Terminal Positioning via Initial Access AOA Measurement
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Solution Overview
Problem
Current positioning methods for terminal devices require entering an RRC connected state to obtain direction information such as AOA, which increases complexity and delay.
Innovation Solution
Acquire first information associated with direction information of the terminal device relative to a base station during the initial access process, before transitioning to the RRC connected state, using methods like AOA measurement indication through preamble indices or scrambling in the random-access process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal device enters an RRC connected state to obtain direction information (AOA), then the positioning information can be obtained, but the positioning delay increases and the process complexity increases
Solution Approach 1:
The patent performs AOA measurement and obtains direction information during the initial access process (RRC idle state) before the terminal device needs to enter RRC connected state. By conducting the positioning measurement in advance during initial access, the patent eliminates the need to wait for RRC connection establishment, thereby reducing positioning delay while maintaining positioning accuracy
2Measurement precision
If the terminal device enters an RRC connected state to obtain direction information (AOA), then the positioning information can be obtained, but the process complexity increases
Solution Approach 1:
The patent merges the positioning measurement process with the initial access process. By combining AOA measurement with the random access procedure, the patent eliminates the need for a separate positioning process that would require RRC connection establishment. This integration reduces process complexity while ensuring positioning information is obtained accurately
Data Source
AI summary
This present disclosure provides a positioning method, a terminal device, and a network device. One example method includes: acquiring, by a terminal device, first information in an initial access process, where the first information is used to position the terminal device, and the first information is associated with direction information of the terminal device relative to a base station.