Abstract
The present invention moves service control including call control for a user element from a cellular network to a multimedia subsystem (MS) such as the Internet Protocol (IP) Multimedia Subsystem (IMS). Call control is provided by the MS irrespective of whether the user element is using cellular or WLAN access for the call. Call control for originating and terminating calls in the CS or MS as well as transferring calls between a circuit-switched subsystem (CS) and MS is anchored at a continuity control function (CCF) in the MS. All call signaling for the call is passed through the CCF. The CCF is a service provided in the user elements home MS and anchors the user elements active CS calls and MS sessions to enable active roaming across the CS and MS.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
| 4G,3G,2G | 22/10/2007 | ISLD-200711-002 | NORTEL NETWORKS LIMITED | Yes | Basis Patent | ||||
| 3G | 22/10/2007 | ISLD-200711-003 | NORTEL NETWORKS LIMITED | Yes | Basis Patent | ||||
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| 5G,4G,3G,2G | 16/10/2023 | ISLD-202310-048 | ERICSSON INC | Yes | Basis Patent | ||||
| 4G,3G,2G | 25/01/2024 | ISLD-202401-020 | ERICSSON INC | Yes | Basis Patent | ||||
Specification Information
Specification Information
Technologies
Family Information
| All Granted Patents In Patent Family : | ---- |
| All Pending Patents In Patent Family : | ---- |
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Yes | Basis Patent | |||
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Session Management
Product
Use Cases
Wireless communication
Services
Claim
1. A method of providing a continuity control function comprising:
providing a signaling anchor point in a multimedia subsystem for a first access signaling leg and a remote access signaling leg that initially form a signaling path for a call between a user element and a remote endpoint, the first access signaling leg being connected to the user element via a transferring-out subsystem;
establishing a second access signaling leg toward a user element via a transferring-in subsystem;
replacing the first access signaling leg with the second access signaling leg to update the signaling path, such that the second leg is anchored at the signaling anchor point;
providing call signaling via the signaling path to transfer at least a portion of a bearer path used for the call between the user element and the remote endpoint, from a first network to a second network while maintaining continuity of the call, wherein the transferring-out subsystem is circuit-switched subsystem or the multimedia subsystem, and the transferring-in subsystem is the multimedia system or the circuit-switched subsystem, respectively, thereby the method transferring calls from the circuit-switched subsystem to the multimedia subsystem and transferring calls from the multimedia subsystem to the circuit-switched subsystem;
receiving a request intended for the continuity control function to originate the call from the user element to the remote endpoint;
terminating the first access signaling leg;
identifying an address or number associated with the remote endpoint; and
establishing the remote signaling leg for the call toward the remote endpoint using the address or number; wherein the user element will initiate a call to the continuity control function;', 'providing a signaling anchor point in a multimedia subsystem for a first access signaling leg and a remote access signaling leg that initially form a signaling path for a call between a user element and a remote endpoint, the first access signaling leg being connected to the user element via a transferring-out subsystem;', 'establishing a second access signaling leg toward a user element via a transferring-in subsystem;', 'replacing the first access signaling leg with the second access signaling leg to update the signaling path, such that the second leg is anchored at the signaling anchor point;', 'providing call signaling via the signaling path to transfer at least a portion of a bearer path used for the call between the user element and the remote endpoint, from a first network to a second network while maintaining continuity of the call, wherein the transferring-out subsystem is circuit-switched subsystem or the multimedia subsystem, and the transferring-in subsystem is the multimedia system or the circuit-switched subsystem, respectively, thereby the method transferring calls from the circuit-switched subsystem to the multimedia subsystem and transferring calls from the multimedia subsystem to the circuit-switched subsystem;', 'receiving a request intended for the continuity control function to originate the call from the user element to the remote endpoint;', 'terminating the first access signaling leg;', 'identifying an address or number associated with the remote endpoint; and', 'establishing the remote signaling leg for the call toward the remote endpoint using the address or number; wherein the user element will initiate a call to the continuity control function;', 'wherein the address or number for the remote endpoint is identified from a message separate from the request and wherein the message is sent via a Unstructed Supplementary Service Data (USSD) channel.
2. The method of claim 1 further comprising receiving from the user element a request to establish the second access signaling leg and a request to transfer the call via the transferring-in subsystem.
3. The method of claim 2 wherein the request is generated from the user element when the user element determines a need to transfer the call.
4. The method of claim 2 wherein the request is originated from the user element using at least one of a multimedia subsystem address for the continuity control function, which provides the anchor point, and a directory number within a circuit-switched subsystem, which is associated with the multimedia subsystem address.
5. The method of claim 1 further comprising releasing the first access signaling leg via the transferring-out subsystem.
6. The method of claim 1 further comprising coordinating call signaling exchanges for the call via the second access signaling leg and the remote signaling leg.
7. The method of claim 1, wherein access to the one of the transferring-in subsystem and the transferring-out subsystem is provided via local wireless access outside of the circuit-switched subsystem.
8. The method of claim 7 wherein the local wireless access supports packet-based communications and the circuit-switched subsystem supports circuit-switched communications.
9. The method of claim 1, wherein the circuit switched subsystem is provided by a cellular network
10. The method of claim 1 wherein when the call is originated from the user element, the continuity control function is invoked as a first service of a plurality of services to be provided in a call signaling path formed by the first access signaling leg and the remote signaling leg, such that all of the plurality of services other than the continuity control function are provided in the remote signaling leg, and the remote signaling leg is anchored at the continuity control function
11. The method of claim 1 wherein when the call is terminated at the user element, the continuity control function is invoked as a last service of a plurality of services to be provided in a call signaling path formed by the first access signaling leg and the remote signaling leg, such that all of the plurality of services other than the continuity control function are provided in the remote signaling leg, and the remote signaling leg is anchored at the continuity control function
12. The method of claim 1 wherein the address or number for the remote endpoint is obtained from the request
13. The method of claim 1 wherein the continuity control function resides in a home multimedia subsystem and is invoked as a service by a serving call/session control function for calls from or intended for the user element
14. The method of claim 1 further comprising effecting subsequent transfers between the transferring-in subsystem and the transferring-out subsystem
15. A node for providing a continuity control function comprising:
a communication interface; and
a control system associated with the communication interface and configured to:
provide a signaling anchor point in a multimedia subsystem for a first access signaling leg and a remote access signaling leg that initially form a signaling path for a call between a user element and a remote endpoint, the first access signaling leg being connected to the user element via a transferring-out subsystem;
establish a second access signaling leg toward the user element via a transferring-in subsystem;
replace the first access signaling leg with the second access signaling leg to update the signaling path, such that the second access signaling leg is anchored at the signaling anchor point while maintaining continuity of the call;
provide call signaling via the signaling path to transfer at least a portion of a bearer path used for the call between the user element and the remote endpoint, from a first network to a second network;', 'a communication interface; and', 'a control system associated with the communication interface and configured to:', 'provide a signaling anchor point in a multimedia subsystem for a first access signaling leg and a remote access signaling leg that initially form a signaling path for a call between a user element and a remote endpoint, the first access signaling leg being connected to the user element via a transferring-out subsystem;', 'establish a second access signaling leg toward the user element via a transferring-in subsystem;', 'replace the first access signaling leg with the second access signaling leg to update the signaling path, such that the second access signaling leg is anchored at the signaling anchor point while maintaining continuity of the call;', 'provide call signaling via the signaling path to transfer at least a portion of a bearer path used for the call between the user element and the remote endpoint, from a first network to a second network;', 'wherein the transferring-out subsystem is a circuit-switched subsystem or the multimedia subsystem, and the transferring-in subsystem is the multimedia system or the circuit-switched subsystem, respectively, thereby the control system being configured to transfer calls from the circuit-switched subsystem to the multimedia subsystem and to transfer calls from the multimedia subsystem to the circuit-switched subsystem;
receive a request intended for the continuity control function to originate the call from the user element to the remote endpoint; terminate the first access signaling leg;
identify an address or number associated with the remote endpoint; and
establish the remote signaling leg for the call toward the remote endpoint using the address or number; wherein the user element will initiate a call to the continuity control function;', 'receive a request intended for the continuity control function to originate the call from the user element to the remote endpoint; terminate the first access signaling leg;', 'identify an address or number associated with the remote endpoint; and', 'establish the remote signaling leg for the call toward the remote endpoint using the address or number; wherein the user element will initiate a call to the continuity control function;', 'wherein the address or number for the remote endpoint is identified from a message separate from the request and wherein the message is sent via a Unstructured Supplementary Service Data (USSD) channel.16. The node of claim 15 wherein the control system is further adapted to receive from the user element a request to establish the second access signaling leg and a request to transfer the call via the transferring-in subsystem.17. The node of claim 16 wherein the request is originated from the user element using at least one of a multimedia subsystem address for the continuity control function, which provides the anchor point, and a directory number within a circuit-switched subsystem, which is associated with the multimedia subsystem address.18. The node of claim 15 wherein access to the one of the transferring-in subsystem and the transferring-out subsystem is provided via local wireless access outside of the circuit-switched subsystem.19. The node of claim 15 wherein when the call is originated from the user element, the continuity control function is invoked as a first service of a plurality of services to be provided in a call signaling path formed by the first access signaling leg and the remote signaling leg, such that all of the plurality of services other than the continuity control function are provided in the remote signaling leg, and the remote signaling leg is anchored at the continuity control function.
20. The node of claim 15 wherein when the call is terminated at the user element, the continuity control function is invoked as a last service of a plurality of services to be provided in a call signaling path formed by the first access signaling leg and the remote signaling leg, such that all of the plurality of services other than the continuity control function are provided in the remote signaling leg, and the remote signaling leg is anchored at the continuity control function.
21. The node of claim 15 wherein the address or number for the remote endpoint is obtained from the request.
22. The node of claim 15 wherein the control system is further adapted to effect subsequent transfers between the transferring-in subsystem and the transferring-out subsystem.']
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.