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

Abstract

When LP-WUS and LP-SS are transmitted and received between a base station and a terminal of a wireless communication system, frequency and time resources of the LP-WUS and the LP-SS can be configured on the basis of the methods disclosed in the present specification.

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-SS is composed of 11 RBs (resource blocks).

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

[0008] In another aspect of the present invention, a method performed by a base station in a wireless communication system is provided, comprising: a step of setting a resource of an LP-WUS (Low Power-Wake Up Signal) for a first receiver of a terminal; and a step of transmitting the LP-WUS to the first receiver of the terminal based on the resource; wherein the LP-WUS is composed of 11 RBs (resource blocks).

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

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

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

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

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

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

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

[0016] Figure 3 illustrates the SSB structure.

[0017] FIGS. 4 to 10 are drawings for explaining a signal transmission and reception method according to an embodiment of the present invention.

[0018] Figures 11 to 14 illustrate devices according to embodiments of the present invention.

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

[0020] For clarity, the description is based on a 3GPP communication system (e.g., LTE, NR), but the technical idea of ​​the present invention is not limited thereto. LTE refers to technology after 3GPP TS 36.xxx Release 8. Specifically, LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A, and LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro. 3GPP NR refers to technology after TS 38.xxx Release 15. LTE / NR may be referred to as a 3GPP system. "xxx" refers to a standard document detail number. LTE / NR may be collectively referred to as a 3GPP system. For background technology, terms, abbreviations, etc. used in the description of the present invention, reference may be made to matters described in standard documents published prior to the present invention. For example, reference may be made to the following documents.

[0021] 3GPP NR

[0022] - 38.211: Physical channels and modulation

[0023] - 38.212: Multiplexing and channel coding

[0024] - 38.213: Physical layer procedures for control

[0025] - 38.214: Physical layer procedures for data

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

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

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

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

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

[0031] [Table 1]

[0032]

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

[0034] [Table 2]

[0035]

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

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

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

[0039] [Table 3]

[0040]

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

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

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

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

[0045] Figure 3 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.

[0046] 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.

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

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

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

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

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

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

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

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

[0055] Figure 4 shows option OOK-1.

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

[0057] Figure 5 shows option OOK-2.

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

[0059] Figure 6 shows option OOK-3.

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

[0061] Figure 7 shows option OOK-4.

[0062] Referring to Fig. 7, in option OOK-4, an M-bit OOK in the time domain is transformed. N subcarriers of OOK-1 are generated by a transformation (DFT / Least Square). N' samples are generated from the M bits. Signal modification may or may not be used. Truncation or other additional modifications may or may not be used. If not used, N and N' are the same. N' can be equal to K.

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

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

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

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

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

[0068] Meanwhile, the LP-WUS signal may use an overlaid sequence together with the OOK waveform. Depending on how the overlaid sequence is overlaid on each OOK signal or OFDM signal, it may affect the LP-WUS transmission time and / or the frequency resources occupied by the LP-WUS. Additionally, if some information is transmitted through the overlaid sequence, this may be a way to expand the utilization of the LP-WUS signal. However, not all LP-WUSs can detect / decode the overlaid sequence. If the overlaid sequence modulates each subcarrier in the frequency domain, only LP-WUSs that have FFT and / or frequency-domain sequence correlation capabilities can receive the overlaid sequence. Even if the sequence is overlaid on each OOK symbol or OFDM symbol in the time domain, only LP-WUSs that have sequence correlation capabilities in the time domain can receive the sequence. Since the lowest complexity LP-WUR may only distinguish ON / OFF of the OOK symbol, the overlay sequence needs to be designed considering these various types of LP-WUR.

[0069] Meanwhile, a separate LP-SS (low power synchronization signal) may be defined and transmitted to synchronize the time / frequency required for receiving the LP-WUR transmitted from the LP-WUR. The LP-SS may be a signal / waveform generated according to an OOK or FSK waveform generation method (similar to the LP-WUS), and an overlay sequence may be applied. The LP-SS may be a signal transmitted periodically or aperiodically. Based on the LP-SS, the LP-WUR may measure the power of the received signal, etc., to offload or relax the RRM measurement of the MR.

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

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

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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 '■'.

[0076] [Method #1] How to set the offset / gap between LP-SS and LP-WUS opportunities

[0077] 1-1) Receiving end (Receiver, Entity A):

[0078] ● The terminal can be set / instructed to set / receive a time offset of a specific amount of time between the (periodic) opportunity of LP-SS and the (periodic) opportunity of LP-WUS. For example, the terminal can set LP-SS opportunity through a separate setting, and the time after T1 from each LP-SS opportunity can be set / determined as the LP-WUS opportunity. Alternatively, the terminal can set LP-WUS opportunity through a separate setting, and the time before / after T1 from each LP-WUS opportunity can be set / determined as the LP-SS opportunity.

[0079] ■ The terminal can set / be instructed to set time offsets for multiple LP-WUS opportunities from one LP-SS opportunity. For example, the terminal can be configured with upper layer parameters for X time offsets from a periodic LP-SS opportunity to X LP-WUS opportunities.

[0080] ● The terminal can set / be instructed to set a minimum time interval between LP-SS opportunities and LP-WUS opportunities. For example, the terminal is separately configured for LP-SS opportunities and is configured with a minimum time interval T2 from each LP-SS opportunity. The terminal may not monitor LP-WUS for at least T2 after receiving LP-SS. Alternatively, the terminal is separately configured for LP-WUS opportunities and is configured with a minimum time interval T2 from each LP-WUS opportunity. The terminal may not monitor LP-SS for at least T2 after receiving LP-WUS.

[0081] ● The terminal can set / be instructed to set the maximum offset time between LP-SS opportunities and LP-WUS opportunities. For example, the terminal can be configured with LP-SS opportunities separately, and the maximum offset time T3 is set from each LP-SS opportunity. The terminal can monitor LP-WUS until at most T3 after receiving LP-SS. Alternatively, the terminal can be configured with LP-WUS opportunities separately, and the maximum offset time T3 is set from each LP-WUS opportunity. The terminal can monitor LP-SS until at most T3 after receiving LP-WUS.

[0082] ● The above T (i.e. T1 / T2 / T3) values ​​are

[0083] ■ It may be a pre-determined value. Alternatively, the terminal may be set to the T value through a higher layer parameter. Alternatively, the terminal may be set / instructed to the T value through LP-SS.

[0084] ■ The above T value can be set in time units such as msec, or as the number of OOK / OFDM symbols or the number of NR / MR slots.

[0085] ■ The above T value may be set from the end time of the preceding LP-SS (or LP-WUS) opportunity to the start time of the LP-WUS (or LP-SS) opportunity. Alternatively, the above T value may be set from the start time of the preceding LP-SS (or LP-WUS) opportunity to the start time of the LP-WUS (or LP-SS) opportunity.

[0086] ● LP-WUS transmission / monitoring opportunities are set to be transmitted within the maximum time offset from the (periodic) LP-SS opportunity.

[0087] ■ The maximum time offset can be set via RRC, SIB, etc.

[0088] ◆ Can be set in msec units or by the number of OOK / OFDM or slots.

[0089] ◆ When the terminal receives LP-SS, it sets or resets the counter, decreases the counter by OOK symbol or OFDM symbol, and when the counter expires, it can determine that it is the maximum time offset.

[0090] ■ The above time offset may mean the interval between LP-SS and LP-WUS that are transmitted with the same beam (or can assume the same QCL).

[0091] ■ The above maximum time offset can be determined as X times the periodicity of the LP-SS (X can be determined or set as 1, 0.5, etc.)

[0092] ■ If the terminal does not receive LP-WUS (the first or last OOK symbol) within the maximum time offset, it is determined that LP-WUS was not received.

[0093] ■ The terminal does not expect to receive LP-WUS outside of the time window up to the maximum time offset after receiving LP-SS.

[0094] ● The transmission / monitoring opportunity of LP-WUS is set to be transmitted within the maximum time offset from the reception of SSB (PSS / SSS).

[0095] ■ The maximum time offset can be set via RRC, SIB, etc.

[0096] ◆ Can be set in msec units or by the number of OOK / OFDM or slots.

[0097] ◆ When the terminal receives LP-SS, it sets or resets the counter, decreases the counter by OOK symbol or OFDM symbol, and when the counter expires, it can determine that it is the maximum time offset.

[0098] ■ The above time offset may mean the interval between LP-SS and LP-WUS that are transmitted with the same beam (or can assume the same QCL).

[0099] ■ The above maximum time offset can be determined as X times the periodicity of the LP-SS (X can be determined or set as 1, 0.5, etc.)

[0100] ■ If the terminal does not receive LP-WUS (the first or last OOK symbol) within the maximum time offset, it is determined that LP-WUS was not received.

[0101] ■ The terminal does not expect to receive LP-WUS outside the time window up to the maximum time offset above after receiving LP-SS.

[0102] 1-2) Transmitter (Entity B):

[0103] ● The base station can set / indicate a time offset of a specific amount of time between the (periodic) opportunity of LP-SS and the (periodic) opportunity of LP-WUS. For example, the base station can set LP-SS opportunity to the terminal through a separate setting, and set / determine the time after T1 from each LP-SS opportunity as the LP-WUS opportunity. Alternatively, the base station can set LP-WUS opportunity through a separate setting, and set / determine the time before / after T1 from each LP-WUS opportunity as the LP-SS opportunity.

[0104] ■ The base station can set / indicate time offsets for multiple LP-WUS opportunities from one LP-SS opportunity. For example, X time offsets from a periodically transmitting LP-SS opportunity to X LP-WUS opportunities can be set via upper layer parameters.

[0105] ● The base station can set / indicate the minimum time interval between LP-SS opportunities and LP-WUS opportunities. For example, the base station sets LP-SS opportunities in a separate configuration and sets the minimum time interval T2 from each LP-SS opportunity. The base station may not transmit LP-WUS for at least T2 after transmitting LP-SS. Alternatively, the base station sets LP-WUS opportunities in a separate configuration and sets the minimum time interval T2 from each LP-WUS opportunity. The base station may not transmit LP-SS for at least T2 after transmitting LP-WUS.

[0106] ● The base station can set / indicate the maximum offset time between LP-SS opportunities and LP-WUS opportunities. For example, the base station sets LP-SS opportunities in a separate configuration, and sets the maximum offset time T3 from each LP-SS opportunity. The base station can set / indicate that LP-WUS can be transmitted within at most T3 after LP-SS is transmitted. Alternatively, the base station sets LP-WUS opportunities in a separate configuration, and sets the maximum offset time T3 from each LP-WUS opportunity. The base station can set / indicate that LP-SS can be transmitted within at most T3 after LP-WUS is transmitted.

[0107] ● The above T (i.e. T1 / T2 / T3) values ​​are

[0108] ■ It may be a pre-determined value. Alternatively, the base station may set the T value through a higher layer parameter. Alternatively, the base station may set / indicate the T value through LP-SS.

[0109] ■ The above T value can be set in time units such as msec, or as the number of OOK / OFDM symbols or the number of NR / MR slots.

[0110] ■ The above T value may be set from the end time of the preceding LP-SS (or LP-WUS) opportunity to the start time of the LP-WUS (or LP-SS) opportunity. Alternatively, the above T value may be set from the start time of the preceding LP-SS (or LP-WUS) opportunity to the start time of the LP-WUS (or LP-SS) opportunity.

[0111] ● LP-WUS transmission / monitoring opportunities are set to be transmitted within the maximum time offset from the (periodic) LP-SS opportunity.

[0112] ■ The maximum time offset can be set via RRC, SIB, etc.

[0113] ◆ Can be set in msec units or by the number of OOK / OFDM or slots.

[0114] ◆ When the terminal receives LP-SS, it sets or resets the counter, decreases the counter by OOK symbol or OFDM symbol, and when the counter expires, it can determine that it is the maximum time offset.

[0115] ■ The above time offset may mean the interval between LP-SS and LP-WUS that are transmitted with the same beam (or can assume the same QCL).

[0116] ■ The above maximum time offset can be determined as X times the periodicity of the LP-SS (X can be determined or set as 1, 0.5, etc.)

[0117] ■ If the terminal does not receive LP-WUS (the first or last OOK symbol) within the maximum time offset, it is determined that LP-WUS was not received.

[0118] ■ The terminal does not expect to receive LP-WUS outside of the time window up to the maximum time offset after receiving LP-SS.

[0119] ● The transmission / monitoring opportunity of LP-WUS is set to be transmitted within the maximum time offset from the reception of SSB (PSS / SSS).

[0120] ■ The maximum time offset can be set via RRC, SIB, etc.

[0121] ◆ Can be set in msec units or by the number of OOK / OFDM or slots.

[0122] ◆ When the terminal receives SSB (PSS / SSS), it sets or resets the counter, decreases the counter by OOK symbol or OFDM symbol, and when the counter expires, it can determine that it is the maximum time offset.

[0123] ■ The above time offset may refer to the interval between SSB (PSS / SSS) and LP-WUS transmitted on the same beam (or assuming the same QCL).

[0124] ■ The above maximum time offset can be determined as X times the periodicity of the corresponding SSB (PSS / SSS) (X = 1, 0.5, etc. can be determined or set)

[0125] ■ If the terminal does not receive LP-WUS (the first or last OOK symbol) within the maximum time offset, it is determined that LP-WUS was not received.

[0126] ■ The terminal does not expect to receive LP-WUS outside the time window up to the maximum time offset above after receiving SSB (PSS / SSS).

[0127] [Method #2] How to set the LP-SS opportunity to a half frame of 5ms

[0128] 2-1) Receiver (Entity A):

[0129] ● The terminal can set / instruct the LP-SS opportunity (Cell transmitting the corresponding LP-SS) to one of two half frames within a 10ms system frame.

[0130] ● The terminal can be instructed to select a valid opportunity from among the pre-configured LP-SS opportunities in half-frame units. The terminal can set / instruct one of the two half-frames within the system frame through upper layer parameters.

[0131] ● The terminal can set / be instructed via upper layer parameters whether the LP-SS opportunity is located in the same half-frame as the SSB. For example, 1 can mean the same half-frame, and 0 can mean different half-frames.

[0132] ■ In this case, the terminal can determine the half frame in which the SSB is received through the most recently received SSB in the cell for receiving the LP-SS.

[0133] 2-2) Transmitter (Entity B):

[0134] ● The base station can set / indicate the LP-SS opportunity (Cell transmitting the corresponding LP-SS) to one of the two half frames within a 10ms system frame.

[0135] ● The base station can indicate a valid opportunity among the LP-SS opportunities set separately in advance in half-frame units. To do this, the base station can set / indicate one of the two half-frames within the system frame through a higher layer parameter.

[0136] ● The base station can set / indicate via a higher layer parameter whether the LP-SS opportunity is transmitted in the same half-frame as the SSB. For example, 1 can mean the same half-frame, and 0 can mean different half-frame.

[0137] ■ In this case, the half frame in which the SSB is transmitted can be determined based on the most recently transmitted SSB in the cell in which the base station transmits the LP-SS, and the half frame indication flag.

[0138] [Method #3] How to set multiple MOs for LP-SS / LP-WUS per UE sub-group

[0139] 3-1) Receiver (Entity A):

[0140] ● The terminal is set up with LP-SS / LP-WUS opportunities, and separately, the offset for LP-SS / LP-WUS opportunities can be set / instructed for each (sub-)group of the terminal.

[0141] ■ The above offset can be set in the time domain or the frequency domain, or in both the time domain and the frequency domain.

[0142] ■ The above (sub-)group may be the same as the subgroup for paging (e.g., sub-grouping for PEI), or a separate subgroup may be defined / set.

[0143] 2) Transmitter (Entity B):

[0144] ● The base station sets the LP-SS / LP-WUS opportunity, and separately sets / indicates the offset for the LP-SS / LP-WUS opportunity for each (sub-)group of terminals.

[0145] The above offset can be set in the time domain, the frequency domain, or both the time domain and the frequency domain.

[0146] ■ The above (sub-)group may be the same as the subgroup for paging (e.g., sub-grouping for PEI), or a separate subgroup may be defined / set.

[0147] [Method #4] How to set the BW (bandwidth) and frequency position of LP-SS / LP-WUS

[0148] In the proposal described below, the BW setting can be a RB unit (or RE unit) setting.

[0149] 4-1) Receiver (Entity A):

[0150] ● The terminal can set / instruct or determine the BW of LP-SS / LP-WUS through one or more of the following methods.

[0151] ■ Alt-1: The terminal can set the number of RBs of LP-SS / LP-WUS through upper layer parameters.

[0152] ■ Alt-2: The terminal can set the number of RBs of LP-SS / LP-WUS to the same BW as SSB (or PSS / SSS) or CORESET#0. Alternatively, the terminal can assume the BW of SSB set when MR makes the initial connection or the BW of the initial BWP of NR as the BW of LP-SS / LP-WUS and monitor the LP-SS / LP-WUS signal. Or, in another way,

[0153] ◆ Alt-2a: Same as the BW of PSS / SSS, the BW of LP-SS is set to 127 subcarriers (or 10 or 11 RBs) or 128 subcarriers.

[0154] ◆ Alt-2b: Set to 3.6 / 7.2 MHz for each case according to SCS 15kHz / 30kHz set in SSB

[0155] ◆ Alt-2c: Same as BW of CORESET#0, set to 4.32 / 8.64 MHz (according to SCS of CORESET#0)

[0156] ◆ Alt-2d: Set to the same BW as 15kHz SSB or CORESET#0, regardless of SCS of SSB or CORESET#0.

[0157] ■ Alt-3: BW of SSB (or PSS / SSS or CORESET#0) and LP-SS / LP-WUS BW ratio are set / indicated (e.g., 1 / 2x, 2x, …)

[0158] ■ Alt-4: The terminal can set / receive the BW of the LP-SS / LP-WUS as X consecutive RBs or X MHz from the BW of a specific signal / channel of NR transmitted in the cell where the LP-SS / LP-WUS is received. At this time, the starting point of the BW of the LP-SS / LP-WUS can be the lowest / highest RE among the REs set to the specific signal / channel. The BW of the LP-SS / LP-WUS can be set to overlap with the specific signal / channel. X can be predetermined or set / indicated by a higher layer parameter. For example, the BW of the LP-SS / LP-WUS can be set as X consecutive RBs or X MHz (e.g., 12 RBs or 5 MHz) from the lowest / highest RE set in the SSB or CORESET#0 set / transmitted in the corresponding cell.

[0159] ■ Alt-5: The terminal can set / receive the BW of the LP-SS / LP-WUS as X consecutive RBs or X MHz from the BWP of the terminal set in the cell where the LP-SS / LP-WUS is received. The starting point of the BW of the LP-SS / LP-WUS can be the lowest / highest RE of the BWP. The BW of the LP-SS / LP-WUS can be set to overlap with the specific signal / channel. X can be predetermined or set / referred to by a higher layer parameter. For example, for a terminal in idle mode / inactive mode, the BW of the LP-SS / LP-WUS can be set as X consecutive RBs or X MHz (e.g., 12 RBs or 5 MHz) from the lowest / highest RE of the initial BWP of the corresponding cell. For a terminal in connected mode, the BW of LP-SS / LP-WUS can be set to X consecutive RBs or X MHz (e.g., 12 RBs or 5 MHz) from the lowest / highest RE of the active BWP of the terminal (MR) of the cell.

[0160] ● Alternatively, if the BW of the LP-SS is set according to one of the above methods, the terminal can determine / judge the BW of the LP-WUS as a multiple thereof. Alternatively, the terminal can determine / judge the BW of the LP-SS as a divisor of the BW of the LP-WUS. The multiple / divisor includes itself.

[0161] 4-2) Transmitter (Transmitter, Entity B):

[0162] ● The base station can set / instruct or determine the BW of the LP-SS / LP-WUS through one or more of the following methods:

[0163] ■ Alt-1: The base station can set the number of RBs of LP-SS / LP-WUS through upper layer parameters.

[0164] ■ Alt-2: The base station can set the number of RBs of LP-SS / LP-WUS to the same BW as SSB (or PSS / SSS) or CORESET#0. Alternatively, the base station can determine the BW of SSB set when the terminal (MR) makes the initial connection or the BW of the initial BWP of NR as the BW of LP-SS / LP-WUS and transmit the LP-SS / LP-WUS signal. Or in another way,

[0165] ◆ Alt-2a: Set the BW of LP-SS to 127 subcarriers (or 10 or 11 RBs) or 128 subcarriers, the same as the BW of PSS / SSS.

[0166] ◆ Alt-2b: Set to 3.6 / 7.2 MHz for each case according to SCS 15kHz / 30kHz set in SSB

[0167] ◆ Alt-2c: Set to 4.32 / 8.64 MHz (according to the SCS of CORESET#0) with the same BW as CORESET#0.

[0168] ◆ Alt-2d: Sets the BW to be the same as 15kHz SSB or CORESET#0, regardless of the SCS of SSB or CORESET#0.

[0169] ■ Alt-3: The base station sets / indicates the BW of SSB (or PSS / SSS or CORESET#0) and the BW ratio of LP-SS / LP-WUS (e.g., 1 / 2x, 2x, …)

[0170] ■ Alt-4: The base station can set / indicate the BW of the LP-SS / LP-WUS to X consecutive RBs or X MHz from the BW of a specific signal / channel of NR transmitted in the cell transmitting the LP-SS / LP-WUS. At this time, the starting point of the BW of the LP-SS / LP-WUS can be the lowest / highest RE among the REs set to the specific signal / channel. The BW of the LP-SS / LP-WUS can be set to overlap with the specific signal / channel. X can be predetermined or set / indicated through a higher layer parameter. For example, the base station can set the BW of the LP-SS / LP-WUS to X consecutive RBs or X MHz (e.g., 12 RBs or 5 MHz) from the lowest / highest RE set in the SSB or CORESET#0 set / transmitted in the corresponding cell.

[0171] ■ Alt-5: The base station can set / indicate the BW of the LP-SS / LP-WUS to X consecutive RBs or X MHz from the BWP of the terminal set in the cell transmitting the LP-SS / LP-WUS. At this time, the starting point of the BW of the LP-SS / LP-WUS can be the lowest / highest RE of the BWP. The BW of the LP-SS / LP-WUS can be set to overlap with the specific signal / channel. X can be predetermined or set / indicated through a higher layer parameter. For example, the base station can set the BW of the LP-SS / LP-WUS to X consecutive RBs or X MHz (e.g., 12 RBs or 5 MHz) from the lowest / highest RE of the initial BWP of the corresponding cell for the terminal in idle mode / inactive mode. For a terminal in connected mode, the base station can set the BW of LP-SS / LP-WUS to X consecutive RBs or X MHz (e.g., 12 RBs or 5 MHz) from the lowest / highest RE of the active BWP of the terminal (MR) of the cell.

[0172] ● Alternatively, the base station can set the BW of the LP-SS according to one of the above methods, and then set the BW of the LP-WUS to a multiple thereof (or the BW of the LP-SS can be set to a divisor of the BW of the LP-WUS).

[0173] 4-3) Receiving end (Receiver, Entity A):

[0174] ● The terminal can set / receive the frequency domain location of LP-SS / LP-WUS through one or more of the following methods.

[0175] ■ Alt-1: The terminal can set the frequency location (e.g., ARFCN) of LP-SS / LP-WUS through upper layer parameters.

[0176] ■ Alt-2: The terminal can set the RB offset and RE offset from the lowest / highest RB / RE of SSB (or PSS / SSS or CORESET#0) to LP-SS / LP-WUS.

[0177] ● The terminal can receive the exact frequency location (e.g., ARFCN, offset from SSB, etc.) of the LP-SS / LP-WUS through the LP-SS / LP-WUS. After receiving / detecting the LP-SS / LP-WUS, the terminal can use this value to correct the residual frequency error.

[0178] ● The terminal can receive the LP-SS by aligning it with the NR CRB (common resource block) grid or the grid that is aligned with the subcarrier of CORESET#0. Alternatively, if the base station transmits the LP-SS with the same frequency grid as the SSB subcarrier, the terminal can separately set / be instructed about the frequency offset (RB / RE offset) between the grid and the CRB grid.

[0179] ● The terminal can set / receive the frequency location of the LP-SS / LP-WUS as X consecutive RBs or X MHz from the lowest / highest frequency of a specific signal / channel of NR transmitted in the cell where the LP-SS / LP-WUS is received. Here, X can be predetermined or set / received by a higher layer parameter. For example, the terminal can set the transmission frequency location of the LP-SS / LP-WUS as X consecutive RBs or X MHz (e.g., 12 RBs or 5 MHz) from the lowest / highest RE set in the SSB or CORESET#0 set / transmitted in the corresponding cell.

[0180] ● The terminal can set / be instructed to set the frequency location of the LP-SS / LP-WUS to X consecutive RBs or X MHz from the lowest / highest frequency of the BWP set in the cell where the LP-SS / LP-WUS is received. Here, X can be predetermined or set / instructed by a higher layer parameter. For example, for a terminal in idle mode / inactive mode, the frequency location of the LP-SS / LP-WUS can be set to X consecutive RBs or X MHz (e.g., 12 RBs or 5 MHz) from the lowest / highest RE of the initial BWP of the cell. For a terminal in connected mode, the frequency location of LP-SS / LP-WUS can be set to X consecutive RBs or X MHz (e.g., 12 RBs or 5 MHz) from the lowest / highest RE of the active BWP of the terminal (MR) of the cell.

[0181] ● The terminal may set the frequency position of the LP-SS according to one of the above methods, and may set the frequency position of the LP-WUS to X consecutive RBs or X MHz from the lowest / highest RB / RE of the frequency set in the LP-SS. Alternatively, the terminal may set the frequency position of the LP-WUS according to one of the above methods, and may set the frequency position of the LP-SS to X consecutive RBs or X MHz from the lowest / highest RB / RE of the frequency set in the LP-WUS. In this case, X may be predetermined or may be set / indicated through a higher layer parameter.

[0182] 4-4) Transmitter (Entity B):

[0183] ● The base station can set / indicate the frequency domain location of LP-SS / LP-WUS through one or more of the following methods.

[0184] ■ Alt-1: The base station can set the frequency location (e.g., ARFCN) of LP-SS / LP-WUS through upper layer parameters.

[0185] ■ Alt-2: The base station can set the RB offset, RE offset from the lowest / highest RB / RE of SSB (or PSS / SSS or CORESET#0) to LP-SS / LP-WUS.

[0186] ● The base station can transmit the exact frequency location of the LP-SS / LP-WUS (e.g., ARFCN, offset from SSB, etc.) through the LP-SS / LP-WUS.

[0187] ● The base station can transmit the LP-SS on a grid aligned with the CRB grid of NR or the subcarriers of CORESET#0. Alternatively, the base station can transmit the LP-SS on the same frequency grid as the subcarriers of SSB and separately set / indicate the frequency offset between that grid and the CRB grid.

[0188] ● The base station can set / indicate the frequency location of the LP-SS / LP-WUS to X consecutive RBs or X MHz from the lowest / highest frequency of a specific signal / channel of NR set / transmitted in the cell where the LP-SS / LP-WUS is transmitted. Here, X can be predetermined or set / indicated through a higher layer parameter. For example, the base station can set the transmission frequency location of the LP-SS / LP-WUS to X consecutive RBs or X MHz (e.g., 12 RBs or 5 MHz) from the lowest / highest RE set in the SSB or CORESET#0 set / transmitted in the cell.

[0189] ● The base station can set / indicate the frequency location of the LP-SS / LP-WUS to X consecutive RBs or X MHz from the lowest / highest frequency of the BWP set in the cell where the LP-SS / LP-WUS is transmitted. Here, X can be predetermined or set / indicated through a higher layer parameter. For example, the base station can set the frequency location of the LP-SS / LP-WUS to X consecutive RBs or X MHz (e.g., 12 RBs or 5 MHz) from the lowest / highest RE of the initial BWP of the cell for a terminal in idle mode / inactive mode. For a terminal in connected mode, the base station can set the frequency location of LP-SS / LP-WUS to X consecutive RBs or X MHz (e.g., 12 RBs or 5 MHz) from the lowest / highest RE of the active BWP of the terminal (MR) of the cell.

[0190] ● The base station may set the frequency position of the LP-SS according to one of the above methods, and set the frequency position of the LP-WUS to X consecutive RBs or X MHz from the lowest / highest RB / RE of the frequency set in the LP-SS. Alternatively, the base station may set the frequency position of the LP-WUS according to one of the above methods, and set the frequency position of the LP-SS to X consecutive RBs or X MHz from the lowest / highest RB / RE of the frequency set in the LP-WUS. In this case, X may be predetermined or set / indicated through a higher layer parameter.

[0191] [Method #5] Setting up each BWP (Initial / default / active BWP)

[0192] 5-1) Receiver, Entity A:

[0193] ● The terminal can be set / instructed through upper layer parameters in one or more of the following ways.

[0194] ■ Set through BWP settings (in this case, CP and SCS used to create LP-SS / LP-WUS are the same as the corresponding BWP settings)

[0195] ■ How to set the BW of LP-SS / LP-WUS with some RBs within BWP

[0196] ◆ Set the ratio of the corresponding BWP BW and set the RB or RE corresponding to the start / end position.

[0197] ■ How to set the position of LP-SS / LP-WUS with some RBs within BWP

[0198] ◆ Set the start / end position of the RB / RE or set it as an offset from the lowest / highest RE

[0199] ■ How to set LP-SS / LP-WUS only for BWP (or frequency) where either CD-SSB (cell defining-SSB) or NCD-SSB (non cell defining-SSB) is set

[0200] 5-2) Transmitter (Entity B):

[0201] ● The base station can be predefined in one or more of the following ways or set / instructed through upper layer parameters.

[0202] ■ Set through BWP configuration (in this case, CP and SCS used to create LP-SS / LP-WUS are the same as the corresponding BWP settings)

[0203] ■ How to set the BW of LP-SS / LP-WUS with some RBs within BWP

[0204] ◆ Set the ratio of the corresponding BWP BW and set the RB or RE corresponding to the start / end position.

[0205] ■ How to set the position of LP-SS / LP-WUS with some RBs within BWP

[0206] ◆ Set the start / end position of the RB / RE or set it as an offset from the lowest / highest RE

[0207] ■ How to set LP-SS / LP-WUS only for BWP (or frequency) where either CD-SSB or NCD-SSB is set

[0208] [Method #6] How to define a common frequency resource (CFR) for LP-SS / LP-WUS

[0209] 6-1) Receiving end (Receiver, Entity A):

[0210] ● The terminal can set / be instructed to set / be instructed to use common frequency resources (CFR) for LP-SS / LP-WUS for idle / inactive mode. At this time, the CFR can be set / instructed through upper layer parameters or can be predetermined.

[0211] ■ All idle / inactive mode UEs (or UE (sub)groups) supporting LP-WUR can monitor LP-SS / LP-WUS only in the corresponding CFR.

[0212] ■ CFR can be set within the initial BWP area or can be set to include the initial BWP (in which case it can be set to be equal to or greater than the initial BWP).

[0213] ◆ At this time, CP and SCS when generating LP-SS and LP-WUS are the same as the initial BWP.

[0214] ■ Alternatively, the above CFR settings may be CFR settings for LP-SS transmitted in idle mode / inactive mode and connected mode.

[0215] ● The terminal can set / be instructed to set / be instructed to set a common frequency resource (CFR) for LP-SS / LP-WUS for the connected mode. At this time, the CFR can be set / be instructed through a higher layer parameter or can be determined in advance. The CFR can be set for each BWP.

[0216] ■ All UEs (or UE (sub)groups) supporting LP-WUR can monitor LP-SS / LP-WUS only in the corresponding CFR.

[0217] ■ Set within each BWP area. The BWP of each UE supporting LP-WUR is set to include the corresponding CFR.

[0218] ◆ Or, multiple CFRs are set (by absolute frequency position), and the BWP of each UE is set to include at least one CFR.

[0219] ■ Alternatively, the above CFR setting may be a CFR setting for LP-SS transmitted in idle mode / inactive mode and connected mode.

[0220] ● A terminal can set / be instructed to set one CFR per cell. For example, a terminal can be set to a cell-specific CFR. In this case, the CFR can be set / instructed through a higher layer parameter or can be predetermined. In addition, the CFR can be set to different frequencies for each cell. Therefore, CFRs for each cell do not overlap in the frequency domain. For example, a terminal can be set to a cell-specific CFR and receive / monitor all LP-SS / LP-WUS of the corresponding cell on the corresponding CFR resource.

[0221] ● The terminal can set the frequency location of the LP-SS / LP-WUS transmitted per cell within the CFR (per terminal) set as described above. For example, for Cell#1 and Cell#2 set in the terminal, the terminal can set the transmission frequency location of the LP-SS / LP-WUS for Cell#1 at a specific frequency within the CFR, and can set the transmission frequency location of the LP-SS / LP-WUS for Cell#2 at a different specific frequency. As another example, for a plurality of cells set in the terminal, the terminal can set the transmission frequency location of the LP-SS / LP-WUS for the cell with the lowest / highest index at a specific frequency within the CFR, and can set or determine the frequency locations of other cells consecutively in order of cell index.

[0222] 6-2) Transmitter (Entity B):

[0223] ● The base station can set / indicate the common frequency resource (CFR) for LP-SS / LP-WUS for idle / inactive mode. At this time, the CFR can be set / indicated through a higher layer parameter or can be predetermined.

[0224] ■ All idle / inactive mode UEs (or UE (sub)groups) supporting LP-WUR can monitor LP-SS / LP-WUS only in the corresponding CFR.

[0225] ■ CFR can be set within the initial BWP area or can be set to include the initial BWP (in which case it can be set to be equal to or greater than the initial BWP).

[0226] ◆ At this time, CP and SCS when generating LP-SS and LP-WUS are the same as the initial BWP.

[0227] ■ Alternatively, the above CFR settings may be CFR settings for LP-SS transmitted in idle mode / inactive mode and connected mode.

[0228] ● The base station can set / indicate a common frequency resource (CFR) for LP-SS / LP-WUS for the connected mode. At this time, the CFR can be set / indicated through a higher layer parameter or can be predetermined. The CFR can be set for each BWP.

[0229] ■ All UEs (or UE (sub)groups) supporting LP-WUR can monitor LP-SS / LP-WUS only in the corresponding CFR.

[0230] ■ Set within each BWP area. The BWP of each UE supporting LP-WUR is set to include the corresponding CFR.

[0231] ◆ Or, multiple CFRs are set (by absolute frequency position), and the BWP of each UE is set to include at least one CFR.

[0232] ■ Alternatively, the above CFR setting may be a CFR setting for LP-SS transmitted in idle mode / inactive mode and connected mode.

[0233] ● The base station can set / indicate one CFR per cell. For example, the base station can set a cell-specific CFR. In this case, the CFR can be set / indicated through a higher layer parameter or can be determined in advance. In addition, the CFR can be set to different frequencies for each cell. Therefore, the CFRs for each cell do not overlap in the frequency domain. For example, the base station can set a cell-specific CFR and transmit the LP-SS / LP-WUS of the corresponding cell on the corresponding CFR resource.

[0234] ● The base station can set the frequency location of the LP-SS / LP-WUS transmitted per cell within the CFR (per terminal) set as described above. For example, the base station can set the transmission frequency location of the LP-SS / LP-WUS for Cell#1 at a specific frequency within the CFR for Cell#1 and set the transmission frequency location of the LP-SS / LP-WUS for Cell#2 at a different specific frequency. As another example, the base station can set the transmission frequency location of the LP-SS / LP-WUS for the cell with the lowest / highest index at a specific frequency within the CFR for multiple cells where the LP-SS / LP-WUS is transmitted, and can set or determine the frequency locations of other cells sequentially in order of cell index.

[0235] 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.

[0236] A-IoT (Ambient Internet of Things)

[0237] 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.

[0238] 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.

[0239] 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).

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] 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.

[0245] 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).

[0246] Implementation example

[0247] Figure 9 is a flowchart of a signal transmission and reception method according to embodiments of the present invention.

[0248] Referring to FIG. 9, 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.

[0249] 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.

[0250] The above signal may be an LP-SS and / or LP-WUS as described in the present specification. Even if expressed by another name, if the signal is a signal for triggering the operation of another receiver based on the signal being received by a specific receiver or a signal received by an A-IoT device, it may correspond to the LP-WUS of the present specification. In addition, even if expressed by another name, if the signal is a signal for synchronizing the LP-WUS, it may correspond to the LP-WUS of the present specification.

[0251] 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 reception of a signal of another receiver that consumes relatively less power, it may correspond to the primary receiver.

[0252] However, in the case of an A-IoT device, only the first receiver among the first and second receivers may be included.

[0253] In addition to the basic operation of FIG. 9, other operations disclosed in this specification may be combined.

[0254] Figure 10 is a flowchart that further concretizes a signal transmission and reception method according to an embodiment of the present invention.

[0255] Referring to FIG. 10, 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 setting resources of the LP-WUS (S1201), and a step of transmitting the LP-WUS based on the set resources (S1202).

[0256] 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.

[0257] In addition to the operation of FIG. 10, the operations disclosed in Method #1 to Method #6 may be performed.

[0258] For example, the range / location of the LP-SS and / or LP-WUS in the frequency domain can be determined based on method #4. For example, the LP-SS and / or LP-WUS can be composed of 11 RBs in the frequency domain.

[0259] The fact that the LP-SS and / or LP-WUS consists of 11 RBs can be determined based on the fact that the number of subcarriers of the PSS and / or SSS (within the SSB) received when the terminal performs the initial access through the second receiver is 127. Since 1 RB consists of 12 subcarriers in the frequency domain, 11 RBs corresponds to the minimum number of RBs that can include all 127 subcarriers. Since the LP-SS is a signal for synchronization, if a smaller amount of frequency resources than the PSS and SSS are used for synchronization, performance issues may occur between receivers, so it is desirable that at least 127 subcarriers or more are used as the frequency resources of the LP-SS. Meanwhile, as described in FIG. 3, the bandwidth of the PSS / SSS is 127 subcarriers, but the PSS / SSS always configures the SSB together with the PBCH and is transmitted and received with a bandwidth of 20 RB. As such, most conventional signals / channels are set in RB units as the minimum unit for frequency resource configuration when transmitted and received. Therefore, it may be advantageous to also set the bandwidth of LP-SS and / or LP-WUS in RB units. Since 1 RB includes 12 subcarriers in the frequency band, it is desirable that the bandwidth of LP-SS be set to ceil(127 / 12) = 11 RB. If 11 RBs are set for LP-SS, LP-WUS can also be transmitted in the set frequency resources, so it is desirable that LP-WUS is also set to 11 RBs. Since LP-SS and LP-WUS are signals that aim to reduce power consumption of the terminal and the information that can be included is limited, even if frequency resources larger than 11 RBs are allocated, the gain that can be obtained is not great, and it may be desirable to configure them with 11 RBs.

[0260] Accordingly, when the number of subcarriers of PSS and / or SSS is changed, the frequency domain range of LP-SS and / or LP-WUS can be changed to the minimum number of RBs that can include all of the corresponding number of subcarriers. The position of LP-SS and / or LP-WUS in the frequency domain can be set based on an offset set with respect to the position of SSB in the frequency domain, or can be set to 11 RBs on the lowest frequency domain or 11 RBs on the highest frequency domain within BWP, or can be set based on an offset set with respect to CRB.

[0261] The time interval between the reception opportunity of the LP-SS and the reception opportunity of the LP-WUS can be determined based on Method #1. For example, the time interval between the reception opportunity of the LP-SS and the reception opportunity of the LP-WUS can be set based on an offset of a specific time. Alternatively, a minimum time interval between the reception opportunity of the LP-SS and the reception opportunity of the LP-WUS is set, and the terminal can start monitoring the LP-WUS after the minimum time interval from the reception opportunity of the LP-SS. Alternatively, a maximum time interval between the reception opportunity of the LP-SS and the reception opportunity of the LP-WUS is set, and the terminal can perform monitoring of the LP-WUS within the maximum time interval from the reception opportunity of the LP-SS.

[0262] Additionally, the reception opportunity of LP-WUS may be located within the maximum time interval from the reception of SSB. The terminal may not monitor LP-WUS after the maximum time interval from the reception of SSB.

[0263] Additionally, referring to method #2, the reception opportunity of LP-SS can be set to be included in one of the two half frames within the system frame.

[0264] Additionally, resources for LP-SS and / or LP-WUS may be configured through BWP configuration according to Method #5. For example, LP-SS and / or LP-WUS may be configured only within a BWP in which either CD-SSB or NCD-SSB is configured.

[0265] CFRs for LP-SS and / or LP-WUS can be set according to method #6. Resources for LP-SS and / or LP-WUS are set only within the CFR set for the cell.

[0266] Examples of communication systems to which the present invention is applied

[0267] 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.

[0268] 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.

[0269] Figure 11 illustrates a communication system (1) applied to the present invention.

[0270] Referring to FIG. 11, 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.

[0271] 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).

[0272] 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.

[0273] Examples of wireless devices to which the present invention is applied

[0274] Figure 12 illustrates a wireless device applicable to the present invention.

[0275] Referring to FIG. 12, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} can correspond to {the wireless device (100x), the base station (200)} and / or {the wireless device (100x), the wireless device (100x)} of FIG. 11.

[0276] 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.

[0277] 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] 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.

[0282] Examples of wireless devices to which the present invention is applied

[0283] Figure 13 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 11).

[0284] Referring to FIG. 13, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 12 and may be composed of various elements, components, units / units, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and an additional element (140). The communication unit may include a communication circuit (112) and a transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 12. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 12. 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).

[0285] 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. 11, 100a), a vehicle (Fig. 11, 100b-1, 100b-2), an XR device (Fig. 11, 100c), a portable device (Fig. 11, 100d), a home appliance (Fig. 11, 100e), an IoT device (Fig. 11, 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. 11, 400), a base station (Fig. 11, 200), a network node, etc. Wireless devices may be mobile or stationary depending on the use / service.

[0286] In FIG. 13, 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.

[0287] Examples of vehicles or autonomous vehicles to which the present invention is applied

[0288] Figure 14 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.

[0289] Referring to FIG. 14, a vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a driving unit (140a), a power supply unit (140b), a sensor unit (140c), and an autonomous driving unit (140d). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 of FIG. 8, respectively.

[0290] 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.

[0291] 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.

[0292] 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.

[0293] 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 consists of 11 RBs (resource blocks). method.

2. In paragraph 1, The above LP-WUS is received based on the LP-SS (Low Power-Synchronization Signal) first received through the first receiver, The above LP-SS consists of 11 RBs. method.

3. In paragraph 2, The above LP-SS and the LP-WUS are composed of the 11 RBs based on the number of subcarriers of the PSS (Primary Synchronization Signal) or SSS (Secondary Synchronization Signal) received through the second receiver. method.

4. In paragraph 2, The position of the LP-SS or the LP-WUS in the frequency domain is set based on an offset set based on the position of the SSB (Synchronization Signal / physical broadcast channel Block) in the frequency domain. method.

5. In paragraph 2, The location of the above LP-SS or the above LP-WUS in the frequency domain is set to 11RB on the lowest frequency domain or 11RB on the highest frequency domain within the BWP (bandwidth part). method.

6. In paragraph 4, The position of the LP-SS or the LP-WUS in the frequency domain is set based on an RE (resource element) level offset set to match the CRB (common resource bock) grid of a signal other than the SSB among the signals for the second receiver. method.

7. In paragraph 2, The time interval between the reception opportunity of the above LP-SS and the reception opportunity of the above LP-WUS is set based on an offset of a specific time. method.

8. In paragraph 2, A minimum time interval between the reception opportunity of the above LP-SS and the reception opportunity of the above LP-WUS is set, Monitoring of the LP-WUS starts after the minimum time interval from the reception opportunity of the LP-SS. method.

9. In paragraph 2, A maximum time interval between the reception opportunity of the above LP-SS and the reception opportunity of the above LP-WUS is set, Monitoring of the LP-WUS is performed within the maximum time interval from the reception opportunity of the LP-SS. method.

10. In paragraph 1, The reception opportunity of the above LP-WUS is set within the maximum time interval from the reception of SSB (Synchronization Signal / physical broadcast channel Block). method.

11. In paragraph 2, The reception opportunity of the above LP-SS is included in one of the two half frames within the system frame. method.

12. In paragraph 2, The resources of the above LP-SS or the resources of the above LP-WUS are set only within the BWP (bandwidth part) in which at least one of the CD-SSB and NCD-SSB is set. method.

13. In paragraph 2, The resources of the above LP-SS or the resources of the above LP-WUS are set through the BWP (bandwidth part) setting. method.

14. In paragraph 2, The resources of the above LP-SS or the resources of the above LP-WUS are set only within the CFR (common frequency resource) set for each cell. method.

15. 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 consists of 11 RBs (resource blocks). Terminal.

16. 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 consists of 11 RBs (resource blocks). device.

17. 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 consists of 11 RBs (resource blocks). Storage media.

18. In a method performed by a base station in a wireless communication system, A step of setting up a resource of LP-WUS (Low Power-Wake Up Signal) for a first receiver of a terminal; A step of transmitting LP-WUS to the first receiver in the above resource; The above LP-WUS consists of 11 RBs (resource blocks). method.

19. In a base station operating in a wireless communication system, At least one transceiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform a specific operation; The above specific actions are: A step of setting up a resource of LP-WUS (Low Power-Wake Up Signal) for a first receiver of a terminal; A step of transmitting LP-WUS to the first receiver in the above resource; The above LP-WUS consists of 11 RBs (resource blocks). Base station.

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