Method and apparatus for transmitting and receiving signals in wireless communication system

Abstract

In relation to the transmission and reception of an LP-WUS, a resource configuration method in a time domain and a frequency domain is disclosed. In addition, disclosed are methods for dropping and reconfiguring a monitoring occasion when the monitoring occasion of a terminal for an LP-WUS collides with an uplink symbol according to a slot format configuration, downlink SSB transmission, uplink PRACH transmission, or another signal.

Description

Method and device for transmitting and receiving signals in a wireless communication system

[0001] This specification relates to methods and devices used in wireless communication systems.

[0002] Wireless communication systems are being widely deployed to provide various types of communication services, such as voice and data. Generally, a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.). Examples of multiple access systems include CDMA (Code Division Multiple Access), FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access), OFDMA (Orthogonal Frequency Division Multiple Access), and SC-FDMA (Single Carrier Frequency Division Multiple Access).

[0003] The technical problem to be solved by the present specification is to provide a method for efficiently transmitting and receiving wireless communication signals and an apparatus for doing so.

[0004] The technical challenges are not limited to those described above, and other technical challenges can be inferred from the embodiments.

[0005] The present specification provides a method and apparatus for transmitting and receiving signals in a wireless communication system.

[0006] A method is provided comprising, in one aspect of the present specification: receiving a setting for a first time unit including a slot and a symbol for monitoring a signal; and monitoring the signal based on the setting, wherein, based on the inclusion of a symbol set as an uplink within the first time unit, the signal is not monitored in part or all of the first time unit, and the signal is monitored in the earliest second time unit in the time domain after the first time unit, without including a symbol set as an uplink.

[0007] In another aspect of the present specification, a device for performing the method comprises a terminal, a processor, and a storage medium.

[0008] In another aspect of the present specification, a method is provided comprising: transmitting a setting for a first time unit including a slot and a symbol for monitoring a signal; and transmitting the signal based on the setting, wherein, based on the inclusion of a symbol set as an uplink within the first time unit, the signal is not transmitted in part or all of the first time unit, and the signal is transmitted in the earliest second time unit in the time domain after the first time unit, without including a symbol set as an uplink.

[0009] In another aspect of the present specification, a base station, a processor, and a storage medium are provided as an apparatus for performing the method.

[0010] The above devices may include at least a terminal, a network, and an autonomous vehicle capable of communicating with other autonomous vehicles other than the device.

[0011] The embodiments of this specification described above are merely some of the preferred embodiments of this specification, and various embodiments reflecting the technical features can be derived and understood by those skilled in the art based on the detailed description.

[0012] According to one embodiment of the present specification, when a signal is transmitted and received between communication devices, there is an advantage that more efficient signal transmission and reception can be performed through an operation differentiated from the prior art.

[0013] The technical effects are not limited to those described above, and other technical effects may be inferred from the examples.

[0014] Figure 1 illustrates the structure of a radio frame.

[0015] Figure 2 illustrates a resource grid of slots.

[0016] FIG. 3 illustrates a communication procedure between a terminal and a base station applicable to the present disclosure.

[0017] FIGS. 4 to 8 are drawings for explaining a signal transmission and reception method according to an embodiment of the present disclosure.

[0018] FIGS. 9 to 11 illustrate devices according to embodiments of the present disclosure.

[0019] The following technologies can be used in various wireless access systems such as CDMA, FDMA, TDMA, OFDMA, and SC-FDMA. CDMA can be implemented using wireless technologies such as UTRA (Universal Terrestrial Radio Access) or CDMA2000. TDMA can be implemented using wireless technologies such as GSM (Global System for Mobile Communications), GPRS (General Packet Radio Service), and EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented using wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (Evolved UTRA). UTRA is part of the UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) is part of E-UMTS (Evolved UMTS) using E-UTRA, and LTE-A (Advanced) / LTE-A pro is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0020] For the sake of clarity, the description is based on 3GPP communication systems (e.g., LTE, NR), but the technical scope of this specification is not limited thereto. LTE refers to technology from 3GPP TS 36.xxx Release 8 onwards. Specifically, LTE technology from 3GPP TS 36.xxx Release 10 onwards is referred to as LTE-A, and LTE technology from 3GPP TS 36.xxx Release 13 onwards is referred to as LTE-A pro. 3GPP NR refers to technology from TS 38.xxx Release 15 onwards. LTE / NR may be referred to as a 3GPP system. "xxx" indicates a specific standard document number. LTE / NR may be collectively referred to as a 3GPP system. Regarding background technology, terms, abbreviations, etc. used in the description of this specification, reference may be made to matters described in previously published standard documents. For example, the following documents may be referenced.

[0021] 3GPP NR

[0022] - 38.211: Physical channels and modulation

[0023] - 38.212: Multiplexing and channel coding

[0024] - 38.213: Physical layer procedures for control

[0025] - 38.214: Physical layer procedures for data

[0026] - 38.300: NR and NG-RAN Overall Description

[0027] - 38.331: Radio Resource Control (RRC) protocol specification

[0028] Figure 1 illustrates the structure of a wireless frame used in NR.

[0029] In NR, uplink (UL) and downlink (DL) transmissions consist of frames. A radio frame has a length of 10 ms and is defined as two 5 ms half-frames (HF). A half-frame is defined as five 1 ms subframes (SF). A subframe is divided into one or more slots, and the number of slots within a subframe depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 OFDM(A) symbols depending on the cyclic prefix (CP). When normal CP is used, each slot contains 14 symbols. When extended CP is used, each slot contains 12 symbols. Here, the symbols may include OFDM symbols (or CP-OFDM symbols) or SC-FDMA symbols (or DFT-s-OFDM symbols).

[0030] Table 1 illustrates how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS when a standard CP is used.

[0031] [Table 1]

[0032]

[0033] Table 2 illustrates how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS when an extended CP is used.

[0034] [Table 2]

[0035]

[0036] In an NR system, OFDM(A) numerology (e.g., SCS, CP length, etc.) can be configured differently among multiple cells merged into a single terminal (User Equipment; UE). Accordingly, the (absolute time) interval of a time resource (e.g., SF, slot, or TTI) (collectively referred to as TU (Time Unit) for convenience) composed of the same number of symbols can be configured differently among the merged cells.

[0037] NR supports multiple OFDM (Orthogonal Frequency Division Multiplexing) numerologies (e.g., subcarrier spacing, SCS) to support various 5G services. For example, if the SCS is 15 kHz, it supports a wide area in traditional cellular bands, and if the SCS is 30 kHz / 60 kHz, it can support dense-urban, lower latency, and wider carrier bandwidth.

[0038] The NR frequency band is defined by two types of frequency ranges (FR) (FR1 / FR2). FR1 / FR2 can be configured as shown in Table 3 below. Additionally, FR2 can refer to millimeter wave (mmW).

[0039] [Table 3]

[0040]

[0041] Figure 2 illustrates the slot structure of an NR frame.

[0042] A slot contains multiple symbols in the time domain. For example, in the case of a standard CP, one slot contains 14 symbols, and in the case of an extended CP, one slot contains 12 symbols. A carrier contains multiple subcarriers in the frequency domain. A Resource Block (RB) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. Multiple RB interlacs (simply interlacs) can be defined in the frequency domain. An interlac m∈{0, 1, ..., M-1} can be composed of (common) RBs {m, M+m, 2M+m, 3M+m, ...}. M represents the number of interlacs. A Bandwidth Part (BWP) is defined as multiple consecutive RBs (e.g., physical RB, PRB) in the frequency domain and can correspond to a single OFDM numerology (e.g., SCS(u), CP length, etc.). A carrier wave may contain up to N (e.g., 5) BWPs. Data communication is performed through the active BWPs, and only one BWP can be active for a single terminal within a single cell / carrier wave. In the resource grid, each element is referred to as a Resource Element (RE), and one modulation symbol can be mapped to it.

[0043] In a wireless communication system, a terminal receives information from a base station via the downlink (DL) and transmits information to the base station via the uplink (UL). The information transmitted and received by the base station and the terminal includes data and various control information, and various physical channels and signals exist depending on the type and purpose of the information being transmitted and received. A physical channel corresponds to a set of resource elements (REs) that carry information originating from the upper layer. A physical signal corresponds to a set of resource elements (REs) used by the physical layer (PHY), but it does not carry information originating from the upper layer. The upper layer includes the MAC (Medium Access Control) layer, RLC (Radio Link Control) layer, PDCP (Packet Data Convergence Protocol) layer, RRC (Radio Resource Control) layer, etc.

[0044] DL physical channels include PBCH (Physical Broadcast Channel), PDSCH (Physical Downlink Shared Channel), and PDCCH (Physical Downlink Control Channel). DL physical signals include DL RS (Reference Signal), PSS (Primary Synchronization Signal), and SSS (Secondary Synchronization Signal). DL RS includes DM-RS (Demodulation RS), PT-RS (Phase-tracking RS), and CSI-RS (Channel-state Information RS). UL physical channels include PRACH (Physical Random Access Channel), PUSCH (Physical Uplink Shared Channel), and PUCCH (Physical Uplink Control Channel). UL physical signals include UL RS. UL RS includes DM-RS, PT-RS, and SRS (Sounding RS).

[0045] The base station can be, for example, gNodeB.

[0046] 6G network architecture

[0047] FIG. 3 illustrates a communication procedure between a terminal and a base station applicable to the present disclosure. FIG. 3 illustrates the operation of a terminal (100) and a base station (200) transmitting and / or receiving data, and the operation performed prior to this.

[0048] Referring to FIG. 3, in step 101, the terminal (100) and the base station (200) perform synchronization. For example, the terminal (100) performs an initial cell search operation. Specifically, the terminal (100) can detect at least one synchronization signal transmitted from the base station (200) according to a predefined rule. Here, the synchronization signal may include a plurality of synchronization signals (e.g., primary synchronization signal, secondary synchronization signal) classified according to structure or use. Through this, the terminal (100) can identify the boundaries of the frame, subframe, slot, and / or symbol of the base station (200) and obtain information about the base station (200) (e.g., cell identifier).

[0049] In step 103, the terminal (100) obtains system information transmitted from the base station (200). The system information is information related to the attributes, characteristics, and / or capabilities of the base station (200) required to connect to the base station (200) and use the service, and can be classified according to content (e.g., whether it is essential for connection), transmission structure (e.g., channel used, whether it is provided on-demand), etc., and can be classified, for example, into a master information block (MIB) and a system information block (SIB). If necessary, the terminal (100) may transmit a signal requesting the system information prior to receiving the system information. However, the request and provision of the system information may be performed after the random access procedure described later.

[0050] In step 105, the terminal (100) and the base station (200) perform a random access procedure. The terminal (100) may transmit and / or receive at least one message for the random access procedure (e.g., random access preamble, RAR (random access response) message, etc.) based on information related to the random access channel of the base station (200) obtained through system information (e.g., channel location, channel structure, structure of supported preamble, etc.). For example, the terminal (100) may transmit a preamble (e.g., MSG1) through the random access channel, receive a RAR message (e.g., MSG2), transmit a message (e.g., MSG3) containing information related to the terminal (100) (e.g., identification information) to the base station (200) using scheduling information included in the RAR message, and receive a message (e.g., MSG4) for contention resolution and / or connection establishment. As another example, MSG1 and MSG3 can be transmitted and received as a single message, or MSG2 and MSG4 can be transmitted and received as a single message.

[0051] In step 107, the terminal (100) and the base station (200) perform signaling of control information. Here, the control information may be defined in various layers, such as a layer that controls the connection (e.g., a radio resource control (RRC) layer), a layer that handles mapping between logical channels and transmission channels (e.g., a media access control (MAC) layer), and a layer that handles physical channels (e.g., a physical (PHY) layer). For example, the terminal (100) and the base station (200) may perform at least one of signaling to establish a connection, signaling to determine settings related to communication, and signaling to indicate allocated resources.

[0052] In step 109, the terminal (100) and the base station (200) transmit and / or receive data. That is, the terminal (100) and the base station (200) can process, transmit and / or receive data based on the signaling of control information. For example, when transmitting data, the terminal (100) or the base station (200) may perform at least one of channel encoding, rate matching, scrambling, constellation mapping, layer mapping, waveform modulation, antenna mapping, and resource mapping on the information bits. Conversely, when receiving data, the terminal (100) or the base station (200) may perform at least one of signal extraction from resources, antenna-specific waveform demodulation, signal placement considering layer mapping, constellation demapping, descrambling, and channel decoding.

[0053] 6G System Core Technology

[0054] As core implementation technologies for 6G systems, technologies such as artificial intelligence (AI), THz (Terahertz) communication, optical wireless technology, FSO backhaul network, massive MIMO technology, blockchain, 3D networking, quantum communication, unmanned aerial vehicles, cell-free communication, wireless information and energy transfer (WIET), integration of sensing and communication, integration of access backhaul networks, holographic beamforming, big data analysis, and large intelligent surface (LIS) can be adopted.

[0055] LP-WUS

[0056] The contents examined above can be applied in combination with the proposed methods described below, or can be supplemented to clarify the technical characteristics of the proposed methods.

[0057] In addition, the methods described below can be applied in the same way to the NR system (licensed band) or shared spectrum described above, and it goes without saying that the technical concept proposed in this specification can be modified or replaced to fit the terms, expressions, structures, etc. defined in each system so that it can be implemented in the system as well.

[0058] In the Rel-18 NR standard, discussions are underway to introduce LP-WUS (low power wake-up signal) and LP-WUR (low power wake-up receiver or low power wake-up radio), a separate receiver capable of receiving it, as a method for reducing power consumption that differs slightly from the terminal power consumption reduction techniques introduced or supported in Rel-16 / 17 and others. When the receiver within the terminal (the receiver in the downlink) in existing NR systems is referred to as MR (Main radio / receiver), LP-WUR refers to a separate receiver (i.e., companion radio / receiver) that can be introduced to reduce the power consumption of the MR. LP-WUR can be simply represented as LR.

[0059] LP-WUS is modulated with OOK (On-Off Keying) to align with the slot or symbol structure of the time axis, but can be transmitted without aligning with the RE structure of the frequency axis. LP-WUS is configured to have a signal or no signal within a specific time interval, and the terminal can receive the signal simply by energy detection within that specific time interval. A sequence for spectrum flattening may be superimposed on the OOK symbol of the LP-WUS, or an OFDM sequence for extending transmission coverage or transmitting additional information may be superimposed.

[0060] The following describes the options for LP-WUS waveform generation methods. These can be understood as different methods for MC-OOK (Multi-carrier On-Off Keying) and MC-FSK (Multi-carrier Frequency Shift Keying) waveform generation.

[0061] Figures 4 and 5 show options for the LP-WUS waveform generation method.

[0062] Figures 4 and 5 relate to MC-ASK (amplitude shift keying) waveform generation. In Figures 4 and 5, K is the size of the iFFT (inverse fast Fourier transform) of CP-OFDMA (Cyclic Prefix-Orthogonal Frequency Division Multiplexing Access), and N is the number of subcarriers used in LP-WUS, including potential guard bands.

[0063] Figure 4 shows option OOK-1.

[0064] In option OOK-1, 1 OFDM symbol contains a single bit. For the subcarriers of the LP-WUS, OOK=1 means that all subcarriers are modulated. OOK=0 means that all subcarriers are zero power (from a baseband perspective).

[0065] Figure 5 shows option OOK-4.

[0066] Referring to Fig. 5, in option OOK-4, the M-bit OOK in the time domain is transformed. N subcarriers of OOK-1 are generated by the transformation (DFT / Least Square). N' samples are generated from the M bits. Signal modification may or may not be used. Truncation or other additional modifications may or may not be used. If not used, N and N' are the same. N' can be equal to K.

[0067] In FIGS. 4 and 5, the modulated subcarriers may be, for example, QAM (Quadrature Amplitude Modulation) symbols, sequences, or other signals.

[0068] The subcarriers of the potential guard band are zero power (from the baseband perspective). Optionally, of the two additional segments, one can always be modulated and the other can always be transmitted as zero power (from the baseband perspective).

[0069] In addition to OOK-1 and OOK-4, OOK-2 and OOK-3 are available as options.

[0070] Symbols modified in the OOK method may be referred to as OOK symbols. For convenience of writing below, "OOK-1 and / or OOK-4" may be simply denoted as "OOK-1 / 4".

[0071] For OOK-1, one OOK symbol can be matched to one OFDM symbol interval, and for OOK-4, M OOK symbols can be mapped to one OFDM symbol interval. Therefore, for OOK-1, 1 bit can be transmitted per OFDM symbol, and for OOK-4, M bits can be transmitted per OFDM symbol.

[0072] Meanwhile, the LP-WUS signal may be used in conjunction with the OOK waveform with an overlaid sequence. Depending on how the overlaid sequence is overlaid on each OOK signal or OFDM signal, it may affect the LP-WUS transmission time and / or the frequency resources occupied by the LP-WUS. Additionally, if information is transmitted through the overlaid sequence, this may serve as a method to expand the utilization of the LP-WUS signal. However, not all LP-WUSs can detect / decode the overlaid sequence. If the overlaid sequence modulates each subcarrier in the frequency domain, only LP-WUSs possessing Fast Fourier Transform (FFT) and / or frequency domain sequence correlation capabilities can receive the overlaid sequence. Even if the sequence is overlaid on each OOK symbol or OFDM symbol in the time domain, only LP-WUSes possessing time domain sequence correlation capabilities can receive the sequence. Since the LP-WUR of the lowest complexity may only distinguish between ON / OFF of OOK symbols, the overlaid sequence needs to be designed to take these various types of LP-WURs into account.

[0073] Various candidates are being considered for the architecture of LP-WUR, and depending on the architecture adopted, the power consumption of LP-WUR in the on and off states may vary.

[0074] At this time, the power consumption of the LP-WUR in the ON state may be at a level that cannot be ignored, or for other reasons, the terminal may be required to activate or deactivate the LP-WUR. To support this, entry conditions for the terminal to enter the activated state of the LP-WUR and exit conditions for the terminal to exit the activated state may be defined.

[0075] A WUR capable of only energy detection can be defined as LP-WUR Type 1, and a WUR capable of sequence detection can be defined as LP-WUR Type 2. LP-WUR Type 1 is configured at a low cost and can receive only information transmitted through the payload of OOK symbols. LP-WUR Type 2 is configured at a higher cost than LP-WUR Type 1 and can detect an overlaid OFDM sequence in addition to the payload of OOK symbols. LP-WUR Type 2 can also receive PSS / SSS, which are signals related to MR.

[0076] Meanwhile, a separate LP-SS (low power synchronization signal) may be defined and transmitted for time / frequency synchronization required for receiving the LP-WUR transmitted from the LP-WUR. The LP-SS may be a signal / waveform generated according to an OOK or FSK waveform generation method (similar to the LP-WUS), and an overlaid sequence may be applied. The LP-SS may be a signal transmitted periodically or aperiodisically. Based on the LP-SS, the LP-WUR may measure the power of the received signal, etc., to offload or relax the RRM measurement of the MR.

[0077] In the proposal below, the term "occasion" may refer to a transmission occasion (TO) where the base station transmits a signal, or a monitoring occasion (MO) where the receiver (such as an LP-WUR) monitors the signal, depending on the context. Since TO signifies an opportunity for a signal to be transmitted, the signal may not be transmitted at that location (depending on the configuration or the needs of the base station). Since MO signifies an opportunity to monitor the signal, the receiver may not monitor the signal at that location (depending on the configuration or the needs / situations of the base station / terminal). Additionally, for the sake of convenience, even if expressed simply as MO or TO, MO, TO, or MO and TO may be indicated depending on the proposed method and context.

[0078] In the proposal below, setting the opportunity for LP-SS / LP-WUS can be interpreted as setting one or more of the period, starting time, ending time, duration, offset within the period, and the frequency at which the signal is transmitted for LP-SS / LP-WUS.

[0079] Generally, terminals in RRC_CONNECTED mode (hereinafter referred to as CONNECTED mode or connection mode) consume a significant amount of power for PDDCH monitoring. Since the terminal monitors the PDCCH using MR, the longer the MR remains in a sleep state, the more power the terminal can reduce. To reduce power consumption, DRX operations, WUS (wake-up signal), and PDCCH monitoring adaptation operations have been introduced. All of these operations were introduced to reduce the time the terminal monitors the PDCCH and to guarantee the sleep time of the MR, thereby reducing the terminal's power consumption.

[0080] By utilizing LP-WUS / LP-WUR, the frequency of PDCCH monitoring performed by the terminal's MR can be reduced. Since the terminal's LP-WUR operates at relatively low power, it consumes less power compared to MR. A terminal in CONNECTED mode can reduce power consumption by operating the MR in a (deep / light / micro) sleep state, thereby not performing PDCCH monitoring. Additionally, if the terminal receives LP-WUS via LR and wakes up the MR based on the instructions in the received signal, the MR's sleep time can be extended. Furthermore, the terminal can receive other instructions via LP-WUS and operate the MR accordingly. For example, the terminal can receive instructions via LP-WUS to temporarily switch the MR to a sleep state.

[0081] When the terminal's PDCCH monitoring status is indicated via LP-WUS, the frequency of PDCCH monitoring performed by the terminal's MR can be adjusted. For example, when the MR is off or in a sleep state, the terminal receives LP-WUS using LP-WUR. The terminal activates the MR to perform PDCCH monitoring only when the correct LP-WUS is received. By triggering the operation of the MR via LP-WUS, unnecessary PDCCH monitoring is reduced. Lowering the frequency of PDCCH monitoring can reduce the terminal's power consumption.

[0082] The time and frequency domain resources to which the LP-WUS is transmitted can be configured in various forms. In one embodiment, the frequency domain (or BWP) to which the LP-WUS is transmitted may be configured to be located within the MR operation frequency domain (or BWP) of the terminal, or may be configured to be located in an independent frequency domain unrelated to the MR BWP.

[0083] In particular, since the LP-WUS can be shared and received by multiple terminals, a method may be considered in which a common frequency range is configured as an LP-WUS reception resource even for terminals operating in different active BWPs. Through this, multiple terminals can efficiently monitor the same LP-WUS resource.

[0084] In addition, the time domain resources of the LP-WUS must be determined by considering the operation slot or symbol configuration of the MR. For example, regarding the MR operation of the terminal, the LP-WUS needs to be instructed or configured not to transmit to areas configured as uplink (UL) slots, or areas configured as UL symbols within flexible slots.

[0085] Accordingly, the present disclosure proposes a method for setting time and frequency resources for LP-WUS transmission.

[0086] Frequency Domain Setting: A specific method for setting the receiving frequency resources of an LP-WUS is proposed so that terminals operating in different frequency domains can easily share a single LP-WUS.

[0087] Time domain setting: A method for setting resources by avoiding resources (e.g., UL resources, etc.) where LP-WUS transmission is restricted, and a method for setting time resources in the case where LP-WUS is transmitted repeatedly are proposed.

[0088] In various examples of the present disclosure, " / " and "," should be interpreted as indicating "and / or." For example, "A / B" may mean "A and / or B." Furthermore, "A, B" may mean "A and / or B." Furthermore, "A / B / C" may mean "at least one of A, B and / or C." Furthermore, "A, B, C" may mean "at least one of A, B and / or C."

[0089] The operation of a terminal triggering PDCCH monitoring based on a received LP-WUS can be implemented in various ways. An example of a method for triggering PDCCH monitoring by LP-WUS for a terminal configured with C-DRX (Connected mode discontinuous reception) is as follows.

[0090] Example 1) The terminal may receive LP-WUS in a time interval preceding the start time of the periodically configured drx-onDurationTimer to be instructed on whether to start the drx-onDurationTimer. (This may be an operation that replaces the DCP.)

[0091] Example 2) The terminal can receive LP-WUS outside of the existing C-DRX active time to be instructed to an additional potential PDCCH monitoring period in addition to the existing periodic drx-onDurationTimer.

[0092] Example 1 can be understood as an operation where LP-WUS replaces the wake-up indication of DCP. For example, when LP-WUS is received instead of the existing DCI format 2_6, it may indicate whether to start the periodically configured drx-onDurationTimer. During periods when there is no potential DRX active time, the terminal keeps the MR in a sleep state to reduce power consumption and operates LP-WUR to receive the LP-WUS. Based on the reception of LP-WUS, the start of drx-onDurationTimer may be determined according to the preset DRX operation.

[0093] Referring to FIG. 6, the terminal receives the LP-WUS during a time interval preceding the start time of drx-onDurationTimer (FG101). This may be an operation that replaces the conventional DCP. Subsequently, the terminal experiences a periodic DRX active time (e.g., the interval during which drx-onDurationTimer is operating) in response to instructions from the LP-WUS (FG102). During the opportunity for the LP-WUS to be monitored, the terminal may fail to monitor the LP-WUS (FG103). This may be because the base station did not actually transmit the LP-WUS, or because the terminal failed to receive the LP-WUS. If the LP-WUS is not received, the terminal may not perform the relevant operation during the periodic DRX active time (i.e., the operation of drx-onDurationTimer) (FG104).

[0094] Example 2 can be understood as an operation in which, if LP-WUS is received outside the configured C-DRX active time, an additional potential PDCCH monitoring period is instructed. Since the operation of Example 2 involves instructing PDCCH monitoring outside the existing C-DRX active time, it differs from the existing operation, and constraints can be established accordingly. For instance, a terminal configured with Example 2 may be expected to monitor LP-WUS according to a configured period. When the terminal receives LP-WUS, a specific timer starts, and the terminal can perform PDCCH monitoring while that timer is running. This operation of Example 2 can be configured so as not to affect operations related to existing DRX timers, excluding drx-onDurationTimer.

[0095] Additionally, it can be assumed that the RRM (Radio Resource Management), RLM (Radio Link Monitoring), and BFD (Beam Failure Detection) measurement requirements associated with the existing DRX operation remain unchanged. Regarding periodic CSI / L1-RSRP reporting, the terminal may be configured not to report when no wake-up is instructed, or to report regardless of whether a wake-up is instructed. If only the operation of Example 2 is configured, the existing C-DRX cycle and PDCCH monitoring by drx-onDurationTimer are not triggered while the terminal is monitoring the LP-WUS.

[0096] Meanwhile, if both the operation of Example 1 and Example 2 are configured on the terminal, the terminal performs PDCCH monitoring according to the conventional standard document for the previously configured C-DRX, and in other sections, it may be instructed to perform additional PDCCH monitoring through LP-WUS.

[0097] Regarding the allocation of frequency domain resources for LP-WUS, when multiple terminals share a single LP-WUS resource, those terminals must be able to commonly recognize the frequency domain in which the LP-WUS is transmitted.

[0098] In other words, even among different terminals where the MR operates on different Active BWP (bandwidth part) and / or Default BWP, the receiving frequency location of the LP-WUS they share must be configured to match for all terminals.

[0099] Meanwhile, regarding the time domain resource allocation of LP-WUS, during the time interval in which the terminal's MR performs uplink operations (e.g., UL slot / symbol, or flexible symbol interval used for UL transmission, etc.), the terminal may not be able to perform the operation of monitoring LP-WUS using LP-WUR.

[0100] In the event that such a collision occurs, the terminal may not perform a receiving operation through the LP-WUR even if it is a periodically configured LP-WUS Monitoring Occasion (MO), and subsequent terminal operations for this case (e.g., monitoring in the next cycle, determining whether to enable MR, etc.) need to be defined separately.

[0101] The base station can be configured to place the LP-WUS MO by avoiding the time interval during which the terminal's MR performs the UL operation. This prevents interference or hardware limitations between the transmission operation of the MR and the reception operation of the LP-WUR.

[0102] Method 1: How to configure frequency domain resources for LP-WUS

[0103] In order to support the operation of multiple terminals sharing and receiving a single LP-WUS, the frequency domain resource area of ​​the LP-WUS needs to be configured identically for different terminals. Accordingly, the present embodiment proposes three specific methods for configuring the frequency domain resource area of ​​an LP-WUS that can be shared and received by multiple terminals.

[0104] Method 1-1: Cell-specific configuration

[0105] The frequency domain resource area of ​​the LP-WUS can be commonly configured for the serving cell in the form of a BWP. Generally, the BWP configuration for LP-WUS reception can be configured through the lowest RB position of the BWP and the actual BWP size, based on Point A, which is a common reference point for the resource block grid. In this case, the reference subcarrier spacing can be based on the lowest subcarrier of the lowest RB of the transmitted synchronization signal and PBCH block, or set to the lowest SCS among the supported SCSs.

[0106] Multiple LP-WUS BWPs may be configured for a single cell. In this case, identical or different LP-WUS BWPs may be assigned to each group of terminals that share and receive a single LP-WUS. Each LP-WUS BWP may be assigned a unique BWP ID, and LP-WUS BWPs with the same or different BWP IDs may be configured for terminals belonging to different terminal groups.

[0107] Method 1-2: Terminal-specific configuration (UE-specific configuration)

[0108] An individual LP-WUS BWP can be configured for each terminal. Generally, a terminal can receive up to four BWPs from a cell, which may include a BWP for LP-WUS reception. Alternatively, a BWP for LP-WUS reception may be configured in addition to the four BWPs. The LP-WUS BWP can be configured in the same way as a general BWP configured on a terminal, and may have a separate BWP ID or be treated as a separate BWP.

[0109] When configured in this manner, for multiple terminals to share and receive a single LP-WUS, the frequency domain resource area of ​​the LP-WUS actually transmitted must be identical. Therefore, one of the SCS (subcarrier spacing) that all terminals within the terminal group can support can be explicitly configured.

[0110] If LP-WUS BWPs are configured separately for each terminal, a difference may occur between the frequency resource area where the actual configured LP-WUS BWP and the LP-WUS are transmitted. The base station may operate to actually transmit the LP-WUS only for the frequency resource area (intersection area) where all LP-WUS BWPs configured for terminals sharing the LP-WUS overlap. The base station may also transmit the LP-WUS for the union of the frequency resource areas of the LP-WUS BWPs. This may be valid because LP-WUS is a transmission method that utilizes OOK (On-Off Keying) modulation and considers reception through energy detection.

[0111] Method 1-3: BWP-specific configuration

[0112] The frequency resource area where the terminal expects to receive the LP-WUS can be configured based on the BWP currently set in the terminal. The terminal can receive up to four BWPs in a cell, and during operation, BWP switching operations to the default BWP or active BWP may occur. In this case, the receiving frequency resource area of ​​the LP-WUS can be configured associated with each BWP of the terminal. This is particularly useful when the receiving frequency resource area of ​​the LP-WUS is configured to be located within the MR's operating BWP, but it is also applicable when it is configured outside the MR BWP.

[0113] Based on parameters for configuring the BWP of the terminal, the receiving frequency resource area of ​​the LP-WUS is configured. Based on the configuration of the frequency resource area of ​​the BWP for the terminal, an additional frequency resource area for LP-WUS reception may be allocated. The receiving frequency resource area of ​​the LP-WUS may be included within the existing frequency resource area of ​​the BWP or configured outside that area.

[0114] When a BWP switching operation occurs at the terminal, the receiving frequency resource area of ​​the LP-WUS may be changed or maintained.

[0115] For example, if the respective LP-WUS receiving frequency resource areas are set to match for the initial BWP and the subsequently changed active BWP, the terminal receives the LP-WUS in the same frequency resource area even after switching.

[0116] On the other hand, if the respective LP-WUS reception frequency resource areas are set differently for the initial BWP and the subsequently changed active BWP, the LP-WUS area that the terminal expects to receive when BWP switching occurs is also changed.

[0117] In this way, when the LP-WUS area changes, the configuration of the group of terminals sharing and receiving the same LP-WUS may be dynamically changed according to the BWP switching of the terminals. In response to this, the base station may reconfigure the indication information to be included in the LP-WUS to match the changed group of terminals.

[0118] Method 2: How to Configure Time Domain Resources in LP-WUS

[0119] The frequency domain resource area for LP-WUS transmission (or LP-WUS receiving BWP) may be included within the terminal's MR operation BWP (e.g., active BWP or initial BWP), or may be located in partial or complete overlap with the terminal's MR operation BWP. The LP-WUS may be received by utilizing a portion of the frequency resource area where the MR receives the signal.

[0120] In relation to PDCCH transmission, a large number of REs (resource elements) may be required to support a high AL (aggregation level). To this end, frequency resources for CORESET (control resource set) may occupy a significant proportion of the frequency band of the terminal operation BWP. For example, to support a PDCCH transmission with a large allocated resource, such as AL 16, a situation may occur where CORESET occupies most of the frequency range of the operation BWP.

[0121] In order to reduce the degradation of MR PDCCH reception performance caused by LP-WUS transmission in such an environment, the MO of the LP-WUS may be configured to avoid the resource area of ​​the configured CORESET. Specifically, if the LP-WUS receiving BWP overlaps (partially or wholly) with the terminal's operating BWP and also overlaps with the frequency area of ​​(up to 4) CORESET(s) configured within the BWP, the symbol(s) for the LP-WUS MO may be configured on the remaining symbols excluding the symbol for which the CORESET is configured.

[0122] For example, assume that the terminal's default BWP and LP-WUS BWP overlap, and a specific CORESET within the default BWP is configured for the entire frequency resource and the first three symbols of the slot. The MO symbols of the LP-WUS may be configured for some or all of the symbols excluding the first three symbols of the slot. The specific CORESET may be a CORESET shared by multiple terminals, such as CORESET#0. Even if the terminal is monitoring the LP-WUS during periods when it is not operating in MR mode (e.g., periods not active during DRX or MR sleep periods), there is a possibility that a PDCCH will be transmitted within the corresponding CORESET area, and such PDCCH transmissions may be configured to have priority over LP-WUS transmissions.

[0123] If the terminal supports an LP-WUR capable of receiving an overlaid sequence, even if a situation occurs where part of the LP-WUS signal is not received due to PDCCH transmission in the CORESET area, it is expected that the LP-WUS will be fully received through the assistance of the overlaid sequence.

[0124] For example, assume a case where the LP-WUS contains information of 0101, but the symbol interval corresponding to the first bit, 0, overlaps with the CORESET (PDCCH transmission) resource, so the terminal does not receive the LP-WUS. The terminal can expect that the information (0) to be transmitted in the first symbol will be transmitted preferentially through the overlaid sequence. The base station recognizes that the information of a specific OOK symbol cannot be transmitted due to the CORESET setting and transmits the information of the OOK symbol through the overlaid sequence. If the transmission of the LP-WUS OOK symbol is restricted in a specific symbol, an operation in which the information to be transmitted in that symbol is preferentially included in the overlaid sequence is defined and determined in advance, or it may be instructed to the terminal through an LP-WUS setting message by the base station.

[0125] If the amount of information transmitted once by the LP-WUS is limited, repeated transmission of the LP-WUS may be considered. In this specification, the term "repeated transmission" includes not only cases where an LP-WUS containing the same information is transmitted repeatedly multiple times, but also cases where one piece of information is divided and transmitted across multiple LP-WUS transmission opportunities. The terminal may be configured to perform monitoring on a plurality of LP-WUS MOs for the complete reception of the LP-WUS.

[0126] The time domain resource (MO) of the LP-WUS can be configured across multiple slots.

[0127] For example, slots that are repeatedly transmitted by a single LP-WUS can be configured as a slot group. The slot group may be a set of slots that are sequential in time or a set of slots that are non-sequential.

[0128] For each slot within a slot group, the symbols transmitted by LP-WUS can be configured commonly. For example, for 14 symbols within a slot, the LP-WUS transmission availability of each symbol can be indicated in the form of a bitmap. Alternatively, independent symbol configurations may be specified for each slot within a slot group.

[0129] Assuming that LP-WUS transmission symbols are continuous within a slot, a start offset and a symbol duration from the start symbol of each slot or slot group may be indicated.

[0130] In addition, the time resources of the LP-WUS can be set to exceed one slot.

[0131] For example, for LP-WUS MO, a period exceeding one slot, an offset based on the starting slot and symbol, and a symbol interval are set. In each period, LP-WUS is transmitted for a length equal to the symbol interval, starting from the symbol after the offset based on the starting symbol within the starting slot. At this time, if there is a symbol interval remaining after the last symbol of the slot where transmission began, the remaining symbols are allocated to the symbols of the next slot. If the first few symbols of the next slot cannot be set as LP-WUS MO due to CORESET or other reasons, those symbols are excluded, and the remaining symbol interval starting from the next valid symbol is utilized as LP-WUS transmission symbols.

[0132] An LP-WUS transmission bitmap may be configured. Transmission is performed in each cycle starting from the start symbol according to the bitmap. The bitmap may be configured considering symbol intervals that cannot be configured with LP-WUS MO (e.g., CORESET symbols). Alternatively, when applying the bitmap, the terminal may determine the transmission symbols by mapping the bitmap to the symbols, assuming that symbols that cannot be used for LP-WUS transmission do not exist.

[0133] Method 3: LP-WUS MO configuration and terminal operation method considering resources that LP-WUS cannot transmit

[0134] If the MO of the LP-WUS is set to a certain proportion or more in the time axis resource area, it may also affect the resource area related to UL transmission via MR. For example, if multiple slots are allocated for LP-WUS transmission for repetitive transmission, but the last slot among them is a UL slot (or a flexible slot for UL transmission), LP-WUS transmission and / or UL transmission in that last slot may not actually be performed. Additionally, if the LP-WUS MO set on the terminal partially or wholly overlaps with periodic transmission signals such as SSB and / or TRS (Tracking Reference Signal), the terminal cannot expect to receive the full LP-WUS in that MO. This can manifest as an overlap problem between transmission symbols and UL symbols even when the LP-WUS is transmitted within a single slot.

[0135] Examples of terminal operation for cases where the LP-WUS transmission interval and UL resources (slots or symbols) overlap are as follows.

[0136] Method 3-1: Terminal operation during slot-unit overlap

[0137] Method 3-1-1: If the LP-WUS is configured to be fully transmitted within one slot, but the LP-WUS MO is set within one UL slot, the base station may not transmit the LP-WUS in that slot. The terminal considers that the LP-WUS is not transmitted in that slot and does not expect reception. This is referred to as an 'LP-WUS MO drop,' and the terminal performs an action to ignore the set MO.

[0138] Method 3-1-2: When LP-WUS is configured to be transmitted through multiple slots, some of which are UL slots, the terminal expects to receive LP-WUS only in slots that are not UL slots (DL slots or receivable flexible slots) among the multiple slots. The terminal drops only the MOs corresponding to the UL slots among the LP-WUS MOs and performs a receiving operation in the remaining sections. When LP-WUS is configured to be transmitted repeatedly through multiple slots, the terminal expects that the repeated transmission will be received in slots that are not UL slots. When repeated transmission is configured, the base station operates to omit transmission in UL slots and transmit LP-WUS only in sections that are not UL slots.

[0139] Method 3-2: Terminal operation during symbol-level overlap

[0140] In the TDD (Time Division Duplex) method, DL and UL symbols may coexist within a single slot, or flexible symbols whose usage changes dynamically may exist. Therefore, some of the LP-WUS transmission symbol(s) may overlap with UL symbols, and the terminal operation for this can be configured as one of the following embodiments.

[0141] Method 3-2-1: For one or more slots configured for LP-WUS transmission, if at least one of the configured LP-WUS transmission symbol(s) is a UL symbol, the terminal does not expect LP-WUS reception for the entire slot containing said symbol. If one or more symbols in the slot are UL symbols, the MO for said slot is dropped.

[0142] Method 3-2-2: For one or more slots configured for LP-WUS transmission, even if one or more of the LP-WUS transmission symbol(s) are UL symbols, the terminal still expects to receive the remaining LP-WUS transmission symbol(s) that are not UL symbols within the slot. The terminal can expect to receive LP-WUS through puncturing, even if time domain resources are reduced.

[0143] If the terminal includes an LP-WUR that supports receiving an overlaid sequence, it can expect to obtain all information contained in the LP-WUS through the overlaid sequence. For example, if the LP-WUS payload is 0101 and the symbol corresponding to the last 1 overlaps with a UL symbol and cannot be transmitted, the base station can transmit the information (1) through the overlaid sequence. The terminal obtains the information that could not be received due to the overlap with the UL symbol through the overlaid sequence. This operation may be predefined or instructed to the terminal by the settings of the base station.

[0144] Method 3-2-3: For one or more slots configured for LP-WUS transmission, if one or more of the LP-WUS transmission symbol(s) are UL symbols, the terminal does not expect LP-WUS reception in that slot (MO drop). Instead, the terminal expects LP-WUS reception in the slot that arrives first in time after that slot, where 'all LP-WUS transmission symbol(s) are not UL symbols'. That is, the terminal drops the MO of the slot where overlap occurred and considers the MO to exist in the earliest slot satisfying the condition (regardless of preset period, offset, etc.).

[0145] Method 3-2-4: For one or more slots configured for LP-WUS transmission, if one or more of the LP-WUS transmission symbol(s) are UL symbols, the terminal receives the LP-WUS through symbols that do not overlap within the slot. The terminal expects to receive the portion (symbol) that was not received due to overlap with the UL symbol from the 'non-UL symbol' that arrives first in time thereafter.

[0146] As previously suggested, when the LP-WUS transmission symbol is a UL symbol (or flexible symbol), a situation may arise where the LP-WUS monitoring opportunity (MO) is dropped or reception is expected from another time resource. In such cases, consideration is required regarding how the PDCCH monitoring (i.e., MR wake-up) behavior directed by the LP-WUS should differ from the existing configuration.

[0147] For a connected mode terminal, the operation of Example 2 (LP-WUS-based monitoring in the non-DRX section) described above can be implemented in two main ways.

[0148] Approach 1: This is a method in which the period and offset of the LP-WUS monitoring opportunity (MO) are set independently. After the terminal detects the LP-WUS in the set MO, it starts a new timer for PDCCH monitoring when a predetermined time offset has elapsed.

[0149] Approach 2: This is a method in which candidate slots for initiating PDCCH monitoring (i.e., a new timer) are first set, and the LP-WUS MO is determined based on this. That is, the time point prior to a specific time offset from the timer start candidate slot is designated as the LP-WUS MO.

[0150] In the above connection mode operation, if the LP-WUS transmission symbol overlaps with the UL symbol (or flexible symbol) as proposed and the LP-WUS MO is dropped, a problem may occur in which the opportunity for the terminal to start PDCCH monitoring is reduced.

[0151] Therefore, in order to maximize the opportunity to start PDCCH monitoring of the terminal, even if the LP-WUS transmission symbol is a UL symbol, rather than immediately dropping the MO as in Method 3-2-1, it may be configured to perform the operations of Methods 3-2-2 to 3-2-4 first.

[0152] When a terminal receives an LP-WUS according to either Method 3-2-3 or Method 3-2-4, the actual time of completion of reception may be delayed by a certain time T compared to a preset time. Accordingly, the setting of the PDCCH monitoring start time (the start time of the new timer) can be classified into the following embodiments.

[0153] If the terminal's complete reception of the LP-WUS is delayed by T, the start time of PDCCH monitoring can also be set to be delayed by T. This has the same effect as the LP-WUS MO configured on the terminal being shifted by T on the time axis, and the terminal starts the timer by applying the offset set based on the delayed reception time.

[0154] Even if LP-WUS reception is delayed for a certain period of time, the time at which PDCCH monitoring starts is set to remain unchanged. This may be valid in cases where the time gap between the completion of LP-WUS reception and the start of PDCCH monitoring is smaller than the set time offset, so that there is no effect on terminal operation even if the start of PDCCH monitoring is not delayed.

[0155] Regardless of the above adjustment, the base station may perform downlink transmission assuming that the terminal will start PDCCH monitoring at a predetermined time. If the terminal fails to operate at that time due to reception failure or other reasons, the base station may be expected to perform the operation of retransmitting the DL data from the previous time at another PDCCH monitoring opportunity that comes later.

[0156] Based on the Slot Format, the base station can configure an LP-WUS monitoring opportunity (MO) for a connected mode terminal only for symbols capable of downlink (DL) transmission (i.e., DL symbols and flexible symbols), excluding uplink (UL) symbols.

[0157] Method 3-3-1: An LP-WUS MO may be configured such that all transmission symbols constituting the MO are configured only for slots that are not UL symbols. If a configured LP-WUS transmission symbol corresponds to a UL symbol and cannot be physically transmitted, the terminal does not expect to receive LP-WUS at that symbol. In this case, the terminal may perform a receiving operation expecting that the LP-WUS signal will be transmitted by puncturing or rate-matching at that symbol interval.

[0158] Method 3-3-2: If the symbol scheduled for LP-WUS transmission corresponds to a UL symbol, LP-WUS transmission may be configured for other valid symbols (non-UL symbols) excluding that symbol. The base station may set the LP-WUS transmission symbol to the nearest non-UL symbol. When the nearest non-UL symbol is set, symbols located within the corresponding slot boundary may have priority. If there are no non-UL symbols within the corresponding slot, the LP-WUS transmission symbol may be set for the symbol in the next slot.

[0159] For example, LP-WUS should be configured to transmit at the 10th, 11th, 12th, and 13th symbols within a specific slot, but if the 12th and 13th symbols are UL symbols and the 8th and 9th symbols are not UL symbols, the LP-WUS transmission symbols may be changed and configured to the 8th, 9th, 10th, and 11th symbols.

[0160] Rules similar to those for the connection mode may also be applied to the LP-WUS MO configuration of an idle mode or inactive mode terminal. For an idle / inactive mode terminal, a structure in which K LP-WUS MOs are mapped for each SSB beam within one LP-WUS Occasion (LO) may be considered.

[0161] In this mapping process, similar to the 'SSB-to-RO (RACH Occasion) mapping' method of existing standards, LP-WUS MOs can be configured for the remaining symbols, excluding symbols that are untransmittable or where collisions are a concern. Specifically, K LP-WUS MOs per SSB beam can be mapped for the remaining symbols, excluding UL symbols and / or RO symbols. SSB symbols can also be excluded from the resources where LP-WUS MOs can be mapped.

[0162] In conclusion, for the remaining symbols excluding all UL symbols, RO symbols, and SSB symbols, K LP-WUS MOs per SSB beam can be mapped.

[0163] The terminal operation proposed above when the LP-WUS transmission symbol in connection mode is a UL symbol (operation in methods 3-2-1 to 3-2-4, etc.) may similarly be applied to the LP-WUS reception operation in idle / inactive mode. If the symbols for which an idle / inactive mode terminal expects to receive LP-WUS overlap with UL symbols and / or RO symbols, the terminal may not expect to receive LP-WUS at said symbol (drop), or may receive information about it at another slot / symbol.

[0164] A-IoT (Ambient Internet of Things)

[0165] A-IoT can be a new type of device or segment that operates solely on energy harvested from the surrounding environment. For example, A-IoT can refer to a new class of Internet of Things devices that operate by being powered by various energy sources harvestable from the surrounding environment, such as radio waves, light, motion, and thermal energy.

[0166] For example, active signal generation and / or backscattering may be one of the communication technologies considered to achieve low-power operation of A-IoT devices. For example, backscattering is a widely used technique in radio frequency identification (RFID) that can enable a device to communicate with a network by reflecting incident waves after modulating them with information to be transmitted. For example, the device may be powered by an incident RF signal or stored energy.

[0167] For example, A-IoT devices can be classified into various device types, such as passive, semi-passive, and active, depending on the energy storage and transmission signal generation methods. For example, a passive device does not have an energy storage device (e.g., a capacitor) and can communicate based on backscatter communication technology. For example, a semi-passive device has an energy storage device and can communicate using backscatter communication technology with the assistance of the energy storage device. For example, an active device has an energy storage device and can communicate by actively generating signals using active RF components and stored energy. For example, in the present disclosure, the following three types of IoT devices may be considered. For example, device A may be a device without energy storage and without independent signal generation (e.g., a device supporting backscatter transmission). For example, device B may be a device with energy storage and without independent signal generation (e.g., a device supporting backscatter transmission). In this case, for example, the use of the stored energy may include amplification of the reflected signal. For example, device C may be a device with energy storage and independent signal generation (e.g., a device with an active RF component for transmission).

[0168] For example, the following basic topologies may be considered to support A-IoT devices in indoor and outdoor scenarios. For example, basic topologies may include a direct connection between a base station and an A-IoT device, a connection between a base station, an intermediate node, and an A-IoT device, support for connection by an auxiliary node, and / or a connection between a terminal and an A-IoT device. The basic topologies proposed in this disclosure are merely examples, and the proposals of this disclosure may be extended and applied to other topologies.

[0169] A-IoT devices can be classified into two types as follows. For example, a Type 1 device has a maximum power consumption of approximately 1 uW, is capable of energy storage, has no amplification function, and can perform transmission by backscattering a carrier wave (CW) provided from an external source (e.g., a reader such as a base station or terminal, or a separate node). For example, a Type 2 device has a maximum power consumption of approximately several hundred uW, is capable of energy storage, has an amplification function, and can perform transmission by backscattering a carrier wave (CW) provided from an external source (e.g., a reader such as a base station or terminal, or a separate node) or by using a signal generated internally.

[0170] For example, in addition to the classification methods described above, the type / class of an A-IoT device may be distinguished based on parameters associated with device characteristics (e.g., presence / capacity of energy storage, degree of energy / power consumption, presence / capability of amplification, presence / capability of a band-pass filter (BPF), supported DL / UL transmission method(s), etc.) or combinations of parameters. Here, for example, the BPF capability may be distinguished by the 3-dB bandwidth of the supported BPF, sharpness, etc., and the UL transmission methods may be distinguished by, for example, backscattered UL transmission, UL transmission by internal signal generation, etc.

[0171] In addition, the type / class of an A-IoT device may be subdivided based on parameters associated with the above device characteristics (e.g., presence / capacity of energy storage, degree of energy / power consumption, presence / capability of amplification, presence / capability of a band-pass filter (BPF), supported DL / UL transmission method(s), etc.) or combinations of such parameters. For example, the above-described Type 2 device may be classified into Type 2a when it performs transmission by backscattering a carrier wave (CW) provided from an external source (e.g., a reader such as a base station or terminal, or a separate node), and Type 2b when it performs transmission using a signal generated internally. In this case, Types 2a and 2b may be identical in that they have a maximum power consumption of approximately several hundred uW, are capable of energy storage, and have amplification capabilities.

[0172] LP-WUS can be transmitted and received between A-IoT devices. Specifically, the waveform transmitted from the reader to the A-IoT device may correspond to the waveform proposed through the embodiments of this specification. The A-IoT device may include only LR without MR. Therefore, when the A-IoT device receives LP-WUS, it may perform operations such as initial connection or data transmission and reception through LR instead of an operation to trigger (or activate) MR.

[0173] It is evident that the examples of the proposed methods described above can also be included as one of the implementation methods and thus can be regarded as a type of proposed method. Furthermore, while the proposed methods described above may be implemented independently, they may also be implemented in the form of a combination (or merger) of some proposed methods. Rules may be defined so that information regarding the application of the proposed methods (or information regarding the rules of the proposed methods) is communicated by a base station to a terminal or by a transmitting terminal to a receiving terminal via a predefined signal (e.g., a physical layer signal or a higher layer signal).

[0174] Implementation example

[0175] FIG. 8 is a flowchart according to one embodiment.

[0176] Referring to FIG. 8, one embodiment based on the methods of the present specification may be a method comprising: receiving information for monitoring a signal (S801); and monitoring a signal based on the received information (S803). Additionally, a corresponding method may be included in the embodiment, comprising: transmitting information for monitoring a signal (S801); and transmitting a signal based on the received information (S803).

[0177] The signal represented in FIG. 8 may be, for example, an LP-WUS. Or, the signal may be a downlink signal related to PDCCH monitoring. Monitoring of the signal may be performed through a first receiver, and information for monitoring the signal may be received through a second receiver.

[0178] The first receiver corresponds to a separate receiver (i.e., LR) for receiving LP-WUS, and the second receiver corresponds to the main receiver (i.e., MR). The second receiver may be a receiver for receiving paging signals or control signals for paging signals. Alternatively, the second receiver may be a receiver capable of receiving PDCCH. Although the specific names may be changed from LP-WUS and MR to something else, the first receiver is designed to consume relatively less power than the second receiver. The main receiver may be a receiver of an existing NR system, and even if it is a receiver by a communication system other than an NR system, it may correspond to the main receiver if it is a receiver triggered based on the reception of a signal from another receiver that consumes relatively less power.

[0179] The first receiver and the second receiver may not be physically distinguishable. In the case of an A-IoT device, only the first receiver may be included among the first receiver and the second receiver.

[0180] In FIG. 8, information for monitoring a signal may include information regarding time domain resources and / or frequency domain resources for an LP-WUS disclosed in methods 1 to 3. For example, information for monitoring a signal may include information regarding one or more slots for monitoring a signal and / or one or more monitoring symbols within the slots.

[0181] In monitoring the signal of step S803, a collision such as Method 3-1 and / or Method 3-2 may occur in a monitoring opportunity established based on the information received in step S801. For each case, the operations of Methods 3-1-1 to 3-1-2 and Methods 3-2-1 to 3-2-4 may be performed.

[0182] Specifically, if an uplink symbol is included among one or more slots set for monitoring a signal, according to Method 3-2-3, monitoring is omitted in the entire slot containing the uplink symbol. Subsequently, among the resources not set as monitoring opportunities by the information received in step S801, monitoring of the signal is performed in the earliest slot in the time domain that does not include a symbol set as an uplink.

[0183] Additionally, if an uplink symbol is included among one or more slots set for monitoring a signal, according to Method 3-2-4, monitoring is omitted only at that uplink symbol. Subsequently, among the resources not set as monitoring opportunities by the information received in step S801, monitoring of the signal is performed at the symbol that is not set as the earliest uplink in the time domain.

[0184] Referring to Method 3, PDCCH monitoring can be performed based on the received signal. A timer for determining the start time of PDCCH monitoring may operate based on the monitoring opportunity prior to the change. Alternatively, the timer may operate based on the time when the actual signal is received according to a certain standard.

[0185] Information for monitoring the signal may be set within a symbol excluding symbols that may conflict with the signal (UL symbols, symbols for specific uplink signals and / or symbols for specific downlink signals).

[0186] FIG. 9 illustrates an example of a communication system 1 to which the implementations of the present specification apply. Referring to FIG. 9, the communication system (1) to which the present specification applies includes a wireless device, a BS, and a network. Here, a wireless device refers to a device that performs communication using wireless access technology (e.g., 5G NR (New RAT), LTE (e.g., E-UTRA)) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Thing) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with wireless communication capabilities, an autonomous vehicle, a vehicle capable of performing inter-vehicle communication, etc. Here, vehicles may include UAVs (Unmanned Aerial Vehicles) (e.g., drones). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices and may be implemented in the form of HMDs (Head-Mounted Devices), HUDs (Head-Up Displays) equipped in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Portable devices may include smartphones, smartpads, wearable devices (e.g., smartwatches, smart glasses), computers (e.g., laptops, etc.). Home appliances may include TVs, refrigerators, washing machines, etc. IoT devices may include sensors, smart meters, etc. For example, BS and networks may be implemented as wireless devices, and specific wireless devices may operate as BS / network nodes to other wireless devices.

[0187] Wireless devices (100a to 100f) can be connected to a network (300) via a BS (200). Artificial Intelligence (AI) technology may be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) via the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices (100a to 100f) may communicate with each other via the BS (200) / network (300), but they may also communicate directly (e.g., sidelink communication) without using the BS / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to everything) communication). Also, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0188] Wireless communication / connection (150a, 150b) may be established between wireless devices (100a~100f) / BS (200) and BS (200) / wireless devices (100a~100f). Here, the wireless communication / connection may be established through uplink / downlink communication (150a) and sidelink communication (150b) (or D2D communication) using various wireless access technologies (e.g., 5G NR). Through the wireless communication / connection (150a, 150b), wireless devices and BS / wireless devices may transmit / receive wireless signals to / from each other. To this end, based on various proposals of the present specification, at least some of the following may be performed: a process for setting various configuration information for transmitting / receiving wireless signals, a process for various signal processing (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and a resource allocation process.

[0189] FIG. 10 is a block diagram illustrating examples of communication devices capable of performing the method according to the present specification. Referring to FIG. 10, a first wireless device (100) and a second wireless device (200) can transmit and / or receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} may correspond to {wireless device (100x), BS (200)} and / or {wireless device (100x), wireless device (100x)} of FIG. 9.

[0190] The first wireless device (100) includes one or more processors (102) and one or more memories (104), and may additionally include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memory (104) and / or transceivers (106) and may be configured to implement the functions, procedures and / or methods described / suggested below. For example, the processor (102) may process information within the memory (104) to generate a first information / signal and then transmit a wireless signal containing the first information / signal through the transceiver (106). Additionally, the processor (102) may receive a wireless signal containing a second information / signal through the transceiver (106) and then store information obtained from the signal processing of the second information / signal in the memory (104). Memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, memory (104) may store software code containing instructions for performing some or all of the processes controlled by the processor (102) or for performing the procedures and / or methods described / suggested below. Here, the processor (102) and memory (104) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). A transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals through one or more antennas (108). The transceiver (106) may include a transmitter and / or receiver. The transceiver (106) may be interchangeably used with an RF (Radio Frequency) unit. In this specification, a wireless device may mean a communication modem / circuit / chip.

[0191] The second wireless device (200) includes one or more processors (202) and one or more memories (204), and may additionally include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memory (204) and / or transceivers (206) and may be configured to implement the functions, procedures and / or methods described / suggested below. For example, the processor (202) may process information within the memory (204) to generate a third information / signal and then transmit a wireless signal containing the third information / signal through the transceiver (206). Additionally, the processor (202) may receive a wireless signal containing a fourth information / signal through the transceiver (206) and then store information obtained from the signal processing of the fourth information / signal in the memory (204). Memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, memory (204) may store software code containing instructions for performing some or all of the processes controlled by the processor (202) or for performing the procedures and / or methods described / suggested below. Here, the processor (202) and memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). A transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals through one or more antennas (208). The transceiver (206) may include a transmitter and / or receiver. The transceiver (206) may be interchangeably used with an RF unit. In this specification, a wireless device may mean a communication modem / circuit / chip.

[0192] The wireless communication technology implemented in the wireless device (100, 200) of this specification may include LTE, NR, and 6G, as well as Narrowband Internet of Things for low-power communication. In this case, for example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, but is not limited to the names mentioned above. Additionally, or generally, the wireless communication technology implemented in the wireless device (XXX, YYY) of this specification may perform communication based on LTE-M technology. In this case, for example, LTE-M technology may be an example of LPWAN technology and may be referred to by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology may be implemented in at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the names mentioned above. Additionally or generally, wireless communication technology implemented in the wireless device (XXX, YYY) of this specification may include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) with consideration for low-power communication, and is not limited to the names mentioned above. As an example, ZigBee technology can create personal area networks (PANs) related to small / low-power digital communication based on various standards such as IEEE 802.15.4 and may be referred to by various names.

[0193] Hereinafter, hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a service data adaptation protocol (SDAP) layer). One or more processors (102, 202) may generate one or more protocol data units (PDU) and / or one or more service data units (SDU) according to the functions, procedures, proposals and / or methods disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document. One or more processors (102, 202) may generate a signal (e.g., baseband signal) containing a PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document and provide it to one or more transceivers (106, 206). One or more processors (102, 202) may receive a signal (e.g., baseband signal) from one or more transceivers (106, 206) and may obtain a PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document.

[0194] One or more processors (102, 202) may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The functions, procedures, proposals, and / or methods disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. Firmware or software configured to perform the functions, procedures, proposals, and / or methods disclosed in this document may be included in one or more processors (102, 202) or stored in one or more memories (104, 204) and driven by one or more processors (102, 202). The functions, procedures, proposals, and / or methods disclosed in this document may be implemented using firmware or software in the form of code, instructions, and / or sets of instructions.

[0195] One or more memories (104, 204) may be connected to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories (104, 204) may be composed of ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer read storage media, and / or combinations thereof. One or more memories (104, 204) may be located inside and / or outside of one or more processors (102, 202). Additionally, one or more memories (104, 204) may be connected to one or more processors (102, 202) through various technologies such as wired or wireless connections.

[0196] One or more transceivers (106, 206) may transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or operation flowcharts, etc., of this document to one or more other devices. One or more transceivers (106, 206) may receive user data, control information, wireless signals / channels, etc., as mentioned in the functions, procedures, proposals, methods and / or operation flowcharts, etc., disclosed in this document from one or more other devices. For example, one or more transceivers (106, 206) may be connected to one or more processors (102, 202) and may transmit and / or receive wireless signals. For example, one or more processors (102, 202) may control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and / or receive user data, control information, wireless signals / channels, etc., as mentioned in the functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document through one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert the received wireless signal / channel, etc. from an RF band signal to a baseband signal in order to process the received user data, control information, wireless signal / channel, etc. using one or more processors (102, 202).One or more transceivers (106, 206) can convert user data, control information, wireless signals / channels, etc. processed using one or more processors (102, 202) from baseband signals to RF band signals. To this end, one or more transceivers (106, 206) may include (analog) oscillators and / or filters.

[0197] FIG. 11 illustrates another example of a wireless device capable of performing implementation(s) of the present specification. Referring to FIG. 11, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 10 and may be composed of various elements, components, units / parts, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and an additional component (140). The communication unit may include a communication circuit (112) and transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) of FIG. 10 and / or one or more memories (104, 204). For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 10. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and additional components (140) and controls the general operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on a program / code / command / information stored in the memory unit (130). Additionally, the control unit (120) may transmit information stored in the memory unit (130) to the outside (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from the outside (e.g., another communication device) via a wireless / wired interface through the communication unit (110) in the memory unit (130).

[0198] The additional configuration (140) can be configured in various ways depending on the type of wireless device. For example, the additional configuration (140) may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 9, 100a), a vehicle (Fig. 9, 100b-1, 100b-2), an XR device (Fig. 9, 100c), a portable device (Fig. 9, 100d), a home appliance (Fig. 9, 100e), an IoT device (Fig. 9, 100f), a UE for digital broadcasting, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, an AI server / device (Fig. 9, 400), a BS (Fig. 9, 200), a network node, etc. Wireless devices can be used in a movable or fixed location depending on the use—e.g., service.

[0199] In FIG. 11, various elements, components, units / parts, and / or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least partially connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be connected via a wire, and the control unit (120) and the first unit (e.g., 130, 140) may be connected wirelessly via the communication unit (110). Additionally, each element, component, unit / part, and / or module within the wireless device (100, 200) may include one or more additional elements. For example, the control unit (120) may be composed of one or more sets of processors. For example, the control unit (120) may be composed of a set of communication control processors, application processors, ECUs (Electronic Control Units), graphics processing processors, memory control processors, etc. As another example, the memory unit (130) may be composed of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, transitory memory, non-transitory memory, and / or a combination thereof.

[0200] In this specification, at least one memory (e.g., 104 or 204) may store instructions or programs, and said instructions or programs may, when executed, cause at least one processor operablely connected to said at least one memory to perform operations according to some embodiments or implementations of this specification.

[0201] In this specification, a computer-readable (non-transient) storage medium may store at least one instruction or computer program, and when executed by at least one processor, said at least one instruction or computer program may cause said at least one processor to perform operations according to some embodiments or implementations of this specification.

[0202] In this specification, a processing device or apparatus may include at least one processor and at least one computer memory connectable to said at least one processor. said at least one computer memory may store instructions or programs, and said instructions or programs, when executed, may cause at least one processor operablely connected to said at least one memory to perform operations according to some embodiments or implementations of this specification.

[0203] In this specification, a computer program may include program code stored on at least one computer-readable (non-transient) storage medium and, when executed, perform operations according to some implementations of this specification or cause at least one processor to perform operations according to some implementations of this specification. The computer program may be provided in the form of a computer program product. The computer program product may include at least one computer-readable (non-transient) storage medium.

[0204] A communication device of this specification comprises at least one processor; and at least one computer memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform operations according to the examples(s) of this specification described below.

[0205] As described above, the embodiments of this specification can be applied to various wireless communication systems.

Claims

1. A step of receiving information for a first time unit including slots and symbols for monitoring a signal; The step of monitoring the signal based on the above information; is included, Based on the inclusion of a symbol set as an uplink within the first time unit, the signal is not monitored in part or all of the first time unit, and After the first time unit mentioned above, the signal is monitored in the second time unit, which is the earliest in the time domain, without including a symbol set as an uplink, method.

2. In Paragraph 1, The above signal is the LP-WUS (Low-Power Wake-Up Signal), method.

3. In Paragraph 1, Based on the fact that a symbol set as an uplink is included in the first slot among one or more slots pre-set for monitoring the above signal, the signal is not monitored in the first slot, and After the above one or more slots, the signal is monitored in the second slot, which is the earliest in the time domain among the slots that do not include a symbol set as an uplink, method.

4. In Paragraph 1, Based on the fact that a first symbol configured as an uplink is included within a specific slot among one or more slots pre-configured for monitoring the above signal, the signal is not monitored in the first symbol, and After the above one or more slots, the signal is monitored at the second symbol in the time domain that is the earliest among the symbols not set as an uplink, method.

5. In Paragraph 1, The step of receiving the signal in the second time unit; and The method further includes the step of monitoring the PDCCH (Physical Downlink Control Channel) based on the reception of the above signal, and The start time of monitoring of the above PDCCH is changed based on the above second time unit, method.

6. In Paragraph 1, The step of receiving the signal in the second time unit; and The method further includes the step of monitoring the PDCCH (Physical Downlink Control Channel) based on the reception of the above signal, and The start time of monitoring of the above PDCCH is maintained based on the above first time unit, method.

7. In Paragraph 1, The monitoring opportunity for the above signal is set within a symbol excluding the symbol set for the uplink, the symbol for the SSB (Synchronization Signal and Physical Broadcast Channel block), and the symbol for the PRACH (Physical Random Access Channel) opportunity, method.

8. At least one transceiver; At least one processor; and At least one memory connected to the at least one processor to be operable, and storing instructions that cause the at least one processor to perform a specific operation when executed; comprising The above specific operation is: A step of receiving information for a first time unit including slots and symbols for monitoring a signal; The step of monitoring the signal based on the above information; is included, Based on the inclusion of a symbol set as an uplink within the first time unit, the signal is not monitored in part or all of the first time unit, and After the first time unit mentioned above, the signal is monitored in the second time unit, which is the earliest in the time domain, without including a symbol set as an uplink, Terminal.

9. A computer-readable non-volatile storage medium comprising at least one computer program that enables a terminal including at least one processor to perform an operation, wherein the operation is: A step of receiving information for a first time unit including slots and symbols for monitoring a signal; The step of monitoring the signal based on the above information; is included, Based on the inclusion of a symbol set as an uplink within the first time unit, the signal is not monitored in part or all of the first time unit, and After the first time unit mentioned above, the signal is monitored in the second time unit, which is the earliest in the time domain, without including a symbol set as an uplink, Storage medium.

10. A step of transmitting information for a first time unit including slots and symbols for monitoring a signal; The step of transmitting the signal based on the above information; is included, Based on the inclusion of a symbol set as an uplink within the first time unit, the signal is not transmitted in part or all of the first time unit, After the first time unit mentioned above, the signal is transmitted in the second time unit, which is the earliest in the time domain, without including a symbol set as an uplink. method.

11. At least one transceiver; At least one processor; and At least one memory connected to the at least one processor to be operable, and storing instructions that cause the at least one processor to perform a specific operation when executed; comprising The above specific operation is: A step of transmitting information for a first time unit including slots and symbols for monitoring a signal; The step of transmitting the signal based on the above information; is included, Based on the inclusion of a symbol set as an uplink within the first time unit, the signal is not transmitted in part or all of the first time unit, After the first time unit mentioned above, the signal is transmitted in the second time unit, which is the earliest in the time domain, without including a symbol set as an uplink. Base station.

12. A computer-readable non-volatile storage medium comprising at least one computer program that causes a base station comprising at least one processor to perform an operation, wherein the operation is: A step of transmitting information for a first time unit including slots and symbols for monitoring a signal; The step of transmitting the signal based on the above information; is included, Based on the inclusion of a symbol set as an uplink within the first time unit, the signal is not transmitted in part or all of the first time unit, After the first time unit mentioned above, the signal is transmitted in the second time unit, which is the earliest in the time domain, without including a symbol set as an uplink. Storage medium.

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