NR V2X Sidelink Resource Mapping for Phase Tracking
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Solution Overview
Problem
In wireless communication systems, particularly for V2X scenarios, there is a need for efficient methods to map and transmit sidelink control information, phase tracking-reference signals, and other reference signals to resources, as existing solutions do not adequately support efficient resource allocation and transmission in next-generation radio access technologies like NR.
Innovation Solution
A method and apparatus for efficiently performing sidelink communication by a first device, which includes configuring and transmitting sidelink control information, phase tracking-reference signals, and other reference signals, utilizing specific resource allocation and transmission techniques to support efficient wireless communication in NR-based systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing resource allocation methods are used for SL transmission in NR V2X, then the system maintains backward compatibility with previous RATs, but the communication capacity and transmission efficiency are insufficient for next-generation requirements
Solution Approach 1:
The patent applies parameter changes by modifying resource allocation parameters specifically for SL transmission in NR V2X. It introduces new parameter sets for resource allocation, modulation and coding schemes, and transmission power that are optimized for V2X scenarios, enabling higher communication capacity while maintaining manageable complexity through standardized parameter configurations.
Solution Approach 2:
The patent segments the resource allocation process into distinct phases and components: initial resource selection, resource reservation, dynamic re allocation, and transmission parameter configuration. This segmentation allows each aspect to be optimized independently for V2X requirements while maintaining overall system coherence and preventing excessive complexity.
2Reliability
If more reference signals are transmitted for channel estimation and phase tracking, then the transmission reliability is improved, but the overhead and resource consumption increase
Solution Approach 1:
The patent implements partial action by selectively transmitting reference signals based on channel conditions, traffic type, and reliability requirements. Instead of always transmitting maximum reference signals, the system transmits only the necessary portion - using phase tracking reference signals (PT-RS) and demodulation reference signals (DM-RS) with appropriate density and positioning optimized for V2X scenarios, thereby reducing overhead while maintaining required reliability.
3Productivity
If resource allocation is optimized for specific V2X scenarios, then the transmission efficiency for those scenarios is improved, but the system adaptability to different V2X use cases decreases
Solution Approach 1:
The patent applies dynamics by implementing adaptive resource allocation that can dynamically adjust parameters based on the specific V2X scenario, channel conditions, and traffic requirements. The system supports multiple configured resource pools and parameter sets that can be selectively activated for different scenarios such as platooning, basic safety messages, cooperative awareness, and extended sensors, thereby maintaining both optimization for specific scenarios and adaptability to diverse use cases.
Data Source
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AI summary
A method for performing wireless communication by a first device and a device for supporting same are provided. The method comprises the steps of: mapping first sidelink control information (SCI) onto a resource related to a physical sidelink control channel (PSCCH); mapping a phase tracking-reference signal (PT-RS) onto a resource related to a physical sidelink shared channel (PSSCH), on the basis of a cyclic redundancy check (CRC) on the PSCCH; mapping second SCI onto a resource onto which the PT-RS is not mapped, among resources related to the PSSCH; and transmitting the first SCI, the second SCI, and the PT-RS to a second device, wherein the second SCI is not mapped onto a resource onto which the PT-RS is mapped.