机会调度模式下的嵌套码研究
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摘要
将机会调度模式引入嵌套码体系,通过各个收发节点与中继节点的信道状况自适应调整嵌套码的码速率,可以增加信道状况好的链路传输的数据量,提升无线网络的整体吞吐量。仿真结果表明,相比传统非机会调度嵌套码而言,机会调度嵌套码能够有效提升网络吞吐量和误比特性能。
This paper introduces the concept of opportunistic scheduling in a nested coding system. In this scheme, adaptive rate nested codes are used according to channel conditions in order to increase the transmission load of the link while maintaining a good channel condition. In this way, network capacity is no longer constrained by the worst link, and the overall throughput of wireless networks is increased. Simulation shows that compared to traditional non-opportunistic scheduling nested coding, opportunistic scheduling nested coding increases throughput and reliability of single relay multicast relay networks.
This paper introduces the concept of opportunistic scheduling in a nested coding system. In this scheme, adaptive rate nested codes are used according to channel conditions in order to increase the transmission load of the link while maintaining a good channel condition. In this way, network capacity is no longer constrained by the worst link, and the overall throughput of wireless networks is increased. Simulation shows that compared to traditional non-opportunistic scheduling nested coding, opportunistic scheduling nested coding increases throughput and reliability of single relay multicast relay networks.
引文
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[10]CHANG J,WANG D.and LIN M.Some Extended Results on the Search for Good Convolutional Codes[J].IEEE Trans.Inform.Theory,2997,43(5):1672-1697.doi:10.1109/18.623175
[11]FORNEY G D.The Viterbi Algorithm[J].Proceedings of the IEEE,1973,61(3):268-278
[2]LIN H,LIN Y,and KANG H.Adaptive Network Coding for Broadband Wireless AccessNetwork[J].IEEE Trans.Parallel and Distributed System,2013,244(1):4-18.doi:10.1109/TPDS.2012.101
[3]AMERIMEHR M H and ASHTIANI F.Delay and Throughput Analysis of a Two-Way Opportunistic Network Coding-Based Relay Network[J].IEEE Trans.Wireless Communication,2014,13(5):2863-2873.doi:10.1109/TWC.2014.040914.121461
[4]XIAO L,FUJA T,KLIEWER J,and COSTELLO D.Nested Codes with Multiple Interpretations[C]//40th Annual Conference on Information Sciences and Systems,Waikoloa,HI,USA,2006:851-856
[5]YOMO H and POPOVSKI P.Opportunistic Scheduling for Wireless Network Coding[C]//Proceeding of IEEE International Conference on Communicaitons’07,Jun.2007:5610-5615
[6]FREMGER P,ORTEN P.,OTTOSSON T,and SVENSSON A.Multi-rate Convolutional Codes[M].United Kingdom:Chalmers University of Technology Press,1998
[7]LIN Z and VUCETIC B,Power and Rate Adaptation for Wireless Network Coding with Opportunistic Scheduling[C]//The IEEE International Symposium on Information Theory,Toronto,Canada,2008.
[8]SHARMA S,SHI Y,LIU J,and HOU Y T.Is Network Coding Always Good for Cooperative Communications[C]//Proc.IEEE INFOCOM,San Diego,USA,2010
[9]SHARMA S,SHI Y,HOU Y T,SHERALI H.D,and KOMPELLA S.Optimizing Networkcoded Cooperative Communications via Joint Session Grouping and Relay Node Selection[C]//Proc.IEEE INFOCOM,Shanghai,China,2011
[10]CHANG J,WANG D.and LIN M.Some Extended Results on the Search for Good Convolutional Codes[J].IEEE Trans.Inform.Theory,2997,43(5):1672-1697.doi:10.1109/18.623175
[11]FORNEY G D.The Viterbi Algorithm[J].Proceedings of the IEEE,1973,61(3):268-278