Using DHCP with computers that move0
Wireless Networks
Challenges: an application model for pervasive computing
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Communications of the ACM
System Software for Ubiquitous Computing
IEEE Pervasive Computing
Project Aura: Toward Distraction-Free Pervasive Computing
IEEE Pervasive Computing
Location-Detection Strategies in Pervasive Computing Environments
PERCOM '03 Proceedings of the First IEEE International Conference on Pervasive Computing and Communications
The computer for the 21st Century
IEEE Pervasive Computing
Autonomic Pervasive Grids: A Session Manager Service for Handling Mobile Users
Proceedings of the 2005 conference on Self-Organization and Autonomic Informatics (I)
Middleware services for federating UbiComp environments
ICCOMP'06 Proceedings of the 10th WSEAS international conference on Computers
A web services based architecture for supporting mobile users in large enterprises
Journal of Web Engineering
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Current prototypes of UbiComp environments are bounded to a physical site equipped with a WLAN. However, next generation of UbiComp environments will have to aggregate different physical sites, spread over a wide geographic area, each one equipped with an own WLAN, and interconnected by the internet. The emerging model is a meta-environment that integrates different physical environments. It must provide users with a uniform interaction model independently from the physical site they are in. Clients, active in a site, have to get access only to services available in that site. Moreover, users, who move from one site to another one, must have the possibility of suspending their computations before leaving the site and of resuming them once in the new site. These needs call for advanced location and tracking services. This paper presents a location and tracking service for meta-UbiComp environments. The location function is in charge of determining mobile clients active inside the meta-environment, at every time, in every physical site. Mobile users get access only to services available in the physical site they are in. In addition, users are tracked, and the environment automatically reconfigures itself when they move from one location to another one, or when they definitively leave the environment. This makes the environment able to reliably handle resources and services.