Wireless Personal Communications

, Volume 74, Issue 3, pp 1081–1097 | Cite as

Dynamic Spectrum Sharing for OFDMA-Based Multi-hop Cognitive Radio Networks with Priority



In this paper, we propose a resource assignment scheme of a secondary user (SU) for a multi-hop cognitive radio network. In multi-hop networks, since each link has different SNR because of their different distance between stations and multipath fading, the link of the smallest SNR is the bottleneck. For overcoming this problem, it is proposed to give a priority to each link based on the link SNR and to assign the resource blocks (RBs) in ordering of instantaneous SNR on the link. This link priority information is shared among nodes through a control channel. Then, we assign the selected SU RB to each SU node according to the SNR ordering with distributed manner. We confirm the effectiveness of the proposed SU RB assignment by using computer simulation.


Cognitive radio Multi-hop network OFDMA Resource allocation 


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Advanced Wireless Communication Research Center(AWCC)The University of Electro-CommunicationsTokyoJapan
  2. 2.Department of Electrical and Electronic EngineeringShinshu UniversityNaganoJapan

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