Cooperative Spectrum Sharing Method Based on Primary User Estimation in Cognitive Radio

Abstract

The invention discloses a cooperative sharing method based on primary user estimation in cognitive radio. Object: primary user PU estimates the lowest type of secondary user, and proposes a cooperation agreement according to the type; secondary user selects a cooperative primary user according to the agreement, and feeds back to the primary user; primary user updates the cooperation agreement until the benefit is maximized. On the one hand, the present invention gives secondary users the right to choose whether to cooperate or not, on the other hand, ensures the fairness among primary users, and can obtain a stable global suboptimal solution in spectrum cooperative sharing.

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...

AI Technical Summary

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

Images