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Performance analysis of transmission scheduling in cognitive wireless sensor networks

Cognitive wireless sensor networks exploit the spectrum heterogeneity to access the different spectrum bands for data transmission. The various spectrum access schemes proposed in the previous work assume that each node can access and transmit their data using a single spectrum band at any given time, with the access to the different spectrum bands being dynamic and relative to the wireless medium conditions. However, this approach may not be enough to address the networks with a large number of nodes that are exchanging high volumes of data. In this paper, we propose a transmission scheduling policy for allowing the sensor nodes to transmit its data across a multiple number of spectrum bands, and simultaneously. We also present a mathematical model to analyze the performance of the sensor nodes that employ our proposed scheduling policy. The results of the analysis can further be used to determine the optimal policy parameters.