Opportunistic contention-based feedback protocol for downlink OFDMA systems with mixed traffic

An opportunistic feedback protocol is proposed for orthogonal frequency division multiple access (OFDMA) systems with mixed realtime (RT) and non-realtime (NRT) traffic. This protocol allocates a dedicated feedback channel for each RT user, while it allows all NRT users to compete to send feedback v...

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Main Authors:	Patachaianand, Rachod, Sandrasegaran, Kumbesan, Mohd. Ramli, Huda Adibah, Basukala, Riyaj
Format:	Conference or Workshop Item
Language:	English English
Published:	Springer Link 2009
Subjects:	TK5101 Telecommunication. Including telegraphy, radio, radar, television
Online Access:	http://irep.iium.edu.my/6581/ http://irep.iium.edu.my/6581/ http://irep.iium.edu.my/6581/ http://irep.iium.edu.my/6581/1/6581_Opportunistic%20contention_complete.pdf http://irep.iium.edu.my/6581/2/6581_Opportunistic%20contention_SCOPUS.pdf

id	iium-6581
recordtype	eprints
spelling	iium-65812017-08-21T09:06:47Z http://irep.iium.edu.my/6581/ Opportunistic contention-based feedback protocol for downlink OFDMA systems with mixed traffic Patachaianand, Rachod Sandrasegaran, Kumbesan Mohd. Ramli, Huda Adibah Basukala, Riyaj TK5101 Telecommunication. Including telegraphy, radio, radar, television An opportunistic feedback protocol is proposed for orthogonal frequency division multiple access (OFDMA) systems with mixed realtime (RT) and non-realtime (NRT) traffic. This protocol allocates a dedicated feedback channel for each RT user, while it allows all NRT users 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. The probability that NRT users attempt to send feedback is based on two parameters: a channel quality threshold, and the number of subcarriers (or clusters) whose channel quality is above the threshold. Simulation results demonstrate that allocating a dedicated feedback channel for RT user improves the achievable throughput significantly 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. Springer Link 2009 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/6581/1/6581_Opportunistic%20contention_complete.pdf application/pdf en http://irep.iium.edu.my/6581/2/6581_Opportunistic%20contention_SCOPUS.pdf Patachaianand, Rachod and Sandrasegaran, Kumbesan and Mohd. Ramli, Huda Adibah and Basukala, Riyaj (2009) Opportunistic contention-based feedback protocol for downlink OFDMA systems with mixed traffic. In: 10th Pacific-Rim Conference on Multimedia (PCM 2009), 15-18 December 2009, Bangkok, Thailand. http://dx.doi.org/10.1007/978-3-642-10467-1 10.1007/978-3-642-10467-1_115
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	TK5101 Telecommunication. Including telegraphy, radio, radar, television
spellingShingle	TK5101 Telecommunication. Including telegraphy, radio, radar, television Patachaianand, Rachod Sandrasegaran, Kumbesan Mohd. Ramli, Huda Adibah Basukala, Riyaj Opportunistic contention-based feedback protocol for downlink OFDMA systems with mixed traffic
description	An opportunistic feedback protocol is proposed for orthogonal frequency division multiple access (OFDMA) systems with mixed realtime (RT) and non-realtime (NRT) traffic. This protocol allocates a dedicated feedback channel for each RT user, while it allows all NRT users 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. The probability that NRT users attempt to send feedback is based on two parameters: a channel quality threshold, and the number of subcarriers (or clusters) whose channel quality is above the threshold. Simulation results demonstrate that allocating a dedicated feedback channel for RT user improves the achievable throughput significantly 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.
format	Conference or Workshop Item
author	Patachaianand, Rachod Sandrasegaran, Kumbesan Mohd. Ramli, Huda Adibah Basukala, Riyaj
author_facet	Patachaianand, Rachod Sandrasegaran, Kumbesan Mohd. Ramli, Huda Adibah Basukala, Riyaj
author_sort	Patachaianand, Rachod
title	Opportunistic contention-based feedback protocol for downlink OFDMA systems with mixed traffic
title_short	Opportunistic contention-based feedback protocol for downlink OFDMA systems with mixed traffic
title_full	Opportunistic contention-based feedback protocol for downlink OFDMA systems with mixed traffic
title_fullStr	Opportunistic contention-based feedback protocol for downlink OFDMA systems with mixed traffic
title_full_unstemmed	Opportunistic contention-based feedback protocol for downlink OFDMA systems with mixed traffic
title_sort	opportunistic contention-based feedback protocol for downlink ofdma systems with mixed traffic
publisher	Springer Link
publishDate	2009
url	http://irep.iium.edu.my/6581/ http://irep.iium.edu.my/6581/ http://irep.iium.edu.my/6581/ http://irep.iium.edu.my/6581/1/6581_Opportunistic%20contention_complete.pdf http://irep.iium.edu.my/6581/2/6581_Opportunistic%20contention_SCOPUS.pdf
first_indexed	2023-09-18T20:15:37Z
last_indexed	2023-09-18T20:15:37Z
_version_	1777407767074570240

Opportunistic contention-based feedback protocol for downlink OFDMA systems with mixed traffic

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