1. ZTE University www.univ.zte.com.cnwww.univ.zte.com.cnZTE Confidential
Course 2
BSS Hardware
Introduction and Operation
• ZXC10-BSS Overview
• BSC Subsystem
• BTS Subsystem
• Antenna System

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ZXC10-BSS Overview
2004.10.3

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3GBTS
2GBTS
2GBSC
HLR/AUC
AAA Server
MSC/VLR
BSC/PCF
2GBTS
PDSN/FA
HA
PSTN/
PLMN
Abis
Abis
Abis
A(IOS4.X)
IP Cloud
Router
Router
IP
Cloud
Internet
Um(IS-95A)
Um(IS-95A)
Um(IS-2000)
A(IOS4.X)
CDMA2000 1X Network Structure
A InterfaceUm Interface
BSS

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ZXC10-BSS Overview
• The ZXC10 CDMA cellular mobile communication system is a
new-generation (3G) digital cellular mobile communication
system developed by ZTE on the basis of IS-2000 standards
with the purpose of catering to the above requirements.
• The ZXC10-BSS is the core part of a CDMA2000 digital
cellular mobile communication system developed according to
IS-2000 .
---The interface between BSS and MS (Mobile Station) is Um
interface; and the interface between BSS and LE (Local
exchange) is A-interface.
---The BSS mainly performs the function of information
interaction in the air with MSs, and supports high-speed
packet data services at a rate of up to 153.6kbps.
• The ZXC10 CDMA cellular mobile communication system is a
new-generation (3G) digital cellular mobile communication
system developed by ZTE on the basis of IS-2000 standards
with the purpose of catering to the above requirements.
• The ZXC10-BSS is the core part of a CDMA2000 digital
cellular mobile communication system developed according to
IS-2000 .
---The interface between BSS and MS (Mobile Station) is Um
interface; and the interface between BSS and LE (Local
exchange) is A-interface.
---The BSS mainly performs the function of information
interaction in the air with MSs, and supports high-speed
packet data services at a rate of up to 153.6kbps.

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ZXC10-BSS Network Mode
• Star Networking
• Chain Networking
• Star-Chain Combined Networking
• Star Networking
• Chain Networking
• Star-Chain Combined Networking

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BSC
BTS0
BTS1
BTS2
BTS3
BSC
BTS0 BTS1 BTS2
Star Networking Chain Networking
Popular in urbon area Used in some rural area

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Star and Chain combined
Networking
BSC
BTS0 BTS1 BTS2
BTS3
BTS4

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B-HIRS&S-HIRS
E1
ASM
Ot her
BSC
SVBS
CPS
TFS
HI RS
CDSU
CDSU
BDS
RFS
TFS
BSC
BTS
BSM
Et her net
E1
GPS ant enna
MSC
PCFS
PSDN
100M
Et her net
E1
OMC
GPS ant enna
Big HIRS
Small HIRS
Small HIRS
Small HIRS
Any equipment to
communicate with
other subsystems
can execute
communications
and data exchange
without system
hardware structure
changes only if it is
connected with a
non-occupied port
of “big HIRS” and is
allocated with
network address.

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SMALL HIRS － SVBS
SVMSVM
co
dis
SVM
SVICMNIM
MSC
E1 HW
RS_422

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SMALL HIRS － BDS
CCM
CHMCHM
co
dis
RFIM
BTS_CDSU
BSC_CDSU
E1 RS_422

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System Working Principle （ 1 ）
• One of the biggest characteristics of CDMA BSS system is
that service/signaling switching between subsystems or
modules is not in the traditional circuit switching mode but
in the high-speed packet data network switching mode.
---- Hence the system provides the functions of flexible
structure and convenient addition of functional modules.
It can satisfy the switching requirement of voice
communications and adapt to high-speed multimedia data
services. Hence it realizes convenient transition to 3G
system.
• One of the biggest characteristics of CDMA BSS system is
that service/signaling switching between subsystems or
modules is not in the traditional circuit switching mode but
in the high-speed packet data network switching mode.
---- Hence the system provides the functions of flexible
structure and convenient addition of functional modules.
It can satisfy the switching requirement of voice
communications and adapt to high-speed multimedia data
services. Hence it realizes convenient transition to 3G
system.

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• The network structure of CDMA BSS is of two levels:
---The first level is HIRS subsystem in BSC, which is
called “big HIRS”. It is the packet data switching center of the
system.
---The second level is the packet data switching network with relatively
low speed formed in SVBS or BDS subsystem, which is called “small
HIRS”. It mainly provides packet data switching services for modules
in SVBS or BDS subsystem
• The network structure of CDMA BSS is of two levels:
---The first level is HIRS subsystem in BSC, which is
called “big HIRS”. It is the packet data switching center of the
system.
---The second level is the packet data switching network with relatively
low speed formed in SVBS or BDS subsystem, which is called “small
HIRS”. It mainly provides packet data switching services for modules
in SVBS or BDS subsystem
System Working Principle （ 2 ）

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System Logical Structure
BTS BSC
BSMCPSSVBSHI RSCDSUTFS
PAM
CPM
SVICM
SVM
NCM
NIM
CDSU
GPSTM
TCM
HPA
CHM
CCM
RFIM
SAM
子系
统
模块/ 单
板
PS
PPM
PSMC
PSMD
PSMB
RFS
BTM
TRX
RFE
BDS FDM
BSS
CDSUTFS
CDSU
GPST
TCM
PS
PSMB
PDM
ASM
PCFS
PCFIM
PCF
BSS comprises BSC and BTS. In logic, BSC and BTS are two
systems in cooperation to provide services for CDMA mobile
subscribers.
In hardware, these are two different physical entities in
different positions in the telecom network.
BSS comprises BSC and BTS. In logic, BSC and BTS are two
systems in cooperation to provide services for CDMA mobile
subscribers.
In hardware, these are two different physical entities in
different positions in the telecom network.
Sub-
system
Moudle/
Board

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ZXC10-BSS Features
• 1. Advanced ness: The system makes use of a lot of advanced technologies, for
example high-speed packet switching.
• 2. Forward compatibility: The system is designed by fully considering the
transition to the third-generation (3G) mobile communication system. High-speed
packet data services can evolve smoothly to 2M.
• 3. High integrity: ZXC10-BSS makes usage of a lot of advanced components to
improve system integrity and reduce board types and amount.
• 4. High reliability: The amount of boards in the system is reduced. Important
boards of the system adopt 1+1 or N+1 redundancy configuration and software
error tolerance design. System reliability is highly improved.
• 5. Configuration flexibility: In addition to supporting traditional networking
modes, ZXC10-BSS also realizes the daisy chain connection mode for up to 6
BTSs. According to the requirements, each BTS can be configured into 1TRX/1-
sector to 4TRX/3-sectors.
• 6. Supporting rich service types: ZXC10-BSS supports voice calls (8K, 13K, 8K
EVRC voice coding), test calls (Markov call, Loop back call, TDSO call), data
calls, circuit-type data services (asynchronous data and G3 fax), and
supplementary services.
• 1. Advanced ness: The system makes use of a lot of advanced technologies, for
example high-speed packet switching.
• 2. Forward compatibility: The system is designed by fully considering the
transition to the third-generation (3G) mobile communication system. High-speed
packet data services can evolve smoothly to 2M.
• 3. High integrity: ZXC10-BSS makes usage of a lot of advanced components to
improve system integrity and reduce board types and amount.
• 4. High reliability: The amount of boards in the system is reduced. Important
boards of the system adopt 1+1 or N+1 redundancy configuration and software
error tolerance design. System reliability is highly improved.
• 5. Configuration flexibility: In addition to supporting traditional networking
modes, ZXC10-BSS also realizes the daisy chain connection mode for up to 6
BTSs. According to the requirements, each BTS can be configured into 1TRX/1-
sector to 4TRX/3-sectors.
• 6. Supporting rich service types: ZXC10-BSS supports voice calls (8K, 13K, 8K
EVRC voice coding), test calls (Markov call, Loop back call, TDSO call), data
calls, circuit-type data services (asynchronous data and G3 fax), and
supplementary services.

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BSS System Technical
Performance （ 1 ）
• 1. It adopts the packet switching network structure and provides 128 full-duplex
ports. The rate of each port is 8 Mbps;
• 2. It provides the radio resource management and BTS monitoring functions to
implement BSS operation and maintenance management and BTS tests;
• 3. It supports star, chain and ring networking of BTS and provides the daisy
chain connection function of BTS;
• 4. It supports 8KQCELP, 13KQCELP and EVRC algorithms and provides
strong background noise suppression ability;
• 5. It supports data calls originated by MS, LE or PDSN. It supports circuit-type
data services (asynchronous data and G3 fax) and high-speed packet data
services of up to 153.6kbps;
• 6. It can provide up to 240 E1s to be connected with LE;
• 7. It can support up to 7200 selectors/vocoders;
• 8. Its maximum traffic processing ability is up to 5040Erl;
• 9. It can be connected with up to 380 BTSs;
• 1. It adopts the packet switching network structure and provides 128 full-duplex
ports. The rate of each port is 8 Mbps;
• 2. It provides the radio resource management and BTS monitoring functions to
implement BSS operation and maintenance management and BTS tests;
• 3. It supports star, chain and ring networking of BTS and provides the daisy
chain connection function of BTS;
• 4. It supports 8KQCELP, 13KQCELP and EVRC algorithms and provides
strong background noise suppression ability;
• 5. It supports data calls originated by MS, LE or PDSN. It supports circuit-type
data services (asynchronous data and G3 fax) and high-speed packet data
services of up to 153.6kbps;
• 6. It can provide up to 240 E1s to be connected with LE;
• 7. It can support up to 7200 selectors/vocoders;
• 8. Its maximum traffic processing ability is up to 5040Erl;
• 9. It can be connected with up to 380 BTSs;

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BSS System Technical
Performance （ 2 ）
• 10. The maximum amount of PPP connections supported by packet
data reaches 40,000;
• 11. The channel board supports the sharing of all sector channel units
at the same carrier frequency;
• 12. It supports forward/reverse power control;
• 13. It supports macro-cellular, micro-cellular and Pico cellular;
• 14. It supports a variety of soft handover modes: intra-BTS soft
handover, intra-BSC soft handover, and inter-BSC soft handover;
• 15. It supports the cell breathing function to ensure the service quality
of busy cells;
• 16. It supports cell shrinkage and expansion;
• 17. It supports the frequency configuration of Band Class 0
（ 800MHz cellular frequency band ） 、 Band Class 1 （ 1900MHz
PCS frequency band ）和 Band Class 5 （ 450M frequency band).
• 10. The maximum amount of PPP connections supported by packet
data reaches 40,000;
• 11. The channel board supports the sharing of all sector channel units
at the same carrier frequency;
• 12. It supports forward/reverse power control;
• 13. It supports macro-cellular, micro-cellular and Pico cellular;
• 14. It supports a variety of soft handover modes: intra-BTS soft
handover, intra-BSC soft handover, and inter-BSC soft handover;
• 15. It supports the cell breathing function to ensure the service quality
of busy cells;
• 16. It supports cell shrinkage and expansion;
• 17. It supports the frequency configuration of Band Class 0
（ 800MHz cellular frequency band ） 、 Band Class 1 （ 1900MHz
PCS frequency band ）和 Band Class 5 （ 450M frequency band).

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The End!