WO2022074811A1

WO2022074811A1 - Terminal, wireless communication method, and base station

Info

Publication number: WO2022074811A1
Application number: PCT/JP2020/038245
Authority: WO
Inventors: 祐輝松村; 聡永田; ウェイチースン; ジンワン; ランチン
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2022-04-14
Also published as: CN116325962A

Abstract

A terminal according to one aspect of the present disclosure is characterized by having: a reception unit which receives downlink control information including transmission power control information and a specific field relating to the repetition of a physical downlink control channel including the downlink control information; and a control unit which applies the transmission power control information to the calculation of transmission power on the basis of the specific field. According to one aspect of the present disclosure, transmission power can be calculated appropriately.

Description

Terminals, wireless communication methods and base stations

This disclosure relates to terminals, wireless communication methods and base stations in next-generation mobile communication systems.

Long Term Evolution (LTE) has been specified for the purpose of higher data rate, lower latency, etc. in the Universal Mobile Telecommunications System (UMTS) network (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel.10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

A successor system to LTE (for example, 5th generation mobile communication system (5G), 5G + (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 or later, etc.) is also being considered. ..

In an existing LTE system (eg, 3GPP Rel.8-14), the user terminal (User Equipment (UE)) is a UL data channel (eg, Physical Uplink Shared Channel (PUSCH)) and a UL control channel (eg, Physical Uplink). Uplink control information (Uplink Control Information (UCI)) is transmitted using at least one of the Control Channel (PUCCH).

In the control of the transmission power of the physical uplink shared channel (PUSCH), the physical uplink control channel (PUCCH), and the measurement reference signal (SRS), the transmission power control (TPC) command value included in the downlink control information (DCI). Power adjustment is performed using the power control adjustment state based on the total.

However, the link between two or more PDCCH candidates is not explicit, and the UE may not know that the PDCCH candidates are linked before decoding. If the power control adjustment state is the sum of the TPC command values in two or more PDCCH candidates with multiple iterations including the TPC command, the UE needs to calculate the TPC command value only once for each of the multiple iterations. .. However, how the UE knows the links between PDCCH candidates after decryption has not been fully considered.

If the link between the PDCCH candidates cannot be known, the UE cannot properly calculate the power control adjustment state, and properly calculates the transmission power of the uplink (for example, PUSCH, PUCCH, SRS). May not be possible.

Therefore, one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station capable of appropriately calculating the transmission power.

A terminal according to one aspect of the present disclosure includes a receiving unit that receives the downlink control information including a specific field relating to repetition of a physical downlink control channel including downlink control information and transmission power control information, and the specific. It is characterized by having a control unit that applies the transmission power control information to the calculation of the transmission power based on the field.

According to one aspect of the present disclosure, the transmission power can be appropriately calculated.

FIG. 1 is a diagram showing an example of PDCCH repetition in aspect 1. FIG. 2 is a diagram showing an example of PDCCH repetition in aspect 2. FIG. 3 is a diagram showing an example of PDCCH repetition in aspect 3. FIG. 4 is a diagram showing an example of PDCCH repetition in aspect 4. FIG. 5 is a diagram showing an example in the case of retransmitting the PDSCH in the fourth aspect. FIG. 6A is a diagram showing an example of a power control adjustment state when the first aspect is applied. FIG. 6B is a diagram showing an example of a power control adjustment state when the second aspect is applied. FIG. 6C is a diagram showing an example of a power control adjustment state when the third aspect is applied. FIG. 7 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 8 is a diagram showing an example of the configuration of the base station according to the embodiment. FIG. 9 is a diagram showing an example of the configuration of the user terminal according to the embodiment. FIG. 10 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.

(TCI, spatial relationship, QCL)
In the NR, the UE may be referred to as at least one of a signal and a channel (signal / channel; in the present disclosure, “A / B”” based on the Transmission Configuration Indication state (TCI state). Similarly, may be read as "at least one of A and B") reception processing (eg, at least one of reception, demapping, demodulation, decoding), transmission processing (eg, transmission, mapping, precoding). , Modulation, at least one of coding) and the like are being considered.

The TCI state may represent what applies to the downlink signal / channel. The equivalent of the TCI state applied to the uplink signal / channel may be expressed as a spatial relation.

The TCI state is information related to signal / channel pseudo collocation (Quasi-Co-Location (QCL)), and may be called spatial reception parameters, spatial relation information, or the like. The TCI state may be set in the UE per channel or per signal.

QCL is an index showing the statistical properties of signals / channels. For example, when one signal / channel and another signal / channel have a QCL relationship, Doppler shift, Doppler spread, and average delay are performed between these different signals / channels. ), Delay spread, and spatial parameter (for example, spatial Rx parameter) can be assumed to be the same (QCL for at least one of these). You may.

The spatial reception parameter may correspond to the received beam of the UE (for example, the received analog beam), or the beam may be specified based on the spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure may be read as sQCL (spatial QCL).

A plurality of types (QCL types) may be specified for the QCL. For example, four QCL types AD with different parameters (or parameter sets) that can be assumed to be the same may be provided, and the parameters (may be referred to as QCL parameters) are shown below:
QCL type A (QCL-A): Doppler shift, Doppler spread, average delay and delay spread,
-QCL type B (QCL-B): Doppler shift and Doppler spread,
QCL type C (QCL-C): Doppler shift and average delay,
-QCL type D (QCL-D): Spatial reception parameter.

Types A to C may correspond to QCL information related to at least one of time and frequency synchronization processing, and type D may correspond to QCL information related to beam control.

The UE may assume that a given control resource set (Control Resource Set (CORESET)) has a specific QCL (eg, QCL type D) relationship with another CORESET, channel or reference signal. , QCL assumption (QCL assumption) may be called.

The UE may determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) of the signal / channel based on the TCI state of the signal / channel or the QCL assumption.

The TCI state is, for example, a target channel (or a reference signal for the channel (Reference Signal (RS))) and another signal (for example, another downlink reference signal (Downlink Reference Signal (DL-RS))). It may be information about QCL with. The TCI state may be set (instructed) by higher layer signaling, physical layer signaling, or a combination thereof.

In the present disclosure, the upper layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.

For MAC signaling, for example, a MAC control element (MAC Control Element (MAC CE)), a MAC Protocol Data Unit (PDU), or the like may be used. The broadcast information includes, for example, a master information block (Master Information Block (MIB)), a system information block (System Information Block (SIB)), a minimum system information (Remaining Minimum System Information (RMSI)), and other system information ( Other System Information (OSI)) may be used.

The physical layer signaling may be, for example, downlink control information (DCI).

The channel / signal to which the TCI state is applied may be referred to as a target channel / RS (target channel / RS), simply a target, etc., and the above-mentioned other signal is a reference RS (reference RS), simply a reference, etc. May be called.

The channels for which the TCI state or spatial relationship is set (designated) are, for example, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), and an uplink shared channel (Physical Uplink Shared). It may be at least one of a Channel (PUSCH)) and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

The RS having a QCL relationship with the channel is, for example, a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a measurement reference signal (Sounding). It may be at least one of Reference Signal (SRS)), CSI-RS for tracking (also referred to as Tracking Reference Signal (TRS)), and reference signal for QCL detection (also referred to as QRS).

The SSB is a signal block including at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), and a broadcast channel (Physical Broadcast Channel (PBCH)). The SSB may be referred to as an SS / PBCH block.

The UE may receive setting information (for example, PDSCH-Config, tci-StatesToAddModList) including a list of information elements of the TCI state by higher layer signaling.

The information element of the TCI state (“TCI-state IE” of RRC) set by the upper layer signaling may include the TCI state ID and one or more QCL information (“QCL-Info”). The QCL information may include at least one of information related to the RS related to the QCL (RS-related information) and information indicating the QCL type (QCL type information). RS-related information includes RS index (for example, SSB index, non-zero power CSI-RS (Non-Zero-Power (NZP) CSI-RS) resource ID (Identifier)), cell index where RS is located, and RS position. It may include information such as an index of the Bandwidth Part (BWP) to be used.

Rel. 15 In the NR, as at least one TCI state of the PDCCH and PDSCH, both the RS of the QCL type A and the RS of the QCL type D, or only the RS of the QCL type A can be set for the UE.

When TRS is set as RS of QCL type A, it is assumed that the same TRS is periodically transmitted over a long period of time, unlike the PDCCH or PDSCH demodulation reference signal (DeModulation Reference Signal (DMRS)). Will be done. The UE can measure the TRS and calculate the average delay, delay spread, and so on.

A UE in which the TRS is set as the RS of the QCL type A in the TCI state of the DMRS of the PDCCH or PDSCH has the same parameters (average delay, delay spread, etc.) of the DMRS of the PDCCH or PDSCH and the QCL type A of the TRS. Since it can be assumed that there is, it is possible to obtain the type A parameters (average delay, delay spread, etc.) of the DMRS of the PDCCH or PDSCH from the measurement result of the TRS. When performing at least one channel estimation of PDCCH and PDSCH, the UE can perform more accurate channel estimation by using the measurement result of the TRS.

A UE in which a QCL type D RS is set can determine a UE reception beam (spatial domain reception filter, UE spatial domain reception filter) using the QCL type D RS.

The RS of the QCL type X in the TCI state may mean an RS having a relationship between a certain channel / signal (DMRS) and the QCL type X, and this RS is called the QCL source of the QCL type X in the TCI state. You may.

(Multi TRP)
In NR, it is considered that one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi-TRP) perform DL transmission to the UE using one or more panels (multi-panel). Has been done. It is also being considered that the UE performs UL transmission to one or more TRPs.

Note that the plurality of TRPs may correspond to the same cell identifier (cell Identifier (ID)) or may correspond to different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

Different code words (Code Word (CW)) and different layers may be transmitted from each TRP of the multi-TRP. Non-Coherent Joint Transmission (NCJT) is being studied as a form of multi-TRP transmission.

In NCJT, for example, TRP1 modulation-maps the first codeword, layer-maps it, and transmits the first PDSCH to the first number of layers (for example, two layers) using the first precoding. Further, the TRP2 modulates and maps the second codeword, layer-maps the second codeword, and transmits the second PDSCH to the second number of layers (for example, the second layer) by using the second precoding. These first PDSCH and second PDSCH may be assumed to be not quasi-co-located in a pseudo-collocation (QCL: Quasi-Co-Location) relationship.

It should be noted that the plurality of PDSCHs NCJT may be defined as partially or completely overlapping with respect to at least one of the time and frequency domains. That is, the first PDSCH from the first TRP and the second PDSCH from the second TRP may overlap at least one of the time and frequency resources.

By the way, Rel. From 17 onwards, it is also assumed that repeated transmission (PDCCH repetition) is applied to PDCCH (or DCI) transmitted from one or more TRPs. For example, it is conceivable to use a plurality of PDCCHs (or DCIs) transmitted from one or more TRPs to schedule or send / receive one or more signals / channels.

PDCCH / DCI to which repeated transmission is applied may be referred to as multi-PDCCH / multi-DCI. The repeated transmission of PDCCH may be read as repeated PDCCH, multiple transmissions of PDCCH, multiple PDCCH transmissions, or multiple PDCCH transmissions.

The multi-PDCCH / multi-DCI may be transmitted from different TRPs. The multi-PDCCH / DCI may be multiplexed by time division multiplexing (TDM) / frequency division multiplexing (FDM) / spatial multiplexing (SDM). For example, when repeating PDCCH (TDM PDCCH repetition) using time multiplexing, PDCCH transmitted from different TRPs is assigned to different time domains.

(Transmission power control)
<Transmission power control for PUSCH>
In the NR, the transmission power of the PUSCH is set to the TPC command (also referred to as a value, an increase / decrease value, a correction value, etc.) indicated by the value of a predetermined field (also referred to as a Transmission Power Control (TPC) command field, etc.) in the DCI. It is controlled based on.

For example, the UE transmits a PUSCH on the active UL BWP b of the carrier f of the serving cell c using the parameter set having the index j (open loop parameter set) and the index l of the power control adjustment state. In this case, the transmission power ( _{PPPUSCH, b, f, c} (i, j, q _d , l)) of the PUSCH at the PUSCH transmission occasion (also referred to as the transmission period) i is the following equation (1). It may be represented by.

Here, the power control adjustment state may be set to have a plurality of states (for example, two states) or a single state by the upper layer parameter. Further, when a plurality of power control adjustment states are set, one of the plurality of power control adjustment states may be identified by the index l (for example, l ∈ {0, 1}). The power control adjustment state may be referred to as a PUSCH power control adjustment state, a first or second state, or the like.

Further, the PUSCH transmission opportunity i is a predetermined period during which the PUSCH is transmitted, and may be composed of, for example, one or more symbols, one or more slots, and the like.

In the formula (1), the _{PCMAX, f, c (i)} are also referred to as, for example, the transmission power (maximum transmission power, UE maximum output power, etc.) of the user terminal set for the carrier f of the serving cell c at the transmission opportunity i. ). _{PO_PUSCH, b, f, c} (j) is, for example, a parameter related to the target received power set for the active UL BWP b of the carrier f of the serving cell c in the parameter set setting j (for example, a parameter related to the transmission power offset, etc. It is also referred to as a transmission power offset P0, a target reception power parameter, and the like).

M ^PUSCH _{RB, b, f, c} (i) is, for example, the number of resource blocks (bandwidth) allocated to the PUSCH for the transmission opportunity i in the active UL BWP b of the serving cell c and the carrier f with the subcarrier interval μ. .. α _{b, f, c} (j) are values provided by the upper layer parameters (for example, also referred to as msg3-Alpha, p0-PUSCH-Alpha, fractional factor, etc.).

PL _{b, f, c} (q _d ) is, for example, an index of a reference signal (path loss reference RS, DL RS for path loss measurement, PUSCH-Pathloss Reference RS) for downlink BWP associated with the active UL BWP b of the carrier f of the serving cell c. It is a path loss (path loss compensation) calculated by the user terminal using q _d .

_{ΔTF, b, f, c} (i) are transmission power adjustment components (offset, transmission format compensation) for UL BWP b of the carrier f of the serving cell c.

f _{b, f, c} (i, l) are values based on the TPC command of the power control adjustment state index l of the active UL BWP b of the carrier f of the serving cell c and the transmission opportunity i (for example, the power control adjustment state, TPC). Cumulative value of commands, closed loop value). For example, f _{b, f, c} (i, l) may be expressed by equation (2) if the TPC cumulative value is not provided to the UE. l may be referred to as a closed loop index.

In equation (2), δ _{punch, b, f, c} (m, l) is the value of the TPC command in DCI (eg DCI format 0_0 or 0_1) and has DCI (eg DCI format 2_2). Encoded with other TPC commands in PDCCH. δ _{punch, b, f, c} (m, l) may be a value determined according to the value of the TPC command in DCI (for example, DCI format 2_2 or 2_3). The Σδ _{punch, b, f, c} (m, l) is a K _punch of the PUSCH transmission opportunity i- ₀ on the active UL BWP b of the PUSCH power control adjustment state l, the serving cell c and the carrier f of the subcarrier interval μ. (Ii ₀ ) A set of TPC command values with cardinality c (D _i ) received by the UE between before the -1 symbol and before the K _punch (i) symbol of the PUSCH transmission opportunity i. It is the total of TPC commands in _Di. Here, i ₀ > 0 is the smallest integer in which the K _punch (i-i ₀ ) -1 symbol of the PUSCH transmission opportunity i-i ₀ is faster than the K _push (i) symbol of the PUSCH transmission opportunity i. be.

When the cumulative value of the TPC command is provided to the UE, the equation (3) may be applied as the power control adjustment state. The f _{b, f, c} (i, l) of the equation (3) are the power control adjustment states in the serving cell c, the transmission opportunity i, the carrier f, and the active UL BWP b. In this case, the power control adjustment state is the absolute value of the TPC command.

If the UE is not provided with a path loss reference RS (eg, PUSCH-PathlossReferenceRS), or if the UE is not provided with individual upper layer parameters, then the UE uses RS resources from the SSB to obtain the Master Information Block (MIB). May be used to calculate PL _{b, f, c} (q _d ).

If the UE is configured with an RS resource index up to the value of the maximum number of path loss reference RSs (eg, maxNrofPUSCH-PathlossReferenceRS) and a set of respective RS settings for the RS resource index by the path loss reference RS. The set of RS resource indexes may include one or both of a set of SS / PBCH block indexes and a set of CSI-RS resource indexes. The UE may identify the RS resource index q _d in the set of RS resource indexes.

If the PUSCH transmission is scheduled by a Random Access Response (RAR) UL grant, the UE may use the same RS resource index q _d as for the corresponding PRACH transmission.

If the UE is provided with a setting for PUSCH power control by SRI (eg, SRI-PUSCH-PowerControl), if provided with a value of 1 or more of the ID of the path loss reference RS, then the SRI field in DCI format 0_1 A mapping between a set of values for and a set of ID values for a path loss reference RS may be obtained from higher layer signaling (eg, sri-PUSCH-PowerControl-Id within SRI-PUSCH-PowerControl). .. The UE may determine the RS resource index q _d from the ID of the path loss reference RS mapped to the SRI field value in DCI format 0_1 that schedules the PUSCH.

If the PUSCH transmission is scheduled in DCI format 0_0 and the UE does not provide the PUCCH spatial relationship information for the PUCCH resource having the lowest index for the active UL BWP b of each carrier f and serving cell c, the UE will not provide the PUCCH spatial relationship information. The same RS resource index q _d as the PUCCH transmission in the resource may be used.

PUSCH transmission is scheduled by DCI format 0_0 and the UE is not provided with spatial settings for PUCCH transmission, or PUSCH transmission is scheduled by DCI format 0_1 without SRI fields, or power control of PUSCH by SRI. If the setting of is not provided to the UE, the UE may use the RS resource index q _d with the ID of the zero path loss reference RS.

For PUSCH transmissions set by a configured grant setting (eg, ConfiguredGrantConfig), if the configured grant setting includes a given parameter (eg, rrc-CofiguredUplinkGrant), then the RS resource index by the pathloss reference index (eg, pathlossReferenceIndex) within the given parameter. q _d may be provided to the UE.

For the PUSCH transmission set by the configuration grant setting, if the configuration grant setting does not include a given parameter, the UE will RS from the value of the ID of the path loss reference RS mapped to the SRI field in the DCI format that activates the PUSCH transmission. The resource index q _d may be determined. If the DCI format does not include an SRI field, the UE may determine an RS resource index q _d with an ID of zero path loss reference RS.

The equations (1), (2), and (3) are merely examples and are not limited to these. The user terminal may control the transmission power of the PUSCH based on at least one parameter exemplified by the equations (1), (2), and (3), and may include additional parameters. The parameter of the part may be omitted. Further, in the above equations (1) and (2), the transmission power of the PUSCH is controlled for each active UL BWP of a carrier of a certain serving cell, but the present invention is not limited to this. At least a part of the serving cell, carrier, BWP, and power control adjustment state may be omitted.

<Transmission power control for PUCCH>
Further, in NR, the transmission power of PUCCH is the TPC command (value, increase / decrease value, correction value), indicated value indicated by the value of a predetermined field (also referred to as TPC command field, first field, etc.) in DCI. , Etc.).

For example, the transmission of the PUCCH at the transmission occasion (also referred to as the transmission period) i for the active UL BWP b of the carrier f of the serving cell c using the index l of the power control adjustment state. The electric power ( _PPUCCH _{, b, f, c} (i, qu, q _d , l)) may be expressed by the following equation (4).

The power control adjustment state may be referred to as a PUCCH power control adjustment state, a first or second state, or the like.

Further, the PUCCH transmission opportunity i is a predetermined period during which the PUCCH is transmitted, and may be composed of, for example, one or more symbols, one or more slots, and the like.

In the formula (4), the _{PCMAX, f, c} (i) are also referred to as, for example, the transmission power (maximum transmission power, UE maximum output power, etc.) of the user terminal set for the carrier f of the serving cell c at the transmission opportunity i. ). _{PO_PUCCH} _{, b, f, c} (qu) are, for example, parameters related to the target received power set for the active UL BWP b of the carrier f of the serving cell c in the transmission opportunity i (for example, parameters related to the transmission power offset, etc.). It is also referred to as a transmission power offset P0 or a target reception power parameter).

M ^PUCCH _{RB, b, f, c} (i) is, for example, the number of resource blocks (bandwidth) allocated to the PUCCH for the transmission opportunity i in the active UL BWP b of the serving cell c and the carrier f with the subcarrier interval μ. .. PL _{b, f, c} (q _d ) is, for example, an index of a reference signal (path loss reference RS, DL RS for path loss measurement, PUCCH-Pathloss Reference RS) for downlink BWP associated with the active UL BWP b of the carrier f of the serving cell c. It is a path loss calculated by the user terminal using q _d .

_{ΔF_PUCCH} (F) is an upper layer parameter given for each PUCCH format. _{ΔTF, b, f, c} (i) are transmission power adjustment components (offsets) for UL BWP b of the carrier f of the serving cell c.

g _{b, f, c} (i, l) are values based on the TPC command of the power control adjustment state index l of the active UL BWP b of the carrier f of the serving cell c and the transmission opportunity i (for example, the power control adjustment state, TPC). Cumulative value of commands, value by closed loop, PUCCH power adjustment state). For example, g _{b, f, c} (i, l) may be expressed by the equation (5).

In equation (5), δ _{punch, b, f, c} (m, l) is the value of the TPC command in DCI (eg DCI format 1_0 or 1_1) and has DCI (eg DCI format 2_2). Encoded with other TPC commands in PDCCH. The Σδ _{command, b, f, c} (m, l) is a K _punch of the PUCCH transmission opportunity i- ₀ on the active UL BWP b of the PUCCH power control adjustment state l, the serving cell c and the carrier f of the subcarrier interval μ. (Ii ₀ ) A set of TPC command values with cardinality c (C _i ) received by the UE between before the -1 symbol and before the K _punch (i) symbol of the PUCCH transmission opportunity i. It is the total of TPC commands in _Ci . Here, i ₀ > 0 is the smallest integer in which the K _punch (i-i ₀ ) -1 symbol of the PUCCH transmission opportunity i- ₀ is faster than the K _punch (i) symbol of the PUCCH transmission opportunity i. be.

If the UE is provided with information (twoPUCCH-PC-AdjustmentStates) indicating that the two PUCCH power control adjustment states are used, and PUCCH spatial relation information (PUCCH-SpatialRelationInfo), l = {0,1}. , If the UE is not provided with information indicating that the two PUCCH power control adjustment states are used, or the PUCCH spatial relationship information, l = 0 may be set.

If the UE obtains the TPC command value from the DCI format 1_0 or 1-11 and the UE is provided with PUCCH spatial relation information, the UE will use the P0 ID for PUCCH (p0-Set in PUCCH-PowerControl in PUCCH-Config). The index provided by p0-PUCCH-Id) in may provide a mapping between the PUCCH spatial relationship information ID (pucch-SpatialRelationInfoId) value and the closedLoopIndex (power adjustment state index l). When the UE receives an activation command containing the value of the PUCCH spatial relationship information ID, the UE may determine the value of the closed loop index that provides the value of l through the link to the corresponding P0 ID for PUCCH. ..

If the UE provides a setting of _{PO_PUCCH, b, f, c} (q) values for the corresponding PUCCH power adjustment state l for the active _UL BWP b of carrier f in the serving cell c, then g _{b, f, c} (i, l) = 0, k = 0, 1, ..., I. If the UE is provided with PUCCH spatial relationship information, the UE is based on the PUCCH spatial relationship information associated with the PUCCH _P0 ID corresponding to qu and the closed loop index value corresponding to l. The value of l may be determined from the value of _u .

q _u may be a PUCCH P0 ID (p0-PUCCH-Id) indicating a PUCCH P0 (P0-PUCCH) in the PUCCH P0 set (p0-Set).

Note that equations (4) and (5) are merely examples and are not limited to these. The user terminal may control the transmission power of the PUCCH based on at least one parameter exemplified by the equations (4) and (5), may include additional parameters, or may include some parameters. It may be omitted. Further, in the above equations (4) and (5), the transmission power of the PUCCH is controlled for each active UL BWP of a carrier of a certain serving cell, but the present invention is not limited to this. At least a part of the serving cell, carrier, BWP, and power control adjustment state may be omitted.

<Transmission power control for SRS>
For example, the transmission of SRS at the SRS transmission occasion (also referred to as transmission period) i for the active UL BWP b of the carrier f of the serving cell c using the index l of the power control adjustment state. The electric power ( _{PSRS, b, f, c} (i, q _s , l)) may be expressed by the following equation (6).

The power control adjustment state may be referred to as an SRS power control adjustment state, a value based on the TPC command, a cumulative value of the TPC command, a closed loop value, a first or second state, or the like. .. l may be referred to as a closed loop index.

Further, the SRS transmission opportunity i is a predetermined period during which the SRS is transmitted, and may be composed of, for example, one or more symbols, one or more slots, and the like.

In equation (6), _{PCMAX, f, c} (i) is, for example, the maximum UE output power for the carrier f of the serving cell c in the SRS transmission opportunity i. _{PO_SRS, b, f, c} (q _s ) are provided by p0 for the active UL BWP b of the carrier f of the serving cell c and the SRS resource set q _s (provided by the SRS-ResourceSet and SRS-ResourceSetId). It is a parameter related to the target received power (for example, a parameter related to the transmission power offset, a transmission power offset P0, a target reception power parameter, or the like).

M _{SRS, b, f, c} (i) is an SRS bandwidth represented by the number of resource blocks for the SRS transmission opportunity i on the active UL BWP b of the carrier f of the serving cell c and the subcarrier interval μ.

α _{SRS, b, f, c} (q _s ) are provided by α (eg, alpha) for the active UL BWP b of the carrier f of the serving cell c and the subcarrier spacing μ, and the SRS resource set q _s .

PL _{b, f, c} (q _d ) are the DL path loss estimates [dB] calculated by the UE using the RS resource index q _d for the active DL BWP of the serving cell c and the SRS resource set q _s . ]. The RS resource index q _d is a path loss reference RS (provided by a path loss measurement DL RS, eg pathlossReference RS) associated with the SRS resource set q _s , and is an SS / PBCH block index (eg, ssb-Index). Alternatively, it is a CSI-RS resource index (for example, csi-RS-Index).

h _{b, f, c} (i, l) are SRS power control adjustment states for the active UL BWP of the carrier f of the serving cell c and the SRS transmission opportunity i. If the SRS power control adjustment state settings (eg, srs-PowerControlAdjustmentStates) indicate the same power control adjustment state for SRS and PUSCH transmissions, the current PUSCH power control adjustment states f _{b, f, c} (i, l). ). On the other hand, if the SRS power control adjustment state setting indicates an independent power control adjustment state for SRS transmission and PUSCH transmission, and the TPC cumulative setting is not provided, then the SRS power control adjustment state h _{b, f, c} ( i) may be expressed by the formula (7).

In equation (7), δ _{SRS, b, f, c} (m) is a value determined according to the value of the TPC command in DCI (for example, DCI format 2_2 or 2_3), and is a value determined according to the value of the DCI (for example, DCI format 2_2). Or, in PDCCH having 2_3), it is encoded together with other TPC commands. Σδ _{SRS, b, f, c} (m) is the K _SRS (i-i ₀ ) -1 symbol of SRS transmission opportunity i-i ₀ on the active UL BWP b of the serving cell c and the carrier f with the subcarrier interval μ. The sum of the TPC commands in the set S _i of the TPC command values with cardinality c (S _i ) received by the UE between before and before the K _SRS (i) symbol of the SRS transmission opportunity i. be. Here, i ₀ > 0 is the smallest integer in which the K _SRS (i-i ₀ ) -1 symbol before the SRS transmission opportunity i-i ₀ is faster than the K _SRS (i) symbol before the SRS transmission opportunity i. be.

If the SRS power control adjustment state setting indicates a separate (separate) power control adjustment state for SRS and PUSCH transmissions and a cumulative value of TPC commands is provided, then the SRS power control adjustment state h _{b, f, c} (i) may be expressed by the equation (8).

Note that equations (6), (7), and (8) are merely examples and are not limited to these. The user terminal may control the transmission power of the SRS based on at least one parameter exemplified by the equations (6), (7), and (8), and may include additional parameters. The parameter of the part may be omitted. Further, in the above equations (6), (7), and (8), the transmission power of SRS is controlled for each BWP of a certain carrier of a certain cell, but the present invention is not limited to this. At least a part of the cell, carrier, BWP, and power control adjustment state may be omitted.

As shown in the equations (2), (5), and (7), for example, when the cumulative value of the TPC command is not provided to the UE, the TPC command value included in the DCI is controlled in the control of the transmission power of the PUSCH, PUCCH, and SRS. Power adjustment is performed using the power control adjustment state based on the total.

However, the link between two or more PDCCH candidates is not explicit, and the UE may not know that the PDCCH candidates are linked (eg, repeated) before decoding. When the power control adjustment state is the sum of the TPC command values in two or more PDCCH candidates having a plurality of iterations including the TPC command (for example, equations (2), (5), (7)), the UE is that. It is necessary to calculate the TPC command value only once per multiple iterations. However, how the UE knows the linkage between PDCCH candidates after decryption has not been fully investigated.

If the link between the PDCCH candidates cannot be known, the UE cannot properly calculate the power control adjustment state, and can properly calculate the transmission power of the uplink (PUSCH, PUCCH, SRS). It may not be possible. For example, the UE may add the same TPC command value more than once.

Therefore, the present inventors receive and specify a DCI including a specific field relating to the repetition of the physical downlink control channel (PDCCH) including the downlink control information (DCI) and transmission power control information (for example, a TPC command). Based on the field of, I came up with a terminal that applies transmission power control information to the calculation of transmission power. According to one aspect of the present disclosure, the power control adjustment state can be appropriately calculated.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The wireless communication methods according to each embodiment may be applied individually or in combination. In the present disclosure, "A / B" may be read as "at least one of A and B".

In the present disclosure, PDCCH repetitive transmission, repetitive PDCCH, repetitive transmission, and a plurality of PUSCH transmissions may be read as each other. Further, the repeat, continuous symbol, transport block, PDCCH, PDCCH candidate, Control Channel Element (CCE), Resource Element Group (REG), and Resource Element (RE) may be read as each other.

In the present disclosure, the TPC command, the value of the TPC command, and the value determined according to the value of the TPC command may be read as each other.

In the present disclosure, a beam, a spatial domain filter, a spatial setting, a TCI state, an UL TCI state, a unified TCI state, a QCL assumption, a QCL parameter, a spatial domain receive filter, a UE spatial domain receive filter, a UE receive beam, and a DL beam. , DL receive beam, DL precoding, DL precoder, DL-RS, TCI state / QCL assumed QCL type D RS, TCI state / QCL assumed QCL type A RS, spatial relationship, spatial domain transmission filter, UE space The domain transmission filter, UE transmission beam, UL beam, UL transmission beam, UL precoding, UL precoder, PL-RS may be read as each other. In the present disclosure, the QCL type X-RS, the DL-RS associated with the QCL type X, the DL-RS having the QCL type X, the source of the DL-RS, the SSB, the CSI-RS, and the SRS may be read as each other. good.

In the present disclosure, a panel, an Uplink (UL) transmission entity, a TRP, a spatial relationship, a control resource set (COntrol REsource SET (CORESET)), a PDSCH, a code word, a base station, and an antenna port of a certain signal (for example, a reference signal for demodulation). (DeModulation Reference Signal (DMRS) port), antenna port group of a certain signal (for example, DMRS port group), group for multiplexing (for example, Code Division Multiplexing (CDM) group, reference signal group, The CORESET group), the CORESET pool, the CW, the redundant version (redundancy version (RV)), and the layers (MIMO layer, transmission layer, spatial layer) may be read as each other. Further, the panel Identifier (ID) and the panel may be read as each other. In the present disclosure, TRP ID and TRP may be read as each other.

In the present disclosure, a single TRP, a channel using a single TRP, a channel using one TCI state / spatial relationship, a multi-TRP not enabled by RRC / DCI, and multiple TCI states / spatial relationships enabled by RRC / DCI. Not to be set, no CORESETPoolIndex value of 1 is set for any CORESET, and no code point in the TCI field is mapped to two TCI states may be read as mutually exclusive. ..

In the present disclosure, a multi-TRP, a channel using a multi-TRP, a channel using a plurality of TCI states / spatial relationships, a multi-TRP being enabled by RRC / DCI, and a plurality of TCI states / spatial relationships being enabled by RRC / DCI. At least one of the multi-TRP based on the single DCI and the multi-TRP based on the multi-DCI may be read as each other. In the present disclosure, setting a CORESET pool index (CORESETPoolIndex) value of 1 for a multi-TRP and CORESET based on a multi-DCI may be read as interchangeable with each other. In the present disclosure, the mapping of at least one code point of a single DCI-based multi-TRP, TCI field to two TCI states may be read interchangeably.

(Wireless communication method)
The UE receives a DCI containing a specific field for repeating PDCCH including DCI and transmit power control information (TPC command), and depending on the specific field, sends a TPC command to transmit power (PUSCH / PUCCH / SRS). It may be applied to the calculation of transmission power). When the UE receives a plurality of PDCCH repetitions having the same TPC command, the UE may apply the value of the TPC command only once per the plurality of PDCCH repetitions (added to the transmission power or the power control adjustment state).

[Aspect 1]
The DCI may include a specific field (eg, 1 bit) indicating whether the PDCCH iteration containing the DCI is the first iteration. The UE may determine that the DCI TPC command is new if the PDCCH iteration containing DCI is the first iteration.

FIG. 1 is a diagram showing an example of PDCCH repetition in aspect 1. In FIG. 1, it is assumed that a specific 1-bit field X is included in the DCI. If X = 0, it is not the first PDCCH repeat, but if X = 1, it is the first PDCCH repeat.

In the present disclosure, the "first" may mean the first in the time direction or the first in the frequency direction. For example, in FIG. 1, the time axis is shown, but the axis in FIG. 1 may show the frequency axis. The same applies to other drawings. In the present disclosure, the field may be an index indicating the smallest (or largest) CCE / RE / REG.

[Aspect 2]
The DCI may include a specific field indicating the order of the PDCCH iterations containing the DCI. The number of bits in the field may be determined based on the number of iterations. The UE may determine that the DCI TPC command is new if the PDCCH iteration containing DCI is the first iteration.

FIG. 2 is a diagram showing an example of PDCCH repetition in aspect 2. In FIG. 2, a 2-bit specific field X is included in the DCI, where X indicates the order in the PDCCH iteration.

[Aspect 3]
The DCI may include a specific field indicating whether the DCI (DCI in the PDCCH iteration) contains new transmit power control information (TPC command). This field may be a dedicated field to indicate whether the PDCCH iteration contains a new TPC command. The UE determines if a DCI contains a new TPC command based on a particular field, similar to the behavior of determining if new data has been scheduled based on the new data indicator (NDI) field. May be good.

For example, the value of a particular field in DCI in the current PDCCH is the same as the value of a particular field in DCI that contains the last (previously) detected TPC command (the particular field was not toggled). Not toggled)), the UE determines that the TPC command in the current PDCCH (DCI) is repeatable. For example, the value of a particular field in DCI in the current PDCCH is different from the value of a particular field in DCI that contains the last (immediately before) detected TPC command (the specific field was toggled). If so, the UE determines that the TPC command in the current PDCCH (DCI) is new.

FIG. 3 is a diagram showing an example of PDCCH repetition in aspect 3. In FIG. 3, when a particular field X of DCI in PDCCH is switched (toggle) from 0 to 1, the UE determines that the TPC command in that PDCCH is the new TPC command. If a particular field X of DCI in PDCCH is not switched, the UE determines that the TPC command in that PDCCH is repeatable.

[Aspect 4]
The DCI may include a specific field indicating whether the PDCCH iteration contains a new TPC command. This field may be an existing field (a field that is also used for other purposes). The UE may determine that the TPC command is repeated (not a new TPC command) if at least one of the following conditions (1) and (2) is satisfied.

(1) Target (PDSCH / PUSCH / reference signal (Reference signal (RS) / transport block (TB)) and resource (frequency / time resource) scheduled by PDCCH (DCI in PDCCH) including TPC command. ) Is the same as the target and resource scheduled by the previously detected PDCCH.

(2) The value of the field in the PDCCH (DCI in the PDCCH) containing the TPC command is the same as the value of the field in the previously detected PDCCH. The field may be all fields of DCI, may be a combination of one or more fields of DCI, or may be a field other than the field related to timing.

FIG. 4 is a diagram showing an example of PDCCH repetition in aspect 4. In FIG. 4, when the above condition (1) is applied, since the scheduling targets (PDSCH) and resources of PDCCH repetition # 1 and # 2 are the same, the UE determines that the TPC command is repeated. Alternatively, when the above condition (2) is applied and the fields of (2) are HARQ process number and New data indicator (NDI), the values of PDCCH repeat # 1 and # 2 are the same, so that the UE is a TPC. Determines that the command is repeatable.

When the UE determines that the TPC command is repeated, it adds only the TPC command (+ 1 dB) to the power control adjustment state.

FIG. 5 is a diagram showing an example in the case of retransmitting the PDSCH in the fourth aspect. In the example shown in FIG. 5, PDCCH # 1 schedules the first PDSCH and PDCCH # 2 schedules the retransmitted PDSCH. In this case, the UE may determine that the TPC command is not repeated regardless of the conditions (1) and (2) above. Then, the UE adds both the TPC command (+ 1 dB) of PDCCH # 1 and the TPC command (+ 1 dB) of PDCCH # 2 to the power control adjustment state.

[Power control adjustment status]
The calculation of the case where the power control adjustment state of PDSCH / PDCCH / SRS is the sum of the values of the TPC commands (for example, equations (2), (5), and (7)) will be described. When the UE receives multiple PDCCH repetitions (one set of PDCCH repetitions) having the same TPC command, the UE applies the value of the TPC command only once for each of the multiple PDCCH repetitions (added to the transmission power or power control adjustment state). You may. That is, the UE does not overlap and calculate the same TPC command value.

FIG. 6A is a diagram showing an example of a power control adjustment state when the first aspect is applied. In the example shown in FIG. 6A, the UE adds the power adjustment control states when the particular field X is 1 (first iteration) and X is 0 (not the first iteration). , The power adjustment control state may be controlled so as not to be added. In this case, the UE adds + 1 dB + 2 dB to the power adjustment control state.

According to the first aspect, since the specific field may have a small number of bits (for example, 1 bit), the UE can appropriately calculate the power control adjustment state with a small DCI overhead regardless of the number of PDCCH iterations.

FIG. 6B is a diagram showing an example of a power control adjustment state when the second aspect is applied. In the example shown in FIG. 6B, the UE adds the power adjustment control state when the specific field X is 00 (when it is the first iteration), and when X is other than 00 (when it is not the first iteration). ), The power adjustment control state may be controlled so as not to be added. In this case, the UE adds + 1 dB + 2 dB to the power adjustment control state.

It is assumed that the TPC command for each PDCCH repeat is the same. Therefore, according to aspect 2, the UE can properly calculate the power control adjustment state even if one of the PDCCH iterations is lost.

FIG. 6C is a diagram showing an example of the power control adjustment state when the aspect 3 is applied. In the example shown in FIG. 6C, the UE adds the power adjustment control state if the value in a particular field is different from the previous value (if it is the first iteration), and the value in the particular field is the same as the previous value. If (when it is not the first repetition), the power adjustment control state may be controlled so as not to be added. In this case, the UE adds + 1 dB + 2 dB to the power adjustment control state.

According to the third aspect, the number of PDCCH repetitions can be flexibly set. Further, the UE can appropriately calculate the power control adjustment state with a small DCI overhead regardless of the number of PDCCH iterations.

The UE may know the link between PDCCHs before decryption. For example, if the UE knows that multiple PDCCH iterations have the same TPC command, it applies the TPC command value only once per multiple PDCCH iterations, as in each of the above examples (transmission power or). It may be added to the power control adjustment state).

[others]
In each of the above embodiments, the presence of a particular field in DCI may be set by higher layer signaling (eg, RRC). Further, the control of each aspect may be applied to at least one transmission power control of PUSCH, PUCCH, and SRS. The control of each aspect may be applied to the TPC command in at least one of DCI formats 0_0, 0_1, 1_0, 1_1, 2_2, 2_3.

The specific field of each aspect may be applied when the cumulative value (tpc-accumulation) of the TPC command is provided to the UE, or may be applied when it is not provided. Certain fields may not be applied if the power control adjustment state is absolute. In this case, the same value indicating the power control adjustment state is shown in each PDCCH repetition, and the ambiguity disappears.

The UE may report a UE capability indicating at least one of the following (1) to (3).
(1) Whether to support PDCCH repetition including TPC command.
(2) Whether to support PDCCH repetition for which no explicit link between PDCCH is shown.
(3) Whether an explicit link between PDCCHs is not shown and PDCCH iterations including TPC commands are supported.

The control of each of the above embodiments may be applied when at least one of the following (1) and (2) is carried out.
(1) The UE reported the UE capability for each aspect of control.
(2) The UE has set the upper layer parameters related to the control of each mode.

(Wireless communication system)
Hereinafter, the configuration of the wireless communication system according to the embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using any one of the wireless communication methods according to each of the above-described embodiments of the present disclosure or a combination thereof.

FIG. 7 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..

Further, the wireless communication system 1 may support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs). MR-DC is a dual connectivity (E-UTRA-NR Dual Connectivity (EN-DC)) between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR, and a dual connectivity (NR-E) between NR and LTE. -UTRA Dual Connectivity (NE-DC)) may be included.

In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is MN, and the base station (eNB) of LTE (E-UTRA) is SN.

The wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) May be supported.

The wireless communication system 1 includes a base station 11 that forms a macrocell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macrocell C1 and forms a small cell C2 that is narrower than the macrocell C1. You may prepare. The user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

The user terminal 20 may be connected to at least one of a plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) and dual connectivity (DC) using a plurality of component carriers (Component Carrier (CC)).

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)). The macrocell C1 may be included in FR1 and the small cell C2 may be included in FR2. For example, FR1 may be in a frequency band of 6 GHz or less (sub 6 GHz (sub-6 GHz)), and FR 2 may be in a frequency band higher than 24 GHz (above-24 GHz). The frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

Further, the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

The plurality of base stations 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the higher-level station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to a relay station (relay) is IAB. It may be called a node.

The base station 10 may be connected to the core network 30 via another base station 10 or directly. The core network 30 may include at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).

The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

In the wireless communication system 1, a wireless access method based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, at least one of the downlink (Downlink (DL)) and the uplink (Uplink (UL)), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple. Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

The wireless access method may be called a waveform. In the wireless communication system 1, another wireless access system (for example, another single carrier transmission system, another multi-carrier transmission system) may be used as the UL and DL wireless access systems.

In the wireless communication system 1, as downlink channels, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), and a downlink control channel (Physical Downlink Control) shared by each user terminal 20 are used. Channel (PDCCH)) and the like may be used.

Further, in the wireless communication system 1, as the uplink channel, the uplink shared channel (Physical Uplink Shared Channel (PUSCH)), the uplink control channel (Physical Uplink Control Channel (PUCCH)), and the random access channel shared by each user terminal 20 are used. (Physical Random Access Channel (PRACH)) or the like may be used.

User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH. User data, upper layer control information, and the like may be transmitted by the PUSCH. Further, the Master Information Block (MIB) may be transmitted by the PBCH.

Lower layer control information may be transmitted by PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH.

The DCI that schedules PDSCH may be called DL assignment, DL DCI, or the like, and the DCI that schedules PUSCH may be called UL grant, UL DCI, or the like. The PDSCH may be read as DL data, and the PUSCH may be read as UL data.

A control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used for PDCCH detection. CORESET corresponds to a resource for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates). One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space based on the search space settings.

One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. The "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", etc. of the present disclosure may be read as each other.

Depending on the PUCCH, channel state information (Channel State Information (CSI)), delivery confirmation information (for example, it may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.) and scheduling request (Scheduling Request). Uplink Control Information (UCI) including at least one of SR)) may be transmitted. The PRACH may transmit a random access preamble for establishing a connection with the cell.

In this disclosure, downlinks, uplinks, etc. may be expressed without "links". Further, it may be expressed without adding "Physical" to the beginning of various channels.

In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted. In the wireless communication system 1, the DL-RS includes a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation). Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.

The synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)). The signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like. In addition, SS, SSB and the like may also be called a reference signal.

Further, in the wireless communication system 1, even if a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), or the like is transmitted as an uplink reference signal (Uplink Reference Signal (UL-RS)). good. The DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal).

(base station)
FIG. 8 is a diagram showing an example of the configuration of the base station according to the embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140. The control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.

In this example, the functional block of the characteristic portion in the present embodiment is mainly shown, and it may be assumed that the base station 10 also has 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 composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.

The control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping) and the like. The control unit 110 may control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140. The control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.

The transmission / reception 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 transmitter / receiver 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on the common recognition in the technical field according to the present disclosure. be able to.

The transmission / reception unit 120 may be configured as an integrated transmission / reception 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 receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

The transmitting / receiving antenna 130 can be composed of an antenna described based on the common recognition in the technical field according to the present disclosure, for example, an array antenna.

The transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like. The transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.

The transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

The transmission / reception unit 120 (transmission processing unit 1211) processes, for example, Packet Data Convergence Protocol (PDCP) layer processing and Radio Link Control (RLC) layer processing (for example, RLC) for data, control information, etc. acquired from control unit 110. RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.

The transmission / reception unit 120 (transmission processing unit 1211) performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted. Processing (if necessary), inverse Fast Fourier Transform (IFFT) processing, precoding, transmission processing such as digital-analog transform may be performed, and the baseband signal may be output.

The transmission / reception unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. ..

On the other hand, the transmission / reception unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 130.

The transmission / reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) for the acquired baseband signal. )) Processing (if necessary), filtering, decoding, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.

The transmission / reception unit 120 (measurement unit 123) may perform measurement on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal. The measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)). , Signal strength (for example, Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), and the like may be measured. The measurement result may be output to the control unit 110.

The transmission line interface 140 transmits / receives signals (backhaul signaling) to / from a device included in the core network 30, another base station 10, etc., and user data (user plane data) for the user terminal 20 and a control plane. Data or the like may be acquired or transmitted.

The transmission unit and the reception unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

Note that the transmission / reception unit 120 may transmit the downlink control information including the specific field related to the repetition of the physical downlink control channel including the downlink control information and the transmission power control information to the terminal.

(User terminal)
FIG. 9 is a diagram showing an example of the configuration of the user terminal according to the embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. The control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.

In this example, the functional block of the feature portion in the present embodiment is mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.

The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.

The control unit 210 may control signal generation, mapping, and the like. The control unit 210 may control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 220.

The transmission / reception 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 transmitter / receiver 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on the common recognition in the technical field according to the present disclosure.

The transmission / reception unit 220 may be configured as an integrated transmission / reception 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 receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

The transmitting / receiving antenna 230 can be composed of an antenna described based on the common recognition in the technical field according to the present disclosure, for example, an array antenna.

The transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like. The transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.

The transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

The transmission / reception unit 220 (transmission processing unit 2211) processes, for example, PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , HARQ retransmission control), etc., to generate a bit string to be transmitted.

The transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed to output a baseband signal.

Whether or not to apply the DFT process may be based on the transform precoding setting. When the transform precoding is enabled for a channel (for example, PUSCH), the transmission / reception unit 220 (transmission processing unit 2211) transmits the channel using the DFT-s-OFDM waveform. The DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.

The transmission / reception unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 230. ..

On the other hand, the transmission / reception unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 230.

The transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.

The transmission / reception unit 220 (measurement unit 223) may perform measurement on the received signal. For example, the measuring unit 223 may perform RRM measurement, CSI measurement, or the like based on the received signal. The measuring unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like. The measurement result may be output to the control unit 210.

The transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230.

The transmission / reception unit 220 may receive the downlink control information including the specific field related to the repetition of the physical downlink control channel including the downlink control information and the transmission power control information.

The control unit 210 may apply the transmission power control information to the calculation of the transmission power based on the specific field. The particular field may indicate whether the iteration of the physical downlink control channel containing the downlink control information is the first iteration. The particular field may indicate the repetitive order of the physical downlink control channel containing the downlink control information. The particular field may indicate whether the downlink control information within the iteration of the physical downlink control channel includes the new transmit power control information.

(Hardware configuration)
The block diagram used in the description of the above embodiment shows a block of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

Here, the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. Not limited. For example, a functional block (configuration unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like. In each case, as described above, the realization method is not particularly limited.

For example, the base station, user terminal, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. FIG. 10 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment. The base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. ..

In this disclosure, the terms of devices, circuits, devices, sections, units, etc. can be read as each other. 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 figure, or may be configured not to include some of the devices.

For example, although only one processor 1001 is shown, there may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors. The processor 1001 may be mounted by one or more chips.

For each function in the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), and the like may be realized by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks.

The memory 1002 is a computer-readable recording medium, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, and is, for example, a flexible disk, a floppy disk (registered trademark) disk, an optical magnetic disk (for example, a compact disc (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, etc.). At least one of Blu-ray® discs), removable discs, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers and other suitable storage media. May be configured by. The storage 1003 may be referred to as an auxiliary storage device.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 has, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). May be configured to include. For example, the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like described above may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be physically or logically separated by the transmission unit 120a (220a) and the reception unit 120b (220b).

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information. The bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.

Further, the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.

(Modification example)
The terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, channels, symbols and signals (signals or signaling) may be read interchangeably. Also, the signal may be a message. The reference signal may be abbreviated as RS, and may be referred to as a pilot, a pilot signal, or the like depending on the applied standard. Further, the component carrier (CC) may be referred to as a cell, a frequency carrier, a carrier frequency, or the like.

The wireless frame may be configured by one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may be referred to as a subframe. Further, the subframe may be composed of one or more slots in the time domain. The subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.

Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel. Numerology is, for example, subcarrier interval (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, wireless frame configuration. , A specific filtering process performed by the transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.

The slot may be composed of one or more symbols in the time area (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.). Further, the slot may be a time unit based on numerology.

The slot may include a plurality of mini slots. Each minislot may be composed of one or more symbols in the time domain. Further, the mini slot may be referred to as a sub slot. The minislot may consist of a smaller number of symbols than the slot. A PDSCH (or PUSCH) transmitted in a time unit larger than the mini slot may be referred to as a PDSCH (PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.

The wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal. The radio frame, subframe, slot, minislot and symbol may use different names corresponding to each. The time units such as frames, subframes, slots, mini-slots, and symbols in the present disclosure may be read as each other.

For example, one subframe may be called TTI, a plurality of consecutive subframes may be called TTI, and one slot or one minislot may be called TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. May be. The unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units. The definition of TTI is not limited to this.

TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation. When a TTI is given, the time interval (for example, the number of symbols) to which the transport block, code block, code word, etc. are actually mapped may be shorter than the TTI.

When one slot or one mini slot is called TTI, one or more TTIs (that is, one or more slots or one or more mini slots) may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like. A TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.

The long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (eg, shortened TTI, etc.) may be read as a TTI less than the TTI length of the long TTI and 1 ms. It may be read as TTI having the above TTI length.

A resource block (Resource Block (RB)) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. The number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers contained in the RB may be determined based on numerology.

Further, the RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe or 1 TTI. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.

In addition, one or more RBs are 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, and an RB. It may be called a pair or the like.

Further, the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)). For example, 1RE may be a radio resource area of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (which may also be called partial bandwidth) represents a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. May be good. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

The BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL). One or more BWPs may be set in one carrier for the UE.

At least one of the configured BWPs may be active and the UE may not expect to send or receive a given signal / channel outside the active BWP. In addition, "cell", "carrier" and the like in this disclosure may be read as "BWP".

Note that the above-mentioned structures such as wireless frames, subframes, slots, mini-slots, and symbols are merely examples. For example, the number of subframes contained in a radio frame, the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB. The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

Further, the information, parameters, etc. described in the present disclosure may be expressed using an absolute value, a relative value from a predetermined value, or another corresponding information. It may be represented. For example, the radio resource may be indicated by a given index.

The names used for parameters, etc. in this disclosure are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those expressly disclosed in the present disclosure. Since the various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are not limiting in any way. ..

The information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

In addition, information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers. Information, signals, etc. may be input / output via a plurality of network nodes.

Input / output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, signals, etc. can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.

The notification of information is not limited to the embodiment / embodiment described in the present disclosure, and may be performed by using another method. For example, the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and higher layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals or combinations thereof. May be carried out by.

The physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like. Further, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like. Further, MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).

In addition, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).

The determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).

Software, whether called software, firmware, middleware, microcode, hardware description language, or other names, instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.

Further, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

The terms "system" and "network" used in this disclosure may be used interchangeably. The "network" may mean a device (eg, a base station) included in the network.

In the present disclosure, "precoding", "precoder", "weight (precoding weight)", "pseudo-colocation (Quasi-Co-Location (QCL))", "Transmission Configuration Indication state (TCI state)", "space". "Spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", Terms such as "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel" are compatible. Can be used for

In this disclosure, "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access point", "Transmission point (Transmission Point (TP))", "Reception point (Reception Point (RP))", "Transmission / reception point (Transmission / Reception Point (TRP))", "Panel" , "Cell", "sector", "cell group", "carrier", "component carrier" and the like may be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (eg, 3) cells. When a base station accommodates multiple cells, the entire base station coverage area can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio). Communication services can also be provided by Head (RRH))). The term "cell" or "sector" refers to part or all of the coverage area of at least one of a base station and a base station subsystem that provides communication services in this coverage.

In this disclosure, terms such as "mobile station (MS)", "user terminal", "user equipment (UE)", and "terminal" are used interchangeably. Can be done.

Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.

At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, a mobile body itself, or the like. The moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

Further, the base station in the present disclosure may be read by the user terminal. For example, the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the user terminal 20 may have the function of the base station 10 described above. Further, words such as "up" and "down" may be read as words corresponding to communication between terminals (for example, "side"). For example, the upstream channel, the downstream channel, and the like may be read as a side channel.

Similarly, the user terminal in the present disclosure may be read as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

In the present disclosure, the operation performed by the base station may be performed by its upper node (upper node) in some cases. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal are a base station, one or more network nodes other than the base station (for example,). Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or may be switched and used according to the execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.

Each aspect / embodiment described in the present disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system ( 4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a fraction)), Future Radio Access (FRA), New -Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB) , LTE 802.11 (Wi-Fi®), LTE 802.16 (WiMAX®), LTE 802.20, Ultra-WideBand (UWB), Bluetooth®, and other suitable radios. It may be applied to a system using a communication method, a next-generation system extended based on these, and the like. Further, a plurality of systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).

The statement "based on" used in this disclosure does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

The term "determining" used in this disclosure may include a wide variety of actions. For example, "judgment (decision)" means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment".

Further, "judgment (decision)" includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as "determining" such as accessing) (for example, accessing data in memory).

In addition, "judgment (decision)" is regarded as "judgment (decision)" such as resolution, selection, selection, establishment, and comparison. May be good. That is, "judgment (decision)" may be regarded as "judgment (decision)" of some action.

Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.

The "maximum transmission power" described in the present disclosure may mean the maximum value of the transmission power, may mean the nominal UE maximum transmit power, or may mean the rated maximum transmission power (the). It may mean rated UE maximum transmit power).

The terms "connected", "coupled", or any variation thereof, as used in the present disclosure, are any direct or indirect connections or connections between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are "connected" or "bonded" to each other. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access".

In the present disclosure, when two elements are connected, one or more wires, cables, printed electrical connections, etc. are used, and as some non-limiting and non-comprehensive examples, the radio frequency domain, microwaves. It can be considered to be "connected" or "coupled" to each other using frequency, electromagnetic energy having wavelengths in the region, light (both visible and invisible) regions, and the like.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". The term may mean that "A and B are different from C". Terms such as "separate" and "combined" may be interpreted in the same way as "different".

When "include", "including" and variations thereof are used in the present disclosure, these terms are as inclusive as the term "comprising". Is intended. Moreover, the term "or" used in the present disclosure is intended not to be an exclusive OR.

In the present disclosure, if articles are added by translation, for example, a, an and the in English, the disclosure may include the plural nouns following these articles.

Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as an amended or modified mode without departing from the spirit and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for purposes of illustration and does not bring any limiting meaning to the invention according to the present disclosure.

Claims

A receiver that receives the downlink control information, including specific fields related to the repetition of the physical downlink control channel including the downlink control information, and transmission power control information.
A control unit that applies the transmission power control information to the calculation of the transmission power based on the specific field.
Terminal with.
The terminal according to claim 1, wherein the specific field indicates whether the iteration of the physical downlink control channel containing the downlink control information is the first iteration.
The terminal according to claim 1, wherein the specific field indicates an order of repetition of the physical downlink control channel including the downlink control information.
The terminal according to claim 1, wherein the specific field indicates whether the downlink control information in the repetition of the physical downlink control channel includes the new transmission power control information.
The process of receiving the downlink control information including the specific field related to the repetition of the physical downlink control channel including the downlink control information and the transmission power control information, and the process of receiving the downlink control information.
A step of applying the transmission power control information to the calculation of the transmission power based on the specific field, and
The wireless communication method of the terminal having.
It has a transmitter that transmits the downlink control information including the specific field related to the repetition of the physical downlink control channel including the downlink control information and the transmission power control information to the terminal.
In the terminal, the transmit power control information is applied to the calculation of transmit power based on the particular field.
A base station characterized by that.