Research Article
Spectrum-Sculpting-Aided PU-Claiming in OFDMA Cognitive Radio Networks
@INPROCEEDINGS{10.1007/978-3-319-24540-9_24, author={Yi Ren and Chao Wang and Dong Liu and Fuqiang Liu and Erwu Liu}, title={Spectrum-Sculpting-Aided PU-Claiming in OFDMA Cognitive Radio Networks}, proceedings={Cognitive Radio Oriented Wireless Networks. 10th International Conference, CROWNCOM 2015, Doha, Qatar, April 21--23, 2015, Revised Selected Papers}, proceedings_a={CROWNCOM}, year={2015}, month={10}, keywords={Spectrum sculpting Cognitive radio Multi-QoS OFDM PU-claiming}, doi={10.1007/978-3-319-24540-9_24} }- Yi Ren
Chao Wang
Dong Liu
Fuqiang Liu
Erwu Liu
Year: 2015
Spectrum-Sculpting-Aided PU-Claiming in OFDMA Cognitive Radio Networks
CROWNCOM
Springer
DOI: 10.1007/978-3-319-24540-9_24
Abstract
We consider a cognitive radio network where the primary user (PU) supports applications with multiple quality of service (QoS) requirements via orthogonal frequency division multiple access (OFDMA). To let the secondary users (SUs) be aware of PU’s QoS level, and hence provide PU with sufficient protection, we propose a spectrumsculpting- aided PU-claiming scheme that does not demand strict PUSU synchronization. Specifically, the PU deliberately inserts one zerosubcarrier into its subcarriers, the position of which represents the QoS requirement of the PU. Through a two-step sensing procedure, each SU then can estimate the QoS requirement and adjust its sensing or accessing strategies accordingly. Simulation results exhibit the advantages of the proposed scheme, in terms of both weighted received interference (WRI) and SU’s throughput.
