View
225
Download
4
Category
Preview:
Citation preview
CDMA 1x and EV-DO Network Enhancement
China Telecom
Wang Yuezhen
2012.06.14
中国电信广州研究院
CTC Have a Great Success with CDMA
Users grow 5-folds in the last 3 yearsUsers will be double In the next 3 Years
2008 2009 2010 2011 2012 Mar. 0
20
40
60
80
100
120
140
Mobile Subscribers (Million)
中国电信广州研究院
Limited spectrum becomes the bottleneck for further growth.
37 78 119 160 201 242 283
CDMA UL825 835
CDMA DL870 880
MS Tx f=0.03N+825 MHzBS Tx f=0.03N+870 MHz
MHz
How to improve capacity with limited spectrum?
CTC Have a Great Success with CDMA (cont,)
中国电信广州研究院
Network Enhancements
1x Network Enhancement
EVRC-BQLICMRDEarly TerminationNew PC ModeEVRC-NWSmart BlankingQOFRLIC
DO Network Enhancement
NLBSCMDNSSCMLMulti-AT Paging……
Phase I
Phase II
Completed
In progress
In progress
中国电信广州研究院
Network Enhancement Effects
1x Enhancement Phase I Features• EVRC-B(COP4) capacity gain: 20%~30%• QLIC FL capacity gain: >30%, generally 50% and
above• MRD FL capacity gain: environment impacts the MRD
gain mostly, two sample results is 56% , 158%
1x Enhancement Phase II Features• FL capacity gain: 130-140 % with all features , except
for MRD; 40-50% , if EVRC-B/EVRC-NW,QLIC are excluded;
• RL capacity gain: ~90% (New AT,RC8); ~80%, (Legacy AT,RC3)
• ET and RLIC are key features to improve capacity in FL and RL respectively
中国电信广州研究院
Deployment Strategy
1.EVRC-B • Network: Software Upgrade• Supported AT :Many
2.QLIC • Network :No Change• Supported AT :Some
3.MRD • Network :No Change• Supported AT :Few
4.SB,ET ,
EVRC-NW ,
New PC Mode, QOF, RLIC
• Network: Software and Hardware Upgrade• Supported AT :New, Few
5.NLB SCM
• Network: Software Upgrade• Supported AT : all Legacy
Deployment, 2011 Hot Spots
Mandatory
Optional
Plan to Do Field Trial in 2012 Q3
Under evaluation
中国电信广州研究院
Recommended