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:
Dec. 27, 2005
Filed:
Nov. 22, 2000
Applicants:
Christoph Hermann, Aachen, DE;
Josef Wasel, Bedburg, DE;
Inventors:
Christoph Hermann, Aachen, DE;
Josef Wasel, Bedburg, DE;
Assignee:
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M003/16 ;
U.S. Cl.
CPC ...
Abstract
A wireless network employing a radio network controller and a plurality of assigned terminals which are provided for coding certain data to be transmitted over traffic and control channels and which are provided for changing the respective key necessary for the coding at certain instants. The radio network controller sends a message about a change of the key coded with an old cipher key to a terminal The terminal responds with a message coded with a new cipher key as an acknowledgement for the new cipher key.