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Method and system for maintaining session continuity when changes occur at the terminal during a session

DC
  • US 8,625,527 B2
  • Filed: 01/03/2007
  • Issued: 01/07/2014
  • Est. Priority Date: 12/17/2004
  • Status: Expired
First Claim
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1. A method for maintaining session continuity, comprising:

  • triggering a Handover Anchor Function-Control Plane (HOAF-CP) on a home network side of a first user, and establishing a first connection, wherein the first connection comprises a control plane first connection between a Handover Source Function (HOSF) of the first user and the HOAF-CP and a user plane first connection between the HOSF and a Handover Anchor Function-User Plane (HOAF-UP) of a second user;

    establishing a control plane connection between the HOAF-CP and a terminal side of the second user, and establishing a session between the first user and the second user through the user plane first connection, the control plane first connection and the control plane connection between the HOAF-CP and a terminal side of the second user;

    determining that a handover condition is satisfied, and establishing a second connection, wherein the second connection comprises a control plane second connection between a Handover Destination Function (HODF) of the first user and the HOAF-CP and a user plane second connection between the HODF and the HOAF-UP; and

    continuing the session between the first user and the second user through the user plane second connection between the HODF and the HOAF-UP, the control plane second connection between the HODF and the HOAF-CP, and the control plane connection, which is already established between the HOAF-CP and the terminal side of the second user before the handover condition is satisfied.

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