Vanu Anywave Base Station System Manual

Vanu Anywave R !BSS Operator Guide — DRAFT
February 8, 2008
Vanu, Inc. One Cambridge Center, Cambridge MA 02142 t 617.864.1711 www.vanu.com Copyright c !2008 Vanu, Inc.

Copyright c !2008 Vanu, Inc. All rights reserved.
The product described in this manual is covered by US patents 6,654,428; 6,584,146; 6,876,864; 6,889,354;
7,139,967; and pending patents in the United States and other countries.
Vanu, Inc., the VANU logo, Anywave, and “Where Software Meets the Spectrum” are trademarks or
registered trademarks of Vanu, Inc. in the United States and other countries. The product described in
this manual includes copyrighted software. This software is commercial software.
“Powerwave,” “Protium,” “HP,” the stylized Powerwave logo, and any other trademarked terms used
in this manual are trademarks or registered trademarks of their respective owners.
The term “CDMA” is a trademark of Qualcomm, Inc. Licensed by QUALCOMM Incorporated under
one or more of the following Patents: 4,901,907; 5,490,165; 5,056,109; 5,504,773; 5,101,501; 5,778,338;
5,506,865; 5,109,390; 5,511,073; 5,228,054; 5,535,239; 5,710,784 5,267,261; 5,544,196; 5,267,262; 5,568,483;
5,337,338; 5,659,569; 5,600,754; 5,414,796; 5,657,420; 5,416,797.
The terms of use of this software are set forth in detail in a related software license agreement. Except as
otherwise set forth in such software license agreement, none of such copyrighted material may be
modified, copied, distributed, performed, displayed, or reverse engineered.
Vanu, Inc. One Cambridge Center, Cambridge MA 02142 t 617.864.1711 www.vanu.com Copyright c !2008 Vanu, Inc.

Vanu Anywave BSS Operator Guide — DRAFT
Contents
1 Introducing Vanu Anywave BSS 1
1.1 Introduction............................................. 1
1.2 Operator Guide Scope and Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Operator Guide Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Benefits of the Vanu Anywave BSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Features............................................... 4
1.5 Network Operator Role . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Anywave Components & Connections 6
2.1 BSSServer ............................................. 7
2.2 GPSTimingSource ........................................ 8
2.3 RFFrontEnd............................................ 9
2.4 Power Chassis and Power Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5 DC Breaker and Bus Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.6 PowerRectifier ........................................... 13
2.7 TerminalServer........................................... 14
3 System operation 15
3.1 Systemstartup ........................................... 15
3.2 SystemUsage............................................ 17
3.3 BTS Software Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.4 References.............................................. 19
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A Acronym Glossary 20
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Chapter 1
Introducing Vanu Anywave BSS
1.1 Introduction
Welcome to the Vanu Anywave Base Station System Operator Guide. This manual is designed to serve
as an information resource for the Vanu system you will be deploying. This guide focuses on hardware
preparation and deployment, and prepares you to provide first line technical support for the Anywave
BSS.
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1.2 Operator Guide Scope and Objectives
This Guide will cover the following topics:
•Anywave Components and Connections
•System Operation
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1.3 Operator Guide Assumptions
This Operator Guide assumes that the audience will have working knowledge about the following topics:
•Basic commands and usage of a Linux (or Unix) server, such as: user configuration, logging in,
copying files, up- and down-loading files, file permissions, file editing, etc.
•This BSS Operator Guide concentrates primarily on setup of the system; it is not intended to act as
an exhaustive guide on how to troubleshoot network issues or specific calls.
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1.4 Benefits of the Vanu Anywave BSS
The Vanu Anywave base station provides Radio Access Network (RAN) functionality by implementing a
complete GSM Base Station Subsystem (BSS) in software on a single general-purpose server. Signal
processing, protocol processing, and other radio access network functionality are implemented as
application level software running on top of the Debian GNU/Linux operating system.
Features
The Vanu Base Station System (BSS) has four major software components:
•The Base Transceiver Station (BTS) handles communication over the air interface with individual
mobiles. A BTS can handle many radio links simultaneously, and is responsible for any ciphering
over the air interface.
•The Base Station Controller (BSC) acts to manage a number of BTSs on functions such as radio
resource allocation, mobile handover, and passing messages to the mobile from the core network.
•The Transcoder and Rate Adapter Unit (TRAU) performs transcoding for speech channels and rate
adaptation for data channels, as necessary.
•The Packet Control Unit (PCU) is only found in a GPRS (General Packet Radio Service) network.
The PCU handles the radio resource aspects of GPRS connections.
Working together, these components integrate into a complete BSS solution that provides the full
functionality of a GSM Radio Access Network (RAN).
The Vanu Anywave System seamlessly connects mobiles to the phone network by first making a
mobile-to-BTS connection via the radio (or “air”) interface. The BTS is connected to, and exchanges
data with, the BSC via the Abis interface. The BSC then communicates to the MSC via the A interface.
In the data domain, there is a similar Gbis interface between the BTS and PCU, and a Gb interface
between the PCU and SGSN (Serving GPRS Support Node) for GPRS data.
A full base station is composed of the following major subsystems:
•An RF Front End, supporting the 850, 900, 1800, or 1900 MHz bands, which perform
Analog-to-Digital and Digital-to-Analog conversions, as well as up/down mixing and duplex
functionality.
•Waveform processing performed by the Anywave BTS software on a standard commercial server.
•A GPS timing reference.
•A typical BTS installation has other important parts that are not considered Vanu Anywave
components, such as: antenna(s), amplifier(s), power conditioning, and others.
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1.5 Network Operator Role
As Network Operator, you will oversee project planning and deployment of all components for the
wireless infrastructure, including the Vanu Anywave BSS. This process will require working with Vanu,
Inc. Technical Support to ensure all required settings are appropriately determined, implemented and
documented.
The following is an overview of the Network Operator Role and some of the duties you will be expected
to perform:
Deployment
•Understand the purpose of all hardware components used in the BSS
•Connect the hardware components of your BSS system
•Install and configure the various software applications used by the system
Operation
•Provide first line customer support in the pursuit of issue resolution, and ensure effective data
transfer to Vanu, Inc. Technical Support for all support escalations, as determined by existing
service level agreements.
•Manage technical issues regarding hardware and software required to run the Vanu Anywave
system.
•Coordinate and confirm system downtime with Vanu, Inc. Technical Support for the deployment of
system patches or general updates in accordance with service level agreements.
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Chapter 2
Anywave Components & Connections
Your Anywave BSS system includes and interacts with many different hardware components, including:
•The BSS server, which can act as individual or multiple parts of the Anywave System, depending
on network resources and requirements (such as BSC/TRAU/BTS, or BTS only).
•A Global Positioning System (GPS) timing reference.
•A Radio Frequency (RF) Front End.
•A Multi-Carrier Power Amplifier (MCPA).
•A circuit breaker.
•A power transformer for the MCPA, generally used for AC to DC conversion.
•A Terminal Server used to remotely access devices’ serial interfaces.
This chapter will provide a functional overview of these various components and their functionality.
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2.1 BSS Server
A standard commercial rack-mounted server (such as the Dell Poweredge or HP ProLiant series) runs the
Vanu BSS software on the Debian GNU/Linux operating system. A typical recommended server has
redundant power supplies, fans and hard drives (RAID 1 array) to ensure that the BSS remains
functional in the event of most hardware failures.
Figure 2.1: A HP ProLiant DL380 G5 Server, Front View
A Radio Frequency over Ethernet (RFoE) stream over Gigabit Ethernet is used to exchange the RF data
between the RF Front End and the server. The BTS application then performs all waveform-specific
tasks on this RFoE stream; these waveform-specific tasks include modulation, signalling, and
communications with the BSC,TRAU, PCU and mobile station(s).
The BSC controls one or more base stations and directs the BTSs in such functions as channel
assignments and handovers. BSCs reduce the processing load on the Mobile Switching Center (MSC) by
handling multiple Abis interface connections to all of the BTSs as well as handling the A interface
message stream with the MSC.
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2.2 GPS Timing Source
The Vanu Anywave System uses a Brandywine GPS4 to provide a precision time source for the BSS
system.
Figure 2.2: GPS4 Timing Source Connections
The GPS unit provides three important sources of data for BSS functionality:
•A 10 MHz signal
•A 1 Hz or Pulse-Per-Second (PPS) signal
•A precise value for time of day
The 10 MHz clock is used as both a frequency reference and a sub-second time reference by the RF Front
End.
The 1 Hz signal is used to synchronize the time alignment at BTSs across the network, both for proper
hardware alignment and minimization of neighbor BTS interference.
The time of day value is obtained via a serial connection, and is used to ensure that timestamps are valid
and consistent throughout the network.
Note:
The GPS unit can also be used to provide location information, but the data is not used by the Anywave
System.
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2.3 RF Front End
The wideband RF Front End performs transmission and reception over the air interface between the BTS
and GSM mobile stations. Using a wideband multi-channel front end allows one BTS unit to transmit
and receive multiple carriers over a bandwidth of 26 MHz.
The RF Front End includes both the RF up/down converter and the digital RF subsystem, which
perform digital filtering, timestamp injection and other functions. The BTS software communicates with
the RF Front End using digital baseband samples sent via Radio Frequency over Ethernet.
The Protium RF Front End Unit is divided into two compartments for noise containment. The lower
compartment contains the duplexer and associated filters. The upper compartment contains the RF
Up/Down converters, analog-to-digital converters, digital-to-analog converters, and other digital
hardware.
The RF signals are piped between the two compartments externally to maintain the noise separation. We
will refer to the lower compartment as the Duplexer and the upper compartment as the Up/Down
Converter for simplicity. The units will be installed and serviced as one box, but for the sake of clarity we
will describe them here as two components.
An RF Front End will provide functionality for a single frequency band, of which four are commonly used:
850 MHz, 900 MHz, 1800 MHz, or 1900 MHz. The chosen band will depend on the project requirements.
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Figure 2.3: Protium RF Front End Block Diagram
The figure above is a block diagram of the internal components that constitute the Protium RF Front
End used by the Anywave System.
When the BTS receives a signal from a mobile, an example path that data would follow would be: the
RF signal is received through the Main Antenna port (labeled “TO ANT”) which is connected to the
duplexer, which is used to separate the transmit and receive sides of the RF data. From there, the signal
is sent via RF cable to the main downconverter, which converts the signal to a lower intermediate
frequency (IF). That IF signal is then transferred (internally) to the digital downconverter which both
digitizes it and downconverts it again to a baseband signal. This digital baseband data is then sent out
over the Gigabit Ethernet Interface to the host (server).
For transmission, the BTS will generate and send digitized data over the Gigabit Interface to the RF
Front End, which then upconverts the data to an analog signal RF for amplification and broadcast from
the antenna to the mobile station.
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2.4 Power Chassis and Power Amplifiers
The Powerwave Chassis holds the Multi-Carrier Power Amplifiers (MCPAs) that are connected to each
RF Front End in the network. The outputs from the RF Front End are sent to the MCPAs via RF
cables, where the signals are amplified by +63 dB for broadcast over the antenna.
Figure 2.4: Power Chassis and two MCPAs
Please Note: For proper system operation, after the BSS has started, please be sure that the “Status”
LED appears green, and that the “Status Indicator” light next to the Serial Port is not lit. Make sure the
MCPA is properly seated and secured in the chassis. If problems persist, contact Vanu Technical
Support.
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2.5 DC Breaker and Bus Bar
The DC Breaker protects the Power Amplifiers from electrical surges and short circuits. Consult the
“Equipment Setup Steps” chapter for proper connections from an MCPA to its associated breaker and
power source (such as a rectifier).
Figure 2.5: DC Breaker and Bus Bar, Front View
Please Note: For proper surge protection, each MCPA must be connected to its own 50 amp breaker.
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2.6 Power Rectifier
The Power Rectifier used in a typical deployment converts 120 Volt AC current to 27 Volt DC current,
making it possible for the MCPAs to be powered by an AC power source. The Power Rectifier’s ability to
hold up to three power modules makes it easy to swap out an existing power module or add a new one as
necessary for increased DC power.
The Power Rectifier used in your deployment will have one power module. Each MCPA has two power
connections: +27V DC (red) and the Return (black) to the rectifier being used in the system. Each
power module in the rectifier requires its own 120 Volt power source.
Figure 2.6: Powerwave Power Rectifier
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2.7 Terminal Server
The Terminal Server provides serial functionality over the network for both serial consoles and serial data
connections. The Terminal Server 16 can provide sixteen independent serial connections from a single IP
address to multiple servers, allowing access to network server applications that support TCP/IP. This
prevents the need to install serial cards in multiple servers at a location, and enables the use of servers
that cannot support a serial card.
Figure 2.7: Digi Terminal Server TS 16
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Chapter 3
System operation
3.1 System startup
After all equipment connections have been correctly made, the system will be ready for operation. To
start the system:
1. Switch on the Protium RF unit.
Figure 3.1: RF Front End Power Switch
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2. Power on the HP DL380 G5 BSS Server containing the Anywave software.
Figure 3.2: DL380 G5 Control Panel
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