Abstract: Joint energy and spectrum cooperative allocation in the downlink is investigated for multiple adjacent cells equipped with energy harvesting base stations. In particular, the joint maximization of the users' utilities and the base stations' revenues in multiple adjacent cells is considered. The users' choice of cells is a key step in the resource allocation process. Since each user has multiple options to join adjacent cells, 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 suboptimal method of deciding which user can choose the appropriate cell to join is proposed based on the channel gain ratio selection. When the users' choices are fixed, the energy and spectrum allocation problems can be matched with the framework of a generalized Stackelberg game, and can be solved. At the same time, two kinds of reference methods, the maximum channel gain selection method and shortest distance selection method, are proposed based on the channel gain ratio selection. Simulation results have shown that the proposed method has better utility and revenue performances than maximum channel gain selection and shortest distance selection method.

Key words: energy harvesting, resource allocation, Stackelberg game, channel gain ratio