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Cell search method and device, storage medium, terminal

A cell search and cell technology, applied in the field of communications, 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: 2022-06-24
RDA MICROELECTRONICS SHANGHAICO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment Construction

[0026] As mentioned in the background art, the prior art solution adopts the power detection method to perform frequency scanning. Under the condition of low signal-to-noise ratio, the frequency scanning time is long, the effect is poor, and it is difficult to camp on a suitable cell.

[0027] Wireless communication systems may be deployed on different carriers (eg, carriers with different center frequencies) due to granted spectrum licenses or network optimization. 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 can be large (up to hundreds), the entire search can take a long time.

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

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Abstract

A cell search method and device, a storage medium, and a terminal. The cell search method includes: determining a current carrier, the current carrier being selected from a frequency point list; at least performing coherent detection on the current carrier to obtain the current carrier The coherent detection result of the current carrier; when the coherent detection result of the current carrier meets the preset search condition, perform cell search and camp on the current carrier. Through the technical solution provided by the present invention, even in a scene with a low signal-to-noise ratio, a good frequency scanning effect can be obtained, and it 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 licensed spectrum licenses or network optimization reasons, wireless communication systems are usually deployed in different carriers (ie, center frequencies). When a user equipment (User Equipment, UE for short) is powered on or enters a new area, the UE may not know in which carrier the operator is deployed. To determine the carrier, the most direct method is to traverse all possible carriers for cell search. However, since the number of carriers can be large (eg, up to hundreds), it takes a lot of time to complete the search. The UE therefore typically performs a frequency scanning operation to determine which carrier or carriers on which to perform the cell search. [0003] In the prior art, the frequency scanning process is as follows: first, in a s...

Claims

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Application Information

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