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:
May. 30, 2006
Filed:
Dec. 05, 2002
Alejandro R. Holcman, San Diego, CA (US);
Andrew T. Hunter, San Diego, CA (US);
Nikhil Jain, San Diego, CA (US);
Alejandro R. Holcman, San Diego, CA (US);
Andrew T. Hunter, San Diego, CA (US);
Nikhil Jain, San Diego, CA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
A method of using a ciphering key in a mobile station () from a first base station () in a first cellular communications system controlled by a first mobile switching control () station to a second base station in a second, different cellular system controlled by a second mobile switching control station is described. The method comprises generating for the mobile station a cipher key for use by the mobile station during communication in the second cellular communications system. The cipher key is generated by the mobile station from a private key assigned to the mobile station for the second cellular communications system and from a random number generated by the second cellular communications system. The cipher key is then communicated to the first mobile system and a private long code is generated for use by the mobile station during communication in the first cellular communications system.