# US 12,192,938 B2 · Non-terrestrial networks

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- Number: US 12,192,938 B2
- Document ID: US12192938B2
- Status: Granted
- Kind: B2
- Application number: 17/441,011
- Filed: 2020-03-19
- Published: 2022-06-02
- Granted: 2025-01-07
- Earliest claimed: 2019-03-29
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Hyunseok Ryu; Shangbin Wu; Yinan Qi
- Web page: https://patentgrep.com/patent/US12192938B2

## CPC

- H04W 56/0045: {compensating for timing error by altering transmission time}
- H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]}
- H04B 7/18504: {Aircraft used as relay or high altitude atmospheric platform}
- H04B 7/1851: {Systems using a satellite or space-based relay (H04B7/18508, H04B7/18521 take precedence; providing specific services H04B7/18523 - H04B7/18576)}
- H04L 1/0003: {by switching between different modulation schemes}
- H04W 84/06: Airborne or Satellite Networks (space-based or airborne stations H04B7/185)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Disclosed is a method of operating a non-terrestrial network comprising the step of: configuring a Timing Advance, TA, value comprising a cell-specific common TA and a residual TA, wherein the cell-specific common TA is broadcast by a satellite in connection with a particular cell.

## Claims

### Claim 1

A method performed by a user equipment (UE) in a non-terrestrial network (NTN), the method comprising:
receiving, from a base station via a satellite, first information associated with a first timing advance (TA) common for a cell;
determining a second TA based on a position of the UE;
performing, based on the first TA and the second TA, uplink transmission to the base station;
receiving, from the base station via the satellite, second information on a threshold for a channel quality indicator (CQI) report disabling mechanism; and
determining whether the CQI report is disabled or not based on a comparison between the threshold and a measured propagation delay between the UE and the satellite.

### Claim 2 (depends on 1)

The method of claim 1, wherein the CQI report is disabled, in case that the measured propagation delay between the UE and the satellite is larger than the threshold.

### Claim 3

A method performed by a base station in a non-terrestrial network (NTN), the method comprising:
transmitting, to a user equipment (UE) via a satellite, first information associated with a first timing advance (TA) common for a cell;
performing, based on the first TA and a second TA, uplink reception from the UE; and
transmitting, to the UE via the satellite, second information on a threshold for a channel quality indicator (CQI) report disabling mechanism,
wherein whether the COI report is disabled or not is determined based on a comparison between the threshold and a measured propagation delay between the UE and the satellite, and
wherein the second TA is determined based on a position of the UE.

### Claim 4 (depends on 3)

The method of claim 3, wherein the CQI report is disabled, in case that the measured propagation delay between the UE and the satellite is larger than the threshold.

### Claim 5

A user equipment (UE) in a non-terrestrial network (NTN), the UE comprising:
a transceiver; and
a processor configured to:
receive, from a base station via a satellite, first information associated with a first timing advance (TA) common for a cell,
determine a second TA based on a position of the UE,
perform, based on the first TA and the second TA, uplink transmission to the base station,
receive, from the base station via the satellite, second information on a threshold for a channel quality indicator (CQI) report disabling mechanism, and
determine whether the COI report is disabled or not based on a comparison between the threshold and a measured propagation delay between the UE and the satellite.

### Claim 6 (depends on 5)

The UE of claim 5, wherein the CQI report is disabled, in case that the measured propagation delay between the UE and the satellite is larger than the threshold.

### Claim 7

A base station in a non-terrestrial network (NTN), the base station comprising:
a transceiver; and
a processor configured to:
transmit, to a user equipment (UE) via a satellite, first information associated with a first timing advance (TA) common for a cell,
perform, based on the first TA and a second TA, uplink reception from the UE, and
transmit, to the UE via the satellite, second information on a threshold for a channel quality indicator (CQI) report disabling mechanism,
wherein whether the COI report is disabled or not is determined based on a comparison between the threshold and a measured propagation delay between the UE and the satellite, and
wherein the second TA is determined based on a position of the UE.

### Claim 8 (depends on 7)

The base station of claim 7, wherein the CQI report is disabled, in case that the measured propagation delay between the UE and the satellite is larger than the threshold.