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:
Mar. 05, 2024
Filed:
Mar. 30, 2022
T-mobile Usa, Inc., Bellevue, WA (US);
Lin Zhang, Overland Park, KS (US);
T-Mobile USA, Inc., Bellevue, WA (US);
Abstract
Disclosed herein are techniques, devices, and systems for a mobile device to keep track of public land mobile networks (PLMNs) codes from a list(s) of equivalent PLMNs that the mobile device received at a time of performing a past registration procedure(s). For example, memory of the mobile device may store a PLMN code(s) from a list of equivalent PLMNs that the mobile device received from a mobility management entity (MME) or an access and mobility function (AMF) node. During a subsequent registration, the mobile device may send a message to another MME or another AMF node, and may receive a message, such as an ATTACH ACCEPT message or a REGISTRATION ACCEPT message, from the other MME or the other AMF node. In response to receiving the message, the mobile device can maintain the stored PLMN code(s) in the memory.