METHOD AND APPARATUS FOR ALLOCATING MULTICAST CID AND TRANSPORTING IP MULTICAST PACKETS OVER IEEE 802.16/WIBRO NETWORKS

摘要

A method and an apparatus for allocating MCID(Multicast Connection IDs(Identifications)) for IP(Internet Protocol) multicast packet transmission and transmitting packets using the MCID in a portal Internet network are provided to transmit multicast packets having various scopes and multicast packets of a link local scope in an IEEE 802.16 network by assigning the MCIDs according to a scope of an IP multicast address, thereby removing the necessity of addition MCID assignment even when the number of multicast addresses used on the network is increased, and accordingly providing superior extensibility. A recording medium for recording a data structure of an MCID(Multicast Connection IDs(Identifications))(210) comprises the followings: a CS(Convergence Sublayer) descriptor value which represents a sublayer used for IP(Internet protocol) multicast packet transmission in a portable Internet network; and a scope value which represents a subnet category where the IP multicast packet is transmitted in the portable Internet network. A method for allocating the MCID for IP multicast packet transmission in various categories over the portable Internet network comprises: including the CS descriptor value as one or more bits in the MCID; and including the scope value as one or more bits in the MCID.