Downlink transmission detection method, apparatus and device, and storage medium

A detection method, a technology to be detected, applied in the communication field

Active Publication Date: 2019-12-03
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the 5G system, there is no downlink transmission that will always be sent, so how the terminal detects the channel occupancy of the base station on the unlicensed frequency band has become a new technical problem

Method used

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  • Downlink transmission detection method, apparatus and device, and storage medium
  • Downlink transmission detection method, apparatus and device, and storage medium
  • Downlink transmission detection method, apparatus and device, and storage medium

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Embodiment Construction

[0126] Before introducing and describing the embodiments of the present disclosure, the channel detection mechanism involved in the present disclosure is explained first.

[0127] Channel detection mechanisms can generally include the following five types:

[0128] The first type (LBT Cat.1): does not contain LBT, that is, the terminal does not need to perform channel detection before transmitting information, and directly sends information. LBT can also be referred to as a listening and avoiding mechanism, which is used to realize effective sharing of unlicensed spectrum. LBT requires monitoring the channel before transmitting information, performing CCA (Clear Channel Assessment, channel idle assessment), and then transmitting after ensuring that the channel is idle.

[0129] The second (LBT Cat.2): LBT mechanism without random backoff process. Before the terminal transmits information, it only needs to detect a time granularity. For example, the time granularity can be 25...

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Abstract

Provided are a downlink transmission detection method, apparatus and device, and a storage medium, which belong to the field of communications, the method comprising: a terminal acquires first configuration information, the terminal determines a detection parameter of downlink transmission according to the first configuration information, and the terminal detects downlink transmission on an unlicensed frequency band according to the detection parameter. According to the embodiment of the invention, the terminal can dynamically detect the downlink transmission according to the first configuration information; according to the invention, the problem that the terminal cannot detect the channel occupation of the base station on the unlicensed frequency band due to no always transmitted downlink transmission in a 5G system is solved, so that the terminal can detect the occupation of the base station on the unlicensed frequency band in time, and the power consumption of the terminal is reduced.

Description

technical field [0001] The present disclosure relates to the communication field, and in particular to a detection method, device, equipment and storage medium for downlink transmission. Background technique [0002] The Third Generation Partnership Project (Third Generation Partnership Project, 3GPP) has carried out research on 5G unlicensed spectrum (New Radio Unlicensed, NR-U). [0003] In order to ensure the coexistence with other systems (such as Wi-Fi) on the unlicensed frequency band, a Listen Before Talk (LBT) mechanism is introduced. When the base station has data to send, it needs to detect whether the channel on the unlicensed frequency band is idle; only when the channel is idle, the base station can send data to the terminal. [0004] In a traditional method, after occupying a channel on an unlicensed frequency band, the base station sends a cell-specific reference signal (Cell-specific Reference Signal, CRS) on each subframe. However, in the 5G system, there ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W74/08H04L5/00
CPCH04W74/0808H04L5/0048H04L5/0053H04L5/0007H04W72/23H04W16/14H04L27/0006H04L5/0094H04L27/2655
Inventor 朱亚军
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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