信息中心网络内数据重传算法的优化

Optimization of data retransmission algorithm in information centric networking

对于信息中心网络(ICN)中原始数据恢复机制的网络带宽利用率低下的问题,提出一种基于网络编码的实时数据重传(NC-RDR)算法。首先,根据网络的实时状态对网络中丢失的数据包进行统计;然后,将网络编码结合到信息中心网络中,对统计的丢失的数据包进行组合编码;最后,将编码后的数据包重传发送给接收端。对提出的方案进行分析,仿真结果表明,与基于网络编码的多播数据恢复(NC-MDR)算法相比,在传输带宽(平均传输次数)方面,降低了约30%,因此,在信息中心网络中,该算法能有效地减少网络重传次数,提高网络传输效率。

Aiming at the problem of low network bandwidth utilization rate of the original data recovery mechanism in Information Centric Networking(ICN),a Network Coding based Real-time Data Retransmission(NC-RDR)algorithm was proposed.Firstly,the lost data packets in the network were counted according to the real-time status of the network.Then,network coding was combined into ICN,and the statistical lost data packets were combinatorially coded.Finally,the encoded data packets were retransmitted to the receiver.The simulation results show that compared with NC-MDR(Network Coding based Multicast Data Recovery)algorithm,in the transmission bandwidth aspect,the average number of transmissions was reduced by about 30%.In ICN,the proposed algorithm can effectively reduce the number of data re-transmissions,improveing network transmission efficiency.