Article

Hybrid Spatial Query Processing between a Server and a Wireless Sensor Network.

IEICE Transactions 01/2010; 93-D:2306-2310. DOI: 10.1587/transinf.E93.D.2306
Source: DBLP

ABSTRACT There has been much interest in a spatial query which acquires sensor
readings from sensor nodes inside specified geographical area of
interests. A centralized approach performs the spatial query at a server
after acquiring all sensor readings. However, it incurs high wireless
transmission cost in accessing all sensor nodes. Therefore, various
in-network spatial search methods have been proposed, which focus on
reducing the wireless transmission cost. However, the in-network methods
sometimes incur unnecessary wireless transmissions because of dead
space, which is spatially indexed but does not contain real data. In
this paper, we propose a hybrid spatial query processing algorithm which
removes the unnecessary wireless transmissions. The main idea of the
hybrid algorithm is to find results of a spatial query at a server in
advance and use the results in removing the unnecessary wireless
transmissions at a sensor network. We compare the in-network method
through several experiments and clarify our algorithm's remarkable
features.

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