Method and system for re-authentication in IP multimedia core network system (IMS)
View Patent ↗A method and system for authentication of a mobile device that includes a mobile device and a network element in a communications network. The network element may be a call state control function. If the network element detects an incorrect event related to a mobile device, the network element shortens a registration validity time for the mobile device and sends the mobile device a notification to re-authenticate. The incorrect event can be, for example, an incorrect authentication response, an incorrect action by the mobile device, a session over a time maximum, traffic generated being over a maximum, or credit run out. The mobile device is de-registered if the mobile device fails to re-authenticate within the shortened registration validity time, and re-registered if the mobile device re-authenticates within the shortened registration validity time. The registration validity time for the mobile device is extended after re-registration.
1. A method for re-authentication of a mobile device in a communications network comprising:
detecting an incorrect event at a network element on the network after authentication/registration of a mobile device, the incorrect event being related to an occurrence by the mobile device;
shortening a registration validity time for the mobile device in response to the occurrence by the mobile device; and
sending the mobile device a notification to re-authenticate, the shortened registration validity time setting a time limit for the re-authentication.
2. The method according to claim 1 , further comprising de-registering the mobile device if the mobile device fails to re-authenticate within the shortened registration validity time.
3. The method according to claim 1 , wherein the notification contains information indicating that the mobile device has to perform re-authentication in order to remain registered.
4. The method according to claim 1 , wherein the notification is a NOTIFY request according to a Session Initiation Protocol (SIP) protocol.
5. The method according to claim 1 , wherein the communications network is an IP Multimedia Network (IMN).
6. The method according to claim 1 , further comprising registering the mobile device if the mobile device re-authenticates within the shortened registration validity time.
7. The method according to claim 6 , further comprising extending the shortened registration validity time either back to an original or to a new registration validity time if the mobile device re-authenticates within the shortened registration validity time.
8. The method according to claim 1 , wherein the network element comprises a call state control function.
9. The method according to claim 8 , wherein the network element comprises a serving call state control function (S-CSCF).
10. The method according to claim 1 , wherein the incorrect event comprises an incorrect authentication response.
11. The method according to claim 10 , wherein the incorrect authentication response comprises an incorrect RES value.
12. The method according to claim 1 , wherein the incorrect event comprises an incorrect action by the mobile device.
13. The method according to claim 1 , wherein the incorrect event comprises a session over a time maximum.
14. The method according to claim 1 , wherein the incorrect event comprises traffic generated being over a maximum.
15. The method according to claim 1 , wherein the incorrect event comprises credit run out.
16. The method according to claim 1 , wherein the mobile device comprises one of a mobile phone and a Personal Digital Assistant (PDA).
17. A network element in a communications network, the network element performing a re-authentication process comprising:
detecting an incorrect event at the network element after authentication/registration of a mobile device, the incorrect event being related to an occurrence by the mobile device;
shortening a registration validity time for the mobile device in response to the occurrence by the mobile device; and
sending the mobile device a notification to re-authenticate, the shortened registration validity time setting a time limit for the re-authentication.
18. The network element according to claim 17 , the authentication process further comprising de-registering the mobile device if the mobile device fails to re-authenticate within the shortened registration validity time.
19. The network element according to claim 17 , wherein the notification contains information indicating that the mobile device has to perform re-authentication in order to remain registered.
20. The network element according to claim 17 , wherein the notification is a NOTIFY request according to a Session Initiation Protocol (SIP) protocol.
21. The network element according to claim 17 , wherein the communications network is an IP Multimedia Network (IMN).
22. The network element according to claim 17 , the authentication process further comprising registering the mobile device if the mobile device re-authenticates within the shortened registration validity time.
23. The network element according to claim 22 , the authentication process further comprising extending the shortened registration validity time either back to an original or to a new registration validity time if the mobile device re-authenticates within the shortened registration validity time.
24. The network element according to claim 17 , wherein the network element comprises a call state control function.
25. The network element according to claim 24 , wherein the network element comprises a serving call state control function (S-CSCF).
26. The network element according to claim 17 , wherein the incorrect event comprises an incorrect authentication response.
27. The network element according to claim 26 , wherein the incorrect authentication response comprises an incorrect RES value.
28. The network element according to claim 17 , wherein the incorrect event comprises an incorrect action by the mobile device.
29. The network element according to claim 17 , wherein the incorrect event comprises a session over a time maximum.
30. The network element according to claim 17 , wherein the incorrect event comprises traffic generated being over a maximum.
31. The network element according to claim 17 , wherein the incorrect event comprises credit run out.
32. The network element according to claim 17 , wherein the mobile device comprises one of a mobile phone and a Personal Digital Assistant (PDA).
33. A mobile device in a communications network, the mobile device performing a re-authentication process comprising:
receiving a notification to re-authenticate from a network element on the network after authentication/registration of the mobile device, the notification being in response to detection by the network element of an occurrence by the mobile device; and
re-authenticating with the network element within a shortened registration validity time set by the network element.
34. The mobile device according to claim 33 , wherein the notification contains information indicating that the mobile device has to perform re-authentication in order to remain registered.
35. The mobile device according to claim 33 , wherein the notification is a NOTIFY request according to a Session Initiation Protocol (SIP) protocol.
36. The mobile device according to claim 33 , wherein the communications network is an IP Multimedia Network (IMN).
37. The mobile device according to claim 33 , wherein the network element comprises a call state control function.
38. The mobile device according to claim 37 , wherein the network element comprises a serving call state control function (S-CSCF).
39. The mobile device according to claim 33 , wherein the mobile device comprises one of a mobile phone and a Personal Digital Assistant (PDA).
40. A system for re-authentication of a mobile device comprising:
at least one mobile device, the at least one mobile device operatively connected to a communications network;
a network element, the network element operatively connected to the communications network, the network element: detecting an incorrect event after authentication/registration of a mobile device related to an occurrence by the mobile device, shortening a registration validity time for the mobile device in response to the occurrence by the mobile device, and sending the mobile device a notification to re-authenticate, the shortened registration validity time setting a time limit for the re-authentication.
41. The system according to claim 40 , the network element de-registering the mobile device if the mobile device fails to re-authenticate within the shortened registration validity time.
42. The system according to claim 40 , wherein the notification contains information indicating that the mobile device has to perform re-authentication in order to remain registered.
43. The system according to claim 42 , wherein the notification is a NOTIFY request according to a Session Initiation Protocol (SIP) protocol.
44. The system according to claim 40 , wherein the communications network is an IP Multimedia Network (IMN).
45. The system according to claim 40 , the network element registering the mobile device if the mobile device re-authenticates within the shortened registration validity time.
46. A system according to claim 45 , the network element extending the shortened registration validity time either back to an original or to a new registration validity time if the mobile device re-authenticates within the shortened registration validity time.
47. The system according to claim 40 , wherein the network element comprises a call state control function.
48. The system according to claim 47 , wherein the network element comprises a serving call state control function (S-CSCF).
49. The system according to claim 40 , wherein the incorrect event comprises an incorrect authentication response.
50. The system according to claim 49 , wherein the incorrect authentication response comprises an incorrect RES value.
51. The system according to claim 40 , wherein the incorrect event comprises an incorrect action by the mobile device.
52. The system according to claim 40 , wherein the incorrect event comprises a session over a time maximum.
53. The system according to claim 40 , wherein the incorrect event comprises traffic generated being over a maximum.
54. The system according to claim 40 , wherein the incorrect event comprises credit run out.
55. The system according to claim 40 , wherein the mobile device comprises one of a mobile phone and a Personal Digital Assistant (PDA).