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

Mokari, Nader and Navaie, Keivan (2012) Radio resource allocation schemes for relay assisted OFDMA dynamic spectrum allocation systems. In: Wireless Advanced (WiAd), 2012. IEEE, GBR, pp. 69-73. ISBN 9781457721939

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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.

Item Type:
Contribution in Book/Report/Proceedings
ID Code:
73174
Deposited By:
Deposited On:
05 Mar 2015 10:02
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 05:50