JP2020182101A - Terminal device, base station device, and communication method - Google Patents

Abstract

To allow uplink transmission to be efficiently performed.SOLUTION: A terminal device receives a PDCCH and transmits a plurality of PUSCHs scheduled based at least on a DCI format included in the PDCCH. When the DCI format instructs a non-periodic CSI report, a DCI field UL-SCH indicator is applied to a first PUSCH on which the non-periodic CSI report is superposed among the PUSCHs, and the DCI field UL-SCH indicator is not applied to PUSCHs other than the first PUSCH among the PUSCHs.SELECTED DRAWING: Figure 6

Description

The present invention relates to a terminal device, a base station device, and a communication method.

Cellular mobile communication radio access scheme and a radio network (hereinafter, "Long Term Evolution (LTE)", or. Where: referred to as "EUTRA Evolved Universal Terrestrial Radio Access") is a third generation partnership project (3GPP: 3 ^rd Generation It is being considered in the Partnership Project). In LTE, the base station device is also called an eNodeB (evolved NodeB), and the terminal device is also called a UE (User Equipment). LTE is a cellular communication system in which a plurality of areas covered by a base station apparatus are arranged in a cell shape. A single base station device may manage multiple serving cells.

At 3GPP, the next-generation standard (NR: New Radio) will be examined in order to propose to IMT (International Mobile Telecommunication Union) -2020, which is the standard for next-generation mobile communication systems established by the International Telecommunication Union (ITU). (Non-Patent Document 1). NR is required to meet the requirements assuming three scenarios of eMBB (enhanced Mobile BroadBand), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communication) within the framework of a single technology. There is.

"New SID proposal: Study on New Radio Access Technology", RP-160671, NTT docomo, 3GPP TSG RAN Meeting # 71, Goteborg, Sweden, 7th-10th March, 2016.

The present invention provides a terminal device for efficient communication, a communication method used for the terminal device, a base station device for efficient communication, and a communication method used for the base station device.

(1) The first aspect of the present invention is a terminal device, in which a receiving unit that receives PDCCH and a transmitting unit that transmits a plurality of PUSCHs scheduled based on at least the DCI format included in the PDCCH. When the DCI format indicates an aperiodic CSI report, the DCI field UL-SCH indicator is applied to the first PUSCH in which the aperiodic CSI report is multiplexed among the plurality of PUSCHs. Among the plurality of PUSCHs, the DCI field UL-SCH indicator is not applied to PUSCHs other than the first PUSCH.

(2) A second aspect of the present invention is a terminal device, which includes a receiving unit that receives PDCCH and a transmitting unit that transmits PUSCH scheduled at least based on the DCI format included in the PDCCH. If the DCI format directs an aperiodic CSI report, one second PUSCH is scheduled, the aperiodic CSI report is multiplexed with the second PUSCH, and the DCI field UL-SCH is relative to the second PUSCH. Indicator includes being applied.

(3) A third aspect of the present invention is a terminal device including a receiving unit for receiving PDCCH and a transmitting unit for transmitting PUSCH scheduled at least based on the DCI format included in the PDCCH. If the DCI format directs aperiodic CSI reporting and one PUSCH is scheduled, the DCI field UL-SCH indicator included in the DCI format is effectively set and the DCI format directs aperiodic CSI reporting. In addition, when scheduling a plurality of PUSCHs, the DCI field UL-SCH indicator included in the DCI format is set to invalid.

(4) A fourth aspect of the present invention is a base station apparatus, which comprises a transmitting unit for transmitting PDCCH, a receiving unit for receiving a plurality of PUSCHs scheduled at least based on the DCI format included in the PDCCH, and the like. When the DCI format indicates an aperiodic CSI report, the DCI field UL-SCH indicator is set for the PUSCH in which the aperiodic CSI report is multiplexed among the plurality of PUSCHs.

(5) A fifth aspect of the present invention is a base station apparatus, which comprises a transmitting unit that transmits PDCCH, a receiving unit that receives a plurality of PUSCHs scheduled at least based on the DCI format included in the PDCCH, and the like. When the DCI format directs an aperiodic CSI report, one second PUSCH is scheduled, the aperiodic CSI report is multiplexed on the second PUSCH, and the DCI field is relative to the second PUSCH. Includes setting the UL-SCH indicator.

(6) A sixth aspect of the present invention is a base station apparatus, which comprises a transmitting unit that transmits PDCCH, a receiving unit that receives a plurality of PUSCHs scheduled at least based on the DCI format included in the PDCCH, and the like. When the DCI format directs aperiodic CSI reporting and one PUSCH is scheduled, the DCI field UL-SCH indicator included in the DCI format is effectively set, and the DCI format is an aperiodic CSI. Instructing reporting and scheduling multiple PUSCHs involves invalidating the DCI field UL-SCH indicator included in the DCI format.

(7) A seventh aspect of the present invention is a communication method used for a terminal device, which receives a PDCCH, transmits a plurality of PUSCHs scheduled at least based on the DCI format included in the PDCCH, and transmits the DCI. When the format indicates an aperiodic CSI report, the DCI field UL-SCH indicator is applied to the first PUSCH in which the aperiodic CSI report is multiplexed among the plurality of PUSCHs, and the plurality of PUSCHs. Among them, the DCI field UL-SCH indicator is not applied to PUSCHs other than the first PUSCH.

(8) An eighth aspect of the present invention is a communication method used for a terminal device, which is a communication method used for a terminal device, receives a PDCCH, and schedules based on at least the DCI format included in the PDCCH. When a plurality of PUSCHs are transmitted and the DCI format indicates an aperiodic CSI report, one second PUSCH is scheduled, the aperiodic CSI report is multiplexed with the second PUSCH, and the second PUSCH is performed. In contrast, the DCI field UL-SCH indicator includes applying.

(9) A ninth aspect of the present invention is a communication method used for a terminal device, which receives a PDCCH, transmits a plurality of PUSCHs scheduled at least based on the DCI format included in the PDCCH, and transmits the DCI. If the format directs aperiodic CSI reporting and one PUSCH is scheduled, the DCI field UL-SCH indicator included in the DCI format is effectively set and the DCI format directs aperiodic CSI reporting. Moreover, when scheduling a plurality of PUSCHs, the DCI field UL-SCH indicator included in the DCI format is set to be invalid.

(10) A tenth aspect of the present invention is a communication method used for a base station apparatus, in which a PDCCH is transmitted, and a plurality of PUSCHs scheduled based on at least the DCI format included in the PDCCH are received. When the DCI format indicates an aperiodic CSI report, the DCI field UL-SCH indicator is set for the first PUSCH in which the aperiodic CSI report is multiplexed among the plurality of PUSCHs.

(11) An eleventh aspect of the present invention is a communication method used in a base station apparatus, in which a PDCCH is transmitted, and a plurality of PUSCHs scheduled based on at least the DCI format included in the PDCCH are received. If the DCI format directs an aperiodic CSI report, one second PUSCH is scheduled, the aperiodic CSI report is multiplexed on the second PUSCH, and for the second PUSCH, the DCI field UL-SCH indicator Including setting.

(12) A twelfth aspect of the present invention is a communication method used for a base station apparatus, which transmits a PDCCH, receives a plurality of PUSCHs scheduled at least based on the DCI format included in the PDCCH, and receives the PDCCH. If the DCI format directs aperiodic CSI reporting and one PUSCH is scheduled, the DCI field UL-SCH indicator included in the DCI format is effectively set and the DCI format directs aperiodic CSI reporting. In addition, when scheduling a plurality of PUSCHs, the DCI field UL-SCH indicator included in the DCI format is invalidated.

According to the present invention, the terminal device can efficiently communicate. In addition, the base station device can efficiently perform communication.

It is a conceptual diagram of the wireless communication system which concerns on one aspect of this Embodiment. This is an example showing the relationship between the N ^slot _symb , the setting μ of the subcarrier interval, the slot setting, and the CP setting according to one aspect of the present embodiment. It is a schematic diagram which shows an example of the resource grid in the subframe which concerns on one aspect of this Embodiment. It is a schematic block diagram which shows the structure of the terminal apparatus 1 which concerns on one aspect of this Embodiment. It is a schematic block diagram which shows the structure of the base station apparatus 3 which concerns on one aspect of this Embodiment. A method of applying the DCI field UL-SCH indicator included in the DCI format to a PUSCH in which aperiodic CSI reports are multiplexed, among a plurality of PUSCHs scheduled by one DCI format according to one aspect of the present embodiment. It is a figure which shows. FIG. 5 shows a method according to an embodiment of the present embodiment in which a DCI format directing aperiodic CSI reporting schedules one PUSCH and the DCI field UL-SCH indicator included in the DCI format is applied to the PUSCH. is there.

Hereinafter, embodiments of the present invention will be described.

"A and / or B" may be a term that includes "A", "B", or "A and B".

When a parameter or information indicates one or more values, the parameter or information may include at least a parameter or information indicating the one or more values. The upper layer parameter may be a single upper layer parameter. The upper layer parameter may be an information element (IE) containing a plurality of parameters.

FIG. 1 is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment. In FIG. 1, the wireless communication system includes terminal devices 1A to 1C and a base station device 3. Hereinafter, the terminal devices 1A to 1C will also be referred to as a terminal device 1.

The base station apparatus 3 may be configured to include one or both of the MCG (Master Cell Group) and the SCG (Secondary Cell Group). An MCG is a group of serving cells composed of at least a PCell (Primary Cell). An SCG is a group of serving cells composed of at least PSCell (Primary Secondary Cell). The PCell may be a serving cell given based on the initial connection. The MCG may be configured to include one or more SCells (Secondary Cells). The SCG may be configured to include one or more SCells. A serving cell identity is a short identifier for identifying a serving cell. The serving cell identifier may be given by an upper layer parameter.

The frame configuration will be described below.

At least OFDM (Orthogonal Frequency Division Multiplex) is used in the wireless communication system according to one aspect of the present embodiment. The OFDM symbol is a unit of the OFDM time domain. The OFDM symbol comprises at least one or more subcarriers. The OFDM symbol may be converted into a time-continuous signal in the baseband signal generation.

The subcarrier interval (SCS: SubCarrier Spacing) is the subcarrier interval Δf = 2 ^μ・ 1.
It may be given by 5 kHz. For example, the subcarrier spacing configuration μ may be set to any of 0, 1, 2, 3, 4, and / or 5. For a BWP (BandWidth Part), the subcarrier spacing setting μ may be given by the upper layer parameters.

In the wireless communication system according to one aspect of the present embodiment, a time unit (time unit) T _c is used to express the length of the time domain. The time unit T _c may be given by T _c = 1 / (Δf _max · N _f ). Δf _max may be the maximum value of the subcarrier spacing supported in the wireless communication system according to one aspect of the present embodiment. Δf _max may be Δf _max = 480 kHz. N _f may be N _f = 4096. The constant κ is κ = Δf _max · N _f / (Δf _ref N _{f, ref} ) = 64. Δf _ref may be 15 kHz. N _{f and ref} may be 2048.

The constant κ may be a value indicating the relationship between the reference subcarrier interval and T _c . The constant κ may be used for the length of the subframe. The number of slots contained in the subframe may be given, at least based on the constant κ. Δf _ref is the reference subcarrier interval, and N _{f and ref} are values corresponding to the reference subcarrier interval.

The transmission on the downlink and / or the transmission on the uplink consists of a frame of 10 ms. The frame is composed of 10 subframes. The length of the subframe is 1 ms. The length of the frame may be given regardless of the subcarrier spacing Δf. That is, the frame setting may be given regardless of μ. The length of the subframe may be given regardless of the subcarrier spacing Δf. That is, the subframe setting may be given regardless of μ.

The number and index of slots contained in a subframe may be given for the setting μ of a subcarrier spacing. For example, the first slot number n ^mu _s is, ^{N subframe} in the subframe ^0, may be given in ascending order in the range of ^mu _slot -1. The number and index of slots contained in the frame may be given for the setting μ of the subcarrier spacing. For example, the second slot numbers n ^μ _{s, f} may be given in ascending order in the range of 0 to N ^{frame, μ} _slot -1 within the ^frame . One slot may contain consecutive N ^slot _symbs of OFDM symbols. The N ^slot _symb may be given at least based on some or all of the slot configuration and / or the CP (Cyclic Prefix) setting. The slot setting may be given by at least the upper layer parameter tdd-UL-DL-ConfigurationCommon. CP settings may be given at least based on upper layer parameters. CP settings may be given at least based on dedicated RRC signaling. The first slot number and the second slot number are also referred to as slot numbers (slot indexes).

FIG. 2 is an example showing the relationship between the N ^slot _symb , the setting μ of the subcarrier interval, and the CP setting according to one aspect of the present embodiment. In FIG. 2A, for example, when the subcarrier interval setting μ is 2 and the CP setting is normal CP (normal cyclic prefix), N ^slot _symb = 14, N ^{frame, μ} _slot = 40, N ^{subframe, μ} _slot. = 4. Further, in FIG. 2B, for example, when the subcarrier interval setting μ is 2 and the CP setting is an extended CP (extended cyclic prefix), N ^slot _symb = 12, N ^{frame, μ} _slot = 40, N ^{subframe, μ} _slot = 4.

The physical resources will be described below.

An antenna port is defined by the fact that the channel through which a symbol is transmitted in one antenna port can be estimated from the channel through which another symbol is transmitted in the same antenna port. If the large scale property of the channel on which the symbol is transmitted in one antenna port can be estimated from the channel in which the symbol is transmitted in the other antenna port, the two antenna ports are QCLs (Quasi Co-Located). ) Is called. Large-scale characteristics may include at least the long-interval characteristics of the channel. Large-scale characteristics include delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters. It may include at least some or all. The fact that the first antenna port and the second antenna port are QCL with respect to the beam parameters means that the receiving beam assumed by the receiving side with respect to the first antenna port and the receiving beam assumed by the receiving side with respect to the second antenna port. May be the same. The fact that the first antenna port and the second antenna port are QCL with respect to the beam parameters means that the transmitting beam assumed by the receiving side with respect to the first antenna port and the transmitting beam assumed by the receiving side with respect to the second antenna port. May be the same. The terminal device 1 assumes that the two antenna ports are QCLs when the large-scale characteristics of the channel through which the symbol is transmitted in one antenna port can be estimated from the channel in which the symbol is transmitted in the other antenna port. May be done. The fact that the two antenna ports are QCLs may mean that the two antenna ports are QCLs.

A resource grid of N ^μ _{RB, x} N ^RB _sc subcarriers and N ^(μ) _symb N ^{subframe, μ} _symb OFDM symbols is provided for each of the subcarrier spacing settings and carrier sets. N ^μ _{RB, x} may indicate the number of resource blocks given for setting the subcarrier spacing μ for carrier x. N ^μ _{RB, x} may be the maximum number of resource blocks given for setting the subcarrier spacing μ for carrier x. The carrier x indicates either a downlink carrier or an uplink carrier. That is, x is "DL" or "UL". N ^μ _RB is a name that includes N ^μ _{RB, DL} , and / or N ^μ _{RB, UL} . ^NRB _sc may indicate the number of subcarriers contained in one resource block. At least one resource grid may be provided for each antenna port p and / or for each subcarrier spacing setting μ and / or for each Transmission direction setting. The transmission direction includes at least a downlink (DL: DownLink) and an uplink (UL: UpLink). Hereinafter, a set of parameters including at least a part or all of the antenna port p, the subcarrier interval setting μ, and the transmission direction setting is also referred to as a first radio parameter set. That is, one resource grid may be given for each first set of radio parameters.

In the downlink, the carrier included in the serving cell is referred to as a downlink carrier (or downlink component carrier). In the uplink, the carrier included in the serving cell is referred to as an uplink carrier (uplink component carrier). The downlink component carrier and the uplink component carrier are collectively referred to as a component carrier (or carrier).

Each element in the resource grid given for each first set of radio parameters is referred to as a resource element. The resource element is specified by the frequency domain index k _sc and the time domain index l _sym . For a first set of radio parameters, resource elements are identified by a frequency domain index k _sc and a time domain index l _sym . The resource element specified by the frequency domain index k _sc and the time domain index l _sym is also referred to as a resource element (k _sc , l _sym ). The frequency domain index k _sc indicates any value from 0 to N ^μ _RB N ^RB _sc -1. N ^μ _RB may be the number of resource blocks given for setting the subcarrier spacing μ. N ^RB _sc is the number of subcarriers contained in the resource block, and N ^RB _sc = 12. The frequency domain index k _sc may correspond to the subcarrier index k _sc . The time domain index l _sym may correspond to the OFDM symbol index l _sym .

FIG. 3 is a schematic view showing an example of a resource grid in the subframe according to one aspect of the present embodiment. In the resource grid of FIG. 3, the horizontal axis is the time domain index l _sym , and the vertical axis is the frequency domain index k _sc . In one subframe, the frequency domain of the resource grid contains N ^μ _RB N ^RB _sc subcarriers. In one subframe, the time domain of the resource grid may contain 14.2 ^μ OFDM symbols. One resource block ^is configured to include ^N _{RB sc} subcarriers. The time domain of the resource block may correspond to a 1 OFDM symbol. The time domain of the resource block may correspond to 14 OFDM symbols. The time domain of the resource block may correspond to one or more slots. The time domain of the resource block may correspond to one subframe.

The terminal device 1 may be instructed to transmit and receive using only a subset of the resource grid. A subset of the resource grid, also referred to as BWP, may be given based on at least some or all of the upper layer parameters and / or DCI. BWP is also called a band part (BP: bandwidth part). That is, the terminal device 1
You do not have to be instructed to send and receive using the entire set of resource grids. That is, the terminal device 1 may be instructed to perform transmission / reception using a part of the frequency resources in the resource grid. One BWP may be composed of a plurality of resource blocks in the frequency domain. One BWP may be composed of a plurality of continuous resource blocks in the frequency domain. The BWP set for the downlink carrier is also referred to as the downlink BWP. The BWP set for the uplink carrier is also referred to as an uplink BWP.

One or more downlink BWPs may be set for the terminal device 1. The terminal device 1 may attempt to receive a physical channel (eg, PDCCH, PDSCH, SS / PBCH, etc.) on one of the downlink BWPs of one or more downlinks BWP. The one downlink BWP is also referred to as an activated downlink BWP.

One or more uplink BWPs may be set for the terminal device 1. The terminal device 1 may attempt to transmit a physical channel (eg, PUCCH, PUSCH, PRACH, etc.) in one of the uplink BWPs of one or more uplinks BWP. The one uplink BWP is also referred to as an activated uplink BWP.

A set of downlink BWPs may be set for each of the serving cells. A set of downlink BWPs may include one or more downlink BWPs. A set of uplink BWPs may be set for each of the serving cells. A set of uplink BWPs may include one or more uplink BWPs.

The upper layer parameter is a parameter included in the signal of the upper layer. The upper layer signal may be RRC (Radio Resource Control) signaling or MAC CE (Medium).
It may be an Access Control Control Element). Here, the signal of the upper layer is RRC
It may be a layer signal or a MAC layer signal.

The signal of the upper layer may be common RRC signaling. The common RRC signaling may include at least some or all of the following features C1 to C3.
Feature C1) Mapped to BCCH logical channel or CCCH logical channel Feature C2) Mapped to feature C3) PBCH containing at least a radioRelocationConfigCommon information element

The radioResourceConfigCommon information element may include information indicating a setting commonly used in the serving cell. The settings commonly used in the serving cell may include at least the PRACH setting. The PRACH setting may indicate at least one or more random access preamble indexes. The PRACH setting may indicate at least the PRACH time / frequency resources.

The upper layer signal may be dedicated RRC signaling. Dedicated RRC signaling may include at least some or all of the following features D1 to D2.
Feature D1) Map to DCCH logical channel Feature D2) Includes at least a radioResourceControlDedicated information element

The radioResourceControlDedicated information element may include at least information indicating settings specific to the terminal device 1. The radioResourceControlDedicated information element may include at least information indicating the setting of the BWP. The BWP settings may at least indicate the frequency resources of the BWP.

For example, the MIB, the first system information, and the second system information may be included in the common RRC signaling. Also, upper layer messages that are mapped to the DCCH logical channel and that include at least the radioResourceConfigCommon may be included in the common RRC signaling. Further, the upper layer message that is mapped to the DCCH logical channel and does not include the radioResourceConfigCommon information element may be included in the dedicated RRC signaling. Further, the upper layer messages that are mapped to the DCCH logical channel and include at least the radioResourceConfigDedicated information element may be included in the dedicated RRC signaling.

The first system information may at least indicate the time index of the SS (Synchronization Signal) block. The SS block is also referred to as an SS / PBCH block (SS / PBCH block). The SS / PBCH block is also referred to as SS / PBCH. The first system information may include at least information related to the PRACH resource. The first system information may include at least information related to the initial connection settings. The second system information may be system information other than the first system information.

The radioResourceControlDedicated information element may include at least information related to the PRACH resource. The radioResourceConfigDedicated information element may include at least information related to the initial connection settings.

Hereinafter, physical channels and physical signals according to various aspects of the present embodiment will be described.

The uplink physical channel may correspond to a set of resource elements that carry information that occurs in the upper layers. The uplink physical channel is a physical channel used in the uplink carrier. In the wireless communication system according to one aspect of the present embodiment, at least some or all of the following uplink physical channels are used.
・ PUCCH (Physical Uplink Control CHannel)
・ PUSCH (Physical Uplink Shared CHannel)
・ PRACH (Physical Random Access CHannel)

The PUCCH may be used to transmit Uplink Control Information (UCI). Uplink control information includes channel state information (CSI: Channel State Information), scheduling request (SR: Scheduling Request), and transport block (TB: Transport block, MAC PDU: Medium Access Control Protocol Data Uni).
t, DL-SCH: Downlink-Shared Channel, PDSCH: Physical Downlink Shared Channel), including part or all of HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement).

The HARQ-ACK may include at least the HARQ-ACK bits corresponding to one transport block. The HARQ-ACK bit may indicate ACK (acknowledgement) or NACK (negative-acknowledgement) corresponding to one or more transport blocks. HARQ-ACK is one or more HARQ-A
It may include at least a HARQ-ACK codebook containing CK bits. The fact that the HARQ-ACK bit corresponds to one or more transport blocks may mean that the HARQ-ACK bit corresponds to a PDSCH containing the one or more transport blocks. The HARQ-ACK bit may indicate ACK or NACK corresponding to one CBG (Code Block Group) included in the transport block.

Scheduling Request (SR) is a PUS for initial transmission.
It may at least be used to request CH resources. The scheduling request bit may be used to indicate either a positive SR (positive SR) or a negative SR (negative SR). The fact that the scheduling request bit indicates a positive SR is also referred to as "a positive SR is transmitted". A positive SR may indicate that the terminal device 1 requires a PUSCH resource for initial transmission. A positive SR may indicate that the scheduling request is Triggered by the upper layer. A positive SR may be sent when the upper layer instructs it to send a scheduling request. The fact that the scheduling request bit indicates a negative SR is also referred to as "a negative SR is transmitted". A negative SR may indicate that the terminal device 1 does not require PUSCH resources for initial transmission. A negative SR may indicate that the scheduling request is not triggered by the upper layer. Negative SR may be transmitted if the upper layer does not instruct it to transmit the scheduling request.

The channel state information may include at least a part or all of a channel quality indicator (CQI), a precoder matrix indicator (PMI), and a rank indicator (RI). CQI is an index related to channel quality (for example, propagation intensity), and PMI is an index indicating a precoder. RI is an index that indicates the transmission rank (or the number of transmission layers).

PUCCH supports PUCCH format (PUCCH format 0 to PUCCH format 4). The PUCCH format may be mapped to the PUCCH and transmitted. The PUCCH format may be transmitted in PUCCH. The transmission of the PUCCH format may mean that the PUCCH is transmitted.

PUSCH is at least used to transmit transport blocks (TB, MAC PDU, UL-SCH, PUSCH). PUSCH may be used to transmit at least some or all of the transport block, HARQ-ACK, channel state information, and scheduling requests. PUSCH is at least used to send the random access message 3.

PRACH is at least used to send a random access preamble (random access message 1). The PRACH is part or all of the initial connection establishment procedure, the handover procedure, the connection re-establishment procedure, the synchronization (timing adjustment) for the transmission of the PUSCH, and the request for resources for the PUSCH. At least may be used to indicate. The random access preamble may be used to notify the base station device 3 of an index (random access preamble index) given by the upper layer of the terminal device 1.

In FIG. 1, the following uplink physical signals are used in the uplink wireless communication. The uplink physical signal does not have to be used to transmit the information output from the upper layer, but it is used by the physical layer.
・ UL DMRS (UpLink Demodulation Reference Signal)
・ SRS (Sounding Reference Signal)
・ UL PTRS (UpLink Phase Tracking Reference Signal)

UL DMRS is associated with PUSCH and / or transmission of PUCCH. UL
DMRS is multiplexed with PUSCH or PUCCH. The base station apparatus 3 may use UL DMRS to perform the propagation path correction of PUSCH or PUCCH. Hereinafter, transmitting the PUSCH and the UL DMRS related to the PUSCH together is referred to simply as transmitting the PUSCH. Hereinafter, transmitting PUCCH and UL DMRS related to the PUCCH together is referred to simply as transmitting PUCCH. UL DMRS related to PUSCH is also referred to as UL DMRS for PUSCH. UL DMRS related to PUCCH is also referred to as UL DMRS for PUCCH.

The SRS need not be associated with the transmission of PUSCH or PUCCH. The base station apparatus 3 may use SRS for measuring the channel state. The SRS may be transmitted at the end of the subframe in the uplink slot, or at a predetermined number of OFDM symbols from the end.

UL PTRS may be at least a reference signal used for phase tracking. The UL PTRS may be associated with a UL DMRS group that includes at least the antenna ports used for one or more UL DMRSs. The association between the UL PTRS and the UL DMRS group may be that some or all of the antenna ports of the UL PTRS and the antenna ports included in the UL DMRS group are at least QCL. The UL DMRS group may be identified at least based on the antenna port with the smallest index in the UL DMRS included in the UL DMRS group. UL PTRS may be mapped to the antenna port with the lowest index in one or more antenna ports to which one codeword is mapped. UL PTRS may be mapped to the first layer if one codeword is at least mapped to the first layer and the second layer. UL PTRS does not have to be mapped to the second layer. The index of the antenna port to which the UL PTRS is mapped may be given at least based on the downlink control information.

In FIG. 1, the following downlink physical channels are used in the downlink wireless communication from the base station device 3 to the terminal device 1. The downlink physical channel is used by the physical layer to transmit the information output from the upper layer.
・ PBCH (Physical Broadcast Channel)
・ PDCCH (Physical Downlink Control Channel)
・ PDSCH (Physical Downlink Shared Channel)

PBCH is a master information block (MIB: Master Information Block,
BCH, Broadcast Channel) is at least used to transmit. The PBCH may be transmitted based on a predetermined transmission interval. PBCH may be transmitted at intervals of 80 ms. PBCH may be transmitted at intervals of 160 ms. The content of the information contained in the PBCH may be updated every 80 ms. Some or all of the information contained in the PBCH may be updated every 160 ms. The PBCH may be composed of 288 subcarriers. The PBCH may be configured to include 2, 3, or 4 OFDM symbols. The MIB may include information related to the identifier (index) of the synchronization signal. The MIB may include information indicating at least a portion of the slot number, subframe number, and / or radio frame number through which the PBCH is transmitted.

PDCCH is at least used for the transmission of downlink control information (DCI). The PDCCH may be transmitted including at least downlink control information. The PDCCH may include downlink control information. The downlink control information is also referred to as DCI format. The downlink control information may include at least either a downlink grant or an uplink grant. The DCI format used for PDSCH scheduling is also referred to as the downlink DCI format. The DCI format used for PUSCH scheduling is also referred to as the uplink DCI format. Downlink grants are also referred to as downlink assignments or downlink allocations. The uplink DCI format includes at least one or both of DCI format 0_0 and DCI format 0_1.

DCI format 0_0 is configured to include at least part or all of 1A to 1F.
1A) Identifier for DCI formats field
1B) Frequency domain resource allocation field (Frequency domain resource allocation)
field)
1C) Time domain resource allocation field
)
1D) Frequency hopping flag field
1E) MCS field (MCS field: Modulation and Coding Scheme field)

The DCI format specific field may be at least used to indicate whether the DCI format containing the DCI format specific field corresponds to one or more DCI formats. The one or more DCI formats may be given at least on the basis of DCI format 1_1, DCI format 1-11, DCI format 0_0, and / or part or all of DCI format 0_1.

The frequency domain resource allocation field may be at least used to indicate the frequency resource allocation for the PUSCH scheduled by the DCI format containing the frequency domain resource allocation field. The frequency domain resource allocation field is also referred to as an FDRA (Frequency Domain Resource Allocation) field.

The time domain resource allocation field may be at least used to indicate the allocation of time resources for the PUSCH scheduled by the DCI format containing the time domain resource allocation field.

The frequency hopping flag field may be at least used to indicate whether frequency hopping is applied to the PUSCH scheduled by the DCI format containing the frequency hopping flag field.

The MCS field may be used at least to indicate the modulation scheme for PUSCH scheduled by the DCI format containing the MCS field and / or part or all of the target code rate. The target code rate may be the target code rate for the transport block of the PUSCH. The size of the transport block (TBS) may be given at least based on the target code rate.

DCI format 0-1 is configured to include at least part or all of 2A to 2G.
2A) DCI format specific field 2B) Frequency domain resource allocation field 2C) Time domain resource allocation field 2D) Frequency hopping flag field 2E) MCS field 2F) CSI request field
2G) BWP field
2H) first UL DAI field (1 ^st downlink assignment index)
2I) the second of UL DAI field (2 ^nd downlink assignment index)

The first UL DAI field is at least used to indicate the transmission status of the PDSCH. When a Dynamic HARQ-ACK codebook is used, the size of the first UL DAI field may be 2 bits.

The second UL DAI field is at least used to indicate the transmission status of the PDSCH. If a dynamic HARQ-ACK codebook containing two sub-codebooks is used, the size of the second UL DAI field may be 2 bits.

The BWP field may be used to indicate the uplink BWP to which the PUSCH scheduled in DCI format 0_1 is mapped.

The CSI request field is at least used to direct CSI reporting. The size of the CSI request field may be given at least based on the upper layer parameter ReportTriggerSize.

The downlink DCI format includes at least one or both of DCI format 1_0 and DCI format 1_1.

DCI format 1_0 is configured to include at least some or all of 3A to 3H.
3A) Identifier for DCI formats field
3B) Frequency domain resource allocation field (Frequency domain resource allocation)
field)
3C) Time domain resource allocation field
)
3D) Frequency hopping flag field
3E) MCS field (MCS field: Modulation and Coding Scheme field)
3F) First CSI request field
3G) PDSCH-to-HARQ feedback timing indicator field
3H) PUCCH resource indicator field

The timing instruction field from PDSCH to HARQ feedback may be a field indicating timing K1. When the index of the slot containing the last OFDM symbol of the PDSCH is slot n, the index of the PUCCH containing at least HARQ-ACK corresponding to the transport block contained in the PDSCH or the slot containing the PUSCH is n + K1. May be good. When the index of the slot containing the last OFDM symbol of the PDSCH is slot n, the first OFDM symbol of the PUCCH or the first OFDM symbol of the PUSCH containing at least HARQ-ACK corresponding to the transport block contained in the PDSCH The index of the included slot may be n + K1.

Hereinafter, the PDSCH-to-HARQ feedback timing indicator field (PDSCH-to-HARQ_feedback timing indicator field) may be referred to as a HARQ instruction field.

The PUCCH resource indicator field may be a field indicating the index of one or more PUCCH resources included in the PUCCH resource set.

The DCI format 1-1-1 is configured to include at least a part or all of 4A to 4J.
4A) Identifier for DCI formats field
4B) Frequency domain resource allocation field (Frequency domain resource allocation)
field)
4C) Time domain resource allocation field
)
4D) Frequency hopping flag field
4E) MCS field (MCS field: Modulation and Coding Scheme field)
4F) First CSI request field
4G) PDSCH-to-HARQ feedback timing indicator field
4H) PUCCH resource indicator field
4J) BWP field

The BWP field may be used to indicate the downlink BWP to which the PDSCH scheduled in DCI format 1-11 is mapped.

The DCI format 2_0 may be configured to include at least one or more Slot Format Indicators (SFIs).

In various aspects of this embodiment, unless otherwise stated, the number of resource blocks indicates the number of resource blocks in the frequency domain.

The downlink grant is at least used for scheduling one PDSCH in one serving cell.

Uplink grants are used at least for scheduling one PUSCH in one serving cell.

One physical channel may be mapped to one serving cell. One physical channel may be mapped to one BWP set for one carrier contained in one serving cell.

The terminal device 1 may be set with one or more control resource sets (CORESET: COntrol REsource SET). Terminal device 1 monitors PDCCH in one or more control resource sets. Here, PD in one or more control resource sets
Monitoring the CCH may include monitoring one or more PDCCHs corresponding to each of the one or more control resource sets. The PDCCH may include one or more sets of PDCCH candidates and / or PDCCH candidates. Monitoring the PDCCH may also include monitoring and detecting the PDCCH and / or the DCI format transmitted via the PDCCH.

The control resource set may indicate a time frequency domain to which one or more PDCCHs can be mapped. The control resource set may be an area in which the terminal device 1 monitors the PDCCH. The control resource set may be composed of continuous resources (Localized resources). The control resource set may consist of distributed resources.

In the frequency domain, the unit of mapping of the control resource set may be a resource block. For example, in the frequency domain, the unit of mapping of the control resource set may be 6 resource blocks. In the time domain, the control resource set mapping unit may be an OFDM symbol. For example, in the time domain, the unit of mapping of the control resource set may be 1 OFDM symbol.

The mapping of control resource sets to resource blocks may be given at least based on upper layer parameters. The upper layer parameter may include a bitmap for a resource block group (RBG). The group of resource blocks may be given by six consecutive resource blocks.

The number of OFDM symbols that make up the control resource set may be given at least based on the upper layer parameters.

A control resource set is a common control resource set.
) May be. The common control resource set may be a control resource set that is commonly set for a plurality of terminal devices 1. The common control resource set may be given at least based on the MIB, the first system information, the second system information, the common RRC signaling, and some or all of the cell IDs. For example, the time and / or frequency resources of the control resource set set to monitor the PDCCH used for scheduling the first system information may be given at least based on the MIB.

The control resource set set in the MIB is also referred to as CORESET # 0. CORESET # 0 may be a control resource set at index # 0.

A control resource set may be a dedicated control resource set. The dedicated control resource set may be a control resource set that is set to be used exclusively for the terminal device 1. The dedicated control resource set may be given based on at least some or all of the dedicated RRC signaling and C-RNTI values. A plurality of control resource sets may be configured in the terminal device 1, and an index (control resource set index) may be assigned to each control resource set. One or more control channel elements (CCE) may be configured in the control resource set, and an index (CCE index) may be assigned to each CCE.

The set of PDCCH candidates monitored by the terminal device 1 may be defined in terms of the search area. That is, the set of PDCCH candidates monitored by the terminal device 1 may be given by the search area.

The search area has one or more aggregation level PDCCH candidates.
Alternatively, it may be configured to include a plurality. The aggregation level of PDCCH candidates may indicate the number of CCEs constituting the PDCCH. PDDCH candidates may be mapped to one or more CCEs.

The terminal device 1 may monitor at least one or a plurality of search areas in a slot in which DRX (Discontinuous reception) is not set. DRX may be given at least based on upper layer parameters. The terminal device 1 may monitor at least one or a plurality of search space sets in the slot in which the DRX is not set. A plurality of search area sets may be configured in the terminal device 1. An index (search area set index) may be assigned to each search area set.

The search area set may be configured to include at least one or more search areas. An index (search area index) may be assigned to each search area.

Each of the search area sets may be associated with at least one control resource set. Each of the search area sets may be included in one control resource set. For each of the search area sets, an index of the control resource set associated with the search area set may be given.

The monitoring periodicity of the search area set may be set for each of the search area sets. The monitoring interval of the search area set may indicate at least the interval of the slots in which the search area set is monitored by the terminal device 1. Upper layer parameters indicating at least the monitoring interval of the search area set may be given for each search area set.

For each of the search area sets, a monitoring offset of the search area set may be set. The monitoring offset of the search area set may at least indicate an offset from the reference index (for example, slot # 0) of the index of the slot in which the terminal device 1 monitors the search area set. Upper layer parameters indicating at least the monitoring offset of the search area set may be given for each search area set.

A monitoring pattern of the search area set may be set for each of the search area sets. The monitoring pattern of the search area set may indicate the leading OFDM symbol for the search area set in which monitoring is performed. The monitoring pattern of the search region set may be provided by a bitmap showing the leading OFDM symbol in one or more slots. Upper layer parameters indicating at least the monitoring pattern of the search area set may be given for each search area set.

The monitoring occasion of the search area set is the monitoring interval of the search area set.
The monitoring offset of the search area set, the monitoring pattern of the search area set, and / or D
It may be given at least based on some or all of the RX settings.

The physical resource of the search area is the control channel element (CCE).
Consists of. CCE is composed of a predetermined number of resource element groups (REGs). For example, CCE may consist of 6 REGs. The REG may be composed of one OFDM symbol of one PRB (Physical Resource Block). That is, the REG may be configured to include 12 resource elements (RE: Resource Element). PRB is also simply referred to as RB (Resource Block).

PDSCH is at least used to transmit transport blocks. The PDSCH may at least be used to send a random access message 2 (random access response). The PDSCH may at least be used to transmit system information, including parameters used for initial access.

In FIG. 1, the following downlink physical signals are used in downlink wireless communication. The downlink physical signal does not have to be used to transmit the information output from the upper layer, but it is used by the physical layer.
-Synchronization signal (SS)
・ DL DMRS (DownLink DeModulation Reference Signal)
・ CSI-RS (Channel State Information-Reference Signal)
・ DL PTRS (DownLink Phase Tracking Reference Signal)

The synchronization signal is used by the terminal device 1 to synchronize the downlink frequency domain and / or the time domain. The synchronization signal includes PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal).

The SS block (SS / PBCH block) is composed of PSS, SSS, and at least a part or all of PBCH.

DL DMRS is associated with the transmission of PBCH, PDCCH, and / or PDSCH. DL DMRS is multiplexed on PBCH, PDCCH, and / or PDSCH. The terminal device 1 may use the PBCH, the PDCCH, or the DL DMRS corresponding to the PDSCH to perform propagation path correction of the PBCH, PDCCH, or PDSCH.

The CSI-RS may be at least a signal used to calculate channel state information. The pattern of CSI-RS assumed by the terminal device may be given by at least the upper layer parameters.

The PTRS may be at least the signal used to compensate for phase noise. The pattern of PTRS envisioned by the terminal device may be given at least based on the upper layer parameters and / or DCI.

The DL PTRS may be associated with a DL DMRS group that includes at least the antenna ports used for one or more DL DMRSs.

The downlink physical channel and the downlink physical signal are also referred to as a downlink physical signal. Uplink physical channels and uplink physical signals are also referred to as uplink signals. The downlink signal and the uplink signal are also collectively referred to as a physical signal. The downlink signal and the uplink signal are also collectively referred to as a signal. The downlink physical channel and the uplink physical channel are collectively referred to as a physical channel. The downlink physical signal and the uplink physical signal are collectively referred to as a physical signal.

BCH (Broadcast CHannel), UL-SCH (Uplink-Shared CHannel) and DL-SCH (Downlink-Shared CHannel) are transport channels. Channels used in the Medium Access Control (MAC) layer are called transport channels. The unit of transport channel used in the MAC layer is also called a transport block (TB) or MAC PDU. HARQ (Hybrid Automatic Repeat reQuest) is controlled for each transport block in the MAC layer. A transport block is a unit of data that the MAC layer delivers to the physical layer. In the physical layer, the transport block is mapped to a codeword, and modulation processing is performed for each codeword.

The base station device 3 and the terminal device 1 exchange (transmit / transmit) signals of the upper layer in the upper layer. For example, the base station device 3 and the terminal device 1 may send and receive RRC signaling (RRC message: Radio Resource Control message; RRC information: Radio Resource Control information) in the radio resource control (RRC: Radio Resource Control) layer. .. Further, the base station device 3 and the terminal device 1 may transmit and receive a MAC CE (Control Element) in the MAC layer. Here, RRC signaling and / or MAC CE is also referred to as higher layer signaling.

PUSCH and PDSCH may at least be used to transmit RRC signaling and / or MAC CE. Here, the RRC signaling transmitted from the base station device 3 by PDSCH may be a signal common to a plurality of terminal devices 1 in the serving cell. Signaling common to a plurality of terminal devices 1 in a serving cell is also referred to as common RRC signaling. The RRC signaling transmitted from the base station apparatus 3 by PDSCH may be a dedicated signaling (also referred to as dedicated signaling or UE specific signaling) for a certain terminal apparatus 1. Signaling dedicated to the terminal device 1 is also referred to as dedicated RRC signaling. The upper layer parameters unique to the serving cell may be transmitted using common signaling to a plurality of terminal devices 1 in the serving cell, or using dedicated signaling to a certain terminal device 1. UE-specific upper layer parameters may be transmitted to a terminal device 1 using dedicated signaling.

BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel), and DCCH (Dedicated Control CHannel) are logical channels. For example
BCCH is an upper layer channel used to transmit MIBs. Further, CCCH (Common Control CHannel) is an upper layer channel used for transmitting common information in a plurality of terminal devices 1. Here, CCCH may be used, for example, for a terminal device 1 that is not RRC-connected. Further, the DCCH (Dedicated Control CHannel) is an upper layer channel that is at least used for transmitting dedicated control information to the terminal device 1. Here, the DCCH may be used, for example, for the terminal device 1 connected by RRC.

BCCH in a logical channel may be mapped to BCH, DL-SCH, or UL-SCH in a transport channel. CCCH in a logical channel may be mapped to DL-SCH or UL-SCH in a transport channel. DCCH in the logical channel is DL in the transport channel
It may be mapped to -SCH or UL-SCH.

UL-SCH in the transport channel may be mapped to PUSCH in the physical channel. The DL-SCH in the transport channel may be mapped to the PDSCH in the physical channel. BCH in the transport channel may be mapped to PBCH in the physical channel.

Hereinafter, a configuration example of the terminal device 1 according to one aspect of the present embodiment will be described.

FIG. 4 is a schematic block diagram showing the configuration of the terminal device 1 according to one aspect of the present embodiment. As shown in the figure, the terminal device 1 includes a wireless transmission / reception unit 10 and an upper layer processing unit 14. The radio transmission / reception unit 10 includes at least a part or all of an antenna unit 11, an RF (Radio Frequency) unit 12, and a baseband unit 13. The upper layer processing unit 14 includes at least a part or all of the medium access control layer processing unit 15 and the radio resource control layer processing unit 16. The wireless transmission / reception unit 10 is also referred to as a transmission unit, a reception unit, or a physical layer processing unit.

The upper layer processing unit 14 outputs the uplink data (transport block) generated by the user's operation or the like to the wireless transmission / reception unit 10. The upper layer processing unit 14 processes the MAC layer, the packet data integration protocol (PDCP: Packet Data Convergence Protocol) layer, the radio link control (RLC: Radio Link Control) layer, and the RRC layer.

The medium access control layer processing unit 15 included in the upper layer processing unit 14 processes the MAC layer.

The radio resource control layer processing unit 16 included in the upper layer processing unit 14 processes the RRC layer. The wireless resource control layer processing unit 16 manages various setting information / parameters of its own device. The radio resource control layer processing unit 16 sets various setting information / parameters based on the signal of the upper layer received from the base station apparatus 3. That is, the radio resource control layer processing unit 16 sets various setting information / parameters based on the information indicating various setting information / parameters received from the base station apparatus 3. The setting information may include information related to processing or setting of a physical channel, a physical signal (that is, a physical layer), a MAC layer, a PDCP layer, an RLC layer, and an RRC layer. The parameter may be an upper layer parameter.

The wireless transmission / reception unit 10 performs physical layer processing such as modulation, demodulation, coding, and decoding. The wireless transmission / reception unit 10 separates, demodulates, and decodes the received physical signal, and outputs the decoded information to the upper layer processing unit 14. The wireless transmission / reception unit 10 generates a physical signal by modulating, encoding, and generating a baseband signal (converting to a time continuous signal), and transmits the physical signal to the base station apparatus 3.

The RF unit 12 converts the signal received via the antenna unit 11 into a baseband signal by orthogonal demodulation (down conversion), and removes unnecessary frequency components. The RF unit 12 outputs the processed analog signal to the baseband unit.

The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband portion 13 removes a portion corresponding to CP (Cyclic Prefix) from the converted digital signal, performs a fast Fourier transform (FFT) on the signal from which the CP has been removed, and outputs a signal in the frequency domain. Extract.

The baseband unit 13 performs inverse fast Fourier transform (IFFT) on the data to generate an OFDM symbol, adds CP to the generated OFDM symbol, generates a baseband digital signal, and basebands the data. Converts a band digital signal into an analog signal. The baseband unit 13 outputs the converted analog signal to the RF unit 12.

The RF unit 12 removes an extra frequency component from the analog signal input from the baseband unit 13 using a low-pass filter, up-converts the analog signal to the carrier frequency, and transmits the analog signal via the antenna unit 11. To do. Further, the RF unit 12 amplifies the electric power. Further, the RF unit 12 may have a function of controlling the transmission power. The RF unit 12 is also referred to as a transmission power control unit.

Hereinafter, a configuration example of the base station device 3 according to one aspect of the present embodiment will be described.

FIG. 5 is a schematic block diagram showing the configuration of the base station device 3 according to one aspect of the present embodiment. As shown in the figure, the base station apparatus 3 includes a wireless transmission / reception unit 30 and an upper layer processing unit 34. The radio transmission / reception unit 30 includes an antenna unit 31, an RF unit 32, and a baseband unit 33. The upper layer processing unit 34 includes a medium access control layer processing unit 35 and a radio resource control layer processing unit 36. The wireless transmission / reception unit 30 is also referred to as a transmission unit, a reception unit, or a physical layer processing unit.

The upper layer processing unit 34 processes the MAC layer, PDCP layer, RLC layer, and RRC layer.

The medium access control layer processing unit 35 included in the upper layer processing unit 34 processes the MAC layer.

The radio resource control layer processing unit 36 included in the upper layer processing unit 34 processes the RRC layer. The wireless resource control layer processing unit 36 generates downlink data (transport block), system information, RRC message, MAC CE, etc. arranged in the PDSCH, or acquires them from a higher-level node and outputs them to the wireless transmission / reception unit 30. .. Further, the wireless resource control layer processing unit 36 manages various setting information / parameters of each terminal device 1. The wireless resource control layer processing unit 36 may set various setting information / parameters for each terminal device 1 via a signal of the upper layer. That is, the radio resource control layer processing unit 36 transmits / notifies information indicating various setting information / parameters. The setting information may include information related to processing or setting of a physical channel, a physical signal (that is, a physical layer), a MAC layer, a PDCP layer, an RLC layer, and an RRC layer. The parameter may be an upper layer parameter.

Since the function of the wireless transmission / reception unit 30 is the same as that of the wireless transmission / reception unit 10, the description thereof will be omitted.

Each portion of the terminal device 1 with reference numerals 10 to 16 may be configured as a circuit. Each of the portions of the base station apparatus 3 with reference numerals 30 to 36 may be configured as a circuit.

The terminal device 1 may carry out carrier sense prior to transmission of the physical signal. Further, the base station apparatus 3 may perform carrier sense prior to transmission of the physical signal. Carrier sense may be to perform energy detection on a radio channel. Whether or not the physical signal can be transmitted may be given based on the carrier sense performed prior to the transmission of the physical signal. For example, if the amount of energy detected by the carrier sense performed prior to the transmission of the physical signal is greater than a predetermined threshold, the physical channel may not be transmitted or cannot be transmitted. May be determined. Further, when the amount of energy detected by the carrier sense performed prior to the transmission of the physical signal is smaller than a predetermined threshold value, the physical channel may be transmitted or can be transmitted. It may be judged. Further, when the amount of energy detected by the carrier sense performed prior to the transmission of the physical signal is equal to a predetermined threshold value, the transmission of the physical channel may or may not be performed. .. That is, when the amount of energy detected by the carrier sense performed prior to the transmission of the physical signal is equal to a predetermined threshold value, it may be determined that the transmission is impossible or the transmission is possible. Good.

The procedure for giving permission to transmit a physical channel based on the carrier sense is LBT (Listen).
Also called Before Talk). The situation in which it is determined that the physical signal cannot be transmitted as a result of LBT is also referred to as a busy state or a busy state. For example, the busy state may be a state in which the amount of energy detected by carrier sense is larger than a predetermined threshold value. Further, the situation in which it is determined that the physical signal can be transmitted as a result of LBT is also referred to as an idle state or an idle. For example, the idle state may be a state in which the amount of energy detected by carrier sense is smaller than a predetermined threshold value.

The terminal device 1 may multiplex the uplink control information (UCI) on the PUCCH and transmit it.
The terminal device 1 may multiplex the UCI to the PUSCH and transmit it. UCI is a downlink channel state information (CSI), a scheduling request (SR) indicating a PUSCH resource request, and a downlink data (Transport block, Medium Access Control Protocol Data Unit: MAC PDU, Downlink). -At least one of HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) for Shared Channel: DL-SCH, Physical Downlink Shared Channel (PDSCH) may be included.

HARQ control for one transport block (TB) may be referred to as the HARQ process. HARQ control can operate in parallel for multiple transport blocks (TB). A HARQ process identifier may be associated with each HARQ process.

Aperiodic CSI is a channel state information report that is performed aperiodically. The aperiodic CSI may be indicated at least based on the DCI format. The aperiodic CSI may be indicated at least based on the code point of the CSI request field included in the DCI format being set to a predetermined value. Aperiodic CSI is A-CSI
Also called (Aperiodic CSI).

The DCI field UL-SCH indicator included in the DCI format is used to indicate whether the PUSCH scheduled by the DCI format is accompanied by (or contains) uplink data (UL-SCH, transport block). May be good. For example, if the value of the DCI field UL-SCH indicator is set to 1, it may be indicated that the PUSCH is transmitted with (including) uplink data. For example, if the value of the DCI field UL-SCH indicator is set to 0, it may be indicated that the PUSCH is transmitted without (without) uplink data. The terminal device 1 may determine whether to replicate uplink data to the PUSCH scheduled by the DCI format, at least based on the value of the DCI field UL-SCH indicator included in the DCI format.

The aperiodic CSI may be transmitted (reported) via PUSCH. Aperiodic CSI reports may be multiplexed on PUSCH with uplink data. Aperiodic CSI reports may be multiplexed on PUSCH without uplink data. The terminal device 1 may transmit the aperiodic CSI report via the PUSCH with the uplink data, or may transmit the aperiodic CSI report via the PUSCH without the uplink data. The DCI field UL-SCH indicator may be set to 1 if the aperiodic CSI report is multiplexed on the PUSCH with uplink data. The DCI field UL-SCH indicator may be set to 0 if the aperiodic CSI report is multiplexed on the PUSCH with uplink data. The terminal device 1 indicates that the value of the aperiodic CSI request field included in the DCI format indicates an aperiodic CSI report, and the value of the DCI field UL-SCH indicator included in the DCI format is 1. The aperiodic CSI report may be transmitted via PUSCH, scheduled in DCI format and with uplink data. The terminal device 1 indicates that the value of the aperiodic CSI request field included in the DCI format indicates the aperiodic CSI report, and the value of the DCI field UL-SCH indicator included in the DCI format is 0. The aperiodic CSI report may be transmitted via PUSCH, scheduled in DCI format and without uplink data. That is, the aperiodic CSI may be transmitted via the PUSCH without the uplink data indicated by the value 0 of the DCI field UL-SCH indicator.

If the DCI format directing the aperiodic CSI report schedules one PUSCH, the aperiodic CSI report may be multiplexed on the PUSCH. If the DCI format directing the aperiodic CSI report schedules a plurality of PUSCHs, the aperiodic CSI report may be multiplexed on one first PUSCH of the plurality of PUSCHs. That is, the first PUSCH in which the aperiodic CSI reports are multiplexed may be selected from among the plurality of PUSCHs. For example, the first PUSCH may be the last PUSCH, the penultimate PUSCH, the first PUSCH, or the first PUSCH among the plurality of PUSCHs. It may be the second PUSCH.

If the DCI format for scheduling a plurality of PUSCHs includes one DCI field UL-SCH indicator, the DCI field UL-SCH indicator may be applied to a specific PUSCH among the plurality of PUSCHs. If the DCI format for scheduling multiple PUSCHs includes a DCI field UL-SCH indicator for each PUSCH, the plurality of DCI fields UL-SCH indicators may be applied to each of the plurality of PUSCHs.

If the DCI format for scheduling multiple PUSCHs includes one CSI request field, the CSI request field may be applied to a specific PUSCH among the plurality of PUSCHs. If the DCI format for scheduling multiple PUSCHs includes CSI request fields for each PUSCH, the plurality of CSI request fields may be applied to each of the plurality of PUSCHs.

When the DCI format indicating the aperiodic CSI report schedules a plurality of PUSCHs, the DCI field UL-SCH indicator included in the DCI format is applied to the PUSCH in which the aperiodic CSI reports are multiplexed among the plurality of PUSCHs. May be done. That is, among the plurality of PUSCHs, the DCI field UL-SCH included in the DCI format is used for the PUSCH in which the aperiodic CSI reports are multiplexed.
The indicator may be valid. The DCI field UL-SCH indicator included in the DCI format may not be applied to PUSCHs other than PUSCHs in which aperiodic CSI reports are multiplexed among the plurality of PUSCHs. That is, among the plurality of PUSCHs, the DCI field UL-SCH indicator included in the DCI format may be invalid for PUSCHs other than PUSCHs in which aperiodic CSI reports are multiplexed. That is, the terminal device 1 may consider the value of the DCI field UL-SCH indicator included in the DCI format for the PUSCH in which the aperiodic CSI report is multiplexed among the plurality of PUSCHs, or the aperiodic CSI report may be multiplexed. In addition to PUSCH in which CSI reports are multiplexed, it is not necessary to consider the value of the DCI field UL-SCH indicator included in the DCI format for PUSCH. In this way, by clarifying the effective range of the DCI field UL-SCH indicator, the uplink scheduling efficiency can be improved.

FIG. 6 shows the DCI field UL-SCH indicator included in the DCI format among the plurality of PUSCHs scheduled by one DCI format according to one aspect of the present embodiment in the PUSCH in which aperiodic CSI reports are multiplexed. It is a figure which shows the application method.

For example, in the first example, DCI format 6 indicating the aperiodic CSI report 602.
01 schedules PUSCH 603, PUSCH 604, PUSCH 605, and PUSCH 606. PUSCH 603, PUSCH 604, PUSCH 605, and PUSCH 606 may each correspond to a different HARQ process identifier. PUSCH 603, PUSCH 604, PUSCH 605, and PUSCH 606 may correspond to the same HARQ process identifier. The aperiodic CSI report 602 is multiplexed on the penultimate PUSCH 605. The DCI field UL-SCH indicator included in DCI format 601 may be applied to PUSCH 605 in which the aperiodic CSI report 602 is multiplexed. The DCI field UL-SCH indicator included in DCI format 601 may not apply to PUSCH 603, PUSCH 604, or PUSCH 606.

In the second example, the DCI format 611 indicating the aperiodic CSI report 612 schedules PUSCH 613 and PUSCH 614. The aperiodic CSI report 612 is multiplexed on the final PUSCH 614. The DCI field UL-SCH indicator included in DCI format 611 may be applied to PUSCH 614 where the aperiodic CSI report 612 is multiplexed. The DCI field UL-SCH indicator included in DCI format 611 does not have to be applied to PUSCH 613.

The DCI format indicating aperiodic CSI reporting may schedule one second PUSCH. That is, when aperiodic CSI reporting is indicated, the plurality of PUSCHs need not be scheduled in one DCI format. The aperiodic CSI report may be multiplexed on a second PUSCH. The DCI field UL-SCH indicator included in the DCI format may be applied to the second PUSCH. In this way, it is possible to improve the uplink scheduling efficiency by avoiding unnecessary scheduling of a plurality of PUSCHs in a situation where aperiodic CSI reporting is instructed and there is no uplink data. ..

FIG. 7 shows a method according to an embodiment of the present embodiment in which a DCI format indicating aperiodic CSI reporting schedules one PUSCH and the DCI field UL-SCH indicator included in the DCI format is applied to the PUSCH. It is a figure which shows.

In FIG. 7, the DCI format 701 indicating the aperiodic CSI report 702 schedules the PUSCH 703. The aperiodic CSI report 702 is multiplexed on PUSCH 703. The DCI field UL-SCH indicator included in DCI format 701 may be applied to PUSCH 703 where the aperiodic CSI report 702 is multiplexed.

If the DCI format directing aperiodic CSI reporting schedules multiple PUSCHs, the DCI field UL-SCH indicator contained in the DCI format will (or include) uplink data for each of the multiple PUSCHs. It may indicate whether or not. The aperiodic CSI report may be multiplexed on a PUSCH with a UL-SCH indicator set to 0. When the value of the aperiodic CSI request field included in the DCI format indicates an aperiodic CSI report, the terminal device 1 uses the PUSCH in which the value of the UL-SCH indicator included in the DCI format is set to 0. Periodic CSI reports may be sent.

The DCI format may have a field that specifies the number N of PUSCHs that are actually scheduled out of the maximum number of PUSCHs that can be scheduled by the DCI format. Alternatively, the DCI format may have a field that specifies the number N of slots in which the PUSCH is actually scheduled, out of the maximum number of slots for which the PUSCH can be scheduled by the DCI format. If the value of the aperiodic CSI request field contained in this DCI format indicates an aperiodic CSI report, then the aperiodic CSI is reported in one or more of the multiple PUSCHs scheduled by this DCI format. May be good. Alternatively, if the value of the aperiodic CSI request field contained in this DCI format indicates an aperiodic CSI report, then the aperiodic CSI in one or more of the slots for which PUSCH is scheduled by this DCI format. May be reported. At that time, when N = 1, the UL-SCH indicator in the DCI format is valid, and when N = 1 other than (for example, N> 1), the UL-SCH indicator in the DCI format is invalid. May be good. Here, the fact that the UL-SCH indicator is valid means that the terminal device 1 refers to the UL-SCH indicator field to determine whether or not the scheduled PUSCH includes the UL-SCH. May be good. Further, the fact that the UL-SCH indicator is invalid may mean that the terminal device 1 determines that the scheduled PUSCH includes the UL-SCH regardless of the value of the UL-SCH indicator field. Alternatively, when N = 1, the UL-SCH indicator in the DCI format can take either a value of 1 or 0, and when N = 1 other than (for example, N> 1), the UL-SCH indicator in the DCI format is UL-. The SCH indicator may always take a value of 1 (ie, in this case, the terminal device 1 does not have to expect the value of the UL-SCH indicator to be 0).

The DCI format may have a field dedicated to the UL-SCH indicator or a shared field that specifies the UL-SCH indicator and other information. For example, one field may indicate the value of N and whether the PUSCH contains UL-SCH. In this case, for example, the first value indicated by the field may mean that N = 1 and the PUSCH includes UL-SCH. Further, the second value indicated by the field may mean that N = 1 and PUSCH does not include UL-SCH. Further, each of the third and subsequent values indicated by the field may mean that each of the N values with N> 1 and that PUSCH includes UL-SCH.

Hereinafter, aspects of various devices according to one aspect of the present embodiment will be described.

(1) In order to achieve the above object, the aspect of the present invention has taken the following measures. That is, the first aspect of the present invention is a terminal device, which includes a receiving unit for receiving PDCCH and a transmitting unit for transmitting a plurality of PUSCHs scheduled based on at least the DCI format included in the PDCCH. When the DCI format indicates an aperiodic CSI report, the DCI field UL-SCH indicator is applied to the first PUSCH in which the aperiodic CSI report is multiplexed among the plurality of PUSCHs. The DCI field UL-SCH indicator is not applied to PUSCHs other than the first PUSCH among the PUSCHs of the above.

(2) A second aspect of the present invention is a terminal device, which includes a receiving unit that receives PDCCH and a transmitting unit that transmits PUSCH scheduled at least based on the DCI format included in the PDCCH. If the DCI format directs an aperiodic CSI report, one second PUSCH is scheduled, the aperiodic CSI report is multiplexed with the second PUSCH, and the DCI field UL-SCH is relative to the second PUSCH. Indicator includes being applied.

(3) A third aspect of the present invention is a terminal device including a receiving unit for receiving PDCCH and a transmitting unit for transmitting PUSCH scheduled at least based on the DCI format included in the PDCCH. If the DCI format directs aperiodic CSI reporting and one PUSCH is scheduled, the DCI field UL-SCH indicator included in the DCI format is effectively set and the DCI format directs aperiodic CSI reporting. In addition, when scheduling a plurality of PUSCHs, the DCI field UL-SCH indicator included in the DCI format is set to invalid.

(4) A fourth aspect of the present invention is a base station apparatus, which comprises a transmitting unit for transmitting PDCCH, a receiving unit for receiving a plurality of PUSCHs scheduled at least based on the DCI format included in the PDCCH, and the like. When the DCI format indicates an aperiodic CSI report, the DCI field UL-SCH indicator is set for the PUSCH in which the aperiodic CSI report is multiplexed among the plurality of PUSCHs.

(5) A fifth aspect of the present invention is a base station apparatus, which comprises a transmitting unit that transmits PDCCH, a receiving unit that receives a plurality of PUSCHs scheduled at least based on the DCI format included in the PDCCH, and the like. When the DCI format directs an aperiodic CSI report, one second PUSCH is scheduled, the aperiodic CSI report is multiplexed on the second PUSCH, and the DCI field is relative to the second PUSCH. Includes setting the UL-SCH indicator.

(6) A sixth aspect of the present invention is a base station apparatus, which comprises a transmitting unit that transmits PDCCH, a receiving unit that receives a plurality of PUSCHs scheduled at least based on the DCI format included in the PDCCH, and the like. When the DCI format directs aperiodic CSI reporting and one PUSCH is scheduled, the DCI field UL-SCH indicator included in the DCI format is effectively set, and the DCI format is an aperiodic CSI. Instructing reporting and scheduling multiple PUSCHs involves invalidating the DCI field UL-SCH indicator included in the DCI format.

The program that operates in the base station device 3 and the terminal device 1 according to the present invention is a program that controls a CPU (Central Processing Unit) or the like (makes a computer function) so as to realize the functions of the above-described embodiment related to the present invention. It may be a program). The information handled by these devices is temporarily stored in RAM (Random Access Memory) during the processing.
After that, various ROMs such as Flash ROM (Read Only Memory) and HD
It is stored in D (Hard Disk Drive), and is read, modified, and written by the CPU as needed.

Note that the terminal device 1 and a part of the base station device 3 in the above-described embodiment may be realized by a computer. In that case, the program for realizing this control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed.

The "computer system" referred to here is a computer system built in the terminal device 1 or the base station device 3, and includes hardware such as an OS and peripheral devices. Further, the "computer-readable recording medium" refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, or a CD-ROM, or a storage device such as a hard disk built in a computer system.

Furthermore, a "computer-readable recording medium" is a medium that dynamically holds a program for a short period of time, such as a communication line when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In that case, a program may be held for a certain period of time, such as a volatile memory inside a computer system serving as a server or a client. Further, the above-mentioned program may be a program for realizing a part of the above-mentioned functions, and may be a program for realizing the above-mentioned functions in combination with a program already recorded in the computer system.

The terminal device 1 may consist of at least one processor and at least one memory including computer program instructions (computer programs). The memory and the computer program instruction (computer program) may be configured such that the terminal device 1 performs the operations and processes described in the above-described embodiment by using a processor. The base station apparatus 3 may consist of at least one processor and at least one memory including computer program instructions (computer programs). The memory and the computer program instruction (computer program) may be configured such that the base station apparatus 3 performs the operations and processes described in the above-described embodiment by using a processor.

Further, the base station device 3 in the above-described embodiment can also be realized as an aggregate (device group) composed of a plurality of devices. Each of the devices constituting the device group may include a part or all of each function or each function block of the base station device 3 according to the above-described embodiment. As the device group, it suffices to have each function or each function block of the base station device 3. Further, the terminal device 1 according to the above-described embodiment can also communicate with the base station device as an aggregate.

Further, the base station apparatus 3 in the above-described embodiment may be EUTRAN (Evolved Universal Terrestrial Radio Access Network) and / or NG-RAN (NextGen RAN, NR RAN). Further, the base station apparatus 3 in the above-described embodiment may have a part or all of the functions of the upper node with respect to the eNodeB and / or the gNB.

Further, a part or all of the terminal device 1 and the base station device 3 in the above-described embodiment may be realized as an LSI which is typically an integrated circuit, or may be realized as a chipset. Each functional block of the terminal device 1 and the base station device 3 may be individually chipped, or a part or all of them may be integrated into a chip. Further, the method of making an integrated circuit is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. Further, when an integrated circuit technology that replaces an LSI appears due to advances in semiconductor technology, it is also possible to use an integrated circuit based on this technology.

Further, in the above-described embodiment, the terminal device is described as an example of the communication device, but the present invention is not limited to this, and the present invention is not limited to this, and is a stationary or non-movable electronic device installed indoors or outdoors. For example, it can be applied to terminal devices or communication devices such as AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other living equipment.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like within a range not deviating from the gist of the present invention are also included. Further, the present invention can be variously modified within the scope of the claims, and the technical scope of the present invention also includes embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is done. In addition, the elements described in each of the above-described embodiments include a configuration in which elements having the same effect are replaced with each other.

1 (1A, 1B, 1C) Terminal device 3 Base station device 10, 30 Wireless transmission / reception section 11, 31 Antenna section 12, 32 RF section 13, 33 Baseband section 14, 34 Upper layer Processing section 15, 35 Medium access control layer Processing unit 16, 36 Radio resource control layer processing unit

Claims (12)

A receiver that receives PDCCH and
A transmitter for transmitting a plurality of PUSCHs scheduled based on at least the DCI format included in the PDCCH.
If the DCI format dictates aperiodic CSI reporting,
Among the plurality of PUSCHs, the DCI field UL-SCH indicator is applied to the first PUSCH in which the aperiodic CSI report is multiplexed.
A terminal device to which the DCI field UL-SCH indicator is not applied to PUSCHs other than the first PUSCH among the plurality of PUSCHs. A receiver that receives PDCCH and
A transmitter for transmitting a PUSCH scheduled at least based on the DCI format included in the PDCCH.
If the DCI format dictates aperiodic CSI reporting,
One second PUSCH is scheduled and
The aperiodic CSI report was multiplexed on the second PUSCH to
The DCI field UL-SCH indicator is a terminal device to which the DCI field UL-SCH indicator is applied to the second PUSCH. A receiver that receives PDCCH and
A transmitter for transmitting a PUSCH scheduled at least based on the DCI format included in the PDCCH.
If the DCI format directs aperiodic CSI reporting and schedules one PUSCH
The DCI field UL-SCH indicator included in the DCI format is effectively set.
If the DCI format directs aperiodic CSI reporting and schedules multiple PUSCHs
The DCI field UL-SCH indicator included in the DCI format is a terminal device set to invalid. A transmitter that transmits PDCCH and
A receiver that receives a plurality of PUSCHs scheduled based on at least the DCI format included in the PDCCH.
If the DCI format dictates aperiodic CSI reporting,
A base station apparatus that sets a DCI field UL-SCH indicator for a PUSCH in which the aperiodic CSI reports are multiplexed among the plurality of PUSCHs. A transmitter that transmits PDCCH and
A receiver that receives a plurality of PUSCHs scheduled based on at least the DCI format included in the PDCCH.
If the DCI format dictates aperiodic CSI reporting,
Scheduling one second PUSCH,
The aperiodic CSI report is multiplexed on the second PUSCH.
A base station device that sets the DCI field UL-SCH indicator for the second PUSCH. A transmitter that transmits PDCCH and
A receiver that receives a plurality of PUSCHs scheduled based on at least the DCI format included in the PDCCH.
If the DCI format directs aperiodic CSI reporting and schedules one PUSCH
The DCI field UL-SCH indicator included in the DCI format is effectively set, and the DCI field UL-SCH indicator is effectively set.
If the DCI format directs aperiodic CSI reporting and schedules multiple PUSCHs
A base station device that invalidates the DCI field UL-SCH indicator included in the DCI format. A communication method used for terminal devices.
Receive PDCCH,
A plurality of PUSCHs scheduled based on at least the DCI format included in the PDCCH are transmitted.
If the DCI format dictates aperiodic CSI reporting,
Among the plurality of PUSCHs, the DCI field UL-SCH indicator is applied to the first PUSCH in which the aperiodic CSI report is multiplexed.
A communication method including the fact that the DCI field UL-SCH indicator is not applied to PUSCHs other than the first PUSCH among the plurality of PUSCHs. A communication method used for terminal devices.
Receive PDCCH,
A plurality of PUSCHs scheduled based on at least the DCI format included in the PDCCH are transmitted.
If the DCI format dictates aperiodic CSI reporting,
One second PUSCH is scheduled and
The aperiodic CSI report was multiplexed on the second PUSCH to
A communication method comprising applying the DCI field UL-SCH indicator to the second PUSCH. A communication method used for terminal devices.
Receive PDCCH,
A plurality of PUSCHs scheduled based on at least the DCI format included in the PDCCH are transmitted.
If the DCI format directs aperiodic CSI reporting and schedules one PUSCH
The DCI field UL-SCH indicator included in the DCI format is effectively set.
If the DCI format directs aperiodic CSI reporting and schedules multiple PUSCHs
A communication method including the DCI field UL-SCH indicator included in the DCI format being set to invalid. A communication method used for base station equipment.
Send PDCCH,
Receives a plurality of PUSCHs scheduled at least based on the DCI format contained in the PDCCH.
If the DCI format dictates aperiodic CSI reporting,
A communication method comprising setting the DCI field UL-SCH indicator for the first PUSCH in which the aperiodic CSI reports are multiplexed among the plurality of PUSCHs. A communication method used for base station equipment.
Send PDCCH,
Receives a plurality of PUSCHs scheduled at least based on the DCI format contained in the PDCCH.
If the DCI format dictates aperiodic CSI reporting,
Scheduling one second PUSCH,
The aperiodic CSI report is multiplexed on the second PUSCH.
A communication method including setting the DCI field UL-SCH indicator for the second PUSCH. A communication method used for base station equipment.
Send PDCCH,
Receives a plurality of PUSCHs scheduled at least based on the DCI format contained in the PDCCH.
If the DCI format directs aperiodic CSI reporting and schedules one PUSCH
The DCI field UL-SCH indicator included in the DCI format is effectively set, and the DCI field UL-SCH indicator is effectively set.
If the DCI format directs aperiodic CSI reporting and schedules multiple PUSCHs
A communication method comprising invalidating the DCI field UL-SCH indicator included in the DCI format.

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