NR V2X Sidelink Synchronization Reference Selection Under Priority Rules
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Solution Overview
Problem
User equipment (UE) faces challenges in efficiently selecting a synchronization reference for sidelink communication, which is crucial for vehicle-to-everything (V2X) communication, particularly in next-generation radio access technologies like NR, due to the increasing demand for enhanced mobile broadband communication and varying communication scenarios.
Innovation Solution
The UE is equipped with a method to select a synchronization reference from multiple sources, including global navigation satellite systems (GNSS), base stations, and other UEs, prioritizing synchronization based on priority information and direct synchronization methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE selects synchronization reference based on multiple sources (GNSS, base station, other UEs), then the reliability of synchronization is improved, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting synchronization priority based on service type parameters. Different service types (e.g., V2V, V2I, V2P) are assigned different priority rules, allowing the UE to adapt the synchronization selection process to specific service requirements rather than using a fixed complex algorithm for all scenarios
Solution Approach 2:
The patent segments the synchronization selection process into distinct service-type-specific procedures. By dividing the overall synchronization task into service-specific segments, each with its own priority rules and reference source preferences, the system reduces the complexity of making a single universal decision while maintaining high reliability through service-appropriate synchronization sources
2Adaptability or versatility
If the UE prioritizes synchronization based on service type, then the adaptability to different V2X scenarios is improved, but the difficulty of detecting and measuring synchronization requirements increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring priority rules and synchronization preferences for different service types before actual synchronization is needed. The UE and network are pre-provided with service-type-specific synchronization parameters, so when synchronization is required, the UE can directly apply the appropriate pre-determined rules without complex real-time analysis
Data Source
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AI summary
Provided are a method by which a first device performs wireless communication, and a device for supporting same are provided. The method can comprise the steps of: receiving information related to a sidelink (SL) bandwidth part (BWP); receiving, from a network, SL synchronization priority order information set through global navigation satellite systems (GNSS)-based synchronization; receiving, from the network, information for indicating whether selection of a base station (BS)-related synchronization reference is disabled; detecting, on the basis of the information for indicating that the selection of the base station-related synchronization reference is disabled, a synchronization signal transmitted through the SL BWP by a GNSS-related synchronization reference or other UEs; and performing synchronization with respect to the GNSS-related synchronization reference or one synchronization reference from among the other UEs on the basis of the synchronization signal.