53413228 020ZXC10 BSS Hardware System Module V2 0

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ZXC10-BSS Hardware System

Unit 1－－ ZXC10-BSS Overview

Unit 2－－Subsystems of BSC

Unit 3－－ Subsystems of BTS


ZXC10-BSS Hardware System Unit 1


Main Content

CDMA 1x network structure and BSS position in all the system

ZXC10-BSS system structure

ZXC10-BSS system features


CDMA 1x Network

3GBTS

2GBTS

2GBSC

HLR/AUC

AAA Server

MSC/VLR

BSC/PCF

2GBTS

PDSN/FA

HA

PSTN/PLMN

Abis

Abis

Abis

A(IOS4.X)

IP Cloud

Router

Router

IPCloud

Internet

Um(IS-95A)

Um(IS-95A)

Um(IS-2000)

A(IOS4.X)

A InterfaceUm Interface

BSS


BSS Position in System

• The ZXC10-BSS is the core part of a CDMA2000 digital cellular

mobile communication system developed according to IS-2000 .

• The interface between BSS and MS (Mobile Station) is Um

interface; and the interface between BSS and LE (Local exchange) is

A-interface.

• The BSS mainly performs the function of information interaction

in the air with MSs, and supports high-speed packet data services at a

rate of up to 153.6kbps.

• The ZXC10-BSS is the core part of a CDMA2000 digital cellular

mobile communication system developed according to IS-2000 .

• The interface between BSS and MS (Mobile Station) is Um

interface; and the interface between BSS and LE (Local exchange) is

A-interface.

• The BSS mainly performs the function of information interaction

in the air with MSs, and supports high-speed packet data services at a

rate of up to 153.6kbps.


BSS Position in System

MSC

PDSN

A interface

A10/A11 interface

UmMS

BSC

CDSU

CDSU

SVICM

PCFIM

interface

UmMSinterface

Micro-BTS

RFS

BDS

RFS

BDS

RFS

BDS

CDSU

Abisinterface

Abisinterface

DCM

PDS

A10d/A11d interface


Um Interface Layer


A Interface Protocols Model

PCF PDSN

A2

A9signal

A8Traffic

ObjectiveBSC

sourseBSC

SDU

A1

MSC Call processing and mobility management

Switching

A11signal

A10traffic

A7signal

A3Traffic/signal

CDMA2000 A interface observe IOS4.X protocol standard，it is devided to A1，A2，A3，A5，A7，A8，A9，A10 and A11 interface.


Abis Interface Protocols Model


BSS Total Structure

BTS BSC

BSMCPSSVBSHIRSCDSUTFS

PAM

CPM

SVICM/ESVICM

SVM

NCM

NIM

CDSU

GPSTM

TCM

HPA

CHM

CCM

RFIM

SAM

Sub-system

Module/board

PS

PPM

PSMC

PSMD

PSMB

RFS

BTM

TRX

RFE

BDS

FDM

BSS

CDSUTS

CDSU

GPST

TCM

PS

PSMB

PD ASM

PCFS

PCFIM

PCF

ElementSVECE

System

SDE


• In BSS,any subsystem

can communicate with

others，if it is connected

to the free NIM port of the

“Big HIRS” .The

hardware structures of the

whole system don’t need

any change.

• In BSS,any subsystem

can communicate with

others，if it is connected

to the free NIM port of the

“Big HIRS” .The

hardware structures of the

whole system don’t need

any change.

BSS Logical Structure


Modules DefinitionBSC Base Station Controller

CDSU：Channel Data Service UnitHIRS ： High-speed Interconnect

Router Subsystem NCM：Network Control ModuleNIM：Network Interface ModuleCPS：Call Processing Sub-systemCPM：Call Processing ModulePAM：Power Alarm ModuleBSM：Base Station Management

SVBS：Selector Vocoder Bank Subsystem

SVICM：Selector Vocoder Interface Control Module

SVM： Selector Vocoder ModulePCFS： Packet Control Function

SystemPCFIM：Packet Control Function

Interface ModulePCF： Packet Control FunctionTS： Timing SubsystemTCM： Timing Control ModuleGPSTM：GPS Timing Module


Modules Definition

BTS Base Transceiver Station

BDS：Baseband Digital System CCM：Communication Control

ModuleCHM：Channel-element ModuleRFIM：RF Interface ModuleBTS_CDSUSAM：Site Alarm ModuleRFS：Radio Frequency Sub-systemTRX：Transmitter and Receiver HPA：High Power AmplifyerRFE：Radio Frequency End

TFS：Timing Frequency Sub-system

TCM：Timing Control ModuleFDM：Frequency Distribution

ModuleGPSTM：GPS Timing Module


ZXC10-BSS Features• 1. Advancedness: The system makes use of a lot of advanced

technologies, for example high-speed packet switching. • 2. Forward compatibility: The system is designed by fully

considering the transition to the third-generation (3G) mobile communication system.

• 3. High integrity: ZXC10-BSS makes usage of a lot of advanced components to improve system integrity and reduce board types and amount.

• 4. High reliability: The amount of boards in the system is reduced. Important boards of the system adopt 1+1 or N+1 redundancy configuration and software error tolerance design.

• 5. Configuration flexibility: In addition to supporting traditional networking modes, ZXC10-BSS also realizes the daisy chain connection mode for up to 4 BTSs. According to the requirements, each BTS can be confiured into 1TRX/1-sector to 4TRX/3-sectors.

• 6. Supporting rich service types: ZXC10-BSS supports voice calls (8K, 13K, 8K EVRC voice coding), test calls , data calls, circuit-type data services , and supplementary services.

• 1. Advancedness: The system makes use of a lot of advanced technologies, for example high-speed packet switching.

• 2. Forward compatibility: The system is designed by fully considering the transition to the third-generation (3G) mobile communication system.

• 3. High integrity: ZXC10-BSS makes usage of a lot of advanced components to improve system integrity and reduce board types and amount.

• 4. High reliability: The amount of boards in the system is reduced. Important boards of the system adopt 1+1 or N+1 redundancy configuration and software error tolerance design.

• 5. Configuration flexibility: In addition to supporting traditional networking modes, ZXC10-BSS also realizes the daisy chain connection mode for up to 4 BTSs. According to the requirements, each BTS can be confiured into 1TRX/1-sector to 4TRX/3-sectors.

• 6. Supporting rich service types: ZXC10-BSS supports voice calls (8K, 13K, 8K EVRC voice coding), test calls , data calls, circuit-type data services , and supplementary services.





Main Content

BSC Overview

BSC Subsystem Introduction


BSC Overview

BSC System Structure

BSC Electric Features

BSC Mechanical Feature

BSC Logical Structure

BSC Performance Features


BSC System Structure

TCM

BTSBTSBTS

LAN

TO OMC

ATM

BSC

MSC

E1

NCM

Gps orGlonass

ATMGATEWAY

Other BSC

B-HIRS

S-HIRSSVICM

SVM SVMSVM

SVBS

S-HIRSPCFIM

PCFM PCFM PCFM

PCFS

PDSN

CDSU

PCFS

PCFS

SVBS

SVBS

Ethernet

CDSU CDSUCDSU CPS


BSC Electric Features

• BSC working environment requirement Working temperature: 0°C ~+55°CWorking humidity: 15%~93% The density of dust in the equipment room with diameters of over 5μm should be ≤3*104 granules/m3.

• Power requirement BSC DC power

• 1)Voltage amplitude: The nominal voltage value of the BSC power supplied by the power equipment in the equipment room is -48V. The permitted variation range is -57V~-40V.

• 2)The noise level index contained in the DC power voltage should satisfy the requirement in the overall technical specifications by the former MPT.

• 3)DC power should provide over-voltage

• BSC working environment requirement Working temperature: 0°C ~+55°CWorking humidity: 15%~93% The density of dust in the equipment room with diameters of over 5μm should be ≤3*104 granules/m3.

• Power requirement BSC DC power

• 1)Voltage amplitude: The nominal voltage value of the BSC power supplied by the power equipment in the equipment room is -48V. The permitted variation range is -57V~-40V.

• 2)The noise level index contained in the DC power voltage should satisfy the requirement in the overall technical specifications by the former MPT.

• 3)DC power should provide over-voltage


BSC Mechanical Feature

• BSC comprises the central rack and the vocoder rack. • The central rack and the vocoder rack adopts the unified racks and

standard plug-in boxes, which provide different functions due to the use of different plug-in unis.

• From top to bottom, each rack includes one distribution plug-in box, 3~5 functional plug-in boxes, one fan plug-in box, and dust-proof shelf. There are four types of functional plug-in boxes.

HIRS plug-in boxesSVBS plug-in boxesCDSU plug-in boxesPCFS plug-in boxes

One plug-in box can include 22 plug-in modules/boards at the most

• BSC comprises the central rack and the vocoder rack. • The central rack and the vocoder rack adopts the unified racks and

standard plug-in boxes, which provide different functions due to the use of different plug-in unis.

• From top to bottom, each rack includes one distribution plug-in box, 3~5 functional plug-in boxes, one fan plug-in box, and dust-proof shelf. There are four types of functional plug-in boxes.

HIRS plug-in boxesSVBS plug-in boxesCDSU plug-in boxesPCFS plug-in boxes

One plug-in box can include 22 plug-in modules/boards at the most


BSC Rack Structure

FAN

PCFS

PCFS

PCFS

PCFS

PCFS

PD

FAN

SVBS

SVBS

SVBS

SVBS

SVBS

PD

FAN

SVBS

SVBS

SVBS

SVBS

SVBS

PD

FAN

CDSU(2)

CDSU(2)

CDSU(1)

HIRS

HIRS

PD

FAN

SVBS

SVBS

SVBS

SVBS

SVBS

PD

FAN

SVBS

SVBS

SVBS

SVBS

SVBS

PD

FAN

SVBS

SVBS

SVBS

SVBS

SVBS

PD

第1架第3架第5架第7架第2架第4架第6架Rack7 Rack5 Rack3 Rack1 Rack2 Rack4 Rack6

Center RackCenter Rack

Center RackCenter Rack


Center Rack


Vocoder RackPCFIM

PCF

PCF

PCF

PCF

PCF

PCF

PCF

PCF


BSC Logical Structure

Sub-systemSub-system

ModuleModule

ElementElement


BSC Performance feature• 1 It can provide up to 240 E1s to be connected with LE; • 2 It can support up to 7200 selectors/vocoders; • 3 Its maximum traffic processing ability is up to 5040Erl; • 4 It can be connected with up to 380 BTSs; • 5 It supports data calls originated by MS, LE or PDSN. • 6 It supports circuit-type data services (asynchronous dataand G3 fax) and high-speed packet data services of up to 153.6kbps; • 7 It supports star, chain and ring networking of BTS and provides the daisy chain connection function of BTS;• 8 The maximum amount of PPP connections supported by packet data reaches 40,000; • 9 It supports a variety of soft handover modes: intra-BTS soft handover,intra-BSC soft handover, and inter-BSC soft handover;

• 1 It can provide up to 240 E1s to be connected with LE; • 2 It can support up to 7200 selectors/vocoders; • 3 Its maximum traffic processing ability is up to 5040Erl; • 4 It can be connected with up to 380 BTSs; • 5 It supports data calls originated by MS, LE or PDSN. • 6 It supports circuit-type data services (asynchronous dataand G3 fax) and high-speed packet data services of up to 153.6kbps; • 7 It supports star, chain and ring networking of BTS and provides the daisy chain connection function of BTS;• 8 The maximum amount of PPP connections supported by packet data reaches 40,000; • 9 It supports a variety of soft handover modes: intra-BTS soft handover,intra-BSC soft handover, and inter-BSC soft handover;


Main Content

BSC Overview

BSC Subsystems Introduction


BSC Subsystem Introduction

HIRS： High-speed Interconnect RoutingSubsystem

CPS： Call Processing SubsystemCDSUS：Channel Data Service Unit SubsystemTS： Timing SubsystemSVBS： Selector and Vocoder SubsystemPCFS： Packet Control Function SubsystemBSM： Base Management Subsystem


High-speed Interconnect Routing Subsystem

• HIRS Subsystem is switching center and packet data exchange platform of BSC.

• Functions of HIRS：Packet data switching

Timing distribution，monitor GPS

Software downloading

Operation and maintenance management on the whole BSS

• HIRS Subsystem is switching center and packet data exchange platform of BSC.

• Functions of HIRS：Packet data switching

Timing distribution，monitor GPS

Software downloading

Operation and maintenance management on the whole BSS

•The network structure of CDMA BSS is of two levels:

---The first level is HIRS subsystem in BSC, which is

called “big HIRS”. It is the packet data switching center of the system.

---The second level is the packet data switching network with relatively low speed formed in SVBS or BDS subsystem, which is called “small HIRS”. It mainly provides packet data switching services for modules in SVBS or BDS subsystem

•The network structure of CDMA BSS is of two levels:

---The first level is HIRS subsystem in BSC, which is

called “big HIRS”. It is the packet data switching center of the system.

---The second level is the packet data switching network with relatively low speed formed in SVBS or BDS subsystem, which is called “small HIRS”. It mainly provides packet data switching services for modules in SVBS or BDS subsystem


DISCO Bus Working Principle

The system architecture of the whole HIRS is a fast packet switching network based on shared storage (bus type), two unidirectional buses – convergence bus and distribution bus

The system architecture of the whole HIRS is a fast packet switching network based on shared storage (bus type), two unidirectional buses – convergence bus and distribution bus

1.CO bus (Consolidation BUS) functions as convergence bus. Under the mediation and control of NCM module and U-type gateway, by time-sharing ；

2.Upon receiving the data frames from convergence bus, U-type gateway distributes them to the HIRS serial port or the distribution bus according to the destination addresses of the data frames ；

3.DIS bus (Distribution BUS) functions as broadcast distribution bus. The data frames from the ATM interface and the convergence bus are sent to the distribution bus by means of broadcast distribution under the control of U-type gateway ；

4.The NIM at the same time receive the broadcast data frames on the distribution bus, and determine whether to accept the data frame according to the node number of the destination address 。


HIRS Shelf Structure

• The HIRS network may comprise up to two HIRS shelves. One HIRS shelf is enough if the system capacity is little. Each HIRS shelf has 22 slots. The two slots in the middle are for NCM boards, and nine slots at either side are for NIM boards.

• The HIRS network may comprise up to two HIRS shelves. One HIRS shelf is enough if the system capacity is little. Each HIRS shelf has 22 slots. The two slots in the middle are for NCM boards, and nine slots at either side are for NIM boards.

PSMB

NIM

NIM

NIM

NIM

NIM

NIM

NIM

NIM

NIM

NCM

NCM

NIM

NIM

NIM

NIM

NIM

NIM

NIM

NIM

NIM

PSMB


HIRS Structure

NCMNCM

NIM NIM

disco

7 0 7 0

NCMNCM

NIMNIM

dis

co

077

BSC_CDSU

BSM

TS

TOD clkclk Ethernet InterfaceHIRS

CPMCPM

CPS

422

I 2 CI 2 CU

GatewayU

Gateway

Un E1SVBS

BTS_CDSU

BDS

BTS_CDSU

BDS

BTS_CDSU

BDS

CDSUSBSC_CDSU

PCFS

Un E1


NCM – Network Control Module

NCM is the core module of the HIRS shelf and its CPU system functions as an independent unit. It communicates with other boards of the system and monitors the whole system. Its performance has a direct effect on the HIRS and the whole system, so active/standby NCM boards are designed.

NCM provides the following functions:1) Controlling HIRS network traffic.2) Distributing module software and configuration information;3) Detecting, isolating, reporting and recovering the faults of HIRS

network;4) Distributing GPS clocks;5) Managing the operation and maintenance of the whole BSS.

NCM is the core module of the HIRS shelf and its CPU system functions as an independent unit. It communicates with other boards of the system and monitors the whole system. Its performance has a direct effect on the HIRS and the whole system, so active/standby NCM boards are designed.

NCM provides the following functions:1) Controlling HIRS network traffic.2) Distributing module software and configuration information;3) Detecting, isolating, reporting and recovering the faults of HIRS

network;4) Distributing GPS clocks;5) Managing the operation and maintenance of the whole BSS.


Front Panel Indicators and Buttons

ID Colr Name Status Meaning

RUN

Green

Indicator of running status

Flash three times per second (when the module is powered on): Indicating BOOT is running. If the indicator does not flash three times when the module is powered on, it generally means that this board enters the debugging mode or the BOOT chip is faulty. Off: BOOT starts to load the version program in FLASH. If this indicator is not on after the module flashes three times, this board has no version program. Always on: Indicating that the version starts to run and attempts to obtain the address. Flashing fast (0.3s on and 0.3s off): Indicating normal running.Flash swiftly (70ms on and 70ms off): Indicating that the communication with CPM is interrupted or the communication with the host is interrupted (when it is standby).

ALM Red Indicator of alarm

status

Off: Indicating that no fault is found inside the module. Always on: Indicating intra-module faults. Flashing fast: Indicating that GPS has not entered the normal running status (including warm-up).

ACT Green

Active/standby indicator

On: Active;Off: Standby


NCM Module Layout

X2

X1

X3

X4

X9

X7


1. NCM front panel interface1) Earthnet interface

The Ethernet interface is located on the front panel and at position number X9. It is a standard Ethernet RJ45 interface. Marked as “Test”on the panel, it connects with the background (can be used to debug modules)

2) RS232 interface

Located on the front panel, RS232 interface is at position number X7 and is a standard DB9 RS232 interface for debugging.

NCM Module Outside Interface（1）


2. NCM backplane interface

1） Interface Layout

The interface layout of the NCM backplane is shown on the right

2）Interface descriptions （up to below）

inter-shelf interconnecting ATM interfaces (ATM1 and ATM2, reserved)

Ethernet interface,

HIRS serial interface connected with NIM

the serial interface connected with PAM

the serial interfaces connected with GPSTM and TCM.

NCM Module Outside Interface （2）


NIM （Network Interface Module）

NIM, short for Net Interface Module, is located in the HIRS plug-in shelf. It is an interface unit for the port devices in CDMA BSS to access the HIRS network.

Each HIRS plug-in shelf holds 18 NIM boards, 16 of which are active boards and the other 2 are standby boards. The active and standby boards adopt dual N+1 backup mode and daisy chain changeover mode.

Each NIM provides 8 HIRS serial ports. The node number of NIMs in the HIRS plug-in shelf and number of ports in each module are shown in next picture

NIM, short for Net Interface Module, is located in the HIRS plug-in shelf. It is an interface unit for the port devices in CDMA BSS to access the HIRS network.

Each HIRS plug-in shelf holds 18 NIM boards, 16 of which are active boards and the other 2 are standby boards. The active and standby boards adopt dual N+1 backup mode and daisy chain changeover mode.

Each NIM provides 8 HIRS serial ports. The node number of NIMs in the HIRS plug-in shelf and number of ports in each module are shown in next picture


NCM

NCM

2 3 4 5 6 7 8 9 10 13 1514 16 17 1918 20 2111 12

0 1 2 3 4 5 6 7 9 A B C D E F8

节点地址

０

1

2

3

4

5

6

7

端口地址

槽位号

NIM Network Address Allocation

Node address

Port address

Slot number


NIM Address Examples

NCM

NCM

2 3 4 5 6 7 8 9 10 13 1514 16 17 1918 20 2111 12

NCM

NCM

2 3 4 5 6 7 8 9 10 13 1514 16 17 1918 20 2111 12

0 1 2 3 4 5 6 7 9 A B C D E F8

Node address

０

12

3

45

67

Port address

Slot No.

CPM address

BSSId = X，Subnet= 0，

Node ID = 7，Port address = 7；

NCM address

BSSId = X，Subnet = 0，

Node ID= 7，Port address = 6；



ID Color Name Status Meaning Normal Status

RUN GreenIndicator of running status

Always on: Indicating that the module logic is lost during module power-on or the working processFlashing fast (three times per second): Indicating that the module is working normally.

It is on for one second and off for another second.

ALM Red Indicator of alarm status

Always on: Indicating that the logic loading fails, receiving and transmitting bus clock is lost, the module fails to be opened or convergent bus request fails. Flashing slowly (once/2.5s): Indicating that the IIC bus is unavailable. Flashing fast (three times per second): Indicating that memory self-check can not pass. Off: Indicating that the module is working normally.

Always off:

ACT Green Active/standby indicator

Always on: Indicating that this board is the active board, FPGA configuration fails or logic is lost. Off: Indicating that this board is the standby board.

Always on/off






Radio resource management and allocation；Terrestrial circuit resource management ；The processing of the MTP3 and SCCP of SS7；

Processing of the signaling over Abis interface connected to BTS-CCM；Database mangement, including BSS parameter, terrestrial resource data, service channel resource,call record data, and performance data；it is the monitoring center of the BSC, responsible for monitoring the power supply and environment and reporting the alarm signals.

CPM

CPS Subsystem

CPS, short for Call Processing Subsystem, is the hub of resourceManagement and call signaling protocol processing of the BSS ，It is responsible for the call signaling processing of the whole BSS。

CPS, short for Call Processing Subsystem, is the hub of resourceManagement and call signaling protocol processing of the BSS ，It is responsible for the call signaling processing of the whole BSS。


CPM Modules

CPM, short for call processing module, is located in the CDSU plug-in shelf of the ZXC10-BSC and belongs to the CPS.CPM provides Abis interface signaling processing of the whole CDMA BSS system, manages and allocates radio resources, manages terrestrial circuit resources, and processes the MTP3 and SCCP parts of No. 7 signaling.It is the center for BSS system management and signaling processing. It works in 1+1 hot backup mode and occupies two slots.

CPM, short for call processing module, is located in the CDSU plug-in shelf of the ZXC10-BSC and belongs to the CPS.CPM provides Abis interface signaling processing of the whole CDMA BSS system, manages and allocates radio resources, manages terrestrial circuit resources, and processes the MTP3 and SCCP parts of No. 7 signaling.It is the center for BSS system management and signaling processing. It works in 1+1 hot backup mode and occupies two slots.

CDSU

PSMB

CDSU

CDSY

CDSU

CDSU

CDSU

CDSU

CDSU

CDSU

GPSTM

TCM

GPSTM

CPM

CPM

PAM

PSMB

CDSU

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22


CPM Module Working Principle

General processor system

WATCHDOG LOGIC

Communication interface

Active/standby interface

Power

Debugging network port

Debugging serial port

Backplane

External memory

Important configuration data will be saved here!Important configuration data will be saved here!


Front Panel Indicators and Buttons ID Color Name Status Meaning Normal Status

RUN

Green


Always on: Indicating requesting the network address (BSSID) from the NCM. If it is always on, there are two kinds of meanings: 1. network address (BSSID) is not obtained; 2. the system has input power and the module is faulty.Always off: Indicating no input power or faulty module. 3 Hz flashing (when the module is powered on): Indicating that BOOT is beginning the startup. Flashing fast (0.3s on and 0.3s off): Indicating normal running. Flashing slowly (1.5s on and 1.5s off): Indicating loading status. If it always flashes slowly, generally, the synchronization between the foreground and background databases fail. Flash swiftly (70ms on and 70ms off): Indicating that the communication with NCM is interrupted or the communication with the host is interrupted (when it is standby).

Flashing fast (0.3s on and 0.3s off)

ALM

RedIndicator of alarm status

Always off: Indicating no fault. Always on: Indicating a fault. Off

ACT Green


Always on: Indicating active module; Always off: Indicating standby module. Always on/off


ID Name Function Descriptions

M/S Active/standby changeover button

When this button on the active board is pressed, active/standby changeover is implemented, if the standby board works normally; this button is invalid if the standby board has not been inserted or is faulty. When this button on the standby board is pressed, this button isinvalid.

RST Resetting button. When this button is pressed, the module is reset.



PAM Module

PAM provides the following functions：

1) Sending alarm signals to the NCM board automatically, receiving and executing the control commands from the NCM board.

2) Collecting alarm signals of power supply and fan sent from power supply modules.

3) Monitoring the smoke alarms.4) Monitoring the temperature and humidity of the equipment room.5）Providing standby input/output interface.

• PAM is located in the BSC-side CDSU sub-rack. It monitors the running statuses of power modules of the BSC-side sub-racks and environment signals such as the temperature, humidity and smoke of the equipment room. After which, it reports the results to the background OMC through NCM for processing.

• PAM is located in the BSC-side CDSU sub-rack. It monitors the running statuses of power modules of the BSC-side sub-racks and environment signals such as the temperature, humidity and smoke of the equipment room. After which, it reports the results to the background OMC through NCM for processing.






CDSUS Subsystem

The BSC-CDSU and the BTS-CDSU are the same in hardware and working principles, different only in the widths of their panels (BSC-CDSU has a wider panel).

There are two types of CDSU modules with different interface capacities: CDSU with 2 E1 and CDSU with 4 E1.

As the trunk unit, it provides the external standard E1 interface and transfers the non-timeslot-based packet data.

It is located at BSC and BTS sides.

It converts data between internal network interface and E1 interface. BSC and BTS are connected through E1 interface.

As the trunk unit, it provides the external standard E1 interface and transfers the non-timeslot-based packet data.

It is located at BSC and BTS sides.

It converts data between internal network interface and E1 interface. BSC and BTS are connected through E1 interface.


CDSU’s Function

B S C

B T S 0

B T S 1

B T S 2

B T S 3

B S CBTS0 BTS1 BTS2

Popular in urbon area Used in some rural area

E1CDSU will be used both sides.

Take care the connection!


4*E1 interfaces connected with BTS

CDSU Module

Connected with NIM via RS422 port

BSC-CDSU Module Working Principle


BTS CDSU Dip Settingin the Connection with BSC

Attention:when dip to on，means：0 ，to off，means：1。

For example， PATH_I=1 like below

Attention:when dip to on，means：0 ，to off，means：1。

For example， PATH_I=1 like below

BTS Dip setting



R U N

A L M

R S T

C D S U

D T 0

D T 1

R U N

A L M

R S T

C D S U

D T 0

D T 1

D T 2

D T 3

ID Color Name Status Meaning Normal

Status

RUN

Green


Always on: Indicating that the module is detected as normal and it is powered on. Always off: Indicating no input power or faulty module. Flashing fast (0.3s on and 0.3s off): Indicating normal running. Flashing slowly (1.5s on and 1.5s off): If ALM indicator is flashing slowly at the same time, it indicates the debugging mode. Flashing fast (70ms on and 70ms off): Indicating no serial communication port clock.

Flashing fast (0.3s on and 0.3s off)

ALM

RedIndicator of alarm status

Always off: Indicating no fault. Always on: Indicating a fault. Flashing slowly: If RUN indicator is flashing slowly at the same time, it indicates the debugging mode. Flashing fast: Indicating that a fault is detected and is to reset.

Always off:Flash slowly

DT0

Green

DT0 indicator

Always on: Indicating normal DT0 synchronization. Always off: Indicating faulty DT0. Flashing: Indicating faulty DT0 synchronization.

Always on


DT1

Green

DT1 indicator


Always on

DT2

Green

DT2 indicator(only for 4-

E1 CDSU module).


Always on

DT3

Green

DT3 indicator(only for 4-

E1 CDSU module).


Always on

R U N

A L M

R S T

C D S U

D T 0

D T 1

R U N

A L M

R S T

C D S U

D T 0

D T 1

D T 2

D T 3



ASM（ATM Switching Module）

In the CDMA system, BSCs communicate with

each other through ASM to implement

inter-BSC soft handoff.

It provides the external standard E1 interface

and specifies load sharing and backup

between E1 links.

There are two types of ASMs providing different

bandwidth of communication links: the ASM

providing 2 E1 interfaces and the ASM

providing 4 E1 interfaces.

MSC

SVBS

HIRS

MSC

SVBS

HIRS

Af1Af1

Df1Df1

Bf1Bf1 E

f1Ef1

Cf1Cf1 F

f1Ff1

Uf1Uf1

Xf1Xf1

Vf1Vf1 Y

f1Yf1

Wf1Wf1 Z

f1Zf1

CDMA Soft-handoff

ASM






TS-Timing Subsystem

CHM1GPSTM TCM

CHM1NCM1 CHM1NCM2

TS

According to the CDMA standard,BSC and BTS independently synchronization the timing signal provided by GPS.

Timing subsystem provides such timing signal:

*PP2S*16chips：19.6608MHz*TOD message

According to the CDMA standard,BSC and BTS independently synchronization the timing signal provided by GPS.

Timing subsystem provides such timing signal:

*PP2S*16chips：19.6608MHz*TOD message


TS Shelf Structure

It consists of 2 GPSTMs and 1 TCM, and GPSTM adopts a mode of dual redundancy and hot backup. Physically, it is located in the control shelf, which is numbered from left to right, and it is in slots 17 ~ 20Each GPSTM provides 2 16CHIP and 2 PP2S outputs, and provides 2 TOD messages, one of which is used in the local rack, and the other is used in the extended rack. TCM outputs 2 10 MHz, 4 16CHIPs and 4PP2Ss, two of which are used in the local rack, and the other is used in the extended rack.

It consists of 2 GPSTMs and 1 TCM, and GPSTM adopts a mode of dual redundancy and hot backup. Physically, it is located in the control shelf, which is numbered from left to right, and it is in slots 17 ~ 20Each GPSTM provides 2 16CHIP and 2 PP2S outputs, and provides 2 TOD messages, one of which is used in the local rack, and the other is used in the extended rack. TCM outputs 2 10 MHz, 4 16CHIPs and 4PP2Ss, two of which are used in the local rack, and the other is used in the extended rack.

PSMB

CDSU

CDSU

CDSU

CDSU

CDSU

CDSU

CDSU

CDSU

CDSU

CDSU

CPM

CPM

CPM

CPM

PAM

GPSTM

TCM

GPSTM

PSMB


GPSTM Specification

In the CDMA mobile Communication system, the synchronization may be transmission synchronization and radio synchronization. The radio synchronization adopts the GPS synchronization in the CDMA system, that is, the radio interfaces of the whole cellular system should be synchronized at a standard GPS time.

In the ZTE CDMA system, the synchronization timing solution requires: BTS and BSC are synchronized in the standard time signal provided by the GPS. GPSTM is just the module that provides the standard time signal and relevant system reference for BTS and BSC, and it is the key module in the CDMA system.

In addition, GPSTM has hold-on function when it cannot find the satellite. The requirement is that the wander should not exceed 10 ms in 24 hours but the GPSTM of our system can keep the wandering within 10 ms for 72 hours

In the CDMA mobile Communication system, the synchronization may be transmission synchronization and radio synchronization. The radio synchronization adopts the GPS synchronization in the CDMA system, that is, the radio interfaces of the whole cellular system should be synchronized at a standard GPS time.

In the ZTE CDMA system, the synchronization timing solution requires: BTS and BSC are synchronized in the standard time signal provided by the GPS. GPSTM is just the module that provides the standard time signal and relevant system reference for BTS and BSC, and it is the key module in the CDMA system.

In addition, GPSTM has hold-on function when it cannot find the satellite. The requirement is that the wander should not exceed 10 ms in 24 hours but the GPSTM of our system can keep the wandering within 10 ms for 72 hours



RUN

ACT

GPSALM

1PPSALM

ALM

CONTROL

GPSTM

RST

10MHz

ON

OFF

PWR

ID Color Name Status Meaning Normal

Status

RUN Green


Always on: Indicating normal working status. Off: Indicating abnormal working status.

Always on

ACT Green


Always on: Indicating active status; Off: Indicating standby status; On

GPSALM Red GPS alarm

indicator

Always on: Indicating that the device is in the initialization status, lose-lock status and the status of receiving no satellite. On for 1s and off for another 1s: Indicating that GPS antenna is break down. Off: Indicating that the GPS receiving module is in the normal working status.

Off

1PPSALM Red Second pulse

alarm indicator

Always on: Indicating that the precision of 1PPS to be detected exceeds the required range (800 ns)Off: Indicating that the precision of 1PPS complies with the required range.

Off

ALM Red Indicator of alarm status

Always on: Indicating abnormal running. Off: Indicating normal running. Off


TCM－Timing Control Module

It belongs to the TFS and is located on CDSU plug-in shelf in BSC. It receives 10MHz from the active/standby GPSTM, and then synthesizes and distributes them. At the same time, it receives PP2S and 16CHIP from the active/standby GPSTM, performs phase-locking and generates new PP2S and 16CHIP.

It is the signal hub connecting the active and standby GPSTMs, so that the active/standby GPSTMs can maintain continuous PP2S and 16CHIP and prevent call drops. Unreliable components are reduced so that the circuit is simplified. Heating effect and electromagnetic compatibility are also considered in the overall design, therefore the module reliability is ensured.

It belongs to the TFS and is located on CDSU plug-in shelf in BSC. It receives 10MHz from the active/standby GPSTM, and then synthesizes and distributes them. At the same time, it receives PP2S and 16CHIP from the active/standby GPSTM, performs phase-locking and generates new PP2S and 16CHIP.

It is the signal hub connecting the active and standby GPSTMs, so that the active/standby GPSTMs can maintain continuous PP2S and 16CHIP and prevent call drops. Unreliable components are reduced so that the circuit is simplified. Heating effect and electromagnetic compatibility are also considered in the overall design, therefore the module reliability is ensured.



R U N

A L M

L O C K

C L K

P P 2 S

T C M

ID Color Name Status Meaning

RUN

Green


Always on: Indicating entering the normal working status. Always off: Indicating fault.

LOCK

Green

Indicator of locked status

Always on: Indicating that the internal phase-locking loop is locked. Always off: Indicating that the internal phase-locking loop is unlocked.

ALM Red Indicator of

alarm status

Always off: Indicating no fault. Always on: Indicating alarm status and the internal phase-locking loop is unlocked.

Interface ID Functions Descriptions

CLK Output 16CHIP for debugging Unconnected during running

PP2S Output PP2S for debugging Unconnected during running






SVBS Subsystem

• SVBS is short for Selector & Vocoder Bank Subsystem. Located in the BSC of BSS, SVBS is the core in the CDMA for implementing voice services and circuit-based data services and supporting the MTP1 and MTP2 of SS7.

• It is the junction center of the connection between BSC and MSC and is the platform for processing and switching voice. All the SVBSs in the same BSC form the vocoder resource pool together.

• Physically, a half selector & vocoder plug-in shelf forms an SVBS, which consists of 1 SVICM/ESVICM and 8 SVMs.

• SVBS is short for Selector & Vocoder Bank Subsystem. Located in the BSC of BSS, SVBS is the core in the CDMA for implementing voice services and circuit-based data services and supporting the MTP1 and MTP2 of SS7.

• It is the junction center of the connection between BSC and MSC and is the platform for processing and switching voice. All the SVBSs in the same BSC form the vocoder resource pool together.

• Physically, a half selector & vocoder plug-in shelf forms an SVBS, which consists of 1 SVICM/ESVICM and 8 SVMs.


SVBS Shelf Structure

Mechanically, a plug-in shelf has two SVBSs. One or more SVBS plug-in shelves can be configured according to the capacity. SVBS plug-in shelf has 22 slots, numbered 1 ~ 22 from left to right. Slots 11 and 12 are blank; slots 10 and 13 hold SVICMs; slots 2 ~ 9 and 14 ~ 21 hold SVMs; slots 1 and 22 at the two sides hold power modules.The SVBS can simultaneously provide 15 × 8 = 120 selector & vocoderresources and 4 E1 channels connected with MSC for transmitting the service data of A interface, with timeslot 16 of an E1 channel used as the physical channel No. 7 signaling link

Mechanically, a plug-in shelf has two SVBSs. One or more SVBS plug-in shelves can be configured according to the capacity. SVBS plug-in shelf has 22 slots, numbered 1 ~ 22 from left to right. Slots 11 and 12 are blank; slots 10 and 13 hold SVICMs; slots 2 ~ 9 and 14 ~ 21 hold SVMs; slots 1 and 22 at the two sides hold power modules.The SVBS can simultaneously provide 15 × 8 = 120 selector & vocoderresources and 4 E1 channels connected with MSC for transmitting the service data of A interface, with timeslot 16 of an E1 channel used as the physical channel No. 7 signaling link

PSMB

SVM

SVM

SVM

SVM

SVM

SVM

SVM

SVM

SVICM

PSMB

SVM

SVM

SVM

SVM

SVM

SVM

SVM

SVM

SVICM


SVBS Working Principle

NIM

U Gateway422

Selector/VocoderControl

/

SVM1

SVM7

SVM8

CODIS

SVICM

C_BUS

SVBS

Digital Trunk Interface

4 HW

MSC

Timing

4 E1

I2 C

Timing

Similar to the whole HIRS structure, SVBS also adopts a fast packet switching network based on shared storage (bus type) and has a hierarchical and modular structure, so it is called “Small HIRS”.

Similar to the whole HIRS structure, SVBS also adopts a fast packet switching network based on shared storage (bus type) and has a hierarchical and modular structure, so it is called “Small HIRS”.


SVICM(Selector Vocoder Interface Control Module)

1. Controlling and maintaining the SVMs in the SVBS.2. Maintaining and managing the running software and configuration

data in the local SVBS.3. Communicating with the HIRS network.4. Obtaining TOD information through the gateway and the

receiving/transmitting bus interface unit, and broadcasting to all SVMs.5. Obtaining, through the gateway and the receiving/transmitting bus

interface unit, the clock signals from GPSTM and distributing them to theSVMs.

As the connection link between the SVBS and other parts of the BSSand as the physical channel between the BSS and MSC, the SVICM implements the following functions:

As the connection link between the SVBS and other parts of the BSSand as the physical channel between the BSS and MSC, the SVICM implements the following functions:



A L M

D T O

D T 1

D T 2

D T 3

R S T

T E S T

R S 2 3 2

S V I C M

R U N


RUN Green Indicator of running status

Flash three times per second (when the module is powered on): Indicating BOOT is running. If the indicator does not flash three times when the module is powered on, it generally means that this board enters the debugging mode or BOOT chip is faulty. Off: BOOT starts to load the version program in FLASH. If this indicator is not on after flashing three times, this board has no version program. Always on: Indicating that the version starts to run and attempts to obtain the address. Flashing fast (0.3s on and 0.3s off): Indicating normal running. Flash swiftly (70ms on and 70ms off): Indicating that the communication with CPM/NCM is interrupted or the communication with the host is interrupted (when it is standby).

ALM Red Indicator of alarm status Off: Indicating that no fault is found inside the module. Always on: Indicating intra-module faults.

DT0~DT3 Green E1 status indicator On: Indicating that E1 is accessed normally.

Off: Indicating that there is fault in accessing E1.

TEST Network interface for debugging Unconnected during running

RS232 Serial interface for debugging Unconnected during running

RST Reset button. For resetting the module manually.


SVM, short for Selector/Vocoder Module, belongs to the SVBS and is located in the SVBS plug-in shelf. It provides vocoder and selector functions. It is connected via dual buses to the SVICM and then connected to the big HIRS to serve as the vocoder resource pool.

SVM, short for Selector/Vocoder Module, belongs to the SVBS and is located in the SVBS plug-in shelf. It provides vocoder and selector functions. It is connected via dual buses to the SVICM and then connected to the big HIRS to serve as the vocoder resource pool.

SVM

SVM units have the following functions: 1. Main control unit

Controlling SVE and data interface; providing functions of the selector and power control; detecting and reporting faults.

2. Data interface unitProviding a packet data interface for the communication in the

BSS. 3. Time slot interface unit

Implementing PCM clock conversion and providing PCM code flow data channel for SVE;

4. SVE unit(15 in 1 SVM, 120 in 1ESVM)Converting PCM and QCELP.



R U N

A L M

R S T

S V M

T E S T

R S 2 3 2


RUN Green Indicator of running

status

Always on: Indicating input power and a fault. Always off: Indicating no input power or faulty module. 1Hz flashing (0.5s on and 0.5s off): Indicating normal running. 0.25 Hz flashing: Indicating that the module is loading the software. 5Hz flashing: Indicating that the receiving and transmitting bus communication is faulty.

ALM Red Indicator of alarm

status

Always off: Indicating no fault. Always on (such as high-frequency flashing): Indicating alarm status and a fault in the running.









PCFS Subsystem

Selecting the best-quality service path among multiple soft handoff paths to implement GRE encapsulation of data ；

Providing adaptation between GRE packets and RLP packets ；

Establishing, configuring and maintaining A8 and A10 links through A9 and A11 interfaces, establishing the PPP link between MS and PDSN for the packet data service transmission ；

Providing the interface with the internal communication network of the BTS

PCFS, short for Packet Control Functional Subsystem, is the minimum

physical unit in the resource sharing pool for implementing packet control

functionEach PCFS consists of 1 PCFIM and 8 PCF modules. It is connected

with PDSN through the PCFIM. The PCFIM provides a 10M/100M adaptive Ethernet physical interface

PCFS, short for Packet Control Functional Subsystem, is the minimum

physical unit in the resource sharing pool for implementing packet control

functionEach PCFS consists of 1 PCFIM and 8 PCF modules. It is connected

with PDSN through the PCFIM. The PCFIM provides a 10M/100M adaptive Ethernet physical interface


PCFS Self Structure

A half PCF plug-in shelf constitutes one PCFS, which contains 1 PCFIM and 8 PCFs.Mechanically, a plug-in shelf has two PCFSs. One or more PCFS plug-in shelves can be configured according to the capacity. PCFS plug-in shelf has 22 slots, numbered 1 ~ 22 from left to right. Slots 11 and 12 are blank; slots 10 and 13 hold PCFIMs; slots 2 ~ 9 and 14 ~ 21 hold PCFs;

A half PCF plug-in shelf constitutes one PCFS, which contains 1 PCFIM and 8 PCFs.Mechanically, a plug-in shelf has two PCFSs. One or more PCFS plug-in shelves can be configured according to the capacity. PCFS plug-in shelf has 22 slots, numbered 1 ~ 22 from left to right. Slots 11 and 12 are blank; slots 10 and 13 hold PCFIMs; slots 2 ~ 9 and 14 ~ 21 hold PCFs;

PCF

PCFIM

PSMB

PSMB

PCF

PCF

PCF

PCF

PCF

PCF

PCF

PCF

PCF

PCF

PCF

PCF

PCF

PCFIM

PCF

PCF

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22


PCFS Working Principle

The whole PCFS structure is a fast packet switching network based on dual buses and U gateway and has a hierarchical and modular structure. Dual buses, convergent bus and distribution bus, construct the framework of the small HIRS network switching platform.

The convergent bus is under the mediation and control of the U gateway of the PCFIM. PCFs send the data frame to the convergent bus. After the U gateway receives the data frames from the convergent bus, it distributes the data according to the data frame’s destination addresses: to HIRS serial interface to the NIM or distribution bus.

The whole PCFS structure is a fast packet switching network based on dual buses and U gateway and has a hierarchical and modular structure. Dual buses, convergent bus and distribution bus, construct the framework of the small HIRS network switching platform.

The convergent bus is under the mediation and control of the U gateway of the PCFIM. PCFs send the data frame to the convergent bus. After the U gateway receives the data frames from the convergent bus, it distributes the data according to the data frame’s destination addresses: to HIRS serial interface to the NIM or distribution bus.

RS422

To HIRSDual buses

10M/100M fast Ethernet

To PDSN

PCFIM

PCF1 PCF2 PCF8


PCFIM(Packet Control Function Interface Module)

It moderates the internal buses of the PCFS and is connected as a gateway to the big HIRS

Serving as the data receiving and transmitting interfaces of the internal level-2 switching platform of the PCFS

Receiving PP2S and 1.2288MHz clock signals, generating the clock signals required by the data bus inside the subsystem and distributing these clock signals to the PCF module

Providing A11/A9 signaling channel and A10/A8 service channel connected to PDSN.

PCFIM belongs to the PCFS and is located in the PCFS plug-in shelf. It provides packet control function and is connected to the PCF module through the internal dual buses, whichare the level-2 switching platform of the BSC. It moderates the internal buses of the PCFS and is connected as a gateway to the big HIRS.

PCFIM belongs to the PCFS and is located in the PCFS plug-in shelf. It provides packet control function and is connected to the PCF module through the internal dual buses, whichare the level-2 switching platform of the BSC. It moderates the internal buses of the PCFS and is connected as a gateway to the big HIRS.



PCFIM

RUN

ALM

RST

TEST

RS232


RUN Green


Status 1: It is on and off with ALM together, and then flashes 0.3s for 6 times, and flashes 0.1s for 4 times. It indicates that the module is resetting. Status 2: It flashes every 0.6s, indicating normal running.

Flashing evenly: flashing every 0.6s.


alarm status

Status 1: See Status 1 of RUN indicator. Status 2: Always on, indicating no receiving clock. Status 3: It flashes and then is off, indicating that a frame data may be lost or frame error may occur; or flashes frequently, indicating that lots of data are lost or lots of data frame errors occur, or the gateway is faulty.

Off





PCF(Packet Control Function Module )

It belongs to the PCFS and is located in the PCFS plug-in shelf .

PCF selects the multiple reverse service channel data in soft handoff and distributes the forward service channel data to different cells/sectors in soft handoff ；

It is connected to the PCFIM through the internal bus of the PCFS and is then attached to the HIRS to serve as SDU resource pool.

It belongs to the PCFS and is located in the PCFS plug-in shelf .

PCF selects the multiple reverse service channel data in soft handoff and distributes the forward service channel data to different cells/sectors in soft handoff ；

It is connected to the PCFIM through the internal bus of the PCFS and is then attached to the HIRS to serve as SDU resource pool.



PCF

RUN

ALM

RST

TEST

RS232


RUN Green


Status 1: It is on and off with ALM together, and then flashes 0.3s for 6 times, and flashes 0.1s for 4 times. It indicates that the module is resetting. Status 2: It flashes every 0.6s, indicating normal running.Status 3: It flashes every 0.8s, indicating requesting version program from the PCFIM. Status 4: It flashes every 0.2s for 5 times, indicating end of the version loading. Normally, Status 4 and Status 3 occur together.

Flashing evenly: flashing every 0.6s.


alarm status

Status 1: See Status 1 of RUN indicator. Status 2: Always on, indicating no receiving clock. Status 3: It flashes and then is off, indicating that a frame data may be lost or frame error may occur; or flashes frequently, indicating that lots of data are lost or lots of data frame errors occur, or the gateway is faulty. Status 4: It is off, indicating normal running.

Off









BSM Subsystem

BSM---CDMA BSS system maintenance and administration center

Fault management System toolsPerformance management Configuration managementSecurity management





Main Content

BTS Overview

BTS Subsystem Introduction

Typical Configuration


BTS Overview

BTS System Structure

BTS Electric Features

BTS Mechanical Feature

BTS Logical Structure

BTS Performance Features


BTS System Structure

Gps orGlonass

TCM RFIM

TRx HPA RFE

BTMCCM

CDSU

HIRS

CHMCHM

CHM


BTS Mechanical Overview

In each rack from top to below there are 5 shelves：

RFE plug-in box.

HPA plug-in box.

PSMD/PPM/PSMC plug-in box.

TRX plug-in box.

BDS plug-in box.

In each rack from top to below there are 5 shelves：

RFE plug-in box.

HPA plug-in box.

PSMD/PPM/PSMC plug-in box.

TRX plug-in box.

BDS plug-in box.

BTS include baseband digital subsystem BDS、radio frequency subsystem RFS and timing frequency subsystem TFS 4 subsystem in logical.

One BTS include 1 or 2 racks in physical.

BTS include baseband digital subsystem BDS、radio frequency subsystem RFS and timing frequency subsystem TFS 4 subsystem in logical.

One BTS include 1 or 2 racks in physical.


BTS Rack Structure

RFE Box

HPA Box

PSMD/PPM/PSMC

TRX Box

BDS Box

Slot for cable

Fan Box

Plug-in box for dust filtering

Base


BTS Logical Structure

Subsystem

Module/board

Element


BTS Functions

1.Supply Um interface to MS and Abis interface to BSC

2.Support 450MHz 800MHz 1900MHz；

3.Adopt high advanced packet switch technology

4.Flexible configuration,from O1 to S444

5.Support all sectors share CE in one carrier

6.Support star,chain,combined BTS connection

7.Support cell breath, satisfy the busy cell quality

1.Supply Um interface to MS and Abis interface to BSC

2.Support 450MHz 800MHz 1900MHz；

3.Adopt high advanced packet switch technology

4.Flexible configuration,from O1 to S444

5.Support all sectors share CE in one carrier

6.Support star,chain,combined BTS connection

7.Support cell breath, satisfy the busy cell quality


BTS Performance Specifications

1.Number of carrers：1、2、3、4

2.Number of sectors：Omni、2 sectors and 3 sectors

3.Connection to BSC：2E1 or 4E1

4.Channel Cappacity：IS95：20 vocie users/sector

CDMA20001x：35 voice users/sector，2*153.6Kbps data

users/sectors

5.Maxmum output power ：30W

6.Receive sensitity：-125dbm

7.One rack support S222，two racks support S444

8.Frequency range：800M/1900M/450M frequency band

1.Number of carrers：1、2、3、4

2.Number of sectors：Omni、2 sectors and 3 sectors

3.Connection to BSC：2E1 or 4E1

4.Channel Cappacity：IS95：20 vocie users/sector

CDMA20001x：35 voice users/sector，2*153.6Kbps data

users/sectors

5.Maxmum output power ：30W

6.Receive sensitity：-125dbm

7.One rack support S222，two racks support S444

8.Frequency range：800M/1900M/450M frequency band


BTS Specifications

BTS Dimensions

Appearance dimension: W×D×H = 750mm×600mm×1800 mm

Installation base dimension : W×D×H = 750mm×600mm×100 mm

BTS Dimensions

Appearance dimension: W×D×H = 750mm×600mm×1800 mm

Installation base dimension : W×D×H = 750mm×600mm×100 mm

BTS Working VoltadgeBSC and BTS Input DC：-48VVoltage floating range : -40V~-57VOther input voltage type：+5V，+27V，±12V

BTS Working VoltadgeBSC and BTS Input DC：-48VVoltage floating range : -40V~-57VOther input voltage type：+5V，+27V，±12V


BTS Power Consume

When HPA output power is 30W，BTS power consume is:

Power Working voltage/current

S111 -48V/28A1400W

S222 -48V/44A2200W

S333 -48V/72A3600W

S444 -48V/88A 4400W

When HPA output power is 30W，BTS power consume is:

Power Working voltage/current

S111 -48V/28A1400W

S222 -48V/44A2200W

S333 -48V/72A3600W

S444 -48V/88A 4400W


BTS Working Environment

Outdoor BTS:

Working temperature: -45°C~+55°C

Humidity : 5%~98%

Outdoor BTS:


Humidity : 5%~98%

Indoor BTS:


Humidity: 15%~85%

Indoor BTS:


Humidity: 15%~85%


Main Content

BTS Overview




BDS (Baseband Digital Subsystem)TFS (Timing Frequency Subsystem)RFS (Radio Frequency Subsystem)PS (Power Subsystem)

BTS Subsystem Main Content


Baseband Digital Subsystem－Main functions of the BDS

CDMA Baseband digital data forward modulation、sum、filter；

CDMA Baseband digital data reverse demodulation

Interface with RFS

Provide Abis Interface to BSC

control center of BTS, communication platform

－ In logic, BDS subsystem includes CCM module, CHM module and RFIM module. For the description convenience, CDSU module is described in BDS subsystem.


Baseband Digital Subsystem-Logical Structure

CCM2:1

CHM1

CHM2

CHM12......CHM

3RFIM2:1

CDSU

CDSU

BSC

E1CO

DIS

....

TCM

GPS

I2C

FDM

RFCM6:1

TOD 10M、16CHIP、PP2S

PP2S

16CHIP

10M

CDMA前反向数字基带数据

BDSRS232

RFSCDMA前反向

模拟基带数据

12M

CDMA Baseband Data


Baseband Digital Subsystem

One BDS consists of up to 12 channel processing modules (CHMs), 2 communication control modules (CCM), 2 RF interface modules (RFIMs) and 1 BTS_CDSU module.

One BDS consists of up to 12 channel processing modules (CHMs), 2 communication control modules (CCM), 2 RF interface modules (RFIMs) and 1 BTS_CDSU module.


Baseband Digital Subsystem-Specifications

Support up to 12*16=192 (IS95) ;12*32=384(1x)wireless

Channel modulation/demodulation at the same time(including overhead channel, soft handoff service channel and subscriber service channel)

One BDS can support up to 2 Carrier Frequency with 3 Sectors, Two BDS can support 4 Carrier Frequency with 3 Sectors

Provide the interface with TRX up to SixIt provides 2 or 4 E1 interfaces to be connected with BSC

Support up to 12*16=192 (IS95) ;12*32=384(1x)wireless

Channel modulation/demodulation at the same time(including overhead channel, soft handoff service channel and subscriber service channel)

One BDS can support up to 2 Carrier Frequency with 3 Sectors, Two BDS can support 4 Carrier Frequency with 3 Sectors

Provide the interface with TRX up to SixIt provides 2 or 4 E1 interfaces to be connected with BSC


CCM(Communication Control module)

Provide S_HIRS functions, served as a switching unitSignaling processing and transferMaintenance and Management of modules on BDS SubsystemSoftware downloading and data distributionMaintenance of GPSTM, Receive the TOD message

Main Functions:Centralized control for data signaling route, signaling handling, resource management and maintenance operation of whole BDS subsystem.

Main Functions:Centralized control for data signaling route, signaling handling, resource management and maintenance operation of whole BDS subsystem.



R U N

A L M

R S T

C C M

T E S T

A C T

M / S

RUN Green RUN indicator

ON: asking CPM for an address (the standby machine asks the active one for an address). In case the RUN indicator has been ON, the following cases may occur: 1. No address given. 2. Power supply is input or any fault occurs to a board OFF: no power supply is input, or any fault occurs to a board 3Hz flash: occurring when a board is powered on and showing that BOOT is running.Quick flash (on for 0.3s, off for 0.3s): a board runs normallySlow flash (on for 1.5s, off for 1.5s): a board is loading data. If the RUN indicator has been flashing slowly, it shows that data failed to be synchronizedExtremely quick flash (on for 70ms, off for 70ms): communication with CPM interrupted or communication with the active machine interrupted when used as the standby one

Quick flash (on for 0.3s, off for 0.3s)

ALM Red Alarm indicator.

OFF: no fault ON: any fault occurredQuick flash: showing that GPS still is not in normal working status (including pre-heating)

OFF

ACT Green

Active/standby state indicator.

ON: the board in active statusOFF: the board in standby status ON or OFF

M/S

Master/slave changeover button

When this button on the active board is pressed down, active/standby changeover will take place if the standby board is normal. If the standby board is not inserted or in faulty status, the button becomes invalid.When the button on the standby board is pressed down, this button becomes invalid


CHM（Channel Element Module）

In Forward link: CHM modulates voice or data frames which sent by CCM board via transceiving interface.And then it sends the modulated signals to RFIM board.In Reverse link: CHM receive antenna signals which distributed by RFIM via the baseband data interface, and then it demodulates the signals into voice or data frames and sends them to CCM board for switching processing viatransceiving interfaceCE is in CSM chip, each CHM include 1 or 2 CSM5000 chipset

CHM, located in the BDS frame of ZXC10-BTS, is responsible for modulation/demodulation of the channels in CDMA. It is connected with CCM through the receive/transmit bus and connected with RFIM through the baseband data bus. CHM is made up of CPU unit, modulation/demodulation unit, clock distribution unit and receive/transmit bus control unit. A single frame has 6 CHM modules per carrier.

CHM implements the following functions:

CHM, located in the BDS frame of ZXC10-BTS, is responsible for modulation/demodulation of the channels in CDMA. It is connected with CCM through the receive/transmit bus and connected with RFIM through the baseband data bus. CHM is made up of CPU unit, modulation/demodulation unit, clock distribution unit and receive/transmit bus control unit. A single frame has 6 CHM modules per carrier.

CHM implements the following functions:


CHM（ Channel Element Module ）

16 CSM15 chips in CHM15 for IS95，1 chip include 1 F_CE and 1 R_CE 。

1 to 4 CSM5k chips in CHM5K for 1x, 1 chip include 64 F_CE and 32 R_CE. In 64 F_CE: 36 for voice and the left 28 for data.

16 CSM15 chips in CHM15 for IS95，1 chip include 1 F_CE and 1 R_CE 。

1 to 4 CSM5k chips in CHM5K for 1x, 1 chip include 64 F_CE and 32 R_CE. In 64 F_CE: 36 for voice and the left 28 for data.

X2

X1

X3

X4

X8

S1

X6

1

CSM5K

Or CSM15


RFIM(Radio Frequency Interface Module)

RFIM Functions:

1. RFIM is connected with BDS and RFS. It is controlled by CCM.

2. RFIM transmits and processes forward and reverse baseband

data, TRX control signaling information (configuration control and

status alarm).

3. Clock distribution :It receives 16Chip clock and PP2S from GPS

unit ,and then distributes the clock to channel boards

1. RFIM is connected with BDS and RFS. It is controlled by CCM.

2. RFIM transmits and processes forward and reverse baseband

data, TRX control signaling information (configuration control and

status alarm).

3. Clock distribution :It receives 16Chip clock and PP2S from GPS

unit ,and then distributes the clock to channel boards


RFIM Working Principles

I2 C Bus

CHM0

Reverse link processing (synchronization check)

DISCO Interface function

TRX α

DIS Bus

CO Bus

MCU

CHM5Sector interface unit SIE α

Sector interface unit SIE β

Sector interface unit SIE γ

Forward link processing (sum-up filtering)

Multiplexing/dem

ultiplexinginterface unit

Forward and reverse signaling data processing

TRX β

TRXγ

Signaling transceiving unit

.

.

.


RFIM Front Panel

R U N

A L M

R S T

R F I M

L I N K 1

L I N K 2

L I N K 3

RUN Green Working status indication of this board:

Flash (on for 0.3s, off for 0.3s): MCU is normalON: The board is being started

ALM Red Alarm status indication: ON: 16CHIP clock fault Flash: PP2S clock fault

LINKA Green Sector connection indication

ON shows that A sector is normally connected

LINKB Green Sector connection indication

“ On” shows that B sector is normally connected

LINKC Green Sector connection indication

“ On” shows that C sector is normally connected

RST Reset button When this button is pressed down, a board will be reset


SAM (Site Alarm Module)

Detect the running status of the power module and fansEnvironment signals such as door control, flooding, temperature,

humidity, smoke etc., Reports the detection results to the operation and maintenance

console through the CCM for processing. SAM also provides RS232 and RS485 interfaces for connections

of external monitoring devices

For any large communication equipment, a perfect alarm system is indispensable. It must monitor the working environment of the communication equipment in real time and give a prompt response to any fault and alarm signal for timely processing and avoiding loss.

For any large communication equipment, a perfect alarm system is indispensable. It must monitor the working environment of the communication equipment in real time and give a prompt response to any fault and alarm signal for timely processing and avoiding loss.


BDS Subsystem Summery

RFS

BTS_CDSU 422 CCMCCM

GPSTMGPSTM

TOD

CHMCHM RFIM

codis

BDSTFDMTCM,FDM BTS

BSC

NCMNCM

NIM NIM

disco

7 0 7 0

NCMNCM

NIMNIM

disco

077BSC_CDSU

GPSTMGPSTM,TCM

TOD clkclk Earthnet port

CPMCPMCPS

422

Un E1

PCFIM

PCFPCF

Earthnet port

coPCFS

422dis

SVICM

SVM SVM E1co

SVBS422

dis





FDM（Frequency Distribution Module）

The FDM board implements the following functions:

Receives clock signals from TCM.

Distributes 10MHz signals or distributes them after phase-lock.

Reports the working status of this board through IIC.

The FDM board implements the following functions:

Receives clock signals from TCM.

Distributes 10MHz signals or distributes them after phase-lock.

Reports the working status of this board through IIC.

FDM

Module

I2C10MHz

TRX1TRX2TRX3TRX4TRX5TRX6



BDS (Baseband Digital Subsystem)

TFS (Timing Frequency Subsystem)

RFS (Radio Frequency Subsystem)

PS (Power Subsystem)


RFS Structure

－

RF transceiver

TRX Antenna feeder system

HPARF front

End

RFE

BTS test

BTM

RFS mainly enables air interface via antenna. It supports the interface with BDS via the interface module to implement modulation transmission and demodulation receiving of CDMA signals. It also implements relative check, monitoring, configuration and control functions.

RFS mainly enables air interface via antenna. It supports the interface with BDS via the interface module to implement modulation transmission and demodulation receiving of CDMA signals. It also implements relative check, monitoring, configuration and control functions.


TRX（Transmitter and Receiver Module)

In TRX, two receiving interface, RX1 and RX0, are used for diversity receiving.In TRX, two receiving interface, RX1 and RX0, are used for diversity receiving.


TRX Functions

• 1.Forward link: D/A conversion, filter, intermediate frequency (IF)

QPSK modulation, bandpass filter, transmitting link gain control, signal amplification and up-conversion, etc.• 2.Reverse link: the down-conversion, signal amplification, bandpass filter, AGC, intermediate frequency OQPSK demodulation.• 3.Provides the interface between the RF interface module (digital rack).It transmits and receives baseband data and transfer configuration, control, state and alarm maintenance information;• 4.Generate the internal reference frequency according to the external reference;

• 1.Forward link: D/A conversion, filter, intermediate frequency (IF)

QPSK modulation, bandpass filter, transmitting link gain control, signal amplification and up-conversion, etc.• 2.Reverse link: the down-conversion, signal amplification, bandpass filter, AGC, intermediate frequency OQPSK demodulation.• 3.Provides the interface between the RF interface module (digital rack).It transmits and receives baseband data and transfer configuration, control, state and alarm maintenance information;• 4.Generate the internal reference frequency according to the external reference;


TRX Front Panel

RUN

ALM

TRX

TX

RST

RX1

RX2

RS232

RUN Green RUN indicator.

ON: normal running (B version)Flash: normal running (C version)OFF: power-off or faulty

ALM Red Fault

indicator.

ON: any error occursFlash: IIC fault OFF: normal running or power-off

RST Reset button. used to reset a board.

RST Reset button. When this button is pressed down, a board will be reset

TX Forward transmitting signals sent by TRX

RF IN input end of HPA

SMA RF cable

RX1 Backward receive signals of RFE

RX output end of RFE

SMA RF cable

RX2 Backward receive signals of RFE

RX output end of RFE

SMA RF cable

RS232 Test interface None None RS232 line of DB9


RFCM Functions

Located in the TRX Module

The data interface between the baseband digital subsystem (RFIM) and the RF subsystem (TRX)

D/A-A/D conversion

The monitoring of the various major functional units in the RF subsystem.

Attention：RFCM is inside TRX，can not be seenAttention：RFCM is inside TRX，can not be seen


HPA(High Power Amplifier Module


HPA Functions

HPA performs power amplification for the TRX

forward transmission signals.

When HPA receives the forward transmitted

CDMA signals of TRX , it will amplify the power, so

that the signals will radiate within the cell via the

antenna after they are processed by the duplex filter

of the RF front end with proper signal power to cover

the planned cellular area.

HPA performs power amplification for the TRX

forward transmission signals.

When HPA receives the forward transmitted

CDMA signals of TRX , it will amplify the power, so

that the signals will radiate within the cell via the

antenna after they are processed by the duplex filter

of the RF front end with proper signal power to cover

the planned cellular area.


HPA Performance

PWRON

ALM

HPA

RFON

OFF

RFIN

ON

TEST

RFOUT

Name Color Description Meaning Normal state

PWR ON

Green Power-on indication

ON: a board is normally powered onOFF: No power supply

ON

ALM Red Alarm indication. ON: alarm indication OFF

RFON Green Output power indicator

ON: Running normally ON

RF IN Forward transmitting signal input port from TRX

TX terminal of TRX

SMA RF cable

RF OUT RF signal output port

HPA terminal of the RFE

SMA RF cable

TEST RF signal output test port

None, used for testing

SMA Loaded with SMA

ON/OFF Power switch of power amplifier

None None None


RFE(Radio Front End) Module

DUP: Duplexer (Receive and Transmit)DIV: Diversity (Receiving)

DUP: Duplexer (Receive and Transmit)DIV: Diversity (Receiving)

RFE-DIV RFE-DIV


RFE Module Function

RFE is the bridge between the internal system of RFS in the BTS and the external antenna of the BTS

RFE is the bridge between the internal system of RFS in the BTS and the external antenna of the BTS

Main Functions:

It implements filtering and low noise amplification on small signals received by the antenna

It implements power allocation on received signals after low noise amplification

It provides receiving/transmission duplexing function (only for DUP)

Performs power monitoring, providing related power detection values


RFE-DUPRFE-Duplexer

RFE-DUP

ANT DuplexerFiler

VSWR

TPTL

LNA&Power Splitter

Backplane

From HPA

TO RX

I2C to RFCM

Attention the frequency range of filter!


RFE-DIV

RFE-Diversity

RFE-DIV

ANT Receive Filter

LNA&Power Splitter

To RX

Backplane

I2C to RFCM

Attention the frequency range of filter!


RFE Front Panel

PWRON

LNAALM

RFE-DUP

RX1

RX2

RX3

RX4

ANT

RFLOW

VSWR15

VSWR30

TEST

HPA

Interface Terminal Name

Signal Nature Direction Connector

Connection Mode

TEST RF test signal SMA

ANT Transmitting power signals sent to the antenna and signals received by the antenna

Set top antenna interface port

N-type connector

1/2-inch RF cable (specified temporarily)

HPA HPA-outputted transmitting power signal

TX OUT end of the HPA

SMA RF cable

RX1 One of the 4 power splittingsof the received signals amplified by LNA

RX terminal of TRX of the first carrier

SMA RF cable

RX2 One of the 4 power splittingsof the received signals amplified by LNA

RX terminal of TRX of the second carrier

SMA RF cable


RFE Front Panel (Con.)RX3 One of the 4

power splittingsof the received signals amplified by LNA

Test port SMA 50Ω terminal load addedwhen not used

RX4 One of the 4 powersplittings of the received signals amplified by LNA

Standby SMA 50Ω terminal load added

Indicator Name

ColorMeaning

Description Normal State

PWRGreen

Power indicator ON: power supply available. OFF: power supply unavailable

ON

LNAALM Red LNA current alarm

ON: LNA current abnormal. OFF: LNA current normal

OFF

RFLOW Red Extra low output of RF power

ON: extra low RF power output. OFF: normal output of RF power

OFF

VSWR1.5 RedStanding wave ratio minor alarm

ON: Standing wave ratio minor alarm. OFF: Standing wave ratio normal

OFF

PWRON

LNAALM

RFE-DUP

RX1

RX2

RX3

RX4

ANT

RFLOW

VSWR15

VSWR30

TEST

HPA





Power Subsystem Self

PSMD: Power Distribute Module

PSMD is located in BTS system power distribution box. It distributes the input

-48V DC power into shelves. PSMD board checks and controls the working states

of power system and fan.

PSMC: ±12V:Provide Power for REF&TRX&FDM

PSMB: +5V:Provide Power for BDS

PPM: +27V:Provide Power for HPA

PSMD: Power Distribute Module

PSMD is located in BTS system power distribution box. It distributes the input

-48V DC power into shelves. PSMD board checks and controls the working states

of power system and fan.

PSMC: ±12V:Provide Power for REF&TRX&FDM

PSMB: +5V:Provide Power for BDS

PPM: +27V:Provide Power for HPA


Power Supply Structure

PSMD

PPM

PPM

PPM

PPM

PPM

PSMC

PSMC

P SMB

PSMB

BDS

-48V IN

-48V OUT

+5V +5V

HPA X6

+27V

TRX X6

RFE X6

FDM

-12V+12V


Main Content

BTS Overview




S111-- 1 Carrier 3 Sectors

RFE(Alpha)

TRX

RFCM

BDS机框

HPA

TRX

RFCM

HPA

TRX

RFCM

HPA

T

X

T

X

T

X

RFE(Beta)

RFE(Gamma)

R

X

0

R

X

1

R

X

0

R

X

1

R

X

0

R

X

1


RFE

(ALPHA)

TRX

RFCM

BDS机框

HPA HPA

TRX

RFCM

RFE

(BETA)

RFCM RFCM

RFE

(GAMMA)

RFCM RFCM

T

X

T

X

RFE

(ALPHA)

RFE

(BETA)

RFE

(GAMMA)

R

X

1

R

X

0

R

X

1

R

X

0

TRX

HPA HPA

TRX

T

X

T

X

R

X

1

R

X

0

R

X

1

R

X

0

TRX

HPA HPA

TRX

T

X

T

X

R

X

1

R

X

0

R

X

1

R

X

0

S222– 2 Carrier 3 Sectors


BSS Network Connection

BSC

BTS0

BTS1

BTS2

BTS3

Star Network

• In star network connection, each BTS is connected to BSC independently. Maintenance and engineering are all easy and conveniently.

• Popular in city and dense area.

• In star network connection, each BTS is connected to BSC independently. Maintenance and engineering are all easy and conveniently.

• Popular in city and dense area.


Chain Network

BSC BTS0 BTS1 BTS2


• In chain connection, several BTS will share one E1, reliability is not very good.

• Popular in rural and low traffic area, this

Can save a lot of transmission resource.

• In chain connection, several BTS will share one E1, reliability is not very good.

• Popular in rural and low traffic area, this

Can save a lot of transmission resource.


Star and chain combined network

BSC

BTS0 BTS1 BTS2

BTS3

BTS4


• In practice, the transmission between BSC and BTS is very flexible.The most popular is SDH, but also we use micro-wave;coaxial cable;HDSL,even satellite.

• In practice, the transmission between BSC and BTS is very flexible.The most popular is SDH, but also we use micro-wave;coaxial cable;HDSL,even satellite.


Date post:	21-Apr-2015
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53413228 020ZXC10 BSS Hardware System Module V2 0

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