TERMINAL, RADIO COMMUNICATION METHOD FOR A TERMINAL AND BASE STATION

Abstract

A user terminal according to one aspect of the present invention includes a measurement section that performs, on both a first carrier and a second carrier, a frequency-matched measurement using a synchronization signal block (SSB), and a control section that judges, based on information from the SSB measurement for the second carrier, whether the transmission and / or reception of data using the first carrier is enabled or disabled at a specific time. According to one aspect of the present invention, a decrease in the transfer rate and so on can be suppressed even in a case where the measurements are performed on a plurality of server cells.

Description

TERMINAL, RADIO COMMUNICATION METHOD FOR A TERMINAL AND BASE STATION Technical Field

[0001] This disclosure relates to a user terminal and a radio communication method in a next-generation mobile communication system. Technical Background

[0002] The Long Term Evolution (LTE) specifications were developed for the purpose of achieving a further increase in data rate, and a further reduction in latency and so forth in UMTS (Universal Mobile Telecommunications System) networks (see Non-Patent Literature 1). The LTE-A specifications (LTE Advanced, LTE Rel. 10, Rel. 11, Rel. 12 and Rel. 13) were developed in order to achieve a further increase in capacity, advancement and so forth of LTE (LTE Rel. 8 and Rel. 9).

[0003] Successor systems to LTE (e.g., FRA (Future Radio Access), 5G (5th generation mobile communication system), 5G+ (plus), NR (New Radio), NX (New Radio Access), and FX (Future Generation Radio Access); also referred to as LTE Rel. 14 or 15 and beyond) are also under study.

[0004] In an existing LTE system (e.g., LTE Rel. 8 to Rel. 13), a user terminal (UE: User Equipment) detects a synchronization signal (SS), synchronizes with a network (e.g., a base station (eNB: eNode B)), and identifies a cell for connection (e.g., identifies the cell using a cell ID (Identifier)). This process is referred to as a cell search. The synchronization signal includes, for example, a PSS (Primary Synchronization Signal) and / or an SSS (Secondary Synchronization Signal).

[0005] The EU receives broadcast information (e.g., blocs of Petition 870200112213, dated 03 / 09 / 2020, page 10 / 78 2 / 65 Master Information Blocks (MIBs), System Information Blocks (SIBs), and so on) to acquire configuration information (which may be referred to as system information or similar) for communication with a network.

[0006] MIBs can be transmitted on a broadcast channel (PBCH (Physical Broadcast Channel)) and SIBs can be transmitted on a shared downlink (DL) channel (PDSCH (Physical Downlink Shared Channel). List of Citations Non-Patented Literature Non-Patent Literature 1: 3GPP TS 36.300 V8.12.0 Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8), April, 2010 Summary of the Invention Technical Problem

[0007] In a future radio communication system (hereinafter also referred to simply as NR), measurements are made using synchronization signal blocks (SSBs). A UE is notified of a timing configuration related to measurements using SSBs (SMTC (SMM-based Measurement Timing Configuration)). The UE performs, within a configured SMTC window, the measurements based on the SSBs to be measured.

[0008] It is also being studied whether the transmission and / or reception of data is enabled within the SMTC window.

[0009] However, in a case where SSB measurements are performed on a plurality of server cells, the uniform judgment of whether data transmission and / or reception within the SMTC window is enabled or disabled disadvantageously leads to a limitation. Petition 870200112213, dated 03 / 09 / 2020, page 11 / 78 3 / 65 excessive use of resources available for data transmission and / or reception, or a failure to achieve appropriate measurements. In this case, the communication transfer rate, frequency utilization efficiency, and so on may be degraded.

[0010] Thus, an objective of the present disclosure is to provide a user terminal and a radio communication method that are capable of suppressing a decrease in the transfer rate and so on, even in a case where the measurements are performed on a plurality of server cells. Solution to the problem

[0011] A user terminal according to an aspect of this disclosure includes a measurement section that performs, on both a first carrier and a second carrier, a frequency-same measurement using a synchronization signal block (SSB) and a control section that judges, based on information for the SSB measurement for the second carrier, whether the transmission and / or reception of data using the first carrier is enabled or disabled at a specific time. Advantageous Effects of the Invention

[0012] According to one aspect of this disclosure, a decrease in the transfer rate and so on can be suppressed even in a case where measurements are performed on a plurality of server cells. Brief Description of the Drawings

[0013] FIG. 1 is a diagram to show an example of an assumption related to FR1 measurements; FIG. 2 is a diagram to show another example of an assumption related to FR1 measurements; Petition 870200112213, dated 03 / 09 / 2020, p. 12 / 78 4 / 65 FIG. 3 is a diagram to show an example of an assumption related to FR2 measurements; FIG. 4 is a diagram to show another example of an assumption related to FR2 measurements; FIG. 5 is a diagram to show an example of a measurement process in a case where SMTC windows for a plurality of carriers overlap; FIG. 6 is a diagram to show another example of a measurement process in a case where SMTC windows for a plurality of carriers overlap each other; FIG. 7 is a diagram to show an example of a limitation in data transmission and / or reception in the case where SMTC windows for a plurality of carriers overlap each other; FIG. 8 is a diagram to show an example of a data transmission / reception operation determination flow according to a mode; FIG. 9 is a diagram to show an example of controlling a data transmission / reception operation, depending on whether the SMTC windows overlap or not; FIG. 10 is a diagram to show an example of a schematic structure of a radio communication system according to a modality; FIG. 11 is a diagram to show an example of a general structure of a radio base station according to a mode; FIG. 12 is a diagram to show an example of a functional structure of a radio base station according to a mode; FIG. 13 is a diagram to show an example of a general structure. Petition 870200112213, dated 03 / 09 / 2020, page 13 / 78 5 / 65 of a user terminal according to a modality; FIG. 14 is a diagram to show an example of a functional structure of a user terminal according to a modality; FIG. 15 is a diagram to show an example of a hardware structure of the base radio station and the user terminal according to a modality; Description of the Modalities

[0014] In an existing LTE system, a UE supports cross-frequency measurements (interfrequency measurements) in which the measurements are performed on a non-server carrier different from a server carrier with which the connection was established.

[0015] The UE switches (retunes), in a measurement gap (MG), a frequency used (RF (Radio Frequency)) from the serving carrier to the non-serving carrier, performs measurements by using reference signals and so on, and then switches the frequency used from the non-serving carrier to the serving carrier.

[0016] Here, MG is a period for measurements of different frequencies and, within the period, UE for transmission and / or reception with the carrier being used for communication and performs measurements using a carrier with a different frequency.

[0017] In LTE, while the different frequency carrier is being measured using the MG, transmission and / or reception using the server cell are prevented due to RF switching. On the other hand, in other cases (e.g., same-frequency measurements), no transmission and / or reception restrictions are imposed in connection with the measurements.

[0018] In NR, the following measurements are under study. (1) Intrafrequency measurements without MG, Petition 870200112213, dated 03 / 09 / 2020, page 14 / 78 6 / 65 (2) Intrafrequency measurements with MG, and (3) Interfrequency measurements.

[0019] The intrafrequency measurements without MG in (1) described above are also referred to as same-frequency measurements without RF retuning. The intrafrequency measurements with MG in (2) described above are also referred to as same-frequency measurements with RF retuning. For example, in a case where no signal to be measured is included in an active BWP (Bandwidth Part), even same-frequency measurements need RF retuning and thus the measurements in (2) are performed.

[0020] Here, BWP corresponds to one or more partial frequency bands on a component carrier (CC) configured in NR. BWP may be referred to as a partial frequency band or a partial band.

[0021] The interfrequency measurements in (3) described above are also referred to as different frequency measurements. Different frequency measurements are assumed to use MG. However, different frequency measurements without MG may be performed in a case where the UE reports the UE's gapless measurement capability to a base station (which may be referred to as, for example, a BS (base station), a transmit / receive point (TRP), an eNB (eNodeB) or a gNB (NR NodeB)).

[0022] In NR, while the same frequency carrier or a different frequency carrier is being measured using the MG, transmission and / or reception using the server cell are prevented due to RF switching.

[0023] In LTE, NR and so on, for same frequency measurements and / or different frequency measurements, at least one of the following must be used: received reference signal power (RSRP), received signal strength (RSSI). Petition 870200112213, dated 03 / 09 / 2020, page 15 / 78 7 / 65 (Received Signal Strength Indicator) and a received reference signal quality (RSRQ) and a SINR (Signal-to-Noise Ratio) of the non-serving carrier can be measured.

[0024] Here, RSRP is the received power of a desired signal and is measured, for example, using at least one of a cell-specific reference signal (CRS), a channel state information reference signal (CSIRS), and so on. RSSI is the total received power including the received power of a desired signal, interference, and noise power. RSRQ is the ratio of RSRP to RSSI.

[0025] 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 similar) and may be referred to as an SS / PBCH block or similar.

[0026] The SS may include a PSS (Primary Synchronization Signal), an SSS (Secondary Synchronization Signal), an NR-PSS, and an NR-SSS. The SSB consists of one or more symbols (e.g., OFDM symbols). In the SSB, the PSS, SSS, and PBCH may be mapped to one or more different symbols. For example, the SSB may consist of a total of four or five symbols, including one PSS symbol, one SSS symbol, and two or three PBCH symbols.

[0027] Note that measurements using SS (or SSB) may be referred to as SS (or SSB) measurements. As SS (or SSB) measurements, for example, SS-RSRP, SS-RSRQ or SS-SINR measurements may be performed.

[0028] The UE can communicate (e.g., transmit and / or receive signals and perform measurements) using at least one frequency band (carrier frequency) included in a first frequency band (FR1: Petition 870200112213, dated 03 / 09 / 2020, p. 16 / 78 Frequency band 8 / 65 1) and a second frequency band (FR2: frequency band 2).

[0029] For example, FR1 can be a frequency band of 6 GHz or lower (sub-6 GHz) and FR2 can be a frequency band higher than 24 GHz (above 24 GHz). FR1 can be defined as a frequency band for which at least one of the 15, 30, and 60 kHz subcarrier spacings (SCSs) is used, and FR2 can be defined as a frequency band for which at least one of the 60 and 120 kHz SCSs is used. Note that the frequency bands, configurations, and so on of FR1 and FR2 are not limited to the frequency bands, configurations, and so on described above and, for example, FR1 can be a higher frequency band than the frequency band of FR2.

[0030] FR2 can be used exclusively for time-division duplexing (TDD) bands. FR2 is preferably synchronized between a plurality of base stations for operation. In a case where FR2 includes a plurality of carriers, the carriers are preferably synchronized for operation.

[0031] The UE may be notified by the base station of (configured by the base station with) information relating to measurements of the same frequency and / or measurements of different frequencies by the use of, for example, upper layer signaling, physical layer signaling or a combination thereof.

[0032] Here, upper layer signaling can be, for example, one of RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling and broadcast information or any combination thereof.

[0033] MAC signaling can use, for example, elements of Petition 870200112213, dated 03 / 09 / 2020, page 17 / 78 9 / 65 MAC control (MAC CEs), MAC PDUs (Product Data Units) or similar. Broadcast information may be, for example, master information blocks (MIBs), system information blocks (SIBs) or minimum system information (RMSI (Remaining Minimum System Information)).

[0034] Information relating to same-frequency and / or different-frequency measurements may include, for example, the frequency bands (carriers) to be measured, presence or absence of synchronization of the carriers to be measured, feature positions (slot numbers, symbol numbers or RB indices) for the signal to be measured, SSB-based measurement timing configuration (SMTC) and SSB indices to be measured. SSB indices may be associated with feature positions for the SSBs.

[0035] Note that the presence or absence of synchronization of the carriers to be measured can be configured for the UE, for example, by RRC signaling using information (which can also be referred to as the useServingCellTimingForSync parameter) regarding whether the carriers to be measured are synchronized with the server cell (whether the SSB indices transmitted by a neighboring cell can be derived based on the timing of the server cell).

[0036] The SSB indices to be measured can be reported using a bitmap (which can be referred to as the ssb-ToMeasure parameter). The bitmap can be associated with the frequency band to be measured. For example, the SSB indices can be reported using a bitmap whose length increases with the upper range of the frequency band to be measured.

[0037] SMTC may include the length, cycle, timing deviation, and so on of an SSB measurement period (which may be referred to Petition 870200112213, dated 03 / 09 / 2020, p. 18 / 78 10 / 65 as an SMTC window, a measurement timing or similar). The UE performs, within a configured SMTC window, the measurements based on the SSBs to be measured.

[0038] UE capability signaling to configure MGs for different frequency measurements can be supported. For UE capability signaling, for example, MGs for different frequency measurements can be configured separately for FR1 and FR2.

[0039] For example, the UE may notify capacity signaling, including a MG length or duration, an MG repetition cycle, and so on for gaps corresponding to at least one of the FR1-specific, FR2-specific, and UE-specific gaps. <Relação entre Medições de SSB e Habilitação e Desabilitação de Transmissão e / ou Recepção de Dados>

[0040] In NR, in a case where a numerology for an RS (e.g., SSBs) to be measured is different from a numerology for the data and / or control channel of the server cell, whether the UE can simultaneously process these signals with the different numerologies may depend on the UE's capability. For example, a UE that does not have the processing capability to simultaneously process these signals may be assumed to be disabled from performing data transmission and / or reception during measurements.

[0041] Note that numerology corresponds, for example, to SCS. In the present disclosure, the term SCS can be interpreted as corresponding to numerology. In the present disclosure, the term data can be interpreted as at least one of the data, a control channel, and a reference signal. For example, the transmission and / or reception of data can mean the transmission of PUCCH / PUSCH and / or the reception of PDCCH / PDSCH.

[0042] In FR2, it is assumed that the UE uses analog beamforming (BF) Petition 870200112213, dated 03 / 09 / 2020, p. 19 / 78 11 / 65 to receive BF during measurements. In this case, it is assumed that directing a beam to the RS to be measured disables data reception from the server cell. Thus, it can be assumed that the UE is disabled for data transmission and / or reception during measurements in FR2, regardless of the UE's capability.

[0043] It is also under study to allow flexible control, transmission and / or reception of data in symbols configured with SSBs, for NR. For example, for a case where a UE unable to simultaneously process different (or mixed) SCSs performs FR1 measurements, the following assumption can be made. (1) In a case where the SCS of the SSBs is different from the SCS of the server cell data and where the NW does not provide a notification indicating that the carriers to be measured are synchronized, the transmission and / or reception of data is disabled on all symbols in the period configured as the SMTC window. (2) In a case where the SCS of the SSBs is different from the data SCS of the server cell and where the NW provides notification indicating that the carriers to be measured are synchronized, data reception is disabled only on the SSB symbols to be measured.

[0044] FIG. 1 is a diagram to show an example of an assumption related to FR1 measurements. FIG. 2 is a diagram to show another example of an assumption related to FR1 measurements. FIG. 1 corresponds to a case where the carriers to be measured are not synchronized, and FIG. 2 corresponds to a case where the carriers to be measured are synchronized.

[0045] In these figures, the SSBs to be measured are transmitted on the carriers to be measured (server cell, neighboring cell 1 and neighboring cell 2). Petition 870200112213, dated 03 / 09 / 2020, page 20 / 78 12 / 65 2), the SCS of each of the carriers = 15 kHz and a slot = 1 ms. FIG. 1 corresponds to an SMTC window length = 5 ms, and FIG. 2 corresponds to an SMTC window length = 4 ms.

[0046] Each slot can include a plurality of (in the figures, two) candidate SSB resources. With a structure in which the SSBs are transmitted in the rear half of the slot, as in the present example, a demodulation reference signal (DMRS) for data can be allocated in the front half of the slot. This is suitable in view of a reduction in data decoding delay. The structure of the slots, the number of SSBs, and so on are not limited to the present example.

[0047] In a case where the carriers to be measured are not synchronized as in FIG. 1, an arbitrary period (e.g., symbols) within the SMTC window period can be used for SSB measurements and thus the UE is disabled to transmit and / or receive the data and control channel in the server cell during the SMTC window period.

[0048] On the other hand, in a case where the carriers to be measured are synchronized as in FIG. 2, the UE is disabled to transmit and / or receive the data and control channel on at least one carrier in symbols, including the symbols for the SSBs to be measured, but can transmit and / or receive the data and control channel on the other symbols, within the SMTC window period.

[0049] For example, for a case where the UE performs the FR2 measurements, the following assumption can be made. (a) A UE unable to perform fast receive beam switching fails to perform data transmission and / or reception on the symbols of the SSBs to be measured (symbols on which data transmission and / or reception is disabled may include the X symbols that precede and / or Petition 870200112213, dated 03 / 09 / 2020, p. 21 / 78 13 / 65 follow the respective SSB symbols), (b) A UE capable of performing fast receive beam switching (fast RX beam switching) fails to perform data transmission and / or reception in the symbols for the SSBs to be measured. (c) In a case where RSRQ measurement is indicated, data transmission and / or reception is disabled on RSSI measurement symbols, as well as on SSB symbols in (a) or (b).

[0050] OX in (a) described above can be determined, based on the SCS. For example, for SCS < 60 kHz, X = 0 can be determined, for 60 kHz < SCS < 120 kHz, X = 1 can be determined, and for 120 kHz < SCS, X = 2 can be determined.

[0051] FIG. 3 is a diagram to show an example of an assumption related to FR2 measurements. FIG. 4 is a diagram to show another example of an assumption related to FR2 measurements. FIG. 3 corresponds to a case where the UE is not capable of performing fast receiving beam switching, and FIG. 4 corresponds to a case where the UE can perform fast receiving beam switching.

[0052] In these figures, the SSBs to be measured are transmitted on the carriers to be measured (server cell, neighboring cell 1 and neighboring cell 2), the SCS of each of the carriers = 120 kHz and a slot = 0.125 ms. Both FIG. 3 and FIG. 4 illustrate an example that corresponds to an SMTC window length = 3 ms (24 slot s) and in which the SSBs are transmitted in a total of 16 slot s, including the first to eighth slot and the tenth to seventeenth slots between the slots, while none of the SSBs are transmitted in the other slots.

[0053] Each slot can include a plurality of (in the figures, two) candidate SSB resources, and SSBs can be transmitted using a plurality of Petition 870200112213, dated 03 / 09 / 2020, page 22 / 78 14 / 65 candidate SSB resources in the slot as in the present example. The structure of the slots, the number of SSBs, and so on are not limited to the present example.

[0054] In a case where the UE is unable to perform a fast receive beam switching as in FIG. 3, the UE is disabled, within the SMTC window period, to transmit and / or receive the data and control channel in the server cell, on at least one carrier in the symbols, including the symbols for the SSBs to be measured and the X symbols preceding and succeeding the respective symbols for the SSBs to be measured.

[0055] Note that FIG. 3 illustrates an example where, with the X symbols preceding and following the respective SSBs taken into account, data transmission and / or reception is substantially disabled over the SMTC window, but that a technician in the field may appreciate that, even in a case where the UE is not capable of performing fast beam switching on reception, the UE may, in some cases, perform data transmission and / or reception within the SMTC window period.

[0056] On the other hand, in a case where the UE is capable of performing fast receive beam switching as in FIG. 4, the UE is disabled, within the SMTC window period, to transmit and / or receive the data and control channel in the server cell, in at least one carrier in the symbols including the symbols for the SSBs to be measured, but can transmit and / or receive the data and control channel in the server cell in the other symbols.

[0057] As described above using these examples, the UE is preferably disabled from transmitting and / or receiving data only at the times when the UE actually performs the measurements. For example, the following are also under study: SMTC-based control, in which it is assumed that no data transmission and / or reception is permitted. Petition 870200112213, dated 03 / 09 / 2020, page 23 / 78 15 / 65 to be performed within the SMTC window, and MG-based control, in which measurements are performed on MG timings, when data transmission and / or reception is certainly disabled.

[0058] In a case where the timings within the SMTC window overlap between a plurality of carriers, it is difficult to measure these carriers simultaneously. This is because the UE usually includes only one or two functional sections for the measurements. Thus, the measurement ratio of carriers in measurements of the same frequency can be configured for the UE by upper-layer signaling or similar. The ratio between measurements of the same frequency and measurements of different frequencies can be configured for the UE by upper-layer signaling or similar.

[0059] FIG. 5 is a diagram to show an example of a measurement process in a case where the SMTC windows for a plurality of carriers overlap each other. FIG. 6 is a diagram to show another example of the measurement process in the case where the SMTC windows for a plurality of carriers overlap each other.

[0060] In these figures, server cells no. 0 and no. 2 correspond to the same frequency, the UE performs intra-frequency measurements on the SMTC window timings configured for the respective cells and performs measurements of different frequencies on SMTC window timings configured separately. The number of carriers that can be measured simultaneously is assumed to be 1, but the contents of this disclosure are not limited to this.

[0061] In FIG. 5, the SMTC windows for the server cells do not overlap. On the other hand, the SMTC window for server cell no. 2 overlaps the MG and thus overlaps with an SMTC window for a cell of a different frequency. In the present example, a ratio of the measurements of Petition 870200112213, dated 03 / 09 / 2020, page 24 / 78 16 / 65 same frequency and different frequencies is configured to be equal (the ratio is 50% or 1:1) and thus, in the overlapping SMTC windows, the measurements from server cell #2 and the measurements of different frequencies are performed at 1:1.

[0062] In FIG. 6, the SMTC windows for the server cells overlap. On the other hand, for none of the server cells does the SMTC window overlap the MG or the SMTC window of the different frequency cell. In the present example, the measurement ratios of the server cells are configured to be equal (the ratios are 100% / number of cells or 1:1:1) and thus, in the overlapping SMTC windows, the measurements of server cells no. 0 and no. 2 are performed at 1:1:1.

[0063] The present inventors of the present invention studied a case in which SSB measurements are performed on a plurality of server cells as described above. The present inventors found that the uniform judgment of whether data transmission and / or reception within the SMTC window is enabled or disabled leads, in a disadvantageous way, to an excessive limitation in resources available for data transmission and / or reception or a failure to achieve appropriate measurements.

[0064] FIG. 7 is a diagram to show an example of a limitation in data transmission and / or reception in the case where SMTC windows for a plurality of carriers overlap. In the present example, carriers A and B are used with carrier aggregation (CA). Note that CA can be interpreted as another term, for example, it can be interpreted as dual connectivity (DC).

[0065] The UE fails to perform, on each carrier, the transmission and / or reception of data in the symbols of the SSBs to be measured. In the server cell of each carrier, symbols are illustrated that correspond to a Petition 870200112213, dated 03 / 09 / 2020, page 25 / 78 17 / 65 case in which only that carrier is taken into account and in which the transmission and / or reception of data is deactivated.

[0066] However, in a certain case where, for example, the UE employs analog BF, directing the beam towards a B carrier (for example, when the B carrier is being measured), the use of an A carrier is disabled.

[0067] In this case, for symbols in which data transmission and / or reception on one of the carriers A and B is disabled, data transmission and / or reception on the other carrier is also considered disabled. The arrows illustrated in the figure indicate that, for symbols in which data transmission and / or reception on one carrier is disabled, data transmission and / or reception on the other carrier must also be disabled.

[0068] The present inventors have discovered that, even in the case where SMTC window timings are misaligned, for symbols where data transmission and / or reception on one carrier is disabled, data transmission and / or reception on the other carrier may also need to be disabled. For example, this case includes a situation where, when analog BF is used for reception, a UE unable to simultaneously process different SCSs uses a measurement functional section for a plurality of carriers.

[0069] Thus, the present inventors have devised a UE operation to enable measurements to be performed properly while maximizing available resources for data transmission and / or reception even in a case where SSB measurements are performed on a plurality of server cells.

[0070] Hereafter, the embodiments in accordance with this disclosure will be described in detail with reference to the drawings. The methods of Petition 870200112213, dated 03 / 09 / 2020, page 26 / 78 18 / 65 radiocommunication modes can be applied independently or combined for application. (Radio Communication Method)

[0071] In one embodiment, the UE and / or the base station judge a data transmission / reception operation from the UE to a given server cell (carrier), based on measurement timing information (e.g., SMTC and SSB indices) related to that server cell and timing information related to the other server cells.

[0072] The UE and / or the base station may judge (determine) the UE's data transmission / reception operation in the given server cell by taking into account at least one of the following: (1) whether SMTC timings on the carriers overlap or not, (2) whether the carriers are synchronized with each other or not, (3) whether the carriers belong to the same frequency band or not (e.g., within FR1 or within FR2), (4) which of the SSBs of each carrier should be measured (SSB indices), and (5) UE capacity information regarding whether a measurement operation on a specific carrier limits the transmit / receive operation in a server cell on the specific carrier or on the other carriers.

[0073] Note that in a case where the SMTC window timings on a given server cell overlap with some SMTC window timings on the other server carriers, the UE and / or the base station may assume that the data transmit / receive operation on the server cell is switched between the overlapping and non-overlapping portions.

[0074] The UE and / or the base station may judge that data transmission and / or reception is constantly disabled during the MG period. Petition 870200112213, dated 03 / 09 / 2020, page 27 / 78 19 / 65

[0075] FIG. 8 is a diagram to show an example of a data transmission / reception operation determination flow according to a mode. The flow in FIG. 8 is a flow to judge, during a measurement timing (SMTC window) in a given server cell for a carrier A, how the transmission and / or reception of data in the given server cell on carrier A is restricted (limited), based on the measurement timings on another carrier B.

[0076] In the present example, carrier A, including a cell to be measured, based on SMTC, is configured at least in the UE. In the case where carrier B is configured in the UE, carrier B also includes the cell to be measured, based on SMTC, and the UE is configured to perform CA using carriers A and B.

[0077] It is assumed that the server cells subject to CA are synchronized with each other. It is assumed that FR2 uses TDD and that the cells within FR2 are synchronized with each other. It is assumed that, within FR2, the analog BF is shared by a plurality of carriers. Note that these configurations, assumptions and the like are intended to simplify the illustration of the flow and do not limit the invention according to the present disclosure.

[0078] The subject of the operation in FIG. 8 can be the UE or the base station. In the description below, the subject of the operation is the UE.

[0079] The UE judges whether the cell to be subjected to the same frequency measurements (carrier A) corresponds to FR1 (step S101), or not.

[0080] In a case where the cell to be subjected to the same frequency measurements corresponds to FR1 (step S101-Sim), the UE judges whether another cell to be measured in the same frequency range (carrier B) is present (step S102) or not.

[0081] In a case where carrier B is present (step S102-Sim), Petition 870200112213, dated 03 / 09 / 2020, p. 28 / 78 20 / 65 the UE judges whether the SMTC windows (measurement timings) for carriers A and B overlap even partially temporarily (step S103), or not.

[0082] In a case where the SMTC windows on carriers A and B overlap (step S103-Sim), the UE judges whether the SCS of the SSBs on carrier B (SCS for the SSBs) is the same as the SCS of the data in the server cell on carrier A (SCS for the data) and / or whether the UE can simultaneously process different SCSs (step S104).

[0083] In a case where the SCS of the SSBs on carrier B is the same as the SCS of the data in the server cell on carrier A or the UE can simultaneously process different SCSs (step S104-Yes), the UE judges whether the SCS of the SSBs on carrier A is equal to the SCS of the data in the server cell on carrier A and / or whether the UE can simultaneously process different SCSs (step S105) or not.

[0084] In a case where the SCS of the SSBs on carrier A is the same as the SCS of the data in the server cell on carrier A or the UE can simultaneously process different SCSs (step S105-Yes), the UE assumes that no restriction is imposed on the transmission and / or reception of data within the SMTC window for carrier A (step S120).

[0085] Such conditional branching is used because, in the case of the S105-Sim step, even a UE that fails to simultaneously process a plurality of different SCSs performs, on the measurements and data on carrier A, processing based on the same single SCS and thus, appropriate handling can be achieved. Alternatively, in the case of the S105-Sim step, the UE can simultaneously process a plurality of different SCSs and thus, appropriate handling can be achieved even in a case where the measurements and data on carrier A need processing based on different SCSs. Petition 870200112213, dated 03 / 09 / 2020, p. 29 / 78 21 / 65

[0086] Note that in a case where carrier B is not present (step S102-No) or the SMTC windows on carriers A and B do not overlap (step S103-No), no other carrier is measured within the SMTC window for carrier A and that steps ending with step S104 are omitted, with the process proceeding to step S105.

[0087] Note that in a case where the UE is judged in step S104 to be able to process different SCSs simultaneously, step S105 may be omitted (the determination in step S105 is assumed to be Yes) and the process may proceed to step S120.

[0088] In a case where the SCS of the SSBs on carrier A is different from the SCS of the data in the server cell on carrier A, or the UE fails to process different SCSs simultaneously (step S105-No), the UE judges whether the cells on carrier A are synchronized (step S106). For example, in step S106, the UE judges whether the cell to be measured on carrier A is synchronized with the other cells on carrier A or not.

[0089] In a case where the cells on carrier A are synchronized (step S106-Sim), the UE assumes that data transmission and / or reception is disabled on the SSB symbols to be measured within the SMTC window for carrier A (step S121).

[0090] In a case where the cells on carrier A are not synchronized (step S106-No), the UE assumes that data transmission and / or reception is disabled on all symbols within the SMTC window for carrier A (step S122).

[0091] In a case where the SCS of the SSBs on carrier A is different from the SCS of the data in the server cell on carrier A, or the UE fails to process different SCSs simultaneously (step S104-No), the UE judges whether the SCS of the SSBs on carrier A is equal to the SCS of the data in the server cell on carrier A. Petition 870200112213, dated 03 / 09 / 2020, page 30 / 78 22 / 65 (stage S107) or not.

[0092] In a case where the SCS of the SSBs on carrier A is the same as the SCS of the data in the server cell for carrier A (step S107-Yes), the UE judges whether the cells on carrier B are synchronized (step S108) or not. For example, in step S108, the UE judges whether the cell to be measured on carrier B is synchronized with the other cells on carrier B or not.

[0093] In a case where the cells on carrier B are synchronized (step S108-Sim), the UE assumes that the transmission and / or reception of data in the server cell on carrier A is disabled in the SSB symbols to be measured within the SMTC window for carrier B (step S123).

[0094] Such conditional branches are used because, in the case of the S108-Sim step, even if the UE fails to simultaneously process a plurality of different SCSs, the measurements on carrier B and the data on carrier A need a process based on different SCSs.

[0095] In a case where the cells on carrier B are not synchronized (step S108-No), the UE assumes that data transmission and / or reception is disabled on all symbols within the SMTC window for carrier A (step S122).

[0096] In a case where the SCS of the SSBs on carrier A is different from the SCS of the data in the server cell for carrier A (step S107-No), the UE judges whether the cells on carrier A and carrier B are both synchronized (step S109) or not. For example, in step S109, the UE judges whether the cell to be measured on carrier A is synchronized or not with the other cells on carrier A and whether the cell to be measured on carrier B is synchronized or not with the other cells on carrier B.

[0097] In a case where the cells in carrier A and carrier B are both synchronized (step S109-Sim), the UE assumes that transmission and / or Petition 870200112213, dated 03 / 09 / 2020, page 31 / 78 23 / 65 data reception is disabled on the SSB symbols to be measured within the SMTC window for carrier A and on the SSB symbols to be measured within the SMTC window for carrier B (step S124). It can be said that this assumption includes both the assumption in S121 and the assumption in S123.

[0098] Such conditional branches are used because, in the case of step S109-Sim, even if the UE fails to simultaneously process a plurality of different SCSs, the data on carrier A needs a process based on a different SCS than the SCS for carrier A measurements and the SCS for carrier B measurements.

[0099] In a case where the cells on carrier A are not synchronized (step S109-No), the UE assumes that data transmission and / or reception is disabled on all symbols within the SMTC window for carrier A (step S122).

[0100] In the case where the cell to be subjected to the same frequency measurements does not correspond to FR1 (for example, it corresponds to FR2) (step S101-No), the UE judges, as in step S102, whether any other cell to be measured (carrier B) is present in the same frequency range (carrier B) or not (step S132).

[0101] In a case where carrier B is present (step S132-Sim), the UE judges, as in step S103, whether the SMTC windows (measurement timings) for carriers A and B overlap, or not, even if only partially temporarily (step S133).

[0102] In a case where the SMTC windows for carriers A and B overlap (step S133-Sim), the UE assumes that data transmission and / or reception is disabled on the SSB symbols to be measured within the SMTC window for carrier A and on the SSB symbols to be measured within the SMTC window for carrier B (step S124). Petition 870200112213, dated 03 / 09 / 2020, p. 32 / 78 24 / 65

[0103] Such conditional branches are used because, in consideration of the assumption that, within FR2, the analog BF is shared by a plurality of carriers, the UE fails to perform data transmission and / or reception on carrier A while measuring any of the carriers in an S133-Sim step case.

[0104] Note that in a case where carrier B is not present (step S132-No) or the SMTC windows on carriers A and B do not overlap (step S133-No), no other carrier is measured within the SMTC window for carrier A and that the UE assumes that data transmission and / or reception is disabled on the SSB symbols to be measured for the SMTC window of carrier A (step S121).

[0105] Such conditional branches are used because, given the assumption that the cells in FR2 are synchronized, in the case of step S132-No or step S133-No, it is sufficient to assume that the UE fails to perform data transmission and / or reception for carrier A only on the SSB symbols to be measured for carrier A. <Comutação de Suposição em Transmissão e / ou Recepção de Dados com Base em Janelas de SMTC Sobrepostas>

[0106] Note that, in connection with steps S103 and S133, the UE can assume that, for portions (time) of the SMTC window for carrier A that overlap with the SMTC window for carrier B, the results in steps S103 and S133 are Yes to judge the data transmission / reception operation in the server cell for carrier A. For portions (time) of the SMTC window for carrier A that do not overlap with the SMTC window for carrier B, the UE can assume that the results in steps S103 and S133 are No to judge the data transmission / reception operation in the server cell for carrier A. Petition 870200112213, dated 03 / 09 / 2020, page 33 / 78 25 / 65

[0107] With reference to FIG. 9, the control will be described in which a data transmission / reception operation is switched depending on whether the SMTC windows overlap or not. FIG. 9 is a diagram to show an example of switching control of the data transmission / reception operation depending on whether the SMTC windows overlap or not. In the present example, carriers A and B in FR2 are subject to CA.

[0108] For each carrier, SCS = 120 kHz and a slot = 0.125 ms. The SMTC window length for carrier A is 3 ms (24 slot s) and the SSBs are transmitted in a total of 16 slot s, including the first to eighth slot and the tenth to seventeenth slot s within the window as is the case with FIG. 3, while no SSB is transmitted in the other slot s.

[0109] The SMTC window length for carrier B is 1 ms (8 slot s) and the SSBs are transmitted in each of the slot s within the window. In other words, the SMTC window for carrier B is shorter than the SMTC window for carrier A. It is assumed that the initial timing is the same for the SMTC window for each carrier.

[0110] Each slot includes a plurality of (in the figure, two) candidate SSB features. For carrier A, subsequent SSBs are reported as measurement objects, and for carrier B, all SSBs are reported as measurement objects.

[0111] FIG. 9 shows deactivated data transmission and / or reception symbols in the server cell for carrier A, for which the switching of the data transmission / reception operation is taken into account.

[0112] A 1 ms period of initial timing in the SMTC window for carrier A corresponds to a case where the SMTC windows on carriers A and B overlap (step S133-Sim) and thus the UE executes a process based on step S124. Petition 870200112213, dated 03 / 09 / 2020, p. 34 / 78 26 / 65

[0113] On the other hand, a period of 1 ms to 3 ms from the initial timing corresponds to a case where the SMTC windows on carriers A and B do not overlap (step S133-No) and, therefore, the UE executes a process based on step S121. <Informações de Capacidade do UE>

[0114] The UE can use upper-layer signaling or similar to notify the base station of UE capacity information indicating whether a measurement operation on a certain carrier affects a data transmission / reception operation in the server cell for that carrier and / or any other carrier, and vice versa. UE capacity information can be information for each combination of AC bands, or it can be band-agnostic information, or it can be information common to all bands.

[0115] For example, UE capacity information may include information indicating whether or not the analog BF is shared by specific bands on a given carrier (FR2 or similar). The use of this information allows, in the case of Inter-band CA, the base station to properly judge whether intra-frequency measurements on one of the carriers affect data transmission / reception operation on the other carrier due to analog BF restriction.

[0116] UE capacity information may include information indicating whether the UE's functional measurement section is shared between server cells or used independently. A UE that includes a shared functional measurement section and fails to simultaneously process different SCSs is disabled, while applying the SCS of the SSBs to be measured, to perform data transmission and / or reception in the server cell using another SCS. The use of the information described above allows the base station to properly judge the UE's operation. Petition 870200112213, dated 03 / 09 / 2020, page 35 / 78 27 / 65

[0117] The UE capacity information described above may include information indicating whether the UE has the capability to handle digital BF. The UE and / or the base station may assume that data transmission and / or reception is restricted as described above in a case where the UE does not have the capability to handle digital BF.

[0118] The UE and / or the base station may judge, based on the UE's capacity information, whether data transmission / reception operation on a given carrier is enabled or disabled. Note that the UE and / or the base station may assume that the UE can simultaneously process SSBs and data with different SCSs, provided that the UE can apply CA with different SCSs.

[0119] According to the modality described above, even in a case where SSB measurements are performed in a plurality of server cells, the measurements can be adequately performed by the UE, with resources available to the UE for maximized data transmission and / or reception, based on information such as the configured SMTC window. <Variações>

[0120] In the embodiment described above, measurements using MGs were described. However, the method for judging whether data transmission and / or reception is enabled or disabled according to this disclosure can be similarly used for a case where other measurements are used. For example, even in the case of measurements of different frequencies (gapless measurements) without the use of MGs, it can be assumed that the disabled data transmission and / or reception timings as described above occur in the SMTC window for the carrier to be measured, as is the case with CA.

[0121] In the mode described above, it is assumed that, for example, in a case where the SMTC windows for FR2 are misaligned, the transmission Petition 870200112213, dated 03 / 09 / 2020, p. 36 / 78 28 / 65 and / or data reception is disabled in all server cells within FR2 during each window, leading to a degraded communication transfer rate. On the other hand, it is assumed that the alignment of SMTC windows within FR2 disables simultaneous measurements of a plurality of carriers, leading to an extended measurement cycle for each carrier and that the reporting of measurement results is thus delayed, hindering proper cell sectioning.

[0122] Thus, a configuration can be provided in which, on a given carrier (e.g., FR2), intrafrequency measurements of some cells (SCells) are not performed during CA. For example, UE can assume not to perform intrafrequency measurements on server cells for which no measurement object is configured by NW.

[0123] The base station can use upper-layer signaling or similar to report information indicating that no intra-frequency measurement is performed on a specific carrier (server cell). The information can be reported using an information element included in the RRC signaling and indicating the measurement object, an information element commonly configured for server cells (ServiceCellConfigCommon IE) or similar.

[0124] The UE can derive the number of a plurality of simultaneously measured carriers according to the number of functional measurement sections provided in the UE. The UE can report, to the base station, information related to the number of functional measurement sections and / or the number of simultaneous measurements, in the UE capacity information. Based on the UE capacity information, the base station can configure, for the UE, the limitation on intrafrequency measurements, as described above.

[0125] Note that, in the flowchart in FIG. 8, the UE judges, in step S101, whether Petition 870200112213, dated 03 / 09 / 2020, p. 37 / 78 29 / 65 the target cell of the same frequency measurements (carrier A) corresponds to FR1, but FR1 may be another frequency range (or another frequency band).

[0126] In the flowchart of FIG. 8, the UE judges, in step S102 and so on, whether any other cell to be measured (carrier B) is present within the same frequency range, but that carrier B may be present within a different frequency range. In this case, the UE may preferentially perform measurements of different frequencies without a gap.

[0127] In the flowchart of FIG. 8, the UE judges, based on the SMTC timings on each carrier and so on, whether the transmission and / or reception of data in the server cell is enabled or disabled, but no limitation is intended. For example, using upper-layer signaling or similar, the UE can be notified of information related to the control of data transmission and / or reception in a specific server cell for a given carrier. The UE can control the transmission and / or reception of data in the server cell, based on the notified information, independently of the flow in FIG. 8.

[0128] Information relating to the control of data transmission and / or reception may be, for example, information indicating that the transmission and / or reception of data in the specific server cell for a given carrier is judged, based on at least one of the S120 to S124 steps. The information may be, for example, information indicating that no restriction is imposed on the transmission and / or reception of data within the SMTC window for the given carrier.

[0129] In the present disclosure, the structure has been described in which a frequency band includes a plurality of carriers and in which a carrier includes a plurality of cells. The frequency band, the cell, the cell Petition 870200112213, dated 03 / 09 / 2020, page 38 / 78 30 / 65, the female employee, the holder, and the CC can be interpreted as one another. (Radio Communication System)

[0130] Hereafter, a radio communication system structure will be described according to an embodiment of the present disclosure. 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.

[0131] FIG. 10 is a diagram to show an example of a schematic structure of the radiocommunication system according to a modality. A radiocommunication system 1 may 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 (e.g., 20 MHz) constitutes a unit.

[0132] Note that radiocommunication system 1 may be referred to as “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), NR (New Radio), FRA (Future Radio Access), Nova-RAT (Radio Access Technology)” and so on, or may be referred to as a system for implementing them.

[0133] The radio communication system 1 includes a base radio station 11 that forms a macro cell C1 with relatively wide coverage and 12 base radio stations (12a to 12c) that form small cells C2, which are placed inside the macro cell C1 and are narrower than the macro cell C1. Also, user terminals 20 are placed in the macro cell C1 and in each small cell C2. The arrangement, number and similar of each cell and Petition 870200112213, dated 03 / 09 / 2020, page 39 / 78 31 / 65 user terminal 20, are by no means limited to the aspect shown in the diagram.

[0134] User terminals 20 can connect to both radio base station 11 and radio base stations 12. It is assumed that user terminals 20 use macro cell C1 and small cells C2 simultaneously via AC or DC. User terminals 20 can run AC or DC by using a plurality of cells (CCs).

[0135] Between user terminals 20 and base radio station 11, communication can be achieved using a relatively low frequency band carrier (e.g., 2 GHz) and narrow bandwidth (referred to as, for example, an existing carrier, a legacy carrier, and so on). Meanwhile, between user terminals 20 and base radio stations 12, a relatively high frequency band carrier (e.g., 3.5 GHz, 5 GHz, and so on) and wide bandwidth can be used, or the same carrier as that used between user terminals 20 and base radio station 11 can be used. Note that the frequency band structure for use at each base radio station is by no means limited to these.

[0136] User terminals 20 can perform communication using time-division duplexing (TDD) and / or frequency-division duplexing (FDD) in each cell. Furthermore, a single numerology or a plurality of different numerologies can be employed in each cell (carrier).

[0137] Numerologies can be communication parameters applied to the transmission and / or reception of a certain signal and / or channel, and indicate at least one of a subcarrier spacing, a bandwidth, a symbol length, a cyclic prefix length, a length Petition 870200112213, dated 03 / 09 / 2020, page 40 / 78 32 / 65 subframe, a TTI length, the number of symbols per TTI, a radio frame structure, a particular filtering 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 constituent OFDM symbols and / or different numbers of OFDM symbols, it can be referred to as having different numerologies.

[0138] A wired connection (e.g., CPRI (Common Public Radio Interface) compliant media, such as fiber optics, an X2 interface, and so forth) or a wireless connection may be established between base radio station 11 and base radio stations 12 (or between two base radio stations 12).

[0139] Base radio station 11 and base radio stations 12 are each connected to a top station device 30 and are connected to a core network 40 via top station device 30. Note that top station device 30 may be, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), and so on, but is by no means limited to these. Also, each base radio station 12 may be connected to top station device 30 via base radio station 11.

[0140] Note that base radio station 11 is a base radio station with relatively wide coverage, and may be referred to as a macro base station, a central node, an eNB (eNodeB), a transmit / receive point, and so on. Base radio stations 12 are base radio stations with local coverage and may be referred to as stations Petition 870200112213, dated 03 / 09 / 2020, p. 41 / 78 33 / 65 small base stations, micro base stations, pico base stations, femto base stations, HeNBs (domestic eNodeBs), RRHs (Remote Radio Heads), transmit / receive points, and so on. Hereafter, base 11 and 12 radio stations will be collectively referred to as base 10 radio stations, unless otherwise specified.

[0141] Each of the 20 user terminals 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 also stationary communication terminals (fixed stations).

[0142] In radio communication system 1, 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.

[0143] OFDMA is a multi-carrier communication scheme for performing 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 for mitigating interference between terminals by dividing the system bandwidth into bands formed with one or more contiguous resource blocks per terminal and allowing a plurality of terminals to use mutually different bands. Note that uplink and downlink radio access schemes are by no means limited to combinations thereof, and other radio access schemes may be used.

[0144] In radio communication system 1, a shared downlink channel (PDSCH (Physical Downlink Shared Channel)) that is used by each user terminal 20 on a basis Petition 870200112213, dated 03 / 09 / 2020, page 42 / 78 34 / 65 shared, a broadcast channel (PBCH (Physical Broadcast Channel)), L1 / L2 downlink control channels, and so on, are used as downlink channels. User data, upper-layer control information, SIBs (System Information Blocks), and so on, are communicated on the PDSCH. MIBs (Master Information Blocks) are communicated on the PBCH.

[0145] The L1 / L2 downlink 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, is communicated on the PDCCH.

[0146] Note that the reception of DCI scheduling DL data may be referred to as DL assignment, and the transmission of DCI scheduling UL data may be referred to as UL grant.

[0147] The number of OFDM symbols to be used for the PDCCH is communicated in the PCFICH. Transmission confirmation information (e.g., also referred to as "retransmission control information", "HARQ-ACK", ACK / NACK, and so on) from a HARQ (Hybrid Automatic Repeat Request) to a PUSCH is transmitted in the PHICH. The EPDCCH is frequency-division multiplexed with the PDSCH (downlink shared data channel) and used to communicate DCIs and so on, like the PDCCH.

[0148] In radio communication system 1, a shared uplink channel (PUSCH (Physical Uplink Shared Channel)) that is used by each user terminal 20 in a shared manner, a Petition 870200112213, dated 03 / 09 / 2020, page 43 / 78 35 / 65 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, upper-layer control information, and so on, are communicated on the PUCCH. Additionally, downlink radio quality information (CQI: Channel Quality Indicator), transmission confirmation information, SR (Scheduling Request), and so on are transmitted on the PUCCH. Through the PRACH, random access preambles to establish a connection with the cells are communicated.

[0149] In radio communication system 1, 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 radio communication system 1, a measurement reference signal (SRS (Survey 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). The transmitted reference signals are not limited to these. (Base Radio Station)

[0150] FIG. 11 is a diagram to show an example of a general structure of a base radio station according to a modality. A base radio station 10 includes a plurality of transmit / receive antennas 101, amplification sections 102, transmit / receive sections 103, a baseband signal processing section Petition 870200112213, dated 03 / 09 / 2020, page 44 / 78 36 / 65 104, a call processing section 105 and a communication path interface 106. Note that the base radio station 10 can be configured to include one or more transmit / receive antennas 101, one or more amplification sections 102 and one or more transmit / receive sections 103.

[0151] The user data to be transmitted from base radio station 10 to user terminal 20 via the downlink is entered from the upstation device 30 to the baseband signal processing section 104, via the communication path interface 106.

[0152] In the baseband signal processing section 104, user data is subject to transmission processes such as a PDCP (Packet Data Convergence Protocol) layer process, splitting and coupling of user data, RLC (Radio Link Control) layer transmission processes such as RLC retransmission control, MAC (Media Access Control) retransmission control (e.g., a HARQ transmission process), scheduling, transport format selection, channel coding, an inverse fast Fourier transform (IFFT) process, and a pre-coding process, and the result is forwarded to each transmit / receive section 103. Furthermore, downlink control signals are also subject to transmission processes such as channel coding and inverse fast Fourier transform, and the result is forwarded to each transmit / receive section 103.

[0153] The transmission / reception sections 103 convert baseband signals that are pre-encoded and emitted from the baseband signal processing section 104 on an antenna basis, to obtain radio frequency bands and transmit the result. The radio frequency signals, having undergone frequency conversion in the transmission / reception sections 103, are amplified in the amplification sections 102 and transmitted from the antennas. Petition 870200112213, dated 03 / 09 / 2020, page 45 / 78 37 / 65 Transmission / Reception 101. Transmission / reception sections 103 may consist of transmitters / receivers, transmission / reception circuits, or transmission / reception apparatus that may be described based on the general understanding of the technical field to which this disclosure pertains. Note that each transmission / reception section 103 may be structured as a transmission / reception section within an entity, or may consist of a transmission section and a reception section.

[0154] Meanwhile, regarding the uplink signals, the radio frequency signals that are received at the transmit / receive antennas 101 are amplified in the amplification sections 102. The transmit / receive sections 103 receive the amplified uplink signals from the amplification sections 102. The transmit / receive sections 103 convert the received signals into a baseband signal through frequency conversion and transmit it to the baseband signal processing section 104.

[0155] In the baseband signal processing section 104, the user data included in the uplink signals that are inserted is subjected to a Fast Fourier Transform (FFT) process, an Inverse Discrete Fourier Transform (IDFT) process, error correction decoding, a MAC retransmission control reception process, and RLC and PDCP layer reception processes, and forwarded to the higher station device 30 via the communication path interface 106. The call processing section 105 performs call processing (prepare, release, and so on) for communication channels, manages the base radio station state 10, manages radio resources, and so on.

[0156] The communication path interface 106 transmits and / or receives Petition 870200112213, dated 03 / 09 / 2020, page 46 / 78 38 / 65 signals to / from the higher station apparatus 30 via a given interface. The communication path interface 106 can transmit and / or receive signals (backhaul signaling) with other base radio stations 10 via an interbase station interface (e.g., a CPRI (Common Public Radio Interface) compliant fiber optic cable and an X2 interface).

[0157] Note that each transmit / receive section 103 may further include an analog beamforming section that performs analog beamforming. The analog beamforming section may consist of an analog beamforming circuit (e.g., a phase shifter or a phase shift circuit) or an analog beamforming apparatus (e.g., a phase shifter) described based on the general understanding of the technical field to which the present invention pertains. The transmit / receive antenna 101 may consist of, for example, an array of antennas.

[0158] The transmit / receive section 103 transmits and / or receives data in a cell included in a carrier configured with the SMTC. The transmit / receive section 103 can transmit, to the user terminal 20, information related to measurements of the same frequency and / or measurements of different frequencies and so on.

[0159] FIG. 12 is a diagram to show an example of a functional structure of the base radio station according to an embodiment of the present disclosure. Note that the present example primarily shows functional blocks that belong to characteristic parts of the present embodiment, and it is assumed that the base radio station 10 may include other functional blocks that are also necessary for radio communication.

[0160] The baseband signal processing section 104 includes by Petition 870200112213, dated 03 / 09 / 2020, page 47 / 78 39 / 65 minus a control (scheduler) section 301, a transmission signal generation section 302, a mapping section 303, a received signal processing section 304, and a measurement section 305. Note that these structures may be included in baseband radio station 10, and some or all of the structures need not be included in baseband signal processing section 104.

[0161] Control section (scheduler) 301 controls the entire base radio station 10. Control section 301 may consist of a controller, a control circuit, or a control apparatus, which may be described based on the general understanding of the technical field to which this disclosure pertains.

[0162] Control section 301, for example, controls signal generation in the transmission signal generation section 302, signal mapping by the mapping section 303, and so on. Control section 301 controls signal reception processes in the received signal processing section 304, signal measurements in the measurement section 305, and so on.

[0163] Control section 301 controls the scheduling (e.g., resource allocation) of system information, a downlink data signal (e.g., a signal transmitted on the PDSCH), a downlink control signal (e.g., a signal transmitted on the PDCCH and / or EPDCCH. Transmission confirmation information and so on). Based on the results of determining whether or not retransmission control is needed for the uplink data signal or similar, control section 301 controls the generation of a downlink control signal, a downlink data signal, and so on.

[0164] Control section 301 controls the scaling of a synchronization signal (e.g., PSS (Primary Synchronization Signal) / SSS (Signal of Petition 870200112213, dated 03 / 09 / 2020, page 48 / 78 40 / 65 Secondary Synchronization), a downlink reference signal (e.g., CRS, CSI-RS, DMRS, etc.), and so on.

[0165] Control section 301 controls the scheduling of an uplink data signal (e.g., a signal transmitted on the PUSCH), an uplink control signal (e.g., a signal transmitted on the PUCCH and / or on the PUSCH. Transmission confirmation information and so on), a random access preamble (e.g., a signal transmitted on the PRACH), an uplink reference signal and so on.

[0166] The control section 301 can perform control in which the digital BF in the baseband signal processing section 104 (e.g., precoding) and / or analog BF in the transmission / reception section 103 (e.g., phase rotation) is used to form a transmission beam and / or a reception beam. The control section 301 can perform control in which beams are formed based on downlink channel information, uplink channel information, and so on. Channel information can be acquired from the received signal processing section 304 and / or the measurement section 305.

[0167] Control section 301 can judge, based on information for the SSB measurements for the second carrier (e.g., SMTC information), whether data transmission to and / or reception from user terminal 20 at a specific time (e.g., within the SMTC window) using the first carrier is enabled or disabled.

[0168] Control section 301 can determine whether data transmission and / or reception using the first carrier is enabled or disabled, based on whether the timings for SSB measurements (e.g., the SMTC window) overlap between the first carrier and the second carrier.

[0169] Control section 301 can judge whether transmission and / or reception Petition 870200112213, dated 03 / 09 / 2020, page 49 / 78 41 / 65 of data using the first carrier is enabled or disabled, based on whether the cells included in the first carrier and / or the cells included in the second carrier are synchronized with each other or not.

[0170] Control section 301 can determine whether data transmission and / or reception using the first carrier is enabled or disabled, based on whether the first carrier and the second carrier belong to the same frequency band or not.

[0171] Control section 301 can judge whether data transmission and / or reception using the first carrier is enabled or disabled, based on capacity information relating to whether the measurement operation for the SSBs on the second carrier and the data transmission / reception operation on the first carrier affect each other or not.

[0172] The transmission signal generation section 302 generates downlink signals (downlink control signals, downlink data signals, downlink reference signals, and so on) based on commands from the control section 301 and transmits the downlink signals to the mapping section 303. The transmission signal generation section 302 may consist of a signal generator, a signal generation circuit, or a signal generation apparatus, which may be described based on the general understanding of the technical field to which this disclosure pertains.

[0173] For example, the transmission signal generation section 302 generates DL assignment to report downlink data assignment information and / or UL grant to report uplink data assignment information, based on commands from control section 301. DL assignment and UL grant are both DCI and follow the DCI format. For a downlink data signal, the Petition 870200112213, dated 03 / 09 / 2020, page 50 / 78 42 / 65 encoding processing and modulation processing are performed according to a coding rate, modulation scheme or similar determined based on the channel state information (CSI) of each user terminal 20.

[0174] Mapping section 303 maps downlink signals generated in transmission signal generation section 302 to radio data resources based on commands from control section 301 and transmits them to transmission / reception sections 103. Mapping section 303 may consist of a mapper, a mapping circuit or a mapping apparatus which may be described based on the general understanding of the technical field to which this disclosure pertains.

[0175] The received signal processing section 304 performs reception processes (e.g., demapping, demodulation, decoding, and so on) of received signals that are entered from the transmission / reception sections 103. Here, the received signals are, for example, uplink signals that are transmitted from the user terminals 20 (uplink control signals, uplink data signals, uplink reference signals, and so on). The received signal processing section 304 may consist of a signal processor, a signal processing circuit, or a signal processing apparatus, which may be described based on the general understanding of the technical field to which this disclosure pertains.

[0176] The received signal processing section 304 transmits the decoded information acquired through the reception processes to the control section 301. For example, if the received signal processing section 304 receives the PUCCH including the HARQ-ACK, the received signal processing section 304 transmits the HARQ-ACK to the control section 301. The section of Petition 870200112213, dated 03 / 09 / 2020, page 51 / 78 43 / 65 Received signal processing 304 transmits the received signals and / or the signals after the reception process to the measurement section 305.

[0177] Measurement section 305 conducts measurements with respect to received signals. Measurement section 305 may consist of a meter, a measurement circuit or measuring apparatus which may be described based on the general understanding of the technical field to which this disclosure pertains.

[0178] For example, measurement section 305 can perform RRM (Radio Resource Management) measurements, CSI (Channel State Information) measurements, and so on, based on the received signal. Measurement section 305 can measure received power (e.g., RSRP (Received Signal Reference Power)), received quality (e.g., RSRQ (Received Signal Reference Quality)), SINR (Signal-to-Noise Ratio), SNR (Signal-to-Noise Ratio), signal strength (e.g., RSSI (Received Signal Strength Indicator)), channel information (e.g., CSI), and so on. The measurement results can be output to control section 301. (User Terminal)

[0179] FIG. 13 is a diagram to show an example of a general structure of a user terminal according to one embodiment. A user terminal 20 includes a plurality of transmit / receive antennas 201, amplification sections 202, transmit / receive sections 203, a baseband signal processing section 204 and an application section 205. Note that the user terminal 20 can be configured to include one or more transmit / receive antennas 201, one or more amplification sections 202 and one or more transmit / receive sections 203.

[0180] The radio frequency signals that are received on the antennas of Petition 870200112213, dated 03 / 09 / 2020, page 52 / 78 44 / 65 transmission / reception 201 are amplified in amplification sections 202. Transmission / reception sections 203 receive the downlink signals amplified in amplification sections 202. Transmission / reception sections 203 convert the received signals into baseband signals through frequency conversion, and transmit the baseband signals to the baseband signal processing section 204. Transmission / reception sections 203 may consist of transmitters / receivers, transmission / reception circuits, or transmission / reception apparatus that may be described based on the general understanding of the technical field to which this disclosure pertains. Note that each transmission / reception section 203 may be structured as a transmission / reception section within an entity, or may consist of a transmission section and a reception section.

[0181] The baseband signal processing section 204 performs, on each incoming baseband signal, an FFT process, error correction decoding, a retransmission control reception process, and so on. Downlink user data is forwarded to application section 205. Application section 205 performs processes related to the upper layers above the physical layer and the MAC layer, and so on. In downlink data, broadcast information may also be forwarded to application section 205.

[0182] Meanwhile, uplink user data is fed from application section 205 to baseband signal processing section 204. Baseband signal processing section 204 performs a retransmission control transmission process (e.g., a HARQ transmission process), channel coding, precoding, a discrete Fourier transform (DFT) process, a Petition 870200112213, dated 03 / 09 / 2020, page 53 / 78 45 / 65 IFFT process and so on, and the result is forwarded to the transmission / reception sections 203.

[0183] The transmit / receive sections 203 convert the baseband signals emitted from the baseband signal processing section 204 to have a radio frequency band and transmit the result. The radio frequency signals having been subjected to frequency conversion in the transmit / receive sections 203 are amplified in the amplification sections 202 and transmitted from the transmit / receive antennas 201.

[0184] Note that each transmit / receive section 203 may further include an analog beamforming section that performs analog beamforming. The analog beamforming section may consist of an analog beamforming circuit (e.g., a phase shifter, a phase-shifting circuit) or an analog beamforming apparatus (e.g., a phase shifter) described based on the general understanding of the technical field to which the present invention pertains. The transmit / receive antenna 201 may consist of, for example, an array of antennas.

[0185] The transmit / receive section 203 transmits and / or receives data in a cell included in a carrier configured with SMTC. The transmit / receive section 203 can receive, from base radio station 10, information related to measurements of the same frequency and / or measurements of different frequencies and so on.

[0186] FIG. 14 is a diagram to show an example of a functional structure of the user terminal according to an embodiment. Note that the present example primarily shows functional blocks that relate to the characteristic parts of the present embodiment, and it is assumed that the user terminal 20 may include other functional blocks that are also Petition 870200112213, dated 03 / 09 / 2020, page 54 / 78 46 / 65 required for radio communication.

[0187] The baseband signal processing section 204 provided in the user terminal 20 includes at least one control section 401, one transmission signal generation section 402, one mapping section 403, one received signal processing section 404, and one measurement section 405. Note that these structures may be included in the user terminal 20, and some or all of the structures need not be included in the baseband signal processing section 204.

[0188] Control section 401 controls the entire user terminal 20. Control section 401 may consist of a controller, a control circuit or a control device which may be described based on the general understanding of the technical field to which this disclosure pertains.

[0189] Control section 401, for example, controls signal generation in the transmission signal generation section 402, signal mapping by the mapping section 403, and so on. Control section 401 controls signal reception processes in the received signal processing section 404, signal measurements in the measurement section 405, and so on.

[0190] Control section 401 acquires a downlink control signal and a downlink data signal transmitted from base radio station 10, from received signal processing section 404. Control section 401 controls the generation of an uplink control signal and / or an uplink data signal based on the results of determining whether or not retransmission control is required for a downlink control signal and / or a downlink data signal.

[0191] Control section 401 can perform control in which the digital BF in baseband signal processing section 204 (e.g., pre Petition 870200112213, dated 03 / 09 / 2020, page 55 / 78 47 / 65 encoding) and / or the analog BF in the transmit / receive section 203 (e.g., phase rotation) is used to form a transmit beam and / or a receive beam. The control section 401 can perform the control in which the beams are formed based on downlink channel information, uplink channel information, and so on. Channel information can be acquired from the received signal processing section 404 and / or the measurement section 405.

[0192] Control section 401 can judge, based on information for the SSB measurements for the second carrier (e.g., SMTC information), whether data transmission to and / or reception at a specific time (e.g., within the SMTC window) using the first carrier is enabled or disabled.

[0193] Control section 401 can determine whether data transmission and / or reception using the first carrier is enabled or disabled, based on whether the timings for SSB measurements (e.g., the SMTC window) overlap between the first carrier and the second carrier or not.

[0194] Control section 401 can determine whether data transmission and / or reception using the first carrier is enabled or disabled, based on whether the timings for SSB measurements (e.g., the SMTC window) overlap between the first carrier and the second carrier or not.

[0195] Control section 401 can determine whether data transmission and / or reception using the first carrier is enabled or disabled, based on whether the first carrier and the second carrier belong to the same frequency band or not.

[0196] Control section 401 can determine whether data transmission and / or reception using the first carrier is enabled or disabled, based on capacity information relating to whether the measurement operation for the Petition 870200112213, dated 03 / 09 / 2020, pp. 56 / 78 48 / 65 SSBs on the second carrier and the data transmission / reception operation on the first carrier affect each other or not.

[0197] If control section 401 acquires a variety of information reported by base radio station 10 from received signal processing section 404, control section 401 can update the parameters to be used for control based on the information.

[0198] The transmission signal generation section 402 generates uplink signals (uplink control signals, uplink data signals, uplink reference signals, and so on) based on commands from the control section 401, and transmits the uplink signals to the mapping section 403. The transmission signal generation section 402 may consist of a signal generator, a signal generation circuit, or a signal generation apparatus, which may be described based on the general understanding of the technical field to which this disclosure pertains.

[0199] For example, the 402 transmission signal generation section generates an uplink control signal based on transmission confirmation information, channel status information (CSI), and so on, based on commands from the 401 control section. The 402 transmission signal generation section generates uplink data signals based on commands from the 401 control section. For example, when a UL grant is included in a downlink control signal that is reported from base radio station 10, the 401 control section commands the 402 transmission signal generation section to generate the uplink data signal.

[0200] Mapping section 403 maps the uplink signals generated in transmission signal generation section 402 to radio resources, Petition 870200112213, dated 03 / 09 / 2020, pp. 57 / 78 49 / 65 based on commands from control section 401, and transmits the results to transmission / reception sections 203. Mapping section 403 may consist of a mapper, a mapping circuit, or a mapping apparatus, which may be described based on the general understanding of the technical field to which this disclosure pertains.

[0201] The received signal processing section 404 performs reception processes (e.g., demapping, demodulation, decoding, and so on) of received signals that are fed in from the transmission / reception sections 203. Here, the received signals are, for example, downlink signals transmitted from the base radio station 10 (downlink control signals, downlink data signals, downlink reference signals, and so on). The received signal processing section 404 may consist of a signal processor, a signal processing circuit, or a signal processing apparatus, which may be described based on the general understanding of the technical field to which this disclosure pertains. The received signal processing section 404 may constitute the reception section according to this disclosure.

[0202] The received signal processing section 404 transmits the decoded information acquired through the reception processes to the control section 401. The received signal processing section 404 transmits, for example, broadcast information, system information, RRC signaling, DCI, and so on, to the control section 401. The received signal processing section 404 transmits the received signals and / or the signals after the reception process to the measurement section 405.

[0203] Measurement section 405 conducts measurements in relation to the received signals. For example, measurement section 405 can perform, in a Petition 870200112213, dated 03 / 09 / 2020, pp. 58 / 78 50 / 65 or both of the first carrier and the second carrier, measurements of the same frequency and / or measurements of different frequencies using SSBs. The measurement section 405 may consist of a meter, a measurement circuit or measuring apparatus which may be described based on the general understanding of the technical field to which this disclosure pertains.

[0204] For example, measurement section 405 can perform RRM measurement, CSI measurement, and so on, based on the received signals. Measurement section 405 can measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR, etc.), signal strength (e.g., RSSI), channel information (e.g., CSI), and so on. The measurement results can be output to control section 401. (Hardware Structure)

[0205] Note that the block diagrams used to describe the embodiments above show blocks in functional units. These functional blocks (components) can be implemented in arbitrary combinations of hardware and / or software. Furthermore, the method for implementing each functional block is not particularly limited. That is, each functional block can be realized by a piece of apparatus that is aggregated physically and / or logically, or it can be realized by directly and / or indirectly connecting two or more physically and / or logically separate pieces of apparatus (wired and / or wirelessly, for example) and using this plurality of pieces of apparatus.

[0206] For example, a base radio station, a user terminal, and so forth, according to an embodiment of the present disclosure, may function as a computer that executes the processes of the radiocommunication method of the present disclosure. FIG. 15 is a diagram for Petition 870200112213, dated 03 / 09 / 2020, page 59 / 78 Figures 51 / 65 show an example of a hardware structure of the base radio station and user terminal according to one embodiment. Physically, the base radio stations 10 and user terminals 20 described above can each be formed as a computer apparatus that includes a processor 1001, a memory 1002, a storage 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 1006, a bus 1007 and so on.

[0207] Note that in the following description, the word apparatus can be interpreted as circuit, device, unit, and so forth. The hardware structure of the base radio station 10 and the user terminals 20 may be designed to include one or a plurality of apparatus shown in the drawings, or it may be designed to not include some of the apparatus parts.

[0208] For example, although only one processor 1001 is shown, a plurality of processors can be provided. Furthermore, processes can be implemented with one processor, or they can be implemented simultaneously, sequentially, or in different ways, with one or more processors. Note that processor 1001 can be implemented with one or more chips.

[0209] Each function of the base radio station 10 and the user terminals 20 is implemented, for example, by allowing given software (programs) to be read into hardware such as the processor 1001 and memory 1002, and by allowing the processor 1001 to perform calculations to control communication through the communication device 1004 and to read and / or write data in memory 1002 and storage 1003.

[0210] Processor 1001 controls the entire computer when it is running, for example, an operating system. Processor 1001 can be configured Petition 870200112213, dated 03 / 09 / 2020, pages 60 / 78 52 / 65 with a central processing unit (CPU), which includes interfaces with peripheral equipment, control equipment, computing equipment, a register, and so on. For example, the baseband signal processing section described above 104 (204), call processing section 105, and so on can be implemented by processor 1001.

[0211] Furthermore, processor 1001 reads programs (program codes), software modules, data, and so on from storage 1003 and / or communication device 1004, into memory 1002 and executes various processes accordingly. As for programs, programs are used to enable computers to perform at least some of the operations described above. For example, the control section 401 of each user terminal 20 can be implemented by control programs that are stored in memory 1002 and that operate on processor 1001, and other functional blocks can be implemented in the same way.

[0212] Memory 1002 is a computer-readable recording medium and may consist, for example, of at least one ROM (Read Only Memory), one EPROM (Erasable Programmable ROM), one EEPROM (Electrically Erasable EPROM), one RAM (Random Access Memory) and other suitable storage media. Memory 1002 may be referred to as a register, a cache, a main memory (primary storage device), and so on. Memory 1002 may store executable programs (program codes), software modules and the like to implement a radio communication method according to a modality.

[0213] Storage 1003 is a computer-readable recording medium and may consist, for example, of at least one floppy disk, a floppy disk (trademark), a magneto-optical disk (e.g., Petition 870200112213, dated 03 / 09 / 2020, pp. 61 / 78 53 / 65 a compact disc (CD-ROM (Compact Disc ROM) and so forth), a digital versatile disc, a Blu-ray disc (trademark)), a removable disc, a hard disk drive, a smartcard, a flash memory device (e.g., a card, a stick and a key drive), a magnetic stripe, a database, a server and / or other suitable storage media. Storage 1003 may be referred to as a secondary storage device.

[0214] The communication device 1004 is hardware (transmission / reception device) for enabling intercomputer communication via wired and / or wireless networks, and may be referred to as, for example, a network device, a network controller, a network card, a communication module, and so forth. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and so forth, in order to implement, for example, frequency division duplexing (FDD) and / or time division duplexing (TDD). For example, the transmission / reception antennas 101 (201), amplification sections 102 (202), transmission / reception sections 103 (203), communication path interface 106, and so forth, described above, may be implemented by the communication device 1004.

[0215] Input device 1005 is an input device that receives inputs from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, and so on). Output device 1006 is an output device that allows outputs to be sent to the outside (e.g., a display, a speaker, an LED (Light Emitting Diode) lamp, and so on). Note that input device 1005 and output device 1006 can be provided in an integrated structure (e.g., Petition 870200112213, dated 03 / 09 / 2020, pp. 62 / 78 54 / 65 a touch-sensitive panel).

[0216] Furthermore, these types of devices, including the processor 1001, the memory 1002 and others, are connected by a bus 1007 for information communication. The bus 1007 can be formed with a single bus or it can be formed with buses that vary between the device components.

[0217] Also, the base radio station 10 and the user terminals 20 can 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 all or part of the functional blocks can be implemented by the hardware. For example, the processor 1001 can be implemented with at least one of these hardware components. (Variations)

[0218] Note that the terminology used in this descriptive report and / or the terminology that is necessary to understand this descriptive report may be replaced by other terms that express the same or similar meanings. For example, channels and / or symbols may be replaced by signals (signaling). In addition, 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. Furthermore, a component carrier (CC) may be referred to as a cell, a frequency carrier, a frequency carrier, and so on.

[0219] Furthermore, a radio program can consist of one or a plurality of periods (programs) in the time domain. Each of one or a Petition 870200112213, dated 03 / 09 / 2020, pp. 63 / 78 55 / 65 plurality of periods (frames) that constitute a radio frame can be referred to as a subframe. Furthermore, a subframe can consist of one or a plurality of slots in the time domain. A subframe can be a fixed time length (e.g., 1 ms) independent of numerology.

[0220] Furthermore, a slot may consist of one or a plurality of time-domain symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, and so on). Furthermore, a slot may be a numerologically based unit of time. A slot may include a plurality of minislots. Each minislot may consist of one or a plurality of time-domain symbols. A minislot may be referred to as a subslot.

[0221] A radio frame, a subframe, a slot, a minislot, and a symbol all express units of time in signal communication. A radio frame, a subframe, a slot, a minislot, and a symbol may each be referred to by other applicable terms. For example, a subframe may be referred to as a transmission time interval (TTI), a plurality of consecutive subframes may be referred to as a TTI, or a slot or minislot may be referred to as a TTI. That is, a subframe and / or a TTI may be a subframe (1 ms) in existing LTE, may be a period shorter than 1 ms (e.g., 1 to 13 symbols), or may be a period longer than 1 ms. Note that the unit expressing TTI may be referred to as a slot, a minislot, and so on, instead of a subframe.

[0222] Here, a TTI refers to the minimum time unit of scheduling in radiocommunication, for example. For example, in LTE systems, a base radio station schedules the allocation of radio resources (such as Petition 870200112213, dated 03 / 09 / 2020, pp. 64 / 78 56 / 65 (as a frequency bandwidth and transmission power that are available to each user terminal) for the user terminal in TTI units. Note that the definition of TTIs is not limited to this.

[0223] TTIs can be transmission time units for channel-encoded data packets (transport blocks), code blocks and / or codewords, or they can be the processing unit in scheduling, link adaptation and so on. Note that when TTIs are given, the time range (e.g., the number of symbols) to which the transport blocks, code blocks and / or codewords are actually mapped may be shorter than the TTIs.

[0224] Note that, in the case where a slot or a minislot is referred to as a TTI, one or more TTIs (i.e., one or more slot s or one or more minislot s) may be the minimum scheduling time unit. Furthermore, the number of slot s (the number of minislots) that constitute the minimum scheduling time unit may be controlled.

[0225] A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8 to Rel. 12), 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 “minislot”, a “subslot”, and so on.

[0226] Note that a long TTI (e.g., a normal TTI, a subframe, and so on) can be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, and so on) can be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to, or longer than, 1 ms. Petition 870200112213, dated 03 / 09 / 2020, pp. 65 / 78 57 / 65

[0227] A feature block (RB) is the unit of resource allocation in the time domain and frequency domain, and may include one or a plurality of consecutive subcarriers in the frequency domain. In addition, an RB may include one or a plurality of symbols in the time domain, and may be a slot, a minislot, a subframe, or a TTI in length. A TTI and a subframe may each be composed of one or a plurality of feature blocks. Note that one or a plurality of RBs may be referred to as a physical feature block (PRB (Physical RB)), a subcarrier group (SCG), a feature element group (REG), a PRB pair, an RB pair, and so on.

[0228] Furthermore, a feature block can consist of one or a plurality of feature elements (REs). For example, an RE can correspond to a radio feature field of a subcarrier and a symbol.

[0229] Note that the radio frame, subframe, slot, minislot, symbol, and other structures described above are merely examples. For instance, structures such as the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and so on can be changed in various ways.

[0230] Also, the information, parameters, and so forth described in this descriptive report may be represented in absolute values ​​or in relative values ​​in relation to given values, or may be represented in other corresponding information. For example, radio features may be specified by index data. Petition 870200112213, dated 03 / 09 / 2020, pages 66 / 78 58 / 65

[0231] The names used for parameters and so forth in this descriptive report are by no means limiting. For example, as long as various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel) and so forth) and information elements can be identified by any suitable names, the various names assigned to these individual channels and information elements are by no means limiting.

[0232] The information, signals and / or other elements described in this descriptive report may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips and so forth, all of which may be referenced throughout the descriptive report contained in the present invention, may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons or any combination thereof.

[0233] Also, information, signals, and so on can be transmitted from upper layers to lower layers and / or from lower layers to upper layers. Information, signals, and so on can be inserted and / or transmitted through a plurality of network nodes.

[0234] The information, signals, and so on that are entered and / or emitted can be stored in a specific location (e.g., in memory) or can be managed using a management table. The information, signals, and so on to be entered and / or emitted can be overwritten, updated, or appended. The information, signals, and so on that are emitted can be deleted. The information, signals, and so on that are entered can be transmitted to another Petition 870200112213, dated 03 / 09 / 2020, pages 67 / 78 59 / 65 device.

[0235] Information reporting is by no means limited to the aspects / modalities described in this descriptive report, and other methods may also be used. For example, information reporting may be implemented using physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), upper layer signaling (e.g., RRC (Radio Resource Control) signaling), broadcast information (master information block (MIB), system information blocks (SIBs), and so on), MAC (Media Access Control) signaling, and so on) and other signals and / or combinations thereof.

[0236] Note that physical layer signaling may be referred to as “L1 / L2 control information (Layer 1 / Layer 2) (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 may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, and so on. In addition, MAC signaling may be reported using, for example, MAC control elements (MAC CEs).

[0237] Furthermore, the reporting of given information (for example, the report that “X maintains”) does not necessarily need to be reported explicitly, and can be reported implicitly (for example, by not reporting this given information or by reporting other pieces of information).

[0238] Determinations can be made using values ​​represented by a bit (0 or 1), they can be made using Boolean values ​​representing true or false, or they can be made by comparing numerical values ​​(by Petition 870200112213, dated 03 / 09 / 2020, pages 68 / 78 60 / 65 example, comparison against a given value).

[0239] Software, whether referred to as software, firmware, middleware, microcode, or hardware description language, or called by other names, should be interpreted broadly as instructions, instruction sets, code, code segments, program codes, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution queues, procedures, functions, and so forth.

[0240] Also, software, commands, information, and so forth, can be transmitted and / or received through communication media. For example, when software is transmitted from a website, server, or other remote sources by the use of wired technologies (coaxial cables, fiber optic cables, twisted-pair cables, digital subscriber lines (DSL), and so forth) and / or wireless technologies (infrared radiation, microwaves, and so forth), these wired and / or wireless technologies are also included in the definition of communication media.

[0241] The terms system and network as used in this descriptive report are used interchangeably.

[0242] In this descriptive report, the terms base station (BS), base radio station, eNB, gNB, cell, sector, cell group, carrier and component carrier may be used interchangeably. A base station may be referred to as a fixed station, NodeB, eNodeB (eNB), access point, transmit point, receive point, femto cell, small cell and so on.

[0243] A base station can accommodate one or a plurality of (e.g., three) cells (also referred to as sectors). When a station Petition 870200112213, dated 03 / 09 / 2020, pages 69 / 78 61 / 65 base 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 (e.g., small indoor base stations (RRHs (Remote Radio Heads))). The term cell or sector refers to part or all of the coverage area of ​​a base station and / or a base station subsystem that provides communication services within that coverage.

[0244] In this descriptive report, the terms mobile station (MS), user terminal, user equipment (UE) and terminal may be used interchangeably.

[0245] A mobile station may be referred to, by a person skilled in the art, as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or other appropriate terms in some cases.

[0246] Furthermore, the base radio stations in this descriptive report can be interpreted as user terminals. For example, each aspect / modality of this disclosure can be applied to a configuration in which communication between a base radio station and a user terminal is replaced by communication between a plurality of user terminals (D2D (Device to Device)). In this case, the 20 user terminals can have the functions of the 10 base radio stations described above. In addition, expressions such as uplink and downlink can be interpreted as lateral. For example, an uplink channel can be interpreted as a lateral channel. Petition 870200112213, dated 03 / 09 / 2020, pp. 70 / 78 62 / 65

[0247] Similarly, the user terminals in this descriptive report can be interpreted as base radio stations. In this case, base radio stations 10 can have the functions of the user terminals 20 described above.

[0248] Actions described in this descriptive report as being performed by a base station may, in some cases, be performed by higher-level nodes. In a network including one or a plurality of network nodes with base stations, it is clear that various operations performed to communicate with terminals may be performed by base stations, one or more network nodes (e.g., MMEs (Mobility Management Entities), S-GWs (Server Gateways), and so on, may be possible, but are not limiting), in addition to base stations, or combinations thereof.

[0249] The aspects / modalities illustrated in this descriptive report can be used individually or in combinations, which can be switched depending on the implementation mode. The order of processes, sequences, flowcharts, and so forth that have been used to describe the aspects / modalities contained in the present invention can be rearranged provided that no inconsistencies arise. For example, although several methods have been illustrated in this descriptive report with various step components in exemplary orders, the specific orders that are illustrated in the present invention are by no means limiting.

[0250] The aspects / modalities illustrated in this descriptive report can be applied 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), Nova-RAT (Radio Access Technology), NR (New Radio), NX (New Radio Access), FX (Future Generation Radio Access), GSM (brand) Petition 870200112213, dated 03 / 09 / 2020, pp. 71 / 78 63 / 65 (registered trademark) (Global System for Mobile Communications), CDMA 2000, UMB (Ultra Broadband Mobile), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra Wideband), Bluetooth (registered trademark), systems using other suitable radiocommunication methods and / or next-generation systems that are enhanced based on these.

[0251] The phrase “based on” (or “on the basis of”), as used in this descriptive report, does not mean “based solely on” (or “on the basis of only”), unless otherwise specified. In other words, the phrase “based on” (or “on the basis of”) means both “based solely on” and “based at least on” (on the basis of only and on the basis of at least).

[0252] Reference to elements with designations such as first, second, and so forth, as used in the present invention, generally does not limit the quantity or order of these elements. These designations may be used in the present invention only for convenience, as a method of 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 any way.

[0253] The term judge (determine), as used in the present invention, can encompass a wide variety of actions. For example, judge (determine) can be interpreted as meaning to make “judgments (determinations)” related to calculation, computation, processing, derivation, investigation, search (e.g., searching a table, a database, or other data structures), verification, and so forth. Furthermore, judge (determine) can be interpreted as meaning to make “judgments (determinations)” related to reception (e.g., reception). Petition 870200112213, dated 03 / 09 / 2020, pp. 72 / 78 64 / 65 of information), transmission (e.g., information transmission), input, output, access (e.g., accessing data in a memory), and so on. Furthermore, judging (determining), as used in the present invention, can be interpreted as meaning making “judgments (determinations)” related to resolution, selection, choice, establishment, comparison, and so forth. In other words, judging (determining) can be interpreted as meaning making judgments (determinations) related to some action.

[0254] The terms connected and coupled, or any variation of these terms as used in the present invention, mean all direct or indirect connections or couplings between two or more elements, and may include the presence of one or more intermediate elements between two elements that are connected or coupled to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, connection may be interpreted as access.

[0255] In this descriptive report, when two elements are connected, the two elements may be considered mutually connected or coupled by the use of one or more electrical wires, cables and / or printed electrical connections and, as some non-limiting and non-inclusive examples, by the use of electromagnetic energy with wavelengths in radio frequency regions, microwave regions, optical regions (both visible and invisible), or similar.

[0256] In this descriptive report, the phrase A and B are different can mean A and B are different from each other. The terms separate, be coupled, and so on can be interpreted similarly.

[0257] When terms such as including, comprising and their variations are used in this descriptive report or in the claims, these Petition 870200112213, dated 03 / 09 / 2020, pages 73 / 78 65 / 65 terms should be inclusive, similar to how the term "provide" is used. Furthermore, the term "or," as used in this descriptive report or in the claims, is not intended to be an exclusive disjunction.

[0258] Now, although the invention according to the present disclosure has been described in detail above, it should be obvious to a person skilled in the art that the invention according to the present disclosure is by no means limited to the embodiments described in this descriptive report. The invention according to the present disclosure can be implemented with various corrections and in various modifications, without departing from the spirit and scope of the invention, as defined by the recitations of the claims. Consequently, the description in this descriptive report is provided only for the purpose of explaining examples and should not, by any means, be interpreted as limiting the invention according to the present disclosure in any way.

Claims

CLAIMS 1. Terminal (20) comprising: a receiving section (203) configured to receive information relating to a measurement performed in a first server cell using a synchronization signal block (SSB); and a control section (401) configured to perform the measurement, characterized in that it is configured to determine whether the transmission or reception can be performed using a second server cell, at a specified timing, based on at least one of a measurement timing configuration window duration based on SSB, SMTC, and an SSB to be measured relative to the first server cell, wherein the specified timing is within the SMTC window duration.

2. Terminal (20), according to claim 1, characterized in that the determination of whether transmission or reception can be performed comprises determining whether transmission or reception of a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), and a reference signal can be performed.

3. Terminal (20), according to claim 1 or 2, characterized in that the control section (401) is configured to determine whether transmission or reception can be performed using the second server cell based on information related to whether an SSB index transmitted by a neighboring cell can be derived based on a timing of the first server cell. Petition 870250010734, dated 10 / 02 / 2025, p. 13 / 16 2 / 4 4. Terminal (20), according to any one of claims 1 to 3, characterized in that the control section (401) is configured to determine whether transmission or reception can be performed using the second server cell based on whether the first server cell and the second server cell belong to the same frequency band.

5. Terminal (20), according to any one of claims 1 to 4, characterized in that the receiving section (203) is configured not to perform an intrafrequency measurement in a cell in which a measurement object is not configured.

6. Terminal (20), according to any one of claims 1 to 5, characterized in that the control section (401) is configured to determine whether transmission or reception can be performed based on whether the terminal (20) is capable of concurrent processing of an SSB and at least one data and one control channel, each having different numerologies.

7. Radiocommunication method for a terminal (20) comprising: receiving information relating to a measurement performed in a first server cell using a synchronization signal block (SSB); performing the measurement; characterized in that the determination of whether transmission or reception can be performed using a second server cell, at a specified timing, is based on at least one of a measurement timing configuration window duration based on SSB, SMTC, and an SSB to be measured relative to the first server cell, wherein the specified timing is within the SMTC window duration.

8. Base station (10) comprising: transmitter (103) configured to transmit a synchronization signal block (SSB) in a first server cell, to a terminal (20); and a control section (301); characterized in that the control section (301) is configured to determine whether transmission to terminal (20) or reception from terminal (20) can be performed using a second server cell, at a specified timing, based on at least one of a measurement timing window duration based on SSB, SMTC, and an SSB to be measured relative to the first server cell, wherein the specified timing is within the SMTC window duration.

9. Base station (10), according to claim 8, characterized in that the determination of whether transmission or reception can be performed comprises determining whether transmission or reception of a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), and a reference signal can be performed.

10. Base station (10), according to claim 8 or 9, characterized in that the control section (301) is configured to determine whether transmission or reception can be performed using the second server cell based on information related to whether an SSB index transmitted by a neighboring cell can be derived based on a timing of the first server cell.

11. Base station (10), according to any of the claims Petition 870250010734, dated 10 / 02 / 2025, page 15 / 16 4 / 4 8 to 10, characterized in that the control section (301) is configured to determine whether transmission or reception can be performed using the second server cell based on whether the first server cell and the second server cell belong to the same frequency band.

12. Base station (10), according to any one of claims 8 to 11, characterized in that the control section (301) is configured to determine whether transmission or reception can be performed based on whether the terminal (20) is capable of concurrent processing of an SSB and at least one data and one control channel, each having different numerologies.

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