IP Library › Granted Patent US 12,712,691
Granted Patent B2
US 12,712,691 · App. 18/286,722 · Granted Aug 18, 2026

Techniques for configuring path loss reference signals in wireless communications

Inventors: Fang Yuan (Beijing, CN); Yan Zhou (San Diego, CA); Wooseok Nam (San Diego, CA); Tao Luo (San Diego, CA)
Assignee: QUALCOMM Incorporated
H04L5/0051H04L5/0094
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Quick Facts
Patent No.
US 12,712,691
App. No.
18/286,722
Granted
Aug 18, 2026
Kind
B2
Abstract

Aspects described herein relate to communicating a configuration for a unified transmission configuration indicator (TCI) state that includes a TCI state identifier and a path loss reference signal (PLRS) identifier, communicating a PLRS associated with the PLRS identifier, and/or transmitting an uplink channel transmission associated with the PLRS and the TCI state identifier.

Claims (60)

1 . A method for wireless communication at a user equipment (UE), comprising:

receiving a configuration of at least one path loss reference signal (PLRS) list for uplink channel transmissions, wherein the at least one PLRS list indicates multiple PLRSs and associated PLRS identifiers, wherein the at least one PLRS list includes one of:

a common PLRS list indicating common PLRSs for any uplink channel transmission, or

multiple PLRS lists, each PLRS list of the multiple PLRS lists being specific to one of an uplink control channel, an uplink shared channel, or a sounding reference signal;

receiving a second configuration for a unified transmission configuration indicator (TCI) state that includes a TCI state identifier and a PLRS identifier, wherein the PLRS identifier indicates a PLRS from the at least one PLRS list;

receiving a PLRS associated with the PLRS identifier; and

transmitting an uplink channel transmission associated with the PLRS and the TCI state identifier.

2 . The method of claim 1 , wherein the uplink channel transmission corresponds to at least one of an uplink control channel, an uplink shared channel, or a sounding reference signal.

3 . The method of claim 1 , wherein the at least one PLRS list includes the common PLRS list.

4 . The method of claim 3 , wherein the common PLRS list indicates multiple PLRSs and associated PLRS identifiers including the PLRS identifier indicated in the configuration for the unified TCI state.

5 . The method of claim 3 , further comprising receiving a media access control (MAC) control element (CE) activating a subset of the common PLRS list, wherein the PLRS identifier is an index into the subset of the common PLRS list.

6 . The method of claim 1 , wherein the at least one PLRS list includes the multiple PLRS lists.

7 . The method of claim 6 , further comprising receiving a media access control (MAC)-control element (CE) activating a subset of the multiple PLRS lists, wherein the MAC-CE is common to activate a subset of each of the multiple PLRS lists, and wherein the PLRS identifier is an index into the subset of the multiple PLRS lists.

8 . The method of claim 6 , further comprising receiving a media access control (MAC)-control element (CE) activating a subset of the multiple PLRS lists, wherein the MAC-CE is one of multiple MAC-CEs for each of the multiple PLRS lists and is specific to activate the subset of the multiple PLRS lists, and wherein the PLRS identifier is an index into the subset of the multiple PLRS lists.

9 . The method of claim 1 , wherein the PLRS is one of a synchronization signal block (SSB) signal or a channel state information reference signal (CSI-RS).

10 . A method for wireless communication at a network node, comprising:

transmitting a configuration of at least one path loss reference signal (PLRS) list for uplink channel transmissions, wherein the at least one PLRS list indicates multiple PLRSs and associated PLRS identifiers, wherein the at least one PLRS list includes one of:

a common PLRS list indicating common PLRSs for any uplink channel transmission, or

multiple PLRS lists, each PLRS list of the multiple PLRS lists being specific to one of an uplink control channel, an uplink shared channel, or a sounding reference signal;

transmitting a second configuration for a unified transmission configuration indicator (TCI) state that includes a TCI state identifier and a PLRS identifier, wherein the PLRS identifier indicates a PLRS from the at least one PLRS list;

transmitting a PLRS associated with the PLRS identifier; and

receiving an uplink channel transmission associated with the PLRS and the TCI state identifier.

11 . The method of claim 10 , wherein the uplink channel transmission corresponds to at least one of an uplink control channel, an uplink shared channel, or a sounding reference signal.

12 . The method of claim 10 , wherein the at least one PLRS list includes the common PLRS list.

13 . An apparatus for wireless communication, comprising:

a transceiver;

one or more memories configured to, individually or in combination, store instructions; and

one or more processors communicatively coupled with the one or more memories, wherein the one or more processors are, individually or in combination, configured to execute the instructions to cause the apparatus to:

receive a configuration of at least one path loss reference signal (PLRS) list for uplink channel transmissions, wherein the at least one PLRS list indicates multiple PLRSs and associated PLRS identifiers, wherein the at least one PLRS list includes one of:

a common PLRS list indicating common PLRSs for any uplink channel transmission, or

multiple PLRS lists, each PLRS list of the multiple PLRS lists being specific to one of an uplink control channel, an uplink shared channel, or a sounding reference signal;

receive a second configuration for a unified transmission configuration indicator (TCI) state that includes a TCI state identifier and a PLRS identifier, wherein the PLRS identifier indicates a PLRS from the at least one PLRS list;

receive a PLRS associated with the PLRS identifier; and

transmit an uplink channel transmission associated with the PLRS and the TCI state identifier.

14 . The apparatus of claim 13 , wherein the uplink channel transmission corresponds to at least one of an uplink control channel, an uplink shared channel, or a sounding reference signal.

15 . The apparatus of claim 13 , wherein the at least one PLRS list includes the common PLRS list.

16 . The apparatus of claim 15 , wherein the common PLRS list indicates multiple PLRSs and associated PLRS identifiers including the PLRS identifier indicated in the configuration for the unified TCI state.

17 . The apparatus of claim 15 , wherein the one or more processors are, individually or in combination, configured to execute the instructions to cause the apparatus to receive a media access control (MAC) control element (CE) activating a subset of the common PLRS list, wherein the PLRS identifier is an index into the subset of the common PLRS list.

18 . The apparatus of claim 13 , wherein the at least one PLRS list includes the PLRS lists.

19 . The apparatus of claim 18 , wherein the one or more processors are, individually or in combination, configured to execute the instructions to cause the apparatus to receive a media access control (MAC)-control element (CE) activating a subset of the multiple PLRS lists, wherein the MAC-CE is common to activate a subset of each of the multiple PLRS lists, and wherein the PLRS identifier is an index into the subset of the multiple PLRS lists.

20 . The apparatus of claim 18 , wherein the one or more processors are, individually or in combination, configured to execute the instructions to cause the apparatus to receive a media access control (MAC)-control element (CE) activating a subset of the multiple PLRS lists, wherein the MAC-CE is one of multiple MAC-CEs for each of the multiple PLRS lists and is specific to activate the subset of the multiple PLRS lists, and wherein the PLRS identifier is an index into the subset of the multiple PLRS lists.

21 . The apparatus of claim 13 , wherein the PLRS is one of a synchronization signal block (SSB) signal or a channel state information reference signal (CSI-RS).

22 . An apparatus for wireless communication, comprising:

a transceiver;

one or more memories configured to, individually or in combination, store instructions; and

one or more processors communicatively coupled with the one or more memories, wherein the one or more processors are, individually or in combination, configured to execute the instructions to cause the apparatus to:

transmit a configuration of at least one path loss reference signal (PLRS) list for uplink channel transmissions, wherein the at least one PLRS list indicates multiple PLRSs and associated PLRS identifiers, wherein the at least one PLRS list includes one of:

a common PLRS list indicating common PLRSs for any uplink channel transmission, or

multiple PLRS lists, each PLRS list of the multiple PLRS lists being specific to one of an uplink control channel, an uplink shared channel, or a sounding reference signal;

transmit a second configuration for a unified transmission configuration indicator (TCI) state that includes a TCI state identifier and a PLRS identifier, wherein the PLRS identifier indicates a PLRS from the at least one PLRS list;

transmit a PLRS associated with the PLRS identifier; and

receive an uplink channel transmission associated with the PLRS and the TCI state identifier.

23 . The apparatus of claim 22 , wherein the uplink channel transmission corresponds to at least one of an uplink control channel, an uplink shared channel, or a sounding reference signal.

24 . The apparatus of claim 22 , wherein the at least one PLRS list includes the common PLRS list.

25 . The apparatus of claim 24 , wherein the common PLRS list indicates multiple PLRSs and associated PLRS identifiers including the PLRS identifier indicated in the configuration for the unified TCI state.

26 . The apparatus of claim 24 , wherein the one or more processors are, individually or in combination, configured to execute the instructions to cause the apparatus to transmit a media access control (MAC) control element (CE) activating a subset of the common PLRS list, wherein the PLRS identifier is an index into the subset of the common PLRS list.

27 . The apparatus of claim 22 , wherein the at least one PLRS list includes the multiple PLRS lists.

28 . The apparatus of claim 27 , wherein the one or more processors are, individually or in combination, configured to execute the instructions to cause the apparatus to transmit a media access control (MAC)-control element (CE) activating a subset of the multiple PLRS lists, wherein the MAC-CE is common to activate a subset of each of the multiple PLRS lists, and wherein the PLRS identifier is an index into the subset of the multiple PLRS lists.

29 . The apparatus of claim 27 , wherein the one or more processors are, individually or in combination, configured to execute the instructions to cause the apparatus to transmit a media access control (MAC)-control element (CE) activating a subset of the multiple PLRS lists, wherein the MAC-CE is one of multiple MAC-CEs for each of the multiple PLRS lists and is specific to activate the subset of the multiple PLRS lists, and wherein the PLRS identifier is an index into the subset of the multiple PLRS lists.

30 . The apparatus of claim 22 , wherein the PLRS is one of a synchronization signal block (SSB) signal or a channel state information reference signal (CSI-RS).