Sidelink Positioning Reference Signals With Session Identity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems lack efficient support for sidelink positioning, which is essential for applications like emergency calls, navigation, and asset tracking.
Innovation Solution
The implementation of sidelink positioning reference signals (PRS) with an indication of the identity of the sidelink positioning session and the source identifier, allowing user equipment (UE) to transmit payload-based or sequence-based indications associated with these signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sidelink positioning reference signals are transmitted without session identity and source identifier indications, then the system complexity is reduced, but the positioning accuracy and reliability deteriorate
Solution Approach 1:
The patent combines multiple identification functions into the sidelink positioning reference signal structure by integrating session identity indication and source identifier indication into the PRS transmission. This merging allows receiving UEs to accurately identify positioning sessions and signal sources without requiring separate signaling messages, thereby improving positioning accuracy while controlling system complexity.
Solution Approach 2:
The sidelink positioning reference signal is designed to serve multiple functions simultaneously: it provides positioning measurement references, carries session identity information, and includes source identifier information. This multi-functionality enables the PRS to improve positioning accuracy while avoiding additional dedicated signaling overhead.
2Adaptability or versatility
If payload-based indication is used for session identity and source identifier, then the flexibility and information capacity are improved, but the signaling overhead increases
Solution Approach 1:
The patent merges payload-based indication information with the sidelink positioning reference signal transmission. By combining these elements, the system achieves flexible and capacity-rich indication while avoiding separate dedicated signaling messages, thus controlling signaling overhead.
3Quantity of substance
If sequence-based indication is used for session identity and source identifier, then the signaling overhead is reduced, but the measurement complexity increases
Solution Approach 1:
The patent combines sequence-based indication with the sidelink positioning reference signal by generating or selecting PRS sequences based on session identity and source identifier. This approach reduces signaling overhead while maintaining manageable measurement complexity through standardized sequence generation procedures.
4Adaptability or versatility
If sidelink positioning support is added to wireless communication systems, then the positioning capability is improved, but the system complexity increases
Solution Approach 1:
The patent designs the sidelink positioning reference signal to perform multiple functions within a unified structure: providing positioning measurement references, carrying session identity, and including source identifiers. This multi-functionality enhances positioning capability while avoiding the need for multiple separate signaling mechanisms, thereby controlling system complexity.
Data Source
AI summary
Sidelink (SL) positioning of user equipments (UEs) is supported by providing with SL positioning reference signals (PRS) an indication of the identity of the SL positioning session and the SL PRS source identifier. A UE may transmit a payload-based indication or a sequence-based indication of the identity of the SL positioning session and the source identifier. The pay-load based indication is included in, e.g., a Layer 1 (L1) and/or Layer 2 (L2) control message associated with the SL PRS. The sequence-based indication may be generated using the indication of the identity of the SL positioning session and the source identifier to initialize or seed the generation of the PRS sequence, scramble the PRS sequence, or generate a cover code that is applied to the PRS sequence.