METHOD AND APPARATUS FOR MULTIPLEXING HYBRID SATELLITE CONSTELLATIONS

    公开(公告)号:US20180376392A1

    公开(公告)日:2018-12-27

    申请号:US16012613

    申请日:2018-06-19

    Abstract: A method and apparatus for operating a satellite system including different satellites that may belong to different types of satellite constellations. In some implementations, the satellite system may include a LEO satellite constellation and one or more non-LEO satellite constellations that can be used to increase the forward link capacity of the LEO satellite constellation, for example, by allowing an LEO satellite to offload at least some of its forward link traffic to one of the non-LEO satellites. The user terminals can dynamically switch forward link communications between a LEO satellite and a non-LEO satellite while maintaining a return link connection with the LEO satellite.

    CONTENTION-BASED DATA TRANSMISSIONS ON RETURN LINK

    公开(公告)号:US20180288798A1

    公开(公告)日:2018-10-04

    申请号:US15996999

    申请日:2018-06-04

    Abstract: Methods and apparatuses are disclosed for a network controller to receive data from a user terminal (UT) via a satellite in a satellite system. The network controller may allocate contention-based resources of the satellite system to a plurality of UTs, and may activate the allocated contention-based resources by transmitting an activation signal to the plurality of UTs. The network controller may receive, from a first UT via a satellite of the satellite system, a first portion of data on a plurality of subframes of the contention-based resources during a time period, and may suspend the allocation of contention-based resources after an expiration of the time period or upon a grant of scheduled return link resources to the first UT, irrespective of collisions on the contention-based resources.

    CHANNEL QUALITY FEEDBACK IN SATELLITE COMMUNICATION SYSTEMS

    公开(公告)号:US20170238216A1

    公开(公告)日:2017-08-17

    申请号:US15042134

    申请日:2016-02-11

    Abstract: A method and apparatus for operating a user terminal in a satellite communication system during inter-beam handovers. In some aspects, the user terminal may determine an occurrence of an inter-beam handover for switching communication with a network controller of the satellite communication system from a first beam to a second beam. The user terminal measures a channel quality of the second beam based at least in part on the occurrence of the inter-beam handover, and sends the channel quality measurement to the controller via a reverse-link communication.

    EPFD coverage for NGSO satellites
    85.
    发明授权
    EPFD coverage for NGSO satellites 有权
    NGF卫星的EPFD覆盖

    公开(公告)号:US09585150B2

    公开(公告)日:2017-02-28

    申请号:US14864791

    申请日:2015-09-24

    Abstract: A method and apparatus for operating one or more satellites in a non-geosynchronous orbit (NGSO) satellite constellation are disclosed. In some aspects, a coverage area on Earth for a first beam transmitted from a first satellite in the NGSO satellite constellation may be determined, a cone may be projected onto a first region of the beam coverage area, a second region of the beam coverage area may be defined as including portions of the beam coverage area lying outside the first region, and a minimum arc angle for each of a plurality of points within the first region but not the second region of the beam coverage area may be determined.

    Abstract translation: 公开了一种在非地球同步轨道(NGSO)卫星星座中操作一个或多个卫星的方法和装置。 在一些方面中,可以确定从NGSO卫星星座中的第一卫星发送的用于第一波束的地球上的覆盖区域,锥体可投影到波束覆盖区域的第一区域,波束覆盖区域的第二区域 可以被定义为包括位于第一区域之外的波束覆盖区域的部分,并且可以确定波束覆盖区域的第一区域内但不是波束覆盖区域的第二区域中的多个点中的每一个点的最小弧角。

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