Sidelink Positioning Reference Signal Slot Format
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Solution Overview
Problem
Current wireless communication systems, particularly in the context of 5G New Radio (NR), face challenges in efficiently managing and transmitting sidelink positioning reference signals (PRS) between devices, which is crucial for accurate positioning and communication in scenarios like vehicle-to-everything (V2X) applications.
Innovation Solution
The proposed solution involves a method where a sidelink device receives a sidelink transmission with a configured sidelink slot format, including allocated bandwidth for PRS. The device then transmits or measures one or more PRS, ensuring they are frequency division multiplexed with other symbols, such as those allocated to the physical sidelink control channel (PSCCH).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PRS are transmitted with full allocated sidelink slot bandwidth, then positioning accuracy is improved, but resource conflict with control channels increases
Solution Approach 1:
The patent divides the sidelink slot into multiple symbol periods, allocating different symbols to PRS transmission while other symbols carry control channels like PSCCH. This temporal segmentation allows PRS to achieve full bandwidth positioning accuracy without conflicting with control channel resources, as they occupy different time resources within the same slot.
2Reliability
If multiple PRS sets are transmitted in different symbols, then positioning reliability is improved, but transmission complexity increases
Solution Approach 1:
The patent introduces a time dimension by transmitting multiple PRS sets across different symbol periods within a single slot. This multi-symbol approach provides redundancy and improves positioning reliability through diverse measurement opportunities, while the structured format keeps transmission complexity manageable through standardized procedures.
Data Source
AI summary
In an aspect, a first sidelink device may receive a sidelink transmission having a configured sidelink slot format, wherein the configured sidelink slot format includes an allocated sidelink slot bandwidth spanning a set of one or more contiguous subchannels, a first set of symbols allocated to at least a physical sidelink control channel (PSCCH), and a second set of symbols allocated to a first set of one or more positioning reference signals (PRS), wherein the first set of one or more PRS are assigned a bandwidth at least equal to the allocated sidelink slot bandwidth. The first sidelink device may transmit or measure one or more PRS of the first set of one or more PRS.