Terminal device and method of terminal device

Abstract

A terminal device (10) is provided with: a control unit (110); and a communication unit (120) configured to perform wireless communication by being controlled by the control unit (110). The control unit (110) is configured to start an ON period of discontinuous reception (DRX) using a formula including a correction value for a system frame number (SFN), and to start the ON period of the discontinuous reception (DRX) using a formula including a correction value for the SFN.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of priority based on Japanese application No. 2022-099928, filed on June 21, 2022, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a terminal device and a method of the terminal device. Background Art

[0004] In recent years, the development of technologies related to extended reality (eXtended Reality, XR) is progressing. XR is a concept that includes multimedia integrated technologies such as virtual reality (VR), augmented reality (AR), mixed reality (MR), and substitute reality (SR). In XR, three-dimensional time-series image data in real space and / or virtual space, multi-channel (stereo, 5.1ch, etc.) voice data, other data presented to the user, control data, etc. are sent and received in parallel. XR requires low latency and high reliability to maintain and improve the user's quality of experience.

[0005] In non-patent document 1, research is underway to realize XR in 5G NR (Fifth Generation New Radio), which is a radio specification defined by the Third Generation Partnership Project (3GPP (registered trademark)).

[0006] Prior art literature

[0007] Non-patent literature

[0008] Non-patent document 1: 3GPP TR 38.838 V17.0.0 (2021-12)

[0009] Non-patent document 2: 3GPP TS 38.321 V17.0.0 (2022-03)

[0010] Non-patent document 3: 3GPP TS 38.213 V17.0.0 (2021-12) Summary of the invention

[0011] In the aforementioned XR implementation research, power consumption in terminal devices is listed as a research item. For example, discontinuous reception (DRX) is used as a technology to reduce power consumption of terminal devices.

[0012] A terminal device configured with DRX monitors the signal from the base station device in a configured cycle. Specifically, the terminal device monitors the signal from the base station device only during the on-duration in the aforementioned cycle. In such a configuration, the inventors conducted a detailed study and found the following problem: due to the configuration of the time length of the DRX cycle, the time length of the DRX cycle is not maintained fixed, and the timing of the signal reaching the terminal device from the base station device is inconsistent with the start timing of the aforementioned on-duration. As a result, the terminal device cannot receive the signal from the base station device. In addition, the inventors found that this problem may also occur in terminal devices other than the terminal devices corresponding to XR.

[0013] The present disclosure provides a technology capable of appropriately controlling a DRX cycle.

[0014] A terminal device according to one aspect of the present disclosure includes: a control unit; and a communication unit, configured to perform wireless communication by being controlled by the aforementioned control unit, and the aforementioned control unit is configured to: start a discontinuous reception (DRX) cycle using a formula including a correction value for a system frame number (SFN).

[0015] Furthermore, a method of a terminal device in one aspect of the present disclosure includes: determining whether a formula holds true, the formula including a correction value for SFN; and starting a discontinuous reception (DRX) on period if the formula holds true.

[0016] Effects of the Invention

[0017] According to the above configuration, by introducing a correction value to SFN, the cycle of DRX can be appropriately controlled. In addition, by the above configuration, other effects can be achieved instead of or together with this effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above-mentioned objects and other objects, features and advantages of the present disclosure will become more apparent through the following detailed description with reference to the accompanying drawings. In the accompanying drawings:

[0019] Figure 1 is a diagram showing a communication system S according to the first embodiment;

[0020] Figure 2is a diagram showing a protocol stack of the U plane according to the first embodiment;

[0021] Figure 3 is a diagram showing a protocol stack of the C-plane involved in the first embodiment;

[0022] Figure 4 is a block diagram showing a schematic hardware configuration of a terminal device 10 according to the first embodiment;

[0023] Figure 5 1 is a block diagram showing a schematic functional structure of a terminal device 10 according to an embodiment;

[0024] Figure 6 is a block diagram showing a schematic hardware configuration of a base station device 20 according to the first embodiment;

[0025] Figure 7 1 is a block diagram showing a schematic functional structure of a base station device 20 according to an embodiment;

[0026] Figure 8 is a diagram showing a radio frame configuration according to the first embodiment;

[0027] Fig. 9 is a diagram showing three radio resource control (RRC) states that the terminal device 10 according to the first embodiment can take;

[0028] Fig.10 is a schematic diagram for explaining discontinuous reception (DRX) in the first embodiment;

[0029] Fig.11 is a diagram showing the relationship between the timing of signal arrival at a terminal device and the start timing of a DRX on period;

[0030] Fig.12 is a sequence diagram showing the flow of DRX processing in the first embodiment;

[0031] Fig.13 is a diagram showing the relationship between the timing at which a signal reaches the terminal device 10 and the start timing of the DRX on period in a case where the configuration in the first embodiment is applied;

[0032] Fig.14 is a flowchart showing the flow of processing of formula selection in the first aspect of long DRX;

[0033] Fig.15 is a flowchart showing the flow of processing of formula selection in the second aspect of Long DRX;

[0034] Fig.16 is a flowchart showing the flow of processing of formula selection in the third aspect of Long DRX;

[0035] Fig.17 is a flowchart showing the flow of a process for formula selection in the first aspect of short DRX;

[0036] Fig.18 is a flowchart showing the flow of processing of formula selection in the second aspect of short DRX;

[0037] Fig.19 is a flowchart showing the flow of processing of formula selection in the third aspect of short DRX;

[0038] Fig. 20 is a sequence diagram showing the flow of SPS (Semi-Persistent Scheduling) processing in the second embodiment;

[0039] Fig.21 is a flowchart showing the flow of processing of formula selection in the first aspect of SPS;

[0040] Fig. 22 is a flowchart showing the flow of processing of formula selection in the first aspect of SPS;

[0041] Fig.23 is a flowchart showing the flow of processing of formula selection in the second aspect of SPS;

[0042] Fig.24 is a flowchart showing the flow of processing of formula selection in the second aspect of SPS;

[0043] Fig.25 is a flowchart showing the flow of processing of formula selection in the third aspect of SPS;

[0044] Fig.26 is a flowchart showing the flow of processing of formula selection in the third aspect of SPS;

[0045] Fig. 27 is a sequence diagram showing the flow of processing of a scheduling request (SR) in the second embodiment;

[0046] Fig.28 is a flowchart showing the flow of processing of formula selection in the first aspect of SR;

[0047] Fig.29 is a flowchart showing the flow of processing of formula selection in the first aspect of SR;

[0048] Fig.30 is a flowchart showing the flow of processing of formula selection in the second aspect of SR;

[0049] Fig.31 is a flowchart showing the flow of processing of formula selection in the second aspect of SR;

[0050] Fig.32 is a flowchart showing the flow of processing of formula selection in the third aspect of SR;

[0051] Fig.33 is a flowchart showing the flow of processing of formula selection in the third aspect of SR;

[0052] Fig.34 This is a sequence diagram showing the flow of processing of type 1 of CG (Configured Grant) in the second embodiment;

[0053] Fig.35 is a flowchart showing the flow of processing of formula selection in the first aspect of Type 1 of CG;

[0054] Fig.36 is a flowchart showing the flow of processing of formula selection in the first aspect of Type 1 of CG;

[0055] Fig.37 is a flowchart showing the flow of processing of formula selection in the second aspect of Type 1 of CG;

[0056] Fig.38 is a flowchart showing the flow of processing of formula selection in the second aspect of Type 1 of CG;

[0057] Fig.39 is a flowchart showing the flow of processing of formula selection in the third aspect of Type 1 of CG;

[0058] Fig.40 is a flowchart showing the flow of processing of formula selection in the third aspect of Type 1 of CG;

[0059] Fig.41 is a sequence diagram showing the flow of processing of type 2 of CG in the second embodiment;

[0060] Fig.42 is a flowchart showing the flow of processing of formula selection in the first aspect of type 2 of CG;

[0061] Fig.43 is a flowchart showing the flow of processing of formula selection in the first aspect of type 2 of CG;

[0062] Fig.44 is a flowchart showing the flow of processing of formula selection in the second aspect of Type 2 of CG;

[0063] Fig.45is a flowchart showing the flow of processing of formula selection in the second aspect of Type 2 of CG;

[0064] Fig.46 is a flowchart showing the flow of processing of formula selection in the third aspect of Type 2 of CG;

[0065] Fig.47 It is a flowchart showing the flow of processing of formula selection in the third aspect of Type 2 of CG. DETAILED DESCRIPTION

[0066] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, in the present specification and the accompanying drawings, elements that can be described in the same manner are given the same reference numerals, and repeated descriptions may be omitted.

[0067] Each embodiment described below is only an example of a configuration that can implement the present disclosure. The following embodiments can be appropriately modified or changed according to the configuration of the device to which the present disclosure is applied and various conditions. All combinations of elements included in the following embodiments are not necessary for implementing the present disclosure, and a part of the elements can be appropriately omitted. Therefore, the scope of the present disclosure is not limited to the configurations described in the following embodiments. As long as there is no contradiction, a configuration combining multiple configurations described in the following embodiments can also be adopted.

[0068] 1. First Implementation

[0069] 1.1. Communication system

[0070] like Figure 1 As shown, the communication system S of the first embodiment includes one or more terminal apparatuses 10, one or more base station apparatuses 20, and a core network 30. The communication system S is configured according to predetermined technical specifications (TS). For example, the communication system S may follow the technical specifications (e.g., 5G, 5G advanced, 6G, etc.) specified by the Third Generation Partnership Project (3GPP).

[0071] In the communication system S, a user plane (User Plane) for sending and receiving user data and a control plane (Control Plane) for sending and receiving control data are specifically configured. That is, the communication system S supports C / U separation. The user plane is referred to as the U plane, and the control plane is referred to as the C plane.

[0072] The base station device 20 manages at least one cell. A cell constitutes the smallest unit of a communication area. For example, a cell belongs to a frequency (for example, a carrier frequency) and includes a component carrier. The term "cell" sometimes refers to a wireless communication resource and sometimes refers to a communication object of the terminal device 10. The base station device 20 wirelessly communicates with the terminal device 10 located in the cell in the U plane and the C plane. In other words, the base station device 20 terminates the U plane protocol and the C plane protocol for the terminal device 10.

[0073] The base station device 20 communicates with the core network 30 in the U plane and the C plane. In more detail, the core network 30 includes a plurality of logical nodes, and the aforementioned plurality of logical nodes include an access and mobility management function (Access and Mobility Management Function, AMF) and a user plane function (User Plane Function, UPF). The base station device 20 is connected to the AMF in the C plane and to the UPF in the U plane.

[0074] The base station device 20 may be, for example, a gNB that provides the terminal device 10 with a U-plane and a C-plane that comply with the 3GPP 5G NR (New Radio) specification and is connected to the 3GPP 5GC (5G Core Network). In addition, the base station device 20 may also be a device that complies with other earlier or newer 3GPP specifications.

[0075] The base station device 20 may include a plurality of unit devices. For example, the base station device 20 may include a central unit (CU), a distributed unit (DU), and a radio unit (RU).

[0076] A radio access network (RAN) is formed by interconnecting multiple base station devices 20. The radio access network formed by the base station device 20 as a gNB can also be called NG-RAN (next generation radio access network). The base station device 20 as a gNB can also be called an NG-RAN node.

[0077] The multiple base station devices 20 are connected to each other through a predetermined interface (e.g., an Xn interface). More specifically, for example, the multiple base station devices 20 are connected to each other through an Xn-U interface in the U plane and are connected to each other through an Xn-C interface in the C plane. In addition, the multiple base station devices 20 may also be connected to each other through other interfaces with different functions or names.

[0078] Each base station device 20 is connected to the core network 30 through a predetermined interface (e.g., NG interface). In more detail, for example, each base station device 20 is connected to the UPF of the core network 30 through the NG-U interface in the U plane, and is connected to the AMF of the core network 30 through the NG-C interface in the C plane. In addition, each base station device 20 may also be connected to the core network 30 through other interfaces with different functions or names.

[0079] The terminal device 10 may be a device that wirelessly communicates with the base station device 20 as described above, such as a user equipment (UE) that operates in accordance with the 5G NR specification of 3GPP. In addition, the terminal device 10 may also be a device that complies with other earlier or newer 3GPP specifications.

[0080] The terminal device 10 can be, for example, a mobile phone terminal such as a smartphone, a tablet terminal, a notebook PC (personal computer), a communication module, a communication card, or an IoT (Internet of Things) device such as a surveillance camera and a robot. The terminal device 10 can also be a vehicle (for example, a car, a train, etc.) or a device arranged thereon. The terminal device 10 can also be a transport body other than a vehicle (for example, a ship, an airplane, etc.) or a device arranged thereon. The terminal device 10 can also be a sensor or a device arranged thereon. In addition, the terminal device 10 can also be referred to 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, a remote unit, and other names. The terminal device 10 can also 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).

[0081] Reference Figure 2 , the wireless protocol architecture between the terminal device 10 and the base station device 20 is described. Figure 3 , the wireless protocol architecture between the terminal device 10 and the base station device 20 and between the terminal device 10 and the core network 30 is explained.

[0082] like Figure 2As shown, in the protocol stack of the U plane, a physical (Physical, PHY) layer, a media access control (Media Access Control, MAC) layer, a radio link control (Radio Link Control, RLC) layer, a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer, and a service data adaptation protocol (Service Data Adaptation Protocol, SDAP) layer are sequentially arranged from the lowest layer. The aforementioned layers are terminated at the base station device 20 on the network side.

[0083] like Figure 3 As shown, in the protocol stack of the C plane, the physical (Physical, PHY) layer, the media access control (Media Access Control, MAC) layer, the radio link control (Radio Link Control, RLC) layer, the packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer, the radio resource control (Radio Resource Control, RRC) layer, and the non-access stratum (Non-Access Stratum, NAS) are arranged in order from the lowest layer. The aforementioned layers except the non-access stratum are 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.

[0084] like Figure 4 As shown, the terminal device 10 includes a processor 101, a memory 102, an input / output interface 103, a wireless interface 104, and an antenna 105 as hardware elements. The above elements provided in the terminal device 10 are connected to each other via an internal bus. In addition, the terminal device 10 may also include Figure 4 Hardware elements other than those shown.

[0085] 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) including elements such as a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), and a memory controller.

[0086] The memory 102 includes at least one storage medium such as RAM (Random Access Memory), eMMC (embedded Multi Media Card), etc. The memory 102 is an element that temporarily or permanently stores programs and data for executing various processes in the terminal device 10. The aforementioned program includes one or more commands for the operation of the terminal device 10. The processor 101 implements the functions of the terminal device 10 by decompressing the program stored in the memory 102 into the memory 102 and / or the system memory (not shown) and executing it.

[0087] The input / output interface 103 is an interface that receives an operation for the terminal device 10 and provides it to the processor 101 , and presents various information to the user, and is, for example, a touch panel.

[0088] The wireless interface 104 is a circuit that performs various signal processing for realizing wireless communication, and includes a baseband processor and an RF circuit. The wireless interface 104 transmits and receives radio signals with the base station device 20 via the antenna 105 .

[0089] like Figure 5 As shown, the terminal device 10 includes a control unit 110 and a communication unit 120 as functional blocks. The communication unit 120 includes at least one transmitting unit 121 and at least one receiving unit 122.

[0090] 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 implemented by the processor 101 and the memory 102. The control unit 110 performs 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.

[0091] The communication unit 120 includes a wireless interface 104 and an antenna 105. In other words, the communication unit 120 is implemented by the wireless interface 104 and the antenna 105. The communication unit 120 wirelessly communicates with the base station device 20 by transmitting and receiving radio signals with the base station device 20. The communication unit 120 may include a plurality of wireless interfaces 104 and antennas 105.

[0092] Various processes of the terminal device 10 of this embodiment are executed by the operation of the control unit 110 .

[0093] like Figure 6 As shown, the base station device 20 includes a processor 201, a memory 202, a network interface 203, a wireless interface 204 and an antenna 205 as hardware elements. The above elements arranged in the base station device 20 are connected to each other via an internal bus. In addition, the base station device 20 may also include Figure 6Hardware elements other than those shown.

[0094] The processor 201 is a computing element that implements various functions of the base station device 20. The processor 201 may be a CPU, or may include other processors such as a GPU.

[0095] The memory 202 includes at least one storage medium of ROM (Read Only Memory), RAM, HDD (Hard Disk Drive), SSD (Solid State Drive), etc. The memory 202 is an element that temporarily or permanently stores programs and data for executing various processes in the base station device 20. The aforementioned program includes one or more commands for the operation of the base station device 20. The processor 201 implements the functions of the base station device 20 by decompressing the program stored in the memory 202 into the memory 202 and / or the system memory (not shown) and executing it.

[0096] The network interface 203 is an interface for transmitting and receiving signals with other base station devices 20 and the core network 30 .

[0097] The wireless interface 204 is a circuit that performs various signal processing for realizing wireless communication, and includes a baseband processor and an RF circuit. The wireless interface 204 transmits and receives radio signals with the base station device 20 via the antenna 205 .

[0098] like Figure 7 As shown, the base station device 20 includes a control unit 210 , a communication unit 220 and a network communication unit 230 as functional blocks. The communication unit 220 includes at least one transmission unit 221 and at least one reception unit 222 .

[0099] 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 implemented by the processor 201 and the memory 202. The control unit 210 performs various control processes in the base station device 20. For example, the control unit 210 controls wireless communication with the base station device 10 via the communication unit 220. In addition, 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.

[0100] The communication unit 220 includes a wireless interface 204 and an antenna 205. In other words, the communication unit 220 is implemented by the wireless interface 204 and the antenna 205. The communication unit 220 wirelessly communicates with the terminal device 10 by transmitting and receiving radio signals with the terminal device 10. The communication unit 220 may include a plurality of wireless interfaces 204 and antennas 205.

[0101] The network communication unit 230 includes a network interface 203. In other words, the network communication unit 230 is implemented by the network interface 203. The network interface 203 transmits and receives signals with the network (and further, the aforementioned other nodes).

[0102] Various processes of the base station apparatus 20 according to this embodiment are executed by the operation of the control unit 210 .

[0103] 1.2. Radio resources

[0104] The terminal device 10 and the base station device 20 communicate with each other wirelessly using radio resources in the frequency domain and the time domain. The radio resources will be described below.

[0105] The transmission method of the 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 (Cyclic Prefix Orthogonal Frequency Division Multiplexing). The transmission method of the uplink communication from the terminal device 10 to the base station device 20 is, for example, the aforementioned CP-OFDM, or DFTS-OFDM (Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing) that applies CP-OFDM after performing transform precoding (Discrete Fourier Transform (DFT) spreading).

[0106] The cyclic prefix is ​​a redundant signal that functions as a guard period to prevent inter-symbol interference and inter-carrier interference, and is inserted at the beginning of an OFDM symbol. There are a normal cyclic prefix and an extended cyclic prefix as types of cyclic prefixes.

[0107] Multiple subcarriers that are orthogonal to each other are used as frequency domain radio resources of OFDM. Multiple subcarriers are arranged in the frequency domain with a predetermined subcarrier spacing (SCS) Δf. In the communication system S, multiple subcarrier spacings Δf can be applied. The subcarrier spacing Δf is represented by the following equation, for example.

[0108] Δf=2 μ 15[kHz]

[0109] Here, μ is an integer greater than or equal to 0, and can take at least any of the values ​​of 0, 1, 2, 3, 4, 5, and 6. Therefore, the subcarrier spacing Δf [kHz] can take at least any of the values ​​of 15, 30, 60, 120, 240, 480, and 960. In addition, μ can also take a value greater than or equal to 7.

[0110] In the time domain of OFDM, Figure 8 As shown, a hierarchical radio frame configuration is used. A radio frame includes 10 subframes. Subframes are assigned subframe numbers that count up by 1 from 0 to 9. A radio frame is divided into two half flames. The time length of a radio frame is 10ms, the time length of a half flame is 5ms, and the time length of a subframe is 1ms. The above time lengths do not depend on the subcarrier spacing Δf.

[0111] One subframe includes one or more time slots (s). The number of time slots Ns included in one subframe depends on the value of μ and further depends on the subcarrier spacing Δf. The number of time slots Ns is expressed by the following equation, for example.

[0112] Ns=2 μ

[0113] A time slot includes multiple symbols. The number of symbols included in a time slot depends on the type of the cyclic prefix. For example, when a normal cyclic prefix is ​​used, a time slot includes 14 symbols. For example, when an extended cyclic prefix is ​​used, a time slot includes 12 symbols.

[0114] As described above, the number of slots and the number of symbols included in each of a radio frame, a half frame, and a subframe having a fixed time length are variable. Therefore, the time length of a slot and the time length of a symbol are also variable.

[0115] A resource element (RE) is a time-frequency domain radio resource unit including one subcarrier and one symbol, and a resource block (RB) is a time-frequency domain radio resource unit including 12 subcarriers and multiple symbols.

[0116] Radio frames are assigned system frame numbers (SFNs) that count upward from 0 to 1023. SFN "0" is equivalent to the initial value of SFN, and SFN "1023" is equivalent to the maximum value of SFN. Therefore, the next radio frame after the radio frame assigned SFN 1023 is assigned SFN 0. 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).

[0117] Furthermore, a Hyper-System Frame Number (H-SFN) may also be used. The Hyper-System Frame Number is a number that is counted up 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, when the System Frame Number wraps around, the Hyper-System Frame Number may be increased by 1 (incremented).

[0118] Here, the base station apparatus 20 may send system information including information indicating the H-SFN to the terminal apparatus 10. For example, the base station apparatus 20 may send a system information block 1 (SIB1) including information indicating the H-SFN to the terminal apparatus 10. Here, the system information block 1 is also referred to as a system information block type 1. In addition, the base station apparatus 20 may also send information indicating that extended DRX (eDRX) is allowed in a cell (serving cell) to the terminal apparatus 10. For example, the base station apparatus 20 may indicate that extended DRX is allowed in a cell (operation in extended DRX) by sending information indicating that extended DRX is allowed in a cell (i.e., by the information being present in a field). In addition, the base station apparatus 20 may indicate that extended DRX is not allowed in a cell (operation in extended DRX) by not sending information indicating that extended DRX is allowed in a cell (i.e., by the information not being present in a field). For example, the base station apparatus 20 may send system information (e.g., SIB1) including information indicating that extended DRX is allowed in a cell to the terminal apparatus 10. That is, the base station apparatus 20 may transmit system information (for example, SIB1) to the terminal apparatus 10 , the system information including information indicating the H-SFN and / or information indicating that extended DRX is allowed in the cell.

[0119] The terminal device 10 can determine the H-SFN based on the information indicating the H-SFN. In addition, the terminal device 10 can determine whether to use the H-SFN based on the information indicating the H-SFN. In addition, the terminal device 10 can determine whether to use the H-SFN based on the information indicating that extended DRX is allowed in the cell. That is, the terminal device 10 can determine whether to use the H-SFN based on the information indicating the H-SFN and / or the information indicating that extended DRX is allowed in the cell. In addition, the terminal device 10 can determine whether to perform extended DRX based on the information indicating that extended DRX is allowed in the cell. In this embodiment, DRX may include extended DRX. That is, the DRX in this embodiment can be replaced by extended DRX.

[0120] 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 a downlink and / or a component carrier in an uplink. The technology of configuring one or more serving cells and performing wireless communication between the base station device 20 and the terminal device 10 may also be referred to as carrier aggregation.

[0121] In addition, the base station device 20 may configure one or more bandwidth parts (Bandwidth Part, BWP) for the terminal device 10 for each of one or more service cells. For example, a downlink bandwidth part (DownLink Bandwidth Part, DL-BWP) may be configured in the downlink of a service cell. In addition, an uplink bandwidth part (UpLink Bandwidth Part, UL-BWP) may be configured in the uplink of a service cell. Here, DL-BWP may include an initial DL-BWP and / or a dedicated DL-BWP. In addition, UL-BWP may include an initial UL-BWP and / or a dedicated UL-BWP. In the following, BWP may include DL-BWP and / or UL-BWP.

[0122] 1.3. Channel and control information

[0123] 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 downlink and uplink are exemplified below.

[0124] The terminal device 10 and the base station device 20 use a plurality of hierarchical channels to transmit and receive user data and control information. The physical channel is a channel used for physical communication between the terminal device 10 and the base station device 20. As the physical channel, a physical downlink control channel (PDCCH), a physical broadcast channel (PBCH), and a physical uplink control channel (PUCCH) are exemplified.

[0125] The transport channel is a channel located at the upper level of the physical channel and is mapped to the physical channel in the PHY layer. Multiple transport channels can be mapped to one physical channel. As transport channels, a downlink shared channel (DL-SCH) and an uplink shared channel (UL-SCH) are exemplified. For example, data in the downlink may also be referred to as DL-SCH data. In addition, for example, data in the uplink may also be referred to as UL-SCH data. Here, DL-SCH data includes user data in the downlink. In addition, UL-SCH data includes user data in the uplink.

[0126] 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 can be mapped to one transport channel, and one logical channel can be mapped to multiple transport channels. Logical channels are classified according to the characteristics of the information transmitted. As logical channels, a broadcast control channel (BCCH), a common control channel (CCCH), and a dedicated control channel (DCCH) are exemplified.

[0127] The base station apparatus 20 uses the PDCCH, which is a physical channel, to transmit downlink control information (DCI) to the terminal apparatus 10. The DCI includes information on downlink and uplink resource allocation for the terminal apparatus 10 and control information of other terminal apparatuses 10. The DCI is mapped to the PDCCH and corresponds to layer 1 signaling.

[0128] Here, for the transmission of DCI in PDCCH, one or more formats may be specified. The format specified for the transmission of DCI in PDCCH may be referred to as DCI format. For example, the DCI format may include a DCI format for scheduling of 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). In addition, for example, the DCI format may include a DCI format for scheduling of 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). In addition, the DCI format may include a DCI format not used for scheduling of PDSCH and / or PUSCH. The DCI format for scheduling of PDSCH and / or PUSCH may be referred to as a scheduling DCI format. The DCI format not used for scheduling of PDSCH and / or PUSCH may be referred to as a non-scheduled DCI format. In this embodiment, for convenience of explanation, “DCI format” may be simply expressed as “PDCCH”. Also, “DCI generated according to the DCI format” may be simply expressed as “DCI format”.

[0129] For example, the base station device 20 may configure the terminal device 10 to monitor (i.e., monitor) the frequency domain resources and / or time domain resources of the PDCCH candidate set. For example, the frequency domain resources of the PDCCH candidate set monitored by the terminal device 10 may be referred to as a control resource set (COntrol REsource SET, CORESET). In addition, the time domain resources of the PDCCH candidate set monitored by the terminal device 10 may be referred to as a search space set (Search Space Set, SSS). The terminal device 10 may monitor the PDCCH candidate set in one or more CORESETs in the DL-BWP of the service cell configured with PDCCH monitoring according to the corresponding search space set. Here, monitoring may mean attempting to decode each of the PDCCH candidates according to the monitored DCI format. The above configuration may be referred to as blind decoding.

[0130] Here, a CRC (Cyclic Redundancy Check) scrambled with an RNTI (Radio Network Temporary Identifier) ​​may be added to the DCI (or DCI format) sent on the PDCCH. The CRC may also be referred to as a CRC parity bit. There are multiple types of RNTIs specified. For example, the base station device 20 may configure each RNTI by sending an RRC message, wherein the RRC message includes at least one of information indicating a C-RNTI (Cell-RNTI: Cell Radio Network Temporary Identifier), information indicating an MCS-C-RNTI (Modulation and Coding Scheme Cell-RNTI: Modulation and Coding Scheme Cell Radio Network Temporary Identifier), and information indicating a CS-RNTI (Configured Scheduling-RNTI: Configured Scheduling Radio Network Temporary Identifier). That is, a CRC scrambled with at least one of a C-RNTI, an MCS-C-RNTI, and a CS-RNTI may be added to the DCI (or DCI format) sent on the PDCCH.

[0131] That is, the terminal device 10 may monitor (and / or receive) the PDCCH and detect (and / or receive) the DCI format. Here, as described later, the terminal device 10 may monitor (and / or receive) the PDCCH during an active time in the DRX operation.

[0132] The terminal device 10 uses the PUCCH as a physical channel to send uplink control information (UCI) to the base station device 20. UCI includes control information such as Scheduling Request (SR), Ack / Nack of Hybrid Automatic Repeat reQuest (HARQ), and Channel State Information (CSI). UCI is mapped to PUCCH or PUSCH, which is equivalent to layer 1 signaling.

[0133] The base station device 20 uses the DL-SCH as a transmission channel to send a MAC layer control element (CE) to the terminal device 10. The downlink MAC CE includes control information such as a DRX (described later) command. The downlink MAC CE is mapped to the PDSCH via the DL-SCH, which is equivalent to layer 2 signaling.

[0134] The terminal device 10 uses the UL-SCH as a transmission channel to send a MAC layer control element (CE) to the base station device 20. The uplink MAC CE includes control information such as a buffer status report (BSR). The uplink MAC CE is mapped to the PUSCH via the UL-SCH, which is equivalent to layer 2 signaling.

[0135] The base station device 20 uses BCCH as a logical channel to send (or notify) system information (SI) to the terminal device 10. SI includes minimum system information (MSI) and other system information (OSI). MSI includes a master information block (MIB) and system information block 1 (SIB 1). SIB1 can be called remaining minimum system information (RMSI). OSI includes system information blocks (SIB 2~) other than SIB1. In BCCH, MIB is mapped to PBCH via BCH (Broadcast CHannel), and SIB is mapped to PDSCH via DL-SCH.

[0136] The base station device 20 uses a signaling radio bearer (SRB) established between the terminal device 10 and the base station device 20 in the RRC layer to send control information in the RRC layer to the terminal device 10. Hereinafter, the 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 categories of SRBs (e.g., SRB 0, SRB 1, SRB 2, SRB 3, SRB 4). In addition to RRC messages, SRBs are also used for sending and receiving NAS messages including control information in the NAS layer. CCCH or DCCH is used to send RRC messages from the base station device 20 to the terminal device 10. CCCH and DCCH are mapped to PDSCH via DL-SCH, respectively. RRC messages are equivalent to layer 3 signaling.

[0137] As an example of a downlink RRC message, an RRC reconfiguration message is described. The RRC reconfiguration message is an RRC message sent from the base station device 20 to the terminal device 10 using SRB 1 or SRB 3. The DCCH is used to send the RRC reconfiguration message. The RRC reconfiguration message is used to perform reconfiguration or modification related to the connection between the base station device 20 and the terminal device 10.

[0138] The terminal device 10 uses the aforementioned SRB to transmit an RRC message to the base station device 20. The CCCH or DCCH is used to transmit an RRC message from the terminal device 10 to the base station device 20. The CCCH and DCCH are mapped to the PUSCH via the UL-SCH, respectively. The RRC message corresponds to layer 3 signaling.

[0139] As an example of an uplink RRC message, a user equipment capability information (UECapabilityInformation) message is described. The user equipment capability information message is an RRC message sent from the terminal device 10 to the base station device 20 using SRB 1. The DCCH is used to send 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 (radio accesscapability) of the terminal device 10.

[0140] As an example of an uplink RRC message, a user equipment assistance information (UEAssistanceInformation) message is described. The user equipment assistance information message is an RRC message sent from the terminal device 10 to the base station device 20 using SRB 1 or SRB 3. DCCH is used to send 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).

[0141] 1.4. Radio Resource Control (RRC) Status

[0142] like Fig. 9 As shown, the terminal device 10 takes any one of three radio resource control (RRC) states: RRC connected (RRC_CONNECTED), RRC inactive (RRC_INACTIVE), and RRC idle (RRC_IDLE).

[0143] 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 with 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 and receive radio signals with 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.

[0144] 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.

[0145] 1.5. Scheduling

[0146] 1.5.1. Downlink Scheduling

[0147] As described above, the base station apparatus 20 transmits DCI to the terminal apparatus 10 using the PDCCH. The DCI includes information on resource allocation of the PDSCH. The terminal apparatus 10 receives a signal from the base station apparatus 20 using resources allocated with the PDSCH. In this way, the base station apparatus 20 can dynamically perform downlink scheduling using the DCI.

[0148] Unlike the aforementioned dynamic scheduling, SPS (Semi-Persistent Scheduling) is a scheduling method that allocates radio resources semi-persistently. The base station device 20 sends an RRC message including the parameters of SPS to the terminal device 10. The parameters of SPS are included in the SPS-Config IE, which is an example of an information element (IE) of RRC. The SPS-Config IE includes a parameter periodicity, which is related to the periodicity of transmission using PDSCH (i.e., the periodicity of resource allocation for the downlink configured for SPS). In addition, the parameter periodicity is configured in milliseconds. Alternatively, the parameter periodicity can also be configured in frames per second (Frame Per Second, FPS).

[0149] The base station apparatus 20 transmits DCI scrambled by using CS-RNTI (Configured Scheduling Radio Network Temporary Identifier) ​​to the terminal apparatus 10. CS-RNTI is used to activate periodic transmission using PDSCH. After transmitting DCI, the base station apparatus 20 transmits a signal using PDSCH at the configured period.

[0150] 1.5.2. Uplink Scheduling

[0151] (1) Scheduling Request (SR)

[0152] SR is used for the terminal device 10 to request the base station device 20 for radio resource allocation of PUSCH. SR can also be used to request UL-SCH resources for initial transmission. The base station device 20 allocates PUCCH resources for sending SR to the terminal device 10. The base station device 20 sends an RRC message including the parameters of SR to the terminal device 10. The parameters of SR are included in the SchedulingRequestResourceConfig (scheduling request resource configuration) IE, which is an example of an information element (IE) of RRC. SchedulingRequestResourceConfig includes parameters periodicityAndOffset related to the transmission period (SRperiodicity) and offset (SRoffset) of SR. In addition, the parameter SRperiodicity is configured in units of the number of time slots or the number of symbols. Alternatively, the parameter SRperiodicity can be configured in units of FPS.

[0153] The terminal device 10 uses the configured PUCCH resources to send UCI including SR to the base station device 20. The terminal device 10 can send UCI on demand. The terminal device 10 can also send UCI at a configured period. For example, the terminal device 10 can send SR set to "0" (negative SR) and / or SR set to "1" (positive SR).

[0154] (2) Configured Grant (CG)

[0155] CG is a scheduling method for allocating radio resources without a SR transmission process. CG includes two types, Type 1 and Type 2. The base station device 20 sends an RRC message including the parameters of CG to the terminal device 10. The parameters of CG are included in the ConfiguredGrantConfig IE, which is an example of an information element (IE) of RRC. The ConfiguredGrantConfig IE includes a parameter periodicity related to the period of transmission using PUSCH. In addition, the parameter periodicity is configured in units of the number of time slots or the number of symbols. Alternatively, the parameter periodicity can also be configured in units of FPS. In type 1, the terminal device 10 starts sending signals at a configured period without being triggered by DCI. On the other hand, in type 2, the terminal device 10 starts using PUSCH transmission at a configured period in response to the activation of DCI encrypted by using CS-RNTI.

[0156] 1.6. Discontinuous Reception (DRX)

[0157] Discontinuous Reception (DRX) is used as a technology to reduce power consumption of the terminal device 10. DRX can be applied to the terminal device 10 in the RRC idle state and the RRC connected state. DRX in the RRC connected state is called CDRX (Connected mode Discontinuous Reception).

[0158] like Fig.10 As schematically shown in , when DRX is configured (or set), the terminal device 10 may not monitor the PDCCH continuously, but may monitor 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. In addition, when the decoding of the PDCCH is successful, the terminal device 10 may continue to monitor the PDCCH and start a timer (inactivity timer). Here, repetition of the on-duration (e.g., periodic repetition) may be configured using a predetermined cycle (DRX cycle).

[0159] In DRX in the RRC idle state, the terminal device 10 monitors the PDCCH, for example, intermittently, and receives a paging message for invoking the terminal device 10. In CDRX, the terminal device 10 monitors the PDCCH, for example, intermittently, and receives resource allocation information (i.e., a DCI format for scheduling PDSCH and / or PUSCH). In DRX, the following configuration may also be adopted: first, a short DRX with a short cycle (Short DRX) is performed, and then a long DRX with a long cycle (Long DRX) is performed.

[0160] A part or all of the DRX parameters for configuring DRX in the terminal device 10 may be sent from the base station device 20 to the terminal device 10 using an RRC message. That is, the base station device 20 may send an RRC message including a part or all of the DRX parameters to the terminal device 10. Here, a part or all of the DRX parameters may be configured for a cell group including one or more service cells. That is, the base station device 20 may configure a cell group including one or more service cells, and configure a part or all of the DRX parameters for the configured cell group. For example, the base station device 20 may send an RRC message including information for configuring a cell group to the terminal device 10. Here, the cell group may be a cell group for configuring MAC parameters. In addition, the cell group may also be referred to as a primary cell group and / or a secondary cell group. In addition, the cell group may also be referred to as a DRX group.

[0161] The terminal device 10 receives an RRC message including a part or all of the DRX parameters, and controls the DRX operation based on a part or all of the DRX parameters. That is, the terminal device 10 can control the DRX operation by cell group based on a part or all of the DRX parameters. In particular, it can be that the DRX-Config IE as an example of an information element (IE) of the RRC includes a part or all of the DRX parameters, and the RRCReconfiguration as an RRC message including the DRX-Config IE is sent from the base station device 20 to the terminal device 10. A part or all of the DRX parameters may also be included in other IEs.

[0162] Here, part of the DRX parameters may be configured in common for the cell group, that is, part of the DRX parameters may be configured as parameters common to one or more cell groups, rather than being configured for each cell group.

[0163] In the following, examples are given of DRX parameters for configuring (or setting) DRX in the terminal device 10. In addition, the DRX parameters may be referred to as a DRX parameter set or information related to DRX. A DRX configuration configured (in other words, specified, determined, or identified) by a DRX parameter may be referred to as a DRX configuration. For example, a first DRX configuration may include at least one of an on-duration, a timer (inactivity timer), and / or a cycle (in other words, a DRX cycle).

[0164] - An on-duration timer (drx-onDurationTimer) indicating the time length of the on-duration of the terminal device 10. This DRX parameter is used to configure the value of the on-duration. For example, drx-onDurationTimer can be used to configure the duration at the start of the DRX cycle.

[0165] - An inactivity timer (drx-InactivityTimer) indicating the period during which the terminal device 10 maintains the on state from the reception of the PDCCH (i.e., the period until it becomes the off state). The DRX parameter may correspond to the value of the timer (inactivity timer). For example, the drx-InactivityTimer may be used to configure the period after receiving a PDCCH (i.e., a PDCCH occasion) indicating a new DL transmission and / or UL transmission.

[0166] - Cycle of On periods in Short DRX (eg, Short cycle) (drx-ShortCycle) This DRX parameter may correspond to a cycle in Short DRX (DRX cycle).

[0167] - A short cycle timer (drx-ShortCycleTimer) indicating a period of short DRX For example, the period of following the short DRX cycle can be configured for the terminal device 10 using drx-ShortCycleTimer.

[0168] - A start offset (drx-LongCycleStartOffset) indicating a cycle (e.g., a long cycle) and / or a start position (e.g., a subframe and / or a time slot) of an on period in long DRX. This DRX parameter may correspond to a cycle (DRX cycle) in long DRX. For example, drx-LongCycleStartOffset may be used to configure the position where a long DRX cycle and / or a short DRX cycle starts.

[0169] - A slot offset (drx-SlotOffset) indicating the delay until the start of the on-duration. For example, drx-SlotOffset can be used to configure the delay before the on-duration timer (drx-onDurationTimer) starts.

[0170] In this embodiment, "start of the on period" includes starting of drx-onDurationTimer. The aforementioned active time may include the time when drx-onDurationTimer or drx-InactivityTimer is running. Specifically, the active time for the serving cell in a specific cell group may include the time when drx-onDurationTimer or drx-InactivityTimer configured for the specific cell group is running.

[0171] In conventional DRX (including CDRX), the timing of the on period is determined by the system frame number (SFN) and the subframe number. As mentioned above, one cycle of the system frame number is 10240ms (=10.24 seconds). When the above cycle ends, the SFN returns to 0.

[0172] In order to introduce a longer time range to DRX, extended Discontinuous Reception (eDRX) can be applied. In eDRX, in addition to the system frame number (SFN) and the subframe number, the timing of the aforementioned on period is also determined using the aforementioned super system frame number. As mentioned above, one cycle of the super system frame number is 10485.76 seconds (=about 2.91 hours), so in eDRX, a longer time range can be used.

[0173] 1.7. eXtended Reality (XR)

[0174] The characteristics of the services occurring in XR are described. In XR, multiple types of data (video data, audio data, user data, control data, etc.) are sent and received in parallel. The multiple data streams corresponding to the aforementioned data each have different service characteristics and quality of service (QoS) requirements.

[0175] In the transmission and reception timing of the aforementioned data, time shifts manifested as jitter, variability, and fluctuation may occur due to video or audio encoding, network delay, and the like.

[0176] Video data is sent and received based on a frame rate, which is expressed in frames per second (FPS). For example, at 60 FPS, one frame of data is sent and received every 16.67 ms, and at 120 FPS, one frame of data is sent and received every 8.33 ms.

[0177] 1.8. Control of the start timing (start position) of the on period in DRX

[0178] 1.8.1. Configuration Overview

[0179] In order to determine the start of the On period in Long DRX, the following formula A1 may be used: The On period in Long DRX starts with the SFN and subframe number satisfying the formula A1.

[0180] [Number 1]

[0181] [(SFN×10)+subframe number]modulo(drx-LongCycle)

[0182] =drx-StartOffset…(A1)

[0183] It is assumed that the terminal device 10 starts the on period in the long DRX using the formula A1. For example, the parameters of the formula A1 are the following values.

[0184] drx-LongCycle=50ms

[0185] drx-StartOffset=0

[0186] As mentioned above, the duration of one SFN cycle is 10240 ms. If the duration of one SFN cycle is not an integer multiple of the duration of the long DRX cycle, Fig.11 Such a situation. 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, at the time point when SFN is updated from 1023 to 0, formula A1 holds true. Therefore, the terminal device 10 starts the on period in the long DRX from subframe number 0 of SFN0. Due to this operation, the time interval of the on period becomes shorter than 50 milliseconds. Since the time length of the long DRX cycle is not maintained fixed, a mismatch occurs between the timing of the arrival of signal 902 and the on period. This may cause a delay. Furthermore, in order to eliminate the aforementioned mismatch, the base station device 20 sometimes also reconfigures the parameters of the DRX. Along with this, the signaling between the base station device 20 and the terminal device 10 increases.

[0187] In addition, in order to determine the start of the on period in short DRX, the following formula B1 can be used. According to the formula B1, for short DRX, Fig.11 That kind of situation.

[0188] [Number 2]

[0189] [(SFN×10)+subframe number]modulo(drx-ShortCycle)

[0190] =(drx-StartOffset)modulo(drx-ShortCycle)…(B1)

[0191] Furthermore, the aforementioned problem may also occur in XR implementation. The arrival interval of video data in XR implementation is, for example, 16.67 milliseconds. In this case, the time length of the configured DRX cycle may be a time length that cannot be configured as an integer multiple of the time length of one cycle of SFN. Therefore, as described above, at the time point when SFN is updated from 1023 to 0, a mismatch occurs between the timing of the arrival of the signal from the base station device 20 and the on period.

[0192] In addition, in order to cope with the arrival interval of the aforementioned video data, a non-integer value may be introduced into the time length of the long DRX cycle in the future. In this case, at the time point when SFN is updated from 1023 to 0, a mismatch may also occur between the timing of the arrival of the signal from the base station device 20 and the on period. In addition, in the specification of this application, the expression "the time length is a non-integer value" means that it is not an integer in the unit serving as the benchmark of the time length. In the multiple embodiments described below, the description is based on the premise that the unit serving as the benchmark of the time length is milliseconds.

[0193] Next, the operations of the terminal device 10 and the base station device 20 according to this embodiment will be described. Fig.12 As shown, the control unit 210 of the base station device 20 sends an RRC message to the terminal device 10 via the communication unit 220 (S1001). The aforementioned RRC message is an RRC reconfiguration (RRCReconfiguration) message including the DRX-config IE. The control unit 110 of the terminal device 10 starts the DRX cycle based on the reception of the parameters included in the DRX-config IE (S1002).

[0194] In this embodiment, in the formulas A1 and B1 for determining the on period in DRX, a correction value may be applied to SFN. The control unit 110 starts the DRX cycle using the formula including the correction value for SFN.

[0195] The above formula includes the addition operation of SFN and the above correction value. In addition, the above correction value is a value that will not be zero even when SFN is updated from 1023 to 0. According to this configuration, when SFN is updated from 1023 to 0, the value of the above addition operation will not be zero. Thus, the time length of the DRX cycle is maintained fixed.

[0196] The correction value may be a value that increases as the number of times 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 SFN is updated from 1023 to 0 and a second value for offsetting SFN. For example, the correction value may be the product of the first value and the second value. According to this configuration, the SFN in the above formula is appropriately offset according to the number of times SFN is updated from 1023 to 0. Thus, the time length of the DRX cycle is maintained fixed. Below, the formula applied to each of long DRX and short DRX is described in more detail.

[0197] 1.8.2. Long DRX

[0198] (1) First aspect

[0199] 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 every time SFN becomes 0, and corresponds to the first value. sfnOffset_1 is a value for offsetting SFN, and corresponds to the second value.

[0200] [Number 3]

[0201] {[(SFN+sfnOffset_1×n)×10]+subframe number}modulo(drx-LongCycle))=drx-StartOffset

[0202] Where n=n+1 whenever SFN=0…(A2)

[0203] The control unit 110 determines whether the formula A2 is established. The control unit 110 starts the on period in the long DRX at the timing when the formula A2 is established. Specifically, the control unit 110 starts the on period timer (drx-onDurationTimer) at the timing delayed by the value indicated by drx-SlotOffset from the SFN and subframe number that satisfy the formula A2. That is, the control unit 110 starts the on period at the timing delayed by the value indicated by drx-SlotOffset from the SFN and subframe number that satisfy the formula A2.

[0204] According to the above structure, the following effects are achieved. For example, the parameters of formula A2 are the following values.

[0205] drx-LongCycle=50ms

[0206] drx-StartOffset=0

[0207] sfnOffset_1=4

[0208] like Fig.13 As shown, signals 1101 and 1102 arrive at the terminal device 10 from the base station device 20 at a time interval (period) of 50 ms. When SFN is 1 and the subframe number is 0, formula A2 holds true. At this timing, the control unit 110 starts the on period in the long DRX. Thus, the interval (period) of the on period is maintained at 50 ms. Therefore, after SFN is updated to 0, the timing of the arrival of signal 1102 is consistent with the timing of the on period. The terminal device 10 is able to receive signal 1102.

[0209] According to the above configuration, the possibility of mismatch between the timing of signal arrival from the base station apparatus 20 and the on period can be reduced. This can prevent the occurrence of delays as described above and increase in signaling due to reconfiguration of DRX parameters.

[0210] The base station device 20 sends 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 send an RRC message including the aforementioned first offset information to the terminal device 10. The aforementioned first offset information may be configured as a new element of the DRX-config IE. That is, the base station device 20 may send an RRC message including the aforementioned first offset information for a specific cell group to the terminal device 10. That is, the aforementioned first offset information may be configured for each of one or more cell groups (cell groups configured with DRX parameters). The aforementioned first offset information may also be an IE configuration other than the DRX-config IE. For example, the base station device 20 may send an RRC message to the terminal device 10, the RRC message including the aforementioned first offset information for a service cell belonging to a specific cell group. That is, the aforementioned first offset information may be configured for each of one or more service cells (each of the service cells belonging to a cell group configured with DRX parameters). The base station apparatus 20 may transmit system information (SI, such as SIB1 and / or SIBs other than SIB1) including the first offset information to the terminal apparatus 10. The base station apparatus 20 may transmit DCI including the first offset information to the terminal apparatus 10.

[0211] That is, the terminal device 10 can determine the active time for the service cell belonging to a specific cell group based on sfnOffset_1, and the sfnOffset_1 is configured for the specific cell group. That is, the terminal device 10 can start the activation period for the specific cell group based on the sfnOffset_1 for the specific cell group, and regard the time of the activation period action as the active time for the service cell belonging to the specific cell group. The terminal device 10 monitors the PDCCH during the active time. In addition, the terminal device 10 can determine the active time for the service cell belonging to a specific cell group (a cell group configured with DRX parameters) based on sfnOffset_1, and the sfnOffset_1 is configured for the service cell. That is, the terminal device 10 can start the activation period for the specific cell group based on the sfnOffset_1 for the specific service cell, and regard the time of the activation period action as the active time for the service cell belonging to the specific cell group. The terminal device 10 monitors the PDCCH during the active time. In the present embodiment, the operation performed by the terminal device 10 to determine the active time and / or the operation performed to monitor the PDCCH during the active time are also described as operations in DRX.

[0212] -Variant 1

[0213] The terminal device 10 may be configured to switch the formula. Fig.14 As shown, the control unit 110 of the terminal device 10 determines whether the aforementioned first offset information is received from the base station device 20 (S1201). In the case of receiving the aforementioned first offset information (S1201 "Yes"), the control unit 110 selects formula A2 (S1202). The control unit 110 uses formula A2 to start a long DRX cycle (S1204). In contrast, in the case of not receiving the aforementioned first offset information (S1201 "No"), the control unit 110 selects formula A1 (S1203). The control unit 110 uses formula A1 to start a long DRX cycle (S1204). For example, the terminal device 10 can select formula A1 and / or formula A2 based on the reception of information for selecting formula A1 and / or formula A2, and perform operations in DRX. For example, the base station device 20 can send an RRC message including information for selecting formula A1 and / or formula A2 to the terminal device 10. For example, the base station device 20 can configure information for selecting formula A1 and / or formula A2 for a specific cell group, and the terminal device 10 can select formula A1 and / or formula A2 in a service cell belonging to the specific cell group based on the information for selecting formula A1 and / or formula A2, and use the selected formula to perform operations in DRX.

[0214] According to the aforementioned configuration, the terminal device 10 is able to select an appropriate formula in accordance with the information from the base station device 20 .

[0215] -Variant 2

[0216] The base station apparatus 20 may use formulas A1 and A2 to determine the long DRX cycle in the terminal apparatus 10. In this case, the base station apparatus 20 may select the formula as follows. The control unit 210 of the base station apparatus 20 selects formula A2 when the first offset information is sent to the terminal apparatus 10. In contrast, the control unit 210 selects formula A1 when the first offset information is not sent to the terminal apparatus 10.

[0217] (2) Second Aspect

[0218] The control unit 110 starts the On period in Long DRX using the following formula A3. SFN_offset_1 is the remainder when the duration of one SFN cycle is divided by the duration of the Long DRX cycle. SFN_offset_1 is a value for correcting the start position of the On period in Long DRX in milliseconds from the time when SFN is updated to 0.

[0219] [Number 4]

[0220] [(SFN×10)+(SFN_offset_1×n)+subframe number]modulo(drx-LongCycle)=drx-StartOffset

[0221] where SFN_offset_1=(1024×10)modulo drx-LongCycle and n=n+1whenever SFN=0…(A3)

[0222] In addition, Formula A3 can also be modified into the following Formula A3-2. "SFN+SFN_offset_1 / 10×n" corresponds to the aforementioned addition operation. In this way, Formula A3 can also be modified into a formula in a form in which SFN is offset.

[0223] [Number 5]

[0224] {[(SFN+SFN_offset_1 / 10×n)×10]+subframe number}modulo(drx-LongCycle)=drx-StartOffset

[0225] where SFN_offset_1=(1024×10)modulo drx-LongCycleand n=n+1wheneverSFN=0…(A3-2)

[0226] The control unit 110 calculates SFN_offset_1 using drx-LongCycle, which is a DRX parameter. According to this configuration, the base station apparatus 20 does not need to newly notify the terminal apparatus 10 of SFN_offset_1 in addition to the DRX parameter. Signaling between the base station apparatus 20 and the terminal apparatus 10 can be reduced.

[0227] -Variant 1

[0228] The base station device 20 may send indication information (indication information, which may also be information for selecting formula A3, also recorded as first indication information below) to the terminal device 10 indicating the use of formula A3. For example, the base station device 20 may send an RRC message including the aforementioned first indication information to the terminal device 10. The aforementioned first indication information may be configured as a new element of the DRX-config IE. That is, the base station device 20 may send an RRC message including the aforementioned first indication information for a specific cell group to the terminal device 10. That is, the aforementioned first indication information may be configured for each of one or more cell groups (cell groups configured with DRX parameters). In addition, the aforementioned first indication information may also be configured for an IE other than the DRX-configIE. For example, the base station device 20 may send an RRC message to the terminal device 10, the RRC message including the aforementioned first indication information for a service cell belonging to a specific cell group. That is, the aforementioned first indication information may be configured for each of one or more service cells (each of the service cells belonging to the cell group configured with DRX parameters). The base station apparatus 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the aforementioned first indication information to the terminal apparatus 10. The base station apparatus 20 may send DCI including the aforementioned first indication information to the terminal apparatus 10.

[0229] -Variant 2

[0230] The terminal device 10 may be configured to switch the formula. Fig.15As shown, the control unit 110 of the terminal device 10 determines whether the following condition H1 is established (S1301). That is, the control unit 110 can determine whether the following condition H1 is satisfied. Hereinafter, in this embodiment, the establishment of a condition may refer to the satisfaction of the condition. In addition, in this embodiment, the failure of a condition may refer to the failure of the condition. That is, in this embodiment, whether a condition is established may refer to whether the condition is satisfied. Condition H1 is equivalent to the use condition for determining whether to use formula A3. Condition H1 is a combination of one or more selected from the following conditions h11 to h13.

[0231] h11: The terminal apparatus 10 receives from the base station apparatus 20 the configuration information of 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.

[0232] h12: The terminal apparatus 10 receives configuration information of a Long DRX cycle having a non-integer time length from the base station apparatus 20 .

[0233] h13: The terminal device 10 receives the aforementioned first instruction information from the base station device 20 .

[0234] In addition, throughout the present application, when the condition to be determined is composed of a combination of two or more conditions, the two or more conditions can be combined using OR and / or AND. The condition can be selected from all combinations obtained by combining such logical operations.

[0235] When the condition H1 is satisfied (S1301 "Yes"), the control unit 110 selects formula A3 (S1302). The control unit 110 uses formula A3 to start the long DRX cycle (S1304). On the other hand, when the condition H1 is not satisfied (S1301 "No"), the control unit 110 selects formula A1 (S1303). The control unit 110 uses formula A1 to start the long DRX cycle (S1304).

[0236] -Variant 3

[0237] The base station device 20 can use formulas A1 and A3 to determine the cycle of long DRX in the terminal device 10. In this case, the base station device 20 can select the formula as follows. The control unit 210 of the base station device 20 determines whether the following condition H2 is established. Condition H2 is equivalent to the 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.

[0238] h21: The base station device 20 transmits the aforementioned first instruction information to the terminal device 10 .

[0239] h22: The base station apparatus 20 transmits to the terminal apparatus 10 the configuration information of 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.

[0240] h23: The base station apparatus 20 transmits configuration information of a long DRX cycle having a non-integer time length to the terminal apparatus 10 .

[0241] When the condition H2 is satisfied, the control unit 210 selects the formula A3. On the other hand, when the condition H2 is not satisfied, the control unit 210 selects the formula A1.

[0242] (3) The third aspect

[0243] In addition, H-SFN can be used for operations in DRX. That is, the terminal device 10 can apply H-SFN to operations in DRX. When using (applying) H-SFN, the control unit 110 uses the following formula A4 to start the on period in long DRX. "SFN+H-SFN×1024" is equivalent to the aforementioned addition operation. The 1024 in "H-SFN×1024" is equivalent to the number of SFNs included in one cycle of H-SFN.

[0244] [Number 6]

[0245] {[(SFN+H-SFN×1024)×10]+subframe number}modulo(drx-LongCycle)=drx-StartOffset···(A4)

[0246] According to the above configuration, even when H-SFN is used, the interval (cycle) of the on period of Long DRX is maintained fixed. Even when SFN is updated from 1023 to 0, the cycle of Long DRX is maintained fixed without changing.

[0247] -Variant 1

[0248] The base station device 20 may send indication information indicating the use of formula A4 to the terminal device 10 (which may also be information for applying H-SFN to operations in DRX or information for selecting formula A4, also recorded as the second indication information below). For example, the base station device 20 may send an RRC message including the aforementioned second indication information to the terminal device 10. The aforementioned second indication information may be configured as a new element of the DRX-config IE. That is, the base station device 20 may send an RRC message including the aforementioned second indication information for a specific cell group to the terminal device 10. That is, the aforementioned second indication information may be configured for each of one or more cell groups (cell groups configured with DRX parameters). In addition, the aforementioned second indication information may also be a DRX- co nfig IE configuration other than the DRX parameter. For example, the base station device 20 may send an RRC message to the terminal device 10, and the RRC message includes the aforementioned second indication information for the service cell belonging to a specific cell group. That is, the aforementioned second indication information may be configured for each of one or more service cells (each of the service cells belonging to the cell group configured with the DRX parameters). The base station device 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the aforementioned second indication information to the terminal device 10. The base station device 20 may send a DCI including the aforementioned second indication information to the terminal device 10.

[0249] As described above, the base station device 20 can send system information (e.g., SIB1) to the terminal device 10, the system information including information indicating H-SFN and / or information indicating that extended DRX is allowed in the cell. That is, the terminal device 10 can apply H-SFN to the operation in DRX (can determine whether to apply H-SFN to the operation in DRX) based on the information indicating H-SFN, the information indicating that extended DRX is allowed in the cell, and / or the second indication information. That is, the terminal device 10 can use formula A4 for the operation in DRX (can determine whether to use formula A4 for the operation in DRX) based on the information indicating H-SFN, the information indicating that extended DRX is allowed in the cell, and / or the second indication information. For example, in the case where all of the information indicating H-SFN, the information indicating that extended DRX is allowed in the cell, and the second indication information are configured, the terminal device 10 can apply H-SFN to the operation in DRX. In addition, when at least one of the information indicating H-SFN, the information indicating that extended DRX is allowed in the cell, and the second indication information is not configured, the terminal device 10 may not apply H-SFN to the operation in DRX. For example, when H-SFN is not applied to the operation in DRX, the terminal device 10 may perform the operation in DRX based on formula A1.

[0250] In addition, as described above, the terminal device 10 can be transferred to any state of RRC connection, RRC inactive and RRC idle as the RRC state. That is, the terminal device 10 in the RRC connection state can apply H-SFN to the operation in DRX. That is, the terminal device 10 in the RRC connection state, the RRC inactive state, and / or the RRC idle state can be configured with information indicating H-SFN and / or information indicating that extended DRX is allowed in the cell. For example, the terminal device 10 in the RRC connection state can obtain information indicating H-SFN and / or information indicating that extended DRX is allowed in the cell (that is, SIB1 including information indicating H-SFN and / or information indicating that extended DRX is allowed in the cell) based on the second indication information (reception of the second indication information), and apply H-SFN to the operation in DRX.

[0251] -Variant 2

[0252] The terminal device 10 may be configured to switch the formula. Fig.16 As shown, the control unit 110 of the terminal device 10 determines whether the following condition H3 is satisfied (S1401). The condition H3 is equivalent to the use condition for determining whether to use the 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 can be a combination of h31 and h34.

[0253] h31: The terminal apparatus 10 receives from the base station apparatus 20 the configuration information of 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.

[0254] h32: The terminal apparatus 10 receives configuration information of a Long DRX cycle having a non-integer time length from the base station apparatus 20 .

[0255] h33: The terminal device 10 receives the aforementioned second instruction information from the base station device 20.

[0256] h34: The terminal device 10 receives information related to H-SFN from the base station device 20. The aforementioned information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (eg, SIB1).

[0257] When condition H3 is satisfied (S1401 "Yes"), control unit 110 selects formula A4 (S1402). Control unit 110 uses formula A4 to start a long DRX cycle (S1404). On the other hand, when condition H3 is not satisfied (S1401 "No"), control unit 110 selects formula A1 (S1403). Control unit 110 uses formula A1 to start a long DRX cycle (S1404).

[0258] According to the aforementioned configuration, the terminal apparatus 10 is able to select an appropriate formula according to the time length of the cycle of Long DRX and / or information from the base station apparatus 20 .

[0259] -Variant 3

[0260] The base station device 20 can use formulas A1 and A4 to determine the cycle of long DRX in the terminal device 10. In this case, the base station device 20 can select the formula as follows. The control unit 210 of the base station device 20 determines whether the following condition H4 is established. Condition H4 is equivalent to a usage condition for determining whether to use formula A4. Condition H4 is a combination of one or more selected from the following conditions h41 to h44. For example, condition H4 can be a combination of h41 and h44.

[0261] h41: The base station device 20 transmits the aforementioned second instruction information to the terminal device 10 .

[0262] h42: The base station apparatus 20 transmits to the terminal apparatus 10 the configuration information of 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.

[0263] h43: The base station apparatus 20 transmits configuration information of a long DRX cycle having a non-integer time length to the terminal apparatus 10 .

[0264] h44: The base station device 20 transmits information related to H-SFN to the terminal device 10. The aforementioned information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (eg, SIB1).

[0265] When the condition H4 is satisfied, the control unit 210 selects the formula A4. When the condition H4 is not satisfied, the control unit 210 selects the formula A1.

[0266] 1.8.3. Short DRX

[0267] (1) First aspect

[0268] The control unit 110 starts the On period in Short DRX using the following formula (B2).

[0269] [Number 7]

[0270] {[(SFN+sfnOffset_2×n)×10]+subframe number)modulo(drx-ShortCycle)=(drx-StartOffset)modulo(drx-ShortCycle)

[0271] Where n=n+1whenever SFN=0…(B2)

[0272] According to the above configuration, in short DRX, even when SFN is updated from 1023 to 0, the interval of the on period is maintained constant. Therefore, the possibility of mismatch between the timing of arrival of the signal from the base station apparatus 20 and the on period can be reduced. As a result, the occurrence of the above-mentioned delay and the increase of signaling due to the reconfiguration of the DRX parameters can be prevented.

[0273] The base station device 20 sends offset information related to sfnOffset 2 to the terminal device 10. The offset information related to sfnOffset 2 is called "second offset information". The base station device 20 may send an RRC message including the aforementioned second offset information to the terminal device 10. The aforementioned second offset information may be configured as a new element of the DRX-config IE. That is, the base station device 20 may send an RRC message including the aforementioned second offset information for a specific cell group to the terminal device 10. That is, the aforementioned second offset information may be configured for each of one or more cell groups (cell groups configured with DRX parameters). The aforementioned second offset information may also be an IE configuration other than the DRX-config IE. For example, the base station device 20 may send an RRC message to the terminal device 10, the RRC message including the aforementioned second offset information for a service cell belonging to a specific cell group. That is, the aforementioned second offset information may be configured for each of one or more service cells (each of the service cells belonging to a cell group configured with DRX parameters). The base station apparatus 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the aforementioned second offset information to the terminal apparatus 10. The base station apparatus 20 may send DCI including the aforementioned second offset information to the terminal apparatus 10. sfnOffset 2 in formula B2 may use the same value as sfnOffset 1 in formula A2. That is, when the base station apparatus 20 sends the first offset information related to sfnOffset 1 to the terminal apparatus 10, the second offset information related to sfnOffset_2 may not be sent to the terminal apparatus 10.

[0274] That is, the terminal device 10 can determine the active time for the service cell belonging to a specific cell group based on sfnOffset_2, and the sfnOffset_2 is configured for the specific cell group. That is, the terminal device 10 can start the activation period for the specific cell group based on sfnOffset_2 for the specific cell group, and regard the time of the activation period action as the active time for the service cell belonging to the specific cell group. The terminal device 10 monitors PDCCH during the active time. In addition, the terminal device 10 can determine the active time for the service cell belonging to a specific cell group (a cell group configured with DRX parameters) based on sfnOffset_2, and the sfnOffset_2 is configured for the service cell. That is, the terminal device 10 can start the activation period for the specific cell group based on sfnOffset_2 for the specific service cell, and regard the time of the activation period action as the active time for the service cell belonging to the specific cell group. The terminal device 10 monitors PDCCH during the active time.

[0275] -Variant 1

[0276] The terminal device 10 may be configured to switch the formula. Fig.17 As shown, the control unit 110 of the terminal device 10 determines whether the aforementioned second offset information is received from the base station device 20 (S1501). In the case of receiving the aforementioned second offset information (S1501 "Yes"), the control unit 110 selects formula B2 (S1502). The control unit 110 uses formula B2 to start the short DRX cycle (S1504). In contrast, in the case of not receiving the aforementioned second offset information (S1501 "No"), the control unit 110 selects formula B1 (S1503). The control unit 110 uses formula B1 to start the short DRX cycle (S1504). For example, the terminal device 10 can select formula B1 and / or formula B2 based on the reception of information for selecting formula B1 and / or formula B2, and perform operations in DRX. For example, the base station device 20 can send an RRC message including information for selecting formula B1 and / or formula B2 to the terminal device 10. For example, the base station device 20 can configure information for selecting formula B1 and / or formula B2 for a specific cell group, and the terminal device 10 can select formula B1 and / or formula B2 in a service cell belonging to the specific cell group based on the information for selecting formula B1 and / or formula B2, and use the selected formula to perform operations in DRX.

[0277] According to the aforementioned configuration, the terminal device 10 is able to select an appropriate formula in accordance with the information from the base station device 20 .

[0278] -Variant 2

[0279] The base station device 20 may use formulas B1 and B2 to determine the short 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 selects formula B2 when the second offset information is sent to the terminal device 10. The control unit 210 selects formula B1 when the second offset information is not sent to the terminal device 10.

[0280] (2) Second Aspect

[0281] 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 for correcting the start position of the On period in Short DRX in milliseconds from the time point when SFN is updated to 0.

[0282] [Number 8]

[0283] [(SFN×10)+(SFN_offset_2×n)+subframe number]modulo(drx-ShortCycle)=(drx-StartOffset)modulo(drx-ShortCycle)

[0284] where SFN_offset_2=(1024×10)modulo drx-ShortCycle and n=n+1whenever SFN=0···(B3)

[0285] In addition, the formula B3 can also be modified into the following formula B3-2. "SFN+SFN_offset_2 / 10×n" corresponds to the aforementioned addition operation. In this way, the formula B3 can also be modified into a formula in a format in which the SFN is offset.

[0286] [Number 9]

[0287] {[(SFN+SFN_offset_2 / 10×n)×10]+subframe number}modulo(drx-ShortCycle)=(drx-StartOffset)modulo(drx-ShortCycle)

[0288] where SFN_offset_2=(1024×10)modulo drx-ShortCycleand n=n+1wheneverSFN=0···(B3-2)

[0289] The control unit 110 calculates SFN_offset_2 using drx-shortCycle, which is a DRX parameter. According to this configuration, the base station apparatus 20 does not need to newly notify the terminal apparatus 10 of SFN_offset_2 in addition to the DRX parameter. Signaling between the base station apparatus 20 and the terminal apparatus 10 can be reduced.

[0290] -Variant 1

[0291] The base station device 20 may send indication information indicating the use of formula B3 to the terminal device 10 (which may also be information for selecting formula B3, also recorded as the third indication information below). For example, the base station device 20 may send an RRC message including the aforementioned third indication information to the terminal device 10. The aforementioned third indication information may be configured as a new element of the DRX-config IE. That is, the base station device 20 may send an RRC message including the aforementioned third indication information for a specific cell group to the terminal device 10. That is, the aforementioned third indication information may be configured for each of one or more cell groups (cell groups configured with DRX parameters). In addition, the aforementioned third indication information may also be an IE configuration other than the DRX-config IE. For example, the base station device 20 may send an RRC message to the terminal device 10, the RRC message including the aforementioned third indication information for a service cell belonging to a specific cell group. That is, the aforementioned third indication information may be configured for each of one or more service cells (each of the service cells belonging to the cell group configured with DRX parameters). The base station apparatus 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the third indication information to the terminal apparatus 10. The base station apparatus 20 may send DCI including the third indication information to the terminal apparatus 10.

[0292] -Variant 2

[0293] The terminal device 10 may be configured to switch the formula. Fig.18 As shown, the control unit 110 of the terminal device 10 determines whether the following condition H5 is satisfied (S1601). The condition H5 corresponds to the use condition for determining whether to use the formula B3. The condition H5 is one or a combination of two or more selected from the following conditions h51 to h53.

[0294] h51: The terminal apparatus 10 receives from the base station apparatus 20 the configuration information of 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.

[0295] h52: The terminal apparatus 10 receives configuration information of a short DRX cycle having a non-integer time length from the base station apparatus 20 .

[0296] h53: The terminal device 10 receives the aforementioned third instruction information from the base station device 20.

[0297] When the condition H5 is satisfied ("Yes" in S1601), the control unit 110 selects the formula B3 (S1602). The control unit 110 uses the formula B3 to start the short DRX cycle (S1604). On the other hand, when the condition H5 is not satisfied ("No" in S1601), the control unit 110 selects the formula B1 (S1603). The control unit 110 uses the formula B1 to start the short DRX cycle (S1604).

[0298] -Variant 3

[0299] The base station device 20 can use formulas B1 and B3 to determine the cycle of short DRX in the terminal device 10. In this case, the base station device 20 can select the formula as follows. The control unit 210 of the base station device 20 determines whether the following condition H6 is established. Condition H6 is equivalent to the 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.

[0300] h61: The base station device 20 transmits the third instruction information to the terminal device 10 .

[0301] h62: The base station apparatus 20 transmits to the terminal apparatus 10 the configuration information of 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.

[0302] h63: The base station apparatus 20 transmits the configuration information of the short DRX cycle having a non-integer time length to the terminal apparatus 10 .

[0303] When the condition H6 is satisfied, the control unit 210 selects the formula B3. On the other hand, when the condition H6 is not satisfied, the control unit 210 selects the formula B1.

[0304] (3) The third aspect

[0305] In addition, H-SFN can be used for operation in short DRX. That is, the terminal device 10 can apply H-SFN to operation in short DRX. When using (applying) H-SFN, the control unit 110 uses the following formula B4 to start the on period in short DRX.

[0306] [Number 10]

[0307] {[(SFN+H-SFN×1024)×10]+subframe number}modulo(drx-ShortCycle)

[0308] =(drx-StartOffset)modulo(drx-ShortCycle)···(B4)

[0309] According to the aforementioned configuration, even when H-SFN is used, the short DRX cycle is maintained fixed. Even when SFN is updated from 1023 to 0, the long DRX cycle is maintained fixed without changing.

[0310] -Variant 1

[0311] The base station device 20 may send indication information indicating the use of formula B4 to the terminal device 10 (which may also be information for applying H-SFN to operations in DRX or information for selecting formula B4, which may be also recorded as the fourth indication information below). For example, the base station device 20 may send an RRC message including the aforementioned fourth indication information to the terminal device 10. The aforementioned fourth indication information may be configured as a new element of the DRX-config IE. That is, the base station device 20 may send an RRC message including the aforementioned fourth indication information for a specific cell group to the terminal device 10. That is, the aforementioned fourth indication information may be configured for each of one or more cell groups (cell groups configured with DRX parameters). In addition, the aforementioned fourth indication information may also be an IE configuration other than the DRX-config IE. For example, the base station device 20 may send an RRC message to the terminal device 10, the RRC message including the aforementioned fourth indication information for a service cell belonging to a specific cell group. That is, the aforementioned fourth indication information may be configured for each of one or more service cells (each of the service cells belonging to the cell group configured with DRX parameters). The base station apparatus 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the fourth indication information to the terminal apparatus 10. The base station apparatus 20 may send DCI including the fourth indication information to the terminal apparatus 10.

[0312] As described above, the base station device 20 may send system information (e.g., SIB1) to the terminal device 10, the system information including information indicating H-SFN and / or information indicating that extended DRX is allowed in the cell. That is, the terminal device 10 may apply H-SFN to operations in DRX (may determine whether H-SFN is applied to operations in DRX) based on the information indicating H-SFN, the information indicating that extended DRX is allowed in the cell, and / or the fourth indication information. That is, the terminal device 10 may use formula B4 for operations in DRX (may determine whether formula B4 is used for operations in DRX) based on the information indicating H-SFN, the information indicating that extended DRX is allowed in the cell, and / or the fourth indication information. For example, in the case where all of the information indicating H-SFN, the information indicating that extended DRX is allowed in the cell, and the fourth indication information are configured, the terminal device 10 may apply H-SFN to operations in DRX. In addition, when at least one of the information indicating H-SFN, the information indicating that extended DRX is allowed in the cell, and the fourth indication information is not configured, the terminal device 10 may not apply H-SFN to the operation in DRX. For example, when H-SFN is not applied to the operation in DRX, the terminal device 10 may perform the operation in DRX based on formula B1.

[0313] In addition, as described above, the terminal device 10 in the RRC connected state can apply H-SFN to the operation in DRX. That is, the terminal device 10 in the RRC connected state, the RRC inactive state, and / or the RRC idle state can be configured with information indicating H-SFN and / or information indicating that extended DRX is allowed in the cell. For example, the terminal device 10 in the RRC connected state can obtain information indicating H-SFN and / or information indicating that extended DRX is allowed in the cell (that is, SIB1 including information indicating H-SFN and / or information indicating that extended DRX is allowed in the cell) based on the fourth indication information (reception of the fourth indication information), and apply H-SFN to the operation in DRX.

[0314] -Variant 2

[0315] The terminal device 10 may be configured to switch the formula. Fig.19 As shown, the control unit 110 of the terminal device 10 determines whether the following condition H7 is satisfied (S1701). The condition H7 is equivalent to the use condition for determining whether to use the formula B4. The condition H7 is one or a combination of two or more selected from the following conditions h71 to h74. For example, the condition H7 can be a combination of h71 and h74.

[0316] h71: The terminal apparatus 10 receives from the base station apparatus 20 the configuration information of 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.

[0317] h72: The terminal apparatus 10 receives configuration information of a short DRX cycle having a non-integer time length from the base station apparatus 20 .

[0318] h73: The terminal device 10 receives the aforementioned fourth instruction information from the base station device 20.

[0319] h74: The terminal device 10 receives information related to H-SFN from the base station device 20. The aforementioned information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (eg, SIB1).

[0320] When condition H7 is satisfied (S1701 "Yes"), control unit 110 selects formula B4 (S1702). Control unit 110 uses formula B4 to start the short DRX cycle (S1704). On the other hand, when condition H7 is not satisfied (S1701 "No"), control unit 110 selects formula B1 (S1703). Control unit 110 uses formula B1 to start the short DRX cycle (S1704).

[0321] According to the aforementioned configuration, the terminal apparatus 10 is able to select an appropriate formula according to the time length of the cycle of short DRX and / or information from the base station apparatus 20 .

[0322] -Variant 3

[0323] The base station device 20 can use formulas B1 and B4 to determine the cycle of long DRX in the terminal device 10. In this case, the base station device 20 can select the formula as follows. The control unit 210 of the base station device 20 determines whether the following condition H8 is established. Condition H8 is equivalent to the use condition for determining whether to use formula B4. Condition H8 is a combination of one or more selected from the following conditions h81 to h84. For example, condition H8 can be a combination of h81 and h84.

[0324] h81: The base station device 20 transmits the aforementioned fourth instruction information to the terminal device 10 .

[0325] h82: The base station apparatus 20 transmits to the terminal apparatus 10 the configuration information of 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.

[0326] h83: The base station apparatus 20 transmits the configuration information of the short DRX cycle having a non-integer time length to the terminal apparatus 10 .

[0327] h84: The base station device 20 transmits information related to H-SFN to the terminal device 10. The aforementioned information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (eg, SIB1).

[0328] When the condition H8 is satisfied, the control unit 210 selects the formula B4. When the condition H8 is not satisfied, the control unit 210 selects the formula B1.

[0329] 2. Second Implementation

[0330] 2.1. Configuration Overview

[0331] Regarding other periodic operations using SFN, the problem of not being able to maintain a fixed periodicity may also arise. The following is an example of such an operation.

[0332] -Periodic transmission operation by the base station apparatus 200 in SPS

[0333] -Periodic transmission operation of SR by the terminal device 100

[0334] - Periodic transmission operation by terminal device 100 in CG

[0335] In the above operation, a formula for determining the timing of performing periodic operation is used. SFN is used in the formula. As described in the first embodiment, when such a formula is used, due to the value of the configured periodicity, the following problem arises: when SFN is updated from 1023 to 0, the operation period is not maintained fixed.

[0336] In this embodiment, a correction value may be applied to SFN in the formulas used in SPS, SR, and CG.

[0337] The control unit 110 of the terminal device 10 uses a formula including a correction value for SFN to perform periodic operation of transmission or reception. Furthermore, the control unit 210 of the base station device 20 uses a formula including a correction value for SFN to perform periodic operation of transmission or reception.

[0338] The above formula includes the addition of SFN and the above correction value. The above correction value is a value that will not be zero even if SFN is updated from 1023 to 0. According to this configuration, when SFN is updated from 1023 to 0, the value of the above addition will not be zero. Thus, the cycle of operation is maintained fixed.

[0339] The correction value may be a value that increases as the number of times 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 SFN is updated from 1023 to 0 and a second value for offsetting SFN. For example, the correction value may be the product of the first value and the second value. According to this configuration, the SFN in the above formula is appropriately offset according to the number of times SFN is updated from 1023 to 0. Thus, the cycle of operation is maintained fixed. Therefore, the possibility of delays can be reduced. Furthermore, the possibility of increased signaling due to parameter reconfiguration can also be reduced. Below, the formulas applied to each of SPS, SR, and CG are described in more detail.

[0340] 2.2.SPS (Semi-Persistent Scheduling)

[0341] In order to allocate downlink resources in SPS, the following formula C1 can be used.

[0342] [Number 11]

[0343] (numberOfSlotsPerFrame×SFN+slot number in the frame)

[0344] =[(numberOfslotsPerFrame×SFN start time +slot start time )+N×periodicity×numberOfSlotsPerFrame / 10]modulo

[0345] (1024×numberOfSlotsPerFrame)···(C1)

[0346] The parameters in formula C1 are as follows.

[0347] -numberOfSlotsPerFrame: the number of slots included in one radio frame.

[0348] -SFN start time: The SFN of the first PDSCH transmission timing when downlink allocation is initialized or reinitialized is used.

[0349] -Slot start time: The time slot number of the first PDSCH transmission timing when downlink allocation is initialized or reinitialized.

[0350] -periodicity: downlink allocation period configured for PDSCH.

[0351] In addition, the parameter periodicity in the SPS is equivalent to the transmission period of the base station device 20, which is included in the SPS-Config IE as described above. In addition, the unit of the parameter periodicity is milliseconds. For example, the base station device 20 may send an RRC message to the terminal device 10, and the RRC message includes parameters related to the SPS for a specific service cell (ie, SPS-Config IE). That is, the parameters related to the SPS (ie, SPS-Config IE) may be configured for each of one or more service cells. In addition, the base station device 20 may send an RRC message to the terminal device 10, and the RRC message includes parameters related to the SPS for a specific DL-BWP (ie, SPS-Config IE). That is, the parameters related to the SPS (ie, SPS-Config IE) may be configured for each of one or more DL-BWPs. The terminal device 10 may identify the parameters related to the SPS for each of one or more DL-BWPs (ie, SPS-Config IE).

[0352] The base station device 20 allocates the Nth downlink resource at the SFN and time slot number that satisfy formula C1. The base station device 20 uses the allocated resources to perform a transmission operation. For example, when a DCI (i.e., a DCI for scheduling PDSCH) to which a CRC encrypted with CS-RNTI is added indicates the activation of SPS (i.e., when PDCCH indicates the activation of SPS), the terminal device 10 can store (store) the DCI as a configured downlink assignment. Here, the DCI (DCI format) for scheduling PDSCH is also referred to as a downlink assignment. In addition, the terminal device 10 may assume that after the downlink assignment is configured for SPS, the Nth downlink assignment occurs in sequence at the SFN and time slot number that satisfy formula C1. That is, the terminal device 10 may assume that the stored downlink assignment occurs in sequence at the SFN and time slot number that satisfy formula C1 to perform PDSCH reception. Similarly, the base station device 20 can assume that at the SFN and time slot number that satisfy the formula C1, the downlink allocation stored in the terminal device 10 occurs in sequence to perform the transmission of the PDSCH. In the following, the terminal device 10 assumes that the stored downlink allocation occurs in sequence based on a specific formula to perform the reception of the PDSCH, which is also recorded as the reception operation of the PDSCH using the formula (referred to as the reception operation for short). Here, the reception operation of the PDSCH using the formula also includes the terminal device 10 simply performing the reception of the PDSCH. In addition, the base station device 20 assumes that the stored downlink allocation occurs in sequence based on a specific formula to perform the transmission of the PDSCH, which is also recorded as the transmission operation of the PDSCH using the formula (referred to as the transmission operation for short). Here, the transmission operation of the PDSCH using the formula also includes the base station device 20 simply performing the transmission of the PDSCH.

[0353] When the time length of one cycle of SFN is not an integral multiple of the time length (i.e., periodicity) of the transmission period of the base station device 20, the time length of the transmission period changes at the time point when SFN is updated from 1023 to 0. Therefore, the problem of not being able to maintain a fixed transmission period arises. The following describes aspects of solving this problem.

[0354] (1) First aspect

[0355] like Fig. 20As shown, the control unit 210 of the base station device 20 sends an RRC message including SPS parameters to the terminal device 10 via the communication unit 220 (S1801). The control unit 210 sends DCI scrambled by CS-RNTI to the terminal device 10 via the communication unit 220 (S1802). As a result, the periodic transmission operation using the PDSCH is activated.

[0356] 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" is equivalent to the aforementioned correction value. n is a value that increases by 1 every time SFN becomes 0, which is equivalent to the aforementioned first value. sfnOffset_3 is a value used to offset SFN, which is equivalent to the aforementioned second value.

[0357] [Number 12]

[0358] [numberOfSlotsPerFrame×(SFN+sfnOffset_3×n)+slot number in theframe]=[(numberOfslotsPerFrame×SFN start time +slot start time )+N×periodicity×numberOfSlotsPerFrame / 10]modulo(1024×numberOfSlotsPerFrame)

[0359] Where n=n+1whenever SFN=0…(C2)

[0360] According to the aforementioned configuration, the base station apparatus 20 can perform a transmission operation at a fixed cycle even when the SFN is updated from 1023 to 0. Furthermore, the terminal apparatus 10 can perform a reception operation at a fixed cycle in coordination with the transmission operation of the base station apparatus 20 .

[0361] The base station device 20 sends the 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 send an RRC message including the aforementioned third offset information to the terminal device 10. For example, the base station device 20 may configure the aforementioned third offset information for the service cell and / or DL-BWP configured with the parameters of the SPS. That is, the aforementioned third offset information may be configured for each of one or more service cells. In addition, the aforementioned third offset information may be configured for each of one or more DL-BWPs. The aforementioned third offset information may be configured as a new element of the SPS-config IE. That is, the base station device 20 may send an RRC message to the terminal device 10, which includes the aforementioned third offset information for a specific service cell and / or a specific DL-BWP. That is, the aforementioned third offset information may be configured for each of one or more service cells and / or each of one or more DL-BWPs (each of the service cells and / or DL-BWPs configured with SPS parameters). The aforementioned third offset information may also be configured for an IE other than the SPS-config IE. The base station device 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the aforementioned third offset information to the terminal device 10. The base station device 20 may send DCI including the aforementioned third offset information to the terminal device 10. That is, the base station device 20 may send the aforementioned third offset information for a specific service cell and / or a specific DL-BWP, and based on the third offset information, perform a transmission operation of the PDSCH in the specific service cell and / or the specific DL-BWP. In addition, the terminal device 10 may receive the aforementioned third offset information for a specific service cell and / or a specific DL-BWP, and based on the third offset information, perform a reception operation of the PDSCH in the specific service cell and / or the specific DL-BWP.

[0362] -Variant 1

[0363] The base station device 20 may be configured to switch the formula. The control unit 210 of the base station device 20 may select the formula according to the transmission of the third offset information. Fig.21 As shown, when the third offset information is sent (S1901 "Yes"), the control unit 210 selects formula C2 (S1902). The control unit 210 performs a periodic sending operation using formula C2 (S1904). In contrast, when the third offset information is not sent (S1901 "No"), the control unit 210 selects formula C1 (S1903). The control unit 210 performs a periodic sending operation using formula C1 (S1904).

[0364] -Variant 2

[0365] The terminal device 10 may be configured to switch the formula. Fig. 22 As shown, the control unit 110 of the terminal device 10 determines whether the third offset information is received from the base station device 20 (S2001). In the case of receiving the third offset information (S2001 "Yes"), the control unit 110 selects formula C2 (S2002). The control unit 110 performs a periodic reception operation using formula C2 (S2004). In contrast, in the case of not receiving the third offset information (S2001 "No"), the control unit 110 selects formula C1 (S2003). The control unit 110 performs a periodic reception operation using formula C1 (S2004).

[0366] According to the aforementioned configuration, the terminal device 10 is able to select an appropriate formula in accordance with the information from the base station device 20 .

[0367] (2) Second Aspect

[0368] 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 aforementioned second value. SFN_offset_3 is the remainder when the time length of one cycle of SFN is divided by the time length of the transmission period of the base station device 20.

[0369] [Number 13]

[0370] [numberOfSlotsPerFrame×(SFN+SFN_offset_3 / 10×n)+slot number in theframe]=[(numberOfSlotsPerFrame×SFN start time +slot start time )+N×periodicity×numberOfSlotsPerFrame / 10]modulo(1024×numberOfSlotsPerFrame)

[0371] Where SFN_offset_3=(1024×10)modulo periodicity

[0372] n=n+1whenever SFN=0…(C3)

[0373] According to the aforementioned configuration, the control unit 210 of the base station device 20 calculates SFN_offset_3 based on periodicity, which is a parameter of the SPS. 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, in addition to the parameters of the SPS, the base station device 20 does not need to newly notify the terminal device 10 of SFN_offset_3. The signaling between the base station device 20 and the terminal device 10 can be reduced.

[0374] -Variant 1

[0375] The base station device 20 may send an indication information indicating the use of formula C3 to the terminal device 10 (which may also be information for selecting formula C3, which may be recorded as the fifth indication information below). The base station device 20 may send an RRC message including the fifth indication information to the terminal device 10. For example, the base station device 20 may configure the fifth indication information for the service cell and / or DL-BWP configured with the parameters of the SPS. That is, the fifth indication information may be configured for each of one or more cell groups. In addition, the fifth indication information may be configured for each of one or more DL-BWPs. The fifth indication information may be configured as a new element of the SPS-config IE. That is, the base station device 20 may send an RRC message to the terminal device 10, which includes the fifth indication information for a specific service cell and / or a specific DL-BWP. That is, the fifth indication information may be configured for each of one or more service cells and / or each of one or more DL-BWPs (each of the service cells and / or DL-BWPs configured with SPS parameters). The fifth indication information may also be configured as an IE configuration other than the SPS-config IE. The base station device 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the aforementioned fifth indication information to the terminal device 10. The base station device 20 may send DCI including the aforementioned fifth indication information to the terminal device 10. That is, the base station device 20 may send the aforementioned fifth indication information for a specific service cell and / or a specific DL-BWP, and based on the fifth indication information, perform a transmission operation of the PDSCH in the specific service cell and / or the specific DL-BWP. In addition, the terminal device 10 may receive the aforementioned fifth indication information for a specific service cell and / or a specific DL-BWP, and based on the fifth indication information, perform a reception operation of the PDSCH in the specific service cell and / or the specific DL-BWP.

[0376] -Variant 2

[0377] The base station apparatus 20 may be configured to switch the formula. Fig.23 As shown, when the fifth indication information is sent (S2101 "Yes"), the control unit 210 selects formula C3 (S2102). The control unit 210 performs a periodic sending operation using formula C3 (S2104). In contrast, when the fifth indication information is not sent (S2101 "No"), the control unit 210 selects formula C1 (S2103). The control unit 210 performs a periodic sending operation using formula C1 (S2104).

[0378] In addition, the control unit 210 of the base station device 20 can select one of the formulas C1 and C3 based on the value of periodicity which is a parameter of the SPS. That is, the control unit 210 can 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.

[0379] i01: The base station apparatus 20 transmits, to the terminal apparatus 10 , transmission cycle configuration information in which the time length of one cycle of the SFN is not an integral multiple of the time length of the transmission cycle of the base station apparatus 20 .

[0380] i02: The base station apparatus 20 transmits configuration information of the transmission cycle of the base station apparatus 20 with a time length of a non-integer value to the terminal apparatus 10 .

[0381] For example, when the condition I0 is satisfied, the control unit 210 may select the formula C3. For example, when the condition I0 is not satisfied, the control unit 210 may select the formula C1.

[0382] -Variant 3

[0383] The terminal device 10 may be configured to switch the formula. Fig.24 As shown, the control unit 110 of the terminal device 10 determines whether the following condition I1 is satisfied (S2201). The condition I1 corresponds to the use condition for determining whether to use the formula C3. The condition I1 is one or a combination of two or more selected from the following conditions i11 to i13.

[0384] i11: The terminal apparatus 10 receives from the base station apparatus 20 the configuration information of the transmission cycle of the base station apparatus 20 , in which the time length of one cycle of the SFN is not an integral multiple of the time length of the transmission cycle of the base station apparatus 20 .

[0385] i12: The terminal device 10 receives, from the base station device 20 , configuration information of the transmission cycle of the base station device 20 , the time length of which is a non-integer value.

[0386] i13: The terminal device 10 receives the fifth instruction information from the base station device 20 .

[0387] When condition I1 is satisfied (S2201 "Yes"), control unit 110 selects formula C3 (S2202). Control unit 110 performs a periodic receiving operation using formula C3 (S2204). In contrast, when condition I1 is not satisfied (S2201 "No"), control unit 110 selects formula C1 (S2203). Control unit 110 performs a periodic receiving operation using formula C1 (S2204).

[0388] According to the aforementioned configuration, the terminal device 10 is able to 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 .

[0389] (3) The third aspect

[0390] The case of using (applying) H-SFN is 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 aforementioned addition operation. The 1024 in "H-SFN×1024" corresponds to the number of SFNs included in one cycle of H-SFN.

[0391] [Number 14]

[0392] [numberOfSlotsPerFrame×(SFN+H-SFN×1024)+slot number in the frame]=[(numberOfSlotsPerFrame×SFN start time +slot start time )+N×periodicity×numberOfSlotsPerFrame / 10]modulo(1024×numberOfslotsPerFrame)···(C4)

[0393] According to the aforementioned configuration, even when H-SFN is used, the transmission cycle of the base station apparatus 20 is maintained fixed. Even when SFN is updated from 1023 to 0, the cycle of Long DRX is maintained fixed without changing.

[0394] -Variant 1

[0395] The base station device 20 may send an indication information indicating the use of formula C4 to the terminal device 10 (which may also be information for applying H-SFN in SPS or information for selecting formula C4, which may also be recorded as the sixth indication information below). For example, the base station device 20 may send an RRC message including the aforementioned sixth indication information to the terminal device 10. For example, the base station device 20 may configure the aforementioned sixth indication information for the service cell and / or DL-BWP configured with the parameters of the SPS. That is, the aforementioned sixth indication information may be configured for each of one or more cell groups. In addition, the aforementioned sixth indication information may be configured for each of one or more DL-BWPs. The aforementioned sixth indication information may be configured as a new element of SPS-configIE. That is, the base station device 20 may send an RRC message to the terminal device 10, which includes the aforementioned sixth indication information for a specific service cell and / or a specific DL-BWP. That is, the aforementioned sixth indication information may be configured for each of one or more service cells and / or each of one or more DL-BWPs (each of the service cells and / or DL-BWPs configured with SPS parameters). The aforementioned sixth indication information may also be an IE configuration other than the SPS-config IE. The base station device 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the aforementioned sixth indication information to the terminal device 10. The base station device 20 may send a DCI including the aforementioned sixth indication information to the terminal device 10. That is, the base station device 20 may send the aforementioned sixth indication information for a specific service cell and / or a specific DL-BWP, and based on the sixth indication information, perform a sending operation of the PDSCH in the specific service cell and / or the specific DL-BWP. In addition, the terminal device 10 may receive the aforementioned sixth indication information for a specific service cell and / or a specific DL-BWP, and based on the sixth indication information, perform a receiving operation of the PDSCH in the specific service cell and / or the specific DL-BWP.

[0396] -Variant 2

[0397] The base station apparatus 20 may be configured to switch the formula. Fig.25 As shown, the control unit 210 of the base station device 20 determines whether the following condition I2 is satisfied (S2301). The condition I2 corresponds to the 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.

[0398] i21: The base station device 20 transmits the aforementioned sixth instruction information to the terminal device 10 .

[0399] i22: The base station apparatus 20 transmits to the terminal apparatus 10 configuration information of the transmission cycle of the base station apparatus 20 , in which the time length of one cycle of the SFN is not an integral multiple of the time length of the transmission cycle of the base station apparatus 20 .

[0400] i23: The base station apparatus 20 transmits configuration information of the transmission cycle of the base station apparatus 20 to the terminal apparatus 10 with a time length that is a non-integer value.

[0401] i24: The base station device 20 transmits the information related to the H-SFN to the terminal device 10. The aforementioned information related to the H-SFN may be eDRX-Allowed and / or hyperSFN included in the system information (eg, SIB1).

[0402] When condition I2 is satisfied (S2301 "Yes"), control unit 210 selects formula C4 (S2302). Control unit 210 performs a periodic transmission operation using formula C4 (S2304). In contrast, when condition I2 is not satisfied (S2301 "No"), control unit 210 selects formula C1 (S2303). Control unit 210 performs a periodic transmission operation using formula C1 (S2304).

[0403] -Variant 3

[0404] The terminal device 10 may be configured to switch the formula. Fig.26 As shown, the control unit 110 of the terminal device 10 determines whether the following condition I3 is established (S2401). Condition I3 is equivalent to the use condition for determining whether to use formula C4. Condition I3 is a combination of one or more selected from the following conditions i31 to i34. For example, condition I3 can be a combination of i31 and i34.

[0405] i31: The terminal device 10 receives from the base station device 20 the configuration information of the transmission cycle 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 cycle of the base station device 20.

[0406] i32: The terminal device 10 receives, from the base station device 20 , configuration information of the transmission cycle of the base station device 20 , the time length of which is a non-integer value.

[0407] i33: The terminal device 10 receives the aforementioned sixth instruction information from the base station device 20.

[0408] i34: The terminal device 10 receives information related to H-SFN from the base station device 20. The aforementioned information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (eg, SIB 1).

[0409] When condition I3 is satisfied (S2401 "Yes"), control unit 110 selects formula C4 (S2402). Control unit 110 performs a periodic receiving operation using formula C4 (S2404). In contrast, when condition I3 is not satisfied (S2401 "No"), control unit 110 selects formula C1 (S2403). Control unit 110 performs a periodic receiving operation using formula C1 (S2404).

[0410] According to the aforementioned configuration, the terminal device 10 is able to 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 .

[0411] 2.3. Scheduling Request (SR)

[0412] To determine the timing of sending the SR, the following formula D1 may be used.

[0413] [Number 15]

[0414] (n f ·N frame，μ slot +n μ s，f -SR OFFSET )mod SR PERIoDICITY =0

[0415] ···(D1)

[0416] The parameters in formula D1 are as follows.

[0417] -n f :SFN

[0418] -n frame，u slot : Number of time slots per frame

[0419] -SR OFFSET : Time slot offset

[0420] -n u s,f : timeslot number within the frame

[0421] -SRperiodicity: SR sending period.

[0422] In addition, the parameter SRperiodicity in SR is equivalent to the transmission period of the terminal device 10, which is included in the SchedulingRequestResourceConfig IE as described above. In addition, the parameter SRperiodicity is configured in units of the number of time slots or the number of symbols. Formula D1 is used when the SRperiodicity is greater than one time slot. Below, an example in which the parameter SRperiodicity is configured in units of the number of time slots is described, but the "number of time slots" in the following description can be replaced by "number of symbols".

[0423] For example, the base station device 20 may send an RRC message to the terminal device 10, the RRC message including parameters related to the SR for a specific service cell (i.e., SchedulingRequestResourceConfig IE). That is, the parameters related to the SR (i.e., SchedulingRequestResourceConfig IE) may be configured for each of one or more service cells. In addition, the base station device 20 may send an RRC message to the terminal device 10, the RRC message including parameters related to the SR for a specific UL-BWP (i.e., SchedulingRequestResourceConfig IE). That is, the parameters related to the SR (i.e., SchedulingRequestResourceConfig IE) may be configured for each of one or more UL-BWPs. The terminal device 10 may identify the parameters related to the SR for each of the one or more UL-BWPs (i.e., SchedulingRequestResourceConfig IE).

[0424] The terminal device 10 determines the SR transmission timing at the SFN and the time slot number that satisfy the formula D1. When the number of time slots included in one cycle of the SFN is not an integer multiple of the number of time slots as the transmission period of the terminal device 10 (i.e., SRperiodicity), the transmission period changes at the time point when the SFN is updated from 1023 to 0. Therefore, the problem of not being able to maintain a fixed transmission period arises. The following describes aspects of solving this problem.

[0425] (1) First aspect

[0426] like Fig. 27As shown, the control unit 210 of the base station device 20 sends 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 uses the following formula D2 to perform a periodic transmission operation of the SR (S2502). The control unit 210 of the base station device 20 uses the following formula D2 to perform a periodic reception operation of the SR (S2503). n is equivalent to the aforementioned first value. sfnOffset_4 is used to offset n f (ie, SFN) is equivalent to the aforementioned second value.

[0427] [Number 16]

[0428] [(n f +sfnOffset_4×n)·N frame，μ slot +n μ s，f -SR OFFSET ]mod SR PERIODICITY =0

[0429] Where n=n+1 whenever SFN=0···(D2)

[0430] According to the aforementioned configuration, even when SFN is updated from 1023 to 0, the terminal device 10 can transmit SR to the base station device 20 at a fixed cycle. Furthermore, the base station device 20 can perform a reception operation at a fixed cycle in coordination with the transmission operation of the terminal device 10.

[0431] The base station device 20 sends the 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 send an RRC message including the aforementioned fourth offset information to the terminal device 10. For example, the base station device 20 may configure the aforementioned fourth offset information for the service cell and / or UL-BWP in which the parameters of the SR are configured. That is, the aforementioned fourth offset information may be configured for each of one or more service cells. In addition, the aforementioned fourth offset information may be configured for each of one or more UL-BWPs. The aforementioned fourth offset information may be configured as a new element of the SchedulingRequestResourceConfig IE. That is, the base station device 20 may send an RRC message to the terminal device 10, which includes the aforementioned fourth offset information for a specific service cell and / or a specific UL-BWP. That is, the aforementioned fourth offset information may be configured for each of one or more service cells and / or each of one or more UL-BWPs (each of the service cells and / or UL-BWPs configured with the parameters of the SR). The aforementioned fourth offset information may also be configured for an IE other than the SchedulingRequestResourceConfig IE. The base station device 20 may send system information (SI, such as SIB 1 and / or SIBs other than SIB1) including the aforementioned fourth offset information to the terminal device 10. The base station device 20 may send DCI including the aforementioned fourth offset information to the terminal device 10. That is, the base station device 20 may send the aforementioned fourth offset information for a specific service cell and / or a specific UL-BWP, and based on the fourth offset information, perform a reception operation of the PUCCH in the specific service cell and / or the specific UL-BWP. In addition, the terminal device 10 may receive the aforementioned fourth offset information for a specific service cell and / or a specific UL-BWP, and based on the fourth offset information, perform a transmission operation of the PUCCH in the specific service cell and / or the specific UL-BWP.

[0432] -Variant 1

[0433] The base station device 20 may be configured to switch the formula. The control unit 210 of the base station device 20 may select the formula according to the transmission of the fourth offset information. Fig.28As shown, when the fourth offset information is sent (S2601 "Yes"), the control unit 210 selects formula D2 (S2602). The control unit 210 performs a periodic receiving operation using formula D2 (S2604). In contrast, when the fourth offset information is not sent (S2601 "No"), the control unit 210 selects formula D1 (S2603). The control unit 210 performs a periodic receiving operation using formula D1 (S2604).

[0434] -Variant 2

[0435] The terminal device 10 may be configured to switch the formula. Fig.29 As shown, the control unit 110 of the terminal device 10 determines whether the aforementioned fourth offset information is received from the base station device 20 (S2701). In the case of receiving the aforementioned fourth offset information (S2701 "Yes"), the control unit 110 selects formula D2 (S2702). The control unit 110 performs a periodic transmission operation using formula D2 (S2704). In contrast, in the case of not receiving the aforementioned fourth offset information (S2701 "No"), the control unit 110 selects formula D1 (S2703). The control unit 110 performs a periodic transmission operation using formula D1 (S2704).

[0436] According to the aforementioned configuration, the terminal device 10 is able to select an appropriate formula in accordance with the information from the base station device 20 .

[0437] (2) Second Aspect

[0438] 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 is equivalent to the aforementioned second value. SFN_offset_4 is equivalent to the remainder when the number of time slots included in one cycle of SFN is divided by the number of time slots included in the transmission period of the terminal device 10 (i.e., SRperiodicity).

[0439] [Number 17]

[0440] (n f ·N frame，μ s l ot +SFN_offset_4×n+nμ s，f -SR OFFSET )mod SR PERIODICITY =0

[0441] Where SFN_offset_4=(1024×N frame，μ slot)modulo SR PERIODICITY

[0442] n=n+1whenever SFN=0···(D3)

[0443] The control unit 210 of the base station device 20 calculates SFN_offset_4 based on SRperiodicity, which is a parameter of SR. The control unit 110 of the terminal device 10 calculates SFN_offset_4 based on periodicityAndOffset included in the SchedulingRequestResourceConfigIE of the RRC message. According to this configuration, in addition to the parameters of SR, the base station device 20 does not need to newly notify the terminal device 10 of SFN_offset_4. The signaling between the base station device 20 and the terminal device 10 can be reduced.

[0444] -Variant 1

[0445] The base station device 20 may send an indication information indicating the use of formula D3 to the terminal device 10 (which may also be information for selecting formula D3, which may be recorded as the seventh indication information below). The base station device 20 may send an RRC message including the aforementioned seventh indication information to the terminal device 10. For example, the base station device 20 may configure the aforementioned seventh indication information for the service cell and / or UL-BWP in which the parameters of the SR are configured. That is, the aforementioned seventh indication information may be configured for each of one or more cell groups. In addition, the aforementioned seventh indication information may be configured for each of one or more UL-BWPs. The aforementioned seventh indication information may be configured as a new element of the SchedulingRequestResourceConfig IE. That is, the base station device 20 may send an RRC message to the terminal device 10, which includes the aforementioned seventh indication information for a specific service cell and / or a specific UL-BWP. That is, the aforementioned seventh indication information may be configured for each of one or more service cells and / or each of one or more UL-BWPs (each of the service cells and / or UL-BWPs configured with the parameters of the SR). The aforementioned seventh indication information may also be configured as an IE configuration other than the SchedulingRequestResourceConfig IE. The base station device 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the aforementioned seventh indication information to the terminal device 10. The base station device 20 may send DCI including the aforementioned seventh indication information to the terminal device 10. That is, the base station device 20 may send the aforementioned seventh indication information for a specific service cell and / or a specific UL-BWP, and based on the seventh indication information, perform a reception operation of the PUCCH in the specific service cell and / or the specific UL-BWP. In addition, the terminal device 10 may receive the aforementioned seventh indication information for a specific service cell and / or a specific UL-BWP, and based on the seventh indication information, perform a transmission operation of the PUCCH in the specific service cell and / or the specific UL-BWP.

[0446] -Variant 2

[0447] The base station device 20 may be configured to switch the formula. The control unit 210 of the base station device 20 may select the formula according to the sending of the seventh indication information. Fig.30 As shown, when the seventh indication information is sent (S2801 "Yes"), the control unit 210 selects formula D3 (S2802). The control unit 210 performs a periodic receiving operation using formula D3 (S2804). In contrast, when the seventh indication information is not sent (S2801 "No"), the control unit 210 selects formula D1 (S2803). The control unit 210 performs a periodic receiving operation using formula D1 (S2804).

[0448] In addition, the control unit 210 of the base station device 20 can select one of Formula D1 and Formula D3 based on the value of SRperiodicity which is a parameter of SR. That is, the control unit 210 can select one of Formula D1 and Formula D3 based on the following condition: the number of time slots included in one cycle of SFN is not an integer multiple of the number of time slots as the transmission periodicity of the terminal device 10 (i.e., SRperiodicity). For example, when the aforementioned condition is met, the control unit 210 can select Formula D3. For example, when the aforementioned condition is not met, the control unit 210 can select Formula D1. In addition, the aforementioned condition may also be the following condition: the base station device 20 sends to the terminal device 10 configuration information (i.e., SRperiodicity) of the transmission period of the terminal device 10, in which the number of time slots included in one cycle of SFN is not an integer multiple of the number of time slots as the transmission period of the terminal device 10.

[0449] -Variant 3

[0450] The terminal device 10 may be configured to switch the formula. Fig.31 As shown, the control unit 110 of the terminal device 10 determines whether the following condition J1 is satisfied (S2901). The condition J1 corresponds to the use condition for determining whether to use the formula D3. The condition J1 is one of the following conditions j11 to j12 or a combination of two of them.

[0451] j11: The terminal device 10 receives configuration information of the transmission period of the terminal device 10 (ie, SRperiodicity) in which the number of time slots included in one cycle of SFN is not an integer multiple of the number of time slots as the transmission period of the terminal device 10 .

[0452] j12: The terminal device 10 receives the aforementioned seventh instruction information from the base station device 20.

[0453] When the condition J1 is satisfied (S2901 "Yes"), the control unit 110 selects the formula D3 (S2902). The control unit 110 performs a periodic transmission operation using the formula D3 (S2904). On the other hand, when the condition J1 is not satisfied (S2901 "No"), the control unit 110 selects the formula D1 (S2903). The control unit 110 performs a periodic transmission operation using the formula D1 (S2904).

[0454] According to the aforementioned configuration, the terminal device 10 is able to select an appropriate formula in accordance with the transmission cycle of the terminal device 10 and / or information from the base station device 20 .

[0455] (3) The third aspect

[0456] An example of a case where H-SFN is used (applied) is described. The control unit 110 of the terminal device 10 performs a periodic transmission operation using the following formula D4. The control unit 210 of the base station device 20 performs a periodic reception operation using the following formula D4.

[0457] [Number 18]

[0458] [(n f +H-SFN×1024)·N frame，μ slot +n μ s，f -SR OFFSET ]mod SR PERIODICITY =0···(D4)

[0459] -Variant 1

[0460] The base station device 20 may send an indication information indicating the use of formula D4 to the terminal device 10 (which may also be information for selecting formula D4, which may be recorded as the eighth indication information below). The base station device 20 may send an RRC message including the aforementioned eighth indication information to the terminal device 10. For example, the base station device 20 may configure the aforementioned eighth indication information for the service cell and / or UL-BWP in which the parameters of the SR are configured. That is, the aforementioned eighth indication information may be configured for each of one or more cell groups. In addition, the aforementioned eighth indication information may be configured for each of one or more UL-BWPs. The aforementioned eighth indication information may be configured as a new element of the SchedulingRequestResourceConfig IE. That is, the base station device 20 may send an RRC message to the terminal device 10, which includes the aforementioned eighth indication information for a specific service cell and / or a specific UL-BWP. That is, the aforementioned eighth indication information may be configured for each of one or more service cells and / or each of one or more UL-BWPs (each of the service cells and / or UL-BWPs configured with the parameters of the SR). The aforementioned eighth indication information may also be configured as an IE other than the SchedulingRequestResourceConfig IE. The base station device 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the aforementioned eighth indication information to the terminal device 10. The base station device 20 may send DCI including the aforementioned eighth indication information to the terminal device 10. That is, the base station device 20 may send the aforementioned eighth indication information for a specific service cell and / or a specific UL-BWP, and based on the eighth indication information, perform a reception operation of the PUCCH in the specific service cell and / or the specific UL-BWP. In addition, the terminal device 10 may receive the aforementioned eighth indication information for a specific service cell and / or a specific UL-BWP, and based on the eighth indication information, perform a transmission operation of the PUCCH in the specific service cell and / or the specific UL-BWP.

[0461] -Variant 2

[0462] The base station apparatus 20 may be configured to switch the formula. Fig.32 As shown, the control unit 210 of the base station device 20 determines whether the following condition J2 is satisfied (S3001). The condition J2 is equivalent to the 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 can be a combination of j21 and j23.

[0463] j21: The base station device 20 sends the aforementioned eighth indication information to the terminal device 10.

[0464] j22: The base station apparatus 20 transmits to the terminal apparatus 10 configuration information (ie, SRperiodicity) of the transmission period of the terminal apparatus 10 , in which the number of time slots included in one cycle of the SFN is not an integer multiple of the number of time slots as the transmission period of the terminal apparatus 10 .

[0465] j23: The base station device 20 transmits the information related to the H-SFN to the terminal device 10. The aforementioned information related to the H-SFN may be eDRX-Allowed and / or hyperSFN included in the system information (eg, SIB1).

[0466] When the condition J2 is satisfied (S3001 "Yes"), the control unit 210 selects the formula D4 (S3002). The control unit 210 performs a periodic receiving operation using the formula D4 (S3004). In contrast, when the condition J2 is not satisfied (S3001 "No"), the control unit 210 selects the formula D1 (S3003). The control unit 210 performs a periodic receiving operation using the formula D1 (S3004).

[0467] -Variant 3

[0468] The terminal device 10 may be configured to switch the formula. Fig.33 As shown, the control unit 110 of the terminal device 10 determines whether the following condition J3 is established (S3101). Condition J3 is equivalent to the use condition for determining whether to use formula D4. Condition J3 is a combination of one or more selected from the following conditions j31 to j33. For example, condition J3 can be a combination of j32 and j33.

[0469] j31: The terminal device 10 receives configuration information (ie, SRperiodicity) of the transmission period of the terminal device 10 from the base station device 20, indicating that the number of time slots included in one cycle of SFN is not an integer multiple of the number of time slots as the transmission period of the terminal device 10.

[0470] j32: The terminal device 10 receives the aforementioned eighth indication information from the base station device 20.

[0471] j33: The terminal device 10 receives information related to H-SFN from the base station device 20. The aforementioned information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (eg, SIB1).

[0472] When the condition J3 is satisfied (S3101 "Yes"), the control unit 110 selects the formula D4 (S3102). The control unit 110 performs a periodic transmission operation using the formula D4 (S3104). In contrast, when the condition J3 is not satisfied (S3101 "No"), the control unit 110 selects the formula D1 (S3103). The control unit 110 performs a periodic reception operation using the formula D1 (S3104).

[0473] According to the aforementioned configuration, the terminal device 10 is able to select an appropriate formula in accordance with the transmission cycle of the SR and / or the information from the base station device 20 .

[0474] 2.4.CG

[0475] In order to determine the sending timing in type 1 of CG, the following formula E1 can be used.

[0476] [Number 19]

[0477] [(SFN×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)+(slot number in the frame×numberOfSymbolsPerSlot)+symbolnumberintheslot]

[0478] =(timeReferenceSFN×numberOfSlotsPerFrame×numberOfSymbolsPerSlot+timeDomainOffset×numberOfSymbolsPerSlot+S+N×periodicity)modulo(1024×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)···(E1)

[0479] In addition, in order to determine the sending timing in type 2 of CG, the following formula F1 can be used.

[0480] [Number 20]

[0481] [(SFN×numberOfSIotsPerFrame×numberOfSymbolsPerSIot)+(slot number in the frame×numberOfSymbolsPerSIot)+symbol number in the slot]

[0482] =[(SFN start time×numberOfSIotsPerFrame×numberOfSymbolsPerSIot+slOt start time ×numberOfSymbolsPerSIot+symbol start time )+N×periodicity]modulo(1024×numberOfSIotsPerFrame×numberOfSymbolsPerSIot)···(F1)

[0483] The parameters in formula ElkT and F1 are as follows.

[0484] -numberOfSlotsPerFrame: The number of slots that make up one radio frame.

[0485] -numberOfSymbolsPerSlot: The number of symbols that make up one time slot.

[0486] -timeReferenceSFN' is a SFN used to determine the offset in the time domain, and is included in the ConfiguredGrantConfigIE.

[0487] -timeDomainOffset: is the offset related to the SFN determined by timeReferenceSFN, included in the ConfiguredGrantConfig IE.

[0488] -S: Start symbol determined by timeDomainAllocation included in ConfiguredGrantConfigIE.

[0489] -SFN start time : The SFN of the first transmission opportunity when the uplink allocation is initialized or reinitialized.

[0490] -S10t start×time : The time slot number of the first transmission opportunity when the uplink allocation is initialized or reinitialized.

[0491] -Symbol start time : The symbol number of the first transmission opportunity when the uplink allocation is initialized or reinitialized.

[0492] -periodicity: The transmission period of the uplink.

[0493] In addition, the parameter periodicity in the CG is equivalent to the transmission period of the terminal device 10, which is included in the ConfiguredGrantConfig IE as described above. In addition, the parameter periodicity is configured in units of the number of time slots or the number of symbols. Below, an example in which the parameter periodicity is configured in units of the number of symbols is described, but the "number of symbols" in the following description can be replaced by "number of time slots".

[0494] For example, the base station device 20 may send an RRC message to the terminal device 10, the RRC message including parameters related to the CG for a specific service cell (i.e., ConfiguredGrantConfig IE). That is, the parameters related to the CG (i.e., ConfiguredGrantConfig IE) may be configured for each of one or more service cells. In addition, the base station device 20 may send an RRC message to the terminal device 10, the RRC message including parameters related to the CG for a specific UL-BWP (i.e., ConfiguredGrantConfig IE). That is, the parameters related to the 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 the CG for each of the one or more UL-BWPs (i.e., ConfiguredGrantConfig IE).

[0495] The terminal device 10 allocates SFN, time slot number and symbol number satisfying formula E1 as resources for the Nth transmission in type 1 of CG. When the number of symbols included in one cycle of SFN is not an integer multiple of the number of symbols of the transmission period of the terminal device 10 (i.e., parameter periodicity), the transmission period changes at the time point when SFN is updated from 1023 to 0. Therefore, the problem of being unable to maintain a fixed transmission period arises. This problem also occurs in formula F1. The following describes aspects of solving this problem.

[0496] 2.4.1. Type 1

[0497] (1) First aspect

[0498] like Fig.34As shown, the control unit 210 of the base station device 20 sends 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 uses the following formula E2 to perform the periodic transmission operation of PUSCH (S3202). For example, the terminal device 10 can store the RRC message including CG parameters as a configured uplink grant. Here, the RRC message including CG parameters for scheduling PUSCH is also referred to as an uplink grant. In addition, the terminal device 10 may assume that after the uplink grant is configured for CG type 1, the Nth uplink grant occurs (repeatedly) in sequence at the SFN and / or time slot number that satisfies formula E2. That is, the terminal device 10 may assume that the stored uplink grants occur in sequence at the SFN and / or time slot number that satisfies formula E2 to perform the transmission of PUSCH. Similarly, the base station device 20 may assume that at the SFN and / or time slot number that satisfies formula E2, the uplink permissions stored in the terminal device 10 occur (repeat) in sequence to perform PUSCH reception. In the following, the terminal device 10 assumes that the stored uplink permissions occur (repeat) in sequence to perform PUSCH reception based on a specific formula, which is also recorded as a PUSCH transmission operation using the formula (referred to as a transmission operation). Here, the PUSCH transmission operation using the formula also includes the terminal device 10 simply performing PUSCH transmission. In addition, the base station device 20 assumes that the uplink permissions stored in the terminal device 10 occur (repeat) in sequence to perform PUSCH reception based on a specific formula, which is also recorded as a PUSCH reception operation using the formula (referred to as a reception operation). Here, the PUSCH reception operation using the formula also includes the base station device 20 simply performing PUSCH reception.

[0499] The control unit 210 of the base station device 20 performs a periodic reception operation using the following formula E2 (S3203). n corresponds to the aforementioned first value. sfnOffset_5 is a value for offsetting SFN, and corresponds to the aforementioned second value.

[0500] [Number 21]

[0501] {[(SFN+sfnOffset_5×n)×numberOfSlotsPerFrame×numberOfSymbolsPerSlot]+(slot number in the frame×numberOfSymbolsPerSlot)+symbol number in the slot}

[0502] =(timeReferenceSFN×numberOfSlotsPerFrame×numberOfSymbolsPerSlot+timeDomainOffset×numberOfSymbolsPerSlot+S+N×periodicity)modulo(1024×numberOfSlotsPerFrame×numberOfSymbolsPerSlot).

[0503] Wheren=n+1 whenever SFN=0···(E2)

[0504] According to the aforementioned 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 coordination with the transmission operation of the terminal device 10 .

[0505] The base station device 20 sends the offset information related to sfnOffset_5 to the terminal device 10. The offset information related to sfnOffset_5 is called "fifth offset information". The base station device 20 may send 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 the service cell and / or UL-BWP configured with the parameters of the CG. That is, the fifth offset information may be configured for each of one or more service cells. In addition, 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 the ConfiguredGrantConfig IE. That is, the base station device 20 may send an RRC message to the terminal device 10, which includes the fifth offset information for a specific service cell and / or a specific UL-BWP. That is, the fifth offset information may be configured for each of one or more service cells and / or each of one or more UL-BWPs (each of the service cells and / or UL-BWPs configured with the parameters of the SR). The fifth offset information may also be configured for an IE other than the ConfiguredGrantConfig IE. The base station device 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the aforementioned fifth offset information to the terminal device 10. The base station device 20 may send DCI including the aforementioned fifth offset information to the terminal device 10. That is, the base station device 20 may send the aforementioned fifth offset information for a specific service cell and / or a specific UL-BWP, and based on the fifth offset information, perform a reception operation of the PUSCH in the specific service cell and / or the specific UL-BWP. In addition, the terminal device 10 may receive the aforementioned fifth offset information for a specific service cell and / or a specific UL-BWP, and based on the fifth offset information, perform a transmission operation of the PUSCH in the specific service cell and / or the specific UL-BWP.

[0506] -Variant 1

[0507] The base station device 20 may be configured to switch the formula. The control unit 210 of the base station device 20 may select the formula according to the transmission of the fifth offset information. Fig.35 As shown, when the fifth offset information is sent (S3301 "Yes"), the control unit 210 selects formula E2 (S3302). The control unit 210 performs a periodic reception operation using formula E2 (S3304). In contrast, when the fifth offset information is not sent (S3301 "No"), the control unit 210 selects formula E1 (S3303). The control unit 210 performs a periodic reception operation using formula E1 (S3304).

[0508] -Variant 2

[0509] The terminal device 10 may be configured to switch the formula. Fig.36 As shown, the control unit 110 of the terminal device 10 determines whether the aforementioned fifth offset information is received from the base station device 20 (S3401). In the case of receiving the aforementioned fifth offset information (S3401 "Yes"), the control unit 110 selects formula E2 (S3402). The control unit 110 performs a periodic transmission operation using formula E2 (S3404). In contrast, the control unit 110 selects formula E1 (S3403) when the aforementioned fifth offset information is not received (S3401 "No"). The control unit 110 performs a periodic transmission operation using formula E1 (S3404).

[0510] According to the aforementioned configuration, the terminal device 10 is able to select an appropriate formula in accordance with the information from the base station device 20 .

[0511] (2) Second Aspect

[0512] The control unit 110 of the terminal device 10 performs a periodic transmission operation using the following formula E3. The control unit 210 of the base station device 20 performs a periodic reception operation using the following formula E3. SFN_offset_5 is equivalent to the aforementioned second value. SFN_offset_5 is equivalent to the remainder when the number of symbols included in one cycle of SFN is divided by the number of symbols included in the transmission cycle of the terminal device 10.

[0513] [Number 22]

[0514] [(SFN×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)+(slot number in the frame×numberOfSymbolsPerSlot)+symbol number in the slot]+SFN_offset_5×n

[0515] =(timeReferenceSFN×numberOfSlotsPerFrame×numberOfSymbolsPerSlot+timeDomainOffset×numberOfSymbolsPerSlot+S+N×periodicity)modulo(1024×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)

[0516] Where SFN_offset_5=(1024×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)moduloperiodicityand n=n+1whenever SFN=0···(E3)

[0517] The control unit 210 of the base station device 20 calculates SFN_offset_5 based on periodicity, which is a parameter of the CG. The control unit 110 of the terminal device 10 calculates SFN_offset_5 based on the parameter periodicity included in the ConfiguredGrantConfig 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_5 in addition to the parameters of the CG. The signaling between the base station device 20 and the terminal device 10 can be reduced.

[0518] -Variant 1

[0519] The control unit 210 of the base station device 20 may send an indication information indicating the use of formula E3 to the terminal device 10 (which may also be information for selecting formula E3, which may be recorded as the ninth indication information below). The control unit 210 may send an RRC message including the aforementioned ninth indication information to the terminal device 10. For example, the base station device 20 may configure the aforementioned ninth indication information for the service cell and / or UL-BWP in which the parameters of the CG are configured. That is, the aforementioned ninth indication information may be configured for each of one or more cell groups. In addition, the aforementioned ninth indication information may be configured for each of one or more UL-BWPs. The aforementioned ninth indication information may be configured as a new element of the ConfiguredGrantConfig IE. That is, the base station device 20 may send an RRC message to the terminal device 10, which includes the aforementioned ninth indication information for a specific service cell and / or a specific UL-BWP. That is, the aforementioned ninth indication information may be configured for each of one or more service cells and / or each of one or more UL-BWPs (each of the service cells and / or UL-BWPs configured with the parameters of the SR). The aforementioned ninth indication information may also be configured for an IE other than the ConfiguredGrantConfig IE. The base station device 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the aforementioned ninth indication information to the terminal device 10. The base station device 20 may send DCI including the aforementioned ninth indication information to the terminal device 10. That is, the base station device 20 may send the aforementioned ninth indication information for a specific service cell and / or a specific UL-BWP, and based on the ninth indication information, perform a reception operation of the PUSCH in the specific service cell and / or the specific UL-BWP. In addition, the terminal device 10 may receive the aforementioned ninth indication information for a specific service cell and / or a specific UL-BWP, and based on the ninth indication information, perform a transmission operation of the PUSCH in the specific service cell and / or the specific UL-BWP.

[0520] -Variant 2

[0521] The base station device 20 may be configured to switch the formula. The control unit 210 of the base station device 20 may select the formula according to the sending of the ninth indication information. Fig.37 As shown, when the aforementioned ninth indication information is sent (S3501 "Yes"), the control unit 210 selects formula E3 (S3502). The control unit 210 performs a periodic receiving operation using formula E3 (S3504). In contrast, when the aforementioned ninth indication information is not sent (S3501 "No"), the control unit 210 selects formula E1 (S3503). The control unit 210 performs a periodic receiving operation using formula E1 (S3504).

[0522] In addition, the control unit 210 of the base station device 20 can select one of Formula E1 and Formula E3 based on the parameter periodicity of CG. That is, the control unit 210 can select one of Formula E1 and Formula E3 based on the following condition: the number of symbols included in one cycle of SFN is not an integer multiple of the number of symbols (i.e., periodicity) as the transmission period of the terminal device 10. For example, when the aforementioned condition is met, the control unit 210 can select Formula E3. For example, when the aforementioned condition is not met, the control unit 210 can select Formula E1. In addition, the aforementioned condition may also be the following condition: the base station device 20 sends to the terminal device 10 the configuration information of the transmission period of the terminal device 10 (i.e., parameter periodicity), in which the number of symbols included in one cycle of SFN is not an integer multiple of the number of symbols as the transmission period of the terminal device 10.

[0523] -Variant 3

[0524] The terminal device 10 may be configured to switch the formula. Fig.38 As shown, the control unit 110 of the terminal device 10 determines whether the following condition K1 is satisfied (S3601). The condition K1 corresponds to the use condition for determining whether to use the formula E3. The condition K1 is one of the following conditions k11 to k12 or a combination of two of them.

[0525] k11: The terminal device 10 receives configuration information (ie, parameter periodicity) of the transmission period of the terminal device 10 , indicating that the number of symbols included in one cycle of SFN is not an integral multiple of the number of symbols of the transmission period of the terminal device 10 .

[0526] k12: The terminal device 10 receives the ninth instruction information from the base station device 20 .

[0527] When condition K1 is satisfied (S3601 "Yes"), the control unit 110 selects formula E3 (S3602). The control unit 110 performs a periodic transmission operation using formula E3 (S3604). In contrast, when condition K1 is not satisfied (S3601 "No"), the control unit 110 selects formula E1 (S3603). The control unit 110 performs a periodic transmission operation using formula E1 (S3604).

[0528] According to the aforementioned configuration, the terminal device 10 is able to select an appropriate formula in accordance with the transmission cycle of the terminal device 10 and / or information from the base station device 20 .

[0529] (3) The third aspect

[0530] An example of using (applying) H-SFN will be described. The control unit 110 of the terminal device 10 performs a periodic transmission operation using the following formula E4. The control unit 210 of the base station device 20 performs a periodic reception operation using the following formula E4.

[0531] [Number 23]

[0532] {[(SFN+H-SFN×1024)×numberOfSlotsPerFrame×numberOfSymbolsPerSlot]+(slot number in the frame×numberOfSymbolsPerSlot)+symbol number in the slot}

[0533] =(timeReferenceSFN×numberOfSlotsPerFrame×numberOfSymbolsPerSlot+timeDomainOffset×numberOfSymbolsPerSlot+S+N×periodicity)modulo(1024×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)···(E4)

[0534] -Variant 1

[0535] The base station device 20 may send an indication information indicating the use of formula E4 to the terminal device 10 (which may also be information for selecting formula E4, which may be recorded as the tenth indication information below). The base station device 20 may send an RRC message including the aforementioned tenth indication information to the terminal device 10. For example, the base station device 20 may configure the aforementioned tenth indication information for the service cell and / or UL-BWP in which the parameters of the CG are configured. That is, the aforementioned tenth indication information may be configured for each of one or more cell groups. In addition, the aforementioned tenth indication information may be configured for each of one or more UL-BWPs. The aforementioned tenth indication information may be configured as a new element of the ConfiguredGrantConfig IE. That is, the base station device 20 may send an RRC message to the terminal device 10, which includes the aforementioned tenth indication information for a specific service cell and / or a specific UL-BWP. That is, the aforementioned tenth indication information may be configured for each of one or more service cells and / or each of one or more UL-BWPs (each of the service cells and / or UL-BWPs configured with the parameters of the SR). The aforementioned tenth indication information may also be configured as an IE other than the ConfiguredGrantConfig IE. The base station device 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the aforementioned tenth indication information to the terminal device 10. The base station device 20 may send DCI including the aforementioned tenth indication information to the terminal device 10. That is, the base station device 20 may send the aforementioned tenth indication information for a specific service cell and / or a specific UL-BWP, and based on the tenth indication information, perform a reception operation of the PUSCH in the specific service cell and / or the specific UL-BWP. In addition, the terminal device 10 may receive the aforementioned tenth indication information for a specific service cell and / or a specific UL-BWP, and based on the tenth indication information, perform a transmission operation of the PUSCH in the specific service cell and / or the specific UL-BWP.

[0536] -Variant 2

[0537] The base station apparatus 20 may be configured to switch the formula. Fig.39 As shown, the control unit 210 of the base station device 20 determines whether the following condition K2 is satisfied (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.

[0538] k21: The base station device 20 transmits the aforementioned tenth instruction information to the terminal device 10 .

[0539] k22: The base station apparatus 20 transmits to the terminal apparatus 10 configuration information (ie, parameter periodicity) of the transmission period of the terminal apparatus 10 in which the number of symbols included in one cycle of SFN is not an integral multiple of the number of symbols of the transmission period of the terminal apparatus 10 .

[0540] k23: The base station device 20 transmits the information related to H-SFN to the terminal device 10. The aforementioned information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in the system information (eg, SIB1).

[0541] When condition K2 is satisfied (S3701 "Yes"), control unit 210 selects formula E4 (S3702). Control unit 210 performs a periodic receiving operation using formula E4 (S3704). In contrast, when condition K2 is not satisfied (S3701 "No"), control unit 210 selects formula E1 (S3703). Control unit 210 performs a periodic receiving operation using formula E1 (S3704).

[0542] -Variant 3

[0543] The terminal device 10 may be configured to switch the formula. Fig.40 As shown, the control unit 110 of the terminal device 10 determines whether the following condition K3 is established (S3801). Condition K3 is equivalent to the use condition for determining whether to use formula E4. Condition K3 is a combination of one or more selected from the following conditions k31 to k33. For example, condition K3 can be a combination of k32 and k33.

[0544] k31: The terminal device 10 receives configuration information (ie, parameter periodicity) of the transmission period of the terminal device 10 from the base station device 20 , indicating that the number of symbols included in one cycle of SFN is not an integer multiple of the number of symbols of the transmission period of the terminal device 10 .

[0545] k32: The terminal device 10 receives the aforementioned tenth instruction information from the base station device 20 .

[0546] k33: The terminal device 10 receives information related to H-SFN from the base station device 20. The aforementioned information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (eg, SIB1).

[0547] When condition K3 is satisfied (S3801 "Yes"), the control unit 110 selects formula E4 (S3802). The control unit 110 performs a periodic sending operation using formula E4 (S3804). In contrast, when condition K3 is not satisfied (S3801 "No"), the control unit 110 selects formula E1 (S3803). The control unit 110 performs a periodic receiving operation using formula E1 (S3804).

[0548] According to the aforementioned configuration, the terminal device 10 is able to select an appropriate formula in accordance with the transmission cycle of the terminal device 10 and / or information from the base station device 20 .

[0549] 2.4.2. Type 2

[0550] (1) First aspect

[0551] like Fig.41 As shown, the control unit 210 of the base station device 20 sends an RRC message including parameters of the CG to the terminal device 10 via the communication unit 220 (S3901). The control unit 210 sends a DCI encrypted with the CS-RNTI to the terminal device 10 via the communication unit 220 (S3902). As a result, the periodic transmission operation of the terminal device 10 using the PUSCH is activated.

[0552] The control unit 110 of the terminal device 100 uses the following formula F2 to perform a periodic transmission operation (S3903). For example, when a DCI (i.e., a DCI for scheduling PUSCH) to which a CRC encrypted with CS-RNTI is added indicates the activation of a CG (i.e., when a PDCCH indicates the activation of a CG), the terminal device 10 may store (store) the DCI as a configured uplink grant. Here, the DCI (DCI format) for scheduling PUSCH is also referred to as an uplink grant. In addition, the terminal device 10 may assume that after the uplink grant is configured for CG type 2, the Nth uplink grant occurs (repeatedly) in sequence at the SFN and / or time slot number that satisfies formula F2. That is, the terminal device 10 may assume that the stored uplink grants occur in sequence at the SFN and / or time slot number that satisfies formula F2 to perform a PUSCH transmission operation. Likewise, the base station apparatus 20 may perform a PUSCH reception operation by assuming that the uplink grants stored in the terminal apparatus 10 occur (repeat) in sequence at the SFN and / or time slot number satisfying Formula F2.

[0553] The control unit 210 of the base station device 20 performs a periodic reception operation using the following formula F2 (S3904). n corresponds to the aforementioned first value. sfnOffset_6 is a value for offsetting SFN, and corresponds to the aforementioned second value.

[0554] [Number 24]

[0555] {[(SFN+sfnOffset_6×n)×numberOfSlotsPerFrame×numberOfSymbolsPerSlot]+(slot number in the frame×numberOfSymbolsPerSlot)+symbol number in the slot}

[0556] =[(SFN start time ×numberOfSlotsPerFrame×numberOfSymbolsPerSlot+slot start time ×numberOfSymbolsPerSlot+symbol start time )+N×periodicity]

[0557] modulo(1024×numberOfSlotsPerFrame×numberOfSymbolsPerSlot).Where n=n+1whenever SFN=0···(F2)

[0558] According to the aforementioned 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 coordination with the transmission operation of the terminal device 10 .

[0559] The base station device 20 sends the offset information related to sfnOffset_6 to the terminal device 10. The offset information related to sfnOffset_6 is referred to as the "sixth offset information". The base station device 20 may send an RRC message including the aforementioned sixth offset information to the terminal device 10. For example, the base station device 20 may configure the aforementioned sixth offset information for the service cell and / or UL-BWP in which the parameters of the CG are configured. That is, the aforementioned sixth offset information may be configured for each of one or more service cells. In addition, the aforementioned sixth offset information may be configured for each of one or more UL-BWPs. The aforementioned sixth offset information may be configured as a new element of the ConfiguredGrantConfig IE. That is, the base station device 20 may send an RRC message to the terminal device 10, which includes the aforementioned sixth offset information for a specific service cell and / or a specific UL-BWP. That is, the aforementioned sixth offset information may be configured for each of one or more service cells and / or each of one or more UL-BWPs (each of the service cells and / or UL-BWPs configured with the parameters of the SR). The aforementioned sixth offset information may also be configured for an IE other than the ConfiguredGrantConfig IE. The base station device 20 may send system information (SI, such as SIB 1 and / or SIBs other than SIB 1) including the aforementioned sixth offset information to the terminal device 10. The base station device 20 may send DCI including the aforementioned sixth offset information to the terminal device 10. That is, the base station device 20 may send the aforementioned sixth offset information for a specific service cell and / or a specific UL-BWP, and perform a reception operation of the PUSCH in the specific service cell and / or the specific UL-BWP based on the sixth offset information. In addition, the terminal device 10 may receive the aforementioned sixth offset information for a specific service cell and / or a specific UL-BWP, and perform a transmission operation of the PUSCH in the specific service cell and / or the specific UL-BWP based on the sixth offset information.

[0560] -Variant 1

[0561] The base station device 20 may be configured to switch the formula. The control unit 210 of the base station device 20 may select the formula according to the transmission of the sixth offset information. Fig.42 As shown, when the sixth offset information is sent (S4001 "Yes"), the control unit 210 selects formula F2 (S4002). The control unit 210 performs a periodic receiving operation using formula F2 (S4004). In contrast, when the sixth offset information is not sent (S4001 "No"), the control unit 210 selects formula F1 (S4003). The control unit 210 performs a periodic receiving operation using formula F1 (S4004).

[0562] -Variant 2

[0563] The terminal device 10 may be configured to switch the formula. Fig.43 As shown, the control unit 110 of the terminal device 10 determines whether the aforementioned sixth offset information is received from the base station device 20 (S4101). In the case of receiving the aforementioned sixth offset information (S4101 "Yes"), the control unit 110 selects formula F2 (S4102). The control unit 110 performs a periodic transmission operation using formula F2 (S4104). In contrast, in the case of not receiving the aforementioned sixth offset information (S4101 "No"), the control unit 110 selects formula F1 (S4103). The control unit 110 performs a periodic transmission operation using formula F1 (S4104).

[0564] According to the aforementioned configuration, the terminal device 10 is able to select an appropriate formula in accordance with the information from the base station device 20 .

[0565] (2) Second Aspect

[0566] 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 is equivalent to the aforementioned second value. SFN_offset_6 is equivalent to the remainder when the number of symbols included in one cycle of SFN is divided by the number of symbols included in the transmission cycle of the terminal device 10.

[0567] [Number 25]

[0568] [(SFN×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)+(slot number in the frame×numberOfSymbolsPerSlot)+symbol number in the slot]+SFN_offset 6×n

[0569] =[(SFN start time ×numberOfSlotsPerFrame×numberOfSymbolsPerSlot+slot start time ×numberOfSymbolsPerSlot+symbol start time )+N×periodicity]

[0570] modulo(1024×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)Where SFN-offset-6=(1024×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)moduloperiodicityand n=n+1 whenever SFN=0···(F3)

[0571] The control unit 210 of the base station device 20 calculates SFN_offset_6 based on the periodicity which is a parameter of the CG. 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. According to 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 parameters of the CG. The signaling between the base station device 20 and the terminal device 10 can be reduced.

[0572] -Variant 1

[0573] The base station device 20 may send an indication information indicating the use of formula F3 to the terminal device 10 (which may also be information for selecting formula F3, which may be recorded as the eleventh indication information below). The control unit 210 may send an RRC message including the aforementioned eleventh indication information to the terminal device 10. For example, the base station device 20 may configure the aforementioned eleventh indication information for the service cell and / or UL-BWP in which the parameters of the CG are configured. That is, the aforementioned eleventh indication information may be configured for each of one or more cell groups. In addition, the aforementioned eleventh indication information may be configured for each of one or more UL-BWPs. The aforementioned eleventh indication information may be configured as a new element of the ConfiguredGrantConfig IE. That is, the base station device 20 may send an RRC message to the terminal device 10, which includes the aforementioned eleventh indication information for a specific service cell and / or a specific UL-BWP. That is, the aforementioned eleventh indication information may be configured for each of one or more service cells and / or each of one or more UL-BWPs (each of the service cells and / or UL-BWPs configured with the parameters of the SR). The aforementioned eleventh indication information may also be an IE configuration other than the ConfiguredGrantConfig IE. The base station device 20 may send system information (SI, such as SIB 1 and / or SIBs other than SIB1) including the aforementioned eleventh indication information to the terminal device 10. The base station device 20 may send a DCI including the aforementioned eleventh indication information to the terminal device 10. That is, the base station device 20 may send the aforementioned eleventh indication information for a specific service cell and / or a specific UL-BWP, and based on the eleventh indication information, perform a receiving operation of the PUSCH in the specific service cell and / or the specific UL-BWP. In addition, the terminal device 10 may receive the aforementioned eleventh indication information for a specific service cell and / or a specific UL-BWP, and based on the eleventh indication information, perform a sending operation of the PUSCH in the specific service cell and / or the specific UL-BWP.

[0574] -Variant 2

[0575] The base station device 20 may be configured to switch the formula. The control unit 210 of the base station device 20 may select the formula according to the transmission of the eleventh indication information. Fig.44 As shown, when the aforementioned eleventh indication information is sent (S4201 "Yes"), the control unit 210 selects formula F3 (S4202). The control unit 210 performs a periodic receiving operation using formula F3 (S4204). In contrast, when the aforementioned eleventh indication information is not sent (S4201 "No"), the control unit 210 selects formula F1 (S4203). The control unit 210 performs a periodic receiving operation using formula F1 (S4204).

[0576] In addition, the control unit 210 of the base station device 20 can select one of Formula F1 and Formula F3 based on the periodicity that is a parameter of the CG. That is, the control unit 210 can select one of Formula F1 and Formula F3 based on the following condition: the number of symbols included in one cycle of the SFN is not an integer multiple of the number of symbols (i.e., periodicity) that is the transmission period of the terminal device 10. For example, when the aforementioned condition is met, the control unit 210 can select Formula F3. For example, when the aforementioned condition is not met, the control unit 210 can select Formula F1. In addition, the aforementioned condition may also be the following condition: the base station device 20 sends to the terminal device 10 configuration information (i.e., 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.

[0577] -Variant 3

[0578] The terminal device 10 may be configured to switch the formula. Fig.45 As shown, the control unit 110 of the terminal device 10 determines whether the following condition K4 is satisfied (S4301). The condition K4 corresponds to the use condition for determining whether to use the formula F3. The condition K4 is one of the following conditions k41 to k42 or a combination of two of them.

[0579] k41: The terminal device 10 receives configuration information (ie, parameter periodicity) of the transmission period of the terminal device 10 , indicating that the number of symbols included in one cycle of SFN is not an integer multiple of the number of symbols of the transmission period of the terminal device 10 .

[0580] k42: The terminal device 10 receives the eleventh indication information from the base station device 20 .

[0581] When condition K4 is satisfied (S4301 "Yes"), the control unit 110 selects formula F3 (S4302). The control unit 110 performs a periodic transmission operation using formula F3 (S4304). On the other hand, when condition K4 is not satisfied (S4301 "No"), the control unit 110 selects formula F1 (S4303). The control unit 110 performs a periodic transmission operation using formula F1 (S4304).

[0582] According to the aforementioned configuration, the terminal device 10 is able to select an appropriate formula in accordance with the transmission cycle of the terminal device 10 and / or information from the base station device 20 .

[0583] (3) The third aspect

[0584] An example of using (applying) H-SFN 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.

[0585] [Number 26]

[0586] {[(SFN+H-SFN×1024)×numberOfSlotsPerFrame×numberOfSymbolsPerSlot]+(slot number in the frame ×numberOfSymbolsPerSlot)+symbol number in the slot}

[0587] =[(SFN starttime ×numberOfSlotsPerFrame×numberOfSymbolsPerSlot+slot start time ×numberOfSymbolsPerSlot+symbol start time )+N×periodicity]modulo(1024×numberOfSlotsPerFrame×numberOfSymbolsPerSlot)···(F4)

[0588] -Variant 1

[0589] The base station device 20 may send an indication information indicating the use of formula F4 to the terminal device 10 (which may also be information for selecting formula F4, which may be recorded as the twelfth indication information below). The base station device 20 may send an RRC message including the aforementioned twelfth indication information to the terminal device 10. For example, the base station device 20 may configure the aforementioned twelfth indication information for the service cell and / or UL-BWP configured with the parameters of the CG. That is, the aforementioned twelfth indication information may be configured for each of one or more cell groups. In addition, the aforementioned twelfth indication information may be configured for each of one or more UL-BWPs. The aforementioned twelfth indication information may be configured as a new element of the ConfiguredGrantConfig IE. That is, the base station device 20 may send an RRC message to the terminal device 10, which includes the aforementioned twelfth indication information for a specific service cell and / or a specific UL-BWP. That is, the aforementioned twelfth indication information may be configured for each of one or more service cells and / or each of one or more UL-BWPs (each of the service cells and / or UL-BWPs configured with the parameters of the SR). The aforementioned twelfth indication information may also be an IE configuration other than the ConfiguredGrantConfig IE. The base station device 20 may send system information (SI, such as SIB1 and / or SIBs other than SIB1) including the aforementioned twelfth indication information to the terminal device 10. The base station device 20 may send a DCI including the aforementioned twelfth indication information to the terminal device 10. That is, the base station device 20 may send the aforementioned twelfth indication information for a specific service cell and / or a specific UL-BWP, and based on the twelfth indication information, perform a receiving operation of the PUSCH in the specific service cell and / or the specific UL-BWP. In addition, the terminal device 10 may receive the aforementioned twelfth indication information for a specific service cell and / or a specific UL-BWP, and based on the twelfth indication information, perform a sending operation of the PUSCH in the specific service cell and / or the specific UL-BWP.

[0590] -Variant 2

[0591] The base station apparatus 20 may be configured to switch the formula. Fig.46 As shown, the control unit 210 of the base station device 20 determines whether the following condition K5 is satisfied (S4401). The condition K5 is equivalent to the use condition for determining whether to use the formula F4. The condition K5 is one or a combination of two or more selected from the following conditions k51 to k53. For example, the condition K5 can be a combination of k51 and k53.

[0592] k51: The base station device 20 transmits the aforementioned twelfth indication information to the terminal device 10 .

[0593] k52: The base station apparatus 20 transmits to the terminal apparatus 10 configuration information (ie, parameter periodicity) of the transmission period of the terminal apparatus 10 in which the number of symbols included in one cycle of SFN is not an integer multiple of the number of symbols of the transmission period of the terminal apparatus 10 .

[0594] k53: The base station device 20 transmits the information related to H-SFN to the terminal device 10. The aforementioned information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in the system information (eg, SIB1).

[0595] When condition K5 is satisfied (S4401 "Yes"), control unit 210 selects formula F4 (S4402). Control unit 210 performs a periodic receiving operation using formula F4 (S4404). In contrast, when condition K5 is not satisfied (S4401 "No"), control unit 210 selects formula F1 (S4403). Control unit 210 performs a periodic receiving operation using formula F1 (S4404).

[0596] -Variant 3

[0597] The terminal device 10 may be configured to switch the formula. Fig.47 As shown, the control unit 110 of the terminal device 10 determines whether the following condition K6 is established (S4501). Condition K6 is equivalent to the use condition for determining whether to use formula F4. Condition K6 is a combination of one or more selected from the following conditions k61 to k63. For example, condition K6 can be a combination of k62 and k63.

[0598] k61: The terminal device 10 receives configuration information (ie, parameter periodicity) of the transmission period of the terminal device 10 from the base station device 20 , indicating that the number of symbols included in one cycle of SFN is not an integer multiple of the number of symbols of the transmission period of the terminal device 10 .

[0599] k62: The terminal device 10 receives the aforementioned twelfth indication information from the base station device 20.

[0600] k63: The terminal device 10 receives information related to H-SFN from the base station device 20. The aforementioned information related to H-SFN may be eDRX-Allowed and / or hyperSFN included in system information (eg, SIB1).

[0601] When condition K6 is satisfied (S4501 "Yes"), control unit 110 selects formula F4 (S4502). Control unit 110 performs a periodic transmission operation using formula F4 (S4504). On the other hand, when condition K6 is not satisfied (S4501 "No"), control unit 110 selects formula F1 (S4503). Control unit 110 performs a periodic transmission operation using formula F1 (S4504).

[0602] According to the aforementioned configuration, the terminal device 10 is able to select an appropriate formula in accordance with the cycle of the terminal device 10 and / or information from the base station device 20 .

[0603] 3. Modifications

[0604] It should be understood that, although the present disclosure is described according to the above-mentioned embodiments, the present disclosure is not limited to the embodiments or configurations. The present disclosure also includes various modifications and variations within the equivalent scope. Other combinations of one or more elements included in the above-mentioned embodiments are also within the scope or thought of the present disclosure.

[0605] Throughout the present specification, the aforementioned "indication information indicating the use of a formula" may be interpreted as "indication information indicating whether to use a formula". "Indication information indicating whether to use a formula" is a concept including "information indicating the use of a formula" and "information indicating not to use a formula". The terminal device 10 and the base station device 20 may perform the various operations described above according to the indication information indicating whether to use a formula.

[0606] The expressions of words, phrases, etc. used in the above embodiments are only exemplary and can be replaced by substantially the same or similar expressions. In particular, since the technologies involved in the above embodiments are related to technical specifications, the expressions in the above embodiments can be replaced by substantially the same or similar expressions in technical specifications (for example, technical specifications cited in the specification of this application).

[0607] The information sent and received in the above-mentioned embodiments may be included in the same or different messages or the same or different elements already recorded in the technical specifications and sent and received, or may be included in a newly specified message or element and sent and received. The information sent and received in the above-mentioned embodiments may be sent and received using a layer and / or a different channel than the above-mentioned embodiments.

[0608] The manner and / or function provided by the device described in the above embodiments can be provided by software recorded in a tangible memory device and a computer executing the software, only by software, only by hardware, or by a combination thereof. For example, in the case where any of the above devices is provided by an electronic circuit as hardware, it can be provided by a digital circuit or an analog circuit including a plurality of logic circuits.

[0609] The apparatus described in the above embodiment executes a program stored in a non-transitorytangible storage medium, and executes a method corresponding to the program by executing the program.

[0610] 4. Notes

[0611] Part or all of the above-mentioned embodiments and variants may also be recorded as the following notes, but are not limited to the contents of the following notes. Below, a statement that is subordinate to multiple notes is described as being subordinate to a note that is subordinate to multiple notes. The subordinate relationship of all notes described below is included in the above-mentioned embodiments.

[0612] (Note 1)

[0613] A terminal device, comprising:

[0614] a control unit (110); and

[0615] The communication unit (120) is configured to perform wireless communication by being controlled by the control unit.

[0616] The control unit is configured to start a discontinuous reception (DRX) cycle using a formula including a correction value for a system frame number (SFN).

[0617] (Note 2)

[0618] According to the terminal device described in Supplementary Note 1, 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.

[0619] (Note 3)

[0620] According to the terminal device described in Supplementary Note 2, the correction value is a value that increases as the number of times the SFN is updated from the maximum value to the initial value increases.

[0621] (Note 4)

[0622] According to the terminal device described in Supplementary Note 3, 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.

[0623] (Note 5)

[0624] According to the terminal device described in Supplementary Note 4, the control unit is further configured to: receive information related to the second value from the base station device via the communication unit.

[0625] (Note 6)

[0626] According to the terminal device described in Note 5, the control unit is further configured to: upon receiving the information related to the second value, start the cycle of the DRX using the formula.

[0627] (Note 7)

[0628] According to the terminal device described in Supplement 6, the above formula is the first formula,

[0629] The control unit is further configured to: start the DRX cycle using a second formula that does not include the correction value,

[0630] The control unit is configured to: in the case where the information related to the second value is not received, start the cycle of the DRX using the second formula.

[0631] (Note 8)

[0632] According to the terminal device described in Supplementary Note 4, the control unit is further configured to: calculate a remainder when a time length of one cycle of the SFN is divided by a time length of the cycle of the DRX as the second value.

[0633] (Note 9)

[0634] According to the terminal device described in Supplementary Note 8, the control unit is further configured to: when a use condition related to the formula is satisfied, use the formula to start the DRX cycle;

[0635] The aforementioned conditions of use are one or a combination of two or more selected from the following conditions:

[0636] The condition that the time length of one cycle of the aforementioned SFN is not an integer multiple of the time length of the aforementioned cycle of the aforementioned DRX;

[0637] The condition that the time length of the aforementioned cycle of the aforementioned DRX is a non-integer value; and

[0638] The control unit receives a condition that information instructing to use the formula from the base station apparatus.

[0639] (Note 10)

[0640] According to the terminal device described in Supplementary Note 9, the above formula is the first formula,

[0641] The control unit is further configured to: start the DRX cycle using a second formula that does not include the correction value,

[0642] The control unit is configured to: when the use condition is not satisfied, use the second formula to start the DRX cycle.

[0643] (Note 11)

[0644] According to the terminal device described in Note 2 or 3, the control unit is further configured to calculate the correction value using Hyper SFN (H-SFN: hyper system frame number) and a value equivalent to the number of SFNs included in one cycle of the H-SFN.

[0645] (Note 12)

[0646] According to the terminal device described in Supplementary Note 11, the control unit is further configured to: when a use condition related to the formula is satisfied, use the formula to start the DRX cycle;

[0647] The aforementioned conditions of use are one or a combination of two or more selected from the following conditions:

[0648] The condition that the time length of one cycle of the aforementioned SFN is not an integer multiple of the time length of the aforementioned cycle of the aforementioned DRX;

[0649] The condition that the aforementioned time length of the aforementioned cycle of the aforementioned DRX is a non-integer value;

[0650] A condition that the control unit receives information instructing to use the above formula from a base station device; and

[0651] The control unit receives the condition that the information related to the H-SFN is received from the base station apparatus.

[0652] (Note 13)

[0653] According to the terminal device described in Supplementary Note 12, the above formula is the first formula,

[0654] The control unit is further configured to: start the DRX cycle using a second formula that does not include the correction value,

[0655] The control unit is configured to: when the use condition is not satisfied, use the second formula to start the DRX cycle.

[0656] (Note 14)

[0657] A method of a terminal device (10), comprising:

[0658] Determine whether a formula is established, the aforementioned formula includes a correction value for a system frame number (SFN); and

[0659] When the above formula holds true, the on-period of discontinuous reception (DRX) starts.

[0660] (Note 15)

[0661] A program causes a terminal device (10) to execute:

[0662] Determine whether a formula is established, the aforementioned formula includes a correction value for a system frame number (SFN); and

[0663] When the above formula holds true, the on-period of discontinuous reception (DRX) starts.

[0664] (Note 16)

[0665] A non-transitory physical recording medium having a program recorded thereon, wherein the program causes a terminal device (10) to execute:

[0666] Determine whether a formula is established, the aforementioned formula includes a correction value for a system frame number (SFN); and

[0667] When the above formula is established, the on-duration of discontinuous reception (DRX) starts.

[0668] (Note 17)

[0669] A base station device (20), comprising:

[0670] a control unit (210); and

[0671] The communication unit (220) is configured to perform wireless communication by being controlled by the control unit.

[0672] The control unit is configured to: send information related to a formula to the terminal device via the communication unit, the formula being used to determine the start of a discontinuous reception (DRX) cycle and including a correction value for a system frame number (SFN).

[0673] (Note 18)

[0674] According to the base station device described in Supplementary Note 17, the above-mentioned information is offset information used to offset the above-mentioned SFN in the above-mentioned formula.

[0675] (Note 19)

[0676] According to the base station device described in Supplementary Note 17, the information is instruction information for instructing the use of the formula for the terminal device.

[0677] (Note 20)

[0678] The base station device according to any one of Supplementary Notes 17 to 19,

[0679] The above formula is the first formula,

[0680] The control unit is configured to: use the first formula and the second formula not including the correction value,

[0681] The aforementioned control unit is configured as follows:

[0682] When the information is sent to the terminal device, the first formula is selected.

[0683] When the information is not sent to the terminal device, the second formula is selected.

Claims

1. A terminal device (10), comprising: A control unit (110); as well as a communication unit (120) configured to perform wireless communication by being controlled by the control unit, The control unit is configured to start a discontinuous reception (DRX) cycle using a formula including a correction value for a system frame number (SFN).

2. The terminal device according to claim 1, 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.

3. The terminal device according to claim 2, The correction value is a value that increases as the number of times the SFN is updated from the maximum value to the initial value increases.

4. The terminal device according to claim 3, 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 shifting the SFN.

5. The terminal device according to claim 4, The control unit is further configured to receive information related to the second value from a base station device via the communication unit.

6. The terminal device according to claim 5, The control unit is further configured to: upon receiving the information related to the second value, start the cycle of the DRX using the formula.

7. The terminal device according to claim 6, The formula is the first formula, The control unit is further configured to: start the cycle of the DRX using a second formula that does not include the correction value, The control unit is configured to start the DRX cycle using the second formula when the information related to the second value is not received.

8. The terminal device according to claim 4, The control unit is further configured to calculate a remainder when a time length of one cycle of the SFN is divided by a time length of the cycle of the DRX, as the second value.

9. The terminal device according to claim 8, The control unit is further configured to: when a use condition related to the formula is satisfied, use the formula to start the cycle of the DRX, The use condition is one or a combination of two or more selected from the following conditions: The condition that the time length of one cycle of the SFN is not an integer multiple of the time length of the cycle of the DRX; The condition that the time length of the cycle of the DRX is a non-integer value; and The control unit receives a condition that information instructing to use the formula from the base station device.

10. The terminal device according to claim 9, The formula is the first formula, The control unit is further configured to: start the cycle of the DRX using a second formula that does not include the correction value, The control unit is configured to: when the use condition is not satisfied, use the second formula to start the cycle of the DRX.

11. The terminal device according to claim 2 or 3, The control unit is further configured to calculate the correction value using a hyper system frame number (H-SFN) and a value corresponding to the number of SFNs included in one cycle of the H-SFN.

12. The terminal device according to claim 11, The control unit is further configured to: when a use condition related to the formula is satisfied, use the formula to start the cycle of the DRX, The use condition is one or a combination of two or more selected from the following conditions: The condition that the time length of one cycle of the SFN is not an integer multiple of the time length of the cycle of the DRX; The condition that the time length of the cycle of the DRX is a non-integer value; A condition that the control unit receives information instructing to use the formula from the base station device; and The control unit receives the information on the H-SFN from the base station device.

13. The terminal device according to claim 12, The formula is the first formula, The control unit is further configured to: start the cycle of the DRX using a second formula that does not include the correction value, The control unit is configured to: when the use condition is not satisfied, use the second formula to start the cycle of the DRX.

14. A method of a terminal device (10), comprising: Determining whether a formula is established, wherein the formula includes a correction value for a system frame number (SFN); as well as When the above formula holds true, the on-period of discontinuous reception (DRX) starts.

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