Utilization and fairness in spectrum assignment for opportunistic spectrum access
Mobile Networks and Applications
Allocating dynamic time-spectrum blocks in cognitive radio networks
Proceedings of the 8th ACM international symposium on Mobile ad hoc networking and computing
Analysis and design of cognitive radio networks and distributed radio resource management algorithms
Analysis and design of cognitive radio networks and distributed radio resource management algorithms
Comparison of Multichannel MAC Protocols
IEEE Transactions on Mobile Computing
Efficient Discovery of Spectrum Opportunities with MAC-Layer Sensing in Cognitive Radio Networks
IEEE Transactions on Mobile Computing
CRAHNs: Cognitive radio ad hoc networks
Ad Hoc Networks
Game Theory and Cognitive Radio Based Wireless Networks
KES-AMSTA '09 Proceedings of the Third KES International Symposium on Agent and Multi-Agent Systems: Technologies and Applications
A Novel Spectrum Allocation Mechanism Based on Graph Coloring and Bidding Theory
CINC '09 Proceedings of the 2009 International Conference on Computational Intelligence and Natural Computing - Volume 01
Proceedings of the 12th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
Search: A routing protocol for mobile cognitive radio ad-hoc networks
Computer Communications
Efficient MAC in cognitive radio systems: a game-theoretic approach
IEEE Transactions on Wireless Communications
Dynamic spectrum management for cognitive radio: an overview
Wireless Communications & Mobile Computing - Cognitive Radio and Advanced Spectrum Management
A non-selfish and distributed channel selection scheme for cognitive radio ad hoc networks
Proceedings of the 13th ACM international conference on Modeling, analysis, and simulation of wireless and mobile systems
Evaluation of quality of experience for video streaming over dynamic spectrum access systems
WOWMOM '10 Proceedings of the 2010 IEEE International Symposium on A World of Wireless, Mobile and Multimedia Networks (WoWMoM)
Analysis of channel fragmentation in dynamic spectrum access networks
Analysis of channel fragmentation in dynamic spectrum access networks
Optimal spectrum sensing framework for cognitive radio networks
IEEE Transactions on Wireless Communications
Full length article: Proactive channel access in dynamic spectrum networks
Physical Communication
Activity pattern impact of primary radio nodes on channel selection strategies
Proceedings of the 4th International Conference on Cognitive Radio and Advanced Spectrum Management
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In this paper, we consider the problem of spectrum sharing in CRAHNs and propose a distributed channel selection scheme. The key functionality of our proposal, best-fit channel selection (BFC) is that it accounts both the primary channel traffic activity and CR traffic activity in channel selection. We assume CR nodes have the capability of estimating the primary channel traffic activities. In BFC, each CR selects a channel among the primary user (PU) channels for transmission that best fits to its transmission time requirement. We compare the performance of BFC to the widely known longest idle time channel selection (LITC) scheme. In LITC, a CR selects the channel that has the longest expected idle time independent of its transmission needs. In a multi-user CRN, this may degrade the network performance compared to the non-selfish BFC approach. LITC is considered selfish since each CR aims to maximize its own benefit and thus wastes resources that may be utilized by other nodes in the network. BFC providing an efficient spectrum sharing mechanism implicitly mitigates the effect of spectrum fragmentation which is a significant issue degrading the CR spectrum utilization. In CRNs, spectrum may be fragmented in various dimensions, e.g. time and frequency, such that some parts of the spectrum can not be used although being idle. Our proposal provides a solution to the spectrum fragmentation issue in time dimension at the medium access control (MAC) layer. By a set of simulations, we highlight the performance improvement by BFC over the conventional LITC under various CR/PU traffic, number of CRs, estimation accuracy and buffering capability. Simulation results show that the performance of the proposed BFC is significantly superior to that of LITC in terms of probability of successful transmission, spectrum opportunity utilization and fragmentation.