Patent application number | Description | Published |
20090291693 | METHOD FOR ESTIMATING POSITION OF MOBILE TERMINAL IN WIRELESS NETWORK - Provided is a method for estimating a position of a mobile terminal in a wireless network. In the method according to the present invention, difference values between squared signal arrival times of base stations are used to estimate the position of the mobile terminal. | 11-26-2009 |
20100039929 | INDOOR WIRELESS POSITIONING SYSTEM AND METHOD - Provided is an indoor wireless positioning system and method including: a signal receiving unit receiving first signals from wireless communication access points and measuring strengths of the received first signals and a position estimating unit estimating a current position by comparing the strengths of the first signals measured by the signal receiving unit with a table recording strengths of second signals predicted by a simulation for indoor space the system is currently positioned. Accordingly, it is possible to rapidly and accurately create a fingerprint database and calculate position information on the terminal in the terminal or the server on the basis of the database information. | 02-18-2010 |
20100040115 | APPARATUS FOR ACQUIRING REFINE CARRIER FREQUENCY BY OPTIMIZING SEARCH AREAS AND METHOD USING THE SAME - A method and apparatus for acquiring a refined carrier frequency by optimizing search areas are provided. The apparatus for acquiring a refined carrier frequency by optimizing search areas includes: a refined signal generation unit using a coarse carrier frequency and a coarse code phase extracted from a digitized signal and obtaining a refined carrier frequency approximated to the carrier frequency of an original signal from which the digitized signal is obtained by conversion; and a refined carrier frequency searching unit setting and providing a search area in which the refined signal acquisition unit can obtain the refined carrier frequency based on the coarse carrier frequency. According to the method and apparatus, as a result of the searching method reducing a search time, acquisition of a refined carrier frequency as well as fast acquisition of a signal is enabled, thereby allowing a precise initial value to be provided to a signal tracking unit. | 02-18-2010 |
20100049439 | APPARATUS FOR INTEGRATED NAVIGATION BASED ON MULTI FILTER FUSION AND METHOD FOR PROVIDING NAVIGATION INFORMATION USING THE SAME - Provided are an integrated navigation apparatus and a method for providing navigation information using the same. The integrated navigation apparatus includes a first filter, a second filter, a mode probability updating unit, a first navigation information calculating unit, a second navigation information calculating unit, a fusion unit and a navigation information fusion unit. | 02-25-2010 |
20100103026 | RADAR TRACKING DEVICE AND METHOD THEREOF - A radar tracking apparatus and method are provided. The radar tracking apparatus includes an α-β tracking filter, wherein the α-β tracking filter includes: a tracking index unit calculating a tracking index for obtaining α and β filter gains of an α-β tracking filter, based on changes in the measurement error covariance of a radar-measured value that occur when the measured value of target is converted from a polar coordinate system to a rectangular coordinate system; and a filter gain update unit calculating the variations of α and β filter gains, based on the partial differential coefficient of the changing rate of the α and β filter gains with respect to the changing rate of the tracking index and the variations of the tracking index, and updating the α and β filter gains. | 04-29-2010 |
20100238048 | APPARATUS AND METHOD FOR GENERATING LOCATION INFORMATION - An apparatus for generating location information transmits an SUPL INIT message for measuring a location to a target terminal so as to position the target terminal. The target terminal transmits an SUPL POS INIT message including RFID tag information to the apparatus. The apparatus determines a positioning method of the target terminal by using RFID tag information, generates the location of the target terminal according to the determined positioning method, and transmits the location to a service user. | 09-23-2010 |
20100265092 | METHOD FOR DETERMINING LOCATION USING ACCESS POINT, AND APPARATUS THEREOF - The present invention relates to a location measuring method using an access point, and an apparatus using the same. According to the present invention, a location of a terminal is estimated by using a signal strength received from an access point installed at a known position in a wireless network, and location of the access point installed at an unknown position is estimated by using a signal strength received from the access point installed in the unknown position and estimated location information of the terminal. In addition, a location of the terminal is finally calculated by using estimated location information of the access point installed at the known position. As described, the location of the terminal is determined by using estimated location information of an AP that is randomly installed by a user (that is, installed at an unknown position), and therefore a location of an AP installed in an area where it is difficult to measure and availability of location measurement can be improved. In addition, a signal strength measurement value, estimation location information of an AP installed at a known position, and estimation location information of an AP installed at an unknown position are used for location information calculation of a terminal, and accordingly, accuracy of the location measure can be improved. | 10-21-2010 |
20100265093 | METHOD OF AUTOMATICALLY GENERATING FINGERPRINT DATABASE FOR AN INDOOR WIRELESS LOCATION - The present invention relates to a method of automatically generating a fingerprint database for indoor wireless location. For this purpose, the present invention provides a method of generating a fingerprint database that determines a method of calculating the strength of signals transmitted from a plurality of access points, calculates the strength of signals at nodes of a plurality of vertical and horizontal grids set in an indoor space, and generates a database table by using the location information about the nodes and the calculated strength of the signals. Further, the present invention provides an environment analysis tool including a communication module that performs communication between at least one of the access points and a receiving terminal, an environment analysis module that calculates the strength of a signal at a specific location by using a method of calculating strength and generates a fingerprint database table, and a fingerprint database that stores the fingerprint database table. According to the present invention, it is possible to reduce time and manpower required to build a fingerprint database, and to easily build a new fingerprint database even though an indoor structure is changed. | 10-21-2010 |
20120122475 | METHOD AND APPARATUS FOR ESTIMATING POSITION OF ACCESS POINT IN WI-FI SYSTEM - A method and apparatus for estimating a position of an access point (AP) in a Wi-Fi system is provided. The method includes measuring a strength of a signal, transmitted by the AP, at three or more measurement points (MPs), selecting an imaginary attenuation factor, calculating a range between the AP and each of the MPs on the basis of the imaginary attenuation factor and a strength of a signal measured at the MP, calculating an intersecting point of ranging circles in each of which a position of the MP is a center and the range between the MP and the AP is a radius, calculating a best intersecting point from among a plurality of the intersecting points obtained by repeating the calculating the range and the calculating the intersecting point of ranging circles while changing the imaginary attenuation factor, and estimating the best intersecting point as the position of the AP. | 05-17-2012 |
20120150434 | METHOD FOR PROVIDING LOCATION SERVICE AND MOBILE TERMINAL - A method for providing a location service and a mobile terminal are provided. The location service providing method includes determining a positioning method based on location information of the mobile terminal and measurement information used for calculating the location of the mobile terminal, determining a map switch indicator by using at least one of the determined positioning method, the location information, and the measurement information, selecting a global map (i.e., the whole area map) or a local map according to the determined map switch indicator, and indicating the location of the mobile terminal on the selected map. | 06-14-2012 |
20130150090 | APPARATUS AND METHOD FOR PROVIDING LOCATION-BASED SERVICE - Disclosed herein are an apparatus and method for providing a location-based service. The apparatus includes a location-based service server and a wireless communication infrastructure location DB. When a mobile payment service is performed for a member store terminal using a user mobile terminal, the location-based service server receives measurement information about a wireless communication infrastructure and information about the location of the member store from the mobile terminal, and generates information about the location of the wireless communication infrastructure using the received measurement information about the wireless communication infrastructure and the information about the location of the member store. The wireless communication infrastructure location DB stores the generated information about the location of the wireless communication infrastructure. | 06-13-2013 |
20130197799 | APPARATUS AND METHOD FOR DETERMINING INDOOR COLLECTION POINTS AND COLLECTING HETEROGENEOUS INFRASTRUCTURE MEASUREMENT INFORMATION - Disclosed herein is an apparatus and method for determining indoor collection points and collecting heterogeneous infrastructure measurement information. The apparatus includes a sensor module unit for sensing a motion and a location. An indoor map DB includes attribute information of an indoor space and an indoor map. A collection route generation unit generates a collection route on the indoor map depending on collection conditions. A collection point determination unit determines a collection point from which the heterogeneous infrastructure measurement information is to be collected on the collection route while moving, based on information of the sensor module unit and the indoor map DB. A heterogeneous infrastructure measurement information collection unit collects heterogeneous infrastructure measurement information from the collection point. An information combination unit generates results of collection by combining the collection point with the heterogeneous infrastructure measurement information at the collection point. | 08-01-2013 |
20130273939 | METHOD AND APPARATUS FOR ESTIMATING LOCATION OF PEDESTRIAN USING STEP LENGTH ESTIMATION MODEL PARAMETERS - Disclosed herein is a method and apparatus for estimating the location of a pedestrian using step length estimation model parameters. In the method of estimating a location of a pedestrian according to the present invention, mobile User Equipment (UE) having sensors generates positioning measurement information. The mobile UE requests positioning assistance information from a positioning server. The positioning server generates the positioning assistance information. The positioning server provides the positioning assistance information to the mobile UE. The mobile UE performs location estimation of the pedestrian using the positioning measurement information and the positioning assistance information. | 10-17-2013 |