摘要
多路径并行传输(CMT)是一个基于流控制传输协议(SCTP)的新传输协议,它使用SCTP协议的多宿特性,在一条端到端偶联中的多条路径上并行地进行数据分发,相对单路径传输具有聚合带宽、可以提高端到端吞吐量的优点.文中针对受限接收缓存下发送窗口是否受接收窗口影响两种情况分别对多路径并行传输进行建模,提出了基于发送窗口和接收窗口关联的CMT吞吐量模型.首先以轮为单位,分别对两种情况下的超时阶段、慢开始阶段和拥塞避免阶段的拥塞窗口进行了分析.其次,综合3个阶段传输情况,得到1个多路径并行传输过程中,稳态吞吐量关于RTT、RTO和丢包率的函数关系,它能够很好地估计多路径并行传输协议在受限接收缓存下稳态吞吐量.最后,通过仿真实验和结果分析验证了多路径并行传输吞吐量模型的有效性和准确度.
Concurrent Multipath Transfer（CMT）is a new transport protocol which uses the Stream Control Transmission Protocol＇s（SCTP）multihoming feature to distribute data across multiple end-to-end paths concurrently in SCTP＇s association,CMT have some advantage of aggregate bandwidth and improve the end-to-end throughput.According to the send window is whether or not affected by the receive window in the presence of bounded receive buffer,we propose a CMT＇s throughput model based on the correlation between send window and receive window in this paper.Firstly,we analyze the congestion window such as timeout stage,slow start stage and congestion avoidance stage in above two cases（namely,the send window is whether or not influenced by the receive window）.Secondly,we propose a math expression of steady-state throughput about RTT,RTO and packet loss rates in CMT,which is able to accurately predict steady-state throughput of CMT in the presence of bounded receive buffer.Finally,simulation results show the effectiveness and accuracy of CMT＇s throughput model.
出处
《计算机学报》
EI
CSCD
北大核心
2015年第3期515-528,共14页
Chinese Journal of Computers
基金
国家杰出青年科学基金(61225012
71325002)
国家自然科学基金(61100021)
东北大学秦皇岛分校校内科研基金(XNK201503)
中央高校基本科研业务费专项资金(N110204003
N120104001)资助~~
关键词
多路径并行传输
吞吐量模型
发送窗口
接收窗口
受限接收缓存
concurrent multipath transfer
throughput model
send window
receive window
bounded receive buffer
