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METHOD AND TERMINAL FOR IMPLEMENTING A VOICE SERVICE

  • US 20140071951A1
  • Filed: 09/30/2013
  • Published: 03/13/2014
  • Est. Priority Date: 03/31/2011
  • Status: Abandoned Application
First Claim
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1. A method for implementing a voice service, comprising:

  • residing, by a terminal, in a cell on a 4G network;

    sending, by the terminal, a combined attachment message or a combined location update message to a mobility management entity (MME) on the 4G network to attach to a 2G/3G network and the 4G network, wherein a circuit switched (CS) transceiver of the terminal is in off state;

    sending, by the terminal, an extended service request message to the MME when a voice service needs to be implemented, so that the MME instructs that a base station on the 4G network needs to trigger a CS fallback;

    receiving, by the terminal, a notification on measuring the 2G/3G network sent by the base station on the 4G network;

    turning on, by the terminal, the CS transceiver, and measuring the 2G/3G network according to the notification; and

    implementing, by the terminal, the voice service on the 2G/3G network according to a measurement result.

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