Stackelberg game power control method based on interruption probability constraint in cognitive radio network

Abstract

The invention discloses a Stackelberg game power control method based on interruption probability constraint in the cognitive radio network. A double-layer network is established. A main user serves as a leader in a model, and an interference price is set for a cognitive user; and the cognitive user serves as a follower, when the authorized frequency range of the main user is used, corresponding charge is paid to the main user, and thus, a corresponding utility function is set. An optimized game problem with constraint is established by taking the maximal emission power of the user, the threshold of interference temperature and interruption probability constraint into consideration. The optimal emission power of the main user and the cognitive user under the constraint condition can be obtained by solving the optimized game problem in the Lagrange decomposition method and KTT condition, an asynchronous distributed power control algorithm is provided for convergence to Nash equilibrium, and the complexity of the algorithm is greatly reduced. The network throughput is further improved, and the interruption probability of users is reduced.

Description

technical field [0001] The invention relates to a power control technology in a cognitive radio network, in particular to a transmission power control method for multiple primary users and cognitive users. Background technique [0002] In recent years, with the rapid development of IEEE802.11 wireless local area network technology and IEEE802.15 wireless personal area network technology, wireless users are increasing day by day, which leads to the saturation of unlicensed frequency band resources, but the licensed frequency band resources are not very good. use. As the development of wireless communication, cognitive radio provides a new communication technology, and provides a new idea to improve spectrum utilization efficiency and realize efficient resource utilization. [0003] In a cognitive radio network, cognitive users (unlicensed users) can share primary user spectrum resources while causing interference to primary users (licensed users) is lower than its temperatur...

AI Technical Summary

Problems solved by technology

Most of the studies considered multiple carriers and quality-of-service (QoS, quality-of-service) constraints, and the energy-efficient power control game process and result analysis have strong practical value. But these studies did not consider The exchange of information between the primary user and the secondary user and the differences between users. Some studies use the Stackelberg game mechanism for power control in cognitive radio networks. Cognitive users pay the primary user transmission power as a unit to utilize resources. Although the benefit of the primary user is maximized, most studies do not consider the threshold for the interference caused by the cognitive user to be less than the interference temperature

Secondly, most studies only consider optimal power control or maximize system capacity algorithms, without considering the complexity of related algorithms in the model

Finally, so far no researchers have considered the outage probability constraints of cognitive users and primary users into the Stackelberg game power control mechanism

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