Patent application number | Description | Published |
20080207214 | Apparatus and method for allocating uplink radio resource in wideband wireless communication system - An apparatus and method for UpLink (UL) radio resource allocation in a wideband wireless communication system are provided. In a method of operating a Relay Station (RS) for UpLink (UL) radio resource allocation in a wideband wireless communication system, the method includes relaying to a Base Station (BS) a resource request message of at least one or more Mobile Stations (MSs); receiving data from the at least one or more mobile stations; if the received data is non-real time traffic, queuing the data received from the mobile stations according to a traffic type; and requesting the base station to allocate necessary radio resources by checking a queue status. Accordingly, a delay can be reduced when the UL resource is allocated to an relay station for real time traffic. | 08-28-2008 |
20080233989 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING CHANNEL QUALITY INFORMATION IN A COMMUNICATION SYSTEM - An apparatus and method for transmitting/receiving a Channel Quality Information (CQI) in a communication system are provided. A Mobile Station (MS) receives first information indicating a representative MS selected from a group of MSs located within a preset range and in similar channel statuses, the group including the MS, determines from the first information whether the MS is designated as the representative MS, and transmits a CQI of the MS as a representative CQI of the MSs included in the group to a Base Station (BS), if the MS is designated as the representative MS. | 09-25-2008 |
20080240009 | SYSTEM AND METHOD FOR DATA TRANSMISSION/RECEPTION IN A COMMUNICATION SYSTEM - Disclosed is a system and method for transmitting data based on an operational state of a mobile station in a communication system. The method includes, when detecting a low battery state of the mobile station, storing one or more data packets to be transmitted to the mobile station, extracting at least one data packet, which has a transmission delay time larger than a difference between a maximum delay time and preset margin, from the one or more stored data packets, and transmitting at least a part of the extracted at least one data packet to the mobile station by using a resource allocated to the mobile station. | 10-02-2008 |
20080242291 | Method and system for transmitting/receiving data in communication system - Disclosed is a method and system for transmitting and receiving data in a communication system. The system includes a base station, and a relay station connecting the base station with at least one mobile station. The base station transmits data for a plurality of mobile stations to the relay station, and transmits the data to at least one mobile station belonging to the base station from among the plurality of mobile stations. The relay station receives the data from the base station, and transmits the data to at least one mobile station belonging to the relay station from among the plurality of mobile stations in the same interval as an interval where the base station transmits the data to the mobile station. | 10-02-2008 |
20090022112 | METHOD AND APPARATUS FOR NOTIFYING STATUS OF MOBILE NODE IN A WIRELESS LOCAL AREA NETWORK SYSTEM USING VISIBLE LIGHT COMMUNICATION - A method and apparatus for notifying status of an MN in a WLAN system using VLC are provided, in which an AP allocates a first predetermined number of time slots per frame as unallocated slots, for status notification of an initially accessing MN and allocates a second predetermined number of time slots per frame as reserved slots, for status notification of an initially accessing MN and uplink data transmission of an MN, and the MN transmits a visible light signal carrying status information about the MN in one of an unallocated slot and a reserved slot, if the MN initially accesses the AP. | 01-22-2009 |
20090073952 | METHOD AND APPARATUS FOR RETRANSMITTING DATA IN WIRELESS LAN SYSTEM USING VISIBLE LIGHT COMMUNICATION - A method for retransmitting data when data transmission/reception has failed in a wireless LAN system using visible light communication. A mobile node searches a received frame for a fast feedback slot allocated for retransmission information when momentary data transmission/reception failure has occurred. One mini-slot from among the plurality of mini-slots is selected from the fast feedback slot. The mobile node transmits a fast feedback message, including information for retransmission, to an access point by using the selected mini-slot. | 03-19-2009 |
20090274081 | DEVICE TO SENSE FREQUENCY BAND TO SHARE OPERATING FREQUENCY BANDS IN HETEROGENEOUS COMMUNICATION SYSTEMS AND METHOD THEREOF - A cognitive radio communication device and method are provided. The cognitive radio communication device includes a reception unit to receive reference signals from a first communication device, a frequency division unit to divide operating frequency bands of the first communication device into a plurality of sub frequency bands, a first sensing unit to sense each of the plurality of sub frequency bands using the reference signals to estimate whether the first communication device uses each of the plurality of sub frequency bands, and to determine an unused frequency band group including at least one sub frequency band not used by the first communication device based on the estimated result, and a transmission unit to transmit data to a second communication device using the sub frequency band included in the unused frequency band group. | 11-05-2009 |
20090304110 | COGNITIVE RADIO COMMUNICATION SYSTEM USING MULTIPLE INPUT MULTIPLE OUTPUT COMMUNICATION SCHEME - A cognitive radio communication system using a multiple input multiple output (MIMO) communication technology is provided. A cognitive radio base station includes a plurality of antennas, a group setting unit to set at least one sensing terminal group that includes at least one sensing terminal among a plurality of terminals, and a signal generator to generate a transmission signal to transmit the transmission signal using channels formed between the plurality antennas and the plurality of terminals, so that the at least one sensing terminal is accorded a sensing time. | 12-10-2009 |
20090323603 | BASE STATION FOR EXCHANGING FREQUENCY BANDS - An apparatus and method for exchanging frequency bands used by a plurality of base stations are provided. A base station for exchanging frequency bands includes a receiving unit to receive first quiet time duration information of an adjacent base station, a frequency band measuring unit to determine first frequency band measuring information with respect to a first frequency band used by the adjacent base station based on the first quiet time duration information, a frequency band exchange-determining unit to determine whether to exchange frequency bands with each other based on the first frequency band measuring information, and a transmitting unit to transmit data to a terminal using the first frequency band according to the determined result. | 12-31-2009 |
20100009695 | COMMUNICATION SYSTEM TO PERFORM LENDING AND/OR BORROWING OF A RADIO RESOURCE - A wireless communication system, and more particularly, a base station apparatus to lend an idle resource to another base station or to borrow an idle resource from another base station is provided. A borrowing base station apparatus includes a transmitter to transmit an idle resource borrowing message to a lending base station, and a receiver to receive, from the lending base station in response to the idle resource borrowing message, an idle resource lending message including information regarding whether to lend an idle resource of the lending base station, such that the transmitter transmits data to a terminal using the idle resource. The borrowing base station may borrow an idle resource from the lending base station to use the borrowed idle resource to perform data transmission. | 01-14-2010 |
20100178452 | Polymer Substrate for Flexible Display Having Enhanced Flexibility - Disclosed herein is a polymer substrate for a flexible display, comprising a reticular superelastic alloy structure and/or an annular superelastic alloy structure therein. The polymer substrate has an improved flexibility because the superelastic alloy structure is embedded therein. | 07-15-2010 |
20100272065 | DATA FORWARDING APPARATUS AND METHOD FOR REDUCING HANDOVER INTERRUPTION TIME IN A WIRELESS COMMUNICATION SYSTEM - A data forwarding apparatus and method for reducing a HandOver (HO) interruption time in a wireless communication system where a macro cell and a femto cell coexist are provided. An operation method of a Mobile Station (MS) for data forwarding in a wireless communication system includes synchronizing with a serving Base Station (BS) after completing a HO procedure with a target BS, and receiving data packets existing in a queue through an air link directly from the serving BS. | 10-28-2010 |
20110096736 | COMMUNICATION SYSTEM HAVING NETWORK ACCESS STRUCTURE - A communication system with an improved network access structure for inter-cell cooperation is provided. The communication system includes a central unit and at least one radio access unit. The at least one radio access unit may form at least one virtual cell by merging or separating cells of radio access units according to a distribution of terminals, statuses of channels, an amount of traffic, and the like. | 04-28-2011 |
20110151872 | COMMUNICATION SYSTEM AND METHOD OF PERFORMING MULTI-CELL COMMON OPERATION - A common operating set including a plurality of cells may be set, and common radio resources may be allocated to enable the plurality of cells to perform a multi-cell common operation. Unique uplink radio resources may be allocated to each of terminals in the common operating set within the common radio resources, and each of the terminals may transmit corresponding uplink feedback information to a plurality of base stations based on corresponding unique uplink radio resources. Accordingly, each of the base stations may recognize information associated with a wireless environment between each of terminals and a corresponding base station. | 06-23-2011 |
20110306347 | COMMUNICATION METHOD OF MOBILE TERMINAL, PICO BASE STATION, AND MACRO BASE STATION IN HETEROGENEOUS NETWORK - A communication method of a macro base station serving a target mobile terminal in a macrocell including a picocell includes receiving information about an uplink interference of a pico base station in the picocell from the pico base station, and determining whether to perform a handover of the target mobile terminal to the pico base station based on an uplink interference of the macro base station and an uplink interference of the pico base station. | 12-15-2011 |
20120113838 | COMMUNICATION METHOD OF A MACRO BASE STATION, A VEHICULAR MOVING RELAY, AND A VEHICULAR MOVING TERMINAL - Provided are examples of methods of a vehicular moving relay in a communication system including the vehicular moving relay, a moving terminal, and a macro base station. Also provided is an example of a terminal. The vehicular moving relay may repeatedly transmit data to a vehicular moving terminal without requesting a handover from a macro base station to the vehicular moving relay, using a unique code that is allocated to the vehicular moving terminal from the macro base station. | 05-10-2012 |
20120129532 | METHOD AND SYSTEM FOR SUPPORTING HANDOVER BETWEEN MACRO BASE STATION AND VEHICULAR BASE STATION - Provided are a method and system for handing over a mobile terminal between a macro base station and a vehicular base station to secure a communication service of a movable mobile terminal in a wireless communication system supporting a vehicular base station such as a vehicular relay station. The mobile terminal may be handed over by selecting a network or a vehicular base station suitable to a mobility and type of communication. | 05-24-2012 |
20120142345 | COOPERATIVE COMMUNICATION METHODS AND A DEVICE FOR A TARGET TERMINAL AND A COOPERATIVE TERMINAL - Provided is a cooperative communication technology of a target terminal and a cooperative terminal. In an environment in which interference exists between cells, cooperation between terminals may be performed in order to improve quality of signals that are received from a base station. | 06-07-2012 |
20120157139 | COMMUNICATION METHOD OF NEIGHBORING TERMINAL AND TARGET TERMINAL - Provided is a communication method of a neighboring terminal and a target terminal in which a cooperative terminal that has a better SINR or a better channel condition provides help to a target terminal through cooperation between terminals based on a random access mode or a scheduling mode, so that an SINR of the target terminal is improved without help from a base station. | 06-21-2012 |
20130020161 | POWER SUPPLY AND ACQUISITION APPARATUS FOR ON-LINE ELECTRIC VEHICLE - A power supply and acquisition apparatus for an electrical vehicle includes a power supply device embedded along a road and a power acquisition device attached on the vehicle. The power supply device includes a plurality of power supply core units, each core unit having two opposite magnetic poles and formed in a direction perpendicular to a longitudinal direction of the road; and one or more power supply lines disposed along the longitudinal direction such that adjacent two magnetic poles have different polarities. The power acquisition device includes power acquisition core units; a connection member for connecting the power acquisition core units such that the power acquisition core units are spaced from each other by a distance between the magnetic poles; and a power acquisition coil wound around the respective power acquisition core units or the connection member. | 01-24-2013 |
20130057060 | DEVICE FOR CANCELING UNDESIRABLE MAGNETIC FIELD AROUND ON-LINE ELECTRIC VEHICLE, METHOD OF MANUFACTURING THE SAME, AND ON-LINE ELECTRIC VEHICLE CAPABLE OF CANCELING UNDESIRABLE MAGNETIC FIELD - A method, for manufacturing a device for canceling an undesirable magnetic field around an on-line electric vehicle, the method comprising, calculating a primary magnetic field generated by a current flowing through a power line, calculating a first undesirable magnetic field, calculating a second undesirable magnetic field, obtaining an entire undesirable magnetic field by calculating a vector sum of the first and second undesirable magnetic fields, obtaining a number of turns of a coil to be wound around one end or both ends of the power acquisition device which maximally cancels the entire undesirable magnetic field, and winding the coil around the end or ends of the power acquisition device in accordance with the obtained number of turns, and short-circuiting each coil. | 03-07-2013 |
20130092491 | POWER SUPPLY APPARATUS FOR ON-LINE ELECTRIC VEHICLE, METHOD FOR FORMING SAME AND MAGNETIC FIELD CANCELATION APPARATUS - A power supply apparatus is for supplying power to an electric vehicle by a magnetic induction mechanism. The apparatus includes a power supply structure including a multiple number of power supply rail modules connected in a forward road direction, each power supply rail module including at least one power supply line passage elongated in the forward road direction, a power supply core of a lattice structure provided below the power supply line passage, and a concrete structure incorporating the power supply line passage and the power supply core; at least one power supply line accommodated in the power supply line passage in the forward road direction and surrounded by an insulating pipe; and at least one common line provided in the forward road direction and surrounded by an insulating pipe, for supplying power to the power supply apparatus. | 04-18-2013 |
20130098723 | METHOD AND APPARATUS FOR TRANSPORTING POWER TO ELECTRIC VEHICLE WITH SEGMENTS OF POWER SUPPLY ROAD - A power transport apparatus for transporting electric power to an electric vehicle on the road is provided. The apparatus includes a plurality of power supply units provided at a road in a longitudinal direction of the road, one or more of the power supply units simultaneously transporting the electric power to the electric vehicle; and a power line supplying the electric power to the respective power supply units. | 04-25-2013 |
20130098724 | MODULAR ELECTRIC-VEHICLE ELECTRICITY SUPPLY DEVICE AND ELECTRICAL WIRE ARRANGEMENT METHOD - The present invention relates to a modular electric-vehicle electricity supply device and an electrical wire arrangement method, and more particularly, to an electric-vehicle electricity supply device and electrical wire arrangement method which use a modular approach such that respective modules can be controlled so as to be either ON or OFF; in which a plurality of a magnets disposed at right angles to the direction of travel on a road area provided spaced at predetermined intervals in the direction of travel on the road, and which comprises electricity supply cores formed such that the widths at right angles to the direction of travel on the road are very narrow, and comprises electricity supply wires arranged such that the magnets of electricity supply cores which neighbor each other in the direction of travel on the road have different polarities. | 04-25-2013 |
20130119762 | LOAD-SEGMENTATION-BASED FULL BRIDGE INVERTER AND METHOD FOR CONTROLLING SAME - Disclosed are a full bridge inverter and method for controlling same. The full bridge converter according to the present invention comprises: a plurality of first switches connected at one end thereof to a positive terminal for a direct current (DC) input voltage; a plurality of second switches connected at one end thereof to a negative terminal for a DC input voltage; and a plurality of loads connected at connection terminals formed by one-on-one connections of the opposite ends of each first switch to the opposite ends of each second switch. Thus, in cases requiring the selective application of voltages converted from DC to AC to the plurality of loads, the number of semiconductor devices can be minimized to reduce costs, and a reduction in load current can be prevented. | 05-16-2013 |
20130154353 | SPACE-DIVISION MULTIPLE POWER FEEDING AND COLLECTING APPARATUS - The present invention relates to a space-division multiple power feeding and collecting apparatus, and more specifically to a space-division multiple power feeding and collecting apparatus which is composed of multiple power feeding type lines using phase division, time division or frequency division and the like along a traveling direction of a moving body and receives electric power therethrough so as to feed the electric power to and to collect electric power from various moving bodies of a vehicle, and underwater moving body or a robot and the like in a non-contact manner. The present invention can obtain a constant output voltage through the minimization of a regular variation of an output voltage in the traveling direction of the moving body by applying the space-division multiple feeding method along the travelling direction of the moving body on an I-shaped feeding line, and increases an air gap by improving the mean output power to be transmitted to a secondary side and reducing the leakage flux generated between adjacent magnetic poles. | 06-20-2013 |
20130225189 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for transmitting and receiving a reference signal in a wireless communication system are provided. The method includes determining a cluster-specific reference signal configuration according a cluster configuration, transmitting information about the cluster-specific reference signal configuration, and transmitting cluster-specific reference signals of at least one cluster according to the cluster-specific reference signal configuration. | 08-29-2013 |
20130304443 | METHOD AND DEVICE FOR DESIGNING A CURRENT SUPPLY AND COLLECTION DEVICE FOR A TRANSPORTATION SYSTEM USING AN ELECTRIC VEHICLE - Provided is a method for designing a current supply device for wirelessly supplying power to a vehicle having a current collection device. In the design method, the gap between the two adjacent magnetic poles of the current supply device is received as input and then the gap between the current supply device and the current collection device is determined based on the gap between the two magnetic poles. Next, the magnitude of the power to be supplied to the current supply device is determined based on the value required with respect to the magnitude of the magnetic field and the gap between the current supply device and the current collection device. According to the design method, current supply device can easily be designed since various functional requirements are decoupled from each other. | 11-14-2013 |
20140064127 | RANGING METHOD AND APPARATUS IN WIRELESS COMMUNICATION SYSTEM - A ranging method and apparatus in a wireless communication system are provided. The ranging method of a Mobile Station (MS) includes selecting at least one Base Station (BS) for performing ranging, transmitting a ranging signal by using a common ranging region shared by a plurality of BSs, and receiving a response signal, including a ranging result of at least one BS which received the ranging signal, from a central controller. | 03-06-2014 |
20140073329 | APPARATUS AND METHOD FOR HANDOVER IN WIRELESS COMMUNICATION SYSTEM - A method for handover in a wireless communication system includes: when a received signal strength difference between a serving beam from a serving base station used for communication by a terminal and a target beam of a neighboring base station is equal to or greater than a first threshold value, and a received signal strength difference between an active beam and the target beam is equal to or greater than a second threshold value, determining a handover to the target beam; and transmitting a message to initiate the handover. | 03-13-2014 |
20140125286 | METHOD FOR CONTROLLING THE CHARGING OF SEGMENTS FOR AN ONLINE ELECTRIC VEHICLE - A method for controlling the charging of segments for an online electric vehicle is described. In some situations, the method comprises: (a) receiving, from segments, information on the speed and position of the vehicle entering the range of the power-supplying device; and (b) controlling the charging/discharging timing of the current segment from which the vehicle is leaving and the next segment into the range of which the vehicle is to enter, in accordance with the information on the speed and position of the vehicle. The charging/discharging response delay characteristics of the segments may be considered. | 05-08-2014 |
20140217829 | FERRITE CORE STRUCTURE FOR A POWER SUPPLY DEVICE OF AN ELECTRIC VEHICLE AND POWER SUPPLY ROAD STRUCTURE USING SAME - The present invention relates to a ferrite core structure for a power supply device of an electric vehicle which changes the structure of a ferrite core module according to a related art to improve output and limits a reduction in strength due to warpage in a traveling direction of the vehicle to prevent cracks generated in a surface of an intermediate portion of a power supply road from occurring. For this, the ferrite core structure for a power supply device of the electric vehicle includes: a plurality of horizontal core parts arranged spaced apart from each other to prevent a magnetic flux from leaking into the ground; a plurality of first vertical core parts extending upward from both ends of the horizontal core parts to prevent the magnetic flux from leaking into an outer surface; a second vertical core part having at least two rows extending upward from an intermediate portion of each of the horizontal core parts, the second vertical core part being arranged in a direction parallel to the first vertical core parts; and a first support part connecting the plurality of first vertical core parts to each other to support the first vertical core parts. | 08-07-2014 |
20140265628 | FEED LINE-COMPENSATED POWER TRANSMISSION APPARATUS - One embodiment of the present invention discloses a feed line-compensated power transmission apparatus. One embodiment of the present invention, comprises: a feed line provided with horizontally elongated first and second lines and a third line for connecting one end of the first line to one end of the second line; a pair of compensation capacitors which are placed to face each other by connecting one end of the compensation capacitor to the other end of the first line and one end of the other compensation capacitor to the other end of the second line; an input power source for applying a high frequency power source by connecting both ends of the input power source to the other ends of the pair of compensation capacitors, respectively. | 09-18-2014 |
20140295896 | METHOD AND APPARATUS FOR OPERATING IDLE MODE IN WIRELESS COMMUNICATION SYSTEMS - Provided is a method and apparatus for operating an idle mode in a wireless communication system. The method includes receiving a first message requesting entry to an idle mode from a Subscriber Station (SS) through at least one Base Station (BS), selecting in response to reception of the first message whether the MS is to enter an idle mode in which BSs belonging to a paging group broadcast a paging message for the MS or whether the MS is to enter a semi-idle mode in which BSs belonging to a semi-idle paging group, which is a subset of the paging group, broadcast the paging message for the SS, and transmitting Paging announce information instructing the BSs belonging to the semi-idle paging group to broadcast the paging message for the SS, if the semi-idle mode is selected. | 10-02-2014 |
20140319927 | POWER SUPPLY AND PICKUP SYSTEM CAPABLE OF MAINTAINING STABILITY OF TRANSMISSION EFFICIENCY DESPITE CHANGES IN RESONANT FREQUENCY - The present invention relates to a power supply and pickup system capable of maintaining stability of transmission efficiency despite changes in a resonant frequency. More particularly, the present invention relates to a power supply and pickup system capable of maintaining the stability of efficiency of transmitting power to a pickup device from a power supply device even when a voltage or current changes by the variation in a resonant frequency. According to the power supply and pickup system of the present invention, Q-factor of a power supply and pickup system is set to a low value, a stability of efficiency of transmitting power to a pickup device from a power supply device is maintained even when a voltage of current changes by the variation in a resonant frequency. | 10-30-2014 |
20150035481 | NON-CONTACT POWER TRANSMISSION DEVICE, MAGNETIC INDUCTION-TYPE POWER SUPPLY DEVICE, MAGNETIC INDUCTION-TYPE POWER COLLECTOR, AND MOVING OBJECT USING SAME - Embodiments of the present invention relate to a non-contact power transmission device, a magnetic induction-type power supply device, a magnetic induction-type power collector, and a moving object using same. Embodiments of the present invention provide a non-contact power transmission device, a magnetic induction-type power supply device, a magnetic induction-type power collector, and a moving object using same, the non-contact power transmission device comprising: a power collector having a power collector core, and a boob power collector cable that winds around the power collector core; and a power supply unit comprising a power supply core having a holder section and protrusions on the center portion of the holder section and around the perimeter of the holder section, and a power supply cable wound in such a manner that electric currents flow in two different directions with respect to the protruding center portion, wherein the power collector is located in the opposite direction from the protruding portion. | 02-05-2015 |