Analysis of Opportunistic Contention-Based Feedback Protocol for Downlink OFDMA

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Show simple item record Sandrasegaran, Kumbesan en_US Patachaianand, Rachod en_US Madani, Faisal en_US Lin, Cheng-Chung en_US
dc.contributor.editor Nurul I Sarkar; Adnan Al-Anbuky en_US 2012-02-02T11:06:40Z 2012-02-02T11:06:40Z 2010 en_US
dc.identifier 2010001136 en_US
dc.identifier.citation Sandrasegaran Kumbesan et al. 2010, 'Analysis of Opportunistic Contention-Based Feedback Protocol for Downlink OFDMA', , IEEE, Auckland, New Zealand, , pp. 72-77. en_US
dc.identifier.issn 978-1-4244-8172-9 en_US
dc.identifier.other E1 en_US
dc.description.abstract In this paper, a new opportunistic feedback protocol for orthogonal frequency division multiple access (OFDMA) systems with mixed realtime (RT) and non-realtime (NRT) traffic is proposed and analysed. Based on the proposed feedback mechanism, a dedicated feedback channel is allocated for each RT user, while shared feedback channels are available for all NRT users. NRT users have to compete to send feedback via a contention-based random access feedback channel. The proposed feedback protocol requires a fixed amount of resource to carry feedback from all RT users and some selected NRT users. Simulation results show that the achievable throughput can be improved significantly by allocating a dedicated feedback channel for RT user compared with allocating a dedicated traffic channel. For NRT users, the achievable sum-rate of the proposed protocol when the number of users is moderate (20-50 users) approaches the ideal case when the channel quality of all users is known at the base station. The sum-rate also is close to the ideal case when the number contention minislots per subcarrier is as low as 2 minislot per subcarrier. en_US
dc.language English en_US
dc.publisher IEEE en_US
dc.relation.isbasedon en_US
dc.title Analysis of Opportunistic Contention-Based Feedback Protocol for Downlink OFDMA en_US
dc.parent Australasian Telecommunication Networks and Applications Conference (ATNAC), 2010 en_US
dc.journal.volume en_US
dc.journal.number en_US
dc.publocation Auckland, New Zealand en_US
dc.identifier.startpage 72 en_US
dc.identifier.endpage 77 en_US FEIT.Faculty of Engineering & Information Technology en_US
dc.conference Verified OK en_US
dc.for 080503 en_US
dc.personcode 000544 en_US
dc.personcode 997450 en_US
dc.personcode 110542 en_US
dc.personcode 10931347 en_US
dc.percentage 100 en_US Networking and Communications en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom Australasian Telecommunication Networks and Applications Conference en_US 20101031 en_US
dc.location.activity Auckland, New Zealand en_US
dc.description.keywords Contention , Limited feedback , Multiuser systems , OFDMA , Opportunistic scheduling en_US
dc.staffid en_US

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