NDLI: A Dual-Decomposition-Based Resource Allocation for OFDMA Networks With Imperfect CSI

Content Provider	IEEE Xplore Digital Library
Author	Awad, M.K. Mahinthan, V. Mehrjoo, M. Xuemin Shen Mark, J.W.
Copyright Year	1967
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.
Sponsorship	IEEE Vehicular Technology Society
Starting Page	2394
Ending Page	2403
Page Count	10
File Size	346676
File Format	PDF
ISSN	00189545
Volume Number	59
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resource management Bandwidth Throughput Intersymbol interference Utility programs Aggregates Wireless networks Channel state information Availability Radio spectrum management resource management Broadband wireless access networks call-admission control dual decomposition imperfect channel state information orthogonal frequency-division multiple-access (OFDMA)
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Automotive Engineering Computer Networks and Communications Electrical and Electronic Engineering Aerospace Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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