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Recent research activities on cognitive radio (CR) have mainly focussed on opportunistic spectrum access and spectrum utilization. However, CR technology will have a significant impact on upper layer performance in wireless networks, particularly in mobile ad hoc networks (MANETs). In this paper, we study topology control and routing issues in CR-MANETs and propose a distributed prediction-based cognitive...
Many existing routing protocols for wireless mesh networks (WMNs) are based on minimal hop counts and cannot fit WMNs because they did not take into account congestions in networks. Although other multipath routing protocols use node- or link-disjoint routes, they are still based on minimal hop counts and may even cause extra congestion into networks. This is because a node-disjoint path may contain...
In this paper, an energy-efficient multiple paths routing algorithm for wireless sensor network (WSN) is proposed. It consists of three elements: (i) gradients to disseminate data over multiple paths from a source to a sink, (ii) rules to set up disjoint multiple paths, and (iii) policies to select the working path. By limiting the maximum number of the gradients, the exploratory data messages forwarded...
In this paper, we propose a novel energy aware routing algorithm for target region monitoring in wireless sensor network. In our algorithm, a gathering node is chosen within target region based on energy metric and hops to sink to gather and aggregate data. Multiple paths are found between gathering node and sink, and each path is assigned a probability of being chosen, depending on the energy metric...
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