WO2020003542A1

WO2020003542A1 - User equipment and base station

Info

Publication number: WO2020003542A1
Application number: PCT/JP2018/024974
Authority: WO
Inventors: 翔平吉岡; 一樹武田; 聡永田; リフェワン; シャオツェングオ; ギョウリンコウ
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2018-06-29
Filing date: 2018-06-29
Publication date: 2020-01-02

Abstract

A user equipment in an embodiment of the present disclosure has: a reception unit for receiving a higher layer parameter indicating a first modulation and coding scheme (MCS) table and receiving downlink control information for scheduling a physical uplink shared channel; and a control unit for, when the downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, determining an MCS table and/or an MCS index for the physical uplink shared channel on the basis of the higher layer parameter and/or the downlink control information. According to this embodiment of the present disclosure, a physical uplink shared channel having no corresponding uplink transport channel can be properly transmitted.

Description

User terminal and base station

The present disclosure relates to a user terminal and a base station in a next-generation mobile communication system.

In a UMTS (Universal Mobile Telecommunications System) network, long term evolution (LTE: Long Term Evolution) has been specified for the purpose of higher data rates and lower delays (Non-Patent Document 1). Also, LTE-A (LTE Advanced, LTE @ Rel. 10, 11, 12, 13) has been specified for the purpose of further increasing the capacity and sophistication of LTE (LTE @ Rel. 8, 9).

Succession system of LTE (for example, FRA (Future Radio Access), 5G (5th generation mobile communication system), 5G + (plus), NR (New Radio), NX (New radio access), FX (Future generation radio access), LTE Rel. 14 or 15).

In an existing LTE system (for example, 3GPP@Rel.8-14), a user terminal (UE: User @ Equipment) is based on downlink control information (DCI: Downlink @ Control @ Information, also referred to as DL assignment, etc.) from a base station. , And control the reception of a physical downlink shared channel (for example, PDSCH: Physical Downlink Shared Channel). Also, the user terminal controls transmission of a physical uplink shared channel (for example, PUSCH: Physical Uplink Shared Channel) based on DCI (also referred to as UL grant or the like).

In the NR, not only a physical uplink shared channel (for example, PUSCH: Physical Uplink Shared Channel) in which a corresponding transport channel (also referred to as data) exists, but also a physical uplink shared channel in which the corresponding transport channel does not exist. It is assumed that For example, the transport channel corresponding to PUSCH is also called UL-SCH (Uplink \ Shared \ Channel, uplink transport channel, uplink data) and the like.

In the NR, the user terminal performs a PUSCH scheduled by the DCI based on a value of a predetermined field (for example, a modulation and coding scheme (MCS) field) in the downlink control information (DCI). It has been studied to determine at least one of the modulation order and the coding rate of.

However, it is assumed that the transmitted contents are different between the PUSCH without the UL-SCH and the PUSCH without the UL-SCH. For this reason, when determining at least one of the coding rate and the modulation order of the PUSCH without the UL-SCH in the same manner as the PUSCH with the UL-SCH, the PUSCH without the UL-SCH may not be appropriately transmitted. is there.

The present disclosure has been made in view of such a point, and has disclosed a user terminal and a base station that can appropriately transmit a physical uplink shared channel (eg, PUSCH) without a corresponding uplink transport channel (eg, UL-SCH). One of the purposes is to provide.

A receiving unit that receives an upper layer parameter indicating a first modulation and coding scheme (MCS) table and receives downlink control information for scheduling of a physical uplink shared channel, a user terminal according to an aspect of the present disclosure, When the downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, based on at least one of the higher layer parameters and the downlink control information, , An MCS table and a control unit for determining at least one of the MCS indexes.

According to an aspect of the present disclosure, it is possible to appropriately transmit a physical uplink shared channel without a corresponding uplink transport channel.

FIG. 1 is a diagram illustrating an example of the MCS table. FIG. 2 is a diagram illustrating an example of the MCS table. FIG. 3 is a diagram illustrating an example of the MCS table. FIG. 4 is a diagram illustrating a first example of a method of determining an MCS table and an entry according to the first example. FIG. 5 is a diagram illustrating a second example of the MCS table and entry determination method according to the first example. FIG. 6 is a diagram illustrating a third example of the MCS table and entry determination method according to the first example. FIG. 7 is a diagram illustrating an example of an MCS table and entry determination method according to the second example. FIG. 8 is a diagram illustrating an example of an MCS table and an entry determination method according to the third embodiment. FIG. 9 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 10 is a diagram illustrating an example of an overall configuration of a base station according to one embodiment. FIG. 11 is a diagram illustrating an example of a functional configuration of the base station according to the embodiment. FIG. 12 is a diagram illustrating an example of the overall configuration of the user terminal according to the embodiment. FIG. 13 is a diagram illustrating an example of a functional configuration of the user terminal according to the embodiment. FIG. 14 is a diagram illustrating an example of a hardware configuration of a base station and a user terminal according to an embodiment.

In the NR, a predetermined field (for example, a modulation and coding scheme (MCS) field (for example, 5) included in downlink control information (DCI: Downlink Control Information) (UL grant, for example, DCI format 0_0, 0_1) ), MCS index ( _IMCS )), and at least one of a modulation scheme (or modulation order) and a coding rate of a physical uplink shared channel (eg, PUSCH: Physical Uplink Shared Channel) scheduled by the DCI. Control of (modulation order / coding rate) is being studied.

Specifically, the user terminal (UE: User @ Equipment) indicates the MCS field in the DCI using a table (MCS table) that associates the MCS index, the modulation order (Modulation @ order), and the TBS index. Determining the modulation order / coding rate corresponding to the MCS index for PUSCH is under study.

Here, each modulation order is a value corresponding to each modulation method. For example, the modulation orders of QPSK (Quadrature Phase Shift Keying), 16 QAM (Quadrature Amplitude Modulation), 64 QAM, and 256 QAM are 2, 4, 6, and 8, respectively.

FIG. 1-3 is a diagram showing an example of the MCS table. It should be noted that the values of the MCS table shown in FIG. 1-3 are merely examples, and the present invention is not limited to these values. Some items (for example, spectrum efficiency) associated with the MCS index ( _IMCS ) may be omitted, or other items may be added.

The user terminal may determine which MCS table to use to determine the modulation order / coding rate of the PUSCH according to at least one of the following conditions (1) to (3):
(1) Whether or not transform precoding is enabled (either a DFT-s-OFDM (Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing) waveform or an OFDM waveform is applied) Or)
(2) whether information indicating an MCS table used by the user terminal (MCS table information) indicates a specific modulation scheme (for example, 256QAM),
(3) Which RNTI (Radio Network Temporary Identifier, identifier) is a DCI having a CRC scrambled (CRC scrambled).

For example, in the user terminal, DCI (eg, DCI format 0_0 or 0_1) is CRC-scrambled with a specific RNTI (eg, C-RNTI, TC-RNTI, CS-RNTI), and transform precoding is disabled ( disabled) and the MCS table information does not indicate 256QAM, the modulation order / coding rate corresponding to the MCS index ( _IMCS ) in the DCI is determined using the table shown in FIG. Is also good.

Also, when transform precoding is disabled and the MCS table information indicates 256 QAM, the user terminal uses the table shown in FIG. 2 to correspond to the MCS index ( _IMCS ) in the DCI. The modulation order / coding rate may be determined.

Further, when the transform precoding is enabled and the MCS table information does not indicate 256QAM, the user terminal uses the table shown in FIG. 3 to correspond to the MCS index ( _IMCS ) in the DCI. May be determined.

For example, in FIG. 3, when the user terminal satisfies a specific condition (for example, BPSK support), the modulation order q corresponding to a specific MCS index (for example, 0, 1) is 1 (BPSK). You may. If the above specific condition is not satisfied, the modulation order q may be 2 (QPSK).

Further, when transform precoding is enabled and the MCS table information indicates 256 QAM, the user terminal uses the table shown in FIG. 2 to correspond to the MCS index ( _IMCS ) in the DCI. The modulation order / coding rate may be determined.

条件 The conditions for using the table shown in FIG. 1-3 are not limited to the above conditions.

ＮＲ By the way, the NR supports a CSI report in which a result measured by a user terminal based on a reference signal for measuring a channel state is fed back to a base station at predetermined timing as channel state information (CSI).

The reference signal for measuring the channel state is also called, for example, CSI-RS (Channel State-Information-Reference Signal), but is not limited to this. The CSI may include at least one of CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), and RI (Rank Indicator). Further, the CSI may include at least one of a first CSI (CSI part 1) and a second CSI (CSI part 2).

The CSI report includes a periodic CSI report (P-CSI report), a CSI report using resources designated as semi-persistent (Semi-Persistent) (SP-CSI report), Periodic CSI reporting (A-CSI reporting) is supported.

When the UE reports the A-CSI, the UE transmits the A-CSI in response to a CSI trigger (CSI request) from the base station. For example, the UE performs an A-CSI report at a predetermined timing (for example, four subframes) after receiving the CSI trigger.

The A-CSI trigger is included in downlink control information (DCI: Downlink Control Information) transmitted using a downlink control channel (PDCCH: Physical Downlink Control Channel). The DCI including the A-CSI trigger is a UL grant and is, for example, at least one of DCI formats 0_0 and 0_1.

In the A-CSI report, the user terminal transmits the CSI using the PUSCH specified by the UL grant including the A-CSI trigger. When there is no corresponding transport channel (UL-SCH: Uplink Shared Channel, also referred to as uplink data, uplink user data, and the like), the PUSCH is also referred to as a PUSCH without a UL-SCH (PUSCH without UL-SCH).

Whether or not a PUSCH without the UL-SCH may be indicated by a predetermined field in the UL grant (eg, a UL-SCH indicator (UL-SCH indicator) field).

For example, the UL-SCH indicator field may be 1 bit. If the PUSCH without UL-SCH is triggered, the UL-SCH indicator field may be set to 0, and if the PUSCH with UL-SCH is triggered, the UL-SCH indicator field may be set to 1.

As described above, the PUSCH without the UL-SCH is used for transmission of uplink control information (for example, A-CSI), and data transmitted on the PUSCH with the UL-SCH (for example, uplink user data and upper layer control information). There is a possibility that the content of data to be transmitted is different from at least one.

ため Therefore, it is conceivable that the PUSCH modulation order / coding rate determination method is set differently for the PUSCH with the UL-SCH and the PUSCH without the UL-SCH.

In LTE, a combination of a plurality of fields in DCI indicates A-CSI on PUSCH without UL-SCH.

In NR, it is considered that a 1-bit field in DCI indicates A-CSI on PUSCH without UL-SCH. For example, it has been considered that DCI format 0_1 includes a 1-bit UL-SCH indicator field, and that the modulation and coding rate (MCS) is determined by I_MCS in DCI. The UL-SCH indicator may indicate the presence or absence of the UL-SCH on the PUSCH scheduled by the DCI. For example, if the UL-SCH indicator field is set to 1, the DCI may indicate a PUSCH transmission with UL-SCH.

In NR, for example, high-speed and large-capacity (for example, enhanced MBB: Broadband), a very large number of terminals (for example, mMTC: massive Machine Type Communication, IoT: Internet of Things), ultra-high reliability and low delay (for example, URLLCL) A plurality of services (also called use cases, communication types, communication, etc.) having different communication requirements (requirements, requirements), such as Ultra / Reliable / Low / Latency / Communications, are assumed. The communication requirement may be, for example, at least one of delay, reliability, capacity (capacity), speed, and performance.

For example, the difference between the communication requirement of URLLC and the communication requirement of eMBB may be that the latency of URLLC is smaller than the latency of eMBB, or that the communication requirement of URLLC includes the communication requirement of reliability. Good. For example, the U-plane latency requirement of the eMBB may include that the downlink U-plane latency is 4 ms and the uplink U-plane latency is 4 ms. On the other hand, the U-plane latency requirement of the URLLC may include that the downlink U-plane latency is 0.5 ms and the uplink U-plane latency is 0.5 ms. URLLC reliability requirements may also include a 32-byte error rate of 10 ⁻⁵ at 1 ms U-plane latency.

@ At least a part of the setting information may be different between the URLLC and the eMBB. The setting information may be at least one of an MCS table and a CQI table. The setting information for eMBB and the setting information for URLLC may be defined in the specification.

It is being considered that a new MCS table for URLLC is introduced and that the new MCS table is indicated by upper layer (RRC) parameters (eg, mcs-table, MCS table information) or new RNTI.

It has been considered to introduce one upper layer parameter for setting a new RNTI for grant-based transmission of @URLLC.

If the new RNTI is not set, the existing upper layer parameter mcs-table indicates one MCS table selected from three MCS tables (the existing 64QAM @ MCS table, the existing 256QAM @ MCS table, and the new 64QAM @ MCS table). May be extended. When the mcs-table indicates the new 64QAM @ MCS table, the existing 64QAM @ MCS table is used for the DCI formats 0_0 and 0_1 in the common search space (CSS), and the DCI format 0_0 in the UE individual search space (USS) is used. A new 64QAM @ MCS table may be used for 0_1, 1_0, 1_1. Otherwise, existing actions may be followed. The configuration for DL and UL may be different.

If the new RNTI is configured, the UE may select the MCS table based on the RNTI used for DCI CRC scrambling. When the new RNTI is set, the UE may apply the MCS table associated with the RNTI used for the DCI CRC scrambling for PUSCH scheduling to the PUSCH.

Each of the plurality of types of RNTIs may be associated with a communication requirement (eMBB, URLLC, etc.) or an MCS table (MCS table for eMBB, MCS table for URLLC, etc.). The RNTI (eg, the new RNTI) associated with the URLLC or the MCS table for the URLLC may be different from the RNTI (eg, the C-RNTI) associated with the eMBB or the MCS table for the eMBB.

The new RNTI may be referred to as a URLLC RNTI, a URLLC-RNTI, a Y-RNTI, or the like.

If the CRC of DCI is scrambled using the new RNTI, the UE may use a new MCS table (new 64QAM @ MCS table, MCS table for URLLC). Otherwise, the UE may follow the existing operation. For example, if the CRC of the DCI is scrambled using an RNTI (eg, C-RNTI) different from the new RNTI, the UE uses the existing MCS table (64QAM @ MCS table or 256QAM @ MCS table, MCS table for eMBB). Is also good.

The MCS indication in the DCI is an MCS index (MCS index smaller than a predetermined value, non-reserved MCS index, non-reserved @ I_MCS) in a first range (a range different from the predetermined range) in the MCS table specified by mcs-table. ) May be indicated. The predetermined value is, for example, 28 or 29. The non-reserved MCS index is, for example, 0 to 27 or 0 to 28.

In the MCS instruction for UCI (Uplink Control Information) transmission on the PUSCH without the UL-SCH, the MCS index in a second range (predetermined range) different from the first range (MCS index of a predetermined value or more, reserved MCS index, reserved) I_MCS) may not be excluded. That is, the reserved MCS index may be used for additional purposes. The reserved MCS index is, for example, 28-31 or 29-31.

In the operation for using the MCS table for URLLC, if a new RNTI is not set by the upper layer, it may be necessary to perform RRC reconfiguration to change the MCS table. However, it is preferable that the MCS table applied to uplink transmission be dynamically changed.

Therefore, the present inventors have conceived a method of determining an MCS (for example, at least one of a modulation order and a coding rate) for UCI transmission on the PUSCH without the UL-SCH.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The aspects according to the present embodiment may be applied alone or in combination.

Also, the use of PUSCH without UL-SCH is not limited to A-CSI reporting. For example, the use of PUSCH without UL-SCH may be used for transmission of uplink control information (UCI) including at least one of HARQ-ACK, CSI, and scheduling request.

The configuration shown below may be applied not only to the PUSCH without the UL-SCH but also to the PUSCH with the UL-SCH. Further, the configuration described below may be applied to CP-OFDM, or may be applied to DFT-S-OFDM. Further, the present invention may be applied to DL transmission.

If the new RNTI is not set, the existing upper layer parameter mcs-table is composed of three MCS tables (64QAM @ MCS table (qam64, 64QAM @ MCS table for eMBB), 256QAM @ MCS table (qam256, 256QAM @ MCS table for eMBB), and new 64QAM. It may be extended to show one MCS table selected from the MCS table (qam64LowSE, 64QAM @ MCS table for low spectral efficiency, 64QAM @ MCS table for URLLC).

The UE may use one of the following options 1-1, 1-2, 1-3 to use the new MCS table.

<Option 1-1>
An entry having an unreserved MCS index (eg, 0-27 or 0-28) in the MCS table is used.

<Option 1-2>
The entry having the reserved MCS index (for example, 28 to 31 or 29 to 32) in the MCS table indicates the modulation order, and the coding rate is flexibly set by another means.

<Option 1-3>
The interpretation of the reserved MCS index is changed. A reserved MCS index may be associated with a non-reserved MCS index in a specific MCS table. The UE may refer to an entry having a non-reserved MCS index in the MCS table associated with the reserved MCS index.

If the new RNTI is set and the UL-SCH indicator field is set to 0 (if UCI on PUSCH without UL-SCH is triggered), the DCI with DCI format 0_1 to select the MCS table is selected. A new RNTI may be used for CRC scrambling. If the CRC of the DCI having DCI format 0_1 is scrambled using the new RNTI, the UE may apply the MLC table for URLLC to the PUSCH. Otherwise, the UE may use one of the following options 2-1, 2-2, 2-3.

<Option 2-1>
An entry having an unreserved MCS index in the eMBB MCS table is used.

<Option 2-2>
The entry having the reserved MCS index in the eMBB MCS table indicates the modulation order, and the coding rate is flexibly set by another means.

<Option 2-3>
The interpretation of the reserved MCS index in the eMBB MCS table is changed. A reserved MCS index in the eMBB MCS table may be associated with a non-reserved MCS index in the URLLC MCS table.

The UE may expect (may assume) that the UL-SCH indicator field in the DCI is set to 1 for a specific RNTI that scrambles the CRC of the DCI having the DCI format 0_1.

(First aspect)
In the first aspect, a case will be described in which the DCI can specify a reserved MCS index (for example, 28 to 31 or 29 to 32).

If the UL-SCH indicator field in DCI is set to 0 (triggering UCI transmission on PUSCH without UL-SCH) and the new RNTI is not used to scramble the DCI CRC, the UE shall The MCS table and the MCS index (entry) applied to the PUSCH may be determined based on at least one of the mcs-table and the MCS index indicated by the DCI.

The upper layer parameter mcs-table includes an existing 64QAM @ MCS table (64QAM @ MCS table for eMBB, qam64), an existing 256QAM @ MCS table (256QAM @ MCS table for eMBB, qam256), and a new 64QAM @ MCS table (64QAM @ MCS table for URLLC, qam64LowSE). ) May be indicated.

When the new RNTI is not used for DCI CRC scrambling, the new RNTI may not be set (when the MCS table is determined by the upper layer parameter mcs-table), or the new RNTI is set and the DCI format is used. It may be the case that the CRC of 0_1 is not scrambled using the new RNTI.

The UL-SCH indicator field in the DCI is set to 0, the new RNTI is not used for scrambling the DCI CRC, and the upper layer parameter mcs-table is set in the first MCS table (MCS table for eMBB, qam64 or qam256). If there is and the DCI indicates a reserved MCS index, the UE determines a specific MCS index associated with the MCS index indicated by the DCI as shown in FIG. 4, and determines the second MCS table (URLCS MCS table). , Qam64LowSE) in the specific MCS index (at least one of the modulation order and the coding rate) may be applied to the PUSCH.

The specific MCS index may be a non-reserved MCS index (for example, 0 to 27 or 0 to 28).

The reserved MCS index of the first MCS table (set MCS table) may be associated with a specific MCS index (entry) of the second MCS table.

The association between the reserved MCS index and the specific MCS index, the second MCS table, etc., may be fixed according to the specification, may be set by upper layer parameters, may be indicated by DCI, or may be assigned to the PUSCH. May be determined by the UE based on the number of resources allocated.

The UL-SCH indicator field in the DCI is set to 0, the new RNTI is not used for scrambling the DCI CRC, and the upper layer parameter mcs-table is a second MCS table (URLCS MCS table, qam64LowSE); When the DCI indicates the reserved MCS index, the UE determines the specific MCS index associated with the MCS index indicated by the DCI as shown in FIG. 5, and the first MCS table (eMBB MCS table, qam64). Alternatively, an entry (at least one of the modulation order and the coding rate) of the specific MCS index in qam256) may be used.

The reserved MCS index of the second MCS table (set MCS table) may be associated with a specific MCS index (entry) of the first MCS table.

The association between the reserved MCS index and the specific MCS index, the first MCS table, etc., may be fixed according to the specification, may be set by upper layer parameters, may be indicated by DCI, or may be assigned to PUSCH. May be determined by the UE based on the number of resources allocated.

If the UL-SCH indicator field in the DCI is set to 0 and the DCI indicates a non-reserved MCS index, the UE, as shown in FIG. , DCI, the entry of the MCS index (at least one of the modulation order and the coding rate) may be applied to the PUSCH.

According to the first aspect, the UE can dynamically use an entry in the MCS table different from the MCS table set by the upper layer. For example, even when the UE sets the eMBB MCS table by the upper layer, the UE uses the entry of the URLLC MCS table associated with the reserved MCS index in the DCI for the UCI transmission on the PUSCH without the UL-SCH. be able to.

(Second aspect)
In the second mode, a case will be described in which the DCI cannot specify a reserved MCS index.

If the UL-SCH indicator field in the DCI is set to 0 (triggered UCI transmission on the PUSCH without the UL-SCH), then as shown in FIG. 7, the UE may indicate that the DCI indicates a non-reserved MCS index. expect. In other words, if the UL-SCH indicator field in the DCI is set to 0, the UE does not expect the DCI to indicate a reserved MCS index.

According to the second aspect, since the UE uses only the MCS table set by the upper layer parameter and does not use the reserved MCS index, the UE can reduce the processing load.

(Third aspect)
In the third example, the UE uses the specific MCS table for UCI transmission on the PUSCH without the UL-SCH regardless of the upper layer parameter (mcs-table) indicating the MCS table.

If the UL-SCH indicator field in DCI is set to 0 (if UCI transmission on PUSCH without UL-SCH is triggered), the UE shall send a specific MCS regardless of the value of the upper layer parameter mcs-table. A table may be used. The specific MCS table may be an MCS table for URLLC or an MCS table for eMBB.

For example, when the UL-SCH indicator field in the DCI is set to 0, the UE sets the URL-LCS MCS table on the PUSCH without the UL-SCH even if the MCS table for eMBB is set by higher layer parameters. May be applied. For example, if the UL-SCH indicator field in DCI is set to 1 (when UCI transmission on PUSCH with UL-SCH is triggered), the MCS table for URLLC is set by higher layers. Alternatively, the MCS table for eMBB may be applied to the PUSCH with the UL-SCH.

If the UL-SCH indicator field in the DCI is set to 0 (the UCI on the PUSCH without the UL-SCH is triggered) and the DCI indicates a non-reserved MCS index, then the UE, as shown in FIG. The entry of the MCS index indicated by DCI in a specific MCS table (for example, a URLLC table) may be used. In this case, the UE may use the specific MCS table irrespective of the set upper layer parameter mcs-table, or may use the specific MCS table regardless of whether the new RNTI is set. The specific MCS table may be used regardless of whether the CRC of the DCI is scrambled by the new RNTI.

The UE may use the reserved MCS index in the same manner as in the first example.

If the UL-SCH indicator field in the DCI is set to 0 and the DCI indicates a reserved MCS index, the UE sets the specific MCS index associated with the DCI-indicated MCS index as shown in FIG. Once determined, the entry of the specific MCS index of another MCS table (reference MCS table) may be applied to the PUSCH. In this case, the UE may use the reference MCS table irrespective of the set upper layer parameter mcs-table, or may use the reference MCS table irrespective of whether the new RNTI is set. Alternatively, the reference MCS table may be used regardless of whether the CRC of the DCI is scrambled by the new RNTI.

The specific MCS table may be a URLLC MCS table, and the reference MCS table may be an eMBB MCS table. The specific MCS table may be an eMBB MCS table, and the reference MCS table may be a URLLC MCS table.

逆 Contrary to FIG. 8, the eMBB MCS table may be applied to the PUSCH without the UL-SCH. When the MLC table for URLLC is set in the UE by the upper layer parameter mcs-table, the UE applies the MCS table for URLLC to the PUSCH with UL-SCH and applies the MCS table for eMBB to the PUSCH without UL-SCH. May be.

The association between the reserved MCS index and the specific MCS index, the specific MCS table, the reference MCS table, etc., may be fixed according to specifications, may be set by upper layer parameters, may be indicated by DCI, It may be determined by the UE based on the number of resources allocated to PUSCH.

According to the third aspect, the UE can use a table not set by the upper layer for UCI transmission on the PUSCH without the UL-SCH. For example, even when the MLC table for URLLC is not set by the upper layer, the UE sets the entry of the non-reserved MCS index in the MCS table for URLLC by setting the UL-SCH indicator field in DCI to 0. Can be used. For example, the UE sets the entry of the non-reserved MCS index in the eMBB MCS table by setting the UL-SCH indicator field in the DCI to 0 even if the eMBB MCS table is not set by the upper layer. Can be used.

(Other aspects)
If the CRC of the DCI having DCI format 0_1 is scrambled using the first RNTI (eg, the new RNTI), the UE sets the UL-SCH indicator field in the DCI to 1 (PUSCH without UL-SCH) UCI transmission above is not triggered). In this case, the first RNTI is used for DCI for scheduling PUSCH with UL-SCH. If the UL-SCH indicator field in the DCI with the DCI format 0_1 is set to 0 (triggering UCI transmission on the PUSCH without the UL-SCH), the UE may check that the CRC of the DCI is a different second RNTI ( For example, it may be expected to be scrambled using C-RNTI).

If a first RNTI (eg, a new RNTI) is set for the UE and the CRC of the DCI with DCI format 0_1 is not scrambled using the first RNTI, the UE sets the UL-SCH indicator field in the DCI to one. (UCI transmission on PUSCH without UL-SCH is not triggered). In other words, if the UL-SCH indicator field in the DCI with the DCI format 0_1 is set to 0 (triggering UCI transmission on the PUSCH without the UL-SCH), the UE checks that the CRC of the DCI is the first RNTI May be expected to be scrambled using

If a first RNTI (eg, a new RNTI) is configured for the UE, the UE may not monitor (monitor) a DCI having a CRC scrambled with another second RNTI (eg, a C-RNTI). You don't have to expect that).

場合 If the first RNTI is set to the UE, the UE may monitor the DCI with the CRC scrambled using another second RNTI.

The DCI that schedules the initial transmission of the PUSCH with the UL-SCH may specify a non-reserved MCS index, and the DCI that schedules the retransmission of the PUSCH with the UL-SCH may specify a reserved MCS index.

The DCI that schedules the retransmission of the PUSCH with the UL-SCH may specify the non-reserved MCS index. In this case, each aspect may be applied to PUSCH with UL-SCH. That is, the case where the UL-SCH indicator field of each aspect is set to 0 may be read as the case where the UL-SCH indicator field is set to 1. Further, each aspect may not depend on the value of the UL-SCH indicator field.

(Wireless communication system)
Hereinafter, the configuration of the wireless communication system according to the embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using at least one of the wireless communication methods described in the above embodiments or a combination thereof.

FIG. 9 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. In the wireless communication system 1, carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit are 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. (5th generation mobile communication system), NR (New Radio), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system for realizing these.

The wireless communication system 1 includes a base station 11 forming a macro cell C1 having relatively wide coverage, and a base station 12 (12a to 12c) arranged in the macro cell C1 and forming a small cell C2 smaller than the macro cell C1. Have. Further, user terminals 20 are arranged in the macro cell C1 and each small cell C2. The arrangement, number, and the like of each cell and the user terminals 20 are not limited to the modes shown in the figure.

The user terminal 20 can be connected to both the base station 11 and the base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 simultaneously using CA or DC. In addition, the user terminal 20 may apply CA or DC using a plurality of cells (CCs) (for example, five or less CCs, six or more CCs).

A communication between the user terminal 20 and the base station 11 can be performed using a carrier having a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (also referred to as an existing carrier or a legacy carrier). On the other hand, between the user terminal 20 and the base station 12, a carrier having a relatively high frequency band (for example, 3.5 GHz, 5 GHz or the like) and a wide bandwidth may be used, or between the user terminal 20 and the base station 11. The same carrier as described above may be used. The configuration of the frequency band used by each base station is not limited to this.

The user terminal 20 can perform communication using time division duplex (TDD: Time Division Duplex) and / or frequency division duplex (FDD: Frequency Division Duplex) in each cell. In each cell (carrier), a single numerology may be applied, or a plurality of different numerologies may be applied.

Numerology may be a communication parameter applied to transmission and / or reception of a certain signal and / or channel, for example, subcarrier interval, bandwidth, symbol length, cyclic prefix length, subframe length. , TTI length, number of symbols per TTI, radio frame configuration, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the time domain, and the like.

For example, when the subcarrier intervals of the constituent OFDM symbols are different and / or the number of OFDM symbols is different for a certain physical channel, the numerology may be referred to as different.

The base station 11 and the base station 12 (or between the two base stations 12) may be connected by a wire (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface, or the like) or wirelessly. Good.

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

Note that the base station 11 is a base station having relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like. The base station 12 is a base station having local coverage, such as a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), a RRH (Remote Radio Head), a transmission / reception point, and the like. May be called. Hereinafter, when the

base stations

11 and 12 are not distinguished, they are collectively referred to as a base station 10.

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

In the wireless communication system 1, Orthogonal Frequency Division Multiple Access (OFDMA) is applied to the downlink as a wireless access scheme, and Single-Carrier Frequency Division Multiple Access (SC-FDMA: Single Carrier) is applied to the uplink. Frequency Division Multiple Access) and / or OFDMA is applied.

OFDMA is a multicarrier transmission scheme in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers), and data is mapped to each subcarrier to perform communication. SC-FDMA divides a system bandwidth into bands each composed of one or a continuous resource block for each terminal, and a single carrier transmission that reduces interference between terminals by using different bands for a plurality of terminals. It is a method. The uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.

In the wireless communication system 1, as a downlink channel, a physical downlink shared channel (PDSCH: Physical Downlink Shared Channel), a physical broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel shared by each user terminal 20 Are used. The PDSCH transmits user data, upper layer control information, SIB (System Information Block), and the like. Also, MIB (Master \ Information \ Block) is transmitted by PBCH.

Downlink L1 / L2 control channels include physical downlink control channels (Physical Downlink Control Channel (PDCCH) and / or EPDCCH (Enhanced Physical Downlink Control Channel)), PCFICH (Physical Control Format Indicator Channel), and PHICH (Physical Hybrid-ARQ Indicator Channel). ). Downlink control information (DCI: Downlink Control Information) including PDSCH and / or PUSCH scheduling information is transmitted by the PDCCH.

スケジューリング The scheduling information may be notified by DCI. For example, a DCI that schedules DL data reception may be called a DL assignment, and a DCI that schedules UL data transmission may be called an UL grant.

PCFICH transmits the number of OFDM symbols used for PDCCH. The PHICH transmits acknowledgment information (for example, retransmission control information, HARQ-ACK, ACK / NACK, etc.) of HARQ (Hybrid Automatic Repeat Repeat request) for the PUSCH. The EPDCCH is frequency-division multiplexed with a PDSCH (Downlink Shared Data Channel) and used for transmission of DCI and the like like the PDCCH.

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

In the wireless communication system 1, as a downlink reference signal, a cell-specific reference signal (CRS: Cell-specific Reference Signal), a channel state information reference signal (CSI-RS: Channel State Information-Reference Signal), and a demodulation reference signal (DMRS: DeModulation Reference Signal, a position determination reference signal (PRS: Positioning Reference Signal), and the like are transmitted. 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 uplink reference signals. The DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal). The transmitted reference signal is not limited to these.

<Base station>
FIG. 10 is a diagram illustrating an example of an overall configuration of a base station according to one embodiment. The base station 10 includes a plurality of transmitting / receiving antennas 101, an amplifier unit 102, a transmitting / receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106. The transmitting / receiving antenna 101, the amplifier unit 102, and the transmitting / receiving unit 103 may be configured to include at least one each.

ユーザ User data transmitted from the base station 10 to the user terminal 20 by downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.

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

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

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

The baseband signal processing unit 104 performs fast Fourier transform (FFT: Fast Fourier Transform), inverse discrete Fourier transform (IDFT), and error correction on user data included in the input uplink signal. Decoding, reception processing of MAC retransmission control, reception processing of the RLC layer and PDCP layer are performed, and the data is transferred to the upper station apparatus 30 via the transmission path interface 106. The call processing unit 105 performs call processing (setting, release, etc.) of a communication channel, state management of the base station 10, management of radio resources, and the like.

The transmission path interface 106 transmits and receives signals to and from the higher-level station device 30 via a predetermined interface. The transmission line interface 106 transmits and receives signals (backhaul signaling) to and from another base station 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface). Is also good.

In addition, the transmission / reception unit 103 transmits a downlink (DL) signal to the user terminal 20 (for example, includes at least one of a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH) (DCI), and a DL reference signal). And receives an uplink (UL) signal (including at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUSCH), and a UL reference signal) from the user terminal 20.

{Also, transmitting / receiving section 103 may transmit upper layer parameters indicating a first modulation and coding scheme (MCS) table, and may transmit downlink control information for scheduling of a physical uplink shared channel.

FIG. 11 is a diagram illustrating an example of a functional configuration of the base station according to the embodiment. In this example, functional blocks of characteristic portions in the present embodiment are mainly shown, and base station 10 may be assumed to have 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. Note that these configurations need only be included in base station 10, and some or all of the configurations need not be included in baseband signal processing section 104.

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

The control unit 301 controls, for example, signal generation in the transmission signal generation unit 302, signal assignment in the mapping unit 303, and the like. Further, the control unit 301 controls a signal reception process in the reception signal processing unit 304, a signal measurement in the measurement unit 305, and the like.

The control unit 301 performs scheduling (for example, resources) of system information, a downlink data signal (for example, a signal transmitted on the PDSCH), and a downlink control signal (for example, a signal transmitted on the PDCCH and / or the EPDCCH; acknowledgment information and the like). Allocation). Further, control section 301 controls generation of a downlink control signal, a downlink data signal, and the like based on a result of determining whether or not retransmission control is required for an uplink data signal.

The control unit 301 controls scheduling of a synchronization signal (for example, PSS / SSS) and a downlink reference signal (for example, CRS, CSI-RS, DMRS).

{Also, the control unit 301 may control at least one of the modulation scheme and the coding rate of the physical uplink shared channel. Specifically, the control unit 301 may control generation and transmission of downlink control information including an index value indicating at least one of the modulation scheme and the coding rate of the physical uplink shared channel.

Transmission signal generation section 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from control section 301, and outputs the generated downlink signal to mapping section 303. The transmission signal generation unit 302 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present disclosure.

The transmission signal generation unit 302 generates a DL assignment for notifying downlink data allocation information and / or a UL grant for notifying uplink data allocation information, based on an instruction from the control unit 301, for example. The DL assignment and the UL grant are both DCI and follow the DCI format. In addition, the downlink data signal is subjected to an encoding process, a modulation process, and the like according to an encoding rate, a modulation method, and the like determined based on channel state information (CSI: Channel \ State \ Information) from each user terminal 20 or the like.

Mapping section 303 maps the downlink signal generated by transmission signal generating section 302 to a predetermined radio resource based on an instruction from control section 301, and outputs it to transmitting / receiving section 103. The mapping unit 303 can be configured from a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present disclosure.

(4) The reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, and the like) on the reception signal input from the transmission / reception unit 103. Here, the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20. The reception signal processing unit 304 can be configured from 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 disclosure.

(4) The reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when a PUCCH including HARQ-ACK is received, HARQ-ACK is output to control section 301. Further, the reception signal processing unit 304 outputs the reception signal and / or the signal after the reception processing to the measurement unit 305.

(4) The measurement unit 305 performs measurement on the received signal. The measurement unit 305 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present disclosure.

For example, the measurement unit 305 may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, or the like based on the received signal. The measurement unit 305 is configured to receive power (for example, RSRP (Reference Signal Received Power)), reception quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio, SNR (Signal to Noise Ratio)). , Signal strength (for example, RSSI (Received @ Signal @ Strength @ Indicator)), channel information (for example, CSI), and the like. The measurement result may be output to the control unit 301.

Further, the control unit 301, when the downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, based on at least one of the upper layer parameters and the downlink control information, At least one of an MCS table and an MCS index for a physical uplink shared channel may be determined.

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

(4) The radio frequency signal received by the transmitting / receiving antenna 201 is amplified by the amplifier unit 202. The transmission / reception unit 203 receives the downlink signal amplified by the amplifier unit 202. The transmission / reception section 203 converts the frequency of the received signal into a baseband signal, and outputs the baseband signal to the baseband signal processing section 204. The transmission / reception unit 203 can be configured from a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present disclosure. Note that the transmission / reception unit 203 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit.

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

On the other hand, 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 (eg, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like, and performs transmission / reception processing. Transferred to 203.

(4) 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 radio frequency band. The radio frequency signal frequency-converted by the transmitting / receiving section 203 is amplified by the amplifier section 202 and transmitted from the transmitting / receiving antenna 201.

Further, the transmission / reception unit 203 receives a downlink (DL) signal (for example, including at least one of a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH) (DCI), and a DL reference signal) from the base station 10. It receives and transmits an uplink (UL) signal (including at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUSCH), and a UL reference signal) to the base station 10.

{Also, the transmission / reception unit 203 may receive higher layer parameters indicating the first modulation and coding scheme (MCS) table, and may receive downlink control information for scheduling the physical uplink shared channel.

FIG. 13 is a diagram illustrating an example of a functional configuration of the user terminal according to the embodiment. Note that, in this example, functional blocks of characteristic portions in the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication.

The baseband signal processing unit 204 of 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. Note that these configurations need only be included in the user terminal 20, and some or all of the configurations need 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 configured by a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present disclosure.

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

The control unit 401 acquires the downlink control signal and the downlink data signal transmitted from the base station 10 from the reception signal processing unit 404. The control unit 401 controls generation of an uplink control signal and / or an uplink data signal based on a result of determining whether or not retransmission control is required for a downlink control signal and / or a downlink data signal.

When the control unit 401 acquires various information notified from the base station 10 from the reception signal processing unit 404, the control unit 401 may update parameters used for control based on the information.

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

(4) The transmission signal generation unit 402 generates an uplink control signal related to acknowledgment information, channel state information (CSI), and the like based on an instruction from the control unit 401, for example. Further, transmission signal generating section 402 generates an uplink data signal based on an instruction from control section 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the downlink control signal notified from the base station 10 includes a UL grant.

Mapping section 403 maps the uplink signal generated by transmission signal generation section 402 to a radio resource based on an instruction from control section 401, and outputs the result to transmission / reception section 203. The mapping unit 403 can be configured from a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present disclosure.

(4) The reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, and decoding) on the reception signal input from the transmission / reception unit 203. Here, the received signal is, for example, a downlink signal (a downlink control signal, a downlink data signal, a downlink reference signal, etc.) transmitted from the base station 10. The reception signal processing unit 404 can be configured from 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 disclosure. In addition, the reception signal processing unit 404 can configure a reception unit according to the present disclosure.

(4) 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 / or the signal after the reception processing to the measurement unit 405.

The measurement unit 405 performs measurement on the received signal. The measurement unit 405 can be configured from a measurement device, a measurement circuit, or a measurement device described based on common recognition in the technical field according to the present disclosure.

For example, the measurement unit 405 may perform RRM measurement, CSI measurement, and the like based on the received signal. The measurement unit 405 may measure reception power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), channel information (for example, CSI), and the like. The measurement result may be output to the control unit 401.

In addition, when the downlink control information indicates that there is no uplink transport channel (UL-SCH) corresponding to the physical uplink shared channel, the control unit 401 determines the upper layer parameter (for example, mcs-table) and the At least one of an MCS table and an MCS index for the physical uplink shared channel based on at least one of downlink control information (eg, UL-SCH indicator, RNTI used for scrambling CRC of the downlink control information). One may be determined.

Also, the downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, and a predetermined identifier (eg, a new RNTI) for scrambling a CRC of the downlink control information is not used. If the first MCS index indicated in the downlink control information is within a predetermined range (for example, a reserved MCS index), the control unit 401 transmits a predetermined MCS table (for example, a URLLC MCS table or an eMBB MCS table). , The second MCS index associated with the first index may be applied to the physical uplink shared channel (first mode).

Also, the downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, and the third MCS index indicated in the downlink control information is within a range different from a predetermined range (for example, unreserved). If it is (MCS index), the control unit 401 may apply the third MCS index to the physical uplink shared channel in the MCS table set by the upper layer parameters (first mode).

If the downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, and the fourth MCS index indicated in the downlink control information is within a predetermined range, the control unit 401 May apply the fourth MCS index to the physical uplink shared channel in a predetermined MCS table (for example, an MCS table for URLLC or an MCS table for eMBB) (third aspect).

Also, when the downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, the control unit 401 expects that the downlink control information indicates an index within a first range. (Second embodiment).

(Hardware configuration)
Note that the block diagram used in the description of the above-described embodiment shows blocks in functional units. These functional blocks (components) are realized by an arbitrary combination of at least one of hardware and software. In addition, a method for implementing each functional block is not particularly limited. That is, each functional block may be realized using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated from each other). , Wired, wireless, etc.) and using these multiple devices. The functional block may be realized by combining one device or the plurality of devices with software.

Here, the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. Not limited. For example, a functional block (constituent unit) that makes transmission function may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like. In any case, as described above, the realization method is not particularly limited.

For example, a base station, a user terminal, and the like according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method according to the present disclosure. FIG. 14 is a diagram illustrating an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 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. .

In the following description, the term “apparatus” can be read as a circuit, a device, a unit, or the like. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more devices illustrated in the drawing, or may be configured without including some devices.

For example, although only one processor 1001 is illustrated, there may be multiple processors. Further, the processing may be executed by one processor, or the processing may be executed by two or more processors simultaneously, sequentially, or by using another method. Note that the processor 1001 may be implemented by one or more chips.

The functions of the base station 10 and the user terminal 20 are performed, for example, by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002 so that the processor 1001 performs an arithmetic operation and communicates via the communication device 1004. And controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

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

The processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to 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 operation described in the above embodiment is used. For example, the control unit 401 of the user terminal 20 may be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks may be similarly implemented.

The memory 1002 is a computer-readable recording medium, and includes, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically EPROM), a RAM (Random Access Memory), and other appropriate storage media. It may be constituted by one. The memory 1002 may be called 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, and the like that can be executed to implement the wireless communication method according to an embodiment of the present disclosure.

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

The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a 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 a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). May be configured. For example, the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission line interface 106, and the like may be realized by the communication device 1004. The transmission / reception unit 103 may be mounted physically or logically separated between the transmission unit 103a and the reception unit 103b.

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

The devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using a different bus for each device.

In addition, the base station 10 and the user terminal 20 include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include hardware, and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these hardware.

(Modification)
Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meaning. For example, at least one of the channel and the symbol may be a signal (signaling). Also, the signal may be a message. The reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like according to an applied standard. A component carrier (CC: Component Carrier) may be called a cell, a frequency carrier, a carrier frequency, or the like.

The radio frame may be configured by one or a plurality of periods (frames) in the time domain. The one or more respective periods (frames) forming the radio frame may be referred to as a subframe. Furthermore, a subframe may be configured by one or more slots in the time domain. The subframe may be of a fixed length of time (eg, 1 ms) that does not depend on numerology.

Here, the new melology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology includes, for example, subcarrier interval (SCS: SubCarrier @ Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission @ Time @ Interval), number of symbols per TTI, radio frame configuration, transmission and reception. At least one of a specific filtering process performed by the transceiver in the frequency domain and a specific windowing process performed by the transceiver in the time domain may be indicated.

The slot may be configured by one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain. Further, the slot may be a time unit based on numerology.

The slot may include a plurality of mini slots. Each minislot may be constituted by one or more symbols in the time domain. Also, minislots may be called subslots. A minislot may be made up of a smaller number of symbols than slots. A PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.

Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may have different names corresponding thereto. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be interchanged with each other.

For example, one subframe may be called a transmission time interval (TTI: Transmission @ Time @ Interval), a plurality of consecutive subframes may be called a TTI, and one slot or one minislot is called a TTI. You may. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1 to 13 symbols), or a period longer than 1 ms. It may be. Note that the unit representing the TTI may be called a slot, a minislot, or the like instead of a subframe.

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

The TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, a code word, or a processing unit such as scheduling and link adaptation. Note that when a TTI is given, a time section (for example, the number of symbols) in which a transport block, a code block, a codeword, and the like are actually mapped may be shorter than the TTI.

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

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

Note that a long TTI (for example, a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (for example, a shortened TTI, etc.) may be replaced with a TTI shorter than the long TTI and 1 ms. The TTI having the TTI length described above may be replaced with the TTI.

The resource block (RB: Resource Block) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in the RB may be the same irrespective of the numerology, and may be, for example, 12. The number of subcarriers included in the RB may be determined based on numerology.

Ｒ Also, the RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, and the like may each be configured by one or a plurality of resource blocks.

Note that one or a plurality of RBs include a physical resource block (PRB: Physical @ RB), a subcarrier 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.

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

A bandwidth part (BWP: Bandwidth @ Part) (which may also be referred to as a partial bandwidth or the like) may represent a subset of contiguous common RBs (common @ resource @ blocks) for a certain numerology in a certain carrier. Good. Here, the common RB may be specified by an index of the RB based on the common reference point of the carrier. A PRB may be defined in a BWP and numbered within the BWP.

$ BWP may include a BWP for UL (UL @ BWP) and a BWP for DL (DL @ BWP). For a UE, one or more BWPs may be configured in one carrier.

少なくとも At least one of the configured BWPs may be active, and the UE may not have to assume transmitting and receiving a given signal / channel outside the active BWP. Note that “cell”, “carrier”, and the like in the present disclosure may be replaced with “BWP”.

The structures of the above-described radio frame, subframe, slot, minislot, and symbol are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, included in an RB The number of subcarriers, the number of symbols in a TTI, the symbol length, the configuration such as the cyclic prefix (CP) length can be variously changed.

Further, the information, parameters, and the like described in the present disclosure may be represented using an absolute value, may be represented using a relative value from a predetermined value, or may be represented using another corresponding information. May be represented. For example, a radio resource may be indicated by a predetermined index.

名称 Names used for parameters and the like in the present disclosure are not limited in any way. Further, the formulas and the like using these parameters may be different from those explicitly disclosed in the present disclosure. The various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements can be identified by any suitable name, so the various names assigned to these various channels and information elements Is not a limiting name in any way.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., that can be referred to throughout the above description are not limited to voltages, currents, electromagnetic waves, magnetic or magnetic particles, optical or photons, or any of these. May be represented by a combination of

情報 In addition, information, signals, and the like can be output from the upper layer to at least one of the lower layer and the lower layer to at least one of the upper layer. Information, signals, and the like may be input and output via a plurality of network nodes.

(4) Information and signals input and output may be stored in a specific location (for example, a memory) or may be managed using a management table. Information and signals that are input and output can be overwritten, updated, or added. The output information, signal, and the like may be deleted. The input information, signal, and the like may be transmitted to another device.

Notification of information is not limited to the aspect / embodiment described in the present disclosure, and may be performed using another method. For example, the information is notified by physical layer signaling (for example, downlink control information (DCI: Downlink Control Information), uplink control information (UCI: Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, It may be implemented by broadcast information (master information block (MIB: Master Information Block), system information block (SIB: System Information Block), etc.), MAC (Medium Access Control) signaling), other signals, or a combination thereof.

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

In addition, the notification of the predetermined information (for example, the notification of “X”) is not limited to an explicit notification, and is implicit (for example, by not performing the notification of the predetermined information or by another information). May be performed).

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 performed by comparing numerical values (for example, comparison with a predetermined value).

Software, regardless of whether it is called software, firmware, middleware, microcode, a hardware description language, or any other name, instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules , Applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

ソフトウェア In addition, software, instructions, information, and the like may be transmitted and received via a transmission medium. For example, if the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), the website, When transmitted from a server or other remote source, at least one of these wired and / or wireless technologies is included within the definition of a transmission medium.

用語 As used in this disclosure, the terms “system” and “network” may be used interchangeably.

In the present disclosure, “precoding”, “precoder”, “weight (precoding weight)”, “pseudo collocation (QCL: Quasi-Co-Location)”, “transmission power”, “phase rotation”, “antenna port” , "Antenna port group", "layer", "number of layers", "rank", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel", etc. The terms may be used interchangeably.

In the present disclosure, “base station (BS: Base @ Station)”, “wireless base station”, “fixed station (fixed @ station)”, “NodeB”, “eNodeB (eNB)”, “gNodeB (gNB)”, “ "Access point (access @ point)", "transmission point (TP: Transmission @ Point)", "reception point (RP: Reception @ Point)", "transmission / reception point (TRP: Transmission / Reception @ Point)", "panel", "cell" Terms such as, "sector", "cell group", "carrier", "component carrier" may be used interchangeably. A base station may be referred to by a term such as a macro cell, a small cell, a femto cell, a pico cell, and the like.

A base station can accommodate one or more (eg, three) cells. If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned 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 通信 Head)). The term "cell" or "sector" refers to part or all of the coverage area of at least one of a base station and a base station subsystem that provides communication services in this coverage.

In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user equipment” (UE), and “terminal” may be used interchangeably. .

A mobile station is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal. , A handset, a user agent, a mobile client, a client or some other suitable terminology.

少なくとも At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. Note that at least one of the base station and the mobile station may be a device mounted on the mobile unit, the mobile unit itself, or the like. The moving object may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving object (for example, a drone, a self-driving car, etc.), or a robot (maned or unmanned). ). Note that at least one of the base station and the mobile station includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

基地 In addition, the base station in the present disclosure may be replaced with a user terminal. For example, communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the configuration may be such that the user terminal 20 has the function of the base station 10 described above. Further, words such as “up” and “down” may be read as words corresponding to communication between terminals (for example, “side”). For example, an uplink channel, a downlink channel, and the like may be replaced with a side channel.

Similarly, the user terminal in the present disclosure may be replaced with a base station. In this case, the base station 10 may have the function of the user terminal 20 described above.

In the present disclosure, an operation performed by the base station may be performed by an upper node (upper node) in some cases. In a network including one or more network nodes having a base station (network @ nodes), various operations performed for communication with a terminal include a base station, one or more network nodes other than the base station (eg, Obviously, it can be performed by MME (Mobility @ Management @ Entity), S-GW (Serving-Gateway), etc., but not limited thereto, or a combination thereof.

各 Each aspect / embodiment described in the present disclosure may be used alone, may be used in combination, or may be switched and used in execution. Further, the processing procedure, sequence, flowchart, and the like of each aspect / embodiment described in the present disclosure may be interchanged as long as there is no inconsistency. For example, the methods described in this disclosure use various exemplary steps to present elements of the various steps, and are not limited to the specific order presented.

Each aspect / embodiment described in the present disclosure is applicable to 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 (Registered trademark) (Global System for Mobile Communications), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802. 20, UWB (Ultra-WideBand), Bluetooth (registered trademark) , A system using other suitable wireless communication methods, and a next-generation system extended based on these methods. A plurality of systems may be combined (for example, a combination of LTE or LTE-A and 5G) and applied.

記載 The term "based on" as used in the present disclosure does not mean "based solely on" unless stated otherwise. In other words, the description "based on" means both "based only on" and "based at least on."

いかなる Any reference to elements using designations such as "first," "second," etc., as used in this disclosure, does not generally limit the quantity or order of those elements. These designations may be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not mean that only two elements can be employed or that the first element must precede the second element in some way.

用語 The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "judgment (decision)" means judging, calculating, computing, processing, deriving, investigating, searching (up, search, inquiry) ( For example, a search in a table, database, or another data structure), ascertaining, etc., may be regarded as "deciding".

In addition, “determination” includes receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), and access ( accessing) (e.g., accessing data in a memory) or the like.

Also, “judgment (decision)” is regarded as “judgment (decision)” of resolving, selecting, selecting, establishing, comparing, and the like. Is also good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of any operation.

判断 Also, “judgment (decision)” may be read as “assuming”, “expecting”, “considering”, or the like.

The “maximum transmission power” described in the present disclosure may mean the maximum value of the transmission power, may mean the nominal maximum transmission power (the nominal UE maximum transmit power), or may refer to the rated maximum transmission power (the rated UE maximum transmit power).

As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements. And may include the presence of one or more intermediate elements between two elements "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.

In the present disclosure, where two elements are connected, using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-exhaustive examples, the radio frequency domain, microwave It can be considered to be "connected" or "coupled" to each other using electromagnetic energy having a wavelength in the region, the light (both visible and invisible) regions, and the like.

において In the present disclosure, the term “A and B are different” may mean that “A and B are different from each other”. The term may mean that “A and B are different from C”. Terms such as "separate" and "coupled" may be construed similarly to "different."

Where the terms “include”, “including” and variations thereof are used in the present disclosure, these terms are as inclusive as the term “comprising” Is intended. Further, the term "or" as used in the present disclosure is not intended to be an exclusive or.

In the present disclosure, if articles are added by translation, for example, a, an, and the in English, the present disclosure may include that the nouns following these articles are plural.

Although the invention according to the present disclosure has been described in detail above, it is obvious to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be embodied as modifications and changes without departing from the spirit and scope of the invention determined based on the description in the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not bring any restrictive meaning to the invention according to the present disclosure.

Claims

A receiving unit that receives upper layer parameters indicating a first modulation and coding scheme (MCS) table and receives downlink control information for scheduling a physical uplink shared channel;
When the downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, based on at least one of the higher layer parameters and the downlink control information, , A control unit that determines at least one of an MCS table and an MCS index.
The downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, a predetermined identifier for scrambling a CRC of the downlink control information is not used, and the downlink control information indicates The control unit, when the obtained first MCS index is within a predetermined range, applies the second MCS index associated with the first MCS index to the physical uplink shared channel in the first MCS table. 2. The user terminal according to 1.
When the downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, and the third MCS index indicated in the downlink control information is within a range different from the predetermined range, The user terminal according to claim 2, wherein the unit applies the third MCS index to the physical uplink shared channel in an MCS table set by the upper layer parameters.
If the downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, and the fourth MCS index indicated in the downlink control information is within a predetermined range, the control unit performs The user terminal according to claim 1, wherein in the MCS table, the fourth MCS index is applied to the physical uplink shared channel.
When the downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, the control unit expects the downlink control information to indicate an index within a first range, The user terminal according to claim 1, wherein
A transmitting unit that transmits upper layer parameters indicating a first modulation and coding scheme (MCS) table and transmits downlink control information for scheduling of a physical uplink shared channel;
When the downlink control information indicates that there is no uplink transport channel corresponding to the physical uplink shared channel, based on at least one of the higher layer parameters and the downlink control information, And a control unit that determines at least one of an MCS table and an MCS index.