Patent application number | Description | Published |
20080267318 | METHOD FOR TRANSMITTING A SIGNAL IN MULTI-ANTENNA COMMUNICATION SYSTEM - A multi-input multi-output (MIMO) system considers either reliability for each antenna or a time/frequency location, and transmits a signal at an unequal ratio for each antenna according to the consideration result. The method for use in the MIMO system including multiple antennas includes processing a signal according to an unequal ratio transmission scheme employing the multiple antennas at an unequal ratio, and transmitting the processed signal via the multiple antennas. | 10-30-2008 |
20090052405 | METHOD OF TRANSMITTING FEEDBACK DATA IN A MULTIPLE ANTENNA SYSTEM - A method of transmitting feedback data in a multiple antenna system comprises receiving a request message of feedback data on a downlink channel, the request message comprising uplink scheduling information, selecting a set of M (M≧1) subbands within a plurality of subbands, generating the feedback data, the feedback data comprising a frequency selective PMI (preceding matrix indicator), a frequency flat PMI, a best band CQI (channel quality indicator) and a whole band CQI, and transmitting the feedback data on a uplink channel allocated to the uplink scheduling information. | 02-26-2009 |
20090067531 | METHOD FOR REPORTING CHANNEL INFORMATION IN MULTIPLE ANTENNA SYSTEM - There is provided a method of reporting downlink channel information to a base station in a multiple antenna system. The method includes reporting a single rank for overall subband, the overall subband comprising a plurality of subbands and reporting a CQI for the single rank for at least one subband. Radio resources required for reporting channel information can be reduced and signaling overheads can be minimized. | 03-12-2009 |
20100111226 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN MULTIPLE ANTENNA SYSTEM - A method of transmitting control information includes dividing frequency bandwidth into ranges to which the same PMI (precoding matrix index) is applied, obtaining multiple antenna information by the range to which the same PMI is applied and transmitting the multiple antenna information. Since multiple antenna information is transmitted by the unit of a range to which the same PMI is applied, radio resources allocated for transmitting the multiple antenna information may be reduced, thereby enhancing data transmission efficiency. | 05-06-2010 |
20100183086 | METHOD OF TRANSMITTING FEEDBACK DATA IN MULTIPLE ANTENNA SYSTEM - A method of transmitting feedback data in a multiple antenna system includes generating feedback data based on the channel information and transmitting the feedback data at transmission periods, wherein the feedback data is transmitted in a plurality of report types respectively having a different control signal type contained depending on the transmission periods. | 07-22-2010 |
20100310000 | METHOD OF TRANSMITTING PRECODING INFORMATION IN MULTIPLE ANTENNA SYSTEM - A method of transmitting precoding information in a multiple antenna system includes selecting M subbands from a plurality of subbands constituting a whole frequency band in a descending order of a channel quality indicator (CQI), where M is an integer satisfying M>0, and transmitting a first precoding matrix indicator (PMI) for the M subbands and a second PMI for a remaining band, wherein the first PMI is a PMI of a codebook selected from a first codebook set including a plurality of codebooks and the second PMI is a PMI of a codebook selected from a second codebook set including a part of the plurality of codebooks of the first codebook set. Accordingly, precoding information can be effectively transmitted by separately preparing a codebook for a best band and a codebook for a non-selected band. | 12-09-2010 |
20110274199 | METHOD OF TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM - The method includes generating coded bits by encoding information bits, dividing the coded bits into a first bit-stream and a second bit-stream, generating a first data symbol by performing anti-gray mapping on the first bit-stream, generating a second data symbol by performing gray mapping on the second bit-stream, and transmitting the first data symbol and the second data symbol. Reliability of bits can be improved in the first bit-stream and the second bit-stream by using different mapping schemes. | 11-10-2011 |
20120201165 | METHOD OF TRANSMITTING FEEDBACK DATA IN A MULTIPLE ANTENNA SYSTEM - A method of transmitting feedback data in a multiple antenna system comprises receiving a request message of feedback data on a downlink channel, the request message comprising uplink scheduling information, selecting a set of M (M≧1) subbands within a plurality of subbands, generating the feedback data, the feedback data comprising a frequency selective PMI (precoding matrix indicator), a frequency flat PMI, a best band CQI (channel quality indicator) and a whole band CQI, and transmitting the feedback data on a uplink channel allocated to the uplink scheduling information. | 08-09-2012 |
20120269295 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN MULTIPLE ANTENNA SYSTEM - A method of transmitting control information includes dividing frequency bandwidth into ranges to which the same PMI (precoding matrix index) is applied, obtaining multiple antenna information by the range to which the same PMI is applied and transmitting the multiple antenna information. Since multiple antenna information is transmitted by the unit of a range to which the same PMI is applied, radio resources allocated for transmitting the multiple antenna information may be reduced, thereby enhancing data transmission efficiency. | 10-25-2012 |
Patent application number | Description | Published |
20100296429 | Method for Obtaining Synchronization Signal In Wireless Communication System - A method for obtaining a synchronization signal in a wireless communication system includes dividing a full frequency band into a synchronization band for transmission of the synchronization signal and a usual band for transmission of multicast broadcast multimedia service (MBMS) data, and searching for a primary synchronization signal (PSS) for a dedicated MBMS in the synchronization band, and detecting the PSS for the dedicated MBMS through the synchronization band. | 11-25-2010 |
20110149942 | Method of Transmitting Data in Multiple Antenna System - A method of transmitting data in a multiple antenna system includes transmitting first data through a first pilot pattern zone in which pilots are arranged in a specific pilot pattern in a permutation zone having at least one tile comprising a plurality of orthogonal frequency division multiplexing (OFDM) symbols and a plurality of subcarriers, and transmitting second data through a second pilot pattern zone in which pilots are arranged in another pilot pattern different from the pilot pattern of the first pilot pattern zone in the permutation zone. Accordingly, a plurality of pilot patterns can be simultaneously used in one permutation zone, and thus waste of radio resources caused by the use of unnecessary pilots can be reduced by adaptively assigning pilots according to various channel environments and performances of user equipments. | 06-23-2011 |
20120106500 | METHOD AND APPARATUS FOR FEEDBACK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for feedback transmission in a wireless communication system are provided. A terminal selects at least one subband among plural subbands constituting a set of subbands and transmits information about feedback measured for the at least one subband. The feedback information contains an index of the at least one subband, and the at least one subband is selected in consideration of resource mapping of the plural subbands. | 05-03-2012 |
20120320857 | METHOD AND APPARATUS FOR FEEDBACK TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM - The present invention provides a method and an apparatus for feedback transmission in a wireless communication system. A terminal receives downlink control information from a base station and transmits to the base station event-driven feedback information over a first feedback channel. The downlink control information includes information about a short-term feedback period that corresponds to a short period of time for transmitting feedback information and information about a long-term feedback period that corresponds to a long period of time for transmitting feedback information, and the event-driven feedback information is transmitted on the basis of the long-term feedback period. | 12-20-2012 |
20130070623 | METHOD AND APPARATUS FOR ALLOCATING A SOUNDING CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - There are provided a method and apparatus for allocating a sounding channel in a wireless communication system. A base station transmits a first sounding channel allocation data to allocate a first sounding channel for a first system to a first zone, and transmits a second sounding channel allocation data to allocate a second sounding channel for a second system other than the first system to a second zone. The first zone and the second zone are multiplexed by an FDM (Frequency Division Multiplexing) method, and the first sounding channel and the second sounding channel are allocated to a same OFDMA (Orthogonal Frequency Division Multiple Access) symbol. A channel response can be estimated accurately when a terminal for IEEE (Institute of Electrical and Electronics Engineers) 802.16m system and a terminal for IEEE 802.16e system coexist in a legacy support mode. | 03-21-2013 |
Patent application number | Description | Published |
20120282966 | CHANNEL QUALITY INFORMATION TRANSMISSION METHOD IN WIRELESS COMMUNICATION SYSTEM ADOPTING COORDINATED MULTI-POINT SCHEME AND AN APPARATUS THEREFOR - The present invention relates to a channel quality information transmission method in a communication system adopting a coordinated multi-point scheme. A terminal receives signals, through the same band, from a serving base station and at least one neighbor base station, respectively, which are included in a CoMP set operating in a joint processing mode. Next, the terminal generates combined channel quality information on a single signal obtained by combining the signals received through the same band, and then transmits the information to the serving base station. The combined channel quality information is generated using information on a combined channel obtained by combining channels between the terminal and the serving base station and between the terminal and each one of the at least one neighbor base station, which are included in the CoMP set. | 11-08-2012 |
20130039341 | DEVICE FOR CONTROLLING UPLINK TRANSMISSION POWER AND A METHOD FOR THE SAME - Disclosed are a device for controlling uplink transmission power and a method for the same. In a terminal device for controlling uplink transmission power according to the present invention, a receiving antenna receives a first message containing a power correction value from a base station. A processor determines the transmission power value which will be used in transmitting a second message, based on the power correction value. A sending antenna transmits the second message to the base station, using the determined transmission power value, and, at this time, the power correction value is a value for correcting the transmission-power value is a value for correcting the transmission-power value which was used during initial ranging by the terminal or handover ranging of the terminal. | 02-14-2013 |
20130083743 | METHOD FOR TRANSMITTING PRECODING MATRIX INFORMATION AND USER DEVICE, AND METHOD FOR TRANSMITTING DATA TO PLURALITY OF USER DEVICES AND BASE STATION - The present invention relates to a precoding matrix information transmission method and a user device, and provides a method for transmitting precoding matrix information by a particular user device among user devices that receive a signal transmitted from one base station. The method comprises the steps of: determining, from a predetermined codebook, a first precoding matrix which is a precoding matrix for the particular user device during signal reception, and determining one or more second precoding matrices for the other user devices which are to be multiplexed in a predetermined resource region with the particular user device, wherein the one or more second precoding matrices are determined within a codebook subset of the predetermined codebook linked with the first precoding matrix; and transmitting, to the base station, first precoding matrix information indicating the first precoding matrix and second precoding matrix information indicating the one or more second precoding matrices. | 04-04-2013 |