Zxsdr bs8900 a product description 20101026

Product Type Technical Proposal
ZTE Confidential Proprietary © 2008 ZTE Corporation. All rights reserved. I
ZXSDR BS8900A Product
Description

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 m
2
.
 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/DC
Power 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 Module
RSU82
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 Module
RSU
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
RC8910A
DC
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 interface
A3/A7 interface
A
MS
C
MSC
MGW
PCF
BSC
PCF
A8/A9 interface
RRU
RRU
RRU
RSU
RRU
RSU
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)
CHM
CHM
CHM
CHM
CH
SA
CC
GPS
GPS
CPRI
ABIS
FS
Fabric 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 -40C to +55C (-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
RFE
 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 = 10dB1dB), 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
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
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
RFE
 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 = 10dB1dB), 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
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
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
RFE
 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
BSC
BSC
...
...
Abis
E1/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
m
2
.

 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
R
S
U
R
S
U
R
S
U
R
S
U
R
S
U
R
S
U
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 A
Sec 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

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