SET-Initiated Area Event Triggered Positioning in SUPL Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile communication systems lack a SET-initiated area event triggered positioning method in SUPL-based systems, which prevents efficient area event triggered positioning procedures for roaming mobile terminals.
Innovation Solution
A SET-initiated area event triggered positioning method is introduced, where a first server receives a SESSION START message, requests and obtains area IDs from a second server, sends a SESSION RESPONSE message to the SET, and receives a calculated position estimate to determine if an area event trigger condition has been met, allowing the SET to initiate a positioning procedure only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous positioning procedures are performed for roaming SETs, then location service availability is improved, but signaling overhead and network resource consumption increase
Solution Approach 1:
The patent implements area event-triggered positioning where the SET initiates positioning procedures only when entering or leaving predefined geographic areas, rather than performing continuous positioning. This periodic action based on area events reduces signaling overhead while maintaining location service availability when needed
Solution Approach 2:
The SET autonomously determines when to initiate positioning procedures by monitoring its own location relative to stored area definitions. The terminal self-manages the triggering of positioning based on area events, reducing unnecessary network signaling while ensuring location services are available when the SET enters service areas
2Measurement precision
If positioning procedures are initiated frequently, then location information freshness is improved, but processing time and energy consumption increase
Solution Approach 1:
Positioning is triggered periodically based on area events (entering or leaving defined areas) rather than continuously. This ensures location information is updated at meaningful intervals when the SET's location status changes, maintaining freshness without unnecessary processing
Solution Approach 2:
The SET stores area definitions and positioning parameters in advance. When an area event occurs, the positioning procedure can be initiated immediately using pre-configured parameters, reducing processing time while maintaining location information freshness
Data Source
AI summary
A SET-initiated area event triggered positioning method in a session-based service system is disclosed. The method is variously performed according to a proxy mode or a non-proxy mode, and further according to which SLP (SUPL location platform) has a positioning procedure.