Telecommunications Science ›› 2015, Vol. 31 ›› Issue (4): 98-105.doi: 10.11959/j.issn.1000-0801.2015089

• research and development • Previous Articles     Next Articles

An Improved Retransmission Approacb Based on Opportunistic Network Coding in Multicast Networks

Pengfei Shao1,3,Yanwei Zhao2,Yaohui Wu3,Xinwei Yao1   

  1. 1 College of Computer Science & Technology,Zhejiang University of Technology,Hangzhou 310023,China
    2 College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310023
    3 School of Electronic and Information Engineering,Zhejiang Wanli University,Ningbo 315100,China
  • Online:2015-04-15 Published:2015-04-15
  • Supported by:
    The National Natural Science Foundation of China;Ningbo Natural Science Foundation;Ningbo Social Development Foundation;Ningbo Innovation Team Foundation

Abstract:

A novel opportunistic-network-coding-based retransmission approach was proposed.According to the feedback on packet loss from the receiving nodes,this novel approach can not only efficiently select a combination of lost packets through Hash lookup for packet retransmission,but also can ensure priority retransmission making up to a single combination retransmission packet which can maximize the number of receiving nodes for recovering their lost packets.Furthermore,the proposed approach fully exploits the coding opportunity based on neighborhood association,and allows the receiving nodes to recover their lost packets from multiple retransmission packets.The simulation results show that this novel approach can effectively reduce the number of retransmissions to improve the transmission efficiency with respect to the existing algorithms.

Key words: wireless multicast, network coding, opportunistic network coding, retransmission,optimal scheme

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