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management strategies. As shown in [2], the information market model is a promising
approach. Nevertheless it is required to do a more detailed evaluation of the proposed
concepts.
In the future, several interesting aspects need to be evaluated. For instance, the man-
agement of information about marketplaces themselves needs to be tackled, like their
establishment and discovery. One possible solution here is to rely on general knowl-
edge which locations might be well-suited as e.g. train stations and shopping malls. A
different approach is to dynamically determine marketplaces by observing devices and
discovering common patterns. The management of data within information markets is
another area for future research, including for example to de-centralize the Information
Market Manager. It might also be interesting to evaluate if an exchange of information
across several information markets would improve the overall system effectiveness. Ad-
ditionally, we currently assume information to be stored atomically. In order to leverage
both fault tolerance and load balancing, it could be interesting to split one piece of in-
formation into multiple chunks obeying a certain level of redundancy, and to distribute
those on several devices. Finally, several application domains exist that obey different
interaction paradigms. Examples include cases where data becomes out-of-date rather
quickly, or applications that are comparatively tightly coupled. Hence, other concepts
respectively communication patterns aside from the information market model for shar-
ing and exchanging information need to be developed.
References
1. Hogie, L., Hutter, C.: Middleware Support for Ubiquitous Computing. ERCIM News No. 54,
July (2003)
2. Goergen, D., Frey, H., Lehnert, J.K., Sturm, P.: Marketplaces as Communication Patterns in
Mobile Ad-Hoc Networks. Proceedings of KiVS 2003, Kommunikation in Verteilten Syste-
men (2003)
3. Brust, M., Rothkugel, S.: Cooperative and Mobile Learning in Ad-Hoc Networks. Proceedings
of WCETE 2004, World Conference on Engineering and Technology Education, Brasil (2004)
4. Kulik, J., Rabiner, W.,Balakrishnan, H.: Adaptive Protocols for Information Dissemination in
Wireless Sensor Networks. Proceedings of the 5th ACM/IEEE Mobicom Conference, Seattle,
WA, August (1999)
5. Doval, D.,O’Mahony, D.: Nom: Resource Location and Discovery for Ad Hoc Mobile Net-
works. Proceedings of the 1st Annual Mediterranean Ad Hoc Networking Workshop, Med-
hoc-Net (2002)
6. Touzet, D., Menaud, J.-M., Weis, F., Couderc, P., Bantre, M.: SIDE Surfer: A Spontaneous
Information Discovery and Exchange System. Proceedings of the 2nd International Workshop
on Ubiquitous Computing and Communication, Barcelona, Spain (2001)
7. Mamei, M., Zambonelli, F., Leonardi, L.: Tuples on the Air: A Middleware for Context-Aware
Pervasive Computing. Technical Report No. DISMI-2002-23, University of Modena and Reg-
gio Emilia, Italy, August (2002)
8. Herrmann, K.: MESHMdl - A Middleware for Self-Organization in Ad hoc Networks. Pro-
ceedings of the 1st International Workshop on Mobile Distributed Computing (MDC’03),
Providence, Rhode Island, USA (2003)
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