Terminal device, terminal device method, and base station device

Abstract

A terminal device (10) comprises: a control unit (110); and a communication unit 120 that is controlled by the control unit (110) so as to perform wireless communication. The control unit (110) uses a formula containing a correction value for a System Frame Number (SFN) to execute, via the communication unit (120), a periodic operation for transmission or reception.

Description

[Technical Field]

[0001] This application is based on and claims the benefit of priority from Japanese Application No. 2022-099929, filed on June 21, 2022, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to a terminal device, a terminal device method, and a base station device. [Background technology]

[0003] In recent years, technological development related to extended reality (XR) has progressed. XR is a concept that includes multimedia integration technologies such as virtual reality (VR), augmented reality (AR), mixed reality (MR), and substitutional reality (SR). In XR, 3D time-series image data in real and / or virtual spaces, multi-channel audio data (stereo, 5.1ch, etc.), other data presented to the user, control data, etc. are transmitted and received in parallel. XR requires low latency and high reliability to maintain and improve the quality of the user experience.

[0004] Non-Patent Document 1 discusses the implementation of XR in 5G NR (Fifth Generation New Radio), a wireless specification defined by the Third Generation Partnership Project (3GPP (registered trademark)). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] 3GPP TR 38.838 V17.0.0 (2021-12) [Non-patent document 2] 3GPP TS 38.321 V17.0.0 (2022-03) [Non-patent document 3] 3GPP TS 38.213 V17.0.0 (2021-12) Summary of the Invention

[0006] In the above-mentioned XR implementation study, enhancements to scheduling methods such as configured grant (CG) and semi-persistent scheduling (SPS) are being considered.

[0007] For example, Non-Patent Document 2 describes a formula for CG, which is used to determine the timing at which a terminal device performs a periodic transmission operation. Furthermore, Non-Patent Document 2 describes a formula for SPS, which is used to determine the timing at which a base station device performs a periodic transmission operation. Furthermore, Non-Patent Document 3 describes a formula for scheduling request (SR), which is used to determine the timing at which a terminal device performs a periodic transmission operation. The above formula includes a system frame number (SFN). The inventor discovered a problem that when such a formula is used, the periodicity value set causes the operation period to not be maintained constant when the SFN is updated to its initial value (i.e., 0). The inventor also discovered that this problem also occurs in ordinary terminal devices and base station devices other than those implementing XR.

[0008] The present disclosure provides a technique that can appropriately control the operation cycle of a terminal device or a base station device.

[0009] A terminal device according to one embodiment of the present disclosure includes a control unit and a communication unit configured to perform wireless communication under the control of the control unit, and the control unit is configured to perform periodic transmission or reception operations via the communication unit using a mathematical formula including a correction value for a system frame number (SFN).

[0010] Furthermore, a method of a terminal device in one aspect of the present disclosure includes determining whether a mathematical formula including a correction value for the SFN holds, and if the mathematical formula holds, performing a periodic operation of transmission or reception.

[0011] Furthermore, a base station device according to one embodiment of the present disclosure includes a control unit and a communication unit configured to perform wireless communication by being controlled by the control unit, and the control unit is configured to perform a periodic operation of transmission or reception via the communication unit using a mathematical formula including a correction value for a system frame number (SFN).

[0012] According to the above configuration, it is possible to appropriately control the operation cycle of the terminal device or the base station device. Note that the above configuration may achieve other effects instead of or in addition to the above effect. [Brief explanation of the drawings]

[0013] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: [Figure 1] FIG. 1 is a diagram showing a communication system S according to a first embodiment. [Figure 2] FIG. 2 is a diagram showing a protocol stack of a U-plane according to the first embodiment; [Figure 3]FIG. 3 is a diagram showing a C-plane protocol stack according to the first embodiment; [Figure 4] FIG. 4 is a block diagram showing a schematic hardware configuration of the terminal device 10 according to the first embodiment. [Figure 5] FIG. 5 is a block diagram illustrating a schematic functional configuration of a terminal device 10 according to an embodiment. [Figure 6] FIG. 6 is a block diagram showing a schematic hardware configuration of the base station device 20 according to the first embodiment. [Figure 7] FIG. 7 is a block diagram illustrating a schematic functional configuration of a base station device 20 according to the embodiment. [Figure 8] FIG. 8 is a diagram showing a radio frame configuration according to the first embodiment; [Figure 9] FIG. 9 is a diagram showing three radio resource control (RRC) states that the terminal device 10 according to the first embodiment can take. [Figure 10] FIG. 10 is a schematic explanatory diagram of discontinuous reception (DRX) in the first embodiment; [Figure 11] FIG. 11 is a diagram showing the relationship between the timing at which a signal arrives at a terminal device and the start timing of a DRX on period; [Figure 12] FIG. 12 is a sequence diagram showing a flow of DRX processing in the first embodiment. [Figure 13] FIG. 13 is a diagram showing the relationship between the timing at which a signal arrives at the terminal device 10 when the configuration in the first embodiment is applied and the start timing of the DRX on period. [Figure 14] FIG. 14 is a flowchart showing a process flow of formula selection in a first mode of long DRX; [Figure 15] FIG. 15 is a flowchart showing a process flow of formula selection in a second mode of long DRX; [Figure 16] FIG. 16 is a flowchart showing a process flow of formula selection in a third aspect of long DRX; [Figure 17]FIG. 17 is a flowchart showing a process flow of formula selection in a first mode of short DRX; [Figure 18] FIG. 18 is a flowchart showing a process flow of formula selection in a second mode of short DRX; [Figure 19] FIG. 19 is a flowchart showing a process flow of formula selection in a third mode of short DRX; [Figure 20] FIG. 20 is a sequence diagram showing the flow of processing of SPS (Semi-Persistent Scheduling) in the second embodiment. [Figure 21] FIG. 21 is a flowchart showing the flow of a mathematical expression selection process in a first aspect of the SPS; [Figure 22] FIG. 22 is a flowchart showing the flow of a mathematical expression selection process in a first aspect of the SPS; [Figure 23] FIG. 23 is a flowchart showing the flow of a mathematical expression selection process in a second aspect of the SPS; [Figure 24] FIG. 24 is a flowchart showing the flow of a mathematical expression selection process in a second aspect of the SPS; [Figure 25] FIG. 25 is a flowchart showing the flow of a mathematical expression selection process in a third aspect of the SPS; [Figure 26] FIG. 26 is a flowchart showing the flow of a mathematical expression selection process in a third aspect of the SPS; [Figure 27] FIG. 27 is a sequence diagram showing the flow of processing a scheduling request (SR) in the second embodiment. [Figure 28] FIG. 28 is a flowchart showing the flow of a formula selection process in the first mode of SR. [Figure 29] FIG. 29 is a flowchart showing the flow of a formula selection process in the first mode of SR. [Figure 30] FIG. 30 is a flowchart showing the flow of a formula selection process in the second mode of SR. [Figure 31]FIG. 31 is a flowchart showing the flow of a formula selection process in the second mode of SR. [Figure 32] FIG. 32 is a flowchart showing the flow of a formula selection process in the third mode of SR. [Figure 33] FIG. 33 is a flowchart showing the flow of a formula selection process in the third mode of SR. [Figure 34] FIG. 34 is a sequence diagram showing the flow of processing of Type 1 of a Configured Grant (CG) in the second embodiment. [Figure 35] FIG. 35 is a flowchart showing the flow of a mathematical formula selection process in the first mode of CG type 1; [Figure 36] FIG. 36 is a flowchart showing the flow of a mathematical formula selection process in the first mode of CG type 1; [Figure 37] FIG. 37 is a flowchart showing the flow of a mathematical formula selection process in the second mode of CG type 1; [Figure 38] FIG. 38 is a flowchart showing the flow of a mathematical formula selection process in the second mode of CG type 1; [Figure 39] FIG. 39 is a flowchart showing the flow of a mathematical formula selection process in the third mode of type 1 of CG. [Figure 40] FIG. 40 is a flowchart showing the flow of a mathematical formula selection process in the third mode of CG type 1. [Figure 41] FIG. 41 is a sequence diagram showing the flow of processing of type 2 of CG in the second embodiment. [Figure 42] FIG. 42 is a flowchart showing the flow of a mathematical formula selection process in the first mode of type 2 of CG; [Figure 43] FIG. 43 is a flowchart showing the flow of a mathematical formula selection process in the first mode of CG type 2. [Figure 44] FIG. 44 is a flowchart showing the flow of a mathematical formula selection process in the second mode of CG type 2; [Figure 45]FIG. 45 is a flowchart showing the flow of a mathematical formula selection process in the second mode of CG type 2. [Figure 46] FIG. 46 is a flowchart showing the flow of a mathematical formula selection process in the third mode of CG type 2. [Figure 47] FIG. 47 is a flowchart showing the flow of the mathematical expression selection process in the third mode of type 2 of CG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In this specification and drawings, elements that can be similarly described will be designated by the same reference numerals, and redundant description may be omitted.

[0015] The embodiments described below are merely examples of configurations that can realize the present disclosure. Each of the following embodiments can be modified or changed as appropriate depending on the configuration of the device to which the present disclosure is applied and various conditions. Not all of the combinations of elements included in each of the following embodiments are necessarily essential for realizing the present disclosure, and some of the elements can be omitted as appropriate. Therefore, the scope of the present disclosure is not limited to the configurations described in each of the following embodiments. As long as there are no mutual contradictions, configurations that combine multiple configurations described in the following embodiments can also be adopted.

[0016] 1. First embodiment 1.1. Communication Systems 1, a communication system S according to the first embodiment includes one or more terminal apparatuses (Terminal Apparatus) 10, one or more base station apparatuses (Base Station Apparatus) 20, and a core network 30. The communication system S is configured in accordance with predetermined technical specifications (Technical Specifications, TS). For example, the communication system S may comply with technical specifications (e.g., 5G, 5G Advanced, 6G, etc.) defined by the Third Generation Partnership Project (3GPP).

[0017] In the communication system S, a user plane where user data is transmitted and received and a control plane where control data is transmitted and received are configured separately. That is, the communication system S supports C / U separation. The user plane is abbreviated as U-plane, and the control plane is abbreviated as C-plane.

[0018] The base station device 20 manages at least one cell. A cell constitutes the smallest unit of a communication area. For example, one cell belongs to one frequency (e.g., carrier frequency) and is composed of one component carrier. The term "cell" can refer to wireless communication resources and can also refer to a communication target of the terminal device 10. The base station device 20 wirelessly communicates with the terminal device 10 located in its own cell in the U-plane and C-plane. In other words, the base station device 20 terminates the U-plane protocol and C-plane protocol for the terminal device 10.

[0019] The base station device 20 communicates with the core network 30 in the U-plane and the C-plane. More specifically, the core network 30 includes multiple logical nodes including an Access and Mobility Management Function (AMF) and a User Plane Function (UPF). The base station device 20 connects to the AMF in the C-plane and connects to the UPF in the U-plane.

[0020] The base station device 20 may be, for example, a gNB that provides a U-plane and a C-plane conforming to the 3GPP 5G NR (New Radio) specification to the terminal device 10 and connects to the 3GPP 5GC (5G Core Network). Alternatively, the base station device 20 may be a device conforming to another older or newer 3GPP specification.

[0021] The base station device 20 may be configured by a plurality of unit devices. For example, the base station device 20 may be configured by a central unit (CU), distributed units (DU), and radio units (RU).

[0022] A radio access network (RAN) is formed by interconnecting multiple base station devices 20. The radio access network formed by the base station devices 20 that are gNBs may be referred to as an NG-RAN. The base station devices 20 that are gNBs may be referred to as NG-RAN nodes.

[0023] The plurality of base station devices 20 are connected to each other via a predetermined interface (for example, an Xn interface). More specifically, for example, the plurality of base station devices 20 are connected to each other via an Xn-U interface in the U-plane, and are connected to each other via an Xn-C interface in the C-plane. Note that the plurality of base station devices 20 may also be connected to each other via other interfaces with different functions or names.

[0024] Each base station device 20 is connected to the core network 30 via a predetermined interface (for example, an NG interface). More specifically, for example, each base station device 20 is connected to the UPF of the core network 30 via an NG-U interface in the U-plane, and is connected to the AMF of the core network 30 via an NG-C interface in the C-plane. Note that each base station device 20 may also be connected to the core network 30 via another interface with a different function or name.

[0025] As described above, the terminal device 10 is a device that performs wireless communication with the base station device 20, and may be, for example, user equipment (UE) that operates in accordance with the 3GPP 5G NR specification. The terminal device 10 may also be a device that complies with other older or newer 3GPP specifications.

[0026] The terminal device 10 may be, for example, a mobile phone terminal such as a smartphone, a tablet terminal, a laptop PC, a communication module, a communication card, or an IoT device such as a surveillance camera or a robot. The terminal device 10 may be a vehicle (e.g., a car, a train, etc.) or a device provided therein. The terminal device 10 may be a transport vehicle other than a vehicle (e.g., a ship, an airplane, etc.) or a device provided therein. The terminal device 10 may be a sensor or a device provided therein. Note that the terminal device 10 may be called by other names such as a terminal, a mobile station, a mobile terminal, a mobile device, a mobile unit, a subscriber station, a subscriber terminal, a subscriber device, a subscriber unit, a wireless station, a wireless terminal, a wireless device, a wireless unit, a remote station, a remote terminal, a remote device, or a remote unit. The terminal device 10 may be a device adapted to one or more of enhanced Mobile Broadband (eMBB), Ultra-Reliable and Low Latency Communications (URLLC), and massive Machine Type Communications (mMTC).

[0027] The radio protocol architecture between the terminal device 10 and the base station device 20 will be described with reference to Fig. 2. The radio protocol architecture between the terminal device 10 and the base station device 20 and between the terminal device 10 and the core network 30 will be described with reference to Fig. 3.

[0028] 2, the U-plane protocol stack includes, from the bottom up, a physical (PHY) layer, a media access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, and a service data adaptation protocol (SDAP) layer. Each of the above layers is terminated at the base station device 20 on the network side.

[0029] As shown in Fig. 3, the C-plane protocol stack includes, from the bottom up, a physical (PHY) layer, a media access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a non-access stratum (NAS). Each of the above layers except the non-access stratum is terminated at the base station device 20 on the network side. The non-access stratum is terminated at the AMF of the core network 30 on the network side.

[0030] 4, the terminal device 10 has, as hardware elements, a processor 101, a memory 102, an input / output interface 103, a wireless interface 104, and an antenna 105. The above elements provided in the terminal device 10 are connected to each other by an internal bus. Note that the terminal device 10 may have hardware elements other than the elements shown in FIG. 4.

[0031] The processor 101 is a computing element that realizes various functions of the terminal device 10. The processor 101 may be a SoC (System-on-a-Chip) that includes elements such as a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), and a memory controller.

[0032] The memory 102 is composed of at least one storage medium such as a RAM (Random Access Memory) or an eMMC (embedded Multi Media Card). The memory 102 is an element that temporarily or permanently stores programs and data used to execute various processes in the terminal device 10. The programs include one or more instructions for operating the terminal device 10. The processor 101 implements the functions of the terminal device 10 by loading and executing the programs stored in the memory 102 into the memory 102 and / or a system memory (not shown).

[0033] The input / output interface 103 is an interface that receives operations on the terminal device 10 and supplies them to the processor 101, and also presents various information to the user, and is, for example, a touch panel.

[0034] The wireless interface 104 is a circuit that executes various signal processing to realize wireless communication, and includes a baseband processor and an RF circuit. The wireless interface 104 transmits and receives wireless signals to and from the base station device 20 via an antenna 105.

[0035] 5, the terminal device 10 has, as functional blocks, a control unit 110 and a communication unit 120. The communication unit 120 has at least one transmission unit 121 and at least one reception unit 122.

[0036] The control unit 110 may include at least one processor 101 and at least one memory 102. In other words, the control unit 110 may be realized by the processor 101 and the memory 102. The control unit 110 executes various control processes in the terminal device 10. For example, the control unit 110 controls wireless communication with the base station device 20 via the communication unit 120.

[0037] The communication unit 120 includes the radio interface 104 and the antenna 105. In other words, the communication unit 120 is realized by the radio interface 104 and the antenna 105. The communication unit 120 wirelessly communicates with the base station device 20 by transmitting and receiving radio signals to and from the base station device 20. The communication unit 120 may include a plurality of radio interfaces 104 and a plurality of antennas 105.

[0038] The control unit 110 operates to execute various processes of the terminal device 10 of this embodiment.

[0039] 6, base station device 20 has, as hardware elements, a processor 201, a memory 202, a network interface 203, a wireless interface 204, and an antenna 205. The above elements provided in base station device 20 are connected to each other by an internal bus. Note that base station device 20 may have hardware elements other than the elements shown in FIG. 6.

[0040] The processor 201 is a computing element that realizes various functions of the base station device 20. The processor 201 may be a CPU, and may further include other processors such as a GPU.

[0041] The memory 202 is configured by at least one storage medium such as a ROM (Read Only Memory), a RAM, an HDD (Hard Disk Drive), or an SSD (Solid State Drive). The memory 202 is an element that temporarily or permanently stores programs and data used to execute various processes in the base station device 20. The programs include one or more instructions for operating the base station device 20. The processor 201 implements the functions of the base station device 20 by loading the programs stored in the memory 202 into the memory 202 and / or a system memory (not shown) and executing them.

[0042] The network interface 203 is an interface used to transmit and receive signals to and from other base station devices 20 and the core network 30 .

[0043] The wireless interface 204 is a circuit that performs various signal processing to realize wireless communication, and includes a baseband processor and an RF circuit. Terminal device 10 and transmits and receives radio signals.

[0044] 7, the base station device 20 has, as functional blocks, a control unit 210, a communication unit 220, and a network communication unit 230. The communication unit 220 has at least one transmission unit 221 and at least one reception unit 222.

[0045] The control unit 210 may include at least one processor 201 and at least one memory 202. In other words, the control unit 210 may be realized by the processor 201 and the memory 202. The control unit 210 executes various control processes in the base station device 20. For example, the control unit 210 controls wireless communication with the terminal device 10 via the communication unit 220. Furthermore, for example, the control unit 210 controls communication with other nodes (e.g., other base station devices 20, nodes of the core network 30) via the network communication unit 230.

[0046] The communication unit 220 includes a wireless interface 204 and an antenna 205. In other words, the communication unit 220 is realized by the wireless interface 204 and the antenna 205. The communication unit 220 wirelessly communicates with the terminal device 10 by transmitting and receiving wireless signals to and from the terminal device 10. The communication unit 220 may include a plurality of wireless interfaces 204 and a plurality of antennas 205.

[0047] The network communication unit 230 includes the network interface 203. In other words, the network communication unit 230 is realized by the network interface 203. The network interface 203 transmits and receives signals to and from the network (and, by extension, the other nodes described above).

[0048] The control unit 210 operates to execute various processes in the base station device 20 of this embodiment.

[0049] 1.2. Radio Resources The terminal device 10 and the base station device 20 communicate wirelessly with each other using radio resources in the frequency domain and the time domain. The radio resources will be described below.

[0050] The transmission method for downlink communication from the base station device 20 to the terminal device 10 is, for example, Orthogonal Frequency Division Multiplexing (OFDM) using a cyclic prefix (CP), that is, CP-OFDM. The transmission method for uplink communication from the terminal device 10 to the base station device 20 is, for example, the above-mentioned CP-OFDM or DFTS-OFDM in which CP-OFDM is applied after Transform Precoding that performs Discrete Fourier Transform (DFT) spreading.

[0051] A cyclic prefix is ​​a redundant signal that functions as a guard interval to prevent inter-symbol interference and inter-carrier interference, and is inserted at the beginning of an OFDM symbol. There are two types of cyclic prefixes: a normal cyclic prefix and an extended cyclic prefix.

[0052] As radio resources in the frequency domain of OFDM, multiple subcarriers that are orthogonal to each other are used. The multiple subcarriers are arranged in the frequency domain at a predetermined subcarrier spacing (sub-carrier spacing, SCS) Δf. Multiple subcarrier spacings Δf can be applied in a communication system S. The subcarrier spacing Δf is expressed by, for example, the following equation: Δf=2 μ 15[kHz]

[0053] Here, μ is an integer equal to or greater than 0 and can take on at least one of the following values: 0, 1, 2, 3, 4, 5, or 6. Therefore, the subcarrier spacing Δf [kHz] can take on at least one of the following values: 15, 30, 60, 120, 240, 480, or 960. Note that μ may also take on a value of 7 or greater.

[0054] In the time domain of OFDM, a layered radio frame structure is used as shown in Figure 8. One radio frame includes 10 subframes. Subframes are assigned subframe numbers that count up by one from 0 to 9. One radio frame is divided into two half frames. r The time length of a radio frame is 10 ms, the time length of a half frame is 5 ms, and the time length of a subframe is 1 ms. These time lengths do not depend on the subcarrier spacing Δf.

[0055] One subframe includes one or more slots (slot(s)). The number Ns of slots included in one subframe depends on the value of μ mentioned above, and further on the subcarrier spacing Δf. The number Ns of slots is expressed by, for example, the following equation: Ns=2 μ

[0056] One slot contains multiple symbols. The number of symbols in one slot depends on the type of cyclic prefix. For example, if a normal cyclic prefix is ​​used, one slot contains 14 symbols. For example, if an extended cyclic prefix is ​​used, one slot contains 12 symbols.

[0057] As described above, the number of slots and the number of symbols included in each of a radio frame, half frame, and subframe, each of which has a fixed time length, are variable. Therefore, the time length of a slot and the time length of a symbol are also variable.

[0058] A resource element (RE) is a radio resource unit in the time-frequency domain consisting of one subcarrier and one symbol, and a resource block (RB) is a radio resource unit in the time-frequency domain consisting of 12 subcarriers and multiple symbols.

[0059] Each radio frame is assigned a system frame number (SFN), which counts up by one from 0 to 1023. SFN "0" corresponds to the initial SFN value, and SFN "1023" corresponds to the maximum SFN value. Therefore, SFN0 is assigned to the radio frame following a radio frame assigned SFN 1023. Since the time length of a radio frame is 10 ms, the time length of one cycle of the system frame number is 10240 ms (= 10.24 seconds).

[0060] Furthermore, a hyper-system frame number (H-SFN) may be used. The hyper-system frame number is a number that counts up by one from 0 to 1023 for each cycle of the system frame number. Since the time length of one cycle of the system frame number is 10.24 seconds, the time length of one cycle of the hyper-system frame number is 10485.76 seconds (= approximately 2.91 hours). In other words, the hyper-system frame number may be incremented by one when the system frame number wraps around.

[0061] Here, the base station device 20 may transmit system information including information indicating H-SFN to the terminal device 10. For example, the base station device 20 may transmit system information block 1 (SIB1) including information indicating H-SFN to the terminal device 10. Here, system information block 1 is also referred to as system information block type 1. Furthermore, the base station device 20 may transmit information indicating that extended DRX (eDRX) is permitted in the cell (serving cell) to the terminal device 10. For example, the base station device 20 may indicate that extended DRX (operation in extended DRX) is permitted in the cell by transmitting information indicating that extended DRX is permitted in the cell (i.e., by the information being present in the field). Furthermore, the base station device 20 may indicate that extended DRX (operation in extended DRX) is not permitted in the cell by not transmitting information indicating that extended DRX is permitted in the cell (i.e., by the information not being present in the field). For example, the base station device 20 may transmit system information (e.g., SIB1) including information indicating that extended DRX is permitted in the cell to the terminal device 10. That is, the base station device 20 may transmit system information (e.g., SIB1) including information indicating H-SFN and / or information indicating that extended DRX is permitted in the cell to the terminal device 10.

[0062] The terminal device 10 may identify the H-SFN based on information indicating the H-SFN. Furthermore, the terminal device 10 may determine whether to use the H-SFN based on the information indicating the H-SFN. Furthermore, the terminal device 10 may determine whether to use the H-SFN based on information indicating that enhanced DRX is permitted in the cell. That is, the terminal device 10 may determine whether to use the H-SFN based on information indicating the H-SFN and / or information indicating that enhanced DRX is permitted in the cell. Furthermore, the terminal device 10 may determine whether to perform enhanced DRX based on information indicating that enhanced DRX is permitted in the cell. In this embodiment, DRX may include enhanced DRX. That is, DRX in this embodiment may be replaced with enhanced DRX.

[0063] Here, the base station device 20 may configure one or more serving cells for the terminal device 10. The serving cell may correspond to a component carrier in the downlink and / or a component carrier in the uplink. A technology in which one or more serving cells are configured and the base station device 20 and the terminal device 10 perform wireless communication may also be referred to as carrier aggregation.

[0064] Furthermore, the base station device 20 may configure one or more bandwidth parts (Bandwidth Parts, BWPs) for the terminal device 10 with respect to each of one or more serving cells. For example, a downlink bandwidth part (DL-BWP) may be configured in the downlink of one serving cell. Furthermore, an uplink bandwidth part (UL-BWP) may be configured in the uplink of one serving cell. Here, the DL-BWP may include an initial DL-BWP and / or a dedicated DL-BWP. Furthermore, the UL-BWP may include an initial UL-BWP and / or a dedicated UL-BWP. Hereinafter, BWP may include a DL-BWP and / or a UL-BWP.

[0065] 1.3. Channel and Control Information The terminal device 10 and the base station device 20 transmit and receive user data and control information to and from each other. The transmission and reception of control information in the downlink and uplink will be exemplified below.

[0066] The terminal device 10 and the base station device 20 transmit and receive user data and control information using a plurality of hierarchical channels. Physical channels are channels used for physical communication between the terminal device 10 and the base station device 20. Examples of physical channels include a Physical Downlink Control Channel (PDCCH), a Physical Broadcast Channel (PBCH), and a Physical Uplink Control Channel (PUCCH).

[0067] A transport channel is a channel located above a physical channel and is mapped to a physical channel in the PHY layer. Multiple transport channels may be mapped to one physical channel. Examples of transport channels include a Downlink Shared Channel (DL-SCH) and an Uplink Shared Channel (UL-SCH). For example, data in the downlink may also be referred to as DL-SCH data. Also, for example, data in the uplink may also be referred to as UL-SCH data. Here, DL-SCH data includes downlink user data. Also, UL-SCH data includes uplink user data.

[0068] A logical channel is a channel located above a transport channel and is mapped to a transport channel in the MAC layer. Multiple logical channels may be mapped to one transport channel, and one logical channel may be mapped to multiple transport channels. Logical channels are classified according to the characteristics of the information they transmit. Examples of logical channels include a Broadcast Control Channel (BCCH), a Common Control Channel (CCCH), and a Dedicated Control Channel (DCCH).

[0069] The base station device 20 uses a PDCCH, which is a physical channel, to transmit downlink control information (DCI) to the terminal device 10. The DCI includes information regarding downlink and uplink resource allocation for the terminal device 10 and other control information for the terminal device 10. The DCI is mapped to the PDCCH and corresponds to Layer 1 signaling.

[0070] Here, one or more formats may be defined for transmission of DCI in the PDCCH. A format defined for transmission of DCI in the PDCCH may be referred to as a DCI format. For example, the DCI format may include a DCI format used for scheduling a Physical Downlink Shared Channel (PDSCH) (e.g., a format referred to as DCI format 1_0, DCI format 1_1, and / or DCI format 1_2). Furthermore, for example, the DCI format may include a DCI format used for scheduling a Physical Uplink Shared Channel (PUSCH) (e.g., a format referred to as DCI format 0_0, DCI format 0_1, and / or DCI format 0_2). Furthermore, the DCI format may include a DCI format not used for scheduling a PDSCH and / or a PUSCH. A DCI format used for scheduling a PDSCH and / or a PUSCH may be referred to as a scheduling DCI format. A DCI format that is not used for scheduling a PDSCH and / or a PUSCH may be referred to as a non-scheduling DCI format. In this embodiment, for ease of explanation, a "DCI format" may be simply referred to as a "PDCCH." Furthermore, a "DCI generated according to a DCI format" may be simply referred to as a "DCI format."

[0071] For example, the base station device 20 may configure frequency domain resources and / or time domain resources that the terminal device 10 monitors (i.e., monitors) a PDCCH candidate set. For example, the frequency domain resources that the terminal device 10 monitors the PDCCH candidate set may be referred to as a control resource set (CORESET). Furthermore, the time domain resources that the terminal device 10 monitors the PDCCH candidate set may be referred to as a search space set (SSS). The terminal device 10 may monitor the PDCCH candidate set in one or more CORESETs in the DL-BWP of a serving cell in which PDCCH monitoring is configured, according to the corresponding search space set. Here, monitoring may imply attempting to decode each of the PDCCH candidates according to the monitored DCI format. The above configuration may be referred to as blind decoding.

[0072] Here, a CRC (Cyclic Redundancy Check) scrambled with an RNTI (Radio Network Temporary Identifier) ​​may be added to DCI (or a DCI format) transmitted on the PDCCH. The CRC may also be referred to as a CRC parity bit. Multiple types of RNTIs are defined. For example, the base station device 20 may set each RNTI by transmitting an RRC message including at least one of information indicating a C-RNTI (Cell-RNTI), information indicating a MCS-C-RNTI (Modulation and Coding Scheme Cell-RNTI), and information indicating a CS-RNTI (Configured Scheduling-RNTI). In other words, a CRC scrambled with at least one of a C-RNTI, an MCS-C-RNTI, and a CS-RNTI may be added to DCI (or a DCI format) transmitted on the PDCCH.

[0073] That is, the terminal device 10 may monitor (and / or receive) the PDCCH and detect (and / or receive) the DCI format. Here, as will be described later, the terminal device 10 may perform the monitoring (and / or reception) of the PDCCH during an active time in the DRX operation.

[0074] The terminal device 10 transmits uplink control information (UCI) to the base station device 20 using a PUCCH, which is a physical channel. The UCI includes control information such as a scheduling request (SR), an Ack / Nack of a hybrid automatic repeat reQuest (HARQ), and channel state information (CSI). The UCI is mapped to the PUCCH or PUSCH and corresponds to layer 1 signaling.

[0075] The base station device 20 transmits a control element (CE) of the MAC layer to the terminal device 10 using DL-SCH, which is a transport channel. The downlink MAC CE includes control information such as a DRX (described later) command. The downlink MAC CE is mapped to a PDSCH via DL-SCH and corresponds to Layer 2 signaling.

[0076] The terminal device 10 transmits a control element (CE) of the MAC layer to the base station device 20 using the UL-SCH, which is a transport channel. The uplink MAC CE includes control information such as a buffer status report (BSR). The uplink MAC CE is mapped to a PUSCH via the UL-SCH and corresponds to Layer 2 signaling.

[0077] The base station device 20 transmits (or broadcasts) system information (SI) to the terminal device 10 using the BCCH, which is a logical channel. The SI includes minimum system information (MSI) and other system information (OSI). The MSI includes a master information block (MIB) and system information block 1 (SIB1). The SIB1 may be referred to as remaining minimum system information (RMSI). The OSI includes system information blocks (SIB2 onward) other than SIB1. Of the BCCH, the MIB is mapped to the PBCH via the BCH (Broadcast CHannel), and the SIB is mapped to the PDSCH via the DL-SCH.

[0078] The base station device 20 transmits control information in the RRC layer to the terminal device 10 using a signaling radio bearer (SRB) established between the terminal device 10 and the base station device 20 in the RRC layer. Hereinafter, a message exchanged between the base station device 20 and the terminal device 10 in the RRC layer may be referred to as an RRC message. There are multiple types of SRBs (for example, SRB0, SRB1, SRB2, SRB3, and SRB4). The SRBs are used for transmitting and receiving NAS messages including control information in the NAS layer as well as RRC messages. A CCCH or a DCCH is used to transmit an RRC message from the base station device 20 to the terminal device 10. The CCCH and DCCH are each mapped to a PDSCH via a DL-SCH. The RRC message corresponds to Layer 3 signaling.

[0079] As an example of a downlink RRC message, an RRC reconfiguration message will be described. The RRC reconfiguration message is an RRC message transmitted from the base station device 20 to the terminal device 10 using SRB1 or SRB3. A DCCH is used to transmit the RRC reconfiguration message. The RRC reconfiguration message is used to perform reconfiguration or modification of the connection between the base station device 20 and the terminal device 10.

[0080] The terminal device 10 uses the above-mentioned SRB to transmit an RRC message to the base station device 20. A CCCH or a DCCH is used to transmit the RRC message from the terminal device 10 to the base station device 20. The CCCH and DCCH are each mapped to a PUSCH via a UL-SCH. The RRC message corresponds to Layer 3 signaling.

[0081] As an example of an uplink RRC message, a user equipment capability information (UECapabilityInformation) message will be described. The user equipment capability information message is an RRC message transmitted from the terminal device 10 to the base station device 20 using SRB1. A DCCH is used to transmit the user equipment capability information message. The user equipment capability information message is used to notify the base station device 20 of information related to the radio access capability of the terminal device 10.

[0082] As an example of an uplink RRC message, a user equipment assistance information (UE Assistance Information) message will be described. The user equipment assistance information message is an RRC message transmitted from the terminal device 10 to the base station device 20 using SRB1 or SRB3. DCCH is used to transmit the user equipment assistance information message. The user equipment assistance information message is used to notify the base station device 20 of various information related to the terminal device 10 (UE assistance information).

[0083] 1.4. Radio Resource Control (RRC) States As shown in FIG. 9, the terminal device 10 is in one of three radio resource control (RRC) states: RRC connected (RRC_CONNECTED), RRC inactive (RRC_INACTIVE), and RRC idle (RRC_IDLE).

[0084] The RRC connected (RRC_CONNECTED) state is a state in which a connection (RRC context) between the terminal device 10 and the base station device 20 is established, and the terminal device 10 transmits and receives radio signals to and from the base station device 20. In the RRC inactive (RRC_INACTIVE) state, the connection (RRC context) between the terminal device 10 and the base station device 20 is maintained, but the terminal device 10 does not transmit or receive radio signals to and from the base station device 20. In the RRC idle (RRC_IDLE) state, the connection (RRC context) between the terminal device 10 and the base station device 20 is released.

[0085] The power consumption of the terminal device 10 increases in the order of the RRC idle (RRC_IDLE) state, the RRC inactive (RRC_INACTIVE) state, and the RRC connected (RRC_CONNECTED) state.

[0086] Scheduling 1.5.1. Downlink Scheduling As described above, the base station device 20 transmits DCI to the terminal device 10 using the PDCCH. The DCI includes information regarding resource allocation of the PDSCH. The terminal device 10 receives a signal from the base station device 20 using the configured resources of the PDSCH. In this way, the base station device 20 can dynamically perform downlink scheduling using the DCI.

[0087] Unlike the dynamic scheduling described above, SPS (Semi-Persistent Scheduling) is a scheduling method for semi-persistently allocating radio resources. The base station device 20 transmits an RRC message including SPS parameters to the terminal device 10. The SPS parameters are included in an SPS-Config IE, which is an example of an RRC information element (IE). The SPS-Config IE includes a parameter "periodicity" related to the periodicity of transmission using the PDSCH (i.e., the periodicity of downlink resource allocation configured for SPS). The parameter "periodicity" is set in units of milliseconds. Alternatively, the parameter "periodicity" may be set in units of frames per second (FPS).

[0088] The base station device 20 transmits DCI scrambled with a Configured Scheduling Radio Network Temporary Identifier (CS-RNTI) to the terminal device 10. The CS-RNTI is used to activate periodic transmission using the PDSCH. After transmitting the DCI, the base station device 20 transmits a signal using the PDSCH at a set period.

[0089] 1.5.2. Uplink Scheduling (1) Scheduling Request (SR) The SR is used by the terminal device 10 to request radio resource allocation for PUSCH from the base station device 20. The SR may also be used to request UL-SCH resources for initial transmission. The base station device 20 allocates PUCCH resources for transmitting the SR to the terminal device 10. The base station device 20 transmits an RRC message including SR parameters to the terminal device 10. The SR parameters are included in a SchedulingRequestResourceConfig IE, which is an example of an RRC information element (IE). The SchedulingRequestResourceConfig includes a parameter periodicityAndOffset related to the SR transmission periodicity (SRperiodicity) and offset (SRoffset). Note that the parameter SRperiodicity is set in units of the number of slots or the number of symbols. Alternatively, the parameter SRperiodicity may be set in units of FPS.

[0090] The terminal device 10 transmits UCI including an SR to the base station device 20 using the configured PUCCH resource. The terminal device 10 may transmit UCI on demand. The terminal device 10 may transmit UCI at a configured period. For example, the terminal device 10 may transmit an SR set to "0" (negative SR) and / or an SR set to "1" (positive SR).

[0091] (2) Configured Grant (CG) CG is a scheduling method for allocating radio resources without the procedure of transmitting an SR. CG includes two types: Type 1 and Type 2. The base station device 20 transmits an RRC message including CG parameters to the terminal device 10. The CG parameters are included in a ConfiguredGrantConfig IE, which is an example of an RRC information element (IE). The ConfiguredGrantConfig IE includes a parameter periodicity related to the periodicity of transmission using the PUSCH. Note that the parameter periodicity is set in units of the number of slots or the number of symbols. Alternatively, the parameter periodicity may be set in units of FPS. In Type 1, the terminal device 10 starts transmitting a signal at a set periodicity without being triggered by DCI. On the other hand, in Type 2, the terminal device 10 starts transmitting using the PUSCH at a set periodicity in response to activation by DCI scrambled with CS-RNTI.

[0092] 1.6. Discontinuous Reception (DRX) Discontinuous Reception (DRX) is used as a technique for reducing power consumption of the terminal device 10. DRX can be applied to the terminal device 10 in an RRC idle state and an RRC connected state. DRX in the RRC connected state is called CDRX (Connected mode Discontinuous Reception).

[0093] As schematically shown in FIG. 10 , when DRX is configured (or set), the terminal device 10 does not need to continuously monitor the PDCCH, but monitors the PDCCH only during a predetermined on-duration. That is, the on-duration may be a period during which the terminal device 10 waits to receive one or more PDCCHs (i.e., PDCCH(s)). For example, after waking up, the terminal device 10 may wait to receive one or more PDCCHs during the on-duration. Furthermore, if the terminal device 10 successfully decodes the PDCCH, the terminal device 10 may continue monitoring the PDCCH and start an inactivity timer. Here, the repetition of the on-duration (for example, periodic repetition) may be set using a predetermined cycle (DRX cycle).

[0094] In DRX in the RRC idle state, the terminal device 10, for example, intermittently monitors the PDCCH to receive a paging message that calls the terminal device 10. In CDRX, the terminal device 10, for example, intermittently monitors the PDCCH to receive resource allocation information (i.e., a DCI format used for scheduling the PDSCH and / or PUSCH). In DRX, a configuration can also be adopted in which short DRX with a shorter cycle is first performed, and then long DRX with a longer cycle is performed.

[0095] Some or all of the DRX parameters used to configure DRX in the terminal device 10 may be transmitted from the base station device 20 to the terminal device 10 using an RRC message. That is, the base station device 20 may transmit an RRC message including some or all of the DRX parameters to the terminal device 10. Here, some or all of the DRX parameters may be set for a cell group including one or more serving cells. That is, the base station device 20 may set a cell group including one or more serving cells, and set some or all of the DRX parameters for the set cell group. For example, the base station device 20 may transmit an RRC message including information for setting a cell group to the terminal device 10. Here, the cell group may be a cell group for setting MAC parameters. Furthermore, the cell group may be referred to as a master cell group and / or a secondary cell group. Furthermore, the cell group may be referred to as a DRX group.

[0096] The terminal device 10 receives an RRC message including some or all of the DRX parameters, and controls the DRX operation based on some or all of the DRX parameters. That is, the terminal device 10 can control the DRX operation for each cell group based on some or all of the DRX parameters. In particular, a DRX-Config IE, which is an example of an RRC information element (IE), may include some or all of the DRX parameters, and an RRCReconfiguration, which is an RRC message including the DRX-Config IE, may be transmitted from the base station device 20 to the terminal device 10. Some or all of the DRX parameters may be included in another IE.

[0097] Here, some of the DRX parameters may be set commonly to the cell groups, that is, some of the DRX parameters may be set as parameters common to one or more cell groups, rather than being set for each cell group.

[0098] The following are examples of DRX parameters used to configure (or set) DRX in the terminal device 10. Note that the DRX parameters may be referred to as a set of DRX parameters or information related to DRX. The DRX settings set (in other words, specified, determined, or identified) by the DRX parameters may be referred to as a DRX setting. For example, the first DRX setting may include at least one of an on-duration, an inactivity timer, and / or a cycle (in other words, a DRX cycle).

[0099] An on-duration timer (drx-onDurationTimer) indicating the length of the on-duration of the terminal device 10. This DRX parameter is used to set the value of the on-duration. For example, the drx-onDurationTimer may be used to set the duration at the start of a DRX cycle.

[0100] - An inactivity timer (drx-InactivityTimer) indicating the period during which the terminal device 10 maintains the ON state after receiving the PDCCH (i.e., the period until it turns OFF). This DRX parameter may correspond to the value of the timer (inactivity timer). For example, the drx-InactivityTimer may be used to set the period after receiving a PDCCH (i.e., a PDCCH occasion) indicating a new DL transmission and / or UL transmission.

[0101] - Cycle of on-period in short DRX (eg, short cycle) (drx-ShortCycle) This DRX parameter may correspond to the cycle in short DRX (DRX cycle).

[0102] A short cycle timer (drx-ShortCycleTimer) indicating the duration of short DRX. For example, a period according to the short DRX cycle may be set in the terminal device 10 using the drx-ShortCycleTimer.

[0103] - A start offset (drx-LongCycleStartOffset) indicating the cycle of the on-duration in long DRX (e.g., long cycle) and / or the start position of DRX (e.g., subframe and / or slot). This DRX parameter may correspond to the cycle in long DRX (DRX cycle). For example, the start position of the long DRX cycle and / or the short DRX cycle may be set using drx-LongCycleStartOffset.

[0104] A slot offset (drx-SlotOffset) indicating the delay before the on-duration starts. For example, the drx-SlotOffset may be used to set the delay before the on-duration timer (drx-onDurationTimer) starts.

[0105] In this embodiment, "the on-duration is started" includes starting the drx-onDurationTimer. The above-mentioned active time may include the time during which the drx-onDurationTimer or the drx-InactivityTimer is running. Specifically, the active time for a serving cell in a certain cell group may include the time during which the drx-onDurationTimer or the drx-InactivityTimer set for the certain cell group is running.

[0106] In normal DRX (including CDRX), the time arrangement of the on-periods is specified by the system frame number (SFN) and subframe number. As mentioned above, one cycle of the system frame number is 10240 ms (= 10.24 seconds). When one cycle ends, the SFN returns to 0.

[0107] To introduce a longer time range into DRX, extended DRX (eDRX) can be applied. In eDRX, the time arrangement of the on-period is specified using the above-mentioned hyper system frame number in addition to the system frame number (SFN) and subframe number. As mentioned above, one cycle of the hyper system frame number is 10485.76 seconds (= approximately 2.91 hours), so a longer time range can be used in eDRX.

[0108] 1.7. Extended Reality (XR) This section explains the characteristics of traffic generated in XR. In XR, multiple types of data (video data, audio data, user data, control data, etc.) are transmitted and received in parallel. The multiple data streams corresponding to the above data each have different traffic characteristics and quality of service (QoS) requirements.

[0109] The timing of sending and receiving the above data may experience time shifts, which can be expressed as jitter, variability, or fluctuation, due to factors such as video and audio encoding and network delays.

[0110] Video data is sent and received based on a frame rate expressed in frames per second (FPS). For example, one frame of data is sent and received every 16.67 ms at 60 FPS, and every 8.33 ms at 120 FPS.

[0111] 1.8. Controlling the start timing (start position) of the on-period in DRX Configuration Overview The following equation A1 may be used to determine the start of the on-duration in long DRX: The on-duration in long DRX starts at the SFN and subframe number that satisfy equation A1.

number

[0112] It is assumed that the terminal device 10 starts an on-duration in long DRX using Equation A1. For example, the parameters of Equation A1 have the following values. drx-LongCycle = 50ms drx-StartOffset = 0

[0113] As described above, the time length of one SFN cycle is 10240 ms. If the time length of one SFN cycle is not an integer multiple of the time length of the long DRX cycle, a situation like that shown in FIG. 11 occurs. For example, signals 901 and 902 arrive at the terminal device 10 from the base station device 20 at a time interval of 50 ms. Here, when the SFN is updated from 1023 to 0, Equation A1 holds. Therefore, the terminal device 10 starts the on-period of long DRX from subframe number 0 of SFN0. This operation makes the time interval of the on-period shorter than 50 ms. Because the time length of the long DRX cycle is not maintained constant, a mismatch occurs between the timing at which signal 902 arrives and the on-period. This may result in a delay. Furthermore, to resolve the mismatch, the base station device 20 may reset DRX parameters. This increases signaling between the base station device 20 and the terminal device 10.

[0114] Furthermore, the following equation B1 may be used to determine the start of the on-period in short DRX: According to equation B1, the situation shown in FIG. 11 may also occur in short DRX.

number

[0115] Furthermore, the above-mentioned problem may also occur in XR implementation. The arrival interval of video data in XR implementation is, for example, 16.67 ms. In this case, the time length of the set DRX cycle may not be an integer multiple of the time length of one SFN cycle. Therefore, as in the above, when the SFN is updated from 1023 to 0, a mismatch occurs between the timing at which the signal from the base station device 20 arrives and the ON period.

[0116] Furthermore, in order to accommodate the above-mentioned intervals between arrivals of video data, a non-integer value may be introduced into the time length of the long DRX cycle in the future. In this case, a mismatch may occur between the timing at which a signal arrives from the base station device 20 and the on-period when the SFN is updated from 1023 to 0. In this specification, the expression "the time length is a non-integer value" means that the reference unit of the time length is not an integer. In the following embodiments, it is assumed that the reference unit of the time length is milliseconds.

[0117] Next, the operations of the terminal device 10 and base station device 20 according to this embodiment will be described. As shown in Fig. 12, the control unit 210 of the base station device 20 transmits an RRC message to the terminal device 10 via the communication unit 220 (S1001). The RRC message is an RRC reconfiguration message including a DRX-config IE. The control unit 110 of the terminal device 10 starts a DRX cycle based on the reception of parameters included in the DRX-config IE (S1002).

[0118] In this embodiment, a correction value may be applied to SFN in equations A1 and B1 for determining the on-period in DRX. The control unit 110 starts a DRX cycle using the equations including the correction value for SFN.

[0119] The above formula includes an addition operation of the SFN and the correction value. Furthermore, the correction value is a value that does not become zero even when the SFN is updated from 1023 to 0. With this configuration, the value of the addition operation does not become zero when the SFN is updated from 1023 to 0. This keeps the time length of the DRX cycle constant.

[0120] The correction value may be a value that increases as the number of times the SFN is updated from 1023 to 0 increases. For example, the correction value may be a value calculated using a first value corresponding to the number of times the SFN is updated from 1023 to 0 and a second value for offsetting the SFN. For example, the correction value may be the product of the first value and the second value. With this configuration, the SFN in the above formula is appropriately offset according to the number of times the SFN is updated from 1023 to 0. This maintains a constant time length for the DRX cycle. The formulas applied to long DRX and short DRX will be described in more detail below.

[0121] 1.8.2. Long DRX (1) First aspect The control unit 110 starts the on-period in long DRX using the following formula A2. "sfnOffset_1 × n" corresponds to the correction value. n is a value that increases by 1 each time SFN becomes 0, and corresponds to the first value. sfnOffset_1 is a value for offsetting SFN, and corresponds to the second value.

number

[0122] The control unit 110 determines whether or not Equation A2 is satisfied. The control unit 110 starts the on-duration in long DRX at the timing when Equation A2 is satisfied. Specifically, the control unit 110 starts the on-duration timer (drx-onDurationTimer) at a timing delayed by the value indicated by drx-SlotOffset from the SFN and subframe number that satisfy Equation A2. That is, the control unit 110 starts the on-duration at a timing delayed by the value indicated by drx-SlotOffset from the SFN and subframe number that satisfy Equation A2.

[0123] The above configuration provides the following advantages: For example, the parameters of formula A2 have the following values. drx-LongCycle = 50ms drx-StartOffset = 0 sfnOffset_1 = 4

[0124] As shown in FIG. 13, signals 1101 and 1102 arrive at the terminal device 10 from the base station device 20 at a time interval (cycle) of 50 ms. Equation A2 is established when the SFN is 1 and the subframe number is 0. At this timing, the control unit 110 starts an on-period in long DRX. This maintains the interval (cycle) of the on-period at 50 ms. Therefore, the timing at which the signal 1102 arrives after the SFN is updated to 0 coincides with the timing of the on-period. The terminal device 10 can receive the signal 1102.

[0125] The above configuration can reduce the possibility of a mismatch occurring between the timing at which a signal arrives from the base station device 20 and the on-period, thereby preventing the occurrence of the above-mentioned delay and an increase in signaling due to the resetting of DRX parameters.

[0126] The base station device 20 transmits offset information related to sfnOffset_1 to the terminal device 10. The offset information related to sfnOffset_1 is referred to as "first offset information." The base station device 20 may transmit an RRC message including the first offset information to the terminal device 10. The first offset information may be set as a new element of the DRX-config IE. That is, the base station device 20 may transmit an RRC message including the first offset information for a certain cell group to the terminal device 10. That is, the first offset information may be set for each of one or more cell groups (cell groups for which DRX parameters are set). The first offset information may be set in an IE other than the DRX-config IE. For example, the base station device 20 may transmit an RRC message including the first offset information for a serving cell belonging to a certain cell group to the terminal device 10. That is, the first offset information may be set for each of one or more serving cells (each serving cell belonging to a cell group for which DRX parameters are set). The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the first offset information to the terminal device 10. The base station device 20 may transmit DCI including the first offset information to the terminal device 10.

[0127] That is, the terminal device 10 may determine the active time for a serving cell belonging to a certain cell group based on sfnOffset_1 set for the certain cell group. That is, the terminal device 10 may start an on-period for a certain cell group based on sfnOffset_1 for the certain cell group, and may regard the time during which the on-period is operating as the active time for the serving cell belonging to the certain cell group. The terminal device 10 monitors the PDCCH during the active time. Furthermore, the terminal device 10 may determine the active time for a serving cell belonging to a certain cell group (a cell group for which DRX parameters are set) based on sfnOffset_1 set for the serving cell. That is, the terminal device 10 may start an on-period for the certain cell group based on sfnOffset_1 for the certain saving cell, and may regard the time during which the on-period is operating as the active time for the serving cell belonging to the certain cell group. The terminal device 10 monitors the PDCCH during the active time. In this embodiment, the operations performed by the terminal device 10 to determine the active time and / or the operations performed to monitor the PDCCH during the active time are also referred to as operations in DRX.

[0128] -Variation 1 The terminal device 10 may be configured to switch the formula. As shown in FIG. 14 , the control unit 110 of the terminal device 10 determines whether or not the first offset information has been received from the base station device 20 (S1201). If the first offset information has been received (Yes in S1201), the control unit 110 selects Formula A2 (S1202). The control unit 110 starts a long DRX cycle using Formula A2 (S1204). On the other hand, if the first offset information has not been received (No in S1201), the control unit 110 selects Formula A1 (S1203). The control unit 110 starts a long DRX cycle using Formula A1 (S1204). For example, the terminal device 10 may select Formula A1 and / or Formula A2 based on reception of information used to select Formula A1 and / or Formula A2, and perform an operation in DRX. For example, the base station device 20 may transmit an RRC message including information used to select Mathematical Formula A1 and / or Mathematical Formula A2 to the terminal device 10. For example, the base station device 20 may set information used to select Mathematical Formula A1 and / or Mathematical Formula A2 for a certain cell group, and the terminal device 10 may select Mathematical Formula A1 and / or Mathematical Formula A2 based on the information used to select Mathematical Formula A1 and / or Mathematical Formula A2 in serving belonging to the certain cell group, and perform an operation in DRX using the selected formula.

[0129] According to the above configuration, the terminal device 10 can select an appropriate mathematical formula in accordance with information from the base station device 20.

[0130] -Variation 2 The base station device 20 may use formulas A1 and A2 to identify the long DRX cycle in the terminal device 10. In this case, the base station device 20 may select formulas as follows. When the control unit 210 of the base station device 20 transmits first offset information to the terminal device 10, it selects formula A2. On the other hand, when the control unit 210 does not transmit first offset information to the terminal device 10, it selects formula A1.

[0131] (2) Second aspect The control unit 110 starts the on-period in long DRX using the following formula A3. SFN_offset_1 is the remainder when the time length of one SFN cycle is divided by the time length of the long DRX cycle. SFN_offset_1 is a value used to correct the start position of the on-period in long DRX in milliseconds from the point when SFN is updated to 0.

number

[0132] Note that formula A3 can also be transformed into formula A3-2 below. "SFN + SFN_offset_1 / 10×n" corresponds to the above addition operation. In this way, formula A3 can also be transformed into a formula in a format that offsets SFN.

number

[0133] The control unit 110 calculates SFN_offset_1 using drx-LongCycle, which is a DRX parameter. With this configuration, the base station device 20 does not need to newly notify the terminal device 10 of SFN_offset_1 in addition to the DRX parameter. This makes it possible to reduce signaling between the base station device 20 and the terminal device 10.

[0134] -Variation 1 The base station device 20 may transmit, to the terminal device 10, indication information (hereinafter also referred to as first indication information, which may be information used to select Mathematical Formula A3) indicating the use of Mathematical Formula A3. For example, the base station device 20 may transmit, to the terminal device 10, an RRC message including the first indication information. The first indication information may be set as a new element of a DRX-config IE. That is, the base station device 20 may transmit, to the terminal device 10, an RRC message including the first indication information for a certain cell group. That is, the first indication information may be set for each of one or more cell groups (cell groups for which DRX parameters are set). Furthermore, the first indication information may be set in an IE other than the DRX-config IE. For example, the base station device 20 may transmit, to the terminal device 10, an RRC message including the first indication information for a serving cell belonging to a certain cell group. That is, the first indication information may be set for each of one or more serving cells (each serving cell belonging to a cell group for which DRX parameters are set). The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the first instruction information to the terminal device 10. The base station device 20 may transmit DCI including the first instruction information to the terminal device 10.

[0135] -Variation 2 The terminal device 10 may be configured to switch between mathematical formulas. As shown in FIG. 15, the control unit 110 of the terminal device 10 determines whether the following condition H1 is met (S1301). That is, the control unit 110 may determine whether the following condition H1 is met. Hereinafter, in this embodiment, "a condition is met" may mean that the condition is met. Also, in this embodiment, "a condition is not met" may mean that the condition is not met. That is, in this embodiment, "whether a condition is met" may mean that the condition is met. Condition H1 corresponds to a use condition for determining whether to use mathematical formula A3. Condition H1 is one or a combination of two or more selected from the following conditions h11 to h13. h11: The terminal device 10 has received, from the base station device 20, setting information for the long DRX cycle in which the time length of one SFN cycle is not an integral multiple of the time length of the long DRX cycle. h12: The terminal device 10 receives, from the base station device 20, setting information for the long DRX cycle, which is a time length with a non-integer value. h13: The terminal device 10 receives the first instruction information from the base station device 20.

[0136] It should be noted that throughout this specification, when a condition to be determined is a combination of two or more conditions, these two or more conditions may be combined using logical sum (OR) and / or logical product (AND), and conditions may be selected from all combinations obtained by combining such logical operations.

[0137] If condition H1 is met (Yes in S1301), control unit 110 selects formula A3 (S1302). Control unit 110 starts a long DRX cycle using formula A3 (S1304). On the other hand, if condition H1 is not met (No in S1301), control unit 110 selects formula A1 (S1303). Control unit 110 starts a long DRX cycle using formula A1 (S1304).

[0138] -Variation 3 The base station device 20 may use formulas A1 and A3 to identify the long DRX cycle in the terminal device 10. In this case, the base station device 20 may select the formulas as follows. The control unit 210 of the base station device 20 determines whether the following condition H2 is met. Condition H2 corresponds to a use condition for determining whether to use formula A3. Condition H2 is one or a combination of two or more selected from the following conditions h21 to h23. h21: The base station device 20 transmits the first instruction information to the terminal device 10. h22: The base station device 20 transmits to the terminal device 10 setting information for the long DRX cycle, in which the time length of one SFN cycle is not an integral multiple of the time length of the long DRX cycle. h23: The base station device 20 transmits to the terminal device 10 setting information for the long DRX cycle, which is a time length with a non-integer value.

[0139] If condition H2 is met, control unit 210 selects formula A3, and if condition H2 is not met, control unit 210 selects formula A1.

[0140] (3) Third aspect Furthermore, H-SFN may be used for DRX operation. That is, the terminal device 10 may apply H-SFN for DRX operation. When H-SFN is used (applied), the control unit 110 starts an on-period in long DRX using the following formula A4. "SFN + H-SFN × 1024" corresponds to the above addition operation. The 1024 in "H-SFN × 1024" corresponds to the number of SFNs included in one cycle of H-SFN.

number

[0141] According to the above configuration, even when H-SFN is used, the interval (cycle) of the long DRX on period is maintained constant. Even when SFN is updated from 1023 to 0, the long DRX cycle is maintained constant without change.

[0142] -Variation 1 The base station device 20 may transmit, to the terminal device 10, instruction information indicating the use of Mathematical Formula A4 (hereinafter also referred to as second instruction information, which may be information used to apply H-SFN to DRX operations or information used to select Mathematical Formula A4). For example, the base station device 20 may transmit, to the terminal device 10, an RRC message including the second instruction information. The second instruction information may be set as a new element of a DRX-config IE. That is, the base station device 20 may transmit, to the terminal device 10, an RRC message including the second instruction information for a certain cell group. That is, the second instruction information may be set for each of one or more cell groups (cell groups for which DRX parameters are set). Furthermore, the second instruction information may be set in an IE other than the DRX-config IE. For example, the base station device 20 may transmit, to the terminal device 10, an RRC message including the second instruction information for a serving cell belonging to a certain cell group. That is, the second instruction information may be configured for each of one or more serving cells (each of the serving cells belonging to the cell group for which the DRX parameters are configured). The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the second instruction information to the terminal device 10. The base station device 20 may transmit DCI including the second instruction information to the terminal device 10.

[0143] As described above, the base station device 20 may transmit, to the terminal device 10, system information (e.g., SIB1) including information indicating H-SFN and / or information indicating that enhanced DRX is permitted in the cell. That is, the terminal device 10 may apply H-SFN to the DRX operation (may determine whether to apply H-SFN to the DRX operation) based on the information indicating H-SFN, the information indicating that enhanced DRX is permitted in the cell, and / or the second instruction information. That is, the terminal device 10 may use Equation A4 for the DRX operation (may determine whether to use Equation A4 for the DRX operation) based on the information indicating H-SFN, the information indicating that enhanced DRX is permitted in the cell, and / or the second instruction information. For example, the terminal device 10 may apply H-SFN to the DRX operation when all of the information indicating H-SFN, the information indicating that enhanced DRX is permitted in the cell, and the second instruction information are configured. Furthermore, when at least one of the information indicating H-SFN, the information indicating that enhanced DRX is permitted in the cell, and the second instruction information is not set, the terminal device 10 may not apply H-SFN to the operation in DRX. For example, when the terminal device 10 does not apply H-SFN to the operation in DRX, the terminal device 10 may perform the operation in DRX based on Equation A1.

[0144] Also, as described above, the terminal device 10 may transition to any one of the RRC connected, RRC inactive, and RRC idle states as the RRC state. That is, the terminal device 10 in the RRC connected state may apply H-SFN to the operation in DRX. That is, information indicating H-SFN and / or information indicating that enhanced DRX is permitted in the cell may be configured for the terminal device 10 in the RRC connected state, the RRC inactive state, and / or the RRC idle state. For example, the terminal device 10 in the RRC connected state may acquire information indicating H-SFN and / or information indicating that enhanced DRX is permitted in the cell (i.e., SIB1 including information indicating H-SFN and / or information indicating that enhanced DRX is permitted in the cell) based on the second instruction information (reception of the second instruction information), and apply H-SFN to the operation in DRX.

[0145] -Variation 2 The terminal device 10 may be configured to switch between mathematical formulas. As shown in Fig. 16, the control unit 110 of the terminal device 10 determines whether the following condition H3 is met (S1401). The condition H3 corresponds to a use condition for determining whether to use mathematical formula A4. The condition H3 is one or a combination of two or more selected from the following conditions h31 to h34. For example, the condition H3 may be a combination of h31 and h34. h31: The terminal device 10 receives from the base station device 20 setting information for the long DRX cycle, in which the time length of one SFN cycle is not an integral multiple of the time length of the long DRX cycle. h32: The terminal device 10 receives, from the base station device 20, setting information for the long DRX cycle, which is a time length with a non-integer value. h33: The terminal device 10 receives the second instruction information from the base station device 20. h34: The terminal device 10 receives information related to H-SFN from the base station device 20. The information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (for example, SIB1).

[0146] If condition H3 is met (Yes in S1401), the control unit 110 selects formula A4 (S1402). The control unit 110 starts a long DRX cycle using formula A4 (S1404). On the other hand, if condition H3 is not met (No in S1401), the control unit 110 selects formula A1 (S1403). The control unit 110 starts a long DRX cycle using formula A1 (S1404).

[0147] According to the above configuration, the terminal device 10 can select an appropriate formula in accordance with the time length of the long DRX cycle and / or information from the base station device 20.

[0148] -Variation 3 The base station device 20 may use formulas A1 and A4 to identify the long DRX cycle in the terminal device 10. In this case, the base station device 20 may select the formula as follows. The control unit 210 of the base station device 20 determines whether the following condition H4 is met. Condition H4 corresponds to a use condition for determining whether to use formula A4. Condition H4 is one or a combination of two or more selected from the following conditions h41 to h44. For example, condition H4 may be a combination of h41 and h44. h41: The base station device 20 transmits the second instruction information to the terminal device 10. h42: The base station device 20 transmits to the terminal device 10 setting information for the long DRX cycle, in which the time length of one SFN cycle is not an integral multiple of the time length of the long DRX cycle. h43: The base station device 20 transmits to the terminal device 10 setting information for the long DRX cycle, which is a time length with a non-integer value. h44: The base station device 20 transmits information related to H-SFN to the terminal device 10. The information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (for example, SIB1).

[0149] If condition H4 is met, control unit 210 selects formula A4, and if condition H4 is not met, control unit 210 selects formula A1.

[0150] Short DRX (1) First aspect The control unit 110 starts the on period in short DRX using the following formula (B2).

number

[0151] According to the above configuration, in short DRX, even when the SFN is updated from 1023 to 0, the interval between the on-periods is maintained constant. Therefore, it is possible to reduce the possibility of a mismatch occurring between the timing at which a signal from the base station device 20 arrives and the on-period. This makes it possible to prevent the occurrence of the above-mentioned delay and an increase in signaling due to the resetting of DRX parameters.

[0152] The base station device 20 transmits offset information related to sfnOffset_2 to the terminal device 10. The offset information related to sfnOffset_2 is referred to as "second offset information." The base station device 20 may transmit an RRC message including the second offset information to the terminal device 10. The second offset information may be set as a new element of the DRX-config IE. That is, the base station device 20 may transmit an RRC message including the second offset information for a certain cell group to the terminal device 10. That is, the second offset information may be set for each of one or more cell groups (cell groups for which DRX parameters are set). The second offset information may be set in an IE other than the DRX-config IE. For example, the base station device 20 may transmit an RRC message including the second offset information for a serving cell belonging to a certain cell group to the terminal device 10. That is, the second offset information may be set for each of one or more serving cells (each serving cell belonging to a cell group for which DRX parameters are set). The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the second offset information to the terminal device 10. The base station device 20 may transmit DCI including the second offset information to the terminal device 10. sfnOffset_2 in Equation B2 may use the same value as sfnOffset_1 in Equation A2. That is, when the base station device 20 transmits first offset information related to sfnOffset_1 to the terminal device 10, it does not need to transmit second offset information related to sfnOffset_2 to the terminal device 10.

[0153] That is, the terminal device 10 may determine the active time for a serving cell belonging to a certain cell group based on sfnOffset_2 set for the certain cell group. That is, the terminal device 10 may start an on-period for the certain cell group based on sfnOffset_2 for the certain cell group, and may regard the time during which the on-period is operating as the active time for the serving cell belonging to the certain cell group. The terminal device 10 monitors the PDCCH during the active time. Furthermore, the terminal device 10 may determine the active time for a serving cell belonging to a certain cell group (a cell group for which DRX parameters are set) based on sfnOffset_2 set for the serving cell. That is, the terminal device 10 may start an on-period for the certain cell group based on sfnOffset_2 for the certain saving cell, and may regard the time during which the on-period is operating as the active time for the serving cell belonging to the certain cell group. The terminal device 10 monitors the PDCCH during the active time.

[0154] -Variation 1 The terminal device 10 may be configured to switch the formula. As shown in FIG. 17 , the control unit 110 of the terminal device 10 determines whether or not the second offset information has been received from the base station device 20 (S1501). If the second offset information has been received (Yes in S1501), the control unit 110 selects Formula B2 (S1502). The control unit 110 starts a short DRX cycle using Formula B2 (S1504). On the other hand, if the second offset information has not been received (No in S1501), the control unit 110 selects Formula B1 (S1503). The control unit 110 starts a short DRX cycle using Formula B1 (S1504). For example, the terminal device 10 may select Formula B1 and / or Formula B2 based on the reception of information used to select Formula B1 and / or Formula B2, and perform an operation in DRX. For example, the base station device 20 may transmit an RRC message including information used to select Mathematical Formula B1 and / or Mathematical Formula B2 to the terminal device 10. For example, the base station device 20 may set information used to select Mathematical Formula B1 and / or Mathematical Formula B2 for a certain cell group, and the terminal device 10 may select Mathematical Formula B1 and / or Mathematical Formula B2 based on the information used to select Mathematical Formula B1 and / or Mathematical Formula B2 in serving belonging to the certain cell group, and perform an operation in DRX using the selected formula.

[0155] According to the above configuration, the terminal device 10 can select an appropriate mathematical formula in accordance with information from the base station device 20.

[0156] -Variation 2 The base station device 20 may use formulas B1 and B2 to identify the cycle of short DRX in the terminal device 10. In this case, the base station device 20 may select formulas as follows. When the control unit 210 of the base station device 20 transmits the second offset information to the terminal device 10, it selects formula B2. When the control unit 210 does not transmit the second offset information to the terminal device 10, it selects formula B1.

[0157] (2) Second aspect The control unit 110 starts the on-period in short DRX using the following formula B3. SFN_offset_2 is the remainder when the time length of one SFN cycle is divided by the time length of the short DRX cycle. SFN_offset_2 is a value used to correct the start position of the on-period in short DRX in milliseconds from the point when SFN is updated to 0.

number

[0158] Note that formula B3 can also be transformed into formula B3-2 below. "SFN + SFN_offset_2 / 10×n" corresponds to the above addition operation. In this way, formula B3 can also be transformed into a formula in a format that offsets SFN.

number

[0159] The control unit 110 calculates SFN_offset_2 using drx-shortCycle, which is a DRX parameter. With this configuration, the base station device 20 does not need to newly notify the terminal device 10 of SFN_offset_2 in addition to the DRX parameter. This makes it possible to reduce signaling between the base station device 20 and the terminal device 10.

[0160] -Variation 1 The base station device 20 may transmit, to the terminal device 10, instruction information indicating the use of Mathematical Formula B3 (hereinafter also referred to as third instruction information, which may be information used to select Mathematical Formula B3). For example, the base station device 20 may transmit, to the terminal device 10, an RRC message including the third instruction information. The third instruction information may be set as a new element of a DRX-config IE. That is, the base station device 20 may transmit, to the terminal device 10, an RRC message including the third instruction information for a certain cell group. That is, the third instruction information may be set for each of one or more cell groups (cell groups for which DRX parameters are set). Furthermore, the third instruction information may be set in an IE other than the DRX-config IE. For example, the base station device 20 may transmit, to the terminal device 10, an RRC message including the third instruction information for a serving cell belonging to a certain cell group. That is, the third instruction information may be set for each of one or more serving cells (each serving cell belonging to a cell group for which DRX parameters are set). The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the third instruction information to the terminal device 10. The base station device 20 may transmit DCI including the third instruction information to the terminal device 10.

[0161] -Variation 2 The terminal device 10 may be configured to switch between mathematical formulas. As shown in Fig. 18, the control unit 110 of the terminal device 10 determines whether the following condition H5 is met (S1601). Condition H5 corresponds to a use condition for determining whether to use mathematical formula B3. Condition H5 is one or a combination of two or more selected from the following conditions h51 to h53. h51: The terminal device 10 receives, from the base station device 20, setting information for the short DRX cycle in which the time length of one SFN cycle is not an integral multiple of the time length of the short DRX cycle. h52: The terminal device 10 receives from the base station device 20 setting information for the short DRX cycle, which is a time length with a non-integer value. h53: The terminal device 10 receives the third instruction information from the base station device 20.

[0162] If condition H5 is met (Yes in S1601), the control unit 110 selects formula B3 (S1602). The control unit 110 starts a short DRX cycle using formula B3 (S1604). On the other hand, if condition H5 is not met (No in S1601), the control unit 110 selects formula B1 (S1603). The control unit 110 starts a short DRX cycle using formula B1 (S1604).

[0163] -Variation 3 The base station device 20 may use formulas B1 and B3 to identify the cycle of short DRX in the terminal device 10. In this case, the base station device 20 may select the formula as follows. The control unit 210 of the base station device 20 determines whether the following condition H6 is met. Condition H6 corresponds to a use condition for determining whether to use formula B3. Condition H6 is one or a combination of two or more selected from the following conditions h61 to h63. h61: The base station device 20 transmits the third instruction information to the terminal device 10. h62: The base station device 20 transmits to the terminal device 10 setting information for the short DRX cycle, in which the time length of one SFN cycle is not an integral multiple of the time length of the short DRX cycle. h63: The base station device 20 transmits, to the terminal device 10, setting information for the short DRX cycle, which is a time length with a non-integer value.

[0164] If condition H6 is met, control unit 210 selects formula B3, and if condition H6 is not met, control unit 210 selects formula B1.

[0165] (3) Third aspect Furthermore, H-SFN may be used for operation in short DRX. That is, the terminal device 10 may apply H-SFN for operation in short DRX. When H-SFN is used (applied), the control unit 110 starts an on-period in short DRX using the following formula B4.

number

[0166] According to the above configuration, the short DRX cycle is maintained constant even when H-SFN is used. Even when SFN is updated from 1023 to 0, the long DRX cycle is maintained constant without change.

[0167] -Variation 1 The base station device 20 may transmit, to the terminal device 10, instruction information indicating the use of Mathematical Formula B4 (hereinafter also referred to as fourth instruction information, which may be information used to apply H-SFN to DRX operations or information used to select Mathematical Formula B4). For example, the base station device 20 may transmit, to the terminal device 10, an RRC message including the fourth instruction information. The fourth instruction information may be set as a new element of a DRX-config IE. That is, the base station device 20 may transmit, to the terminal device 10, an RRC message including the fourth instruction information for a certain cell group. That is, the fourth instruction information may be set for each of one or more cell groups (cell groups for which DRX parameters are set). Furthermore, the fourth instruction information may be set in an IE other than the DRX-config IE. For example, the base station device 20 may transmit, to the terminal device 10, an RRC message including the fourth instruction information for a serving cell belonging to a certain cell group. That is, the fourth instruction information may be set for each of one or more serving cells (each of the serving cells belonging to the cell group for which the DRX parameters are set). The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the fourth instruction information to the terminal device 10. The base station device 20 may transmit DCI including the fourth instruction information to the terminal device 10.

[0168] As described above, the base station device 20 may transmit, to the terminal device 10, system information (for example, SIB1) including information indicating H-SFN and / or information indicating that enhanced DRX is permitted in the cell. That is, the terminal device 10 may apply H-SFN to the DRX operation (may determine whether to apply H-SFN to the DRX operation) based on the information indicating H-SFN, the information indicating that enhanced DRX is permitted in the cell, and / or the fourth instruction information. That is, the terminal device 10 may use Equation B4 for the DRX operation (may determine whether to use Equation B4 for the DRX operation) based on the information indicating H-SFN, the information indicating that enhanced DRX is permitted in the cell, and / or the fourth instruction information. For example, the terminal device 10 may apply H-SFN to the DRX operation when all of the information indicating H-SFN, the information indicating that enhanced DRX is permitted in the cell, and the fourth instruction information are configured. Furthermore, when at least one of the information indicating H-SFN, the information indicating that enhanced DRX is permitted in the cell, and the fourth instruction information is not set, the terminal device 10 may not apply H-SFN to the operation in DRX. For example, when not applying H-SFN to the operation in DRX, the terminal device 10 may perform the operation in DRX based on Equation B1.

[0169] Furthermore, as described above, the terminal device 10 in the RRC connected state may apply H-SFN to the operation in DRX. That is, information indicating H-SFN and / or information indicating that enhanced DRX is permitted in the cell may be configured for the terminal device 10 in the RRC connected state, the RRC inactive state, and / or the RRC idle state. For example, the terminal device 10 in the RRC connected state may acquire information indicating H-SFN and / or information indicating that enhanced DRX is permitted in the cell (that is, SIB1 including information indicating H-SFN and / or information indicating that enhanced DRX is permitted in the cell) based on the fourth instruction information (reception of the fourth instruction information), and apply H-SFN to the operation in DRX.

[0170] -Variation 2 The terminal device 10 may be configured to switch between mathematical formulas. As shown in Fig. 19, the control unit 110 of the terminal device 10 determines whether the following condition H7 is met (S1701). Condition H7 corresponds to a use condition for determining whether to use mathematical formula B4. Condition H7 is one or a combination of two or more selected from the following conditions h71 to h74. For example, condition H7 may be a combination of h71 and h74. h71: The terminal device 10 receives, from the base station device 20, setting information for the short DRX cycle, in which the time length of one SFN cycle is not an integral multiple of the time length of the short DRX cycle. h72: The terminal device 10 receives from the base station device 20 setting information for the short DRX cycle, which is a time length with a non-integer value. h73: The terminal device 10 receives the fourth instruction information from the base station device 20. h74: The terminal device 10 receives information related to H-SFN from the base station device 20. The information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (for example, SIB1).

[0171] If condition H7 is met (Yes in S1701), the control unit 110 selects formula B4 (S1702). The control unit 110 starts a short DRX cycle using formula B4 (S1704). On the other hand, if condition H7 is not met (No in S1701), the control unit 110 selects formula B1 (S1703). The control unit 110 starts a short DRX cycle using formula B1 (S1704).

[0172] According to the above configuration, the terminal device 10 can select an appropriate formula according to the time length of the short DRX cycle and / or information from the base station device 20.

[0173] -Variation 3 The base station device 20 may use formulas B1 and B4 to identify the long DRX cycle in the terminal device 10. In this case, the base station device 20 may select the formula as follows. The control unit 210 of the base station device 20 determines whether the following condition H8 is met. Condition H8 corresponds to a use condition for determining whether to use formula B4. Condition H8 is one or a combination of two or more selected from the following conditions h81 to h84. For example, condition H8 may be a combination of h81 and h84. h81: The base station device 20 transmits the fourth instruction information to the terminal device 10. h82: The base station device 20 transmits to the terminal device 10 setting information for the short DRX cycle, in which the time length of one SFN cycle is not an integral multiple of the time length of the short DRX cycle. h83: The base station device 20 transmits, to the terminal device 10, setting information for the short DRX cycle, which is a time length with a non-integer value. h84: The base station device 20 transmits information related to H-SFN to the terminal device 10. The information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (for example, SIB1).

[0174] If condition H8 is met, control unit 210 selects formula B4. If condition H8 is not met, control unit 210 selects formula B1.

[0175] 2. Second embodiment 2.1. Configuration Overview Other periodic operations using SFN may also encounter problems with maintaining a consistent periodicity. Examples of such operations include: -SPS base station equipment 20 Periodic transmission by -Terminal device 10 Periodic transmission of SR by -CG terminal device 10 Periodic transmission by

[0176] In the above operation, a mathematical formula is used to determine the timing of the periodic operation. The SFN is used in the mathematical formula. As already described in the first embodiment, when such a mathematical formula is used, a problem occurs in that the periodicity of the operation is not maintained constant when the SFN is updated from 1023 to 0 due to the set periodicity value.

[0177] In this embodiment, a correction value may be applied to the SFN in the formulas used in SPS, SR, and CG.

[0178] The control unit 110 of the terminal device 10 performs periodic transmission or reception operations using a mathematical formula including a correction value for the SFN. Furthermore, the control unit 210 of the base station device 20 performs periodic transmission or reception operations using a mathematical formula including a correction value for the SFN.

[0179] The above formula includes an addition operation of the SFN and the correction value. The correction value is a value that does not become zero even when the SFN is updated from 1023 to 0. With this configuration, the value of the addition operation does not become zero when the SFN is updated from 1023 to 0. This maintains a constant operation cycle.

[0180] The correction value may be a value that increases as the number of times the SFN is updated from 1023 to 0 increases. For example, the correction value may be a value calculated using a first value corresponding to the number of times the SFN is updated from 1023 to 0 and a second value for offsetting the SFN. For example, the correction value may be the product of the first value and the second value. With this configuration, the SFN in the above formula is appropriately offset according to the number of times the SFN is updated from 1023 to 0. This maintains a constant operation cycle. This reduces the possibility of delays. Furthermore, it also reduces the possibility of increased signaling due to parameter resetting. The formulas applied to SPS, SR, and CG will be described in more detail below.

[0181] 2.2. SPS (Semi-Persistent Scheduling) To allocate downlink resources in SPS, the following formula C1 may be used:

number

[0182] The parameters in formula C1 are as follows: - numberOfSlotsPerFrame: The number of slots contained in one radio frame. -SFN start time : SFN of the first PDSCH transmission opportunity when downlink allocation is initialized or reinitialized. -Slot start time: The slot number of the first PDSCH transmission opportunity when the downlink allocation is initialized or reinitialized. -periodicity: Downlink allocation periodicity configured for PDSCH. Note that the parameter periodicity in the SPS corresponds to the transmission period of the base station device 20, and is included in the SPS-Config IE as described above. The unit of the parameter periodicity is milliseconds. For example, the base station device 20 may transmit to the terminal device 10 an RRC message including parameters related to the SPS for a certain serving cell (i.e., the SPS-Config IE). That is, the parameters related to the SPS (i.e., the SPS-Config IE) may be set for each of one or more serving cells. The base station device 20 may also transmit to the terminal device 10 an RRC message including parameters related to the SPS for a certain DL-BWP (i.e., the SPS-Config IE). That is, the parameters related to the SPS (i.e., the SPS-Config IE) may be set for each of one or more DL-BWPs. The terminal device 10 may identify parameters related to the SPS for each of one or more DL-BWPs (i.e., the SPS-Config IE).

[0183] The base station device 20 allocates an N-th downlink resource at an SFN and slot number that satisfy Equation C1. The base station device 20 performs a transmission operation using the allocated resource. For example, when DCI to which a CRC scrambled by CS-RNTI is added (i.e., DCI used for scheduling the PDSCH) indicates SPS activation (i.e., when the PDCCH indicates SPS activation), the terminal device 10 may store the DCI as a configured downlink assignment. Here, the DCI (DCI format) used for scheduling the PDSCH is also referred to as a downlink assignment. Furthermore, after a downlink assignment is configured for an SPS, the terminal device 10 may consider that an N-th downlink assignment occurs sequentially at an SFN and slot number that satisfy Equation C1. That is, the terminal device 10 may perform PDSCH reception by considering that the stored downlink assignment occurs sequentially at an SFN and slot number that satisfy Equation C1. Similarly, the base station device 20 may transmit a PDSCH by assuming that the downlink assignments stored in the terminal device 10 are generated sequentially for an SFN and slot number that satisfy the mathematical formula C1. Hereinafter, the terminal device 10 receiving a PDSCH by assuming that the stored downlink assignments are generated sequentially based on a certain mathematical formula will also be referred to as a PDSCH receiving operation using the mathematical formula (simply, a receiving operation). Here, the PDSCH receiving operation using the mathematical formula also includes simply the terminal device 10 receiving the PDSCH. Furthermore, the base station device 20 transmitting a PDSCH by assuming that the stored downlink assignments are generated sequentially based on a certain mathematical formula will also be referred to as a PDSCH transmitting operation using the mathematical formula (simply, a transmitting operation). Here, the PDSCH transmitting operation using the mathematical formula also includes simply the base station device 20 transmitting the PDSCH.

[0184] If the time length of one cycle of the SFN is not an integral multiple of the time length of the transmission period (i.e., periodicity) of the base station device 20, the time length of the transmission period will change when the SFN is updated from 1023 to 0. This creates a problem in that a constant transmission period cannot be maintained. Below, we will explain how to solve this problem.

[0185] (1) First aspect 20, the control unit 210 of the base station device 20 transmits an RRC message including SPS parameters to the terminal device 10 via the communication unit 220 (S1801). The control unit 210 transmits DCI scrambled with the CS-RNTI to the terminal device 10 via the communication unit 220 (S1802). This activates periodic transmission operations using the PDSCH.

[0186] The control unit 210 performs a transmission operation using the following formula C2 (S1803). The control unit 110 of the terminal device 100 performs a reception operation using the following formula C2 (S1804). "sfnOffset_3 × n" corresponds to the above correction value. n is a value that increases by 1 each time SFN becomes 0, and corresponds to the above first value. sfnOffset_3 is a value for offsetting SFN, and corresponds to the above second value.

number

[0187] According to the above configuration, the base station device 20 can perform a transmission operation at a regular interval even when the SFN is updated from 1023 to 0. Furthermore, the terminal device 10 can perform a reception operation at a regular interval in accordance with the transmission operation of the base station device 20.

[0188] The base station device 20 transmits offset information related to sfnOffset_3 to the terminal device 10. The offset information related to sfnOffset_3 is referred to as "third offset information." The base station device 20 may transmit an RRC message including the third offset information to the terminal device 10. For example, the base station device 20 may set the third offset information for a serving cell and / or a DL-BWP for which an SPS parameter is set. That is, the third offset information may be set for each of one or more serving cells. Also, the third offset information may be set for each of one or more DL-BWPs. The third offset information may be set as a new element of an SPS-config IE. That is, the base station device 20 may transmit an RRC message including the third offset information for a certain serving cell and / or a certain DL-BWP to the terminal device 10. That is, the third offset information may be configured for each of one or more serving cells and / or each of one or more DL-BWPs (each of the serving cells and / or DL-BWPs for which SPS parameters are configured). The third offset information may be configured in an IE other than the SPS-config IE. The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the third offset information to the terminal device 10. The base station device 20 may transmit DCI including the third offset information to the terminal device 10. That is, the base station device 20 may transmit the third offset information for a certain serving cell and / or a certain DL-BWP, and perform a transmission operation of a PDSCH in the certain serving cell and / or the certain DL-BWP based on the third offset information. In addition, the terminal device 10 may receive the above-mentioned third offset information for a certain serving cell and / or a certain DL-BWP, and perform a receiving operation of the PDSCH in the certain serving cell and / or the certain DL-BWP based on the third offset information.

[0189] -Variation 1 Base station device 20 may be configured to switch between formulas. Control unit 210 of base station device 20 may select a formula in accordance with the transmission of the third offset information. As shown in FIG. 21 , when the third offset information has been transmitted (Yes in S1901), control unit 210 selects formula C2 (S1902). Control unit 210 performs a periodic transmission operation using formula C2 (S1904). On the other hand, when the third offset information has not been transmitted (No in S1901), control unit 210 selects formula C1 (S1903). Control unit 210 performs a periodic transmission operation using formula C1 (S1904).

[0190] -Variation 2 The terminal device 10 may be configured to switch between formulas. As shown in Fig. 22, the control unit 110 of the terminal device 10 determines whether or not the third offset information has been received from the base station device 20 (S2001). If the third offset information has been received (Yes in S2001), the control unit 110 selects formula C2 (S2002). The control unit 110 performs a periodic reception operation using formula C2 (S2004). On the other hand, if the third offset information has not been received (No in S2001), the control unit 110 selects formula C1 (S2003). The control unit 110 performs a periodic reception operation using formula C1 (S2004).

[0191] According to the above configuration, the terminal device 10 can select an appropriate mathematical formula in accordance with information from the base station device 20.

[0192] (2) Second aspect The control unit 210 of the base station device 20 performs a transmission operation using the following formula C3. The control unit 110 of the terminal device 10 performs a reception operation using the following formula C3. SFN_offset_3 corresponds to the second value described above. SFN_offset_3 is the remainder when the time length of one SFN cycle is divided by the time length of the transmission period of the base station device 20.

number

[0193] According to the above configuration, the control unit 210 of the base station device 20 calculates SFN_offset_3 based on periodicity, which is an SPS parameter. The control unit 110 of the terminal device 10 calculates SFN_offset_3 based on periodicity included in the SPS-config IE of the RRC message. According to this configuration, the base station device 20 does not need to newly notify the terminal device 10 of SFN_offset_3 in addition to the SPS parameter. This makes it possible to reduce signaling between the base station device 20 and the terminal device 10.

[0194] -Variation 1 The base station device 20 may transmit, to the terminal device 10, instruction information indicating the use of Mathematical Formula C3 (hereinafter also referred to as fifth instruction information, which may be information used to select Mathematical Formula C3). The base station device 20 may transmit, to the terminal device 10, an RRC message including the fifth instruction information. For example, the base station device 20 may configure the fifth instruction information for a serving cell and / or a DL-BWP for which SPS parameters are configured. That is, the fifth instruction information may be configured for each of one or more cell groups. Furthermore, the fifth instruction information may be configured for each of one or more DL-BWPs. The fifth instruction information may be configured as a new element of an SPS-config IE. That is, the base station device 20 may transmit, to the terminal device 10, an RRC message including the fifth instruction information for a certain serving cell and / or a certain DL-BWP. That is, the fifth instruction information may be configured for each of one or more serving cells and / or each of one or more DL-BWPs (each of the serving cells and / or DL-BWPs for which SPS parameters are configured). The fifth instruction information may be configured in an IE other than the SPS-config IE. The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the fifth instruction information to the terminal device 10. The base station device 20 may transmit DCI including the fifth instruction information to the terminal device 10. That is, the base station device 20 may transmit the fifth instruction information for a certain serving cell and / or a certain DL-BWP, and perform a PDSCH transmission operation in the certain serving cell and / or the certain DL-BWP based on the fifth instruction information. In addition, the terminal device 10 may receive the above-mentioned fifth instruction information for a certain serving cell and / or a certain DL-BWP, and perform a receiving operation of the PDSCH in the certain serving cell and / or the certain DL-BWP based on the fifth instruction information.

[0195] -Variation 2 The base station device 20 may be configured to switch between formulas. As shown in FIG. 23, when the fifth instruction information is transmitted (Yes in S2101), the control unit 210 selects formula C3 (S2102). The control unit 210 executes a periodic transmission operation using formula C3 (S2104). On the other hand, when the fifth instruction information is not transmitted (No in S2101), the control unit 210 selects formula C1 (S2103). The control unit 210 executes a periodic transmission operation using formula C1 (S2104).

[0196] Note that the control unit 210 of the base station device 20 may select one of the formulas C1 and C3 based on the value of periodicity, which is an SPS parameter. That is, the control unit 210 may select one of the formulas C1 and C3 based on the following condition I0. The condition I0 is one selected from the following conditions i01 to i02, or a combination of these two. i01: The base station device 20 transmits to the terminal device 10 setting information for the transmission period, in which the time length of one SFN cycle is not an integral multiple of the time length of the base station device 20's transmission period. i02: The base station device 20 transmits to the terminal device 10 setting information for the transmission cycle of the base station device 20, which is a time length with a non-integer value.

[0197] For example, if the condition I0 is met, the control unit 210 may select the formula C3. For example, if the condition I0 is not met, the control unit 210 may select the formula C1.

[0198] -Variation 3 The terminal device 10 may be configured to switch between mathematical formulas. As shown in Fig. 24, the control unit 110 of the terminal device 10 determines whether the following condition I1 is met (S2201). Condition I1 corresponds to a use condition for determining whether to use mathematical formula C3. Condition I1 is one or a combination of two or more selected from the following conditions i11 to i13. i11: The terminal device 10 receives, from the base station device 20, setting information for the transmission period of the base station device 20, in which the time length of one cycle of the SFN is not an integral multiple of the time length of the transmission period of the base station device 20. i12: The terminal device 10 receives, from the base station device 20, setting information of the transmission cycle of the base station device 20, in which the time length is a non-integer value. i13: The terminal device 10 receives the fifth instruction information from the base station device 20.

[0199] If condition I1 is met (Yes in S2201), control unit 110 selects formula C3 (S2202). Control unit 110 executes a periodic reception operation using formula C3 (S2204). On the other hand, if condition I1 is not met (No in S2201), control unit 110 selects formula C1 (S2203). Control unit 110 executes a periodic reception operation using formula C1 (S2204).

[0200] According to the above configuration, the terminal device 10 can select an appropriate formula in accordance with the time length of the transmission cycle of the base station device 20 and / or information from the base station device 20.

[0201] (3) Third aspect A case where H-SFN is used (applied) will be described. The control unit 210 of the base station device 20 performs a transmission operation using the following formula C4. The control unit 110 of the terminal device 10 performs a reception operation using the following formula C4. "SFN + H-SFN × 1024" corresponds to the above addition operation. The 1024 in "H-SFN × 1024" corresponds to the number of SFNs included in one cycle of H-SFN.

number

[0202] According to the above configuration, even when H-SFN is used, the transmission cycle of the base station device 20 is maintained constant. Even when the SFN is updated from 1023 to 0, the long DRX cycle is maintained constant without change.

[0203] -Variation 1 The base station device 20 may transmit, to the terminal device 10, instruction information indicating the use of Mathematical Formula C4 (hereinafter also referred to as sixth instruction information, which may be information used to apply H-SFN in the SPS or information used to select Mathematical Formula C4). For example, the base station device 20 may transmit, to the terminal device 10, an RRC message including the sixth instruction information. For example, the base station device 20 may set the sixth instruction information for a serving cell and / or a DL-BWP for which SPS parameters are set. That is, the sixth instruction information may be set for each of one or more cell groups. Also, the sixth instruction information may be set for one or each DL-BWP. The sixth instruction information may be set as a new element of an SPS-config IE. That is, the base station device 20 may transmit, to the terminal device 10, an RRC message including the sixth instruction information for a certain serving cell and / or a certain DL-BWP. That is, the sixth instruction information may be configured for each of one or more serving cells and / or each of one or more DL-BWPs (each of the serving cells and / or DL-BWPs for which SPS parameters are configured). The sixth instruction information may be configured in an IE other than the SPS-config IE. The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the sixth instruction information to the terminal device 10. The base station device 20 may transmit DCI including the sixth instruction information to the terminal device 10. That is, the base station device 20 may transmit the sixth instruction information for a certain serving cell and / or a certain DL-BWP, and perform a PDSCH transmission operation in the certain serving cell and / or the certain DL-BWP based on the sixth instruction information. In addition, the terminal device 10 may receive the above-mentioned sixth instruction information for a certain serving cell and / or a certain DL-BWP, and perform a receiving operation of the PDSCH in the certain serving cell and / or the certain DL-BWP based on the sixth instruction information.

[0204] -Variation 2 The base station device 20 may be configured to switch between formulas. As shown in Fig. 25, the control unit 210 of the base station device 20 determines whether the following condition I2 is met (S2301). The condition I2 corresponds to a use condition for determining whether to use the formula C4. The condition I2 is one or a combination of two or more selected from the following conditions i21 to i24. i21: The base station device 20 transmits the sixth instruction information to the terminal device 10. i22: The base station device 20 transmits to the terminal device 10 setting information for the transmission period of the base station device 20, in which the time length of one SFN cycle is not an integral multiple of the time length of the transmission period of the base station device 20. i23: The base station device 20 transmits to the terminal device 10 setting information for the transmission cycle of the base station device 20, which is a time length with a non-integer value. i24: The base station device 20 transmits information related to H-SFN to the terminal device 10. The information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (e.g., SIB1).

[0205] If condition I2 is met (Yes in S2301), control unit 210 selects formula C4 (S2302). Control unit 210 executes a periodic transmission operation using formula C4 (S2304). On the other hand, if condition I2 is not met (No in S2301), control unit 210 selects formula C1 (S2303). Control unit 210 executes a periodic transmission operation using formula C1 (S2304).

[0206] -Variation 3 The terminal device 10 may be configured to switch between mathematical formulas. As shown in Fig. 26, the control unit 110 of the terminal device 10 determines whether the following condition I3 is met (S2401). Condition I3 corresponds to a use condition for determining whether to use mathematical formula C4. Condition I3 is one or a combination of two or more selected from the following conditions i31 to i34. For example, condition I3 may be a combination of i31 and i34. i31: The terminal device 10 receives, from the base station device 20, setting information for the transmission period of the base station device 20, in which the time length of one cycle of the SFN is not an integral multiple of the time length of the transmission period of the base station device 20. i32: The terminal device 10 has received, from the base station device 20, setting information for the transmission cycle of the base station device 20, in which the time length is a non-integer value. i33: The terminal device 10 receives the sixth instruction information from the base station device 20. i34: The terminal device 10 receives information related to H-SFN from the base station device 20. The information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (e.g., SIB1).

[0207] If condition I3 is met (Yes in S2401), control unit 110 selects formula C4 (S2402). Control unit 110 executes a periodic reception operation using formula C4 (S2404). On the other hand, if condition I3 is not met (No in S2401), control unit 110 selects formula C1 (S2403). Control unit 110 executes a periodic reception operation using formula C1 (S2404).

[0208] According to the above configuration, the terminal device 10 can select an appropriate formula in accordance with the time length of the transmission cycle of the base station device 20 and / or information from the base station device 20.

[0209] 2.3. Scheduling Request (SR) To determine the transmission opportunity of the SR, the following formula D1 may be used:

number

[0210] The parameters in the formula D1 are as follows: -n f :SFN -n frame,u slot : Number of slots per frame -SROFFSET :Slot offset -n u s,f : Slot number within the frame -SRperiodicity: SR transmission periodicity. The parameter SRperiodicity in SR corresponds to the transmission period of the terminal device 10, and is included in the SchedulingRequestResourceConfig IE as described above. The parameter SRperiodicity is set in units of the number of slots or the number of symbols. Formula D1 is used when the SRperiodicity is greater than one slot. In the following, an example will be described in which the parameter SRperiodicity is set in units of the number of slots, but the "number of slots" in the following description may be replaced with the "number of symbols."

[0211] For example, the base station device 20 may transmit to the terminal device 10 an RRC message including parameters related to SR for a certain serving cell (i.e., SchedulingRequestResourceConfig IE). That is, the parameters related to SR (i.e., SchedulingRequestResourceConfig IE) may be set for each of one or more serving cells. Furthermore, the base station device 20 may transmit to the terminal device 10 an RRC message including parameters related to SR for a certain UL-BWP (i.e., SchedulingRequestResourceConfig IE). That is, the parameters related to SR (i.e., SchedulingRequestResourceConfig IE) may be set for each of one or more UL-BWPs. The terminal device 10 may identify parameters related to SR for each of one or more UL-BWPs (i.e., SchedulingRequestResourceConfig IE).

[0212] The terminal device 10 determines an SR transmission opportunity at an SFN and slot number that satisfy formula D1. If the number of slots included in one cycle of the SFN is not an integer multiple of the number of slots (i.e., SR periodicity) that is the transmission period of the terminal device 10, the transmission period changes when the SFN is updated from 1023 to 0. Therefore, a problem occurs in that a constant transmission period cannot be maintained. Below, a mode for solving this problem will be described.

[0213] (1) First aspect As shown in FIG. 27, the control unit 210 of the base station device 20 transmits an RRC message including SR parameters to the terminal device 10 via the communication unit 220 (S2501). The control unit 110 of the terminal device 10 performs a periodic SR transmission operation using the following equation D2 (S2502). The control unit 210 of the base station device 20 performs a periodic SR reception operation using the following equation D2 (S2503). n corresponds to the above-mentioned first value. sfnOffset_4 is n f (i.e., SFN), and corresponds to the second value.

number

[0214] According to the above configuration, even if the SFN is updated from 1023 to 0, the terminal device 10 can transmit an SR to the base station device 20 at regular intervals. Furthermore, the base station device 20 can perform a receiving operation at regular intervals in accordance with the transmitting operation of the terminal device 10.

[0215] The base station device 20 transmits offset information related to sfnOffset_4 to the terminal device 10. The offset information related to sfnOffset_4 is referred to as "fourth offset information." The base station device 20 may transmit an RRC message including the fourth offset information to the terminal device 10. For example, the base station device 20 may set the fourth offset information for a serving cell and / or a UL-BWP for which an SR parameter is set. That is, the fourth offset information may be set for each of one or more serving cells. Also, the fourth offset information may be set for each of one or more UL-BWPs. The fourth offset information may be set as a new element of a SchedulingRequestResourceConfig IE. That is, the base station device 20 may transmit an RRC message including the fourth offset information for a certain serving cell and / or a certain UL-BWP to the terminal device 10. That is, the fourth offset information may be configured for each of one or more serving cells and / or each of one or more UL-BWPs (each of the serving cells and / or UL-BWPs for which an SR parameter is configured). The fourth offset information may be configured in an IE other than the SchedulingRequestResourceConfig IE. The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the fourth offset information to the terminal device 10. The base station device 20 may transmit DCI including the fourth offset information to the terminal device 10. That is, the base station device 20 may transmit the fourth offset information for a certain serving cell and / or a certain UL-BWP, and perform a PUCCH reception operation in the certain serving cell and / or the certain UL-BWP based on the fourth offset information.In addition, the terminal device 10 may receive the above-mentioned fourth offset information for a certain serving cell and / or a certain UL-BWP, and perform a PUCCH transmission operation in the certain serving cell and / or the certain UL-BWP based on the fourth offset information.

[0216] -Variation 1 Base station device 20 may be configured to switch between formulas. Control unit 210 of base station device 20 may select a formula in accordance with the transmission of the fourth offset information. As shown in FIG. 28 , if the fourth offset information has been transmitted (Yes in S2601), control unit 210 selects formula D2 (S2602). Control unit 210 performs a periodic reception operation using formula D2 (S2604). On the other hand, if the fourth offset information has not been transmitted (No in S2601), control unit 210 selects formula D1 (S2603). Control unit 210 performs a periodic reception operation using formula D1 (S2604).

[0217] -Variation 2 The terminal device 10 may be configured to switch between formulas. As shown in Fig. 29, the control unit 110 of the terminal device 10 determines whether or not the fourth offset information has been received from the base station device 20 (S2701). If the fourth offset information has been received (Yes in S2701), the control unit 110 selects Formula D2 (S2702). The control unit 110 performs a periodic transmission operation using Formula D2 (S2704). On the other hand, if the fourth offset information has not been received (No in S2701), the control unit 110 selects Formula D1 (S2703). The control unit 110 performs a periodic transmission operation using Formula D1 (S2704).

[0218] According to the above configuration, the terminal device 10 can select an appropriate mathematical formula in accordance with information from the base station device 20.

[0219] (2) Second aspect The control unit 110 of the terminal device 10 performs a periodic transmission operation using the following formula D3. The control unit 210 of the base station device 20 performs a periodic reception operation using the following formula D3. SFN_offset_4 corresponds to the second value above. SFN_offset_4 corresponds to the remainder when the number of slots included in one cycle of SFN is divided by the number of slots included in the transmission period of the terminal device 10 (i.e., SRperiodicity).

number

[0220] The control unit 210 of the base station device 20 calculates SFN_offset_4 based on SRperiodicity, which is an SR parameter. The control unit 110 of the terminal device 10 calculates SFN_offset_4 based on periodicityAndOffset included in the SchedulingRequestResourceConfig IE of the RRC message. With this configuration, the base station device 20 does not need to newly notify the terminal device 10 of SFN_offset_4 in addition to the SR parameter. This makes it possible to reduce signaling between the base station device 20 and the terminal device 10.

[0221] -Variation 1 The base station device 20 may transmit, to the terminal device 10, instruction information indicating the use of Mathematical Formula D3 (hereinafter also referred to as seventh instruction information, which may be information used to select Mathematical Formula D3). The base station device 20 may transmit, to the terminal device 10, an RRC message including the seventh instruction information. For example, the base station device 20 may set the seventh instruction information for a serving cell and / or a UL-BWP for which an SR parameter is set. That is, the seventh instruction information may be set for each of one or more cell groups. Also, the seventh instruction information may be set for each of one or more UL-BWPs. The seventh instruction information may be set as a new element of a SchedulingRequestResourceConfig IE. That is, the base station device 20 may transmit, to the terminal device 10, an RRC message including the seventh instruction information for a certain serving cell and / or a certain UL-BWP. That is, the seventh instruction information may be configured for each of one or more serving cells and / or each of one or more UL-BWPs (each of the serving cells and / or UL-BWPs for which the SR parameters are configured). The seventh instruction information may be configured in an IE other than the SchedulingRequestResourceConfig IE. The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the seventh instruction information to the terminal device 10. The base station device 20 may transmit DCI including the seventh instruction information to the terminal device 10. That is, the base station device 20 may transmit the seventh instruction information for a certain serving cell and / or a certain UL-BWP, and perform a PUCCH reception operation in the certain serving cell and / or the certain UL-BWP based on the seventh instruction information. In addition, the terminal device 10 may receive the above-mentioned seventh instruction information for a certain serving cell and / or a certain UL-BWP, and perform a PUCCH transmission operation in the certain serving cell and / or the certain UL-BWP based on the seventh instruction information.

[0222] -Variation 2 The base station device 20 may be configured to switch between formulas. The control unit 210 of the base station device 20 may select a formula in accordance with the transmission of the seventh instruction information. As shown in FIG. 30 , when the seventh instruction information is transmitted (Yes in S2801), the control unit 210 selects formula D3 (S2802). The control unit 210 executes a periodic reception operation using formula D3 (S2804). On the other hand, when the seventh instruction information is not transmitted (No in S2801), the control unit 210 selects formula D1 (S2803). The control unit 210 executes a periodic reception operation using formula D1 (S2804).

[0223] The control unit 210 of the base station device 20 may select one of Formula D1 and Formula D3 based on the value of SRperiodicity, which is an SR parameter. That is, the control unit 210 may select one of Formula D1 and Formula D3 based on the condition that the number of slots included in one cycle of the SFN is not an integer multiple of the number of slots in the transmission period of the terminal device 10 (i.e., SRperiodicity). For example, the control unit 210 may select Formula D3 when the above condition is met. For example, the control unit 210 may select Formula D1 when the above condition is not met. The above condition may be a condition that the base station device 20 has transmitted to the terminal device 10 setting information for the transmission period of the terminal device 10 (i.e., SRperiodicity), such that the number of slots included in one cycle of the SFN is not an integer multiple of the number of slots in the transmission period of the terminal device 10.

[0224] -Variation 3 The terminal device 10 may be configured to switch between mathematical formulas. As shown in Fig. 31, the control unit 110 of the terminal device 10 determines whether the following condition J1 is met (S2901). The condition J1 corresponds to a use condition for determining whether to use the mathematical formula D3. The condition J1 is one of the following conditions j11 to j12 or a combination of these two. j11: The terminal device 10 has received setting information of the transmission period of the terminal device 10 (ie, SR periodicity) in which the number of slots included in one cycle of the SFN is not an integer multiple of the number of slots which is the transmission period of the terminal device 10. j12: The terminal device 10 receives the seventh instruction information from the base station device 20.

[0225] If condition J1 is met (Yes in S2901), control unit 110 selects formula D3 (S2902). Control unit 110 executes a periodic transmission operation using formula D3 (S2904). On the other hand, if condition J1 is not met (No in S2901), control unit 110 selects formula D1 (S2903). Control unit 110 executes a periodic transmission operation using formula D1 (S2904).

[0226] According to the above configuration, the terminal device 10 can select an appropriate formula in accordance with the transmission period of the terminal device 10 and / or information from the base station device 20.

[0227] (3) Third aspect An example in which H-SFN is used (applied) will be described. The control unit 110 of the terminal device 10 performs a periodic transmission operation using the following mathematical formula D4. The control unit 210 of the base station device 20 performs a periodic reception operation using the following mathematical formula D4.

number

[0228] -Variation 1 The base station device 20 may transmit, to the terminal device 10, instruction information indicating the use of Mathematical Formula D4 (hereinafter also referred to as eighth instruction information, which may be information used to select Mathematical Formula D4). The base station device 20 may transmit, to the terminal device 10, an RRC message including the eighth instruction information. For example, the base station device 20 may set the eighth instruction information for a serving cell and / or a UL-BWP for which an SR parameter is set. That is, the eighth instruction information may be set for each of one or more cell groups. Also, the eighth instruction information may be set for each of one or more UL-BWPs. The eighth instruction information may be set as a new element of a SchedulingRequestResourceConfig IE. That is, the base station device 20 may transmit, to the terminal device 10, an RRC message including the eighth instruction information for a certain serving cell and / or a certain UL-BWP. That is, the eighth instruction information may be configured for each of one or more serving cells and / or each of one or more UL-BWPs (each of the serving cells and / or UL-BWPs for which the SR parameters are configured). The eighth instruction information may be configured in an IE other than the SchedulingRequestResourceConfig IE. The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the eighth instruction information to the terminal device 10. The base station device 20 may transmit DCI including the eighth instruction information to the terminal device 10. That is, the base station device 20 may transmit the eighth instruction information for a certain serving cell and / or a certain UL-BWP, and perform a PUCCH reception operation in the certain serving cell and / or the certain UL-BWP based on the eighth instruction information. In addition, the terminal device 10 may receive the above-mentioned eighth instruction information for a certain serving cell and / or a certain UL-BWP, and perform a PUCCH transmission operation in the certain serving cell and / or the certain UL-BWP based on the eighth instruction information.

[0229] -Variation 2 The base station device 20 may be configured to switch between formulas. As shown in FIG. 32, the control unit 210 of the base station device 20 determines whether the following condition J2 is met (S3001). The condition J2 corresponds to a use condition for determining whether to use the formula D4. The condition J2 is one or a combination of two or more selected from the following conditions j21 to j23. For example, the condition J2 may be a combination of j21 and j23. j21: The base station device 20 transmits the eighth instruction information to the terminal device 10. j22: The base station device 20 transmitted to the terminal device 10 setting information (i.e., SR periodicity) of the transmission period of the terminal device 10, in which the number of slots included in one cycle of the SFN is not an integer multiple of the number of slots in the transmission period of the terminal device 10. j23: The base station device 20 transmits information related to H-SFN to the terminal device 10. The information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (for example, SIB1).

[0230] If condition J2 is met (Yes in S3001), control unit 210 selects formula D4 (S3002). Control unit 210 executes a periodic reception operation using formula D4 (S3004). On the other hand, if condition J2 is not met (No in S3001), control unit 210 selects formula D1 (S3003). Control unit 210 executes a periodic reception operation using formula D1 (S3004).

[0231] -Variation 3 The terminal device 10 may be configured to switch between mathematical formulas. As shown in Fig. 33, the control unit 110 of the terminal device 10 determines whether the following condition J3 is met (S3101). The condition J3 corresponds to a use condition for determining whether to use mathematical formula D4. The condition J3 is one or a combination of two or more selected from the following conditions j31 to j33. For example, the condition J3 may be a combination of j32 and j33. j31: The terminal device 10 has received from the base station device 20 setting information (i.e., SR periodicity) of the transmission period of the terminal device 10, in which the number of slots included in one cycle of the SFN is not an integer multiple of the number of slots in the transmission period of the terminal device 10. j32: The terminal device 10 receives the eighth instruction information from the base station device 20. j33: The terminal device 10 receives information related to H-SFN from the base station device 20. The information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (e.g., SIB1).

[0232] If condition J3 is met (Yes in S3101), control unit 110 selects formula D4 (S3102). Control unit 110 executes a periodic transmission operation using formula D4 (S3104). On the other hand, if condition J3 is not met (No in S3101), control unit 110 selects formula D1 (S3103). Control unit 110 executes a periodic reception operation using formula D1 (S3104).

[0233] According to the above configuration, the terminal device 10 can select an appropriate formula in accordance with the SR transmission period and / or information from the base station device 20.

[0234] CG To determine the transmission opportunity in type 1 of CG, the following formula E1 may be used:

number

[0235] Also, the following formula F1 may be used to determine the transmission opportunity in type 2 of CG:

number

[0236] The parameters in the equations E1 and F1 are as follows: -numberOfSlotsPerFrame: The number of slots that make up one radio frame. -numberOfSymbolsPerSlot: The number of symbols that make up one slot. -timeReferenceSFN: The SFN used to determine the offset in the time domain, included in the ConfiguredGrantConfig IE. -timeDomainOffset: An offset relative to the SFN identified by the timeReferenceSFN, contained in the ConfiguredGrantConfig IE. - The start symbol identified by the timeDomainAllocation contained in the S:ConfiguredGrantConfig IE. -SFN start time : SFN of the first transmission opportunity when the uplink allocation is initialized or reinitialized. -Slot start time : The slot number of the first transmission opportunity when the uplink allocation is initialized or reinitialized. -Symbol start time : The symbol number of the first transmission opportunity when the uplink allocation is initialized or reinitialized. -periodicity: Uplink transmission periodicity. The parameter periodicity in the CG corresponds to the transmission period of the terminal device 10, and is included in the ConfiguredGrantConfig IE as described above. The parameter periodicity is set in units of the number of slots or the number of symbols. In the following description, an example will be described in which the parameter periodicity is set in units of the number of symbols, but the "number of symbols" in the following description may be replaced with the "number of slots."

[0237] For example, the base station device 20 may transmit to the terminal device 10 an RRC message including parameters related to CG for a certain serving cell (i.e., ConfiguredGrantConfig IE). That is, the parameters related to CG (i.e., ConfiguredGrantConfig IE) may be configured for each of one or more serving cells. Furthermore, the base station device 20 may transmit to the terminal device 10 an RRC message including parameters related to CG for a certain UL-BWP (i.e., ConfiguredGrantConfig IE). That is, the parameters related to CG (i.e., ConfiguredGrantConfig IE) may be configured for each of one or more UL-BWPs. The terminal device 10 may identify the parameters related to CG for each of one or more UL-BWPs (i.e., ConfiguredGrantConfig IE).

[0238] In CG type 1, the terminal device 10 allocates an SFN, slot number, and symbol number that satisfy formula E1 as resources for the Nth transmission. If the number of symbols included in one cycle of the SFN is not an integer multiple of the number of symbols in the transmission period of the terminal device 10 (i.e., the parameter periodicity), the transmission period changes when the SFN is updated from 1023 to 0. Therefore, a problem occurs in that a constant transmission period cannot be maintained. This problem also occurs in formula F1. Below, a mode for solving this problem will be described.

[0239] Type 1 (1) First aspect As shown in FIG. 34, the control unit 210 of the base station device 20 transmits an RRC message including CG parameters to the terminal device 10 via the communication unit 220 (S3201). The control unit 110 of the terminal device 10 performs a periodic transmission operation of the PUSCH using the following mathematical formula E2 (S3202). For example, the terminal device 10 may store the RRC message including the CG parameters as a configured uplink grant. Here, the RRC message including the CG parameters used for scheduling the PUSCH is also referred to as an uplink grant. Furthermore, after the uplink grant is configured for CG type 1, the terminal device 10 may consider that the N-th uplink grant is sequentially generated (repeated) in the SFN and / or slot number that satisfies mathematical formula E2. That is, the terminal device 10 may perform transmission of the PUSCH by considering that the stored uplink grant is sequentially generated in the SFN and / or slot number that satisfies mathematical formula E2. Similarly, the base station device 20 may receive a PUSCH by assuming that the uplink grants stored in the terminal device 10 are sequentially generated (repeated) in an SFN and / or slot number that satisfies mathematical formula E2. Hereinafter, the terminal device 10 receiving a PUSCH by assuming that the stored uplink grants are sequentially generated (repeated) based on a certain mathematical formula is also referred to as a PUSCH transmission operation using the mathematical formula (simply, a transmission operation). Here, the PUSCH transmission operation using the mathematical formula simply includes the terminal device 10 transmitting the PUSCH. Furthermore, the base station device 20 receiving a PUSCH by assuming that the uplink grants stored in the terminal device 10 are sequentially generated (repeated) based on a certain mathematical formula is also referred to as a PUSCH reception operation using the mathematical formula (simply, a reception operation). Here, the PUSCH reception operation using the mathematical formula simply includes the base station device 20 receiving the PUSCH.

[0240] The control unit 210 of the base station device 20 executes a periodic reception operation using the following mathematical formula E2 (S3203). n corresponds to the first value. sfnOffset_5 is a value for offsetting the SFN and corresponds to the second value.

number

[0241] According to the above configuration, the terminal device 10 can perform a transmission operation at a fixed cycle even when the SFN is updated from 1023 to 0. Furthermore, the base station device 20 can perform a reception operation at a fixed cycle in accordance with the transmission operation of the terminal device 10.

[0242] The base station device 20 transmits offset information related to sfnOffset_5 to the terminal device 10. The offset information related to sfnOffset_5 is referred to as "fifth offset information." The base station device 20 may transmit an RRC message including the fifth offset information to the terminal device 10. For example, the base station device 20 may configure the fifth offset information for a serving cell and / or a UL-BWP in which a CG parameter is configured. That is, the fifth offset information may be configured for each of one or more serving cells. Also, the fifth offset information may be configured for each of one or more UL-BWPs. The fifth offset information may be configured as a new element of a ConfiguredGrantConfig IE. That is, the base station device 20 may transmit an RRC message including the fifth offset information for a certain serving cell and / or a certain UL-BWP to the terminal device 10. That is, the fifth offset information may be configured for each of one or more serving cells and / or each of one or more UL-BWPs (each of the serving cells and / or UL-BWPs for which an SR parameter is configured). The fifth offset information may be configured in an IE other than the ConfiguredGrantConfig IE. The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the fifth offset information to the terminal device 10. The base station device 20 may transmit DCI including the fifth offset information to the terminal device 10. That is, the base station device 20 may transmit the fifth offset information for a certain serving cell and / or a certain UL-BWP, and perform a PUSCH reception operation in the certain serving cell and / or the certain UL-BWP based on the fifth offset information. In addition, the terminal device 10 may receive the above-mentioned fifth offset information for a certain serving cell and / or a certain UL-BWP, and perform a PUSCH transmission operation in the certain serving cell and / or the certain UL-BWP based on the fifth offset information.

[0243] -Variation 1 Base station device 20 may be configured to switch between formulas. Control unit 210 of base station device 20 may select a formula in accordance with transmission of the fifth offset information. As shown in FIG. 35, if the fifth offset information has been transmitted (Yes in S3301), control unit 210 selects formula E2 (S3302). Control unit 210 performs a periodic reception operation using formula E2 (S3304). On the other hand, if the fifth offset information has not been transmitted (No in S3301), control unit 210 selects formula E1 (S3303). Control unit 210 performs a periodic reception operation using formula E1 (S3304).

[0244] -Variation 2 The terminal device 10 may be configured to switch the formula. As shown in FIG. 36, the control unit 110 of the terminal device 10 determines whether or not the fifth offset information has been received from the base station device 20 (S3401). If the fifth offset information has been received (Yes in S3401), the control unit 110 selects formula E2 (S3402). The control unit 110 executes a periodic transmission operation using formula E2 (S3404). In response to this, the control unit 110 selects formula E2 (S3405). No. If offset information No. 5 has not been received (No in S3401), control unit 110 selects formula E1 (S3403).Control unit 110 executes a periodic transmission operation using formula E1 (S3404).

[0245] According to the above configuration, the terminal device 10 can select an appropriate mathematical formula in accordance with information from the base station device 20.

[0246] (2) Second aspect The control unit 110 of the terminal device 10 performs a periodic transmission operation using the following mathematical formula E3. The control unit 210 of the base station device 20 performs a periodic reception operation using the following mathematical formula E3. SFN_offset_5 corresponds to the second value described above. SFN_offset_5 corresponds to the remainder when the number of symbols included in one SFN cycle is divided by the number of symbols included in the transmission period of the terminal device 10.

number

[0247] The control unit 210 of the base station device 20 calculates SFN_offset_5 based on the periodicity parameter of the CG. The control unit 110 of the terminal device 10 calculates SFN_offset_5 based on the periodicity parameter included in the ConfiguredGrantConfig IE of the RRC message. With this configuration, the base station device 20 does not need to newly notify the terminal device 10 of SFN_offset_5 in addition to the CG parameter. This makes it possible to reduce signaling between the base station device 20 and the terminal device 10.

[0248] -Variation 1 The control unit 210 of the base station device 20 may transmit, to the terminal device 10, instruction information indicating the use of Mathematical Formula E3 (hereinafter also referred to as ninth instruction information, which may be information used to select Mathematical Formula E3). The control unit 210 may transmit, to the terminal device 10, an RRC message including the ninth instruction information. For example, the base station device 20 may set the ninth instruction information for a serving cell and / or a UL-BWP for which a CG parameter is set. That is, the ninth instruction information may be set for each of one or more cell groups. Also, the ninth instruction information may be set for each of one or more UL-BWPs. The ninth instruction information may be set as a new element of a ConfiguredGrantConfig IE. That is, the base station device 20 may transmit, to the terminal device 10, an RRC message including the ninth instruction information for a certain serving cell and / or a certain UL-BWP. That is, the ninth instruction information may be configured for each of one or more serving cells and / or each of one or more UL-BWPs (each of the serving cells and / or UL-BWPs for which the SR parameters are configured). The ninth instruction information may be configured in an IE other than the ConfiguredGrantConfig IE. The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the ninth instruction information to the terminal device 10. The base station device 20 may transmit DCI including the ninth instruction information to the terminal device 10. That is, the base station device 20 may transmit the ninth instruction information for a certain serving cell and / or a certain UL-BWP, and perform a PUSCH reception operation in the certain serving cell and / or the certain UL-BWP based on the ninth instruction information. In addition, the terminal device 10 may receive the above-mentioned ninth instruction information for a certain serving cell and / or a certain UL-BWP, and perform a PUSCH transmission operation in the certain serving cell and / or the certain UL-BWP based on the ninth instruction information.

[0249] -Variation 2 The base station device 20 may be configured to switch the formula. The control unit 210 of the base station device 20 may select a formula in accordance with the transmission of the ninth instruction information. As shown in FIG. 37 , when the ninth instruction information is transmitted (Yes in S3501), the control unit 210 selects formula E3 (S3502). The control unit 210 executes a periodic reception operation using formula E3 (S3504). On the other hand, when the ninth instruction information is not transmitted (No in S3501), the control unit 210 selects formula E1 (S3503). The control unit 210 executes a periodic reception operation using formula E1 (S3504).

[0250] The control unit 210 of the base station device 20 may select one of the formulas E1 and E3 based on the CG parameter periodicity. That is, the control unit 210 may select one of the formulas E1 and E3 based on the condition that the number of symbols included in one SFN cycle is not an integer multiple of the number of symbols (i.e., the periodicity) that is the transmission period of the terminal device 10. For example, the control unit 210 may select the formula E3 when the above condition is met. For example, the control unit 210 may select the formula E1 when the above condition is not met. The above condition may be that the base station device 20 has transmitted to the terminal device 10 setting information (i.e., the periodicity parameter) for the transmission period of the terminal device 10, such that the number of symbols included in one SFN cycle is not an integer multiple of the number of symbols that is the transmission period of the terminal device 10.

[0251] -Variation 3 The terminal device 10 may be configured to switch between mathematical formulas. As shown in Fig. 38, the control unit 110 of the terminal device 10 determines whether the following condition K1 is met (S3601). Condition K1 corresponds to a use condition for determining whether to use mathematical formula E3. Condition K1 is one of the following conditions k11 to k12 or a combination of these two: k11: The terminal device 10 has received setting information of the transmission period of the terminal device 10 (ie, the parameter periodicity) in which the number of symbols included in one cycle of the SFN is not an integer multiple of the number of symbols that is the transmission period of the terminal device 10. k12: The terminal device 10 receives the ninth instruction information from the base station device 20.

[0252] If condition K1 is met (Yes in S3601), control unit 110 selects formula E3 (S3602). Control unit 110 executes a periodic transmission operation using formula E3 (S3604). On the other hand, if condition K1 is not met (No in S3601), control unit 110 selects formula E1 (S3603). Control unit 110 executes a periodic transmission operation using formula E1 (S3604).

[0253] According to the above configuration, the terminal device 10 can select an appropriate formula in accordance with the transmission period of the terminal device 10 and / or information from the base station device 20.

[0254] (3) Third aspect An example in which H-SFN is used (applied) will be described. The control unit 110 of the terminal device 10 performs a periodic transmission operation using the following mathematical formula E4. The control unit 210 of the base station device 20 performs a periodic reception operation using the following mathematical formula E4.

number

[0255] -Variation 1 The base station device 20 may transmit, to the terminal device 10, instruction information indicating the use of Mathematical Formula E4 (hereinafter also referred to as tenth instruction information, which may be information used to select Mathematical Formula E4). The base station device 20 may transmit, to the terminal device 10, an RRC message including the tenth instruction information. For example, the base station device 20 may set the tenth instruction information for a serving cell and / or a UL-BWP for which a CG parameter is set. That is, the tenth instruction information may be set for each of one or more cell groups. Also, the tenth instruction information may be set for each of one or more UL-BWPs. The tenth instruction information may be set as a new element of a ConfiguredGrantConfig IE. That is, the base station device 20 may transmit, to the terminal device 10, an RRC message including the tenth instruction information for a certain serving cell and / or a certain UL-BWP. That is, the tenth instruction information may be configured for each of one or more serving cells and / or each of one or more UL-BWPs (each of the serving cells and / or UL-BWPs for which the SR parameters are configured). The tenth instruction information may be configured in an IE other than the ConfiguredGrantConfig IE. The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the tenth instruction information to the terminal device 10. The base station device 20 may transmit DCI including the tenth instruction information to the terminal device 10. That is, the base station device 20 may transmit the tenth instruction information for a certain serving cell and / or a certain UL-BWP, and perform a PUSCH reception operation in the certain serving cell and / or the certain UL-BWP based on the tenth instruction information. In addition, the terminal device 10 may receive the above-mentioned 10th instruction information for a certain serving cell and / or a certain UL-BWP, and perform a PUSCH transmission operation in the certain serving cell and / or the certain UL-BWP based on the 10th instruction information.

[0256] -Variation 2 The base station device 20 may be configured to switch between mathematical formulas. As shown in Fig. 39, the control unit 210 of the base station device 20 determines whether the following condition K2 is met (S3701). The condition K2 is one or a combination of two or more selected from the following conditions k21 to k23. For example, the condition K2 may be a combination of k21 and k23. k21: The base station device 20 transmits the tenth instruction information to the terminal device 10. k22: The base station device 20 has transmitted to the terminal device 10 setting information (i.e., the parameter periodicity) of the transmission period of the terminal device 10, in which the number of symbols included in one cycle of the SFN is not an integer multiple of the number of symbols that is the transmission period of the terminal device 10. k23: The base station device 20 transmits information related to H-SFN to the terminal device 10. The information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (for example, SIB1).

[0257] If condition K2 is met (Yes in S3701), control unit 210 selects formula E4 (S3702). Control unit 210 executes a periodic reception operation using formula E4 (S3704). On the other hand, if condition K2 is not met (No in S3701), control unit 210 selects formula E1 (S3703). Control unit 210 executes a periodic reception operation using formula E1 (S3704).

[0258] -Variation 3 The terminal device 10 may be configured to switch between mathematical formulas. As shown in Fig. 40, the control unit 110 of the terminal device 10 determines whether the following condition K3 is met (S3801). Condition K3 corresponds to a use condition for determining whether to use mathematical formula E4. Condition K3 is one or a combination of two or more selected from the following conditions k31 to k33. For example, condition K3 may be a combination of k32 and k33. k31: The terminal device 10 has received from the base station device 20 setting information on the transmission period of the terminal device 10 (i.e., the parameter periodicity) in which the number of symbols included in one cycle of the SFN is not an integer multiple of the number of symbols that is the transmission period of the terminal device 10. k32: The terminal device 10 receives the tenth instruction information from the base station device 20. k33: The terminal device 10 receives information related to H-SFN from the base station device 20. The information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (for example, SIB1).

[0259] If condition K3 is met (Yes in S3801), control unit 110 selects formula E4 (S3802). Control unit 110 executes a periodic transmission operation using formula E4 (S3804). On the other hand, if condition K3 is not met (No in S3801), control unit 110 selects formula E1 (S3803). Control unit 110 executes a periodic reception operation using formula E1 (S3804).

[0260] According to the above configuration, the terminal device 10 can select an appropriate formula in accordance with the transmission period of the terminal device 10 and / or information from the base station device 20.

[0261] Type 2 (1) First aspect 41, the control unit 210 of the base station device 20 transmits an RRC message including CG parameters to the terminal device 10 via the communication unit 220 (S3901). The control unit 210 transmits DCI scrambled with the CS-RNTI to the terminal device 10 via the communication unit 220 (S3902). This activates periodic transmission operations by the terminal device 10 using the PUSCH.

[0262] The control unit 110 of the terminal device 100 performs a periodic transmission operation using the following mathematical formula F2 (S3903). For example, when DCI to which a CRC scrambled by the CS-RNTI is added (i.e., DCI used for scheduling the PUSCH) indicates CG activation (i.e., when the PDCCH indicates CG activation), the terminal device 10 may store the DCI as a configured uplink grant. Here, the DCI (DCI format) used for scheduling the PUSCH is also referred to as an uplink grant. Furthermore, after an uplink grant is configured for CG type 2, the terminal device 10 may consider that an N-th uplink grant occurs sequentially (is repeated) in an SFN and / or a slot number that satisfies mathematical formula F2. That is, the terminal device 10 may perform a PUSCH transmission operation by considering that the stored uplink grants occur sequentially in an SFN and / or a slot number that satisfies mathematical formula F2. Similarly, the base station device 20 may perform a PUSCH reception operation by assuming that the uplink grants stored in the terminal device 10 are sequentially generated (repeated) for the SFN and / or slot number that satisfies formula F2.

[0263] The control unit 210 of the base station device 20 executes a periodic reception operation using the following mathematical formula F2 (S3904). n corresponds to the first value. sfnOffset_6 is a value for offsetting the SFN and corresponds to the second value.

number

[0264] According to the above configuration, the terminal device 10 can perform a transmission operation at a fixed cycle even when the SFN is updated from 1023 to 0. Furthermore, the base station device 20 can perform a reception operation at a fixed cycle in accordance with the transmission operation of the terminal device 10.

[0265] The base station device 20 transmits offset information related to sfnOffset_6 to the terminal device 10. The offset information related to sfnOffset_6 is referred to as "sixth offset information." The base station device 20 may transmit an RRC message including the sixth offset information to the terminal device 10. For example, the base station device 20 may configure the sixth offset information for a serving cell and / or a UL-BWP in which a CG parameter is configured. That is, the sixth offset information may be configured for each of one or more serving cells. Also, the sixth offset information may be configured for each of one or more UL-BWPs. The sixth offset information may be configured as a new element of a ConfiguredGrantConfig IE. That is, the base station device 20 may transmit an RRC message including the sixth offset information for a certain serving cell and / or a certain UL-BWP to the terminal device 10. That is, the sixth offset information may be configured for each of one or more serving cells and / or each of one or more UL-BWPs (each of the serving cells and / or UL-BWPs for which an SR parameter is configured). The sixth offset information may be configured in an IE other than the ConfiguredGrantConfig IE. The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the sixth offset information to the terminal device 10. The base station device 20 may transmit DCI including the sixth offset information to the terminal device 10. That is, the base station device 20 may transmit the sixth offset information for a certain serving cell and / or a certain UL-BWP, and perform a receiving operation of a PUSCH in the certain serving cell and / or the certain UL-BWP based on the sixth offset information. In addition, the terminal device 10 may receive the sixth offset information for a certain serving cell and / or a certain UL-BWP, and perform a PUSCH transmission operation in the certain serving cell and / or the certain UL-BWP based on the sixth offset information.

[0266] -Variation 1 The base station device 20 may be configured to switch between formulas. The control unit 210 of the base station device 20 may select a formula in accordance with the transmission of the sixth offset information. As shown in FIG. 42 , if the sixth offset information has been transmitted (Yes in S4001), the control unit 210 selects formula F2 (S4002). The control unit 210 performs a periodic reception operation using formula F2 (S4004). On the other hand, if the sixth offset information has not been transmitted (No in S4001), the control unit 210 selects formula F1 (S4003). The control unit 210 performs a periodic reception operation using formula F1 (S4004).

[0267] -Variation 2 The terminal device 10 may be configured to switch between formulas. As shown in FIG. 43, the control unit 110 of the terminal device 10 determines whether or not the sixth offset information has been received from the base station device 20 (S4101). If the sixth offset information has been received (Yes in S4101), the control unit 110 selects formula F2 (S4102). The control unit 110 performs a periodic transmission operation using formula F2 (S4104). On the other hand, if the sixth offset information has not been received (No in S4101), the control unit 110 selects formula F1 (S4103). The control unit 110 performs a periodic transmission operation using formula F1 (S4104).

[0268] According to the above configuration, the terminal device 10 can select an appropriate mathematical formula in accordance with information from the base station device 20.

[0269] (2) Second aspect The control unit 110 of the terminal device 10 performs a periodic transmission operation using the following formula F3. The control unit 210 of the base station device 20 performs a periodic reception operation using the following formula F3. SFN_offset_6 corresponds to the second value described above. SFN_offset_6 corresponds to the remainder when the number of symbols included in one SFN cycle is divided by the number of symbols included in the transmission period of the terminal device 10.

number

[0270] The control unit 210 of the base station device 20 calculates SFN_offset_6 based on the periodicity, which is a CG parameter. The control unit 110 of the terminal device 10 calculates SFN_offset_6 based on the periodicity included in the ConfiguredGrantConfig IE of the RRC message. With this configuration, the base station device 20 does not need to newly notify the terminal device 10 of SFN_offset_6 in addition to the CG parameter. This makes it possible to reduce signaling between the base station device 20 and the terminal device 10.

[0271] -Variation 1 The base station device 20 may transmit, to the terminal device 10, instruction information indicating the use of Formula F3 (hereinafter also referred to as eleventh instruction information, which may be information used to select Formula F3). The control unit 210 may transmit, to the terminal device 10, an RRC message including the eleventh instruction information. For example, the base station device 20 may set the eleventh instruction information for a serving cell and / or a UL-BWP for which a CG parameter is set. That is, the eleventh instruction information may be set for each of one or more cell groups. Also, the eleventh instruction information may be set for each of one or more UL-BWPs. The eleventh instruction information may be set as a new element of a ConfiguredGrantConfig IE. That is, the base station device 20 may transmit, to the terminal device 10, an RRC message including the eleventh instruction information for a certain serving cell and / or a certain UL-BWP. That is, the 11th instruction information may be configured for each of one or more serving cells and / or each of one or more UL-BWPs (each of the serving cells and / or UL-BWPs for which the SR parameters are configured). The 11th instruction information may be configured in an IE other than the ConfiguredGrantConfig IE. The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the 11th instruction information to the terminal device 10. The base station device 20 may transmit DCI including the 11th instruction information to the terminal device 10. That is, the base station device 20 may transmit the 11th instruction information for a certain serving cell and / or a certain UL-BWP, and perform a PUSCH reception operation in the certain serving cell and / or the certain UL-BWP based on the 11th instruction information. In addition, the terminal device 10 may receive the above-mentioned 11th instruction information for a certain serving cell and / or a certain UL-BWP, and perform a PUSCH transmission operation in the certain serving cell and / or the certain UL-BWP based on the 11th instruction information.

[0272] -Variation 2 The base station device 20 may be configured to switch between formulas. The control unit 210 of the base station device 20 may select a formula in accordance with the transmission of the eleventh instruction information. As shown in FIG. 44 , when the eleventh instruction information is transmitted (Yes in S4201), the control unit 210 selects formula F3 (S4202). The control unit 210 executes a periodic reception operation using formula F3 (S4204). On the other hand, when the eleventh instruction information is not transmitted (No in S4201), the control unit 210 selects formula F1 (S4203). The control unit 210 executes a periodic reception operation using formula F1 (S4204).

[0273] The control unit 210 of the base station device 20 may select one of the formulas F1 and F3 based on the periodicity, which is a CG parameter. That is, the control unit 210 may select one of the formulas F1 and F3 based on the condition that the number of symbols included in one SFN cycle is not an integer multiple of the number of symbols (i.e., the periodicity), which is the transmission period of the terminal device 10. For example, the control unit 210 may select the formula F3 if the above condition is met. For example, the control unit 210 may select the formula F1 if the above condition is not met. The above condition may be that the base station device 20 has transmitted to the terminal device 10 setting information for the transmission period of the terminal device 10 (i.e., the periodicity parameter), which does not cause the number of symbols included in one SFN cycle to be an integer multiple of the number of symbols (i.e., the periodicity parameter).

[0274] -Variation 3 The terminal device 10 may be configured to switch between mathematical formulas. As shown in Fig. 45, the control unit 110 of the terminal device 10 determines whether the following condition K4 is met (S4301). Condition K4 corresponds to a use condition for determining whether to use mathematical formula F3. Condition K4 is one of the following conditions k41 to k42 or a combination of these two. k41: The terminal device 10 has received setting information of the transmission period of the terminal device 10 (ie, parameter periodicity) in which the number of symbols included in one cycle of the SFN is not an integer multiple of the number of symbols that is the transmission period of the terminal device 10. k42: The terminal device 10 receives the eleventh instruction information from the base station device 20.

[0275] If condition K4 is met (Yes in S4301), control unit 110 selects formula F3 (S4302). Control unit 110 executes a periodic transmission operation using formula F3 (S4304). On the other hand, if condition K4 is not met (No in S4301), control unit 110 selects formula F1 (S4303). Control unit 110 executes a periodic transmission operation using formula F1 (S4304).

[0276] According to the above configuration, the terminal device 10 can select an appropriate formula in accordance with the transmission period of the terminal device 10 and / or information from the base station device 20.

[0277] (3) Third aspect An example in which H-SFN is used (applied) will be described. The control unit 110 of the terminal device 10 performs a periodic transmission operation using the following formula F4. The control unit 210 of the base station device 20 performs a periodic reception operation using the following formula F4.

number

[0278] -Variation 1 The base station device 20 may transmit, to the terminal device 10, instruction information indicating the use of Formula F4 (hereinafter also referred to as twelfth instruction information, which may be information used to select Formula F4). The base station device 20 may transmit, to the terminal device 10, an RRC message including the twelfth instruction information. For example, the base station device 20 may set the twelfth instruction information for a serving cell and / or a UL-BWP for which a CG parameter is set. That is, the twelfth instruction information may be set for each of one or more cell groups. Also, the twelfth instruction information may be set for each of one or more UL-BWPs. The twelfth instruction information may be set as a new element of a ConfiguredGrantConfig IE. That is, the base station device 20 may transmit, to the terminal device 10, an RRC message including the twelfth instruction information for a certain serving cell and / or a certain UL-BWP. That is, the 12th instruction information may be configured for each of one or more serving cells and / or each of one or more UL-BWPs (each of the serving cells and / or UL-BWPs for which the SR parameters are configured). The 12th instruction information may be configured in an IE other than the ConfiguredGrantConfig IE. The base station device 20 may transmit system information (SI, for example, SIB1 and / or an SIB other than SIB1) including the 12th instruction information to the terminal device 10. The base station device 20 may transmit DCI including the 12th instruction information to the terminal device 10. That is, the base station device 20 may transmit the 12th instruction information for a certain serving cell and / or a certain UL-BWP, and perform a PUSCH reception operation in the certain serving cell and / or the certain UL-BWP based on the 12th instruction information. In addition, the terminal device 10 may receive the above-mentioned 12th instruction information for a certain serving cell and / or a certain UL-BWP, and perform a PUSCH transmission operation in the certain serving cell and / or the certain UL-BWP based on the 12th instruction information.

[0279] -Variation 2 The base station device 20 may be configured to switch between formulas. As shown in FIG. 46, the control unit 210 of the base station device 20 determines whether the following condition K5 is met (S4401). Condition K5 corresponds to a use condition for determining whether to use formula F4. Condition K5 is one or a combination of two or more selected from the following conditions k51 to k53. For example, condition K5 may be a combination of k51 and k53. k51: The base station device 20 transmits the twelfth instruction information to the terminal device 10. k52: The base station device 20 transmits to the terminal device 10 setting information (i.e., the parameter periodicity) of the transmission period of the terminal device 10, in which the number of symbols included in one cycle of the SFN is not an integer multiple of the number of symbols that is the transmission period of the terminal device 10. k53: The base station device 20 transmits information related to H-SFN to the terminal device 10. The information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (for example, SIB1).

[0280] If condition K5 is met (Yes in S4401), control unit 210 selects formula F4 (S4402). Control unit 210 executes a periodic reception operation using formula F4 (S4404). On the other hand, if condition K5 is not met (No in S4401), control unit 210 selects formula F1 (S4403). Control unit 210 executes a periodic reception operation using formula F1 (S4404).

[0281] -Variation 3 The terminal device 10 may be configured to switch between mathematical formulas. As shown in Fig. 47, the control unit 110 of the terminal device 10 determines whether the following condition K6 is met (S4501). Condition K6 corresponds to a use condition for determining whether to use mathematical formula F4. Condition K6 is one or a combination of two or more selected from the following conditions k61 to k63. For example, condition K6 may be a combination of k62 and k63. k61: The terminal device 10 has received from the base station device 20 setting information on the transmission period of the terminal device 10 (i.e., the parameter periodicity) in which the number of symbols included in one cycle of the SFN is not an integer multiple of the number of symbols that is the transmission period of the terminal device 10. k62: The terminal device 10 receives the twelfth instruction information from the base station device 20. k63: The terminal device 10 receives information related to H-SFN from the base station device 20. The information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (for example, SIB1).

[0282] If condition K6 is met (Yes in S4501), control unit 110 selects formula F4 (S4502). Control unit 110 executes a periodic transmission operation using formula F4 (S4504). On the other hand, if condition K6 is not met (No in S4501), control unit 110 selects formula F1 (S4503). Control unit 110 executes a periodic transmission operation using formula F1 (S4504).

[0283] According to the above configuration, the terminal device 10 can select an appropriate mathematical formula in accordance with the period of the terminal device 10 and / or information from the base station device 20.

[0284] 3. Variations Although the present disclosure has been described based on the above embodiment, it is understood that the present disclosure is not limited to the embodiment or structure. The present disclosure also encompasses various modifications and modifications within the equivalent range. Other combinations including one or more elements included in the above embodiment are also within the scope and spirit of the present disclosure.

[0285] The above-mentioned "instruction information indicating the use of a mathematical formula" may be interpreted as "instruction information indicating whether or not to use a mathematical formula" throughout this specification. The "instruction information indicating whether or not to use a mathematical formula" is a concept that encompasses "information indicating the use of a mathematical formula" and "information indicating not to use a mathematical formula." The terminal device 10 and the base station device 20 may perform the various operations described above in accordance with the instruction information indicating whether or not to use a mathematical formula.

[0286] The words, phrases, and other expressions used in the above embodiments are merely examples and may be replaced with substantially identical or similar expressions. In particular, since the technology according to the above embodiments relates to technical specifications, the expressions in the above embodiments may be replaced with substantially identical or similar expressions in technical specifications (e.g., technical specifications cited in this specification).

[0287] The information transmitted and received in the above embodiment may be contained in the same or a different message or element already described in the technical specifications, or may be contained in a newly defined message or element. The information transmitted and received in the above embodiment may be transmitted and received using a different layer and / or a different channel than those in the above embodiment.

[0288] The means and / or functions provided by the devices described in the above embodiments can be provided by software recorded in a tangible memory device and a computer that executes the software, software alone, hardware alone, or a combination thereof. For example, if any of the above devices is provided by electronic circuits that are hardware, it can be provided by digital circuits including a large number of logic circuits, or analog circuits.

[0289] The device described in the above embodiment executes a program stored in a non-transitory tangible storage medium, and the execution of the program executes a method corresponding to the program.

[0290] 4. Additional Notes Some or all of the above embodiments and modified examples may be described as, but are not limited to, the following notes. Hereinafter, a relationship is expressed in which a note that is subordinate to multiple notes is subordinate to another note that is subordinate to multiple notes. All of the following subordinate relationships of notes are included in the above embodiments.

[0291] (Appendix 1) A control unit (110); a communication unit (120) configured to communicate wirelessly by being controlled by the control unit; A terminal device (10) comprising: The control unit configured to perform a periodic operation of transmission or reception via the communication unit using a formula including a correction value for a System Frame Number (SFN); Terminal device.

[0292] (Appendix 2) The correction value is a value that does not become zero even when the SFN is updated from a predetermined maximum value to a predetermined initial value. 10. The terminal device according to claim 1.

[0293] (Appendix 3) The correction value is a value that increases with the number of times the SFN is updated from the maximum value to the initial value. 10. A terminal device as described in Appendix 2.

[0294] (Appendix 4) The control unit is further configured to calculate the correction value using a first value corresponding to the number of times and a second value for offsetting the SFN. 4. A terminal device as described in Appendix 3.

[0295] (Appendix 5) the control unit is further configured to, when receiving information regarding the second value from the base station device via the communication unit, execute the periodic operation using the formula. 5. A terminal device as described in Appendix 4.

[0296] (Appendix 6) The periodicity of the periodic operation is set in units of time; the control unit is configured to calculate, as the second value, a remainder obtained by dividing a time length of one cycle of the SFN by a time length of the period of the periodic operation. 5. A terminal device as described in Appendix 4.

[0297] (Appendix 7) The periodicity of the periodic operation is set in units of slots; the control unit is configured to calculate, as the second value, a remainder obtained by dividing the number of slots included in one cycle of the SFN by the number of slots included in the cycle of the periodic operation. 5. A terminal device as described in Appendix 4.

[0298] (Appendix 8) The periodicity of the periodic operation is set in units of a number of symbols; the control unit is configured to calculate, as the second value, a remainder obtained by dividing the number of symbols included in one cycle of the SFN by the number of symbols included in the cycle of the periodic operation. 5. A terminal device as described in Appendix 4.

[0299] (Appendix 9) The periodicity of the periodic operation is set in units of time; the control unit is further configured to execute the periodic operation using the mathematical formula when a use condition related to the mathematical formula is satisfied; The conditions of use are: a condition that the time length of one cycle of the SFN is not an integer multiple of the time length of the period of the periodic operation; the condition that the period of the periodic motion is a non-integer value; and a condition that the control unit receives, from a base station device, information indicating that the mathematical formula is used; One or a combination of two or more selected from 5. A terminal device according to any one of Supplementary notes 1 to 4.

[0300] (Appendix 10) The periodicity of the periodic operation is set in units of slots; the control unit is further configured to execute the periodic operation using the mathematical formula when a use condition related to the mathematical formula is satisfied; The conditions of use are: The number of slots included in one cycle of the SFN is not an integer multiple of the number of slots included in the cycle of the periodic operation; and a condition that the control unit receives, from a base station device, information indicating that the mathematical formula is used; or a combination of the two, 5. A terminal device according to any one of Supplementary notes 1 to 4.

[0301] (Appendix 11) The periodicity of the periodic operation is set in units of a number of symbols; the control unit is further configured to execute the periodic operation using the mathematical formula when a use condition related to the mathematical formula is satisfied; The conditions of use are: The number of symbols included in one cycle of the SFN is not an integer multiple of the number of symbols included in the cycle of the periodic operation; and a condition that the control unit receives, from a base station device, information indicating that the mathematical formula is used; or a combination of the two, 5. A terminal device according to any one of Supplementary notes 1 to 4.

[0302] (Appendix 12) The formula is a first formula, the control unit is further configured to perform the periodic operation using a second mathematical formula that does not include the correction value; the control unit is configured to execute the periodic operation using the second mathematical formula when the use condition is not met. 12. A terminal device according to any one of Supplementary Notes 9 to 11.

[0303] (Appendix 13) The control unit is further configured to calculate the correction value using a Hyper SFN (H-SFN) and a value corresponding to the number of SFNs included in one cycle of the H-SFN. 4. A terminal device according to claim 2 or 3.

[0304] (Appendix 14) The periodicity of the periodic operation is set in units of time; the control unit is further configured to execute the periodic operation using the mathematical formula when a use condition related to the mathematical formula is satisfied; The conditions of use are: a condition that the time length of one cycle of the SFN is not an integer multiple of the time length of the period of the periodic operation; the condition that the period of the periodic motion is a non-integer value; a condition that the control unit receives information indicating the use of the formula from a base station device; and a condition that the control unit receives information related to the H-SFN from the base station device; One or a combination of two or more selected from 14. The terminal device of claim 13.

[0305] (Appendix 15) The periodicity of the periodic operation is set in units of slots; the control unit is further configured to execute the periodic operation using the mathematical formula when a use condition related to the mathematical formula is satisfied; The conditions of use are: a condition that the number of slots included in one cycle of the SFN is not an integer multiple of the number of slots included in the cycle of the periodic operation; a condition that the control unit receives information indicating the use of the formula from a base station device; and a condition that the control unit receives information related to the H-SFN from the base station device; One or a combination of two or more selected from 14. The terminal device of claim 13.

[0306] (Appendix 16) The periodicity of the periodic operation is set in units of a number of symbols; the control unit is further configured to execute the periodic operation using the mathematical formula when a use condition related to the mathematical formula is satisfied; The conditions of use are: a condition that the number of symbols included in one cycle of the SFN is not an integer multiple of the number of symbols included in the cycle of the periodic operation; a condition that the control unit receives information indicating the use of the formula from a base station device; and a condition that the control unit receives information related to the H-SFN from the base station device; One or a combination of two or more selected from 14. The terminal device of claim 13.

[0307] (Appendix 17) determining whether a formula including a correction value for a System Frame Number (SFN) holds; performing a periodic operation of transmitting or receiving if the formula is true; A method for a terminal device (10) comprising:

[0308] (Appendix 18) The terminal device (10) determining whether a formula including a correction value for a System Frame Number (SFN) holds; If the formula is satisfied, a periodic operation of transmission or reception is performed. program.

[0309] (Appendix 19) The terminal device (10) determining whether a formula including a correction value for a System Frame Number (SFN) holds; If the formula is satisfied, a periodic operation of transmission or reception is performed. A non-transient tangible recording medium on which a program is recorded.

[0310] (Appendix 20) A control unit (210); a communication unit (220) configured to communicate wirelessly by being controlled by the control unit; A base station device (20) comprising: The control unit configured to perform a periodic operation of transmission or reception via the communication unit using a formula including a correction value for a System Frame Number (SFN); Base station equipment.

[0311] (Appendix 21) The correction value is a value that does not become zero even when the SFN is updated from a predetermined maximum value to a predetermined initial value. 21. The base station apparatus according to claim 20.

[0312] (Appendix 22) The correction value is a value that increases with the number of times the SFN is updated from the maximum value to the initial value. 22. The base station apparatus according to claim 21.

[0313] (Appendix 23) The control unit is further configured to calculate the correction value using a first value corresponding to the number of times and a second value for offsetting the SFN. 23. The base station apparatus according to claim 22.

[0314] (Appendix 24) The periodicity of the periodic operation is set in units of time; the control unit is configured to calculate, as the second value, a remainder obtained by dividing a time length of one cycle of the SFN by a time length of the period of the periodic operation. 24. The base station apparatus according to claim 23.

[0315] (Appendix 25) The periodicity of the periodic operation is set in units of slots; the control unit is configured to calculate, as the second value, a remainder obtained by dividing the number of slots included in one cycle of the SFN by the number of slots included in the cycle of the periodic operation. 24. The base station apparatus according to claim 23.

[0316] (Appendix 26) The periodicity of the periodic operation is set in units of a number of symbols; the control unit is configured to calculate, as the second value, a remainder obtained by dividing the number of symbols included in one cycle of the SFN by the number of symbols included in the cycle of the periodic operation. 24. The base station apparatus according to claim 23.

[0317] (Appendix 27) The control unit is further configured to execute the periodic operation using the formula when information related to the second value is transmitted to the terminal device via the communication unit. 24. The base station apparatus according to claim 23.

[0318] (Appendix 28) the control unit is further configured to, when information indicating use of the mathematical formula is transmitted to the terminal device via the communication unit, execute the periodic operation using the mathematical formula. 24. The base station device according to claim 20.

[0319] (Appendix 29) The control unit is further configured to calculate the correction value using a Hyper SFN (H-SFN) and a value corresponding to the number of SFNs included in one cycle of the H-SFN. 23. The base station device according to claim 21 or 22.

[0320] (Appendix 30) the control unit is further configured to execute the periodic operation using the mathematical formula when a use condition related to the mathematical formula is satisfied; The conditions of use are: a condition that the control unit has transmitted information indicating that the mathematical formula is used to a terminal device; and a condition that the control unit has transmitted information related to the H-SFN to the terminal device; or a combination of the two, 30. The base station apparatus according to claim 29.

Claims

1. A terminal device (10), A control unit (110); a receiving unit (122) that receives, from a base station device (20), a radio resource control (RRC) message including a discontinuous reception (DRX) setting that includes information for setting a value of an on-duration timer for a DRX group; The control unit configured to monitor a Physical Downlink Control Channel (PDCCH) during an active time that includes a time during which the on-duration timer for the DRX group is running; the on-duration timer is started using a first formula based on the DRX cycle when information for setting a non-integer value length of the DRX cycle included in the DRX configuration is received from the base station device; the on-duration timer is started using a second formula based on the DRX cycle when information for setting a non-integer value length of the DRX cycle included in the DRX configuration is not received from the base station device; The first equation is: System Frame Number (SFN), and a second value calculated based on the first value that increases when the SFN is updated to zero; including the addition operation of Terminal device.

2. The second formula does not include the second value calculated based on the first value. The terminal device according to claim 1 .

3. The second value is calculated based on a multiplication operation of the first value and a predetermined integer value. The terminal device according to claim 1 or 2.

4. A method for a terminal device (10), comprising: receiving a radio resource control (RRC) message from a base station device (20) including a discontinuous reception (DRX) setting, the DRX setting including information for setting an on-duration timer value for a DRX group; monitoring a Physical Downlink Control Channel (PDCCH) during an active time that includes a time during which the on-duration timer for the DRX group is running; Including, the on-duration timer is started using a first formula based on the DRX cycle when information for setting a non-integer value length of the DRX cycle included in the DRX configuration is received from the base station device; the on-duration timer is started using a second formula based on the DRX cycle when information for setting a non-integer value length of the DRX cycle included in the DRX configuration is not received from the base station device; The first equation is: System Frame Number (SFN), and a second value calculated based on the first value that increases when the SFN is updated to zero; including the addition operation of method.

5. The second formula does not include the second value calculated based on the first value. The method of claim 4.

6. The second value is calculated based on a multiplication operation of the first value and a predetermined integer value.

6. The method according to claim 4 or 5.

7. A base station device (20), A control unit (210); a transmitter (221) configured to transmit a radio resource control (RRC) message including a discontinuous reception (DRX) setting, the radio resource control (RRC) message including information for setting an on-duration timer value for a DRX group, to a communication device (10); the controller is configured to control a DRX operation for monitoring a Physical Downlink Control Channel (PDCCH) during an active time including a time during which the on-duration timer for the DRX group is operating; the on-duration timer is started using a first formula based on the DRX cycle when information for setting a non-integer value of a DRX cycle length included in the DRX configuration is transmitted to the communication device; the on-duration timer is started using a second formula based on the DRX cycle when information for setting a non-integer length of the DRX cycle included in the DRX configuration is not transmitted to the communication device; and The first equation is: System Frame Number (SFN), and a second value calculated based on the first value that increases when the SFN is updated to zero; including the addition operation of Base station equipment.

8. The second formula does not include the second value calculated based on the first value. The base station device according to claim 7.

9. The second value is calculated based on a multiplication operation of the first value and a predetermined integer value. The base station device according to claim 7 or 8.

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