A data transmission method for classifying network connections and
transmitting multimedia data is described. After distinguishing
multimedia connections from non-multimedia connects, multimedia packets
are classified and consolidated into packet groups and then the packet
groups are transmitted. The method for transmitting multimedia data
comprises the following steps. First, determine whether a connection is
used for transmitting multimedia data or not. If it does, the packets are
consolidated into a packet group. Finally, forward the packet group
according to a predetermined order after the packet group is assembled.