Terminal and communication method

Abstract

To provide a terminal and a communication method capable of appropriately determining whether a slot for receiving a CSI-RS (channel state information reference signal) is valid or not.SOLUTION: A terminal includes: a communication part for receiving a downlink control signal and a channel state information reference signal; and a control part for executing measurement regarding the channel state information, or suspending transmission / reception by the communication part during a measurement period regarding radio resource control then executing the measurement regarding the radio resource control, according to the channel state information reference signal. The control part determines whether a slot for receiving the channel state information reference signal is valid or not based on an instruction of the downlink control signal, executes measurement regarding the channel state information if the slot is valid, and executes measurement regarding the radio resource control if the slot is not valid.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a terminal and a communication method. [Background technology]

[0002] The 3rd Generation Partnership Project (3GPP (registered trademark)) has developed specifications for the 5th generation mobile communication system (also known as 5G, New Radio (NR) or Next Generation (NG)), and is also developing specifications for the next generation, known as Beyond 5G, 5G Evolution or 6G.

[0003] For 5G, technologies that satisfy the requirements such as a large-capacity system, high-speed data transmission speed, low latency, simultaneous connection of a large number of terminals, low cost, and low power consumption are being considered (for example, Non-Patent Document 1).

[0004] The expansion of mobile communication systems as described above is expected to lead to the use and spread of XR (extended reality), such as VR (virtual reality), AR (augmented reality), and MR (mixed reality), which enable the combination of the real world and the virtual world (virtual content). 3GPP is currently discussing XR expansion in preparation for Release 19 (see, for example, Non-Patent Document 2).

[0005] In 5G, when checking the reception quality of surrounding cells, Radio Resource Management (RRM) measurements are performed between or within frequencies, and a terminal suspends data transmission and reception for a certain period of time, known as a "Measurement Gap (MG)." However, during this RRM measurement, restrictions are imposed on the terminal's transmission and reception, which can impede real-time communications such as XR applications. For this reason, the 3GPP Work Item Description (WID) is discussing extensions to enable flexible data transmission and reception for XR, even under the transmission and reception gaps and scheduling restrictions caused by RRM measurements (see, for example, §4.1 of Non-Patent Document 3).

[0006] Prior to communication, a terminal measures channel quality using a reference signal to understand the state of the surrounding wireless channel. However, due to transmission / reception gaps caused by RRM measurement and scheduling restrictions, the terminal cannot receive the CSI Reference Signal (CSI-RS) for reporting Channel-State Information (CSI). Therefore, slots (downlink slots) included in measurement gaps where RRM measurement is configured are excluded from the "valid slots" for receiving the CSI-RS. The current standard defines such "valid downlink slots." [Prior art documents] [Non-patent literature]

[0007] [Non-Patent Document 1] 3GPP TS 38.300 V17.6.0 (2023-09) [Non-patent document 2] “Moderator's summary for REL-19 RAN2 topic Enhancements for XR”, RP-232619, 3GPP TSG-RAN Meeting #101, 3GPP, September 2023 [Non-patent document 3] “New WID: XR (eXtended Reality) for NR Phase 3”, RP-234080, 3GPP TSG-RAN Meeting #102, 3GPP, December 2023 [Non-patent document 4] 3GPP TS 38.133 V18.5.0 (2024-03) [Non-Patent Document 5] 3GPP TS 38.214 V18.5.0 (2024-12) Summary of the Invention

[0008] At the 3GPP RAN1 meeting (#120), it was agreed to add a 1-bit field as an explicit indication of DCI (Downlink Control Information) to skip the above-mentioned gap / restriction.

[0009] If the DCI allows skipping / cancellation of configured measurement gaps / restriction occasions, the UE may be able to receive (measure) the CSI-RS for CSI reporting during the configured measurement gaps / restriction occasions. Therefore, based on this agreement, the definition of "valid downlink slot" in the current standard needs to be changed.

[0010] One aspect of the present disclosure provides a terminal and a communication method that appropriately determine whether a slot for receiving CSI-RS (Channel State Information Reference Signal) is valid by clarifying the definition of a "valid downlink slot" with respect to CSI-RS.

[0011] A terminal according to one aspect of the present disclosure includes a communication unit that receives a downlink control signal and a channel state information reference signal, and a control unit that performs measurements related to channel state information using the channel state information reference signal, or suspends transmission and reception by the communication unit during a measurement period related to radio resource control and performs measurements related to radio resource control. The control unit determines whether a slot for receiving the channel state information reference signal is valid based on an instruction from the downlink control signal, and if the slot is valid, performs measurements related to the channel state information, or if the slot is not valid, performs measurements related to radio resource control. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram illustrating an example of a wireless communication system according to an embodiment of the present disclosure. [Figure 2] FIG. 1 is a diagram illustrating an example of a frequency range used in a wireless communication system according to an embodiment of the present disclosure. [Figure 3] 1A to 1C are diagrams illustrating exemplary configurations of radio frames, subframes, slots, and symbols used in a wireless communication system according to an embodiment of the present disclosure. [Figure 4] This is a diagram showing the agreements (excerpts) made at the RAN1#120 meeting. [Figure 5] FIG. 1 is a diagram illustrating the definition of "valid downlink slot" in TS38.214 (Non-Patent Document 5) §5.2.2.5. [Figure 6] A figure showing an example of skip and slot definition of measurement gap / restriction occasion by DCI according to an embodiment of the present disclosure. [Figure 7] FIG. 2 is a block diagram illustrating an example of a configuration of a base station according to an embodiment of the present disclosure. [Figure 8] FIG. 2 is a block diagram illustrating an example of a configuration of a terminal according to an embodiment of the present disclosure. [Figure 9] FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment according to one aspect of the present disclosure will be described with reference to the drawings.

[0014] (Embodiment) <Wireless communication system> 1 is a diagram illustrating an example of a wireless communication system 10 according to an embodiment of the present disclosure. The wireless communication system 10 is a wireless communication system conforming to 5G NR, and includes a Next Generation-Radio Access Network 20 (hereinafter, referred to as NG-RAN 20) and a terminal 200 (hereinafter, also referred to as UE (User Equipment) 200).

[0015] The wireless communication system 10 may be a wireless communication system conforming to a system called Beyond 5G, 5G Evolution, or 6G.

[0016] The NG-RAN 20 includes a base station 100A (hereinafter also referred to as gNB 100A) and a base station 100B (hereinafter also referred to as gNB 100B). When it is not necessary to distinguish between the gNB 100A, the gNB 100B, etc., they are collectively referred to as gNBs or base stations 100. Furthermore, the number of gNBs and UEs is not limited to the example shown in FIG. 1.

[0017] The NG-RAN 20 actually includes multiple NG-RAN nodes, specifically, gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). Note that the NG-RAN 20 and 5GC may simply be referred to as a "network." In the following description, the term "gNB" may be replaced with the term "network (NW)."

[0018] As an example, the gNB100A and the gNB100B are base stations conforming to 5G, and perform 5G wireless communication with the UE 200. The gNB100A, the gNB100B, and the UE 200 may support MIMO (Multiple-Input Multiple-Output), which generates a more directional beam BM by controlling radio signals transmitted from multiple antenna elements, carrier aggregation (CA), which uses a bundle of multiple component carriers (CC), and dual connectivity (DC), which performs communication between the UE and each of two NG-RAN nodes.

[0019] Furthermore, the wireless communication system 10 may support multiple frequency ranges (FR). Fig. 2 is a diagram showing an example of FRs used in the wireless communication system 10. As shown in Fig. 2, the wireless communication system 10 may support FR1, FR2-1, and FR2-2. The frequency bands of each FR are, for example, as follows: FR1: 410MHz ~ 7.125GHz FR2-1: 24.25GHz~52.6GHz ·FR2-2: More than 52.6GHz~71GHz

[0020] FR1 may use a sub-carrier spacing (SCS) of 15 kHz, 30 kHz, or 60 kHz, and a bandwidth (BW) of 5 to 100 MHz. FR2 is a higher frequency than FR1, and may use an SCS of 60 kHz or 120 kHz (including 240 kHz), and a bandwidth (BW) of 50 to 400 MHz.

[0021] Note that SCS may be interpreted as numerology, which is defined in Non-Patent Document 1 and corresponds to one subcarrier spacing in the frequency domain.

[0022] In FR2-2, to avoid an increase in phase noise, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) or Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) with a larger SCS may be applied.

[0023] Fig. 3 is a diagram showing an example of the configuration of a radio frame (system frame), subframe, and slot used in the radio communication system 10. As shown in Fig. 3, one slot is made up of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). However, the SCS is not limited to the interval (frequency) shown in Fig. 3. For example, 480 kHz, 960 kHz, etc. may be used as the SCS.

[0024] Furthermore, the number of symbols constituting one slot does not necessarily have to be 14 (for example, it may be 28 or 56 symbols, etc.) Furthermore, the number of slots per subframe may differ depending on the SCS.

[0025] The time direction (t) shown in Fig. 3 may be called a time domain, a symbol period, a symbol time, etc. The frequency direction may be called a frequency domain, a resource block, a subcarrier, a bandwidth part (BWP), etc.

[0026] The gNB100 transmits control information, configuration information, etc. to the UE200 as a downlink (DL) signal.

[0027] Also, for example, gNB100 receives control information, data signals, information regarding the processing capabilities of UE200 (terminal capabilities (information); for example, UE capability), etc. from UE200 as uplink (UL) signals.

[0028] Channels used for transmitting DL signals include, for example, data channels and control channels. For example, the data channel may include a physical downlink shared channel (PDSCH), and the control channel may include a physical downlink control channel (PDCCH). For example, the gNB 100 transmits control information to the UE 200 using the PDCCH, and transmits DL data signals using the PDSCH. Note that the PDSCH is an example of a downlink shared channel, and the PDCCH is an example of a downlink control channel. Note that the PDCCH may be interpreted as downlink control information (DCI), control information, etc. transmitted in the PDCCH.

[0029] The reference signal included in the DL signal may include, for example, at least one of a DMRS (Demodulation Reference Signal), a PTRS (Phase Tracking Reference Signal), a CSI-RS (Channel State Information - Reference Signal), an SRS (Sounding Reference Signal), and a PRS (Positioning Reference Signal) for positioning information. For example, reference signals such as the DMRS and PTRS are used to demodulate DL data signals and are transmitted using the PDSCH.

[0030] The UE 200 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable device, or an M2M (Machine-to-Machine) communication module.

[0031] UE200 utilizes various communication services provided by the wireless communication system 10 by receiving control signals or data signals from gNB100 in the DL and transmitting control signals or data signals to gNB100 in the UL. Also, UE200 receives various reference signals transmitted from gNB100 and performs measurements of the propagation path quality based on the reception results of the reference signals.

[0032] For example, UE200 receives control information, configuration information, etc. from gNB100 as a DL signal.

[0033] Also, for example, UE200 transmits control information, data signals, terminal capability information of UE200, etc. to gNB100 as a UL signal.

[0034] The channels used for transmitting UL signals include, for example, a data channel and a control channel. For example, the data channel may include a Physical Uplink Shared Channel (PUSCH), and the control channel may include a Physical Uplink Control Channel (PUCCH). For example, UE200 transmits control information using PUCCH and transmits UL data signals using PUSCH. Note that PUSCH is an example of an uplink shared channel, and PUCCH is an example of an uplink control channel. Note that PUSCH or PUCCH may be rewritten with uplink control information (UCI), control information, etc. transmitted in PUSCH or PUCCH.

[0035] The reference signals included in the UL signal may include, for example, at least one of DMRS, PTRS, CSI-RS, SRSRS, and PRS for position information. For example, reference signals such as DMRS and PTRS are used for demodulation of UL data signals and are transmitted using PUSCH.

[0036] <Discussion situation regarding XR> XR presents attractive use cases for future wireless communication systems. On the other hand, XR also poses issues that need to be considered and addressed. As one of them, in 3GPP, discussions on XR enhancements for Release 19 are underway (see, for example, Non-Patent Document 2), and extensive discussions are being held on enhancements related to Measurement Gap (MG) and scheduling limitations.

[0037] <Regarding SSB and SSB Measurement> Some of the signals and / or channels transmitted from the base station to the terminal are transmitted periodically. Examples of such signals and / or channels include Synchronization Signal Block (SSB).

[0038] SSB is used by the terminal for measurements (SSB measurements) such as received power (e.g., SS-RSRP (Synchronization Signal Reference Signal Received Power)) and received quality (e.g., SS-RSRQ (Synchronization Signal Reference Signal Received Quality)). Such measurements are an example of Radio Resource Management (RRM) measurements.

[0039] For SSB measurements, Timing Configuration for Measurement (SMTC) is notified to the terminal. SMTC may include the length, period, timing offset, etc. of the SSB measurement period (which may also be called the SMTC window, measurement timing, etc.). The terminal performs measurements based on the signal to be measured within the configured SMTC window.

[0040] Also, for switching the operating frequency (RF: Radio Frequency), etc., settings related to the measurement gap can be notified to the terminal for SSB measurement. The measurement gap is an extended period for measurement, to which an additional period can be added before and after the SMTC window. The settings related to the measurement gap may also include the length, period, etc.

[0041] Also, examples of RRM measurements include measurements based on CSI-RS (CSI-RS measurements).

[0042] In NR, the following RRM measurements with or without a measurement gap, including SSB measurements and CSI-RS measurements, are used. (1) Intra-frequency measurement (2) Inter-frequency measurement

[0043] The terminal can perform the above-described RRM measurements and signal transmission and reception using at least one of the first frequency band (FR1) and the second frequency band (FR2) (carrier frequency).

[0044] <Scheduling restrictions related to RRM measurement> Regarding intra-frequency SSB measurement, scheduling restrictions (terminal operation restrictions) related to intra-frequency SSB measurement without a measurement gap, intra-frequency SSB measurement with NCSG (Network Configured Small Gap), and intra-frequency SSB measurement with a measurement gap are described in the following locations in the current standard. · Intra-frequency SSB measurement without a measurement gap: clause 9.2.5.3 of Non-Patent Document 4 (briefly stated, scheduling restrictions are imposed on the SSB symbols measured within the SMTC window or all symbols within the SMTC window when the conditions are met) Intra-frequency SSB measurement with NCSG: clause 9.2.5.3 of Non-Patent Document 4 Intra-frequency SSB measurements with measurement gaps: Clause 9.1.2 of Non-Patent Document 4

[0045] Regarding inter-frequency SSB measurements, the scheduling restrictions (terminal operation restrictions) for inter-frequency SSB measurements without measurement gaps, inter-frequency SSB measurements with NCSG, and inter-frequency SSB measurements with measurement gaps are described in the following sections of the current standard. Inter-frequency SSB measurements without measurement gaps: Clause 9.3.5.3 of NR4 (in brief, if the condition is met, scheduling restrictions are imposed on SSB symbols measured within the SMTC window or on all symbols within the SMTC window) Inter-frequency SSB measurements with NCSG: Clause 9.3.10.3 of NCSG (in brief, if the condition is met, a scheduling restriction is imposed on the union of SSB symbols measured within the SMTC window for all Measurement Occasions (MOs) or the union of all symbols within the SMTC window for all MOs). Inter-frequency SSB measurements with measurement gaps: Clause 9.1.2 of Non-Patent Document 4

[0046] Regarding intra-frequency CSI-RS measurements, scheduling restrictions (terminal operation restrictions) regarding intra-frequency CSI-RS measurements without measurement gaps are described in the following sections of the current standard. Intra-frequency CSI-RS measurement without measurement gaps: Clause 9.10.2.6 of NRPL 4 (in brief, scheduling restrictions are imposed on configured CSI-RS symbols if the condition is met)

[0047] Regarding inter-frequency CSI-RS measurements, scheduling restrictions (terminal operation restrictions) regarding inter-frequency CSI-RS measurements with measurement gaps are described in the following sections of the current standard. Inter-frequency CSI-RS measurement with measurement gaps: Clause 9.1.2 of Non-Patent Document 4

[0048] Incidentally, the terminal may perform measurements for radio link monitoring, measurements for L1-RSRP, measurements for beam obstruction detection, and the like.

[0049] Due to the periodicity of XR traffic, if the SMTC window or measurement gap overlaps with the transmission and reception of signals related to XR traffic, the signals related to the XR traffic cannot be scheduled, which can lead to problems caused by the scheduling restrictions associated with RRM measurements, such as capacity loss.

[0050] The above-described problems may occur not only in signals related to XR traffic, but also in CSI-RS measurements and various other measurements including these measurements. The above-described problems may also occur in the transmission and reception of signals other than signals related to XR traffic.

[0051] Currently, extensions to scheduling constraints are being considered, but specific operations related to control to realize such extensions have not been fully considered.

[0052] Therefore, the following describes a proposal for reducing the influence caused by the scheduling restrictions on measurements (a proposal for relaxing the scheduling restrictions on measurements).

[0053] More specifically, a proposal is described regarding support for dynamic notification by DCI to skip (or disable) certain measurement gaps / RRM measurements / SMTC windows.

[0054] The following proposal will be explained assuming that the measurement gap is periodic. For example, the measurement gap (configuration) may be configured by an existing measurement gap configuration information element (e.g., MeasGapConfig IE), which is an RRC parameter, or a (new) information element similar to the existing information element, and the period of the measurement gap may be configured in such an information element.

[0055] The following proposals are also applicable to intra-frequency SSB and / or CSI-RS measurements and / or inter-frequency SSB and / or CSI-RS measurements involving measurement gaps / RRM measurements.

[0056] In the following proposal, the DCI is used to notify the user of skipping the measurement gap / RRM measurement. The operation of the user equipment 200 regarding skipping the measurement gap / RRM measurement may be based on the notification by the base station 100.

[0057] For example, when terminal 200 is notified by base station 100 to skip a measurement gap / RRM measurement, terminal 200 may receive / transmit DL / UL channels / signals without performing RRM measurement (and / or Positioning Reference Signal (PRS) measurement) in the measurement gap / RRM measurement.

[0058] The items described in the following proposals may be combined as appropriate as long as no contradictions arise.

[0059] In this application, the notation " / " may mean "and / or" unless otherwise specified.

[0060] Furthermore, in this application, the expression "receive / transmit will not be performed" may be interpreted as "receive / transmit will not be performed," "receive / transmit will be restricted," "receive / transmit will not be performed," "receive / transmit will not be performed," etc.

[0061] Furthermore, in this application, the expression "deactivate" may be read as "disable," "turn off," "put into an inactive (or disabled) state (disabled state, off state)," etc., and "enable" may be read as "enable," "turn on," "put into an active (or disabled) state (disabled state, off state)," etc.

[0062] In addition, in this application, the expression "notification" may be read as the expression "instruction."

[0063] In addition, in this application, signals such as SSB and CSI-RS used to measure received power, received quality, etc. may be referred to as measurement signals, measurement signals, etc.

[0064] In addition, in this application, "skipping ~" may be interpreted as "not performing measurements (e.g., RRM measurements) at ~," "assuming that scheduling restrictions do not apply at ~ (do not assume that scheduling restrictions apply)," etc.

[0065] In addition, in this application, "measurement gap occasion," "RRM measurement occasion," and "SMTC window occasion" may be abbreviated to "measurement gap," "RRM measurement," and "SMTC window," respectively. Also, "measurement gap / RRM measurement" may be abbreviated to "measurement gap, etc."

[0066] In this application, a measurement gap or the like (occasion) may also be referred to as an extended period or interval for measurement.

[0067] <Agreement> In the 3GPP RAN1#120 meeting, in connection with an extension that allows transmission and reception during gaps / restrictions due to RRM measurements, it was agreed to add a 1-bit field as an explicit indication of DCI to skip certain gaps / restrictions (see Figure 4).

[0068] As shown in FIG. 4, according to Alt 1-1 in the agreed matters, when it is shown that the measurement gap / limitation is skipped by an explicit instruction by DCI (a 1-bit field bit included as part of the scheduling DCI), transmission / reception (TX / RX) is considered valid in all Serving Cells within the applicable range of the skipped measurement gap / limitation.

[0069] Note that the "Applicable range" of the measurement gap / limitation is based on the RAN4 specification.

[0070] <Valid downlink slot in CSI reference resource definition> In Section 5.2.2.5 of Non-Patent Document 5, there is a description part surrounded by a dotted line regarding "CSI reference resource definition" (see FIG. 5). "Slots within the serving cell shall be considered valid downlink slots when they meet the following conditions: - Contain at least one downlink symbol or flexible symbol set by at least one upper layer, and - The slot does not fall within the configured measurement gap for the UE."

[0071] Among the above description, the second item: "The slot does not fall within the configured measurement gap for the UE." (hereinafter referred to as the definition of "valid downlink slot" or the "second condition") stipulates that when the reference slot for CSI reporting does not overlap with the time period (measurement gap) during which the physical layer reception is stopped for RRM measurement by the UE, the reference slot is a valid slot (a slot available for CSI reporting).

[0072] <Problem analysis> Rel-19 supports dynamic instructions for UEs to skip measurement gaps / restriction occasions (see, for example, Figure 6). As described above, in determining the CSI reference resource, in the definition of valid downlink slots (Section 5.2.2.5 of Non-Patent Document 5, Figure 5), slots corresponding to measurement gaps configured for the UE are excluded from "valid downlink slots" in consideration of the fact that the UE cannot receive CSI-RS for CSI reporting in measurement gaps / restriction occasions.

[0073] However, if the UE skips a measurement gap / restriction occasion due to the DCI instruction to skip the measurement gap / restriction occasion based on the above-mentioned agreement (3GPP RAN1#120 meeting, Figure 4), the UE may be able to receive the CSI-RS for CSI reporting in the measurement gap. Therefore, if the UE skips a measurement gap / restriction occasion, the definition of the "valid downlink slot" needs to be modified.

[0074] Therefore, in this embodiment, a solution is considered to modify the definition of "valid downlink slot" in the CSI reference resource definition in section 5.2.2.5 of Non-Patent Document 5 in order to support the specification of skipping measurement gaps / restriction occasions based on DCI indication.

[0075] <Proposal> Update the "valid downlink slot" definition in the CSI reference resource determination as shown in (Option 1) to (Option 9-3) below:

[0076] (Option 1) Delete the entire second item in Figure 5: "- it does not fall within a configured measurement gap for that UE."

[0077] In option 1, even if a slot corresponds to a measurement gap configured for the UE, the UE does not exclude the slot from the "valid downlink slots" (because the UE may skip the measurement gap / restriction occasion due to a skip instruction for the measurement gap / restriction occasion by the DCI), and the UE determines that the slot is a "valid downlink slot."

[0078] (Option 2) The second condition is updated to take into account the UE's capability to enable transmission / reception (TX / RX) during measurement gap scheduling restrictions.

[0079] In Option 2, a set of functions related to a specific "UE capability" of a UE is grouped, classified, and expressed by a Feature Group (FG). For example, if the UE is in FG64-1 or multiple FGs of any of DCI formats 0_1 / 1_1 / 0_2 / 1_2 / 0_3 / 1_3, it may be determined that the UE is capable of enabling transmission / reception even during measurement gap scheduling restrictions.

[0080] Option 2 is to change the second condition to: If the UE does not report support for the Enable Transmission / Reception During Measurement Gap Scheduling Restriction feature (if it does not support it), then the configured measurement gap is not applicable.

[0081] In option 2, if the UE does not report that it supports the function of enabling transmission / reception during measurement gap scheduling restriction (if it does not support it), the slots corresponding to the measurement gaps configured for the UE are excluded from the "valid downlink slots", and the UE determines that the slots are not "valid downlink slots".

[0082] (Option 3) Update the second condition to take into account whether the dynamic gap / limit occasion skip instruction is "configured."

[0083] Option 3 is to change the second condition to: "If the UE has not received an instruction to skip / cancel a measurement gap / restriction occasion via DCI, it does not fall under the configured measurement gap."

[0084] In option 3, if the DCI is configured to skip measurement gaps / restricted occasions, even if the slot corresponds to a measurement gap configured for the UE, the slot is not excluded from the "valid downlink slots", and the UE determines that the slot is a "valid downlink slot".

[0085] (Option 4) Update the second condition to take into account the applicability of skipping measurement gaps / restriction occasions defined in "RAN4".

[0086] In the aforementioned agreement, the "applicable range" of the measurement gap / limits is based on the RAN4 specifications, and the applicable range of the measurement gap / limits is based on the definition of RAN4.

[0087] Option 4 is to change the second condition to: "Does not fall within a configured measurement gap that is not subject to measurement gap / restriction skip instruction by DCI."

[0088] In option 4, the "applicable range" of the measurement gap / restriction is specified based on the RAN4 specification, and if a slot corresponding to the measurement gap configured for the UE is not subject to the measurement gap / restriction occasion skip indication by the DCI, the slot is excluded from the "valid downlink slots", and the UE determines that the slot is not a "valid downlink slot".

[0089] (Option 5) Update the second condition to take into account the applicability of skipping measurement gaps / restriction occasions defined in "RAN4" and "UE capability".

[0090] In other words, Option 5 is an option that combines the conditions of Option 2 and Option 4 mentioned above.

[0091] For option 5, change the second condition to: "Does not apply to configured measurement gaps that are not subject to measurement gap / restriction skip indication by DCI or configured measurement gaps when the UE does not report support for the functionality to enable transmission / reception during measurement gap scheduling restrictions (if it does not support it)."

[0092] In option 5, if the "applicable range" of the measurement gap / restriction is specified based on the RAN4 specification, and the slot corresponding to the measurement gap configured for the UE is not subject to the measurement gap / restriction occasion skip instruction by the DCI, or if the UE does not report support for the function to enable transmission / reception during measurement gap scheduling restriction (if it does not support it), the slot corresponding to the measurement gap configured for the UE is excluded from the "valid downlink slots", and the UE determines that the slot is not a "valid downlink slot".

[0093] (Option 6) Update the second condition to take into account the applicability of skipping measurement gaps / restriction occasions defined in "RAN4" and "configuration".

[0094] In other words, Option 6 is an option that combines the conditions of Option 3 and Option 4 mentioned above.

[0095] For option 6, change the second condition to: "Does not correspond to a configured measurement gap that is not subject to a DCI indication of skipping measurement gaps / restrictions / restriction occasions, or a configured measurement gap when a DCI indication of skipping measurement gaps / restrictions / restriction occasions is not configured in the UE."

[0096] In Option 6, the "applicable range" of the measurement gap / restriction is specified based on the RAN4 specification, and if the slot corresponding to the measurement gap configured for the UE is not subject to the measurement gap / restriction occasion skip instruction by the DCI, or if the measurement gap / restriction occasion skip instruction by the DCI is not configured for the slot corresponding to the measurement gap configured for the UE, the slot is excluded from the "valid downlink slots", and the UE determines that the slot is not a "valid downlink slot".

[0097] (Option 7) The second condition is updated based on the "explicit RRC configuration" of the CSI reference resource within the measurement gap.

[0098] For example, a new RRC parameter (e.g., CSI-Reference-InGap-r19) is configured to indicate whether the CSI reference resource corresponds to a relaxed (skipped / canceled) measurement gap.

[0099] For option 7, change the second condition to: If the parameter CSI-Reference-InGap-r19 (value "enabled" / "disabled") is not configured / is configured in the UE, it does not correspond to the configured measurement gap.

[0100] In Option 7, if the parameter CSI-Reference-InGap-r19 is not configured / configured for the UE, the slots corresponding to the measurement gaps configured for the UE are excluded from the "valid downlink slots", and the UE determines that the slots are not "valid downlink slots".

[0101] (Option 8) The second condition is updated based on the "explicit RRC configuration" of CSI reference resources within the measurement gap and the dynamic skip indication for the measurement gap / restricted occasion.

[0102] In other words, Option 8 is an option that combines the conditions of Option 3 and Option 7 described above, and the RRC parameters are the same as those of Option 7.

[0103] For option 8, change the second condition to: If the UE does not have / has configured the parameter CSI-Reference-InGap-r19 (value "enabled" / "disabled"), it does not fall within a configured measurement gap that is indicated by the DCI not to be skipped / cancelled.

[0104] In option 8, if the parameter CSI-Reference-InGap-r19 is not / is set for the UE, and if a measurement gap / restriction occasion skip indication by DCI is not set for a slot corresponding to a measurement gap configured for the UE, the slot is excluded from the "valid downlink slots", and the UE determines that the slot is not a "valid downlink slot".

[0105] (Option 9) Whether the CSI reference resource corresponds to a relaxed measurement gap depends on the capability of the UE.

[0106] The UE reports support for CSI reference resources falling within relaxed measurement gaps either as an independent UE capability or as a component of the UE capability to enable transmission / reception during measurement gap scheduling restrictions.

[0107] (Option 9-1) The second condition is updated based on the UE's capability regarding which CSI reference resources fall into the relaxed measurement gap.

[0108] For option 9-1, change the second condition to: If the UE does not report support for the CSI reference resource to fall within relaxed measurement gaps (if it does not support this), then it will not fall within the configured measurement gap.

[0109] In option 9-1, if the UE does not report that it supports the CSI reference resource corresponding to the relaxed measurement gap (if it does not support it), the slot corresponding to the measurement gap configured for the UE is excluded from the "valid downlink slots", and the UE determines that the slot is not a "valid downlink slot".

[0110] (Option 9-2) The second condition is updated based on the indication of dynamic skipping of measurement gaps / restricted occasions and the UE's capability regarding which CSI reference resources fall into relaxed measurement gaps.

[0111] In other words, Option 9-2 is an option that combines the conditions of Option 3 and Option 9-1 mentioned above.

[0112] For option 9-2, change the second condition to: "If the UE reports support for the CSI reference resource falling within relaxed measurement gaps (if supported), it does not fall within configured measurement gaps / restrictions that are not indicated to be skipped / cancelled by the DCI."

[0113] In option 9-2, if the UE reports support for a CSI reference resource corresponding to a relaxed measurement gap, even if the DCI does not configure a skip / cancel measurement gap / restricted occasion instruction for a slot corresponding to the measurement gap configured for the UE, the slot is excluded from the "valid downlink slots" and the UE determines that the slot is not a "valid downlink slot."

[0114] (Option 9-3) Option 9-3 is a variation of Option 7 / 8.

[0115] Explicit RRC configuration of CSI reference resources within measurement gaps in Option 7 / 8 should be done based on the UE's capability of which CSI reference resources fall within relaxed measurement gaps.

[0116] In other words, in option 9-3, the RRC parameters are "valid" only if the UE's capabilities are supported.

[0117] Option 9-3 is similar to options 7-8, except that the second condition is changed to: "If the parameter CSI-Reference-InGap-r19 (value "enabled" / "disabled") is not configured / is configured in the UE, it does not correspond to the configured measurement gap." or "If the UE does not configure / configures the parameter CSI-Reference-InGap-r19 (value "enabled" / "disabled"), it does not fall within the configured measurement gap / limit that is indicated by the DCI as not being skipped / cancelled."

[0118] In option 9-3, if the parameter CSI-Reference-InGap-r19 is not set / is set for the UE, the slots corresponding to the measurement gaps set for the UE are excluded from the "valid downlink slots", and the UE determines that the slots are not "valid downlink slots".

[0119] Alternatively, in option 9-3, if the parameter CSI-Reference-InGap-r19 is not / is set for the UE and a measurement gap / restriction occasion skip instruction by DCI is not set for a slot corresponding to a measurement gap configured for the UE, the slot is excluded from the "valid downlink slots" and the UE determines that the slot is not a "valid downlink slot".

[0120] (Variation) As a variation of this proposal, the specification in the standard may not change the definition of "valid downlink slot", and may define that the UE does not receive CSI-RS for CSI reporting in measurement gaps / limits that are skipped based on the indication of DCI.

[0121] (effect) According to this proposal, by appropriately reflecting the specification support for skipping / cancelling measurement gaps / restriction occasions based on DCI indications in the definition of "valid downlink slot" in the CSI reference resource definition in Section 5.2.2.5 of Non-Patent Document 5, the UE can appropriately determine whether the slot in which it receives CSI-RS (Channel State Information Reference Signal) is valid or not.

[0122] <UE capability> The UE capability indicating the capabilities of the terminal may include the following information indicating the capabilities of the terminal. Terminal 200 may report the following information indicating the capabilities of the terminal to base station 100. Note that the information indicating the capabilities of the terminal may correspond to information defining the capabilities of the terminal.

[0123] Information defining whether the terminal supports dynamic indication of skipping / cancellation of measurement gaps / restrictions by DCI Information defining whether the terminal supports dynamic indication of skipping / cancellation of measurement gaps / restrictions by means of a new DCI format Information defining whether the terminal supports dynamic indication of skipping / cancellation of measurement gaps / restrictions by new RNTI Information defining whether the terminal supports dynamic indication of measurement gaps / restrictions via DCI1_1 / 1_2 / 1_3 using scheduling PDSCH Information defining whether the terminal supports dynamic indication of skipping / cancellation of measurement gaps / restrictions by DCI0_1 / 0_2 / 0_3 due to PUSCH scheduling Information defining whether the terminal supports dynamic indication of measurement gaps / skipping / cancellation of RRM measurements by DCI2_4 with UL cancellation indication Information defining whether the terminal supports dynamic indication of skipping / cancellation of measurement gaps / restrictions by DCI1_1 / 1_2 / 1_3 without scheduling PDSCH Information defining whether the terminal supports dynamic indication of skipping / cancelling measurement gaps / restrictions via DCI0_1 / 0_2 / 0_3 without scheduling PUSCH Information defining whether the terminal supports dynamic indication of skipping / cancellation of multiple measurement gaps / restrictions Information defining whether the terminal supports dynamic indication of skipping / cancellation of discontinuous measurement gaps / restrictions

[0124] In the above description, an example has been described in which notifications, requests (skip patterns, etc.) for skipping measurement gaps / RRM measurements (occasions) are exchanged between base station 100 and terminal 200, but notifications, requests (skip patterns, etc.) for not skipping / cancelling measurement gaps / restrictions (occasions) may also be exchanged.

[0125] Next, the configurations of base station 100 and terminal 200 will be described. Note that the configurations of base station 100 and terminal 200 described below are examples of functions related to the present embodiment. Base station 100 and terminal 200 may have functions not shown. Furthermore, the functional divisions and / or names of functional units are not limited as long as the functions perform operations related to the present embodiment.

[0126] <Base station configuration> 7 is a block diagram showing an example of the configuration of base station 100 according to this embodiment. Base station 100 includes, for example, a transmitting unit 101, a receiving unit 102, and a control unit 103. Base station 100 communicates with terminal 200 (see FIG. 9) by radio.

[0127] Transmitter 101 transmits a downlink (DL) signal to terminal 200. For example, transmitter 101 transmits a DL signal (for example, the above-mentioned RRC, SIB, MAC CE, DCI, notification, confirmation, etc.) under the control of controller 103.

[0128] The DL signal may include, for example, a downlink data signal and control information (e.g., Downlink Control Information (DCI)). The DL signal may also include information indicating scheduling related to signal transmission of terminal 200 (e.g., an UL grant). The DL signal may also include control information of higher layers (e.g., control information of Radio Resource Control (RRC)). The DL signal may also include a reference signal.

[0129] Channels used for transmitting DL signals include, for example, a downlink data channel and a downlink control channel. For example, the downlink data channel may include a PDSCH (Physical Downlink Shared Channel), and the downlink control channel may include a PDCCH (Physical Downlink Control Channel). For example, base station 100 transmits downlink control information to terminal 200 using the PDCCH and transmits downlink data signals using the PDSCH.

[0130] The reference signal included in the DL signal may include at least one of a demodulation reference signal (Demodulation Reference Signal (DMRS)), a Phase Tracking Reference Signal (PTRS), a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information. For example, reference signals such as DMRS and PTRS are used for demodulating downlink data signals and are transmitted using the PDSCH.

[0131] The receiver 102 receives an uplink (UL) signal transmitted from the terminal 200. For example, under the control of the controller 103, the receiver 102 receives an UL signal (for example, the above-mentioned request, notification, etc.).

[0132] The transmitting unit 101 and the receiving unit 102 may be collectively referred to as a communication unit.

[0133] The control unit 103 controls the communication operations of the base station 100, including the transmission processing of the transmission unit 101 and the reception processing of the reception unit .

[0134] For example, the control unit 103 acquires information such as data and control information from the upper layer and outputs it to the transmitting unit 101. The control unit 103 also outputs the data, control information, etc. received from the receiving unit 102 to the upper layer.

[0135] For example, control unit 103 allocates resources (or channels) used for transmitting and receiving DL signals and / or resources used for transmitting and receiving UL signals based on signals (e.g., data and control information, etc.) received from terminal 200 and / or data and control information, etc. acquired from a higher layer. Information related to the allocated resources may be included in control information transmitted to terminal 200.

[0136] <Device configuration> 8 is a block diagram showing an example of the configuration of terminal 200 according to this embodiment. Terminal 200 includes, for example, receiving section 201, transmitting section 202, and control section 203. Terminal 200 communicates with base station 100, for example, wirelessly.

[0137] In relation to the above proposal, for example, the receiver 201 may receive, from the base station 100, first information (such as an RRC) regarding an extended period (such as a measurement gap occasion) for measurements (such as SSB measurements) using a measurement signal (such as an SSB). For example, the receiver 201 may receive, from the base station 100, second information (such as an RRC, SIB, MAC CE, or DCI) indicating that measurements will not be performed during a portion of the periodic extended period. For example, after receiving the second information, the receiver 201 may receive, from the base station 100, information (such as a MAC CE or DCI) indicating that measurements will be performed during another portion of the periodic extended period. The receiver 201 may receive a signal from the base station 100 during a portion of the periodic extended period.

[0138] The transmitter 202 transmits an UL signal to the base station 100. For example, under the control of the controller 203, the transmitter 202 transmits an UL signal (for example, the above-mentioned request, notification, etc.).

[0139] In relation to the above proposal, for example, the transmitter 202 may transmit a signal to the base station 100 during a portion of a periodic extended period (such as a measurement gap occasion) for measurements (such as SSB measurements) using a measurement signal (such as SSB).

[0140] The UL signal may include, for example, an uplink data signal and control information (e.g., UCI). For example, information related to the processing capability of terminal 200 (e.g., UE capability) may be included. The UL signal may also include a reference signal.

[0141] Channels used for transmitting UL signals include, for example, an uplink data channel and an uplink control channel. For example, the uplink data channel includes a PUSCH (Physical Uplink Shared Channel), and the uplink control channel includes a PUCCH (Physical Uplink Control Channel). For example, terminal 200 transmits uplink control information to base station 100 using the PUCCH and transmits uplink data signals using the PUSCH.

[0142] The reference signals included in the UL signal may include, for example, at least one of DMRS, PTRS, CSI-RS, SRS, and PRS. For example, the reference signals such as DMRS and PTRS are used for demodulating the uplink data signal and are transmitted using an uplink channel (for example, PUSCH).

[0143] The receiving unit 201 and the transmitting unit 202 may be collectively referred to as a communication unit.

[0144] The control unit 203 controls the communication operations of the terminal 200 , including the reception processing in the reception unit 201 and the transmission processing in the transmission unit 202 .

[0145] For example, the control unit 203 acquires information such as data and control information from a higher layer and outputs it to the transmitting unit 202. Also, the control unit 203 outputs, for example, the data and control information received from the receiving unit 201 to the higher layer.

[0146] For example, the control unit 203 controls transmission of information to be fed back to the base station 100. The information to be fed back to the base station 100 may include, for example, HARQ-ACK, Channel State Information (CSI), or a Scheduling Request (SR). The information to be fed back to the base station 100 may be included in UCI.

[0147] In relation to the above proposal, for example, the control unit 203 may periodically set an extended period (such as a measurement gap occasion) for measurements (such as SSB measurements) using a measurement signal (such as SSB) based on the first information. For example, the control unit 203 may not perform measurements based on the second information. The control unit 203 may determine a portion of the periodic extended period, and may not perform measurements during the determined portion of the periodic extended period.

[0148] Note that the channel used for transmitting the DL signal and the channel used for transmitting the UL signal are not limited to the above-mentioned examples. For example, the channel used for transmitting the DL signal and the channel used for transmitting the UL signal may include a Random Access Channel (RACH) and a Physical Broadcast Channel (PBCH). The RACH may be used to transmit Downlink Control Information (DCI) including a Random Access Radio Network Temporary Identifier (RA-RNTI), for example.

[0149] The above configuration can reduce the impact of scheduling restrictions on measurements.

[0150] <Applicable systems> Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including Long Term Evolution (LTE), LTE-Advanced (LTE-A), International Mobile Telecommunications-Advanced (IMT-Advanced), 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 5G-A (5G-Advanced), 6G (6th generation mobile communication system), xG (xth generation mobile communication system (x is, for example, an integer or a decimal), Future Radio Access (FRA), New Radio (NR), New radio access (NX), Future generation radio access (FX), Open Radio Access Network (O-RAN), Wideband Code Division Multiple Access (W-CDMA, registered trademark), Global System for Mobile communications (GSM, registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), and Institute of Electrical and Electronics Engineers (IEEE). 802.11, IEEE802.11x (where x is any character string such as b, a, g, n, ac, ax, be, or bn, and when x=n it is called Wi-Fi4, when x=ac it is called Wi-Fi5, when x=ax it is called Wi-Fi6 or Wi-Fi6E, when x=be it is Wi-Fi7, and when x=bn it is called Wi-Fi8, etc. Wi-Fi is a registered trademark.), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), network virtualization technology (e.g., NFV (Network Function Virtualization), SFC (Service Function Chaining), SDN (Software Defined Networking)), or LPWA (Low Power Wide Area). Furthermore, each aspect / embodiment described in the present disclosure may be applied to a system based on a combination of at least two of these technologies. Furthermore, "based on" naturally refers not only to a system that uses the technology, but also to a system that uses an extension or modification of the technology.

[0151] <Base station> In the present disclosure, any two terms selected from a set of terms such as "base station (BS)", "radio base station", "fixed station (fixed station)", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point (AP)", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "radio unit (RU)", "remote unit (RU)", "control unit (CU)", "distributed unit (DU)", "remote radio head (RRH)", "node", "gateway", "terrestrial base station", "stratospheric base station", "unmanned aerial vehicle", "high altitude platform station (HAPS)", "airborne platform", "panel", "cell", "radio access network (RAN)", and "network" may be used interchangeably. Each cell accommodated by a base station may be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, a serving cell, or a super cell. In the present disclosure, any two terms selected from a set of terms such as "cell," "sector," "cell group," "carrier," "component carrier," "cluster," "bandwidth part (BWP)," and "carrier bandwidth" may be used interchangeably.

[0152] <terminal> In the present disclosure, any two terms selected from the set of terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "Device", "Module" and "Terminal" may be used interchangeably.

[0153] A terminal may be referred to 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, router (e.g., home router, mobile router, etc.), TCU (Telematics Control Unit), or some other suitable terminology.

[0154] <Mobile object> The base station and the terminal may each be composed of one or more devices. The devices constituting at least a portion of the base station and the terminal may be called a transmitting device, a receiving device, a communication device, etc. Note that the devices constituting at least a portion of the base station and the terminal may be, for example, an object itself, such as a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, an excavator, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcar, a rickshaw, a ship and other watercraft, an airplane, a rocket, an unmanned aerial vehicle, a stratospheric base station (e.g., a High Altitude Platform Station (HAPS)), an artificial satellite (e.g., a Low Earth Orbit (LEO) satellite, a Medium Earth Orbit (MEO) satellite, a Geostationary Earth Orbit (GEO) satellite), a drone (registered trademark), a multicopter, a quadcopter, a balloon, or an Internet of Things (IoT) device (e.g., a smart meter, a sensor), or may include, but are not limited to, an object or device mounted on the object. Furthermore, the object may be a moving object (hereinafter referred to as a "moving object"; this does not exclude the case where the moving object is in a stationary state where it is not moving), or may be a fixedly positioned object (hereinafter referred to as a "non-moving object").

[0155] Furthermore, the base station in the present disclosure may be read as a terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals (which may be referred to as, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)) or communication of a non-terrestrial network (NTN). In this case, the UE 200 may be configured to have at least some of the functions of the gNB 100 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (e.g., "sidelink") or terms corresponding to NTN (e.g., feeder link or service link). For example, an uplink channel or a downlink channel may be read as a sidelink channel.

[0156] The present disclosure is also applicable to cases where at least some of the devices constituting the base station and the terminal operate outside the earth (for example, in the atmosphere or outer space).

[0157] In addition, the term "terminal" in the present disclosure may be interpreted as a base station. In this case, the gNB 100 may be configured to have the functions of the UE 200 described above.

[0158] <Hardware configuration, etc.> The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by hardware, software, or a combination of these. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized by using a single device that is physically or logically coupled, or may be realized by using two or more physically or logically separated devices that are connected directly or indirectly (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the single device or the multiple devices with software.

[0159] For example, a base station, a terminal, a network node, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 9 is a diagram illustrating an example of the hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. The gNB 100 and UE 200 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0160] In the present disclosure, the term "apparatus" may be interchangeable with any two terms selected from a set of terms such as "circuit," "device," "unit," "module," "chip," "means," etc. The hardware configurations of the gNB100 and the UE200 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0161] Each function in gNB100 and UE200 is realized by loading specified software (programs) onto hardware such as processor 1001, memory 1002, etc., so that processor 1001 performs calculations, controls communication by communication device 1004, and controls reading, writing, or both reading and writing of data in memory 1002 and storage 1003.

[0162] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned baseband signal processing unit 104, call processing unit 105, etc. may be realized by the processor 1001. Although only one processor 1001 is shown in the figure, there may be multiple processors.

[0163] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from the storage 1003, the communication device 1004, or both the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 401 of the UE 200 may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line, or may be provided to the computer via, for example, the communication device 1004.

[0164] The present disclosure also provides a computer program product including a computer program, which may implement the steps of the methods described in the above embodiments when the computer program is executed by a computer (e.g., the processor 1001).

[0165] The memory 1002 is a computer-readable recording medium and may be configured, for example, as a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or a combination of at least two of these. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), or the like. The memory 1002 can store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0166] Storage 1003 is a computer-readable recording medium, and may be, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, or a combination of at least two of these. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned storage medium may be, for example, memory 1002, storage 1003, or a database, server, or other appropriate medium including both memory 1002 and storage 1003.

[0167] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via a wired network, a wireless network, or both wired and wireless networks, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, or a combination of at least two of these. For example, the above-mentioned transmission / reception antenna 101, amplifier unit 102, transmission / reception unit 103, transmission path interface 106, etc. may be realized by the communication device 1004. The transmission / reception unit 103 may be implemented as a transmission unit 103a and a reception unit 103b that are physically or logically separated.

[0168] The input device 1005 is an input device that accepts input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, or a combination of at least two of these). The output device 1006 is an output device that outputs to the outside (for example, a display, a speaker, an LED lamp, or a combination of at least two of these). The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0169] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0170] Furthermore, the gNB 100 and the UE 200 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), a graphics processing unit (GPU), a neural processing unit (NPU), or a combination of at least two of these, and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0171] <Information notification, signaling> The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB))), other signals, or a combination of at least two of these. Note that the physical layer signaling may be referred to as Layer 1 (L1) control information. The MAC signaling may be referred to as a MAC Control Element (CE) or a MAC Protocol Data Unit (PDU), for example. Furthermore, the RRC signaling may be referred to as an RRC message or an information element (IE) in the RRC message. The RRC message may be, for example, a message used for controlling an RRC connection (for example, setup, reconfiguration, establishment, reestablishment, release, or resume), mobility, a measurement report, or notification of a terminal's capabilities, or may be an information element within the message. Furthermore, notification of information may be explicit or implicit. Note that explicit notification of certain information means notification of the certain information itself, and implicit notification of certain information may mean notification of information other than the certain information, or may mean that the certain information is considered to have been notified when a certain condition is satisfied.Furthermore, notification of information may include not only notification between the same layers of different devices (e.g., between a lower layer or an upper layer of the gNB100 and the UE200) but also notification between different layers in the same or different devices (e.g., between a lower layer and an upper layer in the gNB100 or the UE200). Notification of information from one device to another device may be performed via one or more devices. Regarding any information (e.g., a variable, a constant, a parameter, a setting) described in the present disclosure, even if not specifically stated in the above embodiments, information indicating / specifying (or relating to) the value of the any information may be notified from any first device (e.g., a terminal / base station) to any second device (e.g., a base station / terminal).

[0172] <Processing procedures, etc.> The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0173] <Base station operation> In the present disclosure, a specific operation described as being performed by a base station may be performed by its upper node or by some of its upper nodes (e.g., CU, RU, or DU, etc.) in some cases. It is clear that various operations performed for communication with a terminal in a RAN or core network may be performed by at least some of the base station and other network nodes other than the base station. The other network node may be one node or a combination of multiple nodes. The network node is, for example, a node provided in various core networks such as EPC (Evolved Packet Core) and 5GC (5G Core Network), and provides one or more network functions (NF: Network Functions), but is not limited to this.

[0174] Furthermore, in the present disclosure, the operation of "a terminal receives information from a base station" accompanies the operation of "the base station transmits the information to the terminal," "the base station generates the information," or both. Similarly, the operation of "a terminal transmits information to a base station" accompanies the operation of "the base station receives the information from the terminal." Furthermore, the operation of "a terminal is configured to ..." or "configure UE to ..." may include the operation of "a base station transmits configuration information regarding the configuration of the terminal" and the operation of "a terminal configures a predetermined operation based on the configuration information."

[0175] <Variations in form, etc.> Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched depending on the implementation.

[0176] The present disclosure has been described above, but it is for illustrative purposes only, and the present invention is not limited to the aspects / embodiments described in the present disclosure. The present disclosure can be implemented in modified and altered forms without departing from the spirit of the invention. The present disclosure and its modifications and alterations are included in the scope of the present invention and its equivalents.

[0177] <"First", "Second"> As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0178] <Radio resource definition> The radio resource may be defined by a combination of resource units in one or more domains, such as the time domain, the frequency domain, the spatial domain, the code domain, and the power domain.

[0179] For example, resources in the time domain may be defined by one or more time units. The one or more time units may include, but are not limited to, a radio frame, a subframe, a slot, a symbol, a transmission time interval (TTI), or a combination of at least two of these. The time unit may be a fixed-length time unit independent of numerology, a variable-length time unit dependent on numerology, or both. Examples of fixed-length time units include, but are not limited to, a subframe consisting of one or more slots and a radio frame including multiple subframes. Examples of variable-length time units include, but are not limited to, a symbol and a slot including a fixed number of symbols. A certain time unit may be divided into shorter time units. Examples of shorter time units include, but are not limited to, a minislot consisting of fewer symbols than the number of symbols constituting a slot. The above-described time units may include, for example, time units used as units for scheduling, link adaptation, etc. Furthermore, any time unit in the present disclosure may be read as another time unit.

[0180] Numerology is a parameter that defines the physical layer structure, and may be a parameter based on at least one of subcarrier spacing (SCS), symbol length, cyclic prefix length, and sampling time, for example.

[0181] Resources in the frequency domain may be defined, for example, by one or more frequency units. The one or more frequency units may include, for example, subcarriers, resource blocks (RBs), bandwidth parts (BWPs), carrier bandwidths, or a combination of at least two of these, but the terminology of the frequency units is not limited to these. The number of subcarriers included in a frequency unit may be a fixed number regardless of numerology, or may be a variable number that changes depending on numerology. For example, an RB is composed of a predetermined number of consecutive subcarriers in the frequency domain, and the number of subcarriers included in the RB may be the same regardless of numerology, for example, 12, but is not limited to this. A BWP may be composed of, for example, one or more consecutive RBs within a certain carrier bandwidth, but is not limited to this. One or more BWPs may be configured in one carrier for the UE 200, and at least one of the BWPs may be activated. Any frequency unit in the present disclosure may be interchangeable with another frequency unit.

[0182] Furthermore, resources in both the time domain and the frequency domain may be defined by one or more time / frequency units each consisting of a time unit and a frequency unit, such as, but not limited to, a resource element (RE) consisting of one symbol and one subcarrier, a resource element group (REG) consisting of a predetermined number of REs, or a control resource set (CORESET) consisting of a predetermined number of symbols and a predetermined number of RBs.

[0183] Furthermore, resources in the spatial domain may be defined, for example, by one or more spatial units, including, but not limited to, a beam, a layer of MIMO (Multi-Input Multi-Output), an antenna port, or a combination of at least two of these.

[0184] Furthermore, the resources in the code domain may be defined by one or more code units, such as, but not limited to, a cyclic shift (CS), an orthogonal cover code (OCC), or a combination thereof.

[0185] <Article> In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0186] <Means> The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc. [Industrial Applicability]

[0187] One aspect of the present disclosure is useful in wireless communication systems. [Explanation of symbols]

[0188] 10. Wireless communication systems 20 NG-RAN 100 base stations (gNB) 200 User Equipment (UE) 101,202 Transmitter 102,201 Receiver 103,203 Control unit

Claims

1. a communication unit that receives a downlink control signal and a channel state information reference signal; a control unit that performs measurement regarding channel state information by the channel state information reference signal, or suspends transmission and reception by the communication unit during a measurement period regarding radio resource control, and performs measurement regarding radio resource control; Equipped with the control unit determines whether a slot for receiving the channel state information reference signal is valid based on an instruction by the downlink control signal; If the slot is valid, perform measurements on the channel state information; If the slot is not valid, perform measurements related to radio resource control. Terminal.

2. the downstream control signal is composed of a 1-bit field, The control unit determines that the slot is valid if the field has a specific value. The terminal according to claim 1 .

3. The control unit determines that the slot is valid if the communication unit has the capability to transmit and receive during the measurement period. The terminal according to claim 1 .

4. the control unit determines that the slot is valid based on whether or not the instruction by the downlink control signal and the condition for temporarily suspending transmission and reception by the communication unit are within a predetermined range. The terminal according to claim 1 .

5. the communication unit receives a radio resource control signal; The control unit determines that the slot is valid based on the radio resource control signal. The terminal according to claim 1 .

6. The device is Receives downlink control signals and channel state information reference signals; Performing measurements related to channel state information using the channel state information reference signal, or suspending transmission and reception during a measurement period related to radio resource control, and performing measurements related to radio resource control; determining whether a slot for receiving the channel state information reference signal is valid based on an instruction from the downlink control signal; If the slot is valid, perform measurements on the channel state information; If the slot is not valid, perform measurements related to radio resource control. Communication method.

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