Wireless base station, method of selecting wireless base station, method of multicasting, and wireless terminal

A wireless base station which is connected to a control station and a plurality of wireless terminals and provides a multicasting service for the plurality of wireless terminals, characterized in comprising:

• a transmitting means for transmitting a first state signal to the control station, the first state signal indicating a multicasting service state of the wireless base station;
• and
• a receiving means for receiving a second state signal from the control station, the second state signal indicating a multicasting service state of a neighboring wireless base station.

A wireless base station which is connected to a control station and a plurality of wireless terminals and provides a multicasting service for the plurality of wireless terminals, characterized in that the wireless base station determines whether the wireless base station provides the multicasting service, based on instructions received from the control station.

A method of selecting a wireless base station for a wireless terminal, the wireless base station providing a multicasting service for the wireless terminal, characterized in that, when the wireless terminal can receive same multicasting information from a plurality of wireless base stations, the wireless terminal selects one of the plurality of wireless base stations so as to make the number of the wireless base stations that send the same multicasting information as small as possible.

A wireless base station which provides a multicasting service for a wireless terminal, characterized in that, when the wireless terminal selects one of a plurality of wireless base stations so as to make the number of the wireless base stations that send identical multicasting information as small as possible, the wireless base station determines that the wireless base station provides a multicasting service for the wireless terminal.

A wireless base station which provides a multicasting service for a wireless terminal, characterized in comprising a counter in which a count value is incremented when a join message from the wireless terminal is received at the wireless base station, and decremented when a leave message from the wireless terminal is received at the wireless base station, wherein the wireless base station transmits the count value of the counter to the wireless terminal.