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:
Sep. 05, 2023
Filed:
May. 03, 2021
Nec Corporation, Tokyo, JP;
Xiaowei Zhang, Tokyo, JP;
Anand Raghawa Prasad, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
There is provided a network system including one or more first MMEs (), and a second MME () separated from the first MMEs (). In one of operation cases, the first MME () pushes, to the second MME (), security context for a UE () that attaches to the first MME (). The second MME () stores the security context. The first MME () further pushes the latest security context to the second MME (), during a switch-off procedure for the first MME (). The second MME () updates the stored security context with the latest security context. The first MME () pulls the security context from the second MME (), when the UE () re-attaches to the first MME () or is handovered from different one of the first MMEs ().