6-zxwr node b system 71

ZXWR Node B System

ZTE University

TD&W&PCS BSS Course Team

Objectives

At the end of this course, you will be able to:

Understand ZXWR Node B family

Master ZXWR Node B09 functional boards

Master ZXWR Node B09 system structure

Master ZXWR Node B09 configuration

Content

ZXWR Node B Family

ZXWR Node B09 Hardware Structure

ZXWR Node B09 system configuration

ZXWR BBUB/R8840 Hardware structure

ZXWR Node B Family

Position of Node B in the network

RNS RNS

NodeB NodeBNodeB NodeB

RNC

CN

RNC

Iu Iu

Iur

Iub IubIub Iub

UE

Uu

ZXWR Node B Family

Functions of Node B

B09 implements radio link transmission with UE on Uu interface, including:

RF processing

Channel encoding/decoding and multiplexing/demultiplexing

Spread spectrum modulation/despreading demodulation

Measurement and reporting

Softer handover and power control

Diversity

Compression mode

Radio service data transmission and control

Synchronization

ZXWR Node B Family

Functions of Node B

B09 connects RNC through Iub interface and completes

following functions:

Reporting Node B measurement information

Forwarding system information broadcast provided by RNC

Executing access control, mobility management, radio

resource management and control commands delivered by

RNC.

ZXWR Node B Family

ZTE Node B Family

Dense UrbanDense UrbanBlind ,hotspot, particular sceneBlind ,hotspot, particular scene

Dense Urban（outdoor）Dense Urban（outdoor）Normal city、suburban、rural Normal city、suburban、rural

High CapacityHigh CapacityMiddle CapacityMiddle CapacityIndoor CoverageIndoor Coverage

ZXWR B09C

ZXWR R8840

ZXWR BBUB

ZXWR P8925（Pico RRU）

ZXWR P Bridge（Pico Hub）

ZXWR H8901ZXWR R8905

ZXWR BBUC

ZXWR B06C

ZXWR B09ZXWR B03C

Content

ZXWR Node B Family





The smallest 9CS NodeBin the world

E1 interfaceTower AmplifierEnvironment Monitor

Macro Node B -- ZXWR B09

Power SupplyCooling Fan

TRX Unit Shelf

Ventilation

Power Amplifier ShelfCooling Fan

Size: 1200×600×600 (mm)Weight: 200 kg


ZXWR B09 Boards Arrangement

Power amplifier fan

Em

pty

LPA

LPA

LPA

LPA

Air inlet, cabling trough

CCS

IIA

IIA

RBI

BP

BP

BP

BP

BP

RBI

CCS

TRXU

DDL

TRXU

DDL

TRXU

DDL

RDM

Fan, cabling trough

Transmission-embedded

Rack top

PDM ,ET×2,EMU , TAC

LPA

LPA


Node B System Architecture

ZXWR B09 system consists of

Power distribution subrack

Transmission subrack

Ventilation subrack

Control baseband &RF subrack

Power amplifier subrack

Power amplifier fan subrack


Power distribution subrack

Power Distribution Module (PDM) Receiving external -48 V power supply

Distributing -48 V power supply to every layer of the cabinet

E1 transit board (ET)E1 transit

Environmental Monitor Unit (EMU)Providing interfaces with external environmental monitoring devices, including RS232 or RS485 serial ports

Fan monitoring

Ethernet port communication

Voltage detection, report, alarm indication of system power supply

Providing access of lightning protection signals

Tower Amplifier Control Board (TAC)Tower amplifier power supply and protection

Receiving -48 V power supplied by EMU subsystem

Serial port communication


Control baseband &RF subrack

Control Clock Switching board (CCS)

Iub Interface over ATM board (IIA)

Baseband Processing board (BP)

RF Baseband Interface board (RBI)

Transceiver unit (TRXU)

Dual Duplex LNA (DDL)

RF Detection & Measurement board (RDM)

Backplane of Controlling Baseband & RF (BCBR)


CCS

Control Clock Switching Board (CCS) implements following functions: Ethernet switching function and supporting data exchange of system internal service stream and control flow

Monitoring, controlling, and maintaining BTS system

Managing versions of board software and programmable logic devices and supporting local and remote version upgrade

Monitoring the running status of each board in the system

Synchronizing various external reference clocks External clock

Generating and distributing clock signals required by each part

Providing GPS receiver interface and managing GPS receiver

Providing board power supply interfaces

Reading various hardware management IDs in the system: rack number, backplane type number, slot number, board function type, board version, and board function configuration ID

Active/standby changeover and reset function

Supporting active/standby hot backup


CCS


IIA

Iub Interface over ATM Board (IIA) implements following functions:

Providing the physical interface with the RNC and completing the ATM physical layer processing of the Iub interface

ATM adaptation layer processing

Receiving and sending signaling data and user data

ATM cell exchange between two STM-1 optical interfaces and between an STM-1 interface and an E1/T1 interface.

IIA system supports extracting clock from an STM-1 interface or E1T1 interface, dividing frequency at 8 KHz, and sending it to CCS as clock reference.

In addition, IIA supports providing clock required by the board through free oscillation without CCS.

Board individual power-off reset


IIA


BP

Baseband Processing Board (BP) processes physical layer protocols

and frame processing protocol specified by 3GPP.

Downlink service data encoding/multiplexing, rate adaptation, channel

mapping, spread spectrum scramble, power weight, and channel synthesis.

RAKE reception of uplink signals and channel decoding

Radio link synchronization and transmission frame processing

Parameters required for measuring power control and handover

Softer handover and diversity receiving/transmitting

Communicating with CCS via Ethernet interface

Providing uplink and downlink IQ links



BP


RBI

RF Baseband Interface Board (RBI) implements following functions:

Demultiplexing received downlink IQ signals

Multiplexing overlaid IQ signals and sending them to remote RF unit (RRU) or TRXU board

Receiving uplink IQ signal sent by remote RF module (RRU) or TRXU and demultiplexing the signal

Multiplexing uplink IQ signal

Monitoring link status, clock signal, working status of Ethernet interface, and running status of each part inside RBI

Supporting to check status of active/standby status control line and status notification

Active/standby swithover function



RBI


TRXU/PTR

Transceiver Unit (TRXU/PTR) implement following

functions:

Uplink/downlink signal processing

System clock processing

Ethernet port communication

Power supply function and power-on/off function

Supplying power to DDL



TRXU/PTR


PTR


DDL

Dual Duplexer and LNA DDL implements the following

functions:

Transmitting and receiving RF channel filtering

LNA output for uplink

Providing the forward detection signal path

Providing the inverse detection signal path

Providing the coupling test channel

Providing the DDL alarm detection


DDL


Power amplifier subrack

Linear power amplifier (LPA30)RF signal amplification

Supporting remote software download

Alarm report

Overcurrent, over-temperature, and overpower protection

Serial port communication

Power divider PDV (optional and for OTSR)Power divider (PDV) is to configure the system as OTSR. In this case, no diversification exists during transmission; one sector transmits and three others receive.

PDV divides one channel of signal into three channels of signals and send them to DDL.

Backplane of Linear Power Amplifier (BLPA)Providing RF signal interfaces for DDL and TRXU

Providing serial bus interface for communication with the system

Supplying power to LPA


HPA30A


TOP VIEW


ZXWR B09 Service Data Stream

Air intake, wiring chute

CCS

IIA

IIA

RBI

BP

BP

BP

BP

BP

RBI

CCS

TRXU/PTR

DDL

TRXU/PTR

DDL

TRXU/PTR

DDL

RDM

Null

LPA30/HPA

LPA30/HPA

LPA30/HPA

LPA30/HPA

LPA30/HPA

LPA30/HPA

ANT


ZXWR B09 Service Data Stream

CCS

IIA

IIA

RBI

BP

BP

BP

BP

BP

RBI

CCS

TRXU/PTR

DDL

TRXU/PTR

DDL

TRXU/PTR

DDL

RDM

ANT

Content

ZXWR Node B Family





ZXWR B09 Boards Arrangement

Power amplifier fan

Em

pty

LPA

LPA

LPA

LPA

Air inlet, cabling trough

CCS

IIA

IIA

RBI

BP

BP

BP

BP

BP

RBI

CCS

TRXU

DDL

TRXU

DDL

TRXU

DDL

RDM

Fan, cabling trough

Transmission-embedded

Rack top

PDM ,ET×2,EMU , TAC

LPA

LPA


CCS Configuration Requirements

Configure CCS as backups (two) or non-backup (one) as

required.

It is better to configure CCS as backups to improve the

system reliability, for CCS is control core of Node B.

Active/standby handover can ensure that the system runs

normally in case a CCS becomes faulty.


BP Configuration Requirements

BP configuration rules:

Insert BP directly into RBI slot when number of subscribers to support is small, and there is no need of supporting the remote RF unit. Insert two BP boards at the most in this case. Do not insert RBI any more. Forbid inserting any board on the five BP slots.

RBI is required with a large number of subscribers or if remote RF signal is to be supported. In this case, configure BP as required and 5 at most.

One BP supports a maximum of 3CS services. To support 9CS, at least 3 BP boards are required.



One single BP board can supports:

CS12.2K： 128 subscribers ；

Bi-directional PS64K： 64 subscribers ；

CS64K： 64 subscribers ；

Uplink ps64k/Downlink ps144k： 36 subscribers ；

Uplink ps64k/Downlink ps384k： 18 subscribers ；

HSDPA： totally support 14.4M flow



Formulas for calculating the number of BP boards required in the case

of 2-antenna receiving diversity:

Definition:

A = Quantity of CS 12.2 kbps subscribers/128

B = Quantity of bi-directional 64 kbps subscribers/64

C = Quantity of PS uplink 64 kbps downlink 144 kbps subscribers/36

D = Quantity of PS uplink 64 kbps downlink 384 kbps subscribers/18

X = Resource factor reserved for handover, generally 0.3

Quantity of BP boards to configure = [(A + B + C + D) × (1 + X)]

( [ ] is the round-up symbol )


IIA Configuration Requirements

Each board supports 2-channel STM-1 or 8-channel

E1/T1.

2 IIA boards are required when using more than 8

channels of E1/T1 and 16 channels at most.


PTR Configuration Requirements

PTR, together with HPA30A/HPA60 and DDL, forms a

digital pre-distortion RF transceiving sub-system unit.

Each PTR board supports 3C1S .

Therefore, configure 3 PTR boards in the case of 3S

configuration.


DDL Configuration Requirements

DDL provides two lines of receiving and transmitting

channels, and supports two antennas, as two duplexers.


HPA30A Configuration Requirements

HPA30A supports 2C and its power is 30 W.

Each HPA30A supports 1-antenna transmission. Three

HPA30A boards are required in the case of 3S

transmission non-diversity. Six HPA30A boards are

required in the case of transmission diversity. One

HPA30A board is required in the case of 1S omni transmit

and transmission non-diversity.


Maximum Configuration

Power amplifier fan


Fan, wiring chute

Embedded transmission

(Set-top) PDM, ET/ETT * 2, EMU, TAC

CCS

IIA

IIA

RBI

BP

BP

BP

BP

BP

RBI

CCS

TRXU/PTR

DDL

TRXU/PTR

DDL

TRXU/PTR

DDL

RDM

Null

LPA30/HPA

NullNullNull

LPA30/HPA

LPA30/HPA

Maximum Configuration for 1C3S with Receiving Diversity and Transmission Non-diversity



Power amplifier fan


Fan, wiring chute



CCS

IIA

IIA

RBI

BP

BP

BP

BP

BP

RBI

CCS

TRXU/PTR

DDL

TRXU/PTR

DDL

TRXU/PTR

DDL

RDM

Null

LPA30/HPA

LPA30/HPA

LPA30/HPA

LPA30/HPA

LPA30/HPA

LPA30/HPA

Maximum Configuration for 1C3S with Receiving Diversity and Transmission Diversity



Power amplifier fan

Air intake, wirng chute

Fan, wiring chute



CCS

IIA

IIA

RBI

BP

BP

BP

BP

BP

RBI

CCS

PTR

DDL

PTR

DDL

PTR

DDL

RDM

Null

HPA60

HPA60

HPA60

Maximum Configuration for 3C3S with Receiving Diversity and Transmission Non-diversity



Power amplifier fan


Fan, wiring chute



CCS

IIA

IIA

RBI

BP

BP

BP

BP

BP

RBI

CCS

PTR

DDL

PTR

DDL

PTR

DDL

RDM

Null

HPA60

HPA60

HPA60

HPA60

HPA60

HPA60

Maximum Configuration for 3C3S with Receiving Diversity and Transmission Diversity


Cable connection

TRXU DDL

HPA


Cable connection

TRXU DDL

HPA HPA

Content

ZXWR Node B Family





Overview

BBUB/R8840 system structure


BBUB System structure

Physical Structure

The volume of BBUB is: 132mm×482mm×330mm (H×B×D)



The layout of ZXWR BBUB



Hardware structure

The BBUB cabinet comprises the following major units:

BP (Base Band Processing Board）

CCI (Clock, Control and Interface Board)

ETTB (E1/T1 Interface Board)

FNB (FE Interface, Input/Output node point interface,

RS232/RS485 Interface Board)

FAN (Fan Module)

BPWA( Power Module)



BP (Base Band Processing Board)

The BP board processes the physical layer protocol and frame

processing protocol specified by the 3GPP, including:

Downlink service data coding/multiplexing, rate matching, channel

mapping, frequency spread and scrambling, power weighting and

channel synthesis

Uplink signal RAKE receiving and channel decoding

Radio link synchronization and transmission frame processing

Measuring parameters required in power control and handover

Softer handover and transceiving diversity.

Communicating with the CCI via the Ethernet interface



Providing IQ uplink/downlink

Reading all the hardware management identifiers, including the backplane type number, slot number, board function type, board version, board function configuration identifier, and the CPU serial number

Resetting upon power failure of a single board

One BBUB supports at most 4 BP boards. These 4 BP boards can serve as a baseband pool, which realizes base band resource sharing.

Operation and Management of the Distributed Base Station system including BBUB and RRU.

Iub interface protocol processing (NBAP, SSCOP and ALCAP)

Ethernet switching function, implementing data exchange for base band service flow and control flow in the system

Distribution of system clock and synchronization signal



CCI (Clock，Control and Interface Board)

Operation and Management of the Distributed Base Station system including BBUB and RRU.

Iub interface protocol processing (NBAP, SSCOP and ALCAP)

Ethernet switching function, implementing data exchange for base band service flow and control flow in the system

Distribution of system clock and synchronization signal

Providing interface to RRU

Environment monitoring includes power, temperature fan and etc.



Providing a physical interface to the RNC,

performing information exchange between

BBUB and RNC.

Providing IPOA channel to OMC-B

Support ATM and IP access

Support various transmission interfaces,

includes 2 STM-1, 6RRU fiber interface，and

1 LMT interface



ETTB（E1/T1 Interface Board）

ETTB provides the following functions: Lighting protection and spectrum filter function, and active/standby switchover CCI boardsEach ETTB board supports 4 E1/T1. BBUB can support 8 E1 at most while 2 ETTB boards configuredTo support 2 E3/T3 interfaces, the ETTB board is replaced by E3/T3 interface board



FNB (FE Interface, Input/Output node point interface, RS232/RS485 Interface Board)FNB provides the following functions:

Provide 2 FE interfaces and protection circuit for these interfacesProvide 6 Node Point (input/output) interfaces and protection circuit for these interfacesProvide 1 RS232, 1 RS485 (full duplex/semi duplex compatible) interfaces and protection circuit for these interfacesConfigure these interfaces according to requirement.



FAN( Fan Module)

BBUB has 6 fans. The FCB (Fan Control Board) inside the

rack controls the fans in two groups to realize rotate speed

detection and control.

FAN shelf supports hot-plugging. Air filter can be configured

at the right side of FAN shelf.

BPWA (Power Module)

Power conversion, filter and lighting protection functions.

Supports -48V DC power inputs.


R8840 System Structure

Mechanics The R8840 employs compact cabinet design.Dimension of R8840 is H×W×D＝360×320×165 mm3

.

3

.

R8840 Physical Structure



Hardware Structure of R8840



RTR (RRU Transceiver)

The RTR has following functions:

Process received signal and transmit signal;

Radio signal uplink convert and downlink convert;

Downlink IQ signal multiplexing, uplink signal de-multiplexing;

Signal amplifying, filter, A/D convert, D/A convert;

Convert between optical signal and electric signal, optical wave

multiplexing;

Capture reference signal from base band unit and provide the

reference clock signal to other units;



• Standing wave measurement and report;• Hardware failure self-detection;• Alarm report;• Environment temperature monitor; • Provide communication interface: 2 CPRI interfaces, 2 external alarm input nodes, 2 external alarm port output nodes, 1 RS485 serial port for external monitor equipment communication, 1 fast Ethernet port and 1 RS232 serial port for LMT, 1 AISG for electrical tilt antenna, 1 co-cabinet port for realization of co-cabinet;• Reset function;

DFL (Duplex Filter LNA): The DFL has following function:• Combined and isolate transmitted and received signal;• Filter the transmitted signal and received signal;• LNA (low-noise-amplifier) function;• LNA alarm report to RTR;



PA (Power Amplifier)The PA has following function:

Performs radio signal amplifying function;

Temperature report function;

Over-current, over-heat, over-power, over-standing wave protecting function;

RPW AC/DC (RRU Power AC/DC)The RPWAC/DC has following function:

RPWAC is the power unit for AC and RPWDC is the power unit for DC;

AC to DC or AC to AC convert function;

Alarm report to RTR for low-voltage, over-voltage, over-current etc.


Interface of R8840

6-zxwr node b system 71

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