BTS 8018 Hardware Presentation

Hardware Structure of ZXG10-B8018

GSM-BSS Team

Contents

1. General Introduction

3. New features

2. Structure Introduction

4. Configuration Instruction

5. End

1.General Introduction

Specification explanation

What does B8018 mean?

Z X G 1 0 B 8 0 1 8

ra n g e o f m o d e ls

B :m a c ro b a s e s ta tio nM :m ic ro b a s e s ta tio n

h a rd w a re p la tfo rm8 :d u a l c a rrie rs

0 : in d o o r, 1 : o u td o o r

n u m b e r o f c a rrie rs


ZXG10 B8018 is new type of ZXG10-BTS, based on ZXG10-BTS

(V2)

employs many new technologies and achieves great improvement

in software, hardware and system reliability.

It not only has inherited all advantages of ZXG10-BTS (V2), but

also has added many new functions and services to satisfy market

requirements. In addition, it also reduces hardware and networking

cost.

It is one of the most perfect serial BS and solve the problem that

cannot be solved by current ZXG10-BTS (V2).


Employs DTRU technology, i.e. two carriers in each physical transceiver module;

Supports parallel connection with ZXG10-BTS (V2) cabinet to realize capacity expansion;

Supports DPCT, downlink delay diversity (DDT) transmission, IRC and so on;

Supports 4 diversities reception; Supports 8 E1/T1 interface; Supports 75Ω/E1 and 120Ω/E1 transmission; Supports intelligent power on/off; Supports IP Abis-interface.

The main functions of ZXG10 B8018 are shown below:

BSC

O

M

U

B

P

U

R

F

U

A

P

U

P D U

Abis Interface

Data Link

System

Clock

System

Clock

Control

signal

Demodulated

Signal

Modulated

Signal

RR

Signal

Um Interface

BTS HARDWARE PRINCIPLE

Rack Layout of B8018


1600mm×600mm×550mm (H×W×D)

Cabinet size

System Indices

Frequency Range GSM900, EGSM900, 850, 1800, 1900MHz band

Power Amplifier Output: For GMSK=60W

For 8PSK= 40W

Static Receiving Sensitivity -112dBm

Voltage -48V DC

Allowed Change Range -40 ~ -57

Maximum Power Consumption 3750 W

Working Temperature -15 ~ 45 C

Relative Humidity 5% ~ 90%

Grounding Resistance <5 ohm

Capacity Single rack=18 TRX/Rack

Largest Site Type S18/18/18 or O54

S6/6/6 S12/12/12 S18/18/18

BTS hardware Configuration Expansion

Single Cabinet with Full Configuration


Rear Board

Grounding Screw

Cabinet Top

Top-Layer Shelf

Fan Plug-in Box

Carrier Shelf

Side Baffle

Front Door

Horizontal Cabling Rack

Cabinet Main Body

Base

Air Filter Plug-in Box

Cabinet Structure

Cabinet Top Layout



Interfaces on the Cabinet Top

Ventilation scheme



DIP Switch


BTS Type

1100 : B8018

1101 : B8112

1110 : M8202

1111 : M8204

BTS_NO : Cabinet number in the same site

00 : Basic Cabinet

01 : Extended Cabinet 1

10 : Extended Cabinet 2

SLAVE1_PORT : The E1 port of the basic cabinet to connect extended

cabinet 1

00 : Port E of the basic cabinet

01 : Port F of the basic cabinet

10 : Port G of the basic cabinet

11 : Port H of the basic cabinet


SLAVE2_PORT : The E1 port of the basic cabinet to connect extended

cabinet 2

00 : Port E of the basic cabinet

01 : Port F of the basic cabinet

10 : Port G of the basic cabinet

11 : Port H of the basic cabinet

SATE : Whether to use the satellite Abis link or not

0 : Common Abis

1 : Satellite Abis

ABIS_PORT : O&M port number

00 : Port A

01 : Port B

10 : Port C

11 : Port D


ABIS_TS : The O&M Lapd timeslot on Abis interface

000 : TS16

001 : TS31

010 : TS30

011 : TS29

100 : TS28

101 : TS27

110 : TS26

111 : TS25

Hardware Structure of ZXG10 B8018


控制框

ABIS接口（8路E1/T1或1路100M以太网）

CMB

（TDM交换）

电源输入

同步时钟输入输出

DIDB

EIB/FIB

站点ID

8路E1/T1

8M HW（仅FIB板适用）

监控接口LMT串口、网口

电源和接口控制

FCLK和13MHz测试时钟

PDM-48V

收发信框3

DTRU0 DTRU1 DTRU2AEM0 AEM1 AEM2

AEM电源（+12V/-12V）

AEM0告警

AEM2告警

AEM1告警

DFCM3风机3

DFCM工作电源和告警采集

收发信框2



AEM0告警

AEM2告警

AEM1告警

DFCM2风机2


收发信框1



AEM0告警

AEM2告警

AEM1告警

DFCM1风机1


8M HW、时钟及智能下电等控制信号



天馈

天馈

天馈

Power I nput

ControlFrame Si te I D

ABI S I nterf ace(8t r i butar i es E1/ T1

or one 100MEthernet ) Onl y appl i ed on FI B

8 E1/ T1

Power and i nter f ace cont rol

(TDM Swi tchi ng)

8M HW, cl ockand

i ntel l egentpower ON/ OFF

8M HW, cl ockand


8M HW, cl ockand


Synchorni zat i on cl ocki nput/ output

Moni tor i nterface

LMT seri al i nterface, network i nterface

FCLK and 13 MHz test cl ock

Fan 3

DFCM worki ng powerand al arm col l ect i on

Transcei verf rame 3

AntennaFeeder

AntennaFeeder


Fan 2


AntennaFeeder


Fan 1


AEM power(+12V/ - 12V)

AEM0 al arm



AEM1 al arm

AEM2 al arm

AEM0 al arm

AEM0 al arm

AEM1 al arm

AEM1 al arm

AEM2 al arm

AEM2 al arm

Hardware Structure of ZXG10 B8018


Time Slot Switching in B8018 System


CMB

E1/T1Frame

r&LI U

FI B

8*2MHW

4*2MHW

8*E1/T1

100M ETH

MT90826

速率变换8MHW

EI B 8*E1/ T1

CPU

QMC

2MHW

速率变换

速率变换

速率变换

4*2MHW

4*2MHW

4*2MHW

8MHW

8MHW

8MHW

dTRU(#0-2)

LAYER 1LAYER 2

LAYER 3

2MHW

dTRU(#3-5)

dTRU(#6-8)

环境监控透明通道

2MHW

Envi ronmentmoni stor

t ransparentpassage

Rateconversi

on

Rateconversi

on

Rateconversi

on

Rateconversi

on

Clock Distribution in B8018 System


CSBCMB

DTRU(#0-#2) DTRU(#3-#5) DTRU(#6-#8)

60ms

13M/60ms/8K_8MW/8M

LAYER 1 LAYER 2 LAYER 3

2M BITS

Intelligent Power ON/OFF Circuit


244

PWR_DWN

CMB

-48V

-48VGND

-48V150K

51.1K

10

10U

2.55K

被控单板Cont rol ed board

Ground system of B8018


GP-ground pointCP-connection pointCB-collection barGNDP-protection groundGND-power groundGNDA-analog GNDGNDD-digital GND

General hardware structure of ZXG10 B8018

2.Structure Introduction

环境监控

电源输入

CMB

PDM

FCM

DTRU0

.

.

.

AEM

Um接口

内部通讯接口 (包括控制信令、数据流、时钟信号等）

ZXG10 B8012

BSCAbis接口

MMI

DTRU1

DTRU8

EIB/FIB

Envi ronmentmoni tor

Poweri nput

Abi si nterface Um i nterface

I nternal communi cat i on i nterf ace ( i ncl udi ng cont rolsi gnal i ng, data f ol w, cl ock si gnal and so on)

X6 X7 X8X6X5

X16 X18X17

X6 X3 X4X2X1

X40 X41X39

X15 X12

I D电源接入

CMB 电源

CMB 电源

LAY1 LAY2 LAY3

X11

X13

E1

X14

干节点

FI B/ EI B

CMB1

CMB0

级连同步时钟

X10

ETH

X42

E1

FI B 电源

X43

LAY1～3

X44

接地

FI B power

CMB power

CMB power

Power i nput Ground Trunk nodeCascaded

synchroni zat i oncl ock

BBCM Backplane Sub-system of ZXG10 B8018


BBCM - Control & Maintenance Backplane Board

Position of BBTR Backplane in ZXG10 B8018


BBTR - Transceiver Backplane Board

BSC

DTRU

AEM

DTRU

DTRU

Abis接口

BBCM背板 BBTR背板

CMBEIB/FIB

Abi si nterf ace

backpl ane backpl ane

DFCM hardware sub-system of ZXG10 B8018


DFCM - Dual Fan Control Module

CPU

光耦隔离

监视电路

光耦隔离

风机驱动

电源1 电源2

PWM 风机控制

温度1温度2

风机1转速

风机2转速

PDM来TRM来

温度告警

FAM1告警

FAN2告警

CPU告警

+12V -48V&+24V

+5V串口

温度传感器

Temperatureal arm

FAM1 al arm

FAN2 al arm

CPU al arm

Light coupledisolation

Light coupledisolation

Fan driver

Moni torci rcui t

Power 1

Seri ali nterf ace

Temperaturesensor

Fancont rol

Power 2

Fan 1 spi nrate

Fan 2 spi nrate

From TRM FromPDM

Temperature1

Temperature2

CMB hardware sub-system of ZXG10 B8018


线路接口

交换单元

BS接口

时钟单元主备接口单元

环境监控单元

MMI接口单元

主控制器单元

MPC860电源单元

CLK_REFCLK

Abis TO_DTRU

载频单元开关电

cl ockuni t

poweruni t envi ronment

moni tor uni t

act i ve/standby

i nterf aceuni t

MMIi nterface

uni t

power OFF/ ONof carri erf requency

uni t

mai n contorldevi ce uni t

lineinterface

switchingunit

BSinterface

EIB hardware sub-system of ZXG10 B8018


匹配电路

变压器

保护器件

跨接继电器

背

板

EI B

8 E1/T1

backplane

matchingcircuit

Transformer

protectiondivice

bridgeconnection relay

FIB hardware sub-system of ZXG10 B8018


百兆以太网

背

板

ETHMAC

MPC8270

电源

时钟匹配电路

变压器

保护器件

跨接继电器

4 E1/T1

IP拨码

8MHW

matching circuit

Transformer

protection divice

bridge connection relay

Clock

power

IP Dial Conf

backplane

100M-Ethernet

DTRU hardware sub-system of ZXG10 B8018


dTPB

+28V工作电源+28V工作电源

dPSB

dTRU

TX0

检测信号TX0_OUT

dPAB0

TX1_OUT

TX1检测信号 dPAB1

前面板

背板

合路器

TCX_in0

TCX_in1

TCX_out

RX00

RX01RX10

RX11

-48V电源

-48V电源+12V、-12V、+8V以及电源告警

dRCB

CIP

调测口及指示灯

AEM电源/DFCM电源

AEM告警/DFCM电源

HW

-48V power

AEM power/DFCM power

AEM al arm/DFCM power

-48V powerCOMBINER

+28V worki ng power

+28V worki ng power

+12V, -12V, +8V andpower al arm

detect i onsi gnal

detect i on si gnal

detect i onsi gnal

commi ssi oni ngtest i nterf aceand i ndi cator

backpl ane

frontpanel

DTRM Front panel


Compared with BTS(V2.9), there are

Another ACT indicator, ACT1 and ACT2

Indicate the channel status of 2 TRX

Separately.

PWR

RUN

M O D

STA

ACT1

ACT2

D T R M G

Baseband hardware sub-system of ZXG10 B8018


MPC 860

FPGA

dTPB

CMBHW

Control

TIDSP C6416

LMT

2-way IQ dataTrans & Rec

HPI Message

MCBSP

HW TRAU/PCU

Frame

HDLC/LAPD/Test

LINK Control


Antenna Equipment Module

TRM GROUP AEM

Tx

Rx

Rx

D


Antenna Equipment Module Types

2.Structure introduction



Difference between CEUs and CENUs


Introduction of CDU (1)

VSWR_meter

ANT

RTE

forward reverse

Alarms

optional

DuplexerCable

Cable

Rx_in

Tx_out

RX1

RX2

RX3RX4

ERX1

ERX2LNA_Splitter

Alarms

TX1

TX250ohm

Hybird_combiner


Introduction of CDU (2)

1 to 4 Divider

2 to 1 Combiner

DUPLEXER

Ext Receive

RX1

CDU

TEST

ANT

TX1

TX2

RX2

RX3

RX4

EX1

EX2

Combiner Input

Indicator

Divider Output

Divider Ext Output

Antenna

Test Port


Introduction of ECDU

VSWR_meter

ANT

RTEforward reverse

Alarms

optional

Duplexer Cable

Cable

Rx_in RX1

RX2

LNA_Splitter

Alarms

ITX

Rx_filterANTD Cable Rx_inLNA_Splitter

Alarms

RXD1

RXD2


Introduction of DCDU

VSWR_meter

ANT

RTE

forward reverse

Alarms

optional

DuplexerCable

Cable

Rx_in

RX1

RX2

LNA_Splitter

Alarms

ITX


Introduction of RDU

RTE

Rx_filter

50ohm

ANT Cable Rx_in RX1

RX2

RX3

RX4

ERX1

ERX2LNA_Splitter

Alarms


Introduction of CEU (1)

To CDU TX1

RX1

RX2

RX3

RX4

ERX1

ERX2

Rx_Splitter

TX1

TX250ohm

Hybird_combiner

To CDU TX2 TX3

TX450ohm

Hybird_combiner


Introduction of CEU (2)

1 to 2 Divider

2 to 1 Combiner

1 to 2 Divider

2 to 1 Combiner

RX1

CEUTX1

TX2

RX2

RX3

RX4

EX1

EX2

OTX1

TX3

TX4

OTX2

Indicator

Divider Output

Divider Ext Output

Combiner Input

Combiner Output


Introduction of CENU


Introduction of CENU/2

Power sub-system of ZXG10 B8018


控制接口板

off o

第一层背板电源端口

控制CMB背板控制第三层背板

控制第二层背板控制第一层背板

off o

说明：1 -48，经开关后，分别接到背板的相应端口；2 -48，直接接到背板的相应端口；3，直接接到背板的相应端口。上图已经画出一层背板的连接情况，其他各层类似。

- 48VGND

- 48V

CMB

dTRM

机顶

PDM

off o

off o

off o

off o

off o

off o

off o

off o

off o

off o

机顶滤波器

机顶开关

接线柱

PE

- 48VGND

- 48V

off o

I nt roduct i on:1. - 48V are connected to the correspondi ng i nterf ace of backpl ane af ter PDMswi tch.2. - 48VGND i s connected to correspondi ng i nterf ace of backpl ane di rect l y3. PE i s connectd to correspondi ng i nterf ace of backpl aneThe fi gure above gi ves the connnect i on of one l ayer backpl ane, the otherl ayers are si mi l ar to thi s.

cont rol fi rstl ayer backpl ane

cont rol secondl ayer backpl ane

cont rol thi rdl ayer backpl ane

cont roli nterf ace board

cont rolCMB

backpl ane

power i nterf ace of fi rstl ayer backpl ane

cabi net top

cabi nettop

fi l ter

cabi nettop

swi tch

connectorpost

PDM of ZXG10 B8018


1.D备注： 15选用 300断路器： /32 150% 2. 1选用断路器 3. 1选用断路器

示意图di agrame

Remark:1. Choose 15A ci rcui t breaker forDTRU: 300W/ 32V*150%2. Choose 1A ci rcui t breaker for CMB3. Choose 1A ci rcui t breaker for FI B

3.New features

DTRU technology;

DPCT-dual power combining Transmission;

DDT-delay diversity transmission

4-way diversity reception;

IRC-Interference Rejection Combining;

intelligent power on/off;

TFO-Tandem free operation

IP Abis-interface.

The main features of ZXG10 B8018 is shown below:

3.New features - dTRU

The dTRU is very flexible and can be used for several purposes.

Its two TRXs, for instance, can be used separately or, by DPCT

to improve the downlink and four-way diversity to improve the

uplink, they can be configured to create a super TRX.

3.New features - dTRU

One dTRU can easily be used to extend coverage

3.New features - DPCT

When seeking greater cell range it is crucial to have a strong signal from the BTS to the handset.

This is often referred to as downlink capability. This is what a handset presents as signal

strength in the display. In configurations intended for maximum coverage, Dual Power

Combining Transmission (DPCT) feature doubles the output power from the BTS cabinet,

resulting in a significantly larger coverage area.


DPCT principle


DPCT implementation in B8018

Transmitter 1 P A 1

2 P A 2

power feedback

Transmitter

Co mb in e r

3.New features – DDT

Purpose: supports downlink transmitter diversity (the mobile phone combines the best of two signals).

Implementation: by transmitting the same information on two TRXs with a short delay and different antennas.

using only a simple software command, operators can convert the base station from a two transceiver operational mode into the “DDT" mode, where the two transceivers work together as one virtual transceiver, so extending the range.

cellular downlink performance is increased by at least 3.0 decibels (dB) at the cell border, reducing the number of sites needed by up to 30 percent over any conventional base station coverage network.

― Delay Diversity Transmission

3.New features - DDT

DDT implementation in B8018

C M B

d T P B

m ain divTX

br an c hdiv.TX

6 .5 Mc a r r i e r

s ym bolde lay

I Qdat a

D Lbur stda t a

D A C

D A C

Con

trol

&b

aseb

and

pro

cess

base

band

mod

ulat

ion

Abi

s In

terf

ace

boar

d

Dig

ital

up

con

vers

ion

br an c h div.data

m ain div.data

6 .5 Mc a r r i e r

― Delay Diversity Transmission

3.New features – 4 div RX

The majority of radio networks today have limited range due to

weak uplink signals from handsets. The best way to overcome an

unbalanced link budget is to ensure good receiver capability in

the base station. With the addition of a second antenna system in

the cell, we enable 4-Way Receiver Diversity (4WRD), and this

provides a total uplink that compensates for weak handset

signals.

The combination of DPCT with fully compensated uplink based

on 4-way Receiver Diversity comprises our Supreme Coverage

solution.

― 4 diversities reception

3.New features - IRC

Another way to increase the capacity, more advanced detection techniques have been implemented - Interference Rejection Combining (IRC)

In maximum ratio combining (MRC) each signal is weighted with its signal-to-noise ratio to achieve optimum performance in white noise environments, i.e. the noise signal is uncorrelated in time.

IRC, on the other hand, takes the correlation properties of CO-channel interferers into account to suppress them, and therefore is able to achieve much better performance in co-channel limited environments than MRC.

― Interference Rejection Combining

3.New features – Int. Pwr on/off

In order to reduce OPEX of operator, when traffic decrease

to certain value or in idle mode, this scheme automatically

to turn off part of Modules of B8018 to save power.

When traffic increase to certain busy threshold, this scheme

automatically to turn on sleep module to balance the traffic.

The principle is as follows: CMB is able to control the switch

of all board (mainly is DTRU) in rack except interface board

(EIB/FIB) and CMB.

― Intelligent power on/off

3.New features – TFO

In a normal MS-MS call configuration the Speech Signal is first encoded in the

originating MS, sent over the Air Interface, converted to A-law or μ-law in the local

transcoder, carried over the fixed network, transcoded again in the distant

transcoder, sent over the distant Air Interface and finally decoded in the terminating

MS. In this configuration, the two speech codecs (coder/decoder pairs) are in

"Tandem Operation". The key inconvenience of a tandem configuration is the

speech quality degradation introduced by the double transcoding. This degradation

is usually more noticeable when the speech codecs are operating at low rates.

When the originating and terminating connections are using the same speech

codec, it is possible to transmit transparently the speech frames received from the

originating MS to the terminating MS without activating the transcoding functions in

the originating and terminating networks. In this configuration, "Tandem Free

Operation" is on-going.

3.New features - TFO

MS/UEMS/UE

PLMN A PLMN BTranscoding

Function

Encoding Decoding DecodingEncodingCompressed Speech Compressed SpeechITU-T G.711 A-Law/-Law

Transcoding Functions

TranscodingFunction

Tandem Free Operation of Speech Codec

TranscodingFunction

TranscodingFunction

Transcoding Functions Bypassed

MS/UEMS/UE

PLMN A PLMN B

Encoding DecodingCompressed Speech

Figure 2 Typical Speech Codec Tandem Operation

3.New features – IP Abis

One of the primary advantages of employing IP-based transport is

the ease of maintenance arising from convergence of core and

RAN networks.

Other advantages include economic benefits and capacity benefits

3.New features – IP Abis

IP Abis Architecture

4.Configuration Instruction

O4 Configuration


O6 Configuration


O8 Configuration


S8/8/8 Configuration


DPCT with O2 (S2) with 4 Diversity


GSM900 + GSM1800 S2 + S2 Configuration


Configuration


S2/2/2 hybrid Configuration

Networking Modes

Tree Networking Mode

Networking Modes

Star Networking Mode

Networking Modes

Chain Networking Mode

Networking Modes

Tree Networking Mode

BTS 8018 Hardware Presentation

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