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针对无线网络中机会网络编码的性能约束问题,重点研究了COPE(完全机会编码)协议的优化策略.利用CXCC(跨层协作拥塞控制)的逐跳拥塞控制和可靠传输功能,设计了一种面向单播数据流的结合拥塞控制的机会网络编码优化方案.该方案采用跨层设计的思路,使用CXCC代替原MAC层的确认重传的功能和传输层的拥塞控制功能,并对无线信道中的数据包进行监听.通过仿真分析,验证了该方案能够很好地适应无线网络的广播特性,并有效增加无线网络的吞吐量.
Focusing on the performance constraint of opportunistic network coding in wireless networks, the optimization strategy of COPE is studied emphatically.Using the congestion-hopping control and reliable transmission function of CXCC (Cross-layer Cooperative Congestion Control) Unicast data flow combined with opportunistic network coding optimization scheme of congestion control.This scheme adopts the idea of cross-layer design, uses the CXCC to replace the function of acknowledgment and retransmission of the original MAC layer and the congestion control function of the transport layer, Data packets to monitor.A simulation analysis shows that this scheme can adapt well to the broadcast characteristics of wireless networks and effectively increase the throughput of wireless networks.