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Spectrum switching method and equipment in cognitive radio (CR) system

A cognitive radio and spectrum switching technology, applied in wireless communications, electrical components, etc., can solve problems such as random access conflicts, reduce service interruption time, improve user experience, and reduce random access failure probability and delay. Effect

Inactive Publication Date: 2012-08-01
CHINA ACAD OF TELECOMM TECH
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Problems solved by technology

[0015] Embodiments of the present invention provide a spectrum switching method and equipment in a cognitive radio system to solve the problem that the spectrum switching process of the existing CR system may cause random access conflicts

Method used

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  • Spectrum switching method and equipment in cognitive radio (CR) system
  • Spectrum switching method and equipment in cognitive radio (CR) system
  • Spectrum switching method and equipment in cognitive radio (CR) system

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Embodiment Construction

[0044] As mentioned in the background technology, the use of the existing spectrum switching method will cause a large number of terminals to perform the contention random access process on the target operating frequency point in a short period of time, thus resulting in a higher random access failure probability and random access Incoming delay, which in turn leads to a higher frequency spectrum switching failure probability and a higher CR system UE service interruption time, affecting the user experience of the CR system. .

[0045] In order to overcome such defects, the technical solution proposed by the embodiment of the present invention proposes a spectrum switching method in a cognitive radio system based on a non-competitive random access process. The main technical idea is: in a cognitive radio system, The base station specifies the dedicated random access resource on the target operating frequency point that the terminal needs to apply during the spectrum switching ...

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Abstract

The invention discloses a spectrum switching method and equipment in a cognitive radio (CR) system. By adopting the technical scheme provided by the embodiment of the invention, in a CR system, a base station designates the dedicated random access resources on a target working frequency point required by a terminal in the spectrum switching process through a spectrum switching command; and the terminal executes a non-competitive random access process on the target working frequency point based on the dedicated random access resources, finishes uplink synchronization of the target working frequency point, and sends a spectrum switching completion message to the base station of the CR system. Since the dedicated random access resources among different terminals do not conflict, in the spectrum switching process, the terminal executes a non-competitive random access process on the target working frequency point by use of the dedicated random access resources after finding the target working frequency point, and the random access failure probability and delay on the target working frequency point can be reduced, thus the spectrum switching failure probability and the UE (user equipment) service interruption time are reduced, and the user experience of the CR system is improved.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a spectrum switching method and equipment in a cognitive radio system. Background technique [0002] Radio communication spectrum is a precious natural resource. With the rapid development of wireless communication technology, the problem of poor spectrum resources is becoming more and more serious. In order to alleviate the shortage of spectrum resources, relevant departments and institutions have carried out monitoring and research on wireless communication spectrum , it is found that some frequency bands (such as TV frequency bands) are not used most of the time or in most regions, while some frequency bands have multi-system and multi-user competition at the same time, that is, the use of spectrum resources exists unbalanced phenomenon. [0003] It is against this background that the concept of Cognitive Radio (CR) came into being. The basic idea is: on the ...

Claims

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Application Information

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IPC IPC(8): H04W36/06H04W74/08
Inventor 白文岭李媛媛蒋成钢杨宇
Owner CHINA ACAD OF TELECOMM TECH
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