WO2017135593A1 - Procédé pour qu'un système de communication mobile à ultra haute fréquence émette-reçoive un signal de référence et une rétroaction et appareil associé - Google Patents

Procédé pour qu'un système de communication mobile à ultra haute fréquence émette-reçoive un signal de référence et une rétroaction et appareil associé Download PDF

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Publication number
WO2017135593A1
WO2017135593A1 PCT/KR2017/000507 KR2017000507W WO2017135593A1 WO 2017135593 A1 WO2017135593 A1 WO 2017135593A1 KR 2017000507 W KR2017000507 W KR 2017000507W WO 2017135593 A1 WO2017135593 A1 WO 2017135593A1
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Prior art keywords
reference signal
base station
information
terminal
subframe
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PCT/KR2017/000507
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English (en)
Korean (ko)
Inventor
이효진
김성현
김영석
Original Assignee
주식회사 케이티
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Priority claimed from KR1020160087298A external-priority patent/KR20170093675A/ko
Priority claimed from KR1020160087324A external-priority patent/KR102379542B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to US16/075,591 priority Critical patent/US10720973B2/en
Publication of WO2017135593A1 publication Critical patent/WO2017135593A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • Embodiments of the present invention relate to a method and apparatus for transmitting and receiving reference signals and feedback information between a terminal and a base station in a high frequency mobile communication system.
  • the mobile communication system is evolving into a high speed, high quality wireless packet data communication system for providing data service and multimedia service, instead of providing an initial voice-oriented service.
  • High Speed Downlink Packet Access HSDPA
  • High Speed Uplink Packet Access HSUPA
  • LTE-Advanced Long Term Evolution Advanced
  • LTE-Advanced Long Term Evolution Advanced
  • LTE / LTE-Advanced system utilizes the advantages of each technology by applying MIMO (Multiple Input Multiple Output) and Orthogonal Frequency Division Multiple Access (OFDMA) technologies.
  • MIMO Multiple Input Multiple Output
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDMA provides an advantage of increasing capacity by allowing scheduling of different terminals on one frequency axis.
  • the capacity can be combined with an appropriate scheduling method.
  • the present embodiment in a terminal receiving a signal in a high-frequency mobile communication system, the synchronization signal and beam reference to which beamforming is applied at the same symbol timing through a resource block consisting of subcarriers set to a multiple of 15 kHz from a base station
  • a method comprising: receiving a signal, identifying beamforming applied to the synchronization signal from the beam reference signal, and obtaining cell identifier information and time-frequency synchronization information from the synchronization signal.
  • the beam reference signal may be mapped at a predetermined interval from a resource block having a low index among resource blocks except for a resource block to which a synchronization signal is mapped.
  • the beam reference signal may be mapped at regular intervals in both directions about the resource block to which the synchronization signal is mapped.
  • the beam reference signal may be mapped to subcarriers included in resource blocks other than the resource block to which the synchronization signal is mapped, mapped to 8 contiguous subcarriers in 12 subcarriers, and Null may be mapped to the remaining 4 subcarriers. .
  • a beam reference signal mapped to the same antenna port may be repeatedly mapped to at least one subcarrier among the subcarriers to which the beam reference signal is mapped.
  • embodiments of the present invention provide a method of transmitting a signal by a base station in an ultra-high frequency mobile communication system, comprising: mapping a synchronization signal to which a beamforming is applied to a resource block composed of subcarriers set to a multiple of 15 kHz, and a synchronization signal; And mapping a beam reference signal for confirming beamforming applied to the synchronization signal to the mapped symbol timing, and transmitting the synchronization signal and the beam reference signal to the terminal.
  • embodiments of the present invention provide a synchronization signal and beam reference to which beamforming is transmitted at the same symbol timing through a resource block composed of subcarriers set to a multiple of 15 kHz from a base station in a terminal receiving a signal in a microwave communication system.
  • a terminal including a communication unit for receiving a signal and a control unit for checking beamforming applied to a synchronization signal from a beam reference signal and obtaining cell identifier information and time-frequency synchronization information from the synchronization signal.
  • the present invention in the base station for transmitting a signal in a high-frequency mobile communication system, to map a synchronization signal to which beamforming is applied to a resource block consisting of subcarriers set in multiples of 15 kHz and synchronized to the symbol timing to which the synchronization signal is mapped.
  • a base station including a control unit for mapping a beam reference signal for confirming beamforming applied to a signal, and a communication unit transmitting a synchronization signal and a beam reference signal to a terminal.
  • the embodiments of the present invention in a method for transmitting feedback information by a terminal in a high frequency mobile communication system, the terminal receiving a beam reference signal from a base station, and a reference signal in a subframe receiving the beam reference signal Identifying a preferred symbol based on received power or reference signal reception quality; and transmitting radio resource management information or channel state information on the antenna port or antenna array to the base station for the preferred symbol. to provide.
  • the terminal receives the beam reference signal in eight consecutive subcarriers in units of 12 subcarriers in the symbol in which the beam reference signal is transmitted, and receives another signal in the remaining four subcarriers. can do.
  • the beam reference signal port included in the preferred symbol for the preferred antenna port or antenna array based on the reference signal reception power or reference signal reception quality
  • Resource management information or channel state information may be transmitted to the base station.
  • radio resource management information or channel state information for all antenna ports or all antenna arrays may be transmitted for a preferred symbol.
  • radio resource management information or channel state information for B antenna arrays or 2B antenna ports may be transmitted for a preferred symbol, where B may be the number of identified beam reference signal antenna ports divided by 2 have.
  • radio resource management information or channel state information for one specific antenna array or one specific antenna port may be transmitted with respect to a preferred symbol.
  • the UE may transmit radio resource management information or channel state information in a K-th subframe after receiving the beam reference signal, where K is a subframe in which the UE receives data and feedback information on the data. It may be the same value as the difference of the subframe transmitting the.
  • the method of transmitting feedback information of the terminal may further include receiving a beam steering reference signal from the base station, and transmitting feedback information on the received beam steering reference signal to the base station.
  • the beam steering reference signal may be scheduled in the Nth subframe and received in the N + Rth subframe, and feedback information may be transmitted in the N + R + K'th subframe.
  • R may be a fixed value or a value determined according to the index of the scheduled subframe.
  • the embodiments of the present invention provide a method for receiving feedback information from a base station in a microwave communication system, the method comprising: transmitting a beam reference signal to a terminal, and receiving a reference signal receiving power or a subframe in which a beam reference signal is transmitted; A method comprising receiving radio resource management information or channel state information about an antenna port or an antenna array for a preferred symbol based on a reference signal reception quality.
  • the present embodiment in the terminal for transmitting feedback information in the ultra-high frequency mobile communication system, the communication unit for receiving the beam reference signal transmitted by the base station, and the reference signal reception power in the subframe receiving the beam reference signal or And a control unit for generating feedback information including radio resource management information or channel state information about an antenna port or an antenna array with respect to a preferred symbol based on a reference signal reception quality, and transmitting the generated feedback information to a base station through a communication unit. It provides a terminal.
  • embodiments of the present invention provide a base station for receiving feedback information in a high frequency mobile communication system, and transmits a beam reference signal to a terminal and adjusts reference signal reception power or reference signal reception quality in a subframe in which the beam reference signal is transmitted.
  • a communication unit that receives radio resource management information or channel state information on an antenna port or antenna array for a preferred symbol as a reference, and maps data to be transmitted to a terminal to the specific resource using the received radio resource management information or channel state information. It provides a base station including a control unit.
  • the embodiments of the present invention by measuring the beam reference signal or the beam adjustment reference signal in the ultra-high frequency mobile communication system to ensure the time to transmit feedback by adjusting the beam applied to the signal transmitted to the terminal according to the measurement result and transmit and receive signals To help.
  • FIG. 1 illustrates time and frequency resources in an LTE / LTE-Advanced system.
  • FIG. 2 is a diagram illustrating time-frequency parameters used in LTE.
  • FIG. 3 is a diagram illustrating the location of a PSS / SSS used in an LTE system operating with TDD.
  • FIG. 4 is a diagram illustrating radio resources of one subframe and one resource block which are the minimum units that can be scheduled in downlink in the LTE / LTE-Advanced system.
  • FIG. 5 is a diagram illustrating a method of using respective regions and signals in radio resources of one subframe and one resource block, which are the minimum units that can be scheduled in downlink in an LTE / LTE-Advanced system.
  • FIG. 6 is a diagram for explaining an operation of confirming scheduling information using a PDCCH region.
  • FIG. 8 is a diagram illustrating an antenna structure used to transmit a signal by forming a beam in a microwave communication system.
  • FIG. 9 is a diagram illustrating mapping between antenna ports and antenna elements in the case of having one, two, or four antenna arrays for each base station.
  • FIG. 10 is a diagram illustrating a case where a timing and beam acquisition subframe is transmitted with a period of 5 ms.
  • FIG. 11 is a diagram illustrating in detail a function and a related structure of signals transmitted in a timing and beam acquisition subframe.
  • FIG. 12 is a diagram illustrating possible methods of determining a location of a resource block in which a beam reference signal illustrated in FIG. 11 is transmitted.
  • FIG. 13 is a diagram illustrating a mapping relationship between a beam corresponding to each antenna port and a subcarrier in a resource block in a resource block through which a beam reference signal is transmitted.
  • FIG. 14 is a diagram illustrating possible mapping relations between beams for each port and subcarriers capable of beam reference signals with respect to the total number of antenna ports of a specific base station.
  • 15 shows methods for confirming the number of antenna ports used by a terminal in a base station.
  • FIG. 16 illustrates operations of a terminal receiving and performing signals existing in a timing and beam acquisition subframe in an initial microwave cell connection situation.
  • FIG. 17 and 18 illustrate methods for a terminal receiving a channel from a beam reference signal to calculate and report radio resource management information such as reference signal reception power (RSRP) or reference signal reception quality (RSRQ) information.
  • radio resource management information such as reference signal reception power (RSRP) or reference signal reception quality (RSRQ) information.
  • FIG. 19 illustrates methods for calculating and reporting channel state information such as RI / PMI / CQI by a terminal receiving a channel from a beam reference signal.
  • 20 is a diagram illustrating a base station scheduling and transmitting a beam steering reference signal.
  • 21A and 21B are diagrams illustrating a structure of time-frequency resources to which a beam steering reference signal is transmitted.
  • FIG. 22 is a diagram illustrating a configuration of a terminal in an ultrahigh frequency mobile communication system according to the present embodiments.
  • FIG. 23 is a diagram illustrating a configuration of a base station in an ultrahigh frequency mobile communication system according to the present embodiments.
  • 24 is a diagram illustrating a signal transmission and reception method of a terminal according to the present embodiments.
  • 25 is a diagram illustrating a signal transmission and reception method of a base station according to the present embodiments.
  • 26 is a diagram illustrating a method for transmitting feedback information by a terminal according to the present embodiments.
  • FIG. 27 is a diagram illustrating a method of receiving feedback information by a base station according to the present embodiments.
  • first, second, A, B, (a), and (b) may be used. These terms are only to distinguish the components from other components, and the terms are not limited in nature, order, order or number of the components.
  • the MTC terminal may mean a terminal supporting low cost (or low complexity) or a terminal supporting coverage enhancement.
  • the MTC terminal may mean a terminal defined in a specific category for supporting low cost (or low complexity) and / or coverage enhancement.
  • the MTC terminal may mean a newly defined 3GPP Release-13 low cost (or low complexity) UE category / type for performing LTE-based MTC related operations.
  • the MTC terminal supports enhanced coverage compared to the existing LTE coverage, or supports UE category / type defined in the existing 3GPP Release-12 or lower, or newly defined Release-13 low cost (or lower power consumption).
  • low complexity can mean UE category / type.
  • the wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data, and the like.
  • the wireless communication system includes a user equipment (UE) and a base station (base station, BS, or eNB).
  • a user terminal is a generic concept meaning a terminal in wireless communication.
  • user equipment (UE) in WCDMA, LTE, and HSPA, as well as mobile station (MS) in GSM, user terminal (UT), and SS It should be interpreted as a concept that includes a subscriber station, a wireless device, and the like.
  • a base station or a cell generally refers to a station that communicates with a user terminal, and includes a Node-B, an evolved Node-B, an Sector, a Site, and a BTS.
  • Other terms such as a base transceiver system, an access point, a relay node, a remote radio head (RRH), a radio unit (RU), and a small cell may be called.
  • RRH remote radio head
  • RU radio unit
  • a base station or a cell is a generic meaning indicating some areas or functions covered by a base station controller (BSC) in CDMA, a Node-B in WCDMA, an eNB or a sector (site) in LTE, and the like. It should be interpreted as, and it is meant to cover all the various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, RRH, RU, small cell communication range.
  • BSC base station controller
  • the base station may be interpreted in two senses. i) the device providing the megacell, the macrocell, the microcell, the picocell, the femtocell, the small cell in relation to the wireless area, or ii) the wireless area itself. In i) all devices which provide a given wireless area are controlled by the same entity or interact with each other to cooperatively configure the wireless area to direct the base station.
  • the base station may indicate the radio area itself to receive or transmit a signal from the viewpoint of the user terminal or the position of a neighboring base station.
  • megacells macrocells, microcells, picocells, femtocells, small cells, RRHs, antennas, RUs, low power nodes (LPNs), points, eNBs, transmission / reception points, transmission points, and reception points are collectively referred to as base stations. do.
  • LPNs low power nodes
  • the user terminal and the base station are two transmitting and receiving entities used to implement the technology or technical idea described in this specification in a comprehensive sense and are not limited by the terms or words specifically referred to.
  • the user terminal and the base station are two types of uplink or downlink transmitting / receiving subjects used to implement the technology or the technical idea described in the present invention, and are used in a generic sense and are not limited by the terms or words specifically referred to.
  • the uplink (Uplink, UL, or uplink) refers to a method for transmitting and receiving data to the base station by the user terminal
  • the downlink (Downlink, DL, or downlink) means to transmit and receive data to the user terminal by the base station It means the way.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDM-FDMA OFDM-TDMA
  • UMB Universal Mobile Broadband
  • the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.
  • TDD time division duplex
  • FDD frequency division duplex
  • a standard is configured by configuring uplink and downlink based on one carrier or a pair of carriers.
  • the uplink and the downlink include a Physical Downlink Control CHannel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), a Physical Uplink Control CHannel (PUCCH), an Enhanced Physical Downlink Control CHannel (EPDCCH), and the like.
  • Control information is transmitted through the same control channel, and data is configured by a data channel such as a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH).
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • control information may also be transmitted using an enhanced PDCCH (EPDCCH or extended PDCCH).
  • EPDCCH enhanced PDCCH
  • extended PDCCH extended PDCCH
  • a cell means a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.
  • a wireless communication system to which embodiments are applied may be a coordinated multi-point transmission / reception system (CoMP system) or a coordinated multi-antenna transmission scheme in which two or more transmission / reception points cooperate to transmit a signal.
  • antenna transmission system a cooperative multi-cell communication system.
  • the CoMP system may include at least two multiple transmission / reception points and terminals.
  • the multiple transmit / receive point is at least one having a base station or a macro cell (hereinafter referred to as an eNB) and a high transmission power or a low transmission power in a macro cell region, which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • an eNB a base station or a macro cell
  • a high transmission power or a low transmission power in a macro cell region which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • downlink refers to a communication or communication path from a multiple transmission / reception point to a terminal
  • uplink refers to a communication or communication path from a terminal to multiple transmission / reception points.
  • a transmitter may be part of multiple transmission / reception points, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.
  • a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH may be described in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH.
  • a description of transmitting or receiving a PDCCH or transmitting or receiving a signal through the PDCCH may be used as a meaning including transmitting or receiving an EPDCCH or transmitting or receiving a signal through the EPDCCH.
  • the physical downlink control channel described below may mean PDCCH or EPDCCH, and may also be used to include both PDCCH and EPDCCH.
  • the EPDCCH which is an embodiment of the present invention, may be applied to the portion described as the PDCCH, and the PDCCH may be applied to the portion described as the EPDCCH as an embodiment of the present invention.
  • high layer signaling described below includes RRC signaling for transmitting RRC information including an RRC parameter.
  • the eNB performs downlink transmission to the terminals.
  • the eNB includes downlink control information and an uplink data channel (eg, a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and scheduling required to receive the PDSCH.
  • a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) may be transmitted.
  • PUSCH physical uplink shared channel
  • the mobile communication system has evolved into a high-speed, high-quality wireless packet data communication system for providing data service and multimedia service from the initial voice-oriented service.
  • various mobile communication standards such as 3GPP's High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE), and LTE-Advanced (Long Term Evolution Advanced) are high-speed, high-quality wireless packets. It was developed to support data transfer services.
  • HSDPA High Speed Downlink Packet Access
  • HSUPA High Speed Uplink Packet Access
  • LTE Long Term Evolution
  • LTE-Advanced Long Term Evolution Advanced
  • LTE-Advanced system is an advanced wireless system of LTE system and has improved data transmission capability compared to LTE.
  • LTE generally refers to base stations and terminal equipment corresponding to Release 8 or Release 9 of 3GPP standards organizations
  • LTE-Advanced refers to base stations and terminal equipment corresponding to Release 10 of 3GPP standards organizations.
  • the 3GPP standards group is proceeding with the standard for the next release with improved performance based on this even after the standardization of LTE-Advanced system.
  • LTE / LTE-Advanced system utilizes the advantages of each technology by applying multiple input multiple output (MIMO) and orthogonal frequency division multiple access (OFDMA) technologies.
  • MIMO multiple input multiple output
  • OFDMA orthogonal frequency division multiple access
  • MIMO for transmitting a radio signal using a plurality of transmission antennas is a MU-MIMO (transmitting data to a plurality of terminals using the same time / frequency resources as a single user MIMO (SU-MIMO) for transmitting to one terminal).
  • SU-MIMO single user MIMO
  • Multi-User MIMO Multi-User MIMO
  • a plurality of transmission antennas transmit radio signals to a plurality of spatial layers for one receiver.
  • the receiver must have a plurality of receive antennas to support the plurality of spatial layers.
  • MU-MIMO a plurality of transmitting antennas transmit radio signals to a plurality of spatial layers for a plurality of receivers.
  • MU-MIMO has the advantage that the receiver does not require multiple reception antennas compared to SU-MIMO.
  • a disadvantage is that since the radio signals are transmitted to a plurality of receivers in the same frequency and time resources, mutual interference may occur between radio signals for different receivers.
  • One of the main factors for obtaining capacity increase through the OFDMA method is that scheduling of different terminals may be performed on the frequency axis. In other words, if the channel is changed over time, such as the channel changes over time, a large capacity gain can be obtained in combination with an appropriate scheduling method.
  • FIG. 1 illustrates time and frequency resources in an LTE / LTE-Advanced system.
  • a radio resource transmitted from an evolved NodeB (eNB) to a user equipment (UE) is divided into Resource Blocks (RBs) 110 on a frequency axis and a subframe on a time axis.
  • RBs Resource Blocks
  • Subframe 120 is divided into units.
  • the resource block 110 is generally composed of 12 subcarriers, and the subcarrier spacing is 15 kHz, and one resource block 110 occupies a band of 180 kHz.
  • the subframe 120 generally consists of 14 OFDM symbol intervals in an LTE / LTE-Advanced system and occupies a time interval of 1 msec.
  • each OFDM symbol interval includes a cyclic prefix (CP).
  • the first and eighth OFDM symbols include 160 Ts of CP and the remaining OFDM symbols include 144 Ts of CP.
  • Ts corresponds to 1 / (15000x2048) seconds as a basic time unit of the LTE / LTE-Advanced system.
  • the LTE / LTE-Advanced system may allocate resources in units of subframes 120 on the time axis and resources in units of resource blocks 110 on the frequency axis.
  • the base station transmits a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) at a predetermined time-frequency position, and the terminal receives the corresponding signal to synchronize Acquire.
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • FIG 3 shows the location of the PSS / SSS used in the LTE system operating with TDD.
  • the PSS is located in the third OFDM symbol of subframe # 1 and subframe # 6, and the SSS is located in the last OFDM symbol of slot # 1 and slot # 11.
  • FIG. 4 illustrates radio resources of one subframe and one resource block, which are the minimum units that can be scheduled in downlink in the LTE / LTE-Advanced system.
  • the downlink scheduling unit of the LTE / LTE-Advanced system includes one subframe 210 on the time axis and one resource block 220 on the frequency axis.
  • Such radio resources consist of 12 subcarriers in the frequency domain and 14 OFDM symbols in the time domain to have a total of 168 unique frequencies and time positions.
  • each of the natural frequency and the time position of FIG. 2 is referred to as a resource element (RE).
  • one subframe consists of two slots each consisting of seven OFDM symbols.
  • a plurality of different types of signals may be transmitted to the radio resource illustrated in FIG. 4 as follows.
  • CRS 230 a reference signal transmitted for channel measurement of all terminals belonging to a specific cell
  • DMRS Demodulation Reference Signal
  • Channel Status Information Reference Signal (CSI-RS) 270 A reference signal transmitted to a UE belonging to a specific signal transmission point and used to measure a channel status.
  • a plurality of transmission points can be included in one cell, so that a plurality of CSI-RSs can be transmitted in one cell.
  • Physical Downlink Shared Channel (PDSCH) 250 A data channel transmitted in downlink, used by a base station to transmit data to a terminal, by using resource units for which a reference signal is not transmitted in the data region of FIG. Sent
  • Control channel (PDCCH, PCFICH, PHICH) 260 UE transmits control information necessary for receiving PDSCH or ACK / NACK for uplink HARQ operation.
  • the control channel may occupy one to three OFDM symbols in each subframe, and the number of OFDM symbols for the corresponding control channel is notified to the terminal through the PCFICH.
  • muting may be set so that the CSI-RS 270 transmitted from another base station can be received without interference from terminals of the corresponding cell.
  • the muting may be applied at a position where the CSI-RS 270 may be transmitted.
  • the terminal receives a data signal by skipping a corresponding radio resource.
  • muting is another term for zero-power CSI-RS. Muting is applied to the position of the CSI-RS 270 because no signal is transmitted with zero transmission power.
  • the CSI-RS 270 may be transmitted using a part of positions indicated as A, B, C, D, E, F, G, H, I, J according to the number of antennas transmitting the CSI-RS 270. have. Also muting can be applied to use some of the positions marked A, B, C, D, E, F, G, H, I, J.
  • the number of antenna ports supported by the LTE-Advanced system is two, four, eight, and the CSI-RS may be transmitted using two, four, and eight resource units, respectively. If the number of antenna ports is two, the CSI-RS 270 is transmitted in half of the specific pattern in FIG. 4, if the number of antenna ports is four, the CSI-RS is transmitted in the entirety of the specific pattern, and if the number of antenna ports is eight, The CSI-RS is transmitted using a continuous pattern. Muting, on the other hand, consists of one pattern unit.
  • the LTE / LTE-Advanced system utilizes a MIMO technology for transmitting data using a plurality of transmit / receive antennas to increase data rate and system capacity.
  • LTE-Advanced system supports up to 8 antenna ports per terminal and supports transmission of up to 8 spatial layers at a time.
  • a UE connected to the specific base station measures a downlink channel using the CSI-RS. Report channel information on this to the base station.
  • the LTE / LTE-Advanced system uses the following three Channel Status Information (CSI):
  • RI Rank Indicator
  • PMI Precoding Matrix Indicator
  • CQI Channel Quality Indicator
  • MCS Maximum Modulation and Coding Scheme
  • FIG. 5 illustrates a method of using respective regions and signals in radio resources of one subframe and one resource block, which is a minimum unit that can be scheduled in downlink in an LTE / LTE-Advanced system.
  • the UE checks a physical downlink control channel (PDCCH) every subframe to determine whether data (PDSCH) is transmitted in the corresponding subframe.
  • PDCCH physical downlink control channel
  • the PDCCH may occupy one to three OFDM symbol regions in each subframe, and the UEs may receive a Physical Control Format Indicator Channel (PCFICH) to determine how many OFDM symbols are used as the PDCCH.
  • PCFICH Physical Control Format Indicator Channel
  • the base station sets the PCFICH to one of 1, 2, or 3 according to the size of the control channel required in a specific subframe and transmits it to the terminals in the cell, and transmits the PDCCH in an area corresponding to the set value.
  • the PDCCH is transmitted over the entire system band, and scheduling information to a specific terminal is spread evenly throughout the entire system band.
  • the scheduling information included in the PDCCH includes some or all of the following information about terminals to receive data in a corresponding subframe:
  • the UE checks a PDCCH region capable of one to three OFDM symbols in a specific subframe and checks whether a PDSCH is transmitted to the UE.
  • the PDSCH is received in the remaining OFDM symbols outside the control region for the resource blocks in the corresponding subframe and then decoded.
  • FIG. 6 illustrates a case in which M UEs confirm PDSCH scheduling in a specific subframe, and the location of PDSCHs to be received by each UE is confirmed by information in a PDCCH existing in all bands in common to all UEs of a corresponding cell.
  • the UE needs to check the PDCCH in the OFDM symbols in front of a specific subframe and receive the PDSCH in all the remaining OFDM symbols in order to decode a single data unit. That is, in the LTE / LTE-Advanced system, the data reception unit of the terminal becomes 1 ms in one subframe.
  • the LTE / LTE-Advanced system is designed assuming 1 ms of data reception unit of the terminal in the frequency band of 6 GHz or less, the time-frequency resource structure as described above and signals for utilizing the corresponding resources are designed.
  • the present exemplary embodiments provide a new time-frequency resource utilization structure that can be used in a high frequency mobile communication system, and a method of transmitting and receiving a signal between a terminal and a base station.
  • embodiments of the present invention provide a resource utilization structure for performing data transmission / reception using a given time-frequency resource when OFDM is used in a high frequency mobile communication system using a frequency band of several tens of GHz, and a terminal and a base station thereof. Provides a method for transmitting and receiving signals.
  • a value corresponding to a multiple of 15 kHz, which is a subcarrier spacing of LTE is set.
  • the entire system band may be configured as 200 MHz and 100 MHz, and one subframe may be configured as 0.1 ms and 0.2 ms, respectively. Then, even in a high frequency mobile communication system, it is possible to take a resource block, a subframe, and a radio frame structure of a form such as LTE / LTE-Advanced.
  • the resource block consists of 12 subcarriers
  • the subframe consists of 14 OFDM symbols
  • the radio frame consists of 10 subframes.
  • a beam is formed and transmitted to the signal to collect the strength of the signal in a specific direction, and when the distance is far from the specific direction, the signal weakens.
  • it is necessary to form and transmit beams to signals that are assumed to be transmitted in all directions in the cell in the existing LTE / LTE-Advanced.
  • FIG. 8 illustrates an antenna structure used to transmit a signal by forming a beam in a high frequency mobile communication system.
  • a base station may have one, two, or four antenna arrays, each antenna array corresponding to two antenna ports.
  • Each antenna port produces one of the beamformed analog beams independently of the other antenna ports.
  • FIG. 9 shows mapping between antenna ports and antenna elements in the case of having one, two, or four antenna arrays for each base station.
  • One antenna port may be connected to the same POLs in a specific antenna array to transmit a signal, and each antenna port may form a plurality of beams independently of each other.
  • PSS / SSS is another part of the high frequency mobile communication system that requires a different design for the existing LTE / LTE-Advanced.
  • PSS / SSS since PSS / SSS is transmitted to detect a uniform signal in a specific cell area, only one PSS / SSS needs to exist for each cell.
  • a plurality of PSS / SSSs In order to have a terminal in the entire cell area and detect the PSS / SSS, a plurality of PSS / SSSs must be operated for each cell.
  • a specific cell must operate N PSS / SSS.
  • the UE when the UE receives a specific PSS / SSS, it must be able to identify which beam the PSS / SSS corresponds to so as to accurately acquire time-frequency synchronization of the corresponding cell.
  • FIG. 10 illustrates a situation in which 14 or 12 beams are applied to PSS / SSS for each antenna port in a specific base station, and PSS / SSS applying different beams are distributed and transmitted to different OFDM symbols in one subframe. have.
  • a specific beam is applied to one PSS / SSS and cell identifier information is included in the PSS / SSS, so that the UE can confirm the OFDM symbol timing and the cell identifier by checking the PSS / SSS.
  • the base station can also obtain the subframe timing by transmitting an ESS to which the same beam as PSS / SSS is applied in the same OFDM symbol.
  • the beam reference signal (BRS) is transmitted at the OFDM symbol timing such as the corresponding PSS / SSS / ESS so that the terminal can also check the beam information.
  • FIG. 10 illustrates the above-described situation and specifically illustrates a case in which a timing and beam acquisition (TBA) subframe is transmitted with a period of 5 ms.
  • TAA timing and beam acquisition
  • a TBA subframe is generated for every K-th subframe such as 0, K, and 2K to include a PSS / SSS / ESS and a beam reference signal (BRS).
  • K-th subframe such as 0, K, and 2K
  • BRS beam reference signal
  • the PSS / SSS / ESS may be mapped in the center of the TBA subframe, and the beam reference signal (BRS) may be mapped to allow the UE to measure various beams at regular intervals.
  • BRS beam reference signal
  • FIG. 11 illustrates the function and related structure of signals transmitted in a TBA subframe in more detail.
  • the PSS may be mapped to six resource blocks located in the middle of the TBA subframe, thereby obtaining OFDM symbol timing.
  • the SSS may be mapped to the upper six resource blocks of the mapped resource blocks and enable the cell ID to be obtained.
  • the ESS may be mapped to the lower six resource blocks of the mapped resource blocks and allow subframe timing to be obtained.
  • the beam reference signal BRS may be distributed and mapped in the entire region except for 18 resource blocks occupied by the PSS / SSS / ESS.
  • the beam reference signal (BRS) enables the terminal to check the beam applied to the signal transmitted to the terminal to measure the beam.
  • the beam reference signal may be mapped to eight consecutive subcarriers among 12 consecutive subcarriers in a resource block to which PSS / SSS / ESS is not mapped, and other signals are mapped to the remaining four subcarriers.
  • the signal may not be mapped.
  • FIG. 12 illustrates possible methods of determining the location of a resource block on which the beam reference signal (BRS) shown in FIG. 11 is transmitted.
  • BRS beam reference signal
  • Option 1 illustrates a method of mapping a beam reference signal (BRS) at L resource block intervals in the order of resource blocks having a low index except for the middle 18 resource blocks (Sync).
  • BRS beam reference signal
  • a beam reference signal may be mapped at intervals of L resource blocks in both directions about a center 18 resource block.
  • the location of the resource block starting the beam reference signal (BRS) transmission may be determined in various ways in each case.
  • the location of the resource block starting the beam reference signal (BRS) transmission may be determined using a function such as Cell-ID and f (A).
  • Cell-ID represents a cell identifier obtained by the terminal from the PSS / SSS
  • f (A) represents a function specific function value with A as an input.
  • FIG. 13 illustrates a mapping relationship between a beam corresponding to each antenna port and a subcarrier within a resource block in a resource block through which the beam reference signal BRS described with reference to FIG. 12 is transmitted.
  • the subcarrier from which the mapping in the resource block starts may be different for each cell identifier, and no signal may be transmitted to the subcarrier not mapped to the antenna port or other signals may be transmitted.
  • f '(B) represents a specific function value that takes B as input.
  • FIG. 14 shows possible mapping relationships of subcarriers, which can be performed by beam-to-beam beam-to-beam signal (BRS) for each port, for the total number of antenna ports of a specific base station.
  • BRS beam-to-beam beam-to-beam signal
  • no signal when no antenna port is mapped, no signal may be transmitted in the corresponding subcarrier, or may be mapped to repeatedly transmit reference signals of existing antenna ports.
  • AP0 and AP1 are transmitted to the T-th and T + 1th subcarriers, respectively, and reference signals are not transmitted on the remaining subcarriers.
  • Option 2 if the number of antenna ports is 2, AP0 is repeatedly transmitted to T, T + 2, T + 4, and T + 6th subcarriers, and AP1 is T + 1 respectively. To the T + 3, T + 5 and T + 7th subcarriers repeatedly.
  • the method for confirming the number of antenna ports used by the base station to the terminal may correspond to a case in which the LTE cell associated with the high frequency base station directly informs the terminal (Non-standalone), and corresponds to the number of antenna ports.
  • the terminal decodes the neighboring data signals by applying the corresponding beam reference signal (BRS) and decodes the terminal to check the number of antenna ports to perform future terminal operations (Standalone). 15 shows the above-described methods.
  • FIG. 16 illustrates operations of a terminal receiving and performing signals existing in the TBA subframe in an initial microwave cell access situation.
  • the terminal first receives a PSS to obtain timing for transmitting OFDM symbols, and further receives an SSS to obtain more accurate timing and ID (Cell-ID) of the corresponding access cell. After receiving the ESS, it is checked how many times the received OFDM symbol corresponds to the corresponding subframe, and the subframe timing is obtained.
  • the terminal receives a beam reference signal (BRS) and a PBCH to obtain a system frame number (SFN), and further confirms the number of BRS ports. That is, the terminal receives the PBCH and checks which system of the cases shown in FIG. 9 is connected to check the total number of ports of the beam reference signal (BRS). In addition, the terminal receives the beam reference signal (BRS) and measures the channel between the terminal from the base station for each antenna port or antenna array.
  • BRS beam reference signal
  • SFN system frame number
  • radio resource management such as reference signal received power (RSRP) or reference signal received quality (RSRQ) information when a terminal receiving a channel from a beam reference signal (BRS) is received; Management, RRM) information is calculated and reported.
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • RSRP and RSRQ can be easily extended from the definition of 3GPP TS 36.214 standard.
  • the first method (Alt 1) in which the UE receives a beam reference signal (BRS) and calculates / reports radio resource management (RRM) information is preferred by the UE based on RSRP or RSRQ values in a specific TBA subframe of a specific cell.
  • RRM radio resource management
  • the UE is as follows. Along with the Cell-ID of the cell, the corresponding OFDM symbol index, antenna array combination and related RRM information will be reported to the base station:
  • the present embodiments are not limited thereto, and consider a method of reporting separate radio resource management (RRM) information for each preferred AP, and wirelessly only for the number of APs acquired through beam reference signal (BRS) or higher information. Consider also how to obtain and report resource management (RRM) information.
  • RRM radio resource management
  • a second method in which a terminal receives a beam reference signal (BRS) and calculates / reports radio resource management (RRM) information is performed by the terminal in an RSRP or RSRQ in a specific TBA subframe of a specific cell.
  • Report all radio resource management (RRM) information for four beam reference signal (BRS) arrays or eight beam reference signal (BRS) ports to the base station for the indices of the preferred OFDM symbols based on the value.
  • the UE will report the corresponding OFDM symbol index and all related radio resource management (RRM) information to the base station together with the Cell-ID of the cell as follows:
  • a third method in which a terminal receives a beam reference signal (BRS) and calculates / reports radio resource management (RRM) information is performed in the terminal.
  • the RSRP or RSRQ is performed in a specific TBA subframe of a specific cell.
  • B is a value obtained by dividing the number of beam reference signal (BRS) antenna ports identified in the PBCH or RRC by two.
  • BRS beam reference signal
  • a UE prefers OFDM symbols 2 and 5 in a specific TBA subframe of a specific cell, antenna arrays 0, ..., B-1, or antenna port 0, ..
  • the UE will report the corresponding OFDM symbol index and all related radio resource management (RRM) information to the base station along with the Cell-ID of the cell as follows:
  • a fourth method in which a UE receives a beam reference signal (BRS) and calculates / reports radio resource management (RRM) information is performed by the UE in RSRP or RSRQ in a specific TBA subframe of a specific cell.
  • the radio resource management (RRM) information is reported to the base station only for AA0 or AP0 for the indexes of the preferred OFDM symbols based on the value.
  • the UE prefers OFDM symbols 2 and 5 in a specific TBA subframe of a specific cell
  • the UE with the Cell-ID of the cell as follows for AA0 or AP0, respectively, in the OFDM symbols.
  • the corresponding OFDM symbol index and related radio resource management (RRM) information will be reported to the base station:
  • FIG. 19 illustrates methods of calculating and reporting channel state information (CSI) such as RI / PMI / CQI by a terminal receiving a channel from a beam reference signal (BRS).
  • CSI channel state information
  • BRS beam reference signal
  • the first method for the UE to receive a beam reference signal (BRS) and to calculate / report channel state information (CSI) is included in the indexes and OFDM symbols of the OFDM symbols preferred by the UE in a specific TBA subframe of a specific cell.
  • the combination of the antenna array indexes and the channel state information (CSI) thereof are reported to the base station together.
  • the channel state information represents channel state information (CSI) corresponding to two ports for each antenna array in consideration of mapping of two antenna ports to one antenna array.
  • the UE is as follows. As such, we will report the corresponding OFDM symbol index, antenna array combination, and related 2-port channel state information (CSI) to the base station:
  • OFDM symbol 2 + AA 0 + 2-port RI / PMI / CQI (for AP0-1)
  • OFDM symbol 2 + AA 1 + 2-port RI / PMI / CQI (for AP2-3)
  • the UE For the method of calculating / reporting the above three channel state information (CSI), the UE always decides to calculate / report the channel state information (CSI) with respect to one selected OFDM symbol and beam reference signal (BRS) array combination. It may be.
  • the channel state information (CSI) may be included in an uplink data channel transmitted first by the terminal in the case of an initial access situation and transmitted.
  • the corresponding channel state information may be reported through a separate feedback channel in the subframe that appears after the kth in the subframe in which the beam reference signal (BRS) is transmitted.
  • the k value may be set to the same value as the subframe difference for the case where the UE receives the data and reports the HARQ feedback thereto, so that the feedback does not collide in two cases.
  • the frequency resource where the channel state information (CSI) is reported may be set by the base station through the RRC or may be determined by the Cell-ID and the terminal identifier.
  • the beam adjusting reference in addition to the beam reference signal (BRS)
  • the signal may further transmit a beam refinement reference signal (BRRS).
  • BRRS beam refinement reference signal
  • a base station schedules and transmits a beam steering reference signal BRRS.
  • the beam steering reference signal BRRS when the beam steering reference signal BRRS is scheduled in subframe n, the beam steering reference signal BRRS may be transmitted in the r th subframe, and then in the k ′ th subframe, Feedback information on the received beam steering reference signal BRRS may be reported to the terminal.
  • r may be fixed to a value equal to 0 or may be determined to be different according to the index of the scheduled subframe.
  • K ' may also be designed to have a fixed value.
  • the feedback information on the beam steering reference signal (BRRS) transmitted in the k'-th subframe after scheduling is preferably Tx beam index information and the preferred antenna array index for the Tx beam as in the beam reference signal (BRS).
  • the information and the associated channel state information (CSI) may be reported.
  • the preferred Tx beam index information and the Q-port channel state information (CSI) may be reported.
  • Q may be a value identified through the PBCH or RRC.
  • 21A and 21B illustrate a structure of a time frequency resource to which the beam steering reference signal BRRS described above is transmitted.
  • the beam steering reference signal BRRS may allow the beam steering reference signal BRRS for a specific antenna port to be transmitted over several consecutive subcarriers.
  • the OFDM symbols to which the same Tx beam is applied may be transmitted while applying hopping to be transmitted on different frequency resources for each OFDM symbol.
  • the same beam steering reference signal BRRS structure may be repeatedly transmitted several times, and may be transmitted by applying different Tx beams to each.
  • the UE may adjust the Rx beam through several OFDM symbols of beam steering reference signals (BRRSs) to which a specific Tx beam is applied.
  • BRRSs beam steering reference signals
  • the UE may report which Tx beam is preferred in the subsequent CSI reporting situation.
  • FIG. 21A and 21B eight OFDM symbols are used for one Tx beam.
  • the present invention is not limited thereto, and four or different values are used, and hopping is applied in a similar manner to apply a beam steering reference signal (BRRS).
  • BRRS beam steering reference signal
  • the beam steering reference signal may be configured to transmit the beam steering reference signal (BRRS) resources for a specific antenna port distributed over the frequency. Similarly, hopping is applied per OFDM symbol. In addition, the same pattern may be transmitted several times in units of several OFDM symbols so that the beam steering reference signal (BRRS) may be transmitted, thereby enabling Tx beam adjustment through Tx beam selection and reporting.
  • FIG. 22 illustrates a configuration of the terminal 2200 in the ultrahigh frequency mobile communication system according to the present embodiments.
  • the terminal 2200 includes a communication unit 2210 and a controller 2220, and the controller 2220 includes a system synchronizer 2221, a channel estimator 2222, and data.
  • the decoder 2223 may be included.
  • the communication unit 2210 of the terminal 2200 receives a signal such as a PSS / SSS, a reference signal (RS), and data transmitted from a base station and transmits the signal to the control unit 2220.
  • a signal such as a PSS / SSS, a reference signal (RS), and data transmitted from a base station and transmits the signal to the control unit 2220.
  • RS reference signal
  • the controller 2220 acquires synchronization from the received signals received from the communication unit 2210, checks beam information, receives a reference signal RS for each purpose of the reference signal RS, and a channel according to the reference signal RS. Estimation and feedback information can be generated, and another reference signal RS can be used to perform data decoding. The feedback information may be reported to the base station through the communication unit 2210.
  • the system synchronizer 2221, the channel estimator 2222, and the data decoder 2223 may be some functions of the controller 2220 or may exist separately.
  • FIG. 23 illustrates a configuration of a base station 2300 in a high frequency mobile communication system according to the present embodiments.
  • the base station 2300 may include a communication unit 2310 and a controller 2320, and the controller 2320 may include a resource allocator 2321.
  • the communication unit 2310 of the base station 2300 transmits signals such as PSS / SSS, reference signal (RS), and data to the terminal, and receives data and channel feedback information from the terminal.
  • signals such as PSS / SSS, reference signal (RS), and data
  • RS reference signal
  • the controller 2320 serves to generate a signal determined for each type and to map the resource, and to map data of the terminal to a specific resource by using feedback information. To this end, the controller 2320 may have a separate resource allocator 2321 or perform a corresponding function as a part of the controller 2320.
  • FIG. 24 illustrates a method for a terminal to receive a signal in a wireless communication system according to the present embodiments.
  • the terminal receives a synchronization signal to which beamforming is applied through a resource block composed of subcarriers set in multiples of 15 kHz from the base station (S2400).
  • the interval of the subcarriers may be set to an interval five times or ten times of 15 kHz.
  • the terminal receives a beam reference signal (BRS) from the base station at the same symbol timing as a symbol for receiving the synchronization signal (S2420).
  • BRS beam reference signal
  • the beam reference signal BRS may be located at resource intervals other than the resource block where the synchronization signal is located in a subframe in which the synchronization signal and the beam reference signal BRS are transmitted.
  • the synchronization signal is located in the center resource block of the subframe and the beam reference signal BRS may be sequentially located from the subcarrier having the low index in the resource block except for the resource block in which the synchronization signal is located.
  • the beam reference signal BRS may be located at regular intervals in both directions of the resource block where the synchronization signal is located.
  • the beam reference signal BRS may be mapped to eight consecutive subcarriers of 12 subcarriers in a resource block in which a synchronization signal is not located.
  • other signals may or may not be mapped to the remaining four subcarriers.
  • the terminal checks the beamforming applied to the synchronization signal from the received beam reference signal (BRS) (S2440).
  • BRS received beam reference signal
  • 25 illustrates a method for transmitting a signal by a base station in a wireless communication system according to the present embodiments.
  • the base station maps a synchronization signal to which beamforming is applied to a resource block composed of subcarriers set in multiples of 15 kHz (S2500).
  • the base station maps a beam reference signal (BRS) for confirming beamforming to which the synchronization signal is applied to the symbol timing to which the synchronization signal is mapped (S2520).
  • BRS beam reference signal
  • the beam reference signal BRS may be sequentially positioned in resource blocks except for resource blocks in which a synchronization signal is located in a subframe, or may be located in both directions of resource blocks in which a synchronization signal is located.
  • the beam reference signal BRS may be mapped to eight consecutive subcarriers in twelve subcarriers, and at this time, other signals may or may not be transmitted to the remaining four subcarriers.
  • the base station transmits a beam reference signal (BRS) to the terminal to confirm the beamforming applied to the synchronization signal and the beamforming is applied to the same symbol timing to the terminal (S2540).
  • BRS beam reference signal
  • the terminal can measure the beam applied to the synchronization signal using the synchronization signal and the beam reference signal (BRS) and obtain information about the cell identifier and time-frequency synchronization from the synchronization signal.
  • BRS beam reference signal
  • FIG. 26 illustrates a process in which a terminal receives a beam reference signal (BRS) and transmits feedback information according to the embodiments.
  • BRS beam reference signal
  • the terminal receives a beam reference signal (BRS) from a base station (S2600).
  • BRS beam reference signal
  • the UE identifies the preferred OFDM symbols based on the RSRP or RSRQ value in the TBA subframe receiving the beam reference signal (BRS) (S2620).
  • BRS beam reference signal
  • the terminal transmits radio resource management (RRM) information or channel state information (CSI) for the antenna port or antenna array for the preferred OFDM symbols to the base station (S2640).
  • RRM radio resource management
  • CSI channel state information
  • the UE may use a combination of preferred antenna port or antenna array indexes based on RSRP or RSRQ value for beam reference signal (BRS) ports included in preferred OFDM symbols and radio resource management (RRM) thereto.
  • Feedback information such as information or channel state information (CSI) may be transmitted.
  • feedback information for all antenna ports or antenna arrays for the indices of preferred OFDM symbols may be transmitted, or feedback information for a specific antenna port or a specific antenna array may be transmitted.
  • B antenna arrays or 2B antenna ports for the indices of preferred OFDM symbols may be transmitted, where B is the number of beam reference signal (BRS) antenna ports identified in PBCH or RRC. It can be divided by.
  • B is the number of beam reference signal (BRS) antenna ports identified in PBCH or RRC. It can be divided by.
  • FIG. 27 illustrates a process of receiving feedback information from a terminal by a base station according to the present embodiments.
  • the base station transmits a beam reference signal (BRS) to the terminal (S2700) and provides feedback information such as radio resource management (RRM) information or channel state information (CSI) for the beam reference signal (BRS). It receives (S2720).
  • RRM radio resource management
  • CSI channel state information
  • the base station may receive the feedback information in the subframe appearing after the kth in the subframe in which the beam reference signal (BRS) is transmitted, where k is a subframe when transmitting the HARQ feedback for the data received by the terminal It may be equal to the difference of.
  • BRS beam reference signal
  • the base station may transmit a beam steering reference signal (BRRS) for adjusting the transmission beam transmitted to a specific terminal or a reception beam of the terminal in the ultra-high frequency mobile communication system (S2740).
  • BRRS beam steering reference signal
  • the beam steering reference signal BRRS when the beam steering reference signal BRRS is scheduled in subframe n, the beam steering reference signal BRRS may be transmitted in the n + r-th subframe, and r may be a fixed value such as 0 or a scheduled subframe. The value may be determined according to the index of.
  • the base station may receive feedback information on the beam steering reference signal BRRS in the n + r + k'th subframe (S2760).
  • k ' may be designed to have a fixed value, and the base station may adjust the transmission beam of the base station or the reception beam of the terminal based on feedback information about the beam steering reference signal BRRS.

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Abstract

Conformément à des modes de réalisation, la présente invention concerne un procédé pour émettre-recevoir un signal de référence de faisceau ou un signal de référence de réglage de faisceau et émettre-recevoir des informations de rétroaction pour ce dernier entre un terminal et une station de base dans un système de communication mobile à ultra haute fréquence, et un appareil pour ce dernier. Le terminal mesure un signal de référence de faisceau ou un signal de référence de réglage de faisceau reçu à partir de la station de base, et transmet à la station de base des informations de rétroaction, telles que des informations de gestion de ressource sans fil ou des informations d'état de canal pour le signal de référence de faisceau ou le signal de référence de réglage de faisceau, permettant ainsi à la station de base de régler un faisceau d'émission de la station de base ou un faisceau de réception du terminal selon les informations de rétroaction reçues par la station de base à partir du terminal, de façon à réduire le bruit de phase entre des sous-porteuses, à surmonter l'atténuation de signal, et à permettre l'émission-réception de signaux entre le terminal et la station de base.
PCT/KR2017/000507 2016-02-04 2017-01-16 Procédé pour qu'un système de communication mobile à ultra haute fréquence émette-reçoive un signal de référence et une rétroaction et appareil associé WO2017135593A1 (fr)

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KR1020160087298A KR20170093675A (ko) 2016-02-04 2016-07-11 다수의 안테나 배열을 가지는 초고주파 이동 통신 시스템의 신호 송수신 방법 및 그 장치
KR10-2016-0087324 2016-07-11
KR1020160087324A KR102379542B1 (ko) 2016-02-26 2016-07-11 초고주파 이동 통신 시스템의 기준 신호 및 피드백 송수신 방법 및 그 장치
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WO2020067691A1 (fr) * 2018-09-24 2020-04-02 삼성전자 주식회사 Procédé et appareil pour la mise en œuvre d'une formation de faisceau dans un système de communication sans fil
US11362714B2 (en) 2018-09-24 2022-06-14 Samsung Electronics Co., Ltd. Method and apparatus for performing beamforming in wireless communication system

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