基于随机网络编码的k-RNARQ重传策略

摘要

Combining the idea of random network encoding,A k-RNARQ retransmission method was designed and introduced into wireless sensor networks based on the loss of data packet.When the number of loss packets at the receiving node reached the threshold set in the method,missing data packets were retransmitted by the means of random combination of encoding.The method reduced the complexity of the receiving encoding,and allowed more data packets to participate in encoding,which kept the integrity of the information.Simulation results show that on the premise of transmitting data packets correctly,the method can reduce the number of data packets and improve transmission performance.%在无线传感器网络数据传输过程中,结合随机网络编码的思想,设计一种基于丢失数据包分批重传的k-RNARQ重传策略.通过设置一定的丢包阀值k,当接收节点丢失数据包的数目达到设定的阀值数目k时,运用随机编码将这批丢失的数据包进行编码组合重传.该策略在降低接受节点编码复杂度的同时,可以让更多的数据包参与编码,有效保证信息的完整性.仿真结果表明,在保证数据包正确传输的前提下,与现有重传策略相比,该策略可以减少数据包的传输次数,提高传输性能.