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7/30/2019 Motorola BSS Operational Theory222222222222
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7/30/2019 Motorola BSS Operational Theory222222222222
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
2
GSM Network Components
Mobile Station (MS)
Network Switching System (NSS)
Base Station System (BSS)
Which consists of three major hardware components:
The Transcoder (XCDR)
The Base Station Controller (BSC)
The Base Transceiver Station (BTS)
7/30/2019 Motorola BSS Operational Theory222222222222
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
3
Base Station System (BSS)
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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Transcoder (XCDR)
Transcoder (XCDR)
This converts the information from 64kbit/s PCM into 13kbit/sGSM defined speech.
Divided into Three Areas
Interfacing
Trans coding Switching
7/30/2019 Motorola BSS Operational Theory222222222222
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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Transcoder FunctionalRequirements
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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Base Station Controller (BSC)
BSCThe BSC provides overall Base Station System control. Being atthe centre of the BSS it
provides connectivity between the MSC and a number of BTSs.
Divided into Two Areas
Interfacing
Switching
7/30/2019 Motorola BSS Operational Theory222222222222
7/23MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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BSC Functional Requirements
7/30/2019 Motorola BSS Operational Theory222222222222
8/23MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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Base Transceiver Station (BTS)
BTSThe BTS provides the Base Station System with the radio link via
which the MS communicates with the network.
Divided into Three Areas
Interfacing
Switching
RF Equipment
7/30/2019 Motorola BSS Operational Theory222222222222
9/23MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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BTS Functional Requirements
7/30/2019 Motorola BSS Operational Theory222222222222
10/23MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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Base Station System Controller(BSSC) Cabinet Operational
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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BSSC Configuration
A BSSC cabinet can be configured as:
A Base Station Controller (BSC) containing digital hardwaremodules configured to control the radio subsystem.
A Remote Transcoder (RXCDR) containing digital hardware
modules configured to provide an interface between theBSC and Mobile Switching Centre (MSC).
A combination of the BSC and RXCDR functions.
The difference between the BSC and RXCDR configurations is inthe complement of digital modules on the backplane.
7/30/2019 Motorola BSS Operational Theory222222222222
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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BSSC2 Cabinet External View
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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BSSC2 Internal View
7/30/2019 Motorola BSS Operational Theory222222222222
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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General View
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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BSSC Cabinet InternalComponents
The internal components of the BSSC cabinet include thefollowing:
BSU / RXU Shelf (up to two per cabinet)
Half size modules
Full size cards
Power Supply Modules
Cooling Fans
Power Distribution Board
Distribution Alarm Board
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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BSSC Cabinet Configurations
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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BSSC Cabinet InternalComponents
7/30/2019 Motorola BSS Operational Theory222222222222
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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Shelf Internal ConnectionsOverview
To process all the data required to make and maintain the call, eachsoftware process and therefore digital card must be able tocommunicate which each other and to any external entities such asthe MSC or BTS. Each card has one or more connections to one ormore data buses to co-ordinate this data transfer. Each bus hasdiffering functions
Buses can be summarized as below
Time Division Multiplexed (TDM) highway
Motorola Cellular Advanced Processor (MCAP) bus
Local Area Network (LAN) Serial bus
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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Shelf Interconnections Overview
7/30/2019 Motorola BSS Operational Theory222222222222
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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Base Station Unit (BSU)
Max numbers of Full Size Boards Contained within the BSU.
2 x Kiloport Switch (KSW)
12 x Multiport Serial Interface (MSI)
2 x Generic Clock (GCLK)
8 x Generic Processor (GPROC)
6 x Full-Rate Transcoder (XCDR)
6 x Generic DSP Processor (GDP)2 x Bus Terminator Card (BTC)
Max numbers of Half Size Boards Contained within the BSU18 x Kiloport Switch Extender (KSWX)
6 x Clock Extender (CLKX)2 x Local Area Network Extender (LANX)
2 x Parallel Interface Extender (PIX)
3 x Battery Backup Board (BBBX)
7/30/2019 Motorola BSS Operational Theory222222222222
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
21
BSU Shelf Module Layout
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or servicenames are the property of their respective owners. Motorola, Inc. 2004.
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Remote Transcoder Unit (RXU)
Max numbers of Full Size Boards Contained within the RXU.
2 x Kiloport Switch (KSW)6 x Multiport Serial Interface (MSI)
2 x Generic Clock (GCLK)
2 x Generic Processor (GPROC)
16 x Full-Rate Transcoder (XCDR)
16 x Generic DSP Processor (GDP)
2 x Bus Terminator Card (BTC)
Max numbers of Half Size Boards Contained within the RXU
18 x Kiloport Switch Extender (KSWX)
6 x Clock Extender (CLKX)
2 x Local Area Network Extender (LANX)2 x Parallel Interface Extender (PIX)
3 x Battery Backup Board (BBBX)
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MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office All other product or service 23
RXU Shelf Module Layout