Base station, terminal, communication method, and integrated circuit

Abstract

The invention relates to a base station, a terminal, a communication method and an integrated circuit. The base station comprises: a transmission circuit for transmitting feedback information to a user equipment (UE) on a dedicated physical downlink control channel (PDCCH) of the UE, the feedback information comprising a response signal for uplink data; and a receiving circuit that receives a retransmission based on the feedback information and configuration authorization setting information; wherein the feedback information indicates HARQ-ACK information of each HARQ process by using a bitmap.

Description

[0001] This application is a divisional application of the invention patent application with the application date of September 11, 2019, application number: 201980088208.4, and invention name: "Base station, terminal, communication method and integrated circuit". Technical Field

[0002] The invention relates to a base station, a terminal and a communication method. Background Art

[0003] The 3rd Generation Partnership Project (3GPP) has completed the planning and formulation of the specifications of Release 15 NR (New Radio Access Technology) for the realization of the fifth generation mobile communication system (5G). In NR, the basic requirements of enhanced mobile broadband (eMBB), namely high speed and large capacity, support the function of ultra-reliable and low-latency communication (URLLC) (for example, refer to non-patent documents 1-4).

[0004] Prior art literature

[0005] Patent Literature

[0006] Non-patent document 1: 3GPP TS 38.211 V15.3.0, "NR; Physical channels and modulation (Release 15)," September 2018

[0007] Non-patent document 2: 3GPP TS 38.212 V15.3.0, "NR; Multiplexing and channelcoding (Release 15)," September 2018

[0008] Non-patent document 3: 3GPP TS 38.213 V15.3.0, "NR; Physical layer procedure for control (Release 15)," September 2018

[0009] Non-patent document 4: 3GPP TS 38.214 V15.3.0, "NR; Physical layer procedures for data (Release 15)," September 2018 Summary of the invention

[0010] In NR, feedback methods for uplink data transmission have not been fully studied.

[0011] The non-limiting embodiments of the present invention contribute to providing a base station, a terminal, and a communication method capable of appropriately providing feedback for uplink data transmission.

[0012] A base station of one embodiment of the present invention includes: a sending circuit, which sends feedback information to a user equipment UE on a physical downlink control channel PDCCH dedicated to the UE, wherein the feedback information includes an acknowledgement signal for uplink data; and a receiving circuit, which receives retransmissions based on the feedback information and configuration authorization setting information; wherein the feedback information indicates the HARQ-ACK information of each HARQ process by using a bitmap.

[0013] A terminal of one embodiment of the present invention includes: a receiving circuit, which receives feedback information from a base station on a physical downlink control channel PDCCH dedicated to a user equipment UE, wherein the feedback information includes an acknowledgement signal for uplink data; and a sending circuit, which performs retransmission based on the feedback information and configuration authorization setting information; wherein the feedback information indicates the HARQ-ACK information of each HARQ process by using a bitmap.

[0014] The communication method of one embodiment of the present invention includes: sending feedback information to the user equipment UE on a physical downlink control channel PDCCH dedicated to the UE, the feedback information including an acknowledgement signal for uplink data; and receiving retransmission based on the feedback information and configuration authorization setting information; wherein the feedback information indicates the HARQ-ACK information of each HARQ process by using a bitmap.

[0015] The communication method of one embodiment of the present invention includes: receiving feedback information from a base station on a physical downlink control channel PDCCH dedicated to a user equipment UE, the feedback information including an acknowledgement signal for uplink data; and performing retransmission based on the feedback information and configuration authorization setting information; wherein the feedback information indicates the HARQ-ACK information of each HARQ process by using a bitmap.

[0016] An integrated circuit of an embodiment of the present invention includes: a sending circuit, which controls the sending of feedback information to the user equipment UE on a physical downlink control channel PDCCH dedicated to the UE, wherein the feedback information includes an acknowledgement signal for uplink data; and a receiving circuit, which controls the reception and retransmission based on the feedback information and configuration authorization setting information; wherein the feedback information indicates the HARQ-ACK information of each HARQ process by using a bitmap.

[0017] An integrated circuit of an embodiment of the present invention includes: a receiving circuit, which controls the reception of feedback information from a base station on a physical downlink control channel PDCCH dedicated to a user equipment UE, wherein the feedback information includes an acknowledgement signal for uplink data; and a sending circuit, which controls the execution of retransmission based on the feedback information and configuration authorization setting information; wherein the feedback information indicates the HARQ-ACK information of each HARQ process by using a bitmap.

[0018] A base station according to an embodiment of the present invention includes: a control circuit that determines a method for sending feedback information based on a resource allocation setting for a terminal, the feedback information including a response signal for uplink data; and a sending circuit that sends the feedback information based on the sending method.

[0019] In addition, these broad or specific aspects may be implemented by a system, an apparatus, a method, an integrated circuit, a computer program or a recording medium, or may be implemented by any combination of systems, apparatuses, methods, integrated circuits, computer programs and recording media.

[0020] According to one embodiment of the present invention, feedback can be appropriately made for uplink data transmission.

[0021] More advantages and effects of an embodiment of the present invention will be explained through the description and drawings. The above advantages and / or effects are provided by several embodiments and the features described in the description and drawings, but it is not necessary to provide all the features in order to obtain the advantages and / or effects of one or more of the same features. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a block diagram showing the structure of a part of a base station.

[0023] Figure 2 It is a block diagram showing the structure of a part of the terminal.

[0024] Figure 3 is a block diagram showing the structure of a base station.

[0025] Figure 4 It is a block diagram showing the structure of the terminal.

[0026] Figure 5It is a timing diagram showing an operation example of a base station and a terminal.

[0027] Figure 6 This is a diagram showing an example of DFI (Downlink Feedback Information) according to the first embodiment.

[0028] Figure 7 This is a diagram showing an example of DFI according to the first embodiment.

[0029] Figure 8 This is a diagram showing an example of a PDCCH (Physical Downlink Control Channel).

[0030] Fig. 9 This is a diagram showing an example of PDCCH segmentation method 1 according to the second embodiment.

[0031] Fig.10 This is a diagram showing an example of PDCCH segmentation method 2 according to implementation mode 2.

[0032] Fig.11 This is a diagram showing an example of PDCCH segmentation method 2 according to implementation mode 2.

[0033] Fig.12 This is a diagram showing an example of allocation of DFIs according to the second embodiment.

[0034] Fig.13 This is a diagram showing an example of allocation of DFIs according to the second embodiment. DETAILED DESCRIPTION

[0035] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0036] [Configured grant send]

[0037] In Release 15 NR, as one of the functions for URLLC, "configured grant transmission" (or "grant-free transmission") is supported for the transmission of uplink data (e.g., PUSCH: Physical Uplink Shared Channel).

[0038] In the configured grant transmission of uplink data of version 15 NR, there are "Configured grant type 1 transmission" (hereinafter, sometimes simply referred to as "Configured grant type 1") and "Configured grant type 2 transmission" (hereinafter, sometimes simply referred to as "Configured grant type 2").

[0039] In configuration authorization type 1, configuration authorization setting information such as modulation and coding scheme (MCS), radio resource allocation information (e.g., allocation of time resources or frequency resources), transmission timing and number of HARQ processes are set by terminal-specific high-layer signals (e.g., RRC: Radio Resource Control). When uplink data occurs, the terminal (UE: User Equipment) transmits PUSCH using pre-set MCS and radio resource configuration authorization setting information without an uplink grant (UL grant) (in other words, dynamic uplink data scheduling information) from a downlink control channel (e.g., PDCCH: Physical Downlink Control Channel) from a base station (e.g., also called "gNB").

[0040] In configuration grant type 2, the configuration grant transmission is activated (Activation) or released (Release) using the PDCCH (e.g., DCI: Downlink Control Information) from the base station. In configuration grant type 2, as in configuration grant type 1, the transmission timing and number of HARQ processes, etc. are set by high-layer signals inherent to the terminal. On the other hand, in configuration grant type 2, MCS and wireless resource allocation information, etc. are set by "activation DCI". When uplink data occurs, the terminal semi-permanently (in other words, without uplink authorization) uses the configuration grant setting information such as MCS and wireless resources set by high-layer signals and activation DCI to send PUSCH.

[0041] In Release 16 NR, support for "Configuration Grant Type 1" and "Configuration Grant Type 2" similar to Release 15 NR is also studied. In addition, in Release 16 NR, extension of the function of sending configuration grant is discussed.

[0042] For example, in version 15 NR, the number of configuration authorizations that can be set to be activated for a terminal is one. In contrast, in version 16 NR, it is studied to set multiple configuration authorizations to be activated for a terminal. For example, it is studied that a terminal supports multiple configuration authorizations in configuration authorization type 1 or configuration authorization type 2, or supports multiple configuration authorizations in configuration authorization type 1 and configuration authorization type 2.

[0043] [Configure retransmission control for authorized sending]

[0044] In Release 15 NR, uplink grants are used to configure retransmission control for grant transmission. For example, the base station uses uplink grants to control the MCS and radio resource allocation information of uplink data for retransmission.

[0045] In Release 16 NR, as retransmission control for configuration authorization transmission, in addition to the retransmission control using uplink authorization as in Release 15 NR, retransmission control without uplink authorization that feeds back explicit HARQ-ACK (hybrid automatic repeat request) information for PUSCH is also studied. For example, in Release 16 NR, feedback information (e.g., DFI: Downlink Feedback Information) including an explicit response signal (e.g., HARQ-ACK information (ACK (Acknowledgement) or NACK (Negative Acknowledgement)) for PUSCH is studied for retransmission control for configuration authorization transmission.

[0046] For example, in an unlicensed band (e.g., also called "NR-Unlisenced" (NR-U)), multiple HARQ-ACK information for uplink data (e.g., PUSCH) is fed back to the terminal in a centralized manner. As a result, for example, the load of the base station's Listen before talk (LBT) can be reduced, thereby improving the efficiency of retransmission control. In addition, in retransmission control using explicit HARQ-ACK information, for example, the MCS and radio resource allocation of the uplink data for retransmission can also be the same as those for the initial transmission.

[0047] However, in NR, there is room for research on the method of sending DFI that includes explicit HARQ-ACK information.

[0048] Therefore, in one embodiment of the present invention, a method for transmitting DFI including explicit HARQ-ACK information is described. For example, in one embodiment of the present invention, an efficient method for transmitting DFI including HARQ-ACK information when multiple configuration grants are set for one terminal is described.

[0049] [Overview of Communication System]

[0050] A communication system according to one embodiment of the present invention includes a base station 100 (eg, gNB) and a terminal 200 (eg, UE).

[0051] Figure 1 1 is a block diagram showing a configuration example of a portion of a base station 100 according to one embodiment of the present invention. Figure 1 In the base station 100 shown, the DFI generation unit 106 (equivalent to the control circuit) determines the transmission method of the feedback information (e.g., DFI) including the response signal (e.g., HARQ-ACK information) for uplink data based on the setting (e.g., configuration grant type, etc.) of the resource allocation (e.g., configuration grant) set for the terminal 200. The transmission unit 110 (equivalent to the transmission circuit) transmits the feedback information based on the transmission method.

[0052] Figure 2 1 is a block diagram showing a configuration example of a portion of a terminal 200 according to one embodiment of the present invention. Figure 2 In the terminal 200 shown, the receiving unit 201 (equivalent to the receiving circuit) receives feedback information (e.g., DFI) including a response signal (e.g., HARQ-ACK information) for uplink data from the base station 100. The DFI analysis unit 206 (equivalent to the control circuit) analyzes the feedback information (e.g., DFI) based on the setting of resource allocation (e.g., configuration grant) set for the terminal 200.

[0053] [Structure of base station]

[0054] Figure 3 1 is a block diagram showing a configuration example of a base station 100 according to one embodiment of the present invention. Figure 3 In the figure, the base station 100 includes a receiving unit 101, a demodulation / decoding unit 102, a scheduling unit 103, a sending control unit 104, a control information retention unit 105, a DFI generating unit 106, a signaling information generating unit 107, an activation information generating unit 108, a coding / modulation unit 109 and a sending unit 110.

[0055] The receiving unit 101 receives a signal transmitted from the terminal 200 via an antenna, performs reception processing such as down-conversion or A / D (Analog / Digital) conversion on the received signal, and outputs the received signal after the reception processing to the demodulation / decoding unit 102 .

[0056] The demodulation / decoding unit 102 demodulates and decodes the reception signal (e.g., uplink data) input from the reception unit 101, and outputs the control information included in the decoded signal to the control information storage unit 105. In addition, the demodulation / decoding unit 102 outputs the decoding result of the uplink data to the scheduling unit 103 and the DFI generation unit 106.

[0057] The decoding result of the uplink data may include, for example, information indicating the success or failure of decoding of each transport block (TB). In addition, when transmission in units of code block groups (CBGs) is activated, the decoding result of the uplink data may also include information indicating the success or failure of decoding of each CBG.

[0058] In addition, the control information output to the control information storage unit 105 may include, for example, the data type and data amount of the data stored in the buffer by the terminal 200 .

[0059] The scheduling unit 103 schedules the configuration grant transmission (eg, determines the start and end of the configuration grant transmission) based on the control information input from the control information storage unit 105 , for example. The scheduling unit 103 outputs scheduling information indicating the scheduling result to the transmission control unit 104 .

[0060] In addition, the scheduling unit 103 controls retransmission of uplink data based on the decoding result of the uplink data input from the demodulation / decoding unit 102. For example, when performing retransmission control using explicit HARQ-ACK information on uplink data, the scheduling unit 103 instructs the DFI generation unit 106 to generate DFI (or transmit DFI).

[0061] The transmission control unit 104 sets parameters related to the configuration grant transmission (e.g., MCS and wireless resource allocation information, etc.) based on the scheduling information input from the scheduling unit 103. The transmission control unit 104 generates information indicating the settings related to the configuration grant transmission (e.g., configuration grant setting information). For example, when the configuration grant type 1 is configured, the transmission control unit 104 outputs the configuration grant setting information to the signaling information generating unit 107. For another example, when the configuration grant type 2 is configured, the transmission control unit 104 outputs the configuration grant setting information to the signaling information generating unit 107 and the activation information generating unit 108. In addition, the transmission control unit 104 outputs the configuration grant setting information to the control information retaining unit 105.

[0062] The control information retaining unit 105 retains, for example, control information from the terminal 200 input from the demodulation / decoding unit 102 and configuration authorization setting information input from the transmission control unit 104, and outputs the retained information to the scheduling unit 103 or the DFI generating unit 106 as needed.

[0063] The DFI generation unit 106 generates a DFI (e.g., a payload of the DFI) based on the decoding result of the uplink data input from the demodulation / decoding unit 102 and the configuration authorization setting information input from the control information retention unit 105 according to the instruction from the scheduling unit 103. The DFI generation unit 106 outputs the generated DFI to the coding / modulation unit 109. For example, the DFI may be composed of information for one terminal 200 (e.g., generated for a UE specific PDCCH), or may be composed of information for multiple terminals 200 (e.g., generated for a group common PDCCH (GC-PDCCH)).

[0064] The signaling information generating unit 107 generates high-layer signaling information (or referred to as "RRC signaling", "higher layer parameter", etc.) for setting configuration authorization type 1 or configuration authorization type 2 based on the configuration authorization setting information input from the sending control unit 104, and outputs it to the coding / modulation unit 109.

[0065] The activation information generating unit 108 generates activation information for setting the configuration grant type 2 (for example, information related to activation or release. In other words, activation DCI) based on the configuration grant setting information input from the transmission control unit 104 , and outputs it to the coding / modulation unit 109 .

[0066] The coding / modulation unit 109 encodes and modulates the DFI input from the DFI generation unit 106 , the signaling information input from the signaling information generation unit 107 , or the activation information input from the activation information generation unit 108 , and outputs the modulated signal (symbol sequence) to the transmission unit 110 .

[0067] The transmission unit 110 performs transmission processing such as D / A (Digital / Analog) conversion, up-conversion, or amplification on the signal input from the encoding / modulation unit 109 , and transmits a wireless signal obtained by the transmission processing to the terminal 200 from an antenna.

[0068] [Terminal structure]

[0069] Figure 4 1 is a block diagram showing a configuration example of a terminal 200 according to one embodiment of the present invention. Figure 4In the embodiment, the terminal 200 includes a receiving unit 201, a demodulation / decoding unit 202, an extraction unit 203, a signaling information analysis unit 204, an activation information analysis unit 205, a DFI analysis unit 206, a control information retention unit 207, a sending control unit 208, a sending data generating unit 209, a coding / modulation unit 210 and a sending unit 211.

[0070] The receiving unit 201 performs reception processing such as down-conversion or A / D (Analog / Digital) conversion on a reception signal received via an antenna, and outputs the reception signal to the demodulation / decoding unit 202 .

[0071] The demodulation / decoding unit 202 demodulates and decodes the reception signal input from the reception unit 201. The demodulation / decoding unit 202 outputs the decoded signal to the extraction unit 203.

[0072] The extraction unit 203 extracts, for example, signaling information, activation information, or DFI from the signal input from the demodulation / decoding unit 202. The extraction unit 203 outputs the signaling information to the signaling information analysis unit 204, the activation information to the activation information analysis unit 205, and the DFI to the DFI analysis unit 206.

[0073] The signaling information analysis unit 204 analyzes the signaling information input from the extraction unit 203 , and outputs the configuration authorization setting information for configuration authorization type 1 or configuration authorization type 2 to the control information storage unit 207 .

[0074] The activation information analysis unit 205 analyzes the activation information input from the extraction unit 203 , and outputs the activation information (for example, configuration authorization setting information for configuration authorization type 2) to the control information storage unit 207 .

[0075] The DFI analysis unit 206 analyzes the DFI input from the extraction unit 203 based on the configuration authorization setting information input from the control information storage unit 207 , and outputs the obtained HARQ-ACK information to the transmission control unit 208 .

[0076] The control information retaining unit 207 retains the configuration authorization setting information input from the signaling information analyzing unit 204 or the activation information analyzing unit 205, and outputs the retained configuration authorization setting information to the DFI analyzing unit 206, the sending control unit 208 or the sending data generating unit 209 as needed.

[0077] The transmission control unit 208 determines whether to transmit the configuration grant based on the configuration grant setting information input from the control information storage unit 207 and the HARQ-ACK information input from the DFI analysis unit 206, and instructs the transmission data generation unit 209 to transmit the configuration grant when the configuration grant is to be transmitted.

[0078] The transmission data generation unit 209 generates transmission data (e.g., PUSCH) based on the configuration grant setting information input from the control information storage unit 207 according to the instruction of the transmission control unit 208, and outputs it to the coding / modulation unit 210. For example, the transmission data may include control information related to the terminal 200 (e.g., the type or amount of data stored in the buffer of the terminal 200).

[0079] The coding / modulation unit 210 codes and modulates the transmission data input from the transmission data generation unit 209 , and outputs the modulated signal to the transmission unit 211 .

[0080] The transmission unit 211 performs transmission processing such as D / A conversion, up-conversion, or amplification on the signal input from the encoding / modulation unit 210 , and transmits a wireless signal obtained by the transmission processing to the base station 100 from an antenna.

[0081] [Operations of Base Station 100 and Terminal 200]

[0082] An operation example of the base station 100 and the terminal 200 having the above configuration will be described.

[0083] Figure 5 It is a sequence diagram showing the operations of the base station 100 and the terminal 200 .

[0084] The base station 100 generates configuration grant setting information based on, for example, the scheduling information of the terminal 200 (ST101). The base station 100 notifies the terminal 200 of the configuration grant setting information (ST102). In addition, the configuration grant setting information (for example, including signaling information or activation information) is notified to the terminal 200 through a higher layer signal and activation DCI, for example, according to the configuration grant type. The terminal 200 obtains the configuration grant setting information notified by the base station 100 (ST103).

[0085] For example, when uplink data occurs, the terminal 200 transmits the uplink data based on the configuration grant setting information (ST104).

[0086] The base station 100 generates HARQ-ACK information (e.g., ACK or NACK) for uplink data (ST105), and transmits (in other words, feeds back) a DFI including the generated HARQ-ACK information to the terminal 200 (ST106). In addition, the base station 100 determines a method of transmitting the DFI (in other words, the HARQ-ACK information) based on a configuration grant setting (e.g., a configuration grant type, etc.) for the terminal 200.

[0087] Terminal 200 performs retransmission control on uplink data based on the HARQ-ACK information included in the received DFI (ST107).

[0088] [TB size and CBG number]

[0089] As mentioned above, in NR, retransmission control for each CBG is defined for uplink data (e.g., PUSCH).

[0090] CBG is formed by grouping one or more code blocks (CB), and a transport block (TB) is composed of one or more CBGs. The maximum number of CBGs per TB is set by the base station 100 to the terminal 200, for example, through high-layer signaling, and the CBs are grouped in the terminal 200 in a manner that does not exceed the set maximum number of CBGs. The base station 100 feeds back HARQ-ACK information for each uplink data according to the CBG of the uplink data, thereby realizing retransmission of each CBG by the terminal 200.

[0091] In addition, a method for calculating the number of CBs used in the encoding of the PUSCH of NR is defined in, for example, non-patent document 2. For example, non-patent document 2 discloses a method for calculating the number of CBs in low-density parity check (LDPC: Low density Parity Check) encoding.

[0092] According to non-patent document 2, when the number of CBs is less than the maximum number of CBGs, the number of CBGs used is sometimes less than the maximum number of CBGs. For example, when the TB size is 5000 bits and LDPC base graph 2 is used for LDPC coding (for example, when the maximum CB size = 3840 bits), the number of CBs per 1TB is 2. At this time, for example, even when the maximum number of CBGs is set to 4, because there are 2 CBs, the number of CBGs used by the terminal 200 is set to 2.

[0093] In this way, the number of CBGs used by the terminal 200 varies according to the TB size in the PUSCH. Therefore, when retransmission control is performed for each CBG, the size (eg, number of bits) of the HARQ-ACK information for the PUSCH varies according to the TB size in the PUSCH.

[0094] In addition, in the configuration grant transmission, the change of the TB size in the PUSCH (in other words, the setting opportunity) may be different, for example, depending on the configuration grant type (e.g., configuration grant type 1 or configuration grant type 2). For example, in configuration grant type 1, the TB size is semi-statically set, while in configuration grant type 2, the TB size is dynamically set.

[0095] Therefore, in this embodiment, the base station 100 (eg, the DFI generating unit 106 ) calculates the size (eg, the number of bits) of the HARQ-ACK information included in the DFI according to the configured grant type.

[0096] [DFI information generation method]

[0097] An example of a method for generating HARQ-ACK information included in DFI in the DFI generating unit 106 of the base station 100 will be described below.

[0098] DFI (eg, DFI bit string) includes, for example, a HARQ-ACK bit string and a bit string of other control information (eg, a transmit power control command (TPC (Transmit Power Control) command) or precoding information, etc.).

[0099] In the case where the base station 100 uses a control channel dedicated to the terminal 200 (eg, a UE-specific PDCCH) to send the DFI, for example, Figure 6 As shown, the base station 100 transmits a DFI bit string corresponding to one terminal 200 (eg, UE#0) using the PDCCH.

[0100] On the other hand, in the case where the base station 100 transmits the DFI using a control channel (eg, GC-PDCCH) for a plurality of terminals 200, for example, Figure 7 As shown, the base station 100 uses the PDCCH to transmit a bit string in which the DFI bit strings of the multiple terminals 200 (for example, UE#0 and UE#1) are arranged. In the GC-PDCCH, for example, the starting position (starting bit position) of the DFI bit string sent to each terminal 200 and the size of the DFI (for example, the number of bits) are notified to the terminal 200 in advance by configuring the authorization setting information, or the terminal 200 determines based on the notified information.

[0101] In addition, the HARQ-ACK bit string may be, for example, in the form of a bitmap in which the HARQ-ACK bits of each HARQ process used in the configuration grant transmission are arranged in sequence.

[0102] Here, when the retransmission control of each CBG is not effective (for example, when sending HARQ-ACK for each TB), the base station 100 generates a HARQ-ACK bit string by treating the HARQ-ACK bit of each HARQ process (for example, each TB) as 1 bit. For example, when 2 processes are used in configuring grant type 1 and 4 processes are used in configuring grant type 2, and when these HARQ processes are different, the base station 100 generates a 6-bit HARQ-ACK bit string.

[0103] On the other hand, when retransmission control of each CBG is valid (for example, when HARQ-ACK is sent for each CBG), the base station 100 calculates the number of HARQ-ACK bits per TB based on the "configuration authorization type" set for the terminal 200 as follows.

[0104] For example, when the configuration grant type is configuration grant type 1, the base station 100 calculates the number of HARQ-ACK bits per 1TB based on the TB size of the PUSCH. For example, the base station 100 sets the number of HARQ-ACK bits per 1TB to the same value as the number of CBGs determined based on the number of CBs calculated from the TB size. For example, when the maximum number of CBGs is 4, when the number of CBs determined based on the TB size is 2, the number of CBGs used by the terminal 200 is set to 2, and therefore, the base station 100 sets the number of HARQ-ACK bits per 1TB to 2 bits, which is the same number as the number of CBGs (in other words, the number of CBs).

[0105] In configuration grant type 1, MCS and frequency resource allocation are semi-statically determined using high-layer signaling. This means that in configuration grant type 1, the TB size is set semi-statically. Therefore, in configuration grant type 1, the number of CBGs actually used by the terminal 200 is also set semi-statically. Therefore, in configuration grant type 1, when the number of CBs is less than the maximum number of CBGs, it is not necessary to ensure the number of HARQ-ACK bits equivalent to the maximum number of CBGs, but it is sufficient to ensure the number of bits equivalent to the number of CBs.

[0106] On the other hand, when the configuration grant type is configuration grant type 2, the base station 100 calculates the number of HARQ-ACK bits per 1TB based on the set maximum number of CBGs. For example, the base station 100 sets the number of HARQ-ACK bits per 1TB to the same value as the maximum number of CBGs. For example, when the maximum number of CBGs is 4, the base station 100 sets the number of HARQ-ACK bits per 1TB to 4 bits, which is the same number as the maximum number of CBGs.

[0107] In configuration grant type 2, MCS and frequency resource allocation can be changed dynamically according to activation or reactivation (Reactivation) using PDCCH. This means that in configuration grant type 2, the TB size is dynamically changeable. Therefore, in configuration grant type 2, the number of CBGs actually used by terminal 200 is also dynamically changeable, and the number of HARQ-ACK bits corresponding to the number of CBGs is also dynamically changeable. Therefore, in configuration grant type 2, HARQ-ACK bits equivalent to the maximum number of CBGs are ensured.

[0108] In addition, when the HARQ process is shared by configuration grant type 1 and configuration grant type 2, the base station 100 may set the number of HARQ-ACK bits per 1TB to the same value as the maximum number of CBGs. The reason is that in configuration grant type 2, it is possible to send HARQ-ACK equivalent to the maximum number of CBGs, so it is necessary to ensure HARQ-ACK bits equivalent to the maximum number of CBGs.

[0109] In addition, the DFI analysis unit 206 of the terminal 200 analyzes the DFI based on the same method as the DFI generation method including the HARQ-ACK information in the base station 100 described above.

[0110] Thus, in this embodiment, the base station 100 determines the transmission method of the DFI including the HARQ-ACK information for the uplink data based on the setting (e.g., configuration grant type) of the resource allocation (e.g., configuration grant) set for the terminal 200, and transmits the DFI based on the determined transmission method. In addition, the terminal 200 receives the DFI from the base station 100, and analyzes the DFI based on the setting of the configuration grant of the terminal 200.

[0111] For example, the base station 100 and the terminal 200 determine the number of bits used to send HARQ-ACK information per 1TB according to the configuration grant type and the allocation of the HARQ process. Thus, the number of bits used to send HARQ-ACK information is appropriately set according to the configuration grant type. According to this embodiment, for example, the number of HARQ-ACK bits used can be reduced compared to the case where the number of HARQ-ACK bits equivalent to the maximum number of CBGs is always ensured.

[0112] As described above, according to the present embodiment, the base station 100 can appropriately provide feedback with respect to the transmission of uplink data by the terminal 200 .

[0113] In addition, the present embodiment can also be applied to the case where the number of HARQ-ACK bits per TB is set independently of the maximum number of CBGs. For example, the present embodiment can be similarly applied to the following cases: the number of HARQ-ACK bits per 1TB configured with grant type 2 is set to the normal number of bits, and the number of HARQ-ACK bits per 1TB configured with grant type 1 is set to the number of bits calculated according to the TB size; the number of HARQ-ACK bits per 1TB configured with grant type 2 is greater than the number of HARQ-ACK bits per 1TB configured with grant type 1; or the number of HARQ-ACK bits per 1TB configured with grant type 2 is greater than the number of HARQ-ACK bits per 1TB configured with grant type 1.

[0114] In addition, in this embodiment, the number of HARQ-ACK bits per 1TB in the configuration authorization type 2 is not limited to the maximum number of CBGs, for example, it can also be selected from multiple candidate values ​​(for example, 2, 4, 6, 8).

[0115] (Implementation Method 2)

[0116] In configuration grant type 2, when configuration grant transmission is not activated by notification of activation information of PDCCH, the terminal does not transmit PUSCH. When the terminal does not transmit PUSCH, HARQ-ACK information is not required. However, when resources are semi-statically allocated using high-layer signaling, it is assumed that even if HARQ-ACK information is not required, resources (e.g., bits) for HARQ-ACK information are still ensured.

[0117] As an example, Figure 8 As shown, the allocation of DFI bits for ensuring 3-bit HARQ-ACK bits for configuration grant type 1 and configuration grant type 2 respectively. Figure 8 In the case where configuration authorization type 2 is not activated, the 3 bits corresponding to the HARQ-ACK information used to configure authorization type 2 are in a state of being unused but ensured.

[0118] In this way, when the grant type 2 is configured for the terminal setting, there may be resources that are secured for HARQ-ACK information but are not used.

[0119] In addition, the resources that are guaranteed but not used are not limited to Figure 8 The configuration grant type 1 and grant type 2 are mixed. For example, when the configuration grant type 1 is not set but the configuration grant type 2 is set (for example, when more than one configuration grant type 2 is set by higher layer signaling), the same is true (not shown).

[0120] Therefore, in this embodiment, a method of reducing the redundant resources not used for the HARQ-ACK information as described above will be described.

[0121] The basic structure of the base station and the terminal of this embodiment is the same as that of the base station 100 and the terminal 200 of Embodiment 1, and therefore, the base station and the terminal of this embodiment are referred to as follows. Figure 3 and Figure 4 Provide explanation.

[0122] For example, the control related to DFI transmission in the base station 100 (for example, the DFI generating unit 106) and the terminal 200 (for example, the DFI analyzing unit 206) will be described. Next, the DFI division method 1 and the DFI division method 2 will be described respectively.

[0123] [Division method 1]

[0124] In the segmentation method 1, the base station 100 segments the DFI by using different identifiers (eg, RNTI: Radio Network Temporary Identifier) ​​according to the configuration grant type and the configuration grant transmission related settings (Configured grant configuration).

[0125] When determining each configuration grant setting, base station 100 sets different RNTIs and allocation start positions of DFI bits in PDCCHs according to the configuration grant setting.

[0126] For example, Fig. 9 As shown, the base station 100 allocates the DFIs corresponding to the configuration grant type 1 and the configuration grant type 2 to different PDCCHs. Fig. 9 In the case of configuring grant type 1, the base station 100 sends a PDCCH including a CRC (Cyclic Redundancy Check), which is a CRC scrambled using the RNTI used for configuring grant type 1. Fig. 9 For configuration grant type 2, the base station 100 sends a PDCCH including a CRC, which is a CRC scrambled using the RNTI used for configuration grant type 2.

[0127] In other words, the base station 100 uses different PDCCHs (in other words, control information) to send DFI (feedback information) according to the configuration grant settings (eg, configuration grant type). In addition, each PDCCH is scrambled using a different identifier (here, RNTI) according to the configuration grant settings.

[0128] exist Fig. 9In the example shown, for example, when the configuration grant type 2 is not activated, the terminal 200 may not receive the PDCCH using the RNTI for configuring the grant type 2. Therefore, when the configuration grant type 2 is not activated, when the other bits of the PDCCH for configuring the grant type 2 are not used by other terminals 200, the base station 100 can stop sending the PDCCH for configuring the grant type 2. In addition, even when the other bits of the PDCCH for configuring the grant type 2 are used by other terminals 200, the base station 100 can stop sending the PDCCH for configuring the grant type 2. Fig. 9 3 bits in the PDCCH) are used for allocating information sent to other terminals 200. This can improve the utilization efficiency of PDCCH resources.

[0129] In addition, the above example is explained using GC-PDCCH as an example. By using GC-PDCCH, the base station 100 can, for example, centrally send DFIs for multiple terminals 200. However, it is not limited to GC-PDCCH, and UE-specific PDCCH can also be used to send DFI. The same effect as GC-PDCCH can be obtained by using UE-specific PDCCH. In addition, in the case of UE-specific PDCCH, resources (for example, bits of PDCCH) allocated for DFI of each terminal 200 will not be shared with other terminals 200. Thus, for example, the base station 100 can stop PDCCH transmission when the configuration authorization type 2 is not activated.

[0130] In addition, it is not limited to the case where configuration grant type 1 and configuration grant type 2 coexist. For example, even when configuration grant type 1 is not set and configuration grant type 2 is set (for example, when multiple configuration grant types 2 are set by high-layer signaling), the base station 100 can also allocate different RNTIs according to the configuration grant settings. As a result, the base station 100 sends the PDCCH corresponding to the activated configuration grant type 2 and stops sending the PDCCH corresponding to the inactivated configuration grant type 2. In addition, the terminal 200 can receive the PDCCH corresponding to the activated configuration grant among the set configuration grants.

[0131] In addition, it is not limited to the case where one RNTI corresponds to each configuration authorization setting. For example, one RNTI may correspond to multiple configuration authorization settings. By making multiple configuration authorization settings correspond to one RNTI, the number of RNTIs used can be reduced, thereby reducing the false detection of PDCCH (FAR: False alarm rate). In addition, when the HARQ process is shared between multiple configuration authorization settings, the base station 100 can non-repeatedly send the HARQ-ACK corresponding to each configuration authorization setting, thereby improving the efficiency of the use of PDCCH resources. In addition, the base station 100 can non-repeatedly send control information (for example, TPC commands) that does not correspond to the configuration authorization setting, thereby improving the efficiency of the use of PDCCH resources.

[0132] Thus, in the segmentation method 1, the base station 100 uses different RNTIs to segment the DFI according to the configuration grant type and the configuration grant setting.

[0133] [Division method 2]

[0134] In the segmentation method 2, the base station 100 sets an identification bit (in other words, an identifier field) for the DFI, and makes different values ​​correspond to the identification bit according to the configured grant type and the configured grant configuration, thereby segmenting different DFIs.

[0135] When determining each configuration grant setting, base station 100 sets different identification bit values ​​and allocation start positions of DFI bits in PDCCH for each configuration grant setting.

[0136] For example, the base station 100 allocates DFI to different PDCCHs according to the configuration authorization settings. Fig.10 In the example shown, the base station 100 allocates the DFIs corresponding to the configuration grant #0 and the configuration grant #1 to different PDCCHs. Fig.10 In each PDCCH shown, an identification bit (bit #2) is provided. Fig.10 In the example shown, the identification bit=0 corresponds to configuration authorization #0, and the identification bit=1 corresponds to configuration authorization #1.

[0137] In other words, base station 100 transmits DFI (feedback information) using different PDCCHs (in other words, control information) according to configuration grant settings (eg, configuration grant type). In addition, each PDCCH includes information indicating the configuration grant settings (here, identification bits).

[0138] For example, when the terminal 200 is allowed to receive a plurality of PDCCHs of the same RNTI, the terminal 200 can simultaneously receive the DFIs allocated to the different PDCCHs.

[0139] In addition, Fig.10 In the example shown, for example, when configuration grant #0 is not activated, terminal 200 may not receive the PDCCH corresponding to configuration grant #0 (in other words, the PDCCH containing the DFI whose identification bit value is 0). Therefore, base station 100 may also stop sending the PDCCH corresponding to configuration grant #0 in the same way as in segmentation method 1. Alternatively, base station 100 may use the idle bits ( Fig.10 The 3 bits in the PDCCH are used to allocate information to other terminals 200. This can improve the efficiency of using PDCCH resources.

[0140] In addition, similar to segmentation method 1, DFI can be sent not only on GC-PDCCH but also on UE-specific PDCCH. In addition, similar to segmentation method 1, configuration grant type 1 and configuration grant type 2 can be mixed, or configuration grant #1 can be omitted and multiple configuration grant types 2 can be set.

[0141] In addition, it is not limited to the case where one DFI (in other words, identification bit) corresponds to each configuration authorization setting. For example, one DFI may correspond to multiple configuration authorization settings. By making one DFI correspond to multiple configuration authorization settings, the overhead of identification bits can be reduced. In addition, in the case where the HARQ process is shared between multiple configuration authorization settings, the base station 100 may not repeatedly send the HARQ-ACK corresponding to each configuration authorization setting, thereby improving the efficiency of the use of PDCCH resources. In addition, the base station 100 may not repeatedly send control information (for example, TPC commands) that does not correspond to the configuration authorization setting, thereby improving the efficiency of the use of PDCCH resources.

[0142] In addition, in segmentation method 2, for example, Fig.11 As shown, the base station 100 may also allocate DFIs corresponding to multiple configuration grant settings to one PDCCH. In this case, the base station 100 may not send multiple PDCCHs when sending multiple DFIs to the terminal 200 at the same time, thereby reducing the use of PDCCH resources. In addition, the base station 100 can use bits at the bit positions corresponding to the inactivated configuration grants, for example, for information allocated to other terminals 200, thereby improving the use efficiency of PDCCH resources.

[0143] As described above, in the division method 2, the base station 100 provides the identification bit for the DFI, and makes different values ​​correspond to the identification bit according to the configuration grant type and the configuration grant setting, thereby dividing the DFI.

[0144] Here, if the number of RNTIs monitored by the terminal 200 increases, the CRC may unexpectedly become OK, and the possibility of misdetection of the PDCCH will increase. In contrast, the segmentation method 2 has the following advantages: because the number of RNTIs monitored by the terminal 200 does not increase depending on the number of configuration authorizations, the false detection rate (FAR: False alarm rate) of the PDCCH does not increase. In other words, the segmentation method 2 can reduce the FAR of the PDCCH compared to the segmentation method 1.

[0145] In the above, the DFI division method 1 and the DFI division method 2 are described.

[0146] Thus, in segmentation method 1 and segmentation method 2, for example, when HARQ-ACK information is sent, the base station 100 allocates the DFI bit to the PDCCH corresponding to the corresponding configuration authorization setting. On the other hand, when HARQ-ACK information is not sent (for example, when configuration authorization type 2 is not activated), the base station 100 does not send the PDCCH corresponding to the corresponding configuration authorization setting. Thus, the utilization efficiency of PDCCH resources can be improved. In other words, resources that are not used by HARQ-ACK information and are unnecessarily ensured can be reduced.

[0147] [Dynamic Change of DFI Bit Allocation]

[0148] For example, the base station 100 semi-statically sets the DFI bit allocation of each terminal 200. For example, the base station 100 semi-statically sets the allocation start position of each DFI of the terminal 200 and the RNTI (however, if necessary) using higher layer signaling.

[0149] In addition, for example, the base station 100 may also dynamically set the DFI bit allocation for each terminal 200. For example, the base station 100 uses high-layer signaling to set multiple candidates for the DFI allocation start positions and RNTI (if necessary) for the terminal 200. Then, the base station 100 uses the PDCCH for activating / releasing the configuration grant to notify the terminal 200 of information (for example, an index value) indicating the candidate set for the terminal 200 among the multiple candidates. In this way, the number of bits used in the PDCCH can be reduced, and the DFI bits can be dynamically allocated.

[0150] Fig.12 An example of DFI bit allocation is shown.

[0151] exist Fig.12 For example, the allocation start position of the DFI (starting position in PDCCH) and the RNTI are made to correspond to index values ​​(0 to 3), respectively. The information related to these correspondences is notified to the terminal 200 by the base station 100, for example, using high-layer signaling. The base station 100 uses PDCCH to notify the terminal 200 of the index value corresponding to the allocation start position and RNTI (if necessary) actually used for the allocation of the DFI bit. The terminal 200 determines the allocation start position and RNTI of the DFI bit based on the index value notified by the base station 100.

[0152] For example, in Fig.12 In the example of , in order to allocate DFI bits, it is sufficient to set a 2-bit field in PDCCH.

[0153] Fig.13 Shows other examples of DFI bit allocation.

[0154] exist Fig.13 In, for example, the allocation start position of the DFI bit and the RNTI correspond to dedicated index values, respectively. Fig.13 In this case, the base station 100 can control the allocation start position and RNTI exclusively, and therefore can allocate the DFI bits more flexibly.

[0155] For example, in Fig.13 In the example of , in order to allocate the DFI bit, it is sufficient to set a 3-bit field (2 bits for the allocation start position and 1 bit for the RNTI) in the PDCCH.

[0156] Furthermore, when there are sufficient PDCCH bits, base station 100 may directly notify terminal 200 of the DFI bit allocation start position (or RNTI) using PDCCH, without setting DFI bit allocation candidates using higher layer signaling.

[0157] In addition, the allocation start position may not be notified in bit units, but may be notified in group units (eg, group numbers) obtained by grouping a plurality of bits with a specific number of bits.

[0158] In addition, in configuration grant type 2, whether terminal 200 needs DFI changes dynamically according to activation and release. In contrast, as described above, by dynamically allocating DFI bits, base station 100 can dynamically allocate DFI to idle resources, thereby improving the utilization efficiency of PDCCH resources.

[0159] In addition, the above-mentioned dynamic allocation of DFI bits is not limited to DFI, and can also be applied to other GC-PDCCHs with terminal-specific or terminal group-specific bit allocation. Other GC-PDCCHs include, for example, TPC commands (notified using DCI formats 2_2 and 2_3) or SFI (Slot Format Indicator, time slot format indicator. Notified using DCI format 2_0). In this case, similarly to the DFI bit allocation, the base station 100 uses high-layer signaling to notify the terminal 200 of the candidate allocation start position, and uses PDCCH to notify the candidate index used for implementation.

[0160] In addition, in this case, in order to set the PDCCH independently of the configuration authorization, a PDCCH for dynamic setting different from the PDCCH for activating or releasing the configuration authorization can be defined separately. In the PDCCH for dynamic setting, a specific field is set to a value of a specific pattern, similarly to the PDCCH for activating / releasing the configuration authorization. At this time, in the PDCCH for dynamic setting, for example, a value of a pattern different from that of the PDCCH for activating / releasing the configuration authorization or the RNTI used is used. Thus, the terminal 200 can distinguish the PDCCH for dynamic setting. In addition, in the case of a sufficient number of PDCCH bits, the base station 100 can also use the PDCCH to directly notify the terminal 200 of the allocation start position without using high-layer signaling to set the candidate. In this way, by dynamically setting the allocation start position for the GC-PDCCH with terminal-specific or terminal group-specific bit allocation, the base station 100 can dynamically configure the GC-PDCCH to the idle resources, thereby improving the utilization efficiency of the PDCCH resources.

[0161] Furthermore, the information to be dynamically allocated is not limited to the TPC command and SFI described above, but may be other information (for example, information set to be dedicated to the UE, etc.).

[0162] (Implementation method 3)

[0163] In this embodiment, similarly to the second embodiment, an operation when configuration authorization type 2 is not activated will be described.

[0164] The basic structure of the base station and the terminal of this embodiment is the same as that of the base station 100 and the terminal 200 of Embodiment 1, and therefore, the base station and the terminal of this embodiment are referred to as follows. Figure 3 and Figure 4 Provide explanation.

[0165] [DFI replacement method]

[0166] An example of a DFI replacement method in the base station 100 (for example, the DFI generation unit 106 ) is described below. The terminal 200 (for example, the DFI analysis unit 206 ) also performs DFI analysis based on the same DFI replacement method as the base station 100 .

[0167] For example, when the configuration grant type 2 is not activated, the base station 100 replaces the bits of the DFI allocated for the configuration grant type 2 with other control information.

[0168] For example, the base station 100 may replace the DFI with other configuration authorized precoding information or TPC commands, etc. Thus, the base station 100 can send feedback information to the terminal 200 in a manner set to a transmission method corresponding to the current communication state or propagation path, thereby improving the reception quality of the base station 100.

[0169] Alternatively, the base station 100 may replace the DFI with a sounding reference signal request (SRS (Sounding Reference Signal) request) or a channel state information request (CSI (Channel State Information) request), etc. Thus, the base station 100 can trigger the transmission of a signal or information for the terminal 200 to grasp the current communication state.

[0170] Thus, according to this embodiment, the base station 100 transmits other control information using bits allocated to the DFI that are not used when not activated. This can improve the reception quality of the base station 100 without increasing the number of PDCCH bits, thereby improving the utilization efficiency of PDCCH resources.

[0171] In addition, the information replaced with DFI is not limited to precoding information, TPC commands, SRS requests, and CSI requests, but may also be other information.

[0172] In the above, one embodiment of the present invention has been described.

[0173] (Other embodiments)

[0174] In addition, the number of CBGs may be set using high-level signaling (eg, RRC signaling or MAC (Medium Access Control) signaling), or the number of CBGs may be pre-set according to specifications.

[0175] The above-mentioned embodiment can also be applied to the following case, for example, that is, in the case of carrier aggregation (CA), the base station 100 centrally sends the HARQ-ACK of multiple component carriers (CC) to the terminal 200. In the case of centrally sending the HARQ-ACK of multiple CCs, more PDCCH resources are required, so by applying this embodiment, the utilization efficiency of PDCCH resources can be improved.

[0176] The present invention can be implemented by software, hardware or software in cooperation with hardware. Each functional block used in the description of the above-mentioned embodiment is partially or entirely implemented as an LSI (Large Scale Integration) as an integrated circuit, and each process described in the above-mentioned embodiment can also be partially or entirely controlled by an LSI or a combination of LSIs. LSI can be composed of individual chips, or it can be composed of a chip in a manner that includes part or all of the functional blocks. LSI can also include the input and output of data. LSI can also be called "IC (Integration Circuit)", "System LSI (System LSI)", "Super LSI (Super LSI)", "Ultra LSI (Ultra LSI)" according to the different integration levels. The method of integrated circuitization is not limited to LSI, and can also be implemented by a dedicated circuit, a general-purpose processor or a dedicated processor. In addition, it is also possible to utilize an FPGA (Field Programmable Gate Array) that can be programmed after LSI manufacturing, or a reconfigurable processor (Reconfigurable Processor) that can reconfigure the connection or setting of the circuit block inside the LSI. The present invention can also be implemented as digital processing or analog processing. Furthermore, if integrated circuit technology that replaces LSI emerges as semiconductor technology advances or other technologies emerge, it is of course possible to use other technologies to achieve integration of functional blocks. There is also the possibility of applying biotechnology, etc.

[0177] The present invention can be implemented in all kinds of devices, equipment, and systems (collectively referred to as "communication devices") having communication functions. Non-limiting examples of communication devices include telephones (mobile phones, smart phones, etc.), tablet computers, personal computers (PCs) (laptops, desktops, notebook computers, etc.), cameras (digital cameras / digital video cameras, etc.), digital players (digital audio / video players, etc.), wearable devices (wearable cameras, smart watches, tracking devices, etc.), game consoles, e-book readers, telehealth / telemedicine (telehealth / medical prescription) devices, vehicles or transportation vehicles with communication functions (cars, airplanes, ships, etc.), and combinations of the above devices.

[0178] Communication devices are not limited to portable or movable devices, but also include all kinds of devices, equipment, and systems that cannot be carried or fixed, such as smart home devices (home appliances, lighting equipment, smart meters or meters, control panels, etc.), vending machines, and all other "things" that can exist on the IoT (Internet of Things) network.

[0179] The communication includes data communication performed by a cellular system, a wireless LAN (Local Area Network) system, a communication satellite system, etc., and also includes data communication performed by a combination of these systems.

[0180] In addition, the communication device also includes devices such as controllers or sensors connected or linked to the communication device that performs the communication function described in the present invention. For example, it includes a controller or sensor that generates a control signal or data signal used by the communication device that performs the communication function of the communication device.

[0181] In addition, the communication device includes infrastructure equipment that communicates with the above-mentioned non-limiting various devices or controls the above-mentioned various devices, such as base stations, access points and all other devices, equipment, and systems.

[0182] A base station according to an embodiment of the present invention includes:

[0183] A control circuit determines a method for transmitting feedback information including a response signal for uplink data based on a resource allocation setting set for a terminal; and a transmission circuit transmits the feedback information based on the transmission method.

[0184] In the base station of one embodiment of the present invention, the configuration includes a type of the resource allocation, and the control circuit determines the number of bits used to transmit the response signal based on the type.

[0185] In a base station of one embodiment of the present invention, the control circuit determines the number of bits based on the size of the transmission block of the uplink data when the category is the first category, and determines the number of bits based on the maximum number of code block groups constituting the transmission block when the category is a second category different from the first category.

[0186] In a base station of an embodiment of the present invention, the sending circuit uses different control information to send the feedback information according to the setting.

[0187] In a base station of an embodiment of the present invention, according to the setting, different identifiers are used to scramble the control information.

[0188] In a base station of an embodiment of the present invention, the control information includes information indicating the setting.

[0189] A terminal according to an embodiment of the present invention includes: a receiving circuit that receives feedback information including a response signal for uplink data from a base station; and a control circuit that analyzes the feedback information based on a set resource allocation setting.

[0190] A communication method according to an embodiment of the present invention comprises the following steps: a step of determining a method for sending feedback information based on a resource allocation setting for a terminal, the feedback information including a response signal for uplink data; and a step of sending the feedback information based on the sending method.

[0191] A communication method according to an embodiment of the present invention includes the following steps: a step of receiving feedback information including a response signal for uplink data from a base station; and a step of analyzing the feedback information based on a set resource allocation setting.

[0192] The disclosure of Japanese Patent Application No. 2019-001857 filed on January 9, 2019, including the specification, drawings, and abstract, is incorporated herein by reference in its entirety.

[0193] Industrial Applicability

[0194] One embodiment of the present invention is useful for a mobile communication system.

[0195] Description of Reference Numerals

[0196] 100 Base Stations

[0197] 101, 201 Receiving Department

[0198] 102, 202 Demodulation / decoding unit

[0199] 103 Dispatching Department

[0200] 104, 208 Sending control unit

[0201] 105, 207 Control Information Retention Unit

[0202] 106 DFI Generation Department

[0203] 107 Signaling information generation unit

[0204] 108 Activation information generating unit

[0205] 109, 210 Coding / Modulation Unit

[0206] 110, 211 Sending Department

[0207] 200 Terminal

[0208] 203 Extraction Department

[0209] 204 Signaling Information Analysis Department

[0210] 205 Activation Information Analysis Department

[0211] 206 DFI Analysis Department

[0212] 209 Sending data generation unit

Claims

1. A base station, comprising: A sending circuit, sending feedback information to the user equipment UE on a physical downlink control channel PDCCH dedicated to the user equipment UE, wherein the feedback information includes a response signal for uplink data; and A receiving circuit receives a retransmission based on the feedback information and the configuration authorization setting information; The feedback information indicates the HARQ-ACK information of each HARQ process by using a bitmap.

2. The base station according to claim 1, wherein the feedback information comprises first HARQ-ACK information of the first configuration grant transmission and second HARQ-ACK information of the second configuration grant transmission, The first configuration authorization transmission is operated through high-layer signaling, and The second configuration grant transmission is operated by activating downlink control information DCI after transmission of higher layer signaling. 3 . The base station according to claim 2 , wherein the UE-specific PDCCH is scrambled by using a Radio Network Temporary Identifier (RNTI) corresponding to both the first configuration grant transmission and the second configuration grant transmission. 4 . The base station of claim 2 , wherein the UE-specific PDCCH comprises identification bits associated with the first configuration grant transmission and the second configuration grant transmission. 5 . The base station according to claim 1 , wherein each bit of the bitmap indicates ACK or NACK of one HARQ process, respectively.

6. The base station according to claim 2, wherein: Allocation information of the feedback information is indicated by the UE-specific PDCCH.

7. A terminal, comprising: A receiving circuit receives feedback information from a base station on a physical downlink control channel PDCCH dedicated to a user equipment UE, wherein the feedback information includes a response signal for uplink data; and A sending circuit, performing retransmission based on the feedback information and configuration authorization setting information; The feedback information indicates the HARQ-ACK information of each HARQ process by using a bitmap.

8. The terminal according to claim 7, wherein The feedback information includes first HARQ-ACK information of the first configuration authorization transmission and second HARQ-ACK information of the second configuration authorization transmission, The first configuration authorization transmission is operated through high-layer signaling, and The second configuration grant transmission is operated by activating downlink control information DCI after receiving higher layer signaling. 9 . The terminal according to claim 8 , wherein the UE-specific PDCCH is scrambled with a Radio Network Temporary Identifier (RNTI) corresponding to both the first configuration grant transmission and the second configuration grant transmission. 10 . The terminal according to claim 8 , wherein the UE-specific PDCCH includes identification bits associated with the first configuration grant transmission and the second configuration grant transmission.

11. The terminal according to claim 7, wherein each bit of the bitmap indicates ACK or NACK of one HARQ process respectively. 12 . The terminal according to claim 7 , wherein allocation information of the feedback information is indicated by the UE-specific PDCCH.

13. A communication method, comprising: Sending feedback information to the UE on a physical downlink control channel PDCCH dedicated to the user equipment UE, wherein the feedback information includes a response signal for uplink data; and receiving a retransmission based on the feedback information and the configuration authorization setting information; The feedback information indicates the HARQ-ACK information of each HARQ process by using a bitmap.

14. The communication method according to claim 13, wherein The feedback information includes first HARQ-ACK information of the first configuration authorization transmission and second HARQ-ACK information of the second configuration authorization transmission, The first configuration authorization transmission is operated through high-layer signaling, and The second configuration grant transmission is operated by activating downlink control information DCI after transmission of higher layer signaling. 15 . The communication method according to claim 14 , wherein the UE-specific PDCCH is scrambled by using a Radio Network Temporary Identifier (RNTI) corresponding to both the first configuration grant transmission and the second configuration grant transmission.

16. The communication method of claim 14, wherein the UE-specific PDCCH includes identification bits associated with the first configuration grant transmission and the second configuration grant transmission.

17. The communication method according to claim 13, wherein each bit of the bitmap indicates ACK or NACK of one HARQ process respectively.

18. The communication method according to claim 14, wherein: Allocation information of the feedback information is indicated by the UE-specific PDCCH.

19. A communication method, comprising: receiving feedback information from a base station on a physical downlink control channel (PDCCH) dedicated to a user equipment (UE), wherein the feedback information includes a response signal for uplink data; and performing retransmission based on the feedback information and configuration authorization setting information; The feedback information indicates the HARQ-ACK information of each HARQ process by using a bitmap.

20. The communication method according to claim 19, wherein The feedback information includes first HARQ-ACK information of the first configuration authorization transmission and second HARQ-ACK information of the second configuration authorization transmission, The first configuration authorization transmission is operated through high-layer signaling, and The second configuration grant transmission is operated by activating downlink control information DCI after receiving higher layer signaling.

21. The communication method according to claim 20, wherein the UE-specific PDCCH is scrambled by using a Radio Network Temporary Identifier (RNTI) corresponding to both the first configuration grant transmission and the second configuration grant transmission.

22. The communication method of claim 20, wherein the UE-specific PDCCH includes identification bits associated with the first configuration grant transmission and the second configuration grant transmission.

23. The communication method according to claim 19, wherein each bit of the bitmap indicates ACK or NACK of one HARQ process, respectively.

24. The communication method according to claim 20, wherein: Allocation information of the feedback information is indicated by the UE-specific PDCCH.

25. An integrated circuit comprising: A sending circuit, controlling the sending of feedback information to the user equipment UE on a physical downlink control channel PDCCH dedicated to the user equipment UE, wherein the feedback information includes a response signal for uplink data; and A receiving circuit controls receiving retransmission based on the feedback information and configuration authorization setting information; The feedback information indicates the HARQ-ACK information of each HARQ process by using a bitmap.

26. An integrated circuit comprising: A receiving circuit, controlling to receive feedback information from a base station on a physical downlink control channel PDCCH dedicated to a user equipment UE, wherein the feedback information includes a response signal for uplink data; and A sending circuit controls retransmission based on the feedback information and configuration authorization setting information; The feedback information indicates the HARQ-ACK information of each HARQ process by using a bitmap.

Images