Efficient network coding-based multicast retransmission mechanism for mobile communication networks

Efficient network coding-based multicast retransmission mechanism for mobile communication networks
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移动通信网络中基于网络编码的高效组播重传机制

DOI:
10.1049/iet-com.2010.0967
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发表时间:
2012-01
期刊:
影响因子:
1.6
通讯作者:
Jun Zheng
Jun Zheng
中科院分区:
计算机科学4区
文献类型:
--
作者:
Hao Wu;Jun Zheng

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提出了一种基于网络编码的重传(CorET)机制,用于支持移动的通信网络中的组播业务。CoRET引入确定性网络编码以提高重传效率和重传可靠性。为了支持Coret,提出了一对有效的分组选择算法,一个被称为“最少”选择,另一个被称为基于汉明距离(“Hamming-D”)的选择,以在执行网络编码用于重传时选择分组。Most`Least选择具有最多重传请求和最少重传请求的分组,而Hamming-D选择具有最大汉明距离的分组。仿真结果表明,与大多数`最少或Hamming-D的CorRET优于现有的重传方案,`随机挑选',在重传效率和重传可靠性方面。为了使Hamming-D算法达到最佳性能,进一步建立了数学模型,分析了编码成重传数据包的原始数据包个数对重传性能的影响,找到了一个能达到最佳性能的最佳编码数。
This study proposes a network Coding-based RETransmission (CoRET) mechanism for supporting multicast service in mobile communication networks. CoRET introduces deterministic network coding to improve retransmission efficiency and retransmission reliability. To support CoRET, a couple of efficient packet selection algorithms are proposed, one is called `Most`Least` selection and the other is called Hamming distance-based (`Hamming-D`) selection, to select packets when performing network coding for retransmission. Most`Least selects the packets with the most retransmission requests and the least retransmission requests, whereas Hamming-D selects the packets with the largest Hamming distance. Simulation results show that with Most`Least or Hamming-D CoRET outperforms an existing retransmission scheme, `Random Pick`, in terms of both retransmission efficiency and retransmission reliability. To achieve the best performance of the Hamming-D algorithm, a mathematical model is further developed to analyse the impact of the number of original packets encoded into a packet for retransmission on the retransmission performance to find an optimal encoding number that can achieve the best performance.
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