Cognitive radio system under mine and spectrum allocation method thereof based on fixed period repeated competition

Abstract

The invention relates to the field of radio communication and specifically relates to a spectrum allocation method for a cognitive radio system under a mine based on fixed period repeated competition. The interference of secondary users SUs to primary users PUs is reduced, and the competition among the SUs is reduced. According to a basic model employed by the radio system, spectrum information randomly released by the primary users and demands of the secondary users for spectrum resources are uniformly collected and managed by a spectrum management center arranged in the system; and a spectrum pool is used for collecting usage condition of the primary users for own spectrums in the current system. According to the system and the method, starting from an angle of repeated competition times, the cognitive radio system based on fixed period repeated competition and the spectrum allocation method thereof are provided; the probabilistic interference contradiction of the SUs and the PUs in the time domain aspect, the relationship between the number of the SUs and the idle channel number of the PUs in the space aspect, and the competition relationship among different SUs in the frequency domain aspect are analyzed. The system and the method are applied to radio communication in certain section of tunnel environment of a mine.

Description

technical field [0001] The invention relates to a method for allocating frequency spectrum of a cognitive radio system, in particular to a method for allocating frequency spectrum of an underground cognitive radio system with multiple competitions in a fixed period. Background technique [0002] The existing communication system is a fixed mode of communication, which may be suitable for a certain section of the mine tunnel environment, but the communication effect of the entire mine is poor, and there are disadvantages such as poor reliability and high cost. Mine production has an urgent requirement to establish a good wireless communication system. The contradiction in using spectrum holes is the conflict between the primary user (PU) and the cognitive user (secondary user, SU). In order to ensure the normal communication of the primary user in its frequency band, when the primary user returns, the cognitive user The known user needs to release the channel it occupies and...

AI Technical Summary

Problems solved by technology

However, if the change characteristics of the idle spectrum in the time domain, the number of cognitive users in the space domain, and the idle channel of the primary user in the frequency domain are not considered, there will be a problem that the allocated channels cannot meet the actual needs of cognitive users. , affecting the feasibility of the system

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