ZHANG Lei, SONG Tiecheng, WU Ming, BAO Xu, GUO Jie, HU Jing. Traffic-Adaptive Proactive Spectrum Handoff Strategy for Graded Secondary Users in Cognitive Radio Networks[J]. Chinese Journal of Electronics, 2015, 24(4): 844-851. doi: 10.1049/cje.2015.10.030
Citation: ZHANG Lei, SONG Tiecheng, WU Ming, BAO Xu, GUO Jie, HU Jing. Traffic-Adaptive Proactive Spectrum Handoff Strategy for Graded Secondary Users in Cognitive Radio Networks[J]. Chinese Journal of Electronics, 2015, 24(4): 844-851. doi: 10.1049/cje.2015.10.030

Traffic-Adaptive Proactive Spectrum Handoff Strategy for Graded Secondary Users in Cognitive Radio Networks

doi: 10.1049/cje.2015.10.030
Funds:  This work is supported by the National Natural Science Foundation of China (No.61271207, No.61372104), Program Sponsored for Scientific Innovation Research of College Graduate in Jiangsu Province (No.CXZZ13-0100), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No.12KJB510002) and Natural Science Foundation of Jiangsu Province (No.BK20130530).
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  • Corresponding author: SONG Tiecheng (correspondingauthor) received the Ph.D. degree in communicationand information system fromSoutheast University in 2006, and now is aprofessor and a doctoral advisor in SoutheastUniversity. His research interests includecognitive radio technology, wirelesssensor networks, and mobile communications.(Email: songtc@seu.edu.cn)
  • Received Date: 2014-01-23
  • Rev Recd Date: 2014-05-14
  • Publish Date: 2015-10-10
  • In order to meet different delay requirements of various communication services in Cognitive radio (CR) networks, Secondary users (SUs) are divided into two classes according to the priority of accessing to spectrum in this paper. Based on the proactive spectrum handoff scheme, the Preemptive resume priority (PRP) M/G/1 queueing is used to characterize multiple spectrum handoffs under two different spectrum handoff strategies. The traffic-adaptive spectrum handoff strategy is proposed for graded SUs so as to minimize the average cumulative handoff delay. Simulation results not only verify that our theoretical analysis is valid, but also show that the strategy we proposed can reduce the average cumulative handoff delay evidently. The effect of service rate on the proposed spectrum switching point and the admissible access region are provided.
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