Abstract:
The present invention relates to a wireless communication system. In detail, the present invention relates to a method and apparatus for acquiring system information by a terminal in a wireless communication system, the method comprising the steps of: acquiring time and frequency synchronization from a synchronization channel; performing PBCH detection in a wireless frame on the basis of the time and frequency synchronization; and acquiring the system information from the PBCH, wherein, when the terminal is a non-MTC terminal, the PBCH detection is performed by a singular sub frame in the wireless frame, and when the terminal is an MTC terminal, the PBCH detection is performed by a plurality of sub frames in the wireless frame.
Abstract:
The present invention relates to a method for transreceiving a signal in a wireless communication system supporting repeated transmission of a same signal, and an apparatus for same, and more specifically, to a method and an apparatus for same, the method comprising the steps of: repeatedly transmitting a first physical random access channel (PRACH) signal by using a first PRACH resource, wherein the number of transmissions equal a first repetition number; receiving a random access response (RAR) with respect to the first PRACH signal; and transmitting a second PRACH signal for requesting scheduling, wherein a plurality of PRACH resources are pre-established for transmitting the second PRACH signal, a second plurality of repetition numbers that are different are pre-established for the plurality of PRACH resources, wherein the second PRACH signal is repeatedly transmitted by using the first PRACH resource, wherein the number of transmissions equal a repetition number set for the first PRACH resource, when the first PRACH resource matches one of the plurality of PRACH resources, and wherein the second PRACH signal is repeatedly transmitted by using a PRACH resource corresponding to the first repetition number from among the plurality of PRACH resources, wherein the number of transmissions equal the first repetition number, when the first repetition number matches one of the second plurality of repetition numbers.
Abstract:
According to the present invention, user equipment synchronizes a specific component carrier with an NCT-type component carrier with respect to time and/or frequency. The cell synchronization method for synchronizing predetermined cells by user equipment according to the present invention may include receiving reference cell information relating to a first synchronization reference cell for the predetermined cells, acquiring first synchronization information from the first synchronization cell based on the reference cell information, and performing the synchronization of the predetermined cells based on the first synchronization information.
Abstract:
A method for and apparatus for configuring a reference signal (RS) in a wireless communication system supporting multiple carriers is provided. A wireless device configures a new RS subframe at a periodicity among other subframes not including the new RS, identifies the new RS in the subframe which is a different subframe from the other subframes for legacy RS signals, and performs at least one of frequency or timing tracking using the new RS, wherein a frequency density of the new RS in the subframe is located with at least 3 resource element each other. And, this invention includes that RS signals and controls for multi-CCs are provided more accurately and efficiently.
Abstract:
The present specification provides a reception method of a machine type communication (MTC) device. The reception method can comprise the steps of: receiving a control channel through the entire system bandwidth on first and second orthogonal frequency division multiplexing (OFDM) symbols of a subframe; and determining whether to receive a data channel only in a reduced bandwidth compared with the system bandwidth from the third symbol of the subframe. At this point, when the control channel does not continue up until a third symbol of the subframe, the data channel can be received in a reduced bandwidth compared with the system bandwidth from the third symbol of the subframe.
Abstract:
The present invention provides a method and a device for transmitting or receiving channel state information (CSI). According to the present invention, when a user equipment can be set with one or more CSI processes per serving cell, a CSI request field included in downlink control information for a specific serving cell indicates at least whether a non-periodic CSI report triggered by the CSI request field is triggered for a set of CSI process(es) set by a higher layer from among the CSI process(es) for the one serving cell.
Abstract:
A method for and apparatus for configuring a reference signal (RS) in a wireless communication system supporting multiple carriers is provided. A wireless device configures a new RS subframe at a periodicity among other subframes not including the new RS, identifies the new RS in the subframe which is a different subframe from the other subframes for legacy RS signals, and performs at least one of frequency or timing tracking using the new RS, wherein a frequency density of the new RS in the subframe is located with at least 3 resource element each other. And, this invention includes that RS signals and controls for multi-CCs are provided checking conflicts between the more accurately and efficiently.
Abstract:
The base station of the present invention notifies a user device of a first set of cells and a set of parameters corresponding respectively to the cells of the first set of cells, and notifies the user device of a second set of cells that is a subset of the first set of cells and that is associated with the user device. The user device may receive a downlink signal or transmit an uplink signal by sing one of the sets of parameters associated with the second set of cells.
Abstract:
The present invention relates to a method and user device for transmitting first ACK/NACK information on a first cell group including a primary cell and one or more secondary cells from among a plurality of serving cells on a physical uplink control channel (PUCCH) of a specific cell in the first cell group, and to a method and base station for receiving the first ACK/NACK information on the PUCCH of the specific cell. When the first ACK/NACK information includes only ACIQNACK for the primary cell, the specific cell is the primary cell, and, when the first ACK/NACK information includes ACK/NACK on at least one of the one or more secondary cells, the specific cell is a secondary cell from among the one or more secondary cells of the first cell group that is set for the ACK/NACK transmission.
Abstract:
The present invention relates to subframe configuration information for half duplex frequency duplex (HD-FDD) or time division duplex (TDD). The subframe configuration indicates which of a predefined plurality of continuous subframes is a subframe for downlink reception, which of the plurality of contiguous subframes is a subframe for uplink transmission, or which of the plurality of contiguous subframes is a special subframe that includes at least one OFDM symbol for the downlink reception and at least one OFDM symbol for the uplink transmission.