Performance analysis of a relay-aided cognitive radio network with multiple secondary links

Stochastic geometry approach towards interference management and control in cognitive radio network: A survey

“…The expressions for the success probability in both primary and secondary networks can be obtained by following any of the methods discussed in Section 3. In order to obtain a more simplified analysis, a single PU and multiple SUs were considered in [133] where primary transmitter-receiver pairs communicate through a line-of-sight link, while transmissions between secondary transmitter-receiver pairs are achieved via selected relays as a result of the path loss and shadowing, which makes direct transmission through the line-of-sight links impossible in secondary networks. In such a network, relays are not used in the primary network.…”