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.
Network coding is a method that promises to achieve high throughput for multicast streaming in wireless mesh network.However,it comes with two problem: delay and unfairness.We aim at solving this two problem.A effective multicast streaming mechanism in wireless mesh network(EMSM) is presented in this paper.EMSM control the unfairness baesd on the credit of node,and apperceives the decode capability of node,and selects destination set effectively.The unfairness of the node who has good channel is depressed.The system-wide delay is reduced by dual queue mechanism and native packets selecting mechanism in router.Simulation results show that the proposed scheme can achieve low delay,and the unfairness of tht good and bad channel is solving.