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Article
Publication date: 6 April 2010

Evi Syukur and Seng Wai Loke

Pervasive computing environments such as a pervasive campus domain, shopping, etc. will become commonplaces in the near future. The key to enhance these system environments with…

185

Abstract

Purpose

Pervasive computing environments such as a pervasive campus domain, shopping, etc. will become commonplaces in the near future. The key to enhance these system environments with services relies on the ability to effectively model and represent contextual information, as well as spontaneity in downloading and executing the service interface on a mobile device. The system needs to provide an infrastructure that handles the interaction between a client device that requests a service and a server which responds to the client's request via Web service calls. The system should relieve end‐users from low‐level tasks of matching services with locations or other context information. The mobile users do not need to know or have any knowledge of where the service resides, how to call a service, what the service API detail is and how to execute a service once downloaded. All these low‐level tasks can be handled implicitly by a system. The aim of this paper is to investigate the notion of context‐aware regulated services, and how they should be designed, and implemented.

Design/methodology/approach

The paper presents a detailed design, and prototype implementation of the system, called mobile hanging services (MHS), that provides the ability to execute mobile code (service application) on demand and control entities' behaviours in accessing services in pervasive computing environments. Extensive evaluation of this prototype is also provided.

Findings

The framework presented in this paper enables a novel contextual services infrastructure that allows services to be described at a high level of abstraction and to be regulated by contextual policies. This contextual policy governs the visibility and execution of contextual services in the environment. In addition, a range of contextual services is developed to illustrate different types of services used in the framework.

Originality/value

The main contribution of this paper is a high‐level model of a system for context‐aware regulated services, which consists of environments (domains and spaces), contextual software components, entities and computing devices.

Details

International Journal of Pervasive Computing and Communications, vol. 6 no. 1
Type: Research Article
ISSN: 1742-7371

Keywords

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Article
Publication date: 26 June 2009

Evi Syukur and Javier Garcia-Villalba

371

Abstract

Details

International Journal of Pervasive Computing and Communications, vol. 5 no. 2
Type: Research Article
ISSN: 1742-7371

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Article
Publication date: 26 June 2009

Yue Suo, Jingyu Li, Yuanchun Shi and Peifeng Xiang

Smart spaces are open complex computing systems, consisting of a large variety of cooperative smart things. Central to building smart spaces is the support for sophisticated…

147

Abstract

Purpose

Smart spaces are open complex computing systems, consisting of a large variety of cooperative smart things. Central to building smart spaces is the support for sophisticated coordination among diverse smart things collaborating to accomplish specified tasks. Multi‐agent systems are often used as the software infrastructures to address the coordination issue in smart spaces. However, since agents in smart spaces are dynamic, resource‐bounded and have complicated service dependencies, current approaches to coordination in multi‐agent systems encounter new challenges when applied in smart spaces. The purpose of this paper is to address these issues.

Design/methodology/approach

The paper presents Baton, a service management system to explicitly resolve the particular issues stemming from smart spaces when coordinating agents. Baton is designed as a complement to coordination approaches in multi‐agent systems with a focus on mechanisms for service discovery, composition, request arbitration and dependency maintenance. Baton is now deployed in our own smart spaces to achieve better agent coordination.

Findings

The effectiveness and efficiency of Baton is validated by its practical use in the designed scenario and some evaluation experiments.

Research limitations/implications

An attempt at performing dynamic service composition in Baton is made by using semantic information in future work.

Originality/value

Baton, a service management system to explicitly resolve the particular issues stemming from smart spaces when coordinating agents is presented.

Details

International Journal of Pervasive Computing and Communications, vol. 5 no. 2
Type: Research Article
ISSN: 1742-7371

Keywords

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Article
Publication date: 26 June 2009

Victor Zamudio and Victor Callaghan

This paper aims to address a fundamental problem related to the interaction of rule‐based autonomous agents in pervasive and intelligent environments. Some rules of behaviour can…

168

Abstract

Purpose

This paper aims to address a fundamental problem related to the interaction of rule‐based autonomous agents in pervasive and intelligent environments. Some rules of behaviour can lead a multi‐agent system to display unwanted periodic behaviour, such as networked appliances cycling on and off.

Design/methodology/approach

The paper presents a framework called interaction networks (INs) as a tool to describe and analyse this phenomena. In support of this, and as an aid to the visualisation and understanding of the temporal evolution of agent states, a graphical multi‐dimensional model (MDM) is offered. An instability prevention system (INPRES) based in identifying and locking network nodes is described.

Findings

Both IN, MDM and INPRES enable system designers to identify and prevent cyclic instability. The effectiveness of the approach is evaluated using both simulated and physical implementations.

Research limitations/implications

The problem of cyclic instability is strongly related to the number of cycles in the IN associated. It is postulated that high coupling and high number of cycles contributes to the system to self‐lock; however, more research is needed in this direction.

Practical implications

The MDM, interaction benchmark, IN theory, INPRES and intelligent locking offer a practical solution to the problem of cyclic behaviour.

Originality/value

Before this work there was no framework for analysing and eliminating the problem of cyclic instability in rule‐based multi‐agent systems.

Details

International Journal of Pervasive Computing and Communications, vol. 5 no. 2
Type: Research Article
ISSN: 1742-7371

Keywords

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Article
Publication date: 26 June 2009

Ryohei Sagara, Yasue Kishino, Tsutomu Terada and Shojiro Nishio

In ubiquitous computing environments, not only programmers but also general users come to develop/customize applications. Therefore, the purpose of this paper is to propose a new…

252

Abstract

Purpose

In ubiquitous computing environments, not only programmers but also general users come to develop/customize applications. Therefore, the purpose of this paper is to propose a new application development environment for ubiquitous computing environments.

Design/methodology/approach

The paper clarifies the requirements for application development environments of ubiquitous computing environments. It then designs and implements a prototype of a development environment that fulfills these requirements.

Findings

It is found that the requirements for application development in ubiquitous computing environments are: easy programming, detection of current status, programming awareness of network connections between multiple ubiquitous devices, and debugging with cooperation among real/virtual environments.

Research limitations/implications

This prototype of application development environment is designed for event‐driven ubiquitous devices.

Practical implications

A prototype development environment has been implemented to show the effectiveness of this approach, and is presented an example of an application development to show the effectiveness of the approach.

Originality/value

This paper proposes a new style of application development for ubiquitous computing environments

Details

International Journal of Pervasive Computing and Communications, vol. 5 no. 2
Type: Research Article
ISSN: 1742-7371

Keywords

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Article
Publication date: 26 June 2009

Egil C. Østhus, Per‐Oddvar Osland and Lill Kristiansen

In many settings, the users are mobile (e.g. away from their desks) while high quality multimedia telephony equipment has fixed locations. This may result in unsuccessful…

199

Abstract

Purpose

In many settings, the users are mobile (e.g. away from their desks) while high quality multimedia telephony equipment has fixed locations. This may result in unsuccessful multimedia calls and motivates a context aware system which supports session mobility. This paper aims to address these issues.

Design/methodology/approach

The approach is to utilize state‐of‐the‐art in‐context awareness and integrate this into a real time telecom system based on SIP. System requirements are formulated and the system is designed, implemented and (technically) tested.

Findings

The paper contains a thorough analysis of why baseline SIP and SIP REFER alone cannot solve our case and why a new SIP extension is introduced. The solution is evaluated and compared to solutions such as “virtual terminals”.

Research limitations/implications

It is pointed out that the context model does not directly support roaming between two different business domains. This issue is however of limited impact in an enterprise setting. The current prototype is thoroughly tested from a technical viewpoint, but user studies in real organizations are recommended as further work.

Practical implications

The paper shows that human issues and issues relating to computer mediated communication (CMC) are strongly linked to technical details in SIP. In practice this means that researchers in CMC and CSCW should look more into building prototypes where real time conversational features are supported together with dynamic change of media types.

Originality/value

The main value of the paper is a thorough described technical realization of the context aware multimedia application ENriched MEdia (ENME). The background material and the appendix should be of value to anyone interested in convergence between computing and communication.

Details

International Journal of Pervasive Computing and Communications, vol. 5 no. 2
Type: Research Article
ISSN: 1742-7371

Keywords

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Article
Publication date: 26 June 2009

Abraham George, Anup Kumar and S. Srinivasan

Mobility management for single‐hop cellular networks has received much research attention in the last few years. One of the research challenges for 4G wireless systems is the…

343

Abstract

Purpose

Mobility management for single‐hop cellular networks has received much research attention in the last few years. One of the research challenges for 4G wireless systems is the design of mobility management techniques that integrate cellular and ad‐hoc networks. Currently, there are no structured mobility management schemes for these heterogeneous multi‐hop networks. This paper aims to address these issues.

Design/methodology/approach

This paper describes techniques for tracking a mobile node (MN) in an integrated architecture with minimum overhead. This paper proposes group rerouting concept.

Findings

The paper implements and evaluates the proposed protocol by using the network simulator (NS‐2). The proposed protocol increases performance compared to broadcasting schemes.

Research limitations/implications

This scheme considers devices with two interfaces only.

Practical implications

The paper proposes a scheme to extend the coverage of cellular base stations by using ad‐hoc devices.

Originality/value

This paper describes techniques for tracking an MN in an integrated architecture with minimum overhead. This scheme is independent of the routing protocol used in a multi‐hop network.

Details

International Journal of Pervasive Computing and Communications, vol. 5 no. 2
Type: Research Article
ISSN: 1742-7371

Keywords

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