A Bi-direction Flow Control Mechanism Improving the Transfer Performance of Wireless Network
Weifeng Sun · Dianzi xuebao · 2006
In order to solve the problem that performance of TCP is reduced due to higher bit error rate and bandwidth asymmetry in wireless networks,we put forward a Bi-direction Flow Control mechanism(BFC).It controls traffics in two directions.In the forward channel,according an explicit ACK notification BFC adjusts data rate by cooperating multi-layer protocols.In the reverse one,we developed an ACK flow control algorithm that adjusts self-adaptively ACK rate according to congestion status of two channels.The results of the simulation experiments show that BFC has dramatically improved the performance of TCP over wireless/wired hybrid links.Particularly,in the networks with higher asymmetric factor,BFC has significant contribution.