System and method of routing emergency services calls in a radio

Details System and method of routing emergency services calls in a radio System and method of routing emergency services calls in a radio

1997-10-22

2000-10-03

Hunter, Daniel S.

Telecommunications

Radiotelephone system

Emergency or alarm communication

455445, 455456, 455560, G01S 108, H04B 715, H04B 100, H04M 1100

Patent

active

061284815

ABSTRACT:
A system and method for routing an emergency services call from a mobile station to a selected Public Safety Answering Point (PSAP) in a radio telecommunications network. The system intelligently selects the PSAP from a plurality of PSAPs, warns the selected PSAP that the emergency services call is coming prior to routing the call to the selected PSAP, and provides the selected PSAP with advanced information regarding the context of the call. The emergency services call is received by a serving mobile switching center (MSC) which determines that the call is an emergency services call and sends cell or sector information to a service control point (SCP). The SCP includes a PSAP selector which selects the PSAP based on such information as, for example, the location of the mobile station, the Local Access and Traffic Area (LATA) in which the mobile station is located, the time-of-day, and the day-of-week. The SCP then sends an alerting signal to the selected PSAP and includes a tag and information relating to the context of the call. The SCP then returns the tag and the identity of the selected PSAP to the serving MSC which determines the PSAP routing number and delivers the call to the selected PSAP.

REFERENCES:
patent: 4654481 (1987-03-01), Corris et al.
patent: 5343493 (1994-08-01), Karimullah
patent: 5388147 (1995-02-01), Grimes
patent: 5768686 (1998-06-01), LeBlanc et al.
patent: 5797093 (1998-08-01), Houde
patent: 5805688 (1998-09-01), Gillespie et al.

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