Abstract: Systems and methods are provided to permit groups of recreational vehicle riders and others the ability to quickly create and join groups without prior knowledge of the contact information of everyone in the group. In one embodiment, groups are joinable based on the proximity information of the prospective member and the current group members.

Abstract: An asphalt finisher includes a tractor, a hopper provided on a front side of the tractor and configured to receive a pavement material, a conveyor configured to supply the pavement material in the hopper to a rear side of the tractor, a screw configured to place and spread the pavement material supplied by the conveyor on a rear side of the tractor, a screed configured to lay and spread the pavement material placed and spread by the screw on a rear side of the screw, and a distance measuring device configured to include a region including a road surface placed and spread by the screed, and a planimetric feature that is used as a reference for a height of the road surface, within a measuring range.

Abstract: Movement information is calculated with high accuracy, without being influenced by the number of GNSS signals receivable by each of a plurality of antennas. A movement information calculating device includes a plurality of antennas, a clock generator, a plurality of GNSS receivers, and an arithmetic logical unit. The plurality of antennas, each receives a GNSS signal. The clock generator generates a clock signal. The plurality of GNSS receivers are connected to the respective antennas, and share the clock signal from the clock generator and calculate GNSS observed values by using the shared clock signal and the GNSS signals, respectively. The arithmetic logical unit calculates movement information including a speed of a movable body based on the GNSS observed values from the plurality of GNSS receivers.

Abstract: Provided are an antenna system and a network device. In an example, the antenna system includes at least one antenna unit and a control apparatus configured to control the at least one antenna unit to rotate, wherein the control apparatus is connected with the at least one antenna unit and an external control device, receives a rotation instruction from the external control device, and controls the at least one antenna unit to rotate to a target angle according to the received rotation instruction.

Abstract: The present disclosure relates to a moving robot system and a method for generating boundary information of the moving robot system that generates boundary information based on actual installation positions of a plurality of transmission devices when the plurality of transmission devices is installed based on map data provided from a web server.

Abstract: A positioning system and method for resilient ephemeris decoding of Global Navigation Satellite System (GNSS) satellite information is provided. The positioning system decodes first ephemeris data of a satellite in a GNSS satellite constellation and estimates a first position of the satellite at a first time-instant. The positioning system further estimates a deviation between the estimated first position and a position where the satellite is expected to be at the first time-instant and determines the estimated deviation to be above a threshold. The positioning system excludes use of the estimated first position in a position fixing operation of the positioning system based on the determination. The positioning system decodes second ephemeris data of the satellite based on the exclusion, estimates a second position of the satellite at a second time-instant, and controls a position filter of the positioning system to use the estimated second position in the position fixing operation.

Abstract: A radar system is described comprising a transceiver configured to cyclically transmit a first radar signal in a field of view and to cyclically receive a second radar signal from the field of view, and a processing unit configured to process the second radar signal to generate a detection track and detect the presence of a target in the field of view from the detection track. The radar system comprises a marker that can be placed in the field of view and is configured to emit a predetermined reflection signal when impinged upon by said first radar signal and send said predetermined reflection signal to the transceiver. The processing unit is further configured to store a predetermined diagnostic trace, and check whether the predetermined diagnostic track is present in the detection track to thereby determine whether the second radar signal contains the predefined reflection signal and, if not, to indicate a malfunction in the radar system.

Abstract: Methods, apparatus, and systems for detecting signals interfering with satellite signaling and determining a location of the interfering source are disclosed. In one example aspect, a method for detecting a signal directed at interfering with satellite signaling includes receiving, by a receiving node, a signal from a signal source, the signal produced by the signal source disguised as a satellite signal; determining an estimated position of the receiving node based on an orbital position of the satellite and a characteristic of the signal; comparing the estimated position of the receiving node with a reference position of the receiving node; determining that the signal source is a spoofing source different than the satellite; and determine a location of the spoofing source in part based on the estimated position.

Abstract: A method of organizing a trajectory of at least one self-driving vehicle including providing the vehicle having a first localization sensor and a second localization sensor, wherein the functionality of the sensors are different; driving the vehicle in a self-driving mode in a lane; determining the localization of the vehicle, using at least one of the first localization sensor and the second localization sensor, with an accuracy of at least 25 cm in order to obtain a first data set; providing a smart infrastructure in proximity to the lane comprising one or more status sensors arranged along the lane; determining a status information of the vehicle by the smart infrastructure, using the one or more status sensors, in order to obtain a second data set, and coordinating the first data set and the second data set to derive a cooperative strategy for organizing the trajectory of the vehicle.

Abstract: The present disclosure describes a self-positioning system, a tracking beacon and a self-positioning method for a vehicle. The self-positioning system is configured to estimate an direction of arrival of a radio wave tracking beacon signal arriving at an antenna array of the vehicle from a non-stationary tracking beacon unit, estimate Euclidian distance between the self-positioning system and the tracking beacon unit by using wireless radio-frequency communication between the self-positioning system and the tracking beacon unit, and determine position data identifying a three-dimensional position of the self-positioning system with respect to tracking beacon unit on the basis of the estimates of the direction of arrival and the Euclidian distance.

Abstract: Techniques for performing multiple simultaneous pose generation for an autonomous vehicle. For instance, a system that navigates the autonomous vehicle can include at least a first component that determines first poses for the autonomous vehicle using at least a first portion of sensor data captured by one or more sensors and a second component that determines second poses for the autonomous vehicle using at least a second portion of the sensor data. The first component may have more computational resources than the second component and determine poses at a different frequency than the second component. The system may generate trajectories for the autonomous vehicle using the first poses when the first component is operating correctly. Additionally, the system may generate trajectories for the autonomous vehicle using the second poses when the first component is not operating correctly.

Abstract: A system includes antennas to receive satellite signals, modems for managing data received from the antennas, and a switching unit for managing the allocation and the transmission of the data from the various antennas to the various modems, the data from any one of the antennas being able to be allocated and transmitted to any one of the modems, the system thus being able to adapt the allocation of the data such that each modem is able to continue to receive data relating to signals transmitted by one and the same satellite upon a change of position of the antennas, thereby making it possible to maintain communication to one or more given satellite communication services.

Abstract: A working vehicle includes a steering device including a steering handle, a vehicle body to travel with either manual steering by the steering handle or automatic steering of the steering handle based on a traveling reference traveling line, and a controller to permit automatic steering based on steering angles of the steering device obtained when the vehicle body travels a predetermined distance while being steered by the manual steering.

Abstract: Provided herein is a system on a vehicle, the system comprising an active Doppler sensor; one or more processors; and a memory storing instructions that, when executed by the one or more processors, causes the system to perform: obtaining a Doppler signature from each of one or more entities; and determining one or more calibration parameters of the active Doppler sensor based on the Doppler signature from at least a portion of the one or more entities.

Abstract: A system includes a receiver mounted on a work machine, and a processor. The receiver receives a signal usable to identify a position of the work machine. The processor acquires a position of the receiver from the signal received by the receiver. The processor acquires a calculated position of a calibration point in the work machine by calculating a position of the calibration point from the position of the receiver. The processor acquires an actual position of the calibration point. The processor generates calibration data usable to calibrate a position of a reference point in the work machine by comparing the actual position with the calculated position of the calibration point.

Abstract: In some embodiments, an apparatus, comprises an unmanned vehicle configured to be disposed with a vehicle and a processor operatively coupled to the unmanned vehicle. The processor is configured to receive a first signal indicating a stop of the vehicle without a user request and a second signal indicating a location of the vehicle. The processor is configured to determine, based on the location of the vehicle, a target location in a pre-defined area surrounding the vehicle. The processor is configured to send a third signal to the unmanned vehicle to instruct the unmanned vehicle to move to the target location to alert other vehicles via a warning regarding occurrence of the stop.

Abstract: A travel control device for a vehicle, includes: a lane information acquisition unit configured to acquire lane information; a steering control unit configured to control steering of the vehicle by executing lane travel control to make the vehicle travel along the lane; and a vehicle speed control unit configured to control a vehicle speed by executing constant speed travel control in which the vehicle is made to travel at a set vehicle speed and/or adaptive cruise control in which the vehicle is made to travel at a speed equal to or lower than the set vehicle speed so as to follow a preceding vehicle. The vehicle speed control unit is configured to control the vehicle speed during a turn of the vehicle by setting a vehicle speed upper limit value, which is set to different values depending on whether the lane travel control is being executed.

Abstract: A method includes receiving one or more images from a camera positioned on a back portion of the vehicle and receiving a driver planned path from a user interface. The driver planned path includes a plurality of waypoints. The method also includes transmitting one or more commands to a drive system causing the vehicle to autonomously maneuver along the driver planned path. The method also includes determining a current vehicle position and an estimated subsequent vehicle position. The method also includes determining a path adjustment from the current vehicle position to the estimated subsequent vehicle position. The method also includes transmitting instructions to the drive system causing the vehicle to autonomously maneuver towards the estimated subsequent vehicle position based on the path adjustment.

Abstract: A sensor system for a vehicle includes a central module and a plurality of sub modules mounted in a frame of the vehicle, the sub modules being independently removable. The sub modules include sensors configured to capture image data and distance data in a vicinity of the vehicle. The central module is connected to each of the plurality of sub modules through a first network including a switching hub. The sub modules are individually connected to an external processor through a second network. The central processor is configured to synchronize the sub modules based on absolute time information through the first network, and the sub modules are configured to output the captured image data and distance data appended with synchronized time information to the external processor by communicating through the second network.

Abstract: Systems and methods for calculating single delta range differences using synthetic clock steering are provided. In certain embodiments, a system includes a first GNSS receiver that provides first delta range measurements and first measurement times associated with a plurality of GNSS satellites. The system further includes a second GNSS receiver that provides second delta range measurements and second measurement times associated with the plurality of GNSS satellites. Additionally, the system includes a processing unit that executes instructions that cause the processing unit to synchronize the second delta range measurements with the first delta range measurements to create synchronized delta range measurements. The executable instructions also cause the processing unit to calculate a single difference of the first delta range measurements and the synchronized delta range measurements for at least one satellite in the plurality of GNSS satellites.

Abstract: The present disclosure provides methods for adjusting steering angle and articulation angle in an auto articulation operation of a work vehicle. The percentage of travel of a steering joystick of the work vehicle at least partially determines a steering desired angle change, which can be used to calculate a steering desired angle and an articulation desired angle change. The difference between the steering desired angle and a steering angle detected by a steering angle sensor is used to adjust the steering angle. The articulation desired angle change can be used to calculate an articulation desired angle. The difference between the articulation desired angle and an articulation angle detected by an articulation angle sensor is used to adjust the articulation angle.

Abstract: A system for determining a position of a receiver from as few as two or three transmitters. The receiver may be stationary or moving with a known velocity. The system includes a receiver clock having a clock bias and a clock drift relative to a reference clock and may also include a motion sensor. A decoder receives transmitted signals from a number of transmitters and determine pseudo-ranges and transmitter frequencies therefrom and a processing unit receives the pseudo-ranges, the transmitter frequencies and the receiver velocity and determines the position of the receiver therefrom. When only two transmitters are available, the position of the receiver is determined dependent upon a known receiver clock drift. The system may also determine clock bias and, when three or more transmitters are available, receiver clock drift. The processing unit uses ranging and Doppler equations in combination, and may also use a measured velocity.

Abstract: A method for using global positioning system (GPS) repeaters to obfuscate a location of a mobile device operating in an area of a communications network, the communication network including a monitoring system, includes receiving an indication that the mobile device enters the communications network; requesting a GPS location from the mobile device; receiving repeated GPS information from the mobile device; calculating a obfuscated location of the mobile device; mapping the obfuscated location of the mobile device to a table of defined locations to produce an actual mobile device location; and reporting the actual location of the mobile device.

Abstract: Global positioning system (GPS) receivers, along with a user device with a camera, can be used to determine an elevation of a point of interest on or within a structure. The user device and a first GPS receiver can be located somewhere outside the structure from which the structure is clearly visible. A second GPS receiver can be located on, within, or near the structure. The user device receives location data from both GPS receivers and calculates a distance between the two. The user device then takes a digital photograph in which structure is visible and notes the photo capture angle. The user device then calculates the elevation of the point of interest trigonometrically using the calculated GPS distance and the photo angle. The user device can then automatically insert this information into associated documentation and transmit the same.

Abstract: A method and system for detecting signal spoofing are disclosed. According to certain embodiments, the spoofing detection method may include receiving one or more position signals indicative of a first position of a vehicle at a first time. The method may also include receiving one or more reference signals indicative of a second position of the vehicle at the first time. The method may also include determining a difference between the first position and the second position. The method may also include determining that the difference is above a predetermined tolerance. The method may further include notifying the vehicle positioning system.

Abstract: An implement includes a global positioning system (GPS) receiver and an implement control system. The global positioning system receiver is configured to obtain position information for the implement. The implement control system is configured to determine a lateral error for the implement based on the position information, estimate a lateral error for a vehicle relative to the implement, the vehicle being attached to the implement, and steer the vehicle to guide the implement based on at least the lateral error for the implement and the lateral error for the vehicle.

Abstract: Disclosed is a technique to estimate at least a portion of an attitude, such as an azimuth angle from true North, based on beam angles from a controlled reception pattern antenna (CRPA) to space vehicle locations. Other attitude information such as roll and/or pitch can also be estimated. The at least portion of the attitude can be provided with or without an additional sensor, such as a compass or magnetometer, an inertial measurement unit (IMU), or the like. An attitude estimate can be useful because oftentimes the attitude of an object can vary from its track or velocity direction.

Abstract: Systems, apparatuses, methods, and software are described herein that provide enhanced satellite communication nodes. In one example, a parent communication node is configured to establish a satellite edge network over at least a satellite communication pathway with a child communication node remotely located from a geographic location of the parent node. The child communication node is configured to communicate over at least the satellite communication pathway to establish a connection to the satellite edge network and route communications of a local communication interface to the satellite edge network.

Abstract: A method and corresponding device for detecting correction information for an antenna for receiving data of a satellite of a satellite navigation system includes the steps of determining first distance information of the antenna relative to a satellite of a satellite navigation system, capturing position information and orientation information of the antenna on the basis of sensor information, determining second distance information of the antenna relative to the satellite on the basis of the position information captured using sensor information, detecting a deviation of the first distance information from the second distance information, determining correction information on the basis of the detected deviation, and storing, in a data memory, the correction information regarding the orientation information captured by the sensor information. The correction information can be used in particular for correcting an angle-dependent phase center offset.

Abstract: Embodiments of the present invention provide a traffic service obtaining method comprises: receiving a registration request sent by a first vehicle; allocating a temporary identifier to the first vehicle based on the registration request, where the temporary identifier is used to identify the first vehicle in coverage of a transport system; receiving a request message that is sent by a second vehicle and that is used to request a target traffic service; determining a first vehicle related to the target traffic service, and determining, based on a table of a correspondence, target status information required for the target traffic service; obtaining the target status information from the first vehicle, where the target status information carries the temporary identifier; and sending the target status information to the second vehicle, where the target status information is used to provide the second vehicle with the target traffic service.

Abstract: The invention relates to a navigation system for a motor vehicle for ascertaining a navigation position, having: a plurality of receivers for receiving respective position data of a plurality of different navigation satellite systems, an inertial measuring unit for ascertaining an inertial position of the navigation system, a receiving unit for receiving correction data, an additional receiving unit for receiving certified position data, a device which is coupled to the plurality of receivers, the inertial measuring unit, the receiving unit, and the additional receiving unit so as to transmit signals, wherein the device is designed to ascertain the navigation position on the basis of the position data, the inertial position, the correction data, and the certified position data. The invention additionally relates to a method which can be carried out by the navigation device in particular.

Abstract: A process described herein may be used to determine a first asset's position in a GNSS-limited environment. The process includes transmitting a current position for each of at least three additional assets in wireless messages by wireless transmitters. The current position for each of the at least three additional assets is determined using previously received position data and one more additional measurement generated by instruments on board the additional assets. The transmitted messages are received at a device of the first asset and a processor on the device implements pre-programmed instructions to access the current position for each of the three additional assets and determine the first asset's position using the current position for each of the three additional assets.

Abstract: Systems and methods for sharing convergence data between GNSS receivers are disclosed. Convergence data received at a GNSS receiver via a communication connection may be utilized to determine a position of the GNSS receiver.

Abstract: In this vehicle control device, a low-level short-term trajectory generating unit generates a short-term trajectory by using the newest dynamic external environment recognition information while also using the same static external environment recognition information (lane shape information, or the like) as the static external environment recognition information used by a high-level medium-term trajectory generating unit. Performing such control prevents inconsistency between the external environment information (environmental information) used by the low-level short-term trajectory generating unit and that used for a medium-term trajectory, which is a high-level trajectory, and makes stable trajectory output possible.

Abstract: A machine control system includes an agricultural work machine having an ECU coupled via a system bus to control engine functions, a GPS receiver, data collector, and specialized guidance system including a stored program. The data collector captures agricultural geospatial data including location data for the work machine and data from the ECU, and executes the stored program to: (a) capture geometries of the farm; (b) capture agricultural geospatial data; (c) automatically classify the agricultural geospatial data using the geometries of the farm, into activity/event categories including operational, travel, and ancillary events; (d) aggregate the classified data to create geospatial data events; (e) match the geospatial data events to a model to generate matched events; (f) use the matched events to generate actionable information for the working machine in real time or near real-time; and (g) send operational directives to the agricultural work machine based on the actionable information.

Abstract: A system for determining the number of remote vehicles following a host vehicle includes a receiver and an electronic controller. The receiver receives information related to a plurality of remote vehicles, including, for each remote vehicle, a vehicle location and a vehicle travel path. The electronic controller determines a location and a travel path of the host vehicle, compares the location of the host vehicle with the vehicle location of each of the remote vehicles, compares the travel path of the host vehicle with the vehicle travel path of each of the remote vehicles, and causes the host vehicle to perform a mitigation operation when the electronic controller determines that a predetermined number of the remote vehicles are disposed behind the host vehicle, and the travel path of the host vehicle and the vehicle travel path of each of the predetermined number of the remote vehicles is the same.

Abstract: A positioning device includes a satellite positioning unit, an autonomous positioning unit and an error estimation unit. The satellite positioning unit acquires a position of a moving object determined by satellite navigation based on navigation signals. The autonomous positioning unit estimates a movement trajectory of the moving object based on satellite information, which is information before the position of the moving object is calculated in the satellite navigation and detection values of behavior detection sensors, and estimates the position of the moving object based on a reference point and the movement trajectory of the moving object.

Abstract: In the present invention, automated driving control of a vehicle during automated driving is fundamentally performed by referring to a medium-term trajectory which is generated in a medium period having a relatively long computation period and in which emphasis is placed on the smoothness of driving behavior changes. As an exception, in cases in which reference-excluding conditions are matched, the medium-term trajectory is ignored, and automated driving control of the vehicle is performed using only a short-term trajectory generated in a short period having a shorter computation period than the medium period. Thus, a vehicle control device is provided which ensures adaptability without diminishing responsiveness.

Abstract: Devices, methods, and systems for uplink synchronization in time division multiple access (TDMA) satellite network. In one embodiment, an earth-based satellite terminal is configured to communicate with a satellite hub through a satellite using the TDMA communication protocol. The earth-based satellite terminal is configured to determine its own location, a location of the satellite, estimate a distance between the location of the terminal and the location of the satellite, determine a Coarse Timing Advance based on the distance that is estimated, and transmit data to the satellite based on the Coarse Timing Advance and the TDMA communication protocol. The Coarse Timing Advance may allow uplink TDMA communication without a preamble transmission on a random access channel, the preamble transmission being required in many conventional systems.

Abstract: A dynamic baseline position domain monitoring system based on satellite navigation and inertial navigation is used to perform a method, including: a) determining a coordinate system and a transformation matrix; b) calculating a theoretical coordinate value of an antenna baseline vector in a earth-centered earth-fixed coordinate system during the movement of a base station carrier; c) determining the number of antenna baseline vectors to be monitored; d) solving the measurement values of the antenna baseline vectors; e) calculating the position domain error of an antenna baseline vector change rate in three directions of x, y and z at epoch k, and normalizing the position domain errors to obtain a normalized value of the position domain errors; f) obtaining the a cumulative sum; g) comparing the cumulative sum with an error monitoring threshold value, and issuing an integrity risk alarm.

Abstract: A positioning system includes a base station and a tracking device. The base station is configured to receive an estimated location of the base station at a receiver coupled to the base station and determine a correction measurement based on the estimated location of the base station and a known location of the base station. The tracking device is configured to obtain an estimated location of a target object, receive an estimated location of the tracking device at a receiver coupled to the tracking device, determine a relative position between the target object and the tracking device based on the estimated location of the target object, the estimated location of the tracking device, and the correction measurement, and control a movement of the tracking device according to the relative position.

Abstract: An autonomous system includes a processing device programmed to receive, from an image capture device, an image of an environment of the host vehicle; detect an obstacle in the environment, based on an analysis of the image; monitor a driver input to at least one of a throttle control, a brake control, or a steering control associated with the host vehicle; determine whether the driver input results in the host vehicle navigating within a proximity buffer relative to the obstacle; allow the driver input to cause a corresponding change in one or more host vehicle motion control systems, if the processing device determines that the driver input would not result in the host vehicle navigating within the proximity buffer relative to the obstacle; and prevent the driver input to cause the change if the driver input results in the host vehicle navigating within the proximity buffer relative to the obstacle.

Abstract: A Global Navigation Satellite System (GNSS) receiver at a client device receives first correction data from a first correction system that includes, but is not limited to, a first orbit correction value, a first clock correction value, and a first code or phase bias correction value. The GNSS receiver also receives second correction data from a second correction system that includes, but is not limited to, a second orbit correction value, a second clock correction value, a second code or phase bias correction value, and an atmospheric correction value. The GNSS receiver determines a difference between a sum of the first correction data and a sum of the second correction data to calculate a difference value that is utilized to adjust the atmospheric correction value received from the second correction system. The adjusted correction value may be utilized with the first correction data to determine position while mitigating errors.

Abstract: Systems, methods, devices and computer-readable storage mediums are disclosed for device state estimation with body-fixed assumption. In some implementations, a method comprises: determining, by a device, a rotational velocity of a user of the device based on a sensor signal; determining, by the device, user speed; determining, by the device, user acceleration based on the user speed and the rotational velocity of the user; and updating a user state estimator based on the user acceleration.

Abstract: Embodiments relate to a location server, a wireless device and methods performed therein for positioning the wireless device. The wireless device (120) is arranged to perform measurements associated to estimating the position of the wireless device (120), wherein the wireless device (120) is configured to: perform a code phase measurement on a satellite signal between a satellite and the wireless device (120), wherein the code phase measurement indicates a number of cycles of a code phase of the satellite signal, the number comprising a first integer part and a first fractional part; perform a carrier phase measurement on the first fractional part; and send to a location server (130) a report of the code phase measurement and the carrier phase measurement, for estimating the position of the wireless device (120).

Abstract: A computer-implemented method for communication includes obtaining power data associated with a plurality of channels of a frequency band, predicting an error rate for each of the plurality of channels based at least in part on the power data, and selecting a hopset of channels for frequency hopping from the plurality of channels based at least in part on the predicted error rates for the plurality of channels.

Abstract: A system for navigating a host vehicle may: receive, from an image capture device, an image representative of an environment of the host vehicle; determine a navigational action for accomplishing a navigational goal of the host vehicle; analyze the image to identify a target vehicle in the environment of the host vehicle; determine a next-state distance between the host vehicle and the target vehicle that would result if the navigational action was taken; determine a maximum braking capability of the host vehicle, a maximum acceleration capability of the host vehicle, and a speed of the host vehicle; determine a stopping distance for the host vehicle; determine a speed of the target vehicle and assume a maximum braking capability of the target vehicle; and implement the navigational action if the stopping distance for the host vehicle is less than the next-state distance summed together with a target vehicle travel distance.

Abstract: A dead-reckoning guidance system determines a vehicle-speed of the host-vehicle based on wheel-signals from the one or more wheel-sensors; determines a distance-traveled by the host-vehicle during a time-interval since prior-coordinates of the host-vehicle were determined; determines a heading-traveled of the host-vehicle during the time-interval since the prior-coordinates of the host-vehicle were determined; determines present-coordinates of the host-vehicle based on the distance-traveled and the heading-traveled; determines when the vehicle-speed is greater than a speed-threshold; determines when the heading-traveled differs from a cardinal-direction by both greater than a noise-threshold and less than an angle-threshold; and in response to a determination that both the vehicle-speed is greater than the speed-threshold and that the heading-traveled differs from the cardinal-direction by both greater than the noise-threshold and less than the angle-threshold, determines a coordinate-correction to apply to t

Abstract: A reinforcement information adjustment unit reduces an amount of information in reinforcement information by combining: update cycle adjustment processing to set an update cycle of the reinforcement information to be an integer multiple of a predetermined update cycle; geographic interval error value adjustment processing to reduce the number of geographic interval error values by selecting from among a plurality of the geographic interval error values each of which is an error at every predetermined geographic interval out of a plurality of error values, a geographic interval error value at every geographic interval that is an integer multiple of the predetermined geographic interval; and bit count adjustment processing to reduce a bit count of the error value for each error value. A reinforcement information output unit outputs, to an output destination, reinforcement information after being reduced in the amount of information by the reinforcement information adjustment unit.

Abstract: A system and method to determine a location of a device in a wireless local area network (LAN) based on positioning assistance data acquired from a server is disclosed. The host-offload wireless LAN device may determine a location based on the location computations done inside the wireless LAN module. The device includes a storage medium configured to provide a database of positioning assistance data, a wireless LAN module configured to receive beacon signals broadcast from one or more access points, and a processor configured to store the access point identification information and the signal strength detected by the wireless LAN module in a first memory section, access the previously-stored positioning assistance data from the storage medium, assemble positioning assistance data based on a comparison, store the assembled positioning assistance data in a second memory section, and determine a location of wireless LAN device using assembled positioning assistance data.