Sidelink Time Sync Reference Selection for Positioning Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G wireless communication systems face challenges in achieving accurate time synchronization for sidelink positioning, which affects the overall positioning accuracy in wireless networks.
Innovation Solution
The proposed solution involves an apparatus and method that allow user equipment to receive information about the priority of a time synchronization reference for sidelink data communications or a request to use a specific time synchronization reference for sidelink positioning. Based on this information, the user equipment determines the appropriate time synchronization reference for sidelink positioning reference signal transmission and performs corresponding measurements or transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment follows legacy synchronization reference priority for sidelink data communications, then data communication reliability is maintained, but positioning accuracy deteriorates due to time synchronization errors
Solution Approach 1:
The patent segments the time synchronization reference selection into different modes: legacy mode for data communications and requested mode for positioning measurements. This allows independent optimization of each function - data communications use established synchronization priorities while positioning uses requested references for accuracy.
Solution Approach 2:
The patent introduces dynamic selection of time synchronization references based on the operational mode. The user equipment dynamically switches between following legacy priorities for data communications and following requested references for positioning, allowing the system to adapt synchronization behavior to current needs.
2Measurement precision
If user equipment uses requested time synchronization reference for positioning, then positioning accuracy is improved, but device complexity increases due to additional determination and measurement procedures
Solution Approach 1:
The network node performs preliminary action by providing advance information about the requested time synchronization reference to the user equipment before positioning measurements are needed. This includes providing reference identification and timing information, which simplifies the UE's subsequent measurement procedures.
Solution Approach 2:
The patent introduces the network node as an intermediary that mediates between positioning requirements and user equipment capabilities. The network node determines which reference to request and provides necessary configuration information, reducing the complexity burden on the UE.
3Measurement precision
If user equipment performs sidelink positioning measurements with requested time synchronization reference, then positioning performance is enhanced, but loss of time increases due to additional synchronization alignment requirements
Solution Approach 1:
The network node performs preliminary synchronization alignment by providing advance information about the requested time synchronization reference. This includes providing reference identification and timing information before measurements are needed, reducing the time required for synchronization alignment during actual positioning operations.
Data Source
AI summary
Embodiments of the invention provide at least for receiving information comprising at least one of a priority of a time synchronization reference (SyncRef) for sidelink data communications or a request of using a SyncRef for sidelink positioning; and determining, based on at least the information, the SyncRef for a sidelink positioning reference signal (PRS) transmission timing, a sidelink PRS reception; and performing at least one sidelink positioning measurement for one or more sidelink PRSs or transmitting information of one or more sidelink PRSs based on the determined SyncRef. Further, determining information comprising at least one of a priority of a SyncRef for sidelink data communications or a request of using a SyncRef for sidelink positioning; and sending towards a network device the configuration for performing at least one sidelink positioning measurement for one or more sidelink PRSs or transmitting one or more sidelink PRSs based on a determined SyncRef.