Trilliant Networks GW-SD1050 4.9GHz , 802.11 Based, Fixed Wireless Node User Manual GWSD1050 revised

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SKYPILOT NETWORKS CONFIDENTIAL AND PROPRIETARY
User Guide
Gateway (GW1050)
Seed/CPE (SD1050)
Version 1.1
December 8, 2005
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User Guide .......................................................................................................................... 1
Introduction................................................................................................................. 3
1.1
Gateway (GW1050) ............................................................................................ 4
1.2
Seed/CPE (SD1050)............................................................................................ 4
Network Architecture.................................................................................................. 5
2.1
Link Establishment ............................................................................................. 5
2.2
Routing................................................................................................................ 5
2.3
Bandwidth Allocation ......................................................................................... 6
2.4
Networking ......................................................................................................... 6
Installation................................................................................................................... 7
3.1
Unit Mounting..................................................................................................... 7
3.2
Cabling................................................................................................................ 8
Configuration ............................................................................................................ 10
4.1
GW1050 Configuration .................................................................................... 10
4.1.1
Frequency.................................................................................................. 10
4.1.2
IP Address Management ........................................................................... 10
4.2
SD1050 Configuration ...................................................................................... 12
4.2.1
IP Address Management ........................................................................... 12
4.2.2
Ethernet Port Control ................................................................................ 12
CLI ............................................................................................................................ 13
SNMP........................................................................................................................ 14
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1 Introduction
The SkyPilot Gateway (GW1050) and Seed/CPE (SD1050) provide a complete, highperformance wireless system operating in the unlicensed 4.9 GHz public safety band. The
flexible and highly scaleable SkyPilot system is ideally suited to a wide range of
applications. The system offers:
• High Capacity and Long Range
OFDM technology, a large link budget and modulation rates of 6-54Mbps, provide
reliable Non-LOS operation and market leading capacity.
• Meshing
The system offers the flexibility of customer connection directly to a SkyPilot
Gateway (GW1050) or via an intermediary Seed (SD1050), resulting in vastly
increased coverage when compared to typical point-to-multipoint systems.
• Standards Based
The SkyPilot system is based very closely on the 802.11 standard and utilizes
commercial chipsets. SkyPilot has implemented significant enhancements that
provide range and performance advantages.
• Easy Installation
The compact, environmentally hardened, fully integrated Gateway and Seed/CPE
require minimal configuration and can easily be installed on a multitude of locations.
• Networking
The SkyPilot system implements an intelligent, Ethernet switching network, with a
10/100bT bridge interface provided by the Gateway and Seed/CPE. Subscriber rate
control and traffic prioritization QoS mechanisms are supported, along with optional
VLANs. In addition, there is support for configurable protocol filtering and Access
Control Lists (ACL).
• Security
AES link encryption and complete node authentication with optional support for full
MD5 certificates.
• Network Management
Both node types are fully manageable via SNMPv2c and a Command Line Interface
(CLI). Static or DHCP IP address allocation is supported.
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1.1
Gateway (GW1050)
The Gateway (GW1050) is a fully integrated, environmentally hardened device providing
the interface between a wireless SkyPilot network and the Internet/Wide Area Network
(WAN). The connection to the Internet is via a single 10/100bT Ethernet port. The
connection to the SkyPilot Seed/CPE (SD1050/SC1050) units is via multiple,
individually optimized wireless links.
The SkyPilot Gateway houses eight individual antenna elements providing a total of 360
degree horizontal coverage and a 12 degree vertical angle. These antennas, along with all
RF and digital circuitry, are integrated in a compact, light-weight, environmentally
hardened housing. Note that only one antenna is selected at any one moment in time.
1.2
Seed/CPE (SD1050)
The Seed/CPE (SD1050) provides for both the extension of a wireless network and the
local connection for a subscriber. It may be deployed in any of the following modes:
• Seed Only
An SD1050 can be deployed solely for the purpose of expanding the wireless
network. In this mode, a subscriber interface shall not be provided.
• CPE Only
An SC1050 can be deployed solely for the purpose of providing a subscriber interface
to the wireless network. The unit is installed on (or close to) a subscriber’s home or
business and the 10/100bT Ethernet interface provides a high-speed network
interface.
• Combined Mode
An SD1050 can provide a subscriber interface while also expanding the wireless
network. A unit installed on a subscribers premise also provides for the expansion of
the network with (typically) multiple wireless links to other units.
The SD1050 is mechanically and electrically identical to the GW1050, containing the
same antenna array. A single 10/100bT Ethernet port provides a subscriber interface.
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2 Network Architecture
The GW1050 and SD1050 combine to create a robust, high capacity wireless network.
All links within the network are established and optimized automatically. A highly
efficient routing algorithm selects the best path for user traffic and heals around any
network failures.
2.1
Link Establishment
A Gateway is installed and configured for a given channel within the UNII band - see
Section 4.1.1 for details of frequency selection and configuration. This Gateway will
signal it’s presence through the use of a periodic beacon message transmitted on the
configured frequency utilizing a single antenna. When a Seed/CPE is installed it listens
for this network beacon message. When a beacon is received, the Seed/CPE shall respond
and attempt to establishment a link.
Once a link is successfully created, the two units will automatically complete link
optimization. This ensures the selection of optimal antenna, power setting and
modulation rate. The SkyPilot units support modulation rates of 6-54Mbps and the
highest, reliable rate shall be selected through the exchange of test packets. Note that
established links are continually monitored and periodically optimized.
2.2
Routing
Once a Seed/CPE has connected to the network it shall select a route to the Gateway. The
automatic route selection considers the number and modulation rate(s) of the constituent
links. Once a route is selected, all user traffic shall be forwarded via this path.
Rerouting shall occur rapidly in the face of a link loss. Rerouting will also occur if a
lower cost route is consistently available.
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2.3
Bandwidth Allocation
The SkyPilot system implements a synchronization of the 802.11 protocol. This
synchronization allows for the establishment of individual links between nodes utilizing a
unique timing and antenna combination. In addition, highly accurate traffic rate and jitter
control is enabled.
The SkyPilot system provides rate control for subscriber traffic both in the downstream
(Gateway to CPE) and in the upstream (CPE to Gateway) direction. The maximum rate
downstream and upstream rate can be specified for each subscriber. In conditions of oversubscription when the overall bandwidth demand is higher than the system capacity, the
individual subscriber data rates will be reduced proportionately. i.e. a configured 2Mbps
is reduced to 1.5Mbps while a configured 1Mbps rate is reduced to 750kbps.
See Section 4.2.4 for details of the subscriber rate configuration.
2.4
Networking
The SkyPilot system operates as a Layer 2 network. The GW1050 and SD1050 have an
Ethernet bridge. All upstream subscriber traffic is direct out the GW1050 Ethernet port
and to external switch or router.
The GW1050 and SD1050 implement a SNMPv2c agent. In addition, there is also a CLI
that may be access locally via a serial port or remotely via Telnet. In order to support
these interfaces, an IP address must be allocated. This allocation can be done dynamically
via DHCP or may be statically configured. See Section 4 for details.
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3 Installation
In a typical wide-area wireless network utilizing SkyPilot units, the Gateway is installed
on the roof of a tall building or tower. The direct coverage area of the Gateway is
generally proportionate to the height of the installation.
A Gateway may also be used in smaller scale networks. Examples include high-capacity
business or academic campus interconnection, or a localized access network. In this case,
the Gateway could be installed on a local, medium height building or utility pole.
As previously mentioned, the SD1050 maybe deployed as a CPE, in which case it is
installed on a customer location, or as a Seed device. As a Seed device it may be installed
on medium height buildings, or utility poles.
3.1
Unit Mounting
A mounting bracket is provided with the GW1050 and SD1050 units. This bracket
fastens to a standard 1.25inch diameter pole. Any mounting system that meets local
wind-loading regulations and provides a 1.25inch diameter by 5inch long connecting
surface will be satisfactory. The photograph below shows a typical rooftop unit
installation.
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3.2
Cabling
GW1050 and SD1050 both support Power over Ethernet (PoE) utilizing the Power
Injector provided. Note that the GW1050 and SD1050 units should be installed with the
SkyPilot provided Power Injector only. The use of other PoE Power Injectors could
result in damage to the unit.
Both units provide a 10/100bT connector and an RJ45 serial interface. The 10/100bT
Ethernet port provides interconnectivity for user and network traffic, while the serial port
is used for local access to the CLI. The photograph below shows the Ethernet port on the
right and the serial port to the left.
In order to ensure full weatherproofing, the grommet provided must be installed. The
Ethernet cable should first be connected and then pushed into the slit in the gasket and
then the gasket is pushed into the opening in the base. See the photograph below.
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Finally the cover is installed using the provided screws. The Ethernet cable is position to
pass through the insert in the cover. It is highly recommended that the cover and gasket
be fitted in a Seed Only application (i.e. no subscriber or WAN interface).
Once the node is installed, it is recommended that the Ethernet cable be secured to
prevent strain (particularly installations exposed to high wind conditions). The
photograph below shows an example were the cable is secured to the mounting pole.
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4 Configuration
The SkyPilot system requires minimal configuration before service can be offered. There
is the option to utilize the SkyPilot Provisioning Server or to manual configure. The
Provisioning Server, with its interface to an SQL database facilities the configuration of
large scale networks. The Provisioning Server is the topic of a separate document. This
document shall focus on the manual configuration of GW1050 and SD1050 units.
4.1
GW1050 Configuration
The Gateway must be configured for the following:
1.
2.
3.
4.
4.1.1
Frequency
IP Address Mode – DHCP or Manual
Management IP Address and Mask (if manually configure)
Ethernet Port Control
Frequency
The Gateway supports operation in the public safety band of 4.94 to 4.99 GHz. With its
directional antenna and large link budget, the SkyPilot system is very effective in
avoiding interference. However, if there are situations where significant interference is
present within the public safety band band. SkyPilot recommends that an operator utilize
a spectrum analyzer to scan the frequency spectrum prior to installing one or more
GW1050. If a high level of interference is observed, then a subset of the available
channels should be selected.
4.1.2
IP Address Management
The Gateway management interface (SNMP, Telnet) requires the allocation of an IP
address. A Gateway can be configured to use either DHCP for dynamic IP address
allocation or can be statically configured via the CLI.
DHCP is the default. For static allocation the IP Address, Netmask and IP Default
Gateway must be input via the CLI. See Section 5 for details.
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4.1.3
Ethernet Port Control
The GW1050 allows for the disabling (and enabling) of the 10/100bT Ethernet port.
Default is enabled. It is anticipated that the disabling of the Ethernet port may be used for
troubleshooting purposes.
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4.2
SD1050 Configuration
A SD1050 must be configured for the following:
1.
2.
3.
4.
4.2.1
IP Address Mode – DHCP or Manual
Management IP Address and Mask (if manually configure)
Ethernet Port Control
QoS Data Rates
IP Address Management
The SD1050 management interface (SNMP, Telnet) requires the allocation of an IP
address. It can be configured to use either DHCP for dynamic IP address allocation or can
be statically configured via the CLI.
DHCP is the default. For static allocation the IP Address, Netmask and IP Default
Gateway must be input via the CLI. See Section 5 for details.
4.2.2
Ethernet Port Control
The SD1050 allows for the disabling (and enabling) of the 10/100bT Ethernet port.
Default is disabled. The disabling of the Ethernet port is recommended in the case of
Seed Only application (i.e. when there is no subscriber interface). The enable/disable
Ethernet port facility can also be used to control subscriber access in the case of a CPE
Only or Combined application.
4.2.3
Subscriber Data Rates
The SD1050 allows for configuration of maximum downstream and upstream data rates.
These values are selected from a list of defined options. The values relate to traffic sent
and received over the Ethernet port and are not applicable in the case of a Seed Only
application.
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5 CLI
The GW1050 and SD1050 both provide a complete CLI interface. This interface may be
used to configure and monitor the unit. A full definition of the CLI is available – email
support@skypilot.com to request a copy.
As an example, the GW1050 configuration screen is shown below. All other GW1050
parameters are read-only.
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6 SNMP
Both GW1050 and SD1050 have a SNMPv2c agent. The following MIBs are supported:
1.
2.
3.
4.
MIB-II (RFC 1213)
EtherLike (RFC 2665)
Bridge (RFC 1493)
SkyPilot Private MIB
Email support@skypilot.com to request a copy of the SkyPilot MIB.
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7 FCC Radio Frequency Interference Statement
SkyGateWay/SkyExtender FCC Number: RV7-GW-SD1050
This equipment has been tested and found to comply with the limits for a class B digital
device, pursuant to part 90 of the FCC Rules. These limits are designed to provide
reasonable protection against 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 and correct the interference by one or more of the following
measures:
This equipment has been certified to comply with the limits for a class B computing
device, pursuant to FCC Rules. In order to maintain compliance with FCC regulations,
shielded cables must be used with this equipment. Operation with non-approved
equipment or unshielded cables is likely to result in interference to radio and TV
reception. The user is cautioned that changes and modifications made to the equipment
without the approval of manufacturer could void the user's authority to operate this
equipment.
Maximum Permissible Exposure
In order to meet the FCC’s requirement of 1 mW/cm2 for Maximum Permissible
Exposure (MPE) at 4.9 GHz, the SkyGateway/SkyExtender units must be located a
minimum of 20 cm (8 inches) from all persons. This distance is determined based upon
the aforementioned 1 mW/cm2 limit, measured data, and the far-field peak power density
equation below:
d=
where:
0.282 10 (( P +G ) / 20 )
d = MPE distance in cm
P = Power in dBm (peak)
G = Antenna Gain in dBi
S = Power Density Limit in mW/cm2 (1 mW/cm2)
Certified laboratory measurements indicate that the FCC’s Power Density Limit of 1
mW/cm2 is met at a distance of much less than 20 cm (8 inches). However the minimum
distance for fixed or mobile transmitters is 20 cm even if calculations indicate the MPE
distance is much less.
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