Method for saving energy of mobile node control using wireless multiple interface

PURPOSE: An energy saving type mobile node controlling method which utilizes a wireless multi-interface is provided to perform a communication by forming a dynamic group between mobile nodes in consideration of a feature of a wireless interface about a mobile node which has various wireless interfaces in a small scale network. CONSTITUTION: An information processor (910) manages information of mobile nodes which mount one or more wireless interfaces which are included in a local network. The information processor comprises one or more groups about the mobile nodes in consideration of the kind of the wireless interface of the mobile nodes. The information processor selects a representative node about each of the one or more groups. A communication unit (930) is connected to an external internet protocol (IP) network. The communication unit communicates with mobile nodes which include a broadband wireless interface among multiple mobile nodes which are included in the local network. [Reference numerals] (910) Information processor; (920) Storage unit; (930) Communication unit