Joint resource allocation with energy harvesting base stations in two adjacent cells

Optimal energy and spectrum cooperative allocation is investigated for the downlink of two energy harvesting base stations in this paper. In particular, the joint maximization of the users' utilities and the base stations' revenues in two adjacent cells is considered. Each user can join either cell 1 or cell 2. When the users' choices on which cell to join are fixed, the energy and spectrum allocation problems can be matched to the framework of a generalized Stackelberg game, and can be solved optimally. The users' choices on which cell is a key step in the resource allocation process. Since each user has two options to join cell1 or cell2, the optimal method of solving the sum-utility maximizing energy and spectrum allocation problem is the exhaustive search, which finds the best solution among all possible sets of user choices and has high complexity. A computation-efficient method which user can choose appropriate cell to join is proposed based on the channel gain weight. Simulation results have shown that the proposed method has close utility and revenue performances with the optimal exhaustive search method.1