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

Abstract

According to a method and apparatus for transmitting and receiving signals in a wireless communication system, disclosed in the present specification, when a base station and a terminal transmit and receive LP-WUS and LP-SS, a QCL relationship with a specific downlink signal of another receiver can be configured.

Description

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

[0001] The present invention relates to a method and apparatus used in a wireless communication system.

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

[0003] The technical problem to be achieved by the present invention is to provide a method for efficiently transmitting and receiving wireless communication signals and a device therefor.

[0004] The technical problems of the present invention are not limited to the technical problems described above, and other technical problems can be inferred from the embodiments of the present invention.

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

[0006] As one aspect of the present invention, a method performed by a terminal in a wireless communication system is provided, comprising: receiving an LP-WUS (Low Power-Wake Up Signal) after receiving an LP-SS (Low Power-Synchronization Signal) through a first receiver of the terminal; and operating a second receiver of the terminal that has been stopped from operating based on the reception of the LP-WUS; wherein the LP-SS or the LP-WUS is assumed to have a QCL (Quasi-Co-Location) relationship with a specific downlink signal received through the second receiver before the stoppage of the operation.

[0007] As another aspect of the present invention, a device for performing the above method is provided, comprising a terminal, a processor, and a storage medium.

[0008] In another aspect of the present invention, a method performed by a base station in a wireless communication system is provided, comprising: a step of setting a QCL relationship of a Low Power-Synchronization Signal (LP-SS) and a Low Power-Wake Up Signal (LP-WUS) for a first receiver of a terminal; and a step of transmitting the LP-WUS after transmitting the LP-SS based on the QCL relationship; wherein the LP-SS or the LP-WUS is set to have a QCL (Quasi-Co-Location) relationship with a specific downlink signal transmitted to a second receiver of the terminal.

[0009] As another aspect of the present invention, a device for performing the method is provided, comprising a base station, a processor, and a storage medium.

[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 above devices.

[0011] The above-described aspects of the present invention are only some of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention can be derived and understood by a person having ordinary skill in the art based on the detailed description of the present invention described below.

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

[0013] The technical effects of the present invention are not limited to the technical effects described above, and other technical effects can be inferred from the embodiments of the present invention.

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

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

[0016] Figure 3 shows an example of physical channels being mapped within a slot.

[0017] FIGS. 4 to 12 are drawings for explaining a signal transmission and reception method according to an embodiment of the present invention.

[0018] Figures 13 to 16 illustrate devices according to embodiments of the present invention.

[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) / 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 a part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) is a part of E-UMTS (Evolved UMTS) that uses 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 clarity, the description is based on a 3GPP communication system (e.g., LTE, NR), but the technical idea of ​​the present invention is not limited thereto. LTE refers to technology after 3GPP TS 36.xxx Release 8. Specifically, LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A, and LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro. 3GPP NR refers to technology after TS 38.xxx Release 15. LTE / NR may be referred to as a 3GPP system. "xxx" refers to a standard document detail number. LTE / NR may be collectively referred to as a 3GPP system. For background technology, terms, abbreviations, etc. used in the description of the present invention, reference may be made to matters described in standard documents published prior to the present invention. For example, reference may be made to the following documents.

[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 radio frame used in NR.

[0029] In NR, uplink (UL) and downlink (DL) transmissions are structured as frames. A radio frame is 10ms long and is defined as two 5ms half-frames (HF). Each half-frame is defined as five 1ms subframes (SF). A subframe is divided into one or more slots, and the number of slots in 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 can include OFDM symbols (or CP-OFDM symbols), SC-FDMA symbols (or DFT-s-OFDM symbols).

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

[0031] [Table 1]

[0032]

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

[0034] [Table 2]

[0035]

[0036] In an NR system, OFDM(A) numerology (e.g., SCS, CP length, etc.) may be set differently between multiple cells that are merged into a single user equipment (UE). Accordingly, the (absolute time) interval of a time resource (e.g., SF, slot, or TTI) (conveniently referred to as TU (Time Unit)) consisting of the same number of symbols may be set differently between the merged cells.

[0037] NR supports multiple Orthogonal Frequency Division Multiplexing (OFDM) numerologies (e.g., subcarrier spacing, SCS) to support various 5G services. For example, a 15 kHz SCS supports wide areas in traditional cellular bands, while a 30 kHz / 60 kHz SCS can support dense urban areas, 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. FR2 can also 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, for a normal CP, one slot contains 14 symbols, and for an extended CP, one slot contains 12 symbols. A carrier contains multiple subcarriers in the frequency domain. An RB (Resource Block) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. Multiple RB interlaces (simply, interlaces) can be defined in the frequency domain. An interlace m ∈ {0, 1, ..., M-1} can be composed of (common) RBs {m, M+m, 2M+m, 3M+m, ...}. M represents the number of interlaces. A BWP (Bandwidth Part) is defined as multiple consecutive RBs (e.g., physical RBs, PRBs) in the frequency domain, and can correspond to one OFDM numerology (e.g., SCS(u), CP length, etc.). A carrier can contain up to N (e.g., 5) BWPs. Data communication is performed through activated BWPs, and only one BWP can be activated for a single terminal within a single cell / carrier. Each element in the resource grid is referred to as a Resource Element (RE), to which a single modulation symbol can be mapped.

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

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

[0045] Figure 3 shows an example of physical channels being mapped within a slot.

[0046] A DL control channel, DL or UL data, and UL control channel can all be included in a single slot. For example, the first N symbols in a slot can be used to transmit a DL control channel (hereinafter, DL control region), and the last M symbols in the slot can be used to transmit a UL control channel (hereinafter, UL control region). N and M are each integers greater than or equal to 0. A resource region (hereinafter, data region) between the DL control region and the UL control region can be used for DL ​​data transmission or UL data transmission. A time gap for DL-to-UL or UL-to-DL switching can exist between the control region and the data region. A PDCCH can be transmitted in the DL control region, and a PDSCH can be transmitted in the DL data region. Some symbols at the time of switching from DL to UL within a slot can be used as a time gap.

[0047] In the present invention, the base station may be, for example, a gNodeB.

[0048] LP-WUS (Low Power Wake-Up Signal)

[0049] The contents discussed above can be applied in combination with the methods proposed in the present invention described below, or can be supplemented to clarify the technical features of the methods proposed in the present invention.

[0050] In addition, the methods described below can be equally applied to the NR system (licensed band) or shared spectrum described above, and the technical ideas proposed in this specification can be modified or replaced to fit the terms, expressions, structures, etc. defined in each system so that they can be implemented in the corresponding systems.

[0051] In the Rel-18 NR standard, discussions are underway to introduce a low power wake-up signal (LP-WUS) and a separate receiver that can receive it, LP-WUR (low power wake-up receiver or low power wake-up radio), as a power consumption reduction method that is slightly different from the terminal power consumption reduction techniques introduced / supported in Rel-16 / 17, etc. When expressing the receiver in the terminal (receiver in the downlink) in the existing NR system as MR (Main radio / receiver), LP-WUR means 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 expressed as LR.

[0052] Below, we describe options for generating LP-WUS waveforms. These can be understood as different methods for generating MC-OOK (Multi-carrier On-Off Keying) and MC-FSK (Multi-carrier Frequency Shift Keying) waveforms.

[0053] Figures 4 to 7 illustrate options for the LP-WUS waveform generation method.

[0054] Figures 4 to 7 are related to MC-ASK (amplitude shift keying) waveform generation. In Figures 4 to 7, K is the iFFT (inverse fast Fourier transform) size of CP-OFDMA (Cyclic Prefix-Orthogonal Frequency Division Multiplexing Access), and N is the number of subcarriers used in LP-WUS, including a potential guard band.

[0055] Figure 4 shows option OOK-1.

[0056] In option OOK-1, one OFDM symbol contains a single bit. For the subcarriers of LP-WUS, OOK=1 means that all subcarriers are modulated. OOK=0 means that all subcarriers are at zero power (from the baseband perspective).

[0057] Figure 5 shows option OOK-2.

[0058] Referring to Figure 5, Option OOK-2 includes M bits of OOK in parallel within the frequency domain. The N subcarriers of LP-WUS are divided into M segments. Guard bands may be included between and / or around each segment. OOK=1 means that all subcarriers within the segment are modulated. OOK=0 means that all subcarriers within the segment are at zero power (from a baseband perspective).

[0059] Figure 6 shows option OOK-3.

[0060] Referring to FIG. 6, option OOK-3 corresponds to a multi-tone single-bit OOK. The N subcarriers of LP-WUS are divided into L segments. There is no guard band between segments, and there may be guard bands around the segments. OOK=1 means that one subcarrier (recognized by the UE) of each segment is modulated, and the remaining subcarriers are at zero power (from the baseband perspective). OOK=0 means that all subcarriers within the segment are at zero power (from the baseband perspective).

[0061] Figure 7 shows option OOK-4.

[0062] Referring to Fig. 7, in option OOK-4, an M-bit OOK in the time domain is transformed. N subcarriers of OOK-1 are generated by a 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.

[0063] In FIGS. 4 to 7, the modulated subcarriers may be, for example, QAM (Quadrature Amplitude Modulation) symbols, sequences, or other signals.

[0064] The subcarriers in the potential guard band are zero power (from the baseband perspective). Optionally, one of the two additional segments can be always modulated and one can always be transmitted at zero power (from the baseband perspective).

[0065] Symbols modified in the OOK manner may be referred to as OOK symbols. For convenience, "OOK-1 and / or OOK-4" may be simply written as "OOK-1 / 4."

[0066] 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, OOK-1 can transmit 1 bit per OFDM symbol, and OOK-4 can transmit M bits per OFDM symbol. If MC (Manchester encoding) is additionally used for LP-WUS, twice as many OFDM symbols may be required to transmit the same bit. Meanwhile, a terminal (including LP-WUR) that receives LP-WUS can perform an MR wake-up operation. For this purpose, an ID (identifier) ​​that can distinguish each terminal or a (sub)group of terminals can be included in the LP-WUS signal. The UE ID can be (for example) a 5G-S-TMSI value or a value reduced by modulo operation, etc. This value can be approximately 48 bits depending on the ID used. Accordingly, a significant number of OFDM symbols may be used to transmit a UE ID via OOK-1 / 4. For example, assuming the use of MC to transmit a 48-bit UE ID, 96 OFDM symbols are required for OOK-1. When the part containing information such as the UE ID is called the message part of LP-WUS, if a preamble part to assist in receiving the message part is transmitted together, the number of OFDM symbols required may increase. The preamble part can convey information necessary for LR to detect / decode the message part. Fig. 8 shows an example of LP-WUS transmission including a preamble part and a message part.

[0067] If an LP-WUS signal transmitted to a specific terminal (or group of terminals) occupies a specific (frequency / time) channel for a certain period of time, it may result in inefficient use of resources for both the network and the terminal. From the perspective of receiving the LP-WUS signal, it may be vulnerable to interference. Furthermore, if accurate time synchronization is not secured, LP-WUR may have to attempt monitoring for a period of time longer than the actual length of the LP-WUS signal. When the LP-WUS signal is composed of a preamble part and a message part, an effective signal configuration and setting method is required.

[0068] Meanwhile, the LP-WUS signal may use an overlaid sequence together with the OOK waveform. 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 some information is transmitted through the overlaid sequence, this may be a way 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 that have 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-WUSs that have sequence correlation capabilities in the time domain can receive the sequence. Since the lowest complexity LP-WUR may only distinguish ON / OFF of the OOK symbol, the overlay sequence needs to be designed considering these various types of LP-WUR.

[0069] Meanwhile, a separate LP-SS (low power synchronization signal) may be defined and transmitted to synchronize the time / frequency 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 overlay sequence may be applied. The LP-SS may be a signal transmitted periodically or aperiodically. 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.

[0070] As described above, the LP-WUS signal (transmitted by the base station) can be composed of a preamble part and a message part. The preamble part can include information necessary for receiving the message part transmitted subsequently (e.g., data rate, modulation, encoding method of the message part, etc.). Alternatively, the preamble part can include a known sequence / signal without conveying any specific information. Alternatively, a separate known sequence / signal can be transmitted together before or after the preamble part. The message part can carry identification information (for a specific terminal or a (sub)group of terminals), or can simply transmit a wake-up indication for multiple terminals. Alternatively, cell-related information, emergency-related information such as ETWS (Earthquake and Tsunami Warning System) / CMAS (Commercial Mobile Alert System), tracking area, RAN (radio access network) area, SI (system information) change instructions, or system-related information (for a terminal) or paging-related information may be transmitted. In addition to the preamble part and / or the message part, a CRC (Cyclic Redundancy Check) may be transmitted. At this time, the CRC may be generated based on the preamble part and / or the message part. Depending on the setting, the CRC may not be added. Although the proposed methods of the present invention have been described assuming a preamble part, a message part and / or a CRC having such characteristics, they are not necessarily limited to LP-WUS transmission having such a structure.

[0071] In the following proposal, the occasion can mean a TO (transmission occasion) when a base station transmits a signal or a MO (monitoring occasion) when a receiver (such as an LP-WUR) monitors a signal, depending on the context. Since TO means 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). MO means an opportunity to monitor a signal, so the receiver may not monitor the signal at that location (depending on the configuration or the needs / circumstances of the base station / terminal). In addition, for the convenience of writing, even if it is simply expressed as MO or TO, it can represent MO, TO, or MO and TO depending on the proposal method and context.

[0072] The following proposal assumes periodically transmitted LP-SS (unless otherwise noted). However, the proposed method and configuration can equally be applied to aperiodically transmitted LP-SS.

[0073] In the following proposal, the preamble part of LP-WUS is described as being intended to convey configuration information for transmission of subsequent message parts, or as including such information transmission part and a known sequence / signal. However, in cases where information for transmission of the message part is conveyed via LP-SS, or where the preamble part is used as a known sequence / signal (without separate information transmission), the preamble or preamble part in the proposed method described below may be replaced with LP-SS.

[0074] In this specification, the symbols "●" and "■" listed at the beginning of each paragraph can indicate vertical / horizontal relationships between descriptions within each paragraph. Specifically, "●" and "■" can indicate higher-order categories in that order. For example, a "■" listed after a "●" can be an additional explanation of the "●".

[0075] 1) Receiver (Entity A)

[0076] [Method #A1] How to set / receive the preamble part / message part as a separate opportunity

[0077] [Method A1-1] A terminal can separately define or set opportunities for the preamble and message parts that constitute LP-WUS. The setting method at this time may be a higher layer parameter (e.g., RRC, SIB(1)). Alternatively, the setting method may be differentiated depending on the RRC mode / state of the terminal. For example, a connected mode terminal may set / receive opportunities through RRC, while an idle mode or inactive mode terminal may set / receive opportunities through SIB1. The following method may be used as an example of this.

[0078] ● Example 1: The opportunities for the preamble part and the message part are set through upper layer parameters.

[0079] ● Example 2: Setting / defining the minimum (time) gap between the opportunities of the preamble part and the message part

[0080] ■ In this case, the terminal may not expect the distance between the opportunities of the preamble part and the message part to be less than the minimum interval mentioned above. Alternatively, the terminal may ignore the opportunities of the preamble part or the message part that do not satisfy the minimum interval mentioned above.

[0081] ■ The above minimum interval may be the interval between the last OOK / OFDM symbol of the preamble part (or message part) and the first OOK / OFDM symbol of the message part (or preamble part), or the interval between the first OOK / OFDM symbols of each part.

[0082] ■ The terminal can set the above minimum interval through a higher layer parameter or can be set / instructed through a preamble part. The above minimum interval can be a time such as msec, or the number of OOK symbols or OFDM symbols.

[0083] ● Example 3: When a periodic LP-SS is set for a terminal, the minimum interval may change depending on the LP-SS cycle. For example, the terminal may be configured with a minimum interval for each LP-SS cycle through a higher layer parameter. Alternatively, the terminal may be configured with a minimum interval for each cycle and apply an additional offset (which may be configured / defined through a higher layer parameter) proportional to each cycle.

[0084] ■ If the terminal is not configured with (periodic) LP-SS, the minimum interval and additional values ​​may be applied as specific values ​​(e.g., zero).

[0085] [Method A1-2] The terminal can define or set the opportunity of the preamble part (or message part) as in Method A1-1, and determine the opportunity of the message part (or preamble part) based on this.

[0086] ● Example 1: The terminal sets the opportunity of the preamble part, and the opportunity of the message part can be determined to include the length of the message part (with or without CRC) from the earliest OOK / OFDM symbol after the end point of the preamble part (e.g., the last OOK / OFDM symbol).

[0087] ● Example 2: The terminal sets the opportunity of the message part, and the opportunity of the preamble part can be determined so that the latest OOK / OFDM symbol before the start point of the message part (e.g., the first OOK / OFDM symbol) becomes the last OOK / OFDM symbol of the preamble part.

[0088] ● Example 3: After the terminal receives the opportunity of the preamble part, the opportunity of the message part can be determined such that the end point of the preamble part (e.g., the last OOK / OFDM symbol) has a specific time offset from the first (or last) OOK / OFDM symbol of the message part (with or without CRC).

[0089] ● Example 4: The terminal sets the opportunity of the message part, and the opportunity of the preamble part can be determined so that the starting point of the message part (e.g., the first OOK / OFDM symbol) has a specific time offset from the last (or first) OOK / OFDM symbol of the preamble part.

[0090] ● Example 5: When a terminal is configured with a periodic LP-SS, the time offset value may change according to the LP-SS cycle. For example, the terminal may be configured with a time offset for each cycle of the LP-SS through a higher layer parameter. Alternatively, the terminal may be configured with a time offset for each cycle and apply an additional time offset (which may be configured / defined through a higher layer parameter) proportional to each cycle.

[0091] ■ If the terminal is not configured with (periodic) LP-SS, a specific value (e.g., zero) may be applied to the offset.

[0092] ■ Embodiment 1 or Embodiment 3 can operate in the same manner as in Fig. 8.

[0093] ■ The terminal can set the specific offset value through a higher layer parameter or can be set / instructed through the preamble part. The specific offset can be a time such as msec, or the number of OOK symbols or the number of OFDM symbols. For example, if the offset is set in OFDM symbol units, the opportunity of the preamble part and the opportunity of the message part can be determined as shown in FIG. 10.

[0094] [Method A1-3] The terminal can define or set the opportunity of the preamble part as A1-1 and / or A1-2, and based on this, can set / instruct or determine multiple opportunities (for transmitting the message part) corresponding to this.

[0095] ● The above multiple opportunities (for transmitting a message part) may mean opportunities for multiple LP-WUS message parts. That is, multiple LP-WUS message parts may be associated with one preamble part.

[0096] ● The above multiple opportunities (for transmitting message parts) may refer to opportunities for subparts when one LP-WUS message part (i.e., information transmitted for a specific terminal or a terminal (sub)group, or total information required to determine MR wake-up in the LP-WUR of a specific terminal) is received divided into multiple subparts. This separate transmission may be advantageous when the LP-WUS message part is too long.

[0097] ● The above multiple opportunities (for transmitting message parts) can be defined through upper layer parameters or configured in the terminal. Alternatively, the terminal can receive configuration / instruction regarding these multiple opportunities through the preamble part.

[0098] ● Embodiment 1: The terminal may receive multiple opportunities corresponding to (one) preamble part and related settings through upper layer parameters, or one or more of these may be set / instructed to the terminal through the preamble part based on the settings. For example, for multiple opportunities corresponding to each preamble part, a time offset from the preamble part to the first opportunity, an identical time offset between each opportunity, or a set of (independent) time offset values ​​between each opportunity may be set / instructed to the terminal through RRC, etc.

[0099] ● Example 2: The terminal can be configured with X (non-continuous) transmission patterns for the above-described multiple opportunities through higher layer parameters, and one (or more) of these can be indicated through the preamble part. For example, the base station associates Y opportunities per preamble. In addition, the base station configures X patterns, such as when the Y opportunities are repeated once every Z slots, once every 2*Z slots, etc. The terminal can be instructed with one of the X patterns set through the preamble part. In another example, when the terminal is configured to associate Y opportunities per preamble part, the position of each opportunity is set to X different bitmaps (for example, it can be set aperiodically, such as [1 0 0 1 1 0]), and the terminal can be instructed with one of these through the preamble part. X, Y, and Z can be configured / defined through higher layer parameters, etc.

[0100] [Method #A2] Setting up QCL relationships between LP-SS and LP-WUS (Preamble part, Message part)

[0101] [Method A2-1] The LP-SS and LP-WUS received by the terminal can be assumed or set to have the same QCL relationship.

[0102] ● The QCL source / reference for LP-SS and LP-WUS can be a specific DL signal / channel (e.g., SSB) received by MR (transmitted in the same Cell as the LP-SS or LP-WUS). The LP-SS includes a periodic LP-SS or an aperiodic LP-SS.

[0103] ■ At this time, the QCL source / reference may be one of the most recently successfully received SSBs (or SSB indices) before the terminal receives the LP-SS / LP-WUS. Or, it may be an SSB identified by the terminal during the most recent random access process.

[0104] ■ For example, LP-SS and LP-WUS have a QCL type D relationship, and the last SSB received (via MR) before LP-SS / LP-WUS is received among the SSBs transmitted to the corresponding cell can be the QCL source / reference for them.

[0105] ● LP-SS and LP-WUS may have the same QCL type for a specific QCL, and different QCL relationships for different QCL types. In this case, the QCL source / reference for LP-SS and LP-WUS may be a specific DL signal / channel (e.g., SSB) received by the terminal (MR) (for the same Cell as the LP-SS or LP-WUS). However, the QCL source / reference for LP-SS and LP-WUS may differ depending on the QCL type.

[0106] ■ For example, LP-SS and LP-WUS may have a QCL type A relationship with SSB, LP-SS may have a QCL type D relationship with SSB, and LP-WUS may have a QCL type D relationship with other NR signals / channels set / transmitted to the BWP of MR.

[0107] ● If the terminal receives the LP-WUS within N OOK or OFDM symbols from the LP-SS reception, these two signals have the same QCL relationship; otherwise, the terminal can be instructed of the QCL source / reference for the LP-WUS (or message part) via the LP-SS (or preamble part) (e.g., a specific SSB index, LP-SS index). N can be predetermined or set.

[0108] [Method A2-2] The preamble part and message part received by the terminal may have the same QCL relationship (QCL type X (X=A, B, C, D).

[0109] ● The QCL source / reference for the preamble part and message part can be LP-SS or SSB (transmitted in the same cell as the corresponding LP-WUS). In this case, LP-SS includes periodic LP-SS or aperiodic LP-SS. (If the LP-SS has a long period) The QCL source / reference can be the most recently received LP-SS before the LP-WUS is received by the terminal.

[0110] ■ For example, the preamble part / message part has a QCL type A relationship, and the periodic LP-SS transmitted in the corresponding cell can be used as a QCL source / reference for them.

[0111] ■ When SSB is used as a QCL source / reference, the most recently received SSB (by MR) may be used. Alternatively, the SSB identified by the terminal during the most recent random access process may be used.

[0112] ● If the message part is received within N OOK or OFDM symbols from the time the terminal receives the preamble part, the preamble part and the message part are determined to have the same QCL relationship. Otherwise, the terminal can be indicated a QCL source / reference (e.g., a specific SSB index, LP-SS index) through the preamble part. N can be predetermined or set.

[0113] [Method A2-3] Multiple message parts (or multiple subparts for a single message part) associated with one preamble part can have the same QCL relationship (QCL type X (X=A, B, C, D).

[0114] ● The QCL source / reference for the plurality of message parts (or subparts) may be a preamble part associated with the message part (or subpart). Alternatively, the QCL source / reference for the plurality of message parts (or subparts) may be the most recently received LP-SS or SSB before the message part (or subpart) is received.

[0115] ■ For example, the above multiple message parts (or sub-parts) have a QCL type D relationship, and the preamble part associated with them or the last received preamble part can be used as a QCL source / reference for them.

[0116] ■ When SSB is used as a QCL source / reference, the most recently received SSB (by MR) can be used as the QCL source / reference. Alternatively, the SSB identified by the terminal during the most recent random access process can become the QCL source / reference.

[0117] ● Alternatively, for receiving N message parts (or subparts), the first message part (or subpart) can be the QCL source / reference for the remaining N-1 parts. Alternatively, the same QCL relationship is assumed for N message parts (or subparts). The QCL source / reference for these can be the (associated) preamble part, the LP-SS, or the SSB transmitted in the corresponding cell.

[0118] ● If the terminal receives a specific / some message part (or sub-part) within N OOK or OFDM symbols from the time the terminal receives the preamble part, the same QCL relationship can be assumed between the preamble part and the message part. Otherwise, the terminal can be indicated a QCL source / reference (e.g., a specific SSB index, LP-SS index) through the preamble part. N can be predetermined or set.

[0119] 2) Transmitter (Entity B):

[0120] [Method #B1] How to set / transmit the preamble part / message part as a separate opportunity

[0121] [Method B1-1] The base station can separately define or set the opportunity of the preamble part and message part that constitute the LP-WUS. The setting method at this time may be a higher layer parameter (e.g., RRC, SIB(1)). Alternatively, it may be distinguished according to the RRC mode / state of the terminal. For example, for a connected mode terminal, the opportunity is set / indicated through RRC, and for an idle / inactive mode terminal, the opportunity is set / indicated through SIB1. The following method may be used as an example of this embodiment.

[0122] ● Example 1: The opportunities for the preamble part and the message part are set through upper layer parameters.

[0123] ● Example 2: Setting / defining the minimum time interval between opportunities in the preamble part and the message part

[0124] ■ In this case, the base station may need to set the distance between the opportunities of the preamble part and the message part so that it is not less than the minimum interval mentioned above. Alternatively, the base station may not expect any subsequent action from the terminal in response to the transmission of LP-WUS for opportunities of the preamble part or message part that do not satisfy the minimum interval mentioned above.

[0125] ■ The above minimum interval may be the interval between the last OOK / OFDM symbol of the preamble part (or message part) and the first OOK / OFDM symbol of the message part (or preamble part), or the interval between the first OOK / OFDM symbols of each part.

[0126] ■ The base station can set the above minimum interval through a higher layer parameter or set / indicate it through a preamble part. The above minimum interval can be a time such as msec, or the number of OOK symbols or OFDM symbols.

[0127] ● Example 3: If the base station sets a periodic LP-SS, the minimum interval value may change depending on the LP-SS cycle. For example, the base station may set the minimum interval for each cycle of the LP-SS through a higher layer parameter. Alternatively, the base station may set the minimum interval for each cycle and expect the terminal to apply an additional offset (which may be set / defined through a higher layer parameter) proportional to each cycle.

[0128] ■ If the base station does not set up (periodic) LP-SS, the terminal may use a specific value (e.g., zero) as the minimum interval and additional values.

[0129] [Method B1-2] The base station can set or define the opportunity of the preamble part (or message part) as in Method B1-1, and determine the opportunity of the message part (or preamble part) based on this.

[0130] ● Example 1: The base station sets the opportunity of the preamble part, and the opportunity of the message part can be determined to include the length of the message part (with or without CRC) from the earliest OOK / OFDM symbol after the end point of the preamble part (e.g., the last OOK / OFDM symbol).

[0131] ● Example 2: The base station sets the opportunity of the message part, and the opportunity of the preamble part can be determined so that the latest OOK / OFDM symbol before the start point of the message part (e.g., the first OOK / OFDM symbol) becomes the last OOK / OFDM symbol of the preamble part.

[0132] ● Example 3: After the base station sets the opportunity of the preamble part, the opportunity of the message part can be determined such that the end point of the preamble part (e.g., the last OOK / OFDM symbol) has a specific time offset from the first (or last) OOK / OFDM symbol of the message part (with or without CRC).

[0133] ● Example 4: The base station sets the opportunity of the message part, and the opportunity of the preamble part can be determined so that the starting point of the message part (e.g., the first OOK / OFDM symbol) has a specific time offset from the last (or first) OOK / OFDM symbol of the preamble part.

[0134] ● Example 5: When the base station sets a periodic LP-SS, the time offset value may change according to the LP-SS period. For example, the base station may set the time offset for each period of the LP-SS through a higher layer parameter. Alternatively, the base station may set the time offset for each period and apply an additional time offset (which may be set / defined through a higher layer parameter) proportional to each period.

[0135] ■ If (periodic) LP-SS is not set, a specific value (e.g., zero) can be applied to the above offset.

[0136] ■ Embodiment 1 or Embodiment 3 can operate in the same manner as in Fig. 8.

[0137] ■ The base station can set the specific offset value through a higher layer parameter or set / indicate it through a preamble part. The specific offset can be a time such as msec, or the number of OOK symbols or the number of OFDM symbols. For example, if the base station sets / defines the offset in OFDM symbol units, the opportunity of the preamble part and the opportunity of the message part can be determined as shown in FIG. 10.

[0138] [Method B1-3] The base station can set or define the opportunity of the preamble part as B1-1 and / or B1-2, and set / instruct / determine multiple opportunities (for transmitting the message part) corresponding thereto.

[0139] ● The above multiple opportunities (for transmitting a message part) may mean opportunities for multiple LP-WUS message parts. That is, multiple LP-WUS message parts may be associated with one preamble part.

[0140] ● The above multiple opportunities (for transmitting message parts) may refer to opportunities for subparts when one LP-WUS message part (i.e., information transmitted for a specific terminal or terminal (sub)group, or total information required to determine MR wake-up in LP-WUR of a specific terminal) is divided into multiple subparts and transmitted. This separate transmission may be advantageous when the LP-WUS message part is too long.

[0141] ● The above multiple opportunities (for transmitting the message part) can be defined through upper layer parameters or configured in the terminal. Alternatively, the base station can configure / instruct these multiple opportunities through the preamble part.

[0142] ● Example 1: The base station can configure multiple opportunities corresponding to (one) preamble part and related settings through upper layer parameters, or instruct one or more of these to the terminal through the preamble part based on the settings. For example, for multiple opportunities corresponding to each preamble part, the base station can configure / instruct a time offset from the preamble part to the first opportunity, an identical time offset between each opportunity, or a set of (independent) time offset values ​​between each opportunity, through RRC, etc.

[0143] ● Example 2: The base station can be configured with X (non-continuous) transmission patterns for opportunities through higher layer parameters, and can indicate one (or more) of them through the preamble part. For example, the base station associates Y opportunities per preamble. In addition, the base station configures X patterns, such as when the Y opportunities are repeated once every Z slots, once every 2*Z slots, etc. The base station can indicate one of the X patterns to the terminal through the corresponding preamble part. As another example, when the base station configures Y opportunities to be associated per preamble part, the location of each opportunity can be set to X different bitmaps (for example, it can be set aperiodically, such as [1 0 0 1 1 0]), and one of them can be indicated to the terminal through the corresponding preamble part. The base station can set / define X, Y, and Z through higher layer parameters, etc.

[0144] [Method #B2] Setting up QCL relationships between LP-SS and LP-WUS (Preamble part, Message part)

[0145] [Method B2-1] The LP-SS and LP-WUS transmitted by the base station can be assumed or set to have the same QCL relationship.

[0146] ● The QCL source / reference for LP-SS and LP-WUS can be a specific DL signal / channel (e.g., SSB) received by MR (transmitted in the same Cell as the corresponding LP-SS or LP-WUS). The LP-SS includes a periodic LP-SS or an aperiodic LP-SS.

[0147] ■ At this time, the QCL source / reference may be one of the most recently successfully received SSBs (or SSB indices) before the terminal receives the LP-SS / LP-WUS. Or, it may be an SSB identified by the terminal during the most recent random access process.

[0148] ■ For example, LP-SS and LP-WUS have a QCL type D relationship, and the last SSB received (via MR) before LP-SS / LP-WUS is received among the SSBs transmitted to the corresponding cell can be the QCL source / reference for them.

[0149] ● LP-SS and LP-WUS may have the same QCL type for a specific QCL type, and different QCL relationships for other specific QCL types. In this case, the QCL source / reference for LP-SS and LP-WUS may be a specific DL signal / channel (e.g., SSB) transmitted by the base station to the MR of the terminal (for the same cell as the LP-SS or LP-WUS). However, the QCL source / reference of LP-SS and LP-WUS may differ depending on the QCL type.

[0150] ● For example, LP-SS and LP-WUS may have a QCL type A relationship with SSB, LP-SS may have a QCL type D relationship with SSB, and LP-WUS may have a QCL type D relationship with other NR signals / channels set / transmitted to the BWP of MR.

[0151] If the base station transmits the LP-WUS within N OOK or OFDM symbols from the time of transmitting the LP-SS, these two signals have the same QCL relationship. Otherwise, the base station can indicate the QCL source / reference for the LP-WUS (or message part) through the LP-SS (or preamble part) (e.g., a specific SSB index, LP-SS index). N can be predetermined or set.

[0152] [Method B2-2] The preamble part and message part transmitted by the base station can have the same QCL relationship (QCL type X (X=A, B, C, D)).

[0153] ● The QCL source / reference for the preamble part and message part can be LP-SS or SSB (transmitted in the same cell as the corresponding LP-WUS). In this case, LP-SS includes periodic LP-SS or aperiodic LP-SS. (If the LP-SS has a long period) The QCL source / reference can be the most recently transmitted LP-SS before the LP-WUS is transmitted.

[0154] ■ For example, the preamble part / message part has a QCL type A relationship, and the periodic LP-SS transmitted in the corresponding cell can be used as a QCL source / reference for them.

[0155] ■ When SSB is used as a QCL source / reference, the most recently transmitted SSB (to MR) may be used. Alternatively, the SSB identified by the terminal during the most recent random access process may be used.

[0156] ● If the base station transmits the message part within N OOK or OFDM symbols from the time the base station transmits the preamble part, the preamble part and the message part are considered to have the same QCL relationship. Otherwise, the base station can indicate the QCL source / reference through the preamble part (e.g., a specific SSB index, LP-SS index). N can be predetermined or set.

[0157] [Method B2-3] Multiple message parts (or multiple subparts for a single message part) associated with one preamble part can have the same QCL relationship (QCL type X (X=A, B, C, D).

[0158] ● The QCL source / reference for the plurality of message parts (or subparts) may be a preamble part associated with the message part (or subpart). Alternatively, the QCL source / reference for the plurality of message parts (or subparts) may be the LP-SS or SSB that was most recently transmitted before the message part (or subpart) was transmitted.

[0159] ■ For example, the above multiple message parts (or sub-parts) have a QCL type D relationship, and the preamble part associated with them or the last transmitted preamble part can be used as a QCL source / reference for them.

[0160] ■ When SSB is used as a QCL source / reference, the most recently transmitted SSB (to MR) can be used. Alternatively, the SSB identified by the terminal during the most recent random access process can become the QCL source / reference.

[0161] ● Alternatively, for transmission of N message parts (or subparts), the first message part (or subpart) can be the QCL source / reference for the remaining N-1 parts. Alternatively, the same QCL relationship is assumed for N message parts (or subparts). The QCL source / reference for these can be the (associated) preamble part, the LP-SS, or the SSB transmitted in the corresponding cell.

[0162] If the base station transmits a specific / partial message part (or subpart) within N OOK or OFDM symbols starting from the time the base station transmits the preamble part, the same QCL relationship can be assumed between the preamble part and the message part. Otherwise, the base station can indicate the QCL source / reference (e.g., a specific SSB index, LP-SS index) through the preamble part. N can be predetermined or configured.

[0163] Meanwhile, the present invention is not limited to the transmission and reception of uplink and / or downlink signals. For example, the present invention can also be used in direct communication between terminals. Furthermore, the base station in the present invention may include not only a base station but also a relay node. For example, the base station operations in the present invention may be performed by the base station, but may also be performed by a relay node.

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

[0165] A-IoT could be a new type / segment of devices that operate solely on energy harvested from the surrounding environment. For example, A-IoT could refer to a new type of Internet of Things device that is powered by various energy sources harvested from the surrounding environment, such as radio waves, light, motion, and heat.

[0166] For example, active signal generation and / or backscattering may be among the communication technologies considered to achieve low-power operation of A-IoT devices. For example, backscattering is a technique widely used in radio frequency identification (RFID), which allows devices 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 the incident RF signal or by stored energy.

[0167] For example, IoT devices can be classified into various device types, such as passive, semi-passive, and active, depending on how they store energy and generate transmission signals. 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 help of the energy storage device. For example, an active device has an energy storage device and can actively generate signals using active RF components and the stored energy to communicate. For example, in the present disclosure, the following three types of IoT devices can be considered. For example, device A can be a device without energy storage and without independent signal generation (e.g., a device that supports backscatter transmission). For example, device B can be a device with energy storage and without independent signal generation (e.g., a device that supports backscatter transmission). In this case, for example, the use of stored energy may involve 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, the basic topologies may include direct connections between base stations and A-IoT devices, connections between base stations and intermediate nodes and A-IoT devices, connection support by auxiliary nodes, and / or connections between terminals and A-IoT devices. The basic topologies proposed in this disclosure are merely examples, and the proposals in this disclosure may be extended / applied to other topologies.

[0169] A-IoT devices can be categorized into two types: Type 1 devices, which have a maximum power consumption of approximately 1 uW, are capable of storing energy, do not have an amplification function, and can transmit by backscattering a carrier wave (CW) provided from an external source (e.g., a reader such as a base station or a terminal, or a separate node). Type 2 devices, for example, have a maximum power consumption of approximately several hundred uW, are capable of storing energy, are capable of amplification, and can transmit by backscattering a carrier wave (CW) provided from an external source (e.g., a reader such as a base station or a terminal, or a separate node) or by using a signal generated internally.

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

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

[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 can perform operations such as initial connection or data transmission / reception through LR instead of triggering (or activating) MR.

[0173] It is clear that the examples of the proposed methods described above can also be considered as a type of proposed methods, as they can be included as one of the implementation methods of the present invention. In addition, the proposed methods described above can be implemented independently, but can also be implemented in the form of a combination (or merge) of some of the proposed methods. Information on whether the proposed methods are applicable (or information on the rules of the proposed methods) can be defined by a rule so that the base station notifies the terminal or the transmitting terminal notifies the receiving terminal through a predefined signal (e.g., a physical layer signal or a higher layer signal).

[0174] Implementation example

[0175] Figure 11 is a flowchart of a signal transmission and reception method according to embodiments of the present invention.

[0176] Referring to FIG. 11, a signal transmission and reception method according to an embodiment of the present invention may be performed by a terminal and may include a step (S501) of receiving a signal through a first receiver, and a step (S503) of performing a specific operation based on the reception of the signal.

[0177] The specific action may be an action by which the terminal triggers a second receiver. Alternatively, if the terminal is an A-IoT device, the action may be an action by which the terminal transmits a response signal based on the signal.

[0178] The above signal may be an LP-SS and / or LP-WUS as described in the present specification. Even if expressed by another name, if the signal is a signal for triggering the operation of another receiver based on the signal being received by a specific receiver or a signal received by an A-IoT device, it may correspond to the LP-WUS of the present specification. In addition, even if expressed by another name, if the signal is a signal for synchronizing the LP-WUS, it may correspond to the LP-WUS of the present specification.

[0179] The first receiver corresponds to a separate receiver for receiving LP-WUS (i.e., LP-WUR), and the second receiver corresponds to a main receiver (i.e., MR). The specific names may be changed from LP-WUR and MR, but 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 of a communication system other than an NR system, if it is a receiver that is triggered based on the reception of a signal from another receiver that consumes relatively less power, it may correspond to the main receiver.

[0180] However, in the case of an A-IoT device, only the first receiver among the first and second receivers may be included.

[0181] In addition to the basic operations of Figure 11, the operations described for entities A and B can be combined.

[0182] Figure 12 is a flowchart that further concretizes a signal transmission and reception method according to an embodiment of the present invention.

[0183] Referring to FIG. 12, a signal transmission and reception method from a terminal perspective according to an embodiment of the present invention may be configured to include a step (S1203) of receiving an LP-WUS after receiving an LP-SS through a first receiver, and a step (S1204) of operating a second receiver that has been stopped based on the reception of the LP-WUS. A signal transmission and reception method from a base station perspective according to an embodiment of the present invention may be configured to include a step (S1201) of setting a QCL relationship between an LP-SS and an LP-WUS, and a step (1202) of transmitting an LP-WUS after transmitting an LP-SS based on the QCL relationship.

[0184] The QCL relationships of LP-SS and LP-WUS can be determined based on Method #A2 and / or Method #B2.

[0185] For example, referring to Method A2-1 and Method B2-1, the signal for which a QCL relationship with the LP-SS and / or LP-WUS is assumed or established may be a specific downlink signal / channel received via the second receiver of the terminal. For example, the signal for which a QCL relationship with the LP-SS and / or LP-WUS is assumed or established may be an SSB. Accordingly, the base station may transmit the LP-SS and / or LP-WUS after establishing the LP-SS and / or LP-WUS in a QCL relationship with the SSB. The terminal may explicitly receive information about the SSB to be established in a QCL relationship with the LP-SS and / or LP-WUS, or may assume that the LP-SS and / or LP-WUS is in a QCL relationship with a specific SSB and receive the LP-SS and / or LP-WUS. When the terminal explicitly receives information about the SSB to be set to QCL relationship with LP-SS and / or LP-WUS, the setting of S1201 may be transmitted to the terminal.

[0186] The specific SSB may be the last received SSB before reception of the LP-SS and LP-WUS. Since the SSB is received through the secondary receiver of the terminal, the last SSB received before the secondary receiver stops operating may be assumed to have a QCL relationship with the LP-SS and / or LP-WUS as the specific SSB. Alternatively, the specific SSB may be an SSB identified by the terminal during a random access process between the base station and the terminal before the secondary receiver stops operating and may be assumed to have a QCL relationship with the LP-SS and / or LP-WUS. Alternatively, the specific SSB may be set as an SSB of a specific index through RRC signaling or SIB.

[0187] LP-SS and / or LP-WUS being set in a QCL relationship with SSB has the following advantages:

[0188] - The first receiver monitoring LP-WUS performs initial rough time / frequency synchronization via LP-SS or SSB. The first receiver capable of only detecting OOK signals performs synchronization via LP-SS, and the first receiver capable of detecting OFDM sequences can perform synchronization via SSB. In addition, the first receiver monitoring LP-WUS performs RRM measurement via LP-SS or SSB. The first receiver monitoring LP-SS performs RRM measurement via LP-SS, and the first receiver not monitoring LP-SS performs RRM measurement via SSB. In the case of a terminal where the second receiver and the first receiver operate at different frequencies, synchronization and RRM measurement can be performed via LP-SS (at the frequency at which LP-WUS is transmitted). In this way, since SSB can be used as a synchronization signal for LP-WUS reception, the QCL relationship with SSB can be advantageous.

[0189] - When a terminal in idle / inactive mode receives a wake-up instruction with LP-WUS, the second receiver wakes up and can monitor PO (Paging Occasion) or PEI (Paging Early Indication). PO or PEI can establish a QCL relationship with SSB. When a connected mode terminal receives a trigger for PDCCH monitoring with LP-WUS, the first receiver wakes up and monitors PDCCH. PDCCH can establish a QCL relationship with SSB or CSI-RS. In this way, since SSB often establishes a QCL relationship with signals that need to be monitored after receiving LP-WU, a QCL relationship with SSB can be advantageous.

[0190] - For multi-beam operation, the terminal can determine the optimal reception beam among SSBs transmitted through multiple beams. When LP-WUS / LP-SS operates based on multi-beam, LP-WUS / LP-SS can be received through the optimal reception beam. Therefore, LP-WUS / LP-SS operating in multi-beam needs to acquire information about SSB and spatial domain, which can be indicated by the corresponding QCL type D setting. Therefore, the information already acquired can be utilized for multi-beam operation.

[0191] Additionally, the QCL relationship may be set differently depending on the time interval between the LP-SS and LP-WUS. If the base station transmits an LP-SS and transmits an LP-WUS within a time interval that is less than (or equal to) a threshold, the base station may set the LP-WUS to a QCL relationship with the LP-SS. If the terminal receives an LP-SS and receives an LP-WUS within a time interval that is less than (or equal to) a threshold, the terminal may assume that the LP-WUS is in a QCL relationship with the LP-SS.

[0192] When a base station transmits an LP-SS and then transmits an LP-WUS after a time interval exceeding (or equal to) a threshold value, the base station can set a QCL relationship between the signal and the LP-WUS based on the information previously transmitted through the LP-SS. When a terminal receives an LP-SS and then receives an LP-WUS after a time interval exceeding (or equal to) a threshold value, the terminal can set a signal in a QCL relationship with the LP-WUS based on the information received through the LP-SS.

[0193] Signals for which a QCL relationship is assumed or established with LP-SS and / or LP-WUS can be CSI-RS, TRS (tracking RS), etc. in addition to SSB.

[0194] A QCL relationship can be assumed or established for a specific type. For example, a QCL relationship can be assumed or established for one or more of QCL types A to D. As a specific example, the QCL types for which a QCL relationship is assumed or established between LP-SS and / or LP-WUS and SSB are some of the four types, and a QCL relationship may not be assumed or established for the remaining types among the four types.

[0195] Additionally, based on Method #A1 and Method #B1, FIGS. 8 to 10, the LP-WUS can be configured to include a preamble part and a message part. The base station can establish a QCL relationship between the preamble part and the message part and transmit the LP-WUS. The terminal can receive the LP-WUS assuming that there is a QCL relationship between the preamble part and the message part.

[0196] The preamble and message parts of LP-WUS can be transmitted at different time intervals, and the QCL relationship can be set differently depending on the time interval. If the base station transmits the preamble part and transmits the message part within a time interval that is less than (or equal to) a threshold, the base station can set the message part to a QCL relationship with the preamble part. If the terminal receives the preamble part and receives the message part within a time interval that is less than (or equal to) a threshold, the terminal can assume the message part to be in a QCL relationship with the preamble part.

[0197] When a base station transmits a preamble part and then transmits a message part after a time interval exceeding (or equal to) a threshold value has elapsed, the base station can establish a QCL relationship between the signal and the message part based on the information previously transmitted through the preamble part. When a terminal receives a message part after a time interval exceeding (or equal to) a threshold value has elapsed after receiving the preamble part, the terminal can establish a QCL relationship between the signal and the message part based on the information received through the preamble part.

[0198] Additionally, transmission / reception opportunities for the preamble part and the message part may be set according to Method #A1 and Method #B1. Furthermore, an offset related to the time interval between transmission opportunities may be set according to Method #A1 and Method #B1.

[0199] Examples of communication systems to which the present invention is applied

[0200] Although not limited thereto, the various descriptions, functions, procedures, proposals, methods and / or operational flowcharts of the present invention disclosed in this document may be applied to various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0201] Hereinafter, more specific examples will be provided with reference to the drawings. In the drawings / descriptions below, the same drawing reference numerals may represent identical or corresponding hardware blocks, software blocks, or functional blocks, unless otherwise described.

[0202] Figure 13 illustrates a communication system (1) applied to the present invention.

[0203] Referring to FIG. 13, a communication system (1) applied to the present invention includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) 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 Things) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, and can be implemented in the form of HMD (Head-Mounted Device), HUD (Head-Up Display) installed in a vehicle, television, smartphone, computer, wearable device, home appliance, digital signage, vehicle, robot, etc. Mobile devices can include smartphone, smart pad, wearable device (e.g., smart watch, smart glass), computer (e.g., laptop, etc.), etc. Home appliances can include TV, refrigerator, washing machine, etc. IoT devices can include sensors, smart meters, etc. For example, base stations and networks can also be implemented as wireless devices, and a specific wireless device (200a) can act as a base station / network node to other wireless devices.

[0204] Wireless devices (100a to 100f) can be connected to a network (300) via a base station (200). Artificial Intelligence (AI) technology can 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, a 5G (e.g., NR) network, etc. The wireless devices (100a to 100f) can communicate with each other via the base station (200) / network (300), but can also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). In addition, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0205] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base stations (200), and base stations (200) / base stations (200). Here, wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR) such as uplink / downlink communication (150a), sidelink communication (150b) (or D2D communication), and communication between base stations (150c) (e.g., relay, IAB (Integrated Access Backhaul). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes can be performed based on various proposals of the present invention.

[0206] Examples of wireless devices to which the present invention is applied

[0207] Figure 14 illustrates a wireless device applicable to the present invention.

[0208] Referring to FIG. 14, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} can correspond to {the wireless device (100x), the base station (200)} and / or {the wireless device (100x), the wireless device (100x)} of FIG. 13.

[0209] A first wireless device (100) includes one or more processors (102) and one or more memories (104), and may further include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memories (104) and / or the transceivers (106), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (102) may process information in the memory (104) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (106). In addition, the processor (102) may receive a wireless signal including second information / signal via the transceiver (106), and then store information obtained from signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals via one or more antennas (108). The transceiver (106) may include a transmitter and / or a receiver. The transceiver (106) may be used interchangeably with an RF (Radio Frequency) unit. In the present invention, a wireless device may also mean a communication modem / circuit / chip.

[0210] The second wireless device (200) includes one or more processors (202), one or more memories (204), and may further include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memories (204) and / or the transceivers (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers (206). Furthermore, the processor (202) may receive a wireless signal including fourth information / signals via the transceivers (206), and then store information obtained from signal processing of the fourth information / signals in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may perform some or all of the processes controlled by the processor (202), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via one or more antennas (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF unit. In the present invention, a wireless device may also mean a communication modem / circuit / chip.

[0211] Hereinafter, the 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 PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed herein, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) can receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed herein.

[0212] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a 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 descriptions, functions, procedures, proposals, methods, and / or operational flowcharts 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. The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software configured to perform one or more processors (102, 202) or stored in one or more memories (104, 204) and executed by one or more processors (102, 202). The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.

[0213] One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories (104, 204) may be configured as ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories (104, 204) may be located internally and / or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0214] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or flowcharts of this document, to one or more other devices. One or more transceivers (106, 206) can receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of this document, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, one or more processors (102, 202) can 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 coupled to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, or the like, as referred to in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein, via 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 received user data, control information, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202).One or more transceivers (106, 206) may convert user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.

[0215] Examples of wireless devices to which the present invention is applied

[0216] Figure 15 illustrates another example of a wireless device applicable to the present invention. The wireless device may be implemented in various forms depending on the use case / service (see Figure 13).

[0217] Referring to FIG. 15, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 14 and may be composed of various elements, components, units / units, 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 element (140). The communication unit may include a communication circuit (112) and a transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 14. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 14. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and the additional elements (140) and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit (130). In addition, the control unit (120) may transmit information stored in the memory unit (130) to an external device (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from an external device (e.g., another communication device) via a wireless / wired interface in the memory unit (130).

[0218] The additional element (140) may be configured in various ways depending on the type of the wireless device. For example, the additional element (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. 13, 100a), a vehicle (Fig. 13, 100b-1, 100b-2), an XR device (Fig. 13, 100c), a portable device (Fig. 13, 100d), a home appliance (Fig. 13, 100e), an IoT device (Fig. 13, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or a financial device), a security device, a climate / environmental device, an AI server / device (Fig. 13, 400), a base station (Fig. 13, 200), a network node, etc. Wireless devices may be mobile or stationary depending on the use / service.

[0219] In FIG. 15, 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 some may be wirelessly 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 wired, and the control unit (120) and a first unit (e.g., 130, 140) may be wirelessly connected via the communication unit (110). In addition, each element, component, unit / part, and / or module within the wireless device (100, 200) may further include one or more elements. For example, the control unit (120) may be composed of a set of one or more processors. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, 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, volatile memory, non-volatile memory, and / or a combination thereof.

[0220] Examples of vehicles or autonomous vehicles to which the present invention is applied

[0221] Figure 16 illustrates a vehicle or autonomous vehicle applicable to the present invention. The vehicle or autonomous vehicle may be implemented as a mobile robot, a car, a train, a manned or unmanned aerial vehicle (AV), a ship, or the like.

[0222] Referring to FIG. 16, a vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a driving unit (140a), a power supply unit (140b), a sensor unit (140c), and an autonomous driving unit (140d). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 of FIG. 8, respectively.

[0223] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, road side units, etc.), and servers. The control unit (120) can control elements of the vehicle or autonomous vehicle (100) to perform various operations. The control unit (120) can include an ECU (Electronic Control Unit). The drive unit (140a) can drive the vehicle or autonomous vehicle (100) on the ground. The drive unit (140a) can include an engine, a motor, a power train, wheels, brakes, a steering device, etc. The power supply unit (140b) supplies power to the vehicle or autonomous vehicle (100) and can include a wired / wireless charging circuit, a battery, etc. The sensor unit (140c) can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit (140c) may include an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an incline sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit (140d) may implement a technology for maintaining a driving lane, a technology for automatically controlling speed such as adaptive cruise control, a technology for automatically driving along a set path, a technology for automatically setting a path and driving when a destination is set, etc.

[0224] For example, the communication unit (110) can receive map data, traffic information data, etc. from an external server. The autonomous driving unit (140d) can generate an autonomous driving route and driving plan based on the acquired data. The control unit (120) can control the drive unit (140a) so that the vehicle or autonomous vehicle (100) moves along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit (110) can irregularly / periodically acquire the latest traffic information data from an external server and can acquire surrounding traffic information data from surrounding vehicles. In addition, during autonomous driving, the sensor unit (140c) can acquire vehicle status and surrounding environment information. The autonomous driving unit (140d) can update the autonomous driving route and driving plan based on newly acquired data / information. The communication unit (110) can transmit information regarding the vehicle location, autonomous driving route, driving plan, etc. to the external server. External servers can predict traffic information data in advance using AI technology or other technologies based on information collected from vehicles or autonomous vehicles, and provide the predicted traffic information data to the vehicles or autonomous vehicles.

[0225] It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the scope of the invention. Therefore, the above detailed description should not be construed as limiting in any respect, but rather as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of equivalents of the present invention are intended to be included within the scope of the present invention.

[0226] As described above, the present invention can be applied to various wireless communication systems.

Claims

1. In a method performed by a terminal in a wireless communication system, A step of receiving a LP-WUS (Low Power-Wake Up Signal) after receiving a LP-SS (Low Power-Synchronization Signal) through the first receiver of the terminal; and A step of operating a second receiver of the terminal that has been stopped based on reception of the LP-WUS; The above LP-SS or the above LP-WUS is assumed to have a QCL (Quasi-Co-Location) relationship with a specific downlink signal received through the second receiver before the operation is interrupted. method.

2. In paragraph 1, The above specific downlink signal is SSB (Synchronization Signal / physical broadcast channel Block). method.

3. In paragraph 2, The above SSB is the last SSB received before the operation is interrupted. method.

4. In paragraph 2, The above SSB is an SSB identified by the terminal during a random access process of the terminal before the operation is interrupted. method.

5. In paragraph 2, The above SSB is an SSB set by RRC (radio resource control) signaling or SIB (system information block). method.

6. In paragraph 1, The above QCL relationship is assumed for a specific QCL type, method.

7. In paragraph 1, If the time interval between the LP-SS and the LP-WUS is less than or equal to a threshold value, the LP-WUS is assumed to have a QCL relationship with the LP-SS, If the above time interval exceeds the threshold, the signal having a QCL relationship with the LP-WUS is set based on the information received through the LP-SS. method.

8. In paragraph 1, The above LP-WUS (low power wake-up signal) includes a preamble part and a message part. method.

9. In paragraph 8, The above preamble part and the above message part are assumed to have a QCL relationship, method.

10. In paragraph 9, If the time interval between the preamble part and the message part is less than or equal to a threshold value, the message part is assumed to have a QCL relationship with the preamble part, If the above time interval exceeds the threshold, the signal having a QCL relationship with the message part is set based on the information received through the preamble part. method.

11. In paragraph 1, The above LP-SS is set as a periodic signal or an aperiodic signal. method.

12. In a terminal operating in a wireless communication system, First receiver and second receiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform a specific operation; The above specific actions are: A step of receiving a LP-WUS (Low Power-Wake Up Signal) after receiving a LP-SS (Low Power-Synchronization Signal) through the first receiver; and A step of operating the second receiver that has been stopped based on reception of the LP-WUS; The above LP-SS or the above LP-WUS is assumed to have a QCL (Quasi-Co-Location) relationship with a specific downlink signal received through the second receiver before the operation is interrupted. Terminal.

13. In a device for a terminal, at least one processor; and At least one computer memory operably connected to said at least one processor and configured to, when executed, cause said at least one processor to perform operations, said operations comprising: A step of receiving a LP-WUS (Low Power-Wake Up Signal) after receiving a LP-SS (Low Power-Synchronization Signal) through the first receiver of the terminal; and A step of operating a second receiver of the terminal that has been stopped based on reception of the LP-WUS; The above LP-SS or the above LP-WUS is assumed to have a QCL (Quasi-Co-Location) relationship with a specific downlink signal received through the second receiver before the operation is interrupted. device.

14. A computer-readable non-volatile storage medium comprising at least one computer program that causes a terminal including at least one processor to perform an operation, the operation comprising: A step of receiving a LP-WUS (Low Power-Wake Up Signal) after receiving a LP-SS (Low Power-Synchronization Signal) through the first receiver of the terminal; and A step of operating a second receiver of the terminal that has been stopped based on reception of the LP-WUS; The above LP-SS or the above LP-WUS is assumed to have a QCL (Quasi-Co-Location) relationship with a specific downlink signal received through the second receiver before the operation is interrupted. Storage media.

15. In a method performed by a base station in a wireless communication system, A step of setting the QCL relationship of the LP-SS (Low Power-Synchronization Signal) and the LP-WUS (Low Power-Wake Up Signal) for the first receiver of the terminal; and Based on the above QCL relationship, a step of transmitting the LP-WUS after transmitting the LP-SS; The above LP-SS or the LP-WUS is set to have a QCL (Quasi-Co-Location) relationship with a specific downlink signal transmitted to the second receiver of the terminal. method.

16. In a base station operating in a wireless communication system, At least one transceiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform a specific operation; The above specific actions are: A step of setting the QCL relationship of the LP-SS (Low Power-Synchronization Signal) and the LP-WUS (Low Power-Wake Up Signal) for the first receiver of the terminal; and Based on the above QCL relationship, a step of transmitting the LP-WUS after transmitting the LP-SS; The above LP-SS or the LP-WUS is set to have a QCL (Quasi-Co-Location) relationship with a specific downlink signal transmitted to the second receiver of the terminal. Base station.

Images