基于喷泉码的多跳中继通信

Multi-hop Relay Communications Based on Fountain Codes

针对远距离多跳传输网络中传输数据量大、时延长、损耗大、接收信噪比低,以及反馈信息传输时延大、丢失率高的问题,采用喷泉码进行多跳中继传输,并提出了三种基于喷泉码的多跳中继传输协议。这些协议充分利用了喷泉码的无速率特性和纠删特性,结合中继网络能够提高传输可靠性的优点,提出了基于RNC编码和LT编码的多跳中继传输协议。对协议的传输性能进行了理论分析和仿真评估。由分析和实验验证结果可知,在进行方案和协议选取时,要综合考虑节点能量、工作模式、处理能力等多方面因素,研究最佳方案和协议组合,以实现高效可靠的远程多跳中继信息传输。

To deal with the problems of long delay,high loss,low SNR and no feedback information in multi-hop relay networks,multi-hop relay scheme and protocols based on fountain codes are proposed.Making use of the rateless property and erasure property of fountain codes,combined with the advantage of relay network in improving transmission reliability,the multi-hop relay protocols based on Random Network Coding（ RNC） and LT code are proposed.Theoretical analysis and simulation of the transmission performance and delay of each protocol are made.The analysis and simulation results indicate that the residual energy,work mode and processing ability should be considered comprehensively in the selection of these protocols to realize efficient and reliable transmission in multi-hop relay networks.