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41 results about "Very-small-aperture terminal" patented technology
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A very small aperture terminal (VSAT) is a two-way satellite ground station with a dish antenna that is smaller than 3.8 meters. The majority of VSAT antennas range from 75 cm to 1.2 m. Data rates, in most cases, range from 4 kbit/s up to 16 Mbit/s. VSATs access satellites in geosynchronous orbit or geostationary orbit to relay data from small remote Earth stations (terminals) to other terminals (in mesh topology) or master Earth station "hubs" (in star topology).
Bandwidth reservation-based VSAT satellite communication system bandwidth distribution method
InactiveCN101986619AEasy to implementAllocation is fastRadio transmissionData switching networksTime delaysEffective management
The invention discloses a bandwidth reservation-based very small aperture terminal (VSAT) satellite communication system bandwidth distribution method, and relates to the technical field of satellite communication. In the method, different applications are endowed with different priorities based on the conventional bandwidth reservation-based dynamic bandwidth distribution method, and the high-priority application can occupy the bandwidth section occupied by the low-priority application, vice is not; and in actual distribution, when the bandwidth section corresponding to the application has no enough idle bandwidth, and the bandwidth sections with low priorities are searched in turn from high priorities to low priorities. The method keeps the advantages of the conventional bandwidth reservation-based dynamic bandwidth distribution method such as simple implementation, few channel fragments and high distribution speed, coordinates different QoS (quality of service) demands and application scenes, realizes effective management of channel resources, improves the utilization rate of satellite channel resources in a network environment of multiple service types, meanwhile, simplifies star-earth interaction and reduces the time delay caused by bandwidth distribution.
Owner:NANJING DANAO TECH
Method and system for efficient flow control in a spot beam satellite system
An approach for providing flow control in a radio communication system is disclosed. A request from a non-satellite system specific side of a transport interface is made to a system specific side of the transport interface for a flow control allocation that specifies an amount of data to be stored in a queue of the system specific side of the transport interface. The system specific side supports a signaling function that is based on a transmission characteristic of the radio communication system. The flow control allocation is generated based upon availability of the queue, wherein the destination address is a link layer address of the satellite communication system. This arrangement has particular applicability to a satellite network (e.g., Very Small Aperture Terminal (VSAT) network) that provides data communication services.
Owner:HUGHES NETWORK SYST
Transmodulator for very small aperture terminals employing internet protocol based communications
ActiveUS20080064323A1Promote migrationQuick exchangeBroadcast transmission systemsRadio/inductive link selection arrangementsTTEthernetTelecommunications
DVB-S / S2 transmodulator for VSAT units employing IP based communication. The transmodulator is optimized for VSAT networks, enabling legacy VSAT units to benefit from the developments of the advanced DVB-S2 standard. The transmodulator appears transparent to the legacy VSAT unit that is configured to operate with the older DVB-S standard. Some embodiments offer a unique feedback channel allowing the transmodulator to send messages and information to the ground station via the VSAT itself.
Owner:AYECKA COMM SYST
Maritime communication system and method
InactiveUS20130163516A1Efficiently provideIncrease speedAssess restrictionNetwork topologiesCommunications systemBroadcasting
Provided is a maritime communication system and method. A ship station of the maritime communication system may receive, from a maritime broadcast base station, maritime configuration information that includes setting information of shore base stations and setting information of maritime ship stations, may establish a radio link when a radio link configurable shore base station is present, may set the radio link through a radio link configurable neighbor ship station when the radio link configurable shore base station is absent, and may establish the radio link with an internal maritime satellite (INMARSAT) or a maritime very small aperture terminal (MVSAT) when the radio link configurable shore base station is absent and when the radio link configurable neighbor ship station is absent.
Owner:ELECTRONICS & TELECOMM RES INST
Transmodulator for very small aperture terminals employing internet protocol based communications
ActiveUS7603075B2Low implementation costPromote migrationBroadcast transmission systemsRadio transmissionInternet protocol suiteTTEthernet
DVB-S / S2 transmodulator for VSAT units employing IP based communication. The transmodulator is optimized for VSAT networks, enabling legacy VSAT units to benefit from the developments of the advanced DVB-S2 standard. The transmodulator appears transparent to the legacy VSAT unit that is configured to operate with the older DVB-S standard. Some embodiments offer a unique feedback channel allowing the transmodulator to send messages and information to the ground station via the VSAT itself.
Owner:AYECKA COMM SYST
Low cost VSAT MMIC transceiver with automatic power control
InactiveUS7076201B2Low costReduced functionalityResonant long antennasBroadcast transmission systemsMicrocontrollerAutomatic control
A very small aperture terminal (VSAT) transceiver of a VSAT terminal has a ceramic substrate board with transmitter, receiver and local oscillator circuits, including microwave monolithic integrated circuit (MMIC) chips positioned on the ceramic substrate board. A microcontroller is operative with the MMIC chips and an indoor unit of the VSAT terminal for controlling transceiver gain and output power. The microcontroller monitors one or both of the received signal strength of a signal received from a satellite in communication therewith and the signal-to-noise information from the indoor unit. The transceiver gain and output power is controlled by the microcontroller based on the received signal strength and / or the signal-to-noise information from the indoor unit.
Owner:REVEAL IMAGING
Method and system for efficient flow control in a spot beam satellite system
An approach for providing flow control in a radio communication system is disclosed. A request from a non-satellite system specific side of a transport interface is made to a system specific side of the transport interface for a flow control allocation that specifies an amount of data to be stored in a queue of the system specific side of the transport interface. The system specific side supports a signaling function that is based on a transmission characteristic of the radio communication system. The flow control allocation is generated based upon availability of the queue, wherein the destination address is a link layer address of the satellite communication system. This arrangement has particular applicability to a satellite network (e.g., Very Small Aperture Terminal (VSAT) network) that provides data communication services.
Owner:HUGHES NETWORK SYST
Satellite communication-based earthquake real-time monitoring system
InactiveCN101995582AIncrease the level of automationGuaranteed positionBatteries circuit arrangementsSeismic signal receiversInterference (communication)Three dimensional measurement
The invention discloses a satellite communication-based earthquake real-time monitoring system, which comprises a control center sub-system, a monitoring center sub-system, a displacement sensing sub-system, a solar power supply sub-system, a satellite global positioning system (GPS) high-precision positioning sub-system, a satellite GPS precision time service sub-system and a very small aperture terminal (VSAT) satellite communication sub-system. The three-dimensional measurement of earthquake waves in horizontal and vertical directions is realized by displacement sensor technology; equipment at all monitoring points is supplied with solar power; the three-dimensional navigation and positioning of the monitoring points are realized by using the GPS high-precision positioning technology with high anti-interference; the GPS precision time service system is used, so that the control center and all the monitoring points have the synchronous clock signals with the same frequency and the same phase; and the seamless coverage and networking of the monitoring system across China are realized by using the VSAT satellite communication technology.
Owner:CHENGDU LINHAI ELECTRONICS
Paired carrier multiplexing multiple-user access method
InactiveCN101808414ASolve the allocation problemConnection managementPhase-modulated carrier systemsBroadcast channelsMultiplexing
Owner:SHANGHAI NORMAL UNIVERSITY
Method and system for centrally exchanging terminal information over a meshed network
ActiveUS7730208B2Facilitates transparent introductionAdd featureMultiple digital computer combinationsRadio transmissionComputer networkMesh networking
An approach is provided for communicating in a meshed network including a first terminal and a second terminal. A request from the first terminal for obtaining address information of the second terminal is submitted to a hub. The hub generates a response including the address information and the context information that specifies capabilities of the second terminal. This arrangement has particular applicability to a satellite network (e.g., Very Small Aperture Terminal (VSAT) network) that provides data communication services.
Owner:HUGHES NETWORK SYST
System for real-time monitoring safety of large-sized building based on satellite communication
InactiveCN101995585AIncrease the level of automationGuaranteed positionTransmission systemsSeismic signal transmissionMonitoring siteInterference (communication)
The invention provides a system for real-time monitoring earthquakes. The system comprises a control center subsystem, a monitoring center subsystem, a satellite global position system (GPS) high precision positioning subsystem, a satellite GPS precision time service subsystem and a very small aperture terminal (VSAT) satellite communication subsystem; the capacities of three-dimensional navigating and positioning monitoring points are achieved by adopting a GPRS high precision positioning technology, thus the system has good anti-interference; by adopting the GPRS high precision positioning technology, the monitoring centre and each monitoring point have a synchronous clock signal of the same frequency and same phase; the seamless covering and networking of the monitoring system are achieved in national range by adopting the GPS precision time service system; and the VSAT satellite communication subsystem comprises a main station (control center), a satellite and 1-k numbered VSAT terminals (shift monitoring points).
Owner:CHENGDU LINHAI ELECTRONICS
Satellite capturing and tracking method for VSAT (Very Small Aperture Terminal) antenna system with physical level platform
The invention proposes a satellite capturing and tracking method for a VSAT (Very Small Aperture Terminal) antenna system with a physical level platform. The method is applicable to a control object such as an antenna system in a direction, pitching and rolling three-axis (A-E-C) pedestal form. The physical level platform is built in the antenna system, a local geographic coordinate system is also built on the physical level platform, thus, the theoretical direction and the pitching angle of an antenna points relative to a fixed local geographic coordinate system are consistent with the direction and the pitching angle of the antenna points relative to a mobile local geographic coordinate system on the physical level platform; and an electric shaft of the antenna is controlled to accurately point a satellite by a mode similar to a fixed antenna on the basis, and the satellite is automatically tracked when a carrier moves. According to the method provided by the invention, heading attitude participation operation is not needed to perform by the carrier in real time during the capturing and tracking process, thus, a shipborne compass system is not needed to install on the carrier, the environment condition requirement of the carrier is reduced, and the method is beneficial for promotion and application in a small-tonnage civil ship or a water carrier with limited equipment budge and equipment resource.
Owner:西安坤蓝电子技术有限公司
VSAT (Very Small Aperture Terminal) network time synchronization method
InactiveCN108134626AImprove Phase AccuracyFast clock recoveryRadio transmissionHigh level techniquesLoop filterNetwork clock
The invention discloses a VSAT (Very Small Aperture Terminal) network time synchronization method. The method comprises a reference station NCR (Network Clock Reference) transmission module and an earth station NCR receiving synchronization module, wherein the earth station NCR receiving synchronization module comprises an NCR extracting module, a local clock counting module, a phase discrimination module, a two-odor loop filter, a frequency control word addition module, a DA (Digital to Analog) module, a VCO (Voltage-controlled oscillator) module, a flash memory storage module and a delay compensation module. Through adoption of the VSAT network time synchronization method, frequency and time synchronization can be realized rapidly, and meanwhile a power-down memory function is realized.The method has relatively high practicability and creativity.
Owner:四川安迪科技实业有限公司
Optical sensor element and method for driving the same
Owner:KK TOSHIBA
Very small aperture terminal (VSAT) site diagnostics
An exemplary device samples a converter signal (e.g., input to a block up converter or output from a low noise block) at a very small aperture terminal site and identifies, as between a site converter and a site modem, a more likely faulty component to aid site diagnosis and repair.
Owner:VERIZON PATENT & LICENSING INC
Satellite communication system and method based on digital video broadcasting-return channel via satellite (dvb-rcs)
InactiveUS20140096153A1Improve link stabilityMinimizes service interruptionAnalogue secracy/subscription systemsRadio transmissionTelecommunicationsDVB-RCS
A satellite communication system and method based on a digital video broadcasting-return channel via satellite (DVB-RCS) are provided. The satellite communication system may include a central station, and at least one very small aperture terminal (VSAT) including a first VSAT and a second VSAT. When a logon request is received from the second VSAT, the central station may determine whether the first VSAT is normally operated. When the first VSAT is determined to be abnormally operated, the central station may allow the second VSAT to log onto the central station.
Owner:ELECTRONICS & TELECOMM RES INST
Very small aperture terminal with dual-input DC power control
The present invention relates to a satellite signal transmitter, and in particular, to a satellite signal transmitter with a dual-input DC power control switch.
Owner:WISTRON NEWEB
Method and device for controlling switching of VSAT satellite communication L-band up and down converters
InactiveCN103023552AShorten adjustment timeImprove operational reliabilityRadio transmissionProgramme control in sequence/logic controllersFrequency changerComputer module
The invention discloses a method for controlling switching of VSAT (Very Small Aperture Terminal) satellite communication L-band up and down converters, comprising the following steps of: step 1, system initialization; step 2, entering into a waiting state; and if an input command is detected in the waiting state, entering into step 3; step 3, command determination, and if the determination is true, starting step 4, otherwise, returning to the step 2; step 4, command processing; and step 5, control event processing, and returning to the step 2 if processing is finished. The invention also discloses a device for controlling switching of the VSAT satellite communication L-band up and down converters. With the method and device for controlling switching of the VSAT satellite communication L-band up and down converters provided by the invention, quick control is realized for the control of related modules of the up converter and the down converter, and parameter adjustment and control; real-time operation is realized for the input instructions; the parameter adjustment time is shortened; and the operation reliability and keenness of the satellite signal transmitting / receiving equipment are enhanced.
Owner:CHENGDU LINHAI ELECTRONICS
Integrated service processing method and system of satellite communication network
ActiveCN105530242AReal-time access to operating dataRealize multi-service operationTransmissionProduct typeTelecommunications
The invention discloses an integrated service processing method and system of a satellite communication network. The method comprises: obtaining a service order, sending service provisioning instructions to a satellite direct broadcast system, a very small aperture terminal and a remote education system according to the product types and / or service types in the service order, wherein the service provisioning instructions are used for provisioning services corresponding to the service types, receiving the feedback information returned by the satellite direct broadcast system, the very small aperture terminal and the remote education system, wherein the feedback information represents whether to provision the services. Through the method, the satellite direct broadcast system, the very small aperture terminal, the remote education system and so on can be effectively and uniformly scheduled, therefore multi-service and multi-system scheduling and monitoring can be realized, and further, the service processing efficiency of the system is promoted.
Owner:SPACE STAR TECH CO LTD
Channel estimation
Owner:GILAT SATELLITE NETWORKS
Test method for simulated down-converter in satellite demodulator
InactiveCN102571244AThe test method is accurateRelay systems monitoringFrequency changerSpectrograph
The invention discloses a test method for a simulated down-converter in a satellite demodulator. The test method is used for testing various parameters of the simulated down-converter. The simulated down-converter comprises an input interface, an output interface, a control interface and a power interface, wherein a signal source, a frequency spectrograph, a PC (Personal Computer) machine and a direct current power supply are connected with the input interface, the output interface, the control interface and the power interface of the simulated down-converter in turn. The frequency range test, the frequency resolution test, the gain and gain flatness test, the gain stability test, the fixed attenuation test, the wide / narrow band switching test, the AGC (Automatic Gain Control) function test and the AGC threshold test are performed in turn. The test method provided by the invention is accurate, stable and reliable. After all the parameters of a VSAT (Very Small Aperture Terminal) simulated down-converter meet the demand, the satellite demodulator is switched on.
Owner:CHENGDU LINHAI ELECTRONICS
Digital satellite communication system and method
InactiveCN1356782AActive radio relay systemsSpecific program execution arrangementsError checkDigital signal processing
In a digital satellite communications system for communicating data between a HUB station and a plurality of VSATs (Very Small Aperture Terminals) or between the VSATs via a communications satellite, each VSAT comprises: a digital signal processing section for demodulating signals received by the VSAT; ROM for storing a default program for letting the digital signal processing section execute signal demodulation at start-up of the VSAT; rewritable memory for storing an operation program for letting the digital signal processing section execute signal demodulation after the start-up of the VSAT; an operation program download section for obtaining the operation program by downloading the operation program from the HUB station; an error check / rewriting section for conducting error check to the downloaded operation program until an errorless operation program is obtained by the download and storing the errorless operation program in the rewritable memory; and a switching control section for switching a program which is loaded into and used by the digital signal processing section from the default program to the operation program.
Owner:NEC CORP
Method and apparatus for beam selection for a multibeam satellite communications system
An apparatus for beam selection for a multibeam satellite communications system including a very small aperture terminal (VSAT) with a remote satellite dish for sending and receiving RF signals and processor for calculating a normalized distance metric for user spot beams, selecting the user spot beam with the lowest normalized distance metric, and finding an outroute on the selected user spot beam using the remote satellite dish.
Owner:HUGHES NETWORK SYST
Remote photovoltaic power station cloud monitoring system for VSAT (Very Small Aperture Terminal) satellite communication
InactiveCN103151836AImprove continuityImprove reliabilityCircuit arrangementsTransmissionData acquisitionMonitoring system
The invention discloses a remote photovoltaic power station cloud monitoring system for VSAT (Very Small Aperture Terminal) satellite communication. The system comprises a plurality of intelligent photovoltaic modules, a data processing terminal, a VSAT satellite communication network, a data server, a solar photovoltaic power station remote monitoring system and a cloud side. A user can realize the real-time monitoring and the automatic and intelligent management of a monitored area on a remote PC (Personal Computer) terminal and the use scheme of a photovoltaic power station is intelligently determined through the cloud side. The remote photovoltaic power station cloud monitoring system for VSAT satellite communication has the advantages that the labor cost can be reduced, the continuity and the reliability of data acquisition are improved and the working efficiency is greatly improved, the system is economic and stable and is not restricted by geographical locations, and the like.
Owner:WUXI NANLIGONG TECH DEV
VSAT (Very Small Aperture Terminal) satellite communication L wave band up-converter control method
InactiveCN102970070AImprove operational reliabilityIncrease speedRadio transmissionFrequency changerIntermediate frequency
The invention provides a VSAT (Very Small Aperture Terminal) satellite communication L wave band up-converter control method, comprising the following steps: step 1, initializing a system; step 2, entering a waiting state, and entering step 3 if detecting that an input order exists in the waiting state; step 3, judging the order, entering step 4 if judging that the order is true, and returning back to step 2 if judging that the order is not true; step 4, processing the order; and step 5, controlling event processing and returning back to step 2 after the upper converter completes the operation. Controlling the event processing in step 5 comprises the following event processing of pre-selector arrangement, middle-frequency bandwidth arrangement, program control attenuation control, first local oscillator frequency control and second local oscillator frequency control. With the adoption of the VSAT satellite communication L wave band up-converter control method provided by the invention, the input order is received; relative modules of the upper-converter can be automatically controlled; and the corresponding parameters can be adjusted, so that the intelligent control can be realized; the real-time operation of the input order can be realized; the parameter adjusting time can be reduced; and the operation reliability and the rapidness of the upper-converter can be improved.
Owner:CHENGDU LINHAI ELECTRONICS
Multi-mode VSAT (Very Small Aperture Terminal) satellite communication signaling parsing system and parsing method
ActiveCN105846888ARealize screening and discriminationQuick responseRadio transmissionNetwork Communication ProtocolsComputer module
The invention discloses a multi-mode VSAT (Very Small Aperture Terminal) satellite communication signaling parsing system and a parsing method. The system comprises a signal receiving module and a data processing module, wherein the signal receiving module is used for receiving data forward and inputting the data into the system, and the data processing module is used for processing the data. The characteristics lie in that the system further comprises a frame type library, the frame type library is used for storing feature frames under different communication protocol modes, the feature frames are used for acting as a standard for judging whether data frames in the received data belong to data frames under corresponding communication protocols or not, and the judgment process is executed in the data processing module. The multi-mode VSAT satellite communication signaling parsing system provided by the invention is provided with the frame type library which can store multiple types of protocol feature frames, and screening and differentiation for different protocol type data are realized. Meanwhile, a new frame type write-in port and an original frame type modification port provided by the frame type library can enable frame types to be modified and corrected continuously and to be updated timely.
Owner:SICHUAN RUNZE JINGWEI INFORMATION TECH CO LTD
Method for controlling VSAT satellite communication L-band down converter
InactiveCN103023553AImprove operational reliabilityIncrease speedError preventionRadio transmissionFrequency changerAutomatic control
A method for controlling a VSAT (Very Small Aperture Terminal) satellite communication L-band down converter, comprising the following steps of: step 1, system initialization; step 2, entering the waiting state; and if an input command is detected in the waiting state, starting step 3; step 3, command determination, and if the determination is true, starting step 4, otherwise, returning to the step 2; step 4, command processing; and step 5, control event processing, and returning to the step 2 if the operation on the down converter is finished. The control event processing in the step 5 comprises processing of the following events: preselector setting, medium-frequency bandwidth setting, AGC / MGC (Automatic Gain Control / Manual Gain Control) control, first local oscillator frequency control and second local oscillator frequency control. With the method for controlling the VSAT satellite communication L-band down converter provided by the invention, smart control is realized for receiving of the input instruction, automatic control of related modules of the down converter, and corresponding parameter adjustment; real-time operation is realized for the input instructions; the parameter adjustment time is shortened; and the operation reliability and keenness of the down converter are enhanced.
Owner:CHENGDU LINHAI ELECTRONICS
Method for controlling VSAT satellite communication L-band down converter
InactiveCN103023553BImprove operational reliabilityIncrease speedError preventionRadio transmissionFrequency changerAutomatic control
A method for controlling a VSAT (Very Small Aperture Terminal) satellite communication L-band down converter, comprising the following steps of: step 1, system initialization; step 2, entering the waiting state; and if an input command is detected in the waiting state, starting step 3; step 3, command determination, and if the determination is true, starting step 4, otherwise, returning to the step 2; step 4, command processing; and step 5, control event processing, and returning to the step 2 if the operation on the down converter is finished. The control event processing in the step 5 comprises processing of the following events: preselector setting, medium-frequency bandwidth setting, AGC / MGC (Automatic Gain Control / Manual Gain Control) control, first local oscillator frequency control and second local oscillator frequency control. With the method for controlling the VSAT satellite communication L-band down converter provided by the invention, smart control is realized for receiving of the input instruction, automatic control of related modules of the down converter, and corresponding parameter adjustment; real-time operation is realized for the input instructions; the parameter adjustment time is shortened; and the operation reliability and keenness of the down converter are enhanced.
Owner:CHENGDU LINHAI ELECTRONICS
Intelligent energy efficiency monitoring system and method for twenty-thousand-ton bulk cargo ship
PendingCN111583053AHelp with communicationHelp each otherData processing applicationsVolume indication and recording devicesBulk cargoEngineering
The invention discloses an intelligent energy efficiency monitoring system and method for a twenty-thousand-ton bulk cargo ship. The system comprises a twenty-thousand-ton bulk cargo ship, an intranet, a man-machine interaction terminal, a firewall, a satellite communication controller, a very small aperture terminal and a land shore base station. The invention is mainly characterized in that an intranet is built in a twenty-thousand-ton bulk cargo ship, a man-machine interaction end is arranged in the intranet, one end of the firewall is connected with the man-machine interaction end, the other end of the firewall is connected with one end of the satellite communication controller, the other end of the satellite communication controller is connected with one end of the very small apertureterminal, and the other end of the very small aperture terminal is connected with the land shore base station. The ship energy consumption monitoring system has the beneficial effects that alarm prompt is carried out on energy consumption which is consumed in an out-of-range mode, communication with shipyards and ship shops can be provided so as to facilitate technical support and diagnosis decision making, and therefore the ship can operate with the minimum energy consumption.
Owner:DALIAN COSCO KHI SHIP ENG
Small Satellite Earth Station
Provided in the present application is a very small aperture terminal. The very small aperture terminal comprises an outdoor unit and an indoor unit. The outdoor unit comprises: a satellite antenna; a plurality of receivers, respectively communicatively connected to the satellite antenna to achieve various satellite data communication functions; an asynchronous serial interface hub, respectively connected to the plurality of receivers through multiple asynchronous serial interfaces; a first communication device, used to establish network connections with the plurality of receivers and the asynchronous serial interface hub, respectively, and transmit satellite data from the plurality of receivers to the indoor unit; and a first power-supply device, used to power the above devices within the outdoor unit. The indoor unit comprises: an information processing device, used to process the satellite data from the plurality of receivers; a second communication device, used to establish a network connection with the first communication device and the information processing device, and receive the satellite data from the first communication device and transmit the same to the information processing device; and a second power-supply device, used to power the above devices within the indoor unit.
Owner:PACIFIC TELECOM & NAVIGATION LTD
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