@inproceedings{li:wwasn07, author = {Ming Li and David Kotz}, title = {Group-aware Stream Filtering}, booktitle = {Proceedings of the Fourth Workshop on Wireless Ad hoc and Sensor Networks (WWASN)}, year = {2007}, month = {June}, publisher = {IEEE Computer Society Press}, copyright = {IEEE}, address = {Toronto}, doi = {10.1109/ICDCSW.2007.38}, url = {http://www.cs.dartmouth.edu/~dfk/papers/li-wwasn07.pdf}, keyword = {wireless network, mobile computing, streaming data, sensor network}, abstract = {In this paper we are concerned with disseminating high-volume data streams to many simultaneous context-aware applications over a low-bandwidth wireless mesh network. For bandwidth efficiency, we propose a {\em group-aware stream filtering}\/ approach, used in conjunction with multicasting, that exploits two overlooked, yet important, properties of these applications: 1)~many applications can tolerate some degree of ``slack'' in their data quality requirements, and 2)~there may exist multiple subsets of the source data satisfying the quality needs of an application. We can thus choose the ``best alternative'' subset for each application to maximize the data overlap within the group to best benefit from multicasting. An evaluation of our prototype implementation shows that group-aware data filtering can save bandwidth with low CPU overhead.}, }