Computer Engineering and Applications ›› 2011, Vol. 47 ›› Issue (19): 97-100.
• 网络、通信、安全 • Previous Articles Next Articles
ZHANG Bo,ZHANG Chunye,MA Xiaoqiang,YANG Shiqiang
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张 波,张春业,马小强,杨士强
Abstract: IEEE 802.16 standard supports real time and non-real time services at each node.However,it has flexibility to develop customized scheduling algorithms according to different priority-based traffic’s Quality of Service(QoS) requirements,so it is imperative to obtain optimum scheduling schemes for different kinds of traffic.In order to improve performance of end-to-end delay,a hybrid Scheduling algorithm(EDD along with WFQ) for QoS is proposed.The simulation results show that the proposed algorithm in a node gives less delay for real time services instead of EDD used only,also makes a BS accommodate more number of SSs with the given parameters,and scheduling schemes from Base Station(BS) to Subscriber Station(SS) like Grant Per SS(GPSS) impacts less delay than Grant Per Connection(GPC).
Key words: IEEE802.16, Grant Per Subscribe Station(GPSS), Grant Per Connection(GPC), Earliest Due Date(EDD), Weighted Fair Quoue(WFQ)
摘要: IEEE802.16标准在每个节点处都提供实时业务和非实时业务。由于基于优先级的业务的服务质量(QoS)的需求不同,因此需要对传统的调度算法进行改进使其具有更大的适应性。为了改善QoS端到端时延的性能,提出了一种混合调度算法(EDD和WFQ算法相结合)。仿真结果表明:在每个节点处,提出的混合算法比仅使用EDD算法能给实时业务产生的时延更少,并且还能够使单个BS在可允许的端到端时延范围内容纳数量更多的子SS,而且使用从BS到SS的GPSS模式的调度机制比使用GPC模式能产生更小的时延。
关键词: IEEE802.16, 给予单连接模式, 给予单服务站模式, 最先到达时间算法, 加权公平队列算法
ZHANG Bo,ZHANG Chunye,MA Xiaoqiang,YANG Shiqiang. Improved scheduling algorithm design for QoS in IEEE 802.16[J]. Computer Engineering and Applications, 2011, 47(19): 97-100.
张 波,张春业,马小强,杨士强. IEEE 802.16中改进的QoS调度算法设计[J]. 计算机工程与应用, 2011, 47(19): 97-100.
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http://cea.ceaj.org/EN/Y2011/V47/I19/97