Abstract: In this paper，an enhanced uplink scheduling algorithm for VoIP services in IEEE 802.16 systems is proposed.it is an algorithm based on voice activity detect and the BS assigns uplink resources to the SSs considering voice state transitions of the SSs.This algorithm can solve the problems caused by the conventional algorithms，such as waste of uplink resource，MAC overhead and additional access delay.In this paper，the author analyzes and simulates the system throughput and the access delay of conventional algorithm and the proposed algorithm respectively，and show that the proposed algorithm is superior in view of throughput and system capacity.

摘要： 提出了一种应用于IEEE 802.16系统的改进的VoIP服务上行链路调度算法，此算法是一种基于语音活动检测的调度算法，BS根据SS的语音状态转换来分配上行链路资源。它可以弥补传统的调度算法中的一些不足，例如对上行链路资源的浪费、增大MAC负载和引入附加的接入时延等。就系统的吞吐量和接入时延两方面分别对传统的算法和提出的算法作了具体地分析和仿真，结果表明，提出的算法在吞吐量和系统容量方面具有更优的性能。