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61.发明授权公开(公告)号：US11490305B2
公开(公告)日：2022-11-01
申请号：US16722204
申请日：2019-12-20
申请人： ViaSat, Inc.
发明人： Brian T. Sleight
摘要： Embodiments relate to systems and methods for modifying the playback rate of media data in order to improve craft-based media playback system performance during handover events in a communication system.
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公开(公告)号：US11463160B2
公开(公告)日：2022-10-04
申请号：US16824854
申请日：2020-03-20
申请人： ViaSat, Inc.
发明人： Aaron Mendelsohn , Donald Becker
摘要： Systems and methods are described for enabling flexible signal pathways within a satellite of a satellite communications system. For example, a pathway selection subsystem in a bent-pipe satellite enables a flexible arrangement of non-processed signal pathways that couple uplink antenna ports with downlink antenna ports via uplink and downlink pathway selectors. The pathway selectors can be dynamically reconfigured (e.g., on orbit), so that the configuration of the pathway selectors at one time can form one set of signal pathways between respective uplink and downlink antenna ports, and the configuration at another time can form a different set of signal pathways between respective uplink and downlink antenna ports. The pathway selection subsystem can have a simulcast mode which, when active, couples each of at least one of the uplink antenna ports with multiple of the user downlink antenna ports to form one or more simulcast signal pathways.
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公开(公告)号：US20220311509A1
公开(公告)日：2022-09-29
申请号：US17588713
申请日：2022-01-31
申请人： VIASAT, Inc.
摘要： Systems and methods are described for robust scheduling of beam switching patterns in satellite communications systems. Embodiments operate in context of a hub-spoke satellite communications architecture having a number of gateway terminals servicing large numbers of user terminals over a number of spot beams. The satellite includes switching subsystems that distribute capacity to the user beams from multiple of the gateway terminals in a shared manner according to a beam group switching pattern. The beam group switching pattern is robustly formulated to continue distributing capacity during gateway outages (e.g., when one or two gateway terminals are temporarily non-operational due to rain fade, equipment failure, etc.). For example, the beam group switching pattern can be formulated to minimize worst-case degradation of capacity across user beams, to prioritize certain beams or beam groups, etc.
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公开(公告)号：US20220255877A1
公开(公告)日：2022-08-11
申请号：US17543403
申请日：2021-12-06
申请人： VIASAT, Inc.
IPC分类号： H04L47/56 , H04L12/18 , H04L67/56 , H04L67/566 , H04L67/5682 , H04L47/80
摘要： Systems and methods are described for optimizing resource utilization in a communications network while also optimizing subscriber engagement with media content over the communications network. Requested content objects can be identified as delayable objects that can be queued for opportunistically delayed communication to both requesting and non-requesting subscribers. Queued delayed content objects are scored with an eye toward optimizing both subscriber engagement and utilization of opportunistically available communications link resources. For example, a storage manager calculates a likelihood that each subscriber will engage with the content if it is opportunistically delivered, and a scheduler calculates a priority order in which to queue each requested delayable content object. Content objects can then be multicast to the subscribers in priority order and with associated information that can be used by the subscribers to determine whether to locally store the content objects as they are opportunistically received.
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公开(公告)号：US20220216829A1
公开(公告)日：2022-07-07
申请号：US17703106
申请日：2022-03-24
申请人： VIASAT, INC.
摘要： Systems and methods are provided for compensating for mechanical acceleration at a reference oscillator. A reference oscillator provides an oscillator output signal and an accelerometer on a same platform as the reference oscillator, such that mechanical acceleration at the reference oscillator is detected at the accelerometer to produce a measured acceleration. A filter assembly, having an associated set of filter weights, receives the measured acceleration from the accelerometer and provides a tuning control signal responsive to the measured acceleration to a frequency reference associated with the system. An adaptive weighting component receives the oscillator output signal of the reference oscillator and an external signal that is provided from a source external to the platform and adjusts the set of filter weights for the filter assembly based on a comparison of the external signal and the oscillator output signal.
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公开(公告)号：US20220200697A1
公开(公告)日：2022-06-23
申请号：US17555225
申请日：2021-12-17
申请人： Viasat, Inc.
摘要： Systems and methods for supporting more flexible coverage areas and spatial capacity assignments using satellite communications systems are disclosed. A hub-spoke, bent-pipe satellite communications system includes: terminals; gateways; a controller for specifying data for controlling satellite operations in accordance with a frame definition including timeslots for a frame and defining an allocation of capacity between forward and return traffic. The satellite communications system may employ a satellite with a feed array assembly and may use on-board beamforming or ground-based beamforming. Beam hopping within timeslots of the frame may be used to provide coverage to different cells in different time periods. The flexible coverage areas may be provided using changes in satellite position, antenna patterns, or beam resource allocations.
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公开(公告)号：US11362415B2
公开(公告)日：2022-06-14
申请号：US17186639
申请日：2021-02-26
申请人： Viasat Inc.
发明人： Frederic Bongard , Xavier Aubry , Martin Gimersky
摘要： The described features include a scalable waveguide architecture for a waveguide device. The waveguide device may be split into one or more waveguide blocks instead of manufacturing increasingly larger single-piece waveguide devices. Described techniques provide for a radio-frequency (RF) seal between such waveguide blocks that may facilitate greater manufacturing tolerances while maintaining an effective RF seal at the junction of the waveguide blocks. The described techniques include channels within one or more waveguide blocks opening to the dielectric gap between the waveguide blocks. The channels may, for each of multiple waveguides joined at the interface between waveguide blocks, be included in one or both waveguide blocks and may be in a single waveguide dimension relative to the multiple waveguides, or extend for more than one waveguide dimensions.
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公开(公告)号：US20220115776A1
公开(公告)日：2022-04-14
申请号：US17512369
申请日：2021-10-27
申请人： Viasat, Inc.
IPC分类号： H01Q1/28 , H04B7/06 , H01Q21/28 , H04B7/185 , H01Q1/42 , H01Q3/08 , H01Q3/24 , H01Q21/06 , H01Q3/02 , H04B7/195 , H04B7/08
摘要： In one example, an antenna system is described. The antenna system includes a primary antenna on an aircraft. The primary antenna is mechanically steerable and has an asymmetric antenna beam pattern with a narrow beamwidth axis and a wide beamwidth axis at boresight. The antenna system also includes a secondary antenna on the aircraft, the secondary antenna including an array of antenna elements. The antenna system also includes an antenna selection system to control communication of a signal between the aircraft and a target satellite via the primary antenna and the secondary antenna. The antenna selection system switches communication of the signal from the primary antenna to the secondary antenna when a performance characteristic for communication with the target satellite satisfies a threshold due to a position of the aircraft relative to the target satellite.
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公开(公告)号：US11303937B2
公开(公告)日：2022-04-12
申请号：US16902156
申请日：2020-06-15
申请人： VIASAT, INC.
IPC分类号： H04N21/214 , H04L65/60 , H04L67/01 , H04L43/10 , H04L67/10 , H04B7/185 , H04W28/06 , H04W84/00
摘要： Embodiments provide efficient delivery of multiple media channels to in-transport terminals, for example, to reduce channel zapping delay in a bandwidth efficient manner. For example, an in-transport media (ITM) server can distribute multiple channel offerings to ITM clients in a transport craft. Meanwhile, the ITM server can monitor which channel offerings are presently being consumed via the ITM clients, and can transmit feedback to a remote media server, accordingly. Based on the feedback, the ITM server can receive the channel offerings from the remote media server, in such a way that one or more of the channel offerings is received as a low-fidelity instance when not presently being consumed via any of the ITM clients, and one or more of the channel offerings is received as a high-fidelity instance when presently being consumed via at least one of the ITM clients.
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70.发明授权公开(公告)号：US11296780B2
公开(公告)日：2022-04-05
申请号：US17003586
申请日：2020-08-26
申请人： Viasat Inc.
发明人： George M. Peponides
IPC分类号： H04B7/204 , H04B7/185 , H04L47/83 , H04L47/70 , H04L41/0896 , H04L43/16 , B64G1/10 , G08G5/00 , H04L41/147 , H04L41/08 , H04L43/0882 , H04W72/04
摘要： Methods, systems, and devices are described for providing dynamic spatial allocation of satellite capacity based on aircraft load forecasting. In embodiments, a satellite communications system provides network access service over a service area via a plurality of satellite user beams, predicts spatial network resource demand for the service area over one or more service periods based at least in part on forecasted travel paths of a plurality of mobile multi-user terminals over the one or more service periods and respective predicted service demands for the plurality of mobile multi-user terminals, determines a satellite capacity resource configuration for the plurality of satellite user beams for the one or more service periods based on the predicted spatial network resource demand, and then adapts at least one characteristic of the plurality of satellite user beams for the one or more service periods based on the determined satellite capacity resource configuration.
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