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51. 发明专利

JP2002236162A POSITION CALCULATION METHOD AND POSITION CALCULATION DEVICE 审中-公开
公开(公告)号：JP2002236162A
公开(公告)日：2002-08-23
申请号：JP2001241932
申请日：2001-08-09
申请人： HITACHI LTD
发明人： KUWABARA MIKIO , ISHIDO TOMOAKI , YANO TAKASHI , FUJISHIMA KENZABURO
IPC分类号： G01S5/10
摘要： PROBLEM TO BE SOLVED: To provide a position calculation method capable of determining a proper position even when the ranging errors do not form a distribution symmetrical to positive and negative. SOLUTION: This position calculation method for calculating the position of a terminal device by using a propagation delay time of a received signal comprises a procedure wherein a first distance which is the difference between the distance between the terminal device and plural antennas calculated based on the propagation delay time of a radio signal, and the distance between the terminal device and a reference antenna is calculated, and a second distance which is the difference between the distance between the position of the terminal device assumed in calculation and the plural antennas, and the distance between the position of the terminal device assumed in calculation and the reference antenna is calculated, and likelihood of the position of the terminal device is calculated, and a procedure wherein the above procedure is repeated, to thereby retrieve a point where the likelihood becomes maximum, and the retrieved maximum likelihood point is defined as the position of the terminal device.

52. 发明专利

JP2002217824A METHOD AND DEVICE FOR MEASURING TRANSMISSION TIMING OFFSET OF RADIO BASE STATION 失效
公开(公告)号：JP2002217824A
公开(公告)日：2002-08-02
申请号：JP2001011658
申请日：2001-01-19
申请人： HITACHI LTD
发明人： OGINO ATSUSHI , KUWABARA MIKIO , ISHIDO TOMOAKI , FUJISHIMA KENZABURO
IPC分类号： G01S5/10 , G01S19/14 , H04B7/08 , H04B7/155 , H04B7/26 , H04W56/00 , H04W64/00 , H04W88/02 , G01S5/14
摘要： PROBLEM TO BE SOLVED: To correctly measure the offset of transmission timing which occurs in a base station. SOLUTION: This offset measuring method for receiving a signal transmitted from the radio base station and measuring the offset of transmission timing of the radio base station, is for finding offset estimated values of transmission timing, on the basis of signals received at a plurality of observation points, and is for selecting the smallest offset estimated value among the offset estimated values to be defined as the offset estimated value of transmission timing of the radio base station.

53. 发明专利

JP2003250174A WIRELESS TERMINAL DEVICE 审中-公开
公开(公告)号：JP2003250174A
公开(公告)日：2003-09-05
申请号：JP2002049447
申请日：2002-02-26
申请人： HITACHI LTD
发明人： KUWABARA MIKIO , MIZUGAKI KENICHI , OGINO ATSUSHI , FUJISHIMA KENZABURO
IPC分类号： H04W64/00 , H04Q7/34
摘要： PROBLEM TO BE SOLVED: To provide a wireless terminal device for calculating an accurate location by excluding the effect of a repeater station without the need for complicated processing. SOLUTION: The wireless terminal device related to this invention that receives signals from a plurality of wireless stations transmitting the signals to the wireless terminal device and calculates its own location by the received signals, includes: a repeater station detection means for detecting a signal from the repeater station for transmitting a signal which is produced on the basis of a signal among the received signals and hardly discriminated from the signal sent from the wireless station; and a location calculation means for excluding the detected signal from the repeater station when the repeater station detection means detects the signal from the repeater station and calculating the location of the terminal by using signals from other wireless stations. COPYRIGHT: (C)2003,JPO

54. 发明专利

JP2002280929A TERMINAL 失效
公开(公告)号：JP2002280929A
公开(公告)日：2002-09-27
申请号：JP2001081864
申请日：2001-03-22
申请人： HITACHI LTD
发明人： FUJISHIMA KENZABURO , KUWABARA MIKIO , TSUNEHARA KATSUHIKO , ISHIDO TOMOAKI
IPC分类号： G01S5/14 , H04B1/707 , H04B1/7113
摘要： PROBLEM TO BE SOLVED: To provide a terminal that can solve the problem of a conventional delay profile generating method, the to redundant calculations needing many calculation quantities resulting in a slow response and much power consumption in the terminal. SOLUTION: Changing a window for calculating a delay profile by each radio wave transmission source and for each time can reduce the calculation quantity. Thus, the reduced calculation amount accelerate the response of the terminal and reduces the power consumption.

55. 发明专利

JP2002277530A RADIO TERMINAL POSITION MEASURING INSTRUMENT 失效
公开(公告)号：JP2002277530A
公开(公告)日：2002-09-25
申请号：JP2001077417
申请日：2001-03-19
申请人： HITACHI LTD
发明人： FUJISHIMA KENZABURO , YANO TAKASHI , KUWABARA MIKIO , ISHIDO TOMOAKI
IPC分类号： G01S5/14 , H04W64/00 , H04Q7/34
摘要： PROBLEM TO BE SOLVED: To provide an accurate result of position calculation even if a terminal is moving, in the case of an instrument for measuring by radio the distance between the terminal and a specific signal generation source or between receivers, and calculating the position of the terminal from the result of the distance measurement. SOLUTION: This instrument is equipped with a terminal position presumption means for presuming movement histories for the position of the terminal, a likelihood calculation means for finding the likelihood of each movement history, and a position determination means for employing the end point of the most likely movement history as the result of position calculation.

56. 发明专利

JP2002236163A POSITION CALCULATION METHOD AND POSITION CALCULATION DEVICE 失效
公开(公告)号：JP2002236163A
公开(公告)日：2002-08-23
申请号：JP2001030859
申请日：2001-02-07
申请人： HITACHI LTD
发明人： KUWABARA MIKIO , ISHIDO TOMOAKI , YANO TAKASHI , FUJISHIMA KENZABURO
IPC分类号： G01S19/27 , G01S5/10 , G01S5/14 , H04W64/00 , H04Q7/34
摘要： PROBLEM TO BE SOLVED: To provide a position calculation method capable of determining a proper position even when the ranging errors do not form a distribution symmetrical to positive and negative. SOLUTION: This position calculation method for calculating the position of a terminal device by using a propagation delay time of a received signal comprises a procedure wherein a first distance which is the difference between the distance between the terminal device and plural antennas calculated based on the propagation delay time of a radio signal, and the distance between the terminal device and a reference antenna is calculated, and a second distance which is the difference between the distance between the position of the terminal device assumed in calculation and the plural antennas, and the distance between the position of the terminal device assumed in calculation and the reference antenna is calculated, and likelihood of the position of the terminal device is calculated, and a procedure wherein the above procedure is repeated, to thereby retrieve a point where the likelihood becomes maximum, and the retrieved maximum likelihood point is defined as the position of the terminal device.

57. 发明专利

JP2002232936A POSITION CALCULATION METHOD, POSITION CALCULATION DEVICE AND ITS PROGRAM 审中-公开
公开(公告)号：JP2002232936A
公开(公告)日：2002-08-16
申请号：JP2001241925
申请日：2001-08-09
申请人： HITACHI LTD
发明人： WATANABE KOJI , KUWABARA MIKIO , TSUNEHARA KATSUHIKO , FUJISHIMA KENZABURO
IPC分类号： H04J13/00 , H04W88/02 , H04Q7/34
摘要： PROBLEM TO BE SOLVED: To provide a position calculation method that can reduce a range finding error due to mis-detection of a path of a received signal. SOLUTION: This invention provides the position calculation method that calculates a position of a receiving point of a signal by using a propagation delay time of signals arrived from wireless transmission stations, includes a 1st step where a reception timing of a signal arrived from the wireless transmission stations is measured, a 2nd step where an erroneous measurement result is estimated on the basis of the measurement result of the reception timing obtained by the 1st step, and a 3rd step where a position of the receiving point is calculated except the measurement result estimated to be mis-measurement in the 2nd step on the basis of the measurement result of the reception timing obtained in the 1st step.

58. 发明专利

JP2002044713A PORTABLE APPARATUS 失效
公开(公告)号：JP2002044713A
公开(公告)日：2002-02-08
申请号：JP2000229020
申请日：2000-07-25
申请人： HITACHI LTD
发明人： FUJISHIMA KENZABURO , UCHIGIRI TATSUMI
IPC分类号： G06F15/02 , G06F17/30 , H04M1/00 , H04M3/42 , H04M3/493 , H04M11/00 , H04N5/225 , H04N5/765 , H04N5/907 , H04N5/91 , H04W4/12 , H04W88/02 , H04W88/08 , H04Q7/34
摘要： PROBLEM TO BE SOLVED: To provide a portable apparatus having a function to detect the position for each sound or video recording. SOLUTION: The portable apparatus is provided with position detecting means such that positional information in accordance with the current position is added to image information and voice information to be recorded.

59. 发明专利

JP2019004419A ネットワーク監視装置、そのシステム、およびその方法审中-公开
公开(公告)号：JP2019004419A
公开(公告)日：2019-01-10
申请号：JP2017119715
申请日：2017-06-19
申请人： HITACHI LTD
发明人： FUJISHIMA KENZABURO , TANIDA NAOKI , OHASHI TETSUYA
IPC分类号： H04L12/70 , H04L12/28
摘要：【課題】機器同士がネットワークに接続されたシステムにおいて、不正アクセス等に基づくネットワーク上の不審な通信を早期に検出すること。【解決手段】ネットワーク上を流れるパケットを監視するネットワーク監視装置であって、処理部と、インターフェースとを有し、インターフェースは、ネットワークのパケットをキャプチャするパケットキャプチャ部を有し、処理部は、学習期間及び監視期間において、キャプチャしたパケットから通信に関するパケット特徴量を、複数の監視観点で抽出し、学習期間において、複数の監視観点で抽出したパケット特徴量それぞれに対して定常性の判定をし、有効と判定した監視観点についてのモデルの作成をし、前記学習期間に定常性があるとした監視観点について、監視期間において抽出した前記パケット特徴量と、学習期間に作成した前記モデルとを比較して異常通信有無を判定することにある。【選択図】図2

60. 发明专利

JP2002228736A METHOD, DEVICE AND PROGRAM FOR COMPUTING POSITION 失效
公开(公告)号：JP2002228736A
公开(公告)日：2002-08-14
申请号：JP2001029560
申请日：2001-02-06
申请人： HITACHI LTD
发明人： WATANABE KOJI , KUWABARA MIKIO , TSUNEHARA KATSUHIKO , FUJISHIMA KENZABURO
IPC分类号： G01S5/10 , G01S19/06 , G01S19/14 , G01S19/46 , H04B7/26 , H04W64/00 , H04Q7/34
摘要： PROBLEM TO BE SOLVED: To reduce a distance measuring error due to a wrong detection of a pass of a received signal. SOLUTION: This method of computing position of a signal receiving point on the basis of transmission delay time of the signal from several radio transmission stations is formed of a first process for measuring receiving timing of the signal from the radio transmission station, a second process for estimating a wrong measurement result on the basis of a measurement result of the receiving timing obtained in the first process, and a third process for computing position of the receiving point by eliminating the measurement result estimated as the wrong measurement in the second process from the measurement result of the receiving timing obtained in the first process.

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