Terminal and communication method

Abstract

The terminal comprises: a control unit, which, upon receiving a scheduling instruction from a base station, controls which of an RRM measurement operation and a scheduling operation is to be performed first in an object resource of an SMTC window or a measurement gap, according to whether a benchmark for priority of the scheduling operation is met; and a sending and receiving unit, which, when giving priority to the scheduling operation, performs downlink reception or uplink transmission in the object resource.

Description

Technical Field

[0001] The present disclosure relates to a terminal and a communication method. Background Art

[0002] In the Universal Mobile Telecommunication System (UMTS) network, the successor system of Long Term Evolution (LTE) is discussed (Non-Patent Document 1). The successor systems of LTE include, for example, systems called LTE-A (LTE-Advanced), FRA (Future Radio Access), 5G (fifth generation mobile communication system), 5G+ (5G plus), New-RAT (Radio Access Technology; NR), etc.

[0003] When performing handover to another cell or adding a CC (Component Carrier) in CA (Carrier Aggregation), the terminal measures the reception quality of the other cell in advance in order to appropriately perform these processes while maintaining communication quality.

[0004] The measurement of reception quality in NR (RRM (Radio Resource Management) measurement) is carried out using SSB (SS / PBCH Block) composed of a synchronization signal (Synchronization Signal: SS) and a downlink physical broadcast channel (PBCH: Physical Broadcast Channel), wherein the synchronization signal has a longer transmission period than the CRS (Cell specific Reference Signal).

[0005] The RRM measurement period does not need to be the same as the SSB transmission period. In order to suppress the power consumption of the terminal, it is desired to be appropriately set according to the environment. Therefore, a function is introduced to notify the terminal of the measurement period and timing of the SSB used by the terminal in the measurement from the own cell, namely the SMTC (SSB based RRM measurement Timing Configuration) window (SMTC window).

[0006] In addition, in order to measure the reception quality of a cell / CC with a frequency different from that of the own cell, the terminal needs to temporarily interrupt the communication in the current state. This interruption period is called a measurement gap (see Non-Patent Document 1).

[0007] The period of the SMTC window and the period of the measurement gap are notified from the base station to the terminal through RRC configuration.

[0008] Except for special circumstances, the terminal prioritizes RRM measurement operations over scheduling operations in resources that become the objects of the SMTC window or measurement gap (hereinafter referred to as "object resources"), and does not receive DL signals or send UL signals (scheduling restriction) (refer to non-patent document 2).

[0009] Prior art literature

[0010] Non-patent literature

[0011] Non-patent document 1: 3GPP TS 38.133 V15.4.0

[0012] Non-patent document 2: 3GPP TS 38.213 V15.4.0 Summary of the invention

[0013] Problems to be solved by the invention

[0014] In future wireless systems, it is required to utilize resources dynamically and flexibly.

[0015] However, as described above, conventionally, except for special cases, RRM measurement operations are generally prioritized over scheduling operations (reception of DL signals and transmission of UL signals), and therefore resources cannot be used dynamically and flexibly.

[0016] One of the objects of the present invention is to utilize resources dynamically and flexibly.

[0017] Means for solving problems

[0018] A terminal involved in one embodiment of the present disclosure comprises: a control unit, which, upon receiving a scheduling instruction from a base station, controls which of an RRM measurement operation and a scheduling operation is to be performed first in an object resource of an SMTC window or a measurement gap according to whether a criterion for priority of the scheduling operation is met; and a sending and receiving unit, which, when giving priority to the scheduling operation, performs downlink reception or uplink transmission in the object resource.

[0019] Effects of the Invention

[0020] According to the present disclosure, even when scheduling restrictions have occurred in the past, it is possible to cancel the RRM measurement operation and perform the scheduling operation, so that resources can be used dynamically and flexibly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a block diagram showing a structural example of a base station.

[0022] Figure 2 This is a block diagram showing a structural example of a terminal.

[0023] Figure 3 This is a diagram showing an example of priority control of scheduling operations according to an embodiment of the present disclosure.

[0024] Figure 4 This is a diagram showing an example of priority control of scheduling operations according to an embodiment of the present disclosure.

[0025] Figure 5 This is a diagram showing an example of the hardware configuration of a base station and a terminal. DETAILED DESCRIPTION

[0026] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0027] (Implementation Method 1)

[0028] In non-patent document 2, the following meaning is stipulated: in the FR1 (Frequency Range 1, 450MHz-6.0GHz) TDD band (FR1 TDD band), when there is no scheduling restriction caused by RRM measurement, when the terminal is scheduled for UL transmission, RRM measurement using the SSB or CSI-RS (Channel State Information-Reference Signal) of the surrounding cells may not be performed on its codeword; and, in the FR1 TDD band, when the SSB and the SCS (Subcarrier Spacing) of the data are different and the terminal does not support the capability of simultaneousRxDataSSB-DiffNumerology, scheduling restriction caused by RRM measurement occurs.

[0029] In addition, non-patent document 1 states the following: In FR1, when the SSB is different from the SCS of the PDCCH / PDSCH and the terminal does not support the capability of simultaneousRxDataSSB-DiffNumerology (not reported to the base station), the terminal prioritizes RRM measurement over scheduling operations, during which time, even if PDCCH (Physical Downlink Control Channel) / PDSCH (Physical Downlink Shared Channel) / TRS (Tracking Reference Signal) / CSI-RS reception or PUCCH (Physical Uplink Control Channel) / PUSCH (Physical Uplink Shared Channel) / SRS (Sounding Reference Signal) transmission is not possible; and, in the case where scheduling restrictions occur in a specific CC in intra-band CA, the same scheduling restrictions also occur in other intra-band CCs.

[0030] In addition, non-patent document 1 states the following: In FR2 (Frequency Range 2, 24.25GHz-52.6GHz), the terminal prioritizes RRM measurements over scheduling operations through the constraints of analog beamforming, regardless of SCS, even if PDCCH / PDSCH / TRS / CSI-RS reception or PUCCH / PUSCH / SRS transmission is not possible; and, in FR2 intra / inter-band CA, when scheduling restrictions occur in a specific CC, the same scheduling restrictions also occur in other FR2 intra / inter-band CCs.

[0031] As described above, conventionally, in the FR1 TDD band, except for special cases where the SSB is the same as the SCS of the data or the terminal supports the capability of simultaneousRxDataSSB-DiffNumerology, RRM measurement operations always take precedence over scheduling operations in the target resources, resulting in scheduling restrictions.

[0032] Therefore, conventionally, in dynamic TDD (Dynamic TDD), resources used for performing RRM measurements of neighboring cells cannot be utilized for transmission of UL data and reception of DL data.

[0033] Furthermore, conventionally, in URLLC, even if it was necessary to send UL data and receive DL data with low latency, resources for performing RRM measurements of neighboring cells could not be utilized.

[0034] The present disclosure has been made to solve the above-mentioned problems. Hereinafter, one embodiment of the present disclosure will be described using the drawings.

[0035] [Structure of wireless communication system]

[0036] The wireless communication system according to this embodiment includes a base station 10 (see Figure 1 ) and terminal 20 (reference Figure 2 ). The base station 10 transmits a DL signal to the terminal 20. In addition, the base station 10 receives a UL signal transmitted from the terminal 20. The terminal 20 receives the DL signal transmitted from the base station 10, and transmits a UL signal to the base station 10.

[0037] [Structure of Base Station 10]

[0038] Figure 1 1 is a block diagram showing a configuration example of a base station 10 according to the present embodiment. The base station 10 includes, for example, a control unit 101 , a transmission unit 102 , and a reception unit 103 .

[0039] The control unit 101 controls the transmission process in the transmission unit 102 and the reception process in the reception unit 103 .

[0040] For example, the control unit 101 schedules DL data signals sent through PDSCH and DL control signals sent through PDCCH (e.g., resource allocation). In addition, the control unit 101 schedules DL reference signals such as synchronization signals (PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)), CRS, and CSI-RS.

[0041] Furthermore, the control unit 101 performs scheduling of a UL data signal transmitted through the PUSCH, a UL control signal transmitted through the PUCCH, a random access preamble transmitted through the PRACH, a UL reference signal, and the like.

[0042] Furthermore, the control unit 101 performs connection cell selection and the like of the terminal 20 based on an RRM report (RRM report) included in the UL signal and indicating a measurement result of reception quality.

[0043] The transmission unit 102 transmits a signal (DL signal) addressed to the terminal 20 under the control of the control unit 101 .

[0044] The DL signal includes, for example, DL data (for example, sometimes also referred to as a PDSCH signal), a DL control signal (for example, sometimes also referred to as a PDCCH signal, PDCCH includes DCI (Downlink Control Information)), or a reference signal. The DL control information includes, for example, an RA message containing a TA (Timing Advance) instruction (for example, sometimes also referred to as an RAR (Random Access Response) or message 2), and information indicating UL resource settings (scheduling instructions).

[0045] In addition, the DL control information may be notified to the terminal 20 through, for example, higher layer signaling, or may be notified to the terminal 20 through dynamic signaling such as DCI. The higher layer signaling may be referred to as, for example, RRC (Radio Resource Control) signaling or higher layer parameters.

[0046] The receiving unit 103 receives a signal (UL signal) transmitted from the terminal 20 under the control of the control unit 101 .

[0047] The UL signal includes, for example, UL data (eg, sometimes referred to as a PUSCH signal), UL control information (eg, sometimes referred to as a PUCCH signal), a reference signal (eg, an SRS), or an RA signal. In addition, there are also cases where the UL signal includes an RRM report.

[0048] [Structure of Terminal 20]

[0049] Figure 2 2 is a block diagram showing an example of the configuration of the terminal 20 according to the present embodiment. The terminal 20 includes, for example, a control unit 201 , a transmission unit 202 , a reception unit 203 , and a measurement unit 204 .

[0050] The control unit 201 controls, for example, the transmission process in the transmission unit 202 and the reception process in the reception unit 203 .

[0051] For example, when receiving a scheduling instruction from the base station 20, the control unit 201 controls whether the RRM measurement operation or the scheduling operation is performed preferentially in the target resource according to whether the scheduling operation priority criterion is satisfied (hereinafter referred to as "priority control").

[0052] The transmission unit 202 transmits the UL signal to the base station 10 under the control of the control unit 201. For example, when receiving the UL scheduling instruction from the control unit 201, the transmission unit 202 also receives the UL signal in the target resource.

[0053] The receiving unit 203 receives the DL signal transmitted from the base station 10 under the control of the control unit 201. For example, when receiving the DL scheduling instruction from the control unit 201, the receiving unit 203 also receives the DL signal in the target resource.

[0054] The measurement unit 204 measures the reception quality of the signal received in the receiving unit 203 in the target resource when receiving the RRM measurement instruction from the control unit 201. The values ​​indicating the reception quality include the received power of the received signal (e.g., RSRP (Reference Signal Received Power)), the received signal strength (e.g., RSSI (Received Signal Strength Indicator)), the reception quality (e.g., Reference Signal Received Quality), etc. The RRM report may also be sent from the sending unit 202 to the base station 10.

[0055] [Priority Control]

[0056] Next, an example of priority control in the terminal 20 (control unit 201 ) will be described.

[0057] <Example 1>

[0058] Example 1 uses the UL capability of the terminal supporting the scheduling operation priority as the basis for the scheduling operation priority.

[0059] In this example, the terminal 20 supporting the UE capability of giving priority to the scheduling operation cancels the RRM measurement operation in the object resource and performs the scheduling operation, that is, gives priority to the scheduling operation, when receiving the scheduling (DL scheduling or UL scheduling) instruction from the base station 10. On the other hand, the terminal 20 not supporting the UE capability of giving priority to the scheduling operation performs the RRM measurement operation in the object resource even when receiving the scheduling instruction from the base station 10.

[0060] Here, the UE capability of scheduling operation priority is a function capable of dynamically canceling the RRM measurement operation.

[0061] In addition, the UE capability of scheduling operation priority can be set by this function alone, or it can be associated with its function associated with dynamic TDD or URLLC.

[0062] <Example 2>

[0063] In Example 2, the case where the terminal 20 receives an instruction to give priority to the scheduling operation from the base station 10 is used as a criterion for giving priority to the scheduling operation.

[0064] In this example, the terminal 20 that has received the instruction to give priority to the scheduling operation from the base station 10 cancels the RRM measurement operation and performs the scheduling operation in the target resource when the scheduling instruction is received from the base station 10. On the other hand, the terminal 20 that has not received the instruction to give priority to the scheduling operation from the base station 10 performs the RRM measurement operation in the target resource even when the scheduling instruction is received from the base station 10.

[0065] Here, the instruction to prioritize the scheduling operation from the base station 10 may be notified to the terminal 20 through RRC signaling, MAC CE (MAC Control Element) or DCI.

[0066] <Example 3>

[0067] In Example 3, the criterion for giving priority to the scheduling operation is that the terminal 20 supports the UE capability of giving priority to the scheduling operation and receives an instruction for giving priority to the scheduling operation from the base station 10 .

[0068] In this example, the terminal 20 that supports the UE capability of giving priority to the scheduling operation and has received the instruction of giving priority to the scheduling operation from the base station 10 cancels the RRM measurement operation and performs the scheduling operation in the target resource when the scheduling instruction is received. On the other hand, the terminal 20 that does not support the UE capability of giving priority to the scheduling operation or has not received the instruction of giving priority to the scheduling operation from the base station 10 performs the RRM measurement operation in the target resource even when the scheduling instruction is received from the base station 10.

[0069] In addition, in each of the above examples, it can also be set that the terminal 20 that meets the benchmark for scheduling operation priority can semi-statically or dynamically switch whether to prioritize the RRM measurement operation or the scheduling operation. In the case of semi-static switching, specifically, after receiving a notification from the base station 10, the terminal 20 prioritizes the scheduling operation before a specific period has passed, and prioritizes the RRM measurement operation after a specific period has passed or when a specific condition is met without receiving a notification from the base station 10. As the above-mentioned specific conditions, for example, the following cases can be cited: when a specific time has passed since the RRM measurement operation was canceled and the scheduling operation was last performed, or when the conditions for event triggering reporting are met in the reception quality measurement results, etc. In addition, in the case of dynamic switching, specifically, the following cases can be cited: after the terminal 20 receives a notification from the base station 10 to prioritize the scheduling operation, the terminal 20 prioritizes the scheduling operation until it receives a notification from the base station 10 to prioritize the RRM measurement operation, etc.

[0070] Furthermore, even if the terminal 20 satisfies the criteria for scheduling operation priority, it performs the RRM measurement operation in the target resource when it does not receive a scheduling instruction from the base station 10 .

[0071] <Effect>

[0072] As described above, in this embodiment, even when scheduling restrictions occur in the past, the RRM measurement operation can be dynamically canceled and the scheduling operation can be performed. Therefore, according to this embodiment, resources can be used dynamically and flexibly, and low-latency applications can be supported.

[0073] In addition, since the specifications of Rel-15 have been fixed, the only part that can be changed after Rel-16 is the operation of some terminals. However, according to this embodiment, since the RRM measurement operation can be dynamically canceled for some terminals identified by the base station, it can be easily implemented after Rel-16.

[0074] In addition, when the RRM measurement operation is dynamically canceled, there is an influence such as a delay in reporting the measurement result or a decrease in the accuracy of the measurement result. However, if the cancellation of the RRM measurement operation is short-term, it will not be a big problem for the system.

[0075] [change]

[0076] Hereinafter, a variation of the priority control according to the present embodiment will be described.

[0077] <Change 1>

[0078] In this embodiment, in DL scheduling, the condition that the time interval from the reception of the scheduling DCI to the target resource is equal to or larger than a specific threshold is used as an additional condition for canceling the RRM measurement operation.

[0079] For example, the terminal 10 may also cancel the RRM measurement operation based on DL scheduling when the above-mentioned scheduling operation priority criteria are met and the time interval from the reception of the scheduling DCI to the target resource is greater than a specific threshold. On the other hand, when the DL scheduling conflicts with the target resource, that is, when the time interval from the reception of the scheduling DCI to the target resource is less than a specific threshold and DL scheduling is performed, the terminal 20 prioritizes the RRM measurement operation even if the above-mentioned scheduling operation priority criteria are met.

[0080] In addition, the above-mentioned specific threshold value may be defined in the specification, or may be notified from the base station 10 to the terminal 20 as information on the minimum time interval that can be supported by the UE capability.

[0081] <Change 2>

[0082] In this embodiment, the terminal 20 may also control whether to cancel the RRM measurement operation caused by the scheduling instruction according to the object of the RRM measurement operation.

[0083] For example, the terminal 20 may perform control so as not to cancel the RRM measurement operation for the SSB of the serving cell but to cancel the RRM measurement operation for the CSI-RS of the serving cell and the SSB / CSI-RS of the neighboring cells.

[0084] like Figure 3 As shown, when the transmission period and transmission start timing of SSB301 of the serving cell and SSB302 of the surrounding cell are the same, and SSB301 is shorter than SSB302, the width of SMTC window 303 is set according to the length of SSB302. In this case, in variation 2, terminal 20 performs the RRM measurement operation in interval 304 of receiving SSB301, cancels the RRM measurement operation in interval 305 of not receiving SSB301 but only receiving SSB302, and performs the scheduling operation.

[0085] In addition, if Figure 4 As shown, when the transmission period of SSB401 of the service cell is longer than the transmission period of SSB402 of the surrounding cell, the terminal 20 performs RRM measurement operation in the interval 405 of the SMTC window 403 for setting SSB401, and cancels the RRM measurement operation in the interval 406 of not receiving SSB401 and only setting the SMTC window 404 for SSB402, and performs scheduling operation.

[0086] <Change 3>

[0087] In this embodiment, whether or not the RRM measurement operation caused by the scheduling instruction can be canceled or the cancellation method is different depending on whether it is outside or inside the measurement gap.

[0088] For example, in the case of outside the measurement gap, the case where the above-mentioned benchmark for scheduling operation priority is met is used as a condition for canceling the RRM measurement operation. On the other hand, in the case of within the measurement gap (when measuring at different frequencies), in addition to the case where the above-mentioned benchmark for scheduling operation priority is met, the conditions for canceling the RRM measurement operation include receiving the scheduling DCI before opening the measurement gap, opening a time corresponding to the RF retuning between the scheduling DCI and the target resource, etc. Alternatively, it can also be set that in the case of within the measurement gap, the RRM measurement operation is always given priority, and in the case of outside the measurement, the RRM measurement operation is canceled and the scheduling operation is performed.

[0089] <Change 4>

[0090] In this embodiment, the terminal 20 may also cancel the RRM measurement operation in a specific CC based on the scheduling instructions in other CCs during CA.

[0091] In inter-band CA using CCs of different bands, whether the RRM measurement operation in other bands is canceled according to scheduling to CCs in a specific band may be fixed in the specification regardless of the band combination, or may vary according to the band combination (UE capability).

[0092] The embodiments of the present disclosure have been described above.

[0093] (Hardware Structure)

[0094] In addition, the block diagram used in the description of the above-mentioned embodiment represents a block of a functional unit. These functional blocks (constituent units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can also be implemented using one device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, with wired, wireless, etc.) connected and implemented 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.

[0095] Functions include judging, determining, judging, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that plays a sending role can also be called a transmitting unit or a transmitter. As mentioned above, no matter which one, the implementation method is not particularly limited.

[0096] For example, a base station, a user terminal, etc. 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 51 is a diagram showing an example of the hardware configuration of a base station 10 and a terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above can be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0097] In the following description, the word "device" can be replaced by circuit, equipment, 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 figure, or may exclude some of the devices.

[0098] The functions in the base station 10 and the terminal 20 are implemented, for example, as follows: by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, the processor 1001 performs calculations and controls communication based on the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0099] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, etc. For example, the control units 101, 201, etc. described above may also be implemented by the processor 1001.

[0100] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that enables a computer to perform at least a part of the operations described in the above embodiment is used. For example, the control units 101 and 201 of the base station 10 and the terminal 20 can be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and other functional blocks can also be implemented in the same way. The key points that the above-mentioned various processes are performed by one processor 1001 have been described, but they can also be performed simultaneously or successively by more than two processors 1001. The processor 1001 can also be implemented by more than one chip. In addition, the program can also be sent from the network via an electrical communication line.

[0101] The memory 1002 is a computer-readable recording medium, and may be composed of at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store an executable program (program code), a software module, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0102] The storage 1003 is a computer-readable recording medium, and may be composed of at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (such as a compact disc, a digital versatile disk, a Blu-ray (registered trademark) disc), a smart card, a flash memory (such as a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc. The storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned storage medium may also be, for example, a database, a server, or other appropriate medium including at least one of the memory 1002 and the storage 1003.

[0103] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., for example, in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). For example, the above-mentioned transmitting units 102, 202, receiving units 103, 203, measuring unit 204, etc. may also be realized by the communication device 1004.

[0104] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that performs output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0105] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for information communication. The bus 1007 may be configured by a single bus or may be configured by different buses for each device.

[0106] In addition, the base station 10 and the terminal 20 may include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and may also use the hardware to implement a part or all of each functional block. For example, the processor 1001 may be implemented using at least one of these hardware.

[0107] (Information notification, signaling)

[0108] The notification of information is not limited to the method / 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 (Master Information Block (MIB (Master Information Block)), System Information Block (SIB (System Information Block))), other signals or a combination thereof. In addition, RRC signaling may be referred to as an RRC message, for example, it may also be an RRC Connection Setup (RRC Connection Setup) message, an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message, etc.

[0109] (Application System)

[0110] The various methods / implementations described in the present disclosure may also be applied to at least one of systems utilizing 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-WideBand), Bluetooth (registered trademark), other appropriate systems, and next-generation systems expanded therefrom. In addition, multiple systems can also be combined and applied (for example, a combination of at least one of LTE and LTE-A and 5G, etc.).

[0111] (Processing process, etc.)

[0112] The processing procedures, timings, flow charts, etc. of each method / implementation described in this disclosure may be reversed in order as long as there is no contradiction. For example, regarding the method described in this disclosure, the elements of various steps are presented in an illustrative order, and are not limited to the specific order presented.

[0113] (Base Station Operation)

[0114] In the present disclosure, a specific operation is performed by a base station, and sometimes it is performed by its upper node according to the situation. In a network composed of one or more network nodes having a base station, various operations performed for communication with a terminal can obviously be performed by at least one of the base station and other network nodes other than the base station (for example, consider MME or S-GW, etc., but not limited to this). In the above, the case where there is one other network node other than the base station is illustrated, but it can also be a combination of multiple other network nodes (for example, MME and S-GW).

[0115] (Direction of input and output)

[0116] Information and signals may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input and output via a plurality of network nodes.

[0117] (Processing of input and output information, etc.)

[0118] The input and output information can be stored in a specific area (e.g., memory) or managed using a management table. The input and output information can be overwritten, updated, or added. The output information can also be deleted. The input information can also be sent to other devices.

[0119] (Judgment method)

[0120] The determination may be made using a value represented by 1 bit (0 or 1), a true or false value (Boolean value (true or false)), or a comparison of numerical values ​​(for example, comparison with a specific value).

[0121] (software)

[0122] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be construed broadly to mean instructions, instruction sets, codes, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, procedures, functions, etc.

[0123] In addition, software, instructions, information, etc. may be sent and received via a transmission medium. For example, when the software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, optical cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technologies and wireless technologies is included in the definition of transmission medium.

[0124] (Information, signal)

[0125] Information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, code elements, and chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0126] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may also be a signal (signaling). In addition, a signal may also be a message. In addition, a component carrier (CC) may also be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0127] (“System”, “Network”)

[0128] The terms "system" and "network" used in this disclosure may be used interchangeably.

[0129] (parameters, channel name)

[0130] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0131] The names used for the above parameters are not restrictive names at all. Furthermore, there are cases where the mathematical formulas using these parameters are different from the mathematical formulas explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by all appropriate names, and thus the various names assigned to these various channels and information elements are not restrictive names at all.

[0132] (Base Station)

[0133] In the present disclosure, the terms "base station (BS)," "wireless base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier" and the like are used interchangeably. Base stations are sometimes also referred to as macrocells, small cells, femtocells, picocells and the like.

[0134] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or all of the coverage area of ​​at least one of a base station and a base station subsystem that provide communication services within the coverage area.

[0135] (terminal)

[0136] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0137] Mobile stations are sometimes also referred to by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handheld devices, user agents, mobile clients, clients or some other appropriate terms.

[0138] (Base station / Mobile station)

[0139] 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 also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an automatic 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 also be an IoT (Internet of Things) device such as a sensor.

[0140] In addition, the base station in the present disclosure can be replaced by a user terminal. For example, for a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it can also be called device-to-device (D2D (Device-to-Device)), vehicle-to-everything (V2X (Vehicle-to-Everything)), etc.), the various methods / implementations of the present disclosure can also be applied. In this case, it can be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" can be replaced by words corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. can also be replaced by side channels.

[0141] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0142] (Meaning and explanation of terms)

[0143] The terms "determining" and "determining" used in this specification sometimes include a variety of operations. For example, "determining" and "determining" may include situations where judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (for example, searching in a table, database or other data structure), ascertaining, etc. are considered to be situations where "determining" and "determining" are performed. In addition, "determining" and "determining" may include situations where receiving (for example, receiving information), transmitting (for example, transmitting information), inputting, outputting, accessing (for example, accessing data in a memory) are considered to be situations where "determining" and "determining" are performed. In addition, "determining" and "determining" may include situations where resolving, selecting, choosing, establishing, comparing, etc. are considered to be situations where "determining" and "determining" are performed. That is, "determining" and "determining" may include situations where certain operations are considered to be situations where "determining" and "determining" are performed. In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and the like.

[0144] The terms "connected", "coupled", etc., or all their variations, mean all direct or indirect connections or combinations between two or more elements, and can include situations where there are 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 physical, logical, or a combination thereof. For example, "connect" can also be replaced by "access". In the context of use in the present disclosure, it is possible to consider two elements being "connected" or "coupled" to each other by using at least one of one or more wires, cables, and printed electrical connections, and as several non-limiting and non-exhaustive examples, it is possible to consider being "connected" or "coupled" to each other by using electromagnetic energy with wavelengths in the wireless frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0145] The reference signal can also be referred to as RS (Reference Signal) for short, and may also be referred to as a pilot according to an applied standard.

[0146] The phrase “based on” used in the present disclosure does not mean “based only on” unless explicitly described otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0147] Any reference to an element using the designations "first," "second," etc., used in this disclosure is not intended to be a comprehensive limitation on the number or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements may be used or that the first element must be located before the second element in some form.

[0148] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section”, “circuit”, “device” or the like.

[0149] When the terms "include", "including" and their variations are used in the present disclosure, these terms are intended to be inclusive like the term "comprising". Further, the term "or" used in the present disclosure does not mean a logical exclusive OR.

[0150] A radio frame may also be composed of one or more frames in the time domain. One or more individual frames in the time domain may also be referred to as subframes. A subframe may also be further composed of one or more time slots in the time domain. A subframe may be a fixed duration (e.g., 1 ms) that is independent of a parameter set (numerology).

[0151] A parameter set may also refer to a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. A parameter set may also represent, for example, at least one of a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (transmission time interval (TTI)), the number of symbols per TTI, a wireless frame structure, a specific filtering process performed by a transmitter and receiver in the frequency domain, a specific windowing process performed by a transmitter and receiver in the time domain, and the like.

[0152] A time slot may also be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing)) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access)) symbols, etc.) in the time domain. A time slot may be a time unit based on a parameter set.

[0153] A time slot may contain multiple mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. Compared to a time slot, a mini-slot may also be composed of a smaller number of symbols. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (or PUSCH) mapping type B.

[0154] A radio frame, a subframe, a time slot, a mini-time slot, and a symbol all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by other names corresponding to each other.

[0155] For example, one subframe may also be referred to as a transmission time interval (TTI), multiple consecutive subframes may also be referred to as TTI, and one time slot or one mini time slot may also be referred to as TTI. That is, at least one of the subframe and the TTI may be a subframe (1ms) in the existing LTE, or a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. In addition, the unit representing the TTI may also be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0156] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in units of TTI. In addition, the definition of TTI is not limited to this.

[0157] TTI can be a transmission time unit for data packets (transport blocks), code blocks, code words, etc. after channel coding, and can also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (for example, the number of symbols) to which the transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0158] In addition, when 1 time slot or 1 mini time slot is called TTI, more than 1 TTI (i.e., more than 1 time slot or more than 1 mini time slot) can be the minimum time unit of scheduling. In addition, the number of time slots (number of mini time slots) constituting the minimum time unit of scheduling can be controlled.

[0159] A TTI with a duration of 1 ms may also 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 also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-time slot, a sub-time slot, a time slot, etc.

[0160] In addition, long TTI (e.g., normal TTI, subframe, etc.) can also be replaced by a TTI with a duration exceeding 1 ms, and short TTI (e.g., shortened TTI, etc.) can also be replaced by a TTI with a TTI length less than that of long TTI and greater than 1 ms.

[0161] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it may also include one or more consecutive subcarriers (subcarriers). The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0162] In addition, the time domain of an RB may also include one or more symbols, and may be the length of one slot, one mini slot, one subframe, or one TTI. One TTI, one subframe, etc. may also be composed of one or more resource blocks, respectively.

[0163] 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, and the like.

[0164] In addition, 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.

[0165] A bandwidth part (BWP) (also referred to as a partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs may also be identified by indexing the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and assigned numbers within the BWP.

[0166] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0167] At least one of the configured BWPs may be activated, and the UE may not assume that a specific signal / channel is sent or received outside the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced with "BWP".

[0168] The structures of the above-mentioned radio frames, subframes, time slots, mini-time slots, and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP: Cyclic Prefix) length can be variously changed.

[0169] In the present disclosure, when articles such as a, an, and the in English are added by translation, the present disclosure includes the case where the noun following these articles is in plural form.

[0170] (Changes in methods, etc.)

[0171] The various methods / implementations described in this disclosure may be used alone, in combination, or switched along with execution. In addition, notification of specific information (e.g., notification of "is X") is not limited to explicit notification, but may also be performed implicitly (e.g., by not notifying the specific information).

[0172] The present disclosure is described in detail above, but it is obvious to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as a modification and variation without departing from the purpose and scope of the present disclosure determined by the description of the claims. Therefore, the description of the present disclosure is for the purpose of exemplary description and does not bring any restrictive meaning to the present disclosure.

[0173] Industrial Applicability

[0174] An aspect of the present disclosure is useful in a wireless communication system.

[0175] Description of symbols

[0176] 10 Base Station

[0177] 20 Terminal

[0178] 101, 201 control unit

[0179] 102, 202 Sending unit

[0180] 103, 203 Receiving unit

[0181] 204 measurement units

Claims

1. A terminal having: a control unit that controls, upon receiving a scheduling instruction from a base station, whether a scheduling operation priority criterion is satisfied, whether an RRM measurement operation or a scheduling operation is preferentially performed in a target resource of an SMTC window or a measurement gap; and a transmitting and receiving unit, which performs downlink reception or uplink transmission in the object resource in a case where the scheduling operation is given priority, The scheduling operation priority is based on at least one of: a UE capability of the terminal supporting the scheduling operation priority and the terminal receiving a semi-static scheduling operation priority instruction from the base station. The control unit cancels the RRM measurement operation in the target resource and performs the scheduling operation when a scheduling instruction is received from the base station when the scheduling operation priority criterion is satisfied, and performs the RRM measurement operation in the target resource when no scheduling instruction is received from the base station, When the scheduling operation priority criterion is not satisfied, the control unit performs the RRM measurement operation on the target resource even if a scheduling instruction is received from the base station.

2. A communication method, wherein: When a scheduling instruction is received from the base station, the priority of the RRM measurement operation and the scheduling operation in the target resource of the SMTC window or the measurement gap is controlled according to whether the scheduling operation priority criterion is satisfied. In the case of giving priority to the scheduling operation, downlink reception or uplink transmission is performed in the object resource, In the case of giving priority to the RRM measurement operation, measuring the reception quality in the object resource, The scheduling operation priority criteria include: at least one of the UE capability of the terminal supporting the scheduling operation priority and the terminal receiving a semi-static scheduling operation priority instruction from the base station. When the scheduling operation priority criterion is satisfied, when a scheduling instruction is received from the base station, the RRM measurement operation is canceled in the target resource and the scheduling operation is performed; when no scheduling instruction is received from the base station, the RRM measurement operation is performed in the target resource, When the criterion for giving priority to the scheduling operation is not satisfied, the RRM measurement operation is performed on the target resource even when a scheduling instruction is received from the base station.

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