JP6955611B2 - Terminals, wireless communication methods and wireless base stations - Google Patents

Description

The present invention relates to terminals, wireless communication methods and wireless base stations in next-generation mobile communication systems.

In the UMTS (Universal Mobile Telecommunications System) network, Long Term Evolution (LTE) has been specified for the purpose of further high-speed data rate, low delay, and the like (Non-Patent Document 1). In addition, LTE-A (LTE Advanced, also referred to as LTE Rel.10, 11 or 12) has been specified for the purpose of further widening and speeding up from LTE (also referred to as LTE Rel.8 or 9), and LTE. Successor system (for example, 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 (Also called after 15) is also being considered.

LTE Rel. On October 11, carrier aggregation (CA: Carrier Aggregation) that integrates a plurality of component carriers (CC: Component Carriers) has been introduced in order to widen the bandwidth. Each CC is an LTE Rel. The system band of 8 is configured as one unit. Further, in CA, a plurality of CCs of the same radio base station (eNB: eNodeB) are set in the user terminal (UE: User Equipment).

On the other hand, LTE Rel. In 12, a dual connectivity (DC) in which a plurality of cell groups (CG: Cell Group) of different radio base stations are set in the UE is also introduced. Each cell group is composed of at least one cell (CC). In DC, since a plurality of CCs of different radio base stations are integrated, DC is also called an inter-base station CA (Inter-eNB CA) or the like.

In an existing LTE system (eg, LTE Rel. 8-13), the user terminal is a downlink (DL) control channel (eg, PDCCH: Physical Downlink Control Channel, EPDCCH: Enhanced Physical Downlink Control Channel, MPDCCH: MTC (Machine). type communication) Receives downlink control information (DCI) via Physical Downlink Control Channel, etc.). The user terminal receives the DL data channel (for example, PDSCH: Physical Downlink Shared Channel) and / or transmits the UL data channel (for example, PUSCH: Physical Uplink Shared Channel) at a 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 (for example, 5G, NR), in order to realize high speed and large capacity (for example, eMBB: enhanced Mobile Broad Band), a frequency band higher than the existing frequency band (for example, 3 to 40 GHz, etc.) ) Is being considered. In general, the higher the frequency band, the greater the distance attenuation, making it difficult to ensure coverage. Therefore, MIMO (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, a beam (antenna directivity) can be formed by controlling the amplitude and / or phase of the signal transmitted or received by each antenna element (Beam Forming (BF)). .. For example, when the antenna elements are arranged two-dimensionally, the number of antenna elements that can be arranged in a predetermined area (the number of antenna elements) increases as the frequency increases. As the number of antenna elements per predetermined area increases, the beam width becomes narrower, so that the beamforming gain increases. Therefore, when beamforming is applied, propagation loss (path loss) can be reduced and coverage can be ensured even in a high frequency band.

On the other hand, when beamforming is applied, the beam may be deteriorated due to blockage due to obstacles and / or the link may be interrupted (beam failure), and the communication quality may be deteriorated.

Therefore, the robustness of the DL control channel is ensured by transmitting the DL control channel (also referred to as NR-PDCCH or the like) using a plurality of different time domains and / or frequency domains (one or more beams). Is being considered. However, when transmitting a DL control channel using a plurality of different time domains and / or frequency domains (one or more beams), the user terminal appropriately schedules data scheduled in the DL control channel (DCI). There is a risk that it cannot be grasped.

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

The terminal according to one aspect of the present invention is designated by a receiving unit that receives downlink control information and a downlink shared channel scheduled by the downlink control information, and a slot obtained from the information notified by the downlink control information. It has a control unit that determines the allocation of the downlink shared channel in the time domain based on the timing of 1 and the second timing specified by the symbol, and the control unit transmits the downlink control information. A predetermined slot to which the downlink shared channel is scheduled is determined based on the slot and the offset value obtained from the information notified by the downlink control information, and the downlink shared channel is set based on the information notified by the downlink control information. It is characterized by determining the symbol to be assigned.

According to the present invention, the scheduling timing of data scheduled on the DL control channel (DCI) can be appropriately grasped.

It is a figure which shows an example of BPL. 2A and 2B are diagrams showing an example of monitoring of NR-PDCCH. 3A and 3B are diagrams showing other examples of monitoring NR-PDCCH. 4A and 4B are diagrams showing an example of a data scheduling timing control method. It is a figure which shows another example of the control method of the data scheduling timing. It is a figure which shows another example of the control method of the data scheduling timing. It is a figure which shows another example of the control method of the data scheduling timing. It is a figure which shows another example of the control method of the data scheduling timing. It is a figure which shows an example of the schematic structure of the wireless communication system which concerns on this embodiment. It is a figure which shows an example of the whole structure of the radio base station which concerns on this embodiment. It is a figure which shows an example of the functional structure of the radio base station which concerns on this 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 the functional structure of the user terminal which concerns on this embodiment. It is a figure which shows an example of the hardware composition of the radio base station and the user terminal which concerns on this embodiment.

In future wireless communication systems (eg 5G, NR), high speed and large capacity (eg eMBB), ultra-large number terminals (eg massive MTC (Machine Type Communication)), ultra-reliable and low latency (eg URLLC (eg URLLC) Use cases such as Ultra Reliable and Low Latency Communications)) are envisioned. Assuming these use cases, for example, in future wireless communication systems, it is considered to perform communication using beamforming (BF).

Beamforming (BF) includes digital BF and analog beam BF. Digital BF is a method of performing precoding signal processing (on a digital signal) 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, as many beams as the number of RF chains can be formed at any timing.

Analog BF is a method of using a phase shifter on RF. In this case, since the phase of the RF signal is only rotated, the configuration is easy and can be realized at low cost, but it is not possible to form a plurality of beams at the same timing. Specifically, in analog BF, only one beam can be formed at a time for each phase shifter.

Therefore, a radio base station (for example, called a gNB (gNodeB), a transmission / reception point (Transmission and Reception Point (TRP)), an eNB (eNodeB), a base station (Base Station (BS)), etc.) has one phase shifter. If only one is present, only one beam can be formed at a given time. Therefore, when transmitting a plurality of beams using only the analog BF, it is not possible to transmit a plurality of beams at the same time with the same resource, so it is necessary to switch or rotate the beams in time.

It is also possible to have a hybrid BF configuration in which a digital BF and an analog BF are combined. In future wireless communication systems (for example, 5G, NR), the introduction of MIMO (for example, Massive MIMO) using a large number of antenna elements is being considered, but if a huge number of beams are formed only by digital BF, , The circuit configuration may be expensive. Therefore, it is expected that hybrid BF will be used in future wireless communication systems.

When the above BF (including digital BF, analog BF, hybrid BF) is applied, the beam quality due to blockage due to obstacles (for example, received power (for example, RSSI: Received Signal Strength Indicator and / or)). RSRP: Reference Signal Received Power, etc.) and / or reception quality (eg, Signal-to-Noise Ratio (SNR), Signal-to-Interference plus Noise Power Ratio (SINR)) And RSRQ: at least one of the Reference Signal Received Quality)) and / or link interruption (beam failure) may occur, especially in the high frequency band. When it is used, there is a high possibility that the communication quality will be deteriorated due to the influence of obstacles and the like.

Therefore, in order to ensure the robustness of the beam, a plurality of DL control channels (also referred to as NR-PDCCH) that schedule the same data by utilizing different time resources and / or frequency resources are used for a plurality of beams. It is also being considered to use and transmit. The user terminal monitors the NR-PDCCH transmitted using the plurality of beams with different time resources and / or frequency resources.

The plurality of beams applied to the NR-PDCCH may be a plurality of transmission beams or reception beams, or may be a plurality of beam pair links (BPLs). The beam pair link (BPL) is a beam (also referred to as a transmission beam, a Tx beam, etc.) used for transmitting a signal (for example, the base station side) and a beam used for receiving the signal (for example, the UE side) (for example, the UE side). It corresponds to a combination of a reception 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 a signal for mobility measurement (signal for mobility measurement) using one or more beams (here, B1 to B3). In FIG. 1, the user terminal receives reception power (eg, RSSI and / or RSRP) and / or reception quality (eg, at least one of RSRQ, SNR, and SINR) of the mobility measurement signal associated with beams B1 to B3. To measure. The user terminal transmits a measurement report (MR: Measurement Report) indicating one or more beam identifiers (also referred to as beam ID, beam index (BI), etc.) and / or 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 the measurement result to the radio base station. good.

The radio base station determines Tx beams B21 to 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 to # 4, respectively associated with the Tx beams B21 to B24 or the BPL composed of the respective Tx beams and the corresponding Rx beams, 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 result and report the CSI for the Tx beams or BPLs to the radio base station. In addition, the user terminal may determine an Rx beam suitable for each selected Tx beam and determine a beam pair link (BPL). Further, the user terminal may report one or more determined BPLs to the radio base station.

FIG. 1 shows a case where Tx beam B23 and Rx beam b3 are selected as the best BPL, and Tx beam B22 and Rx beam b2 are selected as the second best BPL. A predetermined BPL may be selected in the radio base station based on the report from the user terminal, and the predetermined BPL may be notified to the user terminal by higher layer signaling or MAC signaling. Further, the BPL and the radio resource (predetermined frequency resource and / or time resource) may be set in association with each other. In this case, if the association information between the BPL and the radio resource is notified (installed) from the radio base station to the user terminal. good.

The radio base station may transmit the NR-PDCCH using M (M ≧ 1) Tx beams (or BPL) determined based on the CSI from the user terminal. The user terminal may monitor (blind decode) the NR-PDCCH with at least one of the M BPLs. The user terminal may monitor the NR-PDCCH with all of the M BPLs, or may monitor the NR-PDCCH with a part of the M BPLs. The maximum value of M may be determined based on the ability of the user terminal.

The user terminal may monitor the NR-PDCCH transmitted by one or more beams (BPL or Tx beam) transmitted by one or more time resources and / or frequency resources. In addition, the user terminal may monitor the NR-PDCCH of a certain beam at a shorter cycle than that of another beam. Further, the monitoring of the NR-PDCCH over a plurality of time resources may be applied when the user terminal does not have a plurality of RF chains (antenna ports).

The unit of the time resource corresponding to the different beams may be one or more slots (or mini slots) or one or more symbols. Further, the unit of the frequency resource corresponding to the different beam is one or more resource blocks (RB), one or more resource element groups (REG), one or more REG groups, one or more control channel elements (CCE), or the like. May be. Here, the REG group is composed of a plurality of REGs. The REG is composed of a plurality of resource elements (RE). RE is composed of one symbol and one subcarrier.

In this way, by transmitting a plurality of NR-PDCCHs that schedule predetermined data using different beams (for example, BPL), even if a certain beam is deteriorated, the user terminal can use the NR-PDCCH corresponding to the other beam. PDCCH can be received. By transmitting NR-PDCCH using a plurality of beams, it is possible to suppress deterioration of the communication product rate due to blockage due to obstacles.

By the way, in the existing LTE system, when the user terminal receives the DL control channel (DCI) for scheduling data, the user terminal transmits / receives data after a predetermined timing. For example, when a DCI (also called a UL grant) instructing UL transmission is received, the user terminal performs UL transmission after a predetermined timing (for example, after 4 ms). Further, when a DCI (also called a DL grant or DL assignment) instructing DL transmission is received, the user terminal performs DL reception in the same subframe. As described above, in the existing LTE system, when the DL control channel is received, transmission / reception is controlled at a predetermined scheduling timing.

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

Therefore, when monitoring a plurality of NR-PDCCHs (DCIs) transmitted using different beams, the present inventors detect the data instead of scheduling the data after a predetermined timing from the detection of the DCI. It was found that the DCI was included with at least information indicating the timing of data scheduling. With this configuration, even when the NR-PDCCH (DCI) that schedules the data of the same time resource is transmitted by different time resources, the user terminal appropriately grasps the data scheduling timing based on the information notified by the DCI. It becomes possible to do.

Hereinafter, the present embodiment will be described in detail with reference to the drawings. Although the beamforming in the present embodiment assumes a digital BF, it can be appropriately applied to an analog BF and a 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, a Tx beam, etc.) and / or a beam used for receiving a DL signal at a user terminal. (Also referred to as a received beam, an Rx beam, etc.) may be included. Alternatively, a beam used for transmitting a UL signal from a user terminal (also referred to as a transmission beam, Tx beam, etc.) and / or a beam used for receiving a UL signal at a radio base station (also referred to as a reception beam, Rx beam, etc.) It may be included. The combination of Tx beam and Rx beam may be referred to as beam pair link (BPL) or the like.

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

One NR-PDCCH may transmit and receive with a plurality of time resources and / or frequency resources associated with one beam, or may transmit and receive with a plurality of time resources and / or frequencies associated with a plurality of beams. Transmission and reception may be controlled by resources.

When a single NR-PDCCH is transmitted / received by a plurality of time resources and / or frequency resources associated with a plurality of beams, the NR-PDCCH is divided and allocated to a plurality of time resources and / or frequency resources. You may. Alternatively, the NR-PDCCH may be duplicated (the same NR-PDCCH is repeatedly generated) and allocated to a plurality of time resources and / or frequency resources. With reference to FIGS. 2 and 3, the NR-PDCCH in which transmission / reception is performed by a plurality of beams will be described in detail. Although only the Tx beam is shown in FIGS. 2 and 3, the Rx beam (or BPL) corresponding to the Tx beam may be used.

In FIG. 2, a single NR-PDCCH is composed of (divided into) a plurality of coded data, and the plurality of coded data are transmitted using a plurality of different beams. For example, FIGS. 2A and 2B show an example in which a single NR-PDCCH corresponds to a plurality of 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, the 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, when a single NR-PDCCH is monitored by M beams, if the coding rate of the NR-PDCCH is 1 / M or less, the user terminal is theoretically a user terminal. The NR-PDCCH can be restored by detecting one of the M beams.

FIG. 3 is a diagram showing another example of NR-PDCCH transmitted (base station side) and monitored (UE side) by a plurality of beams. In FIG. 3, the same NR-PDCCH is repeated (replicated), and a plurality of duplicated NR-PDCCHs are transmitted using a plurality of different beams. The repetition duplicates the DCI before error correction coding (after CRC addition), performs error correction coding, rate matching, and data modulation for each, generates NR-PDCCH for each, and then differs from each other. It may be transmitted using a beam, or 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 an example in which the same NR-PDCCH is repeated a plurality of 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 a plurality of repeated NR-PDCCHs are monitored by M beams, the plurality of NR-PDCCHs are also referred to as different candidate resources (NR-PDCCH candidates, etc.) in the same search space. It may be placed in a candidate resource in a different search space.

As shown in FIGS. 3A and 3B, when a plurality of repeated NR-PDCCHs are monitored by M beams, the user terminal can restore the NR-PDCCH by detecting one of the M beams. When detecting a plurality of beams, the user terminal may synthesize a plurality of NR-PDCCHs.

It should be noted that a plurality of repeated NR-PDCCHs can also be transmitted with the same beam. When a plurality of repeated NR-PDCCHs are transmitted by the same beam, the channel estimates obtained by using each RS corresponding to the plurality of NR-PDCCHs can be averaged / filtered to improve the channel estimation accuracy. .. Alternatively, when a plurality of repeated NR-PDCCHs are transmitted by the same beam, RS corresponding to only one or a part of the plurality of NR-PDCCHs may be transmitted. In this case, RS overhead can be reduced and performance can be improved. When multiple NR-PDCCHs that are repeated in different beams are transmitted, it is desirable to independently estimate and demodulate the channels using the RS corresponding to each beam.

The user terminal may set the information as to whether or not the channel estimates obtained by the respective RSs corresponding to the plurality of repeated NR-PDCCHs can be averaged / filtered by the upper layer signaling. Alternatively, the user terminal can estimate the channels obtained at each RS corresponding to the repeated NR-PDCCHs, regardless of whether the repeated NR-PDCCHs are transmitted by the same beam or different beams. The values may be channel-estimated independently without averaging / filtering. As described above, information such as whether the transmitted beams for a plurality of repeated NR-PDCCHs are the same or different, and if they are different, how they are different should be appropriately controlled even if the user terminal does not necessarily identify them. Is possible.

When the NR-PDCCH is transmitted using a plurality of beams, the user terminal demodulates each NR-PDCCH by using a predetermined demodulation reference signal for each beam. At this time, the channel estimation may be performed without averaging between different beams. By estimating the channel for each beam, the channel state for each beam can be accurately grasped.

(Second aspect)
In the second aspect, DL data reception and / or UL data is received using the timing information included in the downlink control information (DCI) transmitted on the DL control channel (for example, NR-PDCCH) and a predetermined reference timing. The case of controlling the transmission of is described.

The user terminal recognizes the reception timing and / or the transmission timing of the data scheduled by the DCI by using the timing information included in the DCI transmitted by the detected NR-PDCCH and a predetermined reference timing set in advance. .. 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 the predetermined bit information using DCI, a predetermined offset value is set to the user terminal. You may notify. Further, a plurality of offset value candidates may be defined as fixed values, or may be appropriately set by using upper layer signaling or the like.

The offset value is specified in a predetermined time unit (for example, a scheduling unit). For example, the offset value is defined by the number of OFDM symbols or the number of sets of OFDM symbols. A set of OFDM symbols consists of a combination of multiple OFDM symbols. Alternatively, the offset value may be specified by the number of mini-slots or the number of sets of mini-slots. A set of mini-slots consists of a combination of multiple mini-slots. Alternatively, the offset value may be specified by the number of slots or the number of sets of slots. A set of slots consists of a combination of multiple slots.

Further, the offset value may be defined by combining at least two of a plurality of scheduling units (OFDM symbols, mini-slots, slots, etc.). Further, the offset value may be specified by using different scheduling units for the scheduling of DL data and the scheduling of UL data. For example, the offset value included in the DCI that schedules DL data may be specified by a symbol and / or a mini-slot, and the offset value included in the DCI that schedules UL data may be specified by a slot. Of course, it is not limited to this.

The reference timing is set in the user terminal in advance and serves as a reference when applying the offset value notified by DCI. The reference timing may be fixedly set by specifications or the like, or may be set from the radio base station to the user terminal by using higher layer signaling (for example, RRC signaling, broadcast information) or the like. As an example, the head of a predetermined scheduling unit (for example, a slot) may be defined as a 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 a plurality of DCIs (for example, NR-PDCCH corresponding to different BPLs) that schedule the same data are transmitted with different time resources, the offset value included in each DCI is the same.

The user terminal may control the data reception timing and / or the data transmission timing on the assumption that the plurality of NR-PDCCHs (DCIs) that schedule the same data include the same offset value. NR-PDCCHs that schedule the same data are transmitted, for example, with different beam (eg, BPL) applied and with different frequency and / or time resources. The user terminal monitors (monitors) the NR-PDCCH (which may be referred to as an NR-PDCCH candidate or a search space) to which a different beam is applied and receives the DCI. The NR-PDCCH monitored by the user terminal may be set in advance from 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 to the reference timing. The reference timing is not limited to the beginning of the slot. Further, although FIG. 4 shows a case where the reception of DL data is controlled, 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). The slot is composed of 6 mini-slots (# 0- # 5), and each mini-slot is composed of 3, 2, 2, 2, 2, and 3 symbols in the time direction. Applicable slot configurations and mini-slot configurations are not limited to this. For example, the mini-slot may have a configuration of 2, 2, 2, 2, 2, 2, 2 symbols in the slot in the time direction, or may have a configuration of 2, 3, 2, 2, 2, 3. Alternatively, the number of symbols per minislot may be further composed of different numbers of symbols. One mini-slot may be spread across two slots.

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

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

The radio base station transmits the DCI # 1 that schedules the data # 1 including an offset value corresponding to 7 symbols + 8 symbols (or 3 mini slots). Further, the radio base station transmits the DCI # 2 that schedules the data # 2 including an offset value corresponding to 9 symbols + 10 symbols (or 4 mini slots).

When data is assigned to multiple scheduling units (eg, multiple symbols and / or multiple minislots, etc.), the offset value may include all the periods during which the data is allocated, or only some (eg, data). The allocation start position and / or end position) may be included in the offset value for notification. The user terminal can recognize the reception timings of the data # 1 and the data # 2, respectively, based on the offset values and the reference timings included in the DCI # 1 and DCI # 2.

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

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

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

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

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

Although FIG. 5 shows a case where data scheduling is controlled by 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 may be set to 0. Further, although FIG. 5 shows a case where the offset value is notified in slot units, information in symbol and / or mini slot units may be included in the offset value in addition to the slot for notification. As a result, when performing cross-slot scheduling, data allocation can be controlled in units of symbols and / or mini-slots.

FIG. 6 shows a case where a plurality of NR-PDCCHs (DCIs) that schedule data of the same time resource (for example, the same data) are assigned to different time resources. FIG. 6 shows a case where the NR-PDCCH (DCI) that schedules the data transmitted in the symbols # 7 and # 8 (mini slot # 3) is transmitted in the symbol # 0 and the symbol # 1, respectively. The same or different beams (for example, BPL) are applied to the NR-PDCCH (DCI) transmitted by the symbol # 0 and the symbol # 1, respectively.

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

When the user terminal detects at least one NR-PDCCH, the user terminal may stop the detection of the NR-PDCCH of the other beam. By such an operation, the processing load of the user terminal can be reduced. Alternatively, when the user terminal receives a plurality of NR-PDCCHs (DCIs), the plurality of DCIs may be combined (combined) to control the reception and / or transmission of data.

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

(Third aspect)
In the third aspect, the reception of DL data and / or the transmission of UL data is controlled by using the timing information included in the DCI transmitted on the DL control channel (for example, NR-PDCCH) and the reception timing of the DCI. The case of doing so will be described.

The user terminal controls the reception timing and / or the transmission timing of the data scheduled by the DCI by using the timing information included in the detected NR-PDCCH (DCI) and the detection timing of the NR-PDCCH. The timing information included in the DCI may be an offset value from the detection timing of the 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 the predetermined bit information using DCI, a predetermined offset value is set to the user terminal. You may notify. Further, a plurality of offset value candidates may be defined as fixed values, or may be appropriately set by using upper layer signaling or the like.

The offset value is specified in a predetermined time unit (for example, a 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 specified by the number of mini-slots or the number of sets of mini-slots. Alternatively, the offset value may be specified by the number of slots or the number of sets of slots.

Further, the offset value may be defined by combining at least two of a plurality of scheduling units (OFDM symbols, mini-slots, slots, etc.). Further, the offset value may be specified by using different scheduling units for the scheduling of DL data and the scheduling of UL data. For example, the offset value included in the DCI that schedules DL data may be specified by a symbol and / or a mini-slot, and the offset value included in the DCI that schedules UL data may be specified by a slot. Of course, it is not limited to this.

When a plurality of NR-PDCCHs (DCIs) that schedule 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 a plurality of DCIs scheduling the same data are transmitted with different time resources, the offset values included in each DCI are different values.

FIG. 7 shows a case where a plurality of NR-PDCCHs (DCIs) that schedule data of the same time resource (for example, the same data) are assigned to different time resources. FIG. 7 shows a case where the NR-PDCCH (DCI) that schedules the data transmitted in the symbols # 7 and # 8 (mini slot # 3) is transmitted in the symbol # 0 and the symbol # 3, respectively. The same or different beams (for example, BPL) are applied to the NR-PDCCH (DCI) transmitted by the symbol # 0 and the symbol # 3, respectively.

In this case, the data scheduling timing is controlled based on the detection timing of each DCI. Therefore, the offset values included in the DCI transmitted by the symbol # 0 and the symbol # 3 are different values. The DCI transmitted with symbol # 0 contains an offset value corresponding to 7 symbols + 8 symbols (or 3 mini slots). The DCI transmitted by symbol # 3 includes an offset value corresponding to 4 symbols + 5 symbols (or 2 mini slots). The user terminal controls the data reception timing and / or the transmission timing by 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, the user terminal may stop the detection of the NR-PDCCH of the other beam. By such an operation, the processing load of the user terminal can be reduced. Alternatively, when the user terminal receives a plurality of NR-PDCCHs (DCIs), the plurality of DCIs may be combined (combined) to control the reception and / or transmission of data.

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

(Fourth aspect)
In the fourth aspect, a case where the reception of DL data and / or the transmission of UL data is controlled by using the timing information included in the DCI transmitted on the DL control channel (for example, NR-PDCCH) will be described.

The user terminal controls the reception timing and / or the transmission timing of the data scheduled by the DCI by using the timing information included in the detected NR-PDCCH (DCI). The timing information included in the DCI may be information indicating a position where the data is scheduled (for example, an absolute index of the scheduling unit). That is, the user terminal can determine the data scheduling timing using the information specified by DCI regardless of the reception timing of NR-PDCCH (DCI).

The timing information (for example, the index of the scheduling unit) is the slot index in the subframe or the wireless frame. Alternatively, the timing information may be a mini-slot index within a slot, within a subframe, or within a radio frame. Alternatively, the timing information may be a symbol index within a mini-slot, within a slot, within a subframe, or within a radio frame.

FIG. 8 shows a case where a plurality of NR-PDCCHs (DCIs) that schedule data of the same time resource (for example, the same data) are assigned to different time resources. FIG. 8 shows a case where the NR-PDCCH (DCI) that schedules the data transmitted by the symbols #m and # m + 1 (slot # n) is transmitted by the symbol # 0 and the symbol # 1, respectively. Further, it shows a case where different beams # 1 and # 2 (for example, BPL) are applied to the NR-PDCCH (DCI) transmitted by the symbol # 0 and the symbol # 1, respectively.

In FIG. 8, the data scheduling timing is controlled based on the timing information (for example, the index of the scheduling unit) included in each DCI. Therefore, the timing information included in the DCI transmitted by symbol # 0 and symbol # 1, respectively, indicates the same scheduling index.

Here, the DCI transmitted with symbol # 0 includes timing information indicating slot # n and symbol # m + # m + 1. Similarly, the DCI transmitted by symbol # 1 also contains timing information indicating slot # n and symbol # m + # m + 1. The user terminal controls the data reception timing and / or the data transmission timing by using the 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 notify the user terminal of the predetermined timing information by notifying the predetermined bit information using DCI. Further, a plurality of timing information candidates may be defined as fixed values, or may be appropriately set by using upper layer signaling or the like.

The timing information is defined in a predetermined time unit (for example, a scheduling unit). For example, timing information is specified using at least one OFDM symbol, a minislot, and a slot. Further, timing information may be defined by combining at least two of a plurality of scheduling units (OFDM symbols, mini-slots, slots, etc.).

Further, timing information may be specified for scheduling DL data and scheduling UL data by using different scheduling units. For example, the timing information included in the DCI that schedules DL data may be specified by symbols and / or mini-slots, and the timing information included in the DCI that schedules UL data may be specified by slots, mini-slots, and / or symbols. ..

Further, when the user terminal detects at least one NR-PDCCH, the user terminal may stop the detection of the NR-PDCCH of the other beam. By such an operation, the processing load of the user terminal can be reduced. Alternatively, when the user terminal receives a plurality of NR-PDCCHs (DCIs), the two DCIs may be combined (combined) to control the reception and / or transmission of data.

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

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

Alternatively, the minislot index and / or symbol index on which the data is scheduled is determined based on the offset value included in the DCI with the minislot and / or symbol to which 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 by using another bit field of DCI (a bit field different from the offset value).

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

(Wireless communication system)
Hereinafter, the configuration of the wireless communication system according to the present embodiment will be described. In this wireless communication system, communication is performed using any one of the wireless communication methods according to each of 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 wireless communication system according to the present embodiment. In the wireless communication system 1, carrier aggregation (CA) and / or dual connectivity (DC) that integrates a plurality of fundamental frequency blocks (component carriers) with the system bandwidth (for example, 20 MHz) of the LTE system 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), and 5G. It may be called (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), or the like, or it may be called a system that realizes these.

The radio communication system 1 includes a radio base station 11 that forms a macro cell C1 having a relatively wide coverage, and a radio base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. , Is equipped. Further, a user terminal 20 is arranged in the macro cell C1 and each small cell C2.

The user terminal 20 can be connected to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 at the same time by CA or DC. Further, the user terminal 20 may apply CA or DC using a plurality of cells (CCs) (for example, 5 or less CCs and 6 or more CCs).

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

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

The radio base station 11 and each radio base station 12 are each connected to the host station device 30, and are connected to the core network 40 via the host station device 30. The host station device 30 includes, but is not limited to, an access gateway device, a wireless network controller (RNC), a mobility management entity (MME), and the like. Further, each radio base station 12 may be connected to the host station apparatus 30 via the radio base station 11.

The radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like. Further, the radio base station 12 is a radio base station having local coverage, and is 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), and transmission / reception. It may be called a point or the like. Hereinafter, when the radio base station 11 and the radio base station 12 are not distinguished, they are collectively referred to as the radio base station 10.

Each user terminal 20 is a terminal corresponding to various communication methods such as LTE and LTE-A, and may include not only a mobile communication terminal (mobile station) but also a fixed communication terminal (fixed station).

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

OFDMA is a multi-carrier transmission system in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers), data is mapped to each subcarrier, and communication is performed. SC-FDMA is a single carrier transmission method that reduces interference between terminals by dividing the system bandwidth into a band consisting of one or a continuous resource block for each terminal and using different bands for multiple terminals. be. The uplink and downlink wireless access methods are not limited to these combinations, and other wireless access methods may be used.

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

The downlink L1 / L2 control channel includes a PDCCH (Physical Downlink Control Channel), an EPDCCH (Enhanced Physical Downlink Control Channel), a PCFICH (Physical Control Format Indicator Channel), a PHICH (Physical Hybrid-ARQ Indicator Channel), and the like. Downlink control information (DCI) including scheduling information of PDSCH and PUSCH is transmitted by PDCCH. The number of OFDM symbols used for PDCCH is transmitted by PCFICH. The PHICH transmits HARQ (Hybrid Automatic Repeat reQuest) delivery confirmation information (for example, retransmission control information, HARQ-ACK, ACK / NACK, etc.) to PUSCH. EPDCCH is frequency-division-multiplexed with PDSCH and is used for transmission of DCI and the like like PDCCH. PDCCH and / or EPDCCH are also referred to as DL control channel, NR-PDCCH and the like.

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

In the wireless communication system 1, the DL reference signal includes a cell-specific reference signal (CRS), a channel state information-reference signal (CSI-RS), and a demodulation reference signal (DMRS:). DeModulation Reference Signal), Positioning Reference Signal (PRS), Mobility Reference Signal (MRS), etc. are transmitted. Further, in the wireless communication system 1, a measurement reference signal (SRS: Sounding Reference Signal), a demodulation reference signal (DMRS), and the like are transmitted as UL reference signals. The DMRS may be called a user terminal specific reference signal (UE-specific reference signal). Further, the reference signal to be transmitted is not limited to these. Further, in the wireless communication system 1, a synchronization signal (PSS and / or SSS), a broadcast channel (PBCH), and the like are transmitted on the downlink.

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

The user data transmitted from the radio base station 10 to the user terminal 20 via the downlink is input from the host station apparatus 30 to the baseband signal processing unit 104 via the transmission line interface 106.

The baseband signal processing unit 104 processes user data in the PDCP (Packet Data Convergence Protocol) layer, divides / combines user data, performs RLC layer transmission processing such as RLC (Radio Link Control) retransmission control, and MAC (Medium Access). Control) Retransmission control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, precoding processing, and other transmission processing are performed in the transmission / reception unit. Transferred to 103. Further, the DL control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and is transferred to the transmission / reception unit 103.

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

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

The baseband signal processing unit 104 performs fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing, and error correction for the user data included in the input UL signal. Decoding, MAC retransmission control reception processing, RLC layer and PDCP layer reception processing are performed, and the result is transferred to the host station apparatus 30 via the transmission path interface 106. The call processing unit 105 performs call processing such as setting and releasing of a communication channel, status management of the radio base station 10, and management of radio resources.

The transmission line interface 106 transmits and receives signals to and from the host station apparatus 30 via a predetermined interface. Further, the transmission line interface 106 transmits / receives a signal (backhaul signaling) to / from another radio base station 10 via an inter-base station interface (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface). You may.

The transmission / reception unit 103 may further include an analog beamforming unit that performs analog beamforming. The analog beamforming unit comprises an analog beamforming circuit (for example, a phase shifter, a phase shift circuit) or an analog beamforming device (for example, a phase shifter) described based on common recognition in the technical field according to the present invention. can do. Further, the transmission / reception antenna 101 can be configured by, for example, an array antenna. Further, the transmission / reception unit 103 is configured so that a single BF and a multi-BF can be applied.

The transmission / reception unit 103 transmits a DL signal (for example, NR-PDCCH / PDSCH, a mobility measurement signal, CSI-RS, DMRS, DCI, at least one of DL data), and a UL signal (for example, PUCCH, PUSCH, recovery). Receive at least one of signal, measurement report, beam report, CSI report, UCI, UL data).

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

FIG. 11 is a diagram showing an example of the functional configuration of the radio base station according to the present embodiment. In this example, the functional blocks of the feature portion in the present embodiment are mainly shown, and it is assumed that the wireless base station 10 also has other functional blocks necessary for wireless communication.

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

The control unit (scheduler) 301 controls the entire radio base station 10. The control unit 301 can be composed of a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.

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

The control unit 301 controls the scheduling of the DL data channel and the UL data channel, and controls the generation and transmission of the DCI (DL assignment) for scheduling the DL data channel and the DCI (UL grant) for scheduling the UL data channel. ..

The control unit 301 forms a Tx beam and / or an Rx beam by using the digital BF (for example, precoding) by the baseband signal processing unit 104 and / or the analog BF (for example, phase rotation) by the transmission / reception unit 103. To control. For example, the control unit 301 controls a beam (Tx beam and / or Rx beam) used for transmitting and / or receiving a DL signal (for example, NR-PDCCH / PDSCH).

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

The transmission signal generation unit 302 generates a DCI (DL assignment, UL grant) based on, for example, an instruction from the control unit 301. Further, the DL data channel (PDSCH) is subjected to coding processing, modulation processing, beamforming processing (precoding processing) according to the coding rate, modulation method, etc. determined based on the CSI from each user terminal 20. Will be.

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

The reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 103. Here, the received signal is, for example, a UL signal transmitted from the user terminal 20. 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 according to the present invention.

The reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when feedback information (for example, CSI, HARQ-ACK, etc.) from a user terminal is received, the feedback information is output to the control unit 301. Further, the reception signal processing unit 304 outputs the reception signal and the signal after the reception processing to the measurement unit 305.

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

The measuring unit 305 uses, for example, the received power (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 of the received signal. You may measure about the state and the like. The 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 the user terminal according to the present embodiment. The user terminal 20 includes a plurality of transmission / reception antennas 201, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205. The transmission / reception antenna 201, the amplifier unit 202, and the transmission / reception unit 203 may be configured to include one or more of each.

The radio frequency signal received by the transmission / reception antenna 201 is amplified by the amplifier unit 202. The transmission / reception unit 203 receives the DL signal amplified by the amplifier unit 202. The transmission / reception unit 203 frequency-converts the received signal into a baseband signal and outputs it to the baseband signal processing unit 204. The transmitter / receiver 203 may consist of a transmitter / receiver, a transmitter / receiver circuit, or a transmitter / receiver described based on common recognition in the technical field according to the present invention. The transmission / reception unit 203 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.

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

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

The transmission / reception unit 203 may further include an analog beamforming unit that performs analog beamforming. The analog beamforming unit comprises an analog beamforming circuit (for example, a phase shifter, a phase shift circuit) or an analog beamforming device (for example, a phase shifter) described based on common recognition in the technical field according to the present invention. can do. Further, the transmission / reception antenna 201 can be configured by, for example, an array antenna. Further, the transmission / reception unit 203 is configured so that a single BF and a multi-BF can be applied.

The transmission / reception unit 203 receives a DL signal (for example, at least one of NR-PDCCH / PDSCH, mobility measurement signal, CSI-RS, DMRS, DCI, and DL data) and receives a UL signal (for example, PUCCH, PUSCH, recovery). At least one of signal, measurement report, beam report, CSI report, UCI, UL data) is transmitted.

Further, the transmission / reception unit 203 sets one or more NR-PDCCHs (or NR-PDCCH candidates and 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 transmission / reception unit 203 may receive the 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 the DCI reception timing, and information indicating an index of a predetermined scheduling unit. Further, the transmission / reception unit 203 may receive information regarding the reference timing.

FIG. 13 is a diagram showing an example of the functional configuration of the user terminal according to the present embodiment. In this example, the functional blocks of the feature portion in the present embodiment are mainly shown, and it is assumed that the user terminal 20 also has other functional blocks necessary for wireless communication.

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

The control unit 401 controls the entire user terminal 20. The control unit 401 can be composed of a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.

The control unit 401 controls, for example, the generation of a signal by the transmission signal generation unit 402 and the allocation of the signal by the mapping unit 403. Further, the control unit 401 controls the signal reception processing by the reception signal processing unit 404 and the 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 reception signal processing unit 404. The control unit 401 controls the generation of the UL control signal (for example, delivery confirmation information) and the UL data signal based on the DL control signal, the result of determining the necessity of retransmission control for the DL data signal, and the like.

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

The control unit 401 controls the reception and / or transmission of the data scheduled by the DCI, and controls the data reception timing and / or the transmission timing based on at least the timing information included in the 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, when the timing information is an offset value from the DCI reception timing, the control unit 401 controls the data reception timing and / or the data reception timing based on the DCI reception timing and offset value (see FIG. 7). Alternatively, when the timing information is information indicating the index of a predetermined scheduling unit, the control unit 401 controls the data reception timing and / or the transmission timing based on the index indicating information (see FIG. 8).

Further, when the control unit 401 detects a plurality of DCIs that schedule data of the same time resource, the control unit 401 controls the reception and / or transmission of the data based on the first detected DCI and / or the last detected DCI. May be good.

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

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

Based on the instruction from the control unit 401, the mapping unit 403 maps the UL signal generated by the transmission signal generation unit 402 to the radio resource and outputs it to the transmission / reception unit 203. The mapping unit 403 can be composed of a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.

The reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 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 described based on common recognition in the technical field according to the present invention. Further, the received signal processing unit 404 can form a receiving unit according to the present invention.

The reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401. The reception signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401. Further, the reception signal processing unit 404 outputs the reception signal and the signal after the reception processing to the measurement unit 405.

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

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

<Hardware configuration>
The block diagram used in the description of the above embodiment shows a block of functional units. These functional blocks (components) are realized by any combination of hardware and / or software. Further, the means for realizing each functional block is not particularly limited. That is, each functional block may be realized by one physically and / or logically coupled device, or directly and / or indirectly by two or more physically and / or logically separated devices. (For example, wired and / or wireless) may be connected and realized by these a plurality of devices.

For example, the wireless base station, user terminal, or the like in one embodiment of the present invention may function as a computer that processes the wireless communication method of the present invention. FIG. 14 is a diagram showing an example of the hardware configuration of the radio base station and the user terminal according to the 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.

In the following description, the word "device" can be read as a circuit, a device, a 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 the devices shown in the figure, or may be configured not to include some of the devices.

For example, although only one processor 1001 is shown, there may be multiple processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by other methods on one or more processors. The processor 1001 may be mounted on one or more chips.

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

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

Further, the processor 1001 reads a program (program code), a software module, data, and the like from the storage 1003 and / or the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be similarly realized for other functional blocks.

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

The storage 1003 is a computer-readable recording medium, and is, for example, a flexible disc, a floppy (registered trademark) disc, a magneto-optical disc (for example, a compact disc (CD-ROM (Compact Disc ROM)), etc.), a digital versatile disc, and the like. At least one of Blu-ray® disks, removable disks, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. It may be composed of. The storage 1003 may be referred to as an auxiliary storage device.

The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize Frequency Division Duplex (FDD) and / or Time Division Duplex (TDD). It may be configured. For example, the above-mentioned transmission / reception antenna 101 (201), amplifier unit 102 (202), transmission / reception unit 103 (203), transmission line interface 106, and the like may be realized by the communication device 1004.

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

Further, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. Bus 1007 may be composed of a single bus, or may be composed of different buses between devices.

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

(Modification example)
The terms described herein and / or the terms necessary for understanding the present specification may be replaced with terms having the same or similar meanings. For example, the channel and / or symbol may be a signal (signaling). Also, the signal may be a message. The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot), a pilot signal, or the like depending on the applied standard. Further, the component carrier (CC: Component Carrier) may be referred to as a cell, a frequency carrier, a carrier frequency, or the like.

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

Further, the slot may be composed of one or more symbols (OFDMA (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain. In addition, the slot may be a time unit based on numerology. Further, the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. The mini-slot may also be referred to as a sub-slot.

Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. The radio frame, subframe, slot, minislot and symbol may have different names corresponding to each. For example, one subframe may be referred to as a transmission time interval (TTI), a plurality of consecutive subframes may be referred to as a TTI, and one slot or one minislot may be referred to as a TTI. You may. That is, the subframe and / or TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. There may be. The unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.

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

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

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

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

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

A resource block (RB) is a resource allocation unit in a time domain and a frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The RB may also include one or more symbols in the time domain and may be one slot, one minislot, one subframe or one TTI in length. Each 1TTI and 1 subframe may be composed of one or a plurality of resource blocks. One or more RBs include a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.

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

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

Further, the information, parameters, etc. described in the present specification may be represented by an absolute value, a relative value from a predetermined value, or another corresponding information. .. For example, the radio resource may be one indicated by a predetermined index. Further, mathematical formulas and the like using these parameters may differ from those expressly disclosed herein.

The names used for parameters and the like in the present specification are not limited in any respect. 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, and therefore various assigned to these various channels and information elements. The name is not limited in any way.

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

Further, information, signals and the like can be output from the upper layer to the lower layer and / or from the lower layer to the upper layer. Information, signals, etc. may be input / output via a plurality of network nodes.

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

Notification of information is not limited to the embodiments / embodiments described herein, and may be performed by other methods. For example, information notification includes physical layer signaling (for example, downlink control information (DCI), uplink control information (UCI)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, etc.). It may be carried out 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 be referred to as L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like. Further, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRCConnectionSetup message, an RRCConnectionReconfiguration message, or the like. Further, MAC signaling may be notified by, for example, a MAC control element (MAC CE (Control Element)).

In addition, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but implicitly (for example, by not giving the notification of the predetermined information or another). It may be done (by notification of information).

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

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc. should be broadly interpreted.

Further, software, instructions, information and the like may be transmitted and received via 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 a website, server. , Or when transmitted from other remote sources, these wired and / or wireless technologies are included within the definition of transmission medium.

The terms "system" and "network" as used herein are used interchangeably.

In this specification, "Base Station (BS)", "Wireless Base Station", "eNB", "gNB", "Cell", "Sector", "Cell Group", "Carrier" and "Component Carrier" The term "" can be used interchangeably. Base stations are sometimes referred to by terms such as fixed station, NodeB, eNodeB (eNB), access point, transmission point, reception point, femtocell, and small cell.

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

In the present specification, the terms "mobile station (MS)", "user terminal", "user equipment (UE)" and "terminal" may be used interchangeably. Base stations are sometimes referred to by terms such as fixed station, NodeB, eNodeB (eNB), access point, transmission point, reception point, femtocell, and small cell.

Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to by a terminal, remote terminal, handset, user agent, mobile client, client or some other suitable term.

Further, the radio base station in the present specification may be read by the 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 function of the radio base station 10 described above. In addition, words such as "up" and "down" may be read as "side". For example, the upstream channel may be read as a side channel.

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

In the present specification, the specific operation performed by the base station may be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, various operations performed for communication with a terminal are performed by one or more network nodes other than the base station and the base station (for example, the base station). It is clear that 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 in the present specification may be used alone, in combination, or switched with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present specification may be changed as long as there is no contradiction. For example, the methods described herein present elements of various steps in an exemplary order, and are not limited to the particular order presented.

Each aspect / embodiment described herein 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), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM® (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), LTE 802.11 (Wi-Fi®), LTE 802.16 (WiMAX®), LTE 802 It may be applied to systems utilizing .20, UWB (Ultra-WideBand), Bluetooth®, and other suitable wireless communication methods and / or next-generation systems extended based on them.

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

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

The term "determining" as used herein may include a wide variety of actions. For example, "decision" is calculating, computing, processing, deriving, investigating, looking up (eg, table, database or another data). It may be regarded as "judgment (decision)" of (search in structure), confirmation (ascertaining), and the like. In addition, "judgment (decision)" includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as "judgment (decision)" of "accessing" (for example, accessing data in memory). In addition, "judgment (decision)" is regarded as "judgment (decision)" of solving, selecting, selecting, establishing, comparing, and the like. May be good. That is, "judgment (decision)" may be regarded as "judgment (decision)" of some action.

As used herein, the terms "connected", "coupled", or any variation thereof, may be any direct or indirect connection between two or more elements or. It means a bond and can include the presence of one or more intermediate elements between two elements that are "connected" or "bonded" to each other. The connections or connections between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access." As used herein, the two elements are by using one or more wires, cables and / or printed electrical connections, and, as some non-limiting and non-comprehensive examples, radio frequencies. It can be considered to be "connected" or "coupled" to each other by using electromagnetic energy or the like having wavelengths in the region, microwave region and / or light (both visible and invisible) regions.

As used herein or in the claims, "including," "comprising," and variations thereof, these terms are as comprehensive as the term "comprising." Intended to be targeted. Furthermore, the term "or" as used herein or in the claims is intended not to be an exclusive OR.

Although the present invention has been described in detail above, it is clear to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as modifications and modifications without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description of the present specification is for the purpose of exemplification and does not have any limiting meaning to the present invention.

Claims (6)

A receiver that receives downlink control information and a downlink shared channel scheduled by the downlink control information, and
A control unit that determines the allocation of the downlink shared channel in the time domain based on the first timing specified by the slot and the second timing specified by the symbol obtained from the information notified by the downlink control information. Have,
The control unit determines a predetermined slot in which the downlink shared channel is scheduled based on the slot in which the downlink control information is transmitted and the offset value obtained from the information notified by the downlink control information, and the downlink control information. A terminal characterized in that a symbol to which the downlink shared channel is assigned is determined based on the information notified in. The terminal according to claim 1, wherein the control unit determines a symbol to which the downlink shared channel is assigned based on the information notified by the downlink control information, with the head of the predetermined slot as a reference timing. .. A receiver that receives downlink control information used for uplink shared channel scheduling,
A control unit that determines the allocation of the uplink shared channel in the time domain based on the first timing specified by the slot and the second timing specified by the symbol obtained from the information notified by the downlink control information. Have,
The control unit determines a predetermined slot in which the uplink shared channel is scheduled based on the slot in which the downlink control information is transmitted and the offset value obtained from the information notified by the downlink control information, and determines the downlink control information. A terminal characterized in that the symbol to which the uplink shared channel is assigned is determined based on the information notified in. The terminal according to claim 3, wherein the control unit determines a symbol to which the uplink shared channel is assigned based on the information notified by the downlink control information, with the head of the predetermined slot as a reference timing. .. The process of receiving the downlink control information and the downlink shared channel scheduled by the downlink control information, and
A step of determining the allocation of the downlink shared channel in the time domain based on the first timing specified by the slot and the second timing specified by the symbol obtained from the information included in the downlink control information. Have and
The step of determining the allocation determines a predetermined slot in which the downlink shared channel is scheduled based on the slot in which the downlink control information is transmitted and the offset value obtained from the information notified by the downlink control information. A wireless communication method comprising determining a symbol to which the downlink shared channel is assigned based on information notified by downlink control information. A transmitter that transmits downlink control information and a downlink shared channel scheduled by the downlink control information, and
It has a control unit that controls the allocation of the downlink shared channel in the time domain based on the first timing specified by the slot and the second timing specified by the symbol obtained from the information notified by the downlink control information. death,
The control unit determines a predetermined slot in which the downlink shared channel is scheduled based on a slot for transmitting the downlink control information and an offset value obtained from the information notified by the downlink control information, and notifies the downlink control information. A radio base station characterized in that a symbol to which the downlink shared channel is assigned is determined based on the information to be assigned.

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