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Method, system and node for providing enhanced mobility in simple IP telecommunication networks when performing L2TP tunneling

  • US 6,999,435 B2
  • Filed: 03/29/2001
  • Issued: 02/14/2006
  • Est. Priority Date: 03/29/2001
  • Status: Expired due to Term
First Claim
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1. A method for performing mobility management in a communication network, said method comprising the steps of:

  • establishing a connection between a mobile station and a first service node in the communication network;

    extending the established connection from the first service node to a terminal node in the communication network;

    upon an establishment of a tunneled Point-to-Point Protocol (PPP) connection between the mobile station and the terminal node via the first service node, assigning at the terminal node a unique address to the mobile station, said address associated with the mobile station and the tunneled PPP connection established between the mobile station and the terminal node via the first service node; and

    upon roaming of the mobile station connected to the first service node from the coverage area of the first service node to the coverage area of a second service node in the communication network, ensuring continuous connectivity between the mobile station and the terminal node by;

    establishing a new connection between the mobile station and the second service node;

    extending the established new connection from the second service node to the terminal node;

    verifying at the terminal node whether the unique address assigned to the mobile station is associated with a prior connection with the terminal node via the first service node; and

    upon determining that the unique address assigned to the mobile station is associated with a prior connection with the terminal node via the first service node, reassigning at the terminal node the unique address to the mobile station upon an establishment of a new tunneled PPP connection between the mobile station and the terminal node via the second service node, said address associated with the mobile station and the new tunneled PPP connection established between the mobile station and the terminal node via the second service node; and

    terminating the tunneled PPP connection between the mobile station and the terminal node via the first service node, whereby performing mobility management for the mobile station in the communication network.

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