System and method for IPv4 and IPv6 migration

System and method for IPv4 and IPv6 migration

  • CN 101,523,872 B
  • Filed: 09/25/2007
  • Issued: 07/02/2014
  • Est. Priority Date: 09/25/2006
  • Status: Active Grant
First Claim
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1. a method for session setup in network system, described network system comprises the equipment with IPv4 address style and the equipment with IPv6 address style,The access side network of described network system is divided into first kind access network and Equations of The Second Kind access network, described first kind access network comprises the test point that can carry out network address port conversion-protocol conversion NAPT-PT and NAPT operation, and described Equations of The Second Kind access network comprises the test point that can not carry out NAPT-PT and NAPT operation;

  • Described test point is being made a start and terminal agent CSCF P-CSCF or interconnection boundary Control function I-BCF;

    The rule that test point carries out address transition is one of the following;

    Regulation G 1;

    in the time that IPv4 business is detected to address field mismatch, carry out NAPT and call;

    Rule O1;

    if only have an address style in the Session Description Protocol SDP of the session invitation request SIP INVITE receiving, the test point in described first kind access network should be carried out dual stack analog D SE subscriber equipment;

    Described method comprises;

    Receive session invitation request from calling subscriber equipment;

    Test point determines whether described calling subscriber equipment and called subscriber equipment have common address style;

    According to regular O1, by CSCF simulated dual protocol stack subscriber equipment.

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