Delegation of management of acknowledgements and of transmission of frames

A gathering gateway, referred to as elected gathering gateway, in the context of a management of acknowledgements and downlink transmissions in a communication system comprising a server, at least one end device and at least one gathering gateway serving as a relay between the server and said at least one end device, each end device communicating with at least one said gathering gateway via a wireless communication medium, each end device transmitting, to the server, uplink frames having moments of transmission according to which reception windows are defined, intended for downlink frames supposed to be constructed by the server and relayed on the wireless communication medium via one said gathering gateway selected by the server, wherein said elected gathering gateway implements, in collaboration with the server, a disengageable delegation mechanism vis-à-vis at least one elected end device, wherein said elected gathering gateway comprises electronics circuitry configured for:

• allocating a buffer, in the elected gathering gateway, to each elected end device and storing therein useful data received asynchronously from the server for the attention of said elected end device;
• and
• acknowledging the uplink frames received from each elected end device by constructing and transmitting, in said reception windows defined according to the moments of transmission of said uplink frames, by the elected gathering gateway, on behalf of the server, downlink frames including respective acknowledgements of said uplink frames and including, if any, useful data stored in the buffer allocated to said end device.