Patent Description:
In the UMTS (Universal Mobile Telecommunications System) network, the specifications of Long Term Evolution (LTE) have been drafted for the purpose of further increasing high speed data rates, providing lower latency and so on (see Non-Patent Literature <NUM>). For the purpose of further high capacity, advancement of LTE (LTE Rel. <NUM>, Rel. <NUM>), and so on, the specifications of LTE-A (LTE-Advanced, LTE Rel. <NUM>, Rel. <NUM>, Rel. <NUM>, Rel. <NUM>) have been drafted.

Successor systems of LTE (referred to as, for example, "FRA (Future Radio Access)," "<NUM> (5th generation mobile communication system)," "<NUM>+ (plus)," "NR (New Radio)," "NX (New radio access)," "FX (Future generation radio access)," "LTE Rel. <NUM>," "LTE Rel. <NUM>" (or later versions), and so on) are also under study.

In existing LTE systems (for example, LTE Rel. <NUM> to Rel. <NUM>), a user terminal (UE (User Equipment)) detects a synchronization signal (SS), synchronizes with a network (for example, a base station (eNB: eNode B), and identifies a cell to which the user terminal is to connect (for example, using a cell ID (Identifier). Such processing is referred to as cell search. Examples of the synchronization signal include a PSS (Primary Synchronization Signal) and/or an SSS (Secondary Synchronization Signal).

A UE receives broadcast information (for example, master information block (MIBs), system information blocks (SIBs), and so on) to acquire configuration information for communication with the network (the information may also be referred to as system information).

MIBs may be transmitted on a broadcast channel (PBCH (Physical Broadcast Channel), and SIBs may be transmitted on a downlink (DL) shared channel (PDSCH (Physical Downlink Shared Channel).

In the 3GPP standard contribution entitled "Discussion on intra-frequency measurements requirement for NR" (R4-<NUM>), MediaTek Inc. discloses frequency measurements requirement without gap.

In the 3GPP standard contribution entitled "The principle of defining measurement requirements without gap sharing" (R4-<NUM>), NTT DOCOMO, INC. disclose that, for SSB-based measurements, the delay requirements can be scaled by SMTC periodicity and the number of carriers instead of gap sharing IE and provide various examples.

In the 3GPP standard contribution entitled "<NPL> et al. disclose open issues for intra-frequency measurement requirements and propose that intra-frequency measurement requirements for CA should be defined such that the measurement performance for carriers with PCell and PSCell (if configured) is not impacted due to measurement on carriers with SCells, the measurement performance for carriers with SCells may be scaled by a carrier-specific factor of K, where SMTC configuration on each serving carrier should be considered, and K is bounded to a maximum value Kmax.

In the 3GPP standard contribution entitled "D<NPL>. disclose requirements considering collision among RLM-RS, SMTC, and measurement gap, and propose that, regarding SSB based measurements, delay requirements can be scaled by SMTC based scaling factor instead of gap sharing IE, and the scaling factor could be applied for intra-frequency measurement with/without gap and inter-frequency measurement. The Scaling factor could be derived based on SMTC configuration and number of carriers.

In a future radio communication system (hereinafter also simply referred to as an NR), measurement using synchronization signal blocks (SSBs) is utilized. SSB-based measurement timing configuration (SMTC) is signaled to the UE. The UE performs, in a configured SMTC window, measurement based on an SSB to be measured.

In a case where intra-frequency measurement are performed in each of a plurality of carriers, the SMTC window may overlap among the plurality of carriers. In this case, when intra-frequency measurement is not appropriately performed, this may lead to degradation in communication throughput, frequency use efficiency, and so on.

Thus, an object of the present disclosure is to provide a user terminal and a radio communication method that can appropriately perform intra-frequency measurement in each of the plurality of carriers.

The present invention also provides a radio communication method for a terminal, in accordance with claim <NUM>.

The present invention also provides a system, in accordance with claim <NUM>.

According to the aspect of the present disclosure, the intra-frequency measurement can be appropriately performed in each of the plurality of carriers.

In existing LTE systems, a UE supports inter-frequency measurement in which the UE performs measurement in a non-serving carrier different from a serving carrier which serves to the UE.

At a measurement gap (MG), the UE switches a use frequency (RF) from the serving carrier to the non-serving carrier (retuning), perform measurement by using a reference signal and so on, and then switches the use frequency from the non-serving carrier to the serving carrier.

Here, the MG is a period when inter-frequency measurement are performed, and during the period, the UE stops transmissions/receptions in the carrier currently used for communication and performs measurement in a carrier of another frequency.

In LTE, while inter-frequency carriers are being measured by using MGs, transmissions/receptions in a serving cell are precluded due to switching of the RF. On the other hand, in other cases (for example, intra-frequency measurement), no transmission/reception constraint is imposed on the measurement.

In NR, the following measurements are under study:.

The intra-frequency measurement without MG in (<NUM>) described above are also referred to as intra-frequency measurement without RF retuning. The intra-frequency measurement with MG in (<NUM>) described above are also referred to as intra-frequency measurement with RF retuning. For example, in a case where a signal to be measured is not included in a band corresponding to an active bandwidth part (BWP), even intra-frequency measurement require RF retuning and thus correspond to the measurement in (<NUM>) described above.

Here, the BWP corresponds to one or more partial frequency bands in a component carrier (CC) configured in NR. The BWP may be referred to as a "partial frequency band," a "partial band," and the like.

The inter-frequency measurement in (<NUM>) described above are also referred to as inter-frequency measurement. The inter-frequency measurement are assumed to use MGs. However, in a case where the UE reports a UE capability of gap less measurement to a base station (also referred to as, for example, a BS, a transmission/reception point (TRP), an eNB (eNodeB), a gNB (NR NodeB), or the like), inter-frequency measurement without MGs are enabled.

In NR, while intra-frequency carriers or inter-frequency carriers are being measured by using MGs, transmission/reception in the serving cell is precluded due to switching of the RF.

In LTE, NR, and so on, regarding the intra-frequency measurement and/or the inter-frequency measurement, the measurement may be performed on at least one of reference signal received power (RSRP), received signal strength indicator (RSSI), a reference signal received quality (RSRQ), and a signal to interference plus noise ratio (SINR) of non-serving carriers.

Here, the RSRP is the received power of a desired signal, and is measured by using at least one of, for example, a cell-specific reference signal (CRS), a channel state information-reference signal (CSI-RS), and so on. The RSSI is total received power including the received power of the desired signal and interference and noise power. The RSRQ is the ratio of the RSRP to the RSSI.

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

Examples of the SS may include a PSS (Primary Synchronization Signal), an SSS (Secondary Synchronization Signal), an NR-PSS, an NR-SSS. The SSB is constituted of one or more symbols (for example, OFDM symbols). In the SSB, the PSS, the SSS, and the PBCH may be allocated in one or more different symbols. For example, the SSB may be constituted of a total of four or five symbols including the PSS in one symbol, the SSS in one symbol, and the PBCH in two or three symbols.

Note that measurement using the SS (or SSB) may be referred to as SS (or SSB) measurement. The SS (or SSB) measurement may include measurement of, for example, the SS-RSRP, the SS-RSRQ, and the SS-SINR.

The UE may communicate (perform transmission/reception, measurement, and so on of signals) by using at least one frequency band (carrier frequency) of a first frequency range (FR1 (Frequency Range <NUM>)) and a second frequency band (FR2 (Frequency Range <NUM>)).

For example, FR1 may be a frequency band of <NUM> or less (sub-<NUM>), and FR2 may be a frequency band which is higher than <NUM> (above-<NUM>). FR1 may be defined as a frequency range using at least one of <NUM>, <NUM>, and <NUM> as a sub-carrier spacing (SCS), and FR2 may be defined as a frequency range using at least one of <NUM> and <NUM> as an SCS. Note that frequency bands, definitions and so on of FR1 and FR2 are by no means limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

FR2 may be used exclusively for a time division duplex (TDD) band. FR2 is preferably used synchronously among a plurality of base stations. In a case where FR2 includes a plurality of carriers, the carriers are preferably used synchronously.

The UE may obtain information related to intra-frequency measurement and/or inter-frequency measurement signaled (configured) from the base station by using, for example, higher layer signaling, physical layer signaling, or a combination thereof.

Here, for example, the higher layer signaling may be any one or combinations of RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information, and the like.

For example, the MAC signaling may use MAC control elements (MAC CE), MAC PDUs (Protocol Data Units), and the like. For example, the broadcast information may be master information blocks (MIBs), system information blocks (SIBs), minimum system information (RMSI (Remaining Minimum System Information)), and the like.

Information related to intra-frequency measurement and/or inter-frequency measurement may include, for example, a frequency band (carrier) to be measured, the presence (or absence) of synchronization of the carrier to be measured, a resource position (a slot number, a symbol number, an RB index, and so on) for a signal to be measured, an SSB-based measurement timing configuration (SMTC), and an index of an SSB to be measured. The SSB index may be associated with the resource position for the SSB.

Note that the presence (or absence) of synchronization of the carrier to be measured may be configured in the UE by RRC signaling by using, for example, information (that may also be referred to as a parameter "useServingCellTimingForSync") regarding whether the carrier to be measured is in synchronization with the serving cell (whether an SSB index transmitted by a neighboring cell can be derived, based on a timing for the serving cell).

The index of the SSB to be measured may be signaled by using a bit map (that may also be referred to as a parameter "ssb-ToMeasure"). The bit map may be associated with a frequency band to be measured. For example, for a higher frequency band to be measured, a longer bit map may be used to signal the SSB index.

The SMTC may include the duration, periodicity, timing offset, and so on of an of an SSB measurement period (that may also be referred to as an SMTC window, a measurement timing, or the like). The UE performs, in a configured SMTC window, measurement based on the SSB to be measured.

UE capability signaling for configuring MG for inter-frequency measurement may be supported. For the UE capability signaling, the MG for inter-frequency measurement can be configured, for example, separately for FR1 and FR2.

For example, the UE may report capability signaling including an MG length (or duration), an MG repetition interval, and the like for gaps corresponding to at least one of the gap for each FR1, the gap for each FR2, and the gap for each UE.

In LTE, for a delay requirement for the intra-frequency measurement (Intra-frequency measurement), the presence (or absence) of at least one of CA (Carrier Aggregation) and DC (Dual Connectivity) and the number of carriers configured as secondary cells (SCells) are not particularly taken into account.

The intra-frequency measurement in LTE can be performed at arbitrary timings, and thus even in a case where the UE includes only one or a small number of cell searchers (cell search functions) (only one or a small number of cell searchers are implemented in the UE), the cell searcher(s) can be used (shared or reused) to measure different CCs (Component Carriers) at different timings.

In NR, an SMTC indicating at least one of the timing, periodicity, and duration (length of time) for the intra-frequency measurement is configured for each carrier (CC).

Given implementation costs and the like of the UE, only one or a small number of cell searchers are preferably implemented and used to measure a plurality of CCs, like LTE.

However, in a case where the SMTC window is configured at overlapping timings during a plurality of CCs, simultaneous measurement of a plurality of CCs using one cell searcher is precluded. Accordingly, the delay requirement for the intra-frequency measurement for a case of overlapping SMTC windows is preferably specified.

Study has been conducted on scaling of the delay requirement depending on the number of CCs to be measured for which overlapping SMTC windows are configured. For example, in a case where SMTC windows with a periodicity of <NUM> completely overlap during CA of two CCs, the UE assumes that a measurement periodicity for each CC is <NUM> instead of <NUM>.

In this manner, the UE and the base station can relax the delay requirement by increasing an SMTC periodicity. For example, the delay time as a delay requirement is represented in the periodicity multiplied by the number of samples.

In a case where CA or DC is performed, for PCells (primary cells), PSCells (primary secondary cells), and SCells (secondary cells), the intra-frequency measurement of the PCells and PSCells are preferably given priority over the intra-frequency measurement of the SCells. Thus, study has been conducted on avoidance of the above-described scaling depending on the number of CCs from being applied to at least one of the PCells and PSCells.

In a case where the scaling is not applied to at least one of the PCells and PSCells, in the implementation of the UE, a dedicated cell searcher needs to be implemented in the at least one of the PCells and PSCells, as shown in <FIG>. For example, in a case where one PCell, one PSCell, and one SCell are configured, three cell searchers are configured.

This implementation ensures that, even in a case where an SMTC window for at least one of the PCell and the PSCell overlaps an SMTC window in another CC, measurement can be inevitably performed on at least one of the PCell and PSCell at a periodicity and a timing configured by the SMTC. However, there is a problem of high implementation costs.

Thus, the present inventors came up with the idea of a UE operation for appropriately performing intra-frequency measurement on the carrier to be given priority in view of mobility while suppressing an increase in the number of cell searchers implemented in the UE.

Embodiments according to the present disclosure will be described in detail with reference to the drawings as follows. A radio communication method according to each embodiment may be employed independently or may be employed in combination.

In an embodiment, the UE and/or the base station may perform scaling, based on the number of carriers including overlapping SMTC windows, as the delay requirement for the intra-frequency measurement for a case of performing at least one of CA and DC. In the scaling, the delay requirement for each carrier may be defined by treating a specified carrier (that meets a condition) differently from the other carriers.

The UE and the radio base station may determine, for the scaling, a scaling factor (a coefficient or a multiplier), based on the configuration of each carrier.

The UE and the radio base station treat a specified carrier (that meets a certain condition) differently from the other carriers (unspecified carriers) for scaling.

The specified carrier may be at least one of the following carriers <NUM> to <NUM>.

The specified carrier may be an SpCell (Special Cell). The SpCell may be a PCell in an MCG (Master Cell Group) in DC or a PSCell in an SCG (Secondary Cell Group), or a PCell in any other case.

The specified carrier may be treated by using at least one of following calculation methods <NUM> and <NUM>.

Calculation method <NUM>: for counting of the number of carriers used for scaling, a counting method for the specified carrier differs from a counting method for the other carriers. For example, at least one of following counting methods <NUM> and <NUM> may be used.

Counting method <NUM>: in scaling of the other carriers, one specified carrier is counted by using a value larger than <NUM>.

Counting method <NUM>: in scaling of the specified carrier, one specified carrier is counted by using a value larger than <NUM>.

According to calculation method <NUM>, each carrier can be given priority.

Calculation method <NUM>: a scaling variable (scaling factor) that is different from a scaling factor using the number of carriers is defined and applied. For example, at least one of following scaling variables <NUM> and <NUM> may be used.

Scaling variable <NUM>: the scaling variable is applied only to the specified carrier or to the other carriers.

Scaling variable <NUM>: different values of the scaling variable are applied to the specified carrier and to the other carriers.

The scaling variable for at least one of the specified carrier and the other carriers may be signal from the NW by the higher layer signaling or the like. The signaling allows the NW to flexibly configure the scaling and configure priority for each carrier.

A scaling factor KSMTC_x for one carrier with a periodicity SMTC_X may be derived by following Formula (<NUM>). [Formula <NUM>] <MAT>.

Here, SMTC_X is an SMTC periodicity to be calculated. SMTC_Y represents an SMTC periodicity which are longer than SMTC_X, among the SMTC periodicities configured for carriers to be measured. max{SMTC} represents the maximum SMTC periodicity for all the carriers to be measured.

α represents the number of carriers including an SMTC window overlapping the SMTC window with the maximum SMTC periodicity, other than the carrier configured by the maximum SMTC periodicity.

β represents the number of carriers including an SMTC window having an SMTC periodicity smaller than SMTC_Y and overlapping the SMTC window with SMTC_Y, other than the carrier configured by SMTC_Y.

γ represents the number of carriers including an SMTC window having an SMTC periodicity smaller than SMTC_X and overlapping the SMTC window with SMTC_X, other than the carrier configured by SMTC_X.

KSMTC_Y represents a scaling factor for SMTC_Y.

In a case where SMTC_X and an offset are configured for a plurality of carriers (Nfreq_SMTC_X carriers), KSMTC_X for each carrier may be scaled by a factor of Nfreq_SMTC_X.

Based on KSMTC_X, the periodicity and delay requirement for the intra-frequency measurement for the carrier configured with SMTC_X are each scaled by a factor of KSMTC_X.

As shown in <FIG>, a case will be described in which CC #<NUM>, CC #<NUM>, and CC #<NUM> are configured, SMTC_A = <NUM> is configured for CC #<NUM>, SMTC_B = <NUM> is configured for CC #<NUM>, and SMTC_C = <NUM> is configured for CC #<NUM>.

In a case where KSMTC_C for CC #<NUM> is determined as KSMTC_X, the parameters are as follows.

In this case, Formula (<NUM>) is represented by following Formula (<NUM>). [Formula <NUM>] <MAT>.

Based on KSMTC_C = <NUM>, the UE may measure CC #<NUM> once for every three SMTC windows.

In a case where KSMTC_B for CC #<NUM> is determined as KSMTC_X, the parameters are as follows.

Based on KSMTC_B = <NUM>, the UE may measure CC #<NUM> once for every three SMTC windows.

In a case where KSMTC_A for CC #<NUM> is determined as KSMTC_X, the parameters are as follows.

Based on KSMTC_A = <NUM>/<NUM>, the UE may measure CC #<NUM> three times for every four SMTC windows.

In derivation of α, β, and γ for the scaling factor for the other carriers, a weight larger than <NUM> (certain number, coefficient, increment, or step, for example, <NUM>) may be counted for one specified carrier (for example, PCell).

In derivation of α, β, and γ for the scaling factor for the specified carrier, <NUM> may be counted for one of the other carriers, and an obtained scaling factor may be divided by the above-described certain number.

The weight for the PCell may be the same as the weight for the PSCell. The weight for the PCell may be larger than the weight for the PSCell.

The weight for the specified carrier may be indicated from the NW by using the higher layer signaling or the like.

As shown in <FIG>, a case will be described in which CC #<NUM>, CC #<NUM>, CC #<NUM>, and CC #<NUM> are configured, SMTC_A = <NUM> is configured for CC #<NUM> and CC #<NUM>, SMTC_B = <NUM> is configured for CC #<NUM>, SMTC_C = <NUM> is configured for CC #<NUM> and CC #<NUM>, and offsets with different SMTCs are configured for CC #<NUM> and CC #<NUM>. Here, CC #<NUM> is configured to be a specified carrier.

In a case where KSMTC_C for CC #<NUM> (other carrier) is determined as KSMTC_X, the parameters are as follows.

Based on KSMTC_C = <NUM>, the UE may measure CC #<NUM> once for every four SMTC windows.

Based on KSMTC_B = <NUM>, the UE may measure CC #<NUM> once for every four SMTC windows.

In a case where KSMTC_A for CC #<NUM> and CC #<NUM> is determined as KSMTC_X, the parameters are as follows.

Furthermore, Nfreq_SMTC_A > <NUM>, and thus KSMTC_A may be scaled by a factor of Nfreq_SMTC_A. Furthermore, since CC# <NUM> is a specified carrier, KSMTC_A may be scaled by a factor of <NUM>/Nfreq_SMTC_A. In this case, KSMTC_A is expressed by following Formula (<NUM>). [Formula <NUM>] <MAT>.

Based on KSMTC_C = <NUM>/<NUM>, the UE may measure CC #<NUM><NUM> times for every <NUM> SMTC windows.

The delay requirement is thus determined, allowing priority to be given to the specified carrier in the intra-frequency measurement.

Hereinafter, a structure of a radio communication system according to one embodiment of the present disclosure will be described. In this radio communication system, the radio communication method according to each embodiment of the present disclosure described above may be used alone or may be used in combination for communication.

<FIG> is a diagram to show an example of a schematic structure of the radio communication system according to one embodiment. A radio communication system <NUM> can adopt carrier aggregation (CA) and/or dual connectivity (DC) to group a plurality of fundamental frequency blocks (component carriers) into one, where the system bandwidth in an LTE system (for example, <NUM>) constitutes one unit.

Note that the radio communication system <NUM> may be referred to as "LTE (Long Term Evolution)," "LTE-A (LTE-Advanced)," "LTE-B (LTE-Beyond)," "SUPER <NUM>," "IMT-Advanced," "<NUM> (4th generation mobile communication system)," "<NUM> (5th generation mobile communication system)," "NR (New Radio)," "FRA (Future Radio Access)," "New-RAT (Radio Access Technology)," and so on, or may be referred to as a system implementing these.

The radio communication system <NUM> includes a radio base station <NUM> that forms a macro cell C1 of a relatively wide coverage, and radio base stations <NUM> (12a to 12c) that form small cells C2, which are placed within the macro cell C1 and which are narrower than the macro cell C1. Also, user terminals <NUM> are placed in the macro cell C1 and in each small cell C2. The arrangement, the number, and the like of each cell and user terminal <NUM> are by no means limited to the aspect shown in the diagram.

The user terminals <NUM> can connect with both the radio base station <NUM> and the radio base stations <NUM>. It is assumed that the user terminals <NUM> use the macro cell C1 and the small cells C2 at the same time by means of CA or DC. The user terminals <NUM> can execute CA or DC by using a plurality of cells (CCs).

Between the user terminals <NUM> and the radio base station <NUM>, communication can be carried out by using a carrier of a relatively low frequency band (for example, <NUM>) and a narrow bandwidth (referred to as, for example, an "existing carrier," a "legacy carrier" and so on). Meanwhile, between the user terminals <NUM> and the radio base stations <NUM>, a carrier of a relatively high frequency band (for example, <NUM>, <NUM>, and so on) and a wide bandwidth may be used, or the same carrier as that used between the user terminals <NUM> and the radio base station <NUM> may be used.

The user terminals <NUM> can perform communication by using time division duplex (TDD) and/or frequency division duplex (FDD) in each cell. Furthermore, in each cell (carrier), a single numerology may be employed, or a plurality of different numerologies may be employed.

Numerologies may be communication parameters applied to transmission and/or reception of a certain signal and/or channel, and for example, may indicate at least one of a subcarrier spacing, a bandwidth, a symbol length, a cyclic prefix length, a subframe length, a TTI length, the number of symbols per TTI, a radio frame structure, a particular filter processing performed by a transceiver in a frequency domain, a particular windowing processing performed by a transceiver in a time domain, and so on. For example, if certain physical channels use different subcarrier spacings of the OFDM symbols constituted and/or different numbers of the OFDM symbols, it may be referred to as that the numerologies are different.

A wired connection (for example, means in compliance with the CPRI (Common Public Radio Interface) such as an optical fiber, an X2 interface and so on) or a wireless connection may be established between the radio base station <NUM> and the radio base stations <NUM> (or between two radio base stations <NUM>).

The radio base station <NUM> and the radio base stations <NUM> are each connected with a higher station apparatus <NUM>, and are connected with a core network <NUM> via the higher station apparatus <NUM>.

The radio base stations <NUM> are radio base stations having local coverages, and may be referred to as "small base stations," "micro base stations," "pico base stations," "femto base stations," "HeNBs (Home eNodeBs)," "RRHs (Remote Radio Heads)," "transmitting/receiving points" and so on. Hereinafter, the radio base stations <NUM> and <NUM> will be collectively referred to as "radio base stations <NUM>," unless specified otherwise.

Each of the user terminals <NUM> is a terminal that supports various communication schemes such as LTE and LTE-A, and may include not only mobile communication terminals (mobile stations) but stationary communication terminals (fixed stations).

In the radio communication system <NUM>, as radio access schemes, orthogonal frequency division multiple access (OFDMA) is applied to the downlink, and single carrier frequency division multiple access (SC-FDMA) and/or OFDMA is applied to the uplink.

OFDMA is a multi-carrier communication scheme to perform communication by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier. SC-FDMA is a single carrier communication scheme to mitigate interference between terminals by dividing the system bandwidth into bands formed with one or continuous resource blocks per terminal, and allowing a plurality of terminals to use mutually different bands. Note that the uplink and downlink radio access schemes are by no means limited to the combinations of these, and other radio access schemes may be used.

In the radio communication system <NUM>, a downlink shared channel (PDSCH (Physical Downlink Shared Channel), which is used by each user terminal <NUM> on a shared basis, a broadcast channel (PBCH (Physical Broadcast Channel)), downlink L1/L2 control channels and so on, are used as downlink channels. User data, higher layer control information, SIBs (System Information Blocks) and so on are communicated on the PDSCH. The MIBs (Master Information Blocks) are communicated on the PBCH.

The downlink L1/L2 control channels include a PDCCH (Physical Downlink Control Channel), an EPDCCH (Enhanced Physical Downlink Control Channel), a PCFICH (Physical Control Format Indicator Channel), a PHICH (Physical Hybrid-ARQ Indicator Channel) and so on. Downlink control information (DCI), including PDSCH and/or PUSCH scheduling information, and so on are communicated on the PDCCH.

Note that the DCI scheduling DL data reception may be referred to as "DL assignment," and the DCI scheduling UL data transmission may be referred to as "UL grant.

The number of OFDM symbols to use for the PDCCH is communicated on the PCFICH. Transmission confirmation information (for example, also referred to as "retransmission control information," "HARQ-ACK," "ACK/NACK," and so on) of HARQ (Hybrid Automatic Repeat reQuest) to a PUSCH is transmitted on the PHICH. The EPDCCH is frequency-division multiplexed with the PDSCH (downlink shared data channel) and used to communicate DCI and so on, like the PDCCH.

In the radio communication system <NUM>, an uplink shared channel (PUSCH (Physical Uplink Shared Channel)), which is used by each user terminal <NUM> on a shared basis, an uplink control channel (PUCCH (Physical Uplink Control Channel)), a random access channel (PRACH (Physical Random Access Channel)) and so on are used as uplink channels. User data, higher layer control information and so on are communicated on the PUSCH. In addition, radio quality information (CQI (Channel Quality Indicator)) of the downlink, transmission confirmation information, scheduling request (SR), and so on are transmitted on the PUCCH. By means of the PRACH, random access preambles for establishing connections with cells are communicated.

In the radio communication system <NUM>, a cell-specific reference signal (CRS), a channel state information-reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), and so on are transmitted as downlink reference signals. In the radio communication system <NUM>, a measurement reference signal (SRS (Sounding Reference Signal)), a demodulation reference signal (DMRS), and so on are transmitted as uplink reference signals. Note that DMRS may be referred to as a "user terminal specific reference signal (UE-specific Reference Signal). " Transmitted reference signals are by no means limited to these.

<FIG> is a diagram to show an example of an overall structure of the radio base station according to one embodiment. A radio base station <NUM> includes a plurality of transmitting/receiving antennas <NUM>, amplifying sections <NUM>, transmitting/receiving sections <NUM>, a baseband signal processing section <NUM>, a call processing section <NUM> and a transmission line interface <NUM>. Note that the radio base station <NUM> may be configured to include one or more transmitting/receiving antennas <NUM>, one or more amplifying sections <NUM> and one or more transmitting/receiving sections <NUM>.

User data to be transmitted from the radio base station <NUM> to the user terminal <NUM> by the downlink is input from the higher station apparatus <NUM> to the baseband signal processing section <NUM>, via the transmission line interface <NUM>.

The transmitting/receiving sections <NUM> convert baseband signals that are pre-coded and output from the baseband signal processing section <NUM> on a per antenna basis, to have radio frequency bands and transmit the result. The radio frequency signals having been subjected to frequency conversion in the transmitting/receiving sections <NUM> are amplified in the amplifying sections <NUM>, and transmitted from the transmitting/receiving antennas <NUM>. The transmitting/receiving sections <NUM> can be constituted with transmitters/receivers, transmitting/receiving circuits or transmitting/receiving apparatus that can be described based on general understanding of the technical field to which the present disclosure pertains. Note that each transmitting/receiving section <NUM> may be structured as a transmitting/receiving section in one entity, or may be constituted with a transmitting section and a receiving section.

In the baseband signal processing section <NUM>, user data that is included in the uplink signals that are input is subjected to a fast Fourier transform (FFT) process, an inverse discrete Fourier transform (IDFT) process, error correction decoding, a MAC retransmission control receiving process, and RLC layer and PDCP layer receiving processes, and forwarded to the higher station apparatus <NUM> via the transmission line interface <NUM>. The call processing section <NUM> performs call processing (setting up, releasing and so on) for communication channels, manages the state of the radio base station <NUM>, manages the radio resources and so on.

The transmission line interface <NUM> transmits and/or receives signals to and/or from the higher station apparatus <NUM> via a certain interface. The transmission line interface <NUM> may transmit and/or receive signals (backhaul signaling) with other radio base stations <NUM> via an inter-base station interface (for example, an optical fiber in compliance with the CPRI (Common Public Radio Interface) and an X2 interface).

Note that the transmitting/receiving section <NUM> may further include an analog beam forming section that performs analog beam forming. The analog beam forming section may be constituted with an analog beam forming circuit (for example, a phase shifter or a phase shift circuit) or analog beam forming apparatus (for example, a phase shifter) that can be described based on general understanding of the technical field to which the present invention pertains. The transmitting/receiving antenna <NUM> may be constituted with, for example, an array antenna.

The transmitting/receiving section <NUM> transmits and/or receives data in a cell included in a carrier configured with SMTC. The transmitting/receiving sections <NUM> may transmit information about the intra-frequency measurement and/or inter-frequency measurement and so on to the user terminal <NUM>.

<FIG> is a diagram to show an example of a functional structure of the radio base station according to one embodiment of the present disclosure. Note that, the present example primarily shows functional blocks that pertain to characteristic parts of the present embodiment, and it is assumed that the radio base station <NUM> may include other functional blocks that are necessary for radio communication as well.

The baseband signal processing section <NUM> at least includes a control section (scheduler) <NUM>, a transmission signal generation section <NUM>, a mapping section <NUM>, a received signal processing section <NUM>, and a measurement section <NUM>. Note that these structures may be included in the radio base station <NUM>, and some or all of the structures do not need to be included in the baseband signal processing section <NUM>.

The control section <NUM> can be constituted with a controller, a control circuit or control apparatus that can be described based on general understanding of the technical field to which the present disclosure pertains.

The control section <NUM>, for example, controls the generation of signals in the transmission signal generation section <NUM>, the mapping of signals by the mapping section <NUM>, and so on. The control section <NUM> controls the signal receiving processes in the received signal processing section <NUM>, the measurements of signals in the measurement section <NUM>, and so on.

The control section <NUM> controls the scheduling (for example, resource assignment) of system information, a downlink data signal (for example, a signal transmitted on the PDSCH), a downlink control signal (for example, a signal transmitted on the PDCCH and/or the EPDCCH. transmission confirmation information, and so on). Based on the results of determining necessity or not of retransmission control to the uplink data signal, or the like, the control section <NUM> controls generation of a downlink control signal, a downlink data signal, and so on.

The control section <NUM> controls the scheduling of a synchronization signal (for example, PSS (Primary Synchronization Signal)/SSS (Secondary Synchronization Signal)), a downlink reference signal (for example, CRS, CSI-RS, DMRS), and so on.

The control section <NUM> controls the scheduling of 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 the PUSCH. transmission confirmation information, and so on), a random access preamble (for example, a signal transmitted on the PRACH), an uplink reference signal, and so on.

The control section <NUM> may provide control to form a transmission beam and/or a reception beam by using digital BF (for example, precoding) in the baseband signal processing section <NUM> and/or analog BF (for example, phase rotation) in the transmitting/receiving section <NUM>. The control section <NUM> may provide control to form a beam, based on downlink channel information, uplink channel information, and so on. The channel information may be acquired from the received signal processing section <NUM> and/or the measurement section <NUM>.

The control section <NUM> may configure the intra-frequency measurement for each of a plurality of carriers. The control section <NUM> may configure a periodicity for a measurement timing for each of the intra-frequency measurement and schedule the periodicity, based on the configuration of each of the plurality of carriers. In the scheduling, processing for the specified carrier among the plurality of carriers may differ from processing for the unspecified carriers.

The transmission signal generation section <NUM> generates downlink signals (downlink control signals, downlink data signals, downlink reference signals and so on) based on commands from the control section <NUM> and outputs the downlink signals to the mapping section <NUM>. The transmission signal generation section <NUM> can be constituted with a signal generator, a signal generation circuit or signal generation apparatus that can be described based on general understanding of the technical field to which the present disclosure pertains.

For example, the transmission signal generation section <NUM> generates DL assignment to signal assignment information of downlink data and/or UL grant to signal assignment information of uplink data, based on commands from the control section <NUM>. The DL assignment and the UL grant are both DCI, and follow the DCI format. For a downlink data signal, encoding processing and modulation processing are performed in accordance with a coding rate, modulation scheme, or the like determined based on channel state information (CSI) from each user terminal <NUM>.

The mapping section <NUM> maps the downlink signals generated in the transmission signal generation section <NUM> to certain radio resources, based on commands from the control section <NUM>, and outputs these to the transmitting/receiving sections <NUM>. The mapping section <NUM> can be constituted with a mapper, a mapping circuit or mapping apparatus that can be described based on general understanding of the technical field to which the present disclosure pertains.

The received signal processing section <NUM> performs receiving processes (for example, demapping, demodulation, decoding and so on) of received signals that are input from the transmitting/receiving sections <NUM>. Here, the received signals are, for example, uplink signals that are transmitted from the user terminals <NUM> (uplink control signals, uplink data signals, uplink reference signals and so on). The received signal processing section <NUM> can be constituted with a signal processor, a signal processing circuit or signal processing apparatus that can be described based on general understanding of the technical field to which the present disclosure pertains.

The received signal processing section <NUM> outputs the decoded information acquired through the receiving processes to the control section <NUM>. For example, if the received signal processing section <NUM> receives the PUCCH including HARQ-ACK, the received signal processing section <NUM> outputs the HARQ-ACK to the control section <NUM>. The received signal processing section <NUM> outputs the received signals and/or the signals after the receiving processes to the measurement section <NUM>.

The measurement section <NUM> can be constituted with a measurer, a measurement circuit or measurement apparatus that can be described based on general understanding of the technical field to which the present disclosure pertains.

For example, the measurement section <NUM> may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, and so on, based on the received signal. The measurement section <NUM> may measure a received power (for example, RSRP (Reference Signal Received Power)), a received quality (for example, RSRQ (Reference Signal Received Quality), an SINR (Signal to Interference plus Noise Ratio), an SNR (Signal to Noise Ratio)), a signal strength (for example, RSSI (Received Signal Strength Indicator)), channel information (for example, CSI), and so on. The measurement results may be output to the control section <NUM>.

<FIG> is a diagram to show an example of an overall structure of a user terminal according to one embodiment. A user terminal <NUM> includes a plurality of transmitting/receiving antennas <NUM>, amplifying sections <NUM>, transmitting/receiving sections <NUM>, a baseband signal processing section <NUM> and an application section <NUM>. Note that the user terminal <NUM> may be configured to include one or more transmitting/receiving antennas <NUM>, one or more amplifying sections <NUM> and one or more transmitting/receiving sections <NUM>.

Radio frequency signals that are received in the transmitting/receiving antennas <NUM> are amplified in the amplifying sections <NUM>. The transmitting/receiving sections <NUM> receive the downlink signals amplified in the amplifying sections <NUM>. The transmitting/receiving sections <NUM> convert the received signals into baseband signals through frequency conversion, and output the baseband signals to the baseband signal processing section <NUM>. The transmitting/receiving sections <NUM> can be constituted with transmitters/receivers, transmitting/receiving circuits or transmitting/receiving apparatus that can be described based on general understanding of the technical field to which the present disclosure pertains. Note that each transmitting/receiving section <NUM> may be structured as a transmitting/receiving section in one entity, or may be constituted with a transmitting section and a receiving section.

The baseband signal processing section <NUM> performs, on each input baseband signal, an FFT process, error correction decoding, a retransmission control receiving process, and so on. The downlink user data is forwarded to the application section <NUM>. The application section <NUM> performs processes related to higher layers above the physical layer and the MAC layer, and so on. In the downlink data, broadcast information may be also forwarded to the application section <NUM>.

Meanwhile, the uplink user data is input from the application section <NUM> to the baseband signal processing section <NUM>. The baseband signal processing section <NUM> performs a retransmission control transmission process (for example, an HARQ transmission process), channel coding, precoding, a discrete Fourier transform (DFT) process, an IFFT process and so on, and the result is forwarded to the transmitting/receiving section <NUM>.

The transmitting/receiving sections <NUM> convert the baseband signals output from the baseband signal processing section <NUM> to have radio frequency band and transmit the result. The radio frequency signals having been subjected to frequency conversion in the transmitting/receiving sections <NUM> are amplified in the amplifying sections <NUM>, and transmitted from the transmitting/receiving antennas <NUM>.

The transmitting/receiving section <NUM> transmits and/or receives data in a cell included in a carrier configured with SMTC. The transmitting/receiving sections <NUM> may receive information about the intra-frequency measurement and/or inter-frequency measurement and so on from the radio base station <NUM>.

<FIG> is a diagram to show an example of a functional structure of a user terminal according to one embodiment. Note that, the present example primarily shows functional blocks that pertain to characteristic parts of the present embodiment, and it is assumed that the user terminal <NUM> may include other functional blocks that are necessary for radio communication as well.

The control section <NUM> can be constituted with a controller, a control circuit or control apparatus that can be described based on general understanding of the technical field to which the present disclosure pertains.

The control section <NUM> acquires a downlink control signal and a downlink data signal transmitted from the radio base station <NUM>, from the received signal processing section <NUM>. The control section <NUM> controls generation of an uplink control signal and/or an uplink data signal, based on the results of determining necessity or not of retransmission control to a downlink control signal and/or a downlink data signal.

The control section <NUM> may control the intra-frequency measurement for each of a plurality of carriers (for example, CCs). A periodicity for a measurement timing (for example, an SMTC window) may be configured for each of the intra-frequency measurement. The control section <NUM> may schedule the periodicity, based on the configuration of each of the plurality of carriers. In the scheduling, the processing for the specified carrier among the plurality of carriers may differ from the processing for the unspecified carriers.

The control section <NUM> may determine a coefficient for scaling of the periodicity, based on the number of carriers (for example, at least one of α, β, and γ) in which measurement timings overlap.

The control section <NUM> may perform at least one of counting the specified carrier using a number larger than <NUM> in counting the number of carriers for determination of the coefficient for the unspecified carriers and counting the unspecified carriers using a number smaller than <NUM> in counting the number of carriers for determination of the coefficient for the specified carrier.

A variable for at least one of the specified carrier and the unspecified carriers is configured, and the control section <NUM> may scale the periodicity, based on the variable.

The specified carrier may be at least one of the primary cell, the primary secondary cell, and the cell configured by the radio base station <NUM>.

If the control section <NUM> acquires a variety of information signaled by the radio base station <NUM> from the received signal processing section <NUM>, the control section <NUM> may update parameters to use for control, based on the information.

The transmission signal generation section <NUM> generates uplink signals (uplink control signals, uplink data signals, uplink reference signals and so on) based on commands from the control section <NUM>, and outputs the uplink signals to the mapping section <NUM>. The transmission signal generation section <NUM> can be constituted with a signal generator, a signal generation circuit or signal generation apparatus that can be described based on general understanding of the technical field to which the present disclosure pertains.

For example, the transmission signal generation section <NUM> generates an uplink control signal about transmission confirmation information, the channel state information (CSI), and so on, based on commands from the control section <NUM>. The transmission signal generation section <NUM> generates uplink data signals, based on commands from the control section <NUM>. For example, when a UL grant is included in a downlink control signal that is signaled from the radio base station <NUM>, the control section <NUM> commands the transmission signal generation section <NUM> to generate the uplink data signal.

The mapping section <NUM> maps the uplink signals generated in the transmission signal generation section <NUM> to radio resources, based on commands from the control section <NUM>, and outputs the result to the transmitting/receiving sections <NUM>. The mapping section <NUM> can be constituted with a mapper, a mapping circuit or mapping apparatus that can be described based on general understanding of the technical field to which the present disclosure pertains.

The received signal processing section <NUM> performs receiving processes (for example, demapping, demodulation, decoding and so on) of received signals that are input from the transmitting/receiving sections <NUM>. Here, the received signals are, for example, downlink signals transmitted from the radio base station <NUM> (downlink control signals, downlink data signals, downlink reference signals and so on). The received signal processing section <NUM> can be constituted with a signal processor, a signal processing circuit or signal processing apparatus that can be described based on general understanding of the technical field to which the present disclosure pertains. The received signal processing section <NUM> can constitute the receiving section according to the present disclosure.

The received signal processing section <NUM> outputs the decoded information acquired through the receiving processes to the control section <NUM>. The received signal processing section <NUM> outputs, for example, broadcast information, system information, RRC signaling, DCI and so on, to the control section <NUM>. The received signal processing section <NUM> outputs the received signals and/or the signals resulting from the receiving processes to the measurement section <NUM>.

For example, the measurement section <NUM> may perform, on one or both of a first carrier and a second carrier, the intra-frequency measurement and/or inter-frequency measurement using SSBs. The measurement section <NUM> can be constituted with a measurer, a measurement circuit or measurement apparatus that can be described based on general understanding of the technical field to which the present disclosure pertains.

For example, the measurement section <NUM> may perform RRM measurement, CSI measurement, and so on, based on the received signal. The measurement section <NUM> may measure a received power (for example, RSRP), a received quality (for example, RSRQ, SINR, SNR), a signal strength (for example, RSSI), channel information (for example, CSI), and so on. The measurement results may be output to the control section <NUM>.

Note that the block diagrams that have been used to describe the above embodiments show blocks in functional units. These functional blocks (components) may be implemented in arbitrary combinations of at least one of hardware and software. Also, the method for implementing each functional block is not particularly limited. That is, each functional block may be realized by one piece of apparatus that is physically or logically coupled, or may be realized by directly or indirectly connecting two or more physically or logically separate pieces of apparatus (for example, via wire, wireless, or the like) and using these plurality of pieces of apparatus.

For example, a radio base station, a user terminal, and so on according to one embodiment of the present disclosure may function as a computer that executes the processes of the radio communication method of the present disclosure. <FIG> is a diagram to show an example of a hardware structure of the radio base station and the user terminal according to one embodiment. Physically, the above-described radio base station <NUM> and user terminals <NUM> may each be formed as computer apparatus that includes a processor <NUM>, a memory <NUM>, a storage <NUM>, a communication apparatus <NUM>, an input apparatus <NUM>, an output apparatus <NUM>, a bus <NUM>, and so on.

Note that, in the following description, the word "apparatus" may be interpreted as "circuit," "device," "unit," and so on. The hardware structure of the radio base station <NUM> and the user terminals <NUM> may be designed to include one or a plurality of apparatuses shown in the drawings, or may be designed not to include part of pieces of apparatus.

Each function of the radio base station <NUM> and the user terminals <NUM> is implemented, for example, by allowing certain software (programs) to be read on hardware such as the processor <NUM> and the memory <NUM>, and by allowing the processor <NUM> to perform calculations to control communication via the communication apparatus <NUM> and control at least one of reading and writing of data in the memory <NUM> and the storage <NUM>.

Furthermore, the processor <NUM> reads programs (program codes), software modules, data, and so on from at least one of the storage <NUM> and the communication apparatus <NUM>, into the memory <NUM>, and executes various processes according to these. As for the programs, programs to allow computers to execute at least part of the operations of the above-described embodiments are used. For example, the control section <NUM> of each user terminal <NUM> may be implemented by control programs that are stored in the memory <NUM> and that operate on the processor <NUM>, and other functional blocks may be implemented likewise.

The memory <NUM> is a computer-readable recording medium, and may be constituted with, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically EPROM), a RAM (Random Access Memory), and other appropriate storage media. The memory <NUM> may be referred to as a "register," a "cache," a "main memory (primary storage apparatus)" and so on. The memory <NUM> can store executable programs (program codes), software modules, and the like for implementing the radio communication method according to one embodiment of the present disclosure.

The communication apparatus <NUM> is hardware (transmitting/receiving device) for allowing inter-computer communication via at least one of wired and wireless networks, and may be referred to as, for example, a "network device," a "network controller," a "network card," a "communication module," and so on. The communication apparatus <NUM> may be configured to include a high frequency switch, a duplexer, a filter, a frequency synthesizer, and so on in order to realize, for example, at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-described transmitting/receiving antennas <NUM> (<NUM>), amplifying sections <NUM> (<NUM>), transmitting/receiving sections <NUM> (<NUM>), transmission line interface <NUM>, and so on may be implemented by the communication apparatus <NUM>.

The radio base station <NUM> and the user terminals <NUM> may be structured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), and so on, and part or all of the functional blocks may be implemented by the hardware.

Note that the terminology described in the present disclosure and the terminology that is needed to understand the present disclosure may be replaced by other terms that convey the same or similar meanings. For example, at least one of the "channel" and "symbol" may be replaced by a "signal" ("signaling"). "Signals" may be "messages. " A reference signal may be abbreviated as an "RS," and may be referred to as a "pilot," a "pilot signal," and so on, depending on which standard applies. A "component carrier (CC)" may be referred to as a "cell," a "frequency carrier," a "carrier frequency" and so on.

Here, numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. For example, numerology may indicate at least one of a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, a particular filter processing performed by a transceiver in the frequency domain, a particular windowing processing performed by a transceiver in the time domain, and so on.

A slot may be constituted of one or a plurality of symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, and so on). A slot may be a time unit based on numerology.

A slot may include a plurality of mini-slots. Each mini-slot may be constituted of one or a plurality of symbols in the time domain. A mini-slot may be referred to as a "sub-slot. " A mini-slot may be constituted of symbols fewer than the slots. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be referred to as "PDSCH (PUSCH) mapping type A. " A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as "PDSCH (PUSCH) mapping type B.

A radio frame, a subframe, a slot, a mini-slot, and a symbol all express time units in signal communication. A radio frame, a subframe, a slot, a mini-slot, and a symbol may each be called by other applicable terms.

For example, one subframe may be referred to as a "transmission time interval (TTI)," a plurality of consecutive subframes may be referred to as a "TTI" or one slot or one mini-slot may be referred to as a "TTI. " That is, at least one of a subframe and a TTI may be a subframe (<NUM>) in existing LTE, may be a shorter period than <NUM> (for example, <NUM> to <NUM> symbols), or may be a longer period than <NUM>. Note that a unit expressing TTI may be referred to as a "slot," a "mini-slot," and so on instead of a "subframe.

TTIs may be transmission time units for channel-encoded data packets (transport blocks), code blocks, codewords and so on, or may be the unit of processing in scheduling, link adaptation, and so on. Note that, when TTIs are given, the time interval (for example, the number of symbols) to which transport blocks, code blocks, codewords, or the like are actually mapped may be shorter than the TTIs.

The number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI having a time length of <NUM> may be referred to as a "normal TTI" (TTI in LTE Rel. <NUM> to Rel. <NUM>), a "long TTI," a "normal subframe," a "long subframe" and so on. A TTI that is shorter than a normal TTI may be referred to as a "shortened TTI," a "short TTI," a "partial or fractional TTI," a "shortened subframe," a "short subframe," a "mini-slot," a "sub-slot" and so on.

A resource block (RB) is the unit of resource allocation in the time domain and the frequency domain, and may include one or a plurality of consecutive subcarriers in the frequency domain.

An RB may include one or a plurality of symbols in the time domain, and may be one slot, one mini-slot, one subframe, or one TTI in length. One TTI and one subframe each may be constituted of one or a plurality of resource blocks.

Note that one or a plurality of RBs may be referred to as a "physical resource block (PRB (Physical RB))," a "sub-carrier group (SCG)," a "resource element group (REG),"a "PRB pair," an "RB pair" and so on.

A resource block may be constituted of one or a plurality of resource elements (REs).

The information, parameters, and so on described in the present disclosure may be represented in absolute values or in relative values with respect to certain values, or may be represented in another corresponding information. For example, radio resources may be specified by certain indices.

The names used for parameters and so on in the present disclosure are in no respect limiting. For example, since various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), and so on) and information elements can be identified by any suitable names, the various names assigned to these individual channels and information elements are in no respect limiting.

Information, signals, and so on can be output in at least one of from higher layers to lower layers and from lower layers to higher layers. Information, signals, and so on may be input and/or output via a plurality of network nodes.

Signaling of information is by no means limited to the aspects/embodiments described in the present disclosure, and other methods may be used as well. For example, signaling of information may be implemented by using physical layer signaling (for example, downlink control information (DCI), uplink control information (UCI), higher layer signaling (for example, RRC (Radio Resource Control) signaling, broadcast information (master information block (MIB), system information blocks (SIBs), and so on), MAC (Medium Access Control) signaling and so on), and other signals and/or combinations of these.

Note that physical layer signaling may be referred to as "L1/L2 (Layer <NUM>/Layer <NUM>) control information (L1/L2 control signals)," "L1 control information (L1 control signal)," and so on. Also, RRC signaling may be referred to as an "RRC message," and can be, for example, an RRC connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, and so on. Also, MAC signaling may be signaled using, for example, MAC control elements (MAC CEs).

Also, signaling of certain information (for example, signaling of "X holds") does not necessarily have to be signaled explicitly, and can be signaled implicitly (by, for example, not signaling this certain information or signaling another piece of information).

Software, commands, information, and so on may be transmitted and received via communication media. For example, when software is transmitted from a website, a server, or other remote sources by using at least one of wired technologies (coaxial cables, optical fiber cables, twisted-pair cables, digital subscriber lines (DSL), and so on) and wireless technologies (infrared radiation, microwaves, and so on), at least one of these wired technologies and wireless technologies are also included in the definition of communication media.

The terms "system" and "network" used in the present disclosure may be used interchangeably.

In the present disclosure, the terms such as a "base station (BS)," a "radio base station," a "fixed station," a "NodeB," an "eNodeB (eNB)," a "gNodeB (gNB)," an "access point," a "transmission point," a "reception point," a "transmission/reception point," a "cell," a "sector," a "cell group," a "carrier," a "component carrier," a "bandwidth part (BWP)", and so on can be used interchangeably. The base station may be referred to as the terms such as a "macro cell," a small cell," a "femto cell," a "pico cell," and so on.

A base station can accommodate one or a plurality of (for example, three) cells (also referred to as "sectors"). When a base station accommodates a plurality of cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area can provide communication services through base station subsystems (for example, indoor small base stations (RRHs (Remote Radio Heads))). The term "cell" or "sector" refers to part of or the entire coverage area of at least one of a base station and a base station subsystem that provides communication services within this coverage.

In the present disclosure, the terms "mobile station (MS)," "user terminal," "user equipment (UE)," and "terminal" and so on may be used interchangeably.

At least one of a base station and a mobile station may be referred to as a "transmitting apparatus," a "receiving apparatus," and so on. Note that at least one of a base station and a mobile station may be device mounted on a mobile body or a mobile body itself, and so on. The mobile body may be a vehicle (for example, a car, an airplane, and the like), may be a mobile body which moves unmanned (for example, a drone, an automatic operation car, and the like), or may be a robot (a manned type or unmanned type). Note that at least one of a base station and a mobile station also includes an apparatus which does not necessarily move during communication operation.

The radio base station in the present disclosure may be interpreted as a user terminal. For example, each aspect/embodiment of the present disclosure may be applied to the structure that replaces a communication between a radio base station and a user terminal with a communication between a plurality of user terminals (for example, which may be referred to as "D2D (Device-to-Device)," "V2X (Vehicle-to-Everything)," and the like). In this case, the user terminals <NUM> may have the functions of the radio base stations <NUM> described above. The words "uplink" and "downlink" may be interpreted as the words corresponding to the terminal-to-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel and so on may be interpreted as a side channel.

Likewise, the user terminal in the present disclosure may be interpreted as a radio base station.

Actions which have been described in the present disclosure to be performed by a base station may, in some cases, be performed by upper nodes. In a network including one or a plurality of network nodes with base stations, it is clear that various operations that are performed to communicate with terminals can be performed by base stations, one or more network nodes (for example, MMEs (Mobility Management Entities), S-GW (Serving-Gateways), and so on may be possible, but these are not limiting) other than base stations, or combinations of these.

The aspects/embodiments illustrated in the present disclosure may be used individually or in combinations, which may be switched depending on the mode of implementation. The order of processes, sequences, flowcharts, and so on that have been used to describe the aspects/embodiments in the present disclosure may be reordered as long as inconsistencies do not arise. For example, although various methods have been illustrated in the present disclosure with various components of steps in exemplary orders, the specific orders that are illustrated herein are by no means limiting.

The aspects/embodiments illustrated in the present disclosure may be applied to LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER <NUM>, IMT-Advanced, <NUM> (4th generation mobile communication system), <NUM> (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), CDMA <NUM>, UMB (Ultra Mobile Broadband), IEEE <NUM> (Wi-Fi (registered trademark)), IEEE <NUM> (WiMAX (registered trademark)), IEEE <NUM>, UWB (Ultra-WideBand), Bluetooth (registered trademark), systems that use other adequate radio communication methods and next-generation systems that are enhanced based on these. A plurality of systems may be combined (for example, a combination of LTE or LTE-A and <NUM>, and the like) and applied.

Reference to elements with designations such as "first," "second," and so on as used in the present disclosure does not generally limit the quantity or order of these elements. These designations may be used in the present disclosure only for convenience, as a method for distinguishing between two or more elements. Thus, reference to the first and second elements does not imply that only two elements may be employed, or that the first element must precede the second element in some way.

The term "judging (determining)" as in the present disclosure herein may encompass a wide variety of actions. For example, "judging (determining)" may be interpreted to mean making "judgments (determinations)" about judging, calculating, computing, processing, deriving, investigating, looking up (for example, searching a table, a database, or some other data structures), ascertaining, and so on.

"Judging (determining)" may be interpreted to mean making "judgments (determinations)" about receiving (for example, receiving information), transmitting (for example, transmitting information), input, output, accessing (for example, accessing data in a memory), and so on.

"Judging (determining)" as used herein may be interpreted to mean making "judgments (determinations)" about resolving, selecting, choosing, establishing, comparing, and so on. In other words, "judging (determining)" may be interpreted to mean making "judgments (determinations)" about some action.

"Judging (determining)" may be interpreted as "assuming," "expecting," "considering," and the like.

"The maximum transmit power" according to the present disclosure may mean a maximum value of the transmit power, may mean the nominal maximum transmit power (the nominal UE maximum transmit power), or may mean the rated maximum transmit power (the rated UE maximum transmit power).

In the present disclosure, when two elements are connected, the two elements may be considered "connected" or "coupled" to each other by using one or more electrical wires, cables, printed electrical connections, or the like, and, as some non-limiting and non-inclusive examples, by using electromagnetic energy having wavelengths in radio frequency regions, microwave regions, (both visible and invisible) optical regions, or the like.

In the present disclosure, the phrase "A and B are different" may mean that "A and B are different from each other. " The terms "separate," "be coupled" and so on may be interpreted similarly.

Claim 1:
A terminal (<NUM>) comprising:
a control section (<NUM>) configured to scale a delay requirement of an intra-frequency measurement based on a synchronization signal block by a scaling factor corresponding to each of a plurality of carriers; and
a receiving section (<NUM>) configured to receive the synchronization signal block in each of the plurality of carriers,
wherein the receiving section (<NUM>) is configured to receive, from a base station (<NUM>), a parameter that indicates a periodicity of a measurement of the synchronization signal block for each of the plurality of carriers,
the control section (<NUM>) is configured to derive a measurement period for the intra-frequency measurement by multiplying a value based on the parameter by the scaling factor,
the plurality of carriers includes a first carrier and a second carrier that is different from the first carrier,
a first scaling factor for the first carrier out of the plurality of carriers is based on a number of the plurality of carriers,
a second scaling factor, for the second carrier is not based on the number of the plurality of carriers, that is different from the first scaling factor, and
the control section (<NUM>) is configured to increase the delay requirement by using the first scaling factor and to increase the delay requirement by using the second scaling factor.