CR-system-based method and device for converting frequency spectrums

Abstract

The invention discloses a CR-system-based method and device for converting frequency spectrums. The method comprises the steps that a base station device and a terminal device maintain uplink synchronization on source working frequency points before the frequency spectrums are converted; when restoring a cell on target working frequency points, the base station device judges whether the uplink synchronization is maintained between itself and the terminal device or not, and if yes, the base station device allocates uplink resources for the terminal device on the target working frequency points and sends the uplink resources allocated to the terminal device on the target working frequency points, wherein the uplink resources are used for allowing the terminal device to send a frequency spectrum converting completion message, and the frequency spectrum converting completion message is used for indicating that the terminal device already completes the converting process of the frequency spectrums successfully. According to the embodiment, due to the fact that the process of random access is omitted in the converting process of the frequency spectrums, the conflict over the random access in the converting process of the frequency spectrums of a CR system is avoided, the failure probability of frequency spectrum converting of the CR system is lowered, the service break periods of the CR system are shortened, and the UE 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 based on 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 is inconsistent. Equilibrium phenomenon. [0003] It is against this background that the concept of CR (Cognitive Radio, Cognitive Radio) came into ...

AI Technical Summary

Problems solved by technology

[0007] During the spectrum switching process of the CR system, all terminal devices in the RRC (Radio Resource Control, radio resource control) connection state in the entire cell need to be switched to the target operating frequency point, and there are many terminal devices in the RRC connection state (can be 1200 above), therefore, the use of the existing spectrum switching method will lead to a large number of terminal devices performing a competitive random access process on the target operating frequency point in a short period of time, resulting in a higher random access failure probability and random access delay. As a result, a higher frequency spectrum switching failure probability and a higher service interruption time are caused, which affects the user experience of the CR system

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