Utility-based downlink power allocation in multicell wireless packet networks
Computer Communications
Performance analysis of scheduling and interference coordination policies for OFDMA networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
IEEE Transactions on Wireless Communications
Competition of wireless providers for atomic users: equilibrium and social optimality
Allerton'09 Proceedings of the 47th annual Allerton conference on Communication, control, and computing
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Power allocation across users in two adjacent cells is studied for a code-division multiple access (CDMA) data service. The forward link is considered and cells are modeled as one-dimensional with uniformly distributed users and orthogonal signatures within each cell. Each user is assumed to have a utility function that describes the user's received utility, or willingness to pay, for a received signal-to-interference-plus-noise ratio (SINR). The objective is to allocate the transmitted power to maximize the total utility summed over all users subject to power constraints in each cell. It is first shown that this optimization can be achieved by a pricing scheme in which each base station announces a price per unit transmitted power to the users, and each user requests power to maximize individual surplus (utility minus cost). Setting prices to maximize total revenue over both cells is also considered, and it is shown that, in general, the solution is different from the one obtained by maximizing total utility. Conditions are given for which independent optimization in each cell, which leads to a Nash equilibrium (NE), is globally optimal. It is shown that, in general, coordination between the two cells is needed to achieve the maximum utility or revenue.