Zxsdr bs8900 a product description 20101026

Product Type Technical Proposal

ZTE Confidential Proprietary © 2008 ZTE Corporation. All rights reserved. I

ZXSDR BS8900A Product Description


ZTE Confidential Proprietary © 2008 ZTE Corporation. All rights reserved. I


Version Date Author Approved By Remarks

V1.0 2010-10-26 Li Chunying Liang Ming Not open to the Third Party

© 2010 ZTE Corporation. All rights reserved.

ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used without the prior written permission of ZTE.

Due to update and improvement of ZTE products and technologies, information in this document is subjected to change without notice.


ZTE Confidential Proprietary © 2008 ZTE Corporation. All rights reserved. II

TABLE OF CONTENTS

1 Overview of ZXSDR BS8900A ........................................................................ 1

2 Product Features ............................................................................................ 2

3 Primary Functions .......................................................................................... 4

4 System Structure ............................................................................................ 6 4.1 System Architecture .......................................................................................... 6 4.1.1 Site Support Cabinet BC8910A ........................................................................ 6 4.1.2 Outdoor Radio Cabinet RC8910A ..................................................................... 7 4.1.3 Outdoor Radio Cabinet RC8911A ..................................................................... 7 4.1.4 Battery Cabinet PC8910A ................................................................................. 7 4.2 Typical Configuration ........................................................................................ 8 4.3 ZXSDR BS8900A Position and Interface in CDMA Network ........................... 10 4.4 Base Band Unit (BBU) .................................................................................... 11 4.4.1 Control and Clock Module (CC) ...................................................................... 12 4.4.2 Channel Handling Module (CH) ...................................................................... 13 4.4.3 Fabric Switch Module (FS) .............................................................................. 13 4.4.4 Channel Processing Voice & RF Interface Module (CVI) ................................ 13 4.4.5 Site Alarm Module (SA) .................................................................................. 14 4.4.6 Site Alarm Extender (SE) ................................................................................ 15 4.4.7 Fan Array Module (FA) ................................................................................... 15 4.4.8 Power Module (PM) ........................................................................................ 15 4.5 RF System Unit (RSU) .................................................................................... 15 4.5.1 Duplex Filter (DFL) ......................................................................................... 16 4.5.2 RRU Transceiver and Receiver (RTR) ............................................................ 17 4.5.3 Power Amplifier (PA) ...................................................................................... 18 4.5.4 RRU DC Power (RPDC) ................................................................................. 18 4.6 Battery ............................................................................................................ 19 4.7 Heat Exchanger .............................................................................................. 19 4.8 AC/DC Power Converter ................................................................................. 19

5 Technical Indices .......................................................................................... 20 5.1 Physical Indices .............................................................................................. 20 5.1.1 Dimentions ..................................................................................................... 20 5.1.2 Weight of the Whole Equipment...................................................................... 20 5.2 Power ............................................................................................................. 20 5.2.1 Power System Range ..................................................................................... 20 5.2.2 Power Consumption ....................................................................................... 20 5.3 Temperature and Humidity Requirements ...................................................... 21 5.4 Interface Indices ............................................................................................. 21 5.5 Capacity Indices ............................................................................................. 22 5.6 Environmental Classes ................................................................................... 22 5.6.1 Grade Of Protection ........................................................................................ 22 5.6.2 Grounding Requirements ................................................................................ 22 5.6.3 Noise Requirments ......................................................................................... 22


ZTE Confidential Proprietary © 2008 ZTE Corporation. All rights reserved. III

5.7 Reliability Indices ............................................................................................ 22 5.8 RF Indices ...................................................................................................... 23 5.9 BTS Clock Indices .......................................................................................... 27

6 Networking Mode and Application .............................................................. 28 6.1 Networking Mode ............................................................................................ 28 6.1.1 Abis Interface Networking Mode ..................................................................... 28 6.1.2 Baseband-RF Networking Mode ..................................................................... 29 6.2 Applications .................................................................................................... 29 6.3 Multi-Band Application .................................................................................... 30

7 Appendix A: Standards Complied ............................................................... 31

8 Appendix B: Abbreviations and Acronyms ................................................ 33


ZTE Confidential Proprietary © 2008 ZTE Corporation. All rights reserved. IV

FIGURES

Figure 4-1 BC8910A System Structure ................................................................................ 6

Figure 4-2 RC8910A System Structure ................................................................................ 7

Figure 4-3 RC8911A System Structure ................................................................................ 7

Figure 4-4 PC8910A System Structure ................................................................................ 8

Figure 4-5 ZXSDR BS8900A Typical System Configuration ................................................. 9

Figure 4-9 Position of ZXSDR BS8900A in the CDMA Mobile Communication Network..... 10

Figure 4-10 BBU Structure ................................................................................................. 11

Figure 4-11 RSU Structure ................................................................................................. 15

Figure 6-1 Abis Interface Networking Mode........................................................................ 28

Figure 6-2 Baseband-RF Networking ................................................................................. 29

Figure 6-3 Dual-band BS8900A ......................................................................................... 30

Figure 6-4 Multi-band BS8900A ......................................................................................... 30

TABLES

Table 3-1 Primary Functions of ZXSDR BS8900A ................................................................ 4

Table 5-1 Requirement Range of the Power Supply System during Normal Running Condition .............................................................................................................................. 20

Table 5-2 Normal Power Consumption with -48 V DC Power Supply ................................. 21

Table 5-3 Temperature and Humidity Requirements .......................................................... 21

Table 5-4 Interface Indices ................................................................................................. 21

Table 5-5 Transmitter indices (Band Class 0 (800MHz), Band Class 5 (450MHz)) ............. 23

Table 5-6 Transmitter indices (1.9GHz,2.1GHz and AWS) ................................................. 24

Table 5-7 Receiver indices (Band Class 0 (800MHz), Band Class 5 (450MHz)) ................. 26

Table 5-8 Receiver indices (1.9GHz,2.1GHz and AWS) ..................................................... 26

Table 8-1 Abbreviations and Acronyms .............................................................................. 33


ZTE Confidential Proprietary © 2008 ZTE Corporation. All rights reserved. 1

1 Overview of ZXSDR BS8900A

With growing competition in the telecommunication field, apart from developing new

services and attracting more subscribers, wireless operators are paying closer attention

on controlling Capital Expenditure (CAPEX) and Operation Expenditure (OPEX).

ZTE’s Software Defined Radio (SDR) platform uses the architecture in which the

baseband is separated from RF. It features high integrity, low power consumption,

flexible configuration and convenient installation & maintenance. ZTE’s new-generation

CDMA BTS is the industry’s first SDR-based CDMA BTS which can bring great

improvement to the operator’s network. ZTE’s CDMA BTS may be distributed BBU+RRU

or a macro BTS.

ZTE’s ZXSDR BS8900A is an outdoor integrated macro Base Transceiver Station (BTS)

based on ZTE’s SDR platform and is responsible for baseband modulation and

demodulation, RF signal emission and demodulation, radio resource allocation, call

processing, power control and soft handoff.

The ZXSDR BS8900A, designed on the All-IP platform, is the smallest BTS in the

industry which can support 48CS for CDMA2000 1X + 1xEV-DO services. It has

advantages such as small footprint, large capacity, support for multiple bands and

convenient upgrade and expansion. It is suitable for outdoor mid and high capacity

applications, wide coverage applications and multi-band applications.



2 Product Features

The advantages of ZTE’s ZXSDR BS8900A are:

Smaller size of ZXSDR BS8900A will save building and leasehold expense of the

equipment room

The ZXSDR BS8900A is the world’s smallest outdoor 48CS BTS with a

footprint of 0.36 m2.

Applicable to various scenarios

The ZXSDR BS8900A is applicable to mid and high capacity, wide coverage

and multi-band outdoor applications.

Easy transportation and installation will save labor and building costs.

The ZXSDR BS8900A product is small in size and light in weight, which

facilitates transport and installation.

1X and DO share the transmission resource to save the expense of renting.

Scalable architecture means more convenient capacity expansion and more

smooth migration to protect current investment.

Energy saving

Better power amplifier and less feeder cable lost will consume less electrical power

and in turn reduce the OPEX.

Abis interface over the Ethernet access technology will help to deploy the network

quickly and reduce the deployment cost.

The expense of building and renting IP network is comparatively cheaper than

E1/T1, which means lower CAPEX and OPEX in transmission for the operator.

Ethernet access can supply a larger bandwidth to meet media services (data

and video) requirements with fast development.

Compared to E1/T1, IP networking modes are flexible and expandable. It is

easy to fulfill cross-area networking and capacity expansion.

Larger capacity to minimize CAPEX



A single cabinet can support the 1X + DO channel resource of up to 48

carrier-sectors and thus minimize the CAPEX of network deployment and

future capacity expansion.

The RSU can support up to 8 carriers (which is the highest in the industry) to

maximize the expansion capability of the system.

Common BTS platform

The common BTS platform focuses on supporting future Beyond 3G (B3G) and 4G

technologies. The same hardware platform will support different technologies. The

operators can have smooth and flexible migration to the future technology in turn

protect the current network investment.

Adopts the advanced Micro Telecom Computing Architecture (uTCA)

The uTCA adopts the standard template, compact design and block

architecture, which make the operation more effective and of higher

performance-cost ratio.

The power-on management mode of uTCA is more reliable.

ZTE is the first vendor to develop a BTS based on the uTCA architecture and

takes the lead of the advanced technology in the telecommunication industry.



3 Primary Functions

The primary functions of the ZXSDR BS8900A are listed in the following 0.

Table 3-1 Primary Functions of ZXSDR BS8900A

Function Category Function Description

Basic Baseband Functions

Modulation/Demodulation (one cabinet can provide maximum 48 1X + DO carrier-sectors)

Radio resource management

Call processing

Handoff control

Power control

GPS timing and synchronization

Basic RF functions Band: 450MHz, 800 MHz, 1.9GHz,2.1GHz,AWS

RF modulation/demodulation

RF transceiver duplexer

Low noise amplification for received RF signal

Amplification for transmitted RF signal

RF transceiver

Interfaces The baseband-RF interface supports Common Public Radio Interface (CPRI) protocol.

The Abis interface supports IP Over Ethernet access.

The Abis interface supports IP Over E1/T1 access.

The air interface conforms to IS-2000 Release A and IS-856-A.

Networking Supports the remote application of RRU.

Supports star and chain networking modes.

Supports the cascaded networking mode of RSU/RRU up to 6 levels.

Supports cabinet combination to implement the RF extension application (diversity output/input).

Supports cascaded BBUs.

The Abis interface supports the daisy chain access by IP Over E1/T1.

Environment monitoring

Input power undervoltage/overvoltage alarm

Output power undervoltage/overvoltage alarm

Power overcurrent alarm

Environment temperature alarm

External RS232/RS485 monitoring interfaces

Equipment Support for front-maintenance



Function Category Function Description

maintenance Remote upgrade of software version for FPGA/BOOT/DSP/CPU

Remote boards reset and power-off

Electronic label

Power query: baseband power, RF power, power at antenna port

Automatic calibration

RSSI query

Reverse spectrum query: querying the reverse received signal spectrum of each carrier

Monitoring alarm for antenna standing wave ratio

Power amplification control and protection: over-power, over-temperature and standing wave alarm

Reliability Reverse voltage protection

Application Mode Dense traffic cities and suburbs



4 System Structure

4.1 System Architecture

The ZXSDR BS8900A is designed on the basis of the SDR platform, and provided with

forward-looking and competitiveness. ZXSDR BS8900A is one outdoor macro base

station with built-in BBU, RSU, power supply, battery and transmission.

ZXSDR BS8900A is compatible with all functions of ZXSDR BBU+RRU. It is added with

built-in power (AC to DC), batteries, transmission and E1 wiring space inside the rack,

integrating the functions of main equipment site, transmission, power and batteries.

BS8900A adopts standard 19 inches rack structure. It is composed of site support

cabinet BC8910A, outdoor radio cabinet RC8910A, outdoor radio cabinet RC8911A, and

battery cabinet PC8910A.The cabinet dimension is 800mm * 600mm * 600mm (H*W*D).

Front wiring design enables installation against wall and convenient maintenance. The

sub racks of BS8900A can be combined flexibly to cater for different scenarios.

4.1.1 Site Support Cabinet BC8910A

There are mainly five parts in BC8910A: baseband unit, built-in power, heat exchanging

system and space for transmission or other equipments. Together with the fan and

ventilation vessel, the heat exchanger, located in the cabinet door, makes the heat

exchanging system. The heat exchanger is the heat dissipation and heating device. The

power supply is used to convert AC to DC and also charge the cabinet. BC8910A

architecture is shown in the following figure.

Figure 4-1 BC8910A System Structure

Lightning Protection

B8200

Fan and Ventilation Vessel

AC/DC Power Distribution

AC/DCPower Supply

Cable Chute

Heater

Reserved space (for transmission, etc.)

Heat Exchanger

Lightning Protection



4.1.2 Outdoor Radio Cabinet RC8910A

Single RC8910A cabinet consists of 6 RSUs and realizes the radiation through the

compulsion forced-air cooling.

The cabinet can provide the functions of the lightning protection and environmental

monitoring, mainly suitable multiply carrier-sectors applications.

Figure 4-2 RC8910A System Structure

Radio ModuleRSU82

FAN

Power Distribution Module

4.1.3 Outdoor Radio Cabinet RC8911A

RC8911A accommodates 3 RF modules, a battery set and fan control subsystem.

RC8911A can be divided into left and right part. In the right part 3 RSUs can be installed,

and in the left part a battery set can be installed. The capacity of a battery set is

150AH/90AH.

Figure 4-3 RC8911A System Structure

Power Distribution Module

FAN

Radio ModuleRSU

Battery

4.1.4 Battery Cabinet PC8910A

PC8910A is outdoor battery cabinet, there are two kinds:



PC8910A (Direct ventilation): It adopts the design of direct ventilation cooling to

ensure the temperature below 10 degrees between the inside cabinet and outside

the cabinet, and the cabinet can be installed 2 group batteries with the capacity of

2*135AH (or 2*90AH).

PC8910A (TEC): It adopts the design of thermal electric cooler (TEC) to ensure the

temperature below 15 degrees between the inside cabinet and outside the cabinet,

and the cabinet can be installed 2 group batteries with the capacity of 2*135AH (or

2*90AH).

Figure 4-4 PC8910A System Structure

Battery

4.2 Typical Configuration

ZXSDR BS8900A has the advantage of flexible networking. According to outdoor

applications, BC8910A can be used with RC8910A, PC8910A, or RC8911A, and can

also be used with RRU as an outdoor installation cabinet of BBU. BS8900A can be

achieved as shown in the following four system configuration.



Figure 4-5 ZXSDR BS8900A Typical System Configuration

BC8910A

RC8910A PC8910A

BC8910A

RC8911A

RC8910ADC

Power

Typical Configuration 1

PC8910A

BC8910A RRU

CPRI

DC

Power

BC8910A

Typical Configuration 2

Typical Configuration 3 Typical Configuration 4

Typical configuration 1:

The ZXSDR BS8900A can be configured with one site support cabinet (BC8910A), one

outdoor radio cabinet (RC8910A) and one battery cabinet (PC8910A). Build-in power in

the BC8910A provides the power supply and backup power for the BBU and RC8910A.

The configuration structure can provide: 1 BBU +6 RSU +270AH batteries + 5U space

reserved.


The ZXSDR BS8900A can be configured with one site support cabinet (BC8910A) and

one radio cabinet (RC8911A), and the radio cabinet supports three RSUs and and a set

of batteries.

The configuration structure can provide: 1 BBU + 3 RSU + 135 AH batteries + 5U space

reserved.


In the BBU + RRU outdoor scenes, BC8910A used as an outdoor installation cabinet is

piled up with PC8910A, which can realize the outdoor application of BBU, and can

provide power supply and backup power for RRU.

The configuration structure can provide: 1 BBU + 270 AH batteries + 5U space reserved.




In case of the customer can provide power supply and batteries, The ZXSDR BS8900A

can be configured with one site support cabinet (BC8910A) and one radio cabinet

(RC8910A).

The configuration structure can provide: 1 BBU + 6 RSU + 8U space reserved.

4.3 ZXSDR BS8900A Position and Interface in CDMA Network

Figure 4-10 shows the position of ZXSDR BS8900A in the CDMA mobile communication

network.

Figure 4-6 Position of ZXSDR BS8900A in the CDMA Mobile Communication Network

...

BS8900A

BS

C

MS

MS

MS

BSC

RRU

MS

MS

MS BBU

RRU

BBU

MS

C

AGW

/ PDSN

BS

C

Um

Air interface

Baseband-RF

interface

CPRI

Abis interfaceA3/A7 interface

A

MS

C

MSC

MGW

PCF

BSC

PCF

A8/A9 interface

RRURRU

RRURSU

RRURSU

BS8900A

The ZXSDR BS8900A is a macro BTS integrating the BBU and the RSU. It implements

the radio transmission over the CDMA2000 air interface between itself and the MS

within its coverage, controls radio channels, and communicates with the BSC.

The ZXSDR BS8900A has the following interfaces:

Abis interface

The ZXSDR BS8900A communicates with the BSC through the Abis interface. The

Abis interface is an internal interface and supports two kinds of interface modes:



Interface based on IP Over E1/T1, implemented through standard CUDP,

PPPMUX, MP and HDLC protocol stacks

Interface based on IP Over Ethernet

Um interface

Um interface is used between the Access Terminal (AT) and the ZXSDR BS8900A

and conforms to the standards IS-2000 Release A and IS-856-A.

4.4 Base Band Unit (BBU)

Figure 4-7 BBU Structure

Transmission

E1/T1

BSC

RRU

Base Switch

(Giga Ethernet Switch)

Shelf Management Module (shMM)

CHMCHM

CHMCHM

CHSA

CC

GPS

GPS

CPRI

ABIS

FSFabric switch

(IQ Switch)

GE

BBU

Ethernet SwitchFS

The BBU consists of the following modules:

Control and Clock Module (CC)

Channel Handling Module (CH)

Fabric Switch Module (FS)



Channel Processing Voice & RF Interface Module (CVI)

Site Alarm Module (SA)

Site Alarm Extender (SE)

Fan Array Module (FA)

Power Module (PM)

The intra-BBU signal flow is shown as follows:

Forward signal flow: The data from the BSC goes into the BBU through the CC.

The CC terminates IP transmission protocol over Abis interface and then sends the

data to CH via Gigabit Ethernet (GE). The CH implements CDMA modulation and

then multiplexes the modulated data, and sends the data to the FS for I/Q switching.

After demultiplexing, framing and parallel to serial conversion, the data is sent to

RSUs via CPRI interface.

Reverse signal flow: The FS receives the signal from the RSU, and then de-

multiplexes and sends it to the CH board. The CH performs CDMA demodulation

and gets service messages. The CH packages the messages into Ethernet frames

and sends the frames to the CC via GE. The CC performs IP transmission protocol

processing over the Abis interface, and then sends the data to the BSC through

E1/T1. The BTS also provides IP-Ethernet access mode.

4.4.1 Control and Clock Module (CC)

The CC has the following functions of:

GPS timing

Receiving GPS signal and providing system clock and RF reference clock

Distributing system clock signal

GE Ethernet switching

External interfaces

Abis interface: 1 Ethernet port (optic or RJ45 port)

One local operation and maintenance interface - FE port

Active/standby working mode



4.4.2 Channel Handling Module (CH)

The CH mainly implements baseband forward modulation and reverse demodulation,

and key technologies of CDMA like diversity technology, RAKE receiver, softer handoff

and power control.

The CH includes CHV (based on CSM6700 chip) and CHD (based on CSM6800 chip).

CHV supports CDMA2000 1X and CHD supports 1x EV-DO.

The ZXSDR BS8900A system supports interchangeable installation of CHD and CHV to

implement both 1x and EV-DO services.

The CH module performs forward modulation and reverse demodulation of baseband

and supports the following physical channels:

Forward: pilot channel, synchrnization channel, paging channel, quick paging

channel, forward dedicated control channel, forward fundmental channel, forward

supplemental channel and forward supplemental code channel

Reverse: reverse pilot channel, access channel, reverse fundmental channel,

reverse supplemental channel and reverse dedicated control channel.

Note: It is necessary to configure CHs only when the system capacity exceeds 2C3S.

4.4.3 Fabric Switch Module (FS)

The FS has the following functions of:

Baseband-RF interface

Six CPRI interfaces

Forward signal flow: The FS multiplexes and frames the baseband data, and

sends it to RSU via optic port.

Reverse signal flow: The FS de-frames and de-multiplexes the data from RSU

and then sends the data to the BBU.

IQ switching

Load-sharing working mode

4.4.4 Channel Processing Voice & RF Interface Module (CVI)

The Channel Processing Voice & RF Interface Module (CVI) implements the following

functions:



Remote baseband-RF CPRI interface

Support four remote baseband-RF CPRI interfaces

Forward: the CVI multiplexes and frames the baseband data and then connects to the RRU through an optical interface.

Reverse: The CVI performs deframing and demultiplexing of the data from the RRU and then sends it to the BBU.

IQ switching

The CVI supports IQ switching with other channel boards in other AMC slots to

implement channel sharing.

1X channel processing

Implement a variety of key technologies: diversity, RAKE receiver, softer handoff and power control.

Implement forward modulation and reverse demodulation of baseband signal.

Forward modulation and reverse demodulation support the following physical

channels:

Forward: Pilot Channel, Sync Channel, Paging Channel, Quick Paging channel, Dedicated Control Channel, Forward Foundmental Channel, Forward Supplemental Channel and Forward Supplemental Code Channel

Reverse: Reverse Pilot Channel, Access Channel, Reverse Foundmental Channel, Reverse Supplemental Channel and Reverse Dedicated Control Channel.

Note: The CVI with optical fiber interfaces integrates functions of CHV and FS. In a BBU,

FS and CVI are mutually exclusive

4.4.5 Site Alarm Module (SA)

The site alarm module (SA) has the following functions of:

Fan speed control and alarm information

Monitoring interfaces

External RS485/RS232 environment monitoring ports

Dry contacts: 8 inputs; or 6 inputs and 2 outputs

ABIS interface: 8-16 E1/T1 interfaces



4.4.6 Site Alarm Extender (SE)

Site alarm extender (SE) has the following functions:

Monitoring interfaces

External RS485/RS232 environment monitoring ports.

Dry contacts: 8 inputs; or 6 inputs and 2 outputs.

Abis interface: up to 8-16 E1s/T1s

4.4.7 Fan Array Module (FA)

The FA provides fan speed control and temperature detection for the air inlet.

4.4.8 Power Module (PM)

The PM is the power module in the BBU, processing and distributing the input

secondary power supply of -48 V DC.

4.5 RF System Unit (RSU)

The RSU60 (1T2R) or RSU82 (2T4R) can be used as the RF functional entity.

As the first double-density module in CDMA field, RSU82 can be mounted in such

system models as BS8906E, BS8800, and BS8900A. It can be applied in double-sector

1T2R, single-sector high carrier, high power and dual band, etc. Its hardware supports

LTE, and software upgrade can achieve CDMA/LTE mixed mode.

The RSU consists of four parts as shown in the following figure :

Duplex Filter (DFL)

RRU Transmitter and Receiver (RTR)

Power Amplifier (PA)

RRU DC Power (RPDC)

Figure 4-8 RSU Structure



PA

RTR

TXRX 0

Fiber to BBU

DFL

ant1 ant0

RX1

The signal flow of the RSU is shown in Figure 4 and described as follows:

Forward signal flow: The RTR receives the data after baseband modulation via the

CPRI interface, performs up conversion of the data, and then sends the data to the

PA. The PA amplifies the power of the input signal from the TR and then sends it to

the DFL. The DFL processes the RF signal and then sends it via the antenna.

Reverse signal flow: The reverse CDMA signal from the antenna is sent to the RTR

after through the DFL. Then the CDMA signal is converted to a baseband digital

signal by the TR and sent to the baseband via the CPRI interface.

To support combined cabinets, one Rx out and one Rx in ports are reserved on the RSU.

4.5.1 Duplex Filter (DFL)

The DFL has the following functions:

Filters the reverse CDMA signals received by the antenna and then performs lower

noise amplification using a Low Noise Amplifier (LNA).

Filters the forward RF signal to be delivered.

Reports LNA alarms to the RTR.

In the case of main/diversity combined cabinets, the main receive LNA of the DFL

supports two channels of output signals and reserves an external port (Rx out).

The built-in antenna lightning arrestor can meet the lightning requirement of the

BTS in practice.



4.5.2 RRU Transceiver and Receiver (RTR)

The RTR is the main control module in the RSU. It implements communication, control,

alarm and version management for the RSU.

The RTR has the following functions of:

Forward link processing

Conversion from baseband signal to RF signal

Conversion of output IQ data format

Power calibration and detection processing

Peak clipping/digital pre-distortion processing

Digital Intermediate Frequency (IF) processing

Gain adjustment (calibration)

Reverse link processing

Conversion from RF signal to baseband signal

Digital IF processing

RSSI and RAB report

Inband anti-interference function

Spectrum report

Automatic Gain Control (AGC) function

Output IQ data format conversion function

Supports switching between different receive channel signals in the case of

main/diversity combined cabinets

Clock processing function

The RTR performs clock recovery for data on the CPRI interface, generates a

reference clock source, and performs phase lock for the reference clock by utilizing

a local high-stability clock. The working clocks generated include the master clock,

frame-frequency clock, digital processing clock and RF baseband clock.

Monitoring function



PA forward power detection function: When the temperature threshold is

exceeded, the RTR reports the relevant alarm and controls the PA through the

PA output enable/disable signal.

PA reversed power (standing wave ratio) detection function: When the

temperature threshold of the standing wave ratio is exceeded, the RTR

reports the relevant alarm and controls the PA through the PA output

enable/disable signal.

PA temperature detection function: When the temperature threshold is

exceeded, the RTR reports the relevant alarm and controls the PA through the

PA output enable/disable signal.

PA output enable/disable

RTR transmit output power detection

DFL two-channel LNA alarm detection and report

RPDC input undervoltage/overvoltage alarm detection and report

RPDC output undervoltage/overvoltage alarm detection and report

RPDC output overcurrent alarm detection and report

System environment monitoring

CPRI optical interface self-test alarm

Key chip self-test alarm

4.5.3 Power Amplifier (PA)

The PA has the following functions:

Amplifies the Down Link (DL) RF signals from the RTR and then outputs the signal

to the DFL.

Provides digital pre-distortion feedback signal to the RTR.

Provides the PA output enable/disable interface.

4.5.4 RRU DC Power (RPDC)

The RPDC converts -48 V DC to other DC power level required by the PA, RTR and

DFL modules.



4.6 Battery

Each group has a capacity of 150AH/90AH.

4.7 Heat Exchanger

The heat exchanger decides whether to provide heating function according to the

indices of the temperature sensor, and thus keeps the operating temperature stable and

ensures the normal running of the devices inside the cabinet.

4.8 AC/DC Power Converter

The AC/DC power converter is used to convert AC to DC.

Input voltage: 220 V AC, in the range of 150-300 V

Output voltage range: from -62V DC to -18 V DC



5 Technical Indices

5.1 Physical Indices

5.1.1 Dimentions

Dimensions of site support cabinet (H x W x D): 800 mm x 600 mm x 600 mm

Dimensions of radio cabinet (H x W x D): 850 mm x 600 mm x 600 mm

Dimensions of battery cabinet (H x W x D): 800 mm x 600 mm x 600 mm

5.1.2 Weight of the Whole Equipment

Weight: < =260 kg (for three sectors, AC power, no battery)

Weight: <= 300 kg (for six sectors, AC power, no battery)

5.2 Power

5.2.1 Power System Range

Table 5-1 lists the requirements of the power supply system during normal running

condition.

Table 5-1 Requirement Range of the Power Supply System during Normal Running Condition

SN Nominal Value Voltage Fluctuation

1 220 V AC 150 V to 300 V

2 -48 V DC -18 V to -62V

5.2.2 Power Consumption

The normal power consumption with -48 V DC power supply is shown in the following

table.



Table 5-2 Normal Power Consumption with -48 V DC Power Supply

Typical Configuration power Typical Power Consumption

S111 20W/C/S 430 W

S222 20W/C/S 600 W

S333 20W/C/S 780 W

S444 20W/C/S 960 W

S555 20W/C/S 1240 W

S666 20W/C/S 1410 W

S777 20W/C/S 1590 W

S888 20W/C/S 1770 W

Notes :

The above power consumption values are under the 800 MHz band; for -48V DC

power input, adopt the power consumption of the latest power amplification module.

For the base stations of different frequency band and different configuration, the

power consumption is diversified.

5.3 Temperature and Humidity Requirements

Table 5-3 Temperature and Humidity Requirements

Item Requirement

Operating temperature range -40C to +55C (-40ºF to +131ºF)

Operating humidity range 5%RH to 95%RH

5.4 Interface Indices

Table 5-4 Interface Indices

Item Description Index

Abis interface E1/T1 8-16

Number of Ethernet interface 1 (optical or RJ45 port)

Levels of E1/T1 daisy chain 8

Baseband-RF interface

Number of FSs supported by a single baseband

2

Number of optical ports supported by a single FS/CVI

6/4

Interface protocol between BBU and RRU/RSU

CPRI



Item Description Index

Medium for BBU and RRU/RSU interface

Optical port/high-speed cable interface

Max. number of RRU /RSUs supported by a single BBU

32

Length of a single fabric link supported by an RSU

< 80 km

Environment Monitoring Interface

Dry contact Each RSU supports four dry contacts: four inputs.

Each BBU supports eight dry contacts: eight line inputs or six line inputs and two line outputs.

Serial port One RS-485/RS-232

5.5 Capacity Indices

A single cabinet can support at most 48 carrier-sectors (16C3S or 8C6S).

The maximum capacity of cascaded RF cabinets is 32C3S/16C6S.

26.38 Erl per sector/carrier.

5.6 Environmental Classes

5.6.1 Grade Of Protection

IP55

5.6.2 Grounding Requirements

Joint grounding resistance 1; BTS grounding resistance 5 .

5.6.3 Noise Requirments

BTS working environmental noise: < 65 dBA.

5.7 Reliability Indices

Mean Time Between Failure (MTBF): > 100,000 hours.



Availability: > 99.999%.

5.8 RF Indices

The RF indices of ZXSDR BS8900A conform to 3GPP2 C.S0010-C, Recommended

Minimum Performance Standards for cdma2000 Spread Spectrum Base Station and

3GPP2 C.S0032-A, Recommended Minimum Performance Standards for CDMA2000

High Rate Packet Data Access Network.

Transmitter indices (Band Class 0 (800MHz), Band Class 5 (450MHz))

Table 5-5 Transmitter indices (Band Class 0 (800MHz), Band Class 5 (450MHz))

Name Index

Operating band 800MHz (Band Class 0)

450MHz (Band Class 5)

TransMHzitter output frequency tolerance

±0.05 ppm

Occupied channel bandwidth

1.23 MHz (Band Class 0)

1.25 MHz (Band Class 5)

Output power at the Top of Cabinet (TOC)

40W/60W/80W/105W (800MHz)

60W (450MHz)

Total transmit power The total transmit power is within +2 dB and -4 dB of the manufacturer’s rated power.

Modulation mode Quadrature amplitude modulation

Conducted spurious emission and radiated spurious emission suppression

-45 dBc @750 kHz offset Center Freq (RBW 30 kHz)

-60 dBc @1.98 MHz offset Center Freq (RBW 30 kHz)

> 4 MHz OFFSET:

-36 dBm (RBW 1 kHz) @ 9 kHz < f <150 kHz

< -36 dBm (RBW 10 kHz) @ 150 kHz < f < 30 MHz

<-30 dBm (RBW 1 MHz) @ 1 GHz < f < 12.5 GHz

4-6.4 MHz OFFSET:

< -36 dBm (RBW 1 kHz) @ 30 MHz < f < 1 GHz

6.4M TO 16M OFFSET:

< -36 dBm (RBW 10 kHz) @ 30 MHz < f < 1GHz

> 16 MHz OFFSET:

< -36 dBm (RBW 100 kHz) @ 30 MHz < f < 1 GHz

Transmitter intermodulation performance

If one BTS transmits at the rated power but another BTS’ output power is 30 dB less than the former’s rated power. When the powers of two BTSs are combined on the antenna port, the generated intermodulation spurious emission meets the conducted spurious emission requirement. The IF



Name Index

difference of the transmit signals of two BTSs is 1.25M.

Pilot time tolerance The PN time tolerance falls within 3 us and the inter-carrier tolerance falls within 1 us.

Time Tolerance/phase tolerance of pilot channel to other channels

Time difference: < 50 ns

Phase difference: < 0.05 rad

Waveform quality Rho is greater than 0.970 dBm with configuration of a single pilot.

Pilot code domain power With the standard 9CH configuration, the pilot code domain power is in the range of -7.0±0.5 dB.

Inactive channel code domain power

With the standard 9CH configuration, the inactive channel code domain power is less than -27 dB.

DO MAC inactive channel code domain power

With configuration of 13 FLUSs, the MAC inactive channel code domain power is less than -29.5 dB (type 2).

DO DATA channel code domain power

With configuration of 13 FLUSs at the rate of 614.44 kbs (test 1), the DATA channel code domain power is in the range of -15.5 dB to -14.5 dB.

Wave quality of DO channels

Pilot channel: Rho > 0.97

MAC channel: Rho > 0.912

DATA channel: Rho > 0.97

Standing wave ratio of the RFE

1.50

Transmitter indices (1.9GHz,2.1GHz and AWS)

Table 5-6 Transmitter indices (1.9GHz,2.1GHz and AWS)

Name Index

Operating band 1.9GHz (Band Class 1)

2.1GHz (Band Class 6)

AWS (Band Class 15)

Transmitter output frequency tolerance

±0.05 ppm

Occupied channel bandwidth

1.25 MHz

Output power at the Top of Cabinet (TOC)

60W/80W(1.9GHz)

60W(2.1GHz)

60W(AWS)

Total transmit power The total transmit power is within +2 dB and -2 dB of the manufacturer’s rated power.

Modulation mode Quadrature amplitude modulation



Name Index

Conducted spurious emission and radiated spurious emission suppression

-45dBc @885 kHz offset Center Freq (RBW 30kHz)

-55 dBc @1.98 MHz offset Center Freq (RBW 30kHz)

> 4 MHz OFFSET:

-36 dBm (RBW 1kHz) @ 9KHz < f <150 kHz

< -36 dBm (RBW 10kHz) @ 150 kHz < f < 30 MHz

< -36 dBm (RBW 100kHz) @ 30 MHz <f < 1 GHz

4-16 MHz OFFSET:

< -30 dBm (RBW 30kHz) @ 1 GHz < f < 12.5 GHz

16M-19.2M OFFSET:

<-30dBm(RBW 300kHz) @ 1GHz<f< 12.5GHz

>19.2MHz OFFSET:

<-30dBm(RBW 1MHz) @ 1GHz<f< 12.5GHz

Transmitter intermodulation performance

If one BTS transmits at the rated power but another BTS’ output power is 30 dB less than the former’s rated power. When the powers of two BTSs are combined on the antenna port, the generated intermodulation spurious emission meets the conducted spurious emission requirement. The IF difference of the transmit signals of two BTSs is 1.25M.

Pilot time tolerance The PN time tolerance falls within 3 us and the inter-carrier tolerance falls within 1 us.

Time Tolerance/phase tolerance of pilot channel to other channels

Time difference: < 50 ns

Phase difference: < 0.05 rad

Waveform quality Rho is greater than 0.990 dBm with configuration of a single pilot.

Pilot code domain power With the standard 9CH configuration, the pilot code domain power is in the range of -7.0±0.5 dB.

Inactive channel code domain power

With the standard 9CH configuration, the inactive channel code domain power is less than -27 dB.

DO MAC inactive channel code domain power

With configuration of 13 FLUSs, the MAC inactive channel code domain power is less than -29.5 dB (type 2).

DO DATA channel code domain power

With configuration of 13 FLUSs at the rate of 614.44 kbs (test 1), the DATA channel code domain power is in the range of -15.5 dB to -14.5 dB.

Wave quality of DO channels

Pilot channel: Rho > 0.97

MAC channel: Rho > 0.912

DATA channel: Rho > 0.97


1.50



Receiver indices (Band Class 0 (800MHz), Band Class 5 (450MHz))

Table 5-7 Receiver indices (Band Class 0 (800MHz), Band Class 5 (450MHz))

Name Index

Operating band 800MHz (Band Class 0)

450MHz (Band Class 5)

Receiver sensitivity < -130 dBm

Receiver dynamic range When the lower limit is the receiver sensitivity and the upper limit (noise level) equals -65dBm/1.23MHz

(Eb/N0 = 10dB1dB), the Frame Error Rate (FER) is lower than 1%.

Noise figure < 3

Single tone desensitization In the presence of a single tone that is 50 dB above

the CDMA signal level, and is at offset of 750 kHz from the center frequency, the output power of the MS increases by no more than 3 dB ,and the FER is less than 1.5%.

In the presence of a single tone that is 87 dB above

the CDMA signal level, and is at offset of 900 kHz from the center frequency, the output power of the MS increases by no more than 3 dB, and the FER is less than 1.5%.

Intermodulation spurious response attenuation

BAND 0:

In the presence of two interfering tones that are 72 dB above the CDMA signal level, and are at offsets of +900 kHz and +1.7 MHz, and -900 kHz and -1.7 MHz from the center frequency, the output power of the MS increases by no more than 3 dB, and the FER is less than 1.5%.

Conducted spurious emissions and radiated spurious emissions

< -80 dBm, measured within the BTS receive band

< -60 dBm, measured within the base station transmit band


1.50

Receiver indices (1.9GHz,2.1GHz and AWS)

Table 5-8 Receiver indices (1.9GHz,2.1GHz and AWS)

Name Index

Operating band 1.9GHz (Band Class 1)

2.1GHz (Band Class 6)

AWS (Band Class 15)

Receiver sensitivity < -130 dBm

Receiver dynamic range When the lower limit is the receiver sensitivity and the upper limit (noise level) equals -65dBm/1.23MHz

(Eb/N0 = 10dB1dB), the Frame Error Rate (FER) is



Name Index

lower than 1%.

Noise figure < 3

Adjacent Channel Selectivity

Band Class 6:>-53dBm(±2.5M)

Single tone desensitization In the presence of a single tone that is 50 dB above

the CDMA signal level, and is at offset of 750 kHz from the center frequency, the output power of the MS increases by no more than 3 dB ,and the FER is less than 1.5%.

In the presence of a single tone that is 87 dB above

the CDMA signal level, and is at offset of 900 kHz from the center frequency, the output power of the MS increases by no more than 3 dB, and the FER is less than 1.5%.

Intermodulation spurious response attenuation

In the presence of two interfering tones that are 70dB above the CDMA signal level, and are at offsets of

+1.25M Hz and +2.05M Hz, and -1.25 MHz and -2.05 MHz from the center frequency of the edge carrier, the

output power of the mobile station shall increase by no

more than 3 dB, and the FER shall be less than 1.5%.

Conducted spurious emissions and radiated spurious emissions

< -80 dBm, measured within the BTS receive band

< -60 dBm, measured within the base station transmit band


1.50

5.9 BTS Clock Indices

1 BTS clock indices

Frequency reference: 10 MHz. Its accuracy should be smaller than 10-10

in the

locked GPS status or the holdover status.

Temperature: < ±0.5 x 10-9

2 Clock synchronous source

Once the synchronous source is lost for a while or the BTS clock is lost in

synchronization, dual-ovenized crystal is adopted to ensure the stability of clock for

a short period, and this guarantees that phase wander is less than 10 µs within 24

hours through the HOLDOVER algorithm. Therefore the BTS can run normally.

3 Clock system performance

Frequency tolerance < 0.05 ppm

Phase difference < 10 us



6 Networking Mode and Application

6.1 Networking Mode

6.1.1 Abis Interface Networking Mode

ZTE BSC and ZXSDR BS8900A are connected through Abis interface, physically which

can be E1/T1 or Ethernet. Abis interface networking mode is shown in the following

figure.

Figure 6-1 Abis Interface Networking Mode

IP

BSCBSC

...

...

AbisE1/T1

Abis Star

Abis Chain

...

IP

BS8900A

Ethernet based Abis

BS8900A

BS8900A

BS8900A BS8900A BS8900A

BS8900A

When the BSC is connected with BS8900As through E1/T1, and the networking

mode can be star or chain.

Star network: Each BS8900A is connected to the BSC directly (by E1/T1) or

indirectly (by external transmission equipment). It is simple and reliable.

Chain network: Several BS8900As are connected in a chain and the last

BS8900A is connected to BSC directly. It is suitable for zonary area.

The combination of star and chain networking modes can be used between

the BS8900A and the BSC.

When the BSC is connected with BS8900As through GE ports, which provides

many flexible networking modes for customers:

The BSC is connected with the BS8900As through network cables.



BSC is connected with the BS8900As through Hub or Switch.

The BSC is connected with several BS8900As through routers.

6.1.2 Baseband-RF Networking Mode

The baseband-RF interface of ZXSDR BS8900A supports CPRI protocol. BBU and RSU

are interconnected through a fiber, so are the BBU and other RRU. Star and chain

networking modes are supported:

Star network: The fiber number from baseband equals to the total number of radio

stations. The number of fibers may be high and the reliability also is high.

Chain network: There are fewer fibers in a chain network than in a star network, but

the reliability in the chain network is lower.

Figure 6-2 Baseband-RF Networking

PM

PM

SA CHCC

CC CH

CH

CHFS

FS

R

S

U

R

S

U

R

S

U

R

S

U

R

S

U

R

S

U

RRU RRU

ZXSDR BS8900A

BBU

Fiber

6.2 Applications

The ZXSDR BS8900A features flexible installation and wide applications due to large

capacity and small size.

Suitable for outdoor mid and high capacity, wide coverage and multi-band

applications:

It is the smallest outdoor 48CS BTS in the industry with the footprint of 0.36

m2.



The RSU supports a larger number of carriers and has a higher expansion

capability. It supports at most eight carriers, which is the largest number in the

industry.

The ZXSDR BS8900A supports multi-band.

6.3 Multi-Band Application

All the ZXSDR BS8900A RF links are independent from each other. Each RSU can

operate in a different band to share the baseband resource. The ZXSDR BS8900A

supports sharing of up to S888 + S888 baseband resources.

Figure 6-3 Dual-band BS8900A

Sharing of antenna feeder

BBU

RSU

RSU

RSU

RSU

RSU

RSU

For Band B

For Band A

For Common

The ZXSDR BS8900A supports at most six bands, as shown in the following figure.

Figure 6-4 Multi-band BS8900A

BBU

R

S

U

R

S

U

R

S

U

R

S

U

R

S

U

R

S

U

For Band F

For Band E

For Common

For Band D

For Band C

For Band B

For Band ASec 1 Sec 2 Sec 5Sec 3 Sec 6Sec 4

Through external RRUs and cascading of RRUs, the ZXSDR BS8900A can support

more bands. The number of bands supported by the system is only limited by the

baseband resource.



7 Appendix A: Standards Complied ANSI J-STD-008, Personal Station-Base Station Compatibility Requirement for 1.8

to 2.0 GHz Code Division Multiple Access (CDMA) Personal Communications

System, 1996.

3GPP2 C.S0001-A version 5.0: Introduction to CDMA2000 Standards for Spread

Spectrum Systems - Release A.

3GPP2 C.S0002-A version 6.0 (TIA/EIA IS-2000.2-A-2): Physical Layer Standard

for CDMA2000 Spread Spectrum Systems - Release A.

3GPP2 C.S0003-A version 6.0 (TIA/EIA IS-2000.3-A-2): Medium Access Control

(MAC) Standard for CDMA2000 Spread Spectrum Systems - Release A,

Addendum 2.

3GPP2 C.S0004-A version 6.0 (TIA/EIA IS-2000.4-A-2): Signaling Link Access

Control (LAC) Specification for CDMA2000 Spread Spectrum Systems - Release A.

3GPP2 C.S0005-A version 6.0 (TIA/EIA IS-2000.5-A-2): Upper Layer (Layer 3)

Signaling Standard for CDMA2000 Spread Spectrum Systems - Release A,

Addendum 2.

TIA/EIA/TSB-58, Administration Parameter Value Assignments for TIA/EIA

Wideband Spread Spectrum Standards, 1995.

TIA/EIA/TSB-74, Support for 14.4 Kbps Data Rate and PCS Interaction for

Wideband Spread Spectrum Cellular System, 1995.

TIA/EIA/IS-95-A, Mobile Station-Base Station Compatibility Standard for Dual-Mode

Wideband Spread Spectrum Cellular Systems.

TIA/EIA/IS-95, Mobile Station-Base Station Compatibility Standard for Dual-Mode

Wideband Spread Spectrum Cellular Systems.

TIA/EIA/IS-637, Short Message Services for Wideband Spread Spectrum Cellular

Systems, 1997.

TIA/EIA/IS-127, Enhanced Variable Rate Codec Speech Service Option 3 for

Wideband Spread Spectrum Digital Systems, 1996.

TIA/EIA/IS-658, Data Service Interworking Function Interface for Wideband Spread

Spectrum Systems.

CDG RF36, Markov Service Option for Wideband Spread Spectrum

Communications Systems.

TIA/EIA/IS-725, Over-the-Air Service Provisioning of Mobile Stations in Wideband

Spread Spectrum Systems, 1997.

TIA/EIA/IS-728, Inter-System Link Protocol.

TIA/EIA/IS-733, High Rate Speech Service Option 17 for Wideband Spread

Spectrum Communication Systems.

TIA/EIA/IS-707, Data Service Options for Wideband Spread Spectrum Systems,

1998.



TIA/EIA/IS-707-A-2 Data Service Options for Spread Spectrum Systems

Addendum 2, 2000.

3GPP2 C.S0024-A (TIA/EIA IS-856-A): CDMA2000 High Rate Packet Data Air

Interface Specification, August 2005.

3GPP2 C.S0024 (TIA/EIA IS-856): CDMA2000 High Rate Packet Data Air Interface

Specification, October 2002.

3GPP2 C.S0024-B (TIA/EIA IS-856-B): cdma2000 High Rate Packet Data Air

Interface Specification

3GPP2 A.S0008 (TIA/EIA IS-878), IOS Specification for High Rate Packet Data

(HRPD) Radio Access Network Interfaces.

3GPP2 A.S0008-A. Interoperability Specification (IOS) for High Rate Packet Data

(HRPD) Radio Access Network Interfaces With Session Control in the Access

Network

3GPP2 C.S0063-0, cdma2000 High Rate Packet Data Supplemental Services.

3GPP2 C.S0063-A, cdma2000 High Rate Packet Data Supplemental Services.



8 Appendix B: Abbreviations and Acronyms

Table 8-1 Abbreviations and Acronyms

AGC Automatic Gain Control

AT Access Terminal

B3G Beyond 3G

BBU Base Band Unit

BSC Base Station Controller

BTS Base Transceiver Station

CAPEX Capital Expenditure

CC Control and Clock Module

CH Channel Handling Module

CPRI Common Public Radio Interface

CVI Channel Processing Voice Interface Module

DFL Duplex Filter

DL Down Link

FA Fan Array Module

FS Fabric Switch Module

GE Gigabit Ethernet

IF Intermediate Frequency

LNA Low Noise Amplifier

MTBF Mean Time Between Failure

OPEX Operation Expenditure

PA Power Amplifier

PM Power Module

RPDC RRU DC Power

RSU RF System Unit

RTR RRU Transmitter and Receiver

SA Site Alarm Module

SDR Software Defined Radio

TEC Thermal Electric Cooler

uTCA Micro Telecom Computing Architecture

Zxsdr bs8900 a product description 20101026

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