Wireless operation in unlicensed spectrum

Patent metadata

Field	Value
Publication number	US-12414096-B2
Application number	US-202217867533-A
Country	US
Kind code	B2
Filing date	Jul 18, 2022
Priority date	Dec 6, 2010
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

A base station may sense, on a cell using unlicensed spectrum, that the unlicensed spectrum is available for transmission. The base station may transmit, after sensing that the unlicensed spectrum is available, consecutive subframes. Each subframe may include a physical downlink control channel and a physical downlink shared channel.

First claim

What is claimed is:

1. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to:
receive downlink control information (DCI) comprising a trigger indication, the trigger indication indicating a time offset of a base station reference signal (RS) transmission from reception of the DCI, wherein the time offset is configured via radio resource control (RRC) signaling;
determine, based on at least the time offset indicated in the trigger indication and a time of the reception of the DCI, a time at which to measure the RS transmission;
measure the RS transmission at the determined time in response to receiving the trigger indication comprised in the DCI; and
transmit measurement information based on the measured RS transmission.

2. The WTRU of claim 1 , wherein the determined time at which to measure the RS transmission comprises a subframe offset of the RS transmission from a reception subframe of the DCI.

3. The WTRU of claim 1 , wherein the trigger indication further indicates a frequency location of the RS transmission.

4. The WTRU of claim 1 , wherein the time at which to measure the RS transmission is determined in terms of one or more of symbols and slots.

5. The WTRU of claim 1 , wherein the received DCI is for an uplink (UL) grant.

6. The WTRU of claim 1 , wherein the measurement information includes channel quality information (CQI).

7. A method implemented in a WTRU, the method comprising:
receiving downlink control information (DCI) comprising a trigger indication, the trigger indication indicating a time offset of a base station reference signal (RS) transmission from reception of the DCI, wherein the time offset is configured via radio resource control (RRC) signaling;
determining, based on at least the time offset indicated in the trigger indication and a time of the reception of the DCI, a time at which to measure the RS transmission;
measuring the RS transmission at the determined time in response to receiving the trigger indication comprised in the DCI; and
transmitting measurement information based on the measured RS transmission.

8. The method of claim 7 , wherein the determined time at which to measure the RS transmission comprises a subframe offset of the RS transmission from a reception subframe of the DCI.

9. The method of claim 7 , wherein the trigger indication further indicates a frequency location of the RS transmission.

10. The method of claim 7 , wherein the time at which to measure the RS transmission is determined in terms of one or more of symbols and slots.

11. The method of claim 7 , wherein the received DCI is for an uplink (UL) grant.

12. The method of claim 7 , wherein the measurement information includes channel quality information (CQI).

13. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to:
receive downlink control information (DCI) comprising a trigger indication, the trigger indication indicating a time of a base station reference signal (RS) transmission, wherein the indicated time of the RS transmission comprises a time offset of the RS transmission from reception of the DCI, wherein the time offset is configured via radio resource control (RRC) signaling;
measure the RS transmission at the time indicated by the trigger indication in response to receiving the trigger indication comprised in the DCI; and
transmit measurement information based on the measured RS transmission.

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Kaur Samian
• Bala Erdem
• Deng Tao
• Shah Kandarp
• Vanganuru Kiran K
• Pietraski Philip J
• Terry Stephen E
• Yang Rui
• Sternberg Gregory S
• Castor Douglas R
• Pragada Ravikumar V
• Beluri Mihaela C
• Stern-Berkowitz Janet A

Classifications

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04W72/23

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

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W24/08

  Testing, {supervising or monitoring} using real traffic · CPC title

• H04L5/0057

  Physical resource allocation for CQI · CPC title