IP Library › Granted Patent US 12,356,456
Granted Patent B2
US 12,356,456 · App. 18/524,047 · Granted Jul 8, 2025

Sub-band operations in unlicensed spectrums of new radio

Inventors: Mohamed Awadin (San Diego, CA); Lakshmi R. Iyer (King of Prussia, PA); Qing Li (Princeton Junction, NJ); Pascal M. Adjakple (Great Neck, NY); Joseph M. Murray (Schwenksville, PA); Yifan Li (Conshohocken, PA); Guodong Zhang (Woodbury, NY)
Assignee: InterDigital Patent Holdings, Inc.
H04W74/0816H04W74/006H04W74/0841H04W74/0866
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Quick Facts
Patent No.
US 12,356,456
App. No.
18/524,047
Granted
Jul 8, 2025
Kind
B2
Abstract

Sub-band (SB) indications and listen-before-talk (LBT) outcomes may be used to adjust communications between devices such as wireless terminals and base stations. For example, a wireless terminal may receive SB indications including SB configurations and/or LBT outcomes of a base station, and other information such as a remapped CORESET. Similarly, a terminal may determine that a physical resource block (PRB) is invalid based at least in part on whether the PRB overlaps with a guard band. The terminal may be arranged to adjust its searches and transmissions based on received SB indications, and to provide the base station with LBT outcomes of the terminal.

Claims (32)

1. A wireless transmit/receive unit (WTRU) comprising a processor configured to:

receive higher layer signaling comprising guard band information, the guard band information indicating a start of a guard band and a number of resource blocks associated with the guard band;

receive downlink control information (DCI), the DCI comprising a bitmap, the bitmap indicating one or more sub-bands that a base station has determined are unavailable, wherein each bit in the bitmap indicates an availability status of a respective sub-band; and

cancel reception of at least one channel state information reference signal (CSI-RS) configured within the one or more sub-bands indicated as unavailable by the DCI.

2. The WTRU of claim 1 , wherein the DCI further comprises channel occupancy time information.

3. The WTRU of claim 1 , wherein the higher layer signaling corresponds to radio resource control (RRC) signaling.

4. The WTRU of claim 1 , wherein the processor being configured cancel reception of the at least one CSI-RS comprises the processor being configured determine that the base station will not transmit the at least one CSI-RS.

5. The WTRU of claim 1 , wherein the downlink control information is received in a physical downlink control channel (PDCCH) transmission.

6. The WTRU of claim 5 , wherein the PDCCH transmission is received via a common search space.

7. The WTRU of claim 5 , wherein the PDCCH is received via group common radio network temporary identifier.

8. The WTRU of claim 1 , wherein the processor is configured to:

transmit a random access preamble;

receive a random access response (RAR), wherein the RAR wherein the RAR indicates a type of channel access procedure to be performed by the WTRU for transmission of random access message 3 (msg3).

9. The WTRU of claim 1 , wherein the processor is configured to:

determine to receive at least a second CSI-RS configured within at least one sub-band indicated as available by the DCI.

10. The WTRU of claim 1 , wherein the guard band is located at an edge of at least one of the one or more sub-bands.

11. A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:

receiving higher layer signaling comprising guard band information, the guard band information indicating a start of a guard band and a number of resource blocks associated with the guard band;

receiving downlink control information (DCI), the DCI comprising a bitmap, the bitmap indicating one or more sub-bands that a base station has determined are unavailable, wherein each bit in the bitmap indicates an availability status of a respective sub-band; and

cancelling reception of at least one channel state information reference signal (CSI-RS) configured within the one or more sub-bands indicated as unavailable by the DCI.

12. The method of claim 11 , wherein the DCI further comprises channel occupancy time information.

13. The method of claim 11 , wherein the higher layer signaling corresponds to radio resource control (RRC) signaling.

14. The method of claim 11 , wherein cancelling reception of the at least one CSI-RS comprises determining that the base station will not transmit the at least one CSI-RS.

15. The method of claim 11 , wherein the downlink control information is received in a physical downlink control channel (PDCCH) transmission.

16. The method of claim 15 , wherein the PDCCH transmission is received via a common search space.

17. The method of claim 15 , wherein the PDCCH is received via group common radio network temporary identifier.

18. The method of claim 11 , further comprising:

transmitting a random access preamble;

receiving a random access response (RAR), wherein the RAR wherein the RAR indicates a type of channel access procedure to be performed by the WTRU for transmission of random access message 3 (msg3).

19. The method of claim 11 , further comprising:

determining to receive at least a second CSI-RS configured within at least one sub-band indicated as available by the DCI.

20. The method of claim 11 , wherein the guard band is located at an edge of at least one of the one or more sub-bands.

Continuity (4)
Continuation 17275702
Provisional Application 62754159 · Nov 1, 2018
Provisional Application 62737380 · Sep 27, 2018
Related Publication 20240196437A1 · Jun 13, 2024
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