Wireless Matrix MBS2A Mobile base station with L-Band Sat, GSM and WLAN User Manual Style Guide

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Date Submitted	2004-04-02 00:00:00
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Wireless Matrix
MBS2 User Guide
Wireless Matrix Corporation
12369-B Sunrise Valley Drive, Reston, VA 20191
Phone : (703) 262-0500
FAX : (703) 262-0380
www.wirelessmatrixcorp.com
Document MBUD-0086v1b
Version 1.0b
March 4, 2004
Wireless Matrix MBS2 User Guide
Document MBUD-0086v1b
MBS2 User Guide
Copyright © 2004 Wireless Matrix Corporation. All rights reserved.
Printed in the United States of America
This document is proprietary to Wireless Matrix Corporation. Do not reproduce, use or disclose
without permission.
We have made every effort to ensure the accuracy of all information contained in this document.
However, Wireless Matrix Corporation makes no expressed or implied warranty or representation
based upon the enclosed information.
Revision History:
Version 0.5
Version 0.9
Version 1.0b
March 04, 2004
2/03/04
3/01/04
3/04/04
Initial Draft
Final Draft
Initial Version
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Wireless Matrix MBS2 User Guide
Document MBUD-0086v1b
MBS2 User Guide
TABLE OF CONTENTS
INTRODUCTION............................................................................................................. 4
TECHNICAL SUPPORT .................................................................................................................................. 4
REGULATORY STATEMENTS ........................................................................................................................ 4
OTHER SAFETY PRECAUTIONS .................................................................................................................... 5
GENERAL DESCRIPTION ............................................................................................ 6
MBS2 UNIT ................................................................................................................................................ 6
WAW NETWORK ........................................................................................................................................ 7
COMPONENTS................................................................................................................ 8
COMMAND SERVER ..................................................................................................................................... 8
SATELLITE MODEM ..................................................................................................................................... 9
GPRS MODEM ............................................................................................................................................ 9
802.11B MODEM ......................................................................................................................................... 9
GPS RECEIVER............................................................................................................................................ 9
KEYFOB RECEIVER .................................................................................................................................... 10
FEATURES ..................................................................................................................... 10
MULTI-NETWORK ROUTING ...................................................................................................................... 10
ACTIVE NETWORK (AN) DETERMINATION ............................................................................................... 10
MAGIC PACKET ......................................................................................................................................... 10
IN-YARD ACCESS ...................................................................................................................................... 10
WIRELESS DHCP (WDHCP) .................................................................................................................... 11
INTERNET PROTOCOLS SUPPORT ............................................................................................................... 12
USER APPLICATIONS ................................................................................................................................. 12
ALERT AND PERSONAL ALERT .................................................................................................................. 12
MISCELLANEOUS ....................................................................................................... 12
ADDRESSING ............................................................................................................................................. 12
THROUGHPUT ............................................................................................................................................ 12
TOOLS ....................................................................................................................................................... 13
INSTALLATION OVERVIEW .................................................................................... 13
INSTALLATION .......................................................................................................................................... 13
MBS2 OPERATION .................................................................................................................................... 14
EQUIPMENT FAILURE OR DAMAGE ............................................................................................................ 14
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MBS2 User Guide
INTRODUCTION
This guide explains procedures for using the Wireless Matrix Mobile Base Station 2 (MBS2) modem as
installed on a vehicle for data communications.
Technical Support
Technical questions should be directed to the Customer Care team at (866) 456-7522.
Regulatory Statements
The following regulatory approvals apply for the Mobile Base Station 2 (MBS2):
•
FCC
•
IC
•
PTCRB
FCC Part 15 Compliance
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
1. This device may not cause harmful interference
2. This device must accept any interference received, including interference that may cause
undesired operation.
Modifications not expressly approved by Wireless Matrix USA, Inc. could void the user's authority
to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
•
•
•
•
March 04, 2004
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
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The MBS2 satellite radio emits radio frequency (RF) energy when transmitting. The MBS2 must
be installed in a manner that provides a minimum separation distance of 20 cm or more between
the antenna and persons to satisfy FCC RF exposure requirements for mobile transmitting
devices.
Operators should maintain a safe distance from radio when transmitting. Wireless Matrix
recommends installing the MBS2 device with a safe distance of 51 cm or more. The safe
distance of 51 cm is measured from the center of the antenna beam with respect to the FCC OET
Bulletin 65, Edition 97 01 “Evaluating Compliance With FCC Guidelines for human Exposure to
Radiofrequency Electromagnetic Fields”. The 51 cm distance should be maintained under the
following conditions:
•
The antenna is powered on and transmitting. The MBS2 transmits only when the
computer in the vehicle sends messages to the host computer.
•
A person is blocking line-of-sight to the satellite during transmission. A person on or
above the vehicle roof and within 51 cm of the unit could interfere with the MBS2
transmission path.
Other Safety Precautions
Read and understand the complete Installation Guide, including the Safety Precautions, prior to
using the MBS2 Modem.
The MBS2 is a radio unit used to receive and transmit data. When in operation, the MBS2
transmits and receives RF signals to and from a Geo-stationary orbital satellite.
The MBS2 must be used in accordance with the safety guidelines stated in this document.
Failure to comply could result in physical harm and can be a hazard to the health of the operator
of this unit.
WARNING!
The following safety precautions must be observed during all phases of the operation, usage,
service or repair of the MBS2 unit.
1. The MBS2 must be operated at the voltages described in the unit technical
documentation.
2. The MBS2 must not be mechanically or electrically changed or modified. Use of all
connectors should follow the guidance of the MBS2 technical documentation.
3. Replace fuse with same type and rating for protection against fire and damage.
4. The MBS2 is a RF generating device. Do not operate the unit when anyone is in the
vicinity noted in the Safety Information section of this guide. This could result in personal
injury.
5. Do NOT operate the MBS2 unit in areas where explosives are in use as the RF
frequency could interfere with the operation, causing hazardous conditions. Do NOT
operate the MBS2 unit in areas where two-way radio communications is prohibited.
6. Use discretion when determining the MBS2 installation point. After installation, ensure
that all systems are functioning properly. Consult vehicle dealer for further information.
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GENERAL DESCRIPTION
MBS2 Unit
The MBS2 is comprised of an Interactive Satellite Packet Data (ISPD) modem, a General Packet
Radio Service (GPRS) terrestrial wireless modem, and an 802.11b modem, well as associated
antennas. It also supports a Global Positioning Service (GPS) receiver, as well as a Keyfob
receiver for Personal Alert.
The MBS2 is pictured in Figure 1 and Figure 2.
Figure 1: MBS2 Front View with Covering
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Figure 2: MBS2 Front Oblique View without Covering
The MBS2 is typically connected to a peripheral computer called the Client Side Computer (CSC)
using a tethered serial port connection and/or an untethered 802.11b connection. The CSC can
be a standard laptop or other computing device. The user application and associated middleware
resides on the CSC. The MBS2 is capable of supporting some user applications.
The CSC communicates over the Wireless Matrix Wide Area Wireless (WAW) Network via the
MBS2. At the link layer, PPP or the Modem Interface Protocol (MIP) can be used between the
CSC and MBS2.
At the transport layer, the CSC can use UDP to communicate with a Customer Host via the WAW
Network.
WAW Network
The WAW Network, shown in Figure 3, consists of a Data Hub, satellite and terrestrial wireless
networks, and the MBS2 unit. WAW is an enterprise solution wireless data service between
remote modems and Customer Host computers, offering seamless coverage with a single point of
connection to the network. This packet-data service can be routed over either Mobile Satellite
Venture’s MSAT-2 satellite or the AT&T Wireless Services (AWS) GPRS network
Customer Hosts connect to the Data Hub via Frame, VPN, or leased-line. The Data Hub consists
of:
•
•
•
Network Operations Support System (NOSS): manages the modems on the WAW
network
Wireless IP Gateway (WIPG) that connects to the ISPD and AWS GPRS networks and
controls data sent between the Customer Hosts and MBS2s.
ISPD equipment
The Wireless Matrix-owned and operated ISPD Network consists:
•
•
•
•
Primary Data Hub equipment located at Wireless Matrix in Reston, Virginia
Secondary Data Hub equipment located in Ashburn, Virginia
Communications Ground Segment (CGS) located at Mobile Satellite Ventures in Reston,
Virginia
MSAT-2 geostationary satellite. MSAT-2 covers the United States and its coastal waters
as well as Canada
On the client side, a CSC device connects to the MBS2. The MBS2 routes messages over the
Wireless Matrix ISPD Satellite network or the AWS GPRS network, depending on which network
the MBS2 determines to be the “Active Network”. The MBS2 is also responsible for notifying the
WIPG when its Active Network changes.
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Wireless Matrix
Wide Area Wireless (WAW)
Mobile Satellite
Ventures (MSV)
MSAT-1,2
X.25
MSV-Reston
Wireless Matrix
Data Hub Network Components
ISPD
Processors
Leased Line
Hosts
AT&T Wireless
Services (AWS)
GPRS
Internet
AT&T
Frame Relay
Hosts
Frame Relay
802.11b
CSC
Wireless
IP Gateway
(WIPG)
MBS-2
Hosts
Location/
Network
Register
Network Operations
Supprt System (NOSS)
Figure 3: WAW Network
COMPONENTS
Command Server
The MBS2 command server is a logical entity that contains information about routing, MBS2
status, and configuration parameters.
It has a dedicated port number that can be accessed by external entities to make configuration
changes to and queries about the status of the MBS2 and wireless network availability. The
command server is accessible by Customer Hosts, client applications, CSCs, and the WAW
Network Operational Support System (NOSS) by using UDP.
Some of the key features of the command server are as follows:
•
•
•
•
Initiate the MBS2 commissioning process
Send and receive MBS2 Management messages to and from the NOSS
Provide control of and access to information about the various components within the
MBS2 (GPS, Terrestrial and Satellite modems, etc.)
Monitor status of MBS2 and its components, and provide status information to the NOSS
or CSC upon request
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Satellite Modem
The L-band satellite modem is used to communicate at L-band via the ISPD network. The
modem is provided with an omni-directional cross-dipole antenna. The satellite modem is
designed and manufactured by Wireless Matrix.
GPRS Modem
A GPRS terrestrial wireless modem is used to communicate on the AT&T Wireless Services
(AWS) GPRS network. The GPRS modem is a Motorola model G20 OEM module.
A monopole antenna is used with this modem.
802.11b Modem
The MBS2 uses a 802.11b WLAN modem to connect to the CSC wirelessly. By doing so, it
extends the range of a CSC user to several hundred feet from the MBS2. This “Wireless Tether”
also provides good in-building penetration, up to 150 feet.
The Wireless Tether supports all of the same functionality that a standard serial port connection
supports. The MBS2 is capable of routing the communications of multiple CSCs via the WAW.
Also, a CSC using one MBS2 may “Roam” to another MBS2 and use the latter to communicate
with the WAW network. With this flexible scheme, the MBS2 is truly a Base Station that is
mobile.
The MBS2 uses the Cisco Aironet 350 PCMCIA card for 802.11b communications. An elevated
dipole antenna is provided. The customer is responsible for providing the CSC with a wireless
modem card capable of communicating with the Wireless Tether modem and approved by
Wireless Matrix.
MBS2 supports ad-hoc mode for communications with a CSC, or infrastructure mode for
communications with an Access Point in an In-Yard Communications situation.
The MBS2 also has the capability to use the Wireless Tether to communicate with CSCs that use
a sleep mode for power conservation. See the Magic Packet section for details.
GPS Receiver
The GPS receiver option includes a GPS receiver and a separate patch antenna.
The GPS receiver is a Lassen LP, manufactured by Trimble. It measures position with an
accuracy of 25 meters1, velocity accurate to 0.1 meters/sec, and time accurate to 95 nanoseconds.
The GPS information can be used by the Wireless Matrix AVL application, the application running
on the CSC, or another User Application stored on the MBS2.
The CSC application can access GPS information through command server primitives (refer to
Fehler! Verweisquelle konnte nicht gefunden werden. for details).
Subject to Selective Availability (SA)
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Keyfob Receiver
For Alert and Personal Alert features, the MBS2 uses a 315 MHz keyfob receiver and inverted-F
antenna. An external keyfob transmitter is also provided.
FEATURES
Multi-Network Routing
The Multi-Network Routing (MNR) function enables the MBS2 to send communications over the
best available network, as determined by a “Primary Network” setting and the coverage situation.
The routing algorithm is based on a parameter called the “Active Network”, and is explained in the
sections below.
The MBS2 is configured during Commissioning to have a “Primary Network”, or a preferred
network. The MBS2 will always use the Primary Network as the Active Network when within
Primary Network coverage. The Secondary Network will become the Active Network only if no
Primary Network coverage is available.
For instance, if the Primary Network is satellite, and the MBS2 is in satellite coverage, the Active
Network for the MBS2 is satellite. If the MBS2 leaves satellite coverage but is still in terrestrial
wireless coverage, the Active Network would become terrestrial.
Active Network (AN) Determination
The MBS2 periodically evaluates the Satellite and GPRS Network coverage and updates its
Active Network based on a predefined Active Network Algorithm (not to be confused with the
MNR algorithm). In general, if a change in its Active Network occurs, the MBS2 will inform the
WIPG of the new Active Network value by sending an Active Network Message (ANM), so that
the WIPG can use the Active Network for its own MNR algorithm.
Magic Packet
WAW offers the Magic Packet (MP) feature to conserve battery life on a CSC while maintaining
Wireless Tether communications upon demand. Thus, a CSC can enter sleep mode and be
awaken by a Magic Packet whenever the Customer Host has data to send to the CSC (provided
that the CSC is in WLAN range of the MBS2). The Magic Packet Feature is described in more
detail in _________.
In-Yard Access
In-yard access provides the ability to send and/or receive data with lower latency, high
throughput, and reduced airtime expense by routing the data directly through a Customer-owned
In-Yard 802.11 network
When the MBS2 arrives in an In-Yard district, the MBS2 will associate with the AP at the district.
On successful association, the CSC sends or receives traffic directly to or from the customer
corporate network. As soon as the MBS2 leaves the AP WLAN coverage area, it will go back to
its original configuration (i.e., WAW IP).
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When the MBS2 is not in the coverage area of any AP, it will forward packets received from the
serial connection to the WIPG, and the WIPG will route packets to the application host. The
returned traffic from host side will reach the CSC in the reverse fashion. See Figure 4 for a
graphical description.
This ability is achieved using Mobile IP, as well as the MBS2’s 802.11b device in infrastructure
mode.
Satellite dish
WRX Data
Hub
Frame
Relay
AWS GPRS Network
WRX WAW
Network
Base Station
Edge Router
(WRX)
In-Yard District A
Edge Router
In-Yard District C
In-Yard
Host A
Subnet A
Non-In-Yard
Communication Path
In-Yard
Host C
In-Yard District B
Edge Router A
Application
Host
Immediate
Router
Subnet C
DM-Router
In-Yard
Communication Path
Core Router
Edge Router B
Edge Router C
Customer
In-Yard Corporate
Host B Network
Subnet B
Figure 4: Customer Corporate and WRX Networks
Wireless DHCP (WDHCP)
The Wireless Dynamic Host Configuration Protocol (WDHCP) provides the dynamic assignment
of IP addresses to the CSC. The IP addresses are assigned and maintained by the WAW
Network. WDHCP allows CSCs to associate with any MBS2 to gain access to the WAW
Network.
WDHCP relies on the Wireless Modem Discovery (WMD) protocol: a simple protocol used by
client CSCs to query for the availability of MBS2s within their communication range. Once the
MBS2 is selected, the CSC registers with a WDHCP server in the NOSS, which processes the
request and assigns the IP address to the CSC
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Internet Protocols Support
The MBS2 is capable of supporting the following IP-based protocols:
•
•
•
•
•
DHCP client and server on all MBS2 IP-capable interfaces
Standard IP routing between all MBS2 IP-capable interfaces
PPP over the Serial Interface
ICMP Ping from the MBS2 to the user-specified address
Telnet and TFTP firmware downloads from all MBS2 IP-capable interfaces
User Applications
The MBS2 supports multiple User Applications residing in its firmware. The User Applications
can total 64kB in size. One specific type of User application is Wireless Matrix AVL.
Alert and Personal Alert
The Alert and Personal Alert features can be used to inform the Customer Host of an important
event, such as driver in danger or “man-down” messages. The Customer Host would be able to
distinguish between a keyfob or vehicle button activation.
The Alert message is generated by the closing of an electrical contact, and the Personal Alert
message is generated by a keyfob. The wireless keyfob signal can be received by the MBS at a
distance of 150 feet.
The message is sent with location information and truck identification by using the Wireless
Matrix AVL application.
MISCELLANEOUS
Addressing
All components of the WAW system are addressed using IP addressing. Customer Hosts,
MBS2s, and CSCs are designated IP addresses in the following subnet range: 10.128.0.1 to
10.254.255.254.
From the Customer Host point of view, the CSC IP address may be statically assigned or
dynamically assigned using WDHCP. The pool of addresses used for assignment shall be
specified by either the Customer or Wireless Matrix personnel.
Ports 51000 to 51999 shall be reserved for User Applications residing on the MBS2.
Throughput
MBS2 throughput on the WAW network is almost entirely dependent on the throughput of the
underlying ISPD and GPRS networks. Raw data rates are known, but actual throughputs are
estimated, based on the fact that multiple users share the over-the-air channels.
Table 1 lists the data rate information for each network.
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Wireless Matrix MBS2 User Guide
Type of Data Rate
Raw
After Overhead, channel sharing
(Estimated)
Document MBUD-0086v1b
ISPD
6.75 kbps
AWS GPRS
42.8 to 64.2 kbps
0.3 to 0.6 kbps
4 to 8 kbps
Table 1: MBS2 Underlying Networks Throughput Comparison
Note that since the underlying networks are transparent to the MBS2 user, the actual throughput
depends on the current Active Network. A minimum throughput is not guaranteed.
Tools
Wireless Matrix provides two tools to assist the developer on the WAW system: Wireless Matrix
Chat and Communicator. The tools are Open Source license tools distributed in code form. This
provides complete visibility for the developer and enables straightforward extensions to the
program that the developer may want to add.
The Wireless Matrix Chat program was created to provide simple chat sessions over the air from
Customer Host to MBS2 or from MBS2 to MBS2.
The Communicator is similar to the On-Board Computer (OBC) application used in the Wireless
Matrix X.25 network. It allows an operator to:
•
Edit and send messages to an arbitrary IP address
•
Send a file of arbitrary size to an arbitrary IP address
•
View the text of messages received by the Communicator
•
Monitor the operational status of the MBS2
•
Monitor the signal strengths of the networks to which the MBS2 is connected
•
Access the Command Server of the MBS2
The Communicator user interface is suitable for all types of client devices, including small form
factor WinCE handheld and, potentially, Palm devices. It operates on both sides of the WAW
(server/host and client/MBS2), so that with a single tool the developer can easily test end-to-end
communications.
On the client side, the interface to the MBS2 command server is via the serial port (or wireless
tether), and on the Customer Host side the interface to the MBS2 command server is over the
WAW Network via standard UDP/IP.
INSTALLATION OVERVIEW
Installation
The Wireless Matrix MBS2 modem is mounted to a vehicle and wired in order to:
•
•
Draw power from the vehicle to power the unit
Connect the unit to a Client Side Computer (CSC) for data transmission/receipt purposes
Installation instructions for the MBS2, while not complex, are detailed, and are included in a
separate installation manual (MBUD-0085v1, dated 2/27/04). Please consult this manual if you
need to install the MBS2 unit.
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To verify the MBS2 unit is operational; ensure the following items:
1. Move the vehicle to an area where there are no obstructions to the southern
exposure for the Wireless Matrix MBS2.
2. Check the cable connections to the MBS2 and verify it is securely connected.
MBS2 Operation
The operation of the MBS2 is passive. It will activate in order to send data, which is triggered by
use of an application on the Client Side Computer for such purposes. It will also activate when it
receives a remote request (such as when it is polled for vehicle information), or receives data
(such as a message from a dispatcher). In addition, because the unit will automatically select the
best routing for messages without user intervention, the user does not need to interact with the
unit to select a communications method.
In this regard, there is no activity which the vehicle operator must undertake with the MBS2 unit.
Equipment Failure or Damage
If the MBS2 unit suffers a mechanical failure or is damaged during the course of the program,
please notify Customer Care as soon as possible. Equipment that is returned damaged or in
non-working order without prior notification will be the responsibility of the program participant.
March 04, 2004
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