A Pervasive Computing Environment Based on SIP

Abstract

Land), to address the above issues and to realize the vision of pervasive computing environment. Pervasive Computing environment represents a mobile andThe users of FULL include end-user, application distributed environment. This brings the challenges for developer, and service developer. FULL must make the enduser/device mobility, context awareness, services manage-user query services easily and transparently invoke ment and invocation. In this paper, we propose a prototype of heterogeneous services. For application developer, FULL will pervasive computing environment based on SIP to provide provide a unified interface to establish specific application by solutions of these challenges and to bring the vision into using services which are implemented by various mechanisms. reality. The architecture ofFULL is divided into four layers. And for service developer, he can individually choose one of network layer, service layer, middleware layer and the various service management protocols and invocation application layer. The structure and implementation of these methods that FULL supports to build the service. four layers are described in detail. Finally, a comparison to In section 2 of this paper, we describe the architecture other projects is given.overview of FULL and the design purpose of the four layers. In section 3, we dilate on the components of each layer. 1. INTRODUCTION Implementation detail is described in section 4. We finally conclude and compare with other projects in section 5. According to [1], the vision of pervasive computing can be formed by a new view of devices, applications, and 2. OVERVIEW OF FULL environment. First, a device is a portal into an application/data space, not a repository of custom software Conceptually, applications find and use services via managed by the user. Second, an application is a means by middleware, and network platform deals with the commuwhich a user performs a task, not a piece of software that is nication between services. Network platform provides written to exploit a device's capabilities. Third, the mobility management, session initiation, and network computing environment is the user's information-enhanced integration. User can access the resource on network anytime, physical surroundings, not a virtual space that exists to store anywhere. Services under different mechanisms coexist on and run software.FULL. Middleware deals with service manage-ment which In such a vision, pervasive computing environment includes discovering services registered by different provides the user to aware and use surrounding information. mechanisms and invoking services by its invocation method. The entity that provides information is called service. The Applications complete their tasks by invoking services in issues of service presence, service discovery, and service various mechanisms. invocation must be solved. Today, several existing mechanisms have been proposed to overcome the obstacle, such as UDDI [5], JINI [6], and so on. This brings the new challenges of the interactio...