The terminal apparatus 14 communicates in the same manner as that on a home link by notifying a destination address to a home agent 10 by a mobile router 15 and by generating a tunnel of a local scope between the router 15 and the home agent 10, even if it moves on a foreign link, the home agent 10 and the mobile router 15 transfer only to the required destination, by using the information of theterminal apparatus 14 for themselves to store, and the home agent 10 conducts a packet communication only with the terminal apparatus 14 corresponding to the destination, by managing the information of the terminal apparatus 14 for the mobile router to store. Therefore, wasteful transmission processings and reception processings inside a network are reduced.