CDMA 1x and EV-DO Network Enhancement China Telecom Wang Yuezhen

中国电信广州研究院 CTC Have a Great Success with CDMA  Users grow 5-folds in the last 3 years  Users will be double In the next 3 Years

中国电信广州研究院  Limited spectrum becomes the bottleneck for further growth CDMA UL CDMA DL MS Tx f=0.03N+825 MHz BS 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-B QLIC MRD Early Termination New PC Mode EVRC-NW Smart Blanking QOF RLIC DO Network Enhancement NLB SCM DNS SCML Multi-AT Paging …… Phase I Phase II Completed 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: % 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 Network: Software Upgrade Supported AT :Many 2.QLIC Network :No Change Supported AT :Some Network :No Change Supported AT :Some 3.MRD Network :No Change Supported AT :Few Network :No Change Supported AT :Few Network: Software and Hardware Upgrade Supported AT :New, Few Network: Software and Hardware Upgrade Supported AT :New, Few 5.NLB SCM Network: Software Upgrade Supported AT : all Legacy 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