| Patent application number | Description | Published |
|---|
| 20080205537 | Method For Selecting Optimal Beam And Apparatus For Receiving Digital Broadcasting Signal Using The Same - There are provided a method for selecting an optimal beam to improve digital broadcasting receiving performance, and a digital broadcasting receiving apparatus using the same. The method includes the steps of: a) calculating a mainpath Signal to Multipath signal and Noise Ratio (SMNR) based on a channel impulse response for a plurality of beams which are formed according to steering directions from output signals of antennas, wherein the output signal of each antenna has different phase shift according to location of antenna element; b) selecting a predetermined number of beams having a high SMNR value by comparing the calculated SMNR value for respective beam; c) calculating a mainpath Signal to Dominant Multipath signal Ratio (SDMR) based on a channel impulse response corresponding to the selected beam; and d) selecting a beam output signal having the biggest SDMR value by comparing SDMR values calculated in selecting a predetermined number of beams. | 08-28-2008 |
| 20100034539 | APPARATUS FOR SYNCHRONIZING CLOCK IN REAL-TIME LOCATING SYSTEM AND METHOD THEREFOR - A highly precise clock synchronization apparatus in a real-time locating system (RTLS), includes an optical transmitting/receiving unit for receiving a clock information frame from a clock synchronization server, converting the received clock information frame in series-parallel, and transmitting/receiving the clock information data and the clock information; an offset estimation unit for detecting a preamble signal and a clock information signal from the series-parallel converted clock information frame, calculating a phase difference value by comparing the detected preamble signal with the detected clock information signal, and outputting an offset value based on the calculated phase difference value; and a clock synchronization unit for updating a local clock value to a time of the clock synchronization server based on the offset value and the clock information frame. | 02-11-2010 |
| 20100113049 | METHOD AND DEVICE FOR MANAGEMENT OF FEMTO BASE STATION - A method for management of a base station according to the present invention includes: entering a first interval when a terminal is not present in a region of a first cell managed by the base station; receiving an interval switching request when the terminal enters a second cell that is larger than the first cell while including the first cell; and switching into a second interval other than the first interval in accordance with the interval switching request. | 05-06-2010 |
| 20100246531 | METHOD FOR TRANSMITTING SIGNALS - A signal receiving method includes allocating a communication resource corresponding to a mobile station over a plurality of frames, transmitting allocation information on the communication resource to the mobile station, and receiving a transmitted signal through the communication resource. Therefore, the resource allocated on the frequency axis is minimized by allocating the resource to the mobile station over a plurality of frames, and the resource is allocated within the limited power of the mobile station, thereby improving radio performance. | 09-30-2010 |
| 20100271941 | METHOD OF CHANGING FREQUENCY ASSIGNMENT STATUS IN BROADBAND WIRELESS ACCESS SYSTEM - The present invention relates to a method of changing a frequency assignment (FA) status in an improved broadband wireless access system where terminals and base stations can communicate with each other by using a plurality of FAs. In the present invention, the base station changes the status of one of secondary FA into the status of the pFA in order to adjust a load of the primary FA, and communicates with the terminal through the pFA of which status is changed. For this purpose, the base station transmits a MAP information element (IE), which requests the change of the status of the pFA, to the terminal. The MAP IE includes an action code that requests the change of the status of the pFA, and a bit map representing an FA of which status is to be changed. When a response, which represents the completion of the change of the status of the pFA of the base station, is received from the terminal, the base station changes the status of the pFA and communicates with the pFA of the terminal through a new pFA. The status of a previous pFA between the base station and the terminal is changed into the status of the sFA, and the status of one previous sFA between the base station and the terminal is changed into the status of the pFA, so that communication is performed through new FAs. According to the present invention, since the base station can change the status of a specific terminal and FAs in use according to need, it is possible to adjust loads between the FAs. Further, the base station can change the statuses of the FAs in use while continuously maintaining the access of a specific terminal. | 10-28-2010 |
| 20100277568 | METHOD AND APPARATUS FOR STEREOSCOPIC DATA PROCESSING BASED ON DIGITAL MULTIMEDIA BROADCASTING - A stereoscopic data processing method and apparatus to provide service of stereoscopic data interoperating with digital multimedia broadcasting (DMB) is provided. The stereoscopic data processing method, including: receiving a transmission stream (TS) including a program map table from an external device; recognizing stereoscopic program information descriptor in the program map table; and recognizing defined bit values in the stereoscopic program information descriptor and processing data. | 11-04-2010 |
| 20100284332 | METHOD FOR TRANSMITTING AND RECEIVING DATA IN MULTI CARRIER WIRELESS ACCESS SYSTEM - There is provided a method in which a base station transmits downlink data in a wireless access system supporting multi-carriers. The method comprising negotiating with a terminal about a sleep mode parameter including information on a sleep window and a listening window, if the terminal is operating in a sleep mode, transmitting information on a carrier used for data transmission among the multi-carriers to the terminal through at least one of a medium access control (MAC) header, a MAC control message, and a control channel and transmitting data to the terminal based on the information during the listening window. Accordingly, waste of radio resources can be prevented by making efficient use of the multi-carriers even though the terminal is operating in the sleep mode. | 11-11-2010 |
| 20100285831 | METHOD OF PERFORMING HANDOVER IN MULTI CARRIER WIRELESS ACCESS SYSTEM - There is provided a method for handover of a terminal in a wireless access system using multi-carrier operation. The method comprises: receiving a handover command message from a serving base station; and performing network reentry to a target base station based on the handover command message, wherein the handover command message includes information required for handover to the target base station and information on whether the target base station supports handover using multi-carriers. Accordingly, it is possible to efficiently perform the handover in the wireless access system supporting the multi-carriers. | 11-11-2010 |
| 20100315486 | STEREOSCOPIC VIDEO SERVICE PROVIDING/RECEIVING METHOD AND APPARATUS IN DIGITAL BROADCASTING SYSTEM - Provided is a stereoscopic video service providing method using a stereoscopic video stream including first and second video streams in a digital broadcasting system. The stereoscopic video service providing method includes: generating information on the first video stream and information on the second video stream; inserting an identifier of the information on the second video stream into the information on the first video stream; and transmitting the first video stream and the information on the first video stream and the second video stream and the information on the second video stream through separate transmission channels, respectively. | 12-16-2010 |
| 20110010739 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING STEREOSCOPIC VIDEO IN DIGITAL BROADCASTING SYSTEM - Provided is a method for transmitting a stereoscopic video in a digital broadcasting system, the stereoscopic video being composed of a left view and a right view. The method includes: generating information indicating that the video is stereoscopic, information about a composition type of the stereoscopic video, and additional information based on the composition type; and transmitting the stereoscopic video and the generated information. The composition type is to compose the stereoscopic video of a single or two encoding streams by using the left view and the right view. In the case of a single stream mode in which the stereoscopic video is composed of the single encoding stream, the additional information includes information about positions of the left and right views. In the case of a dual stream mode in which the stereoscopic video is composed of the two encoding streams, the additional information includes information indicating whether the respective encoding streams are the left view or the right view and information indicating correlation between the respective encoding streams. | 01-13-2011 |
| 20110050857 | APPARATUS AND METHOD FOR DISPLAYING 3D IMAGE IN 3D IMAGE SYSTEM - Disclosed is an apparatus and a method for displaying 3D images, which do not need to be reversed, so that users can watch the 3D images without modification in a 3D image system. The 3D images display extracts characteristic information regarding a plurality of imaging devices from left and right images taken by the imaging devices, selects an image among the left and right images, determines a reference element in the selected image, determines a selection element corresponding to the reference element in the non-selected image; calculates a disparity value between the left and right images by using the reference element and the selection element, determines whether the left and right images are normal or not by using the disparity value, and corrects the left and right images based on the determination result. | 03-03-2011 |
| 20110105129 | FEMTOCELL SEARCH METHOD FOR MACRO TO FEMTO HANDOVER - The present invention relates to a femtocell search method for a handover from a macrocell to a femtocell. The present invention relates to a method for a terminal that accesses a macrocell to search a femtocell in an environment where a plurality of femtocells are overlapped in one macrocell. The terminal searches a femtocell by using a dummy preamble in order to minimize the size of neighbor cell lists broadcasted from the macrocell to the terminal. Therefore, according to the present invention, an MAC overhead can be minimized by eliminating neighbor femtocell lists in a mobile neighbor advertisement (MOB_NBR_ADV) message broadcasted from the macrocell, and the terminal can search a femtocell with a minimum scanning load by checking only a femtocell dummy preamble in a dedicated symbol of the macrocell. | 05-05-2011 |
| 20110126037 | POWER SAVING METHOD IN MOBILE COMMUNICATION NETWORK - Provided is The present invention provides a method to dynamically control the sleep window or the listening window of a sleep mode in order to minimize power consumption of a mobile terminal. The power saving method relates to a method for a transmitter of a communication system that controls data transmission to a listening window and a sleep window to control the sleep window, wherein if the data transmission is generated during the listening window, the transmitter gradually decreases a sleep window subsequent thereto by a predetermined ratio, and to the contrary, if the data transmission is not generated during the listening window, the transmitter gradually increases a sleep window subsequent thereto by a predetermined ratio. | 05-26-2011 |
| 20110141364 | METHOD AND APPARATUS FOR RECEPTION AND TRANSMISSION - Disclosed is a reception apparatus including a basic service reception unit to demodulate and channel-decode a signal received through one broadcasting channel among broadcasting channels for a basic service, and to extract a transport stream, an additional service reception unit to demodulate and channel-decode a signal received through a broadcasting channel for an additional service combined with the basic service, and to extract a transport stream, an integrated demultiplexer to respectively demultiplex the transport stream provided for the basic service and the transport stream provided for the additional service in order to extract at least one transport stream, and a source decoder to respectively decode the demultiplexed transport stream provided for the basic service and the demultiplexed transport stream provided for the additional service in order to broadcast at least one of a basic source and an additional source combined with the basic source. | 06-16-2011 |
| 20110158169 | METHOD OF TRANSMITTING CONTROL INFORMATION IN MOBILE COMMUNICATION SYSTEM AND METHOD OF ACKNOWLEDGING THE CONTROL INFORMATION - A method of acknowledgment by a receiver includes: receiving a control message via a payload of a medium access control protocol data unit (MAC PDU) from a transmitter or receiving control information through an extended header or signaling header of the MAC PDU; and transmitting an acknowledgment of the control message or control information through an acknowledgment extended header containing information about whether the acknowledgment is an acknowledgment of the control message or an acknowledgment of the control information. | 06-30-2011 |
