RTX-PW：一种基于路径权值的CMT重传策略

摘要

According to the problem that partial path transmission is better than the full path when there is a big difference in the quality of the path in concurrent multipath transfer (CMT )environment ,the fitting relationship of the path average throughput , packet loss rate and delay is established .A retransmission strategy named RTX-PW using path weight is proposed ,and this strategy can decrease the receive buffer block and improve the throughput of concurrent multipath transfer .Finally ,simulation results show the performance of RTX-PW outperforms that of the traditional retransmission strategies of RTX -CWND and RTX-SSTHRESH .%针对多路径并行传输（CMT ）情况下当路径质量存在较大差异时，部分路径传输优于全部路径的问题，建立了路径的平均吞吐量与丢包率和延迟的拟合关系，提出了一种基于路径权值的CMT重传策略-RTX_PW ，该策略可有效减缓接收缓存阻塞，提高多路径并行传输的吞吐量。最后，仿真结果表明RTX_PW的性能优于传统重传策略RTX-CWND和RTX-SSTHRESH 。