SL-PRS Resource Scheduling for Accurate Sidelink Positioning
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Solution Overview
Problem
In New Radio (NR) positioning technology, the scheduling of sidelink positioning reference signals (SL-PRS) is not defined, preventing user equipment from accurately determining resource information for sidelink positioning.
Innovation Solution
A method and apparatus for transmitting control information to schedule sidelink positioning reference signals (SL-PRS), including resource pool, time-frequency, pattern, and priority information, to facilitate accurate sidelink positioning between user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sidelink positioning reference signal scheduling is not defined in the PCS interface, then the system maintains simpler architecture without direct UE-to-UE scheduling, but user equipment cannot determine resource information for SL-PRS transmission and reception
Solution Approach 1:
The patent introduces control information as an intermediary carrier that transmits resource allocation details for SL-PRS. This control information acts as a mediator between the scheduling entity and the user equipment, enabling resource determination without requiring complex direct UE-to-UE scheduling definitions in the PCS interface. The control information contains essential resource parameters that bridge the gap between simplified architecture and complete resource information availability.
2Extent of automation
If user equipment relies on downlink or uplink positioning reference signals from base station, then the system maintains centralized control through base station, but user equipment cannot perform independent relative positioning between devices
Solution Approach 1:
The patent segments the positioning function into two independent parts: centralized control for resource allocation (maintained by base station through control information) and independent execution for positioning measurement (performed by user equipment using SL-PRS). This segmentation allows user equipment to receive minimal scheduling directives while performing complete positioning operations independently, enabling both centralized control and device-to-device positioning versatility simultaneously.
3Measurement precision
If comprehensive control information for SL-PRS is transmitted to user equipment, then user equipment can accurately determine resource information, but the control information structure becomes more complex
Solution Approach 1:
The patent applies local quality by providing different levels of control information detail to different user equipment based on their specific positioning needs and capabilities. Rather than transmitting complete resource information to all devices, the system provides targeted control information containing only the essential parameters needed for each UE's SL-PRS reception, optimizing the balance between determination accuracy and information structure complexity for each local context.
Data Source
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AI summary
The present disclosure provides an information transmission method, device and apparatus, and belongs to the technical field of communications. The information transmission method includes: transmitting first control information to a first user equipment. The first control information is used to schedule a first sidelink positioning reference signal (SL-PRS). The first device is a network device or a second user equipment, and the first control information is information related to a transmission resource of the first SL-PRS.