High-penetration transmission method for a...

H - Electricity – 04 – L

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H04L 5/22 (2006.01) H04B 7/185 (2006.01) H04L 1/08 (2006.01) H04Q 7/22 (2006.01)

Patent

CA 2241596

A method and system for increasing the signal margin of a radiocommunication link to provide a short message service which is reliable, even under non-ideal conditions. According to the method, short alphanumeric messages can be transmitted over the broadcast control channel of a digital radiocommunication link, or another communication channel consisting of one or more slots from successive frames in a TDMA communication link. An increase in transmission power is used in combination with repetition to increase effective signal margin without complications in the mobile unit design, significant delay, or co-channel interference. Where a more significant increase in signal margin is desired, when a longer message is required, or for voice messages, the message may be stored and the mobile unit alerted of the message.

Procédé et système pour augmenter la marge des signaux d'une liaison de radiocommunications et produire un service fiable de messages courts, même dans des conditions non idéales. Selon le procédé de l'invention, des messages alphanumériques courts peuvent être transmis sur la voie de commande de diffusion d'une liaison de radiocommunications numérique, ou une autre voie de communications consistant en un intervalle de temps ou plus de trames successives dans une liaison de communications AMRT. On utilise l'augmentation de la puissance de transmission combinée à la répétition pour augmenter la marge des signaux sans complications dans la conception du poste mobile, retard significatif ou brouillage dans une même voie. Lorsqu'une augmentation plus importante de la marge des signaux est souhaitable, lorsqu'un message plus long est requis, ou pour les messages vocaux, le message peut être mémorisé et le poste mobile averti du message.

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