Title of invention: Transmitter, receiver, wireless communication system, and communication method
Technical field
[0001]
　The present invention relates to a transmitting device, a receiving device, a wireless communication system, and a communication method.
Background technology
[0002]
　In the current network, the traffic of mobile terminals (smartphones and future phones) occupies most of the network resources. In addition, the traffic used by mobile terminals tends to increase in the future.
[0003]
　On the other hand, in line with the development of IoT (Internet of things) services (for example, monitoring systems for transportation systems, smart meters, devices, etc.), it is required to support services with various requirements. Therefore, in the communication standard of the 5th generation mobile communication (5G or NR (New Radio)), in addition to the standard technology of 4G (4th generation mobile communication) (for example, Non-Patent Documents 1 to 11), further There is a demand for technology that realizes high data rates, large capacities, and low delays.
[0004]
　Regarding the 5th generation communication standard, technical studies are underway in the working group of 3GPP (Third Generation Partnership Project) (for example, TSG-RAN WG1, TSG-RAN WG2, etc.) (Non-Patent Documents 12 to 39). ..
[0005]
　As mentioned above, 5G is classified into eMBB (Enhanced Mobile Broad Band), Massive MTC (Machine Type Communications), and URLLC (Ultra-Reliable and Low Latency Communication) in order to support a wide variety of services. We anticipate support for many use cases.
[0006]
　On the other hand, in 4G, a function for performing communication in the low frequency band (5 GHz band) of the Unlicensed spectrum (or the Unlicensed band) has been introduced. As such a function, for example, there is LTE-LAA (Long Term Evolution-Licensed Assisted Access). LTE-LAA is, for example, a technique in which the frequency band of the Unlicensed spectrum and the frequency band of the Received spectrum are bundled and used at the same time. With LTE-LAA, for example, high speed and large capacity can be realized.
[0007]
　In LTE-LAA, the Listen-Before-Talk (LBT) method is adopted for communication in the low frequency band (5 GHz band) Contented spectrum. In the LBT method, for example, the transmitting side performs carrier sensing (or carrier sense) before starting signal transmission, and after confirming that the radio channel is in the "Idle" state (no other communication is being performed). Start data transmission. By the LBT method, fair coexistence can be realized between different networks such as Wifi and LTE.
[0008]
　However, in LTE, transmission / reception based on subframe timing is basic. When the LBT method is used at the subframe timing, the transmission opportunity is given at the subframe timing, so that the transmission opportunity may be limited.
[0009]
　Therefore, in LTE-LAA, a method capable of transmitting at the start timing (or the start symbol) of the subframe and half the timing (or the eighth symbol from the start symbol) of the subframe is also specified. 30 (A) and 30 (B) show an example. This makes it possible, for example, to increase the transmission opportunity on the transmitting side and prevent the complexity of the transmission / reception processing from becoming extremely increased on both the transmitting side and the receiving side.
[0010]
　As shown in FIG. 30 (B), in the case of half the timing of the subframe, the data included in TB (Transport Block) # 0 is transmitted from the timing of the first symbol of the subframe shown in FIG. 30 (A). It will be halved compared to the case where it is done. Therefore, it is also specified in 3GPP that the transmitting side halves the unencoded data included in TB # 0 and transmits the data.
[0011]
　On the other hand, in 5G, as in 4G, the base station determines (or schedules) the allocation of radio resources, the coding rate of error correction coding, the modulation method, and the like, and transmits the scheduling result to the terminal. In this case, the base station transmits DCI (Downlink Control Information) including the scheduling result to the terminal by using PDCCH (Physical Downlink Control CHannel). The terminal uses PDSCH (Physical Downlink Shared CHannel) to extract data addressed to its own station from the received signal, or uses PUSCH (Physical Uplink Shared CHannel) to extract data according to the scheduling result included in DCI. Can be transmitted to the base station.
[0012]
　31 (A) and 31 (B) are diagrams showing resource allocation in the time direction by DCI specified in 5G. FIG. 31 (A) shows PDSCH, and FIG. 31 (B) shows resource allocation in the time direction in PUSCH. In FIGS. 31 (A) and 31 (B), for example, “S” represents the start symbol of the slot, and “L” represents the number of consecutive symbols (or lengths) counted from the start symbol S, respectively.
[0013]
　FIG. 31C shows an example of resource allocation (or mapping. In the following, allocation and mapping may be used without distinction) in the time direction. For example, in the case of S = 2 and L = 4, the start symbol is the third symbol from the first symbol (S = 0) in one slot, and the length thereof is four consecutive symbols from S = 2. Represents that. When such resource allocation in the time direction is performed, in the case of PDSCH, the terminal extracts data addressed to its own station by using four symbols starting with S = 2.
[0014]
　As shown in FIG. 31C, in 4G, 1 subframe = 14 symbols (= 1 ms), but in 5G, 1 slot = 14 symbols. Further, in 5G, a plurality of subcarrier intervals can be used, and when the subcarrier interval is 15 kHz, 1 slot = 1 ms, when the subcarrier interval is 30 kHz, 1 slot = 0.5 ms, etc., depending on the subcarrier interval. And the slot length changes.
[0015]
　In 5G, as shown in FIGS. 31 (A) and 31 (B), it is possible to allocate radio resources in the time direction in symbol units, and it is possible to flexibly allocate radio resources.
Prior art literature
Non-patent literature
[0016]
Non-Patent Document 1: 3GPP TS 36.211 V15.1.0 (2018-03)
Non-Patent Document 2: 3GPP TS 36.212 V15.1.0 (2018-03)
Non-Patent Document 3: 3GPP TS 36.213 V15.1.0 (2018-03)
Non -Patent Document Document 4: 3GPP TS 36.300 V15.1.0 (2018-03)
Non-Patent Document 5: 3GPP TS 36.321 V15.1.0 (2018-03)
Non-Patent Document 6: 3GPP TS 36.322 V15.0.1 (2018-04)
Non-Patent Document 7 : 3GPP TS 36.323 V14.5.0 (2017-12)
Non-Patent Document 8: 3GPP TS 36.331 V15.1.0 (2018-03)
Non-Patent Document 9: 3GPP TS 36.413 V15.1.0 (2018-03)
Non-Patent Document 10: 3GPP TS 36.423 V15.1.0 (2018-03)
Non-Patent Document 11: 3GPP TS 36.425 V14.1.0 (2018-03)
Non-Patent Document 12: 3GPP TS 37.340 V15.1.0 (2018-03)
Non-Patent Document 13: 3GPP TS 38.201 V15.0.0 (2017-12)
Non-Patent Document 14: 3GPP TS 38.202 V15.1.0 (2018-03)
Non-Patent Document 15: 3GPP TS 38.211 V15.1.0 (2018-03)
Non-Patent Document 16: 3GPP TS 38.212 V15.1.1 (2018-04)
Non -Patent Document Document 17: 3GPP TS 38.213 V15.1.0 (2018-0312)
Non-Patent Document 18: 3GPP TS 38.214 V15.1.0 (2018-03)
Non-Patent Document 19: 3GPP TS 38. 215 V15.1.0 (2018-03)
Non-Patent Document 20: 3GPP TS 38.300 V15.1.0 (2018-03)
Non-Patent Document 21: 3GPP TS 38.321 V15.1.0 (2018-03)
Non-Patent Document 22: 3GPP TS 38.322 V15.1.0 (2018-03)
Non-Patent Document 23 : 3GPP TS 38.323 V15.1.0 (2018-03)
Non-Patent Document 24: 3GPP TS 38.331 V15.1.0 (2018-03)
Non-Patent Document 25: 3GPP TS 38.401 V15.1.0 (2018-03)
Non-Patent Document 26: 3GPP TS 38.410 V0.9.0 (2018-04)
Non-Patent Document 27: 3GPP TS 38.413 V0.8.0 (2018-04)
Non-Patent Document 28: 3GPP TS 38.420 V0.8.0 (2018-04)
Non-Patent Document 29: 3GPP TS 38.423 V0.8.0 (2018-04)
Non -Patent Document Document 30: 3GPP TS 38.470 V15.1.0 (2018-03)
Non-Patent Document 31: 3GPP TS 38.473 V15.1.1 (2018-04)
Non-Patent Document 32: 3GPP TR 38.801 V14.0.0 (2017-04)
Non-Patent Document 33 : 3GPP TR 38.802 V14.2.0 (2017-09)
Non-Patent Document 34: 3GPP TR 38.803 V14.2.0 (2017-09)
Non-Patent Document 35: 3GPP TR 38.804 V14.0.0 (2017-03)
Non-Patent Document 36: 3GPP TR 38.900 V14.3.1 (2017-07)
Non-Patent Document 37: 3GPP TR 38.912 V14.1.0 (2017-06)
Non-Patent Document 38: 3GPP TR 38.913 V14.3.0 (2017-06)
Non-Patent Document 39: "Enriched feedback for adaptive HARQ", Nokia, Alcatel-Lucent Shanghai Bell, R1-1701020, 3GPP TSG RAN WG1 NR Ad-Hoc Metting, Spokane, 16-20 January, 2017
Outline of the invention
Problems to be solved by the invention
[0017]
　However, as described above, with respect to the Unlicensed band, in LTE-LAA, the transmission opportunity is a maximum of two times per subframe (= 1 ms). Throughput may decrease with a maximum of two transmission opportunities per subframe.
[0018]
　The disclosed technique has been made in view of the above and aims to improve throughput.
Means to solve problems
[0019]
　On one side, it is confirmed that the first frequency band, which does not require a license, is not used by another transmitting device in the transmitting device capable of wireless communication with the receiving device. , A first symbol including a first control channel and a first shared channel in the first communication direction, or a second shared channel in a second communication direction different from the first communication direction. A control unit that shifts the second symbol in the time direction, and the first control signal and the first data assigned to the first symbol are transferred to the first control channel and the first shared channel. The second data assigned to the second symbol is transmitted to the receiving device by using the second shared channel.
Effect of the invention
[0020]
　Throughput can be improved.
A brief description of the drawing
[0021]
FIG. 1 is a diagram showing a configuration example of a wireless communication system.
2 (A) is a configuration example of one slot, and FIGS. 2 (B) and 2 (C) are diagrams showing a TB transmission example.
FIG. 3 is a diagram illustrating an example of a protocol stack.
4 (A) and 4 (B) are diagrams showing a transmission example of PDCCCH and PDSCH.
5 (A) is a diagram showing an example of an exchange sequence of an RRC message, and FIG. 5 (B) is a diagram showing an example of a configuration of an RRC Configuration message.
FIG. 6 is a diagram showing an example of IE included in PDSCH-Config or PUSCH-Config.
7 (A) and 7 (B) are diagrams showing an example of PUSCH transmission.
8 (A) and 8 (B) are diagrams showing a transmission example of PDCCH and PDSCH.
FIG. 9 is a diagram showing an example of information contained in PDCCH.
10 (A) to 10 (C) are diagrams showing an example of information contained in PDCCH.
FIG. 11 is a diagram showing an example of NDI.
12 (A) to 12 (C) are diagrams showing a transmission example of PDCCH and PDSCH.
FIG. 13 is a diagram showing an example of IE included in PDSCH-Config.
FIG. 14 is a diagram showing an example of information contained in PDCCH.
15 (A) and 15 (B) are diagrams showing a transmission example of PDCCH and PDSCH.
16A is a diagram showing a configuration example of a base station, and FIG. 16B is a diagram showing a configuration example of a baseband signal processing unit.
17A is a diagram showing a configuration example of a terminal, and FIG. 17B is a diagram showing a configuration example of a baseband signal processing unit.
FIG. 18 is a flowchart showing an operation example of a base station.
FIG. 19 is a flowchart showing an operation example of a terminal.
FIG. 20 is a flowchart showing an operation example of a terminal.
FIG. 21 is a flowchart showing an operation example of a base station.
FIG. 22 is a flowchart showing an operation example of a base station.
FIG. 23 is a flowchart showing an operation example of a terminal.
[Fig. 24] Fig. 24 (A) and FIG. 24 (B) are diagrams showing an example of transmission of PDCCH and PDSCH.
FIG. 25 is a diagram showing a setting example of monitoringSymbolsWithslot.
FIG. 26 is a diagram showing an example of IE included in PDSCH-Config or PUSCH-Config.
27 (A) and 27 (B) are diagrams showing a monitoring example.
28 (A) is a diagram showing a base station, and FIG. 29 (B) is a diagram showing an example of hardware configuration of a terminal.
29 (A) and 29 (B) are diagrams showing an example of transmission of PUCCH and PUSCH.
30 (A) and 30 (B) are diagrams showing a TB transmission example.
31 (A) and 31 (B) are diagrams showing specifications of a start symbol and a length, and FIG. 31 (C) is a diagram showing an example of setting a start symbol and a length, respectively.
Mode for carrying out the invention
[0022]
　Hereinafter, the present embodiment will be described in detail with reference to the drawings. The issues and examples in this specification are examples, and do not limit the scope of rights of the present application. In particular, even if the described expressions are different, the techniques of the present application can be applied even if they are technically equivalent, and the scope of rights is not limited. Then, each embodiment can be appropriately combined as long as the processing contents do not contradict each other.
[0023]
　In addition, as the terms used in the present specification and the technical contents described, the terms and the technical contents described in the specifications and contributions may be appropriately used as standards related to communication such as 3GPP. Such specifications include, for example, 3GPP TS 38.211 V15.1.0 (2018-03).
[0024]
　The 3GPP specifications will be updated from time to time. Therefore, the latest specifications at the time of filing the application may be used as the specifications described above. Then, the terms and technical contents described in the latest specifications may be used appropriately in the present specification.
[0025]
　Hereinafter, examples of the base station, the terminal, the wireless communication system, and the communication method disclosed in the present application will be described in detail with reference to the drawings. The following embodiments do not limit the disclosed technology.
[0026]
　[First Embodiment]
　<1. Configuration Example of Wireless Communication System>
　FIG. 1 is a diagram showing a configuration example of the wireless communication system 10 according to the first embodiment.
[0027]
　The wireless communication system 10 includes a base station device (hereinafter, may be referred to as a “base station”) 100 and a plurality of terminal devices (hereinafter, may be referred to as a “terminal”) 200-1,200-2. Be prepared.
[0028]
　The base station 100 wirelessly communicates with terminals 200-1 and 200-2 within the service provision range (or cell range) of its own station, and provides various services such as a call service and a Web browsing service. It is a wireless communication device.
[0029]
　Further, the base station 100 performs scheduling as described above, and determines the allocation of radio resources, the coding rate, the modulation method, and the like for the terminals 200-1 and 200-2. Then, the base station 100 includes the scheduling result in the control signal and transmits it to the terminals 200-1 and 200-2 by using the PDCCH. Each terminal 200-1 or 200-2 extracts data addressed to its own station from the signal received by using PDSCH according to the scheduling result included in the control signal, or transfers the data to the base station 100 by using PUSCH. You can send it.
[0030]
　The communication direction from the base station 100 to the terminals 200-1 and 200-2 may be referred to as a downlink direction, and the communication direction from the terminals 200-1 and 200-2 to the base station 100 may be referred to as an uplink direction.
[0031]
　For example, in the downlink direction, the base station 100 is a transmitting device, terminals 200-1 and 200-2 are receiving devices, and in the upstream direction, terminals 200-1 and 200-2 are transmitting devices and the base station 100 is a receiving device. Can be.
[0032]
　It should be noted that the terminals 200-1 and 200-2 can transmit the control signal even in the upstream direction, and in this case, the uplink control signal is transmitted by using the PUCCH (Physical Uplink Control CHannel). As an example of the uplink control signal, for example, an ACK (Acknowledgement) signal or an NACK (Negative Acknowledgement) signal (hereinafter, referred to as “ACK” or “NACK” may be referred to as indicating whether or not data has been normally received. There is.)
[0033]
　The terminals 200-1 and 200-2 are wireless communication devices capable of wireless communication, such as feature phones, smartphones, personal computers, tablet terminals, and game devices. Each of the terminals 200-1 and 200-2 can receive the various services described above via the base station 100.
[0034]
　In the example of FIG. 1, the base station 100 represents an example of wireless communication with two terminals 200-1 and 200-2. For example, in the wireless communication system 10, the base station 100 may perform wireless communication with one terminal 200-1 or may perform wireless communication with three or more terminals. The number of terminals 200-1 and 200-2 may be one or a plurality.
[0035]
　In the first embodiment, the base station 100 and the terminals 200-1 and 200-2 can perform wireless communication using the Unlicensed band.
[0036]
　The frequencies used in wireless communication are assigned by each country giving a license to a specific operator in consideration of the frequency allocation established by the ITU-R (International Telecommunication Radiocommunication Sector) and the circumstances of each country. .. The operator can occupy a licensed frequency to carry out a mobile communication business (or wireless communication business). The frequency band licensed and assigned to the operator may be referred to as, for example, a Selected band. On the other hand, the Unified band is, for example, a frequency band that can be used by a plurality of operators without a license. The United band is, for example, a frequency band that does not require a license, and the Licensed band is also, for example, a frequency band that requires a license. Examples of the United band include an ISM band (Industry Science Medical band) and a 5 GHz band.
[0037]
　Then, when the base station 100 and the terminals 200-1 and 200-2 perform wireless communication using the Unlicensed band, the LBT method is used to confirm whether or not the frequency band is available. For example, the base station 100 and the terminals 200-1 and 200-2 perform the following processing.
[0038]
　That is, the base station 100 and the terminals 200-1 and 200-2 perform carrier sense in the available frequency band of the unlicensed band. When the frequency band of the base station 100 and the terminals 200-1 and 200-2 is in the "idol" state, the base station 100 and the terminals 200-1 and 200-2 use the frequency band to perform wireless communication. The "idol" state is, for example, a state in which the signal strength of the received signal is smaller than the threshold value. In this case, the base station 100 and the terminals 200-1 and 200-2 confirm that the frequency band is not used by other base stations and terminals, and the frequency band can be used. .. On the other hand, the base station 100 and the terminals 200-1 and 200-2 do not use the frequency band when the frequency band is in the "Busy" state. The "Busy" state is, for example, a state when the signal strength of the received signal is equal to or higher than the threshold value. In this case, the base station 100 and the terminals 200-1 and 200-2 perform carrier sense for the frequency band again when a predetermined time elapses after confirming the "Busy" state.
[0039]
　The detailed operation of the carrier sense follows, for example, the method described in 3GPP TS 37.213 V15.0.0 (2018-06). Depending on the content of the signal to be transmitted, it is defined that the transmission can be performed in the "Idle" state with one carrier sense, and the transmission can be performed only after the "Idle" state has passed a specified number of times. In either case, the result of one carrier sense just before transmitting the signal must be in the "Idle" state.
[0040]
　The base station 100 and the terminals 200-1 and 200-2 can perform wireless communication not only by using the Licensed band but also by using the Licensed band.
[0041]
　In the following, the Unlicensed band may be referred to as an unlicensed band, and the Licensed band may be referred to as a licensed band, for example.
[0042]
　Further, terminals 200-1 and 200-2 may be referred to as terminal 200.
[0043]
　Further, the control signal in the downward direction may be referred to as, for example, PDCCH. Therefore, transmitting a control signal in the downward direction may be referred to as, for example, transmitting a PDCCH. Further, the data in the downward direction may be referred to as PDSCH, for example. Further, for example, the control signal in the upward direction may be referred to as PUCCH, and the data in the upward direction may be referred to as PUSCH.
[0044]
　Further, in the following, the control signal and the DCI may be used without distinction.
[0045]
　Further, in the following, LBT and carrier sense may be used without distinction.
[0046]
　<2. Regarding radio resources in the time direction>
　FIG. 2A is a diagram showing a configuration example of one slot defined by 5G. As mentioned above, in LTE, 14 symbols are one subframe. However, in 5G, as shown in FIG. 2A, 14 symbols form one slot. FIG. 2A shows, for example, one slot in a frequency band having an unlicensed band.
[0047]
　FIG. 2B is a diagram showing an example of TB transmission in the time direction in a frequency band having an unlicensed band.
[0048]
　For example, since the base station 100 performs carrier sense for this frequency band and confirms that it is in the "idol" state, it transmits the data contained in TB # a from the first slot using all the symbols. ing. Then, for example, the base station 100 also transmits the data of TB # b assigned to the next slot by using all the symbols of the next slot. In the example shown in FIG. 2B, the data included in each TB is transmitted as assigned to each slot.
[0049]
　In the following, it may be referred to as transmitting the data included in the TB, for example, transmitting the TB.
[0050]
　In FIG. 2B, TTI is also shown. The TTI is, for example, the arrival time interval of the TB set, and represents the minimum period of the scheduling period (or cycle) allocated by one control signal transmitted using the PDCCH. Therefore, it is permissible for the TTI to include a plurality of TTIs, for example, by one PDCCH. Details will be described later, but the example of FIG. 7A represents an example in which two TTIs are scheduled by one PDCCH.
[0051]
　For example, in the example of FIG. 2B, one PDCCH assigns TB # a to the first slot, and another PDCCH assigns TB # b to the slot next to the first slot. Therefore, the first slot becomes one TTI, and the next slot becomes another TTI. For example, when two PDCCHs are assigned to different symbols in one slot, there will be two TTIs in one slot.
[0052]
　FIG. 2C is also a diagram showing an example of TB transmission in the time direction, similarly to FIG. 2B. However, the example of FIG. 2C represents an example in which the transmission start timing is shifted by the carrier sense with respect to the example of FIG. 2B.
[0053]
　In the example of FIG. 2C, as a result of carrier sense, the first symbol of the first slot is in the “Busy” state. Further, after that, a carrier sense is performed, and the third symbol is also in the "Busy" state. Further, after that, the carrier sense is performed and the state becomes "Idle", so that the signal transmission is started from the 5th symbol. In the example of FIG. 2C, the fifth symbol of the first slot (when symbol 0 is the first symbol, symbol 4) is the data transmission start timing.
[0054]
　When FIGS. 2B and 2C represent a transmission example in the downward direction, the first symbol at the transmission start timing (the first symbol in the example of FIG. 2B, FIG. 2C). In the example, the PDCCH and the PDSCH are transmitted using the fifth symbol). In 5G, unlike 4G, PDCCH and PDSCH can be assigned to one symbol. In this case, the transmission shown in FIGS. 2 (B) and 2 (C) is performed by, for example, the base station 100.
[0055]
　Further, when FIGS. 2B and 2C show an example of transmission in the upward direction, PUCCH and PUSCH are transmitted by using the first symbol at the transmission start timing. In this case, the transmission shown in FIGS. 2 (B) and 2 (C) is performed by, for example, the terminal 200.
[0056]
　On the other hand, as shown in FIG. 2B, all 14 symbols in one slot are assigned to TB # a. In the example shown in FIG. 2C, since transmission is started from the 5th symbol, data for 10 symbols included in TB # a can be transmitted in the first slot, but for the remaining 4 symbols. Data cannot be sent. In this case, in the example of FIG. 2C, the data for the remaining 4 symbols included in TB # a, which could not be transmitted in the first slot, is transmitted using the first 4 symbols in the next slot. ..
[0057]
　Therefore, the data for 14 symbols included in TB # a is transmitted using the 10 symbols in the first slot and the first 4 symbols in the next slot. In this case, the first slot and the next slot are, for example, resources in the time direction allocated by different PDCCHs. In this case, the TB # a data is allocated resources in the time direction across two slots allocated by different PDCCHs. For example, since the scheduling period allocated by one PDCCH is one TTI, the data of TB # a is transmitted to the same terminal 200 across the two TTIs.
[0058]
　If all of the data cannot be transmitted in the first slot (or first TTI) due to carrier sense, the data portion that could not be transmitted may be transmitted in the next TTI, for example, "Cross TTI" (or cross TTI). ) May be called. Alternatively, cross-TTI means, for example, that the same data is transmitted across a plurality of TTIs. For example, in FIG. 2C, TB # a could not be transmitted in the first TTI, so that it is transmitted in the next TTI and is transmitted in the cross TTI.
[0059]
　The cross TTI can be set by, for example, an RRC (Radio Resource Control) message or a PDCCH. Details will be described later.
[0060]
　As described above, in the first embodiment, for example, as shown in FIG. 2C, the symbol including PDCCH and PDSCH or the symbol including PUCCH and PUSCH can be shifted in the time direction. .. Therefore, as in LTE-LAA, not only the first symbol (first symbol) and its intermediate symbol (eighth symbol from the first symbol) in the slot, but also other symbols as shown in FIG. 2 (C). Data can be transmitted even from symbols. Therefore, in the first embodiment, the transmission opportunity is increased as compared with the case where the data is transmitted from the first symbol in the slot and the intermediate symbol thereof, so that the throughput can be improved.
[0061]
　Further, in the first embodiment, data addressed to the same terminal 200 is transmitted by cross TTI. In this case, as shown in the example of FIG. 2C, the transmitting side does not wait for ACK or NACK, but at the head TTI (or the next slot) next to the head TTI (or slot) The remaining data of TB # a that could not be transmitted is being transmitted. Therefore, since the transmission device can transmit data without waiting for ACK or NACK, it is possible to improve the throughput as compared with the case of transmitting after waiting for ACK or NACK.
[0062]
　Further, in the first embodiment, the transmitting side transmits the signal that could not be transmitted in the first slot as it is in the next slot due to the carrier sense. Compared with the case where a certain process is applied to the signal, in the first embodiment, since the signal is transmitted as it is, it is possible to reduce the complexity of the transmission process on the transmitting side and the receiving process on the receiving side. Become.
[0063]
　Hereinafter, the first embodiment will be described separately for each case. First, the relationship between the RRC message and the PDCCH will be described. Next, as a specific example, 1) a case where the cross TTI is set by the RRC message when the PDCCH and the PDSCH are shifted will be described. Next, 2) a case where the cross TTI is set from the RRC message when the PUSCH shifts will be described. Next, 3) a case where the cross TTI is set by the PDCCH in the case where the PDCCH and the PDSCH shift will be described.
[0064]
　As shown in FIG. 2B, all the symbols in the slot are assigned to TB # b in the slot next to the first slot. In this case, as shown in FIG. 2C, the transmission device cannot transmit data for four symbols of TB # b in the slot next to the first slot due to the cross TTI of TB # a. In this case, the transmitting device can further transmit the data for four symbols that could not be transmitted by using the next slot (the slot next to the first slot). The transmitting device can also transmit TB # b by cross TTI.
[0065]
　Further, in the example shown in FIG. 2C, an example in which carrier sense is performed every two symbols is described, but it may be every one symbol or every three symbols or more.
[0066]
　<3. Relationship between RRC Message and PDCCH>
　FIG. 3 is a diagram showing an example of a protocol stack between the base station 100 and the terminal 200 in 5G. As shown in FIG. 3, the PDCCH is contained in the lowermost physical layer (PHY), and the RRC message is contained in the RRC layer higher than the physical layer.
[0067]
　PDCCH is transmitted for each TTI, for example. Therefore, the PDCCH has a large overhead as compared with the RRC message, but the control can be changed in real time and is flexible.
[0068]
　On the other hand, the RRC message is transmitted every several hundred ms, for example. Therefore, the RRC message has less overhead than the PDCCH, but it is difficult to change the control in real time, and the flexibility is poor.
[0069]
　It can be said that PDCCH and RRC messages are in a trade-off relationship with respect to overbed and flexibility, for example.
[0070]
　<4.1 When a cross TTI is set by an RRC message when the PDCCH and the PDSCH are shifted>
　FIGS. 4 (A) and 4 (B) are diagrams showing a transmission example of the PDCCH and the PDSCH.
[0071]
　In the example of FIG. 4A, the base station 100 allocates the data included in TB # a to all the symbols in the first slot in the downlink direction by scheduling, and assigns the data included in TB # a to all the symbols in the slot next to the first slot by scheduling. The data of TB # b is assigned to it. Further, in the example of FIG. 4A, PDCCH is assigned to the first and second symbols at the beginning. In 5G, PDCCH is allowed from 1 symbol length to 3 symbol length. Therefore, PDCCH may be included only in the first symbol, or may be included in the first to third symbols.
[0072]
　In the example of FIG. 4A, the base station 100 performs carrier sense in the unlicensed band and confirms that it is in the “Idle” state at the time of the first symbol of the first slot. In turn, PDCCH # a and PDSCH (TB # a) assigned to each symbol are transmitted. Then, the base station 100 also transmits PDCCH # b and PDSCH (TB # b) assigned to each symbol in order from the first symbol in the slot next to the first slot.
[0073]
　On the other hand, in the example of FIG. 4B, the base station 100 performs carrier sense in the unlicensed band and confirms that it is in the “Busy” state at the time of the first symbol of the first slot. Therefore, the base station 100 does not transmit PDCCH # a and PDSCH (TB # a), and subsequently PDCCH # b and PDSCH (TB # b) at this timing.
[0074]
　The base station 100 performs carrier sense again after a predetermined time elapses after the first carrier sense (after 2 symbol times have elapsed in the example of FIG. 4A), and at the time of the third symbol in the first slot. , It is confirmed that it is in the "Busy" state. Therefore, the base station 100 does not perform transmission even at this point.
[0075]
　Then, after a predetermined time has elapsed from the second carrier sense, the base station 100 performs the carrier sense again, and confirms the "Idle" state at the time of the fifth symbol of the first slot. Therefore, the base station 100 transmits PDCCH # a and PDSCH (TB # a) at the time of the fifth symbol as the transmission start timing. In this case, the base station 100 transmits data allocated to 10 symbols from the 5th symbol to the 14th symbol of the first slot for TB # a. Therefore, of the TB # a assigned to all the symbols in the first slot, the remaining four symbols of TB # a assigned to the 11th to 14th symbols will not be transmitted in the first slot.
[0076]
　Then, the base station 100 uses the cross TTI to transmit TB # a for the remaining four symbols. That is, in the example of FIG. 4B, the base station 100 utilizes the last 4 symbols (11th to 14th symbols) of the next slot and TB # a for the remaining 4 symbols that were not transmitted. To send. In this case, the base station 100 transmits data for the remaining four symbols using the last four symbols of the next slot without receiving ACK or NACK from the terminal 200.
[0077]
　The DCI transmitted using the PDCCH has a start symbol S and a continuous length from the start symbol (hereinafter, may be referred to as “length”) as resource allocation in the PDSCH time direction. L and are included. In the example of FIG. 4A, DCI including S = 0 and L = 14 is transmitted using PDCCH.
[0078]
　In the first embodiment, the base station 100 has the same contents of the start symbol S and the length L included in the DCI even when there are a plurality of transmission opportunities due to carrier sense. Therefore, the base station 100 has a PDCCH # a transmitted from the first symbol as shown in FIG. 4 (A) and a PDCCH # a transmitted from the fifth symbol as shown in FIG. 4 (B). In, both the start symbol S and the length L transmit a DCI including S = 0 and L = 14.
[0079]
　In this case, in the example of FIG. 4A, the terminal 200 can receive all of the PDCCH and PDSCH of S = 0 and L = 14. However, in the example of FIG. 4B, the terminal 200 has not received the PDDCH and the PDSCH at the time of S = 0. Further, the terminal 200 does not receive the PDSCH for the length of L = 14 when the one slot time ends. That is, the terminal 200 can grasp that there is a shortage of PDSCH by using the start symbol S and the length L. In this case, the terminal 200 interprets the shortage of PDSCH as "not transmitted". Details will be described in the operation example.
[0080]
　In the first embodiment, the start symbol S is defined as, for example, a symbol that can actually start the transmission burst. For example, in the example of FIG. 4A, transmission of the transmission burst is started from the first symbol (symbol 0) in one slot, and in the example of FIG. 4B, transmission is started from the fifth symbol (symbol 4). Transmission of transmission burst has started. In this case, the start symbol S is S = 0 in each case.
[0081]
　Next, an example of setting the cross TTI by the RRC message will be described.
[0082]
　FIG. 5A is a diagram showing an example of exchanging RRC messages. In FIG. 5A, for example, the UE (User Equipment) corresponds to the terminal 200, and the Network corresponds to the base station 100.
[0083]
　The base station 100 transmits an RRC Reconfiguration message to the terminal 200 (S10). On the other hand, when the terminal 200 receives the RRC Reconfiguration message, it transmits the RRC Reconfiguration Complete message to the base station 100 (S11).
[0084]
　FIG. 5B is a diagram showing a configuration example of an RRC Reconfiguration message. The RRC Reconfiguration message contains various contents in a hierarchical structure, and some of them include PDSCH-Config and PUSCH-Config.
[0085]
　The PDSCH-Config is used, for example, to set UE-specific PDSCH parameters. In addition, PUSCH-Config is used, for example, to set PUSCH parameters for each UE. Details of the information element (IE: Information Element) contained in PDSCH-Config and PUSCH-Config are described in 3GPP TS 38.331 V15.1.0 (2018-03).
[0086]
　In the first embodiment, the base station 100 transmits the PDSCH-Config including IE for realizing the cross TTI.
[0087]
　FIG. 6 is a diagram showing an example of IE included in PDSCH-Config. As IE, (1) whether to perform cross TTI, (2) slot number to transmit the untransmitted part, (3) symbol number to start transmission, (4) end symbol of the slot next to the first slot are Further, whether or not to shift in the next slot is included.
[0088]
　“Whether or not to perform cross TTI” in (1) indicates, for example, whether or not to transmit data across TTIs (or by using a plurality of TTIs), and can be expressed by one bit.
[0089]
　The "slot number for transmitting the untransmitted portion" in (2) represents, for example, the slot number of the slot used for the transmission when the PDSCH of the untransmitted portion is transmitted by cross TTI. In the example of FIG. 4B, the untransmitted portion of TB # a (data for the remaining 4 symbols) is transmitted in the slot next to the first slot. Therefore, assuming that the slot number of the first slot is "0", The "slot number for transmitting the untransmitted portion" is "1".
[0090]
　The “symbol number for starting transmission” in (3) represents, for example, the symbol number of the symbol for starting transmission in the slot of the slot number for transmitting the untransmitted portion in (2). For example, in the example of FIG. 4B, since transmission is started from the 11th symbol, the symbol number for starting transmission is “10”.
[0091]
　The symbol number for starting the transmission in (3) is divided into cases as shown in FIG. This is because, for example, when the base station 100 performs carrier sense, the timing at which transmission can be started may not be known unless it is actually performed. In the terminal 200, as described above, the PDSCH of the untransmitted portion can be interpreted as "untransmitted" from the start symbol S, the length L, the actually received data, and the like, and further, the data for several symbols. It is possible to grasp whether there is a shortage. Then, the terminal 200 has its symbol in the slot according to (2) "slot number for transmitting untransmitted portion" and (3) "symbol number for starting transmission" included in PDSCH-Config. It is possible to receive the data of the untransmitted part from.
[0092]
　“Whether or not the end symbol of the slot next to the first slot is further shifted to the next slot” in (4) represents, for example, the following. That is, the base station 100 transmits the untransmitted portion in the next slot (or TTI) at the beginning by the cross TTI. However, this reduces the number of symbols to which the data to be transmitted is assigned in the next slot at the beginning, and the base station 100 cannot transmit this data. In the example of FIG. 4B, the data of TB # b assigned to all the symbols of the slot next to the first slot cannot be transmitted due to the cross TTI of TB # a. Therefore, according to (4), an IE indicating whether or not to shift to the next slot is further added to the PDSCH-Config. In the example of FIG. 4B, the end symbol of the untransmitted portion of TB # b is not further shifted to the next slot (third slot from the beginning). In this case, "whether or not the end symbol of the slot next to the first slot is further shifted to the next slot" is "0" (= not shifted). When shifting, for example, this IE is "1".
[0093]
　It should be noted that the example of the case classification of the "symbol number for starting transmission" shown in FIG. 6 (3) is an example. As a case classification, for example, when one symbol is insufficient, the "symbol number to start transmission" may be "1", and when two symbols are insufficient, it may be "2".
[0094]
　<4.2 When the cross TTI is set by the RRC message when the PUSCH shifts>
　FIGS. 7 (A) and 7 (B) are diagrams showing an example of PUSCH transmission.
[0095]
　As shown in FIG. 7A, the base station 100 allocates TB # a to all the symbols of the first slot in the upstream direction and assigns TB # b to all the symbols of the next slot by scheduling. The allocation result is being sent.
[0096]
　In the example of FIG. 7A, the terminal 200 performs carrier sense in the unlicensed band and confirms the “idol” state at the time of the first symbol of the first slot, so that the PDCCH is in order from the first symbol. According to, PUSCH (TB # a) is transmitted. Then, the terminal 200 also transmits PUSCH (TB # b) in order from the first symbol in the next slot.
[0097]
　On the other hand, in the example of FIG. 7B, the terminal 200 performs carrier sense in the unlicensed band and confirms that it is in the “Busy” state at the time of the first symbol of the first slot. Therefore, after the lapse of a predetermined period, the terminal 200 performs carrier sense again in the unlicensed band, and confirms that the terminal 200 is in the "Busy" state even at the time of the third symbol. Further, after the lapse of a predetermined period, the terminal 200 performs carrier sense again in the unlicensed band, and this time, confirms the "Idle" state. The terminal 200 transmits PUSCH (TB # a) when the start time of the fifth symbol becomes the transmission start timing. The terminal 200 shifts the transmission start timing of TB # a and transmits the TB # a.
[0098]
　In this case, for TB # a, the terminal 200 transmits the data assigned to the 10 symbols from the 5th symbol to the 14th symbol of the first slot in the first slot. Therefore, the terminal 200 cannot transmit the remaining 4 symbols of TB # a assigned to the 11th to 14th symbols among the TB # a assigned to all the symbols in the first slot in the first slot. ..
[0099]
　Therefore, the terminal 200 uses the cross TTI to transmit TB # a for the remaining 4 symbols. That is, in the example of FIG. 7B, the terminal 200 uses the first four symbols (first to fourth symbols) of the next slot to perform TB # a for the remaining four symbols that have not been transmitted. Send.
[0100]
　Then, the base station 100 can grasp that there is a shortage of PUSCH based on the start symbol S and the length L, similarly to the terminal 200 in the downlink direction. For example, in the example of FIG. 7B, the base station 100 receives only 10 symbols of data received from the terminal 200 even though S = 0 and L = 14 are transmitted by PUCCH. If it is detected that it does not, it can be grasped that there is a shortage of PUSCH. In this case, the base station 100 interprets the shortage PUSCH as "not transmitted".
[0101]
　Next, an example of setting the cross TTI by the RRC message will be described.
[0102]
　FIG. 6 shows an example of the IE of PUSCH-Config included in the RRC Reconfiguration message. As for PUSCH-Config, like PDSCH-Config, each IE is specified in 3GPP TS 38.3GPP TS 38.331 V15.1.0 (2018-03). In the first embodiment, the IE shown in FIG. 6 is further included in the PUSCH-Config in order to set the cross TTI.
[0103]
　As shown in FIG. 6, the IE is the same as the IE of PDSCH-Config, and the content thereof is also the same.
[0104]
　For example, in the example of FIG. 7B, "whether or not to perform cross TTI" in (1) is "1" (= cross TTI is performed), and "transmission slot number of untransmitted portion" in (2) is It becomes "1" (when the first slot is "0", the next slot). Further, the "symbol number for starting transmission" in (3) is "0", and the "shift to the next slot" in (4) is "1" (= shift).
[0105]
　As shown in FIG. 5A, the terminal 200 receives the RRC Configuration message from the base station 100 (S10, S11). Then, the RRC Reconfiguration message includes IE regarding cross TTI, as shown in FIG. According to this IE, the terminal 200 transmits data for the remaining four symbols of TB # a using the first to fourth symbols of the slot next to the first slot, as shown in FIG. 7 (B). .. In this case, regarding the data of TB # b, the data assigned to the 11th to 14th symbols is "not transmitted". The terminal 200 shifts the data of the “untransmitted” portion to the next slot (the slot next to the first slot) according to (4) of IE shown in FIG. 6, and transmits the data by cross TTI.
[0106]
　Note that FIGS. 29 (A) and 29 (B) show an example in which PUCCH and PUSCH are transmitted. 29 (A) and 29 (B) show examples in which PUCCH is added to the examples of FIGS. 7 (A) and 7 (B), respectively. The PUCCH may or may not be added to the PUSCH by, for example, DCI.
[0107]
　The transmission examples of FIGS. 29 (A) and 29 (B) can be carried out, respectively, as in the case of FIGS. 7 (A) and 7 (B), for example. In this case, as shown in FIG. 29 (B), the terminal 200 sets the fifth symbol as the transmission start timing, and transmits the PUCCH and the PUSCH by shifting them in the time direction as compared with the case of FIG. 29 (A). Will be done.
[0108]
　<4.3 When the cross TTI is set by the PDCCH when the PDCCH and the PDSCH are shifted>
　FIGS. 8 (A) and 8 (B) are diagrams showing a transmission example of the PDCCH and the PDSCH.
[0109]
　In the example of FIG. 8A, since the base station 100 was in the “Idle” state of the unlicensed band at the time of the first symbol of one slot, TB # a assigned to all the symbols of the first symbol was sequentially assigned. Send. Further, the base station 100 also transmits TB # b assigned to all the symbols in order in the slot next to the first slot.
[0110]
　On the other hand, in the example of FIG. 8B, the base station 100 suspends the transmission of Tb # a because it was in the “Busy” state at the time of the first symbol and the third symbol of the first slot. Since the base station 100 is in the "idol" state at the time of the fifth symbol, the transmission of TB # a is started. In this case, the base station 100 could not transmit the last four symbols of the TB # a transmitted in the first slot in the first slot. Therefore, the base station 100 uses the fifth to eighth symbols in the next slot (or TTI) by the cross TTI for the remaining four symbols of TB # a that are "untransmitted". You are sending data.
[0111]
　In this example, the cross TTI is set by PDCCH.
[0112]
　FIG. 9 is a diagram showing an example of a region (field) included in DCI transmitted using PDCCH.
[0113]
　As shown in FIG. 9, the DCI includes a TDRA (Time Domain Resource Assignment), an NDI (New Data Indicator), and a HARQ (Hybrid Automatic Repeat reQuest) process number (HARQ Process number). In addition, the new PDCCH includes RV (Redundancy Version), MCS (Modulation and Coding Scheme), and FDRA (Frequency Domain Resource Assignment).
[0114]
　The TDRA represents, for example, a resource designation in the time direction and includes a start symbol S and a length L in the slot. Similar to <4.1> above, the start symbol S is defined as, for example, a symbol that can actually start transmission of a transmission burst. Further, when there are a plurality of transmission opportunities, the base station 100 sets the start symbol S and the length L to the same value.
[0115]
　FIG. 10 (A) is a diagram showing an example of DCI included in PDCCH # m in the examples of FIGS. 8 (A) and 8 (B). As shown in FIG. 10 (A), the start symbol S and the length L included in the PDCCH # m of FIG. 8 (A) and the start symbol S and the length L included in the PDCCH # m of FIG. 8 (B). Both are S = 0 and L = 14.
[0116]
　Returning to FIG. 9, the NDI is used, for example, in the same retransmission process (HARQ) as the current NDI to identify whether it is retransmission data or new data by comparison with the previous NDI.
[0117]
　FIG. 11 is a diagram showing an example of using NDI.
[0118]
　Focusing on TB # a, the base station 100 initially transmits "0" as NDI, and since NACK is returned from the terminal 200, TB # a is retransmitted. In this case, the base station 100 transmits "0" represented as NDI again without toggle (or bit inversion). Since the NDI bit is not tagged, the terminal 200 can recognize that the received TB # a is the retransmission data.
[0119]
　Then, when the terminal 200 returns the ACK because the TB # a is normally received, the base station 100 transmits TB # a'different from the TB # a as new data. In this case, the base station 100 toggles the NDI bit “0” and transmits “1”. Since the terminal 200 has received "1" as the NDI, it can recognize that TB # a'is new data.
[0120]
　Returning to FIG. 9, the HARQ process number represents, for example, the identification number of the buffer for each TB that stores the TB. For example, in the same retransmission process, if the HARQ process numbers are the same, they represent the same TB, and if they are different, they represent different TBs.
[0121]
　RV represents, for example, a version of the coded data. By changing the version of the coded data for each retransmission, the coded gain on the receiving side can be improved. When transmitting the retransmission data in the same retransmission process, the base station 100 can improve the coding gain for the retransmission data in the terminal 200 by transmitting an RV different from the previously transmitted RV. ..
[0122]
　In this first embodiment, a new PDCCH (PDCCH # n in the example of FIG. 8B) is used for setting the cross TTI, and the “untransmitted” portion of the PDSCH by NDI, HARQ process number, and RV. Is meant to be sent.
[0123]
　FIG. 10 (B) is an example of FIG. 8 (B) and is a diagram showing an example of DCI included in PDCCH # n, which is a new PDCCH. In the example of FIG. 8B, TB # a for the remaining 4 symbols is used as the transmission start symbol in the slot next to the first slot, and the length thereof is 4 symbols. The TDRA of PDCCH # n shown in 10 (B) is S = 4, L = 4.
[0124]
　As shown in FIG. 10B, the NDI contained in PDCCH # n and the NDI contained in PDCCH # m shown in FIG. 10A are the same “0”. Further, the HARQ process number included in PDCCH # n and the HARQ process number included in PDCCH # m are the same “5”.
[0125]
　As shown in FIGS. 10A and 10B, since the HARQ process numbers of PDCCH # n and PDCCH # m are the same, the same TB (TB # a) is transmitted in the same retransmission process. It shows that it is. Further, although the NDIs of PDCCH # n and PDCCH # m are the same, the RVs of PDCCH # n and PDCCH # m are both the same, so that it is not a retransmission, for example.
[0126]
　That is, by making the NDI, HARQ process number, and RV of PDCCN # n and PDCCH # m the same, it is possible to represent the transmission of the "untransmitted" portion of the same PDSCH.
[0127]
　In the first embodiment, the transmission of the "untransmitted" portion is represented by DCI by changing the usage method without changing the definitions of NDI, HARQ process number, and RV in this way. Is possible.
[0128]
　In the examples of FIGS. 8A and 8B, the DCI of PDCCH # m1 instructing the transmission of TB # b is represented by, for example, FIG. 10C. As shown in FIG. 10 (C), the HARQ process number is different compared to PDCCH # m (FIG. 10 (A)) transmitted in the first slot. Therefore, it indicates that the base station 100 is transmitting a TB (TB # b in FIG. 8A) that is different from the TB transmitted in the first slot (TB # a in FIG. 8A).
[0129]
　The three transmission examples have been described above.
[0130]
　<5. Others>
　Next, other examples will be described.
[0131]
　<5.1 Example of Notifying Ending Symbol>
　Next, an example of notifying Ending Symbol will be described.
[0132]
　FIG. 12A is a diagram showing a transmission example of PDCCH and PDSCH.
[0133]
　In FIG. 12A, since the first symbol of the first slot was in the “idol” state, TB # a is transmitted using four symbols from the beginning, and TB # b is transmitted using the fifth and subsequent symbols. It shows an example. FIG. 12A shows an example of a mini slot specified in 5G.
[0134]
　The TDRA of PDCCH # n has, for example, a start symbol S = 0 and a length L = 7, and the TDRA of PDCCH # m1 has, for example, a start symbol S = 0 and a length = 14.
[0135]
　In FIG. 12B, since the unlicensed band was in the “Busy” state at the time of the first symbol and the third symbol of the first slot, the transmission was postponed, and at the time of the fifth symbol, “Idle”. It shows an example of the state. Therefore, the base station 100 transmits PDCCH # n, PDCCH # n1, and TB # a with the fifth symbol as the transmission start position.
[0136]
　In this case, TB # a assigned to the 7th symbol from the 1st symbol of the first slot is transmitted with data for 3 symbols which is a part of the TB # a in the first slot. Therefore, the data for the four symbols of TB # a assigned to the fourth to seventh symbols of TB # a cannot be transmitted using the fifth to seventh symbols of the first slot.
[0137]
　In such a case, the 8th to 11th symbols in the first slot are used for transmitting data for 4 symbols of TB # a, which is the "untransmitted" part, or are instructed by PDCCH # m1. As it was done, it is not possible to know whether it will be used for TB # b transmission. Moreover, in PDCCH # n, the start symbol S = 0 and the length L = 7, in PDCCH # m1, the start symbol S = 0 and the length L = 14, and in the base station 100 and the terminal 200, the start symbol is It is not possible to grasp how to handle such a case only by S and the length L.
[0138]
　Therefore, in the first embodiment, the Ending Symbol is newly defined. The Ending Symbol represents, for example, the end symbol in the slot. However, the Ending Symbol is counted in order from the beginning, for example, with the symbol at the beginning of the slot as "0".
[0139]
　For example, when Ending Symbol = 6, it means that the transmission of the PDSCH is terminated by the 7th symbol counting from the 1st symbol at the beginning of the slot. In the example of FIG. 12B, when Ending Symbol = 6 with respect to TB # a, the data of TB # a is transmitted by the 7th symbol of the first slot. Therefore, in the example of FIG. 12B, the 8th to 14th symbols are used for the transmission of TB # b. On the other hand, in the example of FIG. 12B, when Ending Symbol = 13, the "untransmitted" data of TB # a indicates that the transmission is terminated by the 8th to 14th symbols of the first slot. There is. Therefore, in the example of FIG. 12B, the untransmitted data of TB # a is represented to be transmitted using the 8th to 14th symbols of the first slot. In the example of FIG. 12B, the untransmitted data of TB # a is transmitted using the 8th to 11th symbols.
[0140]
　The Ending Symbol sets, for example, "6" when S <6 and "13" in other cases, so that whether or not the data in the "untransmitted" part is shifted to another TTI and transmitted is determined. It can be said that it represents.
[0141]
　This Ending Symbol may also be set by the RRC Reconfiguration message or by the PDCCH.
[0142]
　FIG. 13 shows an example of setting the Ending Symbol by the RRC message.
[0143]
　As shown in FIG. 13, the PDCH-Config included in the RRC Reconfiguration message newly includes the IE of "Ending Symbol". The base station 100 inserts an end symbol into this IE and transmits it to the terminal 200 (for example, FIG. 5A).
[0144]
　In the example shown in FIG. 13, when the start symbol S <6, Ending Symbol = 6 is set, and when the start symbol S <6, Ending Symbol = 13 is set. That is, when the start symbol S becomes the first to seventh symbols by the carrier sense, it means that the transmission of TB # a assigned to these symbols is terminated by the seventh symbol. Further, when the start symbol S becomes the 8th to 14th symbols due to the carrier sense, it indicates that the transmission of TB # a is terminated by the 14th symbol.
[0145]
　FIG. 14 shows an example of setting the Ending Symbol by PDCCH.
[0146]
　As shown in FIG. 14, a region of "Ending Symbol" is newly included, and the base station 100 inserts an end symbol in this region and transmits PDCCH. In this case, since the length L included in the TDRA can be calculated as L = ES + 1, it is not necessary to include the length L in the TDRA. Further, the information of "Ending Symbol" may be included in the area of ​​TDRA.
[0147]
　As shown in FIG. 12C, PDCCH may be assigned to the 8th to 10th symbols of the first slot. In this case, whether or not the base station 100 receives the data for four symbols of TB # a "not transmitted" by the PDCCH in the 8th to 14th symbols (or whether or not the shift is allowed). ) May be transmitted, including information that determines. Alternatively, the base station 100 may insert such information into the PDSDH-Config and set it with an RRC message.
[0148]
　The Ending Symbol can also be used in the transmission of PUCCH and PUSCH. In this case, the base station 100 can set the Ending Symbol by using, for example, the PUSCH-Config shown in FIG.
[0149]
　<5.2 Example when PDSCH cannot be mapped to the mapping area of ​​PDCCH> In
　5G, for example, it is possible to transmit PDCCH using a certain symbol and transmit PDSCH using that symbol. Alternatively, for example, the PDSCH can be mapped and transmitted to the symbol to which the PDCCH is mapped.
[0150]
　15 (A) and 15 (B) show an example of transmission of PDCCH and PDSCH.
[0151]
　FIG. 15A shows an example in which the base station 100 transmits PDCCH # m and TB # a in the first slot and transmits PDCCH # m1 and TB # b in the next slot.
[0152]
　On the other hand, in FIG. 15B, in the first slot, transmission starts from the fifth symbol, and TB # a uses the first slot (or the first TTI) and the next slot (or the next TTI) by the cross TTI. It shows an example of being sent. In this case, the base station 100 assigns two PDCCH # m1 and PDCCH # n to the first and second symbols of the slot next to the first slot, and further assigns PDSCH to these two symbols.
[0153]
　In this case, in the area of ​​these two symbols, the area of ​​the radio resource to which the PDCCH is assigned may include the area of ​​the radio resource to which the PDCCH (PDCCH # m1 and PDCCH # n) is assigned.
[0154]
　In the first embodiment, the base station 100 punctures the coding bits that were intended to be mapped to the PDCCH region in the PDSCH including the PDCCH region. That is, when the PDCCH is included in the area of ​​the PDSCH, the base station 100 preferentially transmits the PDCCH over the PDSCH. Further, the base station 100 prevents (or punctures) the coded bit in the area of ​​the radio resource in which the PDCCH and the PDSCH overlap. As a result, for example, the receiving terminal 200 can avoid receiving the data and the control signal at the same timing using the same frequency, and can normally receive the data and the control signal. It will be possible.
[0155]
　<6. Configuration example of base station and terminal>
　FIG. 16A is a diagram showing a configuration example of base station 100. The base station 100 includes a transmission line interface 110, a baseband signal processing unit 120, an RF (Radio Frequency) transmission / reception unit (or transmission unit or reception unit) 130, and an antenna 140. The base station 100 may be, for example, a gNB (Next generation Node B) defined by 5G.
[0156]
　The transmission line interface 110 receives packet data transmitted from a host station or another base station, and extracts data or the like from the received packet data. The transmission line interface 110 outputs the extracted data to the baseband signal processing unit 120. Further, the transmission line interface 110 inputs data output from the baseband signal processing unit 120, generates packet data including the input data, and transmits the generated packet data to a higher-level station or another base station. To do.
[0157]
　The baseband signal processing unit 120 processes, for example, data in the baseband band.
[0158]
　FIG. 16B is a diagram showing a configuration example of the baseband signal processing unit 120. The baseband signal processing unit 120 includes a reception signal processing unit 121, a control unit 122, a PDCCH generation unit 123, a PDSCH generation unit 124, and a mapping unit 125.
[0159]
　The reception signal processing unit 121 may, for example, receive data (PUSCH) or control transmitted from a terminal 200 from a baseband signal output from the RF transmission / reception unit 130 according to an uplink scheduling result output from the control unit 122. The signal (PUCCH) and the like are extracted. The reception signal processing unit 121 outputs the extracted data, the control signal, and the like to the control unit 122.
[0160]
　For example, the control unit 122 performs scheduling when performing wireless communication with the terminal 200, and outputs the scheduling result to the PDCCH generation unit 123. In this case, the scheduling result output to the PDCCH generation unit 123 includes each scheduling result in the down direction and the up direction. The control unit 122 outputs the downlink scheduling result to the mapping unit 125 and the uplink scheduling result to the reception signal processing unit 121.
[0161]
　Further, the control unit 122 outputs the data output from the transmission line interface 110 to the PDSCH generation unit 124.
[0162]
　Further, the control unit 122 generates an RRC message and outputs the generated RRC message to the PDSCH generation unit 124. The RRC message includes, for example, an RRC Configuration message, and also includes PDSCH-Config and PUSCH-Config shown in FIGS. 6 and 13.
[0163]
　The PDCCH generation unit 123 generates a DCI including the scheduling result with respect to the scheduling result output from the control unit 122. The PDCCH generation unit 123 generates, for example, the DCI shown in FIGS. 9 and 14. However, the information included in each IE of the DCI may be generated by, for example, the control unit 122. In this case, the PDCCH generation unit 123 collectively collects the information of one DCI shown in FIGS. 9 and 14. DCI may be generated to be in the form. The PDCCH generation unit 123 outputs the generated DCI to the mapping unit 125.
[0164]
　The PDSCH generation unit 124 outputs the data output from the control unit 122 to the mapping unit 125. In this case, the PDSCH generation unit 124 may output this data as PDSCH, for example. Further, the PDSCH generation unit 124 outputs the RRC message output from the control unit 122 to the mapping unit 125.
[0165]
　The mapping unit 125 puts the control signal output from the PDCCH generation unit 123 and the data output from the PDSCH generation unit 124 into a predetermined area on the radio resource according to the downlink scheduling result output from the control unit 122. Map. The mapping unit 125 outputs the mapped control signal and data to the RF transmission / reception unit 130.
[0166]
　Further, the mapping unit 125 maps the RRC message output from the PDSCH generation unit 124 to a predetermined area on the radio resource, and outputs the mapped RRC message to the RF transmission / reception unit 130, for example.
[0167]
　Returning to FIG. 16A, the RF transmission / reception unit 130 frequency-converts the control signal and data output from the baseband signal processing unit 120 and the RRC message into a radio signal in the radio band, and after frequency conversion. The radio signal is output to the antenna 140.
[0168]
　Further, the RF transmission / reception unit 130 performs frequency conversion of the radio signal output from the antenna 140 into a baseband signal of the baseband band, and outputs the baseband signal after frequency conversion to the baseband signal processing unit 120.
[0169]
　The antenna 140 transmits the radio signal output from the RF transmission / reception unit 130 to the terminal 200. Further, the antenna 140 receives the radio signal transmitted from the terminal 200 and outputs the received radio signal to the RF transmission / reception unit 130.
[0170]
　FIG. 17A is a diagram showing a configuration example of the terminal 200.
[0171]
　The terminal 200 includes an antenna 210, an RF transmission / reception unit (or transmission unit or reception unit) 220, a baseband signal processing unit 230, and an application unit 240.
[0172]
　The antenna 210 receives the radio signal transmitted from the base station 100, and outputs the received radio signal to the RF transmission / reception unit 220. Further, the antenna 210 transmits the radio signal output from the RF transmission / reception unit 220 to the base station 100.
[0173]
　The RF transmission / reception unit 220 performs frequency conversion on the radio signal output from the antenna 210, converts it into a baseband band signal, and outputs the converted baseband signal to the baseband signal processing unit 230. Further, the RF transmission / reception unit 220 frequency-converts the baseband signal output from the baseband signal processing unit 230 into a radio signal in the radio band, and outputs the converted radio signal to the antenna 210.
[0174]
　The baseband signal processing unit 230 performs processing on the baseband signal, for example.
[0175]
　FIG. 17B is a diagram showing a configuration example of the baseband signal processing unit 230.
[0176]
　The baseband signal processing unit 230 includes a PDCCH reception processing unit 231, a PDSCH reception processing unit 232, a control unit 234, a PUSCH generation unit 235, a PUCCH generation unit 236, and a mapping unit 237.
[0177]
　The PDCCH reception processing unit 231 extracts a control signal from the baseband signal output from the RF transmission / reception unit 220. Of the extracted control signals, the PDCCH reception processing unit 231 outputs the downlink scheduling result to the PDSCH reception processing unit 232, and outputs the uplink scheduling result to the control unit 234.
[0178]
　The PDSCH reception processing unit 232 extracts data and RRC messages assigned to its own station from the baseband signal output from the RF transmission / reception unit 220 according to the downlink scheduling result output from the PDCCH reception processing unit 231.
[0179]
　At this time, the PDSCH reception processing unit 232 confirms whether or not the data is received according to, for example, the start symbol S and the length L included in the DCI, or the Ending Symbol instead of the length L. Further, the PDSCH reception processing unit 232 confirms whether or not the cross TTI is set by the PDCCH based on, for example, the NDI and HARQ process numbers included in the DCI and the RV (for example, FIG. 9). In this case, when the cross TTI is set by the PDCCH, the PDSCH reception processing unit 232 sets the cross TTI based on the start symbol S, the length L, the Ending Symbol, the NDI, the HARQ process number, the RV, and the like. The data is extracted from the baseband signal. The processing for the cross TTI set by the PDCCH may be performed by the PDSCH reception processing unit 232 instead of the control unit 234.
[0180]
　Further, for example, when the cross TTI is set by the RRC message, the PDSCH reception processing unit 232 basebands the continuation part of the PDSCH according to the PDSCH-Config (for example, FIG. 6) included in the extracted RRC message. Extract from the signal.
[0181]
　The PDSCH reception processing unit 232 outputs the extracted data and the RRC message to the control unit 234.
[0182]
　The control unit 234 performs reception processing and transmission processing according to, for example, an RRC message output from the PDSCH reception processing unit 232.
[0183]
　Further, the control unit 234 outputs the data output from the PDSCH reception processing unit 232 to the application unit 240.
[0184]
　Further, the control unit 234 outputs the uplink scheduling result output from the PDCCH reception processing unit 231 to the mapping unit 237.
[0185]
　Further, the control unit 234 outputs the data output from the application unit 240 to the PUSCH generation unit 235. Further, the control unit 234 generates an upstream control signal and outputs the generated control signal to the PUCCH generation unit 236.
[0186]
　The PUSCH generation unit 235 outputs the data output from the control unit 234 to the mapping unit 237.
[0187]
　The PUCCH generation unit 236 outputs the control signal output from the control unit 234 to the mapping unit 237.
[0188]
　The mapping unit 237 maps the data and the control signal to the radio resource according to the uplink scheduling result output from the control unit 234. The mapping unit 237 outputs the mapped data and the control signal to the RF transmission / reception unit 220 as a baseband signal.
[0189]
　Returning to FIG. 17A, the application unit 240 performs processing related to the application on the data output from the baseband signal processing unit 230, for example. Further, the application unit 240 performs, for example, processing related to the application to generate data, and outputs the generated data to the control unit 234.
[0190]
　<7. Operation example>
　Next, an operation example will be described. As the operation example, the operation example of <4.1> described above will be described first. Next, an operation example of <4.2> described above will be described. Finally, an operation example of <4.3> will be described.
[0191]
　<7.1 Operation example when cross TTI is set by RRC message when shifting between PDCCH and PDSCH>
　FIG. 18 shows a case where cross TTI is set by RRC message when shifting between PDCCH and PDSCH. It is a flowchart which shows the operation example in the base station 100 of.
[0192]
　The base station 100 and the terminal 200 have completed the exchange of RRC messages by, for example, the sequence shown in FIG. 5 (A), and the PDSCH-Config shown in FIG. 6 is held by the base station 100 and the terminal 200. It shall be. For example, the control unit 122 generates the PDSCH-Config shown in FIG. 6, and transmits the generated PDSCH-Config to the terminal 200 via the PDSCH generation unit 124.
[0193]
　As shown in FIG. 18, when the base station 100 starts processing (S20), it executes LBT (S21). For example, the base station 100 performs the following processing.
[0194]
　That is, the received signal processing unit 121 measures the strength of the received signal in a predetermined frequency band of the unlicensed frequency band, and outputs the result to the control unit 122. When the result is smaller than the threshold value, the control unit 122 determines the "Idle" state, and when the result is equal to or higher than the threshold value, the control unit 122 determines the "Busy" state.
[0195]
　Next, the base station 100 determines whether or not the predetermined frequency band of the unlicensed frequency band is in the “Idle” state (S22). When the base station 100 is in the “Busy” state (No in S22), after a predetermined period of time elapses, the base station 100 executes LBT again (S21), and repeatedly executes the LBT until the predetermined frequency band is in the “Idle” state (No in S22). Loop).
[0196]
　When the predetermined frequency band is in the “idol state” (Yes in S22), the base station 100 transmits the PDCCH and the PDSCH using the predetermined frequency band (S23). For example, the base station 100 performs the following processing.
[0197]
　That is, when the control unit 122 determines that it is in the "idol" state, it instructs the mapping unit 125 to output the signal of the head slot (or head TTI). The control unit 122 detects that there is data to be transmitted and instructs the generation of the signal of the first slot before starting the LBT. First, the data received from the transmission line interface 110 is output to the PDSCH generation unit 124. At that time, the control unit 122 performs scheduling and outputs the result to the PDCCH generation unit 123. The PDCCH generation unit 123 outputs DCI to the mapping unit 125, the PDSCH generation unit 124 outputs data to the mapping unit 125, and the mapping unit 125 maps DCI and data on the radio resource according to the downlink scheduling result. To do. The mapping unit 125 transmits the mapped DCI and data to the terminal 200 via the RF transmission / reception unit 130.
[0198]
　However, as shown in FIG. 4B, for example, when the base station 100 is in the “Idle” state after the “Busy” state, the base station 100 shifts the symbols including the PDCCH and the PDSCU until the “Idle” state is reached. Let me. Further, the base station 100 transmits the portion of the PDSCH that could not be transmitted in the first slot (or the first TTI) in the next slot (or the next TTI) by using the cross TTI. For example, the base station 100 performs the following processing.
[0199]
　That is, the control unit 122 instructs the mapping unit 125 not to transmit the PDCCH and the PDSCH when the signal strength in the predetermined frequency band is equal to or higher than the threshold value, and the mapping unit 125 stops the transmission of the mapped PDCCH and the PDSCH. To do. Meanwhile, the mapping unit 125 may store the PDCCH and the PDSCH in the internal memory. After that, when the signal strength becomes smaller than the threshold value, the control unit 122 confirms that the unlicense frequency band is not used by another device. Then, in this case, the control unit 122 shifts the symbol including the PDCCH and the PDSCH in the downlink direction in the time direction until the transmission start timing in which the “Idle” state is set. The control unit 122 also shifts the PDCCH and PDSCH that follow in the time direction. In the example of FIG. 4B, the control unit 122 shifts by 4 symbols. The control unit 122 outputs the shift result to the mapping unit 125. The mapping unit 125 reads the mapped PDCCH and PDSCH from the internal memory according to the shift result, and outputs the mapped PDCCH and PDSCH to the RF transmission / reception unit 130. After the shift, the mapping unit 125 or the RF transmission / reception unit 130 transmits the control signal and the data to the terminal 200 by using the PDCCH and the PDSCH, respectively. Then, when performing cross TTI according to PDSCH-Config (for example, FIGS. 5A and 6), the control unit 122 sets the slot number for transmitting the untransmitted portion, the symbol number for starting transmission, and the like to the mapping unit 125. Output to. According to the instruction, the mapping unit 125 reads out the TB # a of the untransmitted portion stored in the internal memory or the like and transmits it at the specified symbol of the specified slot. This makes it possible to realize, for example, a cross TTI.
[0200]
　The control unit 122, for example, shifts the PDCCH and the PDSCH in the time direction, and transmits the start symbol S and the length L included in the PDCCH from the first symbol in the slot. Set S and length L to be the same.
[0201]
　Returning to FIG. 18, when the base station 100 ends the transmission of the PDCCH and the PDSCH, the base station 100 ends this process (S24).
[0202]
　FIG. 19 is a flowchart showing an example of processing on the terminal 200 side in this operation example.
[0203]
　When the terminal 200 starts the process (S30), the terminal 200 receives the PDCCH and the PDCCH portion in the slot including the PDCCH. For example, the PDCCH reception processing unit 231 receives the PDCCH, the PDSCH reception processing unit 232 receives the DCI from the PDCCH reception processing unit 231, and receives the PDSCH portion according to the DCI.
[0204]
　Next, the terminal 200 determines whether or not the length of the PDSCH actually received is shorter than the length of the PDSCH indicated by DCI (S32). The DCI includes a start symbol S and a length L, as described above. For example, the terminal 200 performs the following processing.
[0205]
　That is, the control unit 234 receives the data output from the PDSCH reception processing unit 232, counts the amount of the data, and calculates the length of the PDSCH based on the counted data. Then, the control unit 234 determines whether or not the calculated length is shorter than the length L indicated by the DCI. Based on the DCI and the length of the PDSCH actually received, the control unit 234 confirms whether or not the PDCCH included in the first symbol and the PDSCH and after are shifted and transmitted at the base station 100.
[0206]
　When the length of the PDSCH actually received is shorter than the length of the PDSCH specified by DCI (Yes in S32), the terminal 200 determines whether or not the cross TTI setting is set in the RRC message (S33). ). For example, when the control unit 234 determines that the calculated length is shorter than the length L specified by the DCI, the presence / absence of the cross TTI setting in the RRC message received from the PDSCH reception processing unit 232 (for example, FIG. 6). Judgment is made by confirming (1)).
[0207]
　When the cross TTI is set (Yes in S33), the terminal 200 receives the continuation portion of the PDSCH according to the RRC setting (S34). For example, when the control unit 234 confirms the cross TTI setting, the control unit 234 receives the continuation portion of the PDSCH at the timing of the next TTI or the like according to the IE included in the PDSCH-Config (for example, FIG. 6).
[0208]
　Next, the terminal 200 feeds back ACK or NACK according to the reception result (S35). For example, when the control unit 234 can normally receive the PDSCH including the continuation portion of the PDSCH by the cross TTI, the control unit 234 generates an ACK and feeds back the ACK via the PUSCH generation unit 235 or the PUCCH generation unit 236. On the other hand, the control unit 234 generates NACK when the PDSCH including the PDSCH continuation portion cannot be normally received by, for example, the cross TTI, and feeds back the NACK via the PUSCH generation unit 235 or the PUCCH generation unit 236. ..
[0209]
　Then, the terminal 200 ends a series of processes (S36).
[0210]
　On the other hand, when the cross TTI is not set as the RRC setting (No in S33), the terminal 200 shifts to S35 without performing the cross TTI process. In this case, the terminal 200 feeds back ACK or NACK to the received PDSCH without performing cross TTI.
[0211]
　On the other hand, when the length of the PDSCH actually received is the same as the length of the PDSCH specified by DCI (No in S32), the terminal 200 shifts to S35. In this case, the terminal 200 has received the PDSCH of the length L specified by the DCI, and the situation is the same as that of FIG. 4A, for example. Therefore, the received PDSCH without performing the cross TTI process. ACK or NACK is fed back to the user.
[0212]
　<7.2 Operation example when cross TTI is set by RRC message when PUSCH shifts>
　FIG. 20 shows the operation on the terminal 200 side when cross TTI is set by RRC message when PUSCH shifts. It is a flowchart which shows an example. Also in this case, similarly to the above <7.1>, the base station 100 and the terminal 200 end the exchange of the RRC message (for example, FIG. 5A), and hold the PUSCH-Config (for example, FIG. 6) with each other. It is assumed that you are doing. For example, the control unit 122 generates the PUSCH-Config shown in FIG. 6 and transmits it to the terminal 200 via the PDSCH generation unit 124 or the like.
[0213]
　When the terminal 200 starts the process (S40), the terminal 200 executes the LBT (S41). For example, the terminal 200 performs the following processing.
[0214]
　That is, the PDCCH reception processing unit 231 or the PDSCH reception processing unit 232 measures the signal strength of the received signal in a predetermined frequency band of the unlicensed frequency band, and outputs the result to the control unit 234. The control unit 234 determines the "idol" state or the "busy" state based on the result, similarly to the control unit 122 of the base station 100.
[0215]
　When the predetermined frequency band is in the "Busy" state (No in S42), the terminal 200 executes LBT again after the elapse of the predetermined time (S41) and repeats until the predetermined frequency band is in the "Idle" state (No loop in S42). ..
[0216]
　When the predetermined frequency band is in the “idol” state (Yes in S42), the terminal 200 transmits the PUCCH and the PUSCH to the base station 100 using the predetermined frequency band (S43). The terminal 200 performs the following processing, for example.
[0217]
　That is, when the control unit 234 determines that it is in the "idol" state, it outputs the data received from the application unit 240 to the mapping unit 237 via the PUSCH generation unit 235. The control unit 234 outputs the uplink scheduling result received from the PDSCH reception processing unit 232 to the mapping unit 237, generates a control signal, and outputs the control signal to the mapping unit 237 via the PUCCH generation unit 236. The mapping unit 237 maps the control signal and the data on the radio resource according to the scheduling result in the upstream direction. The mapping unit 237 transmits the mapped control signal (PUCCH) and data (PUSCH) to the base station 100 via the RF transmission / reception unit 220.
[0218]
　However, as shown in FIG. 7B, for example, when the terminal 200 is in the “idol” state after the “busy” state, the terminal 200 shifts the symbols including the PUCCH and the PUSCH until the “idol” state is reached. .. Further, the terminal 200 transmits the portion of the PUSCH that could not be transmitted in the first slot (or the first TTI) in the next slot (or the next TTI) by using the cross TTI. For example, the terminal 200 performs the following processing.
[0219]
　That is, the control unit 234 instructs the mapping unit 237 not to transmit the PUCCH and the PUSCH when the signal strength in the predetermined frequency band is equal to or higher than the threshold value, and the mapping unit 237 stops the transmission of the mapped PUCCH and the PUSCH. .. In this case, the mapping unit 237 may store PUCCH and PUSCH in the internal memory. After that, the control unit 234 confirms that the unlicensed frequency band is not used for other devices when the signal strength becomes smaller than the threshold value. Then, the control unit 234 shifts the symbol including the PUCCH and the PUSCH in the upstream direction in the time direction until the transmission start timing in which the "idol" state is set. The control unit 234 also shifts the PUCCH and the PUSCH that follow in the time direction. In the example of FIG. 7B, the shift is performed by 4 symbols. The control unit 234 outputs the shift result to the mapping unit 237. The mapping unit 237 reads the PUCCH and the PUSCH from the internal memory according to the shift result, and outputs the PUCCH and the PUSCH to the RF transmission / reception unit 220. The mapping unit 237 or the RF transmission / reception unit 220 transmits the control signal and data assigned to the shifted symbol to the base station 100 by using the PUCCH and the PUSCH, respectively. Then, when performing cross TTI according to PUSCH-Config (for example, FIGS. 5A and 6), the control unit 234 maps the slot number for transmitting the untransmitted portion, the transmission start symbol number, and the like to the mapping unit. Output to 237. According to the instruction, the mapping unit 237 reads the untransmitted portion (for example, TB # a in FIG. 7A) stored in the internal memory or the like, and transmits using the instructed symbol of the instructed slot. .. This makes it possible to realize cross TTI, for example, in the upward direction.
[0220]
　Returning to FIG. 20, when the transmission of PUCCH and PUSCH is completed, the terminal 200 ends this process (S44).
[0221]
　When the terminal 200 does not transmit the PUCCH (for example, FIG. 7B), the process of S43 is a process of transmitting the PUSCH without transmitting the PUCCH.
[0222]
　FIG. 21 is a flowchart showing an example of processing on the base station 100 side in this operation example.
[0223]
　When the base station 100 starts processing (S50), it receives the PUCCH and the PUSCH portion in the slot containing the PUCCH (S51). For example, the reception signal processing unit 121 extracts PUCCH and PUSCH transmitted from the terminal 200 from the baseband signal according to the scheduling result in the upward direction output from the control unit 122, and controls the extracted PUCCH and PUSCH. Output to unit 122.
[0224]
　Next, the base station 100 determines whether or not the length of the PUSCH actually received is shorter than the length of the PUSCH specified by DCI (S52). For example, the base station 100 performs the following processing.
[0225]
　That is, the control unit 122 counts the data amount of the data received from the received signal processing unit 121, and calculates the length of the PUSCH based on the counted data amount. The control unit 122 confirms whether or not the PUSCH is started from the start symbol S and whether or not the calculated length is shorter than the length L based on the start symbol S and the length L included in the DCI. Similar to the control unit 122 of the terminal 200, the control unit 122 also shifts and transmits the PUCCH and the PDSCH after the first symbol in the terminal 200 based on the DCI and the length of the PUSCH actually received. I try to check if.
[0226]
　When the length of the PUSCH actually received is shorter than the length of the PUSCH specified by DCI (Yes in S52), the base station 100 determines whether or not the cross TTI is set in the RRC message (S53). .. For example, the control unit 122 determines by confirming the presence / absence of the cross TTI setting (for example, 1 in FIG. 6) in the RRC message generated by itself.
[0227]
　When the cross TTI is set (Yes in S53), the base station 100 receives the continuation portion of the PUSCH according to the RRC setting (S54). For example, when the control unit 122 confirms the cross TTI setting, the control unit 122 receives the continuation portion of the PUSCH at the next TTI or the like according to the IE included in the PUSCH-Config (for example, FIG. 6).
[0228]
　Next, the base station 100 instructs the PDCCH to retransmit or transmit new data according to the reception result (S55). For example, when the control unit 122 can normally receive the PUSCH including the continuation portion of the PUSCH by the cross TTI, the control unit 122 transmits the PDCCH instructing the transmission of new data to the terminal 200 via the PDCCH generation unit 123. On the other hand, when the PUSCH including the PUSCH continuation portion cannot be normally received by, for example, the cross TTI, the control unit 122 transmits the PDCCH instructing retransmission to the terminal 200 via the PDCCH generation unit 123.
[0229]
　Then, the base station 100 ends a series of processes (S56).
[0230]
　On the other hand, when the cross TTI is not set as the RRC setting (No in S53), the base station 100 shifts to S55 without performing the cross TTI process. In this case, the terminal 200 feeds back ACK or NACK to the received PUSCU without performing cross TTI.
[0231]
　On the other hand, when the length of the PUSCH actually received is the same as the length of the PUSCH specified by DCI (No in S52), the base station 100 shifts to S55. In this case, the base station 100 has received the PUSCH of length L specified by DCI, and the situation is the same as that of FIG. 7A, for example. Therefore, the received PUSCH without performing the cross TTI process. ACK or NACK is fed back to.
[0232]
　In addition, in FIG. 21, when the terminal 200 does not transmit the PUCCH, in the process of S51, the base station 100 receives the PUSCH without receiving the PUCCH.
[0233]
　<7.3 Operation example when cross TTI is set by PDCCH when PDCCH and PDSCH shift>
　FIG. 22 shows a base station when cross TTI is set by PDCCH when PDCCH and PDSCH shift. It is a flowchart which shows the operation example of 100 side.
[0234]
　Further, in performing this operation example, it is assumed that the base station 100 and the terminal 200 finish exchanging RRC messages (for example, FIG. 5A), and hold PDSCH-Configs in a memory or the like. However, it is assumed that (1) of FIG. 6 is set in PDSCH-Config, and (2) to (4) are not set. That is, it is assumed that the base station 100 and the terminal 200 share whether or not to perform cross TTI by exchanging RRC messages, and the details of cross TTI are set by PDCCH.
[0235]
　In the process shown in FIG. 22, S60 to S62 are the same as S20 to S22 shown in FIG. 18 of <7.1> described above.
[0236]
　The base station 100 transmits PDCCH and PDSCH when the unlicensed frequency band is in the “Idle” state (Yes in S62) (S23). Similar to the case of <7.1> described above, when the PDCCH and PDSCH are shifted in the first slot, the base station 100 performs the following processing, for example.
[0237]
　That is, the control unit 122 determines the TDRA, NDI, HARQ process number, RV, MCS, etc. shown in FIG. 9 when scheduling the first slot, and outputs the determined information to the PDCCH generation unit 123. The PDCCH generation unit 123 puts together these pieces of information to generate, for example, PDCCH # m shown in FIG. 10 (A). The PDCCH generation unit 123 transmits the generated PDCCH # m to the terminal 200 via the mapping unit 125. Further, the control unit 122 sets a cross TTI for the PDSCH that could not be transmitted in the first slot due to the shift of the symbol including the PDCCH (PDCCH # m in the example of FIG. 10A) and the PDSCH in the first slot. Therefore, a new PDCCH (PDCCH # n in the example of FIG. 10 (A)) is generated. The control unit 122 generates the NDI, the HARQ process number, and the same NDI, HARQ process number, and RV as the RV included in the PDCCH (PDCCH # m) of the first slot. The PDCCH generation unit 123 generates a PDCCH (PDCCH # n) for cross TTI setting including such information, and transmits the PDCCH (PDCCH # n) to the terminal 200 via the mapping unit 125 or the like. Note that PDCCH # m1 may be generated when PDCCH # m is generated. Further, the PDSCH transmission by the cross TTI is the same as in <7.1> described above.
[0238]
　FIG. 23 is a flowchart showing an operation example on the terminal 200 side when the cross TTI is set by the PDCCH when the PDCCH and the PDSCH shift.
[0239]
　In FIG. 23, S70 to S72 are the same as S30 to S32 in FIG. 19 described in <7.1> described above. However, in S72, the DCI used when determining whether or not the length of the PDSCH actually received is shorter than the length of the PDSCH specified by the DCI is, for example, the DCI included in the PDCCH of the first slot. , In the example of FIG. 8B, it corresponds to DCI included in PDCCH # m.
[0240]
　When the length of the PDSCH actually received is shorter than the length of the PDSCH specified by DCI (Yes in S72), the terminal 200 determines whether or not the cross TTI is set in the RRC setting (S73). .. For example, the terminal 200 performs the following processing.
[0241]
　That is, the control unit 234 calculates the length of the data from the amount of data output from the PDSCH reception processing unit 232, and determines that the length is shorter than the length L specified by the DCI. Then, the control unit 234 confirms the cross TTI setting ((1) in FIG. 6) in the PDSCH-Config included in the RRC message output from the PDSCH reception processing unit 232 to determine whether or not the cross TTI is set. judge.
[0242]
　When the cross TTI is set (Yes in S73), the terminal 200 receives a new PDCCH and receives a continuation of the PDSCH according to the resource allocation (S74). For example, the terminal 200 performs the following processing.
[0243]
　That is, the PDSCH reception processing unit 232 receives a new PDCCH from the PDCCH reception processing unit 231 and refers to each field shown in FIG. Then, the PDSCH reception processing unit 232 confirms the PDSCH of the "untransmitted" portion addressed to its own station according to the information shown in each field, and sets the PDSCH portion following the PDSCH assigned by the PDCCH of the previous TTI. Receive.
[0244]
　Next, the terminal 200 feeds back ACK or NACK according to the reception result (S75). For example, the control unit 234 determines whether or not the data received from the PDSCH reception processing unit 232 is normal, generates an ACK or NACK according to the determination result, and transmits the PUSCH generation unit 235 or the PUCCH generation unit 236. Feedback is given to the base station 100.
[0245]
　Then, the terminal 200 ends a series of processes (S76).
[0246]
　On the other hand, when the length of the PDSCH actually received is the same as the length of the PDSCH specified by DCI (No in S72), or when the RRC setting is set not to perform cross TTI (the terminal 200 is set to not perform cross TTI). In S73, the process proceeds to No) and S75, and the above-described processing is performed.
[0247]
　<8. About Search Space>
　A supplementary explanation will be given in the first embodiment.
[0248]
　In 5G, there is ControlResourceSet (CORESET) as an RRC message. CORESET is used, for example, to set time and frequency control resources to search for DCI. As IE included in CORESET, there is fractionyDomainResources. The frequencyDomainResources represents, for example, a frequency resource for DCI search.
[0249]
　Further, 5G has a Search Space as an RRC message. The SearchSpace represents, for example, how to search for a PDCCH candidate or where to search for a PDCCH candidate. Both CORESET and SearchSpace are, for example, information elements or messages contained in an RRC Configuration message.
[0250]
　FIG. 24A is a diagram showing, for example, a transmission example of PDCCH and PDSCH including a search space. The search space contains one or more PDCCHs. For example, the terminal 200 searches the area to which the PDCCH is allocated on the radio resource according to the SearchSpace which is an RRC message. In PDCCH, in addition to notifying individual terminals 200, there are also those that notify the system common or a plurality of terminals. For example, information about the format such as the length of the transmission burst and the length of the next slot, information about the uplink transmission section, and the slot number of the slot in which the PDCCH is located in the transmission burst (for example, the number is set with the first slot as 0). The terminal 200 also searches for PDCCH that transmits information common to the system such as (counting).
[0251]
　The SearchSpace includes the monitoringSlotPeriodicityAndOffset, the monitoringSymbolsWiththinSlot, and the duration IEs.
[0252]
　The monitoring SlotPeriodicityAndOffset is, for example, an IE indicating how many slots the search space is once in. For example, when the monitoring SlotPeriologicityAndOffset is "all slots", all slots include a search space.
[0253]
　monitoringSymbolsWithinSlot is, for example, an IE that represents a symbol in which PDCCH may be transmitted (or PDCCH can be transmitted) in a slot. The monitoringSymbolsWithinSlot is defined, for example, at an absolute position within a slot. For example, when monitoringSymbolsWithinSlot is "1000000000000000", PDCCH is assigned to the 1st symbol and the 8th symbol in the slot as shown in FIG. 24 (A).
[0254]
　The duration is, for example, an IE that represents the length in the time direction. For example, when the duration is "2", it means that the PDCCH has the length of the "2" symbol, as shown in FIG. 24 (A).
[0255]
　Regarding the search space area, for example, the monitoringSlotPeriologicityAndOffset, the monitoringSymbolsWithslot, and the duration IEs enable resource specification in the PDCCH time direction. Then, the terminal 200 that has received such an RRC message can monitor the area on the radio resource and receive the PDCCCH according to each of these IEs.
[0256]
　In the first embodiment, for example, as shown in FIG. 24 (B), a symbol including PDCCH and PDSCH can be shifted in the time direction depending on the result of carrier sense, whereby a plurality of symbols can be shifted in the time direction. There will be a transmission opportunity. In this case, the problem is how to define the time-wise resources of the search space. In particular, in monitoringSymbolsWithinSlot, for example, a symbol is defined at an absolute position in a slot, so how to handle it becomes a problem.
[0257]
　Here, focusing on the subsequent slots other than the first slot in FIG. 24B, the position of the search space is the same as the position of the search space in the license frequency band. Therefore, the search space in the slot following the unlicensed frequency band and the search space in the licensed frequency band can be monitored in common. On the other hand, the monitoring method for the search space of the first slot is performed by a method different from the monitoring method for the search space in the licensed frequency band.
[0258]
　Therefore, in the first embodiment, the search space monitoring method is defined by two options. The first option (Option1) defines two monitoringSymbolsWithinSlots, a trailing slot and a leading slot. The second option (Option 2) is a method in which the positioning SymbolsWithslot has the same definition in the succeeding slot and the head slot, and the interpretation and processing are changed in the terminal 200.
[0259]
　FIG. 25 is a diagram showing a definition example of two options (Option 1 and Option 2). In FIG. 25, for example, "slot after 2 slots of transmission burst" represents a succeeding slot (for example, a slot after the next slot from the first slot), and "slot other than the left" represents the first slot, respectively. The "slot other than the one on the left" includes, for example, a slot in a data untransmitted section before the first slot.
[0260]
　In the example shown in FIG. 25, in Option 1, the monitoringSymbolsWithinSlot is defined in a different manner from "1000000000000" in the subsequent slot and "10101010101010" in the first slot. That is, in Option 1, for example, the content included in the monitoringSymbolsWithinSlot is different between the "slot after 2 slots of the transmission burst" and the "slot other than the one on the left".
[0261]
　In this example, in the subsequent slot, the first symbol (first symbol) indicates that there is a search space. Therefore, the terminal 200 may search for the first slot in the slot for the succeeding slot.
[0262]
　Further, in the first slot, it is shown that the first symbol from the beginning (Symbol # 0), the third symbol (Symbol # 2), the fifth symbol (Symbol # 4), and the like are monitored 7 times every other symbol. .. Therefore, the terminal 200 may monitor the first slot seven times with the designated symbol.
[0263]
　In the case of Option 1, for example, in the RRC message, two definitions as shown in FIG. 25 are included for monitoringSymbolsWithslot, and the terminal 200 can perform such processing by receiving the RRC message.
[0264]
　On the other hand, in the example shown in FIG. 25, in Option 2, the monitoringSymbolsWithslot is "10000000000000" in both the succeeding slot and the leading slot. In this case, the terminal 200 interprets the parameters indicated by monitoringSymbolsWithslot as relative positions of each transmission opportunity from the actual transmission start symbol. For example, in the example of FIG. 24B, since transmission is actually started from the fifth symbol in the first slot, the terminal 200 has the fifth symbol as the first "1" th symbol in "10000000000000". Interpret as a symbol.
[0265]
　In Option 2 of FIG. 25, as in the case of Option 1, monitoringSymbolsWithinSlot is included in the RRC message, so that the terminal 200 can perform such processing by receiving the RRC message.
[0266]
　In Option 2, "Symbol # 0, # 2, # 4, # 6, # 8, # 10, # 12" may be set as the transmission start pattern by the RRC message.
[0267]
　FIG. 26 is a diagram showing an example of an RRC message including a transmission start pattern. The example shown in FIG. 26 is an example in which the IE of “PDCCH transmission possible timing” is included in PDSCH-Config. As a parameter to be set in "PDCCH transmission possible timing", for example, by setting "10101010101010", "Symbol # 0, # 2, # 4, # 6, # 8, # 10, # 12" of the first slot is transmitted. As an opportunity, the terminal 200 may monitor the PDCCH at this timing.
[0268]
　The "PDCCH transmission enable timing" may be included in the PDCCH-Config, or may be included in another Config or the like. The "PDCCH transmission enable timing" may be, for example, one included in the RRC Reconfiguration message.
[0269]
　For Option 1 and Option 2, for example, the control unit 122 of the base station 100 may generate an RRC message including monitoringSymbolsWithinSlot and transmit it to the terminal 200 via the PDSCH generation unit 124.
[0270]
　27 (A) and 27 (B) are diagrams showing a monitoring example of the terminal 200 when Option 1 and Option 2 shown in FIG. 25 are set.
[0271]
　As shown in FIG. 27 (A), in the non-transmission section, the terminal 200 monitors every other symbol from the first symbol in the slot by the monitoringSymbolsWithinSlot in Option1 and the RRC message in Option2, respectively.
[0272]
　Then, the terminal 200 monitors with the first symbol of the first slot of the transmission burst, receives the PDCCH, and then receives the PDSCH as well.
[0273]
　In the case of Option 1, the terminal 200 can receive the PDCCH by monitoring the first slot by monitoringSymbolsWithinSlot (= "10101010101010").
[0274]
　In the case of Option 2, the terminal 200 can receive the PDCCH by monitoring the first symbol according to the "transmission start timing" of the RRC message. In this case, the terminal 200 interprets "1" of "10000000000000" in monitoring SymbolsWithinSlot with the first symbol as the transmission start symbol.
[0275]
　In addition, after the second slot of the transmission burst, the terminal 200 may monitor the first slot in the slot as the succeeding slot for both Option 1 and Option 2.
[0276]
　On the other hand, in the example of FIG. 27 (B), the PDCCH and the PDSCH start to be received from the fifth symbol in the first slot of the transmission burst. In Option 1, the terminal 200 receives PDCCH from the fifth symbol by monitoring every other symbol from the first symbol by monitoring SymbolsWithinSlot. In Option 2, the terminal 200 monitors every other symbol from the first symbol according to the "transmission start timing" of the RRC message, and receives the PDCCH from the fifth symbol. At this time, the terminal 200 interprets the fifth symbol (symbol 4) as "1" of "10000000000000" of monitoringSymbolsWithinSlot.
[0277]
　[Other Embodiment]
　FIG. 28A is a diagram showing a hardware configuration example of the base station 100.
[0278]
　The base station 100 includes a processor 160, a main storage device 161, a network interface 162, an auxiliary storage device 163, a radio 164, and an antenna 140.
[0279]
　The processor 160 realizes the function of the baseband signal processing unit 120 by reading the program stored in the main storage device 161, loading it into the auxiliary storage device 163, and executing the loaded program. The processor 160 corresponds to, for example, the baseband signal processing unit 120 in the first embodiment.
[0280]
　Further, the network interface 162 corresponds to, for example, the transmission line interface 110 in the first embodiment. Further, the radio 164 corresponds to, for example, the RF transmitter / receiver 130 in the first embodiment.
[0281]
　FIG. 28B is a diagram showing a hardware configuration example of the terminal 200.
[0282]
　The terminal 200 includes a processor 260, a main storage device 261, a screen display device 262, an auxiliary storage device 263, a radio 264, and an antenna 210.
[0283]
　The processor 260 realizes the functions of the baseband signal processing unit 230 and the application unit 240 by reading the program stored in the main storage device 261, loading it into the auxiliary storage device 263, and executing the loaded program. The processor 260 corresponds to, for example, the baseband signal processing unit 230 and the application unit 240 in the first embodiment.
[0284]
　Further, the radio 264 corresponds to, for example, the RF transmission / reception unit 220 in the first embodiment.
[0285]
　The screen display device 262 displays an image by executing an application, for example, under the control of a processor 260.
[0286]
　The processors 160 and 260 may be, for example, a CPU (Central Processing Unit), an MPU (Micro Processing Unit), an FPGA (Field-Programmable Gate Array), a DSP (Digital Processing Unit), or the like.
[0287]
　Further, in the first embodiment, an example has been described in which the base station 100 and the terminal 200 perform carrier sense in units of two symbols and have a total of seven transmission opportunities in one slot. For example, when the base station 100 and the terminal 200 perform carrier sense in units of one symbol, the transmission opportunity exists 14 times in one slot. Then, for example, the base station 100 and the terminal 200 have described an example of shifting in symbol period units. For example, the base station 100 or the terminal 200 may shift the head symbol in a period unit (or time unit) shorter than the symbol period. Alternatively, the unit of shift may be an integral multiple of the symbol, and the transmission start timing may be in the middle of the symbol period. In this case, the control unit 122 of the base station 100 or the control unit 234 of the terminal 200, for example, copies the data or signal included in the head symbol, and when the head symbol is shifted, the copied data or signal is used as the head symbol. On the other hand, by adding in the forward direction in terms of time, transmission from the middle of the symbol period becomes possible. In the case of downlink transmission from the base station 100 and the search space is not set in the first symbol of the slot, or in the case of uplink transmission from the terminal 200, transmission may be started from the middle of the first symbol in accordance with the transmission start timing.
[0288]
　Further, in the first embodiment, an example in which data, DCI, RRC message, and HARQ-ACK are all transmitted using a predetermined frequency band of the unlicensed frequency band has been described. As the wireless system 10, communication is performed using both the licensed frequency band and the unlicensed frequency band, and a part or all of DCI, RRC message, HARQ-ACK regarding data transmission in the unlicensed frequency band is used in the licensed frequency band. You may send it.
Code description
[0289]
10: Wireless communication system 100: Base station device (base station)
110: Transmission line interface 120: Base band signal processing unit
121: Received signal processing unit 122: Control unit
123: PDCCH generation unit 124: PDSCH generation unit
125: Mapping unit 130: RF transmitter / receiver
140: Antenna 160: Processor
200 (200-1, 200-2): Terminal device (terminal)
210: Antenna 220: RF transmitter / receiver
230: Baseband signal processing unit 231: PDCCH reception processing unit
232: PDSCH reception processing unit 234: Control unit
235: PUSCH generation unit 236: PUCCH generation unit
237: Mapping unit 240: Application unit
260: Processor
The scope of the claims
[Claim 1]
　In a transmitting device capable of wireless communication with a receiving device using the first frequency band that does not require a license,
　it is confirmed that the first frequency band is not used by another transmitting device, and the first communication is performed. A first symbol containing a first control channel and a first shared channel in a direction, or a second symbol containing a second shared channel in a second communication direction different from the first communication direction. , The control unit that shifts in the time direction,
　and the first control signal and the first data assigned to the first symbol are used in the first control channel and the first shared channel, respectively. Alternatively
　, a transmitting device including a transmitting unit that transmits the second data assigned to the second symbol to the receiving device using the second shared channel .
[Claim 2]
　The control unit transmits the first control signal and the first data or the second data from the first symbol in the slot when the first frequency band is used by the other transmission device. The transmission device according to claim 1, wherein the first or second symbol is shifted in the time direction from the first symbol when the above is not possible.
[Claim 3]
　When the first control signal and the first data are shifted from the first symbol in the slot and transmitted, the control unit starts in the slot of the first data included in the first control signal. In the slot of the first data included in the first control signal when the symbol and the length from the start symbol are transmitted from the first symbol when the first control signal and the first data are transmitted from the first symbol. The transmission device according to claim 1, wherein the start symbol and the length from the start symbol are set respectively.
[Claim 4]
　The first control signal includes a start symbol and a length from the start symbol, and the
　start symbol is a symbol that actually starts transmission of the first data. The transmitter described.
[Claim 5]
　The transmission device according to claim 1, wherein the control unit shifts the first or second symbol in the time direction in units of symbol periods or in a period shorter than the symbol period.
[Claim 6]
　The transmitting unit can transmit a part of
　the first data that could not be transmitted in the first period allocated by the first control signal in a second period allocated by the third control signal.
　A part of the second data that could not be transmitted in the third period allocated by the first control signal or transmitted by the fourth control signal is assigned by the fourth control signal.
　The transmission device according to claim 1 , wherein the transmission is performed over a period of time .
[Claim 7]
　The control unit transmits the first control signal and the first data or the second data from the first symbol in the slot when the first frequency band is used by the other transmission device. When all of the first or second data cannot be transmitted in the first or second period assigned by the first control signal due to the inability to perform the first or second data, respectively. A part of the data of 2 is instructed to be transmitted in the second or fourth period, respectively, and the
　transmission unit sends a part of the first or second data in accordance with the instruction in the second or second.
　The transmission device according to claim 6 , wherein each transmission is performed in the period of 4 .
[Claim 8]
　The transmitting unit transmits a part of the first or second data that could not be transmitted in the first or third period included in the first slot period, respectively, in the first slot period. The transmission device according to claim 6, wherein transmission is performed in the second or fourth period included in the second slot period, which is the next slot period.
[Claim 9]
　The transmitting unit transmits a first message instructing that a part of the first or second data is transmitted in the second or fourth period by using the first shared channel. The transmitter according to claim 6.
[Claim 10]
　The control unit is an information element indicating whether or not the first data is transmitted in the first and second periods, or whether or not the second data is transmitted in the third and fourth periods. An information element indicating a slot number for transmitting a part of the first or second data, a symbol number of a symbol for starting transmission of a part of the first or second data, and a slot next to the first slot. 9. The transmission device according to claim 9, wherein the end symbol of the slot of 1 is further generated with an information element indicating whether or not to shift in the next slot.
[Claim 11]
　The transmitting device according to claim 9, wherein the first message is a PDSCH (Physical Downlink Shared CHannel) -Config or a PUSCH (Physical Uplink Shared CHannel) -Config included in the RRC Reconfiguration message.
[Claim 12]
　The first control channel and the first shared channel are PDCCH (Physical Downlink Control CHannel) and PDSCH (Physical Downlink Shared CHannel), respectively, and the second shared channel is PUSCH (Physical Uplink Control CHannel). 9. The transmitter according to claim 9.
[Claim 13]
　The claim is characterized in that the transmitting unit transmits a fifth control signal instructing that a part of the first data is transmitted in the second period using the first control channel. 6. The transmitting device according to 6.
[Claim 14]
　The transmitter includes the NDI (New Data Indicator), the HARQ (Hybrid Automatic Repeat reQuest) process number included in the first control signal, and the same NDI, HARQ process number, and RV as the RV, respectively. 13. The transmission device according to claim 13, which transmits a control signal.
[Claim 15]
　The transmission unit transmits the first control signal in the first slot period, and transmits the fifth control signal and a part of the first data to the second second after the first slot period. 13. The transmission device according to claim 13, wherein transmission is performed in a slot period.
[Claim 16]
　The control unit transmits another control signal including the fifth control signal to the area of ​​the first radio resource that transmits a part of the first data allocated by the fifth control signal. 13. The transmission device according to claim 13, wherein when the area of ​​the second radio resource is included, the portion of the first data allocated to the area of ​​the second radio resource is punctured.
[Claim 17]
　13. The transmitting device according to claim 13, wherein the first control channel and the first shared channel are PDCCH (Physical Downlink Control CHannel) and PDSCH (Physical Downlink Shared CHannel), respectively.
[Claim 18]
　The transmitting unit transmits a second message including an end symbol indicating a symbol indicating the end of transmission of the first data in the slot using the first shared channel, or a sixth including the end symbol. The transmission device according to claim 1, wherein a control signal is transmitted using the first control channel.
[Claim 19]
　The transmitting device according to claim 18, wherein the second message is a PDSCH (Physical Downlink Shared CHannel) -Config or a PUSCH (Physical Uplink Shared CHannel) -Config included in the RRC Reconfiguration message.
[Claim 20]
　The transmission according to claim 18, wherein the transmission unit transmits the sixth control signal including the end symbol instead of the length from the start symbol by using the first control channel. apparatus.
[Claim 21]
　The transmission unit transmits a third message including an information element representing a symbol capable of transmitting the first control signal in the slot using the first shared channel, and
　the third message is The contents of the information element in the slots after the second slot next to the first slot in which the transmission of the first data is started, and the contents of the information element in slots other than the slots after the second slot.
　The transmission device according to claim 1, wherein the third message having different contents is transmitted.
[Claim 22]
　21. The transmitting device according to claim 21, wherein the information element is a monitoringSybolsWithslot.
[Claim 23]
　The transmission unit transmits a third message including an information element representing a symbol capable of transmitting the first control signal in the slot using the first shared channel, and of
　the first control signal. The symbol capable of transmission is represented by a position relative to the symbol that actually started transmission of
　the first control signal, and the transmission unit includes a fourth symbol representing a transmission opportunity of the first control signal.
　The transmission device according to claim 1, wherein the message is transmitted using the first shared channel .
[Claim 24]
　23. The transmitting device according to claim 23, wherein the information element is a monitoringSybolsWithslot.
[Claim 25]
　The transmitting device is a base station apparatus, the reception apparatus is a terminal device, or,
　the transmitting device is a terminal device, the receiving device is a base station apparatus
　claims, characterized in that 1. The transmitting device according to 1.
[Claim 26]
　The second symbol includes a second control channel, and the
　transmitting unit uses the second shared channel and the second shared channel for the second data and the second control signal assigned to the second symbol. The transmitting device according to claim 1, wherein the data is transmitted to the receiving device by using the second control channel and the second control channel, respectively.
[Claim 27]
　26. The transmitting device according to claim 26, wherein the second control channel is a PUCCH (Physical Uplink Control CHannel).
[Claim 28]
　In a receiving device capable of wireless communication with a transmitting device using a first frequency band that does not require a license,
　the first control signal and the first data assigned to the first symbol are used as the first control channel. And the first shared channel, respectively, or the second data assigned to the second symbol using the second shared channel, the receiving unit receiving the second data from the transmitting device, and
　the first control. With the signal and the first data, or the second data, the first symbol including the first control channel and the first shared channel in the first communication direction, or the first. A
　receiving device including a control unit for confirming that the second symbol including the second shared channel in a second communication direction different from the communication direction of the above has been shifted in the time direction .
[Claim 29]
　The control unit has shifted the first or second symbol according to the start symbol in the slot and the length from the start symbol for the first data included in the first control signal. 28. The receiving device according to claim 28.
[Claim 30]
　The receiving unit receives a part of
　the first data that could not be received in the first period allocated by the first control signal in the second period allocated by the third control signal.
　A part of the second data that could not be received in the third period assigned by the first control signal or received by the fourth control signal is assigned by the fourth control signal.
　28. The receiving device according to claim 28, wherein the receiving device receives data in a period of time .
[Claim 31]
　The receiving unit receives
　a first message instructing that a part of the first or second data is transmitted in the second or fourth period, or receives the first message using the first shared channel, or ,
　The fifth control signal instructing to transmit a part of the first data in the second period is received by using the first control channel, and the
　receiving unit receives the first message.
　The receiving device according to claim 30 , wherein a part of the first data is received by the fifth control signal in the second or fourth period .
[Claim 32]
　In 　a wireless communication system including a transmitting device and a
　receiving device, in which the transmitting device and the receiving device
can wirelessly communicate using a first frequency band that does not require a license, the
　transmitting device is
　the first. The first symbol including the first control channel and the first shared channel in the first communication direction, or the first communication, confirming that the frequency band of is not used by other transmitters. A control unit that shifts a second symbol including a second shared channel in a second communication direction different from the direction in the time direction,
　a first control signal assigned to the first symbol, and first data. To the receiving device using the first control channel and the first shared channel, respectively, or by using the second shared channel to transfer the second data assigned to the second symbol to the receiving device. The 　receiving device
　includes a transmitting unit for transmitting 　the first control signal and the first data by using the first control channel and the first shared channel, respectively, or the second. A 　wireless communication system comprising a receiving unit for receiving data from the second shared channel using the second shared channel .

[Claim 33]
　A communication method in a transmitting device having a control unit and a transmitting unit and capable of wireless communication with a receiving device using a first frequency band that does not require a license
　. Make sure that the frequency band is not being used by another transmitter, the first symbol including the first control channel and the first shared channel in the first communication direction, or the first communication direction. A second symbol including a second shared channel in a second communication direction different from the
　above is shifted in the time direction, and the first control signal and the first control signal assigned to the first symbol by the transmitter are used. The data is received using the first control channel and the first shared channel, respectively, or the second data assigned to the second symbol is received using the second shared channel, respectively.
　A communication method characterized by transmitting to a device .