Price-based uplink resource allocation for hybrid-spectrum femtocell networks

Femtocell networks embedded in the macrocell greatly benefit capacity gain from high SINR and dedicated BS to home subscribers. However, the lack of schemes to effectively control the interference and fully utilize radio resources creates challenges to practically facilitate the additive unlicensed spectrum in femtocells. To tackle these challenges, this paper presents a solution to the interference management scheme and resource allocation strategy for a two-tier macrocell. We investigate the cross tier interference caused by the uplink transmission of femtocell users. By introducing the interference payoffs that specifies the revenue of the macrocell and the cost of the femtocell users, the optimum radio resource allocation scheme and interference price are proposed to enhance the radio resource utilization. Numerical results show the advantage of barrier method and good convergence property. Simulation results also demonstrate that our proposed resource allocation scheme supports the effectiveness on the interference management in terms of the utility maximization of macrocell and femtocell users.