×

Remotely retrieving SIM stored data over a connection-less communications link

  • US 5,915,225 A
  • Filed: 03/28/1996
  • Issued: 06/22/1999
  • Est. Priority Date: 03/28/1996
  • Status: Expired due to Term
First Claim
Patent Images

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.

View all claims
  • 8 Assignments
Timeline View
Assignment View
    ×
    ×