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Initial signal transmission method and device and user equipment

A technology of initial signal and initial part, applied in the direction of multiple use of transmission path, transmission system, digital transmission system, etc., can solve the problem of CORESET detection position not being mentioned or indicated, so as to reduce the complexity of blind detection and increase flexibility sexual effect

Active Publication Date: 2020-04-07
SPREADTRUM SEMICON (NANJING) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The prior art discusses the importance of the initial signal, and proposes that the base station sends the initial signal to trigger the UE to perform CORESET (Control-Resource Set, control resource set) detection after the LBT is successful, but the detection position of the CORESET is not mentioned or instructed

Method used

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  • Initial signal transmission method and device and user equipment
  • Initial signal transmission method and device and user equipment
  • Initial signal transmission method and device and user equipment

Examples

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Embodiment 1

[0033] After the gNB successfully performs the LBT, an initial signal is sent. CORESET detection in the initial partial slot is triggered by the initial signal. The initial signal indicates the number, period and position of the CORESET search space (search space) in the initial partial slot of the COT. After receiving the initial signal, the UE performs CORESET detection at the corresponding location. A schematic diagram is given below.

[0034] Such as figure 2 As shown, the initial signal indicates that the number of search spaces is 4, and the period is 2 symbols;

[0035] Such as image 3 As shown, the initial signal indicates that the number of search spaces is 2 and the period is 4 symbols;

[0036] Such as Figure 4 As shown, the initial signal indicates that the number of search spaces is 1, and the period is 7 symbols;

[0037] in, image 3 A partial slot is hollowed out because the base station may not be ready to transmit data immediately after the LBT is ...

Embodiment 2

[0039] After the gNB successfully performs the LBT, an initial signal is sent. CORESET detection in the initial partial slot is triggered by the initial signal. The initial signal indicates the composition of the initial partial slot of the COT. The partial slot is composed of one or more mini-slots (mini-slots) with a length of 2, 4 or 7 OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbols, and the corresponding CORESET in the initial partial slot The detection location is pre-configured or indicated by RRC (Radio Resource Control, radio resource control) signaling. There are two ways to indicate:

[0040] (1) Combining instruction tables through different PSS (Primary Synchronization Signal, primary synchronization signal) / SSS (Secondary Synchronization Signal, secondary synchronization signal) sequences;

[0041] (2) Tables are indicated through different initialization sequences.

[0042] As shown in Table 1, the Initial s...

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Abstract

The invention provides an initial signal transmission method and device and user equipment. The method comprises: receiving an initial signal sent by a base station after successful execution of LBT,the initial signal indicating related information of a search space of CORESET in a time initial part time slot occupied by a channel, or the initial signal indicating composition of the time initialpart time slot occupied by the channel; and executing CORESET detection at a corresponding position according to the related information of the search space of the CORESET in the time slot of the initial part of the channel occupation time or the composition of the time slot of the initial part of the channel occupation time. According to the invention, the detection position of the CORESET can beindicated, the blind detection complexity of the UE is reduced, and the purpose of saving energy is achieved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to an initial signal transmission method, device and user equipment. Background technique [0002] With the rapid development of smart phones, the continuous improvement of network speed provides the necessary infrastructure for mobile phones to run multiple functions at the same time, which also leads to the rapid consumption of terminal power, which will directly affect user experience. Therefore, the demand for energy saving of terminals continues to increase. [0003] In the NR (New Radio, new air interface) unlicensed spectrum system, if the base station wants to transmit data to users through a certain channel, it must first detect whether a certain channel is idle through the LBT (Listen Before Talk, listen before talk) mechanism. After the LBT is successful, the user performs blind detection of the PDCCH (Physical Downlink Control Channel, physical do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04L5/00
CPCH04L5/0094H04L5/0053H04L5/0048H04W72/23Y02D30/70
Inventor 刘莹莹沈兴亚
Owner SPREADTRUM SEMICON (NANJING) CO LTD
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