Terminal Synchronization Source Selection for 5G NR V2X
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Solution Overview
Problem
The challenge in 5G NR V2X networks is to support synchronization of resources with different sub carrier spacings (SCSs), as existing technologies do not effectively manage synchronization across multiple SCSs and synchronization sources, including LTE, 5G, GNSS, and communication nodes.
Innovation Solution
A synchronization method and terminal apparatus that determine and utilize synchronization sources from LTE, 5G, GNSS, or communication nodes based on specific parameters like receiving power, synchronization offset, frequency band configuration, and reliability to improve synchronization accuracy and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple synchronization sources (LTE, 5G, GNSS, communication nodes) are supported simultaneously, then synchronization adaptability across different networks is improved, but system complexity increases
Solution Approach 1:
The patent segments the synchronization source selection into distinct types (LTE network base station, 5G network base station, GNSS, and communication node). Each type has specific determination methods and parameters, dividing the complex multi-source synchronization problem into manageable segments that can be handled independently according to network type and availability.
Solution Approach 2:
The synchronization source determination is made dynamic rather than static. The terminal apparatus can adaptively select from multiple synchronization sources based on real-time conditions including receiving power, synchronization offset, frequency band configuration, and reliability parameters. This dynamic selection allows the system to respond to changing network conditions while maintaining synchronization accuracy.
2Measurement precision
If synchronization source selection is based on multiple parameters (receiving power, synchronization offset, frequency band, reliability), then synchronization precision is improved, but determination complexity increases
Solution Approach 1:
The patent utilizes multiple parameters (receiving power, synchronization offset, frequency band configuration, and reliability) to determine the optimal synchronization source. By changing and comparing these parameters across different synchronization sources, the system achieves high synchronization precision. Each parameter provides a different dimension of evaluation, allowing comprehensive assessment of synchronization source quality.
Solution Approach 2:
The determination process incorporates feedback mechanisms where the terminal apparatus evaluates synchronization sources based on measured parameters and selects the optimal source. The system continuously monitors synchronization quality and can re-evaluate sources when conditions change, using feedback from the measured parameters to maintain optimal synchronization precision.
3Reliability
If the terminal apparatus determines synchronization source from multiple sources, then synchronization reliability is improved, but processing time increases
Solution Approach 1:
The patent employs preliminary action by pre-configuring the terminal apparatus with information about available synchronization sources and their types. The system prepares determination criteria and parameters in advance, so when synchronization is needed, the terminal can quickly evaluate available sources using pre-established rules and parameters, reducing processing time while maintaining reliability.
Solution Approach 2:
Different determination methods and parameters are applied locally to each synchronization source type based on its characteristics. LTE base stations use specific parameters, 5G base stations use others, GNSS has its own determination method, and communication nodes have tailored evaluation criteria. This localized approach allows efficient processing for each source type while ensuring overall synchronization reliability.
Data Source
AI summary
Disclosed are a synchronization method and a terminal apparatus resolving the issue of how to support synchronization of resources having different SCSs. The synchronization method includes: a terminal apparatus determining a type of synchronization sources, the synchronization sources including one or more combinations of: a base station in a Long Term Evolution (LTE) network, a base station in the Fifth Generation Mobile Communication Technology (5G) network, a Global Navigation Satellite System (GNSS) and a communication node; the terminal apparatus determining, from one or more synchronization sources matching the type, a synchronization source of the terminal apparatus; and the terminal apparatus synchronizing with the determined synchronization source.