Coordinated Scheduling and Power Allocation in Downlink Multicell OFDMA Networks

• Published in: IEEE transactions on vehicular technology Vol. 58; no. 6; pp. 2835 - 2848
• Main Authors: Venturino, L., Prasad, N., Xiaodong Wang
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Allocations; Applied sciences; Base station coordination; Base stations; Channels; Combinatorial analysis; Costs; Downlink; Equipments and installations; Exact sciences and technology; Femtocell networks; Information, signal and communications theory; Interchannel interference; Interference constraints; interference mitigation; Intersymbol interference; Job shop scheduling; Mobile radiocommunication systems; Multiplexing; Networks; nonconvex optimization; Organization and planning of networks (techniques and equipments); orthogonal frequency-division multiple access (OFDMA); Radiocommunications; Receiving antennas; Scheduling; Signal and communications theory; spectrum balancing; Stations; Strategy; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Wireless communication; Wireless networks; Performance evaluation; Non convex programming; Combinatorial problem; Noise reduction; Base station coordination; Cochannel interference; Base station; Wireless telecommunication; Frequency division multiple access; Feedback regulation; Downlink; Cell network; nonconvex optimization; Power allocation; interference mitigation; Mobile radiocommunication; Scheduling; Signalling; Frequency reuse; Interference suppression; orthogonal frequency-division multiple access (OFDMA); Algorithm performance; spectrum balancing; Quality control; Orthogonal frequency division multiplexing; Signal processing; Wireless network; System simulation; Planning
• ISSN: 0018-9545; 1939-9359
• DOI: 10.1109/TVT.2009.2013233

We consider a multicell orthogonal frequency-division multiple-access (OFDMA) wireless network with universal frequency reuse and treat the problem of cochannel interference mitigation via base station coordination in the downlink. Assuming that coordinated access points only share channel quality measurements but not user data symbols, we propose to select the set of cochannel users and the power allocation across tones to maximize the weighted system sum rate subject to per-base-station power constraints. Since this is a nonconvex combinatorial problem, efficient suboptimal algorithms are presented and discussed, each requiring a different level of coordination among base stations and a different feedback signaling overhead. Simulation results are provided to assess the performances of the proposed strategies.