| 摘要 |
PROBLEM TO BE SOLVED: To realize the mobile terminal with low power consumption and a long continuous speech time by reducing frequency of execution of a position registration request from the mobile terminal while attaining communication via each mobile communication network based on different mobile communication systems. SOLUTION: A GSM network 1 and a PHS network 2 make prescribed position registration processing with respect to a mobile terminal 3 in response to reception of a position registration request from the mobile terminal 3 and request the position registration of the mobile terminal 3 to other network. Upon the receipt of even a request of position registration of the mobile terminal 3 from other network, the GSM network 1 and the PHS network 2 make prescribed position registration processing with respect to the mobile terminal. |
