Frequency spectrum cooperative sharing method based on master user estimation in cognitive radio

Abstract

The invention discloses a frequency spectrum cooperative sharing method based on master user estimation in cognitive radio. The method comprises the steps that multiple frequency spectrum owners and multiple secondary users form a cognitive radio network, and alternative secondary user cooperation objects are distributed to master users; the master users conduct PU estimation on the lowest type of the secondary users and propose cooperation agreements according to the type; the secondary users select the cooperative master users according to the agreements and feed back the agreements to the master users; the master users update the cooperation agreements till the benefits are maximized. By means of the frequency spectrum cooperative sharing method, on one hand, the right to select cooperation or not is given to the secondary users; on the other hand, the fairness among the master users is guaranteed, and stable overall suboptimum answers in frequency spectrum cooperative sharing can be obtained.

Description

technical field [0001] The present invention relates to a method in the technical field of communication, in particular to a method for cooperative sharing of spectrum between a primary user and a secondary user in a cognitive radio. Background technique [0002] On the one hand, with the widespread use of radio, spectrum occupation makes spectrum resources more and more precious. On the other hand, with the continuous development of radio technology, more flexible access methods are provided for mobile users. In a cognitive radio network, it is generally divided into frequency band owners (such as various telecom operators), primary users (PU) and secondary users (SU). Primary users are authorized users who can access the channel at any time without any interference. Secondary users are unauthorized users who do not have access and service quality guarantees, but have greater flexibility to choose different operators to access. Therefore, based on cognitive radio technol...

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Problems solved by technology

Secondary users are unauthorized users and do not have access and service quality guarantees, but have greater flexibility to choose different operators to access

[0004] However, the above technology has not considered the problem that the relay power of the SU is variable.

In addition, in their work, the SU's opportunity to use spectrum resources is irrelevant to the contribution made by its relay to the PU, and the SU selected by the PU as the relay has no right to choose whether to cooperate or not, that is, Once selected, SUs are forced to help PUs relay whether they want to or not, these assumptions don't match reality

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