Terminal and communication method

Abstract

To monitor a low-power wake-up signal appropriately depending on the method applied to the low-power wake-up signal.SOLUTION: A terminal includes a receiving unit that monitors a low-power wake-up signal from a base station, and a control unit that determines a method to be applied to the low-power wake-up signal on the basis of at least one of instruction information indicating a method to be applied to the low-power wake-up signal from the base station or a terminal capability of the terminal regarding a method to be applied to the low-power wake-up signal, and the control unit controls the monitoring based on the determined method, and the method is a bitmap method or a codepoint method.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a terminal and a communication method in a wireless communication system. [Background technology]

[0002] The 3GPP (registered trademark) (3rd Generation Partnership Project) is currently discussing whether to apply the bitmap method or the codepoint method to the Low Power Wake-Up Signal (LP-WUS). These methods have different advantages in terms of, for example, overhead size, ease of design, ease of resource management, and energy efficiency. Therefore, it is possible that the LP-WUS will support both the bitmap method and the codepoint method, or that different methods will be used for the RRC CONNECTED state and the RRC IDLE / INACTIVE state. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] 3GPP TS 38.300 V18.4.0 (2024-12) [Non-patent document 2] 3GPP TS 38.401 V18.4.0(2024-12) Summary of the Invention [Problem to be solved by the invention]

[0004] However, it has not been clear how to set the method used by LP-WUS in a terminal or how to switch between the two methods, which may result in the terminal not being able to properly perform LP-WUS monitoring and receive LP-WUS. [Means for solving the problem]

[0005] The terminal in this embodiment comprises a receiving unit that monitors a low-power wake-up signal from a base station, and a control unit that determines a method to be applied to the low-power wake-up signal based on at least one of instruction information indicating a method to be applied to the low-power wake-up signal from the base station or a terminal capability of the terminal regarding a method to be applied to the low-power wake-up signal, and the control unit controls the monitoring based on the determined method, and the method is a bitmap method or a codepoint method. [Effects of the Invention]

[0006] According to this embodiment, it is possible to appropriately monitor the low power wakeup signal depending on the method applied to the low power wakeup signal. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 2] FIG. 10 is a sequence diagram showing an example of the operation of a terminal and a base station in Example 1-1. [Figure 3] FIG. 10 is a sequence diagram showing an example of the operation of a terminal and a base station in Example 1-2. [Figure 4] FIG. 10 is a sequence diagram showing an example of the operation of a terminal and a base station in Example 1-3. [Figure 5] FIG. 10 is a sequence diagram showing an example of the operation of a terminal and a base station in a modified example of Examples 1-2 and 1-3. [Figure 6] FIG. 10 is a sequence diagram showing an example of the operation of a terminal and a base station in Example 1-4. [Figure 7] FIG. 10 is a sequence diagram showing an example of the operation of a terminal and a base station in Example 2-1. [Figure 8] FIG. 10 is a sequence diagram showing an example of the operation of a terminal and a base station in Example 2-2. [Figure 9]FIG. 10 is a sequence diagram showing an example of the operation of a terminal and a base station in Example 2-3. [Figure 10] FIG. 10 is a sequence diagram showing an example of the operation of a terminal and a base station in a modified example of Examples 2-2 and 2-3. [Figure 11] FIG. 10 is a sequence diagram showing an example of the operation of a terminal and a base station in Example 2-4. [Figure 12] FIG. 2 is a diagram illustrating an example of a functional configuration of a base station according to the present embodiment. [Figure 13] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal according to the present embodiment. [Figure 14] FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station or a terminal according to the present embodiment. [Figure 15] 1 is a diagram illustrating an example of a configuration of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0008] The present embodiment will be described below with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0009] The wireless communication system of this embodiment operates using existing technology. The existing technology is, for example, a wireless communication technology based on a communication standard such as the 3GPP standard. The existing technology is, for example, NR (New Radio), but is not limited to existing NR. Unless otherwise specified, the term "NR" used in this specification has a broad meaning including NR (5G) and subsequent systems (for example, 6G).

[0010] In the present embodiment described below, terms used in existing communication standards, such as 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), are used. This is for convenience of description, and similar signals, functions, etc. may be called by other names.

[0011] In this embodiment, the duplex method may be a time division duplex (TDD) method, a frequency division duplex (FDD) method, or other methods (for example, flexible duplex, etc.).

[0012] In this embodiment, when radio parameters etc. are "configured," it may mean that a predetermined value is pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are set.

[0013] Fig. 1 is a diagram showing an example of the configuration of a wireless communication system in this embodiment. As shown in Fig. 1, the wireless communication system in this embodiment includes a base station 10 and a terminal 20. Although Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.

[0014] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain. The time domain may be defined by the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, a PSS and an SSS. The system information is, for example, transmitted via a PBCH and is also referred to as broadcast information. The synchronization signal and system information may be referred to as an SSB (SS / PBCH block). As shown in FIG. 1 , the base station 10 transmits control signals or data to the terminal 20 in a downlink (DL) and receives control signals or data from the terminal 20 in an uplink (UL). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. Furthermore, both the base station 10 and the terminal 20 are capable of applying MIMO (Multiple Input Multiple Output) communication to the DL or UL. In addition, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) using CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).

[0015] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or an M2M (Machine-to-Machine) communication module. As shown in Fig. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10 and measures the propagation path quality based on the reception results of the reference signals.

[0016] The terminal 20 in this embodiment may be, for example, a LP-WUR or an OFDM-based LP-WUR. The OFDM-based LP-WUR is a power-saving wake-up receiver that receives a LP-WUR using OFDM technology. The OFDM-based LP-WUR receives information using an OFDM sequence overlaid on an OOK "ON" symbol.

[0017] In the following description, " / " means "and / or" unless otherwise specified or unless a different meaning is clear from the context.

[0018] In 3GPP, there is a discussion on whether the bitmap method or the codepoint method should be applied to LP-WUS.

[0019] In the bitmap method, each bit corresponds to one or more terminals, and there are variations such as bit unit, bitmap level, and CRC. In the codepoint method, each codepoint corresponds to one or more terminals, and there are one-to-one, one-to-all, and one-to-X (1 < X < L) mappings. The characteristics of the bitmap method and codepoint method are as follows:

[0020] For example, the bitmap method has a low false start rate and a high power saving effect, but the base station needs to transmit all bits, which may reduce energy efficiency.On the other hand, the codepoint method improves the energy efficiency of the base station because the base station does not need to transmit unnecessary bits when the terminal is not being paged, but the false start rate may be higher than the bitmap method.

[0021] For example, the bitmap method requires fewer MOs (Monitoring Occasions) and simplifies resource management, especially in a TDD environment. On the other hand, the codepoint method allows for more flexible link adaptation, but requires a larger number of MOs, potentially making resource management more complex.

[0022] For example, the bitmap method has a simple design, and the terminal side reception processing is easy and only needs to monitor a single MO. On the other hand, the codepoint method has a complex design and needs to monitor multiple MOs, which may increase the burden on the terminal.

[0023] For example, the bitmap method is advantageous when the traffic arrival probability is medium to high, and the number of MOs is small, which reduces overhead. On the other hand, the codepoint method allows for adaptive link design for each terminal and enables early termination of LP-WUS detection, but it tends to require a large number of MOs.

[0024] As such, these two methods have different advantages in terms of, for example, overhead size, ease of design, ease of resource management, and energy efficiency. Therefore, it is possible that LP-WUS supports both the bitmap method and the codepoint method, or that different methods are used in the RRC CONNECTED state and the RRC IDLE / INACTIVE state.

[0025] However, it has not been clear how to set the method used by LP-WUS in a terminal or how to switch between the two methods, which may result in the terminal not being able to properly perform LP-WUS monitoring and receive LP-WUS.

[0026] This embodiment provides a method for a terminal 20 in an RRC CONNECTED mode or an IDLE / INACTIVE mode to determine a scheme to be used by an LP-WUS and to perform LP-WUS monitoring based on the determined scheme. Furthermore, this embodiment realizes a method for flexibly switching between multiple schemes used by an LP-WUS.

[0027] The LP-WUS in this embodiment uses a bitmap method or a codepoint method. LP-WUS information indicating the contents of the LP-WUS is represented by a bitmap method or a codepoint method. The bitmap method and the codepoint method may be collectively referred to as, for example, an addressing method, an encoding method, an identification method, or a signaling method.

[0028] The bitmap method is a method in which LP-WUS information for each terminal is expressed as a bit string (bitmap). For example, if a bit is "1", a wake-up signal is sent to the corresponding terminal 20. The terminal 20 checks its corresponding bit and wakes up if it is "1".

[0029] The code point method is a method of identifying LP-WUS information using a predefined code point (a specific number or symbol). For example, when a specific code point is transmitted, the terminal interprets it to determine which terminal it corresponds to.

[0030] For LP-WUS, a CRC (Cyclic Redundancy Check) may be applied to perform error detection.

[0031] Example 1 In the first embodiment, a method for determining the scheme (for example, bitmap scheme or codepoint scheme) to be used by the LP-WUS in the RRC CONNECTED mode is shown. Furthermore, whether or not to apply CRC to the LP-WUS information may be determined.

[0032] (Example 1-1) According to Example 1-1, in the RRC CONNECTED mode, whether the scheme applied to the LP-WUS information is the bitmap scheme or the codepoint scheme may be determined based on a predefined rule (condition).

[0033] FIG. 2 is a sequence diagram showing an example of the operation of the terminal 20 and the base station 10 in Example 1-1. As shown in FIG. 2, in step S101, the state of the terminal 20 is RRC CONNECTED mode, or the terminal 20 may transition to RRC CONNECTED mode. In step S102, the base station 10 determines the method (bitmap method or codepoint method) to be used by the LP-WUS based on a predetermined rule. In step S103, the base station 10 instructs the terminal 20 on the determined method to be used by the LP-WUS. In step S104, the terminal 20 assumes receipt of LP-WUS information using the instructed method. In step S105, the base station 10 transmits LP-WUS information using the determined method to the terminal 20. The terminal 20 monitors the LP-WUS information transmitted from the base station 10 based on the method assumed to be used by the LP-WUS, and receives the LP-WUS information.

[0034] For example, based on the result of comparing a predetermined parameter with a threshold, it may be determined whether the scheme to be applied to the LP-WUS information is the bitmap scheme or the codepoint scheme. The comparison of the predetermined parameter with the threshold corresponds to, for example, the operation of the base station 10 in step S102 of Fig. 2. However, the comparison of the predetermined parameter with the threshold may also be performed by the terminal 20.

[0035] The threshold "X" may be instructed or set by the base station 10 to the terminal 20, or may be set based on the terminal capability (UE capability) of the terminal 20.

[0036] (Example 1-1-1) The predetermined parameter may be traffic probability. The method to be applied to the LP-WUS information may be determined based on the traffic probability of the terminal 20 calculated for each C-DRX cycle of the base station 10.

[0037] For example, when the traffic probability is low (e.g., 10% or less), it may be determined that the codepoint method is applied to the LP-WUS information, and when the traffic probability is medium (e.g., higher than 10%) and high (e.g., higher than 30%), it may be determined that the bitmap method is applied to the LP-WUS information.

[0038] (Example 1-1-2) The predetermined parameter may be the size of the UE group. The method applied to the LP-WUS information may be determined based on the size of the UE group.

[0039] For example, when the size of the UE group is small (e.g., less than or equal to 8), it may be determined that the codepoint method is applied to the LP-WUS information. When the size of the UE group is large (e.g., more than 8), it may be determined that the bitmap method is applied to the LP-WUS information.

[0040] (Example 1-1-3) The predetermined parameter may be a false alarm rate (FAR). The method applied to the LP-WUS information may be determined based on the FAR. The FAR is calculated by dividing the number of false alarms by the total number of non-event trials.

[0041] For example, if the false start rate is high (e.g., above a predetermined threshold), it may be determined that the bitmap method is applied to the LP-WUS information, and if the false start rate is low (e.g., below a predetermined threshold), it may be determined that the codepoint method is applied to the LP-WUS information.

[0042] (Example 1-1-4) The predetermined parameter may be the DRX cycle. The method to be applied to the LP-WUS information may be determined based on the length of the C-DRX cycle of the terminal 20.

[0043] For example, if the C-DRX cycle is long (e.g., equal to or greater than a predetermined threshold), it may be determined that the bitmap method is applied to the LP-WUS information, and if the C-DRX cycle is short (e.g., smaller than a predetermined threshold), it may be determined that the codepoint method is applied to the LP-WUS information.

[0044] (Example 1-1-5) The predetermined parameter may be a communication quality index (radio environment index) (e.g., RSRP, SINR, RSSI, RSRQ). The method to be applied to the LP-WUS information may be determined based on the communication quality index received by the terminal 20.

[0045] For example, if the communication quality is good (e.g., RSRP is above a predetermined threshold), it may be determined that the code point method without CRC is applied to the LP-WUS information, and if the communication quality is poor (e.g., RSRP is below a threshold), it may be determined that the bitmap method is applied to the LP-WUS information with CRC.

[0046] (Example 1-1-6) The predetermined parameter may be the LP-WUS information bit length. The scheme to be applied to the LP-WUS information may be determined based on the bit length of the LP-WUS information estimated by the terminal 20 based on the signal transmitted by the base station 10.

[0047] For example, a signal transmitted from the base station 10 to the terminal 20 may indicate whether any one or any combination of the above embodiments 1-1-1 to 1-6 should be applied, or whether the bitmap method or the codepoint method should be used.

[0048] (Example 1-2) According to Example 1-2, in the RRC CONNECTED mode, whether the scheme applied to the LP-WUS information is the bitmap scheme or the codepoint scheme may be configured or instructed to the terminal 20 by a predetermined signal from the network (e.g., the base station 10). The predetermined signal may be, for example, a system information block (SIB), a radio resource control (RRC), a medium access control element (MAC CE), or a downlink control information (DCI).

[0049] 3 is a sequence diagram showing an example of the operation of the terminal 20 and the base station 10 in Example 1-2. As shown in FIG. 3, in step S111, the state of the terminal 20 is in the RRC CONNECTED mode, or the terminal 20 may transition to the RRC CONNECTED mode.

[0050] In step S112, the base station 10 transmits information (instruction information) indicating the method (bitmap method or codepoint method) used by the LP-WUS. This instruction information allows the method used by the LP-WUS to be flexibly switched.

[0051] In step S113, the terminal 20 assumes receipt of LP-WUS information using the instructed method. In step S114, the base station 10 transmits LP-WUS information using the method instructed in step S112 to the terminal 20. The terminal 20 monitors the LP-WUS information transmitted from the base station 10 based on the method used by the assumed LP-WUS, and receives the LP-WUS information.

[0052] The terminal 20 may assume as a default whether the scheme applied to the LP-WUS information is the bitmap scheme or the codepoint scheme. That is, a default value indicating whether the scheme applied to the LP-WUS information is the bitmap scheme or the codepoint scheme may be set for the terminal 20. This default value may be, for example, a value defined in advance by a specification (for example, a 3GPP specification), or may be set or instructed by the base station 10 via an SIB, an RRC, a MAC CE, or a DCI.

[0053] (Examples 1-3) According to the first to third embodiments, the method applied to the LP-WUS information may be determined based on the terminal capability of the terminal 20 (UE capability).

[0054] 4 is a sequence diagram showing an example of the operation of the terminal 20 and the base station 10 in Examples 1-3. As shown in FIG. 4, in step S121, the state of the terminal 20 is in RRC CONNECTED mode, or the terminal 20 may transition to RRC CONNECTED mode. In step S122, the terminal 20 assumes reception of LP-WUS information using the bitmap method or the codepoint method based on the terminal capability information. In step S123, the base station 10 transmits LP-WUS information using the bitmap method or the codepoint method to the terminal 20. The terminal 20 monitors the LP-WUS information transmitted from the base station 10 based on the method used by the assumed LP-WUS, and receives the LP-WUS information.

[0055] For example, the terminal 20 may assume, in the terminal capability, a scheme (bitmap scheme or codepoint scheme) to be applied to the preferred or preferred LP-WUS information. The scheme to be applied to the preferred or preferred LP-WUS information for the terminal 20 may be set as a parameter of the terminal capability. The base station 10 may determine either the bitmap scheme or the codepoint scheme based on the terminal capability indicating the scheme to be applied to the LP-WUS information reported from the terminal 20. The base station 10 may configure or instruct the terminal 20 to use either the bitmap scheme or the codepoint scheme determined based on the terminal capability via the SIB, RRC, MAC CE or DCI.

[0056] The terminal capability may include information indicating the method (bitmap method and / or codepoint method) applied to the LP-WUS information supported by the terminal 20. If the terminal 20 supports both the bitmap method and the codepoint method in the terminal capability, the terminal 20 may operate according to any one of the above-mentioned examples 1-1, 1-2, or 1-4.

[0057] For example, the terminal 20 may determine the scheme (bitmap scheme or codepoint scheme) to be applied to the LP-WUS information based on the LP-WUS receiver type included in the terminal capabilities. The LP-WUS receiver type may be the type of reception scheme (e.g., OOK-based LR (Low-power Reception) or OFDM-based LR). OOK-based LR is the lowest power consumption reception scheme and uses OOK scheme that uses ON / OFF signaling. OFDM-based LR is a reception scheme that uses low power consumption OFDM scheme to achieve more reliable communication than OOK. The LP-WUS receiver type may be set as a parameter of the terminal capabilities possessed by the terminal 20. The base station 10 may determine either the bitmap scheme or the codepoint scheme as the scheme to be applied to the LP-WUS information based on the terminal capabilities indicating the LP-WUS receiver type reported from the terminal 20. The base station 10 may set or instruct the terminal 20 to use the bitmap scheme or the codepoint scheme determined based on the terminal capabilities via the SIB, RRC, MAC CE, or DCI.

[0058] In Examples 1 to 3, the terminal 20 may assume a default value of the method (bitmap method or codepoint method) to be applied to the LP-WUS information based on the terminal capability. That is, a default value of the method to be applied to the LP-WUS information based on the terminal capability may be set for the terminal 20. The default value of the method to be applied to the LP-WUS information based on the terminal capability may be, for example, a value defined in advance by a specification (for example, a 3GPP specification), or may be set or instructed by the base station 10 via the SIB, RRC, MAC CE, or DCI.

[0059] The above-described Examples 1-2 and 1-3 may be used in combination as shown in Fig. 5. In the example of Fig. 5, in step S131, the state of the terminal 20 may be in the RRC CONNECTED mode or the terminal 20 may transition to the RRC CONNECTED mode.

[0060] In step S132, the terminal 20 transmits terminal capability information to the base station 10. The terminal capability information is at least one of a method (bitmap method and / or codepoint method) applied to LP-WUS information supported by the terminal 20, a method applied to LP-WUS information suitable for the terminal 20, or a type of LP-WUS receiver.

[0061] In step S133, the base station 10 determines the method (bitmap method or codepoint method) to be used by the LP-WUS based on the terminal capability information. In step S134, the base station 10 transmits LP-WUS information using the method determined in step S133 to the terminal 20. In step S135, the base station 10 transmits LP-WUS information using the method determined in step S133 to the terminal 20. The terminal 20 monitors the LP-WUS information transmitted from the base station 10 based on the method used by the assumed LP-WUS, and receives the LP-WUS information.

[0062] (Examples 1-4) According to the first to fourth embodiments, the method (bitmap method or codepoint method) applied to the LP-WUS information based on the terminal capability may be determined based on a predetermined timer.

[0063] FIG. 6 is a sequence diagram showing an example of the operation of the terminal 20 and the base station 10 in Examples 1-4. As shown in FIG. 6, in step S141, the state of the terminal 20 is in RRC CONNECTED mode, or the terminal 20 may transition to RRC CONNECTED mode. In step S142, the terminal 20 switches the method (bitmap method or codepoint method) applied to the LP-WUS information based on a predetermined timer. The terminal 20 assumes reception of the LP-WUS information using the switched method. In step S143, the base station 10 transmits LP-WUS information using the bitmap method or the codepoint method to the terminal 20. The terminal 20 monitors the LP-WUS information transmitted from the base station 10 based on the method used by the assumed LP-WUS, and receives the LP-WUS information.

[0064] (Example 1-4-1) According to Example 1-4-1, a switching timer may be defined for switching whether the bitmap method or the codepoint method is set as the default in the terminal 20. The switching timer may be notified to the terminal 20 from the network (base station 10) or may be defined by specifications (for example, 3GPP specifications).

[0065] (Example 1-4-2) According to Example 1-4-2, a bitmap / codepoint switching timer for switching between the bitmap method and the codepoint method set in the terminal 20 may be defined.

[0066] The default value of the bitmap / codepoint switching timer may be notified to the terminal 20 from the network (base station 10) or may be defined by specifications (for example, 3GPP specifications).

[0067] The bitmap / codepoint switching timer may be determined based on the DRX (Discontinuous Reception) cycle.

[0068] For example, the validity period "Y" of the bitmap / codepoint switching timer may be determined based on the formula Y = DRX cycle / X. The DRX cycle in this formula may have a different value depending on the IDLE / INACTIVE / CONNECTED mode. "X" may be any value, for example, any of 1, 2, 4, and 8. The value of "X" may be notified to the terminal 20 from the network (base station 10) or may be defined by specifications (for example, 3GPP specifications).

[0069] (Example 1-4-3) In Example 1-4-3, trigger conditions for the switching timers in Examples 1-4-1 and 1-4-2 are defined.

[0070] The trigger for activating the timer function may be, for example, a signal transmitted from the network (base station 10) to the terminal 20, or detection of a change in the SSB index of an RRM (Radio Resource Management) measurement due to a change in beam.

[0071] The trigger for disabling the timer function may be, for example, a signal transmitted from the network (base station 10) to the terminal 20.

[0072] As described above, according to the first embodiment, the terminal 20 in the RRC CONNECTED mode can determine (assume) the scheme (e.g., bitmap scheme or codepoint scheme) to be used by the LP-WUS and can perform LP-WUS monitoring based on the determined scheme. Furthermore, according to the first embodiment, it is possible to flexibly switch between multiple schemes used by the LP-WUS.

[0073] Example 2 In the second embodiment, a method for determining a scheme (for example, a bitmap scheme or a codepoint scheme) to be used by the LP-WUS in RRC IDLE / INACTIVE is shown. Furthermore, whether or not to apply CRC to the LP-WUS information may be determined.

[0074] Example 2-1 According to Example 2-1, in RRC IDLE / INACTIVE mode, whether the scheme applied to LP-WUS information is the bitmap scheme or the codepoint scheme may be determined based on predefined rules (conditions).

[0075] FIG. 7 is a sequence diagram showing an example of the operation of the terminal 20 and the base station 10 in Example 2-1. As shown in FIG. 7, in step S201, the state of the terminal 20 is RRC IDLE / INACTIVE mode, or the terminal 20 may transition to RRC IDLE / INACTIVE mode. In step S202, the base station 10 determines the method (bitmap method or codepoint method) to be used by the LP-WUS based on a predetermined rule. In step S203, the base station 10 instructs the terminal 20 on the method to be used by the determined LP-WUS. In step S204, the terminal 20 assumes receipt of LP-WUS information using the instructed method. In step S205, the base station 10 transmits LP-WUS information using the determined method to the terminal 20. The terminal 20 monitors the LP-WUS information transmitted from the base station 10 based on the method to be used by the assumed LP-WUS, and receives the LP-WUS information.

[0076] For example, based on the result of the comparison between a predetermined parameter and a threshold, it may be determined whether the scheme to be applied to the LP-WUS information is the bitmap scheme or the codepoint scheme. The comparison between the predetermined parameter and the threshold corresponds to, for example, the operation of the base station 10 in step S202 of Fig. 7. However, the comparison between the predetermined parameter and the threshold may also be performed by the terminal 20.

[0077] The threshold "X" may be instructed or set by the base station 10 to the terminal 20, or may be set based on the terminal capability (UE capability) of the terminal 20.

[0078] (Example 2-1-1) The predetermined parameter may be a paging rate for each subgroup. A method to be applied to the LP-WUS information may be determined based on the paging rate for each subgroup.

[0079] For example, when the paging rate per subgroup is low (e.g., 1% or less), it may be determined that the codepoint method is applied to the LP-WUS information, and when the paging rate per subgroup is high (e.g., higher than 1%), it may be determined that the bitmap method is applied to the LP-WUS information.

[0080] (Example 2-1-2) The predetermined parameter may be the size of the UE group. The method applied to the LP-WUS information may be determined based on the size of the UE group.

[0081] For example, when the size of the UE group is small (e.g., less than or equal to 8), it may be determined that the codepoint method is applied to the LP-WUS information. When the size of the UE group is large (e.g., more than 8), it may be determined that the bitmap method is applied to the LP-WUS information.

[0082] (Example 2-1-3) The predetermined parameter may be a false alarm rate (FAR). The method applied to the LP-WUS information may be determined based on the FAR. The FAR is calculated by dividing the number of false alarms by the total number of non-event trials.

[0083] For example, if the false start rate is high (e.g., above a predetermined threshold), it may be determined that the bitmap method is applied to the LP-WUS information, and if the false start rate is low (e.g., below a predetermined threshold), it may be determined that the codepoint method is applied to the LP-WUS information.

[0084] (Example 2-1-4) The predetermined parameter may be the DRX cycle. The method to be applied to the LP-WUS information may be determined based on the length of the C-DRX cycle of the terminal 20.

[0085] For example, if the C-DRX cycle is long (e.g., equal to or greater than a predetermined threshold), it may be determined that the bitmap method is applied to the LP-WUS information, and if the C-DRX cycle is short (e.g., smaller than a predetermined threshold), it may be determined that the codepoint method is applied to the LP-WUS information.

[0086] (Example 2-1-5) The predetermined parameter may be a communication quality index (radio environment index) (e.g., RSRP, SINR, RSSI, RSRQ). The method to be applied to the LP-WUS information may be determined based on the communication quality index received by the terminal 20.

[0087] For example, if the communication quality is good (e.g., RSRP is above a predetermined threshold), it may be determined that the code point method without CRC is applied to the LP-WUS information, and if the communication quality is poor (e.g., RSRP is below a threshold), it may be determined that the bitmap method is applied to the LP-WUS information with CRC.

[0088] (Example 2-1-6) The predetermined parameter may be the LP-WUS information bit length. The scheme to be applied to the LP-WUS information may be determined based on the bit length of the LP-WUS information estimated by the terminal 20 based on the signal transmitted by the base station 10.

[0089] For example, a signal transmitted from the base station 10 to the terminal 20 may indicate whether any one or any combination of the above embodiments 2-1-1 to 1-6 should be applied, or whether the bitmap method or the codepoint method should be used.

[0090] (Example 2-2) According to Example 2-2, in the RRC IDLE / INACTIVE mode, whether the scheme applied to the LP-WUS information is the bitmap scheme or the codepoint scheme may be configured or instructed to the terminal 20 by a predetermined signal from the network (e.g., the base station 10). The predetermined signal may be, for example, an SIB, an RRC, a MAC CE, or a DCI.

[0091] 8 is a sequence diagram showing an example of the operation of the terminal 20 and the base station 10 in Example 2-2. As shown in FIG. 8, in step S211, the state of the terminal 20 is the RRC IDLE / INACTIVE mode, or the terminal 20 may transition to the RRC IDLE / INACTIVE mode.

[0092] In step S212, the base station 10 transmits information (instruction information) indicating the method (bitmap method or codepoint method) used by the LP-WUS. This instruction information allows the method used by the LP-WUS to be flexibly switched.

[0093] In step S213, the terminal 20 assumes receipt of LP-WUS information using the instructed method. In step S214, the base station 10 transmits LP-WUS information using the method instructed in step S212 to the terminal 20. The terminal 20 monitors the LP-WUS information transmitted from the base station 10 based on the method used by the assumed LP-WUS, and receives the LP-WUS information.

[0094] The terminal 20 may assume as a default whether the scheme applied to the LP-WUS information is the bitmap scheme or the codepoint scheme. That is, a default value indicating whether the scheme applied to the LP-WUS information is the bitmap scheme or the codepoint scheme may be set for the terminal 20. This default value may be, for example, a value defined in advance by a specification (for example, a 3GPP specification), or may be set or instructed by the base station 10 via an SIB, an RRC, a MAC CE, or a DCI.

[0095] (Example 2-3) According to Example 2-3, the method applied to the LP-WUS information may be determined based on the terminal capability of the terminal 20 (UE capability).

[0096] 11 is a sequence diagram showing an example of the operation of the terminal 20 and the base station 10 in Example 2-3. As shown in FIG. 11, in step S221, the state of the terminal 20 is RRC IDLE / INACTIVE mode, or the terminal 20 may transition to RRC IDLE / INACTIVE mode. In step S222, the terminal 20 assumes reception of LP-WUS information using the bitmap method or the codepoint method based on the terminal capability information. In step S223, the base station 10 transmits LP-WUS information using the bitmap method or the codepoint method to the terminal 20. The terminal 20 monitors the LP-WUS information transmitted from the base station 10 based on the method used by the assumed LP-WUS, and receives the LP-WUS information.

[0097] For example, the terminal 20 may assume, in the terminal capability, a scheme (bitmap scheme or codepoint scheme) to be applied to the preferred or preferred LP-WUS information. The scheme to be applied to the preferred or preferred LP-WUS information for the terminal 20 may be set as a parameter of the terminal capability. The base station 10 may determine either the bitmap scheme or the codepoint scheme based on the terminal capability indicating the scheme to be applied to the LP-WUS information reported from the terminal 20. The base station 10 may configure or instruct the terminal 20 to use either the bitmap scheme or the codepoint scheme determined based on the terminal capability via the SIB, RRC, MAC CE or DCI.

[0098] The terminal capability may include information indicating the method (bitmap method and / or codepoint method) applied to the LP-WUS information supported by the terminal 20. If the terminal 20 supports both the bitmap method and the codepoint method in the terminal capability, the terminal 20 may operate according to any one of the above examples 2-1, 1-2, or 1-4.

[0099] For example, the terminal 20 may determine a scheme (bitmap scheme or codepoint scheme) to be applied to the LP-WUS information based on the type of LP-WUS receiver included in the terminal capability. The type of LP-WUS receiver may be a type of reception scheme (e.g., OOK-based LR, OFDM-based LR). The type of LP-WUS receiver may be set as a parameter of the terminal capability possessed by the terminal 20. The base station 10 may determine either the bitmap scheme or the codepoint scheme as a scheme to be applied to the LP-WUS information based on the terminal capability indicating the type of LP-WUS receiver reported from the terminal 20. The base station 10 may configure or instruct the terminal 20 to use the bitmap scheme or the codepoint scheme determined based on the terminal capability via the SIB, RRC, MAC CE, or DCI.

[0100] In Example 2-3, the terminal 20 may assume a default value of the method (bitmap method or codepoint method) to be applied to the LP-WUS information based on the terminal capability. That is, a default value of the method to be applied to the LP-WUS information based on the terminal capability may be set for the terminal 20. The default value of the method to be applied to the LP-WUS information based on the terminal capability may be, for example, a value defined in advance by a specification (for example, a 3GPP specification), or may be set or instructed by the base station 10 via the SIB, RRC, MAC CE, or DCI.

[0101] The above-described Example 2-2 and Example 2-3 may be used in combination as shown in Fig. 10. In the example of Fig. 10, in step S231, the state of the terminal 20 may be the RRC IDLE / INACTIVE mode or the terminal 20 may transition to the RRC IDLE / INACTIVE mode.

[0102] In step S232, the terminal 20 transmits terminal capability information to the base station 10. The terminal capability information is at least one of a method (bitmap method and / or codepoint method) applied to LP-WUS information supported by the terminal 20, a method applied to LP-WUS information suitable for the terminal 20, or a type of LP-WUS receiver.

[0103] In step S233, the base station 10 determines the method (bitmap method or codepoint method) to be used by the LP-WUS based on the terminal capability information. In step S234, the base station 10 transmits LP-WUS information using the method determined in step S233 to the terminal 20. In step S235, the base station 10 transmits LP-WUS information using the method determined in step S233 to the terminal 20. The terminal 20 monitors the LP-WUS information transmitted from the base station 10 based on the method used by the assumed LP-WUS, and receives the LP-WUS information.

[0104] (Examples 2-4) According to the second to fourth embodiments, the method (bitmap method or codepoint method) applied to the LP-WUS information based on the terminal capability may be determined based on a predetermined timer.

[0105] FIG. 9 is a sequence diagram showing an example of the operation of the terminal 20 and the base station 10 in Example 2-4. As shown in FIG. 9, in step S241, the state of the terminal 20 is RRC IDLE / INACTIVE mode, or the terminal 20 may transition to RRC IDLE / INACTIVE mode. In step S242, the terminal 20 switches the method (bitmap method or codepoint method) applied to the LP-WUS information based on a predetermined timer. The terminal 20 assumes reception of the LP-WUS information using the switched method. In step S243, the base station 10 transmits LP-WUS information using the bitmap method or the codepoint method to the terminal 20. The terminal 20 monitors the LP-WUS information transmitted from the base station 10 based on the method used by the assumed LP-WUS, and receives the LP-WUS information.

[0106] (Example 2-4-1) According to Example 2-4-1, a switching timer may be defined for switching whether the bitmap method or the codepoint method is set as the default in the terminal 20. The switching timer may be notified to the terminal 20 from the network (base station 10) or may be defined by specifications (e.g., 3GPP specifications).

[0107] (Example 2-4-2) According to Example 2-4-2, a bitmap / codepoint switching timer for switching between the bitmap method and the codepoint method set in the terminal 20 may be defined.

[0108] The default value of the bitmap / codepoint switching timer may be notified to the terminal 20 from the network (base station 10) or may be defined by specifications (for example, 3GPP specifications).

[0109] The bitmap / codepoint switching timer may be determined based on the DRX cycle.

[0110] For example, the validity period "Y" of the bitmap / codepoint switching timer may be determined based on the formula Y = DRX cycle / X. The DRX cycle in this formula may have a different value depending on the IDLE / INACTIVE / CONNECTED mode. "X" may be any value, for example, any of 1, 2, 4, and 8. The value of "X" may be notified to the terminal 20 from the network (base station 10) or may be defined by specifications (for example, 3GPP specifications).

[0111] (Example 2-4-3) In Example 2-4-3, trigger conditions for the switching timers in Examples 2-4-1 and 2-4-2 are defined.

[0112] The trigger for activating the timer function may be, for example, a signal transmitted from the network (base station 10) to the terminal 20, or detection of a change in the SSB index of an RRM (Radio Resource Management) measurement due to a change in beam.

[0113] The trigger for disabling the timer function may be, for example, a signal transmitted from the network (base station 10) to the terminal 20.

[0114] As described above, according to the second embodiment, the terminal 20 in the RRC IDLE / INACTIVE mode can determine (assume) the scheme (e.g., bitmap scheme or codepoint scheme) to be used by the LP-WUS and can perform LP-WUS monitoring based on the determined scheme. Furthermore, according to the second embodiment, it is possible to flexibly switch between multiple schemes used by the LP-WUS.

[0115] (Device configuration) Next, a description will be given of an example of the functional configuration of the base station 10 and the terminal 20 that execute the processes and operations described above. The base station 10 and the terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions of the embodiments.

[0116] <Base station> Fig. 12 is a diagram showing an example of the functional configuration of the base station 10 in this embodiment. As shown in Fig. 12, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 12 is merely an example. The names of the functional divisions and functional units may be any names as long as they can perform the operations according to this embodiment.

[0117] The transmitter 110 includes a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The transmitter 110 also transmits setting information, instructions, notifications, etc. related to a low-power wake-up signal to the terminal 20. The transmitter 110 also transmits notifications related to switching of monitoring operations to the terminal. The receiver 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of higher layers from the received signals. The transmitter 110 also has a function of transmitting PSS, SSS, PBCH, DL / UL control signals, etc. to the terminal 20. The receiver 120 also receives inter-network node messages from other network nodes.

[0118] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information related to measurements of low-power signals.

[0119] As described in the embodiments, the control unit 140 controls settings, instructions, and notifications related to low-power wake-up signals, etc. A functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and a functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.

[0120] <terminal> Fig. 13 is a diagram showing an example of the functional configuration of the terminal 20 in this embodiment. As shown in Fig. 13, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Fig. 13 is merely an example. As long as the operations according to this embodiment can be performed, the names of the functional divisions and functional units may be any. The transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.

[0121] The transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The transmitter 210 also transmits capability information related to the low-power wake-up signal to the base station 10. The receiver 220 receives various signals wirelessly and acquires higher layer signals from the received physical layer signals. The receiver 220 also has a function of receiving PSS, SSS, PBCH, DL / UL / SL control signals, and the like transmitted from the base station 10. The receiver 220 also receives paging notification information and configuration information, instructions, and notifications related to the low-power wake-up signal from the base station 10. For example, the receiver 220 receives the low-power wake-up signal from the base station 10. The configuration unit 230 stores various configuration information received by the receiver 220 from the base station 10. The configuration unit 230 also stores pre-configured configuration information. The configuration information includes, for example, information related to measurements of the low-power signal.

[0122] As described in the embodiments, the control unit 240 controls the settings, instructions, and notifications related to the low-power wake-up signal. The function unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the function unit related to signal reception in the control unit 240 may be included in the receiving unit 220.

[0123] (Hardware configuration) The block diagrams (FIGS. 12 and 13) used in the description of the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the single device or the multiple devices with software.

[0124] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, regard, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0125] For example, the base station 10, the terminal 20, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 14 is a diagram illustrating an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0126] In the following description, the term "apparatus" can be read as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0127] Each function in the base station 10 and the terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001, the memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the memory device 1002 and the auxiliary memory device 1003.

[0128] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0129] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 140 of the base station 10 shown in FIG. 12 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 shown in FIG. 13 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0130] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0131] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0132] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0133] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0134] Furthermore, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0135] Furthermore, base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0136] Fig. 15 shows an example configuration of a vehicle 2001. As shown in Fig. 15, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0137] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0138] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0139] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a front or rear wheel rotation speed signal obtained by a rotation speed sensor 2022, a front or rear wheel air pressure signal obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0140] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various types of information, such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information acquired from external devices via the communication module 2013 or the like to provide various types of multimedia information and multimedia services to the occupants of the vehicle 2001. The information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that output information to the outside.

[0141] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as a millimeter-wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0142] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0143] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0144] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0145] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle-to-vehicle information, etc.) transmitted from external devices and displays it on an information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.

[0146] <Additional notes> (Additional note 1) a receiver configured to monitor for a low-power wake-up signal from a base station; a control unit that determines a scheme to be applied to the low power wake-up signal based on at least one of instruction information from the base station indicating a scheme to be applied to the low power wake-up signal or a terminal capability of the terminal related to a scheme to be applied to the low power wake-up signal, the control unit controls the monitoring based on the determined method; The method is a bitmap method or a code point method.

[0147] (Additional note 2) a transmitting unit that transmits information indicating the terminal capability to the base station; The terminal according to claim 1, wherein the method to be applied to the low power wake-up signal indicated by the instruction information is determined by the base station based on the terminal capabilities.

[0148] (Additional note 3) The terminal described in Supplementary Claim 1, wherein the terminal capability indicates at least one of a method applied to the low power wake-up signal supported by the terminal, a method applied to the low power wake-up signal to be configured in the terminal, or a receiver type of the terminal.

[0149] (Additional note 4) The terminal according to Supplementary Item 1, wherein the terminal is in an RRC (Radio Resource Control) CONNECTD mode.

[0150] (Additional note 5) The terminal according to Supplementary Claim 1, wherein the terminal is in an RRC IDLE / INACTIVE mode.

[0151] (Additional note 6) A communication method performed by a terminal, comprising: performing monitoring for a low power wake-up signal from a base station; determining a scheme to be applied to the low power wake-up signal based on at least one of information indicating a scheme to be applied to the low power wake-up signal from the base station or a terminal capability of the terminal related to a scheme to be applied to the low power wake-up signal; and controlling the monitoring based on the determined method; A communication method, wherein the method is a bitmap method or a code point method.

[0152] All of the above configurations can optimize the reception accuracy, energy efficiency, and communication resources of LP-WUS using OOK modulation. By controlling the information bit allocation method and the number of repetitions using the above configurations, it is possible to achieve low-power, highly reliable LP-WUS communication.

[0153] (Supplementary explanation of the embodiment) Although the present embodiment has been described above, the disclosed invention is not limited to such an embodiment, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; features described in two or more items may be used in combination as needed, and features described in one item may apply to features described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station and terminal have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station according to this embodiment and the software operated by the processor of the terminal according to this embodiment may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

[0154] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0155] Each aspect / embodiment described in the present disclosure may be applied to at least one of a system using LTE (Long Term Evolution), LTE-Advanced (LTE-A), 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-Wide Band), Bluetooth (registered trademark), or other appropriate system, and a next-generation system extended based on these. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A and 5G) may also be applied.

[0156] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

[0157] In this specification, a specific operation that is described as being performed by a base station may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by at least one of the base station and another network node other than the base station (for example, an MME or an S-GW, etc., but are not limited to these). Although the above example illustrates a case where there is one other network node other than the base station, the other network node may be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0158] The information, signals, etc. described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0159] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0160] In the present disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0161] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0162] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0163] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0164] Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0165] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0166] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or other corresponding information. For example, a radio resource may be indicated by an index.

[0167] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0168] In the present disclosure, terms such as "base station (BS)," "radio 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" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0169] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0170] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0171] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0172] A mobile station may also be referred to by those skilled in the art as a 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, handset, user agent, mobile client, client, or some other suitable terminology.

[0173] At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be a mobile object that moves autonomously based on an operational command. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0174] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal may be configured to have the functions of the base station described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0175] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station may be configured to have the functions of the user terminal described above.

[0176] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0177] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0178] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0179] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0180] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0181] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0182] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0183] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0184] Numerology may be communication parameters that apply to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0185] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0186] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0187] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0188] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0189] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each terminal) to each terminal in TTI units. However, the definition of TTI is not limited to this.

[0190] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0191] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0192] A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0193] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0194] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0195] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0196] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0197] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0198] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within the BWP.

[0199] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0200] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0201] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0202] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0203] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0204] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0205] Although the present disclosure has been described in detail above, it is 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 in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0206] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device 2001 Vehicle 2002 Drive unit 2003 Steering Section 2004 accelerator pedal 2005 brake pedal 2006 Shift Lever 2007 front wheel 2008 rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 RPM Sensor 2023 Air Pressure Sensor 2024 Vehicle speed sensor 2025 Acceleration Sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving Assistance Systems Department 2031 microprocessor 2032 memory (ROM, RAM) 2033 Communication port (IO port)

Claims

1. a receiver configured to monitor for a low-power wake-up signal from a base station; a control unit that determines a scheme to be applied to the low power wake-up signal based on at least one of instruction information from the base station indicating a scheme to be applied to the low power wake-up signal or a terminal capability of the terminal related to a scheme to be applied to the low power wake-up signal, the control unit controls the monitoring based on the determined method; The method is a bitmap method or a code point method.

2. a transmitting unit that transmits information indicating the terminal capability to the base station; The terminal according to claim 1 , wherein a scheme to be applied to the low-power wake-up signal indicated by the instruction information is determined by the base station based on the terminal capability.

3. The terminal according to claim 1, wherein the terminal capability indicates at least one of a scheme applied to the low power wake-up signal supported by the terminal, a scheme applied to the low power wake-up signal to be configured in the terminal, or a receiver type of the terminal.

4. The terminal according to claim 1 , wherein the terminal is in a Radio Resource Control (RRC) CONNECTD mode.

5. The terminal of claim 1 , wherein the terminal is in an RRC IDLE / INACTIVE mode.

6. A communication method performed by a terminal, comprising: performing monitoring for a low power wake-up signal from a base station; determining a scheme to be applied to the low power wake-up signal based on at least one of information indicating a scheme to be applied to the low power wake-up signal from the base station or a terminal capability of the terminal related to a scheme to be applied to the low power wake-up signal; and controlling the monitoring based on the determined method; A communication method, wherein the method is a bitmap method or a code point method.

Images