异构网络中丢包识别研究综述

The Research of Loss Differentiation Algorithm in Heterogeneous Networks

异构网是将具有不同媒体、不同性能的子网统一构建成的单个逻辑网络,在这种网络中随着信道的变化丢包事件会更频繁地发生,同时丢包的原因比单一网络环境更加复杂,为有线环境设计的传统TCP不能满足应用的要求,因此改进TCP协议成为异构网中研究的热点。本文在研究各种TCP协议的基础上,深入分析了其中丢包识别这一关键问题,概括了丢包识别的一般性策略,然后对典型的区分丢包原因的方法进行了归纳和比较,最后提出了通过丢包控制提高异构网性能的研究方向,为各种环境下TCP协议的改进提供了较好的研究基础。

As the development of computer network, a single logical overlay network composed of many heterogeneous networks is becoming popular, The key difference of these networks is more loss event as channel characters changes frequently and loss cause is much more complicated than the single network. The traditional TCP protoeol is designed for wire circumstance and is evidently poor in such circumstance, Then it is becoming a hot area in heterogeneous networks to evaluate TCP protocol. Studying various TCP protocols, especially the key problem of loss differentiation, we summarize the general strategies for loss differentiation algorithm and analysis some kinds of approaches on loss differentiation. We then give the research directions of how to control losses and improve the TCP performance, which is necessary for further study on TCP improvement over heterogeneous networks.