UE Positioning Method Selection for Dynamic Wireless Networks
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Solution Overview
Problem
Current positioning methods in wireless networks face challenges in dynamic environments, such as quick changes in satellite shadowing and small UE movements, leading to reduced accuracy and increased latency in location determination.
Innovation Solution
The UE is configured to select the most suitable positioning method from a plurality of available methods based on location context and criteria, such as accuracy and energy consumption, and communicates this selection to the location server, allowing for improved latency and reduced signaling in location information retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the location server specifies the positioning method, then the server has full control over positioning methodology, but the positioning accuracy decreases in dynamic environments due to inability to adapt to quick changes
Solution Approach 1:
The patent inverts the traditional control relationship by allowing the UE (user equipment) to select the positioning method instead of the location server. The UE evaluates multiple positioning methods based on current environmental conditions and selects the most suitable one, then reports the selected method and location information to the server. This inversion enables adaptive positioning in dynamic environments while maintaining server control over the overall process.
Solution Approach 2:
The patent introduces dynamic selection of positioning methods based on changing environmental conditions. The UE continuously evaluates the suitability of different positioning methods (such as GNSS, OTDOA, ECID) according to current conditions like satellite visibility, signal quality, and movement status, allowing the system to adapt dynamically rather than using a static server-specified method.
2Measurement precision
If multiple positioning methods are evaluated and selected dynamically, then positioning accuracy improves in changing environments, but signaling overhead and latency increase
Solution Approach 1:
The patent applies preliminary action by having the UE pre-evaluate multiple positioning methods and identify the most suitable one before actually performing positioning. The UE assesses the availability and suitability of different methods based on current conditions, selects the optimal method in advance, and then proceeds with positioning using that method, reducing actual positioning latency.
Solution Approach 2:
The UE performs self-service by autonomously evaluating positioning methods, selecting the most suitable one, and determining its own location without requiring the server to specify the method. This self-service approach reduces signaling overhead and latency compared to server-controlled method selection, while the server retains oversight by receiving the selected method information and location results.
3Productivity
If the UE autonomously selects positioning methods, then positioning performance improves through adaptive selection, but the complexity of the positioning system increases
Solution Approach 1:
The patent uses an intermediary approach where the UE acts as the selector of positioning methods based on pre-defined evaluation criteria. The UE evaluates methods according to established parameters (such as signal quality, availability, and suitability for current conditions) and selects accordingly, reducing the need for complex real-time decision-making algorithms while improving positioning performance through adaptive selection.
Data Source
AI summary
A method carried out in a user equipment, UE, (1) for generating location information to a location server (130) in a wireless network (100), the method comprising: receiving (404), from the location server, a location request message identifying a request for location information based on a UE-determined positioning method; obtaining (410) location information using a positioning method selected by the UE out of a plurality of available positioning methods, based on the location request message; transmitting (412) the location information to the location server.