WO2022149270A1 - Terminal, station de base et procédé de communication radio - Google Patents

Terminal, station de base et procédé de communication radio Download PDF

Info

Publication number
WO2022149270A1
WO2022149270A1 PCT/JP2021/000529 JP2021000529W WO2022149270A1 WO 2022149270 A1 WO2022149270 A1 WO 2022149270A1 JP 2021000529 W JP2021000529 W JP 2021000529W WO 2022149270 A1 WO2022149270 A1 WO 2022149270A1
Authority
WO
WIPO (PCT)
Prior art keywords
pdcch
dci
information
control information
channel
Prior art date
Application number
PCT/JP2021/000529
Other languages
English (en)
Japanese (ja)
Inventor
春陽 越後
大輔 栗田
浩樹 原田
Original Assignee
株式会社Ｎｔｔドコモ
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 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to PCT/JP2021/000529 priority Critical patent/WO2022149270A1/fr
Publication of WO2022149270A1 publication Critical patent/WO2022149270A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present disclosure relates to terminals, base stations and wireless communication methods that execute wireless communication, in particular, terminals, base stations and wireless communication methods that execute message communication in a random access channel procedure.
  • the 3rd Generation Partnership Project (3GPP) specifies the 5th generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG)), and next-generation specifications called Beyond 5G, 5G Evolution or 6G. We are also proceeding with the conversion.
  • 5G New Radio
  • NG Next Generation
  • FR1 410MHz-7.125GHz
  • FR2 24.25GHz-52.6GHz
  • Non-Patent Document 1 coverage enhancement is the subject of FR1 and FR2 (Non-Patent Document 1). Along with this, it is desirable to improve the channel quality such as PUSCH (Physical Uplink Shared Channel), PUSCH (Physical Uplink Shared Channel), PDCCH (Physical Downlink Control Channel), and PUCCH (Physical Uplink Control Channel).
  • PUSCH Physical Uplink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • PDCCH Physical Downlink Control Channel
  • PUCCH Physical Uplink Control Channel
  • CSI-RS Channel State Indicator-Reference Signal
  • RACH Random Access Channel
  • SSB Synchronization Signal Block
  • the following disclosure was made in view of such a situation, and the purpose is to provide a terminal that can improve the channel quality.
  • the present disclosure is a terminal that receives control information via a physical downlink control channel in a random access channel procedure and receives a message via a physical downlink shared channel based on the control information.
  • the gist is that the receiving unit repeatedly receives the control information.
  • the present disclosure is a transmission unit which is a base station and transmits control information via a physical downlink control channel in a random access channel procedure, and transmits a message via a physical downlink shared channel based on the control information.
  • the gist is that the transmission unit repeatedly transmits the control information.
  • the present disclosure is a wireless communication method, in which, in a random access channel procedure, step A in which control information is received via a physical downlink control channel and a message are transmitted via a physical downlink shared channel based on the control information.
  • the gist includes a step B for receiving, and the step A includes a step of repeatedly receiving the control information.
  • FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10.
  • FIG. 2 is a diagram showing a frequency range used in the wireless communication system 10.
  • FIG. 3 is a diagram showing a configuration example of a wireless frame, a subframe, and a slot used in the wireless communication system 10.
  • FIG. 4 is a functional block configuration diagram of the UE 200.
  • FIG. 5 is a functional block configuration diagram of gNB100.
  • FIG. 6 is a diagram for explaining the RACH procedure.
  • FIG. 7 is a diagram for explaining the RACH procedure.
  • FIG. 8 is a diagram for explaining the repeated transmission according to the modification example 1.
  • FIG. 9 is a diagram for explaining the repeated transmission according to the second modification.
  • FIG. 10 is a diagram for explaining repeated transmission according to the second modification.
  • FIG. 10 is a diagram for explaining repeated transmission according to the second modification.
  • FIG. 11 is a diagram for explaining repeated transmission according to the second modification.
  • FIG. 12 is a diagram for explaining the repeated transmission according to the second modification.
  • FIG. 13 is a diagram for explaining the repeated transmission according to the modification example 3.
  • FIG. 14 is a diagram for explaining the repeated transmission according to the modification example 3.
  • FIG. 15 is a diagram for explaining the repeated transmission according to the modification example 3.
  • FIG. 16 is a diagram showing an example of the hardware configuration of the UE 200.
  • FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10 according to the embodiment.
  • the wireless communication system 10 is a wireless communication system according to 5G New Radio (NR), and includes a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN20, and a terminal 200 (hereinafter, UE200)).
  • NR 5G New Radio
  • NG-RAN20 Next Generation-Radio Access Network
  • UE200 terminal 200
  • the wireless communication system 10 may be a wireless communication system according to a method called Beyond 5G, 5G Evolution or 6G.
  • NG-RAN20 includes a radio base station 100A (hereinafter, gNB100A) and a radio base station 100B (hereinafter, gNB100B).
  • gNB100A radio base station 100A
  • gNB100B radio base station 100B
  • the specific configuration of the wireless communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG.
  • NG-RAN20 actually includes multiple NG-RANNodes, specifically gNB (or ng-eNB), and is connected to a core network (5GC, not shown) according to 5G.
  • NG-RAN20 and 5GC may be simply expressed as "network”.
  • GNB100A and gNB100B are radio base stations according to 5G, and execute wireless communication according to UE200 and 5G.
  • gNB100A, gNB100B and UE200 are Massive MIMO (Multiple-Input Multiple-Output) and multiple component carriers (CC) that generate beam BM with higher directivity by controlling radio signals transmitted from multiple antenna elements.
  • Massive MIMO Multiple-Input Multiple-Output
  • CC multiple component carriers
  • CA carrier aggregation
  • DC dual connectivity
  • the wireless communication system 10 supports a plurality of frequency ranges (FR).
  • FIG. 2 shows the frequency range used in the wireless communication system 10.
  • the wireless communication system 10 corresponds to FR1 and FR2.
  • the frequency bands of each FR are as follows.
  • FR1 410 MHz to 7.125 GHz
  • FR2 24.25 GHz to 52.6 GHz
  • SCS Sub-Carrier Spacing
  • BW bandwidth
  • FR2 has a higher frequency than FR1, and SCS of 60, or 120 kHz (240 kHz may be included) is used, and a bandwidth (BW) of 50 to 400 MHz may be used.
  • SCS may be interpreted as numerology. Numerology is defined in 3GPP TS38.300 and corresponds to one subcarrier interval in the frequency domain.
  • the wireless communication system 10 also supports a higher frequency band than the FR2 frequency band. Specifically, the wireless communication system 10 corresponds to a frequency band exceeding 52.6 GHz and up to 114.25 GHz. Such a high frequency band may be referred to as "FR2x" for convenience.
  • Cyclic Prefix-Orthogonal Frequency Division Multiplexing CP-OFDM
  • DFT- Discrete Fourier Transform-Spread
  • SCS Sub-Carrier Spacing
  • FIG. 3 shows a configuration example of a wireless frame, a subframe, and a slot used in the wireless communication system 10.
  • one slot is composed of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period).
  • the SCS is not limited to the interval (frequency) shown in FIG. For example, 480 kHz, 960 kHz, etc. may be used.
  • the number of symbols constituting one slot does not necessarily have to be 14 symbols (for example, 28, 56 symbols).
  • the number of slots per subframe may vary from SCS to SCS.
  • the time direction (t) shown in FIG. 3 may be referred to as a time domain, a symbol period, a symbol time, or the like.
  • the frequency direction may be referred to as a frequency domain, a resource block, a subcarrier, a bandwidth part (BWP: Bandwidth part), or the like.
  • DMRS is a kind of reference signal and is prepared for various channels.
  • it may mean a downlink data channel, specifically, a DMRS for PDSCH (Physical Downlink Shared Channel).
  • the upstream data channel specifically, the DMRS for PUSCH (Physical Uplink Shared Channel) may be interpreted in the same manner as the DMRS for PDSCH.
  • DMRS can be used for channel estimation in UE200 as part of a device, eg, coherent demodulation.
  • DMRS may only be present in the resource block (RB) used for PDSCH transmission.
  • DMRS may have multiple mapping types. Specifically, DMRS has mapping type A and mapping type B. In mapping type A, the first DMRS is placed in the second or third symbol of the slot. With mapping type A, DMRS may be mapped relative to the slot boundaries, regardless of where the actual data transmission begins in the slot. The reason why the first DMRS is placed in the second or third symbol of the slot may be interpreted as placing the first DMRS after the control resource sets (CORESET).
  • CORESET control resource sets
  • mapping type B the first DMRS may be placed in the first symbol of the data allocation. That is, the DMRS position may be given relative to where the data is located, rather than relative to the slot boundaries.
  • DMRS may have multiple types. Specifically, DMRS has Type 1 and Type 2. Type 1 and Type 2 differ in the maximum number of mapping and orthogonal reference signals in the frequency domain. Type 1 can output up to 4 orthogonal signals with a single-symbol DMRS, and Type 2 can output up to 8 orthogonal signals with a double-symbol DMRS.
  • FIG. 4 is a functional block configuration diagram of UE200.
  • the UE 200 includes a radio signal transmission / reception unit 210, an amplifier unit 220, a modulation / demodulation unit 230, a control signal / reference signal processing unit 240, a coding / decoding unit 250, a data transmission / reception unit 260, and a control unit 270. ..
  • the radio signal transmission / reception unit 210 transmits / receives a radio signal according to NR.
  • the wireless signal transmission / reception unit 210 corresponds to Massive MIMO, a CA that bundles a plurality of CCs, and a DC that simultaneously communicates between a UE and each of two NG-RAN Nodes.
  • the amplifier unit 220 is composed of PA (Power Amplifier) / LNA (Low Noise Amplifier) and the like.
  • the amplifier unit 220 amplifies the signal output from the modulation / demodulation unit 230 to a predetermined power level. Further, the amplifier unit 220 amplifies the RF signal output from the radio signal transmission / reception unit 210.
  • the modulation / demodulation unit 230 executes data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (gNB100 or other gNB).
  • Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform-Spread (DFT-S-OFDM) may be applied to the modulation / demodulation unit 230. Further, the DFT-S-OFDM may be used not only for the uplink (UL) but also for the downlink (DL).
  • the control signal / reference signal processing unit 240 executes processing related to various control signals transmitted / received by the UE 200 and processing related to various reference signals transmitted / 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, control signals of the radio resource control layer (RRC). Further, the control signal / reference signal processing unit 240 transmits various control signals to the gNB 100 via a predetermined control channel.
  • a predetermined control channel for example, control signals of the radio resource control layer (RRC).
  • RRC radio resource control layer
  • the control signal / reference signal processing unit 240 executes processing using a reference signal (RS) such as Demodulation Reference Signal (DMRS) and Phase Tracking Reference Signal (PTRS).
  • RS reference signal
  • DMRS Demodulation Reference Signal
  • PTRS Phase Tracking Reference Signal
  • DMRS is a reference signal (pilot signal) known between the base station and the terminal of each terminal for estimating the fading channel used for data demodulation.
  • the PTRS is a terminal-specific reference signal for the purpose of estimating phase noise, which is a problem in high frequency bands.
  • the reference signal may include ChannelStateInformation-ReferenceSignal (CSI-RS), SoundingReferenceSignal (SRS), and PositioningReferenceSignal (PRS) for location information.
  • CSI-RS ChannelStateInformation-ReferenceSignal
  • SRS SoundingReferenceSignal
  • PRS PositioningReferenceSignal
  • control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), RACH (Random Access Channel), Random Access Radio Network Temporary Identifier (RA-RNTI), Downlink Control Information (DCI), and Physical Broadcast Channel (PBCH) etc. are included.
  • PDCCH Physical Downlink Control Channel
  • PUCCH Physical Uplink Control Channel
  • RACH Random Access Channel
  • RA-RNTI Random Access Radio Network Temporary Identifier
  • DCI Downlink Control Information
  • PBCH Physical Broadcast Channel
  • the data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel).
  • Data means data transmitted over a data channel.
  • the data channel may be read as a shared channel.
  • control signal / reference signal processing unit 240 constitutes a receiving unit that receives downlink control information (DCI).
  • DCI has existing fields such as DCI Formats, Carrier indicator (CI), BWP indicator, FDRA (Frequency Domain Resource Allocation), TDRA (Time Domain Resource Allocation), MCS (Modulation and Coding Scheme), HPN (HARQ Process Number). , NDI (NewDataIndicator), RV (RedundancyVersion), etc. are included.
  • the value stored in the DCI Format field is an information element that specifies the DCI format.
  • the value stored in the CI field is an information element that specifies the CC to which DCI applies.
  • the value stored in the BWP indicator field is an information element that specifies the BWP to which DCI applies.
  • the BWP that can be specified by the BWP indicator is set by the information element (BandwidthPart-Config) included in the RRC message.
  • the value stored in the FDRA field is an information element that specifies the frequency domain resource to which DCI applies.
  • the frequency domain resource is specified by the value stored in the FDRA field and the information element (RAType) contained in the RRC message.
  • the value stored in the TDRA field is an information element that specifies the time domain resource to which DCI applies.
  • the time domain resource is specified by the value stored in the TDRA field and the information elements (pdsch-TimeDomainAllocationList, push-TimeDomainAllocationList) contained in the RRC message.
  • Time domain resources may be identified by the values stored in the TDRA fields and the default table.
  • the value stored in the MCS field is an information element that specifies the MCS to which DCI applies.
  • MCS is specified by the values stored in MCS and the MCS table.
  • the MCS table may be specified by RRC messages or specified by RNTI scrambling.
  • the value stored in the HPN field is an information element that specifies the HARQ Process to which DCI is applied.
  • the value stored in the NDI is an information element for specifying whether or not the data to which DCI is applied is the initial data.
  • the value stored in the RV field is an information element that specifies the redundancy of the data to which DCI is applied.
  • the control signal / reference signal processing unit 240 transmits a random access preamble as a first message (hereinafter, Msg1) in a random access procedure (hereinafter, RACH (RandomAccessChannel) procedure).
  • the control signal / reference signal processing unit 240 receives a second message (hereinafter, Msg2) as a response message to Msg1 in the RACH procedure.
  • Msg2 the control signal / reference signal processing unit 240 transmits a third message (hereinafter, Msg3) via PUSCH in the RACH procedure.
  • Msg3 a third message
  • the control signal / reference signal processing unit 240 receives the fourth message (hereinafter, Msg4) as a response message to Msg3 in the RACH procedure (3GPP TS38.321 V16.2.1 ⁇ 5.1 “Random Access procedure”).
  • Msg1 may be transmitted via PRACH (Physical Random Access Channel).
  • Msg1 may be referred to as PRACH Preamble.
  • Msg2 may be transmitted via PDSCH.
  • Msg2 may be referred to as RAR (RandomAccessResponse).
  • Msg3 may be referred to as RRC Connection Request.
  • Msg4 may be referred to as RRC Connection Setup.
  • control signal / reference signal processing unit 240 constitutes a receiving unit that receives DCI via PDCCH and receives a message via PDSCH based on DCI in the RACH procedure.
  • the message received via PDSCH may be at least one of Msg2 and Msg4.
  • the control signal / reference signal processing unit 240 repeatedly receives DCI (PDCCH) that specifies PDSCH resources.
  • the coding / decoding unit 250 executes data division / concatenation and channel coding / decoding for each predetermined communication destination (gNB100 or other gNB).
  • the coding / decoding unit 250 divides the data output from the data transmission / reception unit 260 into predetermined sizes, and executes channel coding for the divided data. Further, the coding / decoding unit 250 decodes the data output from the modulation / demodulation unit 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).
  • the data transmitter / receiver 260 is a PDU / SDU in a plurality of layers (such as a medium access control layer (MAC), a radio link control layer (RLC), and a packet data convergence protocol layer (PDCP)). Assemble / disassemble the.
  • the data transmission / reception unit 260 executes data error correction and retransmission control based on the hybrid ARQ (Hybrid automatic repeat request).
  • the control unit 270 controls each functional block constituting the UE 200.
  • the control unit 270 controls the RACH procedure described above.
  • FIG. 5 is a functional block configuration diagram of gNB100. As shown in FIG. 5, the gNB 100 has a receiving unit 110, a transmitting unit 120, and a control unit 130.
  • the receiving unit 110 receives various signals from the UE 200.
  • the receiving unit 110 may receive the UL signal via PUCCH or PUSCH.
  • the transmission unit 120 transmits various signals to the UE 200.
  • the transmission unit 120 may transmit a DL signal via PDCCH or PDSCH.
  • the transmission unit 120 constitutes a transmission unit that transmits DCI via PDCCH and transmits a message via PDSCH based on DCI in the RACH procedure.
  • the transmission unit 120 repeatedly transmits DCI (PDCCH) that specifies PDSCH resources.
  • the control unit 130 controls the gNB 100.
  • the control unit 130 constitutes a control unit that controls the transmission of the second control information based on the first control information and controls the communication of data based on the second control information.
  • the DCI may be a DCI that specifies the PDSCH resource used in Msg2, or may be a DCI that specifies the PDSCH resource used in Msg4.
  • UE200 transmits Msg1 to NG RAN20 (for example, gNB100).
  • the UE200 repeatedly receives DCI (PDCCH) that specifies the resources of Msg2 (PDSCH).
  • NG RAN20 performs repeated transmissions of DCI (PDCCH) that specify the resources of Msg2 (PDSCH).
  • PDCCH DCI
  • PDSCH DCI
  • repeated reception / transmission of DCI is performed in the RAR window.
  • UE200 receives Msg2 corresponding to Msg1 from NG RAN 20 based on DCI.
  • NG RAN20 sends Msg2 corresponding to Msg1 to UE200 based on DCI.
  • UE200 sends Msg3 corresponding to Msg2 to NG RAN 20.
  • the UE200 receives DCI (PDCCH) that specifies the resources of Msg4 (PDSCH).
  • UE200 receives Msg4 for Msg3 from NG RAN 20 based on DCI.
  • UE200 sends an acknowledgment (HARQ-ACK) to Msg4 to NG RAN 20.
  • DCI DCI
  • HARQ-ACK acknowledgment
  • UE200 transmits Msg1 to NG RAN20 (for example, gNB100).
  • UE200 receives DCI (PDCCH) which specifies the resource of Msg2 (PDSCH).
  • UE200 receives Msg2 for Msg1 from NG RAN 20 based on DCI.
  • UE200 sends Msg3 corresponding to Msg2 to NG RAN 20.
  • the UE200 repeatedly receives DCI (PDCCH) that specifies the resources of Msg4 (PDSCH).
  • NG RAN20 performs repeated transmissions of DCI (PDCCH) that specify the resources of Msg4 (PDSCH).
  • UE200 receives Msg4 corresponding to Msg3 from NG RAN 20 based on DCI.
  • NG RAN20 sends Msg4 corresponding to Msg3 to UE200 based on DCI.
  • UE200 sends an acknowledgment (HARQ-ACK) to Msg4 to NG RAN 20.
  • HARQ-ACK acknowledgment
  • the repetitive reception / transmission may include a first type repetitive reception / transmission (inter-slot repetition) in which the PDCCH is monitored between slots.
  • the first type may be referred to as Repetition type A.
  • the repetitive reception / transmission may include a second type of repetitive reception / transmission (intra-slot repetition) in which the PDCCH is monitored in the slot.
  • the second type may be referred to as Repetition type B. Details of Repetition type A and Repetition type B will be described later.
  • the UE 200 repeatedly receives DCI (PDCCH) that specifies a resource for PDSCH (Msg2 or Msg4).
  • PDCH DCI
  • gNB100 performs repeated transmissions of DCI (PDCCH) that specify the resources of PDSCH (Msg2 or Msg4).
  • the coverage of PDCCH can be improved by improving the channel quality of PDCCH.
  • case 1 the case where the NG RAN 20 determines whether or not the UE 200 supports repeated reception
  • case 2 the case where the NG RAN 20 does not determine whether or not the UE 200 supports the repeated reception
  • case 2 a UE 200 that supports repeated reception
  • a UE 200 that does not support repeated reception may be referred to as a Legacy UE.
  • Case 1 the UE 200 (control signal / reference signal processing unit 240) transmits a specific random access preamble corresponding to repeated reception as Msg1 in the RACH procedure.
  • a specific random access preamble may be distinguished from other random access preambles by the RA preamble index.
  • the specific random access preamble may be distinguished from other random access preambles by the opportunity to transmit Msg1 (hereinafter, RO (RACH Occasion)).
  • the specific random access preamble may be distinguished from other random access preambles by the OCC (Orthogonal Coverage Code) pattern used in Msg1.
  • a specific random access preamble may be distinguished from other random access preambles by two or more parameters selected from the Preamble index, RO and OCC.
  • the specific random access preamble may be considered to be the preamble used by the Enhanced UE, and the other random access preambles may be considered to be the preamble used by the Legacy UE.
  • the UE Capability may include an information element indicating whether or not the UE 200 supports repeated reception.
  • CORESET used for repeated reception may be additionally assigned.
  • the additional CORESET may be notified to the UE 200 by broadcast information such as SIB.
  • the Enhanced UE decodes the DCI (PDCCH) corresponding to the additional CORESET, but the Legacy UE does not have to decode the DCI (PDCCH) corresponding to the additional CORESET.
  • Enhanced UE has PDCCH # 1 of CCE # 0 and PDCCH # 2 of CCE # 1, as well as PDCCH # 1 of CCE # 1, PDCCH # 2 of CCE # 2, PDCCH # 1 of CCE # 2 and Execute the decryption (Blind decode) of PDCCH # 2 of CCE # 3.
  • candidates for PDCCH resources used for repeated reception may be newly assigned.
  • Candidates for resources for Enhanced UE may be notified to UE200 by notification information such as SIB.
  • gNB100 transmits the PDCCH for Legacy UE and the PDCCH for Enhanced UE in the RAR window (or Contention resolution timer).
  • PDCCH for Enhanced UE is transmitted using resource candidates of two or more PDCCH.
  • Repetition type A is a procedure for repeatedly receiving DCI by monitoring PDCCH for each slot.
  • Repetition type A there is no need to change the CORESET to be monitored, and the number of CCEs to be decoded (Blind decode) does not change. Therefore, it is possible to suppress an increase in the power consumption of the UE 200.
  • DCI The information elements included in the DCI transmitted via each PDCCH will be described below.
  • an information element for example, TDRA
  • the information elements contained in each DCI may be the same, except for the information elements that specify the PDSCH time-wise resources.
  • Option 1 may define a PDCCH (hereinafter referred to as a reference PDCCH) used as a reference for specifying a resource in the time direction of PDSCH (Msg2 or Msg4).
  • a reference PDCCH may be the first received PDCCH or the last received PDCCH.
  • the reference PDCCH may be predetermined or may be specified by broadcast information such as SIB. In such cases, each DCI contains the same information elements as those contained in the reference DCI.
  • each DCI may be transmitted in a way that can identify the relative difference in time between PDCCH and PDSCH. Relative differences may be implicitly notified to UE200 by the DMRS pattern and CCE index of PDCCH.
  • each DCI (PDCCH) specifies the PDSCH time-direction resource according to the reception timing of each DCI so that the same PDSCH (Msg2 or Msg4) time-direction resource is specified. Contains information elements to do.
  • the options shown below may be adopted as a method for the UE 200 to decode each DCI.
  • the UE 200 may decode the same information element in each DCI (for example, soft combine), and then individually decode different information elements in each DCI.
  • the UE 200 individually decodes the same information element (which may be referred to as a shared part) in each DCI, and individually decodes a different information element (which may be referred to as an exclusive part) in each DCI. It may be decrypted.
  • each of the shared portion of each DCI and the proprietary portion of each DCI may be encoded.
  • the shared portion of each DCI may be encoded, and then the proprietary portion of each unencoded DCI and the shared portion of each encoded DCI may be encoded together.
  • the number of repetitions is predetermined by the wireless communication system 10.
  • the number of repetitions may be determined according to the frequency band, SCS, division method (TDD or FDD), frequency range (FR1, FR2, etc.).
  • all PDCCH in CORESET may be used for repeated reception / transmission.
  • the gNB100 may repeatedly transmit DCI (PDCCH) to the Enhanced UE or the UE after a specific release over a predetermined number of repetitions.
  • the specific release may include a release (RRC connection release) accompanied by a factor requiring improvement of the channel quality of PDCCH.
  • the broadcast information such as SIB may include an information element indicating the number of repetitions.
  • the information element indicating the number of repetitions may be included in RACH-ConfigCommon information, PDCCH-ConfigCommon information, SearchSpace information, and the like.
  • the information element indicating the number of repetitions may separately include an information element indicating the number of repetitions of PDCCH regarding Msg2 and an information element indicating the number of repetitions of PDCCH regarding Msg4.
  • the information element indicating the number of repetitions may include an information element indicating the number of repetitions of PDCCH common to both Msg2 and Msg4.
  • the number of repetitions of PDCCH regarding Msg4 may be notified by the information element contained in Msg3 transmitted from UE200, or may be notified by the information element contained in Msg2 (RAR) transmitted from gNB100.
  • the number of repetitions of PDCCH regarding Msg2 may be the same as the number of repetitions of Msg2.
  • the number of repetitions of PDCCH with respect to Msg4 may be the same as the number of repetitions of Msg4.
  • the UE 200 may notify the NG RAN 20 of the number of repetitions by the RA preamble index.
  • the UE 200 may notify the NG RAN 20 of the number of repetitions by the RO.
  • the UE 200 may notify the NG RAN 20 of the number of repetitions by the RO.
  • the OCC Orthogonal Coverage Code
  • the UE200 may notify the NG RAN20 of the number of repetitions by the OCC pattern.
  • the UE 200 may notify the NG RAN 20 of the number of repetitions by the Initial Bandwidth.
  • gNB100 is implicitly determined by the information element contained in Msg2 under the premise that it is associated with the information element (TDRA table index, MCS index, TA value) contained in Msg2. May be notified.
  • the number of repetitions of PDCCH regarding Msg4 is associated with the TRP (Transmission Reception Point) of Msg2 (RAR) transmitted from gNB100, and may be implicitly notified by the TRP of Msg2 (RAR).
  • the number of repetitions of PDCCH for Msg4 may be the same as the number of repetitions of PDCCH for Msg2.
  • repeated reception / transmission of PDCCH may be executed at that number of repetitions.
  • repeated reception / transmission of PDCCH may be executed with the number of repetitions implicitly notified from either UE200 or gNB100.
  • the number of repetitions may be associated with the CCE (CCE index) used for PDCCH transmission. That is, the gNB100 may notify the UE100 of the number of repetitions of the PDCCH by the CCE (CCE index) used for the transmission of the PDCCH. For example, as shown in FIG. 10, when PDCCH is transmitted using CCE # 0, the number of repetitions is 2, and when PDCCH is transmitted using CCE # 1 and CCE # 2, it is repeated. The number of times may be four, and there may be no repeated reception / transmission of PDCCH using CCE # 3.
  • the correspondence between the number of repetitions and the CCE may be predetermined in the wireless communication system 10.
  • the correspondence between the number of repetitions and CCE may be explicitly notified to UE200 from NG RAN20.
  • the broadcast information such as SIB may include an information element indicating the correspondence.
  • the information element indicating the correspondence may be included in RACH-ConfigCommon information, PDCCH-ConfigCommon information, SearchSpace information, and the like.
  • the information element indicating the association may be the number of times for each CCE index (for example, ⁇ 2, 2, 4, 1 ⁇ in the case shown in FIG. 10).
  • the information element indicating the association may be referred to as msg2-pdcch-AggregationFactorperPDCCHcandidate or msg4-pdcch-AggregationFactorperPDCCHcandidate. Further, the information element indicating the correspondence may be determined according to the frequency band, SCS, division method (TDD or FDD), and frequency range (FR1, FR2, etc.).
  • PDCCH may be transmitted using the same CCE in all slots.
  • PDCCH frequency hopping does not have to be performed.
  • DMRS can be used effectively.
  • the PDCCH may be transmitted using a different CCE for each slot.
  • frequency hopping of PDCCH may be performed. In such cases, the frequency diversity effect can be obtained.
  • frequency hopping may be a process of arranging PDCCH at a position different by an offset for each slot. For example, for the PDCCH resource of each slot, select the PRB to place the PDCCH according to the following formula described in ⁇ 10.1 “UE procedure for determining physical downlink control channel assignment” of TS38.213 V16.3.0. It may be specified by.
  • the hopping pattern may be determined by the following options.
  • the hopping pattern is predetermined in the wireless communication system 10 as well as the number of repetitions.
  • the hopping pattern may be determined according to the frequency band, SCS, division method (TDD or FDD), frequency range (FR1, FR2, etc.).
  • the hopping pattern is explicitly notified from NG RAN20 as well as the number of repetitions.
  • the broadcast information such as SIB may include an information element indicating a hopping pattern.
  • Information elements indicating hopping patterns may be included in RACH-ConfigCommon information, PDCCH-ConfigCommon information, Search Space information, and the like.
  • the hopping pattern is implicitly notified from NG RAN20 as well as the number of repetitions.
  • the hopping pattern may be implicitly notified by RA preamble index, RO, OCC pattern, Initial Bandwidth, or the like.
  • the hopping pattern applied to DCI (PDCCH) for Msg4 is associated with the TRP of Msg2 (RAR) transmitted from gNB100, and may be implicitly notified by the TRP of Msg2 (RAR).
  • Startable Slots The positions of slots (startable slots) where repeated reception / transmission can be started will be described below. As shown in FIG. 12, the positions of the startable slots are defined.
  • the startable slot may be predetermined in the wireless communication system 10.
  • the startable slot may be explicitly notified by NGRAN20.
  • broadcast information such as SIB may include an information element indicating a startable slot.
  • the information element indicating the startable slot may be included in RACH-ConfigCommon information, PDCCH-ConfigCommon information, SearchSpace information, and the like.
  • the information element indicating the startable slot may include an information element indicating the period of the startable slot (for example, RepetitionStartSlotPeriodicity) and an information element indicating the position of the first startable slot in the radio frame (RepetitionStartSlotOffset).
  • FIG. 12 illustrates a case where the RepetitionStartSlotPeriodicity is 3 and the RepetitionStartSlotOffset is 1.
  • Repetition type B is a procedure for repeatedly receiving DCI by monitoring PDCCH in the slot.
  • Repetition type B it is necessary to change the CORESET to be monitored, but repeated reception / transmission is completed in the slot. Therefore, it is possible to suppress an increase in the delay time.
  • DCI The information elements included in the DCI transmitted via each PDCCH will be described below.
  • an information element for example, TDRA
  • the information elements contained in each DCI may be the same, except for the information elements that specify the PDSCH time-wise resources.
  • the information elements included in the DCI transmitted via each PDCCH may be the same.
  • the information elements contained in the DCI transmitted via each PDCCH may be different.
  • the details are the same as Repetition type A described above, so the description thereof will be omitted.
  • the number of repetitions will be described below.
  • the number of repetitions may be determined by the same options as Repetition type A described above. Since the details are the same as those of Repetition type A described above, the description thereof will be omitted.
  • Frequency hopping The frequency hopping of PDCCH will be described below. Frequency hopping may be defined in the same manner as Repetition type A described above. Since the details are the same as those of Repetition type A described above, the description thereof will be omitted.
  • the CORESET will be described below. Since reception / transmission is repeatedly executed in one slot, a mechanism may be introduced in which the UE200 can monitor the number of symbols larger than the maximum number of symbols that can be specified by the existing CORESET (for example, "3"). ..
  • CORESET may be continuously arranged in one slot for repeated reception / transmission.
  • a mechanism may be introduced in which four or more symbols can be set as the number of symbols to be monitored in one slot.
  • an information element (monitoringSymbolsWithinSlot) included in SearchSpace may be set so that two or more CORESETs can be arranged (monitored).
  • the existing search space may be extended.
  • the Search space of the Enhanced UE may be set separately from the search space of the Legacy UE. According to such a configuration, it is possible to suppress the increase in the power consumption of the Legacy UE by suppressing the increase in the monitoring occurrence of the Legacy UE. For Enhanced UE, improvement of PDCCH channel quality can be expected.
  • Symbol start position The positions of symbols (startable symbols) that can start repeated reception / transmission will be described below. As shown in FIG. 15, the position of the startable symbol is defined.
  • the startable symbol may be predetermined in the wireless communication system 10. In such cases, the startable symbol may be the first symbol in the slot.
  • the startable symbol may be explicitly notified by NG RAN20.
  • broadcast information such as SIB may include an information element indicating a startable symbol.
  • the information element indicating the startable symbol may be included in RACH-ConfigCommoninformation, PDCCH-ConfigCommoninformation, SearchSpace information, and the like.
  • the information element indicating the startable symbol may include an information element indicating the period of the startable symbol (for example, RepetitionStartSymbolPeriodicity) and an information element indicating the position of the first startable slot in the radio frame (RepetitionStartSymbolOffset).
  • the information element indicating the startable symbol may be a bitmap indicating the startable symbol. Bitmaps may be referred to as RepetitionStartSymbolPeriodicity. FIG. 15 illustrates a case where the bitmap is ⁇ 10001000100000 ⁇ .
  • the 4-step RACH procedure including the 4-step procedure was illustrated as the RACH procedure.
  • the RACH procedure may be a 2-step RACH procedure that includes a two-step procedure.
  • the message transmitted from the UE 200 to the gNB 100 may be referred to as MsgA
  • the message transmitted from the gNB 100 to the UE 200 may be referred to as MsgB.
  • the DCI (PDCCH) to be repeatedly transmitted contains an information element that specifies the resource of MsgB.
  • the block configuration diagram (FIG. 4) used in the description of the above-described embodiment shows a block of functional units.
  • These functional blocks are realized by any combination of at least one of hardware and software.
  • the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices.
  • the functional block may be realized by combining the software with the one device or the plurality of devices.
  • Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but limited to these I can't.
  • a functional block (configuration unit) that makes transmission function is called a transmitting unit (transmitting unit) or a transmitter (transmitter).
  • the realization method is not particularly limited.
  • FIG. 16 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, 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 word “device” can be read as a circuit, device, unit, etc.
  • the hardware configuration of the device may be configured to include one or more of each of the devices shown in the figure, or may be configured not to include some of the devices.
  • Each functional block of the device (see FIG. 4) is realized by any hardware element of the computer device or a combination of the hardware elements.
  • each function in the device is such that the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the memory 1002, and controls the communication by the communication device 1004, or the memory. It is realized by controlling at least one of reading and writing of data in 1002 and storage 1003.
  • predetermined software program
  • Processor 1001 operates, for example, an operating system to control 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 unit, a register, and the like.
  • CPU central processing unit
  • the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
  • a program program code
  • a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
  • the various processes described above may be executed by one processor 1001 or may be executed simultaneously or sequentially by two or more processors 1001.
  • Processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from the network via a telecommunication line.
  • the memory 1002 is a computer-readable recording medium, and is composed of at least one such as ReadOnlyMemory (ROM), ErasableProgrammableROM (EPROM), Electrically ErasableProgrammableROM (EEPROM), and RandomAccessMemory (RAM). May be done.
  • the memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, or the like that can execute the method according to the embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, for example, an optical disk such as Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, or a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like.
  • Storage 1003 may be referred to as auxiliary storage.
  • the recording medium described above may be, for example, a database, server or other suitable medium containing at least one of the memory 1002 and the storage 1003.
  • the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be composed of.
  • FDD frequency division duplex
  • TDD time division duplex
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • Bus 1007 may be configured using a single bus or may be configured using different buses for each device.
  • the device includes hardware such as a microprocessor, a digital signal processor (Digital Signal Processor: DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), and a Field Programmable Gate Array (FPGA).
  • the hardware may implement some or all of each functional block.
  • processor 1001 may be implemented using at least one of these hardware.
  • information notification includes physical layer signaling (eg Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (eg RRC signaling, Medium Access Control (MAC) signaling, Master Information Block). (MIB), System Information Block (SIB)), other signals or combinations thereof.
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • RRC signaling eg RRC signaling, Medium Access Control (MAC) signaling, Master Information Block). (MIB), System Information Block (SIB)
  • RRC signaling may also be referred to as an RRC message, eg, RRC Connection Setup. ) Message, RRC Connection Reconfiguration message, etc. may be used.
  • LTE LongTermEvolution
  • LTE-A LTE-Advanced
  • SUPER3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • FutureRadioAccess FAA
  • NewRadio NR
  • W-CDMA registered trademark
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access 2000
  • UMB UltraMobileBroadband
  • IEEE802.11 Wi-Fi (registered trademark)
  • IEEE802.16 WiMAX®
  • IEEE802.20 Ultra-WideBand
  • Bluetooth® Ultra-WideBand
  • other systems that utilize appropriate systems and at least one of the next-generation systems extended based on them. It may be applied to one.
  • a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
  • the specific operation performed by the base station in this disclosure may be performed by its upper node (upper node).
  • various operations performed for communication with the terminal are the base station and other network nodes other than the base station (eg, MME or). It is clear that it can be done by at least one of (but not limited to, S-GW, etc.).
  • S-GW network node
  • 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 and signals can be output from the upper layer (or lower layer) to the lower layer (or upper layer).
  • Input / output may be performed via a plurality of network nodes.
  • the input / output information may be stored in a specific location (for example, memory) or may be managed using a management table.
  • the input / output information may be overwritten, updated, or added.
  • 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 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example, a predetermined value). It may be done by comparison with the value).
  • the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.
  • Software whether called software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
  • Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • the software may use 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 create a website.
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
  • a channel and a symbol may be a signal (signaling).
  • the signal may be a message.
  • the component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.
  • system and “network” used in this disclosure are used interchangeably.
  • the information, parameters, etc. described in the present disclosure may be expressed using an absolute value, a relative value from a predetermined value, or another corresponding information. It may be represented.
  • the radio resource may be one indicated by an index.
  • Base Station BS
  • Wireless Base Station Wireless Base Station
  • NodeB NodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
  • the base station can accommodate one or more (for example, three) cells (also called sectors). When a base station accommodates multiple cells, the entire base station coverage area can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a remote radio for indoor use). Communication services can also be provided by Head: RRH).
  • RRH Remote Radio Head
  • cell refers to a part or all of the coverage area of at least one of the base station providing communication services in this coverage and the base station subsystem.
  • MS Mobile Station
  • UE user equipment
  • terminal terminal
  • Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
  • At least one of the base station and the mobile station may be a device mounted on the mobile body, a mobile body itself, or the like.
  • the moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be.
  • at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
  • at least one of a base station and a 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, the same shall apply hereinafter).
  • communication between a base station and a mobile station has been replaced with communication between a plurality of mobile stations (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • Each aspect / embodiment of the present disclosure may be applied to the configuration.
  • the mobile station may have the functions of the base station.
  • words such as "up” and “down” may be read as words corresponding to communication between terminals (for example, "side”).
  • the upstream channel, the downstream channel, and the like may be read as a side channel.
  • the mobile station in the present disclosure may be read as a base station.
  • the base station may have the functions of the mobile station.
  • the wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe.
  • the subframe may be further composed of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
  • the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
  • Numerology includes, for example, SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval: TTI), number of symbols per TTI, wireless frame configuration, transmission / reception. It may indicate at least one of a specific filtering process performed by the machine in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like.
  • the slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time region. Slots may be unit of time based on numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may include a plurality of mini slots.
  • Each minislot may be composed of one or more symbols in the time domain. Further, the mini-slot may be referred to as a sub-slot.
  • a minislot may consist of a smaller number of symbols than the slot.
  • PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A.
  • the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
  • the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
  • the radio frame, subframe, slot, minislot and symbol may use different names corresponding to each.
  • one subframe may be referred to as a transmission time interval (TTI)
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI slot or one minislot
  • at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms. May be.
  • the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • a base station schedules each user terminal to allocate wireless resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit such as a channel-coded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
  • the time interval for example, the number of symbols
  • the transport block, code block, code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
  • TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots and the like.
  • the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms
  • the short TTI (for example, shortened TTI, etc.) may be read as a TTI less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
  • the resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • the number of subcarriers contained in RB may be the same regardless of numerology, and may be, for example, 12.
  • the number of subcarriers contained in the RB may be determined based on numerology.
  • the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI.
  • Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
  • One or more RBs include a physical resource block (Physical RB: PRB), a sub-carrier group (Sub-Carrier Group: SCG), a resource element group (Resource Element Group: REG), a PRB pair, an RB pair, and the like. May be called.
  • Physical RB Physical RB: PRB
  • SCG sub-carrier Group
  • REG resource element group
  • PRB pair an RB pair, and the like. May be called.
  • the resource block may be composed of one or a plurality of resource elements (ResourceElement: RE).
  • RE resource elements
  • 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
  • Bandwidth Part (which may also be called partial bandwidth) may represent a subset of consecutive common resource blocks for a neurology in a carrier. good.
  • the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
  • BWP for UL
  • DL BWP BWP for DL
  • One or more BWPs may be set in one carrier for the UE.
  • At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
  • “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
  • the above-mentioned structures such as wireless frames, subframes, slots, mini slots and symbols are merely examples.
  • the number of subframes contained in a radio frame the number of slots per subframe or radioframe, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in RB.
  • the number of subcarriers, as well as the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
  • connection means any direct or indirect connection or connection between two or more elements and each other. It can include the presence of one or more intermediate elements between two “connected” or “combined” elements.
  • the connection or connection between the elements may be physical, logical, or a combination thereof.
  • connection may be read as "access”.
  • the two elements use at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-comprehensive examples, the radio frequency region.
  • Electromagnetic energies with wavelengths in the microwave and light (both visible and invisible) regions, etc. can be considered to be “connected” or “coupled” to each other.
  • the reference signal can also be abbreviated as Reference Signal (RS), and may be called a pilot (Pilot) depending on the applied standard.
  • RS Reference Signal
  • Pilot pilot
  • each of the above devices may be replaced with a "part”, a “circuit”, a “device”, or the like.
  • references to elements using designations such as “first” and “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Therefore, references to the first and second elements do not mean that only two elements can be adopted there, or that the first element must somehow precede the second element.
  • determining and “determining” used in this disclosure may include a wide variety of actions.
  • “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). It may include (eg, searching in a table, database or another data structure), ascertaining as “judgment” or “decision”.
  • judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. It may include (for example, accessing data in memory) to be regarded as “judgment” or “decision”.
  • judgment and “decision” are considered to be “judgment” and “decision” when the things such as solving, selecting, choosing, establishing, and comparing are regarded as “judgment” and “decision”. Can include. That is, “judgment” and “decision” may include considering some action as “judgment” and “decision”. Further, “judgment (decision)” may be read as “assuming", “expecting”, “considering” and the like.
  • the term "A and B are different” may mean “A and B are different from each other”.
  • the term may mean that "A and B are different from C”.
  • Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
  • Wireless communication system 20 NG-RAN 100 gNB 110 Receiver 120 Transmitter 130 Control 200 UE 210 Wireless signal transmitter / receiver 220 Amplifier 230 Modulator / demodulator 240 Control signal / reference signal processing 250 Encoding / decoding 260 Data transmitter / receiver 270 Control 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus

Landscapes

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

Abstract

Ce terminal comprend une unité de réception qui reçoit des informations de commande par l'intermédiaire d'un canal physique de contrôle descendant dans une procédure de canal d'accès aléatoire et qui reçoit un message par l'intermédiaire d'un canal physique partagé descendant sur la base des informations de commande. L'unité de réception exécute une réception répétitive des informations de commande.
PCT/JP2021/000529 2021-01-08 2021-01-08 Terminal, station de base et procédé de communication radio WO2022149270A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/000529 WO2022149270A1 (fr) 2021-01-08 2021-01-08 Terminal, station de base et procédé de communication radio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/000529 WO2022149270A1 (fr) 2021-01-08 2021-01-08 Terminal, station de base et procédé de communication radio

Publications (1)

Publication Number Publication Date
WO2022149270A1 true WO2022149270A1 (fr) 2022-07-14

Family

ID=82357865

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/000529 WO2022149270A1 (fr) 2021-01-08 2021-01-08 Terminal, station de base et procédé de communication radio

Country Status (1)

Country Link
WO (1) WO2022149270A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024151183A1 (fr) * 2023-01-09 2024-07-18 Telefonaktiebolaget Lm Ericsson (Publ) Signalisation de messages ayant une structure de domaine temporel répétitive pour une communication sans fil
WO2024151185A1 (fr) * 2023-01-09 2024-07-18 Telefonaktiebolaget Lm Ericsson (Publ) Signalisation pour communication sans fil

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "Random access for Rel-13 low complexity and enhanced coverage UEs", 3GPP DRAFT; R2-153717 - RANDOM ACCESS FOR REL-13 LOW COMPLEXITY AND ENHANCED COVERAGE UES, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Beijing, P.R. China; 20150824 - 20150828, 15 August 2015 (2015-08-15), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP050993722 *
QUALCOMM INCORPORATED: "Potential coverage enhancement techniques for other channels", 3GPP TSG-RAN WG1 MEETING #103 R1- 2008628, 1 November 2020 (2020-11-01), XP051940254 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024151183A1 (fr) * 2023-01-09 2024-07-18 Telefonaktiebolaget Lm Ericsson (Publ) Signalisation de messages ayant une structure de domaine temporel répétitive pour une communication sans fil
WO2024151185A1 (fr) * 2023-01-09 2024-07-18 Telefonaktiebolaget Lm Ericsson (Publ) Signalisation pour communication sans fil

Similar Documents

Publication Publication Date Title
JP7499384B2 (ja) 端末
WO2022149270A1 (fr) Terminal, station de base et procédé de communication radio
WO2022079876A1 (fr) Terminal
WO2021171594A1 (fr) Terminal
US20230163915A1 (en) Terminal
WO2021214921A1 (fr) Terminal
WO2022149269A1 (fr) Terminal, station de base et procédé de communication radio
WO2022137559A1 (fr) Terminal et procédé de communication sans fil
CN116746200A (zh) 终端、基站以及无线通信方法
WO2019203185A1 (fr) Terminal utilisateur et station de base sans fil
JP7573643B2 (ja) 端末、基地局、無線通信システム及び無線通信方法
WO2022107256A1 (fr) Équipement utilisateur
WO2022029972A1 (fr) Terminal
WO2022029973A1 (fr) Terminal
WO2022153505A1 (fr) Terminal et station de base radio
WO2022137569A1 (fr) Terminal, station de base et procédé de communication sans fil
WO2022137570A1 (fr) Terminal, station de base et procédé de communication sans fil
WO2022085201A1 (fr) Terminal
WO2022097724A1 (fr) Terminal
WO2022149287A1 (fr) Terminal et station de base radio
WO2022085156A1 (fr) Terminal
WO2022074842A1 (fr) Terminal
WO2022239081A1 (fr) Terminal et procédé de communication sans fil
WO2022102669A1 (fr) Terminal
WO2022244097A1 (fr) Terminal et procédé de communication sans fil

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21917496

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21917496

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP