Abstract
With the proliferation of mobile devices such as PDAs and smart-phones, users get accustomed to using them in their daily life. This raises the expectations for user-customized and environment-aware services. However, mobile context-aware systems inherently feature characteristics of distribution and heterogeneity which pose great challenges to their developers. In this chapter, we focus on context distribution in mobile and ubiquitous computing environments. After describing the requirements in such environments, we propose a hybrid peer-to-peer based context distribution approach, which is built on top of the JXTA framework, a standard for peer-to-peer systems. We categorize context-aware system entities into three types of peers according to their device capabilities and their roles in context distribution. The peers are able to dynamically discover each other along with their offered services, form groups, and communicate with each other. The proposed approach is evaluated against the derived requirements and illustrated through a motivating scenario.
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Notes
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URBAM terminals are special Internet-connected devices which are made available in some RATP metro stations to offer information services to the passengers.
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Acknowledgements
This chapter was financially supported by the European Union (MUSIC-IST project, 6th Framework Programme, contract number 35166). The authors from the European Media Laboratory GmbH are supported by the Klaus Tschira Foundation.
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Hu, X. et al. (2009). A Hybrid Peer-to-Peer Solution for Context Distribution in Mobile and Ubiquitous Environments. In: Papadopoulos, G., Wojtkowski, W., Wojtkowski, G., Wrycza, S., Zupancic, J. (eds) Information Systems Development. Springer, Boston, MA. https://doi.org/10.1007/b137171_52
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