Two-stage central cooperative frequency spectrum sharing mechanism based on priority queue

Abstract

The invention discloses a two-stage central cooperative frequency spectrum sharing mechanism based on a priority queue. A cooperative cognitive radio network comprises a pair of master users and a plurality of cognitive user pairs, wherein the master users assist with authorized communication through recruiting the cognitive users as relay, and through management cooperation, the cooperative cognitive users coordinate access of other uncooperative cognitive users, so that a two-stage central management structure formed by the master users and the cooperative cognitive users is formed. According to the two-stage central cooperative frequency spectrum sharing mechanism, through designing selection and updating of the cooperative cognitive users and data transmission control with different priorities, dynamic and highly-efficient frequency spectrum sharing of many types of nodes can be implemented under the condition of stronger business randomness.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a priority queue-based two-level central cooperative frequency spectrum sharing mechanism. Background technique [0002] With the rapid development of wireless communication technology, the unallocated spectrum becomes less and less, and the problem of spectrum resource shortage becomes increasingly prominent. At the same time, according to the survey report of the US Federal Communications Commission (FCC), the spectrum utilization efficiency below 3GHz is in the range of 15% to 85%, while the spectrum utilization efficiency of 3-6GHz is less than 0.5%. The total spectrum utilization rate of the wireless system is below 10%. Compared with limited spectrum resources, low spectrum utilization causes serious waste of resources. Cognitive radio (CR), as a promising dynamic spectrum sharing technology, can effectively solve the above contradictions, and has received ex...

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Problems solved by technology

[0006] Aiming at the deficiencies of the existing technology, the present invention aims to provide a two-level central cooperative spectrum sharing mechanism based on priority queues, which solves the problem that resources of cooperative cognitive nodes and non-cooperative cognitive nodes are not fully considered in existing spectrum sharing schemes. Allocation issues, and the dynamic and efficient spectrum sharing of multiple types of nodes in the case of strong business randomness

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