一种提高Freeze-TCP性能的增强机制

提出了一种提高传输控制协议(TCP)在移动网络中性能的方案Freeze-TCP .Freeze-TCP 基于原有的Freeze-TCP协议,并在其中引入了网络测量机制.当发生网络切换后,数据发送者不是立刻发送整个窗口中的数据,而是根据首先进行的网络测量结果设置慢启动门限,从慢启动阶段开始发送数据.本方案很好地解决了Freeze-TCP在异种网络切换时出现的由于数据突发导致的数据丢失或者不能及时有效利用网络带宽的问题.网络仿真表明,Freeze-TCP 能够在发生任意情况的异种网络切换时,提高Freeze-TCP的性能.

An Enhancement to Freeze-TCP to Improve Its Performance

A scheme called (Freeze-TCP+) is presented to improve the performance of transmission control protocol (TCP) in mobile environment. Freeze-(TCP+) is based on Freeze-TCP and incorporates network measurement mechanism. Data sender in Freeze-(TCP+) would not send all the packets in the window immediately as it does in Freeze-TCP when handover occurs but set its slow start threshold to a measurement result and start to transmit packets from slow start phase. Freeze-(TCP+) solve the problems that Freeze-TCP faces when handover occurs in heterogeneous networks, (i.e.,) many packets are lost due to burst transmission or the resources in the new network can not be utilized efficiently. Network simulation shows that Freeze-(TCP+) can improve the performance of Freeze-TCP whatever kinds of handover occur.