System support for pervasive applications

Abstract

Pervasive computing provides an attractive vision for the future of computing. Computational power will be available everywhere. Mobile and stationary devices will dynamically connect and coordinate to seamlessly help people in accomplishing their tasks. For this vision to become a reality, developers must build applications that constantly adapt to a highly dynamic computing environment. To make the developers' task feasible, we present a system architecture for pervasive computing, called one.world. Our architecture provides an integrated and comprehensive framework for building pervasive applications. It includes services, such as discovery and migration, that help to build applications and directly simplify the task of coping with constant change. We describe our architecture and its programming model and reflect on our own and others' experiences with using it.

An Application Framework for a Situation-Aware System Support for Smart Spaces

“…There are a few ambitious middleware systems that were proposed as metaoperating systems capable of providing an integrated programming model for application developers [6,13,3,4,1]. Despite this considerable research effort, in recent years we have been witnessing a growing perception about a persistent gap between the promises of the area and its real achievements.…”

Handling Membership Dynamicity in Service Composition for Ubiquitous Computing

“…Service orientation alone will not solve the problem of creating services exploiting the particular device set a user has. If applications are implemented by developers using a service composition framework [3][4][5] it is hard for the user to control which services are used, how they are connected, and how they interact. Another option is to let the user try to specify the task he wants to solve in an abstract way and let the middleware determine how services should be composed [6][7][8].…”

Dynamic deployment of pervasive services

“…When an LIS detects a new tag in a cell, the LIS multicasts a query that contains the identity of the new tag and its own network address to all the component hosts in its current sub-network. 6 It then waits for reply messages from the component hosts. Here, there are two possible scenarios: it may be attached to a component host or the tag may be attached to a person, place, or thing other than a component host.…”

“…Here, we will 6 Note that the coverage area of an RFID reader is mostly contained within the reachable domain of multicasting communications. explain some programming interfaces, which characterize the framework.…”

“…Although Aura shares several common design goals with our framework, it focuses on providing contextual services to users rather than integrating multiple computers to support functions and performance unattainable through a single computer. One.world [6] by the University of Washington and our MobileSpaces [16] provided an infrastructure for pervasive computing environments and mobile containers. This was called an environment by one.world and a hierarchical mobile agent by MobileSpaces, where each container not only provided the structure and controls for computational services but also acted as a carrier for the other containers.…”