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:
Oct. 06, 2020
Filed:
Oct. 24, 2018
Applicant:
Nec Corporation, Tokyo, JP;
Inventors:
Andreas Kunz, Heidelberg, DE;
Gottfried Punz, Heidelberg, DE;
Genadi Velev, Heidelberg, DE;
Toshiyuki Tamura, Heidelberg, DE;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04W 76/19 (2018.01); H04W 76/32 (2018.01); H04W 76/12 (2018.01); H04L 12/24 (2006.01); H04L 29/06 (2006.01); H04L 29/14 (2006.01);
U.S. Cl.
CPC ...
H04L 41/06 (2013.01); H04L 65/105 (2013.01); H04L 65/1006 (2013.01); H04L 65/1016 (2013.01); H04L 65/1073 (2013.01); H04L 69/40 (2013.01); H04W 76/19 (2018.02); H04W 76/12 (2018.02); H04W 76/32 (2018.02);
Abstract
A method of facilitating P-CSCF restoration when a P-CSCF failure has occurred is disclosed. The method comprises a Proxy Call Session Control Function, 'P-CSCF' receiving a Session Initiation Protocol, 'SIP', message when said P-CSCF has been selected as a alternative P-CSCF to a failed P-CSCF and providing to an associated Policy and Charging Rules Function, ‘PCRF’, a message comprising to indication that P-CSCF restoration is required.