Cell-based emergency call systems and methods

Details Cell-based emergency call systems and methods Cell-based emergency call systems and methods

1997-01-09

2000-05-30

Nguyen, Lee

Telecommunications

Radiotelephone system

Emergency or alarm communication

455432, 455435, 455521, H04M 1100

Patent

active

060700653

ABSTRACT:
A satellite-based cellular communication system (100) is used to provide emergency services to subscriber units located anywhere on the earth. The surface of the earth is divided into defined areas and emergency codes are assigned to each one of the defined areas. As subscriber units (150) move relative to the surface of the earth, the satellite-based cellular communication system (100) updates the emergency codes stored in the subscriber units (150) as required based on the subscriber unit's current location. The subscriber unit (150) uses the stored emergency codes to determine when a user is requesting emergency services and prioritizes the call accordingly.

REFERENCES:
patent: 5555286 (1996-09-01), Tendler
patent: 5602901 (1997-02-01), Redden et al.

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