Terminal Device GNSS Location Validity Management in NTN

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Solution Overview

Problem

In non-terrestrial network (NTN) systems, terminal devices cannot perform GNSS measurements while in a connected state due to the simultaneous operation constraint between GNSS and communication modules, which affects network scheduling.

Innovation Solution

A communication method and apparatus that allow a terminal device to perform GNSS measurement and transmit valid GNSS location information to a network device, even while in a connected state, by using a timer to manage GNSS location validity and compensating for resource offsets.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the terminal device performs GNSS measurement while in a connected state, then the GNSS location can be updated timely, but the communications module cannot operate simultaneously

Engineering Contradiction:
ImproveGNSS location accuracyVSAvoidcommunication scheduling efficiency
Core Design Contradiction:
Measurement precisionVSProductivity

Solution Approach 1:

The terminal device performs GNSS measurement in advance during idle or inactive states, stores the obtained GNSS location information, and then uses this pre-obtained information during connected states for communication scheduling, thereby resolving the conflict between GNSS measurement and communication operations

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts the operational state of the terminal device by transitioning between idle, connected, and GNSS measurement modes, allowing the terminal to perform GNSS measurements when communication is not active and use the obtained location information when communication is needed

Inventive Principle:
Principle #15Dynamics

2Reliability

If the terminal device disables the communications module to perform GNSS measurement, then GNSS measurement can be conducted, but network scheduling is affected

Engineering Contradiction:
ImproveGNSS measurement reliabilityVSAvoidscheduling time loss
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The terminal device performs GNSS measurement in advance during idle or inactive states, stores the obtained GNSS location information, and then uses this pre-obtained information during connected states for communication scheduling, thereby resolving the conflict between GNSS measurement and communication operations

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The network device receives GNSS location information from the terminal device and uses this feedback information to adjust communication scheduling parameters, allowing the system to optimize resource allocation based on the terminal's location status without requiring continuous GNSS measurements during active communication

Inventive Principle:
Principle #23Feedback

Data Source

PatentUS20250039834A1Communication method and communications apparatus
Publication Date: 2025.01.30 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD
  • US20250039834A1 patent drawing
  • US20250039834A1 patent drawing
  • US20250039834A1 patent drawing

AI summary

A communication method and a communications apparatus are provided. The method includes: performing, by a terminal device, global navigation satellite system GNSS measurement to obtain a GNSS location of the terminal device, where the terminal device is in a connected state; and transmitting, by the terminal device, first information to a network device, where the first information is used to indicate that the GNSS location is valid.