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Method for searching physical cell identifier, computer readable storage medium and small base station

A technology of physical cell identification and current cell, which is applied in the field of communication, can solve the problems of large amount of calculation and high error probability of SSB beam with the strongest received signal, and achieve the effect of reducing error detection probability

Active Publication Date: 2022-03-04
深圳磊诺科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for searching for a physical cell ID, a computer-readable storage medium and a small base station, aiming to solve the problem of searching for a physical cell ID in the prior art by directly using the sliding correlation method in the time domain to retrieve the PSS sequence The calculation amount of the method is large, and the error probability of searching for the strongest SSB beam is high when there is a carrier frequency offset in the received signal

Method used

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  • Method for searching physical cell identifier, computer readable storage medium and small base station
  • Method for searching physical cell identifier, computer readable storage medium and small base station
  • Method for searching physical cell identifier, computer readable storage medium and small base station

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Effect test

Embodiment 1

[0042] see figure 1 , the SSB of 5G NR occupies 240 subcarriers in the frequency domain and 4 OFDM symbols in the time domain. Wherein the PSS and SSS are respectively located in the 56th to 182nd subcarrier positions of the first OFDM symbol and the third OFDM symbol of the SSB. The cell synchronization search process is to find out the positions of the PSS and SSS, and determine the PCI of the current cell from the information carried by the PSS and SSS.

[0043] When the SSB is in different carrier frequency bands and different subcarrier spaces (Subcarrier Space, SCS), the number of repetitions of different time slots will be different, which makes it necessary to consider the distance between the PSS sequences when detecting the PSS sequence in the SSB. The scene changes. The transmission of SSB in the time domain adopts BeamSweep (beam scanning) technology, which can be configured to form multiple SSB beams to multiple different directions within a half-frame period, s...

Embodiment 2

[0088] Embodiment 2 of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method of searching for a physical cell identifier as provided in Embodiment 1 of the present invention is implemented. method steps.

Embodiment 3

[0090] Figure 7 A specific structural block diagram of a small base station provided in Embodiment 3 of the present invention is shown. A small base station 100 includes: one or more processors 101, memories 102, and one or more computer programs, wherein the processors 101 and The memory 102 is connected by a bus, the one or more computer programs are stored in the memory 102, and configured to be executed by the one or more processors 101, and the processor 101 executes the computer The program is the steps to realize the method for searching the physical cell ID provided in Embodiment 1 of the present invention.

[0091] In the present invention, due to the time-domain image conjugate symmetry of the PSS sequence, the position of the strongest PSS signal is determined by the sliding autocorrelation method, and the position of the strongest SSB beam in the current cell is finally determined by the position of the strongest PSS signal. The error probability of searching for...

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Abstract

The invention is applicable to the communication field, and provides a method for searching physical cell identifiers, a computer-readable storage medium and a small base station. The method includes: adopting the time-domain image conjugate symmetry characteristics of the PSS sequence, using the sliding autocorrelation method to determine the strongest PSS signal position, and finally determining the strongest SSB beam position in the current cell from the strongest PSS signal position; using different PSS The sequence is cyclically shifted in the frequency domain, and the present invention, which is expressed by obtaining the received PSS sequence in the frequency domain, reduces the error probability of searching for the strongest SSB beam when there is a carrier frequency offset in the received signal, and reduces the error probability of searching the strongest SSB beam directly in the time domain. The amount of calculation brought about by calculating the sliding correlation between the three PSS local sequences and the received wireless frame.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a method for searching a physical cell ID, a computer-readable storage medium and a small base station. Background technique [0002] Typical application scenarios of 5G NR (New Radio) mobile communication networks require low latency, large capacity, and the Internet of Everything. At present, the NR base station facility network has been constructed and deployed around the world, and the domestic management department has also issued 5G licenses to operators to officially launch 5G commercial use. Due to its relatively high carrier characteristics, the coverage of 5G is smaller than that of traditional base stations. Especially for 5G base stations deployed in the millimeter wave frequency band, its working wavelength has poorer penetration ability to obstacles and the base station coverage radius is smaller. Small. It is foreseeable that the 5G network needs to build a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04W56/00
CPCH04L27/2657H04L27/2668H04W56/0035
Inventor 刘海溶许进
Owner 深圳磊诺科技有限公司
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