Patent ID: 7343159

Claim:
A wireless communication system including a plurality of terminals, comprising: a first terminal configured to send a signal including beacon information; and a second terminal configured to perform ranging to determine a distance with the first terminal in response to the signal, and to make a registration request to the first terminal when the determined distance is within a first predetermined range, wherein the first terminal is configured to perform ranging to determine a distance with the second terminal in response to the registration request, and to return an acknowledgement of the registration request to the second terminal when the determined distance is within a second predetermined range, the second terminal is configured to perform ranging to determine the distance with the first terminal in response to the acknowledgement, and to make an issuance request to issue a certificate of privilege to the first terminal when the determined distance is within a third predetermined range, and the first terminal is configured to perform ranging to determine the distance with the second terminal in response to the issuance request, and to issue a certificate of privilege to the second terminal when the determined distance is within a fourth predetermined range.