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采用网络编码的方法能够提高无线Mesh网络流媒体组播的吞吐量,但也引发了不公平性和延迟增加的问题.针对这两个问题,提出一种有效的无线Mesh网络流媒体组播策略EMSM.EMSM基于用户积分值来控制信道质量好与差的用户之间的公平性,采用网络编码感知获得节点解码的能力,有效地选择信宿集,降低对信道质量好的用户带来的不公平性.在每个Mesh路由器节点采用双队列机制和有效的原始编码选取策略降低系统延迟.仿真实验结果表明我们提出的EMSM策略不仅降低了系统的延迟,而且质量好与差的信道之间的不公平性得到了很好的解决.
Adopting the method of network coding can improve the throughput of streaming media multicast in wireless Mesh network, but it also causes the problem of unfairness and delay increase.Aiming at these two problems, an effective wireless Mesh network multicast strategy EMSM.EMSM controls the fairness between users with good and bad channel quality based on the user’s integral value, adopts the network coding perception to obtain the ability of node decoding, effectively selects the sink set, and reduces the unfairness to users with good channel quality The system delay is reduced by adopting a dual queue mechanism and a valid original coding selection strategy at each mesh router node.The simulation results show that the proposed EMSM strategy not only reduces the system delay but also does not reduce the delay between good and bad channels Fairness has been well addressed.