| 摘要 |
PROBLEM TO BE SOLVED: To enhance the security of a mobile communication terminal and to protect an operator from an accident. SOLUTION: When a setting section 20 sets a position detection section 30 of a mobile phone 1 to a danger warning mode, the detection section 30 receives GPS information by a wireless signal from a GPS satellite (not shown) to continuously acquire geometrical position information of a current location of the mobile phone 1 and transmits the geographical position information to a map server 100 at an interval of 5 minutes. The map server 100 uses a searching section 60 to search map information in a range of 10 km square around the geometrical position indicative of the geometrical position information received from the mobile phone 1 from a map information storage section 55 storing the map information representative of the geometrical range of dangerous areas in the whole of Japan and returns the result to the mobile phone 1 via a communication section 10. A storage section 25 of the mobile phone 1 stores the map information received via a communication section 10. An information analysis section 35 confirms whether or not the geographical position of the current position is resident in a dangerous area on the basis of the geographical position information of the current position obtained by the position detection section 30 and the map information stored by the storage section 25 and allows a warning section 40 to raise a warning tone when in the dangerous area. COPYRIGHT: (C)2004,JPO
|
