# US 11,445,464 B2 · Group reporting of user equipment measurements in multi-round trip time positioning

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- Number: US 11,445,464 B2
- Document ID: US11445464B2
- Status: Granted
- Kind: B2
- Application number: 16/738,988
- Filed: 2020-01-09
- Published: 2020-07-16
- Granted: 2022-09-13
- Earliest claimed: 2019-01-11
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Alexandros Manolakos; Jay Kumar Sundararajan; Joseph Binamira Soriaga; Tingfang Ji
- Web page: https://patentgrep.com/patent/US11445464B2

## CPC

- H04W 64/003: {locating network equipment}
- G01S 5/0009: {Transmission of position information to remote stations (involving assistance data G01S5/0236)}
- G01S 5/0036: {of measured values, i.e. measurement on mobile and position calculation on base station}
- G01S 5/0236: {Assistance data, e.g. base station almanac}
- G01S 5/02585: {at least one of the measurements being a non-radio measurement}
- G01S 5/10: Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements {, e.g. omega or decca systems}(G01S5/12 takes precedence {; beacons and receivers cooperating therewith G01S1/306, G01S1/308})
- G01S 5/14: Determining absolute distances from a plurality of spaced points of known location
- G01S 19/48: by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
- H04L 5/001: {the frequencies being arranged in component carriers}
- 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 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04W 56/0045: {compensating for timing error by altering transmission time}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- G01S 2205/008: using a mobile telephone network
- H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management
- H04W 88/18: Service support devices; Network management devices
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Disclosed are techniques for group reporting of UE receive-transmit (Rx-Tx) time difference measurements for multi-RTT positioning. A plurality of downlink reference signals (DL RSs) are received from a plurality of transmission reception points (TRPs). A corresponding plurality of uplink reference signals (UL RSs) are transmitted to the plurality of TRPs. One or more numerology factors are determined for the plurality of TRPs. A measurement report is generated for the plurality of TRPs based on the numerology factors. The measurement report is transmitted to a network entity. The measurement report includes UE receive-transmit (Rx-Tx) time difference measurements for at least two of the TRPs.

## Claims

### Claim 1

A method performed by a user equipment (UE), the method comprising:
receiving a plurality of downlink reference signals (DL RSs) from a plurality of transmission reception points (TRPs);
transmitting a corresponding plurality of uplink reference signals (UL RSs) to the plurality of TRPs; and
transmitting a measurement report for the plurality of TRPs to a network entity, wherein the measurement report is generated based on one or more numerology factors, wherein the measurement report includes a receive-transmit (Rx-Tx) time difference for at least two TRPs of the plurality of TRPs, and wherein a step size for reporting the Rx-Tx time difference is based on a time unit Tc and the one or more numerology factors.

### Claim 2 (depends on 1)

The method of claim 1, wherein the Rx-Tx time difference for each TRP is denoted as UERx-Tx,k (time_diff) for each TRP k of the plurality of TRPs, where k is an integer, is defined as TUE,Rx,k−TUE,Tx,k in which TUE,Rx,k is a UE received timing of a downlink (DL) radio subframe from the TRP k, and TUE,Tx,k is the UE transmit time of corresponding uplink (UL) radio subframe to the TRP k.

### Claim 3 (depends on 1)

The method of claim 1, wherein each DL RS is a positioning reference signal (PRS) and each UL RS is a sounding reference signal (SRS) for positioning.

### Claim 4 (depends on 1)

The method of claim 1, wherein a numerology factor of the one or more numerology factors of a TRP k of the plurality of TRPs, where kis an integer, is configured separately from configuring of a subcarrier spacing (SCS) of a DL RS received from the TRP k and independent of a SCS of a UL RS transmitted to the TRP k.

### Claim 5 (depends on 1)

The method of claim 1, wherein a numerology factor of the one or more numerology factors of a TRP k of the plurality of TRPs, where k is an integer, is determined based on at least one of one or more characteristics of a DL RS received from the TRP k or one or more characteristics of a UL RS transmitted to the TRP k.

### Claim 6 (depends on 5)

The method of claim 5, wherein the numerology factor of the TRP k is determined:
based on a larger subcarrier spacing (SCS) of the DL RS and the UL RS,
based on a smaller subcarrier spacing (SCS) of the DL RS and the UL RS,
based on a bandwidth of the DL RS or a bandwidth of the UL RS,
as a function of min(the bandwidth of the DL RS, the bandwidth of the UL RS), or
as a function of max(the bandwidth of the DL RS, the bandwidth of the UL RS).

### Claim 7 (depends on 1)

The method of claim 1, wherein a same numerology factor is assigned for all TRPs.

### Claim 8 (depends on 1)

The method of claim 1, wherein the measurement report includes, for a TRP k, of the plurality of TRPs, where k is an integer, a Rx-Tx time difference field configured to hold a Rx-Tx time difference of the TRP k, and
wherein for at least one TRP n, of the plurality of TRPs, where n is an integer, an entire width of a Rx-Tx time difference field for TRP n is used to hold a Rx-Tx time difference of the TRP n.

### Claim 9 (depends on 1)

The method of claim 1, wherein generating the measurement report comprises:
determining one or more TRP groups;
determining, for each TRP group, a reference TRP having a Rx-Tx time difference (UERx-Tx) as a reference UERx-Tx for each TRP group; and
determining, for each non-reference TRP of each TRP group, a differential UERx-Tx for each non-reference TRP from the reference UERx-Tx of each TRP group.

### Claim 10 (depends on 9)

The method of claim 9, wherein the one or more TRP groups are determined such that within each TRP group, a numerology factor of the one or more numerology factors is a same value for all member TRPs of each TRP group.

### Claim 11 (depends on 9)

The method of claim 9, wherein the one or more TRP groups along with the reference TRP of each TRP group are explicitly configured.

### Claim 12 (depends on 9)

The method of claim 9, wherein for at least one TRP group of the one or more TRP groups at least one of:
all member TRPs transmit positioning reference signals (PRSs) on a same slot,
all member TRPs transmit positioning reference signals (PRSs) on a same frame, or
all member TRPs transmit positioning reference signals (PRSs) on same symbols.

### Claim 13 (depends on 9)

The method of claim 9, wherein the one or more TRP groups are determined such that for at least one TRP group of the one or more TRP groups, a sounding reference signal (SRS) configuration is associated with member TRPs of the at least one TRP group.

### Claim 14 (depends on 9)

The method of claim 9, wherein the one or more TRP groups are determined based on at least one of timing advance (TA) commands or different timing advance groups (TAGs).

### Claim 15 (depends on 9)

The method of claim 9, wherein a number of bits for representing the differential UERx-Tx of each non-reference TRP is less than a number of bits of a time_diff field representing the reference UERx-rx of the reference TRP.

### Claim 16

A user equipment (UE) comprising:
a transceiver; and
a processor communicatively coupled to a memory and the transceiver, wherein the processor is configured to:
receive, via the transceiver, a plurality of downlink reference signals (DL RSs) from a plurality of transmission reception points (TRPs);
transmit, via the transceiver, a corresponding plurality of uplink reference signals (UL RSs) to the plurality of TRPs; and
transmit, via the transceiver, a measurement report for the plurality of TRPs to a network entity, wherein the measurement report is generated based on one or more numerology factors, wherein the measurement report includes a receive-transmit (Rx-Tx) time difference for at least two TRPs of the plurality of TRPs, and wherein a step size for reporting the Rx-Tx time difference is based on a time unit Tc and the one or more numerology factors.

### Claim 17 (depends on 16)

The UE of claim 16, wherein the Rx-Tx time difference for each TRP is denoted as UERx-Tx,k (time_diff) for each TRP k of the plurality of TRPs, where k is an integer, is defined as TUE,Rx,k−TUE,Tx,k in which TUE,Rx,k is a UE received timing of a downlink (DL) radio subframe from the TRP k, and TUE,Tx,k is the UE transmit time of corresponding uplink (UL) radio subframe to the TRP k.

### Claim 18 (depends on 16)

The UE of claim 16, wherein each DL RS is a positioning reference signal (PRS) and each UL RS is a sounding reference signal (SRS) for positioning.

### Claim 19 (depends on 16)

The UE of claim 16, wherein a numerology factor of the one or more numerology factors of a TRP k of the plurality of TRPs, where k is an integer, is configured separately from configuring of a subcarrier spacing (SCS) of a DL RS received from the TRP k and independent of a SCS of a UL RS transmitted to the TRP k.

### Claim 20 (depends on 16)

The UE of claim 16, wherein a numerology factor of the one or more numerology factors of a TRP k of the plurality of TRPs, where k is an integer, is determined based on at least one of one or more characteristics of a DL RS received from the TRP k or one or more characteristics a UL RS transmitted to the TRP k.

### Claim 21 (depends on 20)

The UE of claim 20, wherein the numerology factor of the TRP k is determined:
based on a larger subcarrier spacing (SCS) of the DL RS and the UL RS,
based on a smaller subcarrier spacing (SCS) of the DL RS and the UL RS,
based on a bandwidth of the DL RS or a bandwidth of the UL RS,
as a function of min(the bandwidth of the DL RS, the bandwidth of the UL RS), or
as a function of max(the bandwidth of the DL RS, the bandwidth of the UL RS).

### Claim 22 (depends on 16)

The UE of claim 16, wherein a same numerology factor is assigned for all TRPs.

### Claim 23 (depends on 16)

The UE of claim 16, wherein the measurement report includes, for a TRP k, of the plurality of TRPs, where k is an integer, a Rx-Tx time difference field configured to hold a Rx-Tx time difference of the TRP k, and
wherein for at least one TRP n, of the plurality of TRPs, where n is an integer, an entire width of a Rx-Tx time difference field for TRP n is used to hold a Rx-Tx time difference of the TRP n.

### Claim 24 (depends on 16)

The UE of claim 16, wherein the processor configured to generate the measurement report further comprises the processor being configured to:
determine one or moreTRP groups;
determine, for each TRP group, a reference TRP having a Rx-Tx time difference (UERx-Tx) as a reference UERx-Tx for each TRP group; and
determine, for each non-reference TRP of each TRP group, a differential UERx-Tx for each non-reference TRP from the reference UER,Tx of each TRP group.

### Claim 25 (depends on 24)

The UE of claim 24, one or more TRP groups are determined such that within each TRP group, a numerology factor of the one or more numerology factors is a same value for all member TRPs of each TRP group.

### Claim 26 (depends on 24)

The UE of claim 24, wherein the one or more TRP groups along with the reference TRP of each TRP group are explicitly configured.

### Claim 27 (depends on 24)

The UE of claim 24, for at least one TRP group of the one or more TRP groups at least one of:
all member TRPs transmit positioning reference signals (PRSs) on a same slot,
all member TRPs transmit positioning reference signals (PRSs) on a same frame, or
all member TRPs transmit positioning reference signals (PRSs) on same symbols.

### Claim 28 (depends on 24)

The UE of claim 24, wherein the one or more TRP groups are determined such that for at least one TRP group of the one or more TRP groups, a sounding reference signal (SRS) configuration is associated with member TRPs of the at least one TRP group.

### Claim 29 (depends on 24)

The UE of claim 24, wherein the one or more TRP groups are determined based on at least one of timing advance (TA) commands or different timing advance groups (TAGs).

### Claim 30 (depends on 24)

The UE of claim 24, wherein a number of bits for representing the differential UERx-Tx of each non-reference TRP is less than a number of bits of a time_diff field representing the reference UERx-Tx of the reference TRP.

### Claim 31

A user equipment (UE) comprising:
means for receiving a plurality of downlink reference signals (DL RSs) from a plurality of transmission reception points (TRPs);
means for transmitting a corresponding plurality of uplink reference signals (UL RSs) to the plurality of TRPs; and
means for transmitting a measurement report for the plurality of TRPs to a network entity, wherein the measurement report is generated based on one or more numerology factors, wherein the measurement report includes a receive-transmit (Rx-Tx) time difference for at least two TRPs of the plurality of TRPs, and wherein a step size for reporting the Rx-Tx time difference is based on a time unit Tc and the one or more numerology factors.

### Claim 32 (depends on 31)

The UE of claim 31, wherein the Rx-Tx time difference for each TRP is denoted as UERx-Tx,k (time_diff) for each TRP k of the plurality of TRPs, where k is an integer, is defined as TUE,Rx,k−TUE,Tx,k in which TUE,Rx,k is a UE received timing of a downlink (DL) radio subframe from the TRP k, and TUE,Tx,k is the UE transmit time of corresponding uplink (UL) radio subframe to the TRP k.