Efficient Computation Of Range Aggregates Against Uncertain Location Based Queries - 2011

ABSTRACT:

In several applications, together with location based services, queries don't seem to be precise. In this paper, we have a tendency to study the problem of efficiently computing vary aggregates during a multi-dimensional space when the question location is uncertain. That is, for a collection of knowledge points P, an uncertain location primarily based query Q with location described by a probabilistic density operate, we tend to wish to calculate the mixture information (e.g., count, average and total) of the info points within distance gamma to Q with likelihood a minimum of theta. We propose novel, economical techniques to unravel the problem based mostly on a filtering-and-verification framework. In particular, 2 novel filtering techniques are proposed to effectively and efficiently take away data points from verification. Finally, we tend to show that our techniques will be immediately extended to solve the vary question problem. Comprehensive experiments conducted on both real and artificial knowledge demonstrate the efficiency and scalability of our techniques.

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