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To solve the multi-dimensional event based query in wireless sensor networks, this paper proposes four bloom filter based query processing algorithms UBP, BBP, SRBP and PBP. The four algorithms proposed can be classified into two classes: two bloom filter based precise algorithms, which are UBP and BBP, and two bloom filter based approximate algorithms, which are SRBP and PBP. By using the bloom filter...
Data centric storage is an effective algorithm to organize data in the sensor networks. Even though such kind of storage can save more energy than other algorithms, such as flooding based algorithm, it also wastes energy in some cases. For example, the event frequency is much more than the query frequency. To overcome this problem, we propose an index based query processing algorithm. We analyze the...
In this paper a novel energy efficient algorithm based on relevant node selection is proposed to deal with a new kind of approximate query, named node number constraint query, for wireless sensor networks. The query processing algorithm is composed of three parts: relevant node selection algorithm, energy efficient query dissemination and result collection algorithm. According to the user's precision...
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