A multicast protocol for reducing disconnected time with changing route by mobile multicast gateway in mobile IP environment

In this paper, in order to avoid disconnection of a multicast path caused by the hand off of a mobile host (MH), we propose a multicast protocol in mobile Internet protocol (IP) environment. In the proposed protocol, when MH which receives multicast packets via mobile multicast gateway (MMG) from correspondent host (CH) hands off to other networks, MMG exchanges the multicast path to reduce disconnected time without increasing utilization of bandwidth. The simulation results show that the proposed protocol can reduce both utilization of bandwidth and disconnected time compared with the conventional protocols.