Distributed Linear Precoder Optimization and Base Station Selection for an Uplink Heterogeneous Network

摘要: In a heterogeneous wireless cellular network, each user may be covered by multiple access points such as macro/pico/relay/femto base stations (BS). An effective approach to maximize the sum utility (e.g., system throughput) in network is jointly optimize users' linear procoders well their BS associations. this paper, we first show that joint optimization problem NP-hard and thus difficult solve global optimality. To find locally optimal solution, formulate noncooperative game which users BSs both act players. We introduce set of new functions for players every Nash equilibrium (NE) resulting stationary solution original maximization problem. Moreover, develop best-response type algorithm allows distributedly reach NE game. Simulation results proposed distributed can effectively relieve local congestion simultaneously achieve high throughput load balancing network.