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Distributed resource optimization in multicell OFDMA networks

Mohammad Fathi, Eleftherios Karipidis
2012 2012 IEEE Wireless Communications and Networking Conference (WCNC)  
We consider the joint allocation of receiver, bit, and power to subcarriers in the downlink of multicell orthogonal frequency-division multiple-access (OFDMA) networks. Assuming that the cells share the entire bandwidth and that the rates are discrete, we formulate the joint allocation problem as a nonlinear mixed integer program (MIP), which however has exponential worst-case complexity. We capitalize on the capability of the receivers to measure the interference-plus-noise on every subcarrier
more » ... on every subcarrier and decompose the joint problem into a set of smaller-scale linear MIPs solved by individual base stations. Accordingly, we propose a distributed algorithm with linear complexity, in which the base stations participate in the problem solution in a round-robin manner. Simulation results demonstrate the effectiveness of the proposed algorithm in comparison with the iterative waterfilling algorithm and the successive optimal solution, by means of standard branch-and-cut solvers, of the individual MIPs.
doi:10.1109/wcnc.2012.6213982 dblp:conf/wcnc/FathiK12 fatcat:yg7tdg7c7zbb7n66tre6e7wz7y