Abstract: Each radio terminal monitors generation of address conflict between terminals including the terminal of interest by referring to epoch numbers and addresses of other terminals registered in a history table and an address table in a data memory of a radio LAN adapter of the terminal of interest during data communication of a host computer. When conflict is generated, the terminal of interest resolves the conflict by requesting the communicating terminal to update the address and receiving the updated address. Communication protocol and software for address allocation are stored in a program memory and carried out by a microcontroller. Communication with other terminals is carried out through an antenna, a radio transceiver, and a radio interface.