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首页> 外文期刊>Journal of network and computer applications >Edge-limited scalable QoS flow set-up
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Edge-limited scalable QoS flow set-up

机译：边缘受限的可扩展QoS流设置

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摘要

Although the Differentiated Services architecture supports scalable packet forwarding based on aggregate flows, the detailed procedure of Quality of Service (QoS) flow set-up within this architecture has not been well established. In this paper we explore the possibility of a scalable QoS flow set-up using a sink-tree paradigm. The paradigm initially constructs a sink tree at each egress edge router using network topology and bandwidth information provided by a QoS extended version of Open Shortest Path First (OSPF), which is a widely used link-state routing protocol. Our sink-tree paradigm dynamically reallocates network bandwidths online according to traffic demands. As a consequence, our paradigm easily supports QoS routing, resource allocation, and admission control at ingress edge routers without consulting core routers in a way that the QoS flow set-up time and overhead are minimized. Simulation results are very encouraging in that the proposed methodology requires significantly less communication overhead in setting up QoS flows compared to the traditional per-flow signaling-based methodology while still maintaining high resource utilization.
机译：尽管“差分服务”体系结构支持基于聚合流的可伸缩数据包转发，但尚未很好地建立此体系结构内的服务质量（QoS）流设置的详细过程。在本文中，我们探讨了使用宿树范式进行可扩展QoS流设置的可能性。该范例最初使用开放式最短路径优先（OSPF）的QoS扩展版本提供的网络拓扑和带宽信息在每个出口边缘路由器上构建宿树，后者是一种广泛使用的链路状态路由协议。我们的宿树范式根据流量需求动态地在线重新分配网络带宽。因此，我们的范例可以轻松地在入口边缘路由器上支持QoS路由，资源分配和准入控制，而无需咨询核心路由器，从而可以最大限度地减少QoS流的建立时间和开销。仿真结果令人鼓舞，因为与传统的基于每流信令的方法相比，所提出的方法在建立QoS流时所需的通信开销大大减少，同时仍保持了较高的资源利用率。

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