Hybrid constellation satellite communication systems and methods with efficient signaling and control

    公开(公告)号:GB2320163B

    公开(公告)日:2001-03-28

    申请号:GB9722726

    申请日:1997-10-29

    Applicant: MOTOROLA INC

    Abstract: A hybrid constellation satellite communication system (100) is established using two or more satellite types (110, 120) in different constellations. The two or more satellite types (110, 120) are connected to system control centers (140) via control links (105, 135) which provides a communication path from the satellite constellations to the system control centers (140). The two or more satellite types (110, 120) are also connected to subscriber equipment (150) via subscriber links (155, 145) which provides a communication path from the satellite constellations to the subscriber equipment (150). The first type of satellites (110) are interconnected using upper inter-satellite links (115). The second type of satellites (120) are interconnected using lower inter-satellite links (125). Control services and other time delay non-sensitive services are provided using communication channels established using the first type of satellites (110). Time delay sensitive services are provided using communication channels established using the second type of satellites (120). There are no inter-satellite links between satellites in the two different constellations.

    12.
    发明专利
    未知

    公开(公告)号:IT1299505B1

    公开(公告)日:2000-03-16

    申请号:ITRM980374

    申请日:1998-06-10

    Applicant: MOTOROLA INC

    Abstract: In a communication system having Low Earth Orbit (LEO) satellites (210), one or more Mission Operations Control Centers (MOCCs) (220), one or more Distributed Virtual Network Managers (DVNMs) (230), and several types of Customer Premises Equipment (CPE) (250, 260, 270, and 280), individual service providers (20) are able to control the network services they provide independently from other service providers (20) through local management of the DVNMs (230).

    13.
    发明专利
    未知

    公开(公告)号:NO20000595D0

    公开(公告)日:2000-02-04

    申请号:NO20000595

    申请日:2000-02-04

    Applicant: MOTOROLA INC

    Abstract: A laser transmitter (200, 300) includes a femptosecond pulse forming circuit (214, 308) and an ultra high-speed optical switch (218, 304) which enable the transmitter (200, 300) to generate a modulated pulse stream having pulses with widths of under 200 femptoseconds. The transmitted pulse stream is processed by a laser detector (500), including a wideband optical detector (504) and pulse stretching circuit (506), that regenerates information included in the modulated pulse stream.

    15.
    发明专利
    未知

    公开(公告)号:DK0655871T3

    公开(公告)日:1999-09-27

    申请号:DK94117930

    申请日:1994-11-14

    Applicant: MOTOROLA INC

    Abstract: A communication system (10) includes a population of mobile units (24) which communicate with a control station (29). Communications take place between the control station (29) and the mobile units (24) so that the system (10) may gain knowledge about the mobile units' locations. The mobile units (24) occasionally initiate such communications automatically. The control station (29) sends data defining a target area (72, FIG. 5) to the mobile units. The mobile units (24) reside in the target areas (72) when the target areas (72) are first assigned, but the mobile units (24) are free to move. The control station (29) transmits broadcast signals to geographically spaced apart cells (36, FIG. 2). The broadcast signals convey current data identifying the service areas covered by the cells (36). The mobile units (24) automatically initiate communications when their assigned target areas (72) do not coincide with the service areas for the broadcast signals they can receive.

    Method and apparatus for management of automatically initiated communication.

    公开(公告)号:GR3029858T3

    公开(公告)日:1999-07-30

    申请号:GR990400946

    申请日:1999-04-05

    Applicant: MOTOROLA INC

    Abstract: A communication system (10) includes a population of mobile units (24) which communicate with a control station (29). Communications take place between the control station (29) and the mobile units (24) so that the system (10) may gain knowledge about the mobile units' locations. The mobile units (24) occasionally initiate such communications automatically. The control station (29) sends data defining a target area (72, FIG. 5) to the mobile units. The mobile units (24) reside in the target areas (72) when the target areas (72) are first assigned, but the mobile units (24) are free to move. The control station (29) transmits broadcast signals to geographically spaced apart cells (36, FIG. 2). The broadcast signals convey current data identifying the service areas covered by the cells (36). The mobile units (24) automatically initiate communications when their assigned target areas (72) do not coincide with the service areas for the broadcast signals they can receive.

    17.
    发明专利
    未知

    公开(公告)号:IT1296120B1

    公开(公告)日:1999-06-09

    申请号:ITRM970695

    申请日:1997-11-12

    Applicant: MOTOROLA INC

    Abstract: A hybrid constellation satellite communication system (100) is established using two or more satellite types (110, 120) in different constellations. The two or more satellite types (110, 120) are connected to system control centers (140) via control links (105, 135) which provides a communication path from the satellite constellations to the system control centers (140). The two or more satellite types (110, 120) are also connected to subscriber equipment (150) via subscriber links (155, 145) which provides a communication path from the satellite constellations to the subscriber equipment (150). The first type of satellites (110) are interconnected using upper inter-satellite links (115). The second type of satellites (120) are interconnected using lower inter-satellite links (125). Control services and other time delay non-sensitive services are provided using communication channels established using the first type of satellites (110). Time delay sensitive services are provided using communication channels established using the second type of satellites (120). There are no inter-satellite links between satellites in the two different constellations.

    19.
    发明专利
    未知

    公开(公告)号:FR2764754A1

    公开(公告)日:1998-12-18

    申请号:FR9807422

    申请日:1998-06-12

    Applicant: MOTOROLA INC

    Abstract: A method and apparatus have been described for combining multiple satellite constellations into a cooperative network. A GEO tier (10) of satellites receives information to be broadcasted to earth. The GEO tier (10) receives the information from global hubs (30), regional hubs (32), and local hubs (34). Local program material is combined with regional and global program material by either the regional hub (32) or a GEO satellite (40).

    20.
    发明专利
    未知

    公开(公告)号:FR2758041A1

    公开(公告)日:1998-07-03

    申请号:FR9716482

    申请日:1997-12-24

    Applicant: MOTOROLA INC

    Abstract: A channel management process (68) is performed by a parent base station (36) of a radio telecommunications system (20) that exchanges channel usage data with neighbor base stations (38) within its local group (34). When channel usage data indicates a channel assignment conflict, that conflict is resolved in the base station (22) having the lesser loading of the pair of conflicting base stations (22). Channel usage requests received by a base station (22) are prioritized and sequentially processed, channels (58) being assigned for inter-cell handoff requests, then intra-cell handoff requests after inter-cell handoff requests, even when that assignment creates a conflict, and then channels (58) being assigned to new call requests after handoff requests if that assignment does not create a conflict.

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