Ntt Docomo, Inc.

Ntt Mobile Communications Network, Inc.

Masatoshi Kimoto

Jin Hoshino

Susumu Ogata

Kazuya Sasaki

Shoichi Horiguchi

Tadashi Okamine

Yusuke Fukazawa

Toshiyuki Futakata

Yoshiaki Hiramatsu

Satoshi Kawasaki

Tsutomu Taguchi

Shin Oguri

A check-in determination apparatusconfigured to determine check-in indicating that a terminalhas entered a geofence which is a prescribed geographic area includes: a related geofence information storage unitconfigured to store related geofence information in which a related geofence which is another geofence is correlated with each geofence on the basis of a distance to the geofence; a check-in determination unitconfigured to determine check-in of the terminalsequentially with respect to each of the geofences. When it is determined that the terminalhas checked into one geofence, the check-in determination unitexcludes the related geofence correlated with the one geofence in the related geofence information stored by the related geofence information storage unitfrom determination targets in subsequent determination.

Check-in determining device

A check-in determination apparatusincludes: a determination history information storage unitconfigured to store determination history information for each terminal, in which position identifying information capable of identifying a position of the terminalwhen check-in of the terminalwith respect to the geofence was determined is correlated with geofence identifying information capable of identifying the geofence; a related geofence information storage unitconfigured to store related geofence information that correlates another geofence with each geofence; a position identifying information acquisition unitconfigured to acquire position identifying information of the terminal; and a check-in determination unitconfigured to determine check-in of the terminalwith respect to the geofence determined on the basis of the acquired position identifying information of the terminal, the stored determination history information, and the stored related geofence information.

Check-in determination device

A POI (Point Of Interest) information updating device () includes an input unit () configured to input POI identification information for identifying a POI, an acquisition unit () configured to acquire event information on an event performed at a target POI identified by the POI identification information input by the input unit, a search unit () configured to search for similar event information similar to the event information acquired by the acquisition unit (), and an updating unit () configured to update information on the target POI on the basis of information on a POI at which an event indicated by the similar event information searched for by the search unit () has been performed.

POI information updating device

A radio communication system includes a delay time acquiring unit configured to acquire a delay time of a signal transmitted between the mobile terminaland the base station; a position information acquiring unit configured to acquire a position of the base station; a calculating unit configured to calculate a position of the mobile terminalon the basis of the delay time acquired by the delay time acquiring unit, and the position of the base stationacquired by the position information acquiring unit; and a providing unit configured to provide mobile station position information indicating the position of the mobile terminal. When a predetermined exception condition is not satisfied, the providing unit provides, as the mobile station position information, the position of the mobile terminalcalculated by the calculating unit. When the predetermined exception condition is satisfied, the providing unit provides, as the mobile station position information, the position of the base stationacquired by the position information acquiring unit, instead of using the position of the mobile terminalcalculated by the calculating unit.

Radio communication system and position information providing apparatus

A position of a mobile communication terminal in an environment where the terminal cannot communicate with a GPS is defined more narrowly than a sector area of a base station in which the mobile communication terminal is located so that the position of the mobile communication terminal can be estimated more accurately. Even if a mobile communication terminal is in an environment where the terminal cannot communicate with a GPS, the latitude and longitude of the center of a sector of the wireless base station in which the mobile communication terminal is located is obtained according to a predetermined calculation by a base station database device, and the obtained latitude and longitude is sent back as an estimated latitude and longitude of the mobile communication terminal to the mobile communication terminal via the wireless base station.

Position estimation system

A position determination system includes a mobile terminal configured to receive GPS information from a GPS; a base station device configured to measure a round trip time (RTT) from the mobile terminal; a base-station position table unit configured to store position information on the base station device; a cable-length table unit configured to store a cable length between the base station device and an antenna assembly provided to the base station device, the antenna assembly communicates with the mobile terminal; and a position determination device configured to determine the position of the mobile terminal on the basis of the round trip time measured by the base station device, the cable length obtained from the cable-length table unit, the position information on the base station obtained from the base-station position table unit, and the GPS information received from the mobile terminal.

Position determination system and position determination method

A location estimating apparatushas an information acquiring part, an information storing part, and an arithmetic processing part. The information acquiring parthas a location information acquirerfor acquiring location information of a mobile object from information, and an error information acquirerfor acquiring error information from information. The information storing partstores the location information and error information sent from the information acquiring part, at each measurement time. The arithmetic processing partestimates a location from the location information and error information from the information acquiring part. The arithmetic processing partof the location estimating apparatus estimates the location of the mobile object by successively executing a first step of estimating a moving area per unit time of the mobile object, a second step of estimating an existing area at present of the mobile object, and a third step of estimating a location at present of the mobile object. This makes it feasible to provide location estimating means capable of achieving a high matching rate with an actual state, without use of other device information, while effectively utilizing information.

Location estimating apparatus and location estimating method

The present invention relates to a spreading signal assigning method and a signal transmitting method in a direct sequence CDMA mobile communication system, a mobile wireless communication system using the methods, and a transmitter, a receiver and a transceiver in the mobile wireless communication system in which an assignment method of a second spreading code is devised such that various services can be provided. The invention is configured such that a signal spread with the second spreading code is transmitted between a base station and a mobile station by assigning a code associated with each base station group or a code associated with each network type to which the base station group belongs as the second spreading code.

Method of assignment and transmission of spread signals in direct sequence spread spectrum CDMA mobile communication system, mobile communication system, and transmitter, receiver and transmitter/receiver of mobile communication system

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Yokosuka, Japan

Masatoshi Kimoto