Patent application number | Description | Published |
20120112884 | APPARATUS AND METHOD FOR DETECTING COLLISION OF RFID TAGS - The present invention relates to an apparatus and method for detecting the collision of Radio Frequency IDentification (RFID) tags. In the apparatus and method for detecting the collision of RFID tags, when a subcarrier signal from which a carrier signal has been removed by a reader ASK analog demodulation device is inputted to a baseband receiver, a peak signal for the received tag signal is generated, and useful information about the generated peak signal within a symbol section is extracted. In the case where a collision is generated because two or more tags send signals to an RFID reader at the same time when the RFID reader communicates with the tags, the RFID reader can effectively detect the collision between the tags. | 05-10-2012 |
20120133488 | RFID ELECTRONIC SHELF APPARATUS AND METHOD OF DETECTING POISITONS OF TAGS USING THE SAME - A Radio Frequency IDentification (RFID) electronic shelf apparatus according to the present invention includes electronic shelf units stacked and each configured to have a plurality of reader antennas, a reader configured to recognize the electronic shelf units individually or in a group in order to recognize a tag included in the electronic shelf unit, and a position detection processing unit configured to group the plurality of reader antennas, included in the electronic shelf unit, and to obtain position information about the electronic shelf unit on which the tag is stacked based on tagging information provided by the reader. Accordingly, there are advantages of stability and accuracy in the transmission of information, reduced configuration costs, and efficient store management by solving the shadow region of an electric wave due to the stacking of items within an electronic shelf and the close arrangement of the items. | 05-31-2012 |
20120139712 | HYBRID SWITCH FOR EXTENDING ANTENNA PORT AND METHOD OF CONTROLLING THE SAME, AND RFID SYSTEM USING THE HYBRID SWITCH - A hybrid switch includes a plurality of antenna ports, a switching module for setting up a path so that a signal received from a reader passes through a designated antenna port from among the plurality of antenna ports, an antenna sense module for determining whether antennas have been attached to the plurality of antenna ports, and a communication module for processing a communication signal with the reader or a communication signal with other switch. According to the present invention, an electric wave fading zone can be obviated and RFID tags can be more efficiently recognized by increasing the number of antenna ports, without generating problems, such as the attenuation of transmission output of a reader and a reduction of the recognition ratio due to a collision between tags resulting from the constant transmission of power of the reader. | 06-07-2012 |
20130106580 | RFID SYSTEM AND COMMUNICATION METHOD THEREOF | 05-02-2013 |
20140077933 | METHOD FOR CHOOSING RFID COMMUNICATION MODE AND RFID DEVICE WHICH SUPPORTS NEAR-FIELD AND FAR-FIELD COMMUNICATION - Provided is a method of choosing a communication mode of an RFID device which supports near-field communication and far-field communication, including: interrupting generation of a self RF field signal; determining whether or not an RF field signal for near-field communication is detected; choosing the near-field communication mode when an external RF field signal for near-field communication is detected; and generating the self RF field signal for far-field communication when the external RF field signal for near-field communication is not detected, and choosing the communication mode according to whether or not a response signal is received. | 03-20-2014 |
20140145832 | RFID TAG INCLUDING MULTI-VOLTAGE MULTIPLIERS AND OPERATING METHOD THEREOF - There is provided an RFID tag having multi-voltage multipliers including two or more antennas configured to receive electromagnetic waves emitted from a reader, a first voltage multiplier configured to be connected to one of the antennas and change the received AC electromagnetic waves to DC voltage signals, a modulator configured to transmit backscattering communication signals by changing impedance through the antenna connected to the first voltage multiplier, and a second voltage multiplier configured to be connected to another antenna among the antennas and change AC electromagnetic waves received from the other antenna to DC voltage signals. | 05-29-2014 |
20140149079 | RFID SENSOR TAG SUPPORTING DUAL MODE LOGGING, RFID SENSOR READER AND CONTROLLING METHOD THEREOF - Disclosed is an RFID sensor tag supporting dual mode logging, an RFID sensor reader, and a controlling method thereof. The RFID sensor tag includes a controller that supports a dual mode including a scheduling logging mode in which sensor data is recorded in a predetermined interval and an alarm event logging mode in which sensor data is recorded in a predetermined alarm condition and records sensor data in the memory when a corresponding mode is performed and a memory that has a sensor data recording area divided per mode. | 05-29-2014 |
20150161420 | PASSIVE RADIO FREQUENCY IDENTIFICATION (RFID) READER, PASSIVE RFID TAG, AND TRANSMITTING AND RECEIVING METHODS USING EXTENDED PULSE-INTERVAL ENCODING (PIE) - An extended Pulse-Interval Encoding (PIE) modulating method in a Radio Frequency IDentification (RFID) system, wherein the method modulates 2-bit transmitted data and comprises: adjusting a length of a symbol according to a value of the first bit of the transmitted data; and adjusting a length of an energy transfer waiting section according to a value of the second bit of the transmitted data. | 06-11-2015 |
Patent application number | Description | Published |
20120124569 | COMMUNICATION MIDDLEWARE APPARATUS FOR GUEST, COMMUNICATION MIDDLEWARE APPARATUS FOR HOST, AND DRIVING METHOD USING THE SAME - There is provided a communication middleware apparatus for a host device, including: a profile manager configured to receive specification information of a guest device through a Low-rate Wireless Personal Area Network (LR-WPAN) module; an application program manager configured to search for an application program for a host device that has to be newly installed or updated, based on the specification information of the guest device, and to install or update the found application program for the host device in the host device; and a firmware manager configured to search for firmware for the guest device that has to be updated based on the specification information of the guest device, and to transmit the found firmware for the guest device to the guest device through the LR-WPAN module. | 05-17-2012 |
20150365538 | COST-COGNITIVE BASE STATION APPARATUS, COST-COGNITIVE USER TERMINAL, AND COST-COGNITIVE NETWORK METHOD - A cost-cognitive base station apparatus, a cost-cognitive user terminal, and a cost-cognitive network method, in which by recognizing costs based on network congestion, a user may select and receive appropriate network services, thereby reducing telecommunication expenses and inducing the user to a less congested network, which leads to improved network management efficiency. | 12-17-2015 |
Patent application number | Description | Published |
20090040929 | Method and apparatus for dynamically managing hierarchical flows - Provided are a method and apparatus for dynamically managing hierarchical flows that more efficiently process packet traffic while maintaining compatibility with an existing packet data network in transferring both circuit traffic and packet traffic in a packet switched network. The method for dynamically managing hierarchical flows includes: receiving data packets, classifying the data packets according to attributes of the received data packets, and producing first flows; determining whether traffic of each of the first flows exceeds a predetermined bandwidth limit, and performing a packet drop process or producing second flows for first flows that exceed the bandwidth limit, according to a flow-specific policy; and performing second flow processing on the second flows according to a second flow policy. Only flows exceeding the bandwidth limit or causing congestion are hierarchically divided for management. This makes it possible to finely manage the flows without complex operations. | 02-12-2009 |
20090086764 | System and method for time synchronization on network - A system and method for time synchronization on a network is provided. According to the system and method for time synchronization, a slave clock device does not continuously receive a time synchronization message periodically transferred from a master clock device and thus does not correct its time upon all such occasions. Rather, the slave clock device requests time information from the master clock device only when the slave clock device needs to correct its time, and receives a time synchronization message transferred from the master clock device and compensates for its time deviation only while the slave clock device is activated, thereby reducing its power consumption and amount of computation. | 04-02-2009 |
20120114055 | RECEIVING APPARATUS AND METHOD FOR PROVIDING INPUT BITS OF FAST FOURIER TRANSFORMER ACCORDING TO MODULATION - A technology is provided capable of improving the efficiency of an OFDM system by obtaining the performance in Bit Error Rate (BER) in a wireless communication using OFDM and determining the minimum FFT input bit that produces a SNR difference of 0.1 dB or below with respect to a theoretical BER graph at a desired performance. | 05-10-2012 |
20120163270 | WIRELESS COMMUNICATION SYSTEM FOR PROVIDING DIVERSITY GAINS FOR MULTICAST SERVICES AND METHOD FOR PROVIDING MULTICAST SERVICES USING THE SYSTEM - There are provided a wireless communication system for providing diversity gains for multicast services and a method of providing a multicast service. According to the wireless communication system, by transmitting, when terminals are partially distributed in each cell, data to areas where no user exists so as to reduce interference between other MBS (Multicast Broadcast System) zones and other cells that transmit only unicast services, performance deterioration may be minimized. | 06-28-2012 |
20120163272 | METHOD OF SETTING UP DYNAMIC MULTICAST AND BROADCAST SERVICE ZONE FOR PROVIDING MOBILE INTERNET PROTOCOL TELEVISION SERVICE - A technology of setting up a MBS zone for providing a mobile IPTV service is provided in which the MBS zone is effectively managed, so that QoS is prevented from being degraded due to the handover delay that is caused by a MBS handover occurring when a user moves between MBS zones. | 06-28-2012 |
20120166801 | MUTUAL AUTHENTICATION SYSTEM AND METHOD FOR MOBILE TERMINALS - Provided is a technique for mutual authentication between different kinds of objects (devices, apparatuses, users, etc.) by expanding the kinds of objects that are subject to authentication, such as authentication between users, authentication between users and an apparatuses (devices, equipment, terminals, etc.), and authentication between apparatuses (devices, equipment, terminals, etc.). | 06-28-2012 |
20130021961 | METHOD AND APPARATUS FOR DYNAMICALLY CONFIGURING MULTICAST AND BROADCAST SERVICE (MBS) ZONE IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and apparatus for configuring a Multicast and Broadcast Service (MBS) zone dynamically in a mobile communication environment. According to an example, there is provided a method of seamlessly changing base stations configuring a MBS zone whenever one or more mobile terminals configuring the MBS zone move or whenever a predetermined time period has elapsed to thereby provide a MBS with excellent quality while saving radio resources. | 01-24-2013 |
20130155939 | METHOD AND APPARATUS FOR ACQUIRING INITIAL SYNCHRONIZATION USING RELAY-AMBLE IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for acquiring initial synchronization in a wireless communication system are provided. A relay station determines whether or not the initial synchronization is acquired, determines a start position of a frame using a peak of an autocorrelation signal detected based on a preamble and a relay-amble (R-amble) received from a base station in the case in which the initial synchronization is not acquired, and determines the start position of the frame using a peak of an autocorrelation signal detected based on the relay-amble received from the base station in the case in which the initial synchronization is acquired. | 06-20-2013 |
20130286923 | MULTI-CARRIER TRANSMITTING APPARATUS AND METHOD FOR MULTICAST SERVICE - Provided are an apparatus and method for transmitting multi-carriers to provide a high-quality service to multicast-based service subscriber terminals. The method includes: mapping first data for providing the multicast service, and second data different from the first data, to s different antennas; converting the first mapped data into a first Intermediate Frequency (IF) signal and the second mapped data into a second IF signal; converting the first IF signal into a first RF signal having a carrier frequency, and deciding a power intensity of the first RF signal so that the first RF signal is transmitted over the entire coverage region of the base station; and converting the second IF signal into a second RF signal having the other carrier frequency, and to deciding a power intensity of the second RF signal so that the second RF signal is transmitted over a predetermined region around the base station. | 10-31-2013 |
20140098733 | APPARATUS AND METHOD FOR PROVIDING MULTICAST AND BROADCAST SERVICE IN MOBILE COMMUNICATION ENVIRONMENT - Provided are an apparatus and method for providing a multicast and broadcast service (MBS) in a mobile communication environment. The method includes setting an MBS zone to be provided with content and include at least one member base station, configuring the MBS zone by classifying the at least one member base station belonging to the MBS zone into active members that simultaneously transmit MBS traffic and an MBS control parameter and inactive members that transmit only the MBS control parameter according to a predefined rule, and connecting a data delivery path through the active member to transmit the MBS traffic to a terminal. | 04-10-2014 |
20140137161 | METHOD FOR SELECTING BASE STATION FOR DYNAMIC CONFIGURATION OF MOBILE IPTV SERVICE REGION IN MOBILE COMMUNICATION, SYSTEM THEREFOR, DEVICE THEREFOR, AND COMPUTER-READABLE RECORDING MEDIUM - Disclosed are a method for selecting a base station for dynamic configuration of a mobile IPTV service region in mobile communication, a system therefor, a device therefor, and a computer-readable recording medium. The present invention provides a method for selecting a base station for dynamic configuration of a mobile IPTV service region in mobile communication which sets up a mobile IPTV service zone by using base stations selected by a terminal to dynamically configure a mobile IPTV service region for supplying a mobile IPTV service using a multicast/broadcast method in a mobile communication network, and maintains continuous service of the mobile IPTV, a system therefor, a device therefor, and a computer-readable recording medium. | 05-15-2014 |
Patent application number | Description | Published |
20130167183 | IPTV DATA COLLECTION APPARATUS AND METHOD BASED ON MULTI-CAST - Disclosed is an Internet protocol television (IPTV) data collection apparatus including: a transmission path setting unit acquiring a transmission path of an IPTV provider and setting a communication path with respect to a terminal of the transmission path; a message transmitting and receiving unit transmitting a multicast message to at least one terminal belonging to the transmission path and receiving a response message including information related to the IPTV provider and corresponding to the transmitted multicast message; and a data storing unit storing the information related to the IPTV provider, and a method thereof. | 06-27-2013 |
20130212241 | SYSTEM AND METHOD FOR OPERATING NETWORK BASED ON NETWORK VIRTUALIZATION - A virtual network operating apparatus and method are provided. The virtual network operating method includes configuring, by a virtual network operating apparatus, a plurality of virtual networks identified by domain names, setting, by the virtual network operating apparatus, representative virtual routers representing each of the virtual networks for each virtual network, setting, by the virtual network operating apparatus, representative routing information including an IP address of each of the representative virtual routers in each virtual router included in the virtual networks, and transmitting, by each virtual router, a packet using the set representative routing information. | 08-15-2013 |
20130265876 | APPARATUS AND METHOD FOR CONTROLLING PACKET FLOW IN MULTI-STAGE SWITCH - Provided are an apparatus and method for controlling packet flow in a multi-stage switch. According to an aspect, there is provided an apparatus for controlling packet flow in a multi-stage switch, including: one or more source line cards configured to receive one or more packets, and to transfer the one or more packets to a switch fabric including a plurality of switch modules forming one or more switching stages such that the one or more packets are transferred along different switching paths in the switch fabric; and a destination line card configured to receive the one or more packets output from the switch fabric, and to transfer Acknowledge (ACK) messages for informing that the packets have been received, to the source line cards, in a predetermined time period. | 10-10-2013 |
Patent application number | Description | Published |
20120230269 | INTEGRATED ACCESS APPARATUS FOR ALL-IP CONVERGED NETWORK - An integrated access system for All-IP converged network is provided. According to an aspect, by integrating the common factors of existing complex wireless networks to load-reduce and simplify the wireless networks and convert them using Internet access technology to thereby simplify a network architecture, integratively operating radio accesses, ensuring end-to-end quality, and providing service adaptiveness, easiness in operation, CAPEX/OPEX, and excellent service adaptiveness can be achieved. | 09-13-2012 |
20130265876 | APPARATUS AND METHOD FOR CONTROLLING PACKET FLOW IN MULTI-STAGE SWITCH - Provided are an apparatus and method for controlling packet flow in a multi-stage switch. According to an aspect, there is provided an apparatus for controlling packet flow in a multi-stage switch, including: one or more source line cards configured to receive one or more packets, and to transfer the one or more packets to a switch fabric including a plurality of switch modules forming one or more switching stages such that the one or more packets are transferred along different switching paths in the switch fabric; and a destination line card configured to receive the one or more packets output from the switch fabric, and to transfer Acknowledge (ACK) messages for informing that the packets have been received, to the source line cards, in a predetermined time period. | 10-10-2013 |
Patent application number | Description | Published |
20120093261 | METHOD AND APPARATUS OF TRANSMITTING DOWNLINK CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - Disclosed herein are a method and an apparatus for transmitting a downlink control signal in a wireless communication system. The apparatus for transmitting a downlink control signal includes: a preamble symbol generator generating preamble orthogonal frequency division multiplexing (OFDM) symbols based on a first pilot pattern among pilot patterns for each of the plurality of transmit antennas; a midamble symbol generator generating midamble OFDM symbols based a second pilot pattern excluding the first pilot pattern from the pilot patterns for each of the plurality of transmit antennas; an IFFT unit performing inverse fast Fourier transform (IFFT) for each transmit antenna on the preamble OFDM symbol and the midamble OFDM symbol; and a plurality of transmit antennas transmitting the preamble OFDM symbols and the midamble OFDM symbols. | 04-19-2012 |
20120257669 | DATA PROCESSING METHOD, EQUALIZER AND RECEIVER - A data processing method, an equalizer, and a receiver in a wireless communication system including a relay station are provided. The data processing method includes: receiving a base station signal from a base station; receiving a relay station signal from a relay station; determining a propagation delay between the base station signal and the relay station signal; generating an equalizing signal in which interference generated between the base station signal and the relay station signal is alleviated in consideration of the propagation delay; and recovering information bits transmitted by the base station from the equalizing signal. According to an exemplary embodiment of the present invention, it is possible to alleviate performance deterioration due to an interference problem generated in a relay system. | 10-11-2012 |
20120269251 | METHOD AND APPARATUS FOR ESTIMATING SIGNAL TO NOISE RATIO IN WIRELESS COMMUNICATION SYSTEM - There is provided a method and apparatus for estimating a signal to noise ratio (SNR) in a wireless communication system. The apparatus selects a preamble signal for each of a plurality of sectors from a reception signal experienced by fast Fourier transform (FFT), outputs a correlation signal by performing a correlation between the preamble signal for each sector and a preamble reference signal, estimates power of the reception signal and noise power for each sector based on the correlation signal, selects a minimum value from among the noise powers for the sectors, outputs a net power for each sector by subtracting the minimum value from the power of the reception signal for each sector, and calculates the SNR by dividing the net power for each sector by the minimum value. | 10-25-2012 |
20140254503 | SIGNAL DETECTOR FOR UPLINK CONTROL CHANNEL AND TIME ERROR CORRECTION METHOD THEREOF - Provided are a signal detector for an uplink control channel and a time error correction method capable of simply correcting time errors, which occur during adjustment of a starting point of an FFT of an uplink control channel signal, by use of differential demodulation and thus improving the signal detection performance of an uplink control channel. | 09-11-2014 |
Patent application number | Description | Published |
20100151920 | METHOD OF OPERATING BASE STATION WITH LOW POWER CONSUMPTION - Provided is a method of reducing power consumption of a base station. A method of operating a base station with low power consumption in a mobile communication system includes: reporting status information about a level of traffic being served by a base station in an active mode to an apparatus for managing power consumption of the base station; and switching from the active mode to an inactive mode in response to a mode change command from the apparatus. | 06-17-2010 |
20100157922 | PHYSICAL DOWNLINK CONTROL CHANNEL RESOURCE-BASED SCHEDULING METHOD AND APPARATUS USED BY BASE STATION - Provided are a physical downlink control channel (PDCCH)-based scheduling method and apparatus suitable for use by a base station in a long-term evolution (LTE) system. The scheduling method includes: determining an aggregation level of a common search space of a PDCCH by considering channel quality of a plurality of user equipments (UEs); identifying the number of PDCCH candidates and the number of messages, which require allocation of the common search space, based on the determined aggregation level and selecting messages by a smaller number of the number of messages and the number of PDCCH candidates; and allocating PDCCH resources and physical downlink shared channel (PDSCH) resources for the selected messages. In a situation where the PDCCH resources are shared by downlink scheduling information and uplink scheduling information of different UEs, the PDCCH resource-based scheduling method can be used by the base station to efficiently utilize the PDCCH resources. | 06-24-2010 |
20100159932 | METHOD AND SYSTEM FOR CONTROLLING HANDOVER BASED ON WIRELESS LINK QUALITY - A method and system for controlling handover based on a quality of a wireless link of a mobile terminal is provided. The method includes requesting the mobile terminal to measure a quality of a wireless link, receiving a report message about a measured wireless link quality from the mobile terminal, determining a target base station based on the report message about the measured wireless link quality, and determining an optimum handover scheme according to wireless link quality between the target base station and the mobile terminal and between the serving base station and the mobile terminal to make a handover. | 06-24-2010 |
20100159938 | CONTROL CHANNEL MANAGING APPARATUS, CONTROL CHANNEL SEARCHING APPARATUS, AND CONTROL CHANNEL ALLOCATION METHOD - There are provided a control channel managing apparatus of a base station, a control channel searching apparatus of a user equipment (UE) and a control channel allocating method in a mobile communication system. When an aggregation level is high and a plurality of UEs having the same starting address of a control channel search space are scheduled in a corresponding subframe, control information with respect to conflicting UEs which have lower priorities in terms of allocation of control information can be transmitted through the conflicting UE space. Hence, more control information can be transmitted and the number of available UEs corresponding to the control information increases, and thus an improvement in the performance of the entire network can be achieved. | 06-24-2010 |
Patent application number | Description | Published |
20090107355 | METHOD FOR MANUFACTURING A FIBER-REINFORCED COMPOSITE SABOT BY USING BAND/HOOP LAMINATION - Disclosed is a method for manufacturing a fiber-reinforced composite sabot for use in APFSDS (Armor Piercing Fin Stabilized Discarding Sabot), wherein both Band lamination and Hoop lamination are used in manufacturing a polymer based FRP( Fiber Reinforced Plastic) for use in the sabot in order to prevent the prepreg delamination in the circumferential direction caused by the radial lamination. The method for manufacturing a fiber-reinforced composite sabot of the present invention comprises the steps of a sub-segment forming step, a piece forming step and a sabot forming step, and the lamination is carried out with improved segment lamination form preventing the damage in the 120 degree surface in the process of treating the sabot. | 04-30-2009 |
20100276082 | METHOD FOR MANUFACTURING A FIBER-REINFORCED COMPOSITE SABOT WITH IMPROVED INTERFACIAL CHARACTERISTICS BY USING SHORT FIBER - Disclosed is a method for manufacturing a fiber-reinforced composite sabot for use in APFSDS (Armor Piercing Fin Stabilized Discarding Sabot) which has improved strength to weight ratio with low weight and high strength by using one-directional fiber prepreg ply lamination method. In order to prevent delamination of the radially laminated composite sabot, short fibers are deposited on the interfacial plane thereby spreading the expansion force to fiber as well as the resin. | 11-04-2010 |
20100276830 | Method For Manufacturing A Fiber-Reinforced Composite Sabot By Using Resin-Injection Vacuum Assisted Resin Transfer Molding After Stitching - Disclosed is a method for manufacturing a fiber-reinforced composite sabot for use in APFSDS (Armor Piercing Fin Stabilized Discarding Sabot) wherein a plurality of fiber mats are laminated instead of one-directional prepreg ply and whole part is reinforced by stitching through long fiber bundle in order to enhance circumferential shear strength, and high quality fiber-reinforced composite sabot is manufactured in a short time using resin-injection vacuum assisted resin transfer molding after stitching. | 11-04-2010 |
20110204164 | METHOD FOR PREPARING IMPREGNATING PITCH FOR CARBON-CARBON COMPOSITE - The present invention discloses a method for preparing an impregnating pitch which is used for the manufacture of carbon-carbon composites having excellent mechanical properties at an ultra high temperature, abrasion resistance and the like, wherein the impregnating pitch having a low viscosity and an improved carbonization yield is provided by facilitating cross-linking reactions between the aromatic compounds in the pitch, while eliminating heat treatment. | 08-25-2011 |
Patent application number | Description | Published |
20120124208 | APPARATUS AND METHOD FOR TRANSMITTING CONTENTS ON A RELAY NODE BETWEEN SENDING END AND RECEIVING END - An apparatus and method for transmitting contents on a relay node disposed between a sending end and a receiving end is provided. If a content, which is identical to a content requested by a user terminal, is currently being transmitted or is in a waiting mode for content transmission, a relay node, for example, a router, disposed between a sending end and a receiving end duplicates the content and transmits the duplicated content to the user terminal, thereby reducing the work load of a service terminal and the network traffic load. | 05-17-2012 |
20120230269 | INTEGRATED ACCESS APPARATUS FOR ALL-IP CONVERGED NETWORK - An integrated access system for All-IP converged network is provided. According to an aspect, by integrating the common factors of existing complex wireless networks to load-reduce and simplify the wireless networks and convert them using Internet access technology to thereby simplify a network architecture, integratively operating radio accesses, ensuring end-to-end quality, and providing service adaptiveness, easiness in operation, CAPEX/OPEX, and excellent service adaptiveness can be achieved. | 09-13-2012 |
Patent application number | Description | Published |
20130279003 | POLARIZER HAVING PROTECTION FILMS IN TWO SIDES AND OPTICAL DEVICE COMPRISING THE SAME - A double-sided polarizer includes a polarizing film, a first adhesive layer formed on one surface of the polarizing film, a second adhesive layer formed on the other surface of the polarizing film, a first transparent film formed on the first adhesive layer, and a second transparent film formed on the second adhesive layer, wherein the first adhesive layer and the second adhesive layer are formed of an active energy line-curable adhesive and the first adhesive layer is 0.1 μm to 3 μm thick, and there is also provided an optical device including the double-sided polarizer. | 10-24-2013 |
20140071530 | RESIN COMPOSITION FOR OPTICAL FILM AND COMPENSATION FILM USING THE SAME - Provided are a composition for an optical film comprising 40 wt % to 94 wt % of an acrylic resin; 5 wt % to 40 wt % of a styrene-acrylonitrile copolymer having a weight-average molecular weight less than 1,000,000; and 1 wt % to 20 wt % of an ultra-high molecular weight styrene-acrylonitrile copolymer having a weight-average molecular weight ranging from 1,000,000 to 9,000,000, and an optical film using the composition. | 03-13-2014 |
20140072731 | ADHESIVE FOR POLARIZING PLATE AND POLARIZING PLATE INCLUDING THE SAME - The present invention relates to an adhesive composition including 100 parts by weight of a first epoxy compound having a glass transition temperature of a homopolymer of not less than 120° C., 30 parts by weight to 100 parts by weight of a second epoxy compound having a glass transition temperature of a homopolymer of not more than 60° C., and 0.5 parts by weight to 20 parts by weight of a cationic photopolymerization initiator, and a polarizing plate using the same. | 03-13-2014 |
20140106149 | POLARIZER HAVING PROTECTION FILMS IN TWO SIDES AND OPTICAL DEVICE COMPRISING THE SAME - A double-sided polarizer includes a polarizing film, a first adhesive layer formed on one surface of the polarizing film, a second adhesive layer formed on the other surface of the polarizing film, a first transparent film formed on the first adhesive layer, and a second transparent film formed on the second adhesive layer, wherein the first adhesive layer and the second adhesive layer are formed of an active energy line-curable adhesive and the first adhesive layer is 0.1 μm to 3 μm thick, and there is also provided an optical device including the double-sided polarizer. | 04-17-2014 |
20140125926 | RETARDATION FILM, MANUFACTURING METHOD THEREOF, AND LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE SAME - There are provided a retardation film, a manufacturing method thereof, and a liquid crystal display device including the same. The retardation film includes 1) an acrylic film, 2) a coating layer of a negative C-type material, and 3) a primer layer including a copolymer containing an aromatic vinyl-based unit and a maleic acid-based unit, provided between the acrylic film and the coating layer of the negative C-type material. The retardation film may be used in an in-plane switching mode liquid crystal display device. | 05-08-2014 |
20140128546 | RESIN COMPOSITION AND OPTICAL COMPENSATION FILM FORMED USING THE SAME - There are provided a resin composition and an optical compensation film formed using the same, and more particularly, to a resin composition comprising (a) alkyl (meth)acrylate units, (b) styrene units, (c) 3 to 6 element heterocyclic units substituted with at least one carbonyl group and (d) vinyl cyanide units, and an optical film formed using the resin composition. Further, a resin composition according to the present invention can provide an optical film having excellent optical properties and superior optical transparency, less haze and superior mechanical strength and heat resistance simultaneously. Therefore, an optical film formed using a resin composition of the present invention can be used in various applications, e.g., electronic information devices such as display devices. Particularly, the optical film is suitable for a compensation film used in the IPS mode. | 05-08-2014 |
Patent application number | Description | Published |
20100125727 | METHOD AND APPARATUS FOR RECONFIGURING SOFTWARE IN SDR TERMINAL - A method and apparatus for reconfiguring software in a software-based wireless terminal when a new wireless communication service is to be carried out is provided. The method of reconfiguring software at a software defined radio (SDR) terminal including one or more reconfigurable elements, includes: indentifying program installation time and program startup time with respect to the respective reconfigurable elements, selecting a reconfigurable element from the one or more reconfigurable elements based on the program installation time and the program startup time, and placing a program on the selected reconfigurable element. Accordingly, time for installing a new wireless communication service can be reduced in the SDR mobile communication terminal. Thus, convenience can be provided to a user. | 05-20-2010 |
20100136973 | METHOD AND APPARATUS FOR PERFORMING VERTICAL HANDOVER IN SDR TERMINAL - Disclosed are a method and apparatus for allowing a Software Defined Radio (SDR) terminal to perform a vertical handover between different services. The vertical handover method includes: receiving a handover request from an application service which is currently being executed; selecting a new application service which is a handover target from among a plurality of application services, in response to the handover request; installing the new application service in the SDR terminal so that the new application service is executable by the SDR terminal; and performing a handover to the new application service. Accordingly, since handover is performed seamlessly between different services, continuity of service may be ensured. | 06-03-2010 |
20120157051 | METHOD FOR CONROLLING ACCESS OF SUBSCRIBERS IN WIRELESS COMMUNICATION SYSTEM SUPPORTING FEMTO CELL AND APPARATUS FOR THE SAME - Disclosed is a method for controlling access of subscribers of a gateway in a communication system supporting a femto cell, the method including: by user equipment (UE), receiving a first access request message, which makes a request to access a femto base station (BS), from the femto BS; directly acquiring a business subscriber database (DB), which includes a list of UE admittable to access the femto BS, from a DB module; and determining whether to admit the access of the UE on the basis of the business subscriber DB, wherein the determining whether to admit the access of the UE includes admitting the access of the UE if a user equipment identifier (UE ID) for identifying the UE is included in the list of UE. | 06-21-2012 |
20120157077 | METHOD FOR DYNAMIC CHANGE OF OPERATION MODE IN WIRELESS COMMUNICATION SYSTEM - Disclosed is a method of operating a femto base station (BS) in a wireless communication system, the method comprising: receiving an access request comprising a closed subscriber group (CSG) identifier (ID) from user equipment (UE); determining a number N of UE accessing the femto BS; ascertaining an access type to determine whether the UE is a CSG UE or a non-CSG UE of the femto BS on the basis of the CSG ID of the UE; and determining whether to admit access of the UE on the basis of the access type, the N and access admittable information, the access admittable information comprising U | 06-21-2012 |
20120157154 | METHOD FOR CONTROLLING TRANSMISSION POWER IN FEMTO BASE STATION AND APPARATUS THEREOF - A method and an apparatus for controlling transmission power in a femto base station is provided. The method includes: predicting femto base station interference to be given from an adjacent femto base station to a terminal; predicting macro base station interference to be given from a macro base station to the terminal; determining transmission power for the terminal; and transmitting a downlink signal to the terminal on the basis of the transmission power, wherein the femto base station interference is predicted on the basis of a distance between serving femto base station and the adjacent femto base station and the transmission power of the adjacent femto base station, and the macro base station interference is predicted on the basis of a distance between serving femto base station and the macro base station and the transmission power of the macro base station. | 06-21-2012 |
20140241323 | COORDINATED MULTI-POINT TRANSMISSION AND RECEPTION METHOD IN OVERLAID CELL ENVIRONMENT - According to the present invention, a method of performing coordinated multi-point transmission and reception in an overlaid cellular system in which a first base station and a second base station overlay each other, the method comprising performing a handover using a coordinated multi-point transmission and reception scheme based on CRS-RS (Channel State Indicator-Reference Signal) information of user equipment by the first and second base stations. | 08-28-2014 |
20140308953 | METHOD AND APPARATUS FOR MANAGING RADIO RESOURCES IN MULTI-CARRIER AND HETNET-INTEGRATED MOBILE ACCESS ENVIRONMENT - The present invention relates to a method and apparatus for managing radio resources in a multi-carrier and heterogeneous network-integrated radio access environment. A method of managing radio resources in a BS supporting multiple carriers includes sending an RRC connection reconfiguration message, including measurement control information, to UE, receiving a measurement report, including a measurement result for an HetNet RAT cell, from the UE, determining to configure HetNet RAT bearer connection with the UE based on the measurement report, sending an RRC connection reconfiguration message, requesting to configure the HetNet RAT bearer connection, to the UE, and sending some of or the entire traffic for the UE, to the UE through the HetNet RAT bearer. If overload or interference occurs in a serving cell, some of or the entire traffic is transmitted through a cell based on HetNet RAT, if necessary. Accordingly, load balancing or interference coordination can be achieved. | 10-16-2014 |
20140315566 | METHOD AND APPARATUS FOR CONTROLLING INTERFERENCE IN WI-FI-INTEGRATED SMALL CELL ENVIRONMENT - Provided are a method and apparatus for controlling inter-cell interference. In accordance with the present invention, a Wi-Fi signal including interference control information is received from a neighboring cell, the interference control information is transmitted to a small cell transmission/reception module, and a small cell signal is transmitted or received by controlling inter-cell interference based on the interference control information. | 10-23-2014 |
20150055483 | METHOD AND APPARATUS FOR CONTROLLING RESOURCE OF CLOUD VIRTUAL BASE STATION - A method and apparatus for managing a cloud virtual base station system are disclosed. The present invention comprises configuring an initial resource and reconfiguring the resource to add or remove a resource of an execution file of the cloud virtual base station system, monitoring an error of the cloud virtual base station system, a wireless resource, a status of the execution file, or a configuration status of the reconfigured resource, managing configuration information of a list of software added or removed during an operation, controlling the cloud virtual base station system in a predetermined specific mode, managing hardware information, file information, or control information of each module of the cloud virtual base station system, and managing the execution file for each module of the cloud virtual base station system by adding or removing the predetermined specific mode initially or during an operation. | 02-26-2015 |
20150055629 | METHOD AND APPARATUS FOR CONTROLLING INTERFERENCE BASED ON CARRIER AGGREGATION FOR SMALL BASE STATION - A carrier aggregation-based interference control method and apparatus for small base stations are disclosed. The present invention comprises setting a primary component carrier (PCC) as a first carrier and setting a secondary component carrier (SCC) as a second carrier, monitoring a signal-to-interference plus noise ratio (SINR) of the first carrier or the second carrier, and determining whether the SINR of the first carrier is smaller than a predetermined threshold. | 02-26-2015 |
Patent application number | Description | Published |
20110002220 | TUNNELING-BASED MOBILITY SUPPORT EQUIPMENT AND METHOD - A tunneling-based mobility support method and apparatus is provided which supports a mobility of a mobile node in a heterogeneous network regardless of IP versions (IPv4/IPv6). The mobility support apparatus includes a load balancer, a plurality of mobility support servers, and a plurality of end routers each being TCP connected to each of the mobility support servers. When receiving a tunnel establishment request message from the mobile node, the load balancer selects one mobility supports server from a plurality of mobility support servers to control a mobility service for the mobile node. The selected mobility support server selects a plurality of tunnel end addresses of one end router from the plurality of end routers to establish an IP tunnel with the mobile node according to a predetermined criterion, forwards the tunnel establishment request message to the end router, and sends the mobile node a tunnel establishment response message including the tunnel end address of the selected end router. | 01-06-2011 |
20130191906 | APPARATUS AND METHOD FOR SUPPORTING PORTABLE MOBILE VIRTUAL PRIVATE NETWORK SERVICE - An apparatus and method for supporting a portable mobile VPN service are provided. The method accesses a public network to generate a security tunnel, maps the generated security tunnel and a VPN address, stands by for authentication of a mobile terminal which desires to access a VPN, authenticates a mobile terminal which desires to access the VPN, and assigns an internal address which is used in the VPN according to the authentication result. | 07-25-2013 |
20140146128 | SYSTEM AND METHOD FOR PROVIDING VIDEO CONFERENCE SERVICE - A system for providing a video conference service is provided. The system includes a Multipoint Processor (MP) configured to process media occurring during a video conference so as to allow the processed media to be transmitted/received between user terminals; and one or more Multipoint Controller (MC) configured to control a session of a user terminal participating in a multi-participant video conference, wherein the MP and the MC are separate from each other. | 05-29-2014 |
Patent application number | Description | Published |
20120134265 | TRAFFIC CONTROL SYSTEM FOR STEP-BY-STEP PERFORMING TRAFFIC CONTROL POLICIES, AND TRAFFIC CONTROL METHOD FOR THE SAME - Provided is a technique of step-by-step performing a plurality of traffic control policies by differentiating policies to be performed for each subscriber and establishing policy layers requiring a relatively long time to process traffic at later stages, thereby preventing a traffic control system from processing unnecessary traffic, reducing the load of the traffic control system upon processing traffic, and improving the performance of the traffic control system. | 05-31-2012 |
20120140640 | APPARATUS AND METHOD FOR DYNAMICALLY PROCESSING PACKETS HAVING VARIOUS CHARACTERISTICS - An apparatus for processing different types of packets using various interfaces and method thereof. The apparatus uses a general-purpose processor, instead of a particular network processor, and uses a general open source software compiler without the use of a particular compiler and an application program interface (API) for use in processing a specific packet, and accordingly, it is easy to reuse software when upgrading hardware and software. | 06-07-2012 |
20120163392 | PACKET PROCESSING APPARATUS AND METHOD - A packet processing apparatus and method are provided. According to the packet processing apparatus and method, it is possible to manufacture a product within a short period of time in a case in which there are signals that are not provided by an existing network processing unit (NPU) through a bridging algorithm that is realized in a field programmable gate array (FPGA). | 06-28-2012 |
20130188635 | NETWORK DEVICE AND METHOD FOR PROCESSING TRAFFIC USING MULTI-NETWORK INTERFACE CARD - A method for processing traffic using a multi-network interface card and a network device employing the method are provided. The network device includes a first network card configured to classify and filter traffic, a second network card configured to inspect and process the traffic classified by the first network card, a processor configured to manage the first and second network cards and apply network policies to the first and second network cards, respectively, and a memory configured to store the network policies. | 07-25-2013 |
Patent application number | Description | Published |
20100151876 | APPARATUS AND METHOD FOR CONTROLLING INTER-CELL INTERFERENCE - A technology for inter-cell interference control is provided. In one general aspect, the inter-cell interference may be controlled by resource allocation scheduling or power management. A cell may be divided into a plurality of regions. A constant available resource band and a selectively available band are allocated to each region. Each of the allocated resource bands is assigned with an interference characteristic. The resource allocation scheduling and the power management are performed according to the resources allocated to the respective regions and the interference characteristics assigned to the respective resources. | 06-17-2010 |
20140241323 | COORDINATED MULTI-POINT TRANSMISSION AND RECEPTION METHOD IN OVERLAID CELL ENVIRONMENT - According to the present invention, a method of performing coordinated multi-point transmission and reception in an overlaid cellular system in which a first base station and a second base station overlay each other, the method comprising performing a handover using a coordinated multi-point transmission and reception scheme based on CRS-RS (Channel State Indicator-Reference Signal) information of user equipment by the first and second base stations. | 08-28-2014 |
20140308953 | METHOD AND APPARATUS FOR MANAGING RADIO RESOURCES IN MULTI-CARRIER AND HETNET-INTEGRATED MOBILE ACCESS ENVIRONMENT - The present invention relates to a method and apparatus for managing radio resources in a multi-carrier and heterogeneous network-integrated radio access environment. A method of managing radio resources in a BS supporting multiple carriers includes sending an RRC connection reconfiguration message, including measurement control information, to UE, receiving a measurement report, including a measurement result for an HetNet RAT cell, from the UE, determining to configure HetNet RAT bearer connection with the UE based on the measurement report, sending an RRC connection reconfiguration message, requesting to configure the HetNet RAT bearer connection, to the UE, and sending some of or the entire traffic for the UE, to the UE through the HetNet RAT bearer. If overload or interference occurs in a serving cell, some of or the entire traffic is transmitted through a cell based on HetNet RAT, if necessary. Accordingly, load balancing or interference coordination can be achieved. | 10-16-2014 |
Patent application number | Description | Published |
20120153729 | MULTI-INPUT BIDIRECTIONAL DC-DC CONVERTER - Provided is technology for charge and discharge control of a plurality of energy storage modules having different properties. For achieving the technology, there is provided a multi-input bidirectional DC-DC converter including: a first bidirectional DC-DC converter including a first input unit which stores an input current from a first energy storage module, a primary-side first half-bridge which is connected to the first input unit and controls an input current from the first energy storage module, an output unit which includes an output capacitor, a secondary-side half-bridge which is connected to the output unit and controls the output voltage, and a first transformer whose primary side is connected to the primary-side first half-bridge, whose secondary side is connected to the secondary-side first half-bridge, and which transforms a voltage at the primary side or at the secondary side according to a power mode; and a n-th bidirectional DC-DC converter. | 06-21-2012 |
20120163035 | MULTI-PHASE INTERLEAVED BIDIRECTIONAL DC-DC CONVERTER - Provided is power conversion technology for charge and discharge control of an energy storage module such as battery or super capacitor. For achieving the technology, there is provided a multi-phase interleaved bidirectional DC-DC converter including: a first bidirectional DC-DC converter including a input unit which includes a first input inductor and an energy storage module which stores input current from the energy storage module, a first primary-side half-bridge which is connected to the first input inductor of the input unit and controls the input current from the energy storage module, an output unit which includes an output capacitor, a first secondary-side half-bridge which is connected to the output unit and controls the output voltage, and a first transformer whose primary side is connected to the first primary-side half-bridge, whose secondary side is connected to the first secondary-side half-bridge, and which transforms a voltage at the primary side or at the secondary side according to a power mode; and a n-th bidirectional DC-DC converter, wherein the n-th bidirectional DC-DC converter is composed of one or more n-th bidirectional DC-DC converters. | 06-28-2012 |
20130003423 | MULTI-INPUT BIDIRECTIONAL DC-DC CONVERTER WITH HIGH VOLTAGE CONVERSION RATIO - A multi-input bidirectional DC-DC converter with a high voltage conversion ratio is provided. The multi-input bidirectional DC-DC converter with a high voltage conversion ratio implements phase control loops independent from one another so as to realize independent control of charge and discharge in a plurality of energy storage modules, and thus a failure in one of energy storage modules does not affect the other energy storage modules. In addition, it is possible to easily add or remove a control loop that is controlled independently from other control loops. | 01-03-2013 |
20130003424 | MULTI-PHASE INTERLEAVED BIDIRECTIONAL DC-DC CONVERTER WITH HIGH VOLTAGE CONVERSION RATIO - A multi-phase interleaved bidirectional DC-DC converter with a high voltage conversion ratio is provided. The multi-phase interleaved bidirectional DC-DC converter with a high voltage conversion ratio allows effective control of charge/discharge in multi-energy storage modules including a battery cell module or a super capacitor module, which is characterized in low voltage and high current output. Accordingly, a high-efficiency bidirectional DC-DC converter for use in battery charge/discharge can be implemented. | 01-03-2013 |
Patent application number | Description | Published |
20120093261 | METHOD AND APPARATUS OF TRANSMITTING DOWNLINK CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - Disclosed herein are a method and an apparatus for transmitting a downlink control signal in a wireless communication system. The apparatus for transmitting a downlink control signal includes: a preamble symbol generator generating preamble orthogonal frequency division multiplexing (OFDM) symbols based on a first pilot pattern among pilot patterns for each of the plurality of transmit antennas; a midamble symbol generator generating midamble OFDM symbols based a second pilot pattern excluding the first pilot pattern from the pilot patterns for each of the plurality of transmit antennas; an IFFT unit performing inverse fast Fourier transform (IFFT) for each transmit antenna on the preamble OFDM symbol and the midamble OFDM symbol; and a plurality of transmit antennas transmitting the preamble OFDM symbols and the midamble OFDM symbols. | 04-19-2012 |
20120257669 | DATA PROCESSING METHOD, EQUALIZER AND RECEIVER - A data processing method, an equalizer, and a receiver in a wireless communication system including a relay station are provided. The data processing method includes: receiving a base station signal from a base station; receiving a relay station signal from a relay station; determining a propagation delay between the base station signal and the relay station signal; generating an equalizing signal in which interference generated between the base station signal and the relay station signal is alleviated in consideration of the propagation delay; and recovering information bits transmitted by the base station from the equalizing signal. According to an exemplary embodiment of the present invention, it is possible to alleviate performance deterioration due to an interference problem generated in a relay system. | 10-11-2012 |
20120269248 | METHOD AND APPARATUS OF DETECTING SIGNAL BASED ON MINIMUM MEAN SQUARE ERROR IN MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A receiver in a multiple-input multiple-output (MIMO) system is provided. The receiver includes a channel estimator estimating a channel based on a receiving signal, a minimum mean square error (MMSE) based reciprocal log likelihood ratio (R-LLR) calculator connected with the channel estimator and calculating an R-LLR based on the receiving signal and the estimated channel, and a channel decoder connected with the MMSE based R-LLR calculator and decoding the channel and the receiving signal based on the calculated R-LLR, wherein the R-LLR is calculated based on the reciprocity. | 10-25-2012 |
20120269251 | METHOD AND APPARATUS FOR ESTIMATING SIGNAL TO NOISE RATIO IN WIRELESS COMMUNICATION SYSTEM - There is provided a method and apparatus for estimating a signal to noise ratio (SNR) in a wireless communication system. The apparatus selects a preamble signal for each of a plurality of sectors from a reception signal experienced by fast Fourier transform (FFT), outputs a correlation signal by performing a correlation between the preamble signal for each sector and a preamble reference signal, estimates power of the reception signal and noise power for each sector based on the correlation signal, selects a minimum value from among the noise powers for the sectors, outputs a net power for each sector by subtracting the minimum value from the power of the reception signal for each sector, and calculates the SNR by dividing the net power for each sector by the minimum value. | 10-25-2012 |
20130003897 | METHOD AND APPARATUS FOR DEMODULATING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - There is provided a method and apparatus in which a user equipment demodulates a downlink signal in a wireless communication system. The user equipment receives a first orthogonal frequency division multiplexing (OFDM) signal from a first node serving the mobile station, receives a second OFDM signal from a second node different from the first node, and demodulates the first OFDM signal and the second OFDM signal in a fast Fourier transform (FFT) section. The first OFDM signal and the second OFDM signal are either normal mode signals each having a first cyclic prefix (CP) or cooperative mode signals each having a second CP, and the second CP has a longer length than the first CP. | 01-03-2013 |
20130044684 | APPARATUS AND METHOD FOR CONTROLLING COMMUNICATION PATH BETWEEN MULTIPLE DIGITAL UNITS AND MULTIPLE RADIO FREQUENCY UNITS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a communication path control apparatus for controlling a communication path between a plurality of DUs and a plurality of RFUs, and a plurality of antennas included in the plurality of RFUs and a wireless communication system including the communication path control apparatus. Each of the plurality of DUs, the plurality of RFUs, and the plurality of antennas has a unique identifier, and the path control apparatus controls paths between the plurality of DUs and the plurality of RFUs based on identifiers. Accordingly, the wireless communication system can transmit and receive a signal through a specific RFU and a specific antenna included in a specific RFU and performs the next-generation wireless BS operation method, such as CoMP and multi-BS MIMO. | 02-21-2013 |
20140106807 | CENTRAL NODE APPARATUS AND METHOD FOR TRANSMITTING WIRELESS SIGNALS BETWEEN CENTRAL OFFICE NODE AND REMOTE NODE USING BEAM PATTERNS AND ANTENNA POLARIZATION - A central office node using beam patterns and antenna polarizations, a remote node, and a wireless communication method between the nodes. The central office node includes: a first antenna array with first polarization attributes; a second antenna array with second polarization attributes; and a transmitter unit configured to transmit data to a plurality of remote nodes using beam patterns generated during beamforming and the polarization of the first and second antenna arrays. | 04-17-2014 |
20140160917 | DEVICE FOR GENERATING RANGING SIGNAL OF WIRELESS COMMUNICATION SYSTEM AND METHOD OF GENERATING RANGING SIGNAL OF WIRELESS TERMINAL - There are provided a method of generating a ranging signal of a wireless terminal and a device for generating a ranging signal of a wireless communication system that can generate the ranging signal using one IFFT engine independently from a mode of the ranging signal transmitted in uplink in a wireless communication system in which a frequency interval of subcarriers used to generate an initial ranging signal and a frequency interval of subcarriers using periodic ranging are different. In this way, it is possible to decrease complexity of hardware and design of the wireless terminal, and decrease power consumption of the wireless terminal through hardware simplification. | 06-12-2014 |
20140161215 | DEVICE AND METHOD FOR ESTIMATING CARRIER FREQUENCY OFFSET OF OFDM SIGNALS TRANSMITTED AND RECEIVED THROUGH PLURALITY OF POLARIZED ANTENNAS - Provided are a device and method for estimating carrier frequency offset of OFDM signals transmitted and received through a plurality of polarized antennas that may accurately estimate carrier frequency offset used for carrier frequency synchronization acquisition when there is interference between polarized waves. | 06-12-2014 |
20140187278 | PREAMBLE TRANSMISSION DEVICE OF MULTI-MODE SUPPORTING BASE STATION AND PREAMBLE DETECTING DEVICE OF MULTI-MODE SUPPORTING USER TERMINAL - Provided are a preamble transmission device of a multi-mode supporting base station and a preamble detecting device of a multi-mode supporting user terminal. Selecting of the preamble signal is driven by the user terminal capable of supporting multi-modes, which contributes to smooth services from a user's viewpoint, and to effective use of the limited radio resources from an operator's viewpoint. | 07-03-2014 |
20140254503 | SIGNAL DETECTOR FOR UPLINK CONTROL CHANNEL AND TIME ERROR CORRECTION METHOD THEREOF - Provided are a signal detector for an uplink control channel and a time error correction method capable of simply correcting time errors, which occur during adjustment of a starting point of an FFT of an uplink control channel signal, by use of differential demodulation and thus improving the signal detection performance of an uplink control channel. | 09-11-2014 |