WO2024171381A1 - 端末、無線通信方法及び基地局 - Google Patents

端末、無線通信方法及び基地局 Download PDF

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Publication number
WO2024171381A1
WO2024171381A1 PCT/JP2023/005512 JP2023005512W WO2024171381A1 WO 2024171381 A1 WO2024171381 A1 WO 2024171381A1 JP 2023005512 W JP2023005512 W JP 2023005512W WO 2024171381 A1 WO2024171381 A1 WO 2024171381A1
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Prior art keywords
srs
power control
information
transmission
unit
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English (en)
French (fr)
Japanese (ja)
Inventor
尚哉 芝池
祐輝 松村
聡 永田
ジン ワン
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NTT Docomo Inc
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NTT Docomo Inc
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Priority to PCT/JP2023/005512 priority Critical patent/WO2024171381A1/ja
Priority to JP2025500537A priority patent/JPWO2024171381A1/ja
Publication of WO2024171381A1 publication Critical patent/WO2024171381A1/ja
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels

Definitions

  • This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • Non-Patent Document 1 LTE-Advanced (3GPP Rel. 10-14) was specified for the purpose of achieving higher capacity and greater sophistication over LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).
  • LTE 5th generation mobile communication system
  • 5G+ 5th generation mobile communication system
  • 6G 6th generation mobile communication system
  • NR New Radio
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the Sounding Reference Signal will have a wide range of uses.
  • NR SRS will be used not only for measuring the CSI of the uplink (UL), but also for measuring the CSI of the downlink (DL) and for beam management.
  • one of the objectives of this disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately controls the power of the SRS.
  • a terminal has a receiving unit that receives a setting of a sounding reference signal (SRS) resource set for antenna switching, and a control unit that determines a power control parameter set from multiple candidates for power control parameters based on the setting, and applies the power control parameter set to a transmission using the SRS resource set.
  • SRS sounding reference signal
  • the power of the SRS can be appropriately controlled.
  • FIG. 1 shows an example of an SRS resource set configuration information element.
  • FIG. 2 shows an example of an SRS resource configuration information element.
  • FIG. 3 shows an example of parameter association for SRS.
  • FIG. 4 shows an example of a band for SRS frequency hopping.
  • FIG. 5 shows an example of SRS frequency hopping.
  • FIG. 6 shows another example of SRS frequency hopping.
  • 7 shows an example of a table showing the relationship between the number of transmission combs K TC and the maximum number of cyclic shifts of the SRS n SRS CS,max in Rel.
  • FIG. 8 shows an example of a table indicating the number of transmission combs K TC and the cyclic shift value n SRS CS,i of the SRS when the number of SRS ports N ap SRS is 2.
  • FIG. 9 shows an example of a table indicating the number of transmission combs K TC and the cyclic shift value n SRS CS,i of the SRS when the number of SRS ports N ap SRS is four.
  • 10A-10D show example power control parameters for an SRS resource set.
  • FIG. 11 shows Example 1 of embodiment #3.
  • FIG. 12 shows Example 2 of embodiment #3.
  • FIG. 13 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment.
  • FIG. 14 is a diagram illustrating an example of the configuration of a base station according to an embodiment.
  • FIG. 15 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment.
  • FIG. 16 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment.
  • FIG. 17 is a diagram illustrating an example of a vehicle according to an embodiment.
  • SRS sounding reference signal
  • NR the use of the sounding reference signal (SRS) for measurement is diverse.
  • the SRS of NR is used not only for CSI measurement of the uplink (UL) used in the existing LTE (LTE Rel. 8-14), but also for CSI measurement of the downlink (DL), beam management, etc.
  • the UE may be configured with one or more SRS resources.
  • the SRS resources may be identified by an SRS Resource Index (SRI).
  • SRI SRS Resource Index
  • Each SRS resource may have one or more SRS ports (corresponding to one or more SRS ports).
  • the number of ports per SRS may be 1, 2, 4, etc.
  • the UE may be configured with one or more SRS resource sets.
  • One SRS resource set may be associated with a predetermined number of SRS resources.
  • the UE may use common upper layer parameters for the SRS resources included in one SRS resource set. Note that the resource set in this disclosure may be interpreted as a set, a resource group, a group, etc.
  • Information regarding the SRS resource or resource set may be configured in the UE using higher layer signaling, physical layer signaling, or a combination of both.
  • the SRS configuration information element may include an SRS resource set configuration information element ( Figure 1), an SRS resource configuration information element ( Figure 2), etc.
  • the SRS resource set configuration information element may include an SRS resource set ID (Identifier) (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type (resourceType), and information on SRS usage.
  • the SRS resource type may indicate the time domain behavior of the SRS resource configuration, or may indicate any of periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), and aperiodic SRS (A(AP)-SRS).
  • P-SRS periodic SRS
  • SP-SRS semi-persistent SRS
  • A(AP)-SRS aperiodic SRS
  • the UE may transmit P-SRS and SP-SRS periodically (or periodically after activation).
  • the UE may transmit A-SRS based on an SRS request in the DCI.
  • the use of the SRS may be, for example, beam management, codebook (CB), non-codebook (NCB), antenna switching, etc.
  • the SRS for codebook or non-codebook use may be used to determine a precoder for codebook-based or non-codebook-based uplink shared channel (Physical Uplink Shared Channel (PUSCH)) transmission based on the SRI.
  • PUSCH Physical Uplink Shared Channel
  • SRS for beam management purposes may be assumed such that only one SRS resource for each SRS resource set may be transmitted at a given time instant. Note that in the same Bandwidth Part (BWP), if multiple SRS resources with the same time domain behavior belong to different SRS resource sets, these SRS resources may be transmitted simultaneously.
  • BWP Bandwidth Part
  • the SRS resource configuration information element may include an SRS resource ID (SRS-ResourceId), the number of SRS ports, the SRS port number, the number of transmission combs, SRS resource mapping (e.g., time and/or frequency resource position, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), hopping related information, SRS resource type, sequence ID, spatial relationship information, etc.
  • SRS resource ID SRS resource ID
  • SRS-ResourceId the number of SRS ports
  • SRS port number the number of transmission combs
  • SRS resource mapping e.g., time and/or frequency resource position, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.
  • hopping related information e.g., time and/or frequency resource position, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.
  • the number of transmission combs has a value of ⁇ 2,4 ⁇ .
  • the number of SRS ports (nrofSRS-Ports) N ap SRS has a value of ⁇ 1,2,4 ⁇ .
  • the antenna port number p i has a value of ⁇ 1000,1001,... ⁇ .
  • the number of consecutive OFDM symbols of SRS (nrofSymbols) N symb SRS has a value of ⁇ 1,2,4 ⁇ .
  • the setting of the number of combs to be transmitted may include a comb offset and a cyclic shift (CS index, CS number).
  • the UE may switch the Bandwidth Part (BWP) for transmitting the SRS for each slot, or may switch the antenna.
  • BWP Bandwidth Part
  • the UE may also apply at least one of intra-slot hopping and inter-slot hopping to the SRS transmission.
  • k - denotes a variable with a line over k, and may be referred to as k - bar.
  • k - 0 p_i may be based on the comb offset K - TC , where K TC is the number of transmitted combs.
  • M SC,b SRS is the number of subcarriers used for SRS transmission within the SRS bandwidth m SRS,b [RB].
  • n b is a constant.
  • SRS antenna switching In Rel. 15 NR, as described above, antenna switching (which may also be called antenna port switching) can be set as an application of SRS. SRS antenna switching may be used, for example, when downlink CSI acquisition is performed using uplink SRS in a Time Division Duplex (TDD) band.
  • TDD Time Division Duplex
  • UL SRS measurements may be used to determine the DL precoder.
  • the UE may report UE capability information (e.g., RRC parameter "supportedSRS-TxPortSwitch") indicating the supported SRS transmission port switching pattern to the network.
  • UE capability information e.g., RRC parameter "supportedSRS-TxPortSwitch”
  • This pattern may be expressed in the form of "txry”, e.g., "t1r2", “t2r4", etc., which may mean that SRS can be transmitted using x antenna ports out of a total of y antennas (which may be written as xTyR).
  • y may correspond to all or a subset of the UE's receiving antennas.
  • a 2T4R (2 transmit ports, 4 receive ports) UE may be configured with an SRS resource set for DL CSI acquisition that includes two SRS resources, each with two ports, and whose purpose is antenna switching.
  • Multi-port SRS transmission Next, the SRS transmission of the multi-port will be described.
  • the UE transmits the SRS by the multi-port, the UE performs multiplexing using the cyclic shift of the base sequence.
  • the following equation shows the cyclic shift ⁇ i at the antenna port P i .
  • Fig. 3 is a table showing the relationship between the number of transmission combs KTC and the maximum number of cyclic shifts of the SRS nSRSCS ,max in Rel. 16. It is assumed that nSRSCS ,max ⁇ ⁇ 0, 1, ..., nSRSCS , max ⁇ and NapSRS ⁇ ⁇ 1, 2, 4 ⁇ .
  • Fig. 4 is a table showing the number of transmission combs KTC and the cyclic shift value nSRSCS ,i of the SRS when the number of ports NapSRS of the SRS is 2.
  • Fig. 5 is a table showing the number of transmission combs KTC and the cyclic shift value nSRSCS ,i of the SRS when the number of ports NapSRS of the SRS is 4.
  • the following equation indicates the resource start position k 0 p_i in the frequency direction.
  • the first case A corresponds to odd-numbered ports ⁇ 1001, 1003 ⁇ when the number of sending combs is 8.
  • the third case C corresponds to the other cases.
  • nshift is set by the parameter freqDomainShift of the SRS resource configuration information element (FIG. 2).
  • k - TC is set by combOffset of the SRS resource configuration information element.
  • KTC is set by transmissionComb of the SRS resource configuration information element. In other words, in case C, the values of the RRC parameters are applied as they are.
  • Fig. 6 shows the resource start position k TC p_i in the frequency direction when the number of SRS ports N ap SRS is 2.
  • case C is used.
  • Fig. 7 shows the resource start position k 0 p_i in the frequency direction when the number of SRS ports N ap SRS is 4.
  • Figure 8 shows the SRS allocation for each port when the number of transmission combs is 4.
  • case C is used for ports #0 and #2
  • case B is used for ports #1 and #3.
  • a different cyclic shift is used for each port. Note that in Figure 8, the horizontal axis is time and the vertical axis is frequency. The same applies to other figures showing SRS allocation.
  • Figure 9 shows the SRS allocation for each port when the number of transmission combs is 2.
  • case C is used for ports #0 and #1.
  • different cyclic shifts are used for each port.
  • At least one of sequence hopping and group hopping for low-PAPR sequences may be configured by RRC.
  • a base sequence r -u ,v (n) is divided into multiple groups.
  • r - denotes a variable with an overline on r, and may be called r-bar.
  • v denotes a base sequence number within the group.
  • the definition of the base sequences r -u ,v (0),...,r -u ,v (M ZC -1) depends on the sequence length M ZC .
  • the group number u is based on the SRS sequence ID n ID SRS and the symbol number in the radio frame for the SRS resource, given by:
  • the symbol number is based on the slot number n s,f ⁇ in the radio frame, the number of symbols in the slot N symb slot, the starting symbol l 0 for that SRS resource, and the SRS symbol number l′ ⁇ ⁇ 0,1,...,N symb SRS -1 ⁇ in that SRS resource.
  • n ID SRS ⁇ ⁇ 0,1,...,1023 ⁇ is given by the higher layer parameter sequenceId in the SRS-Resource IE, or n ID SRS ⁇ ⁇ 0,1,...,65535 ⁇ is given by the higher layer parameter sequenceId in the SRS-PosResource-r16 IE.
  • groupOrSequenceHopping is equal to 'neither', then neither group hopping nor sequence hopping is used.
  • group number u and sequence number v are given by:
  • groupOrSequenceHopping is equal to 'groupHopping', then group hopping is used and sequence hopping is not used.
  • group number u and sequence number v are given by:
  • c init n ID SRS .
  • groupOrSequenceHopping is equal to 'sequenceHopping', sequence hopping is used and group hopping is not used.
  • group number u and sequence number v are given by:
  • c init n ID SRS .
  • SRS Transmission Power Control With index l of power control adjustment state (closed loop state), the transmission power of SRS in an SRS transmission occasion (also referred to as transmission period, etc.) i for active UL BWP b of carrier f of serving cell c, P SRS,b,f,c (i, q s , l) is given by the following equation based on P CMAX,f,c (i), P O_SRS,b,f,c (q s ), M SRS,b,f,c (i), ⁇ SRS,b,f,c (q s ), PL b,f,c (q d ), h b,f,c (i, l):
  • an SRS transmission opportunity i is a period during which an SRS is transmitted, and may be composed of, for example, one or more symbols, one or more slots, etc.
  • P CMAX,f,c (i) is, for example, the UE maximum output power for carrier f of serving cell c at SRS transmission opportunity i
  • P O_SRS,b,f,c (q s ) is a parameter related to the target received power provided by p0 for the active UL BWP b of carrier f of serving cell c and the SRS resource set q s (provided by SRS-ResourceSet and SRS-ResourceSetId) (e.g., a parameter related to a transmit power offset, also referred to as a transmit power offset P0 or a target received power parameter, etc.).
  • ⁇ SRS,b,f,c (q s ) is given by ⁇ (eg, alpha) for the active UL BWP b of serving cell c and carrier f with subcarrier spacing ⁇ , and the SRS resource set q s .
  • PL b,f,c (q d ) is the DL pathloss estimate [dB] (pathloss estimation [dB], pathloss compensation) calculated by the UE for the active DL BWP of serving cell c and SRS resource set q s using RS resource index q d ,
  • q d is the pathloss reference RS (pathloss reference RS, pathloss(PL)-RS, DL-RS for pathloss measurement, e.g., provided by pathlossReferenceRS) associated with SRS resource set q s
  • q d is the pathloss reference RS (pathloss reference RS, pathloss(PL)-RS, DL-RS for pathloss measurement, e.g., provided by pathlossReferenceRS) associated with SRS resource set q s
  • SS/PBCH block index e.g., ssb-Index
  • CSI-RS resource index e.g., csi-RS-Inde
  • the UE calculates PL b,f,c (q d ) using RS resources obtained from the SS/PBCH block that the UE uses to acquire the MIB.
  • pathlossReferenceRSs pathlossReferenceRSs
  • h b,f,c (i,l) is the SRS power control adjustment state for the active UL BWP of carrier f of serving cell c at SRS transmission opportunity i.
  • the SRS power control adjustment state configuration e.g., srs-PowerControlAdjustmentStates
  • the SRS power control adjustment state configuration indicates the same power control adjustment state for SRS and PUSCH transmissions
  • the SRS power control adjustment state h b,f,c (i) may be based on ⁇ SRS,b,f,c (m).
  • h b,f,c (i) may be based on the accumulated value of ⁇ SRS,b,f,c (m).
  • h b,f,c (i) may be ⁇ SRS,b,f,c (i) (absolute value).
  • i 0 may be the smallest positive integer such that K SRS (i ⁇ i 0 ) ⁇ 1 symbols prior to SRS transmission opportunity i ⁇ i 0 occurs earlier than K SRS (i) symbols prior to SRS transmission opportunity i.
  • K SRS (i) may be the number of symbols in the active UL BWP b of carrier f of serving cell c after the last symbol of the corresponding PDCCH that triggers the SRS transmission and before the first symbol of the SRS transmission. If the SRS transmission is semi-persistent or periodic, K SRS (i) may be the number of K SRS, min symbols in the active UL BWP b of carrier f of serving cell c that is equal to the product of the number of symbols per slot, N symb slot , and the minimum of the value provided by k2 in the PUSCH-ConfigCommon.
  • JT joint transmission
  • TRPs multiple points
  • Rel. 17 supports non-coherent joint transmission (NCJT) from two TRPs.
  • the PDSCHs from the two TRPs may be precoded and decoded independently.
  • the frequency resources may be non-overlapping, partially overlapping, or fully overlapping. In case of overlap, the PDSCH from one TRP will interfere with the PDSCH from the other TRP.
  • CJT coherent joint transmission
  • Data from the four TRPs may be coherently precoded and transmitted to the UE on the same time-frequency resource.
  • the same precoding matrix may be used considering the channels from the four TRPs.
  • Coherent may mean that there is a certain relationship between the phases of the multiple received signals.
  • 4-TRP joint precoding the signal quality may be improved and there may be no interference between the four TRPs. Data may only experience interference outside the four TRPs.
  • Extending SRS for CJT is a transmission from coherent multiple TRPs on different MIMO layers on the same time and frequency resources.
  • the SRS configured by one TRP may be received by coherent multiple TRPs simultaneously.
  • the base station For support of multi-TRP (MTRP) CJT up to 4 TRPs, the base station needs to obtain DL CJT CSI from 4 TRPs.
  • the base station can estimate DL CSI via UL SRS measurements that take into account UL-DL channel reciprocity.
  • multiple TRPs may be able to measure SRS from CJT UEs (cell edge UEs).
  • the base station may beamform DL-RS for DL CSI based on SRS measurements.
  • An SRS can be a strong interference source for some coherent TRPs. Therefore, more sophisticated power control for SRS is required.
  • SRS improvements are being considered for managing inter-TRP cross-SRS interference for TDD CJT by increasing SRS capacity and/or by randomizing interference.
  • At least one of the per-TRP power control and the power control of one or more SRS transmission occasions directed to multiple TRPs may follow one of several options:
  • M power control processes are used for M (M ⁇ 1) SRS resource sets.
  • M power control processes is based on a different UL power control parameter set associated with a different DL PL-RS.
  • the UL power control parameter set includes P0, ⁇ , and closed loop (CL) state.
  • Each of the M SRS resource sets corresponds to one of the M TRPs.
  • M is a maximum of 2 in existing specifications.
  • one set of one P0, one CL state, one ⁇ , and one PL-RS may be applied to one SRS resource set.
  • Option 0 implies an association between a power control process and an SRS resource set, i.e., the selection of one SRS resource set implies the selection of one power control process.
  • the same power control process is used for all SRS resources in an SRS resource set, and the power control process is based on at least one of a P0 value, a closed-loop state, more than one DL PL-RS, and more than one ⁇ .
  • Each transmission occasion of an SRS resource is directed to multiple TRPs.
  • one set of one P0, one CL state, N ⁇ , and N PL-RS may be configured, and one of the N ⁇ , PL-RS ⁇ may be selected.
  • M (M ⁇ 1) power control processes are used for the SRS resource set.
  • Each of the M power control processes is based on a different UL power control parameter set associated with a different DL PL-RS.
  • the UL power control parameter set includes P0, ⁇ , and CL states. Different transmission occasions of the SRS resource may be directed to different TRPs.
  • the SRS resource set is P/SP-SRS only.
  • M sets of one P0, one CL state, one ⁇ , and one PL-RS may be configured, and one set may be selected.
  • M (M ⁇ 1) power control processes are used for the SRS resource set.
  • Each of the M power control processes is based on at least one of a P0 value, a CL state, N (N ⁇ 1) DL PL-RS, and N ⁇ .
  • N may be different for different power control processes.
  • Transmission occasions of the SRS resources may be directed to the N TRPs depending on which power control process is used.
  • M sets of one P0, one CL state, N ⁇ , and N PL-RS may be set, one set may be selected, and one of the N ⁇ , PL-RS ⁇ in that set may be selected.
  • TPC transmission power control
  • the inventors therefore came up with a method for controlling the power of the SRS.
  • A/B and “at least one of A and B” may be interpreted as interchangeable. Also, in this disclosure, “A/B/C” may mean “at least one of A, B, and C.”
  • Radio Resource Control RRC
  • RRC parameters RRC parameters
  • RRC messages higher layer parameters, fields, information elements (IEs), settings, etc.
  • IEs information elements
  • CE Medium Access Control
  • update commands activation/deactivation commands, etc.
  • higher layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or any combination thereof.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • the MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc.
  • the broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.
  • MIB Master Information Block
  • SIB System Information Block
  • RMSI Remaining Minimum System Information
  • OSI 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
  • a b , a_b, and the notation with b added to the lower right of a may be read as mutually interchangeable.
  • a c , a ⁇ c, and the notation with c added to the upper right of a may be read as mutually interchangeable.
  • a b c , a_b ⁇ c, and the notation with b added to the lower right of a and c added to the upper right may be read as mutually interchangeable.
  • ceil(x), ceiling function, and ceiling function may be read as mutually interchangeable.
  • floor(x), floor function, and floor function may be read as mutually interchangeable.
  • SRS wireless communication method
  • P-SRS P-SRS
  • SP-SRS SP-SRS
  • A(AP)-SRS may be interchangeable.
  • SRS resource, SRS resource set, and SRS resource set group may be interchangeable.
  • TRP Time Division Multiple Access
  • TRP ID higher layer configured ID
  • configurable index specific index
  • TRP index panel index
  • index introduced for CJT antenna port index
  • RS (SRS) port index CORESET pool index
  • TCI state position ID configured by higher layer signaling
  • SRS resource set may be interchangeable.
  • the set of power control parameters may include at least one of the following several parameters/information: ⁇ P0 (P0_SRS) Closed loop state (power control regulation state, l) Path loss RS (SSB or CSI-RS) ⁇
  • P0_SRS Closed loop state
  • SSB Path loss RS
  • the SRS for DL CSI acquisition and the SRS resource in the SRS resource set with usage set to antenna switching may be interpreted as interchangeable.
  • settings SRS settings
  • SRS resource set settings SRS resource settings
  • the power allocated to a certain SRS transmission/certain SRS resource/certain SRS resource set, P_SRS may be interpreted as interchangeable.
  • This embodiment relates to determining a set of power control parameters for the SRS.
  • the UE may determine a set of power control parameters for SRS for DL CSI acquisition. With this operation, there is no signaling overhead for indicating the set and an optimized transmit power can be assigned for SRS transmission.
  • the UE may determine the set of power control parameters based on a comparison of multiple powers calculated based on multiple candidate sets of power control parameters.
  • the UE may follow several steps: Step 1: For each candidate set of power control parameters, the UE calculates the power P_SRS. Step 2: For an SRS resource or an SRS resource set, the UE selects one of the calculated P_SRSs. The UE may select a set of power parameters corresponding to the selected P_SRS and apply the selected set for transmissions using that SRS resource or SRS resource set.
  • the selection policy in step 2 may be one of several policies: Maximum P_SRS is selected: According to this policy, any coherent TRP can receive SRS with sufficient power. The minimum P_SRS is selected. According to this policy, any coherent TRP can avoid strong interference from SRS.
  • the UE may determine a set of power control parameters based on a comparison of multiple path losses calculated based on multiple candidate path loss RSs.
  • the UE may follow several steps: Step 1: For each candidate pathloss RS, the UE calculates the amount of pathloss. Step 2: For power control of an SRS resource or an SRS resource set, the UE selects one of the calculated path losses (or corresponding candidate path loss RSs). The UE may select a set of power parameters corresponding to the selected one path loss and apply the selected set for transmissions using that SRS resource or SRS resource set.
  • the selection policy in step 2 may be one of several policies: The maximum path loss (or its corresponding path loss RS) is selected. According to this policy, any coherent TRP can receive the SRS with sufficient power. The minimum path loss (or its corresponding path loss RS) is selected. According to this policy, any coherent TRP can avoid strong interference from SRS.
  • the UE may determine a set of power control parameters based on a comparison of multiple path losses calculated based on multiple candidate path losses RS and multiple candidate ⁇ .
  • the UE may follow several steps: Step 1: For each candidate pathloss RS and each configured ⁇ , the UE calculates/identifies the value of Pathloss ⁇ . Step 2: For power control of an SRS resource or an SRS resource set, the UE selects one of the multiple values of the calculated pathloss ⁇ (or corresponding multiple candidate pathloss RSs and multiple candidate ⁇ s). The UE may select a set of power parameters corresponding to the selected one value and apply the selected set for transmissions using that SRS resource or SRS resource set.
  • the selection policy in step 2 may be one of several policies: The maximum value of pathloss ⁇ is selected. According to this policy, any coherent TRP can receive the SRS with sufficient power. The minimum value of path loss x ⁇ is selected. According to this policy, any coherent TRP can avoid strong interference from SRS.
  • the UE can determine an appropriate set of power control parameters for the SRS.
  • This embodiment relates to configuring/indicating a set of power control parameters for the SRS.
  • the UE may be configured/instructed by the NW/base station to set a set of power control parameters for the SRS for DL CSI acquisition. This operation allows the NW/base station to determine the SRS transmission power as needed.
  • the UE may be configured with multiple sets of power control parameters for SRS for DL CSI acquisition and instructed to select one of the sets.
  • the setting/instruction combination may follow at least one of several options: ---Option 1-1 Multiple sets are configured by the RRC IE, and one of the sets is indicated by the MAC CE. ---Option 1-2 Multiple sets are configured by the RRC IE, and one of the sets is indicated by the DCI. ---Option 1-3 Multiple sets are indicated by the MAC CE, one of which is indicated by the DCI.
  • the conditions for application of the instructions may be according to at least one of several options: ---Option 2-1 The indicated selection is applied a period of time X after receipt of the indication, where X may be in milliseconds, microseconds, slots, subframes, or frames. ---Option 2-2 The indicated selection applies a period X after the transmission of a HARQ-ACK for that indication, which may be via PUCCH or PUSCH (MAC CE on PUSCH), where X may be in milliseconds, microseconds, slots, subframes, or frames. ---Option 2-3 The indicated selection applies only to the SRS triggered by the same indication, which may be the AP-SRS.
  • the UE can be configured/instructed to have an appropriate set of power control parameters for the SRS.
  • This embodiment relates to a combination of decisions on the UE side and configuration on the network (NW)/base station side.
  • the UE may be configured/instructed to configure multiple sets of power control parameters and select one of the multiple sets for DL CSI acquisition. A good balance between signaling overhead and network/base station side control can be achieved.
  • the UE's decision policy may follow embodiment #1.
  • the network/base station's settings/instructions may follow embodiment #2.
  • Example 1 As in the example of Fig. 11, the UE may be configured with multiple sets of ⁇ P0, CL state, ⁇ , pathloss RS ⁇ in S110. The UE may determine/select one of the multiple sets for transmission using the SRS resource or SRS resource set in S120. The UE may apply the determined set to the transmission using the SRS resource or SRS resource set in S130.
  • the UE may be configured with multiple sets of ⁇ P0, CL state, N ⁇ , N pathloss RS ⁇ .
  • the UE may be indicated one of the multiple sets.
  • the UE may determine/select one ⁇ , pathloss RS ⁇ of ⁇ N ⁇ , N pathloss RS ⁇ in the indicated set for transmission using the SRS resource or SRS resource set.
  • the UE may apply the determined set for transmission using the SRS resource or SRS resource set.
  • the UE can use appropriate power control parameters for the SRS by configuration/instruction and decision.
  • any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, any information is received from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.
  • NW network
  • BS base station
  • the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader that is not specified in existing standards.
  • LCID Logical Channel ID
  • the notification When the notification is made by a DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.
  • RNTI Radio Network Temporary Identifier
  • CRC Cyclic Redundancy Check
  • notification of any information to the UE in the above-mentioned embodiments may be performed periodically, semi-persistently, or aperiodically.
  • notification of any information from the UE (to the NW) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.
  • physical layer signaling e.g., UCI
  • higher layer signaling e.g., RRC signaling, MAC CE
  • a specific signal/channel e.g., PUCCH, PUSCH, PRACH, reference signal
  • the MAC CE may be identified by including a new LCID in the MAC subheader that is not specified in existing standards.
  • the notification may be transmitted using PUCCH or PUSCH.
  • notification of any information from the UE may be performed periodically, semi-persistently, or aperiodically.
  • At least one of the above-mentioned embodiments may be applied when a specific condition is satisfied, which may be specified in a standard or may be notified to a UE/BS using higher layer signaling/physical layer signaling.
  • At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.
  • the specific UE capabilities may indicate at least one of the following: - Supporting specific processing/operations/control/information for at least one of the above embodiments. Support for determination of SRS power control parameters. Support for setting/indicating multiple SRS power control parameters.
  • the above-mentioned specific UE capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities per frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), capabilities per frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities per subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities per Feature Set (FS) or Feature Set Per Component-carrier (FSPC).
  • FR1 Frequency Range 1
  • FR2 FR2, FR3, FR4, FR5, FR2-1, FR2-2
  • SCS subcarrier Spacing
  • FS Feature Set
  • FSPC Feature Set Per Component-carrier
  • the specific UE capabilities may be capabilities that are applied across all duplexing methods (commonly regardless of the duplexing method), or may be capabilities for each duplexing method (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)).
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • At least one of the above-mentioned embodiments may be applied when the UE configures/activates/triggers specific information related to the above-mentioned embodiments (or performs the operations of the above-mentioned embodiments) by higher layer signaling/physical layer signaling.
  • the specific information may be information indicating that the operations of the above-mentioned embodiments are enabled, any RRC parameters for a specific release (e.g., Rel. 18/19), etc.
  • the RRC parameters may have names that are the names of existing RRC parameters with "r18"/"r19" added.
  • the UE may apply, for example, the behavior of Rel. 15/16/17.
  • a terminal comprising: a control unit that determines a power control parameter set from a plurality of candidates for power control parameters based on the setting, and applies the power control parameter set to transmission using the SRS resource set.
  • the control unit calculates multiple values related to power based on the multiple candidates, and determines the power control parameter set based on the multiple values.
  • the receiving unit receives information indicating at least one of the plurality of candidates and the power control parameter set.
  • the receiving unit receives information indicating the plurality of candidates, The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the control unit calculates a plurality of values related to power based on the plurality of candidates, and determines the power control parameter set based on the plurality of values.
  • Wired communication system A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below.
  • communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these.
  • FIG. 13 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
  • the wireless communication system 1 (which may simply be referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) specified by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.
  • LTE Long Term Evolution
  • 3GPP Third Generation Partnership Project
  • 5G NR 5th generation mobile communication system New Radio
  • the wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
  • MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.
  • RATs Radio Access Technologies
  • MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.
  • 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 (MN), and the NR base station (gNB) is the secondary node (SN).
  • the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
  • the wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (e.g., dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).
  • dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).
  • gNBs NR base stations
  • N-DC Dual Connectivity
  • the wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged within the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1.
  • a user terminal 20 may be located within at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.
  • the user terminal 20 may be connected to at least one of the multiple base stations 10.
  • the user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple 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 for example, FR1 may correspond to a higher frequency band than FR2.
  • 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 multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to the Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication).
  • wire e.g., optical fiber conforming to the Common Public Radio Interface (CPRI), X2 interface, etc.
  • NR communication e.g., NR communication
  • base station 11 which corresponds to the upper station
  • IAB Integrated Access Backhaul
  • base station 12 which corresponds to a relay station
  • the base station 10 may be connected to the core network 30 directly or via another base station 10.
  • the core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), etc.
  • EPC Evolved Packet Core
  • 5GCN 5G Core Network
  • NGC Next Generation Core
  • the core network 30 may include network functions (Network Functions (NF)) such as, for example, a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM).
  • NF Network Functions
  • UPF User Plane Function
  • AMF Access and Mobility management Function
  • SMF Session Management Function
  • UDM Unified Data Management
  • AF Application Function
  • DN Data Network
  • LMF Location Management Function
  • OAM Operation, Administration and Maintenance
  • the user terminal 20 may be a terminal that supports at least one of the communication methods such as LTE, LTE-A, and 5G.
  • a wireless access method based on Orthogonal Frequency Division Multiplexing 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
  • the radio access method may also be called a waveform.
  • other radio access methods e.g., other single-carrier transmission methods, other multi-carrier transmission methods
  • a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.
  • PDSCH Physical Downlink Shared Channel
  • PBCH Physical Broadcast Channel
  • PDCCH Physical Downlink Control Channel
  • an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PRACH Physical Random Access Channel
  • SIB System Information Block
  • PDSCH User data, upper layer control information, System Information Block (SIB), etc.
  • SIB System Information Block
  • PUSCH User data, upper layer control information, etc.
  • MIB Master Information Block
  • PBCH Physical Broadcast Channel
  • Lower layer control information may be transmitted by the PDCCH.
  • the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.
  • DCI Downlink Control Information
  • the DCI for scheduling the PDSCH may be called a DL assignment or DL DCI
  • the DCI for scheduling the PUSCH may be called a UL grant or UL DCI.
  • the PDSCH may be interpreted as DL data
  • the PUSCH may be interpreted as UL data.
  • a control resource set (COntrol REsource SET (CORESET)) and a search space may be used to detect the PDCCH.
  • the CORESET corresponds to the resources to search for DCI.
  • the search space corresponds to the search region and search method of PDCCH candidates.
  • One CORESET may be associated with one or multiple search spaces. The UE may monitor the CORESET associated with a search space based on the search space configuration.
  • a 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 the terms “search space,” “search space set,” “search space setting,” “search space set setting,” “CORESET,” “CORESET setting,” etc. in this disclosure may be read as interchangeable.
  • the PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.), and a scheduling request (SR).
  • UCI uplink control information
  • CSI channel state information
  • HARQ-ACK Hybrid Automatic Repeat reQuest ACKnowledgement
  • ACK/NACK ACK/NACK
  • SR scheduling request
  • the PRACH may transmit a random access preamble for establishing a connection with a cell.
  • downlink, uplink, etc. may be expressed without adding "link.”
  • various channels may be expressed without adding "Physical” to the beginning.
  • a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted.
  • a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a 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 an SS (PSS, SSS) and a PBCH (and a DMRS for PBCH) may be called an SS/PBCH block, an SS Block (SSB), etc.
  • the SS, SSB, etc. may also be called a reference signal.
  • a measurement reference signal Sounding Reference Signal (SRS)
  • a demodulation reference signal DMRS
  • UL-RS uplink reference signal
  • DMRS may also be called a user equipment-specific reference signal (UE-specific Reference Signal).
  • the base station 14 is a diagram showing an example of a configuration of a base station according to an embodiment.
  • the base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.
  • this example mainly shows the functional blocks of the characteristic parts of this embodiment, and the base station 10 may also be assumed to have other functional blocks necessary for wireless communication. Some of the processing of each part 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 are described based on a common understanding in the technical field to which this disclosure pertains.
  • the control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc.
  • the control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc.
  • the control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120.
  • the control unit 110 may perform call processing of communication channels (setting, release, etc.), status management of the base station 10, management of radio resources, etc.
  • the transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123.
  • the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
  • the transceiver unit 120 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on a common understanding in the technical field to which the present disclosure relates.
  • the transceiver unit 120 may be configured as an integrated transceiver unit, or may be composed of a transmission unit and a reception unit.
  • the transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122.
  • the reception unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.
  • the transmitting/receiving antenna 130 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.
  • the transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc.
  • the transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.
  • the transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.
  • digital beamforming e.g., precoding
  • analog beamforming e.g., phase rotation
  • the transceiver 120 may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc., on data and control information obtained from the control unit 110, and generate a bit string to be transmitted.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • HARQ retransmission control HARQ retransmission control
  • the transceiver 120 may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
  • transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
  • channel coding which may include error correction coding
  • DFT Discrete Fourier Transform
  • IFFT Inverse Fast Fourier Transform
  • the transceiver unit 120 may perform modulation, filtering, amplification, etc., on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.
  • the transceiver unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.
  • the transceiver 120 may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.
  • reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.
  • FFT Fast Fourier Transform
  • IDFT Inverse Discrete Fourier Transform
  • filtering demapping
  • demodulation which may include error correction decoding
  • MAC layer processing which may include error correction decoding
  • the transceiver 120 may perform measurements on the received signal.
  • the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal.
  • the measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc.
  • RSRP Reference Signal Received Power
  • RSSI Received Signal Strength Indicator
  • the measurement results may be output to the control unit 110.
  • the transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.
  • devices included in the core network 30 e.g., network nodes providing NF
  • other base stations 10, etc. may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.
  • the transmitter and receiver of the base station 10 in this disclosure may be configured with at least one of the transmitter/receiver 120, the transmitter/receiver antenna 130, and the transmission path interface 140.
  • the transceiver 120 may transmit a channel state information (CSI) report configuration including one or more parameters indicating at least one of a rank indicator constraint and a codebook subset constraint.
  • the controller 110 may apply the one or more parameters to the coherent joint transmission CSI and control the reception of the CSI report.
  • CSI channel state information
  • the transceiver 120 may transmit a configuration of a sounding reference signal (SRS) resource set for antenna switching.
  • the controller 110 may control reception of a transmission using the SRS resource set based on the configuration.
  • a power control parameter set determined from multiple candidates for power control parameters may be applied to the transmission.
  • the (User terminal) 15 is a diagram showing an example of the configuration of a user terminal according to an embodiment.
  • the user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the control unit 210, the transceiver unit 220, and the transceiver antenna 230 may each include one or more.
  • this example mainly shows the functional blocks of the characteristic parts of this embodiment, and the user terminal 20 may also be assumed to have other functional blocks necessary for wireless communication. Some of the processing of each part 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 are described based on a common understanding in the technical field to which this disclosure pertains.
  • the control unit 210 may control signal generation, mapping, etc.
  • the control unit 210 may control transmission and reception using the transceiver unit 220 and the transceiver antenna 230, measurement, etc.
  • the control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.
  • the transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223.
  • the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
  • the transceiver unit 220 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on a common understanding in the technical field to which the present disclosure relates.
  • the transceiver unit 220 may be configured as an integrated transceiver unit, or may be composed of a transmission unit and a reception unit.
  • the transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222.
  • the reception unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.
  • the transmitting/receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.
  • the transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc.
  • the transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.
  • the transceiver 220 may form at least one of the transmit beam and receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.
  • digital beamforming e.g., precoding
  • analog beamforming e.g., phase rotation
  • the transceiver 220 may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data and control information acquired from the controller 210, and generate a bit string to be transmitted.
  • RLC layer processing e.g., RLC retransmission control
  • MAC layer processing e.g., HARQ retransmission control
  • the transceiver 220 may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
  • transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
  • Whether or not to apply DFT processing may be based on the settings of transform precoding.
  • the transceiver unit 220 transmission processing unit 2211
  • the transceiver unit 220 may perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, and when transform precoding is not enabled, it is not necessary to perform DFT processing as the above-mentioned transmission processing.
  • the transceiver unit 220 may perform modulation, filtering, amplification, etc., on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.
  • the transceiver unit 220 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.
  • the transceiver 220 may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.
  • reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.
  • the transceiver 220 may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal.
  • the measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc.
  • the measurement results may be output to the control unit 210.
  • the measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources.
  • the channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources.
  • the measurement unit 223 may derive interference measurements for CSI calculation based on interference measurement resources.
  • the interference measurement resources may be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc.
  • CSI-IM may be called CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS.
  • CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be read as interchangeable.
  • the transmitting unit and receiving unit of the user terminal 20 in this disclosure may be configured by at least one of the transmitting/receiving unit 220 and the transmitting/receiving antenna 230.
  • the transceiver 220 may receive a setting for a sounding reference signal (SRS) resource set for antenna switching.
  • the controller 210 may determine a power control parameter set from multiple power control parameter candidates based on the setting, and apply the power control parameter set to a transmission using the SRS resource set.
  • SRS sounding reference signal
  • the control unit 210 may calculate multiple values related to power based on the multiple candidates, and determine the power control parameter set based on the multiple values.
  • the transceiver 220 may receive information indicating at least one of the multiple candidates and the power control parameter set.
  • the transceiver 220 may receive information indicating the multiple candidates.
  • the control unit 210 may calculate multiple values related to power based on the multiple candidates, and determine the power control parameter set based on the multiple values.
  • each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.).
  • the functional blocks may be realized by combining the one device or the multiple devices with software.
  • the functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
  • a functional block (component) that performs the transmission function may be called a transmitting unit, a transmitter, and the like. In either case, as mentioned above, there are no particular limitations on the method of realization.
  • a base station, a user terminal, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 16 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment.
  • the above-mentioned base station 10 and user terminal 20 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 terms apparatus, circuit, device, section, unit, etc. may be interpreted as interchangeable.
  • the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figures, or may be configured to exclude some of the devices.
  • processor 1001 may be implemented by one or more chips.
  • the functions of the base station 10 and the user terminal 20 are realized, for example, by loading specific software (programs) onto hardware such as the processor 1001 and memory 1002, causing the processor 1001 to perform calculations, control communications via the communication device 1004, and control at least one of the reading and writing of data in the memory 1002 and storage 1003.
  • the processor 1001 for example, runs an operating system to control the entire computer.
  • the processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, etc.
  • CPU central processing unit
  • control unit 110 210
  • transmission/reception unit 120 220
  • etc. may be realized by the processor 1001.
  • the processor 1001 also reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
  • the programs used are those that cause a computer to execute at least some of the operations described in the above embodiments.
  • the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks.
  • Memory 1002 is a computer-readable recording medium and may be composed of at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other suitable storage media. Memory 1002 may also be called a register, cache, main memory, etc. Memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.
  • ROM Read Only Memory
  • EPROM Erasable Programmable ROM
  • EEPROM Electrically EPROM
  • RAM Random Access Memory
  • Memory 1002 may also be called a register, cache, main memory, etc.
  • Memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.
  • Storage 1003 is a computer-readable recording medium and may be composed of at least one of a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium.
  • Storage 1003 may also be referred to as an auxiliary storage device.
  • the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, or a communication module.
  • the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the above-mentioned transmitting/receiving unit 120 (220), transmitting/receiving antenna 130 (230), etc. may be realized by the communication device 1004.
  • the transmitting/receiving unit 120 (220) may be implemented as a transmitting unit 120a (220a) and a receiving unit 120b (220b) that are physically or logically separated.
  • the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside.
  • the input device 1005 and the output device 1006 may be integrated into one structure (e.g., a touch panel).
  • each device such as the processor 1001 and memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
  • the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using the hardware.
  • the processor 1001 may be implemented using at least one of these pieces of hardware.
  • a channel, a symbol, and a signal may be read as mutually interchangeable.
  • a signal may also be a message.
  • a reference signal may be abbreviated as RS, and may be called a pilot, a pilot signal, or the like depending on the applied standard.
  • a component carrier may also 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 (e.g., 1 ms) that is independent of numerology.
  • the numerology may be a communication parameter that is applied to at least one of the transmission and reception of a signal or channel.
  • the numerology may indicate, for example, at least one of the following: SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, 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.
  • SCS SubCarrier Spacing
  • TTI Transmission Time Interval
  • 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 consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.).
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • a slot may also be a time unit based on numerology.
  • a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A.
  • a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.
  • a radio frame, a subframe, a slot, a minislot, and a symbol all represent time units when transmitting a signal.
  • a different name may be used for a radio frame, a subframe, a slot, a minislot, and a symbol, respectively.
  • the time units such as a frame, a subframe, a slot, a minislot, and a symbol in this disclosure may be read as interchangeable.
  • one subframe may be called a TTI
  • multiple consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI.
  • at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
  • the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
  • TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
  • a base station schedules each user terminal by allocating radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) in TTI units.
  • radio resources such as frequency bandwidth and transmission power that can be used by each user terminal
  • the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
  • the time interval e.g., the number of symbols
  • the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit of scheduling.
  • the number of slots (minislots) that constitute the minimum time unit of 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.
  • a TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
  • a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
  • a short TTI e.g., a shortened TTI, etc.
  • TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
  • the number of subcarriers included in an RB may be the same regardless of numerology, and may be, for example, 12.
  • 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 be one slot, one minislot, one subframe, or one TTI in length.
  • One TTI, one subframe, etc. may each be composed of one or more resource blocks.
  • one or more RBs may be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.
  • PRB Physical RB
  • SCG sub-carrier Group
  • REG resource element group
  • PRB pair an RB pair, etc.
  • a resource block may be composed of one or more resource elements (REs).
  • REs resource elements
  • one RE may be a radio resource area of one subcarrier and one symbol.
  • a Bandwidth Part which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within the BWP.
  • the BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL).
  • BWP UL BWP
  • BWP for DL DL BWP
  • One or more BWPs may be configured for a UE within one carrier.
  • At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
  • BWP bitmap
  • radio frames, subframes, slots, minislots, and symbols 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 subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
  • the information, parameters, etc. described in this disclosure may be represented using absolute values, may be represented using relative values from a predetermined value, or may be represented using other corresponding information.
  • a radio resource may be indicated by a predetermined index.
  • the names used for parameters and the like in this disclosure are not limiting in any respect. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure.
  • the various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any respect.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
  • information, signals, etc. may be output from a higher layer to a lower layer and/or from a lower layer to a higher layer.
  • Information, signals, etc. may be input/output via multiple network nodes.
  • Input/output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input/output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.
  • a specific location e.g., memory
  • Input/output information, signals, etc. may be overwritten, updated, or added to.
  • Output information, signals, etc. may be deleted.
  • Input information, signals, etc. may be transmitted to another device.
  • the 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 performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher 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 of these.
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • the physical layer signaling may be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc.
  • the RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
  • the MAC signaling may be notified, for example, using a MAC Control Element (CE).
  • CE MAC Control Element
  • notification of specified information is not limited to explicit notification, but may be implicit (e.g., by not notifying the specified information or by notifying other information).
  • the determination may be based on a value represented by a single bit (0 or 1), a Boolean value represented by true or false, or a comparison of numerical values (e.g., with a predetermined value).
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
  • a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave, etc.), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
  • wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
  • wireless technologies such as infrared, microwave, etc.
  • Network may refer to the devices included in the network (e.g., base stations).
  • the antenna port may be interchangeably read as an antenna port for any signal/channel (e.g., a demodulation reference signal (DMRS) port).
  • the resource may be interchangeably read as a resource for any signal/channel (e.g., a reference signal resource, an SRS resource, etc.).
  • the resource may include time/frequency/code/space/power resources.
  • the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.
  • the above groups may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, etc.
  • CDM Code Division Multiplexing
  • RS Reference Signal
  • CORESET Control Resource Set
  • beam SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable.
  • SRI SRS Resource Indicator
  • CORESET CORESET pool
  • PDSCH PUSCH
  • codeword CW
  • TB transport block
  • RS etc.
  • TCI state downlink TCI state
  • DL TCI state downlink TCI state
  • UL TCI state uplink TCI state
  • unified TCI state common TCI state
  • joint TCI state etc.
  • QCL QCL
  • QCL assumptions QCL relationship
  • QCL type information QCL property/properties
  • specific QCL type e.g., Type A, Type D
  • specific QCL type e.g., Type A, Type D
  • index identifier
  • indicator indication, resource ID, etc.
  • sequence list, set, group, cluster, subset, etc.
  • TCI state ID may be interchangeable.
  • TCI state ID may be interchangeable as “set of spatial relationship information (TCI state)", “one or more pieces of spatial relationship information”, etc.
  • TCI state and TCI may be interchangeable.
  • Spatial relationship information and spatial relationship may be interchangeable.
  • Base Station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.
  • a base station can accommodate one or more (e.g., three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))).
  • RRH Remote Radio Head
  • the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
  • a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control/operate based on the information.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc.
  • at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
  • the moving body in question refers to an object that can move, and the moving speed is arbitrary, and of course includes the case where the moving body is stationary.
  • the moving body in question includes, but is not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, balloons, and objects mounted on these.
  • the moving body in question may also be a moving body that moves autonomously based on an operating command.
  • the moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned).
  • a vehicle e.g., a car, an airplane, etc.
  • an unmanned moving object e.g., a drone, an autonomous vehicle, etc.
  • a robot manned or unmanned
  • at least one of the base station and the mobile station may also include 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. 17 is a diagram showing 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 (including a current sensor 50, 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 unit 59, and a communication module 60.
  • various sensors including a current sensor 50, 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 unit 59 including a communication module 60.
  • the drive unit 41 is composed of at least one of an engine, a motor, and a hybrid of an engine and a motor, for example.
  • the steering unit 42 includes at least a steering wheel (also called a handlebar), 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 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an Input/Output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle.
  • the electronic control unit 49 may also be called an Electronic Control Unit (ECU).
  • ECU Electronic Control Unit
  • Signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the motor current, a rotation speed signal of the front wheels 46/rear wheels 47 acquired by a rotation speed sensor 51, an air pressure signal of the front wheels 46/rear wheels 47 acquired by an air pressure sensor 52, a vehicle speed signal acquired by a vehicle speed sensor 53, an acceleration signal acquired by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 acquired by a brake pedal sensor 56, an operation signal of the shift lever 45 acquired by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 58.
  • the information service unit 59 is composed of various devices, such as a car navigation system, audio system, speakers, displays, televisions, and radios, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices.
  • the information service unit 59 uses information acquired from external devices via the communication module 60, etc., to provide various information/services (e.g., multimedia information/multimedia services) to the occupants of the vehicle 40.
  • various information/services e.g., multimedia information/multimedia services
  • the information service unit 59 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.
  • input devices e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
  • output devices e.g., a display, a speaker, an LED lamp, a touch panel, etc.
  • the driving assistance system unit 64 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving load, such as a millimeter wave radar, a Light Detection and Ranging (LiDAR), a camera, a positioning locator (e.g., a Global Navigation Satellite System (GNSS)), map information (e.g., a High Definition (HD) map, an Autonomous Vehicle (AV) map, etc.), a gyro system (e.g., an Inertial Measurement Unit (IMU), an Inertial Navigation System (INS), etc.), an Artificial Intelligence (AI) chip, and an AI processor, and one or more ECUs that control these devices.
  • the driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize a driving assistance function or an autonomous driving function.
  • 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 transmits and receives data (information) via the communication port 63 between the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58 that are provided on the vehicle 40.
  • 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 an external device. For example, it transmits and receives various information to and from the 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 above-mentioned base station 10 or user terminal 20.
  • the communication module 60 may also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it may function as at least one of the base station 10 and user terminal 20).
  • the communication module 60 may transmit at least one of the signals from the various sensors 50-58 described above input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication.
  • the electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept 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, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle.
  • the information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 60).
  • the communication module 60 also stores various information received from external devices in memory 62 that can be used by the microprocessor 61. Based on the information stored in memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided on the vehicle 40.
  • the base station in the present disclosure may be read as a user terminal.
  • each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
  • the user terminal 20 may be configured to have the functions of the base station 10 described above.
  • terms such as "uplink” and "downlink” may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink").
  • the uplink channel, downlink channel, etc. may be read as the sidelink channel.
  • the user terminal in this disclosure may be interpreted as a base station.
  • the base station 10 may be configured to have the functions of the user terminal 20 described above.
  • operations that are described as being performed by a base station may in some cases be performed by its upper node.
  • a network that includes one or more network nodes having base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) or a Serving-Gateway (S-GW)), or a combination of these.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • each aspect/embodiment described in this disclosure may be used alone, in combination, or switched between depending on the implementation.
  • the processing procedures, sequences, flow charts, etc. of each aspect/embodiment described in this disclosure may be rearranged as long as there is no inconsistency.
  • the methods described in this disclosure present elements of various steps using an exemplary order, 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
  • 4th generation mobile communication system 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • 6G 6th generation mobile communication system
  • xG x is, for example, an integer or decimal
  • Future Radio Access FX
  • GSM Global System for Mobile communications
  • CDMA2000 Code Division Multiple Access
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX (registered trademark)
  • IEEE 802.20 Ultra-WideBand (UWB), Bluetooth (registered trademark), and other appropriate wireless communication methods, as well as next-generation systems that are expanded, modified,
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to elements using designations such as “first,” “second,” etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a 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 some way.
  • determining may encompass a wide variety of actions. For example, “determining” may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking in a table, database, or other data structure), ascertaining, etc.
  • Determining may also be considered to mean “determining” receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.
  • judgment (decision) may be considered to mean “judging (deciding)” resolving, selecting, choosing, establishing, comparing, etc.
  • judgment (decision) may be considered to mean “judging (deciding)” some kind of action.
  • judgment (decision) may be interpreted interchangeably with the actions described above.
  • expect may be read as “be expected”.
  • "expect(s)" ("" may be expressed, for example, as a that clause, a to infinitive, etc.) may be read as “be expected".
  • "does not expect" may be read as "be not expected".
  • "An apparatus A is not expected" may be read as "An apparatus B other than apparatus A does not expect" (for example, if apparatus A is a UE, apparatus B may be a base station).
  • the "maximum transmit power" referred to in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.
  • connection and “coupled,” or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
  • the coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected” may be read as "accessed.”
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean “A and B are each different from C.”
  • Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
  • timing, time, duration, time instance, any time unit e.g., slot, subslot, symbol, subframe
  • period occasion, resource, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
PCT/JP2023/005512 2023-02-16 2023-02-16 端末、無線通信方法及び基地局 Ceased WO2024171381A1 (ja)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020510383A (ja) * 2017-05-04 2020-04-02 エルジー エレクトロニクス インコーポレイティド 無線通信システムにおける端末のサウンディング方法及びこのための装置
WO2020255401A1 (ja) * 2019-06-21 2020-12-24 株式会社Ｎｔｔドコモ 端末及び無線通信方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020510383A (ja) * 2017-05-04 2020-04-02 エルジー エレクトロニクス インコーポレイティド 無線通信システムにおける端末のサウンディング方法及びこのための装置
WO2020255401A1 (ja) * 2019-06-21 2020-12-24 株式会社Ｎｔｔドコモ 端末及び無線通信方法

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