JP7795618B2 - Terminal and communication method - Google Patents

Description

The present disclosure relates to a terminal and a communication method.

The 3rd Generation Partnership Project (3GPP) is developing 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.

For 5G, technologies are being considered that meet the requirements of large-capacity systems, high data transmission speeds, low latency, simultaneous connection of a large number of terminals, low cost, and low power consumption (for example, non-patent document 1).

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.

3GPP Release 18 is studying power saving for base stations (e.g., Non-Patent Document 2). Details are a topic for future study.

3GPP TS 38.300 V17.0.0 (2022-03) “New SI: Study on network energy savings for NR”, RP-213554, 3GPP TSG RAN Meeting #94e, 3GPP, December 2021

As such, power saving for 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 related to such control have not been fully considered.

One aspect of the present disclosure provides a terminal and a communication method that can reduce power consumption in base stations.

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 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.

In one aspect of the present disclosure, a communication method involves 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 in accordance with the parameters.

1 is a diagram illustrating an example of a wireless communication system according to an embodiment of the present disclosure. 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. 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. FIG. 1 is a diagram illustrating CDRX in 3GPP Release 15. FIG. 1 is a diagram illustrating WUS in 3GPP Release 16. FIG. 10 is a diagram illustrating an example of a base station activation signal according to an embodiment of the present disclosure. 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. FIG. 2 is a block diagram illustrating an example of a configuration of a base station according to an embodiment of the present disclosure. FIG. 2 is a block diagram illustrating an example of a configuration of a terminal according to an embodiment of the present disclosure. 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. 1 is a diagram illustrating an example of a configuration of a vehicle according to an embodiment of the present disclosure.

Below, an embodiment of one aspect of the present disclosure is described with reference to the drawings.

(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, NG-RAN 20) and a terminal 200 (hereinafter, also referred to as UE (User Equipment) 200).

In addition, the wireless communication system 10 may be a wireless communication system conforming to a method called Beyond 5G, 5G Evolution, or 6G.

NG-RAN20 includes base station 100A (hereinafter also referred to as gNB100A) and base station 100B (hereinafter also referred to as gNB100B). Note that when there is no need to distinguish between gNB100A, gNB100B, etc., they are collectively referred to as gNB or base station 100. Furthermore, the number of gNBs and UEs is not limited to the example shown in Figure 1.

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

As an example, gNB100A and gNB100B are base stations conforming to 5G and perform 5G wireless communication with UE200. gNB100A, gNB100B, and UE200 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 aggregates and uses multiple component carriers (CCs), and dual connectivity (DC), which communicates between the UE and each of two NG-RAN nodes.

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 to 52.6GHz

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.

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

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

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

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

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

gNB100 transmits control information, configuration information, etc. to UE200 as a downlink (DL) signal to achieve power saving of gNB100.

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.

Channels used to transmit 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, gNB100 transmits control information to UE200 using the PDCCH, and transmits DL data signals using the PDSCH. Note that PDSCH is an example of a downlink shared channel, and PDCCH is an example of a downlink control channel. Note that PDCCH may be interpreted as downlink control information (DCI), control information, etc. transmitted in the PDCCH.

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

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

UE200 receives control signals or data signals from gNB100 in DL and transmits control signals or data signals to gNB100 in UL to utilize various communication services provided by wireless communication system 10. UE200 also receives various reference signals transmitted from gNB100 and performs measurements of propagation path quality based on the reception results of the reference signals.

For example, UE200 receives control information, configuration information, etc. from gNB100 as a DL signal to achieve power saving in gNB100.

Furthermore, 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.

Channels used to transmit UL signals include, for example, data channels and control channels. For example, the data channel may include a physical uplink shared channel (PUSCH), and the control channel may include a physical uplink control channel (PUCCH). For example, UE 200 transmits control information using the PUCCH and transmits UL data signals using the PUSCH. Note that PUSCH is an example of an uplink shared channel, and PUCCH is an example of an uplink control channel. Shared channels may also be referred to as data channels. Note that PUSCH or PUCCH may be interpreted as uplink control information (UCI), control information, etc. transmitted on the PUSCH or PUCCH.

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

<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 the terminal side are being considered to improve network energy reduction from both the perspectives of base station transmission and reception. 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).

<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.

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

Figure 5 is a diagram explaining WUS in 3GPP Release 16. In 3GPP Release 16, PDCCH-based WUS can instruct one or more terminals whether they should monitor the PDCCH within the next DRX-on period.

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 for PDCCH-based WUS and is also called DCP (DCI with CRC scrambled by PS-RNTI).

The WUS monitoring occasion is set by an offset from the DRX on period based on the terminal capabilities. 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.

In addition, a default terminal operation may be set in case PDCCH-based WUS is not detected, for example due to a detection error.

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.

Traditionally, this is one example of how power saving has been achieved on terminals.

<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 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 receiving unit (RX unit) of the base station. Here, the receiving unit of the base station may refer to an apparatus or device for receiving signals from a terminal, an apparatus or device for UL reception, etc. Furthermore, enabling the receiving unit of the base station may mean activating the receiving unit of the base station from a sleep state (switching to an active state), and disabling the receiving unit of the base station may mean switching the receiving unit of the base station from an active state to a sleep state (switching to a sleep state, hibernation state, or dormant state).

In order to reduce the power consumption of base stations, it is conceivable to introduce technologies such as the DRX and WUS (control information) mentioned above, similar to power saving for terminals. However, similar to power saving for terminals, even if control information is used to reduce the power consumption of base stations, no regulations have been put in place regarding this control information itself, or the settings and operations related to this control information.

Therefore, in this embodiment, we will explain examples of control information, settings related to control information, and operations for reducing power consumption in base stations.

Specifically, a mechanism for indicating whether the receiving unit of a base station (hereinafter sometimes simply referred to as the "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 the "base station wake-up signal"). The base station wake-up signal may also be referred to as a signal containing instructions (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 power saving signal, etc. Here, "signal" may be interpreted as information, control information, notification, etc.

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

In addition, the concept of intermittent reception in 3GPP Release 15 described with reference to Figure 4 may also be applied to base stations in a similar manner.

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

Figure 6 is a diagram illustrating an example of a base station activation signal relating to an embodiment of the present disclosure.

As shown on the right side of Figure 6, the terminal 200 may transmit a base station activation signal to the base station 100 on the PUCCH or PUSCH to activate the terminal 200 at the next opportunity for discontinuous reception by the base station 100. The terminal 200 may also transmit a UL channel to the base station 100 only during the period when the base station 100 instructs the terminal 200 to activate.

As shown on the left side of Figure 6, the terminal 200 may transmit a base station activation signal to the base station 100 on the PUCCH or PUSCH to instruct the base station 100 to go to sleep at the next opportunity for discontinuous reception from the base station 100. The terminal 200 may not transmit a UL channel to the base station 100 during the period in which the base station 100 instructs the terminal 200 to go to sleep.

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.

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

Next, we will explain the details of the base station activation signal, etc., which is transmitted from the terminal 200 to the base station 100 as UCI as described above.

<Proposal 1>
The UCI type of the base station activation signal may be a scheduling request (SR). This SR and the base station activation signal may be understood to be synonymous. This SR may be an SR for a base station activation signal. For example, an SR for a 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.

[Multiplexing/Prioritization]
When the SR for the base station initiated signal is used as the UCI, existing UL multiplexing/prioritization may be used, such as 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.

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

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.

For example, the 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.

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

As another example, if the resources for another UCI and the resources for the SR for the base station activation 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 activation signal, the terminal 200 may cancel the transmission of the other UCI and prioritize the SR for the base station activation signal and transmit it to the base station 100. Note that cancellation may also be interpreted as cancellation, stop, abort, drop, or deletion, etc.

[Transmission power]
When an SR for a base station activation signal is transmitted as UCI on the PUSCH/PUCCH, existing UL transmission power determination for PUSCH/PUCCH transmission may be used. For example, terminal 200 may determine the transmission 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 transmission power determination method and can avoid the complexity that accompanies the introduction of a new transmission power determination method.

[Bit sequence]
When the SR for the base station activation signal is used as the UCI, an existing UCI bit sequence generation method may be used. For example, the terminal 200 may generate the bit sequence of the SR for the base station activation signal as specified for the 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.

[Rate Matching]
When the SR for the base station activation signal is used as the UCI, existing rate matching may be used. For example, as specified for the SR in Section 6.3.1.4.1 of 3GPP TS 38.312, when multiplexing with other UCI, terminal 200 may perform rate matching on the SR for the base station activation signal and other UCI. 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.

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

[SR settings]
When an SR for a base station activation signal is used as the UCI, an SR setting (information) for (notification of) a base station activation signal in PUCCH transmission using a PUCCH format may be configured in terminal 200 by higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (System Information Block (SIB)), etc.) from base station 100. 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 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 the base station, a setting (information) related to activating or sleeping the base station, a setting (information) related to a signal that activates or sleeps the base station, a setting (information) for transmitting a signal that activates or sleeps the base station, or the like.

PUCCH format: For example, PUCCH format 0 (PF0) and/or PUCCH format 1 (PF1) may be supported as the PUCCH format. 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 new PUCCH formats, may also be supported.

Higher Layer Parameters (Alt. 1) The above higher layer parameters may be existing parameters. For example, the information element SchedulingRequestResourceConfig may be used as the existing parameters. This eliminates the need to introduce new parameters, thereby avoiding the complexity that accompanies the introduction of new parameters.

(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, control, etc. to be performed in accordance with the base station activation signal.

[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 (e.g., 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-described 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, and a periodicity and offset at which the SR can be transmitted, by ID. Such upper layer signaling (upper layer parameters) may be referred to as settings (information) regarding power saving of the base station, settings (information) regarding startup or sleep 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, etc.

The above SR settings and PUCCH resources may be associated with each other by the SR setting ID and/or the PUCCH resource ID.

・SR Occasion (SR (transmission) opportunity)
(Alt. 1) When an SR for a base station activation signal is used as UCI, an SR occasion (the timing of transmitting an SR) may be configured in the terminal 200 by higher layer signaling (e.g., RRC signaling, broadcast information, etc.) from the base station 100. For example, the SR occasion may be configured in the 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, the terminal 200 may configure the SR occasion upon receiving the higher layer parameters. For example, the higher layer parameters may be one or a combination of the above-described new parameters, such as the information element SchedulingRequestID-gWUS, the information element SchedulingRequestResourceConfig, and the information element SchedulingRequestResourceId. Such higher layer parameters may indicate, for example, a PUCCH format, a periodicity and an offset at which an SR can be transmitted, etc. 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.

The terminal 200 may always transmit an SR for a base station activation signal in every SR occasion, 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 set by the terminal 200 when the terminal 200 transmits a BSR (Buffer Response Signal).
The condition may be that the base station 100 has data (in a transmission buffer) to transmit to the base station 100 based on a 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.

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

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 set 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 set or provided to the terminal 200 by a priority index indicated by a higher layer parameter. The priority index of the SR for the base station initiated signal may be 0 or 1. When the higher layer parameter is not set or provided to the terminal 200, the priority index of the SR for the base station initiated signal may be fixed to 0 or 1. Note that a priority index "0" may refer to the above-mentioned LP, and a priority index "1" may refer to the above-mentioned HP. Alternatively, conversely, a priority index "0" may refer to the above-mentioned HP, and a priority index "1" may refer to the above-mentioned LP. Furthermore, three or more priority indices may be defined, and one 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 higher layer parameters, the terminal 200 may configure the priority of the SR for the base station initiated signal. For example, as the higher layer parameters, one or a combination of phy-PriorityIndex in the information element SchedulingRequestResourceConfig, a new parameter, and the like may be used. Such higher layer signaling (higher layer parameters) may be referred to as configuration (information) related to control information (such as SR), configuration (information) related to the (transmission) priority of control information, configuration (information) related to the priority of transmitting control information, etc.

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 start or put to sleep the receiving unit of the base station, parameters for transmitting SR including instructions to start or put to sleep the receiving unit of the base station, etc.

<Example of operation of wireless communication system>
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.

In step S101, the base station 100 transmits upper layer parameters to the terminal 200. The upper layer parameters may be, for example, one or more of the information element SchedulingRequestID-gWUS, the information element SchedulingRequestResourceConfig, the information element SchedulingRequestResourceId, etc.

In step S102, the 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 put to sleep the receiving unit of the base station 100, such as SR configuration, PUCCH resources, SR occasion, SR priority, etc.

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

When the base station 100 receives the base station activation signal transmitted from the terminal 200 in step S103, in step S104, it puts the receiving unit of the base station 100 to sleep during the intermittent reception period.

In step S105, the base station 100 activates the receiving unit to receive the base station activation signal.

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

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

In step S108, the base station 100 activates the receiving unit to monitor the UL channel.

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

In addition, in steps S103, S106, etc., if the resources for the SR for the base station activation signal and the resources for other UCI overlap in the time domain, the terminal 200 may multiplex the SR for the base station activation signal and the other UCI and transmit them to the base station 100 based on the priority of the SR for the base station activation signal and the other UCI. Also, in steps S103, S106, etc., if the resources for the SR for the base station activation signal and the resources for other UCI overlap in the time domain, the terminal 200 may prioritize the SR for the base station activation signal and transmit it to the base station 100 based on the priority of the SR for the base station activation signal and the other UCI, and not transmit the other UCI (cancel the transmission of the other UCI), or may prioritize the other UCI and transmit it to the base station 100, and not transmit the SR for the base station activation signal (cancel the transmission of the SR for the base station activation signal).

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

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

The above describes an example in which the UCI type of the base station activation signal is SR, but the UCI type of the base station activation signal may also be HARQ-ACK, CSI, a new UCI type, etc.

While the above describes an example in which an SR is introduced for a base station activation signal, the SR containing an instruction to activate or sleep the base station may alternatively or additionally be a general SR requesting an UL grant (UL transmission permission; allocation of PUSCH resources) from the base station so that the terminal 200 can transmit a PUSCH. For example, as described above, the terminal 200 may transmit the SR to the base station 100 when it has data to transmit to the base station 100, and when the base station 100 receives the SR, the base station 100 may transmit, for example, an UL grant to the 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, as long as no contradictions arise. The SR may also be referred to as an SR-based base station activation signal.

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

<UE capability>
The terminal 200 may report the following terminal capabilities to the base station 100 as UE capabilities.
Whether or not to support base station activation signaling Whether or not to support SR-based base station activation signaling

(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.

<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.

The transmitting unit 101 transmits a DL signal to the terminal 200. For example, the transmitting unit 101 transmits the DL signal under the control of the control unit 103. For example, the DL signal may include information indicating scheduling regarding signal transmission by the terminal 200 (e.g., an UL grant), control information of higher layers, etc.

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

For example, the transmitting unit 101 transmits configuration information such as SR settings, PUCCH resources, SR occasions, and SR priority generated by the control unit 103 to the terminal 200 using upper layer parameters.

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

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

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 put to sleep a receiving unit for receiving a signal, a multiplexed scheduling request and other control information (UCI), etc.

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 102.

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 data, control information, etc. received from the receiving unit 102 to the upper layer.

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

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

For example, the control unit 103 generates configuration information such as SR settings, PUCCH resources, SR occasions, and SR priority.

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

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

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.

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

For example, the receiving unit 201 receives configuration information such as SR settings, PUCCH resources, SR occasions, and SR priority from the base station 100 using upper layer parameters.

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

For example, the transmitting unit 202 transmits, as an UL signal, a signal containing information regarding the processing capability of the terminal 200, various control signals, reference signals, data signals, etc. to the base station 100.

For example, the transmitting unit 202 transmits a scheduling request to the base station 100 in accordance with parameters set by the control unit 203, the scheduling request including an instruction to activate or put to sleep a receiving unit for the base station 100 to receive signals. This allows the base station 100 to save power.

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

For example, the transmitting unit 202 transmits a scheduling request to the base station 100 at the next transmission opportunity after the conditions for transmitting a scheduling request are met, among the periodic transmission opportunities for transmitting a scheduling request according to the parameters set by the control unit 203. This allows further power saving of the base station 100.

The control unit 203 controls the overall (communication) operation of the terminal 200, including the receiving processing in the receiving unit 201 and the transmitting processing in the transmitting unit 202.

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

For example, the control unit 203 controls the transmission of information to be fed back to the base station 100. The information to be fed back to the base station 100 may include, for example, 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 the resources of the PUCCH or PUSCH.

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

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., including instructions for the base station 100 to wake up or put to sleep the receiving unit for receiving the signal.

For example, when resources for other control information (UCI) overlap with resources for a scheduling request, 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. This allows resources to be used efficiently.

For example, if the resources for other control information (UCI) overlap with the resources for the 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. This allows the base station 100's receiving unit to be prioritized for startup or sleep.

For example, the control unit 203 determines whether the conditions for transmitting a scheduling request are met. For example, this condition is that the terminal 200 has data to transmit to the base station 100.

Furthermore, the channels used to transmit DL signals and UL signals are not limited to the above-mentioned examples. For example, the channels used to transmit DL signals and UL signals may include the above-mentioned RACH and PBCH.

The present disclosure has been described above. Please 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 also apply to items described in another item (unless they contradict each other).

<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 hardware and/or 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 (e.g., wired, wireless, etc.) and these multiple devices. The functional block may also be realized by combining software with the single device or multiple devices.

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

For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 10 is a diagram showing an example of the hardware configuration of a base station 100 and a terminal 200 in one embodiment of the present disclosure. The above-mentioned base station 100 and terminal 200 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

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

Each function in the base station 100 and the terminal 200 is realized by loading specified software (programs) onto hardware such as the processor 1001 and 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 storage 1003.

The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control unit, an arithmetic unit, registers, etc. For example, the above-mentioned control units 103, 203, etc. may be realized by the processor 1001.

The processor 1001 also reads programs (program code), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with these. The program used is a program that causes a computer to execute at least some of the operations described in the above-mentioned 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-mentioned 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 also be transmitted from a network via telecommunications lines.

Memory 1002 is a computer-readable recording medium and may be composed of, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. Memory 1002 may also be referred to as a register, cache, main memory (primary storage device), etc. Memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method relating to one embodiment of the present disclosure.

Storage 1003 is a computer-readable recording medium and may be composed of, for example, at least one of 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 (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) 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 suitable medium including at least one of memory 1002 and storage 1003.

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, network controller, network card, or communication module. The communication device 1004 may be configured to include a high-frequency switch, duplexer, filter, 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, and transmitter 202 may be realized by the communication device 1004. The communication device 1004 may be implemented with the transmitter and receiver physically or logically separated.

The input device 1005 is an input device (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one structure (e.g., a touch panel).

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

Furthermore, the base station 100 and the 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 this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

(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.

With the above configuration, a scheduling request including instructions to start or put to sleep the base station's receiving unit is sent 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 saving power at the base station.

In this terminal, the parameters include the 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.

The above configuration allows for efficient use of resources.

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

The above configuration allows the receiving unit to be given priority in starting up or putting to sleep.

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

The above configuration allows the receiving unit to be activated, for example, when conditions are met, thereby further reducing power consumption in the base station.

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

With the above configuration, for example, the receiving unit is activated when the terminal needs to transmit data to the base station, thereby further reducing power consumption at the base station.

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 instructions 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 in accordance with the parameters.

With the above configuration, a scheduling request including instructions to start or put to sleep the base station's receiving unit is sent 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 saving power at the base station.

(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; matters described in two or more items may be used in combination as needed, and matters described in one item may apply to matters 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, the 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, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

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

<Applicable systems>
Each aspect/embodiment described in the present disclosure may be implemented using any of the following standards: 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 a 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 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802.34 ( The present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), or other suitable 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 LTE and/or LTE-A with 5G).

<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.

<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, an MME or an S-GW, etc., but are not limited to these). 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.

<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). Information may be input or output via multiple network nodes.

<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.

<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).

<Variations in form, etc.>
The aspects/embodiments described in this disclosure may be used alone, in combination, or switched depending on the implementation. Notification of predetermined information (e.g., notification that "X is true") is not limited to explicit notification, but may be implicit (e.g., not notifying the predetermined information).

Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the 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.

<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.

Software, instructions, information, etc. may also be transmitted and received via 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), these wired and/or wireless technologies are included within the definition of transmission media.

<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.

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.

<Systems, Networks>
As used in this disclosure, the terms "system" and "network" are used interchangeably.

<Parameter and channel names>
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.

The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical formulas, etc. 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.

<Base station>
In the present disclosure, terms such as "base station (BS),""radio base station,""fixedstation,""NodeB,""eNodeB(eNB),""gNodeB(gNB),""accesspoint,""transmissionpoint,""receptionpoint,""transmission/receptionpoint,""cell,""sector,""cellgroup,""carrier," and "component carrier" may be used interchangeably. A base station may also be referred to by terms such as a macrocell, a small cell, a femtocell, and a picocell.

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

In this disclosure, a base station sending information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

<Mobile Station>
In this disclosure, the terms "Mobile Station (MS),""userterminal,""User Equipment (UE),""terminal," and the like may be used interchangeably.

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.

<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 a mobile object that moves autonomously 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.

Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect/embodiment 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 terminal 200 may be configured to have the functions possessed by the base station 100 described above. 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 uplink channel and downlink channel may be read as side channel.

Similarly, the user terminal in this disclosure may be interpreted as a base station. In this case, the base station 100 may be configured to have the functions possessed by the above-mentioned terminal 200.

Figure 11 shows an example configuration of vehicle 2001. As shown in Figure 11, vehicle 2001 comprises a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect/embodiment described in this disclosure may be applied to a communication device installed in vehicle 2001, for example, may be applied to communication module 2013.

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

The electronic control unit 2010 is composed of a microprocessor 2031, 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).

Signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the motor current, a front and rear wheel rotation speed signal obtained by a rotation speed sensor 2022, a front and rear wheel air pressure signal 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.

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

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.

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

The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 between 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 provided on the vehicle 2001.

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, etc.

The communication module 2013 may transmit at least one of the signals from the various sensors 2021-2029 described above 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 PUSH transmitted by the communication module 2013 may include information based on the above input.

The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be called an output unit 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 memory 2032 that can be used by the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc. provided in the vehicle 2001.

<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 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, all of which are considered to be "determining.""Determining" and "determining" may also include resolving, selecting, choosing, establishing, comparing, and the like, all of which are considered to be "determining." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Also, "judgment (decision)" can be interpreted as "assuming,""expecting,""considering," etc.

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.

<Reference signal>
The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

<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."

<"First" and "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.

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

<Open format>
When the terms "include,""including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

<Time units such as TTI, frequency units such as RB, and 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) that is independent of numerology.

Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

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

A slot may include multiple minislots. Each minislot may consist of one or more 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.

Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Other names may also be used for radio frame, subframe, slot, minislot, and symbol.

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. In other words, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

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

A TTI may be a transmission time unit for a channel-coded data packet (transport block), code block, code word, etc., or may be a processing unit for scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, code block, code word, etc. is actually mapped may be shorter than the TTI.

Note that when one slot or one minislot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the smallest time unit for scheduling. Furthermore, the number of slots (minislots) that constitute the smallest time unit for scheduling may be controlled.

A TTI with a time length of 1 ms may be referred to as a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be referred to as a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, minislot, subslot, slot, etc.

Note that 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 that of a long TTI and greater than or equal to 1 ms.

A resource block (RB) is a resource allocation unit in the time and frequency domains, 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.

Furthermore, the time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length. One TTI, one subframe, etc. may each consist of one or more resource blocks.

In addition, one or more RBs may also be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

A resource block may also 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.

A Bandwidth Part (BWP) (which may also be referred to as a partial 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 BWP and numbered within that BWP.

BWPs may include a BWP for the UL (UL BWP) and a BWP for the DL (DL BWP). One or more BWPs may be configured for a UE within one carrier.

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."

The above-described structures of radio frames, subframes, slots, minislots, and symbols 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, as well as the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in various ways.

<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.

＜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.

"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."

The present disclosure is useful in wireless communication systems.

10 Wireless communication system 20 NG-RAN
100 base station (gNB)
200 Terminal (UE)
101, 202 Transmitting unit 102, 201 Receiving unit 103, 203 Control unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus

Claims (6)

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