# US 11,445,447 B2 · Techniques for activating a pathloss reference signal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,447 B2 - Document ID: US11445447B2 - Status: Granted - Kind: B2 - Application number: 16/949,031 - Filed: 2020-10-09 - Published: 2021-06-24 - Granted: 2022-09-13 - Earliest claimed: 2019-12-18 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Kiran Venugopal; Yan Zhou; Tao Luo; Tianyang Bai; Junyi Li - Web page: https://patentgrep.com/patent/US11445447B2 ## CPC - H04W 52/04: Transmission power control [TPC] - H04W 52/146: {Uplink power control} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 27/261: {Details of reference signals} - H04W 52/16: Deriving transmission power values from another channel - H04W 52/242: {taking into account path loss} - H04W 52/32: TPC of broadcast or control channels - H04W 52/325: {Power control of control or pilot channels} - H04L 25/0226: {sounding signals per se} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of an uplink transmission configuration indication (TCI) state. The UE may determine that the uplink TCI state identifies a pathloss reference signal for an associated uplink transmission. The UE may determine an uplink power control parameter for the uplink transmission based at least in part on the pathloss reference signal. Numerous other aspects are provided. ## Claims ### Claim 1 A method of wireless communication performed by a user equipment (UE), comprising: receiving an indication of an uplink transmission configuration indication (TCI) state in a downlink control information communication, wherein the indication of the uplink TCI state includes an indication of one or more types of uplink quasi-co-location (QCL) relationships; identifying that the uplink TCI state includes an indication of a pathloss reference signal for an associated uplink transmission; and identifying an uplink power control parameter for the associated uplink transmission based at least in part on the pathloss reference signal. ### Claim 2 (depends on 1) The method of claim 1, further comprising: performing the associated uplink transmission using the uplink power control parameter. ### Claim 3 (depends on 1) The method of claim 1, further comprising: performing the associated uplink transmission in: a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or resource set. ### Claim 4 (depends on 1) The method of claim 1, further comprising: receiving an indication of another uplink TCI state; determining that the other uplink TCI state does not identify another pathloss reference signal; and identifying the other pathloss reference signal based at least in part on at least one of: a radio resource control communication, a medium access control element communication, or another downlink control information communication. ### Claim 5 (depends on 1) The method of claim 1, wherein identifying that the uplink TCI state includes the indication of the pathloss reference signal comprises: identifying, in the downlink control information communication, a field configured to indicate whether the uplink TCI state identifies the pathloss reference signal; and identifying that the uplink TCI state includes the indication of the pathloss reference signal based at least in part on the field. ### Claim 6 (depends on 1) The method of claim 1, wherein identifying that the uplink TCI state includes the indication of the pathloss reference signal comprises: identifying that the uplink TCI state includes the indication of the pathloss reference signal based at least in part on the associated uplink transmission being scheduled. ### Claim 7 (depends on 1) The method of claim 1, further comprising: receiving an indication that the uplink TCI state identifies an updated pathloss reference signal that is different from the pathloss reference signal, wherein the indication that the uplink TCI state identifies the updated pathloss reference signal is received in a different downlink communication from the downlink control information communication. ### Claim 8 A method of wireless communication performed by a network entity, comprising: transmitting an indication of an uplink transmission configuration indication (TCI) state in a downlink control information communication, wherein the indication of the uplink TCI state includes an indication of one or more types of uplink quasi-co-location (QCL) relationships; and transmitting an associated pathloss reference signal based at least in part on the uplink TCI state, wherein the uplink TCI state includes an indication of the associated pathloss reference signal. ### Claim 9 (depends on 8) The method of claim 8, further comprising: receiving an uplink transmission, that is based at least in part on the associated pathloss reference signal, in: a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or resource set. ### Claim 10 (depends on 8) The method of claim 8, further comprising: transmitting the indication of the associated pathloss reference signal in at least one of: a radio resource control communication, a medium access control element communication, or another downlink control information communication. ### Claim 11 (depends on 8) The method of claim 8, wherein the associated pathloss reference signal is updated based at least in part on an associated uplink transmission. ### Claim 12 (depends on 8) The method of claim 8, wherein the downlink control information communication includes a field configured to indicate whether the uplink TCI state identifies the associated pathloss reference signal. ### Claim 13 (depends on 8) The method of claim 8, wherein transmitting the indication of the uplink TCI state comprises: determining to update a pathloss reference signal for an associated uplink transmission; and transmitting the indication of the uplink TCI state based at least in part on the determination. ### Claim 14 (depends on 8) The method of claim 8, further comprising: determining to update the associated pathloss reference signal for an associated uplink transmission; and transmitting, based at least in part on the determination, an indication of an updated pathloss reference signal in a different downlink communication from the downlink control information communication. ### Claim 15 A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to: receive an indication of an uplink transmission configuration indication (TCI) state in a downlink control information communication, wherein the indication of the uplink TCI state includes an indication of one or more types of uplink quasi-co-location (QCL) relationships; identify that the uplink TCI state includes an indication of a pathloss reference signal for an associated uplink transmission; and identify an uplink power control parameter for the associated uplink transmission based at least in part on the pathloss reference signal. ### Claim 16 (depends on 15) The UE of claim 15, wherein the one or more processors are further configured to: perform the associated uplink transmission using the uplink power control parameter. ### Claim 17 (depends on 15) The UE of claim 15, wherein the one or more processors are further configured to: perform the associated uplink transmission in: a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or resource set. ### Claim 18 (depends on 15) The UE of claim 15, wherein the one or more processors, when identifying that the uplink TCI state includes the indication of the pathloss reference signal, are configured to: identify, in the downlink control information communication, a field configured to indicate whether the uplink TCI state identifies the pathloss reference signal; and identify that the uplink TCI state includes the indication of the pathloss reference signal based at least in part on the field. ### Claim 19 (depends on 15) The UE of claim 15, wherein the one or more processors are further configured to: receive an indication that the uplink TCI state identifies an updated pathloss reference signal that is different from the pathloss reference signal, wherein the indication that the uplink TCI state identifies the updated pathloss reference signal is received in a different downlink communication from the downlink control information communication. ### Claim 20 (depends on 15) The UE of claim 15, wherein the one or more processors are further configured to: receive an indication of another uplink TCI state; determine that the other uplink TCI state does not identify another pathloss reference signal; and identify the other pathloss reference signal based at least in part on at least one of: a radio resource control communication, a medium access control element communication, or another downlink control information communication. ### Claim 21 (depends on 15) The UE of claim 15, wherein the one or more processors, when identifying that the uplink TCI state includes the indication of the pathloss reference signal, are configured to: identify that the uplink TCI state includes the indication of the pathloss reference signal based at least in part on the associated uplink transmission being scheduled. ### Claim 22 A network entity for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to: transmit an indication of an uplink transmission configuration indication (TCI) state in a downlink control information communication, wherein the indication of the uplink TCI state includes an indication of one or more types of uplink quasi-co-location (QCL) relationships; and transmit an associated pathloss reference signal based at least in part on the uplink TCI state, wherein the uplink TCI state includes an indication of the associated pathloss reference signal. ### Claim 23 (depends on 22) The network entity of claim 22, wherein the one or more processors are further configured to: receive an uplink transmission, that is based at least in part on the associated pathloss reference signal, in: a physical uplink control channel resource, a physical uplink shared channel resource, a physical random access channel resource, or a sounding reference signal resource or resource set. ### Claim 24 (depends on 22) The network entity of claim 22, wherein the downlink control information communication includes a field configured to indicate whether the uplink TCI state identifies the associated pathloss reference signal. ### Claim 25 (depends on 22) The network entity of claim 22, wherein the one or more processors, when transmitting the indication of the uplink TCI state, are configured to: determine to update a pathloss reference signal for an associated uplink transmission; and transmit the indication of the uplink TCI state based at least in part on the determination. ### Claim 26 (depends on 22) The network entity of claim 22, wherein the one or more processors are further configured to: determine to update the associated pathloss reference signal for an associated uplink transmission; and transmit, based at least in part on the determination, an indication of an updated pathloss reference signal in a different downlink communication from the downlink control information communication. ### Claim 27 (depends on 22) The network entity of claim 22, wherein the one or more processors are further configured to: transmit the indication of the associated pathloss reference signal in at least one of: a radio resource control communication, a medium access control element communication, or another downlink control information communication. ### Claim 28 (depends on 22) The network entity of claim 22, wherein the associated pathloss reference signal is updated based at least in part on an associated uplink transmission.