Joint Control of Autonomous Cell Association and Power Control for Heterogeneous Networks with Inter-Cell Interference Coordination

Investigation on Power Control Algorithm in Joint Control Method of Autonomous Cell Association and Power Control for Heterogeneous Networks

“…In [17], we used a two-step algorithm to find the solution for (P2), whose calculation complexity is relatively low. However, the two-step algorithm does not necessarily find the optimal solution to the given problem.Therefore, we describe a new algorithm that can always find the optimal solution to (P2).…”

“…Parameters δ 1 , δ 2 , and P are set to 0.001, 0.04 and 0.1, respectively. For comparison, the performance level when we apply our previously reported two-step algorithm [17] to transmission power control is also presented. As the number of iterations increases, the geometric mean user throughput of the proposed method is increased.…”

“…To address these problems, we recently proposed a joint control method for cell association and transmission power control of the pico-BSs in downlink HetNets with ICIC [17]. The previously proposed method employs an iterative algorithm, in which the cell association for a given transmission power of all BSs and transmission power control of respective BSs for a given cell association are alternately repeated for convergence.…”

“…The optimization criterion is proportional fairness [9]. In our previous report [17], we proposed a two-step power control algorithm whose calculation complexity is relatively low. However, the algorithm does not necessarily find the optimal solution to the given problem.…”

“…Then, Section 3 describes the proposed method. Section 4 presents numerical results based on computer simulation to show the proposed method compared to the previously proposed method [17]. Section 5 concludes the paper.…”