Abstract: Provided are a method and an apparatus for transmitting uplink data in a wireless communication system. Specifically, a first terminal transmits a random access preamble for requesting a connectionless transmission. The first terminal receives a random access response comprising scheduling information of the uplink data. The first terminal transmits uplink data and a reference signal from a first resource configured on the basis of scheduling information of the uplink data and information indicating the CP length of the reference signal. The CP length of the reference signal can be configured to be identical to the CP length of the random access preamble. The first resource can correspond to a resource utilized by both the first terminal and second terminal.

Abstract: In this specification, a method of performing a hybrid automatic request (HARQ) in a wireless communication system is performed by a user equipment, and includes receiving first data from a first eNB through a first radio link; receiving second data from at least one second eNB through a second radio link; combining the first data and the second data; decoding the combined data; and feedbacking the results of the decoding through at least one of the first radio link or the second radio link.

Abstract: A method for encoding a quasi-cyclic low-density parity-check (LDPC) code according to an embodiment of the present invention may comprise the steps of: generating a multi-edge LDPC code matrix including a high rate code matrix and a single parity check code matrix; and encoding a signal by using the multi-edge LDPC code matrix, wherein the single parity check code matrix includes a first matrix having a non-row-orthogonal structure matrix and a second matrix having a pure row-orthogonal structure, which are concatenated.

Abstract: The present specification may provide a method for transmitting/receiving data in a wireless communication system, the method being performed by a terminal and comprising the steps of: transmitting, to one or more alternative base stations having an alternative link configured, an activation request message for requesting the activation of the alternative link into a signaling radio bearer (SRB) active state; receiving, from the one or more alternative base stations as a response to the activation request message, an activation response message comprising load status information of the one or more alternative base stations; on the basis of the load status information, determining a serving base station candidate for activating the alternative link into the SRB active state; and transmitting, to the determined serving base station candidate, an activation completion message indicating that the alternative link has been activated into the SRB active state.

Abstract: A method for a device to perform a transmission in a wireless communication system, includes receiving a plurality of transmit power control (TPC) commands, determining a transmit power of a physical uplink shared channel (PUSCH) using one of the plurality of TPC commands, based on a corresponding PUSCH type, and transmitting the PUSCH using the determined transmit power, wherein each one of the plurality of TPC commands is related with a respective one of PUSCH types, and the PUSCH types are related with PUSCH lengths.

Abstract: Provided are method and device for transmitting/receiving a downlink signal. A user equipment-specific reference signal (UE-RS) can be transmitted to a user equipment. A downlink control channel and a downlink data channel for the user equipment can share the UE-RS. Antenna port information about a transmission antenna port of the downlink control channel and/or a transmission antenna port of the downlink data channel is provided to the user equipment. The user equipment receives UE-RS(s) corresponding to the antenna port information and thus receives the downlink control channel and the downlink data channel.

Abstract: The present invention relates to a method and an apparatus for transmitting and receiving data by a base station in a wireless communication system. The present invention may provide a method and an apparatus which performs establishing a first session for transmitting and receiving data to and from a first network node; receiving uplink data for providing a specific service from a UE in a connected or unconnected state; allocating a first UE identifier to identify the UE by a second network node; and transmitting the uplink data to the second network node together with the first UE identifier and a base station identifier for identifying the base station.

Abstract: A method for performing a security procedure by a terminal in a wireless communication system, and an apparatus thereof. The method includes transmitting a first access request message for accessing a first network of a core network to a first radio access network (RAN) node, performing an authentication procedure for mutual authentication with a node performing an authentication server function (AUSF) of the core network, generating a common key commonly used in one or more networks included in the core network based on an authentication vector obtained through the mutual authentication procedure, generating a first base key of the first network based on the common key and a network code corresponding to a type of the first network, and receiving an access accept message indicating an access accept of the first network from the first RAN node.

Abstract: The present specification discloses a method for executing a hybrid automatic request (HARQ) in a wireless communication system, the method, which is executed by a terminal, comprising the steps of: receiving an initial HARQ packet corresponding to a specific HARQ process ID (PID) from a first base station via a first wireless link; receiving a retransmission HARQ packet corresponding to the HARQ PID from a second base station via a second wireless link; combining the initial HARQ packet and the retransmission HARQ packet; decoding the combined HARQ packet; and, on the basis of the result of the decoding, determining whether to transmit HARQ feedback via the first wireless link.

Abstract: The present invention relates to a method and a device for allowing a transmitting device to transmit/receive data to/from a receiving device in a wireless communication system. According to the present invention, provided are a method and a device, the method: re-configuring specific data in a second layer of the first transmitting device on the basis of a resource allocation amount delivered from a first layer of the first transmitting device; generating at least one replicate data according to the number of a plurality of wireless bearers by using the re-configured specific data in the second layer; and transmitting, to the receiving device, the re-constructed specific data and the at least one replicate data from a plurality of cells related to the plurality of wireless bearers, wherein the plurality of wireless bearers are instructed by bearer identifiers to transmit the replicate data.

Abstract: A method and device for receiving a signal in a wireless communication system to which a multiplex transmission technique is applied are provided. The wireless communication system proposed herein suggests a method for increasing the receipt reliability of a terminal with respect to a multiplex transmission activation indicator indicating the start of multiplex transmission. Particularly, a terminal checks the receipt of a multiplex transmission activation indicator transmitted, from a first base station, for every predetermined subframe. If the terminal succeeds in receiving the multiplex transmission activation indicator, an ACK signal associated with the multiplex transmission activation indicator is transmitted to the first base station. Here, the multiplex transmission activation indicator indicates that the first base station and a second base station are capable of transmitting the same data for a predetermined time together.

Abstract: A method for a distributed antenna-based communication device to perform communication based on inter-panel interference may comprise: a step of measuring interference between transmission beams of a transmission panel and reception beams of a reception panel; a step of configuring inter-panel beam pair information by pairing the beams of the transmission panel and the beams of the reception panel on the basis of the measurement; and a step of transmitting the inter-panel beam pair information to a base station or an adjacent communication device.

Abstract: Disclosed are a method for dividing a transport block of a low density parity check (LDPC) code and an apparatus therefor. A method for dividing a transport block of an LDPC code according to the present disclosure can improve the performance of the LDPC code by dividing the transport block using a minimum number of code blocks. In addition, it is possible to minimize shortening bits by making the size of some of the code blocks smaller than the size of the other code blocks. Further, it is possible to prevent performance degradation due to a minimum size code block by minimizing the number of the code blocks and performing shortening on a large size code block.

Abstract: The present invention relates to a method and an apparatus for generating a signal for low latency in a wireless communication system. The method, according to one embodiment of the present invention, for a communication device generating a situation-reporting signal for low latency and transmitting the signal to a base station in a wireless communication system comprises the steps of: generating the situation-reporting signal on the basis of a pre-set, specific situation recognized by the communication device; and transmitting the generated situation-reporting signal to the base station, wherein the situation-reporting signal may be generated so as to have a subcarrier spacing which is a pre-set number of times larger than a subcarrier spacing of a legacy communication system, the pre-set number being an integer.

Abstract: Provided are a method and an apparatus for obtaining a downlink synchronization in a wireless communication system. A proposed wireless communication system has an environment in which a resource position of a downlink synchronization signal is changed as multi-numerology is applied thereto. Specifically, a terminal transmits a preamble for requesting a synchronization signal transmission resource to a base station. The terminal receives a response signal to the preamble from the base station. Here, the terminal does not have linkage to the base station, and is downlink synchronized with the base station. The response signal includes position information of a synchronization signal transmission resource of a neighboring base station.

Abstract: A sensing gap is configured among cells for inter-cell interference coordination (ICIC) mechanism. A network node listens on a reservation signal in the sensing gap from a neighbor cell, and upon listening on the reservation signal, performs downlink (DL) transmission to a user equipment (UE) or uplink (UL) reception from the UE in a cell.

Abstract: A method and apparatus for transmitting and receiving data in a wireless communication system that supports a low latency service are provided. A terminal may transmit a request message for transmission and reception of low latency service data in an idle state to a base station and receive a response message including resource information related to transmission and reception of the low latency service data in response to the request message from the base station to transmit and receive the low latency service data.

Abstract: A method and apparatus for performing a downlink (DL) transmission using a short transmission time interval (TTI) is provided. A network performs a first DL transmission via a first set of subframes which are multicast-broadcast single-frequency network (MBSFN) subframes, and performs a second DL transmission via a second set of subframes using the short TTI. A length of the short TTI is less than 1 ms.

Abstract: A quasi-cyclic low density parity check (QC LDPC) code rate matching method is disclosed. According to the rate matching method in the present disclosure, the minimum lifting value can be selected from among lifting values by which a codeword longer than a target code block can be generated. A coding gain through retransmission can be acquired by generating the codeword that is longer than the target code block. In addition, by selecting a lifting value of a proper magnitude, rate matching for information bit sequences of various lengths can be performed.

Abstract: Disclosed in the present application is a method for a terminal performing a random access procedure in a wireless communication system. Specifically, the method for performing a random access procedure comprises the steps of: transmitting, to a base station, a plurality of random access signals corresponding to a plurality of different beams in a transmission interval corresponding to the corresponding random access signal; receiving a random access response signal corresponding to one random access signal of the plurality of random access signals; and transmitting and receiving a signal to and/or from the base station, using a beam corresponding to the one random access signal, wherein the plurality of random access signals comprise identifier information of the terminal.