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Random walk is one of the widely used techniques for information discovery in unstructured networks like ad hoc wireless networks (AWNs) and wireless sensor networks (WSNs). In a random walk, instead of taking all steps uniform randomly, our idea is to modify random walk to take some level biased steps to improve its energy efficiency and latency which are important design parameters in WSNs. The...
In this paper, an energy efficient adaptive modulation scheme is proposed for a wireless cognitive radio ad hoc network, where each node is equipped with cognitive radio and the network is an OFDMA system operating on time slots. In each slot, the users with new traffic demand will sense the spectrum and locate the available subcarrier set. Then they choose subcarriers with favorable channel condition...
Data aggregation is an essential paradigm for energy efficient routing in energy constraint wireless sensor networks (WSN). Data aggregation in WSN can be treated as searching for the Minimum Steiner Tree (MST) including source nodes and sink node. In this paper, we propose a Data-aggregation Algorithm based on Adaptive Ant Colony System (AACS) algorithm. In this algorithm, Directed Diffusion (DD)...
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