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A Control Channel Access Scheme for Clustered Multi-interface Multi-hop Cognitive Radio Networks  

Lee, Ji-Wun (서울대학교 전기컴퓨터공학부)
Jeon, Wha-Sook (서울대학교 전기컴퓨터공학부)
Jeong, Dong-Geun (한국외국어대학교 전자정보공학부)
Abstract
We propose the control channel access scheme for multi-interface multi-hop cognitive radio (CR) environment having a cluster structure. Due to the difficulty of obtaining common channels across the entire CR network, most multi-interface multi-hop CR networks put the control channel outside the CR bandwidth and dedicate one network interface to it in order to exchange the control information such as the activation of licensed users. However, this will be the waste of the network interface. Our focus is how to alternate between the control and the data channel without multichannel hidden node problem under the cluster structure where CR nodes connect with neighbors through multiple data channels. By using simulation, we evaluate the performance of the proposed scheme. The results show that the proposed scheme achieves higher network throughput than the dedicated scheme where one network interface card should dedicate to the control channel and cannot be used for data transmission.
Keywords
cognitive radio; mesh networks; control channel access; multi-interface multi-hop networks;
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