Channel occupancy time in a no-listen before talk channel access mode

Patent metadata

Field	Value
Publication number	US-11540306-B2
Application number	US-202117150846-A
Country	US
Kind code	B2
Filing date	Jan 15, 2021
Priority date	Jan 15, 2021
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device (WCD) may communicate, during a channel occupancy time (COT) associated with one or more resources, via a no listen before talk (no-LBT) channel access mode. The WCD may initiate, after the COT, a reduced COT associated with the one or more resources, wherein the WCD is configured to reduce channel occupancy during the reduced COT. Numerous other aspects are described.

First claim

What is claimed is:

1. A method of wireless communication performed by a wireless communication device (WCD), comprising:
configuring the WCD based at least in part on configuration information associated with a reduced channel occupancy time (COT);
communicating, during a COT associated with one or more resources and based at least in part on configuring the WCD, via a no listen before talk (no-LBT) channel access mode; and
initiating, after the COT and based at least in part on detecting a gap in reception or transmission of communications, the reduced COT associated with the gap and the one or more resources, wherein the WCD is configured to reduce channel occupancy during the reduced COT.

2. The method of claim 1 , wherein, during the reduced COT, the WCD is configured to reduce communications by one or more of:
not initiating channel occupancy,
not transmitting data via a data channel,
not transmitting control information via a control channel,
not attempting to receive signals from an additional WCD,
not attempting to receive data via a data channel, or
not attempting to receive control information via a control channel.

3. The method of claim 1 , wherein, during the reduced COT, the WCD is configured to modify one or more communication parameters by one or more of:
reducing transmit power for transmissions,
reducing an effective isotropic radiated power for transmissions,
changing a traffic direction,
reducing a beamforming gain,
changing a beam direction, or
changing a direction of beamforming with a threshold angular separation.

4. The method of claim 1 , further comprising:
determining to initiate the reduced COT based at least in part on detecting the gap in reception or transmission of communications.

5. The method of claim 1 , wherein a duration of the reduced COT is based at least in part on one or more of:
a duration of the COT,
a configured amount of time,
a configured number of slots or subslots, or
a randomly generated amount of time drawn from a distribution that is based at least in part on the duration of the COT.

6. The method of claim 1 , wherein the COT is configured with a duration that satisfies a threshold duration for communicating via the one or more resources.

7. The method of claim 1 , wherein a duration of the COT is based at least in part on:
an amount of time of transmission or reception without the gap,
an amount of time of transmission or reception without the gap that satisfies a gap duration threshold,
an amount of time of transmission and reception without the gap, or
an amount of time of transmission and reception without the gap that satisfies the gap duration threshold.

8. The method of claim 1 , wherein a duration of the COT is based at least in part on:
an amount of time of communication with multiple additional WCDs without the gap, or
an amount of time of communication with multiple additional WCDs without the gap that satisfies a gap duration threshold.

9. The method of claim 1 , wherein initiating the reduced COT associated with the one or more resources comprises:
initiating the reduced COT for a set of resources within one or more frequency resources.

10. The method of claim 9 , wherein initiating the reduced COT for the set of resources within the one or more frequency resources comprises initiating the reduced COT for one or more of:
one or more physical resource blocks,
one or more component carriers,
one or more bandwidth parts, or
one or more LBT bandwidths.

11. The method of claim 1 , wherein a duration of the COT is based at least in part on:
an amount of time of communication via a set of beams without the gap,
an amount of time of communication via a set of beams without the gap that satisfies a gap duration threshold,
an amount of time of communication via all beams, associated with the WCD, without the gap, or
an amount of time of communication via all beams, associated with the WCD, without the gap that satisfies a gap duration threshold.

12. The method of claim 1 , wherein initiating the reduced COT associated with the one or more resources comprises:
initiating the reduced COT for communication associated with a set of beams, or
initiating the reduced COT for communication associated with all beams associated with the WCD.

13. A wireless communication device (WCD), comprising:
a memory; and
one or more processors coupled to the memory, the one or more processors configured to:
configure the WCD based at least in part on configuration information associated with a reduced channel occupancy time (COT);
communicate, during a COT associated with one or more resources and based at least in part on configuring the WCD, via a no listen before talk (no-LBT) channel access mode; and
initiate, after the COT and based at least in part on detecting a gap in reception or transmission of communications, the reduced COT associated with the gap and the one or more resources, wherein the WCD is configured to reduce channel occupancy during the reduced COT.

14. The WCD of claim 13 , wherein, during the reduced COT, the WCD is configured to reduce communications by one or more of:
not initiating channel occupancy,
not transmitting data via a data channel,
not transmitting control information via a control channel,
not attempting to receive signals from an additional WCD,
not attempting to receive data via a data channel, or
not attempting to receive control information via a control channel.

15. The WCD of claim 13 , wherein, during the reduced COT, the WCD is configured to modify one or more communication parameters by one or more of:
reduce transmit power for transmissions,
reduce an effective isotropic radiated power for transmissions,
change a traffic direction,
reduce a beamforming gain,
change a beam direction, or
change a direction of beamforming with a threshold angular separation.

16. The WCD of claim 13 , wherein the one or more processors are further configured to:
determine to initiate the reduced COT based at least in part on detecting the gap in reception or transmission of communications.

17. The WCD of claim 13 , wherein a duration of the reduced COT is based at least in part on one or more of:
a duration of the COT,
a configured amount of time,
a configured number of slots or subslots, or
a randomly generated amount of time drawn from a distribution that is based at least in part on the duration of the COT.

18. The WCD of claim 13 , wherein the COT is configured with a duration that satisfies a threshold duration for communicating via the one or more resources.

19. The WCD of claim 13 , wherein a duration of the COT is based at least in part on:
an amount of time of transmission or reception without the gap,
an amount of time of transmission or reception without the gap that satisfies a gap duration threshold,
an amount of time of transmission and reception without the gap, or
an amount of time of transmission and reception without the gap that satisfies the gap duration threshold.

20. The WCD of claim 13 , wherein a duration of the COT is based at least in part on:
an amount of time of communication with multiple additional WCDs without the gap, or
an amount of time of communication with multiple additional WCDs without the gap that satisfies a gap duration threshold.

21. The WCD of claim 13 , wherein the one or more processors, to initiate the reduced COT associated with the one or more resources, are configure to:

Assignees

• Qualcomm Inc
• Qualcomm Incorproated

Inventors

• Chande Vinay
• Sun Jing
• Chendamarai Kannan Arumugam
• Zhang Xiaoxia
• Damnjanovic Aleksandar
• Luo Tao

Classifications

• H04W74/0808 Primary

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

• H04W72/044

  based on the type of the allocated resource · CPC title

• H04W74/02

  Hybrid access · CPC title

• H04W72/1268 Primary

  of uplink data flows · CPC title

• H04W72/12 Primary

  Wireless traffic scheduling · CPC title