Sidelink Anchor Entity Selection for Positioning Reliability
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Solution Overview
Problem
In communication scenarios based on sidelink (SL), terminals face challenges in performing positioning using positioning reference signals (PRS) transmitted by network devices.
Innovation Solution
A method and apparatus that allow terminals to determine a first anchor entity for transmitting a PRS, which can be configured by the network device or autonomously selected by the terminal, enabling the terminal to perform positioning by measuring the PRS from the anchor entity, with optional configurations and reconfigurations based on measurement information and timer events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal performs positioning based on PRS transmitted by network devices in a sidelink communication scenario, then positioning functionality is achieved, but the terminal cannot reliably determine which anchor entity to use for positioning measurements
Solution Approach 1:
The network device acts as an intermediary to assist the terminal in selecting anchor entities. The network device receives measurement information from the terminal about candidate anchor entities and uses this information to determine and configure the appropriate anchor entity list back to the terminal, thereby mediating the complex selection process
Solution Approach 2:
The terminal provides feedback to the network device by reporting measurement information about candidate anchor entities (such as signal strength, quality metrics). The network device uses this feedback to intelligently determine which anchor entities are suitable for positioning and configures them accordingly
2Measurement precision
If the network device configures anchor entities to the terminal, then positioning accuracy is improved, but the system complexity and signaling overhead increase
Solution Approach 1:
Instead of configuring all possible anchor entities to the terminal, the network device performs partial configuration by selecting and configuring only the most suitable anchor entities based on terminal-reported measurement information. This reduces the complexity and signaling overhead while maintaining positioning accuracy
3Loss of energy
If the terminal autonomously selects anchor entities, then signaling overhead is reduced, but positioning reliability decreases due to suboptimal selection
Solution Approach 1:
The terminal performs preliminary action by measuring and reporting information about candidate anchor entities to the network device before the final anchor entity configuration. This preliminary measurement phase allows the terminal to contribute to the selection process with minimal additional signaling, while the network device makes the final determination to ensure reliability
Data Source
AI summary
The present disclosure discloses a positioning method and apparatus, a device, and a medium, and relates to the technical field of communications. The positioning method includes: determining, by a terminal, a first anchor entity. The first anchor entity is configured to transmit a positioning reference signal (PRS)