Intra-Cluster Multichannel Scheduling Algorithm for Cognitive Radio Sensor Networks

International audienceIn this paper we propose a cluster-based multichannelscheduling algorithm for intra-cluster communicationsin Cognitive Radio Sensor Networks (CRSNs) to avoid collisionsbetween neighbor clusters. Since nodes having neighbor nodesout of their clusters may cause collisions between neighborclusters, when transmitting in the same time slot on the samechannel, the scheduling of each cluster cannot be establishedindependently. We propose to fix in each cluster the channelsused by nodes having conflicting nodes out of their clusters.This channel assignment is done by the cluster heads in adistributed way but according to the decreasing priority orderof the clusters. Then, each cluster head executes the schedulingalgorithm independently. We evaluate the performance of thisalgorithm in terms of total number of time slots needed byall the nodes to transmit all their packets to the sink, energyconsumption and transmission time interval