1. CDMA System Configuration !

2. System Architecture MSC EIR IWF E F L Abis A B MS BTS BSC MSC VLR Um QD G SC M SC
HLR
VLR M H
PDSN
ESME
AUC
WIN/VMS

3. A REAL CDMA system
MSC
BSC
BTS

4. System Architecture

5. BSS configuration
BTS configuration
BSC/PCF configuration
PDSN configuration

6. BTS configuration preparation
Um loss(GOS)
Traffic per sub
Soft handoff rate
Antennae
Channels on the BTS

7. BTS calculation Traffic per sub Total capacity Total Traffic
Qty.
Traffic per sub
Total capacity
Total Traffic
Traffic per BTS
SCT
Qty.
Traffic per SCT
Channels
Per sector
Erl
Table B
Traffic per BTS
Divided by sector Qty.

8. Because of the data service has influence on the voice capacity
Capacity adjust
Because of the data service has influence on the voice capacity
Manual adjust

9. Antenna Choosing
Omni
Sector
Single Polarization
Dual Polarization
Antenna Gain

10. PCF PDSN
Ratio of data user
Calculation module
Total traffic
Calculation of “Qty. Of BSC Data Element（SDE）(actived PPP）”

11. IWF
Ratio of circuit data user
Total traffic
Calculation of “Qty. Of BSC Circuit Data Element”

12. BSS configuration Summary
Traffic
GOS
Erl B table
Voice Channel
Data Channel “Qty. Of BSC Data Element（SDE）(active PPP）”
Circuit data Channel ”Qty. Of BSC Circuit Data Element”

13. MSS configuration
MSC
HLR SC

14. MSC configuration Key points Should we co-locate the MSC & HLR
Save a SS7 transfer Rack
Capacity of MSC/HLR
Traffic per sub
SS7 links calculation

15. MSC & HLR
MSC
HLR
SS7 To IP IP
Ethernet
SS7 links
(E1)

16. Headache SS7 calculation Signaling over A interface Signaling to HLR
Signaling to PSTN
Signaling to other MSC
Signaling to SC
Signaling to VMS
………
Headache

17. MSC auto-calculation

18. PDSN,SC
Total Qty. of sub supported
Traffic

19. Other configuration
WIN
VMS
Transmission/Microwave
Power system
DDF

20. Real Picture of BSC HIRS: 高速互联路由子系统 CDSU:信道数据服务单元 CPS: 呼叫处理子系统
NCM: 网络控制板
NIM: 网络接口板
CDSU:信道数据服务单元
CPS: 呼叫处理子系统
CPM: 呼叫处理模块
TS：时钟子系统
TCM：时钟控制模块
GPSTM：GPS/GLONASS接收模块
SVBS:声码器/选择器子系统
SVM:声码器/选择器模块
SVICM:声码器/选择器控制模块
PCFS：分组数据业务子系统
PCF：分组数据业务模块
PCFIM：分组数据业务接口控制模块

21. SVBS Codec for QCELP,EVRC and 64kb/s PCM
CDMA system power control functions
Signaling interface between MSC and BSC(SS7)
Selector
Selector : process the routines of Handoff/Handover
8k,13k QCELP,8k EVRC
CODEC
SVBS
8K EVRC
Wireless
64K PCM
Wireless

22. SVBS One SVM can handle 15 channels
One SVBS sub-system can handle 120 channels
One ESVIM can handle 6 IWF channels
One SVBS rack can hold 10 SVBS sub-system
One BSC can support 6 SVBS racks

23. BSC BTS CDSU 192 channels per 1 E1. Based on Packet data mode CDSU
Abis
Non-channelized E1
CDSU
CDSU
SDH
PDH
Satellite
MicroWave ….
CDSU
CDSU

24. CDSU Abis Based On CDSU Data communication between BTS and BSC
Using normal E1
Daisy chain networking E1 E1
BTS
BTS
BTS
To BSC

25. BTS Data flow TRXs HPAs/LPAs RFEs Baseband Subsystem CEs TRXs
GPS
GPS + GPS
GPS + Glonass
Glonass
GPS*
BTS
TRXs
HPAs/LPAs
RFEs
Local RF Subsystem
Baseband
Subsystem
CEs
Cable
BTS
TRXs
HPAs/LPAs
RFEs
Remote RF Subsystem
Fiber

26. ZXC10-BTS 1x80基站收发信机机架结构 RFS:射频子系统 TFS：时钟频率子系统 BDS:基带调制解调子系统
RFE: 射频前端
HPA: 高功放
TRX: 收发信机
TFS：时钟频率子系统
GPS
TCM
FDM
BDS:基带调制解调子系统
RFIM: 射频接口模块
CHM32/64: 1x信道板
CCM: 通信控制板
CDSU:信道数据服务单元

27. Antenna

29. Sector Antenna
20、30、65、90、105、120、180

30. Polarity single

31. Polarity Dual

32. Antenna choose 1
20、30 (normally with high gain)for narrow belt areas and highways
65 :for density urban city. Standard antenna
90 :for suburb areas
105: for low traffic areas, like mountain areas with vast coverage needs
120、180 : for some very wide angle coverage. Seldom use.

33. Antenna choose 2 Antenna Gain Polarity
Higher gain, longer shooting range
Less gain , larger coverage near antenna
Polarity
Dual polarized antennas are easy to be with higher gains
Dual polarized antennas are easier to install

34. Normal Gain Higher Gain Lower Gain
Antenna Gain
Antenna
Antenna
Antenna
Normal Gain Higher Gain Lower Gain

35. Relative position has to be carefully adjusted
Polarity
Relative position has to be carefully adjusted
Antenna
Antenna
Antenna
Single polarity antenna
Dual polarity antenna
Single polarity antenna work in pairs. Engineering is very hard to do
Dual polarity antenna work with one enough. Engineering is very easy.
Omni antenna is single polarity only

36. Tilt
Phase adjust
电调下倾天线虽价格稍贵，但它下倾角度范围较大（可大于10）

37. PART II How to do configuration
BSC
SVM/PCF Capacity
CDSU How many base stations
BTS
CHM Capacity
RF Module Carriers/Sectors

38. PART II How to do configuration
International market is special
Making configuration is difficult then domestic market
Estimate
BSC: 5040Erl,7200
BTS: 4 carriers/ 3 sections. 0~50 channel per section

39. Multiple Access Methods