MAPT: network address and port translation approach to IP multicast and its application to public wireless LANs

  • Authors:

  • Ryo Kitahara;Hidetoshi Ueno;Hideharu Suzuki;Norihiro Ishikawa;Takaaki Komura;Kenji Fujikawa;Haruo Takagi

  • Affiliations:

  • NTT DoCoMo, Inc., Yokosuka, Kanagawa, Japan;NTT DoCoMo, Inc., Yokosuka, Kanagawa, Japan;NTT DoCoMo, Inc., Yokosuka, Kanagawa, Japan;NTT DoCoMo, Inc., Yokosuka, Kanagawa, Japan;Kyoto University, Shimogyo-ku, Kyoto, Japan;Kyoto University, Shimogyo-ku, Kyoto, Japan;Sustainable Community Center Japan, Kamigyo-ku, Kyoto, Japan

  • Venue:
  • Proceedings of the 2006 international conference on Wireless communications and mobile computing
  • Year:
  • 2006

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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.