In-Vehicle eNodeB Proactive Warning via GPS Tracking
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Solution Overview
Problem
Current public warning systems in LTE networks fail to provide timely warnings to mobile eNodeBs, such as those installed in emergency vehicles, until they enter a danger zone, which can be life-threatening in scenarios like approaching areas under threat from natural calamities.
Innovation Solution
Implementing a dynamic public warning system using Parallel Wireless's HetNet Gateway (HNG) with self-organizing networking (SON) and in-vehicle eNodeBs, which utilizes GPS coordinates to determine the geographic location of mobile eNodeBs relative to emergency areas and sends warning messages proactively when they approach a danger zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional PWS sends warning messages only when eNodeBs enter emergency areas, then network infrastructure complexity is reduced, but warning timeliness deteriorates making it life-threatening
Solution Approach 1:
The system performs preliminary actions by determining the geographic location of mobile eNodeBs using GPS coordinates before they enter emergency areas. The coordinating server proactively identifies when mobile eNodeBs are approaching danger zones and sends warning messages in advance, rather than waiting for entry into the emergency area. This preliminary detection and warning mechanism ensures timely alerts while maintaining manageable system complexity through centralized coordination.
2Loss of time
If GPS tracking and proactive warning mechanisms are implemented, then warning timeliness is improved, but device complexity increases
Solution Approach 1:
The patent introduces a coordinating server as an intermediary between mobile eNodeBs and the PWS infrastructure. This intermediary centralizes the complex functions of GPS coordinate reception, geographic area determination, and proactive warning message routing. By placing the coordination logic at the server level rather than in each eNodeB, the system achieves timely warnings through continuous location monitoring while keeping individual device complexity low.
3Measurement precision
If mobile eNodeBs continuously report GPS coordinates, then warning accuracy is improved, but energy consumption increases
Solution Approach 1:
The system implements periodic action by having mobile eNodeBs report GPS coordinates at intervals rather than continuously. The coordinating server requests location information and receives updates periodically, determining geographic locations based on these periodic reports. This approach maintains sufficient location accuracy for warning purposes while significantly reducing energy consumption compared to continuous reporting.
Data Source
AI summary
A method is disclosed, comprising: sending position information reflecting a current position of a base station to a coordinating server; receiving a warning request message from an operator core network containing an emergency area; calculating a geographic area corresponding to an emergency tracking area by translating the emergency area from a set of base stations to the geographic area; determining whether the base station may be outside of a threshold distance from the geographic boundary of the emergency tracking area; and sending the warning request message when the base station may be within the threshold distance from the geographic boundary of the emergency tracking area.