Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure includes a reception unit that receives information indicating one or more path loss reference signals, and a control unit that, based on the information, counts a number of activation durations of the path loss reference signals in a certain period, does not assume that the number is more than a certain value, and performs path loss estimation.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system. BACKGROUND

[0002] In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized for the purpose of further higher-speed data rates, lower delay, and so on (Non-Patent Literature 1). Further, LTE-Advanced (3GPP Rel. 10-14) has been standardized for the purpose of further larger capacity, higher density, and so on of LTE (3rd Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] A subsequent system of LTE (for example, also referred to as 5th generation mobile communication system (5G), 5G (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 onwards, and so on) is also being studied.

[0004] Prior Art Documents

[0005] Non-Patent Literature

[0006] 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

[0007] Problems to be Solved by the Invention

[0008] In a future wireless communication system (e.g., NR), a UE estimates path loss for uplink transmission using a path loss reference signal (PL-RS). The number of path loss estimates is limited. However, the counting method of path loss estimates is not clear. If the counting method of path loss estimates is not clear, path loss cannot be properly estimated, and there is a concern that this leads to a reduction in throughput, a reduction in communication quality, and the like.

[0009] Therefore, an object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that properly estimate path loss.

[0010] Means for solving the problem

[0011] A terminal according to an aspect of the present disclosure includes a reception unit that receives information indicating one or more path loss reference signals, and a control unit that, based on the information, counts the number of activated durations of the path loss reference signals in a certain period, does not assume that the number is more than a certain value, and performs path loss estimation.

[0012] Effects of the Invention

[0013] According to an aspect of the present disclosure, path loss can be properly estimated. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 FIG. 1 is a diagram illustrating an example of an activated duration of a CSI-RS resource.

[0015] Figure 2A and Figure 2B FIG. 2 is a diagram illustrating an example of a counting method of activated CSI-RS resources set for the same SCS.

[0016] Figure 3A and Figure 3B FIG. 3 is a diagram illustrating an example of a counting method of activated CSI-RS resources set for different SCSs.

[0017] Figure 4 FIG. 4 is a diagram illustrating an example of an activated duration of a PL-RS.

[0018] Figures 5A to 5C FIG. 5 is a diagram illustrating another example of an activated duration of a PL-RS.

[0019] Figure 6A and Figure 6B FIG. 6 is a diagram illustrating an example of a counting method of activated PL-RSs set for the same SCS.

[0020] Figure 7A and Figure 7Bis a diagram illustrating an example of a counting method of activated PL-RSs for different SCS settings.

[0021] Figure 8 is a diagram illustrating an example of an outline configuration of a wireless communication system according to an embodiment.

[0022] Figure 9 is a diagram illustrating an example of a configuration of a base station according to an embodiment.

[0023] Figure 10 is a diagram illustrating an example of a configuration of a user terminal according to an embodiment.

[0024] Figure 11 is a diagram illustrating an example of a hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION

[0025] (TCI, Spatial Relation, QCL)

[0026] In NR, it is under study to control at least one of reception processing (for example, at least one of reception, demapping, demodulation, decoding) and transmission processing (for example, at least one of transmission, mapping, precoding, modulation, coding) of a signal and a channel (expressed as signal / channel) in a UE based on a transmission configuration indication state (TCI state).

[0027] A TCI state can also indicate a state applied to a signal / channel of a downlink. What is equivalent to a TCI state applied to a signal / channel of an uplink can also be expressed as a spatial relation.

[0028] A TCI state is information related to quasi-co-location (QCL) of a signal / channel, and can also be referred to as spatial reception parameter, spatial relation information, and the like. A TCI state can also be set to a UE per channel or per signal.

[0029] The so-called QCL is an index indicating a statistical property of a signal / channel. For example, in the case where a certain signal / channel is in a QCL relationship with other signals / channels, it can also mean that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter) among the different signals / channels can be assumed to be the same (with respect to at least one of them being QCL).

[0030] In addition, the spatial reception parameter can also correspond to a reception beam (e.g., a reception analog beam) of the UE, and the beam can also be determined based on spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure can also be replaced by sQCL (spatial QCL).

[0031] With respect to QCL, a plurality of types (QCL types) can also be specified. For example, four QCL types, i.e., types A-D, can also be set, in which different parameters (or parameter sets) can be assumed to be the same, with respect to the parameters (which can also be referred to as QCL parameters) being represented as follows:

[0032] • QCL type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread,

[0033] • QCL type B (QCL-B): Doppler shift and Doppler spread,

[0034] • QCL type C (QCL-C): Doppler shift and average delay,

[0035] • QCL type D (QCL-D): Spatial reception parameter.

[0036] The case where the UE assumes that a certain control resource set (CORESET), channel, or reference signal is in a specific QCL (e.g., QCL type D) relationship with other CORESETs, channels, or reference signals can also be referred to as a QCL assumption.

[0037] The UE can also determine at least one of the transmission beam (Tx beam) and the reception beam (Rx beam) of a signal / channel based on the TCI state or QCL assumption of the signal / channel.

[0038] The TCI state may be, for example, information related to QCL between a channel (in other words, a reference signal (Reference Signal (RS)) for the channel) that becomes a target and other signals (for example, other RSs). The TCI state can also be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

[0039] The physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)).

[0040] The channel for which the TCI state or spatial relation is set (designated) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), or an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0041] Furthermore, the RS that is in a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a reference signal for measurement (Sounding Reference Signal (SRS)), a CSI-RS for tracking (also referred to as a Tracking Reference Signal (TRS)), or a reference signal for QCL detection (also referred to as a QRS).

[0042] The SSB is a signal block that includes at least one of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a broadcast channel (Physical Broadcast Channel (PBCH)). The SSB can also be referred to as an SS / PBCH block.

[0043] The RS of QCL Type X of the TCI state can also mean a RS in a QCL Type X relationship with (a DMRS of) a certain channel / signal, which can also be referred to as a QCL source of QCL Type X of the TCI state.

[0044] (path loss RS)

[0045] Path loss PL in the transmission power control of PUSCH, PUCCH, SRS respectively b,f,c (q d ) is an index q of a reference signal (RS, path loss reference RS) for a downlink BWP associated by the UE with the active UL BWP b of the carrier f of the serving cell c d is calculated. In the present disclosure, path loss reference RS, pathloss (PL)-RS, index q d , RS used in path loss calculation, RS resource used in path loss calculation can also be replaced with each other. In the present disclosure, calculation, estimation, measurement, tracking (track) can also be replaced with each other.

[0046] It is under study whether to change the existing mechanism of higher layer filtered RSRP (higher layer filtered RSRP) for path loss measurement in the case that the path loss RS is updated by MAC CE.

[0047] In case the pathloss RS is updated by MAC CE, L1-RSRP based pathloss measurement can also be applied. The higher layer filtered RSRP can be used for pathloss measurement at the available timing after the MAC CE for the update of the pathloss RS, L1-RSRP is used for pathloss measurement before the higher layer filtered RSRP is applied. The higher layer filtered RSRP can be used for pathloss measurement at the available timing after the MAC CE for the update of the pathloss RS, before which the higher layer filtered RSRP of the previous pathloss RS is used. It can also be that the higher layer filtered RSRP is used for pathloss measurement as in Rel. 15, the UE tracks all pathloss RS candidates set by RRC. The maximum number of pathloss RSs that can be set by RRC can also depend on the UE capability. In case the maximum number of pathloss RSs that can be set by RRC is X, the pathloss RS candidates below X can also be set by RRC, and from the set pathloss RS candidates, the pathloss RS is selected by MAC CE. The maximum number of pathloss RSs that can be set by RRC can also be 4, 8, 16, 64, etc.

[0048] In the present disclosure, the higher layer filtered RSRP, the filtered RSRP, the layer 3 filtered RSRP can be replaced with each other.

[0049] (Default TCI state / default spatial relation / default PL-RS)

[0050] In the RRC connected mode, in both cases that the TCI information in DCI (higher layer parameter TCI-PresentInDCI) is set to "enabled" and the TCI information in DCI is not set, in case that the time offset between the reception of the DL DCI (DCI scheduling PDSCH) and the corresponding PDSCH (PDSCH scheduled by the DCI) is less than the threshold (timeDurationForQCL) (application condition, first condition), if in case of non-cross carrier scheduling, the TCI state of the PDSCH (default TCI state) can also be the TCI state of the lowest CORESET ID in the latest slot in the active DL BWP of the (specific UL signal) CC. In case that is not, the TCI state of the PDSCH (default TCI state) can also be the TCI state of the lowest TCI state ID of the PDSCH in the active DL BWP of the scheduled CC.

[0051] In Rel. 15, each MAC CE for activation / deactivation of MAC CE for PUCCH spatial relation and MAC CE for activation / deactivation of SRS spatial relation is needed. PUSCH spatial relation follows SRS spatial relation.

[0052] In Rel. 16, at least one of MAC CE for activation / deactivation of PUCCH spatial relation and MAC CE for activation / deactivation of SRS spatial relation can not be used.

[0053] If both of spatial relation for PUCCH and PL-RS are not set in FR2 (application condition, second condition), default assumption of spatial relation and PL-RS for PUCCH is applied. If both of spatial relation for SRS (SRS resource for SRS or SRS resource corresponding to SRI within DCI format 0_1 scheduling PUSCH) and PL-RS are not set in FR2 (application condition, second condition), default assumption of spatial relation and PL-RS for PUSCH and SRS scheduled by DCI format 0_1 is applied.

[0054] If CORESET is set within activated DL BWP on the CC, default spatial relation and default PL-RS can also be TCI state or QCL assumption of CORESET with lowest CORESET ID within the activated DL BWP. If CORESET is not set within activated DL BWP on the CC, default spatial relation and default PL-RS can also be activated TCI state with lowest ID of PDSCH within the activated DL BWP.

[0055] In Rel. 15, spatial relation of PUSCH scheduled by DCI format 0_0 follows spatial relation of PUCCH resource with lowest PUCCH resource ID in activated spatial relation of PUCCH on the same CC. Even in case that PUCCH is not transmitted on SCell, network needs to update PUCCH spatial relation on all SCells.

[0056] In Rel. 16, PUCCH configuration for PUSCH scheduled by DCI format 0_0 is not needed. In case that activated PUCCH spatial relation on activated UL BWP within the CC does not exist or PUCCH resource does not exist (application condition, second condition) for PUSCH scheduled by DCI format 0_0, default spatial relation and default PL-RS are applied in the PUSCH.

[0057] The above threshold value can also be referred to as a QCL time length (time duration), "timeDurationForQCL", "Threshold", "Threshold for offset between a DCI indicating a TCI state and a PDSCH scheduled by the DCI", "Threshold-Sched-Offset", scheduling offset threshold, scheduling (scheduling) offset threshold, and the like.

[0058] (L1-RSRP measurement / reporting)

[0059] For each RS (each base station transmission beam) set by RRC, the UE measures the value of layer 1 (L1)-RSRP.

[0060] For each report of L1-RSRP, a measurement period indicating that L1-RSRP measurement needs to be completed within a few samples before is specified. If the number of samples used in RSRP measurement for one L1-RSRP report is set to M, the scaling factor considering overlap with SMTC or measurement gap (MG) is set to P, the scaling factor considering switching of UE receive beams is set to N, and the transmission period of SSB or CSI-RS is set to RS transmission period, the measurement period T in FR1 is expressed as MxPxRS transmission period, and the measurement period T in FR2 is expressed as MxNxPxRS transmission period. The time for one L1-RSRP measurement sample can also be NxPxRS transmission period.

[0061] In the case of L1-RSRP reporting based on CSI-RS, N = 1, in the case of L1-RSRP reporting based on SSB, N = 8, in the case of L1-RSRP reporting based on CSI-RS with repetition and the number of CSI-RS resources is less than the maximum number of receive beams (maxNumberRxBeam), N = ceil(maxNumberRxBeam / CSI-RS resource number).

[0062] (Counting of PL-RS)

[0063] Under study: In a case where a default PL-RS is activated for a part or all of PUCCH, SRS, and PUSCH scheduled by DCI format 0 0, in a case where the total number of PL-RSs set by RRC and default PL-RSs is not more than 4 (is 4 or less), all of these RSs are tracked, in a case where the total number of PL-RSs set by RRC and default PL-RSs is more than 4, the following PL-RS 1 to PL-RS 3 are tracked.

[0064] [PL-RS1]

[0065] For UL channels / signals for which MAC CE based PL-RS activation can be applied (if activated), a PL-RS activated by MAC CE.

[0066] [PL-RS2]

[0067] For UL channels / signals for which MAC CE based PL-RS activation cannot be applied, a PL-RS set by RRC. For example, configured grant PUSCH, periodic SRS, and the like are set.

[0068] [PL-RS3]

[0069] A default PL-RS.

[0070] On the other hand, the UE does not assume that all PUSCH / PUCCH / SRS transmissions are made while maintaining more than 4 path loss estimations per serving cell, except for SRS set by SRS positioning configuration (information element SRS-Positioning-Config).

[0071] Therefore, under study: In a case where the number of RS resources set by RRC for path loss estimation for PUCCH, PUSCH, and SRS among RS resources set for UL channels and signals for which MAC CE based activation of RS resources for path loss estimation can be applied is more than 4, the UE is not required to track RS resources that are not activated by MAC CE.

[0072] Under study: In a case where a RS resource for path loss estimation for PUSCH, PUCCH, or SRS is updated by MAC CE, in a case where the updated RS resource is one of RS resources tracked for path loss estimation for PUSCH / PUCCH / SRS, the UE applies the updated RS resource for path loss estimation for PUSCH / PUCCH / SRS from slot k + 3 · N slotsubframe,μ The RS resource is applied for the path loss estimation starting from the initial slot after that. Here, k is the slot in which the UE wants to transmit PUCCH or PUSCH with HARQ-ACK information for the PDSCH providing the MAC CE. μ is the SCS configuration for the PUCCH or PUSCH.

[0073] (Count of activated CSI-RS resources)

[0074] The UE does not assume that in any slot, there are more activated CSI-RS ports or activated CSI-RS resources than the number reported as capability. A non-zero power (NZP) CSI-RS is activated in the duration of time (activation duration, activated CSI-RS resource duration) defined as follows. For an aperiodic (A)-CSI-RS, the time starts from the end of the PDCCH containing the request and ends at the end of the PUSCH containing the report associated with the A-CSI-RS. Figure 1 For a semi-persistent (SP)-CSI-RS, the time starts from the end of the time the activation command is applied and ends at the end of the time the deactivation command is applied. For a periodic (P)-CSI-RS, the time starts from the time the P-CSI-RS is configured by higher layer signaling and ends at the time the P-CSI-RS configuration is released. Figure 1 If one CSI-RS resource is referenced by N CSI reporting settings, the CSI-RS resource and the CSI-RS ports within the CSI-RS resource are counted N times.

[0075] In a P-CSI-RS, it is counted as one activated CSI-RS resource regardless of whether the CSI-RS is received on OFDM symbols or not.

[0076] If CSI-RS resource 1 (CSI1) and CSI-RS resource 2 (CSI2) have the same SCS, consider the following Case 1 and Case 2.

[0077] [Case 1]

[0078] In slot n, the period during which CSI1 is activated and the period during which CSI2 is activated do not overlap Figure 2A CSI1 and CSI2 are counted as two activated CSI-RS resources.

[0079] [Case 2]

[0080] In the time slot n, the period during which CSI1 is activated and the period during which CSI2 is activated overlap in at least a part of Figure 2B ). CSI1 and CSI2 are counted as two activated CSI-RS resources.

[0081] If CSI-RS resource 1 (CSI1) and CSI-RS resource 2 (CSI2) have different SCS, consider the following Case 3 and Case 4.

[0082] [Case 3]

[0083] The period during which CSI1 is activated in one time slot in the small SCS setting (low SCS) of the two SCS settings, and the period during which CSI2 is activated in a plurality of time slots of the large SCS setting (high SCS) overlapping with the time slot do not overlap Figure 3A ). From the viewpoint of the small SCS setting, CSI1 and CSI2 are counted as two activated CSI-RS resources. From the viewpoint of the large SCS setting, CSI1 and CSI2 are counted as one activated CSI-RS resource. It is not specified which SCS is assumed for counting. In a more stringent case, the small SCS setting (a large number of activated CSI-RS resources) is preferable.

[0084] [Case 4]

[0085] The period during which CSI1 is activated in one time slot in the small SCS setting (low SCS) of the two SCS settings, and the period during which CSI2 is activated in a plurality of time slots of the large SCS setting (high SCS) overlapping with the time slot overlap in at least a part of Figure 3B ). From the viewpoint of the small SCS setting, CSI1 and CSI2 are counted as two activated CSI-RS resources. From the viewpoint of the large SCS setting, CSI1 and CSI2 are counted as two activated CSI-RS resources.

[0086] On the other hand, the counting method of the activated PL-RS is not clear. For example, even in the case where the maximum number of activated PL-RS is specified as 4, it is not clear how the activated PL-RS is counted. If the counting method of the activated PL-RS is not clear, the path loss cannot be properly estimated, and there is a concern that this leads to a decrease in throughput, a decrease in communication quality, and the like.

[0087] Therefore, the inventors of the present application have conceived a counting method of an activated PL-RS.

[0088] Hereinafter, the embodiments related to the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication method related to each embodiment can be applied individually or in combination.

[0089] In the present disclosure, "A / B", "at least one of A and B" can be replaced with each other. In the present disclosure, a cell, a CC, a carrier, a BWP, a DL BWP, a UL BWP, a band can be replaced with each other. In the present disclosure, an index, an ID, an indicator, a resource ID can be replaced with each other. In the present disclosure, an RRC parameter, a higher layer parameter, an RRC information element (IE), an RRC message can be replaced with each other.

[0090] In the present disclosure, "activate", "update", "indicate", "activate" (enable), "specify" can be replaced with each other.

[0091] In the present disclosure, the higher layer signaling can be, for example, any one of or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like.

[0092] The MAC signaling can be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), and the like. The broadcast information can be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), and the like.

[0093] (Wireless communication method)

[0094] <First embodiment>

[0095] The activation duration of the PL-RS (activation PL-RS duration, activation period, activation PL-RS period) is specified. The UE counts the number of activation durations for a certain time interval, and it is not assumed that more than X PL-RSs are activated at the same time (more than X activated PL-RSs).

[0096] The value of X can be specified by a specification, can be a value reported as a UE capability, and can be a value set by an RRC parameter. The value of X can be 4 or another value.

[0097] The time interval can be a slot (same as the counting method of activated CSI-RS resources) or another time interval (sub-slot, subframe, frame, symbol, etc.).

[0098] The UE does not assume that more than 4 path loss estimations per serving cell are maintained while transmitting all PUSCH / PUCCH / SRS except for SRS set by SRS positioning configuration (information element SRS-Positioning-Config).

[0099] If the UE can also not assume that, in any slot, more than 4 activated PL-RSs per serving cell for path loss estimation are maintained for all PUSCH / PUCCH / SRS transmissions in the case where the default PL-RS enabler is set. The PL-RS can also be activated in the duration of time (activation duration) as defined below. This time for MAC CE based PL-RS indication starts at the end of the application of the activation command (operation of application of the activation command) and ends at the end of the application of the deactivation command (operation of application of the deactivation command) Figure 4 ). This time for periodic PL-RS including the PL-RS of Rel. 15 starts when the periodic PL-RS is set by higher layer signaling and ends when the periodic PL-RS is released Figure 4 ).

[0100] The default PL-RS enabler can also be an RRC parameter for switching to the operation of Rel. 15. For example, the default PL-RS enabler can be at least one of default beam PL activation information for PUCCH (enableDefaultBeamPlForPUCCH), default beam PL activation information for SRS (enableDefaultBeamPlForSRS), and default beam PL activation information for PUSCH scheduled by DCI format 0_0 (enableDefaultBeamPlForPUSCH0_0).

[0101] The aforementioned "case where the default PL-RS enabler is set" can be replaced by the following conditions 1 or 2.

[0102] [Condition 1] A case where at least one of the following is satisfied (function of Rel. 16)

[0103] [Condition 2] A case where at least one of the following is satisfied

[0104] The MAC CE-based PL-RS indication can indicate both the default PL-RS and a PL-RS within a plurality of candidates (a list) of the PL-RS set by RRC.

[0105] The aforementioned “end when the deactivation command is applied” can also be replaced with the following timing 1 or 2.

[0106] [Timing 1] Slot k+3·N slot subframe,μ the first slot after Figure 5A Here, k can also be a slot in which the UE wants to transmit PUCCH or PUSCH having HARQ-ACK information for the PDSCH in which the MAC CE is provided. μ can also be a SCS configuration for the PUCCH or PUSCH.

[0107] [Timing 2] Slot k+3·N slot subframe,μ +T pathloss the first slot after Figure 5B Here, T pathloss may be a time for the Nth measurement sample of the RS resource, can be specified by a specification, can be set by an RRC parameter, and can be a value reported by UE capability information. The specific timing can be 2 ms, and can be another value.

[0108] The measurement sample can also be the aforementioned L1-RSRP measurement sample. The number of measurement samples N can be specified by a specification, can be set by an RRC parameter, and can be a value reported by UE capability information. N can be 5, and can be another value.

[0109] The aforementioned “end when the activation command is applied” can also be replaced with a specific timing before the end when the activation command is applied Figure 5C The specific timing can also be determined using at least one of a time T HARQ between the DL data transmission including the activation command and the positive acknowledgement (acknowledgement) therefor, and a fixed time specified by a specification.

[0110] The counting method of the activated PL-RS (activation duration) can also be based on the counting method of the activated CSI-RS resource.

[0111] If the PL-RS1 and the PL-RS2 have the same SCS, the activated PL-RS (activation duration) can also be counted by at least one of the following cases 1 and 2. The maximum number of PL-RS calculation (path loss estimation) per cell is 4, so case 1 and 2 can be either the case where the SCSs are different within the cell (the case where the SCSs of multiple BWPs within the cell are different), or not.

[0112] [Case 1]

[0113] In slot n, the period during which the PL-RS1 is activated (activation duration) and the period during which the PL-RS2 is activated (activation duration) do not overlap (). Figure 6A The PL-RS1 and the PL-RS2 are counted as two activated PL-RSs.

[0114] [Case 2]

[0115] In slot n, the period during which the PL-RS1 is activated and the period during which the PL-RS2 is activated overlap in at least a part (). Figure 6B The PL-RS1 and the PL-RS2 are counted as two activated PL-RSs.

[0116] If the PL-RS1 and the PL-RS2 have different SCSs, the activated PL-RS (activation duration) is counted by at least one of the following cases 3 and 4.

[0117] [Case 3]

[0118] The period during which the PL-RS1 is activated in one slot of the small SCS setting (low SCS) of the two SCS settings, and the period during which the PL-RS2 is activated in multiple slots of the large SCS setting (high SCS) that overlap with the slot do not overlap (). Figure 7A From the viewpoint of the small SCS setting, the PL-RS1 and the PL-RS2 are counted as two activated PL-RSs. From the viewpoint of the large SCS setting, the PL-RS1 and the PL-RS2 are counted as one activated PL-RS. As to which SCS is assumed for counting, it can not be specified. In a more stringent case, the small SCS setting (a large number of activated PL-RSs) is preferable.

[0119] [Case 4]

[0120] The period during which the PL-RS 1 in one slot of the small SCS setting (low SCS) of the two SCS settings is activated, and the period during which the PL-RS 2 in a plurality of slots of the large SCS setting (high SCS) overlapping with the slot is activated overlap in at least a part Figure 7B ) In the viewpoint of the small SCS setting, the PL-RS 1 and the PL-RS 2 are counted as two activated PL-RSs. In the viewpoint of the large SCS setting, the PL-RS 1 and the PL-RS 2 are counted as two activated PL-RSs.

[0121] According to the above first embodiment, the counting method of the activated PL-RS becomes clear.

[0122] (Wireless communication system)

[0123] Hereinafter, the structure of a wireless communication system to which an embodiment of the present disclosure relates will be described. In the wireless communication system, any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof is used to perform communication.

[0124] Figure 8 is a diagram illustrating an example of an outline structure of a wireless communication system to which an embodiment relates. The wireless communication system 1 can also be a system that realizes communication by Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), and the like standardized by the Third Generation Partnership Project (3GPP).

[0125] Further, the wireless communication system 1 can also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC) ). The MR-DC can include E-UTRA-NR Dual Connectivity (EN-DC) of LTE (Evolved Universal Terrestrial Radio Access (E-UTRA) ) and NR, NR-E-UTRA Dual Connectivity (NE-DC) of NR and LTE, and the like.

[0126] In EN-DC, a base station (eNB) of LTE (E-UTRA) is a Master Node (MN), and a base station (gNB) of NR is a Secondary Node (SN). In NE-DC, a base station (gNB) of NR is a MN, and a base station (eNB) of LTE (E-UTRA) is a SN.

[0127] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, both the MN and the SN are base stations (gNB) of NR (NR-NR Dual Connectivity (NN-DC))).

[0128] The wireless communication system 1 can also have a base station 11 that forms a macro cell C1 with a wide coverage, and base stations 12 (12a-12c) that are configured within the macro cell C1 and form small cells C2 that are narrower than the macro cell C1. The user terminal 20 can also be located within at least one cell. The configuration, number, and the like of the cells and the user terminal 20 are not limited to the manner shown in the drawing. Hereinafter, the base stations 11 and 12 are collectively referred to as base stations 10 without distinction.

[0129] The user terminal 20 can also be connected to at least one of the multiple base stations 10. The user terminal 20 can also use at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0130] Each CC can be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 can be included in the FR1, and the small cell C2 can be included in the FR2. For example, the FR1 can be a frequency band of 6 GHz or less (sub-6 GHz), and the FR2 can be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands, definitions, and the like of the FR1 and the FR2 are not limited to these, and for example, the FR1 can correspond to a frequency band higher than the FR2.

[0131] Furthermore, the user terminal 20 can use at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC to perform communication.

[0132] The plurality of base stations 10 can also be connected through wired (for example, optical fiber based on Common Public Radio Interface (CPRI), X2 interface, or the like) or wireless (for example, NR communication). For example, in a case where NR communication is utilized as a backhaul between the base stations 11 and 12, the base station 11 equivalent to an upper station can also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) can also be referred to as an IAB node.

[0133] The base station 10 can also be connected to the core network 30 via another base station 10 or directly. The core network 30 can also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), or the like.

[0134] The user terminal 20 can also be a terminal that supports at least one of LTE, LTE-A, 5G, or the like.

[0135] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) can also be utilized. For example, in at least one of Downlink (DL) and Uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like can also be utilized.

[0136] The wireless access scheme can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access schemes (for example, other single carrier transmission schemes, other multicarrier transmission schemes) can also be used in the wireless access schemes of UL and DL.

[0137] As a downlink channel, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared among the user terminals 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), and the like can also be used in the wireless communication system 1.

[0138] Further, as an uplink channel, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared among the user terminals 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), and the like can also be used in the wireless communication system 1.

[0139] User data, higher layer control information, a System Information Block (SIB), and the like are transmitted through the PDSCH. User data, higher layer control information, and the like can also be transmitted through the PUSCH. Further, a Master Information Block (MIB) can also be transmitted through the PBCH.

[0140] Lower layer control information can also be transmitted through the PDCCH. The lower layer control information can also contain, for example, downlink control information (Downlink Control Information (DCI)) containing scheduling information of at least one of the PDSCH and the PUSCH.

[0141] In addition, the DCI that schedules the PDSCH can also be referred to as a DL assignment, a DL DCI, and the like, and the DCI that schedules the PUSCH can also be referred to as an UL grant, an UL DCI, and the like. In addition, the PDSCH can also be replaced with DL data, and the PUSCH can also be replaced with UL data.

[0142] In the detection of the PDCCH, a control resource set (CORESET) and a search space can also be utilized. The CORESET corresponds to a resource in which the DCI is searched for. The search space corresponds to a search area of the PDCCH candidate and a search method. One CORESET can also be associated with one or a plurality of search spaces. The UE can also monitor the CORESET associated with a certain search space based on a search space setting.

[0143] One search space can also correspond to the PDCCH candidate equivalent to one or a plurality of aggregation levels. One or a plurality of search spaces can also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", and the like of the present disclosure can also be replaced with each other.

[0144] Uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (for example, also referred to as a hybrid automatic repeat request acknowledgement (HARQ-ACK), ACK / NACK, and the like), and a scheduling request (SR) can also be transmitted through the PUCCH. A random access preamble for establishing a connection with a cell can also be transmitted through the PRACH.

[0145] In addition, in the present disclosure, "downlink", "uplink", and the like can also be described without "link". Furthermore, "physical" can also be described without the beginning of various channels.

[0146] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like can also be transmitted. As the DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like can also be transmitted in the wireless communication system 1.

[0147] The synchronization signal can be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) can also be referred to as an SS / PBCH block, an SS block (SS Block (SSB)), or the like. In addition, the SS, the SSB, and the like can also be referred to as a reference signal.

[0148] Furthermore, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), and the like can also be transmitted. In addition, the DMRS can also be referred to as a user terminal-specific reference signal (UE-specific Reference Signal).

[0149] (Base station)

[0150] Figure 9is a drawing showing an example of a structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission path interface (transmission line interface) 140. Note that the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140 can each be provided more than one.

[0151] In this example, the functional blocks of the characteristic portions of the embodiment are mainly shown, and the base station 10 can also have other functional blocks required for wireless communication. Part of the processing of each unit described below can also be omitted.

[0152] The control unit 110 performs control of the entire base station 10. The control unit 110 can be configured by a controller, a control circuit, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0153] The control unit 110 can also control generation of signals, scheduling (for example, resource allocation, mapping), and the like. The control unit 110 can also control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140. The control unit 110 can also generate data, control information, a sequence, and the like transmitted as signals, and forward them to the transmission / reception unit 120. The control unit 110 can also perform call processing (setting, release, and the like) of a communication channel, state management of the base station 10, management of wireless resources, and the like.

[0154] The transmission / reception unit 120 can include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 can include a transmission processing unit 1211 and a reception processing unit 1212. The transmission / reception unit 120 can be configured by a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0155] The transmission / reception unit 120 can be configured as an integrated transmission / reception unit, or can be configured by a transmission unit and a reception unit. The transmission unit can be configured by the transmission processing unit 1211 and the RF unit 122. The reception unit can be configured by the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

[0156] The transmission / reception antenna 130 can be constituted by an antenna such as an array antenna, which can be explained based on common knowledge in the technical field to which the present disclosure pertains.

[0157] The transmission / reception unit 120 can also transmit the downlink channel, the synchronization signal, the downlink reference signal, and the like described above. The transmission / reception unit 120 can also receive the uplink channel, the uplink reference signal, and the like described above.

[0158] The transmission / reception unit 120 can also form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

[0159] The transmission / reception unit 120 (transmission processing unit 1211) can also generate a bit string to be transmitted, for example, by performing processing of a Packet Data Convergence Protocol (PDCP) layer, processing of a Radio Link Control (RLC) layer (for example, RLC retransmission control), processing of a Medium Access Control (MAC) layer (for example, HARQ retransmission control), and the like, with respect to data, control information, and the like acquired from the control unit 110.

[0160] The transmission / reception unit 120 (transmission processing unit 1211) can also perform transmission processing of channel coding (which can include error correction coding), modulation, mapping, filter processing (filtering processing), Discrete Fourier Transform (DFT) processing (as necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-analog conversion, and the like, with respect to the bit string to be transmitted, and output a baseband signal.

[0161] The transmission / reception unit 120 (RF unit 122) can also perform modulation to a wireless band, filter processing, amplification, and the like with respect to the baseband signal, and transmit a signal of the wireless band via the transmission / reception antenna 130.

[0162] On the other hand, the transmission / reception unit 120 (RF unit 122) can also perform amplification, filter processing, demodulation to a baseband signal, and the like with respect to a signal of the wireless band received by the transmission / reception antenna 130.

[0163] The transmission / reception unit 120 (reception processing unit 1212) can also apply, to the acquired baseband signal, reception processing such as analog-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as necessary), filter processing, demapping, demodulation, decoding (which can also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and the like, and acquire user data and the like.

[0164] The transmission / reception unit 120 (measurement unit 123) can also perform measurement related to the received signal. For example, the measurement unit 123 can also perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, and the like, based on the received signal. The measurement unit 123 can also perform measurement with respect to received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (for example, Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), and the like. The measurement result can also be output to the control unit 110.

[0165] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, and the like, and can also acquire, transmit, and the like, user data (user plane data), control plane data, and the like, for the user terminal 20.

[0166] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure can also be constituted by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0167] The transmission / reception unit 120 can also transmit information indicating one or more path loss reference signals. The control unit 110 can also count the number of activation durations of the path loss reference signal in a certain period based on the information, without assuming that the number is more than a certain value.

[0168] (user terminal)

[0169] Figure 10 Fig. 1 is a diagram illustrating an example of a structure of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. Note that one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 can be provided.

[0170] Note that in this example, functional blocks of the feature part in the present embodiment are mainly illustrated, and it is also assumed that the user terminal 20 has other functional blocks necessary for wireless communication. Part of the processing of each unit described below can also be omitted.

[0171] The control unit 210 performs control of the entire user terminal 20. The control unit 210 can be constituted by a controller, a control circuit, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0172] The control unit 210 can also control generation, mapping, and the like of a signal. The control unit 210 can also control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, a sequence, and the like transmitted as a signal, and forward them to the transmission / reception unit 220.

[0173] The transmission / reception unit 220 can include a baseband unit 221, an RF unit 222, a measurement unit 223. The baseband unit 221 can include a transmission processing unit 2211, a reception processing unit 2212. The transmission / reception unit 220 can be constituted by a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0174] The transmission / reception unit 220 can be constituted as an integrated transmission / reception unit, or can be constituted by a transmission unit and a reception unit. The transmission unit can be constituted by the transmission processing unit 2211 and the RF unit 222. The reception unit can be constituted by the reception processing unit 2212, the RF unit 222, and the measurement unit 223.

[0175] The transmission / reception antenna 230 can be constituted by an antenna, for example, an array antenna, and the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0176] The transmission / reception unit 220 can also receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transmission / reception unit 220 can also transmit the above-described uplink channel, uplink reference signal, and the like.

[0177] The transmission / reception unit 220 can also form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.

[0178] The transmission / reception unit 220 (transmission processing unit 2211), for example, can also generate a bit string to be transmitted by performing PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), and the like, with respect to data, control information, and the like acquired from the control unit 210.

[0179] The transmission / reception unit 220 (transmission processing unit 2211) can also output a baseband signal by performing channel coding (may also include error correction coding), modulation, mapping, filter processing, DFT processing (as necessary), IFFT processing, precoding, digital-analog conversion, and the like transmission processing with respect to the bit string to be transmitted.

[0180] In addition, whether or not to apply DFT processing can also be based on the setting of transform precoding. With respect to a certain channel (for example, PUSCH), in a case where transform precoding is effective (enabled), the transmission / reception unit 220 (transmission processing unit 2211) can also perform DFT processing as the above-described transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, and in a case where this is not so, the transmission / reception unit 220 (transmission processing unit 2211) can also not perform DFT processing as the above-described transmission processing.

[0181] The transmission / reception unit 220 (RF unit 222) can also transmit a wireless band signal via the transmission / reception antenna 230 by performing modulation to a wireless band, filter processing, amplification, and the like with respect to the baseband signal.

[0182] On the other hand, the transmission / reception unit 220 (RF unit 222) can also perform amplification, filter processing, demodulation to a baseband signal, and the like with respect to a wireless band signal received by the transmission / reception antenna 230.

[0183] The transmission / reception unit 220 (reception processing unit 2212) can also apply, to the acquired baseband signal, reception processing such as analog-digital conversion, FFT processing, IDFT processing (as necessary), filter processing, demapping, demodulation, decoding (which can include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and the like, to acquire user data and the like.

[0184] The transmission / reception unit 220 (measurement unit 223) can also perform measurement related to the received signal. For example, the measurement unit 223 can also perform RRM measurement, CSI measurement, and the like, based on the received signal. The measurement unit 223 can also perform measurement with respect to received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like. The measurement result can also be output to the control unit 210.

[0185] In addition, the transmission unit and the reception unit of the user terminal 20 in the present disclosure can also be constituted by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230.

[0186] The transmission / reception unit 220 can also receive, for one CSI report, channel state information (CSI) resource settings indicating a non-zero-power (NZP) CSI-reference signal (RS) resource for channel measurement and a CSI-interference measurement (IM) resource for interference measurement. The control unit 210 can also assume that, except for a case where the CSI report is for a layer 1-signal-to-interference-plus-noise ratio (SINR) report, the NZP CSI-RS resource for channel measurement and the CSI-IM resource for interference measurement are quasi co-located (QCLed) with respect to QCL Type D per resource.

[0187] The transmission / reception unit 220 can also receive information indicating one or more path loss reference signals. The control unit 210 can also count, based on the information, a number of activation durations of the path loss reference signal in a certain period, without assuming that the number is more than a certain value, and perform path loss estimation.

[0188] The activation duration can be from the end of an operation of application of an activation command of the path loss reference signal to the end of an operation of application of a deactivation command of the path loss reference signal.

[0189] The control unit 210 can also count the number of activation durations based on subcarrier spacing settings.

[0190] The certain period can be a slot.

[0191] (Hardware structure)

[0192] In addition, the block diagrams used in the description of the embodiments described above illustrate functional blocks of a block. These functional blocks (structural units) are realized by any combination of hardware and software, and the realization method of each functional block is not particularly limited. That is, each functional block can be realized by one device physically or logically integrated, or by a plurality of devices physically or logically separated and connected directly or indirectly (for example, by wire, wireless, or the like). Each functional block can be realized by combining the above one device or the above plurality of devices with software.

[0193] Here, among the functions, there are judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but are not limited to these. For example, a functional block (structural unit) that realizes a transmission function can also be referred to as a transmitting unit, a transmitter, or the like. Any one of these is as described above, and the realization method is not particularly limited.

[0194] For example, the base station, the user terminal, and the like in an embodiment of the present disclosure can also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 11 is a diagram illustrating an example of a hardware structure of a base station and a user terminal according to an embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0195] In addition, in the present disclosure, the terms of device, circuit, equipment, section, unit, and the like can be replaced with each other. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of each device illustrated in the diagram, or can be configured not to include a part of the devices.

[0196] For example, the processor 1001 is only illustrated one, but there can be a plurality of processors. Further, the processing can be executed by one processor, or the processing can be executed by two or more processors simultaneously, sequentially, or with other methods. In addition, the processor 1001 can be realized by one or more chips.

[0197] As for each function in the base station 10 and the user terminal 20, at least one of the operation by the processor 1001 and the control of the communication via the communication device 1004, or the control of the readout and the writing of the data in the memory 1002 and the storage 1003 is realized, for example, by reading a specific software (program) into the hardware such as the processor 1001, the memory 1002, and the like, and thereby the processor 1001 performs the operation and the control.

[0198] The processor 1001 causes, for example, an operating system to operate to control the entire computer. The processor 1001 can also be constituted by a central processing device (Central Processing Unit (CPU)) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, at least a part of the above-described control unit 110 (210), the transmission-reception unit 120 (220), and the like can also be realized by the processor 1001.

[0199] Further, the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processing according to them. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments can be used. For example, the control unit 110 (210) can also be realized by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be applied to other functional blocks.

[0200] The memory 1002 can also be a computer-readable recording medium such as at least one of a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), other appropriate storage medium. The memory 1002 can also be referred to as a register, a cache, a main storage (main storage device), and the like. The memory 1002 can hold a program (program code), a software module, and the like that can be executed in order to implement the wireless communication method related to an embodiment of the present disclosure.

[0201] The storage 1003 can also be a computer-readable recording medium such as at least one of a flexible disc, a floppy (registered trademark) disc, a magneto-optical disc (e.g., a compact disc read-only memory (CD-ROM) and the like), a digital versatile disc, a Blu-ray (registered trademark) disc), a removable disc, a hard disc drive, an intelligent disk (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and another appropriate recording medium. The storage 1003 can also be referred to as an auxiliary storage device.

[0202] The communication device 1004 is hardware (a transceiver device) for performing communication between computers via at least one of a wired network and a wireless network, also referred to as a network device, a network controller, a network card, a communication module, and the like. The communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). The above-described transceiver 120 (220), a transceiver antenna 130 (230), and the like can also be implemented by the communication device 1004. The transceiver 120 (220) can also be implemented by a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0203] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, and the like) that performs an output to the outside. In addition, the input device 1005 and the output device 1006 can also be a structure that is integrated (e.g., a touch panel).

[0204] Furthermore, the processor 1001, the memory 1002, and the like are connected through a bus 1007 for communicating information. The bus 1007 can be configured with a single bus, or different buses can be configured between the devices.

[0205] Furthermore, the base station 10 and the user terminal 20 can also be configured to include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), and the like hardware, and a part or all of the functional blocks can also be implemented using the hardware. For example, the processor 1001 can also be implemented using at least one of these hardware.

[0206] (Modified example)

[0207] In addition, the terms described in the present disclosure and the terms necessary for understanding the present disclosure can also be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (a signal or signaling) can also be replaced with each other. In addition, a signal can also be a message. A reference signal (RS) can also be simply referred to as RS, and can also be referred to as a pilot, a pilot signal, and the like depending on the applied standard. In addition, a component carrier (CC) can also be referred to as a cell, a frequency carrier, a carrier frequency, and the like.

[0208] A radio frame can also be constituted by one or more periods (frames) in the time domain. Each period (frame) constituting the one or more periods (frames) of the radio frame can also be referred to as a subframe. Further, a subframe can also be constituted by one or more slots in the time domain. A subframe can also be a fixed time length (for example, 1 ms) independent of numerology.

[0209] Here, numerology can also be a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, numerology can also indicate at least one of a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering processing performed by a transmitter-receiver in the frequency domain, a specific windowing processing performed by the transmitter-receiver in the time domain, and the like.

[0210] A slot can also be composed of one or a plurality of symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Further, a slot can also be a time unit based on a numerology.

[0211] A slot can also include a plurality of mini-slots. Each mini-slot can also be composed of one or a plurality of symbols in the time domain. Further, a mini-slot can also be referred to as a sub-slot. A mini-slot can also be composed of a smaller number of symbols than a slot. A PDSCH (or PUSCH) transmitted in a larger time unit than a mini-slot can also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot can also be referred to as PDSCH (PUSCH) mapping type B.

[0212] A radio frame, a subframe, a slot, a mini-slot, and a symbol each represent a time unit for transmitting a signal. A radio frame, a subframe, a slot, a mini-slot, and a symbol can also be referred to by other names respectively corresponding thereto. In addition, the time units of a frame, a subframe, a slot, a mini-slot, a symbol, and the like in the present disclosure can be replaced with each other.

[0213] For example, one subframe can also be referred to as a TTI, a plurality of consecutive subframes can also be referred to as a TTI, one slot or one mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in the existing LTE, can be a period shorter than 1 ms (for example, 1-13 symbols), or can be a period longer than 1 ms. In addition, a unit representing a TTI can not be referred to as a subframe, but can be referred to as a slot, a mini-slot, or the like.

[0214] Here, a TTI, for example, refers to a minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling in which a radio resource (a frequency bandwidth, a transmission power, and the like that can be used in each user terminal) is allocated to each user terminal in a TTI unit. In addition, the definition of a TTI is not limited thereto.

[0215] A TTI can also be a transmission time unit of a data packet (a transport block), a code block, a codeword, and the like that have been channel-encoded, and can also become a processing unit of scheduling, link adaptation, and the like. In addition, when a TTI is given, a time interval (for example, a number of symbols) to which a transport block, a code block, a codeword, and the like are actually mapped can be shorter than the TTI.

[0216] In addition, in a case where one slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) can also be a minimum time unit of scheduling. In addition, the number of slots (mini-slots) constituting the minimum time unit of scheduling can also be controlled.

[0217] A TTI having a time length of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a slot, etc. A TTI shorter than the normal TTI can also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

[0218] In addition, the long TTI (e.g., normal TTI, subframe, etc.) can also be replaced with a TTI having a time length of more than 1 ms, and the short TTI (e.g., shortened TTI, etc.) can also be replaced with a TTI having a TTI length shorter than the long TTI and a TTI length of 1 ms or more.

[0219] A resource block (Resource Block (RB)) is a resource allocation unit in a time domain and a frequency domain, and can also include one or more contiguous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in the RB can also be the same regardless of a numerology, for example, can also be 12. The number of subcarriers included in the RB can also be determined based on the numerology.

[0220] In addition, the RB can also include one or more symbols in the time domain, and can also be the length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. can also be constituted by one or more resource blocks, respectively.

[0221] In addition, one or more RBs can also be referred to as a physical resource block (Physical RB (PRB)), a subcarrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0222] In addition, a resource block can also be constituted by one or more resource elements (Resource Element (RE)). For example, one RE can also be a wireless resource area of one subcarrier and one symbol.

[0223] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can also be determined by the index of RBs based on the common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0224] A BWP can also include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs can also be set within a single carrier.

[0225] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Furthermore, terms such as "cell" and "carrier" in this disclosure can be replaced with "BWP".

[0226] Furthermore, the structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0227] Furthermore, the information, parameters, etc., described in this disclosure can be represented by absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0228] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical expressions, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name; therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0229] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0230] Furthermore, information, a signal, and the like can be output in at least one of physical (hard) and logical (soft) directions. Information, a signal, and the like can be input and output via a plurality of network nodes.

[0231] Information, a signal, and the like that are input and output can be stored in a specific location (for example, a memory) and can be managed using a management table. Information, a signal, and the like that are input and output can be overwritten, updated, or added. Information, a signal, and the like that are output can be deleted. Information, a signal, and the like that are input can be transmitted to another device.

[0232] The notification of information is not limited to the manners / embodiments described in the present disclosure, and can be performed using other methods. For example, the notification of information in the present disclosure can also be implemented by physical layer signaling (for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), high layer signaling (for example, Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), and the like), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0233] In addition, the physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like. Furthermore, the RRC signaling can also be referred to as an RRC message, and can also be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, and the like. Furthermore, the MAC signaling can also be notified using, for example, a MAC Control Element (CE).

[0234] Furthermore, the notification of specific information (for example, the notification of "X is") is not limited to explicit notification, and can also be performed implicitly (for example, by not performing the notification of the specific information, or by the notification of other information).

[0235] The determination can be made by a value represented by one bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values (for example, comparison with a specific value).

[0236] Software, regardless of being referred to as software, firmware, middle-ware, micro-code, hardware description language, or by other names, should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, and the like.

[0237] Furthermore, software, instructions, information, and the like can also be transmitted and received via a transmission medium. For example, in a case where software is transmitted from a website, a server, or other remote source using at least one of wired technologies (coaxial cable, optical fiber cable, twisted pair cable, Digital Subscriber Line (DSL), and the like) and wireless technologies (infrared rays, microwaves, and the like), the at least one of the wired technologies and the wireless technologies is included in the definition of the transmission medium.

[0238] The terms "system" and "network" used in the present disclosure can be used interchangeably. The "network" can also mean an apparatus (for example, a base station) included in the network.

[0239] In the present disclosure, the terms of “precoding”, “precoder”, “weight (precoding weight)”, “Quasi-Co-Location (QCL)”, “Transmission Configuration Indication state (TCI state)”, “spatial relation”, “spatial domain filter”, “transmission power”, “phase rotation”, “antenna port”, “antenna port group”, “layer”, “number of layers”, “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, “panel”, and the like can be used interchangeably.

[0240] In the present disclosure, the terms of “Base Station (BS)”, “wireless base station”, “fixed station”, “NodeB”, “eNB (eNodeB)”, “gNB (gNodeB)”, “access point”, “Transmission Point (TP)”, “Reception Point (RP)”, “Transmission / Reception Point (TRP)”, “panel”, “cell”, “sector”, “cell group”, “carrier”, “component carrier”, and the like can be used interchangeably. There is also a case where the base station is called with the terms of macro cell, small cell, femto cell, pico cell, and the like.

[0241] The base station can accommodate one or more (for example, three) cells. In the case where the base station accommodates a plurality of cells, the coverage area of the base station as a whole can be divided into a plurality of smaller areas, and each of the smaller areas can also be provided with a communication service by a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). The term of “cell” or “sector” refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides a communication service within the coverage.

[0242] In the present disclosure, the terms of “Mobile Station (MS)”, “user terminal”, “User Equipment (UE)”, “terminal”, and the like can be used interchangeably.

[0243] There are also instances where the mobile station is referred to as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a hand set, a user agent, a mobile client, a client, or by some other suitable terminology.

[0244] At least one of the base station and the mobile station can also be referred to as a transmission device, a reception device, a wireless communication device, or the like. In addition, at least one of the base station and the mobile station can also be a device mounted on a mobile body, a mobile body itself, or the like. The mobile body can be a vehicle (for example, a car, an airplane, or the like), a mobile body that moves in a unmanned manner (for example, a drone, an automated driving vehicle, or the like), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when a communication operation is performed. For example, at least one of the base station and the mobile station can also be a sensor or an Internet of Things (IoT) device.

[0245] Furthermore, the base station in the present disclosure can also be replaced with a user terminal. For example, for a structure in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, also referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), or the like), each of the modes / embodiments of the present disclosure can also be applied. In this case, a structure in which the user terminal 20 has the functions of the base station 10 described above can also be provided. Furthermore, the terms "uplink", "downlink", and the like can also be replaced with terms corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, and the like can also be replaced with a side channel.

[0246] Likewise, the user terminal in the present disclosure can also be replaced with a base station. In this case, a structure in which the base station 10 has the functions of the user terminal 20 described above can also be provided.

[0247] In the present disclosure, actions by a base station are sometimes also performed by its upper node depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, consider a Mobility Management Entity (MME), a Serving-Gateway (S-GW), and the like, but not limited to these), or a combination thereof.

[0248] The modes / embodiments explained in the present disclosure can be used individually, in combination, and also switched as execution proceeds. Furthermore, the processing procedure, sequence, flowchart, and the like of the modes / embodiments explained in the present disclosure can also be changed in order as long as there is no contradiction. For example, for the methods explained in the present disclosure, the elements of various steps are prompted using the order of the examples, but are not limited to the specific order prompted.

[0249] The modes / embodiments explained in the present disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer, a decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), a system using another appropriate wireless communication method, a next-generation system extended based thereon, and the like. Furthermore, a plurality of systems can also be combined (for example, LTE or LTE-A, in combination with 5G, and the like) to be applied.

[0250] The recitation "based on" used in the present disclosure does not mean "only based on" unless specifically written. In other words, the recitation "based on" means both "only based on" and "at least based on".

[0251] Any reference to an element or apparatus using a designation such as "first," "second," and so forth does not generally limit the quantity or order for or between these elements, nor does it limit them to these examples. These designations can be used herein as a convenience to distinguish between two instances (or instances in a series) of an element. Therefore, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.

[0252] The term "determining" as used in this disclosure can encompass a wide variety of actions. For example, "determining" can include calculating, computing, processing, deriving, investigating, looking up (such as looking up in a table, a database or another data structure), ascertaining and the like.

[0253] Determining can also include receiving (such as receiving information), accessing (such as accessing data in a memory), and the like. Determining can also include resolving, selecting, choosing, establishing and the like.

[0254] Determining can also include resolving, selecting, choosing, establishing and the like.

[0255] Determining can also be preceded by "determining" is interchanged with "assuming," "expecting," "considering," and the like.

[0256] The "maximum transmit power" described in this disclosure can mean a maximum value of a transmit power, can mean a nominal maximum transmit power (the nominal UE maximum transmit power), and can mean a rated maximum transmit power (the rated UE maximum transmit power).

[0257] The term "connected", "coupled" or all modifications thereof used in the present disclosure means all connections or couplings between two or more elements directly or indirectly, and can include a case where one or more intermediate elements exist between two elements "connected" or "coupled" to each other. The coupling or connection between elements can be physical, logical, or a combination thereof. For example, "connected" can be replaced with "accessed".

[0258] In the present disclosure, in a case where two elements are connected, one or more electric wires, cables, printed electric connections, and the like can be considered to be used, and electromagnetic energy having a wavelength of a radio frequency region, a microwave region, an optical (both visible and non-visible) region, and the like can be used as several non-limiting and non-inclusive examples to be "connected" or "coupled" to each other.

[0259] In the present disclosure, the term "A is different from B" can also mean "A and B are different from each other". In addition, the term can also mean "A and B are different from C, respectively". The terms "separated", "coupled", and the like can also be interpreted in the same way as "different".

[0260] In the present disclosure, in a case where "include", "including", and modifications thereof are used, these terms mean the same as the term "comprising" and are inclusive. Further, the term "or" used in the present disclosure does not mean the same as "exclusive or".

[0261] In the present disclosure, for example, in a case where an article is added by translation such as a, an, and the in English, the present disclosure can also include a case where a noun following the article is plural.

[0262] The above has been described in detail for the invention related to the present disclosure, but the invention related to the present disclosure is obviously not limited to the embodiments described in the present disclosure. The invention related to the present disclosure can be implemented as a modification and a change without departing from the gist and the scope of the invention determined based on the recitations of the claims. Therefore, the recitations of the present disclosure are for the purpose of illustrative explanation and do not have any limiting meaning on the invention related to the present disclosure.

[0263] This application is based on Japanese Patent Application No. 2020-078947 filed on April 28, 2020. The content of the application is incorporated herein in its entirety.

Claims

1. A terminal, comprising: The receiving unit receives an activation command for the path loss reference signal and a deactivation command for the path loss reference signal; and The control unit uses the time between sending DL data including the activation command and receiving a positive response to the DL data transmission, as well as a fixed time, to determine the timing for ending the operation of the application of the activation command, and based on the deactivation command, to determine the timing for ending the operation of the application of the deactivation command. The control unit determines the activation duration of the path loss reference signal based on the timing of the end of the operation of the activation command and the timing of the end of the operation of the deactivation command. The timing for ending the application of the deactivation command is after a specific time elapsed since the transmission of the HARQ-ACK message for the deactivation command. This specific time is obtained by adding the measurement time for the path loss reference signal to the three subframe times.

2. The terminal according to claim 1, wherein, The timing for ending the application of the deactivation command is based on the time of five measurement samples of the path loss reference signal.

3. A wireless communication method for a terminal, comprising: The steps of receiving the activation command of the path loss reference signal and the deactivation command of the path loss reference signal; The steps of determining the timing for ending the operation of the application of the activation command using the time between the DL data transmission including the activation command and the positive response to the DL data transmission, and a fixed time, and determining the timing for ending the operation of the application of the deactivation command based on the deactivation command; and The step of determining the activation duration of the path loss reference signal based on the timing of the end of the activation command application operation and the timing of the end of the deactivation command application operation. The timing for ending the application of the deactivation command is after a specific time elapsed since the transmission of the HARQ-ACK message for the deactivation command. This specific time is obtained by adding the measurement time for the path loss reference signal to the three subframe times.

4. A system having a terminal and a base station, wherein, The terminal has: The receiving unit receives the activation command and the deactivation command of the path loss reference signal. as well as The control unit uses the time between sending DL data including the activation command and receiving a positive response to the DL data transmission, as well as a fixed time, to determine the timing for ending the operation of the application of the activation command, and based on the deactivation command, to determine the timing for ending the operation of the application of the deactivation command. The control unit determines the activation duration of the path loss reference signal based on the timing of the end of the operation of the activation command and the timing of the end of the operation of the deactivation command. The timing for ending the application of the deactivation command is determined by a specific time elapsed after the transmission of the HARQ-ACK message for the deactivation command. This specific time is obtained by adding the measurement time for the path loss reference signal to three subframe times. The base station sends the activation command.

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