基于往返延迟抖动区分丢包的TCPW改进  

TCPW improvement based on round-trip delay jitter loss differentiation

作　　者：冯伟[1] 陈元琰[1] 王斌[1] 胡愚 

机构地区：[1]广西师范大学计算机科学与信息工程学院,广西桂林541004

出　　处：《计算机工程与设计》2011年第4期1203-1206,共4页Computer Engineering and Design

基　　金：广西自然科学基金项目(0728099);广西研究生教育创新计划基金项目(2010106020821M61)

摘　　要：针对TCP Westwood(TCPW)在高误码率无线网络环境下不能区分无线丢包和拥塞丢包的问题,提出了一种基于往返延迟抖动区分丢包的TCPW改进协议,称之为TCPWBJ。它根据测得的往返延迟抖动划分拥塞等级,区分无线丢包和拥塞丢包,并根据拥塞等级进行相应的拥塞控制。仿真结果表明,TCPW BJ算法在高误码率无线网络中,显著提高了带宽利用率和吞吐量,并保持良好的公平性与友好性。In high bit error rate wireless network environment TCP Westwood（for short TCPW） could not differentiate the wireless packet losses from the congestion packet losses.So,a new TCP scheme called TCPW BJ is proposed,which is based on round-trip delay jitter loss differentiation and is a revision of TCP Westwood.It divided network status into different congestion levels by the mea-sured round-trip delay jitter.According to congestion levels,it differentiated the wireless packet losses from the congestion packet losses and carried on the appropriate congestion control.The experiments show that in high bit error rate wireless networks TCPW BJ algorithm significantly improves bandwidth utilization and throughput,and maintains the fair and friendly behavior with respect to other TCP flows.

关 键 词：往返延迟抖动 误码率 区分丢包 无线丢包 拥塞丢包 

分 类 号：TN915.04[电子电信—通信与信息系统]