Investigation on dynamic point selection scheme based on proportional fair criteria

The coordinated multipoint (CoMP) transmission is one of the promising techniques to increase the throughput of users located at the cell-edge. Among the CoMP transmission schemes, the dynamic point selection (DPS) combined with the dynamic point blanking (DPB) is investigated, since it can achieve superior performance with relatively small overhead. This paper proposes the DPS/DPB scheme based on the proportional fair (PF) criteria, which is effective to exploit the tradeoff between fairness and network performance. We derive the optimum DPS/DPB allocation scheme by solving the convex optimization problem based on the achievable average data rate of each user. The paper evaluates the performance of the proposed scheme in the simple environment using the one-dimensional model with two BSs (M = 2), and shows that the proposed scheme works well. Furthermore, the extension of the proposed scheme to select the DPS/DPB user candidates, and to the inter-cell interference coordination is presented.