Terminal and communication method

Abstract

To avoid overlap with other signals and allow transmission of low power signals in non-consecutive symbols.SOLUTION: A terminal includes a receiving unit that receives information from a base station indicating that a low-power signal is transmitted in discontinuous symbols, and a control unit that controls receiving processing of the low-power signal in the discontinuous symbols on the basis of the information.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] 3GPP (registered trademark) (3rd Generation Partnership Project) Release 18 (Rel-18) introduced Low-Power Wake-Up Signal (LP-WUS). LP-WUS is a mechanism that uses a low-power, always-operable wake-up receiver (WUR) to determine the presence or absence of paging with minimal reception capabilities.

[0003] The PEI (Paging Early Indication) specified in Rel-17 did not need to consider overlap with UL communications by using a parameter (tdd-UL-DL-ConfigurationCommon) that defines a common scheduling configuration for uplink (UL) and downlink (DL) for TDD (Time Division Duplex) communications. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V18.5.0(2025-03) [Non-patent document 2] 3GPP TS 38.401 V18.5.0(2025-03) Summary of the Invention [Problem to be solved by the invention]

[0005] Since LP-WUS requires time resources over a relatively long period of time, the transmission of LP-WUS, LP-WUS MO (Monitoring Occasion) or LO (LP-WUS Occasion) may overlap with UL signals or other conventional signals, which may result in inefficient use of radio resources and timing misalignment between the network and UE (User Equipment). [Means for solving the problem]

[0006] The terminal in this embodiment includes a receiving unit that receives information from a base station indicating that a low-power signal is transmitted in discontinuous symbols, and a control unit that controls the receiving processing of the low-power signal in the discontinuous symbols based on the information. [Effects of the Invention]

[0007] This embodiment allows low-power signals to be transmitted in discontinuous symbols, avoiding overlap with other signals. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating an example of a wireless communication system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram illustrating an operation procedure of the UE 20 in the first embodiment. [Figure 3] FIG. 10 is a diagram illustrating an example of the configuration of an LP-WUS transmitted in discontinuous symbols in Example 1-2. [Figure 4] FIG. 10 is a sequence diagram showing an example of an operation procedure of the communication system in Example 2-1. [Figure 5] FIG. 10 is a sequence diagram showing an example of an operation procedure of a communication system in Example 2-2. [Figure 6] FIG. 2 is a diagram illustrating an example of a functional configuration of a base station according to the present embodiment. [Figure 7]FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal according to the present embodiment. [Figure 8] FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station or a terminal according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] 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.

[0010] In operation of the wireless communication system of this embodiment, existing technology may be used as appropriate. The existing technology is, for example, existing NR or LTE, but is not limited to existing NR or LTE. Furthermore, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and systems subsequent to LTE-Advanced (e.g., NR) unless otherwise specified.

[0011] Furthermore, in the present embodiment described below, terms used in existing LTE, 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 referred to by other names. Furthermore, the above-mentioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used in NR are not necessarily designated as "NR-".

[0012] Furthermore, 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.).

[0013] Furthermore, in this embodiment, "configuring" radio parameters etc. may mean that predetermined values ​​are pre-configured, or that radio parameters notified from a base station or a terminal are set.

[0014] (System Configuration) Fig. 1 is a diagram for explaining 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.

[0015] 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, and 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. Furthermore, a TTI (Transmission Time Interval) in the time domain may be a slot, or a TTI may be a subframe.

[0016] The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, via the NR-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 via DL (Downlink) and receives control signals or data from the terminal 20 via UL (Uplink). 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 DL or UL. Furthermore, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell) and a primary cell (PCell) using Carrier Aggregation (CA). Furthermore, the terminal 20 may perform communication 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).

[0017] 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. The terminal 20 may be referred to as a UE 20, and the base station 10 may be referred to as a gNB 10.

[0018] The Low-Power Wake Up Signal is called LP-WUS or simply WUS, and the Low-Power Wake Up Receiver is called LP-WUR, WUR, or LR. The LR, a simple circuit that operates with lower power consumption than the Main Radio (MR) used in normal data communications, operates as an alternative to the MR, introducing a state called Ultra-Deep Sleep. The LR may have a function that triggers the power OFF of the MR or the power ON of the MR when it receives an LP-WUS signal.

[0019] In 3GPP Rel-19, the following is being considered for LP-WUS or WUR:

[0020] A LP-WUS may be designed that is commonly applicable to both IDLE and INACTIVE modes and CONNECTED modes. An OOK (OOK-1 and / or OOK-4)-based LP-WUS with an OFDM sequence overlaid on the OOK symbol may be specified. The LP-WUS design shall ensure that the same information is delivered for IDLE and INACTIVE operation regardless of the LP-WUS type, and the OFDM sequence can carry the information. At least duty cycle monitoring of the LP-WUS may be supported.

[0021] In IDLE and INACTIVE modes, LP-WUS procedures and settings may be defined that indicate LP-WUS triggered paging monitoring, including at least the settings, subgrouping, and entry or exit conditions for LP-WUS monitoring.

[0022] In IDLE and INACTIVE modes, an LP-SS with a periodicity of Y ms for the LP-WUR may be specified for serving cell synchronization and / or RRM. The LP-SS is based on OOK-1 and / or OOK-4 waveforms with or without an overlaid OFDM sequence. Further down-selection between those with and without an overlaid OFDM sequence may be performed. Note that for LP-WURs that can receive the existing PSS / SSS, the existing PSS / SSS may be used for synchronization and RRM instead of the LP-SS. Y may be specified, and 320 ms may be supported.

[0023] In IDLE and INACTIVE modes, further RRM relaxations for the UE MR for both serving cell measurements and neighbor cell measurements may be specified, as well as UE serving cell RRM measurements offloaded from the MR to the LP-WUR, including necessary conditions.

[0024] In the CONNECTED mode, procedures may be defined to allow UE MR PDCCH monitoring triggered by LP-WUS, including LP-WUS monitoring activation and deactivation procedures.

[0025] Note that in CONNECTED mode, UE 20 MR ultra-deep sleep is not considered and UE 20 RRM / RLM / BFD / CSI measurements may be performed by the MR. Note that the target coverage of LP-WUS and LP-SS may be the coverage of PUSCH in message 3. Note that optimization of LP-WUS signal design for idle / inactive mode may take priority over optimization for connected mode.

[0026] The PEI specified in 3GPP Rel-17 does not require consideration of overlap with UL communications by using a parameter (tdd-UL-DL-ConfigurationCommon) that defines a common scheduling configuration for uplink (UL) and downlink (DL) for TDD communications.

[0027] On the other hand, since LP-WUS requires time resources over a relatively long period of time, the transmission of LP-WUS, LP-WUS MO (Monitoring Occasion), or LO (LP-WUS Occasion) may overlap with UL signals or other conventional signals, which may result in inefficient use of radio resources or timing misalignment between the network and the UE.

[0028] According to this embodiment, LP-WUS / LP-WUS MO / LO can be transmitted on non-consecutive OFDM symbols to avoid time overlap with UL signals or other legacy signals.

[0029] This embodiment provides a resource allocation method for transmitting LP-WUS / LP-WUS MO / LO on non-consecutive OFDM symbols, which enables efficient utilization of radio resources and prevents timing misalignment between the network (gNB 10) and the UE 20.

[0030] One or more examples of this embodiment will be described below. Each example may be implemented independently, or any combination of examples may be implemented.

[0031] In the following description, LP-WUS / LP-WUS MO / LO means at least one of LP-WUS, LP-WUS MO, or LO.

[0032] In the following description, [X / Y / Z] means at least one of X, Y, and Z.

[0033] In this embodiment, a symbol is an example of a unit of time, such as an OFDM symbol. The unit of time in this embodiment is not limited to a symbol, but may be a slot, a subframe, a frame, or ms.

[0034] Example 1 According to the first embodiment, a predefined definition and rule is provided in a network instruction or specification (3GPP technical specification) regarding LP-WUS / LP-WUS MO / LO transmitted in discontinuous symbols.

[0035] FIG. 2 is a diagram illustrating an example of an operation procedure of the UE 20 according to the first embodiment.

[0036] In step S11, the UE 20 recognizes that the LP-WUS / LP-WUS MO / LO are transmitted in discontinuous symbols based on instructions from the gNB 10 or predefined specifications.

[0037] In step S12, the UE 20 performs reception processing on the discontinuous symbols in which the LP-WUS / LP-WUS MO / LO are transmitted.

[0038] (Example 1-1) Some or all of the following information may be used by the UE 20 to determine whether the LP-WUS / LP-WUS MO / LO are transmitted in non-consecutive symbols:

[0039] A) The UE 20 may determine whether the LP-WUS / LP-WUS MO / LO are transmitted in discontinuous symbols based on the signals and channels of A-1) to A-5) below.

[0040] A-1) UL symbol / slot The UL symbols / slots include, for example, UL symbols / slots resulting from the TDD configuration, flexible slots / symbols configured and designated for UL, and SBFD slots / symbols configured and designated for UL.

[0041] A-2) Cell-specific DL channel and RS (Reference Signal) The cell-specific DL channels and RSs include, for example, SSB, TRS, PO (Paging Occasion), and PEI-O. The TRS is, for example, a dedicated TRS for idle mode. The PO is, for example, a PDCCH monitoring opportunity for paging that overlaps with the LP-WUS in the frequency domain with or without a guard band. The PEI-O is, for example, a PDCCH monitoring opportunity for PEI that overlaps with the LP-WUS in the frequency domain with or without a guard band.

[0042] A-3) Rate matching with UE-specific DL channel and RS The UE-specific DL channel and rate matching with the RS includes, for example, the PDCCH of other UEs 20 and the PDSCH of other UEs 20 .

[0043] A-4) Low power signal Low power signals include, for example, LP-SS.

[0044] A-5) Other signals B) The UE 20 may determine whether the LP-WUS / LP-WUS MO / LO are transmitted in non-consecutive symbols based on the reserved resources, e.g., the UE 20 may be signaled or configured with reserved resources indicating that the LP-WUS / LP-WUS MO / LO transmitted in non-consecutive OFDM symbols must not overlap.

[0045] For example, the reserved resources may be the reserved resources of the first n OFDM symbols of a slot, which may be used for PDCCH transmission.

[0046] For example, the reserved resources may be the last m OFDM symbols of a slot, which may be used for PUCCH or SRS transmission.

[0047] Based on some or all of the above information and other possible information shown in Examples 1-2 and 2, UE 20 predicts that gNB 10 will transmit LP-WUS / LP-WUS MO / LO in discontinuous symbols.

[0048] (Example 1-2) The UE 20 may assume a predetermined rule for receiving [LP-WUS / LP-WUS MO / LO] transmitted in non-consecutive OFDM symbols and perform operations based on this assumption. The rule may also be referred to as a constraint, a condition, a definition, or a configuration. The predetermined rule may be predefined in a specification (e.g., a 3GPP technical specification), pre-configured in the UE 20, or instructed by the network (e.g., the gNB 10). The UE 20 may be permitted to receive [LP-WUS / LP-WUS MO / LO] transmitted in non-consecutive OFDM symbols. The predetermined rule may be, for example, one or any combination of the following a) to e):

[0049] a) The maximum number of gaps present in a [LP-WUS / LP-WUS MO / LO] transmission must not exceed N_gap_max.

[0050] N_gap_max may be predefined or configured for the UE 20. [LP-WUS / LP-WUS MO / LO] The number of gaps in a transmission shall not exceed N_gap_max.

[0051] Gaps in the LP-WUS may cause discontinuous LP-WUS transmission, e.g., if N_gap_max = 1, then at most one gap is allowed during LP-WUS transmission.

[0052] b) There may be a guard gap of L_guard_gap between the symbols of the LP-WUS transmission and the signal / channel in Example 1-1.

[0053] L_guard_gap is the guard gap between one of the non-consecutive symbols for LP-WUS transmission and the symbol for UL / legacy NR DL transmission, as shown in Figure 3. L_guard_gap may be predefined or configured for the UE 20.

[0054] c) The length of one gap in a [LP-WUS / LP-WUS MO / LO] transmission must not exceed L_a_gap_max.

[0055] L_a_gap_max is the maximum gap between one symbol and another symbol among non-consecutive symbols for LP-WUS transmission, as shown in Figure 3. The unit of L_a_gap_max may be [symbol / slot / subframe / frame / ms]. L_a_gap_max may be predefined or configured for the UE 20.

[0056] d) The total length of all gaps in a [LP-WUS / LP-WUS MO / LO] transmission must not exceed L_all_gap_max, which is the maximum total length of all gaps in a [LP-WUS / LP-WUS MO / LO] transmission.

[0057] The unit of L_all_gap_max may be [symbol / slot / subframe / frame / ms]. L_all_gap_max may be predefined or configured for the UE 20.

[0058] e) The total length of [LP-WUS / LP-WUS MO / LO] must not exceed L_LPWUS_max, which is the maximum total length of [LP-WUS / LP-WUS MO / LO].

[0059] L_LPWUS_max is the total length of the LP-WUS transmitted in non-consecutive symbols as shown in Figure 3. The unit of L_LPWUS_max may be [symbol / slot / subframe / frame / ms]. L_LPWUS_max may be predefined or configured for the UE 20.

[0060] There may be separate parameters (N_gap_max / L_guard_gap / L_a_gap_max / L_all_gap_max / L_LPWUS_max) for the LP-WUS, the LP-WUS MO, and the LO, respectively. For example, N_gap_max, L_guard_gap, and L_a_gap_max may be applied to the LP-WUS, and L_a_gap_max and L_all_gap_max may be applied to the LP-WUS MO.

[0061] The length of the LP-WUS / LP-WUS MO / LO may include:

[0062] - Duration of the gap during the LP-WUS period - Duration of the gap between LP and WUS - Duration of the gap from the start of the MO to the start of the first LP-WUS within the MO - the duration of the gap between the end of the last LP-WUS in the MO and the end of the MO - Duration of the gap between LP and WUS MO - Duration of the gap from the start of the LO to the start of the first LP-WUS within the LO - the duration of the gap from the end of the last LP-WUS in the LO to the end of the LO The UE 20 may assume one or more of a) to e) above when receiving [LP-WUS / LP-WUS MO / LO] in non-consecutive OFDM symbols.

[0063] The UE 20 may determine the [start / end / occasion / duration] of the [LP-WUS / LP-WUS MO / LO] based on one or more of a) to e) above.

[0064] The gNB 10 may notify the above parameters, for example, N_gap_max / L_guard_gap / L_a_gap_max / L_all_gap_max / L_LPWUS_max, to the UE 20. These parameters may be included in, for example, at least one of RRC, SIB1, or other SIB types.

[0065] Different predetermined rules may be applied depending on the state of the UE 20. Different parameter (N_gap_max / L_guard_gap / L_a_gap_max / L_all_gap_max / L_LPWUS_max) values ​​may be applied depending on the state of the UE 20. For example, the rule a) N_gap_max = 2 may be applied to a UE 20 in an RRC_IDLE / INACTIVE state. For example, the rules "N_gap_max = 2 in a)" and "L_LPWUS_max = 5 slots in f)" may be applied to a UE 20 in an RRC_CONNECTED state.

[0066] "Not exceeding" (or "less than") the above parameters may be interpreted as being equal to or less than the above parameters.

[0067] (Examples 1-3) According to Examples 1-3, when [LP-WUS / LP-WUS MO / LO] transmitted in discontinuous OFDM symbols overlaps with other signals in the time domain or frequency domain, any of the following constraints 1) to 3) may be applied.

[0068] Constraint 1) [LP-WUS / LP-WUS MO / LO] transmitted in discontinuous OFDM symbols can overlap with other signals in the time domain, but cannot overlap in the frequency domain.

[0069] Constraint 2) [LP-WUS / LP-WUS MO / LO] transmitted in discontinuous OFDM symbols can overlap with other signals in the frequency domain, but cannot overlap in the time domain.

[0070] Constraint 3) [LP-WUS / LP-WUS MO / LO] transmitted in discontinuous OFDM symbols cannot overlap with other signals in either the time domain or the frequency domain.

[0071] Example 2 In Example 2, another example for determining whether LP-WUS / LP-WUS MO / LO are transmitted in discontinuous symbols will be described.

[0072] Example 2-1 According to Example 2-1, as shown in step S21 of Fig. 4, the UE 20 may transmit capability information indicating whether the UE 20 supports reception of LP-WUS / LP-WUS MO / LO transmitted in discontinuous symbols to the gNB 10. The capability information is, for example, UE capability. The capability information may include, for example, the following options:

[0073] Option 1: Information indicating support for reception of LP-WUS transmitted in non-consecutive OFDM symbols Option 2: Information indicating support for reception of LP-WUS MO transmitted in non-consecutive OFDM symbols The information in Option 2 may include information indicating that gaps exist between LP-WUSs in an LP-WUS MO, i.e., that the LP-WUSs in an LP-WUS MO are supported to be transmitted in non-consecutive OFDM symbols. The information in Option 2 may include information in Option 2-1 and / or 2-2 below.

[0074] Option 2-1: Information indicating support for each LP-WUS in the LP-WUS MO being transmitted in consecutive OFDM symbols Option 2-2: Information indicating support for each LP-WUS in the LP-WUS MO being transmitted in non-consecutive OFDM symbols, as in Option 1 Option 3: Information indicating support for reception of LOs transmitted in non-consecutive OFDM symbols The information in Option 3 may include information indicating support for gaps between LP-WUS MOs in a LO, i.e., support for LP-WUS MOs in a LO being transmitted in non-consecutive OFDM symbols. The information in Option 3 may include information in Option 3-1 and / or 3-2 below.

[0075] Option 3-1: Information indicating support for each LP-WUS MO in a LO being transmitted in consecutive OFDM symbols Option 3-2: Information indicating support for each LP-WUS MO in a LO being transmitted in non-consecutive OFDM symbols, as in Option 2 (Example 2-2) According to Example 2-2, as shown in step S31 of Fig. 5, the gNB 10 may transmit information (parameters) indicating whether to transmit LP-WUS / LP-WUS MO / LO in discontinuous OFDM symbols to the UE 20. This information may include parameters of higher layers, SIB1 and / or other SIB types.

[0076] (Example 2-2-1) The parameter may indicate whether the LP-WUS is transmitted in non-consecutive OFDM symbols (ie, whether the transmission operation of Option 1 is performed).

[0077] For example, if a parameter is set or present in a signal transmitted from the gNB 10 to the UE 20, the UE 20 may assume that the gNB 10 can transmit the LP-WUS in non-consecutive OFDM symbols. On the other hand, if a parameter is not set or present in a signal transmitted from the gNB 10 to the UE 20, the UE 20 may assume that the gNB 10 cannot transmit the LP-WUS in non-consecutive OFDM symbols.

[0078] (Example 2-2-2) The parameter may indicate whether the LP-WUS MO is transmitted in discontinuous OFDM symbols (whether the transmission operation of Option 2 is performed). For example, the parameter may indicate one of the following:

[0079] - gNB 10 transmits LP-WUS as transmission behavior of Option 2-1 - gNB 10 transmits LP-WUS as transmission behavior of Option 2-2 - Does not support LP-WUS MO transmitted in non-consecutive OFDM symbols (Example 2-2-3) The above parameter may indicate whether the LO is transmitted in discontinuous OFDM symbols (whether the transmission operation of Option 3 is performed). For example, the parameter may indicate one of the following:

[0080] - gNB 10 transmits LP-WUS as transmission behavior of Option 3-1 - gNB 10 transmits LP-WUS as transmission behavior of Option 3-2 (each LP-WUS MO follows Option 2-2) - gNB 10 transmits LP-WUS as transmission behavior of Option 3-3 (each LP-WUS MO follows Option 2-1) - Does not support LP-WUS MO transmitted in non-consecutive OFDM symbols Some or any combination of the above parameters may be used.

[0081] The UE 20 may report the following capabilities:

[0082] Ability to indicate whether or not each of the above actions is supported Ability to indicate whether each option for each of the above operations is supported, or whether a combination of options is supported.

[0083] Ability to indicate whether or not each option (Alt) for each of the above actions is supported, or whether or not a combination of options is supported.

[0084] The UE 20 can report the above capabilities per frequency. The UE 20 may also report capabilities per UE 20, per FR, per FR1, per FR2, per FR2-1, per FR2-2, per SCS, per band, per Band Combination (BC), per Feature set combination (FC), or per feature set per component carrier (FSPC).

[0085] The UE 20 may report the above capabilities on a cell-by-cell basis. The UE 20 may also report capabilities on a per-UE 20 basis, per-cell basis, or per TDD and FDD basis.

[0086] Throughout the above operations, whether and which operations are applied and / or which options or alternatives are used may be determined by the following:

[0087] Set by upper layer parameters.

[0088] Determined by relevant higher layer parameters.

[0089] Notified by MAC-CE or DCI.

[0090] Determined based on UE 20 capabilities.

[0091] - Determined based on the description of the operation above.

[0092] -Determined based on the conditions described in the above operation.

[0093] Determined by higher layer parameters, MAC-CE, DCI configuration and reported UE 20 capabilities (combination of the above decisions).

[0094] Throughout the above operations, multiple options and alternatives (Alt) can also be combined into one option or alternative.

[0095] The UE 20 may receive information from the network as the following types: The network may be referred to as a BS or a gNB.

[0096] Information via higher layer signaling (e.g., RRC messages, LPP (LTE Positioning Protocol) messages) MAC-CE - MAC-CE with new LCID in subheader - Extending an existing MAC-CE (e.g., introducing a new octet).

[0097] DCI -DCI Field: Existing DCI field or newly introduced DCI field RNTI: DCI with CRC scrambled by an existing RNTI or a newly introduced RNTI -DCI format: existing DCI format or newly introduced DCI format Combination of the above information The UE 20 may receive information from the network at the following periodic types:

[0098] Opt1: Periodic Opt2: Semi-persistent (triggered by UE 20 or gNB indication) Opt3: Aperiodic (triggered by UE 20 or gNB indication) (Device configuration) Next, a description will be given of an example of the functional configuration of the base station (gNB 10) 10 and the terminal (UE 20) 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.

[0099] <Base station (gNB)> Fig. 6 is a diagram showing an example of the functional configuration of the base station 10 in this embodiment. As shown in Fig. 6, 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. 6 is merely an example. The names of the functional divisions and functional units may be any as long as they can perform the operations in this embodiment. The transmitting unit 110 and the receiving unit 120 may be collectively referred to as a communication unit.

[0100] 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.

[0101] 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 on the operations explained in the embodiments.

[0102] The control unit 140 controls the settings, instructions, and notifications related to the operations described in the embodiments. The function unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the function unit related to signal reception in the control unit 140 may be included in the receiving unit 120.

[0103] <Device (UE)> Fig. 7 is a diagram showing an example of the functional configuration of the terminal 20 in this embodiment. As shown in Fig. 7, 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. 7 is merely an example. The names of the functional divisions and functional units may be any as long as they can execute the operations in this embodiment. The transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.

[0104] The transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The transmitter 210 also transmits capability information in a low-power wake-up signal to the base station 10. The receiver 220 wirelessly receives various signals 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, etc. transmitted from the base station 10. The receiver 220 also receives paging notification information and setting information, instructions, and notifications related to the low-power wake-up signal from the base station 10. For example, the receiver 220 receives a low-power wake-up signal from the base station 10. The setting unit 230 stores various setting information received by the receiver 220 from the base station 10. The setting unit 230 also stores setting information that is set in advance. The content of the setting information is, for example, information on the operations described in the embodiments.

[0105] As described in the embodiments, the control unit 240 controls settings, instructions, and notifications related to the operations described in the embodiments. A functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and a functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.

[0106] (Hardware configuration) The block diagrams (FIGS. 6 and 7) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by hardware, software, or a combination of these. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically coupled, or may be realized by using two or more physically or logically separated devices that are connected directly or indirectly (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the one device or the multiple devices with software.

[0107] For example, a base station, a terminal, a network node, 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. 8 is a diagram illustrating an example of the hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. The above-described base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0108] In the present disclosure, the term "apparatus" may be interchangeable with any two terms selected from a set of terms such as circuit, device, unit, module, chip, means, etc. The hardware configurations of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0109] 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, memory 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls the reading, writing, or both reading and writing of data in the memory 1002 and storage 1003.

[0110] The processor 1001, for example, runs an operating system to control the entire computer. 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, a baseband signal processing unit, a call processing unit, etc. may be realized by the processor 1001. Although only one processor 1001 is shown in the figure, there may be multiple processors.

[0111] The processor 1001 also reads programs (program codes), software modules, data, etc. from the storage 1003, the communication device 1004, or both the storage 1003 and the communication device 1004 into the memory 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 401 of the terminal 20 may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks. While the above-described various processes have been described as being executed by a single 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, or may be provided to the computer via the communication device 1004, for example.

[0112] The present disclosure also provides a computer program product including a computer program, which may implement the steps of the methods described in the above embodiments when the computer program is executed by a computer (e.g., the processor 1001).

[0113] The memory 1002 is a computer-readable recording medium and may be configured, for example, as a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or a combination of at least two of these. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), or the like. The memory 1002 can store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0114] Storage 1003 is a computer-readable recording medium, and may be, for example, 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, or a combination of at least two of these. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned storage medium may be, for example, memory 1002, storage 1003, or a database, server, or other appropriate medium including both memory 1002 and storage 1003.

[0115] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via a wired network, a wireless network, or both wired and wireless networks, 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, or a combination of at least two of these. For example, a transmitting / receiving antenna, an amplifier unit, a transmitting / receiving unit, or a transmission path interface may be realized by the communication device 1004. The transmitting / receiving unit may be implemented as a transmitting unit and a receiving unit that are physically or logically separated.

[0116] The input device 1005 is an input device that accepts input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, or a combination of at least two of these). The output device 1006 is an output device that outputs to the outside (for example, a display, a speaker, an LED lamp, or a combination of at least two of these). The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0117] Furthermore, each device, such as the processor 1001 and the memory 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.

[0118] 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), a field programmable gate array (FPGA), a graphics processing unit (GPU), a neural processing unit (NPU), or a combination of at least two of these, 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.

[0119] <Additional notes> (Additional note 1) a receiver for receiving information from a base station indicating that a low power signal is to be transmitted in discontinuous symbols; a control unit that controls a receiving process of the low-power signal in the discontinuous symbols based on the information.

[0120] (Additional note 2) The terminal according to claim 1, wherein the low power signal is at least one of an LP-WUS (Low Power Wake-Up Signal), an LP-WUS MO (Monitoring Occasion), or an LO (LP-WUS Occasion).

[0121] (Additional note 3) the number of gaps between a first symbol and a second symbol of the non-consecutive symbols does not exceed a predetermined number; 2. The terminal of claim 1, wherein a guard gap between one of the discontinuous symbols for transmitting the low-power signal and a symbol for transmitting or receiving another signal does not exceed a predetermined guard gap length.

[0122] (Additional note 4) the length of the gap between the first symbol and the second symbol does not exceed a predetermined maximum value; the total length of the gaps between the symbols included in the non-consecutive symbols does not exceed a predetermined maximum value; 4. The terminal of claim 3, wherein the total length of the low-power signal transmitted in the discontinuous symbols does not exceed a predetermined maximum value.

[0123] (Additional note 5) A communication method performed by a terminal, comprising: a receiver for receiving information from a base station indicating that a low power signal is to be transmitted in discontinuous symbols; a control unit that controls a receiving process of the low-power signal in the discontinuous symbols based on the information.

[0124] Any of the above configurations allows for the transmission of low power signals in non-consecutive symbols, avoiding overlap with other signals.

[0125] (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; matters described in two or more items may be used in combination as needed, and matters described in one item may apply to matters 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 the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 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 10 according to this embodiment and the software operated by the processor of the terminal 20 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.

[0126] The aspects / embodiments described in the present disclosure may be categorized as Long Term Evolution (LTE), LTE-Advanced (LTE-A), International Mobile Telecommunications-Advanced (IMT-Advanced), 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G-Advanced (5G-A), 6th generation mobile communication system (6G), xth generation mobile communication system (x is, for example, an integer or a decimal number)), Future Radio Access (FRA), New Radio (NR), New radio access (NX), Future generation radio access (FX), Open Radio Access Network (O-RAN), Wideband Code Division Multiple Access (W-CDMA) (registered trademark), Global System for Mobile communications (GSM) (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) Engineers) 802.11, IEEE802.11x (where x is any character string such as b, a, g, n, ac, ax, be, or bn, and when x=n it is called Wi-Fi4, when x=ac it is called Wi-Fi5, when x=ax it is called Wi-Fi6 or Wi-Fi6E, when x=be it is Wi-Fi7, and when x=bn it is called Wi-Fi8, etc. Wi-Fi is a registered trademark.), IEEE802.16 (WiMAX (registered trademark), IEEE802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), network virtualization technology (e.g., NFV (Network Function Virtualization), SFC (Service Function Chaining), SDN (Software Defined Networking)), or LPWA (Low Power Wide Area). Furthermore, each aspect / embodiment described in the present disclosure may be applied to a system based on a combination of at least two of these technologies. Furthermore, "based on" naturally refers not only to a system that uses the technology, but also to a system that uses an extension or modification of the technology.

[0127] In the present disclosure, any two terms selected from a set of terms such as "base station (BS)", "radio base station", "fixed station (fixed station)", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point (AP)", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "radio unit (RU)", "remote unit (RU)", "control unit (CU)", "distributed unit (DU)", "remote radio head (RRH)", "node", "gateway", "terrestrial base station", "stratospheric base station", "unmanned aerial vehicle", "high altitude platform station (HAPS)", "airborne platform", "panel", "cell", "radio access network (RAN)", and "network" may be used interchangeably.

[0128] Each cell accommodated by a base station may be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, a serving cell, or a super cell. In the present disclosure, any two terms selected from a set of terms such as "cell," "sector," "cell group," "carrier," "component carrier," "cluster," "bandwidth part (BWP)," and "carrier bandwidth" may be used interchangeably.

[0129] In the present disclosure, any two terms selected from the set of terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE 20)", "Device", "Module" and "Terminal" may be used interchangeably.

[0130] A terminal may be referred to 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, router (e.g., home router, mobile router, etc.), TCU (Telematics Control Unit), or some other suitable terminology.

[0131] The base station and the terminal may each be composed of one or more devices. The devices constituting at least a portion of the base station and the terminal may be called a transmitting device, a receiving device, a communication device, etc. Note that the devices constituting at least a portion of the base station and the terminal may be, for example, an object itself, such as a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, an excavator, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcar, a rickshaw, a ship and other watercraft, an airplane, a rocket, an unmanned aerial vehicle, a stratospheric base station (e.g., a High Altitude Platform Station (HAPS)), an artificial satellite (e.g., a Low Earth Orbit (LEO) satellite, a Medium Earth Orbit (MEO) satellite, a Geostationary Earth Orbit (GEO) satellite), a drone (registered trademark), a multicopter, a quadcopter, a balloon, or an Internet of Things (IoT) device (e.g., a smart meter, a sensor), or may include, but are not limited to, an object or device mounted on the object. Furthermore, the object may be a moving object (hereinafter referred to as a "moving object"; this does not exclude the case where the moving object is in a stationary state where it is not moving), or may be a fixedly positioned object (hereinafter referred to as a "non-moving object").

[0132] Furthermore, a base station in the present disclosure may be read as a 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 terminal is replaced with communication between multiple terminals (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)) or communication of a non-terrestrial network (NTN). In this case, the terminal 20 may be configured to have at least some of the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "sidelink") or terms corresponding to NTN (for example, feeder link or service link). For example, an uplink channel or a downlink channel may be read as a sidelink channel.

[0133] The present disclosure is also applicable to cases where at least some of the devices constituting the base station and the terminal operate outside the earth (for example, in the atmosphere or outer space).

[0134] In addition, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station 10 may be configured to have the functions of the terminal 20 described above.

[0135] 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) and 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) and System Information Block (SIB))), other signals, or a combination of at least two of these. Note that the physical layer signaling may be referred to as Layer 1 (L1) control information. The MAC signaling may be referred to as a MAC Control Element (CE) or a MAC Protocol Data Unit (PDU), for example. Furthermore, the RRC signaling may be referred to as an RRC message or an information element (IE) in the RRC message. The RRC message may be, for example, a message used for controlling an RRC connection (for example, setup, reconfiguration, establishment, reestablishment, release, or resume), mobility, a measurement report, or notification of a terminal's capabilities, or may be an information element within the message. Furthermore, notification of information may be explicit or implicit. Note that explicit notification of certain information means notification of the certain information itself, and implicit notification of certain information may mean notification of information other than the certain information, or may mean that the certain information is considered to have been notified when a certain condition is satisfied.Furthermore, notification of information may include not only notification between the same layers of different devices (e.g., between a lower layer or an upper layer of the base station 10 and the terminal 20) but also notification between different layers in the same or different devices (e.g., between a lower layer and an upper layer in the base station 10 or the terminal 20). Furthermore, notification of information from one device to another device may be performed via one or more devices. Regarding any information (e.g., a variable, a constant, a parameter, a setting) described in the present disclosure, even if not specifically stated in the above embodiments, information indicating / specifying (or related to) the any information (value) may be notified from any first device (e.g., a terminal / base station) to any second device (e.g., a base station / terminal).

[0136] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure 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.

[0137] In the present disclosure, a specific operation described as being performed by a base station may be performed by its upper node or by some of its upper nodes (e.g., CU, RU, or DU, etc.) in some cases. It is clear that various operations performed for communication with a terminal in a RAN or core network may be performed by at least some of the base station and other network nodes other than the base station. The other network node may be one node or a combination of multiple nodes. The network node is, for example, a node provided in various core networks such as EPC (Evolved Packet Core) and 5GC (5G Core Network), and provides one or more network functions (NF: Network Functions), but is not limited to this.

[0138] Furthermore, in the present disclosure, the operation of "a terminal receives information from a base station" accompanies the operation of "the base station transmits the information to the terminal," "the base station generates the information," or both. Similarly, the operation of "a terminal transmits information to a base station" accompanies the operation of "the base station receives the information from the terminal." Furthermore, the operation of "the terminal is configured to ..." or "configure UE 20 to ..." may include the operation of "the base station transmits configuration information regarding the configuration of the terminal" and the operation of "the terminal configures a predetermined operation based on the configuration information."

[0139] Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched depending on the implementation.

[0140] The present disclosure has been described above, but it is for illustrative purposes only, and the present invention is not limited to the aspects / embodiments described in the present disclosure. The present disclosure can be implemented in modified and altered forms without departing from the spirit of the invention. The present disclosure and its modifications and alterations are included in the scope of the present invention and its equivalents.

[0141] 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.

[0142] The radio resource may be defined by a combination of resource units in one or more domains, such as the time domain, the frequency domain, the spatial domain, the code domain, and the power domain.

[0143] For example, resources in the time domain may be defined by one or more time units. The one or more time units may include, but are not limited to, a radio frame, a subframe, a slot, a symbol, a transmission time interval (TTI), or a combination of at least two of these. The time unit may be a fixed-length time unit independent of numerology, a variable-length time unit dependent on numerology, or both. Examples of fixed-length time units include, but are not limited to, a subframe consisting of one or more slots and a radio frame including multiple subframes. Examples of variable-length time units include, but are not limited to, a symbol and a slot including a fixed number of symbols. A certain time unit may be divided into shorter time units. Examples of shorter time units include, but are not limited to, a minislot consisting of fewer symbols than the number of symbols constituting a slot. The above-described time units may include, for example, time units used as units for scheduling, link adaptation, etc. Furthermore, any time unit in the present disclosure may be read as another time unit.

[0144] Numerology is a parameter that defines the physical layer structure, and may be a parameter based on at least one of subcarrier spacing (SCS), symbol length, cyclic prefix length, and sampling time, for example.

[0145] Resources in the frequency domain may be defined, for example, by one or more frequency units. The one or more frequency units may include, for example, subcarriers, resource blocks (RBs), bandwidth parts (BWPs), carrier bandwidths, or a combination of at least two of these, but the terminology of the frequency units is not limited to these. The number of subcarriers included in a frequency unit may be a fixed number regardless of numerology, or may be a variable number that changes depending on numerology. For example, an RB is composed of a predetermined number of consecutive subcarriers in the frequency domain, and the number of subcarriers included in the RB may be the same regardless of numerology, for example, 12, but is not limited to this. A BWP may be composed of, for example, one or more consecutive RBs within a certain carrier bandwidth, but is not limited to this. One or more BWPs may be configured within one carrier for terminal 20, and at least one of the BWPs may be activated. Any frequency unit in the present disclosure may be interchangeable with another frequency unit.

[0146] Furthermore, resources in both the time domain and the frequency domain may be defined by one or more time / frequency units each consisting of a time unit and a frequency unit, such as, but not limited to, a resource element (RE) consisting of one symbol and one subcarrier, a resource element group (REG) consisting of a predetermined number of REs, or a control resource set (CORESET) consisting of a predetermined number of symbols and a predetermined number of RBs.

[0147] Furthermore, resources in the spatial domain may be defined, for example, by one or more spatial units, including, but not limited to, a beam, a layer of MIMO (Multi-Input Multi-Output), an antenna port, or a combination of at least two of these.

[0148] Furthermore, the resources in the code domain may be defined by one or more code units, such as, but not limited to, a cyclic shift (CS), an orthogonal cover code (OCC), or a combination thereof.

[0149] 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.

[0150] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc. [Explanation of symbols]

[0151] 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

Claims

1. a receiver for receiving information from a base station indicating that a low power signal is to be transmitted in discontinuous symbols; a control unit that controls a receiving process of the low-power signal in the discontinuous symbols based on the information.

2. The terminal according to claim 1 , wherein the low-power signal is at least one of a Low Power Wake-Up Signal (LP-WUS), a Monitoring Occasion (LP-WUS MO), or a LP-WUS Occasion (LO).

3. the number of gaps between a first symbol and a second symbol of the non-consecutive symbols does not exceed a predetermined number; 2. The terminal of claim 1, wherein a guard gap between one of the non-consecutive symbols for transmission of the low-power signal and a symbol for transmission or reception of another signal does not exceed a predetermined guard gap length.

4. the length of the gap between the first symbol and the second symbol does not exceed a predetermined maximum value; the total length of the gaps between the symbols included in the non-consecutive symbols does not exceed a predetermined maximum value; The terminal of claim 3 , wherein the total length of the low-power signal transmitted in the non-consecutive symbols does not exceed a predetermined maximum value.

5. A communication method performed by a terminal, comprising: a receiver for receiving information from a base station indicating that a low power signal is to be transmitted in discontinuous symbols; a control unit that controls a receiving process of the low-power signal in the discontinuous symbols based on the information.

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