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基于MDP的群组时延约束的IEEE802.15.4随机接入控制算法

DOI: 10.13190/j.jbupt.2015.04.016, PP. 76-80

Keywords: IEEE,802.15.4,马尔可夫决策过程,群组时延敏感业务,群组时延约束

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Abstract:

为保证群组时延敏感业务的传输时间限制,提出了基于马尔可夫决策过程(MDP)的群组时延约束随机接入控制算法.与现有文献对保证单个数据包时延或平均包时延的研究不同,以分组的整体时延为研究对象,且首次将群组时延约束作为该类业务的服务质量指标.该算法动态估计介质访问控制层参数和MDP决策门限,权衡当前最大回报和未来可能更大的回报制定传输策略.终端选择性地参与信道资源竞争,缓解数据突发造成的信道拥塞.仿真结果表明在业务负荷较大时,所提算法更能有效保证群组时延敏感业务的服务质量需求.

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