NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
CoRaL--Policy Language and Reasoning Techniques for Spectrum Policies
POLICY '07 Proceedings of the Eighth IEEE International Workshop on Policies for Distributed Systems and Networks
Spectrum Sensing Framework for Cognitive Radio Networks
Wireless Personal Communications: An International Journal
Managing policies for dynamic spectrum access
AN'06 Proceedings of the First IFIP TC6 international conference on Autonomic Networking
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Spectrum sharing is one of the fundamental characteristics of cognitive radio networks. It assures proper spectrum allocation to and among different secondary systems without excessive harmful interference to the primary systems. Unaware secondary systems mainly employ centralized approaches for spectrum usage and sharing. A possible solution is to engage a policy system to perform the spectrum sharing functionalities. The timely varying environment conditions can be learned and utilized by the policy system that employs dynamically adaptable policies and enables effective utilization of spectrum opportunities. This paper uses a previously developed policy framework and presents extensions that support dynamic spectrum sharing functionalities for unaware secondary systems. The extensions of the policy system allow measurement based policy derivation and adaptation based on the wireless environment input. The spectrum sharing functionalities are presented in two scenarios, the first resembling static sharing policies derivation based on long term measurements and the other evaluating a newly proposed dynamic Priority Based Spectrum Sharing (PBSS) scheme.