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Unlicensed frequency band channel occupation determination method, unlicensed frequency band channel occupation sending method and communication equipment

A technology of unlicensed frequency bands and communication equipment, which is applied to the determination method of unlicensed frequency band channel occupancy, transmission method and communication equipment field, which can solve the problems of long signal or channel detection time, low resource utilization rate, unlicensed frequency band channel occupancy, etc. , to achieve the effect of improving channel utilization, increasing speed, and shortening detection time

Active Publication Date: 2021-08-13
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a method for determining channel occupancy in an unlicensed frequency band, a sending method, and a communication device to solve the existing The problem of low resource utilization

Method used

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  • Unlicensed frequency band channel occupation determination method, unlicensed frequency band channel occupation sending method and communication equipment
  • Unlicensed frequency band channel occupation determination method, unlicensed frequency band channel occupation sending method and communication equipment
  • Unlicensed frequency band channel occupation determination method, unlicensed frequency band channel occupation sending method and communication equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] The base station sends a Wideband RS, which can be a Wideband DMRS, TRS, etc. The FBE UE performs corresponding signal detection at the configured position. If the UE detects the corresponding signal, it indicates that the base station occupies the channel, and the UE can perform uplink transmission on the channel. If the UE does not detect the corresponding signal, it indicates that the base station fails to occupy the channel, and at the same time, the UE may stop other information detection. For example, the RS is the Wideband DMRS of the PDCCH, and if the UE does not detect the DMRS, it does not need to monitor the Control Resource Set (CORESET). Wideband DMRS can be sent separately.

Embodiment 2

[0120] The DL Signal can be sent periodically, and the period can be less than or equal to the FFP. DL Signal can be sent at the start of each FFP, for example Figure 4 The starting position of FFP1 and FFP2 in .

[0121] When the period of DL Signal is shorter than FFP, DL Signal can also be sent within FFP, such as Figure 4 The second DL Signal in FFP2. The advantage of the DL Signal period being shorter than the FFP is that for a Discontinuous Reception (DRX) UE, when the UE enters DRX ON after sending the DL Signal at the FFP start position, there may be other opportunities to detect the DL Signal. For example Figure 4 UE2 in , misses the DL Signal at the starting position of FFP2, can detect the DL Signal at other positions in FFP2, and then perform uplink transmission.

Embodiment 3

[0123] The position of the DL Signal in the frequency domain can be shifted by the base station. When the DL Signal is the Wideband DMRS of the PDCCH, by shifting the position of the CORESET in the frequency domain, the Wideband DMRS is shifted in the frequency domain, thereby reducing the reception interference at the UE.

[0124] In the above embodiment, the base station sends the DL Signal in the FFP, and the sending position includes at least the starting position of the FFP; the DL Signal can be a Wideband RS, and the sending period can be less than or equal to the FFP; if the Wideband RS is the Wideband DMRS of the PDCCH, then the FBE UE Wideband DMRS must be detected, but CORESET may not be detected; the position of DL Signal in the frequency domain can be shifted.

[0125] Through the above embodiments, the FBE UE can quickly detect whether the base station occupies a channel, so as to decide whether to share the COT of the base station.

[0126] see Figure 5 , Fi...

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Abstract

The invention provides an unlicensed frequency band channel occupation determination method, a sending method and communication equipment. The method for determining the occupation of the unauthorized frequency band channel comprises the following steps: determining that a second communication device occupies a channel under the condition that a first signal sent by the second communication device is detected, wherein the first signal is a signal supporting independent detection.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular to a method for determining channel occupancy in an unlicensed frequency band, a sending method, and a communication device. Background technique [0002] In the future communication system, the unlicensed frequency band (Unlicensed Band) can be used as a supplement to the licensed frequency band (Licensed Band) to help operators expand the service capacity. When the initiating node needs to use the unlicensed frequency band to send information, it needs to do Listen Before Talk (LBT) first, and perform power detection (EnergyDetection, ED) on the surrounding nodes. When the detected power is lower than a threshold , the channel is considered to be empty (Idle), and the initiating node can send; otherwise, the channel is considered to be busy, and the initiating node cannot send. After the initiating node starts sending, it can authorize one or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
CPCH04W74/0808H04W74/08
Inventor 姜蕾潘学明沈晓冬
Owner VIVO MOBILE COMM CO LTD