A new weighted fair queueing algorithm is proposed, which uses the novel flow-based service ratio parameters to schedule flows. This solves the main drawback of traditional weighted fair queneing algorithms- the packe...A new weighted fair queueing algorithm is proposed, which uses the novel flow-based service ratio parameters to schedule flows. This solves the main drawback of traditional weighted fair queneing algorithms- the packet-based calculation of the weight parameters. In addition, this paper proposes a novel service ratio calculation method and a queue mangement technology. The former adjusts the service ratio parameters adaptively based on the dynamics of the packet lengths and thee solves the unfairness problem induced by the variable packet length. The latter improves the utilization of the server＇s queue buffer and reduces the delay jitter through restricting the buffer length for each flow.展开更多
文中针对包头市某铁路通信网络中的交换机性能问题展开研究,分析了该公司通信网络的现状及铁路调度系统的高性能需求,提出了基于软件定义网络(Software Defined Network,SDN)的交换机性能优化方法。所提方法通过控制平面的流表优化和智...文中针对包头市某铁路通信网络中的交换机性能问题展开研究,分析了该公司通信网络的现状及铁路调度系统的高性能需求,提出了基于软件定义网络(Software Defined Network,SDN)的交换机性能优化方法。所提方法通过控制平面的流表优化和智能负载均衡、数据平面的队列调度优化和转发性能改进,实现交换机全方位升级。测试结果显示,所提方法能够明显改善时延、抖动、吞吐量、丢包率等关键指标,更好地满足了铁路通信网络业务的需求,可为类似网络环境的性能优化提供参考。展开更多
基金National Natural Science Foundation of China ( No.60572157)Sharp Corporation of Japanthe Hi-Tech Research and Development Program(863) of China (No.2003AA123310)
文摘A new weighted fair queueing algorithm is proposed, which uses the novel flow-based service ratio parameters to schedule flows. This solves the main drawback of traditional weighted fair queneing algorithms- the packet-based calculation of the weight parameters. In addition, this paper proposes a novel service ratio calculation method and a queue mangement technology. The former adjusts the service ratio parameters adaptively based on the dynamics of the packet lengths and thee solves the unfairness problem induced by the variable packet length. The latter improves the utilization of the server＇s queue buffer and reduces the delay jitter through restricting the buffer length for each flow.
文摘文中针对包头市某铁路通信网络中的交换机性能问题展开研究,分析了该公司通信网络的现状及铁路调度系统的高性能需求,提出了基于软件定义网络(Software Defined Network,SDN)的交换机性能优化方法。所提方法通过控制平面的流表优化和智能负载均衡、数据平面的队列调度优化和转发性能改进,实现交换机全方位升级。测试结果显示,所提方法能够明显改善时延、抖动、吞吐量、丢包率等关键指标,更好地满足了铁路通信网络业务的需求,可为类似网络环境的性能优化提供参考。
