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: The document relates to a method for performing communication using multiple transmission time interval (TTI) structures in a wireless communication system. In this method, a terminal transmits and receives a signal through a resource region in which a first subframe corresponding to a TTI (short TTI) of a first length and a second subframe corresponding to a TTI (short TTI) of a second length longer than the first length are multiplexed in a frequency divisional multiplexing (FDM) manner, and when a second link direction of a signal transmitted through the second subframe in a specific time interval is different from a first link direction of a signal transmitted through the first subframe, the specific time interval of the second subframe is not used for signal transmission in the second link direction.

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: A method for estimating a nonlinear self-interference channel in a wireless channel system, according to the present invention, can further comprise the steps of: applying a first sequence to a first symbol; applying, to a second symbol, a sequence of which a phase is shifted from that of the first sequence by ?/2; and transmitting the first symbol and the second symbol.

Abstract: A method in which a terminal performs a HARQ operation in a NoMA-based system comprises a step of receiving a downlink control information (dci) format comprising a multiple access (MA) signature field for supporting NoMA transmission; a step of receiving downlink data based on a value of the MA signature indicated by the MA signature field; and a step of transmitting an ACK/NACK signal with respect to the downlink data based on a subframe offset value, a frequency offset value, or a sequence index value, which are tied with the indicated value of the MA signature according to a predefined rule, wherein the subframe offset value comprises the subframe offset value between a reception subframe of the downlink data and a downlink HARQ feedback transmission subframe with respect to the downlink data, and wherein the frequency offset value indicates a frequency band used for transmitting the ACK/NACK signal.

Abstract: A method for performing a contention-based non-orthogonal multiple access in a wireless communication system comprises the steps of: selecting a corresponding group from among a plurality of groups for the non-orthogonal multiple access on the basis of a service class of an upper layer; selecting one of a plurality of reference signal sequences and transmitting a reference signal to which the selected reference signal sequence is applied, in a reference signal resource allocated to the selected corresponding group; and transmitting encoded data to which the repetition frequency, corresponding to the selected corresponding group, or a target bit rate is applied.

Abstract: A method for allocating, by a base station, resources in a wireless communication system supporting a full duplex radio (FDR) technology, according to the present invention, may comprise the steps of: receiving, from a first terminal, a buffer status report (BSR) including an indicator which indicates the urgency of uplink data transmission; and determining, on the basis of the indicator, whether to allocate an uplink sub-frame for the first terminal in a situation where a downlink sub-frame is allocated to a second terminal during a specific time interval.

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 of transmitting uplink control information (UCI) by a user equipment in a wireless communication system, includes the steps of receiving downlink control information (DCI) indicating a transmission time of the UCI through a prescribed frequency band in a first subframe, receiving a downlink data based on the DCI, and transmitting UCI associated with the downlink data in a second subframe based on the indicated transmission time of the UCI. In this case, the prescribed frequency band on which the DCI is transmitted is configured by a plurality of DCCUs (downlink control channel units) for transmitting the DCI, and the UCI may be transmitted on an UCCU (uplink control channel unit) in the second subframe, a frequency band of the first UCCU being same as a frequency band corresponding to a DCCU of a lowest frequency among the plurality of DCCUs.

Abstract: A method for performing a Hybrid Automatic Repeat request (HARQ) procedure by a terminal operating in an FDR mode in a wireless communication system comprises the steps of: receiving a downlink signal from a base station; and transmitting feedback information including a NACK signal for the downlink signal to the base station, wherein the feedback information may further include an indicator indicating that the reason for transmitting the NACK signal is that the terminal has failed to remove a self-interference signal.

Abstract: A method for performing self-interference cancellation by a device using an FDR mode comprises a step for performing nonlinear digital self-interference cancellation on the basis of a condition defined for the nonlinear digital self-interference cancellation, wherein the defined condition can comprise information about the order of a self-interference component to be considered for the nonlinear digital self-interference cancellation in correspondence with transmission power of the device.

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: 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: According to an embodiment of the present invention, a method is disclosed for transmitting a signal on the basis of a competition-based non-orthogonal multiple access scheme, by means of a terminal in a wireless communication system. At this time, the method for transmitting a signal comprises: a step of transmitting a first codeword on the basis of the competition-based NoMA scheme; a step of receiving a negative response to the first codeword transmission from a base station; a step of selecting a second codeword, taking into account a magnitude vector and a correlation of the first codeword; and a step of transmitting the selected second codeword on the basis of the competition-based NoMA scheme.

Abstract: A method by which a terminal transmits a scheduling request (SR) in a wireless communication system, according to the present invention, comprises the steps of: receiving information on periodicity of SR transmission and a resource region for periodical SR transmission; receiving downlink control information (DCI) which includes a field related to an SR transmission region in a first subframe; and confirming whether the resource for the SR transmission of the terminal is allocated in the first subframe, even if the first subframe is not the subframe for the periodical SR transmission of the terminal, according to the periodicity of the SR transmission, when a SR field indicates a specific value.

Abstract: A method for performing self-interference cancellation (SIC) by an apparatus of a full duplex radio (FDR) mode in a wireless communication system including: performing a channel estimation of a received self-interference reference signal; calculating a power value of two order components of a non-linear self-interference signal based on the channel estimation; and establishing a non-linear digital self-interference cancellation order to be considered in the self-interference cancellation based on the power value of each for the two order components.

Abstract: A method for receiving orthogonal time, frequency and space (OFTS) basis allocation information by an user equipment in a wireless communication system using an OTFS transmission scheme includes receiving control information including information on an OTFS basis size N from a base station; and receiving data on OTFS bases of a predetermined size indexed according to a pre-defined rule in an N×N OTFS transform matrix on time and frequency domains corresponding to the OTFS basis size, wherein the OTFS bases of the OTFS basis size N is represented into an N×N OTFS transform matrix, wherein in the N×N OTFS transform matrix, a row index represents a cyclic frequency shift index, and a column index represents a cyclic time shift index, wherein the indexing according to the pre-defined rule includes indexing the OTFS bases of the predetermined size in an order such that the cyclic frequency shift and the cyclic time shift in the N×N OTFS transform matrix are maximized.

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: 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 for cancelling self-interference by a base station that uses a full duplex radio (FDR) scheme may comprise the steps of: transmitting, to a terminal, information associated with reference signal (RS) power boosting, which has been changed for estimation of a self-interference channel; transmitting an RS on the basis of the changed RS power boosting; estimating the self-interference channel according to the RS; and cancelling the self-interference on the basis of the estimation of the self-interference channel.