A method for discovering a network among a plurality of mobile nodes, which includes: a first mobile node periodically transmitting a first signal including an invitation token including data relating to an identity of the node which transmits the token; a second mobile node detecting the first signal; transmitting a second signal including at least one acknowledgement of the invitation token; creating a radio bubble, the communications between the nodes of the radio bubble being coordinated by transmitting a speech token between the nodes; and creating an IP sub-network between the nodes of the radio bubble, each node including an IP address.