Method and system for incoming call notification

1. A method of incoming call notification for a mobile station, said mobile station being connected to at least one call over an air interface, said method comprising:

detecting a request to connect an incoming call to said mobile station;

making a determination that said mobile station is fully engaged such that said mobile station cannot be connected to said incoming call without being disconnected from at least one of said at least one call; and

in response to said determination, transmitting an incoming call notification to said mobile station.

2. The method of claim 1 , further comprising:

in response to said incoming call notification, said mobile station providing a user-discernible indication.

3. The method of claim 2 , wherein providing a user-discernible indication includes said mobile station visibly displaying an incoming call notification message.

4. The method of claim 3 , wherein said incoming call notification message identifies said incoming call.

5. The method of claim 4 , wherein said incoming call notification message includes text identifying a calling party of said incoming call.

6. The method of claim 5 , wherein said text includes a telephone number of said calling party.

7. The method of claim 1 , further comprising:

receiving an incoming call acceptance from said mobile station; and

in response to said incoming call acceptance, disconnecting at least one of said at least one call and connecting said incoming call.

8. The method of claim 1 , wherein said at least one call includes a voice call.

9. The method of claim 8 , wherein transmitting an incoming call notification to said mobile station includes transmitting a short message service (SMS) message to said mobile station.

10. The method of claim 1 , wherein said at least one call includes an active data session.

11. The method of claim 10 , wherein transmitting an incoming call notification to said mobile station includes transmitting a packet protocol message to said mobile station.

12. The method of claim 11 , wherein said packet protocol message is a session initiation protocol (SIP) message.

13. The method of claim 12 , further comprising:

receiving an incoming call acceptance from said mobile station; and

in response to said incoming call acceptance, disconnecting said active data session and connecting said incoming call.

14. The method of claim 1 , wherein said at least one call includes a first voice call and a second voice call.

15. The method of claim 14 , further comprising:

receiving an incoming call acceptance from said mobile station; and

in response to said incoming call acceptance, disconnecting said first voice call and said second voice call and connecting said incoming call.

16. The method of claim 1 , wherein said at least one call includes a voice call and an active data session.

17. The method of claim 1 , further comprising:

detecting whether said mobile station is engaged in an active data session;

if said mobile station is engaged in an active data session, transmitting said incoming call notification to said mobile station as a packet protocol message; and

if said mobile station is not engaged in an active data session, transmitting said incoming call notification to said mobile station as a short message service (SMS) message.

18. The method of claim 17 , wherein said packet protocol message is a session initiation protocol (SIP) message.

19. The method of claim 1 , wherein transmitting an incoming call notification to said mobile station includes transmitting a short message service (SMS) message to said mobile station and transmitting a packet protocol message to said mobile station.

20. The method of claim 19 , wherein said packet protocol message is a session initiation protocol (SIP) message.