Method for communication between a plurality of wheel units with one another and with a remote monitoring and/or control device

A system for communication between wheel units each associated with a wheel of a motor vehicle and between one of the wheel units, called a hub wheel unit, and at least one device for remotely monitoring and/or controlling the wheel units, each of the wheel units having at least means for measuring at least one pressure value of a tire mounted on a rim, forming the wheel respectively associated with the wheel unit and means for transmitting the at least one pressure value to the hub wheel unit, wherein said at least one remote monitoring and/or control device comprises:

• means for identifying each wheel unit by way of respective identification parameters and means for communicating, to each wheel unit, its identification parameters and identification parameters of others of the wheel units, each wheel unit comprising means for transmitting and receiving frames in accordance with a communication standard allowing a bidirectional data exchange,
• means for selecting one wheel unit from among the wheel units to be the hub wheel unit, the hub wheel unit storing the at least one pressure value measured and transmitted to the hub wheel unit by each of the wheel units, the other wheel units of the motor vehicle among the wheel units not selected as the hub wheel unit being peripheral wheel units,
• the hub wheel unit and the peripheral wheel units comprising scanning means for detecting transmitted frames, each wheel unit comprising means for storing data relating to the pressure of the tires of the vehicle and means for developing signaling frames intended for the hub wheel unit and/or for said at least one monitoring and/or control device, the system configured to:
• periodically send, by the hub wheel unit, at least one signaling frame in the direction of the peripheral wheel units, the signaling frame being received by a first peripheral wheel unit when a scanning function is activated in the first peripheral wheel unit, said first peripheral wheel unit sending a return signal to the hub wheel unit when the hub wheel unit requests it or when the first peripheral wheel unit has information to transmit to the hub wheel unit,
• perform communication between the wheel units and said at least one device for remotely monitoring and/or controlling the measured at least one pressure value of each of the wheels by:
• performing indirect communication between the wheel units and said at least one monitoring and/or control device via the hub wheel unit when it is detected that the motor vehicle is at a standstill, and
• performing direct communication between the wheel units and said at least one monitoring and/or control device when it is detected that the motor vehicle is moving.