Method for adjusting a periodicity of communication between a wheel unit and an authorized device

A method for adjusting a periodicity of communication between a wheel unit and a remote monitoring and/or control device, a communication between said monitoring device and the wheel unit being carried out according to a communication protocol allowing a two-way short-range exchange of data using ultra-high-frequency radio waves, the wheel unit sending, with a predetermined first periodicity, basic signaling messages indicating its presence to any ultra-high-frequency wave communication device located in an environment of the wheel unit, the communication device i) being capable of intercepting a basic signaling message and ii) of sending a standard response message to the wheel unit,

• wherein the wheel unit having previously stored a group of communication devices authorized to serve as remote monitoring and/or control devices therefor:
• i) checks whether the communication device having sent a standard response message belongs to the group, and,
• ii) if this is the case, the wheel unit replaces the first periodicity with at least one shorter second periodicity resulting in a more intense two-way exchange for any signaling message subsequently sent from the wheel unit to the authorized device, and
• wherein, in addition to checking that a communication device belongs to the group of receiving devices that are authorized to serve as remote monitoring and/or control devices for the wheel unit in the capacity of authorized devices, one or more of the following checks are carried out, taken individually or in combination:
• sending, by the wheel unit exclusively to a communication device, a check signaling message using an identifier of the communication device modified by adding a confirmation key known to the wheel unit and to any authorized device, an authorized device being programmed to temporarily modify its identifier by adding the confirmation key thereto, and, when the communication device receives the check signaling message with the confirmation key and responds with a check response message, it is confirmed that the communication device is indeed an authorized device wishing to trigger the replacement of the first periodicity with at least one second periodicity,
• sending, by the wheel unit exclusively to a communication device, three successive signaling messages using an identifier of the communication device by the communication device in its response message to the wheel unit, the first message requesting a response, the second message containing a response interdiction and the third message requesting a response and, when the communication device responds to the first and third messages without responding to the second, it is confirmed that the communication device is indeed an authorized device wishing to trigger the replacement of the first periodicity with at least one second periodicity,
• sending, by the wheel unit exclusively to a communication device, at least two signaling messages using an identifier of the communication device, the first signaling message being transmitted via a first, default frequency channel and said at least second signaling message being transmitted via a second channel, the frequency of which is different from the frequency of the first channel, an authorized device being programmed to perform, on receiving the first signaling message, a permutation of reception from the first channel to the second channel, and, when the communication device has performed such a permutation and responded to said at least two signaling messages with a standard response message, it is confirmed that the communication device is indeed an authorized device wishing to trigger the replacement of the first periodicity with at least one second periodicity.