| Patent application number | Description | Published |
|---|
| 20080279296 | METHOD FOR TRANSMITTING CONTROL INFORMATION, AND METHOD FOR GENERATING CODEWORD FOR THE SAME - A method for transmitting downlink control information and a method for generating a codeword for the same are disclosed. In generating a long code having a low code rate, a basic code of which minimum distance between codes is maximized is repeated by a prescribed number of times and bits of the repeated code are adjusted. Therefore, a minimum distance condition between codes of a long code is satisfied and simultaneously the code can be simply generated. Furthermore, control information can be transmitted with a low error rate by using the generated code. | 11-13-2008 |
| 20090209247 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION THROUGH PDCCH - A method for efficiently transmitting and receiving control information through a Physical Downlink Control Channel (PDCCH) is provided. When a User Equipment (UE) receives control information through a PDCCH, the received control information is set to be decoded in units of search spaces, each having a specific start position in the specific subframe. Here, a modulo operation according to a predetermined first constant value (D) is performed on an input value to calculate a first result value, and a modulo operation according to a predetermined first variable value (C) corresponding to the number of candidate start positions that can be used as the specific start position is performed on the calculated first result value to calculate a second result value and an index position corresponding to the second result value is used as the specific start position. Transmitting control information in this manner enables a plurality of UEs to efficiently receive PDCCHs without collisions. | 08-20-2009 |
| 20090310476 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system, for distributed mapping of consecutively allocated virtual resource blocks to physical resource blocks, when nulls are inserted into a block interleaver used for the mapping, they are uniformly distributed to N | 12-17-2009 |
| 20090316758 | METHOD FOR TRANSMITTING DATA USING FREQUENCY HOPPING SCHEME AND METHOD FOR DETERMINING A SUB-BAND FOR THE FREQUENCY HOPPING - A frequency hopping scheme in a communication system using a plurality of sub-carriers is disclosed. A sub-band for frequency hopping is set and the frequency hopping scheme is applied using the set sub-band. The frequency hopping scheme is applied in the communication system by assigning a virtual index to a resource block including one or more sub-carriers and transforming the virtual index according to a specific rule to acquire a virtual index of a next resource block for the frequency hopping. | 12-24-2009 |
| 20100005351 | METHOD OF RETRANSMITTING DATA IN A MOBILE COMMUNICATION SYSTEM - A communication method according to an automatic repeat request scheme in a mobile communication system includes transmitting a retransmission packet per certain time period (periodically) in response to NACK of a first user equipment related to a first packet transmitted within a frame group consisting of a plurality of successive frames, and transmitting a retransmission packet non-periodically in response to NACK of a second user equipment related to a second packet transmitted within the frame group. | 01-07-2010 |
| 20100098005 | METHOD FOR RECEIVING ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK signal. | 04-22-2010 |
| 20100098019 | METHOD FOR TRANSMITTING CONTROL SIGNAL USING EFFICIENT MULTIPLEXING - Methods of transmitting a control signal using efficient multiplexing are disclosed. One of the method includes the steps of multiplexing a plurality of 1-hit control signals within a prescribed time-frequency domain by code division multiple access (CDMA) and transmitting the multiplexed control signals, wherein a plurality of the 1-bit control signals include a plurality of the 1-bit control signals for a specific transmitting side. Accordingly, reliability on 1-bit control signal transmission can be enhanced. | 04-22-2010 |
| 20100098020 | METHOD FOR TRANSMITTING DOWNLINK CONTROL SIGNAL - A method of transmitting a downlink control signal is disclosed, by which localized allocation and distributed allocation are efficiently used in transmitting a downlink control signal. The present invention includes multiplexing the downlink control signal in a manner of if there exists downlink data transmission to a prescribed UE, applying localized allocation to a transmission of the downlink control signal including the scheduling information on the uplink data transmission of the UE and applying distributed allocation to another transmission of the downlink control signal and transmitting the multiplexed downlink control signal. | 04-22-2010 |
| 20100111031 | METHOD FOR TRANSMITTING CONTROL SIGNAL USING EFFICIENT MULTIPLEXING - A method of transmitting a control signal using efficient multiplexing is disclosed. The present invention includes the steps of multiplexing a plurality of 1-bit control signals within a prescribed time-frequency domain by code division multiple access (CDMA) and transmitting the multiplexed control signals, wherein a plurality of the 1-hit control signals include a plurality of the 1-bit control signals for a specific transmitting side. Accordingly, reliability on 1-bit control signal transmission can be enhanced. | 05-06-2010 |
| 20100182988 | SIGNAL TRANSMISSION METHOD USING CDM AGAINST THE EFFECT OF CHANNEL ESTIMATION ERROR IN TRANSMIT DIVERSITY SYSTEM - A method of transmitting a signal using code division multiplexing (CDM) in order to reduce the influence of channel estimation error in a multi-input multi-output antenna (MIMO) system using transmit diversity is disclosed. That is, the method of transmitting a signal by a transmitter using a plurality of antennas includes code division multiplexing input symbols using codes according to a predetermined spreading matrix, and transmitting the code division multiplexed symbols via the plurality of antennas according to an Alamouti scheme. At this time, the predetermined spreading matrix is set such that a first component and a second component configuring interference due to channel estimation error have orthogonal phases. | 07-22-2010 |
| 20100260057 | METHOD FOR MAPPING CONTROL CHANNELS - A method for mapping control channels is disclosed. This mapping method includes calculating a control channel mapping start time of each cell according to the number of control channel groups allocated to each cell, and performing mapping of repetition of the control channel at intervals of a predetermined distance in order to acquire a diversity gain, wherein the mapping begins from the control channel mapping start time. In this case, control channels of several groups are transmitted in each cell. So, a resource allocation method during transmission of control channels (e.g., PHICH and PCFICH) is improved such that interference between neighboring cells can be reduced, resulting in the improvement of a control channel throughput. | 10-14-2010 |
| 20100284352 | METHOD FOR TRANSMITTING/RECEIVING ACK/NAK SIGNAL IN AN OFDM COMMUNICATION SYSTEM - A method for receiving an acknowledgement (ACK)/negative acknowledgement (NAK) signal in an orthogonal frequency division multiplexing (OFDM) communication system is described. The method includes receiving ACK/NAK signals and repetitions of the ACK/NAK signals mapped to one or more OFDM symbols which are allocated for transmission of a plurality of ACK/NAK signals within one sub-frame, and confirming receipt of the ACK/NAK signals. The OFDM symbol for each ACK/NAK signal is determined according to the repetition of the ACK/NAK signals, and frequency regions for the ACK/NAK signals within the OFDM symbols are different from frequency regions for the repetition of the ACK/NAK signals within the OFDM symbols. | 11-11-2010 |
| 20110044270 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system, for distributed mapping of consecutively allocated virtual resource blocks to physical resource blocks, when nulls are inserted into a block interleaver used for the mapping, they are uniformly distributed to N | 02-24-2011 |
| 20110051681 | METHOD OF SIGNALING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM WITH MULTIPLE FREQUENCY BLOCKS - A method for performing communication in a user equipment of a wireless communication system comprises receiving a control region through a specific frequency block of a plurality of frequency blocks, the control region including a plurality of control channels; identifying a first control channel for the user equipment in the control region; and performing an operation in accordance with information included in the first control channel, wherein the specific frequency block through which the first control channel is transmitted is changed according to a certain pattern with the lapse of time. | 03-03-2011 |
| 20110058526 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system, for distributed mapping of consecutively allocated virtual resource blocks to physical resource blocks, when nulls are inserted into a block interleaver used for the mapping, they are uniformly distributed to N | 03-10-2011 |
| 20110064164 | Apparatus And Method For Transceiving Downlink Control Information - A method and apparatus for transceiving Physical hybrid-ARQ indicator channel in a wireless mobile communication system using multi-carriers is disclosed. This method comprises a first reception step of receiving signaling information indicating that a number (N1) of first downlink channels allocated to the first frequency band is 0 through the second frequency band, and a decision step of deciding the number (N1) of first downlink channels allocated to the first frequency band to be 0. | 03-17-2011 |
| 20110075629 | METHOD FOR USER EQUIPMENT TO PERFORM RANDOM ACCESS TO BASE STATION IN WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE UPLINK AND DOWNLINK CARRIERS - A method for a user equipment to perform random access to a base station in a wireless communication system that supports multiple uplink and downlink carriers is provided. In the method, system information including cell identifier information of each of the downlink component carriers and PRACH TF slot and preamble sequence information which is common to all downlink component carriers, the system information being broadcast through each downlink component carrier corresponding to the cell identifier information, is received. A PRACH preamble is transmitted through one uplink component carrier linked to the downlink component carriers using the received PRACH TF slot and preamble sequence information. An RACH response is received through each of the downlink component carriers. The cell identifier information is used to transmit a Radio Resource Control (RRC) connection request signal and cell identifier information of a downlink component carrier, which the user equipment desires to access among the downlink component carriers. | 03-31-2011 |
| 20110077039 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION THROUGH PDCCH - A method for efficiently transmitting and receiving control information through a Physical Downlink Control Channel (PDCCH) is provided. When a User Equipment (UE) receives control information through a PDCCH, the received control information is set to be decoded in units of search spaces, each having a specific start position in the specific subframe. Here, a modulo operation according to a predetermined first constant value (D) is performed on an input value to calculate a first result value, and a modulo operation according to a predetermined first variable value (C) corresponding to the number of candidate start positions that can be used as the specific start position is performed on the calculated first result value to calculate a second result value and an index position corresponding to the second result value is used as the specific start position. Transmitting control information in this manner enables a plurality of UEs to efficiently receive PDCCHs without collisions. | 03-31-2011 |
| 20110080888 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION THROUGH PDCCH - A method for efficiently transmitting and receiving control information through a Physical Downlink Control Channel (PDCCH) is provided. When a User Equipment (UE) receives control information through a PDCCH, the received control information is set to be decoded in units of search spaces, each having a specific start position in the specific subframe. Here, a modulo operation according to a predetermined first constant value (D) is performed on an input value to calculate a first result value, and a modulo operation according to a predetermined first variable value (C) corresponding to the number of candidate start positions that can be used as the specific start position is performed on the calculated first result value to calculate a second result value and an index position corresponding to the second result value is used as the specific start position. Transmitting control information in this manner enables a plurality of UEs to efficiently receive PDCCHs without collisions. | 04-07-2011 |
| 20110096658 | PRECODING METHOD FOR REDUCING UPLINK PAPR AND APPARATUS THEREOF - A radio communication system is provided. An uplink transmission method of a user equipment in a radio communication system includes performing Fourier transform on one or more data sequences to generate one or more first frequency-domain sequences, applying precoding for multi-antenna transmission to the one or more first frequency-domain sequences to generate one or more second frequency-domain sequences; performing inverse Fourier transform on the one or more second frequency-domain sequences to generate one or more transmission symbols, and transmitting the one or more transmission symbols via multiple antennas. | 04-28-2011 |
| 20110096745 | METHOD OF TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method of, at a base station, transmitting spread signals in a wireless communication system includes spreading a plurality of signals using a spreading code with a predetermined spreading factor, multiplexing a plurality of spread signals to construct one or more spread signal groups, mapping the one or more spread signal groups to one or more specific Control Channel Elements (CCEs) set within one or more Orthogonal Frequency Division Multiplexing (OFDM) symbols, and transmitting the spread signals to User Equipments (UEs) through the one or more CCEs. | 04-28-2011 |
| 20110098074 | METHOD FOR WIRELESS COMMUNICATION BETWEEN USER EQUIPMENT AND BASE STATION IN WIRELESS COMMUNICATION SYSTEM SUPPORTING FIRST USER EQUIPMENT THAT USES SINGLE FREQUENCY BAND AND SECOND USER EQUIPMENT THAT USES PLURALITY OF FREQUENCY BANDS - A method for wireless communication between user equipments (UEs) and a base station in a wireless communication system that supports a first UE using a single band and a second UE using multiple bands is provided. In the method, UE receives, from the base station, resource allocation information including information regarding a downlink component carrier (CC) and an uplink CC allocated to the UE, receives the allocated downlink CC, and transmits the allocated uplink CC by applying a cell ID thereto. The allocated downlink CC is one of downlink CCs to which different cell IDs are applied, pairs of CCs are predefined by associating uplink CCs respectively with downlink CCs in order to support the first UE. When the allocated downlink and uplink CCs do not belong to the pairs of CCs, the applied cell ID is a cell ID of a downlink CC that is paired with the allocated uplink CC in the predefined pairs of CCs. | 04-28-2011 |
| 20110134861 | METHOD AND DEVICE FOR ALLOCATING RESOURCES IN MULTIPLE FREQUENCY BAND SYSTEM - A method and device for allocating resources in a multiple frequency band system are disclosed. In a method for detecting a resource indication value (RIV) indicating not only a start index (S) of consecutive virtual resource blocks (VRBs) allocated to a first UE capable of simultaneously receiving information from a plurality of frequency bands, but also a length (L) of the consecutive VRBs, in a wireless mobile communication system capable of using the plurality of frequency bands, the method includes receiving, by the first UE, the RIV, and detecting the RIV, wherein the detected is greater than a maximum value usable as an RIV allocated to a second UE capable of receiving information from only one frequency band. | 06-09-2011 |
| 20110135016 | RADIO ACCESS METHOD FOR REDUCED PAPR - A wireless communication system is disclosed. A method for performing a radio access in the wireless communication system includes dividing an available frequency band into a plurality of subbands, generating a plurality of frequency domain sequences from a plurality of data symbol sequences by independently performing a Fourier transform process in each of the subbands, independently mapping each of the frequency domain sequences to a corresponding subband, generating one or more transmission symbols by performing an inverse Fourier transform process on the plurality of frequency domain sequences mapped to the available frequency band, and transmitting the one or more transmission symbols to a receiver. | 06-09-2011 |
| 20110149901 | METHOD FOR TRANSMITTING CONTROL SIGNAL USING EFFICIENT MULTIPLEXING - A method of transmitting a control signal using efficient multiplexing is disclosed. The present invention includes the steps of multiplexing a plurality of 1-bit control signals within a prescribed time-frequency domain by code division multiple access (CDMA) and transmitting the multiplexed control signals, wherein a plurality of the 1-bit control signals include a plurality of the 1-bit control signals for a specific transmitting side. Accordingly, reliability on 1-bit control signal transmission can be enhanced. | 06-23-2011 |
