一种基于机会式网络编码的高效广播重传方法

A High Efficiency Retransmission Approach Based on Opportunistic Network Coding

为了提高无线广播网络中数据传输的效率,该文提出了一种新颖的基于机会式网络编码的重传方法。将机会式网络编码技术应用于丢包的重传,并采用高效的丢包组合策略生成重传包。根据网络终端的丢包情况,首先创建丢包的哈希表,再根据哈希表快速选择满足一定编码条件的丢包以生成重传数据包,从而在提高重传性能的同时,有效地降低了重传方法的复杂度。仿真结果表明该方法相比已有算法能有效地减少重传次数,并提高重传包发送和接收的效率。

A novel retransmission approach based on Opportunistic Network Coding（ONC） is proposed to improve the transmission efficiency in wireless broadcast scenario.The ONC is applied to the retransmission of lost packets,and an efficient combination strategy is introduced to generate the retransmission packet.According to the packet loss information of terminals,a Hash table is built,on the basis of which the lost packets are selected in a certain way to generate the retransmission packet rapidly.So the proposed approach can improve the performance of retransmission and reduce the complexity effectively.The simulation results show that the proposed approach can reduce the number of retransmission,and improve the efficiency of packet retransmission and retrievement compared with existing approaches.