Configured-Grant SL-PRS Transmission for Sidelink Positioning
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Solution Overview
Problem
Existing sidelink positioning methods face challenges in efficiently transmitting sidelink positioning reference signals (SL-PRS) due to high signaling overhead and inflexible scheduling, which hinders accurate positioning between terminals.
Innovation Solution
Implementing configured grant (CG) resources to schedule grant-free transmission of SL-PRS, allowing terminals to transmit positioning signals based on pre-configured resources, reducing the need for repeated scheduling information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional scheduling methods are used to transmit SL-PRS, then scheduling flexibility is maintained, but signaling overhead increases and transmission efficiency decreases
Solution Approach 1:
The base station pre-configures grant-free transmission resources for SL-PRS before the actual transmission occurs. The terminal receives and stores these pre-configured resources, which include time-frequency resources and transmission parameters. When SL-PRS transmission is needed, the terminal directly uses the pre-configured resources without requiring additional scheduling requests or grants, thereby reducing signaling overhead and improving transmission efficiency.
2Loss of information
If configured grant resources are used for SL-PRS transmission, then signaling overhead is reduced, but scheduling flexibility may be limited
Solution Approach 1:
The system implements a hybrid approach where the base station can dynamically adjust between pre-configured grant-free resources and dynamic scheduling resources for SL-PRS transmission. The base station evaluates real-time network conditions, terminal positioning requirements, and resource availability to decide whether to use pre-configured resources or issue dynamic scheduling grants, thereby maintaining scheduling flexibility while reducing signaling overhead in appropriate scenarios.
3Reliability
If dynamic scheduling is used for SL-PRS, then resource allocation flexibility is maintained, but transmission reliability decreases due to repeated scheduling requirements
Solution Approach 1:
The base station pre-configures grant-free transmission resources for SL-PRS before the actual transmission occurs. The terminal receives and stores these pre-configured resources, which include time-frequency resources and transmission parameters. When SL-PRS transmission is needed, the terminal directly uses the pre-configured resources without requiring additional scheduling requests or grants, thereby reducing signaling overhead and improving transmission efficiency.
Data Source
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AI summary
The present disclosure relates to a sidelink positioning reference signal (SL-PRS) sending method and apparatus, and a storage medium. The method may be applied to a terminal. The method comprises: receiving configuration information of a configured grant (CG), wherein the configuration information is used for indicating a CG resource for sending an SL-PRS; and sending the SL-PRS according to the configuration information, SL-PRS sending based on a CG can be reliably implemented, thereby implementing terminal-to-terminal sidelink positioning.