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Sharing spectrum access-based carrier and power combined allocation method

A technology of shared spectrum and joint allocation, applied in the field of shared spectrum access, to achieve stable power allocation results and fast convergence speed

Inactive Publication Date: 2012-02-29
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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AI Technical Summary

Problems solved by technology

The present invention completely solves the problem of carrier and power allocation in the padding mode and underlay mode when the shared spectrum is accessed, improves the utilization rate of spectrum resources, and provides a new idea for spectrum allocation in cognitive radio

Method used

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  • Sharing spectrum access-based carrier and power combined allocation method
  • Sharing spectrum access-based carrier and power combined allocation method
  • Sharing spectrum access-based carrier and power combined allocation method

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Embodiment Construction

[0024] Below, the present invention will be further described in conjunction with the accompanying drawings.

[0025] The carrier and power joint allocation method based on shared spectrum access, through the carrier state information obtained by spectrum sensing and channel estimation, according to the different access modes, select the appropriate carrier to allocate among the cognitive users, which is characterized in that it includes the following steps :

[0026] (1) To establish a cognitive wireless network, the number of cognitive users and authorized user channels are N and M respectively, and the interference tolerance of authorized users on each channel is I k , initialize the interference tolerance factor η k (0)=0, where k is the kth channel of the authorized user, and k=1, 2, . . . , M.

[0027] (2) Determine the network access mode. If the cognitive user is allowed to access the authorized channel in the working state, it is the underlayment type spectrum acces...

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Abstract

The invention discloses a sharing spectrum access-based carrier and power combined allocation method. By the method, the problem of spectrum allocation in cognitive radio is solved by combining a game correlation theory, a duality principle, a subgradient method and the like; when an overlay spectrum accesses, an iterative algorithm for power allocation is provided, the convergence and the availability of the iterative algorithm are verified, and the problem of carrier and power allocation is solved when an underlay spectrum accesses; and when the underlay spectrum accesses, due to the constraint of the interference tolerance, strategy spaces among users are mutually coupled, and a coupling strategy game is decomposed into an independent strategy non-cooperative game and an optimization problem by introducing the duality principle and the subgradient method, so that the problem of carrier and power allocation is solved when the underlay spectrum accesses.

Description

technical field [0001] The invention relates to a power water injection algorithm, a carrier allocation method and a power iterative algorithm in a cognitive radio system, and is especially suitable for shared spectrum access when authorized users exist or have interference tolerance constraints, and the purpose is to reasonably allocate the power and power of cognitive users. Authorize the user's spectrum to improve the utilization of spectrum resources. Background technique [0002] With the emergence of the third-generation mobile communication system and high-speed data network, especially the support for multimedia data services, advanced spectrum utilization technology and spectrum allocation algorithm play a vital role in improving system performance. Cognitive radio technology has gradually become a research hotspot in the industry and various spectrum management agencies because it can make full use of the idle spectrum of licensed users. The spectrum allocation st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04W16/14H04W72/04
Inventor 刘玉涛徐聪孙腾孙志国
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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