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Current Wireless Sensor Networks (WSNs) are deployed over unlicensed frequency bands that face an increased level of interference from various wireless systems. Cognitive Radio Sensor Networks (CRSNs) overcome this problem by allowing sensor nodes to access new spectrum bands to minimize interferences. In this paper, we focus on the MultiChannel Time Slot(More)
Distributed space time coding (DSTC) is an efficient way to exploit spatial diversity for cooperative system. In regular cooperative diversity networks, relays forward the source signal to the destination every time regardless of the channel conditions which limits the system throughput. In this paper, we propose an incremental relaying protocol based on(More)
In this paper we propose a cluster-based multichannel scheduling algorithm for intra-cluster communications in Cognitive Radio Sensor Networks (CRSNs) to avoid collisions between neighbor clusters. Since nodes having neighbor nodes out of their clusters may cause collisions between neighbor clusters, when transmitting in the same time slot on the same(More)
The unlicensed spectrum bands become overcrowded causing an increased level of interference for current wireless sensor nodes. Cognitive Radio Sensor Networks (CRSNs) overcome this problem by allowing sensor nodes to access opportunistically the underutilized licensed spectrum bands. The sink assigns the spectrum holes to the secondary users (SUs).(More)
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