Samsung Electronics Co SPI-2213282600 Mobile WiMAX Outdoor RAS User Manual

Samsung Electronics Co Ltd Mobile WiMAX Outdoor RAS Users Manual

Contents

Users Manual

FCC ID : A3LSPI-2213282600 HCT CO., LTD. SAN 136-1, AMI-RI, BUBAL-EUP, ICHEON-SI, KYOUNGKI-DO, 467-701, KOREA TEL:+82 31 639 8517 FAX:+82 31 639 8525 www.hct.co.kr Report No. : HCT-RF09-0316 1/1 ATTACHMENT E. - User Manual -
EPBD-002040 Ed. 00 Mobile WiMAX RAS SPI-2213 System Description
COPYRIGHT This description is proprietary to SAMSUNG Electronics Co., Ltd. and is protected by copyright. No information contained herein may be copied, translated, transcribed or duplicated for any commercial purposes or disclosed to the third party in any form without the prior written consent of SAMSUNG Electronics Co., Ltd. TRADEMARKS Product names mentioned in this description may be trademarks and/or registered trademarks of their respective companies. This description should be read and used as a guideline for properly installing and operating the product. This description may be changed for the system improvement, standardization and other technical reasons without prior notice. If you need updated manuals or have any questions concerning the contents of the manuals, contact our Document Center at the following address or Web site: Address: Document Center 2nd Floor Jeong-bo-tong-sin-dong. Dong-Suwon P.O. Box 105, 416, Maetan-3dong Yeongtong-gu, Suwon-si, Gyeonggi-do, Korea 442-600 Homepage: http://www.samsungdocs.com ©2009 SAMSUNG Electronics Co., Ltd. All rights reserved.
Mobile WiMAX RAS SPI-2213 System Description © SAMSUNG Electronics Co., Ltd. I INTRODUCTION Purpose This description describes the characteristics, functions and structures of the SPI-2213, which is the RAS of Mobile WiMAX. Document Content and Organization This description is composed of five Chapters, an Abbreviation and Index as follows: CHAPTER 1. Overview of Mobile WiMAX System y Mobile WiMAX System Introduction y Characteristics of Mobile WiMAX System y Components of Mobile WiMAX Network y Functions of Mobile WiMAX System CHAPTER 2. Overview of SPI-2213 y SPI-2213 Introduction y Major functions y Resources y System Configuration y Interface between the Systems CHAPTER 3. SPI-2213 Architecture y System Configuration y Hardware Structure y Software Structure y Redundancy
INTRODUCTION II © SAMSUNG Electronics Co., Ltd. CHAPTER 4. Message Flow y Call Processing Message Flow y Network Synchronization Message Flow y Alarm Message Flow y Loading Message Flow y Operation and Maintenance Message Flow CHAPTER 5. Additional Functions and Tools y RET y Web-EMT ABBREVIATION Describes the acronyms used in this description. INDEX Index provides main searching keywords to be found. Conventions The following types of paragraphs contain special information that must be carefully read and thoroughly understood. Such information may or may not be enclosed in a rectangular box, separating it from the main text, but is always preceded by an icon and/or a bold title. NOTE Indicates additional information as a reference. Revision History EDITION DATE OF ISSUE REMARKS 00 02. 2009. First Edition
Mobile WiMAX RAS SPI-2213 System Description © SAMSUNG Electronics Co., Ltd. III TABLE OF CONTENTS INTRODUCTION I Purpose .................................................................................................................................................. I Document Content and Organization..................................................................................................... I Conventions........................................................................................................................................... II Revision History..................................................................................................................................... II CHAPTER 1. Overview of Mobile WiMAX System 1-1 1.1 Introduction to Mobile WiMAX.............................................................................................. 1-1 1.2 Characteristics of the Mobile WiMAX System..................................................................... 1-3 1.3 Mobile WiMAX Network Configuration................................................................................. 1-4 1.4 Mobile WiMAX System Functions ........................................................................................ 1-6 CHAPTER 2. Overview of SPI-2213 2-1 2.1 Introduction to SPI-2213........................................................................................................2-1 2.2 Characteristics of SPI-2213................................................................................................... 2-2 2.2.1 Application of the OFDMA Method....................................................................................... 2-2 2.2.2 Separate DU and RRH Structure ......................................................................................... 2-2 2.2.3 Support of MIMO .................................................................................................................. 2-3 2.2.4 Support of Frequency Reuse Pattern (FRP)........................................................................ 2-3 2.3 Main Functions ...................................................................................................................... 2-4 2.3.1 Physical Layer Processing Function .................................................................................... 2-4 2.3.2 Call Processing Function...................................................................................................... 2-6 2.3.3 IP Processing Functions....................................................................................................... 2-8 2.3.4 Auxiliary Device Interface Function ...................................................................................... 2-9 2.3.5 Maintenance Function .......................................................................................................... 2-9 2.4 Specifications .......................................................................................................................2-11 2.5 System Configuration.......................................................................................................... 2-14 2.6 Interface between Systems................................................................................................. 2-16 2.6.1 Interface Structure...............................................................................................................2-16 2.6.2 Protocol Stack .....................................................................................................................2-17
TABLE OF CONTENTS IV © SAMSUNG Electronics Co., Ltd. 2.6.3 Physical Interface Operation Method .................................................................................2-18 CHAPTER 3. SPI-2213 Architecture 3-1 3.1 System Configuration ............................................................................................................3-1 3.1.1 DU and RRH.........................................................................................................................3-1 3.1.2 Internal Configuration of the System ....................................................................................3-3 3.2 Detailed Structure...................................................................................................................3-4 3.2.1 Digital Main Block (DMB)......................................................................................................3-4 3.2.2 RRH ...................................................................................................................................... 3-7 3.2.3 DPM-FI................................................................................................................................ 3-11 3.2.4 Cooling Structure ................................................................................................................3-13 3.2.5 Interface Structure...............................................................................................................3-14 3.3 Software Structure ...............................................................................................................3-15 3.3.1 Basic Structure....................................................................................................................3-15 3.3.2 Call Control (CC) Block....................................................................................................... 3-17 3.3.3 Operation And Maintenance (OAM) Block .........................................................................3-19 CHAPTER 4. Message Flow 4-1 4.1 Call Processing Message Flow .............................................................................................4-1 4.1.1 Initial Access .........................................................................................................................4-1 4.1.2 Authentication ....................................................................................................................... 4-4 4.1.3 Status Change ...................................................................................................................... 4-7 4.1.4 Location Update..................................................................................................................4-10 4.1.5 Paging.................................................................................................................................4-14 4.1.6 Handover ............................................................................................................................4-15 4.1.7 Access Termination.............................................................................................................4-19 4.2 Network Synchronization Message Flow ...........................................................................4-21 4.3 Alarm Signal Flow ................................................................................................................4-22 4.4 Loading Message Flow ........................................................................................................4-24 4.5 Operation and Maintenance Message Flow .......................................................................4-26 CHAPTER 5. Additional Functions and Tools 5-1 5.1 RET ..........................................................................................................................................5-1 5.2 Web-EMT .................................................................................................................................5-2
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. V ABBREVIATION I A ~ C .................................................................................................................................................... I D ~ H ................................................................................................................................................... II I ~ O .................................................................................................................................................. III P ~ S ..................................................................................................................................................IV T ~ W ...................................................................................................................................................V INDEX I A ~ E .................................................................................................................................................... I F ~ O ................................................................................................................................................... II P ~ T .................................................................................................................................................. III U ~ W ..................................................................................................................................................IV
TABLE OF CONTENTS VI © SAMSUNG Electronics Co., Ltd. LIST OF FIGURES Figure 1.1 Mobile WiMAX Network Configuration ...................................................................1-4 Figure 1.2 Configuration of Mobile WiMAX System Functions (Based on Profile C)...............1-6 Figure 2.1 IPv4/IPv6 Dual Stack Operation.............................................................................2-8 Figure 2.2 DU Configuration (SMFS-F).................................................................................2-14 Figure 2.3 RRH Configuration...............................................................................................2-15 Figure 2.4 Structure of SPI-2213 Interface............................................................................2-16 Figure 2.5 Protocol Stack between NEs................................................................................2-17 Figure 2.6 Protocol Stack between SPI-2213 and WSM.......................................................2-17 Figure 3.1 Internal Configuration of the System (RRH-1) .......................................................3-3 Figure 3.2 DMB Configuration.................................................................................................3-5 Figure 3.3 Sector Configuration Example Using RRH-1 .........................................................3-9 Figure 3.4 Omni Configuration Example Using RRH-1 .........................................................3-10 Figure 3.5 DPM-FI Configuration .......................................................................................... 3-11 Figure 3.6 Power Structure of SPI-2213 ...............................................................................3-12 Figure 3.7 Fan Configuration ................................................................................................3-13 Figure 3.8 Cooling Structure of the DU .................................................................................3-13 Figure 3.9 Interfaces of SPI-2213 (MIMO) ............................................................................3-14 Figure 3.10 Software Structure of SPI-2213..........................................................................3-15 Figure 3.11 CC Block Structure.............................................................................................3-17 Figure 3.12 OAM Software Structure ....................................................................................3-19 Figure 3.13 Interface between OAM Blocks..........................................................................3-20 Figure 3.14 SNMPD Block ....................................................................................................3-21 Figure 3.15 OAGS Block.......................................................................................................3-22 Figure 3.16 WebEMT Block ..................................................................................................3-23 Figure 3.17 CLIM Block ........................................................................................................3-24 Figure 3.18 PAM Block..........................................................................................................3-25 Figure 3.19 UFM Block .........................................................................................................3-27 Figure 3.20 Loader Block......................................................................................................3-28 Figure 3.21 ULM Block .........................................................................................................3-29 Figure 3.22 OPM Block.........................................................................................................3-30 Figure 3.23 OSSM Block ......................................................................................................3-31 Figure 3.24 OER/OEV Block.................................................................................................3-32 Figure 3.25 OCM Block.........................................................................................................3-33 Figure 3.26 RDM Block.........................................................................................................3-35
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. VII Figure 4.1 Initial Access Process............................................................................................ 4-2 Figure 4.2 Authentication Procedure (At the time of initial access) ........................................ 4-4 Figure 4.3 Authentication Procedure (At the time of the Authenticator Relocation) ................ 4-6 Figure 4.4 Awake Mode Æ Idle Mode Status Change Procedure .......................................... 4-7 Figure 4.5 Awake Mode Q Sleep Mode Status Change Procedure ....................................... 4-8 Figure 4.6 Idle Mode Æ Awake Mode (QCS) Procedure ........................................................ 4-9 Figure 4.7 Inter-RAS Location Update Procedure ................................................................ 4-10 Figure 4.8 Inter-ACR Location Update Procedure................................................................ 4-12 Figure 4.9 Paging Procedure................................................................................................ 4-14 Figure 4.10 Inter-RAS Handover Procedure......................................................................... 4-15 Figure 4.11 Inter-ASN Handover (ASN-Anchored Mobility) .................................................. 4-17 Figure 4.12 Inter-ASN Handover (CSN-Anchored Mobility).................................................. 4-18 Figure 4.13 Access Termination (Awake Mode) ................................................................... 4-19 Figure 4.14 Access Termination (Idle Mode) ........................................................................ 4-20 Figure 4.15 Network Synchronization Flow of SPI-2213 ...................................................... 4-21 Figure 4.16 Alarm Signal Flow of SPI-2213 ......................................................................... 4-22 Figure 4.17 Alarm and Control Structure of SPI-2213 .......................................................... 4-23 Figure 4.18 Loading Message Flow ..................................................................................... 4-25 Figure 4.19 Operation and Maintenance Signal Flow........................................................... 4-26 Figure 5.1 Web-EMT Interface ............................................................................................... 5-2
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Mobile WiMAX RAS SPI-2213 System Description © SAMSUNG Electronics Co., Ltd. 1-1 CHAPTER 1. Overview of Mobile WiMAX System 1.1 Introduction to Mobile WiMAX The Mobile WiMAX system is the wireless network system that supports IEEE 802.16 base service. The IEEE 802.16 standard is the basis of Mobile WiMAX, and includes IEEE Std 802.16-2004 defining fixed wireless internet access service and IEEE Std 802.16, P802.16-2004/Cor/D3 defining the technologies supporting mobility, which include handover, paging. Mobile WiMAX Standard In this description, the entire Mobile WiMAX standard is expressed IEEE 802.16. The wireless LAN (Wireless Local Area Network, WLAN) can provide high speed data services, but its radio wave is short and covers only small areas, and also gives limited user mobility. It is difficult for WLAN to ensure Quality of Service (QoS) for data service. On the contrary, the present mobile communication networks support the mobility of the users, but the service charge and the cost of system operations are high due to the limited wireless resources. To provide faster service in the existing mobile communication networks, it requires a separate wireless communication technology such as High Speed Packet Access (HSPA) for the data services. Mobile WiMAX can, therefore, overcome the limitations of the WLAN and present mobile communication networks, and accommodate only the advantages of the system. Mobile WiMAX can ultimately provide the high speed wireless internet services with low cost at any time and in anyplace. Samsung Mobile WiMAX System provides high speed data services using the transmission technology of Orthogonal Frequency Division Multiple Access (OFDMA) by the Time Division Duplex (TDD), and can give wider coverage compared to the existing WLAN. The system performance and the capacity have been expanded by the high performance hardware, and thus, it can easily give various functions and services to the users.
CHAPTER 1. Overview of Mobile WiMAX System 1-2 © SAMSUNG Electronics Co., Ltd. The Mobile WiMAX system consists of Radio Access Station (RAS), Access Control Router (ACR) and Mobile WiMAX System Manager (WSM). RAS manages 802.16 Medium Access Control (MAC)/Physical Layer (PHY) function for Mobile Station (MS), ACR manages various control functions and interworking function between Mobile WiMAX ASN system and CSN system. System Support Standards Network Working Group (NWG) of Mobile WiMAX Forum defines the Mobile WiMAX network as Access Service Network (ASN) and Connectivity Service Network (CSN). RAS of Samsung is Base Station (BS) and ACR is ASN-GW (Gateway) of ASN, respectively. RAS and ACR are based on ASN Profile C and Wave 2 Profile defined in the Mobile WiMAX Forum and the Wave 2 Profile contains Wave 1 Profile.
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 1-3 1.2 Characteristics of the Mobile WiMAX System The major characteristics of Mobile WiMAX system are listed below. High Compatibility and Cross-Interworking The Mobile WiMAX system is based on IEEE 802.16 standard and complies with Wave 2 Profile and ASN Profile C of the Mobile WiMAX Forum. Therefore, the Mobile WiMAX system provides high compatibility and excellent cross-interworking. High Performance Module Structure The Mobile WiMAX system has high performance by using high-performance processor and provides the module structure that it is easy to upgrade hardware and software. High System Stability The Mobile WiMAX system provides the redundancy structure for main modules to ensure higher stability. Variant Advance RF and Antenna Solution Support The Mobile WiMAX system supports Multiple Input Multiple Output (MIMO) and applies the power amplifier to support wideband operation bandwidth. Evolution Possibility into Next Generation Networking The Mobile WiMAX system complies with the structure of the Mobile WiMAX ASN Profile C network and the ASN Profile C network composition is similar to the network structure considered in 3GPP Long Term Evolution (LTE)/Service Architecture Evolution (SAE). Therefore, the Mobile WiMAX system can easily evolve into the next generation network. Maintenance Function with Strengthened Security The Mobile WiMAX system provides the security function (SNMPv2c/SNMPv3, SSH, FTP/SFTP and HTTPs) to all channels for operation and maintenance. The Mobile WiMAX system provides the operator Authentication, Authorization and Accounting (AAA) function to authenticate the operator and assign the right for system access and stores the operation history in a log.
CHAPTER 1. Overview of Mobile WiMAX System 1-4 © SAMSUNG Electronics Co., Ltd. 1.3 Mobile WiMAX Network Configuration Mobile WiMAX network is composed of ASN and CSN. ACR and RAS are involved in ASN and WSM is the Network Element (NE) to manage ACR and RAS. CSN is composed of AAA server, HA and PCRF server. ASN is connected with CSN by router and switch. The following diagram shows the composition of Mobile WiMAX network. Figure 1.1 Mobile WiMAX Network Configuration Radio Access Station (RAS) RAS as the system between ACR and MS has the interface with ACR and provides the wireless connection to MS under IEEE 802.16 standards to support wireless communication service for subscribers. RAS carries out wireless signal exchange with MS, modulation/demodulation signal processing for packet traffic signal, efficient use of wireless resources, packet scheduling for Quality of Service (QoS) assurance, assignment of wireless bandwidth, Automatic Repeat request (ARQ) processing and ranging function. In addition, RAS controls the connection for packet calls and handover. RAS RAS RAS RAS WSM ACR ACRMS MS MS MSEdge Router/SwitchPCRF HA AAA Core Router/SwitchCSNASNInternet …
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 1-5 Access Control Router (ACR) ACR, which is the system between CSN and RAS, enables several RASs to interwork with IP network, sends/receives traffic between external network and MS, and controls QoS. ACR connects to Authentication, Authorization and Accounting (AAA) server and Policy & Charging Rules Function (PCRF) server in Diameter protocol method and provides the interface to NE of CSN. Mobile WiMAX System Manager (WSM) WSM provides the management environment for the operator to operate and maintain ACR and RAS. Home Agent (HA) HA accesses other networks or private networks and enables Mobile IP (MIP) users to access internet. HA interworks with ACR that performs Foreign Agent (FA) function for Mobile IPv4 and interworks with MS to exchange data for Mobile IPv6. Authentication, Authorization and Accounting (AAA) Server AAA server interfaces with ACR and carries out subscriber authentication and accounting functions. The AAA server interfaces with ACR via Diameter protocol and provides Extensible Authentication Protocol (EAP) certification. Policy & Charging Rules Function (PCRF) Server The PCRF server is the server that manages the service policy and interfaces with ACR via Diameter protocol. The PCRF server sends QoS setting information for each user session and accounting rule information to ACR.
CHAPTER 1. Overview of Mobile WiMAX System 1-6 © SAMSUNG Electronics Co., Ltd. 1.4 Mobile WiMAX System Functions The figure below shows the functions of the ASN systems (ACR and RAS) based on Profile C. Each block name complies with the standard of Mobile WiMAX NWG. Figure 1.2 Configuration of Mobile WiMAX System Functions (Based on Profile C) The ACR supports the Convergence Sublayer (CS) and performs the packet classification and Packet Header Suppression (PHS) functions. When the ACR carries out the header compression function, it supports Robust Header Compression (ROHC) defined in the NWG standard. In addition, the ACR performs the paging controller and location register functions for an MS in Idle Mode. In authentication, the ACR performs the authenticator function and carries out the key distributor function to manage the higher security key by interworking with the AAA server as an AAA client. At this time, RAS performs the key receiver function to receive the security key from the key distributor and manage it. The ACR interworks with the AAA server of CSN for authentication and charging services and with the HA of CSN for Mobile IP (MIP) service. The ACR as FA of MIP supports Proxy MIP (PMIP). ASN R6 ASN GW (ACR) Location Register Context Function Handover Function (Handover Relay) Authenticator Key Distributor SFA AAA Client IP Packet Forwarding Header Compression Packet Classification Paging Controller MIP FA PMIP client BS (RAS) Context Function Handover Function (Handover Control) Key Receiver RRC & RRA ARQ Operation MAC PDU Encapsulation/PHY SFM (Admission Control)
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 1-7 The RAS performs the Service Flow Management (SFM) function to create/change/release connections for each Service Flow (SF) and the admission control function while creating/changing connections. In regard to the SFM function of the RAS, the ACR carries out the SF Authentication (SFA) and SFID management functions. The ACR carries out the SFA function to obtain the QoS information from Policy Function (PF) and apply it in the SF creation and performs the SFID management function to create/change/release SFID and map SF according to the packet classification. In handover, the RAS performs the handover control function to determine the execution of the handover and deal with corresponding handover signaling. The ACR confirms the neighbor RAS list and relays the handover signaling message to the target system. At this time, the ACR and the RAS carries out the context function to exchange the context information between the target system and the serving system. The RAS provides Admission Control to collect/manage the MS’s radio resource information and the RAS’s own radio resource information (e.g., BSID). When load balancing is required based on Admission Control results, it performs resource management through FA overriding and BS init HO (Handover). ASN System Function For the detailed description about the RAS functions, refer to Chapter 2 of this system description. For the description about the ACR functions, refer to the system description for ACR provided by Samsung.
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Mobile WiMAX RAS SPI-2213 System Description © SAMSUNG Electronics Co., Ltd. 2-1 CHAPTER 2. Overview of SPI-2213 2.1 Introduction to SPI-2213 The SPI-2213, RAS of Mobile WiMAX, is controlled by ACR and connects Mobile WiMAX calls to MS. The SPI-2213 interfaces with MS via a wireless channel observing the Mobile WiMAX standard (IEEE 802.16) and provides high-speed data service and multimedia service in wireless broadband. To this end, the SPI-2213 provides the following functions: modulation/demodulation of packet traffic signal, scheduling and radio bandwidth allocation to manage air resources efficiently and ensure Quality of Service (QoS), Automatic Repeat request (ARQ) processing, ranging function, connection control function to transmit the information on the SPI-2213 and set/hold/disconnect the packet call connection, handover control and ACR interface function and system operation management function. Physically, the SPI-2213 consists of a Digital Unit (DU) and a Mobile WiMAX base station Remote Radio Head (RRH). The RRH is located remotely from the DU. The DU is a digital unit of 19 in. shelf form and can be installed in an indoor or outdoor 19 in. rack. It supports a capacity up to 2Carrier/3Sector. The DU is operated in omni or sector mode depending on the features of the installation location. An RRH is a standalone RF unit. It is installed on an outdoor wall or pole. The SPI-2213 supports up to 2Carrier/3Sector.
CHAPTER 2. Overview of SPI-2213 2-2 © SAMSUNG Electronics Co., Ltd. 2.2 Characteristics of SPI-2213 The SPI-2331 supports 10 MHz bandwidth per carrier and has a large packet service in high speed. Other features are as follows. 2.2.1 Application of the OFDMA Method OFDMA is used to transmit data to several users simultaneously by using the sub-carrier allocated to each user and transmit data by allocating one or more sub-carriers to a specific subscriber according to the channel status and the transmission rate requested by a user. In addition, since it can select the sub-carriers with excellent features for each subscriber and allocate them to the subscribers when some subscribers divide and use the whole sub-carrier, it can raise the data throughput by distributing the resources efficiently. 2.2.2 Separate DU and RRH Structure As the SPI-2213 consists of a DU and an RRH, it is easy to set up a network and it is easy to change the network configuration. For connections between the DU and RRH, data traffic signals and OAM information are sent/received through the ‘Digital I/Q and C & M’ interface based on the Common Public Radio Interface (CPRI). Physically, optic cables are used. Each of the DUs and RRHs receives -48 VDC of power for its operation. Versatile Network Operation The RRH cannot operate on its own, but operates by being linked to the DU. The RRH is highly flexible in its installation, and helps with setting up a network in a variety of configurations depending on the location and operation method. Easy Installation The optic interface component that interfaces with the DU and the RF signal processing component is integrated into the RRH, which becomes a very small and very light single unit. Therefore, the RRH can be installed on a wall or pole. Moreover, as the distance between the RRH and antenna is minimized, the loss of RF signals due to the antenna feeder line can be reduced so that more enhanced RF receiving performance than the existing rack-type RAS can be provided. Natural Cooling Because the RRH is installed outdoors and has an efficient design, it can radiate heat efficiently without any additional cooling system. Therefore, no additional maintenance cost is needed for cooling the RRH.
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 2-3 Loopback Test The SPI-2213 provides the loopback test function to check whether communication is normal on the ‘Digital I/Q and C & M’ interface line between the DU and RRH. Remote Firmware Downloading The operator can upgrade the RRH and its service by replacing its firmware. Without visiting the field station, the operator can download firmware to the RRH remotely using a simple command from the WSM. In this way, operators can minimize the number of visits to the field station, reducing maintenance costs and allowing the system to be operated with greater ease. Monitoring Port Operators can monitor the information for an RRH using its debug port. 2.2.3 Support of MIMO The SPI-2213 basically supports MIMO of 2Tx/2Rx RF path. There are methods of MIMO as follows; y Downlink − Space Time Coding (STC): method for raising reliability of link − Spatial Multiplexing (SM): method for raising data transmission rate y Uplink Collaborative SM (CSM): method for doubling the frequency efficiency 2.2.4 Support of Frequency Reuse Pattern (FRP) The SPI-2213 supports FRP N=1 that provides the service to 3-sector by using a carrier and FRP N=3 that provides the service to 3-sector by using different carriers. A service provider can efficiently operate its own frequency resources by using the FRP function. Providing or not the System Feature and Schedule to Provide the System Feature For the providing or not the system feature and schedule to provide the features described in this system description, see separate document.
CHAPTER 2. Overview of SPI-2213 2-4 © SAMSUNG Electronics Co., Ltd. 2.3 Main Functions The main functions of the SPI-2213 are as follows: y Physical layer processing function y Call processing function y IP processing functions y Auxiliary device interface function y Convenient operation and maintenance function 2.3.1 Physical Layer Processing Function OFDMA Ranging The ranging supported by the OFDMA system is roughly divided by the uplink timing synchronization method and the contention based bandwidth request method. y Uplink Timing Synchronization In the uplink timing synchronization method, the SPI-2213 detects the timing error of the uplink signal by using the ranging code transmitted from MS and transmits the timing correction command to each MS to correct the transmission timing of the uplink. The uplink timing synchronization method has initial ranging, periodic ranging, handover ranging, etc. y Contention Based Bandwidth Request In the contention based bandwidth request method, the SPI-2213 receives the bandwidth request ranging code from each MS and allocates uplink resources to the corresponding MS to enable to transmit the bandwidth request header. The contention based bandwidth request method has bandwidth request ranging or something. Channel Encoding/Decoding The SPI-2213 carries out the Forward Error Correction (FEC) encoding for the downlink packet created in the upper layer by using Convolutional Turbo Code (CTC). On the contrary, it decodes the uplink packet received from the MS after demodulating. Modulation/Demodulation The SPI-2213 carries out the FEC encoding for the downlink packet created in the upper layer and modulates the encoded packet into the QAM signal. In addition, the SPI-2213 demodulates and decodes the uplink packet received from MS.
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 2-5 OFDMA Sub-carrier Allocation The subchannelization is the process to tie the sub-carriers of OFDMA as a transmission unit after grouping them by a certain rule. The SPI-2213 performs the subchannelization to mitigate the interference between cells. The SPI-2213 maps the column of the modulated downlink QAM symbol structure with each sub-carrier and carries out the subchannelization when the column of the QAM symbol structure is transmitted to the MS over the wireless line. In such way, the SPI-2213 transmits the column of the QAM symbol structure to the MS via the sub-carriers pertained to each subchannel. DL/UL MAP Construction The SPI-2213 informs the air resources for the uplink and the downlink to the MS by using DL/UL MAP. The DL/UL MAP consists of the scheduling information of the SPI-2213 and includes various control information for the MS. Power Control The SPI-2213 carries out the power control function for the uplink signal received from multiple MSs and then set the power intensity of the uplink signal to a specific level. The SPI-2213 transmits the power correction command to each MS and then makes the MS power intensity be the level required in the SPI-2213 when the MS transmits the modulated uplink signal in a specific QAM modulation method. Hybrid-ARQ (H-ARQ) Operation H-ARQ is the physical layer retransmission method using the stop-and-wait protocol. The SPI-2213 carries out the H-ARQ function and raises data throughput by re-transmitting or combining the frame from the physical layer to minimize the effect attending to the change of wireless channel environment or the change in the interference signal level. MIMO The SPI-2213 provides the MIMO function as follows according to Mobile WiMAX Wave 2 Profile: y Downlink − Matrix A (STC) Transmission ratio of the Matrix A or STC is 1 and equal to that of Single Input Single Output (SISO). However The Matrix A or the STC reduces the error of the signal received from the MS by raising the stability of the signal received from the MS by means of the Tx diversity. This technology is, also, effective in low Signal to Noise Ratio (SNR) and provides excellent performance even when the MS moves in high speed. − Matrix B (SM, vertical encoding) Matrix B or SM method raises the effectiveness of the frequency by raising the transmission ratio in proportion to the number of antenna in comparison with SISO. This technology is effective when the reception SNR is high.
CHAPTER 2. Overview of SPI-2213 2-6 © SAMSUNG Electronics Co., Ltd. y Uplink − Collaborative SM Collaborative SM is the technology that doubles the frequency efficiency in view of the SPI-2213 as two MSs with each individual antenna send data simultaneously by using the same channel. 2.3.2 Call Processing Function Cell Initialization Function The SPI-2213 announces the MAC Management message such as DCD/UCD/MOB_NBR-ADV to the cell area in service periodically to enable the MS receiving the message to carry out the appropriate call processing function. Call Control and Wireless Resource Allocation Function The SPI-2213 enables an MS to enter to or exit from the network. When an MS enters to or exit from the network, the SPI-2213 transmits/receives the signaling message required for call processing via R1 interface with the MS or R6 interface with ACR. The SPI-2213 allocates various management/transport Connection Identifier (CID) required for the network entry and service to an MS. When the MS exit from the network, the SPI-2213 collects and release the allocated CID. Handover The SPI-2213 carries out the signaling and bearer processing for inter-sector HO (Handover), inter-ACR HO and inter-carrier HO. At this time, ACR relays the handover message between serving RAS and target RAS through the R6 interface. To minimize the traffic disconnection in inter-RAS HO, the SPI-2213 performs the data switching function. In handover, the SPI-2213 enables the serving RAS to switch the user data in queuing to the target RAS and, therefore, the MS to recover the traffic without loss. Handover Procedure For the detailed handover procedure, refer to Chapter 4 ‘Message Flow’. Support of Sleep Mode Sleep Mode is the mode defined to save the MS power under IEEE 802.16 standard and indicates the status that air resources allocated to an MS are released when the MS does not need traffic reception/transmission temporarily. If the MS in Sleep Mode needs the traffic reception/transmission, the MS returns to the normal status immediately. Both Idle Mode and Sleep Mode are modes to save the MS power. The Idle Mode release all service flows allocated to an MS, while the Sleep Mode releases only the air resources between the MS and RAS temporarily, continuously keeping the service flow information allocated to the MS.
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 2-7 The SPI-2213 carries out the related call processing function by receiving/sending the signaling message required for the status transition into Sleep Mode of MS and the return from the Sleep Mode to Awake Mode of MS. Admission Control (CAC) Function If the SPI-2213 receives the call setup request, such as network entry, Quick Connection Setup (QCS) and handover, from an MS, it monitors the traffic and signaling load for each subcell and the number of user in Active/Sleep Mode and performs the AC function to prevent the system overload. AC can be roughly divided into AC by MS and AC by service flow. y AC by MS If the number of users who the subcell is in Active/Sleep Mode exceeds the threshold when the SPI-2213 receives the call setup request from an MS, it rejects the call setup request of the MS. y AC by service flow When service flow is added, the SPI-2213 checks if the air resources of the requested subcell exceed the threshold and determines the creation of the service MAC ARQ Function The SPI-2213 carries out the ARQ function of the MAC layer. In packet data exchange, the transmission side transmits ARQ block which SDU is divided into, and retransmits the packet according to the ARQ feedback information received from the reception side to raise the reliability of data communication. The SPI-2213 carries out the following function for the service flows applying ARQ: y MAC Management creation and transmission concerned with ARQ operation y Feedback processing depending on ARQ types y Block processing (fragmentation/reassemble/retransmission) depending on ARQ types y ARQ timer/window management QoS Support Function The packet traffic exchanged between ACR and SPI-2213 is delivered to the modem in the SPI-2213. At this time, the SPI-2213 allocates the queue in the modem to each service flow that QoS type is specified to observe the QoS constraint given for each QoS class or service flow and performs the strict-priority scheduling according to the priority. The modem that receives the packet traffic performs the scheduling by using the uplink/ downlink algorithm, such as Proportional Fair (PF) or Round Robin (RR) and transmits the scheduled allocation information to an MS through DL/UL MAP. The MS receiving the DL/UL MAP checks the air resources allocated to the MS and modulates/demodulates the downlink packet or transmits the uplink packet from the allocated uplink area. Since the SPI-2213 provides the QoS monitoring function, it can compile statistics on packets unsatisfying the latency requested from the QoS parameter according to TDD frames and report the statistics to an operator via the OAM interface.
CHAPTER 2. Overview of SPI-2213 2-8 © SAMSUNG Electronics Co., Ltd. 2.3.3 IP Processing Functions IP QoS Function Since the SPI-2213 supports Differentiated Services (DiffServ), it can provide the backhaul QoS in the communication with ACR. It supports 8-class DiffServ and supports the mapping between the DiffServ service class and the service class of the user traffic received from an MS. In addition, the SPI-2213 supports the mapping between Differentiated Services Code Point (DSCP) and 802.3 Ethernet MAC service class. Simultaneous Support of IPv4/IPv6 ACR communicates with the SPI-2213 through the GRE tunnel and the backhaul IP version between the SPI-2213 and ACR is managed independently from the service IP version for the MS. Even if, therefore, IPv4 is used in backhaul between the SPI-2213 and ACR, all of IPv4, IPv6 and IPv4/IPv6 dual stack services can be supported for the MS. Figure 2.1 IPv4/IPv6 Dual Stack Operation IP Routing Function Since the SPI-2213 provides several Ethernet interfaces, it stores the routing table with the information on the Ethernet interface to route IP packets. The routing table of the SPI-2213 is configured depending on operator’s setting and the configuration and the setting of the routing table are similar to the standard setting of the router. The SPI-2213 supports the static routing configuration only and not the router function for the traffic received from the outside. When the SPI-2213 connects an auxiliary device, it supports the IP packet routing function for the auxiliary device by using Network Address Translation (NAT). IPv4 IPv6 Dual Stack MS (IPv4/IPv6) RAS ACRIPv6 Network IPv4 Network Access Network Dual Stack Processing Gateway Gateway Core Network
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 2-9 Ethernet/VLAN Interface Function The SPI-2213 provides the Ethernet interface and supports the static link grouping function, Virtual Local Area Network (VLAN) function and Ethernet CoS function under IEEE 802.3ad for the Ethernet interface. At this time, the MAC bridge function defined in IEEE 802.1D is excluded. The SPI-2213 enables several VLAN IDs to be set in one Ethernet interface and maps the DSCP value of IP header with the CoS value of Ethernet header in Tx packet to support Ethernet CoS. 2.3.4 Auxiliary Device Interface Function The SPI-2213 provides the Ethernet interface to connect auxiliary devices and allocates IP addresses by operating as a DHCP server for the auxiliary devices. In addition, the SPI-2213 provides the traffic path to transmit/receive the maintenance traffic between an auxiliary device and the remote auxiliary device monitoring server. If the auxiliary device uses a private IP address, the SPI-2213 carries out the NAT function to change the address into a public IP address (i.e., the IP address of the SPI-2213) for the communication with an external monitoring server. 2.3.5 Maintenance Function The SPI-2213 interworking with the management system carries out the following maintenance functions: system initialization and restart, management for system configuration, management for the operation parameters, failure and status management for system resources and services, statistics management for system resources and various performance data, diagnosis management for system resources and services and security management for system access and operation. Graphic and Text-based Console Interface WSM manages the entire Mobile WiMAX system by using Database Management System (DBMS) and SPI-2213 interworks with this WSM. In addition, ACR interworks with the console terminal for directly accessing the NE as well as WSM by operator to perform the operation and maintenance function. For operator’s convenience and working purpose, the operator can select graphic-based console interface (Web-based Element Maintenance Terminal, Web-EMT) or text-based console interface (Integrated Management Interface Shell, IMISH). The operator can access the console interface with no separate software and log in to Web-EMT through Internet Explore and IMISH through Secure Shell (SSH) on the command window. The operator can carry out the retrieval and setup of the configuration and the operation information and monitoring about faults, status and statistics via console terminal. However, the operator can carry out grow/degrow of resources and setting of the neighbor list and paging group which have correlation between several NEs only via the WSM.
CHAPTER 2. Overview of SPI-2213 2-10 © SAMSUNG Electronics Co., Ltd. Operator Authentication Function The SPI-2213 provides the authentication and the permission management functions for the operator who manages the Mobile WiMAX system. The operator accesses the SPI-2213 by using the operator’s ID and password via Web-EMT or IMISH and the SPI-2213 assigns the operation right in accordance with the operator’s level. The SPI-2213 carries out the logging function for successful access, access failure and login history. Maintenance Function with Enhanced Security Function For the security, the SPI-2213 supports Simple Network Management Protocol version 2c (SNMPv2c) Simple Network Management Protocol version 3 (SNMPv3) and File Transfer Protocol (FTP) in the communication with WSM and Hyper Text Transfer Protocol over SSL (HTTPs) and Secure Shell (SSH) in the communication with console terminals. On-line Software Upgrade When a software package is upgraded, the SPI-2213 can upgrade the package while running old version of software package. The package upgrade is progressed in the following procedure: ‘Add New Package Æ Change to New package Æ Delete Old Package’. In package upgrade, the service is stopped temporarily because the old process is terminated and the new process is started in the ‘Change to New package’ stage. However, since OS is not restarted, the service will be provided again within a few minutes. After upgrading software, the SPI-2213 updates the package stored in a non-volatile storage. In addition, the SPI-2213 can re-perform the ‘Change to New package’ stage to roll back into the previous package before upgrade. Call Trace Function The SPI-2213 supports the call trace function for a specific MS. The SPI-2213 can carry out the call trace function up to 10 MSs. If a call occurs in the MS that an operator previously specified via ACR, the signaling message and statistical traffic data are transmitted to WSM. Besides, the SPI-2213, also, sends the RF environment information, such as Carrier-to-Interference-and-Noise-Ratio (CINR) for MS, Modulation and Coding Schemes (MCS) level and Burst Error Rate (BER).
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 2-11 2.4 Specifications Capacity The capacity of the SPI-2213 is as follows: Category System Capacity Channel Bandwidth 10 MHz RF Band 2,590~2,690 MHz (100 MHz, UBS) Maximum Number of Carriers/Sectors 2Carrier/3Sector Interface between ACR and SPI-2213 Select one of Fast Ethernet and Gigabit Ethernet FFT size/Carrier/Sector 1,024 Channel Card Capacity 1Carrier/1Sector Output Antenna Port-based - 4 W/Carrier/Path @ 10 MHz, MIMO Input Power The table below lists the power standard for the SPI-2213. Category Standard System Input Voltage a) -48 VDC (Voltage Variation Range: -40~-56 VDC) a) Each of the DU and RRH receives -48 VDC of power for its operation. Unit Size and Weight The table below lists the size and weight of the SPI-2213. Category Standard DU 432 (W) × 396 (D) × 200 (H) Size (mm) RRH 295 (W) × 135 (D) × 410 (H) DU 20 or less Weight (kg) RRH 15 or less
CHAPTER 2. Overview of SPI-2213 2-12 © SAMSUNG Electronics Co., Ltd. Environmental Condition The table below lists the environmental conditions and related standards such as operational temperature and humidity. DU Category Range Temperature Conditiona) 0~50°C (32~122°F) Humidity Conditiona) 10~90% but not to exceed 0.024 kg water/kg of dry air Altitude 0~1,800 m (0~6,000 ft) Vibration GR-63-CORE Sec.4.4 Earthquake Office Vibration Transportation Vibration Sound Pressure Level Less than 65 dBA measured at points 1.5 m (59.1 in) above the floor and 0.6 m (23.6 in) all around. EMI FCC Title47 Part 15 Class A GR-1089-CORE Sec. 3.2 Emission Criteria a) The standards of temperature/humidity conditions are based on the value on the position where is 400 mm (15.8 in.) away from the front of the DU and in the height of 1.5 m (59 in.) on the bottom. RRH Category Range Temperature Conditiona) -40~50°C (-40~122°F) Humidity Conditiona) 10~95% but not to exceed 0.024 kg water/kg of dry air Altitude 0~1,800 m (0~6,000 ft) Vibration GR-63-CORE Sec.4.4 Earthquake Office Vibration Transportation Vibration Sound Pressure Level Less than 65 dBA measured at 1.5 m (5 ft) from the RRH in all horizontal directions at a height of 1 m (3 ft) EMI FCC Title47 Part 15 Class B GR-1089-CORE Sec. 3.2 Emission Criteria US Federal Regulation FCC Title47 Part27 a) The standards of temperature/humidity conditions are based on the value on the position where is 400 mm (15.8 in.) away from the front of the RU and in the height of 1.5 m (59 in.) on the bottom.
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 2-13 Environmental Alarm The table below lists the environmental alarm provided in the SPI-2213 in default. Category Description Temperature Alarm High Temperature Fan Fail System Fan Fail GPSR Specification The table below lists the GPS Receiver (GPSR) characteristics of SPI-2213. Category Description Received Signal from GPS GPS L1 Signal Accuracy/Stability 0.02 ppm RF Specification The table below lists the RF characteristics of the SPI-2213. Category Description Tx Output Power 8 W @avg power per carrier/sector Tx Constellation error In accordance with the 802.16e standard RX Sensitivity In accordance with the 802.16e standard
CHAPTER 2. Overview of SPI-2213 2-14 © SAMSUNG Electronics Co., Ltd. 2.5 System Configuration Physically, the SPI-2213 consists of a DU and RRHs. The boards that make up the DU are mounted on the SMFS-F, which is a 19 in. indoor shelf. The SMFS-F can be mounted on a 19 in. indoor or outdoor commercial rack. y Samsung Mobile WiMAX Flexible Shelf assembly-Front mount (SMFS-F) − Shelf for DU of SPI-2213 − Mounting is supported when mounted on a 19 in. rack. DPM-FI DC Power Module-Flexible Indoor DMB Digital Main Block FAN-FD48 FAN Module-Flexible Digital unit -48 VDC Figure 2.2 DU Configuration (SMFS-F) FAN-FD48 DMB DPM-FI SMFS-F
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 2-15 The RRH is a single unit that can be installed on a wall or pole without an additional shelf or rack. Figure 2.3 RRH Configuration A B B A
CHAPTER 2. Overview of SPI-2213 2-16 © SAMSUNG Electronics Co., Ltd. 2.6 Interface between Systems 2.6.1 Interface Structure The SPI-2213 interfaces with another RAS and ACR as shown in the figure below: Figure 2.4 Structure of SPI-2213 Interface Interface between SPI-2213 and MS The SPI-2213 interfaces with an MS according to the IEEE 802.16 radio access standard to exchange the control signal and the subscriber traffic. Interface between SPI-2213 and ACR The interface between an ACR and the SPI-2213 in the same ASN is R6 and its physical access method is GE/FE. The R6 is the interface between ACR and RAS defined in Mobile WiMAX NWG and is composed of signaling plane (IP/UDP/R6) and bearer plane (IP/GRE). Interface between SPI-2213 and WSM The interface between the SPI-2213 and the WSM complies with SNMPv2c or SNMPv2c/SNMPv3c of IETF standard, FTP/SFTP and proprietary standard of Samsung and its physical access method is GE/FE. CSN ACR R3 (Diameter, MIP) R6 R1 (802.16e) R4SNMP, FTP MS WSM SPI-2213 RASR6 R8 ACR RAS ASN AAA PCRF HA
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 2-17 2.6.2 Protocol Stack Protocol Stack between NEs The figure below shows the protocol stack between NEs. Figure 2.5 Protocol Stack between NEs The SPI-2213 interworks with MSs via R1 interface according to IEEE 802.16 standard and the interface between the SPI-2213 and ACR is R6 interface. The R6 signaling interface is executed on UDP/IP and the R6 traffic interface uses the GRE tunnel. Protocol Stack for Operation and Maintenance Figure 2.6 Protocol Stack between SPI-2213 and WSM The ACR interworks with WSM in IP/UDP-based SNMP method to carry out the operation and maintenance functions. In particular, the SPI-2213 interworks with WSM in IP/TCP-based FTP/SFTP (FTP over SSH) method to collect the statistical data periodically, initialize & restart the system and download software. 16PHY802.16 MAC 802.16 PHY 802.16 MAC GRE(R6)R6UDPIPL2L1MS RAS ACR GRE(R6)R6 UDP L2 L1 IP L2 L1 802.16 PHY WSM RAS IPApplicationFTP TCP SSHFTP TCP SSHL2 IP Application SNMPUDP UDPSNMPL1 L2 L1
CHAPTER 2. Overview of SPI-2213 2-18 © SAMSUNG Electronics Co., Ltd. 2.6.3 Physical Interface Operation Method The SPI-2213 provides Ethernet interface as an ASN interface and can select the type of interfaces depending on the network configuration. At this time, more than one type of interfaces cannot be operated simultaneously. The number of interfaces can be optionally managed depending on the capacity and the required bandwidth of the SPI-2213. The types of interfaces are as follows: Interface Type Number of Ports per Board Number of Ports per System 100/1000Base-T (RJ-45) 4 4 2 2 Ethernet 1000BaseX (SFP) 100/1000Base-T (RJ-45) (Simultaneous operation) 2 2 Ethernet interface operate several links as 802.3ad (static)-based static link aggregation. The operation and maintenance interface (interface with WSM) is operated in in-band method, which shares the common user traffic interface.
Mobile WiMAX RAS SPI-2213 System Description © SAMSUNG Electronics Co., Ltd. 3-1 CHAPTER 3. SPI-2213 Architecture 3.1 System Configuration 3.1.1 DU and RRH The SPI-2213 has a separate structure consisting of a DU and RRHs. Because up to three RRHs can be connected to a DU, the maximum 2Carrier/3Sector MIMO service is possible. DU The DU is composed of a Digital Main Block (DMB), DPM-FI, and FAN-FD48. y DMB The DMB operates and maintains the SPI-2213, enables the SPI-2213 to interface with ACR and provides the communication path between processors in the system. The DMB creates the reference clock, provides the clock to the lower hardware block and performs the signal processing function for the subscriber signal. The DMB also interfaces with the RRH to send and receive data traffic, and receives and controls alarms for the lower hardware blocks or modules, including the RRH. y DPM-FI The DPM-FI receives DC power through a separate rectifier and distributes it to every board and module on the DU shelf. The operator can control DC power supply by turning the circuit breaker at the front of the DPM-FI on/off. y FAN-FD48 The FAN-FD48 is composed of a set of four fans and maintains the inside temperature of the DU within an appropriate range so that the SPI-2213 can operate normally. The FAN-FD48 detects the inside temperature of the DU using a built-in temperature sensor and sets the speed of the fan in accordance with the detected temperature.
CHAPTER 3. SPI-2213 Architecture 3-2 © SAMSUNG Electronics Co., Ltd. RRH The RRH is a unified RF module interfacing remotely with the DU through an optical cable. It is located at the front end of the antenna. On a downlink, it converts the data traffic in the form of ‘Digital I/Q and C & M’ received from the MRA-F of the DU into RF signals, which have up to 8W/carrier/sector output, and then sends them through an external antenna. Conversely, on an uplink, the RRH converts the RF signals received through the antenna into ‘Digital I/Q and C & M’ data traffic, and then sends them to the MRA-F of the DU. The RRH also receives clock information from the DU through the ‘Digital I/Q and C & M’ interface, and sends/receives alarm/control messages.
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-3 3.1.2 Internal Configuration of the System Below are the internal configuration diagrams of the SPI-2213 (2Carrier/3Sector). Figure 3.1 Internal Configuration of the System (RRH-2) αβγ R R H (0) RETR R H (1) RETR R H (2) RET DU DPM-FI F A N - F D 48 M R A - F (0) EthernetUDAM R A - F (1) M R A - F (2) M R A - F (3) M R A - F (4) M R A - F (5) MMA-G MEI-BFE/GE ACRRectifier*Data Traffic + Alarm/Control + Clock(Ethernet) Alarm/Control Power Digital I/Q and C & M(Optic) Clock Optional Item Backhaul Index * Rectifier is not provided by Samsung. GPS
CHAPTER 3. SPI-2213 Architecture 3-4 © SAMSUNG Electronics Co., Ltd. 3.2 Detailed Structure 3.2.1 Digital Main Block (DMB) The DMB supports the operation and maintenance of the SPI-2213, interfacing between the SPI-2213 and ACR, and interfacing between the DU and RRH. It also collects and controls alarms for the lower boards and modules, including the inter-processor communication paths and RRH in the system. The DMB also generates and supplies clocks to the lower hardware blocks, including the RRH, and processes channels for subscriber signals. When the SPI-2213 sends signals to an MS, the DMB performs the OFDMA signal processing on the traffic signals received from the ACR, converts them into optical signals using the ‘Digital I/Q and C & M’ converter, and then sends them to the remote RRH. Conversely, when the SPI-2213 receives signals from an MS, the DMB receives ‘Digital I/Q and C & M’ signals from the remote RRH, performs the OFDMA signal processing on them, and then sends them to the ACR. Main Functions y Creation and distribution of the reference clock y Fast Ethernet/Gigabit Ethernet interface with ACR y Fault diagnosis and alarm collection and control y Alarm report y Channel resource management y OFDMA signal processing y Automatic Gain Control (AGC) for the received RF signal and Received Signal Strength Indicator (RSSI) support y Supporting optical interfacing with the RRH and loopback test
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-5 The DMB is configured as shown in the figure below: Figure 3.2 DMB Configuration Board Name Quantity (Sheet) Function MBB-F 1 Mobile WiMAX base station Backplane Board-Flexible - DMB backboard - Signal routing function for traffic, control signal, clock, power, etc. MMA-G 1 Mobile WiMAX base station Main control board Assembly-General - Main system processor - Call processing, resource allocation and OAM - Reception of the GPS signal and creation and supply of the clock - Alarm collection and report to the upper - Supports FE/GE interface with ACR - Non-volatile memory support MRA-F Max. 6 Mobile WiMAX base station RAS board Assembly-Flexible - Subscriber data traffic processing - OFDMA Processing - 1Carrier/1Sector MIMO - ‘Digital I/Q and C & M’ data formatting - Supporting optical interfacing with the RRH (E/O, O/E conversion) - Supporting loopback tests between the DU and the RRH MEI-B 1 Mobile WiMAX base station External Interface board assembly-Basic - Provides User Defined Alarm (UDA) - Alarm monitoring including fan alarm/high temperature DMBMRA-F(5) MRA-F(4) MRA-F(3) MRA-F(2) MRA-F(1) MRA-F(0) MMA-G MEI-B
CHAPTER 3. SPI-2213 Architecture 3-6 © SAMSUNG Electronics Co., Ltd. Mobile WiMAX base station Main control board Assembly-General (MMA-G) The MMA-G provides a main processor function of the SPI-2213, GPS signal receiving and clock distribution, and network interface functions. y Main Processor Function The MMA-G is the board that carries out the role as the highest layer in the SPI-2213 and is equipped with the main processor. The main processor of the MMA-G performs the functions, such as communication path setting between MS and ACR, Ethernet switch function in the SPI-2213, system operation and maintenance and TDD signal control. The MMA-G manages the status of all hardware and software in the SPI-2213 and reports each status information to WSM via ACR. In addition, the MMA-G allocates and manages the resources of the SPI-2213 and the connection of the MMA-G and a PC for the Web-EMT enables to maintain the SPI-2213 with no interworking with ACR. y GPS Signal Reception and Clock Distribution Function The MMA-G is equipped with Universal Core Clock Module (UCCM) for GPS signal reception. The UCCM enables each block of the SPI-2213 to be operated in the synchronized clock system. The UCCM mounted on the MMA-G creates the system clocks [56 MHz, 12.5 Hz (80 msec), PP2S, analog 10 MHz, 61.44 MHz] by using the reference signal received from a GPS and distributes them to the hardware blocks in the system. These clocks are used to maintain the internal synchronization of the SPI-2213 and operate the system. If no GPS signal is received due to a fault when system operation, the UCCM carries out the holdover function to provide the normal clock for a certain time as provided in the existing system. y Network Interface Function The MMA-G interfaces with an ACR in Gigabit Ethernet or Fast Ethernet method. The MMA-G can provide maximum two Gigabit Ethernet ports or four Fast Ethernet ports per board, and support the link aggregation redundancy method. The MMA-G can be divided as follows depending on the interface types provided by MMA-G, and service provider can choose the interface type. − MMA-GC: Four 100/1000Base-T Copper ports − MMA-GM: Two 100/1000Base-T ports and two 1000Base-X Small Form factor Pluggable (SFP) ports
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-7 Mobile WiMAX base station RAS board Assembly-Flexible (MRA-F) The MRA-F provides a modem function of the SPI-2213 and interfacing with the RRH. y Modem Function The MRA-F is equipped with the modem supporting IEEE 802.16 Mobile WiMAX standard physical layer (PHY) and the modem performs the OFDMA signal processing function by the control of the MMA-G. The MRA-F modulates the packet data received through the MMA-G, converts the modulated signal into the ‘Digital I/Q and C & M’ format and transmits to the RRH. In the contrary, the MRA-F demodulated the data received from the RRH after performing the AGC function, converts the data into the format defined in the IEEE 802.16 Mobile WiMAX physical layer standard and then transmits the converted data to the MMA-G via Ethernet. The MRA-F supports 1Carrier/1Sector 2 × 2 MIMO by default. y Optical interfacing with the RRH and Loopback Test As the MRA-F contains a built-in Electrical to Optic (E/O) conversion device and an Optic to Electrical (O/E) conversion device, it can send and receive ‘Digital I/Q and C & M’ signals of the optical signals between distant RRHs. The MRA-F can also run loopback tests to check whether the interface between the MRA-F and RRHs is in good condition for proper communication. The operator can run the loopback test if necessary using the WSM command. Mobile WiMAX base station External Interface board assembly-Basic (MEI-B) The MEI-B provides paths for alarm information that is generated from external devices (additional equipment provided by the operator). The MEI-B also collects alarms for the fan mounted on the DU to report to the MMA-G. 3.2.2 RRH The RRH is a remote RF device that supports Mobile WiMAX services. It is installed at a remote location from the DU. It performs the function that connects mobile WiMAX calls to an MS, as defined in the 802.16d/e standard. Main Functions Below are the major functions of the RRH. y High-power amplification of RF transmission signal y Interfaces optically with the MRA-F of the DU using ‘Digital I/Q and C & M’ and carries out interfacing for traffic, alarms, control signals, and clock information. y Upconversion/downconversion of frequency y Gain control of RF Rx/Tx signal y Rx/Tx RF signal from/to an antenna y Suppression of out-of-band spurious wave emitted from RF Rx/Tx signal y Low noise amplification of band-pass filtered RF Rx signal (Low Noise Amplifier, LNA) y TDD switching function for Tx/Rx path y Includes the filter part connected to the antenna
CHAPTER 3. SPI-2213 Architecture 3-8 © SAMSUNG Electronics Co., Ltd. RRH Description The RRH is a RF module of the SPI-2213, and supports sending/receiving RF paths. RRH of this system is as follows: Category EA Capacity RF Path Antenna Output RRH-2 Max. 3 2Carrier/1Sector (Contiguous 2Carriers)MIMO (2Tx/2Rx) Outputs 4W/Sector/Carrier at 2 antenna ports each The RRH is an RRH that integrates the RAS transceiver, power amplifier, TDD switch, and filters in a single module. In the case of downlink signals, the RRH converts baseband signals received through the ‘Digital I/Q and C & M’ interface from the MRA-F into Optic to Electrical (O/E). The converted signals undergo Digital to Analog Conversion (DAC) to be converted to analog RF signals, and then are amplified through the current amplification process. Amplified signals are sent to the antenna via the filter part. In the case of uplink signals, the frequency of the signals received through the RRH filter part is lowered by Low Noise Amplifier (LNA). The Analog to Digital Conversion (ADC) process converts these signals to baseband signals. The baseband signals are in the ‘Digital I/Q and C & M’ format, and undergo E/O conversion to be sent to the MRA-F.
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-9 Network Configuration Using the RRH The RRH cannot operate on its own, but operates by being linked to the DU. The RRH is highly flexible in its installation, and helps with setting up a network in a variety of configurations depending on the location and operation method as shown below. Figure 3.3 Sector Configuration Example Using RRH-2 Conditions for Sector Configuration Using RRH-2 2carrier supported by the RRH-2 must be a contiguous type. α Sectorβ Sectorγ Sector2 Carrier/3 Sector RRH-2 for 2Tx/2Rx
CHAPTER 3. SPI-2213 Architecture 3-10 © SAMSUNG Electronics Co., Ltd. Figure 3.4 Omni Configuration Example Using RRH-2 Conditions for Omni Configuration Using RRH-2 - Multiple cells connected to a single DU must belong to a single paging group. - Omni cells must be independent, and not be adjacent to each other. - 2carrier supported by the RRH-2must be a contiguous type. 2Carrier/Omni2 Carrier/3 Sector 2Carrier/Omni2Carrier/OmniRRH-2 for 2Tx/2Rx
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-11 3.2.3 DPM-FI The DPM-FI is mounted to the right of the SPI-2213 DMB. Figure 3.5 DPM-FI Configuration Board Name Quantity Function DPM-FI 1 DC Power Module-Flexible Indoor Receives DC power through a rectifier and distributes it to every block in the DMB Every board of the DMB and the fan (FAN-FD48) of the DU in the SPI-2213 receive power through the MBB-F. Each board of DMB receives -48 VDC and converts it to the required voltage. DPM-FI
CHAPTER 3. SPI-2213 Architecture 3-12 © SAMSUNG Electronics Co., Ltd. The following power diagram shows DU input power that is supplied to DPM-FI and connection points to each board. Figure 3.6 Power Structure of SPI-2213 RRH Power Supply If the RRH is distant from the DU, it is supplied with separate power (e.g., rectifier) of -48 VDC (-40~-56 VDC). DURectifier-48 VDC (-40~-56 VDC)DPM-FI FilterCircuit Breaker MBB-FM E I - B M M A - G MRA - F # 0 MRA - F # 1 MRA - F # 2 MRA - F # 3 MRA - F # 4 MRA - F # 5 FAN-FD48
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-13 3.2.4 Cooling Structure DU The DU of the SPI-2213 maintains the inside temperature of the shelf at an appropriate range using a set of system cooling fans (FAN-FD48), so that the system can operate normally when the outside temperature of the DU shelf changes. Figure 3.7 Fan Configuration Board Name Quantity Function FAN-FD48 1 FAN Module-Flexible Digital unit -48 VDC DU cooling fan The cooling structure of the DU in the SPI-2213 is as follows. Figure 3.8 Cooling Structure of the DU The FAN-FD48 has a built-in temperature sensor. RRH The RRH of the SPI-2213 is designed with a natural cooling system that supports an outdoor environment with no additional fan or heater. FAN-FD48
CHAPTER 3. SPI-2213 Architecture 3-14 © SAMSUNG Electronics Co., Ltd. 3.2.5 Interface Structure The layout of SPI-2213 interfaces is as shown in the figure below: MIMO Support Figure 3.9 Interfaces of SPI-2213 (MIMO) The SPI-2213 supports MIMO and provides the administrator with the following external interface. y External Interface of DU Category Interface Type Port No. Connector Type 2 1000 Base-X: SFP (LC) Simultaneous operation of 1000Base-X and 100/1000Base-TX 2 100/1000 Base-Tx: RJ-45 Backhaul 100/1000 Base-TX 4 RJ-45 GPS Antenna Analog RF 1 SMA RRH interface Digital I/Q and C & M Max. 6 SFP (Single mode) y External Interface of RRH-2 Category Interface Type Port No. Connector Type TX coupling port Analog RF 2 SMA Antenna Interface Analog RF (Main Traffic) 2 N-type DU interface Digital I/Q and C & M 1 Optic (LC) Power DC power (-48 VDC) 1 Circular Connector MMA-G DU MEI-B Main ProcessingClock ProcessingPower Filter& Distribution DPM-FI MRA-F Digital I/Q and C & M pathBaseband ProcessingExternal Alarm& Control FAN Alarm from FAN-FD 48 Open/Short for UDA High Temp. Alarm form Temp. Sensor -48 VDC FE to Console RS-232 for Debug port From GPS Ant Analog 10 MHz Output RS-232 for Debug Digital I/Q and C & M(Optic) From/to RRH RRH E/O, O/E conversionRET RelayDigital I/Q and C & M(Optic) from/to MRA-F TDD Clock Output Digital I/Q andC & M path E/O, O/E conversion2Tx ports to Antenna 2Rx ports from Antenna RF output monitoring RS-232 for Debug TDD Signal Output -48 VDC input DC Power to RET RF ProcessingPower Module
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-15 3.3 Software Structure 3.3.1 Basic Structure The components of the SPI-2213 software are shown below: Operating System (OS), Device Driver (DD), Middleware (MW), Network Processor Software (NPS), IP Routing Software (IPRS), and application. The application is divided by Call Control (CC) block for the call processing and the OAM block for operation and maintenance of the SPI-2213. Figure 3.10 Software Structure of SPI-2213 Operating System (OS) OS initializes and controls the hardware device, and runs the software operation in the hardware. To operate the software, OS uses the embedded Linux OS, and manages the dual software processes. Then, OS provides various functions efficiently with limited resources. Middleware (MW) MW helps the smooth operation between OS and application under various types of hardware environment, and to achieve this, MW provides various services: message delivery service between applications, event notification service, debugging utility services. In addition, the MW provides the systematic and strong management of the account, the authority and the authentication function. Device Driver (DD) DD manages the normal operation of applications that OS does not control in the system. DD provides the API for the user processor to setup/control/detect the hardware device. Also, DD confirms the device configuration by receiving the configuration data from the upper user processor, and also provides the functions of register manipulation for device operation, device diagnosis, statistics and status management. MW IPRSOS DD NPS Hardware OAMCC APPLICATION
CHAPTER 3. SPI-2213 Architecture 3-16 © SAMSUNG Electronics Co., Ltd. Network Processor Software (NPS) NPS manages the innate functions of Network Processor (NP) that mainly processes the packets, and it connects the upper processor and NP in Board Processor (BP), and provides the functions of NP message processing, NP statistics data collection and report. IP Routing Software (IPRS) IPRS executes the IP routing protocol function. IPRS collects and manages the system configuration and status data necessary for IP routing operation, and based on the data, it generates the routing table via the routing protocol, and makes packet forwarding possible. Call Control (CC) CC is a software subsystem that processes the calls in the SPI-2213, and CC interfaces with MS and ACR. CC supports data exchange function to support wireless data service such as the MAC scheduling, air link control, ARQ processing and IEEE 802.16 message processing. Operation And Maintenance (OAM) The OAM provides the interface (SNMPv2c/SNMPv3, FTP/SFTP, HTTPs, SSH) of which the security is strengthened, and which is standardized to interwork with the upper management system such as the WSM, the Web-EMT and console terminal based on the IMISH. In addition, this performs the functions of initializing and restarting the system, collecting the statistics for processing the call and various performance data, managing the system configuration and resources, managing the status of the software resources and the hardware resources, managing the failure and performing the diagnostics for the operation and the management of the SPI-2213.
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-17 3.3.2 Call Control (CC) Block The CC block caries out the resource management function of the SPI-2213 and the BS function of ASN Profile-C defined in NWG of Mobile WiMAX forum. The CC block consists of RAS Resource Controller (RRC), RAS Service Controller (RSC) and RAS Traffic Controller (RTC) sub-blocks and the functions of each sub-block are as follow: Figure 3.11 CC Block Structure RRC as the resource manager of the SPI-2213 exchanges the status information with all blocks and assigns appropriate software resources to a service when it receives the necessary service request from RAS/ACR. RSC processes the MAC signaling via R1 interface and interworks with ACR via R6 interface. RSC performs the Call Admission Control (CAC) in the service creation process and requests the traffic channel setup to RTC. In addition, RSC transfers the information on the internal control message to the modem block in the SPI-2213. RTC fragments the user data received from ACR via the R6 interface in MAC PDU format and transfers the data to the modem block or re-assembles the MAC PDU received from an MS via the R1 interface and transmits to ACR. In addition, the RTC interworks with the RSC block controlling the RAS signal and performs the call setup/release procedure. 3.3.2.1 RAS Resource Controller (RRC) RRC is in charge of the resource management of the SPI-2213 and is activated on the MMA-G. The RRC interfaces with ACR outside the system and the RSC and OAM blocks inside the system. Main functions of RRC are as follows: y ACR Keep Alive y RSC Keep Alive y Inter Carrier Load Balancing y Paging Message Transmission y System Resource Management MMA-G RRC 1) RAS signaling interface 2) RAS state monitoring CC RSC 1) RAS signaling interface 2) Modem control interfaceRTC 1) RAS traffic interface 2) Modem traffic interface MRA-F
CHAPTER 3. SPI-2213 Architecture 3-18 © SAMSUNG Electronics Co., Ltd. 3.3.2.2 RAS Service Controller (RSC) The RSC is in charge of the signaling-concentrated service in the SPI-2213. As for the system outside, the RSC performs the message exchange with ACR via the Mobile WiMAX standard R6 interface. As for the system inside, RSC interworks with the RTC that is in charge of traffic data and transmits the information on the internal control message to the modem block. The RSC performs the MAC message exchange described in IEEE 802.16 with an MS and carries out the call setup procedure by interworking with the RRC via the system internal message. The RSC is activated on MRA. Main functions of RSC are as follows: y CID Creation and Release y MAC Management Message Processing y R6 Interface Message Processing y Handover processing y Sleep Mode Support for Power Reduction y Collection of Various Statistics y Paging Relay Function for MS 3.3.2.3 RAS Traffic Controller (RTC) The RTC is the block to process the traffic of the SPI-2213. The RTC is the block pertaining to the bearer plane and is located as the kernel module format of the corresponding CPU. The RTC performs the R6 interface under IEEE 802.16 standard and enables to the modem block to perform the R1 interface normally. The RTC fragments the user data received from ACR via the R6 interface in MAC PDU format and transfers the data to the modem block or re-assembles the MAC PDU received from an MS via the R1 interface and transmits to ACR. In addition, the RTC interworks with the RTC block controlling the RAS signal and performs the call setup/release procedure. This process is carried out via the memory interface in the RAS card (MRA-F). The RTC communicates with the modem block via the PCI interface. The RTC is activated on MRA and its main functions are as follows: y ARQ function: Receives the ARQ feedback message from an MS and processes the message. y Analyzes and processes the RSC control message and performs the queue management. y Performs the traffic interface with the modem block. y Performs the scheduling function for each QoS class
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-19 y Data Traffic Processing Function RTC provides the data path between ACR and the SPI-2213 via the R6 data path (GRE tunnel). y Traffic Control Function for Handover In handover, RTC performs the data synchronization function between serving RAS/ACR and target RAS/ACR. 3.3.3 Operation And Maintenance (OAM) Block OAM block manages the operation and maintenance of the SPI-2213, and it is divided as the three shown below: EMS Interface (EMI), Main OAM and Board OAM. Figure 3.12 OAM Software Structure The following interface structure diagram shows the communication between OAM blocks. Main OAM and EMI are running on the MMA-G that support master OAM. Board OAM is running on the remaining lower processor board. OAM (Operation And Maintenance) EMI 1) SNMPD 2) OAGS 3) Web-EMT 4) CLIM 5) PAM Main OAM6) UFM 7) Loader 8) ULM 9) OPM 10) OSSM 11) OER/OEV 12) OCM 13) RDM Board OAM 6) UFM 7) Loader 8) ULM 9) OPM 10) OSSM
CHAPTER 3. SPI-2213 Architecture 3-20 © SAMSUNG Electronics Co., Ltd. Figure 3.13 Interface between OAM Blocks The EMI carries out SNMP agent and web server function, and provides the OAM interface between the management system (WSM, Web-EMT and CLI Terminal) and the SPI-2213 by providing the IMISH. Then, to access the SPI-2213 directly via the Web-EMT or the console terminal, the process of the operator authentication and the authority allowance via the WebEMT or Pluggable Authentication Module (PAM) block should be done. The Main OAM is located in the main processor. The Main OAM communicates with the upper management system by interworking with the EMI block and distributes the Programmable Loading Data (PLD) to the lower processors by managing the system configuration as the format of the PLD. In addition, the Main OAM performs the role of the Image Server (IS) and the Registration Server (RS), collects and saves the statistics data and the failure information, and reports them to the upper management system. The Board OAM is located in the lower processor. The Board OAM collects the failure and the statistics data of each board, reports them to the Main OAM and monitors the software process of each board. Functional details of each block are as follows. OPMUFMMain ProcessorMain OAM IPC API APIShared Memory Web-EMT WSM Image Server WSMFTP/SFTP SNMPv3 Board OAM Loader ULMOSSMBoard Processor…HTTPsSSHTerminal Console CLIMMDSOAGS/SNMPD WebEMT Software Entity PAM UFMLoaderOER/OEVOCM OPM ULM OSSMRDMMDSIPC API APIShared Memory Software Entity
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-21 3.3.3.1 SNMP Daemon (SNMPD) SNMPD plays the SNMP agent role to support the standard SNMP (SNMPv2c/SNMPv3) and an interface role for the upper management system (WSM) and interworks with internal subagent. While receiving requests on the standard MIB object from WSM are processed by SNMPD itself, it transmits requests on the private MIB object to subagent in order to be handled properly. SNMPD Main Functions y Standard MIB processing If the request for the MIB-II object is received, the SNMPD processes it directly and transmits the response. y Private MIB processing If the request for the Private MIB object is received, it is not processed directly by the SNMPD, but it is transmitted to the corresponding internal subagent, and then the response is transmitted from the subagent and it is transmitted to the manager. SNMPD Implementation SNMPD is implemented on the MMA-G as shown below. Figure 3.14 SNMPD Block MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
CHAPTER 3. SPI-2213 Architecture 3-22 © SAMSUNG Electronics Co., Ltd. 3.3.3.2 Common SNMP Agent Subagent (OAGS) OAGS plays the SNMP subagent role to support the standard SNMP (SNMPv2c/SNMPv3). Also, through master agent (SNMPD) OAGS plays an interface role for the upper management system for the command inquiry and change of ACR to be operated through the get/get-next/get-bulk/set/trap command defined by SNMP. OAGS Main Functions y Providing private MIB − Provide private MIB to the management system. − Generate the message data file necessary for the interface function between OAM blocks. y SNMP command processing Process the command received from the management system and transmit the corresponding result via the SNMPD. y Notification function Send the SNMP trap to master agent (SNMPD) whenever there are needs to inform the change or the alarm of the SPI-2213 data to the upper management system. OAGS Implementation OAGS is implemented on the MMA-G as shown below. Figure 3.15 OAGS Block MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-23 3.3.3.3 Web-based Element Maintenance Terminal (WebEMT) The WebEMT is the block to interface with the Web client of the console terminal which uses the Web browser, and performs the role of the Web server. Both Web-EMT and the SPI-2213 support the HTTP communications based on the Secure Sockets Layer (SSL). WebEMT Main Functions y Web server function − HTTP server for the management using Web-EMT − Receive html requests and display HTML pages y OAM block interface − Process commands from Web-EMT interoperating with other OAM blocks − User management WebEMT Implementation WebEMT is implemented on the MMA-G. Figure 3.16 WebEMT Block MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
CHAPTER 3. SPI-2213 Architecture 3-24 © SAMSUNG Electronics Co., Ltd. 3.3.3.4 Command Line Interface Management (CLIM) The CLIM is the block to interface with the IMISH, when it is connected to the console terminal via the Secure Shell (SSH) method. The CLIM processes the received command via the IMISH and displays the corresponding result. CLIM Main Functions y IMISH command processing − Setup/change/inquiry of interface and routing functions − Setup/change/inquiry of the SPI-2213 operation & maintenance CLIM Implementation CLIM is implemented on the MMA-G as shown below. Figure 3.17 CLIM Block MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-25 3.3.3.5 Pluggable Authentication Module (PAM) The PAM receives the account and the password of the operator who uses the console terminal (IMISH and Web-EMT) when logging in, thus it perform the operator authentication and the process of allowing the authority. PAM Main Functions y Operator’s account management and authentication The function of managing and authenticating the account of the operator who uses the console terminal (IMISH and Web-EMT) is performed. y Operator’s authority management The function of allowing the authority for all the commands which the operator can perform is performed. y Password management Management functions such as creating the operator’s password, saving and updating the encryption are performed. PAM Implementation PAM is implemented on the MMA-G as shown below. MMA-G has 1:1 active/standby redundancy. Figure 3.18 PAM Block MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
CHAPTER 3. SPI-2213 Architecture 3-26 © SAMSUNG Electronics Co., Ltd. 3.3.3.6 Universal Fault Management (UFM) UFM manages the ACR faults and the status of software and hardware. UFM informs the detected failures to the upper management system by the filtering function, and applies the severity changes and the threshold to the fault management system. In particular, the UFM receives ToD from a Global Positioning System (GPS) signal receiver, distributes the received ToD to CC software for call processing, and manages faults concerned with the ToD. The UFM supports statistics and status management of Ethernet switch devices. UFM Main Functions y Failure Management − Hardware and software failure management by interrupt and polling − When the failure is detected, it is reported to the management system and the related block. y Status Management − Status management for the components − When the status information of the resource is changed, it is reported to the management system and the related block. y Failure filtering and inhibition − The filtering function is applied to many kinds of the occurred failure, and only the failure of the original reason is reported. − Function of inhibiting reporting a specific kind of failure or a specific system according to the operator’s request y Inquiring and changing the failure configuration information Inquiring and changing the parameters such as the failure severity and the threshold for the generation y Failure audit Auditing the failure is performed when initializing and restarting the system and when the operator requests to minimize the inconsistency of the failure information between the ACR and the upper management system. y Failure history information management The failure history information is managed and saved, and the failure information is saved in its own nonvolatile storage periodically. y Call fault reporting In case of the call fault, the related information (call status, error code, MS information, etc.) is collected and reported to the management system. y DD Interface The interface between DD and applications is provided for statistics and status management of devices.
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-27 UFM Implementation UFM is implemented in MMA-G and all lower boards as shown below. Figure 3.19 UFM Block 3.3.3.7 Loader Loader manages the entire process from the start of OS to the previous step of ULM running (pre-loading). After that, if ULM is actuated after the initialization script is executed and the registration and loading function is performed, the loader monitors the ULM block. Loader Main Functions y System time setting Before NTP-based synchronization, the system time is set by receiving the Time of Date (ToD) from a GPS receiver. y SPI-2213 registration and loading − Registration of the SPI-2213 to the Registration Server (RS) − Determination of the loading method 1) Loading as the latest version via the version comparison: Loading via its own nonvolatile storage or remote IS 2) Loading via the console port (at this time, omitting the registration of the SPI-2213 to the RS) y Backing up and restoring the software image and the PLD Loader saves the software image and the PLD of the latest version in its own nonvolatile storage and restores it as the corresponding information when required. (In case of PLD, back-up by operator’s command) y ULM monitoring Loader monitors whether the ULM block operates normally and if it is abnormal, this restarts it. MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
CHAPTER 3. SPI-2213 Architecture 3-28 © SAMSUNG Electronics Co., Ltd. Loader Implementation Loader is implemented on the MMA-G and all lower board as shown below. Figure 3.20 Loader Block 3.3.3.8 Universal Loading Management (ULM) ULM downloads and executes the packages that are identified in the file list downloaded by loader during pre-loading process. Also, ULM monitors the executed software and provides the running software information, and supports the restart and the software upgrade by the command. In addition, in the initialization stage, ULM sets the system time by using the Time of Date information obtained from a GPS receiver and periodically performs the synchronization with the NTP server by actuating as an NTP client after the loading is completed. ULM Main Functions y System initialization and reset − System reset by command − Act as internal RS & IS of lower board y Software management − Monitor the operation of software block and restart the software block in abnormal state − Software restart by command − Provide information on software block and the status y Inventory Management − ULM provides the information such as the software version for the components, the PBA ID, the PBA version and the serial number, etc. − Function of reporting the inventory information when performing the initialization, adding and extending the components y Online upgrade and version management for the software ULM provides the functions of updating the software and the firmware, upgrading the package and managing the version. MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-29 y System time information synchronization Synchronize system time information with NTP server as a NTP client and transmit the time information to the lower boards y Time Zone setup Setup Time Zone and Daylight Saving Time (DST) y Mortem time update Setup mortem time after system time information synchronization ULM Implementation ULM is implemented on the MMA-G and all lower board as shown below. Figure 3.21 ULM Block MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
CHAPTER 3. SPI-2213 Architecture 3-30 © SAMSUNG Electronics Co., Ltd. 3.3.3.9 Common Performance Management (OPM) OPM collects and provides the performance data for the upper management system operator to know the SPI-2213 performance. The OPM collects the event generated during the system operation and the performance data and transmits them to the management system. The collection cycle of the statistics data of the actual OPM can be set as 15 minutes, 30 minutes, 60 minutes, and if the entire statistics file of the binary format is created every 15 minutes, the management system collects it periodically via the FTP/SFTP. OPM Main Functions y Record and collect statistics data Record statistics data to the memory and generate the statistics file by regularly collecting data per each board y Save the statistics data Save the statistics data of each board in its own nonvolatile storage during up to eight hours y Inquire and change the statistics configuration information Inquire and change the collection cycle (BI) and the threshold of the statistics data y Threshold Cross Alert (TCA) Generate the TCA (Critical, Major, Minor) according to the defined threshold in every collection cycle and report it to the UFM y Monitor the statistics in real time Provide the real-time monitoring function for the specific statistics item designated by the operator OPM Implementation OPM is implemented on the MMA-G and all lower board as shown below. Figure 3.22 OPM Block MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-31 3.3.3.10 Common Subscription Service Management (OSSM) OSSM distributes the PLD data necessary for the software blocks, and reports the data changed to the corresponding software block if PLD data are changed. Also, it supports the function to maintain the consistency of PLD data that are scattered in the system. OSSM Major Functions y PLD distribution OSSM loads PLD to the shared memory for software block in order to access PLD y PLD change report Report the changes of PLD to the corresponding software block y PLD audit Maintain the consistency of PLDs which are distributed in the SPI-2213 (between main board and lower boards) OSSM Implementation OSSM is implemented on the MMA-G and all lower board. Figure 3.23 OSSM Block MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
CHAPTER 3. SPI-2213 Architecture 3-32 © SAMSUNG Electronics Co., Ltd. 3.3.3.11 Common Event Router (OER)/Common Event Viewer (OEV) The OER/OEV manages the event history as the text format. The OER/OEV transmits the information on all the events received from the OAM applications to the related agent (OAGS, WebEMT), and creates and saves the history file of the daily/hourly events, and displays the log contents on the operator window (IMISH) in real time. OER Major Functions y Event transmission OER/OEV transmits the information on the generated event to the OAGS or the WebEMT block, thus it enables to report it to the management system. y Creating and saving the event history file OER/OEV creates and saves the daily/hourly event history file in its own nonvolatile storage as the 1 Mbyte maximum size. y Event display OER/OEV displays the event generated in the SPI-2213 on the operator window (IMISH) in real time. OER/OEV Implementation OER/OEV is implemented on the MMA-G as shown in the figure below. Figure 3.24 OER/OEV Block MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-33 3.3.3.12 Common Configuration Management (OCM) OCM manages the SPI-2213 configuration and parameter with PLD, and it provides the data that are necessary for the software blocks. Other software blocks can approach PLD by the internal subscription service (OSSM), and through the command from EMI. OCM provides the following functions: SPI-2213 configuration grow/degrow, inquiry and change of configuration data and operational parameters. OCM Major Functions y ACR configuration management Manage the SPI-2213 system configuration with PLD y PLD inquiry and change − Upper management system inquires and changes PLD by command − PLD changes are updated in its own nonvolatile storage by operator’s command. y PLD audit For the consistent PLD data with the upper management system y Grow/degrow of resources Link, board, sector, the auxiliary devices in the SPI-2213 OCM Implementation OCM is implemented on the MMA-G. as shown in the figure below. Figure 3.25 OCM Block MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
CHAPTER 3. SPI-2213 Architecture 3-34 © SAMSUNG Electronics Co., Ltd. 3.3.3.13 RAS Diagnosis Management (RDM) The RDM checks if internal and external connection paths or resources of the SPI-2213 are normal. The connection paths are roughly divided into the external path between the SPI-2213 internal IPC path and another NE and the path between ACR and the SPI-2213. In addition, it supports the on-demand test at the request of an operator and the periodical test according to the schedule defined by the operator. RDM Functions y Path Test − Internal path test: Ping test for the IPC path of the board level in NE − External path test: Traceroute test for external hosts − Traffic path test: Test for the UDP message-based bearer path between ACR and the SPI-2213 − Backhaul quality test: Test for the loss, delay and delay variance of backhaul between ACR and RAS (based on ping) y Software Block Test Ping test for main programs by processors y RF Exchange Test Tx path, Receive Signal Strength Indicator-based (RSSI-based) Rx path and VSWR diagnosis y DU-RRH Loopback Test Support of loopback function for ‘Digital I/Q and C & M’ interface y Backhaul performance monitoring test Quality (packet loss, delay and delay variance) measurement for backhaul between ACR and the SPI-2213 y Periodical online test by the operator setting y Change of the Diagnosis Schedule Schedule setup, such as diagnosis period, start time and end time of periodical online test y Support of Call Trace Function It reports the call trace information (signaling message of a specific MS, RF parameter, and traffic statistics) to the management system via SNMPD. y Virtual Interface (VIF) generation and removal Generate and remove VIF based on physical link configuration in PLD y VIF state management Change the state of physical VIF with link failure y RF Module Setup and Control Transmission of the setup information required for the RF module, redundancy structure and management of failure/status
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 3-35 RDM Configuration The RDM is implemented on the MMA-G as shown in the figure below. Figure 3.26 RDM Block MRA-F #5 MRA-F #4 MRA-F #3 MRA-F #2 MRA-F #1 MRA-F #0 MMA-G MEI-B
CHAPTER 3. SPI-2213 Architecture 3-36 © SAMSUNG Electronics Co., Ltd. This page is intentionally left blank.
Mobile WiMAX RAS SPI-2213 System Description © SAMSUNG Electronics Co., Ltd. 4-1 CHAPTER 4. Message Flow 4.1 Call Processing Message Flow 4.1.1 Initial Access The following is the procedure to set the Provisioned Service Flow (SF) of the network-initiated Dynamic Service Add (DSA) mode in the process of the initial network entry. An MS periodically receives Downlink Channel Descriptor (DCD), Downlink-MAP (DL-MAP), Uplink Channel Descriptor (UCD) and Uplink-MAP (UL-MAP) messages from the RAS in the initial access, acquires the downlink channel synchronization and the uplink parameter and sets the Provisioned SF connection. The NWG standard defines PMIP and CMIP to support Mobile IP and the procedure below takes account of both PMIP and CMIP. But, ACR supports PMIP only.
CHAPTER 4. Message Flow 4-2 © SAMSUNG Electronics Co., Ltd. Figure 4.1 Initial Access Process MS RAS ACR AAA 8) Authentication & Key Exchange HAIn PMIP case In CMIPcase 1) RNG-REQ 2) RNG-RSP 3) SBC-REQ 6) SBC-RSP 9) REG-REQ 12) REG-RSP 15) DSA-REQ 16) DSA-RSP 19) DSA-ACK 20) DHCP Discover 23) DHCP Offer 24) DHCP Request 25) DHCP Ack 27) MIP REG REQ 30) MIP REG RSP 26) Agent Advertisement 7) MS_PreAttachment_Ack 10) MS_Attachment_Req 11) MS_Attachment_Rsp 13) MS_Attachment_Ack 17) Path Registration Response14) Path Registration Request21) MIP REG REQ 22) MIP REG RSP 28) MIP REG REQ 29) MIP REG RSP 31) ACR 32) ACA 18) Path Registration Ack 4) MS_PreAttachment_Req 5) MS_PreAttachment_Rsp
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 4-3 Classification Description (1)~(2) The MS transmits the RNG-REQ message including its own MAC address and the Ranging Purpose Indication to the RAS, and the RAS allocates the Basic & Primary Management CID and transmits the RNG-RSP message to the MS. (3)~(4) The MS transmits the SBC-REQ message to the RAS including the physical parameter and the authorization policy information which it supports. The RAS transmits the MS_PreAttachment_Req message to the ACR including the authorization policy support via the Default IP address and the UDP port number of the ACR. (5)~(7) The ACR transmits the MS_PreAttachment_Rsp message to the RAS including the supported authorization policy, and the RAS extracts the information received from the ACR, attaches it to the SBC-RSP message and transmits it to the MS. Then, RAS transmits the MS_PreAttachment_Ack to the ACR, and notifies the start point of the next process (EAP transmission) explicitly. (8) The procedure of the subscriber authentication between the MS and the AAA server is performed, and when the authentication is successful, the ACR receives the provisioned policy information for each subscriber from the AAA server. For the detailed information, see ‘4.1.2 Authentication’. (9)~(13) The MS transmits the REG-REQ message to the RAS including the registration information (MS Capabilities, CS Capabilities, HO Support, etc), and the RAS transmits the MS_Attachment_Req message to the ACR to inquire the corresponding MS Capability and the corresponding CS Capability. The ACR transmits the response to the RAS including the result of the requested registration information, and the RAS transmits the REG-RSP message to the MS. The RAS transmits the MS_Attachment_Ack to the ACR, and notifies the start point of the next process explicitly. (14)~(19) To request the DSA for the Pre-Provisioned SF, the ACR transmits the RR-Request message to the RAS, including the SFID, the Resource Description field (SF/CS parameter) and the Data Path ID (=GRE Key) field to set the data path with the RAS. The RAS receives this message and performs admission control for this, and then transmits the DSA-REQ message to the MS. The MS attaches the Confirmation Code to the DSA-RSP message as a result of DSA-REQ and transmits the message to the RAS, and the RAS transmits the RR-Response message to the ACR including the Data Path ID to set the data path with the ACR. Then the ACR transmits the RR-Confirm message to the RAS, and the RAS transmits the DSA-ACK message to the MS. (20)~(25) This is the procedure to allocate the IP address to the MS, which uses the PMIP, if the MS requests the DHCP procedure to acquire the IP address, the ACR performs the PMIP procedure. (26)~(30) This is the procedure to allocate the IP address to the MS, which uses the CMIP, if the MS requests the MIP registration directly, the ACR operates as the FA and interworks with the HA and allocates the MIP address to the MS. (31)~(32) The start of accounting process for the service flow created in the stages of (14) to (19) is notified to the AAA server.
CHAPTER 4. Message Flow 4-4 © SAMSUNG Electronics Co., Ltd. 4.1.2 Authentication At the Time of Initial Access The MS authentication procedure performed in ‘4.1.1 Initial Access’ is as follows: Figure 4.2 Authentication Procedure (At the time of initial access) Classification Description (0)~(2) When the ACR receives MS_PreAttachment_Req_Ack for SBC-RSP from the RAS, the ACR includes the EAP Request/Identity payload in the AuthRelay-EAP-Transfer message and transmits the message to the RAS to start the EAP authentication. The RAS relays the received EAP payload to the MS by using the PKMv2 EAP-Transfer/PKM-RSP message. (3)~(5) The MS transmits the PKMv2 EAP-Transfer/PKM-REQ message to the RAS by including the NAI in the EAP Response/Identity, and the RAS relays this to the ACR by using the AuthRelay-EAP-Transfer message. Then, the authenticator of the ACR analyzes the NAI and transmits the Diameter EAP Request (DER) message to the home AAA of the MS. (6)~(11) The subscriber authentication procedure is performed between the MS and the AAA server according to the EAP-method. MS RAS ACR AAARepeat 2) PKM-RSP (PKMv2 EAP-Transfer) 3) PKM-REQ (PKMv2 EAP-Transfer) 8) PKM-RSP (PKMv2 EAP-Transfer) 9) PKM-REQ (PKMv2 EAP-Transfer) 14) PKM-RSP (PKMv2 EAP-Transfer) 17) PKM-RSP 18) PKM-REQ (PKMv2 SA-TEK-Request) 19) PKM-RSP 20) PKM-REQ (PKMv2 Key Request) 21) PKM-RSP (PKMv2 Key Reply) (PKMv2 SA-TEK-Challenge) (PKMv2 SA-TEK-Response) 0) MS_PreAttachment_Ack 1) AuthRelay-EAP-Transfer 4) AuthRelay-EAP-Transfer 7) AuthRelay-EAP-Transfer 10) AuthRelay-EAP-Transfer 15) Key_Change_Directive 16) Key_Change_Directive_Ack 5) DER 6) DEA 11) DER 12) DEA 13) AuthRelay-EAP-Transfer
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 4-5 (Continued) Classification Description (12)~(16) When the EAP authentication is completed successfully, the ACR receives the Master Session Key (MSK) which is the prior key to provide the security and the Provisioned Policy on each subscriber via the DEA message from the AAA server. The ACR creates the AK from the MSK, and transmits the Key_Change_Directive message including the created AK Context information and the Security Association (SA) information of the MS to the RAS. In addition, the RAS relays EAP Success to the MS by using PKMv2-EAP-Transfer. (17)~(19) After the EAP authentication, the RAS verifies the AK key value which it has with MS, and transmits the SA-TEK-Challenge message to the MS to notify the start of the SA negotiation, and the MS verifies the CMAC of the SA-TEK-Challenge message, checks the AK key value, and transmits the SA negotiation information to the RAS by using SA-TEK-Request. The RAS transmits SA-TEK-Response including the AKID and the SA Descriptor which is the final result of the SA negotiation to the MS. (20)~(21) The MS requests the Traffic Encryption Key (TEK) to the RAS by using PKMv2 Key-Request, and the RAS creates the TEK randomly and transmits it to the MS by using the PKMv2 Key-Reply message. Then, the TEK is transmitted by being encrypted via the Key Encryption Key (KEK). Keys and Functions The functions of the keys are as follows. - MSK: creates the AK - AK: creates the CMAC key - KEK: encrypts the TEK - CMAC key: provides integrity for the MAC management message - TEK: encrypts traffics in wireless sections
CHAPTER 4. Message Flow 4-6 © SAMSUNG Electronics Co., Ltd. At the Time of Authenticator Relocation When the MS performs the CSN-anchored Handover (HO), or the Idle Mode MS moves to another ACR area and performs the location update, the following re-authentication procedure is performed to move the authenticator from the existing Serving ACR to the Target ACR. The Target ACR triggers in order that the MS performs the EAP authentication procedure with the AAA server again, and then, when the result of the authentication result is notified to the Serving ACR, the Authenticator Relocation procedure is completed. Figure 4.3 Authentication Procedure (At the time of the Authenticator Relocation) Classification Description (1)~(2) The new authenticator, T-ACR, exchanges the Relocation Notify/Ack message with the previous authenticator, S-ACR, to perform re-authentication and authenticator relocation. (3)~(11) The new authenticator, T-ACR, exchanges the Relocation Notify/Ack message with the previous authenticator, S-ACR, to perform re-authentication and authenticator relocation. (12)~(13) The RAS sends the Key Change Confirm message to the authenticator (T-ACR) to notify it that re-authentication is complete with the MS. (14)~(16) The T-ACR completes the authenticator relocation procedure by exchanging the Relocation Confirm/Ack message with the S-ACR. (17)~(18) After the authenticator relocation, the new authenticator notifies the anchor that the authenticator has been changed through the context Rpt procedure. MS T-RAS AAA T-ACR S-ACR 6) DEA 4) PKMv2-RSP 8) PKMv2-RSP 3) AuthRelay EAP Transfer 11) SA-TEK handshake 7) AuthRelay EAP Transfer 9) Key Change Directive 10) Key Change Directive Ack 12) Key Change Confirm 13) Key Change Confirm Ack 5) Serving ASN triggers MS re-authentication with AAA Server14) Relocation Complete_Req15) Relocation Complete_Rsp1) Relocation Notify 2) Relocation Notify Ack 17) Context_Rpt 18) Context_Ack 16) Relocation_Complete_Ack
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 4-7 4.1.3 Status Change Awake Mode Æ Idle Mode If the data traffic is not transmitted/received for a certain time, the status of MS is changed from the Awake Mode to the Idle Mode. Sleep Mode Æ Idle Mode Change The MS of the Sleep Mode is not changed into the Idle Mode, immediately. Before being changed from the Sleep Mode into the Idle Mode, the MS is changed to the Awake Mode, first, and then, after requesting DREG, it is changed into the Idle Mode. The deregistration procedure to be changed into the Idle Mode is divided into the MS-initiated Idle Mode change and the Network-initiated Idle Mode change, and the following indicates the procedure of the MS-initiated Idle Mode change. Figure 4.4 Awake Mode Æ Idle Mode Status Change Procedure Classification Description (1) When the MS is changed into the Idle Mode, it creates the DREG-REQ message and transmits it to the RAS, and the value of the De-Registration Request Code field is set as 0 x 01. (2)~(5) The RAS creates the IM_Entry_State_Change_Req message including the context information of the MS and transmits it to the ACR (Paging Controller), and the ACR creates the IM_Entry_State_Change_Rsp message including the Action Code (0 x 05), the paging information (PAGING_CYCLE, PAGING_OFFSET) and the Idle Mode Retain Flag and transmits the message to the RAS. The RAS transmits the DREG-CMD including the received information to the MS. MS RAS ACR 4) DREG-CMD 1) DREG-REQ 2) IM_Entry_State_Change_Req3) IM_Entry_State_Change_Rsp(ActionCode, Paging Controller ID, Paging Information) 6) Path_Dereg_Req 7) Path_Dereg_Rsp 8) Path_Dereg_Ack AAA 9) ACR 10) ACA 5) IM_Entry_State_Change_Ack(Code=0x01, Paging Cycle Request)
CHAPTER 4. Message Flow 4-8 © SAMSUNG Electronics Co., Ltd. (Continued) Classification Description (6)~(8) If the Network re-entry from the MS is not transmitted until the Idle Resource Retain timer expires, the RAS performs the Data Path (DP) Release procedure with the ACR. (9)~(10) As the MS status is changed to Idle Mode, the RAS notifies the charging termination message to the AAA server and updates the charging information in the AAA server. Awake Mode Æ Sleep Mode The Awake Mode and the Sleep Mode of the MS can be classified only by the RAS, and the ACR does not classify the two kinds of status, and recognizes and manages both of them as the Awake Mode. Figure 4.5 Awake Mode Q Sleep Mode Status Change Procedure Classification Description (1)~(2) If the MS does not transmit/receive the data for a certain time (set by the MS/RAS as the parameter), timeout is generated in its own timer, and thus the mode is changed from the Awake Mode to the Sleep Mode. Then, the MS transmits the MOB_SLP-REQ message to the RAS, and the RAS transmits the MOB_SLP-RSP message for this, and the status of MS is changed into the Sleep Mode. (3)~(4) If the terminating traffic exists in the Sleep Mode MS, the RAS transmits the MOB_TRF-IND message in the listening period of the corresponding MS, and the MS which receives this, sets the BW value as 0 in the UL BW Request and transmits it to the RAS. The RAS receives this message and recognizes that the status of MS has been changed into the Awake Mode, and transmits the traffic to the MS. MS RAS ACR 2) MOB_SLP-RSP 1) MOB_SLP-REQ Awake Sleep 3) MOB_TRF-IND 4) BW Request HeaderAwake DL Traffic
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 4-9 Idle Mode Æ Awake Mode (QCS) When an MS in Idle Mode responds for the paging because of incoming traffic or sends the traffic, the status of MS is changed from the Idle Mode into Awake Mode. In both cases, the MS should perform the network re-entry procedure to change the status into the Awake Mode and the Mobile WiMAX system of Samsung basically takes account of the QCS procedure as the network re-entry method. The following is the case where the mode is changed from the Idle Mode to the Awake Mode at the time of the network re-entry (QCS). Figure 4.6 Idle Mode Æ Awake Mode (QCS) Procedure Classification Description (1) If the Idle Mode MS is changed into the Awake Mode, the MS creates the RNG-REQ message including the MAC address and the Paging Controller ID value and transmits the message to the RAS. Then, the value of the Ranging Purpose Indication field is set as 0 x 00 (=Network Re-entry). (2)~(3) The RAS creates the IM Exit State Change Request message including the parameter of the received RNG-REQ message and transmits the message to the ACR. The ACR checks the status information of the Idle Mode of the MS, creates the IM Exit State Change Response message including the Idle Mode Retain information to perform the QCS procedure and the AK Context information for the CMAC authentication and transmits the message to the RAS. (4)~(5) The RAS transmits the Path Registration Request message including the data path (UL) information such as the GRE Key to the ACR to set the data path with the ACR. The ACR responds to the RAS as the Path Registration Response message including the data path (DL) information such as the GRE Key for this. (6) The RAS replies with the RNG-RSP message along with HO Optimization Flag for the QCS and relevant CID_Update and SA-TEK_Update information. (7)~(8) The RAS notifies the new CMAC_KEY_COUNT value updated by the MS to the ACR, which is an authenticator. 1) RNG-REQ 2) IM Exit State Change Request (PC ID, Ranging Purpose=0) 3) IM Exit State Change Response 4) Path Reg Request 5) Path Reg Response 9) Path Reg Ack 6) RNG-RSP (CID Update) 10) BW Request Header 11) ACR 12) ACA MS RAS ACR AAA7) CMAC_Key_Count_Update 8) CMAC_Key_Count_Update_Ack
CHAPTER 4. Message Flow 4-10 © SAMSUNG Electronics Co., Ltd. (Continued) Classification Description (9) The ACR receives the Path Registration Ack message and is notified of data path set results. (10) If an MS receives RNG-RSP, the MS transmits BW Request Header to notify the system that the status is changed into the Awake Mode. (11)~(12) As the mode is changed into the Awake Mode and new CID (Transport CID) is assigned, new charging start message is notified to update the charging information of the AAA server. Changing from Idle Mode to Awake Mode For the procedure that the MS status is changed from Idle Mode to Awake Mode due to paging, refer to ‘4.1.5’. 4.1.4 Location Update Inter-RAS Location Update The following is the location update procedure when the MS moves to other paging group in the same ACR. Figure 4.7 Inter-RAS Location Update Procedure Classification Description (1) When the Idle Mode MS in the paging group 1 moves to the paging group 2, it receives the PAG-ADV message and recognizes that the location has been changed. (2)~(3) The MS transmits the RNG-REQ message to a new RAS (RAS 2) including the MAC address, the Location Update Request, and the Paging Controller ID and the RAS 2 transmits the Location Update Request message to the ACR. RAS 1 (PG 1) ACR 1) MOB-PAG_ADV 5) RNG-RSP (Location Update Response) RAS 2(PG 2)1) MOB-PAG_ADV 2) RNG-REG (Location Update Request, Paging Controller ID) 3) LU Request 4) LU Response 6) CMAC_Key_Count_Update 7) CMAC_Key_Count_Update 8) LU Confirm Ack MS
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 4-11 (Continued) Classification Description (4)~(5) The ACR transmits the Location Update Response message including the paging information and the AK Context information to the RAS 2. The RAS 2 checks the CMAC validation and transmits the RNG-RSP message including the LU Response to the MS. (6)~(7) The RAS notifies the new CMAC_KEY_COUNT value updated by MS to the ACR, which is an authenticator. (8) The ACR transmits the LU Confirm message and notifies that the location update procedure is completed.
CHAPTER 4. Message Flow 4-12 © SAMSUNG Electronics Co., Ltd. Inter-ACR Location Update (Anchor Relocation) The following figure indicates the inter-ACR location update procedure when the MS moves to other ACR area. Figure 4.8 Inter-ACR Location Update Procedure S-ACR AAA HA1) RNG-REQ 40) MIP REG REQ 41) MIP REG RSP 44) MIP REG REQ T-ACR2) LU Request 3) LU Request5) LU Response 4) LU Response11) LU Confirm14) LU Confirm12) PC_relocation_Ind 13) PC_relocation_Ack 15) Relocation Notify 38) Anchor DPF HO Trigger 16) Relocation Notify Ack 39) Anchor DPF HO Request 17) MS Paging Announce20) Exit MS State Change Request19) RNG-REQ18) MOB_PAG-ADV 28) RNG-RSP (0b10 Enter Net.) (Event Code 0x01)23) IM Exit State 21) IM Exit State Change Req 22) IM Exit State Change Rsp 24) Path Reg Request 33) Path Reg Ack 27) Path Reg Response 26) Path Reg Response 25) Path Reg Request 37) Context Ack 36) Context Report (to DPF) 35) Re-authentication In PMIP caseIn CMIP case42) Agent Advertisement 43) MIP REG REQ 45) MIP REG RSP 46) CMIP REG RSP 47) Anchor DPF HO Response 48) ACR/AAA/HA Resource release action 6) RNG-RSP MS T-RAS Change Response 29) CMAC_Key_Count_Update32) CMAC_Key_Count_Update_Ack30) CMAC_Key_Count_Update 31) CMAC_Key_Count_Update_Ack 34) Path Reg Ack 7) CMAC_Key_Count_Update10) CMAC_Key_Count_update_Ack8) CMAC_Key_Count_Update 9) CMAC_Key_Count_update_Ack
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 4-13 Classification Description (1)~(2) If the paging group is changed, the MS transmits the RNG-REQ message including the MAC address, the Location Update Request and the Paging Controller ID to a new T-RAS (Target RAS). The T-RAS transmits the Location Update Request message including the Paging Controller ID to its own default ACR. (3)~(5) When the received Paging Controller ID does not belong to the Target ACR (T-ACR), the T-ACR transmits the Location Update Request message of which the APC Relocation Destination is set as its own Paging Controller ID to the previous Serving ACR (S-ACR) via the R4 interface to change the Paging Controller. The S-ACR responds by using the Location Update Response message including the information on whether to allow the Paging Controller Relocation and the Context information of the corresponding MS. (6) When the T-RAS receives the Location Update Response message, it sets as ‘LU Response=Success’, transmits the RNG-RSP message to the MS, and checks if the paging controller is changed into the T-ACR by transmitting the LU Confirm message. (7)~(10) The T-RAS notifies the new CMAC_KEY_COUNT value updated by the MS to the S-ACR, which is an authenticator. (11) The LU Confirm message is sent to confirm that the T-ACR is now the paging controller. (12)~(14) The T-ACR, after Location Update Confirm, notifies the FA and the Authenticator which are still located in the S-ACR of that the Paging Controller has been changed. (15) The T-ACR requests the FA Relocation for the MS to the S-ACR. (16)~(18) The S-ACR which receives the request of the FA/DPF Relocation from the T-ACR allows the relocation in the T-ACR, then, the T-ACR/RAS requests paging to the corresponding MS to trigger the relocation. (19)~(34) The MS which receives the MOB_PAG-ADV message performs the QCS which is the Network Re-Entry procedure with the network. (35)~(37) This is the procedure to relocate the Authenticator from the S-ACR to the T-ACR, the T-ACR triggers in order that the MS performs the EAP authentication procedure with the AAA server, and notifies the S-ACR of the authentication result, then completes the Authenticator Relocation procedure. (38)~(39) The T-ACR requests the Anchor DPF Relocation for the MS to the S-ACR. (40)~(41) If the MS uses the PMIP, the T-ACR instead of the MS registers the MIP to the HA. (42)~(46) If the MS uses the CMIP, the ACR operates only as the FA, and the MS registers the MIP in the HA directly. (47)~(48) When the anchor DPF relocation is completed successfully, S-ACR releases the existing connection with AAA and HA. Inter-ASN Location Update The inter-ASN location update procedure is the same with the inter-ACR location update procedure.
CHAPTER 4. Message Flow 4-14 © SAMSUNG Electronics Co., Ltd. 4.1.5 Paging Paging can be classified into the following two types. y The RAS broadcasts the MOB_PAG-ADV message periodically and notifies the MS of the corresponding paging group. The MS is changed into the Idle Mode and checks if the paging group of the MS is changed by checking the MOB_PAG-ADV message periodically based on the paging information (Paging Cycle, Paging Offset, PGID) received from the system. y If the traffic to be transmitted to the Idle Mode MS exists in the ACR, the ACR triggers the MOB_PAG-ADV message to the RAS to change the corresponding MS into the Awake Mode. The following figure is the procedure to perform paging on the Idle Mode MS. Figure 4.9 Paging Procedure Classification Description (1)~(2) When receiving the packet to be transmitted to the specific MS, the ACR transmits the MS Paging Announce message including the MAC address, the Paging Group ID and the Action Code (0x10) of the MS when the corresponding MS is the Idle Mode to the RAS. The RAS transmits the MOB_PAG-ADV message including the information received from the ACR to the MS. After this, the MS performs the QCS procedure with the network. For the information on the QCS procedure, see the procedure of ‘Idle Mode Æ Awake Mode’ in ‘4.1.3’. MS RAS ACR 1) MS Paging Announcement 2) MOB PAG-ADV QCS Incoming traffic
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 4-15 4.1.6 Handover Inter-RAS Handover The following is the inter-RAS handover procedure. Figure 4.10 Inter-RAS Handover Procedure 25) Path Reg Response 24) Path Reg Request 21) Path Reg Ack 1) MOB-MSHO-REQ 2) HO-Request 3) HO-Request 4) HO-Response5) HO-Response7) HO-Ack 9) MOB-HO-IND 10) HO-Confirm12) Context-Request13) Context-Report14) HO-Ack 15) HO-Ack 23) RNG-REQ 26) RNG-RSP 31) MAC PDU with SN Report Header (Opt.) or BW Request with 0 (Opt.) 32) HO-Complete 33) HO-Complete 36) Path De-Reg Request37) Path De-Reg Response6) MOB-BSHO-RSP 8) HO-Ack 11) HO-Confirm16) Path Pre-Reg Request19) Path Reg Request (For Data Integrity)20) Path Reg Response 17) Path Pre-Reg Response18) Path Pre-Reg Ack 30) Path De-Reg Response28) Path De-Reg Request29) Path De-Reg Response22) Fast Ranging IE () 34) CMAC_KEY_COUNT Update35) CMAC_KEY_COUNT Update Ack38) Path De-Reg Ack27) Path De-Reg Request (For Data Integrity) MS S-RAS T-RAS1 T-RAS2ACR
CHAPTER 4. Message Flow 4-16 © SAMSUNG Electronics Co., Ltd. Classification Description (1)~(3) The MS transmits the MOB_MSHO-REQ message including the Neighbor BS (RAS) ID and the parameter related to handover to the current Serving RAS (S-RAS) to request handover. The S-RAS transmits the HO-Request message including the received MOB_MSHO-REQ parameter and the context information to the ACR, and the ACR forwards the HO-Request message to the Target RAS (T-RAS). (4)~(8) The T-RAS transmits the HO-Response message including its own capability information to the ACR, and the S-RAS transmits the MOB_BSHO-RSP message including the Recommended Neighbor BS-IDs, the HO-ID and the parameter result value to the MS. (9)~(11) The MS transmits the MOB_HO-IND message including the HO-IND Type and the Target BS-ID to the S-RAS to notify handover finally, and the S-RAS transmits the HO-Confirm message including the context information and the Data Integrity information (e.g., Buffered SDU SN) of the MS to the T-RAS. (12)~(15) The T-RAS transmits the Context-Request message to the ACR (Authenticator) to request the AK Context information, and the ACR responds by using the Context-Response message including the AK context information. (16)~(21) The path pre-registration is executed to set a new data path between the ACR and the T-RAS. In addition, a forwarding path is set to send to the T-RAS the traffics that the S-RAS has not yet transmitted to the MS, and the traffics are sent to the T-RAS. (22) If T-RAS allows the request of an MS, the T-RAS notifies UL_MAP IE to enable the MS to transmit HO Ranging Request via uplink. (23) The MS transmits to the T-RAS the RNG-REQ message that contains the MAC address, Serving BS-ID, HO indication, and HO-ID. (24)~(25) The path registration procedure is executed to exchange the SF information that is mapped with the data path created between the ACR and the T-RAS through the steps (16)~(18). (26) The T-RAS replies with the RNG-RSP message along with HO Optimization Flag, CID_Update, and SA-TEK_Update. (27)~(30) If the S-RAS transmits all the traffic to the T-RAS, the forwarding path is removed. (31) If an MS successfully receives the RNG-RAS message, the MS transmits Bandwidth Request (BR) MAC PDU to RAS to inform the reception of the message. (32)~(33) The T-RAS transmits the HO-Complete message to S-RAS to notify the completion of handover. (34)~(35) The RAS notifies the new CMAC_KEY_COUNT value updated by MS to the ACR, which is an authenticator. (36)~(38) When the handover procedure is completed, the old path between the S-RAS and the ACR is removed. Inter-ACR Handover Inter-ACR handover within the same ASN considers the path extension via the R6 interface. The inter-ACR handover procedure is the same with the inter-RAS handover procedure, but data forwarding between the serving RAS and the target RAS is not supported.
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 4-17 Inter-ASN Handover: ASN-Anchored Mobility Inter-ASN handover is divided into the ASN-anchored mobility method via the R4 interface and the CSN-anchored mobility method via the R3/R4 interface. The following figure indicates the inter-ASN handover procedure of the ASN-anchored mobility method, the Serving ACR (S-ACR) performs the anchor function. Figure 4.11 Inter-ASN Handover (ASN-Anchored Mobility) The HO signaling procedure is the same with the inter-RAS handover procedure, however in the HO signaling procedure, the procedure of exchanging the HO signaling message via the R4 interface is added between the S-ACR and the Target ACR (T-ACR). 35) Path Reg Ack 33) Path Reg ResponseMS S-RAS T-ACR T-RAS1 T-RAS21) MOB-MSHO-REQ S-ACRAK Context Transfer 2) HO-Request 3) HO-Request 4) HO-Request 5) HO-Response 6) HO-Response7) HO-Response8) MOB-BSHO-RSP 9) HO-Ack 10) HO-Ack 11) HO-Ack 12) MOB-HO-IND 13) HO-Confirm 14) HO-Confirm15) HO-Confirm 18) Context-Request 17) Context-Request 19) Context-Report 20) Context-Report 22) HO-Ack 21) HO-Ack 23) HO-Ack R4 Data Path Setup 25) Path Pre-Reg Request 24) Path Pre-Reg Request 26) Path Pre-Reg Response27) Path Pre-Reg Response 29) Path Pre-Reg Ack 28) Path Pre-Reg Ack 16) Fast Ranging IE ()30) RNG-REQ 37) RNG-RSP 38) MAC PDU with SN Report Header (Opt.) or BW Request with 0 (Opt.) 40) HO-Complete 39) HO-Complete 41) HO-Complete 46) Path De-Reg Request47) Path De-Reg Response42) CMAC_COUNT_UPDATE 45) CMAC_COUNT_UPDATE Ack 43) CMAC_COUNT_UPDATE 44) CMAC_COUNT_UPDATE Ack 32) Path Reg Request36) Path Reg Ack 31) Path Reg Request 34) Path Reg Response
CHAPTER 4. Message Flow 4-18 © SAMSUNG Electronics Co., Ltd. Inter-ASN Handover: CSN-Anchored Mobility The following is handover of the CSN-anchored mobility method among the types of inter-ASN handover, the anchor function is relocated from the Serving ACR (S-ACR) to the Target ACR (T-ACR). CSN-anchored mobility is composed of the process that Authenticator/DPF Anchor is relocated to the target ACR after ASN-anchored mobility handover is performed. For convenience, the case that T-ACR triggers the relocation is defined in pull mode and the other case that S-ACR triggers is in push mode. Mobile WiMAX system of Samsung supports both pull mode and push mode. The CSN-anchored mobility method follows the MIP standard, and the NWG defines the PMIP and the CMIP for the MIP method. The first part of the CSN-anchored handover signaling process is the same as the procedure of ASN-anchored mobility handover and the procedure after the ASN-anchored handover is as follows: Figure 4.12 Inter-ASN Handover (CSN-Anchored Mobility) MS T-RAS HAT-ACR S-ACR(Anchor) AAA Inter-ASN HHO PMIP Re-registration1) Relocation Notify 2) Relocation Notify Ack 3) Relocation Request 4) Relocation Response Pull Model Push Model 6) Anchor DPF HO Trigger7) Anchor DPF HO Request8) MIP REG REQ 9) MIP REG RSP 12) MIP REG REQ 13) MIP REG RSP CMIP Re-registration 10) Agent Advertisement 11) CMIP REG REQ 14) CMIP REG RSP 15) Anchor DPF HO Response 20) STR 21) STA Pull Mode 5) Re-authentication 16) Registration Revocation Request 17) Registration Revocation Ack 18) ACR 19) ACA
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 4-19 Classification Description (1)~(5) This is the procedure to relocate the Authenticator from the S-ACR to the T-ACR, the T-ACR triggers in order that the MS performs the EAP authentication procedure with the AAA server again. The T-ACR completes the Authenticator Relocation procedure by notifying the S-RAS of the authentication result. (6)~(15) FA relocation is triggered, and the registration of the PMIP or the CMIP is processed.(16)~(17) The S-ACR cancels the S-ACR registration of the MS in the HA. (18)~(21) The S-ACR updates the information on interworking with the AAA server and the final accounting information of MS. Diameter is applied to AAA protocol, S-ACR performs the session termination procedure. 4.1.7 Access Termination Access Termination (Awake Mode) The following is the procedure that the access is terminated because the power of the Awake Mode MS is turned off. Figure 4.13 Access Termination (Awake Mode) MS RAS ACR AAA 1) DREG-REQ (ReqCode: 0) 3) Path Deregistration Request 7) ACR 2) DREG-CMD (ActionCode: 4) (Power Down Indication) 8) ACA 5) Path Deregistration Response 6) Path Deregistration Ack 9) STR 10) STA HA 4) MIP release
CHAPTER 4. Message Flow 4-20 © SAMSUNG Electronics Co., Ltd. Classification Description (1)~(3) If the power of the Awake Mode MS is turned off, the MS transmits the DREG-REQ message including ‘Deregistration code=0’ to the RAS, and the RAS notifies the ACR of this. (4) ACR release the MIP related information with HA. (5)~(6) The ACR notifies the RAS of the result of power down processing, and release the data path. (7)~(10) The S-ACR updates the information on interworking with the AAA server and the final accounting information of MS. Diameter is applied to AAA protocol, S-ACR performs the session termination procedure. Access Termination (Idle Mode) The following is the procedure that the access is terminated because the power of the Idle Mode MS is turned off. Figure 4.14 Access Termination (Idle Mode) Classification Description (1)~(5) If the power of the Idle Mode MS is turned off, the MS transmits the RNG-REQ message including the Power Down Indicator to the RAS, and the RAS notifies the ACR of this. The ACR deletes the information of the MS. (6) ACR release the MIP related information with HA. (7)~(8) Diameter is applied to AAA protocol, S-ACR performs the session termination procedure. MS RAS ACR1) RNG-REQ (Location Update Request, Paging Controller ID) 2) LU Request 4) RNG-RSP (Location Update Response) 3) LU Response 5) LU Confirm AAA 7) STR 8) STA HA 6) MIP release
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 4-21 4.2 Network Synchronization Message Flow The SPI-2213 uses GPS for the system synchronization. The UCCM of the MMA-G, which is the GPS reception module, creates the clock with the clock information received from a GPS and then distributes the clock to each hardware module in the SPI-2213. Clock information required by the RRH is sent from the MRA-F through ‘Digital I/Q and C & M’, and the RRH recovers clock information from the signals to create necessary clocks. Figure 4.15 Network Synchronization Flow of SPI-2213 MMA-G(UCCM) MBB-F D A CCC BBB 1Port M E I - B MMA- GMRA - F # 0 MRA - F # 1 MRA - F # 2 MRA - F # 3 MRA - F # 4 M R A - F # 5 R R H (0)R R H (1)R R H (2) A DBCSystem Clock(56 MHz)61.44 MHz PP2S 40.96 S 80 msec TDD signal Digital I/Q and C & M Analog 10 MHz
CHAPTER 4. Message Flow 4-22 © SAMSUNG Electronics Co., Ltd. 4.3 Alarm Signal Flow The detection of failures in the SPI-2213 can be implemented by hardware interrupt or software polling method. The failures generated in the SPI-2213 are reported to the management system via the SNMP trap message. Failure Alarm Types y System Failure Alarms Time Sync Fail, Fan Fail, Temperature High, etc. y Board Failure Alarms − Hardware Failure Alarms: FUNCTION FAIL, BOARD DELETION, etc. − Software Failure Alarms: COMMUNICATION FAIL, PORT DOWN, CPU OVERLOAD, etc. y RRH Failure Alarms LOW GAIN, OVER POWER, VSWR FAIL, PLL UNLOCK, RRH INTERFACE FAIL etc. y UDA 6 alarm input ports are supported for the rectifier alarm. Main AC Fail, Rectifier Fail, Battery Fail, Cabinet Fan Fail, Heater Fail, Environment Alarm Failure Report Message Flow The main OAM (UFM) collects the failures detected from each board and UDA interface of the SPI-2213 and notifies them to the management system. At this time, it only reports the upper failure information by using the failure filtering function. If it receives the command to inhibit the report for a specific failure or all system failures from the management system, it does not report the failure report. The flows for the failure detection and the report message are as shown in the figures below: Figure 4.16 Alarm Signal Flow of SPI-2213 SPI-2213 MMA-G MRA-F #0~5 MEI-B RRH-2 #0~2 Alarm detection Alarm filtering Alarm Report (SNMP trap) Alarm detection Alarm filtering Alarm Report (SNMP trap) SPI-2213 MMA-G MRA-F #0~5 MEI-B RRH-2 #0~2 Alarm detection Alarm filtering Alarm Report (SNMP trap) WSM (SNMP Manage)
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 4-23 Figure 4.17 Alarm and Control Structure of SPI-2213 MBB-F MEI - BMR A - F (0)R R H (0)R R H (1)R R H (2) MMA-GA MR A - F (1)MR A - F (2)MR A - F (3)MR A - F (4)M R A - F (5) F A N - F D 48 D C UDAB A B CDFunction Fail/DEL Reset Function Fail/DEL/Reset Fan fail/High Temp.
CHAPTER 4. Message Flow 4-24 © SAMSUNG Electronics Co., Ltd. 4.4 Loading Message Flow Loading is the procedure to download the software execution files and the data from the IS, which are required to perform each function of each processor and each device of the SPI-2213. Loading the SPI-2213 is performed in the procedure of initializing the system. In addition, if a specific board is mounted on the system or the hardware is reset, or if the operator of the upper management system reboots a specific board, loading is performed. Loading is classified into two types, one is loading by using its own non-volatile storage and the other is loading by using the remote IS. When the system is initialized for the first time, the SPI-2213 receives the loading by using the remote IS, and after this, saves the corresponding information in the internal storage, and backs up the recent information periodically, and then it is available to avoid unnecessary loading. After the first initialization, if the information saved in its own storage is the recent information by comparing the version, the SPI-2213 does not receive the remote loading. The loaded information includes the software image which is configured with the execution file and the script file, the configuration information, the PLD related to the operation parameter and various configuration files. Among them, all the information required for the static routing function of the SPI-2213 is saved in its own storage as the startup configure file format, and provides the information required at the time of the initialization. Loading Procedure To perform the loading procedure when initializing the SPI-2213, the loader performs the followings first. (Pre-loading) y Boot-up The booter of the Flash ROM loads the kernel and the Root File System (RFS) from the flash ROM to the RAM Disk, and performs the kernel. The DPSA, which uses the Intel CPU, loads the kernel and the RFS from the Disk On Chip (DOC) to the RAM Disk via ROM BIOS booting and performs the kernel. y IP configuration The IP address information is acquired from the flash ROM and is set to communicate with the first upper management system. y Registration The NE is registered to the RS, and the IP address of the IS is acquired during the registration. y Version Comparison The version of the software image and the version of the PLD saved in the remote IS and in the internal storage are compared, and the location where to perform loading is determined from that. y File List Download The list of the files to be loaded is downloaded for each board.
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. 4-25 Loading Message Flow After performing the pre-loading procedure, if the method of loading is determined, the Main OAM (ULM) of the MMA-G which performs the operation and the maintenance of the entire SPI-2213 performs loading by using the FTP/SFTP to the corresponding IS (remote ID or its own storage). Then, the Main OAM (ULM) becomes the internal image server for the lower board and performs the loading procedure. The information on the software loaded in the SPI-2213 can be checked in the upper management system. The loading message flow is as the following figure: Figure 4.18 Loading Message Flow SPI-2213 MRA-F MMA-G SPI-2213 MRA-F MMA-G • • • •WSM (RS/IS)Registration Image Loading RS/IS Registration Image Loading RS/IS Non-volatileStorage Non-volatileStorage
CHAPTER 4. Message Flow 4-26 © SAMSUNG Electronics Co., Ltd. • • • •WSM (SNMP Manager) Web-EMT (HTTP Client)/IMISH MRA-F MMA-GHTTP ServerSNMP CLIM SNMP get/set/get_next/get_bulk, SNMP trap HTTP message (command/response) CLI Command Statistical Data SPI-2213 4.5 Operation and Maintenance Message Flow An operator can check and change the status of the SPI-2213 by means of the management system. To this end, the SPI-2213 provides the SNMP agent function. The function enables the WSM operator to perform the operation and maintenance function of the SPI-2213 at remote site by using the SNMP. In addition, the operator can perform Web-EMT based maintenance function by using a Web browser in a console terminal or IMISH based maintenance function by using the SSH connection. However, grow/degrow, paging information change and neighbor list change functions are only available on WSM. The statistical information provided by the SPI-2213 are provided to the operator according to collection period and the real-time monitoring function for a specific statistical item specified by the operator is, also, provided. Operation and Maintenance Message Flow The operation and maintenance of the SPI-2213 is carried out via the SNMP get/get_next/ get_bulk/set/trap message between the SNMP agent on the main OAM and the SNMP manager of the WSM. The SPI-2213 deals with various operation and maintenance messages received from the SNMP manager of the management system, transfers the results and reports the events, such as failure generation or status change, in real time as applicable. The statistical information is provided as statistical file format in unit of BI and the collection period can be specified as one of 15, 30 and 60 minutes. The OAM signal flow is as shown in the figure below: Figure 4.19 Operation and Maintenance Signal Flow
Mobile WiMAX RAS SPI-2213 System Description © SAMSUNG Electronics Co., Ltd. 5-1 CHAPTER 5. Additional Functions and Tools 5.1 RET The SPI-2213 can support the RET function by connecting an antenna with an AISG 2.0 interface and an RRH with an AISG 2.0 interface. To provide the RET function, the SPI-2213 sends and receives control messages to and from the WSM through the RET controller within the RRH(AISG2.0 interface), MRA-F(Digital I/Q and C & M: Optic) and RET controller of MMA-G. By using this path, the WSM can carry out the RET function that controls the antenna tilting angle remotely. In addition, for the RET operation, the RRH provides power to every antenna connected to it. Figure 5.1 RET Interface DU MMA-G WSM(SNMP Manager) MRA-F #0 MRA-F #1 MRA-F #5 . . . RET Relay RRH#0RRH#1RRH#2Digital I/Q and C & M Antenna (RET Motor) Antenna (RET Motor) Antenna (RET Motor) Antenna (RET Motor) Antenna (RET Motor) Antenna (RET Motor) Antenna (AISG interface)RS-485and Power SPI-2213 RET Relay RET Relay RET Controller
CHAPTER 5. Additional Functions and Tools 5-2 © SAMSUNG Electronics Co., Ltd. 5.2 Web-EMT The Web-EMT is a type of GUI-based consol terminals and the tool to access the SPI-2213 directly, monitor the device status and perform operation and maintenance. An operator can execute the Web-EMT only with Internet Explorer and the installation of additional software is not necessary. In addition, GUI is provided in HTTPs protocol type internally. Figure 5.2 Web-EMT Interface The Web-EMT enables the operator to restart the SPI-2213 or internal boards, inquire/set configuration and operation parameters, carry out status and failure monitoring and perform the diagnosis function. However, the functions for resource grow/degrow or the changes of the operation information concerned with neighbor list are only available on the WSM managing the entire network and the loading image. SPI-2213 MRA-F SPI-2213 MRA-F• • •Web-EMT MMA-G MMA-G HTTP Server HTTP Server HTTP message HTTP messageOAM command/response OAM command/response
Mobile WiMAX RAS SPI-2213 System Description © SAMSUNG Electronics Co., Ltd. I ABBREVIATION A AAA Authentication, Authorization, and Accounting ACR Access Control Router ADC Analog to Digital Conversion AGC Automatic Gain Control AISG Antenna Interface Standards Group AMC Adaptive Modulation and Coding API Application Programming Interface ARQ Automatic Repeat request ASN Access Service Network B BI Bucket Interval BP Board Processor C C & M Control & Management CAC Call Admission Control CC Call Control CID Connection Identifier CLEI Common Language Equipment Identifier CLIM Command Line Interface Management CLLI Common Language Location Identifier CMIP Client Mobile IP CoS Class of Service CSN Connectivity Service Network CTC Convolutional Turbo Code
ABBREVIATION II © SAMSUNG Electronics Co., Ltd. D DAM Diameter AAA Management DCD Downlink Channel Descriptor DD Device Driver DHCP Dynamic Host Configuration Protocol DL Downlink DL-MAP Downlink-MAP DMB Digital Main Block DPM-FI DC Power Module-Flexible Indoor DST Daylight Saving Time E E/O Electrical to Optic EAP Extensible Authentication Protocol EMI Electro-Magnetic Interference EMI EMS Interface EMS Element Management System F FA Foreign Agent FA Frequency Allocation FAN-FD48 FAN-Flexible Digital unit -48 VDC FE Fast Ethernet FEC Forward Error Correction FFT Fast Fourier Transform FRP Frequency Reuse Pattern G GBIC Gigabit Interface Converter GE Gigabit Ethernet GPS Global Positioning System GPSR GPS Receiver GRE Generic Routing Encryption GUI Graphical User Interface H HA Home Agent H-ARQ Hybrid-Automatic Repeat request HO Handover HTTPs Hypertext Transfer Protocol over SSL
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. III I IEEE Institute of Electrical and Electronics Engineers IMISH Integrated Management Interface Shell IP Internet Protocol IPRS IP Routing Software IS Image Server M MAC Medium Access Control MBB-F Mobile WiMAX base station Backplane Board-Flexible MEI-B Mobile WiMAX base station External Interface board assembly- Basic MIMO Multiple Input Multiple Output MIP Mobile IP MLPPP Multi Link Point to Point Protocol MMA-G Mobile WiMAX base station Main control board Assembly-General MRA-F Mobile WiMAX base station RAS board Assembly-Flexible MS Mobile Station MW Middleware N NE Network Element NP Network Processor NPS Network Processor Software NWG Network Working Group O O/E Optic to Electrical OAGS Common SNMP Agent Subagent OAM Operation And Maintenance OCM Common Configuration Management OER Common Event Router OFDMA Orthogonal Frequency Division Multiple Access OPM Common Performance Management OS Operating System OSSM Common Subscription Service Management
ABBREVIATION IV © SAMSUNG Electronics Co., Ltd. P PBA Panel Board Assembly PCB Printed Circuit Board PCRF Policy & Charging Rules Function PDU Protocol Data Unit PF Proportional Fair PGID Paging Cycle, Paging Offset PHY Physical Layer PLD Programmable Loading Data PMIP Proxy Mobile IP PP2S Pulse Per 2 Seconds PPP Point to Point Protocol Q QAM Quadrature Amplifier Modulation QCS Quick Connection Setup QoS Quality of Service R RAS Radio Access Station RDM RAS Diagnosis Management RFS Root File System ROHC Robust Header Compression RRC RAS Resource Controller RRH Mobile WiMAX base station Remote Radio Head RS Registration Server RSC RAS Service Controller RSSI Received Signal Strength Indicator RTC RAS Traffic Controller S SAE System Architecture Evolution SBC Subscriber Station Basic Capacity SDU Service Data Unit SFF Small Form Factor Fixed SFP Small Form Factor Pluggable SFTP Secure File Transfer Protocol SMFS-F-C Samsung Mobile WiMAX U-RAS Flexible Shelf assembly-Center mount SMFS-F-F Samsung Mobile WiMAX U-RAS Flexible Shelf assembly-Front mount SNMP Simple Network Management Protocol SNMPD SNMP Daemon SSH Secure Shell SSL Secure Sockets Layer
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. V T TCA Threshold Cross Alert TDD Time Division Duplex U UCCM Universal Core Clock Module UCD Uplink Channel Descriptor UDA User Defined Alarm UDE User Define Ethernet UDP User Datagram Protocol UFM Common Fault Management UL Uplink UL-MAP Uplink-MAP ULM Universal Loading Management V VIF Virtual Interface VLAN Virtual Local Area Network W Web-EMT Web-based Element Maintenance Terminal WLAN Wireless Local Area Network WSM Mobile WiMAX System Manager
ABBREVIATION VI © SAMSUNG Electronics Co., Ltd. This page is intentionally left blank.
Mobile WiMAX RAS SPI-2213 System Description © SAMSUNG Electronics Co., Ltd. I INDEX A AAA server.................................... 1-5 Access Termination .................... 4-19 ACR .....................................1-5, 2-16 Alarm ...................................3-5, 4-22 Altitude........................................ 2-12 ARQ ..............................................2-7 ASN-GW ....................................... 1-2 Authentication......................2-10, 4-4 Awake Mode........................4-7, 4-19 B Backboard..................................... 3-5 BI ................................................4-26 Board OAM................................. 3-20 Boot-up ....................................... 4-24 BS ................................................. 1-2 C CAC .............................................. 2-7 Call processing ......................2-6, 4-1 Call Trace.................................... 2-10 Capacity...................................... 2-11 CC overview..............................3-16, 3-17 structure....................................... 3-17 Channel Bandwidth .................... 2-11 Channel Card ............................. 2-11 CID................................................ 2-6 CLIM ........................................... 3-24 Clock....................................3-5, 4-21 Collaborative SM .......................... 2-6 Console Terminal.......................... 2-9 Contention Based Bandwidth Request ........................................ 2-4 Cooling Structure ........................ 3-13 CSM.............................................. 2-3 D Decoding ...................................... 2-4 Demodulation ............................... 2-4 Device Driver .............................. 3-15 DL/UL MAP................................... 2-5 DMB.............................................. 3-4 DPM-FI ....................................... 3-11 DU configuration.................................. 3-1 cooling structure .......................... 3-13 external interface......................... 3-14 overview ........................................ 2-2 Dual Stack .................................... 2-8 E EMI ............................................. 3-20 Encoding....................................... 2-4 Environmental Alarm .................. 2-13 Environmental Condition ............ 2-12 Ethernet CoS ................................ 2-9 Ethernet interface ................2-18, 3-5
INDEX II © SAMSUNG Electronics Co., Ltd. F FAN-FD48...................................3-13 FFT ............................................. 2-11 FRP...............................................2-3 G GPSR..........................................2-13 H HA.................................................1-5 Handover message flow .............................. 4-15 overview ................................. 1-7, 2-6 H-ARQ ..........................................2-5 Holdover .......................................3-6 Humidity Condition......................2-12 I Idle Mode ..................... 2-6, 4-7, 4-20 IMISH..........................................2-10 Initial Access .................................4-1 Input Power................................. 2-11 Input Voltage............................... 2-11 Interface......................................2-16 IP QoS ..........................................2-8 IP Routing .....................................2-8 IPRS............................................3-16 IS.................................................4-24 L Link aggregation .........................2-18 Loader.........................................3-27 Loading ..............................4-24, 4-25 Location update ..........................4-10 Loopback Test...............................2-3 M MAC ARQ ..................................... 2-7 Main OAM................................... 3-20 Matrix A.........................................2-5 Matrix B......................................... 2-5 MBB-F...........................................3-5 MEI-B detailed information........................3-7 overview.........................................3-5 Middleware ................................. 3-15 MIMO .....................................2-5, 3-5 external interface..........................3-14 MMA-G detailed information........................3-6 overview.........................................3-5 Mobile communication..................1-1 Mobile WiMAX network ..........................................1-4 standard .........................................1-2 system function ..............................1-6 Modulation .................................... 2-4 MRA-F detailed information........................3-7 overview.........................................3-5 MS ..............................................2-16 N NAT ............................................... 2-8 Network Synchronization............4-21 Noise...........................................2-12 NPS ............................................3-16 O OAGS .........................................3-22 OAM interface .......................................3-20 overview............................. 3-16, 3-19 structure .......................................3-19
Mobile WiMAX RAS SPI-2213 System Description/Ed.00 © SAMSUNG Electronics Co., Ltd. III OCM ...........................................3-33 OER ............................................ 3-32 OEV ............................................ 3-32 OFDMA.......................... 2-2, 2-4, 3-5 Operation and Maintenance .......4-26 OPM............................................ 3-30 OS............................................... 3-15 OSSM ......................................... 3-31 Output ......................................... 2-11 P Paging......................................... 4-14 PAM ............................................ 3-25 PCRF server................................. 1-5 Power Control...................... 2-5, 2-11 Power Structure .......................... 3-12 Pre-loading ........................3-27, 4-24 Protocol Stack.............................2-17 Q QAM symbol ................................. 2-5 QCS .............................................. 4-9 QoS........................................2-7, 2-8 R R1 interface ................................ 2-17 R6 interface ................................ 2-17 Ranging ........................................ 2-4 RAS .............................................. 1-4 RDM............................................ 3-34 Remote Firmware Downloading ... 2-3 RET............................................... 5-1 RF Band...................................... 2-11 RF Specification.......................... 2-13 RRC ............................................ 3-17 RRH alarm ........................................... 4-22 configuration.................................. 3-2 cooling structure .......................... 3-13 main function ................................. 3-7 network configuration .................... 3-9 overview ........................................ 2-2 RRH-1 external interface......................... 3-14 network configuration ........... 3-9, 3-10 RRH-2 overview ........................................ 3-8 RSC ...................................3-17, 3-18 RTC ...................................3-17, 3-18 S Sleep Mode status...................................... 2-6, 4-8 SM .........................................2-3, 2-5 SMFS-F ...................................... 2-14 SNMP agent ............................... 4-26 SNMP manager .......................... 4-26 SNMPD....................................... 3-21 Software Upgrade....................... 2-10 SPI-2213 configuration....................... 2-14, 2-15 interface.............................. 2-16, 3-14 internal configuration ..................... 3-3 introduction.................................... 2-1 software....................................... 3-15 Status Change .............................. 4-7 STC........................................2-3, 2-5 Subchannelization ........................ 2-5 T Temperature Condition ............... 2-12
INDEX IV © SAMSUNG Electronics Co., Ltd. U UCCM ..................................3-6, 4-21 UDA ..............................................3-5 UDE ..............................................3-5 UFM ............................................3-26 ULM ............................................3-28 Uplink Timing Synchronization .....2-4 V Vibration......................................2-12 VLAN.............................................2-9 W Web-EMT..................... 2-10, 3-6, 5-2 WebEMT.....................................3-23 WLAN............................................1-1 WSM .......................... 1-5, 2-16, 4-26
Mobile WiMAX RAS SPI-2213 System Description ©2009 Samsung Electronics Co., Ltd. All rights reserved. Information in this manual is proprietary to SAMSUNG Electronics Co., Ltd. No information contained here may be copied, translated, transcribed or duplicated by any form without the prior written consent of SAMSUNG. Information in this manual is subject to change without notice.

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