Ntt Docomo, Inc.

Kentaro Itagaki

Jun Hashimoto

Makoto Takahashi

Nobuaki Sasao

Hisashi Takeshita

A positioning device for measuring a position includes a WLAN positioning calculation unit that performs first positioning, based on first radio waves from access points; a satellite positioning unit that performs second positioning, based on second radio waves from satellites; a positioning result determination unit that determines whether a positioning result by the WLAN positioning calculation unit exists within a predetermined range from position information or a measured position, based on the position information to be obtained during the second positioning by the satellite positioning unit or the measured position by the satellite positioning unit; and a positioning result adoption determination unit that determines whether the positioning result is adopted, based on a determined result by the positioning result determination unit.

Positioning device and positioning method

A positioning apparatus for performing a positioning operation based on distance to an access point includes an access point detection unit configured to detect an access point, a memory unit configured to store the access point detected by the access point detection unit for each of channels, a channel setup unit configured to set a channel to be scanned based on the access points in the memory unit, and a positioning operation unit configured to perform positioning based on the distance to the access point detected by the access point detection unit. The access point detection unit detects the access point based on the channel set by the channel setup unit.

Positioning apparatus and positioning method

A mobile terminal receives information adapted to the current location of the mobile terminal via a mobile communication network from an information service providing communication apparatus that sends information adapted to current locations of mobile terminals to mobile terminals. The mobile terminal repeats identifying the location of the mobile terminal, and calculates a linear movement distance of the mobile terminal between a past location of the mobile terminal and the current location of the mobile terminal. The mobile terminal transmits a signal indicating the current location if the linear movement distance is greater than a threshold, but does not transmit the signal indicating the current location if the linear movement distance is less than the threshold.

Mobile terminal and control method therefor

A mobile communication terminal () includes a mobile communication unit () that receives broadcast signals from base stations (, . . . ) through mobile communication, a wireless LAN positioning unit () that performs positioning calculation using wireless LAN communication, a GPS positioning unit () that performs positioning calculation through GPS positioning, a comparison unit () that compares the number of base stations from which broadcast signals are receivable by the mobile communication unit () with a predetermined number and determines whether the number of base stations is large or small, and a positioning system selection unit () that controls the wireless LAN positioning unit () to perform positioning calculation when the number of base stations is determined to be large and controls the GPS positioning unit () to perform positioning calculation when the number of base stations is determined to be small.

Mobile communication terminal and location system selection method

A positioning portion does not identify a position of a mobile terminal in a case in which a stationary continuation determiner determines that the mobile terminal has continued to be stationary during a period, the positioning portion identifies the position of the mobile terminal in a case in which the stationary continuation determiner determines that the mobile terminal has not continued to be stationary during the period and in which a traveling condition determiner determines that the mobile terminal is in traveling condition, and the positioning portion does not identify the position of the mobile terminal in a case in which the stationary continuation determiner determines that the mobile terminal has not continued to be stationary during the period and in which the traveling condition determiner determines that the mobile terminal is in a stationary condition.

Mobile terminal and control method for mobile terminal

A mobile terminal includes: a first manner of wireless communicator for conducting wireless communication with a client terminal; a second communicator for conducting wireless communication with a network (NW); storage for storing data; and communication control for causing data to be transmitted between communicators. The communication control causing data received via the second communicator to be stored when a client terminal is in a state in which the client terminal does not receive data, and causes the stored data to be transmitted by the first communicator when the client terminal is in a state in which the client terminal receives data. Further, the communication control causes the data received via the first communicator to be stored when wireless communication with the network is not possible, and causes the stored data to be transmitted by the second communicator when wireless communication with the network is possible.

Mobile terminal and mobile terminal data relay method

An HGW mobile devicecan perform data communication on the basis of a plurality of wireless communication methods with different theoretical maximum transmission speeds, i.e., on the basis of a mobile wireless communication method and a wireless LAN communication method. Since the HGW mobile deviceis provided with a mobile wireless communication unitand a wireless LAN communication unit, it is able to relay data transmission between an external networkand a client terminal. A transmission speed initializing unitsets a value according to a theoretical maximum transmission speed of the wireless communication method with the slower theoretical maximum transmission speed, i.e., the theoretical maximum transmission speed of the mobile wireless communication method, as an initial transmission speed for the wireless LAN communication unitto first start wireless LAN communication with the client terminalon the basis of the wireless LAN communication method.

Mobile wireless communication terminal and wireless communication method

Communication terminalreceives an MCC (Mobile Country Code) from a wireless base station located in one country and a wireless base station located in another country adjacent to the one country, using first communication unitA. Communication terminalobtains from storage unitsetting data on a wireless LAN, which is commonly associated with the countries indicated by the received MCCs. Second communication unitB carries out wireless LAN communication using the obtained setting data.

Communication terminal and control method

An object is to realize execution of an access point function while keeping power consumption low. A cell phonehas a relay unitfor relaying data transmitted between a digital cameraand a network, and a relay controllerfor changing an operation state of the relay unit, based on a location state in a mobile communication networkderived based on a reception situation of a signal from a base stationof the mobile communication network, and a location information in a wireless LANderived based on a reception situation of a signal from a base stationof the wireless LAN

Mobile terminal and communication control method

An object is to urge a communication terminal connecting (or belonging) to a mobile terminal, to carry out a handover. A cell phonehas a relay unitfor relaying data transmitted between a digital cameraand a network, and a relay controllerfor controlling the relay unit, based on a location state in a wireless LANderived based on a reception situation of a beacon from a base stationof the wireless LANdifferent from a mobile communication network. The relay controllercancels a connection to the digital camerawhen the mobile terminal is located inside an area of the wireless LAN

Growing community of inventors

Yokosuka, Japan

Kentaro Itagaki