ONE-WAY COMMUNICATION ANTICOLLISION PROTOCOL

摘要

The invention refers to a one-way communications protocol via a common channel conflicting over the medium, in which there is no return channel for confirmation nor channel listening mechanism by the emitters, wherein N transmitters and M receivers share the channel. The transmitters send information frames at time intervals marked by a random variable. All receivers receive the message that is processed by the given receiver. When messages are lost, no detection or recovery mechanism whatsoever is available. The invention has the following applications: warns when the emitter passes near the receiver; automatic payment of highway tolls without having to stop; reception loss warning; ensuring that objects or persons do not go beyond a given distance pass the receiver; contactless labels; anti-theft alarms of merchandise and automatic billing in cash registers.