摘要
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。
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.
出处
《计算机应用研究》
CSCD
北大核心
2010年第4期1422-1426,共5页
Application Research of Computers
基金
国家自然科学基金资助项目(60703114)
国家"863"计划资助项目(2007AA01Z443)
国家教育部博士点基金资助项目(20070614008)
四川省科技支撑计划资助项目(2009GZ0004)
关键词
服务质量
区分服务
标记
预留内/预留外
quality of service（QoS）
DiffServ
marking
reserved/unreserved
