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公开(公告)号：JP2001208825A
公开(公告)日：2001-08-03
申请号：JP2000343675
申请日：2000-11-10
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORG J , ZHAO YILIN , HART ROGER C
Abstract: PROBLEM TO BE SOLVED: To provide an improved method and device for assisting position specifying in a radio communication system. SOLUTION: This is a cellular network protocol for minimizing a data flow required between a cellular infrastructure for supporting a GPS-based position determining function and each mobile hand set. Four concrete novel technology are introduced to minimize the number of bits required to be transmitted to the respective hand sets. Those are a method for reducing or eliminating a requisite as to a GPS ephemeris update for the each mobile station, a method for compressing a difference correcting broadcast message, a method for controlling a speed for updating an ephemeris of the each hand set by the network based on an ephemeris date limit, and a method utilized for determining, by the each mobile station, that the ephemeris update is required, based on precision prediction and a threshold value peculiar to the each mobile station, when the update is required.
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公开(公告)号：AU2003293143A8
公开(公告)日：2004-07-29
申请号：AU2003293143
申请日：2003-11-17
Applicant: MOTOROLA INC
Inventor： ZHAO YILIN , LO PETER ZHEN-PING , WABGAONKAR HARSHAWARDHAN
Abstract: Fingerprint image processing methods for fingerprint security systems, for example, in wireless communications devices, including capturing fingerprint images (320), identifying features from images (330), matching the identified features with reference features (340), and providing access to the device based upon feature matching (350) results. In one embodiment, minutiae features are extracted from the image and matched to reference minutiae features.
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公开(公告)号：BR0204225A
公开(公告)日：2004-06-08
申请号：BR0204225
申请日：2002-02-05
Applicant: MOTOROLA INC
Inventor： ZHAO YILIN , WANG HUGH
Abstract: Satellite positioning system enabled mobile receivers (310) and cellular communication network base stations (330) synchronized with satellite positioning system clocks and method therefore. In a network-assisted embodiment, a variable propagation delay for transmission of an assistance message (232) from the base station to the mobile receiver is determined for correcting the handset clock (318). In others embodiments, local clock drift of mobile receivers (310) and/or base stations (330) are determined by a ratio of local and satellite time differences, based on sequential time snapshots, for use in correcting the local clocks.
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公开(公告)号：GB2358977B
公开(公告)日：2003-07-30
申请号：GB0100619
申请日：2001-01-10
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J , ZHAO YILIN
IPC: G01S19/27 , G01C21/00 , G01S1/00 , G01S5/00 , G01S5/14 , G01S19/07 , G01S19/08 , G01S19/20 , H04Q7/34 , H04Q7/38 , G01S1/02
Abstract: A cellular network protocol that maintains the reliability of assisted GPS based positioning is taught. An Integrity Monitor (IM) informs mobile stations, their users, or networks of measurement quality and it warns them of failing and failed GPS satellites by isolating them from the effects of these failures. Whenever an unhealthy satellite is detected, its corresponding assistance data will be excluded for delivery or for position determination. In other words, there are two specific aspects to the Integrity Monitor (IM). For DGPS users, it predicts the reliability or quality of the DGPS corrections. For all users, it isolates the mobile position calculation from the effects of GPS satellite failures. The UDRE parameter, nominally output by a reference DGPS receiver, is used to communicate the DGPS quality information, and DGPS corrections are simply excluded for failed satellites. For autonomous GPS users, a special integrity message is required and defined to communicate the satellite failure status information.
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公开(公告)号：GB2360657A
公开(公告)日：2001-09-26
申请号：GB0027440
申请日：2000-11-09
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J , ZHAO YILIN
IPC: G01S19/27 , G01C21/00 , G01S1/00 , G01S5/00 , G01S5/14 , G01S19/07 , G01S19/08 , G01S19/20 , H04Q7/34 , H04Q7/38
Abstract: A cellular network protocol which maintains the reliability of assisted GPS based positioning is taught. An Integrity Monitor (IM) informs mobile stations, their users, or networks of measurement quality and it warns them of failing and failed GPS satellites by isolating them from the effects of these failures. Whenever an unhealthy satellite is detected, its corresponding assistance data will be excluded for delivery or for position determination. In other words, there are two specific aspects to the Integrity Monitor (IM). For DGPS users, it predicts the reliability or quality of the DGPS corrections. For all users, it isolats the mobile position calculation from the effects of GPS satellite failures. The UDRE parameter, nominally output by a reference DGPS receiver, is used to communicate the DGPS quality information, and DGPS corrections are simply excluded for failed satellites. For autonomous GPS users, a special integrity message is required and defined to communicate the satellite failure status information.
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Patent Agency Ranking
公开(公告)号：GB2358976A
公开(公告)日：2001-08-08
申请号：GB0027434
申请日：2000-11-09
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J , ZHAO YILIN , HART ROGER C
Abstract: In a mobile radio communication system, a method for locating handset 104 comprises receiving initial GPS ephemeris data, clock correction data and differential GPS (DGPS) correction data from a reference receiver 118 and base station controller 110, and determining whether the GPS ephemeris data for one or more of the plurality of GPS satellites 120 requires update. If so, a request for updated GPS ephemeris data is made and received from the base station, possibly through a cellular network and transmission 101, and the location of the mobile handset 104 is determined using the initial GPS ephemeris data, the clock correction data, the DGPS correction data, and the updated GPS ephemeris data. The judgement as to whether the ephemeris data requires updating may involve estimating the likely accuracy of the computed location based on the initial ephemeris data, or determining whether the age of the ephemeris data has exceeded a predetermined age limit.
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公开(公告)号：FR2802037B1
公开(公告)日：2006-08-04
申请号：FR0014378
申请日：2000-11-09
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J , ZHAO YILIN
Abstract: A cellular network protocol which maintains the reliability of assisted GPS based positioning is taught. An Integrity Monitor (IM) informs mobile stations, their users, or networks of measurement quality and it warns them of failing and failed GPS satellites by isolating them from the effects of these failures. Whenever an unhealthy satellite is detected, its corresponding assistance data will be excluded for delivery or for position determination. In other words, there are two specific aspects to the Integrity Monitor (IM). For DGPS users, it predicts the reliability or quality of the DGPS corrections. For all users, it isolates the mobile position calculation from the effects of GPS satellite failures. The UDRE parameter, nominally output by a reference DGPS receiver, is used to communicate the DGPS quality information, and DGPS corrections are simply excluded for failed satellites. For autonomous GPS users, a special integrity message is required and defined to communicate the satellite failure status information.
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公开(公告)号：ES2179755B1
公开(公告)日：2004-09-16
申请号：ES200002697
申请日：2000-11-08
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J , ZHAO YILIN , HART ROGER C
Abstract: A cellular network protocol which minimizes the required data flow between the cellular infrastructure and each mobile handset supporting a GPS based positioning capability is taught. Four specific innovations are introduced which together minimize the number of bits required to be transferred to each handset: a method for reducing or removing the requirement for GPS ephemeris updates to each mobile; a method for compression of the differential correction broadcast message; a method for controlling the rate at which the network updates each handset's ephemeris based on an ephemeris age limit; and, finally, a method which each mobile can use to determine when an ephemeris update is needed, based on an accuracy prediction and a threshold which is unique to each mobile.
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公开(公告)号：AR028879A1
公开(公告)日：2003-05-28
申请号：ARP000105966
申请日：2000-11-13
Applicant: MOTOROLA INC
Inventor： ZHAO YILIN , KING THOMAS M , GEIER GEORGE J
IPC: G01S19/27 , G01C21/00 , G01S1/00 , G01S5/00 , G01S5/14 , G01S19/07 , G01S19/08 , G01S19/20 , H04Q7/34 , H04Q7/38 , H04B7/19
Abstract: Se refiere en general a sistemas de comunicacion por radio. Más en particular, se refiere a un método para mantener la integridad de la determinacion de la ubicacion de un microteléfono en un sistema de comunicacion por radio. Dichos sistemas de comunicacion por radio generalmente suministran comunicacion de voz y datos en dos sentidos entre ubicaciones remotas. La carga computacional que realiza el cálculo tradicional es significativa. El microteléfono debe incluir un procesador de alto nivel capaz de realizar los cálculos necesarios. Para aplicaciones de GPS, los errores de ubicacion reciben contribucion del reloj de satélite, la orbita del satélite, la prediccion de las efemérides, la demora ionosférica; la demora troposférica, y la disponibilidad selectiva (SA). Para reducir estos errores, se pueden aplicar correcciones de intervalos e intervalo-velocidad a las mediciones base del pseudo rango para crear una solucion de posicion que se precisa hasta algunos metros en ambientes abiertos. Una de dichas técnicas de correccion es el GPS diferencial (DGPS).
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公开(公告)号：AU756506B2
公开(公告)日：2003-01-16
申请号：AU7154900
申请日：2000-11-10
Applicant: MOTOROLA INC
Inventor： KING THOMAS M , GEIER GEORGE J , ZHAO YILIN , HART ROGER C
Abstract: A cellular network protocol which minimizes the required data flow between the cellular infrastructure and each mobile handset supporting a GPS based positioning capability is taught. Four specific innovations are introduced which together minimize the number of bits required to be transferred to each handset: a method for reducing or removing the requirement for GPS ephemeris updates to each mobile; a method for compression of the differential correction broadcast message; a method for controlling the rate at which the network updates each handset's ephemeris based on an ephemeris age limit; and, finally, a method which each mobile can use to determine when an ephemeris update is needed, based on an accuracy prediction and a threshold which is unique to each mobile.
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