Network-Initiated Area Event Triggered Positioning for Roaming Terminals
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Solution Overview
Problem
Current mobile communication systems lack an effective area-based or area event-triggered positioning method for roaming terminals, particularly in SUPL-based systems, which fail to efficiently manage positioning services when a terminal roams into or out of specific areas.
Innovation Solution
A network-initiated area event triggered positioning method is introduced, where a first server initiates a session with a roaming terminal, requests and obtains area IDs from a second server, and provides these IDs to the terminal, allowing the terminal to determine if it has entered a specific area, triggering a positioning procedure only when the area event condition is met, and sending the calculated position to an agent when the condition is satisfied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous positioning is performed for roaming terminals, then positioning availability is improved, but signaling overhead and network load increase
Solution Approach 1:
The patent implements periodic positioning triggered by area events rather than continuous positioning. The network server sends area event trigger requests to the roaming terminal, and positioning is performed only when the terminal enters or exits predefined geographic areas. This periodic, event-driven approach maintains positioning availability when needed while significantly reducing signaling overhead compared to continuous positioning.
2Productivity
If area event triggered positioning is implemented for roaming terminals, then positioning efficiency is improved, but system complexity increases
Solution Approach 1:
The patent introduces a network server as an intermediary between the home SLP and visited SLP to manage area event triggered positioning for roaming terminals. The network server coordinates the positioning requests, manages area definitions, and triggers positioning events, thereby simplifying the overall system architecture while improving positioning efficiency. This intermediary approach avoids the complexity that would arise from direct terminal-to-SLP area event management across network boundaries.
3Quantity of substance
If positioning is performed only when area events occur, then signaling overhead is reduced, but positioning response time may increase
Solution Approach 1:
The patent employs preliminary action by pre-defining geographic areas and setting up area event triggers before the terminal actually needs positioning. The network server预先 establishes the area boundaries and trigger conditions, so when the terminal enters or exits these predefined areas, positioning can be immediately triggered without delay for area definition or configuration. This preliminary setup reduces the response time when positioning is actually needed while maintaining low signaling overhead.
Data Source
AI summary
A network-initiated area event triggered positioning method for a terminal in a session-based position information system is discussed. Network-initiation of area-based positioning of a roaming terminal is discriminated according to a proxy mode and a non-proxy mode, and area-based positioning for the roaming terminal is performed in various manners according to whether an SLP for performing the positioning procedure with respect to the discriminated modes is a V-SLP or an H-SLP.