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Peer-to-peer communication traversing symmetric network address translators

  • US 20070076729A1
  • Filed: 10/04/2005
  • Published: 04/05/2007
  • Est. Priority Date: 10/04/2005
  • Status: Active Grant
First Claim
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1. A method for peer-to-peer connection over a network between a first node behind a first network address translator (NAT) and a second node behind a second NAT, despite the first NAT and the second NAT intervening between the first and second nodes, wherein the first NAT is a Symmetric NAT, the method comprising the steps of:

  • performing a port prediction wherein the first node constructs a list of predicted transport addresses on the first NAT;

    sending an INVITE message containing the list of predicted transport addresses from the first node to the second node;

    performing a connectivity check with the second node using the predicted transport addresses.

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