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Cognitive wireless network frequency spectrum access method based on group evolution theory

A cognitive wireless network and spectrum access technology, which is applied in the field of spectrum access based on the theory of group evolution, can solve problems such as limiting the probability of conflict between cognitive users and primary users, and achieve the effect of improving utilization and maximizing utility

Inactive Publication Date: 2012-04-11
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] At present, research on dynamic spectrum access mainly focuses on opportunistic spectrum access. Many domestic and foreign scholars have conducted research on the realization of effective spectrum opportunity sharing through game theory, auction theory, and mathematical programming theory. Conflict Probability of Primary User

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  • Cognitive wireless network frequency spectrum access method based on group evolution theory
  • Cognitive wireless network frequency spectrum access method based on group evolution theory
  • Cognitive wireless network frequency spectrum access method based on group evolution theory

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Embodiment Construction

[0032] Below in conjunction with accompanying drawing, the technical scheme of the present invention is described in further detail:

[0033] A cognitive wireless network spectrum access method based on population evolution theory, including the following processes:

[0034] (1) Build a model

[0035] The present invention models the spectrum utilization problem through dynamic population evolution. Assuming that there are multiple networks that can be accessed by cognitive users in a certain geographical area, each network service provider sells spectrum through a pricing function, and the higher the cognitive user's demand for spectrum, the higher the spectrum price. Increase the rewards for spectrum sharing with cognitive wireless networks. The pricing function is defined as follows:

[0036] (1)

[0037] in are non-negative constants, and (so that this pricing function is convex), A collection of policies representing all users , The...

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Abstract

The invention discloses a cognitive wireless network frequency spectrum access method based on a group evolution theory. The method comprises the following steps that: (1) different authorized network service providers sale idle frequency spectrums with different prices to the cognitive wireless network; (2) a cognitive user notifies remuneration obtained by the cognitive user to a network frequency spectrum manager; (3) the network frequency spectrum manager adjusts a quantity of the cognitive users accessed to a main network according to a method based on the group evolution theory. When the quantity of the cognitive users reaches a stable state, effectiveness of the cognitive users and the network can be maximized. In the method, the group evolution theory is used to solve a dynamic access problem of the frequency spectrum in the cognitive wireless network so that all the cognitive users gradually acquire the same remuneration through an opportunity of accessing to different network frequency spectrums. Therefore, the evolution is equalized and a utilization efficiency of the frequency spectrums can be increased.

Description

[0001] technical field [0002] The invention relates to a spectrum access method in a cognitive wireless network, in particular to a spectrum access method based on the theory of group evolution. [0003] Background technique [0004] A large number of research reports show that the worldwide utilization of spectrum resources is extremely unbalanced, coupled with the rapid growth of demand for wireless communication services, wireless spectrum resources are increasingly scarce. Therefore, for wireless networks, it is particularly necessary to conduct research on spectrum allocation mechanisms to improve the utilization efficiency of wireless spectrum resources. [0005] At present, the research on dynamic spectrum access mainly focuses on opportunistic spectrum access. Many scholars at home and abroad have conducted research on the realization of effective spectrum opportunity sharing through game theory, auction theory and mathematical programming theory. The collision p...

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Application Information

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IPC IPC(8): H04W16/10H04W16/14
Inventor 孙雁飞亓晋张斐李琳
Owner NANJING UNIV OF POSTS & TELECOMM
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