Opportunistic spectrum access policy based on channel quality information

Opportunistic spectrum access is a promising approach to realize spectrum sharing between heterogeneous wireless networks. Previous research has not thoroughly considered the effect of the channel quality information on the opportunistic spectrum access. This study considers both the channel occupation information of the primary user and the channel quality information of the secondary user to design an opportunistic spectrum access policy with a channel quality threshold based policy by solving a convex optimization problem. This policy maximizes the effective throughput of the secondary user, while meeting the transmission quality requirement of the primary user, and is proved to be optimal in single channel scenarios. Numerical results show that this opportunistic spectrum access policy significantly improves the effective throughput of the secondary user.