A Cooperative Spectrum Sharing Method Based on Contract-Based Joint Optimization of Bandwidth and Power

Abstract

The invention relates to a contract-based bandwidth and power combined optimization cooperative spectrum sharing method. In the method, an authorized user and a cognitive user perform cooperation according to a contract; the cognitive user capable of correcting decoding a signal of the authorized user designs the type of the cognitive user itself according to the conditions, such as a channel, the power, the power consumption cost and the rate of the cognitive user itself, and tells the authorized user of the type; the authorized user designs a corresponding contract for the cognitive user according to the type provided by the cognitive user; and the cognitive user performs communication according to the contract provided by the authorized user, sends the self signal to a receiving end of the cognitive user by using a part of bandwidth in the second time slot, and then, assists to forward the signal of the authorized user to a receiving end of the authorized user by utilizing the rest bandwidth. By means of the contract-based bandwidth and power combined optimization cooperative spectrum sharing method disclosed by the invention, the problem that the resource distribution calculation complexity in the game theory method is high can be effectively solved; the possible cheating phenomenon of the cognitive user can be effectively avoided; and the user utility is improved easily.

Description

technical field [0001] The invention belongs to the technical field of cognitive radio network communication in the field of wireless communication, in particular to a collaborative spectrum sharing strategy. Background technique [0002] With the rapid growth of wireless services and the demand for wireless applications to transmit data, limited spectrum resources are becoming increasingly scarce. Traditional static spectrum management methods and spectrum allocation strategies make the utilization ratios of different bandwidths very different. Spectrum measurement data shows that part of the licensed spectrum is often idle. Under traditional mechanisms, specific bandwidth is allocated to specific systems; even when that bandwidth is not being used, unauthorized users are prohibited from using it. Cognitive radio is regarded as an effective technology to improve spectrum utilization. Cognitive users can access wireless spectrum opportunistically through spectrum sensing,...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the high computational complexity of resource allocation and the possible deception of cognitive users in the existing cooperative spectrum sharing method based on game theory, solve the problems of high computational complexity and unreasonable assumptions in resource allocation

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