面向异构网络的并行传输乱序分析

摘要

文中对异构网络环境下多径并行传输引发的数据包乱序问题进行了深入研究,分析了造成数据包乱序的相关因素,提出了一种基于端到端时延累积概率分布的数据包乱序分析模型.该模型在现有的研究基础之上,增加了发送端队列时延对数据包乱序的影响,提高了模型的准确性.然后利用该模型推导出了数据包有序传输的约束条件和多径并行传输中数据包乱序概率计算公式.仿真结果表明,该模型解出的数据包乱序概率曲线与仿真曲线基本符合,验证了模型的有效性.%This peper studied on multipath parallel transmission of packet reordering based on the heterogeneous network environment, analyzed the related factors causing packet reordering, proposed a method based on end-to-end delay cumulative probability distribution of data packet reordering model.Based on the existing research, the model increases the influence of queue delay on the packet reordering and improves the accuracy of the model.Then, the constraint conditions for the orderly transmission of data packets and the formula of random order probability of data packets in multipath parallel transmission are derived by using the model.The simulation results show that the random order probability curve of the model is basically consistent with the simulation curve, and the validity of the model is verified.