A Power and Spectrum Allocation Method Based on Bit Error Rate in Cooperative Cognitive Network

Abstract

The invention discloses an error rate based power and frequency spectrum allocation method in a cooperative cognition network. A main user source node and a main user target node communicate with each other on an authorized frequency band B. A cooperative relay node in a slave user system assists the main user source node to forward data to the main user target node so as to obtain a chance for the slave user system to access the authorized frequency band for data transmission. A main user authorization frequency spectrum is divided into two parts of Alpha (0<Alpha<1) and 1-Alpha. In the frequency spectrum of the Alpha part, the cooperative relay node assists the main user source node in a forwarding amplification manner to forward data to the main user target node. In the frequency spectrum of the 1-Alpha part, the slave user source node sends data of itself. Communication requirements of the main user system are ensured, and power allocation and authorization frequency spectrum allocation are performed by taking the minimization of user error rate as the target. According to the invention, under the premise of ensuring the communication quality of the main user system, the probability of access of the authorization frequency spectrum of the main user system by a slave user can be increased effectively and frequency spectrum utilization rate can be improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a power and frequency spectrum allocation method based on a bit error rate in a collaborative cognitive network. Background technique [0002] With the rapid development of information technology, various wireless services have sprung up like mushrooms, making the originally precious radio spectrum resources increasingly tense. The serious problem of how to meet the increasing demand for radio spectrum has attracted widespread attention. Studies have shown that the wireless spectrum used by humans at any time only accounts for 2% to 6% of all spectrum resources. At the same time, the investigation by the Federal Communications Commission (FCC) of the United States also shows that the usage of wireless spectrum resources in the world is extremely unbalanced, and some licensed spectrums are often idle. [0003] The main reason for the shortage of spectrum resources...

AI Technical Summary

Problems solved by technology

[0005] In the wireless communication environment, factors such as fading, multipath effects, and shadow effects affect the normal operation of the communication system, and the current wireless communication business is increasing day by day, and the existing spectrum resource allocation scheme will cause the problem of spectrum scarcity

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