CDMA2000²£·~µû¦ô¥i§ïµ½3Gºô¸ô®Ä¯àªº§Þ³N(­^¤å¤º®e)

The CDMA Development Group (CDG) has reported that CDMA2000 operators and vendors gathered last month in San Francisco at the CDG’s semi-annual Technology Forum to discuss new methods to expand CDMA2000 network coverage and capacity, and further improve quality. Some of the proposed techniques include interference cancellation, 4G vocoders, SIP header reduction, digital RF transmitters, cross layer optimization and mobile transmit diversity. These cutting-edge technologies can potentially increase the CDMA2000 network capacity by 35-50%, improve capacity utilization by 2-7 times and reduce content delivery time by 40-60%.



As voice and data traffic increases and the demand for more bandwidth-intensive multimedia applications grows, operators are looking for new methods to expand capacity and improve the performance of their existing networks,?said Perry LaForge, executive director of the CDG. “There are a number of innovative solutions available to CDMA operators. The Technology Forum and other CDG events are excellent venues for operators and vendors to discuss them.?



At the San Francisco Forum, vendors presented a number of their latest products. For interference limited systems and systems near capacity, TensorComm reported that their Interference Cancellation product, when applied to the mobile baseband, can provide gains of up to 6 dB and can increase user data throughput by as much as 50%. Mobile Transmit Diversity solutions, such as Magnolia Broadband provides, can increase capacity from 35% - 50%. LGE is also looking at interference cancellations techniques at the receiver side to achieve similar results. These solutions could provide carriers with CAPEX (capital expenses) and OPEX (operating expenses) savings as well as significant improvement in QoS and user experience.



Higher capacity throughput can also be achieved by use of multiple beams asymmetric azimuth antenna arrays. TenXc Wireless?solution deploys the use of spatial processing adaptive digital beam forming array antennas at the base station. Simulation results show that throughput per sector can be increased by 1.8 to 1.9 times by using “bi-sector?array antennas.



http://www.cdg.org/news/press/2006/May09_06.asp