Abstract:
There are provided a method and apparatus for decoding an LDPC code. In this specification, a first result is calculated by performing the calculation of a check node having two inputs forward and recursively, a second result is calculated by performing the calculation of the check node having the two inputs backward and recursively, and the check node is calculated using the first result and the second result as the inputs.
Abstract:
A method of transmitting a high definition (HD) image and an ultra high definition (UHD) image, the method including obtaining a first HD image by down-scaling an original UHD image, obtaining at least one of a second HD image and a half-resolution UHD image by down-scaling the original UHD image, encoding the first HD image, encoding at least one of the second HD image and the half-resolution UHD image, generating a first transmission stream by multiplexing and synchronizing the encoded first HD image, generating a second transmission stream by multiplexing and synchronizing at least one of the encoded second HD image and the encoded half-resolution UHD image, transmitting the first transmission stream via a first transmission channel, and transmitting the second transmission stream via a second transmission channel differing from the first transmission channel is provided.
Abstract:
Disclosed are a method and an apparatus for transmitting or receiving feedback information in a communication system. An operation method of a terminal comprises the steps of: receiving, from a base station, DCI #1 including scheduling information of PDSCH #1 and transmission resource information of HARQ response #1 with respect to PDSCH #1; receiving, from the base station, DCI #2 including scheduling information of PDSCH #2 and transmission resource information of HARQ response #2 with respect to PDSCH #2; and when the transmission resource information of HARQ response #1 is configured as undefined, transmitting, to the base station, HARQ response #1 and HARQ response #2 by using a resource indicated by the transmission resource information of HARQ response #2. Therefore, the performance of the communication system can be improved.
Abstract:
Disclosed are an apparatus and method for providing an offloading service. A method of providing an offloading service according to an example embodiment includes streaming, to a user terminal including a cellular network receiver and a broadcast network receiver, media content data through a cellular network, transmitting, to the user terminal, an offloading service providing signal for activating the broadcast network receiver of the user terminal through the cellular network, transmitting, to the user terminal, a broadcast signal including connection information of a broadcast network to which the user terminal is to be connected so as to receive the media content data, through the cellular network, and broadcasting the media content data through the broadcast network.
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:
Disclosed are a method and an apparatus for transmitting or receiving feedback information in a communication system. An operation method of a terminal comprises the steps of: receiving, from a base station, DCI #1 including scheduling information of PDSCH #1 and transmission resource information of HARQ response #1 with respect to PDSCH #1; receiving, from the base station, DCI #2 including scheduling information of PDSCH #2 and transmission resource information of HARQ response #2 with respect to PDSCH #2; and when the transmission resource information of HARQ response #1 is configured as undefined, transmitting, to the base station, HARQ response #1 and HARQ response #2 by using a resource indicated by the transmission resource information of HARQ response #2. Therefore, the performance of the communication system can be improved.
Abstract:
A method for transmitting and receiving a synchronization signal in a communication system is disclosed. An operation method of a terminal comprises the steps of: receiving, from a base station, a synchronization signal and an SS block including a PBCH; estimating y bits among x bits for indicating a number of a system frame on which the SS block has been transmitted, on the basis of a sequence used for the scrambling of the PBCH included in the SS block; decoding the PBCH included in the SS block so as to acquire z bits among the x bits for indicating the number of the system frame on which the SS block has been transmitted; and confirming the number of the system frame on the basis of the y bits and the z bits. Therefore, the performance of a communication system can be improved.
Abstract:
Disclosed is a method of transmitting, by a transmission device, broadcast signals in a frequency-shared terrestrial broadcast system. The method includes generating the broadcast signals including pilot signals arranged at a physical layer frame based on a group identification (ID) defined according to a broadcast service, and transmitting the generated broadcast signals to a reception device, wherein the positions of the pilot signals arranged at the physical layer frame are different by group IDs.
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:
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.