METHOD FOR DETECTING THE PLAYBACK OF A DATA PACKET

摘要

A method of detecting whether a packet from a plurality of packets transmitted by at least one transmitting station over a network has been played back is disclosed. Each packet includes a message and an identifier, the packets being successively transmitted over several consecutive time periods. The method includes receiving the packet by at least one receiving station and reading of the identifier of the received packet to obtain a received identifier, and consulting, by the receiving station, a database of identifiers already received to determine whether the received identifier has already been received. If the received identifier has not already been received, the method also includes updating the database to include the received identifier. The identifier includes an indicator of belonging to groups of packets.

主权项

1. A method of detecting whether a packet from a plurality of packets transmitted by at least one transmitting station over a network has been played back, each packet comprising a message and a packet identifier, the packets being successively transmitted over several consecutive time periods, the method including the following steps:
receiving the packet by at least one receiving station and reading the identifier of the received packet to obtain a received identifier; consulting, by the receiving station, a database of identifiers already received to determine whether the received identifier has already been received; and if the received identifier has not already been received, updating the database to include the received identifier, wherein:
the identifier includes an indicator of belonging to groups of packets,the database includes one or more sub-tables configured to store the identifiers of packets already having been received, each sub-table respectively being dedicated to one of the groups, andthe method further includes managing the database including conditional erasure of any one of the sub-tables if all of the packets of the group to which that sub-table is dedicated have been received.