CN115176494A - Terminal and communication method - Google Patents

Abstract

The terminal has: a reception unit that receives a setting relating to measurement from a base station; a control unit that performs measurement using an SMTC (SS/PBCH block measurement timing Configuration) window determined based on the setting relating to the measurement; and a transmission unit configured to transmit a result of the measurement performed to the base station, wherein the control unit sets adjacent small gaps at a head and a tail of the SMTC window based on the setting related to the measurement.

Description

Terminal and communication method

Technical Field

The present invention relates to a terminal and a communication method in a wireless communication system.

Background

In New Radio (NR) (also referred to as "5G") which is a system following Long Term Evolution (LTE), a technology that satisfies a large capacity system, a high data transmission rate, a low delay, simultaneous connection of many terminals, a low cost, power saving, and the like as requirements is being studied (for example, non-patent document 1).

In the LTE wireless communication system, when a terminal corresponding to carrier aggregation using a plurality of frequency bands is realized by one RF circuit, it is necessary to set a measurement gap for performing different frequency measurements. The length of the measurement gap in the prior art is typically set to 6ms, during which the terminal cannot receive downlink data. Further, if a period for Hybrid Automatic Repeat Request (HARQ) feedback of ACK/NACK transmitted 4ms later with respect to data to be transmitted is secured, the period 4ms before the measurement gap cannot be substantially applied to transmission of downlink data. There is a period in which uplink data is similarly unavailable, and for example, in the case of Frequency Division Duplex (FDD), the terminal cannot transmit uplink data during a period of 6ms from the measurement gap and during a period of 1ms after the measurement gap.

As one method for shortening the period of inability to transmit as described above, in the LTE wireless communication system, a Small Gap (NCSG) Controlled by a Network is introduced as a Small Gap shorter than the conventional period (for example, non-patent document 2). In the measurement using the small gap, for example, the terminal interrupts communication with the base station in order to measure another cell to be a target of inter-frequency measurement (inter-frequency measurement) by setting the first and last 2 subframes in the existing measurement gap as the small gap period, and performs preparation processing for inter-frequency measurement such as adjustment of an RF circuit. In the subframe sandwiched by the 2 subframes, different frequency measurements are performed and downlink data is received from the base station.

Documents of the prior art

Non-patent document

Non-patent document 1:3GPP TS 38.300V15.8.0 (2019-12)

Non-patent document 2:3GPP TS 36.133V15.9.0 (2019-12)

Disclosure of Invention

Problems to be solved by the invention

It is required that the small gap period is flexibly set by the terminal according to a difference or a degree of separation of the band width between the cell where the terminal is located and the cell of the measurement target, the capability of the RF circuit of the terminal, and the like.

The present invention has been made in view of the above-described circumstances, and an object thereof is to perform measurement using an appropriate small gap in a wireless communication system.

Means for solving the problems

According to the disclosed technology, there is provided a terminal having: a reception unit that receives a setting relating to measurement from a base station; a control unit that performs Measurement using an SMTC (SS/PBCH block Measurement Timing Configuration) window determined based on the setting relating to the Measurement; and a transmission unit configured to transmit a result of the measurement performed to the base station, wherein the control unit sets small gaps adjacent to each other at the beginning and end of the SMTC window based on the setting related to the measurement.

Effects of the invention

According to the disclosed technology, in a wireless communication system, a terminal can perform measurement using an appropriate small gap.

Drawings

Fig. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention.

Fig. 2 is a timing chart for explaining an operation example of the embodiment of the present invention.

Fig. 3 is a diagram showing an example of setting parameters of the SMTC window.

Fig. 4 is a diagram showing an example (1) of a small gap according to the embodiment of the present invention.

Fig. 5 is a diagram showing an example (2) of a small gap according to the embodiment of the present invention.

Fig. 6 shows a specification modification (1) according to an operation example of the embodiment of the present invention.

Fig. 7 shows a specification modification (2) according to an operation example of the embodiment of the present invention.

Fig. 8 shows a specification modification (3) according to an operation example of the embodiment of the present invention.

Fig. 9 shows a specification modification (4) according to an operation example of the embodiment of the present invention.

Fig. 10 is a diagram showing an example of a functional configuration of the base station 10 according to the embodiment of the present invention.

Fig. 11 is a diagram showing an example of a functional configuration of the terminal 20 according to the embodiment of the present invention.

Fig. 12 is a diagram showing an example of a hardware configuration of the base station 10 or the terminal 20 according to the embodiment of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to the embodiments described below.

In the operation of the wireless communication system of the embodiment of the present invention, the related art can be suitably used. However, the existing technology is, for example, existing LTE, but is not limited to existing LTE. In addition, the term "LTE" used in the present specification has a broad meaning including LTE-Advanced and modes after LTE-Advanced (e.g., NR), unless otherwise specified.

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), PUSCH (Physical Uplink Shared Channel), and the like, which are used in the conventional LTE, are used. These are for convenience of description, and the same signals, functions, and the like as those described above may be referred to by other names. In addition, the above-mentioned term in NR corresponds to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, NR-PDCCH, NR-PDSCH, NR-PUCCH, NR-PUSCH, etc. However, even a signal used for NR is not necessarily written as "NR-".

In the embodiment of the present invention, the Duplex (Duplex) mode may be a TDD (Time Division Duplex) mode, an FDD (Frequency Division Duplex) mode, or other modes (for example, a Flexible Duplex (Flexible Duplex) mode).

In the embodiment of the present invention, the "configured (configuration)" radio parameters and the like may be predetermined (Pre-configuration) specific values, or may be radio parameters notified from the base station 10 or the terminal 20.

Fig. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention. As shown in fig. 1, the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20. In fig. 1, one base station 10 and one terminal 20 are shown, but this is an example and a plurality of base stations may be provided.

The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a radio signal are defined by the time domain and the frequency domain, the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signals are for example NR-PSS and NR-SSS. The system information is transmitted, for example, by the NR-PBCH, also referred to as report information. As shown in fig. 1, base station 10 transmits a control signal or data to terminal 20 via DL (Downlink) and receives a control signal or data from terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. Both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to the DL or UL. The base station 10 and the terminal 20 may communicate via an SCell (Secondary Cell) and a PCell (Primary Cell) by CA (Carrier Aggregation).

The terminal 20 is a communication device having a wireless communication function, such as a smartphone, a mobile phone, a tablet computer, a wearable terminal, and a communication module for M2M (Machine-to-Machine) use. As shown in fig. 1, the terminal 20 receives a control signal or data from the base station 10 through DL and transmits the control signal or data to the base station 10 through UL, thereby utilizing various communication services provided by the wireless communication system.

As described above, NCSG (Network Controlled Small Gap) is introduced for LTE. In the NCSG, a transmission/reception interruption of a short period (for example, 1ms or 2 ms) occurs at the beginning and end of a measurement gap (for example, 6 ms) before the NCSG is introduced, and data scheduling can be performed in the remaining period. This transmission/reception interruption period may also be referred to as a small gap.

Here, when a small gap by NCSG is introduced as a Measurement gap setting in NR similarly to LTE, SMTC (SSB (SS/PBCH block: SS/PBCH block) Measurement Timing Configuration) is defined for NR Measurement, and therefore a method different from LTE is assumed. SMTC is information for the terminal 20 to measure the time domain of SSB. The small gap may also be expressed as "break duration" or "interruption".

Fig. 2 is a timing chart for explaining an operation example in the embodiment of the present invention. Measurement using SMTC and a small gap in NR will be described with reference to fig. 2.

In step S1, the base station 10 transmits "rrcreeconfiguration" or "RRCResume" as an RRC (Radio Resource Control) message to the terminal 20. "rrcreeconfiguration" is an RRC message for changing RRC connection. RRCResume "is an RRC message for performing recovery of the temporarily suspended RRC connection. The "rrcreconfigurable" or "rrcreesu" may also contain an information element "MeasObjectNR" of the setting involved in the measurement.

"MeasObjectNR" includes Information for measurement using SSB or CSI-RS (Channel State Information-Reference Signal), and includes an Information element "SSB-MTC" and an Information element "SSB-MTC2" involved in setting of a window for measuring SSB, i.e., SMTC.

Fig. 3 is a diagram showing an example of setting parameters of the SMTC window. As shown in fig. 3, "SSB-MTC" specifies the period, offset, and duration of the SMTC window. For example, the period of the SMTC window can set 5 subframes, 10 subframes, 20 subframes, 40 subframes, 80 subframes, or 160 subframes. For example, the period of the SMTC window may be set to 1 subframe, 2 subframes, 3 subframes, 4 subframes, or 5 subframes.

In addition, as shown in fig. 3, "SSB-MTC2" has a list of physical cell IDs. In 1 cycle set by "SSB-MTC", the timing of measurement of the SSB corresponding to each physical cell ID in the list is specified by "periodicity". The "periodicity" can specify, for example, 5 subframes, 10 subframes, 20 subframes, 40 subframes, or 80 subframes.

Fig. 4 is a diagram showing an example (1) of a small gap according to the embodiment of the present invention. An example in which adjacent small gaps are arranged before and after the SMTC window as part of the setting of the SMTC will be described with reference to fig. 4.

As shown in fig. 4, for example, a small gap period of 2 subframe lengths may be set before and after the SMTC window of 5 subframe lengths. The small gap period may have a length of 1 subframe, or may be set to a period shorter than 1 subframe. The SMTC window may also be other than 5 subframes long. In addition, 1 subframe may be 1ms.

Hereinafter, the "small gap in front of the SMTC window" may be a small gap on the outer side in front of the SMTC window as shown in fig. 4, and the "small gap behind the SMTC window" may be a small gap on the outer side behind the SMTC window as shown in fig. 4.

Fig. 5 is a diagram showing an example (2) of a small gap in the embodiment of the present invention. Another example in which adjacent small gaps are arranged before and after the SMTC window as part of the setting of the SMTC will be described with reference to fig. 5.

As shown in fig. 5, for example, a small gap period of 1 subframe length may be set before and after the inside of the SMTC window of 5 subframe lengths. The small gap period may have a length of 2 subframes, or may be set to a period shorter than 1 subframe. The SMTC window may also be other than 5 subframes long. In addition, 1 subframe may be 1ms.

Hereinafter, the "small gap in front of the SMTC window" may be a small gap in front of the inside of the SMTC window as shown in fig. 5, and the "small gap in back of the SMTC window" may be a small gap in back of the inside of the SMTC window as shown in fig. 5.

Fig. 6 shows a specification modification (1) according to an operation example in the embodiment of the present invention. The small gap set before and after the SMTC window shown in fig. 4 or 5 may also be set by "MeasObjectNR" shown in fig. 6. The "SMTC-intersection-r 16" contained in the "MeasObjectNR" specifies the same period in ms units at a small gap before and after the SMTC window. For example, the small gap period may be set to 0.625ms, 0.125ms, 0.25ms, 0.5ms, 1ms, or 2ms.

Fig. 7 shows a specification modification (2) according to an operation example in the embodiment of the present invention. As shown in fig. 7, the field "smtc1" contained in "MeasObjectNR" is used for setting the main measurement timing as described in fig. 3 by "SSB-MTC". In addition, the field "smtc2" included in the "MeasObjectNR" is used for setting the secondary measurement timing as described in fig. 3 by the "SSB-MTC2". In addition, the field "SMTC-interrupt" included in the "MeasObjectNR" is used for setting a small gap period before and after the SMTC window as described in fig. 6.

Fig. 8 shows a specification modification (3) according to an operation example in the embodiment of the present invention. The small gap set before and after the SMTC window shown in fig. 4 or 5 may also be set by "MeasObjectNR" shown in fig. 8. "SMTC-intersection 1-r16" contained in "MeasObjectNR" specifies the period of a small gap in front of the SMTC window in ms units. "SMTC-intersection 2-r16" contained in "MeasObjectNR" specifies the period of a small gap behind an SMTC window in ms units. For example, the small gap period may be set to 0.625ms, 0.125ms, 0.25ms, 0.5ms, 1ms, or 2ms.

Fig. 9 shows a specification modification (4) according to an operation example in the embodiment of the present invention. As shown in fig. 9, the field "smtc1" contained in "MeasObjectNR" is used for setting the main measurement timing as described in fig. 3 by "SSB-MTC". In addition, the field "smtc2" included in the "MeasObjectNR" is used for setting the secondary measurement timing as described in fig. 3 by the "SSB-MTC2". In addition, the field "SMTC-Interruption1" contained in the "MeasObjectNR" is used for setting a small gap period in front of the SMTC window as described in fig. 8. In addition, the field "SMTC-Interruption2" contained in the "MeasObjectNR" is used for setting a small gap period behind the SMTC window as described in fig. 8.

Note that, small gap periods before and after a plurality of SMTC windows may be set in advance, and the base station 10 may notify the terminal 20 of the small gap periods by assigning indexes to the small gap periods. In addition, the small gap period in front of the SMTC window and the small gap period behind the SMTC window may be set independently.

For example, the index may be set to "interrupt pattern ID", and the value "0" may be set as follows: the small gap period in front of the SMTC window is set to 1ms, and the small gap period behind the SMTC window is set to 2ms. For example, the value "1" may be set as follows: the small gap period in front of the SMTC window is set to 0.125ms, and the small gap period behind the SMTC window is set to 0.125ms.

Returning to fig. 2. In step S2, the terminal 20 performs measurement using the SMTC window and the small gap setting received in step S1. Then, the terminal 20 transmits the measurement result to the base station 10 via the RRC message "MeasurementReport".

According to the above-described embodiment, the terminal 20 can perform measurement using a small gap corresponding to the UE capability, the communication status, the state of the measurement target cell, or the like.

That is, in the wireless communication system, the terminal can perform measurement using an appropriate small gap.

(device Structure)

Next, a functional configuration example of the base station 10 and the terminal 20 that execute the processing and operation described so far will be described. The base station 10 and the terminal 20 include functions to implement the above-described embodiments. However, the base station 10 and the terminal 20 may have only a part of the functions in the embodiments.

< base station 10 >

Fig. 10 is a diagram showing an example of the functional configuration of the base station 10. As shown in fig. 10, base station 10 includes transmission section 110, reception section 120, setting section 130, and control section 140. The functional configuration shown in fig. 10 is merely an example. The functional distinction and the names of the functional units may be arbitrary as long as the operations according to the embodiment of the present invention can be performed.

The transmitting unit 110 includes the following functions: a signal to be transmitted to the terminal 20 side is generated and transmitted by radio. The receiving unit 120 includes the following functions: various signals transmitted from the terminal 20 are received, and from the received signals, information of higher layers, for example, is acquired. Further, transmission section 110 includes: a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signal, etc. to the terminal 20.

The setting unit 130 stores preset setting information and various setting information transmitted to the terminal 20 in a storage device, and reads the setting information from the storage device as necessary. The content of the setting information is, for example, a setting for measurement in the terminal 20.

As described in the embodiment, the control unit 140 determines to set the information of the measurement in the terminal 20. In addition, the control unit 140 performs setting for measurement at the terminal 20. The transmission section 110 may include the functional section related to signal transmission in the control section 140, and the reception section 120 may include the functional section related to signal reception in the control section 140.

< terminal 20 >

Fig. 11 is a diagram showing an example of the functional configuration of the terminal 20. As shown in fig. 11, terminal 20 includes transmitting section 210, receiving section 220, setting section 230, and control section 240. The functional configuration shown in fig. 11 is merely an example. The functional distinction and the name of the functional unit may be arbitrary as long as the operation according to the embodiment of the present invention can be performed.

Transmission section 210 creates a transmission signal from the transmission data and transmits the transmission signal by radio. Receiving section 220 performs wireless reception of various signals and acquires a signal of a higher layer from the received signal of the physical layer. In addition, receiving section 220 includes: a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, etc., transmitted from the base station 10. For example, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSCCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), and the like to other terminals 20 as D2D communication, and the receiving unit 220 receives PSCCH, PSDCH, PSBCH, or the like from other terminals 20.

The setting unit 230 stores various setting information received from the base station 10 or the terminal 20 via the receiving unit 220 in a storage device, and reads the setting information from the storage device as necessary. In addition, the setting unit 230 also stores preset setting information. The content of the setting information is, for example, a setting related to measurement in the terminal 20.

The control unit 240 performs the measurement set from the base station 10 and notifies the measurement result to the base station 10 as described in the embodiment. The functional unit related to signal transmission in control section 240 may be included in transmission section 210, and the functional unit related to signal reception in control section 240 may be included in reception section 220.

(hardware construction)

The block diagrams (fig. 10 and 11) used in the description of the above embodiment represent blocks in functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. The method of implementing each functional block is not particularly limited. That is, each functional block may be implemented by one apparatus that is physically or logically combined, or may be implemented by a plurality of apparatuses that are directly or indirectly (for example, by wire or wireless) connected to two or more apparatuses that are physically or logically separated. The functional blocks may also be implemented by combining one or more of the above-described devices with software.

The functions include, but are not limited to, judgment, determination, judgment, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, establishment, comparison, assumption, expectation, view, broadcast (broadcasting), notification (notification), communication (communicating), forwarding (forwarding), configuration (setting), reconfiguration (resetting), allocation (allocating, mapping), assignment (ordering), and the like. For example, a function block (a configuration unit) that realizes a transmission function may also be referred to as a transmission unit (transmitting unit) or a transmitter (transmitter). In any of the above, the method of implementation is not particularly limited.

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. Fig. 12 is a diagram showing an example of the hardware configuration of the base station 10 and the terminal 20 according to the embodiment of the present disclosure. The base station 10 and the terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following description, the term "device" may be replaced with a circuit, an apparatus, a unit, or the like. 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 not include some of the devices.

Each function of the base station 10 and the terminal 20 is realized by reading specific software (program) into hardware such as the processor 1001 and the storage device 1002, and performing calculation by the processor 1001 to control communication via the communication device 1004 or to control at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a Central Processing Unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, the control unit 140, the control unit 240, and the like described above may also be implemented by the processor 1001.

The processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes in accordance with the program (program code), the software module, the data, and the like. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments can be used. For example, the control unit 140 of the base station 10 shown in fig. 10 may also be implemented by a control program that is stored in the storage device 1002 and operated in the processor 1001. In addition, for example, the control unit 240 of the terminal 20 shown in fig. 11 may be realized by a control program that is stored in the storage device 1002 and operated in the processor 1001. The above-described various processes are described as being executed by one processor 1001, but may be executed simultaneously or sequentially by 2 or more processors 1001. The processor 1001 may also be mounted with more than 1 chip. Further, the program may be transmitted from a network via an electric communication line.

The storage device 1002 may be a computer-readable recording medium, and may be configured by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), and RAM (Random Access Memory). Storage 1002 may also be referred to as a register, a cache, a main memory (primary storage), etc. The storage device 1002 can store a program (program code), a software module, and the like that are executable to implement the communication method according to one embodiment of the present disclosure.

The auxiliary storage device 1003 may be a computer-readable recording medium, and may be configured with 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 Disc, a digital versatile Disc, a Blu-ray (registered trademark) Disc), a smart card (smart card), a flash memory (for example, a card, a stick, a key drive), a Floppy (registered trademark) disk, and a magnetic stripe. The storage medium may be, for example, a database including at least one of the storage device 1002 and the auxiliary storage device 1003, or other suitable medium such as a server.

The communication device 1004 is hardware (transmission/reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like, for example. Communication apparatus 1004 may be configured to include a high-Frequency switch, a duplexer, a filter, a Frequency synthesizer, and the like, in order to realize at least one of Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD). For example, a transmission/reception antenna, an amplifier unit, a transmission/reception unit, a transmission line interface, and the like may be implemented by the communication device 1004. The transmitting and receiving unit may also be installed by being physically or logically separated by the transmitting unit and the receiving unit.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, or the like) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

The processor 1001 and the storage device 1002 are connected to each other via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between the devices.

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), an FPGA (Field Programmable Gate Array), or the like, and a part or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may also be installed using at least one of these hardware.

(summary of the embodiment)

As described above, according to the embodiment of the present invention, there is provided a terminal including: a reception unit that receives a setting relating to measurement from a base station; a control unit that performs Measurement using an SMTC (SS/PBCH block Measurement Timing Configuration) window determined based on the setting relating to the Measurement; and a transmission unit configured to transmit a result of the measurement performed to the base station, wherein the control unit sets adjacent small gaps at a head and a tail of the SMTC window based on the setting related to the measurement.

According to the above configuration, the terminal 20 can perform measurement using a small gap corresponding to the UE capability, the communication status, the state of the measurement target cell, and the like. That is, in the wireless communication system, the terminal can perform measurement using an appropriate small gap.

The control unit may set small gaps outside the beginning and end of the SMTC window based on the setting related to the measurement. According to this configuration, the terminal 20 can perform measurement using a small gap corresponding to the UE capability, the communication status, the state of the measurement target cell, or the like.

The control unit may set small gaps at the head and end of the SMTC window based on the setting related to the measurement. According to this configuration, the terminal 20 can perform measurement using a small gap corresponding to the UE capability, the communication status, the state of the measurement target cell, or the like.

The control unit may set small gaps in the same adjacent period at the beginning and end of the SMTC window based on the setting for the measurement. According to this configuration, the terminal 20 can perform measurement using a small gap corresponding to the UE capability, the communication status, the state of the measurement target cell, or the like.

The control unit may set small gaps of adjacent different periods at the beginning and end of the SMTC window based on the setting relating to the measurement. According to this configuration, the terminal 20 can perform measurement using a small gap corresponding to the UE capability, the communication status, the state of the measurement target cell, or the like.

Further, according to an embodiment of the present invention, there is provided a communication method performed by a terminal: a reception process of receiving a setting relating to measurement from a base station; a control step of performing Measurement using an SMTC (SS/PBCH block Measurement Timing Configuration) window determined based on the setting relating to the Measurement; and a transmission process of transmitting a result of the measurement performed to the base station, the control process including: and a step of setting adjacent small gaps at the beginning and end of the SMTC window based on the setting relating to the measurement.

According to the above configuration, the terminal 20 can perform measurement using a small gap corresponding to the UE capability, the communication status, the state of the measurement target cell, and the like. That is, in the wireless communication system, the terminal can perform measurement using an appropriate small gap.

(supplement to embodiment)

While the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and various modifications, alternatives, and substitutions will be apparent to those skilled in the art. Although specific numerical examples are used to facilitate understanding of the present invention, unless otherwise specified, these numerical values are merely examples, and any appropriate values may be used. The item division in the above description is not essential to the present invention, and items described in 2 or more items may be used in combination as necessary, and items described in one item may be applied to items described in other items (as long as there is no contradiction). Boundaries of functional units or processing units in the functional block diagrams are not necessarily limited to corresponding physical component boundaries. Operations of a plurality of functional units may be performed by one physical component, or operations of one functional unit may be performed by a plurality of physical components. With respect to the processing procedures described in the embodiments, the order of processing may be changed as long as there is no contradiction. For convenience of description of the processing, the base station 10 and the terminal 20 have been described using functional block diagrams, but such devices may be realized by hardware, software, or a combination thereof. Software operated by a processor provided in the base station 10 according to the embodiment of the present invention and software operated by a processor provided in the terminal 20 according to the embodiment of the present invention may be stored in a Random Access Memory (RAM), a flash memory, a Read Only Memory (ROM), an EPROM, an EEPROM, a register, a hard disk (HDD), a removable disk, a CD-ROM, a database, a server, or any other suitable storage medium.

Note that the information notification is not limited to the embodiment and embodiment described in the present disclosure, and may be performed by using another method. For example, the Information may be notified by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, report Information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof).

The aspects/embodiments 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 (4 generation Mobile communication system: fourth generation Mobile communication system), 5G (5 generation Mobile communication system: fifth generation Mobile communication system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband: ultra Mobile Broadband), IEEE 802.11 (registered trademark), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), bluetooth (registered trademark), and other suitable systems based on which at least one of them is extended. In addition, a plurality of systems may be applied in combination (for example, a combination of 5G and at least one of LTE and LTE-a).

The order of processing procedures, sequences, flowcharts, and the like of the embodiments and the embodiments described in the present specification may be changed as long as they are not inconsistent with each other. For example, elements of various steps are presented in an exemplary order for methods described in this disclosure, and are not limited to the particular order presented.

In the present specification, it is assumed that the specific operation performed by the base station 10 is sometimes performed by its upper node (upper node) depending on the case. In a network formed of one or more network nodes (network nodes) having the base station 10, it is obvious that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and other network nodes (for example, considering MME, S-GW, or the like, but not limited thereto) other than the base station 10. The above description has exemplified the case where there is one network node other than the base station 10, but the other network node may be a combination of a plurality of other network nodes (e.g., MME and S-GW).

Information, signals, and the like described in the present disclosure 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.

The information to be input and output may be stored in a specific place (for example, a memory) or may be managed using a management table. The information to be input and output and the like may be overwritten, updated or added. The output information and the like may be deleted. The input information and the like may be transmitted to other devices.

The determination in the present disclosure may be made by a value (0 or 1) represented by 1 bit, may be made by a Boolean value (true or false), and may be made by comparison of numerical values (for example, comparison with a specific value).

For software, whether referred to as software (software), firmware (firmware), middleware (middle-ware), microcode (micro-code), hardware description language, or by other names, should be construed broadly as instructions, instruction sets, code (code), code segments (code segments), program code (program code), programs (program), subroutines (sub-program), software modules (software module), applications (application), software applications (software application), software packages (software packages), routines (routine), subroutines (subroutine), objects (object), executable files, threads of execution, processes, functions, and so forth.

In addition, software, instructions, information, and the like may be transmitted or received via a transmission medium. For example, where the software is transmitted from a website, server, or other remote source (remote source) using at least one of wired techniques (e.g., coaxial cable, fiber optic cable, twisted pair, digital Subscriber Line (DSL), etc.) and wireless techniques (e.g., infrared, microwave, etc.), at least one of these wired and wireless techniques is included within the definition of transmission medium.

Information, signals, and the like described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

In addition, terms explained in the present disclosure and terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and the symbol may be a signal (signaling). In addition, the signal may be a message. In addition, a Component Carrier (CC) may also be referred to as a Carrier frequency, a cell, a frequency Carrier, or the like.

The terms "system" and "network" as used in this disclosure are used interchangeably.

In addition, information, parameters, and the like described in the present disclosure may be expressed by absolute values, may be expressed by relative values to specific values, and may be expressed by other corresponding information. For example, the radio resource may also be indicated by an index.

The names used for the above parameters are not limiting names in all aspects. Further, the mathematical expressions and the like using these parameters may be different from those explicitly disclosed in the present disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and thus, the various names assigned to these various channels and information elements are not limiting names in all respects.

In the present disclosure, terms such as "Base Station (BS)", "wireless Base Station", "Base Station apparatus", "fixed Station (fixed Station)", "NodeB", "eNodeB (eNB)", "gnnodeb (gNB)", "access point (access point)", "transmission point)", "reception point (reception point)", "cell", "sector", "cell group", "carrier", "component carrier" can be used interchangeably. There are also the following cases: a base station is referred to by terms such as macrocell, smallcell, femtocell, picocell, and the like.

A base station can accommodate one or more (e.g., 3) cells. In the case where a base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each smaller area can also be provided with a communication service by a base station subsystem (e.g., an indoor small Radio Head (RRH)), the term "cell" or "sector" refers to a part or the entire coverage area of at least one of the base station and the base station subsystem that performs a communication service within the coverage area.

In the present disclosure, terms such as "Mobile Station (MS)", "User terminal (User terminal)", "User Equipment (UE)", "terminal" and the like can be used interchangeably.

There are also cases where: a mobile station is referred to by one of ordinary skill in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset (hand set), user agent, mobile client, or several other appropriate terms.

At least one of the base station and the mobile station may also be referred to as a transmitting apparatus, a receiving apparatus, a communication apparatus, or the like. At least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, or the like. The mobile body may be a vehicle (e.g., a vehicle, an airplane, etc.), may be a mobile body that moves in an unmanned manner (e.g., a drone (a drone), an autonomous vehicle, etc.), or may be a robot (manned or unmanned). In addition, at least one of the base station and the mobile station may further include a device that does not necessarily move at the time of communication operation. 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.

In addition, the base station in the present disclosure may also be replaced with a user terminal. For example, the various aspects/embodiments of the present disclosure may also be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (e.g., which may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-electrical networking), etc.). In this case, the terminal 20 may have the functions of the base station 10 described above. The expressions such as "uplink" and "downlink" may be replaced with expressions (for example, "side") corresponding to inter-terminal communication. For example, the uplink channel, the downlink channel, and the like may be replaced with the side channel.

Also, the user terminal in the present disclosure may be replaced with a base station. In this case, the base station may have the functions of the user terminal described above.

The terms "determining", "deciding" and the like used in the present disclosure encompass various operations in some cases. "determining" and "decision" may include, for example, determining "and" deciding "on a decision (judging), calculation (calculating), processing (processing), derivation (deriving), investigation (investigating), search (looking up), search, inquiry (querying)) (e.g., a search in a table, database, or other data structure), confirmation (authenticating), and the like. The terms "determine" and "decide" also include cases where it is considered to perform "determination" and "decision" on reception (e.g., reception information), transmission (e.g., transmission information), input (input), output (output), access (access) (e.g., access to data in a memory), and the like. The "determination" and "decision" may include cases regarded as "determination" and "decision" for solution (resolving), selection (selecting), selection (breathing), establishment (evaluating), comparison (comparing), and the like. In other words, "determining" or "decision" may include what is considered to be "determining" or "deciding" for some operation. The "determination (determination)" may be replaced with "assumption", "expectation", "consideration", and the like.

The terms "connected" and "coupled" or all variations thereof mean that all connections or couplings, directly or indirectly, between 2 or more elements are connected or coupled, and can include the case where 1 or more intermediate elements exist between 2 elements that are "connected" or "coupled" to each other. The combination or connection between the elements may be physical, logical, or a combination of these. For example, "connect" may also be replaced with "access". As used in this disclosure, 2 elements can be considered to be "connected" or "joined" to each other using at least one of 1 or more electrical wires, cables, and printed electrical connections, and as a few non-limiting and non-inclusive examples, using electromagnetic energy or the like having wavelengths in the wireless frequency domain, the microwave region, and the optical (both visible and invisible) region.

The Reference Signal may be abbreviated as RS (Reference Signal) or may be called Pilot (Pilot) according to the applied standard.

The term "based on" used in the present disclosure does not mean "based only" unless otherwise specified. In other words, a statement that "based on" means both "based only on" and "based at least on".

Any reference to elements using the designations "first," "second," etc. used in this disclosure does not fully define the amount or order of such elements. These terms may be used in this disclosure as a convenient way to distinguish between more than two elements. Therefore, references to first and second elements do not mean that only 2 elements may be employed or that the first element may have some form of precedence over the second element.

The "method" in the configuration of each device described above may be replaced with "cell", "circuit", "device", and the like.

In the present disclosure, when the terms "include", "including" and variations thereof are used, these terms are intended to have inclusive meanings as in the term "comprising". Also, the term "or" used in the present disclosure does not mean exclusive or.

A radio frame may also be made up of one or more frames in the time domain. One or more individual frames may also be referred to as subframes in the time domain. Further, a subframe may also be composed of one or more slots in the time domain. The subframe may also be a fixed time length (e.g., 1 ms) independent of a parameter set (numerology).

A parameter set may also refer to communication parameters applied in at least one of transmission and reception of a certain signal or channel. For example, the parameter set may indicate at least one of SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission Time Interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the Time domain, and the like.

The time slot may be formed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, or the like) in the time domain. Further, the time slot may also be a time unit based on a parameter set.

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

The radio frame, subframe, slot, mini-slot, and symbol all represent a unit of time when a signal is transmitted. The radio frame, subframe, slot, mini-slot, and symbol may also use other names corresponding to each.

For example, one subframe may also be referred to as a Transmission Time Interval (TTI), a plurality of consecutive subframes may also be referred to as TTIs, and one slot or one mini-slot may also be referred to as a TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in the conventional LTE, may be a period shorter than 1ms (for example, 1 to 13 symbols), or may be a period longer than 1ms. The unit indicating TTI may be referred to as a slot, a mini slot, or the like, instead of a subframe.

Here, the TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling for allocating radio resources (such as a frequency bandwidth and transmission power usable by each terminal 20) to each terminal 20 in TTI units. In addition, the definition of TTI is not limited thereto.

The TTI may be a transmission time unit of a channel-coded data packet (transport block), code block, code word, or the like, or may be a processing unit of scheduling, link adaptation, or the like. In addition, when a TTI is given, a time interval (e.g., the number of symbols) to which a transport block, a code block, a codeword, or the like is actually mapped may be shorter than the TTI.

When one slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit for scheduling. The number of slots (the number of mini-slots) constituting the minimum time unit of the schedule may be controlled.

A TTI having a time length of 1ms may also be referred to as a normal TTI (TTI in LTE rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be replaced with a TTI having a time length exceeding 1ms, and a short TTI (e.g., a shortened TTI, etc.) may be replaced with a TTI having a TTI length smaller than that of the long TTI and equal to or longer than 1ms.

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

The time domain of the RB may include one or more symbols, and may have a length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, and the like may be formed of one or more resource blocks.

In addition, one or more RBs may also be referred to as Physical Resource Blocks (PRBs), sub-Carrier groups (SCG), resource Element Groups (REGs), PRB pairs, RB pairs, and the like.

In addition, a Resource block may also be composed of one or more Resource Elements (REs). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

The Bandwidth Part (BWP: bandwidth Part) (which may also be referred to as a partial Bandwidth) may also represent a subset of consecutive common RBs (common resource blocks) for a certain set of parameters in a certain carrier. Here, the common RB may also be determined by an index of an RB with reference to a common reference point of the carrier. PRBs may also be defined in a certain BWP and are numbered additionally within the BWP.

The BWP may include UL BWP (UL BWP) and DL BWP (DL BWP). One or more BWPs may also be set within 1 carrier for the UE.

At least one of the set BWPs may be active, and the UE may not expect to transmit and receive a specific signal/channel other than the active BWP. In addition, "cell", "carrier", and the like in the present disclosure may also be replaced with "BWP".

The above-described structures of radio frames, subframes, slots, mini slots, symbols, and the like are merely examples. For example, the number of subframes included in the radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the Cyclic Prefix (CP) length, and other configurations can be variously changed.

In the present disclosure, for example, in the case where articles are added by translation as in a, an, and the in english, the present disclosure may also include a case where nouns following these articles are plural.

In the present disclosure, the term "a is different from B" may mean "a and B are different from each other". In addition, the term may also mean "a and B are different from C, respectively". The terms "separate", "associated", and the like may likewise be construed as "different".

The aspects and embodiments described in the present disclosure may be used alone, or in combination, or may be switched and used as the execution proceeds. Note that the notification of the specific information (for example, the notification of "X") is not limited to be explicitly performed, and may be performed implicitly (for example, the notification of the specific information is not performed).

In the present disclosure, "MeasObjectNR" is an example of a setting related to measurement.

Although the invention according to the present disclosure has been described in detail above, it will be apparent to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the present invention defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes and does not have any limiting meaning to the invention to which the present disclosure relates.

Description of the reference numerals

A base station; a transmitting unit; a receiving unit; a setting unit; a control unit; a terminal; a transmitting unit; a receiving unit; a setting unit; a control unit; a processor; a storage device; an auxiliary storage device; a communications device; an input device; an output device.

Claims (6)

1. A terminal, characterized by having:

a reception unit that receives a setting relating to measurement from a base station;

a control unit that performs Measurement using an SMTC (SS/PBCH block Measurement Timing Configuration) window determined based on the setting relating to the Measurement; and

a transmission unit that transmits a result of the measurement performed to the base station,

the control unit sets adjacent small gaps at the beginning and end of the SMTC window based on the setting relating to the measurement.

2. The terminal of claim 1,

the control unit sets small gaps outside the beginning and end of the SMTC window based on the setting relating to the measurement.

3. The terminal of claim 1,

the control unit sets small gaps at the beginning and end of the SMTC window based on the setting relating to the measurement.

4. The terminal of claim 1,

the control unit sets small gaps in the same adjacent period at the beginning and end of the SMTC window based on the setting relating to the measurement.

5. The terminal of claim 1,

the control unit sets small gaps of adjacent different periods at the beginning and end of the SMTC window based on the setting relating to the measurement.

6. A communication method, characterized by being performed by a terminal:

a reception process of receiving a setting relating to measurement from a base station;

a control process of performing Measurement using an SMTC (SS/PBCH block Measurement Timing Configuration: SS/PBCH block Measurement Timing setting) window determined based on a setting involved in the Measurement; and

a transmission procedure of transmitting a result of the measurement performed to the base station,

the control process comprises the following steps: a process of setting adjacent small gaps at the beginning and end of the SMTC window based on the setting relating to the measurement.

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