WO2020031324A1 - User equipment and wireless communication method - Google Patents

Abstract

User equipment comprises: a receiving unit that receives a measurement signal in a first component carrier (CC) in a band; and a control unit that is set to measure the reception power of the measurement signal in the first CC and that, if the measurement signal is not transmitted in a second CC in the band, is set to measure at least one of the reception strength and the reception quality in the second CC. According to an aspect of the present disclosure, it is possible to appropriately acquire at least one of the reception strength and the reception quality in a carrier in which no measurement signal is transmitted.

Description

User terminal and wireless communication method

The present disclosure relates to a user terminal and a wireless communication method in a next-generation mobile communication system.

In a UMTS (Universal Mobile Telecommunications System) network, long term evolution (LTE: Long Term Evolution) has been specified for the purpose of higher data rates and lower delays (Non-Patent Document 1). Also, LTE-A (LTE Advanced, LTE @ Rel. 10, 11, 12, 13) has been specified for the purpose of further increasing the capacity and sophistication of LTE (LTE @ Rel. 8, 9).

Succession system of LTE (for example, FRA (Future Radio Access), 5G (5th generation mobile communication system), 5G + (plus), NR (New Radio), NX (New radio access), FX (Future generation radio access), LTE Rel. 14 or 15 or later) are also being studied.

In an existing LTE system (for example, LTE@Rel.8-13), a user terminal (UE: User @ Equipment) detects a synchronization signal (SS: Synchronization @ Signal) and a network (for example, a base station (eNB: eNode @ B)). ) And identify the cell to be connected (for example, by cell ID (Identifier)). Such a process is also called a cell search. The synchronization signal includes, for example, PSS (Primary @ Synchronization @ Signal) and / or SSS (Secondary @ Synchronization @ Signal).

Further, the UE receives broadcast information (for example, a master information block (MIB: Master Information Block), a system information block (SIB: System Information Block), etc.), and sets information (system information) for communication with the network. May be called).

The MIB may be transmitted on a broadcast channel (PBCH: Physical Broadcast Channel), and the SIB may be transmitted on a downlink (DL) shared channel (PDSCH: Physical Downlink Shared Channel).

In a future wireless communication system (for example, 3GPP Rel. 15 or later, also referred to as NR, 5G, 5G +, etc.), measurement using a synchronization signal block (SSB: Synchronization Signal Block) is used.

In the measurement using the SSB, for example, based on the received power (for example, SS-RSRP: Synchronization signal reference signal received received power) and received signal strength (for example, RSSI: Received Signal Strength Indicator) of the synchronization signal, It is envisaged to determine the reception quality (eg SS-RSRQ: Synchronization signal reference signal signal received quality).

Also, support for carriers that do not transmit SSB (for example, Component Carrier: CC) is being considered. However, if the reception quality of the carrier to which the measurement signal is not transmitted cannot be properly obtained, the performance of the system may be deteriorated.

Therefore, an object of the present disclosure is to provide a user terminal and a wireless communication method that appropriately acquire reception quality in a carrier to which a measurement signal is not transmitted.

A user terminal according to one aspect of the present disclosure is configured to: a receiving unit that receives a measurement signal on a first component carrier (CC) in one band, and set a measurement of reception power of the measurement signal in the first CC; A control unit configured to set at least one measurement of reception strength and reception quality in the second CC when the measurement signal is not transmitted in the second CC in the band.

According to an embodiment of the present disclosure, it is possible to appropriately acquire at least one of the reception strength and the reception quality of a carrier to which a measurement signal is not transmitted.

FIG. 1 is a diagram illustrating an example of in-band CA using a CC to which SSB is transmitted and a CC to which SSB is not transmitted. FIG. 2 is a diagram illustrating an example of RSRQ measurement in a CC to which SSB is transmitted and a CC to which SSB is not transmitted. FIG. 3 is a diagram illustrating an example of a schematic configuration of the wireless communication system according to the embodiment. FIG. 4 is a diagram illustrating an example of the entire configuration of the base station according to the embodiment. FIG. 5 is a diagram illustrating an example of a functional configuration of the base station according to the embodiment. FIG. 6 is a diagram illustrating an example of the overall configuration of the user terminal according to the embodiment. FIG. 7 is a diagram illustrating an example of a functional configuration of the user terminal according to the embodiment. FIG. 8 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the embodiment.

<Measurement>
In future wireless communication systems (eg, 3GPP Rel. 15 or later, also referred to as NR, 5G, 5G +, etc.), the following measurements are being considered:
(1) Intra-frequency measurement without MG (MG: Measurement Gap) unnecessary,
(2) Intra-frequency measurement with MG required for MG,
(3) Inter-frequency measurement.

内 The above-mentioned (1) in-frequency measurement that does not require MG is also called in-frequency measurement that does not require RF retuning. The above-described (2) in-frequency measurement that requires MG is also called in-frequency measurement that requires RF retuning. For example, when the signal to be measured is not included in the band of the active BWP (BandWidth @ Part), RF retuning is necessary even in the same frequency measurement, and thus the measurement of (2) is performed.

In the measurement gap (MG: Measurement @ Gap), the user terminal switches (retunes) the used frequency (RF: Radio @ Frequency) from the serving carrier to the non-serving carrier, measures using a reference signal or the like, and then measures the used frequency. Switch from non-serving carrier to serving carrier.

Here, BWP corresponds to one or more partial frequency bands in a component carrier (CC: Component Carrier, carrier, cell, NR carrier) set to NR. BWP may be called a partial frequency band, a partial band, or the like. The BWP may include at least one of a downlink BWP (DL @ BWP) and an uplink BWP (UL @ BWP).

間 The inter-frequency measurement of the above (3) is also called a different frequency measurement. It is assumed that the different frequency measurement uses MG. However, the UE sets the UE capability (UE capability) of the gapless measurement (gapless measurement) to a base station (for example, a BS (Base Station), a transmission / reception point (TRP: Transmission / Reception Point), an eNB (eNodeB), and a gNB (NR). NodeB) or the like), it is possible to perform different frequency measurement without MG.

In 同 NR, while measuring the same frequency carrier or different frequency carrier using MG, transmission and reception in the serving cell cannot be performed because RF is switched.

In at least one of the same-frequency measurement and the different-frequency measurement in LTE, NR, and the like, a reference signal reception power (RSRP: Reference Signal Received Power), a received signal strength (RSSI: Received Signal Strength Indicator) of the non-serving carrier, and a reference signal At least one of reception quality (RSRQ: Reference Signal Received Quality) and SINR (Signal to Interference plus Noise Ratio) may be measured.

Here, RSRP is the received power of the desired signal, and is at least a cell-specific reference signal (CRS: Cell-specific Reference Signal), a channel state information reference signal (CSI-RS: Channel State Information-Reference Signal), or the like. Measured using one. RSSI is the total received power including the received power of the desired signal and the interference and noise power. RSRQ is the ratio of RSRP to RSSI.

The desired signal may be a signal included in a synchronization signal block (SSB: Synchronization Signal Block). The SSB is a signal block including a synchronization signal (SS: Synchronization @ Signal) and a broadcast channel (also referred to as a broadcast signal, PBCH, NR-PBCH, etc.), and may be called an SS / PBCH block or the like.

SS may include PSS (PrimaryrimSynchronization Signal), SSS (Secondary Synchronization Signal), NR-PSS, NR-SSS, and the like. The SSB is composed of one or more symbols (for example, OFDM symbols). In the SSB, the PSS, the SSS, and the PBCH may be arranged in one or more different symbols. For example, the SSB may be configured by a total of four or five symbols including one symbol PSS, one symbol SSS, and two or three symbols of the PBCH.

測定 In addition, the measurement performed using SS (or SSB) may be referred to as SS (or SSB) measurement. As the SS (or SSB) measurement, for example, SS-RSRP, SS-RSSI, SS-RSRQ, SS-SINR measurement, or the like may be performed.

By the way, the user terminal determines a received signal strength (for example, SS-RSRP: Synchronization signal reference signal received received power) and a received signal strength in the NR carrier (for example, RSSI: Received Signal Strength Indicator, NR carrier RSSI). It is assumed that the reception quality of the synchronization signal (for example, SS-RSRQ: Synchronization signal reference signal received quality) is determined.

For example, SS-SRRQ may be defined as follows.
SS-RSRQ = N × SS-RSRP / NR Carrier RSSI
Here, N may be the number of resource blocks included in the maximum bandwidth (maximum allowable bandwidth or measurement bandwidth) in which measurement of the NR carrier RSSI is allowed.

SS-RSRP is defined by a linear average over the power contributions of the resource elements transmitting the synchronization signal (SS). A time resource for SS-RSRP measurement may be defined within the SMTC window period. The SS-RSRP may be measured only between reference signals corresponding to SS / PBCH blocks in the same SS / PBCH block index and the same physical layer cell ID (Physical-layer @ cell @ identity). If the higher layer indicates an SS / PBCH block for performing SS-RSRP measurement, the SS-RSRP may be measured in the indicated SS / PBCH block. Note that SS-RSRP may be measured using at least one of PSS, SSS, and another signal (for example, CSI-RS).

The NR carrier RSSI constitutes a linear average of the total received power in the OFDM symbol with the measurement time resource and the measurement bandwidth. The measurement bandwidth may be composed of N resource blocks. The NR carrier RSSI may include interference and thermal noise from all sources, including co-channel serving and non-serving cells. A time resource for measuring the NR carrier RSSI may be defined within the SMTC window period.

NR carrier RSSI is being studied for measurement in SS / PBCH blocks, similar to SS-RSRP. That is, the maximum allowable bandwidth for measuring the NR carrier RSSI is being considered to be the SS / PBCH block bandwidth (for example, 20 PRB), like the SS-RSRP measurement bandwidth.

<RSRQ setting>
The UE transmits an information element (Information Element: IE) indicating a measurement target (MeasObjectNR) by higher layer signaling for RSRQ (SS-RSRQ) measurement using SSB, RSRQ using CSI-RS (CSI-RSRQ), and the like. It may be set.

The measurement target includes at least one of an SSB frequency (ssbFrequency), an SSB subcarrier interval (ssbSubcarrierSpacing), an SSB measurement timing setting (SSB-based measurement measurement timing configuration: SSB-MTC or SMTC), and a reference signal setting (referenceSignalConfig). May be. ssbFrequency indicates the center frequency of SSB. ssbSubcarrierSpacing indicates an SSB subcarrier interval. SMTC indicates the SSB measurement timing (cycle, offset, time length, etc.).

ReferenceSignalConfig may include at least one of SSB configuration for mobility (ssb-ConfigMobility) and CSI-RS resource configuration for mobility (csi-rs-ResourceConfigMobility). The UE can set whether to use SSB or CSI-RS as a reference signal for measurement by referenceSignalConfig.

Ssb-ConfigMobility may include at least one of measurement SSB (ssb-ToMeasure), synchronization serving cell timing (useServingCellTimingForSync), and SS-RSSI measurement (SS-RSSI-Measurement). ssb-ToMeasure indicates a set of SSB measured within the SMTC measurement period. ssb-ToMeasure indicates the SSB measured by the bitmap corresponding to the SSB index. useServingCellTimingForSync indicates whether to use the serving cell timing to derive the index of the SSB transmitted by the neighboring cell for the same frequency measurement (whether the neighboring cell and the serving cell are synchronized). SS-RSSI-Measurement sets RSSI measurement based on a synchronization reference signal (synchronization signal in SSB). SS-RSSI-Measurement may indicate at least one (time resource) of a slot and a symbol for performing SS-RSSI measurement.

The above-mentioned mobility CSI-RS resource configuration (csi-rs-ResourceConfigMobility) may include at least one of a subcarrier interval (subcarrierSpacing) and a mobility CSI-RS cell list (csi-RS-CellList-Mobility). . csi-RS-CellList-Mobility is a list of CSI-RS cells for mobility (CSI-RS-CellMobility).

CSI-RS-CellMobility is a cell ID (cellId), a CSI-RS measurement bandwidth (csi-rs-MeasurementBW), a density (density), and a CSI-RS resource list for mobility (csi-rs-ResourceList-Mobility). At least one may be included. The csi-rs-MeasurementBW may include the number of PRBs in the measurement band (nrofPRBs) and the start PRB of the measurement band (startPRB). density may indicate the frequency domain density of the one-port CSI-RS for L3 mobility. csi-rs-ResourceList-Mobility is a list of CSI-RS resources for mobility (CSI-RS-Resource-Mobility).

CSI-RS-Resource-Mobility includes CSI-RS index (csi-RS-Index), slot configuration (slotConfig), associated SSB (associated SSB), frequency domain allocation (frequencyDomainAllocation), first OFDM symbol in time domain (firstOFDMSymbolInTimeDomain), Sequence generation configuration (sequenceGenerationConfig) may be included. associatedSSB indicates an SSB associated with the CSI-RS resource, and may include an SSB index and presence / absence of QCL (Quasi-Co-Located).

<When using CC that does not transmit SSB>
Some CCs in intra-band CA (Carrier Aggregation) are being studied to support operation without SSB transmission. The problem is how the UE performs RRM (Radio Resource Management) measurement in a CC where SSB is not transmitted.

The following scenarios 1 and 2 are assumed as scenarios using CCs without SSB (SSB is not transmitted).

<Scenario 1>
As shown in FIG. 1, there is a CC having an SSB (a SSB is transmitted) in the same band as a CC having no SSB, and a CC having no SSB and a CC having an SSB are the same base station. Operated in a co-located location.

同期 Synchronization, RSRP, etc. are almost the same among a plurality of CCs in the same band operated at the same base station position. The UE performs at least one of the synchronization and the RSRP measurement on the CC having the SSB, so that the activation / deactivation of the cell of the other CC can be flexibly performed, and the RSRP of the other CC can be performed. There is no need to measure. In addition, since the base station does not perform SSB transmission on some CCs, it is possible to reduce overhead of SSB transmission. Further, since the UE does not need to measure the RSRP in each CC, the measurement load can be reduced.

<Scenario 2>
UE performs RRM measurement using CSI-RS instead of SSB.

In this case, even if a plurality of CCs are not operated at the same base station position (even if they are operated at different base station positions), the CSI-RS is transmitted on each CC, so that the UE can obtain the quality of each CC. (RSRP, RSRQ, etc.). The base station can manage the quality of each CC and can assign an appropriate CC (cell) to each UE.

In Scenario 1, it can be assumed that RSRPs are substantially the same among a plurality of CCs in a band. On the other hand, the traffic-dependent interference amount may differ depending on the CC. This case is a case where the base station distributes a plurality of UEs to a plurality of CCs. For example, in FIG. 1, there is a case where the traffic of CC # 0 is large (congested) and the traffic of CC # 1 is small (vacant).

It is conceivable that the base station distributes traffic by determining which CC to connect the UE to based on a measurement result including the amount of interference such as RSRQ and SINR. However, in scenario 1 and scenario 2, when a measurement signal (SSB, CSI-RS) is transmitted in each CC in order to obtain a measurement result including the interference amount of each CC, transmission overhead of the measurement signal increases.

Therefore, the present inventors have studied a method for suppressing an overhead for measuring at least one of reception strength and reception quality in a carrier to which a measurement signal is not transmitted, and have reached the present invention.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings.

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

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

に お い て In the present disclosure, a cell, a serving cell, a carrier, and a CC may be read interchangeably. In the present disclosure, the measurement signal, the reference signal, the synchronization signal, the SSB, and the CSI-RS may be interchanged.

(Embodiment)
If the UE has been configured for RSRP measurement using a measurement signal (reference signal) in at least one CC (first CC) in one band, the UE may be configured on a CC (second CC) in which measurement signals in that band are not transmitted. An RSRQ measurement may be configured. The measurement signal may be at least one of SSB and CSI-RS.

For example, if SS-RSRP measurement is configured in at least one first CC in one band, the UE may be configured for SS-RSRQ measurement in a second CC in which SSB in the band is not transmitted.

The UE may measure the RSRP at the first CC, measure the RSSI at the second CC, and calculate the RSRQ of the second CC based on the RSRP of the first CC and the RSSI of the second CC.

When the SS-RSRQ in the second CC is set, the UE may use the SS-RSRP measured in the first CC in the calculation of the SS-RSRQ. In other words, when the SS-RSRQ in the second CC is set, the UE may regard the SS-RSRP of the first CC as the SS-RSRP of the second CC.

When the SS-RSRQ in the second CC is set, the UE uses the SS-RSSI measured in the specific band in the second CC in calculating the SS-RSRQ.

The specific band may be all or a part of the band of the active DL BWP in the second CC. The specific band may be a band centered on a designated frequency (for example, ssbFrequency) and having a predetermined bandwidth (for example, 20 PRB). The predetermined bandwidth may be the same as the bandwidth of the measurement signal (SSB or CSI-RS). The specific band may be a band having at least one of the center frequency and the bandwidth designated for RSSI measurement.

For example, as shown in FIG. 2, it is assumed that the UE performs in-band CA using CCs # 0 to # 5 in one band, and SSB is transmitted only in CC # 2 (first CC). The UE measures SS-RSRP using the SSB of CC # 2. The UE measures the SS-RSSI in each of CCs # 0 to # 5. The UE calculates the SS-RSRQ in CC # 2 based on the SS-RSRP in CC # 2 and the SS-RSSI in CC # 2. Further, the UE regards the SS-RSRP in CC # 2 as the SS-RSRP in other CCs (CC # 0, # 1, # 3, # 4, # 5). That is, the UE calculates SS-RSRQ in each CC based on SS-RSRP in CC # 2 and SS-RSSI in each CC.

According to this embodiment, when a plurality of CCs in one band are operated at the same base station position, the measurement signal (SSB or CSI-RS) is not transmitted in some CCs, thereby transmitting the measurement signal. Can be reduced, and the measurement load of RSRP in the UE can be reduced.

The UE can report the reception quality (RSRQ) even in the CC where the measurement signal is not transmitted. Thereby, even when a measurement signal is not transmitted in a part of a plurality of CCs, the base station can allocate a plurality of CCs to a plurality of UEs based on the reception quality depending on the traffic and distribute the traffic. it can.

Hereinafter, the details of the embodiment will be described. Each of the following contents may be applied alone or in combination.

<Method of instructing RSRQ measurement in CC where SSB is not transmitted>
The UE may be instructed to perform RSRQ measurement on a CC (second CC) where SSB is not transmitted according to one of the following RSRQ measurement instruction methods 1 to 3.

<< RSRQ measurement instruction method 1 >>
The UE may be explicitly indicated to be an SS-RSRQ measurement without SSB (SSB less SS-RSRQ measurement). For example, the upper layer signaling (MeasObjectNR) may include a 1-bit field to indicate SS-RSRQ measurement without SSB.

The UE may not be notified of ssbFrequency and ssbSubcarrierSpacing when explicitly instructed to perform SS-RSRQ measurement without SSB. In this case, MeasObjectNR may not include ssbFrequency and ssbSubcarrierSpacing.

The UE may be notified of the RSSI measurement band (center frequency, bandwidth) by another higher layer signaling, may use a fixed RSSI measurement band defined in the specification, or may use a predetermined rule. The RSSI measurement band may be determined from specific parameters.

<< RSRQ measurement instruction method 2 >>
The UE may be implicitly indicated that the notified MeasObjectNR does not include the ssbSubcarrierSpacing, which is the SS-RSRQ measurement without the SSB.

Furthermore, the UE may be instructed on the center frequency of the RSSI measurement band by ssbFrequency included in MeasObjectNR. In other words, when MeasObjectNR does not include ssbSubcarrierSpacing, the UE may interpret that ssbFrequency included in MeasObjectNR indicates the center frequency of the RSSI measurement band.

The UE may be notified of the bandwidth of the RSSI measurement band by another higher layer signaling, may use a fixed bandwidth defined in the specification, or may use a predetermined rule to determine a bandwidth from a specific parameter. The width may be determined.

The bandwidth of the RSSI measurement band may be a fixed bandwidth defined in the specification. The fixed bandwidth may be 20 PRB (for example, the number of SSB PRBs) in the subcarrier interval (SubCarrier Spacing: SCS) of the data (PDSCH) of the serving cell (second CC).

帯 域 The bandwidth of the RSSI measurement band may be set by another higher layer signaling. An IE related to the RSSI measurement bandwidth may be added as another higher layer signaling.

<< RSRQ measurement instruction method 3 >>
Even if the UE is informed of all 0s (there is no SSB to be measured) as ssb-ToMeasure (bitmap), the UE may implicitly indicate that the UE is the SS-RSRQ measurement without the SSB. Good.

Furthermore, the UE may be instructed by ssbFrequency on the center frequency of the RSSI measurement band. Further, the UE may be instructed by the ssbSubcarrierSpacing on the SCS for determining the bandwidth of the RSSI measurement band. In other words, when ssb-ToMeasure is all 0, the UE may interpret that ssbFrequency indicates the center frequency of the RSSI measurement band, or that ssbSubcarrierSpacing indicates the SCS for determining the bandwidth of the RSSI measurement band. May be interpreted.

The UE may be notified of the bandwidth of the RSSI measurement band by another higher layer signaling, may use a fixed bandwidth defined in the specification, or may derive from a specific parameter using a predetermined rule. May be used.

The bandwidth of the RSSI measurement band may be a fixed bandwidth defined in the specification.

固定 The fixed number of PRBs in the RSSI measurement band may be defined in the specification. For example, the UE may determine the bandwidth from the SSB @ SCS specified by ssbSubcarrierSpacing and the fixed number of PRBs (for example, the number of PRBs of 20 PRBs and SSBs), or the SCS of the data of the serving cell (second CC). However, a fixed number of PRBs (for example, the number of PRBs of 20 PRBs and SSBs) may be determined as the bandwidth.

帯 域 The bandwidth of the RSSI measurement band may be set by another information element. Upper layer signaling (MeasObjectNR) may include an information element related to the bandwidth of the RSSI measurement band.

According to the RSRQ measurement instruction method described above, the UE can recognize that the RSRQ measurement is performed in the CC where the SSB is not transmitted, and the RSRQ measurement can be appropriately set.

<RSSI measurement method in CC where SSB is not transmitted>
The UE may measure the RSSI in the second CC according to one of the following RSSI measurement methods 1 to 3.

<< RSSI measurement method 1 >>
The UE may be explicitly notified of the center frequency and the bandwidth of the RSSI measurement band. Upper layer signaling may include an information element indicating a center frequency and a bandwidth of the RSSI measurement band.

The bandwidth may be notified by an absolute value (for example, in MHz). A plurality of combinations of the SCS and the number of PRBs are defined in the specification, and the UE may be notified of the index of one combination and determine the bandwidth based on the combination. At least one candidate for the number of SCSs and PRBs is specified in the specification, and the UE may be notified of the index of one candidate and determine the bandwidth based on the candidate. One value of the SCS and the number of PRBs may be specified in the specification, and the UE may be notified of the other value, and may determine the bandwidth from the notified value and the value specified in the specification.

<< RSSI measurement method 2 >>
The UE may be instructed by ssbFrequency on the center frequency of the RSSI measurement band. Further, the UE may use a fixed bandwidth specified in the specification for the RSSI measurement band, or may use a bandwidth derived from a specific parameter using a predetermined rule.

The bandwidth of the RSSI measurement band may be a fixed bandwidth defined in the specification.

固定 The fixed number of PRBs of the RSSI measurement band (for example, the number of PRBs of 20 PRBs and SSBs) may be defined in the specification. For example, the UE may determine the bandwidth from SSB SCS specified by ssbSubcarrierSpacing and a fixed number of PRBs.

MeasObjectNR may not include ssbSubcarrierSpacing. The UE may determine a fixed PRB number bandwidth for the SCS of the data of the serving cell (second CC). The UE may determine a fixed PRB number bandwidth for the SCS of the active DL @ BWP. The UE may determine a fixed PRB number bandwidth for SSB @ SCS of the first CC.

When the UE performs RSSI measurement (inter-frequency measurement) of a CC that is not a serving cell in the same band, the UE may determine a fixed number of PRBs for SSB @ SCS of the first CC. . That is, the UE can determine the bandwidth even in the case of the RSSI measurement of the CC for which the serving cell configuration (configuration, SCS of data) is not notified.

<< RSSI measurement method 3 >>
In the intra-frequency measurement, the UE may measure the RSSI in the RSSI measurement band in the active DL BWP of the CC whose RSSI is to be measured. RF retuning is not required for measurements within the active DL BWP.

The RSSI measurement band may depend on the UE implementation, or may be a fixed band defined in the specification. For example, the fixed band may be 20PRB (eg, SSB bandwidth) at the center of the active DL @ BWP.

According to the RSSI measurement method described above, the UE can appropriately set the RSSI measurement band, and can appropriately set the RSSI measurement even in a CC where SSB is not transmitted, in a different frequency measurement (a CC that is not a serving cell), and in the same frequency measurement. Can be done.

<RSSI measurement time resource>
The UE may be configured with a time resource (at least one of a slot and a symbol) for RSSI measurement by SS-RSSI-Measurement included in ssb-ConfigMobility.

If the UE does not set SS-RSSI-Measurement, the UE may use all symbols in the SMTC period (window) for RSSI measurement as a default.

<Reception beamforming>
The UE may use receive beamforming (BF) in the RSRP measurement and the RSSI measurement. Even when the UE performs the RSRP measurement and the RSSI measurement in one CC, the UE may perform the RSSI measurement using the same reception BF as the reception BF used for the RSRP measurement. The UE may perform the RSSI measurement using the same reception BF as the reception BF used for the RSRP measurement even when the CC for the RSRP measurement and the CC for the RSSI measurement are different. This allows the UE to perform RSSI measurement using an appropriate beam.

<Report contents>
The UE may calculate the RSRQ of the second CC using the RSRP of the first CC and the RSSI of the second CC, and report the RSRQ. The UE may report the RSRP of the first CC as the RSRP of the second CC, or may report the RSRP of the first CC and not report the RSRP of the second CC. The UE may report the RSSI of the second CC.

<Measurement using CSI-RS>
If the CSI-RSRP measurement is configured in at least one first CC in one band, the UE may be configured for CSI-RSRQ measurement in a second CC in which CSI-RS in the band is not transmitted.

When the UE measures RSRP using CSI-RS (CSI-RSRP) in at least one CC in one band, the UE may use the CSI-RSRP for RSRQ measurement of another CC.

ＳＳThe SSB in the measurement using the above-mentioned SSB (SS-RSRP, SS-RSSI, SS-RSRQ) may be replaced with CSI-RS. The UE may be instructed to perform the RSRQ measurement in the CC (second CC) in which the CSI-RS is not transmitted in the same manner as one of the above-described RSRQ measurement instruction methods 1 to 3. The UE may measure the RSSI in the second CC in the same manner as one of the RSSI measurement methods 1 to 3 described above.

For example, the UE may be explicitly instructed to be CSI-RSRQ measurement without CSI-RS (CSI-RS less CSI-RSRQ measurement) in the same manner as in the above-described RSRQ measurement instruction method 1. For example, upper layer signaling (MeasObjectNR) may include a 1-bit field indicating CSI-RSRQ measurement without CSI-RS.

The UE may be instructed to perform the CSI-RSRQ measurement without the CSI-RS by setting only the CSI-RS resource (CSI-RS-Resource-Mobility) including the CSI-RS index of the specific value. Good.

According to the measurement using the CSI-RS, the UE measures the CSI-RSRP in the first CC where the CSI-RS is transmitted, measures the CSI-RSSI in each CC, and calculates the CSI-RSRP in the first CC, It can be considered as CSI-RSRP in each CC. In addition, the UE can calculate CSI-RSRQ in the second CC where CSI-RS is not transmitted.

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

FIG. 3 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. In the wireless communication system 1, carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a unit of a system bandwidth (for example, 20 MHz) of an LTE system are applied. can do.

The wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G. (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system for realizing these.

The wireless communication system 1 includes a base station 11 forming a macro cell C1 having relatively wide coverage, and a base station 12 (12a to 12c) arranged in the macro cell C1 and forming a small cell C2 smaller than the macro cell C1. Have. Further, user terminals 20 are arranged in the macro cell C1 and each small cell C2. The arrangement, number, and the like of each cell and the user terminals 20 are not limited to the modes shown in the figure.

The user terminal 20 can be connected to both the base station 11 and the base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 simultaneously using CA or DC. Further, the user terminal 20 may apply CA or DC using a plurality of cells (CC).

Communication between the user terminal 20 and the base station 11 can be performed using a carrier having a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (also referred to as an existing carrier or a legacy carrier). On the other hand, between the user terminal 20 and the base station 12, a carrier having a relatively high frequency band (for example, 3.5 GHz, 5 GHz, or the like) and a wide bandwidth may be used, or between the user terminal 20 and the base station 11. The same carrier as described above may be used. Note that the configuration of the frequency band used by each base station is not limited to this.

The user terminal 20 can perform communication using time division duplex (TDD: Time Division Duplex) and / or frequency division duplex (FDD: Frequency Division Duplex) in each cell. In each cell (carrier), a single numerology may be applied, or a plurality of different numerologies may be applied.

Numerology may be a communication parameter applied to transmission and / or reception of a certain signal and / or channel, for example, subcarrier interval, bandwidth, symbol length, cyclic prefix length, subframe length. , TTI length, number of symbols per TTI, radio frame configuration, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the time domain, and the like. For example, for a certain physical channel, if the subcarrier intervals of the constituent OFDM symbols are different and / or if the number of OFDM symbols is different, the numerology may be referred to as different.

The base station 11 and the base station 12 (or between the two base stations 12) may be connected by wire (for example, an optical fiber or an X2 interface compliant with CPRI (Common Public Radio Interface)) or wirelessly. Good.

The base station 11 and each base station 12 are respectively connected to the upper station apparatus 30, and are connected to the core network 40 via the upper station apparatus 30. Note that the higher station apparatus 30 includes, for example, an access gateway apparatus, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto. Further, each base station 12 may be connected to the higher station apparatus 30 via the base station 11.

The base station 11 is a base station having relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like. The base station 12 is a base station having local coverage, such as a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), and a transmission / reception point. May be called. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as a base station 10.

Each user terminal 20 is a terminal corresponding to various communication systems such as LTE and LTE-A, and may include not only mobile communication terminals (mobile stations) but also fixed communication terminals (fixed stations).

In the wireless communication system 1, orthogonal frequency division multiple access (OFDMA: Orthogonal Frequency Division Multiple Access) is applied to the downlink as a wireless access method, and single carrier-frequency division multiple access (SC-FDMA: Single Carrier) is applied to the uplink. Frequency Division Multiple Access) and / or OFDMA is applied.

OFDMA is a multicarrier transmission scheme in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers), and data is mapped to each subcarrier for communication. SC-FDMA divides a system bandwidth into bands each composed of one or a continuous resource block for each terminal, and a single carrier transmission that reduces interference between terminals by using different bands for a plurality of terminals. It is a method. The uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.

In the wireless communication system 1, as a downlink channel, a downlink shared channel (PDSCH: Physical Downlink Shared Channel), a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel and the like shared by each user terminal 20 are used. Used. The PDSCH transmits user data, upper layer control information, SIB (System @ Information @ Block), and the like. Also, MIB (Master \ Information \ Block) is transmitted by PBCH.

Downlink L1 / L2 control channels include PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel) and the like. Downlink control information (DCI: Downlink Control Information) including scheduling information of PDSCH and / or PUSCH is transmitted by PDCCH.

Note that the DCI that schedules DL data reception may be called a DL assignment, and the DCI that schedules UL data transmission may be called an UL grant.

PCFICH transmits the number of OFDM symbols used for PDCCH. The PHICH transmits HARQ (Hybrid Automatic Repeat Repeat request) acknowledgment information (for example, retransmission control information, HARQ-ACK, ACK / NACK, etc.) for the PUSCH. The EPDCCH is frequency-division multiplexed with a PDSCH (Downlink Shared Data Channel) and used for transmission of DCI and the like like the PDCCH.

In the wireless communication system 1, as an uplink channel, an uplink shared channel (PUSCH: Physical Uplink Shared Channel), an uplink control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH: Physical Random Access Channel) or the like is used. By PUSCH, user data, higher layer control information, etc. are transmitted. In addition, downlink radio quality information (CQI: Channel Quality Indicator), acknowledgment information, scheduling request (SR: Scheduling Request), and the like are transmitted by PUCCH. The PRACH transmits a random access preamble for establishing a connection with a cell.

In the wireless communication system 1, as downlink reference signals, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), and a demodulation reference signal (DMRS: DeModulation Reference Signal, a position determination reference signal (PRS: Positioning Reference Signal), and the like are transmitted. In the wireless communication system 1, a reference signal for measurement (SRS: Sounding Reference Signal), a reference signal for demodulation (DMRS), and the like are transmitted as uplink reference signals. The DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal). Further, the transmitted reference signal is not limited to these.

<Base station>
FIG. 4 is a diagram illustrating an example of the entire configuration of the base station according to the embodiment. The base station 10 includes a plurality of transmitting / receiving antennas 101, an amplifier unit 102, a transmitting / receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106. Note that the transmitting / receiving antenna 101, the amplifier unit 102, and the transmitting / receiving unit 103 may be configured to include at least one each.

ユ ー ザ User data transmitted from the base station 10 to the user terminal 20 via the downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.

In the baseband signal processing unit 104, regarding user data, processing of a PDCP (Packet Data Convergence Protocol) layer, division / combination of user data, transmission processing of an RLC layer such as RLC (Radio Link Control) retransmission control, and MAC (Medium Access) Control) Transmission / reception control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, precoding processing, etc., and transmission / reception processing are performed. 103. The downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and is transferred to the transmission / reception unit 103.

The transmission / reception section 103 converts the baseband signal pre-coded and output from the baseband signal processing section 104 for each antenna into a radio frequency band, and transmits the radio frequency band. The radio frequency signal frequency-converted by the transmitting / receiving section 103 is amplified by the amplifier section 102 and transmitted from the transmitting / receiving antenna 101. The transmission / reception unit 103 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present disclosure. Note that the transmission / reception unit 103 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.

On the other hand, as for an uplink signal, a radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102. The transmitting / receiving section 103 receives the upstream signal amplified by the amplifier section 102. Transmitting / receiving section 103 frequency-converts the received signal into a baseband signal and outputs the baseband signal to baseband signal processing section 104.

The baseband signal processing unit 104 performs fast Fourier transform (FFT: Fast Fourier Transform), inverse discrete Fourier transform (IDFT), and error correction on user data included in the input uplink signal. Decoding, reception processing of MAC retransmission control, reception processing of the RLC layer and PDCP layer are performed, and the data is transferred to the upper station apparatus 30 via the transmission path interface 106. The call processing unit 105 performs call processing (setting, release, etc.) of a communication channel, state management of the base station 10, management of radio resources, and the like.

(4) The transmission path interface 106 transmits and receives signals to and from the higher-level station device 30 via a predetermined interface. The transmission line interface 106 transmits and receives signals (backhaul signaling) to and from another base station 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface). Is also good.

Note that the transmitting and receiving unit 103 may further include an analog beamforming unit that performs analog beamforming. The analog beamforming unit includes an analog beamforming circuit (for example, a phase shifter, a phase shift circuit) or an analog beamforming device (for example, a phase shifter) described based on common recognition in the technical field according to the present invention. May be. Further, the transmitting / receiving antenna 101 may be constituted by, for example, an array antenna.

FIG. 5 is a diagram illustrating an example of a functional configuration of a base station according to an embodiment of the present disclosure. In this example, functional blocks of characteristic portions in the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication.

The baseband signal processing unit 104 includes at least a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. Note that these configurations need only be included in base station 10, and some or all of the configurations need not be included in baseband signal processing section 104.

The control unit (scheduler) 301 controls the entire base station 10. The control unit 301 can be configured from a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present disclosure.

The control unit 301 controls, for example, signal generation in the transmission signal generation unit 302, signal assignment in the mapping unit 303, and the like. Further, the control unit 301 controls a signal reception process in the reception signal processing unit 304, a signal measurement in the measurement unit 305, and the like.

The control unit 301 performs scheduling (for example, resource transmission) of system information, a downlink data signal (for example, a signal transmitted on the PDSCH), and a downlink control signal (for example, a signal transmitted on the PDCCH and / or the EPDCCH; acknowledgment information and the like). Allocation). Further, control section 301 controls generation of a downlink control signal, a downlink data signal, and the like based on a result of determining whether or not retransmission control is required for an uplink data signal.

The control unit 301 controls scheduling of a synchronization signal (for example, PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)) and a downlink reference signal (for example, CRS, CSI-RS, and DMRS).

The control unit 301 includes an uplink data signal (for example, a signal transmitted on the PUSCH), an uplink control signal (for example, a signal transmitted on the PUCCH and / or PUSCH, acknowledgment information, etc.), a random access preamble (for example, a PRACH). (Transmission signal), scheduling of uplink reference signals and the like.

The control unit 301 controls to form a transmission beam and / or a reception beam using digital BF (for example, precoding) in the baseband signal processing unit 104 and / or analog BF (for example, phase rotation) in the transmission / reception unit 103. May be performed. The control unit 301 may perform control to form a beam based on downlink propagation path information, uplink propagation path information, and the like. These propagation path information may be acquired from the reception signal processing unit 304 and / or the measurement unit 305.

Transmission signal generation section 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from control section 301, and outputs the generated signal to mapping section 303. The transmission signal generation unit 302 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present disclosure.

The transmission signal generation unit 302 generates a DL assignment for notifying downlink data allocation information and / or a UL grant for notifying uplink data allocation information, based on an instruction from the control unit 301, for example. The DL assignment and the UL grant are both DCI and follow the DCI format. In addition, the downlink data signal is subjected to an encoding process and a modulation process according to an encoding rate, a modulation scheme, and the like determined based on channel state information (CSI: Channel \ State \ Information) from each user terminal 20 or the like.

Mapping section 303 maps the downlink signal generated by transmission signal generation section 302 to a predetermined radio resource based on an instruction from control section 301, and outputs the result to transmission / reception section 103. The mapping unit 303 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present disclosure.

(4) The reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, and decoding) on the reception signal input from the transmission / reception unit 103. Here, the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20. The reception signal processing unit 304 can be configured from a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present disclosure.

(4) The reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when a PUCCH including HARQ-ACK is received, HARQ-ACK is output to control section 301. Further, the reception signal processing unit 304 outputs the reception signal and / or the signal after the reception processing to the measurement unit 305.

The measurement unit 305 performs measurement on the received signal. The measurement unit 305 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present disclosure.

For example, the measurement unit 305 may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, or the like based on the received signal. Measuring section 305 receives power (for example, RSRP (Reference Signal Received Power)), reception quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio), SNR (Signal to Noise Ratio)). , Signal strength (for example, RSSI (Received Signal Strength Indicator)), channel information (for example, CSI), and the like may be measured. The measurement result may be output to the control unit 301.

<User terminal>
FIG. 6 is a diagram illustrating an example of the overall configuration of the user terminal according to the embodiment. The user terminal 20 includes a plurality of transmitting / receiving antennas 201, an amplifier unit 202, a transmitting / receiving unit 203, a baseband signal processing unit 204, and an application unit 205. Note that the transmitting / receiving antenna 201, the amplifier unit 202, and the transmitting / receiving unit 203 may be configured to include at least one each.

(4) The radio frequency signal received by the transmitting / receiving antenna 201 is amplified by the amplifier unit 202. The transmission / reception unit 203 receives the downlink signal amplified by the amplifier unit 202. The transmitting / receiving section 203 converts the frequency of the received signal into a baseband signal and outputs the baseband signal to the baseband signal processing section 204. The transmission / reception unit 203 can be configured from a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present disclosure. Note that the transmission / reception unit 203 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.

The baseband signal processing unit 204 performs FFT processing, error correction decoding, reception processing for retransmission control, and the like on the input baseband signal. The downlink user data is transferred to the application unit 205. The application unit 205 performs processing related to layers higher than the physical layer and the MAC layer. Also, of the downlink data, broadcast information may be transferred to the application unit 205.

On the other hand, uplink user data is input from the application unit 205 to the baseband signal processing unit 204. The baseband signal processor 204 performs retransmission control transmission processing (eg, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like, and performs transmission / reception processing. Transferred to 203.

(4) The transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits the radio frequency band. The radio frequency signal frequency-converted by the transmitting / receiving section 203 is amplified by the amplifier section 202 and transmitted from the transmitting / receiving antenna 201.

Note that the transmission / reception unit 203 may further include an analog beamforming unit that performs analog beamforming. The analog beamforming unit includes an analog beamforming circuit (for example, a phase shifter, a phase shift circuit) or an analog beamforming device (for example, a phase shifter) described based on common recognition in the technical field according to the present invention. May be. Further, the transmitting / receiving antenna 201 may be constituted by, for example, an array antenna.

(4) The transmission / reception unit 203 transmits and / or receives data in a cell included in a carrier to which SMTC is set. The transmission / reception unit 203 may receive information on the same frequency measurement and / or the different frequency measurement from the base station 10.

FIG. 7 is a diagram illustrating an example of a functional configuration of the user terminal according to the embodiment. Note that, in this example, functional blocks of characteristic portions in the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication.

The baseband signal processing unit 204 of the user terminal 20 includes at least a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. Note that these configurations need only be included in the user terminal 20, and some or all of the configurations need not be included in the baseband signal processing unit 204.

The control unit 401 controls the entire user terminal 20. The control unit 401 can be configured from a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present disclosure.

The control unit 401 controls, for example, signal generation in the transmission signal generation unit 402, signal assignment in the mapping unit 403, and the like. Further, the control unit 401 controls a signal reception process in the reception signal processing unit 404, a signal measurement in the measurement unit 405, and the like.

The control unit 401 acquires the downlink control signal and the downlink data signal transmitted from the base station 10 from the reception signal processing unit 404. The control unit 401 controls generation of an uplink control signal and / or an uplink data signal based on a result of determining whether or not retransmission control is required for a downlink control signal and / or a downlink data signal.

The control unit 401 controls to form a transmission beam and / or a reception beam using digital BF (for example, precoding) in the baseband signal processing unit 204 and / or analog BF (for example, phase rotation) in the transmission / reception unit 203. May be performed. The control unit 401 may perform control to form a beam based on downlink channel information, uplink channel information, and the like. These propagation path information may be acquired from the reception signal processing unit 404 and / or the measurement unit 405.

When the control unit 401 acquires various information notified from the base station 10 from the reception signal processing unit 404, the control unit 401 may update parameters used for control based on the information.

Transmission signal generation section 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on an instruction from control section 401 and outputs the generated signal to mapping section 403. The transmission signal generation unit 402 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present disclosure.

(4) The transmission signal generation unit 402 generates an uplink control signal related to acknowledgment information, channel state information (CSI), and the like based on an instruction from the control unit 401, for example. Further, transmission signal generating section 402 generates an uplink data signal based on an instruction from control section 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the downlink control signal notified from the base station 10 includes a UL grant.

Mapping section 403 maps the uplink signal generated by transmission signal generation section 402 to a radio resource based on an instruction from control section 401, and outputs the result to transmission / reception section 203. The mapping unit 403 can be configured from a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present disclosure.

(4) The reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, and decoding) on the reception signal input from the transmission / reception unit 203. Here, the received signal is, for example, a downlink signal (a downlink control signal, a downlink data signal, a downlink reference signal, etc.) transmitted from the base station 10. The reception signal processing unit 404 can be configured from a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present disclosure. In addition, the reception signal processing unit 404 can configure a reception unit according to the present disclosure.

(4) The reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401. The reception signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401. Further, the reception signal processing unit 404 outputs the reception signal and / or the signal after the reception processing to the measurement unit 405.

The measuring unit 405 measures the received signal. For example, the measurement unit 405 may perform the same frequency measurement and / or the different frequency measurement using SSB on one or both of the first carrier and the second carrier. The measurement unit 405 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present disclosure.

For example, the measurement unit 405 may perform RRM measurement, CSI measurement, and the like based on the received signal. The measurement unit 405 may measure reception power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), and channel information (for example, CSI). The measurement result may be output to the control unit 401.

The transmission / reception unit 203 may receive a measurement signal (eg, SSB, CSI-RS, etc.) on a first component carrier (CC) in one band.

The control unit 401 is configured to set the measurement of the reception power (for example, RSRP) of the measurement signal in the first CC, and when the measurement signal is not transmitted in the second CC in the band, the reception strength in the second CC (for example, , RSSI) measurement may be set.

The control unit 401 may report a reception quality (for example, RSRQ) based on the reception power measured in the first CC and the reception strength measured in the second CC.

The control unit 401 may determine whether the measurement signal is transmitted in the second CC based on higher layer signaling (for example, MeasObjectNR).

The control unit 401 controls at least one of upper layer signaling, a subcarrier interval of data in the second CC, a subcarrier interval of the measurement signal, and an active downlink partial band (for example, active DL @ BWP). Based on this, a band for measuring the reception intensity may be determined.

The measurement signal may be a synchronization signal block (for example, SSB, SS / PBCH block).

(Hardware configuration)
Note that the block diagram used in the description of the above embodiment shows a block of a functional unit. These functional blocks (configuration units) are realized by an arbitrary combination of at least one of hardware and software. In addition, a method of implementing each functional block is not particularly limited. That is, each functional block may be realized using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated). , Wired, wireless, etc.), and may be implemented using these multiple devices. The functional block may be implemented by combining one device or the plurality of devices with software.

Here, the functions include judgment, determination, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, 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) that causes transmission to function may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like. In any case, as described above, the realization method is not particularly limited.

For example, a base station, a user terminal, and the like according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method according to the present disclosure. FIG. 8 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the embodiment. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. .

In the present disclosure, the terms such as “apparatus”, “circuit”, “device”, “section”, and “unit” can be interchanged with 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 illustrated in the drawing, or may be configured to exclude some of the devices.

For example, although only one processor 1001 is illustrated, there may be multiple processors. Further, the processing may be executed by one processor, or the processing may be executed by two or more processors simultaneously, sequentially, or by using another method. Note that the processor 1001 may be implemented by one or more chips.

The functions of the base station 10 and the user terminal 20 are performed, for example, by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002 so that the processor 1001 performs an arithmetic operation and communicates via the communication device 1004. And controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, the above-described baseband signal processing unit 104 (204), call processing unit 105, and the like may be realized by the processor 1001.

The processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to 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 operation described in the above embodiment is used. For example, the control unit 401 of the user terminal 20 may be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks may be implemented similarly.

The memory 1002 is a computer-readable recording medium, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically EPROM), RAM (Random Access Memory), and other appropriate storage media. It may be constituted by one. The memory 1002 may be called 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, and the like that can be executed to execute the wireless communication method according to an embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc) ROM, etc.), a digital versatile disc, At least one of a Blu-ray (registered trademark) disk, a removable disk, a hard disk drive, a smart card, a flash memory device (eg, a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. May be configured. The storage 1003 may be called an auxiliary storage device.

The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). May be configured. For example, the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like may be realized by the communication device 1004. The transmission / reception unit 103 (203) may be mounted physically or logically separated between the transmission unit 103a (203a) and the reception unit 103b (203b).

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

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

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

(Modification)
Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meaning. 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 (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like according to an applied standard. A component carrier (CC: Component Carrier) may be called a cell, a frequency carrier, a carrier frequency, or the like.

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

Here, the new melology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology includes, for example, subcarrier interval (SCS: SubCarrier @ Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission @ Time @ Interval), number of symbols per TTI, radio frame configuration, transmission and reception. At least one of a specific filtering process performed by the transceiver in the frequency domain and a specific windowing process performed by the transceiver in the time domain may be indicated.

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

Slots may include multiple mini-slots. Each minislot may be constituted by one or more symbols in the time domain. Also, the mini-slot may be called a sub-slot. A minislot may be made up of a smaller number of symbols than slots. A PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be referred to as a PDSCH (PUSCH) mapping type B.

Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may have different names corresponding to each. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be interchanged with each other.

For example, one subframe may be called a transmission time interval (TTI: Transmission @ Time @ Interval), a plurality of consecutive subframes may be called a TTI, and one slot or one minislot is called a TTI. You may. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1 to 13 symbols), or a period longer than 1 ms. It may be. Note that the unit representing the TTI may be called a slot, a minislot, or the like instead of a subframe.

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

The 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 and link adaptation. Note that when a TTI is given, a time section (for example, the number of symbols) in which a transport block, a code block, a codeword, and the like are actually mapped may be shorter than the TTI.

If one slot or one minislot is called a TTI, one or more TTIs (ie, one or more slots or one or more minislots) may be the minimum time unit for scheduling. Further, the number of slots (mini-slot number) 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 LTE@Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, and the like. A TTI shorter than the normal TTI may be called 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.

Note that a long TTI (for example, a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (for example, a shortened TTI, etc.) may be replaced with a TTI shorter than the long TTI and 1 ms The TTI having the above-described TTI length may be replaced with the TTI.

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

Ｒ Also, the RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, and the like may each be configured by one or a plurality of resource blocks.

Note that one or more RBs include a physical resource block (PRB: Physical @ RB), a subcarrier group (SCG: Sub-Carrier @ Group), a resource element group (REG: Resource @ Element @ Group), a PRB pair, an RB pair, and the like. May be called.

{Also, a resource block may be composed of one or more resource elements (RE: Resource @ Element). For example, one RE may be a radio resource area of one subcarrier and one symbol.

A bandwidth part (BWP: Bandwidth @ Part) (which may be referred to as a partial bandwidth or the like) may also represent a subset of consecutive common RBs (common @ resource @ blocks) for a certain numerology in a certain carrier. Good. Here, the common RB may be specified by an index of the RB based on the common reference point of the carrier. A PRB may be defined by a BWP and numbered within the BWP.

$ BWP may include a BWP for UL (UL @ BWP) and a BWP for DL (DL @ BWP). For a UE, one or more BWPs may be configured in one carrier.

少 な く と も At least one of the configured BWPs may be active, and the UE does not have to assume to transmit and receive a given signal / channel outside the active BWP. Note that “cell”, “carrier”, and the like in the present disclosure may be replaced with “BWP”.

The structures of the above-described radio frame, subframe, slot, minislot, symbol, and the like are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, included in an RB The configuration of the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP: Cyclic @ Prefix) length, and the like can be variously changed.

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

名称 Names used for parameters and the like in the present disclosure are not limited in any respect. Further, the formulas and the like using these parameters may be different from those explicitly disclosed in the present disclosure. The various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements can be identified by any suitable name, so the various names assigned to these various channels and information elements Is not a limiting name in any way.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., that can be referred to throughout the above description are not limited to voltages, currents, electromagnetic waves, magnetic or magnetic particles, optical or photons, or any of these. May be represented by a combination of

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

(4) Information and signals input and output may be stored in a specific place (for example, a memory) or may be managed using a management table. Information and signals that are input and output can be overwritten, updated, or added. The output information, signal, and the like may be deleted. The input information, signal, and the like may be transmitted to another device.

Notification of information is not limited to the aspect / embodiment described in the present disclosure, and may be performed using another method. For example, the information is notified by physical layer signaling (for example, downlink control information (DCI: Downlink Control Information), uplink control information (UCI: Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, It may be implemented by broadcast information (master information block (MIB: Master Information Block), system information block (SIB: System Information Block), etc.), MAC (Medium Access Control) signaling), other signals, or a combination thereof.

Note that the physical layer signaling may be called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like. Further, the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like. Also, the MAC signaling may be notified using, for example, a MAC control element (MAC @ CE (Control @ Element)).

Further, the notification of the predetermined information (for example, the notification of “X”) is not limited to an explicit notification, and is implicit (for example, by not performing the notification of the predetermined information or by another information). May be performed).

The determination may be made by a value represented by 1 bit (0 or 1), or may be made by a boolean value represented by true or false. , May be performed by comparing numerical values (for example, comparison with a predetermined value).

Software, regardless of whether it is called software, firmware, middleware, microcode, a hardware description language, or any other name, instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules , Applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

ソ フ ト ウ ェ ア Also, software, instructions, information, and the like may be transmitted and received via a transmission medium. For example, if the 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.), the website, When transmitted from a server or other remote source, at least one of these wired and / or wireless technologies is included within the definition of a transmission medium.

用語 The terms “system” and “network” as used in this disclosure may be used interchangeably.

In the present disclosure, “precoding”, “precoder”, “weight (precoding weight)”, “quasi-co-location (QCL)”, “TCI state (Transmission Configuration Indication state)”, “spatial relation” (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 interchangeable Can be used for

In the present disclosure, “base station (BS: Base @ Station)”, “wireless base station”, “fixed station (fixed @ station)”, “NodeB”, “eNodeB (eNB)”, “gNodeB (gNB)”, “gNodeB (gNB)” "Access point (access @ point)", "transmission point (TP: Transmission @ Point)", "reception point (RP: Reception @ Point)", "transmission / reception point (TRP: Transmission / Reception @ Point)", "panel", "cell" , "Sector", "cell group", "carrier", "component carrier" and the like may be used interchangeably. A base station may also be referred to as a macro cell, a small cell, a femto cell, a pico cell, or the like.

A base station can accommodate one or more (eg, three) cells. If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH: Communication services can also be provided by Remote Radio Head)). 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 the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user equipment” (UE), and “terminal” may be used interchangeably. .

A mobile station is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal. , Handset, user agent, mobile client, client or some other suitable terminology.

少 な く と も At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. Note that at least one of the base station and the mobile station may be a device mounted on the mobile unit, the mobile unit itself, or the like. The moving object may be a vehicle (for example, a car, an airplane, or the like), may be an unmanned moving object (for example, a drone, an autonomous vehicle), or may be a robot (maned or unmanned). ). Note that at least one of the base station and the mobile station includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

基地 Also, the base station in the present disclosure may be replaced with a user terminal. For example, communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the configuration may be such that the user terminal 20 has 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, an uplink channel, a downlink channel, and the like may be replaced with a side channel.

Similarly, a user terminal in the present disclosure may be replaced by a base station. In this case, a configuration in which the base station 10 has the function of the user terminal 20 described above may be adopted.

In the present disclosure, the operation performed by the base station may be performed by an upper node (upper node) in some cases. In a network including one or more network nodes having a base station (network @ nodes), various operations performed for communication with a terminal include a base station, one or more network nodes other than the base station (eg, Obviously, it can be performed by MME (Mobility Management Entity), S-GW (Serving-Gateway) or the like, but not limited thereto, or a combination thereof.

各 Each aspect / embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching with execution. In addition, the order of the processing procedure, sequence, flowchart, and the like of each aspect / embodiment described in the present disclosure may be changed as long as there is no inconsistency. For example, for the methods described in this disclosure, elements of various steps are presented in an exemplary order, and are not limited to the specific order presented.

Each aspect / embodiment described in the present disclosure is applicable to LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication). system, 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (Registered trademark) (Global System for Mobile Communications), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802. 20, UWB (Ultra-WideBand), Bluetooth (registered trademark) , A system using other appropriate wireless communication methods, and a next-generation system extended based on these methods. Further, a plurality of systems may be combined (for example, a combination of LTE or LTE-A and 5G) and applied.

記載 The term “based on” as used in the present disclosure does not mean “based on” unless otherwise indicated. In other words, the phrase "based on" means both "based only on" and "based at least on."

い か な る Any reference to elements using designations such as "first," "second," etc., as used in this disclosure, does not generally limit the quantity or order of those elements. These designations may be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not mean that only two elements can be employed or that the first element must precede the second element in any way.

用語 The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, “judgment (decision)” means judging, calculating, computing, processing, deriving, investigating, searching (upping, searching, inquiry) ( For example, a search in a table, database, or another data structure), ascertaining, etc., may be regarded as "deciding".

Also, “determining” includes receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), and access ( accessing) (e.g., accessing data in a memory) or the like.

Also, “judgment (decision)” is regarded as “judgment (decision)” of resolving, selecting, selecting, establishing, comparing, and the like. Is also good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of any operation.

判断 Also, “judgment (decision)” may be read as “assuming”, “expecting”, “considering”, or the like.

The “maximum transmission power” described in the present disclosure may mean the maximum value of the transmission power, may mean the nominal maximum transmission power (the nominal UE maximum transmit power), or may refer to the rated maximum transmission power (the rated UE maximum transmit power).

As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements. And may include the presence of one or more intermediate elements between two elements "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.

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

に お い て In the present disclosure, the term “A and B are different” may mean that “A and B are different from each other”. The term may mean that “A and B are different from C”. Terms such as "separate", "coupled" and the like may be interpreted similarly to "different".

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

に お い て In the present disclosure, where articles are added by translation, for example, a, an, and the in English, the present disclosure may include that the nouns following these articles are plural.

Although the invention according to the present disclosure has been described in detail above, it is obvious 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 embodied as modifications and changes 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 intended for illustrative purposes and does not bring any restrictive meaning to the invention according to the present disclosure.

Claims (6)

1. A receiving unit that receives a measurement signal on a first component carrier (CC) in one band;
   When the measurement of the reception power of the measurement signal is set in the first CC and the measurement signal is not transmitted in the second CC in the band, at least one measurement of reception strength and reception quality in the second CC is set. And a control unit.
2. 2. The user terminal according to claim 1, wherein the control unit reports a reception quality based on the reception power measured on the first CC and the reception strength measured on the second CC. 3.
3. 3. The user terminal according to claim 1, wherein the control unit determines whether the measurement signal is transmitted in the second CC based on higher layer signaling. 4.
4. The controller, based on at least one of higher layer signaling, a subcarrier interval of data in the second CC, a subcarrier interval of the measurement signal, and an active downlink partial band, The user terminal according to claim 1, wherein the user terminal determines a measurement band.
5. The user terminal according to any one of claims 1 to 4, wherein the measurement signal is a synchronization signal block.
6. Receiving a measurement signal on a first component carrier (CC) in one band;
   When the measurement of the reception power of the measurement signal is set in the first CC and the measurement signal is not transmitted in the second CC in the band, at least one measurement of reception strength and reception quality in the second CC is set. And a wireless communication method for a user terminal.

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