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Routing traffic towards a mobile node

  • US 9,179,447 B2
  • Filed: 02/01/2011
  • Issued: 11/03/2015
  • Est. Priority Date: 02/01/2011
  • Status: Active Grant
First Claim
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1. A method of allowing a data connection to be made between a mobile node attached to a private IP network and a node external to the private IP network and connected to a public IP network, the method comprising:

  • allocating a private network IP address, a hostname, and a service name to said mobile node, the service name being associated with a service provided by the first node;

    at a gateway interconnecting said private and public IP networks, allocating a unique public network side port number to the mobile node and including, in a connection table, a mapping between said private network IP address and said public network side port; and

    installing in a Domain Name System, DNS, of the public IP network,a service, SRV, record defining said hostname and public network side port number as the location for said service name, andan address, A, record defining a public IP address of said gateway as the location for said hostname,wherein said node external to the private IP network is able to perform a DNS lookup in the public IP network in order to resolve said service name into a public IP address and port number and said gateway listens at said public side network port number for connection attempts to said mobile node.

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