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Radio resource allocation schemes for relay assisted OFDMA dynamic spectrum allocation systems

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNPaper

Published
Publication date06/2012
Host publicationWireless Advanced (WiAd), 2012
PublisherIEEE
Pages69-73
Number of pages5
ISBN (Print)9781457721939
Original languageEnglish
Event2012 Wireless Advanced (WiAd) (Formerly known as SPWC) - London, United Kingdom, United Kingdom
Duration: 25/06/201227/06/2012

Conference

Conference2012 Wireless Advanced (WiAd) (Formerly known as SPWC)
CountryUnited Kingdom
Period25/06/1227/06/12

Conference

Conference2012 Wireless Advanced (WiAd) (Formerly known as SPWC)
CountryUnited Kingdom
Period25/06/1227/06/12

Abstract

In this paper, we investigate the downlink radio resource allocation in underlay relay assisted OFDMA spectrum sharing system. Our main objective is to maximize the secondary service sum rate. Two cases are presented to manage the impact of secondary service activity on the primary network through radio resource allocation. In the first (second) case we assume that the channel distribution information (CDI) (the channel side information (CSI)) for the channel between the secondary transmitter and primary receiver is available at the secondary base station (BS). Simulation studies are also conducted to compare the performance of the two above mentioned cases which indicate that in case of uncertain CSI, it is more efficient to use CDI and let the collision probability be managed through corresponding optimized radio resource allocation. An interesting advantage for this approach is eliminating the need to have feedback signalling between primary and secondary systems.