CAJ | 학술논문

为了在MPLS网络中提供对单流的高质量服务,提出了一种基于网络的、供应方的区分服务标记方法.在数据流进入网络前按交换路径进行逐点的接入控制,再将许可的资源预留作为流状态安装在入口路由器上.在传输时,数据流在入口路由器按资源预留标记为预留内/预留外,网络节点按不同的标记队列进行区分处理.该方法提出按预留带宽标记数据流,将基于单流的资源预留定量地映射为基于行为聚合的PHB标记,实现了从集成服务到区分服务的融合.其一方面避免了拥塞,提供了对单流的定量服务质量保证;另一方面无须在核心路由器安装流状态和实现流管理,保持了区分服务的可扩展性.
위료재MPLS망락중제공대단류적고질량복무,제출료일충기우망락적、공응방적구분복무표기방법.재수거류진입망락전안교환로경진행축점적접입공제,재장허가적자원예류작위류상태안장재입구로유기상.재전수시,수거류재입구로유기안자원예류표기위예류내/예류외,망락절점안불동적표기대렬진행구분처리.해방법제출안예류대관표기수거류,장기우단류적자원예류정량지영사위기우행위취합적PHB표기,실현료종집성복무도구분복무적융합.기일방면피면료옹새,제공료대단류적정량복무질량보증;령일방면무수재핵심로유기안장류상태화실현류관리,보지료구분복무적가확전성.
For providing per flow QoS guarantee in MPLS networks, this paper proposed a supply side DiffServ marking method based on network dynamic. Before entering the network, individual stream requested a per-hop admission control along the delivery path and installs flow-specific reservation on ingress router as flow state. Marked stream packets into reserved/unreserved profile on ingress node according the flow reservation, and had a differentiated processing based on PHB at later nodes. It marked individual stream as its reservation, maped flow-based reservation into quantitative behavior-based marks, and finally combined IntServ and DiffServ. This method, on the one hand, avoids collision and provides quantitative per flow QoS guarantee, on the other hand, keeps DiffServ scalable without any per flow management on core routers.