Terminal and communication method

Abstract

A terminal according to an aspect of the present disclosure comprises: a control section which sets a parameter relating to a scheduling request including an instruction to activate or put to sleep a reception unit for a base station to receive a signal; and a transmission section which transmits the scheduling request to the base station according to the parameter.

Description

[Technical Field]

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

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

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

[0004] Regarding power saving, 3GPP Release 16 introduces WUS (Wake Up Signal) to enable terminals to monitor control signals with low power consumption. Note that power may be interpreted as energy, and power saving may be interpreted as power reduction, etc.

[0005] 3GPP Release 18 is studying power saving for base stations (for example, Non-Patent Document 2). Details are a topic for future study. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] 3GPP TS 38.300 V17.0.0 (2022-03) [Non-patent document 2] “New SI: Study on network energy savings for NR”, RP-213554, 3GPP TSG RAN Meeting #94e, 3GPP, December 2021 Summary of the Invention

[0007] As described above, power saving of base stations is being considered for future wireless communication systems, but the question of how to control this power saving is an issue. However, the specific operations and the like related to such control have not been fully considered.

[0008] One aspect of the present disclosure provides a terminal and a communication method that can save power in a base station.

[0009] A terminal according to one aspect of the present disclosure includes a control unit that sets parameters related to a scheduling request, including instructions for a base station to start or put to sleep a receiving unit for receiving a signal, and a transmitting unit that transmits the scheduling request to the base station in accordance with the parameters.

[0010] A communication method according to one aspect of the present disclosure includes a terminal setting parameters related to a scheduling request including instructions for a base station to wake up or sleep a receiving unit for receiving a signal, and transmitting the scheduling request to the base station according to the parameters. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating an example of a wireless communication system according to an embodiment of the present disclosure. [Figure 2] FIG. 1 is a diagram illustrating an example of a frequency range used in a wireless communication system according to an embodiment of the present disclosure. [Figure 3] 1A to 1C are diagrams illustrating exemplary configurations of radio frames, subframes, and slots used in a radio communication system according to an embodiment of the present disclosure. [Figure 4]FIG. 1 is a diagram illustrating CDRX in 3GPP Release 15. [Figure 5] FIG. 1 is a diagram illustrating WUS in Release 16 of 3GPP. [Figure 6] FIG. 10 is a diagram illustrating an example of a base station activation signal according to an embodiment of the present disclosure. [Figure 7] FIG. 2 is a sequence diagram illustrating an example of an operation of a wireless communication system according to an embodiment of the present disclosure. [Figure 8] FIG. 2 is a block diagram illustrating an example of a configuration of a base station according to an embodiment of the present disclosure. [Figure 9] FIG. 2 is a block diagram illustrating an example of a configuration of a terminal according to an embodiment of the present disclosure. [Figure 10] FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. [Figure 11] 1 is a diagram illustrating an example of a configuration of a vehicle according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment according to one aspect of the present disclosure will be described with reference to the drawings.

[0013] (Embodiment) <Wireless communication system> 1 is a diagram illustrating an example of a wireless communication system 10 according to an embodiment of the present disclosure. The wireless communication system 10 is a wireless communication system conforming to 5G NR, and includes a Next Generation-Radio Access Network 20 (hereinafter, referred to as NG-RAN 20) and a terminal 200 (hereinafter, also referred to as UE (User Equipment) 200).

[0014] The wireless communication system 10 may be a wireless communication system conforming to a system called Beyond 5G, 5G Evolution, or 6G.

[0015] The NG-RAN 20 includes a base station 100A (hereinafter also referred to as gNB 100A) and a base station 100B (hereinafter also referred to as gNB 100B). When it is not necessary to distinguish between the gNB 100A, the gNB 100B, etc., they are collectively referred to as gNBs or base stations 100. Furthermore, the number of gNBs and UEs is not limited to the example shown in FIG. 1.

[0016] The NG-RAN 20 actually includes multiple NG-RAN nodes, specifically, gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). Note that the NG-RAN 20 and 5GC may simply be referred to as a "network." In the following description, the term "gNB" may be replaced with the term "network (NW)."

[0017] As an example, the gNB100A and the gNB100B are base stations conforming to 5G, and perform 5G wireless communication with the UE 200. The gNB100A, the gNB100B, and the UE 200 may support MIMO (Multiple-Input Multiple-Output), which generates a more directional beam BM by controlling radio signals transmitted from multiple antenna elements, carrier aggregation (CA), which uses a bundle of multiple component carriers (CC), and dual connectivity (DC), which performs communication between the UE and each of two NG-RAN nodes.

[0018] Furthermore, the wireless communication system 10 may support multiple frequency ranges (FR). Fig. 2 is a diagram showing an example of FRs used in the wireless communication system 10. As shown in Fig. 2, the wireless communication system 10 may support FR1 and FR2. The frequency bands of each FR are, for example, as follows: FR1: 410MHz~7.125GHz FR2: 24.25GHz~52.6GHz

[0019] FR1 may use a sub-carrier spacing (SCS) of 15 kHz, 30 kHz, or 60 kHz, and a bandwidth (BW) of 5 to 100 MHz. FR2 is a higher frequency than FR1, and may use an SCS of 60 kHz or 120 kHz (including 240 kHz), and a bandwidth (BW) of 50 to 400 MHz.

[0020] Note that the SCS may be interpreted as a numerology, which is defined in 3GPP TS 38.300 and corresponds to one subcarrier spacing in the frequency domain.

[0021] Furthermore, the wireless communication system 10 may support a frequency band higher than the FR2 frequency band. Specifically, the wireless communication system 10 may support a frequency band exceeding 52.6 GHz up to 114.25 GHz. For convenience, such a high frequency band may be referred to as "FR2x." When using a frequency band exceeding 52.6 GHz, 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.

[0022] Fig. 3 is a diagram showing an example of the configuration of a radio frame (system frame), subframe, and slot used in the radio communication system 10. As shown in Fig. 3, one slot is made up of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). However, the SCS is not limited to the interval (frequency) shown in Fig. 3. For example, 480 kHz, 960 kHz, etc. may be used as the SCS.

[0023] Furthermore, the number of symbols constituting one slot does not necessarily have to be 14 (for example, it may be 28 or 56 symbols, etc.) Furthermore, the number of slots per subframe may differ depending on the SCS.

[0024] The time direction (t) shown in Fig. 3 may be called a time domain, a symbol period, a symbol time, etc. The frequency direction may be called a frequency domain, a resource block, a subcarrier, a bandwidth part (BWP), etc.

[0025] The gNB100 transmits control information, setting information, etc. to the UE200 as a downlink (DL) signal to achieve power saving of the gNB100.

[0026] Furthermore, for example, gNB100 receives control information for achieving power saving of gNB100, data signals, information regarding the processing capabilities of UE200 (terminal capabilities (information); for example, UE capability), etc. from UE200 as uplink (UL) signals.

[0027] Channels used for transmitting DL signals include, for example, data channels and control channels. For example, the data channel may include a physical downlink shared channel (PDSCH), and the control channel may include a physical downlink control channel (PDCCH). For example, the gNB 100 transmits control information to the UE 200 using the PDCCH, and transmits DL data signals using the PDSCH. Note that the PDSCH is an example of a downlink shared channel, and the PDCCH is an example of a downlink control channel. Note that the PDCCH may be interpreted as downlink control information (DCI), control information, etc. transmitted in the PDCCH.

[0028] The reference signal included in the DL signal may include, for example, at least one of a DMRS (Demodulation Reference Signal), a PTRS (Phase Tracking Reference Signal), a CSI-RS (Channel State Information - Reference Signal), an SRS (Sounding Reference Signal), and a PRS (Positioning Reference Signal) for positioning information. For example, reference signals such as the DMRS and PTRS are used to demodulate DL data signals and are transmitted using the PDSCH.

[0029] The UE 200 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable device, or an M2M (Machine-to-Machine) communication module.

[0030] The UE 200 receives control signals or data signals from the gNB 100 via DL and transmits control signals or data signals to the gNB 100 via UL, thereby utilizing various communication services provided by the wireless communication system 10. The UE 200 also receives various reference signals transmitted from the gNB 100 and measures the propagation path quality based on the reception results of the reference signals.

[0031] For example, UE200 receives control information, setting information, etc. from gNB100 as a DL signal to achieve power saving of gNB100.

[0032] Also, for example, UE200 transmits control information, data signals, terminal capability information of UE200, etc. to gNB100 as UL signals to achieve power saving of gNB100.

[0033] Channels used for transmitting 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, the UE 200 transmits control information using the PUCCH and transmits UL data signals using the PUSCH. Note that the PUSCH is an example of an uplink shared channel, and the PUCCH is an example of an uplink control channel. The shared channel may also be called a data channel. Note that the PUSCH or the PUCCH may be interpreted as uplink control information (UCI), control information, etc. transmitted in the PUSCH or the PUCCH.

[0034] The reference signal 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, the reference signal such as DMRS or PTRS is used to demodulate the UL data signal and is transmitted using the PUSCH.

[0035] <Current status of discussions on power saving for base stations> Next, the status of discussions on base station power saving in 3GPP Release 18 will be described. Techniques on the base station side and terminal side are being considered to improve network energy reduction from both the transmission and reception perspectives of the base station. For example, methods are being considered to dynamically and / or semi-statically realize more efficient operation in one or more network energy reduction techniques in the time domain, frequency domain, spatial domain, and power domain using potential support / feedback from the terminal and potential terminal assistance information, and to realize finer-grained adaptation of transmission and / or reception (e.g., Non-Patent Document 2).

[0036] <Device power saving> Next, as an example of achieving power saving in a terminal, discontinuous reception (DRX) and connected mode DRX (CDRX) in a conventional terminal will be described.

[0037] 4 is a diagram illustrating CDRX in 3GPP Release 15. In CDRX operation in 3GPP Release 15, a terminal is active during a DRX on-duration in a DRX cycle and monitors the PDCCH during the DRX on-duration.

[0038] 5 is a diagram illustrating WUS in 3GPP Release 16. In 3GPP Release 16, PDCCH-based WUS can instruct one or more terminals whether or not the terminals should monitor the PDCCH in the next DRX-on period.

[0039] DCI format 2_6, in which the CRC (Cyclic Redundancy Check) is scrambled by the PS-RNTI (Power Saving - Radio Network Temporary Identifier), is used as the PDCCH-based WUS and is also called DCP (DCI with CRC scrambled by PS-RNTI).

[0040] The WUS monitoring occasion is set by an offset from the DRX on period based on the terminal capability. If the WUS indicates "Not Active" (i.e., the terminal is not transmitting or receiving data), the terminal can skip monitoring during the DRX on period and immediately transition to sleep mode.

[0041] Furthermore, a default terminal operation may be set in case the PDCCH-based WUS is not detected due to, for example, a detection error.

[0042] DCI format 2_6 includes a 1-bit wake-up indication (information) indicating "active" or "inactive." Note that active may be interpreted as enabled, enabled, or woken up, and inactive may be interpreted as disabled, disabled, or sleep.

[0043] Conventionally, power saving of terminals has been attempted in this way, for example.

[0044] <Consideration> Currently, reducing the power consumption of base stations is becoming increasingly important in order to achieve carbon neutrality and the Sustainable Development Goals (SDGs). Furthermore, 5G will realize new functions and improved performance, but the energy requirements of base stations and terminals will become stricter. As mentioned above, while standardization of power saving is progressing for terminals, there is a problem in that technologies for reducing base station power consumption have not been standardized. To reduce the power consumption of base stations, it is important to dynamically enable / disable the base station's receiving unit (RX unit). Here, the base station receiving unit may refer to an apparatus or device for receiving signals from terminals, an apparatus or device for UL reception, etc. Furthermore, enabling the base station receiving unit may mean activating the base station receiving unit from a sleep state (switching to an active state), and disabling the base station receiving unit may mean switching the base station receiving unit from an active state to a sleep state (switching to a sleep state, hibernation state, or dormant state).

[0045] In order to reduce the power consumption of a base station, it is conceivable to introduce the above-mentioned technologies such as DRX and WUS (control information), similar to the power saving for a terminal. However, similar to the power saving for a terminal, even if the control information is used to reduce the power consumption of a base station, the control information itself, settings and operations related to the control information, etc. are not specified at all.

[0046] Therefore, in this embodiment, examples of control information, settings related to the control information, and operations for realizing a reduction in power consumption of a base station will be described.

[0047] Specifically, a mechanism for indicating whether a receiving unit of a base station (hereinafter, sometimes simply referred to as a "base station") needs to wake up / sleep for UL reception is introduced as a wake-up signal for the base station (g-WUS or gWUS: gNB Wake Up Signal) (hereinafter, referred to as a "base station wake-up signal"). The base station wake-up signal may also be referred to as a signal including an instruction (information) to wake up or put the base station to sleep, a signal to wake up or put the base station to sleep, a signal related to power reduction or power saving of the base station, a power reduction signal or a power saving signal, etc. Here, the "signal" may be interpreted as information, control information, notification, etc.

[0048] The concept of the base station activation signal may be similar to the activation signal for terminals in 3GPP Release 16 described with reference to FIG. 5. Therefore, the matters regarding WUS described above for terminals may also apply to g-WUS. For example, the base station activation signal may include a one-bit activation instruction indicating "active" or "inactive." The one-bit activation instruction is an instruction to activate or sleep the base station.

[0049] Furthermore, the concept of discontinuous reception in 3GPP Release 15 described with reference to FIG. 4 may also be applied to base stations in a similar manner.

[0050] More specifically, the base station 100 may receive, as a UCI, a base station activation signal indicating whether or not activation is required at the next discontinuous reception opportunity from the terminal 200. This may be applied when discontinuous reception by the base station 100 is enabled.

[0051] FIG. 6 is a diagram illustrating an example of a base station activation signal according to an embodiment of the present disclosure.

[0052] 6, terminal 200 may transmit a base station activation signal to base station 100 on the PUCCH or PUSCH to activate terminal 200 at the next opportunity for discontinuous reception of base station 100. Furthermore, terminal 200 may transmit the UL channel to base station 100 only during a period in which base station 100 instructs terminal 200 to activate.

[0053] 6, terminal 200 may transmit a base station activation signal to base station 100 on the PUCCH or PUSCH to instruct base station 100 to go to sleep at the next opportunity for discontinuous reception of base station 100. Terminal 200 may not transmit a UL channel to base station 100 during the period in which base station 100 instructs terminal 200 to go to sleep.

[0054] Furthermore, when the base station 100 receives a base station activation signal instructing it to sleep, it does not need to receive the UL channel transmitted by the terminal 200 at the next opportunity for discontinuous reception.

[0055] Alternatively, base station 100 may receive, as a UCI, a base station activation signal indicating whether base station 100 needs to be activated or not, from terminal 200. This may be applied when base station 100 does not have a discontinuous reception function or when discontinuous reception by base station 100 is disabled. For example, base station 100 may receive, from terminal 200, a UCI indicating the timing to activate or the UCI indicating the timing not to activate (terminal 200 may transmit the UCI indicating the timing to activate or the UCI indicating the timing not to activate to base station 100 on the PUCCH or PUSCH).

[0056] Next, details of the base station activation signal and the like transmitted as UCI from terminal 200 to base station 100 as described above will be explained.

[0057] <Proposal 1> The UCI type of the base station activation signal may be a scheduling request (SR). The SR and the base station activation signal may be understood to be synonymous. The SR may be an SR for the base station activation signal. For example, the SR for the base station activation signal may be referred to as a gWUS-SR or an SR-based base station activation signal. By setting the UCI type of the base station activation signal to SR, there is no need to introduce a new UCI type, and therefore there is no need to introduce a new sequence generation method, etc., and the complexity that would accompany the introduction of a new sequence generation method, etc., can be avoided.

[0058] [Multiple / Priority] When an SR for a base station initiated signal is used as the UCI, existing UL multiplexing / prioritization may be used. For example, at least one of intra-UE multiplexing of UCI / channels having the same priority in 3GPP Release 15, intra-UE prioritization of UCI / channels having different priorities in 3GPP Release 16, and intra-UE multiplexing of UCI / channels having different priorities in 3GPP Release 17 may be used.

[0059] Priority may be set for UCI such as, for example, SR (SR for base station initiated signals and SR other than SR for base station initiated signals), CSI, and HARQ-ACK (hybrid automatic repeat request acknowledgement).

[0060] The priority may be defined to include a certain priority (e.g., high priority (HP)) and a priority lower than the certain priority (e.g., low priority (LP)). Alternatively, three or more types of priority may be defined.

[0061] For example, terminal 200 may perform the above-mentioned intra-terminal multiplexing of UCIs having the same priority, intra-terminal prioritization of UCIs having different priorities, and intra-terminal multiplexing of UCIs having different priorities with other UCIs, as specified for SR in Sections 9 and 9.2.5 of 3GPP TS 38.313.

[0062] As an example, when resources for other UCIs and resources for SRs for base station activation signals overlap in the time domain, terminal 200 may multiplex the SRs for the base station activation signals and other UCIs based on the priorities of the SRs for the base station activation signals and other UCIs, and transmit the multiplexed SRs for the base station activation signals and other UCIs to base station 100.

[0063] As another example, when resources for another UCI and resources for an SR for a base station-initiated signal overlap in the time domain and the priority of the other UCI is lower than the priority of the SR for the base station-initiated signal, terminal 200 may cancel transmission of the other UCI and prioritize the SR for the base station-initiated signal and transmit it to base station 100. Note that cancellation may be interpreted as cancellation, suspension, abort, drop, deletion, or the like.

[0064] [Transmission power] When an SR for a base station activation signal is transmitted as UCI on the PUSCH / PUCCH, existing UL transmit power determination for PUSCH / PUCCH transmission may be used. For example, terminal 200 may determine transmit power for transmitting an SR for a base station activation signal on the PUCCH / PUSCH as specified for SR in Sections 7.1 / 7.2 of 3GPP TS 38.313. This eliminates the need to introduce a new transmit power determination method and can avoid the complexity that accompanies the introduction of a new transmit power determination method.

[0065] [Bit sequence] When an SR for a base station activation signal is used as the UCI, an existing UCI bit sequence generation method may be used. For example, terminal 200 may generate a bit sequence of an SR for a base station activation signal as specified for SR in Section 6.3.1.1 of 3GPP TS 38.312. This eliminates the need to introduce a new UCI bit sequence generation method and can avoid the complexity that accompanies the introduction of a new UCI bit sequence generation method.

[0066] [Rate Matching] When the SR for the base station initiated signal is used as the UCI, existing rate matching may be used. For example, terminal 200 may perform rate matching on the SR for the base station initiated signal and other UCI when multiplexing with other UCI, as specified for SR in Section 6.3.1.4.1 of 3GPP TS 38.312. This eliminates the need to introduce a new rate matching method and can avoid the complexity that accompanies the introduction of a new rate matching method.

[0067] <Proposal 2> When an SR for a base station initiated signal is used as UCI, the SR setting (SR configuration or SR configuration) and the PUCCH resource may be set or determined as follows.

[0068] [SR settings] When an SR for a base station activation signal is used as the UCI, an SR setting (information) for (a notification of) a base station activation signal in PUCCH transmission using a PUCCH format may be configured in terminal 200 by higher layer signaling from base station 100 (for example, RRC (Radio Resource Control) signaling, broadcast information (SIB (System Information Block)), etc.). For example, upon receiving higher layer parameters, terminal 200 may configure an SR setting (information) for a base station activation signal in PUCCH transmission using a PUCCH format. Such an SR setting may include, for example, an SR ID, an SR period and offset, and information on the PUCCH resource to be used. Such higher layer signaling (higher layer parameters) may be referred to as a setting (information) related to power saving of a base station, a setting (information) related to activating or sleeping a base station, a setting (information) related to a signal that activates or sleeps a base station, a setting (information) for transmitting a signal that activates or sleeps a base station, or the like.

[0069] PUCCH format As the above PUCCH format, for example, PUCCH format 0 (PF0) and / or PUCCH format 1 (PF1) may be supported. Therefore, the SR for the base station activation signal may be transmitted using PF0 or PF1. Of course, other PUCCH formats, such as PUCCH format 2 (PF2), PUCCH format 3 (PF3), PUCCH format 4 (PF4), and a new PUCCH format, may also be supported.

[0070] Upper layer parameters (Alt. 1) The above upper layer parameters may be existing parameters. For example, the information element SchedulingRequestResourceConfig may be used as an existing parameter. This eliminates the need to introduce new parameters, thereby avoiding the complexity that accompanies the introduction of new parameters.

[0071] (Alt. 2) Instead of or in addition to Alt. 1, the above upper layer parameters may be new parameters. For example, the information element SchedulingRequestID-gWUS may be used for the base station activation signal as a new parameter. This allows for detailed settings and control tailored to the base station activation signal.

[0072] [PUCCH Resources] When an SR for a base station activation signal is used as the UCI, a PUCCH resource for (notification of) the base station activation signal may be configured in terminal 200 by higher layer signaling (for example, RRC signaling, broadcast information, etc.) from base station 100. For example, upon receiving higher layer parameters, terminal 200 may configure a PUCCH resource for the base station activation signal. For example, the information element SchedulingRequestID-gWUS, which is the above-mentioned new parameter, may be used as the higher layer parameter. Alternatively or in addition to this, the information element SchedulingRequestResourceId may be used as the higher layer parameter. Such higher layer parameters may indicate, for example, a PUCCH resource, a PUCCH format, a periodicity and offset in which the SR can be transmitted, by an ID. Such higher layer signaling (upper layer parameters) may be referred to as settings (information) related to power saving of the base station, settings (information) related to activating or sleeping the base station, settings (information) related to a signal that activates or sleeps the base station, settings (information) related to resources for transmitting a signal that activates or sleeps the base station, etc.

[0073] The above SR configuration and PUCCH resource may be associated with each other by the ID of the SR configuration and / or the ID of the PUCCH resource.

[0074] SR Occasion (SR (transmission) opportunity) (Alt. 1) When an SR for a base station initiated signal is used as UCI, an SR occasion (the timing of transmitting an SR) may be configured in terminal 200 by higher layer signaling (e.g., RRC signaling, broadcast information, etc.) from base station 100. For example, an SR occasion may be configured in terminal 200 by a periodicity and / or offset indicated by higher layer parameters. The time unit of the periodicity and offset may be a symbol, a slot, a subframe, a millisecond, a second, etc. For example, upon receiving higher layer parameters, terminal 200 may configure an SR occasion. For example, as the higher layer parameters, one or a combination of the above-described new parameters, such as an information element SchedulingRequestID-gWUS, an information element SchedulingRequestResourceConfig, and an information element SchedulingRequestResourceId, may be used. Such higher layer parameters may indicate, for example, a PUCCH format, a periodicity and an offset at which an SR can be transmitted. Such upper layer signaling (upper layer parameters) may be referred to as settings (information) regarding power saving of the base station, settings (information) regarding starting or sleeping of the base station, settings (information) regarding signals that start or sleep the base station, settings (information) regarding resources for transmitting signals that start or sleep the base station, settings (information) regarding the timing of transmitting signals that start or sleep the base station, etc.

[0075] The terminal 200 may always transmit an SR for a base station activation signal in all SR occasions, or may transmit an SR for a base station activation signal in the next SR occasion after an arbitrary condition is satisfied. For example, such a condition may be that the terminal 200 transmits an SR for a base station activation signal in the next SR occasion after an arbitrary condition is satisfied. The condition may be that the base station has data (in the transmission buffer) to be transmitted to the base station 100 based on the Status Report. Such a condition may be referred to as a condition related to power saving of the base station, a condition related to activating or sleeping the base station, a condition related to a signal to activate or sleep the base station, a condition for transmitting a signal to activate or sleep the base station, or the like.

[0076] (Alt. 2) Instead of or in addition to Alt. 1, when an SR for a base station initiated signal is used as UCI, a MAC Control Element (CE) may trigger the SR for the base station initiated signal. Therefore, the SR for the base station initiated signal may be transmitted by terminal 200 to base station 100 at any timing. For example, when terminal 200 has data (in a transmission buffer) to transmit to base station 100 based on the BSR, the MAC CE may trigger the SR for the base station initiated signal.

[0077] ·Priority When an SR for a base station initiated signal is used as the UCI, a priority (priority index) for the SR for the base station initiated signal may be configured or provided to the terminal 200 by higher layer signaling (e.g., RRC signaling, broadcast information, etc.) from the base station 100. For example, a priority for the SR for the base station initiated signal may be configured or provided to the terminal 200 by a priority index indicated by a higher layer parameter. The priority index for the SR for the base station initiated signal may be 0 or 1. When the higher layer parameter is not configured or provided to the terminal 200, the priority index for the SR for the base station initiated signal may be fixed to 0 or 1. Note that the priority index "0" may represent the above-mentioned LP, and the priority index "1" may represent the above-mentioned HP. Alternatively, conversely, the priority index "0" may represent the above-mentioned HP, and the priority index "1" may represent the above-mentioned LP. Furthermore, three or more priority indices may be defined, and one priority index of the three or more priority indices for the SR for the base station initiated signal may be configured or provided to the terminal 200. For example, upon receiving the higher layer parameters, terminal 200 may set the priority of the SR for the base station activation signal. For example, as the higher layer parameters, one or a combination of phy-PriorityIndex in the information element SchedulingRequestResourceConfig, a new parameter, etc. may be used. Such higher layer signaling (higher layer parameters) may be referred to as a setting (information) related to control information (SR, etc.), a setting (information) related to the (transmission) priority of control information, a setting (information) related to the priority of transmitting control information, etc.

[0078] The SR settings, PUCCH resources, SR occasions, SR priorities, etc. configured by the terminal may also be referred to as parameters related to SR including instructions to wake up or put to sleep the receiving unit of the base station, parameters for transmitting an SR including instructions to wake up or put to sleep the receiving unit of the base station, etc.

[0079] <Example of wireless communication system operation> Next, an example of operation of the wireless communication system according to the embodiment of the present disclosure will be described with reference to Fig. 7. Fig. 7 is a sequence diagram showing an example of operation of the wireless communication system according to the embodiment of the present disclosure.

[0080] In step S101, the base station 100 transmits higher layer parameters to the terminal 200. The higher layer parameters may be, for example, one or more of the information element SchedulingRequestID-gWUS, the information element SchedulingRequestResourceConfig, the information element SchedulingRequestResourceId, and the like.

[0081] In step S102, terminal 200 performs configuration based on the received upper layer parameters. The configuration may be, for example, configuration of parameters related to SR for a base station activation signal including an instruction to activate or sleep a receiving unit of base station 100, such as SR configuration, PUCCH resource, SR occasion, SR priority, etc.

[0082] In step S103, terminal 200 transmits, in the SR occasion according to the settings (set parameters) in step S102, an SR for a base station activation signal including an instruction to put base station 100 to sleep, to base station 100. As a result, base station 100 that has received the base station activation signal puts the receiving unit of base station 100 to sleep at the next opportunity for discontinuous reception (DRX-on period).

[0083] When the base station 100 receives the base station activation signal transmitted from the terminal 200 in step S103, it puts the receiving unit of the base station 100 to sleep at the opportunity of discontinuous reception in step S104.

[0084] In step S105, the base station 100 wakes up the receiving unit to receive the base station wake-up signal.

[0085] In step S106, terminal 200 transmits, in the SR occasion according to the settings (set parameters) in step S102, an SR for a base station activation signal including an instruction to activate base station 100 to base station 100. As a result, base station 100 that has received the base station activation signal will activate the receiving unit of base station 100 at the next opportunity for discontinuous reception (DRX-on period).

[0086] In step S107, the base station 100 puts the receiving unit of the base station 100 into sleep mode.

[0087] In step S108, the base station 100 wakes up the receiving unit to monitor the UL channel.

[0088] In step S109, terminal 200 transmits the UL channel to base station 100. Then, base station 100 receives the UL channel during the DRX-on period. Thereafter, the same processing may be repeated.

[0089] In steps S103, S106, etc., when the resources for the SR for the base station activation signal and the resources for the other UCI overlap in the time domain, terminal 200 may multiplex the SR for the base station activation signal and the other UCI based on the priorities of the SR for the base station activation signal and the other UCI and transmit the multiplexed SR to base station 100. In addition, in steps S103, S106, etc., when the resources for the SR for the base station activation signal and the resources for the other UCI overlap in the time domain, terminal 200 may prioritize the SR for the base station activation signal and transmit it to base station 100 without transmitting the other UCI (cancel the transmission of the other UCI) based on the priorities of the SR for the base station activation signal and the other UCI, or may prioritize the other UCI and transmit it to base station 100 without transmitting the SR for the base station activation signal (cancel the transmission of the SR for the base station activation signal).

[0090] As described above, the SR (UCI) for the base station activation signal, and the settings and operations related to the SR, can save power in the base station 100.

[0091] <Modification> Which of the items described as options in Proposal 1 and Proposal 2 above (e.g., Alt.X, etc.) or described as options below are supported may depend on the configuration by RRC, the indication by MAC CE or UCI, or the terminal capabilities.

[0092] Although the above description has been given of an example in which the UCI type of the base station activation signal is SR, the UCI type of the base station activation signal may be HARQ-ACK, CSI, a new UCI type, or the like.

[0093] Although the above describes an example in which an SR is introduced for a base station activation signal, instead of or in addition to this, an SR including an instruction to activate or sleep a base station may be a general SR requesting an UL grant (UL transmission permission; allocation of PUSCH resources) from the base station so that terminal 200 can transmit a PUSCH. For example, as described above, terminal 200 may transmit the SR to base station 100 when it has data to transmit to base station 100, and when base station 100 receives the SR, base station 100 may transmit, for example, an UL grant to terminal 200. Some or all of the matters described above regarding the SR for the base station activation signal may also be applied to the SR, unless a contradiction occurs. The SR may also be referred to as an SR-based base station activation signal.

[0094] When the SR-based base station activation signal is transmitted on the PUSCH (UCI on PUSCH), a technique for transmitting control information on the PUSCH may be introduced for transmission of the signal. Also, for example, an alpha scaling factor and / or a beta offset for rate matching may be introduced, and in the case of UCI on PUSCH, terminal 200 may determine the amount of resources for UCI based on the alpha scaling factor and / or the beta offset.

[0095] <UE capability> Terminal 200 may report the following terminal capabilities to base station 100 as UE capabilities. · Whether to support base station activation signals ·Whether to support SR-based base station activation signals

[0096] (Device configuration) Next, a description will be given of an example of the functional configuration of the base station 100 and the terminal 200 that execute the processes and operations described above. The base station 100 and the terminal 200 may have the functions to implement the above-described embodiments. However, the base station 100 and the terminal 200 may each have only a part of the functions of the embodiments.

[0097] <Base station> 8 is a block diagram showing an example of a configuration of a base station 100 according to an 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 with a terminal 200 (see FIG. 9) wirelessly. The transmitting unit 101 and the receiving unit 102 may be collectively referred to as a communication unit.

[0098] Transmitter 101 transmits a DL signal to terminal 200. For example, transmitter 101 transmits the DL signal under the control of controller 103. For example, the DL signal may include information indicating scheduling related to signal transmission by terminal 200 (for example, an UL grant), control information of higher layers, etc.

[0099] For example, transmitting unit 101 transmits, as DL signals, various control signals (such as RRC layer control signals), reference signals, data signals, etc. to terminal 200. Transmitting unit 101 transmits, as DL signals, various signals, channels, setting information, control information, etc. described in the above embodiments to terminal 200.

[0100] For example, transmission section 101 transmits configuration information such as SR configuration, PUCCH resources, SR occasions, and SR priorities generated by control section 103 to terminal 200 using higher layer parameters.

[0101] Receiving unit 102 receives the UL signal transmitted from terminal 200. For example, receiving unit 102 receives the UL signal under the control of control unit 103.

[0102] For example, the receiving unit 102 receives, as UL signals, signals including terminal capability information of the terminal 200 (for example, UE capability), various control signals, reference signals, data signals, and the like from the terminal 200.

[0103] For example, the receiving unit 102 receives from the terminal 200 a scheduling request including an instruction for the base station 100 to wake up or sleep a receiving unit for receiving a signal, a multiplexed scheduling request and other control information (UCI), etc.

[0104] The control unit 103 controls the overall (communication) operation of the base station 100, including the transmission processing in the transmission unit 101 and the reception processing in the reception unit .

[0105] For example, the control unit 103 acquires information such as data and control information from the upper layer and outputs it to the transmitting unit 101. The control unit 103 also outputs the data, control information, etc. received from the receiving unit 102 to the upper layer.

[0106] For example, control unit 103 allocates resources used for transmitting and receiving DL signals and / or resources used for transmitting and receiving UL signals based on signals (e.g., data and control information, etc.) received from terminal 200 and / or data and control information, etc. acquired from a higher layer. Information related to the allocated resources may be included in control information transmitted to terminal 200.

[0107] The control unit 103 performs operations other than the transmission and reception described in the above embodiment (note that these operations may be performed by the transmission unit 101 and / or the reception unit 102).

[0108] For example, the control unit 103 generates setting information such as SR setting, PUCCH resource, SR occasion, and SR priority.

[0109] For example, the control unit 103 wakes up or puts to sleep the receiving unit for receiving a signal in accordance with a scheduling request that includes an instruction to wake up or put to sleep the receiving unit, which is used by the base station 100 to receive a signal. This allows the base station 100 to save power.

[0110] <Device> 9 is a block diagram showing an example of a configuration of terminal 200 according to an embodiment of the present disclosure. Terminal 200 includes, for example, a receiving unit 201, a transmitting unit 202, and a control unit 203. Terminal 200 communicates with, for example, base station 100 (see FIG. 8) wirelessly. Note that receiving unit 201 and transmitting unit 202 may be collectively referred to as a communication unit.

[0111] The receiving unit 201 receives a DL signal transmitted from the base station 100. For example, the receiving unit 201 receives the DL signal under the control of the control unit 203.

[0112] For example, the receiving unit 201 receives, as DL signals, various control signals, reference signals, data signals, etc. from the base station 100. The receiving unit 201 receives, as DL signals, various signals, channels, setting information, control information, etc. described in the above embodiments from the base station 100.

[0113] For example, the receiving unit 201 receives configuration information such as SR configuration, PUCCH resources, SR occasions, and SR priorities from the base station 100 using higher layer parameters.

[0114] The transmitter 202 transmits the UL signal to the base station 100. For example, the transmitter 202 transmits the UL signal under the control of the controller 203.

[0115] For example, the transmitter 202 transmits, as UL signals, signals including information about the processing capacity of the terminal 200, various control signals, reference signals, data signals, and the like to the base station 100.

[0116] For example, the transmitting unit 202 transmits the scheduling request to the base station 100 in accordance with parameters set by the control unit 203, which are related to the scheduling request including an instruction to activate or sleep a receiving unit for receiving a signal by the base station 100. This allows the base station 100 to save power.

[0117] For example, when the scheduling request and other control information (UCI) are multiplexed by the control unit 203, the transmission unit 202 transmits the multiplexed scheduling request and other control information to the base station 100.

[0118] For example, the transmitter 202 transmits the scheduling request to the base station 100 at the next transmission opportunity after the condition for transmitting the scheduling request is satisfied, among periodic transmission opportunities for transmitting the scheduling request according to the parameters set by the controller 203. This makes it possible to further conserve power in the base station 100.

[0119] The control unit 203 controls the overall (communication) operation of the terminal 200, including the reception processing in the reception unit 201 and the transmission processing in the transmission unit 202.

[0120] For example, the control unit 203 acquires information such as data and control information from a higher layer and outputs it to the transmitting unit 202. Also, the control unit 203 outputs, for example, the data and control information received from the receiving unit 201 to the higher layer.

[0121] For example, the control unit 203 controls transmission of information to be fed back to the base station 100. The information to be fed back to the base station 100 may include, for example, HARQ-ACK, channel state information (CSI), or a scheduling request (SR). The information to be fed back to the base station 100 may be included in UCI. The UCI is transmitted in a resource of the PUCCH or PUSCH.

[0122] The control unit 203 performs operations other than the transmission and reception described in the above embodiment (note that these operations may be performed by the reception unit 201 and / or the transmission unit 202).

[0123] For example, based on the upper layer parameters transmitted from the base station 100, the control unit 203 sets parameters related to the scheduling request, such as SR setting, PUCCH resource, SR occasion, SR priority, etc., which include instructions for the base station 100 to wake up or sleep the receiving unit for receiving the signal.

[0124] For example, when resources for other control information (UCI) and resources for a scheduling request overlap, the control unit 203 multiplexes the scheduling request and the other control information based on the priority of the scheduling request and the priority of the other control information, thereby enabling efficient use of resources.

[0125] For example, when resources for other control information (UCI) overlap with resources for a scheduling request and the priority of the other control information is lower than the priority of the scheduling request, the control unit 203 cancels the transmission of the other control information, thereby allowing the wake-up or sleep of the receiving unit of the base station 100 to be processed with priority.

[0126] For example, the control unit 203 determines whether a condition for transmitting a scheduling request is satisfied, for example, that the terminal 200 has data to transmit to the base station 100.

[0127] Furthermore, the channels used for transmitting DL signals and UL signals are not limited to the above examples, and may include the above-mentioned RACH and PBCH, for example.

[0128] The present disclosure has been described above. Note that the division of items in the above description is not essential to the present disclosure, and items described in two or more items may be used in combination as needed, and items described in one item may be applied to items described in another item (unless they are inconsistent).

[0129] <Hardware configuration, etc.> The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or multiple devices with software.

[0130] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0131] For example, a base station, a user terminal, or the like according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 10 is a diagram illustrating an example of the hardware configuration of a base station 100 and a terminal 200 according to an embodiment of the present disclosure. The above-described base station 100 and terminal 200 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0132] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of base station 100 and terminal 200 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0133] Each function in the base station 100 and the terminal 200 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and the memory 1002, causing the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0134] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control units 103, 203, etc. may be realized by the processor 1001.

[0135] Furthermore, the processor 1001 reads programs (program codes), 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 in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 103 of the base station 100 and the control unit 203 of the terminal 200 may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0136] The memory 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0137] Storage 1003 is a computer-readable recording medium, and may be composed of at least one of, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned storage medium may be, for example, a database, a server, or other appropriate medium including at least one of memory 1002 and storage 1003.

[0138] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitter 101, receiver 102, receiver 201, transmitter 202, etc. may be realized by the communication device 1004. The communication device 1004 may be implemented with the transmitter and receiver physically or logically separated.

[0139] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0140] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0141] Furthermore, base station 100 and terminal 200 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0142] (Summary of the embodiment) According to an embodiment of the present disclosure, a terminal is provided that includes a control unit that sets parameters related to a scheduling request including an instruction for a base station to start or sleep a receiving unit for receiving a signal, and a transmitting unit that transmits the scheduling request to the base station in accordance with the parameters.

[0143] With the above configuration, a scheduling request including an instruction to start or put to sleep the receiving unit of the base station is transmitted to the base station according to the set parameters, so that the base station that receives the scheduling request can start or put to sleep the receiving unit, thereby achieving power saving at the base station.

[0144] In the terminal, the parameters include a priority of the scheduling request, and when resources for other control information overlap with resources for the scheduling request, the control unit multiplexes the scheduling request and the other control information based on the priority of the scheduling request and the priority of the other control information, and the transmission unit transmits the multiplexed scheduling request and the other control information to the base station.

[0145] The above configuration allows for efficient use of resources.

[0146] In this terminal, the parameters include the priority of the scheduling request, and the control unit cancels transmission of the other control information when resources for other control information and resources for the scheduling request overlap and the priority of the other control information is lower than the priority of the scheduling request.

[0147] With the above configuration, the start-up or sleep of the receiving unit can be given priority.

[0148] In this terminal, the transmitter transmits the scheduling request to the base station at the next transmission opportunity among periodic transmission opportunities for transmitting the scheduling request after the conditions for transmitting the scheduling request are satisfied.

[0149] With the above configuration, for example, the receiving unit is activated when a condition is met, which further contributes to power saving of the base station.

[0150] In this terminal, the condition is that the terminal has data to transmit to the base station.

[0151] With the above configuration, for example, when the terminal needs to transmit data to the base station, the receiving unit is activated, thereby further saving power in the base station.

[0152] Furthermore, according to an embodiment of the present disclosure, a communication method is provided in which a terminal sets parameters related to a scheduling request including an instruction for a base station to wake up or sleep a receiving unit for receiving a signal, and transmits the scheduling request to the base station according to the parameters.

[0153] With the above configuration, a scheduling request including an instruction to start or put to sleep the receiving unit of the base station is transmitted to the base station according to the set parameters, so that the base station that receives the scheduling request can start or put to sleep the receiving unit, thereby achieving power saving at the base station.

[0154] (Supplementary explanation of the embodiment) Although the embodiments of the present 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, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present disclosure; two or more items may be combined as needed, and items described in one item may apply to items described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, base station 100 and terminal 200 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 100 according to an embodiment of the present disclosure and the software operated by the processor of the terminal 200 according to an embodiment of the present 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.

[0155] <Information notification, signaling> The notification of information is not limited to the aspects / embodiments described in the present disclosure and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, and broadcast information (Master Information Block (MIB) and System Information Block (SIB))), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0156] <Applicable systems> Each aspect / embodiment described in the present disclosure may be any of the following: LTE (Long Term Evolution), LTE-Advanced (LTE-A), 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 (x is, for example, an integer or decimal number)), 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)), IEEE The present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems that are extended, modified, created, or defined based on these systems. The present invention may also be applied to a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G).

[0157] <Processing procedures, etc.> The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0158] <Base station operation> In the present disclosure, a specific operation described as being performed by a base station may be performed by its upper node in some cases. 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 may be performed by at least one of the base station and another network node other than the base station (for example, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station, a combination of multiple other network nodes (for example, an MME and an S-GW) may also be used.

[0159] <Input / output direction> Information, etc. (see the section on information and signals) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may also be input / output via multiple network nodes.

[0160] <Handling of input and output information> Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0161] <Judgment method> The determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0162] <Variations of form, etc.> Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the predetermined information).

[0163] Although the present disclosure has been described in detail above, it is 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 spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure.

[0164] <Software> Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0165] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0166] <Information, Signals> The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0167] Note that terms explained 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 a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0168] <System, Network> As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0169] <Parameter, channel name> Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by an index.

[0170] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0171] <Base station> In this disclosure, terms such as "base station (BS)," "radio 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.

[0172] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0173] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0174] <Mobile station> In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0175] 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 some other suitable terminology.

[0176] <Base station / mobile station> At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be an autonomous mobile object operating based on an operational command. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does 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.

[0177] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the functions of the base station 100 described above may be configured to be possessed by the terminal 200. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0178] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 100 may be configured to have the functions of the terminal 200 described above.

[0179] Fig. 11 shows an example configuration of a vehicle 2001. As shown in Fig. 11, the 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 the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0180] The drive unit 2002 is configured, for example, by 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 operated by the user.

[0181] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0182] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0183] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information acquired from external devices via the communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.

[0184] The information service unit 2012 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0185] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as a millimeter-wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0186] The communication module 2013 can communicate via the communication port with the microprocessor 2031 and components of the vehicle 2001. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 2029, which are provided in the vehicle 2001.

[0187] 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 an external device. For example, it transmits and receives various information to and from the external device 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, a mobile station, or the like.

[0188] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021-2029 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021-2029, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0189] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on an information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker 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 external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the 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 to 2029, and the like provided in the vehicle 2001.

[0190] <Terminology and interpretation> As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0191] The terms "connected," "coupled," or any variation thereof, refer to 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" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0192] <Reference signal> The reference signal may also be abbreviated as RS (Reference Signal), and may also be called a pilot depending on the applicable standard.

[0193] <The meaning of "based on"> As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0194] <"First", "Second"> As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0195] <Means> In the configuration of each of the above devices, the "means" may be replaced with "section", "circuit", "device", etc.

[0196] <Open format> In the present disclosure, when the terms "include", "including" and their variants are used, these terms are intended to be inclusive, similar to the term "comprising". Further, the term "or" used in the present disclosure is not intended to be an exclusive disjunction.

[0197] <Time units such as TTI, frequency units such as RB, radio frame configuration> A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) independent of numerology.

[0198] Numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, etc.

[0199] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0200] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot 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.

[0201] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0202] 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 minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0203] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. However, the definition of TTI is not limited to this.

[0204] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0205] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0206] A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0207] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0208] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0209] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0210] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0211] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0212] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0213] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0214] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0215] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be variously changed.

[0216] <Maximum transmission power> The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0217] <Article> In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0218] <"Different"> In the present 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 "coupled" may also be interpreted in the same way as "different." [Industrial Applicability]

[0219] The present disclosure is useful in wireless communication systems. [Explanation of symbols]

[0220] 10. Wireless communication systems 20 NG-RAN 100 base stations (gNB) 200 User Equipment (UE) 101,202 Transmitter 102,201 Receiver 103,203 Control unit 1001 processor 1002 memory 1003 Storage 1004 Communication equipment 1005 Input Device 1006 Output Device 1007 Bus

Claims

1. a control unit for setting parameters relating to a scheduling request including an instruction for waking up or sleeping a receiving unit for receiving a signal by the base station; a transmitter for transmitting the scheduling request to the base station according to the parameter; A terminal comprising:

2. the parameters include a priority of the scheduling request; when resources for other control information and resources for the scheduling request overlap, the control unit multiplexes the scheduling request and the other control information based on a priority of the scheduling request and a priority of the other control information; the transmitter transmits the multiplexed scheduling request and the other control information to the base station. The terminal according to claim 1 .

3. the parameters include a priority of the scheduling request; When resources for the other control information and resources for the scheduling request overlap and priority of the other control information is lower than priority of the scheduling request, the control unit cancels transmission of the other control information. The terminal according to claim 1 .

4. the transmitter transmits the scheduling request to the base station at a next transmission opportunity after a condition for transmitting the scheduling request is satisfied, among periodic transmission opportunities for transmitting the scheduling request. The terminal according to claim 1 .

5. the condition being that the terminal has data to transmit to the base station; The terminal according to claim 4.

6. The device is The base station sets parameters for the scheduling request, including instructions to wake or sleep a receiving unit for receiving the signal; transmitting the scheduling request to the base station according to the parameters; Communication method.

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