Terminal switching method in astable voip call, network element, equipment and system

Terminal switching method in astable voip call, network element, equipment and system

  • CN 102,474,789 B
  • Filed: 07/31/2009
  • Issued: 03/23/2016
  • Est. Priority Date: 07/31/2009
  • Status: Active Grant
First Claim
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1. , for terminal to be switched to a method for circuit commutative field under the unsteady state of calling from packet-switched domain, comprising:

  • First network unit based on being received from the setup requests of described terminal and this calling of grappling, and preserves the Temporary Response of described terminal and the state of this calling of returning to;

    Described terminal detects that needs carry out switching and send measurement report to Access Network;

    As long as long as described Access Network detects signaling bear under this measurement report meets the prerequisite of switching condition, just judge to switch to second network unit requests;

    Described second network unit, after receiving the request to switching from described Access Network, as long as described signaling bear detected, just judges to send the handover request of packet-switched domain to circuit commutative field to described first network unit;

    AndAfter described first network unit receives this handover request, if detect that this calling is in unsteady state, then check before preserve described Temporary Response and described Temporary Response is sent to the 3rd network element, continued session handoff procedure thus and upgraded remote portWherein, the unsteady state of described calling is the state of calling out when not also being established completely.

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