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System and method of providing voice and data features in a time division multiple access (TDMA) network

  • US 20020111167A1
  • Filed: 02/13/2001
  • Published: 08/15/2002
  • Est. Priority Date: 02/13/2001
  • Status: Abandoned Application
First Claim
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1. A method of retaining an active subscriber record in a Home Location Register (HLR) for a mobile station operating in a radio telecommunications network when the mobile station switches from a voice mode to a data mode, said method comprising the steps of:

  • transmitting from the mobile station to a serving base station, a power-down registration message that includes a Data Mode Indicator (DMI);

    sending the power-down registration message and DMI from the base station to a serving Mobile Switching Center (MSC);

    sending from the MSC to the HLR, a registration cancellation message that includes the DMI; and

    in response to receiving the DMI, setting an indicator in the subscriber record in the HLR indicating that the mobile station is operating in the data mode.

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