一种综合缓存管理和主动队列管理的区分服务节点机制  

A Node Mechanism of Differentiated Services Combining Buffer Managementand Active Queue Management

作　　者：李锁钢[1] 吴建平[1] 徐恪[1] 

机构地区：[1]清华大学计算机科学与技术系,北京100084

出　　处：《电子学报》2005年第5期847-851,共5页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60303006;No.60203025);973基金(No.2003CB314801)

摘　　要：　随着网络和应用的飞速发展,Internet不仅要提供尽力转发(BestEffort)的服务,还要支持各种传输类型和多个优先级的QoS服务.目前普遍认为区分服务体系机构是很有前途的提供QoS保证的Internet框架,而网络节点机制是其关键技术之一.我们提出了一种在网络节点上实现的区分服务机制comBAQ(combiningBufferManagementandActiveQueueManagement),它综合了适当的缓存管理和主动队列管理方法.我们详细介绍了它的服务框架和分组处理判决算法,实验模拟结果显示,它能满足我们提出来的五个设计目标,可以在网络节点上实现多个丢失优先级的区分服务:为需要可靠传输的多媒体应用提供"有保证"服务,为传统TCP传输提供"无保证"服务.<Abstrcat>With the rapid development of networks and applications,Internet is required to not only provide the Best Effort service,but also supply services of various traffic classes and multiple priorities.DiffServ architecture is considered to be the promising Internet framework meeting QoS requirements.One of crucial elements in DiffServ is the network node scheme.In this paper,we propose a novel DiffServ node mechanism called combining Buffer Management and Active Queue Management (comBAQ).We detail comBAQ service framework and its packet judgment process.Simulation results demonstrate that comBAQ is capable of simultaneously achieving our five targets and provides service differentiation in terms of packet drop priority:the More Guaranteed (MG) service for reliable traffics and the Less Guaranteed (LG) service for traditional application flows.

关 键 词：区分服务 缓存管理 动态阈值 主动队列管理 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]