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

Abstract

According to the present invention, an LP-WUS and / or LP-SS received by a terminal of a wireless communication system through a low power receiver may be modulated using OOK. When the LP-WUS and / or LP-SS is generated to include a total of N OOK symbols, the length of M OOK symbols among the N OOK symbols corresponds to one OFDM symbol period. Here, the range or number of values of M that can be set may be determined on the basis of the SCS.

Description

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

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

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

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

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

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

[0006] As one aspect of the present invention, a method performed by a terminal in a wireless communication system is provided, comprising: receiving 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 the LP-WUS is generated to include M1 OOK symbols corresponding to one OFDM symbol interval, and the number of values ​​that can be set to M1 is determined based on an SCS used in the LP-WUS.

[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: generating an LP-WUS (Low Power-Wake Up Signal) for a first receiver of a terminal; and transmitting the LP-WUS to the first receiver; wherein the LP-WUS is generated to include M1 OOK symbols corresponding to one OFDM symbol interval, and the number of values ​​that can be set to M1 is determined based on an SCS used in the LP-WUS.

[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 beginning of each paragraph can indicate vertical / horizontal relationships between descriptions within each paragraph. Specifically, '●', '■', and '◆' can indicate upper categories in that order. For example, '■' listed after '●' can be a supplementary explanation of '●'. '◆' listed after '■' can be a supplementary explanation of '■'.

[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] How to determine the M value set (or settable) in LP-WUS / LP-SS according to the BW (or PRB number) set in LP-WUS / LP-SS

[0074] When LP-WUS / LP-SS is modulated and generated through the OOK-4, the size of the frequency resource through which the LP-WUS / LP-SS is transmitted may differ depending on the M value. The M value means the number of OOK symbols confined or included in one OFDM symbol, or the number of information bits that can be transmitted through one OFDM symbol (when Manchester encoding is not applied). For example, the period of an OOK symbol generated by the OOK-4 method with M=1 (i.e., the duration of an ON or OFF symbol) may be half that of an OOK symbol generated by the OOK-4 method with M=2. The period of an OOK symbol generated by the OOK-4 method with M=4 may be half that of an OOK symbol generated by the OOK-4 method with M=2. In general, since the frequency spectrum doubles when the symbol interval in the time domain is halved, M=2 may require twice as many frequency resources as M=1, and M=4 may require twice as many frequency resources as M=2. When sufficiently small frequency resources are allocated / configured for LP-WUS / LP-SS, the M value of the OOK-4 symbol to be transmitted with the corresponding frequency resources may be limited. The M value may be limited when a configurable BW (PRB) is used depending on the channel conditions or the data to be transmitted, or when a dynamically configurable BW (PRB) is used.

[0075] The method described below can be applied to LP-WUS / LP-SS modulated to OOK-4. LP-WUS / LP-SS modulated to OOK-1 can also be considered as OOK-4 with M=1, and the methods of this specification can be applied equally. The method described herein by exemplifying some M values ​​can be applied equally to any M value (e.g., M=1, 2, 4, 8, ...).

[0076] 1) Transmitter (Entity A):

[0077] ● The base station can apply different ranges of configurable M values ​​depending on the BW (or number of PRBs) set in LP-WUS / LP-SS. For example, if the set BW is greater than a certain value, the range of configurable M values ​​can be (same as or) larger than otherwise. If the set BW is less than a certain value, the range of configurable M values ​​can be (same as or) smaller than otherwise.

[0078] ■ The above specific BW value and / or the range of configurable M values ​​can be set (by SCS) through upper layer parameters such as RRC and SIB, or can be defined in advance or set through a preamble, etc.

[0079] ■ Example: If the base station's LP-WUS BW is 5MHz or more, one of M=1, 2, or 4 can be set. If it is 2.5MHz or more and 5MHz or less, one of M=1 or 2 can be set. If it is 2.5MHz or less, only M=1 can be set.

[0080] ■ Example: If the base station's LP-SS BW is 4MHz or more, it can set one of M=1,2,4,8; if it is 2MHz or more and 4MHz or less, it can set one of M=1,2,4; and if it is 2MHz or less, it can set one of M=1,2.

[0081] ● The base station can set / apply one M value to generate LP-WUS / LP-SS according to the BW (or number of PRBs) set in LP-WUS / LP-SS. For example, if the set BW is greater than a certain value, the set M value can be (equal to) a larger value than otherwise. If the set BW is less than a certain value, the set M value can be (equal to) a smaller value than otherwise.

[0082] ■ The above specific BW value and / or configurable / applicable M value may be set (by SCS) through upper layer parameters such as RRC and SIB, or may be defined in advance or set through a preamble, etc.

[0083] ■ Example: The base station can set / apply M=4 when the LP-WUS BW is 5MHz or more, set / apply M=2 when it is 2.5MHz or more and 5MHz or less, and set / apply M=1 when it is 2.5MHz or less.

[0084] ■ Example: If the LP-SS BW is 4MHz or more, the base station can set / apply one of M=4,8, if it is 2MHz or more and 4MHz or less, it can set / apply M=2, and if it is 2MHz or less, it can set / apply M=1.

[0085] 2) Receiving end (Receiver, Entity B):

[0086] ● 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.

[0087] ● 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.

[0088] [Method #2] How to determine the BW (or PRB number) set (or settable) in LP-WUS / LP-SS according to the M value set in LP-WUS / LP-SS

[0089] When LP-WUS / LP-SS is modulated and generated through the OOK-4, the size of the frequency resource transmitted by the LP-WUS / LP-SS may differ depending on the M value. For example, the period of an OOK symbol generated by the OOK-4 method with M=1 (i.e., the duration of an ON or OFF symbol) may be half that of an OOK symbol generated by the OOK-4 method with M=2. The period of an OOK symbol generated by the OOK-4 method with M=4 may be half that of an OOK symbol generated by the OOK-4 method with M=2. In general, when the symbol period in the time domain is halved, the frequency spectrum doubles, so M=2 may require twice as many frequency resources as M=1, and M=4 may require twice as many frequency resources as M=2. When a sufficiently small frequency resource is allocated / configured for the LP-WUS / LP-SS, the M value of the OOK-4 symbol to be transmitted with the corresponding frequency resource may be limited. The M value may be limited when a configurable BW (PRB) is used depending on the channel conditions or the data to be transmitted, or when a dynamically configurable BW (PRB) is used.

[0090] The method described below can be applied to LP-WUS / LP-SS modulated to OOK-4. LP-WUS / LP-SS modulated to OOK-1 can also be considered as OOK-4 with M=1, and the methods of this specification can be applied equally. The method described herein by exemplifying some M values ​​can be applied equally to any M value (e.g., M=1, 2, 4, 8, ...).

[0091] 1) Transmitter (Entity A):

[0092] ● The base station can apply different ranges of configurable BW (or PRB number) values ​​depending on the M value set in LP-WUS / LP-SS. For example, if the set M value is greater than a certain value, the range of configurable BW (or PRB number) values ​​can be (same as or) larger than otherwise. If the set M value is less than a certain value, the range of configurable BW (or PRB number) can be (same as or) smaller than otherwise.

[0093] ■ The above specific M value and / or the range of configurable BW (or PRB number) can be set through upper layer parameters such as RRC and SIB (by SCS), or can be defined in advance, or can be set through a preamble, etc.

[0094] ■ Example: If the M value set in LP-WUS is 4, the base station can set the BW to 5 MHz or more, if the M value is 2, the BW can be set to a range of 2.5 MHz or more and 5 MHz or less, and if M=1, the BW can be set to 2.5 MHz or less.

[0095] ■ Example: If the M value set in LP-SS is 8, the base station can set the BW to 5MHz or more, if the M value is 4, the BW can be set to a range of 2.5MHz or more and 5MHz or less, and if M=1 or 2, the BW can be set to 2.5MHz or less.

[0096] ● The base station can set / apply the LP-WUS / LP-SS transmission BW as one according to the M value set in the LP-WUS / LP-SS. For example, if the set M value is greater than a certain value, the set BW (or PRB number) can be (same as or) a larger value than otherwise. If the set M value is less than a certain value, the set BW (or PRB number) can be (same as or) a smaller value than otherwise.

[0097] ■ The above specific M value and / or BW (or PRB number) to be set / applied may be set (by SCS) through upper layer parameters such as RRC and SIB, or may be defined in advance or may be set through a preamble, etc.

[0098] ■ Example: The base station can set / apply a BW of 5MHz when the M value set in LP-WUS is M=4, set / apply a BW having a value of 2.5MHz or more and 5MHz or less when M=2, and set / apply a BW of 2.5MHz or less when M=1.

[0099] ■ Example: The base station can set / apply a BW of 5MHz when the M value set in LP-SS is M=8, set / apply a BW having a value of 2.5MHz or more and 5MHz or less when M=2, and set / apply a BW of 2.5MHz or less when M=1 or 2.

[0100] 2) Receiving end (Receiver, Entity B):

[0101] ● 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.

[0102] ● 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.

[0103] [Method #3] How to change the settings of LP-WUS / LP-SS transmitted in the same BW (or PRB number) according to the M value set in LP-WUS / LP-SS

[0104] When LP-WUS / LP-SS is modulated and generated through the above OOK-4, LP-WUS / LP-SS can be transmitted through the same BW regardless of the M value. In this case, if the minimum BW (or number of PRBs) required is different depending on the M value, the setting of LP-WUS / LP-SS transmitted in the same BW can be changed depending on the set M value. This case may be when a single BW (PRB) is defined for each channel BW or when a BW (PRB) that can be set semi-statically is used.

[0105] The method described below can be applied to LP-WUS / LP-SS modulated to OOK-4, but LP-WUS / LP-SS modulated to OOK-1 can also be considered as OOK-4 with M=1, and thus the methods of this specification can be applied equally. The method described by exemplifying some M values ​​in this specification can be applied equally to any M value (e.g., M=1,2,4,8,...).

[0106] 1) Transmitter (Entity A):

[0107] ● When the base station determines / sets either OOK-1 or OOK-4 (and multiple M values ​​in case of OOK-4) for transmission of LP-WUS / LP-SS, the base station determines / sets the BW (or number of PRBs) required for the LP-WUS / LP-SS transmission to the BW required for OOK-1 transmission or OOK-4 transmission with M=1, and can also set / apply the same BW to transmission using OOK-4 and M>1. LP-WUS / LP-SS can be transmitted through one or a combination of the following methods. Which method will be used can be defined in advance or set / indicated through upper layer parameters such as RRC and SIB.

[0108] ● Method 1: The base station can set / apply a different number of samples mapped per LP-WUS information bit in the pre-DFT domain of OOK-4 depending on the set M value.

[0109] ■ For example, when M bits are transmitted via LP-WUS / LP-SS, if the number of valid samples of the OFDM symbol corresponding to the M bits in the pre-DFT domain is N, the base station can generate the LP-WUS / LP-SS using a sequence corresponding to the length of N / (M*K) per each information bit in the pre-DFT domain. Alternatively, an overlaid OFDM sequence corresponding to the length of N / (M*K) per each information bit can be mapped. In this case, the value of K and / or the value of N can be determined in advance (regardless of the value of M) or set through upper layer parameters such as RRB and SIB, and the value of K can be an integer greater than or equal to 1.

[0110] ■ For example, when M bits are transmitted via LP-WUS / LP-SS, if the number of valid samples of an OFDM symbol corresponding to 1 bit in the pre-DFT domain is N, M*N samples are used for the M bits, and the DFT size can also increase in proportion to M. At this time, the length of the sequence corresponding to each information bit in the pre-DFT domain (or the length of the overlaid OFDM sequence) can be the same (as N) regardless of M. At this time, the value of N can be determined in advance or set through upper layer parameters such as RRB and SIB.

[0111] ● Method 2:

[0112] ■ The base station can set X_1 as the transmission BW (or PRB number) of LP-WUS / LP-SS when M=M_1, set X_2 when M=M_2, ..., set X_k when M=M_k, and set X_(k+1) when M=M_(k+1).

[0113] ◆ The mapping between the above M_1, M_2, ..., and X_1, X_2, ..., and M_k and X_k can be determined in advance or set through upper layer parameters such as RRB and SIB.

[0114] ■ At this time, if we assume the relationship that X_1 >= X_2 >= ... >= X_k >= X_(k+1) for M_1 >= M_2 ... >= M_k >= M_(k+1), then LP-WUS / LP-SS set to M_(k+1) has a minimum BW required for transmission of X_(k+1), so it can utilize BW of X_k - X_(k+1) or X_1 - X_(k+1) using one of the methods below (or a combination of two or more).

[0115] ◆ Method 2-1: The base station can transmit the same LP-WUS / LP-SS signal by frequency hopping depending on the M value. For example, if the minimum BW required for M=1 is 5MHz and the minimum BW required for M=2 is 2.5MHz, the LP-WUS / LP-SS transmission BW is set to 5MHz (regardless of M). When M=1, the LP-WUS / LP-SS can be transmitted through the 5MHz BW, and when M=2, the LP-WUS / LP-SS can be transmitted by frequency hopping through one of two consecutive 2.5MHz. This can achieve frequency diversity or transmit additional bits.

[0116] ◆ Method 2-2: The base station can repeatedly transmit the same LP-WUS / LP-SS signal through different frequency resources according to the M value (i.e., repetition in frequency). For example, if the minimum BW required for M=1 is 5MHz and the minimum BW required for M=2 is 2.5MHz, the LP-WUS / LP-SS transmission BW is set to 5MHz (regardless of M). When M=1, LP-WUS / LP-SS can be transmitted through 5MHz BW, and when M=2, the same LP-WUS / LP-SS signal can be transmitted simultaneously on two consecutive 2.5MHz. This allows for frequency diversity.

[0117] ◆ Method 2-3: The base station can transmit some of the information bits transmitted through the LP-WUS / LP-SS signal through different frequency resources depending on the M value (i.e., FD multiplexing). For example, assuming that 8 bits are transmitted through LP-WUS / LP-SS, if the minimum BW required for M=1 is 5 MHz and the minimum BW required for M=2 is 2.5 MHz, the LP-WUS / LP-SS transmission BW is set to 5 MHz (regardless of M). When M=1, all 8 bits can be transmitted through the 5 MHz BW, and when M=2, 4 bits can be transmitted simultaneously over two consecutive 2.5 MHz bits each. This can reduce the number of transmitted OFDM (or OOK) symbols of LP-WUS / LP-SS.

[0118] ◆ Method 2-4: The base station can set the same BW regardless of M even if the minimum required BW for transmitting LP-WUS / LP-SS signals is different depending on the M value, and can transmit LP-WUS / LP-SS through a specific area of ​​the BW (e.g., middle RB / RE) and use the remaining areas (e.g., both end RB / RE) as guard RBs (or guard Bands). For example, when the minimum number of PRBs required for M=1 is 4 {PRB#0,#1,#2,#3} and the minimum number of PRBs required for M=2 is 2, when M=1, LP-WUS / LP-SS can be transmitted through {PRB#0,#1,#2,#3}, and when M=2, LP-WUS / LP-SS can be transmitted through {PRB#1,#2} and PRB#0 and PRB#3 can be set as guard RBs.

[0119] ■ 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.

[0120] 2) Receiving end (Receiver, Entity B):

[0121] ● 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.

[0122] ● 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.

[0123] [Method #4] How to determine the SCS that generates LP-WUS / LP-SS

[0124] LP-WUS / LP-SS can be generated through a CP-OFDM (or DFT-s-OFDM) transmitter of conventional NR. LP-WUS / LP-SS can be generated using the OOK-1 or OOK-4 method. At this time, an SCS for OFDM generation must be determined. The base station can generate an LP-WUS / LP-SS signal using this SCS. The terminal can receive or assume this SCS and, based on this, know the frequency resource location and size of the LP-WUS / LP-SS signal, and can perform energy detection of an OOK symbol and / or sequence detection of an overlaid OFDM symbol.

[0125] If the SCS set for SSB of the cell where LP-WUS is transmitted is different from the SCS set for LP-WUS / LP-SS, the base station may have to generate and transmit SSB and LP-WUS / LP-SS signals while switching between different SCSs. The terminal may have to receive SSB and LP-WUS / LP-SS signals while switching between different SCSs. In particular, in the case of OFDM-based LP-WUR (LP-WUR with both I / Q channels, or LP-WUR capable of receiving / detection / decoding overlaid OFDM sequences in addition to energy detection), time / frequency synchronization or RRM measurement can be performed through SSB signal (instead of LP-SS signal). Such LP-WUR may have to operate by switching between the two SCSs if the SCSs of SSB and LP-WUS are different. This operation may increase the power consumption or complexity of the base station and / or terminal. Below we propose a way to avoid this.

[0126] We will denote the SCS configured in SSB as SCS_SSB, and the SCS configured in LP-WUS / LP-SS as SCS_LP. SCS_LP can be configured by the base station (e.g., via upper layer parameters such as RRC or SIB, dedicated to the terminal or commonly configured for multiple terminals).

[0127] The base station can generate LP-WUS / LP-SS signals based on one of the configured SCS_SSB and SCS_LP (e.g., a larger or smaller value). For example, the terminal can receive LP-WUS / LP-SS signals using the smaller value of the configured SCS_SSB and SCS_LP. This method can be particularly useful in RRC idle / inactive modes.

[0128] The base station can generate an LP-WUS / LP-SS signal using one of SCS_CORESET and SCS_LP set in CORESET (e.g., a large value or a small value). For example, the terminal can receive the LP-WUS / LP-SS signal using the smaller value between the set SCS_CORESET and SCS_LP. At this time, SCS_CORESET may mean the SCS of CORESET#0 for the terminal in idle / inactive mode, or may mean the SCS of the CORESET associated with the PDCCH and / or the SS (search space) set for which PDCCH monitoring is triggered via LP-WUS for the terminal in RRC connected mode.

[0129] The base station can generate an LP-WUS / LP-SS signal with one of SCS_BWP and SCS_LP (e.g., a large value or a small value) set to a specific BWP. For example, the terminal can receive an LP-WUS / LP-SS signal using a smaller value between the set SCS_BWP and SCS_LP. At this time, SCS_BWP can be determined according to the RRC mode or can be set according to a separate setting. For example, SCS_BWP can mean the SCS set to the initial DL BWP in idle mode / inactive mode, or the SCS set to the active DL BWP of the MR in connected mode (before the MR goes to sleep state or after waking up upon receiving a wake-up indication).

[0130] If the SCS set in LP-WUS and LP-SS are different (i.e., SCS_LPWUS and SCS_LPSS have different values), the base station / terminal can generate the LP-WUS / LP-SS signal based on one of the SCS set in LP-WUS and LP-SS (e.g., a larger value or a smaller value).

[0131] Alternatively, an LP-WUS / LP-SS signal can be generated with the minimum or maximum value among two or more values ​​of SCS_SSB, SCS_CORESET, SCS_BWP, SCS_LP, SCS_LPWUS, and SCS_LPSS.

[0132] [Method #5] How to set BW for LP-WUS / LP-SS by SCS

[0133] The BW of LP-WUS / LP-SS can be set / determined differently for each SCS.

[0134] The BW (or number of PRBs) of LP-WUS / LP-SS for a specific SCS can be set / determined based on the BW (or number of PRBs) of other specific SCSs. For example, when the BW for SCS#1 is referred to as the ref. BW, the BW of SCS#2 can be determined by scaling the ref. BW. For example, when the BW of LP-WUS / LPSS for a 30kHz SCS is referred to as 11 PRBs, the BW of a 15kHz SCS can be set / determined as 11*K PRBs. K can mean a separately set or defined integer value or a rational number such as 0.5.

[0135] ● As an example of this, when the BW (or number of PRBs) for 120 kHz is 11 PRBs, the BW for other SCSs can be determined as follows (for example).

[0136] ■ The number of PRBs for 60 / 120 / 240 / 480 / 960kHz is set to a multiple of 11 PRBs.

[0137] ◆ Different PRB numbers can be set for each SCS for 60~960kHz. For example, 11 PRBs can be set for 60kHz, 22 PRBs for 120kHz, and 44 PRBs for 480kHz.

[0138] ◆ Alternatively, different PRB numbers and the same BW can be set for each SCS. For example, 11 PRBs can be set for 960kHz, 11*0.5 PRBs for 480kHz, and 11*0.25 PRBs for 240kHz. The BW / PRB number can be set for all SCSs, such that the PRB number for 120kHz is half of the PRB number for 240kHz.

[0139] ◆ Different PRB numbers can be set for each SCS for 60~960kHz. For example, 11 PRBs can be set for 60kHz, 22 PRBs for 120kHz, and 44 PRBs for 480kHz.

[0140] ◆ A single PRB number can be set for each SCS for 60~960kHz. For example, 11 PRBs can be set equally for all 60~960kHz.

[0141] ◆ The above method can also be applied to 15kHz and / or 30kHz SCS.

[0142] ■ 22 / 11 / 6 / 3 / 2 PRB in order of 60 / 120 / 240 / 480 / 960kHz

[0143] ◆ When the BW of 15kHz and 30kHz is set to 22 and 11 PRB, respectively, how to determine the BW in the FR2 band based on this

[0144] ■ 24 / 12 / 6 / 3 / 2 PRB in order of 60 / 120 / 240 / 480 / 960kHz

[0145] ◆ Even though the BW of 15kHz and 30kHz are set to 22 and 11 PRB, respectively, in the FR2 band, the BW for each SCS is determined based on 12 PRB for the convenience of scaling the BW for each SCS.

[0146] ■ 32 / 16 / 8 / 4 / 2 PRB in order of 60 / 120 / 240 / 480 / 960kHz

[0147] ◆ How to set BW to scalable considering wide frequency of FR2 band

[0148] ■ 16 / 8 / 4 / 2 / 1 PRB in order of 60 / 120 / 240 / 480 / 960kHz

[0149] ◆ Considering the wide frequency of the FR2 band, a method to set the BW to be scalable so that the largest SCS of NR can have 1 PRB

[0150] ■ How to set 11 PRB or 12 PRB for all 60 / 120 / 240 / 480 / 960kHz

[0151] ◆ A method in which one PRB (same as PSS or SSS) is set in common to SCS in the FR2 band

[0152] ■ A method in which the PSS of the SSB set in the cell where LP-WUS / LP-SS is transmitted is set to the same BW (or same PRB) as the SSS or the minimum PRB that is not less than the number of REs of the PSS / SSS.

[0153] ◆ For example, 11 PRBs can be set for 60 / 120 / 240 / 480 / 960kHz.

[0154] ■ How to set one BW each for FR2-1 and FR2-2

[0155] ◆ When the cell where LP-WUS / LP-SS is transmitted is set to one of FR1, FR2-1, and FR2-2, the BW of LP-WUS / LP-SS can be set to one BW (or one PRB) value for all SCSs that can be set in the corresponding FR.

[0156] ■ How to set the BW / PRB number for each SCS so that the LP-WUS / LP-SS signal is less than 5 MHz

[0157] ◆ For example, for 15,30,60,120,240,480,960 kHz SCS, the PRBs can be set in order: 22, 11, 5, 3, 1, 0.5, 0.3.

[0158] ■ How to set the BW / PRB number for each SCS so that the LP-WUS / LP-SS signal has a BW similar to 5MHz

[0159] ◆ For example, for 15,30,60,120,240,480,960 kHz SCS, PRBs 22, 11, 6, 4, 2, 1, 1 can be set in order.

[0160] ■ The BW for SCS of FR1 is set to 5MHz or less, and the BW for SCS of FR2 is set to 20MHz or less.

[0161] ◆ For example, the BW for 15kHz, 30kHz of FR1 is set to 15kHz BW=22 PRB, 30kHz BW=11 PRB so that it is within 5MHz. The BW for 60 / 120 / 240 / 480 / 960kHz of FR2 can be set to 22 / 11 / 6 / 3 / 1 PRB (in that order) so that it is within 20MHz. Or, 24 / 12 / 6 / 3 / 1 PRB can be set (in that order) for each SCS (to make 120kHz 12 PRB).

[0162] ◆ This method can be understood as a method in which the BW of PRB units is set as large as possible within a range not exceeding 5 MHz or 20 MHz.

[0163] ● For the BW proposal methods for each SCS above, the BW for both 480 kHz and 960 kHz can be 1 PRB.

[0164] ■ In this case, the overlaid OFDM sequence that can transmit information together with LP-WUS / LP-SS must be defined within 1 PRB. Therefore, it may be difficult to transmit information exceeding 1 bit through the overlaid OFDM sequence. In this case, a method of transmitting information through the presence or absence of an overlaid sequence can be applied. Considering this purpose, 1 PRB may be sufficient for 480 / 960 kHz SCS.

[0165] If the LP-WUS / LP-SS BW for a specific SCS is smaller than the BW for another specific SCS (e.g., multiple / divisor relationship), the LP-WUS / LP-SS with the smaller BW can be positioned separately within the larger BW. Alternatively, the frequency positions at which the LP-WUS / LP-SS with the smaller BW is transmitted within the larger BW can hop at specific time units (or cell-specifically). For example, if the LP-WUS at 120 kHz is configured with 12 PRBs and the LP-WUS at 960 kHz is configured with 1 PRB, the 960 kHz LP-WUS can be transmitted through 1 PRB at different positions for every different LP-WUS transmission (or every LO) within the 12 PRBs configured at 120 kHz. As another example, if LP-WUS of 120 kHz is set to 12 PRB and LP-WUS of 480 kHz is set to 3 PRB, LP-SS for 4 cells can be transmitted through 3 non-overlapping PRBs within the 12 PRBs for 4 different cells.

[0166] Additionally, for LP-WUS / LP-SS generated with OOK-4, if the LP-WUS / LP-SS transmission is smaller than the BW set for it (e.g., the BW is set to 12 PRB, but the LP-WUS / LP-SS is transmitted with 6 PRB), the LP-WUS and LP-SS can be FDMed and transmitted simultaneously within the set BW (e.g., can be generated / transmitted via the same CP-OFDM).

[0167] [Method #6] How to set up SCS for LP-WUS / LP-SS

[0168] In the case where the SCS for generating LP-WUS / LP-SS is configured by the base station (e.g., via RRC or SIB), a default SCS that can be assumed in the absence of such configuration (or before it is configured) can be separately configured / defined. In the absence of such separate configuration for the SCS, the base station and terminal can determine that the LP-WUS / LP-SS is generated / transmitted using the default SCS.

[0169] The above basic SCS may be the SCS of the SSB of the cell (the cell being transmitted) in which LP-WUS / LP-SS is set. Alternatively, the above basic SCS may be the SCS of the initial DL BWP or the basic DL BWP of the cell / terminal.

[0170] Alternatively, the above basic SCS may be an SCS set in a DL BWP associated with an LP-WUS / LP-SS.

[0171] Even if an SCS for generating LP-WUS / LP-SS is configured by the base station, if LP-WUS / LP-SS monitoring is performed via LP-WUR when the MR is not in sleep state (e.g., when the MR wakes up after receiving LP-WUS) (e.g., when both MR and LP-WUR are active), the SCS for generating LP-WUS / LP-SS can be the SCS configured in the active DL BWP of the MR. Alternatively, the SCS for generating LP-WUS / LP-SS can follow the SCS of CORESET#0 of the MR (for Idle / Inactive state) or the SCS of the CORESET for the PDCCH on which PDCCH monitoring is triggered via LP-WUR (for Connected state).

[0172] [Method #7] Setting the M value of LP-WUS / LP-SS for high SCS

[0173] The SCS of FR2 (especially FR2-2) is a larger value than the SCS of FR1, and the larger the SCS, the smaller the duration of the OFDM symbol. When LP-WUS / LP-SS is generated as OOK-4, the larger the M value (which means the number of OOK symbols in the OFDM symbol), the smaller the duration of the OOK symbol. For example, the OOK symbol duration of OOK-4 is M times smaller than the OFDM symbol duration. Since LP-WUR is a low-power, low-complexity receiver, there may be limitations in energy detection and / or sequence decoding for a very short duration. To avoid this, for a specific SCS of FR2, only a part of the M value can be used or set. For example, even if LP-WUS is set to use one of M=1,2,4, if LP-WUS SCS is set to 960kHz, LP-WUS can be generated with M=1 (regardless of the separately set M). Alternatively, if the SCS of LP-WUS / LP-SS is set, the M value can be determined automatically accordingly. For example, one of M=1,2,4 can be used for 15 / 30kHz, while M=2 can be used for 60 / 120kHz, and M=1 can be used for 240 / 480 / 960kHz.

[0174] Additionally, the number of information bits that can be transmitted via an overlaid OFDM sequence may be limited for each SCS. Or, if X bits are set to be transmitted via the overlaid sequence(s) for a specific SCS (and a specific M value) (for example, if one of four sequences is set to be selected and transmitted via an OOK symbol, this can be regarded as a case where 2 bits are set to be transmitted via one overlaid sequence), then for another specific SCS (and a specific M value), X*Y bits may be set / determined to be transmitted via the overlaid sequence(s) (or one of 2^(X*Y) overlaid sequences may be selected / transmitted). Depending on the relationship between the specific SCS and another specific SCS, Y may be a value greater than or less than 1.

[0175] For example, 1 bit can be transmitted (select / transmit one of the 2 sequences) via overlay sequence(s) for LP-WUS / LP-SS generated with SCS of 15k / 30kHz, 2 bits can be transmitted via overlay sequence(s) for LP-WUS / LP-SS generated with SCS of 60 / 120kHz, and 4 bits can be transmitted via overlay sequence(s) for LP-WUS / LP-SS generated with SCS of 480 / 960kHz. As the BW of LP-WUS / LP-SS increases at a higher SCS, the power consumption of LP-WUR when receiving a signal can increase. As more bits are transmitted via overlay sequence(s) at a higher SCS, the time to monitor LP-WUS can be reduced, which can reduce the power consumption.

[0176] Alternatively, conversely, 4 bits could be transmitted (selecting / transmitting one of 16 sequences) via overlaid sequence(s) for LP-WUS / LP-SS generated with SCS of 15k / 30kHz, 2 bits could be transmitted via overlaid sequence(s) for LP-WUS / LP-SS generated with SCS of 60 / 120kHz, and 1 bit could be transmitted via overlaid sequence(s) for LP-WUS / LP-SS generated with SCS of 480 / 960kHz. Since the interval of OOK symbols constituting LP-WUS / LP-SS becomes shorter as SCS increases, reducing the number of sequences overlaying each OOK symbol can help reduce the complexity of LP-WUR.

[0177] Additionally, for high SCS, M can be set or interpreted as 0.5, 0.25. For example, after M=2 is set for LP-WUS / LP-SS with 15kHz SCS, and then the SCS of LP-WUS / LP-SS is set to 480kHz, 15kHz M=2 can be interpreted as 480kHz M=0.5. M=0.5 can mean how two OFDM symbols make one OOK symbol. That is, (assuming there is no Manchester coding) two OFDM symbols become OOK symbols with the same state (either ON or OFF), and one bit can be indicated through these two OFDM symbols (if Manchester coding is applied, it can be 4 OFDM symbols). Or M=0.25 can mean how 4 OFDM symbols make one OOK symbol.

[0178] Alternatively, M=0.5 could be a way to generate the LP-WUS / LP-SS signal by doubling the SCS set in LP-WUS / LP-SS. 0.25 could mean 4x.

[0179] Alternatively, M=0.5 could mean that the OOK symbol with M=1 is repeatedly transmitted for two OFDM symbols. In this case, 0.25 could mean repetition for four OFDM symbols.

[0180] In FR2-2, the terminal can be configured with one of 120kHz, 480kHz, and 960kHz SCS, and the timelines of 480kHz and 960kHz (e.g., setting values ​​of TDRA, K0, k1, etc.) are determined to be 4 and 8 times larger than the timeline of 120kHz, respectively. This allows the terminal to reduce the receiving processing burden caused by the shortened slot / symbol length. For a similar purpose, if M=4 is set for an OOK-4 based LP-WUS / LP-SS generated at 120kHz, M=1 can be set for an OOK-4 based LP-WUS / LP-SS generated at 480kHz. Additionally, for OOK-4 based LP-WUS / LP-SS generated at 960kHz, 120kHz (when OOK-4 generated at 120kHz is set to M=4 or OOK-4 generated at 480kHz is set to M=1), one of the following actions may be performed (or set or generated):

[0181] ● OOK-4 with M=1

[0182] ● OOK-4 with M=0.5 (One 480kHz OOK-4 (M=1) signal corresponding to the length of two 960kHz OFDM symbols can be used, or two 960kHz OOK-4 (M=1) signals can be transmitted repeatedly)

[0183] ● At 960kHz, LP-WUS / LP-SS can always be generated as OOK-1.

[0184] ● LP-WUS / LP-SS may not be supported at 960kHz

[0185] 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.

[0186] A-IoT (Ambient Internet of Things)

[0187] 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.

[0188] 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.

[0189] 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).

[0190] 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.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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).

[0196] Implementation example

[0197] Figure 6 is a flowchart of a signal transmission and reception method according to embodiments of the present invention.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] However, in the case of an A-IoT device, only the first receiver among the first and second receivers may be included.

[0203] In addition to the basic operation of FIG. 6, other operations disclosed in this specification may be combined.

[0204] Figure 7 is a flowchart that further concretizes a signal transmission and reception method according to an embodiment of the present invention.

[0205] 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 generating an LP-WUS (S1201), and a step of transmitting the generated LP-WUS (S1202).

[0206] Although not shown, the base station can determine the resources of the LP-SS in addition to the LP-WUS, and transmit the LP-SS to the first receiver of the terminal based on the determined resources. The terminal can receive the LP-SS through the first receiver, and receive the LP-WUS based on the LP-SS.

[0207] In addition to the operation of FIG. 7, the operations disclosed in Method #1 to Method #7 may be performed.

[0208] Additionally, referring to FIG. 4, LP-WUS / LP-SS is generated to include M OOK symbols corresponding to one OFDM symbol interval. The M value for LP-WUS may be referred to as M1, and the M value for LP-SS may be referred to as M2.

[0209] M may refer to the number of bits that can be transmitted per OFDM symbol period in LP-WUS / LP-SS in addition to the OOK symbol period included in one OFDM symbol period. Or, when line coding or Manchester coding is configured, M may correspond to twice the number of bits that can be transmitted per OFDM symbol period in LP-WUS / LP-SS. Or, when channel coding or Reed Muller coding is configured, M may correspond to one R times the number of bits that can be transmitted per OFDM symbol period in LP-WUS / LP-SS. R refers to the code rate of the channel coding.

[0210] Referring to Method #7, the number of values ​​that can be set to M can be determined based on the SCS used in LP-WUS / LP-SS. If the SCS used in LP-WUS and the SCS used in LP-SS are the same, M1 and M2 are the same. If the SCS used in LP-WUS and the SCS used in LP-SS are different, M1 and M2 may be different.

[0211] Specifically, the range of M values ​​that can be set by the terminal can be preset by the base station through RRC, SIB, etc. Even if the values ​​that can be set as M are preset by the base station to the terminal, if the SCS used in LP-WUS / LP-SS exceeds the threshold, the values ​​that can be set as M can be limited to some of the preset values.

[0212] The number of M values ​​corresponding to each SCS and the specific M values ​​can be referred to Method #7.

[0213] Referring to Method #1, the number of values ​​that can be set to M can be determined based on the bandwidth of LP-WUS / LP-SS.

[0214] Similar to SCS, even if the values ​​that can be set to M are preset to the terminal by the base station, if the bandwidth of LP-WUS / LP-SS is below the threshold, the values ​​that can be set to M may be limited to some of the preset values.

[0215] In addition, the bandwidth of LP-WUS / LP-SS can be determined according to the M value based on Method #2. In addition, frequency hopping and / or repeated transmission can be performed according to the M value based on Method #3. In addition, the SCS of LP-WUS / LP-SS can be determined based on Method #4. In addition, the BW of LP-WUS / LP-SS can be determined according to the SCS based on Method #5. In addition, the default SCS can be set based on Method #6.

[0216] Examples of communication systems to which the present invention is applied

[0217] 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.

[0218] 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.

[0219] Figure 8 illustrates a communication system (1) applied to the present invention.

[0220] 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.

[0221] 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).

[0222] 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.

[0223] Examples of wireless devices to which the present invention is applied

[0224] Figure 9 illustrates a wireless device applicable to the present invention.

[0225] 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.

[0226] 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.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] 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.

[0231] 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.

[0232] Examples of wireless devices to which the present invention is applied

[0233] 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).

[0234] 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).

[0235] 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.

[0236] 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.

[0237] Examples of vehicles or autonomous vehicles to which the present invention is applied

[0238] 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.

[0239] 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.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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; The above LP-WUS is generated to include M1 OOK symbols corresponding to one OFDM symbol interval, The number of values ​​that can be set to the above M1 is determined based on the SCS used in the above LP-WUS. method.

2. In paragraph 1, A step of receiving a LP-SS (Low Power-Synchronization Signal) through the first receiver of the terminal; and A step of performing synchronization of the LP-WUS based on the LP-SS; further comprising: The OOK symbols to which the above LP-SS is assigned are configured to include M2 ​​OOK symbols per OFDM symbol, The number of values ​​that can be set to the above M2 is determined based on the SCS used in the above LP-SS. method.

3. In paragraph 1, Even if the values ​​that can be set to the above M1 are preset to the terminal by the base station, based on the SCS used in the LP-WUS exceeding the threshold, the values ​​that can be set to the above M1 are limited to some of the values ​​that can be set to the above M1. method.

4. In paragraph 1, Based on the SCS used in the above LP-WUS being below the threshold value, the values ​​that can be set to the above M1 include 1, 2, and 4. Based on the SCS used in the above LP-WUS exceeding the threshold value, the values ​​that can be set to the above M1 include one or two of 1, 2, and 4. method.

5. In paragraph 1, Based on the SCS used in the above LP-WUS exceeding 30 kHz, the values ​​that can be set to the above M1 include one of 1, 2, and 4. method.

6. In paragraph 1, Based on the SCS used in the above LP-WUS being 60 kHz or 120 kHz, the values ​​that can be set to M1 include only 2 of 1, 2, and 4. method.

7. In paragraph 1, Based on the SCS used in the above LP-WUS being 240 kHz, 480 kHz, or 960 kHz, the values ​​that can be set to M1 include only 1 of 1, 2, and 4. method.

8. In paragraph 1, The number of values ​​that can be set to the above M1 is determined based on the SCS used in the above LP-WUS and the bandwidth of the above LP-WUS. method.

9. In paragraph 8, Even if the values ​​that can be set to the above M1 are preset to the terminal by the base station, based on the bandwidth of the LP-WUS being below a threshold, the values ​​that can be set to the above M1 are limited to some of the values ​​that can be set to the above M1. method.

10. 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; The above LP-WUS is generated to include M1 OOK symbols corresponding to one OFDM symbol interval, The number of values ​​that can be set to the above M1 is determined based on the SCS used in the above LP-WUS. Terminal.

11. 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; The above LP-WUS is generated to include M1 OOK symbols corresponding to one OFDM symbol interval, The number of values ​​that can be set to the above M1 is determined based on the SCS used in the above LP-WUS. device.

12. 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; The above LP-WUS is generated to include M1 OOK symbols corresponding to one OFDM symbol interval, The number of values ​​that can be set to the above M1 is determined based on the SCS used in the above LP-WUS. Storage media.

13. In a method performed by a base station in a wireless communication system, A step of generating a LP-WUS (Low Power-Wake Up Signal) for the first receiver of the terminal; and A step of transmitting the LP-WUS to the first receiver; The above LP-WUS is generated to include M1 OOK symbols corresponding to one OFDM symbol interval, The number of values ​​that can be set to the above M1 is determined based on the SCS used in the above LP-WUS. method.

14. 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 generating a LP-WUS (Low Power-Wake Up Signal) for the first receiver of the terminal; and A step of transmitting the LP-WUS to the first receiver; The above LP-WUS is generated to include M1 OOK symbols corresponding to one OFDM symbol interval, The number of values ​​that can be set to the above M1 is determined based on the SCS used in the above LP-WUS. Base station.

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