无线传感器网络主动QoS机制研究

无线传感器网络是目前国际上的一个研究热点,但是对其Q oS问题和中间件的研究却才刚刚开始。在分析无线传感器网络基本问题的基础上,提出了一种基于中间件的,面向应用、状态和角色的无线传感器网络主动QoS方案,并对其设计思想、结构形式、工作过程、信息交互和状态评价等关键问题进行了研究。同传统QoS机制相比,主动QoS方案设计了一个应用和网络之间的反馈协商机制,并通过对应用和网络的动态调节,使网络满足应用对QoS的最低要求,或者在降低应用对QoS要求的情况下,使网络最大限度地支持应用,从而更好地保证了应用的完成并延长了网络生命期。

Research on Active QoS Mechanism of Wireless Sensor Networks

Wireless Sensor Networks(WSN)is a hotspot in international research,but the discussion about QoS and middleware of WSN just begins recently.After the analyses of essential problems of WSN,this paper brings forward an Active QoS Mechanism(AQM)based on middleware,which is application,state and role-oriented,and some key points of AQM which includes the thinking of design,infrastructure,procedure of working,information exchange and state evaluation are studied.Different from traditional QoS mechanisms,a feedback and negotiation mechanism between applications and networks are designed in AQM,and by using the active regulation mechanisms of applications and networks,the networks can adapt themselves to the lowest QoS requirements of applications,or the networks can support the applications furthest by depressing the QoS requirements of applications.So,the execution of applications is guaranteed better,and the lifetime of networks is prolonged at the same time.