改进的WiMAX上行链路调度机制

Improved uplink scheduling scheme for WiMAX

基于IEEE802.16e协议的实时业务调度机制,以及对VoIP业务特性的分析,提出了一种改进的上行链路调度机制,该调度机制自适应地调整数据带宽分配周期。从理论上分析了所提出的调度机制和已有调度机制的VoIP用户容量。系统仿真结果表明,在保证系统容量的前提下,所提出的调度机制可以有效地降低用户的上行时延,从而提高了服务质量。

Based on the real-time traffic scheduling scheme in IEEE 802.16e and the characteristic of VoIP,an improved uplink scheduling scheme is proposed,which adaptively adjusts the uplink bandwidth allocation period.Theoretical analysis illustrates the system capacity of VoIP user for the proposed scheduling scheme along with the existing scheduling schemes.System level simulations are presented to show that this scheme can effectively reduce the users＇ uplink delay and improve the quality of service under the premise of ensuring system capacity.