APPARATUS AND METHOD FOR MULTICAST GROUP JOIN MESSAGE SUPPRESSION OVER IEEE 802.16/WIBRO

摘要

A BS(Base Station) apparatus and a method for IP(Internet Protocol) multicast group join message flooding avoidance in a portable Internet network are provided to reflect a temporal gap using a delay timer in the portable Internet network having point-to-multipoint characteristics, thereby preventing excessive distribution of multicast group join messages. A BS(Base Station) apparatus for IP(Internet Protocol) multicast group join message flooding avoidance in a portable Internet network comprises the followings: a receiver(221) for receiving a join message for a group from a first subscribe station(200) which wants to join the IP(Internet Protocol) multicast group; and a transmitter(222) which transmits the received join message for the group to other subscribe station(210,250) which belonging to the BS, and transmits the received join message for the group to an access router(230) to which the BS belongs and other BSs(240) which belong to the access router when the join message for the group is not received from a second subscribe station during a set time after the receiver receives the join message for the group from the first subscribe station.