METHOD FOR DETECTING RETRANSMISSION OF A FRAME

A method for detecting a resending of a frame, each frame sent that includes an identifier and a counter, the counter remaining identical during a resending, each frame sent being received by a plurality of gateways, each gateway retransmitting each frame to a central server, a response delay being predefined, the method comprising the steps of receiving a first frame comprising an identifier and a counter, storing as reference parameters a first reception time and the counter, receiving a second frame comprising the same identifier and another counter, and, if the values of the counters are equal then determining a second reception time of the second frame, and, if the difference between the reception times is greater than the response delay, then the second frame is a resending of the first frame, and updating the reference parameters with the second reception time.