ZXSDR BTS Structure and Principle document introduces ZXSDR base station technology. It discusses the challenges of evolving communication technology and how software defined radio (SDR) addresses this. The main features of the ZXSDR platform include high integrity, flexible architecture, new functions, and lower cost. The document reviews the hardware and networking of the different types of ZXSDR base stations including the distributed BS8700, indoor macro BS8800, and outdoor macro BS8900. It also covers the work principles and operation and maintenance of the ZXSDR base station family.

1. ZXSDR BTS Structure and Principle

2. Objectives
 Introduction to ZXSDR
 Main Features of ZXSDR
 Main Differences Between ZXSDR and
Traditional 2G BTS
 ZXSDR BTS Family Introduction
 ZXSDR BTS Hardware Function
 Configuration of ZXSDR
 Alarm Handling

3. Introduction to ZXSDR
 Challenges in the Development of
Communication Technology
 SDR Concept

4. Challenge in the Development of
Communication Technology
 With the increasing communication demands, new
technologies come out in succession. The
common concern for communication operators
and equipment suppliers is how to upgrade
equipment more flexibly and protect the
investment of operators to greatest extent in the
continuous technology updates.
 The SDR concept is proposed for this problem.

5. SDR Concept
 The software defined radio (SDR) is defined as
radio in which some or all of the physical layer
functions are software defined.

6. SDR Concept
 The traditional communication equipment, namely the
hardware radio (HR), functions through the hardware.
Therefore, functions are often improved by upgrading the
equipment. SDR uses the hardware as a general
processing platform and functions through the software

7. Why to Select ZXSDR Series BTS?
 ZTE SDR serial BTS are a brand-new series of radio
products designed and produced by ZTE. They use the
advanced SDR technology and their hardware structure is
based on the uniform platform of ZTE, innovatively
 supporting multiple radio access methods, including GSM,
UMTS, CDMA2000, and WiMAX. In addition, SDR can be
smoothly evolved into the Enhanced EDGE/LTE.

8. Main Features of ZXSDR
 High-integrity
 Flexible Architecture
 Multiple New Functions
 Lower Cost

9. Main Features of ZXSDR
 GSM networking mainly uses three types of SDR
BTS:
 the first is indoor macro BTS 8800
 the second is outdoor macro BTS8900

10. Main Features of ZXSDR
the third is distributed BTS in which BBU is at the
local end and RU is at the remote end (RRU), such
as ZXSDR B8200 GU360 + ZXSDR B8860
GU906/GU186.

11. High-integrity
 Based on the All-IP transmission structure.
 Support RU of multiple bands.
 BBU supports 60TRX, and RU supports 6TRX/2TRX.
 RU60 board supports 6TRX, and RU02 board supports
2TRX.
 One fiber supports 24 TRXs.
 2G supports a maximum capacity of S666666 or
S12/12/12; 3G supports a maximum of 12CS; the dual
mode supports a maximum of S333 + S666 (GSM +
UMTS).
 Support the smooth evolution to LTE and HSPA+

12. Flexible Architecture
 Support the macro BTS and RRU
 BBU and RU within a cabinet is called a macro BTS.
RRU is called a distributed BTS
 Support FE/GE and E1/T1 (IPOE)
 Do not support the channelized E1/T1 currently
 Support the indoor/outdoor type
 Small size, light weight, energy-saving and
environment protection
 Support the technology evolution

13. Multiple New Functions
 Baseband frequency hopping
 Transmit/receive diversity
 DDT/DPCT
 Multi-carrier combination

14. Lower Cost
 Reduced unit cost
 Reduced typical networking cost
 Saved ABIS bandwidth
 Reduced operating cost
 Reduced maintenance cost

15. Main Differences Between ZXSDR and
Traditional 2G BTS
 The base band and RF unit are in the same
module in V2,3 BTS. ZTE SDR BBU and RU are
separated.
 lower power consumption .
 Capacity

16. Power Consumption

17. BB BBU+RRU Architecture:Arch
BTS is divided into BBU and RRU. One BBU can provide baseband
resources for multiple RRU.itec

18. Introduction to OMCB
A traditional 2G BTS (such as BTSV2 and BTSV3) is configured and
managed through OMCR, while the configurations of a SDR BTS should
be performed on LMT or OMCB. OMCR is used to configure some radio
data.
to OMCB

19. IP Abis Interface
 The other major difference for a SDR BTS from a
traditional 2G BTS is that the Abis/Iub uses IP protocol. Its
physical bearer can be FE/GE or E1/T1 (IP over E1/T1),
but not the E1/T1 of TDMBTS can fully use the existing
transmission equipment to save the user investment; if
FE/GE is used, BTS will obtain more bandwidth, which is
oriented to the communication system evolution to all IP.

20. ZXSDR BTS Family Introduction
 ZXSDR BS8700
 ZXSDR BS8800
 ZXSDR BS8900
 ZXSDR BS8906
 ZXSDR BTS Work Principle
 ZXSDR BTS Operation and Maintenance

21. BS8700
BS8900
BS8800
Distributed BTS BS8700, flexible
networking, 0 space requirement and
rapid deployment , can be used for both
indoor and outdoor coverage
B8200
R8860
RSU40/RSU60
+
+ =
Indoor Marco BTS BS8800, can be
installed in equipment room for indoor
coverage
RSU40/RSU60
+ =
Outdoor Marco BTS BS8900, can be
installed in cabinet for outdoor
coverage, it can adapt to various
environment
=
B8200
B8200
Micro BTS BS8906, provide Low-cost
integrated solution for single-sector
cell.
BS8906
+ =B8200
RSU40/RSU60
R8840
SDR Base Station Family

22. Agenda
 ZXSDR BTS Family Introduction
 ZXSDR BS8700
 ZXSDR BS8800
 ZXSDR BS8900
 ZXSDR BS8906
 ZXSDR BTS Work Principle
 ZXSDR BTS Operation and Maintenance

23. ZXSDR B8200
ZXSDR B8200 system description
ZXSDR B8200 GU360 is a dual-mode baseband unit. It can
support the GSM or UMTS system or both, and share the
common control function and transmission.
ZXSDR B8200 GU360 supports a maximum of 60 GSM
carriers, or 12 UMTS carrier-sectors.
ZXSDR B8200 hardware structure

24. ZXSDR B8200

25. ZXSDR R8860 Hardware Structure
ZXSDR R8860 is the outdoor dual-mode RF remote unit in
the ZXSDR serial BTS. The core of the R8860 is the multi-
carrier technology.
When the R8860 is used as the RF unit of the GSM, it can
support 1 - 6 carriers;

26. ZXSDR R8860 Hardware Structure
 The R8860 can be categorized into ZXSDR R8860 GU906
and ZXSDR R8860 GU186.
 The GU indicates that the GSM and UMTS dual modes
are supported.
 The 906 indicates that the GSM900 and UMTS900 are
supported, and the transmitting power is 80 W.
 The 186 indicates that the GSM1800 and UMTS1800
are supported, and the transmitting power is 80 W.

27. B8200+R8860 Installation and Distribution
Diagram

28. ZXSDR BS8700
 ZXSDR BS8700 consists of BBU (B8200) and RRU (R8860). 8200
is an indoor GSM/UMTS dual-mode BBU product. R8860 is an outdoor
GSM/UMTS dual-mode remote radio unit. B8200 and R8600
work in cooperation to implement BTS/Node B functions.
BS8700 supports GSM (850 MHz/900 MHz/1800 MHz/1900 MHz)
and UMTS (850 MHz/900 MHz/1800 MHz/1900 MHz). It can also
independently serve as a GSM or UMTS macro base station.

29. Hardware Architecture of BS8700
B8200
+
=
R8840
R8860
BS8700
Fiber
BBU
Radio UnitRadio Unit
SA/
SE CC
BB
(uBPG)
FS R8860
E1(75
Ω/120Ω
) / T1
GE/FE
Clock
Data
Control Signaling
Antenna
RRU
CPRI
The structure of BS8700 can express in the form of
BBU+RRU, with Base band and RF modules separated.
The structure of BS8700 can express in the form of
BBU+RRU, with Base band and RF modules separated.

30.  B8200 accomplishes the following basic functions
with RRU in Um/Uu, Abis/Iub and O&M interfaces.
 RRU and B8200 accomplishes UE access and radio link transmission
including RF processing, channel coding and decoding, channel
multiplexing and de-multiplexing, measuring and reporting, power
control, transmit diversity, receiving diversity, calibration and
synchronization.
 With Abis/Iub interface, RRU and B8200 connects with BSC/RNC and
accomplishes the following functions including cell management,
reporting BTS measurement information, broadcasting system
Information, implementing access control from BSC/RNC, mobility
management, radio resource management and controlling.
 With operating and maintenance interface, B8200 provides system
management functions including configuration management, alarm
management, status checking and system monitoring
ZXSDR B8200 Introduction

31. Based on Unified MicroTCA Platform
Base Band Unit - ZXSDR B8200
 Volume:
 88.4×482.6×197mm （ H×W×D ）
 Weight: 8.75kg (full configuration)
 Typical Power Consumption :
 GSM 80W / 6TRX
 Power Supply: -48V DC
 Temperature Range: -20℃ ～ 55℃
 Humidity Range: 5% ～ 95%
2U
482.6mm
88.4mm
 GSM Processing Capability:
 60TRX (12TRX *5uBPGs )
 24 Cell / BBU
 Abis Interface:
 16*E1/T1 ；
 1*FE/GE Electric/Optical(8 VLAN)
 To RRU: 12*1.25Gbps CPRI optical interface
Performance IndexPerformance Index
Physical IndexPhysical Index
Interface IndexInterface Index
19 inch

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

33. Agenda
 ZXSDR BTS Family Introduction
 ZXSDR BS8700
 ZXSDR BS8800
 ZXSDR BS8900
 ZXSDR BS8906
 ZXSDR BTS Work Principle
 ZXSDR BTS Operation and Maintenance

34. ZXSDR BS8800 Introduction
 ZXSDR BS8800 (hereafter BS8800) is one of multi-carrier, multi-mode indoor
macro base station in ZXSDR BTS series.
 BS8800 accomplishes UE access and radio link transmission including RF
processing, channel coding and decoding, channel multiplexing and de-
multiplexing, measuring and reporting, power control, transmit diversity, receiving
diversity, calibration and synchronization.
 BS8800 connects with BSC/RNC and accomplishes the following functions
including cell management, reporting BTS measurement information, broadcasting
system Information, implementing access control from BSC/RNC, mobility
management, radio resource management and controlling, FP processing and
ATM transmission management.
 With operating and maintenance interface, BS8800 provides system management
functions including configuration management, alarm management, status
checking and system monitoring.
 BS8800 adopts standard 19 inches rack structure. The volume is main cabinet
dimension: 950mm * 600mm * 450mm (H*W*D), auxiliary cabinet dimension:
700mm * 600mm * 450mm (H*W*D).

35. Integrated Indoor Macro Site - ZXSDR BS8800
Radio Unit
Baseband
Unit
Radio Unit:
RSU40/RSU60
Physical IndexPhysical Index
 Volume: 950×600×450mm （ H×W×D ）
(Main Cabinet)
 Weight: 135kg (Main Cabinet)
 Typical Power Consumption S666:735W(RSU60)
 Power Supply: -48V DC (-40~-57V DC)
Physical IndexPhysical Index
 Volume: 950×600×450mm （ H×W×D ）
(Main Cabinet)
 Weight: 135kg (Main Cabinet)
 Typical Power Consumption S666:735W(RSU60)
 Power Supply: -48V DC (-40~-57V DC)
Performance IndexPerformance Index
 GSM Processing Capability:
GSM: 60 TRX (12TRX * 5 BP boards
 24 Cell / BBU
Receive Sensitivity:
GSM -113dBm@single antenna
Performance IndexPerformance Index
 GSM Processing Capability:
GSM: 60 TRX (12TRX * 5 BP boards
 24 Cell / BBU
Receive Sensitivity:
GSM -113dBm@single antenna
Interface IndexInterface Index
Iub Interface:
8*E1/T1(Can expand to 16)
1*GE/FE Optical or 1*GE/FE Electrical
To RRU: 12 *1.25Gbps CPRI Optical Interface
Interface IndexInterface Index
Iub Interface:
8*E1/T1(Can expand to 16)
1*GE/FE Optical or 1*GE/FE Electrical
To RRU: 12 *1.25Gbps CPRI Optical Interface
SDR BS8800
B8200

36. 37
 Radio Unit:
 RSU40,RSU60
 Wiring Duct:
 Used to walk wiring in rack, such
as fiber or SFP cable between BBU
and RSU.
 Power Distribution Module:
 Passive power distribution unit
 Transmission Device:
 1U slot, it can provide built-in
transmission or microwave devices
to save operators’ investment.
 Base Band Unit:
 2*B8200 can be placed in
maximum
 FAN
 Used to perform heat dissipation
for RSU modules, 6 fans in total
BS8800 Hardware Structure
950mm
600mm
450 mm
Radio Unit
Power
Distribution Module
Wiring
Duct
Transmission
Device
Ventilation
Base Band
Fan

37. Easy to stack and expand, lower upgrade cost for customersEasy to stack and expand, lower upgrade cost for customersEasy to stack and expand, lower upgrade cost for customersEasy to stack and expand, lower upgrade cost for customers
BS8800 - Easy to Stack, Easy to expand
1650mm1650mm
450 mm450 mm
600mm600mm
Power Distribution
Module
Cable Chute
Base Band Unit
950mm950mm
Power Distribution
Module
Cable Chute
Radio Unit
Auxiliary Cabinet Fan
Radio Unit
Ventilation
Main Cabinet
950mm950mm
600mm600mm
450 mm450 mm
600mm600mm
450 mm450 mm
700mm700mm
Ventilation

38. Agenda
 ZXSDR BTS Family Introduction
 ZXSDR BS8700
 ZXSDR BS8800
 ZXSDR BS8900
 ZXSDR BS8906
 ZXSDR BTS Work Principle
 ZXSDR BTS Operation and Maintenance

39. ZXSDR BS8900 Introduction
 ZXSDR BS8900 (hereafter BS8900) is one of multi-carrier, multi-mode outdoor
macro base station in ZXSDR BTS series.
 BS8900 accomplishes UE access and radio link transmission including RF
processing, channel coding and decoding, channel multiplexing and de-
multiplexing, measuring and reporting, power control, transmit diversity, receiving
diversity, calibration and synchronization.
 BS8900 connects with BSC/RNC and accomplishes the following functions
including cell management, reporting BTS measurement information, broadcasting
system Information, implementing access control from BSC/RNC, mobility
management, radio resource management and controlling, ATM transmission
management.
 With operating and maintenance interface, BS8900 provides system management
functions including configuration management, alarm management, status
checking and system monitoring.
 BS8900 adopts standard 19 inches rack structure, is composed of outdoor RF
cabinets RC8910, RC8911, RC8931, site support cabinet BC8910, and battery
cabinet PC8910.

40. Integrated Outdoor Macro Site - ZXSDR
BS8900
Radio Unit:
RSU40/RSU60
Physical IndexPhysical Index
 Volume: 1900×600×600mm （ H×W×D ）
(Standard Configuration)
 Weight: 220kg ( with 3RSU)
 Typical Power Consumption:S666:725W(RSU60)
 Power Supply: -48V DC(-40VDC ~ -57VDC)
Physical IndexPhysical Index
 Volume: 1900×600×600mm （ H×W×D ）
(Standard Configuration)
 Weight: 220kg ( with 3RSU)
 Typical Power Consumption:S666:725W(RSU60)
 Power Supply: -48V DC(-40VDC ~ -57VDC)
Interface IndexInterface Index
 Abis interface:
8*E1/T1(Can expand to 16)
1*GE Optical or 1*GE/FE Electrical
 To RRU: 12 *1.25Gbps CPRI Optical interface
Interface IndexInterface Index
 Abis interface:
8*E1/T1(Can expand to 16)
1*GE Optical or 1*GE/FE Electrical
 To RRU: 12 *1.25Gbps CPRI Optical interface
SDR BS8900Base Band Unit:
B8200
Performance IndexPerformance Index
 GSM Processing Capability:
GSM: 60 TRX (12TRX * 5 BP boards)
 24 Cell / BBU
Receive Sensitivity:
GSM -113dBm@single antenna
Performance IndexPerformance Index
 GSM Processing Capability:
GSM: 60 TRX (12TRX * 5 BP boards)
 24 Cell / BBU
Receive Sensitivity:
GSM -113dBm@single antenna

41. 42
SDR BS8900 Hardware Structure
 Radio Unit:
 RSU40,RSU60
 6*RU 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:
 7U slot with DC power supply, it can provide
built-in transmission or microwave devices
to save operators’ investment, 4U slot with
AC power supply
 Base Band Unit:
 B8200
 AC /DC Unit(B121):
 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
PDM
Lightning
protection box
Cable rack
FAN
Battery
Radio Unit

42. Agenda
 ZXSDR BTS Family Introduction
 ZXSDR BS8700
 ZXSDR BS8800
 ZXSDR BS8900
 ZXSDR BS8900A
 ZXSDR BS8906
 ZXSDR BTS Work Principle
 ZXSDR BTS Operation and Maintenance

43. ZXSDR BS8900A

44. Hardware Architecture
 BBU performs Abis/Iub interface functions, signaling processing,baseband
processing, remote and local O&M functions, working status monitoring, and
alarm functions.
 RRU performs terminal access and RF link transmission function through
Um/Uu interface.

45. ZXSDR BTS Hardware Function
 Clock and control module (CC):
 Function: frame management, GPS/BITS clock
access, Abis/Iub interface, Ethernet switch (switch
between the signaling stream and media stream)
 Location: fixed in slot 1 or 2. You can insert one
or two (active/standby) boards

46. ZXSDR BTS Hardware Function
 Network switch module (FS):
 Function: provide the interface between the BBU and RRU to switch
the baseband IQ data.
 Location: fixed in slot 3 or 4. You can insert one or two (for load
sharing) boards.
 Baseband processing board (BP):
 Function: the BP board can be divided into two categories: the UBPG
(common GSM baseband processing board) supporting the GSM, which
modulates/demodulates 12 IQ channels, and supports baseband FM and
dynamic/static power control.
 Location: slot 5, 6, 7, or 8, or slot 3 or 4 (only one is inserted,
because the FS needs a slot).

47. ZXSDR BTS Hardware Function
 Field alarm module (SA):
 Function: provide 8 E1/T1 interfaces, dry contact interfaces (6
inputs + 2 inputs/outputs), and alarm monitoring.

Location: fixed in slot 13.
 Power management module (PM):
 Function: provide -48 V DC input, and the power management
function such as over-/under-voltage protection.
 Location: insert one or two (active/standby) boards in slots 14 and
15.

48. Configuration of ZXSDR
 OMCR Data Configuration
 OMCB Data Configuration

49. OMCR Data Configuration
Task Purpose
 Set the BSC global resource configuration parameters.
 Configure the Abis interface board and OMCB interface
bard of the BSC.
 Configure the Abis interface, OMCB interface, IP interface
of the BSC virtual address.
 Configure the logical site and radio parameters of the SDR

50. OMCR Data Configuration
Task Preparation
 The operating system, database and iOMCRV6.20 network
management including the OMCR and OMCB are correctly installed
and run normally.
 The A interface and Gb interface of the iBSC are connected, and the
dialing test is normal.
 IP addresses of the SDR site, Abis interface on the BSC, OMCB
interface, OMCB interface and the virtual IP address of the BSC are
planned. The module number corresponding to the SDR on the BSC
and Abis interface position are also planned.