绿色路由器的低功耗FIS转发机制及其能耗分析  

A Low-Power FIS Mechanism and Energy Analysis for Green Router

作　　者：袁博[1] 戴艺[2] 汪斌强[1] 

机构地区：[1]国家数字交换系统工程技术研究中心郑州450002 [2]国防科学技术大学计算机学院长沙410073

出　　处：《计算机研究与发展》2014年第5期984-996,共13页Journal of Computer Research and Development

基　　金：国家“九七三”重点基础研究发展计划基金项目(2012CB315900);国家“八六三”高技术研究发展计划基金项目(2009AA01A334,2008AA01A325);国家自然科学基金项目(61003301)

摘　　要：随着互联网的发展,现有路由器体系结构在性能、复杂性和节能等方面存在许多难以克服的问题,如何实现高效节能的转发机制是绿色高性能路由器设计面临的重大挑战.基于边交换边转发思想提出一种边转发边交换(forwarding in switching,FIS)机制,通过模糊转发流水交换减少了路由器转发和交换阶段的存储需求和访存次数.该机制复用多个低速节点构成多级流水线结构,通过低成本执行部件的规模化运行提高交换性能和IP查找速率,可降低报文查表交换的硬件实现复杂度.建立了先转发后交换(forwarding before switching,FBS)机制和FIS机制的能耗模型,使用不同模型模拟内部缓存、输入输出端口等具有不同结构的节点,仿真实验证明FIS机制比现有的FBS机制减少约12.5%的能耗.提出的分析模型适用于可扩展和绿色节能路由器的设计.With the development of the next generation Internet, the existing router architecture faces many problems, such as performance, complexity and power consumption. With the increasing of network size, how to implement a low-power forwarding is a challenge in green and high-performance router design. In this paper, we consider building a FIS mechanism based on forwarding in switching idea. The memory requiring and accessing are reduced by blurredly forwarding and piping switching. The multilevel line framework in FIS is made by many slow processing units. It can obtain higher performance and lookup speed through cosmically running. Simultaneously, it can reduce the complexity of hardware implementation. Energy model of FIS and FBS is established. We propose different modeling methodologies for node switches, internal buffers and interconnect wires inside switch fabric architectures. In this paper four switch fabric architectures are analyzed under different traffic throughput and different numbers of ingress/egress ports. Experiments using real-life routing tables demonstrate that our FIS solution can reduce the power of routing lookup by 12.5% than FBS clearly. This framework and analysis can be applied to the architectural exploration for low power high performance network router designs.

关 键 词：低功耗 绿色路由器 路由转发 路由查表 能耗分析 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]