Method of communicating between different electronic entities

A method of communicating between at least two electronic entities having contactless communication means, said method comprising:

• using a communication management unit to control at least part of a process of communication between said electronic entities, said communication management unit (LPU) employing a command-response protocol using said contactless communication means to communicate with said electronic entities upon said electronic entities being within a radius of action of said communication management unit;
• storing in said communication management unit a list of said electronic entities that are within the radius of action of said communication management unit;
• and
• querying each of the electronic entities to determine if any of the electronic entities has a message to be sent to an other of said electronic entities;
• and
• for each electronic entity of said list,
• sending an interrogation message from said communication management unit to the electronic entity, in order to determine if the electronic entity has a message to be sent to another of said electronic entities,
• a determination being positive upon receiving, in response to the interrogation message, said message to be sent to said other electronic entity, otherwise said determination being negative,
• where, in the case of a positive determination, storing a received message in a mailbox of said communication management unit that is assigned to said electronic entity or to said other electronic entity, and
• where in the case of a negative determination, if no acknowledgment from the electronic entity is received in response to the interrogation message thereby showing that the electronic entity is no longer within said radius of action, removing the electronic entity from said list of electronic entities,
• wherein, when said list includes a new electronic entity, a mailbox is created in the communication management unit, said mailbox being adapted to receive and store messages sent to or by said new electronic entity.