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    SYSTEM AND METHOD FOR EFFICIENT BROADCAST OF SATELLITE CONSTELLATION EPHEMERIS INFORMATION
    1.
    发明申请
    SYSTEM AND METHOD FOR EFFICIENT BROADCAST OF SATELLITE CONSTELLATION EPHEMERIS INFORMATION 审中-公开

    公开(公告)号：US20180074208A1

    公开(公告)日：2018-03-15

    申请号：US15700098

    申请日：2017-09-09

    申请人： Hughes Network Systems, LLC

    发明人： Channasandra RAVISHANKAR ,  John CORRIGAN ,  Deepak ARUR ,  Yash VASAVADA

    IPC分类号： G01S19/25 ,  G01S19/05

    CPC分类号： G01S19/258 ,  G01S19/00 ,  G01S19/02 ,  G01S19/05 ,  G01S19/06 ,  H04B7/18519 ,  H04B7/18591

    摘要： Approaches for efficient broadcast of satellite ephemeris information or data in NGSO satellite systems, based on Keplerian parametric models of the satellite orbits, are provided. Keplerian orbit parameters are utilized (e.g., parametric orbit models) for improved efficiency in broadcast of ephemeris data over use of point-wise vectors. The linear change and harmonic variations in Keplerian orbit parameters are accounted for, for example, based on the specification of the linear and harmonic terms, increasing accuracy and extending duration of validity of the orbit parameters. Data compression is employed by (i) differential encoding of orbital parameters, and (ii) exploiting the correlation between the harmonic (Fourier) coefficients model of the orbit parameters. An efficient transport mechanism entails classification of information in Classes with different repetition/update rates based on information types, significantly reducing required broadcast/update data rates while allowing for a wide variation in the orbit orientation.

    SYSTEM AND ARCHITECTURE FOR SPACE-BASED AND MOBILE TERRESTRIAL SENSOR VEHICLES, AND END-TO-END NETWORK FOR AGGREGATION AND PROCESSING OF SENSOR DATA
    2.
    发明申请
    SYSTEM AND ARCHITECTURE FOR SPACE-BASED AND MOBILE TERRESTRIAL SENSOR VEHICLES, AND END-TO-END NETWORK FOR AGGREGATION AND PROCESSING OF SENSOR DATA 有权
    基于空间和移动地面传感器车辆的系统和架构以及传感器数据的聚集和处理的端到端网络

    公开(公告)号：US20150024677A1

    公开(公告)日：2015-01-22

    申请号：US14337159

    申请日：2014-07-21

    申请人： Hughes Network Systems, LLC

    发明人： Rajeev GOPAL ,  Stanley KAY ,  James Lykins ,  Channasandra RAVISHANKAR ,  Yash VASAVADA

    IPC分类号： H04L29/08 ,  H04W24/00 ,  H04W40/36 ,  H04B7/185 ,  H04W72/04

    CPC分类号： H04L67/12 ,  H04B7/18515 ,  H04B7/2041 ,  H04L63/20 ,  H04W40/36 ,  H04W84/18

    摘要： A system is provided for reducing latency data collection from space-based sensor satellites. A mobile vehicle platform includes a sensor module configured to monitor certain conditions, circumstances, environments and situations occurring on or around, or associated with, the Earth, and to generate sensor data resulting from the monitoring. A relay satellite terminal is configured to execute data communications via a communications channel of a first satellite beam, wherein the data communications are configured to relay the sensor data, via satellites, to respective gateways for forwarding to a central processing facility for one or more of aggregation, processing, analysis and dissemination of the data. The relay satellite terminal is further configured to switch the data communications from the communications channel of the first satellite beam to a communications channel of a second satellite beam based on a position of the relay satellite terminal relative to the first and second satellite beams.

    摘要翻译： 提供了一种用于减少从基于天基的传感器卫星收集延迟数据的系统。 移动车辆平台包括被配置为监测在地球上或周围发生的某些状况，环境，环境和情况的传感器模块，并且产生由监测产生的传感器数据。 中继卫星终端被配置为经由第一卫星光束的通信信道执行数据通信，其中数据通信被配置为经由卫星将传感器数据中继到相应的网关，以转发到中央处理设备以用于一个或多个 汇总，处理，分析和传播数据。 中继卫星终端还被配置为基于中继卫星终端相对于第一和第二卫星光束的位置，将数据通信从第一卫星信号的通信信道切换到第二卫星信号的通信信道。

    Apparatus and Method for Synchronizing Communication Between Systems with Different Clock Rates
    4.
    发明申请
    Apparatus and Method for Synchronizing Communication Between Systems with Different Clock Rates 有权
    用于同步具有不同时钟速率的系统之间的通信的装置和方法

    公开(公告)号：US20160192303A1

    公开(公告)日：2016-06-30

    申请号：US14584652

    申请日：2014-12-29

    申请人： Hughes Network Systems, LLC

    发明人： Neil H. TENDER ,  Yash VASAVADA ,  Deepak ARUR ,  Tariq MUHAMMAD

    IPC分类号： H04W56/00 ,  H04B7/185

    CPC分类号： H04W56/001 ,  H04B7/18513

    摘要： An apparatus and method for synchronizing communication between systems having different clock rates, is described. The apparatus includes a communication unit, a synchronization unit, and an interface unit. The communication unit receives upstream information and generates a first sample stream representative of the upstream information based on a first clock rate. The synchronization unit converts the first sample stream to a second sample stream based on a second clock rate and in accordance with a predetermined burst plan. The interface unit receives the second sample stream at the second clock rate and outputs it based on the predetermined burst plan.

    摘要翻译： 描述了用于在具有不同时钟速率的系统之间同步通信的装置和方法。 该装置包括通信单元，同步单元和接口单元。 通信单元接收上行信息，并且基于第一时钟速率生成表示上行信息的第一采样流。 同步单元基于第二时钟速率并根据预定的突发计划将第一采样流转换为第二采样流。 接口单元以第二时钟速率接收第二采样流，并基于预定的突发计划输出它。

    SYSTEM AND ARCHITECTURE FOR SPACE-BASED AND MOBILE TERRESTRIAL SENSOR VEHICLES, AND END-TO-END NETWORK FOR AGGREGATION AND PROCESSING OF SENSOR DATA
    6.
    发明申请
    SYSTEM AND ARCHITECTURE FOR SPACE-BASED AND MOBILE TERRESTRIAL SENSOR VEHICLES, AND END-TO-END NETWORK FOR AGGREGATION AND PROCESSING OF SENSOR DATA 审中-公开
    基于空间和移动地面传感器车辆的系统和架构，以及传感器数据的聚合和处理的端到端网络

    公开(公告)号：US20150318916A1

    公开(公告)日：2015-11-05

    申请号：US14334658

    申请日：2014-07-17

    申请人： Hughes Network Systems, LLC

    发明人： Rajeev GOPAL ,  Stanley KAY ,  James Lykins ,  Channasandra RAVISHANKAR ,  Yash VASAVADA

    IPC分类号： H04B7/185 ,  H04L29/06

    CPC分类号： H04B7/18539 ,  B64G1/1021 ,  G01V1/008 ,  H04B7/18508 ,  H04B7/18519 ,  H04B7/18558 ,  H04L29/0621

    摘要： A system is provided for reducing latency data collection from space-based sensor satellites. A mobile vehicle platform, configured to travel around the Earth, includes a sensor module and a relay satellite terminal. The sensor module monitors certain conditions, circumstances, environments and/or situations occurring on or around, or associated with, the Earth, and generates sensor data resulting from the monitoring. The relay satellite terminal executes data communications with a first of a plurality of satellites while the mobile vehicle platform is in a first area within a communications range of the first satellite, and, upon moving to a second area within a communications range of a second of the plurality of satellites, the relay satellite terminal switches the data communications to the second satellite. The data communications relay the sensor data, via the satellites, to a central processing facility for aggregation, processing, analysis and/or dissemination of the data.

    摘要翻译： 提供了一种用于减少从基于天基的传感器卫星收集延迟数据的系统。 配置成围绕地球行进的移动车辆平台包括传感器模块和中继卫星终端。 传感器模块监测发生在地球上或周围或与之相关的某些状况，环境，环境和/或情况，并产生由监测产生的传感器数据。 所述中继卫星终端在所述移动车辆平台处于所述第一卫星的通信范围内的第一区域内时，与所述多个卫星中的第一卫星执行数据通信，并且在移动到所述第二卫星的通信范围内的第二区域 多个卫星，中继卫星终端将数据通信切换到第二卫星。 数据通信通过卫星将传感器数据中继到中央处理设施，用于数据的聚合，处理，分析和/或传播。

    APPARATUS AND METHOD FOR EFFICIENT HANDOVER FOR LOW EARTH ORBIT (LEO) SATELLITE SYSTEMS
    7.
    发明申请
    APPARATUS AND METHOD FOR EFFICIENT HANDOVER FOR LOW EARTH ORBIT (LEO) SATELLITE SYSTEMS 审中-公开

    公开(公告)号：US20190053119A1

    公开(公告)日：2019-02-14

    申请号：US16161936

    申请日：2018-10-16

    申请人： Hughes Network Systems, LLC

    发明人： Nassir BENAMMAR ,  Deepak ARUR ,  Channasandra RAVISHANKAR ,  Yash VASAVADA

    IPC分类号： H04W36/30 ,  H04B7/185 ,  H04W36/16 ,  H04W36/14 ,  H04W36/00 ,  H04W84/06 ,  H04W36/10

    摘要： Approaches for efficient, dynamic and continuous handover processes, which encompass selection of an optimal path (consisting of a satellite, a satellite beam and carrier frequency set) over which a mobile user terminal (UT) communicates with the radio access network in a mobile satellite communications system, are provided. A set of path factors are determined regarding each of a plurality of communications paths for the UT. A path selection metric (PSM) for each communications path is determined, wherein the PSM for each communications path is determined via a weighted calculation based on the respective set of path factors for the communications path. A decision is made as to whether to perform a handover of the UT from a first of the communications paths to a second of the communications paths, wherein the determination is based on an evaluation performed based at least in part on the PSM.

    APPARATUS AND METHOD FOR NETWORK LEVEL SYNCHRONIZATION IN MULTIPLE LOW EARTH ORBIT (LEO) SATELLITE COMMUNICATIONS SYSTEMS
    8.
    发明申请
    APPARATUS AND METHOD FOR NETWORK LEVEL SYNCHRONIZATION IN MULTIPLE LOW EARTH ORBIT (LEO) SATELLITE COMMUNICATIONS SYSTEMS 有权
    多个低地球轨道（LEO）卫星通信系统中网络级同步的装置和方法

    公开(公告)号：US20150270890A1

    公开(公告)日：2015-09-24

    申请号：US14663442

    申请日：2015-03-19

    申请人： Hughes Network Systems, LLC

    发明人： Yash VASAVADA ,  Channasandra RAVISHANKAR ,  Deepak ARUR ,  Michael PARR

    IPC分类号： H04B7/185 ,  H04W56/00

    CPC分类号： H04B7/1851 ,  H04B7/185 ,  H04B7/195 ,  H04W56/00

    摘要： A synchronization approach is provided that compensates for the large Doppler offset of the satellites in a LEO satellite system by exploiting the predictable and deterministic nature of the Doppler component, and thereby simplifies the delay and the Doppler domain uncertainty ranges that the physical layer receivers have to resolve. The compensation is based on the known ephemeris information of the LEO satellite and the known positions of the gateway (GW) and the user terminal (UT) on the ground. Utilizing the deterministic component of the LEO Doppler, the synchronization process continually tracks and compensates for the time-varying offsets between the GW and UT frame timing, frame numbering (FN), symbol timings, and Doppler-induced scaling of center frequency and the signal bandwidth.

    摘要翻译： 提供了同步方法，通过利用多普勒分量的可预测和确定性来补偿LEO卫星系统中卫星的大多普勒偏移，从而简化了物理层接收机必须具有的延迟和多普勒域不确定性范围 解决。 补偿基于LEO卫星的已知星历信息和地面上的网关（GW）和用户终端（UT）的已知位置。 利用LEO多普勒的确定性分量，同步过程连续跟踪和补偿GW与UT帧定时，帧编号（FN），符号定时和中心频率的多普勒引起的缩放之间的时变偏移量 带宽。