Sidelink PRS Resource Allocation With Flexible Slot Structures
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Solution Overview
Problem
The challenge lies in effectively indicating transmission resources for sidelink positioning reference signals (SL PRS) within shared or dedicated resource pools, particularly in NR-V2X systems, where resource allocation inefficiencies lead to increased bit error rates and degraded detection performance due to insufficient PSCCH resources and inflexible slot structures.
Innovation Solution
A method and apparatus for sidelink transmission that includes transmitting or receiving SL PRS within dedicated or shared resource pools, utilizing flexible slot structures and interlaced resource blocks to optimize resource allocation, ensuring efficient use of frequency and time domain resources, and incorporating mechanisms for resource selection and reservation to enhance PSCCH detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If SL PRS is transmitted within a shared resource pool for both SL PRS and sidelink data channel, then resource utilization is improved, but resource allocation efficiency deteriorates due to insufficient PSCCH resources and inflexible slot structures
Solution Approach 1:
The patent segments the resource pool into dedicated SL PRS resources and shared resources for sidelink data channels. By separating SL PRS transmission from general sidelink data transmission, the system ensures adequate PSCCH resources while maintaining flexible slot structures, thus resolving the contradiction between resource utilization and allocation efficiency
Solution Approach 2:
The patent introduces dynamic resource indication mechanisms where the network can flexibly allocate resources within the shared pool based on real-time conditions. This dynamic allocation allows efficient use of shared resources while maintaining the flexibility needed for optimal PSCCH resource distribution
2Reliability
If dedicated resource pool is used for SL PRS, then detection performance is improved, but resource allocation flexibility deteriorates
Solution Approach 1:
The patent creates a shared resource pool that can serve multiple functions: it can be used for SL PRS transmission when needed, and for sidelink data channel transmission otherwise. This multi-functionality allows the system to maintain detection performance through dedicated-like resource allocation while preserving flexibility through shared access capabilities
3Productivity
If flexible slot structures are used, then resource allocation efficiency is improved, but PSCCH resource indication complexity increases
Solution Approach 1:
The patent employs preliminary resource indication where the network pre-configures resource pools and allocation patterns before actual transmission occurs. This allows flexible slot structures to be established in advance through configuration messages, reducing the complexity of real-time resource indication while maintaining allocation efficiency
Data Source
AI summary
Provided are a sidelink transmission method and a terminal device. The method comprises: a terminal device sends or receives a first sidelink positioning reference signal in a first resource pool, wherein the first resource pool is one of the following: a dedicated resource pool for a sidelink positioning reference signal; and a shared resource pool for a sidelink positioning reference signal and a sidelink data channel.