# US 12,764,755 B2 · Enhanced group dci format 2_3 for SRS transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,764,755 B2 - Document ID: US12764755B2 - Status: Granted - Kind: B2 - Application number: 18/280,760 - Filed: 2022-04-05 - Published: 2024-05-16 - Granted: 2026-10-13 - Earliest claimed: 2021-04-06 - Assignees: Intel Products IP LLC - Applicants: Intel Products IP LLC - Inventors: Guotong Wang; Alexei Davydov - Web page: https://patentgrep.com/patent/US12764755B2 ## CPC - H04W 72/232: the control data signalling from the physical layer, e.g. DCI signalling - H04W 72/1273: of downlink data flows - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract An apparatus and system for aperiodic sounding reference signals (SRS) transmission are described. Downlink control information (DCI) format 2_3 indicates a Transmission Configuration Indicator (TCI) state for beam indication for transmission of an SRS triggered by the DCI. An explicit field is added to the DCI to indicate the TCI state or the TCI state of the scheduling carrier used to transmit the DCI is used for the SRS. The TCI state indicates a joint uplink/downlink TCI state or a separate uplink or downlink TCI state. The DCI indicates an available slot to use for the SRS explicitly in a DCI field or implicitly based on the component carrier used for transmission of the SRS, the slotOffset parameter, or the first available slot. ## Claims ### Claim 1 An apparatus for a 5th generation NodeB (gNB), the apparatus comprising: processing circuitry to configure the gNB to: transmit, to a user equipment (UE), a physical downlink control channel (PDCCH) having downlink control information (DCI) format 2_3 that includes a dedicated beam indication field, separate from any Transmitter Power Control (TPC) command field in the DCI format 2_3, to indicate a Transmission Configuration Indicator (TCI) state that specifies a spatial domain transmission filter to be applied by the UE for transmission of an aperiodic sounding reference signal (SRS) triggered by the DCI, the DCI format 2_3 having, after an SRS request, one of: a single block that includes multiple Transmitter Power Control (TPC) commands and multiple TCI states in which each pair of TPC command and TCI state applies to a different uplink carrier than each other pair of TPC command and TCI state, each TCI state in the single block specifying a first spatial domain transmission filter for SRS transmission on a first corresponding uplink carrier, or at least one block that each includes a single TPC command and TCI state in which each block of the at least one block applies to a different uplink carrier than each other block of the at least one block, the TCI state in each block specifying a second spatial domain transmission filter for SRS transmission on a second corresponding uplink carrier; and receive, in response to transmission of the PDCCH, the aperiodic SRS from the UE transmitted using the first or second spatial domain transmission filter indicated by the TCI state; and a memory configured to store the DCI. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the dedicated field indicates a joint uplink and downlink TCI state. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the dedicated field indicates one of an uplink TCI state or a downlink TCI state for separate uplink and downlink TCI states. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the DCI format 2_3 has the single block. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the DCI format 2_3 has the at least one block. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein: the processing circuitry is further to configure the gNB to: transmit the PDCCH on a scheduling carrier, and indicate to the UE that the aperiodic SRS is to be transmitted on a target carrier, the target carrier Quasi Co-Located with the scheduling carrier, the aperiodic SRS following a TCI state of the scheduling carrier, and the TCI state is not explicitly included in the DCI. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein: the processing circuitry is further to configure the gNB to indicate that a common TCI state that crosses multiple carriers is available and that the aperiodic SRS is follow the common TCI state when the carriers are crossed, and the common TCI state is not explicitly included in the DCI. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein: the processing circuitry is further to configure the gNB to indicate to the UE that the aperiodic SRS is to be transmitted on a target carrier and to use an available TCI state independent of whether the available TCI state is an available joint uplink and downlink TCI state or separate uplink or downlink TCI state, and the TCI state is not explicitly included in the DCI. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein: the processing circuitry is further to configure the gNB to provide to the UE dynamic switching between single transmission-reception point (TRP) operation and multi-TRP operation, and the DCI includes, for each uplink carrier in multi-TRP operation: multiple TCI states, or a codepoint of a TCI state field in the DCI, the codepoint configured to indicate one of a plurality of TCI states, each of the plurality of TCI states is associated with a particular TRP. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the processing circuitry is further to configure the gNB to indicate to the UE, via the DCI, to avoid transmission of acknowledgment of a beam indication from the gNB, transmission of the aperiodic SRS acting as the acknowledgment of the beam indication from the gNB. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the processing circuitry is further to configure the gNB to trigger, via the DCI, transmission of the aperiodic SRS from multiple UEs over at least one carrier, an SRS resource set of the aperiodic SRS selected from a plurality of usages that include beam management, codebook, and non-codebook usage. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the processing circuitry is further to configure the gNB to indicate to the UE, via the DCI, an available slot for transmission of the aperiodic SRS, the available slot selected from a set of slots that include: an uplink slot, or a flexible slot having uplink or flexible orthogonal frequency division multiplexing (OFDM) symbols configured for SRS transmission. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein: the processing circuitry is further to configure the gNB to indicate, via radio resource control (RRC) signaling, an SRS resource set having a list of available slot values, and a value of the available slot is explicitly indicated in a DCI field of the DCI. ### Claim 14 (depends on 12) The apparatus of claim 12, wherein: the processing circuitry is further to configure the gNB to indicate, via radio resource control (RRC) signaling, an SRS resource set having multiple lists of available slot values, each list corresponding to a different component carrier, and a value of the available slot is one of: explicitly indicated in a DCI field of the DCI, or implicitly indicated by a DCI codepoint of an SRS request field of the DCI such that different values are applied for different component carriers. ### Claim 15 (depends on 1) The apparatus of claim 1, wherein: the processing circuitry is further to configure the gNB to indicate, via radio resource control (RRC) signaling, an SRS resource set having a list of available slot values for transmission of the aperiodic SRS, and a transmission slot for transmission of the aperiodic SRS is one of: based on an RRC parameter slotOffet, indicated by a specific slot value in the DCI, or a first available slot. ### Claim 16 (depends on 12) The apparatus of claim 12, wherein: the processing circuitry is further to configure the gNB to indicate, via radio resource control (RRC) signaling, an SRS resource set having a list of available slot values, and a value of the available slot is implicitly indicated by one of: a DCI codepoint of an SRS request field of the DCI, or a component carrier index of a component carrier to carry the aperiodic SRS. ### Claim 17 An apparatus for a user equipment (UE), the apparatus comprising: processing circuitry to configure the UE to: receive, from a 5th generation NodeB (gNB), a physical downlink control channel (PDCCH) having downlink control information (DCI) format 2_3 that includes a dedicated beam indication field, separate from any Transmitter Power Control (TPC) command field in the DCI format 2_3, to indicate a Transmission Configuration Indicator (TCI) state that specifies a spatial domain transmission filter to be applied by the UE for transmission of an aperiodic sounding reference signal (SRS) triggered by the DCI, the DCI format 2_3 having, after an SRS request, one of: a single block that includes multiple Transmitter Power Control (TPC) commands and multiple TCI states in which each pair of TPC command and TCI state applies to a different uplink carrier than each other pair of TPC command and TCI state, each TCI state in the single block specifying a first spatial domain transmission filter for SRS transmission on a first corresponding uplink carrier, or at least one block that each includes a single TPC command and TCI state in which each block of the at least one block applies to a different uplink carrier than each other block of the at least one block, the TCI state in each block specifying a second spatial domain transmission filter for SRS transmission on a second corresponding uplink carrier; and transmit, in response to reception of the PDCCH, the aperiodic SRS to the gNB using the first or second spatial domain transmission filter indicated by the TCI state; and a memory configured to store the DCI. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein: one of: the dedicated field indicates a joint uplink and downlink TCI state, or the dedicated field indicates one of an uplink TCI state or a downlink TCI state for separate uplink and downlink TCI states. ### Claim 19 A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of a 5th generation NodeB (gNB), the one or more processors to configure the gNB to, when the instructions are executed: transmit, to a user equipment (UE), a physical downlink control channel (PDCCH) having downlink control information (DCI) format 2_3 that includes a dedicated beam indication field, separate from any Transmitter Power Control (TPC) command field in the DCI format 2_3, to indicate a Transmission Configuration Indicator (TCI) state that specifies a spatial domain transmission filter to be applied by the UE for transmission of an aperiodic sounding reference signal (SRS) triggered by the DCI, the DCI format 2_3 having, after an SRS request, one of: a single block that includes multiple Transmitter Power Control (TPC) commands and multiple TCI states in which each pair of TPC command and TCI state applies to a different uplink carrier than each other pair of TPC command and TCI state, each TCI state in the single block specifying a first spatial domain transmission filter for SRS transmission on a first corresponding uplink carrier, or at least one block that each includes a single TPC command and TCI state in which each block of the at least one block applies to a different uplink carrier than each other block of the at least one block, the TCI state in each block specifying a second spatial domain transmission filter for SRS transmission on a second corresponding uplink carrier; and receive, in response to transmission of the PDCCH, the aperiodic SRS from the UE using the first or second spatial domain transmission filter indicated by the TCI state. ### Claim 20 (depends on 19) The non-transitory computer-readable storage medium of claim 19, wherein: one of: the dedicated field indicates a joint uplink and downlink TCI state, or the dedicated field indicates one of an uplink TCI state or a downlink TCI state for separate uplink and downlink TCI states.