The continuous development of wireless networks and mobile devices has motivated an intense research in mobile data services. Some of these services provide the user with context-aware information. Specifically, location-based services and location-dependent queries have attracted a lot of interest.In this article, the existing literature in the field of location-dependent query processing is reviewed. The technological context (mobile computing) and support middleware (such as moving object databases and data stream technology) are described, location-based services and location-dependent queries are defined and classified, and different query processing approaches are reviewed and compared.

https://webdiis.unizar.es/~silarri/PUBLICATIONS/acmSurvLDQP09.pdf

Location-dependent query processing: Where we are and where we are heading

https://www.cs.helsinki.fi/u/jakangas/Papers/aitenbichler07pmc.pdf

MundoCore: A light-weight infrastructure for pervasive computing

The extensive use of local networks is beginning to drive requirements for internetwork facilities that connect these local networks. In particular, the availability of multicast addressing in many local networks and its use by sophisticated distributed applications motivates providing multicast across internetworks.In this paper, we propose a model of service for multicast in an internetwork, describe how this service can be used, and describe aspects of its implementation, including how it would fit into one existing internetwork architecture, namely the US DoD Internet Architecture.1 2

Host groups: A multicast extension for datagram internetworks

Computer culture: The scientific, intellectual, and social impact of the computer, annals of the New York Academy of Sciences : Heinz R. Pagels (Ed.), vol. 426 (New York Academy of Sciences, New York, 1984); 275 pages, $66.00

Methods for publish/subscribe applications over P2P networks have been a research issue for a long time. Many approaches have been developed and evaluated, but typically each based on different assumptions, which makes their mutual comparison very difficult if not impossible. We identify two design patterns that can be used to implement publish/subscribe applications over structured P2P networks and provide an analytical analysis of their complexity. Based on a characterization of different real-world usage scenarios we present evidence as to which approach is preferable for certain application classes. Finally, we present simulation results that support our analysis.

/pdf/a-comparative-study-of-pub-sub-methods-in-structured-p2p-3vgq32ffey.pdf

A comparative study of pub/sub methods in structured P2P networks

This thesis provides solutions to the question, how the successfully deployed publish/ subscribe paradigm can be extended to serve as a middleware platform for the use in conjunction with pervasive computing systems. It does so by proposing concrete architectures, algorithms, and frameworks.

Andreas Zeidler

Papers

A Distributed Publish/Subscribe Notification Service for Pervasive Environments