Method and apparatus for the autoselection of an emergency number in a mobile station
First Claim
1. A method for automatically selecting an emergency number appropriate to a geographical area during roaming of a mobile station, the method comprising:
- a. maintaining on said mobile station emergency numbers for a users home network;
b. storing on said device a preset parameter for indicating whether a TTY service associated with a geographic region is to be used;
c. storing on said device a look-up table of emergency dial strings based on a geographic indicator, network type, and the preset parameter;
d. comparing the emergency numbers against dial strings generated at said mobile station for asserting a valid emergency call if the dial string generated at said mobile station is amongst the emergency numbers;
e. upon a valid emergency call being asserted during roaming, selecting an emergency dial string appropriate for the geographic region roamed irrespective of the dial string generated at said mobile station, said emergency dial string being selected by;
i. connecting to a network if the mobile station is not already connected to any network to obtain a geographic indicator from the network, the network having a network type;
ii. obtaining a geographic indicator from the network if the mobile device is already connected to a network;
iii. obtaining an emergency dial string from the look-up table based on the obtained geographic indicator, the network type, and the preset parameter stored on the mobile station; and
f. placing the emergency call to an emergency service provider using the selected emergency dial string such that the appropriate emergency number is called during roaming.
7 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for the selection of an emergency number in a mobile station having a geographic indicator, the method comprising the steps of and the apparatus characterized by means for: determining whether a user is attempting to reach an emergency service provider; and if the user is attempting to reach an emergency service provider, connecting to a network if the mobile station is not already connected to a network; looking up an emergency dial string in a look-up table based on the geographic indicator and the network connected to and the underlying service; and sending the emergency dial string.
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Citations
16 Claims
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1. A method for automatically selecting an emergency number appropriate to a geographical area during roaming of a mobile station, the method comprising:
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a. maintaining on said mobile station emergency numbers for a users home network; b. storing on said device a preset parameter for indicating whether a TTY service associated with a geographic region is to be used; c. storing on said device a look-up table of emergency dial strings based on a geographic indicator, network type, and the preset parameter; d. comparing the emergency numbers against dial strings generated at said mobile station for asserting a valid emergency call if the dial string generated at said mobile station is amongst the emergency numbers; e. upon a valid emergency call being asserted during roaming, selecting an emergency dial string appropriate for the geographic region roamed irrespective of the dial string generated at said mobile station, said emergency dial string being selected by; i. connecting to a network if the mobile station is not already connected to any network to obtain a geographic indicator from the network, the network having a network type; ii. obtaining a geographic indicator from the network if the mobile device is already connected to a network; iii. obtaining an emergency dial string from the look-up table based on the obtained geographic indicator, the network type, and the preset parameter stored on the mobile station; and f. placing the emergency call to an emergency service provider using the selected emergency dial string such that the appropriate emergency number is called during roaming. - View Dependent Claims (2, 3, 4, 5, 6, 7, 15)
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8. A mobile apparatus configured to place an emergency call by automatically selecting an emergency number appropriate to a geographical area during roaming, comprising
a. means for maintaining on said mobile station emergency telephone numbers for a users home network, and for comparing the emergency numbers against dial strings generated at said mobile station for asserting a valid emergency call if the dial string generated at said mobile station is amongst the emergency numbers; -
b. a look-up table of emergency dial strings based on a geographic indicator, network type, and the preset parameter c. a transceiver configured to connect to a network if the mobile station is not already connected to any network, the network having a network type; d. retrieval means configured to obtain the geographic indicator, upon said valid emergency call being asserted; e. a selector configured for selecting an emergency dial string, upon a valid emergency call being asserted during roaming, the emergency dial string being appropriate for the geographic region roamed irrespective of the dial string generated at said mobile station, said emergency dial string being selected from a look-up table based on the obtained geographic indicator, the network type, and a user preset parameter stored on the mobile apparatus, a preset parameter for indicating whether a TTY service associated with a geographic region is to be used; and f. means for placing the emergency call to an emergency service provider using the obtained emergency dial string such that the appropriate emergency number is called during roaming, said transceiver, said geographic indicator retrieval means, said selector, and said emergency call placement means being responsive to an assertion that an attempt is being made to reach the emergency service provider irrespective of the specific dial string. - View Dependent Claims (9, 10, 11, 12, 13, 14, 16)
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Specification