Abstract: A beam management method performed by a moving backhaul hub may comprise: calculating, based on location information at a first time, a first separation distance between the moving backhaul hub and a moving backhaul terminal, a first azimuth angle to which a beam of the moving backhaul hub is directed, and a first elevation angle in which the beam of the moving backhaul hub is directed; determining an operation mode of the moving backhaul terminal using the first separation distance, the first azimuth angle, and/or the first elevation angle; determining whether to transmit a beam search command message to the moving backhaul terminal based on the operation mode of the moving backhaul terminal; and transmitting signals to the moving backhaul terminal in consideration of the operation mode when the beam search command message is transmitted to the moving backhaul terminal.

Abstract: A method for setting up a mobile backhaul link, performed by a hub in a mobile backhaul system, may comprise: calculating a separation distance between the hub and a mobile backhaul terminal using GPS position information; selecting a beam width and a beam search scheme of at least one beam to be used for setting up the mobile backhaul link according to the separation distance; transmitting ID(s) of the at least one beam to the mobile backhaul terminal through the at least one beam having the beam width according to the beam search scheme; receiving the ID(s) of the at least one beam and a measurement result of the at least one beam from the mobile backhaul terminal; and selecting a first beam having a largest signal strength according to the measurement result, wherein the first beam is used for setting up the mobile backhaul link.

Abstract: An operation method of a first node belonging to an Xhaul network in a wireless backhaul system including the Xhaul network may comprise transmitting first resource allocation information to a second node and third nodes; receiving, from the second node, information of cross polarization interferences (XPIs) measured for wireless signals through wireless links generated based on the first resource allocation information; generating second resource allocation information indicating resources allocated to each of the second node and the third nodes based on the information of the XPIs; and transmitting the second resource allocation information to the second node and the third nodes, wherein the XPIs for the wireless signals are measured by the third nodes.

Abstract: An operation method of a first node belonging to an Xhaul network in a wireless backhaul system including the Xhaul network may comprise transmitting first resource allocation information to a second node and third nodes; receiving, from the second node, information of cross polarization interferences (XPIs) measured for wireless signals through wireless links generated based on the first resource allocation information; generating second resource allocation information indicating resources allocated to each of the second node and the third nodes based on the information of the XPIs; and transmitting the second resource allocation information to the second node and the third nodes, wherein the XPIs for the wireless signals are measured by the third nodes.

Abstract: Disclosed are a random access method and a random access apparatus in a wireless communication system. An operation method of a terminal in a communication system, according to the present invention, comprises receiving system information including configuration information on a physical random access channel (PRACH) composed of a plurality of access slots from a first base station; selecting one access slot among the plurality of access slots based on the configuration information; and transmitting a random access preamble to the first base station through the one access slot. Therefore, the capacity of the random access channel can be increased without further occupation of radio resources.

Abstract: Disclosed are a random access method and a random access apparatus in a wireless communication system. An operation method of a terminal in a communication system, according to the present invention, comprises receiving system information including configuration information on a physical random access channel (PRACH) composed of a plurality of access slots from a first base station; selecting one access slot among the plurality of access slots based on the configuration information; and transmitting a random access preamble to the first base station through the one access slot. Therefore, the capacity of the random access channel can be increased without further occupation of radio resources.

Abstract: A base station of a wireless communication system determines an index of radio resource blocks to which a plurality of random access channels are allocated, and allocates the plurality of random access channels to locations of the determined index of the radio resource blocks such that the radio resource blocks of the plurality of random access channels have a symmetrical structure in available uplink radio resource blocks.

Abstract: A base station (BS) of a mobile communication system receives a candidate list including a candidate remote radio head (RRH) adjacent to the UE, excluding at least one serving RRH connected to the UE, among a plurality of RRHs, from the UE, allocates a random access code index to at least one candidate RRH included in the candidate list, and subsequently transmits the random access code index allocated to the at least one candidate RRH to the UE.

Abstract: A base station uses a plurality of transmitting/receiving beams to divide a service region into a plurality of sub-regions, transmits a sub-region reference signal for identifying sub-regions and a beam-identifying reference signal for identifying transmitting/receiving beams in sub-regions, uses transmitting beams belonging to sub-regions to transmit a system information block including random access information of sub-regions, uses random access information of the sub-region to which the terminal belongs to receive a random access preamble transmitted by the terminal and determine the transmitting/receiving beam to which the terminal belongs, and transmits a random access response message including resource allocation information of the transmitting/receiving beam to which the terminal belongs to the terminal.

Abstract: Disclosed are a method and an apparatus for transmitting control information and status information. In a distributed base station where a digital unit and a radio unit transmit/receive a signal through an optical transceiver, the digital unit inserts control information for controlling the radio unit into a guard band of a downlink transmission signal to be transmitted through an antenna. The radio unit inserts status information into a guard band of an uplink reception signal received through the antenna and to transmit an uplink reception signal including the status information to the digital unit.

Abstract: A clustering wireless base station includes a group digital processor including a plurality of digital units (DU) and a plurality of remote radio frequency units (RRU) that are connected to the group digital processor through a transport network and that are installed in each service target area. In this case, each DU includes a decoder that decodes upward data that is received from the each DU, and each RRU includes an encoder that encodes downward data from the each DU.

Abstract: Disclosed are a method and an apparatus that efficiently generate a DFT-ed preamble sequence used in uplink PRACH transmission of a wireless communication system. The method for generating a DFT-ed preamble sequence in a wireless communication system includes: calculating a first index value corresponding to the length of a DFT-ed preamble sequence by using control information; extracting a value on a unit circle corresponding to the first index value or a value on the unit circle corresponding to a second index value acquired by transforming the first index value according to a preamble format; reflecting a sign on the unit circle including the corresponding index value to the extracted value on the unit circle; and multiplying a value to which the sign is reflected by an initial sequence value according to a root index.

Abstract: Provided is a method of transmitting and receiving a signal in a wireless communication. The method of transmitting and receiving a signal in a wireless communication includes: transmitting a transmission beam to a terminal in an area which exists within a preset cluster; receiving a random access channel signal including a random access code mapped to the cluster; and detecting the random access code by using the random access channel signal.

Abstract: A base station of a wireless communication system determines an index of radio resource blocks to which a plurality of random access channels are allocated, and allocates the plurality of random access channels to locations of the determined index of the radio resource blocks such that the radio resource blocks of the plurality of random access channels have a symmetrical structure in available uplink radio resource blocks.

Abstract: Disclosed are a method and an apparatus for data transmission that apply a transmission diversity method which does not decrease transmission rate even when the number of transmission antennas is 3 or more for frequency division multiplexing scheme downlink cooperation communication to allow a terminal to have an excellent diversity characteristic.

Abstract: The present invention relates to a signal processing apparatus and method of a basestation. The apparatus according to the present invention includes a plurality of first processing units which allocates transmission data to a predetermined frequency band and transmits a transmission signal in which control information is allocated to a guard band in the predetermined frequency band; a plurality of second processing units which extracts the control information from the guard band in the predetermined frequency band for a reception signal to perform a corresponding operation and extracts the transmission data from the predetermined frequency band to transmit the transmission data through the antenna; and an optical transmitting unit which combines a plurality of transmission signals received from the plurality of first processing units into one signal to transmit the signal to the plurality of second processing units through the optical cable.

Abstract: Provided is a method for transmitting and receiving multi-input multi-output in a wireless backhaul network, including: selecting at least one pair of dual-polarized transmitting antennas to be activated among pairs of dual-polarized transmitting antennas of a transmitter; transmitting a signal through the selected pairs of dual-polarized transmitting antennas; and receiving, by pairs of dual-polarized receiving antennas of a receiver, the signal transmitted from the transmitter.

Abstract: There are provided a method of generating a ranging signal of a wireless terminal and a device for generating a ranging signal of a wireless communication system that can generate the ranging signal using one IFFT engine independently from a mode of the ranging signal transmitted in uplink in a wireless communication system in which a frequency interval of subcarriers used to generate an initial ranging signal and a frequency interval of subcarriers using periodic ranging are different. In this way, it is possible to decrease complexity of hardware and design of the wireless terminal, and decrease power consumption of the wireless terminal through hardware simplification.

Abstract: Disclosed is an apparatus for transmitting multiple streams, including: a polarized wave control unit generating non-orthogonal polarization information for three or more input streams; a polarized wave generating unit polarizing three or more input streams in a baseband based on the non-orthogonal polarization information to generate vertical and horizontal polarization components; and a polarized wave transmitting unit transmitting the plurality of vertical and horizontal polarization components through dual polarization antennas.

Abstract: Provided is a method for transmitting and receiving multi-input multi-output in a wireless backhaul network, including: selecting at least one pair of dual-polarized transmitting antennas to be activated among pairs of dual-polarized transmitting antennas of a transmitter; transmitting a signal through the selected pairs of dual-polarized transmitting antennas; and receiving, by pairs of dual-polarized receiving antennas of a receiver, the signal transmitted from the transmitter.