Terminals and communication methods

Abstract

A terminal according to an aspect of the present disclosure comprises: a reception unit which receives, from a base station, a parameter associated with a cycle which includes a period of an active state for monitoring transmission from the base station and which takes a non-integer value; and a control unit which, during the cycle and on the basis of the parameter, switches the state of the terminal between the active state and a non-active state in which transmission from the base station is not monitored.

Description

Technical Field

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

Background Art

[0002] The 3rd Generation Partnership Project (3GPP) has standardized the 5th generation mobile communication system (also referred to as 5G, New Radio (NR) or Next Generation (NG)), and is further advancing the standardization of next-generation systems called Beyond 5G, 5G Evolution or 6G.

[0003] In 5G, technologies that satisfy requirements such as large-capacity systems, high data transmission rates, low latency, simultaneous connection of a large number of terminals, low cost, and power saving have been studied (for example, Non-Patent Document 1).

[0004] With the expansion of mobile communication systems as described above, the use and popularization of XR (extended reality) such as VR (virtual reality), AR (augmented reality), and MR (mixed reality), which enable the combination of the real world and the virtual world (virtual content), are expected.

[0005] In 3GPP Release 18, XR-specific power saving (which may also be referred to as power reduction, etc.) is being studied (for example, Non-Patent Document 2). Details are to be studied in the future.

Prior Art Documents

Non-Patent Documents

[0006]

Non-Patent Document 1

Non-Patent Document 2

[0007] Thus, while power saving specific to XR is being considered for future wireless communication systems, the question remains as to how to control this power saving. However, the specific operations related to such control have not been sufficiently studied.

[0008] One aspect of this disclosure provides a terminal and communication method that can conserve power while taking into account the characteristics of XR.

[0009] A terminal according to one aspect of the present disclosure includes a receiving unit that receives from a base station parameters related to a cycle that takes a non-integer value, including a period in which it is in an active state that monitors transmissions from the base station, and a control unit that switches the state of the terminal between the active state and an inactive state in which it does not monitor transmissions from the base station, based on the parameters during the cycle.

[0010] A terminal according to one aspect of the present disclosure includes a receiving unit that receives parameters from a base station relating to a first cycle taking a first integer value and a second cycle taking a second integer value, including a period in which the terminal is in an active state monitoring transmissions from the base station, and a control unit that switches the state of the terminal between the active state and an inactive state that does not monitor transmissions from the base station based on the parameters during the first and second cycles, wherein the sum of n times the first integer value (where n is a predetermined integer from among integers of 1 or more) and m times the second integer value (where m is a predetermined integer from among integers of 1 or more) is equal to k times a predetermined non-integer value (where k is a predetermined integer from among integers of 2 or more).

[0011] A communication method according to one aspect of the present disclosure includes receiving from a base station parameters related to a cycle that takes a non-integer value and includes a period in which the terminal is in an active state monitoring transmissions from the base station, and during the cycle, switching the state of the terminal between the active state and an inactive state in which it does not monitor transmissions from the base station based on the parameters. [Brief explanation of the drawing]

[0012] [Figure 1] This figure shows an example of a wireless communication system according to an embodiment of the present disclosure. [Figure 2] This figure shows an example of a frequency range used in a wireless communication system according to an embodiment of the present disclosure. [Figure 3] This figure shows an example of the configuration of wireless frames, subframes, and slots used in a wireless communication system according to an embodiment of the present disclosure. [Figure 4] This is a diagram illustrating CDRX in 3GPP Release 15. [Figure 5] This is a diagram illustrating WUS in 3GPP Release 16. [Figure 6] This figure shows the existing parameters related to the DRX cycle. [Figure 7] This figure shows the relationship between the XR traffic cycle and the existing DRX cycle. [Figure 8A] This figure shows an example of parameters used to indicate the DRX cycle according to an embodiment of the present disclosure. [Figure 8B] This figure shows an example of parameters used to indicate the DRX cycle according to an embodiment of the present disclosure. [Figure 9] This figure shows examples of the number of wireless frames, slots, and symbols representing DRX cycles according to embodiments of the present disclosure. [Figure 10A] This figure shows an example of parameters used to indicate the DRX cycle according to an embodiment of the present disclosure. [Figure 10B] FIG. 1 is a diagram illustrating an example of parameters used to indicate a DRX cycle according to an embodiment of the present disclosure. [Figure 11] FIG. 2 is a diagram illustrating an example of start timing of a DRX on-duration according to an embodiment of the present disclosure. [Figure 12A] FIG. 3 is a diagram illustrating an example of a combination of different DRX cycles according to an embodiment of the present disclosure. [Figure 12B] FIG. 4 is a diagram illustrating an example of a combination of different DRX cycles according to an embodiment of the present disclosure. [Figure 12C] FIG. 5 is a diagram illustrating an example of a combination of different DRX cycles according to an embodiment of the present disclosure. [Figure 13] FIG. 6 is a block diagram illustrating an example of a configuration of a base station according to an embodiment of the present disclosure. [Figure 14] FIG. 7 is a block diagram illustrating an example of a configuration of a terminal according to an embodiment of the present disclosure. [Figure 15] FIG. 8 is a diagram illustrating an example of a hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. [Figure 16] FIG. 9 is a diagram illustrating an example of a configuration of a vehicle according to an embodiment of the present disclosure. MODE FOR CARRYING OUT THE INVENTION

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

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

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

[0016] NG-RAN20 includes base station 100A (hereinafter also referred to as gNB100A) and base station 100B (hereinafter also referred to as gNB100B). When it is not necessary to distinguish between gNB100A, gNB100B, etc., they are collectively referred to as gNB or base station 100. Furthermore, the number of gNBs and UEs is not limited to the example shown in Figure 1.

[0017] NG-RAN20 actually includes multiple NG-RAN nodes, specifically gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). Note that NG-RAN20 and 5GC may simply be referred to as "the network." Furthermore, in the following, gNB may be read as "network (NW)."

[0018] gNB100A and gNB100B are, for example, 5G-compliant base stations that perform 5G-compliant wireless communication with the UE200. gNB100A, gNB100B, and UE200 may support MIMO (Multiple-Input Multiple-Output), which generates a more directional beam BM by controlling the wireless signals transmitted from multiple antenna elements; Carrier Aggregation (CA), which uses multiple component carriers (CC); and Dual Connectivity (DC), which enables communication between the UE and each of the two NG-RAN nodes.

[0019] Furthermore, the wireless communication system 10 may support multiple frequency ranges (FRs). Figure 2 shows an example of an FR used in the wireless communication system 10. As shown in Figure 2, the wireless communication system 10 may support FR1 and FR2. The frequency bands of each FR are, for example, as follows. FR1: 410MHz~7.125GHz FR2: 24.25GHz~52.6GHz

[0020] In FR1, a subcarrier spacing (SCS) of 15kHz, 30kHz, or 60kHz may be used, and a bandwidth (BW) of 5 to 100MHz may be used. FR2 is a higher frequency than FR1, and an SCS of 60kHz or 120kHz (240kHz may be included) may be used, and a bandwidth (BW) of 50 to 400MHz may be used.

[0021] Note that SCS may also be interpreted as numerology. Numerology is defined in 3GPP TS 38.300 and corresponds to a single subcarrier interval in the frequency domain.

[0022] Furthermore, the wireless communication system 10 may support higher frequency bands than the FR2 frequency band. Specifically, the wireless communication system 10 may support frequency bands exceeding 52.6 GHz and up to 114.25 GHz. Such high frequency bands may be conveniently referred to as "FR2x". When using a bandwidth exceeding 52.6 GHz, a CP-OFDM (Cyclic Prefix - Orthogonal Frequency Division Multiplexing) / DFT-S-OFDM (Discrete Fourier Transform - Spread - Orthogonal Frequency Division Multiplexing) with a larger SCS may be applied.

[0023] Figure 3 shows an example of the configuration of wireless frames (system frames), subframes, and slots used in the wireless communication system 10. As shown in Figure 3, one slot consists of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). However, the SCS is not limited to the interval (frequency) shown in Figure 3. For example, 480 kHz, 960 kHz, etc. may be used as the SCS.

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

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

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

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

[0028] The channels used to transmit DL signals include, for example, a data channel and a control channel. For example, the data channel may include a Physical Downlink Shared Channel (PDSCH), and the control channel may include a Physical Downlink Control Channel (PDCCH). For example, gNB100 transmits control information to UE200 using the PDCCH and transmits DL data signals using the PDSCH. Note that PDSCH is an example of a Downlink Shared Channel, and PDCCH is an example of a Downlink Control Channel. Note that PDCCH may be interpreted as Downlink Control Information (DCI), control information, etc., transmitted in the PDCCH.

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

[0030] The UE200 is a communication device equipped with wireless communication capabilities, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module.

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

[0032] For example, the UE200 receives control information, setting information, etc., from the gNB100 as DL signals to enable power saving for the UE200.

[0033] Furthermore, for example, the UE200 transmits control information, data signals, and terminal capability information of the UE200 to the gNB100 as UL signals.

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

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

[0036] <Discussion status of XR-specific power saving> XR presents an attractive use case for future wireless communication systems. On the other hand, XR also imposes issues that need to be considered and addressed. As one of such issues, in 3GPP Release 18, methods for realizing XR-specific power saving in consideration of the characteristics of XR are being studied (for example, Non-Patent Document 2).

[0037] <Terminal power saving> Regarding the power saving function of terminals, Connected Mode Discontinuous Reception (CDRX) was introduced in 3GPP Release 15, and a Wake Up Signal (WUS) for terminals to monitor control signals with low power consumption was introduced in 3GPP Release 16. Note that CDRX may be simply referred to as DRX, and may be written as DRX hereinafter.

[0038] The DRX function is configured by an upper layer (RRC: Radio Resource Control) and controls PDCCH monitoring.

[0039] Figure 4 is a diagram for explaining CDRX. In the CDRX operation according to 3GPP Release 15, a terminal is active during a DRX on-duration in a DRX cycle, and monitors PDCCH within the DRX on-duration. Note that (DRX) on-duration may be rephrased as an active period, a period during which the terminal is active, a period during which the terminal is in an active state, an on-period, a wake-up period, a valid period, an activation period, or the like. Also, a state may be rephrased as a mode. Note that elements shown in Figure 4 and the drawings described hereinafter are not drawn to scale.

[0040] Figure 5 is a diagram illustrating WUS in 3GPP Release 16. In 3GPP Release 16, PDCCH-based WUS can instruct one or more terminals whether to monitor PDCCH within the next DRX onduration.

[0041] DCI format 2_6, in which the CRC (Cyclic Redundancy Check) is scrambled by 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).

[0042] The WUS monitoring occasion is set by an offset from the DRX onduration based on the terminal's capabilities. If the WUS indicates "Not Active" (i.e., there is no data being sent or received by the terminal), the terminal can skip monitoring within the DRX onduration and immediately enter sleep mode.

[0043] Furthermore, a default terminal operation may be set in case the PDCCH-based WUS is not detected due to, for example, a detection error.

[0044] DCI format 2_6 includes a 1-bit wake-up indicator that indicates "active" or "inactive".

[0045] Note that "active" may be interpreted as active mode, active state, startup state, on (state), enabled (state), enabled state, etc., and "inactive" may be interpreted as inactive state, inactive mode, sleep, off, disabled, hibernate, dormant, etc.

[0046] The above DRX operation is controlled by a higher layer by setting the values ​​of parameters including the following timers (which may also be called DRX parameters or settings (information), parameters or settings (information) related to DRX, parameters or settings (information) related to power saving, parameters or settings (information) related to cycles including the active period, etc.). drx-onDurationTimer · drx-SlotOffset • drx-LongCycleStartOffset • drx-InactivityTimer DRX ShortCycle • drx-ShortCycleTimer ·drx-HARQ-RTT-TimerDL ·drx-HARQ-RTT-TimerUL · drx-RetransmissionTimerDL · drx-RetransmissionTimerUL

[0047] [When only long DRX cycles are configured] Each long DRX cycle includes an active period and a sleep period. The active period is set using the parameter drx-onDurationTimer. The start position of the long DRX cycle is set using the parameter drx-LongCycleStartOffset. The start position of the active period is set using the parameter drx-LongCycleStartOffset. Furthermore, the start position of the active period relative to the subframe boundary is set using the parameter drx-SlotOffset.

[0048] The device remains active during the active period and enters sleep mode if no PDCCH is received during the active period.

[0049] On the other hand, if PDCCH instructs a new UL or DL ​​transmission, the terminal starts or restarts the DRX inactivity timer, which is set as the parameter drx-InactivityTimer. The terminal remains active and continues PDCCH monitoring until this timer expires.

[0050] [When both long DRX cycles and short DRX cycles are set] If there is no data activity during the active period of the long DRX cycle, the device will operate according to the long DRX cycle described above (and therefore enter sleep mode).

[0051] On the other hand, if there is data activity during the active period of a long DRX cycle, the terminal will operate according to the short DRX cycle. The short DRX cycle is configured using the parameter drx-ShortCycle. The active period of the short DRX cycle is configured using the same parameter drx-onDurationTimer as the long DRX cycle. The start position of the active period is configured using drx-StartOffset and drx-SlotOffset, similar to the long DRX cycle.

[0052] Note that setting the short DRX cycle is optional; if the short DRX cycle is not set, the terminal will operate according to the long DRX cycle described above.

[0053] [Resend process] Two timers (drx-HARQ-RTT-TimerDL and drx-RetransmissionTimerDL) exist for a terminal to receive DL retransmissions. The period until a DL retransmission is expected is set using drx-HARQ-RTT-TimerDL, which is started with the symbol after the terminal sends a NACK in the UL. The period until a DL retransmission is received is set using drx-RetransmissionTimerDL, which is started with the symbol after drx-HARQ-RTT-TimerDL has expired. When a terminal detects a DL transmission for the corresponding HARQ process, it stops drx-RetransmissionTimerDL.

[0054] Two timers (drx-HARQ-RTT-TimerUL and drx-RetransmissionTimerUL) exist for a terminal to receive a grant for UL retransmission. The period until a grant for UL retransmission is expected is set using drx-HARQ-RTT-TimerUL, which starts on the symbol after the terminal sends a PUSCH in the UL. The period until a grant for UL retransmission is received is set using drx-RetransmissionTimerDL, which starts on the symbol following the expiration of drx-HARQ-RTT-TimerDL. When the terminal detects a grant for UL retransmission for the corresponding HARQ process, it stops drx-RetransmissionTimerUL.

[0055] Traditionally, power saving in terminals has been achieved in the following ways, for example.

[0056] <Consideration> XR traffic is assumed to have a periodic nature, corresponding to the frame rate (FPS (frames per second)). The period of such XR traffic can be a non-integer, such as 16.67 milliseconds or 8.33 milliseconds.

[0057] On the other hand, the long DRX cycle (hereinafter referred to as the DRX cycle) is an integer in milliseconds, such as ms10 (10 milliseconds), ms20 (20 milliseconds), etc., as shown in the existing parameter drx-LongCycleStartOffset (drx-LongCycle on the left) in Figure 6. The start offset (drx-StartOffset) is shown on the right side of Figure 6.

[0058] Here, as shown in Figure 7, consider the case where XR traffic with a period of 16.67 milliseconds periodically arrives at a terminal with a DRX cycle set to 20 milliseconds. As shown on the far left of Figure 7, even if a certain arrival timing of XR traffic falls within the terminal's active period, as shown on the right of Figure 7, the timing of subsequent XR traffic arrivals gradually shifts within the DRX cycle. As a result, a significant delay occurs, especially for XR traffic arriving at the timing on the far right of Figure 7, until the next DRX duration. Thus, because the period of XR traffic and the DRX cycle are not aligned, a large delay can occur depending on the timing of the XR traffic arrival.

[0059] Conversely, such delays can be reduced by shortening the DRX cycle. However, the additional active period or increase in the active period associated with shortening the DRX cycle may result in increased power consumption of the terminal.

[0060] Therefore, this embodiment describes an example in which power saving of the terminal can be achieved in accordance with the characteristics of XR traffic. Specifically, as described below, power saving of the terminal can be achieved in accordance with the characteristics of XR traffic by aligning the arrival period, which takes a non-integer value and is one of the characteristics of XR traffic, with the terminal's DRX cycle (which may also be called the intermittent reception period, etc.).

[0061] <Proposal 1> Defining / setting / notifying DRX cycles in units of wireless frames, slots and / or symbols The DRX cycle may be specified in the specification by using the number of radio frames (or frames), the number of slots, and / or symbols (and thus in units of radio frames, slots, and / or symbols) to represent a non-integer value such as 16.67 milliseconds or 8.33 milliseconds. Alternatively, the DRX cycle may be set or notified to the terminal 200 by using the number of radio frames, the number of slots, and / or symbols (and thus in units of radio frames, slots, and / or symbols) to represent a non-integer value. The number of radio frames, the number of slots, and / or symbols may be set or notified, for example, using RRC signaling, MAC (Medium Access Control) signaling (e.g., MAC CE (Control Element)), and / or DCI. The number of wireless frames, the number of slots, and / or the number of symbols may be referred to as DRX parameters or settings (information), parameters or settings (information) related to DRX, parameters or settings (information) related to power saving, parameters or settings (information) related to cycles including the active period, etc.

[0062] Furthermore, when setting the parameters as described above, it is also possible to utilize SFN (System Frame Number). For example, X may be notified by upper-layer signaling, and the DRX cycle may be set based on the position where SFN mod X = 0.

[0063] Figures 8A and 8B show examples of new parameters (information elements) for DRX that are introduced and defined for this purpose.

[0064] Figure 8A shows the number of wireless frames (1, 2, 3, etc.), the number of slots (1, 2, 3, etc.), and the number of symbols (1, 2, 3, etc.) used to indicate a DRX cycle. Note that while the names drx-LongCycleFrame-rel18, drx-LongCycleSlot-rel18, and drx-LongCycleSymbol-rel18 are shown as examples, the parameter names are not limited to these illustrated examples.

[0065] Figure 8B shows the parameters used to indicate the start offset, similar to Figure 6, along with the parameters shown in Figure 8A that are used to indicate the DRX cycle. Note that the names drx-LongCycleStartOffsetFrame-rel18, drx-LongCycleStartOffsetSlot-rel18, and drx-LongCycleStartOffsetSymbol-rel18 are shown as examples, but the names of the parameters are not limited to these illustrated examples.

[0066] The parameters shown in Figures 8A and 8B do not necessarily have to be defined separately for the wireless frame, slot, and symbol. For example, the parameters shown in Figures 8A and 8B may be defined together. Also, as shown in Figures 8A and 8B, the DRX cycle and the start offset may be defined separately or together.

[0067] Figure 9 shows an example of a DRX cycle in units of radio frames, slots, and / or symbols. In the example shown in Figure 9, the DRX cycle is a combination of 1 radio frame, 6 slots, and 9 symbols. In this way, the DRX cycle, which is represented by a combination of the number of radio frames, the number of slots, and / or symbols, can be aligned with the non-integer period of XR traffic (e.g., 16.67 milliseconds, 8.33 milliseconds, etc.).

[0068] [DRX Onduration Start Timing] When using the parameters introduced and defined as described above, the DRX duration may be started at the following times:

[0069] (Alt1) DRX onduration may be started at a timing specified by the parameters. For example, terminal 200 may determine the start timing of DRX onduration based on drx-LongCycleStartOffsetFrame-rel18, drx-LongCycleStartOffsetSlot-rel18 and / or drx-LongCycleStartOffsetSymbol-rel18 shown in Figure 8B, and start DRX onduration at that start timing. In other words, terminal 200 may switch its state from inactive to active at a timing specified by the parameters.

[0070] (Alt2) DRX onduration may start from the earliest PDCCH monitoring after the timing specified by the parameter (Alt1). Such PDCCH monitoring timing may be, for example, CORESET (Control Resource Set) timing. For example, terminal 200 may start DRX onduration at the earliest CORESET timing after the timing based on drx-LongCycleStartOffsetFrame-rel18, drx-LongCycleStartOffsetSlot-rel18 and / or drx-LongCycleStartOffsetSymbol-rel18 shown in Figure 8B. In other words, terminal 200 may switch its state from inactive to active at the earliest control information monitoring timing after the timing specified by the parameter.

[0071] [Variations of Proposal 1] Other parameters related to DRX may also be defined / set / notified on a radio frame, slot and / or symbol basis. For example, some or all of the existing parameters drx-onDurationTimer, drx-InactivityTimer, drx-ShortCycle, drx-ShortCycleTimer, drx-HARQ-RTT-TimerDL, drx-HARQ-RTT-TimerUL, drx-RetransmissionTimerDL, drx-RetransmissionTimerUL, and / or newly introduced parameters may be defined / set / notified on a radio frame, slot and / or symbol basis.

[0072] The DRX cycle may be defined / set / notified in units of subframes, in addition to radio frames, slots, and / or symbols.

[0073] According to Proposal 1, base station 100 identifies the period of communication traffic to terminal 200. For example, base station 100 identifies that the period of communication traffic to terminal 200 is 16.67 milliseconds (non-integer period). Based on the non-integer period of communication traffic to terminal 200 (16.67 milliseconds), base station 100 determines a DRX cycle that includes the period (DRX onduration) during which terminal 200 is in an active state monitoring transmissions from base station 100. For example, base station 100 determines or sets the DRX cycle as a combination of the number of radio frames, the number of slots, and / or the number of symbols so that it is aligned (equal) with the non-integer period. Then, base station 100 transmits to terminal 200 DRX parameters (such as the determined number of radio frames, the number of slots, and / or the number of symbols) associated with the DRX cycle that takes a non-integer value and includes the active period of terminal 200.

[0074] Furthermore, according to Proposal 1, terminal 200 receives DRX parameters from base station 100 that are related to a DRX cycle, which takes a non-integer value and includes a period in which it is in an active state monitoring transmissions from base station 100. During the DRX cycle, terminal 200 switches its state between an active state and an inactive state in which it does not monitor transmissions from base station 100, based on the received DRX parameters.

[0075] As explained above, by aligning the traffic arrival period, which takes a non-integer value, with the terminal's DRX cycle, power saving for the terminal can be achieved in accordance with the characteristics of XR traffic. Furthermore, by defining / setting / notifying the DRX cycle on a wireless frame, slot, and / or symbol basis, the DRX cycle can be aligned with the symbol boundary. In addition, by aligning the traffic arrival period, which takes a non-integer value, with the terminal's DRX cycle, traffic delay can be suppressed.

[0076] <Proposal 2> Defining / setting / notifying DRX cycles using non-integer values ​​themselves The DRX cycle may be specified in the specifications by using non-integer values ​​such as 16.67 milliseconds and 8.33 milliseconds as they are. Alternatively, the DRX cycle may be set or notified to the terminal 200 by the base station 100 by using non-integer values ​​as they are. Non-integer DRX cycles may be set or notified using, for example, RRC signaling, MAC signaling (e.g., MAC CE) and / or DCI. Non-integer DRX cycles may also be referred to as DRX parameters or settings (information), parameters or settings (information) related to DRX, parameters or settings (information) related to power saving, parameters or settings (information) related to cycles including the active period, etc.

[0077] Figures 10A and 10B show examples of new parameters (information elements) for DRX that are introduced and defined for this purpose.

[0078] Figure 10A shows an information element that defines both integer and non-integer DRX cycles (and the start offset). The ms8.33 and ms16.67 shown represent 8.33 milliseconds and 16.67 milliseconds of DRX cycles, respectively. Note that while the name drx-LongCycleStartOffset-rel18 is shown as an example, the parameter names are not limited to this example.

[0079] Figure 10B shows the information element that defines non-integer DRX cycles (and start offsets). The ms8.33 and ms16.67 shown represent 8.33 milliseconds and 16.67 milliseconds of DRX cycles, respectively. Although the name drx-LongCycleStartOffset-rel18 is shown as an example, the parameter name is not limited to this example. In this example, the existing parameter drx-LongCycleStartOffset, which defines integer DRX cycles (and start offsets), may also be used.

[0080] Thus, integer-value DRX cycles and non-integer-value DRX cycles may be defined / configured / notified as common parameters (Figure 10A), or as separate parameters (Figure 10B). In this way, DRX cycles can be aligned with the non-integer period of XR traffic (e.g., 16.67 milliseconds, 8.33 milliseconds, etc.).

[0081] [DRX Onduration Start Timing] (Alt1) The DRX duration may be started at a timing specified by a parameter. For example, terminal 200 may determine the start timing of the DRX duration based on drx-LongCycleStartOffset-rel18 shown in Figures 10A and 10B, and start the DRX duration at that start timing. In other words, terminal 200 may switch its state from inactive to active at a timing specified by a parameter.

[0082] (Alt2) The DRX duration may start from the earliest PDCCH monitoring after the timing specified by the parameter (Alt1). Such a PDCCH monitoring timing may be, for example, the CORESET timing. For example, terminal 200 may start the DRX duration at the earliest CORESET timing after the timing based on drx-LongCycleStartOffset-rel18 shown in Figures 10A and 10B. In other words, terminal 200 may switch its state from inactive to active at the earliest control information monitoring timing after the timing specified by the parameter.

[0083] (Alt3) The DRX duration may be started at the earliest slot start timing after the timing specified by the parameter (Alt1). For example, terminal 200 may start the DRX duration at the earliest slot start timing after the timing based on drx-LongCycleStartOffset-rel18 shown in Figures 10A and 10B. In other words, terminal 200 may switch its state from inactive to active at the earliest slot start timing after the timing specified by the parameter.

[0084] (Alt4) The DRX duration may start at the earliest symbol start timing after the timing specified by the parameter (Alt1). For example, terminal 200 may start the DRX duration at the earliest symbol start timing after the timing based on drx-LongCycleStartOffset-rel18 shown in Figures 10A and 10B. In other words, terminal 200 may switch its state from inactive to active at the earliest symbol start timing after the timing specified by the parameter.

[0085] (Alt5) The DRX duration may be started at the nearest slot start timing prior to the timing specified by the parameter (Alt1). For example, terminal 200 may start the DRX duration at the nearest slot start timing prior to the timing based on drx-LongCycleStartOffset-rel18 shown in Figures 10A and 10B. In other words, terminal 200 may switch its state from inactive to active at the nearest slot start timing prior to the timing specified by the parameter.

[0086] (Alt6) The DRX duration may be started at the nearest symbol start timing prior to the timing specified by the parameter (Alt1). For example, terminal 200 may start its DRX duration at the nearest symbol start timing prior to the timing based on drx-LongCycleStartOffset-rel18 shown in Figures 10A and 10B. In other words, terminal 200 may switch its state from inactive to active at the nearest symbol start timing prior to the timing specified by the parameter.

[0087] Figure 11 shows an example of the start timing of DRX onduration. This example applies (Alt3) described above, and each rectangular block in the figure represents one slot. As shown in the figure, if the start of a DRX cycle (timing of (Alt1)) occurs in the middle of a slot, terminal 200 may start the DRX onduration at the earliest slot start timing after the start of the DRX cycle. The same applies to (Alt4) to (Alt6).

[0088] [Variations of Proposal 2] Other parameters related to DRX may also be defined / set / notified using non-integer values ​​as they are. For example, some or all of the existing parameters drx-onDurationTimer, drx-InactivityTimer, drx-ShortCycle, drx-ShortCycleTimer, drx-HARQ-RTT-TimerDL, drx-HARQ-RTT-TimerUL, drx-RetransmissionTimerDL, drx-RetransmissionTimerUL, and / or newly introduced parameters may be defined / set / notified using non-integer values ​​as they are. Furthermore, (Alt1) to (Alt6) above may also be applied similarly to the start timing of parameters (timers) to which non-integer values ​​may be applied as described above.

[0089] Figures 10A and 10B show examples of DRX cycles that are 8.33 milliseconds and 16.67 seconds, respectively, but other non-integer values ​​may be specified / set / notified.

[0090] In (Alt3) or (Alt5), DRX onduration is to be started at the earliest slot start timing after the timing specified by the parameter or the closest slot start timing before that timing. However, terminal 200 may determine which of the earliest slot start timing after that timing or the closest slot start timing before that timing is closer to that timing and start DRX onduration at the closer slot start timing. Similarly, in (Alt4) or (Alt6), DRX onduration is to be started at the earliest symbol start timing after the timing specified by the parameter or the closest symbol start timing before that timing. However, terminal 200 may determine which of the earliest symbol start timing after that timing or the closest symbol start timing before that timing is closer to that timing and start DRX onduration at the closer symbol start timing.

[0091] According to Proposal 2, base station 100 identifies the period of communication traffic to terminal 200. For example, base station 100 identifies that the period of communication traffic to terminal 200 is 16.67 milliseconds (non-integer period). Based on the non-integer period of communication traffic to terminal 200 (16.67 milliseconds), base station 100 determines a DRX cycle that includes the period (DRX duration) during which terminal 200 is in an active state monitoring transmissions from base station 100. For example, base station 100 determines or sets the DRX cycle as a non-integer value so that it is aligned with (equals) the non-integer period. Then, base station 100 transmits DRX parameters (such as the determined DRX cycle) related to the DRX cycle that takes a non-integer value and includes the active period of terminal 200 to terminal 200.

[0092] Furthermore, according to Proposal 2, terminal 200 receives DRX parameters from base station 100 that are related to a DRX cycle, which takes a non-integer value and includes a period in which it is in an active state monitoring transmissions from base station 100. During the DRX cycle, terminal 200 switches its state between an active state and an inactive state in which it does not monitor transmissions from base station 100, based on the received DRX parameters.

[0093] As explained above, by aligning the traffic arrival period, which takes a non-integer value, with the terminal's DRX cycle, power saving of the terminal can be achieved in accordance with the characteristics of XR traffic. Furthermore, by using a non-integer value as the DRX cycle, it is easy to align the traffic arrival period, which takes a non-integer value, with the terminal's DRX cycle. In addition, by aligning the traffic arrival period, which takes a non-integer value, with the terminal's DRX cycle, traffic delay can be suppressed.

[0094] <Proposal 3> Combination of different DRX cycles To ensure consistency with non-integer values ​​such as 16.67 milliseconds and 8.33 milliseconds, each set of multiple DRX cycles may include two different DRX cycles. Some or all of the number of sets of multiple DRX cycles, the base first DRX cycle included in the set of multiple DRX cycles (also called the base DRX cycle), the second DRX cycle included in the set of multiple DRX cycles (also called the additional DRX cycle), and the number of additional DRX cycles included in the set of multiple DRX cycles may be specified in the specification. For example, DRX cycles such as 16 milliseconds, 17 milliseconds, and 18 milliseconds, as described below, may be specified in the existing information element drx-LongCycleStartOffset as explained with reference to Figure 6, or they may be specified in a new information element (e.g., information element drx-LongCycleStartOffset-rel18). The above parameters, which may be specified in the specification, may be set or notified using, for example, RRC signaling, MAC signaling (e.g., MAC CE), and / or DCI. The above parameters, which may be specified in the specifications, may also be referred to as DRX parameters or settings (information), parameters or settings (information) related to DRX, parameters or settings (information) related to power saving, parameters or settings (information) related to cycles including the active period, etc.

[0095] Note that the base DRX cycle and the additional DRX cycle are different, so the start timing of the DRX cycles is also shifted accordingly. In other words, the start timing of the DRX cycles is shifted so that the end timing of one DRX cycle coincides with the start timing of the next DRX cycle.

[0096] [Additional DRX cycles: Default / configuration / notification] (Alt1) The value of the additional DRX cycle itself may be notified / set / notified. For example, a value such as 16 milliseconds may be notified / set / notified as the additional DRX cycle itself.

[0097] (Alt2) The increment / decrement (difference) of the base DRX cycle may be notified / set / notified. For example, if the base DRX cycle is 17 milliseconds, increment / decrement values ​​such as -1 millisecond (additional DRX cycle of 16 milliseconds) and +2 milliseconds (additional DRX cycle of 19 milliseconds) may be notified / set / notified.

[0098] Figures 12A to 12C show examples of different DRX cycle combinations. Figure 12A shows an example where the number of multiple DRX cycles is 3, the additional DRX cycles included in the multiple DRX cycles are 16 milliseconds, and the number of additional DRX cycles included in the multiple DRX cycles is 1 (and the base DRX cycle is 17 milliseconds). In the example shown in Figure 12A, the total of the multiple DRX cycles is 50 (=17+17+16) milliseconds, which is three times the period of XR traffic, for example, 16.67 milliseconds. Therefore, it can be understood that the multiple DRX cycles are aligned with such a non-integer period. Figure 12B shows an example where the number of multiple DRX cycles is 3, the additional DRX cycles included in the multiple DRX cycles are 18 milliseconds, and the number of additional DRX cycles included in the multiple DRX cycles is 1 (and the base DRX cycle is 16 milliseconds). In the example shown in Figure 12B, the sum of multiple DRX cycles is 50 (=16+16+18) milliseconds, which is three times the period of XR traffic, for example, 16.67 milliseconds. Therefore, it can be interpreted that multiple DRX cycles are aligned with such a non-integer period. Figure 12C shows an example where there are 6 multiple DRX cycles, the additional DRX cycles included in the multiple DRX cycles are 16 milliseconds, and the number of additional DRX cycles included in the multiple DRX cycles is 2 (and the base DRX cycle is 17 milliseconds). In the example shown in Figure 12C, the sum of multiple DRX cycles is 100 (=17+17+17+17+16+16) milliseconds, which is six times the period of XR traffic, for example, 16.67 milliseconds. Therefore, it can be interpreted that multiple DRX cycles are aligned with such a non-integer period.

[0099] [Location of additional DRX cycles in multiple DRX cycles] (Alt1) The additional DRX cycle may be the last one or more DRX cycles in a series of DRX cycles, as shown in Figures 12A to 12C. In other words, the additional DRX cycle may be fixed as the last one or more DRX cycles in a series of DRX cycles.

[0100] (Alt2) An additional DRX cycle may be one or more DRX cycles from the beginning of a multi-cycle DRX sequence. In other words, an additional DRX cycle may be fixed as the first one or more DRX cycles in a multi-cycle DRX sequence.

[0101] (Alt3) The location of additional DRX cycles may be specified in the specifications, indicating which of multiple DRX cycles the first additional DRX cycle is, and this may be set or notified to terminal 200 by base station 100, for example, using RRC signaling, MAC signaling (e.g., MAC CE) and / or DCI.

[0102] [Start offset in additional DRX cycles] (Alt1) The start offset in the base DRX cycle may be used as the start offset in the additional DRX cycle. In this case, the start offset in the additional DRX cycle does not need to be notified to terminal 200.

[0103] (Alt2) The start offset in an additional DRX cycle may be calculated by terminal 200 based on the start offset in the base DRX cycle and the increase / decrease value of the additional DRX cycle relative to the base DRX cycle. Specifically, terminal 200 may set the start offset in an additional DRX cycle to the sum of the start offset in the base DRX cycle and the increase / decrease value of the additional DRX cycle relative to the base DRX cycle. In this case, the start offset in an additional DRX cycle does not need to be notified to terminal 200.

[0104] (Alt3) The start offset in an additional DRX cycle may be specified in the specifications and may be set or notified to the terminal 200 by the base station 100, for example, using RRC signaling, MAC signaling (e.g., MAC CE) and / or DCI.

[0105] [Variations of Proposal 3] Other parameters related to DRX may also be defined / configured / notified in a manner that includes two values ​​for each set of multiple values. For example, some or all of the existing parameters drx-onDurationTimer, drx-InactivityTimer, drx-ShortCycle, drx-ShortCycleTimer, drx-HARQ-RTT-TimerDL, drx-HARQ-RTT-TimerUL, drx-RetransmissionTimerDL, drx-RetransmissionTimerUL, and / or newly introduced parameters may be defined / configured / notified in a manner that includes two values ​​for each set of multiple values.

[0106] The specification may define the correspondence between the number of DRX cycles in multiple DRX cycles, the number of additional DRX cycles included in multiple DRX cycles, and the number of additional DRX cycles included in multiple DRX cycles, and an index or identification information (ID) that indicates the combination. Furthermore, the above index or ID may be set or notified to the terminal 200 by the base station 100, for example, using RRC signaling, MAC signaling (e.g., MAC CE) and / or DCI. The above index or ID may be referred to as DRX parameters or settings (information), parameters or settings (information) related to DRX, parameters or settings (information) related to power saving, parameters or settings (information) related to cycles including the active period, etc.

[0107] The specification may specify the number of base DRX cycles (included in multiple DRX cycles) rather than the total number of multiple DRX cycles, and this may be set or notified to the terminal 200 by the base station 100, for example, using RRC signaling, MAC signaling (e.g., MAC CE), and / or DCI. Furthermore, the specification may specify the correspondence between the number of base DRX cycles (included in multiple DRX cycles), additional DRX cycles (included in multiple DRX cycles), and the number of additional DRX cycles (included in multiple DRX cycles), and an index or ID indicating that combination. In addition, the above index or ID may be set or notified to the terminal 200 by the base station 100, for example, using RRC signaling, MAC signaling (e.g., MAC CE), and / or DCI. The above-mentioned number of base DRX cycles and the above-mentioned index or ID may also be referred to as DRX parameters or settings (information), parameters or settings (information) related to DRX, parameters or settings (information) related to power saving, parameters or settings (information) related to cycles including the active period, etc.

[0108] Three or more different DRX cycles may be combined so that they match non-integer values ​​such as 16.67 milliseconds and 8.33 milliseconds. In this case as well, two or more additional DRX cycles other than the base DRX cycle included in the multiple DRX cycles, and the number of times they occur, may be specified / configured / notified. Similarly, the correspondence between the number of times the multiple DRX cycles (or the number of times the base DRX cycle), the combination of two or more additional DRX cycles and their numbers, and an index or ID indicating the combination may be specified in the specification. Similarly, the index or ID may be set or notified to the terminal 200 by the base station 100, for example, using RRC signaling, MAC signaling (e.g., MAC CE) and / or DCI. The two or more additional DRX cycles, their numbers, and the index or ID may be referred to as DRX parameters or settings (information), parameters or settings (information) related to DRX, parameters or settings (information) related to power saving, parameters or settings (information) related to cycles including the active period, etc.

[0109] According to Proposal 3, the base station 100 identifies the period of communication traffic to the terminal 200. For example, the base station 100 identifies that the period of communication traffic to the terminal 200 is 16.67 milliseconds (non-integer period). Based on the non-integer period of communication traffic to the terminal 200 (16.67 milliseconds), the base station 100 determines the first DRX cycle and the second DRX cycle, which include the period (DRX onduration) during which the terminal 200 is in an active state monitoring transmissions from the base station 100. For example, the base station 100 determines or sets the first DRX cycle (17 milliseconds), the number of DRX cycles in multiple DRX cycles (3), the second DRX cycle (16 milliseconds), and the number of DRX cycles in multiple DRX cycles (1). In this way, multiple DRX cycles and non-integer periods are aligned. The first DRX cycle may be pre-set as the base DRX cycle. The base station 100 then transmits DRX parameters (such as the number of multiple DRX cycles) related to the first and second DRX cycles, which take integer values ​​and include the active period of the terminal 200, to the terminal 200.

[0110] Furthermore, according to Proposal 3, terminal 200 receives parameters from base station 100 related to a first DRX cycle taking a first integer value and a second DRX cycle taking a second integer value, which include a period in an active state where it monitors transmissions from base station 100. Here, the sum of n times the first integer value (e.g., 17 (milliseconds)) (where n is a predetermined integer from among integers greater than or equal to 1; e.g., n=2) and m times the second integer value (e.g., 16 (milliseconds)) (where m is a predetermined integer from among integers greater than or equal to 1; e.g., m=1) is equal to k times a predetermined non-integer value (e.g., 16.67 (milliseconds)) (where k is a predetermined integer from among integers greater than or equal to 2; e.g., k=3). Then, during the first and second DRX cycles, terminal 200 switches its state between an active state and an inactive state where it does not monitor transmissions from base station 100, based on the received DRX parameters.

[0111] As explained above, by aligning the traffic arrival period, which takes a non-integer value, with the terminal's (multiple) DRX cycles, power saving of the terminal can be achieved in accordance with the characteristics of XR traffic. Furthermore, by aligning the traffic arrival period, which takes a non-integer value, with the terminal's DRX cycle, traffic delay can be suppressed. In addition, by using an integer value as the DRX cycle, power saving can be achieved with simple control.

[0112] <Modified example of the embodiment> Which of the items described as options in Proposals 1 to 3 above (e.g., AltX) or the items described as options below are supported may depend on settings by RRC, instructions by MAC CE or UCI, or terminal capabilities.

[0113] (Device configuration) Next, we will describe an example of the functional configuration of the base station 100 and terminal 200 that perform the processes and operations described above. The base station 100 and terminal 200 may have functions to implement the embodiments described above. However, the base station 100 and terminal 200 may each have only some of the functions in the embodiments.

[0114] <Base station> Figure 13 is a block diagram showing an example of the configuration of a base station 100 according to one embodiment of the present disclosure. The base station includes, for example, a transmitting unit 101, a receiving unit 102, and a control unit 103. The base station 100 communicates wirelessly with a terminal 200 (see Figure 14). The transmitting unit 101 and the receiving unit 102 may collectively be referred to as the communication unit.

[0115] The transmitting unit 101 transmits a DL signal to the terminal 200. For example, the transmitting unit 101 transmits the DL signal under the control of the control unit 103. For example, the DL signal may include information indicating the scheduling of signal transmission at the terminal 200 (e.g., UL grant), upper-layer control information, etc.

[0116] For example, the transmitting unit 101 transmits various control signals (such as control signals for the RRC layer), reference signals, data signals, etc., to the terminal 200 as DL signals. The transmitting unit 101 transmits various signals, channels, setting information, control information, etc., as described in the above embodiment, to the terminal 200 as DL signals.

[0117] For example, the transmitting unit 101 transmits DRX parameters (number of wireless frames, number of slots, number of symbols, DRX cycles including base DRX cycles and additional DRX cycles (non-integer values, integer values), number of additional DRX cycles, etc.) generated (determined, set) by the control unit 103 to the terminal 200.

[0118] The receiving unit 102 receives the UL signal transmitted from the terminal 200. For example, the receiving unit 102 receives the UL signal under the control of the control unit 103.

[0119] For example, the receiving unit 102 receives signals from the terminal 200 as UL signals, including terminal capability information (e.g., UE capability), various control signals, reference signals, data signals, etc.

[0120] The control unit 103 controls the overall (communication) operation of the base station 100, including the transmission process in the transmission unit 101 and the reception process in the reception unit 102.

[0121] For example, the control unit 103 acquires information such as data and control information from the upper layer and outputs it to the transmission unit 101. The control unit 103 also outputs the data and control information received from the reception unit 102 to the upper layer.

[0122] For example, the control unit 103 allocates resources used for transmitting and receiving DL signals and / or UL signals based on signals received from terminal 200 (e.g., data and control information, etc.) and / or data and control information, etc. acquired from higher layers. Information regarding the allocated resources may be included in the control information transmitted to terminal 200.

[0123] The control unit 103 performs operations other than transmission and reception as described in the above embodiment (these operations may also be performed by the transmission unit 101 and / or the reception unit 102).

[0124] For example, the control unit 103 identifies the period of communication traffic to the terminal 200. Also, for example, the control unit 103 generates (determines, sets) DRX parameters.

[0125] <Terminal> Figure 14 is a block diagram showing an example of the configuration of a terminal 200 according to one embodiment of the present disclosure. The terminal 200 includes, for example, a receiving unit 201, a transmitting unit 202, and a control unit 203. The terminal 200 communicates wirelessly with, for example, a base station 100 (see Figure 13). The receiving unit 201 and the transmitting unit 202 may collectively be referred to as the communication unit.

[0126] The receiving unit 201 receives DL signals transmitted from the base station 100. For example, the receiving unit 201 receives DL signals under the control of the control unit 203.

[0127] For example, the receiving unit 201 receives various control signals, reference signals, data signals, etc. from the base station 100 as DL signals. The receiving unit 201 receives various signals, channels, setting information, control information, etc., as described in the above embodiment, from the base station 100 as DL signals.

[0128] For example, the receiving unit 201 receives DRX parameters from the base station 100 (parameters related to (DRX) cycles that take non-integer values, including the period in which it is in an active state monitoring transmissions from the base station 100; parameters related to the first (DRX) cycle that takes a first integer value, including the period in which it is in an active state monitoring transmissions from the base station 100; and parameters related to the second (DRX) cycle that takes a second integer value, including the period in which it is in an active state monitoring transmissions from the base station 100). For example, the receiving unit 201 receives cycles that take non-integer values ​​in units of radio frames, slots, and / or symbols. For example, the receiving unit 201 receives cycles that take non-integer values ​​as non-integer values ​​from the base station 100. When the receiving unit 201 receives the first cycle that takes a first integer value and the second cycle that takes a second integer value, the sum of n times the first integer value (where n is a predetermined integer from among integers of 1 or more) and m times the second integer value (where m is a predetermined integer from among integers of 1 or more) is equal to k times a predetermined non-integer value (where k is a predetermined integer from among integers of 2 or more).

[0129] The transmitting unit 202 transmits the UL signal to the base station 100. For example, the transmitting unit 202 transmits the UL signal under the control of the control unit 203.

[0130] For example, the transmitting unit 202 transmits signals containing information about the processing capabilities of the terminal 200, various control signals, reference signals, data signals, etc., as UL signals to the base station 100.

[0131] The control unit 203 controls the overall (communication) operation of the terminal 200, including the receiving process in the receiving unit 201 and the transmission process in the transmitting unit 202.

[0132] For example, the control unit 203 acquires information such as data and control information from the upper layer and outputs it to the transmission unit 202. The control unit 203 also outputs data and control information received from the receiving unit 201 to the upper layer.

[0133] For example, the control unit 203 controls the transmission of information to be fed back to the base station 100. The information to be fed back to the base station 100 may include, for example, a HARQ-ACK, channel status information (CSI), or scheduling request (SR). The information to be fed back to the base station 100 may be included in the UCI. The UCI is transmitted using the PUCCH or PUSCH resource.

[0134] The control unit 203 performs operations other than the transmission and reception described in the above embodiment (these operations may also be performed by the receiving unit 201 and / or the transmitting unit 202).

[0135] For example, during the above cycle, or between the first and second cycles, the control unit 203 switches the state of the terminal 200 between an active state, which monitors transmissions from the base station 100, and an inactive state, which does not monitor transmissions from the base station 100, based on the DRX parameters transmitted from the base station 100.

[0136] For example, the control unit 203 switches the state of the terminal 200 from an inactive state to an active state at the earliest control information monitoring timing after the timing specified by the DRX parameter.

[0137] Furthermore, the channels used for transmitting DL signals and UL signals are not limited to the examples described above. For example, the channels used for transmitting DL signals and UL signals may include RACH and PBCH as described above.

[0138] This concludes the explanation of this disclosure. The division of items in the above explanation is not essential to this disclosure, and matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other).

[0139] <Hardware configuration, etc.> The block diagrams used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may also be realized by combining the above one device or the above multiple devices with software.

[0140] Functions include, but are not limited to, judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. As mentioned above, the method of implementation is not particularly limited.

[0141] For example, a base station, user terminal, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 15 is a diagram showing an example of the hardware configuration of a base station 100 and a terminal 200 according to one embodiment of the present disclosure. The above-mentioned base station 100 and terminal 200 may be physically configured as a computer device including a processor 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0142] In the following explanation, the term "device" can be interpreted as a circuit, device, unit, etc. The hardware configuration of the base station 100 and terminal 200 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0143] Each function in the base station 100 and terminal 200 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002, which allows the processor 1001 to perform calculations and control communication by the communication device 1004, or control at least one of reading and writing data in the memory 1002 and storage 1003.

[0144] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control units, arithmetic units, registers, etc. For example, the control units 103 and 203 described above may be implemented by the processor 1001.

[0145] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes accordingly. The program used is one that causes the computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 103 of the base station 100 and the control unit 203 of the terminal 200 may be implemented by control programs stored in the memory 1002 and running on the processor 1001, and other functional blocks may be implemented similarly. The above-described various processes have been explained as being executed by one processor 1001, but they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may also be transmitted from the network via a telecommunications line.

[0146] Memory 1002 is a computer-readable recording medium and may consist of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. Memory 1002 may also be called a register, cache, main memory, etc. Memory 1002 can store executable programs (program code), software modules, etc., for carrying out a wireless communication method according to one embodiment of the present disclosure.

[0147] Storage 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disc, a digital multipurpose disc, a Blu-ray® disc), a smart card, flash memory (e.g., a card, a stick, a key drive), a floppy® disk, a magnetic strip, etc. Storage 1003 may also be called an auxiliary storage device. The above-mentioned storage medium may be, for example, a database, server, or other suitable medium including at least one of memory 1002 and storage 1003.

[0148] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may be configured to include high-frequency switches, duplexers, filters, frequency synthesizers, etc., in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitting unit 101, receiving unit 102, receiving unit 201 and transmitting unit 202 may be implemented by the communication device 1004. The communication device 1004 may be implemented with physically or logically separated transmitting and receiving units.

[0149] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0150] Furthermore, each device, such as the processor 1001 and memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0151] Furthermore, the base station 100 and terminal 200 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0152] (Summary of the embodiments) According to embodiments of the present disclosure, a terminal is provided comprising: a receiving unit that receives from a base station parameters related to a cycle that takes a non-integer value and includes a period in which it is in an active state that monitors transmissions from the base station; and a control unit that switches the state of the terminal between the active state and an inactive state in which it does not monitor transmissions from the base station based on the parameters during the cycle.

[0153] With the above configuration, by aligning the cycle including the active state with the non-integer period of XR traffic, it is possible to conserve power on the terminal by taking into account the characteristics of XR traffic (e.g., period), and to suppress delays in XR traffic.

[0154] In this terminal, the receiving unit receives cycles that take the non-integer value in units of wireless frames, slots, and / or symbols from the base station.

[0155] The above configuration allows the cycle, including the period in the active state, to be aligned with the symbol boundary.

[0156] In this terminal, the receiving unit receives cycles that take the non-integer value from the base station as the non-integer value.

[0157] The above configuration makes it easy to align the cycle, which includes the period of active state, with the non-integer period of XR traffic.

[0158] In this terminal, the control unit switches the state of the terminal from the inactive state to the active state at the earliest control information monitoring timing after the timing specified by the parameter.

[0159] With the above configuration, control information can be received efficiently.

[0160] According to embodiments of the present disclosure, a terminal is provided comprising: a receiving unit that receives parameters from a base station relating to a first cycle taking a first integer value and a second cycle taking a second integer value, including a period in an active state that monitors transmissions from the base station; and a control unit that switches the state of the terminal between the active state and an inactive state that does not monitor transmissions from the base station based on the parameters during the first and second cycles, wherein the sum of n times the first integer value (where n is a predetermined integer from among integers of 1 or more) and m times the second integer value (where m is a predetermined integer from among integers of 1 or more) is equal to k times a predetermined non-integer value (where k is a predetermined integer from among integers of 2 or more).

[0161] With the above configuration, by aligning the cycle including the active state period with the non-integer period of XR traffic, it is possible to conserve power to the terminal by considering the characteristics of XR traffic (e.g., period), and suppress delays in XR traffic. Furthermore, by using an integer value as the DRX cycle, power conservation to the terminal can be achieved with simple control.

[0162] According to embodiments of the present disclosure, a communication method is provided which includes receiving from a base station parameters related to a cycle that takes a non-integer value and includes a period in which the terminal is in an active state monitoring transmissions from the base station, and during the cycle, switching the state of the terminal between the active state and an inactive state in which it does not monitor transmissions from the base station based on the parameters.

[0163] With the above configuration, by aligning the cycle including the active state with the non-integer period of XR traffic, it is possible to conserve power on the terminal by taking into account the characteristics of XR traffic (e.g., period), and to suppress delays in XR traffic.

[0164] (Supplement to the embodiment) While embodiments of this disclosure 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, substitutions, etc. Specific numerical examples have been used to facilitate understanding of the invention, but 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 this disclosure, and matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operation of multiple functional units may be physically performed by one part, or the operation of one functional unit may be physically performed by multiple parts. The processing procedures described in the embodiments may be rearranged as long as they do not contradict each other. For the convenience of explaining the processing, the base station 100 and terminal 200 have been described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 100 in accordance with the embodiments of this disclosure and the software operated by the processor of the terminal 200 in accordance with the embodiments of this disclosure 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.

[0165] <Information notification, signaling> Information notification is not limited to the embodiments described herein and may be carried out by other means. For example, information notification may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or combinations thereof. RRC signaling may also be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0166] <Applicable Systems> Each aspect / embodiment described in this disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (where x is, for example, an integer or decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), and IEEE This may apply to at least one system utilizing 802.20, UWB (Ultra-WideBand), Bluetooth®, or other appropriate systems, and to next-generation systems extended, modified, created, or defined based thereon. It may also apply to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G).

[0167] <Processing Procedures, etc.> The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0168] <Base station operation> The specific operations described in this disclosure as being performed by a base station may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal can be performed by the base station and at least one other network node (for example, an MME or S-GW, but not limited to these). Although the above example illustrates a case where there is one other network node besides the base station, it may also be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0169] <Input / Output Direction> Information, etc. (see the section on <Information, Signals>) can be output from a higher layer (or lower layer) to a lower layer (or higher layer). Input and output may also occur via multiple network nodes.

[0170] <Handling of input / output information, etc.> Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0171] <Judgment method> The determination may be made by a value represented by 1 bit (0 or 1), by a boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0172] <Variations in form, etc.> Each aspect / embodiment described herein may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0173] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way.

[0174] <Software> Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0175] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0176] <Information, Signals> The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0177] In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0178] <Systems, Networks> The terms “system” and “network” as used in this disclosure are interchangeable.

[0179] <Parameters, channel name> Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0180] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0181] <Base station> In this disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0182] A base station can accommodate one or more (e.g., three) cells. If a base station accommodates multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a Remote Radio Head (RRH)). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0183] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform information-based control or operation.

[0184] <Mobile Station> In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0185] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or several other appropriate terms.

[0186] <Base station / mobile station> At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to a movable object, and its speed of movement is arbitrary. This also includes the case when the mobile body is stationary. The mobile body includes, but is not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and items mounted on them. The mobile body may also be a mobile body that moves autonomously based on operation commands. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station may include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0187] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, the terminal 200 may have the functions that the base station 100 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc., may be interpreted as side channel.

[0188] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station 100 may be configured to have the same functions as the terminal 200 described above.

[0189] Figure 16 shows an example of the configuration of vehicle 2001. As shown in Figure 16, vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, to the communication module 2013.

[0190] The drive unit 2002 consists of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel, which is operated by the user.

[0191] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2029 installed in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0192] Signals from various sensors 2021-2029 include current signals from the current sensor 2021 which senses the motor current, front and rear wheel rotation speed signals obtained by the rotation speed sensor 2022, front and rear wheel air pressure signals obtained by the air pressure sensor 2023, vehicle speed signals obtained by the vehicle speed sensor 2024, acceleration signals obtained by the acceleration sensor 2025, accelerator pedal depression signals obtained by the accelerator pedal sensor 2029, brake pedal depression signals obtained by the brake pedal sensor 2026, shift lever operation signals obtained by the shift lever sensor 2027, and detection signals obtained by the object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0193] The Information Services Unit 2012 consists of various devices for providing (outputting) various types of information such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Services Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.

[0194] Information Services Section 2012 may include input devices that accept input from external sources (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) and output devices that perform output to external sources (e.g., displays, speakers, LED lamps, touch panels, etc.).

[0195] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also sends and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0196] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via its communication port. For example, the communication module 2013 sends and receives data via its communication port 2033 to the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021-2029 provided in the vehicle 2001.

[0197] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station or a mobile station.

[0198] The communication module 2013 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 2021 to 2029 input to the electronic control unit 2010, information obtained based on said signals, and information based on input from an external source (user) obtained via the information service unit 2012. The electronic control unit 2010, the various sensors 2021 to 2029, the information service unit 2012, etc., may also be called input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above input.

[0199] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be called an output unit, which outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from the external device in memory 2032, which is available to the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc., provided in the vehicle 2001.

[0200] <Meaning and interpretation of terms> As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in a table, database, or other data structure), and ascertaining. “Determining” may also include, for example, receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0201] The terms “connected,” “coupled,” or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be reinterpreted as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0202] <Reference signal> The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applicable standard.

[0203] <Meaning of "based on"> In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0204] <"First," "Second"> Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, references to the first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

[0205] <Means> In the configuration of each of the above devices, "means" may be replaced with "unit", "circuit", "device", or the like.

[0206] <Open format> In the present disclosure, when "include", "including" and variations thereof are used, these terms are intended to be inclusive in the same manner as the term "comprising". Furthermore, the term "or" as used in the present disclosure is not intended to be an exclusive OR.

[0207] <Time units such as TTI, frequency units such as RB, and radio frame configuration> A radio frame may be configured by one or more frames in the time domain. Each of the one or more frames in the time domain may be referred to as a subframe. A subframe may be further configured by one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that does not depend on numerology.

[0208] Numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. For example, numerology may indicate at least one of subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), the number of symbols per TTI, radio frame configuration, specific filtering processing performed by a transceiver in the frequency domain, and specific windowing processing performed by a transceiver in the time domain.

[0209] A slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A slot may also be a time unit based on neurology.

[0210] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0211] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Different names may be used for each of these terms.

[0212] For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0213] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each user terminal to allocate wireless resources (such as the frequency bandwidth and transmission power available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0214] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0215] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0216] A TTI with a time length of 1ms may also be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may also be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0217] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0218] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0219] Furthermore, the time domain of RB may contain one or more symbols and may be the length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc., may each consist of one or more resource blocks.

[0220] One or more RBs may also be called a Physical RB (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0221] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0222] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a given neurology in a given carrier. Here, the common RBs may be identified by an index of the RBs relative to the carrier's common reference point. A PRB may be defined and numbered within a BWP.

[0223] A BWP may include BWPs for UL (UL BWP) and BWPs for DL ​​(DL BWP). One or more BWPs may be configured within a single carrier for a UE.

[0224] At least one of the configured BWPs may be active, and the UE does not need to assume that it will send or receive a given signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0225] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0226] <Maximum transmission power> The term "maximum transmit power" as used in this disclosure may mean the maximum value of the transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0227] <article> In this disclosure, if articles are added by translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0228] <"Different"> In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different." [Industrial applicability]

[0229] This disclosure is useful for wireless communication systems. [Explanation of Symbols]

[0230] 10 Wireless communication systems 20 NG-RAN 100 base stations (gNB) 200 terminals (UE) 101,202 Transmitter 102,201 Receiving Unit 103,203 Control Unit 1001 Processor 1002 memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus

Claims

1. A receiving unit receives from the base station a parameter indicating a DRX cycle, which includes a period in which it is in an active state monitoring transmissions from the base station, and is an interval in which the start timing of the active state is repeated, and whose length is a non-integer value. A control unit that switches the state of its own terminal between the active state and an inactive state that does not monitor transmissions from the base station, based on the DRX cycle indicated by the aforementioned parameters, A terminal equipped with the following features.

2. The receiving unit receives the parameters indicating the DRX cycle in units of wireless frames, slots, and / or symbols from the base station. The terminal according to claim 1.

3. The receiving unit receives the parameter indicating the DRX cycle as a non-integer value from the base station. The terminal according to claim 1.

4. The control unit switches the state of the terminal from the inactive state to the active state at the earliest control information monitoring timing after the timing specified by the parameter. The terminal according to claim 1.

5. A receiving unit that receives parameters from the base station, including a period in an active state that monitors transmissions from the base station, relating to a first DRX cycle that takes a first integer value and a second DRX cycle that takes a second integer value, A control unit that, during the first DRX cycle and the second DRX cycle, switches the state of its own terminal between the active state and an inactive state that does not monitor transmissions from the base station, based on the parameters, Equipped with, The sum of n times the first integer value (where n is a predetermined integer from among integers of 1 or more) and m times the second integer value (where m is a predetermined integer from among integers of 1 or more) is equal to k times a predetermined non-integer value (where k is a predetermined integer from among integers of 2 or more), The control unit switches the state of its own terminal using the first DRX cycle and the second DRX cycle, such that every n + m DRX cycles includes n first DRX cycles and m second DRX cycles. Terminal.

6. The device, A parameter indicating a DRX cycle, which includes a period of being in an active state monitoring transmissions from the base station, and is an interval in which the start timing of the active state is repeated, and whose length is a non-integer value, is received from the base station. Based on the DRX cycle indicated by the aforementioned parameters, the state of the terminal is switched between the active state and an inactive state in which it does not monitor transmissions from the base station. Communication method.

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