Distributed Resource Optimization in Multicell OFDMA Networks
2012 (English)In: Proceedings of the IEEE Wireless Communications and Networking Conference (WCNC), IEEE , 2012, 1316-1320 p.Conference paper (Refereed)
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 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.
Place, publisher, year, edition, pages
IEEE , 2012. 1316-1320 p.
, Wireless Communications and Networking Conference (WCNC), ISSN 1525-3511
IdentifiersURN: urn:nbn:se:liu:diva-72918DOI: 10.1109/WCNC.2012.6213982ISBN: 978-1-4673-0436-8OAI: oai:DiVA.org:liu-72918DiVA: diva2:463650
IEEE Wireless Communications and Networking Conference (WCNC)
FunderEU, FP7, Seventh Framework Programme, 248001