Ubiquitous Semantic Space: A context-aware and coordination middleware for Ubiquitous Computing

Abstract

Ubiquitous Computing poses the challenge of I. INTRODUCTION increased communication, context-awareness and functionality. Ubiquitous Computing Environment consists of a large In a highly dynamic and weekly connected ubiquitous number of computational agents and communication devices environment, continuous access to the network (synchronous that seamlessly work together. In order for the agents and communication) is very difficult. So it's necessary to go for tuple devices to function effectively in this environment they need space which provides asynchronous communication without any ' loss in data. Tuple space offers a coordination infrastructure for to perform two kinds of tasks-they need to sense and reason communication between autonomous entities by providing a about the current context in the environment and they need to logically shared memory along with data persistence, interact smoothly with other agents and devices. In this paper, transactional security as well as temporal and spatial decoupling we propose a context-aware and co-ordination middleware for properties that make it desirable for distributed systems [2] such ubiquitous computing environments that meets the two needs as Ubiquitous Computing. of the agents and devices in the environment. Section 2 In order to automate the task and the system to be describes the existing middleware for ubiquitous computing intelligent, context awareness is a must. This can be achieved by and requirements needed to be satisfied by a middleware for using semantic web technology. Existing middleware's for Ubiquitous computing concentrates on RPC communication Ubiquitous computin Sein 3 ibes thcoe of paradigm and deals with context-awareness separately. In our Ubiquitous Semantic Space and how it is suitable for approach of constructing the middleware we provide common developing a middleware for ubiquitous computing. Section 4 solution to both communication and context-awareness using describes our Ubiquitous Semantic Space middleware Ubiquitous Semantic Space. Ubiquitous Semantic Space [5] framework; Section 5 presents our ontological model of brings together tuple space, semantic web technologies and Ubiquitous Semantic Space; Section 6 gives the primitive ubiquitous Computing. Hence in this paper, we introduce a operations that can be made on Ubiquitous Semantic Space context-aware and co-ordination middleware framework for Section 7 explains the usage of our middleware using an eUbiquitous Environment using Ubiquitous Semantic Space. health scenario and Section 8 gives the conclusion and future Ubiquitous Semantic Space uses ontologies to define the semantics of various concepts. Using ontologies facilitates works. different agents in the environments to have a common semantic understanding of different contexts. Ontology is represented using Ontology Web Language, OWL [6]. We have modeled a It is necessary to know the existing work on middleware's Ubiquitous Semantic Space ontology structure suitable for for ubiquitous computing environments. The available ...

PEPCONTEXTUAL: definição de um prontuário eletrônico de paciente ciente de contexto

“…Sudha defende que um grande número de agentes computacionais e dispositivos de comunicação que trabalham em conjunto caracterizam a computação ubíqua [27]. Ainda, Weiser definiu que o relacionamento entre as pessoas e os computadores se tornaria transparente, isto é, as ações aconteceriam da forma mais natural possível, sem que o usuário perceba que está acionando um dispositivo ou uma aplicação [4,28].…”

Context Coupling Techniques for Context-aware Web Service Systems: An Overview

“…This type of coupling is typically achieved by using a common repository to store, manage, and provide context information. The repository can be implemented as a Web service, such as in [26,15,35,27,32,8,37,3], a tuple space, such as in The Ubiquitous Semantic Space (USS) [40], and agents, such as in [18].…”

“…Privacy Multi-organization structure data common message MDE approach + + inContext [41] + + + WS-Context [12] + + USS [40] + + CATIS [37] + + + CASD [21] + ESCAPE [44] + + CA-SOA [20] + + + Akogrimo [8] + + ConServ [26] + + + ERMHAN [36] + Keild et al [29] + 2 summarizes our perspectives on the utilization of context coupling techniques. Overall, structure/data and common couplings offer less complexity and effort for the implementation but the interoperability degree is low, while message coupling is complex but offers better interoperability degree.…”