Abstract: Disclosed is an uplink communication method for: receiving data through an mmWave downlink from an mmWave base station; transmitting, to the mmWave base station, an ACK/NACK reply to the data and an mmWave uplink reference signal through an mmWave uplink; receiving, from the mmWave base station, an indicator indicating use of a legacy uplink instead of the mmWave uplink; shortening the length of a legacy TTI to correspond to the length of an mmWave TTI according to the indicator; and communicating with the mmWave base station through the legacy uplink using the shortened legacy TTI.

Abstract: A method for a terminal for detecting data transmitted according to the multiuser superposition transmission system comprises the steps of: receiving, from a base station, downlink control information comprising information for a codeword subset selected form a non-orthogonal codebook comprising an orthogonal subset and non-orthogonal subset; estimating a channel on the basis of a reference signal symbol or reference signal pattern corresponding to the selected codebook subset; and, on the basis of the channel estimation, detecting desired data symbols on the basis of the selected codebook subset, wherein the superposed data symbols are symbols comprising data not only for the terminal but also for other terminals.

Abstract: In an aspect of the present invention, provided is a method for receiving an uplink signal by a base station (BS) in a wireless communication system where a reference signal is not used, including: obtaining information bits by demodulating and decoding a signal of a first user equipment (UE) that is modulated through a differential modulation scheme; estimating a channel between the first UE and the BS using the information bits; and performing successive interference cancellation (SIC) using the signal of the first UE restored through the channel estimation results and the information bits. In this case, the BS may estimate the channel between the first UE and the BS by assuming that an Nth modulation symbol among modulation symbols of the information bits modulated through the differential modulation scheme is fixed to a predetermined constellation point.

Abstract: Provided are a method and an apparatus for competition-based transmitting of uplink data in a wireless communication system to which a non-orthogonal multiple access scheme is applied. Particularly, a terminal receives, from a base station, information relating to a predefined codeword for non-orthogonal multiple access. The predefined codeword includes a first spreading code and a second spreading code. The terminal configures a base layer using the first spreading code and configures an enhancement layer using the second spreading code. The terminal transmits a terminal identifier and data to the base station through a competition-based resource which overlappingly uses the base layer and the enhancement layer, wherein the terminal identifier is transmitted through the base layer and the data is transmitted through the enhancement layer.

Abstract: A method for a base station processing in-band multiplexing using an FCP-OFDM scheme may comprise the steps of: transmitting, to a terminal, information on the length of zero padding (ZP) for a receiving side and the length of ZP for a transmitting side in a band for a first service among one or more services provided in one carrier; and on the basis of the information on the length of ZP for a receiving side and the length of ZP for a transmitting side, processing a signal of the first service in the transmitting end or receiving end of the base station.

Abstract: A data retransmission method for a polar code, and a device therefor are disclosed. The data retransmission method of the disclosure can comprise the steps of: generating a first data block by allocating a plurality of data bits to input bits, with high priorities, among input bits of a polar code encoding module on the basis of a target encoding rate; transmitting the generated first data block; generating a second data block by allocating first data bits among the plurality of data bits to input bits, with low priorities, among the input bits of the polar code encoding module, on the basis of the target encoding rate and shortening bits; and transmitting the generated second data block as a retransmission of the first data block.

Abstract: Provided are a method and an apparatus for competition-based transmitting of uplink data in a wireless communication system to which a non-orthogonal multiple access scheme is applied. Particularly, a UE receives, from a base station, information relating to a contention zone. The information relating to the contention zone includes predefined contention zone patterns and predefined terminal classes. The terminal selects a terminal class for the terminal from among the predefined terminal classes. The terminal selects a contention zone pattern for the terminal from among the predefined contention zone patterns on the basis of the selected terminal class. The uplink data is transmitted to the base station through a plurality of contention zones included in the selected contention zone pattern.

Abstract: According to the present invention, a method by which a communication device receives ACK/NACK can comprise the steps of: checking transport block (TB) cyclic redundancy check (CRC) after performing channel decoding on received data; and determining whether the terminal has received an ACK signal or has received a NACK signal, according to the TB CRC checking result.

Abstract: A method for transmitting uplink (UL) data requiring low latency in a wireless communication system according to the present invention, the method performed by a user equipment comprises transmitting contention PUSCH resource block (CPRB) indication information used for identifying a particular UE and/or particular data to an eNB; transmitting UL data to the eNB through CPRB resources of a contention based PUSCH (CP) zone; and receiving a hybrid automatic retransmit request (HARQ) response with respect to the UL data from the eNB through a physical hybrid ARQ indicator channel (PHICH).

Abstract: A method for user equipment to perform uplink communication in a wireless communication system comprises a step of performing communication using a codebook corresponding to a selected modulation method, wherein the codebook may be a codebook defined for communication based on non-orthogonal coded multiple access (NCMA).

Abstract: A method and a device for performing a random access in a wireless communication system are provided. Specifically, a wireless resource for transmitting a first random access request is selected, and the first random access request is transmitted through the wireless resource. The first random access request includes a transmission period of the first random access request, the frequency of retransmission, and an allowable error of the transmission period. Uplink resource allocation information is received in response to the first random access request. The uplink resource allocation information includes information on an indicator bit and a wireless resource shift. When the indicator bit is a preset value, a second random access request is transmitted through a wireless resource shifted from the wireless resource.

Abstract: A communication apparatus for eliminating a self-interference signal in an FDR environment comprises: a distributor for distributing signals from a transmission chain to a plurality of lines in a receiving chain; a first self-interference signal replicating unit for generating a self-interference replica signal of a signal distributed to a first line from among the plurality of lines by the distributor; a second self-interference signal replicating unit for generating a self-interference replica signal of a signal distributed to a second line from among the plurality of lines by the distributor; and a self-interference eliminating unit for eliminating self-interference by deducting, from the signals distributed by the distributor, a signal generated by the first self-interference signal replicating unit and a signal generated by the second self-interference signal replicating unit.

Abstract: A method by which a terminal transmits a random access channel (RACH) signal in a wireless communication system comprises the step of transmitting the RACH signal to a base station according to an RACH format corresponding to a specific RACH subframe among previously defined RACH formats, wherein the method is configured such that a start point or an end point of the RACH signal in a time domain is differentiated according to whether a downlink control zone and an uplink control zone within the RACH subframe are punctured in a specific frequency band between the previously defined RACH formats.

Abstract: Disclosed are a method for transmitting and receiving, between a terminal and a base station, a control channel including control information, and a device for supporting the same. Particularly, disclosed in the present invention are: a method for transmitting and receiving a control channel, if a subcarrier spacing or fast Fourier transform (FFT) size of the control channel including control information is different from the subcarrier spacing or FFT size of a data channel including data; and a device for supporting the same.

Abstract: Disclosed is a signal transmission method. The signal transmission method includes the steps of: setting a default value for generating a beamforming vector to be used for precoding; performing a calculation process of an outer layer for determining whether an accuracy of an energy efficiency satisfies a first threshold value range during a dual layer calculation process for maximizing an energy efficiency of a base station; performing a calculation process of an inner layer for calculating a predetermined second threshold value on which deterministic equivalence of a channel gain matrix coverage; generating a beamforming vector on the basis of values used in the calculation process of the outer layer and the calculation process of the inner layer, when the accuracy of the energy efficiency satisfies the first threshold value range in the calculation process of the outer layer; generating a transmission signal using the beamforming vector; and transmitting the generated transmission signal.

Abstract: A method for a drone to measure a location of a user equipment in a wireless communication system can be provided according to one embodiment of the present specification. In this case, the method can include the steps of performing an initial access procedure with a base station, receiving SRS configuration information of the user equipment from the base station, receiving an SRS from the user equipment based on the SRS configuration information of the user equipment, and transmitting location measurement information, which is measured based on the received SRS, to the base station.

Abstract: A method for transmitting information related to a sounding reference signal (SRS) transmission by a base station (BS) of a full duplex radio (FDR) mode in a wireless communication system includes: transmitting information related to a resource region to be used for the SRS transmission to a user equipment of the FDR mode within a resource region configured as an uplink (UL) idle interval; receiving a SRS through the resource region for the SRS transmission from the user equipment; performing an uplink (UL) channel estimation based on the received SRS; and performing a downlink (DL) channel estimation by applying a channel reciprocity characteristic to a result of the uplink (UL) channel estimation.

Abstract: Disclosed herein is a method of transmitting a signal at a relay user equipment (UE) in a wireless communication system. The method includes receiving uplink data for relay from a first UE, performing superposition coding with respect to the uplink data and sidelink data to be transmitted to a second UE through a sidelink to generate an uplink relay signal, and transmitting the uplink relay signal to a base station and the second UE.

Abstract: This method for a communication device to transmit/receive signals by using a TDD scheme in a wireless communication system may comprise the steps of: receiving information related to a guard period (GP) position in a data zone of a particular subframe; receiving downlink data in the data zone of the particular subframe on the basis of the information related to the GP position; and transmitting uplink data in the data zone of the particular subframe on the basis of the information related to the GP position.

Abstract: A method for receiving, by a terminal, a signal in a wireless communication system comprises: a step of receiving, from a base station, information indicating a subframe configuration type of subframes bundled into a plurality of subframe units; and a step of receiving, from the base station, a signal of a service corresponding to the indicated subframe configuration type in the bundled subframes, wherein the subframe configuration type of the bundled subframes is determined on the basis of the characteristics of the service to be provided from the bundled subframes.