Research Article
Optimal admission control in cognitive radio networks
@INPROCEEDINGS{10.1109/CROWNCOM.2009.5189133, author={Diego Pacheco-Paramo and Vicent Pla and Jorge Martinez-Bauset}, title={Optimal admission control in cognitive radio networks}, proceedings={4th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2009}, month={8}, keywords={}, doi={10.1109/CROWNCOM.2009.5189133} }- Diego Pacheco-Paramo
Vicent Pla
Jorge Martinez-Bauset
Year: 2009
Optimal admission control in cognitive radio networks
CROWNCOM
IEEE
DOI: 10.1109/CROWNCOM.2009.5189133
Abstract
We study a cognitive radio system in which the spectrum handover technique is applied by secondary users when they have to vacate a channel due to a primary user arrival. In order to limit the forced termination probability of secondary users a fractional guard channel reservation scheme is applied to give priority to spectrum handovers over new arrivals. We show that, contrary to what has been suggested, the reservation parameter cannot be adequately adjusted as a result of maximizing the throughput of secondary users. Instead we propose and explore two alternative configuration methods. The proposed methods are based on optimization problems that target the existing trade-off between blocking new sessions of secondary users and dropping ongoing ones. Additionally in our numerical experiments we identify some interesting and counterintuitive phenomena.