Systems and methods for handling emergency calls in hierarchical

Details Systems and methods for handling emergency calls in hierarchical Systems and methods for handling emergency calls in hierarchical

1997-04-22

2000-09-05

Tsang, Fan

Telecommunications

Radiotelephone system

Emergency or alarm communication

455521, 455449, 455456, H04Q 738

Patent

active

061155969

ABSTRACT:
Emergency call handling may, in the near future, require terminal unit location information to be provided to emergency service centers. Exemplary embodiments of the present invention facilitate the provision of this information by reducing a number of monitoring stations needed to track terminal location based upon control channel access. First, mobile units placing emergency calls can be forced to used designated control channels which may differ from control channels to which they are currently listening. Second, mobile units may be required to transmit at greater than specified power levels so that monitoring stations receive their emergency call access.

REFERENCES:
patent: 4839892 (1989-06-01), Sasaki
patent: 5175867 (1992-12-01), Wejke et al.
patent: 5327144 (1994-07-01), Stilp et al.
patent: 5353332 (1994-10-01), Raith et al.
patent: 5499386 (1996-03-01), Karlsson
patent: 5732125 (1998-03-01), Oyama
patent: 5742666 (1998-04-01), Alpert
International Search Report re PCT/US98/06496 Date of mailing of search: Nov. 19, 1998.
Louis A. Stilp, "Time Difference of Arrival Technology for Locating Narrowband Cellular Signals", Proceedings of the SPIE, vol. 2602, pp. 134-144 (1996).

Affiliated with

Also associated with

Rating

Systems and methods for handling emergency calls in hierarchical does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Systems and methods for handling emergency calls in hierarchical, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods for handling emergency calls in hierarchical will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2222086