Remotely retrieving SIM stored data over a connection-less communications link
First Claim
1. A system for remotely retrieving subscriber data from a Subscriber Identity Module card attached to a mobile station, said system comprising:
- a mobile switching center for transmitting a first Unstructured Supplementary Service Data message to the mobile station, said first Unstructured Supplementary Service Data message including;
a request for said subscriber data; and
a data code field for informing said mobile station that the first Unstructured Supplementary Service Data message is intended for the Subscriber Identity Module card; and
said mobile station, responsive to the first Unstructured Supplementary Service Data message, for retrieving the requested subscriber data from the Subscriber Identity Module card and for transmitting a second Unstructured Supplementary Service Data message containing said retrieved subscriber data to the mobile switch center.
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Accused Products
Abstract
An SMS or USSD message encapsulating a request for Subscriber Identity Module (SIM) stored data is transported to the mobile station over a connection-less communications link such as a Stand-alone Dedicated Control Channel (SDCCH). An application module within the mobile station having access to the SIM card receives the request signal, retrieves the requesting information from the SIM card, and re-transmits it back to the requesting party. In order to facilitate proper return to the requesting party, if an SMS message is used, a return address is encapsulated into the transmitted SMS message for future reference. The serving mobile switching center (MSC) receives the transmitted message encapsulating the requested subscriber data and routes the received data to the original requesting party.
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Citations
11 Claims
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1. A system for remotely retrieving subscriber data from a Subscriber Identity Module card attached to a mobile station, said system comprising:
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a mobile switching center for transmitting a first Unstructured Supplementary Service Data message to the mobile station, said first Unstructured Supplementary Service Data message including; a request for said subscriber data; and a data code field for informing said mobile station that the first Unstructured Supplementary Service Data message is intended for the Subscriber Identity Module card; and said mobile station, responsive to the first Unstructured Supplementary Service Data message, for retrieving the requested subscriber data from the Subscriber Identity Module card and for transmitting a second Unstructured Supplementary Service Data message containing said retrieved subscriber data to the mobile switch center. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A mobile station used in a mobile telecommunications system, said mobile station comprising:
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a Subscriber Identity Module card for storing subscriber data; an application module coupled to the Subscriber Identity Module card; an Unstructured Supplementary Service Data handler coupled to the application module for extracting a request for a portion of the stored subscriber data from a first Unstructured Supplementary Service Data message, said first message having a data coding scheme field for informing said mobile station that the first message is intended for the Subscriber Identity Module card; and said application module, responsive to the extracted request, for retrieving the portion of the stored subscriber data from the Subscriber Identity Module and for encapsulating and transmitting a second Unstructured Supplementary Service Data message containing the retrieved portion of the subscriber data. - View Dependent Claims (8)
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9. A method used in a mobile telecommunications system for remotely retrieving subscriber data from a Subscriber Identity Module card attached to a mobile station, said method comprising the steps of:
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transmitting from a mobile switching center to the mobile station a first Unstructured Supplementary Service Data message having a request for said subscriber data; extracting the request from the first message; informing said mobile station that the first message is intended for the Subscriber Identity Module card; retrieving the requested subscriber data from the Subscriber Identity Module card; and transmitting a second Unstructured Supplementary Service Data message containing said retrieved subscriber data to the mobile switch center. - View Dependent Claims (10, 11)
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Specification