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Energy efficiency is the main objective in the design of a wireless sensor network (WSN). In many applications, sensing data must be transmitted from sources to a sink in a timely manner. This paper describes an investigation of the trade-off between two objectives in WSN design: minimizing energy consumption and minimizing end-to-end delay. We first propose a new distributed clustering approach to...
This paper addresses the (r, 1 + e)-approximate near neighbor problem ( or (r, 1 + e)-NN) that is defined as follows: given a set of n points in a d-dimensional space, a query point q and parameter 0 < d < 1, build a data structure that reports a point within distance (1 + e)r from q with probability 1 -- d, if there is a point in the data set within distance r from q. We present an algorithm...
In recent years, wireless sensor network (WSN) achieved many accomplishments in theoretical studies and practical applications. However, WSNs are facing with many challenges, one of the biggest challenges that the energy source is limited and difficult to recharge. Clustering is the efficient technique used to extend the network lifetime through data aggregation. In this paper, we propose a new approach...
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