Ranging and Sidelink Positioning Coordination Through LMF Requests
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Solution Overview
Problem
In communication systems, the unclear roles of terminal devices and location management functions (LMF) in ranging/sidelink positioning lead to inaccurate or unperformable calculations, necessitating a method to clarify information requirements and nodes for accurate positioning.
Innovation Solution
A method where terminal devices and LMFs exchange ranging/sidelink positioning service requests with indication information, initiating measurements, and sending measurement data and results accordingly to ensure accurate calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ranging/sidelink positioning is performed without clear role definition and information requirements, then the positioning calculation cannot be performed or is inaccurate, but implementing a standardized method increases system complexity and communication overhead
Solution Approach 1:
The patent segments the positioning system into distinct functional roles (LMF as location management function and terminal devices as measurement nodes) with clearly defined responsibilities. The LMF initiates positioning requests, terminal devices perform measurements, and results are reported back in a structured manner. This segmentation clarifies information requirements and enables accurate positioning calculations without requiring all nodes to perform all functions.
Solution Approach 2:
The patent introduces specific parameters and indication information in positioning requests to define measurement requirements, reporting formats, and calculation methods. By standardizing these parameters (such as measurement type indicators, reporting triggers, and result formats), the system achieves consistent and accurate positioning results across different terminal devices while maintaining manageable complexity through parameterized configurations.
2Measurement precision
If detailed indication information is exchanged for accurate positioning, then positioning accuracy improves, but communication overhead and information exchange complexity increase
Solution Approach 1:
The patent extracts only the essential indication information needed for positioning into standardized request messages. Rather than exchanging all possible measurement data and parameters, the LMF extracts and transmits only the specific measurement requirements, target identifiers, and reporting preferences needed for the positioning task. This reduces information overhead while maintaining positioning accuracy by focusing on critical parameters.
Solution Approach 2:
The patent creates universal positioning request and report message formats that can accommodate different measurement types (OTDOA, UTDOA, sidelink positioning) through standardized fields and indication bits. These multi-functional message structures allow the same communication protocol to handle various positioning scenarios, reducing the need for multiple specialized message formats and thereby reducing overall information overhead.
Data Source
AI summary
A ranging/sidelink positioning method is performed by a first terminal device, and includes: receiving a first ranging/sidelink positioning service request sent by a location management function (LMF), wherein the first ranging/sidelink positioning service request carries indication information; initiating ranging/sidelink positioning between the first terminal device and a second terminal device in response to the first ranging/sidelink positioning service request; and sending at least one of measurement data or a measurement result of the ranging/sidelink positioning to the LMF according to the indication information.