Method and apparatus for transmitting and receiving a signal in a wireless communication system

Abstract

The superposition sequence can be used for each symbol in the LP-WUS and / or the LP-SS received by the low-power receiver at the terminal in the wireless communication system. The superposition sequence for the LP-WUS and / or the LP-SS can or can not include information about the LP-WUS and / or the LP-SS. If the superposition sequence includes information about the LP-WUS and / or the LP-SS, the superposition sequence is selected as one of a plurality of candidate sequences. If the superposition sequence does not include information about the LP-WUS and / or the LP-SS, the superposition sequence is determined as a predetermined single sequence.

Description

Technical Field

[0001] This disclosure relates to a method and apparatus for use in a wireless communication system. Background Technology

[0002] Wireless communication systems are typically being developed to cover a wide range of diverse areas to provide communication services such as audio communication and data communication. Wireless communication is a multiple access system capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power). For example, multiple access systems can include one of the following: 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). Summary of the Invention

[0003] Technical issues

[0004] The purpose of this disclosure is to provide a signal transmission and reception method and apparatus for efficiently transmitting and receiving reference signals in a wireless communication system.

[0005] Those skilled in the art will understand that the purposes achievable by using this disclosure are not limited to those specifically described above, and that the above and other purposes achievable by this disclosure will become clearer from the following detailed description.

[0006] Technical solution

[0007] This disclosure provides a method and apparatus for transmitting and receiving signals in a wireless communication system.

[0008] In one aspect of this disclosure, a method performed by a user equipment (UE) in a wireless communication system includes the following steps: receiving a low-power wake-up signal (LP-WUS) through a first receiver of the UE, and receiving a second receiver of the UE based on the LP-WUS, wherein an overlay sequence for the LP-WUS is used, the overlay sequence is configured to include information related to the LP-WUS, each overlay sequence is configured as a candidate sequence among a plurality of candidate sequences, and the candidate sequences are sequences based on different root sequence indices or different cyclic shift values, and the overlay sequence is configured not to include information related to the LP-WUS, each overlay sequence is configured as a predetermined single sequence, and the single sequence is a predetermined specific sequence among a plurality of candidate sequences.

[0009] In another aspect of this disclosure, a UE, a processor, and a storage medium are provided for performing signal transmission and reception methods.

[0010] In another aspect of this disclosure, a method performed by a base station (BS) in a wireless communication system includes the steps of: determining, for a first receiver of a user equipment (UE), a superimposed sequence for a low-power wake-up signal (LP-WUS); and transmitting the LP-WUS based on the superimposed sequence, wherein the superimposed sequence is configured to include information related to the LP-WUS, each superimposed sequence is configured as a candidate sequence among a plurality of candidate sequences, and the candidate sequences are sequences based on different root sequence indices or different cyclic shift values, and the superimposed sequence is configured to exclude information related to the LP-WUS, each superimposed sequence is configured as a predetermined single sequence, and the single sequence is a predetermined specific sequence among the plurality of candidate sequences.

[0011] In another aspect of this disclosure, a BS, a processor, and a storage medium are provided for performing signal transmission and reception methods.

[0012] The device may include an autonomous vehicle that can communicate with at least the UE, the network, and another autonomous vehicle other than the communication device.

[0013] The above aspects of this disclosure are merely some preferred embodiments of this disclosure, and various embodiments reflecting the technical features of this disclosure can be derived and understood by those skilled in the art from the following detailed description of this disclosure.

[0014] Beneficial effects

[0015] According to one embodiment of this disclosure, when transmitting and receiving reference signals between communication devices, signals can be transmitted and received more efficiently based on operations different from those in the prior art.

[0016] Those skilled in the art will understand that the effects achievable through this disclosure are not limited to those specifically described above, and that other advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 The structure of a radio frame is illustrated.

[0018] Figure 2 This example illustrates the resource grid during the duration of a time slot.

[0019] Figures 3 to 7 This is a diagram illustrating a method for transmitting and receiving signals according to an embodiment of the present disclosure.

[0020] Figures 8 to 11 An apparatus according to an embodiment of the present disclosure is illustrated. Detailed Implementation

[0021] The following technologies can be used in various wireless access systems such as 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). CDMA can be implemented as radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate GSM Evolution (EDGE). OFDMA can be implemented as radio technologies such as IEEE 802.11 (Wireless Fidelity (WiFi)), IEEE 802.16 (Global Microwave Access Interoperability (WiMAX)), IEEE 802.20, and Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS using E-UTRA (E-UMTS), and LTE-Advanced (LTE-A) is an evolution of 3GPP LTE. 3GPP New Radio or New Radio Access Technology (NR) is an evolution of 3GPP LTE / LTE-A.

[0022] For clarity, this disclosure will be described in the context of 3GPP communication systems (e.g., LTE and NR), which should not be construed as limiting the spirit of this disclosure. LTE refers to technologies beyond 3GPP TS 36.xxx version 8. Specifically, LTE technologies beyond 3GPP TS 36.xxx version 10 are referred to as LTE-A, and LTE technologies beyond 3GPP TS 36.xxx version 13 are referred to as LTE-A pro. 3GPP NR is a technology beyond 3GPP TS 38.xxx version 15. LTE / NR may be referred to as a 3GPP system. “xxx” specifies the technical specification number. LTE / NR may be collectively referred to as a 3GPP system. Background techniques, terms, abbreviations, etc., as used herein refer to technical specifications published prior to this disclosure. For example, the following documents may be referenced.

[0023] 3GPP NR

[0024] - 38.211: Physical Channels and Modulation

[0025] - 38.212: Multiplexing and Channel Coding

[0026] - 38.213: Physical layer procedures for control

[0027] - 38.214: Physical layer procedures for data

[0028] - 38.300: General Description of NR and NG-RAN

[0029] - 38.331: Radio Resource Control (RRC) Protocol Specification

[0030] Figure 1 The radio frame structure used for NR is shown.

[0031] In NR, UL and DL transmissions are configured on a frame-by-frame basis. Each radio frame is 10ms long and is divided into two 5ms half-frames. Each half-frame is further divided into five 1ms subframes. Subframes are divided into one or more time slots, and the number of time slots in a subframe depends on the subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each time slot includes 12 or 14 OFDM (A) symbols. When using normal CP, each time slot includes 14 OFDM symbols. When using extended CP, each time slot includes 12 OFDM symbols. Symbols can include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or Discrete Fourier Transform-Extended-OFDM (DFT-s-OFDM) symbols).

[0032] Table 1 exemplarily shows how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS under normal CP conditions.

[0033] [Table 1]

[0034] Table 2 shows the number of symbols per slot, the number of slots per frame, and the number of slots per subframe in the case of extended CP, depending on the SCS.

[0035] [Table 2]

[0036] In NR systems, different OFDM(A) parameter sets (e.g., SCS, CP length, etc.) can be configured for multiple cells aggregated for a UE. Therefore, the (absolute time) duration of time resources (e.g., subframes, slots, or transmission time intervals (TTI)) consisting of the same number of symbols (for convenience, referred to as time units (TU)) can be configured differently among the aggregated cells.

[0037] In NR, various parameter sets (or SCSs) can be supported to support a wide range of 5G services. For example, a 15kHz SCS can support wide areas in traditional cellular bands, while a 30kHz or 60kHz SCS can support dense urban areas, lower latency, and wide carrier bandwidth. For 60kHz or higher SCSs, bandwidths greater than 24.25kHz can be supported to overcome phase noise.

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

[0039] [Table 3]

[0040] Figure 2 This shows the resource grid during the duration of a time slot.

[0041] A time slot comprises multiple symbols in the time domain. For example, a time slot may contain 14 symbols in normal CP and 12 symbols in extended CP. A carrier comprises multiple subcarriers in the frequency domain. A resource block (RB) can be defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain. Multiple RBs can be interleaved (simply called interleaving) in the frequency domain. An interleaving m∈{0, 1, ..., M-1} can consist of (common) RBs {m, M+m, 2M+m, 3M+m, ...}. M represents the number of interleavings. A bandwidth portion (BWP) can be defined by multiple consecutive (physical) RBs ((P)RBs) in the frequency domain and corresponds to a set of parameters (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., five) BWPs. Data communication can be performed in active BWPs, and only one BWP can be enabled for a UE. Individual elements in a resource grid can be called resource elements (REs), to which a complex symbol can be mapped.

[0042] In a wireless communication system, the UE receives information from the BS in the downlink (DL) and transmits information to the BS in the uplink (UL). The information exchanged between the BS and the UE includes data and various control information, and various physical channels / signals exist depending on the type / purpose of the information exchanged. Physical channels correspond to a set of resource elements (REs) carrying information originating from higher layers. Physical signals correspond to a set of REs used by the physical layer but not carrying information originating from higher layers. Higher layers include the Media Access Control (MAC) layer, Radio Link Control (RLC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Resource Control (RRC) layer, etc.

[0043] DL physical channels include the Physical Broadcast Channel (PBCH), Physical Downlink Shared Channel (PDSCH), and Physical Downlink Control Channel (PDCCH). DL physical signals include the DL Reference Signal (RS), Primary Synchronization Signal (PSS), and Secondary Synchronization Signal (SSS). DL RS includes the Demodulation Reference Signal (DM-RS), Phase Tracking Reference Signal (PT-RS), and Channel State Information Reference Signal (CSI-RS). UL physical channels include the 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 Reference Signal (SRS).

[0044] Figure 3 An example of the SSB structure is shown. The UE can perform cell search, system information acquisition, beam alignment for initial access, DL measurements, etc., based on the SSB. The SSB can be used interchangeably with the Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block.

[0045] Reference Figure 3 The SSB consists of the PSS, SSS, and PBCH. The SSB is configured on four consecutive OFDM symbols, and the PSS, PBCH, SSS / PBCH, and PBCH are transmitted within each OFDM symbol. The PSS and SSS each consist of one OFDM symbol and 127 subcarriers, and the PBCH consists of three OFDM symbols and 576 subcarriers. Polar coding and Quadrature Phase Shift Keying (QPSK) are applied to the PBCH. The PBCH consists of data REs and demodulation reference signals (DMRS) REs in each OFDM symbol. There are three DMRS REs in each RB, and three data REs exist between the DMRS REs.

[0046] In this disclosure, the base station (BS) may be, for example, a gNode B (gNB).

[0047] LP-WUS (Low Power Wake-up Signal)

[0048] The above content can be applied in conjunction with the methods proposed in this disclosure (described later). Alternatively, the content can illustrate the technical features of the methods proposed in this disclosure.

[0049] Furthermore, the following methods can be equally applied to the aforementioned NR systems (licensed bands) or shared spectrum. Therefore, it is evident that the terminology, expressions, and structure in this document can be modified to suit the system in order to implement the technical concepts of this disclosure in the corresponding system.

[0050] In the Rel-18 NR standard, discussions are underway to introduce a Low Power Wake-up Signal (LP-WUS) and a separate receiver capable of receiving this signal (called a Low Power Wake-up Receiver or Low Power Wake-up Radio (LP-WUR)) as a new power reduction method, which differs slightly from the power reduction techniques for UEs introduced and supported in Rel-16 / 17. If the receiver (DL receiver) in a conventional NR system's UE is referred to as the primary radio / receiver (MR), then LP-WUR refers to a separate receiver (i.e., a companion radio / receiver) that can be introduced to reduce the power consumption of the MR. The term LP-WUR can be abbreviated as LR.

[0051] The options for generating LP-WUS waveforms will be described below. These options can be understood as different methods for generating multi-carrier on-off keying (MC-OOK) and multi-carrier frequency shift keying (MC-FSK) waveforms.

[0052] Figure 3 and Figure 4 The options for generating LP-WUS waveforms are illustrated.

[0053] Figure 3 and Figure 4 This involves the generation of multi-carrier amplitude shift keying (MC-ASK). Figure 3 and Figure 4 In this context, K is the size of the Inverse Fast Fourier Transform (IFFT) of Cyclic Prefix-Orthogonal Frequency Division Multiplexing Access (CP-OFDMA), and N is the number of subcarriers used in LP-WUS, including potential guard bands.

[0054] Figure 3 The option OOK-1 is shown as an example.

[0055] In option OOK-1, an OFDM symbol consists of a single bit. For LP-WUS subcarriers, OOK=1 means that all subcarriers are modulated. OOK=0 means that from a baseband perspective, all subcarriers have zero power.

[0056] Figure 4 The example shows option OOK-5.

[0057] Reference Figure 7 In option OOK-4, the M bits of OOK in the time domain are transformed. N subcarriers of OOK-1 are generated through the transformation (DFT / least squares). N' samples are generated from the M bits. Signal modifications may or may not be applied. Truncation or other additional modifications may or may not be applied. If not applied, N and N' are the same. N' can be equal to K.

[0058] exist Figure 3 and Figure 4 In this context, the modulated subcarrier can be, for example, a quadrature amplitude modulation (QAM) symbol, sequence, or other signal.

[0059] From the baseband perspective, the subcarriers of the potential guard band have zero power. Alternatively, from the baseband perspective, of the two additional segments, one segment can always be modulated, and the other segment can always be transmitted with zero power.

[0060] In addition to OOK-1 and OOK-4, OOK-2 and OOK-3 are also possible options.

[0061] Symbols based on OOK modulation can be called OOK symbols. For ease of description, "OOK-1 and / or OOK-4" can be simply represented as "OOK-1 / 4".

[0062] For OOK-1, one OOK symbol can be mapped to one OFDM symbol duration, and for OOK-4, M OOK symbols can be mapped to one OFDM symbol duration. Therefore, OOK-1 can send 1 bit per OFDM symbol, while OOK-4 can send M bits per OFDM symbol. If Manchester encoding (MC) is additionally applied to LP-WUS, twice the number of OFDM symbols may be needed to send the same number of bits. Furthermore, when the UE receives LP-WUS (including LP-WUR), the UE can perform a wake-up MR operation, and for this purpose, an identifier (ID) distinguishing each UE or its group (or subgroup) can be included in the LP-WUS. The UE ID can be, for example, a 5G Short-Term Mobile Subscriber Identity (5G-S-TMSI) value or a value reduced through operations such as modulo operations. Depending on the ID used, this value can be approximately 48 bits. Therefore, a large number of OFDM symbols can be used to send the UE ID via OK-1 / 4. For example, assuming the MC is used to transmit a 48-bit UE ID, 96 OFDM symbols are required in the OOK-1 case. When the portion carrying the UE ID is called the LP-WUS message portion, the number of OFDM symbols required may increase if a preamble portion is transmitted along with it to assist in the reception of the message portion. The preamble portion can transmit the information required for LR detection / decoding the message portion. Figure 5 An example of an LP-WUS transmission including a preamble portion and a message portion is shown.

[0063] If an LP-WUS transmitted to a specific UE (or group of UEs) occupies a specific (frequency / time) channel for a specific period of time or longer, this can lead to inefficient use of resources for both the network and the UE. From the perspective of LP-WUS signal reception, it may also be susceptible to interference. Furthermore, if accurate time synchronization is not ensured, the LP-WUS may have to attempt to monitor a duration longer than the actual length of the LP-WUS. When the LP-WUS includes a preamble and a message portion, efficient signal configuration and construction methods are required.

[0064] For LP-WUS, overlay sequences can be used with OOK waveforms. Depending on how the overlay sequence is overlaid on each OOK or OFDM signal, it can affect LP-WUS transmission time and / or the frequency resources occupied by the LP-WUS. Additionally, this can enhance the utility of LP-WUS if certain information is transmitted via an overlay sequence. However, not all LP-WUS URs can receive (detect / decode) overlay sequences. If the overlay sequence modulates each subcarrier in the frequency domain, only LP-WUS URs capable of performing FFT and / or sequence correlation in the frequency domain can receive the overlay sequence. Even when the sequence is overlaid on each OOK or OFDM symbol in the time domain, only LP-WUS URs with sequence correlation capabilities in the time domain can receive the sequence. Since the lowest complexity LP-WUS URs can only distinguish between on / off OOK symbols, overlay sequences need to be designed considering various types of LP-WUS URs.

[0065] A separate low-power synchronization signal (LP-SS) can be defined and transmitted for the time / frequency synchronization required to receive LP-WUS transmitted from the LP-WUR. The LP-SS can be a signal / waveform generated according to OOK or FSK waveform generation methods (similar to LP-WUS), and a superposition sequence can be applied. The LP-SS can be transmitted periodically or aperiodically. Based on the LP-SS, the LP-WUR can measure the power of the received signal to offload or relax the RRM measurement of the MR.

[0066] As described above, the LP-WUS (transmitted by the BS) can consist of a preamble portion and a message portion. The preamble portion may include information necessary for receiving the subsequently transmitted message portion (e.g., the data rate, modulation, and encoding method of the message portion). Alternatively, the preamble portion may include a known sequence / signal without transmitting specific information. Alternatively, a separate known sequence / signal may be transmitted before or after the preamble portion. The message portion may carry identification information for a specific UE or UE group (or subgroup), or simply transmit wake-up instructions for multiple UEs. Alternatively, cell-related information, emergency-related information (such as earthquake and tsunami warning systems / commercial mobile alert systems (ETWS / CMAS)), and system-related information (for UEs) (such as tracking area, radio access network (RAN) area, system information (SI) change indication, or paging-related information) may be transmitted. Cyclic Redundancy Check (CRC) may also be transmitted in addition to the preamble portion and / or the message portion. In this case, the CRC can be generated based on the preamble portion and / or the message portion. Depending on the configuration, the CRC may not be included. The proposed method of this disclosure is described based on the assumption that the preamble portion, message portion, and / or CRC have such characteristics, but the proposed method is not necessarily limited to LP-WUS transmission with this structure.

[0067] In the following proposal, depending on the context, the term "timing" can refer to the transmission timing (TO) of a signal (transmitted by the BS) or the monitoring timing (MO) of a signal (monitored by a receiver such as an LP-WUR). TO refers to the opportunity to transmit a signal, and the signal may not be transmitted at that location (depending on the BS's configuration or requirements). MO refers to the opportunity to monitor a signal, and the receiver may not monitor the signal at that location (depending on the BS or UE's configuration or requirements / circumstances). Additionally, for ease of description, even if only one of MO or TO is used, it can refer to MO, TO, or both MO and TO, depending on the proposed method and context.

[0068] In the following proposals, LP-WUS timing may refer to the timing at which the preamble portion and / or message portion of LP-WUS can be transmitted. In the following proposals, configuring LP-SS / LP-WUS timing may be interpreted as configuring one or more of the following: the LP-SS / LP-WUS time period, start time, end time, duration, offset within the time period, or frequency of transmitting the corresponding signal.

[0069] In the following proposal, it is assumed that LP-SS is transmitted periodically (unless otherwise specified). However, the proposed methods and configuration methods can be applied equivalently to LP-SS transmitted non-periodically.

[0070] In the following proposal, the preamble portion of LP-WUS is described based on the assumption that it is used to provide configuration information for subsequent message portions, or that it includes both such information and a known sequence / signal. However, if the information for transmitting message portions is provided via LP-SS, or if the preamble portion is used only as a known sequence / signal (without providing additional information), then the preamble or preamble portion in the proposed method described below can be replaced by LP-SS.

[0071] In this instruction manual, the symbol “” is placed at the beginning of each paragraph. "", "", "and" "It can indicate the vertical / horizontal relationship between paragraphs. Specifically, the symbol " "", "and" " can represent a higher-level category in the corresponding order. For example, " "After" "Can be used to target" This is a supplementary explanation of the phrase "". "After that" "Can be used to target" This is a supplementary explanation of the phrase "". "After that" "Can be used to target" This is a supplementary explanation of "".

[0072] In the various examples disclosed herein, " / " and "," should be interpreted as indicating "and / or". For example, "A / B" can mean "A and / or B". "A,B" can mean "A and / or B". "A / B / C" can mean "at least one of A, B and / or C". "A,B,C" can mean "at least one of A, B and / or C".

[0073] [Method #1] Mapping information from the DFT of OOK-4 to samples (per bit sample)

[0074] For example, BS can be used as... Figure 4 The box shown uses the OOK-4 modulation scheme to generate LP-WUS / LP-SS.

[0075] In this context, for valid OOK symbol detection at the UE, it is necessary to specify each block, including the process of mapping the information bits of LP-WUS / LP-SS to samples in the pre-DFT domain. This corresponds to per-bit sample mapping and can correspond to... Figure 4 The first stage of “M-bit to N' sample mapping” or as Figure 4The second stage is "signal generation and modification." Several methods for this are proposed in this chapter.

[0076] 1) Transmitter (Entity A): Per-bit Sample Mapping When the number of samples (per-bit samples) mapped to each bit in the pre-DFT domain by each bit transmitted via LP-WUS / LP-SS (in this case, OOK-4 with M=1) is N, the BS can perform per-bit sample mapping based on the number of LP-WUS BW / PRBs and the configured value of M, according to the following relationship. When the number of BWs (or PRBs) in the configuration of LP-WUS / LP-SS increases by a factor X, the per-bit sample = X can be applied. N When the BW for the LP-WUS / LP-SS configuration sets the M value to a multiple of Y, the formula per bit sample = N / Y can be applied. If N is not a multiple of Y, then ceil(N / Y) can be applied. The number of samples per bit can be the length of the (overlay) sequence mapped to each bit in the pre-DFT domain.

[0077] N can represent the number of samples for OOK / OFDM symbols (or 1 / K times the number of samples), and can be the number of CPs excluded or included. N can be scaled according to SCS. For example, the value of N can increase proportionally as SCS increases.

[0078] For example, when configured with a 5 MHz BW and M=1, assuming the number of samples mapped to one bit in the pre-DFT domain, or the length of the (overlay) sequence, is L, For a 10 MHz BW, 2 bits per bit can be used. L samples or a length of 2 The sequence of L.

[0079] For OOK-4 with M=4 and the same BW, N / 4 samples per bit or a sequence of length N / 4 can be used.

[0080] If the number of BW (or PRB) is defined / configured to increase at the same rate as M, then the number of samples per bit can be defined / configured to a specific value. The number of N, BW, PRB, M, X, Y, L, etc. can be predefined, configured / indicated by higher-level parameters such as RRC or SIB, or configured / indicated by preamble or LP-SS (configured / indicated to the UE by the BS).

[0081] The method for changing the per-bit sample mapping, its specific value, whether N includes CP, scaling scheme according to SCS, etc., can be predefined, configured / indicated by higher-level parameters such as RRC or SIB, or configured / indicated by preamble or LP-SS (configured / indicated to the UE by BS).

[0082] DFT (or least squares method) size against Figure 4 The DFT can be a multiple of a PRB (=12 REs), as in the current NR UL.

[0083] To reduce the complexity of BS / UE and facilitate a simpler implementation, powers of 2 (i.e., values ​​in the form of 2^A (e.g., 2, 4, 8, 16, 32, 64, ...)) can be used as the DFT size.

[0084] For example, when applying a DFT of size 256, for M=1 / 2 / 4, the number of samples per OOK symbol (=N') can be 256 / 128 / 64 respectively. Therefore, the length of the superimposed OFDM sequence can also be a power of 2 (i.e., a value of the form 2^B (e.g., 256 / 128 / 64 or 32 / 16...)).

[0085] "Truncate N'->N and Modify" block (and / or "Signal Generation and Modification" block) If the number of BWs (or PRBs) allocated / configured for LP-WUS / LP-SS is a multiple of RBs (i.e., 12 REs) (= number #1), then the number of samples per bit can also be a multiple of RBs (= number #2).

[0086] In this case, the DFT size can also be a multiple of RB (i.e., 12 REs) (= number #3). For example, numbers #1, #2, and #3 can all have the same value.

[0087] If the DFT (or least squares) size is a power of 2, zero-padding can be performed in the "Signal Generation and Modification" block, and / or truncation can be performed in the "Truncation N'->N and Modification" block. For example, zero-padding can be performed by adding "Number #2 - Number #3" zeros before (or after) the number #3 sample to generate the number #2 sample. For example, truncation can be a process of excluding "Number #2 - Number #1" results from the beginning (or end) of the number #2 DFT results and retaining only the number #1 result. Alternatively, truncation can be a process of excluding multiple results corresponding to half of "Number #2 - Number #1" from each of the beginning and end of the number #2 DFT results, thus retaining only the number #1 result.

[0088] 2) Receiver (Entity B): The operation of the BS directly (explicitly) configuring / indicating specific parameters or applying / assuming specific parameters to the UE can be replaced and applied as the operation of the UE directly (explicitly) receiving the corresponding parameter configuration / indication or applying / assuming the corresponding parameter from the BS.

[0089] The BS indirectly (implicitly) configures / indicates a specific parameter (= parameter #1) to the UE through another specific parameter (= parameter #2) or a specific operation / mode, or applies / assumes the operation of parameter #1 through parameter #2 or a specific operation / mode. This can be replaced and applied as the UE indirectly (implicitly) receives the configuration / indication of parameter #1 from the BS through parameter #2 or a specific operation / mode, or applies / assumes the operation of parameter #1 through parameter #2 or a specific operation / mode.

[0090] The UE can understand the method of transmitting LP-WUS / LP-SS by pre-configuring or assuming / defining the transmission scheme of the BS, and therefore can receive / monitor LP-WUS / LP-SS in the required time / frequency resources.

[0091] [Method #2] OFDM sequence design for OOK symbol generation and / or superposition

[0092] The sequence that can be used to generate OOK symbols for LP-WUS / LP-SS can refer, for example, to the sequence that maps each information bit to for each time period when generating LP-WUS / LP-SS via OOK-4 modulation, or to an overlay OFDM sequence to be transmitted along with OOK / OFDM symbols generated in this way. To generate a sequence that can be used to generate OOK symbols for LP-WUS / LP-SS, pseudo-random (PN) sequences, ZC sequences, m-sequences, Gold sequences, etc., defined for regular NR PUCCH or SRS can be used. This can mitigate inter-cell interference that may occur during the transmission and reception of LP-WUS / LP-SS. The methods for configuring / determining the base sequence of the PN or ZC sequence, the sequence group transitions based on their configuration, the sequence number transitions (within the corresponding sequence group), and the cyclic shift-based transition methods defined in Section 5.2 of 3GPP TS 38.211 can be used as is or modified for LP-WUS / LP-SS sequences.

[0093] 1) Transmitter (Entity A) and / or receiver (Entity B): In the sequence generation method described below, the base sequence can be a PN sequence as defined in section 5.2 of the current 3GPP TS 38.211. However, the base sequence is not necessarily limited to this and can be a sequence generated in a similar manner (e.g., a sequence generated based on cell ID, slot / symbol index, separately configured hop ID, and an m-sequence or Gold sequence).

[0094] (Method 1) Using the same sequence as PUCCH (Section 6.3.2.2 of 3GPP TS 38.211) The sequence group (U) and sequence number (V) can be determined based on the cell ID (or hoppingId), slot index, and hop index. However, separate RRC parameters for hoppingId, pucch-GroupHopping, and intraSlotFrequencyHopping can be defined / configured to replace those in section 6.3.2.2 of 3GPP TS 38.211.

[0095] The cyclic shift (CS) can be determined based on the slot index, symbol index, and cell ID (or hoppingId) initialized for the PN sequence. However, a separate RRC parameter can be defined / configured to replace the hoppingId in section 6.3.2.2 of 3GPP TS 38.211.

[0096] (Method 2) The method of sequence determination obtained by modifying the method described for PUCCH (i.e., section 6.3.2.2 of 3GPP TS 38.211) to suit LP-WUS / LP-SS. Except for the following modifications, the sequence group (U) and sequence number (V) can be the same as in method 1.

[0097] Method 2-1: Set the skip index to 0.

[0098] Method 2-2: When the index of the OFDM symbol in the time slot for transmitting LP-WUS / LP-SS is 0 to [6], the hop index is determined to be "0", and when the index of the OFDM symbol is [7] to 13, the hop index is determined to be "1" (or it can be determined based solely on the index of the starting OFDM symbol of LP-WUS / LP-SS). In other words, the OFDM symbols in the time slot for transmitting LP-WUS / LP-SS are grouped, and the hop index is determined to be 0 or 1 for each group (e.g., symbols 0 to 6 = hop index 0, and symbols 7 to 13 = hop index 1).

[0099] Method 2-3: (In the absence of a skip index or when the skip index is set to 0) Determine U and V based on at least one of the slot index, OFDM symbol index, or OOK symbol index. For example, in the absence of a skip index or when the skip index is set to 0, determine U and V based on the slot index and the OFDM symbol index. Alternatively, in the absence of a skip index or when the skip index is set to 0, determine U and V based on the slot index, the OFDM symbol index, and the OOK symbol index.

[0100] The CS is determined based on at least one of the slot index, OFDM symbol index, or OOK symbol index. For example, the CS is determined based solely on the slot index without using the OFDM symbol index. Alternatively, the CS can be determined based on the slot index, OFDM symbol index, and OOK symbol index.

[0101] In the above proposal, the values ​​of U / V / CS, etc., can be predefined or configured through higher-layer parameters (such as RRC or SIB) (configured to the UE by the BS).

[0102] In the sequence generation method described above, the proposed method can be applied, wherein some of the variables used to determine the values ​​of U, V, CS, etc., are set to fixed values ​​(e.g., 0 or 1). Alternatively, the proposed method can be applied with some variables omitted.

[0103] The above sequences can be used as sequences for generating OOK symbols for LP-WUS and / or LP-SS transmissions, and / or can be used as OFDM sequences for superimposed on corresponding LP-WUS / LP-SS transmissions.

[0104] For example, the above sequence can be used to generate OOK symbols for LP-SS transmission.

[0105] For example, the above sequence can be used as a sequence superimposed on the OOK symbol for LP-WUS transmission.

[0106] [Method #2A] A method for determining the base sequence or cyclic shift value of a superimposed sequence.

[0107] ZC sequences applied to NR signals are described in sections 5.2 and 6.3.2.2 of 3GPP TS 38.211. The base sequence and cyclic shift are determined based on the type of signal / channel using the corresponding sequence and its time / frequency resources.

[0108] The base sequence and / or CS (cyclic shift) value of the ZC sequence can be determined based on the OFDM symbol index and the slot index of the corresponding signal (e.g., PUCCH). An LP-WUS signal (carrying a single LP-WUS message) can be transmitted over multiple OFDM symbols (or over two slots), therefore, when the standard generation method of 3GPP TS 38.211 is applied as is, the base sequence or CS value is not determined as a single value within an LP-WUS signal. The benefit gained from transmitting an LP-WUS while changing the base sequence or CS value between two or more values ​​is unclear; it only increases the implementation complexity of the BS and UE transmitting and receiving LP-WUS. Therefore, it is necessary to determine the base sequence and CS value applied to the superimposed sequence of LP-WUS on a unit basis, for multiple OFDM symbols transmitting LP-WUS. Assuming that LP-WUS is transmitted over N OFDM symbols (in which case the corresponding OFDM symbol index can be represented as index(k), ..., index(k+N-1)), one of the following two methods can be used.

[0109] Method A: A method of determining a base sequence and / or CS value based on the minimum value among N OFDM symbol indices (or the index of the earliest OFDM symbol among the OFDM symbols transmitting the corresponding LP-WUS) and applying the determined value equally to the N OFDM symbols transmitting the corresponding LP-WUS.

[0110] For example, for l or l', which represents the OFDM symbol index used to determine the base sequence or CS value, the index of the first OFDM symbol of LP-WUS can be used to transmit all N OFDM symbols of LP-WUS, and the base sequence or CS value for the superimposed sequence can be determined accordingly.

[0111] Method B: N OFDM symbols can be considered as a "symbol group," and a symbol group index (or a time slot group) can be introduced. The following method can be used: determine a base sequence and / or CS value based on the corresponding symbol group index and apply the determined value equally to the N OFDM symbols transmitting the corresponding LP-WUS.

[0112] For example, in the formula used to determine the base sequence or CS value, the slot index (within a radio frame) is represented. The symbol group index (within the radio frame) can be used as a substitute, and the base sequence or CS value for the LP-WUS superposition sequence can be determined accordingly. In this case, the size and position (within the frame) of the symbol group can be predefined or configured via higher-level parameters (e.g., RRC or SIB). For the formula used to determine the base sequence or CS value, except for Other parameters besides l and l' can be 0, 1, or (configurable) constants, and the base sequence or CS value for the LP-WUS superposition sequence can be determined accordingly.

[0113] For ease of description, the proposed method has been described with reference to the ZC sequence of PUCCH described in Section 6.2.2 of 3GPP TS 38.211. However, the method in Method A, which applies the same value to multiple OFDM symbols transmitting LP-WUS by using the index of the first OFDM symbol of LP-WUS, or the method in Method B, which groups multiple OFDM symbols transmitting LP-WUS into "symbol groups" and uses their indices to determine the base sequence or CS value, can be similarly applied to any ZC sequence. For example, NR specifications such as 3GPP TS 38.211 specify ZC sequences for DMRS in PUCCH, DMRS in PUSCH, SRS, etc., and methods for determining their base sequence or cyclic shift values. The ZC sequence to be used as the overlay sequence for LP-WUS can be determined by modifying only a portion of the specified method, as in Method A or Method B, the index or slot index applied to each OFDM symbol.

[0114] Table 4 shows a portion of the agreements reached at the RAN1 standardization meeting regarding the above operations.

[0115] [Table 4]

[0116] The LP-WUS transmission scheme and UE operation assumed in the proposal of [Method #2A] The UE can monitor / receive LP-WUS in LOs (LP-WUS timings) that can be configured (by the BS) or calculated / determined (by the UE), and each LO can include multiple LMOs (LP-WUS monitoring timings). An LMO can refer to a resource (e.g., a time-domain resource, i.e., an OFDM symbol or an OOK symbol) for transmitting an LP-WUS msg (= message). In this case, an LP-WUS msg can refer to a unit used to transmit, for example, a wake-up indication for one or more UE groups (e.g., a subgroup of UEs monitoring the same PO) or for a specific UE. When LP-WUS is transmitted using multiple beams, each beam can be transmitted through one or more LMOs, and all beams can be transmitted at least once through a single LO.

[0117] Among the multiple LMOs constituting an LO, one or more (e.g., K) LMOs corresponding to each beam (or configured for each beam) can be used for the repeated transmission of one LP-WUS msg and / or the transmission of two or more different LP-WUS msgs. For example, when the number of LMOs corresponding to one beam among the multiple LMOs constituting an LO is K, K can be configured as K=M. R, where M can represent the number of different LP-WUS msgs, and R can represent the number of times an LP-WUS msg is repeatedly transmitted. That is, through M corresponding to each beam within the corresponding LO... There are R LMOs, and M different LP-WUS messages can each be transmitted R times repeatedly. In this case, the UE monitoring / receiving LP-WUS can be configured to monitor all K LMOs for each beam.

[0118] Alternatively, the K LMOs corresponding to a beam can be divided into G distinct groups, and the LMOs in each group can also be determined by K=M. R LMOs (i.e., LMOs for M different LP-WUS msgs and R repeated transmissions). In this case, the UE monitoring / receiving LP-WUS can be configured to monitor / receive only the LMOs in the group corresponding to the UE's identifier (ID) among G groups (i.e., it is not necessary to monitor the LMOs of the remaining G-1 groups). The UE's ID can be determined in various ways, and for example, it can refer to the index of the subgroup (corresponding to one or more POs) to which the UE belongs in the RRC idle / inactive state, the index of the specific UE group to which the UE belongs in the RRC connected state, or the UE's UE ID (or a specific value derived from it).

[0119] The proposed method can be specifically applied to LO and LMO configuration schemes that include some or all of the aforementioned LO and LMO configurations (or LO and LMO configurations according to the aforementioned RAN1 protocol). However, the proposed method can also be applied to any LO / LMO configuration, as long as the basic principles of the proposal are not changed.

[0120] For example, among multiple LMOs within a LO, K LMOs for a specific beam can be divided into G groups (based on the UE's subgroup index) (in this case, each group can be divided into M groups as described above). (The system consists of R LMOs), and each UE can monitor only the LMOs of one group within the group. In this case, corresponding group indices can be configured for the G groups. The base sequence or CS value of the ZC sequence can be determined based on the corresponding group index (rather than the symbol index or slot index). The group index of the G groups can be the index of the UE subgroup corresponding to the corresponding group. Alternatively, the index can be assigned to all LMOs within the LO (or M within the group). R LMOs), and the assigned index can be replaced. At least one of l, l, or l', and can be used to determine the base sequence or CS value. Alternatively, the base sequence or CS value determined based on the lowest index can be used equivalently for all LMOs.

[0121] As another example, when K LMOs for a specific beam within a LO are divided into M groups (according to the LP-WUS msg) (in which case each group can consist of R LMOs for repeated transmissions as described above), corresponding group indices can be configured for the M groups, and the base sequence or CS value of the ZC sequence can be determined based on the corresponding group index (rather than the symbol index or slot index). Alternatively, an index can be assigned to all LMOs within the LO (or the R LMOs within a group), and the assigned index can replace... At least one of l, l, or l', and can be used to determine the base sequence or CS value. Alternatively, the base sequence or CS value determined based on the lowest index can be used equivalently for all LMOs.

[0122] As another example, when K LMOs for a specific beam within a LO are divided into R LMOs (repeated transmissions of the same LP-WUS msg), corresponding LMO indices can be configured for the R LMOs, and the base sequence or CS value of the ZC sequence can be determined based on the corresponding LMO index (rather than the symbol index or slot index). Alternatively, a base sequence and / or CS value can be applied to the R LMOs for repeated transmissions of the same LP-WUS msg. For this purpose, the base sequence and / or CS value of the earliest LMO among the R repeated transmissions can be equivalently applied to all LP-WUS transmissions through the R LMOs. When a base sequence and / or CS value is determined based on the LMO index, multiple symbol group indices of the corresponding LP-WUS, or the first OFDM symbol index (as in method A or method B), the determined base sequence and / or CS value can be equivalently applied to all LP-WUS transmissions through the R LMOs.

[0123] If the LMO within the LO has a structure that includes all of the aforementioned G groups, M groups, and R LMOs (e.g., G>=1, M>=1, and R>=1, where the indices of the G groups are represented by index_g, the indices of the M groups are represented by index_m, and the indices of the R LMOs are represented by index_r), then At least one of l or l' can be replaced by one of index_g, index_m or index_r, or by the sum of two or more of them, and at least one of index_g, index_m or index_r used for replacement can be used to determine the base sequence and / or CS value.

[0124] [Method #2B] Method for configuring superimposed sequences that do not carry information bits

[0125] Information bits may be transmitted by a superimposed OFDM sequence applied to LP-WUS or LP-SS (this operation mode is referred to as mode #0). For example, log2(N) bits may be transmitted by selecting and transmitting one candidate superimposed sequence among N candidate superimposed sequences. For example, to transmit 2 bits via a superimposed sequence, four sequences s1 to s4 may be defined, the bit value "00" may be represented by s1, the bit value "01" may be represented by s2, the bit value "10" may be represented by s3, and the bit value "11" may be represented by s4. A receiver capable of detecting / decoding the superimposed sequence may identify the transmitted sequence through a sequence correlator or the like, and detect the bits transmitted therethrough. In an operation mode in which information bits are not transmitted via a superimposed sequence (this operation mode is referred to as mode #1), the receiver does not need to detect the transmitted superimposed sequence, and thus only one superimposed sequence may be defined.

[0126] Under mode #0, N superimposed sequences may be generated by changing the CS value for one base sequence. One superimposed sequence used under mode #1 may be configured (via a higher layer parameter) as one sequence among the N sequences defined under mode #0. Alternatively, under mode #1, a base sequence with a CS value of 0 among the N sequences defined for mode #0 may be used.

[0127] Under mode #0, N superimposed sequences may be defined / configured based on N different base sequences. One superimposed sequence used under mode #1 may be configured (via a higher layer parameter) as one sequence among the N sequences defined under mode #0. Alternatively, under mode #1, a base sequence having the smallest root index, sequence group number, or sequence number (within the corresponding group) among the N sequences defined for mode #0 may be used as the superimposed sequence.

[0128] [Method #3] When sending fewer bits than the maximum number of information bits that can be sent via LP-WUS / LP-SS Configuration method

[0129] When the number of information bits that a BS can transmit at a time (or continuously) via LP-WUS / LP-SS is K, the BW and / or time domain occasion for transmitting the corresponding LP-WUS / LP-SS may be determined based on K. In this case, when the BS transmits fewer than K bits (e.g., L bits), the time / frequency resources configured based on K may be used as-is, the L meaningful bits may be transmitted first, and the remaining K-L bits may be set to "0" (i.e., zero or unmodulated OOK symbols) and transmitted. However, in this case, more resources than are actually required for transmission may be unnecessarily used. To avoid this drawback, when transmitting L (<K) bits, the BS may configure time / frequency resources based on L, and transmit the LP-WUS / LP-SS via the corresponding resources.

[0130] In the proposal described below, the maximum number of bits K can correspond to the maximum number of UEs, UE groups, or UE subgroups that can be distinguished by the transmission information of LP-WUS / LP-SS. The L bits actually transmitted via LP-WUS / LP-SS can correspond to the number of UE-ID-based subgroups that can be distinguished according to the configuration of the BS (or the configuration of the core network).

[0131] The method described below can be applied to LP-WUS / LP-SS modulated using OOK-4. However, when using OOK-1 to modulate LP-WUS / LP-SS, OOK-1 can be considered as OOK-4 with M=1, and the same method can be applied. In the method described below, the description based on some M values ​​can be applied equivalently to any M value (e.g., M=1, 2, 4, 8, ...).

[0132] 1) Transmitter (Entity A): The BS can use one of the following methods (or a combination of two or more of the following methods) to send fewer bits than the maximum number of information bits that can be sent via LP-WUS / LP-SS.

[0133] Alternative Option 1: Transmit a bitmap capable of representing the maximum number K transmittable bits via K / M (or L) OFDM / OOK symbols. To terminate LP-WUS / LP-SS monitoring early, L bits corresponding to the actual configured subgroup can be sent first (the same method can be applied when the superimposed OFDM sequence sends one bit for each OOK symbol). For example, when up to eight subgroups can be configured and LP-WUS / LP-SS is transmitted over 8 / M OFDM symbols, if only six subgroups are configured, the six bits for the configured subgroup can be arranged starting from the earlier OFDM symbol, and the remaining two bits can then be arranged (e.g., to transmit a value of 0). If the number of valid subgroups decreases due to deactivation or backoff monitored by LP-WUS, the transmission order of the bits corresponding to the corresponding subgroups can also be changed to a later position. Alternative Option 2: Send a bitmap that represents only the number of subgroups actually configured (i.e., reduce the number of OFDM / OOK symbols required for transmission). Alternative Option 3: Indicate wake-up of all UEs by sending a 0-bit format. Implementation: Assuming that LP-WUS / LP-SS is transmitted along with the preamble and CRC, and that information bits are sent through the message portion (i.e., non-zero bits are sent in preamble-message-CRC order / structure), zero bits can be sent by omitting the preamble-CRC order / structure in the message portion. Implementation: Alternatively, a bitmap with a width of K+X bits can be configured by adding X bits at the beginning (or end) of the K-bit bitmap, and the added X bits can be used to indicate the wake-up of all UEs.

[0134] Which of the above methods can be used can be predefined or can be configured / indicated through high-level parameters such as RRC or SIB.

[0135] 2) Receiver (Entity B): The BS's direct (explicit) operation of configuring / indicating specific parameters to the UE or applying / assuming specific parameters can be replaced and applied as the UE being directly (explicitly) configured with or receiving instructions or applications / assuming corresponding parameters from the BS.

[0136] The BS indirectly (implicitly) configures / instructs the UE to a specific parameter (= parameter #2) or applies / assumes parameter #1 by using another specific parameter (= parameter #2) or a specific operation / mode. This operation can be replaced and applied as the UE is indirectly (implicitly) configured with or receives the BS's instruction or application / assume of parameter #1 by parameter #2 or a specific operation / mode.

[0137] This disclosure is not limited to the transmission and reception of UL and / or DL ​​signals. For example, this disclosure can also be used for direct communication between UEs. Additionally, the term "BS" in this disclosure can include both relay nodes and base stations. For example, the operation of the BS described in this document can be performed by a base station, but the operation can also be performed by a relay node.

[0138] A-IoT (Ambient Internet of Things)

[0139] A-IoT can be a new type / fragment of devices that operate solely on energy harvested from the surrounding environment. For example, A-IoT can refer to a new type of Internet of Things (IoT) device that is powered and operated using various harvestable energy sources from the environment, such as radio waves, light, motion, or heat.

[0140] For example, active signal generation and / or backscattering can be found in communication technologies considered to enable low-power operation in A-IoT devices. Specifically, backscattering is a technique widely used in radio frequency identification (RFID), which allows a device to communicate with a network by reflecting an incident wave after modulating the information to be transmitted. For example, the device may be powered by an incident radio frequency (RF) signal or by stored energy.

[0141] For example, A-IoT devices can be classified into various types (such as passive, semi-passive, and active) depending on their energy storage and signal transmission methods. For instance, passive devices do not have energy storage components (e.g., capacitors) and can communicate based on backscatter communication technology. Semi-passive devices include energy storage components and can communicate based on backscatter communication technology with the assistance of these components. Active devices include energy storage components and can actively generate signals for communication based on active RF components and stored energy. In this disclosure, 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 supporting backscatter transmission). Device B can be a device with energy storage but without independent signal generation (e.g., a device supporting backscatter transmission). In this case, the use of stored energy may involve amplifying the reflected signal. Furthermore, device C can be a device with both energy storage and independent signal generation (e.g., a device equipped with active RF components for transmission).

[0142] For example, to support A-IoT devices in indoor and outdoor scenarios, the following basic topology can be considered. The basic topology may include direct connection from the BS to the A-IoT device, connection from the BS to an intermediate node to the A-IoT device, connection assistance from a support node, and / or connection from the UE to the A-IoT device. The basic topology presented in this disclosure is merely an example, and the proposals of this disclosure can be extended or applied to other topologies.

[0143] A-IoT devices can be categorized into two types. For example, Type 1 devices may have a maximum power consumption of approximately 1 µW, support energy storage, lack amplification capabilities, and perform transmission via backscattering an externally provided carrier wave (CW) (e.g., from a reader such as a BS, UE, or a standalone node). Type 2 devices, on the other hand, may have a maximum power consumption of approximately several hundred µW, support energy storage, include amplification capabilities, and perform transmission via backscattering an externally provided CW (e.g., from a reader such as a BS, UE, or a standalone node) or by using internally generated signals.

[0144] For example, in addition to the classification methods described above, A-IoT devices can also be distinguished by parameters related to a combination of device characteristics or parameters (e.g., device characteristics include the presence / capacity of energy storage, energy consumption / power level, presence / capability of amplification, presence / capability of bandpass filter (BPF), supported DL / UL transmission schemes, etc.). Here, for example, BPF capability can be distinguished by the 3-dB bandwidth or sharpness of the BPF, and UL transmission schemes can be classified, for example, as backscattered UL transmission, UL transmission based on internally generated signals, etc.

[0145] Furthermore, A-IoT devices can be further subdivided into types / classes based on parameters related to combinations of device characteristics or parameters (e.g., device characteristics include the presence / capacity of energy storage, energy consumption / power level, amplification presence / capability, BPF presence / capability, supported DL / UL transmission schemes, etc.). For example, when a device performs transmission via backscattering of externally provided CW (e.g., from a reader such as a BS, UE, or a separate node), the aforementioned Type 2 device can be further classified as a Type 2a device, and when a device performs transmission using internally generated signals, the aforementioned Type 2 device can be further classified as a Type 2b device. In this case, each of the Type 2a and Type 2b devices may have a maximum power consumption of approximately several hundred µW, support energy storage, and include amplification capabilities.

[0146] LP-WUS can be sent and received between A-IoT devices. Specifically, the waveform sent from the reader to the A-IoT device can correspond to the waveform presented in the embodiments of this disclosure. The A-IoT device may include only the LR and not the MR. Therefore, upon receiving LP-WUS, the A-IoT device can perform operations such as initial access or data transmission / reception via the LR, rather than triggering (or activating) the MR.

[0147] Obviously, each example of the proposed method can also be included as an implementation of this disclosure, and thus each example can be considered as a proposed method. Although the proposed methods described above can be implemented independently, some of the proposed methods can be combined (or merged) and implemented. Furthermore, it can be specified that information regarding whether the proposed method is applied (or information regarding rules related to the proposed method) is transmitted from the BS to the UE or from the transmitting UE to the receiving UE in predefined signals (e.g., physical layer signaling or higher layer signaling).

[0148] Implementation example

[0149] Figure 6 This is a flowchart of a signal transmission and reception method according to an embodiment of the present disclosure.

[0150] Reference Figure 6 The signal transmission and reception method according to the embodiments of this disclosure can be performed by a UE. The signal transmission and reception method may include the following steps: receiving a signal through a first receiver (S501) and performing a specific operation based on the reception of the signal (S503).

[0151] Specifically, the operation could be the UE triggering the operation of the second receiver. Alternatively, if the UE is an A-IoT device, the specific operation could be the UE sending a response signal in response to the signal.

[0152] The signal can be LP-SS and / or LP-WUS as described in this disclosure. Even if the signal is expressed with different names, it can also correspond to LP-WUS of this disclosure if the signal is intended to trigger the operation of another receiver based on the reception of it by a particular receiver, or if the signal is received by an A-IoT device. Additionally, even if the signal is expressed with different names, it can also correspond to LP-WUS of this disclosure if the signal is used for LP-WUS synchronization.

[0153] The first receiver corresponds to a separate receiver (i.e., LP-WUR) for receiving LP-WUS, and the second receiver corresponds to the master receiver (i.e., MR). The second receiver can be a receiver for receiving paging signals or control signals for paging signals. Alternatively, the second receiver can be a receiver capable of receiving PDCCH. Although the specific names can be changed from LP-WUR and MR to other names, the first receiver is configured to consume less power than the second receiver. The master receiver can be a receiver in a conventional NR system. However, even if the master receiver is a receiver used in a communication system other than an NR system, it can still correspond to the master receiver, as long as it is triggered based on signal reception from another receiver that consumes less power.

[0154] However, an A-IoT device may include only the first receiver of the first receiver and the second receiver.

[0155] Apart from Figure 6 In addition to the basic operations, other operations disclosed in this manual can be combined with it.

[0156] Figure 7 This is a flowchart illustrating in more detail a method for transmitting and receiving signals according to embodiments of the present disclosure.

[0157] Reference Figure 7From the perspective of the UE, the method for transmitting and receiving signals according to embodiments of the present disclosure may include the following steps: receiving LP-WUS through a first receiver (S1203), and operating a second receiver based on the reception of LP-WUS (S1204). From the perspective of the BS, the method for transmitting and receiving signals according to embodiments of the present disclosure may include the following steps: determining an overlay sequence for LP-WUS (S1201), and transmitting LP-WUS based on the determined overlay sequence (S1202).

[0158] Although not illustrated, the BS can determine the overlay sequence of LP-SS in addition to LP-WUS, and transmit the LP-SS to the UE's first receiver based on the determined overlay sequence. The UE can receive the LP-SS through the first receiver and receive the LP-WUS based on the LP-SS.

[0159] Apart from Figure 7 In addition to the operations described in methods #1 to #3, it can also perform the operations disclosed in those methods.

[0160] Referring to method #2B, an overlay sequence can be used for each OOK symbol or OFDM symbol of LP-WUS. The overlay sequence can be used independently for each symbol. The overlay sequence may or may not include information related to LP-WUS. The information related to LP-WUS can be the same as the information transmitted via the OOK or OFDM symbol of LP-WUS. For example, the information related to LP-WUS may include the UE's ID or the ID of the (sub)group to which the UE belongs, to operate the UE's second receiver. For example, a UE's subgroup may refer to UEs monitoring paging messages at the same paging time, and one or more subgroups can be distinguished based on this criterion. However, this disclosure is not limited to this, and UE subgroups can be distinguished based on another criterion.

[0161] When the overlay sequences are configured to include information related to LP-WUS, each overlay sequence can independently correspond to one or more specific bit values ​​for each symbol. For example, if the number of candidates for the overlay sequence is two, each candidate can correspond to a bit value of 0 or 1, and the overlay sequence for a symbol can represent a 1-bit value. If the number of candidates for the overlay sequence is four, each candidate can correspond to a bit value of 00, 01, 10, or 11, and the overlay sequence for a symbol can represent a 2-bit value. If the number of candidates for the overlay sequence is 2^n, the overlay sequence for a symbol can represent an n-bit value. If the number of candidates for the overlay sequence is not 2^n (e.g., 2^nm), the overlay sequence for a symbol can represent some of the values ​​that can be represented by n bits (e.g., excluding m values ​​from 2^n values). The candidate sequences for the overlay sequence can be generated based on different root sequence indices, or they can be generated based on the same root sequence index and different cyclic shift values.

[0162] When the overlay sequences are configured not to include LP-WUS-related information, each overlay sequence can be configured as a predetermined single sequence. When the overlay sequences include LP-WUS-related information and candidate sequences are generated based on different root sequence indices, a single sequence can be generated based on a specific root sequence index among the different root sequence indices. A specific root sequence index can be, for example, 0. When the overlay sequences include LP-WUS-related information and candidate sequences are generated based on the same root sequence index and different cyclic shift values, a single sequence can be generated based on a specific cyclic shift value among the different cyclic shift values. A specific cyclic shift value can be, for example, 0.

[0163] The DFT of LP-WUS and / or LP-SS can be performed based on method #1. For example, the length of the superimposed sequence can be determined based on the bandwidth and M value of LP-WUS and / or LP-SS.

[0164] The base sequence, sequence transition scheme, and cyclic shift transition scheme can be determined based on method #2 and method #2A.

[0165] Based on method #3, operations can be performed for situations where multiple information bits need to be sent, which is less than the maximum number of information bits that can be sent via LP-WUS and / or LP-SS.

[0166] Examples of using the communication system disclosed herein

[0167] The various descriptions, functions, processes, proposals, methods and / or operation flowcharts of this disclosure can be applied to, but are not limited to, various fields requiring wireless communication / connectivity between devices (e.g., 5G).

[0168] More specific examples will be described below with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise stated, the same reference numerals denote the same or corresponding hardware blocks, software blocks, or functional blocks.

[0169] Figure 8 An example of a communication system 1 applied to this disclosure is shown.

[0170] Reference Figure 8 The communication system 1 applied to this disclosure includes wireless devices, a network (BS), and a network. Wireless devices are devices that perform communication using radio access technology (RAT) (e.g., 5G NR (or new RAT) or LTE), also referred to as communication / radio / 5G devices. Wireless devices may include (but are not limited to) robots 100a, vehicles 100b-1 and 100b-2, extended reality (XR) devices 100c, handheld devices 100d, home appliances 100e, IoT devices 100f, and artificial intelligence (AI) devices / servers 400. For example, vehicles may include vehicles with wireless communication capabilities, autonomous vehicles, and vehicles capable of vehicle-to-vehicle (V2V) communication. In this document, vehicles may include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of head-mounted displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions (TVs), smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices may include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses), and computers (e.g., laptops). Home appliances may include TVs, refrigerators, washing machines, etc. IoT devices may include sensors, smart meters, etc. For example, the BS and network can be implemented as wireless devices, and a particular wireless device 200a can operate as a BS / network node for other wireless devices.

[0171] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can also perform direct communication with each other without BS / network intervention (e.g., sidelink communication). For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., V2V / Vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0172] Wireless communication / connections 150a, 150b, and 150c can be established between wireless devices 100a to 100f / BS 200 and between BS 200. In this document, wireless communication / connections can be established via various RATs (e.g., 5G NR) such as UL / DL communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay or integrated access backhaul (IAB)). Wireless signals can be transmitted and received between wireless devices, between wireless devices and BSs, and between BSs via wireless communication / connections 150a, 150b, and 150c. For example, signals can be transmitted and received via various physical channels via wireless communication / connections 150a, 150b, and 150c. For this purpose, at least a portion of the configuration information for configuring the process of transmitting / receiving wireless signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes can be performed based on various proposals of this disclosure.

[0173] Examples of wireless devices that utilize this disclosure

[0174] Figure 9 A wireless device applicable to this disclosure is shown.

[0175] Reference Figure 9 The first wireless device 100 and the second wireless device 200 can transmit wireless signals via various RATs (e.g., LTE and NR). {The first wireless device 100 and the second wireless device 200} can correspond to... Figure 8 {Wireless Device 100x and BS 200} and / or {Wireless Device 100x and Wireless Device 100x}.

[0176] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and also includes one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. For example, the processor 102 may process information in the memories 104 to generate a first information / signal, and then transmit a wireless signal including the first information / signal via the transceivers 106. The processor 102 may receive a wireless signal including a second information / signal via the transceivers 106, and then store the information obtained by processing the second information / signal in the memories 104. The memories 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memories 104 may store software code including instructions for performing all or part of the processing controlled by the processor 102 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. Processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 106 may be connected to processor 102 and transmit and / or receive wireless signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. Transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In this disclosure, the wireless device may be a communication modem / circuit / chip.

[0177] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and also includes one or more transceivers 206 and / or one or more antennas 208. The processors 202 may control the memories 204 and / or the transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. For example, the processors 202 may process information in the memories 204 to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers 206. The processors 202 may receive wireless signals including fourth information / signals via the transceivers 206, and then store the information obtained by processing the fourth information / signals in the memories 204. The memories 204 may be connected to the processors 202 and store various information related to the operation of the processors 202. For example, the memories 204 may store software code including instructions for performing all or part of the processing controlled by the processors 202 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. Processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 206 may be connected to processor 202 and transmit and / or receive wireless signals via one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. Transceiver 206 may be used interchangeably with an RF unit. In this disclosure, the wireless device may be a communication modem / circuit / chip.

[0178] The hardware elements of wireless devices 100 and 200 will now be described in more detail. One or more protocol layers may be implemented by (but not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as Physical (PHY), Medium Access Control (MAC), Radio Link Control (RLC), Packet Data Convergence Protocol (PDCP), RRC, and Service Data Adaptation Protocol (SDAP). One or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information in accordance with the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document, and provide such messages, control information, data, or information to one or more transceivers 106 and 206. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information, in accordance with the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) and acquire PDUs, SDUs, messages, control information, data, or information from one or more transceivers 106 and 206, in accordance with the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document.

[0179] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 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 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be included in one or more processors 102 and 202 or may be stored in one or more memories 104 and 204 and driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document can be implemented using firmware or software in the form of code, instructions, and / or instruction sets.

[0180] One or more memories 104 and 204 can be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories 104 and 204 can be configured to include read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 can be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 can be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0181] One or more transceivers 106 and 206 may transmit user data, control information, and / or wireless signals / channels mentioned in the methods and / or operation flowcharts of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or wireless signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive wireless signals. For example, one or more processors 102 and 202 may perform control to enable one or more transceivers 106 and 206 to transmit user data, control information, or wireless signals to one or more other devices. One or more processors 102 and 202 may perform control to enable one or more transceivers 106 and 206 to receive user data, control information, or wireless signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document through one or more antennas 108 and 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 and 206 may convert received radio signals / channels from RF band signals to baseband signals for processing by one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, and radio signals / channels processed by one or more processors 102 and 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0182] Examples of the use of wireless devices applying this disclosure

[0183] Figure 10 Another example of a wireless device applied to this disclosure is shown. The wireless device can be adapted according to use cases / services (see reference). Figure 8 It is realized in various forms.

[0184] Reference Figure 10 Wireless devices 100 and 200 can correspond to Figure 9The wireless devices 100 and 200 can be configured to include various elements, components, units / parts, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional component 140. The communication unit 110 may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include... Figure 9 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, transceiver 114 may include Figure 9 The device comprises one or more transceivers 106 and 206 and / or one or more antennas 108 and 208. Control unit 120 is electrically connected to communication unit 110, memory 130, and add-on components 140, and provides overall control of the wireless device. For example, control unit 120 can control the electrical / mechanical operation of the wireless device based on programs / code / instructions / information stored in memory unit 130. Control unit 120 can transmit information stored in memory unit 130 to an external source (e.g., other communication devices) via communication unit 110 through a wireless / wired interface, or store information received from an external source (e.g., other communication devices) via communication unit 110 in memory unit 130 via a wireless / wired interface.

[0185] The add-on component 140 can be configured in various ways depending on the type of wireless device. For example, the add-on component 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device can be configured as (but is not limited to) a robot. Figure 8 100a), vehicles ( Figure 8 100b-1 and 100b-2), XR device ( Figure 8 100c), handheld device ( Figure 8 100d), home appliances ( Figure 8 100e), IoT devices ( Figure 8 100f), digital broadcasting terminals, holographic devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environment devices, AI servers / devices ( Figure 8 400), BS ( Figure 8 This can be achieved through methods such as 200 (network nodes, etc.). Depending on the usage / service, the wireless device can be mobile or fixed.

[0186] exist Figure 10In wireless devices 100 and 200, all elements, components, units / parts, and / or modules can be connected to each other via wired interfaces, or at least a portion thereof can be wirelessly connected via communication unit 110. For example, in each of wireless devices 100 and 200, control unit 120 and communication unit 110 can be wired connected, and control unit 120 and first units (e.g., 130 and 140) can be wirelessly connected via communication unit 110. The various elements, components, units / parts, and / or modules in wireless devices 100 and 200 may also include one or more elements. For example, control unit 120 may be configured using a collection of one or more processors. For example, control unit 120 may be configured using a collection of communication control processors, application processors, electronic control units (ECUs), graphics processing units, and memory control processors. In another example, memory 130 may be configured using RAM, dynamic RAM (DRAM), ROM, flash memory, volatile memory, non-volatile memory, and / or combinations thereof.

[0187] Examples of vehicles or autonomous vehicles that utilize this disclosure

[0188] Figure 11 The present disclosure illustrates a vehicle or autonomous vehicle. The vehicle or autonomous vehicle can be implemented as a mobile robot, car, train, manned / unmanned aerial vehicle (AV), vessel, etc.

[0189] Reference Figure 11 The vehicle or autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive 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 part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to... Figure 10 Blocks 110 / 130 / 140.

[0190] Communication unit 110 can send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. Control unit 120 can perform various operations by controlling the components of the vehicle or autonomous vehicle 100. Control unit 120 may include an ECU. Drive unit 140a enables the vehicle or autonomous vehicle 100 to travel on a road. Drive unit 140a may include an engine, motor, powertrain, wheels, brakes, steering mechanism, etc. Power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and includes wired / wireless charging circuitry, battery, etc. Sensor unit 140c can acquire information about vehicle status, surrounding environment, user information, etc. Sensor unit 140c may include inertial measurement unit (IMU) sensors, collision sensors, wheel sensors, speed sensors, slope sensors, weight sensors, heading sensors, position modules, vehicle forward / reverse sensors, battery sensors, fuel sensors, tire sensors, steering sensors, temperature sensors, humidity sensors, ultrasonic sensors, lighting sensors, pedal position sensors, etc. Autonomous driving unit 140d can implement technologies for maintaining the vehicle within its lane, technologies for automatically adjusting speed (e.g., adaptive cruise control), technologies for autonomously driving along a determined path, and technologies for automatically setting a route if a destination is set, etc.

[0191] For example, communication unit 110 can receive map data, traffic information data, etc., from an external server. Autonomous driving unit 140d can generate autonomous driving routes and driving plans from the acquired data. Control unit 120 can control drive unit 140a, enabling the vehicle or autonomous driving vehicle 100 to move along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, communication unit 110 can acquire recent traffic information data from an external server non-periodically / periodically, and acquire surrounding traffic information data from nearby vehicles. During autonomous driving, sensor unit 140c can acquire information about vehicle status and / or surrounding environment. Autonomous driving unit 140d can update the autonomous driving route and driving plan based on newly acquired data / information. Communication unit 110 can transmit information about vehicle location, autonomous driving route, and / or driving plan to an external server. The external server can use AI technology to predict traffic information data based on information collected from the vehicle or autonomous driving vehicle, and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0192] Those skilled in the art will understand that this disclosure may be implemented in other specific ways besides those set forth herein without departing from the spirit and essential characteristics of this disclosure. Therefore, the above embodiments are to be construed as illustrative in all respects and not restrictive. The scope of this disclosure should be determined by the appended claims and their legal equivalents (rather than the foregoing description), and all changes falling within the meaning and scope of the appended claims are intended to be covered therewith.

[0193] Industrial applicability

[0194] As stated above, this disclosure applies to various wireless communication systems.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising the following steps: The UE receives a low-power wake-up signal LP-WUS through its first receiver. as well as The second receiver of the UE is based on the LP-WUS reception operation. Among them, a superposition sequence for the LP-WUS is used. Based on the fact that the superimposed sequences are configured to include information related to the LP-WUS, each superimposed sequence in the superimposed sequences is configured as one of a plurality of candidate sequences, and the candidate sequences are sequences based on different root sequence indices or different cyclic shift values, and Based on the fact that the superimposed sequences are configured to exclude the information associated with the LP-WUS, each superimposed sequence in the superimposed sequences is configured as a predetermined single sequence, and the single sequence is a predetermined specific sequence among the plurality of candidate sequences.

2. The method of claim 1, wherein, The information associated with the LP-WUS includes the UE's identifier ID or the ID of the group to which the UE belongs, and the UE's ID or the group's ID is used to operate the UE's second receiver.

3. The method of claim 1, wherein, Based on the fact that the superimposed sequence is configured to include the information associated with the LP-WUS, the candidate sequence is a sequence based on different root sequence indices, and The overlay sequence is configured to exclude the information associated with the LP-WUS, and the individual sequence is a sequence based on a specific root sequence index among the different root sequence indices.

4. The method of claim 3, wherein, The specific root sequence index is 0.

5. The method of claim 1, wherein, Based on the fact that the superimposed sequence is configured to include the information associated with the LP-WUS, the candidate sequence is a sequence based on the same root sequence index and the different cyclic shift values, and The superimposed sequence is configured to exclude the information associated with the LP-WUS, and the individual sequence is a sequence based on a specific cyclic shift value among the different cyclic shift values.

6. The method of claim 5, wherein, The specific cyclic shift value is 0.

7. The method of claim 1, further comprising the step of: Receive information from the base station (BS) regarding whether the overlay sequence includes information related to the LP-WUS.

8. A user equipment (UE) operating in a wireless communication system, the UE comprising: First transceiver and second transceiver; At least one processor; as well as At least one memory, operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform a specific operation. The specific operations include: The UE receives a low-power wake-up signal LP-WUS through its first receiver; and The second receiver of the UE is based on the LP-WUS reception operation. Among them, a superposition sequence for the LP-WUS is used. Based on the fact that the superimposed sequences are configured to include information related to the LP-WUS, each superimposed sequence in the superimposed sequences is configured as one of a plurality of candidate sequences, and the candidate sequences are sequences based on different root sequence indices or different cyclic shift values, and based on the superposition sequence being configured to include the information related to the LP-WUS, each of the superposition sequences is configured to be a sequence based on a different root sequence index or a different cyclic shift value, and 9. The UE of claim 8, wherein, based on the superposition sequence being configured to not include the information related to the LP-WUS, each of the superposition sequences is configured to be a predetermined single sequence, and the single sequence is a predetermined particular sequence among the multiple candidate sequences.

10. The UE of claim 8, wherein, The particular root sequence index is 0. based on the superposition sequence being configured to include the information related to the LP-WUS, each of the superposition sequences is configured to be a sequence based on a same root sequence index and the different cyclic shift values, and 11. The UE of claim 10, wherein, based on the superposition sequence being configured to not include the information related to the LP-WUS, each of the superposition sequences is configured to be a predetermined single sequence, and the single sequence is a predetermined particular sequence among the multiple candidate sequences.

12. The UE of claim 8, wherein, The particular cyclic shift value is 0. The particular operations further include receiving, from a base station (BS), information about whether the superposition sequence includes the information related to the LP-WUS.

13. The UE of claim 12, wherein, 15. An apparatus for a user equipment (UE), the apparatus comprising:

14. The UE of claim 8, wherein, at least one processor; and at least one computer memory operably connectable to the at least one processor and configured to, working with the at least one processor, cause the at least one processor to perform operations, wherein the operations comprise: receiving, by a first receiver of the UE, a low power-wakeup signal (LP-WUS); and operating, based on the receiving of the LP-WUS, a second receiver of the UE, wherein a superposition sequence for the LP-WUS is used, based on the superposition sequence being configured to include information related to the LP-WUS, each of the superposition sequences is configured to be one of a plurality of candidate sequences, and the candidate sequences are sequences based on different root sequence indices or different cyclic shift values, and based on the superposition sequence being configured to not include the information related to the LP-WUS, each of the superposition sequences is configured to be a predetermined single sequence, and the single sequence is a predetermined particular sequence among the multiple candidate sequences.

16. A non-transitory computer-readable storage medium comprising at least one computer program that causes a user equipment (UE) comprising at least one processor to perform operations comprising: receiving, by a first receiver of the UE, a low power-wakeup signal (LP-WUS); and operating, based on the receiving of the LP-WUS, a second receiver of the UE, wherein a superposition sequence for the LP-WUS is used, ​ ​ wherein the superposition sequences for the LP-WUS are configured to include information related to the LP-WUS, based on the superposition sequences being configured to include the information related to the LP-WUS, each of the superposition sequences is configured to one of a plurality of candidate sequences, and the candidate sequences are sequences based on different root sequence indices or different cyclic shift values, and based on the superposition sequences being configured to not include the information related to the LP-WUS, each of the superposition sequences is configured to a predetermined single sequence, and the single sequence is a predetermined particular sequence among the plurality of candidate sequences. 17.A method performed by a base station (BS) in a wireless communication system, the method comprising: determining, for a first receiver of a user equipment (UE), superposition sequences for a low power-wakeup signal (LP-WUS); and transmitting the LP-WUS based on the superposition sequences, wherein based on the superposition sequences being configured to include information related to the LP-WUS, each of the superposition sequences is configured to one of a plurality of candidate sequences, and the candidate sequences are sequences based on different root sequence indices or different cyclic shift values, and based on the superposition sequences being configured to not include the information related to the LP-WUS, each of the superposition sequences is configured to a predetermined single sequence, and the single sequence is a predetermined particular sequence among the plurality of candidate sequences. 18.A base station (BS) operating in a wireless communication system, the BS comprising: at least one transceiver; at least one processor; and at least one memory operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform certain operations, wherein the certain operations comprise: determining, for a first receiver of a user equipment (UE), superposition sequences for a low power-wakeup signal (LP-WUS); and transmitting the LP-WUS based on the superposition sequences, wherein based on the superposition sequences being configured to include information related to the LP-WUS, each of the superposition sequences is configured to one of a plurality of candidate sequences, and the candidate sequences are sequences based on different root sequence indices or different cyclic shift values, and based on the superposition sequences being configured to not include the information related to the LP-WUS, each of the superposition sequences is configured to a predetermined single sequence, and the single sequence is a predetermined particular sequence among the plurality of candidate sequences.

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