Granted Patent B2

US 12,726,930 · App. 17/759,393 · Granted Sep 1, 2026

Inventors: Alexandros Manolakos (Escondido, CA); Seyedkianoush Hosseini (San Diego, CA); Krishna Kiran Mukkavilli (San Diego, CA)

Assignee: QUALCOMM Incorporated

H04W64/00H04L5/0051H04W76/15

Abstract

Claims (77)

1 . A method for wireless communication performed at a first user equipment (UE), comprising:

transmitting a first sidelink control information (SCI-1) message over a physical sidelink control channel (PSCCH) of a sidelink between the first UE and at least one second UE;

transmitting a second sidelink control information (SCI-2) message to the at least one second UE over the PSCCH of the sidelink, the SCI-2 message associated with the SCI-1 message, the SCI-2 message including a request to perform a positioning procedure, 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, and wherein the positioning procedure comprises a round-trip-time (RTT) positioning procedure;

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.

2 . The method of claim 1 , wherein:

the SCI-1 message is scrambled by a destination identifier, or

the destination identifier is a field inside the SCI-2 message.

3 . The method of claim 2 , 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.

4 . 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.

5 . 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.

6 . The method of claim 1 , 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.

7 . 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.

8 . The method of claim 7 , 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.

9 . The method of claim 8 , wherein the first reference signal transmitted by the first UE is the at least one positioning reference signal.

10 . The method of claim 8 , 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.

11 . The method of claim 8 , 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.

12 . The method of claim 8 , 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.

13 . 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.

14 . The method of claim 13 , 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.

15 . 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 the SCI-2 message.

16 . A method for wireless communication performed at a second user equipment (UE), comprising:

receiving a first sidelink control information (SCI-1) message over a physical sidelink control channel (PSCCH) of a sidelink between the second UE and a first UE;

receiving a second sidelink control information (SCI-2) message from the first UE over the PSCCH of the sidelink, the SCI-2 message associated with the SCI-1 message, the SCI-2 message including a request to perform a positioning procedure, 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, and wherein the positioning procedure comprises a round-trip-time (RTT) positioning procedure;

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.

17 . The method of claim 16 , wherein:

the SCI-1 message is scrambled by a destination identifier, or

the destination identifier is a field inside the SCI-2 message.

18 . The method of claim 17 , 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.

19 . The method of claim 16 , 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.

20 . The method of claim 19 , 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.

21 . The method of claim 20 , wherein the indication comprises a one-bit field in the SCI-1 message received from the first UE over the sidelink.

22 . The method of claim 16 , 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.

23 . The method of claim 16 , 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.

24 . The method of claim 23 , 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.

25 . The method of claim 24 , wherein the first reference signal transmitted by the first UE is the at least one positioning reference signal.

26 . The method of claim 16 , 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.

27 . The method of claim 26 , 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.

28 . The method of claim 16 , wherein the second UE encodes the indication of the set of time resources, frequency resources, or both allocated for the positioning procedure in the SCI-2 message.

29 . A first user equipment (UE), comprising:

one or more memories;

one or more transceivers; and

one or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processor, either alone or in combination, configured to:

transmit, via the one or more transceivers, a first sidelink control information (SCI-1) message over a physical sidelink control channel (PSCCH) of a sidelink between the first UE and at least one second UE;

transmit, via the one or more transceivers, a second sidelink control information (SCI-2) message to the at least one second UE over the PSCCH of the sidelink, the SCI-2 message associated with the SCI-1 message, the SCI-2 message including a request to perform a positioning procedure, 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, and wherein the positioning procedure comprises a round-trip-time (RTT) positioning procedure;

receive, via the one or more transceivers, 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

transmit, via the one or more transceivers, at least one positioning reference signal on the set of time resources, frequency resources, or both allocated for the positioning procedure.

30 . A second user equipment (UE), comprising:

one or more memories;

one or more transceivers; and

one or more processors communicatively coupled to the one or more memories and the one or more transceivers, the one or more processor, either alone or in combination, configured to:

receive, via the one or more transceivers, a first sidelink control information (SCI-1) message over a physical sidelink control channel (PSCCH) of a sidelink between the second UE and a first UE;

receive, via the one or more transceivers, a second sidelink control information (SCI-2) message from the first UE over the PSCCH of the sidelink, the SCI-2 message associated with the SCI-1 message, the SCI-2 message including a request to perform a positioning procedure, 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, and wherein the positioning procedure comprises a round-trip-time (RTT) positioning procedure;

transmit, via the one or more transceivers, the request to perform the positioning procedure to a first network entity;

receive, via the one or more transceivers, from a second network entity, an indication of a set of time resources, frequency resources, or both allocated for the positioning procedure; and

transmit, via the one or more transceivers, the indication of the set of time resources, frequency resources, or both allocated for the positioning procedure to the first UE over the sidelink.

31 . A first user equipment (UE), comprising:

means for transmitting a first sidelink control information (SCI-1) message over a physical sidelink control channel (PSCCH) of a sidelink between the first UE and at least one second UE;

means for transmitting a second sidelink control information (SCI-2) message to the at least one second UE over the PSCCH of the sidelink, the SCI-2 message associated with the SCI-1 message, the SCI-2 message including a request to perform a positioning procedure, 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, and wherein the positioning procedure comprises a round-trip-time (RTT) positioning procedure;

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.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (21)