Method for transmitting a radio signal between an electronic unit of a vehicle wheel and an electronic centralized control unit attached to the vehicle

A method for transmitting a radio signal between a moving electronics unit (5) of a wheel (1) of a vehicle and a fixed central electronic control unit of said vehicle, comprising the following steps:

• detecting from the wheel electronics unit, during a rotation of the wheel, information defining a given angular position of said wheel at a given instant, and defining an angular reference point (Rref) of the wheel based on said information, which is fixed relative to the wheel and corresponds to said given angular position,
• then establishing a transmission of said radio signal between the wheel electronics unit (5) and the central electronic control unit, in such a way that said signal is transmitted at a predetermined angular position of the wheel, calculated on the basis of said angular reference point (Rref),
• transmitting a plurality of successive radio signals between the wheel electronics unit of a vehicle and the central electronic control unit, wherein each signal of said plurality of successive signals is transmitted at a different predetermined angular position of the wheel, calculated on the basis of an angular reference point which is fixed relative to the wheel,
• additionally defining a division of one revolution of the wheel into successive basic sectors (S1-S8) using an angular reference point (Rref), the step of establishing transmission of a plurality of successive radio signals between the wheel electronics unit and the central electronic control unit being carried out in such a way that each said signal of said plurality of signals is transmitted at a predetermined angular position of the wheel, calculated on the basis of an angular reference point and on the basis of said division of the wheel into sectors,
• wherein the method further comprises the following steps:
• the time elapsed between the position of the electronics unit (5) of the wheel (1) at an angular reference point (Rref) of the wheel, and an identical position of the wheel electronics unit (5) in the next revolution of the wheel, is measured for the purpose of calculating an angular rotation speed of the wheel,
• a minimum wheel rotation sector required for a transmission time of a signal between the wheel electronics unit and the central electronic control unit is determined, at the calculated angular rotation speed of the wheel,
• and an angular offset of transmission between a first signal and a second signal following the first signal is determined, with respect to the angular reference point (Rref), as being equal to the smallest multiple of the basic division sector (S1-S8) which covers the time required for transmission of said first radio signal at the calculated angular rotation speed.