Terminal and communication method

Abstract

To allow a terminal to perform CSI (Channel State Information) measurement and reporting using on-demand SSB (SS / PBCH Block) transmitted from a base station that can transition to a power saving state.SOLUTION: A terminal includes a receiving unit that receives from a base station settings related to an on-demand SSB (SS / PBCH Block) and settings for measuring the on-demand SSB, a control unit that measures at least one of the on-demand SSB and an always-on SSB on the basis of the settings related to the on-demand SSB and the settings for measuring the on-demand SSB, and derives a CSI (Channel State Information) report, and a transmission unit that transmits the CSI report to the base station, and the control unit derives an SSBRI (SS / PBCH Block Resource indicator) corresponding to at least the on-demand SSB and includes it in the CSI report.SELECTED DRAWING: Figure 13

Description

[Technical Field]

[0001] The present invention relates to a terminal and a communication method in a wireless communication system. [Background technology]

[0002] For NR (New Radio) (also known as "5G"), the successor system to LTE (Long Term Evolution), technologies that satisfy 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).

[0003] Furthermore, in Release 18 of 3GPP (registered trademark), network energy savings has become increasingly important in order to achieve environmental sustainability, carbon neutrality, SDGs (Sustainable Development Goals), reduced operating costs, etc., and methods for saving energy are being considered (e.g., Non-Patent Document 2). [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V18.3.0 (2024-09) [Non-patent document 2] "New WID: Network energy savings for NR", RP-223540, 3GPP TSG RAN Meeting #98-e, December 2022 [Non-patent document 3] 3GPP TS 38.331 V18.3.0 (2024-09) [Non-patent document 4] 3GPP TS 38.211 V18.4.0 (2024-09) [Non-Patent Document 5] 3GPP TS 38.213 V18.4.0 (2024-09) [Non-patent document 6] 3GPP TS 38.321 V18.3.0 (2024-09) [Non-Patent Document 7] 3GPP TS 38.214 V18.4.0 (2024-09) [Non-patent document 8] 3GPP TS 38.212 V18.4.0 (2024-09) Summary of the Invention [Problem to be solved by the invention]

[0005] In order to achieve carbon neutrality and the SDGs, it is becoming increasingly important to reduce the power consumption of base stations, and the introduction of discontinuous transmission and reception at base stations is being considered.However, in cells that support the energy saving state (ES), the configuration related to the operation of performing CSI (Channel State Information) measurement and reporting using on-demand SSB (SS / PBCH Block) was not clear.

[0006] The present invention has been made in view of the above points, and has an object to enable a terminal to perform CSI (Channel State Information) measurement and reporting using on-demand SSBs (SS / PBCH Blocks) transmitted from a base station capable of transitioning to a power saving state. [Means for solving the problem]

[0007] According to the disclosed technology, there is provided a terminal including: a receiving unit that receives from a base station settings related to an on-demand SSB (SS / PBCH Block) and settings for measuring the on-demand SSB; a control unit that measures at least one of the on-demand SSB and an always-on SSB based on the settings related to the on-demand SSB and the settings for measuring the on-demand SSB, and derives a CSI (Channel State Information) report; and a transmitting unit that transmits the CSI report to the base station, wherein the control unit derives an SSBRI (SS / PBCH Block Resource indicator) corresponding to at least the on-demand SSB and includes it in the CSI report. [Effects of the Invention]

[0008] According to the disclosed technology, a terminal can perform CSI (Channel State Information) measurement and reporting using on-demand SSBs (SS / PBCH Blocks) transmitted from a base station that can transition to a power saving state. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 2] This is a diagram to explain CDRX in NR Release 15. [Figure 3] FIG. 1 is a diagram for explaining WUS in NR Release 16. [Figure 4] FIG. 2 is a diagram illustrating discontinuous reception at a base station according to a first embodiment of the present invention. [Figure 5] FIG. 2 is a diagram for explaining each parameter according to Example 1 of the embodiment of the present invention. [Figure 6] FIG. 10 is a diagram illustrating discontinuous transmission by a base station according to a fifth embodiment of the present invention. [Figure 7] FIG. 10 is a diagram for explaining each parameter according to Example 5 of the embodiment of the present invention. [Figure 8] FIG. 13 is a sequence diagram illustrating an example (1) of OSI transmission according to a ninth embodiment of the present invention. [Figure 9] FIG. 13 is a sequence diagram illustrating an example (2) of OSI transmission according to a ninth embodiment of the present invention. [Figure 10] FIG. 13 is a diagram illustrating an example of an on-demand SSB according to a ninth embodiment of the present invention. [Figure 11] FIG. 23 is a sequence diagram illustrating an example of the operation of on-demand SIB1 according to a tenth embodiment of the present invention. [Figure 12] FIG. 19 is a diagram illustrating an example of CSI configuration according to a tenth embodiment of the present invention. [Figure 13] 16 is a flowchart illustrating an example of a CSI report according to a tenth embodiment of the present invention. [Figure 14] FIG. 19 is a diagram illustrating an example of a CSI report according to a tenth embodiment of the present invention. [Figure 15] FIG. 2 is a diagram illustrating an example of a functional configuration of a base station according to an embodiment of the present invention. [Figure 16] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal according to an embodiment of the present invention. [Figure 17] FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station or a terminal according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0011] In operation of the wireless communication system according to the embodiment of the present invention, existing technologies may be used as appropriate. The existing technologies include, but are not limited to, existing NR or LTE. Furthermore, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and systems subsequent to LTE-Advanced (e.g., NR) unless otherwise specified.

[0012] Furthermore, in the embodiments of the present invention described below, terms used in existing LTE, such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), are used. This is for convenience of description, and similar signals, functions, etc. may be referred to by other names. Furthermore, the above-mentioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used in NR are not necessarily designated as "NR-".

[0013] Furthermore, in the embodiments of the present invention, the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0014] Furthermore, in the embodiments of the present invention, "configuring" radio parameters and the like may mean that predetermined values ​​are pre-configured, or that radio parameters notified from a base station or a terminal are set.

[0015] (System Configuration) Fig. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention. As shown in Fig. 1, the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20. Although Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.

[0016] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Furthermore, a TTI (Transmission Time Interval) in the time domain may be a slot, or a TTI may be a subframe.

[0017] The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, via the NR-PBCH and is also referred to as broadcast information. The synchronization signal and system information may be referred to as an SSB (SS / PBCH block). As shown in FIG. 1 , the base station 10 transmits control signals or data to the terminal 20 via DL (Downlink) and receives control signals or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. Furthermore, both the base station 10 and the terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to DL or UL. Furthermore, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell) and a primary cell (PCell) using Carrier Aggregation (CA). Furthermore, the terminal 20 may perform communication via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).

[0018] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or an M2M (Machine-to-Machine) communication module. As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10 and measures the propagation path quality based on the reception results of the reference signals. The terminal 20 may also be referred to as a UE, and the base station 10 may also be referred to as a gNB.

[0019] Next, we will discuss the status of discussions on base station power saving in NR Release 18. Base station and terminal methods for improving network energy savings from both the base station transmission and reception perspectives are being considered. For example, methods are being considered for base stations to more efficiently achieve dynamic and / or semi-static finer-granularity adaptation of transmission and / or reception using network energy saving techniques in one or more of the time, frequency, space, and power domains using potential support / feedback from terminals and potential assistance information.

[0020] Next, discontinuous reception (DRX) or connected mode discontinuous reception (CDRX) in a conventional terminal will be described.

[0021] 2 is a diagram for explaining CDRX in NR Release 15. In CDRX operation in NR Release 15, a terminal monitors the PDCCH during a DRX-on period.

[0022] 3 is a diagram illustrating WUS in NR Release 16. In NR Release 16, a PDCCH-based wake-up signal (WUS) can instruct one or more terminals whether the terminals should monitor the PDCCH within the next DRX-on period.

[0023] DCI format 2_6, in which the CRC (Cyclic Redundancy Check) is scrambled by the PS-RNTI (Power Saving - Radio Network Temporary Identifier), is used as a PDCCH-based WUS and is also called DCP (DCI with CRC scrambled by PS-RNTI).

[0024] The WUS monitoring opportunity is set by an offset from the On Period based on the terminal capabilities. If the WUS indicates "inactive" (i.e., the terminal is not transmitting or receiving data), the terminal can skip monitoring during the On Period and immediately transition to sleep mode. In addition, a default terminal behavior can be configured for when the PDCCH-based WUS is not detected, for example due to a detection error.

[0025] DCI format 2_6 includes one bit of activation instruction information indicating "active" or "inactive."

[0026] (Previous problems) Next, we will explain the problems that have been encountered so far. In order to achieve carbon neutrality and the SDGs, it is becoming increasingly important to reduce the power consumption of base stations. However, there has been a problem in that there has been no standardization of methods for reducing the power consumption of base stations.

[0027] (Outline 1 of this embodiment) Therefore, in this embodiment, an example will be described in which the power consumption of a base station is reduced from the viewpoint of the time domain. As specific examples, examples 1 to 4 will be described below.

[0028] Example 1 In this embodiment, the operation of a base station when it receives signals intermittently and definitions of related concepts will be described.

[0029] 4 is a diagram for explaining the discontinuous reception of a base station according to Example 1 of an embodiment of the present invention. The period during which the base station 10 disables / enables the receiving unit is introduced as a discontinuous reception (gNB CDRX) function by the base station (hereinafter referred to as base station discontinuous reception).

[0030] The concept of discontinuous reception of the base station 10 is similar to that of the terminal 20. The reception units and / or parameters to be disabled may be for each port, panel, beam, or carrier (or cell).

[0031] 5 is a diagram for explaining each parameter according to Example 1 of the embodiment of the present invention. The base station CDRX may be defined by a plurality of parameters listed below. The unit of the parameters may be a symbol, a slot, a subframe, a millisecond, a second, or the like. The unit may be different or the same for each parameter. drx-onDurationTimer: Duration at the start of a DRX cycle drx-SlotOffset: Delay before starting drx-onDurationTimer drx-InactivityTimer: the period during which the terminal 20 performs uplink transmission after an uplink reception opportunity drx-LongCycleStartOffset: The long DRX cycle (i.e., drx-LongCycle) and drx-StartOffset that define when the long DRX cycle and short DRX cycle start. drx-ShortCycle: Short DRX cycle drx-ShortCycleTimer: the period during which the base station 10 follows the short DRX cycle drx-RetransmissionTimerUL: Maximum period until a grant for uplink retransmission is received drx-HARQ-RTT-TimerUL: Minimum period until an uplink retransmission grant is expected

[0032] When base station discontinuous reception is enabled, the base station 10 may receive an uplink channel transmitted from the terminal 20 when the drx-onDurationTimer, drx-InactivityTimer or drx-RetransmissionTimerUL is running.

[0033] If discontinuous base station reception is enabled, the terminal 20 may act in one of the following options.

[0034] <Option 1> The terminal 20 may perform an operation assuming discontinuous reception at the base station. Specifically, the terminal 20 identifies the status of discontinuous reception at the base station by RRC, MAC-CE, or DCI. In the case of DCI, it is assumed that the terminal 20 receives DCI indicating the status of discontinuous reception at the base station from the base station 10. Details of the instruction by DCI will be described later in a third embodiment.

[0035] When the base station discontinuous reception is enabled, the terminal 20 may transmit the uplink channel during the execution of the drx-onDurationTimer, the drx-InactivityTimer, or the drx-RetransmissionTimerUL.

[0036] <Option 2> The terminal 20 may ignore the DBR, specifically, the terminal 20 performs uplink transmissions as scheduled or configured by the base station 10, regardless of the status of the DBR.

[0037] When the base station 10 is enabled for discontinuous base station reception, the base station 10 may perform scheduling or settings that take discontinuous base station reception into consideration, or may perform scheduling or settings regardless of discontinuous base station reception. When scheduling or settings that take discontinuous base station reception into consideration are performed, the discontinuous base station reception function is realized even if the terminal 20 ignores discontinuous base station reception. Conversely, when scheduling or settings that take discontinuous base station reception into consideration are not performed, if the terminal 20 ignores discontinuous base station reception, unnecessary signal transmission occurs, resulting in wasted power consumption by the terminal 20.

[0038] On the other hand, if the base station discontinuous reception is disabled, the base station 10 may receive the uplink channel transmitted from the terminal 20 regardless of the base station discontinuous reception parameter. That is, the base station 10 may keep the receiving unit turned on and continuously receive the uplink channel from the terminal 20.

[0039] If discontinuous base station reception is disabled, the terminal 20 may act in one of the following options.

[0040] <Option 1> The terminal 20 may perform an operation assuming discontinuous reception at the base station. Specifically, the terminal 20 identifies the status of discontinuous reception at the base station by RRC, MAC-CE, or DCI. In the case of DCI, it is assumed that the terminal 20 receives DCI indicating the status of discontinuous reception at the base station from the base station 10. Details of the instruction by DCI will be described later in a third embodiment.

[0041] If discontinuous base station reception is disabled, the terminal 20 performs uplink transmissions as scheduled or configured by the base station 10, regardless of the status of discontinuous base station reception.

[0042] <Option 2> The terminal 20 may ignore the DBR, specifically, the terminal 20 performs uplink transmissions as scheduled or configured by the base station 10, regardless of the status of the DBR.

[0043] The base station 10 may also receive terminal assistance information in order to determine the values ​​of the aforementioned parameters that define the wake-up / sleep periods.

[0044] The terminal assistance information may be a period of terminal traffic. The base station 10 may receive the terminal assistance information at a higher layer. The base station 10 determines the value of the parameter by taking into account the terminal assistance information reported by the terminal 20.

[0045] The terminal 20 may transmit terminal assistance information, such as the period of terminal traffic, to the base station 10.

[0046] According to this embodiment, the base station 10 can achieve discontinuous reception.

[0047] Example 2 In this embodiment, an example of a method for triggering discontinuous reception from a base station will be described.

[0048] Enabling / disabling base station discontinuous reception may be done through one of the following options:

[0049] <Option 1> The base station 10 may enable / disable the base station discontinuous reception when an RRC parameter indicating the enable / disable of the base station discontinuous reception is set by the terminal 20 or another network node (e.g., a core network or another base station, etc.).

[0050] <Option 2> The base station 10 may enable / disable the base station discontinuous reception when it receives a MAC-CE command indicating the enable / disablement of the base station discontinuous reception from the terminal 20 or another network node (e.g., a core network or another base station, etc.).

[0051] <Option 3> When receiving UCI included in the PUCCH or PUSCH from the terminal 20, the base station 10 may enable / disable the discontinuous reception at the base station based on the instruction to enable / disable the discontinuous reception at the base station included in the UCI.

[0052] The UCI including the instruction to enable / disable the base station discontinuous reception may be a UCI of a newly defined UCI type different from the conventional UCI, or the UCI may be a UCI of the same conventional type as the conventional UCI, such as HARQ-ACK, CSI, or SR.

[0053] The terminal 20 may transmit a PUCCH or PUSCH to the base station 10 to carry out an instruction (ie, activation / deactivation) of the discontinuous reception at the base station, thereby enabling / disabling the discontinuous reception at the base station.

[0054] The terminal 20 may receive DCI indicating the status of the discontinuous reception at the base station from the base station 10, in order to determine whether the instruction by the UCI has been successfully decoded by the base station 10 and whether there is a common understanding of the status of the discontinuous reception at the base station between the base station 10 and the terminal 20. Details of the DCI will be described later in a third embodiment.

[0055] <Option 4> The base station 10 may enable / disable the base station discontinuous reception when certain conditions are met. For example, the base station 10 may enable the base station discontinuous reception when the base station 10 does not receive an uplink channel from the terminal 20 for a certain period of time. The certain period of time may be a symbol, a slot, a subframe, a millisecond, a second, or the like.

[0056] The terminal 20 may receive DCI indicating the status of discontinuous reception at the base station from the base station 10, in order to obtain a common understanding of the status of discontinuous reception at the base station between the base station 10 and the terminal 20. Details of the DCI will be described later in a third embodiment.

[0057] <Option 5> The base station 10 may enable / disable the base station discontinuous reception by a combination of the above options.

[0058] Furthermore, the base station 10 may perform one of the following optional operations as a procedure for enabling / disabling the base station discontinuous reception.

[0059] <Option 1> The base station 10 may immediately enable / disable the discontinuous reception at the base station when any of the above-mentioned options that trigger the enablement / disablement of the discontinuous reception at the base station is executed.

[0060] <Option 2> The base station 10 may receive an instruction on the timing of enabling / disabling the base station discontinuous reception at a fixed time interval after receiving the instruction, or at a specified time. The time interval or time may be specified in units of symbols, slots, subframes, milliseconds, seconds, etc. In other words, the base station 10 may enable / disable the base station discontinuous reception at a specified time when one of the above-mentioned options that trigger the enabling / disabling of the base station discontinuous reception is executed.

[0061] <Option 3> The base station 10 may enable / disable the base station discontinuous reception based on a newly introduced timer. The enable / disable timers may be the same or different. The timer unit may be symbols, slots, subframes, milliseconds, seconds, etc. The base station 10, the terminal 20, or another network node may set the timer in RRC or specify it in MAC-CE or UCI / DCI.

[0062] That is, when any of the options that trigger the enabling / disabling of the base station discontinuous reception described above is executed, the timer is executed, and when the timer expires, the base station 10 may enable / disable the base station discontinuous reception.

[0063] The advantages of the timer are as follows: Even if an instruction to enable discontinuous reception at the base station is given, there may be cases where actual uplink transmission from the terminal 20 occurs with a certain delay after the instruction, due to processing by the terminal 20, etc. Even in such cases, by introducing a timer, discontinuous reception at the base station can be enabled after a certain time, thereby reducing the power consumption of the base station 10.

[0064] Furthermore, even if an instruction to disable discontinuous reception at the base station is given, there may be cases where actual uplink transmission from the terminal 20 continues to occur for a while after the instruction due to processing by the terminal 20. Even in such cases, by introducing a timer, the discontinuous reception at the base station can be disabled after a certain period of time, thereby improving the performance of the terminal 20.

[0065] According to this embodiment, it is possible to realize a trigger for base station discontinuous reception, and also to realize an operation for enabling / disabling the reception when the trigger is established.

[0066] Example 3 In this embodiment, an example will be described in which a terminal receives an instruction regarding discontinuous reception at a base station via DCI.

[0067] If the terminal 20 identifies the status of discontinuous reception at the base station and the terminal 20 and the base station 10 have a common understanding of the status, it is necessary to consider a mechanism for the base station 10 to indicate the status of discontinuous reception at the base station to the terminal 20. For timely indication, an indication by DCI is promising.

[0068] It should be noted that the advantage of having a common understanding is that when base station discontinuous reception is enabled, the terminal 20 can stop uplink transmission, thereby saving power consumption of the terminal 20.

[0069] A new RNTI may be introduced to indicate the status of the base station discontinuous reception. The new RNTI may be, for example, the gNB CDRX-RNTI (GC-RNTI).

[0070] Also, the introduction of the DCI field may be one of the following options:

[0071] <Option 1> A new DCI field may be introduced to indicate the status of the base station discontinuous reception. The bit size of the introduced DCI field may be 1 bit, with a "1" indicating a valid state and a "0" indicating an invalid state. The reverse may also be possible.

[0072] <Option 2> A new DCI field does not need to be introduced. That is, the status of the base station discontinuous reception may be indicated by an existing field. For example, if the corresponding DCI format is scrambled with a new RNTI such as GC-RNTI and the HPN and RV fields are all set to "0", the terminal 20 may identify that the status of the base station discontinuous reception is enabled.

[0073] Also, for example, if the corresponding DCI format is scrambled with a new RNTI such as GC-RNTI, the HPN and RV fields are set to all "0", and the MCS field is set to all "1", the terminal 20 may identify that the base station discontinuous reception status is disabled.

[0074] Also, the corresponding DCI format may be one of the following options:

[0075] <Option 1> It may be a DCI specific to the terminal 20.

[0076] <Option 1-1> The base station 10 may indicate the status of the base station discontinuous reception using a new DCI format that is different from the conventional format.

[0077] <Option 1-2> The base station 10 may indicate the status of base station discontinuous reception using conventional DCI formats 0_1, 0_2, 1_1, 1_2 or other DCI formats.

[0078] <Option 2> The DCI may be common to a group of terminals 20.

[0079] <Option 2-1> The base station 10 may indicate the status of the base station discontinuous reception using a new DCI format different from the conventional one. The above-mentioned new DCI field may be introduced in the new DCI format together with other new DCI fields for the power saving technique of the base station 10. The base station 10 may scramble the new DCI format with the above-mentioned new RNTI (e.g., GC-RNTI).

[0080] <Option 2-2> The base station 10 may indicate the status of the base station discontinuous reception using the conventional DCI format 2_6 or another group-wide DCI format.

[0081] Assuming that DCI format 2_6 is used, the conventional DCI fields of the DCI format may be reinterpreted to indicate the status of the base station discontinuous reception. For example, the "wake-up indication" may be reinterpreted. A valid state may be indicated by "1" and a invalid state by "0", or vice versa.

[0082] For differentiation, the base station 10 may scramble the DCI format 2_6 with the new RNTI (such as the GC-RNTI) described above instead of the PS-RNTI.

[0083] According to this embodiment, the terminal 20 can identify the status of the base station discontinuous reception, and the terminal 20 and the base station 10 can understand it in common.

[0084] Example 4 In this embodiment, an example will be described in which base stations and terminals mutually report capability information relating to base station discontinuous reception.

[0085] The following capability information may be introduced:

[0086] Base station capability information indicating the capabilities of the base station 10 may be introduced. That is, the base station 10 transmits the base station capability information to the terminal 20 or other network nodes. The terminal 20 or other network nodes that receive the base station capability information may assume the capabilities of the base station 10 based on the received base station capability information.

[0087] The base station capability information may include information indicating whether the base station supports discontinuous reception. Also, the base station capability information may be introduced to indicate whether a DCI indication indicating the status of discontinuous reception is supported.

[0088] The following terminal capability information may also be introduced. For example, terminal capability information indicating whether or not the base station discontinuous reception is supported may be introduced. Furthermore, terminal capability information indicating whether or not the base station discontinuous reception status identification may be introduced.

[0089] If the terminal 20 has a terminal capability that supports identifying the status of the base station discontinuous reception, the terminal 20 may identify whether the base station discontinuous reception function is enabled or disabled. For example, the terminal 20 may perform the operation of option 1 described in the first embodiment. Furthermore, if the terminal 20 does not have a terminal capability that supports identifying the status of the base station discontinuous reception, the terminal 20 may perform the operation of option 2 described in the first embodiment.

[0090] Also, terminal capability information indicating whether or not a DCI indication indicating the status of discontinuous reception at a base station is supported may be introduced. Also, terminal capability information indicating whether or not a new terminal-specific / group-common DCI format is supported may be introduced.

[0091] The dependency between the base station capability information and the terminal capability information may be one of the following options:

[0092] <Option 1> To apply the base station discontinuous reception, both the base station capability information and the terminal capability information indicating that the base station discontinuous reception is supported may need to be reported.

[0093] <Option 2> To apply the base station discontinuous reception, it may be sufficient to report only either the base station capability information or the terminal capability information indicating that the base station discontinuous reception is supported.

[0094] According to this embodiment, the base station and the terminal can mutually report capability information regarding the base station discontinuous reception.

[0095] The terminal capabilities in the above-described embodiments may be limited to cases where the terminal 20 is a reduced-function terminal, or may be applied even when the terminal 20 is not a reduced-function terminal.

[0096] (Outline 2 of this embodiment) Also, cell DTX / DRX is being considered to reduce power consumption in the base station 10. For example, alignment of cell DTX / DRX with UE-DRX in RRC connected mode, information exchange between nodes regarding cell DTX / DRX, etc. are being considered. Note that cell DTX / DRX may be replaced with cell DTX and cell DRX, or may be replaced with cell DTX or cell DRX.

[0097] The mechanism for enabling or disabling the transceiver units of the base station 10 is important to reduce the power consumption of the base station 10. To reduce the power consumption of the base station 10, the adaptation of DL transmission and UL reception has been considered.

[0098] Cell DTX / DRX is useful for achieving adaptation of DL transmission and UL reception. However, the details of the operation of cell DTX / DRX have not been clear. Therefore, hereinafter, examples 5 to 8 will be described as specific examples related to cell DTX / DRX.

[0099] Example 5 In Example 5, a definition of cell DTX / DRX will be described. Cell DRX may be defined as in Examples 1 to 4 above. Whether cell DRX is performed is determined by higher layer parameters, and a period, a start slot, an offset, and a duration may be set. Furthermore, whether cell DRX is applicable may be determined by a semi-static, dynamic, or flexible network state.

[0100] Cell DTX may be defined as described below. Whether cell DTX is performed is determined by higher layer parameters, and the period, start slot, offset, and duration may be configured. Furthermore, whether cell DTX is applicable may be determined by semi-static, dynamic, or flexible network conditions.

[0101] <Option 1> 6 is a diagram for explaining the discontinuous transmission of a base station according to a fifth embodiment of the present invention. As shown in FIG. 6, a period during which the base station 10 disables or enables its own transmission unit may be introduced as cell DTX.

[0102] The transmission units and / or parameters to be disabled may be per port, per panel, per beam, per carrier, or per cell. Cell DTX may be defined by some or all of the parameters listed in 1)-6) below. The units of the parameters may be symbols, slots, subframes, milliseconds, seconds, etc., or other units. The units of the parameters may be the same or different.

[0103] 1) dtx-onDurationTimer: Duration from the beginning of the DTX cycle. 2) dtx-SlotOffset: The delay period before starting the dtx-onDurationTimer. 3) dtx-InactivityTimer: A period that starts after a DL transmission opportunity (an opportunity for the base station 10 to perform DL transmission and for the terminal 20 to receive DL transmission). 4) dtx-LongCycleStartOffset: The long DTX cycle (i.e., dtx-LongCycle) and dtx-StartOffset that defines the start of the long and short DTX cycles. 5) dtx-ShortCycle: Short DTX cycle. May be optional. 6) dtx-ShortCycleTimer: A period during which the base station 10 performs a short DTX cycle. When DL reception occurs during long DTX, short DTX is started. This may be optional.

[0104] FIG. 7 is a diagram for explaining each parameter according to Example 5 of the embodiment of the present invention. As shown in FIG. 7, the active time is dtx-onDurationTimer after dtx-SlotOffset from the beginning of dtx-LongCycle. If DL reception occurs during drx-LongCycle, the active time ends after dtx-InactivityTimer from the point at which DL reception occurred, and dtx-ShortCycle starts. If DL reception occurs during dtx-ShortCycleTimer, dtx-ShortCycle continues. If DL reception does not occur during dtx-ShortCycleTimer, dtx-LongCycle starts.

[0105] When cell DTX is enabled, the base station 10 may transmit a DL channel or a DL signal while the dtx-onDurationTimer or the dtx-InactivityTimer is running. As an operation of the terminal 20, when cell DTX is enabled, the terminal 20 may receive a DL channel or a DL signal while the dtx-onDurationTimer or the dtx-InactivityTimer is running. The terminal 20 may assume that it receives a DL channel or a DL signal when the dtx-onDurationTimer or the dtx-InactivityTimer is not running.

[0106] When cell DTX is disabled, the terminal 20 may expect to receive DL channels or DL ​​signals as signaled or configured by the base station 10 .

[0107] The DL channel or DL ​​signal may be any of PDCCH, PDSCH, SPS (Semi Persistent Scheduling)-PDSCH, CSI-RS (Channel State Information - Reference Signal), PT-RS (Phase Tracking - Reference Signal), and DM-RS (Demodulation - Reference Signal).

[0108] The UL channel or signal may be any of the PRACH, PUCCH, PUSCH, CG-PUSCH, SRS, PT-RS, and DM-RS.

[0109] Example 6 In the sixth embodiment, the setting of cell DTX / DRX will be described.

[0110] <Option 1> Joint configuration may be performed. Cell DTX and cell DRX may be jointly configured by a common parameter. When the common parameter (e.g., CellDTXDRX-Config) is configured, cell DTX and DRX may be enabled. The terminal 20 may appropriately perform the operation of the fifth embodiment.

[0111] The common parameters may include either or both of the information elements 1) and 2) shown below.

[0112] 1) Parameters common to DTX and DRX. Some parameters may be common to DTX and DRX. For example, a parameter indicating an on-duration timer may be common to DTX and DRX. For example, a parameter indicating a cycle may be common to DTX and DRX.

[0113] 2) Parameters separated for DTX and DRX: Some parameters may be set separately for DTX and DRX. For example, a parameter indicating a slot offset may be set separately for DTX and DRX.

[0114] Option 1 allows for a reduction in RRC signaling overhead.

[0115] <Option 2> Separate configurations may be performed. Cell DTX and cell DRX may be configured individually by separate parameters. When a parameter for DTX (e.g., CellDTX-Config) is configured, cell DTX may be enabled. When a parameter for DRX (e.g., CellDRX-Config) is configured, cell DRX may be enabled. The parameters for DTX may include the parameters described in the fifth embodiment. The parameters for DRX may include the parameters described in the first embodiment.

[0116] Option 2 provides more flexibility in configuration when enabling either Cell DTX or Cell DRX.

[0117] Example 7 In Example 7, the enabling or disabling of cell DTX / DRX is described. When cell DTX and cell DRX are jointly configured (option 1 in Example 6), cell DTX and cell DRX may be enabled or disabled as follows:

[0118] <Option 1> The cell DTX and cell DRX may be enabled or disabled by RRC signaling. When an RRC parameter is configured, the cell DTX and cell DRX may be enabled or disabled. For example, the RRC parameter may be the common parameter (e.g., CellDTXDRX-Config) in the sixth embodiment.

[0119] <Option 2> Cell DTX and cell DRX may be enabled or disabled by MAC-CE. When the terminal 20 receives MAC-CE, cell DTX and cell DRX may be enabled or disabled.

[0120] <Option 3> The cell DTX and cell DRX may be enabled or disabled by the DCI. The terminal 20 may be dynamically notified by the DCI that the cell DTX and cell DRX have been enabled or disabled. The notification by the DCI may be performed as shown in 1)-4) below.

[0121] 1) The DCI format may be a UE-specific DCI format or a group-common DCI format.

[0122] 2) The DCI format may be an existing format (for example, DCI formats 1_1, 1_2, 2_0) or may be a newly defined format (for example, 1_x, 2_x).

[0123] 3) The RNTI may be an existing RNTI (for example, C-RNTI, SFI-RNTI), or a new RNTI may be defined.

[0124] 4) The DCI fields may be a set of existing fields and / or new fields. For example, if it is a set of existing fields, some fields may be used to enable or disable cell DTX and cell DRX, as shown in Alt. 1) and Alt. 2) below.

[0125] Alt. 1) When scrambling is performed by an existing RNTI such as CS-RNTI, and, for example, when HPN is set to all "0", RV is set to all "00", and TDRA is set to all "1", the terminal 20 may dynamically enable cell DTX and cell DRX. Also, when HPN is set to all "0", RV is set to all "00", MCS is set to all "1", FDRA is set to all "1", and TDRA is set to all "1", the terminal 20 may dynamically disable cell DTX and cell DRX.

[0126] Alt. 2) When scrambling is performed with a new RNTI and, for example, when HPN is set to all "0"s and RV is set to all "00", the terminal 20 may dynamically enable cell DTX and cell DRX. Also, when, for example, HPN is set to all "0", RV is set to all "00", MCS is set to all "1", and FDRA is set to all "1", the terminal 20 may dynamically disable cell DTX and cell DRX.

[0127] For example, in the case of a new DCI field, cell DTX and cell DRX may be enabled or disabled by the new DCI field. The new DCI field may be referred to as a "cell DTX DRX identifier." For example, if the cell DTX DRX identifier is set to "1," the terminal 20 may dynamically enable cell DTX and cell DRX. Also, for example, if the cell DTX DRX identifier is set to "0," the terminal 20 may dynamically disable cell DTX and cell DRX. Note that the DCI including the new DCI field may be scrambled with either an existing RNTI or a new RNTI.

[0128] Also, when cell DTX and cell DRX are configured separately (option 2 in Example 6), cell DTX and cell DRX may be enabled or disabled as follows.

[0129] <Option 1> The cell DTX or cell DRX may be enabled or disabled by RRC signaling. When an RRC parameter is configured, the cell DTX or cell DRX may be enabled or disabled. For example, the RRC parameter may be the separate parameter (e.g., CellDTX-Config, CellDRX-Config) in the sixth embodiment.

[0130] <Option 2> Cell DTX or cell DRX may be enabled or disabled by MAC-CE. When the terminal 20 receives MAC-CE, cell DTX or cell DRX may be enabled or disabled.

[0131] <Option 3> The terminal 20 may be dynamically notified by DCI that cell DTX or cell DRX has been enabled or disabled. The notification by DCI may be performed as shown in 1)-4) below.

[0132] 1) The DCI format may be a UE-specific DCI format or a group-common DCI format.

[0133] 2) The DCI format may be an existing format (for example, DCI formats 1_1, 1_2, 2_0) or may be a newly defined format (for example, 1_x, 2_x).

[0134] 3) The RNTI may be an existing RNTI (for example, C-RNTI, SFI-RNTI), or a new RNTI may be defined.

[0135] 4) The DCI fields may be a set of existing fields and / or new fields. For example, a different set of DCI fields may be used to enable or disable cell DTX or cell DRX, respectively, to indicate either cell DTX or cell DRX. For example, in the case of an existing set of fields, some fields may be used to enable or disable cell DTX and cell DRX, as shown in Alt. 1) and Alt. 2) below.

[0136] Alt. 1) When scrambling is performed by an existing RNTI such as CS-RNTI, and, for example, when HPN is set to all "0", RV is set to all "00", and PRI is set to all "1", the terminal 20 may dynamically enable cell DTX. Also, for example, when HPN is set to all "0", RV is set to all "00", MCS is set to all "1", FDRA is set to all "1", and PRI is set to all "1", the terminal 20 may dynamically disable cell DTX. Also, for example, when HPN is set to all "0", RV is set to all "00", and TDRA is set to all "1", the terminal 20 may dynamically enable cell DRX. Also, for example, when HPN is set to all "0", RV is set to all "00", MCS is set to all "1", FDRA is set to all "1", and TDRA is set to all "1", the terminal 20 may dynamically disable cell DRX.

[0137] Note that the PRI and TDRA fields may additionally be used to indicate whether the DCI to be enabled or disabled is for CG-PUSCH / SPS-PDSCH or cell DTX / cell DRX.

[0138] Note that the same field (e.g., TDRA) as the fields used as described above, such as PRI and TDRA, may be used to indicate whether the target is CG-PUSCH / SPS-PDSCH or cell DTX / cell DRX. When different DCI formats are used, the DCI format may indicate whether the target is cell DTX or cell DRX. For example, DCI format 0_0 may enable or disable cell DRX, and DCI format 1_0 may enable or disable cell DTX.

[0139] Alt. 2) When scrambling is performed with a new RNTI, for example, if HPN is set to all "0", RV is set to all "00", and PRI is set to all "1", the terminal 20 may dynamically enable cell DTX. For example, if HPN is set to all "0", RV is set to all "00", MCS is set to all "1", FDRA is set to all "1", and PRI is set to all "1", the terminal 20 may dynamically disable cell DTX. For example, if HPN is set to all "0" and RV is set to all "00", the terminal 20 may dynamically enable cell DRX. For example, if HPN is set to all "0", RV is set to all "00", MCS is set to all "1", and FDRA is set to all "1", the terminal 20 may dynamically disable cell DRX.

[0140] Note that, for example, PRI is used as described above, but an additional field may not be used to indicate whether cell DTX or cell DRX is intended. When different DCI formats are used, the DCI format may indicate whether cell DTX or cell DRX is intended. For example, DCI format 0_0 may enable or disable cell DRX, and DCI format 1_0 may enable or disable cell DTX.

[0141] For example, in the case of a new DCI field, the new DCI field may enable or disable cell DTX or cell DRX, and the new DCI field may be called a "cell DTX identifier" or a "cell DRX identifier."

[0142] When cell DTX and cell DRX are notified separately in separate fields, for example, if the cell DTX identifier is set to "1", the terminal 20 may dynamically enable cell DTX. Also, for example, if the cell DTX identifier is set to "0", the terminal 20 may dynamically disable cell DTX. For example, if the cell DRX identifier is set to "1", the terminal 20 may dynamically enable cell DRX. Also, for example, if the cell DRX identifier is set to "0", the terminal 20 may dynamically disable cell DRX.

[0143] Furthermore, this new DCI field may be referred to as a "cell DTX DRX identifier." When cell DTX and cell DRX are jointly notified in a common field, for example, if the cell DTX DRX identifier is set to "01," the terminal 20 may dynamically enable cell DTX or dynamically disable cell DRX. For example, if the cell DTX DRX identifier is set to "10," the terminal 20 may dynamically enable cell DRX or dynamically disable cell DTX. For example, if the cell DTX DRX identifier is set to "11," the terminal 20 may dynamically enable cell DTX and cell DRX. For example, if the cell DTX DRX identifier is set to "00," the terminal 20 may dynamically enable cell DTX and cell DRX. The bit mapping of cell DTX and cell DRX described above may be reversed.

[0144] It should be noted that the DCI including the new DCI field may be scrambled with either the existing RNTI or the new RNTI.

[0145] The timing for applying the above-mentioned enabling or disabling of cell DTX or cell DRX notified by MAC-CE or DCI may be 1) or 2) shown below.

[0146] 1) The terminal 20 may immediately activate or deactivate the cell DTX or cell DRX. When activation or deactivation of the cell DTX or cell DRX is notified by the MAC-CE or DCI, the terminal 20 may immediately activate or deactivate the cell DTX or cell DRX.

[0147] 2) The terminal 20 may activate or deactivate the cell DTX or cell DRX at the notified time. The time to activate or deactivate the cell DTX or cell DRX may be notified via RRC signaling, MAC-CE, or DCI as an interval or a certain time from the time when the activation or deactivation is notified. The unit of time may be a symbol, slot, subframe, millisecond, second, or the like. When the activation or deactivation of cell DTX or cell DRX is notified by MAC-CE or DCI, the cell DTX or cell DRX may be activated or deactivated at the notified time in advance.

[0148] Example 8 In Example 8, the related operation of cell DTX / DRX and UE DRX will be described. If the time positions of cell DTX and UE DRX are not aligned, the terminal 20 may wake up to receive a DL channel or DL ​​signal when no DL transmission is being performed due to cell DTX.

[0149] Therefore, you may operate as shown in Option 1-Option 5 below.

[0150] <Option 1> If UE DRX is configured (for example, DRX-Config), the terminal 20 may not assume that cell DTX is configured.

[0151] <Option 2> When cell DTX is configured, terminal 20 does not need to assume that UE DRX (for example, DRX-Config) is configured. Note that the parameters of cell DTX may be the parameters described in the sixth embodiment.

[0152] <Option 3> When UE DRX is configured (e.g., DRX-Config), the terminal 20 does not need to assume that cell DTX that is not time-aligned with UE DRX is configured. If cell DTX and UE DRX are time-aligned, cell DTX and UE DRX may be configured jointly.

[0153] <Option 4> When cell DTX is configured, terminal 20 does not need to assume that UE DRX (e.g., DRX-Config) that is not time-aligned with cell DTX is configured. When cell DTX and UE DRX are time-aligned, cell DTX and UE DRX may be configured jointly.

[0154] <Option 5> Regardless of whether the time positions of cell DTX and UE DRX are aligned or not, cell DTX and UE DRX may be configured in the terminal 20. Furthermore, when cell DTX is configured in addition to UE DRX, the parameters of cell DTX may take priority. The terminal 20 may ignore the parameters of UE DRX. The terminal 20 may operate as in the fifth embodiment. Furthermore, when cell DTX is configured in addition to UE DRX, the parameters of both may be applied. The terminal 20 may wake up during the active times of both cell DTX and cell DRX.

[0155] The above "cell DTX and UE DRX are time aligned" may be defined as option 1 or option 2 shown below.

[0156] <Option 1> If the long cycle is the same for cell DTX and UE DRX, it may be defined that the time positions of cell DTX and UE DRX are aligned.

[0157] <Option 1-1> Furthermore, when the long cycle is the same for cell DTX and UE DRX, it may be defined that the time positions of cell DTX and UE DRX are aligned regardless of the active time within the long cycle. In other words, when the long cycle of cell DTX (e.g., dtx-LongCycle) and the long cycle of UE DRX (e.g., drx-LongCycle) are the same, it may be defined that the time positions are aligned.

[0158] <Option 1-2> If the long cycle is the same for cell DTX and UE DRX, it may be further defined that the cell DTX and UE DRX are time-aligned depending on the active time within the long cycle. If the on-duration timers and slot offsets in the long cycle (e.g., dtx-LongCycle, drx-LongCycle, dtx-onDurationTimer, drx-onDurationTimer, dtx-SlotOffset, drx-SlotOffset) are the same for cell DTX and UE DRX, it may be defined that the cell DTX and UE DRX are time-aligned. Furthermore, other parameters (e.g., dtx-InactivityTimer, drx-InactivityTimer, etc.) may be additionally considered to determine whether this definition is met.

[0159] <Option 2> In addition to the long cycle, if the short cycle is the same for cell DTX and UE DRX, it may be defined that the cell DTX and UE DRX are time-aligned. Option 2 may be applied when the conditions of Option 1-1 or Option 1-2 are met.

[0160] <Option 2-1> Furthermore, if the short cycle is the same for cell DTX and UE DRX, it may be defined that the time positions of cell DTX and UE DRX are aligned regardless of the active time within the short cycle. In other words, if the short cycle of cell DTX (e.g., dtx-ShortCycle) and the short cycle of UE DRX (e.g., drx-ShortCycle) are the same, it may be defined that the time positions are aligned.

[0161] <Option 2-2> If the short cycle is the same for cell DTX and UE DRX, then it may be further defined that the time positions of cell DTX and UE DRX are aligned depending on the active time within the short cycle. If the short cycle timers and short cycles (e.g., dtx-ShortCycleTimer, drx-ShortCycleTimer, dtx-ShortCycle, drx-ShortCycle) are the same for cell DTX and UE DRX, then it may be defined that the time positions of cell DTX and UE DRX are aligned.

[0162] (Outline 3 of this embodiment) Example 9 Here, the following technologies are being considered for network energy saving (NES).

[0163] On-demand SSB and / or SIB1 transmission is being considered. For example, on-demand S1B1 or SSB transmission to idle UEs, and on-demand SSB and other DL signals transmission to connected UEs in SCells are being considered. Note that SSB may be replaced with SS / PBCH block. Note that " / " may be replaced with either "and / or", "and", or "or".

[0164] To trigger on-demand SSB and / or SIB1 transmission, the following methods 1)-3) are being considered.

[0165] 1) Triggering based on the UE's UL-WUS (Wake-up signal), which may be used for non-CA cases, for example, and may be an existing signal or a new signal. 2) Trigger based on a backhaul signal indicating cell ON or OFF. 3) Trigger based on SCell activation or deactivation signaling.

[0166] Also, SSB and / or SIB1-less operation may be performed in multi-carrier scenarios, for example, no SSB and / or SIB1 in non-anchor NES cells for idle or inactive UEs, assuming that other carriers (e.g., anchor cells) are available to the UE.

[0167] The decision to use on-demand SSB and / or SIB1 transmission versus no SSB and / or SIB1 may be based on the benefits in the target scenario, and optimization of the transmission of common signals and / or channels is considered.

[0168] 8 is a sequence diagram illustrating an example (1) of OSI (On-demand system information) transmission according to a ninth embodiment of the present invention. FIG. 8 illustrates an example of an SIB request based on MSG1 (message 1 in a random access procedure), and CFRA (Contention Free Random Access) may be assumed. In step S101, the terminal 20 transmits a system information request indicating a specific SIB type to the base station 10 by using a pre-allocated PRACH resource and a preamble for MSG1. In step S102, the base station 10 transmits MSG2 to the terminal 20 as a response. In step S103, the base station 10 transmits the requested system information to the terminal 20.

[0169] 9 is a sequence diagram for explaining an example (2) of OSI transmission according to Example 9 of the embodiment of the present invention. FIG. 9 shows an example of an SIB request based on MSG3 (message 3 in the random access procedure), and CBRA (Contention-based Random Access) may be assumed. In step S201, the terminal 20 transmits MSG1 to the base station 10. In step S202, the base station 10 transmits MSG2 to the terminal 20. In step S203, the terminal 20 transmits MSG3 to the base station 10, the MSG3 including information indicating a system information request. In step S204, the base station 10 transmits MSG4 to the terminal 20. In step S205, the base station 10 transmits the requested system information to the terminal 20.

[0170] 10 is a diagram illustrating an example of an on-demand SSB according to a ninth embodiment of the present invention. The on-demand SSB can be notified or transmitted in various procedures during carrier aggregation. It is assumed that basic information of the on-demand SSB is set by RRC signaling, and then an activation command is notified by MAC-CE or the like immediately before the on-demand SSB is actually transmitted.

[0171] In addition, notification may be performed that the characteristics or period of an existing SSB or an always-on SSB in the SCell are changed or adapted.

[0172] As shown in Fig. 10, for operations related to on-demand SSB, Scenario #2 considers the operation when the SCell is set to a deactivated state. Scenario #2A considers the operation when an SCell activation command is received. Scenario #3A considers the operation from receiving the SCell activation command until SCell activation is completed. Scenario #3B considers the operation when SCell activation is completed or after SCell activation is completed.

[0173] Example 10 In the existing specifications, a specification extension is being considered that will enable on-demand transmission of SIB1 (System Information Block 1), which is transmitted periodically and always on, triggered by the UE. A cell that operates on-demand SIB1 transmission is called an NES cell. The UE acquires in advance the configuration related to UL transmission (UL-WUS configuration) that triggers on-demand SIB1. The UE notifies the UL-WUS configuration mainly in cell A, which transmits SIB1 periodically or always on. After camping on the NES cell, the WUS configuration can also be notified from the NES cell.

[0174] 11 is a sequence diagram illustrating an example of an operation related to an on-demand SIB1 according to a tenth embodiment of the present invention. In step S301, the UE completes cell selection or cell reselection and camps on cell A. In step S302, the UE receives a WUS configuration from cell A via SIB-X or dedicated RRC signaling.

[0175] In step S303, the UE triggers, for example, cell reselection. In step S304, a condition for requesting an on-demand SIB is met in the NES cell. In step S305, the UE transmits a UL-WUS (PRACH / msg1) requesting on-demand SIB1 to the NES cell. In step S306, the NES cell transmits a UL-WUS response (RAR / msg2) to the UE via the PDCCH and PDSCH.

[0176] In step S307, the NES cell transmits the on-demand SIB1 to the UE via the PDCCH and PDSCH. In step S308, the UE performs, for example, cell reselection. In step S309, the UE camps on the NES cell.

[0177] Regarding NES, the following studies 1)-4) are being conducted.

[0178] 1) For both intra or inter CA, procedures and signaling methods may be specified to support on-demand SSB SCell operation for UEs with a connection mode configured using CA. A trigger method may be specified, for example, by selecting from existing signals, UE uplink wake-up signals using channels, cell on / off indication via backhaul, and SCell activation / deactivation signaling.

[0179] It should be noted that on-demand SSB transmission can be used by the UE for at least SCell time / frequency synchronization, L1 / L3 measurements, and SCell activation, and may be supported for FR1 and FR2 in non-shared spectrum.

[0180] 2) On-demand SIB1 for UEs in idle / inactive mode may be supported. · Procedures and signaling methods for case 2 may be specified. -Case 2: The UE gets UL-WUS configuration from cell A, the UE transmits UL-WUS on the NES cell, and the UE receives on-demand SIB1 from NES cell B. -Triggering method by UL-WUS using PRACH may be supported. · Signaling between NG-RAN nodes may be specified at least for the configuration of UL-WUS. For this purpose, the SSB does not need to be changed. The definitions of the terms are as follows: -UL-WUS: Uplink wake-up signal Cell A: A cell that periodically transmits at least its own SIB1 -NES cell: A cell capable of transmitting SIB1 in response to a UL-WUS from a UE. Note that the impact on legacy UEs may be minimized, and the impact of the specifications for supporting the feature may be minimized.

[0181] 3) It may support adaptation of common signals and / or channel transmissions. · SSB adaptation in the time domain, e.g., periodicity adaptation. PRACH adaptation in the time domain Paging occasion adaptation, including limiting paging occasions in the time domain. Note that there may be no increase in paging latency. -Note that unless a significant benefit can be demonstrated, there may be no adverse impact on legacy UE.

[0182] 4) For the above features, corresponding core requirements may be specified.

[0183] For a cell supporting on-demand SSB SCell operation and case #2 (i.e., always-on SSBs are periodically transmitted on the cell), the CSI reporting configuration may be associated with both the AO-SSB and the OD-SSB. Which SSB to measure may be up to the UE implementation as long as the requirements are met. This may apply at least when the AO-SSB and the OD-SSB have the same center frequency and the same position within the same SSB burst. Note that if the timeRestrictionForChannelMeasurements parameter in the upper layer parameter CSI-ReportConfig is set to "configured," the UE may decide to measure both SSBs or one of them. Also, in the above case #2, the CSI reporting configuration may be associated only with the OD-SSB. This may apply at least when the AO-SSB and the OD-SSB have different center frequencies.

[0184] SS-RSRP (Reference signal received power) or SS-SINR (Signal-to-Interference-plus-Noise Ratio) may be defined as follows:

[0185] · SS-RSRP is the linear average of the power contributions (in [W]) of the resource elements carrying the secondary synchronization signal. · SS-RSRP shall only be measured between reference signals corresponding to SS / PBCH blocks with the same SS / PBCH block index and the same physical layer cell identity.

[0186] When configured as ssb-Index-RSRP or ssb-Index-RSRPIndex, L1-RSRP may be defined as follows: The UE reports SSBRI, where SSBRI k (k≧0) corresponds to the configured (k+1)th entry of the associated csi-SSB-ResourceList in the corresponding CSI-SSB-ResourceSet.

[0187] If L1-SINR is configured as ssb-Index-SINR or ssb-Index-SINRIndex, the UE derives L1-SINR conditioned on the reported SSBRI, where SSBRI k (k≧0) corresponds to the configured (k+1)-th entry of the associated csi-SSB-ResourceList in the corresponding CSI-SSB-ResourceSet for channel measurements and the (k+1)-th entry of the associated csi-IM-Resource in the corresponding csi-IM-ResourceSet (if configured) or the (k+1)-th entry of the associated nzp-CSI-RS-Resource in the corresponding NZP-CSI-RS-ResourceSet (if configured) for interference measurements.

[0188] Fig. 12 is a diagram illustrating an example of CSI configuration according to a tenth embodiment of the present invention. Periodic CSI (P (periodic)-CSI) reporting, aperiodic (AP (aperiodic)-CSI) CSI reporting, and semi-persistent CSI (SP (semi-persistent)-CSI) reporting may be configured by the information elements illustrated in Fig. 12.

[0189] The AP-CSI-RS and AP-CSI are jointly triggered by a DCI. The AP-CSI-RS for channel measurements is transmitted in an offset slot relative to the DCI that triggers the AP-CSI. NZP-CSI-RS-ResourceSet-aperiodicTriggeringOffset INTEGER(0.6) contains the offset X between the slot containing the DCI that triggers the aperiodic NZP CSI-RS resource set and the slot in which the CSI-RS resource set is transmitted, where a value of 0 corresponds to 0 slots, a value of 1 corresponds to 1 slot, a value of 2 corresponds to 2 slots, a value of 3 corresponds to 3 slots, a value of 4 corresponds to 4 slots, a value of 5 corresponds to 16 slots, and a value of 6 corresponds to 24 slots.

[0190] CSI-IM is set to the same time slot as AP-CSI-RS for efficient CSI measurement, and the aperiodic trigger offset of CSI-IM follows the offset of the associated NZP CSI-RS for channel measurement.

[0191] SP-CSI-RS and SP-CSI are triggered separately (SP-CSI-RS can also be used for AP-CSI). SP CSI-RS / CSI-IM are activated / deactivated by MAC CE. SP-CSI on PUCCH is activated / deactivated by MAC CE. SP-CSI on PUSCH is activated / deactivated by DCI.

[0192] The SS / PBCH Block Resource indicator (SSBR1) may be defined as follows (see Non-Patent Document 7):

[0193] The UE reports the SSBRI to the network when the upper layer parameter reportQuantity included in the CSI-ReportConfig is "ssb-Index-RSRP" or "ssb-Index-RSRP-Index." For example, the UE may include the SSBRI in a CSI report.

[0194] For CSI reports set by "ssb-Index-RSRP" or "ssb-Index-RSRPIndex", SSBRIk (k≧0) corresponds to the configured (k+1)th entry of the associated csi-SSB-ResourceList in the corresponding CSI-SSB-ResourceSet. For CSI reports set by "ssb-Index-SINR" or "ssb-Index-SINRIndex", SSBRIk (k≧0) corresponds to the configured (k+1)-th entry of the associated csi-SSB-ResourceList in the corresponding CSI-SSB-ResourceSet for channel measurement and the (k+1)-th entry of the associated csi-IM-Resource in the corresponding csi-IM-ResourceSet for interference measurement (if configured) or the (k+1)-th entry of the associated nzp-CSI-RS-Resources in the corresponding NZP-CSI-RS-ResourceSet (if configured).

[0195] The payload of SSBRI may be defined as follows (see Non-Patent Document 8): The bit width of SSBRI is ceil{log2(K s SSB )}. K s SSB is the configured number of SS / PBCH blocks in the corresponding resource set for reporting "ssb-Index-RSRP" or "ssb-Index-RSRP-Index" or "ssb-Index-SINR" or "ssb-Index-SINR-Index".

[0196] Note that both sets of SSBs may be measured. The best beam SSBRI may be selected from the beams of the union of AO-SSB (Always-on SSB) and OD-SSB (On-demand SSB). For measurement of beams with the same SSB index (i.e., QCLed) between two SSB sets, the UE implementation may determine whether it is acceptable to measure one or both of the QCLed SSB beams. Note that only OD-SSB may be measured. The best beam SSBRI may be selected from the OD-SSB beams.

[0197] Note that, in the case of a CSI reporting configuration having only OD-SSB, the UE may report SSBRI based only on activated OD-SSB, and in the case of a CSI reporting configuration having only OD-SSB, the UE may assume that the CSI reporting configuration is deactivated when all OD-SSBs are deactivated.

[0198] Here, for SSB resource set configuration and SSBRI definition, the current CSI resource configuration framework may be reused for OD-SSB-based CSI reporting. An OD-SSB configuration method for SSB resource set configuration may be specified. SSBRI may be newly or additionally defined. UE behavior when OD-SSB is not activated (e.g., there is no SSB to be measured) may be specified.

[0199] The OD-SSB configuration for SSB resource set configuration may be performed as follows: Note that in legacy, SSB indices are configured in the SSB resource set (i.e., CSI-SSB-ResourceSet), and RSRP / SINR are measured at each of the SSB indices in the set.

[0200] For SSB index configuration for the SSB resource set for measurements, one of the following may be applied:

[0201] Action 1: SSB indices not included in ssb-PositionsInBurst (SSB positions in a burst) can be configured for measurement. For example, SSB indices whose corresponding bit in ssb-PositionsInBurst is set to a value of "0" can be configured in the csi-SSB-ResourceList in the corresponding CSI-SSB-ResourceSet for measurement. These SSB indices can be configured and / or activated by OD-SSB.

[0202] Action 2: The SSB indices included in ssb-PositionsInBurst and od-ssb-PositionsInBurst (on-demand SSB positions in a burst) can be configured for measurement. ssb-PositionsInBurst can be related to [one configured / activated / all RRC configured] OD-SSB configuration for [BWP / serving cell]. For example, SSB indices whose corresponding bit in ssb-PositionsInBurst is set to a value of '1' or whose corresponding bit in od-ssb-PositionsInBurst is set to a value of '1' can be configured in the csi-SSB-ResourceList of the corresponding CSI-SSB-ResourceSet for measurement.

[0203] Action 3: It can be set to measure all SSB indices, whether they are included in ssb-PositionsInBurst or od-ssb-PositionsInBurst. For example, from 0 to L max An SSB index up to -1 may be set in the csi-SSB-ResourceList in the corresponding CSI-SSB-ResourceSet for measurement, where L max is the maximum number of SSB indices for a particular configuration according to existing specifications.

[0204] Action 4: The SSB indexes included in ssb-PositionsInBurst and od-ssb-PositionsInBurst are set to be measured when OD-SSB transmission is indicated or adaptation is indicated, and the SSB indexes included in ssb-PositionsInBurst can be set to be measured when OD-SSB is transmitted.

[0205] The SSBRI definition or derivation for CSI reporting using OD-SSB may be performed as follows: For the definition of SSBRI, the following alternatives (Alt) are possible:

[0206] Alt.1:SSBRI or SSBRI+1 is the entry index in the corresponding SSB list for the measurement.

[0207] Alt. 2: SSBRI or SSBRI+1 is the entry index of the AO-SSB and / or RRC-configured OD-SSB in the corresponding SSB list for measurement. For example, if an OD-SSB is configured for a BWP or serving cell, SSB indices not included in the AO-SSB and / or RRC-configured OD-SSB may not be considered when deriving SSBRI.

[0208] Alt. 3: SSBRI or SSBRI+1 is the entry index of the AO-SSB and / or activated OD-SSB in the corresponding SSB list for measurement. For example, if an OD-SSB is configured and activated for a BWP or serving cell, SSB indices not included in the AO-SSB and / or activated OD-SSB may not be considered when deriving SSBRI.

[0209] Alt. 4: SSBRI or SSBRI+1 is an entry index from the union list of AO-SSB and / or RRC-configured OD-SSB. For example, if OD-SSB is configured for a BWP or serving cell, the SSB index in the union list of AO-SSB and / or RRC-configured OD-SSB may be considered when deriving SSBRI.

[0210] Alt. 5: SSBRI or SSBRI+1 is the entry index from the union list of AO-SSB and / or activated OD-SSB. For example, if an OD-SSB is configured for a BWP or serving cell, the SSB index in the union list of AO-SSB and / or activated OD-SSB may be taken into account when deriving SSBRI.

[0211] Alt. 6: SSBRI or SSBRI+1 is the entry index from the union list of all possible SSBs. For example, if OD-SSB is configured for BWP or serving cell, the maximum number of SSBs is 8, e.g., L max = 8, it may be assumed that 8 SSBs are set in the union list.

[0212] Alt. 7: SSBRI or SSBRI+1 is the SSB index. For example, if OD-SSB is configured or activated for a BWP or serving cell, the reported SSBRI may be the SSB index.

[0213] The bit width of SSBRI is ceil{log2(K s SSB )}. K of each of the above Alt. s SSB may be defined as follows:

[0214] Alt.1:K s SSB is the configured number of SSBs in the corresponding SSB list. Alt.2:K s SSB is the number of SSBs in the corresponding SSB list excluding SSBs that are not BWPs or AO-SSBs for the serving cell or RRC-configured OD-SSBs. Alt.3:K s SSB is the number of SSBs in the corresponding SSB list excluding SSBs that are not BWPs or AO-SSBs or activated OD-SSBs for the serving cell. Alt.4:K s SSB is the number of different SSBs in the union list of AO-SSBs and / or RRC-configured OD-SSBs for the BWP or serving cell. Alt.5:K s SSB is the number of different SSBs in the union list of AO-SSBs and / or activated OD-SSBs for the BWP or serving cell. Alt.6:K s SSB L max is equal to. Alt.7:K s SSB L max is equal to.

[0215] 14 is a diagram illustrating an example of a CSI report according to a tenth embodiment of the present invention. As shown in FIG. 14, the SSBRI may be derived. L max =8 AO-SSB:ssb-PositionsInBurst = '01001100' OD-SSB#1:od-ssb-PositionsInBurst#1 = '10001110' OD-SSB#2:od-ssb-PositionsInBurst#2 = '10011000' An example of deriving SSBRI when OD-SSB#1 is activated and SSB index#6 is the best SSB is shown.

[0216] Alt. 1: SSBRI or SSBRI+1 is the entry index in the corresponding SSB list for the measurement. Six entries are included in the list, and SSBRI is derived as 5.

[0217] Alt. 2: SSBRI or SSBRI+1 is the entry index of the AO-SSB and / or RRC-configured OD-SSB in the corresponding SSB list for measurement. For example, if an OD-SSB is configured for a BWP or serving cell, SSB indices not included in the AO-SSB and / or RRC-configured OD-SSB may not be considered when deriving SSBRI. As shown in Figure 14, SSB#2 is neither an AO-SSB nor an RRC-configured OD-SSB, so it is excluded from SSBRI derivation. Five entries are included in the list, and SSBRI is derived as 4.

[0218] Alt. 3: SSBRI or SSBRI+1 is the entry index of the AO-SSB and / or activated OD-SSB in the corresponding SSB list for measurement. For example, if an OD-SSB is configured and activated for a BWP or serving cell, SSB indices not included in the AO-SSB and / or activated OD-SSB may not be considered when deriving SSBRI. As shown in Figure 14, SSB#2 and SSB#3 are neither AO-SSB nor activated OD-SSB, and therefore are excluded from SSBRI derivation. Four entries are included in the list, and SSBRI is derived as 3.

[0219] Alt. 4: SSBRI or SSBRI+1 is the entry index from the union list of AO-SSB and / or RRC-configured OD-SSB. For example, if OD-SSB is configured for BWP or serving cell, the SSB index in the union list of AO-SSB and / or RRC-configured OD-SSB may be considered when deriving SSBRI. Six entries are included in the list, and SSBRI is derived as 5.

[0220] Alt. 5: SSBRI or SSBRI+1 is the entry index from the union list of AO-SSB and / or activated OD-SSB. For example, if OD-SSB is configured for a BWP or serving cell, the SSB index in the union list of AO-SSB and / or activated OD-SSB may be considered when deriving SSBRI. Five entries are included in the list, and SSBRI is derived as 4.

[0221] Alt. 6: SSBRI or SSBRI+1 is the entry index from the union list of all possible SSBs. For example, if OD-SSB is configured for BWP or serving cell, the maximum number of SSBs is 8, e.g., L max If = 8, it may be assumed that 8 SSBs are set in the union list. 8 entries are included in the list, and SSBRI is derived as 6.

[0222] Alt. 7: SSBRI or SSBRI+1 is the SSB index. For example, if OD-SSB is configured or activated for the BWP or serving cell, the reported SSBRI may be the SSB index. Eight entries are included in the list, and SSBRI is derived as 6.

[0223] The UE measurement and reporting behavior may be performed as follows:

[0224] The behavior of the UE when OD-SSB is not activated (eg, when there are no SSBs to measure) may be specified.

[0225] In the case of CSI reporting associated with only OD-SSB, if the UE is requested to report CSI and OD-SSB is not activated (e.g., there is no SSB to measure), any of 1)-4) below may be performed.

[0226] 1) The UE ignores signaling or triggering for CSI reporting. 2) The UE drops the CSI or the UE does not report the CSI. 3) If the UE is configured for periodic or semi-persistent CSI reporting, it reports the last measured CSI. 4) The UE notifies the gNB that CSI is not reported.

[0227] The purpose of L1-SSB measurements is to identify the best SSB with the largest RSRP or SINR. However, if OD-SSB is activated or not, the best SSB may be different. If the UE can report two SSBRIs, one corresponds to the best SSB of AO-SSB, and the other corresponds to the best SSB of OD-SSB and AO-SSB.

[0228] If the CSI reporting configuration is associated with both AO-SSB and OD-SSB, the UE may be indicated / predefined to report multiple SSBRIs and, if configured, corresponding RSRP or SINR. The multiple SSBRIs may include one or more of the following options 1)-3).

[0229] Option 1) One SSBRI selected from the SSB indexes of AO-SSB. If AO-SSB and OD-SSB have different center frequencies, the UE can measure SSB on AO-SSB, or either AO-SSB or OD-SSB, or both AO-SSB and OD-SSB, or on the frequency where OD-SSB is indicated. It may be assumed that there is at least one SSB index overlap between OD-SSB and AO-SSB.

[0230] Option 2) One SSBRI selected from the SSB indexes of OD-SSB. If AO-SSB and OD-SSB have different center frequencies, the UE can measure SSBs at the frequencies of AO-SSB, or either AO-SSB or OD-SSB, or both AO-SSB and OD-SSB. It may be assumed that there is at least one SSB index overlap between OD-SSB and AO-SSB.

[0231] Option 3) One SSBRI selected from both the AO-SSB and OD-SSB SSB indices.

[0232] The UE may be instructed or predefined to report multiple SSBRIs as follows: ·Do not report SSBRI (and corresponding RSRP / SINR, if configured). Report one SSBRI (and corresponding RSRP / SINR, if configured) as option 1 or option 2 or option 3. · Report the two SSBRIs (and corresponding RSRP / SINR, if configured) as Option 1 + Option 3 or Option 2 + Option 3 or Option 1 + Option 2. Report the three SSBRIs (and corresponding RSRP / SINR, if configured) as option 1 + option 2 + option 3.

[0233] The UE may be informed by RRC / MAC-CE signaling about how to report multiple SSBRIs. An RRC parameter, i.e., od-ssb-multi-SSBRI, may be set in the CSI reporting configuration to indicate how to report the SSBRIs.

[0234] Note that od-ssb-multi-SSBRI is valid and may be set only when one or more of the following are met; otherwise, the UE may ignore it. OD-SSB is configured or activated for the BWP or serving cell, and / or The OD-SSB is associated with a CSI reporting configuration, and / or · Both AO-SSB and OD-SSB are associated with the CSI reporting configuration.

[0235] The UE may report the following capabilities to the network: Ability of each movement The ability of each option in each action, or the ability of a combination of options Ability to choose each option for each action, or ability to combine options

[0236] The UE can report the above capabilities per frequency, or it may report capabilities per UE, per FR1, FR2, FR2-1, FR2-2, per SCS, per band, per BC, per FC, or per FSPC.

[0237] The UE can report the above capabilities on a cell-by-cell basis, or it may report capabilities on a UE-by-UE basis, a cell-by-cell basis, or a TDD and FDD-by-TDD basis.

[0238] Throughout the operation, which operations are applied and / or which options or alternatives are used may be determined as follows. - Set by higher level parameters. -Determined by the relevant higher later parameters -indicated by MAC-CE or DCI -Determined based on UE capabilities -As stated in the statement - Based on the terms and conditions stated in the specification -Determined by upper layer parameters / MAC-CE / DCI settings and reported terminal capabilities (combination of the above decisions)

[0239] Throughout the operation, multiple options and alternatives may be combined into one option / alternative.

[0240] Throughout operation, the UE may assume that some actions, options for actions, or alternatives to actions may only be applied when the UE reports support for a certain feature or model.

[0241] Throughout the operation, a serving cell may be interpreted as a serving beam or a serving SpCell.

[0242] Throughout the operation, neighboring cells may be interpreted as cells other than the serving beam or serving SpCell.

[0243] The UE may receive the following types of information from the NW (NW can be rephrased by gNB throughout the proposal): Information via higher layer signaling (e.g., RRC messages / LPP messages) MAC-CE, MAC-CE with a new LCID in the subheader, extending an existing MAC-CE (e.g., introducing a new octet) DCI, DCI field: existing DCI field or newly introduced DCI field, RNTI: DCI with CRC scrambled by existing RNTI or newly introduced RNTI, DCI format: existing DCI format or newly introduced DCI format Combination of the above information

[0244] The UE may receive information from the NW in the following periodic types: Opt1: Periodic Opt2: Semi-persistent (triggered by UE or gNB indication) Opt3: Aperiodic (triggered by UE or gNB indication)

[0245] The UE may receive information regarding the QCL of QCL type A, QCL type B, QCL type C, or QCL type D from the NW.

[0246] For the UE, the QCL resource RS for each QCL type may be any of SSB, CSI-RS, CSI-RS with repetition, TRS, PDCCH-DMRS, and PDSCH-DMRS.

[0247] The information from the network may be set or notified commonly to all UEs, may be set or notified individually to all UEs, may be set or notified specifically to all cells, may be set or notified commonly to all cells, may be set or notified per UE, may be set or notified per CC, may be set or notified per BWP, may be set or notified per band, may be set or notified per cell, or may be set or notified per cell group.

[0248] The UE may send the following types of information to the NW (NW can be rephrased by gNB throughout the proposal): Information via higher layer signaling (e.g., RRC messages / LPP messages) MAC-CE, MAC-CE with a new LCID in the subheader, extending an existing MAC-CE (e.g., introducing a new octet) ·UCI, UCI on PUCCH, UCI on PUSCH UAI, may be accompanied by a simple reason for non-application. Combination of the above information

[0249] The UE may report information to the NW in the following periodic types: Opt1: Periodic Opt2: Semi-persistent (triggered by UE or gNB indication) Opt3: Aperiodic (triggered by UE or gNB indication)

[0250] The above-described embodiment allows the UE to perform CSI measurements covering at least the on-demand SSB and transmit a CSI report including the SSBRI to the base station.

[0251] That is, a technique is provided in which a terminal performs CSI (Channel State Information) measurement and reporting using on-demand SSBs (SS / PBCH Blocks) transmitted from a base station capable of transitioning to a power saving state.

[0252] (Device configuration) Next, a description will be given of an example of the functional configuration of the base station 10 and the terminal 20 that execute the processes and operations described above. The base station 10 and the terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions of the embodiments.

[0253] <Base station 10> Fig. 15 is a diagram showing an example of the functional configuration of the base station 10 in the embodiment of the present invention. As shown in Fig. 15, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 15 is merely an example. The functional divisions and names of the functional units may be any names as long as they can perform the operations related to the embodiment of the present invention. The transmitting unit 110 and the receiving unit 120 may be collectively referred to as a communication unit.

[0254] The transmitter 110 includes a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The transmitter 110 also transmits setting information, instructions, notifications, etc. related to a low-power wake-up signal to the terminal 20. The transmitter 110 also transmits notifications related to switching of monitoring operations to the terminal. The receiver 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of higher layers from the received signals. The transmitter 110 also has a function of transmitting PSS, SSS, PBCH, DL / UL control signals, etc. to the terminal 20. The receiver 120 also receives inter-network node messages from other network nodes.

[0255] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information related to the operations described in the embodiments.

[0256] The control unit 140 controls settings, instructions, and notifications related to the operations described in the embodiments. The function unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the function unit related to signal reception in the control unit 140 may be included in the receiving unit 120.

[0257] <Terminal 20> Fig. 16 is a diagram showing an example of the functional configuration of terminal 20 in the embodiment of the present invention. As shown in Fig. 16, terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Fig. 16 is merely an example. As long as the operations related to the embodiment of the present invention can be performed, the names of the functional divisions and functional units may be any. Transmitting unit 210 and receiving unit 220 may be collectively referred to as a communication unit.

[0258] The transmitter 210 creates a transmission signal from transmission data and transmits the transmission signal wirelessly. The transmitter 210 also transmits capability information related to the low-power wake-up signal to the base station 10. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The receiver 220 also has a function of receiving PSS, SSS, PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. The receiver 220 also receives paging notification information and configuration information, instructions, and notifications related to the low-power wake-up signal from the base station 10. For example, the receiver 220 receives a low-power wake-up signal from the base station 10. The setting unit 230 stores various configuration information received by the receiver 220 from the base station 10. The setting unit 230 also stores pre-configured configuration information. The content of the configuration information is, for example, information related to the operations described in the embodiments.

[0259] As described in the embodiments, the control unit 240 controls settings, instructions, and notifications related to the operations described in the embodiments. A functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and a functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.

[0260] (Hardware configuration) The block diagrams (FIGS. 15 and 16) 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 one 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, by wire, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the one device or the multiple devices with software.

[0261] 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. Fig. 17 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 above-described base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0262] 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 base station 10 and the terminal 20 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.

[0263] Each function in the base station 10 and the terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001, memory 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls the reading, writing, or both reading and writing of data in the memory 1002 and storage 1003.

[0264] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, a baseband signal processing unit, a call processing unit, etc. may be realized by the processor 1001. Although only one processor 1001 is shown in the figure, there may be multiple processors.

[0265] The processor 1001 also 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 terminal 20 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 a single 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 the communication device 1004, for example.

[0266] 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).

[0267] 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.

[0268] 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.

[0269] The communication device 1004 is hardware (transmitting / receiving 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, a transmitting / receiving antenna, an amplifier unit, a transmitting / receiving unit, or a transmission path interface may be realized by the communication device 1004. The transmitting / receiving unit may be implemented as a transmitting unit and a receiving unit that are physically or logically separated.

[0270] 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).

[0271] 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.

[0272] Furthermore, base station 10 and terminal 20 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, processor 1001 may be implemented using at least one of these pieces of hardware.

[0273] <Configuration of this embodiment> (Section 1) A receiver that receives from a base station settings related to an on-demand SSB (SS / PBCH Block) and settings for measuring the on-demand SSB; a control unit that measures at least one of the on-demand SSB and the always-on SSB based on the configuration related to the on-demand SSB and the configuration for measuring the on-demand SSB, and derives a CSI (Channel State Information) report; a transmitter that transmits the CSI report to the base station; The control unit derives an SSBRI (SS / PBCH Block Resource indicator) corresponding to at least the on-demand SSB and includes the SSBRI in the CSI report. (Section 2) 2. The terminal of claim 1, wherein the control unit measures resources corresponding to SSB indices that are not included in SSB positions in a burst and derives the CSI report. (Section 3) 2. The terminal of claim 1, wherein the control unit measures resources corresponding to SSB indices included in SSB positions in a burst and SSB indices included in on-demand SSB positions in a burst, and derives the CSI report. (Section 4) The terminal according to claim 1, wherein the control unit derives the SSBRI by excluding the on-demand SSBs that are not configured or activated. (Section 5) 2. The terminal of claim 1, wherein the control unit derives the SSBRI based on a union of the always-on SSB and the on-demand SSB. (Section 6) A procedure for receiving from a base station configuration related to an on-demand SSB (SS / PBCH Block) and configuration for measuring the on-demand SSB; measuring at least one of the on-demand SSB and the always-on SSB based on the configuration related to the on-demand SSB and the configuration for measuring the on-demand SSB, and deriving a CSI (Channel State Information) report; transmitting the CSI report to the base station; and a procedure in which a terminal derives an SSBRI (SS / PBCH Block Resource indicator) corresponding to at least the on-demand SSB and includes the SSBRI in the CSI report.

[0274] Any of the above configurations allows a terminal to perform CSI (Channel State Information) measurement and reporting using on-demand SSBs (SS / PBCH Blocks) transmitted from a base station capable of transitioning to a power saving state. Furthermore, according to paragraphs 2 to 5, a UE can perform CSI measurement targeting at least on-demand SSBs and transmit a CSI report including SSBRI to a base station.

[0275] (Supplementary explanation of the embodiment) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; two or more items may be combined as needed, and items described in one item may apply to items described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0276] The aspects / embodiments described in the present disclosure may be categorized as Long Term Evolution (LTE), LTE-Advanced (LTE-A), International Mobile Telecommunications-Advanced (IMT-Advanced), 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G-Advanced (5G-A), 6th generation mobile communication system (6G), xth generation mobile communication system (x is, for example, an integer or a decimal number)), 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), Institute of Electrical and Electronics Engineers (IEEE) Engineers) 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.), IEEE802.16 (WiMAX (registered trademark), IEEE802.20, 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.

[0277] 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] 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").

[0282] Furthermore, a 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 called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)) or communication of a non-terrestrial network (NTN). In this case, the terminal 20 may be configured to have at least some of the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "sidelink") or terms corresponding to NTN (for example, feeder link or service link). For example, an uplink channel or a downlink channel may be read as a sidelink channel.

[0283] 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).

[0284] In addition, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station 10 may be configured to have the functions of the terminal 20 described above.

[0285] 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 base station 10 and the terminal 20) but also notification between different layers in the same or different devices (e.g., between a lower layer and an upper layer in the base station 10 or the terminal 20). Furthermore, 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 related to) the any information (value) may be notified from any first device (e.g., a terminal / base station) to any second device (e.g., a base station / terminal).

[0286] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless it is consistent. 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.

[0287] 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.

[0288] 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."

[0289] Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched depending on the implementation.

[0290] 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.

[0291] 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.

[0292] 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.

[0293] 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.

[0294] 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.

[0295] 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 within one carrier for terminal 20, and at least one of the BWPs may be activated. Any frequency unit in the present disclosure may be interchangeable with another frequency unit.

[0296] 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.

[0297] 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.

[0298] 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.

[0299] 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.

[0300] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc. [Explanation of symbols]

[0301] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device

Claims

1. A receiver that receives settings related to an on-demand SSB (SS / PBCH Block) and settings for measuring the on-demand SSB from a base station; a control unit that measures at least one of the on-demand SSB and the always-on SSB based on the setting related to the on-demand SSB and the setting for measuring the on-demand SSB, and derives a CSI (Channel State Information) report; a transmitter for transmitting the CSI report to the base station; The control unit derives an SS / PBCH Block Resource indicator (SSBRI) corresponding to at least the on-demand SSB and includes the SSBRI in the CSI report.

2. The terminal of claim 1 , wherein the control unit measures resources corresponding to SSB indices that are not included in SSB positions in a burst and derives the CSI report.

3. The terminal of claim 1 , wherein the control unit measures resources corresponding to SSB indices included in SSB positions in a burst and SSB indices included in on-demand SSB positions in a burst, and derives the CSI report.

4. The terminal according to claim 1 , wherein the control unit derives the SSBRI by excluding the on-demand SSB that has not been configured or activated.

5. The terminal of claim 1 , wherein the control unit derives the SSBRI based on a union of the always-on SSB and the on-demand SSB.

6. A procedure for receiving from a base station a setting related to an on-demand SSB (SS / PBCH Block) and a setting for measuring the on-demand SSB; measuring at least one of the on-demand SSB and the always-on SSB based on the on-demand SSB configuration and the on-demand SSB measurement configuration, and deriving a CSI (Channel State Information) report; transmitting the CSI report to the base station; and a procedure in which a terminal derives an SS / PBCH Block Resource indicator (SSBRI) corresponding to at least the on-demand SSB and includes the SSBRI in the CSI report.

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