Is a Multi-Hop Relay Scheme Gainful in an IEEE 802.22-Based Cognitive Radio System?

Jungchae SHIN
Dong-Kyu LEE
Ho-Shin CHO

IEICE TRANSACTIONS on Communications   Vol.E92-B    No.11    pp.3528-3532
Publication Date: 2009/11/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.3528
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
cognitive radio,  multi-hop,  relay,  radio resource management,  

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In this paper, we formulate a plan to operate multi-hop relays in IEEE 802.22-based cognitive radio (CR) systems and evaluate system performance to consider the propriety of a multi-hop relay scheme in CR systems. A centralized radio resource management and a simple deployment of relay stations (RSs) are assessed to make relay operations feasible under CR conditions. Simulation results show that the proposed multi-hop relay scheme significantly increases system throughput compared to a no-relay CR system as the incumbent user (IU) traffic gets heavier. Furthermore, the optimal number of hops can be determined given the traffic conditions.