Abstract-Cognitive radio (CR) is proposed to use the spectrum opportunistically. Spectrum opportunity (SOP) can be defined as the possibility of a spectrum-aware communication between a CR transmitter and a CR receiver. Successful spectrum-aware communication between the communicating CRs, which is utilization of SOP (USOP), depends on the SOP detection and the correct transmission of a packet. Spectrum sensing performance, physical channel, and network parameters affect the probability of USOP. In this letter, we characterize the probability of the USOP under different network topologies. The network topology is due to the relation between transmission ranges of licensed users and CRs. We numerically study this probability for different network parameters and topologies. We find that the characteristics of USOP highly depend on the network topology, CR sensing performance and licensed users' activities. Index Terms-Cognitive radio, spectrum opportunity, network topology.
The probability of successful joint idle channel detection and packet transmission, which is defined as the utilization of SOP (USOP), is discussed in REF and determined the probability of USOP in a dynamic radio environment under imperfections in the channel sensing for different network topologies.
On the Utilization of Spectrum Opportunity in Cognitive Radio Networks
IEEE Communications Letters
IEEE Communications Letters
Computer Science