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:
Aug. 15, 2023
Filed:
Nov. 01, 2021
Nec Corporation, Tokyo, JP;
Xiaowei Zhang, Tokyo, JP;
Anand Raghawa Prasad, Tokyo, JP;
Abstract
In order for supporting separate ciphering at an MeNB () and an SeNB (), the MeNB () derives separate first and second keys (KUPenc-M, KUPenc-S) from a third key (KeNB). The first key (KUPenc-M) is used for confidentially protecting first traffic transmitted over U-Plane between the MeNB () and a UE (). The first key (KUPenc-M) may be the same as current KUPenc or a new key. The second key (KUPenc-S) is used for confidentially protecting second traffic transmitted over the U-Plane between the UE () and the SeNB (). The MeNB () sends the second key (KUPenc-S) to the SeNB (). The UE () negotiates with the MeNB (), and derives the second key (KUPenc-S) based on a result of the negotiation.