基于QoS域代理在移动无线互联网中区分服务的设计与实现

QoS Domain Agent based Differentiated Services in Mobile Wireless Internet

随着用户数和应用业务的快速发展,对新一代Internet的服务质量提出了更高的要求。然而,在Internet中引入无线接入方式使得提供QoS面临更大挑战。文章基于区分服务(DiffServ)框架结构,并结合移动管理协议———移动IP(MobileIP)协议来研究和解决如何在新一代移动无线互联网中提供QoS控制。同时在每个自治域中引入一个新的概念———QoS域代理(QoSDomainAgent,QDA),并利用QDA进行资源管理并参与和移动主机/用户(MobileHost,MH)或其它QDA进行动态SLS的协商,同时采用组播方式把QDA中的QoSSLS内容信息传输给域内的每一个第一跳和边界路由节点。通过对相关协议和功能进行必要的修改和扩充,从而有效地解决了MH和网络的动态服务级别协议(SLA)的协商和在MobileIP切换中各入口节点动态建立SLS的问题,同时可以有效减少信令交互,节省无线资源和减少移动终端的电池消耗,并且有利于MH在域内漫游时进行无缝切换。最后给出作者的结论及进一步的研究内容。

With the rapidly expanding of users and applications it is expected that the next generation of Internet will support applications with high Quality of Service(QoS).This paper have a research of QoS control based on DiffServ ar-chitecture RFC2475 in mobile wireless Internet using Mobile IP by premising a flexible mobile DiffServ architecture,with addi tionally introducing a terminology of QoS Domain Agent (QDA),which acts as resources manage server and participate in dynamic SLS negotiation with mobile hosts(MH)or with other QDAs if needed.By taking advantage of the mechanisms proposed in this document ,the dynamic SLS and Mobile IP handover can be handled efficiently with less signaling(power and resources save)and seamless handover when MHs roaming within a DS domain.Lastly,we give our conclusion and bring out some issues we should consider in future study.