基于丢包事件统计的TCP-Veno改进算法  

Enhanced TCP-Veno algorithm based on packet loss statistic

作　　者：胡愚 陈元琰[1] 

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9期2980-2983,共4页Computer Engineering and Design

基　　金：广西自然科学基金项目(0728099)

摘　　要：针对TCP-Veno在轻负载网络环境中不能有效利用带宽,在重负载网络环境中不能准确区分拥塞丢包和无线随机丢包而造成频繁拥塞等问题,提出一种改进算法TCP-Veno+。通过对一定时间段内拥塞丢包事件和无线随机的丢包事件的数量统计,计算两种不同类型丢包事件的发生概率,在此基础上改进原TCP-Veno的丢包区分算法,提高了丢包区分的准确性。仿真实验结果表明,改进算法在无线异构网络中提高了网络传输性能,同时具有较好的公平性和稳定性。To solve the problems of some studies have pointed out that for TCP-Veno at light load network environment can not use the bandwidth effectively,while under the heavy load network environment can not accurately distinguish between congestion loss and wireless random packet loss,which result in frequent congestion and other troubles.An improved algorithm called TCP Veno＋ is proposed.Based on the statistic data of the congestion packet loss event and wireless random packet loss event in a certain period,the probability of the two different loss events are computed respectively.Then it is used to modify the loss differentiation algorithm of original TCP-Veno to improve the loss distinguishing accuracy.The simulation results show that the improved algorithm in heterogeneous wireless networks has good performance,fairness,and stabilityp.

关 键 词：无线网络 TCP-Veno 拥塞 丢包 统计 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]