Channelization and BWP

Patent metadata

Field	Value
Publication number	US-12284675-B2
Application number	US-202418438372-A
Country	US
Kind code	B2
Filing date	Feb 9, 2024
Priority date	May 10, 2018
Publication date	Apr 22, 2025
Grant date	Apr 22, 2025

Abstract

Methods, systems, and apparatus designed to support flexible carrier bandwidths in new radio. Multiple carrier bands may be combined into a single composite carrier depending on channel availability in the carrier bands. A composite carrier indicator (CCI) indicates to network devices, the available carrier bands within the channel occupancy time. In addition, bandwidth part inactivity time is suspended when channel access is not available.

First claim

What is claimed:

1. A wireless transmit/receive unit (WTRU) comprising a processor and memory, the processor and memory configured to:
receive, from a network node, a composite carrier indicator (CCI), wherein the CCI is communicated via downlink control information (DCI) of a physical downlink control channel (PDCCH) transmission via a common search space, wherein the CCI is for identification of a plurality of frequency bands that are available in an unlicensed carrier, and the DCI indicates a channel occupancy time associated with the plurality of frequency bands that are identified as available in the unlicensed carrier;
determine that an uplink transmission is comprised within the plurality of frequency bands that are identified as available in the unlicensed carrier and that the uplink transmission occurs within the channel occupancy time indicated by the DCI;
determine that at least one guard band is available for the uplink transmission based at least on determining that the guard band is between the plurality of frequency bands used for the uplink transmission;
based on determining that that the uplink grant comprised within the plurality of frequency bands that are identified as available in the unlicensed carrier occurs within the channel occupancy time indicated by the DCI, determine to switch from a first type of listen before talk (LBT) procedure to a second type LBT procedure for the uplink transmission;
determine that the second type of LBT procedure is successful for the uplink transmission comprised within the plurality of frequency bands that are identified as available in the unlicensed carrier occurring within the channel occupancy time indicated by the DCI; and
send the uplink transmission based on the second type of LBT being successful.

2. The WTRU of claim 1 , wherein the plurality of frequency bands comprise a first frequency band and a second frequency band, the first and second frequency bands being separated by the guard band.

3. The WTRU of claim 2 , wherein the first frequency band is adjacent to the second frequency band of the plurality of frequency bands.

4. The WTRU of claim 1 , wherein each of the plurality of frequency bands are associated with the same maximum channel occupancy time (MCOT).

5. The WTRU of claim 1 , wherein the plurality of frequency bands correspond to a composite carrier.

6. The WTRU of claim 1 , wherein the plurality of frequency bands correspond to frequency resources that are separated a plurality of guard bands.

7. A method implemented by a wireless transmit receive unit (WTRU), the method comprising:
receiving, from a network node, a composite carrier indicator (CCI), wherein the CCI is communicated via downlink control information (DCI) of a physical downlink control channel (PDCCH) transmission via a common search space, wherein the CCI is for identification of a plurality of frequency bands that are available in an unlicensed carrier, and the DCI indicates a channel occupancy time associated with the plurality of frequency bands that are identified as available in the unlicensed carrier;
determining that an uplink transmission is comprised within the plurality of frequency bands that are identified as available in the unlicensed carrier and that the uplink transmission occurs within the channel occupancy time indicated by the DCI;
determining that at least one guard band is available for the uplink transmission based at least on determining that the guard band is between the plurality of frequency bands used for the uplink transmission;
based on determining that that the uplink grant comprised within the plurality of frequency bands that are identified as available in the unlicensed carrier occurs within the channel occupancy time indicated by the DCI, determining to switch from a first type of listen before talk (LBT) procedure to a second type LBT procedure for the uplink transmission;
determining that the second type of LBT procedure is successful for the uplink transmission comprised within the plurality of frequency bands that are identified as available in the unlicensed carrier occurring within the channel occupancy time indicated by the DCI; and
sending the uplink transmission based on the LBT being successful.

8. The method of claim 7 , wherein the plurality of frequency bands comprise a first frequency band and a second frequency band, the first and second frequency bands being separated by the guard band.

9. The method of claim 8 , wherein the first frequency band is adjacent to the second frequency band of the plurality of frequency bands.

10. The method of claim 7 , wherein each of the plurality of frequency bands are associated with the same maximum channel occupancy time (MCOT).

11. The method of claim 7 , wherein the plurality of frequency bands correspond to a composite carrier.

12. The method of claim 7 , wherein the plurality of frequency bands correspond to frequency resources that are separated a plurality of guard bands.

13. The method of claim 7 , wherein sending the uplink transmission comprises sending the uplink transmission via at least one resource corresponding to the guard band.

14. The method of claim 7 , wherein the PDCCH transmission corresponds to a group common PDCCH transmission received using radio network temporary identifier received via higher layer signaling.

15. The method of claim 7 , further comprising:
determining that traffic of a specified priority is available for transmission;
determining that a first configured grant or a plurality of configured grants is configured for transmission of traffic of the specified priority;
determining whether a physical uplink shared channel (PUSCH) transmission corresponding to the configured grants is within the plurality of frequency bands that are identified as available in the unlicensed carrier and that the PUSCH transmission corresponding to the configured grant occurs within the channel occupancy time indicated by the DCI;
on condition that the PUSCH transmission corresponding to the configured grants is not within the plurality of frequency bands that are identified as available in the unlicensed carrier or that the PUSCH transmission corresponding to the configured grant does not occur within the channel occupancy time indicated by the DCI, performing the first type of LBT procedure for the PUSCH transmission corresponding to the configured grant; and
on condition that the PUSCH transmission corresponding to the configured grants is within the plurality of frequency bands that are identified as available in the unlicensed carrier and that the PUSCH transmission corresponding to the configured grant occurs within the channel occupancy time indicated by the DCI, performing the second type of LBT procedure for the PUSCH transmission corresponding to the configured grant.

16. The method of claim 7 , wherein the first type of LBT procedure corresponds to a category four (CAT4) LBT procedure, and the second type of LBT procedure corresponds to a category two (CAT2) LBT procedure.

17. The WTRU of claim 1 , wherein the processor and memory being configured to send the uplink transmission comprises the processor and memory being configured to send the uplink transmission via at least one resource corresponding to the guard band.

18. The WTRU of claim 1 , wherein the PDCCH transmission corresponds to a group common PDCCH transmission received using radio network temporary identifier received via higher layer signaling.

19. The WTRU of claim 1 , wherein the processor and memory are confi

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Iyer Lakshmi R
• Zhang Guodong
• Murray Joseph M
• Li Qing
• Tsai Allan Y
• Adjakple Pascal M
• Awadin Mohamed

Classifications

• H04W72/232

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

• H04W72/0457 Primary

  Variable allocation of band or rate · CPC title

• H04W74/0808 Primary

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

• H04L5/0092

  Indication of how the channel is divided · CPC title

• H04W72/23

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