WO2025211917A1 - Method and device for transmitting/receiving signal in wireless communication system - Google Patents

Abstract

An LP-WUS and/or an LP-SS received in a terminal of a wireless communication system through a low-power receiver may be received together with a conventional NR signal (an OFDM-based signal) from a base station. When the LP-WUS and/or the LP-SS and the conventional NR signal have at least one symbol overlapping in a time domain, the transmitting/receiving of the LP-WUS or the LP-SS may be omitted if SCSs between the overlapping signals are different from each other.

Description

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

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

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).

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.

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.

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

As one aspect of the present invention, a method performed by a terminal in a wireless communication system comprises: a step of setting a first resource for a first signal associated with a first receiver of the terminal; a step of setting a second resource for a second signal associated with a second receiver of the terminal; a step of omitting reception of the first signal in the first resource and receiving the second signal in the second resource based on (i) that the first resource and the second resource overlap and (ii) that a first SCS (SubCarrier Spacing) for the first signal and a second SCS for the second signal are different from each other; and

A method is provided, comprising: (i) receiving the first signal from the first resource and receiving the second signal from the second resource based on the overlapping of the first resource and (ii) the sameness of the first SCS and the second SCS; wherein the first signal is a Low Power-Wake Up Signal (LP-WUS) or a Low Power-Synchronization Signal (LP-SS).

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.

In another aspect of the present invention, a method performed by a base station in a wireless communication system is provided, comprising: setting a first resource for a first signal associated with a first receiver of a terminal; setting a second resource for a second signal associated with a second receiver of the terminal; omitting transmission of the first signal on the first resource and transmitting the second signal on the second resource based on (i) that the first resource and the second resource overlap and (ii) that a first SCS (SubCarrier Spacing) for the first signal and a second SCS for the second signal are different from each other; and transmitting the first signal on the first resource and the second signal on the second resource based on (i) that the first resource and the second resource overlap and (ii) that the first SCS and the second SCS are the same; wherein the first signal is a Low Power-Wake Up Signal (LP-WUS) or a Low Power-Synchronization Signal (LP-SS).

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.

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.

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.

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.

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.

Figure 1 illustrates the structure of a radio frame.

Figure 2 illustrates a resource grid of slots.

Figures 3 to 6 are drawings for explaining a signal transmission and reception method according to an embodiment of the present invention.

Figures 7 to 10 illustrate devices according to embodiments of the present invention.

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.

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.

3GPP NR

- 38.211: Physical channels and modulation

- 38.212: Multiplexing and channel coding

- 38.213: Physical layer procedures for control

- 38.214: Physical layer procedures for data

- 38.300: NR and NG-RAN Overall Description

- 38.331: Radio Resource Control (RRC) protocol specification

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

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).

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.

[Table 1]

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.

[Table 2]

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.

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.

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).

[Table 3]

Figure 2 illustrates the slot structure of an NR frame.

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.

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.

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).

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

Low Power Wake-Up Signal (LP-WUS) and Low Power-Synchronization Signal (LP-SS)

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.

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.

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.

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.

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

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

Figure 3 shows option OOK-1.

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).

Figure 4 shows option OOK-5.

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

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

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).

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

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

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

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.

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

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.

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.

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.

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.

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.

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.

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 '■'.

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

[Method #1] When the SCS of LP-WUS/LP-SS and NR signals/channels are different in the same CP-OFDM symbol

LP-WUS can be generated through CP-OFDM, which is one of the methods for generating a conventional NR signal/channel. NR signals/channels and LP-WUS can be transmitted together through the same CP-OFDM. At this time, the SCS for generating LP-WUS can be identical to the SCS of the corresponding CP-OFDM. LP-SS can be generated through CP-OFDM, which generates a conventional NR signal/channel, and NR signals/channels and LP-SS can be transmitted together through the same CP-OFDM. At this time, the SCS for generating LP-SS can be identical to the SCS of the corresponding CP-OFDM. As a result, the SCS for generating LP-WUS and LP-SS can be identical, and the SCS can be identical to the SCS of the CP-OFDM through which LP-WUS/LP-SS is transmitted.

If the SCS of CP-OFDM transmitted in different transmission opportunities of LP-WUS/LP-SS (e.g., opportunity #1, opportunity #2) are different, the LP-WUS/LP-SS may be generated and transmitted with different SCSs. In this case, a terminal receiving both LP-WUS/LP-SS in the two opportunities may need to detect signals generated with different SCSs. For example, in opportunity #1, the LP-WUS/LP-SS generated with 15 kHz SCS may be transmitted with the same CP-OFDM as the NR signal, and in opportunity #2, the LP-WUS/LP-SS generated with 30 kHz SCS may be transmitted with the same CP-OFDM as the NR signal. As another example, with two opportunities set for LP-WUS/LP-SS, an NR signal generated with 15 kHz SCS is transmitted in opportunity #1, and an NR signal generated with 120 kHz is transmitted in opportunity #2, and LP-WUS/LP-SS can be transmitted in both of the above two opportunities.

1) Transmitter (Entity A):

● When SCS and (periodic) transmission opportunities for LP-WUS/LP-SS are set, if the SCS of the NR signal/channel or the SCS of CP-OFDM that should be transmitted together with the LP-WUS/LP-SS at a specific transmission opportunity is different from the SCS of the LP-WUS/LP-SS, the base station may not transmit the LP-WUS/LP-SS at that opportunity. The transmission opportunity may be a specific (periodic) slot(s), symbol(s) and/or a specific frequency (e.g., RB, RE).

■ Example: When LP-WUS/LP-SS is generated with 15kHz SCS and is set to be transmitted at a specific cycle, if the SCS of CP-OFDM transmitted simultaneously in the opportunity of the LP-WUS/LP-SS is 15kHz, the base station transmits the LP-WUS/LP-SS, and if not, the base station can skip the transmission of the LP-WUS/LP-SS in the opportunity. For example, if the SCS of CP-OFDM is an SCS greater than 15kHz SCS (e.g., 30kHz), the base station can skip the transmission of the LP-WUS/LP-SS in the opportunity.

■ Example: When LP-WUS/LP-SS is generated with 15kHz or 30kHz SCS and is set to be transmitted at a specific cycle, if the SCS of CP-OFDM transmitted simultaneously in the opportunity of the LP-WUS/LP-SS is 15kHz (or 30kHz), the base station transmits the LP-WUS/LP-SS generated with 15kHz (or 30kHz) SCS, and if not, the base station can skip the transmission of the LP-WUS/LP-SS in the opportunity. For example, if the SCS of CP-OFDM is 120kHz, the base station can skip the transmission of the LP-WUS/LP-SS in the opportunity.

● When SCS (SCS#1) and (periodic) transmission opportunities for LP-WUS/LP-SS are set, if the NR signal/channel or SCS (SCS#2) of CP-OFDM transmitted simultaneously in a specific opportunity is different from the SCS (SCS#1) of the LP-WUS/LP-SS, the base station may not transmit the periodic LP-WUS/LP-SS generated with SCS#1 in the corresponding opportunity. The transmission opportunity may be a specific (periodic) slot(s), symbol(s) and/or a specific frequency (e.g., RB, RE). Instead, the base station may transmit the aperiodic LP-WUS/LP-SS generated with SCS#2. In this case, the aperiodic LP-WUS/LP-SS may be transmitted in front of the LP-WUS/LP-SS in the form of a preamble or may be transmitted through separate time/frequency resources.

■ Example: When a periodic LP-WUS/LP-SS is generated with a 15kHz SCS and is set to be transmitted at a specific period, if the SCS of CP-OFDM transmitted simultaneously at the opportunity of the LP-WUS/LP-SS is 15kHz, the base station transmits the periodic LP-WUS/LP-SS, and if not (for example, if a 30kHz NR signal is transmitted), the base station can skip the transmission of the periodic LP-WUS/LP-SS generated with a 15kHz SCS at the opportunity and transmit the aperiodic LP-WUS/LP-SS generated with a 30kHz SCS.

■ Example: When a periodic LP-WUS/LP-SS is generated with a 15kHz or 30kHz SCS and is set to be transmitted at a specific period, if the SCS of CP-OFDM simultaneously transmitted at the opportunity of the LP-WUS/LP-SS is 15kHz (or 30kHz), the base station transmits the periodic LP-WUS/LP-SS generated with a 15kHz (or 30kHz) SCS, and if not (for example, if an NR signal of a 120kHz SCS is transmitted), the base station can skip the transmission of the periodic LP-WUS/LP-SS generated with a 15kHz (or 30kHz) SCS at the opportunity and transmit the aperiodic LP-WUS/LP-SS generated with a different SCS (for example, 120kHz).

2) Receiving end (Receiver, Entity B):

● When an SCS for generating an LP-WUS/LP-SS and a (periodic) transmission opportunity for the same are set, and the SCS of an NR signal/channel or CP-OFDM that must be received simultaneously at a specific opportunity is different from the SCS of the LP-WUS/LP-SS, the terminal may not expect to transmit the LP-WUS/LP-SS at that opportunity. The transmission opportunity may be a specific (periodic) slot(s), symbol(s) and/or a specific frequency (e.g., RB, RE).

■ Example: When LP-WUS/LP-SS is generated with 15kHz SCS and is set to be transmitted at a specific cycle, if the SCS of CP-OFDM that must be simultaneously received in the corresponding LP-WUS/LP-SS reception opportunity is 15kHz, the terminal receives/monitors the LP-WUS/LP-SS, and if not, the terminal can skip receiving/monitoring the LP-WUS/LP-SS in the corresponding opportunity. For example, if the SCS of CP-OFDM is an SCS greater than 15kHz SCS (e.g., 30kHz), the terminal can skip receiving/monitoring the LP-WUS/LP-SS in the corresponding opportunity.

■ Example: When LP-WUS/LP-SS is generated with 15kHz or 30kHz SCS and is set to be transmitted at a specific cycle, if the SCS of CP-OFDM that must be simultaneously received in the corresponding LP-WUS/LP-SS reception opportunity is 15kHz (or 30kHz), the terminal receives/monitors the LP-WUS/LP-SS generated with 15kHz (or 30kHz) SCS, and if not, the terminal can skip receiving/monitoring the LP-WUS/LP-SS in the corresponding opportunity. For example, if the SCS of CP-OFDM is 120kHz, the terminal can skip receiving/monitoring the LP-WUS/LP-SS in the corresponding opportunity.

● When an SCS (SCS#1) for generating an LP-WUS/LP-SS and (periodic) reception opportunities for the same are set, if an NR signal/channel or CP-OFDM SCS (SCS#2) to be received at a specific opportunity is different from the SCS (=SCS1) of the LP-WUS/LP-SS, the terminal may not expect transmission of the periodic LP-WUS/LP-SS generated with SCS#1 at the opportunity, and may expect transmission of the aperiodic LP-WUS/LP-SS generated with SCS#2 instead. The transmission opportunity may be a specific (periodic) slot(s), symbol(s) and/or a specific frequency (e.g., RB, RE). In this case, the aperiodic LP-WUS/LP-SS may be received in front of the LP-WUS/LP-SS in the form of a preamble or may be received through separate time/frequency resources.

■ Example: When LP-WUS/LP-SS is generated with 15kHz SCS and is set to be received at a specific period, if the SCS of CP-OFDM that must be simultaneously received at the opportunity of the LP-WUS/LP-SS is 15kHz, the terminal receives/monitors the periodic LP-WUS/LP-SS, and if not (for example, if a NR signal of 30kHz is transmitted), the terminal skips receiving/monitoring the periodic LP-WUS/LP-SS generated with 15kHz at the opportunity, and can receive/monitor the aperiodic LP-WUS/LP-SS generated with 30kHz SCS.

■ Example: When LP-WUS/LP-SS is generated with 15kHz or 30kHz SCS and is set to be received at a specific period, if the SCS of CP-OFDM that must be simultaneously received at the opportunity of the LP-WUS/LP-SS is 15kHz (or 30kHz), the terminal receives/monitors the periodic LP-WUS/LP-SS generated with 15kHz (or 30kHz) SCS, and if not (for example, if an NR signal of 120kHz SCS is transmitted), the terminal skips the reception/monitoring of the periodic LP-WUS/LP-SS generated with 15kHz (or 30kHz) at the opportunity, and can receive/monitor the aperiodic LP-WUS/LP-SS generated with another SCS (for example, 120kHz).

[Method #2] When a dedicated LP-WUS/LP-SS BWP or LDFR (dedicated frequency resource for LP-WUS/LP-SS) is configured

The frequency resources (dedicated frequency resources or bandwidth parts) through which LP-WUS/LP-SS are transmitted can be configured for each cell (or each terminal). In this case, the relationship between the frequency resources and the (active) BWP of the MR can be defined. In the method described below, LDFR (dedicated frequency resources for LP-WUS/LP-SS) can refer to the frequency resources.

1) Transmitter (Entity A):

● If the frequency resources of LDFR and the specific BWP of MR overlap fully or partially, the base station transmits LP-WUS/LP-SS through the LDFR; otherwise, the base station may not transmit LP-WUS/LP-SS.

■ The above specific BWP may be the active BWP of the terminal, the default BWP, or the initial BWP.

■ The above specific BWP may be a frequency resource through which SSB is transmitted or a frequency resource through which CORESET#0 is transmitted.

■ In the case of the above partial overlap, the frequency range in which LP-WUS/LP-SS is transmitted may include at least the overlapped frequency range.

◆ In this case, the generated SCS of LP-WUS/LP-SS may be the same as the SCS set in the overlapping BWP.

◆ In this case, the transmission setting value of the corresponding LP-WUS/LP-SS can follow the setting value of the overlapping BWP.

● The base station can establish an association or linkage relationship between a specific BWP of LDFR and MR.

■ The base station can set the LDFR ID to be the same as the BWP ID of the associated/connected MR.

■ The setting values including SCS of LP-WUS/LP-SS transmitted to LDFR can be determined based on the settings of the associated/connected MR BWP.

◆ For example, the SCS of LP-WUS/LP-SS may be equal to the value of the associated/connected MR BWP.

◆ For example, the BW of an LP-WUS/LP-SS can be X times the associated/connected MR BWP. X can be set via upper layer parameters such as RRC, SIB, etc., or can be predefined or set via a preamble, etc. X can be an integer value greater than or equal to 1 (for each SCS) or a decimal value less than or equal to 1.

■ The above association/connection relationship can be set through upper layer parameters such as RRC and SIB, or can be defined in advance or set through a preamble, etc.

● The base station can establish an association or connection relationship between one LDFR and N MR BWPs.

■ The above N BWP(s) may include at least one of the terminal's active BWP, basic BWP, initial BWP, frequency resource through which SSB is transmitted, and frequency resource through which CORESET#0 is transmitted.

■ The SCS of LP-WUS/LP-SS transmitted through the above LDFR can follow the SCS of the active BWP or the initial BWP among the N BWPs.

■ The SCS of LP-WUS/LP-SS transmitted through the above LDFR can follow the SCS value set in the BWP that overlaps with the LDFR in the frequency domain among the N BWPs.

■ The same SCS can be set for the above N BWP(s).

■ The above N can be set through upper layer parameters such as RRC and SIB, or can be defined in advance or set through a preamble, etc.

■ The above association/connection relationship can be set through upper layer parameters such as RRC and SIB, or can be defined in advance or set through a preamble, etc.

● The base station can establish an association or connection relationship between N LDFRs and one specific MR BWP.

■ The above specific BWP may include at least one of the terminal's active BWP, basic BWP, initial BWP, frequency resource through which SSB is transmitted, and frequency resource through which CORESET#0 is transmitted.

■ The base station can set multiple LDFR IDs to be identical to the BWP ID of the associated/connected MR.

■ The SCS of LP-WUS/LP-SS transmitted through the above LDFR can follow the SCS of the associated/connected BWP.

■ The frequency resources of LP-WUS/LP-SS transmitted through the above LDFR may be the frequency resources of LDFR overlapping with the associated/connected BWP.

■ When the MR BWP associated/connected with the above LDFR is switched (through BWP switching, etc.), the previous N LDFRs can be identically associated/connected to the active BWP after switching.

■ The above N can be set through upper layer parameters such as RRC and SIB, or can be defined in advance or set through a preamble, etc.

■ The above association/connection relationship can be set through upper layer parameters such as RRC and SIB, or can be defined in advance or set through a preamble, etc.

2) Receiving end (Receiver, Entity B):

● If the frequency resources of LDFR and the specific BWP of MR overlap completely or partially, the terminal may receive/monitor LP-WUS/LP-SS through the LDFR; otherwise, the terminal may not receive/monitor LP-WUS/LP-SS.

■ The above specific BWP may be the active BWP of the terminal, the default BWP, or the initial BWP.

■ The above specific BWP may be a frequency resource for receiving SSB or a frequency resource for receiving CORESET#0.

■ In the case of the above partial overlap, the frequency range where LP-WUS/LP-SS is received/monitored may include at least the overlapped frequency range.

◆ In this case, the generated SCS of LP-WUS/LP-SS can be the same as the SCS set in the overlapping BWP. That is, the ON or OFF symbol duration of the OOK symbol can be determined from the corresponding SCS.

◆ In this case, the setting value of the corresponding LP-WUS/LP-SS can follow the setting value of the overlapping BWP.

● The terminal can establish an association/connection relationship between LDFR and a specific BWP of MR.

■ The terminal may set the LDFR ID to be the same as or assume the same as the BWP ID of the associated/connected MR.

■ The setting values including SCS of LP-WUS/LP-SS transmitted to LDFR can be determined based on the settings of the associated/connected MR BWP.

◆ For example, the SCS of LP-WUS/LP-SS can be equal to the value of the associated/connected MR BWP

◆ For example, the BW of an LP-WUS/LP-SS can be X times the associated/connected MR BWP. X can be set via upper layer parameters such as RRC, SIB, etc., or can be predefined or set via a preamble, etc. X can be an integer value greater than or equal to 1 (for each SCS) or a decimal value less than or equal to 1.

■ The above association/connection relationship can be set through upper layer parameters such as RRC and SIB, or can be defined in advance or set through a preamble, etc.

● A terminal can establish an association or connection relationship between one LDFR and N MR BWPs.

■ The above specific BWP(s) may include at least one of the terminal's active BWP, basic BWP, initial BWP, frequency resource where SSB is received, and frequency resource where CORESET#0 is received.

■ The SCS of the LP-WUS/LP-SS received through the above LDFR can be determined as the SCS of the active BWP or the initial BWP among the N BWPs.

■ The SCS of the LP-WUS/LP-SS received through the above LDFR can be determined by the SCS set in the BWP that overlaps with the LDFR in the frequency domain among the N BWPs.

■ The above specific BWP(s) may be cases where the same SCS is set.

■ The above N can be set through upper layer parameters such as RRC and SIB, or can be defined in advance or set through a preamble, etc.

■ The above association/connection relationship can be set through upper layer parameters such as RRC and SIB, or can be defined in advance or set through a preamble, etc.

● A terminal can establish an association or connection relationship between N LDFRs and one specific MR BWP.

■ The above specific BWP may include at least one of the terminal's active BWP, basic BWP, initial BWP, frequency resource where SSB is received, and frequency resource where CORESET#0 is received.

■ The terminal may set or assume multiple LDFR IDs to be identical to the BWP ID of the associated/connected MR.

■ The SCS of the LP-WUS/LP-SS received through the above LDFR can be determined as the SCS of the associated/connected BWP.

■ The frequency resources of LP-WUS/LP-SS received through the above LDFR may be the frequency resources of LDFR overlapping with the associated/connected BWP.

■ When the MR BWP associated/connected with the above LDFR is switched (through BWP switching, etc.), the previous N LDFRs can be identically associated/connected to the active BWP after switching.

■ The above N can be set through upper layer parameters such as RRC and SIB, or can be defined in advance or set through a preamble, etc.

■ The above association/connection relationship can be set through upper layer parameters such as RRC and SIB, or can be defined in advance or set through a preamble, etc.

[Method #3] Determining MR's Active BWP After Wake-up

A terminal receiving an LP-WUS/LP-SS can wake up the MR. Or, if the reception quality of the LP-WUS/LP-SS is poor or the terminal determines that it is located outside the coverage area of the LP-WUS/LP-SS, the terminal can wake up the MR. Or, the terminal can wake up the MR by a direct instruction from the base station. The method described below proposes a method for the terminal to set/determine the active BWP of the MR after wake-up in the above cases. In this case, the active BWP may mean the DL BWP that receives the NR signal/channel or the UL BWP that transmits, and may be interpreted as either (or both) unless otherwise specified. Or, it may mean a separate specific BWP other than the active BWP of the terminal.

1) Transmitter (Entity A):

● The base station can set the active BWP to be used after MR wake-up through upper layer parameters such as RRC and SIB.

■ The above BWP may be the last active BWP before MR enters sleep state.

■ The above BWP may be the initial BWP or basic BWP of MR.

■ The above BWP may be a BWP set in the MR by the firstActiveDownlinkBWP parameter.

◆ According to 3GPP TS 38.331 document, firstActiveDownlinkBWP is defined as follows:

- When configured for SpCell, this field is included in the RRCReconfiguration message included in the NR or E-UTRA RRC message indicating SCG deactivation when performing RRC (re)configuration, and contains the ID of the DL BWP to be activated or the ID of the DL BWP to be used for RLM, BFD and measurements. If this field is absent, RRC (re)configuration does not involve BWP change. If this field is absent for PSCell in SCG deactivation, the UE regards the DL BWP activated this time as the BWP to be used for RLM, BFD and measurements. When configured for SCell, this field contains the ID of the DL BWP to be used when activating the SCell. The initial BWP is referenced as BWP-Id=0. Upon reconfigurationWithSync, the network sets firstActiveDownlinkBWP-Id and firstActiveUplinkBWP to the same value.

(- If configured for an SpCell, this field contains the ID of the DL BWP to be activated or to be used for RLM, BFD and measurements if included in an RRCReconfiguration message contained in an NR or E-UTRA RRC message indicating that the SCG is deactivated, upon performing the RRC (re-)configuration. If the field is absent, the RRC (re-)configuration does not impose a BWP switch. If the field is absent for the PSCell at SCG deactivation, the UE considers the previously activated DL BWP as the BWP to be used for RLM, BFD and measurements. If the field is absent for the PSCell at SCG activation, the DL BWP previously to be used for an SCell, this field contains the ID of the downlink bandwidth part to be used upon activation of an SCell. =0. Upon reconfiguration with reconfigurationWithSync, the network sets the firstActiveDownlinkBWP-Id and firstActiveUplinkBWP-Id to the same value.)

◆ By setting the above RRC parameters, the base station can assume that the BWP indicated by firstActiveDownlinkBWP is used as the active DL BWP when the MR of a terminal supporting LP-WUS switches from a sleep state to a wake-up state.

● The base station can set the active BWP to be used after MR wake-up to one of the LDFRs described above.

■ The above BWP can be set to a BWP with LDFR among the BWPs set in the terminal.

■ The base station can separately set the active BWP of the MR to be used after wake-up through LDFR setting (or association/linkage setting between LDFR and MR BWP).

■ The base station can set the above BWP to the LDFR (or a BWP that overlaps therewith) containing the last (successfully) transmitted LP-WUS/LP-SS just before wake-up.

2) Receiving end (Receiver, Entity B):

● The terminal can determine the active BWP to be used after MR wake-up as follows or can be set through upper layer parameters such as RRC and SIB.

■ The above BWP may be the last active BWP before the MR enters the sleep state.

■ The above BWP may be the initial BWP or basic BWP of MR.

■ The above BWP may be the firstActiveDownlinkBWP set in MR.

◆ When a terminal supporting LP-WUS receives the above RRC parameters and wakes up from MR sleep state, it can use the BWP indicated by firstActiveDownlinkBWP as the active DL BWP.

◆ A terminal with CA (carrier aggregation) enabled can monitor LP-WUS in the S-cell (secondary cell). When the MR transitions from sleep to wakeup, the terminal can assume that the active DL BWP of the S-cell is the BWP indicated by firstActiveDownlinkBWP.

◆ For a terminal with CA set, when the MR wakes up due to an LP-WUS that triggers PDCCH monitoring in the S-cell (or PDCCH monitoring for scheduling within the S-cell), the terminal can assume that the active DL BWP of the S-cell is the BWP indicated by firstActiveDownlinkBWP.

● The terminal can determine the active BWP to be used after MR wake-up as follows or can be set to one of the LDFRs described above.

■ The above BWP can be set/determined as a BWP that completely/partially overlaps with LDFR among the BWPs set in the terminal.

■ Through LDFR configuration (or association/connection configuration between LDFR and MR BWP), the terminal can configure/determine the active BWP of the MR to be used after wake-up.

■ The terminal can set or determine the BWP as the LDFR (or BWP overlapping therewith) containing the last (successfully) received LP-WUS/LP-SS immediately before wake-up.

[Method #4] LP-WUS/LP-SS signal generation method when the BW of LP-WUS/LP-SS is set to 11 PRB

The DFT size (Discrete Fourier Transform size) used to generate DFT-s-OFDM signals for conventional NR UL supports the form of 2^a * 3^b * 5^c (where a, b, and c are integers greater than or equal to 0). If the DFT size is a multiple of 11, there may be implementation difficulties. Therefore, it may be advantageous to avoid a DFT size of 11 PRBs when generating LP-WUS/LP-SS signals using the OOK-4 method. In this section, we propose a method that can be considered when 11 PRBs are set as the BW of LP-WUS/LP-SS.

1) Transmitter (Entity A):

● When the BW of LP-WUS/LP-SS is set to 11 PRB, the base station can generate/transmit the LP-WUS/LP-SS signal using one or a combination of two or more of the methods below.

■ Method 1: If the channel is set to 11 PRB BW in LP-WUS/LP-SS, the base station can skip LP-WUS/LP-SS signal transmission when OOK-4 is set.

■ Method 2: If the channel is set to 11 PRB BW in LP-WUS/LP-SS, the base station can generate and transmit a signal as OOK-1 even if OOK-4 is set (if OOK-1 is also set).

■ Method 3: If the channel is configured with 11 PRB BW in LP-WUS/LP-SS, the base station can assume 10 PRB for LP-WUS information bit mapping and overlay sequence mapping and generate LP-WUS/LP-SS signal. The base station can assume 10 PRB before DFT, and LP-WUS information bit mapping and overlay sequence mapping can be performed, and DFT can be performed based on 10 PRB. In addition, the base station can add 1 PRB to the DFT result to map frequency resources of 11 PRB.

◆ In this method, the additional 1 PRB may correspond to the lowest RB or the highest RB among the 11 PRBs already allocated, or may correspond to 0.5 RB from the lowest RE and 0.5 RB from the highest RE (i.e., a total of 1 RB).

◆ In this method, the 1 PRB may be filled with 0 or used as a guard RB (or guard band). Alternatively, the 1 PRB may include a known sequence (recognizable by the terminal). Alternatively, the first (or last) 1 PRB value of 10 PRBs, which are DFT outputs, may be repeatedly mapped to the 1 PRB.

◆ In this method, the above 10 PRBs can be changed and applied as X PRB values in the form of 2^a * 3^b * 5^c. In this case, the content for the above 1 PRB can be replaced with (11-X) PRB.

■ Method 4: If the LP-WUS/LP-SS channel has 11 PRB BW, the base station can generate the LP-WUS/LP-SS signal assuming 12 PRB. In this case, the base station assumes 11 PRB before DFT and performs LP-WUS information mapping and overlay mapping, adds 1 RB to the length to perform DFT input, and the DFT can be performed with 12 PRB. In addition, the base station can map the frequency resource of 11 PRB by removing 1 PRB from the DFT result.

◆ In this method, the removal of 1 PRB after the DFT may correspond to the lowest RB or the highest RB of the 12 PRBs, or may correspond to 0.5 RB from the lowest RE and 0.5 RB from the highest RE (i.e., a total of 1 RB), and the addition of 1 RB length before the DFT may be performed to suit each case.

◆ In this method, the additional length of 1 RB before the DFT may be filled with 0, or a known sequence (recognizable to the terminal) may be transmitted. Alternatively, LP-WUS information bits of 11 RB length or data corresponding to the length of 1 RB before (or after) the overlay sequence may be added in the form of a prefix (or postfix).

◆ In this method, the above 12 PRBs can be changed and applied as X PRB values in the form of 2^a * 3^b * 5^c. In this case, the content for the above 1 PRB can be replaced with (X-11) PRB.

2) Receiving end (Receiver, Entity B):

● When the BW of LP-WUS/LP-SS is set to 11 PRB, the terminal can expect the LP-WUS/LP-SS signal to be transmitted in one or a combination of two or more of the following methods.

■ Method 1: If LP-WUS/LP-SS is a channel with 11 PRB BW set, the terminal may not expect transmission of the LP-WUS/LP-SS signal generated by OOK-4 or may skip monitoring the LP-WUS/LP-SS signal.

■ Method 2: If LP-WUS/LP-SS is a channel with 11 PRB BW set, the terminal can receive LP-WUS/LP-SS even if OOK-4 is set (if OOK-1 is also set) expecting the signal to be transmitted as OOK-1.

■ Method 3: If the channel is configured with 11 PRB BW in LP-WUS/LP-SS, the terminal can receive/detect the corresponding signal assuming that the LP-WUS information bits and overlay sequences are mapped to 10 PRBs. The terminal can detect the OOK symbol for the 10 PRBs obtained by removing 1 RPB from the received 11 PRBs, or detect the LP-WUS information bits and overlay sequences.

◆ In this method, the removed 1 PRB may correspond to the lowest RB or the highest RB among the 11 PRBs previously allocated, or may correspond to 0.5 RB from the lowest RE and 0.5 RB from the highest RE (i.e., a total of 1 RB).

◆ In this method, the 1 PRB may be filled with zeros or may serve as a guard RB (or guard band). Alternatively, the 1 PRB may transmit a known sequence (recognizable to the terminal). Alternatively, the 1 PRB may be repeatedly mapped to the first (or last) 1 PRB value of 10 PRBs, which are DFT outputs. The terminal may utilize this to improve reception performance.

◆ In this method, the above 10 PRBs can be changed and applied as X PRB values in the form of 2^a * 3^b * 5^c. In this case, the content for the above 1 PRB can be replaced with (11-X) PRB.

■ Method 4: If the channel is configured with 11 PRB BW in LP-WUS/LP-SS, the terminal can receive/detect the signal assuming that the LP-WUS information bits and overlay sequence are mapped to 11 PRBs. If the terminal receives the signal using IDFT (or IFFT), the terminal can assume that the size of the operation is 12 PRBs. For example, the terminal performs iDFT (inverse DFT) or iFFT by zero-padding 1 PRB to the 11 PRB signal. However, the terminal can assume that the LP-WUS information bits and overlay sequence are mapped to 11 PRBs.

◆ In this method, the 1 PRB may correspond to the lowest RB or the highest RB of the 12 PRBs, or may correspond to 0.5 RB from the lowest RE and 0.5 RB from the highest RE (i.e., a total of 1 RB).

◆ In this method, the 1 PRB may be filled with 0 or may contain a known sequence (recognizable by the terminal). LP-WUS information bits of 11 RB length or data corresponding to 1 RB length in front or behind the overlay sequence may be added in the form of a prefix or postfix.

◆ In this method, the above 12 PRBs can be changed and applied as X PRB values in the form of 2^a * 3^b * 5^c. In this case, the content for the above 1 PRB can be replaced with (X-11) PRB.

[Method #5] LP-WUS/LP-SS signal generation method when the BW of LP-WUS/LP-SS is set to 12 PRB

Table 4 shows the maximum transmission bandwidth (BW) (for data/control channel transmission) defined in RB units for each SCS by channel BW. Table 5 shows the minimum guard band defined in kHz units for each SCS by channel BW.

SCS
(kHz) 5 MHz 10MHz 15MHz 20MHz 25MHz 30MHz 35MHz 40MHz 45MHz 50MHz 60MHz 70MHz 80MHz 90MHz 100MHz N_RB N_RB N_RB N_RB N_RB N_RB N_RB N_RB N_RB N_RB N_RB N_RB N_RB N_RB N_RB 15 25 52 79 106 133 160 188 216 242 270 N/A N/A N/A N/A N/A 30 11 24 38 51 65 78 92 106 119 133 162 189 217 245 273 60 N/A 11 18 24 31 38 44 51 58 65 79 93 107 121 135

SCS
(kHz) 5 MHz 10MHz 15MHz 20MHz 25MHz 30MHz 35MHz 40MHz 45MHz 50MHz 60MHz 70MHz 80MHz 90MHz 100MHz 15 242.5 312.5 382.5 452.5 522.5 592.5 572.5 552.5 712.5 692.5 N/A N/A N/A N/A N/A 30 505 665 645 805 785 945 925 905 1065 1045 825 965 925 885 845 60 N/A 1010 990 1330 1310 1290 1630 1610 1590 1570 1530 1490 1450 1410 1370

If the BW of an LP-WUS/LP-SS generated with a 30 kHz SCS in a 5 MHz channel (or generated with a 60 kHz SCS in a 10 MHz channel) is set to 12 PRB, the LP-WUS/LP-SS signal needs to be transmitted beyond the maximum transmission BW defined in Table 4. This may mean that the minimum guard band defined in Table 5 is not secured. To solve this problem, this section proposes several methods for the case where the BW of an LP-WUS/LP-SS is set to 12 PRB.

1) Transmitter (Entity A):

● For a 5MHz channel, 30kHz SCS (or a 10MHz channel, 60kHz SCS), when the BW of LP-WUS/LP-SS is set to 12 PRB, the base station can generate/transmit the LP-WUS/LP-SS signal using one or a combination of two or more of the following methods.

■ Method 1: When the above conditions are met, the base station can use 11 PRBs with LP-WUS/LP-SS BW (same as UE channel BW).

■ Method 2: When the above conditions are met, the base station can generate and transmit LP-WUS/LP-SS as a 15kHz (for 5MHz channel) or 30kHz (for 10MHz) channel.

◆ When LP-WUS/LP-SS is generated with 15kHz SCS in a 5MHz channel, 25 PRB can be used as the BW of LP-WUS/LP-SS.

◆ When LP-WUS/LP-SS is generated with 30kHz SCS in a 10MHz channel, 24 PRB can be used as the BW of LP-WUS/LP-SS. Alternatively, the BW of LP-WUS/LP-SS generated with 15kHz SCS in a 10MHz channel can be 52 PRB.

◆ This method can be applied only when 15kHz SCS (or 30kHz) is supported (set) on the channel.

■ Method 3: When the above conditions are met, the highest guard band for the channel can be redefined.

◆ For example, by replacing N _RB with 12 RB in the formula 'GB _Channel = (BW _Channel x 1000 (kHz) - N _RB x SCS x 12) / 2 - SCS/2', the minimum guard band can be redefined as 325 kHz for 30 kHz SCS in the 5 MHz band and as 650 kHz for 60 kHz SCS in the 10 MHz band.

◆ For example, by replacing N _RB with 12 RB and omitting '-SCS/2' in the formula 'GB _Channel = (BW _Channel x 1000 (kHz) - N _RB x SCS x 12) / 2 - SCS/2', the minimum guard band can be redefined as 340 kHz for 30 kHz SCS in the 5 MHz band and as 680 kHz for 60 kHz SCS in the 10 MHz band.

◆ The applicability of this method may vary depending on adjacent channel/band conditions.

◆ The base station can instruct/set whether to apply the method through broadcast signaling (e.g., SSB/PBCH or SIB).

◆ The base station can determine/determine whether to apply the method based on the sync raster position. For example, if a separate sync raster is set for LP-WUS/LP-SS transmitting terminals (or a separate sync raster is set for channels below 5MHz (e.g., 3MHz), a terminal initially connected in such sync raster can assume the separately set LP-WUS/LP-SS BW.

■ Method 4: When the above conditions are met, LP-WUS/LP-SS transmission can be exceptionally allowed even in the minimum guard band for the corresponding channel.

◆ In this case, the frequency resource allocation of LP-WUS/LP-SS to be transmitted in the guard band may not include the minimum guard band redefined in the above method 3.

◆ The applicability of this method may vary depending on adjacent channel/band conditions.

◆ The base station can instruct/set whether to apply the method through broadcast signaling (e.g., SSB/PBCH or SIB).

◆ The base station can determine/determine whether to apply the method based on the sync raster position. For example, if a separate sync raster is set for LP-WUS/LP-SS transmitting terminals (or a separate sync raster is set for channels below 5MHz (e.g., 3MHz), a terminal initially connected in such sync raster can assume the separately set LP-WUS/LP-SS BW.

■ Method 5: The base station can determine the BW of LP-WUS/LP-SS for each channel BW through one of the options below.

◆ Option 1: 12 PRBs are applied to channel BW exceeding 5MHz, and 11 PRBs are applied to 5MHz channel BW. In this case, only OOK-1 method is applied to 5MHz channel BW, and OOK-4 method is not applied.

◆ Option 2: 12 PRB is applied for channel BW exceeding 5MHz, and 10 PRB is applied for channel BW of 5MHz.

◆ Option 3: 12 PRBs are applied for channel BW exceeding 5MHz, 11 PRBs are applied for LP-SS (by using padding/truncation before and after DFT in case of OOK-4), and 10 PRBs are applied for LP-WUS for channel BW above 5MHz.

■ Method 6: When the channel BW of the terminal is 3MHz (SCS 15kHz), 5MHz (SCS 30kHz), or 10MHz (SCS 60kHz), the minimum guard band requirement in Table 5 may not be followed, or the value redefined in Method 3 may be applied.

● The bandwidth of the LP-WUS/LP-SS signal can be set according to the sync raster.

2) Receiving end (Receiver, Entity B):

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

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

[Method #6] Repeated Transmission Method of LP-WUS/LP-SS Signals

● To increase coverage, LP-WUS can be transmitted repeatedly (at different times), and in this case, the terminal may need to decode the LP-WUS that is transmitted repeatedly from the LP-WUS that is not (i.e., does not correspond to the repeated transmission) by distinguishing between them.

■ The proposed method below is described for LP-WUS (for convenience). However, the same method can be applied/configured for LP-SS signals as well.

■ The terminal can combine repeatedly transmitted LP-WUS and decode the signal to be transmitted through LP-WUS.

■ The proposed method may be a method for distinguishing between LP-WUS #1 with N-times repeated transmission set and LP-WUS #2 with no repeated transmission set. Alternatively, the proposed method may be a method for distinguishing between the first transmission and other transmissions (i.e., the second, third, ..., Nth) for LP-WUS #3 with N-times repeated transmission set.

● The terminal can set/receive repeat transmission instructions through the following methods.

■ Whether to repeat transmission and the number of repeat transmissions are set through SIB (or UE dedicated (RRC) signaling).

■ Whether the LP-WUS to be received is a repeat transmission LP-WUS is indicated through the preamble transmitted with the LP-WUS signal (or before the LP-WUS).

■ Through the LP-WUS contents (e.g., it may be a separate 1 bit indicator), it can be indicated whether the same LP-WUS is to be repeatedly received after receiving the corresponding LP-WUS.

● If a terminal expecting repeated transmission does not receive the LP-WUS that is repeatedly transmitted at a specified time/opportunity (or for a specific period of time), one of the two methods below can be applied.

■ The terminal no longer expects repeat transmission and decodes the previously received LP-WUS.

■ The terminal may ignore/drop the LP-WUS instruction and report the reception failure to the base station. Alternatively, the terminal may wake up the MR in this case. Alternatively, the terminal may notify or request the base station to wake up the MR.

● When LP-WUS is repeatedly transmitted N times, the transmission opportunities of TDM (time division multiplexed) LP-WUS and repeatedly transmitted LP-WUS may be different.

■ The above repeated transmission LP-WUS may mean an LP-WUS that transmits the same content, and the above TDMed LP-WUS may mean an LP-WUS that transmits different content in different time resources.

■ Repeated transmission LP-WUS can be transmitted after a certain symbol/slot gap or in the next slot (the first symbol of the LP-WUS in which the content is initially transmitted or a symbol with the same symbol index/position within the slot).

■ TDM-encoded LP-WUSs can be transmitted continuously without separate symbol/slot intervals. Alternatively, TDM-encoded LP-WUSs can be transmitted with 1 OFDM symbol interval.

■ Alternatively, the symbol/slot interval between repeatedly transmitted LP-WUSs and the symbol/slot interval between TDMed LP-WUSs can be set/indicated through separate upper layer signaling (RRC, SIB).

● When multiple codepoints are transmitted via LP-WUS, and the number of UE subgroups is N, and each LP-WUS indicates one or more of X1 subgroups, each LP-WUS can contain at least ceil(log2(X1)) information bits. If multiple codepoints are used, K*ceil(log2(X1)) bits can be included in each LP-WUS. In this case, the value of K can be determined or set as follows.

■ Alt-1: K=M (or K=a*M), a can be an integer greater than or equal to 1 or a prime number of 1/2 or 1/4. LP-WUS TDRA (time domain resource allocation) can be limited to an appropriate length.

■ Alt-2: The relationship K*M=constant can be maintained or K=b/M can be determined.

■ The above a and b can be set/indicated through separate upper layer signaling (RRC, SIB).

● When multiple subgroup indices are indicated through TDMed LP-WUSs, the subgroup indices can be transmitted in descending order. For example, when wakeup is indicated for subgroups #1, #2, and #3 through three TDMed LP-WUSs, subgroup #1 can be indicated through the first LP-WUS, and the indications for #2 and #3 can be transmitted through the second/third LP-WUSs that follow.

● LP-WUS for subgroups of UEs monitoring the same PO can be transmitted through the same LP-WUS opportunity, while subgroups of UEs monitoring different POs can be transmitted at a different time than the corresponding LP-WUS (i.e., transmitted as TDMed LP-WUS).

● When terminals with the same or similar wake-up delay are grouped into subgroups, TDM LP-WUSs can be transmitted separately for each subgroup.

● How to distinguish LP-WUS transmitted to a terminal in idle mode/inactive mode and a terminal in connected mode

■ The terminal can be instructed which mode the LP-WUS is for through the preamble transmitted with (or before) the LP-WUS.

■ The terminal can be instructed which mode -WUS is for through a 1-bit delimiter.

■ Alternatively, a terminal in idle/inactive mode can use separate frequency resources set/allocated for LP-WUS, or use the same frequency resources as SSB. A terminal in connected mode can be set frequency resources for LP-WUS within the active BWP of the UE. This allows for distinguishing which mode LP-WUS is for.

■ Alternatively, the mode for which the LP-WUS is intended can be distinguished through the time position (or LP-WUS opportunity) at which the LP-WUS is transmitted/received. That is, the mode for which the LP-WUS is intended can be distinguished by setting different LOs.

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.

A-IoT (Ambient Internet of Things)

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.

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.

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).

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.

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.

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.

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.

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.

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 applied (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).

Implementation example

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

Referring to FIG. 6, a signal transmission and reception method according to an embodiment of the present invention may be performed by a terminal, and may include a step of setting a first resource and a second resource (S501), and a step of performing or omitting reception of a first signal on the first resource and a second signal on the second resource (S503). From a base station perspective, a signal transmission and reception method according to an embodiment of the present invention may include a step of setting a first resource and a second resource (S501), and a step of performing or omitting transmission of a first signal on the first resource and a second signal on the second resource (S503).

Even if expressed by a different name (e.g., first signal, second signal), if the signal is a signal for triggering the operation of another receiver based on its reception by a specific receiver or a signal received by an A-IoT device, it may correspond to LP-WUS in the present specification. In addition, even if expressed by a different name, if the signal is a signal for synchronizing LP-WUS, it may correspond to LP-SS in the present specification.

The first receiver corresponds to a separate receiver (e.g., LP-WUR) for receiving LP-WUS, and the second receiver corresponds to a primary receiver (e.g., 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.

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

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

For example, when a first signal (LP-WUS and/or LP-SS) and a second signal (NR signal/channel) overlap by at least one symbol in the time domain, the terminal/base station may operate based on Method #1. Specifically, when the first resource of FIG. 6 corresponds to a resource for transmitting and receiving an LP-WUS and/or LP-SS associated with a first receiver, and the second resource corresponds to a resource for an NR signal/channel associated with a second receiver, if the SCSs between the respective signals set in the two resources are different, reception of the LP-WUS and/or LP-SS set in the first resource is omitted, and the NR signal/channel set in the second resource is received. On the other hand, if the SCSs between the respective signals set in the two resources are the same, reception of the LP-WUS and/or LP-SS set in the first resource is performed, and the NR signal/channel set in the second resource is also received. The NR signal/channel set in the second resource is a signal that is set independently for LP-WUS (not a signal triggered based on LP-WUS), and the NR signal/channel triggered by LP-WUS can be omitted together when reception of LP-WUS and/or LP-SS is omitted.

Whether transmission and reception of LP-WUS and/or LP-SS are omitted is determined based on whether the two resources overlap, regardless of whether an NR signal/channel is actually transmitted or received. Even if LP-WUS and/or LP-SS are omitted, the terminal can transmit and receive existing signals by operating the second receiver. However, if existing signals (e.g., SSB, system information, control channel, data channel, etc.) are not received due to LP-WUS and/or LP-SS, a major problem occurs compared to LP-WUS and/or LP-SS. Therefore, when multiplexing of the two signals is difficult due to the difference in SCS, it may be preferable to omit LP-WUS and/or LP-SS rather than NR signals/channels.

In this specification, an NR signal/channel may be expressed as a 'signal associated with a second receiver' or an 'OFDM symbol-based signal'. Specifically, the 'signal associated with a second receiver' or an 'OFDM symbol-based signal' may include a 'CP-OFDM-based signal' or a 'DFT-s-OFDM-based signal'.

Additionally, when transmission/reception of LP-SS and/or LP-WUS is set to be periodic (when the first resource is a periodic resource), if transmission/reception of LP-WUS and/or LP-SS is omitted in the first resource, the omitted LP-WUS and/or LP-SS can be scheduled/received through an aperiodic resource to which SCS applied to an NR signal/channel is applied.

Based on the reception of the LP-WUS, the terminal may perform additional specific actions. The specific actions may be actions in which the terminal triggers a second receiver. Alternatively, if the terminal is an A-IoT device, the terminal may transmit a response signal based on the signal.

The action of triggering the second receiver may be expressed as an action of waking up the second receiver, or may be simply expressed as operating the second receiver.

When the second receiver is triggered, an active BWP for the second receiver may be determined based on method #3. The active BWP may include a downlink BWP and/or an uplink BWP. As a specific example, the active BWP to be used after the second receiver is triggered may be set to an initial BWP or a default BWP. Additionally, the active BWP to be used after the second receiver is triggered may be preset via a higher layer parameter. Additionally, the active BWP to be used after the second receiver is triggered may be the BWP that was last activated before the second receiver stopped operating.

If the first and second resources overlap in the frequency domain, the base station/terminal can operate based on method #2.

The frequency range of LP-WUS and/or LP-SS can be set to 11 RB or 12 RB. When set to 11 RB, the base station/terminal can operate based on method #4, and when set to 12 RB, the base station/terminal can operate based on method #5.

When LP-WUS and/or LP-SS are repeatedly transmitted, the base station/terminal can operate based on method #6.

Examples of communication systems to which the present invention is applied

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.

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.

Figure 7 illustrates a communication system (1) applied to the present invention.

Referring to FIG. 7, 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.

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).

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 base station-to-base station communication (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.

Examples of wireless devices to which the present invention is applied

Figure 8 illustrates a wireless device applicable to the present invention.

Referring to FIG. 8, 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. 7.

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.

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.

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.

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.

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.

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) may 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 processed user data, control information, wireless signals/channels, etc. from baseband signals to RF band signals using one or more processors (102, 202). For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and/or a filter.

Examples of wireless devices to which the present invention is applied

Figure 9 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 7).

Referring to FIG. 9, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 8 and may be composed of various elements, components, units/units, and/or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional elements (140). The communication unit may include a communication circuit (112) and a transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and/or one or more memories (104, 204) of FIG. 8. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and/or one or more antennas (108, 208) of FIG. 8. 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).

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. 7, 100a), a vehicle (Fig. 7, 100b-1, 100b-2), an XR device (Fig. 7, 100c), a portable device (Fig. 7, 100d), a home appliance (Fig. 7, 100e), an IoT device (Fig. 7, 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. 7, 400), a base station (Fig. 7, 200), a network node, etc. Wireless devices may be mobile or stationary depending on the use/service.

In FIG. 9, various elements, components, units/parts, and/or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least some may be wirelessly connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be wired, and the control unit (120) and a first unit (e.g., 130, 140) may be wirelessly connected via the communication unit (110). In addition, each element, component, unit/part, and/or module within the wireless device (100, 200) may further include one or more elements. For example, the control unit (120) may be composed of a set of one or more processors. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory, and/or a combination thereof.

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

Figure 10 illustrates a vehicle or autonomous vehicle applicable to the present invention. The vehicle or autonomous vehicle may be implemented as a mobile robot, car, train, manned/unmanned aerial vehicle (AV), ship, etc.

Referring to FIG. 10, 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. 9, respectively.

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.

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.

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.

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

Claims (18)

In a method performed by a terminal in a wireless communication system, A step of setting a first resource for a first signal associated with a first receiver of the terminal; A step of setting a second resource for a second signal associated with a second receiver of the terminal; A step of omitting reception of the first signal in the first resource and receiving the second signal in the second resource based on (ii) that the first resource and the second resource overlap and (ii) a first SCS (SubCarrier Spacing) for the first signal and a second SCS for the second signal are different from each other; and A step of receiving the first signal from the first resource and the second signal from the second resource based on (ii) that the first SCS and the second SCS are the same; comprising; The first signal is LP-WUS (Low Power-Wake Up Signal) or LP-SS (Low Power-Synchronization Signal). method. In the first paragraph, The second signal is a signal based on OFDM (Orthogonal Frequency Division Multiplexing) symbols. method. In the first paragraph, The first resource and the second resource have at least one symbol overlapping in the time domain, method. In the first paragraph, Wherein the first resource is a periodic resource and (ii) transmission of the LP-WUS or the LP-SS is omitted in the first resource, the LP-WUS or the LP-SS is received via an aperiodic resource in which the second SCS is used. method. In the first paragraph, Further comprising a step of operating the second receiver based on the reception of the LP-WUS; The active BWP (BandWidth Part) for the second receiver is set to the initial BWP or default BWP. method. In the first paragraph, Further comprising a step of operating the second receiver based on the reception of the LP-WUS; The active BWP (BandWidth Part) for the second receiver is preset via upper layer parameters. method. In the first paragraph, Further comprising a step of operating the second receiver based on the reception of the LP-WUS; The active BWP (BandWidth Part) for the second receiver is set to the last activated BWP before the second receiver was stopped from operating. method. 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 setting a first resource for a first signal associated with a first receiver of the terminal; A step of setting a second resource for a second signal associated with a second receiver of the terminal; A step of omitting reception of the first signal in the first resource and receiving the second signal in the second resource based on (ii) that the first resource and the second resource overlap and (ii) a first SCS (SubCarrier Spacing) for the first signal and a second SCS for the second signal are different from each other; and A step of receiving the first signal from the first resource and the second signal from the second resource based on (ii) that the first SCS and the second SCS are the same; comprising; The first signal is LP-WUS (Low Power-Wake Up Signal) or LP-SS (Low Power-Synchronization Signal). Terminal. In paragraph 8, The second signal is a signal based on OFDM (Orthogonal Frequency Division Multiplexing) symbols. Terminal. In paragraph 8, The first resource and the second resource have at least one symbol overlapping in the time domain, Terminal. In paragraph 8, Wherein the first resource is a periodic resource and (ii) transmission of the LP-WUS or the LP-SS is omitted in the first resource, the LP-WUS or the LP-SS is received via an aperiodic resource in which the second SCS is used. Terminal. In paragraph 8, Further comprising a step of operating the second receiver based on the reception of the LP-WUS; The active BWP (BandWidth Part) for the second receiver is set to the initial BWP or default BWP. Terminal. In paragraph 8, Further comprising a step of operating the second receiver based on the reception of the LP-WUS; The active BWP (BandWidth Part) for the second receiver is preset via upper layer parameters. Terminal. In paragraph 8, Further comprising a step of operating the second receiver based on the reception of the LP-WUS; The active BWP (BandWidth Part) for the second receiver is set to the last activated BWP before the second receiver was stopped from operating. Terminal. 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 setting a first resource for a first signal associated with a first receiver of the terminal; A step of setting a second resource for a second signal associated with a second receiver of the terminal; A step of omitting reception of the first signal in the first resource and receiving the second signal in the second resource based on (ii) that the first resource and the second resource overlap and (ii) a first SCS (SubCarrier Spacing) for the first signal and a second SCS for the second signal are different from each other; and A step of receiving the first signal from the first resource and the second signal from the second resource based on (ii) that the first SCS and the second SCS are the same; comprising; The first signal is LP-WUS (Low Power-Wake Up Signal) or LP-SS (Low Power-Synchronization Signal). Device. 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 setting a first resource for a first signal associated with a first receiver of the terminal; A step of setting a second resource for a second signal associated with a second receiver of the terminal; A step of omitting reception of the first signal in the first resource and receiving the second signal in the second resource based on (ii) that the first resource and the second resource overlap and (ii) a first SCS (SubCarrier Spacing) for the first signal and a second SCS for the second signal are different from each other; and A step of receiving the first signal from the first resource and the second signal from the second resource based on (ii) that the first SCS and the second SCS are the same; comprising; The first signal is LP-WUS (Low Power-Wake Up Signal) or LP-SS (Low Power-Synchronization Signal). Storage media. In a method performed by a base station in a wireless communication system, A step of setting a first resource for a first signal associated with a first receiver of a terminal; A step of setting a second resource for a second signal associated with a second receiver of the terminal; A step of omitting transmission of the first signal in the first resource and transmitting the second signal in the second resource based on (ii) that the first resource and the second resource overlap and (iii) a first SCS (SubCarrier Spacing) for the first signal and a second SCS for the second signal are different from each other; and A step of transmitting the first signal from the first resource and the second signal from the second resource based on (ii) that the first SCS and the second SCS are the same; comprising; The first signal is LP-WUS (Low Power-Wake Up Signal) or LP-SS (Low Power-Synchronization Signal). method. 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 a first resource for a first signal associated with a first receiver of a terminal; A step of setting a second resource for a second signal associated with a second receiver of the terminal; A step of omitting transmission of the first signal in the first resource and transmitting the second signal in the second resource based on (ii) that the first resource and the second resource overlap and (iii) a first SCS (SubCarrier Spacing) for the first signal and a second SCS for the second signal are different from each other; and A step of transmitting the first signal from the first resource and the second signal from the second resource based on (ii) that the first SCS and the second SCS are the same; comprising; The first signal is LP-WUS (Low Power-Wake Up Signal) or LP-SS (Low Power-Synchronization Signal). Base station.