Schneider Electric Industries Sas

Nicolas Cochard

Olivier Coutelou

Emmanuel Dreina

Gilles Thonet

Michel Hennequin

A method of radio communication in a system including a plurality of communicating modules, each communicating module being able to obtain at least one measured physical value and to transmit a message encapsulating at least one measured physical value to a hub device according to a given radio communication protocol, the sending of the message being performed during a communication time interval, defined by a start instant and an end instant, a waiting time separating two successive communication time intervals of one and the same communicating module. For each communicating module of the plurality of communicating modules, the waiting time is calculated as a function of an updated counter of the communicating module as a function of a receipt of an acknowledgement message originating from the hub device.

Method of radio communication in a system comprising a plurality of communicating modules

The gateway communication device for wireless communication networks receives messages from a low-power transmitter and communicates with a network. In a system comprising several gateway devices for a low-power transmitter, a master gateway device is defined. Definition of a master gateway device is based on reception quality indicators of the gateway devices situated in said reception zone of messages transmitted by said low-power transmitter. The gateway device having the highest reception quality indicator is selected to be said master gateway device. The communication method also defines a master gateway device in the same way. The master gateway device then selects a backup gateway device to store link tables and in certain cases to act in the place of the master.

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Le Versoud, France

Nicolas Cochard