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    LEO SATELLITE CONGESTION CONTROL ROUTING METHOD
    61.
    发明公开
    LEO SATELLITE CONGESTION CONTROL ROUTING METHOD 审中-公开

    公开(公告)号：US20240305364A1

    公开(公告)日：2024-09-12

    申请号：US18599958

    申请日：2024-03-08

    申请人： Beijing University of Posts and Telecommunications

    发明人： Jiaxin Zhang ,  Kaiwei Wang ,  Xing Zhang ,  Rui Li ,  Zhaoyang Chang ,  Yilong Zhang ,  Hang Lu

    IPC分类号： H04B7/185 ,  H04B7/19 ,  H04B7/195 ,  H04L45/00

    CPC分类号： H04B7/18584 ,  H04B7/19 ,  H04B7/195 ,  H04L45/32

    摘要： A Low Earth orbit (LEO) satellite congestion control routing method is disclosed, including: Step 1: A LEO satellite periodically detecting queue lengths of a plurality of ports and informing a Geostationary Earth Orbit (GEO) satellite of queue lengths of congested ports in the plurality of ports; Step 2: The GEO satellite sending the queue lengths of congested ports to a ground station, and a computing center of the ground station calculating link status weights according to the queue lengths of congested ports; Step 3: According to the link status weights, the computing center of the ground station determining a congestion area; Step 4: The computing center of the ground station calculating a routing table of satellites in the congestion area, and the ground station sending the routing table to a LEO satellite inside the congestion area; Step 5: The LEO satellite in the congestion area receiving the routing table, and performing end-to-end transmission of data packets to a destination LEO satellite according to the routing table.

    Scheduling satellite data transmissions using differing sets of ground stations
    62.
    发明授权
    Scheduling satellite data transmissions using differing sets of ground stations 有权

    公开(公告)号：US12058667B2

    公开(公告)日：2024-08-06

    申请号：US18362901

    申请日：2023-07-31

    申请人： Microsoft Technology Licensing, LLC

    发明人： Deepak Vasisht ,  Ranveer Chandra

    IPC分类号： H04W72/12 ,  H04B7/155 ,  H04B7/195 ,  H04B17/40

    CPC分类号： H04W72/12 ,  H04B7/155 ,  H04B7/195 ,  H04B17/40

    摘要： The disclosure herein describes transmitting data from a satellite using a ground station configured to both transmit and receive, and a set of ground stations configured to receive data from a satellite. An orbit of the satellite is determined over a schedule period and a subset of ground stations configured to receive data and not transmit data to the satellite is identified based on the determined orbit of the satellite. A transmission schedule associated with the satellite is then generated. For each ground station of the subset, a time interval during which the satellite is within communication range is determined, an expected transmission rate is estimated, and the time interval and the expected transmission rate are included in the transmission schedule. The transmission schedule is provided to the satellite via another ground station configured to both transmit and receive, whereby the satellite is configured to transmit data to the subset of ground stations based on the transmission schedule.

    Architecture For Providing Forecasts of Low Earth Orbit (LEO) Satellite Obscuration and Multipath
    66.
    发明公开
    Architecture For Providing Forecasts of Low Earth Orbit (LEO) Satellite Obscuration and Multipath 审中-公开

    公开(公告)号：US20240103181A1

    公开(公告)日：2024-03-28

    申请号：US18369114

    申请日：2023-09-15

    申请人： Spirent Communications Plc

    发明人： Jeremy C. BENNINGTON ,  Paul HANSEN ,  Esther ANYAEGBU ,  Samuel NARDONI ,  Matthew POTTLE

    IPC分类号： G01S19/25 ,  H04B7/195

    CPC分类号： G01S19/258 ,  H04B7/195

    摘要： Disclosed is a method of providing DOP forecasts for LEO navigation for routing of vehicles, aircraft, alerting humans in vehicles, or wireless devices, and bandwidth forecasts for LEO communications. The method includes accessing a 3D map of an area including structure solids and generating cuboids in spaces not contained in the structure solids; and iteratively over time increments, calculating LEO satellites visible from the cuboids using the map and, using at least the calculated visibility, determining forecasts for the cuboids at the time increments. Also included is compressing the determined forecast spatially and temporally; and distributing the compressed DOP forecast via a CDN, responsive to queries from requestors. Systems of the requestors can take into account the forecast for routing vehicles or alerting humans in vehicles to a predicted navigation impairment. Risk analysis is applied to improving computation and distribution of forecasts. Forecasts are applied to satellite deployment.

    Space communication method for IoT services and corresponding space telecommunications system
    68.
    发明授权
    Space communication method for IoT services and corresponding space telecommunications system 有权

    公开(公告)号：US11881928B2

    公开(公告)日：2024-01-23

    申请号：US16500778

    申请日：2018-03-27

    申请人： THALES

    发明人： Mathieu Gineste ,  David Niddam ,  Nicolas Chuberre

    IPC分类号： H04B7/185 ,  H04B7/195 ,  H04W74/08

    CPC分类号： H04B7/1858 ,  H04B7/18504 ,  H04B7/18517 ,  H04B7/195 ,  H04W74/0833

    摘要： A method of space communication for IoT or equivalent services increases the number of terminals served on a space transmission resource while limiting the signaling used by the terminal. This limitation is obtained on the one hand by the allotting to each terminal of a logical beam, corresponding to a predetermined fixed geographical area wherein the terminal lies. This limitation is obtained on the other hand by management, centralized at the level of a central entity for connecting to the space network, of the association of the terminal with a logical beam and of the association of the resources bound for the logical attachment beam. A space telecommunications system implements a method of space communication. The method of space communication allows transparent switchover from a terrestrial system to the space system when the terrestrial system and the space system are integrated to a high degree, particularly at the level of the terminal.

    Low latency satellite communication relay network
    69.
    发明授权
    Low latency satellite communication relay network 有权

    公开(公告)号：US11838097B2

    公开(公告)日：2023-12-05

    申请号：US17175795

    申请日：2021-02-15

    申请人： Patrick Bournes

    发明人： Patrick Bournes

    IPC分类号： H04B7/185 ,  H04B10/118 ,  H04B7/195

    CPC分类号： H04B7/18513 ,  H04B7/18508 ,  H04B7/18521 ,  H04B7/195 ,  H04B10/118 ,  H04B7/18541

    摘要： Methods and systems for free space communication comprising one or more satellites that may provide a continuous communication link between two or more terminals are disclosed. A first satellite may be configured to send and/or receive data signals from a first terminal through a first link, and a second satellite may be configured to send and/or receive data from a second terminal through a second link. The first satellite and the second satellite may be coupled through a crosslink. The satellites and the terminals may be positioned at a minimum latitude threshold in order to take advantage of the decreasing circumference of the earth at increasing latitudes. The system and the method may comprise dividing the communication pathway between into a plurality of smaller segments, which when linked together approximate an optimal pathway for low latency and enable maintaining of higher bandwidth between the two terminals.