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Device and method for maintaining a communication session during a network transition

  • US 8,948,132 B2
  • Filed: 04/01/2013
  • Issued: 02/03/2015
  • Est. Priority Date: 03/15/2005
  • Status: Active Grant
First Claim
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1. A method comprising:

  • monitoring, by a first communication device, a first connection with a first network to determine whether a signal strength of the first connection falls below a threshold value, wherein the first connection is used by the first communication device for a peer-to-peer communication session with a second communication device;

    establishing, by the first communication device, a second connection with a second network if the signal strength of the first connection falls below the threshold value, wherein establishing the second connection includes obtaining an address and port assignment corresponding to the first communication device from the second network; and

    maintaining, by the first communication device, the peer-to-peer communication session during the changeover from the first connection to the second connection using the obtained address and port assignment, wherein the maintaining includes;

    saving, by the first communication device, a current state of the first communication device prior to terminating the first connection, wherein the saved current state includes information about the peer-to-peer communication session;

    using, by the first communication device, the saved current state to re-establish the peer-to-peer communication session after the changeover to the second connection; and

    refreshing, by the first communication device, the saved current state with a new current state obtained from a server after the changeover to the second connection, wherein the refreshing updates the first communication device with information not received by the first communication device during the changeover.

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