泛在网下基于上下文感知的虚拟终端技术研究  

Research on Virtual Terminal Technology Based on Context-aware in Ubiquitous Network

作　　者：余雪勇[1] 唐城[1] 朱晓荣[1] 

机构地区：[1]南京邮电大学通信技术研究所,江苏南京210003

出　　处：《计算机技术与发展》2013年第6期245-248,共4页Computer Technology and Development

基　　金：国家科技重大专项基金资助项目(2011ZX03005-004-03);江苏973项目(BK2011027);江苏省2011年普通高校研究生科研创新计划项目(CXLX11_0401);南京邮电大学青蓝计划项目(NY210033)

摘　　要：泛在网络环境下,业务提供必须根据网络和终端条件、用户偏好的变化而自适应地变化。因此,文中阐述了虚拟终端中的上下文感知功能,其为泛在多样性业务的开发提供了不可或缺的信息来源。提出一种应用于虚拟终端系统的上下文感知中间件体系结构,该中间件可以将各类应用场景中终端环境的特征参数进行抽象,形成可获知、可描述的上下文。提出应用该上下文感知技术的业务应用模型。最后通过一个多媒体业务接续场景对上述定义、抽象方法和业务模型进行验证。结果表明,该方法可以有效地为泛在多样性业务提取所需的上下文信息;通过该模型,业务平台和多构终端环境可以进行动态适配,为用户提供多样性和最佳体验的服务。In ubiquitous network environment,the service provider must adaptively change as the network and terminal＇ s condition, and the user＇ s preference change. Therefore, a context-aware function of virtual terminal is described, which could provide essential information support for ubiquitously various services. A middleware based on context-aware which is suitable for virtual terminal systems is provided, which could abstract feature parameters of terminal environment for all kinds of service scenarios, and form retrievable and formalized contexts. Furthermore, a service model based on the contextaware is given. Finally, the proposed abstract definition method and service model are verified by a typical multimedia service scenario. The results show that the method can extract the context required by ubiquitously various service. Based on the model, service platform can adapt to heterogeneous terminal environments dynamically, and provide various and best experience services for users.

关 键 词：泛在网 虚拟终端 上下文感知 中间件 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]