基于NSE的OBS网络公平性研究  

Study on the fairness of OBS network based on NSE

作　　者：郑国栋[1] 吴龟灵[1] 李新碗[1] 

机构地区：[1]上海交通大学区域光纤通信网与新型光通信系统国家重点实验室,上海200240

出　　处：《信息技术》2010年第7期45-48,共4页Information Technology

摘　　要：分析了TCP流量和UDP流量接入OBS网络的公平性,并提出了一种新的公平性机制:在OBS边缘节点处将TCP分组和UDP分组分别组包,并在核心节点处实行保护TCP分组的丢包策略,有效提高了OBS网络的公平性。在此基础上扩展和改进了原有一台计算机进行NS仿真软件的Emulation功能,搭建了四台计算机构成的联合仿真(Joint Emulation)平台,将真实网络负载分别通过四台计算机中端接入仿真环境中的OBS网络。得到了更加逼近真实的OBS实验数据,有效验证了公平机制和丢包策略。This paper analyzes the fairness of TCP and UDP over OBS network and a new fairness mechanism is proposed： the TCP packets and UDP packets are assembled in the OBS edge node in different BDPs respectively,and the BDP with TCP packets will be protected in the OBS core nodes.This mechanism can improve the fairness index of the OBS network effectively.On this basis,it extends and improves the emulation feature of NS（a network simulation software）,sets up a joint emulation platform by four computers and make real network load to access the OBS network in simulation environment.It gets more realistic data from the experiment and it supports the proposed fairness mechanism more effectively.

关 键 词：公平性 仿真 OBS TCP UDP 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]