# US 2023/0056831 A1 · Methods and apparatuses for sidelink-assisted cooperative positioning > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0056831 A1 - Document ID: US20230056831A1 - Status: Published application - Kind: A1 - Application number: 17/759,393 - Filed: 2021-02-03 - Published: 2023-02-23 - Earliest claimed: 2020-03-20 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Alexandros MANOLAKOS; Seyedkianoush HOSSEINI; Krishna Kiran MUKKAVILLI - Web page: https://patentgrep.com/patent/US20230056831A1 ## CPC - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - 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 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 76/15: Setup of multiple wireless link connections - H04W 88/02: Terminal devices - H04W 88/04: adapted for relaying to or from another terminal or user - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Disclosed are techniques for wireless communication. In an aspect, a first user equipment (UE) transmits a request to perform a positioning procedure to at least one second UE over a sidelink between the first UE and the at least one second UE, receives, from the at least one second UE over the sidelink, an indication of a set of time resources, frequency resources, or both allocated for the positioning procedure, and transmits at least one positioning reference signal on the set of time and/or frequency resources allocated for the positioning procedure. The second UE receives the request to perform the positioning procedure from the first UE over the sidelink, transmits the request to a base station, receives, from the base station, an indication of the set of time and/or frequency resources allocated for the positioning procedure, and transmits the indication to the first UE over the sidelink. ## Claims ### Claim 1 A method for wireless communication performed at a first user equipment (UE), comprising: transmitting a request to perform a positioning procedure to at least one second UE over a sidelink between the first UE and the at least one second UE; receiving, from the at least one second UE over the sidelink, an indication of a set of time resources, frequency resources, or both allocated for the positioning procedure; and transmitting at least one positioning reference signal on the set of time resources, frequency resources, or both allocated for the positioning procedure. ### Claim 2 (depends on 1) The method of claim 1, wherein transmitting the request comprises: transmitting a first sidelink control information (SCI-1) message over a physical sidelink control channel (PSCCH) of the sidelink, the SCI-1 associated with a second sidelink control information (SCI-2), the SCI-2 including the request to perform the positioning procedure; and transmitting the SCI-2 message over the PSCCH of the sidelink. ### Claim 3 (canceled) ### Claim 4 (depends on 2) The method of claim 2, wherein: the SCI-1 is scrambled by a destination identifier, or the destination identifier is a field inside the SCI-2. ### Claim 5 (depends on 4) The method of claim 4, wherein: the destination identifier identifies a group of UEs including the at least one second UE, or the destination identifier indicates that the request to perform the positioning procedure is a broadcast to all UEs within wireless communication range of the first UE. ### Claim 6 (canceled) ### Claim 7 (depends on 1) The method of claim 1, wherein the transmitting the request comprises: transmitting a medium access control control element (MAC-CE) on a physical sidelink shared channel (PSSCH) of the sidelink, the MAC-CE including the request to perform the positioning procedure. ### Claim 8 (depends on 1) The method of claim 1, further comprising: transmitting, over a physical sidelink shared channel (PSSCH) of the sidelink, a demodulation reference signal (DMRS) associated with the request to perform the positioning procedure, wherein the request to perform the positioning procedure includes an indication that the DMRS is to be used for the positioning procedure. ### Claim 9 (canceled) ### Claim 10 (depends on 1) The method of claim 1, wherein the request to perform the positioning procedure includes an indication of whether or not at least one reference signal associated with the request to perform the positioning procedure is to be used for positioning. ### Claim 11 (depends on 10) The method of claim 10, wherein the indication further indicates a number of the at least one reference signal, time locations, frequency locations, or both of the at least one reference signal, or both. ### Claim 12 (depends on 1) The method of claim 1, wherein the request to perform the positioning procedure includes an indication that the at least one second UE is expected to perform the positioning procedure with the first UE. ### Claim 13 (canceled) ### Claim 14 (depends on 12) The method of claim 12, wherein the positioning procedure comprises a round-trip-time (RTT) positioning procedure, the method further comprising: receiving, from the at least one second UE, a second reference signal and a parameter indicating a time difference between reception at the second UE of a first reference signal transmitted by the first UE and a transmission time of the second reference signal. ### Claim 15 (depends on 14) The method of claim 14, wherein the first reference signal transmitted by the first UE is the at least one positioning reference signal. ### Claim 16 (canceled) ### Claim 17 (depends on 14) The method of claim 14, further comprising: estimating an absolute location of the first UE based at least on a time difference between transmission of the first reference signal and reception of the second reference signal, the parameter indicating the time difference between reception at the at least one second UE of the first reference signal and the transmission time of the second reference signal, and a known location of the at least one second UE, wherein the at least one second UE comprises a plurality of UEs. ### Claim 18 (depends on 14) The method of claim 14, further comprising: estimating a relative location of the first UE based at least on a time difference between transmission of the first reference signal and reception of the second reference signal, the parameter indicating the time difference between reception at the at least one second UE of the first reference signal and the transmission time of the second reference signal. ### Claim 19 (depends on 14) The method of claim 14, wherein: the first UE transmits the first reference signal on a transmit beam, the second reference signal is transmitted by the at least one second UE on a transmit beam and received by the first UE on a receive beam, or any combination thereof. ### Claim 20 (canceled) ### Claim 21 (canceled) ### Claim 22 (depends on 1) The method of claim 1, wherein the request to perform the positioning procedure includes an indication that the at least one second UE is expected to report, to the first UE, a time difference between reception at the second UE of a reference signal transmitted by the first UE and reception at the second UE of a reference signal transmitted by a third UE involved in the positioning procedure with the first UE. ### Claim 23 (depends on 22) The method of claim 22, wherein a destination identifier in the request to perform the positioning procedure indicates that the at least one second UE is expected to report the time difference between reception at the second UE of the reference signal transmitted by the first UE and reception at the second UE of the reference signal transmitted by the third UE. ### Claim 24 (depends on 1) The method of claim 1, wherein the indication of the set of time resources, frequency resources, or both allocated for the positioning procedure is encoded in an SCI-2 message. ### Claim 25 A method for wireless communication performed at a second user equipment (UE), comprising: receiving a request to perform a positioning procedure from a first UE over a sidelink between the second UE and the first UE; transmitting the request to perform the positioning procedure to a first network entity; receiving, from a second network entity, an indication of a set of time resources, frequency resources, or both allocated for the positioning procedure; and transmitting the indication of the set of time resources, frequency resources, or both allocated for the positioning procedure to the first UE over the sidelink. ### Claim 26 (depends on 25) The method of claim 25, wherein receiving the request comprises: receiving a first sidelink control information (SCI-1) message over a physical sidelink control channel (PSCCH) of the sidelink, the SCI-1 associated with a second sidelink control information (SCI-2), the SCI-2 including the request to perform the positioning procedure; and receiving the SCI-2 message over the PSCCH of the sidelink. ### Claim 27 (canceled) ### Claim 28 (depends on 26) The method of claim 26, wherein: the SCI-1 is scrambled by a destination identifier, or the destination identifier is a field inside the SCI-2. ### Claim 29 (depends on 28) The method of claim 28, wherein: the destination identifier identifies a group of UEs including the second UE, or the destination identifier indicates that the request to perform the positioning procedure is a broadcast to all UEs within wireless communication range of the first UE. ### Claim 30 (canceled) ### Claim 31 (canceled) ### Claim 32 (depends on 25) The method of claim 25, further comprising: receiving, over a physical sidelink shared channel (PSSCH) of the sidelink, a demodulation reference signal (DMRS) associated with the request to perform the positioning procedure. ### Claim 33 (depends on 32) The method of claim 32, wherein the request to perform the positioning procedure includes an indication that the DMRS is to be used for the positioning procedure, the method further comprising: performing a positioning measurement of the DMRS based on the indication that the DMRS is to be used for the positioning procedure. ### Claim 34 (canceled) ### Claim 35 (depends on 33) The method of claim 33, wherein the indication comprises a one-bit field in an SCI-1 received from the first UE over the sidelink. ### Claim 36 (depends on 25) The method of claim 25, wherein the request to perform the positioning procedure includes an indication of whether or not at least one reference signal associated with the request to perform the positioning procedure is to be used for positioning. ### Claim 37 (depends on 36) The method of claim 36, wherein the indication further indicates a number of the at least one reference signal, time locations, frequency locations, or both of the at least one reference signal, or both. ### Claim 38 (depends on 25) The method of claim 25, wherein the request to perform the positioning procedure includes an indication that the second UE is expected to perform the positioning procedure with the first UE. ### Claim 39 (canceled) ### Claim 40 (depends on 38) The method of claim 38, wherein the positioning procedure comprises a round-trip-time (RTT) positioning procedure, the method further comprising: transmitting, to the first UE over the sidelink, a second reference signal and a parameter indicating a time difference between reception at the second UE of a first reference signal transmitted by the first UE and transmission of the second reference signal. ### Claim 41 (depends on 40) The method of claim 40, wherein the first reference signal transmitted by the first UE is the at least one positioning reference signal. ### Claim 42 (canceled) ### Claim 43 (canceled) ### Claim 44 (depends on 25) The method of claim 25, wherein the request to perform the positioning procedure includes an indication that the second UE is expected to report, to the first UE, a time difference between reception at the second UE of a reference signal transmitted by the first UE and reception at the second UE of a reference signal transmitted by a third UE involved in the positioning procedure with the first UE. ### Claim 45 (depends on 44) The method of claim 44, wherein a destination identifier in the request to perform the positioning procedure indicates that the second UE is expected to report the time difference between reception at the second UE of the reference signal transmitted by the first UE and reception at the second UE of the reference signal transmitted by the third UE. ### Claim 46 (depends on 25) The method of claim 25, wherein the second UE encodes the indication of the set of time resources, frequency resources, or both allocated for the positioning procedure in an SCI-2 message. ### Claim 47 (canceled) ### Claim 48 A first user equipment (UE), comprising: a memory; at least one transceiver; and at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to: cause the at least one transceiver to transmit a request to perform a positioning procedure to at least one second UE over a sidelink between the first UE and the at least one second UE; receive, from the at least one second UE over the sidelink, an indication of a set of time resources, frequency resources, or both allocated for the positioning procedure; and cause the at least one transceiver to transmit at least one positioning reference signal on the set of time resources, frequency resources, or both allocated for the positioning procedure. ### Claim at position 49 49-71. (canceled) ### Claim 72 A second user equipment (UE), comprising: a memory; at least one transceiver; and at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to: receive a request to perform a positioning procedure from a first UE over a sidelink between the second UE and the first UE; cause the at least one transceiver to transmit the request to perform the positioning procedure to a first network entity; receive, from a second network entity, an indication of a set of time resources, frequency resources, or both allocated for the positioning procedure; and cause the at least one transceiver to transmit the indication of the set of time resources, frequency resources, or both allocated for the positioning procedure to the first UE over the sidelink. ### Claim at position 51 73-94. (canceled) ### Claim 95 A first user equipment (UE), comprising: means for transmitting a request to perform a positioning procedure to at least one second UE over a sidelink between the first UE and the at least one second UE; means for receiving, from the at least one second UE over the sidelink, an indication of a set of time resources, frequency resources, or both allocated for the positioning procedure; and means for transmitting at least one positioning reference signal on the set of time resources, frequency resources, or both allocated for the positioning procedure. ### Claim at position 53 96-98. (canceled)