@ARTICLE{5424080,
author={Awad, M.K. and Mahinthan, V. and Mehrjoo, M. and Xuemin Shen and Mark, J.W.},
journal={Vehicular Technology, IEEE Transactions on}, title={A Dual-Decomposition-Based Resource Allocation for OFDMA Networks With Imperfect CSI},
year={2010},
month={jun.},
volume={59},
number={5},
pages={2394 -2403},
abstract={This paper presents a novel scheme for the allocation of subcarriers, rates, and power in orthogonal frequency-division multiple-access (OFDMA) networks. The scheme addresses practical implementation issues of resource allocation in OFDMA networks: the inaccuracy of channel-state information (CSI) available to the resource allocation unit (RAU) and the diversity of subscribers' quality-of-service (QoS) requirements. In addition to embedding the effect of CSI imperfection in the evaluation of the subscribers' expected rate, the resource-allocation problem is posed as a network utility maximization (NUM) one that is solved via decomposing it into a hierarchy of subproblems. These subproblems coordinate their allocations to achieve a final allocation that satisfies aggregate rate constraints imposed by the call-admission control (CAC) unit and OFDMA-related constraints. A complexity analysis shows that the proposed scheme is computationally efficient. In addition, performance evaluation findings support our theoretical claims: A substantial data rate gain can be achieved by considering the CSI imperfection, and multiservice classes can be supported with QoS guarantees.},
keywords={CAC unit;OFDM networks;QoS;call admission control unit;channel state information;dual decomposition-based resource allocation;imperfect CSI;network utility maximization;orthogonal frequency division multiple access networks;quality of service;subscriber diversity;OFDM modulation;diversity reception;frequency division multiple access;quality of service;resource allocation;telecommunication congestion control;wireless channels;},
doi={10.1109/TVT.2010.2044820},
ISSN={0018-9545},}