Local emergency alert for cell-phone users

Details Local emergency alert for cell-phone users Local emergency alert for cell-phone users

2005-04-19

2005-04-19

Trost, William (Department: 2683)

Telecommunications

Radiotelephone system

Emergency or alarm communication

C455S404200, C455S521000

Reexamination Certificate

active

06882837

ABSTRACT:
Local emergency alert service for cell-phone or pager users is provided using regional or localized broadcast to or polling of available, voluntary, or otherwise identified wireless communication devices or other network-accessible nodes operating using different protocol in proximate help area, thus allowing such alerted users to respond to nearby emergency request or condition. Wireless communicator location is determined using relative satellite positioning, radio signal triangulation, or manual entry technique. Sensor may alert wireless communicator automatically of emergency condition.

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