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Demand factor based spectrum shared game playing method

A spectrum sharing and spectrum technology, applied in the field of communication, can solve problems such as not being able to achieve fairness in spectrum sharing and not being able to reflect users in real time

Inactive Publication Date: 2011-09-14
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when considering the spectrum requirements of secondary users, the demand degree of each secondary user is regarded as a fixed value, because it cannot reflect the actual needs of users for spectrum in real time, and cannot achieve the goal of fair spectrum sharing.

Method used

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  • Demand factor based spectrum shared game playing method
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  • Demand factor based spectrum shared game playing method

Examples

Experimental program
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Embodiment Construction

[0022] The specific embodiment of the present invention is as follows.

[0023] 1. Establishment of game model

[0024] The participants in the game of the present invention are secondary users, the behavior is to select spectrum, the utility is the income of each secondary user, and the Nash equilibrium is the spectrum allocation when utility is maximum.

[0025] (1) The price and utility function of the main user

[0026] According to the system model described above, the spectrum sharing problem can be modeled as a Cournot game model. N secondary users are game participants, and the strategy adopted is the amount of spectrum required by each secondary user. It is necessary to constantly adjust the bid (the more spectrum is shared, the more expensive the bid is), and secondary users compete with each other to rent the required spectrum to maximize their own interests.

[0027] We assume that the bidding function of the primary user to the secondary user is:

[0028] ...

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Abstract

The invention aims to provide a demand factor based spectrum shared game playing method in a cognitive radio system. In the method, a demand-based secondary user game utility function is constructed aiming at the problem that primary and secondary users share spectrums; the spectrum demand parameter in the function not only relates to a factor that the secondary users have different spectrum demands due to different services, but also relates to the influence of the shared spectrum number on the demands; if more spectrums are shared by the secondary users, the demands on the spectrums are relatively reduced; the demands in the utility function are functions of the shared spectrums and are a variable; and by using the method, the characteristics of the secondary users on the spectrum demands in the cognitive radio system are described more accurately, and the fairness of spectrum distribution can be better reflected.

Description

technical field [0001] The invention relates to an implementation scheme for sharing spectrum between a primary user and a secondary user in a cognitive radio system, and belongs to the technical field of communication. Background technique [0002] With the wide application of wireless communication technology in people's daily life, the problem of scarcity of spectrum resources is becoming more and more serious. Studies have shown that the current fixed spectrum allocation system leads to low average utilization of resources and is extremely unbalanced. The limited available spectrum and low spectrum resource utilization determine the urgent need for a new communication method. The emergence of cognitive radio has created a new situation for solving the shortage of spectrum resources, realizing dynamic spectrum management and improving spectrum utilization. The problem of spectrum sharing in cognitive radio has always been a hot spot in theoretical research at home and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14
Inventor 朱琦周惟风赵夙
Owner NANJING UNIV OF POSTS & TELECOMM
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