Method and arrangement for effective radio transmission of data

Details Method and arrangement for effective radio transmission of data Method and arrangement for effective radio transmission of data

H - Electricity

04

B

H04B 7/204 (2006.01) H04B 7/26 (2006.01) H04J 4/00 (2006.01) H04L 27/18 (2006.01) H04Q 11/00 (2006.01) H04Q 7/36 (2006.01)

Patent

CA 2294915

Method and arrangement for effective radio transmission of data According to the invention, a method and an arrangement are provided for digital radio transmission of data between a fixed station (1) and at least one mobile station (2, 3) at one of a plurality of carrier frequencies (F1, F2 ...), the data being transmitted in a plurality of time slots (Z1, Z2 ...) using a time- division multiplex method. The change from one carrier frequency to another carrier frequency requires a prede- termined time period when so-called slow hopping RF modules are used. The data are transmitted in active time slots, which are each followed by an inactive time slot in which no data are transmitted and which is sufficient for the RF modules to programme the frequency for the next active time slot. According to the invention, the time duration of the inactive time slot is shorter than that of an active time slot.

L'invention concerne un procédé et un dispositif pour la radiotransmission numérique de données entre une station fixe (1) et au moins une station mobile (2, 3) sur une fréquence porteuse parmi une pluralité de fréquences porteuses (F1, F2...). Selon l'invention, les données sont transmises dans plusieurs créneaux temporels (Z1, Z2...) selon un procédé de multiplexage temporel. Le passage d'une fréquence porteuse à une autre fréquence porteuse nécessite, en cas d'utilisation de modules HF à sauts lents, un temps prédéterminé. Les données sont transmises dans des créneaux temporels actifs qui sont chacun suivis par un créneau temporel inactif dans lequel aucune donnée n'est transmise et qui suffit aux modules HF pour programmer la fréquence du créneau temporel actif suivant. Selon l'invention, le créneau temporel inactif est plus bref qu'un créneau temporel actif.

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