IEEE 802.16系统中针对AMR语音编码器的上行VoIP调度

doi:10.13190/jbupt.200903.100.wangll

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (3): 100-103.doi: 10.13190/jbupt.200903.100.wangll

IEEE 802.16系统中针对AMR语音编码器的上行VoIP调度

王立磊;徐惠民

北京邮电大学信息与通信工程学院

收稿日期:2009-01-04 修回日期:2009-02-20 出版日期:2009-06-28 发布日期:2009-06-28
通讯作者: 王立磊

Uplink VoIP Scheduling for AMR Speech Codec in IEEE 802.16 Systems

Received:2009-01-04 Revised:2009-02-20 Online:2009-06-28 Published:2009-06-28

摘要/Abstract

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，提出了一个新的上行调度算法。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，并且做了仿真实验。从理论分析和仿真结果可以看出：新算法可以比传统算法增加系统容量和吞吐量，减少平均访问时延。

关键词: IEEE 802.16 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

Abstract:

A new uplink scheduling algorithm is proposed for voice over IP (VoIP) services, which is based on the adaptive multi-rate speech codec in IEEE 802.16 systems. This algorithm sends the special Code-Division Multiple Access (CDMA) code in the channel quality indication (CQI) channels to request bandwidth during the silence period of users. Then the performance of the proposed strategy in terms of system capacity, throughput, delay and signaling overhead of system is analyzed. And simulation experiments are implemented. Through the theoretical analysis and simulation results, the new algorithm shows that it not only increases the system capacity and throughput but also reduces the average access delay compared with the conventional algorithms.

Key words: IEEE 802.16 systems, uplink scheduling algorithm, VoIP, AMR speech codec, CDMA code

王立磊;徐惠民. IEEE 802.16系统中针对AMR语音编码器的上行VoIP调度[J]. 北京邮电大学学报, 2009, 32(3): 100-103.

参考文献

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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

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