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    Multi-tier satellite system and method of operation
    1.
    发明专利
    Multi-tier satellite system and method of operation 未知

    公开(公告)号：GB2344970A

    公开(公告)日：2000-06-21

    申请号：GB9929342

    申请日：1998-05-28

    Applicant: MOTOROLA INC

    Inventor： ZANCHO WILLIAM ,  KRUTZ MICHAEL WILLIAM ,  VATT GREGORY BARTON

    IPC: H04B7/185 ,  H04B7/195

    Abstract: A system for increasing call-handling capacity employs a multi-tier satellite network which includes one or more geosynchronous (GEO) satellites (12) and non-geosynchronous satellites (14). The GEO satellites (12) transfer non delay-sensitive data through the system, while the non-geosynchronous satellites (14) predominantly transfer delay-sensitive data through the system. In a preferred embodiment, a non-geosynchronous satellite (14) receives (102) a data packet, determines (112) whether or not the data packet is delay-sensitive, routes (114) a delay-sensitive data packet through the LEO network, and routes (116) a non delay-sensitive data packet to a GEO satellite (12).

    SISTEMA DE COMUNICACION VIA SATELITE EN UNA ORBITA INCLINADA.
    2.
    发明专利
    SISTEMA DE COMUNICACION VIA SATELITE EN UNA ORBITA INCLINADA. 未知

    公开(公告)号：MX9603047A

    公开(公告)日：1997-08-30

    申请号：MX9603047

    申请日：1995-11-13

    Applicant: MOTOROLA INC

    Inventor： VATT GREGORY BARTON

    IPC: H04B7/185 ,  B64G1/10 ,  B64G1/24 ,  H04B7/195 ,  B04G03/00 ,  H04B07/185 ,  H04B07/19

    Abstract: Un sistema mejorado de comunicacion telefonico celular vía satélite y de datos facilita una cobertura de satélites doble sobre al menos ochenta y cinco pro ciento de la tierra. Este sistema mejorado permite la comunicacion con teléfonos celulares portátiles y montados moviles (120). El sistema permite comunicaciones de dos formas en cualquier parte sobre o arriba de las tierra hasta una altura particular arriba de al tierra de varios cientos de kilometros náuticos. El sistema emplea un numero de satélites de orbita terrestre baja (12) que se mueven alrededor de la tierra en orbita. Los satélites (12) se inclinan en un ángulo entre 30 y 90 grados. Se proporcionan enlaces (102) desde los satélites directamente a los usuarios (120) y por medio de la red telefonica conmutada, publica (20) a otros usuarios. Los satélites (12) están interconectados por medio de enlaces en una estructura de anillo alrededor de la tierra. La conmutacion se realiza pro cada uno de los satélites (12).

    Satellite communication system at an inclined orbit
    3.
    发明专利
    Satellite communication system at an inclined orbit 未知

    公开(公告)号：GB2301511A

    公开(公告)日：1996-12-04

    申请号：GB9617584

    申请日：1995-11-13

    Applicant: MOTOROLA INC

    Inventor： VATT GREGORY BARTON

    IPC: H04B7/185 ,  B64G1/10 ,  B64G1/24 ,  H04B7/195 ,  B64G1/00 ,  B64G3/00 ,  H04B7/19

    Abstract: An improved satellite cellular telephone and data communication system facilitates dual satellite coverage over at least eighty-five percent of the earth. This improved system permits communication with hand-held and mobile-mounted cellular telephones (120). The system permits two-way communications anywhere on or above the earth up to a particular height above the earth of several hundred nautical kilometers. The system employs a number of low-earth orbiting satellites (12) moving about the earth in orbit. The satellites (12) are inclined at an angle between 30 and 90 degrees. Links (102) are provided from the satellites directly to the users (120) and via the public switched telephone network (20) to other users. The satellites (12) are interconnected via links in a ring structure surrounding the earth. Switching is performed by each of the satellites (12).

    SATELLITE-BASED RING ALERT APPARATUS AND METHOD OF USE
    4.
    发明专利
    SATELLITE-BASED RING ALERT APPARATUS AND METHOD OF USE 未知

    公开(公告)号：CA2201154A1

    公开(公告)日：1996-04-11

    申请号：CA2201154

    申请日：1995-07-28

    Applicant: MOTOROLA INC

    Inventor： OLDS KEITH ANDREW ,  VATT GREGORY BARTON ,  KURBY CHRISTOPHER NEIL

    IPC: H04B7/185 ,  H04Q7/38

    Abstract: A satellite communication system (116) provides users with global cellular coverage. To facilitate delivery of calls to users having subscriber units (300), a fixed channel is defined wherein subscriber units (300) are notified of incoming calls. Subscriber units (300) monitor this ring alert channel (48) and examine subscriber unit IDs (90) transmitted in a ring alert message (82) contained therein. When a subscriber unit (300) determines from the subscriber unit ID (90) that a call is being directed to it, it calls into a network to receive a call. Subscriber units (300) also monitor this fixed channel to receive a control channel directory identifying the location of a subscriber unit's broadcast (control) channels.

    6.
    发明专利
    未知

    公开(公告)号：DE69331361D1

    公开(公告)日：2002-01-31

    申请号：DE69331361

    申请日：1993-03-29

    Applicant: MOTOROLA INC

    Inventor： VATT GREGORY BARTON ,  LEOPOLD RAYMOND J

    IPC: H04B7/212 ,  H04B7/185 ,  H04B7/24

    Abstract: A network (10) of satellites (12) delivers communications through bi-directional communication links (16) between individual ones of the satellites. Each satellite terminates a plurality of links (16). All satellites are synchronized (60) to recognize a constant duration frame (52) structure. For each link (16) in the network (10), satellites at both ends of the link (16) simultaneously transmit data communications into their respective ends of the link (16) using the same frequency band. Transmissions into all links (16) supported by a satellite occur simultaneously. The transmissions continue (78) for a duration that is responsive to the distance between the satellites. Transmissions cease (80) for all links (16) supported by a satellite when the communications from the opposing link nodes have nearly propagated the entire distances between the satellites. After ceasing transmissions, each satellite receives the communications previously transmitted from the opposing satellites (12) into the links (16) therebetween.

    8.
    发明专利
    未知

    公开(公告)号：FR2737625A1

    公开(公告)日：1997-02-07

    申请号：FR9609634

    申请日：1996-07-31

    Applicant: MOTOROLA INC

    Inventor： VATT GREGORY BARTON ,  DIEKELMAN DENNIS PAUL ,  MAJOR JOHN E

    IPC: B64G1/10 ,  B64G1/24 ,  B64G1/66 ,  H04B7/185 ,  H04B7/195 ,  H04B7/00 ,  H04B15/00

    Abstract: Multiple, different, independent constellations (10, 20) of satellites (2, 21-23) share a portion of a common frequency spectrum such as a single carrier frequency. The satellites' antennas (11) may be either multi-beam or omni-directional, while those of earth stations (13, 14) are directional. When interference occurs between communications of a satellite (31) of a first constellation (10) and a satellite (41) of a second constellation (20), any of several interference-mitigation options may be employed, such as the first satellite (31) handing off communications to a second satellite (32) of the same constellation (10), or temporarily suspending communications. The remedial action may occur in response to either predicted or detected interference.

    SATELLITE COMMUNICATION SYSTEM AT AN INCLINED ORBIT
    9.
    发明专利
    SATELLITE COMMUNICATION SYSTEM AT AN INCLINED ORBIT 未知

    公开(公告)号：CA2180142A1

    公开(公告)日：1996-07-04

    申请号：CA2180142

    申请日：1995-11-13

    Applicant: MOTOROLA INC

    Inventor： VATT GREGORY BARTON

    IPC: H04B7/185 ,  B64G1/10 ,  B64G1/24 ,  H04B7/195 ,  H04Q7/36

    Abstract: An improved satellite cellular telephone and data communication system facilitates dual satellite coverage over at least eighty-five percent of the earth. This improved system permits communication with hand-held and mobile-mounted cellular telephones (120). The system permits two-way communications anywhere on or above the earth up to a particular height above the earth of several hundred nautical kilometers. The system employs a number of low-earth orbiting satellites (12) moving about the earth in orbit. The satellites (12) are inclined at an angle between 30 and 90 degrees. Links (102) are provided from the satellites directly to the users (120) and via the public switched telephone network (20) to other users. The satellites (12) are interconnected via links in a ring structure surrounding the earth. Switching is performed by each of the satellites (12).

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