Mobile multimedia metropolitan area network

This paper proposes a mobile multimedia metropolitan area network (MM-MAN) which provides IP-based VPN connections between mobile terminals on business activities around metropolitan area, and LAN in their own home office. To make VPN circuit handed over on cell-by-cell traverse, a VPN agent exists in MM-MAN access networks, and VPN server in each office network. Tunneling between VPN server in LAN of home office, and VPN agent in the MM-MAN is used to support macro-mobility. To support high level business activities, all information which can reveal business activities should be hidden from the third party. To be neutral, private address is used as a source and destination in each VPN connection even to designate IP terminals in its own office, and is used even during the VPN setup to terminals in the Internet. Micro-mobility support for high-speed and high-bit rate terminals is a role of PON (passive optical network) as an access network. Multicast communication is used in a PON access network to construct logical macro-cell in order to allow smooth handover for high-speed terminal.