Patent application number | Description | Published |
20130165150 | METHOD FOR MEASURING POSITION USING A POSITIONING ACCESS POINT, AND DEVICE, SYSTEM, AND ACCESS POINT FOR SAME - The present disclosure provides in some aspects a method for positioning by a positioning access point, and an apparatus, system and access point for the same. A positioning system includes an AP including a positioning AP for delivering a positioning WLAN signal containing a dedicated positioning information and a telecom AP for delivering a telecom WLAN signal; database for storing an identification information of the access point and a location information belonging to the AP and matching the identification information; terminal for communicating with the AP; and WLAN-based positioning server responsive to a positioning request from the terminal for comparing a parameter of a WLAN signal received from the terminal with an identification information of the positioning AP on a priority basis, and when there is a match of information, granting the location information of the relevant access point the highest priority to determine the location of the terminal. | 06-27-2013 |
20130170382 | METHOD AND DEVICE FOR UPDATING A DATABASE FOR WIRELESS LAN BASED POSITIONING - An apparatus for updating a database for wireless LAN based positioning includes a database for storing grid cells divided by pCell ID and base station-derived environment information and wireless LAN environment information matched to the grid cells; a grid cell determining unit for determining an information-unmeasured grid cell among the grid cells, the information-unmeasured grid cell being a grid cell that has unmeasured information among parameters of the wireless LAN environment information matched to the grid cells; an unmeasured parameter checking unit for checking an unmeasured parameter in the information-unmeasured grid cell; a radiowave environment estimating unit for generating radiowave environment estimation information by estimating the unmeasured information based on the unmeasured parameter checked; and a database updating unit for reflecting the radiowave environment estimation information in the information-unmeasured grid cell determined. | 07-04-2013 |
20130170383 | METHOD AND DEVICE FOR ESTIMATING AP POSITION USING A MAP OF A WIRELESS LAN RADIO ENVIRONMENT - The present disclosure concerns a method and apparatus for estimating AP position using WLAN radiowave environment map. An embodiment includes filter for generating filtering radiowave map with data selected exclusively for having common MAC address from collected WLAN radiowave environment maps; grid-cell divisor for generating grid radiowave map with arbitrary grid cells from dividing the filtering radiowave map; representative-coordinate mapper for calculating centroid of each of grid cells constituting grid radiowave map and mapping each centroid as representative coordinate to each grid cell; representative-signal-strength mapper for calculating representative signal strengths based on data in grid cell and mapping each representative signal strength to grid cell; weight-value sorter for sorting out weight value corresponding to a range covering representative signal strength as received; and position estimator for estimating positional information of APs having common MAC address based on one or more of representative coordinate, representative signal strength, and weight value. | 07-04-2013 |
20130170484 | METHOD AND DEVICE FOR DISCRIMINATING POSITIONING ERROR USING WIRELESS LAN SIGNAL - Apparatus for determining a positioning error includes: database for storing grid cells separated by each pCell ID and WLAN environment information matched to grid cells; information receiving unit for receiving terminal WLAN environment information from mobile communication terminal; identification information checking unit for checking AP identification information included in terminal WLAN environment information; triangulating unit for calculating triangulation coordinate value by performing triangulation with AP position estimation information corresponding to AP identification information; grid cell positioning unit for selecting one or more grid cells corresponding to AP identification information and calculating grid cell coordinate value based on coordinate value corresponding to grid cell selected; and error determining unit for comparing triangulation coordinate value and grid cell coordinate value and determining whether there is positioning error in any one of triangulation coordinate value and grid cell coordinate value. | 07-04-2013 |
20130172010 | METHOD FOR GENERATING IN-BUILDING PROPAGATION ENVIRONMENT MAPS AND DEVICE THEREFOR - An apparatus for generating in-building radiowave environment maps, includes: an in-building map providing unit configured to provide in-building map data to a radiowave measurement device; a reference point setting unit configured to interwork with the radiowave measurement device and set up a reference point of specific area in the in-building map data; a location estimating unit configured to estimate a mobile location of the radiowave measurement device by using motion sensor information received from the radiowave measurement device; a radiowave environment collecting unit configured to collect radiowave environment information from the radiowave measurement device; and an in-building radiowave environment mapping unit configured to generate an in-building radiowave environment map by storing the radiowave environment information onto the in-building map data matchingly with every piece of location estimation information on the mobile location estimated based on the reference point. | 07-04-2013 |
20130177006 | LOCATION AND STATE INFORMATION PROVIDING/INQUIRING SYSTEM USING NEAR FIELD COMMUNICATION, LOG INFORMATION PROVIDING/INQUIRING SYSTEM AND METHOD, SERVICE SERVER AND CUSTOMER TERMINAL, LOCATION AND STATE PROVIDING/INQUIRING METHOD - A location and state information providing/inquiring system using WLAN/WPAN communication, log information providing/inquiring system, service server, customer terminal, location and state information providing/inquiring method, and log information providing/inquiring method are disclosed. System for providing/inquiring location and state information by using WLAN/WPAN communication includes: mobile terminal including WLAN/WPAN communication module for acquiring and transmitting identification information of one or more WLAN/WPAN communication modules of one or more adjacent other terminals; service server for storing identification information of subscriber terminals, receiving identification information of WLAN/WPAN communication modules from mobile terminal, and transmitting list of service subscribers; and positioning server for positioning subscriber terminals of service subscribers, and if one or more service subscribers are selected by mobile terminal based on list received from service server, transmitting location and state information of terminals corresponding to service subscribers selected to mobile terminal. | 07-11-2013 |
20130188508 | POSITIONING DEVICE OF MOBILE COMMUNICATION TERMINAL, METHOD FOR CONSTRUCTING WIRELESS LAN INFORMATION OF DEVICE, POSITIONING SERVER OF MOBILE COMMUNICATION TERMINAL, AND METHOD FOR DRIVING SERVER - Embodiments of the disclosure concern a mobile terminal positioning apparatus, method for establishing wireless LAN information of the apparatus, mobile terminal positioning server, and method for operating the server wherein mobility of access point is determined by using positioning information provided at the request of mobile terminal positioning, updating wireless LAN information in wireless LAN server based on stationary access point to make it available to providing mobile terminal positioning service. Exemplary positioning apparatus includes access point for performing local wireless communications; node information-based server for managing wireless environment information of a node in charge of the mobile terminal communications; wireless LAN server; positioning server for calculating distance between the access point and node or between access point and mobile terminal, and if a certain distance is exceeded, determining the access point to be transportable and deletable, and providing the positioning result on stationary access point basis. | 07-25-2013 |
Patent application number | Description | Published |
20130028248 | DATABASE UPDATE METHOD AND APPARATUS FOR LOCATING A pCell - Embodiments of the present invention relate to a database update method and apparatus for locating a pCell. An embodiment of the present invention provides a database update apparatus for locating a pCell, comprising: a database storing grid cells that are sorted by pCell ID; a DB collection unit collecting log data for a WLAN signal from a mobile communication terminal which performs communication using the WLAN signal; an information extraction unit extracting a WLAN parameter from the log data of the WLAN signal; and a DB update unit updating the grid cells by matching and storing the information based on the extracted WLAN parameter in the corresponding grid cell. According to one embodiment of the present invention, the data-based information for AP locations and its application to the determination of a location can enhance the location performance. | 01-31-2013 |
20130235749 | METHOD DEVICE AND SYSTEM FOR ESTIMATING ACCESS POINTS USING LOG DATA - The present disclosure provides a system, device and method for estimating an AP location using log data. Information, which is not pre-stored in a database when the information is updated, is classified and then location information of an AP is estimated by using log data of a user in such a manner of estimating a location of the AP by using log data of a user in wireless LAN based positioning and thus updating the database for the wireless LAN based positioning, thereby improving positioning accuracy. | 09-12-2013 |
20130235863 | APPARATUS AND METHOD OF MANAGING PERIPHERAL WIRELESS LAN RADIO SIGNAL FOR POSITIONING SERVICE - The present disclosure relates to providing a positioning service by managing a plurality of peripheral wireless LAN signals. The positioning service system collects peripheral wireless LAN radio signals by scanning peripheral access points (APs), stores AP information of each of peripheral wireless LAN radio signals in each lattice cell of a database. When a positioning request signal is received from a terminal, a positioning server of the positioning service extracts AP identification information from included in the peripheral wireless LAN radio signal received from the terminal. By using the extracted AP identification information, the positioning server selects from the database the corresponding lattice cell matching to the stored AP identification information of each of the peripheral wireless LAN radio signals pre-stored. And the positioning server estimates location information of the selected corresponding lattice cell as location information for the terminal. | 09-12-2013 |
20150223188 | LOCATION AND STATE INFORMATION PROVIDING/INQUIRING SYSTEM USING WLAN/WPAN COMMUNICATION, LOG INFORMATION PROVIDING/INQUIRING SYSTEM AND METHOD, SERVICE SERVER AND CUSTOMER TERMINAL, LOCATION AND STATE PROVIDING/INQUIRING METHOD - A mobile terminal device for positioning, includes: a wireless local area network (WLAN)/wireless personal area network (WPAN) communication unit to acquire identification information of one or more WLAN/WPAN communication modules of one or more adjacent other terminal devices; a request unit to transmit the identification information of the WLAN/WPAN communication modules to a service server to inquire about service subscription/unsubscription and request location and state information of the adjacent other terminal devices that are service subscribers; and a user interface unit to receive location and state information of the adjacent other terminal devices from the service server and display the location and state information on a screen. | 08-06-2015 |
Patent application number | Description | Published |
20110086948 | NYLON-4 COMPOSITE - The present invention provides a nylon-4 composite containing a nylon-4 resin as a base material, a natural fiber material, and a maleic anhydride graft poly(ethylene-octene) copolymer resin. The nylon-4 composite of the present invention has high heat resistance and impact resistance to provide mechanical properties equivalent or superior to those of the engineering plastics synthesized from petroleum resources. As a result, the nylon-4 composite of the present invention has as excellent properties as the engineering plastics and is an environment-friendly material, thus being useful to make various industrial components including vehicle engine and chassis components. | 04-14-2011 |
20110190437 | POLYLACTIC ACID COMPOSITES - The present invention features polylactic acid composite compositions, more particularly a composite composition. The provided polylactic acid composite composition preferably includes the biomaterial polylactic acid resin and, accordingly, it is capable of effectively reducing carbon dioxide emission. Hence, it goes along with the low-carbon, green growth initiative. Further, with improved mechanical strength and heat resistance, it is usefully applicable to automotive interiors/exteriors, construction interiors, etc. | 08-04-2011 |
20110190448 | POLYPROPYLENE-POLYLACTIC ACID COMPOSITES - Disclosed is a polypropylene-polylactic acid composite composition, in which a maleic anhydride grafted ethylene-octene copolymer is included as a compatiblilizer. Since the provided polylactic acid composite composition includes the biomaterial polylactic acid resin, it is capable of effectively reducing carbon dioxide emission. Hence, it goes along with the low-carbon, green growth initiative. Further, with improved mechanical strength and heat resistance, it is usefully applicable to automotive interiors/exteriors, construction interiors, etc. | 08-04-2011 |
20110256596 | MANUFACTURING METHOD OF OPTICALLY ACTIVE D TYPE LACTIC ACID USING BYPRODUCTS PREPARED FROM RICE POLISHING PROCESS - Disclosed is a method for manufacturing D type lactic acid wherein byproducts (e.g., rice bran and pulverized rice) obtained during a rice polishing process are saccharified by using α-amylase and amyloglucosidase and then fermented by a microorganism, | 10-20-2011 |
20110257323 | ECO-FRIENDLY POLYPROPYLENE-POLYLACTIC ACID COMPOSITE COMPOSITION - The present invention relates to a polypropylene-polylactic acid composite composition comprising a mixture of polypropylene resin and polylactic acid resin, wherein ethylene-octene copolymer grafted by anhyrdrous maleic acid, polylactic acid resin grafted by anhydrous maleic acid, polyethylene-glycidyl methacrylate resin and talc particles are added thereto. The composition reduces CO | 10-20-2011 |
20120245292 | MANUFACTURING METHOD OF POLYLACTIC ACID COMPOSITE COMPOSITION - Disclosed is a method for manufacturing a polylactic acid composite composition, and a polylactic acid composite composition formed thereby. More particularly, there is disclosed a method for manufacturing a polylactic acid composite composition including: melting and blending a composition containing 60-80 wt % of a poly(L-lactic acid) resin, 15-30 wt % of a poly(D-lactic acid) resin and 5-10 wt % of a poly(ethylene-alkyl acrylate-glycidyl methacrylate) resin at 190-195° C.; and injecting the resulting melt in a mold whose surface temperature is 100-110° C. The present invention provides a material having superior heat resistance, impact strength and tensile strength by blending the PLLA resin, the PDLA resin and the poly(ethylene-alkyl acrylate-glycidyl methacrylate) resin at specific proportion, under controlled processing and molding conditions. The polylactic acid composite composition prepared according to the present invention can replace the petroleum-based general-use polymer resins and engineering plastic materials that have been used for automobile parts with the environment-friendly biomass-based biomaterials, and may be usefully utilized for automobile interior and exterior parts. | 09-27-2012 |
20120245321 | MANUFACTURING LACTIDE FROM LACTIC ACID - Disclosed is a method for manufacturing | 09-27-2012 |
20120245322 | MANUFACTURING LACTIDE FROM LACTIC ACID - Disclosed is a method for manufacturing D-lactide from liquid D-lactic acid and a method for manufacturing D-polylactic acid with a weight-average molecular weight 50,000-20,000 g/mol from the prepared D-lactide. The disclosed method is advantageous in that D-lactide can be prepared in high yield through a relatively simple process as compared to the existing method. Thus, the cost for producing D-polylactic acid from the D-lactide can be reduced. | 09-27-2012 |
20120270303 | MANUFACTURING METHOD OF HIGH CONTENT OF STARCH FROM MICROALGAE - The present invention provides a medium for culturing microalgae comprising NaNO | 10-25-2012 |
20120302724 | MANUFACTURING METHOD OF LACTIDE FROM LACTIC ACID - The present invention provides a method of producing D-type lactide from liquid D-type lactic acid, and a method for producing D-type polylactic acid having a weight average molecular weight of about 50,000˜20,000 g/mol from the produced D-type lactide. The method of the present invention is advantageous in that D-type lactide can be obtained at a high yield by a simple method, compared to the conventional production methods. Consequently, production cost of D-type polylactic acid that is finally obtained from D-type lactide can be reduced. | 11-29-2012 |
20130029389 | METHOD FOR PRODUCING D TYPE LACTIC ACID WITH HIGH OPTICAL PURITY - The present invention provides a method for producing D-type lactic acid by using | 01-31-2013 |
20130030129 | MANUFACTURING METHOD OF POLY LACTIC ACID STEREOCOMPLEX USING SOLVENT CASTING METHOD - Disclosed is a method for manufacturing a polylactic acid film. More specifically, the present invention relates to a method for stably and effectively obtaining optimized stereocomplex crystals through specified boiling point and evaporation time of a solvent allowing the content of stereocomplex crystals to be 100%. | 01-31-2013 |
20130030147 | MANUFACTURING METHOD OF COLORED POLYLACTIC ACID RESIN - Disclosed is a technique of providing color to a polylactic acid resin which is promising as a plant-derived material for automotive interior/exterior parts. When a polylactic acid material is used as a covering fiber material of an automotive interior part, coloring is necessary for harmonization with other parts in the car. According to the disclosed technique, color is provided to a polylactic acid resin using a combination of a catalyst and an initiator when it is polymerized from lactide. The disclosed method is time-saving and economical since a colored resin can be polymerized and thus the complicated process of dyeing a white resin using a disperse dye and washing and drying the same can be avoided. | 01-31-2013 |
20130053464 | PREPARATION METHOD OF FLEXIBLE POLYLACTIDE STEREOCOMPLEX AND THE COMPOUND THEREOF - Disclosed are a polylactide stereocomplex with improved thermal stability and thus improved processability and a method for preparing the same. In order to confer flexibility to polymer chains, | 02-28-2013 |
20130266995 | METHOD FOR PRODUCING D-TYPE LACTIC ACID - The present invention provides a method for producing D-type lactic acid, by a sugar fermentation of sugar. In accordance with the method of the invention, lactic acid produced during the fermentation reaction is selectively absorbed and detached using an active carbon stick. The method does not require steps, such as, lactate concentration and electrodialytic water splitting that are required during the lactic acid fermentation process. According to the invention, D-type lactic acid can be produced in a high purity and with a high yield. Further, the time and cost associated with the separation process can be reduced in a great extent, thereby offering advantageous effects from a commercial perspective. | 10-10-2013 |
20130266996 | METHOD AND APPARATUS FOR PRODUCING LACTIC ACID - The present invention provides an apparatus and a method for producing lactic acid, wherein only lactic acid is selectively absorbed and separated from fermentation liquor using a lactic acid absorption resin and wherein a neutralizing agent is not used. The present invention does not include a neutralizing process and a process of converting lactate to lactic acid. The method of the present invention comprises the steps of: adding and mixing a culture medium, microorganism and sugar in a fermenter; passing a fermentation liquor through a microorganism filtration unit to remove microorganism through a cross-flow filtration; and selectively absorbing and separating lactic acid from filtered liquid using a lactic acid absorption resin. Accordingly, the separation and purification process of lactic acid from a fermentation liquor for polymerization is simplified. The manufacturing cost is thus reduced. The apparatus of the invention includes a fermenter for lactic acid fermentation; a filtration unit for removing a microorganism present in a fermentation liquor; and a lactic acid absorption resin for selectively absorbing lactic acid from a filtered liquid. | 10-10-2013 |
20130267716 | METHOD OF PREPARING LACTIDE FROM LACTATE - The present invention provides a method of preparing lactide with a high yield from lactate obtained through a fermentation process. In certain embodiments, the invention provides a method of preparing high-purity lactide with a high yield, wherein the method comprises treating lactate with a specific solvent, using a catalyst, and phase-separating the resultant. In accordance with the invention, costs for manufacturing polylactic acid can be considerably reduced. | 10-10-2013 |
20150057385 | PREPARATION METHOD OF FLEXIBLE POLYLACTIDE STEREOCOMPLEX AND THE COMPOUND THEREOF - Disclosed are a polylactide stereocomplex with improved thermal stability and thus improved processability and a method for preparing the same. In order to confer flexibility to polymer chains, | 02-26-2015 |