Method for the transmission of data among mobile bodies or autonomous vehicles
First Claim
1. A method for the transmission of data among mobile bodies or autonomous vehicles communicating with one another by radio link on a single radio channel with a limited range of transmission and a recurrence period, T, of transmission, comprising the steps of:
- constructing, in a transmitter/receiver of each of the mobile bodies or vehicles, information tables recording changes undergone by the radio channel by memorizing, during consecutive time intervals I of a determined duration dT that are smaller than the recurrence period T, of statuses of the radio channel, selected from a group of the statuses including "in collision", "busy" and "free";
setting fixed transmission instants in each of said transmitter/receivers, said fixed transmission instants being temporarily spaced out at intervals equal to the recurrence period T;
predicting the status of the channel for each of said fixed transmission instants as a function of the status of the channel memorized at an instant preceding said each of said fixed transmission instants with a temporal shift equal to the recurrence period T; and
deciding to transmit at one of said fixed transmission instants if the predicted status of the channel is not a status of collision or to transmit at an instant deferred with respect to said one of said fixed transmission instants if the predicted status of the channel is busy or free.
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Accused Products
Abstract
A method which constructs, in each transmitter/receiver of a mobile body or vehicle, information tables recording the changes undergone by a radio channel by memorizing, during consecutive time intervals of a determined duration dT that are smaller than the period of recurrence T, of the statuses of the radio channel, namely "in collision", "busy" or "free". The method then sets fixed transmission instants in each transmitter/receiver, these fixed transmission instants being temporally spaced out at intervals equal to the recurrence period T, to predict the status of the channel for each fixed transmission instant as a function of the status of the channel memorized at the instant preceding it with a temporal shift equal to the period T, and in deciding to transmit at this instant if the predicted status of the channel is not a status of collision or to transmit at an instant deferred with respect to the predicted instant if the opposite is the case.
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Citations
5 Claims
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1. A method for the transmission of data among mobile bodies or autonomous vehicles communicating with one another by radio link on a single radio channel with a limited range of transmission and a recurrence period, T, of transmission, comprising the steps of:
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constructing, in a transmitter/receiver of each of the mobile bodies or vehicles, information tables recording changes undergone by the radio channel by memorizing, during consecutive time intervals I of a determined duration dT that are smaller than the recurrence period T, of statuses of the radio channel, selected from a group of the statuses including "in collision", "busy" and "free"; setting fixed transmission instants in each of said transmitter/receivers, said fixed transmission instants being temporarily spaced out at intervals equal to the recurrence period T; predicting the status of the channel for each of said fixed transmission instants as a function of the status of the channel memorized at an instant preceding said each of said fixed transmission instants with a temporal shift equal to the recurrence period T; and deciding to transmit at one of said fixed transmission instants if the predicted status of the channel is not a status of collision or to transmit at an instant deferred with respect to said one of said fixed transmission instants if the predicted status of the channel is busy or free. - View Dependent Claims (2, 3, 4, 5)
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Specification