Abstract: A data transmission method for transmitting data from a transmission-source information processing apparatus to a plurality of information processing apparatuses, includes: selecting an information processing apparatus from among the plurality of information processing apparatuses functioning as a relay information processing apparatus relay-transmitting data to another information processing apparatus, in accordance with the number of information processing apparatuses; transmitting the data to the relay information processing apparatus; and relay-transmitting the data received from the transmission-source information processing apparatus to the another information processing apparatus.

Abstract: A data transmission method for transmitting data from a transmission-source information processing apparatus to a plurality of information processing apparatuses, includes: selecting an information processing apparatus from among the plurality of information processing apparatuses functioning as a relay information processing apparatus relay-transmitting data to another information processing apparatus, in accordance with the number of information processing apparatuses; transmitting the data to the relay information processing apparatus; and relay-transmitting the data received from the transmission-source information processing apparatus to the another information processing apparatus.

Abstract: An information processing apparatus includes a backup data storage unit, a monitoring information storage unit and a backup data transfer unit. The backup data storage unit stores backup data. The monitoring information storage unit stores monitoring information that includes at least identification information and priority information of the backup data. The backup data transfer unit transfers the backup data to a backup server via a network in response to a transfer request for the backup data. The transfer request is received from the backup server on the basis of the priority information of the monitoring information which is notified to the backup server from the information processing apparatus.

Abstract: A session control method for radio terminals that implements a Multimedia Integrated network by Radio Access Innovation (MIRAI) such that selection of a radio access network does not impose a burden on each of the radio access networks, and an interface setup method for setting up IP connection quickly during switching of the radio access network. The Multimedia Integrated network by Radio Access Innovation (MIRAI) 10 includes heterogeneous radio access networks 11, Internet 12, and multimode radio terminals 13, and the heterogeneous radio access networks 11 includes a PHS network 11a, a wireless LAN 11b, a paging network 11c, and a cellular phone network 11d. The Internet 12 includes a CCN server 12a, which sends session-related information to the radio terminal 13 via the paging network 11c. The radio terminal 13 selects a radio IF and application that are appropriate for communication based on the session-related information, and establishes a session.