Weight Pick: an efficient packet selection algorithm for network coding based multicast retransmission in mobile communication networks

Weight Pick: an efficient packet selection algorithm for network coding based multicast retransmission in mobile communication networks
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Weight Pick:移动通信网络中基于网络编码的多播重传的高效分组选择算法

DOI:
10.1007/s11276-012-0472-x
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发表时间:
2011-09
期刊:
影响因子:
3
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:
Qiang Hu;Jun Zheng

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为了提高移动通信网络中基于网络编码的组播重传协议的效率,提出了一种高效的分组选择算法——权重选择算法。与现有的分组选择算法不同,权重选择在执行网络编码时引入了动态组合数的概念。基于该概念,基站根据用户当前接收报文的状态动态确定重传报文中组合或编码的报文数,每个重传报文的组合数可以不同。在数据包选择中,权重选择试图为每个用户找到一个权重不小于(C−1)的编码组合,其中ecs是该重传数据包的组合号。仿真结果表明,与现有的选包算法相比,weight pick在丢包率和包传输延迟方面都能显著提高重传性能。
This paper proposes an efficient packet selection algorithm, calledWeight Pick, for improving the efficiency of a network coding based multicast retransmission protocol in mobile communication networks. Unlike existing packet selection algorithms,Weight Pickintroduces the concept of a dynamic combination number in performing network coding. Based on this concept, a base station dynamically determines the number of packets combined or encoded in a retransmission packet based on the current packet receiving status of users and the combination number for each retransmission packet can be different. In packet selection,Weight Pickattempts to find an encoding combination whose weight is not less than (C− 1) for every user, whereCis the combination number of that retransmission packet. Simulation results show thatWeight Pickcan significantly improve the retransmission performance as compared with existing packet selection algorithms in terms of both packet loss ratio and packet transmission delay.
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