MOBILE TERMINAL DEVICE AND HAND-OFF METHOD THEREOF

摘要

In a packet exchange type data communication network, a mobile terminal can realize a smooth continuous communication session even during transit regardless of the performance or function of a base station. In the terminal, when an access mechanism correlated is in an active state, each of lower node interfaces (101-1 to 101-M) can obtain connection to a packet exchange type data communication network (150) by using a home address HoA.1 or a C/O address CoA. BS1. When a lower node interface (101-a) loses the connection obtained by using the C/O address CoA. BS1, a multi-access judgment unit (104) instructs a mobility support unit (102) to establish a connection between the home address HoA.1 and a home address HoA.2 or a C/O address CoA. BS2 of another lower node interface (101-b). The mobility support unit (102) establishes a connection according to the instruction from the multi-access judgment unit (104).