Handover method in portable internet using explicit multi-casting scheme

1. the art that the invention defined in the claims The present invention relates to a hand-over method will explicit multicasting scheme in a mobile Internet. 2. The invention attempts to solve the technical challenges The present invention provides a method for processing the handover, express the control process of the group management simple enemy multicasting technique by using a high-speed handover method low loss without a break in the mobile Internet environment having frequent mobility in a portable Internet that is its purpose. 3. Resolution of the subject matter of the invention, The present invention provides a handover method using the explicit multicasting scheme in the mobile Internet, CAR_ADD message transmitting step, the terminal for transmitting near the control station of the terminal generates a CAR_ADD message for registration / management explicitly multicasting group the current base station and the current control in the case to move to an overlapping area of ​​the new base station and the PreHO_ON message transmission phase, and a terminal for generating and transmitting a PreHO_ON message for that multicast packets are transmitted in a new control terminal current control terminal, and a new including the step of simultaneously receiving packets at the same time receiving a packet from the control station. 4. An important use of the invention, The invention yiyongdoem in portable Internet system. The handover explicit multicasting, Mobile IP