Research Article
Proactive Channel Access in Dynamic Spectrum Networks
@INPROCEEDINGS{10.1109/CROWNCOM.2007.4549846, author={Lei Yang and Lili Cao and Haitao Zheng}, title={Proactive Channel Access in Dynamic Spectrum Networks}, proceedings={2nd International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2008}, month={6}, keywords={Availability Communication switching Computer science Delay Interference Maintenance Proposals Resumes Switches Wireless sensor networks}, doi={10.1109/CROWNCOM.2007.4549846} }- Lei Yang
Lili Cao
Haitao Zheng
Year: 2008
Proactive Channel Access in Dynamic Spectrum Networks
CROWNCOM
IEEE
DOI: 10.1109/CROWNCOM.2007.4549846
Abstract
Open Spectrum systems allow fast deployment of wireless technologies by reusing under-utilized pre-allocated spectrum channels, all with minimal impact on existing primary users. However, existing proposals take a reactive sense-andavoid approach to impulsively reconfigure spectrum usage based solely on the latest observations. This can result in frequent disruptions to operations of both primary and secondary users. In this paper, we propose a proactive spectrum access approach where secondary users utilize past channel histories to make predictions on future spectrum availability, and intelligently schedule channel usage in advance. We propose two channel selection and switching techniques to minimize disruptions to primary users and maintain reliable communication at secondary users. Experiments show that the proactive approach effectively reduces the interferences to primary users by up to 30%, and significantly decreases throughput jitters at secondary users.