Abstract
IP Multicast has attracted a lot of attention as a cost-effective data delivery technique for music and video broadcasting services. Unfortunately, because most Internet Service Providers don't support IP multicast routing, end-to-end IP multicast is not well supported by the Internet. Therefore we propose a multicast routing method called MAPT (Multicast Address and a port Translation) which uses an address translation technique that converts IP addresses and UDP port numbers. We also propose a signaling method for MAPT which configures routing tables and port translation tables automatically. We discuss how to update the routing information flexibly to handle changes in the destination address and network topology. Furthermore, we implement prototype software of MAPT for the public wireless LAN service called MIAKO-NET, which is a commercial wireless LAN service provided in Japan. We then describe MIAKO-CAST which realizes multicast streaming delivery through MIAKO-NET and the Internet.
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