Abstract: An operation method of a terminal in a communication system may comprise: receiving downlink control information (DCI) for scheduling uplink transmission from a base station; identifying a communication node initiating a channel occupancy time associated with the uplink transmission based on a channel access parameter included in the DCI; and performing the uplink transmission scheduled by the DCI within the channel occupancy time initiated by the communication node, wherein the communication node is the terminal or the base station.

Abstract: An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal; a power normalizer configured to reduce power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing time-interleaving that is applied to both the core layer signal and the enhanced layer signal; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling start position information and size information for each of Physical Layer Pipes (PLPs). In this case, the Physical Layer Pipes include a core layer physical layer pipe corresponding to the core layer signal and an enhanced layer physical layer pipe corresponding to the enhanced layer signal.

Abstract: An operation method of a terminal in a communication system may comprise: receiving downlink control information (DCI) for scheduling uplink transmission from a base station; identifying a communication node initiating a channel occupancy time associated with the uplink transmission based on a channel access parameter included in the DCI; and performing the uplink transmission scheduled by the DCI within the channel occupancy time initiated by the communication node, wherein the communication node is the terminal or the base station.

Abstract: A method of a first terminal may comprise: receiving a higher layer message including basic sidelink synchronization signal block (S-SSB) information on a basic S-SSB transmitted in an unlicensed band; obtaining a channel occupancy time (COT) through a listen-before-talk (LBT) procedure in the unlicensed band; and transmitting COT information including additional S-SSB configuration information to other terminals, wherein the basic S-SSB information includes information on a transmission occasion of the basic S-SSB and information on a frequency of the basic S-SSB, and the additional S-SSB configuration information includes information for transmission of an additional S-SSB that is transmitted in addition to the basic S-SSB within the COT.

Abstract: Disclosed are signal transmission methods and apparatuses in sidelink communication. A method of a terminal may comprise: receiving sidelink (SL) configuration information from a base station; identifying cyclic prefix extension (CPE) information indicating one or more CPE start positions included in the SL configuration information; configuring a CPE based on the CPE information; and performing SL transmission including the CPE.

Abstract: Disclosed herein are a broadcast node and a method for dynamically managing radio resources and heterogeneous network connectivity. The broadcast node is installed for a transmitter of an intelligent broadcast/broadband network, wherein the broadcast node is configured to generate an attribute message including an associated identification parameter for connection to a broadcast core network, and initiate a series of communication protocols for connection with additional intelligent entities, and manage a service request queue, a radio resource, an interface, and one or more services.

Abstract: A modulator and a modulation method using a non-uniform 16-symbol signal constellation are disclosed. The modulator includes a memory and a processor. The memory receives a codeword corresponding to a low-density parity check (LDPC) code having a code rate of 4/15. The processor maps the codeword to 16 symbols of the non-uniform 16-symbol signal constellation on a 4-bit basis.

Abstract: An apparatus and method for transmitting broadcast signal to which channel bonding is applied are disclosed. The apparatus according to the present invention includes an input formatting unit configured to generate baseband packets corresponding to a plurality of packet types using data corresponding to a physical layer pipe; a stream partitioner configured to partition the baseband packets into a plurality of partitioned streams corresponding to the plurality of packet types; BICM units configured to perform error correction encoding, interleaving and modulation corresponding to the plurality of partitioned streams, respectively; and waveform generators configured to generate RF transmission signals corresponding to the plurality of partitioned streams, respectively.

Abstract: A low density parity check (LDPC) encoder, an LDPC decoder, and an LDPC encoding method are disclosed. The LDPC encoder includes first memory, second memory, and a processor. The first memory stores an LDPC codeword having a length of 16200 and a code rate of 3/15. The second memory is initialized to 0. The processor generates the LDPC codeword corresponding to information bits by performing accumulation with respect to the second memory using a sequence corresponding to a parity check matrix (PCM).

Abstract: An operation method of a terminal in a communication system may comprise: receiving, from a base station, a higher layer message including information indicating that first DCI including a HARQ feedback enabled/disabled indicator is configured; receiving the first DCI from the base station; receiving first downlink data from the base station based on first scheduling information included in the first DCI; and determining whether to transmit a first HARQ response for the first downlink data based on the HARQ feedback enabled/disabled indicator included in the first DCI.

Abstract: An operation method of a terminal in a communication system may comprise: performing a monitoring operation to receive BWP configuration information for common downlink communication; in response to receiving the BWP configuration information from the base station, configuring a common frequency region for the common downlink communication based on the BWP configuration information; receiving DCI including scheduling information of the common downlink communication from the base station; and performing the common downlink communication with the base station in the common frequency region by using a frequency resource indicated by the scheduling information, wherein the common downlink communication is communication between the base station and a plurality of terminals including the terminal.

Abstract: Disclosed herein are a broadcast signal transmission/reception method using multiple antennas and layered-division multiplexing and an apparatus for the same. A broadcast signal transmission apparatus includes a Multiple-Input Multiple-Output (MIMO) Bit-Interleaved Coded Modulation (BICM) unit for dividing enhanced layer data into two enhanced layer signals having different polarizations, a combination unit for generating a multiplexed signal corresponding to a first transmitting antenna by combining a core layer signal corresponding to core layer data with a first enhanced layer signal, and transmission signal generation units for generating a first transmission signal, corresponding to the multiplexed signal and transmitted through the first transmitting antenna, and a second transmission signal, corresponding to a second enhanced layer signal and transmitted through a second transmitting antenna.

Abstract: Disclosed herein are a method for processing a retransmission broadcast signal using multi-antenna signals based on channel bonding and an apparatus for the same. The apparatus includes a stream multiplexing (muxing) unit for generating a single piece of input data from signals received from two or more reception channels, an input formatting unit for converting the input data into a Physical Layer Pipe (PLP), a stream partitioning unit for segmenting the physical layer pipe into pieces of data to be respectively transmitted over two or more transmission channels, and two or more retransmission-signal-processing units for retransmitting the pieces of data to the respective transmission channels corresponding thereto through multiple transmission antennas.

Abstract: Disclosed herein are a content provision method and apparatus using a convergence network. The content provision method may include creating a Quick UDP Internet Connections V1 (QUICV1) path with User Equipment (UE) through a Fifth-Generation (5G) core, when content satisfies a preset condition while the content is being provided to the UE through the QUICV1 path, determining to offload the content through the 5G core, creating an Internet Protocol Security (IPSEC) tunnel with an Advanced Television Systems Committee (ATSC) gateway (GW) through the 5G core, generating a QUIC multicast stream, providing QUIC multicast session information to multiple UE devices, and providing the content to multiple UE devices, for which a mode switches from a QUICV1 mode to a QUIC multicast mode, through the ATSC GW.

Abstract: An apparatus and method for multiplexing signals using layered division multiplexing are disclosed. A signal multiplexing apparatus according to an embodiment of the present invention includes a combiner configured to combine a core layer signal and an enhanced layer signal at different power levels, and a time interleaver configured to perform interleaving applied to both the core layer signal and the enhanced layer signal.

Abstract: An apparatus for transmitting a broadcast signal according to an embodiment of the present invention includes a bootstrap generation unit for generating a bootstrap for signaling a system bandwidth field, corresponding to a system bandwidth for a post-bootstrap, and a baseband sampling rate coefficient; a preamble generation unit for generating a preamble located immediately following the bootstrap in a broadcast signal frame; and a payload generation unit for generating one or more subframes located immediately following the preamble in the broadcast signal frame. Here, the preamble may include L1 signaling data, and the L1 signaling data may include a reduced carrier coefficient.

Abstract: A bit interleaver, a bit-interleaved coded modulation (BICM) device and a bit interleaving method are disclosed herein. The bit interleaver includes a first memory, a processor, and a second memory. The first memory stores a low-density parity check (LDPC) codeword having a length of 64800 and a code rate of 7/15. The processor generates an interleaved codeword by interleaving the LDPC codeword on a bit group basis. The size of the bit group corresponds to a parallel factor of the LDPC codeword. The second memory provides the interleaved codeword to a modulator for quadrature phase shift keying (QPSK) modulation.

Abstract: A method and an apparatus for transmitting/receiving a signal by using a variable band width in a communication system are disclosed. An operating method of a terminal comprises the steps of: receiving, from a base station, first configuration information about one or more guard bands of an unlicensed band; confirming the one or more guard bands configured in the unlicensed band on the basis of the first configuration information; and confirming a plurality of RB sets configured in the unlicensed band on the basis of the one or more guard bands. Therefore, performance of the communication system can be improved.

Abstract: A low density parity check (LDPC) encoder, an LDPC decoder, and an LDPC encoding method are disclosed. The LDPC encoder includes first memory, second memory, and a processor. The first memory stores an LDPC codeword having a length of 64800 and a code rate of 7/15. The second memory is initialized to 0. The processor generates the LDPC codeword corresponding to information bits by performing accumulation with respect to the second memory using a sequence corresponding to a parity check matrix (PCM).

Abstract: Disclosed are a method and an apparatus for transmitting and receiving a signal including cell information in a communication system. An operation method of a terminal comprises the steps of: receiving a first SS/PBCH block from a base station; receiving a second SS/PBCH block from the base station after receiving the first SS/PBCH block; and confirming information included in the first SS/PBCH block and the second SS/PBCH block by performing a combining operation on the first SS/PBCH block and the second SS/PBCH block when a transmission beam of the first SS/PBCH block is the same as a transmission beam of the second SS/PBCH block. Therefore, the performance of a communication system can be improved.