WO2023008325A1 - Communication device, base station, and communication method - Google Patents

Communication device, base station, and communication method Download PDF

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Publication number
WO2023008325A1
WO2023008325A1 PCT/JP2022/028452 JP2022028452W WO2023008325A1 WO 2023008325 A1 WO2023008325 A1 WO 2023008325A1 JP 2022028452 W JP2022028452 W JP 2022028452W WO 2023008325 A1 WO2023008325 A1 WO 2023008325A1
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WIPO (PCT)
Prior art keywords
cell
transmission power
trp201
base station
communication
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PCT/JP2022/028452
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French (fr)
Japanese (ja)
Inventor
正幸 星野
秀明 ▲高▼橋
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株式会社デンソー
トヨタ自動車株式会社
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Publication of WO2023008325A1 publication Critical patent/WO2023008325A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present disclosure relates to communication devices, base stations, and communication methods used in mobile communication systems.
  • a first cell that is a serving cell and a second cell that belongs to the same frequency (intra frequency) as the first cell are configured in a communication device, and the communication device maintains the first cell as a serving cell, A model of performing data communication with the second cell is assumed (see Non-Patent Documents 1 to 3).
  • the second cell is a cell (cell having TRP with different PCI) configured by a TRP different from that of the first cell and having a physical cell identifier (PCI) different from that of the first cell.
  • PCI physical cell identifier
  • the communication device must perform transmission power control for each of the first and second cells, thereby making the uplink transmission power for each of the first and second cells different. It is thought that there is However, since the conventional uplink transmission power control is applied to the serving cell, there is a concern that the uplink transmission power for the second cell, which is not the serving cell, cannot be controlled appropriately.
  • the present disclosure is a communication device that can appropriately control the uplink transmission power for the second cell when the first cell, which is the serving cell, and the second cell belonging to the same frequency as the first cell are set.
  • An object is to provide a base station and a communication method.
  • a communication device is a device in which the first cell and the second cell are configured by a base station that manages a first cell, which is a serving cell, and a second cell belonging to the same frequency as the first cell. be.
  • the communication device includes a control unit that determines uplink transmission power based on a transmission power adjustment state that changes according to a transmission power control (TPC) command from the base station, and an uplink transmission power that is determined. and a communication unit that performs link transmission.
  • the control unit manages the transmission power adjustment state associated with the second cell independently of the transmission power adjustment state associated with the first cell.
  • a base station is a device that configures a first cell, which is a serving cell, and a second cell that belongs to the same frequency as the first cell in a communication device.
  • the base station communicates, in the first cell, association information that associates the identifier of the second cell with an identifier of a transmission power adjustment state that changes according to a transmission power control (TPC) command from the base station.
  • TPC transmission power control
  • a transmitting unit that transmits to a device; and a receiving unit that receives uplink transmission performed by the communication device with uplink transmission power determined based on the transmission power adjustment state associated with the second cell.
  • a communication method is a communication device in which the first cell and the second cell are configured by a base station that manages a first cell that is a serving cell and a second cell that belongs to the same frequency as the first cell. This is the method used in The communication method includes a step of managing a transmission power adjustment state associated with the second cell independently of a transmission power adjustment state associated with the first cell; and transmission power control from the base station ( determining uplink transmission power based on the transmission power adjustment state that changes according to a TPC) command; and performing uplink transmission with the determined uplink transmission power.
  • FIG. 1 is a diagram showing the configuration of a mobile communication system according to an embodiment
  • FIG. 1 is a diagram showing a configuration example of a protocol stack in a mobile communication system according to an embodiment
  • FIG. 1 is a diagram showing an assumed scenario in a mobile communication system according to an embodiment
  • FIG. 3 shows a basic procedure in an assumed scenario according to an embodiment
  • FIG. 4 illustrates PRACH transmit power control in a UE according to one embodiment
  • FIG. 4 is a diagram showing a first operation example of PRACH transmission power control in the case of CFRA
  • FIG. 10 is a diagram showing a second operation example of PRACH transmission power control in the case of CFRA
  • FIG. 12 is a diagram showing a third operation example of PRACH transmission power control in the case of CFRA
  • FIG. 4 is a diagram showing an operation example of PRACH transmission power control in the case of CBRA
  • FIG. 4 is a diagram illustrating uplink transmit power control in a UE according to one embodiment
  • FIG. 4 is a diagram showing a specific example of uplink transmission power control in a UE according to one embodiment
  • FIG. 4 is a diagram illustrating transmission power reduction processing in a UE according to one embodiment
  • FIG. 5 is a diagram showing a specific example of transmission power reduction processing in a UE according to one embodiment
  • the mobile communication system 1 is, for example, a system conforming to 3GPP Technical Specifications (TS).
  • TS Technical Specifications
  • a mobile communication system based on the 3GPP standard 5th Generation System (5GS), that is, NR (New Radio) will be described as an example.
  • the mobile communication system 1 has a network 10 and a communication device (User Equipment: UE) 100 that communicates with the network 10 .
  • the network 10 includes an NG-RAN (Next Generation Radio Access Network) 20, which is a 5G radio access network, and a 5GC (5G Core Network) 30, which is a 5G core network.
  • NG-RAN Next Generation Radio Access Network
  • 5G Core Network 5G Core Network
  • the UE 100 is a device used by a user.
  • the UE 100 is, for example, a portable device such as a mobile phone terminal such as a smart phone, a tablet terminal, a notebook PC, a communication module, or a communication card.
  • the UE 100 may be a vehicle (eg, car, train, etc.) or a device provided therein.
  • the UE 100 may be a transport body other than a vehicle (for example, a ship, an airplane, etc.) or a device provided thereon.
  • the UE 100 may be a sensor or a device attached thereto.
  • the UE 100 includes a mobile station, a mobile terminal, a mobile device, a mobile unit, a subscriber station, a subscriber terminal, a subscriber device, a subscriber unit, a wireless station, a wireless terminal, a wireless device, a wireless unit, a remote station, and a remote terminal. , remote device, or remote unit.
  • NG-RAN 20 includes multiple base stations 200 .
  • Each base station 200 manages at least one cell.
  • a cell constitutes the minimum unit of a communication area. For example, one cell belongs to one frequency (carrier frequency) and is configured by one component carrier.
  • the term “cell” may represent a radio communication resource and may also represent a communication target of UE 100 .
  • Each base station 200 can perform radio communication with the UE 100 residing in its own cell.
  • the base station 200 communicates with the UE 100 using the RAN protocol stack.
  • Base station 200 provides NR user plane and control plane protocol termination towards UE 100 and is connected to 5GC 30 via NG interface.
  • gNodeB gNodeB
  • the 5GC 30 includes a core network device 300.
  • the core network device 300 includes, for example, AMF (Access and Mobility Management Function) and/or UPF (User Plane Function).
  • AMF Access and Mobility Management Function
  • UPF User Plane Function
  • AMF performs mobility management of UE100.
  • UPF provides functions specialized for user plane processing.
  • the AMF and UPF are connected with the base station 200 via the NG interface.
  • the protocol of the radio section between the UE 100 and the base station 200 includes a physical (PHY) layer, a MAC (Medium Access Control) layer, an RLC (Radio Link Control) layer, a PDCP (Packet Data Convergence Protocol) layer, It has an RRC (Radio Resource Control) layer.
  • PHY physical
  • MAC Medium Access Control
  • RLC Radio Link Control
  • PDCP Packet Data Convergence Protocol
  • RRC Radio Resource Control
  • the PHY layer performs encoding/decoding, modulation/demodulation, antenna mapping/demapping, and resource mapping/demapping. Data and control information are transmitted between the PHY layer of the UE 100 and the PHY layer of the base station 200 via physical channels.
  • a physical channel consists of multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain.
  • One subframe consists of a plurality of OFDM symbols in the time domain.
  • a resource block is a resource allocation unit, and is composed of a plurality of OFDM symbols and a plurality of subcarriers.
  • a frame may consist of 10 ms and may include 10 subframes of 1 ms.
  • a subframe can include a number of slots corresponding to the subcarrier spacing.
  • the physical downlink control channel plays a central role, for example, for purposes such as downlink scheduling assignments, uplink scheduling grants, and transmission power control.
  • the UE 100 can use a narrower bandwidth than the system bandwidth (that is, the cell bandwidth).
  • the base station 200 configures the UE 100 with a bandwidth part (BWP) made up of consecutive PRBs.
  • UE 100 transmits and receives data and control signals on the active BWP.
  • BWP bandwidth part
  • Up to four BWPs can be set in the UE 100, for example.
  • Each BWP may have different subcarrier spacing and may overlap each other in frequency. If multiple BWPs are configured for the UE 100, the base station 200 can specify which BWP to activate through downlink control. This allows the base station 200 to dynamically adjust the UE bandwidth according to the amount of data traffic of the UE 100, etc., and reduce UE power consumption.
  • the base station 200 can configure up to 3 control resource sets (CORESET) for each of up to 4 BWPs on the serving cell.
  • CORESET is a radio resource for control information that the UE 100 should receive.
  • UE 100 may be configured with up to 12 CORESETs on the serving cell.
  • Each CORESET has an index from 0 to 11.
  • a CORESET consists of 6 resource blocks (PRBs) and 1, 2 or 3 consecutive OFDM symbols in the time domain.
  • the MAC layer performs data priority control, hybrid ARQ (HARQ) retransmission processing, random access procedures, and so on. Data and control information are transmitted between the MAC layer of the UE 100 and the MAC layer of the base station 200 via transport channels.
  • the MAC layer of base station 200 includes a scheduler. The scheduler determines uplink and downlink transport formats (transport block size, modulation and coding scheme (MCS)) and allocation resources to the UE 100 .
  • MCS modulation and coding scheme
  • the RLC layer uses the functions of the MAC layer and PHY layer to transmit data to the RLC layer on the receiving side. Data and control information are transmitted between the RLC layer of the UE 100 and the RLC layer of the base station 200 via logical channels.
  • the PDCP layer performs header compression/decompression and encryption/decryption.
  • An SDAP (Service Data Adaptation Protocol) layer may be provided as an upper layer of the PDCP layer.
  • the SDAP (Service Data Adaptation Protocol) layer performs mapping between an IP flow, which is the unit of QoS control performed by the core network, and a radio bearer, which is the unit of QoS control performed by the AS (Access Stratum).
  • the RRC layer controls logical channels, transport channels and physical channels according to radio bearer establishment, re-establishment and release.
  • RRC signaling for various settings is transmitted between the RRC layer of UE 100 and the RRC layer of base station 200 .
  • UE 100 When there is an RRC connection between the RRC of UE 100 and the RRC of base station 200, UE 100 is in the RRC connected state. If there is no RRC connection between the RRC of the UE 100 and the RRC of the base station 200, the UE 100 is in RRC idle state. When the RRC connection between the RRC of UE 100 and the RRC of base station 200 is suspended, UE 100 is in RRC inactive state.
  • the NAS layer located above the RRC layer performs session management and mobility management for UE100.
  • NAS signaling is transmitted between the NAS layer of the UE 100 and the NAS layer of the core network device 300 (AMF).
  • AMF core network device 300
  • the UE 100 has an application layer and the like in addition to the radio interface protocol.
  • the base station 200 has a TRP 201 # 1 , a TRP 201 # 2 , a DU (Distributed Unit) 202 and a CU (central unit) 203 .
  • FIG. 3 shows an example in which base station 200 is separated into DU202 and CU203, base station 200 may not be separated into DU202 and CU203.
  • the number of TRPs 201 in base station 200 is two is shown, the number of TRPs 201 in base station 200 may be three or more.
  • TRPs 201#1 and TRPs 201#2 are distributed and constitute different cells. Specifically, TRP 201#1 forms cell C1 and TRP 201#2 forms cell C2.
  • Cell C1 and cell C2 belong to the same frequency.
  • Cell C1 and cell C2 have different physical cell identifiers (PCI). That is, the cell C2 is a cell (cell having TRP with different PCI) configured by a TRP #2 different from the TRP 201 #1 corresponding to the cell C1 and having a PCI different from that of the cell C1.
  • FIG. 3 shows an example in which the coverage of cell C2 is within the coverage of cell C1, the coverage of cell C2 may at least partially overlap the coverage of cell C1.
  • the DU202 controls TRP201#1 and TRP201#2. In other words, TRP201#1 and TRP201#2 are under the same DU202.
  • the DU 202 is a unit that includes lower layers included in the protocol stack described above, such as the RLC layer, the MAC layer and the PHY layer.
  • DU202 is connected with CU203 via F1 interface which is a fronthaul interface.
  • the CU203 controls DU202.
  • the CU 203 is a unit including upper layers included in the protocol stack described above, such as the RRC layer, the SDAP layer and the PDCP layer.
  • the CU 203 is connected to the core network (5GC 30) via the NG interface, which is a backhaul interface.
  • the UE 100 is in the RRC connected state and performs wireless communication with the base station 200.
  • NR is capable of wideband transmission in a high frequency band such as a millimeter wave band. It has high beam gain.
  • Base station 200 and UE 100 establish a beam pair.
  • the UE 100 performs data communication with the serving cell C1 (TRP201#1). Specifically, the UE 100 performs data communication with the cell C1 using a beam corresponding to transmission configuration indicator (TCI) state #1.
  • UE 100 is configured with cell 2, which is a non-serving cell, in addition to cell C1.
  • an SSB SS/PBCH Block
  • the SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a PBCH (Physical Broadcast Channel), and a demodulation reference signal (DMRS).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH Physical Broadcast Channel
  • DMRS demodulation reference signal
  • an SSB may consist of four consecutive OFDM symbols in the time domain. Also, the SSB may consist of 240 consecutive subcarriers (ie, 20 resource blocks) in the frequency domain.
  • PBCH is a physical channel that carries a Master Information Block (MIB).
  • MIB Master Information Block
  • the UE 100 reports the beam measurement results for the cell C2 to the cell C1.
  • Base station 200 (DU 202) receives beam measurements from UE 100 in cell C1 and activates TCI state #2 corresponding to beams in cell C2 based on the beam measurements. Then, the UE 100 maintains the cell C1 as a serving cell and performs data communication with the cell C2 using radio resources set by the cell C1.
  • cell C1 which is a serving cell
  • cell C2 belonging to the same frequency intra-frequency as cell C1
  • UE 100 maintains cell C1 as a serving cell
  • NR supports TCI state setting, which is a higher layer setting for beamforming per CORESET.
  • TCI state setting is a higher layer setting for beamforming per CORESET.
  • UE 100 monitors a PDCCH search space associated with CORESET, UE 100 receives PDCCH on CORESET based on the TCI state settings configured for CORESET.
  • Beam information for PDCCH reception is implicitly recognized by the UE 100 by the QCL relationship between the downlink reference signal and the PDCCH demodulation reference signal (DMRS).
  • DMRS of PDCCH has a pseudo collocation relationship with downlink reference signals by QCL-TypeA and/or QCL-TypeD.
  • QCL-Type A corresponds to channel statistical properties observed at the UE 100 side, such as Doppler shift, Doppler spread, mean delay, delay spread.
  • QCL-TypeD corresponds to reception beam information on the UE 100 side.
  • the downlink reference signal and DMRS of PDCCH may be assumed that the downlink reference signal and DMRS of PDCCH have the same spatial reception parameters. If the PDCCH DMRS is in a pseudo-colocation relationship with the QCL-Type D downlink reference signal, the UE 100 can receive the PDCCH using the same spatial reception parameters used to receive the downlink reference signal in beamforming.
  • the base station 200 sets multiple TCI states for CORESET by RRC signaling.
  • Each TCI state includes parameters for downlink reference signal resources and QCL relationships between downlink reference signals and PDCCH DMRS ports for QCL-TypeA and QCL-TypeD.
  • UE 100 uses only one beam to receive one PDCCH. Therefore, if multiple TCI states are set for CORESET, the base station 200 activates one of the TCI states used for CORESET, for example using an activation command by MAC CE.
  • the UE 100 receives configuration information from the cell C1 (TRP201#1) by, for example, RRC signaling.
  • the setting information includes SSB settings used for beam measurement for cell C2 (TRP201#2) and settings necessary for using radio resources for data transmission/reception (including data transmission/reception with cell C2).
  • Configuration information may be transmitted from CU 203 to UE 100 via DU 202 and cell C1 (TRP 201 #1).
  • step S2 UE 100 performs beam measurement for cell C2 (TRP201#2) using the setting information (in particular, SSB setting) received in step S1 (step S2a), and sends a report including the measurement result to cell C1 (TRP201 #1) (step S2b).
  • DU 202 receives beam measurement results via cell C1 (TRP 201#1).
  • step S3 DU 202 sends an instruction to activate the TCI state associated with cell C2 (TRP201 #2) based on the beam measurement results received in step S2 via cell C1 (TRP201 #1) It transmits to UE100.
  • Such an activation indication is performed by layer 1 (PHY layer) and layer 2 (MAC layer, etc.) signaling.
  • the UE 100 activates the TCI state associated with the cell C2 (TRP201#2) in response to receiving the activation instruction from the cell C1. As a result, a beam pair is established between the UE 100 and the cell C2 (TRP201#2).
  • step S4 the UE 100 transmits and receives data to and from the cell C2 (TRP201#2) using the UE dedicated channel on the cell C2 (TRP201#2).
  • DU 202 transmits and receives data to and from UE 100 via cell C2 (TRP 201 #2).
  • the UE 100 is within the coverage of the cell C1 (TRP201#1) and receives the broadcast channel (BCCH) and paging channel (PCH), which are common channels, from the cell C1 (TRP201#1).
  • BCCH broadcast channel
  • PCH paging channel
  • the UE 100 can switch from cell C1 (TRP201 #1) to cell C2 (TRP201 #2) without depending on a switching instruction from a higher layer (in particular, the RRC layer).
  • Data communication can be switched from cell C1 (TRP201#1) to cell C2 (TRP201#2) by beam management in layer 1 (PHY layer) and layer 2 (MAC layer, etc.) without handover. That is, a cell for data communication can be realized by beam switching between layer 1 (PHY layer) and layer 2 (MAC layer, etc.).
  • the UE 100 may perform transmission power control on each of cell C1 (TRP201#1) and cell C2 (TRP201#2).
  • the UE 100 may perform random access (RA) to the cell C2 (TRP201#2) in order to adjust the timing of uplink transmission to the cell C2 (TRP201#2). Control is required.
  • RA random access
  • PRACH transmission power control for appropriately controlling the transmission power applied to such RA will be described.
  • PRACH is a physical channel for transmitting RA preambles.
  • Uplink transmissions include Sounding Reference Signal (SRS) transmissions, Physical Uplink Control Channel (PUCCH) transmissions, and Physical Uplink Shared Channel (PUSCH) transmissions.
  • SRS Sounding Reference Signal
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the SRS is an uplink reference signal and is used, for example, in the base station 200 to perform uplink channel estimation.
  • PUCCH is an uplink control channel and is a physical channel for transmitting uplink control information (UCI).
  • PUSCH is an uplink shared channel and is a physical channel for transmitting uplink data.
  • transmission power reduction processing is defined for the operation of communicating with a plurality of serving cells.
  • the UE 100 is based on the priority according to the type of uplink transmission and the priority according to the cell type, so that the total transmission power of uplink transmission is equal to or less than a predetermined maximum value. , allocate transmit power to each uplink transmission for each cell. Also in the above scenario, it is considered necessary for the UE 100 to perform transmission power reduction processing.
  • UE 100 (Configuration of communication device) A configuration of the UE 100 according to the embodiment will be described with reference to FIG. UE 100 includes communication unit 110 and control unit 120 .
  • the communication unit 110 performs wireless communication with the base station 200 by transmitting and receiving wireless signals to and from the base station 200 .
  • the communication unit 110 has at least one transmitter 111 and at least one receiver 112 .
  • the transmitter 111 and receiver 112 may be configured to include multiple antennas and RF circuits.
  • the antenna converts a signal into radio waves and radiates the radio waves into space. Also, the antenna receives radio waves in space and converts the radio waves into signals.
  • the RF circuitry performs analog processing of signals transmitted and received through the antenna.
  • the RF circuitry may include high frequency filters, amplifiers, modulators, low pass filters, and the like.
  • the control unit 120 performs various controls in the UE 100.
  • Control unit 120 controls communication with base station 200 via communication unit 110 .
  • the operations of the UE 100 described above and below may be operations under the control of the control unit 120 .
  • the control unit 120 may include at least one processor capable of executing a program and a memory that stores the program.
  • the processor may execute a program to operate the control unit 120 .
  • the control unit 120 may include a digital signal processor that performs digital processing of signals transmitted and received through the antenna and RF circuitry.
  • the digital processing includes processing of the protocol stack of the RAN. Note that the memory stores programs executed by the processor, parameters related to the programs, and data related to the programs.
  • the memory may include at least one of ROM (Read Only Memory), EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), RAM (Random Access Memory), and flash memory. All or part of the memory may be included within the processor.
  • the cell C1 ( TRP 201#1) and cell C2 (TRP 201#2) are set.
  • the receiving unit 112 receives reference signal information indicating the downlink reference signal transmitted by the cell C2 (TRP201#2) from the cell C1 (TRP201#1).
  • Control section 120 estimates the path loss with cell C2 (TRP201#2) based on the downlink reference signal received from cell C2 (TRP201#2) using the reference signal information, and estimates the RA for cell C2 (TRP201#2). based on the path loss.
  • Transmitting section 111 transmits the RA preamble to cell C2 (TRP201#2) with the determined transmission power. This makes it possible to appropriately control the transmission power applied to RA for cell C2 (TRP201#2).
  • control unit 120 controls uplink transmission power (for example, SRS transmission power, PUCCH transmission power, or PUSCH transmission power).
  • Control section 120 manages the transmission power adjustment state associated with cell C2 (TRP201#2) independently of the transmission power adjustment state associated with cell C1 (TRP201#1).
  • the transmitter 111 performs uplink transmission with the determined uplink transmission power. This makes it possible to appropriately control the uplink transmission power for cell C2 (TRP201#2).
  • the control unit 120 sets the total transmission power of uplink transmission to a predetermined maximum based on the transmission type priority according to the type of uplink transmission and the cell type priority according to the cell type.
  • a transmission power reduction process is performed to allocate transmission power to each uplink transmission for each cell so as to be equal to or less than the value.
  • the control unit 120 determines the cell type priority applied to the cell C2 (TRP201#2) based on the cell type priority applied to the cell C1 (TRP201#1). For example, the control unit 120 makes the cell type priority applied to the cell C2 (TRP201#2) equal to the cell type priority applied to the cell C1 (TRP201#1).
  • the configuration of the base station 200 according to the embodiment will be described with reference to FIG.
  • the base station 200 has a plurality of TRPs 201 (TRP 201 # 1 and TRP 201 # 2 in the example of FIG. 6), a communication section 210 , a network interface 220 and a control section 230 .
  • Each TRP 201 includes multiple antennas and is configured to enable beamforming.
  • TRP 201 may also be referred to as a panel or antenna panel.
  • the antenna converts a signal into radio waves and radiates the radio waves into space. Also, the antenna receives radio waves in space and converts the radio waves into signals.
  • Each TRP 201 is arranged in a distributed manner and constitutes a cell.
  • the communication unit 210 receives radio signals from the UE 100 and transmits radio signals to the UE 100.
  • the communication unit 210 has at least one transmitter 211 and at least one receiver 212 .
  • the transmitting section 211 and the receiving section 212 may be configured including an RF circuit.
  • the RF circuitry performs analog processing of signals transmitted and received through the antenna.
  • the RF circuitry may include high frequency filters, amplifiers, modulators, low pass filters, and the like.
  • the network interface 220 transmits and receives signals to and from the network.
  • the network interface 220 receives signals from adjacent base stations connected via an Xn interface, which is an interface between base stations, and transmits signals to adjacent base stations. Also, the network interface 220 receives signals from the core network device 300 connected via the NG interface, for example, and transmits signals to the core network device 300 .
  • the control unit 230 performs various controls in the base station 200.
  • the control unit 230 controls communication with the UE 100 via the communication unit 210, for example.
  • the control unit 230 controls communication with nodes (for example, adjacent base stations, core network device 300) via the network interface 220, for example.
  • the operations of the base station 200 described above and below may be operations under the control of the control unit 230 .
  • the control unit 230 may include at least one processor capable of executing programs and a memory storing the programs.
  • the processor may execute a program to operate the controller 230 .
  • Control unit 230 may include a digital signal processor that performs digital processing of signals transmitted and received through the antenna and RF circuitry.
  • the digital processing includes processing of the protocol stack of the RAN.
  • the memory stores programs executed by the processor, parameters related to the programs, and data related to the programs. All or part of the memory may be included within the processor.
  • the communication unit 210 may be provided in the DU202, and the control unit 230 may be provided in the DU202 and/or the CU203.
  • the base station 200 configures the UE 100 with cell C1 (TRP201#1), which is a serving cell, and cell C2 (TRP201#2) belonging to the same frequency as cell C1 (TRP201#1). .
  • the transmitting section 211 transmits reference signal information indicating the downlink reference signal transmitted by the cell C2 (TRP201#2) to the UE 100 in the cell C1 (TRP201#1).
  • Receiving section 212 transmits the RA preamble transmitted from UE 100 with transmission power determined based on the downlink reference signal received from cell C2 (TRP201#2) using the reference signal information to cell C2 (TRP201#2). receive at
  • the transmission unit 211 provides association information that associates the identifier of the cell C2 (TRP201#2) with the identifier of the transmission power adjustment state that changes according to the transmission power control (TPC) command from the base station 200. is transmitted to the UE 100 in the cell C1 (TRP201#1).
  • the receiving unit 212 receives uplink transmission performed by the UE 100 with uplink transmission power determined based on the transmission power adjustment state associated with cell C2 (TRP201#2).
  • PRACH transmission power control (1) Operation Flow PRACH transmission power control in the UE 100 according to one embodiment will be described with reference to FIG.
  • the UE 100 may execute the operation flow shown in FIG. 7 between steps S2 and S4 in the procedure shown in FIG. 4, particularly between steps S3 and S4.
  • step S3 shown in FIG. 4 the UE 100 receives an instruction to activate the TCI state associated with the cell C2 (TRP201#2) from the cell C1 (TRP201#1), and then transfers the data to the cell C2 (
  • the operation flow shown in FIG. 7 is executed to transmit and receive with TRP 201#2).
  • step S11 the UE 100 (receiving section 112) receives reference signal information indicating the downlink reference signal transmitted by the cell C2 (TRP201#2) from the cell C1 (TRP201#1).
  • step S12 the UE 100 (control unit 230) receives the downlink reference signal from cell C2 (TRP 201 #2) using the reference signal information received in step S11, and based on the received downlink reference signal, the cell C2. Estimate the path loss with (TRP 201#2).
  • step S13 the UE 100 (control unit 230) determines the transmission power applied to RA for cell C2 (TRP201#2) based on the path loss estimated in step S12.
  • RA is contention-free random access (CFRA) or contention-based random access (CBRA).
  • step S14 the UE 100 (transmitting section 111) transmits the RA preamble to cell C2 (TRP201#2) with the transmission power determined in step S13.
  • step S101 the base station 200 (control unit 230) allocates a dedicated RA preamble to be used for RA for cell C2 (TRP201#2) to UE100.
  • a dedicated RA preamble is assigned exclusively to the UE 100 from among the RA preamble group prepared for the cell C2 (TRP201#2), and is an RA preamble that does not conflict with other UEs 100 in RA for the cell C2 (TRP201#2). be.
  • Base station 200 (transmitting section 211) transmits preamble information indicating a dedicated RA preamble allocated to UE 100 to UE 100 in cell C1 (TRP 201 #1).
  • UE 100 (receiving section 112) receives the preamble information.
  • base station 200 (transmitting section 211) may transmit preamble information indicating the dedicated RA preamble allocated to UE 100 in cell C1 (TRP 201 #1) to UE 100 in step S1 of the procedure in FIG.
  • the base station 200 determines to cause the UE 100 to perform RA for cell C2 (TRP201#2).
  • Base station 200 transmits to UE 100 in cell C1 (TRP201#1) a PDCCH command instructing execution of RA for cell C2 (TRP201#2).
  • the base station 200 transmits DCI of downlink control information (DCI) format 1_0 as a PDCCH command to the UE 100 on the PDCCH of the cell C1 (TRP201#1).
  • UE 100 receives the PDCCH command.
  • the PDCCH command for causing UE 100 to perform RA for cell C2 may be transmitted to UE 100 in a manner different from the PDCCH command for causing UE 100 to perform RA for cell C1 (TRP 201 #1).
  • the PDCCH command contains the index of the dedicated RA preamble to be used for RA for cell C2 (TRP201#2).
  • the dedicated RA preamble is the RA preamble assigned to the UE 100 in step S101.
  • the PDCCH command includes reference signal information (SS/PBCH index) indicating the SSB transmitted by cell C2 (TRP201#2).
  • step S103 UE 100 (receiving unit 112) receives from cell C2 (TRP201#2) based on the reference signal information (SS/PBCH index) included in the PDCCH command received from cell C1 (TRP201#1) in step S102. Receive SSB.
  • step S104 UE 100 (control unit 120) estimates the path loss with cell C2 (TRP201#2) based on the SSB received from cell C2 (TRP201#2) in step S103. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CFRA for cell C2 (TRP 201 #2). For example, UE 100 (control unit 120) measures the reception power of SSB received from cell C2 (TRP 201 #2) in step S103, and estimates the path loss by subtracting the reception power from the transmission power of SSB.
  • UE 100 (control unit 120) specifies the SSB transmission power by SSB transmission power information (ss-PBCH-BlockPower) transmitted in system information, for example, from cell C1 (TRP201 #1) or cell C2 (TRP201 #2). can.
  • SSB transmission power information SSB transmission power information
  • SSB transmission power information SSB transmission power information
  • SSB transmission power information SSB transmission power information
  • SSB transmission power information for example, from cell C1 (TRP201 #1) or cell C2 (TRP201 #2).
  • CSI-RS may estimate path loss using CSI-RS.
  • the transmission power of CSI-RS it may be specified using preset SSB transmission power information (ss-PBCH-BlockPower) and a predetermined offset value (powerControlOffsetSS), CSI-RS and / or SSB may be obtained as RSRP filtered in higher layers.
  • a PDCCH command may include CSI-RS information as reference signal information.
  • step S105 the UE 100 (control unit 120) determines the transmission power to be applied to CFRA for cell C2 (TRP201#2), specifically, the transmission power of PRACH, based on the path loss estimated in step S104. For example, the UE 100 (control unit 120) determines the sum of the target reception power of the RA preamble and the path loss as the transmission power of the PRACH.
  • step S106 the UE 100 (transmitting section 111) transmits a dedicated RA preamble on the PRACH to cell C2 (TRP201#2) with the transmission power determined in step S105.
  • Base station 200 receives the dedicated RA preamble in cell C2 (TRP201#2).
  • RA preamble transmission is referred to as Msg1 in the RA procedure.
  • Base station 200 (control section 230) generates an RA response in response to receiving the RA preamble.
  • the base station 200 transmits the RA response to the UE 100 on PDSCH in cell C1 (TRP201#1).
  • the base station 200 may transmit the RA response to the UE 100 on the PDSCH in cell C2 (TRP201#2).
  • UE 100 receives an RA response from cell C1 (TRP201#1) or cell C2 (TRP201#2).
  • RA Response transmission is referred to as Msg2 in the RA procedure.
  • the RA response contains timing alignment information and uplink grant.
  • the timing alignment information is information for adjusting the transmission timing from the UE 100 to the cell C2 (TRP201#2).
  • the uplink grant includes information indicating PUSCH resources allocated to UE 100 and a transmission power control command (TPC command) for adjusting PUSCH transmission power of UE 100 .
  • TPC command transmission power control command
  • UE 100 transmitting section 2111 performs PUSCH transmission with the transmission power adjusted by the TPC command using the allocated PUSCH resource.
  • the PDCCH command includes reference signal information (SS/PBCH index) indicating the SSB of cell C2 (TRP201#2).
  • UE 100 receives SSB from cell C2 (TRP201#2) based on the reference signal information (SS/PBCH index) included in the PDCCH command, and detects path loss with cell C2 (TRP201#2) based on the received SSB. estimate. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CFRA for cell C2 (TRP 201 #2).
  • the base station 200 transmits beam measurement setting information for setting a beam measurement reference signal used for beam measurement for cell C2 (TRP 201 #2) to UE 100 in cell C1 (TRP 201 #1). do.
  • the beam measurement setting information includes reference signal information indicating the SSB or channel state information reference signal (CSI-RS) transmitted by cell C2 (TRP201#2).
  • the UE 100 receives beam measurement setting information including reference signal information. Note that the base station 200 (transmitting section 211) may transmit beam measurement setting information including reference signal information to the UE 100 in the cell C1 (TRP 201#1) in step S1 of the procedure in FIG.
  • the base station 200 assigns to the UE 100 a dedicated RA preamble to be used for RA for cell C2 (TRP201#2).
  • Base station 200 transmits preamble information indicating a dedicated RA preamble allocated to UE 100 to UE 100 in cell C1 (TRP 201 #1).
  • UE 100 receives the preamble information.
  • Base station 200 transmitting section 211) may transmit preamble information indicating the dedicated RA preamble allocated to UE 100 in cell C1 (TRP 201 #1) to UE 100 in step S1 of the procedure in FIG.
  • step S113 the base station 200 (control unit 230) determines to cause the UE 100 to perform RA for cell C2 (TRP201#2).
  • Base station 200 transmits to UE 100 in cell C1 (TRP201#1) a PDCCH command instructing execution of RA for cell C2 (TRP201#2).
  • step S114 the UE 100 (receiving unit 112) receives downlink reference signals from the cell C2 (TRP201#2) based on the reference signal information included in the beam measurement configuration information received from the cell C1 (TRP201#1) in step S111. (SSB or CSI-RS).
  • step S115 UE 100 (control unit 120), based on the downlink reference signal (SSB or CSI-RS) received from cell C2 (TRP201 #2) in step S114, path loss with cell C2 (TRP201 #2) Estimate.
  • SSB downlink reference signal
  • TRP201 #2 path loss with cell C2 (TRP201 #2) Estimate.
  • This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CFRA for cell C2 (TRP 201 #2).
  • UE 100 (control unit 120) measures the reception power of SSB received from cell C2 (TRP 201 #2) in step S114, and estimates the path loss by subtracting the reception power from the transmission power of SSB.
  • UE 100 (control unit 120) specifies the SSB transmission power by SSB transmission power information (ss-PBCH-BlockPower) transmitted in system information, for example, from cell C1 (TRP201 #1) or cell C2 (TRP201 #2). can.
  • SSB transmission power information SSB transmission power information
  • SSB transmission power information SSB transmission power information
  • SSB transmission power information SSB transmission power information
  • SSB transmission power information for example, from cell C1 (TRP201 #1) or cell C2 (TRP201 #2).
  • CSI-RS may estimate path loss using CSI-RS.
  • the transmission power of CSI-RS it may be specified using preset SSB transmission power information (ss-PBCH-BlockPower) and a predetermined offset value (powerControlOffsetSS), CSI-RS and / or SSB may be obtained as RSRP filtered in higher layers.
  • step S116 the UE 100 (control unit 120) determines the transmission power to be applied to CFRA for cell C2 (TRP201#2), specifically, the transmission power of PRACH, based on the path loss estimated in step S115. For example, the UE 100 (control unit 120) determines the sum of the target reception power of the RA preamble and the path loss as the transmission power of the PRACH.
  • steps S117 and S118 are the same as in the first operation example described above.
  • the beam measurement setting information for setting the beam measurement reference signal used for beam measurement for cell C2 is the downlink transmitted by cell C2 (TRP201#2). It includes reference signal information indicating a reference signal (SSB or CSI-RS).
  • UE 100 receives the downlink reference signal from cell C2 (TRP 201 #2) based on the reference signal information included in the beam measurement configuration information, and communicates with cell C2 (TRP 201 #2) based on the received downlink reference signal. Estimate path loss. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CFRA for cell C2 (TRP 201 #2).
  • the base station 200 transmits TCI state setting information for setting one or more TCI states for receiving PDCCH from cell C2 (TRP201#2) to cell C1 (TRP201#1). is transmitted to the UE 100 in.
  • the TCI state setting information includes reference signal information indicating a downlink reference signal (SSB or CSI-RS) transmitted by cell C2 (TRP201#2).
  • SSB downlink reference signal
  • each TCI state includes reference signal information consisting of parameters related to downlink reference signal resources, downlink reference signals related to QCL-Type A and QCL-Type D, and QCL relationships between DMRS ports of PDCCH.
  • UE 100 receives TCI state setting information including reference signal information.
  • the base station 200 may transmit TCI state setting information including reference signal information to the UE 100 in cell C1 (TRP201#1) in step S1 of the procedure in FIG.
  • step S122 the base station 200 (control unit 230) assigns to the UE 100 a dedicated RA preamble to be used for RA for cell C2 (TRP201#2).
  • Base station 200 transmits preamble information indicating a dedicated RA preamble allocated to UE 100 to UE 100 in cell C1 (TRP 201 #1).
  • UE 100 receives the preamble information.
  • step S123 the base station 200 (control unit 230) determines to cause the UE 100 to perform RA for cell C2 (TRP201#2).
  • Base station 200 transmits to UE 100 in cell C1 (TRP201#1) and/or cell C2 (TRP201#2) a PDCCH command instructing execution of RA for cell C2 (TRP201#2).
  • step S124 UE 100 (receiving unit 112) receives cell C1 (TRP201#1) and/or cell C2 (TRP201#2) in step S121 based on the reference signal information included in the TCI state setting information.
  • TRP 201#2 receives a downlink reference signal (SSB or CSI-RS).
  • SSB or CSI-RS downlink reference signal
  • the UE 100 (receiving unit 112) receives the downlink reference signal (SSB or CSI-RS) associated with the TCI state activated in step S3 of the procedure in FIG.
  • step S125 UE 100 (control unit 120), based on the downlink reference signal (SSB or CSI-RS) received from cell C2 (TRP201 #2) in step S124, path loss with cell C2 (TRP201 #2) Estimate.
  • SSB downlink reference signal
  • TRP201 #2 path loss with cell C2 (TRP201 #2) Estimate.
  • This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CFRA for cell C2 (TRP 201 #2).
  • UE 100 (control unit 120) measures the reception power of SSB received from cell C2 (TRP 201 #2) in step S124, and estimates the path loss by subtracting the reception power from the transmission power of SSB.
  • UE 100 (control unit 120) specifies the SSB transmission power by SSB transmission power information (ss-PBCH-BlockPower) transmitted in system information, for example, from cell C1 (TRP201 #1) or cell C2 (TRP201 #2). can.
  • SSB transmission power information SSB transmission power information
  • SSB transmission power information SSB transmission power information
  • SSB transmission power information SSB transmission power information
  • SSB transmission power information for example, from cell C1 (TRP201 #1) or cell C2 (TRP201 #2).
  • CSI-RS may estimate path loss using CSI-RS.
  • the transmission power of CSI-RS it may be specified using preset SSB transmission power information (ss-PBCH-BlockPower) and a predetermined offset value (powerControlOffsetSS), CSI-RS and / or SSB may be obtained as RSRP filtered in higher layers.
  • step S126 the UE 100 (control unit 120) determines the transmission power to be applied to CFRA for cell C2 (TRP201#2), specifically, the transmission power of PRACH, based on the path loss estimated in step S125. For example, the UE 100 (control unit 120) determines the sum of the target reception power of the RA preamble and the path loss as the transmission power of the PRACH.
  • steps S127 and S128 are the same as in the first operation example described above.
  • the TCI state setting information for setting the TCI state for receiving the PDCCH from cell C2 is the downlink reference transmitted by cell C2 (TRP201#2). It contains reference signal information indicating the signal (SSB or CSI-RS).
  • UE 100 receives the downlink reference signal from cell C2 (TRP201#2) based on the reference signal information included in the TCI state setting information, and communicates with cell C2 (TRP201#2) based on the received downlink reference signal. Estimate path loss. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CFRA for cell C2 (TRP 201 #2).
  • step S201 the base station 200 performs the operation of step S1 of the procedure in FIG. Specifically, the base station 200 (transmitting section 211) transmits configuration information regarding the cell C2 (TRP201#2) to the UE 100 in the cell C1 (TRP201#1) by RRC signaling, for example.
  • the setting information includes SSB settings used for beam measurement for cell C2 (TRP201#2) and settings necessary for using radio resources for data transmission/reception (including data transmission/reception with cell C2).
  • the base station 200 (transmitting section 211) transmits RA configuration information regarding one or more RA resources (CBRA preamble group) that can be used for CBRA for cell C2 (TRP201#2) to cell C1 (TRP201#1). ) to the UE 100.
  • CBRA preamble group RA configuration information regarding one or more RA resources
  • Such a CBRA preamble is an RA preamble that can compete with other UEs 100.
  • the RA configuration information (each RA resource) includes reference signal information indicating the SSB of cell C2 (TRP201#2) as a downlink reference signal.
  • UE 100 (receiving unit 112) receives the setting information.
  • the UE 100 determines to perform CBRA to cell C2 (TRP201#2).
  • the factor that determines the execution of CBRA may be a PDCCH command from base station 200 (transmitter 211), or may be initiated by a higher layer command such as MAC or RRC.
  • the PDCCH command for performing CBRA here may be identified by notifying a predetermined preamble index (for example, the value of RA-PreambleIndex included in the PDCCH command is provided as 0b000000).
  • UE 100 (control unit 120) randomly selects an RA preamble from a group of CBRA preambles that can be used for CBRA for cell C2 (TRP201#2) based on the RA setting information received in step S201.
  • UE 100 (control unit 120) identifies the SSB associated with the selected RA preamble. That is, UE 100 (control section 120) selects a CBRA preamble from RA resources notified from base station 200, and identifies an SSB associated with the selected CBRA preamble.
  • step S203 the UE 100 (receiving unit 112) receives the SSB identified in step S202 from cell C2 (TRP201#2).
  • step S204 UE 100 (control unit 120) estimates the path loss with cell C2 (TRP201#2) based on the SSB received from cell C2 (TRP201#2) in step S203. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CBRA for cell C2 (TRP 201 #2). For example, UE 100 (control unit 120) measures the reception power of SSB received from cell C2 (TRP 201 #2) in step S203, and estimates the path loss by subtracting the reception power from the transmission power of SSB.
  • UE 100 (control unit 120) specifies the SSB transmission power by SSB transmission power information (ss-PBCH-BlockPower) transmitted in system information, for example, from cell C1 (TRP201 #1) or cell C2 (TRP201 #2). can.
  • SSB transmission power information SSB transmission power information
  • SSB transmission power information SSB transmission power information
  • SSB transmission power information SSB transmission power information
  • SSB transmission power information for example, from cell C1 (TRP201 #1) or cell C2 (TRP201 #2).
  • CSI-RS may estimate path loss using CSI-RS.
  • the transmission power of CSI-RS it may be specified using preset SSB transmission power information (ss-PBCH-BlockPower) and a predetermined offset value (powerControlOffsetSS), CSI-RS and / or SSB may be obtained as RSRP filtered in higher layers.
  • step S205 the UE 100 (control unit 120) determines the transmission power applied to CBRA for cell C2 (TRP201#2), specifically, the transmission power of PRACH, based on the path loss estimated in step S204. For example, the UE 100 (control unit 120) determines the sum of the target reception power of the RA preamble and the path loss as the transmission power of the PRACH.
  • step S206 the UE 100 (transmitting section 111) transmits the CBRA preamble on the PRACH to cell C2 (TRP201#2) with the transmission power determined in step S205.
  • Base station 200 receives the CBRA preamble in cell C2 (TRP201#2).
  • Base station 200 (control section 230) generates an RA response in response to receiving the RA preamble.
  • the base station 200 transmits the RA response to the UE 100 on PDSCH in cell C1 (TRP201#1).
  • the base station 200 may transmit the RA response to the UE 100 on the PDSCH in cell C2 (TRP201#2).
  • UE 100 receives an RA response from cell C1 (TRP201#1) or cell C2 (TRP201#2).
  • the RA response includes an RA preamble identifier, timing alignment information, uplink grant, and temporary C-RNTI.
  • the UE 100 determines RA success upon receiving an RA response including the same RA preamble identifier as the RA preamble of Msg1.
  • the timing alignment information is information for adjusting the transmission timing from the UE 100 to the cell C2 (TRP201#2).
  • the uplink grant includes information indicating PUSCH resources allocated to UE 100 and a transmission power control command (TPC command) for adjusting PUSCH transmission power of UE 100 .
  • TPC command transmission power control command
  • UE 100 transmitting section 211) performs PUSCH transmission with the transmission power adjusted by the TPC command using the allocated PUSCH resource.
  • the RA configuration information includes one or more RA resources (CBRA preamble group) that can be used for CBRA for cell C2 (TRP201#2), and each RA resource is a cell It includes reference signal information indicating the SSB of C2 (TRP201#2).
  • UE 100 receives SSB from cell C2 (TRP 201 #2) based on the reference signal information included in the RA configuration information, and estimates the path loss with cell C2 (TRP 201 #2) based on the received SSB. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CBRA for cell C2 (TRP 201 #2).
  • the UE 100 may determine the transmission power of the SRS as the uplink transmission power.
  • UE 100 may determine the transmission power of PUCCH as the uplink transmission power.
  • the UE 100 may determine the transmission power of PUSCH as the uplink transmission power.
  • the UE 100 may receive, from the cell C1 (TRP201#1), association information that associates the identifier of the cell C2 (TRP201#2) with the identifier of the transmission power adjustment state.
  • the transmission power adjustment state is a variable that changes according to the TPC command from the base station 200, and is used in the uplink transmission power calculation formula. This allows the base station 200 to set the transmission power adjustment state for cell C2 (TRP201#2). For example, when the transmission power adjustment state obtained by accumulating and calculating the correction value obtained from the TPC command is applied to the transmission power (which may be referred to as TPC accumulation), the relative Specify a value (up or down).
  • the transmit power adjustment state may be increased according to an increase value specified by the TPC command and decreased according to a decrease value specified by the TPC command.
  • one correction value received immediately before is applied to the transmission power as a transmission power adjustment state without accumulating and calculating the correction values obtained from the TPC commands (this may be referred to as TPC absolute).
  • the TPC command may include, for example, the TPC command of PUSCH in the DCI of the uplink scheduling grant, or the PUCCH for transmitting uplink control information including HARQ-ACK for downlink data in the DCI of the downlink scheduling assignment.
  • the TPC command may include a TPC command for
  • the TPC command may be notified using a non-scheduling DCI that is not used for scheduling, and is notified using a DCI (eg, DCI format 2_2) used for transmitting TPC commands for PUSCH and PUSCH.
  • DCI for example, DCI format 2_3 used to transmit a group of TPC commands for SRS transmission to one or more UEs 100 may be used for notification.
  • the association information may be transmitted and set from the base station 200 to the UE 100 in step S1 of the procedure in FIG.
  • the UE 100 (receiving unit 112) includes configuration information used for beam measurement for cell C2 (TRP201 #2), configuration information related to radio resources for data communication with cell C2 (TRP201 #2), is received from the cell C1 (TRP201#1), and association information that associates the identifier of the cell C2 (TRP201#2) with the identifier of the transmission power adjustment state may be received from the cell C1 (TRP201#1).
  • UE 100 manages the transmission power adjustment state associated with cell C2 (TRP201#2) independently of the transmission power adjustment state associated with cell C1 (TRP201#1). do. For example, UE 100 (control unit 120) changes the transmission power adjustment state associated with cell C2 (TRP201#2) in response to receiving a TPC command for cell C2 (TRP201#2) from base station 200. Update. Further, UE 100 (control unit 120) changes the transmission power adjustment state associated with cell C1 (TRP201 #1) in response to receiving the TPC command for cell C1 (TRP201 #1) from base station 200. You may update.
  • the UE 100 determines uplink transmission power based on the transmission power adjustment state. For example, UE 100 (control section 120) determines uplink transmission power for cell C2 (TRP201#2) based on the transmission power adjustment state associated with cell C2 (TRP201#2). Also, the UE 100 (control section 120) may determine the uplink transmission power for the cell C1 (TRP201#1) based on the transmission power adjustment state associated with the cell C1 (TRP201#1).
  • step S24 the UE 100 (transmitting unit 111) performs uplink transmission with the uplink transmission power determined in step S23.
  • UE 100 transmitting section 111 performs uplink transmission to cell C2 (TRP201#2) with uplink transmission power determined for cell C2 (TRP201#2).
  • the UE 100 may perform uplink transmission to the cell C1 (TRP201#1) with the determined uplink transmission power for the cell C1 (TRP201#1).
  • UE 100 manages the transmission power adjustment state associated with cell C2 (TRP201 #2), which is a non-serving cell, independently of the transmission power adjustment state associated with cell C1 (TRP201 #1). . This makes it possible to appropriately determine the uplink transmission power for cell C2 (TRP201#2).
  • UE 100 sets SRS transmission power P SRS,b,f,c , PUCCH transmission power P PUCCH,b,f,c , and PUSCH transmission power P PUSCH,b,f,c as follows: Determined by a formula (see 3GPP TS38.213).
  • j is a parameter set configuration (parameter set config.)
  • q s " and “q d” are reference signal resource identifiers (RS resource)
  • q s " is a p0-PUCCH identifier (p0-PUCCH id)
  • "l” means the identifier of the transmission power adjustment state.
  • the base station 200 may notify and configure the UE 100 of association information that associates "1" as the identifier "l” of the transmission power adjustment state with the cell C2 (TRP 201 #2).
  • the uplink transmission power P'i for cell C2 may be determined in association with cell C1 (TRP201#1).
  • "c" representing a serving cell may be shared between cell C1 (TRP 201#1) and cell C2 (TRP 201#2).
  • UE 100 (control unit 120) further based on the path loss (PL b,f,c ) estimated using the reference signal resource associated with cell C2 (TRP201#2) for cell C2 (TRP201#2) Uplink transmit power may be determined.
  • the pathloss (PL b,f,c ) may be the pathloss estimated by the PRACH transmission power control described above.
  • UE 100 (receiving unit 112), in step S21 described above, receives the association information that associates the identifier of cell C2 (TRP201#2) with the identifier of the reference signal resource (q d ) from cell C1 (TRP201#1). may The UE 100 (control unit 120) may identify the reference signal resource of the cell C2 (TRP201#2) and estimate the path loss based on the association information.
  • UE 100 determines uplink transmission power for cell C2 (TRP201#2) further based on the power control parameter set configuration (parameter set config.) associated with cell C2 (TRP201#2).
  • Transmission power reduction processing Transmission power reduction processing in the UE 100 according to one embodiment will be described with reference to FIG. 14 .
  • step S31 the UE 100 (control unit 120) determines in advance the total transmission power of each channel determined by the method described above, that is, the total transmission power of uplink transmission in a certain transmission opportunity (i). It is determined whether or not it is less than or equal to the maximum value.
  • the predetermined maximum value is a legal maximum value, and may be a value specified in the technical specifications of 3GPP (eg, TS38.101).
  • step S31 When the total transmission power of uplink transmission is equal to or less than the maximum value (step S31: YES), transmission power reduction processing is not performed, and UE 100 (transmitting unit 111) performs uplink transmission of each channel in a certain transmission opportunity (i). (step S35).
  • step S32 the UE 100 (control unit 120) determines that the uplink transmission in the transmission opportunity (i) is cell C2, which is a non-serving cell. It is determined whether or not uplink transmission for (TRP201#2) is included. If the uplink transmission in transmission opportunity (i) does not include uplink transmission for cell C2 (TRP201#2) (step S32: NO), operation proceeds to step S34.
  • uplink transmission in transmission opportunity (i) includes uplink transmission to cell C2 (TRP201#2) (step S32: YES), in step S33, UE 100 (control unit 120) controls cell C1 (TRP201#1).
  • the cell type priority applied to cell C2 (TRP 201#2) is determined based on the cell type priority applied to .
  • the UE 100 (control unit 120) may make the cell type priority applied to the cell C2 (TRP201#2) equal to the cell type priority applied to the cell C1 (TRP201#1).
  • step S34 the UE 100 (control unit 120) performs transmission power reduction processing for transmission opportunity (i). Specifically, the UE 100 (control unit 120) determines in advance the total transmission power of uplink transmission based on the transmission type priority according to the type of uplink transmission and the cell type priority according to the cell type. Allocate transmit power to each uplink transmission for each cell so that it is less than or equal to the specified maximum value.
  • TRP201#2 uplink transmission for cell C2
  • TRP201#1 the same priority as the cell type priority applied to cell C1
  • TRP201#2 the same priority as the cell type priority applied to cell C1 (TRP201#1) is given to cell C2 (TRP201#2).
  • TRP201#1 may perform uplink transmission to cell C1 (TRP201#1) and uplink transmission to cell C2 (TRP201#2) at different timings, so this is applied to cell C1 (TRP201#1). There is no problem in giving cell C2 (TRP201#2) the same priority as the cell type priority to be used.
  • step S35 the UE 100 (transmitting unit 111) performs uplink transmission for transmission opportunity (i).
  • the highest priority is given to PRACH transmission in the primary cell (PCell), the next highest priority is given to PUCCH transmission and PUSCH transmission, and the lowest priority is given to SRS transmission or PRACH transmission in cells other than the primary cell. Given. Also, in the case of the same priority and carrier aggregation, a higher priority is given to the primary cell than to the secondary cell.
  • the operation sequences (and operation flows) in the above-described embodiments do not necessarily have to be executed in chronological order according to the order described in the flow diagrams or sequence diagrams. For example, the steps in the operations may be performed out of order or in parallel with the order illustrated in the flow diagrams or sequence diagrams. Also, some steps in the operation may be omitted and additional steps may be added to the process. Further, the operation sequences (and operation flows) in the above-described embodiments may be implemented independently, or two or more operation sequences (and operation flows) may be combined and implemented. For example, some steps of one operation flow may be added to another operation flow, or some steps of one operation flow may be replaced with some steps of another operation flow.
  • the mobile communication system 1 based on NR has been described as an example.
  • the mobile communication system 1 may be a TS-compliant system of either LTE or another generation system (eg, 6th generation) of the 3GPP standard.
  • Base station 200 may be an eNB that provides E-UTRA user plane and control plane protocol termination towards UE 100 in LTE.
  • the mobile communication system 1 may be a system conforming to a TS of a standard other than the 3GPP standard.
  • the base station 200 may be an IAB (Integrated Access and Backhaul) donor or an IAB node.
  • IAB Integrated Access and Backhaul
  • a program that causes a computer to execute each process performed by the UE 100 or the base station 200 may be provided.
  • the program may be recorded on a computer readable medium.
  • a computer readable medium allows the installation of the program on the computer.
  • the computer-readable medium on which the program is recorded may be a non-transitory recording medium.
  • the non-transitory recording medium is not particularly limited, but may be, for example, a recording medium such as CD-ROM or DVD-ROM.
  • circuits that execute each process performed by the UE 100 or the base station 200 may be integrated, and at least a part of the UE 100 or the base station 200 may be configured as a semiconductor integrated circuit (chipset, SoC).
  • “transmit” may mean performing at least one layer of processing in the protocol stack used for transmission, or physically transmitting the signal wirelessly or by wire. may mean sending to Alternatively, “transmitting” may mean a combination of performing the at least one layer of processing and physically transmitting the signal wirelessly or by wire.
  • “receive” may mean performing processing of at least one layer in the protocol stack used for reception, or physically receiving a signal wirelessly or by wire. may mean that Alternatively, “receiving” may mean a combination of performing the at least one layer of processing and physically receiving the signal wirelessly or by wire.
  • “obtain/acquire” may mean obtaining information among stored information, and may mean obtaining information among information received from other nodes.
  • the first cell (C1) and the second cell (C2) belonging to the same frequency as the serving cell (C1) and the first cell (C1) are managed by the base station (200) that manages the first cell (C1) and the second cell (
  • a communication device (100) in which C2) is set a control unit (120) that determines uplink transmission power based on a transmission power adjustment state that changes according to a transmission power control (TPC) command from the base station (200);
  • a communication unit (110) that performs uplink transmission with the determined uplink transmission power,
  • the control unit (120) manages the transmission power adjustment state associated with the second cell (C2) independently of the transmission power adjustment state associated with the first cell (C1).
  • control unit (120) determines the uplink transmission power for the second cell (C2) based on the transmission power adjustment state associated with the second cell (C2).
  • a communication device (100) According to appendix 1, the control unit (120) determines the uplink transmission power for the second cell (C2) based on the transmission power adjustment state associated with the second cell (C2).
  • the communication unit (110) receives, from the first cell (C1), association information that associates the identifier of the second cell (C2) with the identifier of the transmission power adjustment state,
  • the control unit (120) converts the transmission power adjustment state associated with the second cell (C2) to the transmission power associated with the first cell (C1) based on the association information.
  • the communication device (100) according to appendix 1 or 2, wherein the adjustment state is managed independently.
  • the control unit (120) determines the uplink transmission power for the second cell (C2) further based on the path loss calculated using the reference signal resource associated with the second cell (C2).
  • a communication device (100) according to appendix 2 or 3.
  • the control unit (120) determines the uplink transmission power for the second cell (C2) further based on a power control parameter set setting associated with the second cell (C2).
  • a communication device (100) according to any of the preceding claims.
  • Appendix 7 The communication device according to appendix 6, wherein the communication unit (110) receives association information that associates the identifier of the second cell (C2) with the identifier of the power control parameter set configuration from the first cell (C1). (100).
  • the communication unit (110) transmits setting information used for beam measurement for the second cell (C2) and setting information related to radio resources for data communication with the second cell (C2) to the first cell. received from (C1), The communication device (100) according to appendix 3, 5, or 7, wherein the communication unit (110) receives the setting information and the association information.
  • Appendix 11 The communication device (100) according to any one of appendices 1 to 8, wherein the control unit (120) determines transmission power of a physical uplink shared channel (PUSCH) as the uplink transmission power.
  • PUSCH physical uplink shared channel
  • the second cell (C2) is composed of a transmit/receive point (TRP) of the base station (200) and has a physical cell identifier (PCI) different from that of the first cell (C1).
  • TRP transmit/receive point
  • PCI physical cell identifier
  • the second cell (C2) is a non-serving cell;
  • the communication unit (110) performs data communication with the second cell (C2) while maintaining the first cell (C1) as the serving cell. ).
  • a base station (200) that sets a first cell (C1) that is a serving cell and a second cell (C2) that belongs to the same frequency as the first cell (C1) in a communication device (100),
  • the first cell (C1) is associated with the identifier of the second cell (C2) and the identifier of the transmission power adjustment state that changes according to the transmission power control (TPC) command from the base station (200).
  • a transmission unit (211) for transmitting to the communication device (100); a receiving unit (212) for receiving uplink transmission performed by the communication device (100) with uplink transmission power determined based on the transmission power adjustment state associated with the second cell (C2);
  • a base station (200) A base station (200).
  • the first cell (C1) and the second cell (C2) belonging to the same frequency as the serving cell (C1) and the first cell (C1) are managed by the base station (200) that manages the first cell (C1) and the second cell (
  • TPC transmission power control

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Abstract

A communication device (100), for which a first cell (C1) and a second cell (C2) are set by a base station (200) that manages the first cell (C1) as a serving cell and the second cell (C2) belonging to the same frequency as the first cell (C1), manages a transmission power adjustment state associated with the second cell (C2) independently from a transmission power adjustment state associated with the first cell (C1), determines an uplink transmission power on the basis of a transmission power adjustment state that changes in accordance with a transmission power control (TPC) command from the base station (200), and performs uplink transmission with the determined uplink transmission power.

Description

通信装置、基地局、及び通信方法Communication device, base station, and communication method 関連出願への相互参照Cross-references to related applications
　本出願は、２０２１年７月２９日に出願された特許出願番号２０２１－１２４７９２号に基づくものであって、その優先権の利益を主張するものであり、その特許出願のすべての内容が、参照により本明細書に組み入れられる。 This application is based on and claims the benefit of priority from patent application number 2021-124792, filed July 29, 2021, the entire contents of which are incorporated by reference. incorporated herein by.
　本開示は、移動通信システムで用いる通信装置、基地局、及び通信方法に関する。 The present disclosure relates to communication devices, base stations, and communication methods used in mobile communication systems.
　移動通信システムの標準化プロジェクトである３ＧＰＰ（登録商標。以下同じ）（３ｒｄ　Ｇｅｎｅｒａｔｉｏｎ　Ｐａｒｔｎｅｒｓｈｉｐ　Ｐｒｏｊｅｃｔ）において、ＭＩＭＯ（ｍｕｌｔｉ－ｉｎｐｕｔ　ｍｕｌｔｉ－ｏｕｔｐｕｔ）の拡張として、複数送受信ポイント（ＴＲＰ：Ｔｒａｎｓｍｉｓｓｉｏｎ／Ｒｅｃｅｐｔｉｏｎ　Ｐｏｉｎｔ）伝送の導入が検討されている。 In the 3GPP (registered trademark; hereinafter the same) (3rd Generation Partnership Project), which is a standardization project for mobile communication systems, as an extension of MIMO (multi-input multi-output), multiple transmission/reception point (TRP: Transmission/Reception Point) transmission Introduction is being considered.
　複数ＴＲＰ伝送のシナリオにおいて、サービングセルである第１セル及び当該第１セルと同じ周波数（イントラ周波数）に属する第２セルが通信装置に設定され、通信装置が第１セルをサービングセルとして維持しつつ、第２セルとのデータ通信を行うモデルが想定されている（非特許文献１乃至３参照）。ここで、第２セルは、第１セルとは異なるＴＲＰにより構成され、且つ物理セル識別子（ＰＣＩ）が第１セルとは異なるセル（ｃｅｌｌ　ｈａｖｉｎｇ　ＴＲＰ　ｗｉｔｈ　ｄｉｆｆｅｒｅｎｔ　ＰＣＩ）である。 In a multi-TRP transmission scenario, a first cell that is a serving cell and a second cell that belongs to the same frequency (intra frequency) as the first cell are configured in a communication device, and the communication device maintains the first cell as a serving cell, A model of performing data communication with the second cell is assumed (see Non-Patent Documents 1 to 3). Here, the second cell is a cell (cell having TRP with different PCI) configured by a TRP different from that of the first cell and having a physical cell identifier (PCI) different from that of the first cell.
　上述の複数ＴＲＰ伝送シナリオにおいて、通信装置は、第１セル及び第２セルのそれぞれに対して送信電力制御を行うことにより、第１セル及び第２セルのそれぞれに対する上りリンク送信電力を異ならせる必要があると考えられる。しかしながら、従来の上りリンク送信電力制御はサービングセルに対して適用されるため、サービングセルではない第２セルに対する上りリンク送信電力を適切に制御できない懸念がある。 In the multiple TRP transmission scenario described above, the communication device must perform transmission power control for each of the first and second cells, thereby making the uplink transmission power for each of the first and second cells different. It is thought that there is However, since the conventional uplink transmission power control is applied to the serving cell, there is a concern that the uplink transmission power for the second cell, which is not the serving cell, cannot be controlled appropriately.
　そこで、本開示は、サービングセルである第１セル及び当該第１セルと同じ周波数に属する第２セルが設定される場合において、第２セルに対する上りリンク送信電力を適切に制御可能とする通信装置、基地局、及び通信方法を提供することを目的とする。 Therefore, the present disclosure is a communication device that can appropriately control the uplink transmission power for the second cell when the first cell, which is the serving cell, and the second cell belonging to the same frequency as the first cell are set, An object is to provide a base station and a communication method.
　第１の態様に係る通信装置は、サービングセルである第１セル及び前記第１セルと同じ周波数に属する第２セルを管理する基地局によって前記第１セル及び前記第２セルが設定される装置である。前記通信装置は、前記基地局からの送信電力制御（ＴＰＣ）コマンドに応じて変化する送信電力調整状態に基づいて上りリンク送信電力を決定する制御部と、前記決定された上りリンク送信電力で上りリンク送信を行う通信部と、を備える。前記制御部は、前記第２セルと対応付けられた前記送信電力調整状態を、前記第１セルと対応付けられた前記送信電力調整状態と独立に管理する。 A communication device according to a first aspect is a device in which the first cell and the second cell are configured by a base station that manages a first cell, which is a serving cell, and a second cell belonging to the same frequency as the first cell. be. The communication device includes a control unit that determines uplink transmission power based on a transmission power adjustment state that changes according to a transmission power control (TPC) command from the base station, and an uplink transmission power that is determined. and a communication unit that performs link transmission. The control unit manages the transmission power adjustment state associated with the second cell independently of the transmission power adjustment state associated with the first cell.
　第２の態様に係る基地局は、サービングセルである第１セル及び前記第１セルと同じ周波数に属する第２セルを通信装置に設定する装置である。前記基地局は、前記第２セルの識別子と、前記基地局からの送信電力制御（ＴＰＣ）コマンドに応じて変化する送信電力調整状態の識別子とを対応付ける対応付け情報を前記第１セルにおいて前記通信装置に送信する送信部と、前記第２セルと対応付けられた前記送信電力調整状態に基づいて決定された上りリンク送信電力で前記通信装置により行われる上りリンク送信を受信する受信部と、を備える。 A base station according to a second aspect is a device that configures a first cell, which is a serving cell, and a second cell that belongs to the same frequency as the first cell in a communication device. The base station communicates, in the first cell, association information that associates the identifier of the second cell with an identifier of a transmission power adjustment state that changes according to a transmission power control (TPC) command from the base station. a transmitting unit that transmits to a device; and a receiving unit that receives uplink transmission performed by the communication device with uplink transmission power determined based on the transmission power adjustment state associated with the second cell. Prepare.
　第３の態様に係る通信方法は、サービングセルである第１セル及び前記第１セルと同じ周波数に属する第２セルを管理する基地局によって前記第１セル及び前記第２セルが設定される通信装置で用いる方法である。前記通信方法は、前記第２セルと対応付けられた送信電力調整状態を、前記第１セルと対応付けられた送信電力調整状態と独立に管理するステップと、前記基地局からの送信電力制御（ＴＰＣ）コマンドに応じて変化する前記送信電力調整状態に基づいて上りリンク送信電力を決定するステップと、前記決定された上りリンク送信電力で上りリンク送信を行うステップと、を備える。 A communication method according to a third aspect is a communication device in which the first cell and the second cell are configured by a base station that manages a first cell that is a serving cell and a second cell that belongs to the same frequency as the first cell. This is the method used in The communication method includes a step of managing a transmission power adjustment state associated with the second cell independently of a transmission power adjustment state associated with the first cell; and transmission power control from the base station ( determining uplink transmission power based on the transmission power adjustment state that changes according to a TPC) command; and performing uplink transmission with the determined uplink transmission power.
実施形態に係る移動通信システムの構成を示す図である。1 is a diagram showing the configuration of a mobile communication system according to an embodiment; FIG. 実施形態に係る移動通信システムにおけるプロトコルスタックの構成例を示す図である。1 is a diagram showing a configuration example of a protocol stack in a mobile communication system according to an embodiment; FIG. 実施形態に係る移動通信システムにおける想定シナリオを示す図である。1 is a diagram showing an assumed scenario in a mobile communication system according to an embodiment; FIG. 実施形態に係る想定シナリオにおける基本的なプロシージャを示す図である。FIG. 3 shows a basic procedure in an assumed scenario according to an embodiment; 実施形態に係るＵＥの構成を示す図である。It is a figure which shows the structure of UE which concerns on embodiment. 実施形態に係る基地局の構成を示す図である。It is a figure which shows the structure of the base station which concerns on embodiment. 一実施形態に係るＵＥにおけるＰＲＡＣＨ送信電力制御を示す図である。FIG. 4 illustrates PRACH transmit power control in a UE according to one embodiment; ＣＦＲＡの場合におけるＰＲＡＣＨ送信電力制御の第１動作例を示す図である。FIG. 4 is a diagram showing a first operation example of PRACH transmission power control in the case of CFRA; ＣＦＲＡの場合におけるＰＲＡＣＨ送信電力制御の第２動作例を示す図である。FIG. 10 is a diagram showing a second operation example of PRACH transmission power control in the case of CFRA; ＣＦＲＡの場合におけるＰＲＡＣＨ送信電力制御の第３動作例を示す図である。FIG. 12 is a diagram showing a third operation example of PRACH transmission power control in the case of CFRA; ＣＢＲＡの場合におけるＰＲＡＣＨ送信電力制御の動作例を示す図である。FIG. 4 is a diagram showing an operation example of PRACH transmission power control in the case of CBRA; 一実施形態に係るＵＥにおける上りリンク送信電力制御を示す図である。FIG. 4 is a diagram illustrating uplink transmit power control in a UE according to one embodiment; 一実施形態に係るＵＥにおける上りリンク送信電力制御の具体例を示す図である。FIG. 4 is a diagram showing a specific example of uplink transmission power control in a UE according to one embodiment; 一実施形態に係るＵＥにおける送信電力低減処理を示す図である。FIG. 4 is a diagram illustrating transmission power reduction processing in a UE according to one embodiment; 一実施形態に係るＵＥにおける送信電力低減処理の具体例を示す図である。FIG. 5 is a diagram showing a specific example of transmission power reduction processing in a UE according to one embodiment;
　図面を参照しながら、実施形態に係る移動通信システムについて説明する。図面の記載において、同一又は類似の部分には同一又は類似の符号を付している。 A mobile communication system according to an embodiment will be described with reference to the drawings. In the description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.
　（移動通信システムの構成）
　図１を参照して、実施形態に係る移動通信システム１の構成について説明する。移動通信システム１は、例えば、３ＧＰＰの技術仕様（Ｔｅｃｈｎｉｃａｌ　Ｓｐｅｃｉｆｉｃａｔｉｏｎ：ＴＳ）に準拠したシステムである。以下において、移動通信システム１として、３ＧＰＰ規格の第５世代システム（５ｔｈ　Ｇｅｎｅｒａｔｉｏｎ　Ｓｙｓｔｅｍ：５ＧＳ）、すなわち、ＮＲ（Ｎｅｗ　Ｒａｄｉｏ）に基づく移動通信システムを例に挙げて説明する。 (Configuration of mobile communication system)
A configuration of a mobile communication system 1 according to an embodiment will be described with reference to FIG. The mobile communication system 1 is, for example, a system conforming to 3GPP Technical Specifications (TS). Hereinafter, as the mobile communication system 1, a mobile communication system based on the 3GPP standard 5th Generation System (5GS), that is, NR (New Radio) will be described as an example.
　移動通信システム１は、ネットワーク１０と、ネットワーク１０と通信する通信装置（Ｕｓｅｒ　Ｅｑｕｉｐｍｅｎｔ：ＵＥ）１００とを有する。ネットワーク１０は、５Ｇの無線アクセスネットワークであるＮＧ－ＲＡＮ（Ｎｅｘｔ　Ｇｅｎｅｒａｔｉｏｎ　Ｒａｄｉｏ　Ａｃｃｅｓｓ　Ｎｅｔｗｏｒｋ）２０と、５Ｇのコアネットワークである５ＧＣ（５Ｇ　Ｃｏｒｅ　Ｎｅｔｗｏｒｋ）３０とを含む。 The mobile communication system 1 has a network 10 and a communication device (User Equipment: UE) 100 that communicates with the network 10 . The network 10 includes an NG-RAN (Next Generation Radio Access Network) 20, which is a 5G radio access network, and a 5GC (5G Core Network) 30, which is a 5G core network.
　ＵＥ１００は、ユーザにより利用される装置である。ＵＥ１００は、例えば、スマートフォンなどの携帯電話端末、タブレット端末、ノートＰＣ、通信モジュール、又は通信カードなどの移動可能な装置である。ＵＥ１００は、車両（例えば、車、電車など）又はこれに設けられる装置であってよい。ＵＥ１００は、車両以外の輸送機体（例えば、船、飛行機など）又はこれに設けられる装置であってよい。ＵＥ１００は、センサ又はこれに設けられる装置であってよい。なお、ＵＥ１００は、移動局、移動端末、移動装置、移動ユニット、加入者局、加入者端末、加入者装置、加入者ユニット、ワイヤレス局、ワイヤレス端末、ワイヤレス装置、ワイヤレスユニット、リモート局、リモート端末、リモート装置、又はリモートユニット等の別の名称で呼ばれてもよい。 　UE 100 is a device used by a user. The UE 100 is, for example, a portable device such as a mobile phone terminal such as a smart phone, a tablet terminal, a notebook PC, a communication module, or a communication card. The UE 100 may be a vehicle (eg, car, train, etc.) or a device provided therein. The UE 100 may be a transport body other than a vehicle (for example, a ship, an airplane, etc.) or a device provided thereon. The UE 100 may be a sensor or a device attached thereto. Note that the UE 100 includes a mobile station, a mobile terminal, a mobile device, a mobile unit, a subscriber station, a subscriber terminal, a subscriber device, a subscriber unit, a wireless station, a wireless terminal, a wireless device, a wireless unit, a remote station, and a remote terminal. , remote device, or remote unit.
　ＮＧ－ＲＡＮ２０は、複数の基地局２００を含む。各基地局２００は、少なくとも１つのセルを管理する。セルは、通信エリアの最小単位を構成する。例えば、１つのセルは、１つの周波数（キャリア周波数）に属し、１つのコンポーネントキャリアにより構成される。用語「セル」は、無線通信リソースを表すことがあり、ＵＥ１００の通信対象を表すこともある。各基地局２００は、自セルに在圏するＵＥ１００との無線通信を行うことができる。基地局２００は、ＲＡＮのプロトコルスタックを使用してＵＥ１００と通信する。基地局２００は、ＵＥ１００へ向けたＮＲユーザプレーン及び制御プレーンプロトコル終端を提供し、ＮＧインターフェイスを介して５ＧＣ３０に接続される。このようなＮＲの基地局２００は、ｇＮｏｄｅＢ（ｇＮＢ）と称されることがある。 NG-RAN 20 includes multiple base stations 200 . Each base station 200 manages at least one cell. A cell constitutes the minimum unit of a communication area. For example, one cell belongs to one frequency (carrier frequency) and is configured by one component carrier. The term “cell” may represent a radio communication resource and may also represent a communication target of UE 100 . Each base station 200 can perform radio communication with the UE 100 residing in its own cell. The base station 200 communicates with the UE 100 using the RAN protocol stack. Base station 200 provides NR user plane and control plane protocol termination towards UE 100 and is connected to 5GC 30 via NG interface. Such an NR base station 200 is sometimes referred to as a gNodeB (gNB).
　５ＧＣ３０は、コアネットワーク装置３００を含む。コアネットワーク装置３００は、例えば、ＡＭＦ（Ａｃｃｅｓｓ　ａｎｄ　Ｍｏｂｉｌｉｔｙ　Ｍａｎａｇｅｍｅｎｔ　Ｆｕｎｃｔｉｏｎ）及び／又はＵＰＦ（Ｕｓｅｒ　Ｐｌａｎｅ　Ｆｕｎｃｔｉｏｎ）を含む。ＡＭＦは、ＵＥ１００のモビリティ管理を行う。ＵＰＦは、ユーザプレーン処理に特化した機能を提供する。ＡＭＦ及びＵＰＦは、ＮＧインターフェイスを介して基地局２００と接続される。 The 5GC 30 includes a core network device 300. The core network device 300 includes, for example, AMF (Access and Mobility Management Function) and/or UPF (User Plane Function). AMF performs mobility management of UE100. UPF provides functions specialized for user plane processing. The AMF and UPF are connected with the base station 200 via the NG interface.
　図２を参照して、実施形態に係る移動通信システム１におけるプロトコルスタックの構成例について説明する。 A configuration example of a protocol stack in the mobile communication system 1 according to the embodiment will be described with reference to FIG.
　ＵＥ１００と基地局２００との間の無線区間のプロトコルは、物理（ＰＨＹ）レイヤと、ＭＡＣ（Ｍｅｄｉｕｍ　Ａｃｃｅｓｓ　Ｃｏｎｔｒｏｌ）レイヤと、ＲＬＣ（Ｒａｄｉｏ　Ｌｉｎｋ　Ｃｏｎｔｒｏｌ）レイヤと、ＰＤＣＰ（Ｐａｃｋｅｔ　Ｄａｔａ　Ｃｏｎｖｅｒｇｅｎｃｅ　Ｐｒｏｔｏｃｏｌ）レイヤと、ＲＲＣ（Ｒａｄｉｏ　Ｒｅｓｏｕｒｃｅ　Ｃｏｎｔｒｏｌ）レイヤとを有する。 The protocol of the radio section between the UE 100 and the base station 200 includes a physical (PHY) layer, a MAC (Medium Access Control) layer, an RLC (Radio Link Control) layer, a PDCP (Packet Data Convergence Protocol) layer, It has an RRC (Radio Resource Control) layer.
　ＰＨＹレイヤは、符号化・復号、変調・復調、アンテナマッピング・デマッピング、及びリソースマッピング・デマッピングを行う。ＵＥ１００のＰＨＹレイヤと基地局２００のＰＨＹレイヤとの間では、物理チャネルを介してデータ及び制御情報が伝送される。 The PHY layer performs encoding/decoding, modulation/demodulation, antenna mapping/demapping, and resource mapping/demapping. Data and control information are transmitted between the PHY layer of the UE 100 and the PHY layer of the base station 200 via physical channels.
　物理チャネルは、時間領域における複数のＯＦＤＭシンボルと周波数領域における複数のサブキャリアとで構成される。１つのサブフレームは、時間領域で複数のＯＦＤＭシンボルで構成される。リソースブロックは、リソース割当単位であり、複数のＯＦＤＭシンボルと複数のサブキャリアとで構成される。フレームは、１０ｍｓで構成されることができ、１ｍｓで構成された１０個のサブフレームを含むことができる。サブフレーム内には、サブキャリア間隔に応じた数のスロットが含まれることができる。 A physical channel consists of multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. One subframe consists of a plurality of OFDM symbols in the time domain. A resource block is a resource allocation unit, and is composed of a plurality of OFDM symbols and a plurality of subcarriers. A frame may consist of 10 ms and may include 10 subframes of 1 ms. A subframe can include a number of slots corresponding to the subcarrier spacing.
　物理チャネルの中で、物理下りリンク制御チャネル（ＰＤＣＣＨ）は、例えば、下りリンクスケジューリング割り当て、上りリンクスケジューリンググラント、及び送信電力制御等の目的で中心的な役割を果たす。 Among physical channels, the physical downlink control channel (PDCCH) plays a central role, for example, for purposes such as downlink scheduling assignments, uplink scheduling grants, and transmission power control.
　ＮＲでは、ＵＥ１００は、システム帯域幅（すなわち、セルの帯域幅）よりも狭い帯域幅を使用できる。基地局２００は、連続するＰＲＢからなる帯域幅部分（ＢＷＰ）をＵＥ１００に設定する。ＵＥ１００は、アクティブなＢＷＰにおいてデータ及び制御信号を送受信する。ＵＥ１００には、例えば、最大４つのＢＷＰが設定可能である。各ＢＷＰは、異なるサブキャリア間隔を有していてもよいし、周波数が相互に重複していてもよい。ＵＥ１００に対して複数のＢＷＰが設定されている場合、基地局２００は、ダウンリンクにおける制御によって、どのＢＷＰをアクティブ化するかを指定できる。これにより、基地局２００は、ＵＥ１００のデータトラフィックの量等に応じてＵＥ帯域幅を動的に調整でき、ＵＥ電力消費を減少させ得る。 In NR, the UE 100 can use a narrower bandwidth than the system bandwidth (that is, the cell bandwidth). The base station 200 configures the UE 100 with a bandwidth part (BWP) made up of consecutive PRBs. UE 100 transmits and receives data and control signals on the active BWP. Up to four BWPs can be set in the UE 100, for example. Each BWP may have different subcarrier spacing and may overlap each other in frequency. If multiple BWPs are configured for the UE 100, the base station 200 can specify which BWP to activate through downlink control. This allows the base station 200 to dynamically adjust the UE bandwidth according to the amount of data traffic of the UE 100, etc., and reduce UE power consumption.
　基地局２００は、例えば、サービングセル上の最大４つのＢＷＰのそれぞれに最大３つの制御リソースセット（ＣＯＲＥＳＥＴ：ｃｏｎｔｒｏｌ　ｒｅｓｏｕｒｃｅ　ｓｅｔ）を設定できる。ＣＯＲＥＳＥＴは、ＵＥ１００が受信すべき制御情報のための無線リソースである。ＵＥ１００には、サービングセル上で最大１２個のＣＯＲＥＳＥＴが設定され得る。各ＣＯＲＥＳＥＴは、０乃至１１のインデックスを有する。例えば、ＣＯＲＥＳＥＴは、６つのリソースブロック（ＰＲＢ）と、時間領域内の１つ、２つ、又は３つの連続するＯＦＤＭシンボルとにより構成される。 For example, the base station 200 can configure up to 3 control resource sets (CORESET) for each of up to 4 BWPs on the serving cell. CORESET is a radio resource for control information that the UE 100 should receive. UE 100 may be configured with up to 12 CORESETs on the serving cell. Each CORESET has an index from 0 to 11. For example, a CORESET consists of 6 resource blocks (PRBs) and 1, 2 or 3 consecutive OFDM symbols in the time domain.
　ＭＡＣレイヤは、データの優先制御、ハイブリッドＡＲＱ（ＨＡＲＱ）による再送処理、及びランダムアクセスプロシージャ等を行う。ＵＥ１００のＭＡＣレイヤと基地局２００のＭＡＣレイヤとの間では、トランスポートチャネルを介してデータ及び制御情報が伝送される。基地局２００のＭＡＣレイヤはスケジューラを含む。スケジューラは、上下リンクのトランスポートフォーマット（トランスポートブロックサイズ、変調・符号化方式（ＭＣＳ））及びＵＥ１００への割当リソースを決定する。 The MAC layer performs data priority control, hybrid ARQ (HARQ) retransmission processing, random access procedures, and so on. Data and control information are transmitted between the MAC layer of the UE 100 and the MAC layer of the base station 200 via transport channels. The MAC layer of base station 200 includes a scheduler. The scheduler determines uplink and downlink transport formats (transport block size, modulation and coding scheme (MCS)) and allocation resources to the UE 100 .
　ＲＬＣレイヤは、ＭＡＣレイヤ及びＰＨＹレイヤの機能を利用してデータを受信側のＲＬＣレイヤに伝送する。ＵＥ１００のＲＬＣレイヤと基地局２００のＲＬＣレイヤとの間では、論理チャネルを介してデータ及び制御情報が伝送される。 The RLC layer uses the functions of the MAC layer and PHY layer to transmit data to the RLC layer on the receiving side. Data and control information are transmitted between the RLC layer of the UE 100 and the RLC layer of the base station 200 via logical channels.
　ＰＤＣＰレイヤは、ヘッダ圧縮・伸張、及び暗号化・復号化を行う。 The PDCP layer performs header compression/decompression and encryption/decryption.
　ＰＤＣＰレイヤの上位レイヤとしてＳＤＡＰ（Ｓｅｒｖｉｃｅ　Ｄａｔａ　Ａｄａｐｔａｔｉｏｎ　Ｐｒｏｔｏｃｏｌ）レイヤが設けられていてもよい。ＳＤＡＰ（Ｓｅｒｖｉｃｅ　Ｄａｔａ　Ａｄａｐｔａｔｉｏｎ　Ｐｒｏｔｏｃｏｌ）レイヤは、コアネットワークがＱｏＳ制御を行う単位であるＩＰフローとＡＳ（Ａｃｃｅｓｓ　Ｓｔｒａｔｕｍ）がＱｏＳ制御を行う単位である無線ベアラとのマッピングを行う。 An SDAP (Service Data Adaptation Protocol) layer may be provided as an upper layer of the PDCP layer. The SDAP (Service Data Adaptation Protocol) layer performs mapping between an IP flow, which is the unit of QoS control performed by the core network, and a radio bearer, which is the unit of QoS control performed by the AS (Access Stratum).
　ＲＲＣレイヤは、無線ベアラの確立、再確立及び解放に応じて、論理チャネル、トランスポートチャネル、及び物理チャネルを制御する。ＵＥ１００のＲＲＣレイヤと基地局２００のＲＲＣレイヤとの間では、各種設定のためのＲＲＣシグナリングが伝送される。ＵＥ１００のＲＲＣと基地局２００のＲＲＣとの間にＲＲＣ接続がある場合、ＵＥ１００はＲＲＣコネクティッド状態にある。ＵＥ１００のＲＲＣと基地局２００のＲＲＣとの間にＲＲＣ接続がない場合、ＵＥ１００はＲＲＣアイドル状態にある。ＵＥ１００のＲＲＣと基地局２００のＲＲＣとの間のＲＲＣ接続がサスペンドされている場合、ＵＥ１００はＲＲＣインアクティブ状態にある。 The RRC layer controls logical channels, transport channels and physical channels according to radio bearer establishment, re-establishment and release. RRC signaling for various settings is transmitted between the RRC layer of UE 100 and the RRC layer of base station 200 . When there is an RRC connection between the RRC of UE 100 and the RRC of base station 200, UE 100 is in the RRC connected state. If there is no RRC connection between the RRC of the UE 100 and the RRC of the base station 200, the UE 100 is in RRC idle state. When the RRC connection between the RRC of UE 100 and the RRC of base station 200 is suspended, UE 100 is in RRC inactive state.
　ＲＲＣレイヤの上位に位置するＮＡＳレイヤは、ＵＥ１００のセッション管理及びモビリティ管理を行う。ＵＥ１００のＮＡＳレイヤとコアネットワーク装置３００（ＡＭＦ）のＮＡＳレイヤとの間では、ＮＡＳシグナリングが伝送される。なお、ＵＥ１００は、無線インターフェイスのプロトコル以外にアプリケーションレイヤ等を有する。 The NAS layer located above the RRC layer performs session management and mobility management for UE100. NAS signaling is transmitted between the NAS layer of the UE 100 and the NAS layer of the core network device 300 (AMF). Note that the UE 100 has an application layer and the like in addition to the radio interface protocol.
　（想定シナリオ）
　図３を参照して、実施形態に係る移動通信システム１における想定シナリオについて説明する。 (Assumed scenario)
An assumed scenario in the mobile communication system 1 according to the embodiment will be described with reference to FIG.
　基地局２００は、ＴＲＰ２０１＃１と、ＴＲＰ２０１＃２と、ＤＵ（Ｄｉｓｔｒｉｂｕｔｅｄ　Ｕｎｉｔ）２０２と、ＣＵ（ｃｅｎｔｒａｌ　ｕｎｉｔ）２０３とを有する。図３において、基地局２００がＤＵ２０２及びＣＵ２０３に分離されている一例を示しているが、基地局２００がＤＵ２０２及びＣＵ２０３に分離されていなくてもよい。また、基地局２００のＴＲＰ２０１の数が２つである一例を示しているが、基地局２００のＴＲＰ２０１の数が３つ以上であってもよい。 The base station 200 has a TRP 201 # 1 , a TRP 201 # 2 , a DU (Distributed Unit) 202 and a CU (central unit) 203 . Although FIG. 3 shows an example in which base station 200 is separated into DU202 and CU203, base station 200 may not be separated into DU202 and CU203. Also, although an example in which the number of TRPs 201 in base station 200 is two is shown, the number of TRPs 201 in base station 200 may be three or more.
　ＴＲＰ２０１＃１及びＴＲＰ２０１＃２は、分散して配置され、互いに異なるセルを構成する。具体的には、ＴＲＰ２０１＃１はセルＣ１を形成し、ＴＲＰ２０１＃２はセルＣ２を形成する。 The TRPs 201#1 and TRPs 201#2 are distributed and constitute different cells. Specifically, TRP 201#1 forms cell C1 and TRP 201#2 forms cell C2.
　セルＣ１及びセルＣ２は、同じ周波数に属する。セルＣ１及びセルＣ２は、物理セル識別子（ＰＣＩ）が互いに異なる。すなわち、セルＣ２は、セルＣ１に対応するＴＲＰ２０１＃１とは異なるＴＲＰ＃２により構成され、且つＰＣＩがセルＣ１とは異なるセル（ｃｅｌｌ　ｈａｖｉｎｇ　ＴＲＰ　ｗｉｔｈ　ｄｉｆｆｅｒｅｎｔ　ＰＣＩ）である。図３において、セルＣ２のカバレッジがセルＣ１のカバレッジ内にある一例を示しているが、セルＣ２のカバレッジは、セルＣ１のカバレッジと少なくとも一部が重複していればよい。 Cell C1 and cell C2 belong to the same frequency. Cell C1 and cell C2 have different physical cell identifiers (PCI). That is, the cell C2 is a cell (cell having TRP with different PCI) configured by a TRP #2 different from the TRP 201 #1 corresponding to the cell C1 and having a PCI different from that of the cell C1. Although FIG. 3 shows an example in which the coverage of cell C2 is within the coverage of cell C1, the coverage of cell C2 may at least partially overlap the coverage of cell C1.
　ＤＵ２０２は、ＴＲＰ２０１＃１及びＴＲＰ２０１＃２を制御する。換言すると、ＴＲＰ２０１＃１及びＴＲＰ２０１＃２は、同一のＤＵ２０２の配下にある。ＤＵ２０２は、上述のプロトコルスタックに含まれる下位レイヤ、例えば、ＲＬＣレイヤ、ＭＡＣレイヤ及びＰＨＹレイヤを含むユニットである。ＤＵ２０２は、フロントホールインターフェイスであるＦ１インターフェイスを介してＣＵ２０３と接続される。 DU202 controls TRP201#1 and TRP201#2. In other words, TRP201#1 and TRP201#2 are under the same DU202. The DU 202 is a unit that includes lower layers included in the protocol stack described above, such as the RLC layer, the MAC layer and the PHY layer. DU202 is connected with CU203 via F1 interface which is a fronthaul interface.
　ＣＵ２０３は、ＤＵ２０２を制御する。ＣＵ２０３は、上述のプロトコルスタックに含まれる上位レイヤ、例えば、ＲＲＣレイヤ、ＳＤＡＰレイヤ及びＰＤＣＰレイヤを含むユニットである。ＣＵ２０３は、バックホールインターフェイスであるＮＧインターフェイスを介してコアネットワーク（５ＧＣ３０）と接続される。 CU203 controls DU202. The CU 203 is a unit including upper layers included in the protocol stack described above, such as the RRC layer, the SDAP layer and the PDCP layer. The CU 203 is connected to the core network (5GC 30) via the NG interface, which is a backhaul interface.
　ＵＥ１００は、ＲＲＣコネクティッド状態にあり、基地局２００との無線通信を行う。ＮＲは、ミリ波帯といった高周波数帯による広帯域伝送が可能であるが、このような高周波数帯の電波における電波減衰を補うために、基地局２００とＵＥ１００との間でビームフォーミングを利用し、高いビーム利得を得ている。基地局２００及びＵＥ１００は、ビームペアを確立する。 The UE 100 is in the RRC connected state and performs wireless communication with the base station 200. NR is capable of wideband transmission in a high frequency band such as a millimeter wave band. It has high beam gain. Base station 200 and UE 100 establish a beam pair.
　ＵＥ１００は、サービングであるセルＣ１（ＴＲＰ２０１＃１）とのデータ通信を行う。具体的には、ＵＥ１００は、送信設定指示子（ＴＣＩ）状態＃１に対応するビームを用いてセルＣ１とのデータ通信を行う。ＵＥ１００には、セルＣ１に加えて、非サービングセルであるセル２が設定される。例えば、ＵＥ１００には、セルＣ２に対するビーム測定を行うためのＳＳＢ（ＳＳ／ＰＢＣＨ　Ｂｌｏｃｋ）、及びセル２とのデータ通信を行うための無線リソースがセルＣ１から設定される。なお、ＳＳＢは、プライマリ同期信号（ＰＳＳ）、セカンダリ同期信号（ＳＳＳ）、ＰＢＣＨ（Ｐｈｙｓｉｃａｌ　Ｂｒｏａｄｃａｓｔ　Ｃｈａｎｎｅｌ）、及び復調参照信号（ＤＭＲＳ）を含む。例えば、ＳＳＢは、時間領域において連続した４つのＯＦＤＭシンボルから構成されてもよい。また、ＳＳＢは、周波数領域において連続した２４０サブキャリア（すなわち、２０リソースブロック）から構成されてもよい。ＰＢＣＨは、マスタ情報ブロック（ＭＩＢ）を運ぶ物理チャネルである。 The UE 100 performs data communication with the serving cell C1 (TRP201#1). Specifically, the UE 100 performs data communication with the cell C1 using a beam corresponding to transmission configuration indicator (TCI) state #1. UE 100 is configured with cell 2, which is a non-serving cell, in addition to cell C1. For example, in the UE 100, an SSB (SS/PBCH Block) for performing beam measurement for cell C2 and a radio resource for performing data communication with cell 2 are configured from cell C1. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a PBCH (Physical Broadcast Channel), and a demodulation reference signal (DMRS). For example, an SSB may consist of four consecutive OFDM symbols in the time domain. Also, the SSB may consist of 240 consecutive subcarriers (ie, 20 resource blocks) in the frequency domain. PBCH is a physical channel that carries a Master Information Block (MIB).
　ＵＥ１００は、セルＣ２に対するビーム測定の結果をセルＣ１に報告する。基地局２００（ＤＵ２０２）は、ＵＥ１００からのビーム測定結果をセルＣ１において受信し、ビーム測定結果に基づいて、セルＣ２のビームに対応するＴＣＩ状態＃２をアクティブ化する。そして、ＵＥ１００は、セルＣ１をサービングセルとして維持しつつ、セルＣ１から設定された無線リソースを用いてセルＣ２とのデータ通信を行う。 The UE 100 reports the beam measurement results for the cell C2 to the cell C1. Base station 200 (DU 202) receives beam measurements from UE 100 in cell C1 and activates TCI state #2 corresponding to beams in cell C2 based on the beam measurements. Then, the UE 100 maintains the cell C1 as a serving cell and performs data communication with the cell C2 using radio resources set by the cell C1.
　このように、実施形態では、複数ＴＲＰ伝送のシナリオにおいて、サービングセルであるセルＣ１及び当該セルＣ１と同じ周波数イントラ周波数に属するセルＣ２がＵＥ１００に設定され、ＵＥ１００がセルＣ１をサービングセルとして維持しつつ、セルＣ２とのデータ通信を行うモデルを想定する。 Thus, in the embodiment, in a multiple TRP transmission scenario, cell C1, which is a serving cell, and cell C2 belonging to the same frequency intra-frequency as cell C1 are set in UE 100, and UE 100 maintains cell C1 as a serving cell, Assume a model that performs data communication with cell C2.
　ここで、ＮＲにおけるビームフォーミングに関して説明する。ＰＤＣＣＨのマルチビーム動作を行うために、ＮＲは、ＣＯＲＥＳＥＴごとにビームフォーミングのための上位レイヤ設定であるＴＣＩ状態設定をサポートする。ＵＥ１００がＣＯＲＥＳＥＴと対応付けられたＰＤＣＣＨサーチスペースを監視する場合、ＵＥ１００は、ＣＯＲＥＳＥＴに対して設定されたＴＣＩ状態設定に基づいてＣＯＲＥＳＥＴでＰＤＣＣＨを受信する。ＰＤＣＣＨ受信のためのビーム情報は、下りリンク参照信号とＰＤＣＣＨの復調用参照信号（ＤＭＲＳ）との間の疑似コロケーション（Ｑｕａｓｉ－Ｃｏ－Ｌｏｃａｔｉｏｎ：ＱＣＬ）関係によってＵＥ１００に暗黙的に認識される。ＰＤＣＣＨのＤＭＲＳは、ＱＣＬ－ＴｙｐｅＡ及び／又はＱＣＬ－ＴｙｐｅＤにより下りリンク参照信号と疑似コロケーション関係にある。ＱＣＬ－ＴｙｐｅＡは、ドップラーシフト、ドップラースプレッド、平均遅延、遅延スプレッドなど、ＵＥ１００側で観測されたチャネル統計プロパティに対応する。ＱＣＬ－ＴｙｐｅＤは、ＵＥ１００側の受信ビーム情報に対応する。ＱＣＬ－ＴｙｐｅＤの場合、下りリンク参照信号とＰＤＣＣＨのＤＭＲＳとで空間受信パラメータが同じであると仮定できてもよい。ＰＤＣＣＨのＤＭＲＳがＱＣＬ－ＴｙｐｅＤの下りリンク参照信号と疑似コロケーション関係にある場合、ＵＥ１００がビームフォーミングで下りリンク参照信号を受信するために用いるのと同じ空間受信パラメータを使用してＰＤＣＣＨを受信できる。 Here, beamforming in NR will be explained. In order to perform multi-beam operation of PDCCH, NR supports TCI state setting, which is a higher layer setting for beamforming per CORESET. When UE 100 monitors a PDCCH search space associated with CORESET, UE 100 receives PDCCH on CORESET based on the TCI state settings configured for CORESET. Beam information for PDCCH reception is implicitly recognized by the UE 100 by the QCL relationship between the downlink reference signal and the PDCCH demodulation reference signal (DMRS). DMRS of PDCCH has a pseudo collocation relationship with downlink reference signals by QCL-TypeA and/or QCL-TypeD. QCL-Type A corresponds to channel statistical properties observed at the UE 100 side, such as Doppler shift, Doppler spread, mean delay, delay spread. QCL-TypeD corresponds to reception beam information on the UE 100 side. In the case of QCL-Type D, it may be assumed that the downlink reference signal and DMRS of PDCCH have the same spatial reception parameters. If the PDCCH DMRS is in a pseudo-colocation relationship with the QCL-Type D downlink reference signal, the UE 100 can receive the PDCCH using the same spatial reception parameters used to receive the downlink reference signal in beamforming.
　例えば、基地局２００は、ＲＲＣシグナリングにより、ＣＯＲＥＳＥＴについて複数のＴＣＩ状態を設定する。各ＴＣＩ状態には、下りリンク参照信号リソースに関するパラメータと、ＱＣＬ－ＴｙｐｅＡ及びＱＣＬ－ＴｙｐｅＤに関する下りリンク参照信号及びＰＤＣＣＨのＤＭＲＳポート間のＱＣＬ関係が含まれる。ＵＥ１００は、１つのＰＤＣＣＨを受信するために１つのビームのみを用いる。したがって、複数のＴＣＩ状態がＣＯＲＥＳＥＴに設定されている場合、基地局２００は、例えばＭＡＣ　ＣＥによるアクティブ化コマンドを用いて、ＣＯＲＥＳＥＴに使用されるＴＣＩ状態の１つをアクティブ化する。 For example, the base station 200 sets multiple TCI states for CORESET by RRC signaling. Each TCI state includes parameters for downlink reference signal resources and QCL relationships between downlink reference signals and PDCCH DMRS ports for QCL-TypeA and QCL-TypeD. UE 100 uses only one beam to receive one PDCCH. Therefore, if multiple TCI states are set for CORESET, the base station 200 activates one of the TCI states used for CORESET, for example using an activation command by MAC CE.
　図４を参照して、実施形態に係る想定シナリオにおける基本的なプロシージャについて説明する。 A basic procedure in an assumed scenario according to the embodiment will be described with reference to FIG.
　ステップＳ１において、ＵＥ１００は、例えばＲＲＣシグナリングによりセルＣ１（ＴＲＰ２０１＃１）から設定情報を受信する。設定情報は、セルＣ２（ＴＲＰ２０１＃２）に対するビーム測定に用いるＳＳＢの設定と、データの送受信（セルＣ２とのデータ送受信を含む）のための無線リソースを用いるために必要な設定とを含む。設定情報は、ＣＵ２０３からＤＵ２０２及びセルＣ１（ＴＲＰ２０１＃１）を介してＵＥ１００に送信されてもよい。 In step S1, the UE 100 receives configuration information from the cell C1 (TRP201#1) by, for example, RRC signaling. The setting information includes SSB settings used for beam measurement for cell C2 (TRP201#2) and settings necessary for using radio resources for data transmission/reception (including data transmission/reception with cell C2). Configuration information may be transmitted from CU 203 to UE 100 via DU 202 and cell C1 (TRP 201 #1).
　ステップＳ２において、ＵＥ１００は、ステップＳ１で受信した設定情報（特に、ＳＳＢ設定）を用いてセルＣ２（ＴＲＰ２０１＃２）に対するビーム測定を行い（ステップＳ２ａ）、測定結果を含む報告をセルＣ１（ＴＲＰ２０１＃１）に送信する（ステップＳ２ｂ）。ＤＵ２０２は、セルＣ１（ＴＲＰ２０１＃１）を介してビーム測定結果を受信する。 In step S2, UE 100 performs beam measurement for cell C2 (TRP201#2) using the setting information (in particular, SSB setting) received in step S1 (step S2a), and sends a report including the measurement result to cell C1 (TRP201 #1) (step S2b). DU 202 receives beam measurement results via cell C1 (TRP 201#1).
　ステップＳ３において、ＤＵ２０２は、ステップＳ２で受信したビーム測定結果に基づいて、セルＣ２（ＴＲＰ２０１＃２）と対応付けられたＴＣＩ状態をアクティブ化する指示を、セルＣ１（ＴＲＰ２０１＃１）を介してＵＥ１００に送信する。このようなアクティブ化指示は、レイヤ１（ＰＨＹレイヤ）及びレイヤ２（ＭＡＣレイヤ等）のシグナリングにより行われる。ＵＥ１００は、セルＣ１からのアクティブ化指示の受信に応じて、セルＣ２（ＴＲＰ２０１＃２）と対応付けられたＴＣＩ状態をアクティブ化する。その結果、ＵＥ１００とセルＣ２（ＴＲＰ２０１＃２）とのビームペアが確立される。 In step S3, DU 202 sends an instruction to activate the TCI state associated with cell C2 (TRP201 #2) based on the beam measurement results received in step S2 via cell C1 (TRP201 #1) It transmits to UE100. Such an activation indication is performed by layer 1 (PHY layer) and layer 2 (MAC layer, etc.) signaling. The UE 100 activates the TCI state associated with the cell C2 (TRP201#2) in response to receiving the activation instruction from the cell C1. As a result, a beam pair is established between the UE 100 and the cell C2 (TRP201#2).
　ステップＳ４において、ＵＥ１００は、セルＣ２（ＴＲＰ２０１＃２）上のＵＥ専用チャネルを用いてデータをセルＣ２（ＴＲＰ２０１＃２）と送受信する。ＤＵ２０２は、セルＣ２（ＴＲＰ２０１＃２）を介してデータをＵＥ１００と送受信する。 In step S4, the UE 100 transmits and receives data to and from the cell C2 (TRP201#2) using the UE dedicated channel on the cell C2 (TRP201#2). DU 202 transmits and receives data to and from UE 100 via cell C2 (TRP 201 #2).
　なお、ＵＥ１００は、セルＣ１（ＴＲＰ２０１＃１）のカバレッジ内にあり、共通チャネルであるブロードキャストチャネル（ＢＣＣＨ）やページングチャネル（ＰＣＨ）をセルＣ１（ＴＲＰ２０１＃１）から受信する。 Note that the UE 100 is within the coverage of the cell C1 (TRP201#1) and receives the broadcast channel (BCCH) and paging channel (PCH), which are common channels, from the cell C1 (TRP201#1).
　このようなシナリオ及びプロシージャによれば、ＵＥ１００は、上位レイヤ（特に、ＲＲＣレイヤ）からの切り替え指示に依存せずに、且つ、セルＣ１（ＴＲＰ２０１＃１）からセルＣ２（ＴＲＰ２０１＃２）へのハンドオーバを行うことなく、レイヤ１（ＰＨＹレイヤ）及びレイヤ２（ＭＡＣレイヤ等）におけるビーム管理により、データ通信をセルＣ１（ＴＲＰ２０１＃１）からセルＣ２（ＴＲＰ２０１＃２）に切り替えることができる。すなわち、データ通信を行うセルをレイヤ１（ＰＨＹレイヤ）及びレイヤ２（ＭＡＣレイヤ等）によるビーム切り替えによって実現できる。 According to such a scenario and procedure, the UE 100 can switch from cell C1 (TRP201 #1) to cell C2 (TRP201 #2) without depending on a switching instruction from a higher layer (in particular, the RRC layer). Data communication can be switched from cell C1 (TRP201#1) to cell C2 (TRP201#2) by beam management in layer 1 (PHY layer) and layer 2 (MAC layer, etc.) without handover. That is, a cell for data communication can be realized by beam switching between layer 1 (PHY layer) and layer 2 (MAC layer, etc.).
　上述のシナリオにおいて、ＵＥ１００は、セルＣ１（ＴＲＰ２０１＃１）及びセルＣ２（ＴＲＰ２０１＃２）のそれぞれに対して送信電力制御を行うことが必要であると考えられる。例えば、ＵＥ１００は、例えばセルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信のタイミング調整を行うために、セルＣ２（ＴＲＰ２０１＃２）に対してランダムアクセス（ＲＡ）を行う場合があり、ＲＡについて送信電力制御が必要である。後述の一実施形態において、このようなＲＡに適用する送信電力を適切に制御可能とするためのＰＲＡＣＨ送信電力制御について説明する。なお、ＰＲＡＣＨは、ＲＡプリアンブルを伝送する物理チャネルである。 In the above scenario, it is considered necessary for the UE 100 to perform transmission power control on each of cell C1 (TRP201#1) and cell C2 (TRP201#2). For example, the UE 100 may perform random access (RA) to the cell C2 (TRP201#2) in order to adjust the timing of uplink transmission to the cell C2 (TRP201#2). Control is required. In one embodiment described later, PRACH transmission power control for appropriately controlling the transmission power applied to such RA will be described. PRACH is a physical channel for transmitting RA preambles.
　また、上述のシナリオにおいて、ＵＥ１００は、上りリンク送信について、セルＣ１（ＴＲＰ２０１＃１）及びセルＣ２（ＴＲＰ２０１＃２）のそれぞれに対する上りリンク送信電力を異ならせる必要があると考えられる。上りリンク送信には、サウンディング参照信号（ＳＲＳ）送信、物理上りリンク制御チャネル（ＰＵＣＣＨ）送信、及び物理上りリンク共有チャネル（ＰＵＳＣＨ）送信が含まれる。ＳＲＳは、上りリンク参照信号であって、例えば基地局２００において上りリンクのチャネル推定を行うために用いられる。ＰＵＣＣＨは、上りリンクの制御チャネルであって、上りリンク制御情報（ＵＣＩ）を伝送する物理チャネルである。ＰＵＳＣＨは、上りリンクの共有チャネルであって、上りリンクデータを伝送する物理チャネルである。 Also, in the above scenario, it is considered necessary for the UE 100 to have different uplink transmission powers for cell C1 (TRP201#1) and cell C2 (TRP201#2) for uplink transmission. Uplink transmissions include Sounding Reference Signal (SRS) transmissions, Physical Uplink Control Channel (PUCCH) transmissions, and Physical Uplink Shared Channel (PUSCH) transmissions. The SRS is an uplink reference signal and is used, for example, in the base station 200 to perform uplink channel estimation. PUCCH is an uplink control channel and is a physical channel for transmitting uplink control information (UCI). PUSCH is an uplink shared channel and is a physical channel for transmitting uplink data.
　しかしながら、従来の上りリンクの送信電力制御はサービングセルに対して適用されるため、サービングセルではないセルＣ２（ＴＲＰ２０１＃２）に対する上りリンクの送信電力を適切に制御できない懸念がある。後述の一実施形態において、このような上りリンクの送信電力を適切に制御可能とするための上りリンク送信電力制御（ＳＲＳ／ＰＵＣＣＨ／ＰＵＳＣＨ送信電力制御）について説明する。 However, since the conventional uplink transmission power control is applied to the serving cell, there is a concern that the uplink transmission power for cell C2 (TRP201#2), which is not the serving cell, cannot be controlled appropriately. In one embodiment described later, uplink transmission power control (SRS/PUCCH/PUSCH transmission power control) for appropriately controlling such uplink transmission power will be described.
　また、３ＧＰＰの技術仕様において、複数のサービングセルとの通信を行う動作について、送信電力低減処理（ｔｒａｎｓｍｉｓｓｉｏｎ　ｐｏｗｅｒ　ｒｅｄｕｃｔｉｏｎ）が規定されている。具体的には、ＵＥ１００は、上りリンク送信の種別に応じた優先度及びセルの種別に応じた優先度に基づいて、上りリンク送信の総送信電力が予め定められた最大値以下になるように、各セルに対する各上りリンク送信に送信電力を割り当てる。上述のシナリオにおいても、ＵＥ１００は、送信電力低減処理を行うことが必要であると考えられる。 Also, in the technical specifications of 3GPP, transmission power reduction processing is defined for the operation of communicating with a plurality of serving cells. Specifically, the UE 100 is based on the priority according to the type of uplink transmission and the priority according to the cell type, so that the total transmission power of uplink transmission is equal to or less than a predetermined maximum value. , allocate transmit power to each uplink transmission for each cell. Also in the above scenario, it is considered necessary for the UE 100 to perform transmission power reduction processing.
　しかしながら、従来の送信電力低減処理はサービングセルに対して適用されるため、サービングであるセルＣ１（ＴＲＰ２０１＃１）に加えてサービングセルではないセルＣ２（ＴＲＰ２０１＃２）が設定された場合において送信電力低減処理を適切に行うことができない懸念がある。後述の一実施形態において、サービングであるセルＣ１（ＴＲＰ２０１＃１）に加えてサービングセルではないセルＣ２（ＴＲＰ２０１＃２）が設定された場合における送信電力低減処理について説明する。 However, since the conventional transmission power reduction process is applied to the serving cell, the transmission power is reduced when the non-serving cell C2 (TRP201 #2) is configured in addition to the serving cell C1 (TRP201 #1). There is concern that processing cannot be performed appropriately. In an embodiment described later, transmission power reduction processing when cell C2 (TRP 201 #2), which is not a serving cell, is set in addition to cell C1 (TRP 201 #1), which is a serving cell, will be described.
　（通信装置の構成）
　図５を参照して、実施形態に係るＵＥ１００の構成について説明する。ＵＥ１００は、通信部１１０及び制御部１２０を備える。 (Configuration of communication device)
A configuration of the UE 100 according to the embodiment will be described with reference to FIG. UE 100 includes communication unit 110 and control unit 120 .
　通信部１１０は、無線信号を基地局２００と送受信することによって基地局２００との無線通信を行う。通信部１１０は、少なくとも１つの送信部１１１及び少なくとも１つの受信部１１２を有する。送信部１１１及び受信部１１２は、複数のアンテナ及びＲＦ回路を含んで構成されてもよい。アンテナは、信号を電波に変換し、当該電波を空間に放射する。また、アンテナは、空間における電波を受信し、当該電波を信号に変換する。ＲＦ回路は、アンテナを介して送受信される信号のアナログ処理を行う。ＲＦ回路は、高周波フィルタ、増幅器、変調器及びローパスフィルタ等を含んでもよい。 The communication unit 110 performs wireless communication with the base station 200 by transmitting and receiving wireless signals to and from the base station 200 . The communication unit 110 has at least one transmitter 111 and at least one receiver 112 . The transmitter 111 and receiver 112 may be configured to include multiple antennas and RF circuits. The antenna converts a signal into radio waves and radiates the radio waves into space. Also, the antenna receives radio waves in space and converts the radio waves into signals. The RF circuitry performs analog processing of signals transmitted and received through the antenna. The RF circuitry may include high frequency filters, amplifiers, modulators, low pass filters, and the like.
　制御部１２０は、ＵＥ１００における各種の制御を行う。制御部１２０は、通信部１１０を介した基地局２００との通信を制御する。上述及び後述のＵＥ１００の動作は、制御部１２０の制御による動作であってよい。制御部１２０は、プログラムを実行可能な少なくとも１つのプロセッサ及びプログラムを記憶するメモリを含んでよい。プロセッサは、プログラムを実行して、制御部１２０の動作を行ってもよい。制御部１２０は、アンテナ及びＲＦ回路を介して送受信される信号のデジタル処理を行うデジタル信号プロセッサを含んでもよい。当該デジタル処理は、ＲＡＮのプロトコルスタックの処理を含む。なお、メモリは、プロセッサにより実行されるプログラム、当該プログラムに関するパラメータ、及び、当該プログラムに関するデータを記憶する。メモリは、ＲＯＭ（Ｒｅａｄ　Ｏｎｌｙ　Ｍｅｍｏｒｙ）、ＥＰＲＯＭ（Ｅｒａｓａｂｌｅ　Ｐｒｏｇｒａｍｍａｂｌｅ　Ｒｅａｄ　Ｏｎｌｙ　Ｍｅｍｏｒｙ）、ＥＥＰＲＯＭ（Ｅｌｅｃｔｒｉｃａｌｌｙ　Ｅｒａｓａｂｌｅ　Ｐｒｏｇｒａｍｍａｂｌｅ　Ｒｅａｄ　Ｏｎｌｙ　Ｍｅｍｏｒｙ）、ＲＡＭ（Ｒａｎｄｏｍ　Ａｃｃｅｓｓ　Ｍｅｍｏｒｙ）及びフラッシュメモリの少なくとも１つを含んでよい。メモリの全部又は一部は、プロセッサ内に含まれていてよい。 The control unit 120 performs various controls in the UE 100. Control unit 120 controls communication with base station 200 via communication unit 110 . The operations of the UE 100 described above and below may be operations under the control of the control unit 120 . The control unit 120 may include at least one processor capable of executing a program and a memory that stores the program. The processor may execute a program to operate the control unit 120 . The control unit 120 may include a digital signal processor that performs digital processing of signals transmitted and received through the antenna and RF circuitry. The digital processing includes processing of the protocol stack of the RAN. Note that the memory stores programs executed by the processor, parameters related to the programs, and data related to the programs. The memory may include at least one of ROM (Read Only Memory), EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), RAM (Random Access Memory), and flash memory. All or part of the memory may be included within the processor.
　一実施形態において、ＵＥ１００には、サービングセルであるセルＣ１（ＴＲＰ２０１＃１）及びセルＣ１（ＴＲＰ２０１＃１）と同じ周波数に属するセルＣ２（ＴＲＰ２０１＃２）を管理する基地局２００によって、セルＣ１（ＴＲＰ２０１＃１）及びセルＣ２（ＴＲＰ２０１＃２）が設定される。受信部１１２は、セルＣ２（ＴＲＰ２０１＃２）が送信する下りリンク参照信号を示す参照信号情報をセルＣ１（ＴＲＰ２０１＃１）から受信する。制御部１２０は、参照信号情報を用いてセルＣ２（ＴＲＰ２０１＃２）から受信した下りリンク参照信号に基づいてセルＣ２（ＴＲＰ２０１＃２）とのパスロスを見積もり、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡに適用する送信電力を当該パスロスに基づいて決定する。送信部１１１は、決定された送信電力でＲＡプリアンブルをセルＣ２（ＴＲＰ２０１＃２）に送信する。これにより、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡに適用する送信電力を適切に制御可能になる。 In one embodiment, in the UE 100, the cell C1 ( TRP 201#1) and cell C2 (TRP 201#2) are set. The receiving unit 112 receives reference signal information indicating the downlink reference signal transmitted by the cell C2 (TRP201#2) from the cell C1 (TRP201#1). Control section 120 estimates the path loss with cell C2 (TRP201#2) based on the downlink reference signal received from cell C2 (TRP201#2) using the reference signal information, and estimates the RA for cell C2 (TRP201#2). based on the path loss. Transmitting section 111 transmits the RA preamble to cell C2 (TRP201#2) with the determined transmission power. This makes it possible to appropriately control the transmission power applied to RA for cell C2 (TRP201#2).
　一実施形態において、制御部１２０は、基地局２００からの送信電力制御（ＴＰＣ）コマンドに応じて変化する送信電力調整状態に基づいて上りリンク送信電力（例えば、ＳＲＳ送信電力、ＰＵＣＣＨ送信電力、又はＰＵＳＣＨ送信電力）を決定する。制御部１２０は、セルＣ２（ＴＲＰ２０１＃２）と対応付けられた送信電力調整状態を、セルＣ１（ＴＲＰ２０１＃１）と対応付けられた送信電力調整状態と独立に管理する。送信部１１１は、決定された上りリンク送信電力で上りリンク送信を行う。これにより、セルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信電力を適切に制御可能になる。 In one embodiment, the control unit 120 controls uplink transmission power (for example, SRS transmission power, PUCCH transmission power, or PUSCH transmission power). Control section 120 manages the transmission power adjustment state associated with cell C2 (TRP201#2) independently of the transmission power adjustment state associated with cell C1 (TRP201#1). The transmitter 111 performs uplink transmission with the determined uplink transmission power. This makes it possible to appropriately control the uplink transmission power for cell C2 (TRP201#2).
　一実施形態において、制御部１２０は、上りリンク送信の種別に応じた送信種別優先度及びセルの種別に応じたセル種別優先度に基づいて、上りリンク送信の総送信電力が予め定められた最大値以下になるように、各セルに対する各上りリンク送信に送信電力を割り当てる送信電力低減処理を行う。制御部１２０は、セルＣ１（ＴＲＰ２０１＃１）に適用するセル種別優先度に基づいて、セルＣ２（ＴＲＰ２０１＃２）に適用するセル種別優先度を決定する。例えば、制御部１２０は、セルＣ２（ＴＲＰ２０１＃２）に適用するセル種別優先度を、セルＣ１（ＴＲＰ２０１＃１）に適用するセル種別優先度と等しくする。これにより、サービングセルであるセルＣ１（ＴＲＰ２０１＃１）及び当該セルＣ１（ＴＲＰ２０１＃１）と同じ周波数に属するセルＣ２（ＴＲＰ２０１＃２）が設定される場合においても、送信電力低減処理を適切に行うことが可能になる。 In one embodiment, the control unit 120 sets the total transmission power of uplink transmission to a predetermined maximum based on the transmission type priority according to the type of uplink transmission and the cell type priority according to the cell type. A transmission power reduction process is performed to allocate transmission power to each uplink transmission for each cell so as to be equal to or less than the value. The control unit 120 determines the cell type priority applied to the cell C2 (TRP201#2) based on the cell type priority applied to the cell C1 (TRP201#1). For example, the control unit 120 makes the cell type priority applied to the cell C2 (TRP201#2) equal to the cell type priority applied to the cell C1 (TRP201#1). As a result, even when cell C1 (TRP201#1), which is a serving cell, and cell C2 (TRP201#2) belonging to the same frequency as cell C1 (TRP201#1) are configured, the transmission power reduction process is appropriately performed. becomes possible.
　（基地局の構成）
　図６を参照して、実施形態に係る基地局２００の構成について説明する。基地局２００は、複数のＴＲＰ２０１（図６の例では、ＴＲＰ２０１＃１及びＴＲＰ２０１＃２）と、通信部２１０と、ネットワークインターフェイス２２０と、制御部２３０とを有する。 (Base station configuration)
The configuration of the base station 200 according to the embodiment will be described with reference to FIG. The base station 200 has a plurality of TRPs 201 (TRP 201 # 1 and TRP 201 # 2 in the example of FIG. 6), a communication section 210 , a network interface 220 and a control section 230 .
　各ＴＲＰ２０１は、複数のアンテナを含み、ビームフォーミング可能に構成される。ＴＲＰ２０１は、パネル又はアンテナパネルと称されてもよい。アンテナは、信号を電波に変換し、当該電波を空間に放射する。また、アンテナは、空間における電波を受信し、当該電波を信号に変換する。各ＴＲＰ２０１は、分散して配置され、それぞれセルを構成する。 Each TRP 201 includes multiple antennas and is configured to enable beamforming. TRP 201 may also be referred to as a panel or antenna panel. The antenna converts a signal into radio waves and radiates the radio waves into space. Also, the antenna receives radio waves in space and converts the radio waves into signals. Each TRP 201 is arranged in a distributed manner and constitutes a cell.
　通信部２１０は、例えば、ＵＥ１００からの無線信号を受信し、ＵＥ１００への無線信号を送信する。通信部２１０は、少なくとも１つの送信部２１１及び少なくとも１つの受信部２１２を有する。送信部２１１及び受信部２１２は、ＲＦ回路を含んで構成されてもよい。ＲＦ回路は、アンテナを介して送受信される信号のアナログ処理を行う。ＲＦ回路は、高周波フィルタ、増幅器、変調器及びローパスフィルタ等を含んでもよい。 For example, the communication unit 210 receives radio signals from the UE 100 and transmits radio signals to the UE 100. The communication unit 210 has at least one transmitter 211 and at least one receiver 212 . The transmitting section 211 and the receiving section 212 may be configured including an RF circuit. The RF circuitry performs analog processing of signals transmitted and received through the antenna. The RF circuitry may include high frequency filters, amplifiers, modulators, low pass filters, and the like.
　ネットワークインターフェイス２２０は、信号をネットワークと送受信する。ネットワークインターフェイス２２０は、例えば、基地局間インターフェイスであるＸｎインターフェイスを介して接続された隣接基地局から信号を受信し、隣接基地局へ信号を送信する。また、ネットワークインターフェイス２２０は、例えば、ＮＧインターフェイスを介して接続されたコアネットワーク装置３００から信号を受信し、コアネットワーク装置３００へ信号を送信する。 The network interface 220 transmits and receives signals to and from the network. The network interface 220, for example, receives signals from adjacent base stations connected via an Xn interface, which is an interface between base stations, and transmits signals to adjacent base stations. Also, the network interface 220 receives signals from the core network device 300 connected via the NG interface, for example, and transmits signals to the core network device 300 .
　制御部２３０は、基地局２００における各種の制御を行う。制御部２３０は、例えば、通信部２１０を介したＵＥ１００との通信を制御する。また、制御部２３０は、例えば、ネットワークインターフェイス２２０を介したノード（例えば、隣接基地局、コアネットワーク装置３００）との通信を制御する。上述及び後述の基地局２００の動作は、制御部２３０の制御による動作であってよい。制御部２３０は、プログラムを実行可能な少なくとも１つのプロセッサ及びプログラムを記憶するメモリを含んでよい。プロセッサは、プログラムを実行して、制御部２３０の動作を行ってもよい。制御部２３０は、アンテナ及びＲＦ回路を介して送受信される信号のデジタル処理を行うデジタル信号プロセッサを含んでもよい。当該デジタル処理は、ＲＡＮのプロトコルスタックの処理を含む。なお、メモリは、プロセッサにより実行されるプログラム、当該プログラムに関するパラメータ、及び、当該プログラムに関するデータを記憶する。メモリの全部又は一部は、プロセッサ内に含まれていてよい。 The control unit 230 performs various controls in the base station 200. The control unit 230 controls communication with the UE 100 via the communication unit 210, for example. Also, the control unit 230 controls communication with nodes (for example, adjacent base stations, core network device 300) via the network interface 220, for example. The operations of the base station 200 described above and below may be operations under the control of the control unit 230 . The control unit 230 may include at least one processor capable of executing programs and a memory storing the programs. The processor may execute a program to operate the controller 230 . Control unit 230 may include a digital signal processor that performs digital processing of signals transmitted and received through the antenna and RF circuitry. The digital processing includes processing of the protocol stack of the RAN. Note that the memory stores programs executed by the processor, parameters related to the programs, and data related to the programs. All or part of the memory may be included within the processor.
　なお、基地局２００がＤＵ２０２及びＣＵ２０３に分離されている場合、通信部２１０は、ＤＵ２０２内に設けられてもよく、制御部２３０は、ＤＵ２０２及び／又はＣＵ２０３に設けられていてもよい。 In addition, when the base station 200 is separated into the DU202 and the CU203, the communication unit 210 may be provided in the DU202, and the control unit 230 may be provided in the DU202 and/or the CU203.
　一実施形態において、基地局２００（制御部２３０）は、サービングセルであるセルＣ１（ＴＲＰ２０１＃１）及びセルＣ１（ＴＲＰ２０１＃１）と同じ周波数に属するセルＣ２（ＴＲＰ２０１＃２）をＵＥ１００に設定する。送信部２１１は、セルＣ２（ＴＲＰ２０１＃２）が送信する下りリンク参照信号を示す参照信号情報をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信する。受信部２１２は、当該参照信号情報を用いてセルＣ２（ＴＲＰ２０１＃２）から受信した下りリンク参照信号に基づいて決定された送信電力でＵＥ１００から送信されるＲＡプリアンブルをセルＣ２（ＴＲＰ２０１＃２）において受信する。 In one embodiment, the base station 200 (control unit 230) configures the UE 100 with cell C1 (TRP201#1), which is a serving cell, and cell C2 (TRP201#2) belonging to the same frequency as cell C1 (TRP201#1). . The transmitting section 211 transmits reference signal information indicating the downlink reference signal transmitted by the cell C2 (TRP201#2) to the UE 100 in the cell C1 (TRP201#1). Receiving section 212 transmits the RA preamble transmitted from UE 100 with transmission power determined based on the downlink reference signal received from cell C2 (TRP201#2) using the reference signal information to cell C2 (TRP201#2). receive at
　一実施形態において、送信部２１１は、セルＣ２（ＴＲＰ２０１＃２）の識別子と、基地局２００からの送信電力制御（ＴＰＣ）コマンドに応じて変化する送信電力調整状態の識別子とを対応付ける対応付け情報をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信する。受信部２１２は、セルＣ２（ＴＲＰ２０１＃２）と対応付けられた送信電力調整状態に基づいて決定された上りリンク送信電力でＵＥ１００により行われる上りリンク送信を受信する。 In one embodiment, the transmission unit 211 provides association information that associates the identifier of the cell C2 (TRP201#2) with the identifier of the transmission power adjustment state that changes according to the transmission power control (TPC) command from the base station 200. is transmitted to the UE 100 in the cell C1 (TRP201#1). The receiving unit 212 receives uplink transmission performed by the UE 100 with uplink transmission power determined based on the transmission power adjustment state associated with cell C2 (TRP201#2).
　（ＰＲＡＣＨ送信電力制御）
　（１）動作フロー
　図７を参照して、一実施形態に係るＵＥ１００におけるＰＲＡＣＨ送信電力制御について説明する。 (PRACH transmission power control)
(1) Operation Flow PRACH transmission power control in the UE 100 according to one embodiment will be described with reference to FIG.
　ＵＥ１００は、図７に示す動作フローを、図４に示すプロシージャにおけるステップＳ２からステップＳ４までの間、特に、ステップＳ３からステップＳ４までの間において実行してもよい。例えば、ＵＥ１００は、図４に示すステップＳ３において、セルＣ２（ＴＲＰ２０１＃２）と対応付けられたＴＣＩ状態をアクティブ化する指示をセルＣ１（ＴＲＰ２０１＃１）から受信した後、データをセルＣ２（ＴＲＰ２０１＃２）と送受信するために図７に示す動作フローを実行する。 The UE 100 may execute the operation flow shown in FIG. 7 between steps S2 and S4 in the procedure shown in FIG. 4, particularly between steps S3 and S4. For example, in step S3 shown in FIG. 4, the UE 100 receives an instruction to activate the TCI state associated with the cell C2 (TRP201#2) from the cell C1 (TRP201#1), and then transfers the data to the cell C2 ( The operation flow shown in FIG. 7 is executed to transmit and receive with TRP 201#2).
　図７に示すように、ステップＳ１１において、ＵＥ１００（受信部１１２）は、セルＣ２（ＴＲＰ２０１＃２）が送信する下りリンク参照信号を示す参照信号情報をセルＣ１（ＴＲＰ２０１＃１）から受信する。 As shown in FIG. 7, in step S11, the UE 100 (receiving section 112) receives reference signal information indicating the downlink reference signal transmitted by the cell C2 (TRP201#2) from the cell C1 (TRP201#1).
　ステップＳ１２において、ＵＥ１００（制御部２３０）は、ステップＳ１１で受信した参照信号情報を用いてセルＣ２（ＴＲＰ２０１＃２）から下りリンク参照信号を受信し、受信した下りリンク参照信号に基づいてセルＣ２（ＴＲＰ２０１＃２）とのパスロスを見積もる。 In step S12, the UE 100 (control unit 230) receives the downlink reference signal from cell C2 (TRP 201 #2) using the reference signal information received in step S11, and based on the received downlink reference signal, the cell C2. Estimate the path loss with (TRP 201#2).
　ステップＳ１３において、ＵＥ１００（制御部２３０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡに適用する送信電力を、ステップＳ１２で見積もったパスロスに基づいて決定する。ＲＡは、非競合ランダムアクセス（ＣＦＲＡ）又は競合ベースランダムアクセス（ＣＢＲＡ）である。 In step S13, the UE 100 (control unit 230) determines the transmission power applied to RA for cell C2 (TRP201#2) based on the path loss estimated in step S12. RA is contention-free random access (CFRA) or contention-based random access (CBRA).
　ステップＳ１４において、ＵＥ１００（送信部１１１）は、ステップＳ１３で決定した送信電力でＲＡプリアンブルをセルＣ２（ＴＲＰ２０１＃２）に送信する。 In step S14, the UE 100 (transmitting section 111) transmits the RA preamble to cell C2 (TRP201#2) with the transmission power determined in step S13.
　（２）ＣＦＲＡの場合の動作例
　（２．１）第１動作例
　図８を参照して、ＣＦＲＡの場合におけるＰＲＡＣＨ送信電力制御の第１動作例について説明する。 (2) Operation example in case of CFRA (2.1) First operation example A first operation example of PRACH transmission power control in the case of CFRA will be described with reference to FIG.
　ステップＳ１０１において、基地局２００（制御部２３０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡに用いるべき専用ＲＡプリアンブルをＵＥ１００に割り当てる。専用ＲＡプリアンブルは、セルＣ２（ＴＲＰ２０１＃２）のために準備されたＲＡプリアンブル群の中からＵＥ１００に専用で割り当てられ、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡにおいて他のＵＥ１００と競合しないＲＡプリアンブルである。基地局２００（送信部２１１）は、ＵＥ１００に割り当てた専用ＲＡプリアンブルを示すプリアンブル情報をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信する。ＵＥ１００（受信部１１２）は、プリアンブル情報を受信する。なお、基地局２００（送信部２１１）は、図４のプロシージャのステップＳ１において、ＵＥ１００に割り当てた専用ＲＡプリアンブルを示すプリアンブル情報をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信してもよい。 In step S101, the base station 200 (control unit 230) allocates a dedicated RA preamble to be used for RA for cell C2 (TRP201#2) to UE100. A dedicated RA preamble is assigned exclusively to the UE 100 from among the RA preamble group prepared for the cell C2 (TRP201#2), and is an RA preamble that does not conflict with other UEs 100 in RA for the cell C2 (TRP201#2). be. Base station 200 (transmitting section 211) transmits preamble information indicating a dedicated RA preamble allocated to UE 100 to UE 100 in cell C1 (TRP 201 #1). UE 100 (receiving section 112) receives the preamble information. Note that base station 200 (transmitting section 211) may transmit preamble information indicating the dedicated RA preamble allocated to UE 100 in cell C1 (TRP 201 #1) to UE 100 in step S1 of the procedure in FIG.
　ステップＳ１０２において、基地局２００（制御部２３０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡをＵＥ１００に実行させることを決定する。基地局２００（送信部２１１）は、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡの実行を指示するＰＤＣＣＨ指令をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信する。例えば、基地局２００（送信部２１１）は、下りリンク制御情報（ＤＣＩ）フォーマット１＿０のＤＣＩをＰＤＣＣＨ指令としてセルＣ１（ＴＲＰ２０１＃１）のＰＤＣＣＨ上でＵＥ１００に送信する。ＵＥ１００（受信部１１２）は、ＰＤＣＣＨ指令を受信する。なお、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡをＵＥ１００に実行させるＰＤＣＣＨ指令は、セルＣ１（ＴＲＰ２０１＃１）に対するＲＡをＵＥ１００に実行させるＰＤＣＣＨ指令とは異なる態様でＵＥ１００に送信されてもよい。ここで、ＰＤＣＣＨ指令は、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡに用いるべき専用ＲＡプリアンブルのインデックスを含む。当該専用ＲＡプリアンブルは、ステップＳ１０１でＵＥ１００に割り当てられているＲＡプリアンブルである。本動作例１において、ＰＤＣＣＨ指令は、セルＣ２（ＴＲＰ２０１＃２）が送信するＳＳＢを示す参照信号情報（ＳＳ／ＰＢＣＨ　ｉｎｄｅｘ）を含む。 In step S102, the base station 200 (control unit 230) determines to cause the UE 100 to perform RA for cell C2 (TRP201#2). Base station 200 (transmitting section 211) transmits to UE 100 in cell C1 (TRP201#1) a PDCCH command instructing execution of RA for cell C2 (TRP201#2). For example, the base station 200 (transmitting section 211) transmits DCI of downlink control information (DCI) format 1_0 as a PDCCH command to the UE 100 on the PDCCH of the cell C1 (TRP201#1). UE 100 (receiving unit 112) receives the PDCCH command. The PDCCH command for causing UE 100 to perform RA for cell C2 (TRP 201 #2) may be transmitted to UE 100 in a manner different from the PDCCH command for causing UE 100 to perform RA for cell C1 (TRP 201 #1). Here, the PDCCH command contains the index of the dedicated RA preamble to be used for RA for cell C2 (TRP201#2). The dedicated RA preamble is the RA preamble assigned to the UE 100 in step S101. In this operation example 1, the PDCCH command includes reference signal information (SS/PBCH index) indicating the SSB transmitted by cell C2 (TRP201#2).
　ステップＳ１０３において、ＵＥ１００（受信部１１２）は、ステップＳ１０２でセルＣ１（ＴＲＰ２０１＃１）から受信したＰＤＣＣＨ指令に含まれる参照信号情報（ＳＳ／ＰＢＣＨ　ｉｎｄｅｘ）に基づいてセルＣ２（ＴＲＰ２０１＃２）からＳＳＢを受信する。 In step S103, UE 100 (receiving unit 112) receives from cell C2 (TRP201#2) based on the reference signal information (SS/PBCH index) included in the PDCCH command received from cell C1 (TRP201#1) in step S102. Receive SSB.
　ステップＳ１０４において、ＵＥ１００（制御部１２０）は、ステップＳ１０３でセルＣ２（ＴＲＰ２０１＃２）から受信したＳＳＢに基づいて、セルＣ２（ＴＲＰ２０１＃２）とのパスロスを見積もる。これにより、ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＣＦＲＡに適用する送信電力を適切に算出可能になる。例えば、ＵＥ１００（制御部１２０）は、ステップＳ１０３でセルＣ２（ＴＲＰ２０１＃２）から受信したＳＳＢの受信電力を測定し、ＳＳＢの送信電力から当該受信電力を減算することによりパスロスを見積もる。ＵＥ１００（制御部１２０）は、セルＣ１（ＴＲＰ２０１＃１）又はセルＣ２（ＴＲＰ２０１＃２）から例えばシステム情報中で送信されるＳＳＢ送信電力情報（ｓｓ－ＰＢＣＨ－ＢｌｏｃｋＰｏｗｅｒ）によりＳＳＢの送信電力を特定できる。ここではＳＳＢおよびＳＳＢ送信電力情報を用いてパスロスを見積もる例を示したが、これに限らず、ＵＥ１００（制御部１２０）は、ＣＳＩ－ＲＳを用いてパスロスを見積もることとしてもよい。例えば、ＣＳＩ－ＲＳの送信電力を、あらかじめ設定されたＳＳＢ送信電力情報（ｓｓ－ＰＢＣＨ－ＢｌｏｃｋＰｏｗｅｒ）および所定のオフセット値（ｐｏｗｅｒＣｏｎｔｒｏｌＯｆｆｓｅｔＳＳ）を用いて特定してもよいし、ＣＳＩ－ＲＳおよび／またはＳＳＢの受信電力を、上位レイヤでフィルタリングされたＲＳＲＰとして求めても良い。また、ＰＤＣＣＨ指令がＣＳＩ－ＲＳの情報を参照信号情報として含んでも良い。 In step S104, UE 100 (control unit 120) estimates the path loss with cell C2 (TRP201#2) based on the SSB received from cell C2 (TRP201#2) in step S103. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CFRA for cell C2 (TRP 201 #2). For example, UE 100 (control unit 120) measures the reception power of SSB received from cell C2 (TRP 201 #2) in step S103, and estimates the path loss by subtracting the reception power from the transmission power of SSB. UE 100 (control unit 120) specifies the SSB transmission power by SSB transmission power information (ss-PBCH-BlockPower) transmitted in system information, for example, from cell C1 (TRP201 #1) or cell C2 (TRP201 #2). can. Although an example of estimating path loss using SSB and SSB transmission power information is shown here, the present invention is not limited to this, and UE 100 (control section 120) may estimate path loss using CSI-RS. For example, the transmission power of CSI-RS, it may be specified using preset SSB transmission power information (ss-PBCH-BlockPower) and a predetermined offset value (powerControlOffsetSS), CSI-RS and / or SSB may be obtained as RSRP filtered in higher layers. Also, a PDCCH command may include CSI-RS information as reference signal information.
　ステップＳ１０５において、ＵＥ１００（制御部１２０）は、ステップＳ１０４で見積もったパスロスに基づいて、セルＣ２（ＴＲＰ２０１＃２）に対するＣＦＲＡに適用する送信電力、具体的には、ＰＲＡＣＨの送信電力を決定する。例えば、ＵＥ１００（制御部１２０）は、ＲＡプリアンブルのターゲット受信電力とパスロスとの和をＰＲＡＣＨの送信電力として決定する。 In step S105, the UE 100 (control unit 120) determines the transmission power to be applied to CFRA for cell C2 (TRP201#2), specifically, the transmission power of PRACH, based on the path loss estimated in step S104. For example, the UE 100 (control unit 120) determines the sum of the target reception power of the RA preamble and the path loss as the transmission power of the PRACH.
　ステップＳ１０６において、ＵＥ１００（送信部１１１）は、ステップＳ１０５で決定された送信電力で、ＰＲＡＣＨ上で専用ＲＡプリアンブルをセルＣ２（ＴＲＰ２０１＃２）に送信する。基地局２００（受信部２１２）は、セルＣ２（ＴＲＰ２０１＃２）において専用ＲＡプリアンブルを受信する。ＲＡプリアンブル送信は、ＲＡプロシージャにおけるＭｓｇ１と称される。基地局２００（制御部２３０）は、ＲＡプリアンブルの受信に応じて、ＲＡ応答を生成する。 In step S106, the UE 100 (transmitting section 111) transmits a dedicated RA preamble on the PRACH to cell C2 (TRP201#2) with the transmission power determined in step S105. Base station 200 (receiving section 212) receives the dedicated RA preamble in cell C2 (TRP201#2). RA preamble transmission is referred to as Msg1 in the RA procedure. Base station 200 (control section 230) generates an RA response in response to receiving the RA preamble.
　ステップＳ１０７において、基地局２００（送信部２１１）は、ＲＡ応答をセルＣ１（ＴＲＰ２０１＃１）においてＰＤＳＣＨ上でＵＥ１００に送信する。或いは、基地局２００（送信部２１１）は、ＲＡ応答をセルＣ２（ＴＲＰ２０１＃２）においてＰＤＳＣＨ上でＵＥ１００に送信してもよい。専用ＲＡプリアンブルの送信後、ＵＥ１００（受信部１１２）は、ＲＡ応答をセルＣ１（ＴＲＰ２０１＃１）又はセルＣ２（ＴＲＰ２０１＃２）から受信する。ＲＡ応答送信は、ＲＡプロシージャにおけるＭｓｇ２と称される。ＲＡ応答は、タイミングアライメント情報及び上りリンクグラントを含む。タイミングアライメント情報は、ＵＥ１００からセルＣ２（ＴＲＰ２０１＃２）への送信タイミングを調整するための情報である。上りリンクグラントは、ＵＥ１００に割り当てられたＰＵＳＣＨリソースを示す情報と、ＵＥ１００のＰＵＳＣＨ送信電力を調整するための送信電力制御コマンド（ＴＰＣコマンド）とを含む。その後、ＵＥ１００（送信部２１１）は、割り当てられたＰＵＳＣＨリソースを用いて、ＴＰＣコマンドで調整された送信電力でＰＵＳＣＨ送信を行う。 In step S107, the base station 200 (transmitting section 211) transmits the RA response to the UE 100 on PDSCH in cell C1 (TRP201#1). Alternatively, the base station 200 (transmitting section 211) may transmit the RA response to the UE 100 on the PDSCH in cell C2 (TRP201#2). After transmitting the dedicated RA preamble, UE 100 (receiving section 112) receives an RA response from cell C1 (TRP201#1) or cell C2 (TRP201#2). RA Response transmission is referred to as Msg2 in the RA procedure. The RA response contains timing alignment information and uplink grant. The timing alignment information is information for adjusting the transmission timing from the UE 100 to the cell C2 (TRP201#2). The uplink grant includes information indicating PUSCH resources allocated to UE 100 and a transmission power control command (TPC command) for adjusting PUSCH transmission power of UE 100 . After that, UE 100 (transmitting section 211) performs PUSCH transmission with the transmission power adjusted by the TPC command using the allocated PUSCH resource.
　このように、第１動作例によれば、ＰＤＣＣＨ指令は、セルＣ２（ＴＲＰ２０１＃２）のＳＳＢを示す参照信号情報（ＳＳ／ＰＢＣＨ　ｉｎｄｅｘ）を含む。ＵＥ１００は、ＰＤＣＣＨ指令に含まれる参照信号情報（ＳＳ／ＰＢＣＨ　ｉｎｄｅｘ）に基づいてセルＣ２（ＴＲＰ２０１＃２）からＳＳＢを受信し、受信したＳＳＢに基づいてセルＣ２（ＴＲＰ２０１＃２）とのパスロスを見積もる。これにより、ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＣＦＲＡに適用する送信電力を適切に算出可能になる。 Thus, according to the first operation example, the PDCCH command includes reference signal information (SS/PBCH index) indicating the SSB of cell C2 (TRP201#2). UE 100 receives SSB from cell C2 (TRP201#2) based on the reference signal information (SS/PBCH index) included in the PDCCH command, and detects path loss with cell C2 (TRP201#2) based on the received SSB. estimate. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CFRA for cell C2 (TRP 201 #2).
　（２．２）第２動作例
　図９を参照して、ＣＦＲＡの場合におけるＰＲＡＣＨ送信電力制御の第２動作例について、上述の第１動作例との相違点を主として説明する。 (2.2) Second Operation Example Referring to FIG. 9, a second operation example of PRACH transmission power control in the case of CFRA will be described, mainly focusing on differences from the first operation example described above.
　ステップＳ１１１において、基地局２００（送信部２１１）は、セルＣ２（ＴＲＰ２０１＃２）に対するビーム測定に用いるビーム測定用参照信号を設定するビーム測定設定情報をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信する。ビーム測定設定情報は、セルＣ２（ＴＲＰ２０１＃２）が送信するＳＳＢ又はチャネル状態情報参照信号（ＣＳＩ－ＲＳ）を示す参照信号情報を含む。ＵＥ１００（受信部１１２）は、参照信号情報を含むビーム測定設定情報を受信する。なお、基地局２００（送信部２１１）は、図４のプロシージャのステップＳ１において、参照信号情報を含むビーム測定設定情報をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信してもよい。 In step S111, the base station 200 (transmitting unit 211) transmits beam measurement setting information for setting a beam measurement reference signal used for beam measurement for cell C2 (TRP 201 #2) to UE 100 in cell C1 (TRP 201 #1). do. The beam measurement setting information includes reference signal information indicating the SSB or channel state information reference signal (CSI-RS) transmitted by cell C2 (TRP201#2). The UE 100 (receiving section 112) receives beam measurement setting information including reference signal information. Note that the base station 200 (transmitting section 211) may transmit beam measurement setting information including reference signal information to the UE 100 in the cell C1 (TRP 201#1) in step S1 of the procedure in FIG.
　ステップＳ１１２において、基地局２００（制御部２３０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡに用いるべき専用ＲＡプリアンブルをＵＥ１００に割り当てる。基地局２００（送信部２１１）は、ＵＥ１００に割り当てた専用ＲＡプリアンブルを示すプリアンブル情報をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信する。ＵＥ１００（受信部１１２）は、プリアンブル情報を受信する。基地局２００（送信部２１１）は、図４のプロシージャのステップＳ１において、ＵＥ１００に割り当てた専用ＲＡプリアンブルを示すプリアンブル情報をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信してもよい。 In step S112, the base station 200 (control unit 230) assigns to the UE 100 a dedicated RA preamble to be used for RA for cell C2 (TRP201#2). Base station 200 (transmitting section 211) transmits preamble information indicating a dedicated RA preamble allocated to UE 100 to UE 100 in cell C1 (TRP 201 #1). UE 100 (receiving section 112) receives the preamble information. Base station 200 (transmitting section 211) may transmit preamble information indicating the dedicated RA preamble allocated to UE 100 in cell C1 (TRP 201 #1) to UE 100 in step S1 of the procedure in FIG.
　ステップＳ１１３において、基地局２００（制御部２３０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡをＵＥ１００に実行させることを決定する。基地局２００（送信部２１１）は、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡの実行を指示するＰＤＣＣＨ指令をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信する。 In step S113, the base station 200 (control unit 230) determines to cause the UE 100 to perform RA for cell C2 (TRP201#2). Base station 200 (transmitting section 211) transmits to UE 100 in cell C1 (TRP201#1) a PDCCH command instructing execution of RA for cell C2 (TRP201#2).
　ステップＳ１１４において、ＵＥ１００（受信部１１２）は、ステップＳ１１１でセルＣ１（ＴＲＰ２０１＃１）から受信したビーム測定設定情報に含まれる参照信号情報に基づいてセルＣ２（ＴＲＰ２０１＃２）から下りリンク参照信号（ＳＳＢ又はＣＳＩ－ＲＳ）を受信する。 In step S114, the UE 100 (receiving unit 112) receives downlink reference signals from the cell C2 (TRP201#2) based on the reference signal information included in the beam measurement configuration information received from the cell C1 (TRP201#1) in step S111. (SSB or CSI-RS).
　ステップＳ１１５において、ＵＥ１００（制御部１２０）は、ステップＳ１１４でセルＣ２（ＴＲＰ２０１＃２）から受信した下りリンク参照信号（ＳＳＢ又はＣＳＩ－ＲＳ）に基づいて、セルＣ２（ＴＲＰ２０１＃２）とのパスロスを見積もる。これにより、ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＣＦＲＡに適用する送信電力を適切に算出可能になる。例えば、ＵＥ１００（制御部１２０）は、ステップＳ１１４でセルＣ２（ＴＲＰ２０１＃２）から受信したＳＳＢの受信電力を測定し、ＳＳＢの送信電力から当該受信電力を減算することによりパスロスを見積もる。ＵＥ１００（制御部１２０）は、セルＣ１（ＴＲＰ２０１＃１）又はセルＣ２（ＴＲＰ２０１＃２）から例えばシステム情報中で送信されるＳＳＢ送信電力情報（ｓｓ－ＰＢＣＨ－ＢｌｏｃｋＰｏｗｅｒ）によりＳＳＢの送信電力を特定できる。ここではＳＳＢおよびＳＳＢ送信電力情報を用いてパスロスを見積もる例を示したが、これに限らず、ＵＥ１００（制御部１２０）は、ＣＳＩ－ＲＳを用いてパスロスを見積もることとしてもよい。例えば、ＣＳＩ－ＲＳの送信電力を、あらかじめ設定されたＳＳＢ送信電力情報（ｓｓ－ＰＢＣＨ－ＢｌｏｃｋＰｏｗｅｒ）および所定のオフセット値（ｐｏｗｅｒＣｏｎｔｒｏｌＯｆｆｓｅｔＳＳ）を用いて特定してもよいし、ＣＳＩ－ＲＳおよび／またはＳＳＢの受信電力を、上位レイヤでフィルタリングされたＲＳＲＰとして求めても良い。 In step S115, UE 100 (control unit 120), based on the downlink reference signal (SSB or CSI-RS) received from cell C2 (TRP201 #2) in step S114, path loss with cell C2 (TRP201 #2) Estimate. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CFRA for cell C2 (TRP 201 #2). For example, UE 100 (control unit 120) measures the reception power of SSB received from cell C2 (TRP 201 #2) in step S114, and estimates the path loss by subtracting the reception power from the transmission power of SSB. UE 100 (control unit 120) specifies the SSB transmission power by SSB transmission power information (ss-PBCH-BlockPower) transmitted in system information, for example, from cell C1 (TRP201 #1) or cell C2 (TRP201 #2). can. Although an example of estimating path loss using SSB and SSB transmission power information is shown here, the present invention is not limited to this, and UE 100 (control section 120) may estimate path loss using CSI-RS. For example, the transmission power of CSI-RS, it may be specified using preset SSB transmission power information (ss-PBCH-BlockPower) and a predetermined offset value (powerControlOffsetSS), CSI-RS and / or SSB may be obtained as RSRP filtered in higher layers.
　ステップＳ１１６において、ＵＥ１００（制御部１２０）は、ステップＳ１１５で見積もったパスロスに基づいて、セルＣ２（ＴＲＰ２０１＃２）に対するＣＦＲＡに適用する送信電力、具体的には、ＰＲＡＣＨの送信電力を決定する。例えば、ＵＥ１００（制御部１２０）は、ＲＡプリアンブルのターゲット受信電力とパスロスとの和をＰＲＡＣＨの送信電力として決定する。 In step S116, the UE 100 (control unit 120) determines the transmission power to be applied to CFRA for cell C2 (TRP201#2), specifically, the transmission power of PRACH, based on the path loss estimated in step S115. For example, the UE 100 (control unit 120) determines the sum of the target reception power of the RA preamble and the path loss as the transmission power of the PRACH.
　ステップＳ１１７及びステップＳ１１８の動作は、上述の第１動作例と同様である。 The operations in steps S117 and S118 are the same as in the first operation example described above.
　このように、第２動作例によれば、セルＣ２（ＴＲＰ２０１＃２）に対するビーム測定に用いるビーム測定用参照信号を設定するビーム測定設定情報は、セルＣ２（ＴＲＰ２０１＃２）が送信する下りリンク参照信号（ＳＳＢ又はＣＳＩ－ＲＳ）を示す参照信号情報を含む。ＵＥ１００は、ビーム測定設定情報に含まれる参照信号情報に基づいてセルＣ２（ＴＲＰ２０１＃２）から下りリンク参照信号を受信し、受信した下りリンク参照信号に基づいてセルＣ２（ＴＲＰ２０１＃２）とのパスロスを見積もる。これにより、ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＣＦＲＡに適用する送信電力を適切に算出可能になる。 Thus, according to the second operation example, the beam measurement setting information for setting the beam measurement reference signal used for beam measurement for cell C2 (TRP201#2) is the downlink transmitted by cell C2 (TRP201#2). It includes reference signal information indicating a reference signal (SSB or CSI-RS). UE 100 receives the downlink reference signal from cell C2 (TRP 201 #2) based on the reference signal information included in the beam measurement configuration information, and communicates with cell C2 (TRP 201 #2) based on the received downlink reference signal. Estimate path loss. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CFRA for cell C2 (TRP 201 #2).
　（２．３）第３動作例
　図１０を参照して、ＣＦＲＡの場合におけるＰＲＡＣＨ送信電力制御の第３動作例について、上述の第１動作例及び第２動作例との相違点を主として説明する。 (2.3) Third operation example Referring to FIG. 10, a third operation example of PRACH transmission power control in the case of CFRA will be described, mainly focusing on differences from the first and second operation examples described above. .
　ステップＳ１２１において、基地局２００（送信部２１１）は、セルＣ２（ＴＲＰ２０１＃２）からＰＤＣＣＨを受信するための１つ又は複数のＴＣＩ状態を設定するＴＣＩ状態設定情報をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信する。ＴＣＩ状態設定情報は、セルＣ２（ＴＲＰ２０１＃２）が送信する下りリンク参照信号（ＳＳＢ又はＣＳＩ－ＲＳ）を示す参照信号情報を含む。具体的には、各ＴＣＩ状態には、下りリンク参照信号リソースに関するパラメータからなる参照信号情報と、ＱＣＬ－ＴｙｐｅＡ及びＱＣＬ－ＴｙｐｅＤに関する下りリンク参照信号及びＰＤＣＣＨのＤＭＲＳポート間のＱＣＬ関係とが含まれる。ＵＥ１００（受信部１１２）は、参照信号情報を含むＴＣＩ状態設定情報を受信する。 In step S121, the base station 200 (transmitting section 211) transmits TCI state setting information for setting one or more TCI states for receiving PDCCH from cell C2 (TRP201#2) to cell C1 (TRP201#1). is transmitted to the UE 100 in. The TCI state setting information includes reference signal information indicating a downlink reference signal (SSB or CSI-RS) transmitted by cell C2 (TRP201#2). Specifically, each TCI state includes reference signal information consisting of parameters related to downlink reference signal resources, downlink reference signals related to QCL-Type A and QCL-Type D, and QCL relationships between DMRS ports of PDCCH. . UE 100 (receiving section 112) receives TCI state setting information including reference signal information.
　基地局２００（送信部２１１）は、図４のプロシージャのステップＳ１において、参照信号情報を含むＴＣＩ状態設定情報をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信してもよい。 The base station 200 (transmitting section 211) may transmit TCI state setting information including reference signal information to the UE 100 in cell C1 (TRP201#1) in step S1 of the procedure in FIG.
　ステップＳ１２２において、基地局２００（制御部２３０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡに用いるべき専用ＲＡプリアンブルをＵＥ１００に割り当てる。基地局２００（送信部２１１）は、ＵＥ１００に割り当てた専用ＲＡプリアンブルを示すプリアンブル情報をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信する。ＵＥ１００（受信部１１２）は、プリアンブル情報を受信する。 In step S122, the base station 200 (control unit 230) assigns to the UE 100 a dedicated RA preamble to be used for RA for cell C2 (TRP201#2). Base station 200 (transmitting section 211) transmits preamble information indicating a dedicated RA preamble allocated to UE 100 to UE 100 in cell C1 (TRP 201 #1). UE 100 (receiving section 112) receives the preamble information.
　ステップＳ１２３において、基地局２００（制御部２３０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡをＵＥ１００に実行させることを決定する。基地局２００（送信部２１１）は、セルＣ２（ＴＲＰ２０１＃２）に対するＲＡの実行を指示するＰＤＣＣＨ指令をセルＣ１（ＴＲＰ２０１＃１）および／またはセルＣ２（ＴＲＰ２０１＃２）においてＵＥ１００に送信する。 In step S123, the base station 200 (control unit 230) determines to cause the UE 100 to perform RA for cell C2 (TRP201#2). Base station 200 (transmitting section 211) transmits to UE 100 in cell C1 (TRP201#1) and/or cell C2 (TRP201#2) a PDCCH command instructing execution of RA for cell C2 (TRP201#2).
　ステップＳ１２４において、ＵＥ１００（受信部１１２）は、ステップＳ１２１でセルＣ１（ＴＲＰ２０１＃１）および／またはセルＣ２（ＴＲＰ２０１＃２）から受信したＴＣＩ状態設定情報に含まれる参照信号情報に基づいてセルＣ２（ＴＲＰ２０１＃２）から下りリンク参照信号（ＳＳＢ又はＣＳＩ－ＲＳ）を受信する。例えば、ＵＥ１００（受信部１１２）は、図４のプロシージャのステップＳ３においてアクティブ化されたＴＣＩ状態と対応付けられた下りリンク参照信号（ＳＳＢ又はＣＳＩ－ＲＳ）を受信する。 In step S124, UE 100 (receiving unit 112) receives cell C1 (TRP201#1) and/or cell C2 (TRP201#2) in step S121 based on the reference signal information included in the TCI state setting information. (TRP 201#2) receives a downlink reference signal (SSB or CSI-RS). For example, the UE 100 (receiving unit 112) receives the downlink reference signal (SSB or CSI-RS) associated with the TCI state activated in step S3 of the procedure in FIG.
　ステップＳ１２５において、ＵＥ１００（制御部１２０）は、ステップＳ１２４でセルＣ２（ＴＲＰ２０１＃２）から受信した下りリンク参照信号（ＳＳＢ又はＣＳＩ－ＲＳ）に基づいて、セルＣ２（ＴＲＰ２０１＃２）とのパスロスを見積もる。これにより、ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＣＦＲＡに適用する送信電力を適切に算出可能になる。例えば、ＵＥ１００（制御部１２０）は、ステップＳ１２４でセルＣ２（ＴＲＰ２０１＃２）から受信したＳＳＢの受信電力を測定し、ＳＳＢの送信電力から当該受信電力を減算することによりパスロスを見積もる。ＵＥ１００（制御部１２０）は、セルＣ１（ＴＲＰ２０１＃１）又はセルＣ２（ＴＲＰ２０１＃２）から例えばシステム情報中で送信されるＳＳＢ送信電力情報（ｓｓ－ＰＢＣＨ－ＢｌｏｃｋＰｏｗｅｒ）によりＳＳＢの送信電力を特定できる。ここではＳＳＢおよびＳＳＢ送信電力情報を用いてパスロスを見積もる例を示したが、これに限らず、ＵＥ１００（制御部１２０）は、ＣＳＩ－ＲＳを用いてパスロスを見積もることとしてもよい。例えば、ＣＳＩ－ＲＳの送信電力を、あらかじめ設定されたＳＳＢ送信電力情報（ｓｓ－ＰＢＣＨ－ＢｌｏｃｋＰｏｗｅｒ）および所定のオフセット値（ｐｏｗｅｒＣｏｎｔｒｏｌＯｆｆｓｅｔＳＳ）を用いて特定してもよいし、ＣＳＩ－ＲＳおよび／またはＳＳＢの受信電力を、上位レイヤでフィルタリングされたＲＳＲＰとして求めても良い。 In step S125, UE 100 (control unit 120), based on the downlink reference signal (SSB or CSI-RS) received from cell C2 (TRP201 #2) in step S124, path loss with cell C2 (TRP201 #2) Estimate. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CFRA for cell C2 (TRP 201 #2). For example, UE 100 (control unit 120) measures the reception power of SSB received from cell C2 (TRP 201 #2) in step S124, and estimates the path loss by subtracting the reception power from the transmission power of SSB. UE 100 (control unit 120) specifies the SSB transmission power by SSB transmission power information (ss-PBCH-BlockPower) transmitted in system information, for example, from cell C1 (TRP201 #1) or cell C2 (TRP201 #2). can. Although an example of estimating path loss using SSB and SSB transmission power information is shown here, the present invention is not limited to this, and UE 100 (control section 120) may estimate path loss using CSI-RS. For example, the transmission power of CSI-RS, it may be specified using preset SSB transmission power information (ss-PBCH-BlockPower) and a predetermined offset value (powerControlOffsetSS), CSI-RS and / or SSB may be obtained as RSRP filtered in higher layers.
　ステップＳ１２６において、ＵＥ１００（制御部１２０）は、ステップＳ１２５で見積もったパスロスに基づいて、セルＣ２（ＴＲＰ２０１＃２）に対するＣＦＲＡに適用する送信電力、具体的には、ＰＲＡＣＨの送信電力を決定する。例えば、ＵＥ１００（制御部１２０）は、ＲＡプリアンブルのターゲット受信電力とパスロスとの和をＰＲＡＣＨの送信電力として決定する。 In step S126, the UE 100 (control unit 120) determines the transmission power to be applied to CFRA for cell C2 (TRP201#2), specifically, the transmission power of PRACH, based on the path loss estimated in step S125. For example, the UE 100 (control unit 120) determines the sum of the target reception power of the RA preamble and the path loss as the transmission power of the PRACH.
　ステップＳ１２７及びステップＳ１２８の動作は、上述の第１動作例と同様である。 The operations in steps S127 and S128 are the same as in the first operation example described above.
　このように、第３動作例によれば、セルＣ２（ＴＲＰ２０１＃２）からＰＤＣＣＨを受信するためのＴＣＩ状態を設定するＴＣＩ状態設定情報は、セルＣ２（ＴＲＰ２０１＃２）が送信する下りリンク参照信号（ＳＳＢ又はＣＳＩ－ＲＳ）を示す参照信号情報を含む。ＵＥ１００は、ＴＣＩ状態設定情報に含まれる参照信号情報に基づいてセルＣ２（ＴＲＰ２０１＃２）から下りリンク参照信号を受信し、受信した下りリンク参照信号に基づいてセルＣ２（ＴＲＰ２０１＃２）とのパスロスを見積もる。これにより、ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＣＦＲＡに適用する送信電力を適切に算出可能になる。 Thus, according to the third operation example, the TCI state setting information for setting the TCI state for receiving the PDCCH from cell C2 (TRP201#2) is the downlink reference transmitted by cell C2 (TRP201#2). It contains reference signal information indicating the signal (SSB or CSI-RS). UE 100 receives the downlink reference signal from cell C2 (TRP201#2) based on the reference signal information included in the TCI state setting information, and communicates with cell C2 (TRP201#2) based on the received downlink reference signal. Estimate path loss. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CFRA for cell C2 (TRP 201 #2).
　（３）ＣＢＲＡの場合の動作例
　図１１を参照して、ＣＢＲＡの場合におけるＰＲＡＣＨ送信電力制御の動作例について説明する。 (3) Operation example in the case of CBRA An operation example of PRACH transmission power control in the case of CBRA will be described with reference to FIG.
　ステップＳ２０１において、基地局２００は、図４のプロシージャのステップＳ１の動作を行う。具体的には、基地局２００（送信部２１１）は、例えばＲＲＣシグナリングにより、セルＣ２（ＴＲＰ２０１＃２）に関する設定情報をセルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信する。設定情報は、セルＣ２（ＴＲＰ２０１＃２）に対するビーム測定に用いるＳＳＢの設定と、データの送受信（セルＣ２とのデータ送受信を含む）のための無線リソースを用いるために必要な設定とを含む。ここで、基地局２００（送信部２１１）は、セルＣ２（ＴＲＰ２０１＃２）に対するＣＢＲＡに利用可能な１つ又は複数のＲＡリソース（ＣＢＲＡプリアンブル群）に関するＲＡ設定情報を、セルＣ１（ＴＲＰ２０１＃１）においてＵＥ１００に送信する。このようなＣＢＲＡプリアンブルは、他のＵＥ１００と競合し得るＲＡプリアンブルである。ＲＡ設定情報（各ＲＡリソース）は、下りリンク参照信号としてセルＣ２（ＴＲＰ２０１＃２）のＳＳＢを示す参照信号情報を含む。ＵＥ１００（受信部１１２）は、設定情報を受信する。 In step S201, the base station 200 performs the operation of step S1 of the procedure in FIG. Specifically, the base station 200 (transmitting section 211) transmits configuration information regarding the cell C2 (TRP201#2) to the UE 100 in the cell C1 (TRP201#1) by RRC signaling, for example. The setting information includes SSB settings used for beam measurement for cell C2 (TRP201#2) and settings necessary for using radio resources for data transmission/reception (including data transmission/reception with cell C2). Here, the base station 200 (transmitting section 211) transmits RA configuration information regarding one or more RA resources (CBRA preamble group) that can be used for CBRA for cell C2 (TRP201#2) to cell C1 (TRP201#1). ) to the UE 100. Such a CBRA preamble is an RA preamble that can compete with other UEs 100. The RA configuration information (each RA resource) includes reference signal information indicating the SSB of cell C2 (TRP201#2) as a downlink reference signal. UE 100 (receiving unit 112) receives the setting information.
　ステップＳ２０２において、ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）へのＣＢＲＡを実行することを決定する。ＣＢＲＡの実行を決定する要因は、基地局２００（送信部２１１）からのＰＤＣＣＨ指令であってもよく、ＭＡＣまたはＲＲＣ等の上位レイヤ指示により開始されてもよい。ここでのＣＢＲＡを実行するＰＤＣＣＨ指令は、予め定められたプリアンブルのインデックスを通知する（例えばＰＤＣＣＨ指令に含まれるＲＡ－ＰｒｅａｍｂｌｅＩｎｄｅｘの値が０ｂ００００００として提供される）ことにより特定されてもよい。ＵＥ１００（制御部１２０）は、ステップＳ２０１で受信したＲＡ設定情報に基づいて、セルＣ２（ＴＲＰ２０１＃２）に対するＣＢＲＡに利用可能なＣＢＲＡプリアンブル群の中からＲＡプリアンブルをランダムに選択する。ＵＥ１００（制御部１２０）は、選択したＲＡプリアンブルと対応付けられたＳＳＢを特定する。すなわち、ＵＥ１００（制御部１２０）は、基地局２００から通知されたＲＡリソースの中からＣＢＲＡプリアンブルを選択し、選択したＣＢＲＡプリアンブルと対応付けられたＳＳＢを特定する。 In step S202, the UE 100 (control unit 120) determines to perform CBRA to cell C2 (TRP201#2). The factor that determines the execution of CBRA may be a PDCCH command from base station 200 (transmitter 211), or may be initiated by a higher layer command such as MAC or RRC. The PDCCH command for performing CBRA here may be identified by notifying a predetermined preamble index (for example, the value of RA-PreambleIndex included in the PDCCH command is provided as 0b000000). UE 100 (control unit 120) randomly selects an RA preamble from a group of CBRA preambles that can be used for CBRA for cell C2 (TRP201#2) based on the RA setting information received in step S201. UE 100 (control unit 120) identifies the SSB associated with the selected RA preamble. That is, UE 100 (control section 120) selects a CBRA preamble from RA resources notified from base station 200, and identifies an SSB associated with the selected CBRA preamble.
　ステップＳ２０３において、ＵＥ１００（受信部１１２）は、ステップＳ２０２で特定したＳＳＢをセルＣ２（ＴＲＰ２０１＃２）から受信する。 In step S203, the UE 100 (receiving unit 112) receives the SSB identified in step S202 from cell C2 (TRP201#2).
　ステップＳ２０４において、ＵＥ１００（制御部１２０）は、ステップＳ２０３でセルＣ２（ＴＲＰ２０１＃２）から受信したＳＳＢに基づいて、セルＣ２（ＴＲＰ２０１＃２）とのパスロスを見積もる。これにより、ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＣＢＲＡに適用する送信電力を適切に算出可能になる。例えば、ＵＥ１００（制御部１２０）は、ステップＳ２０３でセルＣ２（ＴＲＰ２０１＃２）から受信したＳＳＢの受信電力を測定し、ＳＳＢの送信電力から当該受信電力を減算することによりパスロスを見積もる。ＵＥ１００（制御部１２０）は、セルＣ１（ＴＲＰ２０１＃１）又はセルＣ２（ＴＲＰ２０１＃２）から例えばシステム情報中で送信されるＳＳＢ送信電力情報（ｓｓ－ＰＢＣＨ－ＢｌｏｃｋＰｏｗｅｒ）によりＳＳＢの送信電力を特定できる。ここではＳＳＢおよびＳＳＢ送信電力情報を用いてパスロスを見積もる例を示したが、これに限らず、ＵＥ１００（制御部１２０）は、ＣＳＩ－ＲＳを用いてパスロスを見積もることとしてもよい。例えば、ＣＳＩ－ＲＳの送信電力を、あらかじめ設定されたＳＳＢ送信電力情報（ｓｓ－ＰＢＣＨ－ＢｌｏｃｋＰｏｗｅｒ）および所定のオフセット値（ｐｏｗｅｒＣｏｎｔｒｏｌＯｆｆｓｅｔＳＳ）を用いて特定してもよいし、ＣＳＩ－ＲＳおよび／またはＳＳＢの受信電力を、上位レイヤでフィルタリングされたＲＳＲＰとして求めても良い。 In step S204, UE 100 (control unit 120) estimates the path loss with cell C2 (TRP201#2) based on the SSB received from cell C2 (TRP201#2) in step S203. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CBRA for cell C2 (TRP 201 #2). For example, UE 100 (control unit 120) measures the reception power of SSB received from cell C2 (TRP 201 #2) in step S203, and estimates the path loss by subtracting the reception power from the transmission power of SSB. UE 100 (control unit 120) specifies the SSB transmission power by SSB transmission power information (ss-PBCH-BlockPower) transmitted in system information, for example, from cell C1 (TRP201 #1) or cell C2 (TRP201 #2). can. Although an example of estimating path loss using SSB and SSB transmission power information is shown here, the present invention is not limited to this, and UE 100 (control section 120) may estimate path loss using CSI-RS. For example, the transmission power of CSI-RS, it may be specified using preset SSB transmission power information (ss-PBCH-BlockPower) and a predetermined offset value (powerControlOffsetSS), CSI-RS and / or SSB may be obtained as RSRP filtered in higher layers.
　ステップＳ２０５において、ＵＥ１００（制御部１２０）は、ステップＳ２０４で見積もったパスロスに基づいて、セルＣ２（ＴＲＰ２０１＃２）に対するＣＢＲＡに適用する送信電力、具体的には、ＰＲＡＣＨの送信電力を決定する。例えば、ＵＥ１００（制御部１２０）は、ＲＡプリアンブルのターゲット受信電力とパスロスとの和をＰＲＡＣＨの送信電力として決定する。 In step S205, the UE 100 (control unit 120) determines the transmission power applied to CBRA for cell C2 (TRP201#2), specifically, the transmission power of PRACH, based on the path loss estimated in step S204. For example, the UE 100 (control unit 120) determines the sum of the target reception power of the RA preamble and the path loss as the transmission power of the PRACH.
　ステップＳ２０６において、ＵＥ１００（送信部１１１）は、ステップＳ２０５で決定された送信電力で、ＰＲＡＣＨ上でＣＢＲＡプリアンブルをセルＣ２（ＴＲＰ２０１＃２）に送信する。基地局２００（受信部２１２）は、セルＣ２（ＴＲＰ２０１＃２）においてＣＢＲＡプリアンブルを受信する。基地局２００（制御部２３０）は、ＲＡプリアンブルの受信に応じて、ＲＡ応答を生成する。 In step S206, the UE 100 (transmitting section 111) transmits the CBRA preamble on the PRACH to cell C2 (TRP201#2) with the transmission power determined in step S205. Base station 200 (receiving section 212) receives the CBRA preamble in cell C2 (TRP201#2). Base station 200 (control section 230) generates an RA response in response to receiving the RA preamble.
　ステップＳ２０７において、基地局２００（送信部２１１）は、ＲＡ応答をセルＣ１（ＴＲＰ２０１＃１）においてＰＤＳＣＨ上でＵＥ１００に送信する。或いは、基地局２００（送信部２１１）は、ＲＡ応答をセルＣ２（ＴＲＰ２０１＃２）においてＰＤＳＣＨ上でＵＥ１００に送信してもよい。ＣＢＲＡプリアンブルの送信後、ＵＥ１００（受信部１１２）は、ＲＡ応答をセルＣ１（ＴＲＰ２０１＃１）又はセルＣ２（ＴＲＰ２０１＃２）から受信する。ＲＡ応答は、ＲＡプリアンブル識別子、タイミングアライメント情報、上りリンクグラント、及びｔｅｍｐｏｒａｒｙ　Ｃ－ＲＮＴＩを含む。ＵＥ１００（制御部１２０）は、Ｍｓｇ１のＲＡプリアンブルと同じＲＡプリアンブル識別子を含むＲＡ応答を受信すると、ＲＡ成功と判断する。タイミングアライメント情報は、ＵＥ１００からセルＣ２（ＴＲＰ２０１＃２）への送信タイミングを調整するための情報である。上りリンクグラントは、ＵＥ１００に割り当てられたＰＵＳＣＨリソースを示す情報と、ＵＥ１００のＰＵＳＣＨ送信電力を調整するための送信電力制御コマンド（ＴＰＣコマンド）とを含む。その後、ＵＥ１００（送信部２１１）は、割り当てられたＰＵＳＣＨリソースを用いて、ＴＰＣコマンドで調整された送信電力でＰＵＳＣＨ送信を行う。 In step S207, the base station 200 (transmitting section 211) transmits the RA response to the UE 100 on PDSCH in cell C1 (TRP201#1). Alternatively, the base station 200 (transmitting section 211) may transmit the RA response to the UE 100 on the PDSCH in cell C2 (TRP201#2). After transmitting the CBRA preamble, UE 100 (receiving section 112) receives an RA response from cell C1 (TRP201#1) or cell C2 (TRP201#2). The RA response includes an RA preamble identifier, timing alignment information, uplink grant, and temporary C-RNTI. UE 100 (control unit 120) determines RA success upon receiving an RA response including the same RA preamble identifier as the RA preamble of Msg1. The timing alignment information is information for adjusting the transmission timing from the UE 100 to the cell C2 (TRP201#2). The uplink grant includes information indicating PUSCH resources allocated to UE 100 and a transmission power control command (TPC command) for adjusting PUSCH transmission power of UE 100 . After that, UE 100 (transmitting section 211) performs PUSCH transmission with the transmission power adjusted by the TPC command using the allocated PUSCH resource.
　このように、本動作例によれば、ＲＡ設定情報は、セルＣ２（ＴＲＰ２０１＃２）に対するＣＢＲＡに利用可能な１つ又は複数のＲＡリソース（ＣＢＲＡプリアンブル群）を含み、各ＲＡリソースは、セルＣ２（ＴＲＰ２０１＃２）のＳＳＢを示す参照信号情報を含む。ＵＥ１００は、ＲＡ設定情報に含まれる参照信号情報に基づいてセルＣ２（ＴＲＰ２０１＃２）からＳＳＢを受信し、受信したＳＳＢに基づいてセルＣ２（ＴＲＰ２０１＃２）とのパスロスを見積もる。これにより、ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）に対するＣＢＲＡに適用する送信電力を適切に算出可能になる。 Thus, according to this operation example, the RA configuration information includes one or more RA resources (CBRA preamble group) that can be used for CBRA for cell C2 (TRP201#2), and each RA resource is a cell It includes reference signal information indicating the SSB of C2 (TRP201#2). UE 100 receives SSB from cell C2 (TRP 201 #2) based on the reference signal information included in the RA configuration information, and estimates the path loss with cell C2 (TRP 201 #2) based on the received SSB. This enables UE 100 (control section 120) to appropriately calculate transmission power to be applied to CBRA for cell C2 (TRP 201 #2).
　（ＳＲＳ／ＰＵＣＣＨ／ＰＵＳＣＨ送信電力制御）
　図１２を参照して、一実施形態に係るＵＥ１００における上りリンク送信電力制御について説明する。ＵＥ１００（制御部１２０）は、上りリンク送信電力としてＳＲＳの送信電力を決定してもよい。ＵＥ１００（制御部１２０）は、上りリンク送信電力としてＰＵＣＣＨの送信電力を決定してもよい。ＵＥ１００（制御部１２０）は、上りリンク送信電力としてＰＵＳＣＨの送信電力を決定してもよい。 (SRS/PUCCH/PUSCH transmission power control)
Uplink transmission power control in the UE 100 according to one embodiment will be described with reference to FIG. The UE 100 (control section 120) may determine the transmission power of the SRS as the uplink transmission power. UE 100 (control section 120) may determine the transmission power of PUCCH as the uplink transmission power. The UE 100 (control section 120) may determine the transmission power of PUSCH as the uplink transmission power.
　ステップＳ２１において、ＵＥ１００（受信部１１２）は、セルＣ２（ＴＲＰ２０１＃２）の識別子と送信電力調整状態の識別子とを対応付ける対応付け情報をセルＣ１（ＴＲＰ２０１＃１）から受信してもよい。送信電力調整状態（ａｄｊｕｓｔｍｅｎｔ　ｓｔａｔｅ）は、基地局２００からのＴＰＣコマンドに応じて変化する変数であり、上りリンク送信電力の計算式において用いられる。これにより、セルＣ２（ＴＲＰ２０１＃２）用の送信電力調整状態を基地局２００が設定できる。例えば、ＴＰＣコマンドから得られた補正値を累積して算出することで得られる送信電力調整状態を、送信電力に適用する（ＴＰＣアキュムレーションと称しても良い）場合には、現在の送信電力に対する相対値（上昇値又は低下値）を指定する。送信電力調整状態は、ＴＰＣコマンドにより指定された上昇値に応じて上昇し、ＴＰＣコマンドにより指定された低下値に応じて低下してもよい。あるいは、ＴＰＣコマンドから得られた補正値を累積して算出することなく、直前に受信した一つの補正値を送信電力調整状態として送信電力に適用する（ＴＰＣアブソリュートと称しても良い）こととしてもよい。ＴＰＣコマンドは、例えば上りリンクスケジューリンググラントのＤＣＩにＰＵＳＣＨのＴＰＣコマンドを含めても良いし、下りリンクスケジューリング割り当てのＤＣＩに、下りリンクデータに対するＨＡＲＱ－ＡＣＫを含む上りリンク制御情報を送信するためのＰＵＣＣＨに対する、ＴＰＣコマンドを含めても良い。また、ＴＰＣコマンドは、スケジューリングに用いられない非スケジューリングＤＣＩを用い通知することとしてもよく、ＰＵＳＣＨおよびＰＵＳＣＨのためのＴＰＣコマンドの送信のために用いられるＤＣＩ（例えばＤＣＩフォーマット２＿２）を用いて通知することとでもよいし、１または複数のＵＥ１００に対するＳＲＳ送信のためのＴＰＣコマンドのグループを送信するために用いられるＤＣＩ（例えばＤＣＩフォーマット２＿３）を用いて通知してもよい。 In step S21, the UE 100 (receiving unit 112) may receive, from the cell C1 (TRP201#1), association information that associates the identifier of the cell C2 (TRP201#2) with the identifier of the transmission power adjustment state. The transmission power adjustment state is a variable that changes according to the TPC command from the base station 200, and is used in the uplink transmission power calculation formula. This allows the base station 200 to set the transmission power adjustment state for cell C2 (TRP201#2). For example, when the transmission power adjustment state obtained by accumulating and calculating the correction value obtained from the TPC command is applied to the transmission power (which may be referred to as TPC accumulation), the relative Specify a value (up or down). The transmit power adjustment state may be increased according to an increase value specified by the TPC command and decreased according to a decrease value specified by the TPC command. Alternatively, one correction value received immediately before is applied to the transmission power as a transmission power adjustment state without accumulating and calculating the correction values obtained from the TPC commands (this may be referred to as TPC absolute). good. The TPC command may include, for example, the TPC command of PUSCH in the DCI of the uplink scheduling grant, or the PUCCH for transmitting uplink control information including HARQ-ACK for downlink data in the DCI of the downlink scheduling assignment. may include a TPC command for In addition, the TPC command may be notified using a non-scheduling DCI that is not used for scheduling, and is notified using a DCI (eg, DCI format 2_2) used for transmitting TPC commands for PUSCH and PUSCH. Alternatively, DCI (for example, DCI format 2_3) used to transmit a group of TPC commands for SRS transmission to one or more UEs 100 may be used for notification.
　対応付け情報は、図４のプロシージャのステップＳ１において基地局２００からＵＥ１００に対して送信及び設定されてもよい。具体的には、ＵＥ１００（受信部１１２）は、セルＣ２（ＴＲＰ２０１＃２）に対するビーム測定に用いる設定情報と、セルＣ２（ＴＲＰ２０１＃２）とのデータ通信のための無線リソースに関する設定情報と、をセルＣ１（ＴＲＰ２０１＃１）から受信するとともに、セルＣ２（ＴＲＰ２０１＃２）の識別子と送信電力調整状態の識別子とを対応付ける対応付け情報をセルＣ１（ＴＲＰ２０１＃１）から受信してもよい。 The association information may be transmitted and set from the base station 200 to the UE 100 in step S1 of the procedure in FIG. Specifically, the UE 100 (receiving unit 112) includes configuration information used for beam measurement for cell C2 (TRP201 #2), configuration information related to radio resources for data communication with cell C2 (TRP201 #2), is received from the cell C1 (TRP201#1), and association information that associates the identifier of the cell C2 (TRP201#2) with the identifier of the transmission power adjustment state may be received from the cell C1 (TRP201#1).
　ステップＳ２２において、ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）と対応付けられた送信電力調整状態を、セルＣ１（ＴＲＰ２０１＃１）と対応付けられた送信電力調整状態と独立に管理する。例えば、ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）用のＴＰＣコマンドを基地局２００から受信したことに応じて、セルＣ２（ＴＲＰ２０１＃２）と対応付けられた送信電力調整状態を更新する。また、ＵＥ１００（制御部１２０）は、セルＣ１（ＴＲＰ２０１＃１）用のＴＰＣコマンドを基地局２００から受信したことに応じて、セルＣ１（ＴＲＰ２０１＃１）と対応付けられた送信電力調整状態を更新してもよい。 In step S22, UE 100 (control unit 120) manages the transmission power adjustment state associated with cell C2 (TRP201#2) independently of the transmission power adjustment state associated with cell C1 (TRP201#1). do. For example, UE 100 (control unit 120) changes the transmission power adjustment state associated with cell C2 (TRP201#2) in response to receiving a TPC command for cell C2 (TRP201#2) from base station 200. Update. Further, UE 100 (control unit 120) changes the transmission power adjustment state associated with cell C1 (TRP201 #1) in response to receiving the TPC command for cell C1 (TRP201 #1) from base station 200. You may update.
　ステップＳ２３において、ＵＥ１００（制御部１２０）は、送信電力調整状態に基づいて上りリンク送信電力を決定する。例えば、ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）と対応付けられた送信電力調整状態に基づいて、セルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信電力を決定する。また、ＵＥ１００（制御部１２０）は、セルＣ１（ＴＲＰ２０１＃１）と対応付けられた送信電力調整状態に基づいて、セルＣ１（ＴＲＰ２０１＃１）に対する上りリンク送信電力を決定してもよい。 In step S23, the UE 100 (control unit 120) determines uplink transmission power based on the transmission power adjustment state. For example, UE 100 (control section 120) determines uplink transmission power for cell C2 (TRP201#2) based on the transmission power adjustment state associated with cell C2 (TRP201#2). Also, the UE 100 (control section 120) may determine the uplink transmission power for the cell C1 (TRP201#1) based on the transmission power adjustment state associated with the cell C1 (TRP201#1).
　ステップＳ２４において、ＵＥ１００（送信部１１１）は、ステップＳ２３で決定された上りリンク送信電力で上りリンク送信を行う。例えば、ＵＥ１００（送信部１１１）は、セルＣ２（ＴＲＰ２０１＃２）に対して決定された上りリンク送信電力でセルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信を行う。ＵＥ１００（送信部１１１）は、セルＣ１（ＴＲＰ２０１＃１）に対して決定された上りリンク送信電力でセルＣ１（ＴＲＰ２０１＃１）に対する上りリンク送信を行ってもよい。 In step S24, the UE 100 (transmitting unit 111) performs uplink transmission with the uplink transmission power determined in step S23. For example, UE 100 (transmitting section 111) performs uplink transmission to cell C2 (TRP201#2) with uplink transmission power determined for cell C2 (TRP201#2). The UE 100 (transmitting section 111) may perform uplink transmission to the cell C1 (TRP201#1) with the determined uplink transmission power for the cell C1 (TRP201#1).
　このように、ＵＥ１００は、非サービングセルであるセルＣ２（ＴＲＰ２０１＃２）と対応付けられた送信電力調整状態を、セルＣ１（ＴＲＰ２０１＃１）と対応付けられた送信電力調整状態と独立に管理する。これにより、セルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信電力を適切に決定可能になる。 In this way, UE 100 manages the transmission power adjustment state associated with cell C2 (TRP201 #2), which is a non-serving cell, independently of the transmission power adjustment state associated with cell C1 (TRP201 #1). . This makes it possible to appropriately determine the uplink transmission power for cell C2 (TRP201#2).
　図１３を参照して、一実施形態に係るＵＥ１００における上りリンク送信電力制御の具体例について説明する。 A specific example of uplink transmission power control in the UE 100 according to one embodiment will be described with reference to FIG.
　ＵＥ１００（制御部１２０）は、ＳＲＳの送信電力ＰＳＲＳ，ｂ，ｆ，ｃ、ＰＵＣＣＨの送信電力ＰＰＵＣＣＨ，ｂ，ｆ，ｃ、及びＰＵＳＣＨの送信電力ＰＰＵＳＣＨ，ｂ，ｆ，ｃを次の計算式により決定する（３ＧＰＰ　ＴＳ３８．２１３参照）。 UE 100 (control unit 120) sets SRS transmission power P SRS,b,f,c , PUCCH transmission power P PUCCH,b,f,c , and PUSCH transmission power P PUSCH,b,f,c as follows: Determined by a formula (see 3GPP TS38.213).
　PSRS,b,f,c(i, qs, l) = min{ PCMAX,f,c(i), PO_SRS,b,f,c(qs) + 10log10(2μ・MSRS,b,fc(i)) + αSRS,b,f,c(qs)・PLb,f,c(qd) + hb,f,c(i, l) }　　　　・・・（１）
　PPUCCH,b,f,c(i, qu, qd, l) = min{ PCMAX,f,c(i), PO_PUCCH,b,f,c(qu) + 10log10(2μ・MPUCCH RB,b,fc(i)) + PLb,f,c(qd) + ΔF_PUCCH(F) + ΔTF,b,f,c(i) + gb,f,c(i, l) }　　　　・・・（２）
　PPUSCH,b,f,c(i, j, qd, l) = min{ PCMAX,f,c(i), PO_PUSCH,b,f,c(j) + 10log10(2μ・MPUSCH RB,b,fc(i)) + αb,f,c(j)・PLb,f,c(qd) + ΔTF,b,f,c(i) + fb,f,c(i, l) }　　　　・・・（３）
　ここで、“ｂ”は、上りリンクＢＷＰ（ＵＬ　ＢＷＰ）を、“ｆ”はキャリアを、“ｃ”はサービングセルを、“ｉ”は送信機会（ｔｘ　ｏｃｃａｓｉｏｎ）をそれぞれ意味する。また、“ｊ”はパラメータセット設定（ｐａｒａｍｅｔｅｒ　ｓｅｔ　ｃｏｎｆｉｇ．）を、“ｑｓ”及び“ｑｄ”は参照信号リソース識別子（ＲＳ　ｒｅｓｏｕｒｃｅ）を、“ｑｓ”はｐ０－ＰＵＣＣＨ識別子（ｐ０－ＰＵＣＣＨ　ｉｄ）を、“ｌ”は送信電力調整状態（ａｄｊｕｓｔｍｅｎｔ　ｓｔａｔｅ）の識別子をそれぞれ意味する。 P SRS,b,f,c (i, q s , l) = min{ P CMAX,f,c (i), P O_SRS,b,f,c (q s ) + 10log 10 (2 μ M SRS ,b,fc (i)) + α SRS,b,f,c (q s )・PL b,f,c (q d ) + h b,f,c (i, l) } (1 )
P PUCCH,b,f,c (i, q u , q d , l) = min{ P CMAX,f,c (i), P O_PUCCH,b,f,c (q u ) + 10log 10 (2 μ・MPUCCHRB ,b,fc (i)) + PLb ,f,c ( qd ) + ΔF_PUCCH (F) + ΔTF ,b,f,c (i) + gb ,f,c (i , l) } (2)
P PUSCH,b,f,c (i, j, q d , l) = min{ P CMAX,f,c (i), P O_PUSCH,b,f,c (j) + 10log 10 (2 μ M PUSCH RB,b,fc (i)) + αb ,f,c (j)・PLb ,f,c ( qd ) + ΔTF,b,f,c (i) + fb ,f,c (i, l) } (3)
Here, 'b' denotes uplink BWP (UL BWP), 'f' denotes carrier, 'c' denotes serving cell, and 'i' denotes transmission opportunity (tx occurrence). Also, "j" is a parameter set configuration (parameter set config.), "q s " and "q d " are reference signal resource identifiers (RS resource), and "q s " is a p0-PUCCH identifier (p0-PUCCH id), and "l" means the identifier of the transmission power adjustment state.
　式（１）乃至式（３）において、“ｈｂ，ｆ，ｃ”はＳＲＳ向けの送信電力調整状態であり、“ｇｂ，ｆ，ｃ”はＰＵＣＣＨ向けの送信電力調整状態であり、“ｆｂ，ｆ，ｃ”はＰＵＳＣＨ向けの送信電力調整状態である。これらの送信電力調整状態は、識別子“ｌ”を用いて使い分けることができる。例えば、“ｌ”は、“０”又は“１”の値である。ＴＰＣアキュムレーションを用いる送信電力調整状態は、物理チャネル毎、ＳＲＳのリソースを示す識別子（例えばＳＲＳリソースＩＤ、および／または複数のＳＲＳリソースを示すＳＲＳリソースセットＩＤ）毎に行なうかどうかが基地局２００よりＵＥ１００に対し設定されてもよい。また、ＳＲＳの送信電力調整状態は、ＵＥ１００にてＰＵＳＣＨに適用される送信電力調整状態を流用しても良い。 In equations (1) to (3), "h b, f, c " is the transmission power adjustment state for SRS, "g b, f, c " is the transmission power adjustment state for PUCCH, and " f b,f,c ″ is the transmission power adjustment state for PUSCH. These transmission power adjustment states can be selectively used using the identifier "l". For example, "l" is a value of "0" or "1". The base station 200 determines whether the transmission power adjustment state using TPC accumulation is performed for each physical channel and for each identifier indicating an SRS resource (for example, an SRS resource ID and/or an SRS resource set ID indicating a plurality of SRS resources). It may be set for the UE 100. Also, the transmission power adjustment state applied to PUSCH in the UE 100 may be used as the transmission power adjustment state of SRS.
　例えば、基地局２００は、送信電力調整状態の識別子“ｌ”として“１”をセルＣ２（ＴＲＰ２０１＃２）と対応付ける対応付け情報をＵＥ１００に通知及び設定してもよい。ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）向けに、識別子“ｌ”＝“１”と対応付けられた“ｈｂ，ｆ，ｃ”、“ｇｂ，ｆ，ｃ”、及び“ｆｂ，ｆ，ｃ”を管理してもよい。或いは、このような対応付け情報の通知は行わず、既定の設定値“ｌ”＝“２”又は非ゼロのときに、上りリンク送信電力がセルＣ２（ＴＲＰ２０１＃２）と対応付けて決定されてもよい。 For example, the base station 200 may notify and configure the UE 100 of association information that associates "1" as the identifier "l" of the transmission power adjustment state with the cell C2 (TRP 201 #2). UE 100 (control unit 120) is for cell C2 (TRP201 #2), "h b, f, c ", "g b, f, c " associated with identifier "l" = "1", and "fb ,f,c " may be managed. Alternatively, without notification of such association information, the uplink transmission power is determined in association with cell C2 (TRP201#2) when the default setting value "l" = "2" or non-zero. may
　セルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信電力Ｐ’ｉは、セルＣ１（ＴＲＰ２０１＃１）と対応付けて決定されてもよい。例えば、式（１）乃至式（３）において、サービングセルを表す“ｃ”は、セルＣ１（ＴＲＰ２０１＃１）及びセルＣ２（ＴＲＰ２０１＃２）で共通化してもよい。 The uplink transmission power P'i for cell C2 (TRP201#2) may be determined in association with cell C1 (TRP201#1). For example, in formulas (1) to (3), "c" representing a serving cell may be shared between cell C1 (TRP 201#1) and cell C2 (TRP 201#2).
　ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）と対応付けられた参照信号リソースを用いて見積もられるパスロス（PLb,f,c）にさらに基づいて、セルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信電力を決定してもよい。パスロス（PLb,f,c）は、上述のＰＲＡＣＨ送信電力制御で見積もられたパスロスであってもよい。ＵＥ１００（受信部１１２）は、上述のステップＳ２１において、セルＣ２（ＴＲＰ２０１＃２）の識別子と参照信号リソースの識別子（ｑｄ）とを対応付ける対応付け情報をセルＣ１（ＴＲＰ２０１＃１）から受信してもよい。ＵＥ１００（制御部１２０）は、当該対応付け情報に基づいて、セルＣ２（ＴＲＰ２０１＃２）の参照信号リソースを特定してパスロスを見積もってもよい。 UE 100 (control unit 120) further based on the path loss (PL b,f,c ) estimated using the reference signal resource associated with cell C2 (TRP201#2) for cell C2 (TRP201#2) Uplink transmit power may be determined. The pathloss (PL b,f,c ) may be the pathloss estimated by the PRACH transmission power control described above. UE 100 (receiving unit 112), in step S21 described above, receives the association information that associates the identifier of cell C2 (TRP201#2) with the identifier of the reference signal resource (q d ) from cell C1 (TRP201#1). may The UE 100 (control unit 120) may identify the reference signal resource of the cell C2 (TRP201#2) and estimate the path loss based on the association information.
　ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）と対応付けられた電力制御パラメータセット設定（ｐａｒａｍｅｔｅｒ　ｓｅｔ　ｃｏｎｆｉｇ．）にさらに基づいて、セルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信電力を決定してもよい。ＵＥ１００（受信部１１２）は、上述のステップＳ２１において、セルＣ２（ＴＲＰ２０１＃２）の識別子と電力制御パラメータセット設定の識別子（ｊ）とを対応付ける対応付け情報をセルＣ１（ＴＲＰ２０１＃１）から受信してもよい。これにより、セルＣ２（ＴＲＰ２０１＃２）に対する電力制御パラメータセット設定（ｐａｒａｍｅｔｅｒ　ｓｅｔ　ｃｏｎｆｉｇ．）をＵＥ１００に指定できる。 UE 100 (control unit 120) determines uplink transmission power for cell C2 (TRP201#2) further based on the power control parameter set configuration (parameter set config.) associated with cell C2 (TRP201#2). You may UE 100 (receiving unit 112) receives, in step S21 described above, association information that associates the identifier of cell C2 (TRP201#2) with the identifier (j) of the power control parameter set setting from cell C1 (TRP201#1). You may This allows the UE 100 to specify the power control parameter set configuration (parameter set config.) for the cell C2 (TRP201#2).
　（送信電力低減処理）
　図１４を参照して、一実施形態に係るＵＥ１００における送信電力低減処理について説明する。 (Transmission power reduction processing)
Transmission power reduction processing in the UE 100 according to one embodiment will be described with reference to FIG. 14 .
　ステップＳ３１において、ＵＥ１００（制御部１２０）は、上述のような方法で決定された各チャネルの送信電力の合計、すなわち、ある送信機会（ｉ）における上りリンク送信の総送信電力が、予め定められた最大値以下であるか否かを判定する。予め定められた最大値は、法定の最大値であって、３ＧＰＰの技術仕様（例えば、ＴＳ３８．１０１）で規定された値であってもよい。 In step S31, the UE 100 (control unit 120) determines in advance the total transmission power of each channel determined by the method described above, that is, the total transmission power of uplink transmission in a certain transmission opportunity (i). It is determined whether or not it is less than or equal to the maximum value. The predetermined maximum value is a legal maximum value, and may be a value specified in the technical specifications of 3GPP (eg, TS38.101).
　上りリンク送信の総送信電力が最大値以下である場合（ステップＳ３１：ＹＥＳ）、送信電力低減処理が行われず、ＵＥ１００（送信部１１１）は、ある送信機会（ｉ）における各チャネルの上りリンク送信を行う（ステップＳ３５）。 When the total transmission power of uplink transmission is equal to or less than the maximum value (step S31: YES), transmission power reduction processing is not performed, and UE 100 (transmitting unit 111) performs uplink transmission of each channel in a certain transmission opportunity (i). (step S35).
　一方、上りリンク送信の総送信電力が最大値を超える場合（ステップＳ３１：ＮＯ）、ステップＳ３２において、ＵＥ１００（制御部１２０）は、送信機会（ｉ）における上りリンク送信が非サービングセルであるセルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信を含むか否かを判定する。送信機会（ｉ）における上りリンク送信がセルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信を含まない場合（ステップＳ３２：ＮＯ）、動作がステップＳ３４に進む。 On the other hand, if the total transmission power of uplink transmission exceeds the maximum value (step S31: NO), in step S32, the UE 100 (control unit 120) determines that the uplink transmission in the transmission opportunity (i) is cell C2, which is a non-serving cell. It is determined whether or not uplink transmission for (TRP201#2) is included. If the uplink transmission in transmission opportunity (i) does not include uplink transmission for cell C2 (TRP201#2) (step S32: NO), operation proceeds to step S34.
　送信機会（ｉ）における上りリンク送信がセルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信を含む場合（ステップＳ３２：ＹＥＳ）、ステップＳ３３において、ＵＥ１００（制御部１２０）は、セルＣ１（ＴＲＰ２０１＃１）に適用するセル種別優先度に基づいて、セルＣ２（ＴＲＰ２０１＃２）に適用するセル種別優先度を決定する。ＵＥ１００（制御部１２０）は、セルＣ２（ＴＲＰ２０１＃２）に適用するセル種別優先度を、セルＣ１（ＴＲＰ２０１＃１）に適用するセル種別優先度と等しくしてもよい。 If uplink transmission in transmission opportunity (i) includes uplink transmission to cell C2 (TRP201#2) (step S32: YES), in step S33, UE 100 (control unit 120) controls cell C1 (TRP201#1). The cell type priority applied to cell C2 (TRP 201#2) is determined based on the cell type priority applied to . The UE 100 (control unit 120) may make the cell type priority applied to the cell C2 (TRP201#2) equal to the cell type priority applied to the cell C1 (TRP201#1).
　ステップＳ３４において、ＵＥ１００（制御部１２０）は、送信機会（ｉ）についての送信電力低減処理を行う。具体的には、ＵＥ１００（制御部１２０）は、上りリンク送信の種別に応じた送信種別優先度及びセルの種別に応じたセル種別優先度に基づいて、上りリンク送信の総送信電力が予め定められた最大値以下になるように、各セルに対する各上りリンク送信に送信電力を割り当てる。ここで、セルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信が含まれる場合、セルＣ２（ＴＲＰ２０１＃２）に対して、セルＣ１（ＴＲＰ２０１＃１）に適用するセル種別優先度と等しい優先度を与えてもよい。なお、ＵＥ１００（送信部１１１）は、セルＣ１（ＴＲＰ２０１＃１）に対する上りリンク送信及びセルＣ２（ＴＲＰ２０１＃２）に対する上りリンク送信を互いに異なるタイミングで行うため、セルＣ１（ＴＲＰ２０１＃１）に適用するセル種別優先度と等しい優先度をセルＣ２（ＴＲＰ２０１＃２）に与えても問題ない。 In step S34, the UE 100 (control unit 120) performs transmission power reduction processing for transmission opportunity (i). Specifically, the UE 100 (control unit 120) determines in advance the total transmission power of uplink transmission based on the transmission type priority according to the type of uplink transmission and the cell type priority according to the cell type. Allocate transmit power to each uplink transmission for each cell so that it is less than or equal to the specified maximum value. Here, when uplink transmission for cell C2 (TRP201#2) is included, the same priority as the cell type priority applied to cell C1 (TRP201#1) is given to cell C2 (TRP201#2). may UE 100 (transmitting section 111) performs uplink transmission to cell C1 (TRP201#1) and uplink transmission to cell C2 (TRP201#2) at different timings, so this is applied to cell C1 (TRP201#1). There is no problem in giving cell C2 (TRP201#2) the same priority as the cell type priority to be used.
　ステップＳ３５において、ＵＥ１００（送信部１１１）は、送信機会（ｉ）についての上りリンク送信を行う。 In step S35, the UE 100 (transmitting unit 111) performs uplink transmission for transmission opportunity (i).
　図１５を参照して、一実施形態に係るＵＥ１００における送信電力低減処理の具体例について説明する。 A specific example of transmission power reduction processing in the UE 100 according to one embodiment will be described with reference to FIG.
　プライマリセル（ＰＣｅｌｌ）におけるＰＲＡＣＨ送信に最も高い優先度が与えられ、ＰＵＣＣＨ送信及びＰＵＳＣＨ送信に次に高い優先度が与えられ、ＳＲＳ送信、又はプライマリセル以外のセルにおけるＰＲＡＣＨ送信に最も低い優先度が与えられる。また、同じ優先度であってキャリアアグリゲーションである場合、セカンダリセルよりもプライマリセルに高い優先度が与えられる。 The highest priority is given to PRACH transmission in the primary cell (PCell), the next highest priority is given to PUCCH transmission and PUSCH transmission, and the lowest priority is given to SRS transmission or PRACH transmission in cells other than the primary cell. Given. Also, in the case of the same priority and carrier aggregation, a higher priority is given to the primary cell than to the secondary cell.
　このような送信電力低減処理における優先度付けにおいて、“ｃｅｌｌ　ｈａｖｉｎｇ　ＴＲＰ　ｗｉｔｈ　ｄｉｆｆｅｒｅｎｔ　ＰＣＩ”（すなわち、セルＣ２）がサービングセル（すなわち、セルＣ１）と共にＵＥ１００に設定された場合、セルＣ１及びセルＣ２に同じ優先度（ｓａｍｅ　ｐｒｉｏｒｉｔｙ　ｆｏｒ　ｔｒａｎｓｍｉｓｓｉｏｎ　ｐｏｗｅｒ　ｒｅｄｕｃｔｉｏｎ）が適用される。 In such prioritization in transmission power reduction processing, when "cell having TRP with different PCI" (that is, cell C2) is set in UE 100 together with the serving cell (that is, cell C1), the same Priority (same priority for transmission power reduction) is applied.
　（その他の実施形態）
　上述の実施形態における動作シーケンス（及び動作フロー）は、必ずしもフロー図又はシーケンス図に記載された順序に沿って時系列に実行されなくてよい。例えば、動作におけるステップは、フロー図又はシーケンス図として記載した順序と異なる順序で実行されても、並列的に実行されてもよい。また、動作におけるステップの一部が削除されてもよく、さらなるステップが処理に追加されてもよい。また、上述の実施形態における動作シーケンス（及び動作フロー）は、別個独立に実施してもよいし、２以上の動作シーケンス（及び動作フロー）を組み合わせて実施してもよい。例えば、１つの動作フローの一部のステップを他の動作フローに追加してもよいし、１つの動作フローの一部のステップを他の動作フローの一部のステップと置換してもよい。 (Other embodiments)
The operation sequences (and operation flows) in the above-described embodiments do not necessarily have to be executed in chronological order according to the order described in the flow diagrams or sequence diagrams. For example, the steps in the operations may be performed out of order or in parallel with the order illustrated in the flow diagrams or sequence diagrams. Also, some steps in the operation may be omitted and additional steps may be added to the process. Further, the operation sequences (and operation flows) in the above-described embodiments may be implemented independently, or two or more operation sequences (and operation flows) may be combined and implemented. For example, some steps of one operation flow may be added to another operation flow, or some steps of one operation flow may be replaced with some steps of another operation flow.
　上述の実施形態において、移動通信システム１としてＮＲに基づく移動通信システムを例に挙げて説明した。しかしながら、移動通信システム１は、この例に限定されない。移動通信システム１は、ＬＴＥ又は３ＧＰＰ規格の他の世代システム（例えば、第６世代）のいずれかのＴＳに準拠したシステムであってよい。基地局２００は、ＬＴＥにおいてＵＥ１００へ向けたＥ－ＵＴＲＡユーザプレーン及び制御プレーンプロトコル終端を提供するｅＮＢであってよい。移動通信システム１は、３ＧＰＰ規格以外の規格のＴＳに準拠したシステムであってよい。基地局２００は、ＩＡＢ（Ｉｎｔｅｇｒａｔｅｄ　Ａｃｃｅｓｓ　ａｎｄ　Ｂａｃｋｈａｕｌ）ドナー又はＩＡＢノードであってよい。 In the above-described embodiment, the mobile communication system 1 based on NR has been described as an example. However, the mobile communication system 1 is not limited to this example. The mobile communication system 1 may be a TS-compliant system of either LTE or another generation system (eg, 6th generation) of the 3GPP standard. Base station 200 may be an eNB that provides E-UTRA user plane and control plane protocol termination towards UE 100 in LTE. The mobile communication system 1 may be a system conforming to a TS of a standard other than the 3GPP standard. The base station 200 may be an IAB (Integrated Access and Backhaul) donor or an IAB node.
　ＵＥ１００又は基地局２００が行う各処理をコンピュータに実行させるプログラムが提供されてもよい。プログラムは、コンピュータ読取り可能媒体に記録されていてもよい。コンピュータ読取り可能媒体を用いれば、コンピュータにプログラムをインストールすることが可能である。ここで、プログラムが記録されたコンピュータ読取り可能媒体は、非一過性の記録媒体であってもよい。非一過性の記録媒体は、特に限定されるものではないが、例えば、ＣＤ－ＲＯＭやＤＶＤ－ＲＯＭ等の記録媒体であってもよい。また、ＵＥ１００又は基地局２００が行う各処理を実行する回路を集積化し、ＵＥ１００又は基地局２００の少なくとも一部を半導体集積回路（チップセット、ＳｏＣ）として構成してもよい。 A program that causes a computer to execute each process performed by the UE 100 or the base station 200 may be provided. The program may be recorded on a computer readable medium. A computer readable medium allows the installation of the program on the computer. Here, the computer-readable medium on which the program is recorded may be a non-transitory recording medium. The non-transitory recording medium is not particularly limited, but may be, for example, a recording medium such as CD-ROM or DVD-ROM. Also, circuits that execute each process performed by the UE 100 or the base station 200 may be integrated, and at least a part of the UE 100 or the base station 200 may be configured as a semiconductor integrated circuit (chipset, SoC).
　上述の実施形態において、「送信する（ｔｒａｎｓｍｉｔ）」は、送信に使用されるプロトコルスタック内の少なくとも１つのレイヤの処理を行うことを意味してもよく、又は、無線又は有線で信号を物理的に送信することを意味してもよい。或いは、「送信する」は、上記少なくとも１つのレイヤの処理を行うことと、無線又は有線で信号を物理的に送信することとの組合せを意味してもよい。同様に、「受信する（ｒｅｃｅｉｖｅ）」は、受信に使用されるプロトコルスタック内の少なくとも１つのレイヤの処理を行うことを意味してもよく、又は、無線又は有線で信号を物理的に受信することを意味してもよい。或いは、「受信する」は、上記少なくとも１つのレイヤの処理を行うことと、無線又は有線で信号を物理的に受信することとの組合せを意味してもよい。同様に、「取得する（ｏｂｔａｉｎ／ａｃｑｕｉｒｅ）」は、記憶されている情報の中から情報を取得することを意味してもよく、他のノードから受信した情報の中から情報を取得することを意味してもよく、又は、情報を生成することにより当該情報を取得することを意味してもよい。同様に、「～を含む（ｉｎｃｌｕｄｅ）」及び「～を備える（ｃｏｍｐｒｉｓｅ）」は、列挙する項目のみを含むことを意味せず、列挙する項目のみを含んでもよいし、列挙する項目に加えてさらなる項目を含んでもよいことを意味する。同様に、本開示において、「又は（ｏｒ）」は、排他的論理和を意味せず、論理和を意味する。 In the above embodiments, "transmit" may mean performing at least one layer of processing in the protocol stack used for transmission, or physically transmitting the signal wirelessly or by wire. may mean sending to Alternatively, "transmitting" may mean a combination of performing the at least one layer of processing and physically transmitting the signal wirelessly or by wire. Similarly, "receive" may mean performing processing of at least one layer in the protocol stack used for reception, or physically receiving a signal wirelessly or by wire. may mean that Alternatively, "receiving" may mean a combination of performing the at least one layer of processing and physically receiving the signal wirelessly or by wire. Similarly, "obtain/acquire" may mean obtaining information among stored information, and may mean obtaining information among information received from other nodes. Alternatively, it may mean obtaining the information by generating the information. Similarly, "include" and "comprise" are not meant to include only the recited items, and may include only the recited items or in addition to the recited items. Means that it may contain further items. Similarly, in the present disclosure, "or" does not mean exclusive OR, but means logical OR.
　本開示は、実施例に準拠して記述されたが、本開示は当該実施例や構造に限定されるものではないと理解される。本開示は、様々な変形例や均等範囲内の変形をも包含する。加えて、様々な組み合わせや形態、さらには、それらに一要素のみ、それ以上、あるいはそれ以下、を含む他の組み合わせや形態をも、本開示の範疇や思想範囲に入るものである。 Although the present disclosure has been described with reference to examples, it is understood that the present disclosure is not limited to those examples or structures. The present disclosure also includes various modifications and modifications within the equivalent range. In addition, various combinations and configurations, as well as other combinations and configurations, including single elements, more, or less, are within the scope and spirit of this disclosure.
　（付記）
　上述の実施形態に係る特徴について付記する。 (Appendix)
Features of the above-described embodiment will be added.
　（付記１）
　サービングセルである第１セル（Ｃ１）及び前記第１セル（Ｃ１）と同じ周波数に属する第２セル（Ｃ２）を管理する基地局（２００）によって前記第１セル（Ｃ１）及び前記第２セル（Ｃ２）が設定される通信装置（１００）であって、
　前記基地局（２００）からの送信電力制御（ＴＰＣ）コマンドに応じて変化する送信電力調整状態に基づいて上りリンク送信電力を決定する制御部（１２０）と、
　前記決定された上りリンク送信電力で上りリンク送信を行う通信部（１１０）と、を備え、
　前記制御部（１２０）は、前記第２セル（Ｃ２）と対応付けられた前記送信電力調整状態を、前記第１セル（Ｃ１）と対応付けられた前記送信電力調整状態と独立に管理する
　通信装置（１００）。 (Appendix 1)
The first cell (C1) and the second cell (C2) belonging to the same frequency as the serving cell (C1) and the first cell (C1) are managed by the base station (200) that manages the first cell (C1) and the second cell ( A communication device (100) in which C2) is set,
a control unit (120) that determines uplink transmission power based on a transmission power adjustment state that changes according to a transmission power control (TPC) command from the base station (200);
A communication unit (110) that performs uplink transmission with the determined uplink transmission power,
The control unit (120) manages the transmission power adjustment state associated with the second cell (C2) independently of the transmission power adjustment state associated with the first cell (C1). A device (100).
　（付記２）
　前記制御部（１２０）は、前記第２セル（Ｃ２）と対応付けられた前記送信電力調整状態に基づいて、前記第２セル（Ｃ２）に対する前記上りリンク送信電力を決定する
　付記１に記載の通信装置（１００）。 (Appendix 2)
According to appendix 1, the control unit (120) determines the uplink transmission power for the second cell (C2) based on the transmission power adjustment state associated with the second cell (C2). A communication device (100).
　（付記３）
　前記通信部（１１０）は、前記第２セル（Ｃ２）の識別子と前記送信電力調整状態の識別子とを対応付ける対応付け情報を前記第１セル（Ｃ１）から受信し、
　前記制御部（１２０）は、前記対応付け情報に基づいて、前記第２セル（Ｃ２）と対応付けられた前記送信電力調整状態を、前記第１セル（Ｃ１）と対応付けられた前記送信電力調整状態と独立に管理する
　付記１又は２に記載の通信装置（１００）。 (Appendix 3)
The communication unit (110) receives, from the first cell (C1), association information that associates the identifier of the second cell (C2) with the identifier of the transmission power adjustment state,
The control unit (120) converts the transmission power adjustment state associated with the second cell (C2) to the transmission power associated with the first cell (C1) based on the association information. 3. The communication device (100) according to appendix 1 or 2, wherein the adjustment state is managed independently.
　（付記４）
　前記制御部（１２０）は、前記第２セル（Ｃ２）と対応付けられた参照信号リソースを用いて算出されるパスロスにさらに基づいて、前記第２セル（Ｃ２）に対する前記上りリンク送信電力を決定する
　付記２又は３に記載の通信装置（１００）。 (Appendix 4)
The control unit (120) determines the uplink transmission power for the second cell (C2) further based on the path loss calculated using the reference signal resource associated with the second cell (C2). A communication device (100) according to appendix 2 or 3.
　（付記５）
　前記通信部（１１０）は、前記第２セル（Ｃ２）の識別子と前記参照信号リソースの識別子とを対応付ける対応付け情報を前記第１セル（Ｃ１）から受信する
　付記４に記載の通信装置（１００）。 (Appendix 5)
The communication device (100) according to appendix 4, wherein the communication unit (110) receives association information that associates the identifier of the second cell (C2) with the identifier of the reference signal resource from the first cell (C1). ).
　（付記６）
　前記制御部（１２０）は、前記第２セル（Ｃ２）と対応付けられた電力制御パラメータセット設定にさらに基づいて、前記第２セル（Ｃ２）に対する前記上りリンク送信電力を決定する
　付記１乃至５のいずれかに記載の通信装置（１００）。 (Appendix 6)
The control unit (120) determines the uplink transmission power for the second cell (C2) further based on a power control parameter set setting associated with the second cell (C2). A communication device (100) according to any of the preceding claims.
　（付記７）
　前記通信部（１１０）は、前記第２セル（Ｃ２）の識別子と前記電力制御パラメータセット設定の識別子とを対応付ける対応付け情報を前記第１セル（Ｃ１）から受信する
　付記６に記載の通信装置（１００）。 (Appendix 7)
The communication device according to appendix 6, wherein the communication unit (110) receives association information that associates the identifier of the second cell (C2) with the identifier of the power control parameter set configuration from the first cell (C1). (100).
　（付記８）
　前記通信部（１１０）は、前記第２セル（Ｃ２）に対するビーム測定に用いる設定情報と、前記第２セル（Ｃ２）とのデータ通信のための無線リソースに関する設定情報と、を前記第１セル（Ｃ１）から受信し、
　前記通信部（１１０）は、前記設定情報を受信するとともに前記対応付け情報を受信する
　付記３、５、又は７に記載の通信装置（１００）。 (Appendix 8)
The communication unit (110) transmits setting information used for beam measurement for the second cell (C2) and setting information related to radio resources for data communication with the second cell (C2) to the first cell. received from (C1),
The communication device (100) according to appendix 3, 5, or 7, wherein the communication unit (110) receives the setting information and the association information.
　（付記９）
　前記制御部（１２０）は、前記上りリンク送信電力としてサウンディング参照信号（ＳＲＳ）の送信電力を決定する
　付記１乃至８のいずれかに記載の通信装置（１００）。 (Appendix 9)
The communication device (100) according to any one of appendices 1 to 8, wherein the control unit (120) determines transmission power of a sounding reference signal (SRS) as the uplink transmission power.
　（付記１０）
　前記制御部（１２０）は、前記上りリンク送信電力として物理上りリンク制御チャネル（ＰＵＣＣＨ）の送信電力を決定する
　付記１乃至８のいずれかに記載の通信装置（１００）。 (Appendix 10)
The communication device (100) according to any one of appendices 1 to 8, wherein the control unit (120) determines transmission power of a physical uplink control channel (PUCCH) as the uplink transmission power.
　（付記１１）
　前記制御部（１２０）は、前記上りリンク送信電力として物理上りリンク共有チャネル（ＰＵＳＣＨ）の送信電力を決定する
　付記１乃至８のいずれかに記載の通信装置（１００）。 (Appendix 11)
The communication device (100) according to any one of appendices 1 to 8, wherein the control unit (120) determines transmission power of a physical uplink shared channel (PUSCH) as the uplink transmission power.
　（付記１２）
　前記第２セル（Ｃ２）は、前記基地局（２００）の送受信ポイント（ＴＲＰ）により構成され、且つ、物理セル識別子（ＰＣＩ）が前記第１セル（Ｃ１）とは異なる
　付記１乃至１１のいずれかに記載の通信装置（１００）。 (Appendix 12)
The second cell (C2) is composed of a transmit/receive point (TRP) of the base station (200) and has a physical cell identifier (PCI) different from that of the first cell (C1). A communication device (100) according to any one of the preceding claims.
　（付記１３）
　前記第２セル（Ｃ２）は、非サービングセルであり、
　前記通信部（１１０）は、前記第１セル（Ｃ１）を前記サービングセルとして維持しつつ、前記第２セル（Ｃ２）とのデータ通信を行う
　付記１乃至１２のいずれかに記載の通信装置（１００）。 (Appendix 13)
the second cell (C2) is a non-serving cell;
The communication unit (110) performs data communication with the second cell (C2) while maintaining the first cell (C1) as the serving cell. ).
　（付記１４）
　サービングセルである第１セル（Ｃ１）及び前記第１セル（Ｃ１）と同じ周波数に属する第２セル（Ｃ２）を通信装置（１００）に設定する基地局（２００）であって、
　前記第２セル（Ｃ２）の識別子と、前記基地局（２００）からの送信電力制御（ＴＰＣ）コマンドに応じて変化する送信電力調整状態の識別子とを対応付ける対応付け情報を前記第１セル（Ｃ１）において前記通信装置（１００）に送信する送信部（２１１）と、
　前記第２セル（Ｃ２）と対応付けられた前記送信電力調整状態に基づいて決定された上りリンク送信電力で前記通信装置（１００）により行われる上りリンク送信を受信する受信部（２１２）と、を備える
　基地局（２００）。 (Appendix 14)
A base station (200) that sets a first cell (C1) that is a serving cell and a second cell (C2) that belongs to the same frequency as the first cell (C1) in a communication device (100),
The first cell (C1) is associated with the identifier of the second cell (C2) and the identifier of the transmission power adjustment state that changes according to the transmission power control (TPC) command from the base station (200). ), a transmission unit (211) for transmitting to the communication device (100);
a receiving unit (212) for receiving uplink transmission performed by the communication device (100) with uplink transmission power determined based on the transmission power adjustment state associated with the second cell (C2); A base station (200).
　（付記１５）
　サービングセルである第１セル（Ｃ１）及び前記第１セル（Ｃ１）と同じ周波数に属する第２セル（Ｃ２）を管理する基地局（２００）によって前記第１セル（Ｃ１）及び前記第２セル（Ｃ２）が設定される通信装置（１００）で用いる通信方法であって、
　前記第２セル（Ｃ２）と対応付けられた送信電力調整状態を、前記第１セル（Ｃ１）と対応付けられた送信電力調整状態と独立に管理するステップ（Ｓ２２）と、
　前記基地局（２００）からの送信電力制御（ＴＰＣ）コマンドに応じて変化する前記送信電力調整状態に基づいて上りリンク送信電力を決定するステップ（Ｓ２３）と、
　前記決定された上りリンク送信電力で上りリンク送信を行うステップ（Ｓ２４）と、を備える
　通信方法。
  (Appendix 15)
The first cell (C1) and the second cell (C2) belonging to the same frequency as the serving cell (C1) and the first cell (C1) are managed by the base station (200) that manages the first cell (C1) and the second cell ( A communication method used in a communication device (100) in which C2) is set,
managing the transmission power adjustment state associated with the second cell (C2) independently of the transmission power adjustment state associated with the first cell (C1) (S22);
determining (S23) an uplink transmission power based on the transmission power adjustment state that changes in response to a transmission power control (TPC) command from the base station (200);
A step of performing uplink transmission with the determined uplink transmission power (S24). A communication method.

Claims (15)

  1. 　サービングセルである第１セル（Ｃ１）及び前記第１セル（Ｃ１）と同じ周波数に属する第２セル（Ｃ２）を管理する基地局（２００）によって前記第１セル（Ｃ１）及び前記第２セル（Ｃ２）が設定される通信装置（１００）であって、
    　前記基地局（２００）からの送信電力制御（ＴＰＣ）コマンドに応じて変化する送信電力調整状態に基づいて上りリンク送信電力を決定する制御部（１２０）と、
    　前記決定された上りリンク送信電力で上りリンク送信を行う通信部（１１０）と、を備え、
    　前記制御部（１２０）は、前記第２セル（Ｃ２）と対応付けられた前記送信電力調整状態を、前記第１セル（Ｃ１）と対応付けられた前記送信電力調整状態と独立に管理する
    　通信装置（１００）。     The first cell (C1) and the second cell (C2) belonging to the same frequency as the serving cell (C1) and the first cell (C1) are managed by the base station (200) that manages the first cell (C1) and the second cell ( A communication device (100) in which C2) is set,
    a control unit (120) that determines uplink transmission power based on a transmission power adjustment state that changes according to a transmission power control (TPC) command from the base station (200);
    A communication unit (110) that performs uplink transmission with the determined uplink transmission power,
    The control unit (120) manages the transmission power adjustment state associated with the second cell (C2) independently of the transmission power adjustment state associated with the first cell (C1). A device (100).
  2. 　前記制御部（１２０）は、前記第２セル（Ｃ２）と対応付けられた前記送信電力調整状態に基づいて、前記第２セル（Ｃ２）に対する前記上りリンク送信電力を決定する
    　請求項１に記載の通信装置（１００）。     The control unit (120) according to claim 1, wherein the control unit (120) determines the uplink transmission power for the second cell (C2) based on the transmission power adjustment state associated with the second cell (C2). communication device (100).
  3. 　前記通信部（１１０）は、前記第２セル（Ｃ２）の識別子と前記送信電力調整状態の識別子とを対応付ける対応付け情報を前記第１セル（Ｃ１）から受信し、
    　前記制御部（１２０）は、前記対応付け情報に基づいて、前記第２セル（Ｃ２）と対応付けられた前記送信電力調整状態を、前記第１セル（Ｃ１）と対応付けられた前記送信電力調整状態と独立に管理する
    　請求項１に記載の通信装置（１００）。     The communication unit (110) receives, from the first cell (C1), association information that associates the identifier of the second cell (C2) with the identifier of the transmission power adjustment state,
    The control unit (120) converts the transmission power adjustment state associated with the second cell (C2) to the transmission power associated with the first cell (C1) based on the association information. 2. The communication device (100) of claim 1, wherein the adjustment state is managed independently.
  4. 　前記制御部（１２０）は、前記第２セル（Ｃ２）と対応付けられた参照信号リソースを用いて算出されるパスロスにさらに基づいて、前記第２セル（Ｃ２）に対する前記上りリンク送信電力を決定する
    　請求項２に記載の通信装置（１００）。     The control unit (120) determines the uplink transmission power for the second cell (C2) further based on the path loss calculated using the reference signal resource associated with the second cell (C2). A communication device (100) according to claim 2.
  5. 　前記通信部（１１０）は、前記第２セル（Ｃ２）の識別子と前記参照信号リソースの識別子とを対応付ける対応付け情報を前記第１セル（Ｃ１）から受信する
    　請求項４に記載の通信装置（１００）。     The communication device according to claim 4, wherein the communication unit (110) receives from the first cell (C1) association information that associates the identifier of the second cell (C2) with the identifier of the reference signal resource ( 100).
  6. 　前記制御部（１２０）は、前記第２セル（Ｃ２）と対応付けられた電力制御パラメータセット設定にさらに基づいて、前記第２セル（Ｃ２）に対する前記上りリンク送信電力を決定する
    　請求項１に記載の通信装置（１００）。     The control unit (120) determines the uplink transmission power for the second cell (C2) further based on a power control parameter set configuration associated with the second cell (C2). A communication device (100) as described.
  7. 　前記通信部（１１０）は、前記第２セル（Ｃ２）の識別子と前記電力制御パラメータセット設定の識別子とを対応付ける対応付け情報を前記第１セル（Ｃ１）から受信する
    　請求項６に記載の通信装置（１００）。     7. The communication according to claim 6, wherein the communication unit (110) receives from the first cell (C1) association information that associates the identifier of the second cell (C2) with the identifier of the power control parameter set configuration. A device (100).
  8. 　前記通信部（１１０）は、前記第２セル（Ｃ２）に対するビーム測定に用いる設定情報と、前記第２セル（Ｃ２）とのデータ通信のための無線リソースに関する設定情報と、を前記第１セル（Ｃ１）から受信し、
    　前記通信部（１１０）は、前記設定情報を受信するとともに前記対応付け情報を受信する
    　請求項３に記載の通信装置（１００）。     The communication unit (110) transmits setting information used for beam measurement for the second cell (C2) and setting information related to radio resources for data communication with the second cell (C2) to the first cell. received from (C1),
    The communication device (100) according to claim 3, wherein the communication unit (110) receives the setting information and the association information.
  9. 　前記制御部（１２０）は、前記上りリンク送信電力としてサウンディング参照信号（ＳＲＳ）の送信電力を決定する
    　請求項１乃至８のいずれか１項に記載の通信装置（１００）。     The communication device (100) according to any one of claims 1 to 8, wherein the control unit (120) determines transmission power of a Sounding Reference Signal (SRS) as the uplink transmission power.
  10. 　前記制御部（１２０）は、前記上りリンク送信電力として物理上りリンク制御チャネル（ＰＵＣＣＨ）の送信電力を決定する
    　請求項１乃至８のいずれか１項に記載の通信装置（１００）。     The communication device (100) according to any one of claims 1 to 8, wherein the control unit (120) determines transmission power of a physical uplink control channel (PUCCH) as the uplink transmission power.
  11. 　前記制御部（１２０）は、前記上りリンク送信電力として物理上りリンク共有チャネル（ＰＵＳＣＨ）の送信電力を決定する
    　請求項１乃至８のいずれか１項に記載の通信装置（１００）。     The communication device (100) according to any one of claims 1 to 8, wherein the control unit (120) determines transmission power of a physical uplink shared channel (PUSCH) as the uplink transmission power.
  12. 　前記第２セル（Ｃ２）は、前記基地局（２００）の送受信ポイント（ＴＲＰ）により構成され、且つ、物理セル識別子（ＰＣＩ）が前記第１セル（Ｃ１）とは異なる
    　請求項１乃至８のいずれか１項に記載の通信装置（１００）。     9. The method of claims 1 to 8, wherein said second cell (C2) comprises a transmit/receive point (TRP) of said base station (200) and has a physical cell identifier (PCI) different from said first cell (C1). A communication device (100) according to any one of the preceding claims.
  13. 　前記第２セル（Ｃ２）は、非サービングセルであり、
    　前記通信部（１１０）は、前記第１セル（Ｃ１）を前記サービングセルとして維持しつつ、前記第２セル（Ｃ２）とのデータ通信を行う
    　請求項１乃至８のいずれか１項に記載の通信装置（１００）。     the second cell (C2) is a non-serving cell;
    The communication according to any one of claims 1 to 8, wherein the communication unit (110) performs data communication with the second cell (C2) while maintaining the first cell (C1) as the serving cell. A device (100).
  14. 　サービングセルである第１セル（Ｃ１）及び前記第１セル（Ｃ１）と同じ周波数に属する第２セル（Ｃ２）を通信装置（１００）に設定する基地局（２００）であって、
    　前記第２セル（Ｃ２）の識別子と、前記基地局（２００）からの送信電力制御（ＴＰＣ）コマンドに応じて変化する送信電力調整状態の識別子とを対応付ける対応付け情報を前記第１セル（Ｃ１）において前記通信装置（１００）に送信する送信部（２１１）と、
    　前記第２セル（Ｃ２）と対応付けられた前記送信電力調整状態に基づいて決定された上りリンク送信電力で前記通信装置（１００）により行われる上りリンク送信を受信する受信部（２１２）と、を備える
    　基地局（２００）。     A base station (200) that sets a first cell (C1) that is a serving cell and a second cell (C2) that belongs to the same frequency as the first cell (C1) in a communication device (100),
    The first cell (C1) is associated with the identifier of the second cell (C2) and the identifier of the transmission power adjustment state that changes according to the transmission power control (TPC) command from the base station (200). ), a transmission unit (211) for transmitting to the communication device (100);
    a receiving unit (212) for receiving uplink transmission performed by the communication device (100) with uplink transmission power determined based on the transmission power adjustment state associated with the second cell (C2); A base station (200).
  15. 　サービングセルである第１セル（Ｃ１）及び前記第１セル（Ｃ１）と同じ周波数に属する第２セル（Ｃ２）を管理する基地局（２００）によって前記第１セル（Ｃ１）及び前記第２セル（Ｃ２）が設定される通信装置（１００）で用いる通信方法であって、
    　前記第２セル（Ｃ２）と対応付けられた送信電力調整状態を、前記第１セル（Ｃ１）と対応付けられた送信電力調整状態と独立に管理するステップ（Ｓ２２）と、
    　前記基地局（２００）からの送信電力制御（ＴＰＣ）コマンドに応じて変化する前記送信電力調整状態に基づいて上りリンク送信電力を決定するステップ（Ｓ２３）と、
    　前記決定された上りリンク送信電力で上りリンク送信を行うステップ（Ｓ２４）と、を備える
    　通信方法。     The first cell (C1) and the second cell (C2) belonging to the same frequency as the serving cell (C1) and the first cell (C1) are managed by the base station (200) that manages the first cell (C1) and the second cell ( A communication method used in a communication device (100) in which C2) is set,
    managing the transmission power adjustment state associated with the second cell (C2) independently of the transmission power adjustment state associated with the first cell (C1) (S22);
    determining (S23) an uplink transmission power based on the transmission power adjustment state that changes in response to a transmission power control (TPC) command from the base station (200);
    A step of performing uplink transmission with the determined uplink transmission power (S24). A communication method.
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