CDMA System Configuration System Architecture MSC EIR E

CDMA System Configuration !

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

A REAL CDMA system MSC BTS

System Architecture

BSS configuration • BTS configuration • BSC/PCF configuration • PDSN configuration

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

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

Capacity adjust • Because of the data service has influence on the voice capacity – Manual adjust

Antenna Choosing • Omni • Sector • Single Polarization • Dual Polarization • Antenna Gain

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

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

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”

MSS configuration • MSC • HLR • SC

MSC configuration • Key points – Should we co-locate the MSC & HLR • Save a SS 7 transfer Rack – Capacity of MSC/HLR – Traffic per sub – SS 7 links calculation

MSC & HLR SS 7 links MSC (E 1) SS 7 To IP IP Ethernet HLR

SS 7 calculation • • Signaling over A interface Signaling to HLR Signaling to PSTN Signaling to other MSC Signaling to VMS ……… e H d a c a e h

MSC auto-calculation

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

Other configuration • • • WIN VMS Transmission/Microwave Power system DDF

SVBS • • Codec for QCELP, EVRC and 64 kb/s PCM CDMA system power control functions Signaling interface between MSC and BSC(SS 7) Selector : process the routines of Handoff/Handover Wireless 64 K PCM CODEC SVBS 8 K EVRC Wireless

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

CDSU • 192 channels per 1 E 1. • Based on Packet data mode Abis CDSU BSC Non-channelized E 1 CDSU SDH PDH Satellite Micro. Wave …. CDSU BTS

CDSU • Data communication between BTS and BSC • Using normal E 1 • Daisy chain networking Abis Based On CDSU E 1 To BSC BTS E 1 BTS

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

Antenna

Sector Antenna • 20 、30 、65 、90 、105 、120 、180

Polarity single

Polarity Dual

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.

Antenna choose 2 • Antenna Gain – 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

Antenna Gain Antenna • Normal Gain Higher Gain Lower Gain

Polarity Relative position has to be carefully adjusted 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

Tilt

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

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

Multiple Access Methods