Utilization and fairness in spectrum assignment for opportunistic spectrum access
Mobile Networks and Applications
NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
Price-based spectrum-allocation relay routing in cognitive radio networks
ICICS'09 Proceedings of the 7th international conference on Information, communications and signal processing
Hi-index | 0.00 |
Cognitive radio (CR) is an emerging communication paradigm to address spectrum insufficiency by opportunistically accessing inactive spectrum. Normally, there are several distinct wireless systems co-existing in the same area. Hence, how to efficiently share the available spectrum among these systems becomes a significant challenge in CR. In this paper, a spectrum-heterogeneity-based hierarchical spectrum sharing network (HSSN) is proposed for CR. In HSSN, available spectrum bands are classified into two categories. To enable the infrastructure, spectrum identification and classification are developed, and the strategies on how to effectively utilize these two types of spectrum are also discussed. In addition, the associated protocol is exploited for spectrum selection and route forwarding. Analysis and simulation results indicate that the HSSN can significantly improve spectrum utilization and provide a considerable extension to the available spectrum.