Offset-Based Sidelink Positioning Reference Signal Allocation
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Solution Overview
Problem
In the New Radio (NR) vehicle-to-everything (V2X) system, sidelink positioning reference signals (S-PRS) cause interference with other channels and signals when they occupy the same resource elements, leading to degraded positioning performance and communication efficiency.
Innovation Solution
The method involves not transmitting S-PRS on resources occupied by sidelink physical channels, reference signals, synchronization signals, AGC, or GP when collisions occur, using staggered interleaved transmission and configuration signaling to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If S-PRS is transmitted on the same resource elements as other sidelink channels or signals, then spectral efficiency is improved, but positioning performance and communication efficiency are degraded due to interference
Solution Approach 1:
The patent segments the time-frequency resources by introducing offset parameters (timeDomainPositionOffset, frequencyDomainPositionOffset) that divide S-PRS resources into distinct segments separated from other sidelink channels. This segmentation allows S-PRS to occupy specific resource elements without overlapping with PSCCH, PSSCH, or other signals, thereby eliminating interference while maintaining efficient resource utilization.
Solution Approach 2:
The patent applies local quality by configuring S-PRS with specific local resource characteristics through offset parameters. Each S-PRS transmission is locally positioned at specific time-frequency locations determined by the offsets, creating localized quality differences that prevent interference with other channels while optimizing positioning measurement performance at those specific locations.
2Quantity of substance
If S-PRS is transmitted on the same resource elements as other sidelink channels or signals, then resource utilization is improved, but communication efficiency is degraded due to interference
Solution Approach 1:
The patent segments resources to allocate S-PRS in specific time-frequency regions defined by offset parameters, preventing overlap with communication channels while ensuring comprehensive resource utilization. The segmented approach allows S-PRS to occupy previously unused resource elements without interfering with PSCCH, PSSCH, or other communication signals.
Solution Approach 2:
The patent changes the resource allocation parameters by introducing configurable offset values (timeDomainPositionOffset, frequencyDomainPositionOffset) that dynamically adjust S-PRS positioning. This parameter change enables flexible resource utilization where S-PRS can be positioned in different time-frequency locations based on system conditions, maximizing resource usage without causing interference.
3Device complexity
If S-PRS is transmitted without avoiding collisions with other signals, then transmission complexity is reduced, but positioning performance is severely degraded
Solution Approach 1:
The patent applies preliminary action by pre-configuring offset parameters that determine S-PRS resource positions before transmission occurs. These pre-set offsets (timeDomainPositionOffset, frequencyDomainPositionOffset) automatically position S-PRS away from other channels, eliminating the need for complex real-time collision detection and resolution mechanisms while ensuring positioning performance.
Data Source
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AI summary
The present disclosure provides a method for transmitting and receiving a sidelink positioning reference signal and a terminal. The method includes: when a resource occupied by the sidelink positioning reference signal collides with a resource occupied by at least one type of information in a first information set, not transmitting the S-PRS on the collided resource, wherein the first information set includes: at least one of a sidelink physical channel, a sidelink reference signal, a sidelink synchronization signal, a sidelink synchronization signal block, an automatic gain control information and a guard period information.