# US 12,764,783 B2 · Adaptive listen-before-talk mode selection

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- Number: US 12,764,783 B2
- Document ID: US12764783B2
- Status: Granted
- Kind: B2
- Application number: 18/271,293
- Filed: 2022-01-11
- Published: 2024-09-12
- Granted: 2026-10-13
- Earliest claimed: 2021-01-13
- Assignees: Nokia Technologies Oy
- Applicants: Nokia Technologies Oy
- Inventors: Karol Schober; Kari Juhani Hooli; Timo Erkki Lunttila; Esa Tapani Tiirola
- Web page: https://patentgrep.com/patent/US12764783B2

## CPC

- H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA]
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

There is provided an apparatus, a method and a computer program product. In accordance with an embodiment the method comprises obtaining one or more configurations for at least one of a listen-before-talk on-mode and one or more configurations for a listen-before-talk off-mode, wherein each configuration includes at least one functionality specific to the associated listen-before-talk mode; determining which listen-before-talk mode shall be applied; examining which of the one or more configurations is associated with the indicated listen-before-talk mode; selecting the configuration associated with the indicated listen-before-talk mode; and activating or deactivating one or more of the functionalities defined by the selected configuration in the operation of the user equipment.

## Claims

### Claim 1

A user equipment comprising:
at least one processor; and
at least one memory storing instruction that, when executed on the at least one processor cause the user equipment to perform:
obtaining one or more configurations for at least one of a listen-before-talk on-mode and a listen-before-talk off-mode, wherein each configuration includes at least one functionality specific to an associated listen-before-talk mode;
examining which of the one or more configurations is associated with an indicated listen-before-talk mode;
selecting the configuration associated with the indicated listen-before-talk mode; and
activating or deactivating the at least one functionality defined by the selected configuration in the operation of the user equipment,
wherein the functionalities include one or more of the following:
slot format determination;
physical downlink control channel monitoring behavior;
user equipment discontinuous reception (DRX) and power saving features;
interference measurements and reporting;
channel state information measurements and reporting,
wherein the activating or deactivating one or more of the functionalities comprises determining, based on the determined listen-before-talk mode, one or more of the following:
in slot format determination, whether the UE follows a semi-static Time Division Duplexing (TDD) configuration, or dynamic slot format adaptation based on an indication of Group Common-Physical Downlink Control Channel (PDCCH);
in physical downlink control channel monitoring, whether a physical downlink control channel search space group switching is disabled or enabled;
in DRX, whether the UE operates according to an OnDuration timer or according to a reduced OnDuration timer;
in interference measurements and reporting, whether averaging of interference measurements across multiple time instances is allowed or not;
in channel state measurements and reporting, whether averaging of channel state information measurements across multiple time instances is allowed or not.

### Claim 2 (depends on 1)

The user equipment according to claim 1, wherein the determining comprises determining the listen-before-talk mode implicitly based on the associated configuration or explicitly based on an explicit indication.

### Claim 3 (depends on 1)

The user equipment according to claim 1, wherein the determining comprises determining the listen-before-talk mode based on one or more of the following:
a received indication;
a link direction;
a bandwidth part;
a beam;
a beam pattern;
a beam pair link.

### Claim 4 (depends on 1)

The user equipment according to claim 1, wherein the instructions, when executed by the at least one processor, further cause the user equipment to perform:
receiving the one or more configurations from a communication network; and storing the received configurations.

### Claim 5 (depends on 4)

The user equipment according to claim 4, wherein the determining which listen-before-talk mode shall be applied obtains the indication by one of the following:
a radio resource control signalling; a media access control control element; layer 1 signalling.

### Claim 6 (depends on 5)

The user equipment according to claim 5, wherein in listen-before-talk on-mode listen-before-talk procedure is performed prior to downlink transmissions only.

### Claim 7

A method comprising:
obtaining one or more configurations for at least one of a listen-before-talk on-mode and a listen-before-talk off-mode, wherein each configuration includes at least one functionality specific to an associated listen-before-talk-mode;
examining which of the one or more configurations is associated with an indicated listen-before-talk mode;
selecting the configuration associated with the indicated listen-before-talk mode; and
activating or deactivating the at least one functionality defined by the selected configuration in the operation of the user equipment,
wherein the functionalities include one or more of the following:
slot format determination;
physical downlink control channel monitoring behavior;
user equipment discontinuous reception (DRX) and power saving features;
interference measurements and reporting;
channel state information measurements and reporting,
wherein the activating or deactivating one or more of the functionalities comprises determining, based on the determined listen-before-talk mode, one or more of the following:
in slot format determination, whether the UE follows a semi-static Time Division Duplexing (TDD) configuration, or dynamic slot format adaptation based on an indication of Group Common-Physical Downlink Control Channel (PDCCH);
in physical downlink control channel monitoring, whether a physical downlink control channel search space group switching is disabled or enabled;
in DRX, whether the UE operates according to an OnDuration timer or according to a reduced OnDuration timer;
in interference measurements and reporting, whether averaging of interference measurements across multiple time instances is allowed or not;
in channel state measurements and reporting, whether averaging of channel state information measurements across multiple time instances is allowed or not.

### Claim 8 (depends on 7)

The method according to claim 7 comprising: determining the listen-before-talk mode implicitly based on the associated configuration or explicitly based on an explicit indication.

### Claim 9 (depends on 7)

The method according to claim 7, comprising determining the listen-before-talk mode based on one or more of the following:
a received indication;
a link direction;
a bandwidth part;
a beam;
a beam pattern;
a beam pair link.

### Claim 10 (depends on 7)

The method according to claim 7, comprising obtaining the indication by one of the following: a radio resource control signalling;
a media access control control element; layer 1 signalling.

### Claim 11 (depends on 7)

The method according to claim 7, comprising performing in listen-before-talk on-mode listen-before-talk procedure prior to downlink transmissions only.