Methods and systems of LBT adaptation and beam operation with interference handling for supporting NR above 52.6 GHz

Patent metadata

Field	Value
Publication number	US-12484086-B2
Application number	US-202118249165-A
Country	US
Kind code	B2
Filing date	Oct 15, 2021
Priority date	Oct 15, 2020
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

LBT adaptation, beam operation, and/or interference handling may be performed by wireless communication devices in NR above 52.6 GHZ. In an example, a wireless communications device may send information on a channel. The channel may comprise a Physical Downlink Control Channel (PDCCH), a Physical Downlink Shared Data Channel (PDSCH), or a Physical Random Access Channel (PRACH). The wireless communications device may receive, from a user equipment (UE), one or more ready to receives (RTRs). The wireless communications device may determine, based on a number of consecutive RTRs of the one or more RTRs, a listen before talk (LBT) mode. The LBT mode may be associated with staying or switching to a no receiver assistance mode or staying or switching to a receiver assistance mode.

First claim

What is claimed is:

1 . A wireless transmit/receive unit (WTRU), comprising a transceiver and one or more processors, configured to:
receive, from a base station, downlink control information (DCI) indicating: a listen before talk (LBT) mode indication, an LBT sub-mode indication, a ready to receive (RTR) indication, and a plurality of thresholds, wherein each threshold of the plurality of thresholds is associated with a respective level of hidden node detection; perform, based on the LBT mode indication and the LBT sub-mode indication, a measurement; and on condition that the RTR indication indicates that an RTR is requested:
determine, based on a threshold of the plurality of thresholds, a level of hidden node detection indicated by the measurement, and
send an indication of the determined level of hidden node detection.

2 . The WTRU of claim 1 , wherein the determined level of hidden node detection comprises: no hidden node detection, light hidden node detection, moderate hidden node detection, or severe hidden node detection.

3 . The WTRU of claim 1 , wherein the LBT mode indication indicates whether LBT is to be performed.

4 . The WTRU of claim 1 , wherein the LBT sub-mode indication indicates: directional LBT with receiver assistance, directional LBT without receiver assistance, omni-directional LBT with receiver assistance, or omni-directional LBT without receiver assistance.

5 . The WTRU of claim 1 , wherein RTR indication indicates whether receiver assistance is requested.

6 . The WTRU of claim 1 , wherein the indication of the determined level of hidden node detection is sent via a physical uplink control channel (PUCCH).

7 . The WTRU of claim 1 , further configured to:
receive, in response to the indication of the determined level of hidden node detection, from the base station, data.

8 . A method for use in a wireless transmit/receive unit (WTRU), the method comprising:
receiving, from a base station, downlink control information (DCI) indicating: a listen before talk (LBT) mode indication, an LBT sub-mode indication, a ready to receive (RTR) indication, and a plurality of thresholds, wherein each threshold of the plurality of thresholds is associated with a respective level of hidden node detection; performing, based on the LBT mode indication and the LBT sub-mode indication, a measurement; and on condition that the RTR indication indicates that an RTR is requested:
determining, based on a threshold of the plurality of thresholds, a level of hidden node detection indicated by the measurement, and
sending an indication of the determined level of hidden node detection.

9 . The method of claim 8 , wherein the determined level of hidden node detection comprises: no hidden node detection, light hidden node detection, moderate hidden node detection, or severe hidden node detection.

10 . The method of claim 8 , wherein the LBT mode indication indicates whether LBT is to be performed.

11 . The method of claim 8 , wherein the LBT sub-mode indication indicates: directional LBT with receiver assistance, directional LBT without receiver assistance, omni-directional LBT with receiver assistance, or omni-directional LBT without receiver assistance.

12 . The method of claim 8 , wherein RTR indication indicates whether receiver assistance is requested.

13 . The method of claim 8 , wherein the indication of the determined level of hidden node detection is transmitted via a physical uplink control channel (PUCCH).

14 . The method of claim 8 , further comprising:
receiving, in response to the indication of the determined level of hidden node detection, from the base station, data.

15 . An apparatus, comprising a transceiver and one or more processors, configured to:
transmit, to a wireless transmit/receive unit (WTRU), downlink control information (DCI) indicating: a listen before talk (LBT) mode indication, an LBT sub-mode indication, a ready to receive (RTR) indication indicating that an RTR is requested, and a plurality of thresholds, wherein each threshold of the plurality of thresholds is associated with a respective level of hidden node detection; receive, from the WTRU, based on the LBT mode indication and the LBT sub-mode indication, an indication of a level of hidden node detection based on a threshold of the plurality of thresholds; and send, to the WTRU, in response to the indication of the determined level of hidden node detection, data.

16 . The apparatus of claim 15 , wherein the determined level of hidden node detection comprises: no hidden node detection, light hidden node detection, moderate hidden node detection, or severe hidden node detection.

17 . The apparatus of claim 15 , wherein the LBT mode indication indicates whether LBT is to be performed.

18 . The apparatus of claim 15 , wherein the LBT sub-mode indication indicates: directional LBT with receiver assistance, directional LBT without receiver assistance, omni-directional LBT with receiver assistance, or omni-directional LBT without receiver assistance.

19 . The apparatus of claim 15 , wherein RTR indication indicates whether receiver assistance is requested.

20 . The apparatus of claim 15 , wherein the indication of the determined level of hidden node detection is received via a physical uplink control channel (PUCCH).

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Pan Kyle
• Svedman Patrick
• Zhang Guodong
• Tsai Allan
• Awadin Mohamed
• Adjakple Pascal
• Li Yifan
• Chen Zhuo

Classifications

• H04W72/232

  the control data signalling from the physical layer, e.g. DCI signalling · CPC title

• H04W74/006 Primary

  in the downlink, i.e. towards the terminal · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W74/0808 Primary

  using carrier sensing, e.g. carrier sense multiple access [CSMA] · CPC title