Apparatus and method for handover/roaming during file downloading/streaming

Apparatus and method for handover or roaming during a file download or streaming. Roaming in a streaming method in the fusion of Broadcasting and Mobile Service (CBMS) system, comprising: generating the streaming roaming or handover indication session description protocol information (the SDP), a fragment, or a notification message, and stores the SDP, a fragment, or notification message to the terminal.