# US 12,010,062 B2 · Implicit sounding reference signal aperiodic triggering offset > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,010,062 B2 - Document ID: US12010062B2 - Status: Granted - Kind: B2 - Application number: 17/288,723 - Filed: 2019-09-25 - Published: 2021-12-30 - Granted: 2024-06-11 - Earliest claimed: 2018-10-26 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget Lm Ericsson (Publ) - Inventors: Sebastian Faxér; Stephen Grant; Mattias Frenne - Web page: https://patentgrep.com/patent/US12010062B2 ## CPC - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/1273: of downlink data flows - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - 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 method is performed by a wireless device for transmitting a Sounding Reference Signal, SRS. The method comprises receiving downlink control information triggering an aperiodic SRS transmission, and identifying a slot indicated by the downlink control information. If the slot indicated by the downlink control information is a downlink slot, the wireless device transmits the SRS in a slot that is not a downlink slot. ## Claims ### Claim 1 A method performed by a wireless device for transmitting an aperiodic Sounding Reference Signal, SRS, the method comprising: receiving downlink control information triggering an aperiodic SRS transmission; identifying a first slot indicated by the downlink control information; and if at least one of one or more symbols of the aperiodic SRS would occur in a downlink symbol of the first slot, transmitting the aperiodic SRS in a second slot in which none of the one or more symbols of the aperiodic SRS occurs in a downlink symbol. ### Claim 2 (depends on 1) The method of claim 1, wherein the second slot is subsequent to the first slot. ### Claim 3 (depends on 1) The method of claim 1, wherein the second slot is an uplink slot. ### Claim 4 (depends on 1) The method of claim 1, wherein the second slot is a flexible slot and transmitting the aperiodic SRS comprises transmitting the aperiodic SRS in specified symbols of the flexible slot, wherein the specified symbols are not downlink symbols. ### Claim 5 (depends on 1) The method of claim 1, comprising receiving the downlink control information on a Physical Downlink Control Channel, PDCCH. ### Claim 6 (depends on 1) The method of claim 1, wherein identifying the slot indicated by the downlink control information comprises: receiving the downlink control information in a third slot; and identifying the slot indicated by the downlink control information based on a nominal slot offset therefrom, wherein the nominal slot offset is indicated by the downlink control information. ### Claim 7 (depends on 6) The method of claim 6, wherein the nominal slot offset is indicated implicitly by an SRS request field of the downlink control information. ### Claim 8 (depends on 7) The method of claim 7, wherein the nominal slot offset is indicated implicitly by the SRS request field of the downlink control information, selected from a plurality of predetermined possible nominal slot offsets. ### Claim 9 (depends on 8) The method of claim 8, wherein each one of the possible nominal slot offsets is configured using an RRC field, and wherein each codepoint of the SRS request field triggers one or more SRS resource set and each SRS resource set is associated with a nominal slot offset. ### Claim 10 (depends on 1) The method of claim 1, further comprising, as a preliminary step, obtaining a slot format configuration. ### Claim 11 (depends on 10) The method of claim 10, wherein the slot format configuration is a semi-static Time Division Duplex configuration provided by a higher protocol layer. ### Claim 12 (depends on 11) The method of claim 11, wherein the semi-static Time Division Duplex configuration is provided by a Radio Resource Control protocol layer. ### Claim 13 (depends on 10) The method of claim 10, wherein the slot format configuration is indicated by different downlink control information. ### Claim 14 (depends on 1) The method of claim 1, comprising transmitting the aperiodic SRS in symbols of the second slot. ### Claim 15 (depends on 1) The method of claim 1, further comprising: providing user data; and forwarding the user data to a host computer via the transmission to the base station. ### Claim 16 A method performed by a base station for triggering an aperiodic Sounding Reference Signal, SRS, transmission, the method comprising: transmitting downlink control information to a UE, wherein the downlink control information triggers the aperiodic SRS transmission by the UE, wherein the downlink control information identifies a first slot for the aperiodic SRS transmission by the UE; and receiving the aperiodic SRS in a second slot in which none of the one or more symbols of the aperiodic SRS occurs in a downlink symbol if said first slot, identified for the aperiodic SRS transmission by the UE, includes at least one downlink symbol in which a symbol of the aperiodic SRS would occur. ### Claim 17 (depends on 16) The method of claim 16, comprising transmitting the downlink control information to the UE in a third slot, wherein the downlink control information identifies the first slot for the aperiodic SRS transmission by the UE by indicating an offset relative to said third slot. ### Claim 18 (depends on 17) The method of claim 17, comprising indicating said offset implicitly by an SRS request field of the downlink control information. ### Claim 19 (depends on 18) The method of claim 18, wherein said offset is selected from a plurality of predetermined possible nominal slot offsets. ### Claim 20 (depends on 16) The method of claim 16, comprising indicating a slot format configuration in the downlink control information. ### Claim 21 (depends on 16) The method of claim 16, comprising transmitting the downlink control information on a Physical Downlink Control Channel, PDCCH. ### Claim 22 (depends on 16) The method of claim 16, further comprising: obtaining user data; and forwarding the user data to a host computer or a wireless device. ### Claim 23 (depends on 16) The method of claim 16, wherein the second slot is subsequent to the first slot. ### Claim 24 A wireless device comprising: a transmitter; a receiver; a processing circuitry; and a memory, wherein the memory contains instructions, which when executed by the processing circuitry causes the wireless device to: receive downlink control information triggering an aperiodic SRS transmission; identify a first slot indicated by the downlink control information; and if at least one of one or more symbols of the aperiodic SRS would occur in a downlink symbol of the first slot, transmit the aperiodic SRS in a second slot in which none of the one or more symbols of the aperiodic SRS occurs in a downlink symbol. ### Claim 25 A base station comprising: a transmitter; a receiver; a processing circuitry; and a memory, wherein the memory contains instructions, which when executed by the processing circuitry causes the base station to: transmit downlink control information to a UE, wherein the downlink control information triggers the aperiodic SRS transmission by the UE, wherein the downlink control information identifies a first slot for the aperiodic SRS transmission by the UE; and receive the aperiodic SRS in a second slot in which none of the one or more symbols of the aperiodic SRS occurs in a downlink symbol if said first slot, identified for the aperiodic SRS transmission by the UE, includes at least one downlink symbol in which a symbol of the aperiodic SRS would occur.