ZXSDR Node B Structure and Principle.pdf

ZXSDR NodeB System Introduction

ZTE University

Content

Node B PrinciplesNode B Principles

BBU+RRU System Overview

B8200 Hardware System Structure

R8840/RSU40 Hardware System Structure

I t d ti f SDR 8000 S i P d tIntroduction of SDR 8000 Series Products

Configuration and Networking of B8200 andConfiguration and Networking of B8200 and

R8840

Node B Principles - Signal Transceiving Pathp g g

Uplink signals

Downlink signals

Uplink signals

Downlink signals

Node B Principles - BBUB Networkingp g

N*E1

N*E1

Node B Principles - RRU Networkingp g

RRU

BBUB

RRURRU

RRU

RRU RRU

RRU

Optical fiber

Content







R8840

Module Composition - BBUp

BBU

Iub interface Baseband processing RRU interfaceIub interface RRU interfaceRNC RRUmodule module moduleRNC

RRU

Main control module (CPU)

Module Composition - R8840p

Main Functions of Node B

Fulfill radio link transmission with UE at Uu interface Connect with RNC through Iub interface to fulfill the following

functions: Reporting Node B measurement information Forwarding system information broadcast provided by RNC Performing access control, mobility management, radio resource management, and control

command delivered by RNC

Fulfill local environment monitoring Fulfill local environment monitoring.

Concepts about Distributed Base Stationp

It is baseband data that is tranmitted between BBU and RRU. B th i t di t f d di fBoth intermediate frequency and radio frequency are processed in outdoor RRU.

BBU and RRU transmits data through optical fiber, significantly g p , g ysimplifying project construction.

Concept of baseband pool. Node B capacity increases.

Iub

TRX

Iub

(BBU) (RRU)

Concepts about Distributed Base Stationp

PoleAntenna

Feeder Optical fiber

Difference between BBU+RRU and General Node B

A distributed base station consists of two separately-developed, mutually-independent parts. It uses optical fibers instead ofmutually independent parts. It uses optical fibers instead of many radio frequency cables to reduce feeders and save costs significantly. This results in decreased project costs, improved networking flexibility and convenient installationnetworking flexibility, and convenient installation.

BBU+RRU Advantagesg

MSC ServerMSC Server GGSNGGSNMGWMGW

RNCRNC RNCRNC

SGSNSGSN

RRU

RRU

Small scale baseband

pool

Large/medium scale baseband

pool BBU

RRU

RRURRU

RRURRU

RRU

RRU

RRU RRU RRURRU

BBU+RRU is free from the limitation of auxiliary facilities, with fast, flexible networking,

RRU

as well as reduced costs in networking, operation, and maintenance.

BBU+RRU - A More Effective Way to Deal with Equipment Room ShortageEquipment Room Shortage

Setup Method

Use the BBUB + RRU networking mode; Place the baseband pool equipment in the 19" rack, or mount it on the wall in the existing equipment room;equipment room; Lay the antenna feeder plane optical fiber from the baseband pool equipment room to the planned 3G site;U td RRU t th l d 3G it f

Advantages

Use outdoor RRU at the planned 3G site for coverage.

d a tages

Full use of the existing equipment rooms, no need for new ones; Strong upgrade capability; low loss feeders; Strong upgrade capability; low-loss feeders; No need for new transmission networks.

It effectively solves the problem of equipment room shortageIt effectively solves the problem of equipment room shortageIt effectively solves the problem of equipment room shortage. It effectively solves the problem of equipment room shortage.

BBU+RRU Base Station Solves Feeder Overlength ProblemOverlength Problem

Signal loss in feeders will result in degraded coverage performance. The 2G Hz radio frequency signal travels in feeders at a loss of q y g

7dB/100m, and 900M Hz 4dB/100m. Generally, the feeder length of 3G sites is 50 meters, with a signal

loss of about 4dB. RRU makes RF be possibly closest to the antenna to minimize the RRU makes RF be possibly closest to the antenna to minimize the

signal loss in feeders. By using BBU+RRU, signal loss in feeders can be reduced to less

than 1dB. Base station antenna

7/16 female RF connector

RET

1/2 super flexible jumper

7/8 main feeder cable, with female

Outdoor grounding cable cl ip

1/2 super flexible jumper BTS equipment room

Feeder cl ip

ZXWR series RRUs

NO

7/8 main feeder cable, with female

RF connectors at both sides

j

Lightning arrester

Outdoor lightning prot ection grounding clip

ZXWR

ZXWR series RRUs

B

ODE

Feeder cable window

Indoor grounding cable clip BBUB

Features and Advantages of SDR Soft Base StationStation

SDR Base Station SDR Base Station -- Software Defined Radio Base StationSoftware Defined Radio Base Station

Single cabinet Features of SDR base station:

The 2G-3G base stations share cabinets.

The 2G-3G base stations share radio frequency modules. This is

hi d b ft fi ti

RURURURURURU

New-generation RF modules and baseband modules

Intelligent architecture. Software configurations

achieved by software configurations.

The 2G-3G base stations share baseband modules. This is

achieved by software configurations.

The 2G-3G base stations share network management.

2G/3G BB

Software configurations support 2G or 3G processing.

The 2G-3G base stations share antenna feeder systems.

Ad t f SDR B St ti2G/3G BB

2G BB

3G BB

Advantages of SDR Base Station

It solves the capacity balance problem between GSM network and WCDMA network. It reduces the overall network TCO.3G BB

Module sharing It meets the requirements for future network evolution and spectrum sharing.

SDR Is Suitable for Various Networking Scenarios.g

Example: 900MHz and 2100MHz applications

Application TypeApplication Type SDR Base Station ConfigurationSDR Base Station Configuration1 GSM 900MHz Configure RU modules to GSM 900MHz RF units.22 UMTS 2100MHz Configure RU modules to UMTS 2100MHz RF units.3 UMTS 900MHz Configure RU modules to UMTS 900MHz RF units.

4 GSM900 + UMTS 2100MHz Configure partial RU modules to GSM 900MHz RF units. Configure partial RU modules to UMTS 2100MHz RF units.Configure partial RU modules to UMTS 2100MHz RF units.5 GSM900 + UMTS 900MHz Configure RU modules to support GSM and UMTS900MHz RF units.

SDR base station can help operators operate GSM and WCDMA in one network.

Traditional 2G-3G hybrid networking Two networks for physical equipment (radio side)

SDR-based 2G-3G hybrid networking One network for physical equipment. Two networks for physical equipment (radio side).

One network for operation. Two networks for operation and maintenance.

One network for physical equipment. One network for operation. One network for operation and maintenance.

Introduction of ZTE Series Soft Base Stations

ZXSDR 8000 high performance integrated b t ti i ti lti lbase station is a new-generation multiple-module base station launched by ZTE Corporation based on the SDR platform. It centers on the baseband pool unit B8200 centers on the baseband pool unit B8200, and consists of indoor RF module RSU40/RSU60, outdoor RRU R8840, and indoor-coverage micro RRU R8810. Through flexible module combinations, ZXSDR 8000 can build indoor macro base station BS8800outdoor macro base station BS8900, and di t ib t d b t ti D B8200 t t distributed base station D-B8200 to meet full-scenario coverage requirement and create 3D WCDMA coverage network.

ZXSDR 8000 High Performance Integrated Base Station- "Local + Remote" Integrated Coverage Solution of Macro Base Station

BS8800 supports 30CS in WCDMA single-mode

Local + Remote Integrated Coverage Solution of Macro Base Station

configuration, and can provide S111, S222, S333, and

S444 or S222222 typical configuration for local coverage;

BS8800+R8810 BS8800+R8840Outdoor coverage

that is, its largest capacity is 12CS.

After meeting the 12CS local coverage requirement,

BS8800 has a remaining capacity of 12CS, which

In-depth indoor coverage in

large buildingsBS8800 local coverage enables not only outdoor coverage in adjacent areas

through R8840 remote mode, but also indoor coverage

large buildings

in such adjacent indoor scenarios as high-end office

buildings, shopping malls, and conference centers

through R8810 remote mode.This is the "local + remote" g

integrated coverage solution centered on BS8800.

ZXSDR 8000 High Performance Integrated Base Station- Integrated Coverage Solution of Distributed Base Station D-B8200Integrated Coverage Solution of Distributed Base Station D B8200

As a distributed base station, D-B8200 features easy deployment and flexible networking. It is mainly used in the places where there is no equipment room or enough room

R8840

p q p gspace or sufficient floor bearing capacity, or where the distance between the equipment room and the antenna feeder plane is too large, to replace traditional indoor macrocellular base stations and meet the coverage

B8200

Camouflage antenna

D-B8200Plane

coverage

grequirement in dense urban areas, general urban areas, special scenarios, and indoor scenarios.

Camouflage antenna

coverage

D-B8200Point coverage

R8840 R8840

R8840

B8200

R8810

R8840

D-B8200Li

B8200

Line coverage

Content







R8840

ZXWR B8200 Hardware Structure

Network switching module (FS)Power module (PM) Baseband processing board (BPC)

Fan module (FA)Control and clock module (CC)Site alarm module (SA)


Required boards: Power module (PM): -48VDC power module, which provides power supply for B8200 boards Site alarm board (SA): It provides eight ways of E1/T1 interfaces, RS485/232 interfaces, and eight dry contact

interfaces (six input interfaces and two dual way interfaces)

Required boards:

interfaces (six input interfaces and two dual-way interfaces) Control and clock board (CC): It fulfills baseband unit control and management and provides self-adaptive Abis/Iub IP

interface GE/FE (optical or electrical interface).Fib it h b d (FS) It i f ti i t it h IQ i l It t i fib i t f d i d f Fiber switch board (FS): Its main function is to switch IQ signals. It supports six fiber interfaces and is used for connection with RRU or RSU module.

WCDMA baseband processing board (BPC): It supports 6CS and uplink or downlink 192CE. It also supports a 43.2Mbps downlink or 15Mbps uplink data processing capability.

Fan module (FAN): It is located at one side of the subrack for heat dissipation.

Optional boards: STM-1 network interface board (NIS): It provides two STM-1 interfaces. Site alarm extension board (SE): As an extension board of SA, it provides the same interfaces as the SA board does. GSM baseband processing board (UBPG): It supports 12TRX.


Sector configurations: Performance IndicesPerformance Indices

2U 88.4mm WCDMA: 30CS

GSM: 60TRX

Baseband capacity: 960CE

482.6mm Data processing capability: HSDPA: 216Mbps

HSUPA: 75Mbps

Mechanical dimensions:

UL: 192CEDL: 192CEHSDPA: 43.2MbpsHSUPA: 15Mbps

BPC processingcapability Physical IndicesPhysical Indices

Mechanical dimensions:

88.4482.6197mm (HWD) Weight (full configuration): 8.75kg

Typical power consumption: 75W Abis/Iub interface:Interface IndicesInterface Indices

Typical power consumption: 75W

Power supply: -48V DC

Temperature range: -15+50 Humidity range: 5%95%

2*STM-1; 16*E1/T1; 2*FE/GE Baseband RF interface: 12*1.25Gbps optical

interface

Humidity range: 5%95%

ZXWR B8200 Functions

It provides ATM/IP dual-mode protocol stack, and supports Hybrid IP and All IP networkingnetworking.

It supports WCDMA/GSM dual-mode configuration.

Under WCDMA single-mode configuration, Phase I supports 128CE/3CS; Phase II supports 192CE/6CS and provides a baseband processing capability of 24CS.

Under GSM single-mode configuration, it provides a baseband processing capability of 60 carrier frequencies.

It supports smooth upgrade towards EDGE/HSPA+/LTE.

It supports HSPA: 14.4/5.76Mbps(DL/UL).

ZXWR B8200 Functions

It supports MBMS and 4x256kbps / 8x128kbps / 16x64kbps access modes.

It enriches Iub/Abis interface types by providing multiple interfaces such as E1/T1, STM-1, FE, and GE to meet different networking requirements under various transmission conditions.various transmission conditions.

It provides 12 pairs of 1.25G CPRI interfaces.

It supports WCDMA R99, R4, R5, R6, and R7 versions, and supports R8 after evolution.

It supports GSM Phase I/Phase II/Phase II + versions.

Control & Clock & Switch Board (CC) ( )

Interface Name Description

ETH0 An Ethernet interface that is used between BBU and RNC or BSC. There are two types of ETH0 interfaces on the panel, that is, optical interface and electrical interface (10M/100M/1000M self-adaptive).

ETH1 It is used for BBU cascade, debugging or local maintenance. Ethernet electrical interface (10M/100M/1000M self-adaptive).

EXT An external communication interface that connects with external receivers. It mainly includes 485 and PP1S+/2M+ interfaces.

REF An SMA (F) interface that externally connects with GPS antenna.


It has Ethernet switching function and supports the data switching between service flow and control flow in the systemservice flow and control flow in the system.

It handles Iub interface protocols (NBAP, SSCOP, and ALCAP). It monitors, controls, and maintains base station systems. It manages the versions of board software and programmable logic devices in It manages the versions of board software and programmable logic devices in

the system, and supports local and remote version upgrade. It monitors the working condition of the boards in the system. It synchronizes external reference clocks It synchronizes external reference clocks. It generates and distributes the clock signals required by individual parts in the

system.


It provides GPS receiver interface and manages GPS receivers. It provides board power interfaces ( 48V 48V ground PGND and DGND) It provides board power interfaces (-48V, -48V ground, PGND, and DGND),

and provides reverse connection protection for the power supply. It reads system hardware management IDs: rack No., backplane type, slot No.,

board functions, board version, and board function configuration ID.board functions, board version, and board function configuration ID. It has active/standby switchover and reset functions. It supports active/standby hot backup function.

Fiber Switch Board (FS) ( )

Interface introduction: Tx0/Rx0 Tx5/Rx5: It provides the optical interface that connects with Tx0/Rx0 - Tx5/Rx5: It provides the optical interface that connects with

RRU. Board functions: It switches baseband I/Q data. It provides the interface between BBU and RRU.

Baseband processing board (BPC) p g ( )

BPC fulfills the physical layer protocol and frame protocol specified by 3GPP. It performs such functions as downlink service data encoding/multiplexing,

rate matching, channel mapping, spread scrambling,power weighting, and channel synthesis.

It fulfills RAKE reception and channel decoding of uplink signals. It synchronizes radio links and processes transmission frames. It measures the parameters required for power control and handover. It has softer handover and diversity reception/transmission functions.

SA Panel Cables

Grounding

Connect with E1/T1 cable

Connect with Connect with RS232 and

RS485 debugging serial

ports

Connect with dry

Connect with SA board panel

socket

Co ect t d ycontact signal

cable

Site Alarm Board (SA) ( )

SA Board functions:It t l t l d d t l f t i f It supports alarm control and speed control of up to nine fans.

It provides signal monitoring and interface lightning protection for the shelf at which it is located.

It provides six input dry contact interfaces and two input/output dry contact interfaces.

It provides eight E1/T1 interfaces.p g

Content







R8840

R8840/RSU40 Hardware Structure

The R8840 is a high-power outdoor The R8840 is a high power outdoor remote RF unit and the RSU40 is a high-power indoor RF module from ZTE.ZTE.

The R8840 and RSU40 have the same inner transceiver unit, power amplifier, duplex filter and power module asduplex filter, and power module, as well as the working principle and software structure. They mainly differ in the physical structure.p y

R RRU 8 WCDMA 8 Outdoor 40 40 W R8840 RSU40


320 mm 165 mmZXSDR R8840: outdoor macro RRU360

m

S t fi ti

Performance IndicesPerformance Indices

mm Sector configurations

1C1S to 4C1S Transmit power: 40 W/60 W

Small and light

p

Receive sensitivity

-129.2 dBm@dual antennas Physical IndicesPhysical Indices

Interface IndicesInterface Indices

Dimensions: 370 mm x 320 mm x 160 mm

Weight: 16.5 Kg

Standard power consumption: 140 W

Baseband RF interface: 2 x 1.25 GHz optical interface

Interface IndicesInterface Indices p p

Power supply: -48 V DC, 220 V AC

Temperature range: -40oC to +55oC Protection class: IP65

Transceiver Unit RTR Provides two receiving and one transmitting signal channels

Shift i l li k d d li k di li k Shifts signals on uplink and downlink radio links Amplifies and filters signals and coverts A/D and D/A Retrieves clock reference signals through the Ir interface and provides g g

clock reference for inner modules Measures and reports VSWR Self-checks and reports hardware failure Self checks and reports hardware failure Monitors the environment Inputs external alarms

Power Amplifier Unit HPA p Amplifies RF signals Reports temperature Provides overcurrent, overtemperature, overpower, and over

standing wave protectionsstanding wave protections

Duplex Filter Unit DFL p Provides transmission/reception combination and

di idi / litti f ti f RF i ldividing/splitting functions for RF signals Provides transmit/receive RF channel filtering Provides the low noise amplifier (LNA) function Provides the low noise amplifier (LNA) function Provides transceiver unit with the LNA alarm reporting function

Power Module RPW Power modules can be divided into AC and DC power modules,

th t i RPW AC/DC If AC l i d th RPW ACthat is, RPW AC/DC. If AC power supply is used, the RPW ACis configured. If DC power supply is used, the RPW DC is configured. The RPW provides the following functions:

Coverts AC/DC power supply Provides the transceiver unit with undervoltage, overvoltage,

and overcurrent alarmsand overcurrent alarms

Ports on the R8840BBU and RRU port

or cascading RRU port

BBU and RRU portor

cascading RRU port

AISG portAntenna tuning port

Monitoring port Power portAC or DC

cascading RRU port cascading RRU port

Grounding

ANT2 ANT1 RxInRxOutReceiver diversity

RF cable portTransmit/receive main set

RF cable portfrequency point extension port

frequency point extension port

Ports on the RSU40ANT2

Receiver diversityRF cable port

ANT1Transmit/receive main set

RF cable port

BBURRUBBU and RRU port

Frequency point extension port

BBURRURRU

U a d U po tCascading RRU port

Commission network portRJ45RJ45

Test port

External equipment monitoring portmonitoring portDB15 connector

AISG equipment portRET antenna port

Power supply port

R8840/RSU40 Features

Small, light, and flexibly deployed

The R8840 is easy to transport because the size and weight of the R8840 are 19 L and 16.5 kg respectively. It can be installed on the outdoor pole, wall, platform, and tower. Therefore, the restrictions of equipment room and auxiliary equipment are removed and the 3G network deployment period isauxiliary equipment are removed, and the 3G network deployment period is shortened. The RSU40 is vertically inserted in the cabinet.

Supports 20W/40W/60W power configurations.

R8840/RSU40 Features

Supports four carriers and smooth capacity expansion.

The R8840/RSU40 supports a maximum of four carriers. With the highly efficient power amplifier, the smooth capacity expansion from one carrier to four carriers can be achieved. Therefore, the capacity expansion demands of 3G networks can be met3G networks can be met.

The highly efficient power amplifier reduces 40% of the overall power consumption.

R8840/RSU40 Features The power amplifier unit of the R8840/RSU40 uses the highly efficient Doherty

PA and DPD linear technology developed by ZTE. The power amplifier rate h 40% Th t i l ti i 140 W d 175 W ti lreaches 40%. The typical power consumption is 140 W and 175 W respectively

when the R8840/RSU40 is in 40 W and 60 W configurations. Therefore, the OPEX of future networks can be effectively reduced.

E h R8840/RSU40 t t i i h l ( i di it ) d Each R8840/RSU40 supports two receiving channels (receive diversity) and one transmit channel. With the combined cabinets, the R8840/RSU40 supports the configuration of one single sector with four antenna receive diversities. Also, transmit diversity configuration is support by the combined cabinets. No more antenna is needed and the same sensitivity is obtainedantenna is needed and the same sensitivity is obtained.

R8840/RSU40 Features The R8840 supports flexible networking modes.

Supports the star, chain, ring, and hybrid networking modes, and four-level cascading.

The R8840 supports IP65 protection class and multiple outdoor installation pp p pscenarios.

Content







R8840

Indoor SDR Macro BTS in Dual Mode ZXSDR BS8800BS8800

RF layerRF unit configuration

portportRSU40

Cabling troughg gSupports in-cabinet cabling

PDMPower distribution

Fan moduleFan moduleHeat dissipation unit of

the RF unit

Air ventilationHeat dissipation unit of Heat dissipation unit of

the RF unit

Baseband layerBaseband unit

Baseband unit configuration port

B8200

Indoor SDR Macro BTS in Dual Mode ZXSDR BS8800

Configure the RU to the Sector configurations: Performance IndicesPerformance Indices

BS8800

Radio UnitConfigure the RU to the GSM/WCDMA mode and frequency band through software

Sector configurations:

WCDMA single mode: 24 CS GSM single mode: 36 TRX

BasebandUnit

software

Configure the BP to perform GSM/WCDMA

Baseband capacity: 960 CE

Transmit power: 60 W

Receive sensitivitypprocessing through software

Receive sensitivity

-129.2 dBm@dual antennas

Physical IndicesPhysical Indices Dimensions

950 mm x 600 mm x 450 mm Weight (full configuration)

Physical IndicesPhysical Indices

Iub interface

2 x STM-1; 16 x E1/T1; 2 x FE/GE

Interface IndicesInterface Indices

150kg Typical power consumption

425 W in S1/1/1 configuration Power supply

60 W HPA providing sufficient power and performance

40% HPA reducing power Power supply-48 V DC

40% HPA reducing power

ZXSDR BS8800 Hardware Structure

The main and auxiliary cabinets of the BS8800 are in layered design. The dimensions of the main cabinet are 950 mm x 600 mm x 450 mm (H x W x D). The auxiliary cabinet is used to expand the capacity in the GSM system. Its dimensions are 700mm x 600mm x 450mm (H x W x D).

The main cabinet is composed of the RF unit, power distribution subrack, transmission equipment subrack, fan subrack, baseband unit, and heat dissipating subrack. The auxiliary cabinet is composed of the RF unit, power distribution subrack, transmission equipment subrack, fan subrack and heat dissipating subracksubrack, and heat dissipating subrack.

Outdoor SDR Macro BTS in Dual Mode ZXSDR BS8900BS8900

Sector configurations:

WCDMA single mode: 24 CS GSMsingle mode: 36 TRX (single cabinet)

Baseband capacity: 960 CE

Transmit power:60 W

Receive sensitivity

-129.2 dBm@dual antennas Dimensions

1900 x 950 x 600mm

Weight (full configuration): 410 kg

Typical power consumption: 565 W in S1/1/1configurationconfiguration

Power supply: -48 V DC, 220 V AC

Standby batteries: 2 groups of 150 AH batteries

ZXSDR BS8900 Hardware Structure

The BS8900 can be configured flexibly with the outdoor RF cabinet, site supporting cabinet, and battery cabinet based on the actual capacity and the on-site requirement. The outdoor RF cabinet holds up to six outdoor RF units. The site support cabinet holds the power supply system and baseband pool unit. The 6U space can also hold other devices such as the transmission pequipment. The battery cabinet can hold two sets of 150 AH batteries.

Distributed BTS D-B8200

FeederFeeder

Remote optical cablep

Distributed BTS D-B8200

48 26 cm2U height Flexible deployment. Supports wall installation or 19-inch cabinet installationBBUBBU: : B8200B8200

2U

48.26 cm MicroTCAplatform

Supports GSM/UMTS and smooth development to LTE

Large capacity 960 CEs in full configuration. Supports a maximum of 12 CS and 24 CS

High data through put rate

Supports 43.2 Mbit/s downlink and 15 Mbit/s uplink concurrently for one BPCRRURRU

Distributed BTS ZXSDR D-B8200

R8840R8840 R8810R8810

4 carriers

Transmit power:

40 W/60 W

2 carriers

Transmit power:

10 W40 W/60 W

Size: 19 L

Weight: 16.5 Kg

10 W

Size: < 10 L

Weight: 9.5 Kg

The BBU of the MicroTCA architecture has high performance and develops smoothly The RRU can meetThe BBU of the MicroTCA architecture has high performance and develops smoothly. The RRU can meet different application requirements.

D-B8200 Hardware Structure

The D-B8200 is composed of the baseband unit B8200 and RRU (R8840, R8860, or R8810). The combination of B8200 and R8840 makes a macro cell distributed BTS in single mode. The combination of B8200 and R8860 makes a macro cell distributed BTS in double mode. The combination of B8200 and

R8810 makes a distributed indoor micro cell BTS.

Content





Introduction of SDR 8000 Series ProductsIntroduction of SDR 8000 Series Products

Networking of B8200 and R8840Networking of B8200 and R8840

Typical Networking Modesyp g

Chain Chain

BBURRU RRU RRU RRU

RRU BBU RRU

Star

Maximum levels of cascading: 4 Maximal transmission distance of each level:

RRU BBU

Maximal transmission distance of each level: 40 km

Total maximum transmission distance: 100 km RRU Maximum number of RRUs: 12

Indoor Distribution of B8200+RRU

ZXWR B820088.4 mm x 482.6 mm x 197 mm (H x W x D)( )

Solves the 3G space restrictionSolves the 3G space restriction

Macro BTS NodeB + RRU

ArchitectureArchitectureApplicable to scenarios with insufficient

equipment room resourceBS8800 h l b b d l

New equipment room

No equipment room

BS8800 as the large baseband poolNearby RRUs connected to the

BS8800 directly through optical cablesData transmitted to the backboneData transmitted to the backbone

network through the baseband pool

Advantages

Saves space

Backbone network

Saves spaceSaves transmission resourcesReduces feeder loss

Added optical cable

Distributed BTS

Highly improved system coverageRF

The feeder loss reduces system coverage. Th i l f 50 f d i 4 dB

RRU

RF

The gain loss of 50 m feeder is 4 dB. Similar to antennas, the use of RRUs reduces feeder loss. Gain loss of 1 dB is reduced when B8200+RRU Gain loss of 1 dB is reduced when B8200+RRU

combination is used.

Optical cable

ZXWR B8200Reducing every 3 dB gain loss on the uplink can improve 48% system coverage rate and

save 12% NodeB resources.

ZXSDR Node B Structure and Principle.pdf

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