WO2021095246A1 - Terminal, and communication method - Google Patents

Terminal, and communication method Download PDF

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Publication number
WO2021095246A1
WO2021095246A1 PCT/JP2019/044914 JP2019044914W WO2021095246A1 WO 2021095246 A1 WO2021095246 A1 WO 2021095246A1 JP 2019044914 W JP2019044914 W JP 2019044914W WO 2021095246 A1 WO2021095246 A1 WO 2021095246A1
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WO
WIPO (PCT)
Prior art keywords
base station
terminal
channel access
access method
transmission
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PCT/JP2019/044914
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French (fr)
Japanese (ja)
Inventor
慎也 熊谷
浩樹 原田
聡 永田
Original Assignee
株式会社Ｎｔｔドコモ
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Publication date
Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to PCT/JP2019/044914 priority Critical patent/WO2021095246A1/en
Publication of WO2021095246A1 publication Critical patent/WO2021095246A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/02—Hybrid access

Definitions

  • the present invention relates to a terminal and a communication method in a wireless communication system.
  • NR New Radio
  • LTE Long Term Evolution
  • the frequency band licensed by the telecommunications carrier (operator) (the frequency band different from the licensed band (unlicensed band), unlicensed”
  • the use of carriers (also called unlicensed carriers) and unlicensed CCs (also called unlicensed CCs) is supported.
  • unlicensed bands for example, Wi-Fi (registered trademark) or Bluetooth (registered trademark) can be used2. .4 GHz band, 5 GHz band, 6 GHz band, etc. are assumed.
  • Rel-13 supports carrier aggregation (CA) that integrates licensed band carriers (CC) and unlicensed band carriers (CC). Communication performed using the unlicensed band together with the license band in this way is referred to as License-Assisted Access (LAA).
  • CA carrier aggregation
  • LAA License-Assisted Access
  • a base station device downlink
  • a user terminal uplink
  • another device for example, a base
  • Channel sensing carrier sense
  • LBT Listen Before Talk
  • NR-U for example, a plurality of types of LBT having different parameters related to the uplink transmission operation such as the gap period of the LBT are defined. Therefore, the base station is required to notify the terminal of the parameters required for the uplink transmission operation according to the type of LBT.
  • the present invention has been made in view of the above points, and an object of the present invention is to efficiently signal parameters required for LBT (Listen Before Talk) operation in a wireless communication system.
  • the information indicating the receiving unit that receives the downlink control information instructing the uplink transmission from the base station and the channel access method applied to the uplink transmission included in the downlink control information. Based on this, it has a control unit that interprets a field included in the downlink control information, and a transmission unit that executes the uplink transmission to the base station by applying the channel access method and the parameters that interpret the field.
  • a terminal is provided.
  • parameters required for LBT (Listen Before Talk) operation can be efficiently signaled in a wireless communication system.
  • LTE Long Term Evolution
  • LTE-Advanced LTE-Advanced and later methods (eg, NR) unless otherwise specified.
  • SS Synchronization signal
  • PSS Primary SS
  • SSS Secondary SS
  • PBCH Physical broadcast channel
  • PRACH Physical
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • NR corresponds to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH and the like. However, even if it is a signal used for NR, it is not always specified as "NR-".
  • the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or other system (for example, Flexible Duplex, etc.). Method may be used.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • Method may be used.
  • "configuring" the radio parameter or the like may mean that a predetermined value is set in advance (Pre-configure), or the base station 10 or The radio parameter notified from the terminal 20 may be set.
  • FIG. 1 is a diagram showing a configuration example of a wireless communication system according to the embodiment of the present invention.
  • the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20 as shown in FIG.
  • FIG. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • the physical resources of the radio signal are defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain is defined by the number of subcarriers or the number of resource blocks. May be good.
  • the base station 10 transmits a synchronization signal and system information to the terminal 20. Synchronous signals are, for example, NR-PSS and NR-SSS.
  • the system information is transmitted by, for example, NR-PBCH, and is also referred to as broadcast information. As shown in FIG.
  • the base station 10 transmits a control signal or data to the terminal 20 by DL (Downlink), and receives the control signal or data from the terminal 20 by UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. Further, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. Further, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) by CA (Carrier Aggregation). Further, the terminal 20 may perform communication via the primary cell of the base station 10 by DC (Dual Connectivity) and the primary secondary cell (PSCell: Primary Secondary Cell) of another base station 10.
  • SCell Secondary Cell
  • PCell Primary Cell
  • CA Carrier Aggregation
  • the terminal 20 is a communication device having a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, and a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives a control signal or data from the base station 10 on the DL and transmits the control signal or data to the base station 10 on the UL, thereby providing various types provided by the wireless communication system. Use communication services.
  • M2M Machine-to-Machine
  • FIG. 2 is a diagram for explaining a wireless communication system according to an embodiment of the present invention.
  • FIG. 2 shows a configuration example of a wireless communication system when NR-DC (NR-Dual connectivity) is executed.
  • a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided.
  • the base station 10A and the base station 10B are each connected to the core network 30.
  • the terminal 20 communicates with both the base station 10A and the base station 10B.
  • the cell group provided by the MN base station 10A is called an MCG (Master Cell Group), and the cell group provided by the SN base station 10B is called an SCG (Secondary Cell Group).
  • MCG Master Cell Group
  • SCG Secondary Cell Group
  • the above-mentioned LBT is executed.
  • the base station 10 or the terminal 20 acquires a COT (Channel Occupancy Time) when the LBT result is idle (when the LBT is successful), performs transmission, and when the LBT result is busy (LBT-busy). , Do not send.
  • COT Channel Occupancy Time
  • the wireless communication system in the present embodiment may perform carrier aggregation (CA) operation using unlicensed CC and licensed CC, or perform dual connectivity (DC) operation using unlicensed CC and licensed CC.
  • CA carrier aggregation
  • DC dual connectivity
  • a stand-alone (SA) operation using only an unlicensed CC may be performed.
  • CA, DC, or SA may be performed by any one system of NR and LTE.
  • DC may be performed by at least two of NR, LTE, and other systems.
  • the terminal 20 uses a signal (for example, a Reference Signal (RS) such as Demodulation Reference Signal (DMRS)) in the PDCCH or the group common PDCCH (group common (GC) -PDCCH) for detecting the transmission burst from the base station 10. ) May exist.
  • RS Reference Signal
  • DMRS Demodulation Reference Signal
  • group common PDCCH group common (GC) -PDCCH)
  • the base station 10 may transmit a specific PDCCH (PDCCH or GC-PDCCH) including a specific DMRS notifying the start of the COT at the start of the COT triggered by the base station apparatus.
  • a specific PDCCH (PDCCH or GC-PDCCH) including a specific DMRS notifying the start of the COT at the start of the COT triggered by the base station apparatus.
  • At least one of the specific PDCCH and the specific DMRS may be referred to as a COT start notification signal.
  • the base station 10 transmits a COT start notification signal to one or more terminals 20, and the terminal 20 can recognize the COT when the specific DMRS is detected.
  • FIG. 3 is a diagram for explaining a multi-TTI grant.
  • Release 16NR-U is expected to use a multi-TTI (Transmission Time Interval) grant that schedules multiple PUSCHs across multiple slots / multiple mini-slots with a single DCI (Downlink Control Information).
  • DCI Downlink Control Information
  • scheduling or scheduling
  • the multi-TTI grant schedules a plurality of consecutive PUSCHs that transmit different TBs (Transport blocks).
  • One TB is mapped to one slot or one mini slot and transmitted in one PUSCH.
  • One HARQ (Hybrid automatic repeat request) process is assigned to one PUSCH that transmits the one TB.
  • one DCI For multiple PUSCHs scheduled by one DCI, one DCI signals each NDI (New data indicator) and RV (Redundancy version) PUSCH. Further, the HARQ process ID notified by the DCI is applied to the first scheduled PUSCH, and the HARQ process ID of the subsequent PUSCHs is applied with a value incremented by 1 in the order of PUSCH.
  • NDI New data indicator
  • RV Redundancy version
  • FIG. 3 is a diagram showing an example of the operation of the terminal 20 that has received the multi-TTI grant.
  • the multi-TTI grant schedules PUSCH for 4 slots.
  • the terminal 20 executes the LBT before the slot in which the first PUSCH indicated by A is scheduled, and if the LBT is OK, the terminal 20 transmits data in four consecutive PUSCHs. If the first LBT is NG, the PUSCH indicated by B executes the LBT before the scheduled slot, and if the LBT is OK, data is transmitted in three consecutive PUSCHs. After that, the same processing is performed. If the last PUSCH indicated by D executes LBT before the scheduled slot and it is NG, no transmission is performed.
  • PUSCH scheduling may include multiple slots or minislots containing multiple contiguous PUSCHs, which may include multiple separated TBs, with a single DCI.
  • the DCI signaling a plurality of PUSCHs may include NDI and RV.
  • CBG (Code block group) based retransmission may be supported in a plurality of PUSCH schedulings, and depending on the DCI field, signaling is performed for each one or a plurality of PUSCHs to be retransmitted, for each PUSCH, or for each fixed number of PUSCHs. You may.
  • the HARQ process ID signaled by DCI may be applied to the first scheduled PUSCH or may be incremented by 1 in subsequent PUSCHs.
  • the resource allocation in the time domain in which PUSCH is scheduled may be expanded.
  • the range of the start symbol position and the end symbol position may be expanded, the resource allocation in the continuous time domain may be expanded, a plurality of PUSCHs may be arranged in the first slot, or the terminal may be driven. Multiple start symbol positions may be supported in the COT.
  • the LBT category may be notified as part of a slot format indicator (SFI).
  • SFI slot format indicator
  • Category 1 corresponds to a channel access method that performs immediate transmission after a switching gap. It is used in the case of immediate transmission after a switching gap in the COT acquired by the base station 10.
  • the switching gap from reception to transmission is a gap required for switching between the transmitter and receiver, and does not exceed 16 ⁇ s.
  • Category 2 corresponds to a channel access method that performs LBT without random backoff. The period for sensing whether the channel is idle before performing transmission is fixed. For example, in category 2, 25 ⁇ s LBT may be executed or 16 ⁇ s LBT may be executed.
  • the "channel access method” may be referred to as "LBT type”.
  • Category 3 corresponds to the channel access method of performing LBT using a fixed size contention window with random backoff.
  • the transmitter determines a random number N in the contention window.
  • the size of the contention window is specified by a minimum value and a maximum value N.
  • the size of the category 3 contention window is fixed.
  • the random number N is used in the LBT procedure to determine how long to sense if a channel is idle before performing a transmission.
  • Category 4" corresponds to the channel access method of performing LBT using a variable size contention window with random backoff.
  • the transmitter determines a random number N in the contention window.
  • the size of the contention window is specified by a minimum value and a maximum value N.
  • the size of the category 4 contention window is variable.
  • the random number N is used in the LBT procedure to determine how long to sense if a channel is idle before performing a transmission.
  • category 3 may be included in category 4 as one case of category 4.
  • FIG. 4 is a sequence diagram for explaining an example of signaling in the embodiment of the present invention.
  • the base station 10 may instruct the terminal 20 to transmit a plurality of consecutive PUSCHs, or may set a transmission opportunity. Further, transmission of PUCCH and / or SRS (Sounding Reference Signal) and / or PRACH may be instructed.
  • PUCCH and / or SRS Sounding Reference Signal
  • step S1 the base station 10 notifies the terminal 20 of the settings related to the set grant type 1 or type 2 via higher layer signaling.
  • the set grant type 1 the number of PUSCHs that can be transmitted is set.
  • the base station 10 transmits the DCI including the multi-TTI grant and the configured grant type 2 to the terminal 20 via the PDCCH.
  • the terminal 20 transmits data to the base station 10 via one or a plurality of PUSCHs determined based on the received DCI (S3).
  • the base station 10 may transmit an RRC message to the terminal 20, and the terminal 20 may receive the RRC message.
  • the RRC message may include a SlotFormatCombinationsPerCell information element for each serving cell.
  • the base station 10 may notify the terminal 20 of the RNTI value (referred to as SFI-RNTI) for monitoring the DCI format 2_0.
  • One SlotFormationCombinationsPerCell described in Non-Patent Document 1 includes one or more SlotFormatCombinations and a bit position (positionInDCI) of the SlotFormatCombinationID in DCI format 2_0 for a serving cell set in the terminal 20.
  • positionInDCI bit position of the SlotFormatCombinationID in DCI format 2_0 for a serving cell set in the terminal 20.
  • One SlotFormationCombination includes a SlotFormatCombinationID and slotFormations.
  • SlotFormats is information in which format numbers (any number from 0 to 255) described in Table 11.1.1-1 in Non-Patent Document 3 are arranged by the number of slots.
  • the format number may be called a format index.
  • This number of slots may be a value corresponding to the cycle in which the terminal 20 monitors DCI format 2_0.
  • step S1 the terminal 20 receives the SlotFormatCombinationsPerCell for each serving cell to acquire the correspondence information between the SlotFormatCombination ID and the slot format for each serving cell.
  • the acquired correspondence information is stored in a storage device such as a memory of the terminal 20.
  • step S2 the base station 10 transmits DCI format 2_0 to the terminal 20 by GC-PDCCH (may be PDCCH), and the terminal 20 receives the DCI format 2_0.
  • GC-PDCCH may be PDCCH
  • the DCI format 2_0 described in Non-Patent Document 2 and Non-Patent Document 3 may be used, or the DCI format 2_0 described in Non-Patent Document 2 and Non-Patent Document 3 may be used.
  • DCI format 2_0 modified from may be used.
  • the SlotFormationCombinationID (which may be called SFI-index) for the corresponding serving cell is stored at the bit position notified by the RRC message for each serving cell.
  • the terminal 20 can grasp the slotFormats in the serving cell by reading the SlotFormationCombinationID (SFI-index) at the bit position corresponding to the serving cell.
  • SFI-index SlotFormationCombinationID
  • the format of slot 3 is format 0 and the format of slot 4 is format 1.
  • the base station 10 can notify the terminal 20 whether or not the slot is in the COT acquired by the base station 10 in the time domain.
  • the terminal 20 determines that if the format number of a certain slot in slotForms is a specific number, it is a slot outside the COT acquired by the base station 10, and if the number is other than the specific number, the terminal 20 is a base. It is determined that the slot is in the COT acquired by the station 10.
  • Whether or not the slot is in the COT acquired by the base station 10 may be referred to as a CO time domain structure. Further, by using the DCI format 2_0, the CO frequency domain structure may be notified from the base station 10 to the terminal 20.
  • notification can be paraphrased as “instruction”.
  • the English corresponding to “notify (notification)” may be indication (indication).
  • the terminal 20 can grasp whether or not each slot is in the COT acquired by the base station 10. As an example, in step S3, the terminal 20 executes the category 4 LBT when the UL transmission is performed in the slot outside the COT acquired by the base station 10. This is because it is conceivable that transmission / reception is performed by a device in the vicinity other than the base station 10 outside the COT acquired by the base station 10.
  • the terminal 20 does not know whether or not the LBT should be executed in the UL transmission in the COT acquired by the base station 10 in step S3, and which category should be used when executing the LBT.
  • the terminal 20 determines from the base station 10 whether or not the LBT should be executed in the UL transmission in the COT acquired by the base station 10 in step S3, and which category should be used when executing the LBT. It is conceivable to notify 20.
  • the base station 10 transmits the DCI format 2_0 indicating slotFormats, which is obtained by adding an index indicating the LBT category to the SFI value (slot format number) for each target slot, to the terminal 20.
  • This method is referred to as "option 1".
  • Table 1 is an example of an index showing the LBT category added to the SFI value.
  • the base station 10 includes information indicating whether or not LBT should be executed and which category should be used when executing LBT in the DCI instructing UL transmission. It is also conceivable to transmit the DCI including the above to the terminal 20. This method is referred to as "option 2".
  • the terminal 20 may assume that the slot for UL transmission is in the COT acquired by the base station 10. However, such an assumption is an example. The operation described below may be applied regardless of whether the COT is inside or outside.
  • the LBT gap based on CP extension (Cyclic Prefix extension) is being studied. At least for the CP extension before the dynamically scheduled PUSCH transmission, it may be placed on the symbol preceding the PUSCH allocation notified by SLIV (Start and Length Indicator Value).
  • the supported CP extension period may be 1) -4) below.
  • the delay value N2 from UL grant to PUSCH transmission may be relaxed in consideration of CP extension.
  • the CP extension in a certain SCS may be limited to one symbol or less, or may exceed one symbol.
  • the above CP extension may be applied to other UL transmissions.
  • the number of CP extension periods dynamically signaled by the terminal 20 may be set.
  • the LBT gap based on CP extension may be required in categories other than category 4. That is, in category 4, an LBT gap that does not depend on CP extension may be set.
  • CAPC Channel Access Priority Class
  • Table 2 shows an example of CAPC for UL described in Non-Patent Document 4.
  • m p denotes the slot consecutive periods.
  • CW min, p indicates the smallest contention window.
  • CW max and p indicate the maximum contention window.
  • Tulmcot, p indicates the maximum UL-COT.
  • CW p indicates a contention window.
  • CAPC (p) 1 as shown in Table 2
  • the continuous slot period is 2
  • the minimum contention window is 3
  • the maximum contention window is 7
  • the maximum UL-COT is 2 ms.
  • the allowable contention window size is 3 or 7.
  • CAPC (p) 2 as shown in Table 2, the continuous slot period is 2, the minimum contention window is 7, the maximum contention window is 15, and the maximum UL-COT is 4 ms.
  • the allowable contention window size is 7 or 15.
  • the continuous slot period is 3
  • the minimum contention window is 15
  • the maximum contention window is 1023
  • the maximum UL-COT is 6 ms or
  • the allowable contention window size is 15, 31, 63, 127, 255, 511 or 1023.
  • the continuous slot period is 7
  • the minimum contention window is 15
  • the maximum contention window is 1023
  • the maximum UL-COT is 6 ms or
  • the allowable contention window size is 15, 31, 63, 127, 255, 511 or 1023.
  • the DCI that schedules or triggers the UL transmission received by the terminal 20 in step S2 shown in FIG. 4 may include a CP extension value, and is a 1-bit indicator indicating whether or not the channel access method is category 4. Information may be included, or 2-bit information indicating the CAPC corresponding to the UL transmission may be included.
  • the channel access method to be applied may be determined as in a) b) below.
  • the scheduled or triggered UL transmission is a PUSCH with PUCCH or UCI, or if the scheduled or triggered UL transmission is a PUSCH without SRS or UCI, the duration of the SRS or PUSCH is a predetermined threshold. If the following, the applicable channel access method may be determined to be Category 1.
  • the scheduled or triggered UL transmission is a PUSCH without SRS or UCI and the duration of the SRS or PUSCH exceeds a predetermined threshold, it may be determined that the channel access method applied is Category 2. Furthermore, whether LBT 16 ⁇ s category 2 is applied or LBT 25 ⁇ s category 2 is applied may be implicitly notified by the CP extension value included in the DCI.
  • the fixed bit length is 2 + 1 + 2 bits, that is, 5 bits. Is required, and the overhead increases.
  • the CP extension value is required only when the channel access method is other than category 4, and the CAPC is required only when the channel access method is category 4, and both are information that can be notified by 2 bits.
  • the base station 10 notifies the terminal 20 of information indicating whether or not the channel access method applied to the UL transmission instructed by the DCI is category 4 with one bit included in the DCI.
  • the base station 10 notifies the terminal 20 of the CAPC in the 2-bit field included in the DCI.
  • the base station 10 notifies the terminal 20 of the CP extension value in 2 bits of the same field as the CAPC included in the DCI.
  • FIG. 5 is a flowchart for explaining an operation example of the terminal 20 according to the embodiment of the present invention. A detailed operation example of the terminal 20 in step S2 shown in FIG. 4 will be described below.
  • the terminal 20 receives the DCI.
  • the DCI received by the terminal 20 in step S21 which includes one bit indicating whether or not the channel access method applied to the PUSCH is category 4, is a DCI that schedules the UL grant and RAR instructing the transmission of the PUSCH. It may be.
  • the DCI including one bit indicating whether or not the channel access method applied to the PUCCH received by the terminal 20 in step S2 is category 4 may be a DCI having a DL assertion accompanied by the PUCCH transmission.
  • the DCI including one bit indicating whether or not the channel access method applied to SRS received by the terminal 20 in step S2 is category 4 may be DCI format 0_1, 1_1, 2_3 or the like including the SRS request. .. However, these are examples, and the DCI received in step S21 is not limited to these.
  • step S22 the terminal 20 determines whether or not the channel access method notified by DCI is category 4. If the channel access method notified by DCI is category 4 (YES in S22), the process proceeds to step S23, and if the channel access method notified by DCI is not category 4 (NO in S22), the process proceeds to step S24. That is, the terminal 20 interprets a specific DCI field based on the channel access method notified by DCI.
  • step S23 the terminal 20 acquires CAPC from the DCI field.
  • Table 3 shows the mapping between the field 2 bits of DCI and CAPC when CAPC is notified.
  • the table showing the mapping in Table 3 may be defined in advance, or may be set by, for example, the upper layer signaling in step S1 shown in FIG.
  • step S24 the terminal 20 acquires the CP extension value from the same DCI field referred to in step S23.
  • Table 4 shows the correspondence between the field 2 bits of DCI and the CP extension value when the CP extension value is notified.
  • the table showing the mapping in Table 4 may be defined in advance, or may be set by, for example, the upper layer signaling in step S1 shown in FIG.
  • the value of C1, C2 or C3 may be determined from the TA value and / or SCS applied to the corresponding UL transmission.
  • the interpretation of the DCI field shown in Tables 3 and 4 is an example, and the DCI field may be interpreted by other parameters as necessary based on the channel access method.
  • the terminal 20 can reduce the signaling overhead by acquiring different types of parameters from the same DCI field according to the channel access method applied to UL transmission.
  • the base station 10 and the terminal 20 include a function of carrying out the above-described embodiment.
  • the base station 10 and the terminal 20 may each have only a part of the functions in the embodiment.
  • FIG. 6 is a diagram showing an example of the functional configuration of the base station 10 according to the embodiment of the present invention.
  • the base station 10 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140.
  • the functional configuration shown in FIG. 6 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
  • the transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. Further, the transmission unit 110 transmits a message between network nodes to another network node.
  • the receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring information of, for example, a higher layer from the received signals. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals and the like to the terminal 20. In addition, the receiving unit 120 receives a message between network nodes from another network node.
  • the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20.
  • the content of the setting information is, for example, a setting related to NR-U communication.
  • the control unit 140 controls the UL grant as described in the embodiment.
  • the function unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the function unit related to signal reception in the control unit 140 may be included in the reception unit 120.
  • FIG. 7 is a diagram showing an example of the functional configuration of the terminal 20 according to the embodiment of the present invention.
  • the terminal 20 has a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240.
  • the functional configuration shown in FIG. 7 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
  • the transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
  • the receiving unit 220 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer. Further, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals and the like transmitted from the base station 10. Further, for example, as D2D communication, the transmission unit 210 connects the other terminal 20 to PSCCH (Physical Sidelink Control Channel), PSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel). Etc., and the receiving unit 220 receives PSCCH, PSCH, PSDCH, PSBCH, etc. from the other terminal 20.
  • PSCCH Physical Sidelink Control Channel
  • PSCH Physical Sidelink Shared Channel
  • PSDCH Physical Sidelink Discovery Channel
  • PSBCH Physical Sidelink Broadcast Channel
  • the setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220.
  • the setting unit 230 also stores preset setting information.
  • the content of the setting information is, for example, a setting related to NR-U communication.
  • control unit 240 controls to execute the transmission accompanied by the LBT based on the UL grant.
  • the function unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the function unit related to signal reception in the control unit 240 may be included in the reception unit 220.
  • each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices.
  • the functional block may be realized by combining the software with the one device or the plurality of devices.
  • Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption.
  • broadcasting notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but only these. I can't.
  • a functional block that functions transmission is called a transmitting unit (transmitting unit) or a transmitter (transmitter).
  • transmitting unit transmitting unit
  • transmitter transmitter
  • the base station 10, the terminal 20, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
  • FIG. 8 is a diagram showing an example of the hardware configuration of the base station 10 and the terminal 20 according to the embodiment of the present disclosure.
  • the above-mentioned base station 10 and terminal 20 are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. May be good.
  • the word “device” can be read as a circuit, device, unit, etc.
  • the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
  • the processor 1001 For each function of the base station 10 and the terminal 20, the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, and controls the communication by the communication device 1004. It is realized by controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
  • Processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.
  • CPU Central Processing Unit
  • control unit 140, control unit 240, and the like may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these.
  • a program program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
  • the control unit 140 of the base station 10 shown in FIG. 6 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
  • the control unit 240 of the terminal 20 shown in FIG. 7 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
  • Processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from the network via a telecommunication line.
  • the storage device 1002 is a computer-readable recording medium, and is, for example, by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. It may be configured.
  • the storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu).
  • -It may be composed of at least one of a ray® disc), a smart card, a flash memory (eg, a card, a stick, a key drive), a floppy® disc, a magnetic strip, and the like.
  • the storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 1003.
  • the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission / reception unit may be physically or logically separated from each other in the transmission unit and the reception unit.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
  • the base station 10 and the terminal 20 are hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include, and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the receiving unit that receives the downlink control information instructing the uplink transmission from the base station and the uplink transmission included in the downlink control information. Based on the information indicating the applied channel access method, the control unit that interprets the fields included in the downlink control information, and the uplink transmission by applying the channel access method and the parameters that interpret the fields are performed.
  • a terminal having a transmitter to execute on the base station is provided.
  • the terminal 20 can reduce the signaling overhead by acquiring different types of parameters from the same DCI field according to the channel access method applied to UL transmission. That is, in a wireless communication system, parameters required for LBT (Listen Before Talk) operation can be efficiently signaled.
  • LBT Listen Before Talk
  • the control unit indicates the first parameter in the field when the channel access method is a channel access method that performs LBT (Listen Before Talk) using a variable-sized contention window with random backoff. If the channel access method is not a channel access method that performs LBT using a variable size contention window with random backoff, the field indicates a second parameter different from the first parameter. It may be interpreted as. With this configuration, the terminal 20 can acquire different types of parameters from the same DCI field depending on the channel access method applied to UL transmission.
  • LBT Listen Before Talk
  • the first parameter may be CAPC (Channel Access Priority Class), and the second parameter may be a CP (Cyclic Prefix) extension value.
  • CAPC Channel Access Priority Class
  • CP Cyclic Prefix
  • the information indicating the channel access method is 1 bit long, and the field may be 2 bits long.
  • the terminal 20 can acquire different types of parameters from the same DCI field depending on the channel access method applied to UL transmission to reduce the signaling overhead.
  • a reception procedure for receiving downlink control information instructing uplink transmission from a base station and channel access applied to the uplink transmission included in the downlink control information Based on the information indicating the method, the control procedure for interpreting the field included in the downlink control information, the channel access method, and the parameters interpreting the field are applied to execute the uplink transmission to the base station.
  • a communication method is provided in which the terminal executes the transmission procedure.
  • the terminal 20 can reduce the signaling overhead by acquiring different types of parameters from the same DCI field according to the channel access method applied to UL transmission. That is, in a wireless communication system, parameters required for LBT (Listen Before Talk) operation can be efficiently signaled.
  • LBT Listen Before Talk
  • the boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component.
  • the operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components.
  • the processing order may be changed as long as there is no contradiction.
  • the base station 10 and the terminal 20 have been described with reference to functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof.
  • the software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only memory, respectively. It may be stored in (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. Broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof may be used.
  • RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
  • Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication).
  • system FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), IEEE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize suitable systems and have been extended based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
  • the specific operation performed by the base station 10 in the present specification may be performed by its upper node.
  • various operations performed for communication with the terminal 20 are performed by the base station 10 and other network nodes other than the base station 10 (for example, it is clear that it can be done by at least one of (but not limited to, MME, S-GW, etc.).
  • the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). ..
  • the information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
  • the input / output information and the like may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.
  • the determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example,). , Comparison with a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
  • Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.).
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.
  • wireless technology infrared, microwave, etc.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
  • a channel and a symbol may be a signal (signaling).
  • the signal may be a message.
  • the component carrier CC: Component Carrier
  • CC Component Carrier
  • system and “network” used in this disclosure are used interchangeably.
  • the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented.
  • the radio resource may be one indicated by an index.
  • base station Base Station
  • radio base station base station
  • base station device fixed station
  • NodeB NodeB
  • eNodeB eNodeB
  • GNB gNodeB
  • access point “ transmission point ”,“ reception point ”,“ transmission / reception point ”,“ cell ”,“ sector ”
  • Terms such as “cell group,” “carrier,” and “component carrier” can be used interchangeably.
  • Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
  • the base station can accommodate one or more (for example, three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)).
  • Communication services can also be provided by Remote Radio Head).
  • the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage. Point to.
  • MS Mobile Station
  • UE User Equipment
  • Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
  • the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
  • at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read by the user terminal.
  • the communication between the base station and the user terminal is replaced with the communication between a plurality of terminals 20 (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • Each aspect / embodiment of the present disclosure may be applied to the configuration.
  • the terminal 20 may have the function of the base station 10 described above.
  • words such as "up” and “down” may be read as words corresponding to inter-terminal communication (for example, "side”).
  • an uplink channel, a downlink channel, and the like may be read as a side channel.
  • the user terminal in the present disclosure may be read as a base station.
  • the base station may have the functions of the above-mentioned user terminal.
  • determining and “determining” used in this disclosure may include a wide variety of actions.
  • “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as “judgment” or “decision”.
  • judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access.
  • Accessing (for example, accessing data in memory) may be regarded as "judgment” or “decision”.
  • judgment and “decision” mean that the things such as solving, selecting, choosing, establishing, and comparing are regarded as “judgment” and “decision”. Can include. That is, “judgment” and “decision” may include considering some action as “judgment” and “decision”. Further, “judgment (decision)” may be read as “assuming”, “expecting”, “considering” and the like.
  • connection means any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two “connected” or “combined” elements.
  • the connection or connection between the elements may be physical, logical, or a combination thereof.
  • connection may be read as "access”.
  • the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be “connected” or “coupled” to each other using electromagnetic energies having wavelengths in the microwave and light (both visible and invisible) regions.
  • the reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) depending on the applicable standard.
  • RS Reference Signal
  • Pilot Pilot
  • references to elements using designations such as “first”, “second”, etc. as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.
  • each of the above devices may be replaced with a "part”, a “circuit”, a “device”, or the like.
  • the wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further consist of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
  • the numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel.
  • Numerology includes, for example, subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, wireless frame configuration, and transmitter / receiver.
  • SCS subcarrier spacing
  • TTI Transmission Time Interval
  • At least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
  • the slot may be composed of one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.). Slots may be in time units based on numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain.
  • the mini-slot may also be referred to as a sub-slot.
  • a minislot may consist of a smaller number of symbols than the slot.
  • PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A.
  • the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
  • the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
  • the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
  • one subframe may be called a transmission time interval (TTI), a plurality of consecutive subframes may be called TTI, and one slot or one minislot may be called TTI.
  • TTI transmission time interval
  • the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • the base station schedules each terminal 20 to allocate radio resources (frequency bandwidth that can be used in each terminal 20, transmission power, etc.) in TTI units.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
  • the time interval for example, the number of symbols
  • the transport block, code block, code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
  • TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots and the like.
  • the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
  • the resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
  • the number of subcarriers contained in the RB may be determined based on numerology.
  • the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI.
  • Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
  • One or more RBs include a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.
  • PRB Physical resource block
  • SCG Sub-Carrier Group
  • REG Resource Element Group
  • PRB pair an RB pair, and the like. May be called.
  • the resource block may be composed of one or a plurality of resource elements (RE: Resource Element).
  • RE Resource Element
  • 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
  • Bandwidth part (which may also be called partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a certain neurology in a carrier.
  • the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • One or more BWPs may be set in one carrier for the UE.
  • At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
  • “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
  • the above-mentioned structures such as wireless frames, subframes, slots, mini slots and symbols are merely examples.
  • the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
  • the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be changed in various ways.
  • the term "A and B are different” may mean “A and B are different from each other”.
  • the term may mean that "A and B are different from C”.
  • Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
  • the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.
  • DCI is an example of downlink control information.
  • Category 4 is an example of a channel access method for performing LBT (Listen Before Talk) using a variable-sized contention window with random backoff.
  • Base station 110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 20 Terminal 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

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Abstract

This terminal includes: a receiving unit for receiving, from a base station, downlink control information instructing an uplink transmission; a control unit for interpreting a field contained in the downlink control information on the basis of information, contained in the downlink control information, indicating the channel access method to be applied to the uplink transmission; and a transmitting unit for executing the uplink transmission to the base station by applying the channel access method and a parameter obtained by interpreting the field.

Description

端末及び通信方法Terminal and communication method
　本発明は、無線通信システムにおける端末及び通信方法に関する。 The present invention relates to a terminal and a communication method in a wireless communication system.
　ＬＴＥ（Long Term Evolution）の後継システムであるＮＲ（New Radio）（「５Ｇ」ともいう。）においては、要求条件として、大容量のシステム、高速なデータ伝送速度、低遅延、多数の端末の同時接続、低コスト、省電力等を満たす技術が検討されている。 In NR (New Radio) (also called "5G"), which is the successor system to LTE (Long Term Evolution), the requirements are a large-capacity system, high-speed data transmission speed, low delay, and simultaneous operation of many terminals. Technologies that satisfy connection, low cost, power saving, etc. are being studied.
　また、既存のＬＴＥシステムでは、周波数帯域を拡張するため、通信事業者（オペレータ）に免許された周波数帯域（ライセンスバンド（licensed band）とは異なる周波数帯域（アンライセンスバンド（unlicensed band）、アンライセンスキャリア（unlicensed carrier）、アンライセンスＣＣ（unlicensed CC）ともいう）の利用がサポートされている。アンライセンスバンドとしては、例えば、Ｗｉ－Ｆｉ（登録商標）あるいはＢｌｕｅｔｏｏｔｈ（登録商標）を使用可能な２．４ＧＨｚ帯又は５ＧＨｚ帯、６ＧＨｚ帯などが想定される。 In addition, in the existing LTE system, in order to expand the frequency band, the frequency band licensed by the telecommunications carrier (operator) (the frequency band different from the licensed band (unlicensed band), unlicensed" The use of carriers (also called unlicensed carriers) and unlicensed CCs (also called unlicensed CCs) is supported. As unlicensed bands, for example, Wi-Fi (registered trademark) or Bluetooth (registered trademark) can be used2. .4 GHz band, 5 GHz band, 6 GHz band, etc. are assumed.
　具体的には、Ｒｅｌ－１３では、ライセンスバンドのキャリア（ＣＣ）とアンライセンスバンドのキャリア（ＣＣ）とを統合するキャリアアグリゲーション（Carrier Aggregation：ＣＡ）がサポートされる。このように、ライセンスバンドとともにアンライセンスバンドを用いて行う通信をＬｉｃｅｎｓｅ－Ａｓｓｉｓｔｅｄ　Ａｃｃｅｓｓ（ＬＡＡ）と称する。 Specifically, Rel-13 supports carrier aggregation (CA) that integrates licensed band carriers (CC) and unlicensed band carriers (CC). Communication performed using the unlicensed band together with the license band in this way is referred to as License-Assisted Access (LAA).
　ライセンスバンドとともにアンライセンスバンドを用いて通信を行う無線通信システムでは、基地局装置（下りリンク）及びユーザ端末（上りリンク）は、アンライセンスバンドにおけるデータの送信前に、他の装置（例えば、基地局装置、ユーザ端末、Ｗｉ－Ｆｉ装置など）の送信の有無を確認するためにチャネルのセンシング（キャリアセンス）を行う。センシングの結果、他の装置の送信がないことを確認すると、送信機会を獲得し、送信を行うことができる。この動作はＬＢＴ（Listen Before Talk）と呼ばれる。また、ＮＲにおいて、アンライセンスバンドをサポートするシステムはＮＲ－Ｕシステムと呼ばれる。 In a wireless communication system that communicates with a licensed band using an unlicensed band, a base station device (downlink) and a user terminal (uplink) are placed on another device (for example, a base) before transmitting data in the unlicensed band. Channel sensing (carrier sense) is performed to confirm the presence / absence of transmission of a station device, a user terminal, a Wi-Fi device, etc.). As a result of sensing, if it is confirmed that there is no transmission of other devices, a transmission opportunity can be obtained and transmission can be performed. This operation is called LBT (Listen Before Talk). Further, in NR, a system that supports an unlicensed band is called an NR-U system.
　ＮＲ－Ｕでは、例えば、ＬＢＴのギャップ期間のような上りリンク送信動作に係るパラメータが異なるＬＢＴのタイプが複数定義される。そのため、基地局は、ＬＢＴのタイプに応じて、上りリンク送信動作に必要となるパラメータを端末に通知することが要求される。 In NR-U, for example, a plurality of types of LBT having different parameters related to the uplink transmission operation such as the gap period of the LBT are defined. Therefore, the base station is required to notify the terminal of the parameters required for the uplink transmission operation according to the type of LBT.
　本発明は上記の点に鑑みてなされたものであり、無線通信システムにおいて、ＬＢＴ（Listen Before Talk）動作に必要となるパラメータを効率的にシグナリングすることを目的とする。 The present invention has been made in view of the above points, and an object of the present invention is to efficiently signal parameters required for LBT (Listen Before Talk) operation in a wireless communication system.
　開示の技術によれば、上りリンク送信を指示する下りリンク制御情報を基地局から受信する受信部と、前記下りリンク制御情報に含まれる前記上りリンク送信に適用されるチャネルアクセス方式を示す情報に基づいて、前記下りリンク制御情報に含まれるフィールドを解釈する制御部と、前記チャネルアクセス方式及び前記フィールドを解釈したパラメータを適用して前記上りリンク送信を前記基地局に実行する送信部とを有する端末が提供される。 According to the disclosed technology, the information indicating the receiving unit that receives the downlink control information instructing the uplink transmission from the base station and the channel access method applied to the uplink transmission included in the downlink control information. Based on this, it has a control unit that interprets a field included in the downlink control information, and a transmission unit that executes the uplink transmission to the base station by applying the channel access method and the parameters that interpret the field. A terminal is provided.
　開示の技術によれば、無線通信システムにおいて、ＬＢＴ（Listen Before Talk）動作に必要となるパラメータを効率的にシグナリングすることができる。 According to the disclosed technology, parameters required for LBT (Listen Before Talk) operation can be efficiently signaled in a wireless communication system.
本発明の実施の形態における無線通信システムの構成例を示す図である。It is a figure which shows the structural example of the wireless communication system in embodiment of this invention. 本発明の実施の形態における無線通信システムを説明するための図である。It is a figure for demonstrating the wireless communication system in embodiment of this invention. マルチＴＴＩグラントを説明するための図である。It is a figure for demonstrating the multi-TTI grant. 本発明の実施の形態におけるシグナリングの例を説明するためのシーケンス図である。It is a sequence diagram for demonstrating the example of signaling in embodiment of this invention. 本発明の実施の形態における端末２０の動作例を説明するためのフローチャートである。It is a flowchart for demonstrating the operation example of the terminal 20 in embodiment of this invention. 本発明の実施の形態における基地局１０の機能構成の一例を示す図である。It is a figure which shows an example of the functional structure of the base station 10 in embodiment of this invention. 本発明の実施の形態における端末２０の機能構成の一例を示す図である。It is a figure which shows an example of the functional structure of the terminal 20 in embodiment of this invention. 本発明の実施の形態における基地局１０又は端末２０のハードウェア構成の一例を示す図である。It is a figure which shows an example of the hardware composition of the base station 10 or the terminal 20 in embodiment of this invention.
　以下、図面を参照して本発明の実施の形態を説明する。なお、以下で説明する実施の形態は一例であり、本発明が適用される実施の形態は、以下の実施の形態に限られない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.
　本発明の実施の形態の無線通信システムの動作にあたっては、適宜、既存技術が使用される。ただし、当該既存技術は、例えば既存のＬＴＥであるが、既存のＬＴＥに限られない。また、本明細書で使用する用語「ＬＴＥ」は、特に断らない限り、ＬＴＥ－Ａｄｖａｎｃｅｄ、及び、ＬＴＥ－Ａｄｖａｎｃｅｄ以降の方式（例：ＮＲ）を含む広い意味を有するものとする。 Existing technology is appropriately used in the operation of the wireless communication system according to the embodiment of the present invention. However, the existing technology is, for example, an existing LTE, but is not limited to the existing LTE. Further, the term "LTE" used in the present specification shall have a broad meaning including LTE-Advanced and LTE-Advanced and later methods (eg, NR) unless otherwise specified.
　また、以下で説明する本発明の実施の形態では、既存のＬＴＥで使用されているＳＳ（Synchronization signal）、ＰＳＳ（Primary SS）、ＳＳＳ（Secondary SS）、ＰＢＣＨ（Physical broadcast channel）、ＰＲＡＣＨ（Physical random access channel）、ＰＤＣＣＨ（Physical Downlink Control Channel）、ＰＤＳＣＨ（Physical Downlink Shared Channel）、ＰＵＣＣＨ（Physical Uplink Control Channel）、ＰＵＳＣＨ（Physical Uplink Shared Channel）等の用語を使用する。これは記載の便宜上のためであり、これらと同様の信号、機能等が他の名称で呼ばれてもよい。また、ＮＲにおける上述の用語は、ＮＲ－ＳＳ、ＮＲ－ＰＳＳ、ＮＲ－ＳＳＳ、ＮＲ－ＰＢＣＨ、ＮＲ－ＰＲＡＣＨ等に対応する。ただし、ＮＲに使用される信号であっても、必ずしも「ＮＲ－」と明記しない。 Further, in the embodiment of the present invention described below, SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical) used in the existing LTE. Terms such as random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel) are used. This is for convenience of description, and signals, functions, etc. similar to these may be referred to by other names. Further, the above-mentioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH and the like. However, even if it is a signal used for NR, it is not always specified as "NR-".
　また、本発明の実施の形態において、複信（Duplex）方式は、ＴＤＤ（Time Division Duplex）方式でもよいし、ＦＤＤ（Frequency Division Duplex）方式でもよいし、又はそれ以外（例えば、Flexible Duplex等）の方式でもよい。 Further, in the embodiment of the present invention, the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or other system (for example, Flexible Duplex, etc.). Method may be used.
　また、本発明の実施の形態において、無線パラメータ等が「設定される（Configure）」とは、所定の値が予め設定（Pre-configure）されることであってもよいし、基地局１０又は端末２０から通知される無線パラメータが設定されることであってもよい。 Further, in the embodiment of the present invention, "configuring" the radio parameter or the like may mean that a predetermined value is set in advance (Pre-configure), or the base station 10 or The radio parameter notified from the terminal 20 may be set.
　図１は、本発明の実施の形態における無線通信システムの構成例を示す図である。本発明の実施の形態における無線通信システムは、図１に示されるように、基地局１０及び端末２０を含む。図１には、基地局１０及び端末２０が１つずつ示されているが、これは例であり、それぞれ複数であってもよい。 FIG. 1 is a diagram showing a configuration example of a wireless communication system according to the embodiment of the present invention. The wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20 as shown in FIG. Although FIG. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.
　基地局１０は、１つ以上のセルを提供し、端末２０と無線通信を行う通信装置である。無線信号の物理リソースは、時間領域及び周波数領域で定義され、時間領域はＯＦＤＭ（Orthogonal　Frequency　Division　Multiplexing）シンボル数で定義されてもよいし、周波数領域はサブキャリア数又はリソースブロック数で定義されてもよい。基地局１０は、同期信号及びシステム情報を端末２０に送信する。同期信号は、例えば、ＮＲ－ＰＳＳ及びＮＲ－ＳＳＳである。システム情報は、例えば、ＮＲ－ＰＢＣＨにて送信され、報知情報ともいう。図１に示されるように、基地局１０は、ＤＬ（Downlink）で制御信号又はデータを端末２０に送信し、ＵＬ（Uplink）で制御信号又はデータを端末２０から受信する。基地局１０及び端末２０はいずれも、ビームフォーミングを行って信号の送受信を行うことが可能である。また、基地局１０及び端末２０はいずれも、ＭＩＭＯ（Multiple Input Multiple Output）による通信をＤＬ又はＵＬに適用することが可能である。また、基地局１０及び端末２０はいずれも、ＣＡ（Carrier Aggregation）によるセカンダリセル（SCell:Secondary Cell）及びプライマリセル（PCell:Primary Cell）を介して通信を行ってもよい。さらに、端末２０は、ＤＣ（Dual Connectivity）による基地局１０のプライマリセル及び他の基地局１０のプライマリセカンダリセル（PSCell:Primary Secondary Cell）を介して通信を行ってもよい。 The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of the radio signal are defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain is defined by the number of subcarriers or the number of resource blocks. May be good. The base station 10 transmits a synchronization signal and system information to the terminal 20. Synchronous signals are, for example, NR-PSS and NR-SSS. The system information is transmitted by, for example, NR-PBCH, and is also referred to as broadcast information. As shown in FIG. 1, the base station 10 transmits a control signal or data to the terminal 20 by DL (Downlink), and receives the control signal or data from the terminal 20 by UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. Further, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. Further, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) by CA (Carrier Aggregation). Further, the terminal 20 may perform communication via the primary cell of the base station 10 by DC (Dual Connectivity) and the primary secondary cell (PSCell: Primary Secondary Cell) of another base station 10.
　端末２０は、スマートフォン、携帯電話機、タブレット、ウェアラブル端末、Ｍ２Ｍ（Machine-to-Machine）用通信モジュール等の無線通信機能を備えた通信装置である。図１に示されるように、端末２０は、ＤＬで制御信号又はデータを基地局１０から受信し、ＵＬで制御信号又はデータを基地局１０に送信することで、無線通信システムにより提供される各種通信サービスを利用する。 The terminal 20 is a communication device having a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, and a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives a control signal or data from the base station 10 on the DL and transmits the control signal or data to the base station 10 on the UL, thereby providing various types provided by the wireless communication system. Use communication services.
　図２は、本発明の実施の形態における無線通信システムを説明するための図である。図２は、ＮＲ－ＤＣ（NR-Dual connectivity）が実行される場合における無線通信システムの構成例を示す。図２に示されるように、ＭＮ（Master Node)となる基地局１０Ａと、SN(Secondary Node）となる基地局１０Ｂが備えられる。基地局１０Ａと基地局１０Ｂはそれぞれコアネットワーク３０に接続される。端末２０は基地局１０Ａと基地局１０Ｂの両方と通信を行う。 FIG. 2 is a diagram for explaining a wireless communication system according to an embodiment of the present invention. FIG. 2 shows a configuration example of a wireless communication system when NR-DC (NR-Dual connectivity) is executed. As shown in FIG. 2, a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided. The base station 10A and the base station 10B are each connected to the core network 30. The terminal 20 communicates with both the base station 10A and the base station 10B.
　ＭＮである基地局１０Ａにより提供されるセルグループをＭＣＧ（Master Cell Group）と呼び、ＳＮである基地局１０Ｂにより提供されるセルグループをＳＣＧ（Secondary Cell Group）と呼ぶ。後述する動作は、図１と図２のいずれの構成で行ってもよい。 The cell group provided by the MN base station 10A is called an MCG (Master Cell Group), and the cell group provided by the SN base station 10B is called an SCG (Secondary Cell Group). The operation described later may be performed in any of the configurations shown in FIGS. 1 and 2.
　本実施の形態における無線通信システムでは、前述したＬＢＴが実行される。基地局１０あるいは端末２０は、ＬＢＴ結果がアイドルである場合（ＬＢＴに成功した場合）にＣＯＴ（Channel Occupancy Time）を獲得し、送信を行い、ＬＢＴ結果がビジーである場合（ＬＢＴ－ｂｕｓｙ）に、送信を行わない。 In the wireless communication system in the present embodiment, the above-mentioned LBT is executed. The base station 10 or the terminal 20 acquires a COT (Channel Occupancy Time) when the LBT result is idle (when the LBT is successful), performs transmission, and when the LBT result is busy (LBT-busy). , Do not send.
　本実施の形態における無線通信システムは、アンライセンスＣＣ及びライセンスＣＣを用いるキャリアアグリゲーション（ＣＡ）の動作を行ってもよいし、アンライセンスＣＣ及びライセンスＣＣを用いるデュアルコネクティビティ（ＤＣ）の動作を行ってもよいし、アンライセンスＣＣのみを用いるスタンドアローン（ＳＡ）の動作を行ってもよい。ＣＡ、ＤＣ、又はＳＡは、ＮＲ及びＬＴＥのいずれか１つのシステムによって行われてもよい。ＤＣは、ＮＲ、ＬＴＥ、及び他のシステムの少なくとも２つによって行われてもよい。 The wireless communication system in the present embodiment may perform carrier aggregation (CA) operation using unlicensed CC and licensed CC, or perform dual connectivity (DC) operation using unlicensed CC and licensed CC. Alternatively, a stand-alone (SA) operation using only an unlicensed CC may be performed. CA, DC, or SA may be performed by any one system of NR and LTE. DC may be performed by at least two of NR, LTE, and other systems.
　端末２０は、基地局１０からの送信バーストを検出するための、ＰＤＣＣＨ又はグループ共通ＰＤＣＣＨ（group common(GC)-PDCCH）内の信号（例えば、Demodulation Reference Signal(DMRS)などのReference Signal(RS)）の存在を想定してもよい。 The terminal 20 uses a signal (for example, a Reference Signal (RS) such as Demodulation Reference Signal (DMRS)) in the PDCCH or the group common PDCCH (group common (GC) -PDCCH) for detecting the transmission burst from the base station 10. ) May exist.
　基地局１０は、基地局装置契機のＣＯＴ開始時に、ＣＯＴ開始を通知する特定ＤＭＲＳを含む特定ＰＤＣＣＨ（PDCCH又はGC-PDCCH）を送信してもよい。特定ＰＤＣＣＨ及び特定ＤＭＲＳの少なくとも１つは、ＣＯＴ開始通知信号と呼ばれてもよい。基地局１０は、例えば、ＣＯＴ開始通知信号を１以上の端末２０へ送信し、端末２０は、特定ＤＭＲＳを検出した場合、ＣＯＴを認識することができる。 The base station 10 may transmit a specific PDCCH (PDCCH or GC-PDCCH) including a specific DMRS notifying the start of the COT at the start of the COT triggered by the base station apparatus. At least one of the specific PDCCH and the specific DMRS may be referred to as a COT start notification signal. For example, the base station 10 transmits a COT start notification signal to one or more terminals 20, and the terminal 20 can recognize the COT when the specific DMRS is detected.
　図３は、マルチＴＴＩグラントを説明するための図である。リリース１６ＮＲ－Ｕでは、１つのＤＣＩ（Downlink Control Information）で複数スロット／複数ミニスロットに渡って複数のＰＵＳＣＨをスケジューリングするマルチＴＴＩ（Transmission Time Interval）グラントを使用することが想定されている。なお、「スケジューリングする（あるいはスケジュールする）」を「割り当てる」に言い換えてもよい。 FIG. 3 is a diagram for explaining a multi-TTI grant. Release 16NR-U is expected to use a multi-TTI (Transmission Time Interval) grant that schedules multiple PUSCHs across multiple slots / multiple mini-slots with a single DCI (Downlink Control Information). In addition, "scheduling (or scheduling)" may be paraphrased as "assign".
　マルチＴＴＩグラントにより、別々のＴＢ（Transport block、トランスポートブロック）を送信する連続する複数のＰＵＳＣＨがスケジューリングされる。１つのＴＢは、１つのスロット又は１つのミニスロットにマッピングされ、１つのＰＵＳＣＨで送信される。当該１つのＴＢを送信する１つのＰＵＳＣＨには１つのＨＡＲＱ（Hybrid automatic repeat request）プロセスが割り当てられる。 The multi-TTI grant schedules a plurality of consecutive PUSCHs that transmit different TBs (Transport blocks). One TB is mapped to one slot or one mini slot and transmitted in one PUSCH. One HARQ (Hybrid automatic repeat request) process is assigned to one PUSCH that transmits the one TB.
　１つのＤＣＩによりスケジューリングされる複数ＰＵＳＣＨについて、１つのＤＣＩにより、ＮＤＩ（New data indicator）とＲＶ（Redundancy version）ＰＵＳＣＨ毎にシグナリングされる。また、当該ＤＣＩにより通知されたＨＡＲＱプロセスＩＤについては、スケジュールされた最初のＰＵＳＣＨに適用され、以降のＰＵＳＣＨのＨＡＲＱプロセスＩＤについては、ＰＵＳＣＨの順番で１ずつインクリメントされた値が適用される。 For multiple PUSCHs scheduled by one DCI, one DCI signals each NDI (New data indicator) and RV (Redundancy version) PUSCH. Further, the HARQ process ID notified by the DCI is applied to the first scheduled PUSCH, and the HARQ process ID of the subsequent PUSCHs is applied with a value incremented by 1 in the order of PUSCH.
　図３は、マルチＴＴＩグラントを受信した端末２０の動作の一例を示す図である。図３の例では、マルチＴＴＩグラントにより、４スロット分のＰＵＳＣＨがスケジューリングされる。 FIG. 3 is a diagram showing an example of the operation of the terminal 20 that has received the multi-TTI grant. In the example of FIG. 3, the multi-TTI grant schedules PUSCH for 4 slots.
　端末２０は、Ａで示す最初のＰＵＳＣＨがスケジューリングされたスロットの手前でＬＢＴを実行し、そのＬＢＴがＯＫであれば４つの連続するＰＵＳＣＨでデータを送信する。もしも最初のＬＢＴがＮＧである場合、Ｂで示すＰＵＳＣＨがスケジューリングされたスロットの手前でＬＢＴを実行し、そのＬＢＴがＯＫであれば３つの連続するＰＵＳＣＨでデータを送信する。以降、同様の処理が行われる。もしも、Ｄで示す最後のＰＵＳＣＨがスケジューリングされたスロットの手前でＬＢＴを実行し、それがＮＧである場合、送信は行われない。 The terminal 20 executes the LBT before the slot in which the first PUSCH indicated by A is scheduled, and if the LBT is OK, the terminal 20 transmits data in four consecutive PUSCHs. If the first LBT is NG, the PUSCH indicated by B executes the LBT before the scheduled slot, and if the LBT is OK, data is transmitted in three consecutive PUSCHs. After that, the same processing is performed. If the last PUSCH indicated by D executes LBT before the scheduled slot and it is NG, no transmission is performed.
　例えば、ＰＵＳＣＨスケジューリングは、分離された複数のＴＢを含んでもよい複数の連続したＰＵＳＣＨを含む複数のスロット又はミニスロットが１つのＤＣＩによってサポートされてもよい。また、例えば、複数のＰＵＳＣＨをシグナリングするＤＣＩは、ＮＤＩ及びＲＶを含んでもよい。また、例えば、ＣＢＧ（Code block group）ベースの再送が複数のＰＵＳＣＨスケジューリングにおいてサポートされてもよく、ＤＣＩのフィールドによって、再送する１又は複数のＰＵＳＣＨごと、ＰＵＳＣＨごと又は固定数のＰＵＳＣＨごとにシグナリングされてもよい。また、例えば、ＤＣＩによりシグナリングされるＨＡＲＱプロセスＩＤは、最初にスケジューリングされたＰＵＳＣＨに適用されてもよく、続くＰＵＳＣＨにおいて１ずつインクリメントされてもよい。 For example, PUSCH scheduling may include multiple slots or minislots containing multiple contiguous PUSCHs, which may include multiple separated TBs, with a single DCI. Further, for example, the DCI signaling a plurality of PUSCHs may include NDI and RV. Further, for example, CBG (Code block group) based retransmission may be supported in a plurality of PUSCH schedulings, and depending on the DCI field, signaling is performed for each one or a plurality of PUSCHs to be retransmitted, for each PUSCH, or for each fixed number of PUSCHs. You may. Also, for example, the HARQ process ID signaled by DCI may be applied to the first scheduled PUSCH or may be incremented by 1 in subsequent PUSCHs.
　また、例えば、ＰＵＳＣＨがスケジュールされる時間領域のリソース割り当てが拡張されてもよい。例えば、開始シンボル位置及び終了シンボル位置の範囲が拡張されてもよいし、連続する時間領域のリソース割り当てが拡張されてもよいし、先頭スロットにおいて複数のＰＵＳＣＨが配置されてもよいし、端末主導のＣＯＴにおいて複数の開始シンボル位置がサポートされてもよい。 Further, for example, the resource allocation in the time domain in which PUSCH is scheduled may be expanded. For example, the range of the start symbol position and the end symbol position may be expanded, the resource allocation in the continuous time domain may be expanded, a plurality of PUSCHs may be arranged in the first slot, or the terminal may be driven. Multiple start symbol positions may be supported in the COT.
　また、ＮＲ－Ｕでは、基地局１０が獲得したＣＯＴ内において端末２０が送信する上りリンク信号に適用するＬＢＴカテゴリの通知方法が検討されている。例えば、ＬＢＴカテゴリは、スロットフォーマットインジケータ（ＳＦＩ：slot format indicator）の一部として通知されてもよい。ＬＢＴカテゴリとは、例えば、以下のように定義されてもよい。 Further, in NR-U, a notification method of the LBT category applied to the uplink signal transmitted by the terminal 20 in the COT acquired by the base station 10 is being studied. For example, the LBT category may be notified as part of a slot format indicator (SFI). The LBT category may be defined as follows, for example.
　「カテゴリ１」は、スイッチングギャップの後、即時送信を行うチャネルアクセス方法に対応する。基地局１０が獲得したＣＯＴ内において、スイッチングギャップの後、即時送信をする場合に使用される。受信から送信へのスイッチングギャップは、送受信機の切り替えに要するギャップであり、１６μｓを超えない。 "Category 1" corresponds to a channel access method that performs immediate transmission after a switching gap. It is used in the case of immediate transmission after a switching gap in the COT acquired by the base station 10. The switching gap from reception to transmission is a gap required for switching between the transmitter and receiver, and does not exceed 16 μs.
　「カテゴリ２」は、ランダムバックオフを伴わないＬＢＴを行うチャネルアクセス方法に対応する。送信を実行する前にチャネルがアイドルであるかをセンシングする期間は、確定している。例えば、カテゴリ２では、２５μｓのＬＢＴが実行されてもよいし、１６μｓのＬＢＴが実行されてもよい。なお、「チャネルアクセス方法」は、「ＬＢＴタイプ」と呼ばれてもよい。 "Category 2" corresponds to a channel access method that performs LBT without random backoff. The period for sensing whether the channel is idle before performing transmission is fixed. For example, in category 2, 25 μs LBT may be executed or 16 μs LBT may be executed. The "channel access method" may be referred to as "LBT type".
　「カテゴリ３」は、ランダムバックオフを伴い、固定サイズのコンテンションウィンドウを使用するＬＢＴを行うチャネルアクセス方法に対応する。カテゴリ３のＬＢＴ手順において、送信機はコンテンションウィンドウ内でランダムナンバＮを決定する。コンテンションウィンドウのサイズは、最小値と、最大値Ｎとで特定される。カテゴリ３のコンテンションウィンドウのサイズは固定である。ランダムナンバＮは、ＬＢＴ手順において、送信を実行する前にチャネルがアイドルであるかをセンシングする期間の決定に使用される。 "Category 3" corresponds to the channel access method of performing LBT using a fixed size contention window with random backoff. In the category 3 LBT procedure, the transmitter determines a random number N in the contention window. The size of the contention window is specified by a minimum value and a maximum value N. The size of the category 3 contention window is fixed. The random number N is used in the LBT procedure to determine how long to sense if a channel is idle before performing a transmission.
　「カテゴリ４」は、ランダムバックオフを伴い、可変サイズのコンテンションウィンドウを使用するＬＢＴを行うチャネルアクセス方法に対応する。カテゴリ４のＬＢＴ手順において、送信機はコンテンションウィンドウ内でランダムナンバＮを決定する。コンテンションウィンドウのサイズは、最小値と、最大値Ｎとで特定される。カテゴリ４のコンテンションウィンドウのサイズは可変である。ランダムナンバＮは、ＬＢＴ手順において、送信を実行する前にチャネルがアイドルであるかをセンシングする期間の決定に使用される。なお、カテゴリ３は、カテゴリ４の一つのケースとしてカテゴリ４に包含されてもよい。 "Category 4" corresponds to the channel access method of performing LBT using a variable size contention window with random backoff. In the category 4 LBT procedure, the transmitter determines a random number N in the contention window. The size of the contention window is specified by a minimum value and a maximum value N. The size of the category 4 contention window is variable. The random number N is used in the LBT procedure to determine how long to sense if a channel is idle before performing a transmission. In addition, category 3 may be included in category 4 as one case of category 4.
　図４は、本発明の実施の形態におけるシグナリングの例を説明するためのシーケンス図である。基地局１０は、端末２０に対して、複数の連続したＰＵＳＣＨの送信を指示するか、又は送信機会を設定してもよい。また、ＰＵＣＣＨ及び／又はＳＲＳ（Sounding Reference Signal）及び／又はＰＲＡＣＨの送信を指示してもよい。 FIG. 4 is a sequence diagram for explaining an example of signaling in the embodiment of the present invention. The base station 10 may instruct the terminal 20 to transmit a plurality of consecutive PUSCHs, or may set a transmission opportunity. Further, transmission of PUCCH and / or SRS (Sounding Reference Signal) and / or PRACH may be instructed.
　ステップＳ１において、基地局１０は、上位レイヤシグナリングを介して、設定済グラントタイプ１又はタイプ２に係る設定を端末２０に通知する。例えば、設定済グラントタイプ１では、送信可能なＰＵＳＣＨの数が設定される。例えば、マルチＴＴＩグラント及び設定済グラントタイプ２では、ＤＣＩでスケジュールするか又は送信可能なＰＵＳＣＨの数が設定される。ステップＳ２において、基地局１０は、ＰＤＣＣＨを介して、マルチＴＴＩグラント及び設定済グラントタイプ２を含むＤＣＩを端末２０に送信する。続いて、端末２０は、受信したＤＣＩに基づいて決定した１又は複数のＰＵＳＣＨを介して基地局１０にデータを送信する（Ｓ３）。 In step S1, the base station 10 notifies the terminal 20 of the settings related to the set grant type 1 or type 2 via higher layer signaling. For example, in the set grant type 1, the number of PUSCHs that can be transmitted is set. For example, in a multi-TTI grant and a configured grant type 2, the number of PUSCHs that can be scheduled or transmitted by DCI is set. In step S2, the base station 10 transmits the DCI including the multi-TTI grant and the configured grant type 2 to the terminal 20 via the PDCCH. Subsequently, the terminal 20 transmits data to the base station 10 via one or a plurality of PUSCHs determined based on the received DCI (S3).
　また、ステップＳ１において、基地局１０はＲＲＣメッセージを端末２０に送信し、端末２０は当該ＲＲＣメッセージを受信してもよい。当該ＲＲＣメッセージには、サービングセルごとのＳｌｏｔＦｏｒｍａｔＣｏｍｂｉｎａｔｉｏｎｓＰｅｒＣｅｌｌ情報要素が含まれてもよい。ステップＳ１において、基地局１０から端末２０に対して、ＤＣＩフォーマット２＿０をモニタするためのＲＮＴＩ値（ＳＦＩ－ＲＮＴＩと呼ぶ）が通知されてもよい。 Further, in step S1, the base station 10 may transmit an RRC message to the terminal 20, and the terminal 20 may receive the RRC message. The RRC message may include a SlotFormatCombinationsPerCell information element for each serving cell. In step S1, the base station 10 may notify the terminal 20 of the RNTI value (referred to as SFI-RNTI) for monitoring the DCI format 2_0.
　非特許文献１に記載の１つのＳｌｏｔＦｏｒｍａｔＣｏｍｂｉｎａｔｉｏｎｓＰｅｒＣｅｌｌには、端末２０に設定されるあるサービングセルについて、１つ以上のＳｌｏｔＦｏｒｍａｔＣｏｍｂｉｎａｔｉｏｎと、ＳｌｏｔＦｏｒｍａｔＣｏｍｂｉｎａｔｉｏｎＩＤのＤＣＩフォーマット２＿０におけるビット位置（ｐｏｓｉｔｉｏｎＩｎＤＣＩ）が含まれる。 One SlotFormationCombinationsPerCell described in Non-Patent Document 1 includes one or more SlotFormatCombinations and a bit position (positionInDCI) of the SlotFormatCombinationID in DCI format 2_0 for a serving cell set in the terminal 20.
　１つのＳｌｏｔＦｏｒｍａｔＣｏｍｂｉｎａｔｉｏｎには、ＳｌｏｔＦｏｒｍａｔＣｏｍｂｉｎａｔｉｏｎＩＤと、ｓｌｏｔＦｏｒｍａｔｓが含まれる。ｓｌｏｔＦｏｒｍａｔｓは、非特許文献３におけるＴａｂｌｅ　１１．１．１－１に記載のフォーマット番号（０から２５５のいずれかの番号）を、スロット数分だけ並べた情報である。なお、フォーマット番号をフォーマットインデックスと呼んでもよい。このスロット数は、端末２０がＤＣＩフォーマット２＿０をモニタする周期に相当する値であってもよい。 One SlotFormationCombination includes a SlotFormatCombinationID and slotFormations. SlotFormats is information in which format numbers (any number from 0 to 255) described in Table 11.1.1-1 in Non-Patent Document 3 are arranged by the number of slots. The format number may be called a format index. This number of slots may be a value corresponding to the cycle in which the terminal 20 monitors DCI format 2_0.
　ステップＳ１において、端末２０は、サービングセルごとのＳｌｏｔＦｏｒｍａｔＣｏｍｂｉｎａｔｉｏｎｓＰｅｒＣｅｌｌを受信することで、サービングセルごとに、ＳｌｏｔＦｏｒｍａｔＣｏｍｂｉｎａｔｉｏｎＩＤとスロットフォーマットとの対応情報を取得する。取得した対応情報は、端末２０が持つメモリ等の記憶装置に格納される。 In step S1, the terminal 20 receives the SlotFormatCombinationsPerCell for each serving cell to acquire the correspondence information between the SlotFormatCombination ID and the slot format for each serving cell. The acquired correspondence information is stored in a storage device such as a memory of the terminal 20.
　また、ステップＳ２において、基地局１０はＤＣＩフォーマット２＿０をＧＣ－ＰＤＣＣＨ（ＰＤＣＣＨでもよい）で端末２０に送信し、端末２０は当該ＤＣＩフォーマット２＿０を受信する。 Further, in step S2, the base station 10 transmits DCI format 2_0 to the terminal 20 by GC-PDCCH (may be PDCCH), and the terminal 20 receives the DCI format 2_0.
　本実施の形態におけるＤＣＩフォーマット２＿０として、非特許文献２及び非特許文献３に記載されたＤＣＩフォーマット２＿０を使用してもよいし、非特許文献２及び非特許文献３に記載されたＤＣＩフォーマット２＿０から修正されたＤＣＩフォーマット２＿０を使用してもよい。 As the DCI format 2_0 in the present embodiment, the DCI format 2_0 described in Non-Patent Document 2 and Non-Patent Document 3 may be used, or the DCI format 2_0 described in Non-Patent Document 2 and Non-Patent Document 3 may be used. DCI format 2_0 modified from may be used.
　ＤＣＩフォーマット２＿０には、サービングセルごとにＲＲＣメッセージで通知されたビット位置に、該当サービングセルに対するＳｌｏｔＦｏｒｍａｔＣｏｍｂｉｎａｔｉｏｎＩＤ（ＳＦＩ－ｉｎｄｅｘと呼んでもよい）が格納されている。 In the DCI format 2_0, the SlotFormationCombinationID (which may be called SFI-index) for the corresponding serving cell is stored at the bit position notified by the RRC message for each serving cell.
　端末２０は、あるサービングセルに対応するビット位置におけるＳｌｏｔＦｏｒｍａｔＣｏｍｂｉｎａｔｉｏｎＩＤ（ＳＦＩ－ｉｎｄｅｘ）を読むことで、当該サービングセルにおけるｓｌｏｔＦｏｒｍａｔｓを把握できる。 The terminal 20 can grasp the slotFormats in the serving cell by reading the SlotFormationCombinationID (SFI-index) at the bit position corresponding to the serving cell.
　例えば、端末２０が、スロット１の先頭部分でＤＣＩフォーマット２＿０を受信し、ＳｌｏｔＦｏｒｍａｔＣｏｍｂｉｎａｔｉｏｎＩＤ＝２を読み出したとする。端末２０は、ＲＲＣでの設定に基づき、ＳｌｏｔＦｏｒｍａｔＣｏｍｂｉｎａｔｉｏｎＩＤ＝２が｛０，１，０，１｝であることを把握すると、端末２０は、スロット１のフォーマットがフォーマット０、スロット２のフォーマットがフォーマット１、スロット３のフォーマットがフォーマット０、スロット４のフォーマットがフォーマット１であることを把握できる。 For example, suppose that the terminal 20 receives the DCI format 2_0 at the beginning of the slot 1 and reads out the SlotFormatCombinationID = 2. When the terminal 20 grasps that the SlotFormationCombinationID = 2 is {0,1,0,1} based on the setting in the RRC, the terminal 20 has the format 0 in the slot 1 and the format 1 in the slot 2. , It can be grasped that the format of slot 3 is format 0 and the format of slot 4 is format 1.
　本実施の形態では、ＤＣＩフォーマット２＿０を用いることで、基地局１０から端末２０に対し、時間ドメインにおいてスロットが基地局１０が獲得したＣＯＴ内であるか否かを通知することもできる。一例として、端末２０は、ｓｌｏｔＦｏｒｍａｔｓにおけるあるスロットのフォーマット番号が特定の番号であれば、基地局１０が獲得したＣＯＴの外側のスロットであると判断し、特定の番号以外の番号であれば、基地局１０が獲得したＣＯＴ内のスロットであると判断する。 In the present embodiment, by using the DCI format 2_0, the base station 10 can notify the terminal 20 whether or not the slot is in the COT acquired by the base station 10 in the time domain. As an example, the terminal 20 determines that if the format number of a certain slot in slotForms is a specific number, it is a slot outside the COT acquired by the base station 10, and if the number is other than the specific number, the terminal 20 is a base. It is determined that the slot is in the COT acquired by the station 10.
　スロットが基地局１０が獲得したＣＯＴ内であるか否かを、ＣＯ時間ドメイン構造と呼んでもよい。更に、ＤＣＩフォーマット２＿０を用いることで、基地局１０から端末２０に対し、ＣＯ周波数ドメイン構造が通知されることとしてもよい。 Whether or not the slot is in the COT acquired by the base station 10 may be referred to as a CO time domain structure. Further, by using the DCI format 2_0, the CO frequency domain structure may be notified from the base station 10 to the terminal 20.
　なお、本明細書において、「通知」を「指示」と言い換えることもできる。また、「通知する（通知）」に対応する英語がｉｎｄｉｃａｔｅ（ｉｎｄｉｃａｔｉｏｎ）であってもよい。 In this specification, "notification" can be paraphrased as "instruction". In addition, the English corresponding to "notify (notification)" may be indication (indication).
　前述したＣＯＴ構造通知により、端末２０は、各スロットが、基地局１０により獲得されたＣＯＴ内かどうかを把握することができる。一例として、ステップＳ３において、端末２０は、基地局１０が獲得したＣＯＴ外のスロットでＵＬ送信を行う場合において、カテゴリ４のＬＢＴを実行する。基地局１０が獲得したＣＯＴ外では、基地局１０以外の近傍の装置による送受信が行われることが考えられるからである。 From the above-mentioned COT structure notification, the terminal 20 can grasp whether or not each slot is in the COT acquired by the base station 10. As an example, in step S3, the terminal 20 executes the category 4 LBT when the UL transmission is performed in the slot outside the COT acquired by the base station 10. This is because it is conceivable that transmission / reception is performed by a device in the vicinity other than the base station 10 outside the COT acquired by the base station 10.
　しかしながら、端末２０は、ステップＳ３における基地局１０が獲得したＣＯＴ内のＵＬ送信において、ＬＢＴを実行すべきかどうか、ＬＢＴを実行する場合にはどのカテゴリを用いればよいのかがわからない。 However, the terminal 20 does not know whether or not the LBT should be executed in the UL transmission in the COT acquired by the base station 10 in step S3, and which category should be used when executing the LBT.
　そこで、端末２０が、ステップＳ３における基地局１０が獲得したＣＯＴ内のＵＬ送信において、ＬＢＴを実行すべきかどうか、ＬＢＴを実行する場合にはどのカテゴリを用いればよいのかを、基地局１０から端末２０に通知することが考えられる。 Therefore, the terminal 20 determines from the base station 10 whether or not the LBT should be executed in the UL transmission in the COT acquired by the base station 10 in step S3, and which category should be used when executing the LBT. It is conceivable to notify 20.
　例えば、基地局１０は、対象のスロット毎のＳＦＩ値（スロットフォーマット番号）に、ＬＢＴカテゴリを示すインデックスを付加したｓｌｏｔＦｏｒｍａｔｓを指示するＤＣＩフォーマット２＿０を端末２０に送信することが考えられる。この方法を「オプション１」とする。表１は、ＳＦＩ値に付加されるＬＢＴカテゴリを示すインデックスの一例である。 For example, it is conceivable that the base station 10 transmits the DCI format 2_0 indicating slotFormats, which is obtained by adding an index indicating the LBT category to the SFI value (slot format number) for each target slot, to the terminal 20. This method is referred to as "option 1". Table 1 is an example of an index showing the LBT category added to the SFI value.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　例えば、端末２０が、あるスロットに対して、表１に示されるインデックス＝１を指定したｓｌｏｔＦｏｒｍａｔｓを指示するＤＣＩフォーマット２＿０を受信した場合、端末２０は、当該スロットにおいて、カテゴリ２の２５μｓのＬＢＴを実施してからＵＬ送信を実行する。 For example, when the terminal 20 receives a DCI format 2_0 indicating slotFormats with the index = 1 specified in Table 1 for a certain slot, the terminal 20 receives a category 2 25 μs LBT in the slot. After that, UL transmission is executed.
　上記の方法の他、基地局１０が、ＵＬ送信を指示するＤＣＩの中に、ＬＢＴを実行すべきかどうか、ＬＢＴを実行する場合にはどのカテゴリを用いればよいのかを示す情報を含め、当該情報を含むＤＣＩを端末２０に送信することも考えられる。この方法を「オプション２」とする。 In addition to the above method, the base station 10 includes information indicating whether or not LBT should be executed and which category should be used when executing LBT in the DCI instructing UL transmission. It is also conceivable to transmit the DCI including the above to the terminal 20. This method is referred to as "option 2".
　なお、以下の例では、ＵＬ送信においてＬＢＴタイプとしてカテゴリ４が通知される場合、当該ＵＬ送信のスロットは基地局１０が獲得したＣＯＴ外にあり、ＵＬ送信においてＬＢＴタイプとしてカテゴリ４が通知されない場合、当該ＵＬ送信のスロットは基地局１０が獲得したＣＯＴ内にあると端末２０は想定してもよい。ただし、このような想定は一例である。ＣＯＴの内外に関わらずに、以下で説明する動作が適用されてもよい。 In the following example, when category 4 is notified as the LBT type in UL transmission, the slot of the UL transmission is outside the COT acquired by the base station 10, and category 4 is not notified as the LBT type in UL transmission. The terminal 20 may assume that the slot for UL transmission is in the COT acquired by the base station 10. However, such an assumption is an example. The operation described below may be applied regardless of whether the COT is inside or outside.
　また、ＮＲ－Ｕでは、ＣＰ延長（Cyclic Prefix extension）に基づくＬＢＴギャップが検討されている。少なくとも動的にスケジューリングされるＰＵＳＣＨ送信の前のＣＰ延長について、ＳＬＩＶ（Start and Length Indicator Value）により通知されたＰＵＳＣＨ割り当てに先行するシンボルに配置されてもよい。サポートされるＣＰ延長の期間は、以下の１）－４）であってもよい。 Also, in NR-U, the LBT gap based on CP extension (Cyclic Prefix extension) is being studied. At least for the CP extension before the dynamically scheduled PUSCH transmission, it may be placed on the symbol preceding the PUSCH allocation notified by SLIV (Start and Length Indicator Value). The supported CP extension period may be 1) -4) below.
１）０（すなわち、ＣＰ延長されない）
２）Ｃ１×シンボル長－２５μｓ
３）Ｃ２×シンボル長－１６μｓ－ＴＡ（Timing Alignment）
４）Ｃ３×シンボル長－２５μｓ－ＴＡ 1) 0 (that is, CP is not extended)
2) C1 x symbol length -25 μs
3) C2 x symbol length-16 μs-TA (Timing Alignment)
4) C3 x symbol length -25 μs-TA
　上記のＣ１、Ｃ２及びＣ３は、ＳＣＳ（SubCarrier spacing）に応じて設定される値であってもよい。例えば、ＳＣＳが１５ｋＨｚ又は３０ｋＨｚの場合、Ｃ１＝１としてもよい。また、例えば、ＳＣＳが６０ｋＨｚの場合、Ｃ１＝２としてもよい。なお、Ｃ２又はＣ３は、ＳＣＳごとのＴＡ値に基づいて固定的に設定されてもよいし、暗黙的に導出されてもよい。また、ＣＰ延長の期間は負の値をとってもよい（すなわち、ＣＰが短縮される）。 The above C1, C2 and C3 may be values set according to SCS (SubCarrier spacing). For example, when the SCS is 15 kHz or 30 kHz, C1 = 1 may be set. Further, for example, when the SCS is 60 kHz, C1 = 2 may be set. Note that C2 or C3 may be fixedly set based on the TA value for each SCS, or may be implicitly derived. Also, the CP extension period may take a negative value (ie, the CP is shortened).
　なお、ＵＬグラントからＰＵＳＣＨ送信までの遅延値Ｎ２は、ＣＰ延長を考慮して緩和されてもよい。なお、あるＳＣＳにおけるＣＰ延長は、１シンボル以下を限度としてもよいし、１シンボルを超えてもよい。なお、上記のＣＰ延長は、他のＵＬ送信に対して適用されてもよい。なお、端末２０が動的にシグナリングされるＣＰ延長期間の数は設定可能であってもよい。また、ＣＰ延長に基づくＬＢＴギャップは、カテゴリ４以外のカテゴリにおいて必要であってもよい。すなわち、カテゴリ４では、ＣＰ延長によらないＬＢＴギャップが設定されてもよい。 The delay value N2 from UL grant to PUSCH transmission may be relaxed in consideration of CP extension. The CP extension in a certain SCS may be limited to one symbol or less, or may exceed one symbol. The above CP extension may be applied to other UL transmissions. The number of CP extension periods dynamically signaled by the terminal 20 may be set. Also, the LBT gap based on CP extension may be required in categories other than category 4. That is, in category 4, an LBT gap that does not depend on CP extension may be set.
　チャネルアクセス方法にカテゴリ４が使用されている場合、ＣＡＰＣ（Channel Access Priority Class）が端末２０に通知されてもよい。ＣＡＰＣは、ＵＬ送信のためのコンテンションウィンドウを決定するため通知される。表２は、非特許文献４に記載されるＵＬのためのＣＡＰＣの例を示す。 When category 4 is used as the channel access method, CAPC (Channel Access Priority Class) may be notified to the terminal 20. The CAPC is notified to determine the contention window for UL transmission. Table 2 shows an example of CAPC for UL described in Non-Patent Document 4.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　表２に示されるように、ＣＡＰＣが１から４に対応するコンテンションウィンドウに係るパラメータが定義される。ｍpは、連続するスロット期間を示す。ＣＷｍｉｎ，ｐは、最小のコンテンションウィンドウを示す。ＣＷｍａｘ，ｐは、最大のコンテンションウィンドウを示す。Ｔｕｌｍｃｏｔ，ｐは、最大のＵＬ－ＣＯＴを示す。ＣＷｐは、コンテンションウィンドウを示す。 As shown in Table 2, the parameters related to the contention window corresponding to CAPC 1 to 4 are defined. m p denotes the slot consecutive periods. CW min, p indicates the smallest contention window. CW max and p indicate the maximum contention window. Tulmcot, p indicates the maximum UL-COT. CW p indicates a contention window.
　例えば、ＣＡＰＣ（ｐ）＝１の場合、表２に示されるように、連続するスロット期間は２、最小のコンテンションウィンドウは３、最大のコンテンションウィンドウは７、最大のＵＬ－ＣＯＴは２ｍｓ、許容されるコンテンションウィンドウサイズは３又は７である。 For example, when CAPC (p) = 1, as shown in Table 2, the continuous slot period is 2, the minimum contention window is 3, the maximum contention window is 7, and the maximum UL-COT is 2 ms. The allowable contention window size is 3 or 7.
　例えば、ＣＡＰＣ（ｐ）＝２の場合、表２に示されるように、連続するスロット期間は２、最小のコンテンションウィンドウは７、最大のコンテンションウィンドウは１５、最大のＵＬ－ＣＯＴは４ｍｓ、許容されるコンテンションウィンドウサイズは７又は１５である。 For example, when CAPC (p) = 2, as shown in Table 2, the continuous slot period is 2, the minimum contention window is 7, the maximum contention window is 15, and the maximum UL-COT is 4 ms. The allowable contention window size is 7 or 15.
　例えば、ＣＡＰＣ（ｐ）＝３の場合、表２に示されるように、連続するスロット期間は３、最小のコンテンションウィンドウは１５、最大のコンテンションウィンドウは１０２３、最大のＵＬ－ＣＯＴは６ｍｓ又は１０ｍｓ、許容されるコンテンションウィンドウサイズは１５、３１、６３、１２７、２５５、５１１又は１０２３である。 For example, when CAPC (p) = 3, as shown in Table 2, the continuous slot period is 3, the minimum contention window is 15, the maximum contention window is 1023, and the maximum UL-COT is 6 ms or For 10 ms, the allowable contention window size is 15, 31, 63, 127, 255, 511 or 1023.
　例えば、ＣＡＰＣ（ｐ）＝４の場合、表２に示されるように、連続するスロット期間は７、最小のコンテンションウィンドウは１５、最大のコンテンションウィンドウは１０２３、最大のＵＬ－ＣＯＴは６ｍｓ又は１０ｍｓ、許容されるコンテンションウィンドウサイズは１５、３１、６３、１２７、２５５、５１１又は１０２３である。 For example, when CAPC (p) = 4, as shown in Table 2, the continuous slot period is 7, the minimum contention window is 15, the maximum contention window is 1023, and the maximum UL-COT is 6 ms or For 10 ms, the allowable contention window size is 15, 31, 63, 127, 255, 511 or 1023.
　また、図４に示されるステップＳ２で端末２０が受信するＵＬ送信をスケジューリング又はトリガするＤＣＩは、ＣＰ延長値を含んでもよいし、チャネルアクセス方法がカテゴリ４であるか否かを示す１ビットの情報を含んでもよいし、当該ＵＬ送信に対応するＣＡＰＣを示す２ビットの情報を含んでもよい。 Further, the DCI that schedules or triggers the UL transmission received by the terminal 20 in step S2 shown in FIG. 4 may include a CP extension value, and is a 1-bit indicator indicating whether or not the channel access method is category 4. Information may be included, or 2-bit information indicating the CAPC corresponding to the UL transmission may be included.
　チャネルアクセス方法がカテゴリ４ではないことが通知されたとき、適用するチャネルアクセス方法は、以下ａ）ｂ）のように決定されてもよい。 When notified that the channel access method is not category 4, the channel access method to be applied may be determined as in a) b) below.
ａ）カテゴリ１
スケジューリング又はトリガされるＵＬ送信は、ＰＵＣＣＨ又はＵＣＩを伴うＰＵＳＣＨである場合、又は、スケジューリング又はトリガされるＵＬ送信は、ＳＲＳ又はＵＣＩを伴わないＰＵＳＣＨであって当該ＳＲＳ又はＰＵＳＣＨの期間は所定の閾値以下である場合、適用するチャネルアクセス方法はカテゴリ１であると決定されてもよい。 a) Category 1
If the scheduled or triggered UL transmission is a PUSCH with PUCCH or UCI, or if the scheduled or triggered UL transmission is a PUSCH without SRS or UCI, the duration of the SRS or PUSCH is a predetermined threshold. If the following, the applicable channel access method may be determined to be Category 1.
ｂ）カテゴリ２
スケジューリング又はトリガされるＵＬ送信は、ＳＲＳ又はＵＣＩを伴わないＰＵＳＣＨであって当該ＳＲＳ又はＰＵＳＣＨの期間は所定の閾値を超える場合、適用するチャネルアクセス方法はカテゴリ２であると決定されてもよい。さらに、ＬＢＴ１６μｓカテゴリ２が適用されるかＬＢＴ２５μｓカテゴリ２が適用されるかは、ＤＣＩに含まれるＣＰ延長値によって暗黙的に通知されてもよい。 b) Category 2
If the scheduled or triggered UL transmission is a PUSCH without SRS or UCI and the duration of the SRS or PUSCH exceeds a predetermined threshold, it may be determined that the channel access method applied is Category 2. Furthermore, whether LBT 16 μs category 2 is applied or LBT 25 μs category 2 is applied may be implicitly notified by the CP extension value included in the DCI.
　ここで、図４に示されるステップＳ２で基地局１０から送信されるＤＣＩによって、ＣＰ延長値、チャネルアクセス方法及びＣＡＰＣがそれぞれ端末２０に通知される場合、固定ビット長で、２＋１＋２ビットすなわち５ビットが必要となり、オーバヘッドが増加する。一方、ＣＰ延長値は、チャネルアクセス方法がカテゴリ４以外のときのみ必要であり、ＣＡＰＣはチャネルアクセス方法がカテゴリ４のときのみ必要であり、いずれも２ビットで通知可能な情報である。 Here, when the CP extension value, the channel access method, and the CAPC are each notified to the terminal 20 by the DCI transmitted from the base station 10 in step S2 shown in FIG. 4, the fixed bit length is 2 + 1 + 2 bits, that is, 5 bits. Is required, and the overhead increases. On the other hand, the CP extension value is required only when the channel access method is other than category 4, and the CAPC is required only when the channel access method is category 4, and both are information that can be notified by 2 bits.
　そこで、ＮＲ－ＵのＵＬ送信において、可能な限り小さなＤＣＩサイズで、適切なチャネルアクセス方法、ＣＡＰＣ及びＣＰ延長値（「ＬＢＴギャップ」と呼ばれてもよい。）を通知する方法を提案する。 Therefore, in UL transmission of NR-U, we propose a method of notifying an appropriate channel access method, CAPC and CP extension value (may be called "LBT gap") with the smallest possible DCI size.
　例えば、基地局１０は、ＤＣＩで指示するＵＬ送信に適用するチャネルアクセス方法がカテゴリ４であるか否かを示す情報を当該ＤＣＩに含まれる１ビットで端末２０に通知する。当該ＤＣＩに含まれる１ビットでチャネルアクセス方法がカテゴリ４であることが通知される場合、基地局１０は当該ＤＣＩに含まれる２ビットのフィールドでＣＡＰＣを端末２０に通知する。当該ＤＣＩに含まれる１ビットでチャネルアクセス方法がカテゴリ４であることが通知される場合、基地局１０は当該ＤＣＩに含まれるＣＡＰＣと同じフィールドの２ビットでＣＰ延長値を端末２０に通知する。 For example, the base station 10 notifies the terminal 20 of information indicating whether or not the channel access method applied to the UL transmission instructed by the DCI is category 4 with one bit included in the DCI. When the 1-bit included in the DCI notifies that the channel access method is category 4, the base station 10 notifies the terminal 20 of the CAPC in the 2-bit field included in the DCI. When the 1 bit included in the DCI notifies that the channel access method is category 4, the base station 10 notifies the terminal 20 of the CP extension value in 2 bits of the same field as the CAPC included in the DCI.
　図５は、本発明の実施の形態における端末２０の動作例を説明するためのフローチャートである。図４に示されるステップＳ２における端末２０の詳細な動作例を以下説明する。 FIG. 5 is a flowchart for explaining an operation example of the terminal 20 according to the embodiment of the present invention. A detailed operation example of the terminal 20 in step S2 shown in FIG. 4 will be described below.
　ステップＳ２１において、端末２０はＤＣＩを受信する。例えば、ステップＳ２１で端末２０が受信する、ＰＵＳＣＨに適用するチャネルアクセス方法がカテゴリ４であるか否かを示す１ビットを含むＤＣＩは、当該ＰＵＳＣＨの送信を指示するＵＬグラント及びＲＡＲをスケジュールするＤＣＩであってもよい。また、ステップＳ２で端末２０が受信する、ＰＵＣＣＨに適用するチャネルアクセス方法がカテゴリ４であるか否かを示す１ビットを含むＤＣＩは、ＰＵＣＣＨ送信を伴うＤＬ　ａｓｓｉｇｎｍｅｎｔを有するＤＣＩであってもよい。ステップＳ２で端末２０が受信する、ＳＲＳに適用するチャネルアクセス方法がカテゴリ４であるか否かを示す１ビットを含むＤＣＩは、ＳＲＳリクエストを含むＤＣＩフォーマット０＿１、１＿１又は２＿３等であってもよい。ただし、これらは例であり、ステップＳ２１で受信するＤＣＩはこれらに限られない。 In step S21, the terminal 20 receives the DCI. For example, the DCI received by the terminal 20 in step S21, which includes one bit indicating whether or not the channel access method applied to the PUSCH is category 4, is a DCI that schedules the UL grant and RAR instructing the transmission of the PUSCH. It may be. Further, the DCI including one bit indicating whether or not the channel access method applied to the PUCCH received by the terminal 20 in step S2 is category 4 may be a DCI having a DL assertion accompanied by the PUCCH transmission. The DCI including one bit indicating whether or not the channel access method applied to SRS received by the terminal 20 in step S2 is category 4 may be DCI format 0_1, 1_1, 2_3 or the like including the SRS request. .. However, these are examples, and the DCI received in step S21 is not limited to these.
　ステップＳ２２において、端末２０は、ＤＣＩで通知されたチャネルアクセス方法がカテゴリ４か否かを判定する。ＤＣＩで通知されたチャネルアクセス方法がカテゴリ４である場合（Ｓ２２のＹＥＳ）、ステップＳ２３に進み、ＤＣＩで通知されたチャネルアクセス方法がカテゴリ４ではない場合（Ｓ２２のＮＯ）、ステップＳ２４に進む。すなわち、端末２０は、ＤＣＩで通知されたチャネルアクセス方法に基づいて、特定のＤＣＩフィールドを解釈する。 In step S22, the terminal 20 determines whether or not the channel access method notified by DCI is category 4. If the channel access method notified by DCI is category 4 (YES in S22), the process proceeds to step S23, and if the channel access method notified by DCI is not category 4 (NO in S22), the process proceeds to step S24. That is, the terminal 20 interprets a specific DCI field based on the channel access method notified by DCI.
　ステップＳ２３において、端末２０は、ＤＣＩのフィールドからＣＡＰＣを取得する。表３は、ＣＡＰＣが通知される場合のＤＣＩのフィールド２ビットとＣＡＰＣとのマッピングを示す。 In step S23, the terminal 20 acquires CAPC from the DCI field. Table 3 shows the mapping between the field 2 bits of DCI and CAPC when CAPC is notified.
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
　表３に示されるように、２ビットのＣＡＰＣフィールド「００」は、ＣＡＰＣ＝１に対応してもよい。２ビットのＣＡＰＣフィールド「０１」は、ＣＡＰＣ＝２に対応してもよい。２ビットのＣＡＰＣフィールド「１０」は、ＣＡＰＣ＝３に対応してもよい。２ビットのＣＡＰＣフィールド「１１」は、ＣＡＰＣ＝４に対応してもよい。なお、表３のマッピングを示すテーブルは、あらかじめ規定されていてもよいし、例えば図４に示されるステップＳ１の上位レイヤシグナリングで設定されてもよい。 As shown in Table 3, the 2-bit CAPC field "00" may correspond to CAPC = 1. The 2-bit CAPC field "01" may correspond to CAPC = 2. The 2-bit CAPC field "10" may correspond to CAPC = 3. The 2-bit CAPC field "11" may correspond to CAPC = 4. The table showing the mapping in Table 3 may be defined in advance, or may be set by, for example, the upper layer signaling in step S1 shown in FIG.
　一方、ステップＳ２４において、端末２０は、ステップＳ２３で参照される同一のＤＣＩのフィールドからＣＰ延長値を取得する。表４は、ＣＰ延長値が通知される場合のＤＣＩのフィールド２ビットとＣＰ延長値との対応を示す。 On the other hand, in step S24, the terminal 20 acquires the CP extension value from the same DCI field referred to in step S23. Table 4 shows the correspondence between the field 2 bits of DCI and the CP extension value when the CP extension value is notified.
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
　表４に示されるように、２ビットのＣＰ延長値フィールド「００」は、ＣＰ延長値＝「０μｓ」に対応してもよい。２ビットのＣＰ延長値フィールド「０１」は、ＣＰ延長値＝「Ｃ１＊シンボル長－２５」μｓに対応してもよい。２ビットのＣＰ延長値フィールド「１０」は、ＣＰ延長値＝「Ｃ２＊シンボル長－１６－ＴＡ」μｓに対応してもよい。２ビットのＣＰ延長値フィールド「１１」は、ＣＰ延長値＝「Ｃ３＊シンボル長－２５－ＴＡ」μｓに対応してもよい。なお、表４のマッピングを示すテーブルは、あらかじめ規定されていてもよいし、例えば図４に示されるステップＳ１の上位レイヤシグナリングで設定されてもよい。なお、Ｃ１、Ｃ２又はＣ３の値は、対応するＵＬ送信に適用されるＴＡ値及び／又はＳＣＳから決定されてもよい。 As shown in Table 4, the 2-bit CP extension value field "00" may correspond to the CP extension value = "0 μs". The 2-bit CP extension value field "01" may correspond to CP extension value = "C1 * symbol length-25" μs. The 2-bit CP extension value field "10" may correspond to CP extension value = "C2 * symbol length-16-TA" μs. The 2-bit CP extension value field "11" may correspond to CP extension value = "C3 * symbol length-25-TA" μs. The table showing the mapping in Table 4 may be defined in advance, or may be set by, for example, the upper layer signaling in step S1 shown in FIG. The value of C1, C2 or C3 may be determined from the TA value and / or SCS applied to the corresponding UL transmission.
　なお、表３及び表４に示されるＤＣＩフィールドの解釈は一例であり、チャネルアクセス方法に基づいて、ＤＣＩフィールドは必要に応じて他のパラメータに解釈されてもよい。 The interpretation of the DCI field shown in Tables 3 and 4 is an example, and the DCI field may be interpreted by other parameters as necessary based on the channel access method.
　上述の実施例により、端末２０は、ＵＬ送信に適用されるチャネルアクセス方法に応じて、同一のＤＣＩフィールドから異なる種別のパラメータを取得することにより、シグナリングオーバヘッドを低減することができる。 According to the above embodiment, the terminal 20 can reduce the signaling overhead by acquiring different types of parameters from the same DCI field according to the channel access method applied to UL transmission.
　すなわち、無線通信システムにおいて、ＬＢＴ（Listen Before Talk）動作に必要となるパラメータを効率的にシグナリングすることができる。 That is, in a wireless communication system, parameters required for LBT (Listen Before Talk) operation can be efficiently signaled.
　（装置構成）
　次に、これまでに説明した処理及び動作を実行する基地局１０及び端末２０の機能構成例を説明する。基地局１０及び端末２０は上述した実施例を実施する機能を含む。ただし、基地局１０及び端末２０はそれぞれ、実施例の中の一部の機能のみを備えることとしてもよい。 (Device configuration)
Next, a functional configuration example of the base station 10 and the terminal 20 that execute the processes and operations described so far will be described. The base station 10 and the terminal 20 include a function of carrying out the above-described embodiment. However, the base station 10 and the terminal 20 may each have only a part of the functions in the embodiment.
　＜基地局１０＞
　図６は、本発明の実施の形態における基地局１０の機能構成の一例を示す図である。図６に示されるように、基地局１０は、送信部１１０と、受信部１２０と、設定部１３０と、制御部１４０とを有する。図６に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。 <Base station 10>
FIG. 6 is a diagram showing an example of the functional configuration of the base station 10 according to the embodiment of the present invention. As shown in FIG. 6, the base station 10 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in FIG. 6 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
　送信部１１０は、端末２０側に送信する信号を生成し、当該信号を無線で送信する機能を含む。また、送信部１１０は、ネットワークノード間メッセージを他のネットワークノードに送信する。受信部１２０は、端末２０から送信された各種の信号を受信し、受信した信号から、例えばより上位のレイヤの情報を取得する機能を含む。また、送信部１１０は、端末２０へＮＲ－ＰＳＳ、ＮＲ－ＳＳＳ、ＮＲ－ＰＢＣＨ、ＤＬ／ＵＬ制御信号等を送信する機能を有する。また、受信部１２０は、ネットワークノード間メッセージを他のネットワークノードから受信する。 The transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. Further, the transmission unit 110 transmits a message between network nodes to another network node. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring information of, for example, a higher layer from the received signals. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals and the like to the terminal 20. In addition, the receiving unit 120 receives a message between network nodes from another network node.
　設定部１３０は、予め設定される設定情報、及び、端末２０に送信する各種の設定情報を格納する。設定情報の内容は、例えば、ＮＲ－Ｕの通信に係る設定等である。 The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, a setting related to NR-U communication.
　制御部１４０は、実施例において説明したように、ＵＬグラントに係る制御を行う。制御部１４０における信号送信に関する機能部を送信部１１０に含め、制御部１４０における信号受信に関する機能部を受信部１２０に含めてもよい。 The control unit 140 controls the UL grant as described in the embodiment. The function unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the function unit related to signal reception in the control unit 140 may be included in the reception unit 120.
　＜端末２０＞
　図７は、本発明の実施の形態における端末２０の機能構成の一例を示す図である。図７に示されるように、端末２０は、送信部２１０と、受信部２２０と、設定部２３０と、制御部２４０とを有する。図７に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。 <Terminal 20>
FIG. 7 is a diagram showing an example of the functional configuration of the terminal 20 according to the embodiment of the present invention. As shown in FIG. 7, the terminal 20 has a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in FIG. 7 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
　送信部２１０は、送信データから送信信号を作成し、当該送信信号を無線で送信する。受信部２２０は、各種の信号を無線受信し、受信した物理レイヤの信号からより上位のレイヤの信号を取得する。また、受信部２２０は、基地局１０から送信されるＮＲ－ＰＳＳ、ＮＲ－ＳＳＳ、ＮＲ－ＰＢＣＨ、ＤＬ／ＵＬ／ＳＬ制御信号等を受信する機能を有する。また、例えば、送信部２１０は、Ｄ２Ｄ通信として、他の端末２０に、ＰＳＣＣＨ（Physical Sidelink Control Channel）、ＰＳＳＣＨ（Physical Sidelink Shared Channel）、ＰＳＤＣＨ（Physical Sidelink Discovery Channel）、ＰＳＢＣＨ（Physical Sidelink Broadcast Channel）等を送信し、受信部２２０は、他の端末２０から、ＰＳＣＣＨ、ＰＳＳＣＨ、ＰＳＤＣＨ又はＰＳＢＣＨ等を受信する。 The transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal. The receiving unit 220 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer. Further, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals and the like transmitted from the base station 10. Further, for example, as D2D communication, the transmission unit 210 connects the other terminal 20 to PSCCH (Physical Sidelink Control Channel), PSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel). Etc., and the receiving unit 220 receives PSCCH, PSCH, PSDCH, PSBCH, etc. from the other terminal 20.
　設定部２３０は、受信部２２０により基地局１０から受信した各種の設定情報を格納する。また、設定部２３０は、予め設定される設定情報も格納する。設定情報の内容は、例えば、ＮＲ－Ｕの通信に係る設定等である。 The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220. The setting unit 230 also stores preset setting information. The content of the setting information is, for example, a setting related to NR-U communication.
　制御部２４０は、実施例において説明したように、ＵＬグラントに基づいてＬＢＴを伴う送信を実行する制御を行う。制御部２４０における信号送信に関する機能部を送信部２１０に含め、制御部２４０における信号受信に関する機能部を受信部２２０に含めてもよい。 As described in the embodiment, the control unit 240 controls to execute the transmission accompanied by the LBT based on the UL grant. The function unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the function unit related to signal reception in the control unit 240 may be included in the reception unit 220.
　（ハードウェア構成）
　上記実施形態の説明に用いたブロック図（図６及び図７）は、機能単位のブロックを示している。これらの機能ブロック（構成部）は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した１つの装置を用いて実現されてもよいし、物理的又は論理的に分離した２つ以上の装置を直接的又は間接的に（例えば、有線、無線などを用いて）接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記１つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。 (Hardware configuration)
The block diagrams (FIGS. 6 and 7) used in the description of the above embodiment show blocks of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.
　機能には、判断、決定、判定、計算、算出、処理、導出、調査、探索、確認、受信、送信、出力、アクセス、解決、選択、選定、確立、比較、想定、期待、見做し、報知（broadcasting）、通知（notifying）、通信（communicating）、転送（forwarding）、構成（configuring）、再構成（reconfiguring）、割り当て（allocating、mapping）、割り振り（assigning）などがあるが、これらに限られない。たとえば、送信を機能させる機能ブロック（構成部）は、送信部（transmitting　unit）や送信機（transmitter）と呼称される。いずれも、上述したとおり、実現方法は特に限定されない。 Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. There are broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but only these. I can't. For example, a functional block (constituent unit) that functions transmission is called a transmitting unit (transmitting unit) or a transmitter (transmitter). As described above, the method of realizing each of them is not particularly limited.
　例えば、本開示の一実施の形態における基地局１０、端末２０等は、本開示の無線通信方法の処理を行うコンピュータとして機能してもよい。図８は、本開示の一実施の形態に係る基地局１０及び端末２０のハードウェア構成の一例を示す図である。上述の基地局１０及び端末２０は、物理的には、プロセッサ１００１、記憶装置１００２、補助記憶装置１００３、通信装置１００４、入力装置１００５、出力装置１００６、バス１００７などを含むコンピュータ装置として構成されてもよい。 For example, the base station 10, the terminal 20, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. FIG. 8 is a diagram showing an example of the hardware configuration of the base station 10 and the terminal 20 according to the embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. May be good.
　なお、以下の説明では、「装置」という文言は、回路、デバイス、ユニット等に読み替えることができる。基地局１０及び端末２０のハードウェア構成は、図に示した各装置を１つ又は複数含むように構成されてもよいし、一部の装置を含まずに構成されてもよい。 In the following explanation, the word "device" can be read as a circuit, device, unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
　基地局１０及び端末２０における各機能は、プロセッサ１００１、記憶装置１００２等のハードウェア上に所定のソフトウェア（プログラム）を読み込ませることによって、プロセッサ１００１が演算を行い、通信装置１００４による通信を制御したり、記憶装置１００２及び補助記憶装置１００３におけるデータの読み出し及び書き込みの少なくとも一方を制御したりすることによって実現される。 For each function of the base station 10 and the terminal 20, the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, and controls the communication by the communication device 1004. It is realized by controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
　プロセッサ１００１は、例えば、オペレーティングシステムを動作させてコンピュータ全体を制御する。プロセッサ１００１は、周辺装置とのインタフェース、制御装置、演算装置、レジスタ等を含む中央処理装置（ＣＰＵ：Central Processing Unit）で構成されてもよい。例えば、上述の制御部１４０、制御部２４０等は、プロセッサ１００１によって実現されてもよい。 Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like. For example, the above-mentioned control unit 140, control unit 240, and the like may be realized by the processor 1001.
　また、プロセッサ１００１は、プログラム（プログラムコード）、ソフトウェアモジュール又はデータ等を、補助記憶装置１００３及び通信装置１００４の少なくとも一方から記憶装置１００２に読み出し、これらに従って各種の処理を実行する。プログラムとしては、上述の実施の形態において説明した動作の少なくとも一部をコンピュータに実行させるプログラムが用いられる。例えば、図６に示した基地局１０の制御部１４０は、記憶装置１００２に格納され、プロセッサ１００１で動作する制御プログラムによって実現されてもよい。また、例えば、図７に示した端末２０の制御部２４０は、記憶装置１００２に格納され、プロセッサ１００１で動作する制御プログラムによって実現されてもよい。上述の各種処理は、１つのプロセッサ１００１によって実行される旨を説明してきたが、２以上のプロセッサ１００１により同時又は逐次に実行されてもよい。プロセッサ１００１は、１以上のチップによって実装されてもよい。なお、プログラムは、電気通信回線を介してネットワークから送信されてもよい。 Further, the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, the control unit 140 of the base station 10 shown in FIG. 6 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. Further, for example, the control unit 240 of the terminal 20 shown in FIG. 7 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above-mentioned various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.
　記憶装置１００２は、コンピュータ読み取り可能な記録媒体であり、例えば、ＲＯＭ（Read Only Memory）、ＥＰＲＯＭ（Erasable Programmable ROM）、ＥＥＰＲＯＭ（Electrically Erasable Programmable ROM）、ＲＡＭ（Random Access Memory）等の少なくとも１つによって構成されてもよい。記憶装置１００２は、レジスタ、キャッシュ、メインメモリ（主記憶装置）等と呼ばれてもよい。記憶装置１００２は、本開示の一実施の形態に係る通信方法を実施するために実行可能なプログラム（プログラムコード）、ソフトウェアモジュール等を保存することができる。 The storage device 1002 is a computer-readable recording medium, and is, for example, by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. It may be configured. The storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.
　補助記憶装置１００３は、コンピュータ読み取り可能な記録媒体であり、例えば、ＣＤ－ＲＯＭ（Compact Disc ROM）等の光ディスク、ハードディスクドライブ、フレキシブルディスク、光磁気ディスク（例えば、コンパクトディスク、デジタル多用途ディスク、Ｂｌｕ－ｒａｙ（登録商標）ディスク）、スマートカード、フラッシュメモリ（例えば、カード、スティック、キードライブ）、フロッピー（登録商標）ディスク、磁気ストリップ等の少なくとも１つによって構成されてもよい。上述の記憶媒体は、例えば、記憶装置１００２及び補助記憶装置１００３の少なくとも一方を含むデータベース、サーバその他の適切な媒体であってもよい。 The auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu). -It may be composed of at least one of a ray® disc), a smart card, a flash memory (eg, a card, a stick, a key drive), a floppy® disc, a magnetic strip, and the like. The storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 1003.
　通信装置１００４は、有線ネットワーク及び無線ネットワークの少なくとも一方を介してコンピュータ間の通信を行うためのハードウェア（送受信デバイス）であり、例えばネットワークデバイス、ネットワークコントローラ、ネットワークカード、通信モジュールなどともいう。通信装置１００４は、例えば周波数分割複信（ＦＤＤ：Frequency　Division　Duplex）及び時分割複信（ＴＤＤ：Time　Division　Duplex）の少なくとも一方を実現するために、高周波スイッチ、デュプレクサ、フィルタ、周波数シンセサイザなどを含んで構成されてもよい。例えば、送受信アンテナ、アンプ部、送受信部、伝送路インターフェース等は、通信装置１００４によって実現されてもよい。送受信部は、送信部と受信部とで、物理的に、または論理的に分離された実装がなされてもよい。 The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of. For example, the transmission / reception antenna, the amplifier unit, the transmission / reception unit, the transmission line interface, and the like may be realized by the communication device 1004. The transmission / reception unit may be physically or logically separated from each other in the transmission unit and the reception unit.
　入力装置１００５は、外部からの入力を受け付ける入力デバイス（例えば、キーボード、マウス、マイクロフォン、スイッチ、ボタン、センサ等）である。出力装置１００６は、外部への出力を実施する出力デバイス（例えば、ディスプレイ、スピーカー、LEDランプ等）である。なお、入力装置１００５及び出力装置１００６は、一体となった構成（例えば、タッチパネル）であってもよい。 The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
　また、プロセッサ１００１及び記憶装置１００２等の各装置は、情報を通信するためのバス１００７によって接続される。バス１００７は、単一のバスを用いて構成されてもよいし、装置間ごとに異なるバスを用いて構成されてもよい。 Further, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
　また、基地局１０及び端末２０は、マイクロプロセッサ、デジタル信号プロセッサ（ＤＳＰ：Digital Signal Processor）、ＡＳＩＣ（Application Specific Integrated Circuit）、ＰＬＤ（Programmable Logic Device）、ＦＰＧＡ（Field Programmable Gate Array）等のハードウェアを含んで構成されてもよく、当該ハードウェアにより、各機能ブロックの一部又は全てが実現されてもよい。例えば、プロセッサ１００１は、これらのハードウェアの少なくとも１つを用いて実装されてもよい。 Further, the base station 10 and the terminal 20 are hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include, and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
　（実施の形態のまとめ）
　以上、説明したように、本発明の実施の形態によれば、上りリンク送信を指示する下りリンク制御情報を基地局から受信する受信部と、前記下りリンク制御情報に含まれる前記上りリンク送信に適用されるチャネルアクセス方式を示す情報に基づいて、前記下りリンク制御情報に含まれるフィールドを解釈する制御部と、前記チャネルアクセス方式及び前記フィールドを解釈したパラメータを適用して前記上りリンク送信を前記基地局に実行する送信部とを有する端末が提供される。 (Summary of embodiments)
As described above, according to the embodiment of the present invention, the receiving unit that receives the downlink control information instructing the uplink transmission from the base station and the uplink transmission included in the downlink control information. Based on the information indicating the applied channel access method, the control unit that interprets the fields included in the downlink control information, and the uplink transmission by applying the channel access method and the parameters that interpret the fields are performed. A terminal having a transmitter to execute on the base station is provided.
　上記の構成により、端末２０は、ＵＬ送信に適用されるチャネルアクセス方法に応じて、同一のＤＣＩフィールドから異なる種別のパラメータを取得することにより、シグナリングオーバヘッドを低減することができる。すなわち、無線通信システムにおいて、ＬＢＴ（Listen Before Talk）動作に必要となるパラメータを効率的にシグナリングすることができる。 With the above configuration, the terminal 20 can reduce the signaling overhead by acquiring different types of parameters from the same DCI field according to the channel access method applied to UL transmission. That is, in a wireless communication system, parameters required for LBT (Listen Before Talk) operation can be efficiently signaled.
　前記制御部は、前記チャネルアクセス方式が、ランダムバックオフを伴い、可変サイズのコンテンションウィンドウを使用するＬＢＴ（Listen Before Talk）を行うチャネルアクセス方法である場合、前記フィールドを第１のパラメータを示すと解釈し、前記チャネルアクセス方式が、ランダムバックオフを伴い、可変サイズのコンテンションウィンドウを使用するＬＢＴを行うチャネルアクセス方法でない場合、前記フィールドを前記第１のパラメータと異なる第２のパラメータを示すと解釈してもよい。当該構成により、端末２０は、ＵＬ送信に適用されるチャネルアクセス方法に応じて、同一のＤＣＩフィールドから異なる種別のパラメータを取得することができる。 The control unit indicates the first parameter in the field when the channel access method is a channel access method that performs LBT (Listen Before Talk) using a variable-sized contention window with random backoff. If the channel access method is not a channel access method that performs LBT using a variable size contention window with random backoff, the field indicates a second parameter different from the first parameter. It may be interpreted as. With this configuration, the terminal 20 can acquire different types of parameters from the same DCI field depending on the channel access method applied to UL transmission.
　前記第１のパラメータは、ＣＡＰＣ（Channel Access Priority Class）であり、前記第２のパラメータは、ＣＰ（Cyclic Prefix）延長値であってもよい。当該構成により、端末２０は、ＵＬ送信に適用されるチャネルアクセス方法に応じて、同一のＤＣＩフィールドから異なる種別のパラメータを取得することができる。 The first parameter may be CAPC (Channel Access Priority Class), and the second parameter may be a CP (Cyclic Prefix) extension value. With this configuration, the terminal 20 can acquire different types of parameters from the same DCI field depending on the channel access method applied to UL transmission.
　前記チャネルアクセス方式を示す情報は１ビット長であり、前記フィールドは２ビット長であってもよい。当該構成により、端末２０は、ＵＬ送信に適用されるチャネルアクセス方法に応じて、同一のＤＣＩフィールドから異なる種別のパラメータを取得して、シグナリングオーバヘッドを低減することができる。
The information indicating the channel access method is 1 bit long, and the field may be 2 bits long. With this configuration, the terminal 20 can acquire different types of parameters from the same DCI field depending on the channel access method applied to UL transmission to reduce the signaling overhead.
　また、本発明の実施の形態によれば、上りリンク送信を指示する下りリンク制御情報を基地局から受信する受信手順と、前記下りリンク制御情報に含まれる前記上りリンク送信に適用されるチャネルアクセス方式を示す情報に基づいて、前記下りリンク制御情報に含まれるフィールドを解釈する制御手順と、前記チャネルアクセス方式及び前記フィールドを解釈したパラメータを適用して前記上りリンク送信を前記基地局に実行する送信手順とを端末が実行する通信方法が提供される。 Further, according to the embodiment of the present invention, a reception procedure for receiving downlink control information instructing uplink transmission from a base station and channel access applied to the uplink transmission included in the downlink control information. Based on the information indicating the method, the control procedure for interpreting the field included in the downlink control information, the channel access method, and the parameters interpreting the field are applied to execute the uplink transmission to the base station. A communication method is provided in which the terminal executes the transmission procedure.
　上記の構成により、端末２０は、ＵＬ送信に適用されるチャネルアクセス方法に応じて、同一のＤＣＩフィールドから異なる種別のパラメータを取得することにより、シグナリングオーバヘッドを低減することができる。すなわち、無線通信システムにおいて、ＬＢＴ（Listen Before Talk）動作に必要となるパラメータを効率的にシグナリングすることができる。 With the above configuration, the terminal 20 can reduce the signaling overhead by acquiring different types of parameters from the same DCI field according to the channel access method applied to UL transmission. That is, in a wireless communication system, parameters required for LBT (Listen Before Talk) operation can be efficiently signaled.
　（実施形態の補足）
　以上、本発明の実施の形態を説明してきたが、開示される発明はそのような実施形態に限定されず、当業者は様々な変形例、修正例、代替例、置換例等を理解するであろう。発明の理解を促すため具体的な数値例を用いて説明がなされたが、特に断りのない限り、それらの数値は単なる一例に過ぎず適切な如何なる値が使用されてもよい。上記の説明における項目の区分けは本発明に本質的ではなく、２以上の項目に記載された事項が必要に応じて組み合わせて使用されてよいし、ある項目に記載された事項が、別の項目に記載された事項に（矛盾しない限り）適用されてよい。機能ブロック図における機能部又は処理部の境界は必ずしも物理的な部品の境界に対応するとは限らない。複数の機能部の動作が物理的には１つの部品で行われてもよいし、あるいは１つの機能部の動作が物理的には複数の部品により行われてもよい。実施の形態で述べた処理手順については、矛盾の無い限り処理の順序を入れ替えてもよい。処理説明の便宜上、基地局１０及び端末２０は機能的なブロック図を用いて説明されたが、そのような装置はハードウェアで、ソフトウェアで又はそれらの組み合わせで実現されてもよい。本発明の実施の形態に従って基地局１０が有するプロセッサにより動作するソフトウェア及び本発明の実施の形態に従って端末２０が有するプロセッサにより動作するソフトウェアはそれぞれ、ランダムアクセスメモリ（ＲＡＭ）、フラッシュメモリ、読み取り専用メモリ（ＲＯＭ）、ＥＰＲＯＭ、ＥＥＰＲＯＭ、レジスタ、ハードディスク（ＨＤＤ）、リムーバブルディスク、ＣＤ－ＲＯＭ、データベース、サーバその他の適切な如何なる記憶媒体に保存されてもよい。 (Supplement to the embodiment)
Although the embodiments of the present invention have been described above, the disclosed inventions are not limited to such embodiments, and those skilled in the art can understand various modifications, modifications, alternatives, substitutions, and the like. There will be. Although explanations have been given using specific numerical examples in order to promote understanding of the invention, these numerical values are merely examples and any appropriate value may be used unless otherwise specified. The classification of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in combination with another item. May be applied (as long as there is no contradiction) to the matters described in. The boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component. The operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components. Regarding the processing procedure described in the embodiment, the processing order may be changed as long as there is no contradiction. For convenience of processing description, the base station 10 and the terminal 20 have been described with reference to functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only memory, respectively. It may be stored in (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
　また、情報の通知は、本開示で説明した態様／実施形態に限られず、他の方法を用いて行われてもよい。例えば、情報の通知は、物理レイヤシグナリング（例えば、ＤＣＩ（Downlink Control Information）、ＵＣＩ（Uplink Control Information））、上位レイヤシグナリング（例えば、ＲＲＣ（Radio Resource Control）シグナリング、ＭＡＣ（Medium Access Control）シグナリング、報知情報（ＭＩＢ（Master Information Block）、ＳＩＢ（System Information Block））、その他の信号又はこれらの組み合わせによって実施されてもよい。また、ＲＲＣシグナリングは、ＲＲＣメッセージと呼ばれてもよく、例えば、ＲＲＣ接続セットアップ（RRC Connection Setup）メッセージ、ＲＲＣ接続再構成（RRC Connection Reconfiguration）メッセージ等であってもよい。 Further, the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using another method. For example, information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. Broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof may be used. RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
　本開示において説明した各態様／実施形態は、ＬＴＥ（Long　Term　Evolution）、ＬＴＥ－Ａ（LTE-Advanced）、ＳＵＰＥＲ　３Ｇ、ＩＭＴ－Ａｄｖａｎｃｅｄ、４Ｇ（4th　generation　mobile　communication　system）、５Ｇ（5th　generation　mobile　communication　system）、ＦＲＡ（Future　Radio　Access）、ＮＲ（new　Radio）、Ｗ－ＣＤＭＡ（登録商標）、ＧＳＭ（登録商標）、ＣＤＭＡ２０００、ＵＭＢ（Ultra　Mobile　Broadband）、ＩＥＥＥ　８０２．１１（Ｗｉ－Ｆｉ（登録商標））、ＩＥＥＥ　８０２．１６（ＷｉＭＡＸ（登録商標））、ＩＥＥＥ　８０２．２０、ＵＷＢ（Ultra-WideBand）、Ｂｌｕｅｔｏｏｔｈ（登録商標）、その他の適切なシステムを利用するシステム及びこれらに基づいて拡張された次世代システムの少なくとも一つに適用されてもよい。また、複数のシステムが組み合わされて（例えば、ＬＴＥ及びＬＴＥ－Ａの少なくとも一方と５Ｇとの組み合わせ等）適用されてもよい。 Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication). system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), IEEE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize suitable systems and have been extended based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
　本明細書で説明した各態様／実施形態の処理手順、シーケンス、フローチャート等は、矛盾の無い限り、順序を入れ替えてもよい。例えば、本開示において説明した方法については、例示的な順序を用いて様々なステップの要素を提示しており、提示した特定の順序に限定されない。 The order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present specification may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.
　本明細書において基地局１０によって行われるとした特定動作は、場合によってはその上位ノード（upper node）によって行われることもある。基地局１０を有する１つ又は複数のネットワークノード（network nodes）からなるネットワークにおいて、端末２０との通信のために行われる様々な動作は、基地局１０及び基地局１０以外の他のネットワークノード（例えば、ＭＭＥ又はＳ－ＧＷ等が考えられるが、これらに限られない）の少なくとも１つによって行われ得ることは明らかである。上記において基地局１０以外の他のネットワークノードが１つである場合を例示したが、他のネットワークノードは、複数の他のネットワークノードの組み合わせ（例えば、ＭＭＥ及びＳ－ＧＷ）であってもよい。 In some cases, the specific operation performed by the base station 10 in the present specification may be performed by its upper node. In a network consisting of one or more network nodes having a base station 10, various operations performed for communication with the terminal 20 are performed by the base station 10 and other network nodes other than the base station 10 ( For example, it is clear that it can be done by at least one of (but not limited to, MME, S-GW, etc.). Although the case where there is one network node other than the base station 10 is illustrated above, the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). ..
　本開示において説明した情報又は信号等は、上位レイヤ（又は下位レイヤ）から下位レイヤ（又は上位レイヤ）へ出力され得る。複数のネットワークノードを介して入出力されてもよい。 The information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
　入出力された情報等は特定の場所（例えば、メモリ）に保存されてもよいし、管理テーブルを用いて管理してもよい。入出力される情報等は、上書き、更新、又は追記され得る。出力された情報等は削除されてもよい。入力された情報等は他の装置へ送信されてもよい。 The input / output information and the like may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.
　本開示における判定は、１ビットで表される値（０か１か）によって行われてもよいし、真偽値（Boolean：true又はfalse）によって行われてもよいし、数値の比較（例えば、所定の値との比較）によって行われてもよい。 The determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example,). , Comparison with a predetermined value).
　ソフトウェアは、ソフトウェア、ファームウェア、ミドルウェア、マイクロコード、ハードウェア記述言語と呼ばれるか、他の名称で呼ばれるかを問わず、命令、命令セット、コード、コードセグメント、プログラムコード、プログラム、サブプログラム、ソフトウェアモジュール、アプリケーション、ソフトウェアアプリケーション、ソフトウェアパッケージ、ルーチン、サブルーチン、オブジェクト、実行可能ファイル、実行スレッド、手順、機能などを意味するよう広く解釈されるべきである。 Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
　また、ソフトウェア、命令、情報などは、伝送媒体を介して送受信されてもよい。例えば、ソフトウェアが、有線技術（同軸ケーブル、光ファイバケーブル、ツイストペア、デジタル加入者回線（ＤＳＬ：Digital　Subscriber　Line）など）及び無線技術（赤外線、マイクロ波など）の少なくとも一方を使用してウェブサイト、サーバ、又は他のリモートソースから送信される場合、これらの有線技術及び無線技術の少なくとも一方は、伝送媒体の定義内に含まれる。 Further, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.
　本開示において説明した情報、信号などは、様々な異なる技術のいずれかを使用して表されてもよい。例えば、上記の説明全体に渡って言及され得るデータ、命令、コマンド、情報、信号、ビット、シンボル、チップなどは、電圧、電流、電磁波、磁界若しくは磁性粒子、光場若しくは光子、又はこれらの任意の組み合わせによって表されてもよい。 The information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
　なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル及びシンボルの少なくとも一方は信号（シグナリング）であってもよい。また、信号はメッセージであってもよい。また、コンポーネントキャリア（ＣＣ：Component　Carrier）は、キャリア周波数、セル、周波数キャリアなどと呼ばれてもよい。 Note that the terms explained in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, the signal may be a message. Further, the component carrier (CC: Component Carrier) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.
　本開示において使用する「システム」及び「ネットワーク」という用語は、互換的に使用される。 The terms "system" and "network" used in this disclosure are used interchangeably.
　また、本開示において説明した情報、パラメータなどは、絶対値を用いて表されてもよいし、所定の値からの相対値を用いて表されてもよいし、対応する別の情報を用いて表されてもよい。例えば、無線リソースはインデックスによって指示されるものであってもよい。 In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, the radio resource may be one indicated by an index.
　上述したパラメータに使用する名称はいかなる点においても限定的な名称ではない。さらに、これらのパラメータを使用する数式等は、本開示で明示的に開示したものと異なる場合もある。様々なチャネル（例えば、ＰＵＣＣＨ、ＰＤＣＣＨなど）及び情報要素は、あらゆる好適な名称によって識別できるので、これらの様々なチャネル及び情報要素に割り当てている様々な名称は、いかなる点においても限定的な名称ではない。 The names used for the above parameters are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. Since the various channels (eg, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are in any respect limited names. is not it.
　本開示においては、「基地局（ＢＳ：Base　Station）」、「無線基地局」、「基地局装置」、「固定局（fixed　station）」、「ＮｏｄｅＢ」、「ｅＮｏｄｅＢ（ｅＮＢ）」、「ｇＮｏｄｅＢ（ｇＮＢ）」、「アクセスポイント（access　point）」、「送信ポイント（transmission　point）」、「受信ポイント（reception　point）、「送受信ポイント（transmission/reception　point）」、「セル」、「セクタ」、「セルグループ」、「キャリア」、「コンポーネントキャリア」などの用語は、互換的に使用され得る。基地局は、マクロセル、スモールセル、フェムトセル、ピコセルなどの用語で呼ばれる場合もある。 In this disclosure, "base station (BS: Base Station)", "radio base station", "base station device", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB" (GNB) ”,“ access point ”,“ transmission point ”,“ reception point ”,“ transmission / reception point ”,“ cell ”,“ sector ”, Terms such as "cell group," "carrier," and "component carrier" can be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
　基地局は、１つ又は複数（例えば、３つ）のセルを収容することができる。基地局が複数のセルを収容する場合、基地局のカバレッジエリア全体は複数のより小さいエリアに区分でき、各々のより小さいエリアは、基地局サブシステム（例えば、屋内用の小型基地局（ＲＲＨ：Ｒｅｍｏｔｅ　Ｒａｄｉｏ　Ｈｅａｄ）によって通信サービスを提供することもできる。「セル」又は「セクタ」という用語は、このカバレッジにおいて通信サービスを行う基地局及び基地局サブシステムの少なくとも一方のカバレッジエリアの一部又は全体を指す。 The base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)). Communication services can also be provided by Remote Radio Head). The term "cell" or "sector" refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage. Point to.
　本開示においては、「移動局（ＭＳ：Mobile　Station）」、「ユーザ端末（user　terminal）」、「ユーザ装置（ＵＥ：User　Equipment）」、「端末」などの用語は、互換的に使用され得る。 In the present disclosure, terms such as "mobile station (MS: Mobile Station)", "user terminal", "user device (UE: User Equipment)", and "terminal" may be used interchangeably. ..
　移動局は、当業者によって、加入者局、モバイルユニット、加入者ユニット、ワイヤレスユニット、リモートユニット、モバイルデバイス、ワイヤレスデバイス、ワイヤレス通信デバイス、リモートデバイス、モバイル加入者局、アクセス端末、モバイル端末、ワイヤレス端末、リモート端末、ハンドセット、ユーザエージェント、モバイルクライアント、クライアント、又はいくつかの他の適切な用語で呼ばれる場合もある。 Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
　基地局及び移動局の少なくとも一方は、送信装置、受信装置、通信装置などと呼ばれてもよい。なお、基地局及び移動局の少なくとも一方は、移動体に搭載されたデバイス、移動体自体などであってもよい。当該移動体は、乗り物（例えば、車、飛行機など）であってもよいし、無人で動く移動体（例えば、ドローン、自動運転車など）であってもよいし、ロボット（有人型又は無人型）であってもよい。なお、基地局及び移動局の少なくとも一方は、必ずしも通信動作時に移動しない装置も含む。例えば、基地局及び移動局の少なくとも一方は、センサなどのＩｏＴ（Internet　of　Things）機器であってもよい。 At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
　また、本開示における基地局は、ユーザ端末で読み替えてもよい。例えば、基地局及びユーザ端末間の通信を、複数の端末２０間の通信（例えば、Ｄ２Ｄ（Device-to-Device）、Ｖ２Ｘ（Vehicle-to-Everything）などと呼ばれてもよい）に置き換えた構成について、本開示の各態様／実施形態を適用してもよい。この場合、上述の基地局１０が有する機能を端末２０が有する構成としてもよい。また、「上り」及び「下り」などの文言は、端末間通信に対応する文言（例えば、「サイド（side）」）で読み替えられてもよい。例えば、上りチャネル、下りチャネルなどは、サイドチャネルで読み替えられてもよい。 Further, the base station in the present disclosure may be read by the user terminal. For example, the communication between the base station and the user terminal is replaced with the communication between a plurality of terminals 20 (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the terminal 20 may have the function of the base station 10 described above. In addition, words such as "up" and "down" may be read as words corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, and the like may be read as a side channel.
　同様に、本開示におけるユーザ端末は、基地局で読み替えてもよい。この場合、上述のユーザ端末が有する機能を基地局が有する構成としてもよい。 Similarly, the user terminal in the present disclosure may be read as a base station. In this case, the base station may have the functions of the above-mentioned user terminal.
　本開示で使用する「判断(determining)」、「決定(determining)」という用語は、多種多様な動作を包含する場合がある。「判断」、「決定」は、例えば、判定(judging)、計算(calculating)、算出(computing)、処理(processing)、導出(deriving)、調査(investigating)、探索(looking　up、search、inquiry)（例えば、テーブル、データベース又は別のデータ構造での探索）、確認(ascertaining)した事を「判断」「決定」したとみなす事などを含み得る。また、「判断」、「決定」は、受信(receiving)（例えば、情報を受信すること）、送信(transmitting)(例えば、情報を送信すること)、入力(input)、出力(output)、アクセス(accessing)（例えば、メモリ中のデータにアクセスすること）した事を「判断」「決定」したとみなす事などを含み得る。また、「判断」、「決定」は、解決(resolving)、選択(selecting)、選定(choosing)、確立(establishing)、比較(comparing)などした事を「判断」「決定」したとみなす事を含み得る。つまり、「判断」「決定」は、何らかの動作を「判断」「決定」したとみなす事を含み得る。また、「判断（決定）」は、「想定する（assuming）」、「期待する（expecting）」、「みなす（considering）」などで読み替えられてもよい。 The terms "determining" and "determining" used in this disclosure may include a wide variety of actions. "Judgment" and "decision" are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as "judgment" or "decision". Also, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (Accessing) (for example, accessing data in memory) may be regarded as "judgment" or "decision". In addition, "judgment" and "decision" mean that the things such as solving, selecting, choosing, establishing, and comparing are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include considering some action as "judgment" and "decision". Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.
　「接続された(connected)」、「結合された(coupled)」という用語、又はこれらのあらゆる変形は、２又はそれ以上の要素間の直接的又は間接的なあらゆる接続又は結合を意味し、互いに「接続」又は「結合」された２つの要素間に１又はそれ以上の中間要素が存在することを含むことができる。要素間の結合又は接続は、物理的なものであっても、論理的なものであっても、或いはこれらの組み合わせであってもよい。例えば、「接続」は「アクセス」で読み替えられてもよい。本開示で使用する場合、２つの要素は、１又はそれ以上の電線、ケーブル及びプリント電気接続の少なくとも一つを用いて、並びにいくつかの非限定的かつ非包括的な例として、無線周波数領域、マイクロ波領域及び光（可視及び不可視の両方）領域の波長を有する電磁エネルギーなどを用いて、互いに「接続」又は「結合」されると考えることができる。 The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two "connected" or "combined" elements. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in the present disclosure, the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be "connected" or "coupled" to each other using electromagnetic energies having wavelengths in the microwave and light (both visible and invisible) regions.
　参照信号は、ＲＳ（Reference　Signal）と略称することもでき、適用される標準によってパイロット（Pilot）と呼ばれてもよい。 The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) depending on the applicable standard.
　本開示において使用する「に基づいて」という記載は、別段に明記されていない限り、「のみに基づいて」を意味しない。言い換えれば、「に基づいて」という記載は、「のみに基づいて」と「に少なくとも基づいて」の両方を意味する。 The phrase "based on" as used in this disclosure does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".
　本開示において使用する「第１の」、「第２の」などの呼称を使用した要素へのいかなる参照も、それらの要素の量又は順序を全般的に限定しない。これらの呼称は、２つ以上の要素間を区別する便利な方法として本開示において使用され得る。したがって、第１及び第２の要素への参照は、２つの要素のみが採用され得ること、又は何らかの形で第１の要素が第２の要素に先行しなければならないことを意味しない。 Any reference to elements using designations such as "first", "second", etc. as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.
　上記の各装置の構成における「手段」を、「部」、「回路」、「デバイス」等に置き換えてもよい。 The "means" in the configuration of each of the above devices may be replaced with a "part", a "circuit", a "device", or the like.
　本開示において、「含む（include）」、「含んでいる（including）」及びそれらの変形が使用されている場合、これらの用語は、用語「備える（comprising）」と同様に、包括的であることが意図される。さらに、本開示において使用されている用語「又は（or）」は、排他的論理和ではないことが意図される。 When "include", "including" and variations thereof are used in the present disclosure, these terms are as comprehensive as the term "comprising". Is intended. Furthermore, the term "or" used in the present disclosure is intended not to be an exclusive OR.
　無線フレームは時間領域において１つ又は複数のフレームによって構成されてもよい。時間領域において１つ又は複数の各フレームはサブフレームと呼ばれてもよい。サブフレームは更に時間領域において１つ又は複数のスロットによって構成されてもよい。サブフレームは、ニューメロロジ（numerology）に依存しない固定の時間長（例えば、１ｍｓ）であってもよい。 The wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further consist of one or more slots in the time domain. The subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
　ニューメロロジは、ある信号又はチャネルの送信及び受信の少なくとも一方に適用される通信パラメータであってもよい。ニューメロロジは、例えば、サブキャリア間隔（ＳＣＳ：SubCarrier　Spacing）、帯域幅、シンボル長、サイクリックプレフィックス長、送信時間間隔（ＴＴＩ：Transmission　Time　Interval）、ＴＴＩあたりのシンボル数、無線フレーム構成、送受信機が周波数領域において行う特定のフィルタリング処理、送受信機が時間領域において行う特定のウィンドウイング処理などの少なくとも１つを示してもよい。 The numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology includes, for example, subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, wireless frame configuration, and transmitter / receiver. At least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
　スロットは、時間領域において１つ又は複数のシンボル（ＯＦＤＭ（Orthogonal　Frequency　Division　Multiplexing）シンボル、ＳＣ-ＦＤＭＡ（Single　Carrier　Frequency　Division　Multiple　Access）シンボル等）で構成されてもよい。スロットは、ニューメロロジに基づく時間単位であってもよい。 The slot may be composed of one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.). Slots may be in time units based on numerology.
　スロットは、複数のミニスロットを含んでもよい。各ミニスロットは、時間領域において１つ又は複数のシンボルによって構成されてもよい。また、ミニスロットは、サブスロットと呼ばれてもよい。ミニスロットは、スロットよりも少ない数のシンボルによって構成されてもよい。ミニスロットより大きい時間単位で送信されるＰＤＳＣＨ（又はＰＵＳＣＨ）は、ＰＤＳＣＨ（又はＰＵＳＣＨ）マッピングタイプＡと呼ばれてもよい。ミニスロットを用いて送信されるＰＤＳＣＨ（又はＰＵＳＣＨ）は、ＰＤＳＣＨ（又はＰＵＳＣＨ）マッピングタイプＢと呼ばれてもよい。 The slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. The mini-slot may also be referred to as a sub-slot. A minislot may consist of a smaller number of symbols than the slot. PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
　無線フレーム、サブフレーム、スロット、ミニスロット及びシンボルは、いずれも信号を伝送する際の時間単位を表す。無線フレーム、サブフレーム、スロット、ミニスロット及びシンボルは、それぞれに対応する別の呼称が用いられてもよい。 The wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal. The radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
　例えば、１サブフレームは送信時間間隔（ＴＴＩ：Transmission　Time　Interval）と呼ばれてもよいし、複数の連続したサブフレームがＴＴＩと呼ばれてよいし、１スロット又は１ミニスロットがＴＴＩと呼ばれてもよい。つまり、サブフレーム及びＴＴＩの少なくとも一方は、既存のＬＴＥにおけるサブフレーム（１ｍｓ）であってもよいし、１ｍｓより短い期間（例えば、１－１３シンボル）であってもよいし、１ｍｓより長い期間であってもよい。なお、ＴＴＩを表す単位は、サブフレームではなくスロット、ミニスロットなどと呼ばれてもよい。 For example, one subframe may be called a transmission time interval (TTI), a plurality of consecutive subframes may be called TTI, and one slot or one minislot may be called TTI. You may. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be. The unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
　ここで、ＴＴＩは、例えば、無線通信におけるスケジューリングの最小時間単位のことをいう。例えば、ＬＴＥシステムでは、基地局が各端末２０に対して、無線リソース（各端末２０において使用することが可能な周波数帯域幅、送信電力など）を、ＴＴＩ単位で割り当てるスケジューリングを行う。なお、ＴＴＩの定義はこれに限られない。 Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station schedules each terminal 20 to allocate radio resources (frequency bandwidth that can be used in each terminal 20, transmission power, etc.) in TTI units. The definition of TTI is not limited to this.
　ＴＴＩは、チャネル符号化されたデータパケット（トランスポートブロック）、コードブロック、コードワードなどの送信時間単位であってもよいし、スケジューリング、リンクアダプテーションなどの処理単位となってもよい。なお、ＴＴＩが与えられたとき、実際にトランスポートブロック、コードブロック、コードワードなどがマッピングされる時間区間（例えば、シンボル数）は、当該ＴＴＩよりも短くてもよい。 The TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation. When a TTI is given, the time interval (for example, the number of symbols) to which the transport block, code block, code word, etc. are actually mapped may be shorter than the TTI.
　なお、１スロット又は１ミニスロットがＴＴＩと呼ばれる場合、１以上のＴＴＩ（すなわち、１以上のスロット又は１以上のミニスロット）が、スケジューリングの最小時間単位となってもよい。また、当該スケジューリングの最小時間単位を構成するスロット数（ミニスロット数）は制御されてもよい。 When one slot or one mini slot is called TTI, one or more TTIs (that is, one or more slots or one or more mini slots) may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
　１ｍｓの時間長を有するＴＴＩは、通常ＴＴＩ（ＬＴＥ　Ｒｅｌ．８－１２におけるＴＴＩ）、ノーマルＴＴＩ、ロングＴＴＩ、通常サブフレーム、ノーマルサブフレーム、ロングサブフレーム、スロットなどと呼ばれてもよい。通常ＴＴＩより短いＴＴＩは、短縮ＴＴＩ、ショートＴＴＩ、部分ＴＴＩ（partial又はfractional　TTI）、短縮サブフレーム、ショートサブフレーム、ミニスロット、サブスロット、スロットなどと呼ばれてもよい。 A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like. TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots and the like.
　なお、ロングＴＴＩ（例えば、通常ＴＴＩ、サブフレームなど）は、１ｍｓを超える時間長を有するＴＴＩで読み替えてもよいし、ショートＴＴＩ（例えば、短縮ＴＴＩなど）は、ロングＴＴＩのＴＴＩ長未満かつ１ｍｓ以上のＴＴＩ長を有するＴＴＩで読み替えてもよい。 The long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
　リソースブロック（ＲＢ）は、時間領域及び周波数領域のリソース割当単位であり、周波数領域において、１つ又は複数個の連続した副搬送波（subcarrier）を含んでもよい。ＲＢに含まれるサブキャリアの数は、ニューメロロジに関わらず同じであってもよく、例えば１２であってもよい。ＲＢに含まれるサブキャリアの数は、ニューメロロジに基づいて決定されてもよい。 The resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. The number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers contained in the RB may be determined based on numerology.
　また、ＲＢの時間領域は、１つ又は複数個のシンボルを含んでもよく、１スロット、１ミニスロット、１サブフレーム、又は１ＴＴＩの長さであってもよい。１ＴＴＩ、１サブフレームなどは、それぞれ１つ又は複数のリソースブロックで構成されてもよい。 Further, the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
　なお、１つ又は複数のＲＢは、物理リソースブロック（ＰＲＢ：Physical　RB）、サブキャリアグループ（ＳＣＧ：Sub-Carrier　Group）、リソースエレメントグループ（ＲＥＧ：Resource　Element　Group）、ＰＲＢペア、ＲＢペアなどと呼ばれてもよい。 One or more RBs include a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.
　また、リソースブロックは、１つ又は複数のリソースエレメント（ＲＥ：Resource　Element）によって構成されてもよい。例えば、１ＲＥは、１サブキャリア及び１シンボルの無線リソース領域であってもよい。 Further, the resource block may be composed of one or a plurality of resource elements (RE: Resource Element). For example, 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
　帯域幅部分（ＢＷＰ：Bandwidth　Part）（部分帯域幅などと呼ばれてもよい）は、あるキャリアにおいて、あるニューメロロジ用の連続する共通ＲＢ（common　resource　blocks）のサブセットのことを表してもよい。ここで、共通ＲＢは、当該キャリアの共通参照ポイントを基準としたＲＢのインデックスによって特定されてもよい。ＰＲＢは、あるＢＷＰで定義され、当該ＢＷＰ内で番号付けされてもよい。 Bandwidth part (BWP: Bandwidth Part) (which may also be called partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a certain neurology in a carrier. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.
　ＢＷＰには、ＵＬ用のＢＷＰ（ＵＬ　ＢＷＰ）と、ＤＬ用のＢＷＰ（ＤＬ　ＢＷＰ）とが含まれてもよい。ＵＥに対して、１キャリア内に１つ又は複数のＢＷＰが設定されてもよい。 The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs may be set in one carrier for the UE.
　設定されたＢＷＰの少なくとも１つがアクティブであってもよく、ＵＥは、アクティブなＢＷＰの外で所定の信号／チャネルを送受信することを想定しなくてもよい。なお、本開示における「セル」、「キャリア」などは、「ＢＷＰ」で読み替えられてもよい。 At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP. In addition, "cell", "carrier" and the like in this disclosure may be read as "BWP".
　上述した無線フレーム、サブフレーム、スロット、ミニスロット及びシンボルなどの構造は例示に過ぎない。例えば、無線フレームに含まれるサブフレームの数、サブフレーム又は無線フレームあたりのスロットの数、スロット内に含まれるミニスロットの数、スロット又はミニスロットに含まれるシンボル及びＲＢの数、ＲＢに含まれるサブキャリアの数、並びにＴＴＩ内のシンボル数、シンボル長、サイクリックプレフィックス（ＣＰ：Cyclic　Prefix）長などの構成は、様々に変更することができる。 The above-mentioned structures such as wireless frames, subframes, slots, mini slots and symbols are merely examples. For example, the number of subframes contained in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB. The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be changed in various ways.
　本開示において、例えば、英語でのa,　an及びtheのように、翻訳により冠詞が追加された場合、本開示は、これらの冠詞の後に続く名詞が複数形であることを含んでもよい。 In the present disclosure, if articles are added by translation, for example, a, an and the in English, the disclosure may include that the nouns following these articles are plural.
　本開示において、「ＡとＢが異なる」という用語は、「ＡとＢが互いに異なる」ことを意味してもよい。なお、当該用語は、「ＡとＢがそれぞれＣと異なる」ことを意味してもよい。「離れる」、「結合される」などの用語も、「異なる」と同様に解釈されてもよい。 In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". The term may mean that "A and B are different from C". Terms such as "separate" and "combined" may be interpreted in the same way as "different".
　本開示において説明した各態様／実施形態は単独で用いてもよいし、組み合わせて用いてもよいし、実行に伴って切り替えて用いてもよい。また、所定の情報の通知（例えば、「Ｘであること」の通知）は、明示的に行うものに限られず、暗黙的（例えば、当該所定の情報の通知を行わない）ことによって行われてもよい。 Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.
　なお、本開示において、ＤＣＩは、下りリンク制御情報の一例である。カテゴリ４は、ランダムバックオフを伴い、可変サイズのコンテンションウィンドウを使用するＬＢＴ（Listen Before Talk）を行うチャネルアクセス方法の一例である。 In this disclosure, DCI is an example of downlink control information. Category 4 is an example of a channel access method for performing LBT (Listen Before Talk) using a variable-sized contention window with random backoff.
　以上、本開示について詳細に説明したが、当業者にとっては、本開示が本開示中に説明した実施形態に限定されるものではないということは明らかである。本開示は、請求の範囲の記載により定まる本開示の趣旨及び範囲を逸脱することなく修正及び変更態様として実施することができる。したがって、本開示の記載は、例示説明を目的とするものであり、本開示に対して何ら制限的な意味を有するものではない。 Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure may be implemented as an amendment or modification without departing from the purpose and scope of the present disclosure, which is determined by the description of the scope of claims. Therefore, the description of the present disclosure is for the purpose of exemplary explanation and does not have any limiting meaning to the present disclosure.
１０　　　　基地局
１１０　　　送信部
１２０　　　受信部
１３０　　　設定部
１４０　　　制御部
２０　　　　端末
２１０　　　送信部
２２０　　　受信部
２３０　　　設定部
２４０　　　制御部
１００１　　プロセッサ
１００２　　記憶装置
１００３　　補助記憶装置
１００４　　通信装置
１００５　　入力装置
１００６　　出力装置 10 Base station 110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 20 Terminal 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

Claims (5)

  1. 　上りリンク送信を指示する下りリンク制御情報を基地局から受信する受信部と、
    　前記下りリンク制御情報に含まれる前記上りリンク送信に適用されるチャネルアクセス方式を示す情報に基づいて、前記下りリンク制御情報に含まれるフィールドを解釈する制御部と、
    　前記チャネルアクセス方式及び前記フィールドを解釈したパラメータを適用して前記上りリンク送信を前記基地局に実行する送信部とを有する端末。     A receiver that receives downlink control information instructing uplink transmission from the base station, and
    A control unit that interprets a field included in the downlink control information based on information indicating a channel access method applied to the uplink transmission included in the downlink control information.
    A terminal having a transmission unit that executes the uplink transmission to the base station by applying the channel access method and parameters that interpret the fields.
  2. 　前記制御部は、前記チャネルアクセス方式が、ランダムバックオフを伴い、可変サイズのコンテンションウィンドウを使用するＬＢＴ（Listen Before Talk）を行うチャネルアクセス方法である場合、前記フィールドを第１のパラメータを示すと解釈し、前記チャネルアクセス方式が、ランダムバックオフを伴い、可変サイズのコンテンションウィンドウを使用するＬＢＴを行うチャネルアクセス方法でない場合、前記フィールドを前記第１のパラメータと異なる第２のパラメータを示すと解釈する請求項１記載の端末。 The control unit indicates the first parameter in the field when the channel access method is a channel access method that performs LBT (Listen Before Talk) using a variable-sized contention window with random backoff. If the channel access method is not a channel access method that performs LBT using a variable-sized contention window with random backoff, the field indicates a second parameter different from the first parameter. The terminal according to claim 1, which is interpreted as.
  3. 　前記第１のパラメータは、ＣＡＰＣ（Channel Access Priority Class）であり、前記第２のパラメータは、ＣＰ（Cyclic Prefix）延長値である請求項２記載の端末。 The terminal according to claim 2, wherein the first parameter is CAPC (Channel Access Priority Class), and the second parameter is a CP (Cyclic Prefix) extension value.
  4. 　前記チャネルアクセス方式を示す情報は１ビット長であり、前記フィールドは２ビット長である請求項３記載の端末。 The terminal according to claim 3, wherein the information indicating the channel access method has a length of 1 bit, and the field has a length of 2 bits.
  5. 　上りリンク送信を指示する下りリンク制御情報を基地局から受信する受信手順と、
    　前記下りリンク制御情報に含まれる前記上りリンク送信に適用されるチャネルアクセス方式を示す情報に基づいて、前記下りリンク制御情報に含まれるフィールドを解釈する制御手順と、
    　前記チャネルアクセス方式及び前記フィールドを解釈したパラメータを適用して前記上りリンク送信を前記基地局に実行する送信手順とを端末が実行する通信方法。     A reception procedure for receiving downlink control information instructing uplink transmission from a base station, and
    A control procedure for interpreting a field included in the downlink control information based on information indicating a channel access method applied to the uplink transmission included in the downlink control information, and a control procedure for interpreting the fields included in the downlink control information.
    A communication method in which a terminal executes a transmission procedure for executing the uplink transmission to the base station by applying the channel access method and parameters interpreting the field.
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