WO2023007565A1 - 端末および無線通信方法 - Google Patents

端末および無線通信方法 Download PDF

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Publication number
WO2023007565A1
WO2023007565A1 PCT/JP2021/027612 JP2021027612W WO2023007565A1 WO 2023007565 A1 WO2023007565 A1 WO 2023007565A1 JP 2021027612 W JP2021027612 W JP 2021027612W WO 2023007565 A1 WO2023007565 A1 WO 2023007565A1
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WO
WIPO (PCT)
Prior art keywords
cell
terminal
pucch
pcell
base station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/027612
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English (en)
French (fr)
Japanese (ja)
Inventor
優元 ▲高▼橋
聡 永田
チーピン ピ
ジン ワン
ラン チン
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
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NTT Docomo Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to PCT/JP2021/027612 priority Critical patent/WO2023007565A1/ja
Priority to US18/291,459 priority patent/US20250105989A1/en
Priority to CN202180100964.1A priority patent/CN117751608A/zh
Priority to JP2023537771A priority patent/JP7747753B2/ja
Publication of WO2023007565A1 publication Critical patent/WO2023007565A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • the present disclosure relates to terminals and wireless communication methods.
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunication System
  • LTE-A Long Term Evolution-Advanced
  • FAA Future Radio Access
  • 5G 5th generation mobile communication system
  • 5G+ 5th generation mobile communication system
  • New-RAT Radio Access Technology
  • NR Radio
  • Non-Patent Document 1 For example, in NR, strengthening the function of feedback from terminals to base stations is under consideration in order to improve communication quality (for example, Non-Patent Document 1).
  • PUCCH Physical Uplink Control Channel
  • Semi-static PUCCH carrier switching operation is performed based on the timing pattern of the cell transmitting PUCCH. Based on the pattern, the terminal determines a cell to be used for transmitting information to be fed back to the base station.
  • One aspect of the present disclosure provides a terminal and a radio communication method that can appropriately determine the cell used for transmitting information fed back from the terminal to the base station.
  • a terminal includes a control unit that determines a cell that transmits the control information based on a timing pattern that indicates the order of cells that transmit control information, and transmits the control information in the determined cell. and a transmitting unit that performs the above-mentioned transmission, and if the Scell to be deactivated is included in the timing pattern, the timing pattern is changed before the Scell is deactivated.
  • a wireless communication method wherein a terminal determines a cell for transmitting the control information based on a timing pattern indicating the order of cells for transmitting control information, and the control information in the determined cell and the timing pattern includes a deactivated Scell, the timing pattern is changed.
  • FIG. 4 is a diagram showing an example of PUCCH carrier switching
  • FIG. 10 illustrates an example of PUCCH cell determination based on PUCCH cell timing patterns
  • 2 is a block diagram showing an example of the configuration of a base station according to one embodiment
  • FIG. 1 is a block diagram showing an example of a configuration of a terminal according to one embodiment
  • FIG. 10 is a diagram showing an example of PUCCH cell determination in Opt 2-1
  • FIG. 10 is a diagram showing an example of PUCCH cell determination in Opt 2-2A
  • FIG. 10 is a diagram illustrating an example of PUCCH cell determination in Opt 2-2B
  • FIG. 10 is a diagram showing an example of PUCCH cell determination in Opt 2-3A;
  • FIG. 10 is a diagram showing an example of PUCCH cell determination in Opt 2-3B; It is a figure which shows an example of the hardware configuration of the base station and terminal which concern on one Embodiment.
  • HARQ-ACK Hybrid Automatic Repeat request - Acknowledgment
  • HARQ-ACK is an example of information related to acknowledgment (eg, acknowledgment) for data received by the terminal.
  • PUCCH carrier switching may be called by another name such as carrier switching for control information transmission.
  • PUCCH carrier switching is a technique applied when a base station communicates through multiple cells. Dual connectivity, which is an example of communication via multiple cells, and PUCCH carrier switching will be described below.
  • FIG. 1 is a diagram illustrating an example of dual connectivity (DC).
  • base station 10-1 may be a MasterNode (MN).
  • Base station 10-2 may be a secondary node (SN).
  • DC bundles carriers between different base stations.
  • the base station 10-1 communicates with the terminal 20 via a primary cell (Pcell) and a secondary cell (Scell).
  • Pcell primary cell
  • Scell secondary cell
  • terminal 20 has established an RRC connection with base station 10-1.
  • the uplink control information (eg, UCI) received by the Pcell of the base station 10-1 is transferred to the backhaul Notify the base station 10-2 via a link (for example, a wired or wireless link connecting the base station 10-1 and the base station 10-2) and reflect it in the scheduling of Scell under the base station 10-2.
  • a link for example, a wired or wireless link connecting the base station 10-1 and the base station 10-2
  • one carrier under the control of the base station 10-2 may be set as the Primary Scell (PScell), and PUCCH transmission may be supported by the PScell.
  • PScell Primary Scell
  • terminal 20 transmits UCI to base station 10-2 via PScell.
  • the terminal 20 sets Scell in addition to Pcell for the base station 10-1. Also, the terminal 20 sets Scell in addition to PScell for the base station 10-2.
  • the terminal 20 transmits the UCI of each carrier under the control of the base station 10-1 on the PUCCH of the Pcell. Also, the terminal 20 transmits the UCI of each carrier under the control of the base station 10-2 on PUCCH of the PScell.
  • the cell group (CG) under the base station 10-1 may be called MasterCell-Group (MCG).
  • a cell group under the base station 10-2 may be called a Secondary Cell-Group (SCG).
  • terminal 20 transmits PUCCH via Pcell, PScell, and/or PUCCH-Scell. In general, it is not assumed that the terminal 20 transmits PUCCH via Scells other than Pcell, PScell, and PUCCH-Scell.
  • PUCCH carrier switching is being studied as a method of reducing HARQ-ACK feedback latency in the Time Division Duplex (TDD) system.
  • FIG. 2 is a diagram showing an example of PUCCH carrier switching.
  • the base station 10 and the terminal 20 are communicating via cell 1 and cell 2.
  • cell 1 is Pcell and cell 2 is Scell.
  • the example of FIG. 2 also shows downlink (DL) slots and uplink (UL) slots in each cell.
  • the terminal 20 receives data (receives PDSCH) at the timing of S101.
  • the terminal 20 attempts to transmit HARQ-ACK for the data received in S101 at the timing of S102, but at the timing of S102, the cell 1 slot is a downlink (DL) slot. Therefore, when the terminal 20 transmits HARQ-ACK in cell1, HARQ-ACK transmission is suspended until the PUCCH transmission timing in the uplink (UL) slot (for example, the timing of S103 in FIG. 2). , the latency of HARQ-ACK transmission increases.
  • the PUCCH transmission timing in the uplink (UL) slot may be referred to as a PUCCH transmission opportunity.
  • the slot of cell 2 is the UL slot at the timing of S102.
  • the terminal 20 can transmit HARQ-ACK for the data received in S101 at the PUCCH transmission opportunity of cell 2 at the timing of S102, the latency of HARQ-ACK transmission can be reduced.
  • URLLC particularly requires low delay in the radio section. For this reason, 3GPP is considering PUCCH carrier switching in which the terminal 20 switches the carrier for PUCCH transmission as an extension of the URLLLC technology.
  • the "same timing" may be completely the same timing, or may be a time resource (for example, one or more symbols (a resource in time units shorter than a symbol) may be the same or overlap.
  • PUCCH carrier switching means that when terminal 20 attempts to transmit PUCCH at a specific transmission timing of Pcell (may be PScell or PUCCH-Scell), Pcell (may be PScell or PUCCH-Scell) Since the slot of the specific transmission timing of the DL slot is a DL slot, the terminal 20 selects a cell that transmits PUCCH from the Pcell (may be PScell or PUCCH-Scell) from the specific One of one or more Scells in which the slot with the same timing as the transmission timing is the UL slot (in the case of PScell, it is a Scell other than PScell, and in the case of PUCCH-Scell, PUCCH-Scell It may be to switch to Scell other than Scell).
  • the specific transmission timing unit is not limited to the slot.
  • the specific transmission timing may be timing in units of subframes or timing in units of symbols.
  • the first method is a method in which the base station 10 dynamically instructs the terminal 20 of a carrier for PUCCH transmission.
  • the second method is a method in which the base station 10 semi-statically sets the carrier for PUCCH transmission to the terminal 20 . It should be noted that, in the following embodiments, "transmitting PUCCH” and “transmitting PUCCH” may mean transmitting uplink control information via PUCCH.
  • the terminal 20 may notify the base station 10 of terminal capability information (UE capability) that defines information about the capability of the terminal regarding PUCCH transmission.
  • UE capability terminal capability information
  • information indicating whether or not the terminal 20 supports switching settings related to transmission of control information may be defined.
  • Switching settings for transmission of control information may be, for example, switching resources (for example, carriers) used for transmission of control information. Switching resources used for transmitting control information may be referred to as "PUCCH carrier switching.”
  • Information indicating whether or not the terminal 20 supports PUCCH carrier switching based on DCI associated with the PUCCH may be defined as the terminal capability information of the terminal 20 .
  • Information indicating whether or not the terminal 20 supports PUCCH carrier switching based on DCI that is not associated with PUCCH may be defined as the terminal capability information of the terminal 20 .
  • PUCCH resource configuration is per UL BWP (Uplink Bandwidth Part) (eg, per candidate cell and the UL BWP of that candidate cell).
  • UL BWP Uplink Bandwidth Part
  • the semi-static PUCCH carrier switching operation is based on the PUCCH cell timing pattern (hereinafter sometimes simply referred to as "pattern") and supports PUCCH carrier switching between cells with different numerologies.
  • the PUCCH cell timing pattern is a pattern indicating the order of cells that transmit PUCCH (control information).
  • Pcell and two Scells are cells that support PUCCH transmission, that is, cells that may transmit PUCCH (hereinafter referred to as "candidate PUCCH cells").
  • base station 10 and terminal 20 each have a pattern table that indicates the relationship between multiple PUCCH cell timing patterns and indexes associated with each pattern.
  • RRC Radio Resource Control
  • the valid PUCCH cell timing pattern is (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2) with index value "0".
  • the terminal 20 determines the PUCCH cell according to the valid pattern.
  • PUCCH resources are indicated by gray coloring.
  • the terminal 20 repeatedly uses the notified pattern, and after slot #6, according to the valid pattern (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2) Determine the PUCCH cell.
  • the terminal 20 transmits UCI via Pcell in slots #0, #1, and #2, transmits UCI via cell 1 in slot #3, and transmits cell 2 in slots #4 and #5.
  • a terminal and a wireless communication method that can appropriately determine the cell used for information transmission even when Scell is deactivated will be provided.
  • the radio communication system includes base station 10 shown in FIG. 4 and terminal 20 shown in FIG.
  • the number of base stations 10 and the number of terminals 20 are not particularly limited.
  • the wireless communication system may be a wireless communication system according to New Radio (NR).
  • NR New Radio
  • the wireless communication system may be a wireless communication system according to a scheme called URLLC and/or IIoT.
  • the wireless communication system may be a wireless communication system that conforms to a system called 5G, Beyond 5G, 5G Evolution, or 6G.
  • the base station 10 may be called an NG-RAN Node, ng-eNB, eNodeB (eNB), or gNodeB (gNB).
  • the terminal 20 may be called User Equipment (UE).
  • the base station 10 may be regarded as a device included in the network to which the terminal 20 connects.
  • the radio communication system may include Next Generation-Radio Access Network (NG-RAN).
  • NG-RAN includes multiple NG-RAN Nodes, specifically gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown).
  • 5GC 5G-compliant core network
  • NG-RAN and 5GC may be simply referred to as "networks”.
  • the base station 10 performs wireless communication with the terminal 20.
  • the wireless communication performed complies with NR.
  • At least one of the base station 10 and the terminal 20 uses Massive MIMO (Multiple-Input Multiple-Output) to generate beams (BM) with higher directivity by controlling radio signals transmitted from a plurality of antenna elements. You can respond.
  • at least one of the base station 10 and the terminal 20 may support carrier aggregation (CA) that uses multiple component carriers (CC) in a bundle.
  • CA carrier aggregation
  • CC component carriers
  • at least one of the base station 10 and the terminal 20 may support dual connectivity (DC), etc., in which communication is performed between the terminal 20 and each of the plurality of base stations 10 .
  • a wireless communication system may support multiple frequency bands.
  • a wireless communication system supports Frequency Ranges (FR) 1 and FR2.
  • the frequency bands of each FR are, for example, as follows. ⁇ FR1: 410MHz to 7.125GHz ⁇ FR2: 24.25GHz to 52.6GHz
  • FR1 Sub-Carrier Spacing (SCS) of 15 kHz, 30 kHz or 60 kHz may be used, and a bandwidth (BW) of 5 MHz to 100 MHz may be used.
  • SCS Sub-Carrier Spacing
  • BW bandwidth
  • FR2 is, for example, a higher frequency than FR1.
  • FR2 may use an SCS of 60 kHz or 120 kHz and a bandwidth (BW) of 50 MHz to 400 MHz.
  • FR2 may include a 240 kHz SCS.
  • the wireless communication system in this embodiment may support a frequency band higher than the frequency band of FR2.
  • the wireless communication system in this embodiment can support frequency bands exceeding 52.6 GHz and up to 114.25 GHz.
  • Such high frequency bands may be referred to as "FR2x.”
  • Cyclic Prefix-Orthogonal Frequency Division Multiplexing CP-OFDM
  • DFT-S-OFDM Discrete Fourier Transform - Spread - Orthogonal Frequency Division Multiplexing
  • SCS Sub-Carrier Spacing
  • DFT-S-OFDM may be applied to both uplink and downlink, or may be applied to either one.
  • a time division duplex (TDD) slot configuration pattern may be set.
  • slots for transmitting downlink (DL) signals, slots for transmitting uplink (UL) signals, slots in which DL signals, UL signals and guard symbols are mixed, and signals to be transmitted are flexible
  • a pattern may be defined that indicates the order of two or more of the slots to be changed to .
  • channel estimation of PUSCH can be performed using a demodulation reference signal (DMRS) for each slot.
  • DMRS demodulation reference signal
  • Such channel estimation may be called joint channel estimation. Alternatively, it may be called by another name such as cross-slot channel estimation.
  • the terminal 20 may transmit the DMRS assigned to each of the multiple slots so that the base station 10 can perform joint channel estimation using DMRS.
  • an enhanced function may be added to the feedback function from the terminal 20 to the base station 10.
  • enhanced functionality of terminal feedback for HARQ-ACK may be added.
  • the configurations of the base station 10 and the terminal 20 will be explained.
  • the configurations of base station 10 and terminal 20 described below are examples of functions related to the present embodiment.
  • the base station 10 and terminal 20 may have functions not shown.
  • the functional division and/or the name of the functional unit are not limited as long as the function executes the operation according to the present embodiment.
  • FIG. 4 is a block diagram showing an example of the configuration of base station 10 according to this embodiment.
  • the base station 10 includes a transmitter 101, a receiver 102, and a controller 103, for example.
  • the base station 10 wirelessly communicates with the terminal 20 (see FIG. 5).
  • the transmission section 101 transmits a downlink (DL) signal to the terminal 20 .
  • the transmitter 101 transmits a DL signal under the control of the controller 103 .
  • a DL signal may include, for example, a downlink data signal and control information (eg, Downlink Control Information (DCI)).
  • DCI Downlink Control Information
  • the DL signal may include information (for example, UL grant) indicating scheduling regarding signal transmission of the terminal 20 .
  • the DL signal may include higher layer control information (for example, Radio Resource Control (RRC) control information).
  • RRC Radio Resource Control
  • the DL signal may include a reference signal.
  • Channels used for transmitting DL signals include, for example, data channels and control channels.
  • the data channel may include a PDSCH (Physical Downlink Shared Channel)
  • the control channel may include a PDCCH (Physical Downlink Control Channel).
  • the base station 10 transmits control information to the terminal 20 using the PDCCH, and transmits downlink data signals using the PDSCH.
  • reference signals included in DL signals include demodulation reference signals (DMRS), phase tracking reference signals (PTRS), channel state information-reference signals (CSI-RS), sounding reference signals (SRS ), and Positioning Reference Signal (PRS) for position information.
  • DMRS demodulation reference signals
  • PTRS phase tracking reference signals
  • CSI-RS channel state information-reference signals
  • SRS sounding reference signals
  • PRS Positioning Reference Signal
  • reference signals such as DMRS and PTRS are used for demodulation of downlink data signals and transmitted using PDSCH.
  • the receiving unit 102 receives an uplink (UL) signal transmitted from the terminal 20 .
  • the receiver 102 receives UL signals under the control of the controller 103 .
  • the control unit 103 controls the communication operation of the base station 10, including the transmission processing of the transmission unit 101 and the reception processing of the reception unit 102.
  • control unit 103 acquires information such as data and control information from the upper layer and outputs it to the transmission unit 101 .
  • Control section 103 also outputs the data received from receiving section 102, control information, and the like to an upper layer.
  • control unit 103 based on the signal received from the terminal 20 (e.g., data and control information, etc.) and / or data and control information obtained from the upper layer, resource (or channel) used for transmission and reception of the DL signal and/or allocates resources used for transmission and reception of UL signals. Information about the allocated resources may be included in control information to be transmitted to the terminal 20 .
  • the control unit 103 sets PUCCH resources as an example of allocation of resources used for transmission and reception of UL signals.
  • Information related to PUCCH configuration such as the PUCCH cell timing pattern may be notified to the terminal 20 by RRC.
  • FIG. 5 is a block diagram showing an example of the configuration of terminal 20 according to this embodiment.
  • Terminal 20 includes, for example, receiver 201 , transmitter 202 , and controller 203 .
  • the terminal 20 communicates with the base station 10 by radio, for example.
  • the receiving unit 201 receives the DL signal transmitted from the base station 10. For example, the receiver 201 receives a DL signal under the control of the controller 203 .
  • the transmission unit 202 transmits the UL signal to the base station 10.
  • the transmitter 202 transmits UL signals under the control of the controller 203 .
  • the UL signal may include, for example, an uplink data signal and control information (eg, UCI).
  • control information eg, UCI
  • information about the processing capability of terminal 20 eg, UE capability
  • the UL signal may include a reference signal.
  • Channels used to transmit UL signals include, for example, data channels and control channels.
  • the data channel includes PUSCH (Physical Uplink Shared Channel)
  • the control channel includes PUCCH (Physical Uplink Control Channel).
  • the terminal 20 receives control information from the base station 10 using PUCCH, and transmits uplink data signals using PUSCH.
  • the reference signal included in the UL signal may include at least one of DMRS, PTRS, CSI-RS, SRS, and PRS, for example.
  • reference signals such as DMRS and PTRS are used for demodulation of uplink data signals and transmitted using an uplink channel (eg, PUSCH).
  • the control unit 203 controls communication operations of the terminal 20, including reception processing in the reception unit 201 and transmission processing in the transmission unit 202.
  • control unit 203 acquires information such as data and control information from the upper layer and outputs it to the transmission unit 202 . Also, the control unit 203 outputs, for example, the data and control information received from the receiving unit 201 to the upper layer.
  • control unit 203 controls transmission of information to be fed back to the base station 10 .
  • Information fed back to the base station 10 may include, for example, HARQ-ACK, channel state information (CSI), or scheduling request (SR). good.
  • Information to be fed back to the base station 10 may be included in the UCI.
  • UCI is transmitted on PUCCH resources.
  • the control unit 203 configures PUCCH resources based on configuration information received from the base station 10 (for example, configuration information such as the PUCCH cell timing pattern notified by RRC and/or DCI).
  • Control section 203 determines PUCCH resources to be used for transmitting information to be fed back to base station 10 .
  • transmission section 202 transmits information to be fed back to base station 10 on PUCCH resources determined by control section 203 .
  • the channels used for DL signal transmission and the channels used for UL signal transmission are not limited to the above examples.
  • the channel used for DL signal transmission and the channel used for UL signal transmission may include RACH (Random Access Channel) and PBCH (Physical Broadcast Channel).
  • RACH may be used, for example, to transmit Downlink Control Information (DCI) containing Random Access Radio Network Temporary Identifier (RA-RNTI).
  • DCI Downlink Control Information
  • RA-RNTI Random Access Radio Network Temporary Identifier
  • the base station 10 controls updating the PUCCH cell timing pattern before Scell is deactivated. Note that in Option 1, the terminal 20 does not need to perform control assuming Scells to be deactivated in the PUCCH cell timing pattern.
  • the base station 10 notifies the terminal 20 of the index value indicating the updated PUCCH cell timing pattern before starting the PUCCH cell timing pattern used at the timing when Scell is deactivated.
  • the base station 10 sets the index value "2" of the pattern (Pcell, Pcell, Pcell, cell 1, Pcell, Pcell) that does not use cell 2 as a PUCCH cell to the terminal before slot #0. 20.
  • Terminal 20 determines a PUCCH cell based on the updated pattern (Pcell, Pcell, Pcell, cell 1, Pcell, Pcell) from slot #0 onwards.
  • terminal 20 transmits UCI via Pcell in slots #0, #1, and #2, transmits UCI via cell 1 in slot #3, and transmits UCI via Pcell in slots #4 and #5. to send UCI.
  • Opt 1-1 has the advantage that the pattern can be switched from the beginning of the PUCCH cell timing pattern, so the impact on the specifications is minimal.
  • Semi-static PUCCH cell timing patterns may be updated by dynamic indications.
  • base station 10 notifies terminal 20 of an index value indicating the updated PUCCH cell timing pattern before the timing at which Scell is deactivated.
  • Opt 1-2 has the advantage of being able to switch patterns even in the middle of the PUCCH cell timing pattern, so the PUCCH cell timing pattern can be updated flexibly.
  • Opt 1-2 has the following variations.
  • terminal 20 when terminal 20 receives an index value indicating a new PUCCH cell timing pattern, it performs PUCCH carrier switching according to the new PUCCH cell timing pattern.
  • the base station 10 sets the index value "2" of the pattern (Pcell, Pcell, Pcell, cell 1, Pcell, Pcell) that does not use cell 2 as a PUCCH cell to the terminal before slot #5. 20.
  • Terminal 20 determines the PUCCH cell from slot #5 based on the updated pattern (Pcell, Pcell, Pcell, cell 1, Pcell, Pcell).
  • terminal 20 transmits UCI via Pcell in slots #0, #1, and #2, UCI via cell 1 in slot #3, and UCI via cell 2 in slot #4. and UCI is transmitted via Pcell in slot #5.
  • the base station 10 sets the index value #i indicating the deactivated cell 2 and the index value #j indicating the replaced cell 1 to the terminal. 20.
  • the terminal 20 receives from slot #5 a pattern in which cell 2 in the valid patterns (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2) is replaced with cell 1, that is, the pattern (Pcell, Pcell, Pcell, Determine the PUCCH cell based on cell 1, cell 1, cell 1).
  • terminal 20 transmits UCI via Pcell in slots #0, #1, and #2, UCI via cell 1 in slot #3, and UCI via cell 2 in slot #4. and transmit UCI via cell 1 in slot #5.
  • the cell to be replaced is fixed (for example, Pcell), and only the index value #i indicating the Scell to be deactivated is notified to the terminal 20.
  • the base station 10 notifies the terminal 20 of the index value #i indicating the cell 2 to be deactivated.
  • Terminal 20 receives from slot #5 a pattern in which cell 2 in the valid patterns (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2) is replaced with Pcell, that is, the pattern (Pcell, Pcell, Pcell, cell 1, Pcell, Pcell) to determine the PUCCH cell.
  • terminal 20 transmits UCI via Pcell in slots #0, #1, and #2, UCI via cell 1 in slot #3, and UCI via cell 2 in slot #4. and UCI is transmitted via Pcell in slot #5.
  • the dynamic instruction may be notified to the terminal 20 by DCI or may be notified to the terminal 20 by MAC CE. This allows the base station 10 implementation to ensure that no PUCCH cells of the current PUCCH cell timing pattern are deactivated.
  • the DCI format may be either a new DCI format or an existing DCI format with new or existing unused fields (eg, FDRA field).
  • terminal 20 determines whether the received DCI should be interpreted for pattern update purposes or for other purposes. Some specific DCI fields can be used to do this. For example, if the HARQ process, TDRA, SRI, TPMI, etc. fields are all '0', the FDRA field is reinterpreted for pattern update purposes.
  • DCI indicates mapping for cell replacement for Opt 1-2B, and new PUCCH cell timing pattern for Opt 1-2A.
  • a new MAC CE may be introduced.
  • it may be enhanced based on Scell activation/de-activation MAC CE to display dynamic instructions along with Scell activation/deactivation indications.
  • Option 2 defines a rule when any Scell in the PUCCH cell timing pattern may be deactivated, and the terminal 20 performs control according to the rule.
  • the terminal 20 is notified of information indicating the timing of Scell activation/deactivation. Notification of information includes physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or these may be implemented by a combination of physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or these may be implemented by a combination of physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or these may be implemented by a combination of physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC signaling,
  • the activation of Scell may be used as a trigger to re-enable the semi-static PUCCH carrier switching. That is, semi-static PUCCH carrier switching is enabled when a deactivated cell within the configured PUCCH cell timing pattern is activated again.
  • Pcell and two Scells (cell 1, cell 2) are assumed to be candidate PUCCH cells.
  • the valid PUCCH cell timing pattern is (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2).
  • cell 2 is deactivated from slot #5 and cell 2 is activated again from slot #n+4.
  • terminal 20 determines PUCCH cells according to valid patterns (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2) in slots #0 to #4 where cell 2 is activated. As a result, terminal 20 transmits UCI via Pcell in slots #0, #1, and #2, UCI via cell 1 in slot #3, and UCI via cell 2 in slot #4. to send.
  • terminal 20 disables PUCCH carrier switching in slots #5 to #n+4 in which cell 2 is deactivated, and always determines PCell as a PUCC cell. As a result, the terminal 20 transmits UCI via Pcell in slots #5 to #n+4.
  • terminal 20 determines a PUCCH cell according to a valid pattern (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2) from slot #n+5 where cell 2 is activated again.
  • Opt 2-2 has the following variations.
  • Terminal 20 activates another PUCCH cell timing pattern that includes only the activated cell.
  • a plurality of preset PUCCH cell timing patterns are ordered, and terminal 20 selects the pattern with the highest order among the patterns containing only activated cells.
  • Opt 2-2A A specific example of Opt 2-2A will be explained using FIG.
  • Pcell and two Scells (cell 1, cell 2) are assumed to be candidate PUCCH cells.
  • the valid PUCCH cell timing pattern until cell 2 is deactivated is (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2).
  • terminal 20 determines PUCCH cells according to valid patterns (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2) in slots #0 to #4 where cell 2 is activated. As a result, terminal 20 transmits UCI via Pcell in slots #0, #1, and #2, UCI via cell 1 in slot #3, and UCI via cell 2 in slot #4. to send.
  • terminal 20 disables PUCCH carrier switching up to that point from slot #5 where cell 2 is deactivated, and uses a new pattern (Pcell, cell 1) including only activated cells (Pcell, cell 1) Determine the PUCCH cell according to Pcell, Pcell, cell 1, Pcell, Pcell). Also, the terminal 20 transmits the index value “2” of the new pattern to the base station 10 .
  • terminal 20 transmits UCI via Pcell in slot #5.
  • terminal 20 transmits UCI via Pcell in slots #n+0, #n+1, and #n+2, transmits UCI via cell 1 in slot #n+3, and transmits UCI in slot #n +4, #n+5 sends UCI via Pcell.
  • Terminal 20 updates the PUCCH cell timing pattern by replacing the deactivated Scell with another activated cell.
  • the cell to be replaced may be determined by any of the following rules.
  • candidate PUCCH cell set may be any of the following.
  • the candidate PUCCH cell set is configured by RRC.
  • a cell set is configured for PUCCH cell selection when a PUCCH cell is deactivated.
  • Candidate PUCCH cell set is the set of activated cells with PUCCH resource configuration, either in the same band as the current deactivated cell, or in a different band, and/or Alternatively, it is a set of cells that satisfy conditions such as whether they are the same SCS or different SCSs.
  • a cell to be replaced may be selected from among the candidate PUCCH cell sets based on the cell index, SCS, carrier frequency, DL/UL resource ratio, bandwidth, and the like.
  • FIG. 8 A specific example of Opt 2-2B will be explained using FIG.
  • Pcell and two Scells (cell 1, cell 2) are assumed to be candidate PUCCH cells.
  • the valid PUCCH cell timing pattern until cell 2 is deactivated is (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2).
  • terminal 20 determines PUCCH cells according to valid patterns (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2) in slots #0 to #4 where cell 2 is activated. As a result, terminal 20 transmits UCI via Pcell in slots #0, #1, and #2, UCI via cell 1 in slot #3, and UCI via cell 2 in slot #4. to send.
  • terminal 20 disables PUCCH carrier switching up to that point from slot #5 where cell 2 is deactivated, and valid patterns (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2) PUCCH cell is determined based on the pattern (Pcell, Pcell, Pcell, cell 1, Pcell, Pcell) in which cell 2 in is replaced with Pcell. If the cell to be replaced is not fixed, terminal 20 transmits an index value (#i) indicating the cell to be replaced to base station 10 .
  • terminal 20 transmits UCI via Pcell in slot #5.
  • terminal 20 transmits UCI via Pcell in slots #n+0, #n+1, and #n+2, transmits UCI via cell 1 in slot #n+3, and transmits UCI in slot #n +4, #n+5 sends UCI via Pcell.
  • Opt 2-3 does not update the PUCCH cell timing pattern. That is, in Opt 2-3, if the deactivated Scell(s) within the PUCCH cell timing pattern are reactivated, the PUCCH timing pattern continues to be used.
  • Opt 2-3 has the following variations.
  • Terminal 20 temporarily uses another PUCCH cell timing pattern that includes only activated cells.
  • PUCCH cell timing pattern determination methods may be the same as the method of Opt 2-2A above.
  • Pcell and two Scells (cell 1, cell 2) are assumed to be candidate PUCCH cells.
  • the valid PUCCH cell timing pattern until cell 2 is deactivated is (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2).
  • terminal 20 determines PUCCH cells according to valid patterns (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2) in slots #0 to #4 where cell 2 is activated. As a result, terminal 20 transmits UCI via Pcell in slots #0, #1, and #2, UCI via cell 1 in slot #3, and UCI via cell 2 in slot #4. to send.
  • terminal 20 temporarily disables PUCCH carrier switching until cell 2 is activated again, and activates cells (Pcell , cell 1) to determine the PUCCH cell according to a new pattern (Pcell, Pcell, Pcell, cell 1, Pcell, Pcell). Also, the terminal 20 transmits the index value “2” of the new pattern to the base station 10 .
  • terminal 20 transmits UCI via Pcell in slot #5. Also, the terminal 20 transmits UCI via Pcell in slots #n+0, #n+1, and #n+2.
  • terminal 20 determines a PUCCH cell according to the previous pattern (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2). As a result, terminal 20 transmits UCI via cell 1 in slot #n+3, and UCI via cell 2 in slots #n+4 and #n+5.
  • the method of determining other activated cells to be replaced may be the same as the method of Opt 2-2B above.
  • Pcell and two Scells (cell 1, cell 2) are assumed to be candidate PUCCH cells.
  • the valid PUCCH cell timing pattern until cell 2 is deactivated is (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2).
  • terminal 20 determines PUCCH cells according to valid patterns (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2) in slots #0 to #4 where cell 2 is activated. As a result, terminal 20 transmits UCI via Pcell in slots #0, #1, and #2, UCI via cell 1 in slot #3, and UCI via cell 2 in slot #4. to send.
  • terminal 20 temporarily disables PUCCH carrier switching from slot #5 onwards in which cell 2 is deactivated, and valid patterns (Pcell, Pcell, Pcell, cell 1, cell 2, Determine the PUCCH cell based on the pattern (Pcell, Pcell, Pcell, cell 1, Pcell, Pcell) in which cell 2 in cell 2) is replaced with Pcell. If the cell to be replaced is not fixed, terminal 20 transmits an index value (#i) indicating the cell to be replaced to base station 10 .
  • terminal 20 transmits UCI via Pcell in slot #5. Also, the terminal 20 transmits UCI via Pcell in slots #n+0, #n+1, and #n+2.
  • terminal 20 determines a PUCCH cell according to the previous pattern (Pcell, Pcell, Pcell, cell 1, cell 2, cell 2). As a result, terminal 20 transmits UCI via cell 1 in slot #n+3, and UCI via cell 2 in slots #n+4 and #n+5.
  • the terminal 20 when semi-static PUCCH carrier switching is performed based on the PUCCH cell timing pattern, even when Scell is deactivated, the terminal 20 always A PUCCH can be set up in an activated cell to transmit UCI.
  • any one of multiple options is applied for one setting, and/or one of multiple options (Alt. 1, Alt. 2, etc. in the above description) is applied for one setting.
  • which of multiple options applies and/or which of multiple options applies may be determined in the following manner.
  • Set by upper layer parameters. The UE reports as UE capability(ies). - Described in the specifications. • Determined based on higher layer parameter settings and reported UE capabilities. • Determined by a combination of two or more of the above determinations.
  • the upper layer parameters may be RRC parameters, MAC CE (Media Access Control Element), or a combination thereof.
  • the UE capability indicating the capability of the UE may include information indicating the following capabilities of the UE. Note that the information indicating the capabilities of the UE may correspond to information defining the capabilities of the UE. - Information defining whether the UE supports PUCCH carrier switching. - Information defining whether the UE supports semi-static PUCCH carrier switching. - Information defining whether the UE supports semi-static PUCCH carrier switching based on Scel activation/deactivation. - Information defining whether the UE supports PUCCH cell timing pattern update based on dynamic indication. • Information defining whether the UE supports PUCCH cell timing pattern update based on Scell activation/deactivation rules. - Information defining whether the UE supports temporary PUCCH cell timing patterns that are used when any cell in the PUCCH cell timing pattern is deactivated.
  • each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
  • a functional block may be implemented by combining software in the one device or the plurality of devices.
  • Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't
  • a functional block (component) that performs transmission is called a transmitting unit or transmitter.
  • the implementation method is not particularly limited.
  • a base station, a terminal, etc. may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 11 is a diagram illustrating an example of hardware configurations of a base station and terminals according to an embodiment of the present disclosure.
  • the base station 10 and terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.
  • the term "apparatus” can be read as a circuit, device, unit, or the like.
  • the hardware configuration of the base station 10 and terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.
  • Each function of the base station 10 and the terminal 20 is performed by the processor 1001 by loading predetermined software (program) onto hardware such as the processor 1001 and the memory 1002, and the processor 1001 performs calculations and controls communication by the communication device 1004. , and controlling at least one of reading and writing of data in the memory 1002 and the storage 1003 .
  • the processor 1001 for example, operates an operating system and controls the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like.
  • CPU central processing unit
  • the control unit 103 and the control unit 203 described above may be implemented by the processor 1001 .
  • the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them.
  • programs program codes
  • software modules software modules
  • data etc.
  • the program a program that causes a computer to execute at least part of the operations described in the above embodiments is used.
  • the control unit 103 of the base station 10 or the control unit 203 of the terminal 20 may be implemented by a control program stored in the memory 1002 and operating in the processor 1001, and other functional blocks may be implemented in the same way. good.
  • FIG. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.
  • the memory 1002 is a computer-readable recording medium, and is composed of at least one of, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. may be
  • ROM Read Only Memory
  • EPROM Erasable Programmable ROM
  • EEPROM Electrical Erasable Programmable ROM
  • RAM Random Access Memory
  • the memory 1002 may also be called a register, cache, main memory (main storage device), or the like.
  • the memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu-ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like.
  • Storage 1003 may also be called an auxiliary storage device.
  • the storage medium described above may be, for example, a database, server, or other suitable medium including at least one of memory 1002 and storage 1003 .
  • the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of, for example, frequency division duplex (FDD) and time division duplex (TDD). may consist of For example, the transmitting unit 101, the receiving unit 102, the receiving unit 201, the transmitting unit 202, etc. described above may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
  • the output device 1006 is an output device (eg, display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
  • Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
  • the base station 10 and the terminal 20 include hardware such as microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), and FPGAs (Field Programmable Gate Arrays). , and part or all of each functional block may be implemented by the hardware.
  • processor 1001 may be implemented using at least one of these pieces of hardware.
  • notification of information includes physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.
  • RRC signaling may also be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration 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), 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 suitable systems and extended It may be applied to at least one of the next generation systems. Also, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G, etc.).
  • Base station operation Certain operations that are described in this disclosure as being performed by a base station may also be performed by its upper node in some cases.
  • various operations performed for communication with a terminal may be performed by the base station and other network nodes other than the base station (e.g. MME or S-GW, etc. (including but not limited to).
  • MME or S-GW network nodes other than the base station
  • the case where there is one network node other than the base station is exemplified above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).
  • (input/output direction) Information and the like can be output from the upper layer (or lower layer) to the lower layer (or higher layer). It may be input and output via multiple network nodes.
  • 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 appended. The output information and the like may be deleted. The entered information and the like may be transmitted to another device.
  • the determination may be made by a value represented by one bit (0 or 1), by a true/false value (Boolean: true or false), or by numerical comparison (for example, a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.) to website, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • Information, signal Information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
  • the channel and/or symbols may be signaling.
  • a signal may also be a message.
  • a component carrier may also be called a carrier frequency, a cell, a frequency carrier, or the like.
  • system As used in this disclosure, the terms “system” and “network” are used interchangeably.
  • radio resources may be indexed.
  • Base station wireless base station
  • base station radio base station
  • radio base station fixed station
  • NodeB nodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • a base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.
  • a base station can accommodate one or more (eg, three) cells.
  • the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being associated with a base station subsystem (e.g., an indoor small base station (RRH: Communication services can also be provided by Remote Radio Head)).
  • RRH indoor small base station
  • the terms "cell” or “sector” refer to part or all of the coverage area of at least one of the base stations and base station subsystems that serve communication within such coverage.
  • terminal In this disclosure, terms such as “Mobile Station (MS),” “user terminal,” “User Equipment (UE),” “terminal,” etc. may be used interchangeably. .
  • a mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
  • At least one of a base station and a mobile station may be called a transmitter, a receiver, a communication device, and the like. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like.
  • the mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
  • at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
  • 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 as a user terminal.
  • communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.)
  • the terminal 20 may have the functions of the base station 10 described above.
  • words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
  • uplink channels, downlink channels, etc. may be read as side channels.
  • a terminal in the present disclosure may be read as a base station.
  • the base station 10 may have the functions of the terminal 20 described above.
  • determining may encompass a wide variety of actions.
  • “Judgement”, “determining” are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure), ascertaining as “judged” or “determined”, and the like.
  • "judgment” and “determination” are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgment” or “decision” has been made.
  • judgment and “decision” are considered to be “judgment” and “decision” by resolving, selecting, choosing, establishing, comparing, etc. can contain.
  • judgment and “decision” may include considering that some action is “judgment” and “decision”.
  • judgment (decision) may be read as “assuming”, “expecting”, “considering”, or the like.
  • connection means any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being “connected” or “coupled.” Couplings or connections between elements may be physical, logical, or a combination thereof. For example, “connection” may be read as "access”.
  • two elements are defined using at least one of one or more wires, cables, and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and optical (both visible and invisible) regions, and the like.
  • the reference signal may be abbreviated as RS (Reference Signal), or may be referred to as Pilot according to the applicable standard.
  • a radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also consist of one or more slots in the time domain. A subframe may be a fixed time length (eg, 1 ms) independent of numerology.
  • a numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, transmission and reception specific filtering operations performed by the receiver in the frequency domain, specific windowing operations performed by the transceiver in the time domain, and/or the like.
  • SCS subcarrier spacing
  • TTI transmission time interval
  • radio frame configuration for example, transmission and reception specific filtering operations performed by the receiver in the frequency domain, specific windowing operations performed by the transceiver in the time domain, and/or the like.
  • a slot may consist of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain.
  • a slot may be a unit of time based on numerology.
  • a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
  • PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (or PUSCH) mapping type A.
  • PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.
  • Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.
  • one subframe may be called a Transmission Time Interval (TTI)
  • TTI Transmission Time Interval
  • TTI Transmission Time Interval
  • TTI Transmission Time Interval
  • one slot or one minislot may be called a TTI.
  • TTI Transmission Time Interval
  • 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 may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum scheduling time unit in wireless communication.
  • a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis.
  • radio resources frequency bandwidth, transmission power, etc. that can be used by each user terminal
  • a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum scheduling time unit. Also, the number of slots (the 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 called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
  • a TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
  • the short TTI e.g., shortened TTI, etc.
  • a TTI having the above TTI length may be read instead.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
  • the number of subcarriers included in the RB may be the same regardless of the neumerology, eg twelve.
  • the number of subcarriers included in an RB may be determined based on neumerology.
  • the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long.
  • One TTI, one subframe, etc. may each consist of one or more resource blocks.
  • One or more RBs are physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc. may be called.
  • PRBs physical resource blocks
  • SCGs sub-carrier groups
  • REGs resource element groups
  • PRB pairs RB pairs, etc. may be called.
  • a resource block may be composed of one or more resource elements (RE: Resource Element).
  • RE Resource Element
  • 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • a bandwidth part (which may also be called a bandwidth part) represents a subset of contiguous common resource blocks (RBs) for a certain numerology in a certain carrier. good.
  • the common RB may be identified by an RB index based on 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 multiple BWPs may be configured for a UE within one carrier.
  • At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
  • BWP bitmap
  • radio frames, subframes, slots, minislots and symbols described above are only examples.
  • the number of subframes contained in a radio frame the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc.
  • CP cyclic prefix
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean that "A and B are different from C”.
  • Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”
  • notification of predetermined information is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.
  • One aspect of the present disclosure is useful for mobile communication systems.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
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CN202180100964.1A CN117751608A (zh) 2021-07-26 2021-07-26 终端以及无线通信方法
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