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:
Apr. 23, 2019
Filed:
Jan. 14, 2016
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
Paul Schliwa-Bertling, Ljungsbro, SE;
Karl Norrman, Stockholm, SE;
Alexander Pantus, Solna, SE;
Jari Vikberg, Järna, SE;
Oscar Zee, Stockholm, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A method of establishing a key related to at least two network instances is disclosed performed in a network node. The network instances are used in serving a communication device. The method comprises obtaining a first key relating to at least a first network instance; obtaining a second key relating to an additional network instance; determining, based on the first key and the second key, a joint key for use in protecting communication with the communication device on the at least first network instance and on the additional network instance. A method in a communication device, network node, communication device, computer programs and computer program products are also disclosed.