System Information Update Timing in Satellite Networks

Solution Overview

Problem

In satellite communication systems, there is a period of ambiguity during system information updates, which can lead to conflicts in data transmission between user equipment and network devices, especially in non-terrestrial networks.

Innovation Solution

The method involves transmitting updated system information, including an updated cell-specific offset, from a network device to user equipment, where the user equipment determines and applies the effective time for the updated information, ensuring consistent understanding and preventing data transmission conflicts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If system information is updated in satellite communication, then communication reliability is improved, but data transmission conflicts occur during the ambiguity period

Engineering Contradiction:

Improvecommunication reliabilityVSAvoiddata transmission conflicts

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent applies preliminary action by explicitly defining the effective time for updated system information before conflicts occur. The network device indicates the effective time in advance, and the user equipment proactively determines and applies the updated information at the correct timing, preventing data transmission conflicts before they happen rather than reacting after conflicts occur.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback mechanisms where the network device monitors whether the user equipment has correctly determined and applied the effective time for updated system information. This feedback loop ensures that the user equipment and network device maintain consistent understanding of timing information, allowing for correction of any discrepancies and prevention of data transmission conflicts.

Inventive Principle:

Principle #23Feedback

2Speed

If updated system information is applied immediately, then response speed is improved, but data transmission conflicts arise due to timing ambiguity

Engineering Contradiction:

Improveresponse speedVSAvoiddata transmission conflicts

Core Design Contradiction:

SpeedVSObject-generated harmful factors

Solution Approach 1:

The patent applies preliminary action by explicitly defining the effective time for updated system information before conflicts occur. The network device indicates the effective time in advance, and the user equipment proactively determines and applies the updated information at the correct timing, preventing data transmission conflicts before they happen rather than reacting after conflicts occur.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback mechanisms where the network device monitors whether the user equipment has correctly determined and applied the effective time for updated system information. This feedback loop ensures that the user equipment and network device maintain consistent understanding of timing information, allowing for correction of any discrepancies and prevention of data transmission conflicts.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250159632A1Methods and apparatuses for communicating system information, and readable storage mediums

Publication Date: 2025.05.15 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A method for receiving system information is performed by a user equipment, and includes: receiving updated system information; determining effective time for the updated system information; and starting to apply the updated system information at the effective time.