ZXSDR Base Station Structure and Principle Overview

ZXSDR Base Station Structure
and Principle
ZTE University

Content
ZXSDR Base Station Family Overview
ZXSDR Base Station Introduction
ZXSDR Base Station Highlights

Evolution of Multi-Mode Base Station
ZTE macro-Base Station, IP
architecture, 18TRX cabinet
Different Base Station
systems overlapped
TDM/ATM platform
Narrowband architecture
Low integration and high
consumption
G1 Multimode
Base Station
Different Base Station Systems
Interchanged
3G BBU/RRU Interchangeable
IP/ATM architecture
Increasing integration
G2 Multimode
Base Station
Shared broadband multi-carrier module
Shared uTCA BBU
Full-IP architecture and unified platform
Multi-system conversion for same frequency
software
Ultra-high integration and low consumption
G3 Multimode
Base Station - SDR
Unified Radio Resource
Management
System conversion for
adjacent frequency software
Integrated BSC function
MESH network Architecture
G4 Multimode
Base Station - Flat SDR
ZTE SDR, 36TRX cabinet
Traditional macro-Base
Station, ATM architecture,
12TRX cabinet

Future Oriented SDR Technology ——
Ensuring Multi-Mode Network Convergence
W
H
H+
G
L
Convergence
SDR
Based on unified IP platform
with MCPA
New generation multi mode base
station
Convergence, revolution for
traditional base station
•Smart software supports LTE
evolution
•Smart configuration supports
different systems
•Same base station supports
different systems
•Software upgrade supports
different evolutions
•Multi-mode
•Multi-band
•Flat network
•Smooth evolution
Software
Solution
Define
Designed
Radio
Refarming

Innovative Base Station Platform
 Unified multi-mode and multi-frequency band
Base Station hardware platform
 μTCA –based BBU baseband processing unit
 Platform structure with separated baseband
and RF units
 RF unit based on MCPA
中兴通讯SDR解决方案助力中国移动积极应对移动网络的发展和演进
Spectrum resource
optimization utilization
Network resource optimization
integration
Smooth wireless network
evolution
Optimal TCO solution
CDMA2000 WCDMA
LTE
GSM
TD-SCDMA

ATCA/mTCA
 ATCA (Advanced Telecommunication Computer Architecture):
adopted by PICMG in 2003
 Micro TCA (u TCA): ATCA, be fit for accessing network

Broadband MCPA
 Single-Carrier PA  Multi-Carrier PA
Combiner & Antenna
Interface
Digital IF Process
BBU
PA1
TRX1
PA2
TRX2
PA3
TRX3
PA4
TRX4
f1 f2 f3 f4
Duplex & Antenna
MCPA
MTRX
Interface
BBU
Digital IF Process
（f1~f6)
（f1~f6)
SDR design is based on MCPA at the same frequency;
MCPA provides flexible frequency optimization technology and better equipment integrity.

SDR Based Uni-RAN Solution Highlights
Convenient
Operation
Smooth
Evolution
Convergence
Energy
Saving
Common
Components Shared
•Different BP boards
SDR RRU Spectrum
Refarming Capable
Multi-band Supported
Flexible
Networking
Multi-Mode Base Station
and Convergent Radio
Network Controller
Multi-band Support
Smooth Evolution
EDGE Evolution
GSM->UMTS->LTE
Full Speed HSPA
64QAM HSPA+
MIMO HSPA+
DC+64QAM HSPA+
50% PA Efficiency
D-PT Technology
3 Sector RRU Solution
Green Energy
Outdoor Installation
Zero Footprint
Smaller Size
Lighter Weight
High Quality Base Station
Product
High Reliability Networking
Unified O&M System
Powerful Network
Optimization Tools
High
Performance

SDR Based Series Base Stations Family
Multi-Mode Supported
 GSM/UMTS/HSPA
 HSPA+/LTE
Multi-Band Supported
 G/U900M, G/U1800M
 U/L2100M, U/L2600M
Long term TCO Saving
 50% HPA Technology
 Smart Carrier On/Off
 3 Sectors in 1 RRU
Smooth Evolution
 64QAM HSPA+
 MIMO HSPA+
 LTE
 Based on SDR hardware platform, all IP and multiple carriers capable
 All base stations share same components, higher integration and less spares
Baseband Unit
B8200
R8860
R8840
Indoor Macro
ZXSDR BS8800
Outdoor Micro
ZXSDR BS8906/8906E
Distributed Macro
ZXSDR BS8700
RSU40
RSU60
RSU82
Outdoor Macro
ZXSDR BS8900A
Radio Unit
RSU40
RSU60
RSU82
R8880 R8882

RRU
BBU
Indoor Macro
Outdoor
Macro
 MCPA-based broadband Radio
Unit with multi-mode supported.
 Sufficient output power of HPA
with lower power consumption.
 MicroTCA structure Base Band
Unit with high reliability and
easy expansion.
 High integrity & processing
capability; upgrade to HSPA+ via
software; minimum upgrade cost
to support LTE.
ZTE SDR 4 Key Features
SDR Base Station Key Features

SDR Base Station Introduction
 Baseband Unit and Radio Unit
 Distributed Base Station: ZXSDR BS8700 Introduction
 BBU: B8200
 RRU series
 Macro Indoor ：ZXSDR BS8800
 Macro Outdoor： ZXSDR BS8900A
 Micro Outdoor：ZXSDR BS8906

Base Band Unit — SDR B8200
 Volume:88.4×482.6×197mm（H×W×D）
 Weight: 8.75kg (full configuration)
 Typical Power Consumption :
UMTS: 80W(1BPC), 115W(2BPC)
GSM: 60W(12TRX), 75W(24TRX)
 Power Supply: -48V DC
 Temperature Range: -20℃～ 55℃
 Humidity Range: 5%～95%
Based on Unified MicroTCA Platform
2U
482.6mm
88.4mm
Uplink：192CE
Downlink：192CE
Downlink：43.2Mbps
Uplink：15Mbps
BPC Processing
Capability
 Processing Capability:
 UMTS: 30CS ( 6CS *5 BPCs)
 GSM: 60TRX
 Base Band Processing Capability:
 Uplink/ Downlink: 960CE
 Data Processing Capability:
 Downlink: 216Mbps
 Uplink: 75Mbps
 Abis/Iub Interface:
 2*STM-1；16*E1/T1；1*FE/GE Electric/Optical(8 VLAN)
 To RRU: 12*1.25Gbps CPRI optical interface
Performance Index
Physical Index
Interface Index
19 inch

CC Board Introduction
 GPS system clock & RF reference clock;
Abis Iub interface function;
Ethernet switch function, providing switch plan for signaling and media stream;
Rack management
Control & Clock Board

Board LED Color Meaning Description
CC
HS Blue
Plugging/Unpluggin
g Indicator
On: The board can be unplugged.
Flashing: The board is being activated or deactivated.
Off: The board cannot be unplugged.
RUN Green Running Indicator
Always on: The board is in reset state.
Flashing at 1Hz: The board is normally running.
Off: Self test fails.
Alarm Red Alarm Indicator
On: The board has an alarm.
Off: The board has no alarm.
E0S Green
E1/T1 status
indicator (link 0–3)
Alternate flash for different links; the max 4 flashes per
second; flashing at frequency of 5 Hz.
The first second: one flash means Link 0 is normal and
OFF means Link 0 is not in use.
The third second: two flashes means Link 1 is normal and
OFF means Link 1 is not in use.
The fifth second: three flashes means Link 2 is normal
and OFF means Link 2 is not in use.
The seventh second: four flashes means Link 3 is normal.
and OFF means Link 3 is not in use.
Recycle. Each cycle lasts for eight seconds.
CC Indicators

CC
E1S Green
E1/T1 status
The same as E0S.
E2S Green
E1/T1 status
The same as E0S.
E3S Green
E1/T1 status
indicator (link 12–
15)
The same as E0S.
MS Green
Active/Standby
status indicator
On: The board is in active status
Off: The board is in standby status
REF Green
GPS antenna state
or 2 MHz state,
connection state of
SMA Interface on
corresponding
panel GPS
Always on: The antenna feeder is normal.
Always off: The antenna feeder and satellite are normal,
in initialization state.
Slow Flash (flashing at 1 Hz)): The antenna feeder is
broken.
Fast Flash (flashing at 2 Hz): The antenna feeder is
normal but cannot receive satellite signal.
Slowest Flash (flashing at 0.5 Hz): Antenna short circuit
Quickest Flash (flashing at 5 Hz): No message is
received at the initialization stage.
CC Indicators

CC
ETH0 Green
Abis/Iub interface
link state
On: Physical link of Abis/iub network interface (optical or
electrical) is normal.
Off: Physical link of Abis/Iub network interface is broken.
ETH1 Green
Link state of ETH1
network interface
On: Physical link of network interface is normal.
Off: Physical link of network interface is broken.
CC Indicators

PM Board Introduction
Power Module
16 internal interface for +12V load power
16 internal interface for +3.3V management power
Measurement and protection of input over-voltage/under-voltage;
Output over-current protection and load power management
Power Module

SA/SE Board Introduction
Site Alarm Board
Site Alarm Board/Site Alarm Extender Board(optional)
Alarm monitor and rev control of no more than 9 fans;
Signal monitor and interface lightning protection for the rack;
Providing 6 input dry contact interfaces, 2 input /output dry contact interface;
Providing 8 lines of E1/T1 interface
Site Alarm
Extender

Jumper X5 is used to set E1/T1 transmission mode.
TWO LSB POSITIONS OF X5
TWO MSB POSITIONS OF X5
SA Jumpers

FS Board Introduction
Fabric Switch Board
Fabric Switch Module
Baseband IQ data exchange;
Providing interface between RRU and BBU

Baseband Board Introduction
 Universal Baseband Processing Board for
GSM
 Baseband modulation, maximum processing
capacity is 12 carriers;
 Supporting baseband frequency hopping;
 Supporting static and dynamic power control;
 Baseband Processing Board Type C
 maximum processing capacity is 6 carrier-sectors;
 maximum CE for UL/DL is 192/192 CE;
 maximum HSDPA throughput is 43.2Mbps
 maximum HSUPA throughput is 15Mbps
Baseband Board

UPBG
RUN Green
Running
Indicator
Always on: The board is in reset state.
On: The board has an alarm.
HS Blue
Plugging/Unplug
ging Indicator
On: The board can be unplugged.
Flashing: The board is being activated or
deactivated.
Off: The board cannot be unplugged.
PM/FS/SA/uBPG/BPC Indicators

Radio Unit —RSU40（U）/RSU60（G/U）
Number Interface Interface Description
1 Power Power supply interface
2 AISG AISG device interface
3 Mon External device interface
4、5 Test、DBG Debug, test interface
6 TX RX
Interface between BBU and RRU or
RRU cascade
7 RXout、RXin Frequency expand interface
8 ANT Main and diversity antenna interface
 RSU40/RSU60 is radio unit based on MCPA
technology, consists of MCPA (multi-carrier
power module) module, transceiver module, and
duplex filter LNA, and connects antenna via
TX/RX, RX port.
 Compact and light
Feeder Interface
CPRI optical to BBU
or connect via SFP
high-speed cable
RX expand
interface

Radio Unit —RSU82(G/U)
Number Interface Interface Description
1 ANT Main and diversity antenna interface
3 TX RX
Interface between BBU and RRU or
RRU cascade
5 Power Power supply interface
1
5
4
2
3
1
 RSU 82 is for both GSM and UMTS;
 2 PA: 2T4R;
 Weight: 15Kg
 Dimension: 482mm x 72mmx360mm
 Max TOC:
 GSM: 2×80W (GMSK)/2×50W(8PSK)
 UMTS: 2×80W(900M)，2×60W(2100M)
 Sensitivity:
 GSM: -113dBM
 UMTS: -126.5dBm@ single antenna
-129.2dBm@ Dual antenna
 Frequency band: 900M, 1800M, 2100M

Hardware Architecture of BS8700
B8200
+ RRU
BS8700
Fiber
BBU
Radio Unit
Radio Unit
SA/
SE/
NIS CC
BB
FS RRU
E1
GE/FE
Clock
Data
Control Signaling
Antenna
STM-1
CPRI
The structure of BS8700 is BBU plus RRU, with separated modules as Base band unit and RF unit.

Remote Radio Unit – R8840
Performance Index
 Support maximal 4 carriers
 Support 1C1S ~ 4C1S
 Output Power: 60W
 Receive Sensitivity:
-126.5dBm@sigle antenna
-129.2dBm@dual antenna
Frequency: 2100MHz
Physical Index
 Volume: 370×320×160mm （H×W×D）
 Weight: 16.5kg
 Typical Power Consumption:
100W(1C)/125W(2C)/160W (3C)
 Temperature Range: -40℃～+55℃
 Protection Class: IP65
Interface Index
 2 * 1.25G CPRI Optical Interface
SDR R8840 320mm 160mm
370mm

Remote Radio Unit —— ZXSDR R8860
ZXSDR R8860 （1T2R）
 Carrier Configuration:
 Support maximal: 6TRX or 4 carriers
 Support maximal: 4G1U
 Output Power：80W
 Receive Sensitivity: -113dBm[GSM]
-126.5dBm@sigle antenna[UMTS]
-129.2dBm@dual antenna[UMTS]
 Frequency:
850MHz, 900MHz, 1800MHz, 1900MHz
Performance Index
 2*1.25G CPRI Optical interface
Interface Index
 Volume: 370×320×197mm （H×W×D）
 Weight: 20Kg
 TPC: UMTS:1C: 155W/2C: 185W/3C: 210W/4C: 230W
GSM: 200W(900M) /210W(1800M)
GU: 4G1U 215 W
 Temperature Range:-40℃～+55℃
Physical Index
370mm
320mm
• Support GSM and UMTS.

R8860 Structure
 ADTR: Completes the function of transmitter by one path and receiver
by two paths, providing interface and control function.
 PA: Provides amplification function during transmission for RF signal.
 DFL: Provides receiving & transmitting combination and division
function for RF signal, and provides low noise amplification function for
signal. It includes duplexer by one path and receiving filter by one path.
 RIE: Mainly completes the transition between PIB board test and
monitoring interface signal.
 PIB: Mainly completes electrically tuned antenna and tower amplifier
AISG interface protection and DTR board interface signal transition.
 RPDC: Supplied by DC power conversion.

R8860 Interface
No Label Interface
1 LC1
Interface between
BBU and RRU/RRU cascading interface
2 LC2
Interface between
BBU and RRU/RRU cascading interface
4 Mon
External equipment interface (monitoring,
LMT, etc.)
5 DC IN Power interface
6 RX Interface to receive diversity RF cable
7 RX/TX
Interface to transmit / receive main
diversity RF cable
8 RXout Frequency expansion interface
9 RXin Frequency expansion interface
10 GND Machine Grounding

RRU
RUN Green Running Indicator
Always on: The board is in resetting or starting status.
Flashing at 5Hz: The board is downloading version.
Flash in 5Hz: critical or severe alarm
Flash in 1Hz: normal or minor alarm
Link Green
Optical link
indicator
On: normal fiber connection
Off: disconnected fiber
Flash in 5Hz: consider this link as clock reference source,
and phase-locked loop in fast capture status
Flash in 0.25Hz: consider this link as clock reference
source, and phase-locked loop in trace status
RF Orange
RF working status
indicator
Off: without RF out put
On: with RF out put
R8860 Indicators

Remote Radio Unit – R8880A
Performance Index
 Support maximal 2 X 3 C
 Output Power: 2 X 60W
-126.5dBm@sigle antenna
Transmitter Frequency: 2110MHz~2170MHZ
Receiver Frequency: 1920MHz~1980MHZ
Physical Index
 Volume: 420×340×140mm （H×W×D）
 Weight: < 20kg
 Typical Power Consumption:
S1:135W(Single PA), 215W(double PA)
 Temperature Range: -40℃～+55℃
Interface Index
 2 * 1.2288G Optical Interface
SDR R8880A
420mm 140mm
340mm

Remote Radio Unit —— ZXSDR R8882
320mm
450mm
 Carrier Configuration:
 Support maximal [UMTS]: 2×3C carriers
 Support maximal [GSM]: 2×4 TRX
 Support maximal [GU]: 2×4G1U or 2×2G2U
 Output Power：2×60W
 Receive Sensitivity: -113.5dBm[GSM]
 -113.5dBm@sigle antenna[UMTS]
 -129.2dBm@dual antenna[UMTS]
 Frequency: 900M/1800M/2100MHz
Performance Index
Volume: 450×320×140mm （H×W×D ）
Weight: 20Kg
TPC ：684W（S3/3/3）
Power Supply: -48V DC, 110V AC, 220V AC
Temperature Range: -40℃～+55℃
Protection Class: IP65
Physical Index
ZXSDR R8882 (2T4R)
 2*1.25G CPRI Optical interface (2.5G and
3.072G are also applicable)
Interface Index
• Support GSM & UMTS

R8882 Structure
 TRM: Finish the function of transmitter and
receiver, which can provide the interface and
control function.
 PAD: Provide the amplification function of RF
signals on two channels.
 FLD: Provide the function of reception,
transmitting, combination, and division of RF
signals. It comprises of two duplexers and two
receiving filters.
 EPB : EMC protection at power, monitor interface,
and AISG interface.

R8882 Interface
No Label Interface
1 PWR Power jack
2 EAM External monitor interface
4 OTP1
BBU-RRU interface / RRU cascading
interface
5 OTP2
BBU-RRU interface / RRU cascading
interface
6 ANT1TX/RX Antenna tx/rx interface on channel 1
7 ANT2RX
Diversity receiving antenna interface
on channel 1
8 ANT3RX
Diversity receiving antenna interface
on channel 2
9 ANT4TX/RX Antenna tx/rx interface on channel 2
10 - PE interface
1 2 3 4 5
9
8
7
6
10

R8882
RUN Green Running indication
Always on: The board is in resetting or starting status.
Flashing at 5Hz: The board is downloading version.
Flash in 5Hz: major or critical alarm
Flash in 1Hz: warning or minor alarm
Off: indicates no fault or resetting, starting or
downloading the version.
LINK1 Green
Status indication at
optical interface 0
ON: connection is ok at optical interface 0
Off: disconnected fiber
Flash in 5Hz: consider this link as clock reference source,
and phase-locked loop in fast capture status
Flash in 0.25Hz: consider this link as clock reference
source, and phase-locked loop in trace status
LINK2 Green
Status indication at
optical interface 1
The same meaning as LINK1
VSWR1
Green TX0 standing wave
indication
ON: TX0 standing wave is ok
OFF: TX0 standing wave is improper
VSWR2 Green
TX0 standing wave
indication
The same meaning as VSWR1
R8882 Indicators

Rapidly Networking Based on Distributed
Base Station
Wall mounted
Pole installation
Install on
top of the tower
Hanging
Desert
Snowfield Rainstorm
Rain forest
Less space required, flexible installation
Compact design, light and small
High reliability, suitable for terrible environment
 Light, easy for installation, save project cost
and Shorten the time for building network .
 Flexible networking.
 50％ high-efficient PA to reduce power
consumption
 Natural cooling design, 0dB noise
 Flexible power supply: AC/DC or Remote
power
 IP65 protection class to withstand terrible

Networking Topology of RRU
Loop Topology
Star Topology
Chain Topology
RNC/BSC
E1/T1
FE/GE
STM-1
B8200
B8200
B8200
RRU
RRU
RRU
 ZTE provides flexible networking for distributed site such as star, chain, loop and mix
topology to meet demands for customers.

Integrated Indoor Macro Site — ZXSDR BS8800
Radio Unit
Baseband
Unit
Radio Unit: RSU40/
RSU60/RSU82
Physical Index
 Volume: 950×600×450mm （H×W×D) (Main Cabinet)
 Weight: main cabinet<135 KG, Auxiliary Cabinet <115KG[with
RSU40/RSU60]
 TPC:
 RSU82 (850/900M): 1110W[S444]
 RSU40 (2100M): 780W[S222]
 Power Supply: -48V DC (-40~-57V DC)
Performance Index
 Processing Capability(with Auxiliary Cabinet):
GSM 36TRX + UMTS12CS
Uplink: 960CE (192CE*5BPC)
Downlink: 960CE (192CE*5BPC)
 Output Power: 60W/80W/2*80W(900/1800M), 2*60W(2100M)
GSM -113dBm@single antenna
UMTS -126.5dBm@single antenna
Interface Index
Aibs/Iub Interface:
8*E1/T1(Can expand to 16)
1*GE/FE Optical or 1*GE/FE Electrical
To remote RRU: 12 *1.25Gbps CPRI Optical Interface
SDR BS8800
BU: B8200
Main Cabinet

BS8800 Hardware Structure
 Radio Unit:
 RSU40, RSU60,RSU82
 Wiring Duct:
 Used to walk wiring in rack, such
as fiber or SFP cable between BBU
and RSU40/60/82.
 Power Distribution Module:
 Passive power distribution unit
 Transmission Device:
 1U slot, it can provide built-in
transmission or microwave
devices to save operators’
investment.
 FAN
 Used to perform heat dissipation
for RSU modules, 6 fans in total
950mm
600mm
450 mm
Radio Unit
Power
Distribution Module
Wiring
Duct
Transmission
Device
Ventilation
Base Band
Fan

BS8800 ——Easy to Stack, Easy to expand
1650mm
600mm
Power Distribution
Module
Cable Chute
Base Band Unit
950mm
Power Distribution
Module
Cable Chute
Radio Unit
Auxiliary Cabinet Fan
Radio Unit
Ventilation
Main Cabinet
950mm
600mm
600mm
450 mm
700mm
Ventilation

48
 BBU: B8200
 RRU series

Integrated Outdoor Macro Site – ZXSDR
BS8900A
Radio Unit:
RSU40/60/82
Physical Index
 Volume: 1600×600×600mm （H×W×D）
(Standard Configuration)
 Weight: 185kg (BC8910A+RC8911A)
TPC:
 RSU82 (900M): 1285W[S444]
 RSU40 (2100M): 865W[S222]
Power Supply: -48V DC, 220V AC, 380V AC
Performance Index
 Processing Capability:
 GSM 36TRX + UMTS12CS
Output Power:
60W/80W
GSM -113dBm@single antenna
UMTS -126.5dBm@single antenna
Interface Index
 Abis/Iub interface:
1*GE Optical or 1*GE/FE Electrical
2*STM-1
 To RRU: 12 *1.25Gbps CPRI Optical interface
ZXSDR BS8900A
Base Band Unit:
B8200

ZXSDR BS8900A Hardware Structure
 Radio Unit:
 RSU40, RSU60, RSU82
 6*RSU can be supported in maximum
 Power Distribution Module:
 Passive power distribution unit
 Heat Exchanger:
 Perform heat dissipation for base band,
power and transmission unit
Transmission Device:
 6U slot, it can provide built-in transmission
or microwave devices to save operators’
investment.
 Base Band Unit:
 B8200
 AC /DC Unit:
 Provide -48V DC power for BS8900, it
contains monitor unit and rectifier unit
 Battery Cabinet:
 the nominal capacity of the built-in batteries
is 300Ah
Heat Exchanger
Transmission
Device
Base Band Unit
AC/DC Unit
Battery
Power
Distribution
Module
Radio Unit

BS8900A Sub-Rack Introduction
BC8910A RC8910A RC8911A PC8910A
Baseband
Cabinet
Radio
Cabinet
Battery
Cabinet
ZXSDR BS8900A Component Module
 Dimension (H*W*D) for BC8910A,
RC8910A, RC8911A and PC8910A:
 800*600*600mm
 Weight(without battery):
 BC8910A: 82Kg
 RC8910A: 139Kg
 RC8911A: 99Kg
 PC8910A: 47Kg
 Power:
 220V AC (130V ~ 300V AC)
 -48V DC (-57 V DC ~ -40V DC)
 Temperature:
 -40°C ~ +55°C
 Protection: IP55
800mm
600mm
600mm
General Indices

52
 BBU: B8200
 RRU series

Integrated Micro Outdoor — SDR BS8906
Radio Unit:
RSU40/60
Physical Index
 Volume: 650 × 320 × 480 mm （H×W×D）
 Weight: 52kg
 TPC:RSU60(DC): 445W/900M; 460W/1800M(S4)
Power Supply: -48V DC, 110~240V AC
Performance Index
Processing Capability:
GSM: 60 carriers; UMTS: 30CS (with outdoor RRU);
GU: 4 TRX + 1 C or 2 TRX + 2 C
Same as B8200
 Output Power:
RSU60: GMSK 80W / 8PSK 50W/UMTS 80W
 RSU40: 60W
GSM: -113dBm @ single antenna
UMTS: -126.5dBm @ single antenna
-129.2dBm @ dual antenna
Interface Index
Abis/Iub Interface:
1*GE/FE Optical or 1*GE/FE Electrical
To RRU: 12 *1.25Gbps CPRI Optical Interface
SDR BS8906
B8200
BS8906 can be connected with RRU for outdoor
BBU solution.

BS8906 Hardware Structure
 FCE：Fan Control
Element
 LPU： Line Lightning
Protection Unit
 PSU：Power System
Unit
 APM：AC Protection
Module
 DPM：DC Protection
Module
PM
SA
CC
BPC
FS
F
A
N
APM/DPM
LPU/SDH
/微波IDU
FCE
PSU
RSU

GU Convergence Network Architecture
GSM
Base
Station
GSM BSC
UMTS RNC
UMTS Node B
IP/SDH
Backbone
IP/SDH
Backbone
Independent
GSM RAN
Independent
UMTS RAN
GSM NMS
UMTS NMS
Dual-mode base
staion controller
IP/SDH
Backbone
Convergence
RAN
G/U unified NMS
NetNumen
unified NMS
Multi-mode RRU
Multi dual mode BBUs
form baseband group
Remote RRU
Optical fiber
transmission is
adopted unifiedly
Multi-mode base
station
Multi-
mode
RRU

Convergence Network Evolving to LTE
GSM Working Mode
GSM
BBU in SDR platform BBU in SDR platform
 Same architecture for GSM/LTE,
universal hardware
 BBU supports LTE by adding
baseband board
 GSM/LTE dual-mode RRU evolution
 Lower TCO
 Higher reliability
 Faster deployment
GSM RRU
GSM /LTE RRU
(Same Frequency
band)
LTE RRU
(Different
Frequency band)
异频段新增RRU
同频段双模RRU
GSM LTE
 Co-shelf, co-rear board, co-power
 Co-clock, co-transmission
 GSM/LTE BBU can be flexibly
configured as per requirements
Co-Platform for Multi-Mode
Co-platform for multi-mode
Feature Advantage
G/L Working Mode
LTE RRU
(Different
Frequency band)

GSM
GSM
GSM
GSM
GSM
GSM
GSM
GSM
GSM
GSM
GSM
GSM
UMTS UMTS
UMTS
UMTS
Carrier and Power Software Configurable
UMTS
UMTS
UMTS
Carrier and Power Software Configurable
No
extra
insert
loss
GSM900
UMTS900
Traditional Solution
SDR Solution
Flexible GSM900/UMTS900 Capacity Reframing

 The sum of each TRX configured maximum output power is bigger than PA maximum output power.
 In the area with little traffic, BCCH carrier power configuration can be appropriately added by taking use
of dynamic power, and the remaining power is dynamically real-time shared among all TCH carriers to
enlarge coverage and reduce site quantity.
Dynamic Power Sharing Enlarging Site Coverage
30w
20w
30w
15w
20w
BCCH
carrier
TCH
carrier A
TCH
carrier B
30w
30w
40w
5w
30w
BCCH
carrier
TCH
carrier A
TCH
carrier B
 The sum of each TRX maximum transmission power is no
bigger than PA maximum output power
User A
User B
The sum of each TRX maximum
transmission power(100W) is bigger
than PA maximum output power
(80W).
User A
User B
 As user moves, each TRX transmission
power dynamically adjusts.
Dynamic
Power Sharing
30w
30w
40w
15w
20w
BCCH
carrier
TCH
carrier A
TCH
carrier B
Static Power Configuration

All IP-based Network Improving Transmission
Efficiency
iBSC
SDR Base
Station
MGW1
SGSN2
SGSN1
MSC Server
GGSN
TC Pool
IP Ater
MGW2
IP A
Flex A
IP Gb
Flex Gb
IP Abis
All IP baseband
processing unit
All IP-based network is the trend for
mobile communication.
SDR
Base
Station
 All IP-based network has better transmission efficiency.
Transmission
efficiency
increases by
87%
TDM E1
IP over E1
15 TRX/E1
23 TRX/2Mbps
IP over FE
28 TRX/2Mbps
 GE or IP over E1
transmission
 Mute frame and IP
head compression

One Logical Cell with Multi RRU Technology
BBU + RRU remote networking suits coverage scenes such as roads, bridges,
villages along the river and so on.
Split cabinet, only BBU installed
Multi-RRU co-cell, improving wireless utilization
Cell A Cell A
Cell A
Cell A
Cell A
Cell A
One logical Cell with Multi RRU dramatically reduces inter-cell switch,
and improves wireless utilization.
Cell A Cell A
•BCCH carrier power unchanged
•Increasing TCH carrier, using
reserved frequency point to absorb
traffic
•Not changing existing network
frequency planning
110
12.5
0 0
29.8
0 0
110
35.7
12.8
0
73.2 72.8
63.9
0
50
100
0kmph 400kmph 600kmph 800kmph
Remote expansion
Software configuration
Measured UL datarate (Kpbs) of high speed railway scenario
Multi RRU and AFC disable
Only AFC enable
Only Multi RRU enable
Multi RRU and AFC enable

SDR-Based Network Effectively Reducing Energy Consumption
Typical consumption for S444
725W
RRU
RRU
BBU
Multi-carrier PA
T
R
X
1
T
R
X
2
T
R
X
3
T
R
X
4
T
R
X
5
 Highly Efficient PA Improving Overall
Efficiency
 Antenna-Close Installation Avoiding Feeder
Loss
 Intelligent Software Power Saving
Technology
 Networking Mode Saving Energy Consumption
PA module adoptes
Doherty, DPD and
multi-carrier PA,
increasing overall
efficiency to over
20%.
RRU is installed close to
antenna, saving feeder loss.
For the same coverage
requirement, it reduces RF
output power, hence lowering
power consumption.
It supports some latest energy saving technologies such as
intelligent voltage adjustment, carrier priority control and
RRU module shutdown.
RRU adopts natual cooling system, BBU features in low
power consumption and concentration which requires less
equipment room and greatly reduces corollary equipments
and air-conditioner’s power consumption.
Constructing network by using SDR-based Base Station averagely saves single site’s energy by over 40%.
1250W
Traditional Base
Station
Multi-carrier Base
Station
Power consumption
descreased by 42%
T
R
X
6

Diverse Networking, tridimensional Coverage
Coverage Challenge in
Dense Urban
Complex environment of buildings
Bind area in buildings
Frequent handovers
Tridimensional Coverage by ZTE
SDR
Macro site and distributed site combined
together
Particular coverage for special area
1-6 cells deployment in single site

Rapid Installation and Simple Maintenance
RRU flexible installation
Macro base station without back board
 On the pole
 One person
 on the wall
 Installation by the wall
 All modules operation
at front, easy maintenance
BBU saves space greatly Modularized designation for many application
 19 inch width, 2U height.
 On transmission rack or
macro base station
 Directly on the wall
 BS8900 modularized designation,
flexible subcabinet configuration
 Integrated cabinet in suburb
 Horizontal
installation in weight
limited area

ZXSDR Base Station Structure and Principle Overview

ZXSDR Base Station Structure and Principle Overview

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