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Conference Paper: Cross layer designs for OFDMA wireless systems with heterogeneous delay requirements

TitleCross layer designs for OFDMA wireless systems with heterogeneous delay requirements
Authors
KeywordsCommunications
Issue Date2006
PublisherIEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000104
Citation
Ieee International Conference On Communications, 2006, v. 12, p. 5325-5330 How to Cite?
AbstractThis paper investigates a cross layer scheduling scheme for OFDMA wireless system with heterogeneous delay requirements. Unlike most existing cross layer designs which take a decoupling approach, our design considers both queueing theory and information theory in modeling the system dynamics. The cross layer design is formulated as an optimization of total system throughput, subject to individual user's delay constraint and total base station transmit power constraint. The optimal scheduling algorithm for the delay-sensitive cross layer optimization is to dynamically allocate radio resources based on users' channel state information, source statistics and delay requirements. Specifically, optimal power allocation was found to be multilevel water-filling where urgent users have higher water-filling levels, while optimal subcarrier allocation strategy is shown to be achievable by low complexity greedy algorithm. Simulation results also show the proposed jointly optimal power and subcarrier allocation policy can provide substantial throughput gain with all delay constraints being satisfied. © 2006 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/45935
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorHui, DSWen_HK
dc.contributor.authorLau, VKNen_HK
dc.contributor.authorLam, WHen_HK
dc.date.accessioned2007-10-30T06:38:52Z-
dc.date.available2007-10-30T06:38:52Z-
dc.date.issued2006en_HK
dc.identifier.citationIeee International Conference On Communications, 2006, v. 12, p. 5325-5330en_HK
dc.identifier.issn0536-1486en_HK
dc.identifier.urihttp://hdl.handle.net/10722/45935-
dc.description.abstractThis paper investigates a cross layer scheduling scheme for OFDMA wireless system with heterogeneous delay requirements. Unlike most existing cross layer designs which take a decoupling approach, our design considers both queueing theory and information theory in modeling the system dynamics. The cross layer design is formulated as an optimization of total system throughput, subject to individual user's delay constraint and total base station transmit power constraint. The optimal scheduling algorithm for the delay-sensitive cross layer optimization is to dynamically allocate radio resources based on users' channel state information, source statistics and delay requirements. Specifically, optimal power allocation was found to be multilevel water-filling where urgent users have higher water-filling levels, while optimal subcarrier allocation strategy is shown to be achievable by low complexity greedy algorithm. Simulation results also show the proposed jointly optimal power and subcarrier allocation policy can provide substantial throughput gain with all delay constraints being satisfied. © 2006 IEEE.en_HK
dc.format.extent7332682 bytes-
dc.format.extent3954 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherIEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000104en_HK
dc.relation.ispartofIEEE International Conference on Communicationsen_HK
dc.rights©2006 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.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectCommunicationsen_HK
dc.titleCross layer designs for OFDMA wireless systems with heterogeneous delay requirementsen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1044-4556&volume=12&spage=5325&epage=5330&date=2006&atitle=Cross+Layer+Designs+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/ICC.2006.255507en_HK
dc.identifier.scopuseid_2-s2.0-42549132706en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-42549132706&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume12en_HK
dc.identifier.spage5325en_HK
dc.identifier.epage5330en_HK
dc.identifier.scopusauthoridHui, DSW=19638537000en_HK
dc.identifier.scopusauthoridLau, VKN=7005811464en_HK
dc.identifier.scopusauthoridLam, WH=7203021916en_HK

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