摘要
针对无线环境下TCP错误调用拥塞控制算法致使性能下降的情况,提出一种基于误码丢包率监测的无线TCP改进方法。利用显式拥塞通知的路由器配合区分分组丢失性质,在数据发送端采用实时误码丢包率监测,并根据监测结果调整TCP段尺寸。仿真结果表明,改进后的TCP吞吐量在误码率为1E-4时超过TCP_SACK和TCP_Reno近1倍。
In wireless environment,TCP erroneously responds to all losses by invoking congestion control algorithm,which results in degraded end-to-end performance.Concerning this problem,this paper proposed a method of wireless TCP based on monitoring the packet loss rate due to bit error in real-time.The data sender cooperated with the router configured with the function of explicit congestion notification to distinguish the characteristics of packet losses;at the same time,the sender took advantage of the monitor result to adjust the TCP segment size.The simulation results show that the throughput of modified of TCP outperforms TCP_SACK and TCP_Reno by 100% approximately when the bit error rate is 1E-4.
出处
《计算机应用》
CSCD
北大核心
2011年第10期2657-2659,共3页
journal of Computer Applications
关键词
无线TCP
拥塞控制
显式拥塞通知
误码丢包率
TCP段尺寸
wireless TCP
congestion control
Explicit Congestion Notification（ECN）
error packet loss rate
TCP segment size
