Developing Ambient Intelligence Systems: A Solution based on Web Services

Abstract

Enabling the ambient intelligence vision means that consumers will be provided with universal and immediate access to available content and services, together with ways of effectively exploiting them. Concentrating on the software system development aspect, this means that the actual implementation of any ambient intelligence application requested by a user can only be resolved at runtime according to the user's specific situation. This paper introduces a base declarative language and associated core middleware, which supports the abstract specification of Ambient Intelligence applications together with their dynamic composition according to the environment. The proposed solution builds on the Web services architecture, whose pervasiveness enables both services availability in most environments, and specification of applications supporting automated retrieval and composition. In addition, dynamic composition of applications is dealt in a way that enforces the quality of service of deployed applications in terms of security and performance.

ubiSOAP: A Service Oriented Middleware for Seamless Networking

“…However, enabling service-oriented computing in pervasive networking environments raises key challenges among which overcoming resource constraints and volatility of wireless, mobile devices. This has in particular led to introduce lightweight service-oriented middleware [10,2,1,16]. However, to the best of our knowledge, none of the existing solutions comprehensively integrate the full capacity of today's pervasive networking environments, which allow wireless devices to interact via multiple network paths.…”

“…Indeed, early solutions introduced towards nomadic computing targeted service hosts with which connectivity can eventually be restored, while this cannot be assumed in general when services are hosted by mobile devices that connect in an ad hoc way [24]. Overcoming resource constraints of wireless devices in the support of Web services has led to the introduction of custom SOAP engines, among which the open source iCSOAP engine from INRIA, which was developed as part of the WSAMI middleware 1 featuring Web services for ambient intelligence [10].…”

“…Moreover, these devices are usually interconnected through one or more heterogeneous wireless links, which compared to wired networks are characterized by lower bandwidths, higher error rates, and frequent disconnections. The former issue has led to the introduction of lightweight middleware enabling base WS-oriented communication patterns among wireless portable devices (i.e., SOAP-based messaging and dynamic service discovery) [10,1]. The latter issue has further led to examine alternative SOAP transports [5].…”

Enhanced Reputation Mechanism for Mobile Ad Hoc Networks

“…8 Normalization is necessary here because ri/bi does not fall into [−1, 1], one normalization way is to define a perfect value (i.e., 1), e.g., five times the requested value. All values higher than perfect is considered perfect.…”

“…Our work targets service provision among agents in MANET. The service notion here is general 1 , referring to not only services like Web services [8], packet forwarding services [6,5], but also activities like providing information (e.g., providing cuisine recipes) in online discussion forums.…”