# US 12,119,849 B2 · Timing-based user equipment mobility for transparent satellites

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- Number: US 12,119,849 B2
- Document ID: US12119849B2
- Status: Granted
- Kind: B2
- Application number: 17/607,772
- Filed: 2020-05-01
- Published: 2022-07-07
- Granted: 2024-10-15
- Earliest claimed: 2019-05-02
- Assignees: Nokia Technologies Oy
- Applicants: Nokia Technologies Oy
- Inventors: Mads Lauridsen; Jeroen Wigard; Rafhael Amorim; István Z. Kovacs
- Web page: https://patentgrep.com/patent/US12119849B2

## CPC

- H04B 7/18508: {with satellite system used as relay, i.e. aeronautical mobile satellite service}
- H04W 36/36: by user or terminal equipment
- H04W 56/0045: {compensating for timing error by altering transmission time}
- H04W 56/0065: {using measurement of signal travel time}
- H04W 84/06: Airborne or Satellite Networks (space-based or airborne stations H04B7/185)
- H04B: TRANSMISSION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

According to certain embodiments, a method and apparatus may include transmitting, by a first network entity, at least one time-based measurement configuration to a user equipment. The method may further include receiving, by the first network entity, at least one measurement result from the user equipment. The method may further include determining, by the first network entity, whether at least one handover should be performed.

## Claims

### Claim 1

An apparatus, comprising:
at least one processor; and
at least one memory including computer program code;
the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:
receive at least one time-based measurement configuration, wherein the at least one time-based measurement result is received by the apparatus when a time difference measured by a user equipment exceeds or does not exceed a predetermined threshold, and wherein the at least one measurement result includes at least a first absolute starting time of a first system frame number, at least a first absolute starting time of a second system frame number, and at least one offset value;
wherein the at least one time-based measurement configuration is configured to cause the apparatus to measure:
at least one timing measurement of at least one absolute starting time of a system frame number associated with one or more of a first network entity and a second network entity, wherein the system frame number from one or more of the first network entity and a second network entity is not equal, and the offset is signaled as part of the at least one time-based measurement configuration;
at least one timing advance towards at least one connection associated with the first network entity and at least one timing advance towards one connection associated with the second network entity; and
at least one timing measurement associated with coordinated universal time (UTC) time information associated with one or more of the first network entity and the second network entity;
perform at least one measurement based on the at least one time-based measurement configuration, wherein performing comprises:
measuring, based on the received at least one time-based measurement configuration, one or more of at least one absolute starting time of at least one given system frame number associated with the first network entity as observed by the apparatus and at least one absolute starting time of at least one given system frame number associated with a second network entity as observed by the apparatus;
measuring, based on the received at least one time-based measurement configuration, one or more of at least one timing advance towards at least one connection associated with the first network entity as observed by the apparatus and at least one timing advance towards at least one connection associated with the second network entity as observed by the apparatus; and
measuring, based on the received at least one time-based measurement configuration, one or more of at least one timing measurement associated with the UTC information associated with the first network entity as observed by the apparatus and at least one timing measurement associated with the UTC associated with the second network entity as observed by the apparatus;
detect at least one trigger event associated with reporting at least one measurement result; and
transmit at least one measurement result to the first network entity in response to the at least one detected trigger event.