Abstract: The network real-time multimedia service's widespread application presented an new challenge to the traditional transport protocol: the deficiency of congestion control mechanism causes UDP to seriously seize the sharing band width of the TCP application, thus reduces the network fairness, even causes network congestion. Based on the characteristic of high error rato in wireless network, a novel TCP friendly congestion control algorithm TFRC-JI was presented in this article, which introduces the latency vibration to distinguish the link congestion from code error, thus different speed control mechanism is feedback to the transmitting end. Simulation experiment result indicated that compared with the traditional TFRC mechanism,the throughput of wireless link is enhanced while TCP friendly also maintaines using TFRC-JI,which suites well for real-time service transmission.

Key words: Wireless network,Congestion control, TFRC,High error rate