Distribution method of united power and channels in cognitive wireless network

Abstract

The invention discloses a distribution method of united power and channels in a cognitive wireless network. The distribution method of the united power and the channels in the cognitive wireless network comprises the steps that (1) interference between a primary user and a cognitive user on each channel in the multi-channel cognitive wireless network and among cognitive users is quantized and limited; (2) a utility function defining the behavior that each cognitive user is accessed to a frequency spectrum serves as a handling capacity, and the optimal solution of the utility function of the cognitive users is solved in a distributed mode by constructing a non-cooperative game frame so that the performance of the entire network can be optimal; (3) a corresponding price function is introduced to price resource occupation behaviors of the cognitive users, and selfishness of the cognitive users is limited; (4) a potential game model is built by utilizing a non-cooperative game, and astringency of the potential game model is guaranteed. The distribution method of the united power and the channels in the cognitive wireless network has the advantages of solving the problem of distribution of the united power and the channels in a distributed mode by utilizing the price function and the potential game model, and improving distribution fairness of network resources and the utilization efficiency of the frequency spectrum.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a joint power and channel allocation method in a cognitive radio system. Background technique [0002] Cognitive Radio (CR: Cognitive Radio) is a new technology to improve the utilization of spectrum resources. As an intelligent communication system that can perceive the external communication environment, it allows multi-dimensional spectrum multiplexing and sharing in the time domain, frequency domain and air domain. The core idea of ​​CR is: by adjusting network working parameters, under the premise of quantifying and limiting interference to primary users (PUs: Primary Users), allowing secondary users (SU: Secondary User) based on cognitive radio functions, also known as authentication Known users, collectively referred to as cognitive users (CR) in this paper, opportunistically access licensed frequency bands dynamically, so as to improve spectrum...

AI Technical Summary

Problems solved by technology

The above researchers usually consider the iterative solution of unary information (power or channel) by using the non-cooperative game model. The disadvantage is that there is no joint power control and channel selection.

[0026] The shortcomings of the above methods are: first, the joint allocation of distributed control power and channels is not really realized; second, the mutual interference between cognitive users is not fully considered

However, in order to achieve distributed joint power and channel allocation, a large amount of information needs to be exchanged between each cognitive user, which increases the complexity of each cognitive user and is also a technical problem in implementation.

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