Terminal, base station, and communication method

Abstract

A terminal is provided with: a control unit that assumes that at least one of a low-power wake-up signal used in a first radio access technology and a synchronization signal of the low-power wake-up signal is transmitted from a base station by a second radio access technology; and a reception unit that receives, from the base station, the low-power wake-up signal transmitted by the second radio access technology and / or a synchronization signal for the low-power wake-up signal.

Description

Technical Field

[0001] This invention relates to terminals, base stations, and communication methods in wireless communication systems. Background Technology

[0002] Within the 3GPP (3rd Generation Partnership Project), research was conducted on wireless communication methods known as 5G or NR (New Radio) to further increase system capacity, improve data transmission speed, and reduce latency in the radio space. In 5G, to meet the requirements of achieving throughput of over 10Gbps and achieving latency of less than 1ms in the radio space, various wireless technologies and network architectures were researched (e.g., non-patent literature 1 and non-patent literature 2).

[0003] Existing technical documents

[0004] Non-patent literature

[0005] Non-patent document 1: 3GPP TS 38.300 V17.3.0 (2022-12)

[0006] Non-patent document 2: 3GPP TS 38.401 V17.3.0 (2022-12) Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] In 3GPP Rel-18, with the aim of further reducing the power consumption of the previous WUS (Wake Up Signal), an ultra-low power approach called LP (Low Power)-WUS / WUR (Wake Up Receiver) was investigated. In LP-WUS / WUR, the goal is to use a receiver structure with the lowest possible power consumption.

[0009] However, it is difficult to achieve sufficient coverage when using a low-power receiver.

[0010] The present invention was made in view of the above-mentioned problems, and its object is to improve the coverage characteristics of low power wake-up signal (LP-WUS) in wireless communication systems.

[0011] Methods for solving problems

[0012] According to the disclosed technology, a terminal is provided, comprising: a control unit that envisions at least one of a low-power wake-up signal used in a first wireless access technology and a synchronization signal of the low-power wake-up signal being transmitted from a base station via a second wireless access technology; and a receiving unit that receives from the base station at least one of the low-power wake-up signal and the synchronization signal of the low-power wake-up signal being transmitted via the second wireless access technology.

[0013] The effects of the invention

[0014] According to the disclosed technology, the coverage characteristics of low-power wake-up signals (LP-WUS) can be improved in wireless communication systems. Attached Figure Description

[0015] Figure 1 This is a diagram used to illustrate the wireless communication system in an embodiment of the present invention.

[0016] Figure 2 This is a diagram used to illustrate the wireless communication system in an embodiment of the present invention.

[0017] Figure 3 This is a diagram illustrating the communication based on LP-WUS and LP-WUR in embodiments of the present invention.

[0018] Figure 4 This is a diagram illustrating the communication based on LP-WUS and LP-WUR in embodiments of the present invention.

[0019] Figure 5 This is a diagram illustrating the LP-WUS transmission method in an embodiment of the present invention.

[0020] Figure 6 This is a diagram illustrating the LP-WUS transmission method in an embodiment of the present invention.

[0021] Figure 7 This is a diagram in LP-WUS format used to illustrate embodiments of the present invention.

[0022] Figure 8 This is the first example diagram used to illustrate the coverage structure of LP-WUS.

[0023] Figure 9 This is the second example diagram used to illustrate the coverage structure of LP-WUS.

[0024] Figure 10 This is a diagram illustrating a first example of the coverage structure of LP-WUS in an embodiment of the present invention.

[0025] Figure 11This is a second example of the coverage structure of LP-WUS in an embodiment of the present invention.

[0026] Figure 12 This is a diagram illustrating the third example of the coverage structure of LP-WUS in an embodiment of the present invention.

[0027] Figure 13 This is a fourth example of the coverage structure of LP-WUS in an embodiment of the present invention.

[0028] Figure 14 This is a diagram illustrating the fifth example of the coverage structure of LP-WUS in an embodiment of the present invention.

[0029] Figure 15 This is a diagram illustrating the sixth example of the coverage structure of LP-WUS in an embodiment of the present invention.

[0030] Figure 16 This is a diagram illustrating the seventh example of the coverage structure of LP-WUS in an embodiment of the present invention.

[0031] Figure 17 This is a diagram illustrating an example of the functional structure of base station 10 in an embodiment of the present invention.

[0032] Figure 18 This is a diagram illustrating an example of the functional structure of terminal 20 in an embodiment of the present invention.

[0033] Figure 19 This is a diagram illustrating an example of the hardware structure of a base station 10 or a terminal 20 in an embodiment of the present invention.

[0034] Figure 20 This is a diagram illustrating an example of the structure of a vehicle 2001 according to an embodiment of the present invention. Detailed Implementation

[0035] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, the embodiments described below are merely examples, and the application of the present invention is not limited to the embodiments described below.

[0036] In the operation of the wireless communication system according to embodiments of the present invention, existing technologies are appropriately used. These existing technologies include, for example, existing LTE, but are not limited to, existing LTE. Furthermore, unless otherwise stated, the term "LTE" as used in this specification has a broad meaning that includes LTE-Advanced and subsequent methods (e.g., NR).

[0037] Furthermore, in the embodiments of the present invention described below, the terms SS (Synchronization Signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel) used in conventional LTE are used. These are for ease of description, and the same signals and functions can also be referred to by other names. In NR, the above terms are not specifically distinguished from those in LTE and are referred to as SS, PSS, SSS, PBCH, PRACH, etc.

[0038] Furthermore, in embodiments of the present invention, the duplex mode can be TDD (Time Division Duplex), FDD (Frequency Division Duplex), or other modes (e.g., Flexible Duplex).

[0039] Furthermore, in embodiments of the present invention, the “configure” wireless parameters can be pre-configured predetermined values ​​or wireless parameters notified from the base station 10 or the terminal 20.

[0040] Figure 1 This is a diagram illustrating an example structure of a wireless communication system according to an embodiment of the present invention. For example... Figure 1 As shown, the wireless communication system in this embodiment of the invention includes a base station 10 and a terminal 20. Figure 1 The image shows one base station 10 and one terminal 20, but this is just one example; there can be multiple terminals.

[0041] Base station 10 is a communication device that provides one or more cells and wirelessly communicates with terminal 20. The physical resources of the wireless signal are defined in the time and frequency domains. The time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or resource blocks. Base station 10 sends synchronization signals and system information to terminal 20. Synchronization signals are, for example, PSS and SSS. System information is transmitted, for example, via PBCH, also known as broadcast information. Synchronization signals and system information can also be referred to as SSB (SS / PBCH block). Figure 1 As shown, base station 10 sends control signals or data to terminal 20 via DL (Downlink) and receives control signals or data from terminal 20 via UL (Uplink). Both base station 10 and terminal 20 are capable of beamforming for signal transmission and reception. Furthermore, both base station 10 and terminal 20 can apply MIMO (Multiple Input Multiple Output) based communication to DL or UL. Additionally, base station 10 and terminal 20 can also communicate via CA (Carrier Aggregation) based secondary cells (SCell) and primary cells (PCell). Moreover, terminal 20 can also communicate via DC (Dual Connectivity) based primary cells of base station 10 and primary SCG cells of other base stations 10.

[0042] Terminal 20 is a communication device with wireless communication capabilities, such as a smartphone, mobile phone, tablet computer, wearable terminal, or M2M (Machine-to-Machine) communication module. Figure 1 As shown, terminal 20 receives control signals or data from base station 10 via DL and transmits control signals or data to base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Furthermore, terminal 20 receives various reference signals transmitted from base station 10 and performs propagation path quality measurements based on the reception results of these reference signals.

[0043] Figure 2 This is a diagram used to illustrate the wireless communication system in an embodiment of the present invention. Figure 2 This illustrates an example of the structure of a wireless communication system implementing DC (Dualconnectivity). For example... Figure 2As shown, the system includes a base station 10A acting as the Master Node (MN) and a base station 10B acting as the Secondary Node (SN). Base stations 10A and 10B are connected to the core network. Terminal 20 can communicate with both base stations 10A and 10B.

[0044] The cell group provided by base station 10A, which acts as the MN, is called the MCG (Master Cell Group), and the cell group provided by base station 10B, which acts as the SN, is called the SCG (Secondary Cell Group). Furthermore, in the DC, the MCG consists of one PCell and one or more SCells, and the SCG consists of one PSCell (Primary SCG Cell) and one or more SCells.

[0045] The processing action in this embodiment can be achieved through... Figure 1 The system architecture shown can be used to execute this, or it can be done through... Figure 2 The system architecture shown can be used for execution, but it can also be used through other system architectures. Additionally, in the following explanation, " / " means "and / or" unless otherwise specified and unless the meaning is clearly different depending on the context.

[0046] Figure 3 This diagram illustrates communication based on LP-WUS and LP-WUR in embodiments of the present invention. In 3GPP (registered trademark) Rel-18, a power-reduction technique known as "Low-Power Wake-Up Signal and Receiver" is being discussed. The Low-Power Wake-Up Signal is referred to as LP-WUS or simply WUS, and the Low-Power Wake-Up Receiver is referred to as LP-WUR, WUR, or LR. Figure 3 As shown in (a), a simpler circuit, LR, operates with lower power consumption than MR, as an alternative to the Main Radio (MR) used in normal data communication, thereby introducing a state known as Ultra-Deep Sleep. Figure 3 As shown in (b), LR can have the following functions: Figure 3 As shown in (a), the LR receiving the LP-WUS signal can trigger the MR to disconnect or connect its power supply.

[0047] Figure 4This diagram illustrates communication based on LP-WUS and LP-WUR in embodiments of the present invention. Within 3GPP, detailed discussions are underway regarding the functions the LR should possess, including: what functional extensions should be made for states such as RRC IDLE and RRC CONNECTED; whether functions other than monitoring LP-WUS and waking up the MR are needed; and which functions the LR should replace in the MR during deep sleep (e.g., the RRM in the RRC IDLE state). Potential candidates for these functions include... Figure 4 As shown, the study investigated the transmission of an LP-WUS containing information indicating whether a PO should be monitored, and the subsequent monitoring process of the LR receiving the LP-WUS, initiating the MR, and continuing the monitoring of the PO. Alternatively, after the MR is initiated, as an action towards RRC IDLE, the RACH process such as PRACH transmission can continue, or as an action towards RRC CONNECTED, the monitoring action of PDCCH can continue, etc.

[0048] Furthermore, 3GPP discussed the suitability of LP-WUS / WUR for various types of equipment and the need to meet low latency requirements.

[0049] (First Embodiment)

[0050] The first embodiment will be described. Figure 5 This is a diagram illustrating the LP-WUS transmission method in an embodiment of the present invention. Figure 5 In this configuration, base station 10 sets configuration information containing information about the range of resources capable of transmitting LP-WUS, and based on this configuration information, transmits LP-WUS to terminal 20 at necessary intervals within the configured resource range. Terminal 20, based on the configuration information received from base station 10 containing information about the range of resources capable of transmitting LP-WUS, sets resources for receiving LP-WUS, and receives LP-WUS transmitted from base station 10. Alternatively, the range of resources capable of transmitting LP-WUS may not be set by the base station to the terminal, but rather the range of resources that the terminal requests from the base station to receive; a unique range or multiple candidates may also be specified in the standard specification. Figure 5 The LP-WUS sent in the middle is, for example, an explicit or implicit signal indicating an indication related to the power-on or power-off triggering of the MR.

[0051] Furthermore, the LP-WUS may include information related to a terminal identifier (UE_ID) representing the indicated target terminal 20 or a terminal group identifier (UE_group_ID) representing the group of indicated target terminals 20. The LP-WUS may specify multiple UE_IDs or multiple UE_group_IDs. Moreover, LP-WUS multiplexed from a single LP-WUS can be generated and transmitted using Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), and Code Division Multiplexing (CDM), etc. The characteristics related to the indication objects and multiplexing of these LP-WUS can also be applied to all embodiments shown below.

[0052] Figure 6 This is a diagram illustrating the LP-WUS transmission method in an embodiment of the present invention. Figure 6 In this configuration, base station 10 sets configuration information containing information about opportunities to send LP-WUS (LP-WUS occasions), and based on this configuration information, sends LP-WUS to terminal 20 at necessary time intervals within the set resource range. For example, LP-WUS occasions have a certain time period. Terminal 20, based on the configuration information containing information received from base station 10 about opportunities to send LP-WUS, sets resources for receiving LP-WUS, etc., and thus receives LP-WUS sent from base station 10. Figure 6 In addition to the LP-WUS (on) instruction to wake up the MR (power on), it is also possible to send an LP-WUS (off) instruction to prevent the MR from waking up (power off). LP-WUS (off) can also be an instruction to continue power off. Here, as... Figure 6 As shown in (a), base station 10 can transmit LP-WUS (LP-WUS (on) or LP-WUS (off)) during all opportunities to transmit LP-WUS. Alternatively, as another transmission method, such as Figure 6 As shown in (b), base station 10 may also transmit LP-WUS only when necessary during opportunities to transmit LP-WUS. Figure 6 In (b), base station 10 transmits LP-WUS (connected) as shown by the solid quadrilateral, but does not transmit LP-WUS (disconnected) as shown by the dashed quadrilateral.

[0053] Figure 7 This is a diagram illustrating the LP-WUS format in the embodiments of the present invention. Figure 7 Five formats of LP-WUS, including a preamble and a payload, are shown. In this embodiment, one format or multiple formats may be used. The preamble is a signal used by the terminal 20 to detect LP-WUS. The payload includes, for example, the aforementioned information indicating MR wake-up (power on), information indicating not to wake up MR (power off), information related to the terminal identifier (UE_ID) indicating the target terminal 20, and information related to the terminal group identifier (UE_group_ID) indicating the group of the target terminal 20. Each format will be described below.

[0054] In format 1, the preamble and payload are sent upon request. The request can occur when base station 10 requests MR wake-up, or when LP-WUS is sent intermittently at other times. The same applies to subsequent formats.

[0055] In the second format, the preamble is sent periodically, and the payload is sent upon request.

[0056] In the third format, after the periodically sent preamble, another preamble and payload are sent upon request.

[0057] In format 4, the periodically transmitted preamble and the payload sent upon request are transmitted as separate signals. The preamble, as a separate signal, can also be considered as an LP-SS (Low Power-Synchronization Signal) or a low-power synchronization signal, etc.

[0058] In format 5, the preamble and payload are sent periodically.

[0059] In format 6, only the payload is transmitted. For example, if synchronization has been achieved using synchronization signals such as NR or SSB, the preamble is not transmitted; only the payload is transmitted.

[0060] (The structure of LP-WUR)

[0061] As a detector architecture for LP-WUR, it can utilize radio frequency (RF) envelope detection, heterodyne architecture with intermediate frequency (IF) envelope detection, homodyne / zero-IF architecture with baseband envelope detection, frequency shift keying (FSK) receiver, and orthogonal frequency division multiple access (OFDMA) based signals / channels detection, etc.

[0062] Here, the LP-WUR is preferably a structure with the lowest possible power consumption. However, when using a low-power receiver (e.g., radio frequency envelope detection), it is difficult to achieve the same coverage as existing networks (e.g., 5G) due to the poor sensitivity characteristics of the receiver.

[0063] (Existing methods for extending coverage)

[0064] Existing methods for extending coverage to compensate for receiver sensitivity include increasing transmission power, reducing data rate (reducing the amount of LP-WUS information transmitted), expanding resources for transmission (e.g., expanding the bandwidth and number of symbols of LP-WUS), repeated transmission of LP-WUS, and beamforming.

[0065] However, expanding the existing coverage of LP-WUS applications is expected to present several problems. For example, due to the limitation on the maximum transmit power of LP-WUS, any increase in transmit power is constrained by factors such as the bandwidth occupied by LP-WUS and multiplexing with other NR signals / channels.

[0066] Furthermore, regarding data rate reduction, decreasing the information content of LP-WUS does not necessarily translate to reduced power consumption. For example, by increasing the information content of LP-WUS, it is possible to send individual wake-up instructions to the target terminal, preventing unnecessary wake-ups to terminals outside the target, thereby reducing power consumption. Thus, in LP-WUS designs that consider various use cases, it is difficult to achieve the effect of expanded coverage simply by reducing the data rate.

[0067] Furthermore, the expansion of resources used for transmission, repeated transmission of LP-WUS, and beamforming lead to increased overhead and receiver complexity, as well as increased receiver power consumption and processing latency.

[0068] (Example)

[0069] An example will be described. In this example, a method for improving the coverage characteristics of a low-power wake-up signal (LP-WUS) in a wireless communication system will be described.

[0070] In this embodiment, as an alternative to the terminal 20 migrating to a state where it can only perform limited actions (such as a sleep state like a deep sleep state) and is unable to perform specific actions, a low-power wake-up signal is used, which has some or all of the function of reducing the power consumption and latency of the terminal 20 by resuming from this state through a wake-up indication from the base station 10. Here, the low-power wake-up signal can be simply referred to as the wake-up signal.

[0071] In addition, the wake-up signal can consist of a signal that gives a wake-up instruction to the terminal 20 (e.g., LP-WUS), a signal that synchronizes time and / or frequency, or a signal that provides actions such as cell quality measurement (e.g., LP-SS), or it can be a single signal that has the functions of both parties.

[0072] Among the aforementioned functions for reducing power consumption and latency, terminal 20 can also receive all or part of LP-WUS and LP-SS from other cells (secondary cells, etc.) that use different Radio Access Technology (RAT) and / or frequencies than this cell (the cell of base station 10 connected to terminal 20).

[0073] Alternatively, terminal 20 may also combine the detection actions of LP-WUS and LP-SS received in the local cell with additional LP-WUS and LP-SS received in other cells. In this case, base stations 10 in other cells may also use different radio access technologies and / or frequencies to transmit all or part of the additional LP-WUS and LP-SS.

[0074] Figure 8 This is the first example diagram used to illustrate the coverage structure of LP-WUS. (See diagram below.) Figure 8As shown, the currently envisioned LP-WUS coverage may not be able to determine neighboring cells due to the narrow coverage and poor coverage characteristics of 6G cells. Here, the coverage range of LP-WUS refers to the range that can receive LP-WUS signals, while the coverage range of 6G cells refers to the range that can receive typical 6G signals (excluding low-power signals such as LP-WUS).

[0075] Figure 9 This is the second example diagram used to illustrate the coverage structure of LP-WUS. (See diagram below.) Figure 9 As shown, it is preferable to apply the aforementioned existing coverage extension to LP-WUS so that the coverage of LP-WUS is equivalent to the coverage of 6G cells (the typical signal coverage). However, when applying the existing coverage extension to LP-WUS, the aforementioned problems need to be considered.

[0076] (Example 1)

[0077] Example 1 will be described. In Example 1, terminal 20 can be envisioned being transmitted by base station 10 using a low-frequency radio access technology (RAT) such as 4G and / or 5G, which has better coverage characteristics than 6G, which is a high-frequency band, to transmit 6G LP-WUS (or LP-WUS and LP-SS). Here, when LP-WUS is defined as a signal for paging notification in the IDLE or INACTIVE state, by notifying paging in the 6G cell in 4G and / or 5G, the narrow coverage of LP-WUS can be extended to full coverage (coverage equivalent to that of a normal signal).

[0078] Figure 10 This is a diagram illustrating a first example of the coverage structure of LP-WUS in an embodiment of the present invention. Figure 10 In the text, the coverage areas of 6G and 4G / 5G cells are described separately without repetition, but in reality, they are located at the same position centered on base station 10a. For example... Figure 10As shown, terminals 20 (20a, 20b) use 4G and / or 5G RATs to receive 6G LP-WUS and LP-SS from base station 10a. Base station 10a, using 4G and / or 5G RATs and 6G RATs, can also be two different base stations 10 (10c, 10d, etc.). This description also applies to the following figures. Furthermore, it is possible to transmit only LP-WUS instead of both LP-WUS and LP-SS. Here, the cell coverage area of ​​LP-WUS in 4G and / or 5G, which is a frequency band lower than 6G, is equivalent to the cell coverage area of ​​6G (the range capable of receiving typical 6G signals). That is, not only terminals 20a near the cell center but also terminals 20b near the cell edge can receive wake-up signals, thus improving coverage characteristics.

[0079] (Example 2)

[0080] Example 2 will be described. In Example 2, terminal 20 may be assumed to be transmitted by base station 10 using 6G RAT to transmit 6G LP-WUS (or LP-WUS and LP-SS), and 6G LP-WUS (or LP-WUS and LP-SS) may be transmitted by base station 10 using 4G and / or 5G RAT as an auxiliary means.

[0081] Figure 11 This is a diagram illustrating a second example of the coverage structure of LP-WUS in an embodiment of the present invention. (See diagram for example.) Figure 11 As shown, terminals 20 (20a, 20b) receive 6G LP-WUS and LP-SS from base station 10a using a 6G RAT, and supplementarily receive 6G LP-WUS and LP-SS from base station 10a using a 4G and / or 5G RAT. Alternatively, they may not transmit both LP-WUS and LP-SS, but only LP-WUS. Here, the cell coverage of LP-WUS in 4G and / or 5G, which is a frequency band lower than 6G, is equivalent to the cell coverage of 6G (the range capable of receiving typical 6G signals). That is, not only terminal 20a near the cell center, but also terminal 20b near the cell edge can receive the wake-up signal, thus improving coverage characteristics.

[0082] (Example 3)

[0083] Example 3 will be described. In Example 3, terminal 20 can be envisioned being transmitted by base station 10 using the RAT of any first network (4G, 5G, and 6G, etc.) to LP-WUS (or LP-WUS and LP-SS) of any second network (4G, 5G, and 6G, etc.). Here, the combination of the first network and the second network can be arbitrary.

[0084] Figure 12 This is a diagram illustrating the third example of the coverage structure of LP-WUS in an embodiment of the present invention. As an example of a combination, such as... Figure 12 As shown, terminals 20 (20a, 20b) use 4G RAT to receive 5G LP-WUS and LP-SS from base station 10a. Alternatively, they may not transmit both LP-WUS and LP-SS, but only LP-WUS. Here, the cell coverage range of LP-WUS in 4G, which is a lower frequency band than 5G, is the same as the cell coverage range of 5G (the range capable of receiving typical 5G signals). That is, not only terminal 20a near the cell center, but also terminal 20b near the cell edge can receive the wake-up signal, thus improving coverage characteristics.

[0085] (Example 4)

[0086] Example 4 will be described. In Example 4, terminal 20 may also be conceived to be transmitted by base station 10 using a frequency band different from the frequency band for receiving normal signals (signals other than wake-up signals) to transmit LP-WUS (or LP-WUS and LP-SS).

[0087] Figure 13 This is a diagram illustrating the fourth example of the coverage structure of LP-WUS in an embodiment of the present invention. (See diagram for example.) Figure 13 As shown, terminals 20 (20a, 20b) use a frequency band (700MHz) different from the frequency band for receiving normal signals (2GHz) to receive 5G LP-WUS and LP-SS from base station 10a. Alternatively, they can transmit only LP-WUS without transmitting both LP-WUS and LP-SS. Here, the cell coverage range of LP-WUS in the 700MHz frequency band is the same as the cell coverage range (the range capable of receiving normal signals) of the 2GHz frequency band. That is, not only terminal 20a near the cell center, but also terminal 20b near the cell edge can receive the wake-up signal, thus improving coverage characteristics.

[0088] (Example 5)

[0089] Example 5 will be described. In Example 5, terminal 20 may be assumed to have a portion of the signal constituting a wake-up signal transmitted by base station 10 using 6G RAT, and the remaining portion of the signal constituting a wake-up signal transmitted by base station 10 using 4G and / or 5G RAT.

[0090] For example, a portion of the wake-up signal may be the wake-up signal synchronization signal (LP-SS) and / or a portion of the content (LP-WUS), while the remaining portion of the wake-up signal may be a signal containing (remaining) content related to the wake-up signal (LP-WUS).

[0091] In addition, as a substitute for the synchronization signal (LP-SS), which is part of the wake-up signal, other synchronization signals (NR SSB, etc.), reference signals (de-modulation reference signal (DMRS), channel state information reference signal (CSI (Channel State Information-RS))) can also be used.

[0092] Figure 14 This is a diagram illustrating the fifth example of the coverage structure of LP-WUS in an embodiment of the present invention. (See diagram below.) Figure 14 As shown, terminal 20a near the center of the cell receives LP-WUS transmitted by base station 10a using 4G and / or 5G RAT, and receives LP-SS transmitted by base station 10a using 6G RAT. Alternatively, terminal 20a near the center of the cell may also receive LP-WUS and LP-SS transmitted by base station 10a using 6G RAT. Furthermore, terminal 20b at the cell edge receives LP-WUS transmitted by base station 10a using 4G and / or 5G RAT, and receives other synchronization signals transmitted by base station 10a using 6G RAT as a substitute for the synchronization signal (LP-SS). This improves coverage characteristics.

[0093] Furthermore, terminal 20 can also perform synchronization operations and / or cell quality measurements using at least one of the following: a synchronization signal based on a low-power wake-up signal (LP-SS) and other synchronization signals (NR SSB, 6G synchronization signals, etc.). Here, terminal 20 can select the synchronization signal, synchronization method, and cell quality measurement method to be used. Alternatively, terminal 20 can notify base station 10 of its terminal capabilities related to the synchronization signal, synchronization method, and cell quality measurement method to be used. Furthermore, base station 10 can also determine the synchronization signal, synchronization method, and cell quality measurement method to be used based on the terminal capabilities received from terminal 20, and notify terminal 20 of the determination via RRC, DCI, and MAC CE, etc. Additionally, cell quality measurements can be, for example, measurements of Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ).

[0094] Furthermore, terminal 20 can envision the cell quality measurement result determined based on the synchronization signal, synchronization method, and cell quality measurement method used, and can also send the cell quality measurement result to base station 10.

[0095] (Example 6)

[0096] Example 6 will be described. In Example 6, base station 10 may also apply the existing coverage extension method described above to a portion of the signal constituting the wake-up signal and send that portion of the signal to terminal 20. Alternatively, terminal 20 may also consider sending a portion of the signal constituting the wake-up signal from base station 10 using the existing coverage extension method, and receiving that portion of the signal.

[0097] For example, base station 10 may also apply coverage extension based on repeated transmission to the synchronization signal (LP-SS) of the low-power wake-up signal and send the synchronization signal to terminal 20. Alternatively, terminal 20 may also envision the wake-up signal synchronization signal (LP-SS) being sent from base station 10 using the coverage extension method based on repeated transmission, and terminal 20 receiving the synchronization signal.

[0098] Low-power wake-up signal (LP-WUS) is required to have low latency as an on-demand signal, so coverage extension based on repeated transmission is not preferred. On the other hand, the synchronization signal of low-power wake-up signal (LP-SS) does not require low latency like on-demand signals, so coverage extension based on repeated transmission and high-density transmission cycles is not a problem.

[0099] Figure 15 This is a diagram illustrating the sixth example of the coverage structure of LP-WUS in an embodiment of the present invention. (See diagram for example.) Figure 15 As shown, base station 10a applies existing coverage extension to the synchronization signal (LP-SS) of the low-power wake-up signal and sends this synchronization signal to terminals 20 (20a, 20b) using a 6G RAT. Alternatively, base station 10a does not apply coverage extension but uses a 4G and / or 5G RAT to send the low-power wake-up signal (LP-WUS) to terminals 20 (20a, 20b). Terminal 20b at the cell edge, like terminal 20a at the cell center, is able to receive both the low-power wake-up signal (LP-WUS) and the synchronization signal (LP-SS), thus improving coverage characteristics.

[0100] (Example 7)

[0101] Example 7 will be described. In Example 7, the existing coverage extension described above can also be applied to the synchronization signal (LP-SS) for the low-power wake-up signal in RATs outside of 6G.

[0102] Figure 16 This is the seventh example of a diagram illustrating the coverage structure of LP-WUS in an embodiment of the present invention. (See diagram below.) Figure 16As shown, base station 10a applies coverage extension to the synchronization signal (LP-SS) of the low-power wake-up signal and uses the 5G RAT to send the synchronization signal to terminals 20 (20a, 20b). Alternatively, base station 10a does not apply coverage extension but uses the 4G RAT to send the low-power wake-up signal (LP-WUS) to terminals 20 (20a, 20b). Terminal 20b at the cell edge, like terminal 20a at the cell center, can receive both the low-power wake-up signal (LP-WUS) and the synchronization signal (LP-SS), thus improving coverage characteristics.

[0103] In the above embodiments, in addition to the information required for the LP-WUS and / or WUR operations of the cell, the base station 10 can also notify the terminal 20 of LP-WUS and / or LP-SS information that can be utilized or can be assisted in utilizing via RRC, DCI, and MAC CE. The notified information includes, for example, at least one of the following information related to the LP-WUS and / or LP-SS that can be utilized or can be assisted in utilizing: information on the Radio Access Technology (RAT); information on the payload format; information on the sequence generation method; information on the parameters in the sequence generation method; information on the timing, period, and frequency at the monitoring location containing the opportunity to send LP-WUS; cell information (e.g., frequency, cell identifier (ID), location of synchronization signal (SSB), etc.); information indicating whether only LP-WUS can be utilized; information indicating whether only LP-SS can be utilized; and information indicating whether both LP-WUS and LP-SS can be utilized.

[0104] Additionally, as a terminal capability, terminal 20 may also send at least one of the following information related to LP-WUS and / or LP-SS to base station 10: Radio Access Technology (RAT) information; payload format information; sequence generation method information; parameters in the sequence generation method information; timing, period, and frequency information at a monitoring location containing the opportunity to transmit LP-WUS; cell information (e.g., frequency, cell identifier (ID), location of synchronization signal (SSB), etc.); information indicating whether only LP-WUS can be used; information indicating whether only LP-SS can be used; and information indicating whether both LP-WUS and LP-SS can be used. Base station 10 may also, based on the terminal capability received from terminal 20, determine the LP-WUS and / or LP-SS information that can be used or can be assisted in using, and notify terminal 20 of the determined transmission method via RRC, DCI, and MACCE, etc.

[0105] Through the above implementation methods, the coverage characteristics of low-power wake-up signals (LP-WUS) can be improved in wireless communication systems.

[0106] (Device structure)

[0107] Next, an example of the functional structure of the base station 10 and terminal 20 performing the processes and actions described above will be explained. The base station 10 and terminal 20 include the functions implemented in the above embodiments. However, the base station 10 and terminal 20 may each have only a portion of the functions described in the embodiments.

[0108] <Base Station 10>

[0109] Figure 17 This is a diagram illustrating an example of the functional structure of base station 10 in an embodiment of the present invention. For example... Figure 17 As shown, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130 and a control unit 140. Figure 17 The functional structure shown is only one example. As long as the actions involved in the embodiments of the present invention can be performed, the functional distinctions and names of the functional parts can be arbitrary.

[0110] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and wirelessly transmitting the signal. The transmitting unit 110 transmits setting information, instructions, and notifications related to low-power wake-up signals to the terminal 20. Additionally, the transmitting unit 110 transmits notifications related to switching of monitoring operations to the terminal. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining, for example, higher-level information from the received signals. Furthermore, the transmitting unit 110 has the function of transmitting PSS, SSS, PBCH, DL / UL control signals, etc., to the terminal 20. Furthermore, the receiving unit 120 receives inter-network node messages from other network nodes.

[0111] The setting unit 130 stores preset setting information and various setting information sent to the terminal 20. The content of the setting information includes, for example, setting information related to paging notification information and low-power wake-up signals.

[0112] As described in the embodiment, the control unit 140 performs control over settings, instructions, and notifications related to low-power wake-up signals, etc. Alternatively, the signal transmission-related functions of the control unit 140 may be included in the transmitting unit 110, and the signal reception-related functions of the control unit 140 may be included in the receiving unit 120.

[0113] Terminal 20

[0114] Figure 18 This is a diagram illustrating an example of the functional structure of terminal 20 in an embodiment of the present invention. For example... Figure 18 As shown, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. Figure 18The functional structure shown is only one example. As long as the actions involved in the embodiments of the present invention can be performed, the functional distinctions and names of the functional units can be arbitrary. The transmitting unit 210 and the receiving unit 220 can also be collectively referred to as the communication unit.

[0115] The transmitting unit 210 generates a transmission signal based on the transmission data and transmits the transmission signal wirelessly. The transmitting unit 210 transmits capability information related to the low-power wake-up signal to the base station 10. The receiving unit 220 wirelessly receives various signals and obtains higher-layer signals from the received physical layer signals. Furthermore, the receiving unit 220 has the function of receiving PSS, SSS, PBCH, DL / UL / SL control signals, etc., transmitted from the base station 10. Additionally, the receiving unit 220 receives setting information, instructions, and notifications related to paging notification information and the low-power wake-up signal from the base station 10. For example, the receiving unit 220 receives the low-power wake-up signal from the base station 10. The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10. Furthermore, the setting unit 230 also stores preset setting information. The content of the setting information includes, for example, setting information related to paging notification information and the low-power wake-up signal.

[0116] As described in the embodiment, the control unit 240 performs settings related to the low-power wake-up signal. Alternatively, the signal transmission-related functions of the control unit 240 may be included in the transmitting unit 210, and the signal reception-related functions of the control unit 240 may be included in the receiving unit 220.

[0117] (Hardware structure)

[0118] The block diagram used in the description of the above embodiments ( Figure 17 and Figure 18 The diagram illustrates blocks organized by function. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Furthermore, there are no particular limitations on the implementation method of each functional block. That is, each functional block can be implemented using a single device that is physically or logically combined, or by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. Functional blocks can also be implemented by combining software within the aforementioned single or multiple devices.

[0119] The functions include judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that performs the sending function is called a transmitting unit or transmitter. In short, as mentioned above, there are no particular limitations on the implementation method.

[0120] For example, in one embodiment of this disclosure, the base station 10, terminal 20, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 19 This is a diagram illustrating an example of the hardware structure of a base station 10 and a terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 may also be configured as a computer device that physically includes a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0121] Additionally, in the following description, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware structure of base station 10 and terminal 20 can be configured to include one or more of the devices shown in the figures, or it can be configured to not include any of them.

[0122] The functions of base station 10 and terminal 20 are implemented by reading predetermined software (program) into hardware such as processor 1001 and storage device 1002, so that processor 1001 performs calculations and controls the communication of communication device 1004 or controls at least one of reading and writing data in storage device 1002 and auxiliary storage device 1003.

[0123] The processor 1001 controls the computer as a whole by instructing the operating system to operate. The processor 1001 may also be a central processing unit (CPU) that includes interfaces with peripheral devices, control units, arithmetic units, registers, etc. For example, the control unit 140 and control unit 240 described above can also be implemented using the processor 1001.

[0124] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage devices 1003 and communication devices 1004, and performs various processes accordingly. As a program, a program is used that causes the computer to perform at least a portion of the actions described in the above embodiments. For example, Figure 17 The control unit 140 of the base station 10 shown can also be implemented by a control program stored in the storage device 1002 and operated in the processor 1001. And, for example, Figure 18 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and operated in the processor 1001. Although it has been described that the various processes described above are executed by one processor 1001, the various processes described above can also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be implemented by more than one chip. In addition, the program can also be sent from the network via a telecommunications line.

[0125] Storage device 1002 is a computer-readable recording medium, and may be composed of at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. Storage device 1002 may also be referred to as a register, cache, main memory (main storage device), etc. Storage device 1002 can store programs (program code), software modules, etc., that are executable for implementing the communication method according to one embodiment of this disclosure.

[0126] The auxiliary storage device 1003 is a computer-readable recording medium, such as at least one of the following: CD-ROM (CompactDisc ROM) or other optical discs, hard disks, floppy disks, magneto-optical discs (e.g., compact discs, digital multifunction discs, Blu-ray discs), smart cards, flash memory (e.g., cards, sticks, key drives), floppy disks, magnetic stripes, etc. The aforementioned storage medium may, for example, be a database, server, or other suitable media that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0127] The communication device 1004 is hardware (transceiver) used for communication between computers via at least one of a wired network and a wireless network. It may also be referred to as a network device, network controller, network interface card (NIC), communication module, etc. The communication device 1004 may, for example, be configured to include a high-frequency switch, duplexer, filter, frequency synthesizer, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, transceiver antennas, amplifiers, transceiver units, transmission path interfaces, etc., can also be implemented using the communication device 1004. The transceiver unit may also be physically or logically separated into a transmitting unit and a receiving unit.

[0128] Input device 1005 is an input device that accepts input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, LED, etc.). Alternatively, input device 1005 and output device 1006 can also be integrated (e.g., a touch panel).

[0129] Furthermore, the processor 1001 and storage device 1002, among other devices, are connected via a bus 1007 for communicating information. The bus 1007 can be configured as a single bus or as different buses used between the devices.

[0130] Furthermore, the base station 10 and the terminal 20 can be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or a FPGA (Field Programmable Gate Array), and can also use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0131] Figure 20 An example of the structure of vehicle 2001 is shown. For example... Figure 20As shown, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a gearshift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. The various forms / implementations described in this disclosure can also be applied to communication devices mounted on the vehicle 2001, for example, to the communication module 2013.

[0132] The drive unit 2002 may be composed, for example, an engine, a motor, or a hybrid power system of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a steering wheel), configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel by the user.

[0133] The electronic control unit 2010 consists of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (I / O port) 2033. Signals from various sensors 2021 to 2029 of the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 can also be referred to as an ECU (Electronic Control Unit).

[0134] The signals from various sensors 2021 to 2029 include current signals from current sensor 2021 that senses the current of the motor, speed signals of the front or rear wheels obtained by speed sensor 2022, air pressure signals of the front or rear wheels obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depress signal obtained by accelerator pedal sensor 2029, brake pedal depress signal obtained by brake pedal sensor 2026, gear lever operation signals obtained by gear lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0135] The Information Service Unit 2012 comprises various devices such as a car navigation system, audio system, speakers, television, and radio, used to provide (output) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The Information Service Unit 2012 uses information obtained from external devices such as the communication module 2013 to provide various multimedia information and multimedia services to the occupants of the vehicle 2001. The Information Service Unit 2012 may include input devices that accept input from external sources (such as keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) and output devices that perform output to external sources (such as displays, speakers, LED lights, touch panels, etc.).

[0136] The Driver Assistance System 2030 comprises various devices used to prevent accidents or reduce driver workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning devices (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps), gyroscope systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System)), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. Furthermore, the Driver Assistance System 2030 transmits and receives various information via the communication module 2013 to achieve driver assistance or autonomous driving functions.

[0137] The communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 2001 via the communication port. For example, the communication module 2013 can send and receive data with the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gear shift lever 2006, front wheel 2007, rear wheel 2008, axle 2009, microprocessor 2031 in the electronic control unit 2010, memory (ROM, RAM) 2032, and sensors 2021 to 2029 in the vehicle 2001 via the communication port 2033.

[0138] The communication module 2013, controlled by the microprocessor 2031 of the electronic control unit 2010, is a communication device capable of communicating with external devices. For example, it can transmit and receive various types of information with external devices via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. External devices can be, for example, base stations, mobile stations, etc.

[0139] The communication module 2013 can also wirelessly transmit at least one of the signals input to the electronic control unit 2010 from the various sensors 2021-2028 described above, the information obtained based on those signals, and the information obtained via the information service unit 2012 based on input from an external source (user) to an external device. The electronic control unit 2010, the various sensors 2021-2028, and the information service unit 2012 can also be referred to as input units that receive input. For example, the PUSCH transmitted by the communication module 2013 can contain information based on the aforementioned inputs.

[0140] The communication module 2013 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) sent from external devices and displays it on the information service unit 2012 of the vehicle 2001. The information service unit 2012 can also be referred to as an output unit for outputting information (e.g., outputting information to devices such as displays and speakers based on PDSCH received by the communication module 2013 (or data / information decoded from that PDSCH). Furthermore, the communication module 2013 stores the various information received from external devices in a memory 2032 available to the microprocessor 2031. The microprocessor 2031 can also control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gearshift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc., of the vehicle 2001 based on the information stored in the memory 2032.

[0141] <Structures related to this embodiment>

[0142] (Item 1)

[0143] A terminal having: The control unit envisions that at least one of the low-power wake-up signal used in the first wireless access technology and the synchronization signal of the low-power wake-up signal is transmitted from the base station via the second wireless access technology; and The receiving unit receives from the base station at least one of the low-power wake-up signal and the synchronization signal of the low-power wake-up signal transmitted via the second wireless access technology.

[0144] (Item 2)

[0145] According to the terminal described in item 1, wherein, The receiving unit receives from the base station setting information related to the low-power wake-up signal and the synchronization signal of the low-power wake-up signal that can be used or can be used with assistance, the setting information including at least one of the following: Information on wireless access technologies; Information about the payload format; Information about the method used to generate the sequence; Information about the parameters in the sequence generation method; Information on timing, period, and frequency at the monitored location where the low-power wake-up signal can be sent; Information about the residential community; Information indicating whether only the low-power wake-up signal can be used; Information indicating whether only the synchronization signal of the low-power wake-up signal can be used; and This indicates whether the low-power wake-up signal and the synchronization signal of the low-power wake-up signal can be utilized.

[0146] (Item 3)

[0147] According to the terminal described in item 1, wherein, The control unit is designed to utilize a synchronization signal other than the synchronization signal of the low-power wake-up signal, which is used in the first wireless access technology, as a replacement for the synchronization signal of the low-power wake-up signal.

[0148] (Item 4)

[0149] According to the terminal described in item 1, wherein, The control unit envisions that a synchronization signal for the low-power wake-up signal transmitted via the first wireless access technology be applied based on coverage extension through repeated transmission. The receiving unit receives the synchronization signal of the low-power wake-up signal through the first wireless access technology, and receives the low-power wake-up signal through the second wireless access technology.

[0150] (Item 5)

[0151] A base station having: The control unit sets information related to the low-power wake-up signal and its synchronization signal, including information about the wireless access technology, timing, period, and frequency information at a monitoring location where the low-power wake-up signal can be transmitted, and cell information; and The transmitting unit, based on the aforementioned settings, transmits at least one of the low-power wake-up signal used in the first wireless access technology and the synchronization signal of the low-power wake-up signal via the second wireless access technology.

[0152] (Item 6)

[0153] A communication method, executed by a terminal, comprises the following steps: It is envisioned that at least one of the low-power wake-up signal used in the first wireless access technology and the synchronization signal of the low-power wake-up signal is transmitted via the second wireless access technology; and Receive at least one of the low-power wake-up signal and the synchronization signal of the low-power wake-up signal transmitted via the second wireless access technology.

[0154] Any of the above structures can improve the coverage characteristics of low-power wake-up signals (LP-WUS) in wireless communication systems.

[0155] (Supplement to the implementation method)

[0156] The embodiments of the present invention have been described above, but the disclosed invention is not limited to such embodiments. Those skilled in the art should understand various modifications, alterations, substitutions, and replacements. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these values ​​are merely examples, and any appropriate values ​​may be used. The distinctions between items in the above description are not essential to the present invention. Items described in two or more items may be combined as needed, and items described in one item may be applied to items described in another item (as long as there is no contradiction). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical components. Multiple functional units may be operated by a single physical component, or a single functional unit may be operated by multiple physical components. Regarding the processing described in the embodiments, the order of processing may be interchanged unless there is a contradiction. For ease of explanation, a functional block diagram is used to illustrate the base station 10 and terminal 20, but such a device may also be implemented by hardware, software, or a combination thereof. The software operating according to the embodiments of the present invention via the processor of the base station 10 and the software operating according to the embodiments of the present invention via the processor of the terminal 20 may also be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server and other suitable storage media, respectively.

[0157] Furthermore, the notification of information is not limited to the forms / implementations described in this disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. Additionally, RRC signaling may be referred to as an RRC message, for example, it may also be an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0158] The various forms / implementations described in this disclosure can also be applied to systems utilizing LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), other suitable systems, and next-generation systems extended therefrom. Furthermore, multiple systems can be combined (e.g., a combination of at least one of LTE and LTE-A with 5G, etc.) for application.

[0159] The processing procedures, timing, and flow of the various forms / implementations described in this specification may be rearranged in order, provided there is no contradiction. For example, the elements of various steps are indicated using an illustrative order for the methods described in this disclosure, but are not limited to the specific order indicated.

[0160] In this specification, certain actions performed by base station 10 may sometimes also be performed by its upper node, depending on the circumstances. In a network consisting of one or more network nodes having base station 10, it is obvious that various actions performed to communicate with terminal 20 can be performed by at least one of base station 10 and other network nodes besides base station 10 (e.g., considering MME or S-GW, but not limited to these). The above example illustrates the case where there is one other network node besides base station 10, but other network nodes can also be a combination of multiple other network nodes (e.g., MME and S-GW).

[0161] The information or signals described in this disclosure can be output from a higher (or lower) layer to a lower (or higher) layer. They can also be input or output via multiple network nodes.

[0162] Input or output information can be stored in a specific location (e.g., memory) or managed using a management table. Input or output information can be overwritten, updated, or appended. Output information can also be deleted. Input information can also be sent to other devices.

[0163] The determination in this disclosure can be made by a value represented by 1 bit (0 or 1), by a Boolean value (Boolean: true or false), or by a comparison of numerical values ​​(e.g., a comparison with a predetermined value).

[0164] Software, whether called software, firmware, middleware, microcode, hardware description language, or by other names, should be broadly interpreted as referring to commands, command sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0165] In addition, software, commands, and information can also be sent and received via transmission media. For example, when software is sent from a webpage, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of transmission media.

[0166] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc., that may be involved in the above description as a whole can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0167] Furthermore, the terms used in this disclosure and those necessary for understanding this disclosure may be replaced with terms that have the same or similar meanings. For example, at least one of the channel and symbol may also be a signal (signaling). Additionally, a signal may also be a message. Furthermore, a component carrier (CC) may also be referred to as carrier frequency, cell, frequency carrier, etc.

[0168] The terms “system” and “network” as used in this disclosure are used interchangeably.

[0169] Furthermore, the information, parameters, etc., described in this disclosure may be represented using absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources may be indicated using indexes.

[0170] The names used for the above parameters are non-limiting in any respect. Furthermore, the formulas, etc., using these parameters sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by all appropriate names, therefore the various names assigned to these channels and information elements are non-limiting in any respect.

[0171] In this disclosure, the terms "base station (BS)," "wireless base station," "base station device," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" are used interchangeably. Sometimes, terms such as macro cell, small cell, femtocell, and picocell are also used to refer to base stations.

[0172] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, its coverage area can be divided into several smaller areas, each of which can provide communication services through a base station subsystem (e.g., a small indoor base station RRH: Remote Radio Head). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0173] In this disclosure, the base station sending information to the terminal can also be replaced by the base station instructing the terminal on information-based control / actions.

[0174] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" can be used interchangeably.

[0175] For mobile stations, those skilled in the art sometimes also use the following terms: subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or some other appropriate terms.

[0176] At least one of the base station and mobile station can also be referred to as a transmitting device, receiving device, communication device, etc. Additionally, at least one of the base station and mobile station can also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to an object capable of movement, with arbitrary speed. This also includes situations where the mobile body is stationary. Examples of mobile bodies include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, two-wheeled trailers, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, Drone (registered trademark), multi-rotor helicopters, quadcopter helicopters, balloons, and objects mounted on them. Furthermore, the mobile body can also be a mobile body that moves autonomously based on operating commands. It can be a means of transportation (e.g., automobiles, airplanes, etc.), a mobile body moving in an unmanned manner (e.g., drones, autonomous vehicles, etc.), or a robot (humanized or unmanned). Additionally, at least one of the base station and mobile station also includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station can be an IoT (Internet of Things) device such as a sensor.

[0177] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, the communication between the base station and the user terminal can be replaced by communication between multiple terminals 20 (e.g., D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.), and various forms / implementations of this disclosure can also be applied. In this case, the terminal 20 can also be configured to have the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, uplink channel, downlink channel, etc., can also be replaced with side channel.

[0178] Similarly, the user terminal in this disclosure can be replaced by a base station. In this case, the base station can also be configured to have the functions of the aforementioned user terminal.

[0179] The terms "determining" and "determining" as used in this disclosure sometimes encompass a variety of actions. For example, "determining" or "determining" may include actions such as judging, calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or other data structure), and ascertaining, which are considered as actions of "determining" or "determining." Furthermore, "determining" or "determining" may include actions such as receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, and accessing (e.g., accessing data in memory), which are considered as actions of "determining" or "determining." Additionally, "determining" or "determining" may include actions such as resolving, selecting, choosing, establishing, and comparing, which are considered as actions of "determining" or "determining." That is, "judgment" and "decision" can include matters that are considered as having been "judged" or "decided". In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0180] The terms “connected,” “coupled,” or any variations thereof are intended to indicate any direct or indirect connection or combination between two or more elements, including cases where there is one or more intermediate elements between the two elements that are “connected” or “coupled.” The combination or connection between elements can be physical, logical, or a combination of these. For example, “access” can be used instead of “connected.” In the context of this disclosure, it can be understood that two elements are “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, and, as some non-limiting and non-inclusive examples, using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible regions) to “connect” or “couple” to each other.

[0181] The reference signal can be simply called RS (Reference Signal), or, depending on the standard applied, pilot.

[0182] As used in this disclosure, the word "based on" does not mean "based on only" unless otherwise expressly stated. In other words, the word "based on" means both "based on only" and "based on at least".

[0183] Any reference to elements using the designations "first," "second," etc., as used in this disclosure does not necessarily limit the number or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, references to the first and second elements do not imply that only two elements can be taken, or that in any form the first element must precede the second element.

[0184] Alternatively, the "unit" in the structure of the above devices can be replaced with "section", "circuit", "equipment", etc.

[0185] When the terms "include," "including," and their variations are used in this disclosure, these terms, like the term "comprising," imply inclusion. Furthermore, the term "or" as used in this disclosure does not refer to XOR.

[0186] A radio frame can consist of one or more frames in the time domain. In the time domain, one or more frames can be called subframes. A subframe can also consist of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0187] A parameter set can be communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set can represent at least one of the following: Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, and specific windowing processing performed by the transceiver in the time domain.

[0188] In the time domain, a time slot can be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A time slot can be a time unit based on a set of parameters.

[0189] A time slot can contain multiple mini-time slots. Each mini-time slot can consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can consist of fewer symbols than a time slot. PDSCH (or PUSCH) transmitted in time units larger than mini-time slots can be called PDSCH (or PUSCH) mapping type (type) A. PDSCH (or PUSCH) transmitted using mini-time slots can be called PDSCH (or PUSCH) mapping type (type) B.

[0190] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can each be referred to by other corresponding names.

[0191] For example, a subframe can be called a Transmission Time Interval (TTI), multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may not be called a subframe, but a time slot, mini-time slot, etc.

[0192] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules the allocation of radio resources (bandwidth, transmit power, etc., available to each terminal 20) in units of TTI. However, the definition of TTI is not limited to this.

[0193] The Time Interval (TTI) can be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., or it can be a processing unit such as scheduling or link adaptation. Furthermore, when a TTI is given, the actual time interval (e.g., the number of symbols) that the transmission block, code block, codeword, etc., are mapped to can be shorter than the TTI.

[0194] Furthermore, when one time slot or one mini time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini time slot) can become the minimum time unit for scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of the schedule can be controlled.

[0195] A TTI with a duration of 1ms is also called a normal TTI (TTI in LTE Rel.8-12), a long TTI, a normal subframe, a long subframe, or a time slot. A TTI shorter than a normal TTI can also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini time slot, a sub-time slot, or a time slot.

[0196] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can be understood as a TTI with a duration of more than 1ms, and a short TTI (e.g., a shortened TTI, etc.) can be understood as a TTI with a duration of less than a long TTI but more than 1ms.

[0197] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can contain one or more consecutive subcarriers. The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined based on the parameter set.

[0198] Furthermore, the temporal domain of an RB can contain one or more symbols, which can be a time slot, a mini-time slot, a subframe, or the length of a TTI. A TTI, a subframe, etc., can each be composed of one or more resource blocks.

[0199] In addition, one or more RBs can also be called Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0200] Furthermore, a resource block can consist of one or more resource elements (REs). For example, one RE can be a radio resource area consisting of one subcarrier and one symbol.

[0201] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of contiguous common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can be determined by indexing RBs based on a common reference point of that carrier. PRBs can be defined and numbered within a BWP.

[0202] A BWP can include a UL BWP and a DL BWP. One or more BWPs can be set for a UE within a single carrier.

[0203] At least one of the configured BWPs can be active, and the scenario of the UE transmitting or receiving predetermined signals / channels outside of the active BWP is not considered. Furthermore, the terms "cell," "carrier," etc., used in this disclosure can be replaced with "BWP."

[0204] The structures of radio frames, subframes, time slots, mini-time slots, and symbols described above are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0205] In this disclosure, for example, in cases where articles are added through translation, such as in English (a, an, and the), this disclosure also includes cases where the noun following these articles is in a plural form.

[0206] In this disclosure, the phrase "A and B are different" can mean "A and B are not the same." Additionally, this phrase can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0207] The various forms / implementations described in this disclosure can be used individually or in combination, and can be switched depending on the execution. Furthermore, the notification of predetermined information (e.g., a "It is X" notification) is not limited to being explicit, but can also be implicit (e.g., not being notified of the predetermined information).

[0208] The present disclosure has been described in detail above, but it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the present disclosure is for illustrative purposes only and is not intended to be limiting.

[0209] Label Explanation

[0210] 10: Base station

[0211] 110: Sending Department

[0212] 120: Receiving Department

[0213] 130: Setting Department

[0214] 140: Control Department

[0215] 20: Terminal

[0216] 210: Sending Department

[0217] 220: Receiving Department

[0218] 230: Setting Department

[0219] 240: Control Department

[0220] 1001: Processor

[0221] 1002: Storage device

[0222] 1003: Auxiliary storage device

[0223] 1004: Communication device

[0224] 1005: Input device

[0225] 1006: Output device

[0226] 2001: Vehicles

[0227] 2002: Drive Unit

[0228] 2003: Steering Unit

[0229] 2004: Accelerator Pedal

[0230] 2005: Brake Pedal

[0231] 2006: Gear Shift

[0232] 2007: Front Wheel

[0233] 2008: Rear Wheel

[0234] 2009: Axle

[0235] 2010: Electronic Control Department

[0236] 2012: Information Services Department

[0237] 2013: Communication Module

[0238] 2021: Current Sensor

[0239] 2022: Speed ​​Sensor

[0240] 2023: Barometric Pressure Sensor

[0241] 2024: Vehicle Speed ​​Sensor

[0242] 2025: Accelerometer

[0243] 2026: Brake Pedal Sensor

[0244] 2027: Gearshift Sensor

[0245] 2028: Object Detection Sensor

[0246] 2029: Accelerator Pedal Sensor

[0247] 2030: Driver Assistance Systems Department

[0248] 2031: Microprocessors

[0249] 2032: Memory (ROM, RAM)

[0250] 2033: Communication port (IO port)

Claims

1. A terminal having: a control section that assumes that at least one of a low-power wake-up signal used in a first radio access technology and a synchronization signal of the low-power wake-up signal is transmitted from a base station by a second radio access technology; and a reception section that receives at least one of the low-power wake-up signal and the synchronization signal of the low-power wake-up signal transmitted by the second radio access technology from the base station.

2. The terminal according to claim 1, wherein the reception section receives setting information related to the low-power wake-up signal and the synchronization signal of the low-power wake-up signal that can be used or can assist in being used from the base station, the setting information including at least one of: information of a radio access technology; information of a format of a payload; information of a generation method of a sequence; information of a parameter in the generation method of the sequence; information including timing, a period, and a frequency at a monitoring position of an opportunity at which the low-power wake-up signal can be transmitted; information of a cell; information indicating whether only the low-power wake-up signal can be used; information indicating whether only the synchronization signal of the low-power wake-up signal can be used; and information indicating whether both the low-power wake-up signal and the synchronization signal of the low-power wake-up signal can be used.

3. The terminal according to claim 1, wherein the control section assumes that, as a substitute for the synchronization signal of the low-power wake-up signal, a synchronization signal other than the synchronization signal of the low-power wake-up signal used in the first radio access technology can be used.

4. The terminal according to claim 1, wherein the control section assumes that, with respect to the synchronization signal of the low-power wake-up signal transmitted by the first radio access technology, coverage range expansion based on repeated transmission is applied, the reception section receives the synchronization signal of the low-power wake-up signal by the first radio access technology and receives the low-power wake-up signal by the second radio access technology.

5. A base station having: a control section that sets information related to a low-power wake-up signal and a synchronization signal of the low-power wake-up signal, the information including information of a radio access technology, information including timing, a period, and a frequency at a monitoring position of an opportunity at which the low-power wake-up signal can be transmitted, and information of a cell; and a transmission section that transmits at least one of the low-power wake-up signal and the synchronization signal of the low-power wake-up signal used in a first radio access technology by a second radio access technology based on the setting.

6. A communication method executed by a terminal, having the steps of: assuming that at least one of a low-power wake-up signal used in a first radio access technology and a synchronization signal of the low-power wake-up signal is transmitted by a second radio access technology; and receiving at least one of the low-power wake-up signal and the synchronization signal of the low-power wake-up signal transmitted by the second radio access technology. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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