Mobile IAB TRP Information Updates for Accurate 5G Positioning
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Solution Overview
Problem
In 5G mobile communication systems with mobile base station relays (IAB nodes), the changing location of IAB-nodes affects positioning processes and regular services by altering TRP information, leading to inefficiencies in determining the location of terminal devices.
Innovation Solution
The method involves determining TRP information of mobile IAB nodes by a location management function (LMF) or terminal devices, using various types of auxiliary information to accurately identify and track the location of IAB nodes, thereby improving positioning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If mobile IAB nodes are used to extend network coverage, then network coverage and access capability are improved, but TRP information changes frequently causing positioning inaccuracies and service disruptions
Solution Approach 1:
The patent applies dynamics by making the TRP information update mechanism adaptive to the mobility of IAB nodes. The LMF dynamically updates TRP information based on location change detections, and the network adapts to varying node positions by implementing real-time location tracking and information refresh, allowing the system to handle mobile relays effectively while maintaining positioning accuracy.
Solution Approach 2:
The patent implements feedback mechanisms where the LMF receives location information of IAB nodes and uses this feedback to update TRP information. The system continuously monitors location changes and adjusts positioning parameters accordingly, creating a closed-loop control that maintains positioning accuracy despite node mobility.
2Measurement precision
If TRP information is updated frequently to track IAB node location changes, then positioning accuracy is improved, but system complexity and signaling overhead increase
Solution Approach 1:
The patent applies preliminary action by having the LMF proactively detect and update TRP information before positioning operations are affected by node movement. The system performs preliminary location change detections and updates positioning parameters in advance, preventing positioning inaccuracies rather than correcting them after they occur.
Solution Approach 2:
The patent changes the parameter update strategy by updating TRP information only when location changes are detected, rather than using fixed periodic updates. This adaptive parameter change approach maintains positioning precision while reducing unnecessary signaling overhead and system complexity.
3Device complexity
If traditional positioning methods are used without considering IAB node mobility, then system simplicity is maintained, but positioning accuracy and service reliability deteriorate
Solution Approach 1:
The patent introduces the LMF as an intermediary that manages the complexity of tracking mobile IAB nodes. The LMF acts as a mediator between the mobile relays and the positioning system, handling location information collection, TRP information updates, and coordination, thereby isolating the complexity from other system components while maintaining service reliability.
Data Source
AI summary
A method for determining transmission and reception point (TRP) information, performed by a location management function (LMF), including: determining TRP information of a mobile integrated access and backhaul (IAB) node, wherein the TRP information is used to determine location information of a terminal device accessing the mobile IAB node.