# US 2023/0054488 A1 · Sounding reference signal configuration for at least two transmission/reception points > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0054488 A1 - Document ID: US20230054488A1 - Status: Published application - Kind: A1 - Application number: 17/759,508 - Filed: 2021-02-18 - Published: 2023-02-23 - Earliest claimed: 2020-02-21 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Alexandros MANOLAKOS; Muhammad Sayed Khairy ABDELGHAFFAR; Krishna Kiran MUKKAVILLI - Web page: https://patentgrep.com/patent/US20230054488A1 ## CPC - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems - H04B 7/0617: {for beam forming} - H04B 7/0848: {Joint weighting} - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04L 5/0023: {Time-frequency-space} - H04L 5/0078: {Timing of allocation} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION ## Abstract In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE or a component thereof. The apparatus may be configured to receive a first downlink reference signal associated with a first TRP. The apparatus may be further configured to receive a second downlink reference signal associated with a second TRP. The apparatus may be further configured to transmit, to the first TRP and the second TRP, at least one sounding reference signal that is associated with both the first downlink reference signal and the second downlink reference signal. ## Claims ### Claim 1 A method of wireless communication by a user equipment (UE), comprising: receiving a first downlink reference signal associated with a first transmission reception point; receiving a second downlink reference signal associated with a second transmission reception point; and transmitting, to the first transmission reception point and the second transmission reception point, at least one sounding reference signal (SRS) that is associated with both the first downlink reference signal and the second downlink reference signal. ### Claim 2 (depends on 1) The method of claim 1, wherein the at least one SRS is transmitted in a first symbol with at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, and the at least one SRS is further transmitted in the first symbol with at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal. ### Claim 3 (depends on 1) The method of claim 1, wherein: the at least one SRS is associated with at least one SRS resource comprising a first set of symbols and a second set of symbols, the at least one SRS is transmitted in the first set of symbols using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, and the at least one SRS is transmitted in the second set of symbols using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal. ### Claim 4 (depends on 3) The method of claim 3, wherein the first set of symbols and the second set of symbols have a same number of symbols. ### Claim 5 (depends on 3) The method of claim 3, wherein the first set of symbols comprises one or more symbols that are consecutive, and the second set of symbols comprises one or more other symbols that are consecutive. ### Claim 6 (depends on 3) The method of claim 3, wherein the first set of symbols are time-domain interleaved with the second set of symbols. ### Claim 7 (depends on 1) The method of claim 1, wherein: at least one SRS resource at least partially occurs in each of slot i and slot i+1, the at least one SRS resource comprising a first set of symbols and a second set of symbols different from the first set of symbols in each slot, the at least one SRS is transmitted using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal in the first set of symbols of the at least one SRS resource in slot i, the at least one SRS is further transmitted using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal in the second set of symbols of the at least one SRS resource in slot i, and the at least one SRS is transmitted using the at least one of the first spatial domain filter or the first precoding configuration in the second set of symbols of the at least one SRS resource in slot i+1. ### Claim 8 (depends on 7) The method of claim 7, wherein the at least one SRS is transmitted using the at least one of the second spatial domain filter or the second precoding configuration in the first set of symbols of the at least one SRS resource in slot i+1. ### Claim 9 (depends on 1) The method of claim 1, wherein the at least one SRS is transmitted on at least one SRS resource of an SRS resource set associated with codebook-based transmission, and the at least one SRS resource is associated with both the first downlink reference signal and the second downlink reference signal. ### Claim 10 (depends on 1) The method of claim 1, wherein: the at least one SRS is transmitted on a first SRS resource of an SRS resource set using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, and the at least one SRS is transmitted on a second SRS resource of the SRS resource set using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal. ### Claim 11 (depends on 10) The method of claim 10, wherein transmission of the at least one SRS resource on the first SRS resource and the second SRS resource of the at least one SRS resource set is configured to be non-codebook-based. ### Claim 12 (depends on 1) The method of claim 1, wherein: the at least one SRS is associated with an SRS resource set comprising a first SRS resource and a second SRS resource that each includes a first set of symbols and a second set of symbols, the at least one SRS is transmitted on both the first set of symbols of the first SRS resource and in the first set of symbols of the second SRS resource using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, and the at least one SRS is transmitted on both the second set of symbols of the first SRS resource and in the second set of symbols of the second SRS resource using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal. ### Claim 13 (depends on 1) The method of claim 1, further comprising: receiving a third downlink reference signal associated with a third transmission reception point, wherein the at least one SRS is transmitted on an SRS resource of an SRS resource set using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, the at least one SRS is further transmitted on the SRS resource using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal, and the at least one SRS is further transmitted on another SRS resource of the SRS resource set using at least one of a third spatial domain filter or a third precoding configuration corresponding to reception of the third downlink reference signal. ### Claim 14 An apparatus for wireless communication, comprising: a memory; and at least one processor coupled to the memory and configured to: receive a first downlink reference signal associated with a first transmission reception point; receive a second downlink reference signal associated with a second transmission reception point; and transmit, to the first transmission reception point and the second transmission reception point, at least one sounding reference signal (SRS) that is associated with both the first downlink reference signal and the second downlink reference signal. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the at least one SRS is transmitted in a first symbol with at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, and the at least one SRS is further transmitted in the first symbol with at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein: the at least one SRS is associated with at least one SRS resource comprising a first set of symbols and a second set of symbols, the at least one SRS is transmitted in the first set of symbols using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, and the at least one SRS is transmitted in the second set of symbols using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the first set of symbols and the second set of symbols have a same number of symbols. ### Claim 18 (depends on 16) The apparatus of claim 16, wherein the first set of symbols comprises one or more symbols that are consecutive, and the second set of symbols comprises one or more other symbols that are consecutive. ### Claim 19 (depends on 16) The apparatus of claim 16, wherein the first set of symbols are time-domain interleaved with the second set of symbols. ### Claim 20 (depends on 14) The apparatus of claim 14, wherein: at least one SRS resource at least partially occurs in each of slot i and slot i+1, the at least one SRS resource comprising a first set of symbols and a second set of symbols different from the first set of symbols in each slot, the at least one SRS is transmitted using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal in the first set of symbols of the at least one SRS resource in slot i, the at least one SRS is further transmitted using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal in the second set of symbols of the at least one SRS resource in slot i, and the at least one SRS is transmitted using the at least one of the first spatial domain filter or the first precoding configuration in the second set of symbols of the at least one SRS resource in slot i+1. ### Claim 21 (depends on 20) The apparatus of claim 20, wherein the at least one SRS is transmitted using the at least one of the second spatial domain filter or the second precoding configuration in the first set of symbols of the at least one SRS resource in slot i+1. ### Claim 22 (depends on 14) The apparatus of claim 14, wherein the at least one SRS is transmitted on at least one SRS resource of an SRS resource set associated with codebook-based transmission, and the at least one SRS resource is associated with both the first downlink reference signal and the second downlink reference signal. ### Claim 23 (depends on 14) The apparatus of claim 14, wherein: the at least one SRS is transmitted on a first SRS resource of an SRS resource set using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, and the at least one SRS is transmitted on a second SRS resource of the SRS resource set using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein transmission of the at least one SRS resource on the first SRS resource and the second SRS resource of the at least one SRS resource set is configured to be non-codebook-based. ### Claim 25 (depends on 14) The apparatus of claim 14, wherein: the at least one SRS is associated with an SRS resource set comprising a first SRS resource and a second SRS resource that each includes a first set of symbols and a second set of symbols, the at least one SRS is transmitted on both the first set of symbols of the first SRS resource and in the first set of symbols of the second SRS resource using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, and the at least one SRS is transmitted on both the second set of symbols of the first SRS resource and in the second set of symbols of the second SRS resource using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal. ### Claim 26 (depends on 14) The apparatus of claim 14, wherein the at least one processor is further configured to: receive a third downlink reference signal associated with a third transmission reception point, wherein the at least one SRS is transmitted on an SRS resource of an SRS resource set using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, the at least one SRS is further transmitted on the SRS resource using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal, and the at least one SRS is further transmitted on another SRS resource of the SRS resource set using at least one of a third spatial domain filter or a third precoding configuration corresponding to reception of the third downlink reference signal. ### Claim 27 An apparatus for wireless communication by a user equipment (UE), comprising: means for receiving a first downlink reference signal associated with a first transmission reception point; means for receiving a second downlink reference signal associated with a second transmission reception point; and means for transmitting, to the first transmission reception point and the second transmission reception point, at least one sounding reference signal (SRS) that is associated with both the first downlink reference signal and the second downlink reference signal. ### Claim 28 (depends on 27) The apparatus of claim 27, wherein the at least one SRS is transmitted in a first symbol with at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, and the at least one SRS is further transmitted in the first symbol with at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal. ### Claim 29 (depends on 27) The apparatus of claim 27, wherein: the at least one SRS is associated with at least one SRS resource comprising a first set of symbols and a second set of symbols, the at least one SRS is transmitted in the first set of symbols using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, and the at least one SRS is transmitted in the second set of symbols using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal. ### Claim 30 (depends on 29) The apparatus of claim 29, wherein the first set of symbols and the second set of symbols have a same number of symbols. ### Claim 31 (depends on 29) The apparatus of claim 29, wherein the first set of symbols comprises one or more symbols that are consecutive, and the second set of symbols comprises one or more other symbols that are consecutive. ### Claim 32 (depends on 29) The apparatus of claim 29, wherein the first set of symbols are time-domain interleaved with the second set of symbols. ### Claim 33 (depends on 27) The apparatus of claim 27, wherein: at least one SRS resource at least partially occurs in each of slot i and slot i+1, the at least one SRS resource comprising a first set of symbols and a second set of symbols different from the first set of symbols in each slot, the at least one SRS is transmitted using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal in the first set of symbols of the at least one SRS resource in slot i, the at least one SRS is further transmitted using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal in the second set of symbols of the at least one SRS resource in slot i, and the at least one SRS is transmitted using the at least one of the first spatial domain filter or the first precoding configuration in the second set of symbols of the at least one SRS resource in slot i+1. ### Claim 34 (depends on 33) The apparatus of claim 33, wherein the at least one SRS is transmitted using the at least one of the second spatial domain filter or the second precoding configuration in the first set of symbols of the at least one SRS resource in slot i+1. ### Claim 35 (depends on 27) The apparatus of claim 27, wherein the at least one SRS is transmitted on at least one SRS resource of an SRS resource set associated with codebook-based transmission, and the at least one SRS resource is associated with both the first downlink reference signal and the second downlink reference signal. ### Claim 36 (depends on 27) The apparatus of claim 27, wherein: the at least one SRS is transmitted on a first SRS resource of an SRS resource set using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, and the at least one SRS is transmitted on a second SRS resource of the SRS resource set using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal. ### Claim 37 (depends on 36) The apparatus of claim 36, wherein transmission of the at least one SRS resource on the first SRS resource and the second SRS resource of the at least one SRS resource set is configured to be non-codebook-based. ### Claim 38 (depends on 27) The apparatus of claim 27, wherein: the at least one SRS is associated with an SRS resource set comprising a first SRS resource and a second SRS resource that each includes a first set of symbols and a second set of symbols, the at least one SRS is transmitted on both the first set of symbols of the first SRS resource and in the first set of symbols of the second SRS resource using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, and the at least one SRS is transmitted on both the second set of symbols of the first SRS resource and in the second set of symbols of the second SRS resource using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal. ### Claim 39 (depends on 27) The apparatus of claim 27, further comprising: means for receiving a third downlink reference signal associated with a third transmission reception point, wherein the at least one SRS is transmitted on an SRS resource of an SRS resource set using at least one of a first spatial domain filter or a first precoding configuration corresponding to reception of the first downlink reference signal, the at least one SRS is further transmitted on the SRS resource using at least one of a second spatial domain filter or a second precoding configuration corresponding to reception of the second downlink reference signal, and the at least one SRS is further transmitted on another SRS resource of the SRS resource set using at least one of a third spatial domain filter or a third precoding configuration corresponding to reception of the third downlink reference signal. ### Claim 40 A computer-readable medium storing computer-executable code for wireless communication by a user equipment (UE), the code when executed by a processor cause the processor to: receive a first downlink reference signal associated with a first transmission reception point; receive a second downlink reference signal associated with a second transmission reception point; and transmit, to the first transmission reception point and the second transmission reception point, at least one sounding reference signal (SRS) that is associated with both the first downlink reference signal and the second downlink reference signal.