带宽节省的多路径传输协议动态分包算法

摘要

随着移动互联网和多接口技术的发展,并行多路径传输已成为当前的研究热点,然而现有的机制存在带宽资源浪费问题.首先通过实验分析的方法,发现传输过程中的分包大小对带宽资源利用率存在较大的影响.在此基础上,对数据分包传输过程进行数学建模,分析获得期望最高的带宽资源利用率时应该满足的条件.在所建模型的基础上,设计了一种动态分包算法,能够根据链路的丢包情况,动态调整数据包大小.实验结果表明,与采用固定大小的分包策略相比,所提算法能够有效减少多路径传输中带宽资源的浪费.%With the rapid development of the Mobile Internet and Multi-interface technology,Concurrent Muhipath Transmission (CMT) has been a research hotspot.However,the waste of bandwidth resources is still a challenging problem in CMT.Firstly,it is found that the packet size has a great impact on the utilization of bandwidth resources through experiments.Based on the results of the experiments,a mathematical model about the data transmission process is proposed and the solution to the maximum resource utilization is derived.Based on the derived solution,a dynamic packetization algorithm is designed to achieve flexible scheduling of packet size according to the packet loss rate and bit error rate of the link.Simulation results demonstrate that the designed algorithm outperforms the fixed-size packetization strategy in terms of bandwidth resources utilization.