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Explicit Multicast for Small Group Communications in Heterogeneous Mobile Networks  

Kim Wan-Tae (Mobile Internet Platform Team, Embedded Software Research Division, ETRI)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.43, no.8, 2006 , pp. 15-24 More about this Journal
Abstract
We design and implement explicit mobile multicast, named XMIP, by enhancing explicit multicast for a great number of small group multicast communications. XMIP is a straightforward multicast mechanism without maintaining multicast states due to the inheritance from the explicit multicast based on a unicast routing. This research modifies and extends the functionality of each mobility agent of IETF Mobile IP for interworking XMIP XMIP Packets captured by an extended home agent are forwarded to each extended foreign agent through nested tunnels, named X-in-X tunnels, made by the binding table of the extended home agent. X-in-X tunneling mechanism can effectively solve the serious traffic concentration problems of Mobile IP multicast specifications. Finally heterogeneous mobile networks as an XMIP testbed including CDMA2000 1X EV-DO and WLAN are actually established, and a multi-user instant messenger system for small group communications is developed for verifying the feasibility of the proposed protocols.
Keywords
mobile; explicit multicast; QoS; small group communications;
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