Spectrum aware on-demand routing in cognitive radio networks
Keywords:
Cognitive Radio Networks, Spectrum aware on-demand routing, Cognitive radio network(CRN), spectrum allocation.Abstract
When a cognitive radio (CR) device changes its operation frequency, it experiences a hardware switching delay to tune to its new frequency before it can fully utilize it. This delay in general depends on the wideness between the two frequency bands. When the range of frequencies that the cognitive radio network (CRN) operates in is narrow, this delay difference might be negligible. But the CRNs of the future are envisioned to operate in a wide range of frequency bands. So the spectrum allocation and scheduling algorithms designed for CRNs have to take into account different delays that occur while switching to different frequency bands. The dependence of the switching delay on the wideness between the old and new central frequencies is unique to the dynamic spectrum access paradigm since other wireless technologies typically operate in a narrower bandwidth. In the proposed work a model is presented for spectrum aware on-demand routing in cognitive radio networks.
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