Relay Scheme Based on Distributed Luby Transform Codes for InterPlaNetary Internet  

行星际互联网中基于分布式LT码的新中继策略(英文)

作　　者：苟亮 张更新 边东明 薛峰 胡婧 

机构地区：[1]Institute of Communication Engineering, PLA University of Science and Technology [2]No. 73602 of PLA

出　　处：《China Communications》2013年第10期1-11,共11页中国通信（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.61032004;the National High Technology Research and Development Program of China (863 Program) under Grants No.2012AA121605,No.2012AA01A503,No.2012AA01A510

摘　　要：Distributed Luby Transform （DLT） codes have been proposed to improve the robustness and system throughputs for multisource single-sink networks by exploiting the benefits of Network Coding （NC） at a single relay. All the proposed schemes such as the DLT and Soliton-Like Rateless Coding （SLRC） have attempted to maintain Robust Soliton Distribution （RSD） or Soliton-Like Distribution （SLD） for the output data at the relay. This rzsult in some source symbols to be discarded, thereby degrading the throughput. In this paper, we have proposed a novel method called the Full DLT （FDLT） coding scheme to be applied in the InterPlaNetary （IPN） Internet scenario comprising two sources and one relay The aim of the proposed scheme is to fully utilise the source symbols so as to reduce the overheads and improve energy efficiencies at the sources while maintaining low overhead at the relay. In addition, almost no buffer is needed in the proposed scheme so the relay can have limited storage space, and the proposed scheme is resilient to the churn rates of the nodes. The simulation results have shown that the proposed scheme outperforms the aforementioned schemes with respect to source overheads and total overhead in addition to preserving the benefits of NC and LT codes.Distributed Luby Transform(DLT)codes have been proposed to improve the robustness and system throughputs for multisource single-sink networks by exploiting the benefits of Network Coding(NC) at a single relay. All the proposed schemes such as the DLT and Soliton-Like Rateless Coding(SLRC)have attempted to maintain Robust Soliton Distribution(RSD) or Soliton-Like Distribution(SLD) for the output data at the relay. This result in some source symbols to be discarded,thereby degrading the throughput. In this paper, we have proposed a novel method called the Full DLT(FDLT) coding scheme to be applied in the InterPlaNetary(IPN) Internet scenario comprising two sources and one relay.The aim of the proposed scheme is to fully utilise the source symbols so as to reduce the overheads and improve energy efficiencies at the sources while maintaining low overhead at the relay. In addition, almost no buffer is needed in the proposed scheme so the relay can have limited storage space, and the proposed scheme is resilient to the churn rates of the nodes. The simulation results have shown that the proposed scheme outperforms the aforementioned schemes with respect to source overheads and total overhead in addition to preserving the benefits of NC and LT codes.

关 键 词：DLT codes Network Coding relay networks decoding overhead 

分 类 号：TN911.2[电子电信—通信与信息系统]