Sidelink Synchronization via Intermediary Reference Signals
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Solution Overview
Problem
In wireless communication systems, particularly in sidelink communication, determining synchronization with a synchronization reference source is complex when the synchronization quality is low, requiring a method to simplify the process of searching for a new synchronization reference source.
Innovation Solution
A method where a UE receives information related to a synchronization source from another device and performs synchronization based on a reference signal from that device, using a pre-configured synchronization source with the highest priority.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UE searches for a completely asynchronous new synchronization reference source when synchronization quality is low, then synchronization reliability is improved, but device complexity and processing time increase significantly
Solution Approach 1:
The patent introduces an intermediary approach by using a partially asynchronous synchronization method. Instead of searching for completely asynchronous sources, the UE uses a reference signal from another UE that is partially synchronized to the same synchronization source. This intermediary synchronization state reduces the search complexity while maintaining adequate synchronization reliability for sidelink communication.
Solution Approach 2:
The patent applies partial action by not requiring complete asynchronous synchronization. The UE performs partial synchronization using reference signals from other UEs, which is sufficient for sidelink communication requirements. This partial synchronization approach reduces the complexity of the synchronization search process while maintaining the necessary reliability.
2Measurement precision
If a UE performs complete asynchronous synchronization search, then synchronization accuracy is improved, but time consumption and productivity decrease
Solution Approach 1:
The patent uses partial synchronization action where the UE achieves sufficient synchronization accuracy for sidelink communication without performing a complete asynchronous search. By using reference signals from other UEs that are partially synchronized to the same source, the system achieves adequate precision while significantly reducing the time required for synchronization.
Solution Approach 2:
The patent applies preliminary action by utilizing reference signals that are already partially synchronized to a common source. Other UEs have performed preliminary synchronization work, and the target UE can leverage this existing synchronization state, avoiding the need to perform a complete asynchronous search from scratch.
3Ease of operation
If a UE uses pre-configured synchronization source with highest priority, then ease of operation is improved, but adaptability to different synchronization conditions decreases
Solution Approach 1:
The patent introduces dynamic adaptability by allowing the UE to switch between pre-configured synchronization sources and other available reference signals based on current synchronization conditions. The system dynamically selects the most appropriate synchronization source, maintaining ease of operation through automated selection while improving adaptability to different synchronization scenarios.
Solution Approach 2:
The patent enhances universality by making the synchronization mechanism work with multiple types of sources - both pre-configured sources and reference signals from other UEs. The synchronization system can universally handle different synchronization conditions by accepting various source types, improving both ease of operation and adaptability.
Data Source
AI summary
Proposed is a method for performing wireless communication by a first device. The method can comprise steps in which the first device receives from a second device a first physical sidelink control channel (PSCCH) or a first physical sidelink shared channel (PSSCH) comprising information relating to a second synchronization source, determines synchronization of the second device on the basis of the information relating to the second synchronization source, and performs the synchronization of the second device on the basis of a reference signal of the first PSCCH or first PSSCH. For example, the second synchronization source can comprise a synchronization source having a highest priority configured beforehand with respect to the second device.