(OMDNC)-D-2: Opportunistic Max(2)-Degree Network Coding for wireless data broadcasting
(OMDNC)-D-2: Opportunistic Max(2)-Degree Network Coding for wireless data broadcasting
复制标题
OM2DNC：用于无线数据广播的机会最大 2 度网络编码
DOI：
10.1016/j.comcom.2016.02.013
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发表时间：
2016
影响因子：
6
通讯作者：
Xie Wei
中科院分区：
文献类型：
--
作者：
Tian Hui;Xu Kui;Wang Jian;Xu Youyun;Zhang Dongmei;Xie Wei
在无线广播系统中，通常采用多次重传来保证每个分组的正确接收。传统的混合式自动重传请求协议每个时隙重传一个数据包。因此，为了正确接收到所有的报文，需要进行大量的重传，导致频谱效率较低。在本文中，我们提出了一种基于机会max2度网络编码（OM2DNC）的无线广播（WBC）协议。具体来说，为了减少重传的总次数，在接入节点上通过执行最大度网络编码（NC）将不同用户设备（ue）的丢失包合并在一起。然后，利用基于最大度的机会重传协议广播NC组合数据包。在每个终端上，使用所提出的联合网络递归系统卷积解码器可以恢复丢失的数据包。理论分析和仿真结果表明，所提出的基于OM2DNC的WBC协议的平均传输数性能优于传统的基于NC的WBC协议。
In wireless broadcasting systems, multiple retransmissions are commonly employed to guarantee the correct reception of each packet. The traditional hybrid automatic retransmission request protocol retransmits one packet per slot. Hence, a large amount of retransmissions is required to correctly receive all the packets, which leads to low spectrum efficiency. In this paper, we propose an Opportunistic Max2-Degree Network Coding (OM2DNC) based wireless broadcasting (WBC) protocol. Specifically, to reduce the overall number of retransmissions, lost packets of different user equipments (UEs) are combined by performing Max-Degree network coding (NC) at the access node. Then, NC combined packets are broadcasted by utilizing the Max-Degree based opportunistic retransmission protocol. At each UE, the lost packet can be recovered by using the proposed joint network recursive systematic convolution decoder. Theoretical analyses and simulation results show that the average number of transmissions performance of the proposed OM2DNC based WBC protocol outperforms that of the traditional NC based WBC protocols.