Patent application number | Description | Published |
20110078730 | METHOD AND APPARATUS FOR SCHEDULING RADIO ACCESS TO REDUCE CHANNEL ZAPPING DELAY - Provided is a method and apparatus for scheduling a radio access to reduce a channel zapping delay. The radio access scheduling method may receive abstract information with respect to all of currently receivable channels at each channel scheduling interval, and may receive the abstract information in advance and provide the abstract information when a channel change request is received, and thereby reduce the channel zapping delay. | 03-31-2011 |
20110143802 | PAGING MANAGEMENT METHOD AND SYSTEM FOR HOME EVOLVED BASE STATION - Provided is a paging management system that may transfer a paging message to only a small base station where a terminal is estimated to be positioned, and thereby decrease a traffic amount required to transfer the paging message. A paging management method may include: configuring a virtual tracking area by grouping a plurality of small base stations according to a position of a small base station accessed by a terminal; verifying a final small base station accessed by the terminal when a paging message is to be transmitted to the terminal; and transferring the paging message to small base stations of the virtual tracking area including the final small base station. | 06-16-2011 |
20110149913 | METHOD AND SERVING BASE STATION FOR DETERMINING HANDOVER TYPE, AND METHOD FOR HANDOVER BETWEEN BASE STATIONS IN WIRELESS MOBILE COMMUNICATION SYSTEM USING CARRIER AGGREGATION - Provided are a method and a base station for determining a handover type, and a method for handover between base stations in a wireless communication system using carrier aggregation. A serving base station may collect measurement information required to determine an optimal frequency band set from a neighboring base station and a user equipment. The serving base station may determine an optimal frequency band set for downlink handover and uplink hand over, and determine a type of the downlink handover and the uplink handover by performing data processing of the collected measurement information. | 06-23-2011 |
20110202590 | METHOD OF RANDOMIZING OPERATION START POINT IN TIME OF MACHINE TYPE TERMINAL IN MOBILE COMMUNICATION SYSTEM - Provided is a machine type communication terminal that may decrease load of a network and a server by performing an operation at different points in times. The machine type communication terminal may transmit data to the server via the network. A plurality of machine type communication terminals, the network, and the server may randomize operation start points in times of the machine type communication terminals in order to differentiate the operation start points in times. | 08-18-2011 |
20120165023 | MOBILITY MANAGEMENT METHOD FOR USE IN CELLULAR MOBILE COMMUNICATION SYSTEM - Disclosed is a mobility management method for use in a cellular mobile communication system. The mobility management method is configured to save radio resources and provide a stable service by detecting a cell in which a dwell time of user equipment (UE) is short as an island cell and performing a direct handover (HO) to an appropriate cell without handing over the UE to the island cell. There are provided three methods including a base station-based method, a UE measurement-based method, and a UE history-based method according to how to measure a dwell time in which the UE stays in a cell, a component in which obtained information is received within a network, and how to process an HO using the information. | 06-28-2012 |
20120165032 | METHOD OF CONTROLLING INTEFERENCE FROM FEMTO CELLS IN CONSIDERATION OF MACROCELL - A method of controlling femtocell interference considering a macrocell is provided. The method of controlling the interference includes a method of setting transmission power of the femtocell and methods of avoiding the interference of the femtocell. The methods of avoiding the interference include a PRB rotation method, a PRB transmission power restriction method, a hybrid method and a UB rotation method. The method of setting the transmission power and the methods of avoiding the interference may be implemented independently or implemented in combination with each other. Hence, according to the present invention, the femtocell itself can control the interference without affecting an interface of an existing macrocell base station and without signaling through the interface with the macrocell. | 06-28-2012 |
20160007243 | METHOD AND APPARATUS OF MOBILITY MANAGEMENT IN SMALL CELL ENVIRONMENT - The present invention relates to a wireless communication system that supports the mobility management in a small cell environment, the wireless communication system includes a user equipment configured to measure a signal strength of multiple small cells around and transmit the measurement result through a serving cell, and a multiple small base stations configured to store user equipment context information in determined preparation cells among the multiple small cells based on the measurement result, in case that the user equipment context information for cell A among the preparation cells is changed, wherein the multiple small base stations update the changed user equipment context information. | 01-07-2016 |
20160050649 | METHOD AND APPARATUS FOR MANAGING RESOURCE IN SMALL CELL ENVIRONMENT - Disclosed are a method and an apparatus for managing a resource in a small cell environment. The method for managing a resource in a small cell environment by a macro base station for controlling connection between user equipment (UE) and a gateway (GW), includes: configuring at least one packet path between the GW and the UE through a bearer of the macro base station; determining whether to add at least one small base station in the macro base station to the at least one packet path according to signal strength of the at least one small base station from the UE; and changing the at least one packet path using a bearer of a small base station based on the result. | 02-18-2016 |
Patent application number | Description | Published |
20130095415 | BLANKMASK AND PHOTOMASK USING THE SAME - Provided is a blankmask for a hardmask. In the blankmask, a hard film is formed by appropriately controlling contents of nitrogen and carbon therein to reduce a deviation in a critical dimension caused when an etch process is performed. A metal film is formed to a thin thickness by increasing a content of metal in a light-shielding film and reducing a content of metal in an anti-reflective film. Thus, resolution, pattern fidelity, and chemical resistance of the metal film may be improved. Also, the metal film and the hard film are formed such that a reflectivity contrast therebetween is high, thereby allowing the hard film to be easily inspected. Accordingly, the blank mask for a hardmask may be applied to a dynamic random access memory (DRAM), a flash memory, or a micro-processing unit (MPU) to have a half-pitch of 32 nm or less, and particularly, a critical dimension of 22 nm or less. | 04-18-2013 |
20150212403 | MASK BLANK, PHOTOMASK, AND METHOD FOR MANUFACTURING SAME - Provided are a method of manufacturing a photomask, in which a hardmask film pattern is used as an etch mask for etching a phase-shift layer under the hardmask film pattern, a blankmask, and a photomask using the blankmask. In the method, a resist film for patterning a hardmask film may be formed to a thin thickness, and the phase-shift layer may be etched using the hardmask film pattern having a high etch selectivity with respect to the phase-shift layer. Accordingly, an optical density may be maintained to be 3.0 due to use of a light-shielding film pattern, thereby increasing the resolution and precision of a pattern, reducing a loading effect, and improving critical dimension (CD) features, such as CD uniformity and CD linearity. | 07-30-2015 |
Patent application number | Description | Published |
20140356220 | WEAR RESISTANT AUSTENITIC STEEL HAVING SUPERIOR MACHINABILITY AND DUCTILITY, AND METHOD FOR PRODUCING SAME - There are provided a wear resistant austenitic steel having superior machinability and toughness in weld heat affected zones and a method for producing the austenitic steel. The austenitic steel includes, by weight %, manganese (Mn): 15% to 25%, carbon (C): 0.8% to 1.8%, copper (Cu) satisfying 0.7C-0.56(%)≦Cu≦5%, and the balance of iron (Fe) and inevitable impurities, wherein the weld heat affected zones have a Charpy impact value of 100 J or greater at −40° C. The toughness of the austenitic steel is not decreased in weld heat affected zones because the formation of carbides during welding is suppressed, and the machinability of the austenitic steel is improved so that a cutting process may be easily performed on the austenitic steel. The corrosion resistance of the austenitic steel is improved so that the austenitic steel may be used for an extended period of time in corrosive environments. | 12-04-2014 |
20140373588 | WEAR RESISTANT AUSTENITIC STEEL HAVING SUPERIOR MACHINABILITY AND TOUGHNESS IN WELD HEAT AFFECTED ZONES THEREOF AND METHOD FOR PRODUCING SAME - There are provided a wear resistant austenitic steel having superior machinability and toughness in weld heat affected zones and a method for producing the austenitic steel. The austenitic steel includes, by weight %, manganese (Mn): 15% to 25%, carbon (C): 0.8% to 1.8%, copper (Cu) satisfying 0.7C-0.56(%)≦Cu≦5%, and the balance of iron (Fe) and inevitable impurities, wherein the weld heat affected zones have a Charpy impact value of 100 J or greater at −40° C. The toughness of the austenitic steel is not decreased in weld heat affected zones because the formation of carbides during welding is suppressed, and the machinability of the austenitic steel is improved so that a cutting process may be easily performed on the austenitic steel. The corrosion resistance of the austenitic steel is improved so that the austenitic steel may be used for an extended period of time in corrosive environments. | 12-25-2014 |