A femtocell gateway apparatus arranged on a mobile IMS network comprises a conversion unit that when receiving a request from a terminal via a mobile network, transfers the request to a femtocell access point located in a home, reads a stream or file including at least one of video and audio, from at least one of devices connected to the femtocell access point and devices connected thereto via a home network, subjects the read stream or file to a conversion suitable for at least one of the capability of the terminal and the characteristics of the network, and outputs the stream or file converted. The output packet is then sent through a packet forwarding apparatus on the mobile network to the terminal.