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Distance ratio based D2D (dimension to dimension) link spectrum allocation method

A spectrum allocation and distance ratio technology, applied in electrical components, wireless communication, network planning, etc., to achieve the effect of simplifying formulas and simple implementation methods

Inactive Publication Date: 2012-12-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, a major problem in the D2D system in the cellular network is how to perform interference coordination to avoid harmful interference to the cellular network, to improve the capacity of the D2D system, or to ensure reliable D2D communication

Method used

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  • Distance ratio based D2D (dimension to dimension) link spectrum allocation method
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  • Distance ratio based D2D (dimension to dimension) link spectrum allocation method

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Embodiment

[0046] Such as figure 1 In the cell model shown, there are multiple base station users and multiple pairs of D2D links in the cell. We introduce the D2D communication link into a cell. After all users report their positions to the base station, due to the unbalanced communication load of the uplink and downlink, no matter whether the D2D link uses the user's spectrum or divides the spectrum separately, we consider The D2D link uses the cell uplink for communication.

[0047] Such as figure 2 As shown, the D2D link will not cause interference to the received signal of the base station user, but will cause interference to the received signal of the base station. The transmission power of the D2D link can be limited to solve the interference to the base station user.

[0048]Firstly, spectrum resources of shared base station users are selected. When selecting shared base station user spectrum resources, attention should be paid: you cannot choose the spectrum of base station ...

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Abstract

The invention discloses a distance ratio based D2D (dimension to dimension) link spectrum allocation method, belonging to the technical field of wireless communication. The method disclosed by the invention is implemented through selecting a D2D link which carries out communication by using a cell uplink in a cell, firstly selecting a base station user according with distance-ratio conditions in the cell, and sharing the spectrum resources of the base station user with the D2D link; and if the spectrum can not be shared, separately allocating a spectrum to the D2D link. Through the method, the interference problem in a D2D system is solved, thereby obtaining the capacity enhancement and ensuring the reliable D2D communication; and meanwhile, the spectrum selection criteria of D2D links is greatly simplified, thereby helping a base station to rapidly complete the spectrum allocation of D2D links.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method for allocating frequency spectrum of a D2D link based on a distance ratio. Background technique [0002] D2D communication is a new technology that allows terminals to communicate directly by reusing cell resources under the control of a system. It has many advantages: it can increase the spectral efficiency of the cellular communication system, increase the instantaneous rate, and reduce the terminal transmit power. To a certain extent, it solves the problem of lack of spectrum resources in wireless communication systems. D2D reuses cell spectrum resources, transmits data between each other through a link, and the base station can control resource allocation between base station users and D2D users. [0003] However, a major problem in the D2D system of the cellular network is how to perform interference coordination to avoid harmful interfer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10
Inventor 冉小刚田高辉王文远张忠培
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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