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Uplink resource allocation in OFDMA cellular networks enhanced with two-hop fixed relays is studied in this paper. A resource optimization problem that maximizes sum uplink throughput of all users is formulated under path selection and PHY/MAC constraints. The dual decomposition method is adopted to solve the problem efficiently and optimally. Dual problem of the primal problem is decoupled into N...
Wireless mesh networks (WMNs) have emerged as a key technology for the next-generation wireless networking. Due to infrequent topology change and unreliable wireless links, a fundamental problem arisen is how to form an optimal topology to meet the traffic requirement. In this paper, we propose a joint optimization design on topology formation and traffic routing, which is formulated as a linear binary...
An alternative decomposition method for sum-utility maximization in the multi-user downlink is proposed. The proposed method is based on repeated local approximations of the Pareto efficient boundary of the rate region. Similar to known "layering as optimization" approaches, the utility maximization problem is vertically decomposed into a set of coupled sub-problems. Mathematically, however,...
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