SSB-Based Network Type Detection During 5G Frequency Sweep
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Solution Overview
Problem
The existing 5G network protocols fail to accurately distinguish between terrestrial and non-terrestrial network types during the frequency sweep stage due to the use of the same frequency band, leading to ambiguity in network type identification.
Innovation Solution
A method and apparatus that utilize synchronization signal blocks (SSBs) including primary synchronization signals (PSS), secondary synchronization signals (SSS), physical broadcast channels (PBCH), and frame structures to differentiate between new radio (NR) and non-terrestrial network (NTN) types by employing distinct sequences, interleaving, and pseudo-random sequences for blind detection and descrambling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the same frequency band and frequency are used for NR and NTN, then frequency resource utilization is improved, but network type identification capability deteriorates
Solution Approach 1:
The patent segments the frequency sweep stage into multiple detection opportunities, where the terminal device performs repeated measurements of synchronization signal blocks (SSBs) at different time instances. By dividing the identification process into multiple stages with accumulated measurement results, the system can distinguish between NR and NTN network types even when they occupy the same frequency resources.
Solution Approach 2:
The patent applies preliminary action by having the terminal device perform frequency sweeps and SSB measurements in advance before actual data transmission begins. The device accumulates measurement results during this preliminary phase, establishing a baseline for network type identification that enables subsequent communication to proceed with proper network type awareness.
2Productivity
If frequency sweep stage uses same frequency for different network types, then spectrum efficiency is improved, but access network determination accuracy deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the terminal device continuously monitors and measures SSBs during the frequency sweep stage, compares measurement results against expected patterns for different network types, and uses this feedback to determine the correct access network. The system refines its determination through repeated measurement cycles, improving accuracy while maintaining spectrum efficiency.
Solution Approach 2:
The patent introduces dynamic measurement strategies where the terminal device adjusts its detection approach based on observed signal characteristics. The device can dynamically change measurement parameters, detection thresholds, and analysis methods to adapt to the specific conditions of NR or NTN networks, thereby maintaining high determination accuracy despite using the same frequency resources.
Data Source
AI summary
This application provides a communication method and apparatus and a computer-readable storage medium. The method includes: receiving one or more synchronization information blocks SSBs; determining, based on a first SSB and/or a second SSB, a network type corresponding to the one or more SSBs; and determining an access network based on the network type. According to technical solutions provided in this application, a network type of an access network can be accurately identified in a frequency sweep stage.