Handing off active connections
First Claim
1. A method performed in a radio access network, the method comprising:
- establishing a session between an access terminal and a first radio network controller through a first radio node, the first radio node being controllable primarily by the first radio network controller,maintaining the session with the first radio network controller as the access terminal moves from a coverage area of the first radio node toward a coverage area of a second radio node, the second radio node being controllable primarily by a second radio network controller and controllable subordinately by the first radio network controller,establishing a route for the session established with the first radio network controller through the second radio node, andresponsive to determining that an active set of the access terminal contains only radio nodes which are subordinately controlled by the first radio network controller, initiating an active handoff from the first radio network controller of a first subnet to the second radio network controller of a second subnet including transferring the session from the first radio network controller to the second radio network controller without dropping an active call associated with the session,wherein the first and second radio network controllers are located in different subnets of the radio access network.
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Accused Products
Abstract
A connection is established between an access terminal and a first radio network controller through a first radio node. The first radio node is controllable primarily by the first radio network controller. The connection is maintained with the first radio network controller as the access terminal moves from a coverage area of the first radio node toward a coverage area of a second radio node. The second radio node is controllable primarily by a second radio network controller and controllable subordinately by the first radio network controller. A connection is also established through the second radio node. Upon a fulfillment of a predetermined criterion, the connection is transferred from the first radio network controller to the second radio network controller.
268 Citations
14 Claims
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1. A method performed in a radio access network, the method comprising:
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establishing a session between an access terminal and a first radio network controller through a first radio node, the first radio node being controllable primarily by the first radio network controller, maintaining the session with the first radio network controller as the access terminal moves from a coverage area of the first radio node toward a coverage area of a second radio node, the second radio node being controllable primarily by a second radio network controller and controllable subordinately by the first radio network controller, establishing a route for the session established with the first radio network controller through the second radio node, and responsive to determining that an active set of the access terminal contains only radio nodes which are subordinately controlled by the first radio network controller, initiating an active handoff from the first radio network controller of a first subnet to the second radio network controller of a second subnet including transferring the session from the first radio network controller to the second radio network controller without dropping an active call associated with the session, wherein the first and second radio network controllers are located in different subnets of the radio access network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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a first radio network controller to; establish a session with an access terminal through a first radio node, the first radio node being controllable primarily by the first radio network controller, maintain the session as the access terminal moves from the coverage area of the first radio node toward a coverage area of a second radio node, the second radio node being controllable primarily by a second radio network controller and controllable subordinately by the first radio network controller, establish a route for the session established with the first radio network controller through the second radio node, and responsive to determining that an active set of the access terminal contains only radio nodes which are subordinately controlled by the first radio network controller, initiate an active handoff from the first radio network controller of a first subnet to the second radio network controller of a second subnet including transferring the session from the first radio network controller to the second radio network controller without dropping an active call associated with the session, wherein the first and second radio network controllers are located in different subnets of a radio access network.
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12. A computer program stored on a non-transitory machine-readable storage medium, comprising instructions to cause a radio network controller to:
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establish a session to an access terminal through a first radio node, the first radio node being controllable primarily by the first radio network controller, maintain the session as the access terminal moves from the coverage area of the first radio node toward the coverage area of a second radio node, the second radio node being controllable primarily by a second radio network controller and controllable subordinately by the first radio network controller, establish a route for the session established with the first radio network controller through the second radio node, and responsive to determining that an active set of the access terminal contains only radio nodes which are subordinately controlled by the first radio network controller, initiating an active handoff from the first radio network controller of a first subnet to the second radio network controller of a second subnet including transferring the session from the first radio network controller to the second radio network controller without dropping an active call associated with the session, wherein the first and second radio network controllers are located in different subnets of a radio access network.
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13. A system comprising:
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a first radio network controller, a second radio network controller, a first radio node, and a second radio node, the first and second radio network controllers being located in different subnets of a radio access network, which is; the first radio network controller is configured to establish a session to an access terminal through the first radio node, the first radio node being controlled primarily by the first radio network controller, the first radio network controller is configured to maintain the session as the access terminal moves from the coverage area of the first radio node toward the coverage area of the second radio node, the second radio node being controllable primarily by the second radio network controller and controllable subordinately by the first radio network controller, the first radio network controller is configured to re-route the session established with the first radio network controller through the second radio node, the first radio node controller is configured to, responsive to determining that an active set of the access terminal contains only radio nodes which are subordinately controlled by the first radio network controller, initiate an active handoff from the first radio network controller of a first subnet to the second radio network controller of a second subnet including transferring the session from the first radio network controller to the second radio network controller without dropping an active call associated with the session; and the second radio network controller is configured to assume control of the session upon the fulfillment of a first predetermined criterion. - View Dependent Claims (14)
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Specification