CN103002455B - A kind of based on social networks and game theoretic cognitive radio frequency spectrum Share Model - Google Patents
A kind of based on social networks and game theoretic cognitive radio frequency spectrum Share Model Download PDFInfo
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- CN103002455B CN103002455B CN201210385991.0A CN201210385991A CN103002455B CN 103002455 B CN103002455 B CN 103002455B CN 201210385991 A CN201210385991 A CN 201210385991A CN 103002455 B CN103002455 B CN 103002455B
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Abstract
The invention discloses a kind of based on social networks and game theoretic cognitive radio frequency spectrum Share Model, it is characterized in that by social networks, the social relations between authorized user and unauthorized user being modeled, to extract the key parameter (fairness factor, the prestige factor, excitation factor and priority factors) affecting authorized user with unauthorized user frequency spectrum share, feature then in conjunction with frequency spectrum share is formulated based on game theoretic frequency spectrum share scheme, finally determines that each unauthorized user shares the value of frequency band.
Description
Technical field
The invention belongs to cognitive radio technology field, particularly to one based on social networks and game theoretic cognitive radio frequency spectrum Share Model.
Background technology
Frequency spectrum share is effectively to utilize frequency spectrum space to improve the availability of frequency spectrum and to coordinate the key technology that multi-user's frequency band accesses in cognitive radio system.Research worker has been proposed that a variety of cognitive radio frequency spectrum Share Model the most both at home and abroad, inspire such as based on economics auction mechanism, game theoretic, Dynamic Renting based on economics, biology, the frequency spectrum share model etc. of cross-layer optimizing.In frequency spectrum share model based on economics auction mechanism, pricing mechanism is introduced in the frequency spectrum of authorized user and unauthorized user and uses in negotiation, and target is that the income maximizing authorized user avoids the illegitimate competition between unauthorized user simultaneously.Based in economics game theoretic frequency spectrum share model, game theory is used to model and analyze unauthorized user and is shared the frequency band of authorized user by competition and cooperation, reaches the Optimum utilization (Nash equilibrium) of resource.In the frequency spectrum share model of Dynamic Renting, authorized user, according to the request of unauthorized user, suitably heightens jamming margin, to obtain more income.In the frequency spectrum share model that biology inspires, distributing model based on population adaptive task, each unauthorized user selects suitable channel to communicate in a distributed manner.In the frequency spectrum share model of cross-layer optimizing, author considers the conditions such as frequency band heterogeneity, interference constraints and traffic demand, proposes band allocation scheme.These models can allow unauthorized user share the frequency band of authorized user in some sense and authorized user not caused harmful interference.But, they seldom consider the social relations between authorized user and unauthorized user, it is difficult to adapt to personalized frequency spectrum share environment.Actually authorized user and unauthorized user tends to belong to different communities.Under conditions of self not being caused harmful interference, frequency band is more gladly given and is shared with its unauthorized user having more preferable social relations by authorized user.
Social networks is the sociology relation between Probe into Network node and the new branch of science of catenet social property, obtains Preliminary Applications in fields such as wireless self-organization network design, peer-to-peer network streaming media, intrusion detections.Social networks generally exists in actual life, as the user that the whole world is very many is linked together shared information and resource by social network sites Facebook.Certain social relations such as relative, friend, colleague etc. are had between these users.Therefore with social networks, the social relations between authorized user and unauthorized user can be modeled.
In recent years, research worker introduces faith mechanism during cognitive radio collaborative spectrum sensing, to remove data unreliability and the adverse effect of malicious user transmission false data.Social relations between authorized user and unauthorized user also relates to trust problem, but has very big difference with above-mentioned faith mechanism.Trust in social relations refers to authorized user and unauthorized user shares the psychological accreditation of its frequency band, and the more representative of collaborative sensing faith mechanism is the implication of secure data area.
Summary of the invention
It is an object of the invention to combine social networks and features that cognitive radio frequency spectrum is shared, the frequency spectrum share model having been proposed that is overcome to be difficult in adapt to the defect of personalized frequency spectrum share environment, proposing a kind of based on social networks and game theoretic cognitive radio frequency spectrum Share Model, it is suitable for the frequency spectrum share environment of personalization than the frequency spectrum share model having been proposed that.
In order to realize foregoing invention purpose, the technical scheme of employing is as follows:
A kind of based on social networks and game theoretic cognitive radio frequency spectrum Share Model, by social networks, the social relations between authorized user and unauthorized user is modeled, extract key parameter affect authorized user and unauthorized user frequency spectrum share, determine the unauthorized user of shared frequency band then in conjunction with the feature of frequency spectrum share based on game theory.
The method that the present invention uses social networks to model extracts social relations parameter, determines that the unauthorized user part of shared frequency band then combines the feature of frequency spectrum share.Social relations between authorized user and unauthorized user can use following parameter characterization: excitation factor, the prestige factor, priority factors and fairness factor.Excitation factor characterizes knows well degree between unauthorized user and authorized user, and span is.Between unauthorized user and authorized user to know well degree the highest, the value of excitation factor is the biggest.Whether, after the prestige factor characterizes the frequency band that unauthorized user uses authorized user, can exit in time when authorized user to reuse this frequency band, span is.Unauthorized user more can exit the frequency band of authorized user in time, and the value of the prestige factor is the biggest.Priority factors characterizes the priority difference of unauthorized user, and span is.The priority of unauthorized user is the highest, and the value of priority factors is the biggest, and authorized user more wants preferentially to give him by frequency band and shares.Fairness factor is used for balancing the frequency spectrum of unauthorized user and uses chance.After a unauthorized user obtains a frequency spectrum use chance, next time, he was not involved in competing frequency spectrum use chance, fairness factor value is 1, until all unauthorized users all obtain a frequency spectrum and use chance or do not have suitable unauthorized user to select for authorized user, he participates in competition again, and fairness factor value is 0.
According to technique scheme, on the basis of extracting social relations parameter, it is achieved a kind of based on game theoretic frequency spectrum share scheme, step is as follows:
(1) unauthorized user interference to authorized user when the frequency band of shared authorized user the most not cause harmful interference in the sustainable scope of authorized user.This can weigh with the signal interference ratio constraint of primary user's receiving terminal, is defined as
WhereinIt is the transmitting power of authorized user,It isThe transmitting power of individual unauthorized user,It is the channel coefficients between authorized user's transmitter and receiver,It is the channel coefficients between unauthorized user transmitter and authorized user's receiver,It is the variance of noise,It it is jamming margin.
Authorized user obtains the signal interference ratio of corresponding each unauthorized user by controlling channel and checks whether that meeting signal interference ratio retrains.To meeting the unauthorized user that signal interference ratio retrains, by controlling channel transmission beacon message, authorized user informs that it can participate in competing frequency spectrum and use chance, otherwise inform that it does not participate in competing.
(2) multiple unauthorized users share the frequency band of authorized user by the way of game.Frequency band is fixed a price by authorized user, and it depends on social relations parameter.By social relations parameter by importance ranking it is: fairness factor > > the prestige factor > > excitation factor > > priority factors.
After unauthorized user receives the beacon message that can participate in competition, carry out non-cooperative game with the user in same community, to maximize the income of oneself.When game reaches Nash equilibrium, the solution obtained is the frequency band value that each unauthorized user can be shared.
Compared with existing frequency spectrum share model, it is achieved the system structure of the present invention is simple, it is easy to integrated and upgrading, it is suitable for the frequency spectrum share environment of personalization.
Accompanying drawing explanation
Fig. 1 is the frequency spectrum share modular concept figure of social networks modeling；
Fig. 2 is the frequency spectrum share scheme schematic diagram that social relations parameter is relevant with game theory.
Detailed description of the invention
Presently in connection with accompanying drawing 2, the present invention is described further.
The schematic diagram of the present invention as shown in Figure 1, Qi ZhongyouIndividual authorized user, each authorized user has multiple unauthorized user to think shared frequency band, as the 1st authorized user hasIndividual unauthorized user thinks shared frequency band, theIndividual authorized user hasIndividual unauthorized user thinks shared frequency band.Each unauthorized user can share frequency band with one or more authorized user.Each authorized user carries out frequency spectrum price according to the social relations parameter of the unauthorized user thinking shared frequency band, and the unit price that such unauthorized user obtains may be different.The social relations parameter of unauthorized user is compared, to determine each parameter weight in frequency spectrum is fixed a price.Unauthorized user calculates to be shared the gained of frequency spectrum and pays, and then obtains financial value.Signal interference ratio meets the unauthorized user of constraints and participates in non-cooperative game, and when game reaches Nash equilibrium, the solution be given is each unauthorized user.
Claims (1)
1. one kind based on social networks and game theoretic cognitive radio frequency spectrum sharing method, it is characterized in that by social networks, the social relations between authorized user and unauthorized user being modeled, to extract the key parameter affecting authorized user with unauthorized user frequency spectrum share: fairness factor, the prestige factor, excitation factor and priority factors, feature then in conjunction with frequency spectrum share is formulated based on game theoretic frequency spectrum share scheme, finally determines that each unauthorized user shares the value of frequency band；
Described between authorized user and unauthorized user on the basis of social relations, it is achieved as follows based on game theoretic frequency spectrum share protocol step:
(1) interference of authorized user the most not to be caused harmful interference when the frequency band of shared authorized user in the range of authorized user stands by unauthorized user, and retrains with the signal interference ratio of primary user's receiving terminal and weigh, and is defined as
Wherein P is the transmitting power of authorized user, PkBeing the transmitting power of kth unauthorized user, h is the channel coefficients between authorized user's transmitter and receiver, hkIt is the channel coefficients between unauthorized user transmitter and authorized user's receiver, σ2Being the variance of noise, Γ is jamming margin；
Authorized user obtains the signal interference ratio of corresponding each unauthorized user by controlling channel and checks whether that meeting signal interference ratio retrains, to the unauthorized user meeting signal interference ratio constraint, by controlling channel transmission beacon message, authorized user informs that it participates in competition frequency spectrum and uses chance, otherwise inform that it does not participate in competition；
(2) multiple unauthorized users share the frequency band of authorized user by the way of game, and each unauthorized user asks a certain amount of frequency band, and frequency band is fixed a price by authorized user, and it depends on social relations parameter；By social relations parameter by importance ranking it is: fairness factor is more than priority factors more than the prestige factor more than excitation factor；After unauthorized user receives the beacon message participating in competition, participating in non-cooperative game, it is therefore an objective to maximize the income of oneself, when game reaches Nash equilibrium, the solution of gained is the frequency band value that each unauthorized user is shared.
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| WO2016000634A1 (en) * | 2014-07-03 | 2016-01-07 | U3D Limited | Matter sharing method |
| TWI600331B (en) * | 2015-04-08 | 2017-09-21 | 財團法人資訊工業策進會 | Base station, user equipment, transmission control method for base station and data transmission method |
| CN104993890B (en) * | 2015-07-14 | 2018-04-13 | 福建师范大学 | Security cooperation frequency spectrum sensing method based on credit mechanism and dynamic game |
| CN108235327B (en) * | 2017-12-28 | 2021-06-29 | 桂林电子科技大学 | Cognitive wireless network spectrum resource optimal allocation method based on non-cooperative game theory |
| CN110267274B (en) * | 2019-05-09 | 2022-12-16 | 广东工业大学 | Spectrum sharing method for selecting sensing users according to social credibility among users |
| CN110225525B (en) * | 2019-06-06 | 2022-06-24 | 广东工业大学 | Cognitive radio network-based spectrum sharing method, device and equipment |
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| CN102186174A (en) * | 2011-04-22 | 2011-09-14 | 南京邮电大学 | Cooperative spectrum sharing game method for cognitive radio system |
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| CN102186174A (en) * | 2011-04-22 | 2011-09-14 | 南京邮电大学 | Cooperative spectrum sharing game method for cognitive radio system |
| CN102316465A (en) * | 2011-09-23 | 2012-01-11 | 北京邮电大学 | Frequency spectrum gaming distribution method in cognitive wireless network |
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