Seamless multicast handover in an NC-HMIPv6 environment
WSEAS Transactions on Computers
Adaptive range-based mobile multicast
Proceedings of the 1st ACM workshop on Mobile internet through cellular networks
Distributed dynamic mobile multicast
Journal of Parallel and Distributed Computing
Dynamic region-based mobile multicast
Wireless Communications & Mobile Computing
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The issue for mobile multicast is classified as twotrends. The one is route optimization and the other is howfast the multicast routing tree can be reconstructed. Incase of reconstructing the multicast tree, the FA must jointhe multicast group whenever the attachment point ischanged. This mechanism has the advantage of routeoptimization for transmitting multicast data. But the treereconstruction may be occurred whenever the mobile hostmoves. Its overhead may be increased rapidly. In order toservice multicast, the other way is the use of tunnelingwithout tree reconstruction. Because the HA (HomeAgent) already is being subscribed the multicast session,the multicast datagram is transmitted to HA. The HAtunnels it to the current FA (Foreign Agent), whichmobile host is attached. When this mechanism is applied,the tree reconstruction is not needed. However, the pathfrom the HA to FA may not be optimized. The longer thepath distance is, the more packet delay may be increase.If the FA does not support IGMP, the more seriousproblem is caused. As stated above, the two mechanismsmay not be implemented easily on the current network. Inthis paper, we propose the mobile multicast mechanismbased on SSM (Source-Specific Multicast), which isproposed in order to support one-to-many transmissionefficiently. But, automatic tunneling is used instead of thesource-based tree. The key feature of this mechanism is toremove the overload caused by tree reconstruction and tooptimize the multicast path simultaneously when thehandoff is occurred.