Transfer of emergency services session between disparate subsystems
First Claim
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1. A method comprising:
- providing, by a control system, a signaling anchor point at a domain transfer function in a visited multimedia subsystem for a first access signaling leg and a remote access signaling leg for a communication session between a user element and a public service access point, wherein the public service access point is provided original location information bearing on the location of the user element and updated location information bearing on the location of the user element;
coordinating call signaling for the communication session via the first access signaling leg and the remote signaling leg;
receiving a session initiation message responsive to initiation of a new communication session via a transferring-in subsystem to effect a transfer from a transferring-out subsystem to the transferring-in subsystem;
detecting an existence of the communication session with the user element when the session initiation message is received; and
establishing a second access signaling leg for the communication session in response to the detecting the existence of the communication session.
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Abstract
Methods and nodes for coordinating communication sessions are described herein. A method includes providing, by a control system, a signaling anchor point at a domain transfer function in a visited multimedia subsystem for an access signaling leg and a remote access signaling leg for a communication session between a user element and a public service access point and coordinating call signaling for the communication session via the access signaling leg and the remote signaling leg.
22 Citations
22 Claims
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1. A method comprising:
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providing, by a control system, a signaling anchor point at a domain transfer function in a visited multimedia subsystem for a first access signaling leg and a remote access signaling leg for a communication session between a user element and a public service access point, wherein the public service access point is provided original location information bearing on the location of the user element and updated location information bearing on the location of the user element; coordinating call signaling for the communication session via the first access signaling leg and the remote signaling leg; receiving a session initiation message responsive to initiation of a new communication session via a transferring-in subsystem to effect a transfer from a transferring-out subsystem to the transferring-in subsystem; detecting an existence of the communication session with the user element when the session initiation message is received; and establishing a second access signaling leg for the communication session in response to the detecting the existence of the communication session. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A node for providing a continuity control function comprising:
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a communication interface; and a control system associated with the communication interface and adapted to; provide a signaling anchor point at a domain transfer function in a visited multimedia subsystem for a first access signaling leg and a remote access signaling leg for a communication session between a user element and a public service access point, the first access signaling leg provided for the user element via a transferring-out subsystem, wherein the public service access point is provided original location information bearing on the location of the user element and updated location information bearing on the location of the user element; coordinate call signaling for the communication session via the first access signaling leg and the remote signaling leg; receive a session initiation message responsive to initiation of a new communication session via a transferring-in subsystem to effect a transfer from a transferring-out subsystem to a transferring-in subsystem that provides the access signaling leg for the user element; detect an existence of the communication session with the user element when the session initiation message is received; and establish a second access signaling leg for the communication session toward a user element via the transferring-in subsystem in response to detecting the existence of the communication session. - View Dependent Claims (19, 20, 21, 22)
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Specification