Abstract: A constellation of many satellites are actively maneuvered to maintain specified non-geosynchronous reference orbits. Each satellite is assigned a slot within a particular reference orbit. For each reference orbit, a set of orbital parameters including eccentricity and argument of perigee for frozen orbits are selected that are unique relative to other reference orbits in use. One characteristic of a frozen orbit is that at a given point in the orbit, altitude is relatively constant. At points where orbital planes of the reference orbits intersect, the differing sets of orbital parameters assure a vertical separation between satellites in different orbital planes is maintained without the need for evasive maneuvers. Actual orbital motion data is obtained from sensors onboard each satellite. The desired orbital parameters are maintained based on the actual orbital motion data as part of scheduled maneuvers to maintain the reference orbit assigned to that satellite.

Abstract: Apparatuses, methods, and systems are disclosed for uplink power control. One method includes: receiving a message that configures a set of resources that each includes a downlink resource or an uplink sounding resource and is associated with an uplink transmission beam pattern; receiving scheduling information for an uplink transmission that is associated with a resource of the set of resources; determining an uplink transmission beam pattern associated with the resource; determining a configured maximum output power for the uplink transmission beam pattern that is based on an antenna array property associated with the uplink transmission beam pattern; determining a transmit power for the uplink transmission based on the configured maximum output power; and performing the uplink transmission using the uplink transmission beam pattern based on the transmit power.

Abstract: Communication systems and methods for routing data selecting via unicast paths and multicast path are disclosed. An example communication system includes: a satellite; a satellite modem configured to operate within a movable vehicle, wherein the satellite modem is configured to communicatively couple with the satellite, and wherein the satellite modem is configured to convey data, received from the satellite over a forward link (FL), to a user device within the vehicle; and a satellite ground station having a multicast server, wherein the multicast server is configured to select one of a unicast mode or a multicast mode for the FL based upon a measured receive signal-to-noise ratio (SNR) associated with the satellite modem, wherein the satellite communicates with the satellite modem over the FL in the selected one of the unicast mode or the multicast mode.

Abstract: A system and method for managing a terminal uplink power, and a terminal having uplink power managed by a gateway are provided. The method including: dividing, at a gateway, a beam coverage area into sub-beams and each of the sub-beams into one or more frequency bins; associating a sub-beam of the sub-beams with terminals located within the sub-beam; determining Transmit Power (TP) values including a transmit power or attenuation for each of the one or more frequency bins of the sub-beam; sending, from the gateway, the TP values of the sub-beam to the terminals via a forward link; and receiving, at the gateway, a burst transmitted using a terminal transmit power calculated from the TP values of the sub-beam. The TP values may change in response to an SNR measurement at the gateway and/or feedback from the terminal.

Abstract: This application provides a communication method that includes grouping a plurality of clients to obtain at least two device groups, where each of the at least two device groups includes at least two clients. The method further includes receiving a publish request sent by a first client, where the publish request includes first data that corresponds to a first topic. The publish request is used to request a message queue telemetry transport (MQTT) server to publish the first data. After it is determined that a first device group to which the first client belongs from the at least two device groups, a publish message that includes the first data is sent to a second client in the first device group.

Abstract: Systems and methods for correcting beam weighting factors for a radio system include obtaining measurements of cross-polarization transfer functions between respective pairs of dual-polarized antenna elements in the antenna system and computing coupling values for the respective pairs and reflection coefficient values by numerically solving a system of equations in which a subset of the coupling values are set to zero and the measurements of the cross-polarization transfer functions of the respective pairs are a function of the coupling values for the respective pairs of the dual-polarized antenna elements and the reflection coefficient values. Correction factors are computed for the antenna elements based on the computed coupling values and reflection coefficients. Based on the respective correction factors, beam weighting factors are calculated for at least some of the antenna elements for a desired beam direction.

Abstract: A wireless device comprises a transceiving circuit, configured to receive a plurality of beam performance parameters corresponding to a plurality beams; a storage circuit, configured to store a table, wherein corresponding relationships between the plurality beams and the plurality of beam performance parameters are tabulated in the table; and a processing circuit, configured to perform the following steps: selecting a first beam according to the table; determining whether a first beam performance value corresponding to the first beam is less than a threshold; and selecting a second beam according to the table when the first beam performance value is less than the threshold.

Abstract: System and method for forecasting availability of network services during flight is provided. The system of the disclosed invention utilizes flight plans and coverage data to provide users aboard aircraft with status of satellite Internet services. The system couples the flight plans with the coverage data to provide information regarding how the flight path of the aircraft will affect availability of Internet services during the flight. The method includes retrieving a flight plan to generate a flight path having one or more waypoints, transmitting one or more service coverage data from service providers, coupling the flight path with the service coverage data to determine portions of the flight path in which the network service is unavailable, and delivering to the users information about the service unavailable portions of the flight path.

Abstract: A radio frequency energy-harvesting apparatus is applied to a radio frequency energy-transmitting apparatus with a location detection function. The radio frequency energy-harvesting apparatus includes a direct current signal receiving-processing unit, a rectification and harmonic generation unit, and a radar wave receiving-transmitting unit. The rectification and harmonic generation unit is electrically connected to the direct current signal receiving-processing unit. The radar wave receiving-transmitting unit is electrically connected to the rectification and harmonic generation unit.

Abstract: A satellite provides communication between user terminals (UTs) and ground stations that connect to other networks, such as the Internet. Because the satellite is within range of many UTs at any given time, many UTs are in contention to use an uplink to send upstream data to the satellite. Contention for the uplink may be managed by sending grants that allocate a portion of the uplink time and frequency resources to individual UTs. A UT serviced by the satellite uses information based on the grants to determine whether upstream data from a user device connected the UT should be accepted for future transmission promised to deliver specified quality of service to the user device. Acting as a distributed system, each UT may decide to approve upstream data based on one or more factors, such as source address, destination address, header flags, predicted radio availability, and so forth.

Abstract: A method for aligning an earth station antenna with a satellite antenna includes sending an uplink signal from the earth station antenna to the satellite antenna; measuring at least a strength of the uplink signal received by the satellite antenna; sending by telemetry the measured signal strength to a telemetry station; adjusting the orientation of the earth station antenna in order to maximize the measured signal strength.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine that the UE is operating using a first subscriber identity module (SIM) in a non-standalone mode associated with a first radio access technology (RAT) and a second RAT, and that a second SIM has been activated for the UE. The UE may determine, based at least in part on user input, whether to operate in a multi-SIM mode, where both the first SIM and the second SIM are active, or to operate in a single SIM mode where only the first SIM, and not the second SIM, is active. The UE may selectively deactivate the second SIM based at least in part on determining whether to operate in the multi-SIM mode or the single SIM mode. Numerous other aspects are provided.

Abstract: Various techniques include detecting noise in a network, identifying the type of noise in the network, localizing noise in the network, determining noise scores for network devices, and/or determining likelihoods that particular devices are causing noise and/or are in proximity of a point of entry of noise into the network.

Abstract: The present invention provides a simulation device, etc. in which the computational load for computing behavior of a pedestrian or the like is reduced while suppressing inaccuracy in simulation. This simulation device is provided with a processor configured to: select, based on a position of a moving object model that is a virtual moving object positioned within a virtual map including a plurality of cells, one or more of the plurality of cells, as candidates for a post-movement place of the moving object model; compute, for each candidate of the candidates, a margin level that represents a degree of a margin of the each candidate for newly accepting the moving object model; and determine the post-movement place from among the candidates, based on the margin level and a reference direction associated with the moving object model.

Abstract: A method for determining a maximum transmission power (Pmax, PR, PO) of a non-geostationary satellite (NGSO1, NGSO2) in the direction of a ground station (GSO_SOL), includes the steps of: determining the minimum value of a topocentric angle (?NGSO1, ?NGSO2), formed between the non-geostationary satellite, the ground station and a point of the geostationary arc (ARC_GSO); comparing, in terms of absolute value, the minimum value of the topocentric angle with at least two threshold values (?r, ?o), such that: if it is less than the first threshold (?r), defining the maximum transmission power at a first value (PR), if it is between the first threshold and the second threshold (?o), defining the maximum transmission power at a second value (PO), greater than the first value, or if it is greater than the second threshold, defining the maximum power at a third value (Pmax), greater than the second value; the maximum transmission power values and the thresholds being determined so as to minimize the deviation betwee

Abstract: A multi-mode communication adapter system comprising: a mobile Earth station including: a flat panel antenna configured to receive a down-link satellite packet, wherein the flat panel antenna includes a waveguide interposer, a satellite Rx/Tx, coupled to the flat panel antenna, configured to decode the down-link satellite packet, a storage device, coupled to the satellite Rx/Tx, configured to store satellite data from the down-link satellite packet, a first interface module, coupled to the storage device, configured to encode and transfer the satellite data as a cellular communication packet, a second interface module, coupled to the storage device, configured to encode and transfer the satellite data as a WiFi packet, and a multi-band transceiver, coupled to the first interface module and the second interface module, configured to concurrently transfer the cellular communication packet and the WiFi packet without accessing a local infrastructure; and a protective cover encloses the mobile Earth station.

Abstract: A method for estimating, at one and the same given time, a set of attenuations of one or more first radiofrequency RF uplinks, implemented by a VHTS space telecommunications system. In an auxiliary usage step, an on-board regenerative or digital transparent processor DTP generates at least one beacon signal that is or are distributed, in the Q band, to N nominal access stations GWn(i) in order to be measured in terms of power, or measures the spectral power of each traffic signal transmitted by the nominal access stations GWn(i), i varying from 1 to N. In a following step, the attenuation levels An(i) of the uplinks LUn(i) are determined based on the powers of the one or more beacon signals that are measured on the corresponding downlinks LDn(i) in the Q band, or based on the one or more spectral powers, measured by the DTP, of the traffic signals received on the one or more uplinks LUn(i).

Abstract: A method for an infrastructure equipment of a wireless telecommunications network, the wireless telecommunications network comprising a base station and a non-terrestrial network part, the non-terrestrial network part transmitting one or more beams to provide a wireless access interface for transmitting signals to and receiving signals representing data from a communications device within a coverage region of a cell or a spot beam, the method comprising: determining a location of the communications device, determining the coverage region of the cell or the spot beam, determining a relative motion, relative to the communications device, of the coverage region of the cell or the spot beam, and based on the location and the relative motion, initiating a cell change of the communications device.

Abstract: The present disclosure provides a high power amplifier (HPA) linearization method, applied to a ground hub which includes a predistorter and a PD controller. The ground hub is arranged in a satellite communication system together with a transmitter and a satellite transponder, and the satellite transponder includes an HPA. The HPA linearization method includes determining an initial correction signal based on a physical model with a plurality of PD parameters to compensate AM-AM and AM-PM characteristics of the HPA; receiving a signal from the satellite transponder; determining a reward function for an action taken by the PD controller; examining an action-value function for actions taken in a preset past period; taking an action to adjust the plurality of PD parameters for the PD to generate an updated correction signal; sending the update correction signal to the transmitter to compensate the AM-AM and AM-PM characteristics of the HPA.

Abstract: Systems and methods relating to correction of a Doppler/frequency offset in a wireless communication system are disclosed. In some embodiments, a method of operation of a node comprises estimating a Doppler/frequency offset for a wireless device based on an uplink signal received from the wireless device and providing a frequency adjustment to the wireless device that corrects for the Doppler/frequency offset. In this manner, the Doppler/frequency offset for a wireless device is determined and corrected.

Abstract: Methods and systems are provided for increasing bandwidth efficiency in satellite communications. In some embodiments, a satellite communications method is provided that comprises receiving, at a satellite and from a plurality of user ground terminals, a plurality of source signals, wherein each of the source signals are modulated according to at least one source modulation method, and further receiving, at a satellite and from a plurality of user ground terminals, a plurality of information signals corresponding to the plurality of source signals. The method further includes combining, at the satellite, the plurality of source signals into a combined source signal with an overlapping bandwidth, wherein each of the source signals are further modulated according to at least one predetermined modulation method before they are combined, and transmitting, by a downlink transmission from the satellite to a gateway ground station, the combined source signal.

Abstract: A time transfer modem includes a radio frequency integrated circuit (RFIC), a radio frequency (RF) front end, and processing circuitry. The RF front end is configured to receive and up-convert an input for time transfer with a remote station to generate an up-converted timing signal centered at a select frequency that is outside of a frequency range of interest but within an operational frequency range of the RFIC. The RF front end may also be configured to attenuate, via a pre-selection filter, up-converted adjacent signals to generate a filtered timing signal at the select frequency. The RFIC may be configured to down-convert and digitize the filtered timing signal to generate a digitized timing signal for signal processing by the processing circuitry to determine a clock difference between a local clock signal and the digitized timing signal that originated from the remote station.

Abstract: A system and method for scheduling a variable stayout distance when beam hopping, the method including providing an illumination area of a satellite and candidate beam centers disposed in the illumination area; measuring a respective scan angle from an antenna boresight to a respective beam center of the candidate beam centers; and determining a reuse factor k for each of the candidate beam centers, based on a proportion of the respective scan angle to a maximum scan angle. Each candidate beam center may be processed sequentially. Prior to adding each candidate beam center to a current beam center set, checking whether a candidate beam center meets the stayout distance criteria from all beam centers already in the beam center set.

Abstract: 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.

Abstract: Embodiments of the present disclosure provide methods, apparatuses and computer program products for managing a storage system. The storage system comprises a plurality of cache devices and a bottom storage device, and the plurality of cache devices comprise a first cache device group and a second cache device group. The method according to an aspect of the present disclosure comprises: receiving an input/output (I/O) request for the storage device; in response to determining that the I/O request triggers caching of target data, storing the target data from the storage device into the first cache device group if the I/O request is a read request; and storing the target data into the second cache device group if the I/O request is a write request. Embodiments of the present disclosure introduce a new architecture for cache devices so that the processing delay is shortened, and/or, the storage capacity can be used more effectively.

Abstract: A method and system for installing a terrestrial antenna for a satellite communication network. In the system and method, a remote unit is provided to an installation location for the terrestrial antenna. The remote unit is configured to communicate with a satellite of the satellite communication network and includes a memory in which is stored antenna information pertaining to positioning of the terrestrial antenna with respect to a virtual beam generated by the satellite. The information is accessible by a code. Thus, the antenna information is access from the memory at the installation location using the code, and the terrestrial antenna in relation to a virtual beam generated by the satellite based on the antenna information accessed from the memory at the installation location.

Abstract: A system and method for managing a transmit power of a terminal includes dividing a spectrum into frequency bins and an inroute layout including inroutes; mapping at least one of the frequency bins with each of the inroute; determining a respective normalized Transmit Power (TP) for each of the frequency bins; calculating a transmission TP based on the respective normalized TP of one or more of the frequency bins mapped to a selected inroute; and transmitting a radio signal with the transmission TP on the selected inroute. A first frequency bin is adjacent a second frequency bin, a respective normalized TP of the first frequency bin compared to a respective normalized TP of the second frequency bin varies no more than a threshold power delta, a count of frequency bins is greater than one and unequal to a count of the inroute layout.

Abstract: A handle assembly for an electronic device, such as an audio device, is described herein. In some implementations, the handle assembly includes a flexible fabric, rope handle that attaches at the side and near the top of the device. The attachment assembly utilizes an eyelet that slides onto the rope handle prior to attaching an endpiece to the rope. The endpiece is inserted into a device housing opening that receives the handle attachment assembly. The eyelet is then inserted into that housing opening to secure the eyelet and endpiece into the opening. A sealing member, such as an O-ring, is utilized to secure the eyelet into the opening, and to provide other benefits, such as preventing or reducing acoustic buzz that would otherwise occur between the eyelet and the casing during audio playback.

Abstract: Provided is a communication system including a control station and a satellite repeater capable of forming two or more beams. The control station includes a control unit that classifies the two or more beams into clusters each made up of two or more beams among the two or more beams and allocates different frequencies to the beams belonging to one of the clusters. The satellite repeater includes a channelizer that performs exchanging processing on an input reception signal and outputs the reception signal having undergone the exchanging processing, as a transmission signal. A signal used in the exchanging processing includes a signal obtained by combining signals corresponding to the beams defining the one cluster.

Abstract: A communication system includes a satellite constellation, one or more gateways and a network controller. The satellite constellation includes multiple satellites to facilitate communication between a number of user terminals (UTs). Each gateway communicates with one or more of the satellites. The network controller controls operation of the satellites, the gateways and the UTs. The satellites, the UTs, the gateways and the network controller include hardware that may also be software-defined network (SDN) enabled to ensure a persistent end-to-end data packet forwarding including proactive updates and reactive updates to forwarding tables. The proactive updates handle deterministic and time-synchronized link connectivity changes and the reactive updates handle ad hoc link connectivity changes.

Abstract: A computer implemented system and method for a consumer based access control for identity information. The method and system involve receiving at an identity organization a request for registration and verification of the identity information and configuring a specific user selected policy for notification and authorization of such identity requests of a desired (or intended) identity service (or plurality of services) associated with the targeted user identification. Next, processing the request in a Joint Identity Information Service Network (JIISN) server framework for the detection and verification of a request against an active directory of users or organizations who have opted in for notification; computing the required action based on the configuration of the policies in one of the group consisting of: a JISN policy engine and a user remote mobile control system; communicating with a real time authorization server (e.g.

Abstract: Radio communications systems use 100 to 200 satellites in random low-earth orbits distributed over a predetermined range of north and south latitudes. The satellites themselves create a radio route between ground stations via radio links between multiple satellites by virtue of onboard global navigation satellite system circuitry for determining the location of the satellite and route creation circuitry for calculating in real time the direction from the satellite's location at a particular instant to a destination ground station. Directional antennas in the satellites transmit routing radio signals to enhance the probability of reception by other satellites. One embodiment facilitates the creation of satellite-to-satellite links by assigning each satellite a unique identifier, storing orbital information defining the locations of all of the orbiting satellites in the system at any particular time, and including in the radio signal the unique identifier associated with the transmitting satellite.

Abstract: Systems, methods, and apparatus for a virtual transponder utilizing inband telemetry are disclosed. A disclosed method for a virtual transponder utilizing inband telemetry comprises transmitting, by a hosted payload (HoP) operation center (HOC), encrypted hosted commands to a host spacecraft operations center (SOC). The method further comprises transmitting, by the host SOC, encrypted host commands and encrypted hosted commands to a vehicle. Also, the method comprises reconfiguring a payload on the vehicle according to unencrypted host commands and/or unencrypted hosted commands. In addition, the method comprises transmitting payload data to a host receiving antenna and/or a hosted receiving antenna. Also, the method comprises transmitting encrypted host telemetry to the host SOC. In addition, the method comprises transmitting encrypted hosted telemetry to the hosted receiving antenna. Further, the method comprises transmitting, by the hosted receiving antenna, the encrypted hosted telemetry to the HOC.

Abstract: Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams.

Abstract: An SDN communication system comprising a plurality of White Boxes and a plurality of servers, characterized in that all traffic to/from a plurality of mobile elements, to/from a plurality of broadband communication elements and to/from enterprises, is forwarded after it has been re-arranged based on pre-defined criteria via a single unified cloud, and wherein the unified cloud extends from a plurality of users to a core network, covering a Last Mile network, a Metro network and an Edge network.

Abstract: A satellite system may have a constellation of communications satellites. Satellite terminal equipment may be used to communicate with the satellite constellation. The satellite terminal equipment may have indoor and outdoor equipment that can communicate wirelessly. Power may be conveyed wirelessly between the indoor equipment and the outdoor equipment. The indoor equipment may include communications circuitry for supporting communications with electronic devices. The outdoor equipment may include satellite communications circuitry. The satellite communications circuitry may include antennas, satellite transceiver circuitry, and modems. Wireless communications between the indoor and outdoor equipment may be supported using radio-frequency wireless communications circuits or optical communications circuits.

Abstract: Various systems, methods, for unmanned aerial vehicles (UAV) are disclosed. In one aspect, UAVs operation in an area may be managed and organized by UAV corridors, which can be defined ways for the operation and movement of UAVs. UAV corridors may be supported by infrastructures and/or systems supported UAVs operations. Support infrastructures may include support systems such as resupply stations and landing pads. Support systems may include communication UAVs and/or stations for providing communications and/or other services, such as aerial traffic services, to UAV with limited communication capabilities. Further support systems may include flight management services for guiding UAVs with limited navigation capabilities as well as tracking and/or supporting unknown or malfunctioning UAVs.

Abstract: Provide a system capable of improving a frequency utilization efficiency of a feeder link of an aerial-floating type communication relay apparatus. A system, which has an aerial-staying type communication relay apparatus that wirelessly communicates with a terminal apparatus, is provided with plural gateway stations that perform space-division multiplexing communication for transmitting and receiving different relay signals from each other on a same frequency in a feeder link with the aerial-stay type communication relay apparatus. Each of the plural gateway stations may be provided with an antenna control section that controls an antenna for feeder link so as to track the aerial-stay type communication relay apparatus.

Abstract: Methods and systems are provided for increasing bandwidth efficiency in satellite communications. In some embodiments, a satellite communications method is provided that comprises receiving, at a gateway ground station and as part of a downlink transmission from a satellite, a combined source signal comprising a plurality of source signals with an overlapping bandwidth, and extracting, from the downlink transmission, information specifying at least one predetermined modulation method. The method also includes generating, based on the at least one predetermined modulation method and from the combined source signal, a plurality of estimated waveforms corresponding to the plurality of source signals, separating, by signal cancellation and using the plurality of estimated waveforms, the plurality of source signals from the combined source signal, and routing, with a terrestrial network, the plurality of source signals to one or more user ground terminals.

Abstract: Methods, systems and computer program products for using wireless communication networks to detect GPS spoofing are provided. Aspects include receiving, from each mobile device of a plurality of mobile devices, location data of the mobile device and a list of wireless communication networks indicated as being detected by the mobile device. Aspects also include selecting a test group of mobile devices including a group of at least two mobile devices that are located within a predetermined proximity to a candidate mobile device. Aspects also include determining a degree of similarity of wireless communication network visibility based on a comparison of the lists of wireless communication networks indicated as being detected by the candidate mobile device and the test group of mobile devices. In response to the degree of similarity failing to exceed a predetermined threshold, aspects also include determining that the candidate mobile device is spoofing its location.

Abstract: Methods and systems are described for providing satellite beam handover based on predicted network conditions. In embodiments, a satellite communications system retrieves flight plan data for a plurality of aircraft being provided a network access service, identifies, for each aircraft respective candidate satellite beams of the plurality of satellite beams for providing the network access service, each candidate satellite beam having an associated service timeframe for providing the network access service, obtains, for each of the respective candidate satellite beams, a beam utilization score indicative of predicted beam utilization by the plurality of aircraft over the associated service timeframe, selects satellite beams for providing the network access service of each aircraft of the plurality of aircraft based at least in part on the beam utilization scores, and schedules handover of the network access service for the plurality of aircraft to the selected satellite beams.

Abstract: An apparatus and method for data cap management of users exceeding or violating bandwidth policies in a communication system. A model is created for identifying super heavy users, and trained usage data for all current users of the communication system for a predetermined time interval. Usage patterns of each user are analyzed over a second duration using the trained model in order to identify current super heavy users based, at least in part, on the analysis. Traffic flow control restrictions are then applied to some or all of the traffic associated with identified super heavy users.

Abstract: A communication device includes: a reception antenna having element reception antennas, an element reception signal processor for processing element reception signals and outputting signals received from two directions changeable electronically and independently, a transmission antenna having element transmission antennas, an element transmission signal generator for generating element transmission signals capable of transmitting radio waves in two directions changeable electronically and independently, two modems for modulation and demodulation of transmission and reception signals using two communication lines, and a controller. The communication device operates by switching between a search mode to communicate by tracking a primary satellite and searching a direction at which beacon signals transmitted by satellites are receivable in a search range, and a two-line mode to communicate by tracking the primary satellite and the secondary satellite found in the search mode.

Abstract: A position estimating device includes a processor, and a memory storing program instructions that cause the processor to obtain a plurality of position data of a transmitter, the plurality of position data being output from respective positioning devices, calculate a density of the plurality of position data based on the plurality of obtained position data output from the respective positioning devices, the density of the plurality of position data being a value indicating how close positions indicated by the plurality of position data are, and estimate a position of the transmitter based on the plurality of position data output from the respective positioning devices and the calculated density.

Abstract: Systems and methods for adaptive beamforming for a mobile satellite system (MSS). Embodiments described herein provide individual-user-optimized, adaptive beamforming. One example system creates a user beam optimized based either on known user locations or the waveforms received from all cochannel users. The user beam maximizes the signal-to-interference-noise relative to the desired user, both in the forward and return links. The optimization process considers the spatial distribution of all cochannel users in the footprint of the satellite. The user beam adapts to the user's location and co-channel interference environment.

Abstract: Embodiments provide in-flight configuration of satellite pathways to flexibly service terra-link and cross-link traffic in a constellation of non-processed satellites, for example, to facilitate flexible forward-channel and return-channel capacity in a satellite communications system. For example, each satellite in the constellation can include one or more dynamically configurable pathway, and switching and/or beamforming can be used to configure each pathway to be a forward-channel pathway or a return-channel pathway in each of a number of timeslots according to a pathway configuration schedule. At least some of the pathways can be further selectively configured, in each timeslot, to carry “terra-link” traffic to and/or from terrestrial terminals and “cross-link” traffic to and/or from one or more other satellites of the constellation.

Abstract: Systems, methods, and computer program products are provided for tracking one or more items. In one exemplary embodiment, there is provided a method for tracking one or more items. The method may include periodically detecting, by a sensor device, sensor information of the one or more items, and periodically transmitting, by the sensor device, the sensor information. The method may also include determining if the one or more parties is authorized to receive the sensor information. The method may also include transmitting the sensor information to the one or more authorized parties. The method may further include determining if the one or more parties is authorized to receive the sensor information and the periodically transmitting the sensor information to the one or more authorized parties based on a set of one or more permissions that grants or restricts access of the one or more parties to the sensor information based on the set of one or more permissions.

Abstract: 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.

Abstract: The focus of the present disclosure relates to a constellation of earth-observation satellites communicating with terrestrial access points through an intermediate satellite constellation of networked relay satellites. The network system includes one or more terrestrial access points, one or more earth observation satellites, and a satellite constellation including a plurality of communicatively coupled relay satellites. The earth observation satellites establish links with the relay satellites, which relay the communications from the earth observation satellites to the terrestrial access points. The earth observation satellite can transfer recorded information to one or more of the plurality of relay satellites. The communication from the earth observation satellite may be routed through multiple relay satellite in the network system to reach the terrestrial access point.

Abstract: Methods and systems that provide an interactive media guidance application having a locked mode for viewing media assets. In the locked mode, the interactive media guidance application may provide media assets suited to a certain audience. The interactive media guidance application may determine suitable media assets for the locked mode based on media assets viewed by other users having characteristics similar to the user of the interactive media guidance application. In the locked mode, the interactive media guidance application may allow access to only certain media assets and/or limit the time period for which the media assets are presented.