Abstract: A method, performed by at least one apparatus, is provided that includes obtaining or determining one or more stability parameters for a specific satellite. The method also includes determining, at least partially based on the one or more stability parameters for the specific satellite, one or more transmission characteristics for transmitting correction data for the specific satellite. A corresponding apparatus and a computer readable storage medium are also provided.

Abstract: A ground antenna determines the current time and its own position from received signals that were transmitted by artificial earth satellites for communication. A high-gain multi-beam electrically-steered antenna is combined with a processing system to measure the angles between two or more satellites and determine the present distance to each satellite by the information broadcast on the TT&C channel. The knowledge of the angles and distances, as well as the trajectory of the satellites, can be combined with their locations as predicted by the satellite ephemeris data to triangulate the location of the receiver. This system is different from conventional GPS antennas because it does not require the cooperation of active communication with the satellites to derive a location estimate. The location is computed by the ground terminal, not by the satellite.

Abstract: Embodiments of the invention include a vehicle telematics system including telematics a telematics device, where the telematics device includes a modem that communicates using several communication modes, and the processor of the telematics device is directed to operate in the communication mode, transmit a notification to the cellular data server regarding a switch to a different communication mode, switch to the navigation mode and obtain location data for a first time, switch back to the communication mode, extrapolate a new location for a second time while in the communication mode based on an analysis of the location data received during the navigation mode.

Abstract: A timepiece including a GPS receiver that receives a radio wave from a positioning satellite, a time counter that performs a time count operation, and a processor, the processor being configured to: corrects a time count of the time counter in accordance with time and date information included in the radio wave from the positioning satellite received by the GPS receiver; acquires a temperature in the timepiece; acquires a voltage of a battery; and controls a receive operation at the GPS receiver in accordance with the temperature and the voltage.

Abstract: Disclosed herein are a head-up display (HUD) including a photosensor for measuring the illuminance of incoming light and a light shutter in order to protect an imaging element vulnerable to thermal damage from sunlight reaching from the outside, and a method including setting the HUD protection mode by operating the light shutter, determining whether to release the HUD protection mode by estimating the change in the incident angle of the incoming light from the change in the vehicle orientation angle instead of using the photosensor incapable of measuring the light as the incoming light is blocked and additionally determining whether to release the HUD protection mode based on vehicle information including vehicle location, navigation map information, the brightness of surroundings of the vehicle, and rain sensor detection information.

Abstract: Described herein is an apparatus comprising a location-awareness determination circuit configured to determine a location of the apparatus; at least one processor configured to determine at least one contextual factor of the apparatus including a type identifier of the determined location; an app-management facilitator configured to activate at least one mobile application (“app”) that is associated with the determined location of the apparatus based, at least in part, upon the determined at least one contextual factor; and deactivate at least one of the selected apps on the apparatus when the apparatus exits the location, based on the determined at least one contextual factor of the apparatus.

Abstract: The disclosed technology relates to systems and methods for tasking satellite constellations. A method is disclosed herein for receiving, from a resource database of a satellite control system, knowledge data corresponding to a plurality of components associated with a satellite constellation communications system. The plurality of components can include one or more satellites associated with a constellation. The method includes processing the knowledge data according at least one received mission objective. Processing the knowledge data can include determining a status of at least one satellite in the constellation.

Abstract: A method for determining a period in a vehicle using several time sources.

Abstract: A device for mitigating satellite navigation spoofing includes processing circuitry which detects correlation peaks for PRNs in a satellite navigation signal. The TOAs of subframes of navigation messages associated with each of correlation peaks are recorded and analyzed to determine if they fall within a specified time window. Based on the analysis, the correlation peaks are classified as legitimate or as spoofed. A correct geographic location is computed from the navigation data associated with the legitimate correlation peaks. Corresponding methods for mitigating satellite navigation spoofing may be embodied in a hardware-based GNSS receiver and in a software-based GNSS receiver.

Abstract: A method of determining location of a user device includes receiving global navigation satellite system (GNSS) fix data that represents GNSS calculated position of the user device, receiving signal strength data associated with each satellite communicating with the user device, and receiving satellite data regarding locations of satellites. The method further includes retrieving satellite blocking values from a cache that describe a likelihood of a satellite signal being blocked at a plurality of possible locations. A non-linear filter, implemented by one or more processors, is applied to the GNSS fix data, signal strength data, and satellite blocking values to generate an updated position estimate of the user device.

Abstract: An information notification device which transfers to a communication device a packet transmitted by a terminal to a relay device. The information notification device is provided with: a communication condition providing unit which provides the packet transmitted by the terminal with communication condition information concerning a communication condition between the terminal and the relay device; a data transmission unit which transmits the packet provided with the communication condition information to the communication device; and a supplementation unit which, in the absence of arrival of the packet from the terminal, implements a notification supplementation process for notifying the communication device of the communication condition information.

Abstract: A satellite radiowave receiving device includes a receiver performing a receiving operation of radiowaves transmitted from a positioning satellite and a processor controlling a positioning operation. The processor performs the positioning operation within at least a predetermined maximum positioning interval from a last positioning operation using preliminarily obtained date and time information and valid positional information on the positioning satellite to obtain a current position of the satellite radiowave receiving device and date and time information. The processor causes the receiver to perform the receiving operation within at least a predetermined date and time updating interval shorter than the predetermined maximum positioning interval from a last time when date and time information is obtained from radiowaves transmitted from a positioning satellite to obtain date and time information without the positioning operation.

Abstract: A system and method for clock-skew-based covert communication in which a message formed of message bits is mapped to corresponding symbols having predetermined clock skew values. For each corresponding symbol, an offset value is calculated and added to each timestamp in a predetermined quantity of outgoing TCP segments to generated altered TCP segments, such that an artificial clock skew is induced as measured by a receiver. A clock skew value is determined from each predetermined quantity of TCP segments and mapped to corresponding symbol. The symbols are then mapped to corresponding message bits, and the message is determined from the bits. In this way a message can be sent from a transmitter to a receiver in a way that is covert during transmission and deciphered at the receiver.

Abstract: Provided is a communication control device controlling communication of multiple secondary usage nodes providing second communication services using a part of a frequency band assigned to a first communication service, including a communication unit receiving service area information for estimating service areas of the second communication services provided by the secondary usage nodes and access technique information indicating radio access techniques usable by the secondary usage nodes, a storage unit storing information on the service area and access technique received by the communication unit, an estimation unit estimating service areas of multiple second communication services, and a control unit notifying a secondary usage node providing one of the multiple second communication services of a radio access technique or a channel recommended to the at least one second communication service on the basis of a location relationship between the service areas estimated by the estimation unit and the access tec

Abstract: 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.

Abstract: A communications protocol in accordance with one exemplary embodiment uses information from GPS satellites to synchronize the phases of transmitters, and aligns the phase with a spreading code used to de-spread the received signals at, for example, a ground station.

Abstract: A travel distance calculation device includes: a first travel distance calculation unit configured to calculate a travel distance of a vehicle on the basis of position information on the vehicle obtained through position determination using a GNSS satellite; a second travel distance calculation unit configured to calculate a travel distance of the vehicle on the basis of the number of rotations of a tire that the vehicle includes; and a calculation-means selecting unit configured to select calculation means configured to calculate the travel distance of the vehicle from among the first travel distance calculation unit and the second travel distance calculation unit on the basis of at least one of the position information on the vehicle obtained through position determination using the GNSS satellite and information indicating a state of communication with the GNSS satellite.

Abstract: Techniques are described for providing assistance data corresponding to a plurality of access points (APs). The techniques include, in part, providing assistance data to a mobile device. The assistance data comprises group data that is common among the plurality of APs. The group data is associated with a group identifier (ID). The techniques further include providing the group ID and a set of AP-specific information for at least one of the plurality of APs. The group data may include information corresponding to a common grid, common location area and/or common characteristics of the APs.

Abstract: Methods and systems are described for determining the elevation of tracked personnel or assets (trackees) that can take input from mounted sensors on each trackee (including barometric, inertial, magnetometer, radio frequency ranging and signal strength, light and GPS sensors), external constraints (including ranging constraints, feature constraints, and user corrections), and terrain elevation data. An example implementation of this method for determining elevation of persons on foot is described. But this method is not limited to computing elevation of personnel or to on foot movements.

Abstract: An indication of an incident associated with a vehicle may be received via a communication protocol. The indication of the incident may be received from a mobile device. The indication of the incident may be received by a computing device, such as a computing device comprising a processor and memory coupled to the processor. If the communication protocol comprises a cellular protocol, a coverage area of a network cell in communication with the mobile device may be determined. An assistance service may be dispatched to the coverage area of the network cell. If the communication protocol comprises a wireless protocol, such as a Wi-Fi protocol, a coverage area of a wireless access point in communication with the mobile device may be determined. An assistance service may be dispatched to the coverage area of the access point.

Abstract: In one embodiment, a ground station server of a satellite communication system mitigates congestion on a particular forward communication path via an intermediate satellite from the ground station server to a plurality of distributed modules. In particular, in response to determining that the level of congestion is above a threshold, then the ground station server mitigates the congestion by, e.g.

Abstract: Provided is a communication control device controlling communication of multiple secondary usage nodes providing second communication services using a part of a frequency band assigned to a first communication service, including a communication unit receiving service area information for estimating service areas of the second communication services provided by the secondary usage nodes and access technique information indicating radio access techniques usable by the secondary usage nodes, a storage unit storing information on the service area and access technique received by the communication unit, an estimation unit estimating service areas of multiple second communication services, and a control unit notifying a secondary usage node providing one of the multiple second communication services of a radio access technique or a channel recommended to the at least one second communication service on the basis of a location relationship between the service areas estimated by the estimation unit and the access tec

Abstract: Provided is a communication control device controlling communication of multiple secondary usage nodes providing second communication services using a part of a frequency band assigned to a first communication service, including a communication unit receiving service area information for estimating service areas of the second communication services provided by the secondary usage nodes and access technique information indicating radio access techniques usable by the secondary usage nodes, a storage unit storing information on the service area and access technique received by the communication unit, an estimation unit estimating service areas of multiple second communication services, and a control unit notifying a secondary usage node providing one of the multiple second communication services of a radio access technique or a channel recommended to the at least one second communication service on the basis of a location relationship between the service areas estimated by the estimation unit and the access tec

Abstract: A method of providing position assistance to a UE, the method comprising providing, by a location server, at least one unsolicited message, each message comprising one of data selected from a list comprising GNSS ephemeris assistance data, GNSS acquisition assistance data, OTDOA assistance data and eNB position data for a predefined area.

Abstract: Methods and systems detect physical locations of vessels. A first satellite includes a first image sensor. A second satellite includes a second image sensor. The processor receives a first image of a target area from the first image sensor, and a second image of the target area from the second image sensor. Both images are taken within a predetermined time frame. The processor performs image recognition to identify a vessel that appears in both the first image and the second image. The processor receives the first satellite's location and orientation when the first image is taken and the second satellite's location and orientation when the second image is taken. Each satellite's location and orientation are determined by the satellite's geographic determination module. The processor determines the vessel's location by performing triangulation based on the first satellite's location and orientation and the second satellite's location and orientation.

Abstract: A positioning apparatus includes the following. A first oscillator outputs a clock signal. A second oscillator outputs a clock signal which is more accurate than the first oscillator. A receiver receives a radio wave from a positioning satellite. A positioning controller calculates a present position based on positioning information calculated from the received radio wave. The positioning controller controls switching of a supply source of the clock signal supplied to the receiver and the positioning controller between the first oscillator and the second oscillator depending on a reception status of the radio wave from the positioning satellite by the receiver.

Abstract: A computer system receives a military global navigation satellite system signal and a terrestrial civilian signal comprising augmentation data. The computer system parses the civilian augmentation data and verifies some component of the augmentation data by comparison to verified military augmentation data. A minimum quality factor defines the number of data elements that must be in agreement between the military augmentation data and civilian augmentation data. The civilian augmentation data is then incorporated into the military global navigation satellite system.

Abstract: In one embodiment, a technique is provided for estimating and using an expected error of a position estimate of a WLAN-enabled mobile device produced by a WLAN positioning system. The WLAN-enabled mobile device receives signals transmitted by a plurality of WLAN access points in range of the WLAN-enabled device. The position of the WLAN-enabled device is estimated based on the received signals from the WLAN access points in range of the WLAN-enabled device. An expected error of the position estimate is based on at least one of a spatial spread associated with geographic positions of the WLAN access points, signal coverage areas of the WLAN access points, or a number of the WLAN access points. The expected error is used in providing one or more location-based services to a user of the WLAN-enabled mobile device.

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: The present disclosure is directed to utilities (methods, systems, apparatuses) associated with improving the signal-to-noise ratio of a wireless signal at a receiver. It is known in the art to correlate a received signal with a replica signal generated at the receiver to improve reception. However, the inventors have determined that correlation using a replica signal which is not completely accurate may be detrimental. An improved method of correlation disclosed herein includes identifying data bits which are predictable and performing correlation with respect to those data bits while ignoring data bits which are identified as unpredictable. This method may have particular advantages in the case of receivers having attenuated reception (e.g., indoors) after losing a data connection used for receipt of assistance data.

Abstract: A communications protocol in accordance with one exemplary embodiment uses information from GPS satellites to synchronize the phases of transmitters, and aligns the phase with a spreading code used to de-spread the received signals at, for example, a ground station.

Abstract: Provided is a communication control device controlling communication of multiple secondary usage nodes providing second communication services using a part of a frequency band assigned to a first communication service, including a communication unit receiving service area information for estimating service areas of the second communication services provided by the secondary usage nodes and access technique information indicating radio access techniques usable by the secondary usage nodes, a storage unit storing information on the service area and access technique received by the communication unit, an estimation unit estimating service areas of multiple second communication services, and a control unit notifying a secondary usage node providing one of the multiple second communication services of a radio access technique or a channel recommended to the at least one second communication service on the basis of a location relationship between the service areas estimated by the estimation unit and the access tec

Abstract: A positioning system for a machine is disclosed. The positioning system includes a satellite positioning unit to generate signals indicative of a location of the machine in a worksite and an inertial measurement unit (IMU) to generate signals indicative of a position of the machine. A controller is communicated with the satellite positioning unit and the IMU. The controller determines a first error value associated with a location of the machine based on signals received from the satellite positioning unit. The controller further determines a second error value associated with a location and a position of the machine based on signals received from the satellite positioning unit and signals received from the IMU, respectively. Further, a location of the machine is determined based on signals received from the satellite positioning unit and the IMU if the first error value is less than the second error value.

Abstract: A method for position measurement of a portable electronic device is provided.

Abstract: Disclosed are methods, devices, systems, apparatus, servers, computer-/processor-readable media, and other implementations, including a method, performed at a processor-based wireless mobile device, that includes receiving, by the mobile device, signals that include at least one message comprising antenna information for a first wireless node transmitting the signals, and transmitting, by the mobile device, an information message including the antenna information for the first wireless node to a remote device configured to receive and store antenna data for multiple wireless nodes obtained by one or more wireless devices while visiting respective areas covered by the multiple wireless nodes.

Abstract: Crowd-sourced location data from client devices is processed using enhanced filtering techniques in non-realtime by a centralized server process to improve the accuracy and reliability of georeferenced geodata. At a server computer, enhanced filtering techniques make use of future information to improve georeferencing of the geodata. In some implementations, the server computer can be configured to implement batch processing of raw GNSS data and other crowd-sourced location data (e.g., wireless scan data, inertial sensor data) using, for example, a smoothing filter or batch estimator. Augmentation data (e.g., satellite ephemeris data, clock offset and ionospheric delay) and sensor data independent of client devices can also be used by the server computer to augment the crowd-sourced location data to further improve georeferencing of geodata.

Abstract: Systems and methods of conserving power in a mobile emergency communication device. After placing a telephone call, the calling device communicates information to the call recipient, for example a response center, usable to estimate the remaining talk time of the calling device. The call recipient sends instructions to the calling device to turn off, disable, or suspend certain device capabilities to conserve battery power in the calling device. For example, if it is determined that the device is not moving, a geographical location capability of the device may be turned off to conserve power. Other capabilities may also be turned off, for example a secondary radio transceiver, a display screen or other visual indicator, certain software applications executing on the device, or other capabilities.

Abstract: Disclosed are methods, devices, systems, apparatus, servers, computer-/processor-readable media, and other implementations, including a method, performed at a processor-based device, that includes obtaining antenna information for one or more wireless nodes, and generating based, at least in part, on the antenna information for the one or more wireless nodes, a heatmap representative of values measurable at a plurality of locations from signals transmitted by the one or more wireless nodes.

Abstract: A system including a smartphone or tablet of a visiting user accessing a web site and security system of a visited person, the security system having a secured area with the visited person located at a predetermined location within the secured area, the web site downloading an initial geographical location of the visiting user from the smartphone or tablet of the visiting user, a processor of the web site generating and sending a map to the smartphone or tablet based upon the downloaded initial geographic location of the visiting user and the predetermined location of the visited person, the smartphone or table displaying the generated map on a display of the smartphone or tablet guiding the visiting user from the initial location of the visiting user to the predetermined location of the visited person and the processor of the website dynamically updating the map displayed on the smartphone or tablet.

Abstract: A method for determining an error in the estimation of time taken to cross the ionosphere by a signal along a vertical sight axis associated with a receiver, the vertical sight axis cutting the ionosphere at a point of interest, the vertical sight axis being an axis passing through the receiver and a satellite of interest, comprises: determining at least two points of cutting of the ionosphere by two sight axes between a satellite and at least two ground stations; determining at least one angle formed by segments going from the point of interest to two of the cutting points; and determining the spatial dispersion of the cutting points with respect to the point of interest on the basis of the angle, by finding the difference with a predetermined angle and taking the average of the difference or differences.

Abstract: In a satellite radio-controlled wristwatch, processing ranging from a user's operation through a reception operation to the completion of time adjustment is rapidly accomplished.

Abstract: A system for determining an error in a sensed position of a machine includes a position sensing system, a dead reckoning system, and a controller. The controller is configured to determine a difference between a sensed position and a calculated position determined by dead reckoning. The difference is compared to an error threshold defining a maximum acceptable distance between the sensed position of the machine and the calculated position of the machine and an error signal generated if the difference exceeds the error threshold. A pair of offset dead reckoning processes may be used.

Abstract: A computing device can determine an estimated location of a target computing device based on historical signal readings describing wireless communication signals received from the target computing device. A signal reading can include data such as a signal strength value indicating the received signal strength of the wireless communication signal, a timestamp value and a geographic coordinate value indicating the location of a receiving computing device when the wireless communication signal was received. The signal readings can describe wireless communication signals received from the target computing device by one or more receiving computing devices and received during various times. The computing device can calculate the estimated location of the target computing device by triangulating the location of the target computing device based on the geographic coordinate value and signal strength value of three signal readings selected from the set of signal readings.

Abstract: Techniques are disclosed for determining an absolute location of a mobile device by a server. A relative change in location of a mobile device is computed using local sensors of the mobile device. The relative change in location is transmitted to a location server for estimating, by the location server, an absolute location of the mobile device.

Abstract: Provided is a communication control device controlling communication of multiple secondary usage nodes providing second communication services using a part of a frequency band assigned to a first communication service, including a communication unit receiving service area information for estimating service areas of the second communication services provided by the secondary usage nodes and access technique information indicating radio access techniques usable by the secondary usage nodes, a storage unit storing information on the service area and access technique received by the communication unit, an estimation unit estimating service areas of multiple second communication services, and a control unit notifying a secondary usage node providing one of the multiple second communication services of a radio access technique or a channel recommended to the at least one second communication service on the basis of a location relationship between the service areas estimated by the estimation unit and the access tec

Abstract: The systems and techniques disclosed herein provide the ability to determine locations visited by a user and associate relevant location labels with the locations visited based on contact information. In some examples, a location label can be applied based on a match between a location visited and information stored in a user's contact list. In other examples, a user can efficiently designate a contact and location label to be associated with a location visited. In still other examples, if a location visited by a user is not listed in the user's contact list, but is otherwise known to the system, the location visited can be appropriately labeled and the corresponding contact in the user's contact list can be updated to include the location visited.

Abstract: Provided is a system and method for transmitting a satellite state to a satellite receiver to determine use or non-use of a satellite signal in positioning estimation. A satellite navigation system includes at least one satellite, a satellite control center for controlling the at least one satellite, and a server. The server transmits satellite state information about the at least one satellite identified through the satellite control center to the satellite receiver. The satellite receiver restricts the use of the satellite signal for positioning estimation when the satellite state is identified as erroneous.

Abstract: The present invention provides a message processing method of a gateway, which can improve the reliability of a routing operation of the gateway by changing the moment of message transmission. The message processing method of the gateway includes steps of (a) calculating a time difference between the transmission time of a message transmitted to the gateway and the transmission time of a message routed and transmitted from the gateway, and (b) comparing the transmission period of the message transmitted to the gateway and the transmission period of the message routed and transmitted from the gateway, when the time difference is less than a target value. (c) A message transmission timing offset is calculated according to the compared result between the transmission periods of the messages, and (d) the transmission time of the message transmitted to the gateway is changed and corrected using the message transmission timing offset.

Abstract: The present invention relates to a location information acquiring system developed to be used in professional trunked radio devices, comprising a global location data organization unit (4) wherein the locations of the subscribers can be acquired one after another sending location queries to a plurality of radios at the same time, which makes channel use more efficient, which can perform global location data transmission swiftly, which is in communication with the wireless communication unit (5), and which is adapted such that it will perform location queries to a plurality of subscriber radios (2) at the same time and acquiring the location information of the said radios (2), a global location data transmission unit (8) which is adapted such that it will perform the transmission of location information when it is radio's (2) turn, and a timer (14); and a method comprising the steps of sending, receiving query, and sending location information with timing.

Abstract: Systems and methods of conserving power in a mobile emergency communication device. After placing a telephone call, the calling device communicates information to the call recipient, for example a response center, usable to estimate the remaining talk time of the calling device. The call recipient sends instructions to the calling device to turn off, disable, or suspend certain device capabilities to conserve battery power in the calling device. For example, if it is determined that the device is not moving, a geographical location capability of the device may be turned off to conserve power. Other capabilities may also be turned off, for example a secondary radio transceiver, a display screen or other visual indicator, certain software applications executing on the device, or other capabilities.