# US 12,015,958 B2 · UE, network node and method for enabling GNSS measurements

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- Number: US 12,015,958 B2
- Document ID: US12015958B2
- Status: Granted
- Kind: B2
- Application number: 17/423,997
- Filed: 2019-12-23
- Published: 2022-03-31
- Granted: 2024-06-18
- Earliest claimed: 2019-02-07
- Assignees: Telefonaktiebolaget LM Ericsson (publ)
- Applicants: Telefonaktiebolaget LM Ericsson (publ)
- Inventors: Olof Liberg; Henrik Rydén; Jonas Sedin; Sebastian Euler; Xingqin Lin
- Web page: https://patentgrep.com/patent/US12015958B2

## CPC

- G01S 19/14: specially adapted for specific applications
- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- H04W 36/00837: {Determination of triggering parameters for hand-off}
- H04W 36/322: {by location data}
- H04W 36/328: {by altitude}
- H04W 60/04: using triggered events
- H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management
- H04W 84/06: Airborne or Satellite Networks (space-based or airborne stations H04B7/185)
- 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
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

The present disclosure relates to a method performed by a UE for enabling GNSS measurements. The UE and a network node are included in a NR communications network, and the NR communications network includes a NTN component. The UE performs a GNSS measurement according to a rule and using a GNSS receiver included in the UE. At least one of a UE position and an absolute time is an output of the GNSS measurement or is derivable from the GNSS measurement.

## Claims

### Claim 1

A User Equipment, UE, for enabling Global Navigation Satellite System, GNSS, measurements, the UE and a network node being comprised in a New Radio, NR, communications network, and the NR communications network comprising a Non-Terrestrial Network, NTN, component, the UE being configured to:
perform a GNSS measurement according to a rule and using a GNSS receiver comprised in the UE, wherein at least one of a UE position and an absolute time is an output of the GNSS measurement or is derivable from the GNSS measurement, the rule being that the GNSS measurement is performed with a periodicity associated with at least one of:
a Discontinuous Reception, DRX, cycle;
an enhanced Discontinuous Reception, eDRX, cycle; and/or
a Tracking Area Update, TAU, timer; and
a Radio Access Network based Notification Area Update, RNAU, timer,
the rule being that the GNSS measurement is performed with a periodicity when the UE is in idle mode.

### Claim 2 (depends on 1)

The UE according to claim 1, wherein the UE is adapted configured to:
obtain, from the network node, information indicating geographical cell boundaries defining the NR communications network;
determine the UE's distance d to an edge of the currently camped on cell;
determine, based on the distance d and the UE's velocity v, a time t until a next occasion for performing the GNSS measurement: and
wherein the rule is that the GNSS measurement is performed at the determined time.

### Claim 3 (depends on 1)

The UE according to claim 1, wherein the rule is that the GNSS measurement is performed when triggered by an event.

### Claim 4 (depends on 3)

The UE according to claim 3, wherein the event is at least one of:
that a UE selects a new cell that does not belong to at least one tracking area to which the UE is registered;
that the UE selects a new cell that does not belong to the configured Radio Access Network, RAN,-based Notification Area, RNA;
receipt of a handover command from the network node;
that a conditional handover triggering condition is fulfilled; that a beam failure recovery procedure is triggered; and
that a new cell that does not belong to any of a current timing advance groups is activated.

### Claim 5

A method performed by a User Equipment, UE, for enabling Global Navigation Satellite System, GNSS, measurements, the UE and a network node being comprised in a New Radio, NR, communications network, and the NR communications network comprises a Non-Terrestrial Network, NTN, component, the method comprising:
performing a GNSS measurement according to a rule and using a GNSS receiver comprised in the UE, at least one of a UE position and an absolute time being one of an output of the GNSS measurement and derivable from the GNSS measurement, the rule being that the GNSS measurement is performed with a periodicity associated with at least one of:
a Discontinuous Reception, DRX, cycle;
an enhanced Discontinuous Reception, eDRX, cycle;
a Tracking Area Update, TAU, timer; and
a Radio Access Network based Notification Area Update, RNAU, timer,
the rule being that the GNSS measurement is performed with a periodicity when the UE is in idle mode.

### Claim 6 (depends on 5)

The method according to claim 5, wherein the method further comprises:
obtaining, from the network node, information indicating geographical cell boundaries defining the NR communications network;
determining the UE's distance d to an edge of the currently camped on cell;
determining, based on the distance d and the UE's velocity v, a time t until a next occasion for performing the GNSS measurement: and
wherein the rule is that the GNSS measurement is performed at the determined time.

### Claim 7 (depends on 5)

The method according to claim 5, wherein the rule is that the GNSS measurement is performed when triggered by an event.

### Claim 8 (depends on 7)

The method according to claim 7, wherein the event is at least one of:
that the UE selects a new cell that does not belong to at least one tracking area to which the UE is registered;
that the UE selects a new cell that does not belong to the configured Radio Access Network, RAN, based Notification Area, RNA;
receipt of a handover command from the network node;
that a conditional handover triggering condition is fulfilled;
that a beam failure recovery procedure is triggered; and
that a new cell that does not belong to any of a current timing advance groups is activated.

### Claim 9

A non-transitory computer storage medium storing a computer program comprising instructions which, when executed on at least one processor, cause the at least one processor to:
perform a Global Navigation Satellite System, GNSS, measurement according to a rule and using a GNSS receiver comprised in a User Equipment, UE, at least one of a UE position and an absolute time being one of an output of the GNSS measurement and derivable from the GNSS measurement, the rule being that the GNSS measurement is performed with a periodicity associated with at least one of:
a Discontinuous Reception, DRX, cycle;
an enhanced Discontinuous Reception, eDRX, cycle;
a Tracking Area Update, TAU, timer; and
a Radio Access Network based Notification Area Update, RNAU, timer,
the rule being that the GNSS measurement is performed with a periodicity when the UE is in idle mode.