Provided is a Universal Plug and Play (UPnP) Internet Gateway Device
(IGD). A plurality of IGDs existing in a UPnP network interchange IGD
information that is managed in order to provide a gateway service with
each other, and thus the bandwidth of a device connected to the Internet
can be increased, handover of a device can be successfully performed in
the presence of an error of an IGD, and loads can be balanced between a
plurality of IGDs. Accordingly, various Internet services can be
efficiently provided to the UPnP device.