| 摘要 |
A method for exchanging business cards between a plurality of users according to an embodiment of the present invention includes a step of requesting a business card exchange from a first terminal to a server; a step of allocating an ultrasonic frequency (f) from the server to the first terminal and generating a group business card exchanging room (R) in the server; a step of storing (f) and (R) mapping information in the server, registering user business card information of the first terminal in (R), and granting an access right to (R) to the first terminal; a step of extracting the frequency (f) after one or more second terminals receive a sound wave when the first terminal generates and transmits the (f) sound wave; a step of transmitting the frequency (f) received in the second terminal and user business card information of the second terminal to the server; and a step of registering Bx business card information in (R) mapped with (f) and granting the access right to (R) to the second terminal. [Reference numerals] (AA) Communication network |
