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电子学报  2012 

支持WiMAX节点灵活休眠的两阶段可靠多播策略

DOI: 10.3969/j.issn.0372-2112.2012.08.009, PP. 1552-1557

Keywords: 节能,可靠数据传递,IEEE802.16e标准,多播

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Abstract:

节能是无线网络的一个重要课题.针对IEEE802.16e标准第2类节能模型中监听窗口长度固定会导致一些空闲移动站因得不到及时休眠而浪费能量这一不足,该文提出"两阶段可靠多播策略",让基站在第1阶段多播数据包,在第2阶段对第1阶段丢失的数据包进行网络编码并重播.该策略让移动站一旦空闲就进入休眠,实现了时延约束下数据包的可靠传递.仿真试验表明,该策略可以降低能耗,且移动站的占空比、能耗、吞吐率、丢包率等指标均优于传统的重传与确认方案.

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