Transmission method in a passive activation system for activating at least one function present in a motor vehicle

A group of an assembly for activating at least one functionality present in a motor vehicle and of at least one activation means carried by one or more persons authorized to perform this activation, the activation coming after a bidirectional transmission between said at least one activation means and a transmission system integrated into the activation assembly, the transmission system sending, receiving and measuring electromagnetic waves to and coming from said at least one portable activation means with a view to locating said at least one portable activation means, the transmission system comprising use-case modules of a respective functionality that send requests to locate said at least one portable activation means to a protocol driver of the system, comprising:

• inserting between each use-case module and the protocol driver, an intermediate management layer that:
• receives requests from use-case modules and stores them in a list present in a static matrix of optimization possibilities,
• classifies each request according to, on the one hand, a priority ranking and, on the other hand, an oldness of reception, priority criteria of the priority ranking being predetermined and stored beforehand in the matrix,
• selects a main request having the highest priority ranking and the greatest oldness, the highest priority ranking being preponderant over the greatest oldness,
• selects, from the requests remaining in the list, those that are compatible with the main request to be executed with the main request,
• sends at least one grouped signal corresponding to the main request and to the compatible requests to said at least one portable activation means via the protocol driver,
• the protocol driver receiving back from said at least one portable activation means at least one signal that is transmitted to the intermediate management layer and that allows said at least one portable activation means to be located after processing,
• the intermediate layer then sends to the use-case modules that respectively sent the main request or one of the compatible requests, the location of said at least one portable activation means, and
• deletes the main request and the compatible requests from the list present in the matrix,
• the system further comprising:
• an intermediate management layer for receiving and storing requests in a list present in a static matrix of optimization possibilities for ranking the requests in oldness and priority according to priority criteria stored in the matrix,
• selecting a main request and
• selecting requests from the list that are compatible with the main request,
• the protocol driver sending a signal grouped depending on the selected requests and means for receiving at least one signal back from said at least one portable activation means and transmitting said at least one signal to the intermediate management layer,
• the intermediate layer comprising processing said at least one signal with a view to locating said at least one portable activation means and means for sending the location to each of the use-case modules that sent a main request or a request compatible with the main request as well as means for updating the list of requests.