Analysis of opportunistic contention-based feedback protocol for downlink OFDMA

Sandrasegaran, K; Patachaianand, R; Mohd Madani, F; Lin, CC

Analysis of opportunistic contention-based feedback protocol for downlink OFDMA

Sandrasegaran, K

Patachaianand, R Mohd Madani, F Lin, CC

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Publication Type:: Conference Proceeding
Citation:: 2010 Australasian Telecommunication Networks and Applications Conference, ATNAC 2010, 2010, pp. 72 - 77
Issue Date:: 2010-12-01

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Field	Value	Language
dc.contributor.author	Sandrasegaran, K https://orcid.org/0000-0003-1270-5756	en_US
dc.contributor.author	Patachaianand, R	en_US
dc.contributor.author	Mohd Madani, F	en_US
dc.contributor.author	Lin, CC	en_US
dc.date.issued	2010-12-01	en_US
dc.identifier.citation	2010 Australasian Telecommunication Networks and Applications Conference, ATNAC 2010, 2010, pp. 72 - 77	en_US
dc.identifier.isbn	9781424481729	en_US
dc.identifier.uri	http://hdl.handle.net/10453/16101
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. ©2010 IEEE.	en_US
dc.relation.ispartof	2010 Australasian Telecommunication Networks and Applications Conference, ATNAC 2010	en_US
dc.relation.isbasedon	10.1109/ATNAC.2010.5680259	en_US
dc.title	Analysis of opportunistic contention-based feedback protocol for downlink OFDMA	en_US
dc.type	Conference Proceeding
utslib.for	080503 Networking and Communications	en_US
dc.location.activity	Auckland, New Zealand	en_US
dc.location.activity	Auckland, NEW ZEALAND
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CRIN - Realtime Information Networks
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US

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. ©2010 IEEE.

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http://hdl.handle.net/10453/16101