WO2022162906A1 - Terminal et procédé de communication sans fil - Google Patents

Terminal et procédé de communication sans fil Download PDF

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Publication number
WO2022162906A1
WO2022162906A1 PCT/JP2021/003366 JP2021003366W WO2022162906A1 WO 2022162906 A1 WO2022162906 A1 WO 2022162906A1 JP 2021003366 W JP2021003366 W JP 2021003366W WO 2022162906 A1 WO2022162906 A1 WO 2022162906A1
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pucch
dmrs
information
control channel
uplink control
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PCT/JP2021/003366
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English (en)
Japanese (ja)
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春陽 越後
祐輝 松村
尚哉 芝池
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株式会社Ｎｔｔドコモ
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Priority to PCT/JP2021/003366 priority Critical patent/WO2022162906A1/fr
Priority to JP2022577979A priority patent/JPWO2022162906A1/ja
Publication of WO2022162906A1 publication Critical patent/WO2022162906A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present disclosure relates to terminals and wireless communication methods that transmit uplink control information.
  • the 3rd Generation Partnership Project (3GPP) has specified the 5th generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG)), and the next generation specification called Beyond 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G
  • a terminal In Release 15 and Release 16 (NR) of 3GPP, a terminal (User Equipment, UE) sends uplink control information (UCI: Uplink Control Information) to a radio base station (gNB) via PUCCH (Physical Uplink Control Channel). It is stipulated to transmit (Non-Patent Document 1).
  • UCI Uplink Control Information
  • gNB Radio base station
  • PUCCH Physical Uplink Control Channel
  • CSI-RS Channel State Information-Reference Signal
  • the following disclosure has been made in view of this situation, and aims to provide a terminal and a wireless communication method capable of transmitting an uplink control channel (PUCCH) sufficiently compatible with increases in UCI and the like.
  • PUCCH uplink control channel
  • One aspect of the present disclosure is a transmission unit (control signal/reference signal processing unit 240) that transmits a demodulation reference signal for an uplink control channel, and a control unit (control unit 270) that controls transmission of the demodulation reference signal. and the control unit is a terminal (UE 200) that sets the demodulation reference signals so as to be orthogonal in at least one of the time domain and the frequency domain.
  • One aspect of the present disclosure includes the steps of transmitting a demodulation reference signal for an uplink control channel, and controlling the transmission of the demodulation reference signal.
  • the radio communication method sets the demodulation reference signals so that they are orthogonal in any one of them.
  • control unit 270 that sets a demodulation reference signal for an uplink control channel
  • a transmission unit that transmits the demodulation reference signal.
  • the control unit is a terminal (UE 200) that configures the orthogonal demodulation reference signals in at least one of the time domain and the frequency domain based on the configuration information of the uplink control channel.
  • control unit 270 that configures the uplink control channel using at least one of precoding information for the uplink control channel and precoding information for the uplink data channel.
  • a transmission unit that transmits the uplink control channel.
  • One aspect of the present disclosure is a receiving unit (control signal/reference signal processing unit 240) that receives configuration information of an uplink control channel, and a plurality of spatial relationships applied to the uplink control channel based on the configuration information.
  • a terminal (UE 200) including a control unit (control unit 270) that sets the .
  • One aspect of the present disclosure is a receiving unit (control signal/reference signal processing unit 240) that receives configuration information for an uplink control channel, and precoding applied to the uplink control channel based on the configuration information, or the A terminal (UE 200) including a control section (control section 270) that sets at least one of the demodulation reference signal ports for the uplink control channel.
  • One aspect of the present disclosure is a receiving unit (control signal/reference signal processing unit 240) that receives downlink control information for a downlink data channel, and an uplink control channel in a specific transmission mode based on the downlink control information.
  • a terminal (UE 200) including a control unit (control unit 270) that sets the .
  • One aspect of the present disclosure includes a step of setting a demodulation reference signal for an uplink control channel, and a step of transmitting the demodulation reference signal, wherein the setting step is based on setting information of the uplink control channel. and setting the demodulation reference signals orthogonal in at least one of the time domain and the frequency domain.
  • FIG. 1 is an overall schematic configuration diagram of a radio communication system 10.
  • FIG. 2 is a diagram showing a configuration example of radio frames, subframes and slots used in the radio communication system 10.
  • FIG. 3 is a functional block configuration diagram of gNB100 and UE200.
  • FIG. 4 is a diagram showing an example of SRS supported by UE.
  • FIG. 5 is a diagram showing an image of precoding and DMRS port designation.
  • FIG. 6 is a diagram showing a schematic operation sequence for MIMO transmission of PUCCH.
  • FIG. 7 is a diagram illustrating an arrangement example (1) of DMRSs according to operation example 1;
  • FIG. 8 is a diagram illustrating an arrangement example (2) of DMRSs according to operation example 1.
  • FIG. FIG. 1 is an overall schematic configuration diagram of a radio communication system 10.
  • FIG. 2 is a diagram showing a configuration example of radio frames, subframes and slots used in the radio communication system 10.
  • FIG. 3 is a functional block configuration diagram of gNB100 and
  • FIG. 9 is a diagram illustrating an arrangement example (3) of DMRSs according to operation example 1;
  • FIG. 10 is a diagram illustrating an example (part 1) of a mapping pattern of FD-OCC according to operation example 1.
  • FIG. 11 is a diagram illustrating an example (part 2) of a mapping pattern of FD-OCC according to operation example 1.
  • FIG. 12 is a diagram illustrating a mapping pattern example (3) of FD-OCC according to operation example 1;
  • FIG. 13 is a diagram illustrating a DMRS allocation example (part 4) according to the operation example 1;
  • FIG. 14 is a diagram illustrating a DMRS allocation example (part 5) according to operation example 1;
  • FIG. 15 is a diagram illustrating an application example of transform precoding to PUCCH DMRS and a configuration example of a PUCCH-Config information element according to operation example 1.
  • FIG. FIG. 16 is a diagram illustrating a DMRS allocation example (No. 6) according to operation example 1;
  • FIG. 17 is a diagram illustrating an arrangement example (No. 7) of DMRSs according to operation example 1;
  • FIG. 18 is a diagram illustrating an arrangement example (8) of DMRSs according to operation example 1;
  • FIG. 19 is a diagram illustrating an arrangement example (part 9) of DMRSs according to operation example 1;
  • FIG. 20 is a diagram illustrating a DMRS arrangement example (No.
  • FIG. 21 is a diagram illustrating a configuration example of a PUCCH-Config information element according to Operation Example 1.
  • FIG. 22 is a diagram illustrating a configuration example (part 1) of a PUCCH-Config information element according to Operation Example 2.
  • FIG. 23 is a diagram illustrating a configuration example (part 2) of a PUCCH-Config information element according to operation example 2.
  • FIG. 24 is a diagram illustrating an application example (Part 1) of the TPMI table/Precoding table according to Operation Example 3.
  • FIG. FIG. 25 is a diagram illustrating an application example (Part 2) of the TPMI table/Precoding table according to Operation Example 3.
  • FIG. 26 is a diagram illustrating a configuration example of a PUCCH-SpatialRelationInfo information element according to Operation Example 4.
  • FIG. FIG. 27 is a diagram illustrating a configuration example (part 1) of MAC-CE according to operation example 5; 28 is a diagram illustrating a configuration example (part 2) of MAC-CE according to operation example 5.
  • FIG. 29 is a diagram illustrating a configuration example (part 1) of MAC-CE according to operation example 6;
  • FIG. 30 is a diagram illustrating a configuration example (part 2) of MAC-CE according to operation example 6;
  • 31 is a diagram illustrating a configuration example of SP CSI reporting on PUCCH Activation/Deactivation MAC-CE according to Operation Example 7.
  • FIG. 32 is a diagram illustrating the relationship among DCI, PDSCH, and PUCCH according to Operation Example 8.
  • FIG. 33 is a diagram illustrating the relationship among DCI, PDSCH, and PUCCH according to Operation Example 9.
  • FIG. 34 is a diagram showing an example of the hardware configuration of gNB100 and UE200.
  • FIG. 1 is an overall schematic configuration diagram of a radio communication system 10 according to the present embodiment.
  • Radio communication system 10 is, for example, a radio communication system according to 5G New Radio (NR), Next Generation-Radio Access Network 20 (hereinafter, NG-RAN 20, and terminal 200 (User Equipment 200, hereinafter, UE 200).
  • NR 5G New Radio
  • NG-RAN 20 Next Generation-Radio Access Network 20
  • UE 200 User Equipment 200
  • the wireless communication system 10 may be a wireless communication system that conforms to a system called Beyond 5G, 5G Evolution, or 6G, and in particular, may support releases after 3GPP Release 18.
  • NG-RAN 20 includes a radio base station 100 (hereinafter gNB 100).
  • gNB 100 radio base station 100
  • the specific configuration of the radio communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG.
  • NG-RAN 20 actually includes multiple NG-RAN Nodes, specifically gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). Note that NG-RAN 20 and 5GC may simply be referred to as a "network”.
  • gNBs or ng-eNBs
  • 5GC 5G-compliant core network
  • the gNB100 is an NR-compliant radio base station and performs NR-compliant radio communication with the UE200.
  • the gNB100 and UE200 use Massive MIMO to generate beams BM with higher directivity by controlling radio signals transmitted from multiple antenna elements, and carrier aggregation (CA) that bundles multiple component carriers (CC). , and dual connectivity (DC) in which communication is performed simultaneously between the UE and each of a plurality of NG-RAN Nodes.
  • Massive MIMO to generate beams BM with higher directivity by controlling radio signals transmitted from multiple antenna elements, and carrier aggregation (CA) that bundles multiple component carriers (CC).
  • CA carrier aggregation
  • DC dual connectivity
  • the wireless communication system 10 may support FR1 and FR2.
  • the frequency bands of each FR are as follows.
  • FR1 410MHz to 7.125GHz
  • FR2 24.25 GHz to 52.6 GHz
  • SCS Sub-Carrier Spacing
  • BW bandwidth
  • FR2 is a higher frequency than FR1, with an SCS of 60 or 120 kHz (240 kHz may be included) and a bandwidth (BW) of 50-400 MHz may be used.
  • the wireless communication system 10 may also support a higher frequency band than the FR2 frequency band. Specifically, the wireless communication system 10 may support frequency bands above 52.6 GHz and up to 114.25 GHz.
  • Cyclic Prefix-Orthogonal Frequency Division Multiplexing CP-OFDM
  • DFT-S-OFDM Discrete Fourier Transform-Spread
  • SCS Sub-Carrier Spacing
  • DFT-S-OFDM may be applied not only to the uplink (UL) but also to the downlink (DL).
  • FIG. 2 shows a configuration example of radio frames, subframes and slots used in the radio communication system 10.
  • one slot consists of 14 symbols (OFDM symbols), and the larger (wider) the SCS, the shorter the symbol period (and slot period). Note that the number of symbols forming one slot does not necessarily have to be 14 symbols (for example, 28 or 56 symbols). Also, the number of slots per subframe may vary depending on the SCS. Additionally, the SCS may be wider than 240kHz (eg, 480kHz, 960kHz, as shown in Figure 2).
  • time direction (t) shown in FIG. 2 may be called the time domain, symbol period, symbol time, or the like.
  • the frequency direction may also be referred to as frequency domain, resource block, subcarrier, BWP (Bandwidth part), and the like.
  • the above-mentioned Massive MIMO is a MIMO (Multiple-Input Multiple-Output) transmission system that spatially multiplexes and transmits radio signals by using multiple antennas for transmission and reception, and uses more antennas. It can be interpreted as a technology that realizes the formation of a sharp radio wave beam that enables radio wave propagation loss compensation when using a high frequency band and the simultaneous transmission of more streams by adopting a super multi-element antenna composed of elements. .
  • MIMO Multiple-Input Multiple-Output
  • MIMO may include single-user MIMO (SU-MIMO) and multi-user MIMO (MU-MIMO).
  • SU-MIMO is a technology that performs MIMO transmission for a single user at the same time and frequency
  • MU-MIMO is interpreted as a technology that uses MIMO to transmit signals for multiple users at the same time and frequency.
  • MIMO may also be called spatial multiplexing in a broad sense, and multiple MIMO layers may be used. Some MIMO layers may be transmitted from a particular site and other MIMO layers may be transmitted from other locations different from the particular site.
  • MIMO transmission (which may be simply called MIMO) is applied to PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel), that is, to communication (data communication) via PDSCH and PUSCH. good. Also, in the radio communication system 10, MIMO transmission may be applied to the PUCCH (Physical Uplink Control Channel).
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • formats may be defined for PUCCH. For example, formats from 0 to 4 (not all) may be specified as specified in 3GPP TS38.211 section 6.3.2.1. OFDM symbol length (number of symbols) and/or number of bits may be set for each format.
  • formats may be defined that differ in either the number of information bits transmitted by the PUCCH or the number of symbols (OFDM symbols) allocated to the PUCCH.
  • PUCCH Format (hereinafter referred to as PF) 1, 3, 4 is called a long format and has 4 to 14 symbols.
  • PF 0, 2 is called a short format and has 1 or 2 symbols.
  • the number of information bits for PF 0,1 is 2 bits or less ( ⁇ 2), and the number of information bits for PF 2-4 is greater than 2 bits (>2).
  • the PUCCH may be called an uplink control channel and may be used to transmit control signals in the uplink (UL).
  • PUCCH may be used to transmit uplink control information (UCI).
  • UCI uplink control information
  • the UCI may include at least one of Hybrid automatic repeat request (HARQ) ACK/NACK, scheduling request (SR) from UE 200, and Channel State Information (CSI).
  • HARQ Hybrid automatic repeat request
  • SR scheduling request
  • CSI Channel State Information
  • FIG. 3 is a functional block configuration diagram of gNB100 and UE200.
  • the UE 200 includes a radio signal transmission/reception unit 210, an amplifier unit 220, a modem unit 230, a control signal/reference signal processing unit 240, an encoding/decoding unit 250, a data transmission/reception unit 260, and a control unit 270. .
  • FIG. 3 shows only main functional blocks related to the description of the embodiment, and that the UE 200 (gNB 100) has other functional blocks (for example, power supply section, etc.). Also, FIG. 3 shows the functional block configuration of the UE 200, and please refer to FIG. 13 for the hardware configuration.
  • the radio signal transmitting/receiving unit 210 transmits/receives radio signals according to NR.
  • the radio signal transmitting/receiving unit 210 controls radio (RF) signals transmitted from multiple antenna elements to generate beams with higher directivity. It can support aggregation (CA), dual connectivity (DC) in which communication is performed simultaneously between the UE and two NG-RAN Nodes, and the like.
  • CA aggregation
  • DC dual connectivity
  • the amplifier section 220 is configured by a PA (Power Amplifier)/LNA (Low Noise Amplifier) and the like. Amplifier section 220 amplifies the signal output from modem section 230 to a predetermined power level. In addition, amplifier section 220 amplifies the RF signal output from radio signal transmission/reception section 210 .
  • PA Power Amplifier
  • LNA Low Noise Amplifier
  • the modulation/demodulation unit 230 executes data modulation/demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (gNB 100, etc.).
  • the modem unit 230 may apply Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM)/Discrete Fourier Transform-Spread (DFT-S-OFDM). Also, DFT-S-OFDM may be used not only for uplink (UL) but also for downlink (DL).
  • the control signal/reference signal processing unit 240 executes processing related to various control signals transmitted and received by the UE 200 and processing related to various reference signals transmitted and received by the UE 200.
  • control signal/reference signal processing unit 240 receives various control signals transmitted from the gNB 100 via a predetermined control channel, for example, radio resource control layer (RRC) control signals. Also, the control signal/reference signal processing unit 240 transmits various control signals to the gNB 100 via a predetermined control channel.
  • RRC radio resource control layer
  • the control signal/reference signal processing unit 240 executes processing using reference signals (RS) such as Demodulation Reference Signal (DMRS) and Phase Tracking Reference Signal (PTRS).
  • RS reference signals
  • DMRS Demodulation Reference Signal
  • PTRS Phase Tracking Reference Signal
  • a DMRS is a known reference signal (pilot signal) between a terminal-specific base station and a terminal for estimating the fading channel used for data demodulation.
  • PTRS is a terminal-specific reference signal for estimating phase noise, which is a problem in high frequency bands.
  • reference signals may include Channel State Information-Reference Signal (CSI-RS), Sounding Reference Signal (SRS), and Positioning Reference Signal (PRS) for position information.
  • CSI-RS Channel State Information-Reference Signal
  • SRS Sounding Reference Signal
  • PRS Positioning Reference Signal
  • control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), RACH (Random Access Channel, Downlink Control Information (DCI) including Random Access Radio Network Temporary Identifier (RA-RNTI)), and Physical Broadcast Channel (PBCH) etc. may be included.
  • PDCCH Physical Downlink Control Channel
  • PUCCH Physical Uplink Control Channel
  • RACH Random Access Channel
  • DCI Downlink Control Information
  • RA-RNTI Random Access Radio Network Temporary Identifier
  • PBCH Physical Broadcast Channel
  • data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel).
  • Data may refer to data transmitted over a data channel.
  • control signal/reference signal processing unit 240 can perform processing related to DMRS (demodulation reference signals), specifically, transmit and/or receive DMRS for specific applications.
  • the control signal/reference signal processing unit 240 can transmit a DMRS (demodulation reference signal) for PUCCH (uplink control channel).
  • the control signal/reference signal processing unit 240 may constitute a transmitting unit.
  • DMRS for PUCCH may be interpreted as DMRS for supporting MIMO transmission on PUCCH.
  • the DMRS may have orthogonality.
  • the DMRSs may be orthogonal in at least one of the time domain and frequency domain.
  • Such DMRS may be referred to as orthogonal DMRS.
  • Orthogonal DMRS may be interpreted as imparting orthogonality by applying (multiplying) an orthogonal cover code (OCC) pattern to PUCCH format DMRS.
  • OCC orthogonal cover code
  • orthogonal DMRS may be interpreted as DMRS that are not co-located in the time or frequency domain.
  • control signal/reference signal processing unit 240 may transmit PUCCH set using at least one of precoding information for PUCCH and precoding information for PUSCH (uplink data channel).
  • Precoding information may be, for example, a Precoding table (Precoding matrix) specified in 3GPP TS38.211 Chapter 6.3.1.4, or a TPMI (Transmitted Precoding Matrix Indicator) specified in 3GPP TS38.212 Chapter 7.3.1.1. ) table (Precoding information and number of layers).
  • the control signal/reference signal processing unit 240 can receive PUCCH setting information.
  • the control signal/reference signal processing unit 240 may constitute a receiving unit.
  • control signal/reference signal processing section 240 uses higher layer (eg, RRC) signaling configuration information, more specifically, RRC information element (IE) PUCCH configuration information (eg, PUCCH -Config information element).
  • RRC higher layer
  • IE RRC information element
  • control signal/reference signal processing unit 240 may receive PUCCH setting information by the control element (CE) of the medium access control layer (MAC).
  • CE control element
  • MAC medium access control layer
  • the configuration information may be related to the configuration of PUCCH, but may include radio resources to which PUCCH is allocated, DMRS port settings for PUCCH, PUCCH format, spatial relation, and the like.
  • control signal/reference signal processing unit 240 may receive DCI (downlink control information) as described above, but may receive DCI for PDSCH (downlink data channel). Specifically, the control signal/reference signal processing unit 240 may receive DCI conforming to the DCI format defined in 3GPP TS38.212 section 7.3 (for example, format 1_0).
  • the encoding/decoding unit 250 performs data segmentation/concatenation, channel coding/decoding, etc. for each predetermined communication destination (gNB 100 or other gNB).
  • the encoding/decoding unit 250 divides the data output from the data transmission/reception unit 260 into pieces of a predetermined size, and performs channel coding on the divided data. Also, encoding/decoding section 250 decodes the data output from modem section 230 and concatenates the decoded data.
  • the data transmission/reception unit 260 executes transmission/reception of Protocol Data Unit (PDU) and Service Data Unit (SDU). Specifically, the data transmitting/receiving unit 260 performs PDU/SDU in multiple layers (medium access control layer (MAC), radio link control layer (RLC), packet data convergence protocol layer (PDCP), etc.). Assemble/disassemble etc. The data transmission/reception unit 260 also performs data error correction and retransmission control based on hybrid ARQ (Hybrid automatic repeat request).
  • hybrid ARQ Hybrid automatic repeat request
  • the control unit 270 controls each functional block that configures the UE200.
  • the control unit 270 can perform control for supporting PUCCH MIMO transmission (which may also be referred to as MIMO transmission).
  • control unit 270 can control signal transmission by the control signal/reference signal processing unit 240, particularly DMRS transmission and setting.
  • Control section 270 can set DMRS for PUCCH.
  • control unit 270 may set the DMRSs to be orthogonal in at least one of the time domain and frequency domain.
  • control unit 270 may set mutually orthogonal DMRSs in either or both of the time domain (eg, slot) and frequency domain (eg, subcarrier).
  • DMRS placement may follow the existing PUCCH format (eg, PF 4) or a new PUCCH format with multiple DMRS ports.
  • the control unit 270 may set orthogonal DMRSs using orthogonal cover code (OCC) patterns.
  • OCC orthogonal cover code
  • the OCC pattern may be TD (Time Domain) -OCC (for orthogonality in the time domain) or FD (Frequency Domain) -OCC (for orthogonality in the frequency domain).
  • the control unit 270 may share the position of the DMRS for PUSCH (uplink data channel) and the position of the DMRS for PUCCH. Specifically, control section 270 may share PUSCH DMRS allocation positions in the time domain and frequency domain as PUCCH DMRS allocation positions. That is, control section 270 may use the position of DMRS allocation for PUSCH as the position of DMRS allocation for PUCCH.
  • the control unit 270 applies transform precoding to information transmitted via PUCCH, specifically, applies transform precoding to UCI (uplink control information). You can stop.
  • the specific transmission mode may be interpreted as MIMO transmission of PUCCH, or more specifically, MIMO transmission of PUCCH according to a specific PUCCH format (eg, PF 3, 4).
  • Transform precoding may also be interpreted as DFT-S-OFDM.
  • control unit 270 may arrange the symbols for the DMRS continuously.
  • a specific DMRS arrangement example will be described later, but control section 270 may arrange DMRS symbols consecutively in the time domain, that is, consecutively to adjacent symbols. At this time, control section 270 may arrange only one symbol for each DMRS port.
  • the control unit 270 can set orthogonal DMRSs in at least either the time domain or the frequency domain based on the PUCCH setting information.
  • the PUCCH configuration information may be RRC information elements or MAC-CE, as described above. That is, control section 270 may configure orthogonal DMRS for PUCCH according to signaling from the network.
  • control unit 270 may set at least one of the precoding applied to the PUCCH and the DMRS port (DMRSport) based on the PUCCH setting information. Specifically, control section 270 may configure PUCCH precoding and/or DMRS ports based on the precoding matrix or TPMI applied during MIMO transmission of PUCCH.
  • control unit 270 may set a plurality of spatial relations to be applied to the PUCCH based on the PUCCH setting information.
  • Spatial relation may be an extension of PUCCH-SpatialRelationInfo specified in 3GPP TS38.331, for example. A specific example of extending Spatial relation will be described later.
  • the control unit 270 may configure PUCCH using at least one of precoding information for PUCCH and precoding information for PUSCH.
  • the precoding information may be a Precoding table (Precoding matrix) or a TPMI table (Precoding information and number of layers). An example of setting PUCCH using the precoding information will be described later.
  • the control unit 270 may configure PUCCH in a specific transmission mode based on DCI (downlink control information) for PDSCH.
  • the specific transmission mode may be interpreted as MIMO transmission of PUCCH, for example.
  • control section 270 may perform PUCCH settings in the case of MIMO transmission according to settings indicated by PDSCH DCI (for example, format 1_0). A specific example of setting PUCCH using DCI for such PDSCH will be described later.
  • UCI is transmitted from the UE 200 to the network (gNB 100) via PUCCH, but the amount of UCI can be increased from the following viewpoints.
  • MIMO transmission may also be applied to PUCCH.
  • MIMO transmission information that needs to be notified to the UE 200 include the following.
  • ⁇ Number of transmission layers ⁇ Specification of UE Precoding (when using Codebook MIMO) - Designation of DMRSport to be used for transmission - Designation of SRS to be used
  • Fig. 4 shows an example of SRS supported by the UE.
  • the number of transmission layers and the SRS may be specified for the UE 200, as shown in FIG. For example, how many layers are used for transmission and the SRS to be used may be specified.
  • DMRS port mapped to each transmission layer may be specified.
  • Fig. 5 shows an image of precoding and DMRS port designation.
  • precoding may be specified to adjust the phase and amplitude of each SRS.
  • SRS2 is designated for TRP1 (Tx/Rx Point) and SRS3 is designated for TRP2.
  • SRS2 may be associated with DMRS port 1 and SRS3 may be associated with DMRS port 2.
  • TRP may mean a network-side antenna array (can be an antenna port or an antenna element), or in a broad sense, a gNB.
  • FIG. 6 shows a schematic operation sequence for MIMO transmission of PUCCH.
  • the UE 200 measures UL channel conditions (step 1). Specifically, the UE 200 measures the number of ranks, channel quality, and the like.
  • the UE 200 may transmit the SRS and transmit the measurement result as a CSI-report.
  • the rank may mean the transmission rank, and the number of ranks may be interpreted as the number of layers (spatial streams) simultaneously transmitted in MIMO.
  • the UE 200 may report capability information (UE capability) regarding PUCCH transmission of the UE 200 to the network.
  • capability information UE capability
  • the network notifies UE 200 of information necessary for PUCCH MIMO transmission (which may be called PUCCHMIMO transmission) (step 2).
  • the network may notify the information through DCI or higher layer (such as RRC) signaling. More specifically, the network may notify the specification of multiple SRSs to be used (in the case of non-codebook type), the specification of TPMI (in the case of codebook type), and the selection of DMRSport.
  • the UE 200 executes PUCCHMIMO transmission based on the notified information (step 3). Specifically, the UE 200 may transmit PUCCH according to a specific format (PF) using multiple layers by MIMO.
  • PF a specific format
  • Operation example 1 DMRS for PUCCH (3.3.1.1)
  • Arrangement of Orthogonal DMRS are arranged to realize PUCCHMIMO transmission.
  • multiple orthogonal DMRSs may be arranged by any of the following methods.
  • the existing PUCCH format (PF) DMRS may be multiplied (applied) with an OCC pattern to give orthogonality.
  • FIG. 7 shows a DMRS arrangement example (part 1) according to operation example 1.
  • FIG. 7 shows an example of DMRS arrangement according to PF 2, 3, 4 (fine shaded areas indicate DMRS positions.
  • DMRS may also be denoted as DM-RS). .
  • DMRS may be orthogonalized in PF 2, 3, 4 used for UCI transmission of 2 bits or more. This can improve frequency utilization efficiency.
  • both UCI and DMRS can be multiplexed with FD-OCC, so the DMRS OCC pattern for MIMO may be configured or scheduled such that the FD-OCC pattern is multiplexed.
  • a new PUCCH format (PF) with multiple DMRSports may be configured.
  • the number of OFDM symbols, the number of Physical Resource Blocks (PRB), the number of Start symbols, etc. may be set.
  • the PUSCH DMRS position may be shared as the PUCCH DMRS.
  • the DMRS of PF 2 may be multiplied by the TD-OCC pattern or FD-OCC pattern to give orthogonality.
  • the orthogonality may be ensured by any one of the following methods or a combination of both.
  • FIG. 8 shows an arrangement example (2) of DMRSs according to operation example 1.
  • the sequence length can be secured, so it is possible to improve the accuracy of DMRS estimation. Orthogonality may be ensured by multiplying each DMRS port with a different FD-OCC pattern (or TD-OCC).
  • FIG. 9 shows a DMRS arrangement example (part 3) according to operation example 1.
  • the DMRS may be arranged in a comb shape.
  • the comb tooth shape may mean a state in which DMRSs are arranged at regular intervals (or irregular intervals) in the frequency direction (or time direction).
  • FIG. 10 shows an FD-OCC mapping pattern example (Part 1) according to Operation Example 1.
  • FIG. This FD-OCC mapping pattern (referred to as Opt.1) is characterized by being resistant to propagation delays and having a high PAPR.
  • FIG. 10 shows an example in which the number of FD-ports is two and the number of DMRSREs is two. As shown in FIG. 10, for example, in the case of FD-OCC pattern example 2, 1, -1 may be repeated.
  • the DMRS mapping pattern and index may be determined according to a predetermined rule, or may be notified by higher layer signaling.
  • FIG. 11 shows a mapping pattern example (part 2) of FD-OCC according to operation example 1.
  • the FD-OCC mapping pattern (Opt.1) is characterized by being resistant to propagation delays and having a high PAPR.
  • FIG. 11 shows an example in which the number of FD-ports is four and the number of DMRSREs is four. As shown in FIG. 11, for example, for FD-OCC pattern example 2, +1, j, -1, +j may be repeated.
  • FIG. 12 shows a mapping pattern example (part 3) of FD-OCC according to operation example 1.
  • FIG. This FD-OCC mapping pattern (referred to as Opt.2) uses Cyclic Shift, is vulnerable to propagation delay, and has low PAPR. Note that FIG. 12 does not show legends for DMRS, UCI, and No data, but it is the same as in FIG. 11 and the like (same below).
  • the mapping between the cyclic index and the orthogonal sequence index that determine the amount of phase rotation may be determined according to a predetermined rule, or may be notified by higher layer signaling. At this time, the cyclic indices may be assigned evenly so that the difference in the amount of phase rotation is increased.
  • FIG. 13 shows a DMRS arrangement example (part 4) according to operation example 1.
  • FIG. FIG. 13 shows an example with two FD-ports (left side) and an example with two TD-ports (right side).
  • the number of TD-ports is 2, it may be usable only when the DMRS ports are not comb-shaped in the frequency direction.
  • the DMRS mapping pattern and index may be determined according to a predetermined rule, or may be notified by higher layer signaling.
  • FIG. 14 shows a DMRS arrangement example (No. 5) according to operation example 1.
  • FIG. FIG. 14 shows an example with 4 FD-ports (left side) and an example with 2 FD-ports and 2 TD-ports (right side).
  • the number of FD-ports may be set to 2, the number of TD-ports to 2, or the number of TD-ports to 4.
  • the orthogonal index mapping method for each layer may be determined according to a predetermined rule, or may be notified by higher layer signaling.
  • each layer may be assigned to each layer in order of index, or the orthogonal index of each layer may be specified by higher layer signaling.
  • DFT-S-OFDM with PUCCH format 3.4 When performing MIMO transmission of PUCCH according to PUCCH format 3.4 (PF 3, 4), PUCCH ( DMRS) may be transmitted.
  • 3GPP Releases 15 and 16 specify that transform precoding is always applied only to UCI data symbols for transmission.
  • FIG. 1 Specify whether to use transform precoding in the upper layer (Opt.2): Layer 2 (eg, MAC) or higher, or when MIMO is set (Layer 1 may also be included) does not apply transform precoding.
  • FIG. 15 whether or not to apply transform precoding (DFT spread) during MIMO transmission of PUCCH may be notified to UE 200 by higher layer signaling.
  • DFT spread transform precoding
  • transformPrecoder field whether or not to apply transform precoding (see transformPrecoder field) may be indicated (the underlined part indicates the relevant part, below same).
  • interference may be prevented by orthogonalizing DMRS with TD-OCC, or by allocating only part of DMRS resources in one port.
  • FIG. 16 shows a DMRS arrangement example (No. 6) according to operation example 1.
  • FIG. 16 in the case of the TD-OCC pattern, the sequence length can be secured, so it is possible to improve the accuracy of DMRS estimation. Orthogonality may be ensured by multiplying each DMRS port with a different TD-OCC pattern.
  • FIG. 17 shows a DMRS arrangement example (No. 7) according to operation example 1.
  • DMRS are arranged in a comb shape.
  • DMRSs may be assigned to multiple consecutive symbols, and DMRSs may be assigned only to one symbol per port.
  • DMRS symbols may be arranged consecutively, and one DMRS symbol may be arranged for each port. In this case, a new DMRS symbol position applicable in normal times may be set.
  • FIG. 18 shows a DMRS arrangement example (No. 8) according to operation example 1.
  • the upper right part of FIG. 18 when there are three DMRS ports, three DMRS symbols are continuous, and one symbol may be assigned to each DMRS port. In this case, UCI data may be mapped to the remaining UCI symbols.
  • the additional DMRS may be arranged on the front side or the rear side based on the DMRS arrangement according to the normal PF 3, 4.
  • the middle right row of FIG. 18 shows an example in which an additional DMRS is placed forward (that is, ahead in time) relative to the DMRS placement according to the normal PF 3, 4. show.
  • the lower right part of FIG. 18 shows an example in which an additional DMRS is placed on the rear side (i.e., at a later position in time) with respect to DMRS placement according to normal PF 3,4.
  • DMRS front side or rear side
  • placement of such additional DMRS may be determined according to a predetermined rule, or may be notified by higher layer signaling.
  • FIG. 19 shows a DMRS arrangement example (part 9) according to operation example 1.
  • Opt.1 applies the FD-OCC mapping pattern (strong to propagation delay and high PAPR). Cyclic shift (weak to propagation delay and low PAPR) is applied in Opt.2.
  • interference can be prevented by making the DMRS orthogonal with FD-OCC or by arranging the DMRS in a comb shape.
  • the FD-OCC pattern example may follow the arrangement example described above (it may also be PF 2).
  • the mapping between OCC pattern and FD-port index may be determined according to a predetermined rule, or may be notified by higher layer signaling.
  • the cyclic shift index may follow the arrangement example described above (it may also be PF 2).
  • the mapping between cyclic shift index and orthogonal sequence index may be determined according to a predetermined rule, or may be notified by higher layer signaling.
  • FIG. 20 shows an arrangement example (10) of DMRSs according to operation example 1.
  • FIG. Specifically, FIG. 20 shows an example (Opt.3) in which DMRSs are arranged in a comb shape. Like Opt.2, Opt.3 is vulnerable to propagation delay and has low PAPR.
  • FIG. 20 shows an example with two FD-ports (left side) and an example with four FD-ports (right side).
  • the DMRS mapping pattern and index may be determined according to a predetermined rule, or may be notified by higher layer signaling.
  • interference can be prevented by making the DMRS orthogonal with FD-OCC or by arranging the DMRS in a comb shape.
  • both UCI and DMRS can be multiplexed by FD-OCC, but the maximum number of FD-OCC pattern or FD-OCC length to be multiplied only by DMRS may be changed according to the number of FD-OCC. Also, in this case, the maximum number of FD-OCC pattern or FD-OCC length may be changed according to the number of PUCCH PRBs.
  • FIG. 21 shows a configuration example of the PUCCH-Config information element according to Operation Example 1. Specifically, the upper side of FIG. 21 shows the PUCCH-Config for PF 3, and the lower side of FIG. 21 shows the PUCCH-Config for PF 4.
  • the PUCCH-Config information element may indicate configuration parameters related to the number of orthogonal DMRSports multiplied (applied) to UCI and DMRS.
  • nrofPRBs the number of PRBs (nrofPRBs) may be indicated.
  • nofTD-ports nofFD-ports
  • FD-OCC TD-OCC
  • a limit may be added to the maximum value of the variable according to nrofPRB, occ-length and occIndex.
  • PUCCH resources may be extended as follows. Specifically, the PUCCH resource corresponding to MIMO transmission may be extended by higher layer signaling, and the extended content may be notified to the UE 200 as MIMO transmission information.
  • one PUCCH resource may contain information elements regarding the next MIMO transmission.
  • OCC pattern of PUCCH DMRS and/or allocation resource setting - DMRS port setting used during MIMO transmission - Precoding matrix setting may be included with respect to setting of OCC pattern/allocated resources during MIMO transmission.
  • - nofTD-ports the number of orthogonal DMRS ports on the frequency axis
  • nofFD-ports the number of orthogonal DMRS ports on the time axis
  • a field related to setting of DMRS ports used during MIMO transmission may be included. In this case, instead of selecting DMRS ports on the frequency axis or on the time axis, for example, one variable may be selected as follows.
  • ⁇ Index (frequency port index) x (total number of time port indexes) + (total number of time port indexes)
  • a field for setting the Precoding matrix may be included.
  • the number of orthogonal DMRS ports on the time axis (or frequency axis) may be calculated from the size of the precoding matrix and the number of orthogonal DMRS ports on the frequency axis (or time axis).
  • the information elements (or fields) involved in the next MIMO transmission may be defined in advance by the 3GPP specifications instead of by higher layer signaling.
  • a unique value may be used according to higher layer signaling or a predetermined rule.
  • the number of PUCCH PRBs and/or the occ-length of PF 4 may be changed according to the frequency band.
  • a setting may be made in which DMRS ports used in predetermined rules or higher layer signaling are determined in order of index.
  • FIG. 23 shows a configuration example (part 2) of the PUCCH-Config information element according to Operation Example 2. As shown in FIG. 23, depending on the number of PRBs, occ-length, and frequency band, a unique number of orthogonal DMRS ports may be signaled (or may be predefined by 3GPP specifications, as described above).
  • the FD-orthogonal-Index and TD-orthogonal-Index are not necessarily required (or may be omitted).
  • TPMI table to be referred to may be selected according to whether or not Maxrank, the number of antenna ports, and transform precoding are used. As described above, the contents of the TPMI table/Precoding table shown in FIG. 24 are defined in 3GPP TS38.211 section 6.3.1.4 and TS38.212 section 7.3.1.1.
  • a precoding matrix may be selected without notifying Maxrank (Opt. 2). In this case, it may operate according to any of the following.
  • ⁇ (Alt.1) Refer to the common TPMI table for all Maxranks.
  • a TPMI table may be created specifically for PUCCH.
  • ⁇ (Alt.2) Specify the index of the Precoding table without going through the TPMI table.
  • a precoding table may be generated exclusively for PUCCH.
  • FIG. 25 shows an application example (Part 2) of the TPMI table/Precoding table according to Operation Example 3. As shown in FIG. 25, the precoding to be used may be specified directly from the Precoding table.
  • the spatial relation may be extended so that multiple reference signals (RS) can be specified using higher layer signaling.
  • RS reference signals
  • the spatial relation may be extended by the following method.
  • ⁇ (Alt.2): Spatial relation group configured by multiple Spatial relations is added to PUCCH-Config Spatial relation info in the set Spatial relation group Set ID and may be selected in the same way as Spatial relation info. Also, a precoding matrix to be used may be set in the spatial relation group by a similar method.
  • FIG. 26 shows a configuration example of the PUCCH-SpatialRelationInfo information element according to Operation Example 4.
  • a plurality of reference signals (which may include synchronization signal blocks (SSB)) may be set in one spatial relation info. In this case, if the number of MIMO layers is 2, only reference signal 1 and reference signal 2 may be used.
  • SSB synchronization signal blocks
  • the precoding matrix for Codebook-type MIMO transmission may be set by spatial relation info (TPMI).
  • TPMI spatial relation info
  • a precoding matrix for each number of MIMO layers may be set.
  • Spatial relation selection by MAC-CE Spatial relation may be selected by MAC-CE.
  • MAC-CE may be used to allow selection of a plurality of spatial relations as follows.
  • ⁇ (Opt.1) Multiple spatial relations can be selected for one PUCCH resource by MAC-CE according to 3GPP Release 15. In this case, multiple selections are possible using reserved bits. MAC-CE may be notified.
  • ⁇ (Opt.2) Define a new MAC-CE, and make it possible to select, for example, up to 64 spatial relations by the method described above. 1).
  • the MAC-CE shown in FIG. 27 may be newly defined. For example, if the reserved bit (R) of MAC-CE according to 3GPP Release 15 is 0, an existing MAC-CE according to 3GPP Release 15 may be selected and one Spatial relation may be selected.
  • MAC-CE may be used to allow multiple spatial relations to be selected (Opt.3).
  • Rel.16 enhanced PUCCH spatial relation it may be possible to select multiple spatial relations for one PUCCH resource.
  • a reserved bit may be used to notify that multiple spatial relations can be assigned to one PUCCH resource ID.
  • FIG. 28 shows a configuration example (part 2) of MAC-CE according to operation example 5. Similar to (1) shown in FIG. 27, when the MAC-CE reserved bit (R) is 0, an existing MAC-CE according to 3GPP Release 15 is selected, and one Spatial relation is selected. good.
  • one PUCCH resource may be able to select multiple spatial relation info IDs.
  • Operation example 6 DMRS port/precoding selection by MAC-CE Further, MAC-CE may be used to select DMRS port and precoding of PUCCH resource.
  • Precoding information information of Precoding matrix applied to MIMO transmission of PUCCH may be notified.
  • the index of TPMI used for MIMO transmission of PUCCH may be notified.
  • multiple DMRS ports used for PUCCH MIMO transmission may be specified.
  • FIG. 29 shows a configuration example (part 1) of MAC-CE according to operation example 6.
  • FIG. 29 shows an example in which the number of DMRS ports is 8 or less.
  • the UE 200 may use the spatial relation in the field of 1 for MIMO transmission.
  • FIG. 30 shows a MAC-CE configuration example (Part 2) according to Operation Example 6.
  • DMRS port index may be specified. For example, when specifying a DMRS port with 8 bits, a maximum of 256 DMRS ports can be specified.
  • Operation example 7 Utilization of Semi-Persistent (SP) CSI reporting Activation MAC-CE
  • SP CSI reporting on PUCCH Activation/Deactivation MAC-CE is used to transmit multiple PUCCH MIMO transmissions.
  • DMRS port may be specified.
  • SP CSI reporting on PUCCH Activation/Deactivation MAC-CE is defined in 3GPP TS38.321 section 6.1.3.16.
  • the UE 200 may perform the following processing.
  • the reserved bit of SP CSI reporting on PUCCH Activation/Deactivation MAC-CE may be used to notify that the MAC-CE is capable of selecting multiple CSI reports and/or precoding matrix information.
  • FIG. 31 shows a configuration example of SP CSI reporting on PUCCH Activation/Deactivation MAC-CE according to operation example 7. If the MAC-CE reserved bit (R) is 0, an existing MAC-CE according to 3GPP Release 15 is selected, and if the MAC-CE reserved bit (R) is 1, multiple CSI reports are selected. MIMO transmission of PUCCH may be enabled. Also, precoding matrix information may be added to Reserve bits.
  • the UE 200 may use multiple PUCCH resource information linked to the CSI report in the 1 field for MIMO transmission.
  • Operation example 8 PDSCH resource allocation information notification using DCI
  • the UE 200 may be notified of information on PUCCH MIMO transmission using DCI for PDSCH resource allocation.
  • the following information related to HARQ feedback PUCCH MIMO may be notified based on DCI that is tied to HARQ feedback and performs PDSCH resource allocation.
  • DCI for PDSCH for example, format 1
  • the DCI to be referenced may be selected according to any of the following.
  • Alt.1 Refer to the DCI of the same (or immediately before/after) slot DCI that allocates PDSCH resource allocation linked to PUCCH (for HARQ feedback)
  • Alt.2 Refer to the DCI of the same (or immediately before/after) slot as the PUCCH to be transmitted (for CSI report/HARQ feedback)
  • Alt.3 Refer to PUSCH in the same (or immediately before/after) slot as PUCCH to be transmitted (for CSI report/HARQ feedback)
  • the information of the slot to be referred to may be specified by higher layer or lower layer signaling (DCI).
  • FIG. 33 shows the relationship among DCI, PDSCH, and PUCCH according to Operation Example 9.
  • DCI may be referred to during MIMO transmission of PUCCH.
  • DCI may notify that the PUSCH information of the same slot is referred to ((1) in the figure).
  • the SRS resource indicator and TPMI of PUSCH in the same slot as PUCCH may be shared during MIMO transmission of PUCCH.
  • the content of the notification may be restricted according to the UCI.
  • the content regarding selection of spatial relation by MAC-CE is also applicable to CSI report and/or HARQ, but such application may be limited.
  • the sharing of PUSCH MIMO information is also applicable to CSI report and/or HARQ, but such application may also be restricted.
  • the utilization of SP CSI reporting Activation MAC-CE is applicable to SP CSI reporting, but such application may be restricted. Such restrictions allow flexible operation, such as preferential processing of notifications by other methods.
  • DMRS port / precoding selection (operation example 6) in MAC-CE can also be applied to HARQ, but since precoding should be changed dynamically, if DCI can be utilized, DCI may be used.
  • Operation example 11 Report of UE capability
  • the UE 200 may report the following contents as UE Capability Information to the network regarding MIMO transmission of PUCCH.
  • the UE 200 may report the corresponding (supported) frequency (FR or band) by any of the following methods.
  • the UE 200 may report the supported duplexing scheme by any of the following methods.
  • the UE 200 can configure DMRSs for PUCCH so that they are orthogonal in at least one of the time domain and frequency domain. Therefore, even if the UCI increases due to the amount of CSI-RS feedback (CSI report) or the like, the PUCCH capacity can be increased by applying MIMO. This allows the UE 200 to adequately handle increases in UCI.
  • the UE 200 can set orthogonal DMRS for PUCCH using the OCC pattern. Thereby, orthogonal DMRS can be set easily and reliably.
  • the UE 200 can share the position of DMRS for PUSCH and the position of DMRS for PUCCH. Therefore, UE 200 can efficiently configure orthogonal DMRS for PUCCH.
  • the UE 200 can stop applying transform precoding (DFT spread) to UCI in a specific transmission mode (during MIMO transmission of PUCCH). Therefore, MIMO transmission of PUCCH can be realized while suppressing the processing load.
  • DFT spread transform precoding
  • orthogonal DMRS symbols for PUCCH may be arranged consecutively using multiple ports. Therefore, highly flexible orthogonal DMRS can be easily set.
  • the UE 200 can configure orthogonal DMRS for PUCCH in at least either the time domain or the frequency domain based on PUCCH configuration information (IE or MAC-CE). Also, the UE 200 may configure at least one of the precoding applied to the PUCCH and the DMRS port (DMRSport), based on the PUCCH configuration information. Further, UE 200 may configure multiple spatial relations applied to PUCCH based on the configuration information. Therefore, the UE 200 can perform appropriate orthogonal DMRS configuration based on the PUCCH configuration information.
  • PUCCH configuration information IE or MAC-CE
  • the UE 200 may configure at least one of the precoding applied to the PUCCH and the DMRS port (DMRSport), based on the PUCCH configuration information. Further, UE 200 may configure multiple spatial relations applied to PUCCH based on the configuration information. Therefore, the UE 200 can perform appropriate orthogonal DMRS configuration based on the PUCCH configuration information.
  • the UE 200 may configure PUCCH using at least one of precoding information for PUCCH and precoding information for PUSCH. Also, UE 200 may configure PUCCH in a specific transmission mode (during MIMO transmission of PUCCH) based on DCI for PDSCH. Therefore, efficient PUCCH setting can be achieved even during MIMO transmission.
  • the time of MIMO transmission of PUCCH has been described as an example, but it does not necessarily have to be the time of MIMO transmission. Specifically, it may be interpreted as a case where a transmission form (state) is applied to increase the PUCCH capacity in order to cope with an increase in UCI. Alternatively, as described above, concurrent transmission of more streams may be interpreted as simultaneous transmission of more streams.
  • DMRS demodulation reference signal
  • each functional block may be implemented using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separate devices (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.
  • FIG. 34 is a diagram showing an example of the hardware configuration of the device.
  • the device may be configured as a computer device including a processor 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, and the like.
  • the term "apparatus” can be read as a circuit, device, unit, or the like.
  • the hardware configuration of the device may be configured to include one or more of each device shown in the figure, or may be configured without some of the devices.
  • Each functional block of the device (see FIG. 3) is realized by any hardware element of the computer device or a combination of the hardware elements.
  • each function of the device is implemented by causing the processor 1001 to perform calculations, controlling communication by the communication device 1004, and controlling the It is realized by controlling at least one of data reading and writing in 1002 and storage 1003 .
  • a processor 1001 operates an operating system and controls the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) including interfaces with peripheral devices, a control unit, an arithmetic unit, registers, and the like.
  • CPU central processing unit
  • 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 various processes described above may be executed by one processor 1001, or may be executed by two or more processors 1001 simultaneously or sequentially.
  • 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 Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Random Access Memory (RAM), etc. may be
  • ROM Read Only Memory
  • EPROM Erasable Programmable ROM
  • EEPROM Electrically 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 programs (program code), software modules, etc. capable of executing a 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 Compact Disc ROM (CD-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 referred to as an auxiliary storage device.
  • the recording 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, duplexer, filter, frequency synthesizer, etc., for realizing at least one of frequency division duplex (FDD) and time division duplex (TDD).
  • FDD frequency division duplex
  • TDD time division duplex
  • 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 device includes hardware such as a microprocessor, digital signal processor (DSP), application specific integrated circuit (ASIC), programmable logic device (PLD), field programmable gate array (FPGA), etc.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA field programmable gate array
  • notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods.
  • the notification of information can be performed through physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), other signals, or combinations thereof
  • RRC signaling may also be referred to as RRC messages, e.g., RRC Connection Setup ) message, RRC Connection Reconfiguration message, or the like.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • Future Radio Access FAA
  • New Radio NR
  • W-CDMA registered trademark
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access 2000
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi (registered trademark)
  • IEEE 802.16 WiMAX®
  • IEEE 802.20 Ultra-WideBand (UWB), Bluetooth®, other suitable systems, and/or next-generation systems enhanced therefrom.
  • a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
  • a specific operation that is performed by a base station in the present disclosure may 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., but not limited to).
  • MME or S-GW network nodes
  • the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).
  • Information, signals can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.
  • Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input and output information may be overwritten, updated, or appended. The output information may be deleted. The entered information may be transmitted to other devices.
  • 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).
  • 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.
  • 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 wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to access websites, 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.
  • 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 and “network” used in this disclosure are used interchangeably.
  • information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information.
  • radio resources may be indexed.
  • base station BS
  • 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 (also called sectors). When a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area corresponding to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head: RRH) can also provide communication services.
  • a base station subsystem e.g., a small indoor base station (Remote Radio)
  • Head: RRH can also provide communication services.
  • cell refers to part or all of the coverage area of at least one of a base station and base station subsystem that provides communication services in this coverage.
  • MS Mobile Station
  • UE User Equipment
  • 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 the base station and 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 a mobile object, the mobile object itself, or the like.
  • the mobile body may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile body (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 mobile station may be an Internet of Things (IoT) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read as a mobile station (user terminal, hereinafter the same).
  • communication between a base station and a mobile station is replaced with communication between multiple mobile stations (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
  • the mobile station may have the functions that the base station has.
  • 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 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 of a fixed length of time (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 structure, 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
  • number of symbols per TTI radio frame structure
  • 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 (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • 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.
  • a PDSCH (or PUSCH) that is transmitted in time units larger than a minislot 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
  • multiple consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, may be a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms may be Note that the unit representing the TTI may be called a slot, minislot, 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
  • the TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, codewords, etc., or may be a processing unit for scheduling, link adaptation, etc. 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 slot or one minislot is called a TTI
  • one or more TTIs may be the minimum scheduling time unit.
  • the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI with 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, etc.
  • TTI that is shorter than a regular TTI may also 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 so on.
  • long TTI for example, normal TTI, subframe, etc.
  • short TTI for example, shortened TTI, etc.
  • a TTI having a TTI length greater than or equal to this value may be read as a replacement.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
  • the number of subcarriers included in an RB may be the same regardless of neurology, and may be 12, for example.
  • 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 (Physical RB: PRB), sub-carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc. may be called.
  • PRB Physical resource blocks
  • SCG sub-carrier groups
  • REG resource element groups
  • PRB pairs RB pairs, etc.
  • a resource block may be composed of one or more resource elements (Resource Element: RE).
  • RE resource elements
  • 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 neumerology in a 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.
  • BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
  • BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
  • One or more BWPs may be configured in one carrier for a UE.
  • 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 included in a radio frame the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc.
  • CP cyclic prefix
  • 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 light (both visible and invisible) regions, and the like.
  • the reference signal can also be abbreviated as Reference Signal (RS), and may also be called Pilot depending on the applicable standard.
  • RS Reference Signal
  • any reference to elements using the "first,” “second,” etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not imply that only two elements may be employed therein or that the first element must precede the second element in any way.
  • determining and “determining” used in this disclosure may encompass a wide variety of actions.
  • “Judgement” and “determination” 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 "judgement” 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” can include considering that some action is “judgment” and “decision”.
  • judgment (decision) may be read as “assuming”, “expecting”, “considering”, or the like.
  • 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.”
  • Radio communication system 20 NG-RAN 100 gNB 200UE 210 radio signal transmission/reception unit 220 amplifier unit 230 modulation/demodulation unit 240 control signal/reference signal processing unit 250 encoding/decoding unit 260 data transmission/reception unit 270 control unit 1001 processor 1002 memory 1003 storage 1004 communication device 1005 input device 1006 output device 1007 bus

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

Abstract

La présente invention concerne un terminal qui comprend un dispositif de commande permettant de régler des signaux de référence de démodulation pour un canal de commande de liaison montante et un émetteur permettant d'émettre les signaux de référence de démodulation. Le dispositif de commande règle des signaux de référence de démodulation qui sont orthogonaux entre eux dans le domaine temporel et/ou le domaine fréquentiel, sur la base d'informations de configuration du canal de commande de liaison montante.
PCT/JP2021/003366 2021-01-29 2021-01-29 Terminal et procédé de communication sans fil WO2022162906A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018512096A (ja) * 2015-01-28 2018-05-10 インターデイジタル パテント ホールディングス インコーポレイテッド 多数のキャリアを用いて動作するためのアップリンクフィードバック方法
WO2019030894A1 (fr) * 2017-08-10 2019-02-14 三菱電機株式会社 Dispositif de transmission
WO2019171518A1 (fr) * 2018-03-07 2019-09-12 株式会社Ｎｔｔドコモ Terminal utilisateur et procédé de communication sans fil
WO2019239600A1 (fr) * 2018-06-15 2019-12-19 株式会社Ｎｔｔドコモ Terminal utilisateur et procédé de communication sans fil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018512096A (ja) * 2015-01-28 2018-05-10 インターデイジタル パテント ホールディングス インコーポレイテッド 多数のキャリアを用いて動作するためのアップリンクフィードバック方法
WO2019030894A1 (fr) * 2017-08-10 2019-02-14 三菱電機株式会社 Dispositif de transmission
WO2019171518A1 (fr) * 2018-03-07 2019-09-12 株式会社Ｎｔｔドコモ Terminal utilisateur et procédé de communication sans fil
WO2019239600A1 (fr) * 2018-06-15 2019-12-19 株式会社Ｎｔｔドコモ Terminal utilisateur et procédé de communication sans fil

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