SSG中基于优先级自适应队列管理机制研究

为了保证业务选择网关个性化的服务性能,需要相应的队列管理机制具有多优先级等支持QoS控制的特性.通过分析WRR鲁棒性差、不能有效处理突发流的缺点,设计了自适应的加权轮循算法,并利用网络仿真软件NS2分析了算法性能.该算法基于动态部分缓冲共享和成比例轮询进行分组调度的思想,能够根据网络中的实际流量动态分配缓存和调整调度次数,提高了缓存利用率和算法鲁棒性.将其应用于业务选择网关中体现了有差别地服务要求.

Priority-based Adaptive Queue Management Mechanism in SSG

In order to assure the performance of Service Selection Gateway(SSG), the Queue Management Mechanism is required to provide various QoS guarantees. In this paper, an adaptive weighted round robin algorithm is proposed to improve the efficiency of the WRR under burst traffic environment. Its implementation is also introduced, followed by the analysis of its performance. The proposed scheme has adaptability by distributing resources and changing schedule times dynamically. When used in SSG, AWRR can distribute the finite resources according to the grade of users and the characteristics of traffics, and provide different services.