The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 2017
Filed:
Sep. 22, 2014
Ntt Docomo, Inc., Tokyo, JP;
Itsuma Tanaka, Tokyo, JP;
Masaki Machimoto, Tokyo, JP;
Kenta Oonishi, Tokyo, JP;
Zhen Miao, Tokyo, JP;
NTT DOCOMO, INC., Tokyo, JP;
Abstract
A P-CSCF () includes a terminating call processing unit () which receives SIP INVITE from an S-CSCF. The SIP INVITE includes an identifier of UE, and is relayed in response to acceptance of a terminating call to the UE. The P-CSCF () further includes: a restoration execution unit () which executes restoration of a subscriber profile linked with the UE based on reception of the SIP INVITE; and an address holding unit () which holds an address of a PCRF included in a response received from a DRA along with the execution of the restoration. The restoration execution unit reestablishes a session between the UE and the PCRF based on the held address of the PCRF, and causes the UE to execute re-registration with an IP multimedia subsystem.