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Cognitive radio network power distribution method with multichannel cooperative communication

A cognitive wireless network and cooperative communication technology, applied in the field of cognitive wireless network power allocation of multi-channel cooperative communication, can solve the problem of not considering the total power constraint of the same cooperative relay terminal, not considering the selfish behavior of users, and not considering the secondary user. Issues such as multiple channel power allocation criteria

Inactive Publication Date: 2017-01-25
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The shortcomings of the above methods are: first, although the overall capacity of the cognitive radio network is considered from an overall perspective, the selfish behavior of the user is not considered; Power allocation criterion; Third, the total power constraint when the same cooperative relay terminal provides relay services for multiple secondary users is not considered

Method used

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  • Cognitive radio network power distribution method with multichannel cooperative communication
  • Cognitive radio network power distribution method with multichannel cooperative communication
  • Cognitive radio network power distribution method with multichannel cooperative communication

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Experimental program
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Embodiment 1

[0063] Such as figure 1 As shown, this embodiment provides a cognitive wireless network power allocation method for multi-channel coordinated communication. The cognitive wireless network includes at least a first primary user originating end, a first primary user receiving end, a second primary user originating end, The second main user receiving end, the first user sending end, the first user receiving end, the second user sending end, the second user receiving end, the relay device sending end, the relay device receiving end, the first channel and the second user receiving end channel, which divides the transmission time into two slots:

[0064] In the first time slot, the first primary user transmitting end and the first primary user receiving end transmit data through a first channel, and the second primary user transmitting end and the second primary user receiving end transmit data through a second channel; the The first user sending end and the first user receiving en...

Embodiment 2

[0105] The cognitive wireless network power allocation method provided in this embodiment considers a cognitive wireless network based on padding spectrum sharing, which includes at least two secondary users (transmitting and receiving pairs) and a half-duplex relay device. Two channels are used by secondary users, and if secondary user transmissions do not interfere with primary user transmissions, they can access both channels. It is assumed that each channel is occupied by a primary user, and both the secondary user and the relay device have the ability to transmit and receive on multiple channels at the same time. Record the two secondary users as SU1 and SU2 respectively, record the two channels as channel I and channel II respectively, and the primary users occupying channel I and channel II as PU1 and PU2 respectively. Without loss of generality, it is assumed that both channels are of unit bandwidth. The total transmission power owned by SU1 and SU2 is limited to P1 a...

Embodiment 3

[0160] In the cognitive wireless network power allocation method provided in this embodiment, its network structure and transmission mechanism are as follows: figure 1 shown. In order to analyze the selfish behavior of two secondary users, it is modeled as a non-cooperative game. First examine the capacity of the transport mechanism. Consider SU1 first, remember SU i Send to SU j The channel gain at the receiving end is h ij , SU i The channel gain from the sending end to the receiving end of the relay device is h ir , the relay device sends to the SU i The channel gain at the receiving end is h ri , SU i Send to PU j The channel gain at the receiving end is h ipj , the relay device sends to the PU j The channel gain at the receiving end is h rpj. The total capacity consists of three parts: the direct transmission capacity of the first time slot, the direct transmission capacity of the second time slot, and the relay transmission capacity. The half-duplex relay...

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Abstract

The invention discloses a cognitive radio network power distribution method with multichannel cooperative communication. A cognitive radio network is at least formed by two master user transmit-receive ends, two secondary user transmit-receive ends, one relay transmit-receive end and two channels based on an underlay spectrum sharing mode. Secondary users and master users can transmit respective data in the same channel at the same time, and the secondary users can transmit data with the cooperation of a relay device. Strict power control is required to be implemented when the secondary users transmit the data, so that the interference caused on the communication of the master users is ensured to be no more than interference limitation. The method aims to enable the two secondary users to reasonably distribute power on the two channels so as to maximize respective transmission capacity, and ensures that the interference on the two master users is lower than the limitation at the same time. A power distribution problem is modeled as a non-cooperative game, which is proved to meet the supermodel characteristic, so that balance exists. According to a favorable convergence property of a supermodel game, a best response updating algorithm is provided for reaching a break-even point, so that reasonable power distribution is realized.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a cognitive wireless network power allocation method for multi-channel cooperative communication. 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 environment, it allows multi-dimensional resource sharing in the time domain, frequency domain and air domain. In a cognitive radio network, there are two types of users: one is spectrum licensed users, ie, primary users (PU: Primary User), and the other is spectrum unlicensed users, ie, secondary users (SU: Secondary User). There are three ways to share cognitive radio resources: the first is overlay spectrum sharing: the secondary user obtains available channel information through spectrum sensing, and waits for an opportunity to access the idle channel communic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W72/04
CPCH04W16/14H04W72/0473
Inventor 冯文江姜文浩孔乾坤刘国岭张博为应腾达
Owner CHONGQING UNIV
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