Terminal device, base station device, and method

Abstract

The present invention is provided with: a reception unit which receives PTRS-UplinkConfig and Downlink Control Information (DCI) format; and a transmission unit which transmits Physical Uplink Shared Channel (PUSCH) and Phase Tracking Reference Signal (PT-RS) on the basis of the PTRS-UplinkConfig and the value of a Frequency Domain Resource Assignment (FDRA) field included in the DCI format. The transmission unit does not transmit the PT-RS in the case when the value of the FDRA field shows that the bandwidth scheduled for the PUSCH is smaller than 1 Physical Resource Block (PRB) while transform precoding is enabled, but transmits the PT-RS together with the PUSCH in the case when the FDRA field value shows that the bandwidth scheduled for the PUSCH is less than 1 PRB and a higher-layer parameter is set up, indicating that coverage enhancement is enabled.

Description

[Technical field]

[0001] The present invention relates to a terminal device, a base station device, and a method. This application claims priority to Japanese Patent Application No. 2019-215375, filed in Japan on November 28, 2019, the contents of which are incorporated herein by reference. [Background technology]

[0002] A wireless access method and wireless network for cellular mobile communication (hereinafter referred to as "LTE (Long Term Evolution)" or "EUTRA (Evolved Universal Terrestrial Radio Access)") is being developed by the Third Generation Partnership Project (3GPP). rd The LTE standard is being considered in the LTE Generation Partnership Project. In LTE, a base station device may be called an evolved NodeB (eNodeB), and a terminal device may be called User Equipment (UE). LTE is a cellular communication system in which a base station device covers a plurality of areas arranged in the form of cells. One base station device may manage one or multiple serving cells.

[0003] 3GPP is currently studying the next-generation wireless communication standard (NR: New Radio) to propose it for IMT (International Mobile Telecommunication)-2020, a standard for next-generation mobile communication systems formulated by the International Telecommunication Union (ITU) (Non-Patent Document 1). NR is required to meet the requirements for three scenarios, eMBB (enhanced Mobile BroadBand), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communication), within a single technology framework.

[0004] Furthermore, studies are being conducted on coverage enhancement to expand and improve the communication area and communication scenario of wireless communication methods and / or wireless communication systems that apply NR Radio Access Technology (NR-RAT) (Non-Patent Document 2). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] "New SID proposal: Study on New Radio Access Technology", RP-160671, NTT DOCOMO, 3GPP TSG RAN Meeting #71, Goteborg, Sweden, 7th - 10th March, 2016. [Non-Patent Document 2] "Summary of email discussion on NR coverage enhancement", RP-191886, China Telecommunication Corp., 3GPP TSG RAN Meeting #85, Newport Beach, USA, 16th - 19th September, 2019. Summary of the Invention [Problem to be solved by the invention]

[0006] One aspect of the present invention provides a terminal device that efficiently performs communication, a method used in the terminal device, a base station device, and a method used in the base station device. [Means for solving the problem]

[0007] (1) A first aspect of the present invention is a terminal device comprising: a receiving unit that receives a PTRS-Uplink Config and a Downlink Control Information (DCI) format; and a transmitting unit that transmits a Physical Uplink Shared Channel (PUSCH) and a Phase Tracking Reference Signal (PT-RS) based on a value of a Frequency Domain Resource Assignment (FDRA) field included in the PTRS-Uplink Config and the DCI format, wherein when modified precoding is enabled, if the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than one Physical Resource Block (PRB), the transmitting unit does not transmit the PT-RS, and if the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than one PRB and an upper layer parameter indicating that coverage enhancement is enabled is set, the transmitting unit transmits the PT-RS together with the PUSCH.

[0008] (2) A second aspect of the present invention is a base station device comprising: a transmitting unit that transmits a PTRS-Uplink Config and a Downlink Control Information (DCI) format; and a receiving unit that receives a Physical Uplink Shared Channel (PUSCH) and a Phase Tracking Reference Signal (PT-RS) based on a value of a Frequency Domain Resource Assignment (FDRA) field included in the PTRS-Uplink Config and the DCI format, wherein when modified precoding is set to be enabled and coverage enhancement is set to be enabled, the receiving unit receives the PUSCH assuming that the PT-RS is included in the PUSCH, regardless of the bandwidth scheduled for the PUSCH.

[0009] (3) A third aspect of the present invention is a method for use in a terminal device, comprising the steps of: receiving a PTRS-Uplink Config and a Downlink Control Information (DCI) format; transmitting a Physical Uplink Shared Channel (PUSCH) and a Phase Tracking Reference Signal (PT-RS) based on a value of a Frequency Domain Resource Assignment (FDRA) field included in the PTRS-Uplink Config and the DCI format; not transmitting the PT-RS when modified precoding is enabled and the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than one Physical Resource Block (PRB); and transmitting the PT-RS together with the PUSCH when the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than one PRB and an upper layer parameter indicating that coverage enhancement is enabled is set.

[0010] A fourth aspect of the present invention is a method used in a base station device, comprising the steps of: transmitting a PTRS-Uplink Config and a Downlink Control Information (DCI) format; receiving a Physical Uplink Shared Channel (PUSCH) and a Phase Tracking Reference Signal (PT-RS) based on a value of a Frequency Domain Resource Assignment (FDRA) field included in the PTRS-Uplink Config and the DCI format; and, when modified precoding is set to be enabled and coverage enhancement is set to be enabled, receiving the PUSCH assuming that the PT-RS is included therein, regardless of the bandwidth scheduled for the PUSCH. Effect of the Invention

[0011] According to one aspect of the present invention, a terminal device can perform efficient communication, and a base station device can perform efficient communication. [Brief description of the drawings]

[0012] [Figure 1] 1 is a conceptual diagram of a wireless communication system according to an embodiment of the present invention. [Diagram 2] 13 is an example showing a relationship between Nslot symb, an SCS setting μ, and a CP setting according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a schematic diagram illustrating an example of a resource grid in a subframe according to an aspect of the present embodiment. [Figure 4] FIG. 2 is a diagram illustrating an example of a relationship between a PUCCH format and a length NPUCCH symb of the PUCCH format according to an embodiment of the present invention. [Diagram 5] 1 is a schematic block diagram showing a configuration of a terminal device 1 according to an aspect of the present embodiment. [Figure 6] FIG. 2 is a schematic block diagram showing a configuration of a base station device 3 according to an aspect of the present embodiment. [Figure 7] FIG. 13 is a diagram showing a table used to provide respective thresholds ptrs-MCSi given by timeDensity and frequencyDensity according to one embodiment of the present invention, and a mapping pattern of PT-RS based on NRBi and scheduled MCS (IMCS) and bandwidth (NRB). [Figure 8] FIG. 2 is a diagram showing an MCS index table 1 (an example of an MCS index table) according to an aspect of the present embodiment. [Figure 9] FIG. 2 is a diagram showing an MCS index table 2 (another example 1 of the MCS index table) according to one aspect of the present embodiment. [Figure 10] FIG. 2 is a diagram showing an MCS index table 3 (another example 2 of the MCS index table) according to one aspect of the present embodiment. [Figure 11] FIG. 2 is a flow diagram illustrating a set of one or more time indexes l defined relative to the start of a PDSCH configuration according to one embodiment of the present invention. [Figure 12] A figure showing an example of a calculation formula used to estimate the subcarrier k to which the PT-RS is mapped in one embodiment of this embodiment. [Figure 13] FIG. 13 is a diagram showing a correspondence relationship of kRE ref according to one aspect of this embodiment. [Figure 14] FIG. 13 is a table illustrating an αPUSCH PTRS according to one embodiment of the present invention. [Figure 15] FIG. 13 is a diagram showing a PUSCH DM-RS configuration type according to one aspect of the present embodiment. [Figure 16] A figure showing the PT-RS scaling factor when modified precoding is enabled in one embodiment of this invention. [Figure 17] 11 is a diagram showing sequence generation of a PT-RS for a PUSCH when modified precoding according to one embodiment of the present invention is not enabled. FIG. [Figure 18] 11 is a diagram showing sequence generation of a PT-RS for a PUSCH when modified precoding according to one embodiment of the present invention is enabled. FIG. [Figure 19] FIG. 2 is a diagram illustrating an example of an orthogonal sequence w(i) according to an aspect of the present embodiment. [Figure 20] A diagram showing PT-RS mapping according to one embodiment of this invention. [Figure 21] FIG. 11 is a diagram showing various parameters for a DM-RS configuration type according to one embodiment of the present invention. [Figure 22] FIG. 11 is a flow diagram illustrating a set of one or more time indexes l defined relative to the start of PUSCH placement when modified precoding is not enabled according to one embodiment of the present invention. [Figure 23]A figure showing a calculation formula used to estimate the subcarrier k to which the PT-RS is mapped in one embodiment of this embodiment. [Figure 24] FIG. 13 is a diagram showing a correspondence relationship of kRE ref according to one aspect of this embodiment. [Diagram 25] A diagram showing PT-RS symbol mapping according to one embodiment of this embodiment. [Figure 26] FIG. 11 is a flow diagram illustrating a set of one or more time indexes l defined relative to the start of PUSCH placement when modified precoding is not enabled according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described.

[0014] FIG. 1 is a conceptual diagram of a wireless communication system according to an embodiment of the present invention. 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 may also be referred to as terminal devices 1. The base station device 3 may include some or all of a communication device, a node, a NB (NodeB), an eNB, a gNB, a network device (core network, gateway), and an access point. The terminal device 1 may also be referred to as a UE (User equipment). The eNB is a node that provides EUTRA user plane and control plane protocol termination for one or more terminal devices 1, and an eNB connected to a fifth generation core network (5GC) via a Next Generation (NG) interface is particularly referred to as an ng-eNB. The gNB is a node that provides NR user plane and control plane protocol termination for one or more terminal devices 1, and is connected to the 5GC via an NG interface.

[0015] The base station device 3 may configure one or both of an MCG (Master Cell Group) and an SCG (Secondary Cell Group). The MCG is a group of serving cells including at least a PCell (Primary Cell). The SCG is a group of serving cells including at least a PSCell (Primary Secondary Cell). The PCell may be a serving cell provided based on an 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. The PCell and the PSCell may be referred to as SpCells (Special Cells). Configuring one CG using one SpCell and one or more SCells and performing communication may be referred to as carrier aggregation.

[0016] The MCG may be configured with one or more serving cells on EUTRA. The SCG may be configured with one or more serving cells on NR. The MCG may be configured with one or more serving cells on NR. The SCG may be configured with one or more serving cells on EUTRA. The MCG and SCG may be configured with one or more serving cells of either EUTRA or NR. Here, "on EUTRA" may mean that EUTRA RAT (Radio Access Technology) is applied. "on NR" may mean that NR RAT is applied.

[0017] The MCG may be configured with one or more serving cells on EUTRA. The SCG may be configured with one or more serving cells on NR-U. The MCG may be configured with one or more serving cells on NR. The SCG may be configured with one or more serving cells on NR-U. The MCG may be configured with one or more serving cells of either EUTRA or NR or NR-U. The SCG may be configured with one or more serving cells of either EUTRA or NR or NR-U. NR-U is intended to provide NR communication / access / services in an unlicensed frequency band (operating band). In the frequency band in which NR-U communication is performed, communication may be performed by a terminal device and / or an access point (and / or a base station device) that performs a wireless local area network (Radio LAN) service (communication and / or method), a wireless access systems (WAS) service, an IEEE802.11 service, a WiFi service, a fixed wireless access (FWA) service, an intelligent transport systems (ITS) service, or a licensed assisted access (LAA) service. On the other hand, NR is intended to perform NR-type communication / access / service in a frequency band that requires a frequency license. LTE is intended to perform LTE-type communication / access / service in a frequency band that requires a frequency license. LAA is intended to perform LTE-type communication / access / service in a frequency band that does not require a frequency license.

[0018] The operating bands (carrier frequencies and frequency bandwidths) applicable to each of EUTRA, NR, and NR-U may be defined (specified) separately.

[0019] Also, the MCG may be configured by the first base station device. Also, the SCG may be configured by the second base station device. That is, the PCell may be configured by the first base station device. The PSCell may be configured by the second base station device. The first base station device and the second base station device may each be the same as the base station device 3.

[0020] The communication technology related to coverage enhancement in one aspect of this embodiment may be used to support a wide-area (long-distance) communication area (coverage), may be used to improve communication conditions between an outdoor base station device and an indoor terminal device, or may be used to improve communication conditions between an indoor base station device and an indoor terminal device.

[0021] The frame structure will now be described.

[0022] In a wireless communication system according to an aspect of the present embodiment, at least OFDM (Orthogonal Frequency Division Multiplex) is used. An OFDM symbol is a time domain unit of OFDM. An OFDM symbol includes at least one or a plurality of subcarriers. The OFDM symbol is converted into a time-continuous signal in baseband signal generation. In the downlink, at least CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplex) is used. In the uplink, either CP-OFDM or DFT-s-OFDM (Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplex) is used. DFT-s-OFDM may be provided by applying transform precoding to CP-OFDM.

[0023] The subcarrier spacing (SCS) is Δf=2 μ For example, the SCS setting μ may be set to any of 0, 1, 2, 3, 4, and / or 5. For a certain BWP (BandWidth Part), the SCS setting μ may be given by a higher layer parameter. That is, regardless of the downlink and / or uplink, the value of μ may be set for each BWP (for each downlink BWP, for each uplink BWP).

[0024] In the wireless communication system according to one aspect of the present embodiment, a time unit T is used to express a length in the time domain. c The time unit T is used. c is T c =1 / (Δf max N f ) may be given by Δf max may be a maximum value of the SCS supported in the wireless communication system according to one aspect of the present embodiment. max is Δf max = 480 kHz. f is N f = 4096. The constant κ can be expressed as κ = Δf max N f / (Δf ref N f,ref ) = 64. Δf ref may be 15 kHz. f,ref may be 2048.

[0025] The constant κ is the sum of the reference SCS and T c The constant κ may be used for the length of the subframe. The number of slots included in the subframe may be given based at least on the constant κ. ref is the reference SCS and N f,ref is the value corresponding to the reference SCS.

[0026] The transmission of a signal in the downlink and / or the transmission of a signal in the uplink is configured by a frame of 10 ms. The frame is configured to include 10 subframes. The length of the subframe is 1 ms. The length of the frame may be given regardless of Δf. That is, the setting of the frame may be given regardless of the value of μ. The length of the subframe may be given regardless of Δf. That is, the setting of the subframe may be given regardless of μ.

[0027] For a given SCS configuration μ, the number and index of slots included in one subframe may be given. For example, slot number n μ s ranges from 0 to N in the subframe. subframe,μ slot The number of slots included in one frame and the index may be given for each SCS setting μ. Also, the slot number n μ s,f is the number of frames from 0 to N frame,μ slot The numbers may be given in ascending order in the range -1. slot symb N OFDM symbols may be included in one slot. slot symb and / or may be provided based at least on some or all of a Cyclic Prefix (CP) configuration. The CP configuration may be provided based at least on a higher layer parameter. The CP configuration may be provided based at least on dedicated RRC signaling. The slot number may be referred to as a slot index.

[0028] FIG. 2 is a diagram showing a N slot symb 2A is an example showing the relationship between the SCS setting μ and the CP setting. In FIG. 2A, for example, when the SCS setting μ is 2 and the CP setting is normal CP (NCP), N slot symb =14, N frame,μ slot =40, N subframe,μslot In FIG. 2B, for example, when the SCS setting μ is 2 and the CP setting is the extended CP (ECP), N slot symb =12, N frame,μ slot =40, N subframe,μ slot =4.

[0029] The physical resources according to this embodiment will be described below.

[0030] An antenna port is defined by the fact that the channel on which a symbol is transmitted at one antenna port can be estimated from the channel on which another symbol is transmitted at the same antenna port. If the large scale properties of the channel on which a symbol is transmitted at one antenna port can be estimated from the channel on which a symbol is transmitted at another antenna port, the two antenna ports may be referred to as being Quasi Co-Located (QCL). The large scale properties may include at least long-range properties of the channel. The large scale properties may include at least some or all of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial Rx parameters. The first antenna port and the second antenna port may be QCL in terms of beam parameters when the receiving beam assumed by the receiving side for the first antenna port is the same as the receiving beam assumed by the receiving side for the second antenna port. The first antenna port and the second antenna port being QCLs in terms of beam parameters may mean that a transmission beam assumed by the receiving side for the first antenna port is the same as a transmission beam assumed by the receiving side for the second antenna port. The terminal device 1 may assume that the two antenna ports are QCLs if the large-scale characteristics of a channel through which symbols are transmitted at one antenna port can be estimated from the channel through which symbols are transmitted at another antenna port. The two antenna ports being QCLs may mean that the two antenna ports are assumed to be QCLs.

[0031] For the SCS setting μ and the set of carriers, N size,μ grid,x N RB sc subcarriers and N subframe,μ symbGiven a resource grid defined by N OFDM symbols. size,μ grid,x may denote the number of resource blocks provided for SCS configuration μ for carrier x. size,μ grid,x N may denote the bandwidth of the carrier. size,μ grid,x may be given by the higher layer parameter CarrierBandwidth contained in the SCS-SpecificCarrier information element. That is, N size,μ grid,x may be used to indicate the bandwidth (number of resource blocks) of a carrier. Carrier x may indicate either a downlink carrier or an uplink carrier. That is, x may be either "DL" or "UL". N RB sc may indicate the number of subcarriers contained in one resource block. RB sc may be 12. At least one resource grid may be provided for each antenna port p and / or for each SCS setting μ and / or for each setting of a transmission direction. The transmission direction includes at least a downlink (DL) and an uplink (UL). Hereinafter, a set of parameters including at least the antenna port p, the SCS setting μ, and a part or all of the setting of the transmission direction may also be referred to as a first radio parameter set. That is, one resource grid may be provided for each first radio parameter set. Note that the radio parameter set may be one or more sets including one or more radio parameters (physical layer parameters or higher layer parameters).

[0032] In the downlink, a carrier included in a serving cell is called a downlink carrier (or a downlink component carrier). In the uplink, a carrier included in a serving cell is called an uplink carrier (or an uplink component carrier). The downlink component carrier and the uplink component carrier may be collectively called a component carrier (or a carrier).

[0033] The type of the serving cell may be any of PCell, PSCell, and SCell. The PCell may be a serving cell identified based at least on a cell ID (physical layer cell ID, physical cell ID) obtained from an SSB (Synchronization signal / Physical broadcast channel block) in the initial connection. The SCell may be a serving cell used in carrier aggregation (a serving cell that can be added after the initial connection and / or RRC connection of the PCell is established). The SCell may be a serving cell provided based at least on dedicated RRC signaling. The SSB may be referred to as an SS / PBCH block.

[0034] Each element in the resource grid provided for each first radio parameter set may be referred to as a resource element (RE). A resource element is a frequency domain index k sc and the time domain index l sym For a given first radio parameter set, the resource elements are identified by frequency domain index k sc and the time domain index l sym The frequency domain index k is sc and the time domain index l sym The resource element identified by sc , l sym ) The frequency domain index k sc is from 0 to N μRB N RB sc It can have any value between -1 and N. μ RB may be the number of resource blocks provided for the SCS configuration μ. μ RB is N size,μ grid,x N RB sc is the number of subcarriers contained in the resource block, and N RB sc = 12. The frequency domain index k sc is the subcarrier index k sc The time domain index l sym is the OFDM symbol index l sym One or more resource elements may correspond to a physical resource and a complex value (complex-valued modulation symbol). One or more information bits (information bits for control information, transport blocks, and higher layer parameters) may be mapped to each of the one or more resource elements corresponding to the physical resource and / or complex value.

[0035] 3 is a schematic diagram showing an example of a resource grid in a subframe according to one embodiment of the present invention. In the resource grid of FIG. 3, the horizontal axis represents a time domain index l sym where the vertical axis is the frequency domain index k sc In one subframe, the frequency domain of the resource grid is N μ RB N RB sc In one subframe, the time domain of the resource grid is 14 2 μ A resource block may contain N OFDM symbols. RB scsubcarriers. The time domain of the resource block may correspond to one 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.

[0036] The terminal device 1 may be instructed to transmit and receive using only a subset of the resource grid. The subset of the resource grid may also be referred to as a BWP, and the BWP may be given based on at least a part or all of a parameter of a higher layer and / or a DCI. The BWP may also be referred to as a CBP (Carrier Bandwidth Part). The terminal device 1 may not be instructed to transmit and receive using all the sets of the resource grid. The terminal device 1 may be instructed to transmit and receive using some frequency resources in the resource grid. One BWP may be composed of multiple resource blocks in the frequency domain. One BWP may be composed of multiple consecutive resource blocks in the frequency domain. The BWP set for the downlink carrier may also be referred to as a downlink BWP. The BWP set for the uplink carrier may also be referred to as an uplink BWP. The BWP may be a subset of the band of the carrier (a subset of the frequency domain in the carrier).

[0037] One or more downlink BWPs may be configured for each serving cell. One or more uplink BWPs may be configured for each serving cell.

[0038] Of one or more downlink BWPs configured for a serving cell, one downlink BWP may be configured as an active downlink BWP. A downlink BWP switch is used to deactivate one active downlink BWP and activate inactive downlink BWPs other than the one active downlink BWP. The switching of the downlink BWP may be controlled by a BWP field included in the downlink control information. The switching of the downlink BWP may be controlled based on a parameter of a higher layer.

[0039] In an active downlink BWP, a DL-SCH may be received. In an active downlink BWP, a PDCCH may be monitored. In an active downlink BWP, a PDSCH may be received.

[0040] In an inactive downlink BWP, the DL-SCH is not received, the PDCCH is not monitored, and no CSI is reported for the inactive downlink BWP.

[0041] Of one or more downlink BWPs configured for a serving cell, two or more downlink BWPs may not be configured as active downlink BWPs.

[0042] Of one or more uplink BWPs configured for a serving cell, one uplink BWP may be configured as an active uplink BWP. An uplink BWP switch is used to deactivate one active uplink BWP and activate inactive uplink BWPs other than the one active uplink BWP. The switching of the uplink BWP may be controlled by a BWP field included in the downlink control information. The switching of the uplink BWP may be controlled based on a parameter of a higher layer.

[0043] In an active uplink BWP, a UL-SCH may be transmitted. In an active uplink BWP, a PUCCH may be transmitted. In an active uplink BWP, a PRACH may be transmitted. In an active uplink BWP, an SRS may be transmitted.

[0044] In an inactive uplink BWP, UL-SCH is not transmitted. In an inactive uplink BWP, PUCCH is not transmitted. In an inactive uplink BWP, PRACH is not transmitted. In an inactive uplink BWP, SRS is not transmitted.

[0045] Of one or more uplink BWPs configured for one serving cell, two or more uplink BWPs may not be configured as active uplink BWPs. That is, for the serving cell including the uplink BWP, there may be at least one active uplink BWP.

[0046] The higher layer parameters are parameters included in the higher layer signals. The higher layer signals may be RRC (Radio Resource Control) signaling or MAC CE (Medium Access Control Control Element). Here, the higher layer signals may be RRC layer signals or MAC layer signals. The higher layer parameters provided by the RRC layer signals may be notified from the base station device 3 to the terminal device 1 and may be set.

[0047] The higher layer signal may be a 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) At least includes ReconfigurationWithSync information element Feature C3) Mapped to PBCH

[0048] The ReconfigurationWithSync information element may include information indicating a commonly used configuration in the serving cell. The commonly used configuration in the serving cell may include at least a PRACH configuration. The PRACH configuration may at least indicate one or more random access preamble indices. The PRACH configuration may at least indicate a time / frequency resource of the PRACH.

[0049] The common RRC signaling may include at least common RRC parameters, which may be parameters commonly used in a serving cell (cell-specific).

[0050] The higher layer signaling may be dedicated RRC signaling. The dedicated RRC signaling may comprise at least some or all of the following features D1 to D2: Feature D1) Mapped to DCCH logical channel Feature D2) ReconfigurationWithSync information element not included

[0051] For example, a MIB (Master Information Block) and a SIB (System Information Block) may be included in the common RRC signaling. Also, a message of an upper layer that is mapped to a DCCH logical channel and includes at least a ReconfigurationWithSync information element may be included in the common RRC signaling. Also, a message of an upper layer that is mapped to a DCCH logical channel and does not include a ReconfigurationWithSync information element may be included in the dedicated RRC signaling. Note that the MIB and the SIB may be collectively referred to as system information.

[0052] In addition, the upper layer parameters including one or more upper layer parameters may be referred to as information elements (IEs). In addition, the upper layer parameters including one or more upper layer parameters and / or the upper layer parameters including one or more IEs and / or the IEs may be referred to as messages (upper layer messages, RRC messages), information blocks (IBs), or system information.

[0053] The SIB may at least indicate a time index of the SSB. The SIB may at least include information related to PRACH resources. The SIB may at least include information related to setting up an initial connection.

[0054] The ReconfigurationWithSync information element may include at least information related to PRACH resources. The ReconfigurationWithSync information element may include at least information related to setting up an initial connection.

[0055] The dedicated RRC signaling may include at least dedicated RRC parameters. The dedicated RRC parameters may be parameters that are used exclusively for the terminal device 1 (UE-specific). The dedicated RRC signaling may include at least common RRC parameters.

[0056] The common RRC parameters and the dedicated RRC parameters may also be referred to as higher layer parameters.

[0057] The following describes physical channels and physical signals according to various aspects of the present embodiment.

[0058] An uplink physical channel may correspond to a set of resource elements carrying information generated in a higher layer. An uplink physical channel is a physical channel used in an uplink carrier. In a 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)

[0059] The PUCCH may be used to transmit uplink control information (UCI). The uplink control information includes some or all of channel state information (CSI), scheduling requests (SR), and hybrid automatic repeat request ACKnowledgement (HARQ-ACK) information corresponding to transport blocks (TBs). Note that the TBs may also be referred to as MAC PDUs (Medium Access Control Protocol Data Units), DL-SCHs (Downlink-Shared Channels), or PDSCHs (Physical Downlink Shared Channels).

[0060] One or more types of uplink control information may be multiplexed in the PUCCH. The multiplexed PUCCH may be transmitted. That is, a plurality of HARQ-ACKs may be multiplexed in the PUCCH, a plurality of CSIs may be multiplexed, a plurality of SRs may be multiplexed, a HARQ-ACK and a CSI may be multiplexed, a HARQ-ACK and a SR may be multiplexed, or a different type of UCI may be multiplexed.

[0061] The HARQ-ACK information may include at least a HARQ-ACK bit corresponding to a TB. The HARQ-ACK bit may indicate an ACK (acknowledgement) or a NACK (negative-acknowledgement) corresponding to the TB. The ACK may be a value indicating that the decoding of the TB is successfully completed. The NACK may be a value indicating that the decoding of the TB is not successfully completed. The HARQ-ACK information may include at least one HARQ-ACK codebook including one or more HARQ-ACK bits. The HARQ-ACK bit corresponding to one or more TBs may be the HARQ-ACK bit corresponding to a PDSCH including the one or more TBs.

[0062] The HARQ-ACK bit may indicate an ACK or NACK corresponding to one Code Block Group (CBG) included in the TB. The HARQ-ACK may also be referred to as HARQ feedback, HARQ information, or HARQ control information.

[0063] The SR may be used at least to request PUSCH resources for initial transmission. The SR may also be used to request UL-SCH resources for new transmission. The SR bit may be used to indicate either a positive SR or a negative SR. The SR bit indicating a positive SR may also be referred to as "a positive SR is transmitted". The positive SR may indicate that a PUSCH resource for initial transmission is requested by the terminal device 1. The positive SR may indicate that an SR is triggered by a higher layer. The positive SR may be transmitted when an SR is instructed to be transmitted by a higher layer. The SR bit indicating a negative SR may also be referred to as "a negative SR is transmitted". The negative SR may indicate that a PUSCH resource for initial transmission is not requested by the terminal device 1. The negative SR may indicate that an SR is not triggered by a higher layer. The negative SR may be transmitted when an SR is not instructed to be transmitted by a higher layer.

[0064] The SR bit may be used to indicate either a positive SR or a negative SR for one or more SR configurations. Each of the one or more SR configurations may correspond to one or more logical channels. A positive SR for an SR configuration may be a positive SR for any or all of the one or more logical channels corresponding to the SR configuration. A negative SR may not correspond to a specific SR configuration. An indication of a negative SR may be an indication of a negative SR for all SR configurations.

[0065] The SR setting may be a Scheduling Request ID (SR-ID), which may be provided by a parameter of a higher layer.

[0066] The CSI may include at least some or all of a channel quality index (CQI), a precoder matrix index (PMI), and a rank index (RI). The CQI is an index related to the quality of the channel (e.g., propagation strength), the PMI is an index indicating the precoder, and the RI is an index indicating the transmission rank (or the number of transmission layers).

[0067] The CSI may be provided based at least on receiving a physical signal (e.g., CSI-RS) used at least for channel measurement. The CSI may include a value selected by the terminal device 1. The CSI may be selected by the terminal device 1 based at least on receiving a physical signal used at least for channel measurement. The channel measurement may include interference measurement. Note that the CSI-RS may be set based on a CSI-RS configuration or may be set based on an SSB configuration.

[0068] The CSI report is a report of CSI. The CSI report may include CSI part 1 and / or CSI part 2. CSI part 1 may be configured to include at least a wideband channel quality information (wideband CQI), a wideband precoder matrix index (wideband PMI), and a part or all of RI. The number of bits of CSI part 1 multiplexed into PUCCH may be a predetermined value regardless of the value of RI of the CSI report. The number of bits of CSI part 2 multiplexed into PUCCH may be given based on the value of RI of the CSI report. The rank index of the CSI report may be a value of a rank index used for calculation of the CSI report. The RI of the CSI information may be a value indicated by an RI field included in the CSI report.

[0069] The set of RIs allowed in a CSI report may be some or all of 1 to 8. The set of RIs allowed in a CSI report may also be given based at least on a higher layer parameter RankRestriction. If the set of RIs allowed in a CSI report includes only one value, the RI of the CSI report may be the one value.

[0070] A priority may be set for a CSI report. The priority of a CSI report may be given based on at least some or all of a configuration regarding a time domain behavior (processing) of the CSI report, a content type of the CSI report, an index of the CSI report, and / or an index of a serving cell for which measurement of the CSI report is configured.

[0071] The setting regarding the time domain behavior (processing) of the CSI reporting may be a setting indicating whether the CSI reporting is performed aperiodic, semi-persistent, or semi-static.

[0072] The content type of the CSI report may indicate whether the CSI report includes layer 1 Reference Signals Received Power (RSRP).

[0073] The index of the CSI report may be given by a higher layer parameter.

[0074] The PUCCH supports one or more PUCCH formats, from PUCCH format 0 to PUCCH format 4. The PUCCH format may be transmitted on the PUCCH. The transmission of the PUCCH format may also mean that the PUCCH is transmitted.

[0075] FIG. 4 shows a PUCCH format according to one embodiment of the present invention and a PUCCH format length N PUCCH symb FIG. 1 is a diagram showing an example of the relationship between the length N of PUCCH format 0 and PUCCH symb is 1 or 2 OFDM symbols. The length of PUCCH format 1, N PUCCH symb The length N of PUCCH format 2 is between 4 and 14 OFDM symbols. PUCCH symb is 1 or 2 OFDM symbols. The length N PUCCH symb The length N of PUCCH format 4 is between 4 and 14 OFDM symbols. PUCCH symb can be anywhere from 4 to 14 OFDM symbols.

[0076] The PUSCH is used at least to transmit a TB (MAC PDU, UL-SCH). The PUSCH may be used at least to transmit a TB, HARQ-ACK information, CSI, and a part or all of an SR. The PUSCH is used at least to transmit a random access message 3 (message 3 (Msg3)) corresponding to an RAR (Msg2) and / or an RAR grant in a random access procedure. The TB may correspond to each of the uplink and the downlink. That is, the PUSCH may be used to transmit a TB for the uplink. The PDSCH may be used to transmit a TB for the downlink.

[0077] The PRACH is used at least to transmit a random access preamble (random access message 1, message 1 (Msg1)). The PRACH may be used at least to indicate some or all of an initial connection establishment procedure, a handover procedure, a connection re-establishment procedure, an initial access procedure, synchronization (timing adjustment) for PUSCH transmission, and a resource request for PUSCH. The random access preamble may be used to notify the base station device 3 of an index (random access preamble index) provided by a higher layer of the terminal device 1.

[0078] The random access preamble may be provided by cyclically shifting a Zadoff-Chu sequence corresponding to a physical root sequence index u. The Zadoff-Chu sequence may be generated based on the physical root sequence index u. A plurality of random access preambles may be defined in one serving cell. The random access preamble may be identified based at least on an index of the random access preamble. Different random access preambles corresponding to different indices of the random access preamble may correspond to different combinations of the physical root sequence index u and the cyclic shift. The physical root sequence index u and the cyclic shift may be provided based at least on information included in the system information. The physical root sequence index u may be an index that identifies a sequence included in the random access preamble. The random access preamble may be identified based at least on the physical root sequence index u.

[0079] In FIG. 1, the following uplink physical signals are used in uplink wireless communication: The uplink physical signals may not be used to transmit information output from higher layers, but are used by the physical layer. ·UL DMRS(UpLink Demodulation Reference Signal) ·SRS(Sounding Reference Signal) ·UL PTRS(UpLink Phase Tracking Reference Signal)

[0080] The UL DMRS is related to the transmission of PUSCH and / or PUCCH. The UL DMRS is multiplexed with PUSCH or PUCCH. The base station device 3 may use the UL DMRS to perform propagation path correction of PUSCH or PUCCH. Hereinafter, transmitting a PUSCH and a UL DMRS related to the PUSCH together is simply referred to as transmitting a PUSCH. Hereinafter, transmitting a PUCCH and a UL DMRS related to the PUCCH together is simply referred to as transmitting a PUCCH. The UL DMRS related to the PUSCH is also referred to as a UL DMRS for PUSCH. The UL DMRS related to the PUCCH is also referred to as a UL DMRS for PUCCH.

[0081] The SRS may not be related to the transmission of the PUSCH or PUCCH. The base station device 3 may use the SRS for measuring the channel condition. The SRS may be transmitted in an uplink slot, a subframe, or a predetermined number of OFDM symbols from the end of the UpPTS.

[0082] The UL PTRS may be a reference signal used at least for phase tracking. The UL PTRS may be associated with a UL DMRS group including at least an antenna port used for one or more UL DMRSs. The association of the UL PTRS with the UL DMRS group may mean that the antenna port of the UL PTRS and some or all of the antenna ports included in the UL DMRS group are at least QCL. The UL DMRS group may be identified based at least on an antenna port with a smallest index in the UL DMRS included in the UL DMRS group. The UL PTRS may be mapped to an antenna port with a smallest index among one or more antenna ports to which one codeword is mapped. The UL PTRS may be mapped to a first layer when one codeword is mapped to at least a first layer and a second layer. The UL PTRS may not be mapped to the second layer. An index of an antenna port to which the UL PTRS is mapped may be provided based at least on downlink control information.

[0083] 1, the following downlink physical channels are used in downlink wireless communication from the base station device 3 to the terminal device 1. The downlink physical channels are used by the physical layer to transmit information output from a higher layer. ·PBCH(Physical Broadcast Channel) ·PDCCH (Physical Downlink Control Channel) ·PDSCH(Physical Downlink Shared Channel)

[0084] The PBCH is used at least for transmitting the MIB and / or the PBCH payload. The PBCH payload may include at least information indicating an index related to the transmission timing of the SSB (SSB occasion). The PBCH payload may include information related to an identifier (index) of the SSB. The PBCH may be transmitted based on a predetermined transmission interval. The PBCH may be transmitted at intervals of 80 milliseconds (ms). The PBCH may be transmitted at intervals of 160 ms. The contents of the information included in the PBCH may be updated every 80 ms. A part or all of the information included in the PBCH may be updated every 160 ms. The PBCH may be configured with 288 subcarriers. The PBCH may be configured to include 2, 3, or 4 OFDM symbols. The MIB may include information related to an identifier (index) of the SSB. The MIB may include information indicating at least a part of a slot number, a subframe number, and / or a radio frame number in which the PBCH is transmitted.

[0085] The PDCCH is at least used for transmitting downlink control information (DCI). The PDCCH may be transmitted including at least the DCI. The PDCCH may be transmitted including the DCI. The DCI may also be referred to as a DCI format. The DCI may indicate at least either a downlink grant or an uplink grant. The DCI format used for scheduling the PDSCH may also be referred to as a downlink DCI format and / or a downlink grant. The DCI format used for scheduling the PUSCH may also be referred to as an uplink DCI format and / or an uplink grant. The downlink grant may also be referred to as a downlink assignment or a downlink allocation. The uplink DCI format includes at least one or both of DCI format 0_0 and DCI format 0_1.

[0086] DCI format 0_0 may be configured to include at least some or all of 1A to 1J. 1A) Identifier for DCI formats field 1B) Frequency Domain Resource Allocation field (FDRA field) 1C) Time Domain Resource Allocation field (TDRA field) 1D) Frequency hopping flag field (FH field) 1E) MCS field (Modulation and Coding Scheme field) 1F) CSI request field (Channel State Information request field) 1G) NDI field (New Data Indicator field) 1H) RV field (Redundancy Version field) 1I) HPID field (HARQ process ID field, HARQ process number field) 1J) TPC (Transmission Power Control) command field for PUSCH (TPC command for scheduled PUSCH field)

[0087] 1A may be used at least to indicate which of one or more DCI formats the DCI format including 1A corresponds to, and the one or more DCI formats may be given based at least on some or all of DCI format 1_0, DCI format 1_1, DCI format 0_0, and / or DCI format 0_1.

[0088] 1B may be used at least to indicate an allocation of frequency resources for a PUSCH scheduled by a DCI format including 1B.

[0089] 1C may be used at least to indicate an allocation of time resources for a PUSCH scheduled by a DCI format including 1C.

[0090] 1D may be used at least to indicate whether frequency hopping is applied to a PUSCH scheduled by a DCI format including 1D.

[0091] 1E may be used at least to indicate a modulation scheme and / or a part or all of a target coding rate for a PUSCH scheduled by a DCI format including the 1E. The target coding rate may be a target coding rate for a TB of the PUSCH. The size of the TB (TBS) may be given based at least on the target coding rate.

[0092] 1F is at least used to indicate a CSI report. The size of 1F may be a predetermined value. The size of 1F may be 0, 1, 2, or 3. The size of 1F may be determined according to the number of CSI settings configured in the terminal device 1.

[0093] 1G is used to indicate whether the transmission of the PUSCH corresponding to 1I scheduled by the DCI format is a new transmission or a retransmission based on whether the value of 1G is toggled. If the value of 1G is toggled, the PUSCH corresponding to 1I is a new transmission, otherwise, the PUSCH corresponding to 1I is a retransmission. The 1G may be a DCI indicating whether the base station device 3 requests retransmission of the PUSCH corresponding to 1I.

[0094] 1H is used to indicate the start position of the bit sequence of the PUSCH scheduled by the DCI format.

[0095] 1I is used to indicate the number (HPID) of the HARQ process to which the PUSCH scheduled by the DCI format corresponds.

[0096] 1J is used to adjust the transmission power of the PUSCH scheduled by the DCI format.

[0097] DCI format 0_1 ​​is composed of at least some or all of 2A to 2K. 2A) DCI format specific fields 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) NDI Field 2I) RV Field 2J) HPID field 2K) TPC command field for PUSCH

[0098] The BWP field may be used to indicate the uplink BWP to which the PUSCH scheduled by DCI format 0_1 ​​is mapped.

[0099] The CSI request field is at least used to indicate a CSI report, and the size of the CSI request field may be based at least on a higher layer parameter ReportTriggerSize.

[0100] Fields with the same names as those 1A to 1J described above contain the same contents, so their explanations will be omitted.

[0101] The downlink DCI format includes at least one or both of DCI format 1_0 and DCI format 1_1.

[0102] DCI format 1_0 may be configured to include at least some or all of 3A to 3L. 3A) DCI format specific fields 3B) Frequency domain resource allocation field 3C) Time Domain Resource Allocation Field 3D) Frequency hopping flag field 3E) MCS Field 3F) CSI List Field 3G) PDSCH to HARQ feedback timing indicator field 3H) PUCCH resource indication field (PRI field) 3I) NDI Field 3J) RV Field 3K) HPID field 3L) TPC command for scheduled PUCCH field

[0103] 3B to 3E may be used for the PDSCH scheduled by this DCI format.

[0104] 3G may be a field indicating timing K1. When the index of a slot including the last OFDM symbol of the PDSCH is slot n, the index of a slot including a PUCCH or PUSCH including at least a HARQ-ACK corresponding to a TB included in the PDSCH may be n+K1. When the index of a slot including the last OFDM symbol of the PDSCH is slot n, the index of a slot including a first OFDM symbol of a PUCCH or a first OFDM symbol of a PUSCH including at least a HARQ-ACK corresponding to a TB included in the PDSCH may be n+K1.

[0105] 3H may be a field indicating the index of one or more PUCCH resources included in the PUCCH resource set.

[0106] 3I is used to indicate whether a transmission of a PDSCH corresponding to 3K scheduled by the DCI format is a new transmission or a retransmission based on whether the value of 3I is toggled. If the value of 3K is toggled, the PDSCH corresponding to 3K is a new transmission, otherwise, the PDSCH corresponding to 3K is a retransmission.

[0107] 3J may be used to indicate the start position of the bit sequence of the PDSCH scheduled by the DCI format.

[0108] 3K may be used to indicate the number of the HARQ process to which the PDSCH scheduled by the DCI format corresponds.

[0109] 3L may be used to adjust the transmission power of the PUCCH corresponding to the PDSCH scheduled by the DCI format.

[0110] DCI format 1_1 may be configured to include at least some or all of 4A to 4M. 4A) DCI format specific fields 4B) Frequency domain resource allocation field 4C) Time Domain Resource Allocation Field 4D) Frequency hopping flag field 4E) MCS Field 4F) CSI List Field 4G) Timing indication field from PDSCH to HARQ feedback 4H) PUCCH resource indication field 4I) BWP Field 4J) NDI Field 4K) RV Field 4L) HPID field 4M) TPC command field for PUCCH

[0111] 3A, 4A, like 1A and 2A, are used to identify the DCI format.

[0112] 4B to 4E may be used for the PDSCH scheduled by this DCI format.

[0113] DCI format 4I may be used to indicate the downlink BWP to which the PDSCH scheduled by DCI format 1_1 is mapped.

[0114] The fields with the same names as those in 3A to 3L described above contain the same contents, so the explanation will be omitted.

[0115] Each DCI format may include padding bits to fit a predefined bit size (payload size).

[0116] DCI format 2 may include parameters used for transmission power control of the PUSCH or the PUCCH.

[0117] In various aspects of the present embodiment, unless otherwise specified, the number of resource blocks (RB) indicates the number of resource blocks in the frequency domain. In addition, resource block indexes are assigned in ascending order from resource blocks mapped to the low frequency domain to resource blocks mapped to the high frequency domain. In addition, resource blocks are a general term for common resource blocks and physical resource blocks.

[0118] One physical channel may be mapped to one serving cell. One physical channel may be mapped to one CBP configured on one carrier included in one serving cell.

[0119] One or more control resource sets (CORESETS) are assigned to the terminal device 1. The terminal device 1 monitors the PDCCH in one or more CORESETS.

[0120] The CORESET may indicate a time-frequency region to which one or more PDCCHs may be mapped. The CORESET may be a region in which the terminal device 1 monitors the PDCCH. The CORESET may be configured of contiguous resources (localized resource(s), contiguous resource(s)). The CORESET may be configured of discontinuous resources (distributed resource(s), discontinuous resource(s)).

[0121] In the frequency domain, the unit of mapping of CORESET may be a resource block (RB). For example, in the frequency domain, the unit of mapping of CORESET may be 6 resource blocks. That is, mapping of CORESET in the frequency domain may be performed by 6RB×n (n is 1, 2,...). In the time domain, the unit of mapping of CORESET may be an OFDM symbol. For example, in the time domain, the unit of mapping of CORESET may be one OFDM symbol.

[0122] The frequency domain of the CORESET may be given based at least on higher layer signaling and / or DCI.

[0123] The time domain of the CORESET may be given based at least on higher layer signaling and / or DCI.

[0124] A certain CORESET may be a common CORESET. The common CORESET may be a CORESET commonly set for a plurality of terminal devices 1. The common CORESET may be given based on at least a part or all of the MIB, the SIB, the common RRC signaling, and the cell ID. For example, the time resource and / or the frequency resource of the CORESET set to monitor the PDCCH used for scheduling the SIB may be given based on at least the MIB.

[0125] A certain CORESET may be a dedicated CORESET. The dedicated CORESET may be a CORESET that is set to be used exclusively for the terminal device 1. The dedicated CORESET may be provided based at least on dedicated RRC signaling.

[0126] The set of PDCCH candidates monitored by the terminal device 1 may be defined in terms of a search space, that is, the set of PDCCH candidates monitored by the terminal device 1 may be given by a search space.

[0127] The search space may be configured to include one or more PDCCH candidates of one or more aggregation levels. The aggregation level of the PDCCH candidate may indicate the number of CCEs constituting the PDCCH.

[0128] The terminal device 1 may monitor at least one or more search space sets in a slot where DRX (Discontinuous reception) is not set. DRX may be provided based at least on a parameter of a higher layer. The terminal device 1 may monitor at least one or more search space sets in a slot where DRX is not set.

[0129] The search space set may be configured to include at least one or more search spaces, and the type of the search space set may be any of a type 0 PDCCH common search space, a type 0a PDCCH common search space, a type 1 PDCCH common search space, a type 2 PDCCH common search space, a type 3 PDCCH common search space, and / or a UE dedicated PDCCH search space.

[0130] The type 0 PDCCH common search space, the type 0a PDCCH common search space, the type 1 PDCCH common search space, the type 2 PDCCH common search space, and the type 3 PDCCH common search space may also be referred to as a Common Search Space (CSS). The UE specific PDCCH search space may also be referred to as a UE specific Search Space (USS).

[0131] Each of the search space sets may be associated with one control resource set. Each of the search space sets may be included in at least one control resource set. For each of the search space sets, an index of the control resource set associated with the search space set may be given.

[0132] The type-0 PDCCH common search space may be used at least for DCI formats with a CRC (Cyclic Redundancy Check) sequence scrambled by SI-RNTI (System Information-Radio Network Temporary Identifier). The configuration of the type-0 PDCCH common search space may be given based at least on 4 least significant bits (LSBs) of an upper layer parameter PDCCH-ConfigSIB1. The upper layer parameter PDCCH-ConfigSIB1 may be included in the MIB. The configuration of the type-0 PDCCH common search space may be given based at least on an upper layer parameter SearchSpaceZero. An interpretation of the bits of the upper layer parameter SearchSpaceZero may be similar to an interpretation of the 4 least significant bits (LSBs) of the upper layer parameter PDCCH-ConfigSIB1. The configuration of the type-0 PDCCH common search space may be given based at least on an upper layer parameter SearchSpaceSIB1. The upper layer parameter SearchSpaceSIB1 may be included in the upper layer parameter PDCCH-ConfigCommon. The PDCCH detected in the type 0 PDCCH common search space may be used at least for scheduling the PDSCH including SIB1 and transmitted. The SIB1 is a type of SIB. The SIB1 may include scheduling information of SIBs other than SIB1. The terminal device 1 may receive higher layer parameters PDCCH-ConfigCommon in EUTRA. The terminal device 1 may receive higher layer parameters PDCCH-ConfigCommon in MCG.

[0133] The Type 0a PDCCH common search space may be used at least for a DCI format with a Cyclic Redundancy Check (CRC) sequence scrambled by a System Information-Radio Network Temporary Identifier (SI-RNTI). The configuration of the Type 0a PDCCH common search space may be based at least on a higher layer parameter SearchSpaceOtherSystemInformation. The higher layer parameter SearchSpaceOtherSystemInformation may be included in SIB1. The higher layer parameter SearchSpaceOtherSystemInformation may be included in the higher layer parameter PDCCH-ConfigCommon. The PDCCH detected in the Type 0 PDCCH common search space may be used at least for scheduling a PDSCH transmitted including a SIB other than SIB1.

[0134] The type 1 PDCCH common search space may be used at least for a DCI format with a CRC sequence scrambled by a Random Access-Radio Network Temporary Identifier (RA-RNTI) and / or a CRC sequence scrambled by a Temporary Common-Radio Network Temporary Identifier (TC-RNTI). The RA-RNTI may be given based at least on a time / frequency resource of a random access preamble transmitted by the terminal device 1. The TC-RNTI may be given by a PDSCH (also referred to as a random access message 2, message 2 (Msg2), or random access response (RAR)) scheduled by a DCI format with a CRC sequence scrambled by the RA-RNTI. The type 1 PDCCH common search space may be given based at least on a higher layer parameter ra-SearchSpace. The higher layer parameter ra-SearchSpace may be included in the SIB1. The higher layer parameter ra-SearchSpace may be included in the higher layer parameter PDCCH-ConfigCommon.

[0135] The type 2 PDCCH common search space may be used for DCI formats with CRC sequences scrambled by a Paging-Radio Network Temporary Identifier (P-RNTI). The P-RNTI may be used at least for transmission of DCI formats including information indicating a change in a SIB. The type 2 PDCCH common search space may be given based at least on a higher layer parameter PagingSearchSpace. The higher layer parameter PagingSearchSpace may be included in SIB1. The higher layer parameter PagingSearchSpace may be included in the higher layer parameter PDCCH-ConfigCommon.

[0136] The Type-3 PDCCH common search space may be used for a DCI format with a CRC sequence scrambled by a Cell-Radio Network Temporary Identifier (C-RNTI). The C-RNTI may be given based at least on a PDSCH (which may also be referred to as a Random Access Message 4, Message 4 (Msg4), or contention resolution) scheduled by a DCI format with a CRC sequence scrambled by a TC-RNTI. The Type-3 PDCCH common search space may be the search space set given when the higher layer parameter SearchSpaceType is set to common.

[0137] The UE dedicated PDCCH search space may be used at least for DCI formats with CRC sequences scrambled by the C-RNTI.

[0138] When a C-RNTI is given to the terminal device 1, the Type 0 PDCCH common search space, the Type 0a PDCCH common search space, the Type 1 PDCCH common search space, and / or the Type 2 PDCCH common search space may be used at least for a DCI format with a CRC sequence scrambled with the C-RNTI.

[0139] When a C-RNTI is given to the terminal device 1, a search space set given based at least on any of the upper layer parameter PDCCH-ConfigSIB1, the upper layer parameter SearchSpaceZero, the upper layer parameter SearchSpaceSIB1, the upper layer parameter SearchSpaceOtherSystemInformation, the upper layer parameter ra-SearchSpace, or the upper layer parameter PagingSearchSpace may be used at least for a DCI format with a CRC sequence scrambled with the C-RNTI.

[0140] The common CORESET may include at least one or both of a CSS and a USS. The dedicated CORESET may include at least one or both of a CSS and a USS.

[0141] The physical resource of the search space is composed of one or more control channel elements (CCEs). A CCE is composed of six resource element groups (REGs). A REG may be composed of one OFDM symbol of one physical resource block (PRB). That is, a REG may be composed of 12 resource elements (REs). A PRB may also be simply referred to as a resource block (RB).

[0142] The PDSCH is used at least to transmit the TB. The PDSCH may also be used at least to transmit a random access message 2 (RAR, Msg2). The PDSCH may also be used at least to transmit system information including parameters used for initial access.

[0143] In FIG. 1, the following downlink physical signals are used in downlink wireless communication: The downlink physical signals may not be used to transmit information output from higher layers, but are used by the physical layer. ·Synchronization signal ·DL DMRS(DownLink DeModulation Reference Signal) ·CSI-RS(Channel State Information-Reference Signal) ·DL PTRS(DownLink Phase Tracking Reference Signal) ·TRS(Tracking Reference Signal)

[0144] The synchronization signal is used for synchronization of the frequency domain and / or the time domain of the downlink by the terminal device 1. The synchronization signal includes a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

[0145] An SSB (SS / PBCH block) is configured to include at least a PSS, SSS, and some or all of the PBCH. The antenna ports of the PSS, SSS, and some or all of the PBCH included in the SS block may be the same. The PSS, SSS, and some or all of the PBCH included in the SSB may be mapped to consecutive OFDM symbols. The CP settings of the PSS, SSS, and some or all of the PBCH included in the SSB may be the same. The same value of SCS setting μ may be applied to the PSS, SSS, and some or all of the PBCH included in the SSB.

[0146] The DL DMRS is related to the transmission of the PBCH, the PDCCH, and / or the PDSCH. The DL DMRS is multiplexed into the PBCH, the PDCCH, and / or the PDSCH. The terminal device 1 may use the DL DMRS corresponding to the PBCH, the PDCCH, or the PDSCH in order to perform propagation path correction of the PBCH, the PDCCH, or the PDSCH. Hereinafter, the transmission of the PBCH and the DL DMRS associated with the PBCH together may be referred to as the transmission of the PBCH. Furthermore, the transmission of the PDCCH and the DL DMRS associated with the PDCCH together may be simply referred to as the transmission of the PDCCH. Furthermore, the transmission of the PDSCH and the DL DMRS associated with the PDSCH together may be simply referred to as the transmission of the PDSCH. The DL DMRS associated with the PBCH may also be referred to as the DL DMRS for the PBCH. The DL DMRS associated with the PDSCH may also be referred to as the DL DMRS for the PDSCH. The DL DMRS associated with the PDCCH may also be referred to as the DL DMRS associated with the PDCCH.

[0147] The DL DMRS may be a reference signal that is individually configured for the terminal device 1. The sequence of the DL DMRS may be provided based at least on a parameter that is individually configured for the terminal device 1. The sequence of the DL DMRS may be provided based at least on a UE-specific value (e.g., C-RNTI, etc.). The DL DMRS may be transmitted separately for the PDCCH and / or the PDSCH.

[0148] The CSI-RS may be a signal used at least to calculate the CSI. The CSI-RS may also be used to measure Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ). The pattern of the CSI-RS assumed by the terminal device 1 may be given by at least a parameter of a higher layer.

[0149] The DL PTRS may be a signal that is at least used for phase noise compensation. The pattern of DL PTRS assumed by the terminal device 1 may be given based on at least higher layer parameters and / or DCI.

[0150] The DL PTRS may be associated with a DL DMRS group that includes at least an antenna port used for one or more DL DMRSs. The association of the DL PTRS with the DL DMRS group may be such that the antenna port of the DL PTRS and some or all of the antenna ports included in the DL DMRS group are at least QCL. The DL DMRS group may be identified based at least on the antenna port with the smallest index among the DL DMRSs included in the DL DMRS group.

[0151] The TRS may be a signal used at least for time and / or frequency synchronization. The pattern of TRS assumed by the terminal device may be given at least based on higher layer parameters and / or DCI.

[0152] The downlink physical channel and the downlink physical signal may also be referred to as a downlink signal. The uplink physical channel and the uplink physical signal may also be referred to as an uplink signal. The downlink signal and the uplink signal may also be referred to as a physical signal or a signal. The downlink physical channel and the uplink physical channel may also be referred to as a physical channel. In the downlink, the physical signal may include some or all of SSB, PDCCH (CORESET), PDSCH, DL DMRS, CSI-RS, DL PTRS, and TRS. In the uplink, the physical signal may include some or all of PRACH, PUCCH, PUSCH, UL DMRS, UL PTRS, and SRS. The physical signal may be a signal other than the above-mentioned signals. That is, the physical signal may include one or more types of physical channels and / or physical signals, or may include one or more physical channels and / or physical signals.

[0153] The BCH (Broadcast CHannel), UL-SCH (Uplink-Shared CHannel), and DL-SCH (Downlink-Shared CHannel) are transport channels. A channel used in the Medium Access Control (MAC) layer may be called a transport channel. The unit of the transport channel used in the MAC layer may be called a TB or MAC PDU. In the MAC layer, HARQ control is performed for each TB. A TB is a unit of data that the MAC layer delivers to the physical layer. In the physical layer, a TB is mapped to a codeword, and modulation processing is performed for each codeword.

[0154] The base station device 3 and the terminal device 1 exchange (transmit and receive) higher layer signals in a higher layer. For example, the base station device 3 and the terminal device 1 may transmit and receive RRC signaling (RRC messages, RRC information, RRC parameters, RRC information elements) in a radio resource control (RRC) layer. The base station device 3 and the terminal device 1 may also transmit and receive MAC CE (Control Element) in a MAC layer. Here, the RRC signaling and / or MAC CE are also referred to as higher layer signaling.

[0155] The PUSCH and the PDSCH may be used at least for transmitting RRC signaling and / or MAC CE. Here, the RRC signaling transmitted by the base station device 3 on the PDSCH may be common signaling for a plurality of terminal devices 1 in the serving cell. The signaling common to a plurality of terminal devices 1 in the serving cell may also be referred to as common RRC signaling. The RRC signaling transmitted by the base station device 3 on the PDSCH may be signaling dedicated to a certain terminal device 1 (which may also be referred to as dedicated signaling or UE specific signaling). The signaling dedicated to the terminal device 1 may also be referred to as dedicated RRC signaling. The parameters of the upper layer specific to the serving cell may be transmitted using the signaling common to a plurality of terminal devices 1 in the serving cell or the signaling dedicated to a certain terminal device 1. The parameters of the upper layer specific to the UE may be transmitted using the signaling dedicated to a certain terminal device 1.

[0156] The BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel), and DCCH (Dedicated Control CHannel) are logical channels. For example, the BCCH is an upper layer channel used for transmitting an MIB. Also, the CCCH (Common Control CHannel) is an upper layer channel used for transmitting information common to a plurality of terminal devices 1. Here, the CCCH may be used, for example, for a terminal device 1 that is not RRC-connected. Also, the DCCH (Dedicated Control CHannel) is an upper layer channel that is used at least for transmitting dedicated control information to the terminal device 1. Here, the DCCH may be used, for example, for a terminal device 1 that is RRC-connected.

[0157] The BCCH in the logical channel may be mapped to the BCH, DL-SCH, or UL-SCH in the transport channel. The CCCH in the logical channel may be mapped to the DL-SCH or UL-SCH in the transport channel. The DCCH in the logical channel may be mapped to the DL-SCH or UL-SCH in the transport channel.

[0158] The UL-SCH in the transport channel may be mapped to the PUSCH in the physical channel, the DL-SCH in the transport channel may be mapped to the PDSCH in the physical channel, and the BCH in the transport channel may be mapped to the PBCH in the physical channel.

[0159] An example of the configuration of the terminal device 1 according to one aspect of this embodiment will be described below.

[0160] 5 is a schematic block diagram showing a configuration of a terminal device 1 according to an embodiment of the present invention. As shown in the figure, the terminal device 1 includes a radio transmission / reception unit 10 and an upper layer processing unit 14. The radio transmission / reception unit 10 includes at least an antenna unit 11, an RF (Radio Frequency) unit 12, and a part or all of a baseband unit 13. The upper layer processing unit 14 includes at least a medium access control layer processing unit 15, and a part or all of a radio resource control layer processing unit 16. The radio transmission / reception unit 10 may also be referred to as a transmission unit, a reception unit, a physical layer processing unit, and / or a lower layer processing unit.

[0161] The upper layer processing unit 14 outputs uplink data (TB, UL-SCH) generated by a user operation or the like to the wireless transceiver unit 10. The upper layer processing unit 14 performs processing of the MAC layer, the Packet Data Integration Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the RRC layer.

[0162] The medium access control layer processing unit 15 included in the upper layer processing unit 14 performs processing of the MAC layer.

[0163] The radio resource control layer processing unit 16 included in the higher layer processing unit 14 performs processing of the RRC layer. The radio 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 a higher layer signal received from the base station device 3. That is, the radio resource control layer processing unit 16 sets various setting information / parameters based on information indicating the various setting information / parameters received from the base station device 3. The parameters may be higher layer parameters and / or information elements.

[0164] The wireless transceiver 10 performs physical layer processing such as modulation, demodulation, encoding, and decoding. The wireless transceiver 10 separates, demodulates, and decodes the received physical signal, and outputs the decoded information to the upper layer processing unit 14. These processes may be referred to as reception processing. The wireless transceiver 10 generates a physical signal (uplink signal) by modulating and encoding data, and generating a baseband signal (converting it into a time-continuous signal), and transmits the physical signal to the base station device 3. These processes may be referred to as transmission processing.

[0165] The RF unit 12 converts (down-converts) the signal received via the antenna unit 11 into a baseband signal by quadrature demodulation and removes unnecessary frequency components. The RF unit 12 outputs the processed analog signal to the baseband unit.

[0166] The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 removes a portion corresponding to the CP from the converted digital signal, performs a fast Fourier transform (FFT) on the signal from which the CP has been removed, and extracts a signal in the frequency domain.

[0167] The baseband unit 13 performs an inverse fast Fourier transform (IFFT) on the data to generate an OFDM symbol, adds a CP to the generated OFDM symbol, generates a baseband digital signal, and converts the baseband digital signal into an analog signal. The baseband unit 13 outputs the converted analog signal to the RF unit 12.

[0168] The RF unit 12 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 13, up-converts the analog signal to a carrier frequency, and transmits the signal via the antenna unit 11. The RF unit 12 also amplifies power. The RF unit 12 may also have a function of controlling transmission power. The RF unit 12 is also referred to as a transmission power control unit.

[0169] An example of the configuration of the base station device 3 according to one aspect of this embodiment will be described below.

[0170] 6 is a schematic block diagram showing a configuration of a base station device 3 according to an aspect of the present embodiment. As shown in the figure, the base station device 3 includes a radio 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 radio transmission / reception unit 30 is also referred to as a transmitting unit, a receiving unit, or a physical layer processing unit.

[0171] The upper layer processing unit 34 performs processing for the MAC layer, the PDCP layer, the RLC layer, and the RRC layer.

[0172] The medium access control layer processing unit 35 included in the upper layer processing unit 34 performs processing of the MAC layer.

[0173] The radio resource control layer processing unit 36 ​​included in the upper layer processing unit 34 performs processing of the RRC layer. The radio resource control layer processing unit 36 ​​generates downlink data (TB, DL-SCH) arranged in the PDSCH, system information, an RRC message, MAC CE, etc., or acquires them from an upper node, and outputs them to the radio transmitting / receiving unit 30. The radio resource control layer processing unit 36 ​​also manages various setting information / parameters of each terminal device 1. The radio 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 / reports information indicating various setting information / parameters.

[0174] The basic functions of the wireless transceiver unit 30 are similar to those of the wireless transceiver unit 10, and therefore a description thereof will be omitted. The wireless transceiver unit 30 transmits a physical signal generated in the wireless transceiver unit 30 to the terminal device 1 (i.e., performs a transmission process). The wireless transceiver unit 30 also performs a reception process on the received physical signal.

[0175] The medium access control layer processing units 15 and / or 35 may be referred to as MAC entities.

[0176] Each of the units labeled with reference numerals 10 to 16 in the terminal device 1 may be configured as a circuit. Each of the units labeled with reference numerals 30 to 36 in the base station device 3 may be configured as a circuit. Some or all of the units labeled with reference numerals 10 to 16 in the terminal device 1 may be configured as a memory and a processor connected to the memory. Some or all of the units labeled with reference numerals 30 to 36 in the base station device 3 may be configured as a memory and a processor connected to the memory. Various aspects (operations, processes) according to this embodiment may be realized (performed) in a memory included in the terminal device 1 and / or the base station device 3 and a processor connected to the memory.

[0177] Next, the DL PT-RS according to this embodiment will be described.

[0178] Here, the PT-RS transmitted by the terminal device 1 may be referred to as UL PT-RS, and the PT-RS received by the terminal device 1 may be referred to as DL PT-RS. Note that, when sidelink transmission and reception is possible in the terminal device 1, the transmission and reception of SL PT-RS may be possible. If the PT-RS is included in a PUSCH transmission, it may be referred to as a PT-RS for the PUSCH. If the PT-RS is included in a PDSCH transmission, it may be referred to as a PT-RS for the PDSCH.

[0179] The PT-RS reception procedure in the terminal device 1 according to this embodiment will be described.

[0180] Given an MCS table with the maximum modulation order that it reports it supports, the terminal device 1 may report a desired MCS and bandwidth threshold for each SCS applied to a data channel (PDSCH, PDCCH, PBCH, PCH, MIB, SIB) at a particular carrier frequency based on the UE capability of the terminal device 1 at that particular carrier frequency.

[0181] If the upper layer parameter phaseTrackingRS in the DMRS-DownlinkConfig is set in the terminal device 1, the upper layer parameters timeDensity and frequencyDensity in the PTRS-DownlinkConfig are set to their respective thresholds, ptrs-MCSi (i=1, 2, 3), and N RBi (i=0,1). Here, the higher layer parameter phaseTrackingRS in DMRS-DownlinkConfig may be given by setting up and / or releasing PTRS-DownlinkConfig. If one or both of the higher layer parameters timeDensity and / or frequencyDensity in PTRS-DownlinkConfig are set and RNTI is the same value as MCS-C-RNTI, C-RNTI, or CS-RNTI, the terminal device 1 assumes the function (role) of the scheduled MCS and scheduled bandwidth of the corresponding codeword in the corresponding BWP where the presence and pattern of the PT-RS antenna port is shown in FIG. 7. If the higher layer parameter timeDensity is not set, the terminal device 1 assumes the function (role) of the scheduled MCS and scheduled bandwidth of the corresponding codeword in the corresponding BWP shown in FIG. PT-RS = 1. Also, if the higher layer parameter frequencyDensity is not set, the terminal device 1 may assume that K PT-RS = 2. If both the higher layer parameters timeDensity and frequencyDensity in the PTRS-DownlinkConfig are set and the RNTI is the same value as the MCS-C-RNTI, C-RNTI, or CS-RNTI, the terminal device 1 PT-RS = 1 and K PT-RSThe terminal device 1 may assume that a PT-RS with MCS index=2 exists. If the scheduled MCS index in FIG. 8 is smaller than 10, or the scheduled MCS index in FIG. 9 is smaller than 5, or the scheduled MCS index in FIG. 10 is smaller than 15, or the number of scheduled RBs (bandwidth) is smaller than 3RBs, the terminal device 1 may assume that a PT-RS (DL PT-RS) does not exist. Otherwise, if the RNTI has the same value as the RA-RNTI, SI-RNTI, or P-RNTI, the terminal device 1 may assume that a PT-RS does not exist. Here, the values ​​of the MCS indexes in FIG. 8, FIG. 9, and FIG. 10 may be given by the DCI format used to schedule the PDSCH, or may be given based on higher layer parameters. That is, the base station device 3 does not need to transmit the PT-RS together with the PDSCH if these conditions are met.

[0182] FIG. 7 shows the thresholds ptrs-MCSi and N given by timeDensity and frequencyDensity according to one embodiment of the present invention. RBi and scheduled MCS(I MCS ) and bandwidth (N RB ) based on the PT-RS mapping pattern.

[0183] Fig. 7(a) shows the relationship between the threshold ptrs-MCSi given by timeDensity and the scheduled MCS (I MCS ) based on the time domain mapping pattern (L PT-RS ) is a table showing

[0184] Figure 7(b) shows the threshold N given by frequencyDensity. RBi and scheduled bandwidth (N RB ) based on the frequency domain mapping pattern (K PT-RS ) is a table showing

[0185] FIG. 8 is a diagram showing an MCS index table 1 (an example of an MCS index table) according to one aspect of this embodiment.

[0186] FIG. 9 is a diagram showing an MCS index table 2 (another example 1 of the MCS index table) according to one aspect of the present embodiment.

[0187] FIG. 10 is a diagram showing an MCS index table 3 (another example 2 of the MCS index table) according to one aspect of this embodiment.

[0188] Each MCS index table has an MCS index I MCS The MCS index is used to indicate the relationship between the modulation order, the target code rate, and the spectral efficiency. The MCS index may be indicated via the DCI or by higher layer parameters.

[0189] If the upper layer parameter phaseTrackingRS in DMRS-DownlinkConfig is not set, the terminal device 1 may assume that a PT-RS does not exist.

[0190] The upper layer parameter timeDensity in PTRS-DownlinkConfig is i (i=1,2,3). i(i=1,2,3), that is, ptrs-MCS1, ptrs-MCS2, and ptrs-MCS3 may be set with MCS indexes 0 to 29 in FIG. 8 or FIG. 10 when FIG. 8 or FIG. 10 is used, and with MCS indexes 0 to 28 in FIG. 9 when FIG. 9 is used. ptrs-MCS4 is not explicitly set by the higher layer, but may be assumed to be 29 when FIG. 8 or FIG. 10 is used, and 28 when FIG. 9 is used. The values ​​of ptrs-MCS1, ptrs-MCS2, and ptrs-MCS3 may be given so as to satisfy 0≦ptrs-MCS1≦ptrs-MCS2≦ptrs-MCS3≦29 or 28, respectively.

[0191] The higher layer parameter frequencyDensity in PTRS-DownlinkConfig is N RBi (i=0,1). N RBi (i=0,1), that is, N RB0 , N RB1 may be set with a value between 1 and 276. RB0 , N RB1 The values ​​of are 1≦N RB0 ≦N RB1 ≦276.

[0192] The upper layer parameter timeDensity in PTRS-DownlinkConfig is the time density threshold ptrs-MCS i =ptrs-MCS i+1 If we denote by L, the time density L of the relevant table rows for which both thresholds exist in Fig. 7(a), PT-RS may be considered invalid. For example, if ptrs-MCS1 = ptrs-MCS2, then the second line in Figure 7(a) (ptrs-MCS1 = < I MCS < ptrs-MCS2 line) MAY be considered not valid.

[0193] The upper layer parameter frequencyDensity in PTRS-DownlinkConfig is set to the frequency density threshold N RBi =N RBi+1 If we denote by K PT-RS MAY be considered invalid. For example, N RB0 =N RB1 If so, the second row of Figure 7(b) (N RB0 =< N RB < N RB1 lines) may be considered not valid.

[0194] In Fig. 7, the PT-RS time density (L PT-RS ) and PT-RS frequency density (K PT-RS ) is set as "PT-RS does not exist", the terminal device 1 may assume that the PT-RS does not exist.

[0195] When the terminal device 1 receives a PDSCH with an allocation period of 2 symbols or less, and PT-RS If L is set to 2 or 4, the terminal device 1 may assume that the PT-RS is not transmitted. Also, when the terminal device 1 receives a PDSCH with an allocation period of 4 symbols or less, and L PT-RS If is set to 4, terminal device 1 may assume that PT-RS is not transmitted.

[0196] When the terminal device 1 is scheduled to transmit a PDSCH for retransmission, the terminal device 1 MCS >V, the MCS for PT-RS time density determination may be derived from the DCI for the same transport block of the initial transmission, where V may be MCS index 28 in Figures 8 and 10 and MCS index 27 in Figure 9. The MCS derived from the DCI for the same transport block of the initial transmission may be less than or equal to V.

[0197] One or more DL DM-RS ports associated with one PT-RS port may be assumed to be quasi co-location (QCL) associated with {'QCL-TypeA' and 'QCL-TypeD'}. If the terminal device 1 is scheduled with one codeword, the PT-RS antenna port may be associated with the DM-RS antenna port with the lowest index among the multiple DM-RS antenna ports assigned for the PDSCH.

[0198] If the terminal device 1 is scheduled with two codewords, the PT-RS antenna port may be associated with the DM-RS antenna port with the lowest index among the DM-RS antenna ports assigned to the codeword with the highest MCS (MCS index). If the MCS indexes of the two codewords are the same value, the PT-RS antenna port may be associated with the DM-RS antenna port with the lowest index assigned to codeword 0.

[0199] Next, sequence generation for physical resources of a PT-RS for a PDSCH according to this embodiment and mapping to physical resources will be described.

[0200] The sequence of PT-RS for subcarrier k is r k = r(2m+k′), where r(2m+k′) is the sequence of DM-RS given at position l0 and subcarrier k.

[0201] The terminal device 1 may assume that the PT-RS is only present in one or more resource blocks used for the PDSCH.

[0202] If a PT-RS is present, the terminal device 1 determines whether the PT-RS should adjust the transmission power by a factor β PT-RS,i Scaled by α (p,μ) k,l =βPT-RS,i r k The resource element (k,l) corresponding to p,μ where l is within one or more OFDM symbols allocated for PDSCH transmission. p,μ may not be used for DM-RS, non-zero power CSI-RS, zero power CSI-RS, SS / PBCH blocks, detected PDCCH, or physical resources declared as 'not available'.

[0203] FIG. 11 is a flow diagram showing a set of one or more time indexes l defined in relation to the start of PDSCH configuration according to one embodiment of the present invention. In step 1101, the terminal device 1 sets i=0 and l ref = 0. In step 1102, the interval max(l ref +(i-1)L PT-RS +1,l ref ),...,l ref +iL PT-RS If any symbol in overlaps with the symbol used for DM-RS, the terminal device 1 sets i=1 and ref Set l to the symbol index of the DM-RS symbol in case of single-symbol DM-RS, and set l to the symbol index of the second DM-RS symbol in case of double-symbol DM-RS, ref +iL PT-RS Step 1102 is repeated as long as l is within the PDSCH arrangement. In step 1103, the terminal device 1 ref +iL PT-RS In step 1104, the terminal device 1 increments i by 1. In step 1105, the terminal device 1 adds l ref +iL PT-RS Step 1102 is repeated until L exceeds the PDSCH allocation. PT-RS ∈{1,2,4}.

[0204] The PT-RS is mapped to an OFDM symbol subsequent to the OFDM symbol to which the reference DM-RS is mapped.

[0205] For the purpose of PT-RS mapping, one or more resource blocks allocated for PDSCH transmission are numbered from 0 to N. RB The subcarriers corresponding to a set of one or more resource blocks are numbered from 0 to N, starting from the lowest frequency, to the highest, starting from the lowest frequency. RB SC N RB The subcarriers to which the terminal device 1 assumes that the PT-RS is mapped may be given by FIG.

[0206] FIG. 12 is a diagram illustrating an example of a calculation formula used to estimate a subcarrier k to which a PT-RS according to an aspect of the present embodiment is mapped. i is 0, 1, 2,.... k RE ref may be given by FIG. 13, which shows the offset (frequency offset) corresponding to the DM-RS port associated with the PT-RS port. If the higher layer parameter resourceElementOffset in the PTRS-DownlinkConfig is not set, one or more values ​​shown in the column corresponding to offset00 may be used. RNTI is the RNTI associated with the DCI that schedules the transmission. RB is the number of scheduled resource blocks. PT-RS may be given by the procedure associated with FIG. RE ref may correspond to the frequency offset of the RE level within one RB. PT-RS and k RB ref may correspond to a frequency offset at the RB level.

[0207] FIG. 13 shows a k REref FIG. RE ref may be determined based on the value of the DM-RS antenna port p, the DM-RS Configuration type, and the resourceElementOffset.

[0208] If the bandwidth scheduled for the PDSCH is smaller than a predetermined bandwidth, the terminal device 1 may assume that the PT-RS does not exist in the PDSCH. Here, if coverage enhancement is indicated for the downlink based on higher layer parameters or DCI, the terminal device 1 may perform reception processing assuming that the PT-RS exists in the PDSCH even if the PDSCH is scheduled with a bandwidth smaller than the predetermined bandwidth. In other words, when it is possible to perform coverage enhancement for the downlink and when the base station device 3 schedules the PDSCH with a bandwidth smaller than the predetermined bandwidth, the frequency density K PT-RS may be set to a predetermined value and the PT-RS may be transmitted together with the PDSCH.

[0209] When the scheduled bandwidth is smaller than 1 PRB and there are multiple DM-RS antenna ports, some of the resourceElementOffsets shown in FIG. 13 may not be selected. For example, when the scheduled bandwidth is 10 subcarriers, offset11 may not be selected for DM-RS Configuration type1, and offset10 and offset11 may not be selected for DM-RS Configuration type2. In other words, the selectable offsets may be limited according to the number of subcarriers in the scheduled bandwidth. Alternatively, the terminal device 1 may select k corresponding to each antenna port and offset. RE ref The value is modulated with the total number of DM-RS antenna ports, and the obtained value is multiplied by k RE refIt may also be used as.

[0210] When the base station device 3 schedules PDSCH transmission with a bandwidth smaller than 1PRB and transmits PT-RS together with the PDSCH, it is not necessary to set the higher layer parameter frequencyDensity in PTRS-DownlinkConfig for the terminal device 1. Based on the setting, the terminal device 1 can perform reception processing by always assuming that PT-RS exists together with the PDSCH.

[0211] Note that the terminal device 1 does not need to expect that the total number of used DM-RS antenna ports is greater than the number of subcarriers in the scheduled bandwidth. In other words, multiple DM-RS antenna ports are connected to one k RE ref The base station device 3 does not need to schedule a PDSCH such that the total number of used DM-RS antenna ports is greater than the number of subcarriers in the scheduled bandwidth.

[0212] Next, the UL PT-RS according to this embodiment will be described.

[0213] If the higher layer parameter phaseTrackingRS included in DMRS-UplinkConfig is not set, the terminal device 1 does not need to transmit the PT-RS (UL PT-RS).

[0214] The UL PT-RS may only exist (be mapped) in a PUSCH scheduled by a PDCCH with a CRC scrambled by MCS-C-RNTI, C-RNTI, CS-RNTI, SP-CSI-RNTI, or a PUSCH corresponding to a CUL (Configured UL, configured grant).

[0215] Next, a PT-RS transmission procedure in the terminal device 1 when modified precoding according to one aspect of this embodiment is not enabled will be described.

[0216] When modified precoding is not enabled and the upper layer parameter phaseTrackingRS in the DMRS-UplinkConfig is set in the terminal device 1, the upper layer parameters timeDensity and frequencyDensity in the PTRS-UplinkConfig are set to their respective thresholds, ptrs-MCSi (i = 1, 2, 3), and N RBi (i=0,1). Here, the higher layer parameter phaseTrackingRS in DMRS-UplinkConfig may be given by setting up and / or releasing PTRS-UplinkConfig. If either or both of the higher layer parameters timeDensity and / or frequencyDensity in PTRS-UplinkConfig are set, the terminal device 1 assumes the function (role) of the corresponding scheduled MCS and scheduled bandwidth in the corresponding BWP where the presence and pattern of the PT-RS antenna port is shown in FIG. 7. If the higher layer parameter timeDensity is not set, the terminal device 1 assumes the function (role) of the corresponding scheduled MCS and scheduled bandwidth in the corresponding BWP shown in FIG. PT-RS = 1. Also, if the higher layer parameter frequencyDensity is not set, the terminal device 1 may assume that K PT-RS = 2. If neither the higher layer parameters timeDensity nor frequencyDensity in PTRS-UplinkConfig are set, the terminal device 1 PT-RS = 1 and K PT-RS = 2.

[0217] The upper layer parameter PTRS-UplinkConfig is i (i=1,2,3). i(i=1,2,3), i.e., ptrs-MCS1, ptrs-MCS2, and ptrs-MCS3 may be configured with MCS indexes 0 to 29 in Figure 8 when Figure 8 is used, and with MCS indexes 0 to 28 in Figure 9 when Figure 9 is used. ptrs-MCS4 is not explicitly configured by higher layers, but may be assumed to be 29 when Figure 8 is used, and 28 when Figure 9 is used.

[0218] The upper layer parameter frequencyDensity in PTRS-UplinkConfig is RBi (i=0,1). N RBi (i=0,1), that is, N RB0 , N RB1 may be set with a value between 1 and 276. RB0 , N RB1 The values ​​of are 1≦N RB0 ≦N RB1 ≦276.

[0219] The upper layer parameter timeDensity in PTRS-UplinkConfig is the time density threshold ptrs-MCS i =ptrs-MCS i+1 If we denote by L, the time density L of the relevant table rows for which both thresholds exist in Fig. 7(a), PT-RS may be considered invalid. For example, if ptrs-MCS1 = ptrs-MCS2, then the second line in Figure 7(a) (ptrs-MCS1 = < I MCS < ptrs-MCS2 line) MAY be considered not valid.

[0220] The upper layer parameter frequencyDensity in PTRS-UplinkConfig is set to the frequency density threshold N RBi =N RBi+1 If we denote by K the frequency density of the relevant table rows in Fig. 7(b) where both these thresholds exist, PT-RS MAY be considered invalid. For example, NRB0 =N RB1 If so, the second row of Figure 7(b) (N RB0 =< N RB < N RB1 lines) may be considered not valid.

[0221] In Fig. 7, the PT-RS time density (L PT-RS ) and PT-RS frequency density (K PT-RS ) is set as "PT-RS does not exist", the terminal device 1 may assume that the PT-RS does not exist.

[0222] When the terminal device 1 is scheduled to transmit a PUSCH with an allocation period of 2 symbols or less, and L PT-RS If L is set to 2 or 4, the terminal device 1 does not need to transmit the PT-RS. Also, when the terminal device 1 is scheduled to transmit a PUSCH with an allocation period of 4 symbols or less, and L PT-RS If is set to 4, terminal device 1 does not need to transmit PT-RS.

[0223] When the terminal device 1 is scheduled to transmit a PUSCH for retransmission, the terminal device 1 MCS >V, the MCS for PT-RS time density determination may be derived from the DCI for the same transport block of the initial transmission, where V may be MCS index 28 in Figure 8 or MCS index 27 in Figure 9. The MCS derived from the DCI for the same transport block of the initial transmission may be less than or equal to V.

[0224] The maximum number of configured PT-RS ports may be given by the upper layer parameter maxNrofPorts in PTRS-UplinkConfig. The terminal device 1 is not expected to be configured with a number of PT-RS ports greater than the number of PT-RS ports configured by maxNrofPorts. The number of PT-RS ports may be the number of PT-RS antenna ports.

[0225] If the terminal device 1 reports capability information indicating that it supports full coherent UL transmission, the terminal device 1 may expect that if a UL PT-RS is configured, the number of UL PT-RS ports will be set to 1. In other words, if the base station device 3 receives a report of capability information from the terminal device 1 indicating that it supports full coherent UL transmission, the base station device 3 may set the number of UL PT-RS ports for the terminal device 1 to 1.

[0226] For a codebook or non-codebook based UL transmission, the association between one or more UL PT-RS ports and one or more DM-RS ports may be signaled by the PT-RS association field of DCI format 0_1. For a PUSCH corresponding to a CUL type 1 transmission, the terminal device 1 may assume an association between one or more PT-RS ports and one or more DM-RS ports by a value 0 of the PTRS-DMRS association for UL PTRS port 0 field or a value 00 of the PTRS-DMRS association for UL PTRS port 0 and 1 field in DCI format 0_1.

[0227] For a PUSCH scheduled by DCI format 0_0 or activation DCI format 0_0, the UL PT-RS port may be associated with DM-RS port 0.

[0228] For non-codebook based UL transmission, the actual number of UL PT-RS ports for transmission may be determined based on SRS resource indicator (SRI) in DCI format 0_1 ​​or higher layer parameter sri-ResourceIndicator in rrc-ConfiguredUplinkGrant. If the higher layer parameter phaseTrackingRS in DMRS-UplinkConfig is configured in the terminal device 1, the PT-RS port index for each configured SRS resource may be configured by the higher layer parameter ptrs-PortIndex configured by SRS-Config. If the PT-RS port indexes associated with different SRIs are the same, the corresponding one or multiple UL DM-RSs may be associated with one PT-RS port.

[0229] For UL transmission based on partial coherent and non-coherent codebooks, the actual number of UL PT-RS ports may be determined based on the Transmit Precoding Matrix Indicator (TPMI) in DCI format 0_1, and / or the Transmit Rank Indicator (TRI), and / or the number of layers indicated by the Precoding information and number of layers field in DCI format 0_1, and / or the number of layers set by the higher layer parameter precodingAndNumberOfLayers. Assuming that the higher layer parameter maxNrofPorts in PTRS-UplinkConfig is set to 'n2', the actual UL PT-RS ports and associated transmission layers are obtained from the indicated TPMI, where PUSCH antenna ports 1000 and 1002 in the indicated TPMI share PT-RS port 0, and PUSCH antenna ports 1001 and 1003 in the indicated TPMI share PT-RS port 1. UL PT-RS Port 0 may be associated with UL layer [x] of the multiple layers transmitted with PUSCH antenna ports 1000 and 1002 in the indicated TPMI, and UL PT-RS Port 1 may be associated with UL layer [y] of the multiple layers transmitted with PUSCH antenna ports 1001 and 1003 in the indicated TPMI. The UL layers [x] and / or [y] may be given by the PTRS-DMRS association field in DCI format 0_1.

[0230] In the uplink, the terminal device 1 p ={1,2} PT-RS ports (one PT-RS port or two PT-RS ports), and the number of scheduled layers is n PUSCH layer If the upper layer parameter ptrs-Power is set in the terminal device 1, the power ratio ρ from PUSCH to PT-RS for each RE and layer is PUSCH PTRS is ρPUSCH PTRS =-α PUSCH PTRS Q may be given in dB. p may be used to indicate the number of PT-RS ports. PUSCH PTRS is shown by Fig. 14, which corresponds to the upper layer parameter ptrs-Power, and the PT-RS scaling factor β PTRS is β PTRS =10^(-ρ PUSCH PTRS / 20) and in Precoding Information and Number of Layers of DCI. In the case of a non-codebook-based PUSCH or if ptrs-Power is not set, the terminal device 1 may assume that PTRS-UplinkConfig is set to state "00". FIG. 14 shows an example of α according to one embodiment of the present invention. PUSCH PTRS FIG. PUSCH PTRS may be determined based on the number of PUSCH layers, the type of transmission scheme for the PUSCH, and the type of codebook subset.

[0231] Next, a PT-RS transmission procedure in the terminal device 1 when modified precoding according to one aspect of this embodiment is enabled will be described.

[0232] When modified precoding is enabled, and if the upper layer parameter transformPrecoderEnabled in the PTRS-UplinkConfig is set, the terminal device 1 assumes that one or more upper layer parameters sampleDensity are set, and the terminal device 1 assumes that the presence of PT-RS antenna ports and the corresponding scheduled bandwidth in the corresponding BWP, as shown in FIG. 15, are a function of the PT-RS group pattern. The terminal device 1 assumes that the N RB0> 1, or RNTI is equal to TC-RNTI and the number of scheduled RBs (bandwidth) is N RB0 When the timeDensityTransformPrecoding parameter is less than the timeDensityTransformPrecoding parameter, it may be assumed that the PT-RS does not exist. PT-RS = 2 may be set. Otherwise, when modified precoding is enabled, the terminal device 1 may set L PT-RS = 1. The upper layer parameter sampleDensity is the sample density threshold N RBi =N RBi+1 If we show that both thresholds exist in FIG. 15, the associated row is not valid. For example, N RB0 =N RB1 If so, the top row (N RB0 =< N RB < N RB1 15 is a diagram showing a PUSCH DM-RS configuration type according to one aspect of the present embodiment.

[0233] The upper layer parameter sampleDensity in PTRS-UplinkConfig is N RBi (i=0,1,2,3,4). RBi (i=0,1,2,3,4), that is, N RB0 , N RB1 , N RB2 , N RB3 , N RB4 , may be set with a value between 1 and 276. RB0 , N RB1 , N RB2 , N RB3 , N RB4 The values ​​of are 1≦N RB0 ≦N RB1 ≦N RB2 ≦N RB3 ≦N RB4 Each value may be given such that ≦276.

[0234] When modified precoding is enabled, and if the higher layer parameter transformPrecoderEnabled in the PTRS-UplinkConfig of the terminal device 1 is set, the PT-RS scaling factor β′ may be determined by the scheduled modulation order as shown in Fig. 16. Fig. 16 is a diagram showing the PT-RS scaling factor when modified precoding according to one aspect of the present embodiment is enabled.

[0235] Next, sequence generation for physical resources of a PT-RS for a PUSCH and mapping to physical resources according to one aspect of this embodiment will be described.

[0236] If modified precoding is not enabled, the precoded PT-RS for subcarrier k of layer j may be given based on the sequence generation of FIG.

[0237] FIG. 17 is a diagram illustrating the generation of a sequence of PT-RS for PUSCH when modified precoding is not enabled according to one embodiment of the present invention. The antenna port associated with PT-RS transmission may be given based on the above-mentioned procedure. r(m) may be given based on the sequence of DM-RS for PUSCH. r(m) may be given at the position of the first DM-RS symbol if PUSCH intra-slot frequency hopping is not performed, and may be given at the position of the first DM-RS symbol per hop if PUSCH intra-slot frequency hopping is performed.

[0238] If the modified precoding is effective, the sequence r of the PT-RS mapped at the position m before the modified precoding is m (m') may be generated based on the sequence generation of FIG.

[0239] 18 is a diagram showing the generation of a PT-RS sequence for a PUSCH when modified precoding according to one aspect of this embodiment is enabled. In this embodiment, m is the number of PT-RS groups N PT-RS group , the number of samples per PT-RS group, N group samp , and the number of subcarriers M corresponding to the scheduled bandwidth used for PUSCH transmission PUSCH SC c(i) is a pseudorandom sequence, and the pseudorandom sequence generator may generate c(i) at a certain time. init l may be initialized with the slot n containing the PT-RS. μ s,f This is the lowest OFDM symbol number among the PUSCH arrangements in ID may be given by a higher layer parameter nPUSCH-Identity. w(i) may be given by Fig. 19. Fig. 19 is a diagram showing an example of an orthogonal sequence w(i) according to one aspect of the present embodiment.

[0240] Next, precoding and mapping to physical resources when modified precoding according to one aspect of the present embodiment is not enabled will be described.

[0241] If the terminal device 1 indicates that the PT-RS is to be used in the PT-RS transmission procedure of the terminal device 1, the terminal device 1 transmits the PT-RS only in one or more resource blocks used for the PUSCH.

[0242] The PT-RS may be mapped to resource elements according to FIG. 20. FIG. 20 is a diagram showing mapping of the PT-RS according to one embodiment of the present invention. l is any of the OFDM symbols arranged for PUSCH transmission. The resource elements used for the PT-RS are not used for the DM-RS. k′ and Δ correspond to the antenna port and may be given by FIG. 21 and the DM-RS configuration type. The DM-RS configuration type may be given by the higher layer parameter DMRS-UplinkConfig. The precoding matrix W may be given based on the corresponding PUSCH. β PT-RS is a scaling factor used to adjust to a specified transmit power. FIG. 21 is a diagram illustrating various parameters for a DM-RS configuration type according to one embodiment of the present invention.

[0243] FIG. 22 is a flow diagram showing a set of one or more time indexes l defined in relation to the start of PUSCH arrangement when modified precoding according to one aspect of the present embodiment is not enabled. In step 2201, the terminal device 1 sets i=0 and l ref = 0. In step 2202, the interval max(l ref +(i-1)L PT-RS +1,l ref ),...,l ref +iL PT-RS If any symbol in overlaps with the symbol used for DM-RS, the terminal device 1 sets i=1 and ref Set l to the symbol index of the DM-RS symbol in case of single-symbol DM-RS, and set l to the symbol index of the second DM-RS symbol in case of double-symbol DM-RS, ref +iL PT-RS Step 2202 is repeated as long as l is within the PUSCH arrangement. In step 2203, the terminal device 1 ref +iL PT-RSIn step 2204, the terminal device 1 increments i by 1. In step 2205, the terminal device 1 adds l ref +iL PT-RS Step 2202 is repeated until L exceeds the PUSCH allocation. PT-RS ∈{1,2,4}.

[0244] The PT-RS is mapped to an OFDM symbol subsequent to the OFDM symbol to which the reference DM-RS is mapped.

[0245] For the purpose of PT-RS mapping, the resource block or blocks allocated for PUSCH transmission are numbered from 0 to N. RB The subcarriers corresponding to a set of one or more resource blocks are numbered from 0 to N, starting from the lowest frequency, to the highest, starting from the lowest frequency. RB SC N RB The subcarriers to which the terminal device 1 assumes that the PT-RS is mapped may be given by FIG.

[0246] FIG. 23 is a diagram showing a calculation formula used to estimate a subcarrier k to which a PT-RS is mapped according to one aspect of the present embodiment. i is 0, 1, 2,.... k RE ref may be given by FIG. 24, which shows the offset (frequency offset) for the DM-RS port relative to the PT-RS port. If the higher layer parameter resourceElementOffset in PTRS-DownlinkConfig is not set, one or more values ​​shown in the column corresponding to offset00 may be used. RNTIN is the RNTI associated with the DCI that schedules the transmission using C-RNTI, CS-RNTI, MCS-C-RNTI, SP-CSI-RNTI, or CS-RNTI in case of CUL (Configured UL, configured grant). RB is the number of scheduled resource blocks. PT-RS may be given by the procedure associated with FIG. RE ref may correspond to the frequency offset of the RE level within one RB. PT-RS and k RB ref may correspond to a frequency offset at the RB level.

[0247] FIG. 24 shows a k RE ref FIG. RE ref may be determined based on the value of the DM-RS antenna port p, the DM-RS Configuration type, and the resourceElementOffset.

[0248] Next, mapping to physical resources when modified precoding is enabled will be described.

[0249] If the terminal device 1 indicates that the PT-RS is to be used in the PT-RS transmission procedure of the terminal device 1, the terminal device 1 transmits the PT-RS only in one or more resource blocks used for the PUSCH.

[0250] The sequence r(m′) is multiplied by β′ and ~(0) N in (m) group samp N PT-RS group is mapped to a complex-valued symbol. ~(0) (m) is one or more complex-valued symbols in OFDM symbol l before modified precoding. m is the number N of PT-RS groups according to FIG. PT-RSgroup , the number of samples per PT-RS group, N group samp , and the number of subcarriers M corresponding to the scheduled bandwidth used for PUSCH transmission PUSCH SC 25 may be based on the number of PT-RS groups, and k in FIG. 25 may be based on the number of samples per PT-RS group. β′ is the ratio between the amplitude of one of the outermost constellation points for π / 2-BPSK and the amplitude of one of the outermost constellation points for the modulation scheme used for the PUSCH. FIG. 25 illustrates a PT-RS symbol mapping according to one embodiment of the present invention.

[0251] FIG. 26 is a flow diagram showing a set of one or more time indexes l defined in relation to the start of PUSCH placement when modified precoding according to one aspect of the present embodiment is not enabled. In step 2601, the terminal device 1 sets i=0 and l ref = 0. In step 2602, the interval max(l ref +(i-1)L PT-RS +1,l ref ),...,l ref +iL PT-RS If any symbol in overlaps with the symbol used for DM-RS, the terminal device 1 sets i=1 and ref Set l to the symbol index of the DM-RS symbol in case of single-symbol DM-RS, and set l to the symbol index of the second DM-RS symbol in case of double-symbol DM-RS, ref +iL PT-RS Step 2602 is repeated as long as l is within the PUSCH arrangement. In step 2603, the terminal device 1 ref +iL PT-RS In step 2604, the terminal device 1 increments i by 1. In step 2605, the terminal device 1 adds lref +iL PT-RS Step 2602 is repeated until L exceeds the PUSCH allocation. PT-RS ∈{1,2}, L PT-RS The value of may be given by the higher layer parameter timeDensityTransformPrecoding in PTRS-UplinkConfig. timeDensityTransformPrecoding is the OFDM symbol level time density L of the PT-RS for DFT-s-OFDM. PT-RS may be used when L indicates 2. If timeDensityTransformPrecoding is not set, the terminal device 1 PT-RS may be applied as 1.

[0252] Next, a PT-RS transmission procedure in coverage enhancement according to one aspect of the present embodiment will be described. Here, the terminal device 1 and the base station device 3 support at least one capability among various capabilities related to coverage enhancement. In response to an inquiry from the base station device 3, the terminal device 1 may transmit information indicating that it supports the capability related to coverage enhancement to the base station device 3.

[0253] When modified precoding is not enabled, the terminal device 1 sets the upper layer parameter phaseTrackingRS in the DMRS-UplinkConfig, sets the upper layer parameters timeDensity and frequencyDensity in the PTRS-UplinkConfig corresponding to the phaseTrackingRS, and sets the scheduled MCS index I MCS is smaller than ptrs-MCS1 and / or the scheduled bandwidth N RB But, N RB0 If the PT-RS is smaller than L, the terminal device 1 does not need to transmit the PT-RS. Here, when the setting related to coverage enhancement for the uplink is enabled, the terminal device 1 further PT-RS Let K be a first predetermined value.PT-RS The PT-RS may be mapped to the physical resources and transmitted assuming a second predetermined value.

[0254] For example, the base station device 3 may set N RB0 and N RB1 The base station device 3 cannot set the value of the scheduled bandwidth (N RB ) can be set to a value smaller than 1 PRB, the terminal device 1 cannot transmit the PT-RS in the PUSCH arrangement based on the description of FIG. 7. Therefore, if it is indicated that coverage enhancement is enabled based on a certain higher layer parameter, the terminal device 1 can transmit the PT-RS in the PUSCH arrangement even if the scheduled bandwidth is smaller than 1 PRB. PT-RS =1 or K PT-RS = 2.

[0255] When the scheduled bandwidth is smaller than 1 PRB and there are multiple DM-RS antenna ports, some of the resourceElementOffsets shown in FIG. 23 may not be selected. For example, when the scheduled bandwidth is 10 subcarriers, offset11 may not be selected for DM-RS Configuration type1, and offset10 and offset11 may not be selected for DM-RS Configuration type2. In other words, the selectable offsets may be limited according to the number of subcarriers in the scheduled bandwidth. Alternatively, the terminal device 1 may select k corresponding to each antenna port and offset. RE ref The value is modulated with the total number of DM-RS antenna ports, and the obtained value is multiplied by k RE ref It may also be used as.

[0256] When the base station device 3 schedules PUSCH transmission with a bandwidth smaller than one PRB and when the PT-RS is included in the PUSCH arrangement, the base station device 3 does not need to set the higher layer parameter frequencyDensity in the PTRS-UplinkConfig for the terminal device 1. Based on the setting, the terminal device 1 can always transmit the PUSCH including the PT-RS.

[0257] Note that the terminal device 1 does not need to expect that the total number of used DM-RS antenna ports is greater than the number of subcarriers in the scheduled bandwidth. In other words, multiple DM-RS antenna ports are connected to one k RE ref It is not expected that such information will be shared with others.

[0258] When modified precoding is enabled, N is given by the upper layer parameter sampleDensity in PTRS-UplinkConfig. RB0 From N RB4 The values ​​of each of the above may be equal to or greater than 1. Note that when modified precoding is enabled, the higher layer parameter sampleDensity in PTRS-UplinkConfig may be a higher layer parameter that is always set.

[0259] When modified precoding is enabled, the terminal device 1 sets the upper layer parameter phaseTrackingRS in the DMRS-UplinkConfig, sets the upper layer parameters timeDensityTransformPrecoding and sampleDensity in the PTRS-UplinkConfig corresponding to phaseTrackingRS, and sets the scheduled MCS index I MCS is smaller than ptrs-MCS1 and / or the scheduled bandwidth N RB But, N RB0If the PT-RS is smaller than L, the terminal device 1 does not need to transmit the PT-RS. Here, when the setting related to coverage enhancement for the uplink is enabled, the terminal device 1 further PT-RS The PT-RS may be mapped to physical resources and transmitted, assuming that the number of PT-RS groups is a third predetermined value, the number of PT-RS groups is a fourth predetermined value, and the number of samples per PT-RS group is a fifth predetermined value. In this case, the index m of one or more PT-RS samples in the OFDM symbol l before modified precoding may be determined based on the value obtained from FIG. 25 or may be determined based on a new definition. When the setting related to coverage enhancement is enabled and the scheduled bandwidth N RB But, N RB0 If the number of PT-RS groups is smaller than 1 (for example, s=0 in FIG. 25, or 0 to N RB -1(N RB PT-RS transmission may be performed assuming that the number of samples per PT-RS group is at least 1 (for example, k=0 in FIG. 25, or 0 to N RB -1(N RB In the case where N is expressed as the number of subcarriers, the PT-RS may be transmitted assuming one of the values. RB is M PUSCH SC may be also possible.

[0260] For example, "scheduling PUSCH transmission with a bandwidth smaller than one PRB" may mean that the number of subcarriers used for the PUSCH transmission is less than 12 subcarriers.

[0261] For example, "scheduling PUSCH transmission with a bandwidth smaller than 1 PRB" may mean that the number of subcarriers used for the PUSCH transmission at a certain time is less than 12 subcarriers. Here, the PUSCH transmission is performed at a first timing and a second timing, and a set of subcarriers used at the first timing may be different from a set of subcarriers used at the second timing. Also, the first timing may be different from the second timing. For example, the first timing may correspond to a first slot, and the second timing may correspond to a second slot different from the first slot. Also, the first timing may correspond to a first OFDM symbol, and the second timing may correspond to a second OFDM symbol different from the first OFDM symbol.

[0262] For example, "scheduling PUSCH transmission with a bandwidth smaller than 1 PRB" may indicate that PUSCH is transmitted with resources given in units of a bandwidth smaller than 1 PRB. For example, the resources related to the PUSCH transmission may be distributed over two bandwidths at a certain time. Each of the two bandwidths may be smaller than 1 PRB. For example, each of the two bandwidths may be composed of X consecutive subcarriers. Here, X may be a value smaller than 12.

[0263] This allows the terminal device 1 and the base station device 3 to transmit and receive the PT-RS even with resource mapping for coverage enhancement.

[0264] Various aspects of the device according to one aspect of this embodiment will be described below.

[0265] (1) In order to achieve the above object, the aspects of the present invention take the following measures. That is, a first aspect of the present invention is a terminal device, comprising: a receiving unit that receives a PTRS-UplinkConfig and a Downlink Control Information (DCI) format; and a transmitting unit that transmits a Physical Uplink Shared Channel (PUSCH) and a Phase Tracking Reference Signal (PT-RS) based on a value of a Frequency Domain Resource Assignment (FDRA) field included in the PTRS-UplinkConfig and the DCI format, wherein, when modified precoding is enabled, if the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than one Physical Resource Block (PRB), the transmitting unit does not transmit the PT-RS, and if the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than one PRB and an upper layer parameter indicating that coverage enhancement is enabled is set, the transmitting unit transmits the PT-RS together with the PUSCH.

[0266] (2) Also, a second aspect of the present invention is a terminal device of the first aspect, wherein when the modified precoding is not enabled, the transmitting unit determines whether to transmit the PT-RS together with the PUSCH based on whether the PTRS-UplinkConfig includes an upper layer parameter frequencyDensity when the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than 1 PRB.

[0267] (3) Also, a third aspect of the present invention is a base station device comprising: a transmitting unit that transmits a PTRS-Uplink Config and a Downlink Control Information (DCI) format; and a receiving unit that receives a Physical Uplink Shared Channel (PUSCH) and a Phase Tracking Reference Signal (PT-RS) based on a value of a Frequency Domain Resource Assignment (FDRA) field included in the PTRS-Uplink Config and the DCI format, wherein when modified precoding is set to be enabled and coverage enhancement is set to be enabled, the receiving unit receives the PUSCH assuming that the PT-RS is included in the PUSCH, regardless of the bandwidth scheduled for the PUSCH.

[0268] (4) Also, a fourth aspect of the present invention is a base station device of the third aspect, wherein when the transmitting unit sets the modified precoding to be ineffective, and when the transmitting unit sets a bandwidth smaller than one PRB (Physical Resource Block) for the PUSCH, and when the PT-RS is received together with the PUSCH, the transmitting unit sets the PTRS-UplinkConfig without including the higher layer parameter frequencyDensity.

[0269] (5) Also, a fifth aspect of the present invention is a method for use in a terminal device, comprising the steps of: receiving a PTRS-Uplink Config and a Downlink Control Information (DCI) format; transmitting a Physical Uplink Shared Channel (PUSCH) and a Phase Tracking Reference Signal (PT-RS) based on a value of a Frequency Domain Resource Assignment (FDRA) field included in the PTRS-Uplink Config and the DCI format; not transmitting the PT-RS when modified precoding is enabled and the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than one Physical Resource Block (PRB); and transmitting the PT-RS together with the PUSCH when the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than one PRB and an upper layer parameter indicating that coverage enhancement is enabled is set.

[0270] (6) Also, a sixth aspect of the present invention is the method of the sixth aspect, wherein when the modified precoding is not effective, If the value of the FDRA field is such that the bandwidth scheduled for the PUSCH is less than 1 PRB, the step of determining whether to transmit the PT-RS together with the PUSCH is based on whether the PTRS-UplinkConfig includes a higher layer parameter frequencyDensity.

[0271] (7) Moreover, a seventh aspect of the present invention is a method for use in a base station device, comprising the steps of: transmitting a PTRS-Uplink Config and a Downlink Control Information (DCI) format; receiving a Physical Uplink Shared Channel (PUSCH) and a Phase Tracking Reference Signal (PT-RS) based on a value of a Frequency Domain Resource Assignment (FDRA) field included in the PTRS-Uplink Config and the DCI format; and, when modified precoding is set to be enabled and coverage enhancement is set to be enabled, receiving the PUSCH assuming that the PT-RS is included in the PUSCH regardless of a bandwidth scheduled for the PUSCH.

[0272] (8) Moreover, an eighth aspect of the present invention is a method of the seventh aspect, which includes a step of setting the PTRS-UplinkConfig without including an upper layer parameter frequencyDensity when the modified precoding is set to be ineffective, when a bandwidth smaller than one PRB (Physical Resource Block) is set for the PUSCH, and when the PT-RS is received together with the PUSCH, when the modified precoding is set to be ineffective, the PTRS-UplinkConfig includes a bandwidth smaller than one PRB (Physical Resource Block).

[0273] The base station device 3 and the program operating in the terminal device 1 according to one aspect of the present invention may be a program (program that makes a computer function) that controls a CPU (Central Processing Unit) or the like so as to realize the functions of the above-mentioned embodiment according to one aspect of the present invention. Information handled by these devices is temporarily stored in a RAM (Random Access Memory) during processing, and is then stored in various ROMs such as a Flash ROM (Read Only Memory) or an HDD (Hard Disk Drive), and is read, modified, and written by the CPU as necessary.

[0274] In addition, a part of the terminal device 1 and the base station device 3 in the above-mentioned embodiment may be realized by a computer. In that case, a 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 into a computer system and executed to realize the control function.

[0275] The "computer system" here refers to a computer system built into the terminal device 1 or base station device 3, and includes hardware such as an OS and peripheral devices. Also, the "computer-readable recording medium" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, and storage devices such as hard disks built into the computer system.

[0276] Furthermore, the term "computer-readable recording medium" may include a medium that dynamically stores a program for a short period of time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, and a medium that stores a program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or client in such a case. The above program may be one that realizes part of the above-mentioned functions, or one that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

[0277] Furthermore, the base station device 3 in the above-described embodiment can also be realized as an aggregate (device group) consisting of a plurality of devices. Each of the devices constituting the device group may have some or all of the functions or functional blocks of the base station device 3 according to the above-described embodiment. It is sufficient for the device group to have all of the functions or functional blocks of the base station device 3. Furthermore, the terminal device 1 according to the above-described embodiment can also communicate with the base station device as an aggregate.

[0278] In addition, the base station device 3 in the above-mentioned embodiment may be an EUTRAN (Evolved Universal Terrestrial Radio Access Network) and / or an NG-RAN (NextGen RAN, NR RAN). In addition, the base station device 3 in the above-mentioned embodiment may have a part or all of the functions of an upper node for an eNodeB and / or a gNB.

[0279] In addition, some or all of the terminal device 1 and base station device 3 in the above-mentioned embodiment may be realized as an LSI, which is typically an integrated circuit, or may be realized as a chip set. Each functional block of the terminal device 1 and base station device 3 may be individually formed into a chip, or some or all of them may be integrated into a chip. The integrated circuit method is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. Furthermore, if an integrated circuit technology that replaces LSI appears due to advances in semiconductor technology, it is also possible to use an integrated circuit based on that technology.

[0280] In addition, in the above-described embodiment, a terminal device is described as an example of a communication device, but the present invention is not limited to this and can also be applied to terminal devices or communication devices such as stationary or non-movable electronic devices installed indoors or outdoors, for example, AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other household appliances.

[0281] Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes within the scope of the gist of the present invention are also included. In addition, one aspect of the present invention can be modified in various ways within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. In addition, configurations in which elements described in each of the above embodiments are replaced with elements that have the same effect are also included. [Industrial Applicability]

[0282] One aspect of the present invention can be used in, for example, a communication system, a communication device (for example, a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (for example, a communication chip), or a program. [Explanation of symbols]

[0283] 1(1A, 1B, 1C) Terminal equipment 3 Base station equipment 10, 30 Radio transmitter / receiver 11, 31 Antenna section 12, 32 RF section 13, 33 Baseband section 14, 34 Upper layer processing unit 15, 35 Media access control layer processing unit 16, 36 Radio resource control layer processing unit

Claims

1. A receiving unit for receiving a PTRS-UplinkConfig and a DCI (Downlink Control Information) format; A transmitter that transmits a Physical Uplink Shared Channel (PUSCH) and a Phase Tracking Reference Signal (PT-RS) based on a value of a Frequency Domain Resource Assignment (FDRA) field included in the PTRS-UplinkConfig and the DCI format, The transmission unit is When modified precoding is enabled, If the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than one PRB (Physical Resource Block), then do not transmit the PT-RS; If the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than one PRB, and if a higher layer parameter indicating that coverage enhancement is enabled is configured, transmit the PT-RS together with the PUSCH. Terminal device.

2. The transmission unit is When the modified precoding is not enabled, If the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is less than 1 PRB, the PTRS-UplinkConfig determines whether to transmit the PT-RS together with the PUSCH based on whether the higher layer parameter frequencyDensity is included in the PTRS-UplinkConfig. The terminal device according to claim 1.

3. A transmitter that transmits a PTRS-UplinkConfig and a DCI (Downlink Control Information) format; A receiving unit that receives a Physical Uplink Shared Channel (PUSCH) and a Phase Tracking Reference Signal (PT-RS) based on a value of a Frequency Domain Resource Assignment (FDRA) field included in the PTRS-UplinkConfig and the DCI format, The receiving unit is When modified precoding is set to be effective and coverage enhancement is set to be effective, the PT-RS is assumed to be included in the PUSCH and received, regardless of the bandwidth scheduled for the PUSCH. Base station equipment.

4. The transmission unit is When the modified precoding is not set, if a bandwidth smaller than one PRB (Physical Resource Block) is set for the PUSCH, The base station device according to claim 3, wherein when the PT-RS is received together with the PUSCH, the PTRS-UplinkConfig is set without including the higher layer parameter frequencyDensity.

5. receiving a PTRS-UplinkConfig and a Downlink Control Information (DCI) format; Transmitting a Physical Uplink Shared Channel (PUSCH) and a Phase Tracking Reference Signal (PT-RS) based on a value of a Frequency Domain Resource Assignment (FDRA) field included in the PTRS-UplinkConfig and the DCI format; When modified precoding is enabled, not transmitting the PT-RS if the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than one PRB (Physical Resource Block); If the value of the FDRA field indicates that the bandwidth scheduled for the PUSCH is smaller than one PRB, and if a higher layer parameter indicating that coverage enhancement is enabled is configured, transmitting the PT-RS together with the PUSCH. method.

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