APS-FeW适用于无线网络的TCP增强方案

TCP enhancements for APS-FeW applying wireless network

TCP的控制隐含了一个假设，即分组丢失都是由网络拥塞引起的，而这一点对于无线网络不成立。因此在无线情况下，会引入了冗余控制，使得传输性能下降。浮点窗口算法（FeW）通过限制TCP的分组注入量，减少冗余控制，在此基础上，提出了改进方案自适应包长算法（APS）。仿真数据表明，基于FeW的APS算法（APS-FeW）比FeW算法提升了10％～25％的吞吐量。

TCP＇s implicit assumption that any packet loss is due to congestion is not valid any longer in mobile ad hoc networks. It is observed that TCP induces the over-action of routing protocol and reduces the performance of the connection. Fraction window increment （FEW） scheme for TCP improves the performance by limiting TCP＇s aggressiveness. But to some extent, this limitation is too strict. To solve this problem, an adaptive packet size （APS） scheme to work on top of FeW is presented. The extensive simulation results demonstrate that APS over FeW outperforms FeW alone by 10% - 25%.