# US 12,114,323 B2 · Sounding reference signal coordination for periodic traffic > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,323 B2 - Document ID: US12114323B2 - Status: Granted - Kind: B2 - Application number: 17/522,692 - Filed: 2021-11-09 - Published: 2023-05-11 - Granted: 2024-10-08 - Earliest claimed: 2021-11-09 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Mickael Mondet; Prashanth Haridas Hande; Hyun Yong Lee; Peerapol Tinnakornsrisuphap; Hussein Metwaly Saad - Web page: https://patentgrep.com/patent/US12114323B2 ## CPC - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - 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)} - H04W 72/1268: of uplink data flows - 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 Methods, systems, and devices for wireless communications at a user equipment (UE) are described. A user equipment (UE) may receive a downlink control information scheduling transmission of periodic multimedia traffic bursts to the UE with a first periodic cadence. The UE may receive control signaling from the UE indicating that the UE is to periodically transmit sounding reference signals to the base station according to a second cadence, which may be a multiple of the first periodic cadence. Additionally or alternatively, the UE may receive control signaling indicating that the UE is to transmit a sounding reference signal at a time associated with a beginning of at least one of the periodic multimedia traffic bursts. The UE may transmit one or more sounding reference signals to the base station in accordance with the control signaling. ## Claims ### Claim 1 A method for wireless communications at a user equipment (UE), comprising: receiving, from a base station, a downlink control information message scheduling periodic downlink bursts of multimedia data traffic, the periodic downlink bursts of multimedia data traffic having a first periodic cadence; receiving, from the base station, control signaling that indicates that the UE is to periodically transmit sounding reference signals to the base station in accordance with a second periodic cadence, wherein the second periodic cadence is a multiple of the first periodic cadence; and transmitting the sounding reference signals to the base station in accordance with the second periodic cadence. ### Claim 2 (depends on 1) The method of claim 1, further comprising: aligning, within a first threshold, a beginning of a period of the second periodic cadence with a beginning of a first period of the first periodic cadence; and aligning, within a second threshold, an end of the period of the second periodic cadence with an end of a second period of the first periodic cadence. ### Claim 3 (depends on 1) The method of claim 1, further comprising: determining a plurality of sub-periods of the second periodic cadence, wherein at least one of the plurality of sub-periods is non-uniform as compared to one or more other sub-periods of the plurality of sub-periods, and one or more transitions between sub-periods align, within a second threshold, with the periodic downlink bursts of multimedia data traffic; and transmitting a plurality of additional sounding reference signals within a period of the second periodic cadence in accordance with the plurality of sub-periods. ### Claim 4 (depends on 1) The method of claim 1, wherein the control signaling further indicates a value for a sounding reference signal cadence parameter that defines the second periodic cadence. ### Claim 5 (depends on 1) The method of claim 1, further comprising: receiving control signaling, from the base station, that indicates a frequency hopping scheme based at least in part on a first counter corresponding to the second periodic cadence, a number of sub-periods contained within the second periodic cadence, and a sub-period index that identifies a sub-period contained within the second periodic cadence; and transmitting the sounding reference signals based at least in part on the frequency hopping scheme. ### Claim 6 (depends on 1) The method of claim 1, further comprising: receiving control signaling, from the base station, that indicates a sounding reference signal cadence parameter associated with the second periodic cadence and including a first value measured in hertz that defines the second periodic cadence; and transmitting the sounding reference signals based at least in part on the sounding reference signal cadence parameter. ### Claim 7 (depends on 6) The method of claim 6, further comprising: receiving control signaling, from the base station, that indicates a sounding reference signal offset parameter associated with the second periodic cadence and including a second value that corresponds to the first value; and transmitting the sounding reference signals based at least in part on the sounding reference signal offset parameter. ### Claim 8 (depends on 7) The method of claim 7, further comprising: determining one or more candidate slots for transmission of the sounding reference signals based at least in part on a subframe number, the sounding reference signal cadence parameter, the sounding reference signal offset parameter, or any combination thereof; selecting one or more of the one or more candidate slots; and transmitting the sounding reference signals in the one or more selected candidate slots. ### Claim 9 (depends on 6) The method of claim 6, further comprising: receiving control signaling, from the base station, that indicates a frequency hopping scheme based at least in part on the sounding reference signal cadence parameter, a system frame number, and a subframe number; and transmitting the sounding reference signals based at least in part on the frequency hopping scheme. ### Claim 10 A user equipment (UE) for wireless communications, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the UE to: receive, from a base station, a downlink control information message scheduling periodic downlink bursts of multimedia data traffic, the periodic downlink bursts of multimedia data traffic having a first periodic cadence; receive, from the base station, control signaling that indicates that the UE is to periodically transmit sounding reference signals to the base station in accordance with a second periodic cadence, wherein the second periodic cadence is a multiple of the first periodic cadence; and transmit the sounding reference signals to the base station in accordance with the second periodic cadence. ### Claim 11 (depends on 10) The UE of claim 10, wherein the instructions are further executable by the processor to cause the UE to: align, within a first threshold, a beginning of a period of the second periodic cadence with a beginning of a first period of the first periodic cadence; and align, within a second threshold, an end of the period of the second periodic cadence with an end of a second period of the first periodic cadence. ### Claim 12 (depends on 10) The UE of claim 10, wherein the instructions are further executable by the processor to cause the UE to: determine a plurality of sub-periods of the second periodic cadence, wherein at least one of the plurality of sub-periods is non-uniform as compared to one or more other sub-periods of the plurality of sub-periods, and one or more transitions between sub-periods align, within a second threshold, with the periodic downlink bursts of multimedia data traffic; and transmit a plurality of additional sounding reference signals within a period of the second periodic cadence in accordance with the plurality of sub-periods. ### Claim 13 (depends on 10) The UE of claim 10, wherein the control signaling further indicates a value for a sounding reference signal cadence parameter that defines the second periodic cadence. ### Claim 14 (depends on 10) The UE of claim 10, wherein the instructions are further executable by the processor to cause the UE to: receive control signaling, from the base station, that indicates a frequency hopping scheme based at least in part on a first counter corresponding to the second periodic cadence, a number of sub-periods contained within the second periodic cadence, and a sub-period index that identifies a sub-period contained within the second periodic cadence; and transmit the sounding reference signals based at least in part on the frequency hopping scheme. ### Claim 15 (depends on 10) The UE of claim 10, wherein the instructions are further executable by the processor to cause the UE to: receive control signaling, from the base station, that indicates a sounding reference signal cadence parameter associated with the second periodic cadence and including a first value measured in hertz that defines the second periodic cadence; and transmit the sounding reference signals based at least in part on the sounding reference signal cadence parameter.