SUPANET中多粒度服务质量保障机制研究

Research on Multi-granularity QoS Guarantee Mechanism in SUPANET

下一代互联网NGI(Next Generation Internet)既需要为单个业务连接提供细粒度的服务质量QoS(Quality of Service),又需要为一类业务流提供粗粒度的QoS。针对这种多粒度的QoS保障需求,在分析单物理层用户数据传输与交换平台体系结构SUPA(Single physical layer User-data transfer&switching Platform Architecture)原有QoS保障机制的基础上,提出在SUPA网络中为Internet业务流提供多粒度QoS保障的基本框架,设计了Internet业务流与多粒度虚通道的映射方式以及粗虚通道的配额自适应算法,最后通过仿真实验对配额自适应算法进行了验证。仿真实验结果说明:配额自适应比固定配额算法更能提高单个粗虚通道的配额利用率以及全网资源的利用率。

The Next Generation Internet （NGI） must provide not only fine granularity Quality of Service （QoS） guarantee to a single flow, but also coarse granularity QoS guarantee to a class of flow. To meet the need of NGI in multi-granularity QoS guarantee, this paper describes the original QoS guarantee mechanism of SUPA （Single physieal layer User-data transfer ~ switching Platform Architecture ） and proposes an Internet traffic oriented multi-granularity QoS guarantee framework in SUPA. In this framework, a mapping method between Internet traffic and the multi-granularity Virtual Tunnel （VT） is proposed, and an adaptive quota algorithm of thick VT is designed. At last, the effectiveness of the algorithm is proved by simulation. Simulation results show that the adaptive quota algorithm can improve the quota utilization rate of single thick VT and the resources utilization rate of the whole network in comparision with the fixed quota algorithm.