一种新的IPDiffServoverOBS网络体系结构及性能分析(英文)  

New framework and performance evaluation for IP DiffServ over OBS networks

作　　者：隆克平[1] Rodney S.Tucker 王重钢[3] 

机构地区：[1]重庆邮电学院光互联网及无线信息网络研究中心,重庆400065 [2]澳大利亚墨尔本大学超宽带信息网络研究中心 [3]香港科技大学

出　　处：《重庆邮电学院学报（自然科学版）》2004年第2期1-6,66,共7页Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition)

基　　金：国家自然科学基金项目 (90 3 0 40 0 4);国家"863"高新技术项目 (2 0 0 3 AA1 2 1 540 );重庆市科委应用基础项目;重庆市教委项目 (0 50 3 0 9)联合资助~~

摘　　要：IPDiffServ已经被IETF标准化,并由于其实现简单和易于扩展被作为IPQoS的一种好的解决办法。提出了一种新的光突发交换网络支持IPDiffServ的网络体系结构,称为DS-OBS,并给出了网络结构、边缘节点和核心节点的功能模型、控制包格式、入口节点的会聚算法和核心节点的调度算法。与目前基于offsettime的OBSQoS结构不同,提出结构的基本思想是:在入口边缘路由器执行业务区分的突发会聚,在核心节点对不同类的控制包执行不同的每一跳行为(PHB)处理,从而实现业务区分。仿真结果表明:提出的结构能在端到端延迟、吞吐量和IP分组丢失等对EF类、AF类和BE类提供很好的业务区分。IP Differentiated Services (DiffServ) has been standardized by the IETF and is considered as a promising IP QoS solution due to its scalability and ease of implementation. In this paper, we present a novel framework for IP DiffServ over optical burst switching (OBS), namely, DS-OBS. We present the network architecture, functional model of edge nodes and core nodes, the control packet format, a novel burst assembly scheme at ingress nodes and scheduling algorithm of core nodes. The basic idea is to apply DiffServ capable burst assembly at ingress nodes and perform different per hop behavior (PHB) electronic treatment for control packets of different QoS classes service at core nodes. Simulation results show that the proposed schemes can provide the best differentiated service for expedited forwarding (EF), Assured forwarding (AF) and best effort (BE) service in terms of end-to-end delay, throughput and IP packet loss probability.

关 键 词：IP服务质量 区分服务 每一跳行为 光突发交换 突发会聚 

分 类 号：TN929.1[电子电信—通信与信息系统]