WO2018198351A1 - 端末装置、基地局装置、無線通信システム及び端末装置制御方法 - Google Patents
端末装置、基地局装置、無線通信システム及び端末装置制御方法 Download PDFInfo
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- WO2018198351A1 WO2018198351A1 PCT/JP2017/017039 JP2017017039W WO2018198351A1 WO 2018198351 A1 WO2018198351 A1 WO 2018198351A1 JP 2017017039 W JP2017017039 W JP 2017017039W WO 2018198351 A1 WO2018198351 A1 WO 2018198351A1
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- ack
- nack
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- resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
- H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1854—Scheduling and prioritising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1864—ARQ related signaling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1874—Buffer management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
- H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
- H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a terminal device, a base station device, a wireless communication system, and a terminal device control method.
- next generation communication standard such as 5G (Generation) (5th generation mobile communication
- 4G (4th generation mobile communication) further higher data rate, larger capacity
- a technology for realizing low delay is required.
- 3GPP 3rd Generation Partnership Project
- the 3GPP working groups include, for example, TSG (Technical Specification Group) -RAN (Radio Access Network) WG (Work Group) 1 and TSG-RAN WG2.
- the next generation communication system such as 5G is supposed to support many use cases.
- use cases include cases classified into eMBB (Enhanced Mobile BroadBand), Massive MTC (Machine Type Communications), and URLLC (Ultra-Reliable and Low Latency Communications).
- LTE Long Term Evolution
- HARQ hybrid automatic repeat request
- the receiving apparatus requests the transmitting apparatus side to retransmit the data that could not be correctly decoded in the processing of the layer 1 protocol layer such as LTE.
- the transmission apparatus transmits retransmission data corresponding to the original data retransmission request that could not be correctly decoded on the reception apparatus side.
- data decoding is performed by combining data that could not be correctly decoded and retransmission data. Thereby, highly efficient and highly accurate retransmission control is realized.
- the receiving device side realizes a retransmission request by transmitting Ack information to the transmitting device when it can be correctly decoded and Nack information when it cannot be decoded correctly.
- the feedback information of LTE Ack / Nack is performed, for example, at 1 bit per TTI (Transmission Time Interval) of 14 symbols.
- next generation 5G NR New Radio
- Ack / Nack feedback information in units of code block groups (CBG).
- CBG code block groups
- feedback information of Ack / Nack using CBG is performed at 1 bit per CBG unit.
- the number of symbols constituting the CBG and the number of symbols transmitting the Ack / Nack feedback information are values of 14 symbols or less, which is the number of 1 TTI symbols used in LTE, for example.
- the Ack / Nack feedback information in the CBG may increase the number of bits used for the Ack / Nack feedback information. Therefore, transmission power may increase. Furthermore, for example, when transmitting Ack / Nack feedback information and other information (for example, a scheduling request) at the same time, the transmission power becomes larger than when transmitting only information of Ack / Nack feedback information. Can be considered.
- the disclosed technique has been made in view of the above, and provides a terminal device, a base station device, a wireless communication system, and a terminal device control method that efficiently transmit information such as feedback information of Ack / Nack. With the goal.
- the receiving unit receives a radio signal from the base station device.
- the response signal generation unit generates a reception response for notifying a plurality of reception results of the radio signal by the reception unit.
- the transmission unit varies the size or position of the radio resource used for signal transmission between a case where a plurality of different types of signals including the reception response are transmitted at the same timing and a case where a single type of signal is transmitted. .
- the present invention can efficiently transmit information such as Ack / Nack feedback information.
- FIG. 1 is a block diagram of a terminal device.
- FIG. 2 is a diagram for explaining a CBG type feedback system.
- FIG. 3 is an example of a bit pattern representing Ack / Nack mapped to subcarriers.
- FIG. 4 is a diagram illustrating an example of values indicating Ack / Nack for two CBGs mapped to two resource blocks.
- FIG. 5 is a diagram illustrating an example in which two CBGs Ack / Nack are mapped to one subcarrier in one resource block.
- FIG. 6 is a diagram illustrating radio resource allocation.
- FIG. 7 is a diagram illustrating radio resource allocation by the terminal device according to the first embodiment.
- FIG. 8 is a block diagram of the base station apparatus.
- FIG. 1 is a block diagram of a terminal device.
- FIG. 2 is a diagram for explaining a CBG type feedback system.
- FIG. 3 is an example of a bit pattern representing Ack / Nack mapped to subcarriers.
- FIG. 9 is a flowchart of transmission of a reception response and a radio resource allocation request by the terminal device according to the first embodiment.
- FIG. 10 is a diagram illustrating radio resource allocation by the terminal device according to the second embodiment.
- FIG. 11 is a diagram illustrating an example of Ack / Nack for each CBG.
- FIG. 12 is a diagram illustrating an example of an unused resource table.
- FIG. 13 is a flowchart of transmission of a reception response and a radio resource allocation request by the terminal device according to the second embodiment.
- FIG. 14 is a diagram illustrating an example of the CBG group generated by the PUCCH generation unit according to the third embodiment.
- FIG. 15 is a diagram illustrating radio resource allocation by the terminal device according to the third embodiment.
- FIG. 10 is a diagram illustrating radio resource allocation by the terminal device according to the second embodiment.
- FIG. 11 is a diagram illustrating an example of Ack / Nack for each CBG.
- FIG. 12 is a diagram illustrating an
- FIG. 16 is a flowchart of transmission of a reception response and a radio resource allocation request by the terminal device according to the third embodiment.
- FIG. 17 is a diagram illustrating an example of a CBG group generated by the PUCCH generation unit according to the fourth embodiment, and a direct notification CBG and an indirect notification CBG.
- FIG. 18 is a diagram illustrating an example of a used resource table.
- FIG. 19 is a diagram illustrating radio resource allocation by the terminal device according to the fourth embodiment.
- FIG. 20 is a diagram illustrating radio resource allocation by the terminal device according to the fifth embodiment.
- FIG. 21 is a diagram illustrating an example of the CBG group generated by the PUCCH generation unit according to the sixth embodiment.
- FIG. 22 is a diagram illustrating radio resource allocation by the terminal device according to the sixth embodiment.
- FIG. 17 is a diagram illustrating an example of a CBG group generated by the PUCCH generation unit according to the fourth embodiment, and a direct notification CBG and an indirect notification CBG.
- FIG. 23 is a diagram for explaining the calculation of the number of Nacks in each resource block.
- FIG. 24 is a diagram illustrating radio resource allocation by the terminal device according to the seventh embodiment.
- FIG. 25 is a flowchart of transmission of a reception response and a radio resource allocation request by the terminal device according to the seventh embodiment.
- FIG. 26 is a diagram illustrating radio resource allocation in response to different types of radio resource allocation requests according to the eighth embodiment.
- FIG. 27 is a diagram illustrating radio resource allocation by the terminal device according to the ninth embodiment.
- FIG. 28 is a block diagram of a terminal apparatus according to the eleventh embodiment.
- FIG. 29 is a diagram illustrating allocation of radio resources when Ack / Nack for signals in different TTIs are collectively transmitted at the same timing.
- FIG. 30 is a hardware configuration diagram of the terminal device according to each embodiment.
- FIG. 31 is a hardware configuration diagram of the base station apparatus according to each embodiment.
- terminal device a terminal device, a base station device, a wireless communication system, and a terminal device control method disclosed in the present application will be described in detail with reference to the drawings. Note that the terminal device, base station device, wireless communication system, and terminal device control method disclosed in the present application are not limited by the following embodiments.
- FIG. 1 is a block diagram of the terminal device.
- the terminal device 1 transmits / receives data by wireless communication with a base station device 2 described later.
- the terminal device 1 and the base station device 2 use a CBG (Code Block Group) type feedback method as the HARQ feedback method.
- CBG Code Block Group
- the CBG type feedback system will be described below.
- FIG. 2 is a diagram for explaining a CBG type feedback system.
- the terminal apparatus 1 receives data from the base station apparatus 2 using a transport block 115 including CBGs (Code Block Groups) 111 to 113 in which a predetermined number of code blocks (CB: Code Block) 101 are collected as a basic unit.
- CBGs Code Block Groups
- CB Code Block
- FIG. 2 a collection of two code blocks 101 is referred to as CBGs 111 to 113, but the number of code blocks of CBGs 111 to 113 is not particularly limited.
- the CBGs 111 to 113 are not distinguished, they are represented as “CBG110”.
- the code block 101 corresponds to an example of “first group”.
- the CBG 110 is an example of a “second group”.
- the terminal device 1 includes a radio unit 11, a PDCCH (Physical Downlink Control Channel) reception processing unit 12, and a PDSCH (Physical Downlink Sheared Channel) reception processing unit 13. Further, the terminal device 1 includes an ACK (Acknowledgement) / NACK (Negative Acknowledgement) generation unit 14 and an SR (Scheduling Request) generation unit 15. Furthermore, a PUCCH (Physical Uplink Control Channel) generation unit 16, a PUSCH (Physical Uplink Sheared Channel) generation unit 17, and a buffer 18 are included.
- ACK Acknowledgement
- NACK Negative Acknowledgement
- SR Service Request
- the radio unit 11 receives PDCCH and PDSCH signals including control signals and data from the base station apparatus 2 via the antenna.
- the signal received by the wireless unit 11 includes a transport block 115 including a plurality of CBGs 110 as shown in FIG.
- the wireless unit 11 performs AD (Analog Digital) conversion on the received signal. Thereafter, the radio unit 11 outputs the received PDCCH and PDSCH signals to the PDCCH reception processing unit 12.
- AD Analog Digital
- the radio unit 11 receives an input of a signal representing ACK / NACK from the PUCCH generation unit 16. Next, the radio unit 11 performs DA (Digital Analog) conversion on a signal representing ACK / NACK. Thereafter, the radio unit 11 transmits a signal representing ACK / NACK to the base station apparatus 2 via the antenna.
- DA Digital Analog
- the radio unit 11 receives an input of a signal including data from the PUSCH generation unit 17. Next, the wireless unit 11 performs DA conversion on the signal including data. Thereafter, the radio unit 11 transmits a signal including data to the base station apparatus 2 via the antenna.
- the PDCCH reception processing unit 12 receives input of PDCCH and PDSCH signals including control signals and data from the radio unit 11. Then, the PDCCH reception processing unit 12 performs demodulation processing and decoding processing on the PDCCH signal to obtain a control signal. This control signal also includes radio resource allocation information. Thereafter, the PDCCH reception processing unit 12 outputs the PDSCH signal to the PDSCH reception processing unit 13 together with the control signal.
- the PDSCH reception processing unit 13 receives the input of the PDSCH signal from the PDCCH reception processing unit 12 together with the control signal. Next, the PDSCH reception processing unit 13 obtains data by performing demodulation processing and decoding processing on the PDCCH signal using MCS (Modulation and Coding Scheme) specified by the control signal.
- MCS Modulation and Coding Scheme
- the PDSCH reception processing unit 13 specifies the CBG 110 included in the data of one transport block 115. Then, the PDSCH reception processing unit 13 determines whether data has been decoded for each CBG 110 included in the transport block 115.
- the PDSCH reception processing unit 13 notifies the ACK / NACK generation unit 14 of the successful data decoding for the CBG 110 in which the data could be decoded. Further, the PDSCH reception processing unit 13 notifies the ACK / NACK generation unit 14 of the data decoding failure for the CBG 110 in which the data decoding has failed.
- the PDSCH reception processing unit 13 is an example of a “reception unit”.
- the ACK / NACK generation unit 14 receives from the PDSCH reception processing unit 13 a notification of success or failure of data decoding for each CBG 110. Then, the ACK / NACK generation unit 14 generates an Ack indicating a successful data decoding for each CBG 110 or a Nack indicating a failed data decoding.
- Ack / Nack information including one or both of Ack and Nack is represented as “Ack / Nack”.
- FIG. 3 is an example of a bit pattern representing Ack / Nack mapped to subcarriers.
- Ack / Nack for two CBGs # 1 and # 2 will be described.
- One resource block 121 and 122 includes 12 subcarriers. Each subcarrier has a value. Ack / Nack is transmitted to the base station apparatus 2 using the resource blocks 121 and 122 and the like. FIG. 3 shows whether the value of Ack / Nack for CBG # 1 or # 2 is included in each subcarrier.
- Resource block 121 represents the mapping of the Ack / Nack bit pattern when one resource block represents 1-bit Ack or Nack for CBG # 1.
- all the subcarriers excluding RS (Reference Signal) of the resource block 121 represent the values of Ack or Nack for CBG # 1. That is, if the value representing Ack is 0 and the value representing Nack is 1, when Ack is returned to CBG # 1, all the values other than RS are stored in the subcarriers included in the resource block 121. The When Nack is returned to CBG # 1, all the values other than RS are stored in the subcarriers included in the resource block 121.
- the ACK / NACK generation unit 14 sets the same value for the resource block 121 as an 8-bit bit.
- a sequence is generated as an Ack / Nack of CBG # 1.
- the base station apparatus 2 acquires Ack / Nack of CBG # 1 from one resource block 121 of the received signal.
- the resource block 122 represents the mapping of the Ack / Nack bit pattern when one resource block represents 1-bit Ack or Nack for each of the CBGs # 1 and # 2.
- a value representing Ack or Nack for CBG # 1 or a value representing Ack or Nack for CBG # 2 is stored in each subcarrier excluding RS of resource block 122.
- values representing Ack / Nack for CBG # 1 and values representing Ack / Nack for CBG # 2 are alternately arranged on subcarriers other than RS.
- Ack / Nack for each of the two CBGs # 1 and # 2 is represented by two resource blocks.
- the ACK / NACK generation unit 14 represents a bit sequence for two resource blocks representing Ack / Nack of CBG # 1 and # 2 when the value representing Ack is 0 and the value representing Nack is 1. 4 is generated.
- FIG. 4 is a diagram illustrating an example of values indicating Ack / Nack for two CBGs mapped to two resource blocks.
- the ACK / NACK generation unit 14 when the reception response of CBG # 1 is Ack and the reception response of CBG # 2 is Nack, the ACK / NACK generation unit 14 generates a bit sequence of “01010101,01010101”. In this case, the base station apparatus 2 acquires Ack / Nack for each of the CBGs # 1 and # 2 by adding the information of the two resource blocks 122 of the received signal.
- the ACK / NACK generation unit 14 increases the bit sequence pattern represented by 0 and 1. As described above, the ACK / NACK generation unit 14 can also generate Ack / Nack so that one resource block 121 represents information of Ack / Nack for one CBG 110. The ACK / NACK generation unit 14 can also generate Ack / Nack so that the plurality of resource blocks 121 represent Ack / Nack information for a plurality of CBGs 110.
- FIG. 5 is a diagram illustrating an example in which two CBGs Ack / Nack are mapped to one subcarrier in one resource block.
- the information on one subcarrier in FIG. 5 is, for example, 2-bit information when the subcarrier is modulated by quadrature phase shift keying (QPSK).
- QPSK quadrature phase shift keying
- the resource block 123 in FIG. 5 represents the mapping of the Ack / Nack bit pattern when transmitting Ack / Nack for two CBGs in one resource block.
- the subcarrier of the resource block 123 is 2 bits. All the subcarriers excluding the RS of the resource block 123 represent Ack or Nack values for CBG # 1 and # 2.
- each subcarrier is modulated by QPSK.
- the value representing Ack is 0 and the value representing Nack is 1
- the subcarrier included in the resource block 123 is returned.
- the value (0, 1) is stored in all except RS.
- the ACK / NACK generation unit 14 sets the same value for the resource block 123 as a 16-bit bit.
- a sequence is generated as Ack / Nack for CBG # 1 and # 2.
- the base station apparatus 2 acquires Ack / Nack of CBG # 1 and # 2 from one resource block 123 of the received signal.
- the resource block 124 in FIG. 5 represents the mapping of the Ack / Nack bit pattern when Ack / Nack for four CBGs is transmitted in one resource block.
- the subcarrier of the resource block 123 is 2 bits.
- a value representing Ack or Nack for CBG # 1 and # 2 or a value representing Ack or Nack for CBG # 3 and # 4 is stored.
- each subcarrier is modulated by QPSK.
- values representing Ack / Nack for CBG # 1 and # 2 and values representing Ack / Nack for CBG # 3 and # 4 are alternately arranged on subcarriers other than RS.
- one resource block represents Ack / Nack for each of the four CBGs # 1 to # 4.
- the ACK / NACK generation unit 14 is a 32-bit bit in which the same values are arranged for the resource block 124.
- a sequence is generated as Ack / Nack of CBGs # 1 to # 4.
- the base station apparatus 2 acquires Ack / Nack of CBGs # 1 to # 4 from one resource block 123 of the received signal.
- the resource block group 125 of FIG. 5 represents the mapping of the Ack / Nack bit pattern when transmitting the Ack / Nack for the four CBGs using two resource blocks.
- the subcarrier of the resource block group 125 is 2 bits.
- a value indicating Ack or Nack for CBG # 1 and # 2 or a value indicating Ack or Nack for CBG # 3 and # 4 is stored.
- each subcarrier is modulated by QPSK.
- values representing Ack / Nack for CBG # 1 and # 2 and values representing Ack / Nack for CBG # 3 and # 4 are alternately arranged on subcarriers other than RS.
- Ack / Nack for each of the four CBGs # 1 to # 4 is represented by two resource blocks.
- the ACK / NACK generation unit 14 has a 32-bit array of the same values for the resource block group 125.
- a bit sequence is generated as Ack / Nack of CBGs # 1 to # 4.
- the base station apparatus 2 acquires Ack / Nack of CBGs # 1 to # 4 from the two resource blocks 123 of the received signal.
- the ACK / NACK generation unit 14 collectively outputs the Ack and Nack for each CBG 110 to the PUCCH generation unit 16 as a reception response for one transport block 115.
- the ACK / NACK generation unit 14 is an example of a “response signal generation unit”.
- the buffer 18 includes a first buffer 181 and a second buffer 182.
- the first buffer 181 and the second buffer 182 store logical channel data divided according to required conditions such as delay and reliability, or QoS (Quality of Service).
- the first buffer 181 is a buffer for storing transmission data in low-latency and high-priority processing such as URLLC (Ultra-Reliable and Low Latency Communication).
- the second buffer 182 is a buffer for storing transmission data in a low priority process such as eMBB (Enhanced Mobile Brad Band) or web browsing.
- eMBB Enhanced Mobile Brad Band
- the SR generation unit 15 confirms whether transmission data is stored in the first buffer 181 or the second buffer 182. When transmission data is stored in the first buffer 181 or the second buffer 182, the SR generation unit 15 generates a radio resource allocation request for requesting allocation of radio resources for transmitting transmission data.
- the SR generation unit 15 outputs a radio resource allocation request to the PUCCH generation unit 16 together with information on the first buffer 181 or the second buffer 182 that is a transmission data storage source.
- the SR generation unit 15 corresponds to an example of a “radio resource allocation request generation unit”.
- the PUCCH generation unit 16 receives from the ACK / NACK generation unit 14 input of reception response information for one transport block 115 in which the ACK and NACK of each CBG 110 are collected. Further, the PUCCH generation unit 16 receives an input of a radio resource allocation request from the SR generation unit 15.
- radio resources allocated in advance to the reception response and the radio resource allocation request will be described.
- FIG. 6 is a diagram illustrating radio resource allocation. The vertical direction in FIG. 6 represents frequency, and the horizontal direction represents time.
- a section sandwiched between PDCCHs 202 is a TTI (Transmission Time Interval) 201.
- PDSCH 203 is transmitted / received after PDCCH 202.
- the radio resource 210 is a resource that is allocated in advance to the radio resource allocation request.
- wireless resource 220 is a resource previously allocated to the reception response.
- other units may be used as the transmission unit in this PUCCH.
- a signal may be transmitted in units of one symbol.
- the radio resources allocated in advance to the reception response and the radio resource allocation request illustrated in FIG. 6 are referred to as “normal radio resources”.
- the PUCCH generation unit 16 determines whether or not to send a reception response or a radio resource allocation request simultaneously in a certain TTI 201.
- a case where a reception response and a radio resource allocation request are transmitted at the same timing in a certain TTI 201 is referred to as “simultaneous transmission”.
- the simultaneous transmission is a case where the terminal device 1 transmits a reception response and a radio resource allocation request using the radio resource 210 and the radio resource 220 overlapping in the time direction.
- the PUCCH generation unit 16 performs encoding processing and modulation processing on data representing Ack / Nack that is a reception response or data representing a radio resource allocation request. Thereafter, the PUCCH generation unit 16 allocates normal radio resources to the data subjected to the encoding process and the modulation process.
- FIG. 7 is a diagram illustrating radio resource allocation by the terminal device according to the first embodiment.
- the vertical direction represents frequency and the horizontal direction represents time.
- the PUCCH generation unit 16 allocates radio resources as shown in an allocation state 311 in FIG. That is, the PUCCH generation unit 16 allocates the radio resource 220 of the resource blocks 301 to 303 to the reception response. In this case, the radio resource 210 of the resource block 300 is not allocated.
- the PUCCH generation unit 16 assigns the radio resource 210 of the resource block 300.
- the PUCCH generation unit 16 generates a signal by arranging data indicating Ack / Nack or data indicating a radio resource allocation request on the PUCCH according to radio resource allocation. Thereafter, the PUCCH generation unit 16 transmits the signal generated via the radio unit 11 to the base station apparatus 2. In this case, the PUCCH generation unit 16 transmits a radio resource allocation request to the base station apparatus 2 using the radio resource 210. Moreover, the PUCCH generation unit 16 transmits a reception response to the base station apparatus 2 using the radio resource 220.
- normal allocation state the state in which the reception response and the radio resource allocation request generated at the time of simultaneous transmission are allocated to the normal radio resource as in the case of not simultaneous transmission.
- the PUCCH generation unit 16 allocates radio resources as shown in an allocation state 312 in FIG. Specifically, the PUCCH generation unit 16 stores in advance information on resource blocks to be allocated to reception responses at the time of simultaneous transmission. That is, the PUCCH generation unit 16 stores in advance one excluded resource block among the resource blocks included in the normal radio resource of the reception response. Then, the PUCCH generation unit 16 allocates the radio resource 210 allocated to the radio resource allocation request in the normal allocation state to data representing Ack / Nack to which the excluded resource block is allocated in the normal allocation state.
- resource blocks other than the excluded resource block of the radio resource 220 are allocated to data representing Ack / Nack other than the data to which the radio resource 210 is allocated, similarly to the normal allocation state.
- the PUCCH generation unit 16 allocates the resource blocks 301 and 303 in the radio resource 220 to data representing Ack / Nack other than the data to which the radio resource 210 is allocated. In this case, the PUCCH generation unit 16 does not use the resource block 302.
- the PUCCH generating unit 16 notifies the base station apparatus 2 of the occurrence of SR by including unused resource blocks that do not transmit Ack / Nack in normal radio resources. .
- the base station apparatus 2 can easily detect that the unused resource block is sandwiched between the used resource blocks. Therefore, it is preferable that the PUCCH generation unit 16 selects an unused resource block such that an unused resource block is sandwiched between used resource blocks as in the allocation state 312.
- the content of the signal mapped to the radio resource 210 may be applied as it is.
- the used resource blocks in the radio resource 220 and the used resource blocks in the radio resource 210 are arranged in the order of frequency, and mapping is performed in the same manner as the transmission of Ack / Nack in the normal allocation state, that is, in order of increasing or decreasing frequency. May be.
- the PUCCH generation unit 16 determines whether the radio resource allocation request to be transmitted is a radio resource allocation request for transmission data stored in the first buffer 181 or the second buffer 182.
- the PUCCH generation unit 16 is different for transmission of transmission data in the high-priority processing stored in the first buffer 181 and transmission of transmission data in the high-priority processing stored in the second buffer 182. It has parameters for adjusting the transmission power density.
- the PUCCH generation unit 16 has a parameter for increasing the transmission power density as a parameter for transmission of transmission data stored in the first buffer 181. Further, the PUCCH generation unit 16 sets a parameter whose transmission power density is lower than that of transmission data stored in the first buffer 181 as a parameter in transmission of transmission data stored in the second buffer 182. Have.
- the parameter is, for example, an offset with respect to the transmission power density when a reception response is transmitted.
- the value of this parameter is specified by, for example, an RRC (Radio Resource Control) signal or PDCCH when notifying the PUCCH resource setting from the base station apparatus 2.
- RRC Radio Resource Control
- the PUCCH generation unit 16 If it is a radio resource allocation request for transmitting the transmission data stored in the first buffer 181, the PUCCH generation unit 16 increases the transmission power density of the radio resource allocated to the reception response as in the allocation state 312. . On the other hand, if it is a radio resource allocation request for transmission data in the low priority processing stored in the second buffer 182, the PUCCH generation unit 16 normally sets the transmission power density of the reception response as in the allocation state 312. Same as when sending the response of receiving.
- the PUCCH generation unit 16 transmits reception response data to the base station apparatus 2 via the radio unit 11 at the transmission power density determined using the allocated radio resource. As a result, the PUCCH generation unit 16 notifies the base station apparatus 2 of the generation of the radio resource allocation request together with the Ack / Nack information of each CBG 110.
- the PUCCH generation unit 16 even in the case of simultaneous transmission, if the transmission power is not insufficient due to the allocation in the normal allocation state, the PUCCH generation unit 16 always uses the radio in the normal allocation state as in the allocation state 313. Resources may be allocated. In this case, the PUCCH generation unit 16 uses all of the resource blocks 300 to 301.
- the radio resources for the normal allocation resource of the radio resource allocation request are not used. That is, the number of unused radio resources does not increase so much.
- a radio resource allocation request with a low priority may be transmitted with the same reliability as Ack / Nack, so that the transmission power can be sufficiently covered.
- the radio resource allocation request has a high priority, transmission with a higher transmission power density is desirable in order to increase reliability, and there is a possibility that transmission power shortage may occur.
- This PUCCH generation unit 16 is an example of a “transmission unit”.
- the PUSCH generation unit 17 acquires, from the PDCCH reception processing unit 12, radio resource information for transmitting transmission data specified by a response to the radio resource allocation request. Next, the PUSCH generation unit 17 acquires transmission data corresponding to the transmitted radio resource allocation request from the first buffer 181 or the second buffer 182 of the buffer 18.
- the PUSCH generation unit 17 performs encoding processing and modulation processing on the acquired transmission data.
- the PUSCH generation unit 17 assigns the specified radio resource to the transmission data subjected to the encoding process and the modulation process.
- the PUSCH generation unit 17 generates a signal by arranging transmission data on the PUSCH according to radio resource allocation.
- the PUSCH generation unit 17 transmits the signal generated via the radio unit 11 to the base station apparatus 2.
- FIG. 8 is a block diagram of the base station apparatus.
- the base station apparatus 2 includes a PUCCH resource management unit 21, a buffer 22, a scheduler 23, a downlink signal baseband processing unit 24, an uplink signal baseband processing unit 25, and a radio unit 26.
- the buffer 22 is a temporary storage area for transmission data acquired by the base station apparatus 2.
- the PUCCH resource management unit 21 notifies the scheduler 23 of resource setting information for requesting radio resource allocation and resource setting information for Ack / Nack.
- the PUCCH resource management unit 21 may periodically set the normal radio resource of the reception response for transmitting the radio resource allocation request and Ack / Nack at a predetermined cycle.
- the PUCCH resource management unit 21 may determine and set the normal radio resource of the reception response for transmitting the radio resource allocation request and Ack / Nack for each TTI.
- the scheduler 23 specifies data to be transmitted from the transmission data stored in the buffer 22. Then, the scheduler 23 schedules transmission of the specified data.
- the scheduler 23 divides the data of the transport block 115 to be transmitted into the CBG 110.
- the scheduler 23 determines the MCS to be used. For example, for the URLLC data, the scheduler 23 selects an MCS having a higher degree of redundancy than the eMBB data. Further, the scheduler 23 generates control information for data transmission / reception. Furthermore, the scheduler 23 determines radio resources for transmitting data and control information. Thereafter, the scheduler 23 outputs the information of each CBG 110 in the transport block 115 of the data to be transmitted, the information of MCS, the generated control information, and the information of the radio resource to be used to the downlink signal baseband processing unit 24.
- the scheduler 23 receives an input of 1-bit ACK or NACK from the uplink signal baseband processing unit 25 for each CBG 110. Further, the scheduler 23 receives an input of a radio resource allocation request from the uplink signal baseband processing unit 25.
- the scheduler 23 identifies the CBG 110 that has received the NACK among the CBGs 110 included in the transmitted transport block 115. Then, the scheduler 23 determines data to be retransmitted.
- the scheduler 23 generates control information. Furthermore, when a radio resource allocation request is received, the scheduler 23 determines a normal radio resource used for transmission data. In addition, the scheduler 23 determines radio resources used for data retransmission. Thereafter, the scheduler 23 outputs information on data to be retransmitted, information on MCS, generated control information, and information on radio resources to be used to the downlink signal baseband processing unit 24. The scheduler 23 repeats retransmission until ACK is received for all CBGs 110.
- the downlink signal baseband processing unit 24 receives input of information on data to be transmitted or retransmitted, information on MCS, control information, and information on radio resources to be used from the scheduler 23. Next, the downlink signal baseband processing unit 24 acquires from the buffer 22 data corresponding to the information of the received data to be transmitted or retransmitted. Next, the downlink signal baseband processing unit 24 performs encoding processing on the data and control information acquired using the encoding rate specified by the received MCS information. Further, the downlink signal baseband processing unit 24 performs modulation processing on the data and control information acquired using the modulation scheme specified by the received MCS information.
- the downlink signal baseband processing unit 24 allocates control information and data to the designated radio resource, arranges the control information on the PDCCH, and arranges the data on the PDSCH. Then, the downlink signal baseband processing unit 24 outputs control information and data to the radio unit 26.
- the radio unit 26 receives control information and data from the downlink signal baseband processing unit 24. Next, the wireless unit 26 performs DA (Digital to Analog) conversion on the control information and data. Thereafter, the radio unit 26 transmits a control signal and data to the terminal device 1 via the antenna using the allocated radio resource.
- DA Digital to Analog
- the radio unit 26 receives from the terminal device 1 a signal including one or both of a reception response of data transmitted via the antenna and a radio resource allocation request. Then, the wireless unit 26 performs AD (Analog to Digital) conversion on the received signal. After that, the radio unit 26 outputs a signal including either one or both of the reception response of the transmitted data and the radio resource allocation request to the uplink signal baseband processing unit 25.
- the radio unit 26 is an example of a “base station receiving unit”.
- the uplink signal baseband processing unit 25 performs a demodulation process and a decoding process on a signal including one or both of a reception response of the transmitted data and a radio resource allocation request. Then, the uplink signal baseband processing unit 25 determines whether or not Ack / Nack information is included in all resource blocks of the radio resource 220 in the received signal. When all the resource blocks of the radio resource 220 in the received signal include Ack / Nack information, that is, when no unused resource block is included, the uplink signal baseband processing unit 25 determines that the transmission is not simultaneous transmission. To do.
- the uplink signal baseband processing unit 25 acquires Ack / Nack information for each CBG 110 from the radio resource 220 which is a normal radio resource of the reception response.
- the uplink signal baseband processing unit 25 grasps the generation of the radio resource allocation request.
- the uplink signal baseband processing unit 25 stores in advance resource blocks used for transmission of reception responses at the time of simultaneous transmission shown in the allocation state 312 in FIG. Then, the uplink signal baseband processing unit 25 acquires Ack / Nack information for each CBG 110 from a predetermined resource block.
- the uplink signal baseband processing unit 25 determines whether or not a radio resource allocation request is arranged in the resource 210. When the radio resource allocation request is arranged in the radio resource 210, the uplink signal baseband processing unit 25 grasps the occurrence of the radio resource allocation request. On the other hand, when the radio resource allocation request is not arranged in the radio resource 210, the uplink signal baseband processing unit 25 determines that neither the reception response nor the radio resource allocation request has been received.
- the uplink signal baseband processing unit 25 outputs the Ack / Nack information for each CBG 110 to the scheduler 23. If it is determined that a radio resource allocation request has occurred, the uplink signal baseband processing unit 25 notifies the scheduler 23 of the occurrence of the radio resource allocation request.
- the upstream signal baseband processing unit 25 is an example of an “acquisition unit”.
- FIG. 9 is a flowchart of transmission of a reception response and a radio resource allocation request by the terminal device according to the first embodiment.
- a case where a radio signal is received from the base station apparatus 2 will be described as an example.
- the PDSCH reception processing unit 13 receives a signal transmitted from the base station apparatus 2 via the radio unit 11 and the PDCCH reception processing unit 12 (step S101).
- the ACK / NACK generation unit 14 acquires success / failure of signal reception for each CBG 110 in the signal reception by the PDCCH reception processing unit 12. Then, the ACK / NACK generation unit 14 generates a reception response including Ack / Nack for each CBG 110 according to the success or failure of signal reception for each CBG 110 acquired (step S102). Then, the ACK / NACK generation unit 14 outputs the generated reception response to the PUCCH generation unit 16.
- the PUCCH generation unit 16 receives an input of a reception response including Ack / Nack for each CBG 110 from the ACK / NACK generation unit 14. Further, the PUCCH generation unit 16 determines whether there is a radio resource allocation request based on whether the radio resource allocation request is acquired from the SR generation unit 15 (step S103).
- step S103 If there is a radio resource allocation request (step S103: Yes), the PUCCH generation unit 16 performs encoding processing and modulation processing on the acquired reception response. Then, the PUCCH generation unit 16 allocates the radio resource of the radio resource allocation request in the normal allocation state and a part of the radio resource of the reception response to the reception response subjected to the encoding process and the modulation process (Step S104).
- Step S105 the received reception response is subjected to modulation processing and encoding processing, and all normal radio resources are allocated to the reception response.
- the PUCCH generation unit 16 arranges a signal that has been subjected to modulation processing and encoding processing on the PUCCH according to radio resource allocation (step S106). Then, the PUCCH generation unit 16 outputs the signal subjected to the modulation process and the encoding process to the radio unit 11.
- the radio unit 11 receives from the PUCCH generation unit 16 an input of a signal that has been subjected to modulation processing and encoding processing. Then, the radio unit 11 performs DA conversion on the signal subjected to the modulation process and the encoding process, and transmits the signal to the terminal apparatus 1 via the antenna (step S107).
- the case of simultaneous transmission of a radio resource allocation request and a reception response has been described.
- the power is reduced by transmission in the same manner. be able to.
- transmission power can be reduced by the method described above.
- the PUCCH generation unit 16 performs radio resource allocation for CSI feedback in the same manner as radio resource allocation for the reception response described above, so that the radio resource allocation request can be transmitted without transmitting the radio resource allocation request. The occurrence can be notified to the base station. Thereby, transmission power can be reduced.
- the terminal apparatus transmits a reception response using a part of the radio resource of the radio resource allocation request in the normal allocation state and the radio resource of the reception response.
- the terminal apparatus according to the present embodiment notifies the base station apparatus of the occurrence of the Ack / Nack of each CBG and the radio resource allocation request. Therefore, the terminal device can reduce transmission power in the case of simultaneous transmission. That is, the terminal apparatus according to the present embodiment can efficiently transmit information including Ack / Nack feedback information and a radio resource allocation request.
- Example 2 The terminal device according to the present embodiment transmits a part of the Ack / Nack sent in the case of the first embodiment at the time of simultaneous transmission, and notifies the remaining Ack / Nack according to the arrangement of the transmitted Ack / Nack. Is different from the first embodiment.
- the terminal device according to the present embodiment is also represented by the block diagram of FIG. In the following description, description of functions of the same parts as those in the first embodiment will be omitted.
- the PUCCH generation unit 16 receives input of reception response information from the ACK / NACK generation unit 14. Further, the PUCCH generation unit 16 receives an input of a radio resource allocation request from the SR generation unit 15.
- the PUCCH generation unit 16 determines whether or not simultaneous transmission is performed. If not simultaneous transmission, the PUCCH generation unit 16 performs encoding processing and modulation processing on data representing a reception response or a radio resource allocation request. Thereafter, as in the first embodiment, the PUCCH generation unit 16 allocates radio resources to the signal that has been subjected to the encoding process and the modulation process.
- FIG. 10 is a diagram illustrating radio resource allocation by the terminal device according to the second embodiment.
- the vertical direction represents frequency and the horizontal direction represents time.
- the PUCCH generation unit 16 allocates radio resources as shown in an allocation state 314.
- the PUCCH generation unit 16 stores in advance the CBG 110 to which data directly representing the corresponding Ack / Nack is transmitted.
- FIG. 11 is a diagram illustrating an example of Ack / Nack for each CBG.
- CBGs # 1 to # 6 exist, and PUCCH generation unit 16 stores CBGs # 1 to # 4 in advance as direct notification CBG 401 for transmitting data directly representing Ack / Nack.
- the PUCCH generation unit 16 transmits the indirect notification CBG 402 for performing the Ack / Nack notification according to the arrangement state of the Ack / Nack information of the CBGs # 1 to # 4, that is, the unused resource block state, to the CBGs # 5 and # 6. As previously stored.
- the PUCCH generation unit 16 has an unused resource table 410 as shown in FIG.
- FIG. 12 is a diagram illustrating an example of an unused resource table.
- the unused resource table 410 represents unused resource blocks corresponding to Ack / Nack of the indirect notification CBG.
- the PUCCH generation unit 16 acquires from the ACK / NACK generation unit 14 a reception response in which a resource block representing Ack / Nack of the direct notification CBG 401 and a resource block representing Ack / Nack information of the indirect notification CBG 402 are separated.
- the PUCCH generation unit 16 acquires information on Ack / Nack of each of CBGs # 5 to # 6 that are indirect notification CBGs 402 from the acquired reception responses.
- the PUCCH generation unit 16 acquires from the unused resource table 410 combinations of unused resource blocks corresponding to the Ack / Nack of CBGs # 5 to # 6. For example, as illustrated in FIG. 11, when returning Ack to both CBG # 5 and # 6, the PUCCH generation unit 16 acquires the resource blocks 301 and 302 as unused resource blocks.
- the PUCCH generation unit 16 adds a resource block other than the radio resource 210 and the unused resource block to be allocated to the radio resource allocation request in the normal allocation state in the reception response indicating Ack / Nack of CBGs # 1 to # 4. Assign. For example, when Ack is returned to both CBG # 5 and # 6, the PUCCH generation unit 16 uses the resource block 300 corresponding to the radio resource 210 and the resource block of the radio resource 220 as reception responses to the CBGs # 1 to # 4. 301 is assigned. That is, the PUCCH generation unit 16 allocates radio resources to the reception responses to the CBGs # 1 to # 4 as in the allocation state 314. In this case, the PUCCH generation unit 16 does not use the resource blocks 302 and 303.
- the PUCCH generating unit 16 notifies the base station apparatus 2 of the occurrence of SR by including unused resource blocks that do not transmit Ack / Nack in normal radio resources. . Moreover, the PUCCH production
- the PUCCH generation unit 16 determines whether the radio resource allocation request to be transmitted is a radio resource allocation request for transmission data stored in the first buffer 181 or the second buffer 182. Then, if the PUCCH generation unit 16 is a radio resource allocation request for transmitting the transmission data stored in the first buffer 181, the transmission power density of the radio resource allocated to the reception response as in the allocation state 312 is set. Make it high. In other words, if the radio resource allocation request is for the transmission data of the low priority processing stored in the second buffer 182, the PUCCH generation unit 16 sets the radio resource of the reception response as in the allocation state 312. The transmission power density is made the same as when sending a normal reception response.
- the PUCCH generation unit 16 transmits reception response data to the base station apparatus 2 via the radio unit 11 at the transmission power density determined using the allocated radio resource. As a result, the PUCCH generation unit 16 notifies the base station apparatus 2 of the generation of the radio resource allocation request together with the Ack / Nack information of each CBG 110.
- the PUCCH generation unit 16 may allocate radio resources in the normal allocation state if the transmission power is not insufficient in the allocation in the normal allocation state. Good.
- the ACK / NACK generation unit 14 knows in advance which of the CBGs 110 is the direct notification CBG 401 and the indirect notification CBG 402. Then, the ACK / NACK generation unit 14 generates a reception response indicating Ack / Nack of the direct notification CBG 401. In addition, the ACK / NACK generation unit 14 generates a reception response indicating the Ack / Nack information of the indirect notification CBG 402. Then, the ACK / NACK generation unit 14 outputs the generated reception response to the PUCCH generation unit 16.
- the base station apparatus 2 is also represented by the block diagram of FIG. In the following description, description of functions of the same parts as those in the first embodiment will be omitted.
- the uplink signal baseband processing unit 25 has an unused resource table 410 as with the PUCCH generation unit 16 of the terminal device 1. Furthermore, the uplink signal baseband processing unit 25 has information on the direct notification CBG 401 and the indirect notification CBG 402 in the CBG 110 in advance.
- the uplink signal baseband processing unit 25 receives the signal transmitted from the terminal device 1 from the radio unit 26. Then, the uplink signal baseband processing unit 25 performs decoding processing and demodulation processing on the received signal. Then, the uplink signal baseband processing unit 25 determines whether or not Ack / Nack information is included in all resource blocks of the radio resource 220 in the received signal. When all the resource blocks of the radio resource 220 in the received signal include Ack / Nack information, that is, when no unused resource block is included, the uplink signal baseband processing unit 25 determines that the transmission is not simultaneous transmission. To do.
- the uplink signal baseband processing unit 25 acquires Ack / Nack information for each CBG 110 from the radio resource 220 which is a normal radio resource of the reception response.
- the uplink signal baseband processing unit 25 grasps the generation of the radio resource allocation request. Next, the uplink signal baseband processing unit 25 identifies the resource block in which the direct notification CBG 401 is arranged in the radio resource 220 that is the normal radio resource of the reception response. Then, the uplink signal baseband processing unit 25 acquires Ack / Nack information for the direct notification CBG 401. Further, the uplink signal baseband processing unit 25 uses the unused resource table 410 to determine Ack / Nack of the indirect notification CBG 402 from the arrangement of unused resource blocks in the radio resource 220.
- the uplink signal baseband processing unit 25 determines whether or not a radio resource allocation request is arranged in the radio resource 210. To do. When the radio resource allocation request is arranged in the radio resource 210, the uplink signal baseband processing unit 25 grasps the occurrence of the radio resource allocation request. On the other hand, when the radio resource allocation request is not arranged in the radio resource 210, the uplink signal baseband processing unit 25 determines that neither the reception response nor the radio resource allocation request has been received.
- the uplink signal baseband processing unit 25 outputs the Ack / Nack information for each CBG 110 to the scheduler 23. If it is determined that a radio resource allocation request has occurred, the uplink signal baseband processing unit 25 notifies the scheduler 23 of the occurrence of the radio resource allocation request.
- FIG. 13 is a flowchart of transmission of a reception response and a radio resource allocation request by the terminal device according to the second embodiment.
- a case where a radio signal is received from the base station apparatus 2 will be described as an example.
- the PDSCH reception processing unit 13 receives a signal transmitted from the base station apparatus 2 via the wireless unit 11 and the PDCCH reception processing unit 12 (step S201).
- the ACK / NACK generation unit 14 acquires success / failure of signal reception for each CBG 110 in the signal reception by the PDCCH reception processing unit 12. Then, the ACK / NACK generation unit 14 generates a reception response including Ack / Nack for each CBG 110 according to the success or failure of signal reception for each CBG 110 acquired (step S202). For example, the PDCCH reception processing unit 12 generates a reception response in which a resource block representing Ack / Nack of the direct notification CBG 401 and a resource block representing Ack / Nack information of the indirect notification CBG 402 are separated. Then, the ACK / NACK generation unit 14 outputs the generated reception response to the PUCCH generation unit 16.
- the PUCCH generation unit 16 receives an input of a reception response including Ack / Nack for each CBG 110 from the ACK / NACK generation unit 14. Further, the PUCCH generation unit 16 determines whether there is a radio resource allocation request based on whether the radio resource allocation request is acquired from the SR generation unit 15 (step S203).
- the PUCCH generation unit 16 acquires information on unused resource blocks representing Ack / Nack of the indirect notification CBG 402 using the unused resource table 410 (step S204). ).
- the PUCCH generation unit 16 performs modulation processing and encoding processing on Ack / Nack of the direct notification CBG 401, and allocates radio resources obtained by removing unused resource blocks from normal radio resources of the radio resource allocation request and reception response (step S205). .
- the PUCCH generation unit 16 performs modulation processing and encoding processing on the acquired reception response and allocates all normal radio resources to the reception response (Step S203). S206).
- the PUCCH generation unit 16 arranges a signal that has been subjected to modulation processing and encoding processing on the PDCCH according to radio resource allocation (step S207). Then, the PUCCH generation unit 16 outputs the signal subjected to the modulation process and the encoding process to the radio unit 11.
- the radio unit 11 receives from the PUCCH generation unit 16 an input of a signal that has been subjected to modulation processing and encoding processing. Then, the radio unit 11 performs DA conversion on the signal subjected to the modulation process and the encoding process, and transmits the signal to the terminal apparatus 1 via the antenna (step S208).
- the terminal apparatus transmits a signal directly representing Ack / Nack for the direct notification CBG to the base station apparatus, and also transmits Ack / Nack for the indirect notification CBG to Ack / Nack for the direct notification CBG. Notification is made by the arrangement of Nack. As a result, it is possible to efficiently transmit information including Ack / Nack feedback information and a radio resource allocation request. Further, the transmission power can be further reduced as compared with the first embodiment.
- Example 3 will be described.
- the terminal device according to the present embodiment is different from the first embodiment in that CBGs are grouped at the time of simultaneous transmission to generate a CBG group and Ack / Nack is notified for each CBG group. Further, in this embodiment, the number of bits of Ack / Nack feedback is reduced by increasing the corresponding number of CBs per bit of Ack / Nack to be fed back at the time of simultaneous transmission, compared with the case where simultaneous transmission is not performed.
- the terminal device according to the present embodiment is also represented by the block diagram of FIG. In the following description, description of functions of the same parts as those in the first embodiment will be omitted.
- the PUCCH generation unit 16 receives input of reception response information from the ACK / NACK generation unit 14. Further, the PUCCH generation unit 16 receives an input of a radio resource allocation request from the SR generation unit 15.
- the PUCCH generation unit 16 determines whether or not simultaneous transmission is performed. If not simultaneous transmission, the PUCCH generation unit 16 performs encoding processing and modulation processing on data representing a reception response or a radio resource allocation request. Thereafter, as in the first embodiment, the PUCCH generation unit 16 allocates radio resources to the signal that has been subjected to the encoding process and the modulation process.
- FIG. 14 is a diagram illustrating an example of the CBG group generated by the PUCCH generation unit according to the third embodiment.
- the PUCCH generation unit 16 acquires Ack / Nack information for each CBG # 1 to # 6 from the reception response acquired from the ACK / NACK generation unit 14.
- the PUCCH generation unit 16 has information on how to group CBGs # 1 to # 6 in advance. Then, PUCCH generation unit 16 groups CBGs # 1 to # 6 according to predetermined information. For example, as shown in FIG. 14, the PUCCH generation unit 16 generates CBG groups ## 1 and ## 2 one by one as they are, and CBGs # 1 and # 2, and CBGs # 3 and # 4, and CBGs. CBG groups ## 3 and ## 4 are generated by grouping # 5 and # 6, respectively.
- the PUCCH generation unit 16 sets the Ack / Nack of each CBG group ## 1 to ## 4 as the logical sum of the Ack / Nack of the CBG 110 included in each group. That is, the PUCCH generation unit 16 directly sets the Ack / Nack for CBG # 1 and # 2 as the Ack / Nack of CBG groups ## 1 and ## 2. Further, since the response to both CBG # 3 and # 4 is Ack, the PUCCH generation unit 16 sets the response to CBG group ## 3 as Ack. Also, since the response to CBG # 5 is Ack and the response to any of CBG # 6 is Nack, PUCCH generation unit 16 sets the response to CBG group ## 4 to Nack.
- FIG. 15 is a diagram illustrating radio resource allocation by the terminal device according to the third embodiment.
- the PUCCH generation unit 16 assigns the resource blocks 302 and 301 of the radio resource 220 to reception responses indicating Ack / Nack of the CBG groups ## 1 to ## 4, and sets the resource block 303 as an unused resource block.
- the PUCCH generation unit 16 notifies the base station apparatus 2 of the occurrence of SR by including unused resource blocks that do not transmit Ack / Nack in normal radio resources. Moreover, the PUCCH production
- the PUCCH generation unit 16 changes the transmission power density depending on whether the radio resource allocation request to be transmitted is a radio resource allocation request for transmission data stored in either the first buffer 181 or the second buffer 182.
- the PUCCH generation unit 16 transmits reception response data to the base station apparatus 2 via the radio unit 11 at the transmission power density determined using the allocated radio resource. As a result, the PUCCH generation unit 16 notifies the base station apparatus 2 of the generation of the radio resource allocation request together with the Ack / Nack information of each CBG 110.
- the PUCCH generation unit 16 may allocate radio resources in the normal allocation state if the transmission power is not insufficient in the allocation in the normal allocation state. Good.
- the base station apparatus 2 is also represented by the block diagram of FIG. In the following description, description of functions of the same parts as those in the first embodiment will be omitted.
- the uplink signal baseband processing unit 25 has information on the CBGs 110 included in the CBG groups ## 1 to ## 4 in advance. Further, the uplink signal baseband processing unit 25 has a position at which Ack / Nack for the CBG groups ## 1 to ## 4 is arranged in advance.
- the uplink signal baseband processing unit 25 receives the signal transmitted from the terminal device 1 from the radio unit 26. Then, the uplink signal baseband processing unit 25 performs decoding processing and demodulation processing on the received signal. Then, the uplink signal baseband processing unit 25 determines whether or not Ack / Nack information is included in all resource blocks of the radio resource 220 in the received signal. When all the resource blocks of the radio resource 220 in the received signal include Ack / Nack information, that is, when no unused resource block is included, the uplink signal baseband processing unit 25 determines that the transmission is not simultaneous transmission. To do.
- the uplink signal baseband processing unit 25 acquires Ack / Nack information for each of the CBGs # 1 to # 6 from the radio resource 220 that is the normal radio resource of the reception response.
- the uplink signal baseband processing unit 25 grasps the generation of the radio resource allocation request. Next, the uplink signal baseband processing unit 25 acquires Ack / Nack information for the CBG groups ## 1 to ## 4 from a predetermined resource block in the radio resource 220 that is the normal radio resource of the reception response. Then, the uplink signal baseband processing unit 25 acquires Ack / Nack for each CBG # 1 to # 6 from the information of Ack / Nack for CBG groups ## 1 to ## 4.
- the uplink signal baseband processing unit 25 determines whether or not a radio resource allocation request is arranged in the radio resource 210. .
- the uplink signal baseband processing unit 25 grasps the occurrence of the radio resource allocation request.
- the uplink signal baseband processing unit 25 determines that neither the reception response nor the radio resource allocation request has been received.
- the uplink signal baseband processing unit 25 outputs the Ack / Nack information for each CBG 110 to the scheduler 23. If it is determined that a radio resource allocation request has occurred, the uplink signal baseband processing unit 25 notifies the scheduler 23 of the occurrence of the radio resource allocation request.
- FIG. 16 is a flowchart of transmission of a reception response and a radio resource allocation request by the terminal device according to the third embodiment.
- a case where a radio signal is received from the base station apparatus 2 will be described as an example.
- the PDSCH reception processing unit 13 receives a signal transmitted from the base station device 2 via the radio unit 11 and the PDCCH reception processing unit 12 (step S301).
- the ACK / NACK generation unit 14 acquires success / failure of signal reception for each CBG 110 in the signal reception by the PDCCH reception processing unit 12. Then, the ACK / NACK generation unit 14 generates a reception response including Ack / Nack for each CBG 110 according to the success or failure of signal reception for each CBG 110 acquired (step S302). Then, the ACK / NACK generation unit 14 outputs the generated reception response to the PUCCH generation unit 16.
- the PUCCH generation unit 16 receives an input of a reception response including Ack / Nack for each CBG 110 from the ACK / NACK generation unit 14. Further, the PUCCH generation unit 16 determines whether there is a radio resource allocation request based on whether the radio resource allocation request is acquired from the SR generation unit 15 (step S303).
- step S303 If there is a radio resource allocation request (step S303: Yes), the PUCCH generation unit 16 generates a CBG group (step S304).
- the PUCCH generation unit 16 calculates the logical sum of Ack / Nack of the CBG 110 included in each CBG group and generates Ack / Nack of the CBG group (step S305).
- the PUCCH generation unit 16 performs modulation processing and encoding processing on the Ack / Nack of each CBG group, and allocates a part of the normal radio resources of the reception response (step S306).
- the PUCCH generation unit 16 performs modulation processing and encoding processing on the acquired reception response, and thus generates a reception response including Ack / Nack of CBG. All normal radio resources are allocated (step S307).
- the PUCCH generation unit 16 arranges a signal that has been subjected to modulation processing and encoding processing on the PUCCH in accordance with radio resource allocation (step S308). Then, the PUCCH generation unit 16 outputs the signal subjected to the modulation process and the encoding process to the radio unit 11.
- the radio unit 11 receives from the PUCCH generation unit 16 an input of a signal that has been subjected to modulation processing and encoding processing.
- the radio unit 11 performs DA conversion on the signal subjected to the modulation process and the encoding process, and transmits the signal to the terminal device 1 via the antenna (step S309).
- the terminal apparatus notifies the base station apparatus of Ack / Nack for the CBG group in which the CBGs are collected. As a result, it is possible to efficiently transmit information including Ack / Nack feedback information and a radio resource allocation request. Further, the transmission power can be further reduced as compared with the first embodiment.
- Example 4 will be described.
- the terminal device according to the present embodiment has a function that combines the functions of the second embodiment and the third embodiment.
- the terminal device according to the present embodiment is also represented by the block diagram of FIG. In the following description, description of functions of the same parts as those in the first embodiment will be omitted.
- FIG. 17 is a diagram illustrating an example of a CBG group generated by the PUCCH generation unit according to the fourth embodiment, and a direct notification CBG and an indirect notification CBG.
- the PUCCH generation unit 16 acquires Ack / Nack information for each of the CBGs # 1 to # 8 from the reception response acquired from the ACK / NACK generation unit 14.
- the PUCCH generation unit 16 has information on how to group CBGs # 1 to # 8 in advance. Then, the PUCCH generating unit 16 groups CBGs # 1 to # 8 according to predetermined information. For example, in FIG. 17, the PUCCH generation unit 16 collects CBG # 1 and # 2, CBG # 3 and # 4, CBG # 5 and # 6, and CBG # 7 and # 8, respectively. ## 4 is generated. In this case, the PUCCH generation unit 16 sets the Ack / Nack of each CBG group ## 1 to ## 4 as the logical sum of the Ack / Nack of the CBG 110 included in each group.
- the PUCCH generation unit 16 sets the CBG groups ## 1 and ## 2 as the direct notification CBG group 403. Further, the PUCCH generation unit 16 sets the CBG groups ## 3 and ## 4 as the indirect notification CBG group 404.
- the PUCCH generation unit 16 has a used resource table 411 shown in FIG.
- FIG. 18 is a diagram illustrating an example of a used resource table.
- the PUCCH generation unit 16 uses a table in which used resource blocks are registered, but a table in which unused resource blocks are registered may be used as in the second embodiment.
- the PUCCH generation unit 16 uses the used resource table 411 to identify used resource blocks representing information of Ack / Nack of CBG groups ## 3 and ## 4 that are indirect notification CBG groups 404. For example, when the Ack / Nack for the CBG groups ## 1 to ## 4 shown in FIG. 17 is in the state shown in FIG. 17, the resource block 303 becomes the used resource block.
- FIG. 19 is a diagram illustrating radio resource allocation by the terminal device according to the fourth embodiment.
- the PUCCH generation unit 16 assigns the resource block 302 specified as the used resource block to the reception response indicating the Ack / Nack of the CBG groups ## 1 and ## 2, and unused the resource blocks 301, 303, and 304. Resource block.
- the PUCCH generating unit 16 notifies the base station apparatus 2 of the occurrence of SR by including unused resource blocks that do not transmit Ack / Nack in normal radio resources. . Moreover, the PUCCH production
- the PUCCH generation unit 16 changes the transmission power density depending on whether the radio resource allocation request to be transmitted is a radio resource allocation request for transmission data stored in either the first buffer 181 or the second buffer 182.
- the PUCCH generation unit 16 transmits reception response data to the base station apparatus 2 via the radio unit 11 at the transmission power density determined using the allocated radio resource. As a result, the PUCCH generation unit 16 notifies the base station apparatus 2 of the generation of the radio resource allocation request together with the Ack / Nack information of each CBG 110.
- the PUCCH generation unit 16 may allocate radio resources in the normal allocation state if the transmission power is not insufficient in the allocation in the normal allocation state. Good.
- the base station apparatus 2 is also represented by the block diagram of FIG. In the following description, description of functions of the same parts as those in the first embodiment will be omitted.
- the uplink signal baseband processing unit 25 has information on the CBGs 110 included in the CBG groups ## 1 to ## 4 in advance. Further, the uplink signal baseband processing unit 25 has in advance a position where Ack / Nack for the direct notification CBG group 403 is arranged.
- the uplink signal baseband processing unit 25 receives the signal transmitted from the terminal device 1 from the radio unit 26. Then, the uplink signal baseband processing unit 25 performs decoding processing and demodulation processing on the received signal. When the uplink signal baseband processing unit 25 includes an unused resource block in the radio resource 220 in the received signal, the uplink signal baseband processing unit 25 grasps the generation of the radio resource allocation request. Next, the uplink signal baseband processing unit 25 acquires Ack / Nack information for the direct notification CBG group 403 from a predetermined resource block in the radio resource 220 that is the normal radio resource of the reception response.
- the uplink signal baseband processing unit 25 obtains the Ack / Nack of the indirect notification CBG group 404 from the position where the Ack / Nack for the direct notification CBG group 403 is arranged. Thereafter, the uplink signal baseband processing unit 25 acquires Ack / Nack for each of the CBGs # 1 to # 6 from the information of Ack / Nack for the CBG groups ## 1 to ## 4.
- the terminal device divides a CBG group in which CBGs are grouped into a direct notification CBG group and an indirect notification CBG group. Then, the terminal apparatus according to the present embodiment also notifies the Ack / Nack for the indirect notification CBG group by notifying the base station apparatus of Ack / Nack for the direct notification CBG group. As a result, it is possible to efficiently transmit information including Ack / Nack feedback information and a radio resource allocation request. Further, the transmission power can be further reduced as compared with the first embodiment.
- Example 5 The terminal device according to the present embodiment divides the CBG into the direct notification CBG and the indirect notification CBG without changing the radio resource allocation request at the time of simultaneous transmission, and the Ack / Nack of the indirect notification CBG at the position of the Ack / Nack with respect to the direct notification CBG. To be notified.
- the terminal device according to the present embodiment is also represented by the block diagram of FIG. In the following description, description of functions of the same parts as those in the first embodiment will be omitted.
- FIG. 20 is a diagram illustrating radio resource allocation by the terminal device according to the fifth embodiment.
- the allocation states 321 to 323 in FIG. 20 represent frequency in the vertical direction and time in the horizontal direction.
- the PUCCH generation unit 16 when sending a reception response when not simultaneously transmitting, allocates all the normal radio resources to the reception response as shown in the allocation state 321.
- the PUCCH generation unit 16 allocates the radio resource 210, which is the normal radio resource of the radio resource allocation request in the allocation state 322, to the radio resource allocation request. Further, the PUCCH generation unit 16 divides the CBG 110 into a direct notification CBG 401 and an indirect notification CBG 402. Then, the PUCCH generation unit 16 allocates a part of the radio resource 220 in the allocation state 322 to the Ack / Nack of the direct notification CBG 401 so as to represent the Ack / Nack of the indirect notification CBG 402.
- the PUCCH generation unit 16 directly assigns the resource blocks 301, 302, and 304 to Ack / Nack of the notification CBG 401.
- the PUCCH generation unit 16 notifies the Ack / Nack of the indirect notification CBG 402 by setting the resource block 303 as an unused resource block.
- the PUCCH generation unit 16 reduces the signal to be transmitted by including unused resource blocks that do not transmit Ack / Nack in the normal radio resource, thereby reducing the transmission power.
- the PUCCH generation unit 16 determines the transmission power density of the radio resource 210 depending on whether the radio resource allocation request to be transmitted is a radio resource allocation request for transmission data stored in the first buffer 181 or the second buffer 182. To change. Thereafter, the PUCCH generation unit 16 transmits data of a radio resource allocation request and a reception response to the base station apparatus 2 via the radio unit 11 at a transmission power density determined using the allocated radio resource.
- the PUCCH generation unit 16 is in the normal allocation state as shown in the allocation state 323. Wireless resource allocation may be performed.
- the base station apparatus 2 is also represented by the block diagram of FIG. In the following description, description of functions of the same parts as those in the first embodiment will be omitted.
- the uplink signal baseband processing unit 25 receives the signal transmitted from the terminal device 1 from the radio unit 26. Then, the uplink signal baseband processing unit 25 performs decoding processing and demodulation processing on the received signal. Then, the uplink signal baseband processing unit 25 determines whether or not simultaneous transmission is performed from the received signal. If not simultaneous transmission, the uplink signal baseband processing unit 25 acquires a radio resource allocation request or an Ack / Nack of each CBG 110.
- the uplink signal baseband processing unit 25 acquires a radio resource allocation request. Next, the uplink signal baseband processing unit 25 acquires Ack / Nack information for the notification CBG 401 directly from the radio resource 220 in the received signal. Further, the uplink signal baseband processing unit 25 obtains Ack / Nack of the indirect notification CBG 402 from the arrangement state of the direct notification CBG 401.
- the uplink signal baseband processing unit 25 outputs the Ack / Nack information for each CBG 110 to the scheduler 23. If it is determined that a radio resource allocation request has occurred, the uplink signal baseband processing unit 25 notifies the scheduler 23 of the occurrence of the radio resource allocation request.
- the terminal apparatus transmits a radio resource allocation request using a normal radio resource, and transmits a reception response using a direct notification CBG and an indirect notification CBG.
- a radio resource allocation request using a normal radio resource
- a reception response using a direct notification CBG and an indirect notification CBG.
- the transmission power reduction at the time of simultaneous transmission of the radio resource allocation request and the reception response has been described.
- the above method is used. can do. For example, when there is a reception response with a high priority for URLLC and a reception response with a low priority for EMBB as reception responses, the transmission power can be reduced using the above-described method.
- the PUCCH generation unit 16 allocates normal radio resources to the reception response for URLLC, similarly to the radio resource allocation request described above. Moreover, the PUCCH generation part 16 transmits the reception response for EMBB using the direct notification CBG401 and the indirect notification CBG402 similarly to the reception response mentioned above. Thereby, the PUCCH generation part 16 can reduce the number of bits used for the reception response for EMBB, and can reduce transmission power. Also, the PUCCH generation unit 16 can distribute the reduced power to the reception response for URLLC, and can improve the reliability of the reception response for URLLC.
- the same method can be used for simultaneous transmission of a radio resource allocation request, a URLLC reception response, and an EMBB reception response.
- the PUCCH generation unit 16 allocates normal radio resources to the radio resource allocation request and the reception response for the URLLC, similarly to the radio resource allocation request described above.
- the PUCCH generation part 16 transmits the reception response for EMBB using the direct notification CBG401 and the indirect notification CBG402 similarly to the reception response mentioned above.
- the PUCCH generation part 16 can reduce the number of bits used for the reception response for EMBB, and can reduce transmission power.
- the PUCCH generation unit 16 can distribute the reduced power to a radio resource allocation request or a reception response for URLLC, and can improve the reliability of each.
- Example 6 will be described.
- the terminal apparatus according to the present embodiment transmits the radio resource allocation request as it is during the simultaneous transmission. Then, the terminal device according to the present embodiment groups CBGs and notifies Ack / Nack for each CBG group.
- the terminal device according to the present embodiment is also represented by the block diagram of FIG. In the following description, description of functions of the same parts as those in the first embodiment will be omitted.
- FIG. 21 is a diagram illustrating an example of the CBG group generated by the PUCCH generation unit according to the sixth embodiment. Here, a case where CBGs # 1 to # 6 exist will be described.
- the PUCCH generation unit 16 acquires Ack / Nack information for each CBG # 1 to # 6 from the reception response acquired from the ACK / NACK generation unit 14.
- the PUCCH generation unit 16 has information on how to group CBGs # 1 to # 6 in advance. Then, PUCCH generation unit 16 groups CBGs # 1 to # 6 according to predetermined information. For example, as shown in FIG. 21, the PUCCH generation unit 16 generates CBG groups ## 1 and ## 2 by grouping CBGs # 1 to # 3 and CBGs # 4 to # 6, respectively.
- the PUCCH generation unit 16 sets the Ack / Nack of each CBG group ## 1 to ## 2 as the logical sum of the Ack / Nack of the CBG 110 included in each group.
- the PUCCH generation unit 16 allocates the radio resource 210, which is the normal radio resource of the radio resource allocation request, to the radio resource allocation request. Further, the PUCCH generation unit 16 allocates some predetermined resource blocks in the normal radio resources of the reception response to the reception responses representing the Ack / Nack of the CBG groups ## 1 and ## 2.
- FIG. 22 is a diagram illustrating radio resource allocation by the terminal device according to the sixth embodiment. Here, the PUCCH generation unit 16 assigns the resource block 303 of the radio resource 220 to the reception response indicating Ack / Nack of the CBG groups ## 1 and ## 2, and sets the resource blocks 301 and 302 as unused resource blocks.
- the PUCCH generation unit 16 reduces the signal to be transmitted by including unused resource blocks that do not transmit Ack / Nack in the normal radio resource, thereby reducing the transmission power.
- the PUCCH generation unit 16 changes the transmission power density depending on whether the radio resource allocation request to be transmitted is a radio resource allocation request for transmission data stored in either the first buffer 181 or the second buffer 182.
- the PUCCH generation unit 16 transmits reception response data to the base station apparatus 2 via the radio unit 11 at the transmission power density determined using the allocated radio resource. Thereby, the PUCCH generation unit 16 transmits the generation of the radio resource allocation request to the base station apparatus 2 together with the Ack / Nack information of each CBG 110.
- the PUCCH generation unit 16 may allocate radio resources in the normal allocation state if the transmission power is not insufficient in the allocation in the normal allocation state. Good.
- the PUCCH generation unit 16 determines the transmission power density of the radio resource 210 depending on whether the radio resource allocation request to be transmitted is a radio resource allocation request for transmission data stored in the first buffer 181 or the second buffer 182. To change. Thereafter, the PUCCH generation unit 16 transmits data of a radio resource allocation request and a reception response to the base station apparatus 2 via the radio unit 11 at a transmission power density determined using the allocated radio resource.
- the PUCCH generation unit 16 may allocate radio resources in the normal allocation state if the transmission power is not insufficient in the allocation in the normal allocation state. Good.
- the terminal apparatus transmits a radio resource allocation request using a normal radio resource and transmits a reception response using a CBG group.
- a radio resource allocation request using a normal radio resource and transmits a reception response using a CBG group.
- transmission power can be reduced.
- the transmission power reduction during the simultaneous transmission of the radio resource allocation request and the reception response has been described.
- the transmission power can be reduced using the method described above.
- the transmission power can be reduced using the above-described method.
- the PUCCH generation unit 16 allocates normal radio resources to the reception response for URLLC, similarly to the radio resource allocation request described above. Moreover, the PUCCH production
- the same method can be used for simultaneous transmission of a radio resource allocation request, a URLLC reception response, and an EMBB reception response.
- Example 7 will be described.
- the terminal apparatus according to the present embodiment transmits the radio resource allocation request as it is during the simultaneous transmission.
- the terminal device according to the present embodiment sets a resource block including more Nack information as a non-transmitted resource block among resource blocks that transmit a reception response.
- the terminal device according to the present embodiment is also represented by the block diagram of FIG. In the following description, description of functions of the same parts as those in the first embodiment will be omitted.
- FIG. 23 is a diagram for explaining the calculation of the number of Nacks in each resource block.
- CBGs # 1 to # 6 exist will be described.
- the PUCCH generation unit 16 acquires Ack / Nack information for each of the CBGs # 1 to # 6 indicated in the Ack / Nack information 421 in FIG. 23, for example. Next, the PUCCH generation unit 16 identifies resource blocks 301 to 303 that are allocated to the Ack / Nack information for the CBGs # 1 to # 6 in the normal allocation state. Here, as shown in Table 422, resource blocks 301 are allocated to CBG # 1 and # 2. Further, resource blocks 302 are allocated to CBGs # 3 and # 4. Further, resource blocks 303 are allocated to CBGs # 5 and # 6.
- the PUCCH generation unit 16 acquires the number of Nacks of CBGs # 1 to # 6 corresponding to the resource blocks 301 to 303, respectively.
- the number of Nacks in the resource block 301 is 2
- the number of Nacks in the resource block 302 is 0,
- the number of Nacks in the resource block 303 is 1.
- FIG. 24 is a diagram illustrating radio resource allocation by the terminal device according to the seventh embodiment.
- the PUCCH generation unit 16 allocates a radio resource 210, which is a normal radio resource of the radio resource allocation request, to the radio resource allocation request. Further, the PUCCH generation unit 16 performs allocation similar to that in the normal allocation state using the resource blocks 302 and 303 other than the resource block 301 as unused resource blocks.
- the PUCCH generation unit 16 reduces the signal to be transmitted by including unused resource blocks that do not transmit Ack / Nack in the normal radio resource, thereby reducing the transmission power.
- the PUCCH generation unit 16 changes the transmission power density depending on whether the radio resource allocation request to be transmitted is a radio resource allocation request for transmission data stored in either the first buffer 181 or the second buffer 182.
- the PUCCH generation unit 16 transmits reception response data to the base station apparatus 2 via the radio unit 11 at the transmission power density determined using the allocated radio resource. As a result, the PUCCH generation unit 16 transmits a radio resource allocation request to the base station apparatus 2 together with the Ack / Nack information of the CBGs # 3 to # 4 other than the Ack / Nack information of the CBGs # 1 and # 2.
- the base station apparatus 2 When Nack is returned, the base station apparatus 2 retransmits the data for which Nack is returned. In addition, even when no response is returned, the base station apparatus 2 retransmits data for which no response is returned. That is, even if the terminal apparatus 1 does not return Nack, the base station apparatus 2 retransmits data. Therefore, even if the Ack / Nack is not returned in a resource block containing many Nacks, the Ack / Nack is returned. It can be said that almost the same processing is performed. For this reason, in this embodiment, the PUCCH generation unit 16 sets a resource block containing a large amount of Nack as an unused resource block.
- the PUCCH generation unit 16 may allocate radio resources in the normal allocation state if the transmission power is not insufficient in the allocation in the normal allocation state. Good.
- the PUCCH generation unit 16 determines the transmission power density of the radio resource 210 depending on whether the radio resource allocation request to be transmitted is a radio resource allocation request for transmission data stored in the first buffer 181 or the second buffer 182. To change. Thereafter, the PUCCH generation unit 16 transmits data of a radio resource allocation request and a reception response to the base station apparatus 2 via the radio unit 11 at a transmission power density determined using the allocated radio resource.
- the PUCCH generation unit 16 may allocate radio resources in the normal allocation state if the transmission power is not insufficient in the allocation in the normal allocation state. Good.
- FIG. 25 is a flowchart of transmission of a reception response and a radio resource allocation request by the terminal device according to the seventh embodiment.
- a case where a radio signal is received from the base station apparatus 2 will be described as an example.
- the PDSCH reception processing unit 13 receives a signal transmitted from the base station apparatus 2 via the wireless unit 11 and the PDCCH reception processing unit 12 (step S401).
- the ACK / NACK generation unit 14 acquires success / failure of signal reception for each CBG 110 in the signal reception by the PDCCH reception processing unit 12. Then, the ACK / NACK generation unit 14 generates a reception response including Ack / Nack for each CBG 110 according to the success or failure of signal reception for each CBG 110 acquired (step S402). Then, the ACK / NACK generation unit 14 outputs the generated reception response to the PUCCH generation unit 16.
- the PUCCH generation unit 16 receives an input of a reception response including Ack / Nack for each CBG 110 from the ACK / NACK generation unit 14. Further, the PUCCH generation unit 16 determines whether there is a radio resource allocation request based on whether the radio resource allocation request is acquired from the SR generation unit 15 (step S403).
- the PUCCH generation unit 16 specifies the number of Nacks included in each resource block 301 to 303 of the radio resource 220 in the normal allocation state (step S404).
- the PUCCH generation unit 16 determines an untransmitted resource block in descending order of the number of Nack (step S405).
- the PUCCH generation unit 16 allocates resource blocks 302 and 303 other than unused resource blocks to the reception response excluding Ack / Nack that is not transmitted and is allocated to an untransmitted block in the normal allocation state (step S406).
- the PUCCH generation unit 16 performs modulation processing and encoding processing on the acquired reception response, and allocates all normal radio resources to the generated reception response. (Step S407).
- the PUCCH generation unit 16 arranges the signal subjected to the modulation process and the encoding process on the PUCCH according to the radio resource assignment (step S408). Then, the PUCCH generation unit 16 outputs the signal subjected to the modulation process and the encoding process to the radio unit 11.
- the radio unit 11 receives from the PUCCH generation unit 16 an input of a signal that has been subjected to modulation processing and encoding processing.
- the radio unit 11 performs DA conversion on the signal subjected to the modulation process and the encoding process, and transmits the signal to the terminal device 1 via the antenna (step S409).
- the terminal apparatus transmits a radio resource allocation request using normal radio resources, and transmits a reception response using a resource block including many Nacks among the reception responses as unused resource blocks. To do. As a result, it is possible to efficiently transmit information including Ack / Nack feedback information and a radio resource allocation request. In addition, transmission power can be reduced.
- the transmission power reduction during the simultaneous transmission of the radio resource allocation request and the reception response has been described.
- the transmission power can be reduced using the method described above.
- the transmission power can be reduced using the above-described method.
- the PUCCH generation unit 16 allocates normal radio resources to the reception response for URLLC, similarly to the radio resource allocation request described above. Moreover, the PUCCH generation part 16 makes a resource block with many Nack among the resource blocks allocated to the reception response for EMBB as an unsent resource block similarly to the reception response mentioned above. Thereby, the PUCCH generation part 16 can reduce the number of bits used for the reception response for EMBB, and can reduce transmission power. Also, the PUCCH generation unit 16 can distribute the reduced power to the reception response for URLLC, and can improve the reliability of the reception response for URLLC.
- the same method can be used for simultaneous transmission of a radio resource allocation request, a URLLC reception response, and an EMBB reception response.
- Example 8 will be described.
- the terminal device according to the present embodiment differs from the first to seventh embodiments in that different types of radio resource allocation requests are transmitted simultaneously.
- the terminal device according to the present embodiment is also represented by the block diagram of FIG. In the following description, the description of the function of each part similar to each embodiment will be omitted.
- FIG. 26 is a diagram illustrating radio resource allocation in response to different types of radio resource allocation requests according to the eighth embodiment.
- the vertical direction in FIG. 26 represents frequency, and the horizontal direction represents time.
- Radio resources 211 and 212 are assigned to different types of radio resource allocation requests. When different types of radio resource allocation requests are transmitted at the same timing, the radio resource 211 and the radio resource 212 overlap in the time direction. In addition, when different types of radio resource allocation requests and reception responses are transmitted at the same timing, the radio resource 211, the radio resource 212, and the radio resource 220 overlap in the time direction. Therefore, transmission power increases in the case of simultaneous transmission. Therefore, the terminal device 1 according to the present embodiment reduces transmission power by the following method.
- the PUCCH generation unit 16 acquires from the SR generation unit 15 radio resource allocation requests for transmission data stored in the first buffer 181 and the second buffer 182. That is, the PUCCH generation unit 16 acquires a high priority radio resource allocation request and a low priority radio resource allocation request.
- the PUCCH generation unit 16 defers transmission of a low priority radio resource allocation request for transmission data stored in the second buffer 182 to the next transmission opportunity. Then, simultaneous transmission of a high-priority radio resource allocation request and reception response for transmission data stored in the first buffer 181 is executed using any one of the methods of the first to third embodiments.
- the PUCCH generation unit 16 uses the method of any one of the first to third embodiments to perform the radio resource allocation request. And the reception response are sent simultaneously.
- the PUCCH generation unit 16 acquires from the SR generation unit 15 radio resource allocation requests for transmission data stored in the first buffer 181 and the second buffer 182.
- the PUCCH generation unit 16 defers transmission of a low priority radio resource allocation request for transmission data stored in the second buffer 182 to the next transmission opportunity. Then, simultaneous transmission of a high-priority radio resource allocation request and reception response for transmission data stored in the first buffer 181 is executed using any one of the methods of the first to third embodiments.
- the PUCCH generation unit 16 receives and receives a radio resource allocation request using any of the methods in the fifth to seventh embodiments. Performs simultaneous transmission with response.
- the PUCCH generation unit 16 transmits the low-priority radio resource allocation request to the next transmission opportunity. put off. Then, the PUCCH generation unit 16 allocates a normal radio resource to the reception response and transmits it.
- the terminal apparatus when different types of radio resource allocation requests are generated at the same time, postpones transmission of a low-priority radio resource allocation request, and The power consumption is reduced by any of the methods described in FIG. As a result, even terminal devices that handle different types of radio resource allocation requests can efficiently transmit information including Ack / Nack feedback information and radio resource allocation requests. In addition, transmission power can be reduced.
- Example 9 will be described.
- the terminal device according to the present embodiment is different from the first embodiment in that it handles different types of radio resource allocation requests and notifies the types of radio resource allocation requests according to the pattern of radio resources used in the PUCCH.
- the terminal device according to the present embodiment is also represented by the block diagram of FIG. In the following description, the description of the function of each part similar to each embodiment will be omitted.
- the PUCCH generation unit 16 acquires a radio resource allocation request for transmission data stored in either the first buffer 181 or the second buffer 182 from the SR generation unit 15.
- FIG. 27 is a diagram illustrating radio resource allocation by the terminal device according to the ninth embodiment.
- the PUCCH generation unit 16 sets the transmission power density higher than when the reception response is transmitted when it is not simultaneous transmission.
- the PUCCH generation unit 16 sets the resource block 301 as an unused resource as shown in an allocation state 332 in FIG. Then, resource blocks 300, 302, and 303 are allocated to the reception response. In this case, the PUCCH generation unit 16 sets the transmission power density in the same way as when a reception response is transmitted when it is not simultaneous transmission.
- the uplink signal baseband processing unit 25 of the base station apparatus 2 receives the signal transmitted from the terminal apparatus 1. And the uplink signal baseband process part 25 of the base station apparatus 2 acquires a reception response in PUCCH of a received signal, and acquires Ack / Nack of each CBG110. Further, the uplink signal baseband processing unit 25 confirms the resource block used for transmission of the reception response on the PUCCH. When the resource block 302 is an unused resource block, the uplink signal baseband processing unit 25 determines that a radio resource with high priority has occurred. When the resource block 301 is an unused resource block, the uplink signal baseband processing unit 25 determines that a low priority radio resource has occurred.
- the terminal apparatus notifies the type of radio resource allocation request according to the pattern of the used resource block in the PUCCH. As a result, it is possible to efficiently transmit information including Ack / Nack feedback information and a radio resource allocation request.
- Example 10 The terminal apparatus according to the present embodiment handles different types of radio resource allocation requests, and switches between the functions of the first embodiment and the functions of the second embodiment according to the types of radio resource allocation requests.
- the terminal device according to the present embodiment is also represented by the block diagram of FIG. In the following description, the description of the function of each part similar to each embodiment will be omitted.
- the PUCCH generation unit 16 acquires a radio resource allocation request for transmission data stored in either the first buffer 181 or the second buffer 182 from the SR generation unit 15.
- the PUCCH generation unit 16 uses the function of the second embodiment in the case of a high priority radio resource allocation request. That is, the PUCCH generation unit 16 divides each CBG 110 into a direct notification CBG 401 and an indirect notification CBG 402. Then, the PUCCH generation unit 16 assigns the reception response indicating Ack / Nack for the direct notification CBG 401 and the radio resource 210 and a part of the radio resource 220 to the reception response so as to indicate Ack / Nack of the indirect notification CBG 402. In this case, the PUCCH generation unit 16 sets a higher transmission power density than when a reception response is transmitted when it is not simultaneous transmission.
- the PUCCH generation unit 16 uses the function of the first embodiment. That is, the PUCCH generation unit 16 assigns the reception response indicating the Ack / Nack of each CBG 110 to the radio resource 210 and part of the radio resource 220 as the reception response. In this case, the PUCCH generation unit 16 sets a transmission power density equivalent to that when transmitting a reception response when not simultaneous transmission.
- the terminal apparatus changes the radio resource allocation method according to the type of radio resource allocation request. As a result, it is possible to efficiently transmit information including Ack / Nack feedback information and a radio resource allocation request.
- Example 11 The terminal apparatus according to the present embodiment switches a method for transmitting a radio resource allocation request and a reception response according to transmission power.
- FIG. 28 is a block diagram of a terminal apparatus according to the eleventh embodiment. In the following description, the description of the function of each part similar to each embodiment will be omitted.
- the terminal device 1 includes a propagation channel estimation unit 31 and a surplus power calculation unit 32.
- the propagation channel estimation unit 31 estimates received power from the amplitude of the signal transmitted from the base station device 2.
- the propagation channel estimation unit 31 then outputs the received power information to the surplus power calculation unit 32.
- the surplus power calculation unit 32 acquires information on received power from the propagation channel estimation unit 31. Then, the surplus power calculation unit 32 subtracts the reception power from the transmission power used by the base station apparatus 2 and calculates a propagation loss. Next, the surplus power calculation unit 32 calculates the transmission power used to achieve the reliability guaranteed for Ack / Nack from the surplus power. Then, the surplus power calculation unit 32 notifies the PUSCH generation unit 17 of information on transmission power used to achieve the reliability guaranteed for Ack / Nack.
- the PUSCH generation unit 17 acquires, from the surplus power calculation unit 32, information on transmission power used to achieve the reliability guaranteed for Ack / Nack. Then, the PUSCH generation unit 17 periodically transmits transmission power information used to achieve the reliability guaranteed for Ack / Nack to the base station apparatus 2.
- the PUCCH generation unit 16 determines which method of the first to seventh embodiments is used for transmitting the radio resource allocation request and the reception response according to the transmission power. Then, the PUCCH generation unit 16 transmits a radio resource allocation request and a reception response using the determined method.
- the base station apparatus 2 is also represented by the block diagram of FIG.
- the uplink signal baseband processing unit 25 receives information on transmission power used to achieve the reliability guaranteed for Ack / Nack from the terminal device 1.
- the uplink signal baseband processing unit 25 specifies the method of transmitting the radio resource allocation request and reception response used by the terminal device 1 according to the received transmission power information. Then, the uplink signal baseband processing unit 25 receives the radio resource allocation request and the reception response using the specified method.
- the terminal apparatus and the base station apparatus perform transmission / reception by switching the transmission method of the radio resource allocation request and the reception response according to the transmission power of the terminal apparatus.
- information including Ack / Nack feedback information and a radio resource allocation request can be transmitted more efficiently.
- FIG. 29 is a diagram illustrating allocation of radio resources when Ack / Nack for signals in different TTIs are collectively transmitted at the same timing.
- the terminal device 1 transmits a radio resource allocation request and a reception response using any one of the functions of the first to seventh embodiments.
- the terminal device 1 uses the functions of any of the first to seventh embodiments to use the radio resource allocation request and the reception response. Send.
- FIG. 30 is a hardware configuration diagram of the terminal device according to each embodiment.
- the terminal device 1 includes a processor 901, a main storage device 902, an image display device 903, an auxiliary storage device 904, and a wireless device 905.
- the processor 901 is connected to the main storage device 902, the image display device 903, the auxiliary storage device 904, and the wireless device 905 via a bus.
- the wireless device 905 is connected to an antenna.
- the image display device 903 is, for example, a liquid crystal display.
- the image display device 903 displays data transmitted from the base station device 2 and provides it to the operator.
- the auxiliary storage device 904 includes various programs including the programs for realizing the functions of the PDCCH reception processing unit 12, the PDSCH reception processing unit 13, the ACK / NACK generation unit 14, the PUCCH generation unit 16, and the PUSCH generation unit 17 illustrated in FIG. Store the program.
- the auxiliary storage device 904 stores various programs including programs for realizing the functions of the propagation channel estimation unit 31 and the surplus power calculation unit 32.
- the processor 901 reads out various programs stored in the auxiliary storage device 904, develops them on the main storage device 902, and executes them. Accordingly, the processor 901 realizes the functions of the PDCCH reception processing unit 12, the PDSCH reception processing unit 13, the ACK / NACK generation unit 14, the PUCCH generation unit 16, and the PUSCH generation unit 17 illustrated in FIG.
- the processor 901 stores various programs including programs for realizing the functions of the propagation channel estimation unit 31 and the surplus power calculation unit 32.
- the wireless device 905 realizes the function of the wireless unit 11.
- the wireless device 905 performs wireless communication with the base station apparatus 2 via an antenna.
- FIG. 31 is a hardware configuration diagram of the base station apparatus according to each embodiment.
- the base station apparatus 2 includes a processor 911, a main storage device 912, a network interface 913, an auxiliary storage device 914, and a wireless device 915.
- the processor 911 is connected to the main storage device 912, the network interface 913, the auxiliary storage device 914, and the wireless device 915 via a bus.
- the wireless device 915 is connected to an antenna.
- the network interface 913 is an interface used for communication with a host device.
- the main storage device 912 implements the function of the buffer 22 illustrated in FIG.
- the auxiliary storage device 914 stores various programs including programs for realizing the functions of the PUCCH resource management unit 21, the scheduler 23, the downlink signal baseband processing unit 24, and the uplink signal baseband processing unit 25 illustrated in FIG. .
- the various programs stored in the processor 911 and the auxiliary storage device 914 are read out, developed on the main storage device 912, and executed.
- the processor 911 implements the functions of the PUCCH resource management unit 21, the scheduler 23, the downlink signal baseband processing unit 24, and the uplink signal baseband processing unit 25 illustrated in FIG.
- the wireless device 915 implements the function of the wireless unit 26.
- the wireless device 915 performs wireless communication with the terminal device 1 via an antenna.
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Abstract
Description
次に、図30を参照して、端末装置1のハードウェア構成について説明する。図30は、各実施例に係る端末装置のハードウェア構成図である。端末装置1は、プロセッサ901、主記憶装置902、画像表示装置903、補助記憶装置904及び無線機905を有する。
2 基地局装置
11 無線部
12 PDCCH受信処理部
13 PDSCH受信処理部
14 ACK/NACK生成部
15 SR生成部
16 PUCCH生成部
17 PUSCH生成部
18 バッファ
21 PUCCHリソース管理部
22 バッファ
23 スケジューラ
24 下り信号ベースバンド処理部
25 上り信号ベースバンド処理部
26 無線部
181 第1バッファ
182 第2バッファ
Claims (12)
- 基地局装置から無線信号を受信する受信部と、
前記受信部による前記無線信号の受信結果を複数分通知する受信応答を生成する応答信号生成部と、
前記受信応答を含む異なる複数の種類の信号を同じタイミングで送信する場合と1つの種類の信号を送信する場合とで、信号の送信に用いる無線リソースの大きさ又は位置を異ならせる送信部と
を備えたことを特徴とする端末装置。 - 特定の信号を前記基地局装置へ送信するための無線リソース割当要求を生成する無線リソース割当要求生成部をさらに備え、
前記送信部は、前記受信応答及び前記無線リソース割当要求を同じタイミングで送信する場合と前記無線リソース割当要求を送信せずに前記受信応答を送信する場合とで、前記受信応答の送信に用いる無線リソースの大きさ又は位置を異ならせる
ことを特徴とする請求項1に記載の端末装置。 - 前記送信部は、前記受信応答及び前記無線リソース割当要求を同じタイミングで送信する場合、前記受信応答及び前記無線リソース割当要求の送信に割り当てられた無線リソースの一部分を使用して前記受信応答及び前記無線リソース割当要求を送信することを特徴とする請求項2に記載の端末装置。
- 前記送信部は、前記受信応答に割り当てられた無線リソースの一部を送信しないことで前記無線リソース割当要求の発生を通知することを特徴とする請求項2又は3に記載の端末装置。
- 前記送信部は、前記無線リソース割当要求に割り当てられた無線リソースを用いて前記受信応答の一部を送信することを特徴とする請求項4に記載の端末装置。
- 前記送信部は、前記無線リソース割当要求に割り当てられた無線リソースを用いて前記無線リソース割当要求を送信し、且つ、前記受信応答に割り当てられた無線リソースの一部を用いて前記受信応答を送信することを特徴とする請求項2又は3に記載の端末装置。
- 前記受信部は、所定サイズのデータを有する複数の第1グループを含む前記無線信号を受信し、
前記応答信号生成部は、前記第1グループを結合した第2グループ毎に受信応答を生成する
ことを特徴とする請求項2又は3に記載の端末装置。 - 前記送信部は、前記無線リソース割当要求の種別に応じて、前記受信応答の送信に用いる無線リソースの大きさ又は位置を異ならせることを特徴とする請求項2又は3に記載の端末装置。
- 前記送信部は、前記無線リソース割当要求の種別毎に送信電力密度を調整するパラメータを有し、前記無線リソース割当要求の種別に応じて前記無線リソース割当要求及び前記受信応答の送信時に前記パラメータを変更することを特徴とする請求項2又は3に記載の端末装置。
- 基地局装置から無線信号を受信する受信部、前記受信部による前記無線信号の受信結果を複数分通知する受信応答を生成する応答信号生成部、及び、前記受信応答を含む異なる複数の種類の信号を同じタイミングで送信する場合と1つの種類の信号を送信する場合とで、信号の送信に用いる無線リソースの大きさ又は位置を異ならせる送信部を有する端末装置から送信された送信信号を受信する基地局受信部と、
異なる複数の種類の信号が同じタイミングで送信された場合、前記基地局受信部により受信された前記送信信号で使用された無線リソースを基に、前記受信応答を取得する取得部と
を備えたことを特徴とする基地局装置。 - 端末装置及び基地局装置を有する無線通信システムであって、
前記端末装置は、
前記基地局装置から無線信号を受信する受信部と、
前記受信部による前記無線信号の受信結果を複数分通知する受信応答を生成する応答信号生成部と、
前記受信応答を含む異なる複数の種類の信号を同じタイミングで送信する場合と1つの種類の信号を送信する場合とで、信号の送信に用いる無線リソースの大きさ又は位置を異ならせる送信部とを備え、
前記基地局装置は、
前記送信部から送信された送信信号を受信する基地局受信部と、
異なる複数の種類の信号が同じタイミングで前記送信部から送信された場合、前記基地局受信部により受信された前記送信信号で使用された前記無線リソースの大きさ又は位置を基に、前記受信応答を取得する取得部とを備えた
ことを特徴とする無線通信システム。 - 基地局装置から無線信号を受信し、
前記無線信号の受信結果を複数分通知する受信応答を生成し、
特定の信号を前記基地局装置へ送信するための無線リソース割当要求を生成し、
前記受信応答を含む異なる複数の種類の信号を同じタイミングで送信する場合と1つの種類の信号を送信する場合とで、信号の送信に用いる無線リソースの大きさ又は位置を異ならせる
ことを特徴とする端末装置制御方法。
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