A review of Ad Hoc Cognitive Radio Network: an Energy-Efficient Infrastructure Sensor Network
Spectrum sensing, sensor network-based spectrum sensing, ad hoc cognitive radio network, clusters and subsets, infrastructure sensor network, subset scheduling, spectrum sensing.
We propose an energy-efficient network architecture that consists of ad hoc (mobile) cognitive radios (CRs) and infrastructure wireless sensor nodes. The sensor nodes within communications range of each CR are grouped into a cluster, and the clusters of CRs are regularly updated according to the random mobility of the CRs. We reduce the energy consumption and the end-to-end delay of the sensor network by dividing each cluster into disjoint subsets with overlapped sensing coverage of primary user (PU) activity. Respective subset of a CR provides target detection and false alarm probabilities. Substantial energy efficiency is achieved by activating only one subset of the cluster, while putting the rest of the subsets in the cluster into sleep mode. Additional gain in energy efficiency is obtained by these promising propositions: first selecting nodes from the active subset for actual sensing and switching the active subset to sleep mode by scheduling. The sensor nodes for actual spectrum sensing are chosen considering their respective time durations for sensing. To illustrate network performance in terms of energy usage and end-to-end delay, we compare the proposed CR network to existing techniques.
Article Details
Unique Paper ID: 152505

Publication Volume & Issue: Volume 8, Issue 3

Page(s): 669 - 675
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