Thales

Bruno Deltour

Yves Singlas

Thibault De Moegen

Jean-Baptiste Chantelouve

A method is provided for transmitting data between a plurality of radio stations of one same network, each station having a transmitter and a receiver. The method includes a first transmission mode in which the network operates with frequency hopping in a first frequency plan, the frequency used for data transmission being maintained for a FH dwell time, and changing from one FH dwell time to another as per a law of frequency change; a second transmission mode in a second frequency plan in which a transmitter station (A) transmits data on a fixed frequency to a receiver station (B), the second mode comprising a step () to determine the fixed frequency, the determination step comprising the transmission of a test word on each frequency of the second plan for a respective test dwell time. The duration of the test dwell time is equal to the duration of the FH dwell time multiplied by an integer factor of value between 1 and 6.

Method and network for data transmission between a plurality of radio stations

The invention relates to a method for determining a set of frequencies that can be used in a frequency plane for transmitting information between transceivers of a network operating with frequency hopping. One inventive aspect includes determining an initial set of frequencies that can be used, whose variations having a magnitude lower than a threshold, monitoring first and second portions of the frequency plane, the first portion comprising the set of frequencies that can be used, the second portion comprising frequencies that do not belong to that set of frequencies, and subsequently determining a new set of frequencies that can be used. The determination associated with the first portion has a first threshold, and the determination associated with the second portion has a second threshold which is separate from the first.

Method and device for determining a set of frequencies that can be used for transmitting information between radio transceivers of a network operating with frequency hopping

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Gennevilliers, France

Bruno Deltour