Triggered Location Server Area Definition for Mobile Terminal Proximity
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Solution Overview
Problem
Current mobile communication systems lack a method to efficiently determine the proximity of one moving mobile terminal to another, where the movement and direction of the second terminal are unknown, leading to unnecessary network load and inaccurate trigger events.
Innovation Solution
A method and system that set a trigger distance between two mobile terminals, allowing a triggered location server to define geographical areas around each terminal, sending triggers when one terminal moves outside its area, thereby reducing network load by optimizing trigger events based on movement behavior and distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the RBS continuously measures the position of the mobile terminal, then the position information accuracy is improved, but the network load increases due to unnecessary measurements
Solution Approach 1:
The mobile terminal performs preliminary location determination using GPS or other positioning systems and stores this information locally. The terminal only communicates with the network when necessary (when entering predefined areas or when location updates are needed), rather than continuously measuring position. This preliminary action reduces unnecessary network measurements while maintaining position accuracy.
Solution Approach 2:
The mobile terminal autonomously determines its own location and manages its positioning needs without requiring continuous RBS measurement and network coordination. The terminal independently handles location determination, area monitoring, and trigger generation, reducing the network's measurement burden while maintaining accurate position information.
2Loss of information
If the RBS measures position of non-moving terminals, then position information is obtained, but the network load increases due to unnecessary messaging
Solution Approach 1:
The system pre-defines geographical areas around mobile terminals based on their location and movement patterns. The terminal only initiates position measurement and network communication when it enters or exits these predefined areas, rather than continuously reporting position. This preliminary area definition reduces unnecessary messaging while ensuring position information is obtained when needed.
Solution Approach 2:
Instead of continuous position measurement and network messaging, the system uses periodic triggers based on predefined areas and movement conditions. The terminal periodically checks its location against predefined areas and only initiates network communication when specific trigger conditions are met, reducing overall network load while maintaining necessary position information acquisition.
3Measurement precision
If trigger events are sent for every small movement, then the proximity detection accuracy is improved, but the network load increases
Solution Approach 1:
The system defines geographical areas with specific characteristics around mobile terminals, where trigger events are only generated when the terminal enters or exits these areas. The area definition and trigger conditions are tailored to the specific local context and movement patterns, ensuring that triggers are sent only when genuinely necessary for proximity detection, reducing unnecessary network load.
Solution Approach 2:
The system pre-establishes geographical areas and trigger conditions before actual movement occurs. By defining these areas in advance based on terminal location and expected movement patterns, the system avoids generating triggers for every small movement while maintaining accurate proximity detection when terminals actually approach each other.
Data Source
AI summary
A method in a mobile communication system for determining a distance between a first mobile terminal and a second mobile terminal. Based on a trigger distance between the first and the second mobile terminal, a triggered location server defines an area surrounding the first mobile terminal and optionally defines an area surrounding the second mobile terminal. The trigger distance may be provided by an application e.g. for providing a location based service. If the first mobile terminal determines that it has moved outside of its area, it sends a trigger to the triggered location server. If the trigger distance between the first and the second mobile terminal is reached, the triggered location server may report this to the application as an event.