使用EHN+机制提高移动网络中TCP性能

Using EHN+ Mechanism to Improve TCP Performance in Wireless Networks

TCP 协议是一种在因特网上广泛使用的端到端可靠传输协议,移动网络中无线链路的高误码率(BER)和越区切换导致了 TCP 性能严重降低。在本文中,我们分析了切换过程中 TCP 遇到的问题,着重考察了 TCP 从高可用带宽链路切换至低可用带宽链路时遇到的问题,并根据 EHN 机制提出了 EHN+机制,解决了 TCP 从高可用带宽链路切换至低可用带宽链路时出现的超时重传导致 TCP 在切换过程中性能下降的问题,提高了 TCP 在切换时的可靠性和性能,并给出了模拟结果。

TCP is a popular Internet protocol for reliable end-to-end data delivery.The wireless high BER link and handover across cell degrade the TCP performance in mobile networks.In this paper,we explore the problem about TCP connections handover from higher available bandwidth link to lower available bandwidth link.We present EHN +mechanism to improve TCP reliability and performance when TCP connections switch from higher available band- width link to lower available bandwidth link.Additionally,we execute simulations using NS and give the results.