Patent application number | Description | Published |
20090022063 | APPARATUS AND METHOD FOR RETRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for selectively retransmitting data according to a channel state in a wireless communication system are provided. The method includes determining retransmission information of a receiver from feedback information received from the receiver, determining a retransmission scheme for the receiver using the retransmission information of the receiver, and performing a retransmission process with the receiver according to the determined retransmission scheme. In a good channel state, the data is retransmitted using the retransmission scheme to thereby enhance the reliability of the data delivery and the reception performance. In a bad channel state, the data is not retransmitted to thereby reduce a waste of resources in the data retransmission. | 01-22-2009 |
20110149821 | METHOD AND SYSTEM FOR MANAGING AN INACTIVE INTERVAL OF A BASE STATION - A method and system for managing an inactive interval of a Base Station (BS) are provided, in which the BS transmits a preferred Low-Duty Mode (LDM) pattern to a coordination server that manages LDM patterns of BSs, receives an LDM pattern from the coordination server, the LDM pattern being determined for the BS by the coordination server, taking into account the preferred LDM pattern and LDM patterns of neighbor BSs, and operates in an active interval and an inactive interval according to the received LDM pattern. | 06-23-2011 |
20110216683 | APPARATUS AND METHOD FOR REDUCING INTERFERENCE AND SAVING ENERGY IN FEMTO/PICO CELL OF HIERARCHICAL CELL STRUCTURE - An apparatus and a method manage power of a small base station. Whether a notify message indicating that a subscribed terminal enters a macro base station that includes an off-small base station is received from the macro base station under a closed access mode is determined. When the notify message is received, whether a service is providable to the subscribed terminal is determined. When the service is providable to the subscribed terminal, the small base station is turned on. During the closed access mode or when a load of a macro cell is large during an open access mode, when a terminal that should be serviced does not exist in the neighborhood of a small base station, an interference and power consumption unnecessarily generated may be reduced by turning off the small base station. | 09-08-2011 |
20110222418 | APPARATUS AND METHOD FOR REDUCING ENERGY CONSUMPTION IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for controlling an Energy Saving (ES) mode at a base station of a wireless communication system are provided. The method for controlling the ES mode includes predicting a traffic load of a next time, determining whether to enter the ES mode using the predicted traffic load, when determining to enter the ES mode, determining reliability of the predicted traffic load, and when the predicted traffic load is reliable, operating in the ES mode. | 09-15-2011 |
20110249651 | APPARATUS AND METHOD FOR SUPPORTING COOPERATIVE HANDOVER IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for supporting a cooperative handover in a broadband wireless communication system. A method for operating a mobile station (MS) for a cooperative handover in a broadband wireless communication system includes determining a handover to a target BS and omitting a CID update process of the MS during the handover process to the target BS, wherein the CID of the MS is shared beforehand between a serving BS and the target BS. | 10-13-2011 |
Patent application number | Description | Published |
20090317150 | IMAGE FORMING APPARATUS AND TRANSFER DEVICE THEREOF - An image forming apparatus and a transfer device thereof are disclosed. The transfer device includes an intermediate transfer belt, at least one intermediate transfer belt roller to maintain tension in the intermediate transfer belt, transfer rollers to press the intermediate transfer belt to image carriers and a state changing device to change an operating state between at least a first state, in which the tension in the intermediate transfer belt is released, and a second state, in which select ones of the transfer rollers are separated from the intermediate transfer belt. | 12-24-2009 |
20130108320 | IMAGE FORMING APPARATUS | 05-02-2013 |
20140119760 | IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF - Disclosed herein are an image forming apparatus and a control method thereof. The image forming apparatus includes a plurality of photoconductors, a transfer belt, a plurality of transfer rollers arranged in parallel with the plurality of photoconductors, and a controller rotating the transfer belt under the condition that at least one of the plurality of transfer rollers presses the transfer belt toward at least one of the plurality of photoconductors, interrupting power transmitted to the transfer belt to cause at least another of the plurality of transfer rollers to press the transfer belt toward at least another of the plurality of photoconductors, standing by until rotation of the transfer belt is stopped, after interruption of the power, and controlling the at least another of the plurality of transfer rollers so as to press the transfer belt toward the at least another of the plurality of photoconductors. | 05-01-2014 |
20140294453 | IMAGE FORMING APPARATUS - An image forming apparatus is provided. The image forming apparatus, in a case in which a toner on a transfer belt is checked through a sensing unit, is capable of preventing a rotation of a guide roller, which is configured to guide the transfer belt, by use of a regulation device, so that a check error occurring due to vibration of the guide roller is reduced. Thus, the toner on the transfer belt is checked with increased accuracy and precision. | 10-02-2014 |
20150055982 | IMAGE FORMING APPARATUS - An image forming apparatus including a side cover rotatably installed to open and close an opening provided at a body thereof while rotating, a first transfer unit to which a visible image of photoconductors of developing units is transferred, and a second transfer unit movably installed at the side cover to transfer the visible image to a printing medium, wherein the second transfer unit is provided at both sides thereof with a plurality of guide protrusions to perform a position restriction, and the body is provided at both sidewalls of inside thereof with a plurality of guide members to support the plurality of guide protrusions such that the second transfer unit is supported against both sidewalls of the inside of the body through the guide protrusion and the guide member, thereby reducing a reaction force applied to the side cover. | 02-26-2015 |
Patent application number | Description | Published |
20090258261 | FUEL CELL SYSTEM AND METHOD OF CONTROLLING THE SAME - A fuel cell system and a control method thereof are capable of preventing anode flooding due to a temperature difference between a stack and reformate upon starting a fuel cell system. The method of controlling a fuel cell system including steps of detecting a temperature of a fuel cell stack, detecting a temperature of reformate that is generated in a fuel reformer and then is supplied to the fuel cell stack through a heat exchanger, and setting the temperature of the reformate to be lower than the temperature of the fuel cell stack during a starting time of the fuel cell system. | 10-15-2009 |
20090258265 | Fuel supply device for fuel cell and fuel cell system using the same - A fuel supply device for a fuel cell and a fuel cell system using the same that prevent H | 10-15-2009 |
20100164354 | METHOD OF MANUFACTURING ELECTROMAGNETIC INTERFERENCE (EMI) SHIELDING FILTER FOR PLASMA DISPLAY PANEL AND EMI SHIELDING FILTER FOR PLASMA DISPLAY PANEL USING THE SAME - A method of manufacturing an electromagnetic wave shield for a plasma display panel having a first panel having an image-displaying surface, the method including coating the image-displaying surface of the first panel with a coating solution to form a hydrophobic layer; applying a conductive ink to the hydrophobic layer utilizing an ink-jet applicator to form a pattern of the conductive ink; and heating the conductive ink and the hydrophobic layer to form a conductive mesh pattern on the hydrophobic layer. | 07-01-2010 |
20100207979 | INKJET DRIVING CIRCUIT - An inkjet driving circuit capable of controlling the amount of ink discharged from nozzles by adjusting rising and falling slopes of head driving voltage through a digital variable resistor. The inkjet driving circuit includes a digital variable resistor adjusting rising and falling slopes of a head driving voltage outputted to an output terminal, a first transistor electrically coupled between the digital variable resistor and the output terminal and operating in response to a first pulse, and a second transistor electrically coupled to the output terminal and the first transistor and operating in response to a second pulse. | 08-19-2010 |