Uplink VoIP Scheduling for AMR Speech Codec in IEEE 802.16 Systems

doi:10.13190/jbupt.200903.100.wangll

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2009, Vol. 32 ›› Issue (3): 100-103.doi: 10.13190/jbupt.200903.100.wangll

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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

Abstract

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

References

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Uplink VoIP Scheduling for AMR Speech Codec in IEEE 802.16 Systems

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