System and method for in-building presence system

Details System and method for in-building presence system System and method for in-building presence system

2008-07-22

2008-07-22

Nguyen, Duc (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S456100, C455S456200

Reexamination Certificate

active

07403786

ABSTRACT:
A telecommunications system includes a plurality of network clients (150) including a positioning controller (504) and a communications controller (502); and a positioning server (152) including a coordinating controller (161) for maintaining a database of network clients to be tracked and provide updates of position-related information to a presence server (104). The plurality of network clients (150) are configured to transmit position information received via the positioning controller (504) to the positioning server via the communications controller (502), the positioning information including information related to loss of a position signal.

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