A Middleware for Context-Aware Agents in Ubiquitous Computing Environments

Ranganathan, Anand; Campbell, Roy H.

doi:10.1007/3-540-44892-6_8

Cited by 184 publications

(155 citation statements)

References 18 publications

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“…In Ranganathan and Campbell (2003), a context-aware middleware for a ubiquitous computing environment is presented. It is part of Gaia (Roman and Campbell, 2002), an infrastructure for smart spaces.…”

Section: Context Framework Databases and Middlewarementioning

confidence: 99%

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Middleware and architectures for space-based and situated computing

Cristea

Dobre

Costan

et al. 2011

IJSSC

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Situated computing is an actual research area that gathers the knowledge and investigation in mobile, wearable, ubiquitous and augmented computing. The aim is to sustain systems that collect information about contexts and user actions over a period of time and supply it to applications that dynamically adapt to context changes. Situated computing systems have various architectures, but most of them include a middleware layer that supports equipment with limited computing resources and offers functionalities that simplify applications development, deployment, execution, and maintenance. Middleware and architectures are the focus of this paper, which presents the main concepts, research results, and future trends in middleware for situated computing. Service oriented, event driven, agent-based, and peer-to-peer architectures are discussed. Middleware issues for situated computing, embedded devices, autonomic space management, proactive services, context awareness, and smart spaces are tackled as well.

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Section: Context Framework Databases and Middlewarementioning

confidence: 99%

“…As an alternative, a query interface can be used to allow applications interrogate the current situation when they need it (Hull et al, 1997). In both cases, a common model of context must be defined, together with a unique associated semantic of contextual information (Ranganathan and Campbell, 2003).…”

Section: Introductionmentioning

confidence: 99%

Middleware and architectures for space-based and situated computing

Cristea

Dobre

Costan

et al. 2011

IJSSC

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“…Users specify care policies using a Policy Wizard. Sensor wrappers gather raw sensor data from sensors, convert them into entity properties (similar to the sensor wrappers in [7]), and store them into a knowledge base. The context server performs further reasoning based on facts in the knowledge base, and generates high-level context information.…”

Section: Architecture Of Actuator Discovery and Invocationmentioning

confidence: 99%

“…In particular, ontologies have been used to model context and reason in pervasive computing environments [7,5,8]. [11] presents a user interface level context model for assistive living.…”

Section: Related Workmentioning

confidence: 99%

An Ontology-Based Actuator Discovery and Invocation Framework in Home Care Systems

Wang

Turner

2009

Lecture Notes in Computer Science

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Abstract. Home care systems need to be personalised to meet individual needs, and must be easily adjusted as the user's symptoms develop. Care policies (i.e. Event-Condition-Action rules) can be used to specify care services, facilitating changes in the behaviour of a home care system. Context modelling allows a user to specify the trigger and conditions of a care policy, using high-level context rather than raw sensor data. The actions of a care policy are, however, still dependent on the implementations details of actuators. We propose a framework that allows the actions of a care policy to be specified abstractly using human-understandable concepts. The framework takes care of discovering and using specific actuators, hiding the low-level home networking details from ordinary users. It therefore makes personalisation and modification of home care systems more accessible to ordinary users, requiring very little technical knowledge.

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“…Context-awareness system collects, analyses and utilizes context. It is necessary for system to be context-awareness in ubiquitous environment [2].…”

Section: Introductionmentioning

confidence: 99%

Intelligent Context-Awareness System Using Improved Self-adaptive Back Propagation Algorithm

Zha

You

et al. 2007

Software Technologies for Embedded and Ubiquitous Systems

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Abstract.Since the context plays a significant role in ubiquitous computing environment, many researches have studied about context-awareness system to improve the performance. An efficient learning mechanism is in importance of context-aware system, but there are seldom algorithms focused on convenience of systems by elaborating the learning mechanism with user's context information. As one of the most adaptable algorithm, Back Propagation provides us favorable inference capability. In this paper, we concentrate on improving the predict ability and reducing the system workload by proposing improved selfadaptive back propagation algorithm. The middleware we proposed improves the predicate capability. Thus, the overall performance becomes better than other systems. By adding system cache to middleware, it is possible for the context-aware system to act faster and improve the workload efficiency. Experiments show that there is an obvious improvement in overall performance of the context-awareness systems.

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A Middleware for Context-Aware Agents in Ubiquitous Computing Environments

Cited by 184 publications

References 18 publications

Middleware and architectures for space-based and situated computing

Middleware and architectures for space-based and situated computing

An Ontology-Based Actuator Discovery and Invocation Framework in Home Care Systems

Intelligent Context-Awareness System Using Improved Self-adaptive Back Propagation Algorithm

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