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

Abstract

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

Description

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

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

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

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

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

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

[0006] As an aspect of the present invention, a method performed by a terminal in a wireless communication system is provided, comprising: receiving a LP-WUS (Low Power-Wake Up Signal) through a first receiver of the terminal; and operating a second receiver of the terminal based on reception of the LP-WUS; wherein overlaid sequences for the LP-WUS are used, and based on the overlaid sequences being set to include information associated with the LP-WUS, the overlaid sequences are each set to one of a plurality of candidate sequences, the candidate sequences are sequences based on different root sequence indices or different cyclic shift values, and based on the overlaid sequences being set not to include information associated with the LP-WUS, the overlaid sequences are each set to a single, predetermined sequence, and the single sequence is a specific, predetermined sequence among the plurality of candidate sequences.

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

[0008] In another aspect of the present invention, a method performed by a base station in a wireless communication system is provided, comprising: determining overlay sequences for a LP-WUS (Low Power-Wake Up Signal) for a first receiver of a terminal; transmitting the LP-WUS based on the overlay sequences; wherein, based on the overlay sequences being set to include information associated with the LP-WUS, each of the overlay sequences is set to one of a plurality of candidate sequences, the candidate sequences being sequences based on different root sequence indices or different cyclic shift values, and based on the overlay sequences being set not to include information associated with the LP-WUS, each of the overlay sequences is set to a single, predetermined sequence, the single sequence being a specific, predetermined sequence among the plurality of candidate sequences.

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

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

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

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

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

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

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

[0016] Figures 3 to 7 are drawings for explaining a signal transmission and reception method according to an embodiment of the present invention.

[0017] Figures 8 to 11 illustrate devices according to embodiments of the present invention.

[0018] The following technologies can be used in various wireless access systems, such as CDMA, FDMA, TDMA, OFDMA, and SC-FDMA. CDMA can be implemented using wireless technologies such as UTRA (Universal Terrestrial Radio Access) or CDMA2000. TDMA can be implemented using wireless technologies such as GSM (Global System for Mobile communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented using wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (Evolved UTRA). UTRA is a part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) is a part of E-UMTS (Evolved UMTS) that uses E-UTRA, and LTE-A (Advanced) / LTE-A pro is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0019] For clarity, the description is based on a 3GPP communication system (e.g., LTE, NR), but the technical idea of ​​the present invention is not limited thereto. LTE refers to technology after 3GPP TS 36.xxx Release 8. Specifically, LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A, and LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro. 3GPP NR refers to technology after TS 38.xxx Release 15. LTE / NR may be referred to as a 3GPP system. "xxx" refers to a standard document detail number. LTE / NR may be collectively referred to as a 3GPP system. For background technology, terms, abbreviations, etc. used in the description of the present invention, reference may be made to matters described in standard documents published prior to the present invention. For example, reference may be made to the following documents.

[0020] 3GPP NR

[0021] - 38.211: Physical channels and modulation

[0022] - 38.212: Multiplexing and channel coding

[0023] - 38.213: Physical layer procedures for control

[0024] - 38.214: Physical layer procedures for data

[0025] - 38.300: NR and NG-RAN Overall Description

[0026] - 38.331: Radio Resource Control (RRC) protocol specification

[0027] Figure 1 illustrates the structure of a radio frame used in NR.

[0028] In NR, uplink (UL) and downlink (DL) transmissions are structured as frames. A radio frame is 10ms long and is defined as two 5ms half-frames (HF). Each half-frame is defined as five 1ms subframes (SF). A subframe is divided into one or more slots, and the number of slots in a subframe depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 OFDM(A) symbols, depending on the cyclic prefix (CP). When normal CP is used, each slot contains 14 symbols. When extended CP is used, each slot contains 12 symbols. Here, the symbols can include OFDM symbols (or CP-OFDM symbols), SC-FDMA symbols (or DFT-s-OFDM symbols).

[0029] Table 1 illustrates that when CP is normally used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.

[0030] [Table 1]

[0031]

[0032] Table 2 illustrates that when extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.

[0033] [Table 2]

[0034]

[0035] In an NR system, OFDM(A) numerology (e.g., SCS, CP length, etc.) may be set differently between multiple cells that are merged into a single user equipment (UE). Accordingly, the (absolute time) interval of a time resource (e.g., SF, slot, or TTI) (conveniently referred to as TU (Time Unit)) consisting of the same number of symbols may be set differently between the merged cells.

[0036] NR supports multiple Orthogonal Frequency Division Multiplexing (OFDM) numerologies (e.g., subcarrier spacing, SCS) to support various 5G services. For example, a 15 kHz SCS supports wide areas in traditional cellular bands, while a 30 kHz / 60 kHz SCS can support dense urban areas, lower latency, and wider carrier bandwidth.

[0037] The NR frequency band is defined by two types of frequency ranges (FR) (FR1 / FR2). FR1 / FR2 can be configured as shown in Table 3 below. FR2 can also refer to millimeter wave (mmW).

[0038] [Table 3]

[0039]

[0040] Figure 2 illustrates the slot structure of an NR frame.

[0041] A slot contains multiple symbols in the time domain. For example, for a normal CP, one slot contains 14 symbols, and for an extended CP, one slot contains 12 symbols. A carrier contains multiple subcarriers in the frequency domain. An RB (Resource Block) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. Multiple RB interlaces (simply, interlaces) can be defined in the frequency domain. An interlace m ∈ {0, 1, ..., M-1} can be composed of (common) RBs {m, M+m, 2M+m, 3M+m, ...}. M represents the number of interlaces. A BWP (Bandwidth Part) is defined as multiple consecutive RBs (e.g., physical RBs, PRBs) in the frequency domain, and can correspond to one OFDM numerology (e.g., SCS(u), CP length, etc.). A carrier can contain up to N (e.g., 5) BWPs. Data communication is performed through activated BWPs, and only one BWP can be activated for a single terminal within a single cell / carrier. Each element in the resource grid is referred to as a Resource Element (RE), to which a single modulation symbol can be mapped.

[0042] In a wireless communication system, a terminal receives information from a base station via the downlink (DL), and the terminal transmits information to the base station via the uplink (UL). The information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels / signals exist depending on the type / purpose of the information they transmit and receive. A physical channel corresponds to a set of resource elements (REs) that carry information derived from a higher layer. A physical signal corresponds to a set of resource elements (REs) used by the physical layer (PHY), but does not carry information derived from a higher layer. The higher layers include the Medium Access Control (MAC) layer, the Radio Link Control (RLC) layer, the Packet Data Convergence Protocol (PDCP) layer, and the Radio Resource Control (RRC) layer.

[0043] DL physical channels include Physical Broadcast Channel (PBCH), Physical Downlink Shared Channel (PDSCH), and Physical Downlink Control Channel (PDCCH). DL physical signals include DL Reference Signal (RS), Primary Synchronization Signal (PSS), and Secondary Synchronization Signal (SSS). DL RS includes Demodulation RS (DM-RS), Phase-tracking RS (PT-RS), and Channel-state information RS (CSI-RS). UL physical channels include Physical Random Access Channel (PRACH), Physical Uplink Shared Channel (PUSCH), and Physical Uplink Control Channel (PUCCH). UL physical signals include UL RS. UL RS includes DM-RS, PT-RS, and Sounding RS (SRS).

[0044] Figure 3 illustrates the SSB structure. Based on SSB, a terminal can perform cell search, system information acquisition, beam alignment for initial access, and DL measurements. SSB is used interchangeably with the SS / PBCH (Synchronization Signal / Physical Broadcast channel) block.

[0045] Referring to Figure 3, SSB is composed of PSS, SSS, and PBCH. SSB is composed of four consecutive OFDM symbols, and PSS, PBCH, SSS / PBCH, and PBCH are transmitted for each OFDM symbol. PSS and SSS are each composed of one OFDM symbol and 127 subcarriers, and PBCH is composed of three OFDM symbols and 576 subcarriers. Polar coding and QPSK (Quadrature Phase Shift Keying) are applied to PBCH. PBCH is composed of data RE and DMRS (Demodulation Reference Signal) RE for each OFDM symbol. There are three DMRS REs for each RB, and three data REs exist between DMRS REs.

[0046] In the present invention, the base station may be, for example, a gNodeB.

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

[0048] The contents discussed above can be applied in combination with the methods proposed in the present invention described below, or can be supplemented to clarify the technical features of the methods proposed in the present invention.

[0049] In addition, the methods described below can be equally applied to the NR system (licensed band) or shared spectrum described above, and the technical ideas proposed in this specification can be modified or replaced to fit the terms, expressions, structures, etc. defined in each system so that they can be implemented in the corresponding systems.

[0050] In the Rel-18 NR standard, discussions are underway to introduce a low power wake-up signal (LP-WUS) and a separate receiver that can receive it, LP-WUR (low power wake-up receiver or low power wake-up radio), as a power consumption reduction method that is slightly different from the terminal power consumption reduction techniques introduced / supported in Rel-16 / 17, etc. When expressing the receiver in the terminal (receiver in the downlink) in the existing NR system as MR (Main radio / receiver), LP-WUR means a separate receiver (i.e. companion radio / receiver) that can be introduced to reduce the power consumption of the MR. LP-WUR can be simply expressed as LR.

[0051] Below, we describe options for generating LP-WUS waveforms. These can be understood as different methods for generating MC-OOK (Multi-carrier On-Off Keying) and MC-FSK (Multi-carrier Frequency Shift Keying) waveforms.

[0052] Figures 3 and 4 illustrate options for the LP-WUS waveform generation method.

[0053] Figures 3 and 4 relate to MC-ASK (amplitude shift keying) waveform generation. In Figures 3 and 4, K is the iFFT (inverse fast Fourier transform) size of CP-OFDMA (Cyclic Prefix-Orthogonal Frequency Division Multiplexing Access), and N is the number of subcarriers used in LP-WUS, including potential guard bands.

[0054] Figure 3 shows option OOK-1.

[0055] In option OOK-1, one OFDM symbol contains a single bit. For the subcarriers of LP-WUS, OOK=1 means that all subcarriers are modulated. OOK=0 means that all subcarriers are at zero power (from the baseband perspective).

[0056] Figure 4 shows option OOK-5.

[0057] Referring to Fig. 4, in option OOK-4, an M-bit OOK in the time domain is transformed. N subcarriers of OOK-1 are generated by a transformation (DFT / Least Square). N' samples are generated from the M bits. Signal modification may or may not be used. Truncation or other additional modifications may or may not be used. If not used, N and N' are the same. N' can be equal to K.

[0058] In FIGS. 3 and 4, the modulated subcarriers may be, for example, QAM (Quadrature Amplitude Modulation) symbols, sequences, or other signals.

[0059] The subcarriers in the potential guard band are zero power (from the baseband perspective). Optionally, one of the two additional segments can be always modulated and the other can always be transmitted at zero power (from the baseband perspective).

[0060] Besides OOK-1 and OOK-4, there are OOK-2 and OOK-3 as possible options.

[0061] A symbol modified in the OOK manner may be referred to as an OOK symbol. For convenience of writing below, "OOK-1 and / or OOK-4" may be simply written as "OOK-1 / 4".

[0062] For OOK-1, one OOK symbol can be matched to one OFDM symbol interval, and for OOK-4, M OOK symbols can be mapped to one OFDM symbol interval. Therefore, OOK-1 can transmit 1 bit per OFDM symbol, and OOK-4 can transmit M bits per OFDM symbol. If MC (Manchester encoding) is additionally used for LP-WUS, twice as many OFDM symbols may be required to transmit the same bit. Meanwhile, a terminal (including LP-WUR) that receives LP-WUS can perform an MR wake-up operation. For this purpose, an ID (identifier) ​​that can distinguish each terminal or a (sub)group of terminals can be included in the LP-WUS signal. The UE ID can be (for example) a 5G-S-TMSI value or a value reduced by modulo operation, etc. This value can be approximately 48 bits depending on the ID used. Accordingly, a significant number of OFDM symbols may be used to transmit a UE ID via OOK-1 / 4. For example, assuming the use of MC to transmit a 48-bit UE ID, 96 OFDM symbols are required for OOK-1. When the part containing information such as the UE ID is called the message part of LP-WUS, if a preamble part to assist in receiving the message part is transmitted together, the number of OFDM symbols required may increase. The preamble part can convey information necessary for LR to detect / decode the message part. Fig. 5 shows an example of LP-WUS transmission including a preamble part and a message part.

[0063] If an LP-WUS signal transmitted to a specific terminal (or group of terminals) occupies a specific (frequency / time) channel for a certain period of time, it may result in inefficient use of resources for both the network and the terminal. From the perspective of receiving the LP-WUS signal, it may be vulnerable to interference. Furthermore, if accurate time synchronization is not secured, LP-WUR may have to attempt monitoring for a period of time longer than the actual length of the LP-WUS signal. When the LP-WUS signal is composed of a preamble part and a message part, an effective signal configuration and setting method is required.

[0064] Meanwhile, the LP-WUS signal can use an overlaid sequence together with the OOK waveform. Depending on how the overlaid sequence is overlaid on each OOK signal or OFDM signal, it can affect the LP-WUS transmission time and / or the frequency resources occupied by the LP-WUS. Additionally, if some information is transmitted through the overlaid sequence, this can be a way to expand the utilization of the LP-WUS signal. However, not all LP-WUS can detect / decode the overlaid sequence. If the overlaid sequence modulates each subcarrier in the frequency domain, only LP-WUS that have FFT (Fast Fourier Transform) and / or sequence correlation capability in the frequency domain can receive the overlaid sequence. Even if the sequence is overlaid on each OOK symbol or OFDM symbol in the time domain, only LP-WUS that have sequence correlation capability in the time domain can receive the sequence. Since the lowest complexity LP-WUR may only distinguish ON / OFF of the OOK symbol, the overlay sequence needs to be designed considering these various types of LP-WUR.

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

[0066] As described above, the LP-WUS signal (transmitted by the base station) can be composed of a preamble part and a message part. The preamble part can include information necessary for receiving the message part transmitted subsequently (e.g., data rate, modulation, encoding method of the message part, etc.). Alternatively, the preamble part can include a known sequence / signal without conveying any specific information. Alternatively, a separate known sequence / signal can be transmitted together before or after the preamble part. The message part can carry identification information (for a specific terminal or a (sub)group of terminals), or can simply transmit a wake-up indication for multiple terminals. Alternatively, cell-related information, emergency-related information such as ETWS (Earthquake and Tsunami Warning System) / CMAS (Commercial Mobile Alert System), tracking area, RAN (radio access network) area, SI (system information) change instructions, or system-related information (for a terminal) or paging-related information may be transmitted. In addition to the preamble part and / or the message part, a CRC (Cyclic Redundancy Check) may be transmitted. At this time, the CRC may be generated based on the preamble part and / or the message part. Depending on the setting, the CRC may not be added. Although the proposed methods of the present invention have been described assuming a preamble part, a message part and / or a CRC having such characteristics, they are not necessarily limited to LP-WUS transmission having such a structure.

[0067] In the following proposal, the occasion can mean a TO (transmission occasion) when a base station transmits a signal or a MO (monitoring occasion) when a receiver (such as an LP-WUR) monitors a signal, depending on the context. Since TO means an opportunity for a signal to be transmitted, the signal may not be transmitted at that location (depending on the configuration or the needs of the base station). MO means an opportunity to monitor a signal, so the receiver may not monitor the signal at that location (depending on the configuration or the needs / circumstances of the base station / terminal). In addition, for the convenience of writing, even if it is simply expressed as MO or TO, it can represent MO, TO, or MO and TO depending on the proposal method and context.

[0068] In the proposal below, an LP-WUS opportunity may refer to an opportunity at which the preamble part and / or message part of an LP-WUS may be transmitted. In the proposal below, setting an LP-SS / LP-WUS opportunity may be interpreted to mean setting one or more of the LP-SS / LP-WUS period, starting time, ending time, duration, offset within the period, and frequency at which the corresponding signal is transmitted.

[0069] The following proposal assumes periodically transmitted LP-SS (unless otherwise noted). However, the proposed method and configuration can equally be applied to aperiodically transmitted LP-SS.

[0070] In the following proposal, the preamble part of LP-WUS is described as being intended to convey configuration information for transmission of subsequent message parts, or as including such information transmission part and a known sequence / signal. However, in cases where information for transmission of the message part is conveyed via LP-SS, or where the preamble part is used as a known sequence / signal (without separate information transmission), the preamble or preamble part in the proposed method described below may be replaced with LP-SS.

[0071] In this specification, the symbols '●', '■', '◆', and '▶' listed at the very beginning of each paragraph can indicate vertical / horizontal relationships between descriptions in each paragraph. Specifically, '●', '■', and '◆' can indicate upper categories in that order. For example, '■' listed after '●' can be a supplementary explanation for '●'. '◆' listed after '■' can be a supplementary explanation for '■'. '▶' listed after '◆' can be a supplementary explanation for '◆'.

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

[0073] [Method #1] Information-to-sample mapping (sample-per-bit) before DFT for OOK-4

[0074] The base station can generate LP-WUS / LP-SS with OOK-4 modulation method through blocks such as (for example) Fig. 4.

[0075] At this point, for effective OOK symbol detection at the terminal, each block needs to be specified, including the process of mapping the information bits of LP-WUS / LP-SS to samples in the pre-DFT domain. This refers to sample-per-bit mapping and can correspond to the first step of Figure 4, "M bit to N' sample mapping," or the second step, "signal generation and modification." To this end, this section proposes several methods.

[0076] 1) Transmitter (Entity A):

[0077] ● Sample-per-bit mapping

[0078] ■ When the number of samples (sample-per-bit) in the pre-DFT domain to which each bit transmitted as LP-WUS / LP-SS (wherein OOK-4 with M=1) is mapped is N, the base station can perform sample-per-bit mapping according to the relationship below, based on the number of LP-WUS BW / PRBs and the set M value.

[0079] ◆ When the BW (or number of PRBs) of the set LP-WUS / LP-SS becomes X times, sample-per-bit = X*N is applied.

[0080] ◆ For the BW of the set LP-WUS / LP-SS, if the M value is set to Y times larger, sample-per-bit = N / Y is applied. If N is not a multiple of Y, ceil(N / Y) can be applied.

[0081] ■ The number of samples per bit above can be the (overlaid) sequence length mapped to each bit in the domain prior to DFT.

[0082] ■ The above N refers to the number of samples of the OOK / OFDM symbol (or 1 / K times the number of samples), and this value can be the number excluding CP or the number including CP. The number of N can be scaled according to the SCS. For example, if the SCS increases, the value of N can be scaled up.

[0083] ■ For example, when 5MHz BW, M=1 is set, if the number of samples mapped to 1 bit in the DFT pre-stage or the (overlaid) sequence length is L,

[0084] ◆ At 10MHz BW, 2*L samples per bit or a sequence of length 2*L is used.

[0085] ◆ For the same BW and OOK-4 with M=4, N / 4 samples per bit or a sequence of length N / 4 are used.

[0086] ■ If BW (or PRB number) is defined / set to increase at the same rate as M increases, the sample per bit can be defined / set to one specific value.

[0087] ■ The above N, BW, number of PRBs, M, X, Y, L, etc. may be defined in advance or set / indicated through upper layer parameters such as RRC, SIB, etc., or set / indicated (by the base station to the terminal) through a preamble or LP-SS.

[0088] ■ The method of changing the bit mapping per sample or a specific value, whether N includes CP, the scaling method according to SCS, etc. may be defined in advance or set / indicated through upper layer parameters such as RRC, SIB, etc., or set / indicated (by the base station to the terminal) through a preamble or LP-SS.

[0089] ● DFT (or Least square) size

[0090] ■ For the DFT of Fig. 4, as in the current NR UL, a multiple of 1 PRB (=12 RE) can be used.

[0091] ■ Meanwhile, in order to reduce the complexity of the base station / terminal and to achieve simple 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.

[0092] ◆ For example, if the DFT size is applied as 256, the number of samples per OOK symbol (=N') can be 256 / 128 / 64 respectively according to M = 1 / 2 / 4. In addition, the length of the overlaid OFDM sequence can also be a power of 2 (i.e., a value in the form of 2^B (e.g. 256 / 128 / 64 or 32 / 16 ...).

[0093] ● 'Truncation N'->N and modification' block (and / or 'signal generation and modification' block)

[0094] ■ If the BW (or PRB number) allocated / set to LP-WUS / LP-SS is a multiple of RB (i.e., 12 RE) (=number#1), the samples per bit can also be a multiple of RB (=number#2).

[0095] ◆ At this time, the DFT size can also be a multiple of RB (i.e., 12 RE) (= number#3). For example, number#1, number#2, and number#3 can all be the same value.

[0096] ◆ Meanwhile, (if the DFT (or Least square) size is a power of 2), zero-padding may be performed in the 'signal generation and modification' block and / or truncation may be performed in the 'Truncation N'->N and modification' block. Zero-padding may be, for example, a process of adding "number#2 - number#3" 0s to the front (or back) of the number#3 samples to create number#2 samples. Truncation may be, for example, a process of excluding "number#2 - number#1" results from the front (or back) of the number#2 DFT results to leave only the number#1 result. Alternatively, it may be a process of excluding half of "number#2 - number#1" results from the front and back of the number#2 DFT results to leave only the number#1 result.

[0097] 2) Receiver (Entity B):

[0098] ● The above-mentioned operation of the base station directly (explicitly) setting / instructing or applying / assuming a specific parameter to the terminal can be replaced with an operation of the terminal directly (explicitly) setting / instructing or applying / assuming the parameter from the base station.

[0099] ● The operation of the above base station indirectly (implicitly) setting / instructing or applying / assuming a specific parameter (=parameter #1) to the terminal through another specific parameter (=parameter #2) or a specific operation / mode can be replaced with an operation of the terminal indirectly (implicitly) setting / instructing or applying / assuming parameter #1 from the base station through parameter #2 or the above specific operation / mode.

[0100] ● The terminal can understand how LP-WUS / LP-SS is transmitted by pre-configuring or assuming / defining the transmission method of the base station, and can thus receive / monitor LP-WUS / LP-SS in the required time / frequency resources.

[0101] [Method #2] OOK Symbol Generation and / or Overlaid OFDM Sequence Design

[0102] A sequence that can be used when generating an OOK symbol for LP-WUS / LP-SS means, for example, a sequence in which each information bit is mapped for each time segment when LP-WUS / LP-SS is generated through OOK-4 modulation, or an overlaid OFDM sequence to be transmitted together with the OOK / OFDM symbol generated in this way. To generate a sequence that can be used when generating an OOK symbol for LP-WUS / LP-SS, a PN (Pseudo-random) sequence, a ZC sequence, an m-sequence, a Gold sequence, etc. defined for the PUCCH or SRS of the conventional NR can be used. Through this, inter-cell interference that may occur during LP-WUS / LP-SS transmission and reception can be mitigated. The base sequence setting / determination method of the PN sequence or ZC sequence defined in S5.2 of 3GPP TS 38.211 document, the sequence group hopping based on this, the sequence number hopping (within the sequence group), and the hopping method based on cyclic shift can be used as is or modified for the sequence of LP-WUS / LP-SS.

[0103] 1) Transmitter (Entity A) and / or Receiver (Entity B):

[0104] ● In the sequence generation method described below, the base sequence can be the PN sequence defined in S5.2 of the current 3GPP TS 38.211 document. However, it is not necessarily limited to this, and the base sequence can also be a sequence generated in a similar manner (for example, a sequence generated based on Cell-ID, slot / symbol index, and separately set hopping ID and m-sequence or Gold sequence).

[0105] ■ (Method 1) Method of using the same sequence as PUCCH (S6.3.2.2 of 3GPP TS 38.211 document)

[0106] ◆ Sequence group (U) and sequence number (V) can be determined as a function of cell ID (or hoppingId), slot index, and hop index. However, separate RRC parameters can be defined / configured to replace hoppingId, pucch-GroupHopping, and intraSlotFrequencyHopping in S6.3.2.2 of 3GPP TS 38.211 document.

[0107] ◆ CS (cyclic shift) can be determined as a function of slot index, symbol index, and cell ID (or hoppingId) for PN sequence initialization. However, a separate RRC parameter can be defined / configured to replace hoppingId in S6.3.2.2 of 3GPP TS 38.211 document.

[0108] ■ (Method 2) A method of using a sequence determination method modified to fit LP-WUS / LP-SS from the method described in PUCCH (i.e., 38.211, 6.3.2.2)

[0109] ◆ Sequence group (U) and sequence number (V) can be the same as method 1 except for the modifications below.

[0110] ▶ Method 2-1: The hop index is set to 0.

[0111] ▶ Method 2-2: The hop index is determined as '0' if the OFDM symbol in the slot where LP-WUS / LP-SS is transmitted is 0 to [6], and '1' if it is [7] to 13 (or determined only by the index of the starting OFDM symbol of LP-WUS / LP-SS). In other words, OFDM symbols in the slot where LP-WUS / LP-SS is transmitted are grouped, and the hop index is determined as 0 or 1 for each group (e.g. symbol 0 to 6 = hop index 0, symbol 7 to 13 = hop index 1).

[0112] ▶ Method 2-3: U, V are determined as a function of at least one of the slot index, OFDM symbol index, and OOK symbol index (without hop index or when hop index = 0). For example, without a hop index or when the hop index is 0, U, V are determined as a function of the slot index and OFDM symbol index. Alternatively, without a hop index or when the hop index is 0, U, V are determined as a function of the slot index, OFDM symbol index, and OOK symbol index.

[0113] ◆ CS is determined as a function of at least one of the slot index, OFDM symbol index, and OOK symbol index. For example, CS is determined as a function of only the slot index without the OFDM symbol index. For example, CS is determined as a function of the slot index, OFDM symbol index, and OOK symbol index.

[0114] ● In the above proposal, U / V / CS values, etc. can be defined in advance or set (by the base station to the terminal) through upper layer parameters such as RRC and SIB.

[0115] ● In the sequence generation method described above, some of the variables that determine the U, V, CS values, etc. may be set to fixed values ​​(e.g., 0 or 1) and the proposed method may be applied. Alternatively, the proposed method may be applied with some of the variables omitted.

[0116] ● The above described sequence can be used as a sequence for generating OOK symbols for LP-WUS and / or LP-SS transmission and / or as an overlaid OFDM sequence for the LP-WUS / LP-SS.

[0117] ■ For example, the sequence described above can be used as a sequence for generating an OOK symbol for LP-SS transmission.

[0118] ■ For example, the sequence described above can be used as a sequence overlaying an OOK symbol for LP-WUS transmission.

[0119] [Method #2A] How to determine the base sequence or circular shift value of an overlay sequence

[0120] The ZC sequence applied to NR signals is described in S5.2 and S6.3.2.2 of 3GPP TS 38.211. The base sequence and cyclic shift are determined depending on the type of signal / channel and time / frequency resources in which the sequence is used.

[0121] The base sequence and / or CS (cyclic shift) value of the ZC sequence can be determined according to the OFDM symbol index and slot index in which the corresponding signal (e.g., PUCCH) is transmitted. Meanwhile, since the LP-WUS signal (carrying one LP-WUS msg) can be transmitted through multiple OFDM symbols (or can be transmitted across two slots), if the conventional generation method of the 3GPP TS 38.211 document is applied as is, the base sequence or CS value is not determined to a single value in one LP-WUS signal. Since the benefit obtained by transmitting one LP-WUS while changing two or more base sequences or CS values ​​is not clear, and on the other hand, it can only increase the implementation complexity of the base station and terminal that transmit and receive the LP-WUS, the base sequence and CS value applied to the overlay sequence of the LP-WUS need to be determined in units of multiple OFDM symbols in which the LP-WUS is transmitted. Assuming that LP-WUS is transmitted over N OFDM symbols (where each OFDM symbol index can be denoted as index(k), ..., index(k+N-1)), one of the following two methods can be used.

[0122] ● Method A: A method of determining one base sequence and / or CS value based on the smallest value among N OFDM symbol indices (or the index of the fastest OFDM symbol among OFDM symbols in which the corresponding LP-WUS is transmitted) and applying the same value to N OFDM symbols in which the corresponding LP-WUS is transmitted.

[0123] ■ For example, for l or l', which means an OFDM symbol index for determining a base sequence or CS value, the first OFDM symbol index of LP-WUS is used for all N OFDM symbols in which LP-WUS is transmitted, so that a base sequence or CS value for an overlay sequence can be determined.

[0124] ● Method B: N OFDM symbols can be assumed as a 'symbol group' and a symbol group index can be introduced (or a slot group can be introduced). This is a method of determining one base sequence and / or CS value based on the symbol group index and applying the same value to N OFDM symbols in which the LP-WUS is transmitted.

[0125] ■ For example, in the formula that determines the base sequence or CS value, it means the slot index (within the radio frame). (n_(s,f)^μ) can be replaced with a symbol group index (within a radio frame), and the base sequence or CS value for the LP-WUS overlay sequence can be determined. At this time, the size or position (within the frame) of the symbol group can be defined in advance or set through upper layer parameters (e.g., RRC, SIB).

[0126] ● In the formula for determining the base sequence or CS value, other parameters except n_(s,f)^μ, l, l' can be used as 0, 1, or a (configurable) constant to determine the base sequence or CS value for the LP-WUS overlay sequence.

[0127] For convenience of explanation, the proposed method has been described with reference to the ZC sequence for PUCCH described in Section 6.2.2 of the 3GPP TS 38.211 document. However, the method of applying the same value to multiple OFDM symbols in which LP-WUS is transmitted using the index of the first OFDM symbol of LP-WUS, as in Method A, or the method of grouping multiple OFDM symbols in which LP-WUS is transmitted into 'symbol groups' and using the index for these to determine the base sequence or CS value, as in Method B, can be similarly applied to any ZC sequence. For example, the NR specifications such as 38.211 specify the ZC sequences used for DMRS in PUCCH, DMRS in PUSCH, SRS, etc., and the method of determining the base sequence or cyclic shift value for these. In the specified method, only the part that applies the index or slot index for each OFDM symbol can be changed like Method A or Method B, so that the ZC sequence used as the overlay sequence of LP-WUS can be determined.

[0128] Table 4 is part of the summary of the agreed upon actions at the RAN1 standardization meeting.

[0129] When K (K>1) LP-WUS MOs are configured for each beam in an LO, one of the following is selected: ● Option A: K LP-WUS MOs for a beam are divided into M (M>=1) groups of R LP-WUS MOs. A UE monitors all or some of the MO(s) within the K LP-WUS MOs. ■ For each group of R LP-WUS MOs, the same LP-WUS information is transmitted. ■ How the same LP-WUS information is transmitted within the R LP-WUS MOs requires further discussion (FFS how the same LP-WUS information is transmitted in the R LP-WUS MOs). ■ Different LP-WUS information can be transmitted in different groups of R LP-WUS MOs. ■ M = 1 and M > 1 is supported.■ FFS: detailed UE monitoring behavior■ FFS R=1 or R>= 1● Option B: K LP-WUS MOs for a beam are divided into G (G>=1) groups, each containing R*M (M>=1) LP-WUS MOs. A UE monitors all or some of the MO(s) within one group of R*M LP-WUS MOs based on its subgroup ID. ■ Each group of R*M LP-WUS MOs is further divided into M groups of R LP-WUS MOs. ◆ For each group of R LP-WUS MOs, the same LP-WUS information is transmitted. ◆ How the same LP-WUS information is transmitted in the R LP-WUS MOs requires further discussion. ◆ Different LP-WUS information is transmitted between the R LP WUS MOs. Different LP-WUS information can be transmitted in different groups of R LP-WUS MOs.◆ FFS: detailed UE monitoring behavior■ M = 1 and M > 1 is supported.■ FFS R=1 or R>=1■ Note: This achieves the same purpose as "Option 3: UEs monitoring the same PO are divided into multiple sets of subgroups, with UEs within each set of subgroups monitoring the same LO."

[0130] LP-WUS transmission method and terminal operation assumed by the proposal of [Method #2A]

[0131] ● The terminal can monitor / receive LP-WUS at an LO (LP-WUS occasion) that can be set (by the base station) or calculated / determined (by the terminal), and each LO can be composed of multiple LMOs (LP-WUS monitoring occasions). The LMO can mean a resource (e.g., time domain resource, i.e., OFDM symbol(s) or OOK symbol(s)) through which one LP-WUS msg (=message) is transmitted. In this case, one LP-WUS msg can mean a unit for transmitting a wake-up instruction for one or more terminal groups (e.g., subgroup(s) of terminals monitoring the same PO) or a specific terminal. When LP-WUS is transmitted in multiple beams, each beam can be transmitted through one or more LMOs, and transmission of all beams can be performed at least once through one LO.

[0132] ● Among the multiple LMOs constituting the LO, one or more (e.g., K) LMOs corresponding to each beam (or set for each beam) can be used to repeatedly transmit the single LP-WUS msg, and / or, can be used to transmit two or more different LP-WUS msgs. For example, when the number of LMOs corresponding to one beam among the multiple LMOs constituting the LO is K, K=M*R, where M represents the number of different LP-WUS msgs, and R represents the number of times one LP-WUS msg is repeatedly transmitted. That is, M different LP-WUSs can be repeatedly transmitted R times through M*R LMOs corresponding to each beam in the LO. In this case, the terminal monitoring / receiving the LP-WUS can be set to monitor all K LMOs for each beam.

[0133] ● Alternatively, the K LMOs corresponding to the above one beam may be divided into G different groups, and the LMOs of each group may be composed of K=M*R LMOs as above (i.e., M different LP-WUS msgs and R LMOs for repeated transmission). In this case, the terminal monitoring / receiving LP-WUS may be configured to monitor / receive only the LMOs in the group corresponding to the ID (identity) of the terminal among the G groups (i.e., there is no need to monitor the LMOs of the remaining G-1 groups). The ID of the terminal may be determined in various ways, for example, it may mean the index of the subgroup (corresponding to one or more POs) to which the terminal belongs in the RRC idle / inactive state, the index of a specific terminal group to which the terminal belongs in the RRC connected state, or the UE ID of the terminal (or a specific value derived therefrom).

[0134] The proposed method described above can be specifically applied to LO and LMO configurations that include some or all of the LO and LMO configurations described above (or LO and LMO configurations according to the RAN1 agreement captured above) (but can also be applied to any LO / LMO configuration as long as the basic principles of the proposal are not changed).

[0135] For example, among multiple LMOs in the LO, K LMOs for a specific beam are divided into G groups (according to the subgroup indexes of the terminals) (wherein each group can be composed of M*R LMOs as described above), and each terminal can monitor only one group of LMOs. In this case, each of the G groups can have a group index set. The base sequence or CS value of the ZC sequence can be determined based on the group index (instead of the symbol index or slot index). The group index of the G groups can be the index of the terminal subgroup corresponding to each group. Alternatively, an index is assigned to all LMOs in the LO (or M*R LMOs in the group), and the assigned index can be used to determine the base sequence or CS value by replacing at least one or more of n_(s,f)^μ, l, or l'. Alternatively, the base sequence or CS value determined based on the lowest index can be used equally for all LMOs.

[0136] As another example, if K LMOs for a specific beam among multiple LMOs in the LO are divided into M groups (according to the LP-WUS msg) (wherein each group can be composed of R LMOs for repeated transmission as described above), a group index can be set for each of the M groups, and the base sequence or CS value of the ZC sequence can be determined based on the corresponding group index (instead of the symbol index or slot index). Alternatively, an index can be assigned to all LMOs in the LO (or R LMOs in the group), and the assigned index can be used to determine the base sequence or CS value by replacing at least one or more of n_(s,f)^μ, l, or l'. Alternatively, the base sequence or CS value determined based on the lowest index can be used equally for all LMOs.

[0137] As another example, if K LMOs for a specific beam among multiple LMOs in the LO are divided into R LMOs (for repeatedly transmitting the same LP-WUS msg), a MO index may be set for each of the R LMOs, and the base sequence or CS value of the ZC sequence may be determined based on the corresponding LMO index (instead of the symbol index or slot index). Alternatively, one base sequence and / or CS value may be applied to the R LMOs for repeatedly transmitting the same LP-WUS msg. For this purpose, the base sequence and / or CS value of the fastest LMO among the R LMOs that are repeatedly transmitted may be applied equally to all LP-WUSs transmitted through the R LMOs. When a base sequence and / or CS value is determined based on the LMO index or the multiple symbol group index or the first OFDM symbol index of the corresponding LP-WUS (as in Method A and Method B above), the determined base sequence and / or CS value can be equally applied to all LP-WUS transmitted through R LMOs.

[0138] If the LMO in LO has a structure that includes all of the above-mentioned G groups, M groups, and R LMOs (for example, G>=1, M>=1, R>=1, and the indices of G groups are denoted by index_g, M groups by index_m, and R LMOs by index_r), at least one of n_(s,f)^μ, l, or l' is replaced by one of index_g, index_m, and index_r, or the sum of two or more of them, and at least one of the replaced index_g, index_m, and index_r can be used to determine the base sequence and / or CS value.

[0139] [Method #2B] How to set up an overlay sequence that does not carry information bits

[0140] Information bits can be transmitted via overlaid OFDM sequences applied to LP-WUS or LP-SS (we will denote this operating mode as mode #0). For example, log2(N) bits can be transmitted by selecting and transmitting one of N candidate overlaid sequences. For example, for 2 bits to be transmitted via overlaid sequences, four sequences s1 to s4 are defined, and bit value '00' can be expressed by s1, bit value '01' by s2, bit value '10' by s3, and bit value '11' by s4. A receiver capable of detecting / decoding overlaid sequences can find the transmitted sequence through a sequence correlator, etc., and detect the bits transmitted through it. Meanwhile, in the operating mode where no information bits are transmitted via the overlay sequence (let's denote this operating mode as mode #1), only one overlay sequence can be defined, since the receiver does not need to detect the transmitted overlay sequence.

[0141] In mode #0, N overlaid sequences can be generated by changing the CS value for a base sequence. The single overlaid sequence used in mode #1 can be set (via a higher-level parameter) to one of the N sequences defined in mode #0. Alternatively, in mode #1, a base sequence with a CS value of 0 among the N sequences defined for mode #0 can be used.

[0142] In mode #0, N overlay sequences can be defined / configured based on N different base sequences. One overlay sequence used in mode #1 can be configured (via a higher-level parameter) as one of the N sequences defined in mode #0. Alternatively, in mode #1, the root index of the base sequence or the sequence group number or the base sequence with the smallest sequence number (within the group) among the N sequences defined for mode #0 can be used as the overlay sequence.

[0143] [Method #3] How to set up when fewer bits are transmitted than the maximum number of information bits that can be transmitted via LP-WUS / LP-SS

[0144] If the number of information bits that a base station can transmit at a time (or continuously) through LP-WUS / LP-SS is K, the BW and / or time domain opportunity for transmitting the LP-WUS / LP-SS can be determined according to K. At this time, if the base station transmits bits less than K (e.g., L bits), the time / frequency resources set according to K can be used as is, but significant L bits can be transmitted first, and KL bits can be transmitted by setting them to '0' (i.e., zero or unmodulated OOK symbols). However, in this case, more resources than those required for actual transmission may be unnecessarily used. To avoid this drawback, the base station can set L ( <K) 비트를 전송할 때는 L에 맞추어 시간 / 주파수 자원을 설정하고, 해당 자원을 통해 LP-WUS / LP-SS를 전송할 수 있다.

[0145] In the proposal described below, the maximum number of bits K may be the maximum number of terminals, terminal groups, or terminal subgroups that can be distinguished through the transmission information of the LP-WUS / LP-SS. Furthermore, the L bits actually transmitted through the LP-WUS / LP-SS may be the distinguishable number of subgroups based on the terminal ID according to the configuration of the base station (or the configuration of the core network).

[0146] The method described below can be applied to LP-WUS / LP-SS modulated to OOK-4, but if LP-WUS / LP-SS is modulated to OOK-1, it is considered as OOK-4 with M=1 and the same method can be applied. The explanation based on some M values ​​in the method described below can be equally applied to any M value (e.g., M=1,2,4,8,...).

[0147] 1) Transmitter (Entity A):

[0148] ● The base station may transmit fewer bits than the maximum number of information bits that can be transmitted via LP-WUS / LP-SS by one of the following methods (or a combination of two or more):

[0149] ■ Alt-1: Transmits a bitmap that can express the maximum number of transmission bits K through K / M (or L) OFDM / OOK symbols.

[0150] ◆ To terminate LP-WUS / LP-SS monitoring early, a method of first transmitting the L bit corresponding to the actual configured subgroup (the same can be applied to the overlaid OFDM sequence that sends 1 bit for each OOK symbol)

[0151] ◆ For example: If up to 8 subgroups can be set, and LP-WUS / LP-SS is transmitted through 8 / M OFDM symbols, if only 6 subgroups are set, 6 bits for the set subgroups can be placed from the front OFDM symbol, and the remaining 2 bits can be placed after that (for example, to convey a value of 0).

[0152] ◆ If the number of valid subgroups decreases due to LP-WUS monitoring deactivation or fallback, the transmission order of bits corresponding to the subgroup may also change to the back.

[0153] ■ Alt-2: Transmits a bitmap that can express only the number of subgroups actually set (i.e., reduces the number of OFDM / OOK symbols required for transmission)

[0154] ■ Alt-3: Instructs wake-up of all terminals through a format that transmits 0 bits.

[0155] ◆ Example: Assuming that LP-WUS / LP-SS is transmitted with preamble and CRC, and that information bits are transmitted via message part (i.e., non-zero bit transmission is transmitted in preamble-message-CRC order / structure), zero bits can be transmitted via preamble-CRC order / structure excluding message part.

[0156] ◆ Example: Alternatively, a bitmap of width K+X bits may be configured with X bits added to the front (or back) of a bitmap of K bits, and wake-up of all terminals may be instructed through the added X bits.

[0157] ● Which of the above methods will be used can be defined in advance or set / indicated through upper layer parameters such as RRC and SIB.

[0158] 2) Receiver (Entity B):

[0159] ● The above-mentioned operation of the base station directly (explicitly) setting / instructing or applying / assuming a specific parameter to the terminal can be replaced with an operation of the terminal directly (explicitly) setting / instructing or applying / assuming the parameter from the base station.

[0160] ● The operation of the above base station indirectly (implicitly) setting / instructing or applying / assuming a specific parameter (=parameter #1) to the terminal through another specific parameter (=parameter #2) or a specific operation / mode can be replaced with an operation of the terminal indirectly (implicitly) setting / instructing or applying / assuming parameter #1 from the base station through parameter #2 or the above specific operation / mode.

[0161] Meanwhile, the present invention is not limited to the transmission and reception of uplink and / or downlink signals. For example, the present invention can also be used in direct communication between terminals. Furthermore, the base station in the present invention may include not only a base station but also a relay node. For example, the base station operations in the present invention may be performed by the base station, but may also be performed by a relay node.

[0162] A-IoT (Ambient Internet of Things)

[0163] A-IoT could be a new type / segment of devices that operate solely on energy harvested from the surrounding environment. For example, A-IoT could refer to a new type of Internet of Things device that is powered by various energy sources harvested from the surrounding environment, such as radio waves, light, motion, and heat.

[0164] For example, active signal generation and / or backscattering may be among the communication technologies considered to achieve low-power operation of A-IoT devices. For example, backscattering is a technique widely used in radio frequency identification (RFID), which allows devices to communicate with a network by reflecting incident waves after modulating them with information to be transmitted. For example, the device may be powered by the incident RF signal or by stored energy.

[0165] For example, IoT devices can be classified into various device types, such as passive, semi-passive, and active, depending on how they store energy and generate transmission signals. For example, a passive device does not have an energy storage device (e.g., a capacitor) and can communicate based on backscatter communication technology. For example, a semi-passive device has an energy storage device and can communicate using backscatter communication technology with the help of the energy storage device. For example, an active device has an energy storage device and can actively generate signals using active RF components and the stored energy to communicate. For example, in the present disclosure, the following three types of IoT devices can be considered. For example, device A can be a device without energy storage and without independent signal generation (e.g., a device that supports backscatter transmission). For example, device B can be a device with energy storage and without independent signal generation (e.g., a device that supports backscatter transmission). In this case, for example, the use of stored energy may involve amplification of the reflected signal. For example, device C may be a device with energy storage and independent signal generation (e.g., a device with an active RF component for transmission).

[0166] For example, the following basic topologies may be considered to support A-IoT devices in indoor and outdoor scenarios. For example, the basic topologies may include direct connections between base stations and A-IoT devices, connections between base stations and intermediate nodes and A-IoT devices, connection support by auxiliary nodes, and / or connections between terminals and A-IoT devices. The basic topologies proposed in this disclosure are merely examples, and the proposals in this disclosure may be extended / applied to other topologies.

[0167] A-IoT devices can be categorized into two types: Type 1 devices, which have a maximum power consumption of approximately 1 uW, are capable of storing energy, do not have an amplification function, and can transmit by backscattering a carrier wave (CW) provided from an external source (e.g., a reader such as a base station or a terminal, or a separate node). Type 2 devices, for example, have a maximum power consumption of approximately several hundred uW, are capable of storing energy, are capable of amplification, and can transmit by backscattering a carrier wave (CW) provided from an external source (e.g., a reader such as a base station or a terminal, or a separate node) or by using a signal generated internally.

[0168] For example, in addition to the above-described classification methods, the type / class of A-IoT devices can be distinguished based on parameters associated with device characteristics (e.g., presence / capacity of energy storage, energy / power consumption, presence / capacity of amplification, presence / capacity of BPF (band-pass filter), supported DL / UL transmission method(s), etc.) or a combination of parameters. Here, for example, BPF capability can be distinguished by 3-dB bandwidth of supported BPF, sharpness, etc., and UL transmission methods can be distinguished by, for example, backscatter UL transmission, UL transmission by internal signal generation, etc.

[0169] In addition, the type / class of A-IoT devices can be subdivided based on parameters associated with the device characteristics (e.g., presence / capacity of energy storage, level of energy / power consumption, presence / capacity of amplification, presence / capacity of band-pass filter (BPF), supported DL / UL transmission method(s), etc.) or a combination of parameters. For example, the above-described Type 2 device can be classified into Type 2a if it performs transmission by backscattering a carrier wave (CW) provided from the outside (e.g., a reader such as a base station or terminal or a separate node), and Type 2b if it performs transmission using a signal generated internally by itself. In this case, Type 2a and 2b can be the same in that they have a maximum power consumption of approximately several hundred microwatts, are capable of energy storage, and have an amplification function.

[0170] LP-WUS can be transmitted and received between A-IoT devices. Specifically, the waveform transmitted from the reader to the A-IoT device may correspond to the waveform proposed through the embodiments of this specification. The A-IoT device may include only LR without MR. Therefore, when the A-IoT device receives LP-WUS, it can perform operations such as initial connection or data transmission / reception through LR instead of triggering (or activating) MR.

[0171] It is clear that the examples of the proposed methods described above can also be considered as a type of proposed methods, as they can be included as one of the implementation methods of the present invention. In addition, the proposed methods described above can be implemented independently, but can also be implemented in the form of a combination (or merge) of some of the proposed methods. Information on whether the proposed methods are applicable (or information on the rules of the proposed methods) can be defined by a rule so that the base station notifies the terminal or the transmitting terminal notifies the receiving terminal through a predefined signal (e.g., a physical layer signal or a higher layer signal).

[0172] Implementation example

[0173] Figure 6 is a flowchart of a signal transmission and reception method according to embodiments of the present invention.

[0174] Referring to FIG. 6, a signal transmission and reception method according to an embodiment of the present invention may be performed by a terminal and may include a step (S501) of receiving a signal through a first receiver, and a step (S503) of performing a specific operation based on the reception of the signal.

[0175] The specific action may be an action by which the terminal triggers a second receiver. Alternatively, if the terminal is an A-IoT device, the action may be an action by which the terminal transmits a response signal based on the signal.

[0176] The above signal may be an LP-SS and / or LP-WUS as described in the present specification. Even if expressed by another name, if the signal is a signal for triggering the operation of another receiver based on the signal being received by a specific receiver or a signal received by an A-IoT device, it may correspond to an LP-WUS as described in the present specification. In addition, even if expressed by another name, if the signal is a signal for synchronizing an LP-WUS, it may correspond to an LP-SS as described in the present specification.

[0177] The first receiver corresponds to a separate receiver (i.e., LP-WUR) for receiving LP-WUS, and the second receiver corresponds to a primary receiver (i.e., MR). The second receiver may be a receiver for receiving a paging signal or a control signal for a paging signal. Alternatively, the second receiver may be a receiver capable of receiving a PDCCH. The specific name may be changed from LP-WUR and MR, but the first receiver is designed to consume relatively less power than the second receiver. The primary receiver may be a receiver of an existing NR system, and even if it is a receiver by a communication system other than an NR system, if it is a receiver that is triggered based on the reception of a signal of another receiver that consumes relatively less power, it may correspond to the primary receiver.

[0178] However, in the case of an A-IoT device, only the first receiver among the first and second receivers may be included.

[0179] In addition to the basic operation of FIG. 6, other operations disclosed in this specification may be combined.

[0180] Figure 7 is a flowchart that further concretizes a signal transmission and reception method according to an embodiment of the present invention.

[0181] Referring to FIG. 7, a signal transmission and reception method from a terminal perspective according to an embodiment of the present invention may be configured to include a step of receiving an LP-WUS through a first receiver (S1203), and a step of operating a second receiver based on the reception of the LP-WUS (S1204). A signal transmission and reception method from a base station perspective according to an embodiment of the present invention may be configured to include a step of determining an overlay sequence for the LP-WUS (S1201), and a step of transmitting the LP-WUS based on the determined overlay sequence (S1202).

[0182] Although not shown, the base station can determine an overlay sequence of an LP-SS in addition to an LP-WUS, and transmit the LP-SS to the first receiver of the terminal based on the determined overlay sequence. The terminal can receive the LP-SS through the first receiver, and receive the LP-WUS based on the LP-SS.

[0183] In addition to the operation of FIG. 7, the operations disclosed in Method #1 to Method #3 may be performed.

[0184] Referring to Method #2B, one overlay sequence may be used per OOK symbol or OFDM symbol of LP-WUS. The overlay sequence is used independently for each symbol. The overlay sequences may or may not include information related to LP-WUS. The information related to LP-WUS may be the same information transmitted through the OOK symbol or OFDM symbol of LP-WUS. For example, the information related to LP-WUS may include the ID of the terminal or the ID of the (sub)group to which the terminal belongs, which is used to operate the second receiver of the terminal. For example, a subgroup of terminals may mean terminals that monitor paging messages at the same paging opportunity, and one or more subgroups may be distinguished based on this standard. However, the present invention is not limited thereto, and the subgroups of terminals may be distinguished based on other standards.

[0185] When overlaid sequences are configured to include information related to LP-WUS, each overlaid sequence can independently correspond to one or more specific bit values ​​for each symbol. For example, if the number of candidates for the overlaid sequence is 2, each candidate corresponds to bit value 0 or 1, and the overlaid sequence used for one symbol can express a 1-bit value. If the number of candidates for the overlaid sequence is 4, each candidate corresponds to bit value 00, 01, 10, 11, and the overlaid sequence used for one symbol can express a 2-bit value. If the number of candidates for the overlaid sequence is 2 to the nth power, the overlaid sequence used for one symbol can express an n-bit value. If the number of candidates for the overlaid sequence is not 2 to the nth power (for example, 2 n -m), the overlay sequence used for one symbol is some of the values ​​that can be represented by n bits (e.g. 2 n It can express values ​​(excluding m values ​​among the dog values). Candidate sequences of the overlaid sequence can be generated based on different root sequence indices, or based on the same root sequence index and different cyclic shift values.

[0186] If the overlaid sequences are configured not to include information related to LP-WUS, each overlaid sequence may be configured as a predetermined single sequence. If the overlaid sequences include information related to LP-WUS and the candidate sequences are generated based on different root sequence indices, the single sequence may be generated based on a specific root sequence index among the different root sequence indices. The specific root sequence index may be, for example, 0. If the overlaid sequences include information related to LP-WUS and the candidate sequences are generated based on the same root sequence index and different cyclic shift values, the single sequence may be generated based on a specific cyclic shift value among the different cyclic shift values. The specific smooth shift value may be, for example, 0.

[0187] Additionally, the DFT of LP-WUS and / or LP-SS can be performed based on Method #1. For example, the length of the overlay sequence can be determined based on the bandwidth and M value of LP-WUS and / or LP-SS.

[0188] Based on Method #2 and Method #2A, the base sequence and sequence hopping, circular shift hopping method can be determined.

[0189] Based on method #3, an operation can be performed when only less information bits than the maximum number of information bits that can be transmitted via LP-WUS and / or LP-SS need to be transmitted.

[0190] Examples of communication systems to which the present invention is applied

[0191] Although not limited thereto, the various descriptions, functions, procedures, proposals, methods and / or operational flowcharts of the present invention disclosed in this document may be applied to various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0192] Hereinafter, more specific examples will be provided with reference to the drawings. In the drawings / descriptions below, the same drawing reference numerals may represent identical or corresponding hardware blocks, software blocks, or functional blocks, unless otherwise described.

[0193] Figure 8 illustrates a communication system (1) applied to the present invention.

[0194] Referring to FIG. 8, a communication system (1) applied to the present invention includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Things) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, and can be implemented in the form of HMD (Head-Mounted Device), HUD (Head-Up Display) installed in a vehicle, television, smartphone, computer, wearable device, home appliance, digital signage, vehicle, robot, etc. Mobile devices can include smartphone, smart pad, wearable device (e.g., smart watch, smart glass), computer (e.g., laptop, etc.), etc. Home appliances can include TV, refrigerator, washing machine, etc. IoT devices can include sensors, smart meters, etc. For example, base stations and networks can also be implemented as wireless devices, and a specific wireless device (200a) can act as a base station / network node to other wireless devices.

[0195] Wireless devices (100a to 100f) can be connected to a network (300) via a base station (200). Artificial Intelligence (AI) technology can be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) via the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, etc. The wireless devices (100a to 100f) can communicate with each other via the base station (200) / network (300), but can also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). In addition, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0196] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base stations (200), and base stations (200) / base stations (200). Here, wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR) such as uplink / downlink communication (150a), sidelink communication (150b) (or D2D communication), and communication between base stations (150c) (e.g., relay, IAB (Integrated Access Backhaul). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes can be performed based on various proposals of the present invention.

[0197] Examples of wireless devices to which the present invention is applied

[0198] Figure 9 illustrates a wireless device applicable to the present invention.

[0199] Referring to FIG. 9, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals via various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} can correspond to {the wireless device (100x), the base station (200)} and / or {the wireless device (100x), the wireless device (100x)} of FIG. 8.

[0200] A first wireless device (100) includes one or more processors (102) and one or more memories (104), and may further include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memories (104) and / or the transceivers (106), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (102) may process information in the memory (104) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (106). In addition, the processor (102) may receive a wireless signal including second information / signal via the transceiver (106), and then store information obtained from signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals via one or more antennas (108). The transceiver (106) may include a transmitter and / or a receiver. The transceiver (106) may be used interchangeably with an RF (Radio Frequency) unit. In the present invention, a wireless device may also mean a communication modem / circuit / chip.

[0201] The second wireless device (200) includes one or more processors (202), one or more memories (204), and may further include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memories (204) and / or the transceivers (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers (206). Furthermore, the processor (202) may receive a wireless signal including fourth information / signals via the transceivers (206), and then store information obtained from signal processing of the fourth information / signals in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may perform some or all of the processes controlled by the processor (202), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via one or more antennas (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF unit. In the present invention, a wireless device may also mean a communication modem / circuit / chip.

[0202] Hereinafter, the hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed herein, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) can receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed herein.

[0203] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software configured to perform one or more processors (102, 202) or stored in one or more memories (104, 204) and executed by one or more processors (102, 202). The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.

[0204] One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories (104, 204) may be configured as ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories (104, 204) may be located internally and / or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0205] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or flowcharts of this document, to one or more other devices. One or more transceivers (106, 206) can receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of this document, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, one or more processors (102, 202) can control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be coupled to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, or the like, as referred to in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein, via one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert received user data, control information, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202).One or more transceivers (106, 206) may convert user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.

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

[0207] Figure 10 illustrates another example of a wireless device applicable to the present invention. The wireless device may be implemented in various forms depending on the use case / service (see Figure 8).

[0208] Referring to FIG. 10, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 9 and may be composed of various elements, components, units / units, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional elements (140). The communication unit may include a communication circuit (112) and a transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 9. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 9. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and the additional elements (140) and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit (130). In addition, the control unit (120) may transmit information stored in the memory unit (130) to an external device (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from an external device (e.g., another communication device) via a wireless / wired interface in the memory unit (130).

[0209] The additional element (140) may be configured in various ways depending on the type of the wireless device. For example, the additional element (140) may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 8, 100a), a vehicle (Fig. 8, 100b-1, 100b-2), an XR device (Fig. 8, 100c), a portable device (Fig. 8, 100d), a home appliance (Fig. 8, 100e), an IoT device (Fig. 8, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or a financial device), a security device, a climate / environmental device, an AI server / device (Fig. 8, 400), a base station (Fig. 8, 200), a network node, etc. Wireless devices may be mobile or stationary depending on the use / service.

[0210] In FIG. 10, various elements, components, units / parts, and / or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least some may be wirelessly connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be wired, and the control unit (120) and a first unit (e.g., 130, 140) may be wirelessly connected via the communication unit (110). In addition, each element, component, unit / part, and / or module within the wireless device (100, 200) may further include one or more elements. For example, the control unit (120) may be composed of one or more processor sets. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0211] Examples of vehicles or autonomous vehicles to which the present invention is applied

[0212] Figure 11 illustrates a vehicle or autonomous vehicle applicable to the present invention. The vehicle or autonomous vehicle may be implemented as a mobile robot, a car, a train, a manned or unmanned aerial vehicle (AV), a ship, or the like.

[0213] Referring to FIG. 11, a vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a driving unit (140a), a power supply unit (140b), a sensor unit (140c), and an autonomous driving unit (140d). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 of FIG. 10, respectively.

[0214] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, road side units, etc.), and servers. The control unit (120) can control elements of the vehicle or autonomous vehicle (100) to perform various operations. The control unit (120) can include an ECU (Electronic Control Unit). The drive unit (140a) can drive the vehicle or autonomous vehicle (100) on the ground. The drive unit (140a) can include an engine, a motor, a power train, wheels, brakes, a steering device, etc. The power supply unit (140b) supplies power to the vehicle or autonomous vehicle (100) and can include a wired / wireless charging circuit, a battery, etc. The sensor unit (140c) can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit (140c) may include an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an incline sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit (140d) may implement a technology for maintaining a driving lane, a technology for automatically controlling speed such as adaptive cruise control, a technology for automatically driving along a set path, a technology for automatically setting a path and driving when a destination is set, etc.

[0215] For example, the communication unit (110) can receive map data, traffic information data, etc. from an external server. The autonomous driving unit (140d) can generate an autonomous driving route and driving plan based on the acquired data. The control unit (120) can control the drive unit (140a) so that the vehicle or autonomous vehicle (100) moves along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit (110) can irregularly / periodically acquire the latest traffic information data from an external server and can acquire surrounding traffic information data from surrounding vehicles. In addition, during autonomous driving, the sensor unit (140c) can acquire vehicle status and surrounding environment information. The autonomous driving unit (140d) can update the autonomous driving route and driving plan based on newly acquired data / information. The communication unit (110) can transmit information regarding the vehicle location, autonomous driving route, driving plan, etc. to the external server. External servers can predict traffic information data in advance using AI technology or other technologies based on information collected from vehicles or autonomous vehicles, and provide the predicted traffic information data to the vehicles or autonomous vehicles.

[0216] It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the scope of the invention. Therefore, the above detailed description should not be construed as limiting in any respect, but rather as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of equivalents of the present invention are intended to be included within the scope of the present invention.

[0217] As described above, the present invention can be applied to various wireless communication systems.

Claims

1. In a method performed by a terminal in a wireless communication system, A step of receiving a LP-WUS (Low Power-Wake Up Signal) through the first receiver of the terminal; and A step of operating a second receiver of the terminal based on reception of the LP-WUS; Overlaid sequences for the above LP-WUS are used, Based on the above overlaid sequences being set to include information associated with the LP-WUS, the above overlaid sequences are each set 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, Based on the fact that the above overlaid sequences are set not to include information associated with the LP-WUS, the above overlaid sequences are each set to a predetermined single sequence, and the single sequence is a predetermined specific sequence among the plurality of candidate sequences. method.

2. In paragraph 1, Information associated with the above LP-WUS includes an ID (identifier) ​​of the terminal or an ID of a group to which the terminal belongs, which is used to operate the second receiver of the terminal. method.

3. In paragraph 1, Based on the above overlay sequences being set to include information associated with the LP-WUS, the candidate sequences are sequences based on different root sequence indices, Based on the above overlay sequences being set not to include information associated with the LP-WUS, the single sequence is a sequence based on a specific root sequence index among the different root sequence indices. method.

4. In paragraph 3, The above specific root sequence index is 0, method.

5. In paragraph 1, Based on the above overlay sequences being set to include information associated with the LP-WUS, the candidate sequences are sequences based on the same root sequence index and the different cyclic shift values, Based on the above overlay sequences being set not to include information associated with the LP-WUS, the single sequence is a sequence based on a specific cyclic shift value among the different cyclic shift values. method.

6. In paragraph 5, The above specific circular shift value is 0, method.

7. In paragraph 1, A step of receiving information from a base station as to whether the above overlay sequences include information associated with the LP-WUS; further comprising; method.

8. In a terminal operating in a wireless communication system, First receiver and second receiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform a specific operation; The above specific actions are: A step of receiving a LP-WUS (Low Power-Wake Up Signal) through the first receiver of the terminal; and A step of operating a second receiver of the terminal based on reception of the LP-WUS; Overlaid sequences for the above LP-WUS are used, Based on the above overlaid sequences being set to include information associated with the LP-WUS, the above overlaid sequences are each set 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, Based on the fact that the above overlaid sequences are set not to include information associated with the LP-WUS, the above overlaid sequences are each set to a predetermined single sequence, and the single sequence is a predetermined specific sequence among the plurality of candidate sequences. Terminal.

9. In paragraph 8, Information associated with the above LP-WUS includes an ID (identifier) ​​of the terminal or an ID of a group to which the terminal belongs, which is used to operate the second receiver of the terminal. Terminal.

10. In paragraph 8, Based on the above overlay sequences being set to include information associated with the LP-WUS, the candidate sequences are sequences based on different root sequence indices, Based on the above overlay sequences being set not to include information associated with the LP-WUS, the single sequence is a sequence based on a specific root sequence index among the different root sequence indices. Terminal.

11. In paragraph 10, The above specific root sequence index is 0, Terminal.

12. In paragraph 8, Based on the above overlay sequences being set to include information associated with the LP-WUS, the candidate sequences are sequences based on the same root sequence index and the different cyclic shift values, Based on the above overlay sequences being set not to include information associated with the LP-WUS, the single sequence is a sequence based on a specific cyclic shift value among the different cyclic shift values. Terminal.

13. In paragraph 12, The above specific circular shift value is 0, Terminal.

14. In paragraph 8, A step of receiving information from a base station as to whether the above overlay sequences include information associated with the LP-WUS; further comprising; Terminal.

15. In a device for a terminal, at least one processor; and At least one computer memory operably connected to said at least one processor and configured to, when executed, cause said at least one processor to perform operations, said operations comprising: A step of receiving a LP-WUS (Low Power-Wake Up Signal) through the first receiver of the terminal; and A step of operating a second receiver of the terminal based on reception of the LP-WUS; Overlaid sequences for the above LP-WUS are used, Based on the above overlaid sequences being set to include information associated with the LP-WUS, the above overlaid sequences are each set 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, Based on the fact that the above overlaid sequences are set not to include information associated with the LP-WUS, the above overlaid sequences are each set to a predetermined single sequence, and the single sequence is a predetermined specific sequence among the plurality of candidate sequences. device.

16. A computer-readable non-volatile storage medium comprising at least one computer program that causes a terminal including at least one processor to perform an operation, the operation comprising: A step of receiving a LP-WUS (Low Power-Wake Up Signal) through the first receiver of the terminal; and A step of operating a second receiver of the terminal based on reception of the LP-WUS; Overlaid sequences for the above LP-WUS are used, Based on the above overlaid sequences being set to include information associated with the LP-WUS, the above overlaid sequences are each set 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, Based on the fact that the above overlaid sequences are set not to include information associated with the LP-WUS, the above overlaid sequences are each set to a predetermined single sequence, and the single sequence is a predetermined specific sequence among the plurality of candidate sequences. Storage media.

17. In a method performed by a base station in a wireless communication system, A step of determining overlay sequences for a LP-WUS (Low Power-Wake Up Signal) for a first receiver of a terminal; A step of transmitting the LP-WUS based on the above overlay sequences; Based on the above overlaid sequences being set to include information associated with the LP-WUS, the above overlaid sequences are each set 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, Based on the fact that the above overlaid sequences are set not to include information associated with the LP-WUS, the above overlaid sequences are each set to a predetermined single sequence, and the single sequence is a predetermined specific sequence among the plurality of candidate sequences. method.

18. In a base station operating in a wireless communication system, At least one transceiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform a specific operation; The above specific actions are: A step of determining overlay sequences for a LP-WUS (Low Power-Wake Up Signal) for a first receiver of a terminal; A step of transmitting the LP-WUS based on the above overlay sequences; Based on the above overlaid sequences being set to include information associated with the LP-WUS, the above overlaid sequences are each set 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, Based on the fact that the above overlaid sequences are set not to include information associated with the LP-WUS, the above overlaid sequences are each set to a predetermined single sequence, and the single sequence is a predetermined specific sequence among the plurality of candidate sequences. Base station.

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