METHOD AND SYSTEM FOR PERFORMING HAND OVER FROM PORTABLE INTERNET NETWORK TO MOBILE COMMUNICATION NETWORK FOR VIDEO TELEPHONY SERVICE

摘要

The present invention relates to a method and system for handover from a portable Internet network to a mobile communication network in a video telephony service.;The present invention provides a method comprising the steps of: (a) a MM-MB terminal performing a video call with a counterpart terminal in a first service area; (b) the MM-MB terminal changing its location from the first service area to the second service area; (c) controlling the MM-MB terminal and the mobile communication network to synchronize with each other; (d) assigning, by the mobile communication network, the IP of the MM-MB terminal according to the type of the MM-MB terminal used in the first service area; (e) The result of comparing and comparing the protocol for the video service of the mobile Internet network with the protocol for the video service of the mobile communication network is that the protocol for the video service of the mobile Internet network and the protocol for the video service of the mobile communication network are not the same. In this case, controlling the inter-network interworking device to convert the protocol for the video service of the mobile Internet network into the protocol for the video service of the mobile communication network; And (f) a MM-MB terminal performing a video telephone call with a counterpart terminal using a mobile communication network.;According to the present invention, even when a video telephone call is made using a video telephone service of a mobile internet network, even if the user moves out of the service area of the portable internet network to a service area of the mobile communication network, the video telephone call can be continued without interruption. .;Mobile Internet, Handover, Video Call, WiBro, Hand Over, VT, Video Telephony