摘要:
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.
摘要:
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.
摘要:
A radio communication system includes a delay time acquiring unit configured to acquire a delay time of a signal transmitted between the mobile terminal 10 and the base station 20; a position information acquiring unit configured to acquire a position of the base station 20; a calculating unit configured to calculate a position of the mobile terminal 10 on the basis of the delay time acquired by the delay time acquiring unit, and the position of the base station 20 acquired by the position information acquiring unit; and a providing unit configured to provide mobile station position information indicating the position of the mobile terminal 10. When a predetermined exception condition is not satisfied, the providing unit provides, as the mobile station position information, the position of the mobile terminal 10 calculated 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 station 20 acquired by the position information acquiring unit, instead of using the position of the mobile terminal 10 calculated by the calculating unit.
摘要:
A location estimating apparatus 10 has an information acquiring part 12, an information storing part 18, and an arithmetic processing part 20. The information acquiring part 12 has a location information acquirer 14 for acquiring location information of a mobile object from information, and an error information acquirer 16 for acquiring error information from information. The information storing part 18 stores the location information and error information sent from the information acquiring part 12, at each measurement time. The arithmetic processing part 20 estimates a location from the location information and error information from the information acquiring part 12. The arithmetic processing part 20 of 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.
摘要:
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.
摘要:
A radio communication system includes a delay time acquiring unit configured to acquire a delay time of a signal transmitted between the mobile terminal 10 and the base station 20; a position information acquiring unit configured to acquire a position of the base station 20; a calculating unit configured to calculate a position of the mobile terminal 10 on the basis of the delay time acquired by the delay time acquiring unit, and the position of the base station 20 acquired by the position information acquiring unit; and a providing unit configured to provide mobile station position information indicating the position of the mobile terminal 10. When a predetermined exception condition is not satisfied, the providing unit provides, as the mobile station position information, the position of the mobile terminal 10 calculated 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 station 20 acquired by the position information acquiring unit, instead of using the position of the mobile terminal 10 calculated by the calculating unit.
摘要:
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.
摘要:
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.
摘要:
A location estimating apparatus 10 has an information acquiring part 12, an information storing part 18, and an arithmetic processing part 20. The information acquiring part 12 has a location information acquirer 14 for acquiring location information of a mobile object from information, and an error information acquirer 16 for acquiring error information from information. The information storing part 18 stores the location information and error information sent from the information acquiring part 12, at each measurement time. The arithmetic processing part 20 estimates a location from the location information and error information from the information acquiring part 12. The arithmetic processing part 20 of 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.