Mobile communication device receipt through second telecommunication network of call directed to registration in first telecommunication network

• US 20060211423A1
• Filed: 03/18/2005
• Published: 09/21/2006
• Est. Priority Date: 03/18/2005
• Status: Active Grant

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: Ejzak, Richard P., Gayde, Ruth Schaefer, Rudolph, Michael J.
• Granted Patent: US 8,218,462 B2
• Time in Patent Office: Days
• US Class Current: 455/445
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 68/12 Inter-network notification

Abstract

A network infrastructure device of an apparatus in one example comprises a first external interface and a second external interface. The network infrastructure device communicates with a first telecommunication network through the first external interface. The network infrastructure device communicates with a second telecommunication network through the second external interface. The network infrastructure device allows a mobile communication device that has a first registration in the first telecommunication network and a second registration in the second telecommunication network to receive, through the second telecommunication network, a call directed to the first registration. The first telecommunication network is unable to directly query the second telecommunication network for a status of the second registration.

Claims

1. An apparatus, comprising:

a network infrastructure device that comprises a first external interface and a second external interface;

wherein the network infrastructure device communicates with a first telecommunication network through the first external interface;

wherein the network infrastructure device communicates with a second telecommunication network through the second external interface;

wherein the network infrastructure device allows a mobile communication device that has a first registration in the first telecommunication network and a second registration in the second telecommunication network to receive, through the second telecommunication network, a call directed to the first registration;

wherein the first telecommunication network is unable to directly query the second telecommunication network for a status of the second registration.

2. The apparatus of claim 1, wherein the first telecommunication network comprises a circuit-switched telecommunication network;

wherein the second telecommunication network comprises a packet-switched telecommunication network;

wherein the network infrastructure device communicates with the circuit-switched telecommunication network through the first external interface;

wherein the network infrastructure device communicates with the packet-switched telecommunication network through the second external interface;

wherein the network infrastructure device allows a mobile communication device that has a first registration in the circuit-switched telecommunication network and a second registration in the packet-switched telecommunication network to receive, through the packet-switched telecommunication network, a call directed to the first registration.

3. The apparatus of claim 2, wherein the circuit-switched telecommunication network and the first external interface are compliant with an ANSI-41 or Mobile Application Part communication protocol;

wherein the packet-switched telecommunication network and the second external interface are compliant with an Internet Protocol Multimedia Subsystem standard.

4. The apparatus of claim 3, wherein the packet-switched telecommunication network is compliant with a Session Initiation Protocol communication protocol.

5. The apparatus of claim 1, wherein the network infrastructure device comprises a service control point component and an application server component;

wherein the service control point component emulates a service control point through the first external interface;

wherein the application server component emulates an application server through the second external interface;

wherein the service control point component communicates with the application server component through an internal interface.

6. The apparatus of claim 5, wherein the service control point component receives a query message from the first telecommunication network through the first external interface;

wherein the service control point component communicates the query message to the application server component through the internal interface;

wherein the application server component obtains a status of the second registration through the second external interface upon receipt of the query message;

wherein the network infrastructure device employs the status of the second registration to allow the mobile communication device to receive the call directed to the first registration through the second telecommunication network.

7. The apparatus of claim 6, wherein the application server component allocates a temporary routing number associated with the call, the second registration, and the application server component;

wherein the application server component communicates the temporary routing number to the service control point component through the internal interface;

wherein the service control point component communicates the temporary routing number to the first telecommunication network to allow the first telecommunication network to deliver the call directed to the first registration to the mobile communication device through the second telecommunication network.

8. The apparatus of claim 7, wherein the application server component receives an indication of a failed delivery of the call through the second telecommunication network;

wherein the application server component sends a redirect message to the second telecommunication network through the second external interface;

wherein the application server component sets a recent failure flag associated with the call to indicate the failed delivery of the call through the second telecommunication network;

wherein the application server component checks for the recent failure flag before obtaining the status of the second registration through the second external interface upon receipt of the query message;

wherein the application server component clears the recent failure flag after a pre-determined time interval and/or event.

9. A method, comprising the steps of:

receiving a query message, for a call to a mobile communication device, from a first telecommunication network through employment of a first network protocol; and

determining a registration status of the mobile communication device in a second telecommunication network through employment of a second network protocol to allow for a call delivery of the call through the second telecommunication network, wherein the first telecommunication network is unable to directly query the second telecommunication network for the registration status.

10. The method of claim 9, further comprising the step of:

sending a reply message to the first telecommunication network to initiate the delivery of the call through the second telecommunication network.

11. The method of claim 10, wherein the step of directing the call from the first telecommunication network through the second telecommunication network comprises the steps of:

allocating a temporary routing number for the call; and

communicating the temporary routing number to the first telecommunication network through employment of the first network protocol.

12. The method of claim 9, further comprising the step of:

receiving a failure indication for the delivery of the call through the second telecommunication network;

sending a redirect message to the second telecommunication network through employment of the second network protocol;

setting a recent failure flag associated with the failed delivery of the call through the second telecommunication network; and

clearing the recent failure flag after a pre-determined time interval and/or event.

13. The method of claim 12, wherein the step of determining the registration status of the mobile communication device in the second telecommunication network through employment of the second network protocol to allow for the delivery of the call through the second telecommunication network comprises the step of:

checking for an existence of the recent failure flag associated with the failed delivery of the call through the second telecommunication network.

14. The method of claim 13, further comprising the step of:

sending a continuation message to the first telecommunication network if the recent failure flag exists.

15. The method of claim 13, further comprising the step of:

determining the registration status of the mobile communication device in the second telecommunication network if the recent failure flag does not exist.

16. A method, comprising the steps of:

receiving, at a service control point component, a first query message from a mobile switching center of a legacy cellular network through employment of a legacy network protocol of the legacy cellular network, wherein the first query message comprises a dialed number associated with a call to a mobile communication device that is registered in the legacy cellular network;

sending, from the service control point component, a second query message that comprises the dialed number to an application server component;

checking, at the application server component, for an existence of a recent failure flag associated with the dialed number upon receipt of the second query message;

checking, at the application server component, if a temporary routing number is available;

sending, from the application server component, a continue message to the mobile switching center of the legacy cellular network through the service control point component, if the recent failure flag exists or the temporary routing number is not available, to cause a routing of the call through the legacy cellular network; and

performing, at the application server component, a call delivery of the call to the mobile communication device through an Internet Protocol Multimedia Subsystem network if the recent failure flag does not exist and the temporary routing number is available.

17. The method of claim 16, wherein the step of performing, at the application server component, the delivery of the call to the mobile communication device through the Internet Protocol Multimedia Subsystem network if the recent failure flag does not exist comprises the steps of:

sending, from the application server component, a third query message that comprises the dialed number to a home subscriber server of the Internet Protocol Multimedia Subsystem network through employment of an Internet Protocol network protocol of the Internet Protocol Multimedia Subsystem network;

receiving, at the application server component, a registration status associated with the mobile communication device from the home subscriber server;

sending, from the application server component, the continue message to the mobile switching center of the legacy cellular network through the service control point component if the registration status indicates that the mobile communication device is unavailable through the Internet Protocol Multimedia Subsystem network; and

performing, at the application server component, the delivery of the call to the mobile communication device through the Internet Protocol Multimedia Subsystem network if the registration status indicates that the mobile communication device is available through the Internet Protocol Multimedia Subsystem network.

18. The method of claim 17, wherein the step of performing, at the application server component, the delivery of the call to the mobile communication device through the Internet Protocol Multimedia Subsystem network if the registration status indicates that the mobile communication device is available through the Internet Protocol Multimedia Subsystem network comprises the steps of:

allocating, by the application server component, a temporary routing number, from a pool of temporary routing numbers, for the call to the mobile communication device;

associating, by the application server component, the temporary routing number with a public user ID associated with the mobile communication device;

sending, from the application server component, the temporary routing number to the service control point component;

sending, from the service control point component, a trigger result message that comprises the temporary routing number to the mobile switching center of the legacy cellular network;

receiving, at the application server component, a first invite message from an interrogating call session control function, wherein the invite message comprises the temporary routing number;

sending, from the application server component, a second invite message to the interrogating call session control function, wherein the second invite message comprises the public user ID associated with the mobile communication device; and

releasing, by the application server component, the temporary routing number to the pool of temporary routing numbers.

19. The method of claim 18, wherein the step of performing, at the application server component, the delivery of the call to the mobile communication device through the Internet Protocol Multimedia Subsystem network if the registration status indicates that the mobile communication device is available through the Internet Protocol Multimedia Subsystem network comprises the steps of:

receiving, at the application server component, an indication of a failed delivery of the call from the interrogating call session control function;

setting, at the application server component, a recent failure flag associated with the mobile communication device;

clearing, at the application server component, the recent failure flag after a pre-determined event;

sending, from the application server component, a redirect message that comprises the dialed number to the interrogating call session control function.

20. The method of claim 19, wherein the step of clearing, at the application server component, the recent failure flag after the pre-determined event comprises the step of:

starting a timer upon an event;

clearing the recent failure flag, at the application server component, after an expiration of the timer.