MOBILE COMMUNICATION SYSTEM AND MOBILE STATION

摘要

PROBLEM TO BE SOLVED: To realize multi-cast packet transmission system with which the system efficiency can be enhanced in the case of applying multi-cast communication, in an IP packet communication network to mobile communication. SOLUTION: A multi-cast packet transmitted from an IP packet communication system is given to a support device. The support device specifies mobile stations to which this multi-cast packet is to be distributed (S5), and copies (S6) the received multi-cast packet to generate multi-cast packets of a number equivalent to the number of the specified distribution destination mobile stations. Then the support device distributes the copied multi-cast packets to the mobile stations in unit of frames on an access link. Thus, the packet transmission efficiency can be improved more, in comparison with copying the multi-cast packet from the IP packet communication system.