Terminal and communication method

Abstract

The terminal includes: a receiving unit that receives a signal indicating whether to monitor the PDCCH (Physical Downlink Control Channel) monitoring opportunity for paging from a base station before the PDCCH monitoring opportunity; and a control unit that determines whether to monitor the PDCCH monitoring opportunity based on the signal.

Description

Technical Field

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

[0002] In the successor system of LTE (Long Term Evolution), namely NR (New Radio) (also known as "5G"), technologies that meet the requirements of large-capacity systems, high data transmission speeds, low latency, simultaneous connection of multiple terminals, low costs, and power saving are being studied (for example, non-patent document 1).

[0003] NR Release 17 is studying power-saving actions for UEs in idle or inactive mode, taking system performance into consideration. For example, the study examines methods for suppressing unnecessary paging reception without impacting legacy UEs.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-Patent Document 1: 3GPP TS 38.300 V16.0.0 (December 2019) Summary of the Invention

[0007] Problems to be solved by the invention

[0008] In conventional paging, a terminal cannot know in advance whether it needs to attempt monitoring or reception of a PDCCH (Physical Downlink Control Channel), so unnecessary monitoring may occur, hindering power saving.

[0009] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to reduce power consumption when monitoring paging in a wireless communication system.

[0010] Means used to solve problems

[0011] According to the disclosed technology, a terminal is provided, which comprises: a receiving unit which receives a signal indicating whether it is necessary to monitor the PDCCH (Physical Downlink Control Channel) monitoring opportunity for paging from a base station before the PDCCH monitoring opportunity; and a control unit which decides whether to monitor the PDCCH monitoring opportunity based on the signal.

[0012] Effects of the Invention

[0013] According to the disclosed technology, in a wireless communication system, power consumption when monitoring paging can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a diagram showing a configuration example of a wireless communication system in an embodiment of the present invention.

[0015] Figure 2 is a diagram showing an example of settings related to paging.

[0016] Figure 3 This is a flowchart for explaining the paging operation in the embodiment of the present invention.

[0017] Figure 4 This is a diagram showing an example (1) of settings related to paging in an embodiment of the present invention.

[0018] Figure 5 This is a diagram showing example (2) of settings related to paging in an embodiment of the present invention.

[0019] Figure 6 This is a diagram showing example (3) of settings related to paging in an embodiment of the present invention.

[0020] Figure 7 This is a diagram showing an example of the functional configuration of the base station 10 in the embodiment of the present invention.

[0021] Figure 8 This is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention.

[0022] Figure 9 This is a diagram showing an example of the hardware configuration of the base station 10 or the terminal 20 in the embodiment of the present invention. DETAILED DESCRIPTION

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Note that the embodiment described below is merely an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0024] The wireless communication system according to the embodiments of the present invention may appropriately utilize existing technologies when operating. Such existing technologies include, but are not limited to, existing LTE. Furthermore, unless otherwise specified, the term "LTE" used in this specification has a broad meaning encompassing LTE-Advanced and later generations (e.g., NR).

[0025] In addition, in the embodiments of the present invention described below, terms such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel) used in existing LTE are used. This is for convenience of explanation, and the same signals, functions, etc. may also be referred to by other names. In addition, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even signals used in NR are not necessarily explicitly written as "NR-".

[0026] Furthermore, in the embodiment of the present invention, the duplexing method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (eg, Flexible Duplex, etc.).

[0027] Furthermore, in the embodiment of the present invention, “configuring” wireless parameters and the like may be pre-configuring predetermined values, or may be configuring wireless parameters notified from the base station 10 or the terminal 20 .

[0028] Figure 1 1 is a diagram for explaining a configuration example of a wireless communication system in an embodiment of the present invention. Figure 1 As shown, the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20 . Figure 1 Although one base station 10 and one terminal 20 are shown in each figure, this is merely an example, and a plurality of each may be provided.

[0029] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined by the time domain and the frequency domain. The time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or resource blocks. The base station 10 sends synchronization signals and system information to the terminal 20. Synchronization signals are, for example, NR-PSS and NR-SSS. System information is sent, for example, through NR-PBCH, also known as broadcast information. Figure 1 As shown, the base station 10 sends a control signal or data to the terminal 20 via DL (Downlink), and receives a control signal or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. In addition, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output)-based communications to DL or UL. In addition, both the base station 10 and the terminal 20 can communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) based on CA (Carrier Aggregation). In addition, the terminal 20 can also communicate via the primary cell of the base station 10 based on DC (Dual Connectivity) and the primary and secondary cell group cells (PSCell: Primary Secondary cell group Cell) of other base stations 10.

[0030] The terminal 20 is a communication device with wireless communication function, such as a smart phone, mobile phone, tablet computer, wearable terminal, M2M (Machine-to-Machine: Machine to Machine) communication module, etc. Figure 1 As shown, the terminal 20 receives a control signal or data from the base station 10 via DL and transmits a control signal or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system.

[0031] NR Release 17 is exploring power-saving actions for UEs in idle or inactive modes, taking system performance into consideration. For example, the study explores methods for suppressing unnecessary paging reception without impacting legacy UEs.

[0032] Figure 2 FIG is a diagram showing an example of settings related to paging. Figure 2As shown, in the paging of the terminal 20 in the idle mode or the inactive mode, a PF (Paging frame), a PO (Paging occasion), and a PDCCH monitoring occasion are set. Figure 2 The relative positions of the PF, PO, and PDCCH monitoring occasion in the time domain are schematically shown. Hereinafter, the PDCCH monitoring occasion for paging is also simply referred to as the PDCCH monitoring occasion.

[0033] The PF is determined by calculating the position of the message sent to the terminal 20 itself based on the terminal identifier (eg, UE-ID), etc. In addition, the PF includes one or more POs or the starting position of the PO in the time domain.

[0034] The PO is determined by calculating the position of the terminal 20 itself based on the terminal identifier (eg, UE-ID), etc. In addition, the PO includes one or more PDCCH monitoring opportunities in the time domain.

[0035] Regarding the PDCCH monitoring opportunity, such as Figure 2 As shown, according to each SSB (SS / PBCH block) (in Figure 2 In the example, the network can set multiple PDCCH monitoring opportunities corresponding to a certain SSB for one PO.

[0036] In conventional paging, a terminal cannot know in advance whether it needs to perform monitoring or reception of a PDCCH (Physical Downlink Control Channel), so unnecessary monitoring may occur, hindering power saving.

[0037] Thus, the base station 10 can notify the terminal 20 in advance whether it is necessary to monitor / receive the PDCCH and / or PDSCH for trial paging. Hereinafter, the signal that notifies the terminal 20 in advance whether it is necessary to monitor / receive the PDCCH and / or PDSCH for trial paging is referred to as a paging initiation signal, but this is not limited to this and may be referred to by other names. The paging initiation signal can also be expressed as a Paging WUS (wake-up signal).

[0038] Figure 3This is a flowchart illustrating paging operations in accordance with an embodiment of the present invention. In step S1, terminal 20 receives a paging initiation signal from base station 10. In the following step S2, terminal 20 monitors the PDCCH monitoring opportunity corresponding to the paging initiation signal. If the monitoring is successful and paging reception is successful, terminal 20 initiates communication with base station 10.

[0039] Figure 4 FIG. 1 is a diagram showing an example (1) of a setting related to paging in an embodiment of the present invention. Figure 4 As shown, the corresponding paging start signal can be determined according to each PDCCH monitoring opportunity. That is, the paging start signal and the PDCCH monitoring opportunity can be associated in a one-to-one manner. Figure 4 In the example shown, starting from the start of the eight paging start signals, they correspond in sequence to the PDCCH monitoring timing associated with SSB#0, the PDCCH monitoring timing associated with SSB#1, the PDCCH monitoring timing associated with SSB#2, the PDCCH monitoring timing associated with SSB#3, the PDCCH monitoring timing associated with SSB#0, the PDCCH monitoring timing associated with SSB#1, the PDCCH monitoring timing associated with SSB#2, and the PDCCH monitoring timing associated with SSB#3.

[0040] Figure 5 This is a diagram showing an example (2) of settings related to paging in an embodiment of the present invention. Figure 5 As shown in FIG, a corresponding paging start signal may be determined according to each of a plurality of PDCCH monitoring opportunities associated with a plurality of SSBs. Figure 5 In the figure, there is an example in which the PDCCH monitoring opportunities corresponding to two SSBs correspond to one paging start signal. Starting from the start of the four paging start signals, they correspond to the PDCCH monitoring opportunities associated with SSB#0 and SSB#1, the PDCCH monitoring opportunities associated with SSB#2 and SSB#3, the PDCCH monitoring opportunities associated with SSB#0 and SSB#1, and the PDCCH monitoring opportunities associated with SSB#2 and SSB#3.

[0041] In addition, for example, the PDCCH monitoring opportunities associated with all SSBs may correspond to one paging activation signal.

[0042] Figure 6 This is a diagram showing an example (3) of settings related to paging in an embodiment of the present invention. Figure 6 As shown in FIG, a corresponding paging start signal may be determined according to each of a plurality of PDCCH monitoring opportunities corresponding to one SSB. Figure 6Among them, starting from the start of the four paging start signals, they correspond to the PDCCH monitoring timing associated with SSB#0, the PDCCH monitoring timing associated with SSB#1, the PDCCH monitoring timing associated with SSB#2, and the PDCCH monitoring timing associated with SSB#3.

[0043] Furthermore, the timing for the paging activation signal may be utilized. This timing may be newly defined or the timing of WUS in LTE-IoT (Internet of Things) may be utilized.

[0044] Furthermore, the paging activation signal can be transmitted as a PDCCH. The DCI (Downlink Control Information) format used for this PDCCH can be newly defined or an existing format can be used. For example, DCI format 2_6 can be used in the PDCCH used as the paging activation signal.

[0045] When the paging activation signal is transmitted as the PDCCH, the base station 10 can notify the terminal 20 through the paging activation signal whether it is necessary to monitor the PDCCH in the PDCCH monitoring opportunity.

[0046] Furthermore, when the paging activation signal is transmitted as the PDCCH, the base station 10 can notify the terminal 20 of scheduling of the PDSCH including the paging message through the paging activation signal.

[0047] For example, whether or not to monitor the PDCCH during the PDCCH monitoring opportunity may be switched depending on whether the terminal 20 detects a paging initiation signal at a designated location. If the paging initiation signal is detected, the terminal may directly receive the PDSCH without monitoring the PDCCH, or may be notified that the PDSCH may not be received. If the paging initiation signal is not detected, the terminal may monitor the PDCCH during the PDCCH monitoring opportunity.

[0048] Furthermore, whether or not to monitor the PDCCH during the PDCCH monitoring opportunity can be switched depending on whether a paging activation signal is set in the terminal 20. If a paging activation signal is set, the terminal 20 may directly receive the PDSCH without monitoring the PDCCH, or may be notified that the PDSCH is not to be received. If a paging activation signal is not set, the terminal 20 may monitor the PDCCH during the PDCCH monitoring opportunity.

[0049] According to the above-described embodiment, the terminal 20 can determine in advance the necessity of monitoring at the PDCCH monitoring opportunity based on the paging activation signal, thereby suppressing unnecessary monitoring and achieving power saving operation.

[0050] That is, in a wireless communication system, power consumption when monitoring paging can be reduced.

[0051] (Device Structure)

[0052] Next, the functional configuration examples of the base station 10 and terminal 20 that perform the above-described processing and operations are described. The base station 10 and terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and terminal 20 may each include only a portion of the functions described in the embodiments.

[0053] Base Station 10

[0054] Figure 7 FIG. 1 is a diagram showing an example of the functional configuration of the base station 10 according to the embodiment of the present invention. Figure 7 As shown, the base station 10 includes a transmitting unit 110 , a receiving unit 120 , a setting unit 130 , and a control unit 140 . Figure 7 The functional configuration shown is merely an example, and any functional divisions and names of functional units may be used as long as the operations according to the embodiments of the present invention can be performed.

[0055] The transmitter 110 includes the function of generating a signal to be sent to the terminal 20 and wirelessly transmitting the signal. Furthermore, the transmitter 110 transmits inter-network node messages to other network nodes. The receiver 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining, for example, higher-layer information from the received signals. Furthermore, the transmitter 110 has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. Furthermore, the receiver 120 receives inter-network node messages from other network nodes.

[0056] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, settings related to paging of the terminal 20.

[0057] As described in the embodiment, the control unit 140 performs control related to paging. Alternatively, the functional units related to signal transmission in the control unit 140 may be included in the transmitter 110 , and the functional units related to signal reception in the control unit 140 may be included in the receiver 120 .

[0058] Terminal 20

[0059] Figure 8 FIG. 1 is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention. Figure 8 As shown, the terminal 20 includes a transmitting unit 210 , a receiving unit 220 , a setting unit 230 , and a control unit 240 . Figure 8The functional configuration shown is merely an example, and any functional divisions and names of functional units may be used as long as the operations according to the embodiments of the present invention can be performed.

[0060] The transmitting unit 210 generates a transmission signal based on the transmission data and wirelessly transmits the transmission signal. The receiving unit 220 wirelessly receives various signals and obtains higher-layer signals from the received physical layer signals. In addition, the receiving unit 220 has the function of receiving NR-PSS, NR-SSS, NR-PBCH, and DL / UL / SL control signals transmitted from the base station 10. In addition, for example, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to other terminals 20 for D2D communication, and the receiving unit 120 receives PSCCH, PSSCH, PSDCH, or PSBCH, etc. from other terminals 20.

[0061] The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10. The setting unit 230 also stores pre-set setting information. The content of the setting information is, for example, settings related to paging of the terminal 20.

[0062] As described in the embodiment, the control unit 240 performs control related to paging. Alternatively, the signal transmission related functional units of the control unit 240 may be included in the transmitter 210, and the signal reception related functional units of the control unit 240 may be included in the receiver 220.

[0063] (Hardware Structure)

[0064] The block diagram used in the description of the above embodiment ( Figure 7 and Figure 8) shows blocks in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a device that is physically or logically combined, or it can be implemented by connecting two or more physically or logically separated devices directly or indirectly (for example, using wired or wireless connections) and using these multiple devices. The functional block can also be implemented by combining software with the above-mentioned one device or the above-mentioned multiple devices.

[0065] Functionally, these include, but are not limited to, judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. For example, a functional block (structural unit) that enables the transmission function is called a transmitting unit or a transmitter. In short, as described above, there is no particular limitation on the implementation method.

[0066] For example, the base station 10 , the terminal 20 , and the like in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 9 This figure shows an example of the hardware configuration of a base station 10 and a terminal 20 according to one embodiment of the present disclosure. The base station 10 and the terminal 20 described above may also be configured as a computer device that physically includes a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0067] In the following description, the word "device" can be replaced with "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and the terminal 20 may include one or more of the devices shown in the drawings, or may exclude some of the devices.

[0068] The various functions in the base station 10 and the terminal 20 are implemented by reading predetermined software (programs) into hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs calculations and controls the communication of the communication device 1004 or controls at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

[0069] Processor 1001 controls the entire computer by, for example, executing an operating system. Processor 1001 may also be comprised of a central processing unit (CPU) including interfaces with peripheral devices, a control unit, a computing unit, registers, and the like. For example, control unit 140 and control unit 240 described above may also be implemented by processor 1001.

[0070] Furthermore, the processor 1001 reads a program (program code), a software module, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and performs various processes accordingly. As a program, a program that causes the computer to execute at least a part of the actions described in the above embodiments is used. For example, Figure 7 The control unit 140 of the base station 10 shown may also be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. Figure 8 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. Regarding the various processes described above, although they are described as being executed by a single processor 1001, they can also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be implemented on one or more chips. Furthermore, the program can be transmitted from a network via a telecommunications line.

[0071] The storage device 1002 is a computer-readable recording medium and may be composed of, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The storage device 1002 can store executable programs (program code), software modules, etc., for implementing the communication method according to one embodiment of the present disclosure.

[0072] The auxiliary storage device 1003 is a computer-readable recording medium, and can be composed of at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic stripe, etc. The above-mentioned storage medium can be, for example, other appropriate media such as a database, a server, etc. that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0073] Communication device 1004 is hardware (a transceiver) used to facilitate communication between computers via at least one of a wired network and a wireless network. For example, it may also be referred to as a network device, a network controller, a network card, or a communication module. Communication device 1004 may include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, communication device 1004 may also implement a transceiver antenna, an amplifier, a transceiver, a transmission path interface, and the like. The transceiver may be physically or logically separated in the transmitter and receiver.

[0074] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, LED light, etc.). Alternatively, the input device 1005 and the output device 1006 may be integrally formed (e.g., a touch panel).

[0075] Furthermore, the processor 1001, the storage device 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using separate buses for each device.

[0076] Furthermore, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or an FPGA (Field Programmable Gate Array), and may implement some or all of the functional blocks using this hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0077] (Summary of Implementation Methods)

[0078] As described above, according to an embodiment of the present invention, a terminal is provided, which comprises: a receiving unit, which receives a signal indicating whether it is necessary to monitor the PDCCH (Physical Downlink Control Channel) monitoring opportunity for paging from a base station before the PDCCH monitoring opportunity; and a control unit, which decides whether to monitor the PDCCH monitoring opportunity based on the signal.

[0079] With the above configuration, terminal 20 can determine the necessity of monitoring the PDCCH monitoring opportunity in advance based on the paging activation signal, thereby suppressing unnecessary monitoring and achieving power saving.

[0080] The control unit may determine one PDCCH monitoring timing based on one signal. With this configuration, the terminal 20 can determine the PDCCH monitoring timing to be monitored based on the paging activation signal.

[0081] The control unit can determine the plurality of PDCCH monitoring opportunities associated with a plurality of SSBs (SS PBCH / blocks) based on one signal. With this configuration, the terminal 20 can determine the PDCCH monitoring opportunities to be monitored based on the paging activation signal.

[0082] The control unit can determine the plurality of PDCCH monitoring opportunities associated with one SSB based on one signal. With this configuration, the terminal 20 can determine the PDCCH monitoring opportunity to be monitored based on the paging activation signal.

[0083] The signal may be transmitted from the base station as the PDCCH. With this configuration, the terminal 20 can determine whether to monitor the PDCCH monitoring timing.

[0084] In addition, according to an embodiment of the present invention, a communication method is provided, wherein the communication method is performed by a terminal: a receiving step, before the PDCCH (Physical Downlink Control Channel) monitoring timing for paging, receiving a signal from a base station indicating whether it is necessary to monitor the PDCCH monitoring timing; and a control step, deciding whether to monitor the PDCCH monitoring timing based on the signal.

[0085] With the above configuration, terminal 20 can determine the necessity of monitoring the PDCCH monitoring opportunity in advance based on the paging activation signal, thereby suppressing unnecessary monitoring and achieving power saving.

[0086] (Supplementary Implementation Methods)

[0087] The above describes the embodiments of the present invention, but the disclosed invention is not limited to such embodiments, and a person skilled in the art should understand various variations, modifications, substitutions, replacements, etc. To facilitate understanding of the invention, specific numerical examples are used for description, but unless otherwise specified, these numerical values ​​are merely examples, and any appropriate value may be used. The distinction between the items in the above description is not essential to the present invention. Matters recorded in two or more items may be combined and used as needed, and matters recorded in one item may be applied to matters recorded in other items (as long as there is no contradiction). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical components. The actions of multiple functional units may be physically performed by one component, or the actions of one functional unit may be physically performed by multiple components. Regarding the processing procedures described in the embodiments, the order of the processing may be reversed if there is no contradiction. For the convenience of explaining the processing, the base station 10 and the terminal 20 are described using functional block diagrams, but such devices may also be implemented using hardware, software, or a combination thereof. The software that operates by the processor of the base station 10 according to the embodiment of the present invention and the software that operates by the processor of the terminal 20 according to the embodiment of the present invention can also be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server and other appropriate storage media.

[0088] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), high-layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof. In addition, RRC signaling may also be referred to as an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0089] Each form / embodiment described in this disclosure may also be applied to at least one of LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), systems using other appropriate systems, and next-generation systems extended therefrom. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G) may also be applied.

[0090] The processing procedures, timings, and flows of each form / implementation described in this specification may be performed in a different order unless there is a conflict. For example, the methods described in this disclosure use an illustrative order to present the elements of various steps, but are not limited to the specific order presented.

[0091] In this specification, specific actions performed by base station 10 may be performed by its upper node, depending on the situation. In a network consisting of one or more network nodes including base station 10, various actions performed to communicate with terminal 20 may be performed by at least one of base station 10 and other network nodes other than base station 10 (e.g., MME or S-GW, but not limited thereto). While the above example illustrates a single other network node other than base station 10, the other network node may also be a combination of multiple other network nodes (e.g., MME and S-GW).

[0092] The information or signals described in this disclosure can be output from a higher layer (or lower layer) to a lower layer (or higher layer), and can also be input or output via multiple network nodes.

[0093] Input or output information can be stored in a specific location (e.g., memory) or managed using a management table. Input or output information can be overwritten, updated, or appended. Output information can also be deleted. Input information can also be sent to other devices.

[0094] The determination in the present disclosure may be performed using a value represented by one bit (0 or 1), a Boolean value (Boolean: true or false), or a comparison of numerical values ​​(for example, comparison with a predetermined value).

[0095] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to instructions, sets of instructions, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0096] Furthermore, software, commands, information, and the like may be transmitted and received via a transmission medium. For example, if software is transmitted from a web page, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0097] The information, signals, etc. described in this disclosure may also be represented using any of a variety of different technologies. For example, data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be referred to in the entire description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0098] In addition, the terms used in this disclosure and those necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

[0099] The terms "system" and "network" used in this disclosure may be used interchangeably.

[0100] In addition, the information, parameters, etc. described in this disclosure may be represented by absolute values, relative values ​​relative to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0101] The names used for the above parameters are not limiting in any way. Furthermore, the formulas and the like using these parameters may sometimes differ from those explicitly stated in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by appropriate names, and the various names assigned to these various channels and information elements are not limiting in any way.

[0102] In this disclosure, terms such as "base station (BS)," "wireless base station," "base station apparatus," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" are used interchangeably. Base stations may also be referred to as macrocells, small cells, femtocells, and picocells.

[0103] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the base station's overall coverage area can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (for example, a small base station for indoor use (RRH: Remote Radio Head)). Terms such as "cell" or "sector" refer to a portion or the entire coverage area of ​​at least one of the base station and base station subsystem that provide communication services within the coverage area.

[0104] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0105] For mobile stations, those skilled in the art sometimes also use the following terms to refer to them: subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terms.

[0106] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), a mobile body that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0107] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, regarding a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple terminals 20 (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything, etc.), the various forms / implementations of the present disclosure may also be applied. In this case, it may also be configured such that the terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, statements such as "uplink" and "downlink" may also be replaced by wording corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0108] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station may also have the functions of the user terminal described above.

[0109] As used in this disclosure, terms such as “determining” and “determining” sometimes also include situations in which a variety of actions are performed. For example, “determining” and “judging” may include situations in which matters such as judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (for example, searching in a table, database or other data structure), and ascertaining are considered to have been “judged” or “determined”. In addition, “determining” and “receiving” (for example, receiving information), transmitting (for example, sending information), inputting, outputting, and accessing (for example, accessing data in a memory) are considered to have been “judged” or “determined”. In addition, “determining” and “resolving” may include situations in which matters such as selecting, choosing, establishing, and comparing are considered to have been “judged” or “determined”. That is, "judgment" and "decision" can include "judgment" and "decision" of any action. In addition, "judgment (decision)" can be replaced by "assuming (assuming)", "expecting (expecting)", and "considering (considering)".

[0110] The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, including the situation where there is one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The combination or connection between elements can be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" can be used to replace "connection". In the context of the present disclosure, two elements can be considered to be "connected" or "coupled" to each other by using at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-inclusive examples, by using electromagnetic energy such as electromagnetic energy with wavelengths in the wireless frequency domain, microwave region and light (including both visible and invisible) region.

[0111] The reference signal may be referred to as RS (Reference Signal) for short, or may be called a pilot signal depending on the applied standard.

[0112] The phrase "according to" used in this disclosure does not mean "only according to" unless otherwise expressly stated. In other words, the phrase "according to" means both "only according to" and "at least according to."

[0113] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily limit the number or order of those elements. These designations are used in this disclosure as a convenient way to distinguish between two or more elements. Therefore, a reference to a first and a second element does not imply that only two elements can be used or that the first element must precede the second element in any manner.

[0114] The “unit” in each of the above-mentioned device structures can be replaced with a “section”, “circuit”, “device”, etc.

[0115] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, the term "or" used in this disclosure does not mean an exclusive OR.

[0116] A radio frame can be composed of one or more frames in the time domain. One or more frames in the time domain can also be called a subframe. A subframe can also be composed of one or more time slots in the time domain. A subframe can be of a fixed duration (e.g., 1 ms) independent of numerology.

[0117] A parameter set may also be a communication parameter applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set may represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by the transceiver in the frequency domain, specific windowing performed by the transceiver in the time domain, and the like.

[0118] In the time domain, a slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) A slot may be a time unit based on a parameter set.

[0119] A time slot may also contain multiple mini-slots. Each mini-slot may consist of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as PDSCH (or PUSCH) mapping type B.

[0120] Radio frame, subframe, time slot, mini-time slot, and symbol all represent time units for signal transmission. Radio frame, subframe, time slot, mini-time slot, and symbol may also be referred to by other corresponding names.

[0121] For example, a subframe can also be called a Transmission Time Interval (TTI), multiple consecutive subframes can also be called a TTI, and a slot or minislot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. Furthermore, the unit representing a TTI can be a slot, a minislot, or the like, rather than a subframe.

[0122] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communications. For example, in the LTE system, a base station schedules each terminal 20 by allocating wireless resources (such as the frequency bandwidth and transmit power available to each terminal 20) in units of TTI. The definition of TTI is not limited to this.

[0123] A TTI can be a unit of time for transmitting data packets (transport blocks), code blocks, code words, etc. after channel coding, or a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is assigned, the time interval (e.g., the number of symbols) to which a transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0124] Furthermore, when one time slot or one mini-time slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) may constitute the minimum time unit for scheduling. Furthermore, the number of time slots (mini-time slots) constituting the minimum time unit for scheduling may also be controlled.

[0125] A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini-slot, a subslot, a time slot, etc.

[0126] In addition, long TTI (e.g., normal TTI, subframe, etc.) can be replaced by TTI with a time length exceeding 1ms, and short TTI (e.g., shortened TTI, etc.) can also be replaced by TTI with a TTI length smaller than that of long TTI and greater than 1ms.

[0127] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it may also contain one or more consecutive subcarriers. The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can be determined based on the parameter set.

[0128] In addition, the time domain of an RB may include one or more symbols, and may be of length 1 slot, 1 minislot, 1 subframe, or 1 TTI. 1 TTI, 1 subframe, etc. may also be composed of one or more resource blocks.

[0129] In addition, one or more RBs may also be referred to as a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, etc.

[0130] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0131] A bandwidth part (BWP) (also known as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a parameter set within a carrier. Common RBs can also be identified by their index relative to the common reference point of the carrier. PRBs can also be defined by a BWP and numbered within that BWP.

[0132] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). For a UE, one or more BWPs may be configured within one carrier.

[0133] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive predetermined signals / channels other than the activated BWP.

[0134] The above-described structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, various changes may be made to the structures including the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length.

[0135] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure also includes cases where the noun following the article is in plural form.

[0136] In this disclosure, the phrase "A and B are different" can also mean "A and B are different from each other." Furthermore, the phrase can also mean "A and B are each different from C." Terms such as "separate" and "bound" can also be interpreted similarly as meaning "different."

[0137] Each form / implementation described in this disclosure may be used individually or in combination, and may be switched depending on the execution. In addition, notification of scheduled information is not limited to being performed explicitly (e.g., notification of "yes X"), but may also be performed implicitly (e.g., not notifying the scheduled information).

[0138] In the present disclosure, the paging activation signal is an example of a signal indicating whether or not it is necessary to monitor a PDCCH (Physical Downlink Control Channel) monitoring timing for paging.

[0139] While the present disclosure has been described in detail above, it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in various modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes only and does not have any limiting meaning on the present disclosure.

[0140] Description of labels:

[0141] 110 Sending Department

[0142] 120 Receiving Department

[0143] 130 Setting Department

[0144] 140 Control Department

[0145] 20 Terminal

[0146] 210 Sending Department

[0147] 220 Receiving Department

[0148] 230 Setting Department

[0149] 240 Control Department

[0150] 1001 Processor

[0151] 1002 Storage Device

[0152] 1003 Auxiliary storage device

[0153] 1004 Communication device

[0154] 1005 Input Device

[0155] 1006 Output Device

Claims

1. A terminal, wherein: The terminal has: a receiving unit that receives a paging activation signal transmitted as a PDCCH; and a control unit that monitors a PDCCH monitoring opportunity associated with the paging activation signal, The paging start signal indicates whether the terminal needs to monitor the PDCCH monitoring opportunity, The control unit determines whether to monitor the PDCCH monitoring timing according to the paging activation signal, The paging initiation signal corresponds to a plurality of PDCCH monitoring opportunities, and the PDCCH monitoring opportunities are associated with a plurality of SSBs, where the SSBs refer to synchronization signal / physical broadcast channel blocks.

2. The terminal according to claim 1, wherein: A format of downlink control information is applied to the PDCCH used for transmitting the paging activation signal.

3. A communication method, which is performed by a terminal, wherein: The communication method comprises the following steps: receiving a paging initiation signal sent as a PDCCH; as well as monitoring a PDCCH monitoring opportunity associated with the paging initiation signal, The paging start signal indicates whether the terminal needs to monitor the PDCCH monitoring opportunity, The step of performing the monitoring determines whether to monitor the PDCCH monitoring opportunity according to the paging start signal, The paging initiation signal corresponds to a plurality of PDCCH monitoring opportunities, and the PDCCH monitoring opportunities are associated with a plurality of SSBs, where the SSBs refer to synchronization signal / physical broadcast channel blocks.

4. A communication system comprising a terminal and a base station, wherein: The base station sends a paging start signal as a PDCCH transmission, The terminal receives the paging start signal, The terminal monitors a PDCCH monitoring opportunity associated with the paging initiation signal, The paging start signal indicates whether the terminal needs to monitor the PDCCH monitoring opportunity, The terminal determines whether to monitor the PDCCH monitoring opportunity according to the paging start signal, The paging initiation signal corresponds to a plurality of PDCCH monitoring opportunities, and the PDCCH monitoring opportunities are associated with a plurality of SSBs, where the SSBs refer to synchronization signal / physical broadcast channel blocks.

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