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Interference measurement and interference avoidance method based on cognitive radio technology

A technology of cognitive radio and interference measurement, applied in the fields of interference measurement and interference avoidance

Inactive Publication Date: 2012-07-04
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cognitive radio technology can help cognitive users intelligently choose the best and cheapest service for wireless transmission, but it inevitably brings interference from cognitive users to authorized users. Therefore, we need to pay more attention to Focus on research on cognitive radio technology based on interference suppression

Method used

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  • Interference measurement and interference avoidance method based on cognitive radio technology
  • Interference measurement and interference avoidance method based on cognitive radio technology
  • Interference measurement and interference avoidance method based on cognitive radio technology

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no. 1 example

[0037] image 3 It is a flow chart of the interference measurement and interference avoidance method based on the cognitive radio technology in the first embodiment of the present invention, combined with the following image 3 Each step of this embodiment will be described in detail.

[0038] In step S310, the cognitive user terminal (also referred to as a cognitive user or a cognitive user transceiver) acquires its own working parameters and the authorized user mobile terminals in the network at the location of the cognitive user (hereinafter referred to as authorized users) Working parameters. Authorized user mobile terminals generally include authorized user receivers and transmitters for two-way communication.

[0039] Specifically, in order to determine the interference range of cognitive user activities, cognitive users need to obtain relevant parameters, and because the cognitive user network is transparent to the authorized user network, there is no communication betw...

no. 2 Embodiment

[0059] Considering that the licensed user system is an LTE system and the cognitive user is a mobile station of the LTE FDD standard, the cognitive user has the opportunity to use the spectrum not used by the licensed user, and implements interference measurement and interference avoidance strategies for real-time scenarios before adopting a spectrum access strategy.

[0060] According to the cognitive interference ring model and the perception threshold setting criterion proposed in the present invention, the implementation process of the interference measurement and interference avoidance mechanism based on cognitive radio technology is as follows:

[0061] A detection cycle starts at a certain moment, and cognitive users obtain relevant parameters by querying historical values ​​in the database or performing real-time field measurements of wireless channels. The typical value of the transmit power of the base station of the LTE FDD system is 20dBm, which is distributed on th...

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Abstract

The invention discloses an interference measurement and interference avoidance method based on a cognitive radio technology. The method comprises a parameter determining step, an interference distance determining step and a detection step, wherein in the parameter determining step, a cognitive user terminal determines own working parameters and acquires the working parameters of authorized users in a network at the position of the cognitive user terminal; in the interference distance determining step, the interference distance of the cognitive user terminal is calculated on the basis of the acquired working parameters, wherein the interference distance is the distance that an authorized user receiver in a circular area cannot normally communicate, the cognitive user terminal is set as the center of the circular area, and the interference distance is set as the radius of the circular area; and in the detection step, the cognitive user terminal detects whether an authorized user transmitter exists in an expanded interference range, if a detection result indicates that the authorized user transmitter exists, the authorized user receiver in a cognitive interference range exists, and the parameter determining step is performed. The method can be used for assisting in accurately judging an interference scene to ensure that the communication service quality of the authorized users cannot be interfered after a cognitive user network is introduced.

Description

technical field [0001] The invention relates to the fields of wireless communication and mobile communication, in particular to interference measurement and interference avoidance based on cognitive radio technology. Background technique [0002] Nowadays, with the increasing demand for wireless communication and the continuous development of wireless communication technology, the requirements for the data transmission rate supported by wireless communication technology are also getting higher and higher, which leads to a corresponding increase in the demand for wireless spectrum resources, making the applicable Spectrum resources for wireless communications are becoming increasingly tight, becoming a new bottleneck restricting the development of wireless communications. However, actual measurements by relevant organizations have found that the allocated wireless system spectrum resources are idle to a large extent in time and space, which is what we call "spectrum holes". ...

Claims

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Application Information

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IPC IPC(8): H04W16/14H04W24/08H04B17/00H04B17/345
Inventor 许晓东张平汪赛徐舟张慧鑫陶小峰崔琪楣王强尹越
Owner BEIJING UNIV OF POSTS & TELECOMM
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