Abstract
A New Protocol for Cooperative Spectrum Sharing in Mobile Cognitive Radio Networks
Highlights
IntroductionSpectrum allocation is conventionally performed by allocating a predefined portion of the spectrum to a primary ( referred to as licensed users) network for a long time and at a specific location [1]
In wireless networks, spectrum allocation is conventionally performed by allocating a predefined portion of the spectrum to a primary network for a long time and at a specific location [1]
We observe that the blocking rate of the proposed new frequency-range MAC protocol (NFRMAC) is up to 10% smaller than of the DDMAC and best multichannel method (BMC) when Ȝ = 4
Summary
Spectrum allocation is conventionally performed by allocating a predefined portion of the spectrum to a primary ( referred to as licensed users) network for a long time and at a specific location [1]. Opportunistic and dynamic utilization of the spectrum has been advocated as a solution to cope with rising demand in unlicensed wireless services. Cognitive radio (CR) has been widely studied as an approach for increasing spectrum efficiency by allowing dynamic spectrum access of unoccupied bands through spectrum sensing [2], [3]. In opportunistic CR ( referred to as interweave CR) [9], whenever a PU is absent in the radio environment, SUs are allowed to use the frequency band; so CR should perform spectrum sensing to sense and estimate the presence of the PU [3], [9]
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