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首页> 外文期刊>Journal of ambient intelligence and humanized computing >Cluster-based scheduling for cognitive radio sensor networks
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Cluster-based scheduling for cognitive radio sensor networks

机译：基于集群的认知无线电传感器网络调度

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摘要

In this paper, we define a cluster based scheduling algorithm for Cognitive Radio Sensor Networks. To avoid inter-clusters collision, we assign fixed channels only to nodes having one-hop neighbors out of their clusters. We denote these nodes as specific nodes. Previous studies assign distinct channels to whole neighbor clusters to avoid inter-clusters collision. Our objective is to optimize the spatial reuse and to increase the network throughput while saving sensors energy. We start by assigning channels only to the specific nodes. Once the problem of inter-clusters collision is solved, each cluster head (CH) schedules the transmissions in its cluster independently. For the cluster members that are specific nodes, the CH assigns only time slots because the channel assignment is already done. For other cluster members (CMs) (not specific nodes), the CH assigns the pair (channel, slot). Two solutions are proposed in this paper to schedule the CMs: the Frame Intra Cluster Multichannel Scheduling algorithm denoted Frame-ICMS and the Slot Intra Cluster Multichannel Scheduling algorithm denoted Slot-ICMS. We evaluate the performance of these algorithms in case of accurate PUs activity detection and in case of bad PUs activity estimation. We prove that our proposals outperform an existing one especially in terms of energy saving.
机译：在本文中，我们为认知无线电传感器网络定义了一种基于群集的调度算法。为了避免集群之间的冲突，我们仅将固定信道分配给集群中具有一跳邻居的节点。我们将这些节点表示为特定节点。先前的研究为整个邻居集群分配了不同的渠道，以避免集群之间的冲突。我们的目标是优化空间重用并增加网络吞吐量，同时节省传感器能量。我们从仅将通道分配给特定节点开始。解决了群集间冲突的问题后，每个群集头（CH）都会独立调度其群集中的传输。对于特定节点的群集成员，由于通道分配已完成，因此CH仅分配时隙。对于其他群集成员（CM）（非特定节点），CH分配对（通道，插槽）。本文提出了两种解决方案来调度CM：帧内集群多通道调度算法，称为Frame-ICMS；插槽内集群多通道调度算法，称为Slot-ICMS。我们在准确检测PU活动和不良PU活动估计的情况下评估这些算法的性能。我们证明，我们的建议尤其是在节能方面优于现有建议。

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