OBS中TCP业务的分段指示拥塞控制策略  

A Stage-Based Congestion Notice Strategy on TCP over OBS

作　　者：田张志[1] 王文国[1] 吴国栋[1] 晁瑞兰[1] 刘春艳[1] 

机构地区：[1]曲阜师范大学计算机科学学院,山东日照276826

出　　处：《计算机技术与发展》2008年第9期76-78,82,共4页Computer Technology and Development

基　　金：国家人事部高层次留学人员回国工作资助项目(国人部发[2004]61号)

摘　　要：传统的TCP拥塞控制算法主要是针对电通信网络中包交换机制提出的,当这种拥塞控制算法应用到光突发交换(OBS)中会出现很多问题,甚至会使网络性能急剧恶化。为了改善传统的TCP拥塞控制算法在OBS网络中的性能,提出了一种分段指示拥塞控制技术,它能根据光网络链路的占用情况,在OBS边缘节点随机地标记不同TCP流的数据包以阻止网络拥塞。该方法不仅能对网络拥塞迅速地做出反应,而且还能应对OBS的假超时现象(FTO),进一步改善OBS网络的性能。Traditional TCP congestion control algorithm mainly aimed at packets based communication network, when it is implemented in OBS network there will be series of new problems and may even degrade the performance of the OBS network. A three- stage- indication method is first proposed to improve congestion situations of TCP traffic in an OBS network. The technology can randomly mark different TCP flows in OBS horder router in order to avoid congestion. It can not only respond quickly when congestion occurs, but also detect the false time- out phenomena,and therefore lead to better performance of the OBS network.

关 键 词：光突发交换 TCP 拥塞控制 SWARM仿真 

分 类 号：TN915.04[电子电信—通信与信息系统]