ORI001102 CDMA WLL BTS3612 Hardware System ISSUE3.0

Wireless Curriculum Development SectionWireless Curriculum Development SectionWireless Curriculum Development SectionWireless Curriculum Development Section

ISSUEISSUE

ORI001102 CDMA WLL ORI001102 CDMA WLL BTS3612 Hardware SystemBTS3612 Hardware System

ORI001102 CDMA WLL ORI001102 CDMA WLL BTS3612 Hardware SystemBTS3612 Hardware System

3.03.0

Confidential Information of Huawei. No Spreading without Permission. Security Level: Internal

ObjectivesObjectives

BTS3612 system, principle and structure.

Function of all BTS3612 boards.

Antenna & Feeder system

Networking configuration

At the end of this presentation, you will be familiar with:


We will discuss…..We will discuss…..

Chapter 1: System Overview

Chapter 2: Baseband Subsystem

Chapter 3: RF Subsystem

Chapter 4: Power Supply Subsystem

Chapter 5: Antenna and Feeder Subsystem

Chapter 6: Networking


A Wireless NetworkA Wireless Network

LE

MIP HA

AAA

PDSN/FA

Abis

BTS

A10/A11

Um

V5

LEV5Optical

FiberSoftsite

Um

Remote Model

AbisE1/STM-1

Module

RAC6610

BTS

BTS

SMC

Abis

FWT

INTERNET


BC IM

BC IM

BCPM

BCPM

BCPM

BCPM

BCPM

BCPM

BRDM

BRDM

BCKM

BCKM

BRDM

BRDM

BCPM

BCPM

BCPM

BCPM

BCPM

BCPM

BRDM

BRDM

Fan box 1 Fan box 2

Power distribution room

PSU

BHPA

BTRM

RLDU

CDU

PSU

PSU

PSU

PSU

RLDU RLDU

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

CDU/DFU CDU/DFUCDU CDU/DFU CDU

BTS3612 Cabinet & Functional Distribution BTS3612 Cabinet & Functional Distribution

RF subrack

CDU/RLDU subrack

Fan subrack

Baseband subrack

RF subrack

Power subrack


Abis signaling

TCP/IP

IPOA

AAL5

ATM

OML signaling

TCP/IP

IPOA

AAL5

ATM

Abis traffic

AAL2

ATM

Abis signaling OML signalingAbis traffic

IS-2000.2

Um

Command line

TELNET

802.3

MMI command

Interface Protocol StackInterface Protocol Stack


Let us discuss now…..Let us discuss now…..








A Fully Loaded Base band SubrackA Fully Loaded Base band Subrack

0

BC IM

1

BC IM

2

BCPM

3

BCPM

4

BCPM

5

BCPM

6

BCPM

7

BCPM

8

BRDM

BRDM

BCKM

BCKM

BRDM

BRDM

BCPM

BCPM

BCPM

BCPM

BCPM

BCPM

BRDM

BRDM

10 11 12 13 14 15 16 17 18 19 20 219

0 1 0 1 2 3 4 5 0 1 0 1 8 9 10 11 12 132 3 4 5


Baseband Functional DiagramBaseband Functional Diagram

High speed data bus

BCIMBSC

BRDM

BCKM

BCPM BTRM

Other functional unit of the system

E1

Optical Fiber

Clock bus

Backplane bus

Emergency serial port...

Baseband Subrack


BCKM is categorized in to two main parts, i.e. BCKM is categorized in to two main parts, i.e.

1. Main Processing Unit (MPU)

Signaling Processing Sub-module (SIG)

Operation and Maintenance Sub-module (OMU)

2. Clock Module (CLK)

BCKMBCKMBaseband Subrack


MPUMPU

OMU sub-module accomplishes:

SIG sub-module:

Signaling processing

BCKMBCKM

Resource management Equipment management Performance monitoring Configuration management

Software downloading Active/standby switchover Board controlling

Baseband Subrack


BCKMBCKM

CLK provides the clock to the BTS with following features

Adopts the GPS/GLONASS as an external clock resource

to provide 1PPS (one pulse/second) and GPS.

Produces PP2S signal.

Provides 10MHz local secondary (divided according to the

precision) clock signals.

CLKCLK

Baseband Subrack


Notice:Notice:

BCKMBCKM

When GPS, GLONASS or external synchronous

1PPS Signals are activated, the clock is in the

normal running mode.

When GPS, GLONASS or external synchronous

1PPS fails, the local clock is in the holdover mode.

Under this state the system can run normally for

more than 8 hours.

Baseband Subrack


Active/Standby RunningActive/Standby Running

BCKMBCKM

When fault occurs in the active BCKM, then the

services will switch over to the standby BCKM under the

control of the related software or automatically. In

following three cases this switching is occurred: A. Abnormality in CLK leads to BCKM switchover.

B. Abnormality in MPU leads to BCKM switchover.

C. The hardware failure and damage of important devices of

the board lead to BCKM switchover.

Baseband Subrack


BCKM Structure

BCKMBCKMBaseband Subrack

Power supply module

External

communication

unit

Clock module

Backplane bus processing

module

Other

functional units

MPU

BCKM

CBKM

...

Backplane bus


BCKM FacetBCKM Facet

BCKMBCKM

GPS/GLONASS antenna port

ETH (Ethernet interface). A

user can login BTS3612 for

operation and maintenance

by telnet.

Normal status:Status (RUN) Indicator: flashes slowlyAlarm (ALM) indicator: OFFOperation (ACT) indicator: ON

Baseband Subrack


BCPMBCPM

BCPM is the service processing board. It processes

various service data of forward and reverse channels

including coding and decoding of baseband signals and

primary modulation and demodulation of the baseband.

It also processes the high-layer control signals.

12 boards can be plug in at the most.

Baseband Subrack


Functional DiagramFunctional Diagram

BCPMBCPMBaseband Subrack

CLK

Backplane busprocessing

module

MPU

CSM

CSM

CSM

High-speed serial port

BRDM


Daisy ChainDaisy Chain

BCPMBCPM

The daisy chain is equivalent to the resource pool, w

hich is divided into intra-board daisy chain and inter-

board daisy chain. The essential of any mode is that

the CSMs (baseband processing chips) form a resou

rce pool.

Baseband Subrack


BCPMBCPMBaseband Subrack


BCPM FacetBCPM Facet


BRDMBRDM

The Resource Distribution Board (BRDM) is logically

located between Transceiver Module (BTRM) and

Channel Processing Module (BCPM). It provides the

I&Q modulation. BRDM also supports the daisy

chain within the cascaded channel processing

boards.

Baseband Subrack


Optical module

High speed data interface

module

Switching module

CPU module

Bus interface module

4 high speed data buses

Power module

Fiber

Fiber

Fiber

Fiber

Fiber

Fiber

CLK

Optical module

Optical module

Optical module

Optical module

Optical module


module


module


module


module


module

RS232



BTRMBCPM


Backplane bus

BCKM

BCPM

BCPM

BCPM

BTRM

BTRM

BTRM

BTRM

BTRM

BRDM


BRDMBRDMBaseband Subrack


BRDM FacetBRDM Facet

BRDMBRDM

Six optical interfaces, for BTRM connection


Baseband Subrack


BCIMBCIM

In reverse direction, BCIM receives O&M command from BCKM and traffic data from BCPM, and transmit ATM cells on the multiple E1 links via IMA.

In forward direction, it receives ATM cells, which are distributed on the multiple E1 links from BSC, multiplexes them into a single ATM cell flow with IMA techniques and finally sends them to the corresponding processing boards over the backplane bus.

Each BCIM provides 8 E1 links, which can support at most 4 IMA link sets.

Baseband Subrack


IMA ModuleIMA Module

IMA

E1 Interface

E1 Interface

E1 Interface

E1 Interface

E1

E1

E1

IMA

E1 Interface

E1 Interface

E1 Interface

E1 Interface

ATMCell FLOW…

...

11

1

42

2

5 33

3 15 1

4

4Specific

bandwidth

1 1 1 1

4

223 3 3

1 1

4

Specificbandwidth

E1 LinkE1 linkE1 linkE1 link

E1 in fixed time slot mode

IMA （ Inverse Multiplexing on

ATM）

4 4

4

16

6

6

77

77

BCIMBCIMBaseband Subrack


Backplane bus module

CPU module

Control bus

Data bus

E1

RS232

Backplane bus

BCKM

BESPIMA module

...

Power moduleCLK


Note: BESP is E1 lightning protection board.

BCIMBCIMBaseband Subrack



BESPBESP

BESP is a functional entity for BTS3612 to implement lightning protection within E1 trunk cable.

Baseband Subrack

8 E1s

4 E1s

4 E1s

Inte

rface

DB

37

BSCInterfaceDB25

Inte

rfac

eD

B2

5

BESP

BSC

BCIM

...

...

Level-1 Level-2

protection

PGND

Level-1 protection

Level-2 protection

PGND

Level-1 Level-2

protection

PGND


BCIMBCIM


BCIM facetBCIM facet

Baseband Subrack


BBFMBBFM

BHPA

BTRM

RLDU

CDU/DFU

RLDU RLDU

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

BHPA

BTRM

CDU/DFU

CDU/DFU

CDU/DFU

CDU/DFU

CDU/DFU

BBFM

RF Subsystem


BTRMBTRM

BTRM accomplishes modulation/demodulation

of baseband signals, analog/digital and digital/a

nalog (AD/DA) conversion, digital up/down conv

ersion and radio up/down conversion.

RF Subsystem


BTRMBTRM

BTRM Facet BTRM Facet Baseband data are transmitted or received via this in

terface

Baseband data are transmitted or received via thi

s interface

RF Subsystem


BHPABHPA

BHPA is used to amplify the RF

modulated signals received from

BTRM.

RF Subsystem


CDUCDU

Combines two carrier signals into one, these two signals ar

e received from the two BHPAs.

Provides isolation and filtering for the received and transmit

ted signals.

Filters the transmitted signals in order to suppress BTS spu

rious emissions.

Filters the received signals in order to suppress the out-ba

nd interference.

RF Subsystem


CDU Structure DiagramCDU Structure Diagram

CDUCDU

Interfaces on the CDU Panel

Interfaces to the backplane, which

have been connected with

inner cables

Connected to feeders

RF Subsystem

Pr-OUT

Pf-OUT

TX1

TX2

RXM-OUT

RXD-OUT Diversity

Combiner

Duplexer

Directionalcoupler

RXD-ANT

RXD-Test

RXM-Test

TX-Test

TX/RXM-ANT

Isolator

Isolator


DFUDFU

Provides isolation and low-pass filtering to two received

and transmitted signals.

Provides two DC feeds to T-type tower-top amplifier.

Supports Voltage Standing Wave Ratio (VSWR) test on

transmit channels in both forward and backward directions.

Supports coupling test of transmitted and received signals.

RF Subsystem



DDUDDU


ND-SUB SD N-Type SMA-Type

LPF

DUPLEXER

COUPLERN

S

S

D

D

D

D

TX2-TESTTX/RXD-ANT

RXD-TEST

Pf2-OUT

Pr2-OUT

TX2

RXD-OUT

LPF

LPF

DUPLEXER

COUPLERN

S

S

D

D

D

D

TX1-TEST

TX/RXM-ANT

RXM-TEST

Pf1-OUT

Pr1-OUT

TX1

RXM-OUT

LPF

BIAS T

BIAS T

BIAS T

BIAS T

RF Subsystem


DFUDFU

Provides isolation and filtering of transmitted and received

signals to the single carrier.

Filters the received signals in order to suppress the out-

band interference.

RF Subsystem



DFUDFU

Interfaces on the DFU Panel

Interfaces to the backplane, for

inner connections


RF Subsystem

N

D-SUB SD

N-Type

SMA-Type

N

S

S

D

D

D

D

TX-TEST

TX/RXM-ANT

RXM-TEST

Pf-OUT

Pr-OUT

TX

RXM-OUT

Low-pass filter

DRXD-OUT N RXD-ANT

S RXD-TEST

Diversity receive filter

Low-pass filter Duplexer

Directional coupler


RLDURLDU

Provides low noise amplification and distributes the received

signals.

Offers built-in electronic RF switch supports multiple BTS

configurations (3 sectors or 1 sector).

Monitors the antenna VSWR.

Detects the BTS forward RF power and monitors the LNA

running status.

RF Subsystem



RLDURLDURF Subsystem

VSWR check processing

VSWR and powercheck

LNA Distribution module

DC-INPWRS/WDB15

RXAM-TEST

RXBM-TEST

RXBD-INRXBM-INRXAD-INRXAM-INAPf-INAPr-INBPf-INBPr-IN

RXAM1RXAM2

RXAD1RXAD2

RXAM3/RXBM1RXAM4/RXBM2

RXAD3/RXBD1RXAD4/RXBD2

Power supply

Forward power output


RLDURLDU

RLDU Facet

S/W is switched to 0: The corresponding BTRM number>2 and <=4S/W is switched to 1: The corresponding BTRM number <2

RF Subsystem


Signal Flow(1)Signal Flow(1) RF Subsystem

TX1_IN

TX2_IN

Main_ ANT Div._ ANTMain_RX_OUT

Div._RX_OUT

FWDCPL_OUTREVCPL_OUT

DDU/CDU

A_Main_RX_IN

A_Div._RX_IN

A_FWDCPL_INA_REVCPL_IN

B_Main_RX_IN

B_Div._RX_IN

B_FWDCPL_INB_REVCPL_IN

A_Rm1A_Rm2

A_Rm3/B_Rm1

A_Rm4/B_Rm2

A_Rd1

A_Rd2A_Rd3/B_Rd1A_Rd4/B_Rd2

RLDU

Non-transmit diversity mode

PA_IN PA_OUT

BHPAPA_IN PA_OUT

BHPABTRM

TX_RFm

RX_RFmRX_RFd

BRCMBIFMTX_RFd

BTRM

TX_RFm

RX_RFmRX_RFd

BRCMBIFM TX_RFd


Signal Flow(2)Signal Flow(2) RF Subsystem


SubrackSubrack

PSU

PSU

PSU

PSU

PSU

BTS3612 has built-in power module which converts the -48V DC input to +27V DC. In full configuration 5 five PSUs can operate with 7.2KW output. These PSUs work in 4+1 redundancy to ensure the non-stop power supply, incase of any power module failure.

Power Supply Subsystem


Functional DiagramFunctional DiagramPower Supply Subsystem

Ligh

tnin

g pr

otec

tion

pow

er

dist

ribut

ion

DC/DC

Module

DC/DC

ModuleDC/DC

Module

EMIFilter-48V

+27VDC OUT

Load

.....serial port

for monitoring


PSU FacetPSU Facet

Possible causes & alarms: Input power under/over voltage, over-heated or the power supply unit is not properly plugged in.

Power Supply Subsystem


IntroductionIntroduction

BTS antenna & feeder subsystem consists of two parts:

RF antenna & feeder, and dual-satellite synchronization

antenna & feeder.

RF antenna & feeder transmits the modulated RF

signals and receives MS signals, while the dual-satellite

synchronization antenna & feeder provides precise

synchronization for CDMA system.

Antenna & feeder system


RF Antenna &FeederRF Antenna &Feeder

Inner cable

TX/RXMA

NT

RXD

CDU/DFU

Sect

or ¦A

Sect

or¦A

Sect

or¦A

Antenna

Feeder

Jumper

Jumper

BTS cabinet



Note: BTS3612 receiver is provided by CLK on BCKM.

Dual-satellite Synchronization Antenna & FeederDual-satellite Synchronization Antenna & Feeder

Inner cable

Receiver on BCKM


GPS/GLONASS receiving antenna

Feeder

Jumper

BTS3612 cabinet

Jumper

Lighting arrester

Lighting arrester

Lighting arrester


Basic TermsBasic Terms

Transmitting/Receiving frequency

Sector carrier

Cell

Sector

Resource pool

Networking


Sector, Cell, BTS, BSC and MSC Sector, Cell, BTS, BSC and MSC

CELL

BTS3612

BSC

SECTOR

MSC

Networking


Resource Pool、 Carrier、 Sector and FrequencyResource Pool、 Carrier、 Sector and Frequency

Resource Pool1

BTRM0 BTRM1 BTRM2 BTRM3



SECTOR0

SECTOR1

SECTOR2

CARRIER1 CARRIER2 CARRIER 3 CARRIER 4

BTS3612

Resource Pool2

Resource Pool3

Resource Pool4

Networking


Cabinet Configuration Scheme-01 or S1Cabinet Configuration Scheme-01 or S1

CDU/DFU

RLDURLDU RLDU

BHPA

BTRX

CDU/DFU

PSU

PSU

PSU

PSU

PSU

PSU

F A N F A N

Baseband frame

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BHPA

BHPA

BTRM

BHPA

BTRX

CDU/DFU

CDU/DFU

CDU/DFU

CDU/DFU

CDU/DFU

Configuration SchemeConfiguration Scheme

1HPA + 1BTRM

1 DFU/CDU/DDU

1RLDU

PSU 1+1 standby

Networking


CDU/DFU

RLDU

BHPA

BTRX

CDU/DFU

PSU

PSU

PSU

PSU

PSU

PSU

F A N F A N

Baseband frame

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BHPA

BHPA

BTRM

BHPA

BTRX

CDU/DFU

CDU/DFU

CDU/DFU

CDU/DFU

BHPA

BHPA

BHPA

BTRM

BHPA

BHPA

BHPA

BTRM

RLDURLDU RLDU

Cabinet Configuration Scheme- S111Cabinet Configuration Scheme- S111


3HPA + 3BTRM

3CDU/DFU/DDU

3RLDU

PSU1+1 standby

Sector 0 Sector 1 Sector 2

Networking


Cabinet Configuration Scheme-S222Cabinet Configuration Scheme-S222


6HPA+6BTRM

3CDU/DDU

3RLDU

PSU 2+1backupCDU/DFU

RLDU

BHPA

BTRX

CDU/DFU

PSU

PSU

PSU

PSU

PSU

PSU

F A N F A N

Baseband frame

BHPA

BTRX

BHPA

BTRX

BHPA

BHPA

BHPA

BTRM

CDU/DFU

CDU/DFU

CDU/DFU

CDU/DFU

BHPA

BHPA

BHPA

BTRM

BHPA

BHPA

BHPA

BTRM

RLDURLDU RLDU

BHPA

BTRX

BHPA

BTRX

BHPA

BTRX

BHPA

BHPA

BHPA

BTRM

BHPA

BHPA

BHPA

BTRM

BHPA

BHPA

BHPA

BTRM

Sector0 Sector1 Sector2


Let us conclude our discussion now…..Let us conclude our discussion now…..


Product Performance (1)Product Performance (1)

Abis interface Use the IMA technique and support the E1 interface (16E1s) Support the E1 mode in SDH Support ATM over SDH (compatible interface)

The traffic and control bus adopt CELLBUS. Switching bus AAL2 transports the traffic data and AAL5 transports the signaling data Bus clock is 25MHz

External interfaces include: RS485 power monitoring interface RS485 interface to support the environment monitoring External time reference interfaces (RS485 and RS232) 10MHz, PP2S interfaces used for instrument testing


Built-in GPS and GLONASS receiver

Built-in testing functions Perfect heat dissipation: upper and lower ducts



Technical Features of Power Supply subrackTechnical Features of Power Supply subrack


Input voltage: -48V

Output voltage: +25V ± 0.5V ~ +29V±0.5V

Power modules: 1800W each module 9000W in total

Power efficiency: 85%

Heat dissipation: upper and lower grid with fans

Hot swappable

Provides RS485 monitoring interfaces


Technical Features of RF ModuleTechnical Features of RF Module


Modular architecture

Each cabinet supports 12 antennas and 6-sectors application

BTRM supports the digital intermediate frequency technology

BTRM offers the fiber interface to support remote RF module

BTRM supports receiving and transmitting diversities

Each sub-module fulfills the blind mate

Provides the power monitoring RS485 interface which is used

for remote RF modules


Technical Features of RF ModuleTechnical Features of RF Module


RF front end adopts the CDU/DFU+RLDU mode

Each cabinet supports 6 sectors

Each sector supports the 4FA/2 antenna and space receiving diversity

Supports the transmitting diversity

HPA and BTRM modules with fans follows the combination structure with

front and rear ducts

Front cabling makes installation and maintenance convenient


Thermal Design of Integrated EquipmentThermal Design of Integrated Equipment


The dissipation power of the integrated equipment is about 7000W.

Thermal design of large power module.

Front/rear duct and independent duct.

The distribution structure is adopted to reduce the heat generation density

at certain point.

Holes at both the front and rear doors for ventilation.

The small power modules adopt upper and lower ducts to reduce the

number of cascades.

Automatic speed controller to regulate the fans speed.


QuestionsQuestions

Describe the signaling flow from MS to BSC?Describe the traffic flow from MS to BSC?Describe the O&M flow from MS to BSC?


SIG

OMU

BRDM

BCIM

Abis signaling

BHPA

BHPA

BHPA

BCPM

BCPM

BCPM

BCPM

MMI

CDU

CDU

Abis OML

Abis traffic

CDU

BCKM

CLK

BTRM

BTRM

BTRM

BTRM

AnswersAnswers

CellBus

CellBusGbit Ethernet (electric interface

Gbit Ethernet (optical transmission

RLDU

RLDU

BHPA

Traffic and Signaling Flow in BTS3612

ORI001102 CDMA WLL BTS3612 Hardware System ISSUE3.0

Documents

Transcript of ORI001102 CDMA WLL BTS3612 Hardware System ISSUE3.0