Non-Terrestrial Sync Detection Using Reduced-Content SSBs

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing varying resource demands and latency requirements across different quality-of-service classes, particularly in non-terrestrial networks, leading to inefficiencies in connection establishment and energy consumption.

Innovation Solution

A method involving non-terrestrial radio network nodes broadcasting reduced-content synchronization signal blocks that exclude master information, using idle-mode beams for connection establishment, and incorporating idle-mode uplink resources to facilitate efficient connection setup and energy-saving operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If full synchronization signal blocks with master information are broadcast continuously, then connection establishment reliability is improved, but energy consumption increases

Engineering Contradiction:

Improveconnection establishment reliabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic broadcasting of reduced-content synchronization signal blocks during idle mode, transitioning to full synchronization signal blocks with master information only when connection establishment is required. This periodic alternation between reduced and full content broadcasting reduces overall energy consumption while maintaining connection reliability when needed.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent extracts and removes the master information block from the synchronization signal block during idle mode operations, retaining only the essential synchronization content. This extraction of unnecessary information reduces the broadcast content size and associated energy consumption while preserving the core synchronization function.

Inventive Principle:

Principle #2Taking out (Extraction)

2Use of energy by moving object

If reduced-content synchronization signal blocks are broadcast, then energy consumption is reduced, but connection establishment speed decreases

Engineering Contradiction:

Improveenergy consumptionVSAvoidconnection establishment speed

Core Design Contradiction:

Use of energy by moving objectVSSpeed

Solution Approach 1:

The patent performs preliminary broadcasting of reduced-content synchronization signal blocks that contain pre-configured uplink resource indicators and preamble information. This preliminary action prepares user equipment in advance with necessary connection parameters, enabling faster connection establishment when full synchronization blocks are subsequently transmitted without requiring extensive information gathering.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary reduced-content synchronization signal block that bridges the gap between idle mode operation and full connection establishment. This intermediary block contains essential pointers and indicators that guide user equipment to the appropriate full synchronization blocks, accelerating the transition process while maintaining energy efficiency during idle periods.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If idle-mode beams are used for broadcasting, then resource utilization efficiency is improved, but beam management complexity increases

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoidbeam management complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the broadcasting function into distinct idle-mode beams dedicated to synchronization signal block transmission. By separating idle-mode broadcasting from connected-mode communication functions, the system optimizes resource utilization for each mode while managing beam complexity through functional segmentation rather than requiring complex multi-functional beam management.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250380148A1Two-stage non-terrestrial synchronization signal detection

Publication Date: 2025.12.11 DELL PROD LP

AI summary

A non-terrestrial radio network node may broadcast a reduced-content synchronization signal block message, via an idle-mode beam, which may indicate non-terrestrial uplink resources usable by a user equipment to transmit a first preamble or a second preamble indicated by the reduced content message. If the user equipment cannot connect with a terrestrial radio network node upon determining to establish a connection with the non-terrestrial node, the user equipment may transmit a second preamble, responsive to which the non-terrestrial node may broadcast full synchronization signal block information via the idle-mode beam. Alternatively, the user equipment may receive, from a terrestrial node, non-terrestrial minimum system information and non-terrestrial beam information indicative of a refined beam, and may transmit, to the non-terrestrial node, a first preamble, responsive to which the non-terrestrial node may activate the refined beam via which the user equipment may establish a connection according to the non-terrestrial minimum system information.