基于移动环境的TCP协议改进方案

针对移动环境中TCP性能下降的问题，提出了一种端到端的基于ROMIPv4的TCP改进方案——TCP-BROMIPv4．该方案利用ROMIPv4中的绑定更新消息以及新增的切换警告消息，调整发送TCP在移动节点切换过程中的操作．仿真结果表明，TCP-BROMIPv4缩短了移动环境下的业务中断时间，增加了发送的分组数量，从而提高了网络吞吐量．

Modification on TCP for Mobile Environments

To improve the performances of TCP (transfer control protocol) in mobile environments, an end-to-end solution was proposed based on ROMIPv4 (route optimization in mobile internet protocal version 4), which is named as TCP-BROMIPv4. In this solution, sender TCP may adjust its operation when it is switching to a new node if it receives a binding update message and a handoff warning message. Simulation results show that TCP-BROMIPv4 shortens the traffic interrupted time and increases the number of packets transfered, greatly raises the throughput of TCP in mobile networks .