| Patent application number | Description | Published |
|---|
| 20090207784 | RANK FEEDBACK METHOD FOR MULTIPLE-INPUT MULTIPLE-OUTPUT TRANSMISSION - A method for transmitting a plurality of control information through a PUCCH or a PUSCH is disclosed. The method includes transmitting first control information, and transmitting second control information. The transmission of the first control information and the transmission of the second control information are performed in units of one subframe and are performed once per predetermined period, respectively. In a subframe in which the transmission of the second control information is to be simultaneously performed with the transmission of the first control information, the second control information is excluded for transmission or the first and the second information are simultaneously transmitted, according to the configuration of a closed-loop system or an open-loop system. | 08-20-2009 |
| 20100014500 | METHOD FOR PERFORMING AN ADAPTIVE MODULATION AND CODING SCHEME IN MOBILE COMMUNICATION SYSTEM - An efficient link adaptive scheme according to a channel status in a broadband wireless communication system is disclosed. In applying an adaptive modulation and coding (AMC) scheme, modulation and coding selection (MCS) subsets are determined from all or part of MCS set in accordance with a service type or channel status, whereby feedback overhead is reduced and efficient link adaptation is performed in conjunction with a downlink power control scheme. | 01-21-2010 |
| 20100054358 | METHOD OF TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting control information in a wireless communication system is provided. The method includes configuring downlink control information including a plurality of information fields according to a format of scheduling for transmission of a single codeword in a spatial multiplexing mode, wherein the plurality of information fields include a preceding matrix indicator (PMI) confirmation filed for indicating whether preceding is performed on downlink data by using a PMI reported by a user equipment and a transmitted preceding matrix indicator (TPMI) information field for indicating a codebook index, and at least one of the PMI confirmation field and the TPMI information field indicates an offset value of power for the downlink data transmission or interference information for the downlink data transmission, and transmitting the downlink control information. | 03-04-2010 |
| 20100074357 | METHOD AND APPARATUS FOR TRANSMITTING DATA WITH TIME DIVERSITY AND/OR TIME-FREQUENCY DIVERSITY, AND PATTERN-GENERATING METHOD TO BE USED IN THE SAME - A method and apparatus for transmitting data having time diversity and data having time-frequency diversity, and a pattern generating method for the same are disclosed. The apparatus enables Tx data to have time diversity or time frequency diversity using a predetermined pattern multiplied by Tx data of a time domain or Tx data of time and frequency domains. The apparatus makes a cyclic delay diversity (CDD) scheme to have the diversity of time and frequency domains, and may acquire an additional diversity gain by a combination of the above-mentioned methods. | 03-25-2010 |
| 20100097949 | METHOD FOR TRANSMITTING AND RECEIVING FEEDBACK INFORMATION - A method for efficiently transmitting and receiving feedback information is disclosed. A cluster size as a unit for computing the feedback information and a reporting period of the feedback information are not uniformly determined by a base station. Information about a downlink channel status of each user equipment is reported, the cluster size and feedback period for computing and reporting the feedback information are determined using the information about the downlink channel status of each user equipment, and the feedback information is transmitted/received, thereby improving system capability. | 04-22-2010 |
| 20100142642 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION IN MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM - A method for transmitting feedback information in a Multiple-Input Multiple-Output (MIMO) system is provided. The method constructs and transmits CQI (Channel Quality Information) channel including at least one CQI for uplink control information, wherein additional feedback information is included in at least one punctured bit among a plurality of bits allocated for the CQI channel. | 06-10-2010 |
| 20100183057 | METHOD FOR TRANSMITTING/RECEIVING MULTIPLE CODEWORD IN A MULTIPLE INPUT MULTIPLE OUTPUT COMMUNICATION SYSTEM - A method for transmitting a multiple codeword (MCW) in a Multiple Input Multiple Output (MIMO) communication system is disclosed. A method for transmitting a multiple codeword (MCW) in a Multiple-Input Multiple-Output (MIMO) communication system includes performing a channel coding and modulation process for each codeword of the multiple codeword (MCW), multiplying the channel-coded-modulated result by a rotation matrix decided by either a spatial multiplexing rate or a layer (R), and performing a codeword permutation (CP) on the multiple codeword (MCW), performing a MIMO encoding on the multiple codeword (MCW), and transmitting the multiple codeword (MCW) via a multi-antenna. | 07-22-2010 |
| 20100195615 | TECHNIQUE FOR TRANSMITTING AND RECEIVING DOWNLINK REFERENCE SIGNALS - A technique for receiving and transmitting downlink reference signals is disclosed. When transmitting downlink data demodulation reference signals (DMRS) (or reference signals for downlink data demodulation) by using two or more layers, the DMRS of each layer may be multiplexed by using a code division multiplexing method and then transmitted. The DMRS for each of the two or more layers may be used for one user equipment or for two or more user equipments. And, downlink control signals for transmitting and receiving such DMRS may be configured to have the same format regardless of a single-user mode (or SU-MIMO mode) or a multi-user mode (or MU-MIMO mode), thereby being used. | 08-05-2010 |
| 20100208838 | UPLINK PRECODING METHOD IN 4-Tx SYSTEM - A method for a user equipment to precode and transmit an uplink signal efficiently in a 4-antenna system and a method for a base station to receive the transmitted signal efficiently are disclosed. Four antennas of a user equipment can be grouped by a 2-antenna unit. In consideration of this antenna group, it is able to perform precoding using antenna selection/DFT matrix of the antenna group unit. Moreover, a rank-3 codebook can be configured to include a precoding matrix of a type in consideration of power balance per antenna and a precoding matrix including one non-zero component only in one row for maintaining a good CM property. | 08-19-2010 |
| 20100220801 | UPLINK PRECODING METHOD IN 4-Tx SYSTEM - A method for a user equipment to precode and transmit an uplink signal efficiently in a 4-antenna system and a method for a base station to receive the transmitted signal efficiently are disclosed. Four antennas of a user equipment can be grouped by a 2-antenna unit. In consideration of this antenna group, it is able to perform precoding using antenna selection/DFT matrix of the antenna group unit. Moreover, a rank-3 codebook can be configured to include a precoding matrix of a type in consideration of power balance per antenna and a precoding matrix including one non-zero component only in one row for maintaining a good CM property. | 09-02-2010 |
| 20100239036 | METHOD AND APPARATUS FOR TRANSMITTING PRECODING MATRIX INDEX IN A WIRELESS COMMUNICATION SYSTEM USING CoMP SCHEME - A method and apparatus for transmitting a Precoding Matrix Index (PMI) in a Coordinated Multi-Point (COMP) communication system are disclosed. The method includes receiving signals in a same frequency band from Base Stations (BSs) included in a CoMP set, which operate in joint processing mode, selecting a first precoding matrix for each of the BSs using the received signals, generating a second precoding matrix by combining the first precoding matrices, and transmitting an index of the second precoding matrix to a serving BS among the BSs. | 09-23-2010 |
| 20100254335 | METHOD OF TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting channel state information from a user equipment in a wireless communication system is disclosed. In order to report the channel state information, the user equipment is able to additionally transmit noise plus interference variance information as well as spatial channel matrix or spatial channel covariance matrix. The spatial channel matrix or spatial channel covariance matrix and the noise plus interference variance information can include information on a prescribed number of subbands in best channel states and can include information on a wideband including a plurality of subbands. Moreover, the user equipment is able to transmit normalized spatial channel matrix or spatial channel covariance matrix and normalized noise plus interference variance information for accurate and efficient transmission of the channel state information. | 10-07-2010 |
| 20100265901 | METHOD FOR TRANSMITTING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method for transmitting channel state information from an user equipment in a wireless communication system is disclosed. The user equipment transmits a spatial channel matrix or a spatial channel covariance matrix irrespective of a feedback type. The user equipment is able to additionally transmit noise plus interference variance information of a whole bandwidth used for the channel state information. In this case, the user equipment is able to transmit normalized spatial channel matrix or spatial channel covariance matrix and normalized noise plus interference variance information for accurate and efficient transmission of the channel state information. The user equipment receives an allocation of an uplink resource from a base station and is then able to map the spatial channel matrix or the spatial channel covariance matrix to the allocated resource according to a specific pattern. | 10-21-2010 |
| 20100291940 | Apparatus and Method for Transmitting CoMP Feedback Information - A method of efficiently transmitting CoMP feedback information from an user equipment, which performs CoMP operation, in a wireless communication system to reduce inter-cell interference is disclosed. The user equipment requests a neighboring cell, which affects the user equipment through interference, to restrict use of a specific beam pattern group in a serving cell direction. In this case, whether the user equipment will request such restriction is determined based on a channel status value of the user equipment. If the user equipment determines to request such restriction, the user equipment transmits a request message to a serving base station, the request message requesting to restrict use of the specific beam pattern group. In this case, the user equipment performs scheduling and requests a specific neighboring cell to restrict use of the specific beam pattern group at a specific resource region. | 11-18-2010 |
| 20100311349 | Method for Estimating Channel State in a Wireless Communication System Using Fractional Frequency Reuse and Mobile Station Using the Same - A method for estimating channel state in a wireless communication system and a mobile station using the same are disclosed. The method includes acquiring cell Identifiers (IDs) of a serving cell and one or more neighbor cells, acquiring information about preset power level patterns for one or more frequency partitions to which FFR is applied according to the cell IDs, and estimating a channel state of the serving cell based on the power level pattern information. | 12-09-2010 |
| 20100316093 | METHOD FOR DETECTING SIGNALS BASED ON DESPREADING AND METHOD FOR TRANSMITTING SIGNALS FOR THE SAME - A method for detecting signals based on despreading and a signal transmitting method for the same are disclosed. Signals are spread according to the size of at least one spreading band, which is determined in consideration of a correlation degree of a frequency band in a communication system. A reception side which receives the signals detects the signals after despreading with respect to signals which are spread in a frequency band having a correlation degree equal to or greater than a predetermined level as a spreading band, among the reception signals. Thus, the dimension of the detected signals can be decreased. | 12-16-2010 |
| 20100323737 | METHOD OF PERFORMING FEEDBACK FOR MULTICAST AND BROADCAST SERVICE - A method of performing a feedback for a multicast and broadcast service (MBS) is disclosed. A Multicast Broadcast Service (MBS) feedback method includes, generating, by a base station contained in a multi-cell multicast broadcast single frequency network (MBSFN) zone, a ranging channel code for a multicast broadcast service (MBS) feedback, allocating the ranging channel code to a mobile station contained in a cell zone of the base station, and receiving the MBS feedback information based on the ranging channel code from the mobile station. So, an adaptive modulation and coding (AMC) is applied to the MBS according to the NACK feedback, such that a throughput of the MBS system increases. | 12-23-2010 |
| 20110009137 | METHOD OF MEASURING INTERFERENCE - A method of measuring interference to perform efficient data communication is disclosed. A method of measuring interference of neighboring cells comprises allocating one or more first resource elements, to which pilot signals are allocated, to predetermined symbol regions included in a first resource block; allocating one or more second resource elements for measuring interference of the neighboring cells to a first symbol region of the predetermined symbol regions; and measuring interference of the neighboring cells using the one or more second resource elements. | 01-13-2011 |
| 20110013581 | Method for Channel Allocating in Wireless Access System - A method for allocating uplink and downlink physical channels to improve throughput of a wireless access system is disclosed. A method for allocating channels to optimize a wireless access system which supports radio frequencies comprises configuring one or more physical channels in a transmitter; allocating first physical channels to a receiver considering features of the one or more physical channels; and transmitting one or more control channels to the receiver through a predetermined physical channel of the first physical channels, the control channels including configuration information of the first physical channels allocated to the receiver. | 01-20-2011 |
| 20110110357 | UPLINK TRANSMISSION CONTROL METHOD IN SYSTEM SUPPORTING AN UPLINK MULTIPLE ACCESS TRANSMISSION MODE - Disclosed herein is a method of generating an uplink reference signal in a system supporting a plurality of uplink access schemes. The method includes, at a base station, transmitting reference signal configuration information indicating the configuration of a reference signal to be transmitted in uplink, which is generated according to the plurality of uplink access schemes, to a user equipment which is set to operate in an uplink access scheme corresponding to the information, and receiving a subframe including the reference signal generated based on the reference signal configuration information from the user equipment. The reference signal configuration information includes a cyclic shift value of a sequence of the reference signal. | 05-12-2011 |
| 20110122794 | METHOD OF REPORTING CHANNEL QUALITY INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method for reporting channel quality information in a wireless communication system, and a method for assigning radio resources according to the channel quality information are disclosed. A method for reporting channel quality information by a user equipment (UE) of a wireless communication system measures channel quality information of a downlink multi-carrier including a plurality of downlink component carriers, and transmits the measured channel quality information to a base station. | 05-26-2011 |
| 20110128901 | METHOD FOR SAVING POWER IN A MULTI-CARRIER WIRELESS ACCESS SYSTEM - A method for saving power in a multi-carrier wideband wireless access system is provided. A method for saving the power of a receiver in a multi-carrier wireless communication system includes acquiring multi-carrier information from a transmitter on a primary carrier, entering one or more secondary carriers satisfying a predetermined power saving mode entry condition out of one or more secondary carriers included in the multi-carrier information into a power saving mode, and receiving data during a listening interval according to the power saving mode on the one or more secondary carriers entering the power saving mode. The multi-carrier information includes at least one of information about a plurality of available carriers, information indicating the primary carrier and the one or more secondary carriers out of the plurality of available carriers, and information about the power saving mode entry condition of the one or more secondary carriers. | 06-02-2011 |
| 20110128942 | METHOD FOR TRANSMITTING CONTROL INFORMATION ABOUT DOWNLINK MULTIPLE CARRIERS IN A WIRELESS COMMUNICATION SYSTEM - A method for transmitting uplink control information in a wireless communication system is disclosed. The method includes receiving one or more downlink component carriers among N downlink component carriers created by dividing a multi-carrier by an integer N, and transmitting control information about the received one or more downlink component carriers in one or more uplink component carriers among N uplink component carriers created by dividing a multi-carrier by the integer N, wherein the control information about the received one or more downlink component carriers is distributed equally or unequally to the one or more uplink component carriers and the control information includes at least one of a Channel Quality Information/Precoding Matrix Index (CQI/PMI), an ACKnowledgment/Negative ACKnowledgment (ACK/NACK), and a Rank Indication (RI). | 06-02-2011 |
| 20110158219 | METHOD FOR TRANSMITTING DATA IN MULTIPLE ANTENNA SYSTEM - A method of sending data in a multiple antenna system according to an aspect of the present invention includes performing precoding on received symbols based on a second codebook generated from a first codebook for a plurality of transmission antennas and sending the precoded symbols. The second codebook is a codebook for transmission antennas which are a multiple of an integer of the plurality of transmission antennas, and a precoding matrix included in the second codebook is generated by a combination of precoding matrices included in the first codebook. | 06-30-2011 |
