WO2020031308A1 - Terminal utilisateur - Google Patents

Terminal utilisateur Download PDF

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Publication number
WO2020031308A1
WO2020031308A1 PCT/JP2018/029837 JP2018029837W WO2020031308A1 WO 2020031308 A1 WO2020031308 A1 WO 2020031308A1 JP 2018029837 W JP2018029837 W JP 2018029837W WO 2020031308 A1 WO2020031308 A1 WO 2020031308A1
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WO
WIPO (PCT)
Prior art keywords
unit
transmission
signal
interlace
user terminal
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Application number
PCT/JP2018/029837
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English (en)
Japanese (ja)
Inventor
大輔 村山
浩樹 原田
Original Assignee
株式会社Ｎｔｔドコモ
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Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to PCT/JP2018/029837 priority Critical patent/WO2020031308A1/fr
Publication of WO2020031308A1 publication Critical patent/WO2020031308A1/fr

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    • 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

Definitions

  • the present invention relates to a user terminal in a next-generation mobile communication system.
  • LTE Long Term Evolution
  • Non-Patent Document 1 LTE-Advanced
  • FRA Full Radio Access
  • 4G 5G
  • 5G + plus
  • NR New RAT
  • 3GPP 3 rd Generation Partnership Project
  • the frequency bands (licensed @ band), licensed carrier (licensed @ carrier), licensed component carrier (CC), etc., which are licensed to the communication carrier (operator) are also used.
  • the license CC for example, 800 MHz, 1.7 GHz, 2 GHz, or the like is used.
  • a frequency band different from the above-mentioned license band (unlicensed band (unlicensed @band), unlicensed carrier (unlicensed @carrier), unlicensed CC) Is also supported.
  • the unlicensed band for example, a 2.4 GHz band or a 5 GHz band in which Wi-Fi (registered trademark) or Bluetooth (registered trademark) can be used is assumed.
  • Rel. 13 supports a carrier aggregation (CA: Carrier @ Aggregation) that integrates a carrier (CC) of a licensed band and a carrier (CC) of an unlicensed band.
  • CA Carrier @ Aggregation
  • LAA Liense-Assisted @ Access
  • LAA For the use of LAA, the use of LAA is also being studied in future wireless communication systems (for example, 5G, 5G +, NR, Rel. 15 or later). In the future, LAA may be considered for dual connectivity (DC: Dual @ Connectivity) between the licensed band and the unlicensed band, and also for the stand-alone (SA: Stand-Alone) of the unlicensed band.
  • DC Dual @ Connectivity
  • SA Stand-Alone
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the unlicensed carrier is a band that is shared by a plurality of carriers and the like, whether or not other devices (eg, a base station, a user terminal, a Wi-Fi (registered trademark) device, etc.) have transmitted before transmitting a signal. Listening to make sure. Listening is also called LBT: Listen @ Before @ Talk, CCA: Clear @ Channel @ Assessment, carrier sense or channel access operation: channel @ access @ procedure, and the like.
  • LBT Listen @ Before @ Talk
  • CCA Clear @ Channel @ Assessment
  • carrier sense or channel access operation channel @ access @ procedure, and the like.
  • PAPR peak-to-average power ratio
  • a user terminal configures a transmission unit that transmits an uplink signal using an interlace in a carrier where listening is performed before transmission, and configures the interlace in a predetermined bandwidth in the carrier. And a control unit for determining a frequency resource unit.
  • FIG. 6 is a diagram illustrating an example of an interlace in SC units according to a first example. It is a figure showing an example of interlace of RB unit and SC unit concerning a 2nd example. It is a figure showing other examples of interlace of RB unit and SC unit concerning the 2nd example.
  • 1 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to the present embodiment.
  • FIG. 3 is a diagram illustrating an example of an overall configuration of a base station according to the present embodiment.
  • FIG. 3 is a diagram illustrating an example of a functional configuration of a base station according to the present embodiment.
  • FIG. 3 is a diagram illustrating an example of an overall configuration of a user terminal according to the present embodiment.
  • FIG. 3 is a diagram illustrating an example of a functional configuration of a user terminal according to the present embodiment.
  • FIG. 3 is a diagram illustrating an example of a hardware configuration of a base station and a user terminal according to the present embodiment.
  • the license carrier is a carrier of a frequency exclusively assigned to one operator.
  • An unlicensed carrier is a carrier of a frequency shared by a plurality of operators, RATs, and the like.
  • the license carrier is also called a component carrier (CC: Component @ Carrier), a cell, a primary cell (PCell: Primary @ Cell), a secondary cell (SCell: Secondary @ Cell), a primary secondary cell (PSCell: Primary @ Secondary @ Cell), and the like.
  • the unlicensed carrier is also called NR-U (NR-Unlicensed), CC, unlicensed CC, cell, LAA @ SCell (License-Assisted @ Access @ SCell), or the like.
  • LAA Licensed Assisted Access
  • LAA Licensed Assisted Access
  • LAA Licensed Assisted Access
  • SA standalone
  • a transmission point that performs communication using an unlicensed carrier is prohibited from transmitting on the unlicensed carrier when it detects another device communicating with the unlicensed carrier.
  • the “transmission point” is, for example, called a base station, gNB (gNodeB), eNB (eNodeB), user terminal (UE: User Terminal), transmission / reception point (TRP: Transmission Reception Point), terminal, device, or the like. Is also good.
  • the “other device” may be another transmission point or a device of another system (such as Wi-Fi).
  • the transmission point performs listening (LBT) at a timing that is a predetermined period before the transmission timing. More specifically, the transmission point for executing the LBT is the entire target carrier band (for example, one component carrier (CC: Component @ Carrier)) at a timing (for example, the immediately preceding subframe) that is a predetermined period before the transmission timing. ) To check whether another device is communicating in the carrier band.
  • LBT listening
  • the transmission point for executing the LBT is the entire target carrier band (for example, one component carrier (CC: Component @ Carrier)) at a timing (for example, the immediately preceding subframe) that is a predetermined period before the transmission timing. )
  • CC Component @ Carrier
  • the term “listening” refers to detecting / measuring whether a signal exceeding a predetermined level (for example, predetermined power) is transmitted from another device before a certain transmission point transmits a signal.
  • the listening performed by the transmission point is also called LBT (Listen Before Talk), CCA (Clear Channel Assessment), carrier sense or channel access operation (channel access procedure), or the like.
  • LBT Listen Before Talk
  • CCA Carrier Channel Assessment
  • carrier sense or channel access operation channel access procedure
  • an access method with collision control also referred to as Receiver @ assisted access, Receiver @ assisted @ LBT may be applied.
  • the transmission point can confirm that no other device is communicating, it transmits using the carrier. For example, when the reception power measured by listening is equal to or less than a predetermined threshold, the transmission point determines that the channel is in a free state and performs transmission.
  • the channel is free means that the channel is not occupied by a specific system, and that the channel is idle, the channel is clear, the channel is free, and so on.
  • the transmission point stops its transmission process. For example, if the transmission point detects that the reception power of a signal from another device related to the band exceeds a predetermined threshold, the transmission point determines that the channel is busy and does not transmit. In the case of the busy state, the channel becomes available only after it has again listened and confirmed that it is in the free state. Note that the method of determining the free / busy state of the channel by the LBT is not limited to this.
  • interference between the LAA and another system is introduced into the transmission point by introducing interference control within the same frequency based on the LBT mechanism. Interference between them can be avoided. Further, even when the control of the transmission point is independently performed for each operator operating the LAA system, interference can be reduced without grasping the contents of each control by the LBT.
  • RA random access
  • Random access is performed at the time of initial connection, synchronization establishment, communication resumption, and the like, and can be divided into two types: contention-based random access (CBRA) and non-collision random access (Non-CBRA). It can.
  • the non-collision type random access may be called contention-free RA (CFRA: Contention-Free @ Random @ Access).
  • a user terminal transmits a preamble randomly selected from a plurality of random access preambles (contention preamble) prepared in a cell, over a physical random access channel (PRACH: Physical Random Access Channel).
  • contention preamble Random access preamble
  • PRACH Physical Random Access Channel
  • the user terminal transmits a user terminal-specific (UE-specific) random access preamble (dedicated preamble) allocated from the network in advance on the PRACH.
  • UE-specific user terminal-specific random access preamble
  • the collision type random access may be performed, for example, at the time of initial connection, start or restart of uplink communication, and the like.
  • the non-collision random access may be performed, for example, at the time of handover, start or restart of downlink communication, and the like.
  • LAA @ SCell non-collision random access is assumed, but collision random access may be performed.
  • the RA (Random Access) preamble using each PRACH format includes a RACH OFDM symbol. Further, the RA preamble may include at least one of a cyclic prefix (CP) and a guard period (GP).
  • CP cyclic prefix
  • GP guard period
  • PRACH formats 0 to 3 shown in FIG. 1 use a long sequence (long sequence) preamble sequence in a RACH @ OFDM symbol.
  • the PRACH formats A1 to A3, B1 to B4, C0, and C2 shown in FIG. 2 use a short sequence (short sequence) preamble sequence in a RACH @ OFDM symbol.
  • the frequency of the unlicensed carrier may be within the frequency range of FR (Frequency @ Range) 1 and FR2.
  • FR1 may be a frequency range lower than the predetermined frequency
  • FR2 may be a frequency range higher than the predetermined frequency.
  • the predetermined frequency may be 7 GHz.
  • FR1 may be a 5 GHz band or a 6 GHz band.
  • FR2 may be in the 60 GHz band.
  • the preamble sequence may be a Zadoff-Chu (ZC) sequence.
  • the preamble sequence length may be either 839 (long sequence) or 139.
  • the preamble sequence may be mapped to a frequency resource (eg, a subcarrier) allocated to the PRACH.
  • the RA preamble may use one of a plurality of new melodies.
  • the subcarrier interval (SubCarrier @ Spacing: SCS) for the long sequence of FR1 of NR may be any of 1.25 and 5 kHz.
  • the SCS for the short sequence of FR1 of NR may be either 15, 30 kHz.
  • the SCS for the short sequence of FR2 of NR may be either 60 or 120 kHz.
  • the SCS for the long sequence of LTE may be 1.25 kHz.
  • the SCS for LTE short sequence may be 7.5 kHz.
  • the occupied channel bandwidth containing 99% of the power of the signal (OCB: Occupied ⁇ Channel ⁇ Bandwidth) must be at least 80% of the available bandwidth (eg, system bandwidth).
  • PSD Power @ Spectral @ Density
  • the PRACH may not satisfy the OCB rules.
  • other uplink signals for example, an uplink control channel (PUCCH: Physical Uplink Control Channel), an uplink shared channel (PUSCH: Physical Uplink Shared Channel)
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • interlaced transmission is transmission using a set (interlace) of a plurality of frequency resources allocated at predetermined intervals (predetermined intervals, predetermined frequency intervals) within a predetermined bandwidth.
  • the interlaced transmission is also called multi-cluster transmission, block IFDMA (Block Interleaved Frequency Division Division Multiple Access), or the like.
  • a physical resource block (PRB: Physical ⁇ Resource ⁇ Block) (also referred to as a resource block (RB)) unit or a sub-RB unit is considered.
  • PRB Physical ⁇ Resource ⁇ Block
  • RB resource block
  • One RB is composed of 12 subcarriers.
  • the sub RB may be configured by the number of subcarriers obtained by multiplying the number of subcarriers in one RB by a predetermined coefficient ⁇ ( ⁇ ⁇ 1). For example, 1/2 RB may be configured with 6 subcarriers.
  • ⁇ resource block
  • Each frequency resource in the interlace is also called a cluster or the like.
  • FIG. 4 is a diagram showing an example of interlace in RB units.
  • the free bandwidth (total usable bandwidth) detected by listening is 20 MHz (for example, 100 RB)
  • the interlace #i has an index value of ⁇ i, i + 10, i + 20,. It is composed of 10 RBs (10 clusters) that is i + 90 °.
  • interlaces # 0 to # 9 are provided.
  • One or more interlaces may be allocated to the user terminal as frequency resources for uplink signals.
  • the uplink signal is assigned to 10 RBs # 0, # 10, # 20, # 30, # 40, # 50, # 60, # 70, and # 80 in interlace # 0. , # 90. Since each RB includes 12 subcarriers, when interlace # 0 is used, an uplink signal is transmitted using 10 sets of continuous 12 subcarriers.
  • the PAPR increases as the number of subcarriers (the number of consecutive subcarriers) in the cluster increases.
  • the performance of the PRACH may be degraded (for example, the detection rate may be reduced).
  • Such a problem may occur in other uplink signals (for example, an uplink control channel (PUCCH: Physical Uplink Control Channel), an uplink shared channel (PUSCH: Physical Uplink Shared Channel)), and the like.
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the interlace unit can be rephrased as a frequency resource unit forming the interlace, a unit of each cluster forming the interlace, or the like.
  • the present inventors determine the interlace unit to be a unit smaller than the RB (for example, a subcarrier (SC) unit), so that the number of subcarriers in the cluster (the number of consecutive subcarriers) And to suppress the increase in PAPR.
  • SC subcarrier
  • the present embodiment will be described in detail with reference to the drawings.
  • an unlicensed carrier will be described.
  • the present invention is applicable to transmission of an uplink signal on any carrier (for example, a license carrier) as long as interlaced transmission is applied.
  • the uplink signal transmitted using interlace includes, for example, a random access channel (also referred to as a PRACH, a random access preamble, a RACH preamble, a preamble, and the like), and an uplink control channel (PUCCH: Physical ⁇ Uplink ⁇ Shared). Channel) and at least one of an uplink shared channel (for example, PUSCH: Physical @ Uplink @ Shared @ Channel).
  • a random access channel also referred to as a PRACH, a random access preamble, a RACH preamble, a preamble, and the like
  • PUCCH Physical ⁇ Uplink ⁇ Shared
  • Channel at least one of an uplink shared channel
  • PUSCH Physical @ Uplink @ Shared @ Channel
  • the user terminal Based on the total number of subcarriers in a predetermined bandwidth (for example, a vacant band detected by listening) in an unlicensed carrier (a carrier on which listening is performed before transmission), the user terminal determines a predetermined interval for forming an interlace.
  • a plurality of subcarriers (one or more subcarriers included in each of a plurality of clusters at a predetermined interval) may be determined.
  • the user terminal may determine the total number of subcarriers (y_RE) constituting the predetermined bandwidth (y_BW), the number of subcarriers used for transmitting an uplink signal (x_SC), and the number of continuous subcarriers in an interlace (each cluster). (X_CONSIGRE), the interval between clusters in one interlace (the number of subcarriers between clusters) (x_INTRE) may be controlled.
  • a resource element (RE: Resource @ Element) includes one subcarrier in the frequency domain and one symbol in the time domain. Therefore, the “subcarrier” can be rephrased as a unit in the frequency domain of the RE. For this reason, in the present embodiment, when the time domain is not considered, “subcarrier” may be paraphrased as “RE”.
  • the user terminal may determine the interval (number of subcarriers) (x_INTRE) between clusters in the interlace using the following steps 1 to 3.
  • step 1 the user terminal determines the total number of subcarriers (y_RE) constituting the predetermined bandwidth based on a predetermined bandwidth (y_BW [Hz]) and a subcarrier interval (x_SCS [Hz]). You may.
  • step 2 the user terminal determines the number of continuous subcarriers in the interlace based on the number of subcarriers used for transmitting the uplink signal (x_SC) and the total number of subcarriers constituting the predetermined bandwidth (y_RE). (X_CONSIGRE) may be determined.
  • step 3 the total number of subcarriers (y_RE) constituting the entire bandwidth used, determined in step 1, the total number of subcarriers (x_SC) used for uplink signal transmission, determined in step 2,
  • the number of subcarriers (x_INTRE) that is an interval between clusters in the interlace may be determined based on at least one of the number of consecutive subcarriers in the interlace (x_CONSIGRE).
  • equations (1) to (3) are merely examples, and at least some of the parameters may be omitted, or other parameters may be added.
  • FIG. 5 is a diagram showing an example of an interlace in SC units according to the first example.
  • the number of subcarriers in each cluster (the number of consecutive subcarriers in the cluster)
  • x_CONSIGRE is a free bandwidth detected in the unlicensed carry. May be determined based on the total number of subcarriers y_RE in the subcarriers and the number of subcarriers x_SC used for transmitting the uplink signal (for example, see the above equation (2)).
  • x_CONSIGRE may be one subcarrier.
  • the interval between clusters (the number of subcarriers) x_INTRE may be determined based on the total number of subcarriers y_RE, the number of subcarriers x_SC used for transmitting an uplink signal, and the number of continuous subcarriers x_CONSIGRE (for example, the above equation) (3)).
  • the interlace in SC units shown in FIG. 5 is merely an example, and is not limited to this.
  • the intervals between clusters in the interlace may not be uniform, and at least some of the intervals in the interlace may be different from other intervals.
  • each cluster in the interlace used for transmitting the uplink signal is configured by a unit smaller than RB (for example, SC unit). For this reason, the number of consecutive subcarriers in the interlace (the number of subcarriers in each cluster) can be reduced, so that an increase in PAPR can be suppressed while observing the OCB restrictions.
  • the user terminal may switch the interlace unit according to the type of the uplink signal. For example, when transmitting the PRACH or PUCCH, the user terminal may use interlace in units of SC. On the other hand, when transmitting the PUSCH, the user terminal may use interlace in units of RBs or sub-RBs.
  • the unit of which cluster is used for which uplink signal is not limited to the above.
  • the user terminal When transmitting the PRACH or the PUCCH, the user terminal may use an interlace configured in RB units or sub-RB units.
  • the user terminal when transmitting the PUSCH, the user terminal may use an interlace configured in SC units.
  • the user terminal may receive information on interlace units (interlace unit information). For example, the user terminal may receive interlace unit information by higher layer signaling. Also, the user terminal may receive interlace unit information for each type of uplink signal (for example, PRACH, PUCCH or PUSCH).
  • interlace unit information for example, PRACH, PUCCH or PUSCH.
  • the upper layer signaling may be, for example, at least one of the following: RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling (eg, MAC CE (Control Element), MAC PDU (Protocol Data Unit)), Information transmitted by a broadcast channel (for example, PBCH: Physical Broadcast Channel) (for example, a master information block (MIB)); System information (for example, system information block (SIB: System Information Block), minimum system information (RMSI: Remaining Minimum System Information), other system information (OSI: Other System Information)).
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • MAC CE Control Element
  • MAC PDU Protocol Data Unit
  • Information transmitted by a broadcast channel for example, PBCH: Physical Broadcast Channel
  • MIB master information block
  • SIB System Information Block
  • RMSI Remaining Minimum System Information
  • OSI Other System Information
  • the user terminal may determine the interlace unit used for transmitting the uplink signal based on the received interlace unit information.
  • the interlace used for transmission of the uplink signal is specified using at least one of upper layer signaling and physical layer signaling (for example, downlink control information (DCI: Downlink Control Information)). Is also good.
  • the user terminal may receive information indicating the index (number) of the interlace by at least one of higher layer signaling and physical layer signaling.
  • the user terminal may switch the interlace unit according to the time domain in which the uplink signal is transmitted or the time domain. For example, a different unit of interlace may be used for each of a predetermined range of time domain resources. Alternatively, a different unit of interlace may be used for each of a predetermined range of frequency domain resources (predetermined bands).
  • FIG. 6 is a diagram showing an example of an interlace in RB units and SC units according to the second example. For example, in FIG. 6, it is assumed that the interlace unit is switched for each slot. Note that the time domain resources in the predetermined range in which the interlace unit is switched are not limited to those shown in FIG. 6 and may be one or more slots.
  • an interlace in RB units is assigned to an uplink signal (for example, PUSCH).
  • an interlace in SC units is assigned to an uplink signal (for example, PRACH or PUCCH).
  • the interlace slot # 0 in RB units and the interlace slot # 1 in SC units are continuous, but need not be.
  • FIG. 7 is a diagram showing another example of the interlace of the RB unit and the SC unit according to the second embodiment.
  • the predetermined band may be, for example, a partial band (bandwidth part (BWP: Bandwidth @ Part)) in the unlicensed carrier, one or more RBs, or one or more resource block groups (RBG).
  • BWP Bandwidth part
  • RBG resource block groups
  • an interlace in RB units is assigned to an uplink signal (for example, PUSCH).
  • an interlace in SC units is assigned to an uplink signal (for example, PRACH or PUCCH).
  • the interlace band # 0 in RB units and the interlace band # 1 in SC units are continuous, but need not be.
  • an unlicensed carrier has been described as an example, but the present invention may be applied to a licensed carrier. Further, more generally, the present invention may be applied to a carrier that requires listening before transmission (a carrier to which listening is set), or a carrier that does not require listening before transmission (a carrier to which listening is not set). ) May be applied.
  • the first and second aspects may be applied to downlink signals as well as uplink signals.
  • the first and second aspects may be applied to any operation form of the LAA system, such as dual connectivity (DC) with a license carrier, carrier aggregation (CA), or stand-alone (SA).
  • DC dual connectivity
  • CA carrier aggregation
  • SA stand-alone
  • an unlicensed carrier may be used for at least one cell.
  • the number of subcarriers in each cluster (the number of consecutive subcarriers) x_CONSIGRE, the interval between clusters x_INTRE, the subcarrier interval x_SCS, the available bandwidth in the carrier
  • the present invention is not limited to this. At least one of x_CONSIGRE, x_INTRE, x_SCS, and y_RE may be fixedly determined.
  • the base station may also notify the user terminal of configuration information (for example, a subcarrier interval, the number of subcarriers per RB, a predetermined bandwidth, etc.) related to interlaced transmission.
  • configuration information for example, a subcarrier interval, the number of subcarriers per RB, a predetermined bandwidth, etc.
  • the information may be notified by at least one of higher layer signaling and physical layer signaling.
  • wireless communication system (Wireless communication system)
  • communication is performed using any of the wireless communication methods according to the above embodiments of the present invention or a combination thereof.
  • FIG. 8 is a diagram showing an example of a schematic configuration of the wireless communication system according to the present embodiment.
  • carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a unit of a system bandwidth (for example, 20 MHz) of an LTE system are applied. can do.
  • DC dual connectivity
  • the wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G. (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system that realizes these.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-B LTE-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • FRA Full Radio Access
  • New-RAT Radio Access Technology
  • the wireless communication system 1 includes a base station 11 forming a macro cell C1 having relatively wide coverage, and a base station 12 (12a to 12c) arranged in the macro cell C1 and forming a small cell C2 smaller than the macro cell C1.
  • a base station 11 forming a macro cell C1 having relatively wide coverage
  • a base station 12 (12a to 12c) arranged in the macro cell C1 and forming a small cell C2 smaller than the macro cell C1.
  • user terminals 20 are arranged in the macro cell C1 and each small cell C2. The arrangement of each cell and the user terminal 20 is not limited to the illustrated one.
  • the wireless communication system 1 may support dual connectivity between a plurality of RATs (Radio Access Technology) (multi-RAT dual connectivity (MR-DC).
  • the LTE (E-UTRA) base station (eNB) becomes a master node (MN), and the NR base station (gNB) becomes a secondary node (SN).
  • Dual connectivity NE-DC: NR) between NR and LTE -E-UTRA Dual Connectivity) or the like.
  • the user terminal 20 can be connected to both the base station 11 and the base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 simultaneously by CA or DC. In addition, the user terminal 20 may apply CA or DC using a plurality of cells (CCs) (for example, five or less CCs and six or more CCs).
  • CCs cells
  • Communication between the user terminal 20 and the base station 11 can be performed using a carrier having a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (also referred to as an existing carrier or a legacy carrier).
  • a carrier having a relatively high frequency band for example, 3.5 GHz, 5 GHz, or the like
  • a wide bandwidth may be used, or between the user terminal 20 and the base station 11.
  • the same carrier as described above may be used. Note that the configuration of the frequency band used by each base station is not limited to this.
  • a wired connection for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface, or the like
  • a wireless connection is used. can do.
  • the base station 11 and each base station 12 are respectively connected to the upper station apparatus 30, and are connected to the core network 40 via the upper station apparatus 30.
  • the higher station apparatus 30 includes, for example, an access gateway apparatus, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto.
  • RNC radio network controller
  • MME mobility management entity
  • each base station 12 may be connected to the higher station apparatus 30 via the base station 11.
  • the base station 11 is a base station having relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
  • the base station 12 is a base station having local coverage, such as a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), and a transmission / reception point. May be called.
  • a base station 10 when the base stations 11 and 12 are not distinguished, they are collectively referred to as a base station 10.
  • Each user terminal 20 is a terminal corresponding to various communication systems such as LTE and LTE-A, and may include not only mobile communication terminals (mobile stations) but also fixed communication terminals (fixed stations).
  • Orthogonal Frequency Division Multiple Access (OFDMA) is applied to the downlink as a wireless access method, and Single Carrier-Frequency Division Multiple Access (SC-FDMA: Single Carrier) is applied to the uplink. Frequency Division Multiple Access) is applied.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier
  • OFDMA is a multicarrier transmission scheme in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers), and data is mapped to each subcarrier for communication.
  • SC-FDMA is a single-carrier transmission scheme that divides the system bandwidth into bands each consisting of one or continuous resource blocks for each terminal, and reduces interference between terminals by using different bands for a plurality of terminals. is there.
  • the uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.
  • a downlink shared channel (PDSCH: Physical Downlink Shared Channel), a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel and the like shared by each user terminal 20 are used. Used. User data, upper layer control information, SIB (System @ Information @ Block), and the like are transmitted by PDSCH. In addition, MIB (Master ⁇ Information ⁇ Block) is transmitted by PBCH.
  • PDSCH Physical Downlink Shared Channel
  • PBCH Physical Broadcast Channel
  • SIB System @ Information @ Block
  • MIB Master ⁇ Information ⁇ Block
  • Downlink L1 / L2 control channels include PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel) and the like.
  • Downlink control information (DCI: Downlink Control Information) including PDSCH and PUSCH scheduling information is transmitted by the PDCCH.
  • the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
  • the PHICH transmits HARQ (Hybrid Automatic Repeat Repeat reQuest) acknowledgment information (for example, retransmission control information, HARQ-ACK, ACK / NACK, etc.) for the PUSCH.
  • the EPDCCH is frequency-division multiplexed with a PDSCH (Downlink Shared Data Channel) and used for transmission of DCI and the like like the PDCCH.
  • an uplink shared channel (PUSCH: Physical Uplink Shared Channel), an uplink control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH: Physical Random Access Channel) or the like is used.
  • PUSCH is used to transmit user data, higher layer control information, and the like.
  • downlink radio quality information (CQI: Channel Quality Indicator), acknowledgment information, and the like are transmitted by PUCCH.
  • the PRACH transmits a random access preamble for establishing a connection with a cell.
  • a cell-specific reference signal CRS
  • CSI-RS channel state information reference signal
  • DMRS demodulation reference signal
  • PRS Positioning Reference Signal
  • a reference signal for measurement SRS: Sounding Reference Signal
  • DMRS reference signal for demodulation
  • the DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal). Further, the transmitted reference signal is not limited to these.
  • FIG. 9 is a diagram showing an example of the overall configuration of the base station according to the present embodiment.
  • the base station 10 includes a plurality of transmitting / receiving antennas 101, an amplifier unit 102, a transmitting / receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
  • the transmitting / receiving antenna 101, the amplifier unit 102, and the transmitting / receiving unit 103 may be configured to include at least one each.
  • the baseband signal processing unit 104 regarding user data, processing of a PDCP (Packet Data Convergence Protocol) layer, division / combination of user data, transmission processing of an RLC layer such as RLC (Radio Link Control) retransmission control, and MAC (Medium Access) Control) Transmission / reception control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, precoding processing, etc., and transmission / reception processing are performed.
  • RLC Radio Link Control
  • MAC Medium Access
  • Transmission / reception control for example, HARQ transmission processing
  • scheduling transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, precoding processing, etc.
  • IFFT inverse fast Fourier transform
  • the transmission / reception unit 103 converts the baseband signal precoded and output from the baseband signal processing unit 104 for each antenna into a radio frequency band, and transmits the radio frequency band.
  • the radio frequency signal frequency-converted by the transmitting / receiving section 103 is amplified by the amplifier section 102 and transmitted from the transmitting / receiving antenna 101.
  • the transmission / reception unit 103 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field of the present invention. Note that the transmission / reception unit 103 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.
  • a radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102.
  • the transmitting / receiving section 103 receives the upstream signal amplified by the amplifier section 102.
  • Transmitting / receiving section 103 frequency-converts the received signal into a baseband signal and outputs the baseband signal to baseband signal processing section 104.
  • the baseband signal processing unit 104 performs fast Fourier transform (FFT: Fast Fourier Transform), inverse discrete Fourier transform (IDFT), and error correction on user data included in the input uplink signal. Decoding, reception processing of MAC retransmission control, reception processing of the RLC layer and PDCP layer are performed, and the data is transferred to the upper station apparatus 30 via the transmission path interface 106.
  • the call processing unit 105 performs call processing (setting, release, etc.) of a communication channel, state management of the base station 10, management of radio resources, and the like.
  • the transmission path interface 106 transmits and receives signals to and from the higher-level station device 30 via a predetermined interface.
  • the transmission line interface 106 transmits and receives signals (backhaul signaling) to and from another base station 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface). Is also good.
  • FIG. 10 is a diagram showing an example of a functional configuration of the base station according to the present embodiment.
  • functional blocks of characteristic portions in the present embodiment are mainly shown, and it is assumed that base station 10 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 104 includes at least a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. Note that these configurations need only be included in base station 10, and some or all of the configurations need not be included in baseband signal processing section 104.
  • the control unit (scheduler) 301 controls the entire base station 10.
  • the control unit 301 can be configured by a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
  • the control unit 301 controls, for example, signal generation by the transmission signal generation unit 302, signal assignment by the mapping unit 303, and the like. Further, the control unit 301 controls a signal reception process by the reception signal processing unit 304, a signal measurement by the measurement unit 305, and the like.
  • the control unit 301 controls the scheduling (for example, resource allocation) of a downlink signal (for example, PDSCH, PDCCH, synchronization signal, etc.) and an uplink signal (for example, PUSCH, PUCCH, PRACH, etc.).
  • a downlink signal for example, PDSCH, PDCCH, synchronization signal, etc.
  • an uplink signal for example, PUSCH, PUCCH, PRACH, etc.
  • Transmission signal generation section 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from control section 301, and outputs the generated signal to mapping section 303.
  • the transmission signal generation unit 302 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
  • the transmission signal generation unit 302 generates a DL assignment for notifying downlink signal allocation information and a UL grant for notifying uplink signal allocation information, based on an instruction from the control unit 301, for example.
  • the downlink data signal is subjected to an encoding process and a modulation process according to an encoding rate, a modulation scheme, and the like determined based on channel state information (CSI: Channel ⁇ State ⁇ Information) from each user terminal 20 or the like.
  • CSI Channel ⁇ State ⁇ Information
  • Mapping section 303 maps the downlink signal generated by transmission signal generation section 302 to a predetermined radio resource based on an instruction from control section 301, and outputs the result to transmission / reception section 103.
  • the mapping unit 303 can be composed of a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, and decoding) on the reception signal input from the transmission / reception unit 103.
  • the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
  • the reception signal processing unit 304 can be configured from a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when a PUCCH including HARQ-ACK is received, HARQ-ACK is output to control section 301. Further, the reception signal processing unit 304 outputs the reception signal and / or the signal after the reception processing to the measurement unit 305.
  • the measurement unit 305 performs measurement on the received signal.
  • the measurement unit 305 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present invention.
  • measurement unit 305 Based on an instruction from control unit 301, measurement unit 305 performs LBT on a carrier (for example, an unlicensed carrier) in which the LBT is set, and obtains an LBT result (for example, whether the channel state is free or busy). May be output to the control unit 301.
  • a carrier for example, an unlicensed carrier
  • LBT result for example, whether the channel state is free or busy
  • the measurement unit 305 receives the received power of the received signal (for example, RSRP (Reference Signal Received Power)), received quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio)), and uplink. You may measure about propagation path information (for example, CSI). The measurement result may be output to the control unit 301.
  • RSRP Reference Signal Received Power
  • received quality for example, RSRQ (Reference Signal Received Quality)
  • SINR Signal to Interference plus Noise Ratio
  • the transmitting / receiving section 103 may receive an uplink signal (for example, PRACH, PUCCH, PUSCH, etc.). Specifically, transmission / reception section 103 transmits a plurality of frequency resources (for example, a plurality of RBs, a plurality of subcarriers, or a plurality of subcarriers) arranged at predetermined intervals within a predetermined bandwidth in a carrier on which listening is performed before transmission.
  • the uplink signal may be received using an interlace composed of sub-RBs of the sub-RBs.
  • the transmitting / receiving unit 103 may transmit a downlink signal.
  • transmission / reception section 103 transmits a plurality of frequency resources (for example, a plurality of RBs, a plurality of subcarriers) arranged at predetermined frequency intervals within a predetermined bandwidth in a carrier on which listening is performed before transmission.
  • the downlink signal may be transmitted using an interlace configured by a plurality of sub RBs.
  • the transmission / reception section 103 may also transmit information (interlace unit information) on a frequency resource unit (interlace unit) constituting the interlace.
  • the transmitting / receiving section 103 may transmit the configuration information (configuration information) of the uplink signal for each type of uplink signal (for example, PRACH, PUCCH, PUSCH, etc.).
  • the control unit 301 transmits a downlink signal to a transmission signal generation unit 302 and a mapping unit 303 on a carrier (for example, an unlicensed carrier) that performs listening before downlink transmission, according to the LBT result obtained by the measurement unit 305. May be controlled.
  • a carrier for example, an unlicensed carrier
  • the control unit 301 may control transmission of interlace unit information. Further, control section 301 may control the transmission of the setting information of the uplink signal.
  • control section 301 may control resource allocation for uplink signals based on interlace units. Specifically, a predetermined range of time-domain resources or frequency-domain resources is determined for each interlace unit, and the control unit 301 assigns a time-domain resource or a frequency-domain resource corresponding to the interlace unit used for uplink signal transmission, It may be assigned to the uplink signal.
  • FIG. 11 is a diagram illustrating an example of the overall configuration of the user terminal according to the present embodiment.
  • the user terminal 20 includes a plurality of transmitting / receiving antennas 201, an amplifier unit 202, a transmitting / receiving unit 203, a baseband signal processing unit 204, and an application unit 205.
  • the transmitting / receiving antenna 201, the amplifier unit 202, and the transmitting / receiving unit 203 may be configured to include at least one each.
  • the radio frequency signal received by the transmitting / receiving antenna 201 is amplified by the amplifier unit 202.
  • the transmission / reception unit 203 receives the downlink signal amplified by the amplifier unit 202.
  • the transmitting / receiving section 203 converts the frequency of the received signal into a baseband signal and outputs the baseband signal to the baseband signal processing section 204.
  • the transmission / reception unit 203 can be configured from a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present invention. Note that the transmission / reception unit 203 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.
  • the baseband signal processing unit 204 performs FFT processing, error correction decoding, reception processing for retransmission control, and the like on the input baseband signal.
  • the downlink user data is transferred to the application unit 205.
  • the application unit 205 performs processing related to layers higher than the physical layer and the MAC layer. Also, of the downlink data, broadcast information may be transferred to the application unit 205.
  • uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
  • the baseband signal processor 204 performs retransmission control transmission processing (eg, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like, and performs transmission / reception processing. Transferred to 203.
  • the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits the radio frequency band.
  • the radio frequency signal frequency-converted by the transmission / reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
  • FIG. 12 is a diagram showing an example of a functional configuration of the user terminal according to the present embodiment.
  • functional blocks of characteristic portions in the present embodiment are mainly shown, and it is assumed that the user terminal 20 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 204 of the user terminal 20 includes at least a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. Note that these configurations need only be included in the user terminal 20, and some or all of the configurations need not be included in the baseband signal processing unit 204.
  • the control unit 401 controls the entire user terminal 20.
  • the control unit 401 can be configured by a controller, a control circuit, or a control device that is described based on common recognition in the technical field according to the present invention.
  • the control unit 401 controls, for example, signal generation by the transmission signal generation unit 402, signal assignment by the mapping unit 403, and the like.
  • the control unit 401 also controls signal reception processing by the reception signal processing unit 404, signal measurement by the measurement unit 405, and the like.
  • the control unit 401 controls the reception of DCI. Specifically, control section 401 monitors the search space (blind decoding) and detects DCI. The control unit 401 may control the reception of the PDSCH based on the DCI. Further, control section 401 may control the transmission of the PUSCH based on the DCI.
  • control unit 401 When the control unit 401 acquires various information notified from the base station 10 from the reception signal processing unit 404, the control unit 401 may update parameters used for control based on the information.
  • Transmission signal generation section 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on an instruction from control section 401 and outputs the generated signal to mapping section 403.
  • the transmission signal generation unit 402 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
  • the transmission signal generation unit 402 generates an uplink control signal related to acknowledgment information, channel state information (CSI), and the like based on an instruction from the control unit 401, for example. Further, transmission signal generating section 402 generates an uplink data signal based on an instruction from control section 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the downlink control signal notified from the base station 10 includes a UL grant.
  • CSI channel state information
  • Mapping section 403 maps the uplink signal generated by transmission signal generation section 402 to a radio resource based on an instruction from control section 401, and outputs the result to transmission / reception section 203.
  • the mapping unit 403 can be composed of a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, and decoding) on the reception signal input from the transmission / reception unit 203.
  • the received signal is, for example, a downlink signal (a downlink control signal, a downlink data signal, a downlink reference signal, etc.) transmitted from the base station 10.
  • the reception signal processing unit 404 can be configured from a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention. Further, the reception signal processing unit 404 can constitute a reception unit according to the present invention.
  • the reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401.
  • the reception signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401. Further, the reception signal processing unit 404 outputs the reception signal and / or the signal after the reception processing to the measurement unit 405.
  • the measuring unit 405 measures the received signal. For example, the measurement unit 405 performs measurement using the downlink reference signal transmitted from the base station 10.
  • the measurement unit 405 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present invention.
  • measurement unit 405 Based on an instruction from control unit 401, measurement unit 405 performs LBT on a carrier for which LBT is set.
  • the measurement unit 405 may output the LBT result (for example, the result of determining whether the channel state is free or busy) to the control unit 401.
  • the measurement unit 405 may measure, for example, the received power (for example, RSRP), received quality (for example, RSRQ, received SINR), downlink channel information (for example, CSI) of a received signal, and the like.
  • the measurement result may be output to the control unit 401.
  • the transmitting / receiving section 203 may transmit an uplink signal (for example, a PRACH, a PUCCH, a PUSCH, etc.). Specifically, the transmission / reception unit 203 transmits a plurality of frequency resources (for example, a plurality of RBs, a plurality of subcarriers, or a plurality of The uplink signal may be transmitted using an interlace composed of sub-RBs of the sub-RBs.
  • an uplink signal for example, a PRACH, a PUCCH, a PUSCH, etc.
  • a plurality of frequency resources for example, a plurality of RBs, a plurality of subcarriers, or a plurality of
  • the uplink signal may be transmitted using an interlace composed of sub-RBs of the sub-RBs.
  • the transmission / reception unit 203 may receive a downlink signal. Specifically, transmission / reception section 203 transmits a plurality of frequency resources (for example, a plurality of RBs, a plurality of subcarriers) arranged at predetermined frequency intervals within a predetermined bandwidth in a carrier on which listening is performed before transmission. Alternatively, a downlink signal may be received using an interlace configured by a plurality of sub RBs.
  • a frequency resources for example, a plurality of RBs, a plurality of subcarriers
  • the transmission / reception unit 203 may receive information (interlace unit information) on a frequency resource unit (interlace unit) constituting the interlace.
  • the transmission / reception unit 203 may receive configuration information (configuration information) of the uplink signal for each type of uplink signal (for example, PRACH, PUCCH, PUSCH, and the like).
  • control section 401 gives transmission signal generation section 402 and mapping section 403 an uplink signal on a carrier (for example, an unlicensed carrier) that performs listening before uplink transmission according to the LBT result obtained by measurement section 405. May be controlled.
  • a carrier for example, an unlicensed carrier
  • control unit 401 transmits a plurality of frequency resources (for example, a plurality of RBs, a plurality of subcarriers, Transmission of an uplink signal using an interlace composed of a plurality of sub RBs may be controlled.
  • the control unit 401 may control the predetermined interval at which the plurality of frequency resources configuring the interlace are arranged.
  • the control unit 401 may determine a frequency resource unit (interlace unit) forming an interlace in a carrier on which listening is performed before transmission.
  • a frequency resource unit interlace unit
  • the frequency resource unit may be a subcarrier.
  • the control unit 401 may determine a plurality of subcarriers at a predetermined interval that constitute the interlace based on the total number of subcarriers within a predetermined bandwidth. Further, the control unit 401 may determine the predetermined interval based on a total number of the subcarriers and a number of consecutive subcarriers determined based on the number of the plurality of subcarriers.
  • the control unit 401 may determine a frequency resource unit (interlace unit) constituting the interlace based on the received interlace unit information.
  • the control unit 401 may determine a different frequency resource unit (interlace unit) for each of a predetermined range of time regions or each of a predetermined range of frequency regions within the predetermined bandwidth.
  • the different frequency resource unit may be at least two of a subcarrier, a resource block, and a subset of the resource block.
  • the control unit 401 may control the transmission of the uplink signal based on the setting information of the uplink signal.
  • the setting information may be provided for each type of uplink signal (for example, PRACH, PUCCH, or PUSCH).
  • the control unit 401 may control transmission of uplink signals in different interlace units based on DCI (resource allocation indicated by) from the base station 10.
  • each functional block is realized by an arbitrary combination of at least one of hardware and software.
  • a method of implementing each functional block is not particularly limited. That is, each functional block may be realized using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated). , Wired, wireless, etc.), and may be implemented using these multiple devices.
  • the functional block may be implemented by combining one device or the plurality of devices with software.
  • the functions include judgment, determination, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block (configuration unit) that causes transmission to function may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
  • the realization method is not particularly limited.
  • the base station, the user terminal, and the like according to the present embodiment may function as a computer that performs processing of the wireless communication method according to the present disclosure.
  • FIG. 13 is a diagram illustrating an example of a hardware configuration of a base station and a user terminal according to one embodiment.
  • the above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. .
  • the term “apparatus” can be read as a circuit, a device, a unit, or the like.
  • the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices illustrated in the drawing, or may be configured to exclude some of the devices.
  • processor 1001 may be implemented by one or more chips.
  • the functions of the base station 10 and the user terminal 20 are performed, for example, by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002 so that the processor 1001 performs an arithmetic operation and communicates via the communication device 1004. And controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
  • predetermined software program
  • the processor 1001 performs an arithmetic operation and communicates via the communication device 1004.
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
  • CPU Central Processing Unit
  • the above-described baseband signal processing unit 104 (204), call processing unit 105, and the like may be realized by the processor 1001.
  • the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to these.
  • a program program code
  • a program that causes a computer to execute at least a part of the operation described in the above embodiment is used.
  • the control unit 401 of the user terminal 20 may be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks may be implemented similarly.
  • the memory 1002 is a computer-readable recording medium, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically EPROM), RAM (Random Access Memory), and other appropriate storage media. It may be constituted by one.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to the present embodiment.
  • the storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc) ROM, etc.), a digital versatile disc, At least one of a Blu-ray (registered trademark) disk, a removable disk, a hard disk drive, a smart card, a flash memory device (eg, a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. May be configured.
  • the storage 1003 may be called an auxiliary storage device.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). May be configured.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like may be realized by the communication device 1004.
  • the transmission / reception unit 103 may be mounted physically or logically separated between the transmission unit 103a and the reception unit 103b.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an external input.
  • the output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, an LED (Light Emitting Diode) lamp, and the like). Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • the devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using a different bus for each device.
  • the base station 10 and the user terminal 20 include hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include hardware, and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the channel and the symbol may be a signal (signaling).
  • the signal may be a message.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like according to an applied standard.
  • a component carrier (CC: Component Carrier) may be called a cell, a frequency carrier, a carrier frequency, or the like.
  • a radio frame may be configured by one or more periods (frames) in the time domain.
  • the one or more respective periods (frames) forming the radio frame may be referred to as a subframe.
  • a subframe may be configured by one or more slots in the time domain.
  • the subframe may be of a fixed length of time (eg, 1 ms) that does not depend on numerology.
  • the new melology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
  • Numerology includes, for example, subcarrier interval (SCS: SubCarrier @ Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission @ Time @ Interval), number of symbols per TTI, radio frame configuration, transmission and reception.
  • SCS SubCarrier @ Spacing
  • TTI Transmission @ Time @ Interval
  • TTI Transmission @ Time @ Interval
  • radio frame configuration transmission and reception.
  • At least one of a specific filtering process performed by the transceiver in the frequency domain and a specific windowing process performed by the transceiver in the time domain may be indicated.
  • the slot may be configured by one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain. Further, the slot may be a time unit based on numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • Slots may include multiple mini-slots. Each minislot may be constituted by one or more symbols in the time domain. Also, the mini-slot may be called a sub-slot. A minislot may be made up of a smaller number of symbols than slots.
  • a PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (PUSCH) mapping type A.
  • a PDSCH (or PUSCH) transmitted using a minislot may be referred to as a PDSCH (PUSCH) mapping type B.
  • Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals.
  • the radio frame, the subframe, the slot, the minislot, and the symbol may have different names corresponding to each. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be interchanged with each other.
  • one subframe may be called a transmission time interval (TTI: Transmission @ Time @ Interval)
  • TTI Transmission @ Time @ Interval
  • TTI Transmission Time interval
  • a plurality of consecutive subframes may be called a TTI
  • one slot or one minislot is called a TTI.
  • You may. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1 to 13 symbols), or a period longer than 1 ms. It may be.
  • the unit representing the TTI may be called a slot, a minislot, or the like instead of a subframe.
  • the TTI refers to, for example, a minimum time unit of scheduling in wireless communication.
  • the base station performs scheduling for allocating radio resources (frequency bandwidth, transmission power, and the like that can be used in each user terminal) to each user terminal in TTI units.
  • radio resources frequency bandwidth, transmission power, and the like that can be used in each user terminal
  • the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, a time section (for example, the number of symbols) in which a transport block, a code block, a codeword, and the like are actually mapped may be shorter than the TTI.
  • one slot or one minislot is called a TTI
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (mini-slot number) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE@Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, and the like.
  • a TTI shorter than the normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • a long TTI (for example, a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (for example, a shortened TTI, etc.) may be replaced with a TTI shorter than the long TTI and 1 ms
  • the TTI having the above-described TTI length may be replaced with the TTI.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers (subcarriers) in the frequency domain.
  • the number of subcarriers included in the RB may be the same irrespective of the numerology, and may be, for example, 12.
  • the number of subcarriers included in the RB may be determined based on numerology.
  • the RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI.
  • One TTI, one subframe, and the like may each be configured by one or a plurality of resource blocks.
  • one or more RBs include a physical resource block (PRB: Physical @ RB), a subcarrier group (SCG: Sub-Carrier @ Group), a resource element group (REG: Resource @ Element @ Group), a PRB pair, an RB pair, and the like. May be called.
  • PRB Physical @ RB
  • SCG Sub-Carrier @ Group
  • REG Resource @ Element @ Group
  • PRB pair an RB pair, and the like. May be called.
  • a resource block may be composed of one or more resource elements (RE: Resource @ Element).
  • RE Resource @ Element
  • one RE may be a radio resource area of one subcarrier and one symbol.
  • a bandwidth part (which may be referred to as a partial bandwidth or the like) may also represent a subset of consecutive common RBs (common @ resource @ blocks) for a certain numerology in a certain carrier. Good.
  • the common RB may be specified by an index of the RB based on the common reference point of the carrier.
  • a PRB may be defined by a BWP and numbered within the BWP.
  • $ BWP may include a BWP for UL (UL @ BWP) and a BWP for DL (DL @ BWP).
  • BWP for a UE, one or more BWPs may be configured in one carrier.
  • At least one of the configured BWPs may be active, and the UE does not have to assume to transmit and receive a given signal / channel outside the active BWP.
  • “cell”, “carrier”, and the like in the present disclosure may be replaced with “BWP”.
  • the structures of the above-described radio frame, subframe, slot, minislot, symbol, and the like are merely examples.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, included in an RB The configuration of the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP: Cyclic @ Prefix) length, and the like can be variously changed.
  • the information, parameters, and the like described in the present disclosure may be expressed using an absolute value, may be expressed using a relative value from a predetermined value, or may be expressed using another corresponding information. May be represented.
  • a radio resource may be indicated by a predetermined index.
  • Names used for parameters and the like in the present disclosure are not limited in any respect. Further, the formulas and the like using these parameters may be different from those explicitly disclosed in the present disclosure.
  • the various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements can be identified by any suitable name, so the various names assigned to these various channels and information elements Is not a limiting name in any way.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that can be referred to throughout the above description are not limited to voltages, currents, electromagnetic waves, magnetic or magnetic particles, optical or photons, or any of these. May be represented by a combination of
  • information, signals, and the like can be output from the upper layer to at least one of the lower layer and the lower layer to the upper layer.
  • Information, signals, etc. may be input / output via a plurality of network nodes.
  • Information and signals input and output may be stored in a specific place (for example, a memory) or may be managed using a management table. Information and signals that are input and output can be overwritten, updated, or added. The output information, signal, and the like may be deleted. The input information, signal, and the like may be transmitted to another device.
  • ⁇ Notification of information is not limited to the aspect / embodiment described in the present disclosure, and may be performed using another method.
  • the information is notified by physical layer signaling (for example, downlink control information (DCI: Downlink Control Information), uplink control information (UCI: Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, It may be implemented by broadcast information (master information block (MIB: Master Information Block), system information block (SIB: System Information Block), etc.), MAC (Medium Access Control) signaling), other signals, or a combination thereof.
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • the physical layer signaling may be called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
  • the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
  • the MAC signaling may be notified using, for example, a MAC control element (MAC @ CE (Control @ Element)).
  • the notification of the predetermined information is not limited to an explicit notification, and is implicit (for example, by not performing the notification of the predetermined information or by another information). May be performed).
  • the determination may be made by a value represented by 1 bit (0 or 1), or may be made by a boolean value represented by true or false. , May be performed by comparing numerical values (for example, comparison with a predetermined value).
  • software, instructions, information, and the like may be transmitted and received via a transmission medium.
  • a transmission medium For example, if the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), the website, When transmitted from a server or other remote source, at least one of these wired and / or wireless technologies is included within the definition of a transmission medium.
  • system and “network” as used in this disclosure may be used interchangeably.
  • precoding In the present disclosure, “precoding”, “precoder”, “weight (precoding weight)”, “quasi-co-location (QCL)”, “TCI state (Transmission Configuration Indication state)”, “spatial relation” (Spatial relation), “spatial domain filter”, “transmission power”, “phase rotation”, “antenna port”, “antenna port group”, “layer”, “number of layers”, “ Terms such as “rank,” “beam,” “beam width,” “beam angle,” “antenna,” “antenna element,” “panel,” etc., may be used interchangeably.
  • base station (BS: Base @ Station)”, “wireless base station”, “fixed station (fixed @ station)”, “NodeB”, “eNodeB (eNB)”, “gNodeB (gNB)”, “gNodeB (gNB)” "Access point (access @ point)”, “transmission point (TP: Transmission @ Point)”, “reception point (RP: Reception @ Point)”, “transmission / reception point (TRP: Transmission / Reception @ Point)”, “panel”, “cell” , “Sector”, “cell group”, “carrier”, “component carrier” and the like may be used interchangeably.
  • a base station may also be referred to as a macro cell, a small cell, a femto cell, a pico cell, or the like.
  • a base station can accommodate one or more (eg, three) cells. If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH: Communication services can also be provided by Remote Radio Head)).
  • a base station subsystem eg, a small indoor base station (RRH: Communication services can also be provided by Remote Radio Head).
  • RRH small indoor base station
  • the term “cell” or “sector” refers to part or all of the coverage area of at least one of a base station and a base station subsystem that provides communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • a mobile station is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal. , Handset, user agent, mobile client, client or some other suitable terminology.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
  • at least one of the base station and the mobile station may be a device mounted on the mobile unit, the mobile unit itself, or the like.
  • the moving object may be a vehicle (for example, a car, an airplane, or the like), may be an unmanned moving object (for example, a drone, an autonomous vehicle), or may be a robot (maned or unmanned). ).
  • at least one of the base station and the mobile station includes a device that does not necessarily move during a communication operation.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be replaced with a user terminal.
  • communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
  • each aspect / embodiment of the present disclosure may be applied.
  • the configuration may be such that the user terminal 20 has the function of the base station 10 described above.
  • words such as “up” and “down” may be read as words corresponding to communication between terminals (for example, “side”).
  • an uplink channel, a downlink channel, and the like may be replaced with a side channel.
  • a user terminal in the present disclosure may be replaced by a base station.
  • a configuration in which the base station 10 has the function of the user terminal 20 described above may be adopted.
  • the operation performed by the base station may be performed by an upper node (upper node) in some cases.
  • various operations performed for communication with a terminal include a base station, one or more network nodes other than the base station (eg, Obviously, it can be performed by MME (Mobility Management Entity), S-GW (Serving-Gateway) or the like, but not limited thereto, or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • Each aspect / embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching with execution.
  • the order of the processing procedure, sequence, flowchart, and the like of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction.
  • elements of various steps are presented in an exemplary order, and are not limited to the specific order presented.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • LTE-B Long Term Evolution-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile
  • 5G 5th generation mobile communication system
  • FRA FlutureATRadioRAccess
  • New-RAT Radio Access Technology
  • NR New Radio
  • NX New radio access
  • FX Fluture generation radio access
  • GSM registered trademark
  • CDMA2000 Ultra Mobile Broadband
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi (registered trademark)
  • IEEE 802.16 WiMAX (registered trademark)
  • IEEE 802 .20 UWB (Ultra-WideBand), Bluetooth (registered trademark)
  • a system using other appropriate wireless communication methods a next-generation system extended based on these, and the like.
  • a plurality of systems may be combined (for example, a combination of LTE or LTE-A and 5G) and applied.
  • any reference to elements using designations such as "first,” “second,” etc., as used in this disclosure, does not generally limit the quantity or order of those elements. These designations may be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not mean that only two elements can be employed or that the first element must precede the second element in any way.
  • determining means judging, calculating, computing, processing, deriving, investigating, searching (upping, searching, inquiry) ( For example, a search in a table, database, or another data structure), ascertaining, etc., may be regarded as "deciding".
  • determining includes receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), and access ( accessing) (e.g., accessing data in a memory) or the like.
  • judgment (decision) is regarded as “judgment (decision)” of resolving, selecting, selecting, establishing, comparing, and the like. Is also good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of any operation.
  • “judgment (decision)” may be read as “assuming”, “expecting”, “considering”, or the like.
  • the “maximum transmission power” described in the present disclosure may mean the maximum value of the transmission power, may mean the nominal maximum transmission power (the nominal UE maximum transmit power), or may refer to the rated maximum transmission power (the rated UE maximum transmit power).
  • connection refers to any direct or indirect connection or coupling between two or more elements. And may include the presence of one or more intermediate elements between two elements “connected” or “coupled” to each other.
  • the coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.
  • the radio frequency domain, microwave It can be considered to be “connected” or “coupled” to each other using electromagnetic energy having a wavelength in the region, light (both visible and invisible) regions, and the like.
  • the term “A and B are different” may mean that “A and B are different from each other”.
  • the term may mean that “A and B are different from C”.
  • Terms such as “separate”, “coupled” and the like may be interpreted similarly to "different”.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon un aspect de la présente invention, un terminal utilisateur comprend : une unité de transmission qui transmet un signal de liaison montante en utilisant un entrelacement dans une porteuse où une écoute est effectuée avant la transmission ; et une unité de commande qui détermine l'unité d'une ressource de fréquence constituant l'entrelacement dans une certaine largeur de bande de la porteuse.
PCT/JP2018/029837 2018-08-08 2018-08-08 Terminal utilisateur WO2020031308A1 (fr)

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CN112073353B (zh) * 2020-09-09 2023-07-04 浙江树人学院（浙江树人大学） 基于fpga的lte-u通信系统

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