Beam indication based on tci state group

Patent metadata

Field	Value
Publication number	US-2023216565-A1
Application number	US-202118019593-A
Country	US
Kind code	A1
Filing date	Jul 30, 2021
Priority date	Aug 5, 2020
Publication date	Jul 6, 2023
Grant date	—

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

1 - 12 . (canceled)

13 . 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 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 and the second TCI state is associated with a second 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;
report the first downlink power value, the first power reduction value, the second downlink power value, and the second 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; and
send the uplink transmission based on the first TCI state.

14 . The WTRU of claim 13 , wherein the first TCI group further comprises a third TCI state associated with a third downlink reference signal, and wherein the processor is further configured to:
measure a third downlink power value and a third power reduction value that are associated with the third downlink reference signal; and report the third downlink power value and the third power reduction value.

15 . The WTRU of claim 14 , 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 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.

16 . The WTRU of claim 15 , 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.

17 . The WTRU of claim 13 , 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.

18 . The WTRU of claim 13 , wherein the downlink transmission is a downlink control information (DCI) transmission, and wherein the uplink transmission is a physical uplink shared channel (PUSCH) transmission.

19 . 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 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 and the second TCI state is associated with a second 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; reporting the first downlink power value, the first power reduction value, the second downlink power value, and the second 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; and sending the uplink transmission based on the first TCI state.

20 . The method of claim 19 , wherein the first TCI group further comprises a third TCI state associated with a third downlink reference signal, further comprising:
measuring a third downlink power value and a third power reduction value that are associated with the third downlink reference signal; and reporting the third downlink power value and the third power reduction value.

21 . The method of claim 20 , wherein the method 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 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.

22 . The method of claim 21 , 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.

23 . The method of claim 19 , 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.

24 . The method of claim 19 , wherein the downlink transmission is a downlink control information (DCI) transmission, and wherein the uplink transmission is a physical uplink shared channel (PUSCH) transmission.

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

• H04B7/0696 Primary

  Determining beam pairs · CPC title

• H04B7/0623 Primary

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

• H04B7/0632

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

• H04B7/088

  using beam selection · CPC title