IEEE 802.16系统中针对AMR语音编码器的上行VoIP调度  

Uplink VoIP Scheduling for AMR Speech Codec in IEEE 802.16 Systems

作　　者：王立磊[1] 徐惠民[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《北京邮电大学学报》2009年第3期100-103,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家高技术研究发展计划项目(2006AA01Z235)

摘　　要：针对IEEE 802.16系统中基于自适应多速率(AMR)语音编码器的IP语音(VoIP)业务,提出了一种新的上行调度算法.该算法在用户的语音静默期,向信道质量指示(CQI)信道发送特殊的码分多址(CDMA)码来申请带宽.然后从系统容量、吞吐量、时延和系统信令开销方面分析了所提策略的性能,并且进行仿真.从理论分析和仿真结果可以看出,新算法比传统算法具有更高的系统容量和吞吐量,更小的平均访问时延.Based on the adaptive multi-rate（AMR） speech codec in IEEE 802.16 systems, an uplink scheduling algorithm is proposed for voice over IP （VoIP） services. The algorithm sends special codedivision multiple access （CDMA） code in the channel quality indication （CQI） channels to request bandwidth during the silence period of users. The performance of the proposed strategy in terms of system capacity, throughput, delay and signaling overhead of system are analyzed. Simulations are implemented. Through the theoretical analysis and simulation results. It shows that it not only increases the system capacity and throughput but also reduces the average access delay compared with the conventional algorithms.

关 键 词：IEEE802.16系统 上行调度算法 IP语音业务 自适应多速率语音编码器 码分多址码 

分 类 号：TN915.65[电子电信—通信与信息系统]