基于拥塞控制的机会网络编码性能优化  

Performance optimization of opportunistic network coding based on congestion control

作　　者：尚涛[1] 黄福华[1] 郭正宇[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《华中科技大学学报（自然科学版）》2013年第S1期339-342,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重点基础研究发展计划资助项目(2012CB315905);国家自然科学基金资助项目(61272501);北京市自然科学基金资助项目(4132056)

摘　　要：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.To solve the performance restriction of opportunistic network coding in wireless network, the optimization strategies of the COPE(complete opportunity encoding)protocol was researched.An improved scheme of COPE with congestion control for unicast flows was presented by means of the hop-by-hop congestion control and reliable transmission of congestion control protocol CXCC(cooperative cross-layer congestion control).By using the idea of cross-layer design,it replaced the automatic repeat request function in the MAC layer and congestion control function in the transport layer with CXCC,and made CXCC overhear data in wireless channel.Through simulation analysis,the proposed scheme is verified that it can adapt to wireless environment well and effectively increase the throughput of wireless network.

关 键 词：网络编码 无线网络 机会编码 拥塞控制 性能优化 吞吐量 

分 类 号：TN911.22[电子电信—通信与信息系统]