CAJ | 학술논문

IP DiffServ 已经被IETE标准化,并由于其实现简单和易于扩展被作为IP QoS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IP DiffServ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offset time的OBS QoS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BF类提供很好的业务区分.
IP DiffServ 이경피IETE표준화,병유우기실현간단화역우확전피작위IP QoS적일충호적해결판법.제출료일충신적광돌발교환망락지지IP DiffServ적망락체계결구,칭위DS-OBS,병급출료망락결구、변연절점화핵심절점적공능모형、공제포격식、입구절점적회취산법화핵심절점적조도산법.여목전기우offset time적OBS QoS결구불동,제출결구적기본사상시:재입구변연로유기집행업무구분적돌발회취,재핵심절점대불동류적공제포집행불동적매일도행위(PHB)처리,종이실현업무구분.방진결과표명:제출적결구능재단도단연지、탄토량화IP분조주실등대EF류、AF류화BF류제공흔호적업무구분.
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.