Abstract: Disclosed are a relay method and device in a communication system. An operation method of a first communication node comprises the steps of: transmitting a reference signal to one or more candidate R nodes; receiving first feedback information including a minimum value of a first RSRP from a first candidate R node belonging to the one or more candidate R nodes; receiving second feedback information including a minimum value of a second RSRP from a second candidate R node belonging to the one or more candidate R nodes; comparing a first value based on the first feedback information with a second value based on the second feedback information; when the first value is greater than the second value, selecting the first candidate R node as an R node that is to perform a relaying operation; and communicating with a second communication node via the R node.

Abstract: A method of a transmitting terminal may include: setting an initial beam pairing flag indicating that the transmitting terminal transmitting sidelink-synchronization signal blocks (S-SSBs) is not a synchronization reference terminal; transmitting a plurality of S-SSBs including the initial beam pairing flag in a beam sweeping scheme; receiving, from a receiving terminal, information on a preferred beam among a plurality of beams through which the plurality of S-SSBs are transmitted; and transmitting data to the receiving terminal using the preferred beam.

Abstract: An operation method of a first terminal may include: transmitting a plurality of sidelink-synchronization signal blocks (S-SSBs); performing a monitoring operation on a plurality of response resources associated with the plurality of S-SSBs; receiving a first response signal from a second terminal in a first response resource among the plurality of response resources; identifying a first S-SSB associated with the first response resource among the plurality of S-SSBs; and determining a first transmission beam through which the first S-SSB is transmitted among a plurality of transmission beams of the first terminal as an optimal transmission beam.

Abstract: Disclosed are a method and an apparatus for sidelink resource allocation in a wireless communication system. The method and apparatus for sidelink resource allocation in a wireless communication system, a method of a first terminal, may include: receiving, from a base station, resource pool configuration information including information on a resource sensing type; in response to that the information on the resource sensing type indicates a sensing operation, sensing transmission resource(s) within a sensing period according to the resource sensing type based on the scheduling information; selecting a first resource based on a result of the sensing on the transmission resource(s); and performing sidelink communication using the selected first resource.

Abstract: An operation method of a relay node may include: receiving, from a first communication node, first data composed of n bits; receiving, from a second communication node, second data composed of m bits; in response to determining that n is greater than m, generating first T-data of m bits excluding (n?m) bits from the n-bits of the first data and first R-data of (n?m) bits; generating third data by performing a network coding operation on the first T-data and the second data; transmitting the third data to the first communication node; and transmitting the third data and the first R-data to the second communication node.

Abstract: An operation method of an IAB node in a communication system may comprise: measuring a power difference between a first signal received from a first node and a second signal received from a second node; controlling a transmit power of each of the first node and the second node based on the power difference; generating scheduling information for allowing the first node and the second node to simultaneously transmit signals; transmitting the scheduling information to the first node and the second node; and receiving signals that the first node and the second node simultaneously transmit according to the scheduling information by using the transmit power.

Abstract: An operation method of a first terminal, performed in a communication system, may comprise receiving sidelink resource allocation information from a base station; receiving a first sidelink signal from a second terminal based on the sidelink resource allocation information; calculating a path loss experienced by the first sidelink signal based on the first sidelink signal; transmitting a second sidelink signal including information on the path loss experienced by the first sidelink signal to the second terminal; and receiving, from the second terminal, a third sidelink signal to which a sidelink transmit power determined based on the path loss is allocated.

Abstract: An operation method of a first terminal, performed in a communication system, may comprise receiving sidelink resource allocation information from a base station; receiving a first sidelink signal from a second terminal based on the sidelink resource allocation information; calculating a path loss experienced by the first sidelink signal based on the first sidelink signal; transmitting a second sidelink signal including information on the path loss experienced by the first sidelink signal to the second terminal; and receiving, from the second terminal, a third sidelink signal to which a sidelink transmit power determined based on the path loss is allocated.

Abstract: A method and an apparatus for allocating a transmission time for a bi-directional relay are proposed. In a bi-directional relay system in which bi-directional communication is performed between a first node and a second node, basic parameters for transmission time allocation are acquired, where the basic parameters include a first transmission power of a signal transmitted from the first node and a second transmission power of a signal transmitted from the second node. A plurality of intersecting times at which sums of transmission rates for nodes become equal are calculated by using the basic parameters, and a transmission time is allocated based on the plurality of the intersecting times, the first transmission power, and the second transmission power.

Abstract: A method and an apparatus for receiving a signal in a high-speed mobile network are provided. In the case of receiving, by a moving terminal in a high-speed mobile network environment, signals transmitted from a plurality of base stations, a signal received through one antenna is decoded to generate a first symbol corresponding to a first signal transmitted from a first base station. The first symbol is subtracted from the received signal to acquire a modified received signal, and the modified received signal is decoded to generate a second symbol corresponding to a second signal transmitted from a second base station.

Abstract: An apparatus for allocating a broadcasting channel in each cell determines a position to which the broadcasting channel is to be allocated using a number of cell IDs and a cell ID of each cell which is allocated different from neighboring cells in a subframe of a downlink frame, and allocates the broadcasting channel to the determined position.

Abstract: A method for transmitting machine type communication (MTC) data and an apparatus therefor are disclosed. A method for transmitting data in a MTC device located in a mobile communication system may comprise estimating an absolute position of the MTC device, receiving an awake message, extracting downlink synchronization information and absolute positional information of a base station included in the awake message, estimating a transmission delay time between the MTC device and the base station, and transmitting signal to the base station based on the transmission delay time and the downlink synchronization information. Therefore, a problem of uplink interferences between terminals and a base station due to a MTC device, which can be generated in supporting MTC services for a conventional cellular communication system, may be resolved.

Abstract: Provided is a rate matching apparatus. The rate matching apparatus includes interleavers, dummy bit removers, a bit collector, a memory and a selector. The interleavers interleave code blocks, respectively. The dummy bit removers remove dummy bits of the interleaved code blocks, respectively. The bit collector collects code blocks with the dummy bits removed by bit units, and divides a collected data bit stream into systematic data and parity data. The memory stores the systematic data and the parity data in parallel. The selector outputs in parallel a plurality of data bits which are selected from the systematic data and parity data of the memory.

Abstract: Provided is a rate matching apparatus. The rate matching apparatus includes interleavers, dummy bit removers, a bit collector, a memory and a selector. The interleavers interleave code blocks, respectively. The dummy bit removers remove dummy bits of the interleaved code blocks, respectively. The bit collector collects code blocks with the dummy bits removed by bit units, and divides a collected data bit stream into systematic data and parity data. The memory stores the systematic data and the parity data in parallel. The selector outputs in parallel a plurality of data bits which are selected from the systematic data and parity data of the memory.

Abstract: Provided are a divider having a small area and an improved operation speed and a method of operating the same. The divider includes a memory, a controller, and a multiplier. The memory is configured to store table values included in a predetermined range. The controller is configured to receive a divisor, generate an address expressed in a plurality of bits according to the bits except the most significant bit of the divisor, and receive the table value corresponding to the address from the memory. The multiplier is configured to receive a dividend and calculate an initial value by multiplying the dividend and the table value corresponding to the address. Herein, the controller determines an exponent of the divisor and right-shifts the initial value by the exponent of the divisor.

Abstract: Provided are a method and apparatus for derate matching a rate-matched data. The received data is deinterleaved and derate matched at a time, without using input buffers or constructing input buffers in parallel. Thus, a total process time necessary for the deinterleaving process and the derate matching process is reduced, and the use of memories such as the input buffers is minimized.

Abstract: Provided is a decoding apparatus and method using orthogonal space-time block codes (OSTBCs) robust against timing errors. The decoding apparatus may include: a cyclic prefix removal unit to receive a signal, and to remove a cyclic prefix in the signal; an inverse discrete Fourier transform (IDFT) unit to apply an IDFT to the signal with the removed cyclic prefix; a guard band removal unit to remove a guard band in the inverse discrete Fourier transformed signal, and to generate a complex matrix; a channel estimation unit to transmit a carrier corresponding to the complex matrix and channel status information associated with transmit and receive antennas; and a decoder to calculate a channel status vector with respect to a complex symbol included in the complex matrix, using the channel status information, and to calculate an inner product between the channel status vector and the complex matrix, to restore the complex symbol.

Abstract: A de-rate matching device in a communication system divides received data into a plurality of blocks, and simultaneously de-rate-matches data in the respective blocks.

Abstract: Provided are a method and apparatus for derate matching a rate-matched data. The received data is deinterleaved and derate matched at a time, without using input buffers or constructing input buffers in parallel. Thus, a total process time necessary for the deinterleaving process and the derate matching process is reduced, and the use of memories such as the input buffers is minimized.

Abstract: A system connected to a mobile station through a network and allocating a radio source to the mobile station for packet data service, the system including a base station connected to the mobile station through a wireless network, and having a physical layer connected to the mobile station through a wireless network and performing wireless access and a medium access control (MAC) layer performing service-specific resource allocation for the mobile station; and a control station having an upper layer connected to the base station through a wired network and receiving a result of service-specific resource allocation from the MAC layer, and performing as an interface between networks.