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A listen-before-send transmission method, device and system

A transmission method and technology of network equipment, applied in transmission systems, transmission monitoring, electrical components, etc., can solve problems such as low efficiency of high-frequency band systems, and achieve the effect of effectively using high-frequency and large-bandwidth resources

Active Publication Date: 2022-03-22
CHINA ACADEMY OF INFORMATION & COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application proposes a listening-before-send transmission method, device, and system to solve the problem of low efficiency in high-frequency band systems

Method used

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  • A listen-before-send transmission method, device and system
  • A listen-before-send transmission method, device and system
  • A listen-before-send transmission method, device and system

Examples

Experimental program
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Embodiment 1

[0090] The LBT bandwidth in this embodiment has two values, corresponding to the unlicensed spectrum in the low frequency band and the unlicensed spectrum in the high frequency band respectively. The corresponding bandwidth value of the unlicensed spectrum in the low-frequency band is A; the corresponding bandwidth value of the unlicensed spectrum in the high-frequency band is B. The typical value of A is 20MHz; the typical value of B is 160MHz, 200MHz, 320MHz, 400MHz, etc. The sub-carrier spacing using A also has certain restrictions, such as A is only applicable to 15kHz and 30kHz. Similarly, B also has applicable subcarrier spacing, such as 60kHz, 120kHz, 240kHz.

[0091]Table 3. Example 1 using 2 types of LBT bandwidth

[0092] LBT bandwidth Applicable frequency band Applicable subcarrier spacing 20MHz 6GHz and below 15kHz, 30kHz 160MHz Above 6GHz 60kHz, 120kHz, 240kHz

[0093] Table 3 shows an example of using a 20MHz LBT for 6GHz an...

Embodiment 2

[0100] The LBT bandwidth described in this embodiment has three values, which respectively correspond to three frequency bands of the unlicensed spectrum. The corresponding bandwidth values ​​of the three unlicensed frequency bands are A, B, and C. The typical value of A is 20MHz; the typical value of B is 80MHz, 100MHz, 160MHz, etc., and the typical value of C is 160MHz, 200MHz, 320MHz, etc. Similar to Embodiment 1, the subcarrier spacing corresponding to different LBT bandwidths is also limited.

[0101] Table 5. Example of using 3 kinds of LBT bandwidth

[0102]

[0103]

[0104] Table 5 gives an example using three LBT bandwidths. At this time, A, B, and C take values ​​of 20MHz, 80MHz, and 160MHz, respectively. The LBT bandwidth of 20MHz is suitable for two subcarrier spacings of 15kHz and 30kHz; the LBT bandwidth of 80MHz is suitable for two subcarrier spacings of 60kHz and 120kHz; and the 160MHz is suitable for subcarrier spacing of 120kHz and 240kHz.

[0105]...

Embodiment 3

[0109] The LBT bandwidth described in this embodiment has multiple values, and the one-to-one correspondence relationship is no longer satisfied for some frequency bands and different subcarrier intervals. This same frequency band can be applied to various LBT bandwidths and subcarrier spacings and also has its applicable scenarios. For the 52.6GHz-71GHz frequency band, there is a large amount of unlicensed spectrum, the available bandwidth is above 1GHz, and the maximum continuous available spectrum is above 6GHz. To use such a large bandwidth, in order to reduce overhead, the LBT bandwidth also needs to be relatively large, and it is very necessary to use an LBT bandwidth above 300MHz. The larger LBT bandwidth also has its limitations, especially the reduced ability to detect narrowband interference, which makes it susceptible to interference. At the same time, network equipment adopts large LBT bandwidth, and terminal power consumption will also increase accordingly. It is...

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Abstract

This application discloses a listen-before-send transmission method for 5G systems, including: LBT bandwidth, determined according to the signal carrier frequency and subcarrier spacing: when the first frequency of the signal carrier is greater than the second frequency, correspondingly, the LBT first frequency A bandwidth is not smaller than the second bandwidth; when the first subcarrier spacing is greater than the second subcarrier spacing, correspondingly, the first LBT bandwidth is not smaller than the second bandwidth; the LBT bandwidth includes at least 2 alternative values. The present application also includes a terminal device, a network device and a mobile communication system using the method. The method, device and system provided by the invention realize the high-frequency LBT process, and especially can efficiently perform system access in the high-frequency unlicensed frequency band.

Description

technical field [0001] The present application relates to the technical field of mobile communication, and in particular to a listen-before-send transmission method, device and system. Background technique [0002] The 5G new air interface (NR) has completed two versions, R15 and R16. According to the current version, it supports up to 52.6GHz. According to the original vision of 5G, the design of 5G NR needs to support the use of 100GHz frequency. In higher frequency bands, it is necessary to consider supporting larger bandwidth while overcoming the adverse effects of large path loss, so it is necessary to enhance the existing NR design. [0003] The frequency band above 52.6GHz has a wider bandwidth than the lower frequency band, and there are a large number of unlicensed frequency bands. In view of these characteristics, it is necessary to consider adopting a larger subcarrier spacing and taking into account the design of unlicensed access. Access in the unlicensed fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/382H04W72/04
CPCH04B17/382H04W72/0453
Inventor 刘晓峰魏贵明杜滢闫志宇焦慧颖沈霞徐菲
Owner CHINA ACADEMY OF INFORMATION & COMM