摘要
鉴于IEEE802.16标准中未对接纳控制机制提出定义,为了提高系统带宽利用率,在分析现有无线网络接纳控制技术的基础上,结合IEEE802.16的具体机制提出了一种基于业务优先级的接纳控制算法。相比于先到先服务的接纳机制,该算法严格区分业务优先级,为不同优先级业务预留带宽,以保证实时业务的服务质量(QoS)要求。利用NS2网络模拟软件对算法进行了仿真和性能评估。结果表明,本接纳控制算法可以较好地保障高优先级业务的实时性,同时在重负载情况下系统带宽利用率有了明显提高。
In consideration of that there have no admission control scheme within the scope of the standard of IEEES02.16, in order to improve utility of bandwidth, this paper analyzes admission control algorithms in wireless networks, and studies the QoS mechanism in IEEE802.16, then proposes the priority-based admission control algorithm. Compared with first come and first served scheme, the algorithm discriminate the priority of service so as to meet the QoS requirement of real-time services. NS2 network simulator is used to emulate the performance of the algorithm. And the simulation results show that this priority- based algorithm ensure the QoS of the high-priority services better, at the same time the utility of bandwidth is improved obviously in the case of heavy load.
出处
《电子设计工程》
2012年第9期61-63,67,共4页
Electronic Design Engineering
基金
榆林学院高层次人才科研启动基金项目(09GK032)
