Emergency calling with a GSM radiotelephone
First Claim
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1. A method for allowing emergency calling with a Global System for Mobile (GSM) radiotelephone during temperature extremes, the method comprising the steps of:
- detecting an error condition in a Subscriber Identification Module (SIM) card of the GSM radiotelephone;
measuring a temperature;
determining whether the temperature is outside of an operating range of the SIM card; and
allowing emergency calls to be made by the radiotelephone if the temperature is outside of an operating range of the SIM card.
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Abstract
An apparatus and method for allowing emergency calling with a Global System for Mobile (GSM) radiotelephone during temperature extremes includes a Subscriber Identification Module (SIM) card, a temperature sensor; and a controller that detects when the radiotelephone has a SIM card error, whereupon the controller obtains a temperature measurement from the temperature sensor. If it is found that the temperature measurement is outside of an operating temperature range of the SIM card, the controller permits the radiotelephone to make an emergency calls only.
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Citations
25 Claims
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1. A method for allowing emergency calling with a Global System for Mobile (GSM) radiotelephone during temperature extremes, the method comprising the steps of:
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detecting an error condition in a Subscriber Identification Module (SIM) card of the GSM radiotelephone; measuring a temperature; determining whether the temperature is outside of an operating range of the SIM card; and allowing emergency calls to be made by the radiotelephone if the temperature is outside of an operating range of the SIM card. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for allowing emergency calling with a Global System for Mobile (GSM) radiotelephone during temperature extremes, the method comprising the steps of:
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periodically checking for an error condition in a Subscriber Identification Module (SIM) card of the GSM radiotelephone; measuring a temperature upon detection of an error condition; determining whether the temperature is outside of an operating range of the SIM card; allowing emergency calls to be made by the radiotelephone if the temperature is outside of an operating range of the SIM card; and detecting whether the radiotelephone is in an emergency call and then waiting until the call is completed. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. An apparatus for allowing emergency calling with a Global System for Mobile (GSM) radiotelephone during temperature extremes, the apparatus comprising:
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a Subscriber Identification Module (SIM) card coupled to the GSM radiotelephone; a temperature sensor; and a controller being coupled to the temperature sensor and SIM card, the controller periodically checks for a SIM card error, whereupon the controller obtains a temperature measurement from the temperature sensor, wherein if the temperature measurement is outside of an operating temperature range of the SIM card the controller allows the radiotelephone to make an emergency call. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification