Research Article
Distributed Context Support for Ubiquitous Mobile Awareness Services
@INPROCEEDINGS{10.1109/CHINACOM.2009.5339728, author={Theo Kanter and Stefan Pettersson and Stefan Forsstr\o{}m and Victor Kardeby and Roge Norling and Jamie Walters and Patrik \O{}sterberg}, title={Distributed Context Support for Ubiquitous Mobile Awareness Services}, proceedings={ChinaCom2009-Advances in Internet Symposium}, publisher={IEEE}, proceedings_a={CHINACOM2009-AIS}, year={2009}, month={11}, keywords={}, doi={10.1109/CHINACOM.2009.5339728} }- Theo Kanter
Stefan Pettersson
Stefan Forsström
Victor Kardeby
Roge Norling
Jamie Walters
Patrik Österberg
Year: 2009
Distributed Context Support for Ubiquitous Mobile Awareness Services
CHINACOM2009-AIS
IEEE
DOI: 10.1109/CHINACOM.2009.5339728
Abstract
Context-aware applications and services require ubiquitous access to context information about the users or sensors such as preferences, spatial & environmental data, available connectivity, and device capabilities. Systems for the brokering or the provisioning of context data via wireless networks do so with centralized servers or by employing protocols that do not scale well with real-time distribution capabilities. In other cases, such as the extending of presence systems, the data models are limited in expressive capabilities and consequently incur unnecessary signaling overhead. This paper presents a distributed protocol, the Distributed Context eXchange Protocol (DCXP), and an architecture for the real-time distribution of context information to ubiquitous mobile services: We present the architecture and its principle operation in a sample ubiquitous mobile awareness service. Preliminary results indicate that our approach scales well for the ubiquitous provision of context data in real-time to clients on the Internet via 3G wireless systems. Performed measurements show that DCXP can reduce the time to process context data with a factor of 20 compared to similar approaches.
