Improved satellite trunked radio service system

Details Improved satellite trunked radio service system Improved satellite trunked radio service system

H - Electricity

04

B

H04B 7/185 (2006.01) H04L 9/32 (2006.01) H04H 1/00 (2006.01) H04Q 7/20 (2006.01)

Patent

CA 2238646

A mobile communication system for providing communication between multiple users (10) in a closed user group arrangement includes a plurality of mobile earth terminals METs (10) registering with a mobile communication system (12). The first mobile earth terminal (10) selects a closed user group network identifier (NET ID) representing a NET group to establish voice communication therewith and transmits the NET ID to a central controller (14). The central controller (14) receives the NET ID from the first MET (10), validates the NET ID, allocates a frequency for the NET group, and broadcasts the message to the NET group informing the NET group of the allocated frequency. The second MET (10) tunes to the frequency in response to the message broadcast by the central controller (14). The closed user group arrangement provides security measures to ensure only authorized METs to gain access to the NET group, dual standby mode of operation, and priority default operation.

Un système de communication mobile assurant la communication entre des utilisateurs multiples (10) dans une configuration de groupe fermé d'utilisateurs, comprend une pluralité de terminaux terrestres mobiles (TTM) (10) rattachés à un système satellitaire mobile (12). Le premier terminal terrestre mobile (10) sélectionne un identificateur de réseau (ID RESEAU) de groupe fermé d'utilisateurs, représentant un groupe RESEAU pour établir la communication vocale avec ce dernier et envoyer l'ID RESEAU à un dispositif de commande central (14). Ce dernier (14) reçoit l'ID RESEAU d'un premier TTM (10), valide l'ID RESEAU, attribue une fréquence au groupe reseau et diffuse le message à l'attention du groupe réseau l'informant de la fréquence attribuée. Le deuxième TTM (10) se règle sur la fréquence en réponse au message diffusé par le dispositif de commande central (14).

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