WO2021157039A1

WO2021157039A1 - Terminal and communication method

Info

Publication number: WO2021157039A1
Application number: PCT/JP2020/004686
Authority: WO
Inventors: 慎也熊谷; 聡永田; 高橋　秀明; リフェワン; ギョウリンコウ
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2020-02-06
Filing date: 2020-02-06
Publication date: 2021-08-12

Abstract

A terminal (20) comprises a reception unit (201) that receives feedback information regarding uplink data transmission by means of a Configured Grant (CG), and a control unit (203) that terminates uplink repeated transmission on the basis of a Dynamic Grant (DG) when the feedback information indicates an ACK.

Description

Terminal and communication method

This disclosure relates to terminals and communication methods.

In the Universal Mobile Telecommunication System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of higher data rate and lower latency. In addition, a successor system to LTE is also being studied for the purpose of further widening and speeding up from LTE. The successor systems to LTE include, for example, LTE-Advanced (LTE-A), FutureRadioAccess (FRA), 5thgenerationmobilecommunication system (5G), 5Gplus (5G +), RadioAccessTechnology (New-RAT), New. There is a system called Radio (NR).

In a wireless communication system such as NR, for example, the application of repetition in which a terminal repeatedly transmits an uplink transmission signal (for example, a data signal) is being considered.

There is room for consideration regarding the relationship between ACK / NACK, which is the response information of uplink transmission, and repetition (in other words, control of repetition for response information of uplink transmission).

One of the purposes of the present disclosure is to realize appropriate repetition control for the response information of uplink transmission.

The terminal according to one aspect of the present disclosure ends the receiving unit that receives the feedback information for the uplink data transmission by the Configured Grant (CG), and the uplink repeated transmission based on the Dynamic Grant (DG) when the feedback information indicates ACK. It is provided with a control unit to be used.

According to the present disclosure, appropriate repetition control can be realized for ACK / NACK, which is the response information of uplink transmission.

Diagram showing an example of the minimum interval D in the case of repetition of Configured Grant Physical Uplink Shared Channel A diagram showing an example of the minimum interval D in the case of repetition of Dynamic Grant Physical Uplink Shared Channel. Diagram showing an example of stopping repetition by an Uplink grant It is a block diagram which shows an example of the structure of a base station. It is a block diagram which shows an example of the configuration of a terminal. A table showing an example of N ₁ and N ₂ It is a figure which shows an example of the hardware composition of a base station and a terminal.

Hereinafter, embodiments will be described with reference to the drawings as appropriate. Unless otherwise specified, the same elements are designated by the same reference numerals throughout the present specification. The matters described below along with the accompanying drawings are for illustration purposes and not for the sole embodiment. For example, when the order of operations is indicated in the embodiment, the order of operations may be appropriately changed as long as there is no contradiction in the overall operation.

When a plurality of embodiments and / or variants are exemplified, some configurations, functions and / or operations in the embodiments and / or variants are, to the extent that there is no contradiction, in other embodiments and / or. It may be included in the modifications and / or replaced with the corresponding configurations, functions and / or operations of other embodiments and / or variants.

Further, in the embodiment, an unnecessarily detailed explanation may be omitted. For example, publicly known or well-known technical matters in order to avoid unnecessarily redundant explanations and / or obscure technical matters or concepts and facilitate understanding by those skilled in the art. The detailed description of the above may be omitted. In addition, duplicate description of substantially the same configuration, function, and / or operation may be omitted.

The accompanying drawings and the following description are provided to aid in understanding the embodiments and are not intended to limit the subject matter described in the claims. In addition, the terms used in the following description may be appropriately read as other terms to aid the understanding of those skilled in the art.

<Knowledge that led to this disclosure>
At 3GPP, it was agreed to use two grants called Dynamic Grant (DG) and Configured Grant (CG).

DG and CG are information related to signal transmission scheduling in a terminal (UE), and for example, at least one of DG and CG schedules an uplink (UL) channel. For example, the uplink channel includes a Physical Uplink Shared Channel (PUSCH) used for transmitting data and a Physical Uplink Control Channel (PUCCH) used for transmitting control information.

The PUSCH scheduled by DG may be referred to as DG PUSCH. The PUSCH scheduled by CG may be referred to as CG PUSCH. Further, for example, signal transmission using CG PUSCH and signal transmission using DG PUSCH may be referred to as CG PUSCH transmission and DG PUSCH transmission, respectively.

It was also agreed that if CG is set on the UE, feedback information called Downlink Feedback Information (DFI) will be sent to the UE. As for CG, for example, one or a plurality of configurations may be set in the UE by a higher layer message. Further, in CG, one or more settings (configuration) are set in the UE by the upper layer message, and one or more specific settings are enabled (Activation) in the downlink control information (DCI). ) May be done. DFI includes, for example, response information to PUSCH in UL's hybrid automatic repeat request (HARQ) process (hereinafter, may be referred to as "HARQ-ACK"). The response information includes, for example, an acknowledgment (ACK) or a negative response (Negative Acknowledgement (NACK)). Note that DFI may be referred to as "CG-DFI" because it is transmitted to the UE when CG is set in the UE.

It was then agreed that the 3GPP would support at least the following in the design of DFI for CG:
DFI includes a transport block (TB) level HARQ-ACK bitmap for all UL HARQ processes. Here, the total number of HARQ processes is specified in Release 15. For example, the total number of HARQ processes is up to 16.
-Radio Resource Control (RRC) signaling sets the minimum interval D. The minimum interval D is the minimum interval from the last symbol of the PUSCH to the start symbol of DFI including HARQ-ACK for the PUSCH. The UE assumes that HARQ-ACK for PUSCH whose transmission ends before n-D is a valid ACK. Here, n is the time corresponding to the start symbol of DFI.
The Complexity of Blind Decoding in the UE does not increase due to the size of DFI.

Here, the transport block (TB) level HARQ-ACK for all UL HARQ processes includes, for example, HARQ-ACK for DG PUSCH and HARQ-ACK for CG PUSCH. In other words, it was agreed that DFI would include HARQ-ACK for DG PUSCH and HARQ-ACK for CG PUSCH.

Also, the time interval between PUSCH and DFI carrying HARQ-ACK for PUSCH and the conditions under which the UE is assumed to be a valid ACK have been agreed.

In addition, the following points were agreed on CG PUSCH.
-If the parameter repK that defines the number of repetitions is set to be greater than 1 in the UE, the repeatedly transmitted TBs are mapped within one configuration in the case where multiple active configurations are set in the UE. ..
-In this case, the UE repeats TB with the earliest consecutive transmission opportunity candidate in the same configuration instead of consecutive slots.
-The UE may drop the repeated transmission corresponding to the set interval that follows.
The UE terminates the repetition when a clear feedback indicating ACK is received for the HARQ process in DFI.

In the above contents, it is agreed that the CG PUSCH will be repetitioned according to the repK, and that the CG PUSCH repetition will be stopped based on the information contained in DFI.

Further, for example, the following points have been agreed regarding the minimum interval D in the case of slot aggregation and CG repetition.
-For the case of CG PUSCH repetition, the minimum interval D means from the end symbol of each PUSCH transmitted K times repeatedly to the start symbol of DFI including HARQ-ACK for the associated HARQ process ID. ..
In the case of slot aggregation for scheduled UL transmission, the minimum interval D is the HARQ-ACK for the associated HARQ process ID from the PUSCH termination symbol in the first slot of multiple slots with repeated transmissions. Refer to up to the start symbol of the including DFI.
When the value of HARQ-ACK is ACK, the minimum interval D is from the end symbol of the first PUSCH of repeated transmission of TB to the start symbol of DFI.
When the value of HARQ-ACK is Negative Acknowledgement (NACK), the minimum interval D is from the end symbol of the last PUSCH available for repeated transmission of TB to the start symbol of DFI.

In other words, it was agreed that DG PUSCH may be slot-aggregated and transmitted when CG is set in the UE. Here, the slot-aggregated DG PUSCH may be used for repetition.

The above minimum interval D will be described with reference to FIGS. 1 and 2. FIG. 1 is a diagram showing an example of the minimum interval D in the case of repetition of CG PUSCH. FIG. 2 is a diagram showing an example of the minimum interval D in the case of repetition of DG PUSCH. The horizontal axis of FIGS. 1 and 2 indicates the time axis.

FIG. 1 illustrates the positions of CG PUSCH's four (repK = 4) repetition transmission opportunities (hereinafter, may be referred to as repetition opportunities) on the time axis and the corresponding DFI positions. Will be done.

As shown in FIG. 1, the minimum interval D is defined as from the end symbol of each CG PUSCH repeatedly transmitted to the start symbol of DFI.

FIG. 2 shows the positions of the four transmission opportunities of DG PUSCH on the time axis and the corresponding DFI positions.

As shown in FIG. 2, the minimum interval D is defined for ACK from the end symbol of the first DG PUSCH of repeated transmission of TB to the start symbol of DFI. Further, the minimum interval D is defined for NACK from the end symbol of the last DG PUSCH to the start symbol of DFI.

Note that the number of transmission opportunities in FIGS. 1 and 2 is an example, and the present disclosure is not limited to this. The number of repetition opportunities may be 3 or less or 5 or more.

Section 6.1.2.3.1 of 3GPP Technical Specification (TS) 38.214 stipulates the suspension of repetition for any redundancy version (RV) version of CG.
-For example, the repetition is terminated after transmitting K repetitions. Alternatively, the repetition ends at the last transmission opportunity in the K iterations within section P. Alternatively, the iteration is stopped from the first symbol of the iteration that overlaps the PUSCH of the same HARQ process scheduled by DCI format 0_0 or 0_1. The iteration may be terminated at any of these three timings, whichever comes first.

In other words, the CG PUSCH repetition is stopped when the PUSCH of the same HARQ process is scheduled by DCI (corresponding to UL grant (in other words, DG)).

In addition, section 6.1 of TS38.214 describes the following points regarding the relationship between the CG PUSCH repetition and the UL grant.
• The UE is not expected to send PUSCH in a serving cell for a HARQ process, scheduled by the Physical Downlink Control Channel (PDCCH) whose termination is the symbol i, if the following two conditions are met: The first condition is that there is a transmission opportunity for the UE to transmit a CG PUSCH according to TS38.321 in the same HARQ process in the same serving cell starting at symbol j after symbol i. The second condition is that the gap from the end of PDCCH to the start of symbol j is smaller than _{that of the N 2 symbol.}

Since the PDCCH includes the UL grant, in other words, the UL grant defines the conditions for stopping the repetition of the CG PUSCH and an example of the timeline regarding the stop of the repetition.

FIG. 3 is a diagram showing an example of stopping repetition by UL grant. The horizontal axis of FIG. 1 indicates the time axis. FIG. 1 shows the position of the CG PUSCH corresponding to the HARQ process number (HPN) # x on the time axis of four repetitions (repK = 4) and the transmission timing of the UL grant for the same HPN # x. ..

For example, if the base station (gNodeB (gNB)) wants to cancel the UL transmission by the UE at the 3rd and 4th repetition opportunities at the 4 repetition opportunities, the UL grant is at least as shown in FIG. It is transmitted before the _{N 2} symbol from symbol j (Tx), which is the start timing of the third repetition opportunity.

According to the above agreement and TS provisions, when CG is set in the UE, DG PUSCH may be slot-aggregated and transmitted. The DFI transmitted to the terminal when CG is set in the UE includes HARQ-ACK for CG PUSCH and DG PUSCH.

And, according to the above agreement and the provisions of TS, the repetition of CG PUSCH is stopped based on HARQ-ACK for CG PUSCH included in DFI or based on UL grant. Then, in the stop of the repetition of CG PUSCH based on the UL grant, there is a timeline showing the timing of the stop of the repetition.

However, there is room for consideration regarding the control of repetition for DFI, which is an example of uplink transmission response information.

For example, there is room for consideration regarding control related to slot-aggregated DG PUSCH repetition, for example, control based on HARQ-ACK for DG PUSCH included in DFI.

In addition, there is room for consideration regarding the control of the repetition with respect to DFI, for example, the control of the timeline in the time direction when the CG PUSCH repetition and the DG PUSCH repetition exist.

In one aspect of the present disclosure, appropriate repetition control for DFI, which is an example of uplink transmission response information, will be described.

<Base station configuration>
FIG. 4 is a block diagram showing an example of the configuration of the base station 10. The base station 10 includes, for example, a transmission unit 101, a reception unit 102, and a control unit 103. The base station 10 wirelessly communicates with the terminal 20 (see FIG. 5).

The transmission unit 101 transmits a downlink (DL) signal to the terminal 20. For example, the transmission unit 101 transmits a DL signal under the control of the control unit 103. The DL signal may include, for example, information indicating scheduling regarding signal transmission of the terminal 20 (for example, UL grant), or control information (for example, Downlink Control Information (DCI)). In addition, the control information may include DFI. The DFI may include information about an acknowledgment to a signal transmitted from the terminal 20.

The receiving unit 102 receives the uplink (uplink, UL signal) transmitted from the terminal 20. For example, the receiving unit 102 receives the UL signal under the control of the control unit 103. The received UL signal may include, for example, information regarding the processing capacity of the terminal 20 (for example, UE processing capability).

The control unit 103 controls the communication operation of the base station 10, including the transmission process of the transmission unit 101 and the reception process of the reception unit 102.

For example, the control unit 103 receives data, control information, and the like from the upper layer and outputs the data to the transmission unit 101. Further, the control unit 103 outputs the data received from the reception unit 102, the control information, and the like to the upper layer.

<Terminal configuration>
FIG. 5 is a block diagram showing an example of the configuration of the terminal 20. The terminal 20 includes, for example, a receiving unit 201, a transmitting unit 202, and a control unit 203. The terminal 20 wirelessly communicates with the base station 10, for example.

The receiving unit 201 receives the DL signal transmitted from the base station 10. For example, the receiving unit 201 receives the DL signal under the control of the control unit 203.

The transmission unit 202 transmits the UL signal to the base station 10. For example, the transmission unit 202 transmits a UL signal under the control of the control unit 203. For example, the transmission unit 202 transmits a UL signal using DG PUSCH and / or CG PUSCH.

The control unit 203 controls the communication operation of the terminal 20, including the reception process in the reception unit 201 and the transmission process in the transmission unit 202. For example, the control unit 203 receives data, control information, and the like from the upper layer and outputs the data to the transmission unit 202. Further, the control unit 203 outputs, for example, the data received from the reception unit 201, the control information, and the like to the upper layer.

Further, the control unit 203 controls the repetition transmission of the DG PUSCH and / or the repetition transmission of the CG PUSCH. For example, the control unit 203 controls the stop of repetition transmission.

Next, a specific control method for repetition transmission control will be described.

<Control method 1>
In the control method 1, the terminal 20 does not stop the repetition transmission of the DG PUSCH regardless of the contents of the DFI for the HARQ process (for example, whether it indicates ACK or NACK). In other words, the repetition of DG PUSCH may be continued until, for example, the specified number of times indicated by the parameter push-AggregationFactor is reached. For example, the terminal 20 does not stop the repetition transmission of the DG PUSCH when the DFI for the HARQ process indicates ACK. In other words, the ACK (eg, valid ACK) shown in the DFI for the HARQ process need not be used to stop the repetition transmission. Alternatively, the terminal 20 does not stop the repetition transmission of the DG PUSCH when it does not receive the DFI for the HARQ process. The case where DFI for the HARQ process is not received includes the case where DFI does not exist, for example, the case where CG is not set in the terminal 20.

The repetition transmission of the DG PUSCH may be executed in the DG PUSCH to which the slot aggregation is applied.

<Control method 2>
In the control method 2, the terminal 20 may stop the repetition transmission of the DG PUSCH based on the contents of the DFI for the HARQ process. For example, the terminal 20 may stop the repetition transmission of the DG PUSCH when the DFI for the HARQ process indicates ACK. In other words, the ACK (eg, valid ACK) shown in the DFI for the HARQ process may be used to stop the repetition transmission. In this case, the DG PUSCH repetition may be terminated, for example, before reaching the specified number of times indicated by the parameter push-AggregationFactor.

In relation to the configuration example of FIG. 5, for example, in the control method 2, the receiving unit 201 of the terminal 20 receives DFI (an example of feedback information) for CG PUSCH, and the control unit 203 has DFI ACK. When indicated, the feedback transmission of DG PUSCH may be stopped.

In the control method 1 and the control method 2 described above, the relationship between the contents of the DFI and the control of the repetition transmission of the DG PUSCH (stop transmission) is defined. Appropriate repetition control for one example) can be performed. For example, in the control method 2 described above, since the repetition transmission of the DG PUSCH is stopped based on the contents of the DFI, it is possible to appropriately control the repetition with respect to the DFI. Further, according to the control method 2, for example, the consumption of resources related to repetition transmission can be suppressed.

The above control method 1 and control method 2 may be used in combination, or the two methods may be selectively switched and used. For example, if CG is set in the terminal 20, the terminal 20 uses the control method 2, and if the CG is not set in the terminal 20, the terminal 20 uses the control method 1. good.

In relation to the configuration example of FIG. 5, for example, whether or not the control unit 203 of the terminal 20 stops the repetition transmission of the DG PUSCH when DFI indicates ACK depending on whether or not the CG is set to the terminal 20. May be decided. In other words, the repetition control of DG PUSCH may be different depending on whether or not CG is set in the terminal 20.

A relationship (for example, a timeline) between the timing at which the terminal 20 receives the DFI and the timing at which the repetition transmission is stopped (the timing at which the stop is started) may be set.

In the following, the relationship (in other words, control) between the reception timing of DFI and the timing of stopping the repetition transmission of PUSCH will be described without distinguishing between DG and CG.

<Control method 3>
In the control method 3, a timeline between the timing at which the terminal 20 receives the DFI and the timing at which the terminal 20 stops the repetition transmission is defined in the standard. The terminal 20 controls the repetition according to a defined timeline. In other words, the terminal 20 has a function for repetition conforming to the standard.

In the control method 3, for example, the terminal 20 receives an ACK in the PDCCH whose end is the symbol i for a certain HARQ process, and sends a PUSCH in a certain serving cell for the HARQ process starting from the symbol j. Is not supposed to stop. Here, the time interval (gap) between the end symbol i of PDCCH and the start symbol j of PUSCH is smaller than, for example, the X symbol. In addition, DFI may be included in PDCCH.

In other words, when the gap between the end symbol of the PDCCH and the start symbol of the PUSCH is smaller than the X symbol, the terminal 20 does not stop the PUSCH transmission even if the DFI included in the PDCCH indicates ACK. On the other hand, when the gap between the end symbol of the PDCCH and the start symbol of the PUSCH is greater than or equal to the X symbol, the terminal 20 stops the PUSCH transmission based on the DFI indicating ACK.

In relation to the configuration example of FIG. 5, for example, the receiving unit 201 of the terminal 20 receives the PDCCH (an example of a channel including downlink control information), and the control unit 203 ACKs the DFI included in the PDCCH with respect to the PUSCH. When indicated, it is determined not to end the repetition transmission of the PUSCH in a specific period (for example, the X symbol) after the end timing of the PDCCH.

The value of the parameter "X" indicating the number of threshold symbols related to the gap may be fixed, for example, or may be set based on the information possessed by the terminal 20 and / or the information received from the base station 10. For example, the parameter X may be set based on the processing capability of the terminal 20. _{As an example, the parameter X may be a parameter N 2} (X = N ₂ ) indicating the processing capacity of the terminal 20 for UL transmission (for example, PUSCH transmission), or the terminal 20 for DL reception (for example, PDSCH reception). It may be a parameter N ₁ (X = N ₁ ) indicating the processing capacity of. Parameter N ₂ may be the parameter described in Subclause 6.4 of TS 38.214. Further, the parameter N ₁ may be the parameter described in Subclause 5.3 of TS 38.214.

FIG. 6 is a table showing an example of _{parameters N 1} and N _2. Figure 6 is, Table 1 ~ Table 2 shows an example of a parameter N _2, and the Table 3 ~ Table 5 showing an example of a parameter N ₁ is shown. _{For example, the terminal 20 may set N 1} or N ₂ in any one of Tables 1 to 5 shown in FIG. 6 to X above. The selection of any of Tables 1 to 5 in FIG. 6 may be based on the information possessed by the terminal 20 and / or the information received from the base station 10.

<Control method 4>
In the control method 4, for example, in the terminal 20, the timeline between the timing when the terminal 20 receives the DFI and the timing when the terminal 20 stops the repetition transmission is not defined. In other words, in the control method 4, it may depend on the terminal 20 whether or not the repetition transmission is stopped, and which repetition transmission is stopped when the repetition transmission is stopped. For example, when the terminal 20 receives the DFI indicating ACK, the terminal 20 may stop the repetition transmission at the shortest time determined according to the processing capacity of the terminal 20. In other words, the terminal 20 may continue the repetition transmission until the shortest time even when the terminal 20 receives the DFI indicating ACK.

In the control method 3 and the control method 4 described above, the timing at which the terminal 20 stops the repetition transmission can be appropriately controlled with respect to the timing at which the terminal 20 receives the DFI.

<Relationship between control method 3 and control method 4 and DG and CG>
In the control method 3 and the control method 4, the control of the reception timing of DFI and the timing of stopping the repetition transmission of PUSCH is shown without distinguishing between DG and CG. For example, the control method 3 and the control method 4 may be applied independently to each of the CG PUSCH and the DG PUSCH.

For example, the control method 3 may be applied to control the timing for both the DG PUSCH and the CG PUSCH. Further, in this case, the parameter X related to the timing control of the DG PUSCH and the parameter X related to the timing control of the CG PUSCH may be set independently of each other. For example, the above N1 may be set in the parameter X related to the timing control of the DG PUSCH, and the above N2 may be set in the parameter X related to the timing control of the CG PUSCH.

Alternatively, the control method 4 may be applied to control the timing for both the DG PUSCH and the CG PUSCH. Alternatively, the control method 3 may be applied to the control of the timing for the DG PUSCH, and the control method 4 may be applied to the control of the timing for the CG PUSCH. Alternatively, the control method 4 may be applied to control the timing for the DG PUSCH, and the control method 3 may be applied to control the timing for the CG PUSCH.

Further, in the above-described embodiment, DG PUSCH and CG PUSCH have been described as examples, but the present disclosure is not limited to this. The present disclosure may also be applied to channels different from DG PUSCH and CG PUSCH.

In the above-described embodiment, the term "stop" may be replaced with other terms such as "end", "end", "censor", "interrupt" and the like.

In the above-described embodiment, "repetition" may be replaced with "repetition transmission", "repetition", "repetition transmission", "repetition transmission opportunity" and the like.

(Hardware configuration)
The block diagram used in the description of the above embodiment shows a block of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. There are broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but only these. I can't. For example, a functional block (constituent unit) that makes transmission function is called a transmitting unit (transmitting unit) or a transmitter (transmitter). As described above, the method of realizing each of them is not particularly limited.

For example, the base station, terminal, etc. in the embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. FIG. 7 is a diagram showing an example of the hardware configuration of the base station and the terminal 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 memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following explanation, the word "device" can be read as a circuit, device, unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in FIG. 4, or may be configured not to include some of the devices.

For each function of the base station 10 and the terminal 20, the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the memory 1002, and controls the communication by the communication device 1004. , It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like. For example, the above-mentioned control unit 103, control unit 203, and the like may be realized by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, the control unit 103 of the base station 10 or the control unit 203 of the terminal 20 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, or may be realized in the same manner for other functional blocks. good. Although the above-mentioned various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one such as a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). May be done. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, or a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the memory 1002 and the storage 1003.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of. For example, the transmission unit 101, the reception unit 102, the reception unit 201, the transmission unit 202, and the like described above may be realized by the communication device 1004.

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

Further, each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information. The bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.

Further, the base station 10 and the terminal 20 are hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include, and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardware.

(Information notification, signaling)
The notification of information is not limited to the embodiments / embodiments described in the present disclosure, and may be performed by other methods. For example, information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. It may be carried out by notification information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. Further, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

(Applicable system)
Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 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)) )), LTE 802.16 (WiMAX®), LTE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize and extend based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).

(Processing procedure, etc.)
The order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.

(Operation of base station)
In some cases, the specific operation performed by the base station in the present disclosure may be performed by its upper node. In a network consisting of one or more network nodes having a base station, various operations performed for communication with the terminal are performed by the base station and other network nodes other than the base station (for example, MME or). It is clear that it can be done by at least one of (but not limited to, S-GW, etc.). Although the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

(Input / output direction)
Information and the like (* see the item "Information, signal") can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

(Handling of input / output information, etc.)
The input / output information and the like may be stored in a specific location (for example, a memory), or may be managed using a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.

(Judgment method)
The determination may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example, a predetermined value). It may be done by comparison with the value).

(software)
Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, procedures, features, etc. should be broadly interpreted.

Further, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

(Information, signal)
The information, signals, etc. described in the present disclosure may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

Note that the terms explained in the present disclosure and the terms necessary 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 be a signal (signaling). Also, the signal may be a message. Further, the component carrier (CC: Component Carrier) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

("System", "Network")
The terms "system" and "network" used in this disclosure are used interchangeably.

(Parameter, channel name)
In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, the radio resource may be one indicated by an index.

The names used for the above parameters are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. Since the various channels (eg, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are in any respect limited names. is not it.

(Base station (wireless base station))
In the present disclosure, "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", ""Accesspoint","transmissionpoint","receptionpoint","transmission / reception point", "cell", "sector", "cell group", Terms such as "carrier" and "component carrier" may be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)). Communication services can also be provided by Remote Radio Head)). The term "cell" or "sector" refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage.

(Terminal)
In the present disclosure, terms such as "mobile station (MS)", "user terminal", "user equipment (UE)", and "terminal" may be used interchangeably. ..

Mobile stations can be used 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. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

(Base station / Mobile station)
At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of a base station and a mobile station may be an IoT (Internet of Things) device such as a sensor.

Further, the base station in the present disclosure may be read by the user terminal. For example, the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the terminal 20 may have the function of the base station 10 described above. In addition, words such as "up" and "down" may be read as words corresponding to communication between terminals (for example, "side"). For example, an uplink channel, a downlink channel, and the like may be read as a side channel.

Similarly, the terminal in the present disclosure may be read as a base station. In this case, the base station 10 may have the functions of the terminal 20 described above.

(Meaning and interpretation of terms)
The terms "determining" and "determining" as used in this disclosure may include a wide variety of actions. "Judgment" and "decision" are, for example, judgment, calculation, computing, processing, deriving, investigating, looking up, search, inquiry. (For example, searching in a table, database or another data structure), ascertaining may be regarded as "judgment" or "decision". Also, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (Accessing) (for example, accessing data in memory) may be regarded as "judgment" or "decision". In addition, "judgment" and "decision" mean that the things such as solving, selecting, choosing, establishing, and comparing are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include considering some action as "judgment" and "decision". Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two "connected" or "combined" elements. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in the present disclosure, the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be "connected" or "coupled" to each other using electromagnetic energies having wavelengths in the microwave and light (both visible and invisible) regions.

The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) depending on the applicable standard.

The phrase "based on" as used in this disclosure does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

Any reference to elements using designations such as "first", "second", etc. does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.

The "part" in the configuration of each of the above devices may be replaced with a "means", a "circuit", a "device", or the like.

When "include", "including" and variations thereof are used in the present disclosure, these terms are as comprehensive as the term "comprising". Is intended. Furthermore, the term "or" used in the present disclosure is intended not to be an exclusive OR.

The wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further consist of one or more slots in the time domain. The subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.

The numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology includes, for example, subcarrier interval (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, radio frame configuration, transmission / reception. At least one of a specific filtering process performed by the machine in the frequency domain, a specific windowing process performed by the transceiver in the time domain, and the like may be indicated.

The slot may be composed of one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.). Slots may be unit of time based on numerology.

The slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. Further, the mini slot may be referred to as a sub slot. A minislot may consist of a smaller number of symbols than the slot. PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the minislot may be referred to as the PDSCH (or PUSCH) mapping type B.

The wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal. The radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.

For example, one subframe may be called a transmission time interval (TTI), a plurality of consecutive subframes may be called TTI, and one slot or one minislot may be called TTI. You may. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be. The unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.

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

The TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation. When a TTI is given, the time interval (for example, the number of symbols) to which the transport block, code block, code word, etc. are actually mapped may be shorter than the TTI.

When one slot or one minislot is called TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like. TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.

The long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.

The resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. The number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers contained in the RB may be determined based on numerology.

Further, the time domain of the RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.

One or more RBs include 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. May be called.

Further, the resource block may be composed of one or a plurality of resource elements (RE: Resource Element). For example, 1RE may be a radio resource area of 1 subcarrier and 1 symbol.

The bandwidth part (BWP: Bandwidth Part) (which may also be called partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a certain neurology in a carrier. good. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs may be set in one carrier for the UE.

At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP. In addition, "cell", "carrier" and the like in this disclosure may be read as "BWP".

The above-mentioned structures such as wireless frames, subframes, slots, minislots and symbols are merely examples. For example, the number of subframes contained in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots contained in a slot, the number of symbols and RBs contained in a slot or minislot, and the number of RBs. The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP: Cyclic Prefix) length, and other configurations can be changed in various ways.

In the present disclosure, if articles are added by translation, for example, a, an and the in English, the disclosure may include that the nouns following these articles are plural.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". The term may mean that "A and B are different from C". Terms such as "separate" and "combined" may be interpreted in the same way as "different".

(Variations of modes, etc.)
Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure may be implemented as an amendment or modification without departing from the purpose and scope of the present disclosure, which is determined by the description of the scope of claims. Therefore, the description of the present disclosure is for the purpose of exemplary explanation and does not have any limiting meaning to the present disclosure.

One aspect of the present disclosure is useful, for example, in a wireless communication system.

10 Base station 20

Terminal

101, 202

Transmitter

102, 201

Receiver

103, 203 Control

Claims

A receiver that receives feedback information for uplink data transmission by Controlled Grant (CG), and a receiver.
When the feedback information indicates ACK, a control unit that terminates the uplink repetitive transmission based on the Dynamic Grant (DG), and
A terminal equipped with.
If the feedback information is not received, the control unit does not end the repeated transmission.
The terminal according to claim 1.
A transmitter that transmits uplink data and
A control unit that determines whether or not repeated transmission based on the Dynamic Grant (DG) is terminated when an ACK for the uplink data transmission is received, depending on whether or not the Configured Grant (CG) is set.
A terminal equipped with.
The terminal is
Receives feedback information for uplink data transmission by Configured Grant (CG),
When the feedback information indicates ACK, the uplink repetitive transmission based on the Dynamic Grant (DG) is terminated.
Communication method.
The terminal is
Send upstream data and
Whether or not the repeatedly transmission based on the Dynamic Grant (DG) is terminated when the ACK for the uplink data transmission is received is determined depending on whether or not the Controld Grant (CG) is set.
Communication method.