Beam indication based on TCI state group

Patent metadata

Field	Value
Publication number	US-12470280-B2
Application number	US-202118019593-A
Country	US
Kind code	B2
Filing date	Jul 30, 2021
Priority date	Aug 5, 2020
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A wireless transmit/receive unit (WTRU) may be configured to receive configuration information associated with a first transmission configuration indicator (TCI) state group and a second TCI state group. The WTRU may be configured to report first respective measured downlink received power values and first respective determined power reduction values. The WTRU may be configured to report second respective measured downlink received power values and second respective determined power reduction values. The WTRU may be configured to receive an indication of the first TCI state group via a downlink transmission. The WTRU may be configured to determine a first TCI state from the first TCI state group based on downlink received power information and power reduction information. The WTRU may be configured to send an uplink transmission based on the first determined TCI state.

First claim

What is claimed:

1 . A wireless transmit-receive unit (WTRU), comprising:
a processor configured to:
receive configuration information that indicates a first transmission configuration indicator (TCI) state group and a second TCI state group, wherein the first TCI state group comprises at least a first TCI state and a third TCI state and the second TCI state group comprises at least a second TCI state, and wherein the first TCI state is associated with a first downlink reference signal, the second TCI state is associated with a second downlink reference signal, and the third TCI state is associated with a third downlink reference signal;
measure a first downlink power value and a first power reduction value that are associated with the first downlink reference signal;
measure a second downlink power value and a second power reduction value that are associated with the second downlink reference signal;
measure a third downlink power value and a third power reduction value that are associated with the third downlink reference signal;
report the first downlink power value, the first power reduction value, the second downlink power value, and the second power reduction value;
report the third downlink power value and the third power reduction value;
receive, via a downlink transmission, an indication to use the first TCI state group for an uplink transmission, wherein the downlink transmission comprises scheduling information for the uplink transmission;
determine the first TCI state from the first TCI state group based at least on the first downlink power value and the first power reduction value, wherein the processor being configured to determine the first TCI state from the first TCI state group based at least on the first downlink power value and the first power reduction value comprises the processor being further configured to:
compare the first downlink power value and first power reduction value with the third downlink power value and third power reduction value in response to receiving the indication of the first TCI state group, and
determine the first TCI state from the first TCI group based on a comparison of the first downlink power value and first power reduction value with the third downlink power value and the third power reduction value; and

send the uplink transmission based on the first TCI state.

2 . The WTRU of claim 1 , wherein the processor being configured to determine the first TCI state from the first TCI group based on the comparison of the first downlink power value and first power reduction value with the third downlink power value and the third power reduction value comprises the processor being further configured to:
adjust the first downlink power value based on the first power reduction value and the third downlink power value based on the third power reduction value; and determine the first TCI state from the first TCI group based on the adjusted first downlink power value being greater than the adjusted third downlink power value.

3 . The WTRU of claim 1 , wherein the first downlink power value is a downlink reference signal received power (RSRP) value, and wherein the first power reduction value is a power-management maximum power reduction (PMPR) value.

4 . The WTRU of claim 1 , wherein the downlink transmission is a downlink control information (DCI) transmission, and wherein the uplink transmission is a physical uplink shared channel (PUSCH) transmission.

5 . A method implemented in a wireless transmit-receive unit (WTRU), comprising:
receiving configuration information that indicates a first transmission configuration indicator (TCI) state group and a second TCI state group, wherein the first TCI state group comprises at least a first TCI state and a third TCI state and the second TCI state group comprises at least a second TCI state, and wherein the first TCI state is associated with a first downlink reference signal, the second TCI state is associated with a second downlink reference signal, and the third TCI state is associated with a third downlink reference signal; measuring a first downlink power value and a first power reduction value that are associated with the first downlink reference signal; measuring a second downlink power value and a second power reduction value that are associated with the second downlink reference signal; measuring a third downlink power value and a third power reduction value that are associated with the third downlink reference signal; reporting the first downlink power value, the first power reduction value, the second downlink power value, and the second power reduction value; reporting the third downlink power value and the third power reduction value; receiving, via a downlink transmission, an indication to use the first TCI state group for an uplink transmission, wherein the downlink transmission comprises scheduling information for the uplink transmission; determining the first TCI state from the first TCI state group based at least on the first downlink power value and the first power reduction value, wherein determining the first TCI state from the first TCI state group based at least on the first downlink power value and the first power reduction value further comprises:
comparing the first downlink power value and first power reduction value with the third downlink power value and third power reduction value in response to receiving the indication of the first TCI state group, and
determining the first TCI state from the first TCI group based on a comparison of the first downlink power value and first power reduction value with the third downlink power value and the third power reduction value; and
sending the uplink transmission based on the first TCI state.

6 . The method of claim 5 , wherein the method determining the first TCI state from the first TCI group based on the comparison of the first downlink power value and first power reduction value with the third downlink power value and the third power reduction value further comprises:
adjusting the first downlink power value based on the first power reduction value and the third downlink power value based on the third power reduction value; and determining the first TCI state from the first TCI group based on the adjusted first downlink power value being greater than the adjusted third downlink power value.

7 . The method of claim 5 , wherein the first downlink power value is a downlink reference signal received power (RSRP) value, and wherein the first power reduction value is a power-management maximum power reduction (PMPR) value.

8 . The method of claim 5 , wherein the downlink transmission is a downlink control information (DCI) transmission, and wherein the uplink transmission is a physical uplink shared channel (PUSCH) transmission.

9 . A wireless transmit/receive unit (WTRU), comprising:
a processor configured to:
receive configuration information, wherein the configuration information indicates a first control resource set (CORESET) and a second CORESET;
receive information, via a medium access control (MAC) control element (CE), that indicates a first set of transmission configuration index (TCI) states and a second set of TCI states, wherein each of the first and second sets of TCI states comprises a respective first TCI state and a respective second TCI state;
receive downlink control information (DCI) that indicates one of: the first set of TCI states or the second set of TCI states; and
receive physical downlink control channel (PDCCH) signaling using one of the first CORESET or the second CORESET and one of the TCI states in the set of TCI states indicated in the DCI.

10 . The WTRU of claim 9 , wherein, based o

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Kwak Young Woo
• Lee Moon-Il
• Marinier Paul
• Comsa Virgil
• Haghighat Afshin
• Herath Prasanna

Classifications

• H04B7/0695

  using beam selection · CPC title

• H04B7/088

  using beam selection · CPC title

• H04B7/0632

  Channel quality parameters, e.g. channel quality indicator [CQI] · CPC title

• H04B7/0623 Primary

  Auxiliary parameters, e.g. power control [PCB] or not acknowledged commands [NACK], used as feedback information · CPC title

• H04W72/23

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