Recovery from a potential proxy call session control function (P-CSCF) failure during call origination

1. A method comprising:

forwarding, by a processor associated with a user device, a registration request to an Internet protocol (IP) multimedia subsystem (IMS) to assign the user device to a proxy-call session control function device (P-CSCF) associated with the IMS;

receiving, at the processor, information identifying a plurality of P-CSCFs including the P-CSCF;

forwarding, by the processor, a message to the P-CSCF requesting a session via the IMS for an IMS call;

determining, by the processor, that a response to the message is not received from the P-CSCF during a particular time period;

registering, by the processor and based on determining that the response is not received during the particular time period, the user device with a second P-CSCF of the plurality of P-CSCFs; and

sending, by the processor, the message to the second P-CSCF based on registering the user device with the second P-CSCF.

2. The method of claim 1 , further comprising:

declaring a call failure when a response to the message to the second P-CSCF is not received from the second P-CSCF during a second time period.

3. The method of claim 1 , further comprising:

re-forwarding the message to the P-CSCF requesting the session via the IMS during the particular time period.

4. The method of claim 1 , further comprising:

receiving an error message during the particular time period; and

registering the user device with the second P-CSCF in response to receiving the error message.

5. The method of claim 1 , wherein the message is a session initiation protocol (SIP) invite message.

6. The method of claim 1 , wherein a length of the particular time period varies based on a wireless environment associated with the message.

7. The method of claim 1 , wherein the response to the message includes an acknowledgment message indicating that the P-CSCF has received and is processing the message.

8. A device comprising:

a memory to store instructions; and

a processor configured to execute one or more of the instructions to:

forward a registration request to an Internet protocol (IP) multimedia subsystem (IMS) to assign the device to a proxy-call session control function device (P-CSCF) associated with the IMS;

receive information identifying a plurality of P-CSCFs including the P-CSCF;

forward a message to the P-CSCF requesting a session via the IMS for an IMS call;

determine that a response to the message is not received from the P-CSCF during a particular time period;

register, based on determining that the response is not received during the particular time period, the device with a second P-CSCF of the plurality of P-CSCFs; and

send the message to the second P-CSCF based on registering the device with the second P-CSCF.

9. The device of claim 8 , wherein the processor is further configured to:

declare a call failure when a response to the message to the second P-CSCF is not received from the second P-CSCF during a second time period.

10. The device of claim 8 , wherein the processor is further configured to:

re-forward the message to the P-CSCF requesting the session via the IMS during the particular time period.

11. The device of claim 8 , wherein the processor is further configured to:

receive an error message during the particular time period; and

register the device with the second P-CSCF in response to receiving the error message.

12. The device of claim 8 , wherein the message is a session initiation protocol (SIP) invite message.

13. The device of claim 8 , wherein a length of the particular time period varies based on a wireless environment associated with the message.

14. The device of claim 8 , wherein the response to the message includes an acknowledgment message indicating that the P-CSCF has received and is processing the message.

15. A non-transitory computer-readable medium configured to store instruction, the instructions comprising:

one or more instructions that, when executed by a processor associated with a device, cause the processor to:

forward a registration request to an Internet protocol (IP) multimedia subsystem (IMS) to assign the device to a proxy-call session control function device (P-CSCF) associated with the IMS;

receive information identifying a plurality of P-CSCFs including the P-CSCF;

forward a message to the P-CSCF requesting a session via the IMS for an IMS call;

determine that a response to the message is not received from the P-CSCF during a particular time period;

register, based on determining that the response is not received during the particular time period, the device with a second P-CSCF of the plurality of P-CSCFs; and

send the message to the second P-CSCF based on registering the device with the second P-CSCF.

16. The non-transitory computer-readable medium of claim 15 , wherein the one or more instructions further cause the processor to:

declare a call failure when a response to the message to the second P-CSCF is not received from the second P-CSCF during a second time period.

17. The non-transitory computer-readable medium of claim 15 , wherein the one or more instructions further cause the processor to:

re-forward the message to the P-CSCF requesting the session via the IMS during the particular time period.

18. The non-transitory computer-readable medium of claim 15 , wherein the one or more instructions further cause the processor to:

receive an error message during the particular time period; and

register the device with the second P-CSCF in response to receiving the error message.

19. The non-transitory computer-readable medium of claim 15 , wherein the message is a session initiation protocol (SIP) invite message.

20. The non-transitory computer-readable medium of claim 15 , wherein the response to the message includes an acknowledgment message indicating that the P-CSCF has received and is processing the message.