Abstract: A wireless communication system is disclosed wherein an information source communicates with a mobile station via multiple intermediary base stations located in respective cells of a broadcast zone. In one embodiment, each base station sends multiple information streams that may be received by a mobile station located in the broadcast zone. By receiving multiple information streams from multiple base stations, the mobile station may enhance reception. In one embodiment, each base station in a broadcast zone transmits an information stream that exhibits a first level of robustness and another information stream that exhibits a second level of robustness.

Abstract: A transmission/reception method and apparatus in an Orthogonal Frequency Division Multiplexing (OFDM)-based wireless communication system are provided, in which a data transmitter adaptively selects a multiplexing scheme according to a code rate of the transmission packet or an effective SNR of a wireless channel for a corresponding terminal, when transmitting a packet data channel. The adaptive multiplexing scheme is equal in concept to a scheme of adaptively implementing unitary precoding. The unitary precoded multiplexing includes Orthogonal Frequency code Domain Multiplexing (OFCDM), Fast Fourier Transform-Spread-OFDM (FFT-S-OFDM), Fast Frequency Hopping-OFDM (FFH-OFDM), and the like. The method and apparatus adaptively selects the multiplexing scheme and transmits/receives data using the selected multiplexing scheme, thereby improving reception performance of the packet data.

Abstract: A base station includes a transmit path circuitry to transmit an uplink grant to a subscriber station. The uplink grant indicating a first MCS value for a first codeword transmission and a second MCS value for a second codeword transmission. The base station also includes a receive path circuitry configured to receive a MIMO uplink subframe from the subscriber station, the MIMO uplink subframe having a first subset of layers used for the first codeword transmission and a second subset of layers used for the second codeword transmission. ACK/NACK information and RI information are repeated on both the first and second subsets of layers, and CQI is spatially multiplexed on either the first subset or the second subset of layers. If the first MCS value is different from the second MCS value, the CQI is spatially multiplexed onto the subset of layers having a higher MCS value.

Abstract: An apparatus and method for efficiently transmitting/receiving a control channel in a mobile communication system simultaneously supporting a synchronous High-Rate Packet Data (HRPD) system and an Orthogonal Frequency Division Multiplexing (OFDM) system. Power of a control channel to be transmitted is measured. The measured power is compared with marginal maximum power set by a higher layer. According to the comparison result, information indicating whether a previous reverse packet has been successfully received and power control information for controlling power of a reverse link is inserted and transmitted in at least one of a Medium Access Control (MAC) channel and an OFDM symbol.

Abstract: Provided is a control information transmission/reception method and apparatus for providing a packet data service in an OFDM based mobile communication system. The method includes transmitting a first maximum number of control channel blocks transmissible by using a first modulation scheme and a second maximum number of control channel blocks transmissible by using a second modulation scheme, the first modulation scheme having a lower modulation order from among modulation orders of multiple modulation schemes usable for control information within a frame, the second modulation scheme having a modulation order higher than the modulation order of the first modulation scheme within the frame; and transmitting first control channel blocks determined based on the first maximum number through the first modulation scheme within the frame and transmitting second control channel blocks determined based on the second maximum number through the second modulation scheme within the frame.

Abstract: A method for allocating resources in an Orthogonal Frequency Division Multiple Access (OFDMA) mobile communication system where data is transmitted by Hybrid Automatic Repeat reQuest (HARQ) is provided, in which a multiplexing mode is selected for multiplexing a Distributed Resource Channel (DRCH) and Localized Resource Channel (LRCH) over orthogonal frequency resources, in which it is determined whether to use persistent resource allocation for each slot, if the selected multiplexing mode is a multiplexing mode that punctures the DRCH onto the LRCH, resources are allocated in an Synchronous HARQ S-HARQ scheme if the persistent resource allocation is used, and resources are allocated in a Resource Adaptive S-HARQ (RAS-HARQ) scheme if the persistent resource allocation is not used and resources are to be reused when early termination of HARQ transmission occurs.

Abstract: An apparatus and method for detecting defects in a wafer are provided. An optical part is disposed under an inspection stage and radiates infrared light. An image obtaining part detects the infrared light transmitted through the wafer to output an image signal. A conveying part conveys the image obtaining part or the inspection stage in a short side direction of a photographing region of a line sensor included in the image obtaining part, and outputs a pulse signal. A controller counts the pulse signal and outputs a photographing instruction signal controlling the image obtaining part to photograph the wafer whenever the wafer is conveyed in the short side direction of the photographing region of the line sensor toward the image obtaining part by a distance corresponding to the length of short sides of the photographing region. A defect detection part combines each image signal to generate an inspection image.

Abstract: A plurality of reporting modes used to report feedback information is provided. A transmitter and a receiver generate and share feedback information based on a corresponding reporting mode.

Abstract: A method and apparatus for allocating resource between uplink ACK/NACK channel and downlink control channel supporting spatial multiplexing in an OFDM-based wireless communication system which configures uplink ACK/NAK channel implicitly using reference signals for discriminating among resource allocation spaces and physical channel resource. The method is capable of multiplexing the uplink ACK/NACK channel associated with the control channel extended by spatial multiplexing into the uplink ACK/NACK channel resource which does not support spatial multiplexing.

Abstract: A method and apparatus for transmitting uplink control information on the data channel in a multi-carrier wireless communication system is provided. An Uplink Control Information (UCI) transmission method in a wireless communication system supporting multicarrier transmission according to the present invention includes channel-coding a UCI with reference to a number of UCI bits available; dividing the channel coded UCI bits into a number of Physical Uplink Shared Channels (PUSCHs); and transmitting the UCI multiplexed with data on the individual PUSCHs.

Abstract: A control information transmission and reception method based on a spatial-multiplexing gain, are provided. The control information may be transmitted by obtaining the spatial-multiplexing gain using an E-PDCCH region, and thus, a transmission efficiency of the control information may be improved. The common control information used for decoding the E-PDCCH may be transmitted via a PDCCH, and thus, a base station supporting both a general terminal and an enhanced terminal may effectively transmit the control information. Information associated with an indicator indicating whether the E-PDCCH is to be used during a subsequent resource allocation period may be transmitted, and thus, whether decoding with respect to the E-PDCCH is to be performed during the subsequent allocation period may be determined.

Abstract: A Channel State Information (CSI) request/feedback method and apparatus for a wireless communication system supporting carrier aggregation or bandwidth extension are provided. A base station sets a CSI request field of an Uplink (UL) grant for scheduling UL transmission on a UL Component Carrier (CC) corresponding to a Downlink (DL) CC of which CSI is requested, to a request value. The UL grant is transmitted to a terminal.

Abstract: A method and apparatus for activating a deactivated Component Carrier in a cellular communication system supporting carrier aggregation. The method includes receiving, from a Base Station (BS), UpLink (UL) scheduling information for a UL CC in a deactivated state; determining whether a DownLink (DL) CC associated with the UL CC is activated; and activating the DL CC, when the DL CC is not activated.

Abstract: A method is provided for controlling retransmission by a User Equipment (UE) in a wireless communication system supporting Multiple Input Multiple Output (MIMO) technology. A plurality of transport blocks is initially transmitted to a Node B. A retransmission request for at least one transport block among the plurality of transport blocks is received from the Node B. A precoding matrix for retransmission of the at least one transport block is determined based on the retransmission request for the at least one transport block. The at least one transport block is retransmitted using the determined precoding matrix.

Abstract: Methods and apparatus are provided for transmitting and receiving data in a communication system with a plurality of antennas. Data and a first pilot are generated. The first pilot is transmitted at a first position in a frequency domain that corresponds to a position of the generated data in the frequency domain and at a first position in a time domain that is with the generated data, in every transmission time interval of the data. A second pilot is generated. The second pilot is transmitted at predetermined second positions in the time domain and the frequency domain, in a transmission time interval that is predefined by a transmitter and a receiver.

Abstract: A method and apparatus for transmitting control information by an enhanced Node B (eNB) in a wireless communication system supporting Multiple-Input Multiple-Output (MIMO) technology is provided, in which at least one parameter required for initial transmission of User Equipment (UE) is transmitted through a Packet Data Control Channel (PDCCH), at least two codewords are received from the UE and then decoded, one of a plurality of indicators, related to an operation of the UE, is determined based on decoding results of at least two codewords, the determined indicator is transmitted through a Physical Hybrid ARQ indicator channel (PHICH), and at least one codeword is received that the UE generates and transmits based on the parameter required for initial transmission of the UE and the indicator related to the operation of the UE.

Abstract: A method and apparatus for transmitting and receiving Downlink Control Information (DCI) in a wireless communication system. A method for transmitting DCI by a base station includes generating DCI including at least one of a data resource allocation indicator, a data format indicator for at least one Transport Block (TB), and a DeModulation Reference Signal (DMRS) resource allocation indicator corresponding to the at least one TB; and sending the DCI to a terminal. The DMRS resource allocation indicator includes a rank pattern for the at least one TB, an allocated scrambling code type, and DMRS port information.

Abstract: A computer system having a plurality of devices including a data storage part which includes a plurality of cells to store data, and a controller to inspect whether there is a defective cell in the data storage part if a condition to execute a cell inspection function is met, and sets the defective cell to be assigned to one of the devices if a defective cell is found.

Abstract: A method and apparatus for communicating over a network is provided. The method includes selecting between location-sensing methods for an LBA, such as between GPS and network triangulation. For each location-sensing method, a dynamic determination is made as to whether the accuracy of the location-sensing method, in the current environment, meets the application requirements. If two or more location-sensing methods meet the application requirements, then, location-sensing method selected is the location-sensing method that, from among the location-sensing methods that meet the application requirement, consumes the least power. Otherwise, the location-sensing method that is most accurate for the current environment is selected.

Abstract: A cooperative beamforming apparatus and method in a wireless communication system supporting channel sensitive scheduling based on feedback information is provided. A beamforming method in a wireless communication system according to the present invention includes transmitting, at a mobile station, a channel condition information of a channel of a serving base station to the serving base station and a channel condition information of a channel of a neighbor base station; and forming, at the serving base station, a beam based on the channel condition information to transmit a signal and, at neighbor base station, a beam to transmit a signal.