Kabushiki Kaisha Toshiba

Fujitsu Toshiba Mobile Communications Limited

Wan Wang

Akira Ishikura

Takashi Sakagawa

Moriaki Kiyomoto

A mobile terminal according to this invention includes the first calculation module which autonomously calculates its own position based on a GPS signal, and the second calculation module which calculates its own position based on a acquired auxiliary information from a server and the GPS signal. A first control module causes a timer to start a time counting if the second position calculation module accesses the server. When the auxiliary information which satisfies a predetermined condition is not acquired in the time of the timer, the calculation module changes from the second calculation module to the first calculation module. The second control module determines the connection state with the server within the time of the timer. At the time point if the second control module determines that the connection state is an auxiliary information unobtainable state, the calculation module changes from the second calculation module to the first calculation module.

Mobile terminal with position measurement function

According to one embodiment, a portable terminal includes: a display unit that displays a present location of the portable terminal; a GPS receiver that calculates theoretical precision data determined theoretically by geometric arrangement of plural GPS satellites on the basis of location information of the GPS satellites, and performs a positioning process by which positioning data for indicating the present location of the portable terminal is calculated using arrival time of the radio wave; and a control unit that repeats the positioning process performed by the GPS receiver plural times to calculate a cumulative average of the positioning data, and calculates a difference between the cumulative average of the theoretical precision data and the cumulative average of the positioning data to display a cumulative average of the positioning data, when the difference equal to or less than a predetermined value successively continues predetermined number of times, as the present location of the portable terminal.

Portable terminal

A system selection mode resetting function is newly added as a system selection mode to a mobile communication terminal apparatus having a plurality of system selection modes assigned different priorities. A system selection mode setting unit checks a system selection mode stored in the first memory in response to power-off or subsequent power-on. If the determination result reveals the presence of another mode higher in priority than the mode stored in the first memory, the mode stored in the first memory is reset to the higher-priority mode.

Growing community of inventors

Sagamihara, Japan

Wan Wang