光突发交换网络特性对TCP性能的影响  

The impact of OBS network's characteristic on TCP performance

作　　者：文爱军[1] 靖杰[1] 刘建平[1] 张卫东[2] 

机构地区：[1]西安电子科技大学综合业务网理论与关键技术国家重点实验室,陕西西安710071 [2]解放军西安通信学院,陕西西安710106

出　　处：《西安电子科技大学学报》2006年第5期748-753,共6页Journal of Xidian University

基　　金：国家自然科学重大基金研究计划面上项目资助(90104012)

摘　　要：TCP/IP分组在光突发交换(OBS)网络的边缘汇聚成突发,突发通过OBS网络交换.为了定量研究TCP性能与汇聚时间的关系,从汇聚时间的角度仿真TCP性能,发现汇聚时间对TCP性能的影响存在门限值,在该门限值以上TCP吞吐量快速下降;同时发现,当丢失的突发中含有3个以上连续传输段时,TCP发端将超时.理论分析了上述过程,验证了仿真结果的准确性.TCP segments are assembled into an OBS burst at the edge of an OBS network. In order to accurately analyze the relationship between assembly delay and TCP throughput, this paper simulates TCP over OBS is simulated focusing on the influence of assembly delay. It is found that there is a threshold of the assembly delay, and only when the delay is larger than the threshold, will the delay severely reduce the TCP thronghput; it is also found that when a lost burst contains more than three continuous segments, the TCP sender will surely work overtime. A theoretical analysis of the above process is made, which proves that the simulation is accurate.

关 键 词：光突发交换 汇聚算法 TCP吞吐量 

分 类 号：TN929.11[电子电信—通信与信息系统]