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PROJECT TITLE :

Dynamic spectrum access for energy-constrained CR: single channel versus switched multichannel

ABSTRACT:

In energy-constrained cognitive radio networks (CRNs), the selection on single channel access versus switched multichannel access is vital for energy saving and sustainable network operation. During this study, the authors study and compare the energy potency of switched (probabilistic) multichannel access (pMCA) and fixed single-channel access (SCA) in CRNs. In pMCA, a secondary user (SU) switches channel with bound chance whenever it encounters a busy channel. In SCA on the other hand, the SU stays on the identical channel for its usage and waits for its availability. Via an analytical framework the authors derive the channel utilisation and energy efficiency of the two schemes. From the results the authors examine the primary user (PU) traffic dependent optimum switching probability in pMCA and therefore the regime of PU activity dynamics where SCA outperforms pMCA.


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