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Listen before talk operation execution method and device, storage medium, terminal and base station

A technology of listening first, talking first, and executing methods, which is applied in the field of communication, can solve problems such as the inability to directly apply LAA technology, and achieve the effects of improving access efficiency, increasing channel access opportunities, and avoiding dynamic changes

Active Publication Date: 2020-06-16
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unlike the Long Term Evolution (LTE) system license assisted access (LAA) technology, LAA technology cannot be directly applied

Method used

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  • Listen before talk operation execution method and device, storage medium, terminal and base station
  • Listen before talk operation execution method and device, storage medium, terminal and base station

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0060] When the base station performs downlink transmission in the unlicensed spectrum BWP, the base station needs to perform LBT on the BWP. When the bandwidth of the BWP is greater than 20MHz, the BWP is associated with multiple sub-bands, and the base station can (M is a positive integer) LBT is performed on sub-frequency bands. The bandwidth of the sub-frequency band is equal to the bandwidth of the basic unit of the LBT, that is, 20 MHz. The multiple sub-bands and the BWP overlap partially or fully in the frequency domain. Before a data transmission, the base station may generate a backoff count value of a backoff counter (backoff counter) on each of the M sub-frequency bands. In a specific implementation, the backoff count values ​​on the M sub-frequency bands may be independently generated. Alternatively, the backoff count values ​​on the M sub-frequency bands are the same, and may be a value randomly selected from independently generated backoff count values. Alte...

specific Embodiment 2

[0086] When a terminal (for example, NR UE) performs uplink transmission on an unlicensed spectrum BWP, the terminal needs to perform LBT on the BWP. If the bandwidth of a single BWP is greater than 20MHz, and the BWP is associated with multiple sub-bands, the terminal may decide to use the sub-bands according to the received scheduling information. (M is a positive integer) LBT is performed on sub-frequency bands, and the width of the sub-frequency bands is 20 MHz. The multiple sub-bands and the BWP overlap partially or completely in the frequency domain. Before uplink transmission, the terminal needs to generate a backoff count value on each of the M sub-frequency bands. When the terminal succeeds in LBT on some sub-frequency bands, data transmission can be performed on these sub-frequency bands.

[0087] After the current data transmission ends, the terminal still has data to be transmitted, and when the terminal performs the next data transmission, the data transmissi...

specific Embodiment 3

[0143] When the current data transmission is downlink transmission, and the next data transmission is uplink transmission, the following rules may be adopted for performing LBT by the unlicensed spectrum BWP:

[0144] After the current data transmission ends, the terminal still has data to be transmitted, and when the time interval between the current data transmission and the next data transmission is less than 16 μs, after the current data transmission and before the next data transmission, the terminal There is no need to perform LBT on the sub-frequency band where the base station has performed the current data transmission, and the next data transmission can be directly performed.

[0145] After the end of the current data transmission, when the time interval between the current data transmission and the next data transmission is less than 16 μs, if the frequency domain resource used for the next data transmission is located in the sub-band before the current data transmis...

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Abstract

The invention discloses a listen before talk operation execution method and device, a storage medium, a terminal and a base station. The execution method comprises the following steps: determining a plurality of sub-bands associated with an unlicensed spectrum BWP; for the plurality of sub-bands, respectively executing listen-before-talk operation; and for the sub-band which fails to execute the listen before talk operation at present, when the next data transmission is carried out, the data transmission starting position of the sub-band being the same as the data transmission starting positions of other sub-bands which successfully execute the listen before talk operation at present. Through the technical scheme provided by the invention, the listen before talk operation can be optimized,and the access efficiency of the broadband BWP deployed in the unlicensed spectrum resources is improved.

Description

technical field [0001] The present invention relates to the technical field of communication, and in particular to a method and device for executing a listen-before-speak operation, a storage medium, a terminal, and a base station. Background technique [0002] Currently, in the Fifth-Generation mobile communications (5G for short) New Radio (NR for short) unlicensed spectrum system, different base stations or user equipment (User Equipment, UE for short) listen first and then Listen Before Talk (LBT for short) competes for shared unlicensed (Unlicensed, also known as license-free) spectrum resources. LBT is a technique for avoiding channel access conflicts. The UE performs LBT with a 20MHz bandwidth frequency band as a basic unit. If it is detected in the Clear Channel Assessment (CCA) that the energy within the 20MHz bandwidth is higher than the preset threshold, it means that the channel with the 20MHz bandwidth is a "busy" channel and is occupied by other devices. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/20H04B17/382
CPCH04W28/20H04B17/382Y02D30/70
Inventor 沈兴亚
Owner SPREADTRUM COMM (SHANGHAI) CO LTD