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Article: Cross-layer design for OFDMA wireless systems with heterogeneous delay requirements

TitleCross-layer design for OFDMA wireless systems with heterogeneous delay requirements
Authors
KeywordsDelay-sensitive cross-layer scheduling
Heterogeneous applications
Orthogonal frequency division multiple access (OFDMA)
Power control
Subcarrier allocation
Issue Date2007
PublisherIEEE.
Citation
Ieee Transactions On Wireless Communications, 2007, v. 6 n. 8, p. 2872-2880 How to Cite?
AbstractThis paper proposes a cross-layer scheduling scheme for OFDMA wireless systems with heterogeneous delay requirements. We shall focus on the cross-layer design which takes into account both queueing theory and information theory in modeling the system dynamics. We propose a delay-sensitive cross-layer design, which determines the optimal subcarrier allocation and power allocation policies to maximize the total system throughput, subject to the individual user's delay constraint and total base station transmit power constraint. The delay-sensitive power allocation was found to be multilevel water-filling in which urgent users have higher water-filling levels. The delay-sensitive subcarrier allocation strategy has linear complexity with respect to number of users and number of subcarriers. Simulation results show that substantial throughput gain is obtained while satisfying the delay constraints when the delay-sensitive jointly optimal power and subcarrier allocation policy is adopted. © 2007 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/57471
ISSN
2015 Impact Factor: 2.925
2015 SCImago Journal Rankings: 2.340
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHui, DSWen_HK
dc.contributor.authorLau, VKNen_HK
dc.contributor.authorLam, WHen_HK
dc.date.accessioned2010-04-12T01:37:30Z-
dc.date.available2010-04-12T01:37:30Z-
dc.date.issued2007en_HK
dc.identifier.citationIeee Transactions On Wireless Communications, 2007, v. 6 n. 8, p. 2872-2880en_HK
dc.identifier.issn1536-1276en_HK
dc.identifier.urihttp://hdl.handle.net/10722/57471-
dc.description.abstractThis paper proposes a cross-layer scheduling scheme for OFDMA wireless systems with heterogeneous delay requirements. We shall focus on the cross-layer design which takes into account both queueing theory and information theory in modeling the system dynamics. We propose a delay-sensitive cross-layer design, which determines the optimal subcarrier allocation and power allocation policies to maximize the total system throughput, subject to the individual user's delay constraint and total base station transmit power constraint. The delay-sensitive power allocation was found to be multilevel water-filling in which urgent users have higher water-filling levels. The delay-sensitive subcarrier allocation strategy has linear complexity with respect to number of users and number of subcarriers. Simulation results show that substantial throughput gain is obtained while satisfying the delay constraints when the delay-sensitive jointly optimal power and subcarrier allocation policy is adopted. © 2007 IEEE.en_HK
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.relation.ispartofIEEE Transactions on Wireless Communicationsen_HK
dc.rights©2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectDelay-sensitive cross-layer schedulingen_HK
dc.subjectHeterogeneous applicationsen_HK
dc.subjectOrthogonal frequency division multiple access (OFDMA)en_HK
dc.subjectPower controlen_HK
dc.subjectSubcarrier allocationen_HK
dc.titleCross-layer design for OFDMA wireless systems with heterogeneous delay requirementsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1536-1276&volume=6&issue=8&spage=2872&epage=2880&date=2007&atitle=Cross-layer+design+for+OFDMA+wireless+systems+with+heterogeneous+delay+requirementsen_HK
dc.identifier.emailLam, WH:whlam@eee.hku.hken_HK
dc.identifier.authorityLam, WH=rp00136en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/TWC.2007.05716en_HK
dc.identifier.scopuseid_2-s2.0-34548106007en_HK
dc.identifier.hkuros134240-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34548106007&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume6en_HK
dc.identifier.issue8en_HK
dc.identifier.spage2872en_HK
dc.identifier.epage2880en_HK
dc.identifier.isiWOS:000248671400019-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridHui, DSW=19638537000en_HK
dc.identifier.scopusauthoridLau, VKN=7005811464en_HK
dc.identifier.scopusauthoridLam, WH=7203021916en_HK

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