Sidelink PRS Sequence ID Signaling for Privacy-Aware Positioning
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Solution Overview
Problem
The configuration manner of sidelink positioning reference signal (PRS) sequence identifiers in sidelink (SL) positioning is not specified, hindering the flexibility in meeting different privacy requirements.
Innovation Solution
A method to flexibly configure sidelink positioning reference signal sequence identifiers through indication information, allowing for different configuration manners based on first-type and second-type identifiers, enabling private and non-private communication scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed configuration manner for SL-PRS sequence ID is used, then the system complexity is reduced, but the adaptability to different privacy requirements deteriorates
Solution Approach 1:
The patent implements dynamic configuration of SL-PRS sequence ID by introducing indication information that can switch between different configuration manners (first-type and second-type identifiers). This allows the system to adapt to different privacy requirements dynamically rather than being fixed, resolving the contradiction between adaptability and complexity by making the configuration flexible only when needed.
Solution Approach 2:
The patent changes the parameter of sequence ID configuration by introducing two distinct types (first-type and second-type identifiers) with different configuration manners. This parameter change enables the system to meet different privacy requirements while maintaining manageable complexity through clear differentiation between identifier types.
2Adaptability or versatility
If flexible configuration of SL-PRS sequence ID is implemented, then the adaptability to different privacy requirements is improved, but the device complexity increases
Solution Approach 1:
The patent segments the sequence ID configuration into two distinct types (first-type and second-type identifiers) with different configuration manners. This segmentation allows flexible adaptation to different privacy requirements while managing complexity by creating clear, separate configuration paths for each type rather than a single complex unified system.
Solution Approach 2:
The patent creates a universal configuration framework that can handle both first-type and second-type identifiers through a common indication information mechanism. This multi-functionality approach allows the same basic structure to serve different privacy requirements, achieving flexibility without proportionally increasing system complexity.
3Measurement precision
If indication information is included in sidelink control information, then the positioning accuracy is improved, but the signaling overhead increases
Solution Approach 1:
The patent applies partial action by including indication information only when needed to switch between different sequence ID configuration manners. Rather than always transmitting full configuration details, the system uses compact indication information to trigger appropriate configuration, achieving positioning accuracy while minimizing signaling overhead through selective information transmission.
Data Source
AI summary
A sidelink communication method and an apparatus are provided. The method includes: A first terminal device sends sidelink control information to a second terminal device, where the sidelink control information includes indication information used to determine the sidelink positioning reference signal sequence identifier. The first terminal device generates a sidelink positioning reference signal based on the sidelink positioning reference signal sequence identifier, and sends the sidelink positioning reference signal to the second terminal device. The second terminal device determines the sidelink positioning reference signal sequence identifier based on the indication information, and receives the sidelink positioning reference signal based on the sidelink positioning reference signal sequence identifier. The sidelink positioning reference signal sequence identifier is a first-type identifier or a second-type identifier, and configuration manners of the first-type identifier and the second-type identifier are different.


