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Article: Dynamic subcarrier allocation for real-Time traffic over multiuser OFDM systems

TitleDynamic subcarrier allocation for real-Time traffic over multiuser OFDM systems
Authors
Issue Date2009
PublisherHindawi Publishing Corp. The Journal's web site is located at http://www.hindawi.com/journals/wcn/index.html
Citation
Eurasip Journal On Wireless Communications And Networking, 2009, v. 2009 How to Cite?
AbstractA dynamic resource allocation algorithm to satisfy the packet delay requirements for real-time services, while maximizing the system capacity in multiuser orthogonal frequency division multiplexing (OFDM) systems is introduced. Our proposed cross-layer algorithm, called Dynamic Subcarrier Allocation algorithm for Real-time Traffic (DSA-RT), consists of two interactive components. In the medium access control (MAC) layer, the users' expected transmission rates in terms of the number of subcarriers per symbol and their corresponding transmission priorities are evaluated. With the above MAC-layer information and the detected subcarriers' channel gains, in the physical (PHY) layer, a modified Kuhn-Munkres algorithm is developed to minimize the system power for a certain subcarrier allocation, then a PHY-layer resource allocation scheme is proposed to optimally allocate the subcarriers under the system signal-to-noise ratio (SNR) and power constraints. In a system where the number of mobile users changes dynamically, our developed MAC-layer access control and removal schemes can guarantee the quality of service (QoS) of the existing users in the system and fully utilize the bandwidth resource. The numerical results show that DSA-RT significantly improves the system performance in terms of the bandwidth efficiency and delay performance for real-time services. © 2009 Fanglei Sun et al.
Persistent Identifierhttp://hdl.handle.net/10722/155536
ISSN
2015 SCImago Journal Rankings: 0.326
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorSun, Fen_US
dc.contributor.authorYou, Men_US
dc.contributor.authorLi, VOKen_US
dc.date.accessioned2012-08-08T08:33:59Z-
dc.date.available2012-08-08T08:33:59Z-
dc.date.issued2009en_US
dc.identifier.citationEurasip Journal On Wireless Communications And Networking, 2009, v. 2009en_US
dc.identifier.issn1687-1472en_US
dc.identifier.urihttp://hdl.handle.net/10722/155536-
dc.description.abstractA dynamic resource allocation algorithm to satisfy the packet delay requirements for real-time services, while maximizing the system capacity in multiuser orthogonal frequency division multiplexing (OFDM) systems is introduced. Our proposed cross-layer algorithm, called Dynamic Subcarrier Allocation algorithm for Real-time Traffic (DSA-RT), consists of two interactive components. In the medium access control (MAC) layer, the users' expected transmission rates in terms of the number of subcarriers per symbol and their corresponding transmission priorities are evaluated. With the above MAC-layer information and the detected subcarriers' channel gains, in the physical (PHY) layer, a modified Kuhn-Munkres algorithm is developed to minimize the system power for a certain subcarrier allocation, then a PHY-layer resource allocation scheme is proposed to optimally allocate the subcarriers under the system signal-to-noise ratio (SNR) and power constraints. In a system where the number of mobile users changes dynamically, our developed MAC-layer access control and removal schemes can guarantee the quality of service (QoS) of the existing users in the system and fully utilize the bandwidth resource. The numerical results show that DSA-RT significantly improves the system performance in terms of the bandwidth efficiency and delay performance for real-time services. © 2009 Fanglei Sun et al.en_US
dc.languageengen_US
dc.publisherHindawi Publishing Corp. The Journal's web site is located at http://www.hindawi.com/journals/wcn/index.htmlen_US
dc.relation.ispartofEurasip Journal on Wireless Communications and Networkingen_US
dc.titleDynamic subcarrier allocation for real-Time traffic over multiuser OFDM systemsen_US
dc.typeArticleen_US
dc.identifier.emailLi, VOK:vli@eee.hku.hken_US
dc.identifier.authorityLi, VOK=rp00150en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1155/2009/298451en_US
dc.identifier.scopuseid_2-s2.0-68949119584en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-68949119584&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume2009en_US
dc.identifier.isiWOS:000268252200001-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridSun, F=8267663500en_US
dc.identifier.scopusauthoridYou, M=24475921300en_US
dc.identifier.scopusauthoridLi, VOK=7202621685en_US

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