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Cell search method and device, storage medium and terminal

A cell search and cell technology, applied in the field of communication, can solve the problems of inability to determine the carrier carrier, not a useful signal, signal noise flooding, etc., and achieve the effect of speeding up the frequency scanning process, reducing the time used, and saving power consumption

Active Publication Date: 2020-06-16
RDA MICROELECTRONICS SHANGHAICO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, even if the power is large, it may come from an interference signal, not a useful signal
On the other hand, in a low SNR environment (for example, when the SNR is below -10dB), the useful signal may be overwhelmed by the noise
That is, the power-based cell search method may not be able to determine the carrier deployed by the operator

Method used

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  • Cell search method and device, storage medium and terminal
  • Cell search method and device, storage medium and terminal
  • Cell search method and device, storage medium and terminal

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Embodiment Construction

[0026] As mentioned in the background art, the existing technical solution uses a power detection method for frequency scanning. Under the condition of low signal-to-noise ratio, the frequency scanning takes a long time, the effect is poor, and it is difficult to reside in a suitable cell.

[0027] Due to granted spectrum licenses or network optimization, wireless communication systems may be deployed on different carriers (eg, carriers with different center frequencies). When a user equipment (User Equipment, UE for short) is powered on or enters a new area, the UE may not know which carrier its operator is deployed on.

[0028] One of the most direct methods is that the UE performs cell search on all possible carriers one by one. However, since the number of carriers may be large (up to hundreds), the entire search may take a long time.

[0029] To this end, the UE generally performs a frequency scanning operation to perform a cell search after determining a carrier or carr...

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Abstract

The invention discloses a cell search method and device, a storage medium and a terminal, and the method comprises the steps: determining a current carrier which is selected from a frequency point list; at least performing coherent detection on the current carrier to obtain a coherent detection result of the current carrier; and when the coherent detection result of the current carrier meets a preset search condition, carrying out cell search residence on the current carrier. Through the technical scheme provided by the invention, a good frequency scanning effect can be obtained even in a lowsignal-to-noise ratio scene, and the method is easy to reside in a cell with better channel quality.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a cell search method and device, a storage medium, and a terminal. Background technique [0002] Due to authorized spectrum licenses or network optimization reasons, wireless communication systems are usually deployed on different carriers (ie, central frequency points). When a user equipment (User Equipment, UE for short) is turned on or enters a new area, the UE may not know which carrier is deployed by the operator. To determine the carrier, the most direct method is to traverse all possible carriers for cell search. However, since the number of carriers may be large (eg, up to hundreds), it takes a lot of time to complete the search. Therefore, the UE usually performs a frequency scanning (frequency scanning) operation to determine which carrier or carriers to perform cell search on. [0003] In the prior art, the frequency scanning process is as follo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/16H04J11/00
CPCH04W48/16H04J11/0069
Inventor 杨殷张凯王琤
Owner RDA MICROELECTRONICS SHANGHAICO LTD