Methods and systems for controlling a user device in a telecommunication network

1. A method of controlling a user device in a telecommunications network, the method comprising:

receiving, at the user device, a first communication session setup request to set up a given communication session, wherein the user device comprises at least a first communication interface capable of communicating via a first part of the telecommunications network and a second communication interface capable of communicating via a second, different part of the telecommunications network, and wherein the first communication session setup request is directed to the first communication interface;

receiving, at the user device, a communication notification in relation to the same given communication session, the communication notification being directed to the second communication interface;

establishing, at the user device, the given communication session via the first communication interface via the first part of the telecommunications network; and

after having established the given communication session via the first communication interface, activating, at the user device, an alert function to alert a user of the user device to the availability of the second communication interface at least on the basis of having received the communication availability notification.

2. The method of claim 1 , wherein the communication notification comprises a second communication session setup request to set up the same given communication session.

3. The method of claim 1 , further comprising transmitting a response to the first communication session setup request, whereby to establish a communication session via the first part of the telecommunications network.

4. The method of claim 1 , further comprising determining that a communication session has been established via the first part of the telecommunications network, wherein the alert mechanism is conditionally activated on the basis of the determination.

5. The method of claim 1 , wherein the alert mechanism is activated in response to a timer function reaching a predetermined time threshold.

6. The method of claim 5 , wherein the timer function is initiated in response to receipt of the first communication session setup request.

7. The method of claim 5 , wherein the timer function is activated in response to receipt of the second communication session setup request.

8. The method of claim 1 , further comprising:

receiving, via a user interface of the user device, user input from the user associated with rerouting the communication session via the second part of the telecommunications network, and

transmitting a communication session transfer request, the transmitted communication session transfer request being operable to transfer the established communication session from the first communication interface to the second communication interface.

9. The method of claim 8 , further comprising receiving a subsequent communication session setup request to set up the same given communication session, the subsequent communication session setup request being directed to the second communication interface.

10. The method of claim 9 , further comprising:

verifying that the subsequent communication session setup request relates to the given communication session, and

transmitting a communication session acceptance message from the second communication interface in response to verifying that the subsequent communication session setup request relates to the given communication session.

11. The method of claim 10 , wherein the verifying step comprises identifying, in the subsequent communication session setup request, an identifier associated with the given communication session.

12. The method of claim 10 , wherein the verifying step comprises identifying, in the communication session setup request, an identifier associated the user device.

13. The method of claim 12 , wherein the identifier is associated with a communication client equipped to the user device.

14. The method of claim 1 , wherein the first communication interface and the second communication interface are associated with different access technologies.

15. The method of claim 1 , wherein the first communication session setup request is directed to a first communication client associated with the first communication interface and the communication notification is directed to a second communication client associated with the second communication interface.

16. A system for use in controlling a user device in a telecommunications network, the user device comprising at least a first communication interface capable of communicating via a first part of the telecommunications network and a second communication interface capable of communicating via a second, different part of the telecommunications network, the system comprising:

a data store comprising executable software; and

at least one processor in data communication with the data store, the processor configured to execute the software and causes a computing device to:

receive a first communication session setup request to set up a given communication session, the first communication session setup request being directed to the first communication interface;

receive a communication notification in relation to the same given communication session, the communication notification being directed to the second communication interface;

establish the given communication session via the first communication interface via the first part of the telecommunications network; and

after having established the given communication session via the first communication interface, activate an alert function to alert a user of the user device to the availability of the second communication interface at least on the basis of having received the communication availability notification.

17. A non-transitory computer-readable storage medium having computer-executable instructions stored thereon which, when executed by a processor, cause a computing device to perform a method of controlling a user device in a telecommunications network, the method comprising:

receiving, at the user device, a first communication session setup request to set up a given communication session, wherein the user device comprises at least a first communication interface capable of communicating via a first part of the telecommunications network and a second, communication interface capable of communicating via a second, different part of the telecommunications network, and wherein the first communication session setup request is directed to the first communication interface;

receiving, at the user device, a communication notification in relation to the same given communication session, the communication notification being directed to the second communication interface;

establishing, at the user device, a the given communication session via the first communication interface via the first part of the telecommunications network; and

after having established the given communication session via the first communication interface, activating, at the user device, an alert function to alert a user of the user device to the availability of the second communication interface at least on the basis of having received the communication availability notification.

18. A method of controlling a given communication session in a telecommunications network between a first communication device associated with a first party and a second communication device associated with a second party, the method comprising:

receiving, at a call control system in the telecommunications network, from the second communication device, an initial communication session setup request to set up the given communication session;

in response to receipt of initial communication session setup request, transmitting, from the call control system in the telecommunications network, a first communication session setup request to set up the given communication session, the first communication session setup request being directed to a first communication interface on the first communication device, wherein the communication is capable of communication via a first part of the telecommunications network, and wherein the first communication device comprises at least the first communication interface and a second communication interface capable of communicating via a second, different part of the telecommunications network;

in response to receipt of the initial communication session setup request, transmitting, from the call control system in the telecommunications network a communication notification in relation to the same given communication session, the communication notification being directed to the second communication interface on the first communication device;

establishing, at a call control system in the telecommunications network, a first communication session leg between an intermediate node in the telecommunications network and the first communication device via the first communication interface and the first part of the telecommunications network;

after having established the first communication session leg to the first communication interface, receiving, at a call control system in the telecommunications network, a communication session transfer request; and

establishing, at a call control system in the telecommunications network, a second communication session leg between an intermediate node in the telecommunications network and the first communication device via the second communication interface and the second part of the telecommunications network in response to receiving the communication session transfer request.

19. The method of claim 18 , wherein the communication notification comprises a second communication session setup request to set up the same given communication session.

20. The method according claim 19 , further comprising establishing a third communication session leg between an intermediate node in the telecommunications network and the second communication device, the method comprising maintaining the third communication session leg subsequent receiving the communication session transfer request.

21. A method of controlling a user device in a telecommunications network, the method comprising:

receiving, at the user device, a first communication session setup request to set up a given communication session, wherein the user device comprises at least a first communication interface capable of communicating via a first part of the telecommunications network and a second communication interface capable of communicating via a second, different part of the telecommunications network, and wherein first communication session setup request is directed to the first communication interface;

receiving a communication notification in relation to the same given communication session, the communication notification being directed to the second communication interface;

establishing the given communication session via the first communication interface via the first part of the telecommunications network; and

after having established the given communication session via the first communication interface, transferring the given communication session to the second communication interface at least based on having received the communication availability notification, wherein transfer of the given communication session comprises;

transmitting a communication session transfer request, the transmitted communication session transfer request being operable to transfer the established communication session from the first communication interface to the second communication interface; and

receiving a subsequent communication session setup request to set up the same given communication session, the subsequent communication session setup request being directed to the second communication interface.