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. 20, 1994
Filed:
Jun. 11, 1992
Matthias Pfundstein, Stuttgart, DE;
Standard Elektrik Lorenz Aktiengesellschaft, Stuttgardt, DE;
Abstract
A method of determining a temporary subscriber number (TMSI) in a subscriber data base is disclosed. Subscriber data bases with large subscriber-data fluctuations require special strategies to ensure optimum utilization of the available storage space while keeping access times as short as possible. In addition, subscriber anonymity is to be ensured. A method is provided for assigning a memory location to each subscriber via a temporary subscriber number (4-byte TMSI). The invention uses an internal structure for the TMSI which consists of several logically independent elements which, on the one hand, permit as large an addressing range as possible and, on the other hand, preclude any confusion of data records or any identification of the subscriber. In addition, the TMSI is constantly changed. With a 32-bit TMSI, up to 10.sup.6 subscribers can be unambiguously addressed.