Method for embodying walkie-talkie using mobile communication terminal

A method for embodying a walkie-talkie using a mobile terminal is provided to enable all the other sub terminals within a network to receive and listen to a voice message transmitted to an ACL(Asynchronous ConnectionLess) link from a sub terminal by allowing the sub terminal to transmit the voice message to the ACL link and a gateway to receive/broadcast it through an ASB(Active Slave Broadcast) method. If a user of the first sub terminal, forming a network with a plurality of other sub terminals through a gateway, pushes a voice message key(S200,S202), the first sub terminal creates a token request signal and sends it to the gateway(S204). The gateway judges whether token acceptance to the token request signal is possible(S206). In case token acceptance is possible, the gateway creates a token acceptance signal and transmits it to the first sub terminal(S206). The first sub terminal receives the token acceptance signal and informs the user of it(S208). As the user inputs a voice message, the first sub terminal transmits the inputted voice message to the gateway through an ACL link(S210,S212). The gateway, receiving the voice message transferred through the ACL link, broadcasts it to the other sub terminals through an ASB method(S214).