多跳Ad Hoc网络中TCP性能的改进研究分析

摘要

The original TCP was designed for wire network. Its congestion control fact mechanism assumes that all packet loss is caused by congestion. However various factors influence the TCP performance in the Ad Hoc networks, which involves many layers of network architecture. The TCP' s poor performance in Ad Hoc is due to the Ad Hoc character. It first analyzes several major causes for the decline of TCP performance in Ad Hoc networks,based on the protocol layer.it analyzes the effect on TCP performance caused by each layer, then on the basis of understanding present improvement proposals, many present typical cross-layer improvement proposals that improve TCP performance are analyzed and compared. This laies the foundation for the future research work.%传统TCP是为有线网络设计的,它的拥塞控制机制是假设丢包都是由网络拥塞引起的,然而影响Ad Hoc网络中TCP性能的因素是多方面的,涉及到网络体系结构里面多个层次之间的问题.由于Ad Hoc网络的特性使得传统TCP的性能急剧下降,文中首先分析了Ad Hoc网络中影响TCP性能的主要因素,从协议层入手,分析了各协议层对TCP性能的影响；然后,在对现有改进方案了解的基础上分析比较了目前改善Ad Hoc网络中TCP性能的具有典型的跨层改进方案,为将来的研究工作打下了基础.