Granted Patent B2

US 12,336,000 · App. 17/759,553 · Granted Jun 17, 2025

Inventors: Changlong Xu (Beijing, CN); Jing Sun (San Diego, CA); Xiaoxia Zhang (San Diego, CA)

Assignee: QUALCOMM Incorporated

H04W74/0808H04L27/2607H04W72/1268H04W72/23

Abstract

Claims (75)

1. A method of wireless communication, comprising:

receiving, by a user equipment (UE) from a base station (BS), one or more grants for a plurality of uplink transmissions in a shared radio frequency band;

determining, by the UE, a cyclic prefix (CP) extension length for a first uplink transmission of the plurality of uplink transmissions such that a first gap duration between a second uplink transmission of the plurality of uplink transmissions and the first uplink transmission satisfies a first time threshold for transmitting the first uplink transmission in the shared radio frequency band without a listen-before-talk (LBT), the second uplink transmission preceding the first uplink transmission, wherein the determining the CP extension length for the first uplink transmission is based on a transmission end time of the second uplink transmission and a transmission start time of the first uplink transmission scheduled by the one or more grants being spaced apart by a second gap duration satisfying a second time threshold;

applying, by the UE, a first CP extension having the CP extension length to the first uplink transmission; and

transmitting, by the UE to the BS in the shared radio frequency band, one or more uplink transmissions of the plurality of uplink transmissions, the transmitting the one or more uplink transmissions including transmitting the first uplink transmission with the first CP extension without performing the LBT.

2. The method of claim 1 , wherein the first time threshold is 16 microseconds (μs).

3. The method of claim 1 , wherein the applying the first CP extension includes:

prepending, by the UE, a beginning symbol of the first uplink transmission with the first CP extension.

4. The method of claim 1 , wherein the second time threshold is one symbol duration.

5. The method of claim 1 , wherein:

the receiving the one or more grants includes:

receiving, by the UE from the BS, an uplink grant of the one or more grants for at least the second uplink transmission, the uplink grant including a CP extension configuration, and the second uplink transmission being an earliest uplink transmission of the one or more uplink transmissions; and

the transmitting the one or more uplink transmissions include:

transmitting, by the UE to the BS, the second uplink transmission based on a second LBT, the second uplink transmission including a second CP extension based on the CP extension configuration.

6. The method of claim 1 , wherein the receiving the one or more grants includes:

receiving, by the UE, a downlink grant of the one or more grants for at least the first uplink transmission, the first uplink transmission including at least one of a physical uplink control channel (PUCCH) signal or a sounding reference signal (SRS).

7. The method of claim 1 , wherein the transmitting the one or more uplink transmissions includes:

transmitting, by the UE to the BS, the one or more uplink transmissions during a channel occupancy time (COT) of the BS.

8. A method of wireless communication, comprising:

receiving, by a user equipment (UE) from a base station (BS), one or more uplink grants for a plurality of uplink transmissions in a shared radio frequency band, wherein the one or more uplink grants include a first uplink grant for at least a first uplink transmission of the plurality of uplink transmissions, and wherein the first uplink grant includes a first cyclic prefix (CP) extension configuration;

determining, by the UE, whether to apply the first CP extension configuration to the first uplink transmission based on a time location of the first uplink transmission within the plurality of uplink transmissions, wherein the determining whether to apply the first CP extension configuration to the first uplink transmission is based on the first uplink transmission being preceded by a second uplink transmission; and

transmitting, by the UE to the BS in the shared radio frequency band, one or more uplink transmissions of the plurality of uplink transmissions, the first uplink transmission including a first CP extension length based on the determining.

9. The method of claim 8 , wherein the receiving the one or more uplink grants includes:

receiving, by the UE from the BS, the first uplink grant for the plurality of uplink transmissions, the first uplink grant including the first CP extension configuration for an earliest uplink transmission of the plurality of uplink transmissions.

10. The method of claim 9 , wherein the determining whether to apply the first CP extension configuration to the first uplink transmission includes:

determining, by the UE, to apply the first CP extension configuration to the first uplink transmission based on the first uplink transmission being after the earliest uplink transmission and adjacent to a gap duration exceeding a time threshold.

11. The method of claim 10 , wherein the time threshold is one symbol duration.

12. The method of claim 10 , further comprising:

applying, by the UE, the first CP extension to the first uplink transmission, the first CP extension based on the first CP extension configuration.

13. The method of claim 10 , further comprising:

performing, by the UE, a listen-before-talk (LBT) based on the first CP extension configuration before transmitting the first uplink transmission.

14. The method of claim 8 , wherein the receiving the one or more uplink grants includes:

receiving, by the UE from the BS, a second uplink grant for the second uplink transmission of the plurality of uplink transmissions, the second uplink transmission preceding the first uplink transmission.

15. The method of claim 14 , wherein the second uplink grant includes a second CP extension configuration for the second uplink transmission, and wherein the method further comprises:

determining, by the UE, the first CP extension length for the first uplink transmission based on the second CP extension configuration for the second uplink transmission.

16. The method of claim 14 , further comprising:

assigning, by the UE, a value of 0 to the first CP extension length based on the first uplink transmission being preceded by at least the second uplink transmission.

17. The method of claim 14 , further comprising:

refraining, by the UE, from performing a listen-before-talk (LBT) before the first uplink transmission.

18. The method of claim 8 , wherein the transmitting the one or more uplink transmissions includes:

transmitting, by the UE to the BS, the one or more uplink transmissions during a channel occupancy time (COT) of the BS.

19. A user equipment (UE) comprising:

a transceiver configured to receive, from a base station (BS), one or more grants for a plurality of uplink transmissions in a shared radio frequency band; and

a processor configured to:

determine a cyclic prefix (CP) extension length for a first uplink transmission of the plurality of uplink transmissions such that a first gap duration between a second uplink transmission of the plurality of uplink transmissions and the first uplink transmission satisfies a first time threshold for transmitting the first uplink transmission in the shared radio frequency band without a listen-before-talk (LBT), the second uplink transmission preceding the first uplink transmission, wherein the determining the CP extension length for the first uplink transmission is based on a transmission end time of the second uplink transmission and a transmission start time of the first uplink transmission scheduled by the one or more grants being spaced apart by a second gap duration satisfying a second time threshold; and

apply a first CP extension having the CP extension length to the first uplink transmission,

wherein the transceiver is further configured to transmit, to the BS in the shared radio frequency band, one or more uplink transmissions of the plurality of uplink transmissions, the first uplink transmission with the first CP extension transmitted without performing the LBT.

20. The UE of claim 19 , wherein the first time threshold is 16 microseconds (μs).

21. The UE of claim 19 , wherein the processor configured to apply the first CP extension is configured to:

prepend a beginning symbol of the first uplink transmission with the first CP extension.

22. The UE of claim 19 , wherein the second time threshold is one symbol duration.

23. The UE of claim 19 , wherein:

the transceiver configured to receive the one or more grants is configured to:

receive, from the BS, an uplink grant of the one or more grants for at least the second uplink transmission, the uplink grant including a CP extension configuration, and the second uplink transmission being an earliest uplink transmission of the one or more uplink transmissions; and

the transceiver configured to transmit the one or more uplink transmissions is configured to:

transmit, to the BS, the second uplink transmission based on a second LBT, the second uplink transmission including a second CP extension based on the CP extension configuration.

24. The UE of claim 19 , wherein the transceiver configured to receive the one or more grants is configured to:

receive a downlink grant of the one or more grants for at least the first uplink transmission, the first uplink transmission including at least one of a physical uplink control channel (PUCCH) signal or a sounding reference signal (SRS).

25. The UE of claim 19 , wherein the transceiver configured to transmit the one or more uplink transmissions is configured to:

transmit, to the BS, the one or more uplink transmissions during a channel occupancy time (COT) of the BS.

26. A user equipment (UE) comprising:

a transceiver configured to receive, from a base station (BS), one or more uplink grants for a plurality of uplink transmissions in a shared radio frequency band, wherein the one or more uplink grants include a first uplink grant for at least a first uplink transmission of the plurality of uplink transmissions, and wherein the first uplink grant includes a first cyclic prefix (CP) extension configuration; and

a processor configured to determine whether to apply the first CP extension configuration to the first uplink transmission based on a time location of the first uplink transmission within the plurality of uplink transmissions, wherein the determining whether to apply the first CP extension configuration to the first uplink transmission is based on the first uplink transmission being preceded by a second uplink transmission,

wherein the transceiver is further configured to transmit, to the BS in the shared radio frequency band, one or more uplink transmissions of the plurality of uplink transmissions, the first uplink transmission including a first CP extension length based on the determination.

27. The UE of claim 26 , wherein the transceiver configured to receive the one or more uplink grants is configured to:

receive, from the BS, the first uplink grant for the plurality of uplink transmissions, the first uplink grant including the first CP extension configuration for an earliest uplink transmission of the plurality of uplink transmissions.

28. The UE of claim 27 , wherein the processor configured to determine whether to apply the first CP extension configuration to the first uplink transmission is configured to:

determine to apply the first CP extension configuration to the first uplink transmission based on the first uplink transmission being after the earliest uplink transmission and adjacent to a gap duration exceeding a time threshold.

29. The UE of claim 28 , wherein the time threshold is one symbol duration.

30. The UE of claim 28 , wherein the processor is further configured to:

apply the first CP extension to the first uplink transmission, the first CP extension based on the first CP extension configuration.

31. The UE of claim 26 , wherein the transceiver configured to receive the one or more uplink grants is configured to:

receive, from the BS, a second uplink grant for the second uplink transmission of the plurality of uplink transmissions, the second uplink transmission preceding the first uplink transmission.

32. The UE of claim 26 , wherein the transceiver configured to transmit the one or more uplink transmissions is configured to:

transmit, to the BS, the one or more uplink transmissions during a channel occupancy time (COT) of the BS.

Assignments (1)

Continuity (1)

References Cited (22)