Spectrum decision based on Up-Time Radio of spectrum

CR technology enables CR users the capability to share the wireless channel with licensed users in an opportunistic manner. In cognitive network, once the primary user appears on the spectrum during the entire communication of the CR user, the CR user has to vacate the channel and switch to another one. In this paper, a Spectrum Decision based on Up-Time Ratio of spectrum (SDUTR) is presented, which puts key focus on reducing collision on the licensed spectrum between the primary user and the secondary one. Moreover, the SDUTR algorithm can be operated over heterogeneous spectrum bands. Simulations show that total broadcasting delay and information redundancy of the network are reduced as compared to selective broadcasting ^[7].