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:
Jun. 02, 2026
Filed:
Feb. 03, 2022
Nec Corporation, Tokyo, JP;
Kundan Tiwari, Tokyo, JP;
Toshiyuki Tamura, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
Disclosed are techniques for registering a user equipment (UE) to a new access and mobility management function (AMF). When a new access and mobility management function (AMF) determines that an old AMF is disjoint AMF i.e. they are not connected, then the new AMF fetches the UE context (5GMM and 5GSM context) from the old AMF via new generation radio access network (NG-RAN). The new AMF routes a Namf_Communication_UEContextTransfer request message to the old AMF to fetch the UE contexts via NG-RAN. The old AMF sends the UE contexts in the Namf_Communication_UEContextTransfer response message to the new AMF via NG-RAN. Based on the context transfers between the new AMF and the old AMF, the UE is registered to the new AMF.