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公开(公告)号：US20210135747A1
公开(公告)日：2021-05-06
申请号：US16478897
申请日：2017-02-02
摘要： A control station includes: a location managing unit that calculates communicable times for combinations of a satellite station and an earth station that can perform communication with each other, based on a location of a satellite station and locations of earth stations serving as candidates to which the satellite station transmits the data; a data managing unit that holds information on a retention state of the data in the satellite having generated the data; and a transmission predicting unit that calculates data transmission completion times for one or more transmission paths from the satellite station to the earth station, based on the communicable times and the information on a retention state of the data, and generates control information for satellite stations and the earth station in a transmission path determined based on the data transmission completion times, to transmit the data in the determined transmission path.
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2.发明申请公开(公告)号：US20210050883A1
公开(公告)日：2021-02-18
申请号：US16964443
申请日：2018-11-02
摘要： A reception device includes an equalization processing unit including a linear filter unit and a nonlinear filter unit and performing equalization process on a reception signal; a linear propagation channel estimation unit making propagation channel estimation using a known signal included in a reception signal to calculate a filter coefficient of the linear filter unit; and a synchronization processing unit performing synchronization process of correcting frequency deviation based on a signal output by the equalization processing unit, and when a predetermined condition is satisfied after executing first equalization process of outputting a reception signal filtered by the linear filter unit to the synchronization processing unit, the equalization processing unit starts second equalization process that is an adaptive equalization process of outputting a result of addition of a reception signal filtered by the linear filter unit and a reception signal filtered by the nonlinear filter unit to the synchronization processing unit.
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公开(公告)号：US20210058138A1
公开(公告)日：2021-02-25
申请号：US17090201
申请日：2020-11-05
摘要： A relay station includes a beam formation unit capable of emitting multiple beams to multiple respective emission areas. The beam formation unit forms clusters each from two or more of the emission areas, and emits the beams based on assignment information indicating which slot is assigned to which of the emission areas on a per cluster basis. One emission area belongs to multiple clusters.
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公开(公告)号：US20200244540A1
公开(公告)日：2020-07-30
申请号：US16847011
申请日：2020-04-13
IPC分类号： H04L12/24
摘要： A network management device according to the present invention includes a metric calculation unit that calculates, using location information of multiple nodes constituting a network, metrics for respective combinations of the nodes, a false detection determination unit that determines, using the metrics and using link estimation information, which is information indicating a combination of nodes presumed that has a link therebetween, a falsely detected link corresponding to a combination of nodes indicated as having a link therebetween in the link estimation information, but presumed that has no link therebetween in reality, and a non-detection determination unit that determines, using the metrics and the link estimation information, an undetected link corresponding to a combination of nodes indicated as having no link therebetween in the link estimation information, but presumed that has a link therebetween in reality.
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公开(公告)号：US20200044731A1
公开(公告)日：2020-02-06
申请号：US16476355
申请日：2017-02-06
摘要： A scheduler apparatus includes: a calculation unit to determine, on the basis of a time required for switching from a first orbiting satellite that is an orbiting satellite to which an earth station is currently directed to a second orbiting satellite candidate that is an orbiting satellite as a candidate for a second orbiting satellite that is an orbiting satellite to which the earth station is directed next, a future expected throughput between the earth station and the first orbiting satellite, and a future expected throughput between the earth station and the second orbiting satellite candidate, the second orbiting satellite and a switching timing at which the earth station switches a directed satellite from the first orbiting satellite to the second orbiting satellite; and an interface to transmit information on the second orbiting satellite and the switching timing determined by the calculation unit.
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公开(公告)号：US20180083741A1
公开(公告)日：2018-03-22
申请号：US15563742
申请日：2015-04-22
发明人： Katsuyuki MOTOYOSHI
CPC分类号： H04L1/1864 , H04B7/18513 , H04B7/195 , H04H20/74 , H04L5/0053 , H04W72/042
摘要： A satellite communication system includes a plurality of satellite communication ground apparatuses to decode data encoded by an error-detecting code received over a downlink channel, and request retransmission on data in which an error has been detected by the decoding, and a non-geostationary satellite to emit radio waves on the downlink channel to transmit data to the satellite communication ground apparatuses by the downlink channel, and retransmit data that the non-geostationary satellite has been requested by the satellite communication ground apparatuses to retransmit, intensively in a time period during which the non-geostationary satellite moves in a predetermined specific location in a satellite orbit.
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公开(公告)号：US20200186241A1
公开(公告)日：2020-06-11
申请号：US16614932
申请日：2017-07-13
IPC分类号： H04B7/185 , G01S19/07 , G01S19/04 , H01Q21/24 , H04B17/318
摘要： A transmitting station includes an amplifier unit that amplifies a transmitting signal, a transmitting antenna that wirelessly transmits the transmitting signal that has been amplified, and a controller unit that regulates a frequency of the transmitting signal and an input power to the amplifier unit on the basis of an estimation value of reception quality that is a signal quality when the transmitting signal is received by a receiving station.
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公开(公告)号：US20190044572A1
公开(公告)日：2019-02-07
申请号：US16073283
申请日：2016-04-19
发明人： Katsuyuki MOTOYOSHI
IPC分类号： H04B1/7073
CPC分类号： H04B1/7073 , G01S19/01 , H04B2001/70706 , H04B2201/7073 , H04W72/0453
摘要： A spread-spectrum-signal reception apparatus includes a controller to obtain a phase comparison value that is a phase of a spread code at a time at which initialization of a phase of the spread code is performed and which corresponds to a timing of a top of a frame of a received signal, and to output an initialization instruction including the phase comparison value when having determined that a current time is within a range of a time window; and a signal processor to demodulate the received signal in accordance with the spread code, to perform a frame synchronizing process on the demodulated signal to detect a frame timing, and to perform the initialization at a timing determined in accordance with a result of comparison between the phase comparison value included in the initialization instruction and a phase of the spread code at the frame timing.
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9.发明申请公开(公告)号：US20180145740A1
公开(公告)日：2018-05-24
申请号：US15568512
申请日：2015-04-30
发明人： Shigenori TANI , Hiroyasu SANO , Katsuyuki MOTOYOSHI , Akinori FUJIMURA , Futaba EJIMA , Kyoichiro IZUMI
CPC分类号： H04B7/082 , H04B7/10 , H04L1/0003 , H04L1/06 , H04L27/00 , H04W24/02 , H04W72/085
摘要： A transmitting station includes a transmitting antenna whose orientation direction is changeable, and a controller that controls the orientation direction of the transmitting antenna according to an orientation direction of the transmitting antenna determined together with receiving stations to receive data transmitted from the transmitting antenna based on estimate values of received signal quality at receiving stations that are candidates for receiving stations to receive data transmitted from the transmitting antenna. The transmitting station can maintain received signal quality at a plurality of receiving stations at a desired value or more in a data transmission system.
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10.发明申请SATELLITE COMMUNICATION SYSTEM, GATEWAY, SATELLITE REPEATER, COMMUNICATION NETWORK CONTROL STATION, SATELLITE COMMUNICATION METHOD, AND TERMINAL 审中-公开卫星通信系统，网关，卫星转发器，通信网络控制站，卫星通信方法和终端公开(公告)号：US20160352413A1
公开(公告)日：2016-12-01
申请号：US15111110
申请日：2014-12-17
CPC分类号： H04B7/18515 , H04B7/0695 , H04B7/18517 , H04B7/2041
摘要： In a satellite communication system to relay communication between a terminal and a gateway installed on the ground through a satellite repeater, the satellite repeater forms a user link beam for communicating with the terminal and a feeder link beam for communicating with the gateway in a same area, and changes frequency or polarization association with respect to each of the user link beam and the feeder link beam, based on a traffic situation. Thus, a capacity that can be communicated by the beam may be changed after satellite launching.
摘要翻译： 在卫星通信系统中通过卫星转发器中继在终端和安装在地面上的网关之间的通信，卫星中继器形成用于与终端进行通信的用户链路波束和用于在同一区域与网关进行通信的馈线链路波束 并且基于交通状况改变相对于每个用户链接波束和馈线链路波束的频率或极化关联。 因此，可以在卫星发射之后改变可以通过波束传送的容量。
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