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TRANSITIONING OF A PACKET-SWITCHED EMERGENCY CALL BETWEEN FIRST AND SECOND TYPES OF WIRELESS ACCESS NETWORKS

  • US 20110274012A1
  • Filed: 03/16/2010
  • Published: 11/10/2011
  • Est. Priority Date: 03/16/2009
  • Status: Active Grant
First Claim
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1. A method comprising:

  • detecting, by one or more processors, that a mobile station is involved in a packet-switched emergency call, wherein the mobile station is initially attached to a first type of wireless access network;

    detecting, by the one or more processors, transitioning of the mobile station from the first type wireless access network to a second, different type of wireless access network; and

    in response to detecting transitioning of the mobile station, the one or more processors sending a message indicating transitioning of the mobile station from the first type wireless access network to the second type wireless access network to cause the packet-switched emergency call to be performed over the second type wireless access network after the transitioning.

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