Method of communicating between different electronic entities

1. 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.

2. The method according to claim 1 , wherein said electronic entities constitute a network of acquaintances.

3. The method according to claim 2 , wherein, upon said list including a new electronic entity, the method further comprising a step of adding the new electronic entity to said network of acquaintances as a function of at least one predetermined criterion.

4. The method according to claim 1 , wherein each of said electronic entities is associated with a unique identifier.

5. The method according to claim 4 , wherein each identifier is associated with a service or family code.

6. The method according to claim 1 , wherein at least one of said electronic entities is secure.

7. The method according to claim 1 , wherein at least one of said electronic entities is a loyalty card.

8. The method according to claim 1 , wherein at least one of said electronic entities is a payment card.

9. The method according to claim 1 , wherein the method ensures continuity of communication involving one of said electronic entities and an antenna from a plurality of antennas connected to the communication management means when said electronic entity moves in such a manner that said communication involves another antenna from said plurality of antennas.

10. The method according to claim 1 , wherein said list of said electronic entities includes a list of all of said electronic entities separate from a list of said electronic entities in communication with other said electronic entities.

11. The method according to claim 1 , wherein one of the electronic entities is a proximity card with a 10 cm range and that complies with ISO/IEC standard 14443, and an other one of the electronic entities is a vicinity card with a 70 cm range and that complies with ISO/IEC standard 15693.

12. The method according to claim 1 , wherein at least one of said electronic entities is a contactless microcircuit card.

13. The method according to claim 1 ,

wherein said electronic entities include said other of the electronic entities and a sender entity, and

wherein said message is sent from the sender entity.

14. The method according to claim 1 , further comprising:

upon contacting said other of the electronic entities intended to receive the message, sending the message to said other of the electronic entities.

15. A communication system, comprising:

at least two electronic entities having contactless communication; and

further comprising:

employing a command-response protocol to communicate with said electronic entities using said contactless communication upon said electronic entities being within a radius of action of said communication management unit, said communication management unit having stored therein a list of said electronic entities that are within the radius of action of a communication management unit,

wherein at least one of said electronic entities communicates with said communication management unit using said contactless communication,

wherein said communication management unit is configured to, for each electronic entity of said list,

send an interrogation message 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, the communication management unit stores 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, the communication management unit removes the electronic entity from said list of electronic entities,

and when said list includes a new electronic entity that is configured to exchange messages with at least one of the electronic entities, creating a new mailbox, said new mailbox configured to receive and store messages sent to or by said new electronic entity.

16. The communication system according to claim 15 , wherein one of the electronic entities is a proximity card with a 10 cm range and that complies with ISO/IEC standard 14443, and an other one of the electronic entities is a vicinity card with a 70 cm range and that complies with ISO/IEC standard 15693.

17. The communication system according to claim 15 , wherein said communication management unit further includes means for sending the message to said addressee entity upon a determination that said addressee entity can be contacted.