CoRET: A Network Coding Based Multicast Retransmission Scheme for Mobile Communication Networks
CoRET: A Network Coding Based Multicast Retransmission Scheme for Mobile Communication Networks
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DOI：
10.1109/icc.2011.5962911
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发表时间：
2011-06
期刊：
影响因子：
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通讯作者：
Hao Wu;Jun Zheng
中科院分区：
文献类型：
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作者：
Hao Wu;Jun Zheng
本文提出了一种基于网络编码的重传（CoRET）方案，用于支持移动通信网络中的多播服务。 CoRET引入网络编码，采用基于汉明距离的数据包选择算法来选择数据包进行编码，以提高重传性能的效率和可靠性。仿真结果表明，CoRET能够比现有的重传方案Random Pick获得更好的重传性能。此外，还建立了数学模型来分析编码为重传数据包的原始数据包数量（即编码数量）对重传性能的影响，以找到能够实现最佳性能的最佳编码数量。数值结果表明，对于可靠的传输信道，较小的编码数可以获得更好的性能，而对于不可靠的信道，则优选较大的编码数。
This paper proposes a network Coding based RETransmission (CoRET) scheme for supporting multicast service in mobile communication networks. CoRET introduces network coding and employs a Hamming distance based packet selection algorithm to select packets for encoding in order to improve the retransmission performance in terms of efficiency and reliability. Simulation results show that CoRET can achieve better retransmission performance than an existing retransmission scheme, Random Pick. Moreover, a mathematical model is developed to analyze the impact of the number of original packets encoded into a packet for retransmission (i.e., encoding number) on the retransmission performance in order to find an optimal encoding number that can achieve the best performance. Numerical results show that for a reliable transmission channel a smaller encoding number can achieve a better performance while for an unreliable channel a larger encoding number is preferred.