Alcatel

Societe Anonyme Dite: Alcatel Cit

Roger Larousse

Edouard Issenmann

Jean Charpentier

Patrick Lohat

In a GSM type system, home location register resets after some incidents are programmed from a back-up register. The invention proposes that mobile service switching centers create a difference between two classes of update requests which they send to the home location register in two different situations. In the first class a message following a change of area by a mobile station takes priority. In the second class a message follows a home location register reset and tends to (frequently unnecessarily) re-establish the conformity of the data in the home location register and in the visitor location registers of the centers. The second class is assigned a low priority level which prevents problems with the availability of the home location register. Application to telephony.

Mobile telephony method and system using signaling messages with priority levels

A data processing machine comprises a plurality of elementary machines (SUPMS, DEP, ARR, . . . ) disposed in a plurality of levels (level 1, level 2, . . .), and an event presentation device (PTA) responding to the arrival of an event by identifying the lowest machine level that is active and by identifying the elementary machine that is active in this lowest active machine level to present the event to said active elementary machine. An active elementary machine at any intermediate machine level comprises lower level activation means making it possible to respond to certain events by activating the next lower machine level and to activate a lower elementary machine in said lower machine level, and means for responding to certain other events that are not processed by said active elementary machine by sending them up to a higher level, thereby enabling an event to be transferred to an active higher elementary machine in the machine level immediately above the machine level to which said active elementary machine belongs. Said active elementary machine also includes deactivation means enabling it to respond to a particular event by deactivating itself and simultaneously deactivating any lower level elementary machine that it may previously have activated.

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Perros Guirec, France

Roger Larousse