Sidelink Positioning Reference Signals for Out-of-Coverage NR-V2X
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Solution Overview
Problem
Existing communication systems lack clear methods for terminal devices to receive and transmit sidelink positioning reference signals (SL PRS), particularly in scenarios involving network coverage, partial coverage, and out-of-coverage conditions, which hinders accurate positioning and data interaction in systems like NR-V2X.
Innovation Solution
A method for sidelink communication is provided, enabling terminal devices to transmit or receive sidelink reference signals for positioning, and includes a terminal device with a transceiver, memory, and processor configured to perform these operations, along with a chip that invokes programs for the method, supporting various communication systems and scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sidelink positioning reference signals are transmitted without standardized methods, then positioning functionality can be implemented, but positioning accuracy and system reliability deteriorate
Solution Approach 1:
The patent standardizes multiple parameters for SL PRS transmission including time-frequency resource allocation, signal sequence generation, transmission periodicity, and resource element mapping. These parameter standardizations ensure consistent and accurate positioning measurements across different terminal devices and network conditions.
Solution Approach 2:
The patent divides positioning reference signal transmission into distinct standardized components: separate definitions for SL PRS resource allocation, signal structure, transmission timing, and resource element mapping. This segmentation allows each aspect to be optimized independently while maintaining overall system reliability.
2Measurement precision
If clear methods for SL PRS transmission are established, then positioning accuracy improves, but device complexity increases
Solution Approach 1:
The patent enables terminal devices to autonomously determine SL PRS transmission and reception parameters based on standardized rules and pre-configured information. Devices can independently select time-frequency resources, generate signal sequences, and manage transmission timing without requiring complex real-time negotiation, reducing operational complexity while maintaining accuracy.
Solution Approach 2:
The patent provides standardized parameter configurations that simplify device implementation by defining fixed relationships between transmission parameters, resource allocation, and signal structure. This reduces the complexity of parameter management while ensuring positioning accuracy through consistent parameter usage across the network.
3Productivity
If sidelink positioning is implemented without standardized resource allocation, then deployment flexibility is maintained, but spectral efficiency deteriorates
Solution Approach 1:
The patent creates a universal standardized framework for SL PRS transmission that can be applied across different deployment scenarios including network-covered, partial coverage, and out-of-coverage conditions. The same standardized resource allocation and signal transmission methods work universally across all scenarios, improving spectral efficiency while maintaining deployment flexibility through adaptability to different coverage conditions.
Solution Approach 2:
The patent enables dynamic adaptation of standardized SL PRS parameters based on coverage conditions and network requirements. Terminal devices can adjust transmission power, resource selection, and signal configuration within the standardized framework to optimize spectral efficiency for each specific deployment scenario while maintaining compatibility across the system.
Data Source
AI summary
Provided is a method for sidelink communication and a terminal device. The method includes: a first terminal device transmits or receives a sidelink reference signal in a first slot, where the first sidelink reference signal is used for sidelink positioning.