Ims reregistration method and system therefor
AssigneeSamsung Electronics Co., Ltd.
InventorsHan-Na Lim, Tae-Sun Yeoum, Eun-Hui Bae, O-Sok Song, Sung-Ho Choi
Life of this patent
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Abstract
A method and system in which upon occurrence of a P-CSCF failure, a network sends an IMS reregistration request message to a UE. An S-CSCF or an AS monitors a P-CSCF to detect occurrence of a failure in the P-CSCF. Upon detecting the occurrence of a P-CSCF failure, the S-CSCF or the AS sends a request message for IMS reregistration to the UEs being served by the failed P-CSCF. In this manner, the UE can continuously receive the service even though a failure occurs in the P-CSCF.
Claims19
A method for performing Internet Protocol (IP) Multimedia Subsystem (IMS) reregistration of a User Equipment (UE), the method comprising:
- assigning one of a plurality of Proxy-Call Session Control Functions (P-CSCFs) to a UE that has requested IMS registration;
- monitoring occurrence of a failure in the multiple P-CSCFs;
- and
- upon detecting occurrence of a failure from at least one of the multiple P-CSCFs as a result of the monitoring, notifying at least one of UEs being served by the failed P-CSCF to perform IMS reregistration.
A method for performing Internet Protocol (IP) Multimedia Subsystem (IMS) reregistration by a User Equipment (UE), the method comprising:
- receiving assignment of one of a plurality of Proxy-Call Session Control Functions (P-CSCFs) through IMS registration;
- when a failure occurs in the assigned P-CSCF, receiving an IMS reregistration request message from an Application Server (AS);
- and
- sending a request for IMS reregistration to a Serving-Call Session Control Function (S-CSCF), to be assigned a new P-CSCF.
A system for supporting Internet Protocol (IP) Multimedia Subsystem (IMS) reregistration of a User Equipment (UE), the system comprising:
- a Serving-Call Session Control Function (S-CSCF) for monitoring a Proxy-Call Session Control Function (P-CSCF) that serves the UE, to detect occurrence of a failure of the P-CSCF;
- and
- an Application Server (AS) for receiving, from the S-CSCF, a failure occurrence notification message of the P-CSCF and information on UEs being served by the failed P-CSCF, and sending an IMS reregistration request message to the UEs.
A system for supporting Internet Protocol (IP) Multimedia Subsystem (IMS) reregistration of a User Equipment (UE), the system comprising:
- a Proxy-Call Session Control Function (P-CSCF) for serving a UE that has performed 3rd party registration;
- and
- an Application Server (AS) for, upon detecting occurrence of a failure of the P-CSCF, sending an IMS reregistration request message to UEs being served by the failed P-CSCF.
Dependencies are inferred from the claim text.