WO2024009402A1 - Terminal, procédé de communication sans fil et station de base - Google Patents

Terminal, procédé de communication sans fil et station de base Download PDF

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Publication number
WO2024009402A1
WO2024009402A1 PCT/JP2022/026726 JP2022026726W WO2024009402A1 WO 2024009402 A1 WO2024009402 A1 WO 2024009402A1 JP 2022026726 W JP2022026726 W JP 2022026726W WO 2024009402 A1 WO2024009402 A1 WO 2024009402A1
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Prior art keywords
repetitions
msg3
msg1
prach
random access
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PCT/JP2022/026726
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English (en)
Japanese (ja)
Inventor
尚哉 芝池
祐輝 松村
聡 永田
チーピン ピ
ジン ワン
ラン チン
イイ ル
ヨン リ
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株式会社Ｎｔｔドコモ
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Priority to PCT/JP2022/026726 priority Critical patent/WO2024009402A1/fr
Publication of WO2024009402A1 publication Critical patent/WO2024009402A1/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
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities

Definitions

  • the present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system.
  • LTE Long Term Evolution
  • 3GPP Rel. 10-14 is a specification for the purpose of further increasing capacity and sophistication of LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel. 8, 9). was made into
  • LTE Long Term Evolution
  • 5G 5th generation mobile communication system
  • 5G+ plus
  • NR New Radio
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the random access procedure for improving coverage is not clear. If such a random access procedure is not clear, communication throughput may decrease.
  • one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station that improve the coverage of random access procedures.
  • a terminal includes a transmitting unit that transmits first capability information regarding the ability to repeat a message 1 and second capability information regarding the ability to repeat a message 3; Based on the second capability information, a first random access procedure is performed that includes the repetition of the message 1 and the repetition of the message 3, or a second random access procedure that does not include at least one of the repetition of the message 1 and the repetition of the message 3 is performed. and a control unit that determines whether to perform a random access procedure.
  • FIG. 1A and 1B show an example of multi-PRACH transmission.
  • FIG. 2 shows an example of the relationship between PRACH mask index and allowed PRACH occasions (RO) of SSB.
  • FIG. 3 shows an example of the relationship between the 2MSB value (code point) of the MCS information field and the number of repetitions K.
  • 4A and 4B show an example of the relationship between Msg1 and Msg2.
  • FIG. 5 shows an example of the RACH procedure for RSRP with DL path loss reference according to embodiment #1a-1.
  • FIG. 6 shows an example of the RACH procedure for RSRP with DL path loss reference according to Example 1 of Embodiment #1a-2.
  • FIG. 7 shows an example of the RACH procedure for RSRP with DL path loss reference according to Example 2 of Embodiment #1a-2.
  • FIG. 8 shows an example of the RACH procedure for RSRP with DL path loss reference according to the embodiment 1a-3.
  • 9A and 9B show an example of application conditions according to embodiment #1a-4.
  • FIG. 10 shows an example of the RSRP threshold.
  • FIG. 11 shows an example of transmission beam 1-1A.
  • FIG. 12 shows another example of the transmission beam 1-1A.
  • FIG. 13 shows an example of transmission beam 1-1B.
  • FIG. 14 shows a first example of transmit beams 1-2A.
  • FIG. 15 shows a second example of transmit beams 1-2A.
  • FIG. 16 shows a third example of transmit beams 1-2A.
  • FIG. 17 shows a fourth example of transmit beams 1-2A.
  • FIG. 18 shows an example of the transmission beam 2-1A.
  • FIG. 19 shows another example of the transmission beam 2-1A.
  • FIG. 20 shows an example of transmission beam 2-2A.
  • FIG. 21 shows another example of the transmission beam 2-2A.
  • 22A to 22C show examples of candidate values for the number of Msg3 repeats.
  • FIG. 23 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 24 is a diagram illustrating an example of the configuration of a base station according to an embodiment.
  • FIG. 25 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment.
  • FIG. 26 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment.
  • FIG. 27 is a diagram illustrating an example of a vehicle according to an embodiment.
  • the UE performs reception processing (e.g. reception, demapping, demodulation, Controlling at least one of decoding), transmission processing (eg, at least one of transmission, mapping, precoding, modulation, and encoding) is being considered.
  • reception processing e.g. reception, demapping, demodulation, Controlling at least one of decoding
  • transmission processing e.g, at least one of transmission, mapping, precoding, modulation, and encoding
  • the TCI states may represent those that apply to downlink signals/channels. What corresponds to the TCI state applied to uplink signals/channels may be expressed as a spatial relation.
  • the TCI state is information regarding quasi-co-location (QCL) of signals/channels, and may also be called spatial reception parameters, spatial relation information, etc.
  • the TCI state may be set in the UE on a per-channel or per-signal basis.
  • QCL is an index that indicates the statistical properties of a signal/channel. For example, when one signal/channel and another signal/channel have a QCL relationship, the Doppler shift, Doppler spread, and average delay are calculated between these different signals/channels. ), delay spread, and spatial parameters (e.g., spatial Rx parameters) can be assumed to be the same (QCL with respect to at least one of these). You may.
  • the spatial reception parameters may correspond to the UE's reception beam (eg, reception analog beam), and the beam may be identified based on the spatial QCL.
  • QCL or at least one element of QCL in the present disclosure may be read as sQCL (spatial QCL).
  • QCL types A plurality of types (QCL types) may be defined for QCL.
  • QCL types A-D may be provided with different parameters (or parameter sets) that can be assumed to be the same, and the parameters (which may be referred to as QCL parameters) are shown below: ⁇ QCL type A (QCL-A): Doppler shift, Doppler spread, average delay and delay spread, ⁇ QCL type B (QCL-B): Doppler shift and Doppler spread, ⁇ QCL type C (QCL-C): Doppler shift and average delay, - QCL type D (QCL-D): Spatial reception parameters.
  • Control Resource Set CORESET
  • channel or reference signal is in a particular QCL (e.g. QCL type D) relationship with another CORESET, channel or reference signal, It may also be called a QCL assumption.
  • QCL Control Resource Set
  • the UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for the signal/channel based on the TCI state or QCL assumption of the signal/channel.
  • Tx beam transmit beam
  • Rx beam receive beam
  • the TCI state may be, for example, information regarding the QCL between a target channel (in other words, a reference signal (RS) for the channel) and another signal (for example, another RS). .
  • the TCI state may be set (indicated) by upper layer signaling, physical layer signaling, or a combination thereof.
  • the physical layer signaling may be, for example, downlink control information (DCI).
  • DCI downlink control information
  • Channels for which TCI states or spatial relationships are set are, for example, Physical Downlink Shared Channel (PDSCH), Physical Downlink Control Channel (PDCCH), and Uplink Shared Channel (Physical Uplink Shared Channel).
  • the channel may be at least one of a physical uplink control channel (PUCCH) and a physical uplink control channel (PUCCH).
  • the RS that has a QCL relationship with the channel is, for example, a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a measurement reference signal (Sounding Reference Signal (SRS)), tracking CSI-RS (also referred to as Tracking Reference Signal (TRS)), and QCL detection reference signal (also referred to as QRS).
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • SRS Sounding Reference Signal
  • TRS Tracking Reference Signal
  • QRS QCL detection reference signal
  • the SSB is a signal block that includes at least one of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH physical broadcast channel
  • An RS of QCL type X in a TCI state may mean an RS that has a QCL type You can.
  • the UE receives SS/PBCH blocks (SSB), Msg. 1 (PRACH/random access preamble/preamble) transmission, Msg. 2 (PDCCH, PDSCH including random access response (RAR)), Msg. 3 (PUSCH scheduled by RAR UL grant) transmission, Msg. 4 (PDCCH, PDSCH including UE contention resolution identity).
  • SSB SS/PBCH blocks
  • Msg. 1 PRACH/random access preamble/preamble
  • Msg. 2 PDCCH, PDSCH including random access response (RAR)
  • Msg. 3 PUSCH scheduled by RAR UL grant
  • Msg. 4 (PDCCH, PDSCH including UE contention resolution identity).
  • SSB reception includes PSS detection, SSS detection, PBCH-DMRS detection, and PBCH reception.
  • PSS detection performs detection of part of the physical cell ID (PCI), detection (synchronization) of OFDM symbol timing, and (coarse) frequency synchronization.
  • SSS detection includes detection of physical cell ID.
  • PBCH-DMRS detection involves detection of (part of) the SSB index within a half radio frame (5ms).
  • PBCH reception involves detecting the system frame number (SFN) and radio frame timing (SSB index), receiving configuration information for receiving remaining minimum system information (RMSI, SIB1), and allowing the UE to camp in that cell (carrier). including the recognition of whether or not.
  • the SSB has a band of 20 RB and a time of 4 symbols.
  • the SSB transmission cycle can be set from ⁇ 5, 10, 20, 40, 80, 160 ⁇ ms.
  • a plurality of SSB symbol positions are defined based on the frequency range (FR1, FR2).
  • PBCH has a 56-bit payload. N repetitions of the PBCH are transmitted within a period of 80ms. N depends on the SSB transmission period.
  • SIB1 includes information for performing RACH settings and RACH procedures.
  • the time/frequency resource relationship between the SSB and the PDCCH monitoring resource for SIB1 is set by the PBCH.
  • a base station that uses beam correspondence transmits multiple SSBs using multiple beams in each SSB transmission period.
  • Each of the plurality of SSBs has a plurality of SSB indexes.
  • a UE that detects one SSB transmits a PRACH in the RACH occasion associated with that SSB index and receives a RAR in the RAR window.
  • beam and coverage In high frequency bands, if beamforming is not applied to the synchronization signal/reference signal, the coverage will be narrow and it will be difficult for the UE to discover the base station. On the other hand, if beamforming is applied to the synchronization signal/reference signal to ensure coverage, a strong signal will reach in a specific direction, but it will be more difficult for the signal to reach in other directions. If the direction in which the UE exists is unknown at the base station before the UE is connected, it is impossible to transmit synchronization signals/reference signals using beams directed only in appropriate directions. A possible method is that the base station transmits multiple synchronization signals/reference signals, each having beams in different directions, and the UE recognizes which beam it has discovered. Using thin (narrow) beams for coverage requires transmitting many synchronization/reference signals, which may increase overhead and reduce spectrum efficiency.
  • Coverage extension including PRACH extension for frequency range (FR) 2 is being considered. For example, PRACH repetition using the same beam or different beams is being considered. This PRACH extension may be applied to FR1.
  • PRACH extension may be applied to the short PRACH format or to other formats.
  • the common RACH configuration includes the general RACH configuration (rach-ConfigGeneric), the total number of RA preambles (totalNumberOfRA-Preambles), the SSB for each RACH occasion, and the contention-based (CB) preamble for each SSB (ssb-perRACH). -OccasionAndCB-PreamblesPerSSB).
  • the rach-ConfigGeneric may include a PRACH configuration index (prach-ConfigurationIndex) and a message 1FDM (msg1-FDM, number of PRACH occasions to be FDMed within one time instance).
  • ssb-perRACH-OccasionAndCB-PreamblesPerSSB may include the number of CB preambles for each SSB for the number of SSBs for each RACH occasion 1/8 (oneEighth, one SSB is associated with eight RACH occasions).
  • the UE determines the number N of SS/PBCH blocks associated with one PRACH occasion and the SS /The number R of CB preambles per PBCH block may be applied by ssb-perRACH-OccasionAndCB-PreamblesPerSSB.
  • N_preamble ⁇ total is given by totalNumberOfRA-Preambles for type 1 random access procedure and msgA-TotalNumberOfRA-Preambles for type 2 random access procedure with configuration of PRACH occasion independent of type 1 random access procedure. given by. N_preamble ⁇ total is a multiple of N.
  • the association period for mapping SS/PBCH blocks to PRACH occasions is such that N_Tx ⁇ SSB SS/PBCH block indexes are mapped to PRACH occasions at least once within the association period.
  • N_Tx ⁇ SSB is the minimum value in the set determined by the PRACH configuration period according to the relationship (relationship defined in the specification) between the PRACH configuration period and the association period (number of PRACH configuration periods).
  • the UE obtains N_Tx ⁇ SSB from the value of SSB positions in bursts (ssb-PositionsInBurst) in SIB1 or in the common serving cell configuration (ServingCellConfigCommon).
  • the SS/PBCH block index is also not mapped to a PRACH occasion or its set of PRACH preambles.
  • the association pattern period includes one or more association periods and is determined such that the pattern between PRACH occasion and SS/PBCH block index repeats at most every 160 ms. If there is a PRACH occasion that is not associated with an SS/PBCH block index after an integer number of association periods, that PRACH occasion is not used for PRACH.
  • the association period is ⁇ 1, 2, 4, 8, 16 ⁇ , ⁇ 1, 2, 4, 8 ⁇ , ⁇ 1, 2, 4 ⁇ , ⁇ 1, 2 ⁇ , and ⁇ 1 ⁇ .
  • One RO is associated with SSBs 0 to 3.
  • Preamble indexes 0 to 15 are associated with SSB0
  • preamble indexes 15 to 31 are associated with SSB1
  • preamble indexes 32 to 47 are associated with SSB2
  • SSB3 is associated with preamble indexes 48 to 63
  • SSB3 is associated with SSB3.
  • the same RO is associated with different SS/PBCH block indices and different preambles use different SS/PBCH block indices.
  • the base station can distinguish the associated SS/PBCH block index by the received PRACH.
  • the random access preamble can only be transmitted on the time resources specified in the random access configuration of the specification, whether it is FR1 or FR2, and the spectrum type (paired spectrum/supplementary uplink (SUL)/unpaired spectrum). (unpaired) spectrum).
  • the PRACH configuration index is given by the upper layer parameter prach-ConfigurationIndex or, if configured, by msgA-PRACH-ConfigurationIndex.
  • the type of RACH procedure may be at least one of the following: ⁇ Contention-free random access (CFRA), PDCCH ordered RA (PDCCH ordered RA, RA initiated by PDCCH order), CFRA for beam failure recovery (BFR), CFRA for system information (SI) request, synchronization CFRA for reconfiguration with sync, etc. - contention-based random access (CBRA), RA triggered by MAC entity, RA triggered by RRC with event, CBRA for BFR, etc. ⁇ 4 step RACH. ⁇ 2 step RACH.
  • PRACH repetition is not clear. For example, it is not clear how PRACH resources for repetition (eg, repetition pattern, number of repetitions) are configured, UE behavior of preamble repetition transmission, impact on RACH-related counters/timers, etc. If such settings/procedures are not clear, there is a risk of deterioration in communication quality/communication throughput.
  • PRACH resources for repetition eg, repetition pattern, number of repetitions
  • UE behavior of preamble repetition transmission impact on RACH-related counters/timers, etc. If such settings/procedures are not clear, there is a risk of deterioration in communication quality/communication throughput.
  • the RA response window (ra-ResponseWindow) is a time window for monitoring the RA response (RAR) (SpCell only).
  • the RA contention resolution timer (ra-ContentionResolutionTimer) is a timer for RA contention resolution (SpCell only).
  • Msg. B response window is a time window for monitoring RA response (RAR) for two-step RA type (SpCell only).
  • the MAC entity performs actions 1 to 3 below, regardless of the possibility that a measurement gap may occur.
  • the MAC entity performs the following actions 2-1 and 2-2.
  • the MAC entity starts the ra-ResponseWindow configured in the common RACH configuration (RACH-ConfigCommon) in the first PDCCH occasion from the end of the RA preamble transmission.
  • the MAC entity monitors the PDCCH transmission of the SpCell for RAR identified by the RA-RNTI while the ra-ResponseWindow is operating.
  • the MAC entity may stop ra-ResponseWindow (may stop monitoring for RARs) after successful reception of RARs containing RA preamble identifiers matching the transmitted PREAMBLE_INDEX.
  • PDCCH monitoring within the RA response window There are two cases for PDCCH monitoring within the RA response window: PDCCH for base station response to BFR and PDCCH for RAR. The following may apply to both cases.
  • the MAC entity performs actions 4 to 6 below, regardless of the possibility of a measurement gap occurring.
  • msgB-ResponseWindow is the first of the earliest CORESET the UE is configured to receive a PDCCH for type 1-PDCCH CSS set that is at least one symbol after the last symbol of the PRACH occasion corresponding to the PRACH transmission. It may start at the symbol.
  • the length of msgB-ResponseWindow may correspond to the SCS for Type 1-PDCCH CSS set.
  • the MAC entity monitors the PDCCH transmission of the SpCell for the RAR identified by the MSGB-RNTI while the msgB-ResponseWindow is active.
  • RA-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id
  • the subcarrier spacing (SCS) for determining t_id is based on the value of ⁇ .
  • ul_carrier_id is the UL carrier used for RA preamble transmission (0 for normal uplink (NUL) carriers, 1 for supplementary uplink (SUL) carriers).
  • RA-RNTI is calculated according to specifications.
  • RA-RNTI is an RNTI for 4-step RACH.
  • MSGB-RNTI 1+s_id+14 ⁇ t_id+14 ⁇ 80 ⁇ f_id+14 ⁇ 80 ⁇ 8 ⁇ ul_carrier_id+14 ⁇ 80 ⁇ 8 ⁇ 2
  • the subcarrier spacing (SCS) for determining t_id is based on the value of ⁇ .
  • ul_carrier_id is the UL carrier used for RA preamble transmission (0 for normal uplink (NUL) carriers, 1 for supplementary uplink (SUL) carriers).
  • MSGB-RNTI is an RNTI for 2-step RACH.
  • DCI format 1_0 includes a DCI format identifier field, a bit field that is always set to 1, and a frequency domain resource assignment field. If the cyclic redundancy check (CRC) of DCI format 1_0 is scrambled by C-RNTI and the frequency domain resource allocation field is all ones, then that DCI format 1_0 is for random access procedure initiated by PDCCH order and the rest
  • the fields are random access preamble, UL/supplementary Uplink (SUL) indicator, SS/PBCH index (SSB index), PRACH mask index, and reserved bits (12 bits).
  • the PRACH mask index field specifies that if the value of the Random Access Preamble Index field is non-zero, the PRACH occasion is the SS/PBCH block i indicated by the SS/PBCH block index field of the PDCCH order. indicates the PRACH occasion of the PRACH transmission associated with the index.
  • the PRACH mask index is indicated by ra-ssb-OccasionMaskIndex.
  • the ra-ssb-OccasionMaskIndex indicates the PRACH occasion for the PRACH transmission that is associated with the selected SS/PBCH block index.
  • PRACH occasions are mapped consecutively for each corresponding SS/PBCH block index.
  • the PRACH occasion indexing indicated by the mask index value is reset every SS/PBCH block index and every successive PRACH occasion mapping cycle.
  • the UE selects the PRACH occasion indicated by the PRACH mask index value for the indicated SS/PBCH block index for PRACH transmission in the first available mapping cycle.
  • the order of PRACH occasions is as follows. - First, increasing order of frequency resource index for frequency multiplexed PRACH occasions. - Second, increasing order of time resource index for time multiplexed PRACH occasions within a PRACH slot. - Third, ascending order of PRACH slot index.
  • the value of ra-OccasionList indicates the list of PRACH occasions for PRACH transmissions, and the PRACH occasions are csi-RS is associated with the selected CSI-RS index indicated by .
  • the indexing of PRACH occasions indicated by ra-OccasionList is reset every association pattern period.
  • the value of the PRACH mask index value (msgA-SSB-SharedRO-MaskIndex) is associated with the allowed PRACH occasions of the SSB (the value of the PRACH occasion index).
  • the random access procedure is initiated by the PDCCH order, by the MAC entity itself, or by RRC for specification compliant events. Only one random access procedure is ongoing within a MAC entity at any given time.
  • the SCell random access procedure is initiated only by PDCCH orders with ra-PreambleIndex different from 0b000000.
  • the MAC entity When a random access procedure is initiated on the serving cell, the MAC entity does the following: - If a random access procedure is initiated by a PDCCH order and the ra-PreambleIndex explicitly provided by the PDCCH is not 0b000000, or if a random access procedure is initiated for reconfiguration with synchronization, If contention-free random access resources of step RA type are explicitly provided by rach-ConfigDedicated for the BWP selected for the random access procedure, set RA_TYPE to 4-stepRA.
  • the MAC entity does the following: - If ra-PreambleIndex is explicitly provided by PDCCH and ra-PreambleIndex is not 0b000000, set PREAMBLE_INDEX to the notified ra-PreambleIndex and select the SSB notified by PDCCH.
  • MAC next available PRACH occasion from the PRACH occasions allowed by the restriction given by ra-ssb-OccasionMaskIndex and corresponding to the selected SSB (MAC).
  • the entity randomly selects a PRACH occasion among consecutive PRACH occasions with equal probability, corresponding to the selected SSB, according to the specification.
  • the MAC entity selects the next available PRACH corresponding to the selected SSB.
  • the possibility of measurement gaps may be considered).
  • N_(T,2) is the duration of N_2 symbols corresponding to the PUSCH preparation time of UE processing capability 1. It is assumed that ⁇ corresponds to the minimum SCS setting between the subcarrier spacing (SCS) setting of the PDCCH order and that of the corresponding PRACH transmission.
  • SCS subcarrier spacing
  • ⁇ _BWPSwitching 0, otherwise ⁇ _BWPSwitching is defined in the specification.
  • ⁇ _delay 0.5 msec
  • ⁇ _delay 0.25 msec
  • T_switch is the switching gap duration defined in the specification.
  • PRACH occasion ⁇ Conditions for valid/invalid of PRACH occasion (valid conditions)> All PRACH occasions are valid in paired spectrum (FDD) or SUL bands. In unpaired spectrum (TDD), PRACH occasions may comply with regulations 1 and 2 below. [Regulation 1] In case the UE is not provided with tdd-UL-DL-ConfigurationCommon, the PRACH occasion within the PRACH slot does not precede the SS/PBCH block within the PRACH slot and is at least N_gap symbols from the last SS/PBCH block received symbol. If it starts later, the PRACH occasion is valid.
  • N_gap is defined in the specifications.
  • channelAccessMode semistatic is provided, there is no overlap with the set of consecutive symbols before the start of the next channel occupation time that the UE does not transmit.
  • the candidate SS/PBCH block index of the SS/PBCH block corresponds to the SS/PBCH block index provided by ssb-PositionsInBurst in SIB1 or in ServingCellConfigCommon.
  • the PRACH occasion within the PRACH slot is valid in the following cases: - The PRACH occasion is within the UL symbol.
  • Step 4 in CBRA Rel.
  • Step 4 (Msg4) in the RA procedure of 16 NR follows the Step 4 operation below.
  • DCI format in response to a PUSCH transmission scheduled by RAR UL grant or in response to a corresponding PUSCH retransmission scheduled by DCI format 0_0 with CRC scrambled by TC-RNTI provided in the corresponding RAR message. If the UE detects that the PDCCH carrying that DCI format is used by the UE for PRACH association, regardless of whether the UE is provided with TCI status for the CORESET in which the UE received the PDCCH with that DCI format.
  • the same DM-RS antenna port QCL properties as the DM-RS antenna port quasi co-location (QCL) properties for the SS/PBCH block may be assumed.
  • the UE In response to the PRACH transmission, the UE attempts to detect DCI format 1_0 with the CRC scrambled by the corresponding RA-RNTI during the window controlled by the above-mentioned upper layers.
  • the window Start In the first symbol of the earliest CORESET in which the UE is configured to receive a PDCCH for a type 1-PDCCH CSS set, i.e. at least one symbol after the last symbol of the PRACH occasion corresponding to the PRACH transmission, the window Start.
  • the symbol period corresponds to the SCS for Type 1-PDCCH CSS set.
  • the length of the window is based on the SCS for type 1-PDCCH CSS set and is provided by ra-responseWindow as the number of slots.
  • the UE attempts to detect a DCI format 1_0 with a CRC scrambled by the corresponding RA-RNTI in response to a PRACH transmission initiated by a PDCCH order triggering a CFRA procedure for the SpCell, the UE detects that DCI format It may be assumed that the PDCCH including 1_0 and its PDCCH order have the same DMRS antenna port QCL properties.
  • the UE decides whether to apply Msg3 repetition based on RSRP. If Msg repetition is configured and the RSRP of DL path loss reference is less than rsrp-ThresholdMsg3, the MAC entity assumes that Msg3 repetition is applicable to the current random access (RA) procedure.
  • RA random access
  • the UE can request Msg3PUSCH repetition via a separate PRACH resource. If there is one or more sets of RA resources available, and one of the one or more sets is used to direct all functions that trigger this RA procedure, and all functions that trigger this RA procedure.
  • the MAC entity selects an RA resource if and when there is one or more sets of available RA resources configured with instructions for a subset of the functionality of the MAC entity. If Msg3 repetition indication is configured for a set of RA resources, and Msg3 repetition is not available, the MAC entity considers that set of RA resources not available for RACH procedures.
  • RA resources may be partitioned for each function.
  • the functionality may include at least one of Msg3 repetition, reduced capacity (RedCap), small data transmission (SDT), and RAN slicing.
  • SIB1 includes ServingCellConfigCommonSIB. It includes UplinkConfigCommonSIB. It includes BWP-UplinkCommon (UL BWP common settings).
  • BWP-UplinkCommon may include RACH common settings (RACH-ConfigCommon or MsgA-ConfigCommon) and additionalRACH-ConfigList-r17 (additional RACH configuration list).
  • additionalRACH-ConfigList-r17 may include rsrp-ThresholdMsg3-r17 (threshold).
  • the RACH common settings may include FeatureCombinationPreambles.
  • FeatureCombinationPreambles associates one set (partition) of preambles with one feature combination.
  • FeatureCombinationPreambles may include FeatureCombination (feature combination setting), startPreambleForThisPartition (index of first preamble), numberOfPreamblesPerSSB-ForThisPartition (number of preambles), and ssb-SharedRO-MaskIndex-r17 (PRACH mask index).
  • FeatureCombination includes at least one of redCap (RedCap), smallData (SDT), sliceGroup (RAN slicing), and msg3-Repetition (Msg3 repetition). The partition is given by the index of the first preamble and the preamble number.
  • the number of Msg3 repetitions is indicated by the 2 most significant bits (MSB) (upper 2 bits) of the modulation and coding scheme (MCS) field in the RAR UL grant.
  • MSB most significant bits
  • MCS modulation and coding scheme
  • FIG. 3 shows an example of the relationship (table) between the 2MSB value (code point) of the MCS information field and the number of repetitions K.
  • PUSCH repetition type A when transmitting a PUSCH scheduled by a RAR UL grant, the 2MSB of the MCS information field of the RAR UL grant is set according to the table in FIG. 3, based on whether the upper layer parameter numberOfMsg3Repetitions is set.
  • the number of slots N used for transport block size (TBS) determination is equal to one.
  • PUSCH repetition type B when transmitting a PUSCH scheduled by DCI format 0_0 with CRC scrambled by TC-RNTI, the 2MSB of the MCS information field of that DCI format determines whether the upper layer parameter numberOfMsg3Repetitions is set or not. Based on the table of FIG. 3, we provide code points for determining the number of iterations K. The number of slots N used for TBS determination is equal to 1.
  • Rel.17 the UE capability of Msg3 repetition was introduced and Rel. 18, the introduction of the UE capability of repeating Msg3 is being considered.
  • the following problems can be considered.
  • A/B and “at least one of A and B” may be read interchangeably. Furthermore, in the present disclosure, “A/B/C” may mean “at least one of A, B, and C.”
  • Radio Resource Control RRC
  • RRC parameters RRC parameters
  • RRC messages RRC messages
  • upper layer parameters information elements (IEs), settings, etc.
  • IEs information elements
  • CE Medium Access Control Element
  • update command activation/deactivation command, etc.
  • the upper layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), or the like.
  • Broadcast information includes, for example, a master information block (MIB), a system information block (SIB), a minimum system information (RMSI), and other system information ( Other System Information (OSI)) may also be used.
  • MIB master information block
  • SIB system information block
  • RMSI minimum system information
  • OSI Other System Information
  • the physical layer signaling may be, for example, downlink control information (DCI), uplink control information (UCI), etc.
  • DCI downlink control information
  • UCI uplink control information
  • an index an identifier (ID), an indicator, a resource ID, etc.
  • ID an identifier
  • indicator an indicator
  • resource ID a resource ID
  • sequences, lists, sets, groups, groups, clusters, subsets, etc. may be used interchangeably.
  • a panel, a UE panel, a panel group, a beam, a beam group, a precoder, an uplink (UL) transmitting entity, a transmission/reception point (TRP), a base station, and a spatial relation information (SRI) are described.
  • SRS resource indicator SRI
  • control resource set CONtrol REsource SET (CORESET)
  • Physical Downlink Shared Channel PDSCH
  • codeword CW
  • Transport Block Transport Block
  • TB transport Block
  • RS reference signal
  • antenna port e.g. demodulation reference signal (DMRS) port
  • antenna port group e.g.
  • DMRS port group groups (e.g., spatial relationship groups, Code Division Multiplexing (CDM) groups, reference signal groups, CORESET groups, Physical Uplink Control Channel (PUCCH) groups, PUCCH resource groups), resources (e.g., reference signal resources, SRS resource), resource set (for example, reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI Unified TCI state, common TCI state, quasi-co-location (QCL), QCL assumption, etc. may be read interchangeably.
  • groups e.g., spatial relationship groups, Code Division Multiplexing (CDM) groups, reference signal groups, CORESET groups, Physical Uplink Control Channel (PUCCH) groups, PUCCH resource groups
  • resources e.g., reference signal resources, SRS resource
  • resource set for example, reference signal resource set
  • CORESET pool downlink Transmission Configuration Indication state (TCI state) (DL TCI state), up
  • the SSB/CSI-RS index/indicator, beam index, and TCI state may be read interchangeably.
  • RACH resource, RA resource, PRACH preamble, occasion, RACH occasion (RO), PRACH occasion, repetition resource, repetition configuration resource, resource configured for RO/repetition, time instance and frequency instance, time Resources and frequency resources, RO/preamble resources, and repetition may be read interchangeably.
  • period, period, frame, subframe, slot, symbol, occasion, and RO may be read interchangeably.
  • PDCCH order, PDCCH order DCI, DCI format 1_0, and message (Msg) 0 may be read interchangeably.
  • PRACH, preamble, PRACH preamble, sequence, preamble format, and Msg1 may be read interchangeably.
  • the response to PRACH, the base station response to RAR, Msg2, MsgB, Msg4, and BFR, and the DCI that schedules the response may be read interchangeably.
  • transmissions other than PRACH in the random access procedure, Msg3, PUSCH scheduled by RAR, HARQ-ACK/PUCCH for Msg4, and MsgA PUSCH may be interchanged.
  • Msg3, PUSCH scheduled by RAR UL grant, and RRC connection request may be interchanged.
  • Msg4 contention resolution, RRC connection setup, and PDSCH with UE contention resolution identity may be interchanged.
  • beam, SSB, and SSB index may be read interchangeably.
  • the DL path loss reference, PL-RS, SSB, and CSI-RS may be read interchangeably.
  • repeat period repeat configuration period
  • repeat period repeat period
  • repeat cycle repeat cycle
  • a random access (RA) procedure CFRA/CBRA, 4-step RACH/2-step RACH, a specific type of random access procedure, a random access procedure using a specific PRACH format, a random access procedure initiated by a PDCCH order.
  • a random access procedure not initiated by a PDCCH order and a random access procedure initiated by an upper layer may be interchanged.
  • Each embodiment may assume the following cases 1 and 2 (case 1 and case 2 described above).
  • [Case 1] One RAR may be sent for multiple repetitions of Msg1 (FIG. 4A).
  • [Case 2] One RAR may be sent for each iteration of multiple iterations of Msg1 (FIG. 4B).
  • the UE may transmit first capability information regarding the repeat capability of Msg1 and second capability information regarding the repeat capability of Msg3. Based on the first capability information and the second capability information, the UE performs a first random access procedure including repeating Msg1 and repeating Msg3, or performs a first random access procedure including repeating Message 1 and repeating Message 3. It may be determined whether to perform a second random access procedure that does not include at least one.
  • the type of RACH resource may be at least one of the following types. - One or more sets of RACH resources for RACH procedures without Msg1 or Msg3 repetitions. - One or more sets of RACH resources for RACH procedures with Msg3 repetitions and without Msg1 repetitions. - One or more sets of RACH resources for RACH procedures with Msg1 repetitions and without Msg3 repetitions.
  • the number of Msg1/Msg3 repetitions may be different between multiple sets of RACH resources for RACH procedures with Msg1/Msg3 repetitions.
  • Example 1 It may be specified that the UE is not assumed to report Msg1 repeat capability and Msg3 repeat capability at the same time.
  • a UE that reports both Msg1 repetition capability and Msg3 repetition capability determines whether to perform only Msg1 repetition or only Msg3 repetition within one RACH procedure based on a certain condition.
  • the condition may be an RSRP condition of SSB.
  • the UE may follow at least one of the following several UE actions:
  • range 1 If the RSRP of the selected SSB is within range 1, the UE determines that only Msg1 repetitions are applied for subsequent RACH procedures.
  • range 1 may have an RSRP of at least one of smaller than threshold 1 and larger than threshold 2.
  • range 2 If the RSRP of the selected SSB is within range 2, the UE determines that only Msg3 repetitions are applied for subsequent RACH procedures.
  • range 2 may have an RSRP of at least one of smaller than threshold 3 and larger than threshold 4.
  • range 3 If the RSRP of the selected SSB is within range 3, the UE determines that neither Msg1 nor Msg3 repetitions are applied for subsequent RACH procedures.
  • range 3 may be that the RSRP is greater than threshold 5.
  • - Range 1/2/3/threshold 1/2/3/4/5 may be defined in the specification or may be indicated by the base station via the PBCH/SIB1 PDSCH/RRC IE.
  • FIG. 5 shows an example of the RACH procedure for RSRP with DL path loss reference according to embodiment #1a-1.
  • Rel. 16 UEs with two-step RACH capability apply two-step RACH if RSRP is greater than or equal to rsrp-ThresholdMsgA.
  • Rel. 16 UEs with 2-step RACH capability apply 4-step RACH if RSRP is lower than rsrp-ThresholdMsgA.
  • RA resources for 2-step RACH and 4-step RACH may be selected from pool #1.
  • a UE with a capability of 17 Msg3 repetitions applies a 4-step RACH without Msg3 repetitions if the RSRP is above the threshold rsrp-ThresholdMsg3, and 4 steps with Msg3 repetitions if the RSRP is lower than the threshold rsrp-ThresholdMsg3.
  • RA resources for 2-step RACH, 4-step RACH without Msg3 repetition may be selected from pool #1.
  • RA resources for 4-step RACH with Msg3 repetition may be selected from pool #2.
  • a UE with a capability of 18 Msg1 repetitions applies a 4-step RACH without Msg1 repetitions if the RSRP is above the threshold rsrp-ThresholdMsg1 and 4 steps with Msg1 repetitions if the RSRP is lower than the threshold rsrp-ThresholdMsg1.
  • Step RACH may be applied.
  • RA resources for 2-step RACH, 4-step RACH without Msg1 repetition may be selected from pool #1.
  • RA resources for 4-step RACH with Msg1 repetition may be selected from pool #3.
  • a UE that supports Msg1 repetition and Msg3 repetition may apply 2-step RACH if RSRP is greater than or equal to rsrp-ThresholdMsgA. If RSRP is lower than rsrp-ThresholdMsgA and greater than or equal to threshold rsrp-ThresholdMsg3, the UE may apply 4-step RACH without Msg1 or Msg3 repetitions. If the RSRP is lower than the threshold rsrp-ThresholdMsg3 and greater than or equal to the threshold rsrp-ThresholdMsg1, the UE may apply 4-step RACH with Msg3 repetitions and without Msg1 repetitions.
  • the UE may apply 4-step RACH with Msg1 repetitions and without Msg3 repetitions.
  • RA resources for 2-step RACH, 4-step RACH without Msg1 repetition and Msg3 repetition may be selected from pool #1.
  • RA resources for 4-step RACH with Msg3 repetitions and without Msg1 repetitions may be selected from pool #2.
  • RA resources for 4-step RACH with Msg1 repetition and without Msg3 repetition may be selected from pool #3.
  • the type of RACH resource may be at least one of the following types. - One or more sets of RACH resources for RACH procedures without Msg1 or Msg3 repetitions. - One or more sets of RACH resources for RACH procedures with Msg3 repetitions and without Msg1 repetitions. - One or more sets of RACH resources for RACH procedures with Msg1 repetitions and without Msg3 repetitions. - One or more sets of RACH resources for RACH procedures with both Msg1 and Msg3 repetitions.
  • the number of Msg1/Msg3 repetitions may be different between multiple sets of RACH resources for RACH procedures with Msg1/Msg3 repetitions.
  • UE behavior may be based on certain conditions.
  • the condition may be an RSRP condition of SSB.
  • Each UE operation may correspond to a range of SSB RSRPs.
  • the condition may be at least one of SSB RSRP being equal to or greater than threshold 1 and lower than threshold 2.
  • Threshold 1 may be rsrp-Threshold-NoRep.
  • the condition may be at least one of the following: the SSB RSRP is equal to or greater than the threshold value 3, or lower than the threshold value 4.
  • Threshold 3 may be rsrp-Threshold-NoRep.
  • Threshold 4 may be rsrp-ThresholdMsg3.
  • the condition may be at least one of SSB RSRP being equal to or greater than the threshold value 5 and lower than the threshold value 6.
  • Threshold 6 may be rsrp-ThresholdMsg1.
  • the threshold values 1/2/3/4/5/6 may be defined in the specifications or may be instructed by the base station via the PBCH/SIB1 PDSCH/RRC IE.
  • Each UE operation may correspond to a range of SSB RSRPs.
  • the condition may be at least one of SSB RSRP being equal to or greater than threshold 1 and lower than threshold 2.
  • Threshold 1 may be rsrp-ThresholdMsg3.
  • the condition may be at least one of SSB RSRP being equal to or greater than the threshold value 5 and lower than the threshold value 6.
  • Threshold 5 may be rsrp-ThresholdMsg1.
  • Threshold 6 may be rsrp-ThresholdMsg3.
  • Msg1 repeats are applied.
  • the condition may be at least one of the following: the SSB RSRP is equal to or greater than the threshold value 3, or lower than the threshold value 4.
  • Threshold 3 may be rsrp-ThresholdMsg3.
  • Threshold 4 may be rsrp-ThresholdMsg1.
  • the condition may be at least one of the following: the SSB RSRP is equal to or greater than the threshold value 7, or lower than the threshold value 8.
  • the threshold 8 may be rsrp-ThresholdMsg1Msg3.
  • the threshold values 1/2/3/4/5/6/7/8 may be defined in the specifications, or may be instructed by the base station via the PBCH/SIB1 PDSCH/RRC IE.
  • Msg3 becomes more of a bottleneck than Msg1. Therefore, if Msg1 repeats are required, it is preferred that Msg3 repeats are also required. This makes Example 1 more preferred than Example 2.
  • FIG. 6 shows an example of the RACH procedure for RSRP with DL path loss reference according to Example 1 of Embodiment #1a-2.
  • a UE that supports Msg1 repetition and Msg3 repetition may apply 2-step RACH if RSRP is greater than or equal to rsrp-ThresholdMsgA. If RSRP is lower than rsrp-ThresholdMsgA and greater than or equal to threshold rsrp-ThresholdMsg3, the UE may apply 4-step RACH without Msg1 or Msg3 repetitions. If the RSRP is lower than the threshold rsrp-ThresholdMsg3 and greater than or equal to the threshold rsrp-ThresholdMsg1, the UE may apply 4-step RACH with Msg3 repetitions and without Msg1 repetitions.
  • the UE may apply 4-step RACH with Msg1 and Msg3 repetitions.
  • RA resources for 2-step RACH, 4-step RACH without Msg1 repetition and Msg3 repetition may be selected from pool #1.
  • RA resources for 4-step RACH with Msg3 repetitions and without Msg1 repetitions may be selected from pool #2.
  • RA resources for 4-step RACH with Msg1 repeat and Msg3 repeat may be selected from pool #3.
  • FIG. 7 shows an example of the RACH procedure for RSRP with DL path loss reference according to Example 2 of Embodiment #1a-2.
  • a UE that supports Msg1 repetition and Msg3 repetition may apply 2-step RACH if RSRP is greater than or equal to rsrp-ThresholdMsgA. If RSRP is lower than rsrp-ThresholdMsgA and greater than or equal to threshold rsrp-ThresholdMsg3, the UE may apply 4-step RACH without Msg1 or Msg3 repetitions. If the RSRP is lower than the threshold rsrp-ThresholdMsg3 and greater than or equal to the threshold rsrp-ThresholdMsg1, the UE may apply 4-step RACH with Msg3 repetitions and without Msg1 repetitions.
  • the UE may apply 4-step RACH with Msg1 repetitions and without Msg3 repetitions. If the RSRP is lower than the threshold rsrp-ThresholdMsg1Msg3, the UE may apply 4-step RACH with Msg1 and Msg3 repetitions.
  • RA resources for 2-step RACH, 4-step RACH without Msg1 repetition and Msg3 repetition may be selected from pool #1.
  • RA resources for 4-step RACH with Msg3 repetitions and without Msg1 repetitions may be selected from pool #2.
  • RA resources for 4-step RACH with Msg1 repetition and without Msg3 repetition may be selected from pool #3.
  • RA resources for 4-step RACH with Msg1 repeat and Msg3 repeat may be selected from pool #4.
  • a UE reporting Msg1 repetition capability may be defined as having Msg3 repetition capability.
  • the type of RACH resource may be at least one of the following types. - One or more sets of RACH resources for RACH procedures without Msg1 or Msg3 repetitions. - One or more sets of RACH resources for RACH procedures with Msg3 repetitions and without Msg1 repetitions. - One or more sets of RACH resources for RACH procedures with both Msg1 and Msg3 repetitions.
  • the number of Msg1/Msg3 repetitions may be different between multiple sets of RACH resources for RACH procedures with Msg1/Msg3 repetitions.
  • UE behavior may be based on certain conditions.
  • the condition may be an RSRP condition of SSB.
  • Each UE operation may correspond to a range of SSB RSRP.
  • the condition may be at least one of SSB RSRP being equal to or greater than threshold 1 and lower than threshold 2.
  • Threshold 1 may be rsrp-Threshold-NoRep.
  • the condition may be at least one of the following: the SSB RSRP is equal to or greater than the threshold value 3, or lower than the threshold value 4.
  • Threshold 3 may be rsrp-Threshold-NoRep.
  • Threshold 4 may be rsrp-ThresholdMsg3.
  • the condition may be at least one of SSB RSRP being equal to or greater than the threshold value 5 and lower than the threshold value 6.
  • Threshold 6 may be rsrp-ThresholdMsg1.
  • the threshold values 1/2/3/4/5/6 may be defined in the specifications or may be instructed by the base station via the PBCH/SIB1 PDSCH/RRC IE.
  • a UE that supports Msg1 repetition and Msg3 repetition may apply 2-step RACH if RSRP is greater than or equal to rsrp-ThresholdMsgA. If RSRP is lower than rsrp-ThresholdMsgA and greater than or equal to threshold rsrp-ThresholdMsg3, the UE may apply 4-step RACH without Msg1 or Msg3 repetitions. If the RSRP is lower than the threshold rsrp-ThresholdMsg3 and greater than or equal to the threshold rsrp-ThresholdMsg1, the UE may apply 4-step RACH with Msg3 repetitions and without Msg1 repetitions.
  • Embodiment #1a-4 ⁇ Some of embodiments #1a-1 to #1a-3 may be combined. Embodiment #1a-2/#1a-3 may be applied when at least one of the following application conditions is met.
  • the applicable conditions are applicable condition 1 and applicable condition 4.
  • the applicable conditions are applicable condition 2 and applicable condition 3.
  • the UE can appropriately determine the repetition of Msg1/Msg3.
  • ⁇ Embodiment #1b ⁇ There is a trade-off between the number of PRACH repetitions and the number of resources for PRACH. It is preferable for the base station to be able to control at least one of whether PRACH repetitions are performed and the maximum number of PRACH repetitions.
  • the UE may receive settings/instructions regarding information regarding whether to perform PRACH repetition.
  • the information regarding whether to perform PRACH repetition may be at least one of the following information.
  • the information indicates whether to turn on or turn off the PRACH repeat function. That information may be implied based on another setting. For example, the RO/RA resource configuration may imply whether PRACH repetition is on or off. For example, the presence or absence of a configuration regarding the RSRP threshold may imply whether PRACH repetition is turned on or off.
  • the information indicates the number of PRACH repetitions.
  • the candidate value may include at least one of ⁇ 1, 2, 4, 8, 16, 32 ⁇ .
  • a value of 1 may be equivalent to turning off PRACH repetition.
  • the information may be an RSRP threshold.
  • the RSRP threshold for determining whether to perform PRACH repetition may be defined for each entry. For example, if the RSRP threshold is a sufficiently small value (eg - ⁇ ), the UE behavior may be that no PRACH repetition occurs. For example, if the RSRP threshold is a small value, the UE behavior may be that fewer UEs perform PRACH repetitions. For example, if the RSRP threshold is a large value, the UE behavior may be that more UEs perform PRACH repetitions. For example, if the RSRP threshold is a sufficiently large value, the UE behavior may be that more UEs perform PRACH repetitions.
  • the RSRP threshold may be defined in the specification, set by RRC, or indicated via MAC CE/DCI.
  • Information regarding whether to perform PRACH repetition may be configured/instructed by at least one of the following several configuration/instruction methods.
  • Combinations of some of these settings/instruction methods may be supported.
  • the information is configured via the SIB1 PDSCH and RRC IE.
  • the bit width of the setting/instruction may differ between different setting/instruction methods. For example, 1 bit may be used in setting/instruction method 1 and 2 bits may be used in setting/instruction method 2.
  • At least configuration/instruction method 1 is supported to support PRACH repetition during initial access.
  • Setting/instructing information regarding whether to perform PRACH repetition may require that at least one of the following several requirements be met.
  • the UE can appropriately determine the repetition of Msg1/Msg3.
  • the UE may receive information regarding the first random access procedure including the repetition of Msg1. Based on the information, the UE uses a first random access resource for the first random access procedure, and uses a second random access resource different from the first random access resource to perform a second random access procedure that does not include the repetition of Msg1. May be used for access procedures.
  • ⁇ Embodiment #Xa ⁇ PRACH repetition may be performed only within specific RA resources.
  • the specific RA resource may be at least one of the following several RA resources.
  • RA resource 4 Some combinations of RA resources 1 to 3. RA resource 1+RA resource 3, or RA resource 2+RA resource 3.
  • the PRACH (Msg1) repeat may follow at least one of several PRACH repeat definitions: [PRACH Repetition Definition 1] Multiple PRACH transmissions with the same beam. [PRACH Repetition Definition 2] Multiple PRACH transmissions with different beams. [PRACH Repetition Definition 3] Multiple PRACH transmissions (with the same beam or different beams) before expiration of the RAR window. [PRACH Repetition Definition 4] Multiple PRACH transmissions including the first PRACH transmission. [PRACH repetition definition 5] Multiple PRACH transmissions that do not include the first PRACH transmission. In this case, the first PRACH transmission is Rel. It may be transmitted using the same RA resource as the RA resource for 15/16 PRACH transmission. Subsequent PRACH transmissions may be transmitted within the RA resources in embodiment #Xa-1.
  • the RA resource, PRACH preamble, and PRACH preamble index may be read interchangeably.
  • ⁇ Embodiment #Xa-3 ⁇ RA resources for PRACH repetition may follow at least one of several partitioning methods:
  • RA resource 1 It may be assumed that the above-mentioned RA resource 1 is applied. At least one of the following several RA resource configurations may be configured for RA resources for which at least Msg3 repeats are available: [[RA resource setting 1-1]] Number of preamble indexes available for PRACH repetition. If there is only a configuration for the number of preamble indexes, the first preamble index available for PRACH repetition may be determined for each specific rule. For example, the first preamble index may be the first preamble index configured with Msg3 repetition. All available preamble indexes configured for PRACH repetition may be accommodated in the preamble index applicable to Msg3 repetition starting from the determined preamble index.
  • the RA resources for PRACH repetition may be RA resources other than RA resources in which none of the functions of Msg3 repetition, RedCap, RAN slicing, and SDT are available.
  • RA resource 3 It may be assumed that the above-mentioned RA resource 3 is applied. At least one of the following several RA resource configurations may be configured for RA resources for which at least Msg3 repeats are available: [[RA Resource Settings 3-1]] First preamble index available for PRACH repetition. [[RA resource setting 3-2]] Number of preamble indexes available for PRACH repetition.
  • ⁇ Embodiment #Xb ⁇ PRACH repetition may be performed only within a specific RACH occasion (RO).
  • the specific RO may be at least one of the following several ROs.
  • a PRACH repetition may follow at least one of several PRACH repetition definitions: [PRACH Repetition Definition 1] Multiple PRACH transmissions with the same beam. [PRACH Repetition Definition 2] Multiple PRACH transmissions with different beams. [PRACH Repetition Definition 3] Multiple PRACH transmissions (with the same beam or different beams) before expiration of the RAR window. [PRACH Repetition Definition 4] Multiple PRACH transmissions including the first PRACH transmission. [PRACH repetition definition 5] Multiple PRACH transmissions that do not include the first PRACH transmission. In this case, the first PRACH transmission is Rel. It may be transmitted using the same RA resource as the RA resource for 15/16 PRACH transmission. Subsequent PRACH transmissions may be transmitted within the RO in embodiment #Xb-1.
  • the RO for PRACH repetition may follow at least one of several partitioning methods:
  • the mask index constraints/extensions may be subject to at least one of the following several constraints/extensions.
  • the available PRACH mask index entries may be expanded based on at least one of several expansion methods below.
  • [Extension method 1] Add an entry for PRACH occasion index X.
  • X may be an integer greater than 8.
  • Extension method 2 Adding entries for the first/second/third/.../Xth PRACH occasion in the X PRACH occasions.
  • X may be an integer greater than 2.
  • X may be 3, 4, or 5.
  • bit width for PRACH mask index configuration may be expanded to cover more than 16 entries.
  • the UE can appropriately determine RACH resources for PRACH repetition.
  • the UE may receive information regarding a random access procedure including multiple repetitions of Msg1 and multiple repetitions of Msg3.
  • the UE may determine one or more second beams to be used for the plurality of repetitions of the Msg3 based on the one or more first beams to be used for the plurality of repetitions of the Msg1 based on the information. good.
  • the transmission beam of the Msg3 repetition may depend on at least one beam of the Msg1 repetition and the detected RAR.
  • the transmission beam for Msg3 repetition may be any of the following several transmission beams.
  • the same beam for all Msg3 repetitions may be determined by the beam of Msg1 repetition.
  • the beam for Msg3 repetitions may be the same as the beam for Msg1 repetitions ( Figure 11).
  • the beam of Msg3 repetition may follow the beam of the first/last/random Msg1 repetition. In the example of FIG. 12, the four repetitions of Msg3 use the beam used in the first repetition of the four repetitions of Msg1.
  • the same beam for all Msg3 repetitions may be determined by the detected RAR.
  • the beam may be determined by explicit instructions within the RAR. One field within the RAR may direct the beam for Msg3 repetitions. It may be specified that the UE assumes that its indicated beam is obtained from Msg1 repeat beams. In the example of FIG. 13, the RAR indicates the beam used for four repetitions of Msg3. That beam is the one used in one of the four iterations of Msg1.
  • the beam may be determined by an implicit indication such as RA-RNTI. For example, the beam may be determined by the RO corresponding to the RA-RNTI used for the detected RAR.
  • the beams of multiple Msg3 repetitions may be determined by the beams of Msg1 repetitions. If the Msg1 repeats use different beams, the Msg3 repeat beams may follow the Msg1 repeat beams. - Example: If the number of Msg1 repeats is equal to the number of Msg3 repeats, the mapping between the beams of Msg1 repeats and the beams of Msg3 repeats may be a one-to-one mapping. In the example of FIG. 14, the four beams used for the four repetitions of Msg3 are the four beams used for the four repetitions of Msg1.
  • the mapping of multiple Msg1 repeat beams and multiple Msg3 repeat beams may be sequential mapping or cyclic mapping.
  • the two beams used for the two repetitions of Msg1 are cyclically applied to the four beams used for the four repetitions of Msg3 (cyclic mapping).
  • each beam used in the two repetitions of Msg1 is applied twice in succession to the four beams used in the four repetitions of Msg3 (sequential mapping).
  • the beam of N Msg3 repeats may be a beam of N Msg1 repeats from the beginning/from the end/randomly.
  • the two beams used for the two repetitions of Msg3 are the two beams used for the first two of the four repetitions of Msg1.
  • the beam of multiple Msg3 repetitions may be determined by the detected RAR.
  • the beam may be determined by explicit instructions within the RAR. It may be specified that the UE assumes that its indicated beam is obtained from Msg1 repeat beams.
  • the beam of multiple repetitions for Msg3 may depend on at least one of the beams of the corresponding Msg1 repetition, the corresponding RAR, and all Msg1 repetitions.
  • the UE may follow at least one of the following several actions. - The UE does not assume different repetition numbers for multiple Msg3PUSCHs. - The UE does not assume that the total number of repetitions for multiple Msg3PUSCHs exceeds a certain value. - The UE does not assume that any previous repetition of Msg3PUSCH will collide with any subsequent repetition of Msg3PUSCH. - The UE does not assume that any previous Msg3PUSCH repetition starts/ends later than any subsequent Msg3PUSCH repetition.
  • the transmission beam for Msg3 repetition may be any of the following several transmission beams.
  • the beam of Msg3 repetition may be the same as transmit beam 2-1A.
  • the beam of Msg3 repetition may follow the beam of the first/last/random Msg1 repetition.
  • Transmission beam 2-2 A different beam may be used for every Msg3 repetition.
  • the beams of multiple Msg3 repetitions may be determined by the beams of all Msg1 repetitions. If the Msg1 repeats use different beams, the Msg3 repeat beams may follow the Msg1 repeat beams. - Example: If the number of Msg1 repeats is equal to the number of Msg3 repeats, the mapping between the beams of Msg1 repeats and the beams of Msg3 repeats may be a one-to-one mapping. - Example: If the number of Msg1 repeats is less than the number of Msg3 repeats, the mapping of multiple Msg1 repeat beams and multiple Msg3 repeat beams may be sequential mapping or cyclic mapping.
  • the two beams used for the two repetitions of Msg1 are cyclically applied to the four beams used for the four repetitions of Msg3 (cyclic mapping).
  • each beam used in the two repetitions of Msg1 is applied twice in succession to the four beams used in the four repetitions of Msg3 (sequential mapping).
  • the beam of N Msg3 repeats may be a beam of N Msg1 repeats from the beginning/from the end/randomly.
  • the beams of multiple Msg3 repetitions may be determined by the corresponding RAR.
  • the beam may be determined by explicit instructions within the RAR.
  • One field within the RAR may direct one or more beams for Msg3 repetitions. It may be specified that the UE assumes that its indicated beam is obtained from Msg1 repeat beams.
  • the UE when performing Msg1 repetition and Msg3 repetition, the UE can appropriately determine the beam for Msg3 repetition.
  • the UE may receive instruction information regarding the number of repetitions of Msg3.
  • the UE may determine the number of repetitions of Msg3 based on the instruction information and information regarding the repetition of Msg1 within a random access procedure including the repetition of Msg3.
  • the interpretation of the number of Msg3 repeats indicated by RAR is Rel. You may follow the 17 rules. That is, two bits from the MCS field may be reused for its interpretation based on the four candidate values. In the example of FIG. 22A, two bits from the MCS field indicate one value out of four candidate values for the number of Msg3 repeats.
  • At least one of the number of bits of the indication and the candidate value for the number of Msg3 repetitions indicated by the RAR is Rel. It may be different from the 17 rules.
  • X bits from the MCS field may be used to indicate one value from up to 2X candidate values for the number of Msg3 repeats. X may be equal to 2, less than 2, or more than 2. Up to 2X candidate values may be defined in the specification or configured by the PBCH/SIB1 PDSCH/RRC IE. Candidate values do not have to exceed upper limits such as 4/8/16/32/64.
  • two bits from the MCS field indicate one value out of four candidate values for the number of Msg3 repeats.
  • one bit from the MCS field indicates one value from two candidate values for the number of Msg3 repeats.
  • the value/range of the required number of Msg3 repeats is Rel.
  • the value may be greater than 17. Therefore, for the case with Msg1 repetition, the value defined/set for the number of Msg3 repetitions may be different from the value for the case without Msg1 repetition.
  • At least one of the number of bits of the indication and the candidate value for the number of Msg3 repeats is RAR for only one Msg1 repeat for multiple Msg1 repeats. may be different between the case where RARs are sent (case 1) and the case where multiple RARs are sent for multiple Msg1 repetitions (case 2).
  • RAR For example, if only one RAR is sent for multiple Msg1 repetitions (case 1), then It may be used for instructions.
  • X may be equal to 2, less than 2, or more than 2.
  • Up to 2X candidate values may be defined in the specification or configured by the PBCH/SIB1 PDSCH/RRC IE. Up to 2X candidate values are Rel. It may be the same as the candidate value set for a UE that supports 17 Msg3 repetitions. Candidate values do not have to exceed upper limits such as 4/8/16/32/64.
  • a new field of X bits in the RAR may be used to indicate one value from up to 2X candidate values for the number of Msg3 repeats.
  • the Y bits from the MCS field are 2 times the number of Msg3 repetitions, indicating one value from up to Y candidate values. May be used for. Y may be equal to 2, less than 2, or more than 2.
  • Up to 2 Y candidate values may be defined in the specification or configured by the PBCH/SIB1 PDSCH/RRC IE.
  • Up to 2X candidate values are Rel. It may be the same as the candidate value set for a UE that supports 17 Msg3 repetitions. Candidate values do not have to exceed upper limits such as 4/8/16/32/64.
  • a new field of Y bits in the RAR may be used to indicate one value from up to 2 Y candidate values for the number of Msg3 repeats.
  • Two bits from the MCS field in the first RAR may be used to indicate one value from up to four candidate values for the number of Msg3 repeats (similar to Rel.17).
  • a new field of Y bits in the second and subsequent RARs may be used to indicate one value from up to 2 Y candidate values for the number of Msg3 repeats.
  • the interpretation of the number of Msg3 repetitions indicated by the RAR may depend on the number of Msg1 repetitions within the current RACH procedure. For example, if the base station can know the number of Msg1 repetitions, the RACH resource pool may be associated with the number of Msg1 repetitions, or there is only one number of repetitions for Msg1. It may be a case.
  • At least one of the number of indication bits and the candidate value for the number of Msg3 repetitions is different between cases of different numbers of Msg1 repetitions. Good too.
  • X bits from the MCS field may be used to indicate one value from up to 2X candidate values for the number of Msg3 repetitions.
  • X may be equal to 2, less than 2, or more than 2.
  • Up to 2X candidate values may be defined in the specification or configured by the PBCH/SIB1 PDSCH/RRC IE.
  • Up to 2X candidate values are Rel. It may be the same as the candidate value set for a UE that supports 17 Msg3 repetitions. Candidate values do not have to exceed upper limits such as 4/8/16/32/64.
  • a new field of X bits in the RAR may be used to indicate one value from up to 2X candidate values for the number of Msg3 repeats.
  • Two bits from the MCS field in the first RAR may be used to indicate one value from up to four candidate values for the number of Msg3 repeats (similar to Rel.17).
  • a new field of X bits in the second and subsequent RARs may be used to indicate one value from up to 2X candidate values for the number of Msg3 repeats.
  • Y bits from the MCS field may be used to indicate one value from up to 2 Y candidate values for the number of Msg3 repetitions.
  • Y may be equal to 2, less than 2, or more than 2.
  • Up to 2 Y candidate values may be defined in the specification or configured by the PBCH/SIB1 PDSCH/RRC IE.
  • Up to 2X candidate values are Rel. It may be the same as the candidate value set for a UE that supports 17 Msg3 repetitions. Candidate values do not have to exceed upper limits such as 4/8/16/32/64.
  • a new field of Y bits in the RAR may be used to indicate one value from up to 2 Y candidate values for the number of Msg3 repeats.
  • Two bits from the MCS field in the first RAR may be used to indicate one value from up to four candidate values for the number of Msg3 repeats (similar to Rel.17).
  • a new field of Y bits in the second and subsequent RARs may be used to indicate one value from up to 2 Y candidate values for the number of Msg3 repeats.
  • At least one of the number of bits of the indication and the candidate value for the number of Msg3 repetitions is the case where multiple Msg1 repetitions use the same beam;
  • the Msg1 repetitions may differ between cases using different beams.
  • X bits from the MCS field may be used to indicate one value from up to 2X candidate values for the number of Msg3 repetitions.
  • X may be equal to 2, less than 2, or more than 2.
  • Up to 2X candidate values may be defined in the specification or configured by the PBCH/SIB1 PDSCH/RRC IE.
  • Up to 2X candidate values are Rel. It may be the same as the candidate value set for a UE that supports 17 Msg3 repetitions. Candidate values do not have to exceed upper limits such as 4/8/16/32/64.
  • a new field of X bits in the RAR may be used to indicate one value from up to 2X candidate values for the number of Msg3 repeats.
  • Two bits from the MCS field in the first RAR may be used to indicate one value from up to four candidate values for the number of Msg3 repeats (similar to Rel.17).
  • a new field of X bits in the second and subsequent RARs may be used to indicate one value from up to 2X candidate values for the number of Msg3 repeats.
  • Y bits from the MCS field may be used to indicate one value from up to 2 Y candidate values for the number of Msg3 repetitions.
  • Y may be equal to 2, less than 2, or more than 2.
  • Up to 2 Y candidate values may be defined in the specification or configured by the PBCH/SIB1 PDSCH/RRC IE.
  • Up to 2X candidate values are Rel. It may be the same as the candidate value set for a UE that supports 17 Msg3 repetitions. Candidate values do not have to exceed upper limits such as 4/8/16/32/64.
  • a new field of Y bits in the RAR may be used to indicate one value from up to 2 Y candidate values for the number of Msg3 repeats.
  • Two bits from the MCS field in the first RAR may be used to indicate one value from up to four candidate values for the number of Msg3 repeats (similar to Rel.17).
  • a new field of Y bits in the second and subsequent RARs may be used to indicate one value from up to 2 Y candidate values for the number of Msg3 repeats.
  • ⁇ Embodiment #3-5 Interpretation of the number of Msg3 repeats indicated by RAR may depend on some combination of embodiments #3-2, #3-3, #3-4. - For example, the interpretation may depend on the combination of embodiments #3-2 and #3-3. - For example, the interpretation may depend on the combination of embodiments #3-2 and #3-4. - For example, the interpretation may depend on the combination of embodiments #3-3 and #3-4. - For example, the interpretation may depend on the combination of embodiments #3-2, #3-3, and #3-4.
  • the UE can appropriately determine the number of repetitions of Msg3.
  • ⁇ Supplement> The operations of at least one of the embodiments described above may apply only to UEs that have reported or support a particular UE capability.
  • the particular UE capability may indicate at least one of the following: - Supporting specific processing/operation/control/information for at least one of the above embodiments. - Support simultaneous Msg1 repetition and Msg3 repetition (combination/joint operation of Msg1 repetition and Msg3 repetition). - Support both Msg1 and Msg3 repetitions within one RACH procedure in the case where one RAR for multiple Msg1 repetitions is sent (case 1). - Supporting both Msg1 and Msg3 repetitions within one RACH procedure in the case where multiple RARs for multiple Msg1 repetitions are sent (Case 2).
  • the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (for example, cell, band, BWP). , capability for each frequency range (for example, Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or for each subcarrier spacing (SCS). It may be the ability of
  • the above-mentioned specific UE capability may be a capability that is applied across all duplex schemes (commonly regardless of the duplex scheme), or may be a capability that is applied across all duplex schemes (for example, Time Division Duplex).
  • the capability may be for each frequency division duplex (TDD)) or frequency division duplex (FDD)).
  • the UE is configured with specific information related to the above-described embodiments by upper layer signaling.
  • the specific information may be information indicating enabling at least one operation of the embodiments described above, any RRC parameters for a specific release (eg, Rel. 18), and the like.
  • the UE does not support at least one operation of the specific UE capabilities or is not configured with the specific information, for example, Rel. 15/16/17 operations may be applied.
  • a transmitter that transmits first capability information regarding the ability to repeat message 1 and second capability information regarding the ability to repeat message 3; Based on the first capability information and the second capability information, a first random access procedure including repeating the message 1 and repeating the message 3 is performed, or at least repeating the message 1 and repeating the message 3.
  • a control unit that determines whether to perform a second random access procedure that does not include one.
  • the information includes at least one of a number of preamble indexes for the first random access resource and a first preamble index for the first random access resource.
  • Supplementary Note 1 wherein the control unit uses a first random access channel occasion for the first random access procedure, and uses a second random access channel occasion different from the first random access channel occasion for the second random access procedure. Or the terminal described in Appendix 2.
  • the control unit determines a first random access channel occasion for the first random access procedure based on at least one of a mask index and a second random access channel occasion for the second random access procedure.
  • the terminal according to any one of Supplementary Notes 1 to 3 to be determined.
  • a terminal comprising: a control unit that determines the number of repetitions of the message 3 based on the instruction information and information regarding the repetition of the message 1 in a random access procedure including the repetition of the message 3.
  • the terminal according to supplementary note 1 wherein the information relates to the number of repetitions of the message 1.
  • wireless communication system The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below.
  • communication is performed using any one or a combination of the wireless communication methods according to the above-described embodiments of the present disclosure.
  • FIG. 23 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment.
  • the wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP). .
  • LTE Long Term Evolution
  • 5G NR 5th generation mobile communication system New Radio
  • 3GPP Third Generation Partnership Project
  • the wireless communication system 1 may support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
  • MR-DC has dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)).
  • RATs Radio Access Technologies
  • MR-DC has dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)).
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • EN-DC E-UTRA-NR Dual Connectivity
  • NE-DC NR-E -UTRA Dual Connectivity
  • the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)).
  • the NR base station (gNB) is the MN
  • the LTE (E-UTRA) base station (eNB) is the SN.
  • the wireless communication system 1 has dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC) where both the MN and SN are NR base stations (gNB)). )) may be supported.
  • dual connectivity NR-NR Dual Connectivity (NN-DC) where both the MN and SN are NR base stations (gNB)).
  • the wireless communication system 1 includes a base station 11 that forms a macro cell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are located within the macro cell C1 and form a small cell C2 that is narrower than the macro cell C1. You may prepare.
  • User terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when base stations 11 and 12 are not distinguished, they will be collectively referred to as base station 10.
  • the user terminal 20 may be connected to at least one of the plurality of base stations 10.
  • the user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).
  • CA carrier aggregation
  • CC component carriers
  • DC dual connectivity
  • Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)).
  • Macro cell C1 may be included in FR1
  • small cell C2 may be included in FR2.
  • FR1 may be a frequency band below 6 GHz (sub-6 GHz)
  • FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and FR1 may correspond to a higher frequency band than FR2, for example.
  • the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.
  • TDD time division duplex
  • FDD frequency division duplex
  • the plurality of base stations 10 may be connected by wire (for example, optical fiber, X2 interface, etc. compliant with Common Public Radio Interface (CPRI)) or wirelessly (for example, NR communication).
  • wire for example, optical fiber, X2 interface, etc. compliant with Common Public Radio Interface (CPRI)
  • NR communication for example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which is an upper station, is an Integrated Access Backhaul (IAB) donor, and base station 12, which is a relay station, is an IAB donor. May also be called a node.
  • IAB Integrated Access Backhaul
  • the base station 10 may be connected to the core network 30 via another base station 10 or directly.
  • the core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and the like.
  • EPC Evolved Packet Core
  • 5GCN 5G Core Network
  • NGC Next Generation Core
  • the user terminal 20 may be a terminal compatible with at least one of communication systems such as LTE, LTE-A, and 5G.
  • an orthogonal frequency division multiplexing (OFDM)-based wireless access method may be used.
  • OFDM orthogonal frequency division multiplexing
  • CP-OFDM Cyclic Prefix OFDM
  • DFT-s-OFDM Discrete Fourier Transform Spread OFDM
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • a wireless access method may also be called a waveform.
  • other wireless access methods for example, other single carrier transmission methods, other multicarrier transmission methods
  • the UL and DL radio access methods may be used as the UL and DL radio access methods.
  • the downlink channels include a physical downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (physical broadcast channel (PBCH)), and a downlink control channel (physical downlink control). Channel (PDCCH)) or the like may be used.
  • PDSCH physical downlink shared channel
  • PBCH physical broadcast channel
  • PDCCH downlink control channel
  • uplink channels include a physical uplink shared channel (PUSCH) shared by each user terminal 20, an uplink control channel (PUCCH), and a random access channel. (Physical Random Access Channel (PRACH)) or the like may be used.
  • PUSCH physical uplink shared channel
  • PUCCH uplink control channel
  • PRACH Physical Random Access Channel
  • User data, upper layer control information, System Information Block (SIB), etc. are transmitted by the PDSCH.
  • User data, upper layer control information, etc. may be transmitted by PUSCH.
  • a Master Information Block (MIB) may be transmitted via the PBCH.
  • Lower layer control information may be transmitted by PDCCH.
  • the lower layer control information may include, for example, downlink control information (DCI) that includes scheduling information for at least one of PDSCH and PUSCH.
  • DCI downlink control information
  • DCI that schedules PDSCH may be called DL assignment, DL DCI, etc.
  • DCI that schedules PUSCH may be called UL grant, UL DCI, etc.
  • PDSCH may be replaced with DL data
  • PUSCH may be replaced with UL data.
  • a control resource set (CONtrol REsource SET (CORESET)) and a search space may be used to detect the PDCCH.
  • CORESET corresponds to a resource for searching DCI.
  • the search space corresponds to a search area and a search method for PDCCH candidates (PDCCH candidates).
  • PDCCH candidates PDCCH candidates
  • One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.
  • One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
  • One or more search spaces may be referred to as a search space set. Note that “search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. in the present disclosure may be read interchangeably.
  • the PUCCH allows channel state information (CSI), delivery confirmation information (for example, may be called Hybrid Automatic Repeat Request ACKnowledgement (HARQ-ACK), ACK/NACK, etc.), and scheduling request ( Uplink Control Information (UCI) including at least one of SR)) may be transmitted.
  • CSI channel state information
  • delivery confirmation information for example, may be called Hybrid Automatic Repeat Request ACKnowledgement (HARQ-ACK), ACK/NACK, etc.
  • UCI Uplink Control Information including at least one of SR
  • a random access preamble for establishing a connection with a cell may be transmitted by PRACH.
  • downlinks, uplinks, etc. may be expressed without adding "link”.
  • various channels may be expressed without adding "Physical” at the beginning.
  • a synchronization signal (SS), a downlink reference signal (DL-RS), and the like may be transmitted.
  • the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), and a demodulation reference signal (DeModulation).
  • Reference Signal (DMRS)), Positioning Reference Signal (PRS), Phase Tracking Reference Signal (PTRS), etc. may be transmitted.
  • the synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).
  • a signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS/PBCH block, SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.
  • DMRS Downlink Reference Signal
  • UL-RS uplink reference signals
  • SRS Sounding Reference Signal
  • DMRS demodulation reference signals
  • UE-specific reference signal user terminal-specific reference signal
  • FIG. 24 is a diagram illustrating an example of the configuration of a base station according to an embodiment.
  • the base station 10 includes a control section 110, a transmitting/receiving section 120, a transmitting/receiving antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140 may be provided.
  • this example mainly shows functional blocks that are characteristic of the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
  • the control unit 110 controls the entire base station 10.
  • the control unit 110 can be configured from a controller, a control circuit, etc., which will be explained based on common recognition in the technical field related to the present disclosure.
  • the control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), and the like.
  • the control unit 110 may control transmission and reception, measurement, etc. using the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140.
  • the control unit 110 may generate data, control information, a sequence, etc. to be transmitted as a signal, and may transfer the generated data to the transmitting/receiving unit 120.
  • the control unit 110 may perform communication channel call processing (setting, release, etc.), status management of the base station 10, radio resource management, and the like.
  • the transmitting/receiving section 120 may include a baseband section 121, a radio frequency (RF) section 122, and a measuring section 123.
  • the baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212.
  • the transmitter/receiver unit 120 includes a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter/receiver circuit, etc., which are explained based on common understanding in the technical field related to the present disclosure. be able to.
  • the transmitting/receiving section 120 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section.
  • the transmitting section may include a transmitting processing section 1211 and an RF section 122.
  • the reception section may include a reception processing section 1212, an RF section 122, and a measurement section 123.
  • the transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
  • the transmitting/receiving unit 120 may form at least one of a transmitting beam and a receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.
  • digital beamforming e.g., precoding
  • analog beamforming e.g., phase rotation
  • the transmitting/receiving unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • HARQ retransmission control for example, HARQ retransmission control
  • the transmitting/receiving unit 120 performs channel encoding (which may include error correction encoding), modulation, mapping, filter processing, and discrete Fourier transform (DFT) on the bit string to be transmitted.
  • a baseband signal may be output by performing transmission processing such as processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion.
  • IFFT Inverse Fast Fourier Transform
  • the transmitting/receiving unit 120 may perform modulation, filter processing, amplification, etc. on the baseband signal in a radio frequency band, and may transmit the signal in the radio frequency band via the transmitting/receiving antenna 130. .
  • the transmitting/receiving section 120 may perform amplification, filter processing, demodulation into a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 130.
  • the transmitting/receiving unit 120 (reception processing unit 1212) performs analog-to-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) processing (if necessary), applying reception processing such as filter processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing, User data etc. may also be acquired.
  • FFT fast Fourier transform
  • IDFT inverse discrete Fourier transform
  • the transmitting/receiving unit 120 may perform measurements regarding the received signal.
  • the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal.
  • the measurement unit 123 is the receiving power (for example, Reference Signal Received Power (RSRP)), Receive Quality (eg, Reference Signal Received Quality (RSRQ), Signal To InterfERENCE PLUS NOI. SE RATIO (SINR), Signal to Noise Ratio (SNR) , signal strength (for example, Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), etc. may be measured.
  • the measurement results may be output to the control unit 110.
  • the transmission path interface 140 transmits and receives signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and transmits and receives user data (user plane data) for the user terminal 20, control plane It is also possible to acquire and transmit data.
  • the transmitting unit and receiving unit of the base station 10 in the present disclosure may be configured by at least one of the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140.
  • the transmitting/receiving unit 120 may receive first ability information regarding the ability to repeat message 1 and second ability information regarding the ability to repeat message 3.
  • the control unit 110 performs a first random access procedure including repeating the message 1 and repeating the message 3 based on the first capability information and the second capability information, or performs a first random access procedure including repeating the message 1 and repeating the message 3. It may be determined whether to perform a second random access procedure that does not include at least one of the repetitions of 3.
  • the transmitting/receiving unit 120 may transmit information regarding the first random access procedure including repeating message 1. Based on the information, the control unit 110 uses a first random access resource for the first random access procedure, and uses a second random access resource different from the first random access resource that does not include repetition of the message 1. It may also be used in the second random access procedure.
  • the transmitting/receiving unit 120 may transmit information regarding a random access procedure including multiple repetitions of message 1 and multiple repetitions of message 3. Based on the information, the control unit 110 controls one or more second beams used for the plurality of repetitions of the message 3 based on the one or more first beams used for the plurality of repetitions of the message 1. You may decide.
  • the transmitting/receiving unit 120 may transmit instruction information regarding the number of repetitions of message 3.
  • the control unit 110 may determine the number of repetitions of the message 3 based on the instruction information and information regarding the repetition of the message 1 in the random access procedure including the repetition of the message 3.
  • FIG. 25 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment.
  • the user terminal 20 includes a control section 210, a transmitting/receiving section 220, and a transmitting/receiving antenna 230. Note that one or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.
  • this example mainly shows functional blocks that are characteristic of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
  • the control unit 210 controls the entire user terminal 20.
  • the control unit 210 can be configured from a controller, a control circuit, etc., which will be explained based on common recognition in the technical field related to the present disclosure.
  • the control unit 210 may control signal generation, mapping, etc.
  • the control unit 210 may control transmission and reception using the transmitting/receiving unit 220 and the transmitting/receiving antenna 230, measurement, and the like.
  • the control unit 210 may generate data, control information, sequences, etc. to be transmitted as a signal, and may transfer the generated data to the transmitting/receiving unit 220.
  • the transmitting/receiving section 220 may include a baseband section 221, an RF section 222, and a measuring section 223.
  • the baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212.
  • the transmitting/receiving unit 220 can be configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field related to the present disclosure.
  • the transmitting/receiving section 220 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section.
  • the transmitting section may include a transmitting processing section 2211 and an RF section 222.
  • the reception section may include a reception processing section 2212, an RF section 222, and a measurement section 223.
  • the transmitting/receiving antenna 230 can be configured from an antenna, such as an array antenna, as described based on common recognition in the technical field related to the present disclosure.
  • the transmitter/receiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc.
  • the transmitter/receiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
  • the transmitting/receiving unit 220 may form at least one of a transmitting beam and a receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.
  • digital beamforming e.g., precoding
  • analog beamforming e.g., phase rotation
  • the transmission/reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (e.g. RLC retransmission control), MAC layer processing (e.g. , HARQ retransmission control), etc., to generate a bit string to be transmitted.
  • RLC layer processing e.g. RLC retransmission control
  • MAC layer processing e.g. , HARQ retransmission control
  • the transmitting/receiving unit 220 (transmission processing unit 2211) performs channel encoding (which may include error correction encoding), modulation, mapping, filter processing, DFT processing (as necessary), and IFFT processing on the bit string to be transmitted. , precoding, digital-to-analog conversion, etc., and output a baseband signal.
  • DFT processing may be based on the settings of transform precoding.
  • the transmitting/receiving unit 220 transmits the above processing in order to transmit the channel using the DFT-s-OFDM waveform.
  • DFT processing may be performed as the transmission processing, or if not, DFT processing may not be performed as the transmission processing.
  • the transmitting/receiving unit 220 may perform modulation, filter processing, amplification, etc. on the baseband signal in a radio frequency band, and may transmit the signal in the radio frequency band via the transmitting/receiving antenna 230. .
  • the transmitting/receiving section 220 may perform amplification, filter processing, demodulation into a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 230.
  • the transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, and decoding (error correction) on the acquired baseband signal. (which may include decoding), MAC layer processing, RLC layer processing, and PDCP layer processing may be applied to obtain user data and the like.
  • the transmitting/receiving unit 220 may perform measurements regarding the received signal.
  • the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal.
  • the measurement unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
  • the measurement results may be output to the control unit 210.
  • the transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting/receiving unit 220 and the transmitting/receiving antenna 230.
  • the transmitting/receiving unit 220 may transmit first ability information regarding the ability to repeat message 1 and second ability information regarding the ability to repeat message 3.
  • the control unit 210 performs a first random access procedure including repeating the message 1 and repeating the message 3 based on the first capability information and the second capability information, or performs a first random access procedure including repeating the message 1 and repeating the message 3. It may be determined whether to perform a second random access procedure that does not include at least one of the repetitions of 3.
  • the control unit 210 may use a first random access resource for the first random access procedure, and may use a second random access resource different from the first random access resource for the second random access procedure.
  • the control unit 210 may determine whether to perform the first random access procedure or the second random access procedure based on a comparison between the received reference signal power and a threshold value.
  • the control unit 210 may control reception of information regarding at least one of the maximum number of repetitions of the message 1 and a threshold for reference signal reception power.
  • the transmitting/receiving unit 220 may receive information regarding the first random access procedure including repeating message 1. Based on the information, the control unit 210 uses a first random access resource for the first random access procedure, and uses a second random access resource different from the first random access resource that does not include repetition of the message 1. It may also be used in the second random access procedure.
  • the information may include at least one of a number of preamble indexes for the first random access resource and a first preamble index for the first random access resource.
  • the control unit 210 may use a first random access channel occasion for the first random access procedure, and use a second random access channel occasion different from the first random access channel occasion for the second random access procedure. good.
  • the control unit 210 determines a first random access channel occasion for the first random access procedure based on at least one of a mask index and a second random access channel occasion for the second random access procedure. may be determined.
  • the transceiver unit 220 may receive information regarding a random access procedure including multiple repetitions of message 1 and multiple repetitions of message 3. Based on the information, the control unit 210 controls one or more second beams used for the plurality of repetitions of the message 3 based on the one or more first beams used for the plurality of repetitions of the message 1. You may decide.
  • the control unit 210 may determine the one or more second beams from among the one or more first beams.
  • One random access response may be sent for multiple repetitions of the message 1.
  • One random access response may be sent for each of multiple repetitions of said message 1.
  • the transmitting/receiving unit 220 may receive instruction information regarding the number of repetitions of message 3.
  • the control unit 210 may determine the number of repetitions of the message 3 based on the instruction information and information regarding the repetition of the message 1 in the random access procedure including the repetition of the message 3.
  • the information may relate to the number of repetitions of the message 1.
  • the information may relate to the number of random access responses to the message 1.
  • the information may relate to the number of beams used for repeating the message 1.
  • each functional block may be realized using one physically or logically coupled device, or may be realized using two or more physically or logically separated devices directly or indirectly (e.g. , wired, wireless, etc.) and may be realized using a plurality of these devices.
  • the functional block may be realized by combining software with the one device or the plurality of devices.
  • functions include judgment, decision, judgement, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and consideration. , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block (configuration unit) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.
  • a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 26 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment.
  • the base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc. .
  • the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured not to include some of the devices.
  • processor 1001 may be implemented using one or more chips.
  • Each function in the base station 10 and the user terminal 20 is performed by, for example, loading predetermined software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations and communicates via the communication device 1004. This is achieved by controlling at least one of reading and writing data in the memory 1002 and storage 1003.
  • predetermined software program
  • the processor 1001 operates an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) that includes interfaces with peripheral devices, a control device, an arithmetic unit, registers, and the like.
  • CPU central processing unit
  • the above-mentioned control unit 110 (210), transmitting/receiving unit 120 (220), etc. may be realized by the processor 1001.
  • the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes in accordance with these.
  • programs program codes
  • software modules software modules
  • data etc.
  • the control unit 110 may be realized by a control program stored in the memory 1002 and operated in the processor 1001, and other functional blocks may also be realized in the same way.
  • the memory 1002 is a computer-readable recording medium, and includes at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other suitable storage media. It may be composed of one. Memory 1002 may be called a register, cache, main memory, or the like.
  • the memory 1002 can store executable programs (program codes), software modules, and the like to implement a wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM), etc.), a digital versatile disk, removable disk, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. It may be configured by Storage 1003 may also be called an auxiliary storage device.
  • a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM), etc.), a digital versatile disk, removable disk, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. It may be configured by Storage 1003 may also be called an auxiliary storage device.
  • 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 a network device, network controller, network card, communication module, etc., for example.
  • 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 configured to include.
  • FDD frequency division duplex
  • TDD time division duplex
  • the transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).
  • the input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the 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 for each device.
  • the base station 10 and user terminal 20 also include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured to include hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these hardwares.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA field programmable gate array
  • channel, symbol and signal may be interchanged.
  • the signal may be a message.
  • the reference signal may also be abbreviated as RS, and may be called a pilot, pilot signal, etc. depending on the applicable standard.
  • a component carrier CC may be called a cell, a frequency carrier, a carrier frequency, or the like.
  • a radio frame may be composed of one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting a radio frame may be called a subframe.
  • a subframe may be composed of one or more slots in the time domain.
  • a 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 certain signal or channel.
  • Numerology includes, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, and radio frame configuration. , a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
  • a slot may be composed 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. Further, a slot may be a time unit based on numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • a slot may include multiple mini-slots. Each minislot may be made up of one or more symbols in the time domain. Furthermore, a mini-slot may also be called a sub-slot. A minislot may be made up of fewer symbols than a slot.
  • PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (PUSCH) mapping type A.
  • PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.
  • Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals. Other names may be used for the radio frame, subframe, slot, minislot, and symbol. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.
  • one subframe may be called a TTI
  • a plurality of consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI.
  • at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. It may be.
  • the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.
  • TTI refers to, for example, the minimum time unit for scheduling 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 of a channel-coded data packet (transport block), a code block, a codeword, etc., or may be a processing unit of scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) to which transport blocks, code blocks, code words, 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 time unit for scheduling.
  • the number of slots (minislot number) that constitutes 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 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
  • TTI TTI in 3GPP Rel. 8-12
  • normal TTI long TTI
  • normal subframe normal subframe
  • long subframe slot
  • TTI that is shorter than the normal TTI may be referred to as an abbreviated TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
  • long TTI for example, normal TTI, subframe, etc.
  • short TTI for example, short TTI, etc. It may also be read as a TTI having the above TTI length.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more continuous subcarriers (subcarriers) in the frequency domain.
  • the number of subcarriers included in an RB may be the same regardless of the numerology, and may be 12, for example.
  • the number of subcarriers included in an RB may be determined based on numerology.
  • an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI.
  • One TTI, one subframe, etc. may each be composed of one or more resource blocks.
  • one or more RBs include a physical resource block (Physical RB (PRB)), a sub-carrier group (SCG), a resource element group (REG), and a PRB/RB. It may also be called a group/set/pair.
  • PRB Physical resource block
  • SCG sub-carrier group
  • REG resource element group
  • a resource block may be configured by one or more resource elements (REs).
  • REs resource elements
  • 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • Bandwidth Part (also called partial bandwidth, etc.) refers to a subset of consecutive common resource blocks (RB) for a certain numerology in a certain carrier.
  • the common RB may be specified by an RB index based on a common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
  • BWP UL BWP
  • BWP for DL DL BWP
  • One or more BWPs may be configured within 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 of the active BWP.
  • “cell”, “carrier”, etc. in the present disclosure may be replaced with "BWP”.
  • the structures of the radio frame, subframe, slot, minislot, symbol, etc. described above are merely 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 symbols included in an RB The number of subcarriers, the number of symbols within a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
  • radio resources may be indicated by a predetermined index.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. which may be referred to throughout the above description, may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may also be represented by a combination of
  • information, signals, etc. may be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layer.
  • Information, signals, etc. may be input and output via multiple network nodes.
  • Input/output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Information, signals, etc. that are input and output can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.
  • Notification of information is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods.
  • the notification of information in this disclosure may be physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof It may be carried out by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof It may be carried out by
  • the physical layer signaling may also be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc.
  • RRC signaling may be called an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.
  • MAC signaling may be notified using, for example, a MAC Control Element (CE).
  • CE MAC Control Element
  • notification of prescribed information is not limited to explicit notification, but may be made implicitly (for example, by not notifying the prescribed information or by providing other information) (by notification).
  • the determination may be made by a value expressed by 1 bit (0 or 1), or by a boolean value expressed by true or false. , may be performed by numerical comparison (for example, comparison with a predetermined value).
  • Software includes instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name. , should be broadly construed to mean an application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.
  • software, instructions, information, etc. may be sent and received via a transmission medium.
  • a transmission medium such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
  • wired technology such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
  • wireless technology such as infrared, microwave, etc.
  • Network may refer to devices (eg, base stations) included in the network.
  • precoding "precoding weight”
  • QCL quadsi-co-location
  • TCI state "Transmission Configuration Indication state
  • space space
  • spatial relation "spatial domain filter”
  • transmission power "phase rotation”
  • antenna port "antenna port group”
  • layer "number of layers”
  • Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, and “panel” are interchangeable.
  • Base Station BS
  • Wireless base station Wireless base station
  • Fixed station NodeB
  • eNB eNodeB
  • gNB gNodeB
  • Access point "Transmission Point (TP)”, “Reception Point (RP)”, “Transmission/Reception Point (TRP)”, “Panel”
  • cell “sector,” “cell group,” “carrier,” “component carrier,” and the like
  • a base station is sometimes referred to by terms such as macrocell, small cell, femtocell, and picocell.
  • a base station can accommodate one or more (eg, three) cells. If a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is connected to a base station subsystem (e.g., an indoor small base station (Remote Radio Communication services can also be provided by the Head (RRH)).
  • a base station subsystem e.g., an indoor small base station (Remote Radio Communication services can also be provided by the Head (RRH)
  • RRH Remote Radio Communication services
  • the term “cell” or “sector” refers to part or all of the coverage area of a base station and/or base station subsystem that provides communication services in this coverage.
  • a base station transmitting information to a terminal may be interchanged with the base station instructing the terminal to control/operate based on the information.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station is 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 terminal, remote terminal. , handset, user agent, mobile client, client, or some other suitable terminology.
  • At least one of a base station and a mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc.
  • a transmitting device may be called a transmitting device, a receiving device, a wireless communication device, etc.
  • the base station and the mobile station may be a device mounted on a moving object, the moving object itself, or the like.
  • the moving body refers to a movable object, and the moving speed is arbitrary, and naturally includes cases where the moving body is stopped.
  • the mobile objects include, for example, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, and ships (ships and other watercraft). , including, but not limited to, airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, balloons, and items mounted thereon.
  • the mobile object may be a mobile object that autonomously travels based on a travel command.
  • the moving object may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving object (for example, a drone, a self-driving car, etc.), or a robot (manned or unmanned). ).
  • a vehicle for example, a car, an airplane, etc.
  • an unmanned moving object for example, a drone, a self-driving car, etc.
  • a robot manned or unmanned.
  • at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
  • at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
  • IoT Internet of Things
  • FIG. 27 is a diagram illustrating an example of a vehicle according to an embodiment.
  • the vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (current sensor 50, (including a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service section 59, and a communication module 60. Be prepared.
  • the drive unit 41 is composed of, for example, at least one of an engine, a motor, and a hybrid of an engine and a motor.
  • the steering unit 42 includes at least a steering wheel (also referred to as a steering wheel), and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.
  • the electronic control unit 49 includes a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input/output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49.
  • the electronic control section 49 may be called an electronic control unit (ECU).
  • the signals from the various sensors 50 to 58 include a current signal from the current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheel 46/rear wheel 47 obtained by the rotation speed sensor 51, and a signal obtained by the air pressure sensor 52.
  • air pressure signals of the front wheels 46/rear wheels 47 a vehicle speed signal acquired by the vehicle speed sensor 53, an acceleration signal acquired by the acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by the accelerator pedal sensor 55, and a brake pedal sensor.
  • 56 a shift lever 45 operation signal obtained by the shift lever sensor 57, and an object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc. There are signals etc.
  • the information service department 59 includes various devices such as car navigation systems, audio systems, speakers, displays, televisions, and radios that provide (output) various information such as driving information, traffic information, and entertainment information, and these devices. It consists of one or more ECUs that control the The information service unit 59 provides various information/services (for example, multimedia information/multimedia services) to the occupants of the vehicle 40 using information acquired from an external device via the communication module 60 or the like.
  • various information/services for example, multimedia information/multimedia services
  • the information service unit 59 may include an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accepts input from the outside, and an output device that performs output to the outside (for example, display, speaker, LED lamp, touch panel, etc.).
  • an input device for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
  • an output device that performs output to the outside (for example, display, speaker, LED lamp, touch panel, etc.).
  • the driving support system unit 64 includes millimeter wave radar, Light Detection and Ranging (LiDAR), a camera, a positioning locator (for example, Global Navigation Satellite System (GNSS), etc.), and map information (for example, High Definition (HD)). maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., inertial measurement units (IMUs), inertial navigation systems (INS), etc.), artificial intelligence ( Artificial Intelligence (AI) chips, AI processors, and other devices that provide functions to prevent accidents and reduce the driver's driving burden, as well as one or more devices that control these devices. It consists of an ECU. Further, the driving support system section 64 transmits and receives various information via the communication module 60, and realizes a driving support function or an automatic driving function.
  • LiDAR Light Detection and Ranging
  • GNSS Global Navigation Satellite System
  • HD High Definition
  • maps for example, autonomous vehicle (AV) maps, etc.
  • gyro systems e.g.,
  • the communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63.
  • the communication module 60 communicates via the communication port 63 with a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, which are included in the vehicle 40.
  • Data (information) is transmitted and received between the axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58.
  • the communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with external devices. For example, various information is transmitted and received with an external device via wireless communication.
  • the communication module 60 may be located either inside or outside the electronic control unit 49.
  • the external device may be, for example, the base station 10, user terminal 20, etc. described above.
  • the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (it may function as at least one of the base station 10 and the user terminal 20).
  • the communication module 60 receives signals from the various sensors 50 to 58 described above that are input to the electronic control unit 49, information obtained based on the signals, and input from the outside (user) obtained via the information service unit 59. At least one of the information based on the information may be transmitted to an external device via wireless communication.
  • the electronic control unit 49, various sensors 50-58, information service unit 59, etc. may be called an input unit that receives input.
  • the PUSCH transmitted by the communication module 60 may include information based on the above input.
  • the communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device, and displays it on the information service section 59 provided in the vehicle.
  • the information service unit 59 is an output unit that outputs information (for example, outputs information to devices such as a display and a speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 60). may be called.
  • the communication module 60 also stores various information received from external devices into a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 controls the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, and left and right rear wheels provided in the vehicle 40. 47, axle 48, various sensors 50-58, etc. may be controlled.
  • the base station in the present disclosure may be replaced by a user terminal.
  • communication between a base station and a user terminal is replaced with communication between multiple user terminals (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.
  • the user terminal 20 may have the functions that the base station 10 described above has.
  • words such as "uplink” and “downlink” may be replaced with words corresponding to inter-terminal communication (for example, "sidelink”).
  • uplink channels, downlink channels, etc. may be replaced with sidelink channels.
  • the user terminal in the present disclosure may be replaced with a base station.
  • the base station 10 may have the functions that the user terminal 20 described above has.
  • the operations performed by the base station 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, one or more network nodes other than the base station (e.g. It is clear that this can be performed by a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc. (though not limited thereto), or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • Each aspect/embodiment described in this disclosure may be used alone, in combination, or may be switched and used in accordance with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure use an example order to present elements of the various steps and are not limited to the particular order presented.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-B LTE-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • 6G 6th generation mobile communication system
  • xG x is an integer or decimal number, for example
  • Future Radio Access FAA
  • RAT New-Radio Access Technology
  • NR New Radio
  • NX New radio access
  • FX Future generation radio access
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access
  • UMB Ultra Mobile Broadband
  • IEEE 802 .11 Wi-Fi (registered trademark)
  • IEEE 802.16 WiMAX (registered trademark)
  • IEEE 802.20 Ultra-WideBand (UWB), Bluetooth (registered trademark), and other appropriate wireless communication methods.
  • the present invention may be applied to systems to be used, next-generation systems expanded, modified,
  • the phrase “based on” does not mean “based solely on” unless explicitly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to elements using the designations "first,” “second,” etc. does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not imply that only two elements may be employed or that the first element must precede the second element in any way.
  • determining may encompass a wide variety of actions. For example, “judgment” can mean judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry ( For example, searching in a table, database, or other data structure), ascertaining, etc. may be considered to be “determining.”
  • judgment (decision) includes receiving (e.g., receiving information), transmitting (e.g., sending information), input (input), output (output), access ( may be considered to be “determining”, such as accessing data in memory (eg, accessing data in memory).
  • judgment is considered to mean “judging” resolving, selecting, choosing, establishing, comparing, etc. Good too.
  • judgment (decision) may be considered to be “judgment (decision)” of some action.
  • the "maximum transmit power" described in this disclosure may mean the maximum value of transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the It may also mean rated UE maximum transmit power).
  • connection refers to any connection or coupling, direct or indirect, between two or more elements.
  • the coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connection” may be replaced with "access.”
  • microwave when two elements are connected, they may be connected using one or more electrical wires, cables, printed electrical connections, etc., as well as in the radio frequency domain, microwave can be considered to be “connected” or “coupled” to each other using electromagnetic energy having wavelengths in the light (both visible and invisible) range.
  • a and B are different may mean “A and B are different from each other.” Note that the term may also mean that "A and B are each different from C”. Terms such as “separate” and “coupled” may also be interpreted similarly to “different.”
  • the i-th (i is any integer), not only in the elementary, comparative, and superlative, but also interchangeably (for example, "the highest” can be interpreted as “the i-th highest”). may be read interchangeably).

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

Abstract

Un terminal selon un aspect de la présente divulgation comprend : une unité de transmission qui transmet des premières informations de capacité concernant une capacité pour répéter un message 1, et des secondes informations de capacité concernant une capacité pour répéter un message 3 ; et une unité de commande qui détermine, sur la base des premières informations de capacité et des secondes informations de capacité, s'il faut réaliser une première procédure d'accès aléatoire qui inclut une répétition du message 1 et une répétition du message 3, ou une seconde procédure d'accès aléatoire qui n'inclut pas la répétition du message 1 et/ou la répétition du message 3. Selon l'aspect de la présente divulgation, la couverture d'une procédure d'accès aléatoire peut être améliorée.
PCT/JP2022/026726 2022-07-05 2022-07-05 Terminal, procédé de communication sans fil et station de base WO2024009402A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017135455A1 (fr) * 2016-02-04 2017-08-10 株式会社Ｎｔｔドコモ Équipement utilisateur et procédé d'accès aléatoire

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017135455A1 (fr) * 2016-02-04 2017-08-10 株式会社Ｎｔｔドコモ Équipement utilisateur et procédé d'accès aléatoire

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Radio Resource Control (RRC) protocol specification (Release 17)", 3GPP TS 38.331, no. V17.0.0, 19 April 2022 (2022-04-19), pages 1 - 1221, XP052146036 *
HUAWEI, HISILICON: "Report of [AT118-e][103][CovEnh] RRC CR (Huawei)", 3GPP TSG RAN WG2 #118-E R2-2206193, 27 May 2022 (2022-05-27), XP052156292 *

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