JP7210673B2 - Terminal, wireless communication method and wireless base station - Google Patents

Description

The present invention relates to a terminal, radio communication method, and radio base station in a next-generation mobile communication system.

In the UMTS (Universal Mobile Telecommunications System) network, long term evolution (LTE: Long Term Evolution) has been specified for the purpose of further high data rate, low delay, etc. (Non-Patent Document 1). In addition, LTE (also called LTE Rel.8 or 9) for the purpose of further broadening and speeding up, LTE-A (LTE Advanced, also called LTE Rel.10, 11 or 12) has been specified, LTE successor system (e.g., FRA (Future Radio Access), 5G (5th generation mobile communication system), NR (New Radio), NX (New radio access), FX (Future generation radio access), LTE Rel. 13, 14 or 15 and later) are also being considered.

LTE Rel. In 10/11, carrier aggregation (CA: Carrier Aggregation) that aggregates a plurality of component carriers (CC: Component Carrier) is introduced in order to widen the band. Each CC is LTE Rel. 8 system bands as one unit. Also, in CA, multiple CCs of the same radio base station (eNB: eNodeB) are set in a user terminal (UE: User Equipment).

On the other hand, LTE Rel. 12 also introduces dual connectivity (DC: Dual Connectivity) in which a plurality of cell groups (CG: Cell Groups) of different radio base stations are configured in a UE. Each cell group consists of at least one cell (CC). DC is also called inter-base-station CA (Inter-eNB CA), etc., since multiple CCs of different radio base stations are integrated in DC.

In an existing LTE system (eg, LTE Rel.8-13), a user terminal uses a downlink (DL) control channel (eg, PDCCH: Physical Downlink Control Channel, EPDCCH: Enhanced Physical Downlink Control Channel, MPDCCH: MTC (Machine Receives downlink control information (DCI) via Physical Downlink Control Channel, etc.). The user terminal receives a DL data channel (eg, PDSCH: Physical Downlink Shared Channel) and/or transmits a UL data channel (eg, PUSCH: Physical Uplink Shared Channel) at predetermined timing based on the DCI.

3GPP TS 36.300 V8.12.0 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)", April 2010

In future wireless communication systems (e.g., 5G, NR), in order to achieve high speed and large capacity (e.g., eMBB: enhanced Mobile Broad Band), frequency bands higher than existing frequency bands (e.g., 3 to 40 GHz etc. ) is being considered. In general, the higher the frequency band, the greater the distance attenuation, making it more difficult to ensure coverage. Therefore, MIMO (also called Multiple Input Multiple Output, Massive MIMO, etc.) using a large number of antenna elements is being studied.

In MIMO using a large number of antenna elements, beams (antenna directivity) can be formed by controlling the amplitude and/or phase of signals transmitted or received by each antenna element (BF: Beam Forming). . For example, when antenna elements are arranged two-dimensionally, the number of antenna elements (the number of antenna elements) that can be arranged in a given area increases as the frequency increases. The more antenna elements per given area, the narrower the beam width, thus increasing the beamforming gain. Therefore, when beamforming is applied, propagation loss (path loss) can be reduced and coverage can be ensured even in high frequency bands.

On the other hand, when beamforming is applied, beam degradation and/or link interruption (beam failure) may occur due to blockage due to obstacles, etc., and communication quality may be degraded.

Therefore, by transmitting the DL control channel (also referred to as NR-PDCCH, etc.) using a plurality of different time domain and / or frequency domain (one or more beams), ensure the robustness of the DL control channel (robustness) is being considered. However, when transmitting the DL control channel using a plurality of different time domain and / or frequency domain (one or more beams), the user terminal appropriately adjusts the scheduling timing of data scheduled in the DL control channel (DCI). may not be able to grasp

The present invention has been made in view of this point, and it is an object of the present invention to provide a terminal, a radio communication method, and a radio base station that can appropriately grasp the scheduling timing of data scheduled in the DL control channel (DCI). Let it be one.

A terminal according to an aspect of the present invention includes a receiver that receives downlink control information and a downlink shared channel scheduled by the downlink control information; a control unit that determines allocation of the downlink shared channel in the time domain based on one timing and a second timing specified by a symbol, wherein the control unit receives the downlink control information. A predetermined slot in which the downlink shared channel is scheduled is determined based on a slot and an offset value obtained from the information notified by the downlink control information, and the downlink shared channel is determined based on the information notified by the downlink control information. Symbols to be assigned are determined, and the first timing is based on a numerology of the downlink shared channel.

ADVANTAGE OF THE INVENTION According to this invention, the scheduling timing of the data scheduled by DL control channel (DCI) can be grasped appropriately.

It is a figure which shows an example of BPL. 2A and 2B are diagrams illustrating an example of NR-PDCCH monitoring. 3A and 3B are diagrams illustrating another example of NR-PDCCH monitoring. 4A and 4B are diagrams showing an example of a control method of data scheduling timing. FIG. 10 is a diagram showing another example of a control method of scheduling timing of data; FIG. 10 is a diagram showing another example of a control method of scheduling timing of data; FIG. 10 is a diagram showing another example of a control method of scheduling timing of data; FIG. 10 is a diagram showing another example of a control method of scheduling timing of data; 1 is a diagram showing an example of a schematic configuration of a radio communication system according to the present embodiment; FIG. 1 is a diagram showing an example of the overall configuration of a radio base station according to the present embodiment; FIG. FIG. 2 is a diagram showing an example of functional configuration of a radio base station according to the present embodiment; It is a figure which shows an example of the whole structure of the user terminal which concerns on this Embodiment. It is a figure which shows an example of functional structure of the user terminal which concerns on this Embodiment. It is a figure which shows an example of the hardware configuration of the radio base station and user terminal which concern on this Embodiment.

In future wireless communication systems (eg, 5G, NR), high speed and large capacity (eg, eMBB), a large number of terminals (eg, massive MTC (Machine Type Communication)), ultra-high reliability and low delay (eg, URLLLC ( Ultra Reliable and Low Latency Communications)) and other use cases are assumed. Assuming these use cases, for example, communication using beamforming (BF) is being studied in future wireless communication systems.

Beamforming (BF) includes digital BF and analog beam BF. Digital BF is a method of precoding signal processing (for digital signals) on the baseband. In this case, parallel processing of inverse fast Fourier transform (IFFT), digital to analog converter (DAC) and radio frequency (RF) is required for the number of antenna ports (RF chains). Become. On the other hand, it is possible to form as many beams as the number of RF chains at arbitrary timing.

Analog BF is a method that uses a phase shifter on RF. In this case, since only the phase of the RF signal is rotated, the configuration is easy and can be realized at low cost, but a plurality of beams cannot be formed at the same timing. Specifically, in analog BF, only one beam can be formed at a time per phase shifter.

For this reason, a radio base station (for example, called gNB (gNodeB), transmission and reception point (TRP), eNB (eNodeB), base station (Base Station (BS)), etc.) sets the phase shifter to 1 If there is only one, then only one beam can be formed at a time. Therefore, when transmitting a plurality of beams using only analog BFs, it is necessary to switch or rotate the beams in time, since simultaneous transmission cannot be performed using the same resource.

A hybrid BF configuration combining digital BF and analog BF is also possible. In future wireless communication systems (e.g., 5G, NR), the introduction of MIMO using a large number of antenna elements (e.g., Massive MIMO) is under consideration. , the circuit configuration may become expensive. For this reason, it is assumed that hybrid BFs will be used in future wireless communication systems.

When applying the above BF (including digital BF, analog BF, hybrid BF), beam quality due to blockage due to obstacles (e.g., received power (e.g., RSSI: Received Signal Strength Indicator and / or RSRP: Reference Signal Received Power, etc.) and / or reception quality (e.g., received signal-to-noise ratio (SNR), received signal-to-interference plus noise power ratio (SINR: Signal-to-Interference plus Noise power Ratio and RSRQ: at least one of the Reference Signal Received Quality)) and/or link disruptions (beam failure), especially for narrower beams at high frequency bands. When used, there is a high possibility that the communication quality will be degraded due to the influence of obstacles and the like.

Therefore, in order to ensure beam robustness, multiple DL control channels (also referred to as NR-PDCCHs) scheduling the same data are allocated to multiple beams using different time and/or frequency resources. It is also being considered to transmit using A user terminal monitors NR-PDCCHs transmitted using multiple beams on different time resources and/or frequency resources.

The multiple beams applied to the NR-PDCCH may be multiple transmit beams or receive beams, or multiple beam pair links (BPL). A beam pair link (BPL) is a beam used for signal transmission (eg, base station side) (also referred to as a transmission beam, Tx beam, etc.) and a beam used for receiving the signal (eg, UE side) ( Also called a receive beam, an Rx beam, etc.). The BPL may be determined by the user terminal using a DL signal (for example, a reference signal) transmitted from the radio base station, or may be determined by the radio base station based on a measurement report or the like from the user terminal. good.

FIG. 1 is a diagram showing an example of BPL. For example, in FIG. 1, the radio base station transmits mobility measurement signals (mobility measurement signals) using one or more beams (here, B1 to B3). In FIG. 1, the user terminal receives power (eg, RSSI and/or RSRP) and/or received quality (eg, at least one of RSRQ, SNR and SINR) of mobility measurement signals associated with beams B1 to B3 to measure. A user terminal transmits an identifier of one or more beams (also referred to as a beam ID, beam index (BI), etc.) and/or a measurement report (MR) indicating measurement results to the radio base station. Alternatively, the user terminal may transmit one or more beam pair link identifiers (also referred to as beam pair link ID, BPLI, BPLID, etc.) and/or a measurement report (MR: Measurement Report) indicating measurement results to the radio base station. good.

The radio base station determines Tx beams B21-B24 to be used for data communication or control signal communication with the user terminal based on the measurement report. The user terminal measures the CSI-RS resources #1-#4 respectively associated with the Tx beams B21-B24 or the BPL composed of each Tx beam and the corresponding Rx beam and generates one or more CSI reports. In FIG. 1, the user terminal may select a predetermined number of Tx beams or BPLs based on the measurement results and report CSI for the Tx beams or BPLs to the radio base station. The user terminal may also determine a suitable Rx beam for each selected Tx beam and determine a beam pair link (BPL). Also, the user terminal may report one or more determined BPLs to the radio base station.

FIG. 1 shows a case where the Tx beam B23 and the Rx beam b3 are selected as the best BPL, and the Tx beam B22 and the Rx beam b2 are selected as the second best BPL. A predetermined BPL may be selected in the radio base station based on a report from the user terminal, and the predetermined BPL may be notified to the user terminal by higher layer signaling or MAC signaling. Also, the BPL and radio resources (predetermined frequency resources and/or time resources) may be associated and set. good.

A radio base station may transmit NR-PDCCH using M (M≧1) Tx beams (or BPLs) determined based on CSI from user terminals. The user terminal may monitor (blind decode) the NR-PDCCH on at least one of the M BPLs. A user terminal may monitor the NR-PDCCH on all M BPLs or may monitor the NR-PDCCH on some of the M BPLs. The maximum value of M may be determined based on user terminal capabilities.

A user terminal may monitor NR-PDCCH transmitted on one or more beams (BPL or Tx beams) transmitted on one or more time and/or frequency resources. Also, the user terminal may monitor the NR-PDCCH of one beam at a shorter period than other beams. Monitoring of NR-PDCCH across multiple time resources may also be applied when the user terminal does not have multiple RF chains (antenna ports).

Note that the unit of time resources corresponding to different beams may be one or more slots (or minislots) or one or more symbols. In addition, frequency resource units corresponding to different beams are one or more resource blocks (RB), one or more resource element groups (REG), one or more REG groups, or one or more control channel elements (CCE), etc. may be Here, a REG group is composed of a plurality of REGs. A REG is composed of multiple resource elements (REs). An RE consists of one symbol and one subcarrier.

In this way, by transmitting a plurality of NR-PDCCHs that schedule predetermined data using different beams (eg, BPL), even if one beam deteriorates, the user terminal can transmit NR- PDCCH can be received. By transmitting the NR-PDCCH using a plurality of beams, it is possible to suppress degradation in communication quality due to blockage caused by obstacles.

By the way, in the existing LTE system, when a user terminal receives a DL control channel (DCI) for scheduling data, it transmits and receives data after a predetermined timing. For example, when DCI (also called UL grant) instructing UL transmission is received, the user terminal performs UL transmission after a predetermined timing (for example, 4 ms). Also, when receiving DCI (also referred to as DL grant or DL assignment) that instructs DL transmission, the user terminal performs DL reception in the same subframe. Thus, in the existing LTE system, when receiving the DL control channel, transmission and reception are controlled at predetermined scheduling timing.

On the other hand, when a plurality of NR-PDCCHs (DCI) are transmitted as described above, how to control the data reception timing and/or transmission timing becomes a problem. In particular, when a user terminal detects multiple NR-PDCCHs for scheduling the same data using different time resources, the existing method may not be able to properly grasp the scheduling timing of the data.

Therefore, when monitoring multiple NR-PDCCHs (DCI) transmitted using different beams, the present inventors do not schedule data after a predetermined timing from the detection of the DCI, but detect It has been found that at least information indicating data scheduling timing is included in the DCI. With this configuration, even when NR-PDCCH (DCI) that schedules data on the same time resource is transmitted on different time resources, the user terminal can appropriately grasp the scheduling timing of data based on the information notified by DCI. It becomes possible to

Hereinafter, this embodiment will be described in detail with reference to the drawings. It should be noted that the beamforming in the present embodiment assumes digital BF, but can also be appropriately applied to analog BF and hybrid BF. Further, in the present embodiment, the "beam" is a beam used for transmitting a DL signal from a radio base station (also referred to as a transmission beam, Tx beam, etc.) and/or a beam used for receiving a DL signal in a user terminal (also referred to as receive beams, Rx beams, etc.). Alternatively, the beam used for transmitting the UL signal from the user terminal (transmission beam, Tx beam, etc.) and / or the beam used for receiving the UL signal in the radio base station (reception beam, Rx beam, etc.) may contain. A combination of Tx and Rx beams may be referred to as a beam pair link (BPL) or the like.

(First aspect)
In a first example, a transmission method for transmitting NR-PDCCH using a predetermined beam using different time resources and/or frequency resources will be described.

One NR-PDCCH may be transmitted and received on multiple time resources and / or frequency resources associated with one beam, or multiple time resources and / or frequencies respectively associated with multiple beams. Transmission and reception may be controlled by resources.

When a single NR-PDCCH is transmitted and received on multiple time resources and/or frequency resources respectively associated with multiple beams, the NR-PDCCH is divided and assigned to multiple time resources and/or frequency resources. may Alternatively, the NR-PDCCH may be duplicated (repeatedly generating the same NR-PDCCH) and allocated to multiple time resources and/or frequency resources. NR-PDCCH, which is transmitted and received on multiple beams, will be described in detail with reference to FIGS. Although only the Tx beams are shown in FIGS. 2 and 3, the Rx beams (or BPL) corresponding to the Tx beams may also be used.

In FIG. 2, a single NR-PDCCH is composed of (divided into) multiple coded data, and the multiple coded data are transmitted using different beams. For example, FIGS. 2A and 2B show examples in which a single NR-PDCCH corresponds to multiple coded data (here, two coded data).

In FIG. 2A, two coded data are mapped to different frequency resources of the same symbol (OFDM symbol) and transmitted using different beams #1 and #2, respectively. On the other hand, in FIG. 2B, two coded data are mapped to frequency resources of different symbols and transmitted using different beams #1 and #2, respectively.

As shown in FIGS. 2A and 2B, if a single NR-PDCCH is monitored with M beams, theoretically, if the coding rate of the NR-PDCCH is 1/M or less, the user terminal Detection of one of the M beams will allow the corresponding NR-PDCCH to be recovered.

FIG. 3 is a diagram showing another example of NR-PDCCH transmitted (base station side) and monitored (UE side) in multiple beams. In FIG. 3, the same NR-PDCCH is repeated (duplicated), and multiple duplicated NR-PDCCHs are transmitted using multiple different beams. Repetition duplicates the DCI before error correction coding (after adding CRC), performs error correction coding, rate matching, and data modulation on each, generates NR-PDCCH for each, and then makes each different. Alternatively, the NR-PDCCH generated by error correction, rate matching, and data modulation may be duplicated and transmitted using different beams. For example, FIGS. 3A and 3B show examples in which the same NR-PDCCH is repeated multiple times (here, twice).

In FIG. 3A, two NR-PDCCHs with the same content are mapped to different frequency resources of the same symbol and transmitted using different beams #1 and #2, respectively. On the other hand, in FIG. 3B, the two NR-PDCCHs are mapped to frequency resources of different symbols and transmitted using different beams #1 and #2, respectively.

As shown in FIGS. 3A and 3B, when multiple repeated NR-PDCCHs are monitored in M beams, the multiple NR-PDCCHs are assigned to different candidate resources (also called NR-PDCCH candidates, etc.) in the same search space. ), or may be placed on candidate resources in different search spaces.

As shown in FIGS. 3A and 3B, if repeated NR-PDCCHs are monitored in M beams, the user terminal can recover the NR-PDCCH by detecting one of the M beams. When detecting multiple beams, the user terminal may combine multiple NR-PDCCHs.

Note that multiple repeated NR-PDCCHs can also be transmitted on the same beam. If multiple repeated NR-PDCCHs are transmitted in the same beam, the channel estimates obtained with respective RSs corresponding to multiple NR-PDCCHs can be averaged/filtered to improve channel estimation accuracy. . Alternatively, if multiple repeated NR-PDCCHs are transmitted on the same beam, an RS corresponding to only one or some of the multiple NR-PDCCHs may be transmitted. In this case, RS overhead can be reduced and performance improved. When multiple NR-PDCCHs are transmitted repeatedly on different beams, it is desirable to independently perform channel estimation and demodulation using RSs corresponding to each beam.

The user terminal may be configured with higher layer signaling to indicate whether it is possible to average/filter the channel estimates obtained in each RS corresponding to multiple repeated NR-PDCCHs. Alternatively, the user terminal can obtain channel estimates for each RS corresponding to the repeated NR-PDCCHs, regardless of whether the repeated NR-PDCCHs are transmitted on the same beam or on different beams. Channel estimation may be performed independently without averaging/filtering the values. As described above, whether the transmission beams for multiple repeated NR-PDCCHs are the same or different, and if they are different, information such as how they differ is not necessarily identified by the user terminal, but can be appropriately controlled. is possible.

Also, when NR-PDCCH is transmitted using a plurality of beams, the user terminal demodulates each NR-PDCCH using a predetermined demodulation reference signal for each beam. At this time, channel estimation may be performed without averaging between different beams. By performing channel estimation for each beam, it is possible to accurately grasp the channel state for each beam.

(Second aspect)
In the second aspect, the timing information included in the downlink control information (DCI) transmitted in the DL control channel (eg, NR-PDCCH), and the reception of DL data and / or UL data using a predetermined reference timing will be described.

The user terminal uses the timing information included in the DCI transmitted on the detected NR-PDCCH and the preset predetermined reference timing to recognize the reception timing and / or transmission timing of the data scheduled on the DCI. . The timing information included in the DCI may be an offset value from a preset reference timing. The offset value may be a configurable value or a fixed value.

Further, by setting a plurality of offset value candidates in advance in association with a plurality of bit information (for example, defining a table) and notifying predetermined bit information using DCI, a predetermined offset value can be sent to the user terminal. may notify you. Also, the plurality of offset value candidates may be defined as fixed values, or may be appropriately set using higher layer signaling or the like.

The offset value is defined in a predetermined time unit (eg, scheduling unit). For example, the offset value is defined by the number of OFDM symbols or the number of sets of OFDM symbols. An OFDM symbol set consists of a combination of multiple OFDM symbols. Alternatively, the offset value may be defined by the number of minislots or the number of sets of minislots. A minislot set consists of a combination of minislots. Alternatively, the offset value may be defined by the number of slots or the number of sets of slots. A slot set consists of a combination of multiple slots.

Also, an offset value may be defined by combining at least two of a plurality of scheduling units (OFDM symbols, minislots, slots, etc.). Also, different scheduling units may be used to define offset values for DL data scheduling and UL data scheduling. For example, the offset value included in DCI for scheduling DL data may be defined in symbols and/or minislots, and the offset value included in DCI for scheduling UL data may be defined in slots. Of course, it is not limited to this.

The reference timing is set in advance in the user terminal and serves as a reference when applying the offset value notified by the DCI. The reference timing may be fixedly set by specifications or the like, or may be set using higher layer signaling (for example, RRC signaling, broadcast information) from the radio base station to the user terminal. As an example, the beginning of a predetermined scheduling unit (for example, slot) may be defined as the reference timing. Of course, the time unit and position for setting the reference timing are not limited to this.

The reference timing is commonly set regardless of which time resource (eg, symbol) the NR-PDCCH (DCI) is transmitted. Therefore, even when multiple DCIs scheduling the same data (eg, NR-PDCCHs corresponding to different BPLs) are transmitted in different time resources, the offset values included in each DCI are the same.

A user terminal may control data reception timing and/or transmission timing on the assumption that multiple NR-PDCCHs (DCI) that schedule the same data include the same offset value. NR-PDCCHs scheduling the same data are transmitted on different frequency resources and/or time resources, for example, by applying different beams (eg, BPL). A user terminal receives DCI by monitoring NR-PDCCHs to which different beams are applied (which may also be called NR-PDCCH candidates or search spaces). The NR-PDCCH monitored by the user terminal may be set in advance by the radio base station.

FIG. 4 shows a case where the reception of DL data is controlled based on the offset value notified by DCI and the reference timing. FIG. 4 shows a case where the head of the slot is set as the reference timing. Note that the reference timing is not limited to the beginning of the slot. Also, FIG. 4 shows a case where the reception of DL data is controlled, but the transmission of UL data may also be controlled based on the offset value notified by DCI and the reference timing.

FIG. 4 shows a case where DCI and DL data are transmitted in a slot composed of 14 OFDM symbols (#0-#13). A slot consists of 6 mini-slots (#0-#5), and each mini-slot consists of 3, 2, 2, 2, 2, 3 symbols in the time direction. Applicable slot configurations and mini-slot configurations are not limited to this. For example, in the time direction, a minislot may consist of 2, 2, 2, 2, 2, 2, 2 symbols within a slot, or may consist of 2, 3, 2, 2, 2, 3 symbols. Alternatively, the number of symbols per minislot may be configured with a different number of symbols. One minislot may span two slots.

FIG. 4A shows a case where data #1 is allocated to minislot #3 (or symbols #7 and #8) and data #2 is allocated to minislot #4 (or symbols #9 and #10). ing. Each data is scheduled on one or more NR-PDCCHs (DCI) respectively. Here, a case is shown in which DCI #1 that schedules data #1 and DCI #2 that schedules data #2 are transmitted using the same time resource (here, symbol #0).

The offset value included in each DCI is determined from the reference timing and the planned data allocation position. Since the reference timing is the beginning of the slot in FIG. 4A, the offset between the reference timing and data #1 is 7 symbols+8 symbols (or 3 minislots). Similarly, the offset between the reference timing and data #2 is 9 symbols + 10 symbols (or 4 minislots).

The radio base station transmits an offset value equivalent to 7 symbols+8 symbols (or 3 minislots) in DCI#1 that schedules data #1. Also, the radio base station transmits an offset value corresponding to 9 symbols+10 symbols (or 4 minislots) in DCI#2 that schedules data #2.

When data is allocated to a plurality of scheduling units (for example, multiple symbols and/or multiple mini-slots), the entire period during which data is allocated may be included in the offset value and notified, or only a portion (for example, data Allocation start position and/or end position) may be included in the offset value and notified. A user terminal can recognize the reception timings of data #1 and data #2 based on the offset values and reference timings included in DCI #1 and DCI #2, respectively.

FIG. 4B shows a case where DCI #2 that schedules data #2 is transmitted on a different time resource (here, symbol #1) from DCI #1. That is, in FIG. 4B, the time resource for transmitting DCI#2 is changed compared to FIG. 4A.

However, since the scheduling timing of data #2 is determined based on the reference timing, the offset value included in DCI#2 is the same value as DCI#2 in FIG. 4A. In this way, by controlling the data scheduling timing based on the reference timing, the same offset value can be obtained regardless of the timing (time resource) at which DCI is transmitted. When the user terminal detects at least one NR-PDCCH, it may stop detecting NR-PDCCHs of other beams.

FIG. 5 shows a case where data scheduling is performed on a slot-by-slot basis. In this case, the offset value included in the DCI is specified at least in units of slots. In FIG. 5, data #2, #1, and #3 are assigned to slots #1, #2, and #3, respectively, and data #1 to #3 are DCI #1, #2, and # transmitted in different slots, respectively. 3 (cross-slot scheduling).

In FIG. 5, DCI #1 transmitted in slot #0 schedules data #1 assigned to slot #2. When the reference timing is set at the beginning of the slot (here, #0) where DCI (NR-PDCCH) is detected, the offset value included in DCI #1 is 2.

Also, DCI #2 transmitted in slot #0 schedules data #2 assigned to slot #1. Therefore, the offset value included in DCI#2 is 1. Also, DCI #3 transmitted in slot #1 schedules data #3 assigned to slot #3. Therefore, the offset value included in DCI#3 is two.

Although FIG. 5 shows a case where data scheduling is controlled using DCI transmitted in different slots (cross-slot scheduling), DCI and data may be arranged in the same slot. In this case, the offset value included in the DCI should be set to 0. Also, FIG. 5 shows the case where the offset value is notified in slot units, but in addition to the slot, information in symbol and/or mini slot units may be included in the offset value and notified. With this, when cross-slot scheduling is performed, data allocation can be controlled in units of symbols and/or mini-slots.

FIG. 6 illustrates a case where multiple NR-PDCCHs (DCI) scheduling data on the same time resource (eg, the same data) are assigned to different time resources. FIG. 6 shows the case where the NR-PDCCH (DCI) that schedules data to be transmitted in symbols #7 and #8 (minislot #3) is transmitted in symbol #0 and symbol #1, respectively. The same or different beams (eg, BPL) are applied to the NR-PDCCHs (DCI) transmitted in symbol #0 and symbol #1, respectively.

Also in FIG. 6, the scheduling timing of data is controlled based on the reference timing (for example, the beginning of the slot). Therefore, the offset values included in the DCIs transmitted in symbol #0 and symbol #1 are the same. If the reference timing is set at the beginning of the slot, each DCI includes an offset value equivalent to 7 symbols+8 symbols (or 3 minislots). A user terminal controls the reception timing and/or transmission timing of data using the offset value and the reference timing notified by at least one DCI.

When the user terminal detects at least one NR-PDCCH, it may stop detecting NR-PDCCHs of other beams. Such an operation can reduce the processing load on the user terminal. Alternatively, when a user terminal receives multiple NR-PDCCHs (DCI), it may combine multiple DCIs to control data reception and/or transmission.

Alternatively, the user terminal may control the reception and / or transmission of data based on the first detected NR-PDCCH (DCI), the last detected NR-PDCCH (DCI) based on the data reception and/or may control transmission. In this case, when the user terminal receives multiple DCIs that schedule the same data, based on the predetermined DCI, the scheduling timing, parameters used for reception processing, and parameters used for transmission processing (resources used for UL transmission , coding rate, etc.).

(Third aspect)
In a third aspect, the timing information included in the DCI transmitted in the DL control channel (eg, NR-PDCCH) and the reception timing of the DCI using the reception timing of DL data and / or control the transmission of UL data A case of doing so will be explained.

The user terminal uses the timing information included in the detected NR-PDCCH (DCI) and the detection timing of the NR-PDCCH to control the reception timing and/or transmission timing of data scheduled by the DCI. The timing information included in DCI may be an offset value from the detection timing of NR-PDCCH. The offset value notified by DCI may be a configurable value or a fixed value.

Further, by setting a plurality of offset value candidates in advance in association with a plurality of bit information (for example, defining a table) and notifying predetermined bit information using DCI, a predetermined offset value can be sent to the user terminal. may notify you. Also, the plurality of offset value candidates may be defined as fixed values, or may be appropriately set using higher layer signaling or the like.

The offset value is specified in a predetermined time unit (eg, scheduling unit). For example, the offset value is defined by the number of OFDM symbols or the number of sets of OFDM symbols. Alternatively, the offset value may be defined by the number of minislots or the number of sets of minislots. Alternatively, the offset value may be defined by the number of slots or the number of sets of slots.

Also, an offset value may be defined by combining at least two of a plurality of scheduling units (OFDM symbols, minislots, slots, etc.). Also, different scheduling units may be used to define offset values for DL data scheduling and UL data scheduling. For example, the offset value included in DCI for scheduling DL data may be defined in symbols and/or minislots, and the offset value included in DCI for scheduling UL data may be defined in slots. Of course, it is not limited to this.

When a plurality of NR-PDCCHs (DCI) scheduling data for the same time resource are transmitted, an offset value included in each DCI is set according to the timing at which each DCI is transmitted. Therefore, when multiple DCIs scheduling the same data are transmitted on different time resources, the offset values included in each DCI are different.

FIG. 7 illustrates a case where multiple NR-PDCCHs (DCI) scheduling data on the same time resource (eg, the same data) are assigned to different time resources. FIG. 7 shows the case where the NR-PDCCH (DCI) that schedules data to be transmitted in symbols #7 and #8 (minislot #3) is transmitted in symbols #0 and #3, respectively. The same or different beams (eg, BPL) are applied to the NR-PDCCHs (DCI) transmitted in symbol #0 and symbol #3, respectively.

In this case, data scheduling timing is controlled based on the detection timing of each DCI. Therefore, the offset values included in the DCIs transmitted in symbol #0 and symbol #3 are different values. The DCI transmitted in symbol #0 includes an offset value equivalent to 7 symbols+8 symbols (or 3 minislots). DCI transmitted in symbol #3 includes an offset value equivalent to 4 symbols+5 symbols (or 2 minislots). A user terminal controls data reception timing and/or transmission timing using the offset value notified by at least one DCI and the reception timing of the DCI.

When the user terminal detects at least one NR-PDCCH, it may stop detecting NR-PDCCHs of other beams. Such an operation can reduce the processing load on the user terminal. Alternatively, when a user terminal receives multiple NR-PDCCHs (DCI), it may combine multiple DCIs to control data reception and/or transmission.

Alternatively, the user terminal may control the reception and / or transmission of data based on the first detected NR-PDCCH (DCI), the last detected NR-PDCCH (DCI) based on the data reception and/or may control transmission. In this case, when the user terminal receives multiple DCIs that schedule the same data, based on the predetermined DCI, the scheduling timing, parameters used for reception processing, and parameters used for transmission processing (resources used for UL transmission , coding rate, etc.).

(Fourth aspect)
A fourth aspect describes a case where timing information included in DCI transmitted on a DL control channel (eg, NR-PDCCH) is used to control reception of DL data and/or transmission of UL data.

A user terminal uses the timing information included in the detected NR-PDCCH (DCI) to control the reception timing and/or transmission timing of data scheduled in that DCI. The timing information included in the DCI may be information (eg, an absolute index of the scheduling unit) indicating the location where data is scheduled. In other words, the user terminal can determine the scheduling timing of data using the information specified by the DCI regardless of the reception timing of the NR-PDCCH (DCI).

The timing information (eg, scheduling unit index) is a slot index within a subframe or within a radio frame. Alternatively, the timing information may be a minislot index within a slot, subframe, or radio frame. Alternatively, the timing information may be a symbol index within a minislot, within a slot, within a subframe, or within a radio frame.

FIG. 8 illustrates a case where multiple NR-PDCCHs (DCIs) scheduling data on the same time resource (eg, the same data) are assigned to different time resources. FIG. 8 shows the case where the NR-PDCCH (DCI) that schedules data to be transmitted in symbols #m and #m+1 (slot #n) is transmitted in symbol #0 and symbol #1, respectively. Also, a case is shown in which different beams #1 and #2 (eg, BPL) are applied to NR-PDCCH (DCI) transmitted in symbol #0 and symbol #1, respectively.

In FIG. 8, the scheduling timing of data is controlled based on the timing information (eg, scheduling unit index) included in each DCI. Therefore, the timing information included in the DCIs transmitted in symbol #0 and symbol #1 indicate the same scheduling index.

Here, the DCI transmitted in symbol #0 includes timing information indicating slot #n and symbol #m+#m+1. Similarly, DCI transmitted in symbol #1 also includes timing information indicating slot #n and symbol #m+#m+1. A user terminal controls data reception timing and/or transmission timing using timing information notified by at least one DCI.

The timing information included in each DCI may be set in advance by associating a plurality of timing information candidates with a plurality of bit information (for example, defining a table). The radio base station may report predetermined timing information to the user terminal by reporting predetermined bit information using DCI. Also, the plurality of timing information candidates may be defined as fixed values, or may be appropriately set using higher layer signaling or the like.

Timing information is defined in predetermined time units (eg, scheduling units). For example, OFDM symbols, minislots, and/or slots are used to define the timing information. Also, timing information may be defined by combining at least two of a plurality of scheduling units (OFDM symbols, minislots, slots, etc.).

Also, different scheduling units may be used to define timing information for scheduling DL data and scheduling UL data. For example, the timing information included in DCI for scheduling DL data may be defined in terms of symbols and/or minislots, and the timing information included in DCI for scheduling UL data may be defined in terms of slots, minislots and/or symbols. .

Also, when the user terminal detects at least one NR-PDCCH, it may stop detecting NR-PDCCHs of other beams. Such an operation can reduce the processing load on the user terminal. Alternatively, if the user terminal receives multiple NR-PDCCHs (DCI), it may combine the two DCIs to control data reception and/or transmission.

Alternatively, the user terminal may control the reception and / or transmission of data based on the first detected NR-PDCCH (DCI), the last detected NR-PDCCH (DCI) based on the data reception and/or may control transmission. In this case, when the user terminal receives multiple DCIs that schedule the same data, based on the predetermined DCI, the scheduling timing, parameters used for reception processing, and parameters used for transmission processing (resources used for UL transmission , coding rate, etc.).

(Modification)
The configurations shown in the above-described second to fourth aspects may be applied in combination. For example, the index of the slot in which data is scheduled is determined based on the offset value included in the DCI using the slot in which the NR-PDCCH (DCI) is transmitted as a reference timing. Then, the mini-slot index and/or symbol index at which data is scheduled in the slot may be determined in another bit field (a bit field different from the offset value) of DCI.

Alternatively, the minislot index and/or symbol index where data is scheduled is determined based on the offset value included in the DCI using the minislot and/or symbol where the NR-PDCCH (DCI) is transmitted as a reference timing. Then, the index of the slot in which the data is scheduled may be determined using another bit field (a bit field different from the offset value) of DCI.

In this way, by notifying the user terminal of the offset value and the predetermined scheduling unit using the DCI, it is possible to appropriately control the scheduling of data in a predetermined region (minislots and/or symbols) within a predetermined slot. can.

(wireless communication system)
The configuration of the radio communication system according to this embodiment will be described below. In this radio communication system, communication is performed using any one of the radio communication methods according to the above embodiments of the present invention or a combination thereof.

FIG. 9 is a diagram showing an example of a schematic configuration of a radio communication system according to this embodiment. In the radio communication system 1, carrier aggregation (CA) and / or dual connectivity (DC) that integrates a plurality of basic frequency blocks (component carriers) with the system bandwidth of the LTE system (e.g., 20 MHz) as one unit is applied. can do.

The wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system that implements these.

A radio communication system 1 includes a radio base station 11 forming a macro cell C1 with a relatively wide coverage, and a radio base station 12 (12a-12c) arranged in the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. , is equipped with User terminals 20 are arranged in the macro cell C1 and each small cell C2.

A user terminal 20 can be connected to both the radio base station 11 and the radio base station 12 . The user terminal 20 is assumed to use the macrocell C1 and the small cell C2 simultaneously with CA or DC. Also, the user terminal 20 may apply CA or DC using multiple cells (CCs) (eg, 5 or less CCs, 6 or more CCs).

Communication between the user terminal 20 and the radio base station 11 can be performed using a carrier with a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (known as an existing carrier, legacy carrier, etc.). On the other hand, between the user terminal 20 and the radio base station 12, a carrier with a relatively high frequency band (for example, 3 to 40 GHz) and a wide bandwidth may be used. The same carrier as may be used. Note that the configuration of the frequency band used by each radio base station is not limited to this.

Between the radio base station 11 and the radio base station 12 (or between two radio base stations 12) is a wired connection (for example, an optical fiber conforming to CPRI (Common Public Radio Interface), an X2 interface, etc.) or a wireless connection. It can be configured to

The radio base station 11 and each radio base station 12 are each connected to a higher station apparatus 30 and connected to a core network 40 via the higher station apparatus 30 . Note that the upper station device 30 includes, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), etc., but is not limited to these. Also, each radio base station 12 may be connected to the higher station apparatus 30 via the radio base station 11 .

Note that the radio base station 11 is a radio base station having relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission/reception point, or the like. Also, the radio base station 12 is a radio base station having local coverage, and includes a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), a transmission/reception It may also be called a point or the like. Hereinafter, the radio base station 11 and the radio base station 12 are collectively referred to as the radio base station 10 when not distinguished from each other.

Each user terminal 20 is a terminal compatible with various communication systems such as LTE and LTE-A, and may include not only mobile communication terminals (mobile stations) but also fixed communication terminals (fixed stations).

In the radio communication system 1, as a radio access scheme, orthogonal frequency division multiple access (OFDMA) is applied to the downlink, and single carrier frequency division multiple access (SC-FDMA) is applied to the uplink. Frequency Division Multiple Access) and/or OFDMA are applied.

OFDMA is a multi-carrier transmission scheme in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers) and data is mapped to each subcarrier for communication. SC-FDMA is a single-carrier transmission scheme that divides the system bandwidth into bands consisting of one or continuous resource blocks for each terminal, and uses different bands for multiple terminals to reduce interference between terminals. be. Note that the uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.

In the radio communication system 1, as downlink (DL) channels, a DL data channel (PDSCH: Physical Downlink Shared Channel) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), downlink L1/L2 control A channel or the like is used. User data, higher layer control information, SIB (System Information Block), etc. are transmitted by the PDSCH. Moreover, MIB (Master Information Block) is transmitted by PBCH.

The downlink L1/L2 control channel includes PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), and the like. Downlink control information (DCI: Downlink Control Information) including scheduling information of PDSCH and PUSCH, etc. are transmitted by PDCCH. PCFICH carries the number of OFDM symbols used for PDCCH. HARQ (Hybrid Automatic Repeat reQuest) acknowledgment information (for example, retransmission control information, HARQ-ACK, ACK/NACK, etc.) for PUSCH is transmitted by PHICH. The EPDCCH is frequency-division multiplexed with the PDSCH, and is used to transmit DCI and the like like the PDCCH. PDCCH and/or EPDCCH are also called DL control channel, NR-PDCCH, and so on.

In the radio communication system 1, as uplink (UL) channels, a UL data channel (PUSCH: Physical Uplink Shared Channel) shared by each user terminal 20, a UL control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH: Physical Random Access Channel) or the like is used. User data and higher layer control information are transmitted by PUSCH. In addition, downlink radio quality information (CQI: Channel Quality Indicator), acknowledgment information, and the like are transmitted by PUCCH. A random access preamble for connection establishment with a cell is transmitted by PRACH.

In the radio communication system 1, as DL reference signals, cell-specific reference signals (CRS: Cell-specific Reference Signal), channel state information reference signals (CSI-RS: Channel State Information-Reference Signals), demodulation reference signals (DMRS: DeModulation Reference Signal), Positioning Reference Signal (PRS), Mobility Reference Signal (MRS), etc. are transmitted. In addition, in the radio communication system 1, a measurement reference signal (SRS: Sounding Reference Signal), a demodulation reference signal (DMRS), etc. are transmitted as UL reference signals. Note that DMRS may also be called a user terminal-specific reference signal (UE-specific reference signal). Also, the reference signals to be transmitted are not limited to these. Also, in the radio communication system 1, a synchronization signal (PSS and/or SSS), a broadcast channel (PBCH), etc. are transmitted in the downlink.

<Wireless base station>
FIG. 10 is a diagram showing an example of the overall configuration of a radio base station according to this embodiment. The radio base station 10 includes a plurality of transmitting/receiving antennas 101 , an amplifier section 102 , a transmitting/receiving section 103 , a baseband signal processing section 104 , a call processing section 105 and a transmission line interface 106 . Note that the transmitting/receiving antenna 101, the amplifier section 102, and the transmitting/receiving section 103 may be configured to include one or more.

User data transmitted from the radio base station 10 to the user terminal 20 on the downlink is input from the higher station apparatus 30 to the baseband signal processing section 104 via the transmission line interface 106 .

In the baseband signal processing unit 104, regarding user data, PDCP (Packet Data Convergence Protocol) layer processing, user data division / combination, RLC (Radio Link Control) RLC layer transmission processing such as retransmission control, MAC (Medium Access Control) Transmission processing such as retransmission control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (IFFT: Inverse Fast Fourier Transform) processing, precoding processing, etc. 103. The DL control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and transferred to the transmission/reception unit 103 .

The transmitting/receiving unit 103 converts the baseband signal output from the baseband signal processing unit 104 after precoding for each antenna into a radio frequency band and transmits the converted signal. A radio frequency signal frequency-converted by the transmitting/receiving section 103 is amplified by the amplifier section 102 and transmitted from the transmitting/receiving antenna 101 . The transmitting/receiving section 103 can be composed of a transmitter/receiver, a transmitting/receiving circuit, or a transmitting/receiving device described based on common recognition in the technical field of the present invention. The transmitting/receiving section 103 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section.

On the other hand, as for the UL signal, the radio frequency signal received by the transmitting/receiving antenna 101 is amplified by the amplifier section 102 . The transmitting/receiving section 103 receives the UL signal amplified by the amplifier section 102 . Transmitting/receiving section 103 frequency-converts the received signal into a baseband signal and outputs the baseband signal to baseband signal processing section 104 .

In the baseband signal processing unit 104, the user data included in the input UL signal, fast Fourier transform (FFT: Fast Fourier Transform) processing, inverse discrete Fourier transform (IDFT: Inverse Discrete Fourier Transform) processing, error correction Decoding, reception processing for MAC retransmission control, and reception processing for the RLC layer and PDCP layer are performed, and transferred to the upper station apparatus 30 via the transmission line interface 106 . The call processing unit 105 performs call processing such as communication channel setup and release, state management of the radio base station 10, and radio resource management.

The transmission line interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface. In addition, the transmission line interface 106 transmits and receives signals (backhaul signaling) to and from other radio base stations 10 via an interface between base stations (for example, an optical fiber conforming to CPRI (Common Public Radio Interface), an X2 interface). may

Note that the transmitting/receiving unit 103 may further include an analog beamforming unit that performs analog beamforming. The analog beamforming unit consists of an analog beamforming circuit (e.g., phase shifter, phase shift circuit) or an analog beamforming device (e.g., phase shifter) described based on common recognition in the technical field of the present invention. can do. Also, the transmitting/receiving antenna 101 can be configured by, for example, an array antenna. Further, the transmitting/receiving unit 103 is configured to be able to apply single BF and multi BF.

Transceiver 103 transmits DL signals (eg, NR-PDCCH / PDSCH, mobility measurement signals, CSI-RS, DMRS, DCI, at least one of DL data), UL signals (eg, PUCCH, PUSCH, recovery signals, measurement reports, beam reports, CSI reports, UCI, and/or UL data).

Also, the transmitting/receiving unit 103 transmits NR-PDCCH (DCI) in different time domains and/or frequency domains using multiple beams. The transmitting/receiving unit 103 may transmit DCI including timing information. The timing information may be any one of an offset value from a preset reference timing, an offset value from DCI reception timing, and information indicating an index of a predetermined scheduling unit. Also, the transmitting/receiving unit 103 may notify information about the reference timing.

FIG. 11 is a diagram showing an example of the functional configuration of a radio base station according to this embodiment. It should be noted that this example mainly shows the functional blocks that characterize the present embodiment, and that the radio base station 10 also has other functional blocks necessary for radio communication.

The baseband signal processing section 104 includes at least a control section (scheduler) 301 , a transmission signal generation section 302 , a mapping section 303 , a reception signal processing section 304 and a measurement section 305 . Note that these configurations need only be included in the radio base station 10, and some or all of the configurations need not be included in the baseband signal processing section 104. FIG.

A control unit (scheduler) 301 controls the entire radio base station 10 . The control unit 301 can be configured from a controller, a control circuit, or a control device that will be explained based on the common recognition in the technical field related to the present invention.

The control unit 301 controls signal generation by the transmission signal generation unit 302 and signal allocation by the mapping unit 303, for example. The control unit 301 also controls signal reception processing by the reception signal processing unit 304 and signal measurement by the measurement unit 305 .

The control unit 301 controls scheduling of DL data channels and UL data channels, and controls generation and transmission of DCIs (DL assignments) for scheduling DL data channels and DCIs (UL grants) for scheduling UL data channels. .

The control unit 301 uses digital BF (e.g., precoding) by the baseband signal processing unit 104 and/or analog BF (e.g., phase rotation) by the transmission/reception unit 103 to form Tx beams and/or Rx beams. to control. For example, the control unit 301 controls beams (Tx beams and/or Rx beams) used for transmission and/or reception of DL signals (eg, NR-PDCCH/PDSCH).

Transmission signal generation section 302 generates a DL signal based on an instruction from control section 301 and outputs the DL signal to mapping section 303 . The transmission signal generation unit 302 can be configured from a signal generator, a signal generation circuit, or a signal generation device, which will be described based on common recognition in the technical field of the present invention.

The transmission signal generator 302 generates DCI (DL assignment, UL grant) based on an instruction from the controller 301, for example. In addition, the DL data channel (PDSCH) is subjected to encoding processing, modulation processing, beamforming processing (precoding processing) according to the coding rate, modulation scheme, etc. determined based on the CSI from each user terminal 20. will be

Mapping section 303 maps the DL signal generated by transmission signal generation section 302 to a predetermined radio resource based on an instruction from control section 301 , and outputs the result to transmission/reception section 103 . The mapping unit 303 can be composed of a mapper, a mapping circuit, or a mapping device described based on common understanding in the technical field related to the present invention.

Received signal processing section 304 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the received signal input from transmitting/receiving section 103 . Here, the received signal is a UL signal transmitted from the user terminal 20, for example. The received signal processing unit 304 can be composed of a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field of the present invention.

Received signal processing section 304 outputs the information decoded by the reception processing to control section 301 . For example, when feedback information (eg, CSI, HARQ-ACK, etc.) is received from a user terminal, the feedback information is output to control section 301 . Received signal processing section 304 also outputs the received signal and the signal after receiving processing to measuring section 305 .

A measurement unit 305 performs measurements on the received signal. The measuring unit 305 can be configured from a measuring instrument, a measuring circuit, or a measuring device described based on common recognition in the technical field of the present invention.

Measurement section 305, for example, the received power of the received signal (for example, RSRP (Reference Signal Received Power)), reception quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio)) and channel You may measure about a state etc. A measurement result may be output to the control unit 301 .

<User terminal>
FIG. 12 is a diagram showing an example of the overall configuration of a user terminal according to this embodiment. The user terminal 20 includes a plurality of transmitting/receiving antennas 201 , an amplifier section 202 , a transmitting/receiving section 203 , a baseband signal processing section 204 and an application section 205 . Note that the transmission/reception antenna 201, the amplifier section 202, and the transmission/reception section 203 may be configured to include one or more.

A radio frequency signal received by the transmitting/receiving antenna 201 is amplified by the amplifier section 202 . The transmitting/receiving section 203 receives the DL signal amplified by the amplifier section 202 . Transmitting/receiving section 203 frequency-converts the received signal into a baseband signal and outputs the baseband signal to baseband signal processing section 204 . The transmitting/receiving section 203 can be composed of a transmitter/receiver, a transmitting/receiving circuit, or a transmitting/receiving device described based on common recognition in the technical field of the present invention. The transmitting/receiving section 203 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section.

The baseband signal processing unit 204 performs FFT processing, error correction decoding, reception processing for retransmission control, and the like on the input baseband signal. Downlink user data is transferred to the application unit 205 . The application unit 205 performs processing related to layers higher than the physical layer and the MAC layer. Also, among the downlink data, broadcast information is also transferred to the application section 205 .

On the other hand, uplink user data is input from the application section 205 to the baseband signal processing section 204 . In the baseband signal processing unit 204, transmission processing for retransmission control (for example, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, etc. are performed for transmission and reception. It is transferred to the unit 203 . The transmitting/receiving section 203 converts the baseband signal output from the baseband signal processing section 204 into a radio frequency band and transmits the radio frequency band signal. The radio frequency signal frequency-converted by the transmitting/receiving section 203 is amplified by the amplifier section 202 and transmitted from the transmitting/receiving antenna 201 .

Note that the transmitting/receiving unit 203 may further include an analog beamforming unit that performs analog beamforming. The analog beamforming unit consists of an analog beamforming circuit (e.g., phase shifter, phase shift circuit) or an analog beamforming device (e.g., phase shifter) described based on common recognition in the technical field of the present invention. can do. Also, the transmitting/receiving antenna 201 can be configured by, for example, an array antenna. Further, the transmitting/receiving unit 203 is configured to be able to apply single BF and multi BF.

Transceiver 203 receives DL signals (eg, NR-PDCCH / PDSCH, mobility measurement signals, CSI-RS, DMRS, DCI, at least one of DL data), UL signals (eg, PUCCH, PUSCH, recovery signals, measurement reports, beam reports, CSI reports, UCI, and/or UL data).

Further, the transmitting/receiving unit 203 selects one or more NR-PDCCHs (or NR-PDCCH candidates, NR-PDCCH candidate regions) transmitted in different time domains and/or frequency domains (one or more beams) in different time domains. and/or receive (monitor) in the frequency domain. The transceiver 203 may receive timing information included in the DCI. The timing information may be any one of an offset value from a preset reference timing, an offset value from DCI reception timing, and information indicating an index of a predetermined scheduling unit. Also, the transmitting/receiving section 203 may receive information about the reference timing.

FIG. 13 is a diagram showing an example of the functional configuration of a user terminal according to this embodiment. It should be noted that this example mainly shows the functional blocks that characterize the present embodiment, and that the user terminal 20 also has other functional blocks necessary for wireless communication.

The baseband signal processing section 204 of the user terminal 20 includes at least a control section 401 , a transmission signal generation section 402 , a mapping section 403 , a reception signal processing section 404 and a measurement section 405 . Note that these configurations need only be included in the user terminal 20 , and some or all of the configurations may not be included in the baseband signal processing section 204 .

The control unit 401 controls the user terminal 20 as a whole. The control unit 401 can be configured from a controller, a control circuit, or a control device, which will be explained based on common recognition in the technical field of the present invention.

The control unit 401 controls signal generation by the transmission signal generation unit 402 and signal allocation by the mapping unit 403, for example. Further, the control unit 401 controls signal reception processing by the reception signal processing unit 404 and signal measurement by the measurement unit 405 .

The control unit 401 acquires the DL control signal (DL control channel) and the DL data signal (DL data channel) transmitted from the radio base station 10 from the received signal processing unit 404 . The control unit 401 controls generation of a UL control signal (eg, acknowledgment information, etc.) and a UL data signal based on the DL control signal, the result of determining whether or not retransmission control is necessary for the DL data signal, and the like.

The control unit 401 uses digital BF (for example, precoding) by the baseband signal processing unit 204 and/or analog BF (for example, phase rotation) by the transmission/reception unit 203 to form a transmission beam and/or a reception beam. to control. For example, the control unit 401 controls beams (Tx beams and/or Rx beams) used for receiving DL signals (eg, NR-PDCCH/PDSCH).

The control unit 401 controls reception and/or transmission of data scheduled by DCI, and controls reception timing and/or transmission timing of data based on at least timing information included in DCI. When the timing information is an offset value from a preset reference timing, the control unit 401 controls the data reception timing and/or transmission timing based on the reference timing and the offset value (see FIG. 4-6). .

Alternatively, if the timing information is an offset value from the DCI reception timing, the control section 401 controls the data reception timing and/or transmission timing based on the DCI reception timing and offset value (see FIG. 7). Alternatively, if the timing information is information indicating the index of a predetermined scheduling unit, the control section 401 controls the data reception timing and/or transmission timing based on the information indicating the index (see FIG. 8).

In addition, when the control unit 401 detects multiple DCIs that schedule data for the same time resource, the control unit 401 controls data reception and/or transmission based on the first detected DCI and/or the last detected DCI. good too.

Transmission signal generation section 402 generates a UL signal (UL control signal, UL data signal, UL reference signal, etc.) based on an instruction from control section 401 and outputs it to mapping section 403 . The transmission signal generation unit 402 can be configured from a signal generator, a signal generation circuit, or a signal generation device, which will be described based on common recognition in the technical field of the present invention.

Transmission signal generation section 402 generates feedback information (eg, at least one of HARQ-ACK, CSI, and scheduling request) based on an instruction from control section 401, for example. Also, transmission signal generation section 402 generates an uplink data signal based on an instruction from control section 401 . For example, when the DL control signal notified from the radio base station 10 includes the UL grant, the transmission signal generation section 402 is instructed by the control section 401 to generate an uplink data signal.

Mapping section 403 maps the UL signal generated by transmission signal generating section 402 to radio resources based on an instruction from control section 401 , and outputs the result to transmitting/receiving section 203 . The mapping unit 403 can be composed of a mapper, a mapping circuit, or a mapping device described based on common understanding in the technical field related to the present invention.

Received signal processing section 404 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the received signal input from transmitting/receiving section 203 . Here, the received signal is, for example, a DL signal (DL control signal, DL data signal, downlink reference signal, etc.) transmitted from the radio base station 10 . The received signal processing unit 404 can be composed of a signal processor, a signal processing circuit, or a signal processing device, which are explained based on the common recognition in the technical field related to the present invention. Also, the received signal processing section 404 can constitute a receiving section according to the present invention.

Received signal processing section 404 outputs the information decoded by the reception processing to control section 401 . Received signal processing section 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, etc. to control section 401 . Received signal processing section 404 also outputs the received signal and the signal after receiving processing to measuring section 405 .

A measurement unit 405 performs measurements on the received signal. For example, the measurement section 405 performs measurement using mobility measurement signals and/or CSI-RS resources transmitted from the radio base station 10 . The measuring unit 405 can be configured from a measuring instrument, a measuring circuit, or a measuring device described based on common recognition in the technical field of the present invention.

The measuring section 405 may measure, for example, the received power of the received signal (for example, RSRP), the received quality (for example, RSRQ, received SINR), the channel state, and the like. A measurement result may be output to the control unit 401 .

<Hardware configuration>
It should be noted that the block diagrams used in the description of the above embodiments show blocks in units of functions. These functional blocks (components) are implemented by any combination of hardware and/or software. Further, means for realizing each functional block is not particularly limited. That is, each functional block may be implemented by one device physically and/or logically coupled, or may be implemented by two or more physically and/or logically separated devices directly and/or indirectly. These multiple devices may be physically connected (eg, wired and/or wirelessly).

For example, a radio base station, a user terminal, etc. in one embodiment of the present invention may function as a computer that performs processing of the radio communication method of the present invention. FIG. 14 is a diagram showing an example of hardware configurations of a radio base station and a user terminal according to one embodiment of the present invention. The radio base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. good.

Note that in the following description, the term "apparatus" can be read as a circuit, device, unit, or the like. The hardware configuration of the radio base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.

For example, although only one processor 1001 is shown, there may be multiple processors. Also, processing may be performed by one processor, or processing may be performed concurrently, serially, or otherwise by one or more processors. Note that the processor 1001 may be implemented with one or more chips.

Each function in the radio base station 10 and the user terminal 20 is, for example, by loading predetermined software (program) on hardware such as a processor 1001 and a memory 1002, the processor 1001 performs calculations, and communication is performed by the communication device 1004. and controlling reading and/or writing of data in the memory 1002 and the storage 1003 .

The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, the above-described baseband signal processing unit 104 (204), call processing unit 105, and the like may be realized by the processor 1001. FIG.

The processor 1001 also reads programs (program codes), software modules, data, etc. from the storage 1003 and/or the communication device 1004 to the memory 1002, and executes various processes according to them. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. For example, the control unit 401 of the user terminal 20 may be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks may be similarly implemented.

The memory 1002 is a computer-readable recording medium, such as ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically EPROM), RAM (Random Access Memory), and at least other suitable storage media. It may consist of one. The memory 1002 may also be called a register, cache, main memory (main storage device), or the like. The memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to an embodiment of the present invention.

The storage 1003 is a computer-readable recording medium, such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may consist of Storage 1003 may also be called an auxiliary storage device.

The communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via a wired and/or wireless network, and is also called a network device, network controller, network card, communication module, or the like. Communication device 1004 includes high frequency switches, duplexers, filters, frequency synthesizers, etc., for example, to implement Frequency Division Duplex (FDD) and/or Time Division Duplex (TDD). may be configured. For example, the transmitting/receiving antenna 101 (201), the amplifier section 102 (202), the transmitting/receiving section 103 (203), the transmission path interface 106, and the like described above may be realized by the communication device 1004. FIG.

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

Devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information. The bus 1007 may be composed of a single bus, or may be composed of different buses between devices.

In addition, the radio base station 10 and the user terminal 20 are microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), FPGAs (Field Programmable Gate Arrays), etc. It may be configured including hardware, and part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented with at least one of these hardware.

(Modification)
The terms explained in this specification and/or terms necessary for understanding this specification may be replaced with terms having the same or similar meanings. For example, channels and/or symbols may be signals. A signal may also be a message. The reference signal may be abbreviated as RS (Reference Signal), or may be called a pilot, a pilot signal, etc. according to the applicable standard. A component carrier (CC: Component Carrier) may also be called a cell, a frequency carrier, a carrier frequency, or the like.

A radio frame may also consist of one or more periods (frames) in the time domain. Each of the one or more periods (frames) that make up a radio frame may be called a subframe. Furthermore, a subframe may consist of one or more slots in the time domain. A subframe may be of a fixed length of time (eg, 1 ms) independent of neumerology.

Furthermore, a slot may consist of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain. A slot may also be a unit of time based on numerology. A slot may also include multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot.

Radio frames, subframes, slots, minislots and symbols all represent units of time in which signals are transmitted. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations. For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, and one slot or minislot may be called a TTI. may That is, the subframe and / or TTI may be a subframe (1 ms) in existing LTE, may be a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms There may be. Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.

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

The TTI may be a unit of transmission time for channel-encoded data packets (transport blocks), code blocks, and/or codewords, or may be a unit of processing such as scheduling and link adaptation. Note that when a TTI is given, the actual time interval (eg number of symbols) to which the transport blocks, code blocks and/or codewords are mapped may be shorter than the TTI.

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

A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, or the like. A TTI that is shorter than a normal TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, or a subslot.

Note that the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms, and the short TTI (e.g., shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms A TTI having the above TTI length may be read instead.

A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. Also, an RB may contain one or more symbols in the time domain and may be 1 slot, 1 minislot, 1 subframe or 1 TTI long. One TTI and one subframe may each consist of one or a plurality of resource blocks. Note that one or more RBs are physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, and the like. may be called.

Also, a resource block may be composed of one or more resource elements (RE: Resource Element). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

It should be noted that the above structures such as radio frames, subframes, slots, minislots and symbols are only examples. For example, the number of subframes contained in a radio frame, the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers, the number of symbols in a TTI, the symbol length, the Cyclic Prefix (CP) length, etc. can be varied.

In addition, the information, parameters, etc. described in this specification may be represented by absolute values, may be represented by relative values from a predetermined value, or may be represented by corresponding other information. . For example, radio resources may be indicated by a predetermined index. Further, the formulas and the like using these parameters may differ from those explicitly disclosed herein.

The names used for parameters and the like in this specification are not limiting in any way. For example, various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements can be identified by any suitable name, so that various Names are not limiting in any way.

Information, signals, etc. described herein may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of

Also, information, signals, etc. may be output from higher layers to lower layers and/or from lower layers to higher layers. Information, signals, etc. may be input and output through multiple network nodes.

Input/output information, signals, and the like may be stored in a specific location (for example, memory), or may be managed in a management table. Input and output information, signals, etc. may be overwritten, updated or appended. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to other devices.

Notification of information is not limited to the aspects/embodiments described herein and may be done in other ways. For example, notification of information includes physical layer signaling (e.g., downlink control information (DCI: Downlink Control Information), uplink control information (UCI: Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling), other signals or a combination thereof.

The physical layer signaling may also be called L1/L2 (Layer 1/Layer 2) control information (L1/L2 control signal), L1 control information (L1 control signal), or the like. The RRC signaling may also be called an RRC message, such as an RRC connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like. Also, MAC signaling may be notified by, for example, a MAC control element (MAC CE (Control Element)).

In addition, notification of predetermined information (for example, notification of “being X”) is not limited to explicit notification, but is implicitly performed (for example, by not notifying the predetermined information or otherwise information).

The determination may be made by a value (0 or 1) represented by 1 bit, or by a boolean value represented by true or false. , may be performed by numerical comparison (eg, comparison with a predetermined value).

Software, whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

Software, instructions, information, etc. may also be sent and received over a transmission medium. For example, the software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to create websites, servers, etc. , or other remote source, these wired and/or wireless technologies are included within the definition of transmission media.

As used herein, the terms "system" and "network" are used interchangeably.

As used herein, “base station (BS),” “radio base station,” “eNB,” “gNB,” “cell,” “sector,” “cell group,” “carrier,” and “component carrier ' can be used interchangeably. A base station may also be called a fixed station, a NodeB, an eNodeB (eNB), an access point, a transmission point, a reception point, a femtocell, a small cell, and other terms.

A base station may serve one or more (eg, three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being associated with a base station subsystem (e.g., an indoor small base station (RRH: The term "cell" or "sector" may refer to part or all of the coverage area of a base station and/or base station subsystem serving communication services in such coverage. Point.

The terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)" and "terminal" may be used interchangeably herein. A base station may also be called a fixed station, a NodeB, an eNodeB (eNB), an access point, a transmission point, a reception point, a femtocell, a small cell, and other terms.

A mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called a terminal, remote terminal, handset, user agent, mobile client, client or some other suitable term.

Also, the radio base station in this specification may be read as a user terminal. For example, each aspect/embodiment of the present invention may be applied to a configuration in which communication between a radio base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device). In this case, the user terminal 20 may have the functions of the radio base station 10 described above. Also, words such as "up" and "down" may be read as "side". For example, an uplink channel may be read as a side channel.

Similarly, user terminals in this specification may be read as radio base stations. In this case, the radio base station 10 may have the functions of the user terminal 20 described above.

In this specification, a specific operation performed by a base station may be performed by its upper node. In a network consisting of one or more network nodes with a base station, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (e.g., Obviously, it can be performed by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc. (but not limited to these) or a combination thereof.

Each aspect/embodiment described herein may be used alone, in combination, or switched between implementations. Also, the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described herein may be rearranged as long as there is no contradiction. For example, the methods described herein present elements of the various steps in a sample order, and are not limited to the specific order presented.

Each aspect/embodiment described herein supports Long Term Evolution (LTE), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (Registered Trademark) (Global System for Mobile Communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (Registered Trademark)), IEEE 802.16 (WiMAX (Registered Trademark)), IEEE 802 .20, Ultra-WideBand (UWB), Bluetooth, or other suitable wireless communication methods, and/or extended next-generation systems based on these.

As used herein, the phrase "based on" does not mean "based only on," unless expressly specified otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

Any reference to elements using the "first," "second," etc. designations used herein does not generally limit the quantity or order of those elements. These designations may be used herein as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not imply that only two elements may be employed or that the first element must precede the second element in any way.

As used herein, the term "determining" may encompass a wide variety of actions. For example, "determining" means calculating, computing, processing, deriving, investigating, looking up (e.g., in a table, database or other data searching in the structure), ascertaining, etc. may be considered to be "determining". Also, "determining (deciding)" includes receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access ( accessing (e.g., accessing data in memory), etc. Also, "determining" is considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. good too. That is, "determining (determining)" may be regarded as "determining (determining)" some action.

As used herein, the terms "connected", "coupled", or any variation thereof, refer to any connection or connection, direct or indirect, between two or more elements. A connection is meant and can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other. Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used herein, two elements are referred to by the use of one or more wires, cables and/or printed electrical connections and, as some non-limiting and non-exhaustive examples, radio frequency They can be considered to be “connected” or “coupled” together through the use of electromagnetic energy, etc., having wavelengths in the microwave, microwave and/or optical (both visible and invisible) regions.

Where "including," "comprising," and variations thereof are used in the specification or claims, these terms, as well as the term "comprising," refer to the inclusive intended to be Furthermore, the term "or" as used in this specification or the claims is not intended to be an exclusive OR.

Although the present invention has been described in detail above, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented with modifications and variations without departing from the spirit and scope of the invention defined by the claims. Accordingly, the descriptions herein are for the purpose of illustration and description, and are not intended to have any limiting meaning with respect to the present invention.

Claims (6)

a receiver that receives downlink control information and a downlink shared channel scheduled with the downlink control information;
a control unit that determines allocation of the downlink shared channel in the time domain based on a first timing specified by a slot and a second timing specified by a symbol obtained from information notified by the downlink control information; , has
The control unit determines a slot in which the downlink shared channel is scheduled based on a slot in which the downlink control information is transmitted and an offset value obtained from information notified in the downlink control information, determining a symbol to which the downlink shared channel is allocated based on the notified information;
The terminal, wherein the first timing is based on a newerology of the downlink shared channel. The control unit determines a symbol to which the downlink shared channel is allocated based on information notified by the downlink control information, using the beginning of the slot in which the downlink shared channel is scheduled as a reference timing. A terminal according to claim 1 . a receiving unit that receives downlink control information used for scheduling the uplink shared channel;
a control unit that determines allocation of the uplink shared channel in the time domain based on a first timing specified by a slot and a second timing specified by a symbol obtained from information notified by the downlink control information; , has
The control unit determines a slot in which the uplink shared channel is scheduled based on a slot in which the downlink control information is transmitted and an offset value obtained from information notified in the downlink control information, determining a symbol to which the uplink shared channel is allocated based on the notified information;
The terminal, wherein the first timing is based on a numerology of the uplink shared channel. The control unit determines a symbol to which the uplink shared channel is allocated based on information notified by the downlink control information, using the head of the slot in which the downlink shared channel is scheduled as a reference timing. A terminal according to claim 3. receiving downlink control information and a downlink shared channel scheduled with the downlink control information;
determining allocation of the downlink shared channel in the time domain based on a first timing specified by a slot and a second timing specified by a symbol obtained from information included in the downlink control information; have
The step of determining the allocation includes determining a slot in which the downlink shared channel is scheduled based on an offset value obtained from a slot in which the downlink control information is transmitted and information notified by the downlink control information, determining a symbol to which the downlink shared channel is allocated based on information notified by control information;
The wireless communication method, wherein the first timing is based on a newerology of the downlink shared channel. a transmission unit that transmits downlink control information and a downlink shared channel scheduled with the downlink control information;
a control unit that controls allocation of the downlink shared channel in the time domain based on a first timing specified by a slot and a second timing specified by a symbol obtained from information notified by the downlink control information. death,
The control unit schedules the downlink shared channel in a slot corresponding to an offset value obtained from a slot for transmitting the downlink control information and information to be notified by the downlink control information, and corresponds to information to be notified by the downlink control information. assigning the downlink shared channel to a symbol to
The radio base station , wherein the first timing is based on numerology of the downlink shared channel .

Images