CoMP in heterogeneous networks: A joint cooperative resource allocation approach

Coordinated multipoint transmission (CoMP) is considered for a heterogeneous network where different kinds of base stations (BS) are located. We focus on linear transceiver design including user scheduling with the goal of maximizing the weighted sum rate in the downlink of a multiple-input multiple-output orthogonal frequency division multiple access (MIMO-OFDMA) system, where each subchannel is allocated to a single user. Since the optimal solutions are extremely computationally complex to obtain, we propose a suboptimal joint resource allocation algorithm with a lower overall complexity. The proposed algorithm is able to take various linear power constraints into account, and simulation results indicate that using the proposed method achieves near-optimal solutions.