NR V2X Synchronization via GNSS Loss Prioritization
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Solution Overview
Problem
Current wireless communication systems for vehicle-to-everything (V2X) applications face challenges in achieving robust and efficient sidelink synchronization, particularly in scenarios where Global Navigation Satellite System (GNSS) signals are lost, leading to increased latency and complexity in synchronization procedures.
Innovation Solution
The introduction of new prioritization levels for GNSS-based synchronization and the design of Physical Sidelink Broadcast Channel (PSBCH) for New Radio (NR) V2X communication, which includes preconfiguration of sidelink parameters and automatic gain control (AGC) to simplify synchronization, reduce complexity, and enhance synchronization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional synchronization procedures are used in V2X communication, then synchronization can be achieved, but latency increases and complexity increases when GNSS signals are lost
Solution Approach 1:
The patent applies preliminary action by pre-configuring synchronization parameters and establishing prioritization levels for different synchronization sources before GNSS signal loss occurs. This allows the system to quickly switch to alternative synchronization sources (such as gNB or UE-based synchronization) without undergoing complex selection procedures after signal loss, thereby reducing synchronization latency while maintaining reliability.
2Reliability
If traditional synchronization procedures are used in V2X communication, then synchronization can be achieved, but complexity increases when GNSS signals are lost
Solution Approach 1:
The patent applies segmentation by dividing the synchronization source selection into distinct prioritization levels (e.g., GNSS-based synchronization, gNB-based synchronization, UE-based synchronization). This structured segmentation simplifies the decision-making process by providing a clear hierarchy, reducing the complexity of synchronization procedures while ensuring reliable fallback mechanisms when GNSS signals are lost.
Solution Approach 2:
The patent applies preliminary action by pre-configuring synchronization parameters and establishing prioritization levels for different synchronization sources before GNSS signal loss occurs. This allows the system to quickly switch to alternative synchronization sources (such as gNB or UE-based synchronization) without undergoing complex selection procedures after signal loss, thereby reducing synchronization latency while maintaining reliability.
3Loss of time
If new prioritization levels and preconfiguration are implemented, then synchronization latency is reduced and complexity is reduced, but synchronization efficiency must be enhanced
Solution Approach 1:
The patent applies parameter changes by introducing new prioritization levels and pre-configuring synchronization parameters specific to NR V2X communication. These parameter changes enable the system to quickly adapt to different synchronization scenarios and enhance synchronization efficiency by optimizing the selection and switching between synchronization sources based on pre-defined criteria.
Data Source
AI summary
Sidelink synchronization for new radio vehicle-to-every thing (NR V2X) communication in a wireless communication system may include determining a loss of global navigation satellite system (GNSS) synchronization for a user equipment (UE), attempting a synchronization with a next generation NodeB/eNodeB (gNB/eNB) node for the UE, and determining successful synchronization with the gNB/eNB node for the UE. The successful synchronization may include a gNB/eNB timing aligned with a GNSS timing of the lost GNSS synchronization.