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: An embodiment of the present specification may provide a method for performing positioning using a drone by a terminal in a wireless communication system. The method for performing positioning using a drone by a terminal may comprise the steps of: transmitting information on a drone-positioning reference signal (D-PRS) configuration to a base station; receiving the D-PRS configuration information from the base station; receiving a positioning reference signal (PRS) from the base station and receiving the D-PRS from the drone; obtaining position-related information of the terminal on the basis of the PRS and the D-PRS; and transmitting the position-related information to the base station. The terminal is capable of communicating with at least one of another terminal, a terminal related to an autonomous driving vehicle, a base station or a network.

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 transmitting feedback information by a terminal may comprise: multiplying each of a left side and a right side of a matrix, which is related to a channel measured by the terminal, by a transformation matrix, so as to obtain a first matrix; performing a first transformation which transforms elements other than a predetermined number of elements having a larger size among elements of the first matrix to zero, or performing a second transformation which transforms elements other than elements exceeding a threshold value to zero, so as to obtain a second matrix; quantizing the second matrix so as to obtain a third matrix; configuring a vector by selecting a specific portion in the third matrix according to a predetermined pattern; configuring, into bits, an output obtained by multiplying the configured vector by a sensing matrix for compression sensing; and transmitting the output bits to a base station.

Abstract: A method for transmitting feedback information by a terminal may comprise the steps of: measuring a channel; multiplying a first matrix associated with the measured channel by a transformation matrix, so as to obtain a second matrix and transmitting the obtained second matrix to a base station in a bit format. In addition, the transformation matrix may be determined on the basis of an angle offset satisfying a predetermined condition.

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 modulation pattern for non-orthogonal multiple access. The information relating to the predefined modulation pattern includes a modulation pattern index. The modulation pattern index indicates designation of a terminal-specific modulation order for each resource element in a resource used overlappingly by multiple terminals. The terminal transmits data to the base station using the modulation order designated to each of the resource elements on the basis of the information relating to the predetermined modulation pattern.

Abstract: The method for feedback for broadcast- or multicast-based device-to-device communication in a wireless communication system, according to one embodiment of the present disclosure, is performed by a first terminal and may comprise the steps of: determining whether or not a collision has occurred in data received from a counterpart terminal; and in response to the determination that a collision has occurred, transmitting feedback information, including collision resource information and terminal operation information, to the counterpart terminal.

Abstract: A method for allocating resources by a Base Station (BS) in a wireless communication system is disclosed. The method includes configuring a Resource Block Group (RBG) dependent on whether a User Equipment (UE) operates in Full Duplex Radio (FDR) mode or Half Duplex (HD) mode, and allocating resources to the UE in units of the configured RBG. The RBG includes a plurality of Resource Blocks (RBs).

Abstract: A method for a communication apparatus selectively operating a duplex mode in a wireless communication system may comprise the steps of: operating in a half-duplex radio (HDR) mode in a resource including a physical channel or a signal used for initial access prior to radio resource control (RRC) connection; and operating in a full duplex radio (FDR) mode after the initial access.

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: 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.

Abstract: A method and a device for performing communication by using a non-orthogonal code multiple access scheme in a wireless communication system are provided. Particularly, a terminal receives control information from a base station. The terminal modulates or demodulates a terminal-specific NCC on the basis of the control information. The terminal performs the non-orthogonal code multiple access scheme by using the terminal-specific NCC. The control information includes information on a codeword composed of a Grassmannian sequence. The codeword is included in a codebook predefined for the non-orthogonal code multiple access scheme. Each coefficient of the Grassmannian sequence is quantized on the basis of an M-quadrature amplitude modulation (M-QAM) constellation.

Abstract: A user equipment (UE) receives UE group information indicating a first UE group to which the UE belongs, and transmits uplink (UL) data and a demodulation reference signal (DM-RS), which is for demodulating the UL data, on the basis of the UE group information. The DM-RS is transmitted by means of a first uplink demodulation reference signal (UL DM-RS) resource, which corresponds to the first UE group to which the UE belongs, among a plurality of UL DM-RS resources respectively corresponding to one or more UE groups.

Abstract: A method by which a base station reduces an operation for removing self-interference in an FDR environment can comprise the steps of receiving estimated channel state information from a terminal, determining a beam forming value for transmission beamforming on the basis of the received channel state information, and transmitting a downlink signal by applying the determined beamforming value.

Abstract: The method for feedback of channel quality information in a wireless communication system, according to one embodiment of the present invention, is performed by a terminal and comprises the steps of: receiving feedback configuration information, including information on disjoint segmentation indicating the indexes of channel or beam quality-related parameters for broadcast or multicast services, from a base station; and according to the information on disjoint segmentation in the feedback configuration information, encoding the index of a channel or beam quality-related parameter to be reported and transmitting same to the base station, wherein the disjoint segmentation includes multiple subsets which do not overlap and which have different lengths, and the index of the channel or beam quality-related parameter, which is transmitted to the base station, may indicate a predetermined value in one subset among the multiple subsets.

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: Provided is a non-orthogonal multiple access method, which: randomly selects a physical resource for performing non-orthogonal multiple access among the contention-based data transmission areas defined in advance; selects a reference signal sequence for a contention-based data transmission through the selected physical resource; selects a contention resource for the contention-based data transmission; selects a scrambling sequence to be applied to data transmission in the contention-based data transmission; and transmitting a data channel including data and a reference signal corresponding to the selected reference signal sequence through the selected physical resource, wherein the data channel is transmitted by allowing the selected scrambling sequence to be applied thereto.

Abstract: A method for performing, by a terminal, a contention-based uplink transmission in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: selecting any one of a plurality of codewords and any one of a plurality of demodulation reference signals (DMRS), the plurality of codewords and the plurality of DMRSs being set in a contention resource area for a contention-based uplink transmission; and transmitting, through the contention resource area, uplink data that corresponds to the selected codeword, and the selected DMRS, wherein the DMRS is transmitted in an orthogonal multiple access (OMA) scheme, the uplink data is transmitted in a non-orthogonal multiple access (NOMA) scheme, and the selected DMRS is one of the K DMRSs mapped to the selected codeword, wherein K may be an integer greater than or equal to 1, which is changed according to a DMRS collision occurring in the contention resource area.

Abstract: According to one embodiment, a method by which a terminal transmits a signal in a wireless communication system on the basis of a contention-based non-orthogonal NOMA scheme can be provided, wherein the method for transmitting the signal can comprise the steps of: allocating a resource pool to which a signal is to be transmitted on the basis of the contention-based NOMA scheme; and transmitting data and a UE ID through the resource pool on the basis of the contention-based NOMA scheme, wherein a plurality of UE ID regions exist in the resource pool, and the UE ID can be allocated to a first region, which is one of the plurality of UE ID regions, and then transmitted.

Abstract: A method by which a terminal transmits feedback information comprises the steps of: determining, in predetermined resource units for receiving the broadcast information in a broadcast resource region, whether broadcast information collides; selecting a first shared resource in a shared resource region corresponding to a first broadcast resource in which the conflict occurs in the broadcast resource region, on the basis of a pre-defined mapping rule of the broadcast resource region and the shared resource region; and transmitting, in the selected first shared resource, feedback information including information on the occurrence of the collision, wherein the broadcast resource region is a resource region, which is defined so as to transmit or receive the broadcast information, and the shared resource region can be determined as a resource region shared between a plurality of terminals.