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Balanced aggregation trees for routing correlated data in wireless sensor networks

Huiyu Luo, G. Pottie
2005 Proceedings. International Symposium on Information Theory, 2005. ISIT 2005.  
In a sensor network, the data collected by different sensors are often correlated because they are observations of related phenomena. This property has prompted many researchers to propose data centric routing [2]-[4] to reduce the communication cost [1]. In this paper, we design heuristic algorithms for combined routing and source coding with explicit side information. We build a data rate model upon the observation that in many physical situations the side information that provides the most
more » ... provides the most coding gain comes from a small number of nearby sensors. Based on this model, we formulate a problem to determine the optimal routes for transmitting data to the fusion center. The overall optimization is NP hard because it has minimum Steiner tree as a sub-problem. We then propose a heuristic algorithm that is inspired by balanced trees that have small total weights and reasonable distance from each sensor to the fusion center [5]. The average performance of the algorithm is analyzed and compared to other routing methods through simulations.
doi:10.1109/isit.2005.1523283 dblp:conf/isit/LuoP05 fatcat:2u6n4al6o5hpfbbryyq47hyazu