Technique for enabling emergency call callback of a terminal...

Details Technique for enabling emergency call callback of a terminal... Technique for enabling emergency call callback of a terminal...

2001-02-15

2003-05-27

Maung, Nay (Department: 2681)

Telecommunications

Radiotelephone system

Emergency or alarm communication

75, 75

Reexamination Certificate

active

06571092

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to supporting emergency calls in, for example, an IP (Internet Protocol) based mobile network. More particularly, the present invention relates to a technique for enabling an emergency call callback of a mobile terminal, such as a mobile terminal, which does not have valid subscriber identity, such as a SIM (Subscriber Identification Module).
2. Description of the Related Art
In the United States, the FCC (Federal Communications Commission) has a requirement that an emergency call center should be able to call back a caller who has made an emergency call if the call was dropped. In the case of a caller calling from a mobile terminal, upon an emergency call being dropped, the mobile network is likely to perform paging for the terminal/subscriber who made the emergency call initially. However, if the caller made the call from a mobile terminal, which did not have a valid subscriber identity, such as a SIM, the network cannot perform paging since it does not know the identity of the caller.
SUMMARY OF THE INVENTION
In accordance with the present invention, upon a caller making a call from a terminal to a called party without a valid subscriber identity, the terminal is temporarily assigned an temporary subscriber identity. The temporary subscriber identity includes a call back identity which the called party can use to identify the caller terminal when calling the caller terminal back. The call back identity can be a CBN (Call Back Number), such as an E. 164 number, which can be later used to establish a connection to the called party.
Furthermore, in accordance with the present invention, the temporary subscriber identity includes, for example, a TMSI (Temporary Mobile Subscriber Identity) or IMSI (International Mobile Subscriber Identity), which can later be used to establish a connection to the called terminal.


REFERENCES:
patent: 5712900 (1998-01-01), Maupin et al.
patent: 5864755 (1999-01-01), King et al.
patent: 5892822 (1999-04-01), Gottlieb et al.
patent: 5937344 (1999-08-01), Zicker
patent: 6014555 (2000-01-01), Tendler
patent: 6223046 (2001-04-01), Hamill-Keays et al.
patent: 6240462 (2001-05-01), Agraharam et al.
patent: 6385302 (2002-05-01), Antonucci et al.

Affiliated with

Also associated with

Rating

Technique for enabling emergency call callback of a terminal... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Technique for enabling emergency call callback of a terminal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Technique for enabling emergency call callback of a terminal... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3006300