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A cell selection method and terminal

A cell selection and cell technology, applied in the field of communications, can solve problems such as time extension and high power consumption, and achieve the effect of improving efficiency and reducing power consumption of terminals

Active Publication Date: 2021-03-02
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a cell selection method and a terminal to solve the problem in the prior art that when the terminal performs cell search and selection, the power consumption is large and the duration is prolonged

Method used

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  • A cell selection method and terminal
  • A cell selection method and terminal
  • A cell selection method and terminal

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0039] Step 12 may include: ignoring the second frequency point if it is detected that the second frequency point indicated by the access assistance information is a scanned historical frequency point.

[0040] Assume that the terminal scans the frequency point f1 and finds that the cell on the frequency point f1 cannot be camped on or accessed, that is, it is not a suitable cell. The terminal further scans the frequency point f2 and finds that the cell on the frequency point f2 cannot be camped on or accessed, but the SSB detected on the frequency point f2 indicates that the sync raster (frequency point) to be scanned is f1; f1 is the historical frequency point that has been scanned. In order to prevent the terminal from repeatedly scanning the scanned frequency point, the terminal can ignore the syncraster obtained on the SSB of frequency point f2 and continue to scan other unscanned frequency points.

example 2

[0042] Step 12 may include: if it is detected that the second frequency point indicated by the access assistance information is a historical frequency point that has been scanned, then detecting the first time interval between the current moment and the last scanning moment of the second frequency point; If the first time interval is greater than the first preset interval threshold, the second frequency point is scanned; if the first time interval is smaller than the first preset interval threshold, the second frequency point is ignored. Wherein, when the first time interval is equal to the first preset interval threshold, the second frequency point may be scanned, or the second frequency point may be ignored.

[0043] Assume that the terminal scans the frequency point f1 and finds that the cell on the frequency point f1 cannot be camped on or accessed, that is, it is not a suitable cell. The terminal further scans the frequency point f2 and finds that the cell on the frequenc...

example 3

[0051] Detecting whether the target cell on the second frequency point indicated by the access assistance information is a historical cell that has been scanned, and ignoring the target cell if the target cell is a historical cell.

[0052] Assume that the terminal scans the frequency point f1 and finds that the cell with the strongest signal on the frequency point f1 (such as a cell with a PCI of X) cannot reside or access, that is, it is not a suitable cell; the terminal continues to scan the frequency point f2 and finds that the cell on the frequency point f2 The cell with the strongest signal cannot be camped on or accessed, but the SSB of this cell indicates that the sync raster (frequency point) to be scanned is f1, and the target cell is a cell whose PCI is X. Since the frequency point f1 is the scanned historical frequency point, and the target cell is consistent with the scanned historical cell (the cell whose PCI is X) on the frequency point f1, in order to prevent th...

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Abstract

The invention discloses a cell selection method and a terminal. The method includes: acquiring access assistance information carried in a synchronization signal block on a first frequency point; wherein, the access assistance information includes indicating the next second frequency to be scanned. point indication information; determine whether to scan the second frequency point according to the access assistance information and frequency point scanning history information. The terminal of the present invention preferentially scans the access assistance information to determine the next second frequency point to be scanned, because the second frequency point indicated by the access assistance information is recommended by the network device and has a high probability of being suitable for accessing the cell. Therefore, the efficiency of the terminal in selecting a cell can be improved, and the power consumption of the terminal can be reduced. In addition, the terminal also determines whether to scan the second frequency point based on the historical information of the frequency point, which can avoid the terminal repeatedly scanning the scanned frequency points and cells, and further reduce the time delay and consumption in the terminal search, cell selection, and reselection processes. Electricity.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a cell selection method and a terminal. Background technique [0002] In the fifth generation (5 th Generation, 5G) communication system, or New Radio (NR) system, network devices need to send Synchronized Signal Blocks (Synchronized Signal Block, SSB) for terminals to perform synchronization, system information acquisition, measurement and evaluation, etc. Wherein, one SSB is composed of two parts: a New Radio Synchronized Signal (NR-SS) and a New Radio Physical Broadcast Channel (New Radio Physical Broadcast Channel, NR-PBCH) signal. NR-SS is divided into two parts: New Radio Primary Synchronized Signal (NR-PSS) and New Radio Secondary Synchronized Signal (NR-SSS), and the generation of NR-SS sequence is related to the physical cell The PCI (Physical Cell Identifier, PCI) has a fixed mapping relationship. After detecting the SSB, the terminal can obtain the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/16H04W48/20H04W52/02
CPCH04W48/16H04W48/20H04W52/0209Y02D30/70
Inventor 鲍炜杨晓东刘思綦
Owner VIVO MOBILE COMM CO LTD
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