Telecommunications – Transmitter and receiver at separate stations
Patent
1992-06-11
1994-12-20
Kunte, Curtis
Telecommunications
Transmitter and receiver at separate stations
455 531, 455 541, 379 59, H04B 726
Patent
active
053752511
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.
REFERENCES:
patent: 5123111 (1992-06-01), Delory et al.
patent: 5239294 (1993-08-01), Flanders et al.
Telephone Engineer and Management Bd. 95, Nr. 2, 15. Jan. 1991, US Seiten 50 -54 "Security and Saturation Solutions for GSM" by Delory et al.
Kunte Curtis
Pham Chi
Standard Elektrik Lorenz Aktiengesellschaft
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