# US 11,452,089 B2 · Signaling to activate uplink trigger states > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,089 B2 - Document ID: US11452089B2 - Status: Granted - Kind: B2 - Application number: 17/118,533 - Filed: 2020-12-10 - Published: 2021-06-24 - Granted: 2022-09-20 - Earliest claimed: 2019-12-23 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Kiran Venugopal; Yan Zhou; Tianyang Bai; Tao Luo; Junyi Li - Web page: https://patentgrep.com/patent/US11452089B2 ## CPC - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - 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 5/0096: {Indication of changes in allocation} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04W 72/20: Control channels or signalling for resource management - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A configuration to configure a UE to activate a subset of configured SRS trigger states. The apparatus receives a configuration activating a subset of configured SRS trigger states. The apparatus receives DCI in a PDCCH triggering an aperiodic SRS transmission based on one or more SRS trigger states of activated SRS trigger states. The apparatus determines an aperiodic SRS resource set based on the configuration and the DCI indicating the one or more SRS trigger states. The apparatus transmits aperiodic SRS within the aperiodic SRS resource set. ## Claims ### Claim 1 A method of wireless communication at a user equipment (UE), comprising: receiving a configuration activating a subset of configured sounding reference signal (SRS) trigger states; receiving downlink control information (DCI) in a physical downlink control channel (PDCCH) triggering an aperiodic SRS transmission based on one or more SRS trigger states of activated SRS trigger states, wherein the DCI includes one or more codepoint values indicating the one or more SRS trigger states of the activated SRS trigger states; receiving a mapping between the activated SRS trigger states and a set of codepoint values, the one or more codepoint values being within the set of codepoint values; determining an aperiodic SRS resource set based on the configuration and the DCI indicating the one or more SRS trigger states; and transmitting aperiodic SRS within the aperiodic SRS resource set. ### Claim 2 (depends on 1) The method of claim 1, wherein the configuration is received through a medium access control (MAC) control element (CE) (MAC-CE). ### Claim 3 (depends on 1) The method of claim 1, wherein each of the activated SRS trigger states is associated with at least one of time-frequency resources, a timing behavior, or a transmission control indicator (TCI) state for transmitting the aperiodic SRS, and wherein the aperiodic SRS is transmitted based on the at least one of the time-frequency resources, the timing behavior, or the TCI state associated with the one or more SRS trigger states. ### Claim 4 A method of wireless communication at a user equipment (UE), comprising: receiving a configuration activating a subset of configured sounding reference signal (SRS) trigger states; receiving downlink control information (DCI) in a physical downlink control channel (PDCCH) triggering an aperiodic SRS transmission based on one or more SRS trigger states of activated SRS trigger states; determining an aperiodic SRS resource set based on the configuration and the DCI indicating the one or more SRS trigger states; and transmitting aperiodic SRS within the aperiodic SRS resource set, wherein each of the activated SRS trigger states is associated with a transmission control indicator (TCI) state for transmitting the aperiodic SRS, and wherein the transmitting the aperiodic SRS comprises transmitting the aperiodic SRS with a quasi-co location (QCL) property similar as a reference signal associated with the one or more SRS trigger states. ### Claim 5 (depends on 4) The method of claim 4, wherein the reference signal is further associated with a panel identifier (ID) of the UE. ### Claim 6 (depends on 4) The method of claim 4, wherein the QCL property comprises at least one of a one or more port indications, a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial transmit (Tx) parameter, or a spatial receive (Rx) parameter. ### Claim 7 (depends on 4) The method of claim 4, wherein the reference signal is one of sounding reference signals (SRS), or a downlink (DL) reference signal (RS). ### Claim 8 (depends on 7) The method of claim 7, wherein the DL RS is one of channel state information (CSI) RS (CSI-RS), demodulation RS (DM-RS) for at least one of a physical downlink shared channel (PDSCH) or the PDCCH, or a synchronization signal/physical broadcast channel (PBCH) (SS/PBCH) block. ### Claim 9 An apparatus for wireless communication at a user equipment (UE), comprising: a memory; and at least one processor coupled to the memory and configured to: receive a configuration activating a subset of configured sounding reference signal (SRS) trigger states; receive downlink control information (DCI) in a physical downlink control channel (PDCCH) triggering an aperiodic SRS transmission based on one or more SRS trigger states of activated SRS trigger states, wherein the DCI includes one or more codepoint values indicating the one or more SRS trigger states of the activated SRS trigger states; receive a mapping between the activated SRS trigger states and a set of codepoint values, the one or more codepoint values being within the set of codepoint values; determine an aperiodic SRS resource set based on the configuration and the DCI indicating the one or more SRS trigger states; and transmit aperiodic SRS within the aperiodic SRS resource set. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein each of the activated SRS trigger states is associated with at least one of time-frequency resources, a timing behavior, or a transmission control indicator (TCI) state for transmitting the aperiodic SRS, and wherein the aperiodic SRS is transmitted based on the at least one of the time-frequency resources, the timing behavior, or the TCI state associated with the one or more SRS trigger states. ### Claim 11 (depends on 9) The apparatus of claim 9, wherein each of the activated SRS trigger states is associated with a transmission control indicator (TCI) state for transmitting the aperiodic SRS, and wherein the at least one processor is further configured to: transmit the aperiodic SRS is further configured to transmit the aperiodic SRS with a quasi-co location (QCL) property similar as a reference signal associated with the one or more SRS trigger states. ### Claim 12 A method of wireless communication of a base station (BS), comprising: transmitting, to a user equipment (UE), a configuration activating a subset of configured sounding reference signal (SRS) trigger states; transmitting, to the UE, downlink control information (DCI) in a physical downlink control channel (PDCCH) triggering an aperiodic SRS transmission based on one or more SRS trigger states of activated SRS trigger states, wherein the DCI includes one or more codepoint values indicating the one or more SRS trigger states of the activated SRS trigger states; transmitting a mapping between the activated SRS trigger states and a set of codepoint values, the one or more codepoint values being within the set of codepoint values; and receiving, from the UE, aperiodic SRS in an aperiodic SRS resource set based on the DCI. ### Claim 13 (depends on 12) The method of claim 12, wherein the configuration is transmitted through a medium access control (MAC) control element (CE) (MAC-CE). ### Claim 14 (depends on 12) The method of claim 12, wherein each of the activated SRS trigger states is associated with at least one of time-frequency resources, a timing behavior, or a transmission control indicator (TCI) state for transmitting the aperiodic SRS by the UE, and wherein the aperiodic SRS is received based on the at least one of the time-frequency resources, the timing behavior, or the TCI state associated with the one or more SRS trigger states. ### Claim 15 A method of wireless communication of a base station (BS), comprising: transmitting, to a user equipment (UE), a configuration activating a subset of configured sounding reference signal (SRS) trigger states; transmitting, to the UE, downlink control information (DCI) in a physical downlink control channel (PDCCH) triggering an aperiodic SRS transmission based on one or more SRS trigger states of activated SRS trigger states; and receiving, from the UE, aperiodic SRS in an aperiodic SRS resource set based on the DCI, wherein each of the activated SRS trigger states is associated with a transmission control indicator (TCI) state for transmitting the aperiodic SRS by the UE, and wherein the aperiodic SRS is associated with a quasi-co location (QCL) property similar as a reference signal associated with the one or more SRS trigger states. ### Claim 16 (depends on 15) The method of claim 15, wherein the reference signal is further associated with a panel identifier (ID) of the UE. ### Claim 17 (depends on 15) The method of claim 15, wherein the QCL property comprises at least one of a one or more port indications, a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial transmit (Tx) parameter, or a spatial receive (Rx) parameter. ### Claim 18 (depends on 15) The method of claim 15, wherein the reference signal is one of sounding reference signals (SRS), or a downlink (DL) reference signal (RS). ### Claim 19 (depends on 18) The method of claim 18, wherein the DL RS is one of channel state information (C SI) RS (CSI-RS), demodulation RS (DM-RS) for at least one of a physical downlink shared channel (PDSCH) or the PDCCH, or a synchronization signal/physical broadcast channel (PBCH) (SS/PBCH) block. ### Claim 20 An apparatus for wireless communication, the apparatus being a base station (BS), comprising: a memory; and at least one processor coupled to the memory and configured to: transmit, to a user equipment (UE), a configuration activating a subset of configured sounding reference signal (SRS) trigger states; transmit, to the UE, downlink control information (DCI) in a physical downlink control channel (PDCCH) triggering an aperiodic SRS transmission based on one or more SRS trigger states of activated SRS trigger states, wherein the DCI includes one or more codepoint values indicating the one or more SRS trigger states of the activated SRS trigger states; transmit a mapping between activated SRS trigger states and a set of codepoint values, the one or more codepoint values being within the set of codepoint values; and receive, from the UE, aperiodic SRS in an aperiodic SRS resource set based on the DCI. ### Claim 21 (depends on 20) The apparatus of claim 20, wherein each of the activated SRS trigger states is associated with at least one of time-frequency resources, a timing behavior, or a transmission control indicator (TCI) state for transmitting the aperiodic SRS by the UE, and wherein the aperiodic SRS is received based on the at least one of the time-frequency resources, the timing behavior, or the TCI state associated with the one or more SRS trigger states. ### Claim 22 An apparatus for wireless communication, the apparatus being a base station (BS), comprising: a memory; and at least one processor coupled to the memory and configured to: transmit, to a user equipment (UE), a configuration activating a subset of configured sounding reference signal (SRS) trigger states; transmit, to the UE, downlink control information (DCI) in a physical downlink control channel (PDCCH) triggering an aperiodic SRS transmission based on one or more SRS trigger states of activated SRS trigger states; and receive, from the UE, aperiodic SRS in an aperiodic SRS resource set based on the DCI, wherein each of the activated SRS trigger states is associated with a transmission control indicator (TCI) state for transmitting the aperiodic SRS by the UE, and wherein the aperiodic SRS is associated with a quasi-co location (QCL) property similar as a reference signal associated with the one or more SRS trigger states.