Abstract:
Disclosed are a method and an apparatus for setting a reference signal. A wireless apparatus receives a primary synchronization signal (PSS) transmitted by a first orthogonal frequency division multiplexing (OFDM) symbol and a secondary synchronization signal (SSS) from a second OFDM symbol, and can search information for setting a reference signal on the basis of symbol numbers of the first OFDM symbol and the second OFDM symbol. Inter-cell interference can be reduced by means of a variety of methods for setting a reference signal.
Abstract:
The present invention relates to a method of transmitting an acknowledgement/not-acknowledgement (ACK/NACK) and a device for using such a method. According to the present invention, a cell-specific downlink-uplink setting for one of a plurality of serving cells and a reference UL-DL setting is received, an effective downlink sub-frame capable of actually receiving a data unit from one serving cell is determined based on the settings, and only an ACK/NACK for the effective downlink sub-frame is configured as a bit string and fed back.
Abstract:
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for receiving data on user equipment supporting a plurality of types of carriers in the wireless communication system, and to the apparatus for same, the method comprising the steps of: receiving a transmission mode-common (TM-common) downlink control information (DCI) format including downlink scheduling information; and receiving the data through a resource indicated by the downlink scheduling information, wherein the data is modulated by using a user equipment-specific (UE-specific) reference signal when the data is received through a first type of carrier, and the data is modulated through a first cell-common reference signal when the data is received through second type of carrier.
Abstract:
A method of receiving downlink data in a wireless communication system and a wireless device are provided. The wireless device determines energy per resource element (EPRE) of a reference signal that is received in a transmission bandwidth of an orthogonal frequency division multiplexing (OFDM) symbol and determines the power ratio of the EPRE of the reference signal to the EPRE of a Physical Downlink Shared Channel (PDSCH) on the basis of the transmission bandwidth. The wireless device determines the EPRE of the PDSCH on the basis of the EPRE of the reference signal and the power ratio and demodulates the PDSCH.
Abstract:
The present invention relates to a wireless communication system, and more particularly, to a method for a terminal to transmit and receive control information and/or a response signal in a carrier aggregation-based wireless communication system, and to an apparatus therefor, wherein the method includes the steps of: constituting a first cell group having a PCell; constituting a second cell group having at least one SCell; and carrying out a process for transmitting and receiving specific cell-related control information and/or a response signal. The control information and/or the response signal are transmitted and received on the first cell group or the second cell group in the event the first cell group and the second cell group are managed by the same base station. The control information and/or the response signal are transmitted and received on only the first cell group or the second cell group depending on the type of the control information in the event the first cell group and the second cell group are managed by different base stations.
Abstract:
A method and an apparatus of transmitting scheduling request (SR) in a wireless communication system are provided. The method includes configuring a physical uplink control channel (PUCCH) for a SR in a subframe, the subframe comprising a plurality of single carrier-frequency division multiple access (SC-FDMA) symbols, wherein one SC-FDMA symbol on the PUCCH is punctured and transmitting the SR on the PUCCH in the subframe.
Abstract:
The present invention provides a method and apparatus for transmitting data and a method and apparatus for receiving data, wherein said methods transmit/receive a reference signal in sub-frames bundled for data transmission/reception using at least an identical precoding matrix, an identical reference signal sequence, an identical reference signal generating identifier, or an identical reference signal scrambling sequence.
Abstract:
The method for receiving a downlink signal by a user device in a wireless communication system according to one embodiment of the present disclosure comprises: a step of receiving control information relating to semi persistent scheduling via an upper layer signaling or a downlink control channel; and a step of decoding a semi persistent scheduled downlink data channel based on the control information relating to semi persistent scheduling. The method may comprise: a step of using, if the downlink control information receive via the downlink control channel has a first downlink control information (DCI) format, a predetermined first parameter group from among the candidate parameter groups received via the upper layer signaling so as to decode the downlink data channel; and a step of using, if the downlink control information received via the downlink control channel has a second DCI format, a second parameter group indicated by the downlink control information from among the candidate parameter groups received via the upper layer signaling so as to decode the downlink data channel.
Abstract:
The present invention provides a method and an apparatus for performing an open loop MIMO transmission based on a user equipment-specific reference signal (UE-RS), which is transmitted only for data that is allocated to a specific resource region, and provides a method and an apparatus for receiving the open loop MIMO transmission.
Abstract:
A method for receiving downlink data in a wireless communication system is provided. A user equipment receives downlink control information via a downlink control channel in a subframe. The downlink control information includes reference signal (RS) information and physical downlink shared channel (PDSCH) information. The RS information indicates transmission antenna ports, a scrambling identity and a number of transmission layers. The user equipment receives a RS for demodulating a PDSCH based on the RS information in the subframe. The RS is generated based on the scrambling identity. The user equipment receives downlink data via the PDSCH in the subframe. Resource element (RE) mapping information on REs assigned for the PDSCH is determined based on the PDSCH information.