Method and system for maintaining session continuity when changes occur at the terminal during a session
DCFirst Claim
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.
1 Assignment
Litigations
2 Petitions
Accused Products
Abstract
A method and a system for maintaining session continuity, in which the system includes a Handover Source Function (HOSF), a Handover Destination Function (HODF), a Handover Anchor Function-Control Plane (HOAF-CP) and a Handover Anchor Function-User Plane (HOAF-UP). The method includes a first user establishing a connection through the HOSF with the HOAF-CP and the HOAF-UP which correspond to a second user, so as to establish a session with the second user. The method further includes that, during session handover, the HODF that corresponds to the HOSF establishing another connection with the HOAF-CP and HOAF-UP though which the first user continues the session with the second user, so as to maintain the session continuity. When access address or access technology of the terminal changes, or even the terminal changes during a session, the method and the system can logically replace the connection before the handover with a new connection to ensure the session continuity.
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Citations
41 Claims
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1. A method for maintaining session continuity, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A system for maintaining session continuity, comprising:
- a Handover Source Function (HOSF), a Handover Destination Function (HODF), a Handover Anchor Function-Control Plane (HOAF-CP), a Handover Anchor Function-User Plane (HOAF-UP) and a Handover Detection Function;
wherein the HOSF and the HODF are located in a same terminal of a first user or different terminals of the first user, the HOAF-CP is located on a home network side of the first user, the HOAF-UP is located on a terminal side of a second user, and the HOAF-CP is a control resource;the HOSF is configured to establish a first connection comprising a control plane first connection between the HOSF and the HOAF-CP and a user plane first connection between the HOSF and the HOAF-UP when the first user initiates or accepts a session; the HODF is configured to establish a second connection comprising a control plane second connection between the HODF and the HOAF-CP and a user plane second connection between the HODF and the HOAF-UP when a handover condition is satisfied; the HOAF-CP is configured to establish the control plane first connection between the HOSF and the HOAF-CP when the first user initiates or accepts the session;
establish a control plane connection between the terminal side of the second user and the HOAF-CP;
establish the control plane second connection between the HODF and the HOAF-CP when the handover condition is satisfied;
the HOAF-CP is further configured to perform control over the control plane first connection, the control plane second connection and the control plane connection with the terminal side of the second user, and replace the control plane first connection between the HOSF and the HOAF-CP with the control plane second connection between the HODF and the HOAF-CP;the HOAF-UP is configured to establish the user plane first connection between the HOSF and the HOAF-UP during the establishment of the control plan first connection and the control plane connection between the HOAF-CP and the terminal side of the second user;
establish the user plane second connection between the HODF and the HOAF-UP during the establishment of the control plan second connection; and
replace the user plane first connection with the user plane second connection; andthe Handover Detection Function is configured to detect whether the handover condition is satisfied. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38)
- a Handover Source Function (HOSF), a Handover Destination Function (HODF), a Handover Anchor Function-Control Plane (HOAF-CP), a Handover Anchor Function-User Plane (HOAF-UP) and a Handover Detection Function;
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39. A system for maintaining session continuity, comprising:
- a Handover Source Function (HOSF), a Handover Destination Function (HODF), a Handover Anchor Function-Control Plane (HOAF-CP), a Handover Anchor Function-User Plane (HOAF-UP) and a Handover Detection Function;
wherein the HOSF and the HODF are located in a same terminal or different terminals of a first user, the HOAF-CP and HOAF-UP are located on a home network side of the first user, the HOAF-CP is control resource, the HOAF-UP is media resource;the HOSF is configured to establish a first connection comprising a control plane first connection between the HOSF and the HOAF-CP and a user plane first connection between the HOSF and the HOAF-UP when the first user initiates or accepts a session; the HODF is configured to establish a second connection comprising a control plane second connection between the HODF and the HOAF-CP and a user plane second connection between the HODF and the HOAF-UP when a handover condition is satisfied; the HOAF-CP is configured to establish the control plane first connection between the HOSF and the HOAF-CP when the first user initiates or accepts the session;
establish a control plane connection between a terminal side of a second user and the HOAF-CP;
establish the control plane second connection between the HODF and the HOAF-CP when the handover condition is satisfied;
the HOAF-CP is further configured to perform control over the control plane first connection, the control plane second connection and the control plane connection between the terminal side of the second user and the HOAF-CP, replace the control plane first connection between the HOSF and the HOAF-CP with the control plane second connection between the HODF and the HOAF-CP;the HOAF-UP is configured to establish the user plane first connection between the HOSF and the HOAF-UP;
establish a user plane connection between the terminal side of the second user and the HOAF-UP, and connect the user plane connection between the HOAF-UP and the terminal side of the second user with the user plane first connection;
establish the user plane second connection between the HODF and the HOAF-UP; and
connect the user plane connection between the HOAF-UP and the terminal side of the second user with the user plane second connection instead of the user plane first connection; andthe Handover Detection Function is configured to detect whether the handover condition is satisfied. - View Dependent Claims (40)
- a Handover Source Function (HOSF), a Handover Destination Function (HODF), a Handover Anchor Function-Control Plane (HOAF-CP), a Handover Anchor Function-User Plane (HOAF-UP) and a Handover Detection Function;
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41. A method for maintaining session continuity, comprising:
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triggering a Handover Anchor Function-Control Plane (HOAF-CP) on a home network side of a first user, and establishing a first connection comprising 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) on the home network side of the first user, establishing a control plane connection between the HOAF-CP and a terminal side of a second user and a user plane connection between the HOAF-UP and the terminal side of the second user, and establishing a session between the first user and the second user through the control plane first connection, the control plane connection between the HOAF-CP and the terminal side of the second user, the user plane first connection, and the user plane connection between the HOAF-UP and the terminal side of the second user; determining that a handover condition is satisfied, 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; continuing the session between the first user and the second user through the control plane second connection between the HODF of the first user and the HOAF-CP and the control plane connection between the HOAF-CP and the terminal side of the second user, and the user plane second connection between the HODF of the first user and the HOAF-UP and the user plane connection between the HOAF-UP and the terminal side of the second user.
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Specification