Joint price and power allocation under interference constraint for dynamic spectrum access networks

This paper presents a Stackelberg game based pricing strategy for secondary users (SUs) sharing spectrum with primary user (PU). In the proposed model, PU imposes interference price on SUs to earn revenue and maintain its minimum data rate while SUs jointly adjust their power to maximize their utility functions. Since the interference from SUs to PU is kept under the interference constraint and SUs compete against each other for power allocation, there is the need to determine a power allocation strategy which converges to the Stackelberg equilibrium (SE). Closed form expressions of price and power allocation which satisfy both type of users in the network are derived and verified with simulation.