Communication device, base station, and communication method

Abstract

A communication device (100) is provided with: a control unit (120); and a reception unit (112) that receives, from the base station (210), downlink control information (DCI) or a media access control unit (MAC CE) including conversion precoder information indicating whether or not to apply the conversion precoder. The control unit determines a target frequency resource that is a target of the conversion precoder information, and determines, on the basis of the conversion precoder information, whether or not to apply the conversion precoder to transmission of an uplink signal in the target frequency resource.

Description

[0001] Cross-references to related applications

[0002] This application is based on patent application No. 2022-126208 filed on August 8, 2022, and claims the benefit of priority. The entire contents of the patent application are incorporated into this specification by reference. Technical Field

[0003] The present disclosure relates to a communication device, a base station, and a communication method used in a mobile communication system. Background Art

[0004] In 3GPP (registered trademark, hereinafter referred to as the same) (3rd Generation Partnership Project), which is a standardization project for mobile communication systems, orthogonal frequency division multiplexing (OFDM) using a cyclic prefix (CP) (hereinafter referred to as "CP-OFDM") or discrete Fourier transform spreading (DFT spreading) OFDM (hereinafter referred to as "DFT-s-OFDM") can be applied as the waveform of the uplink signal. DFT-s-OFDM is CP-OFDM to which a function of performing DFT spreading (hereinafter referred to as "transform precoder") is applied. Therefore, it is possible to switch which waveform to use, DFT-s-OFDM or CP-OFDM, depending on whether the transform precoder is applied.

[0005] In 3GPP Releases 15 and 16, whether to apply a transform precoder is configured by a network (e.g., a base station) to a communication device using signaling of a radio resource control (RRC) layer (hereinafter referred to as "RRC signaling"). However, when RRC signaling is used, the processing delay in the communication device becomes larger than when signaling of a layer lower than the RRC layer is used, so there is a risk that whether to apply a transform precoder cannot be switched at an appropriate timing corresponding to the situation.

[0006] Therefore, research is underway on a technology that enables flexible control of uplink transmission by more dynamically switching the waveform of an uplink signal switched using RRC signaling (for example, refer to Non-Patent Document 1).

[0007] Prior art literature

[0008] Non-patent literature

[0009] Non-patent document 1: 3GPP proposal "RWS-210307" Summary of the invention

[0010] A communication device according to a first aspect includes: a control unit; and a receiving unit, which receives downlink control information (DCI) or a media access control element (MAC CE) including transform precoder information from a base station, wherein the transform precoder information indicates whether to apply a transform precoder. The control unit determines a target frequency resource as a target of the transform precoder information, and determines whether to apply the transform precoder to the transmission of an uplink signal in the target frequency resource based on the transform precoder information.

[0011] The base station involved in the second aspect includes: a control unit, which determines the target frequency resource as the target of the aforementioned transform precoder information, and the aforementioned transform precoder information indicates whether to apply the transform precoder; and a sending unit, which sends downlink control information (DCI) or a media access control unit (MAC CE) including the aforementioned transform precoder information to the communication device.

[0012] The communication method involved in the third aspect is a communication method performed by a communication device. The aforementioned communication method comprises: a step of receiving downlink control information (DCI) or a media access control element (MAC CE) including transform precoder information from a base station, the aforementioned transform precoder information indicating whether to apply a transform precoder; a step of determining a target frequency resource as a target of the aforementioned transform precoder information; and a step of determining whether to apply the aforementioned transform precoder to the transmission of an uplink signal in the aforementioned target frequency resource based on the aforementioned transform precoder information. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The objects, features, advantages and the like of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings.

[0014] Figure 1 It is a diagram showing the configuration of a mobile communication system involved in an embodiment.

[0015] Figure 2 It is a diagram showing a configuration example of a protocol stack according to an embodiment.

[0016] Figure 3 This is a diagram for explaining the application of the transform precoder.

[0017] Figure 4 It is a diagram showing the configuration of the UE involved in the implementation manner.

[0018] Figure 5 It is a diagram showing the configuration of a base station involved in the embodiment.

[0019] Figure 6 It is a sequence diagram for explaining an example of operations involved in the embodiment. DETAILED DESCRIPTION

[0020] The mobile communication system according to the embodiment will be described with reference to the accompanying drawings. In the description of the drawings, the same or similar reference numerals are given to the same or similar parts.

[0021] However, in the existing 3GPP technical specifications, there is no specific mechanism for dynamically switching the waveform of the uplink signal using signaling of a layer lower than the RRC layer. Therefore, there is a concern that it is not possible to properly implement the use of signaling of a layer lower than the RRC layer to dynamically switch the waveform of the uplink signal and send it.

[0022] Therefore, one of the objects of the present disclosure is to provide a communication device, a base station, and a communication method that can dynamically switch the waveform of an uplink signal using signaling of a layer lower than the RRC layer and transmit it appropriately.

[0023] (System Configuration)

[0024] First, refer to Figure 1 , the configuration of the mobile communication system 1 involved in this embodiment is described. The mobile communication system 1 is, for example, a system that complies with the technical specification (Technical Specification: TS) of 3GPP. Hereinafter, as the mobile communication system 1, a 5th generation system (5G system) of the 3GPP standard, that is, a mobile communication system based on NR (New Radio) is described as an example.

[0025] The mobile communication system 1 includes a network 10 and a user equipment (UE) 100 communicating with the network 10. The network 10 includes a NG-RAN (Next Generation Radio Access Network) 20 which is a radio access network of 5G and a 5GC (5G Core Network) 30 which is a core network of 5G.

[0026] UE 100 is a communication device that communicates via base station 200. UE 100 may be a device used by a user. UE 100 is, for example, a mobile phone terminal such as a smartphone, a tablet terminal, a notebook PC (personal computer), a communication module, or a movable device such as a communication card. UE 100 may be a vehicle (e.g., a car, a train, etc.) or a device disposed therein. UE 100 may be a transport body other than a vehicle (e.g., a ship, an airplane, etc.) or a device disposed therein. UE 100 may be a sensor or a device disposed therein. In addition, UE 100 may also be referred to as a terminal, a terminal device, a mobile station, a mobile terminal, a mobile device, a mobile unit, a subscriber station, a subscriber terminal, a subscriber device, a subscriber unit, a wireless station, a wireless terminal, a wireless device, a wireless unit, a remote station, a remote terminal, a remote device, or a remote unit, etc., etc. In addition, UE 100 is an example of a terminal, and a factory device, etc. may be included in the terminal.

[0027] NG-RAN 20 includes multiple base stations 200. Each base station 200 manages at least one cell. A cell constitutes the smallest unit of a communication area. One cell belongs to one frequency (carrier frequency). The term "cell" sometimes refers to a wireless communication resource, and sometimes refers to a communication target of UE 100. Each base station 200 is capable of wireless communication with a UE 100 located in its cell. The base station 200 communicates with the UE 100 using the protocol stack of the RAN. Details of the protocol stack are described later. In addition, the base station 200 is connected to other base stations 200 (also referred to as neighboring base stations) via the Xn interface. The base station 200 communicates with neighboring base stations via the Xn interface. In addition, the base station 200 provides NR user plane and control plane protocol termination for the UE 100, and is connected to the 5GC 30 via the NG interface. Such an NR base station 200 is sometimes referred to as a gNodeB (gNB).

[0028] 5GC 30 includes a core network device 300. The core network device 300 includes, for example, AMF (Access and Mobility Management Function) and / or UPF (User Plane Function). AMF performs mobility management of UE 100. UPF provides functions dedicated to user plane (U-plane) processing. AMF and UPF are connected to the base station 200 via the NG interface.

[0029] (Configuration example of protocol stack)

[0030] Next, refer to Figure 2 , a configuration example of the protocol stack involved in this embodiment is described.

[0031] The protocol of the wireless section between UE 100 and base station 200 includes a physical (PHY) layer, a MAC (Medium Access Control) layer, an RLC (Radio Link Control) layer, a PDCP (Packet Data Convergence Protocol) layer, and an RRC layer.

[0032] The PHY layer performs encoding / decoding, modulation / demodulation, antenna mapping / demapping, and resource mapping / demapping. Data and control information are transmitted between the PHY layer of the UE 100 and the PHY layer of the base station 200 via a physical channel.

[0033] The MAC layer performs data priority control, retransmission processing using hybrid ARQ (HARQ), and random access procedures. Data and control information are transmitted between the MAC layer of the UE 100 and the MAC layer of the base station 200 via a transmission channel. The MAC layer of the base station 200 includes a scheduler. The scheduler determines the transmission format (transmission block size, modulation and coding scheme (MCS)) of the uplink and downlink and the allocated resources to the UE 100.

[0034] The RLC layer transmits data to the RLC layer of the receiving side using the functions of the MAC layer and the PHY layer. Data and control information are transmitted between the RLC layer of the UE 100 and the RLC layer of the base station 200 via a logical channel.

[0035] The PDCP layer performs header compression / decompression and encoding / decoding.

[0036] The SDAP (Service Data Adaptation Protocol) layer can be set as the upper layer of the PDCP layer. The SDAP (Service Data Adaptation Protocol) layer maps IP flows and radio bearers: IP flows are the units for QoS (Quality of Service) control in the core network, and radio bearers are the units for QoS control in the AS (Access Stratum).

[0037] The RRC layer controls logical channels, transport channels, and physical channels in response to the establishment, reestablishment, and release of radio bearers. RRC signaling for various configurations is transmitted between the RRC layer of the UE 100 and the RRC layer of the base station 200. In the case where an RRC connection exists between the RRC of the UE 100 and the RRC of the base station 200, the UE 100 is in an RRC connected state. In the case where there is no RRC connection between the RRC of the UE 100 and the RRC of the base station 200, the UE 100 is in an RRC idle state. In the case where the RRC connection between the RRC of the UE 100 and the RRC of the base station 200 is suspended, the UE 100 is in an RRC inactive state.

[0038] The NAS layer located above the RRC layer in UE 100 performs session management and mobility management of UE 100. NAS signaling is transmitted between the NAS layer of UE 100 and the NAS layer of core network device 300.

[0039] Furthermore, in addition to the protocol of the radio interface, the UE 100 also includes an application layer and the like.

[0040] (Radio frame configuration)

[0041] In the 5G system, downlink transmission and uplink transmission are configured in a radio frame of 10ms duration. For example, a radio frame includes 10 subframes. For example, a subframe can be 1ms. In addition, a subframe can also include more than one time slot. For example, the number of symbols constituting a time slot is 14 in a normal CP (Cyclic Prefix) and 12 in an extended CP. In addition, the number of time slots constituting a subframe varies according to the configured subcarrier spacing. For example, for a normal CP, when 15kHz is configured as the subcarrier spacing, the number of time slots per subframe is 1 (ie, 14 symbols), when 30kHz is configured as the subcarrier spacing, the number of time slots per subframe is 2 (ie, 28 symbols), when 60kHz is configured as the subcarrier spacing, the number of time slots per subframe is 4 (ie, 56 symbols), and when 120kHz is configured as the subcarrier spacing, the number of time slots per subframe is 8 (ie, 128 symbols). In addition, for the extended CP, when 60 kHz is configured as the subcarrier spacing, the number of time slots per subframe is 4 (i.e., 48 symbols). That is, based on the subcarrier spacing configured by the base station 200, the number of time slots constituting one subframe is determined. In addition, based on the subcarrier spacing configured by the base station 200, the number of symbols constituting one subframe is determined. That is, based on the subcarrier spacing configured by the base station 200, the number of symbols constituting a subframe of 1 ms is determined, and the length of each symbol (the length in the time direction) varies.

[0042] (Waveform)

[0043] Reference Figure 3 , the waveform in the mobile communication system 1 involved in the implementation method is described. The waveform of the signal sent and received in the mobile communication system 1 may be cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM). In the mobile communication system 1 based on the 5G system, the downlink transmission waveform may be ODFM using a cyclic prefix (CP). The uplink transmission waveform may be ODFM using a transform precoding function and a CP, and the aforementioned transform precoding function performs DFT expansion that can be enabled (disabled) or disabled (enabled). In the action of shared spectrum channel access using FR (Frequency Range: frequency range) 1, the subcarrier mapping of the uplink transmission waveform can be mapped to subcarriers at the interlacing of more than one physical resource block (PRB).

[0044] For example, either CP-OFDM or DFT-s-OFDM can be used for uplink signals such as a physical uplink shared channel (PUSCH) and / or a phase tracking reference signal (PTRS). On the other hand, CP-OFDM can be used for downlink signals such as a physical downlink shared channel (PDSCH). In addition, CP-OFDM can also be used for signals used for direct communication between UEs 100, such as bypass signals (e.g., physical bypass shared channel (PSSCH)).

[0045] Since CP-OFDM is a multi-carrier waveform, it has the advantage of strong resistance to multipath interference, but has the disadvantage of increased peak to average power ratio (PAPR). In addition, since CP-OFDM is a multi-carrier waveform, it is possible to frequency-division multiplex the transmission data sequence and the reference signal (RS) onto different subcarriers of the same symbol. In addition, the transmission frequency band of the transmission signal of CP-OFDM is not limited to a continuous frequency band (e.g., more than one continuous physical resource block (PRB)), but may also include discontinuous frequency bands (e.g., multiple discontinuous PRBs), so there are fewer scheduling restrictions compared to DFT-s-OFDM. Therefore, for example, in a cell where the load is higher than a predetermined level, the frequency utilization efficiency can be improved by using CP-OFDM.

[0046] Since DFT-s-OFDM is a single-carrier waveform, it is possible to reduce PAPR compared to CP-OFDM. Therefore, power close to the maximum rated power can be used, and a higher-order modulation scheme and / or a higher coding rate can be used. As a result, the power consumption of UE 100 and / or the cost of UE 100 can be reduced. In addition, it is easy to ensure the coverage area. On the other hand, in DFT-s-OFDM, the transmission data sequence and RS of a specific UE 100 are time-division multiplexed into different symbols. That is, the transmission data sequence and RS of a specific UE 100 are not frequency-division multiplexed onto different subcarriers of the same symbol, unlike CP-OFDM. In addition, the transmission band of the transmission signal of DFT-s-OFDM is limited to a continuous frequency band (for example, more than one continuous PRB).

[0047] like Figure 3 As shown in A, DFT-s-OFDM has a transform precoder. Figure 3 B Figure 5 (B) is different from the CP-OFDM shown. DFT-s-OFDM is CP-OFDM to which a transform precoder is applied. The transform precoder may be a function of performing DFT expansion. The transform precoder may be replaced by transform precoding, DFT precoding, or DFT precoding, etc.

[0048] In DFT-s-OFDM, the coded and modulated transmission data sequence or RS is input into the DFT of M points and converted from the time domain to the frequency domain. The output from the DFT is mapped to M subcarriers and input into the Inverse Fast Fourier Transform (IFFT) of N points and converted from the frequency domain to the time domain. In addition, the DFT can be replaced by the Fast Fourier Transform (FFT) and the IFFT can be replaced by the Inverse Discrete Fourier Transform (IDFT). N>M, and the input information for the unused IFFT is configured to be zero. N can be equal to the number of subcarriers corresponding to a predetermined frequency bandwidth (e.g., bandwidth part (BWP) or cell bandwidth). M can be the number of subcarriers corresponding to the transmission bandwidth. Thus, the output of the IFFT is a signal with small instantaneous power fluctuations and a bandwidth depending on M. The output from the IFFT is converted from Parallel to Serial (P / S) and a CP is added. The CP is also called a guard interval (GI). In this way, in DFT-s-OFDM, a signal having a single carrier characteristic is generated and transmitted in one symbol. In addition, a CP may be inserted before performing P / S conversion on the output from IFFT.

[0049] In CP-OFDM, the coded and modulated transmission data sequence and / or RS are mapped to a number of subcarriers equal to the transmission bandwidth and input into the IFFT. The input information for the unused IFFT is configured as zero. The output from the IFFT is P / S converted and inserted into the CP. In this way, in CP-OFDM, multiple carriers are used, so that the RS and the transmission data sequence can be frequency-division multiplexed. In addition, it is obvious that the transmission data sequence can also be sent without frequency-division multiplexing with the RS.

[0050] As described above, since the characteristics of DFT-s-OFDM and CP-OFDM are in a trade-off relationship, it is desirable to switch DFT-s-OFDM and CP-OFDM according to various parameters (e.g., cell load, scheduling status, antenna status, etc.). In addition, DFT-s-OFDM and CP-OFDM are switched depending on whether a transform precoder is applied.

[0051] In Releases 15 and 16 of 3GPP, whether to apply a transform precoder is configured by the network 10 (e.g., the base station 200) to the UE 100 using signaling of the radio resource control (RRC) layer (hereinafter referred to as "RRC signaling"). However, since the processing delay in the communication device becomes larger when using RRC signaling than when using signaling of a layer lower than the RRC layer, there is a risk that whether to apply a transform precoder cannot be switched at an appropriate timing corresponding to the situation. Therefore, a technology is being studied that can flexibly control uplink transmission by more dynamically switching the waveform of the uplink signal switched using RRC signaling.

[0052] However, in the existing 3GPP technical specifications, there is no specific mechanism for dynamically switching the waveform of the uplink signal using the signaling of a layer lower than the RRC layer. Therefore, there is a concern that it is not possible to properly implement the waveform of the uplink signal dynamically switched and sent using the signaling of a layer lower than the RRC layer. In one embodiment described below, an operation of dynamically switching the waveform of the uplink signal using the signaling of a layer lower than the RRC layer and properly sending it is described.

[0053] For example, in the case of dynamically switching the waveform of the uplink signal using low-layer signaling, there is no provision for the target of the instruction related to whether to apply the transform precoder. For example, there is no provision for which serving cell and / or which uplink bandwidth part (UL BWP) the instruction applies to PUSCH transmission and reception. Therefore, there is a concern that PUSCH transmission and reception cannot be performed between the base station 200 and the UE 100.

[0054] In addition, there is no provision regarding the application of parameters (e.g., radio resource control (RRC) parameters) associated with the dynamic switching of the transform precoder. For example, there is no provision as to which parameter configured in the RRC layer the dynamic transform precoder switching is applied. Therefore, there is a concern that uplink signals cannot be properly transmitted and received between the base station 200 and the UE 100. In one embodiment described later, an operation for enabling the transform precoder to be dynamically switched using appropriate parameters is described.

[0055] (Configuration information related to transform precoder)

[0056] The configuration information related to the transform precoder may be, for example, at least any one of the following information. The configuration information may be transmitted from the base station 200 to the UE 100 using a radio resource control (RRC) message. That is, the base station 200 may transmit an RRC message to the UE 100, the RRC message including the configuration information related to the transform precoder. In addition, the UE 100 may determine whether to apply the transform precoder to the uplink signal based on the configuration information included in the RRC message.

[0057] First, the configuration information related to the transform precoder can be configuration information (e.g., PUSCH-config) for configuring communication device-specific physical uplink shared channel (PUSCH) parameters applicable to a specific bandwidth part (BWP). PUSCH-config is included in information (e.g., BWP-UplinkDedicated) for configuring UE-specific parameters for one uplink BWP. PUSCH transmission is scheduled using a downlink control information (DCI) format (i.e., a DCI format for scheduling of PUSCH) to which a cyclic redundancy check (CRC) (CRC parity bit) scrambled using a cell radio network temporary identifier (C-RNTI) is added.

[0058] Using the transform precoder information (specifically, transformPrecoder) as a parameter included in PUSCH-config, the UE 100 is configured to enable or disable transform precoding for PUSCH transmission. The transform precoder information (transformPrecoder) is used for UE-specific selection of the transform precoder for PUSCH. In the case where the field of the transform precoder information (transformPrecoder) does not exist, the UE 100 applies the value of the field of "msg3-transformPrecoder". In addition, "msg3-transformPrecoder" is included in RACH-ConfigCommon.

[0059] Second, the configuration information related to the transform precoder can be configuration information (e.g., ConfiguredGrantConfig) for configuring uplink transmission without dynamic grant. ConfiguredGrantConfig can be used to configure uplink transmission without dynamic grant according to two possible schemes. The actual uplink grant can be configured via RRC or provided via the Physical Downlink Control Channel (PDCCH) (addressed to the Configured Scheduling-Radio Network Temporary Identifier (CS-RNTI)).

[0060] Specifically, the two types of transmissions without dynamic grants are CG (Configured Grant) type 1 PUSCH transmission and CG type 2 PUSCH transmission. In CG type 1 PUSCH transmission, an uplink grant is provided via RRC. The uplink grant is stored as a configured uplink grant. On the other hand, in CG type 2 PUSCH transmission, the uplink grant is provided by PDCCH. That is, the uplink grant is sent on PDCCH for scheduling of PUSCH and is provided by the DCI format accompanied by CS-RNTI. The uplink grant is saved or cleared as a configured uplink grant based on L1 signaling, which indicates the activation or deactivation of the configured uplink grant. CG type 1 PUSCH transmission and CG type 2 PUSCH transmission are configured by RRC for each BWP for the serving cell.

[0061] UE 100 saves the provided uplink grant and regards the saved uplink grant as occurring at a predetermined timing. The predetermined timing may be, for example, a timing according to a period and / or offset configured using an RRC message. UE 100 performs PUSCH transmission at the predetermined timing.

[0062] ConfiguredGrantConfig is included in BWP-UplinkDedicated, which is used to configure UE-specific parameters of an uplink BWP. ConfiguredGrantConfig includes transform precoder information (specifically, transformPrecoder). Using the transform precoder information (transformPrecoder) as a parameter included in ConfiguredGrantConfig, UE100 is configured to enable or disable transform precoding for CG type 1 PUSCH transmission / CG type 2 PUSCH transmission. Therefore, the transform precoder information (transformPrecoder) enables or disables the transform precoder used for type 1 and type 2. In the case where the field of the transform precoder information (transformPrecoder) does not exist, UE 100 enables or disables transform precoding according to the field of "msg3-transformPrecoder" in RACH-ConfigCommon described later.

[0063] Third, the configuration information related to the transform precoder may be configuration information (e.g., RACH-ConfigCommon) for specifying cell-specific random access (RA) parameters. RACH-ConfigCommon is used to specify cell-specific RA parameters. RACH-ConfigCommon may be configuration information related to a random access procedure. RACH-ConfigCommon is included in information (e.g., BWP-UplinkCommon) for configuring cell-specific parameters (i.e., common parameters) of an uplink BWP. RACH-ConfigCommon includes transform precoder information (msg3-transformPrecoder). msg3-transformPrecoder enables the transform precoder for Msg.3 transmission. In the case where the field of msg3-transformPrecoder does not exist, UE 100 disables the transform precoder. Therefore, using transform precoder information (msg3-transformPrecoder) as a parameter included in RACH-ConfigCommon, the UE 100 is configured with enabling (or disabling) of transform precoding for PUSCH transmission for Msg.3 (UL-SCH of Msg.3) in the random access procedure.

[0064] In addition, Msg.3 PUSCH transmission is scheduled by a random access (RA) response grant, or a DCI format to which a CRC scrambled with a temporary C-RNTI (TC-RNTI) is added (i.e., a DCI format for scheduling PUSCH). The RA response grant is included in Msg.2 (i.e., random access response). The RA response grant is sent as a MAC payload for the RA response.

[0065] Fourth, the configuration information related to the transform precoder may be configuration information (e.g., MsgA-PUSCH-Config) for specifying the allocation of a physical uplink shared channel (PUSCH) for message A in a two-step RA type procedure. MsgA-PUSCH-Config is used to specify the allocation of a PUSCH for message A in a two-step RA type procedure. MsgA-PUSCH-Config may be configuration information related to a random access procedure. MsgA-PUSCH-Config includes transform precoder information (msgA-TransformPrecoder). msgA-TransformPrecoder enables or disables the transform precoder for MsgA transmission. Using the transform precoder information (msgA-TransformPrecoder) as a parameter included in MsgA-PUSCH-Config, the UE 100 is configured to enable or disable transform precoding for PUSCH transmission for Msg.A (specifically, UL-SCH of Msg.A) in a random access procedure.

[0066] In addition, Msg.A PUSCH transmission is performed by PUSCH resources configured by parameters (eg, MsgA-PUSCH-Resource) included in MsgA-PUSCH-Config. MsgA-PUSCH-Resource is included in BWP-UplinkCommon, which is used to configure cell-specific parameters (common parameters) of one uplink BWP.

[0067] (UE procedure for applying transform precoding on PUSCH)

[0068] The UE procedure for applying transform precoding on PUSCH is described.

[0069] UE 100 can enable / disable transform precoding according to the transform precoder information (specifically, parameter: msg3-transformPrecoder) to apply PUSCH transmission scheduled by the uplink grant (UL grant) in the random access (RA) response (i.e., RA response grant) or PUSCH transmission scheduled by DCI format 0-0 scrambled by TC-RNTI (Temporry C-RNTI) CRC.

[0070] UE 100 may apply transform precoding enabled / disabled to Msg.A PUSCH transmission of RA process according to transform precoder information (specifically, parameter: msgA-TransformPrecoder). If parameter: msgA-TransformPrecoder is not configured, UE 100 may apply transform precoding enabled / disabled to Msg.APUSCH transmission according to parameter: msg3-transformPrecoder.

[0071] UE 100 may enable / disable transform precoding for PDCCH with NDI=1 and scrambled with CS-RNTI, C-RNTI or MCS-C-RNTI CRC, or PUSCH transmission scheduled thereby in the following cases (i) and (ii).

[0072] (i) If DCI format 0_0 is received (ie, PUSCH transmission is scheduled by DCI format 0_0), the UE 100 may apply transform precoding enabled / disabled according to the parameter: msg3-transformPrecoder.

[0073] (ii) If DCI format 0_0 is not received (i.e., PUSCH transmission is scheduled by DCI format 0_1 / 0_2), (a) in the case where the parameter: transformPrecoder included in PUSCH-Config is configured, the UE 100 may apply the enabled / disabled transform precoding in accordance with the transformPrecoder as a parameter included in pusch-Config. (ii) If DCI format 0_0 is not received, (b) in the case where the parameter: transformPrecoder included in PUSCH-Config is not configured, the UE 100 may apply the enabled / disabled transform precoding in accordance with the parameter: msg3-transformPrecoder.

[0074] UE 100 may apply transform precoding enabled / disabled to PUSCH transmission based on a configured grant in the following cases (i) and (ii). (i) If the parameter: transformPrecoder included in ConfiguredGrantConfig is configured, UE 100 may apply transform precoding enabled / disabled in accordance with the parameter: transformPrecoder included in ConfiguredGrantConfig. (ii) If the parameter: transformPrecoder included in ConfiguredGrantConfig is not configured, UE 100 may apply transform precoding enabled / disabled in accordance with the parameter: msg3-transformPrecoder.

[0075] As described above, whether to apply the transform precoder is switched by RRC signaling. In addition, whether to apply the transform precoder can be replaced by whether to enable the transform precoder or whether to activate the transform precoder.

[0076] (UE configuration)

[0077] Reference Figure 4 , the configuration of the UE 100 involved in the embodiment is described. The UE 100 includes a communication unit 110 and a control unit 120.

[0078] The communication unit 110 performs wireless communication with the base station 200 by sending and receiving wireless signals with the base station 200. The communication unit 110 includes at least one transmitting unit 111 and at least one receiving unit 112. The transmitting unit 111 and the receiving unit 112 can be configured to include multiple antennas and RF circuits. The antenna converts the signal into an electric wave and radiates the electric wave into space. In addition, the antenna receives the electric wave in the space and converts the electric wave into a signal. The RF circuit performs analog processing of the signal sent and received via the antenna. The RF circuit may include a high-frequency filter, an amplifier, a modulator, a low-pass filter, etc.

[0079] The control unit 120 performs various controls in the UE 100. The control unit 120 controls the communication with the base station 200 via the communication unit 110. The above-mentioned and later-mentioned actions of the UE 100 may be actions controlled by the control unit 120. The control unit 120 may include at least one processor capable of executing a program and a memory storing the program. The processor may execute the program to perform the actions of the control unit 120. The control unit 120 may include a digital signal processor that performs digital processing of signals sent and received via an antenna and an RF circuit. The digital processing includes processing of a protocol stack of the RAN. In addition, the memory stores a program executed by the processor, parameters related to the program, and data related to the program. The memory may include at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ReadOnly Memory), an EEPROM (Electrically Erasable ProgrammableRead Only Memory), a RAM (Random Access Memory), and a flash memory. All or a portion of the memory may be included within the processor.

[0080] In the UE 100 configured in this way, the receiving unit 112 receives downlink control information (DCI) or a media access control unit (MAC CE) including transform precoder information from the base station 200, and the transform precoder information indicates whether to apply the transform precoder. The control unit 120 of the UE 100 determines the target frequency resource as the target of the transform precoder information. The control unit 120 determines whether to apply the transform precoder to the transmission of the uplink signal in the target frequency resource based on the transform precoder information. As a result, the UE 100 can dynamically switch the waveform of the uplink signal and transmit it in the target frequency resource as the target of the transform precoder information.

[0081] In addition, the receiving unit 112 receives downlink control information (DCI) or a media access control element (MAC CE) including transform precoder information from the base station 200, the transform precoder information indicating whether to apply the transform precoder. Regarding the parameters configured for the target of the transform precoder information, the control unit 120 determines which parameter to use, a first parameter used when the transform precoder is applied and a second parameter used when the transform precoder is not applied. Thus, regarding the parameters configured for the target of the transform precoder information included in the DCI or MAC CE, the UE 100 can switch the parameters related to the application of the transform precoder by determining it as one of the first parameter and the second parameter, and dynamic parameter switching becomes possible.

[0082] (Base station configuration)

[0083] Reference Figure 5 , the configuration of the base station 200 involved in the embodiment is described. The base station 200 includes a communication unit 210, a network communication unit 220 and a control unit 230.

[0084] The communication unit 210, for example, receives a wireless signal from the UE 100 and sends a wireless signal to the UE 100. The communication unit 210 includes at least one transmitting unit 211 and at least one receiving unit 212. The transmitting unit 211 and the receiving unit 212 may be configured to include an RF circuit. The RF circuit performs analog processing of signals sent and received via an antenna. The RF circuit may include a high-frequency filter, an amplifier, a modulator, a low-pass filter, and the like.

[0085] The network communication unit 220 sends and receives signals with the network. The network communication unit 220 receives signals from, for example, an adjacent base station connected via an Xn interface as an interface between base stations, and sends signals to the adjacent base station. In addition, the network communication unit 220 receives signals from, for example, a core network device 300 connected via an NG interface, and sends signals to the core network device 300.

[0086] The control unit 230 performs various controls in the base station 200. The control unit 230 controls, for example, communication with the UE 100 via the communication unit 210. In addition, the control unit 230 controls, for example, communication with a node (e.g., a neighboring base station, a core network device 300) via the network communication unit 220. The actions of the base station 200 described above and below may be actions controlled by the control unit 230. The control unit 230 may include at least one processor capable of executing a program and a memory storing the program. The processor may execute the program to perform the actions of the control unit 230. The control unit 230 may include a digital signal processor that performs digital processing of signals sent and received via an antenna and an RF circuit. The digital processing includes processing of a protocol stack of the RAN. In addition, the memory stores a program executed by the processor, parameters related to the program, and data related to the program. All or part of the memory may be included in the processor.

[0087] In the base station 200 configured in this way, the control unit 230 determines the target frequency resource as the target of the transform precoder information, which indicates whether the transform precoder is applied. The transmission unit 211 transmits downlink control information (DCI) or media access control element (MAC CE) including the transform precoder information to the UE 100. As a result, the UE 100 can dynamically switch the waveform of the uplink signal in the target frequency resource as the target of the transform precoder information and transmit it. The base station 200 can receive the uplink signal whose waveform is dynamically switched.

[0088] (Action Example)

[0089] Reference Figure 6 , an operation example of the mobile communication system 1 is described.

[0090] Step S101:

[0091] The transmitting unit 111 of the UE 100 may transmit capability information indicating the capability of the UE 100 to the base station 200 , and the capability information is used to determine a predetermined time described later. The receiving unit 212 of the base station 200 may receive the capability information from the UE 100 .

[0092] The capability information may be, for example, a radio access capability for determining time resources (e.g., also referred to as resources in the time domain) for PUSCH transmission based on transform precoder information (hereinafter referred to as TP information or first TP information) included in DCI or MAC CE. The transmitting unit 111 of the UE 100 may, for example, send a UE capability information message (UECapabilityInformation) including the capability information to the base station 200.

[0093] The control unit 230 of the base station 200 can determine timing information described later based on the capability information from the UE 100 .

[0094] Step S102:

[0095] The transmission unit 211 of the base station 200 may transmit an RRC message including timing information for determining a timing (appropriately referred to as a predetermined timing) described later to the UE 100. The reception unit 112 of the UE 100 may receive the timing information from the base station 200.

[0096] As described later, the timing information is information for determining the timing (i.e., predetermined timing) after a predetermined time has passed since the TP information included in the DCI or MAC CE is received. The timing information may include, for example, information for determining the time resources for PUSCH transmission based on the TP information. The information may indicate the time slot, symbol, and / or starting position at which the PUSCH transmission is performed. For example, the timing information may be used to configure (specify) the relationship between the time slot, symbol, and / or starting position at which the DCI or MAC CE including the TP information is received, and the time slot, symbol, and / or starting position at which the PUSCH transmission is performed. When the DCI or MAC CE including the TP information is received in a specific time slot, a specific symbol, and / or a specific starting position, the UE 100 may perform PUSCH transmission based on the specific time slot, the specific symbol, and / or the specific starting position and the timing information.

[0097] The timing information may include information indicating the time until a predetermined timing, the predetermined timing being based on the reception of the PDCCH. The timing information may include information indicating an offset value from a reference value of normal PUSCH transmission, and may also include information indicating an offset value of a timing offset from a reference value of normal PUSCH transmission. The timing information may include information indicating a valid period of the transform precoder information.

[0098] The transmitting unit 211 of the base station 200 may send an RRC message including timing information to the UE 100. The RRC message may include configuration information related to the configuration of the PUSCH. The configuration information may include timing information applied separately to the configuration information. The timing information may include information common to multiple types of configuration information related to the PUSCH. The multiple types of configuration information may include, for example, at least any one of PUSCH-config, ConfiguredGrantConfig, RACH-ConfigCommon, and MsgA-PUSCH-Config.

[0099] In addition, the transmitting unit 211 of the base station 200 may transmit an RRC message including target designation information designating a target frequency resource described later to the UE 100. The receiving unit 112 of the UE 100 may receive the target designation information from the base station 200. Frequency resources are also called resources in the frequency domain.

[0100] The target designation information may include information for designating a serving cell. The target designation information may include information for designating a cell group. The target designation information may include information for designating an uplink BWP. That is, the target designation information may include an index of one or more cell groups, an index of one or more serving cells, and / or an index of one or more uplink BWPs. In this embodiment, designation may be used in the same sense as configuration.

[0101] In addition, the transmission unit 211 of the base station 200 may transmit an RRC message including both the first parameter and the second parameter to the UE 100. In addition, the transmission unit 211 of the base station 200 may transmit the first parameter and the second parameter to the UE 100 in separate RRC messages.

[0102] The first parameter and / or the second parameter may be a parameter configured for a target of transform precoder information. The first parameter is used when a transform precoder is applied. The second parameter is used when a transform precoder is not applied. The parameter (i.e., the first parameter and / or the second parameter) may be at least any one of the following parameters: a parameter associated with a sequence of a DMRS (demodulation reference signal) associated with a PUSCH; a parameter associated with a sequence of a PTRS associated with a PUSCH; and a parameter associated with determination of an MCS (Modulation and channel Coding Scheme: Modulation and channel coding scheme) table.

[0103] Hereinafter, for the sake of convenience of explanation, the following parameters used in the case of applying the transform precoder (i.e., in the case where the transform precoder is enabled) are recorded as the first parameters: a parameter associated with a sequence of DMRS, the DMRS being associated with PUSCH; a parameter associated with a sequence of PTRS, the PTRS being associated with PUSCH; and / or a parameter associated with the determination of the MCS table. However, of course, each of the following parameters used in the case of applying the transform precoder may also be a different parameter: a parameter associated with a sequence of DMRS, the DMRS being associated with PUSCH; a parameter associated with a sequence of PTRS, the PTRS being associated with PUSCH; and / or a parameter associated with the determination of the MCS table. For example, the parameter associated with the sequence of DMRS used in the case of applying the transform precoder may be the first parameter, the DMRS being associated with PUSCH. In addition, the parameter associated with the sequence of PTRS used in the case of applying the transform precoder may be the third parameter, the PTRS being associated with PUSCH. In addition, the parameter associated with the determination of the MCS table used in the case of applying the transform precoder may be the fourth parameter.

[0104] Similarly, the following parameters used when the transform precoder is not applied (i.e., when the transform precoder is disabled) are recorded as the second parameters: a parameter associated with a sequence of a DMRS associated with the PUSCH; a parameter associated with a sequence of a PTRS associated with the PUSCH; and / or a parameter associated with the determination of the MCS table. However, of course, each of the following parameters used when the transform precoder is not applied may also be a different parameter: a parameter associated with a sequence of a DMRS associated with the PUSCH; a parameter associated with a sequence of a PTRS associated with the PUSCH; and / or a parameter associated with the determination of the MCS table. For example, the parameter associated with the sequence of a DMRS used when the transform precoder is not applied may be the second parameter, and the DMRS is associated with the PUSCH. In addition, the parameter associated with the sequence of a PTRS used when the transform precoder is not applied may be the fifth parameter, and the PTRS is associated with the PUSCH. In addition, the parameter associated with the determination of the MCS table used when the transform precoder is not applied may be the sixth parameter.

[0105] Step S103:

[0106] The transmitting unit 211 of the base station 200 transmits a DCI or MAC CE including TP information to the UE 100. The receiving unit 112 of the UE 100 receives a DCI or MAC CE including TP information from the base station 200. The TP information indicates whether to apply a transform precoder. For example, the TP information may be information for indicating whether to apply a transform precoder to a corresponding PUSCH transmission. That is, the TP information may be information for indicating enabling or disabling of a transform precoder. In addition, the TP information may include target designation information.

[0107] The transmitting unit 211 may transmit DCI including TP information. Therefore, the transmitting unit 211 may transmit TP information through the physical layer (ie, L1 signaling). For example, the transmitting unit 211 may transmit DCI including TP information on PDCCH. In addition, the transmitting unit 211 may transmit MAC CE including TP information on PDSCH.

[0108] The DCI including the TP information may be a DCI format including the TP information. In addition, the DCI indicating whether the transform precoder is applied may be TP information. The DCI format including the TP information may be a DCI format for scheduling of the PDSCH, a DCI format for scheduling of the PUSCH, and / or a DCI format not used for scheduling of the PDSCH / PUSCH. A CRC parity bit scrambled with C-RNTI, CS-RNTI, and / or MCS-C-RNTI may be added to the DCI format including the TP information.

[0109] In addition, the DCI including TP information may be included in a PDCCH order. The PDCCH order may be used to initiate a random access (RA: Random Acess) procedure. The random access procedure initiated (or indicated) by a PDCCH order is also referred to as a contention-free random access (CFRA: Contention Free Random Access) procedure. For example, a four-step CFRA procedure or a two-step CFRA procedure may be initiated by a PDCCH order. In addition, when the CRC of DCI format 1_0 is scrambled with C-RNTI and the frequency domain resource allocation field (i.e., the frequency domain resource allocation field) is all "1", DCI format 1_0 may be used for a RA procedure initiated by a PDCCH order.

[0110] Here, DCI format 1_0 (for example, DCI format 1_0 to which CRC scrambled by C-RNTI is added) can be used for scheduling of PDSCH. That is, when all the values ​​of the frequency domain resource allocation fields included in DCI format 1_0 are set to "1", the DCI format 1_0 can be identified as a DCI format for PDCCH command. In addition, when any of the values ​​of the frequency domain resource allocation fields included in DCI format 1_0 is set to other than "1", the DCI format 1_0 can be identified as a DCI format for scheduling of PDSCH.

[0111] For example, in the case where DCI format 1_0 is used as a DCI format for a PDCCH command, information indicating a random access preamble may be included in the DCI format 1_0. In the RA process initiated by the PDCCH command, UE 100 may send the random access preamble. In addition, in the case where DCI format 1_0 is used as a DCI format for a PDCCH command, information indicating an index of SS / PBCH (Syncronization signal and / or PhysicalBroadcast channel) may be included in the DCI format 1_0. Here, in the case where DCI format 1_0 is used as a DCI format for a PDCCH command, TP information (which may be a DCI including TP information) may be included in the DCI format 1_0. For example, the spare bit of DCI format 1_0 for a PDCCH command may be used as TP information.

[0112] In addition, the transmitting unit 211 of the base station 200 may send an RRC message to the UE 100, the RRC message including information related to a field of TP information (which may be a DCI including TP information). The information may be information indicating the presence or absence of a field of TP information in the DCI (or DCI format) and / or information for determining the number of bits of the field. The control unit 120 of the UE 100 may determine (determine, identify) whether the TP information is included in the DCI (i.e., the presence or absence of TP information in the DCI) based on the information.

[0113] In addition, the sending unit 211 of the base station 200 may send an RRC message to the UE 100, the RRC message including configuration information for monitoring the PDCCH for the DCI (or DCI format), the DCI (or DCI format) including TP information. The configuration information may include: information for configuring a control resource set (e.g., CORESET(s)), the control resource set for monitoring the PDCCH for the DCI (or DCI format), the DCI (or DCI format) including TP information; and / or information for configuring a search space set (Search Space Set(s)), the search space set for monitoring the PDCCH for the DCI (or DCI format), the DCI (or DCI format) including TP information. The control unit 120 of the UE 100 may determine that the DCI received in the configured control resource set and / or search space set includes TP information. For example, the search space set includes a UE-specific search space set (also referred to as a USS set) and / or a common search space set (also referred to as a CSS set).

[0114] The transmitting unit 211 may transmit the TP information including the MAC CE. Therefore, the transmitting unit 211 may transmit the TP information in the MAC layer.

[0115] A MAC CE including TP information may be specified. In addition, the MAC CE may include: TP information; and a specific logical channel identifier (LCID) for identifying the MAC CE including TP information. The control unit 120 of the UE 100 may determine whether the MAC CE includes TP information based on the specific LCID.

[0116] The DCI or MAC CE may include target designation information. The MAC CE may include TP information and target designation information. The target designation information may include an index of one or more cell groups, an index of one or more serving cells, and / or an index of one or more uplink BWPs.

[0117] In addition, in this specification, TP information included in DCI or MAC CE is sometimes referred to as first TP information. TP information included in an RRC message is sometimes referred to as second TP information. In the following, unless otherwise specified, the TP information is described as the first TP information.

[0118] Step S104:

[0119] The control unit 120 of the UE 100 determines a target of the TP information. The control unit 120 determines a target frequency resource as a target of the TP information. The target frequency resource may be at least any one of a cell group, a serving cell, and a bandwidth part (e.g., an uplink bandwidth part (UL BWP)). That is, the control unit 120 of the UE 100 may determine a cell group, a serving cell, and / or a bandwidth part (e.g., an uplink bandwidth part (UL BWP)) to which the TP information is applied. In addition, the control unit 120 of the UE 100 may apply the TP information to the transmission of an uplink signal in the cell group, the serving cell, and / or the bandwidth part (e.g., an uplink bandwidth part (UL BWP)).

[0120] In addition, the control unit 120 may determine all configured service cells and / or all uplink BWPs as target frequency resources. For example, the control unit 120 may determine all service cells configured for the UE 100 and / or all uplink BWPs configured for the UE 100 as target frequency resources. Here, in a certain service cell, one or more uplink BWPs may be configured. For example, the base station may send an RRC message in each of the one or more service cells, and the RRC message includes information for configuring one or more uplink BWPs.

[0121] In addition, the control unit 120 may determine the target frequency resource based on the target designation information. When the target designation information includes information for designating a serving cell, the control unit 120 may determine the designated serving cell in the serving cell configured for the UE 100 as the target frequency resource. When the target designation information includes information for designating a cell group, the control unit 120 may determine the designated cell group in the cell group configured for the UE 100 as the target frequency resource. The cell group may be a primary cell group and / or a secondary cell group. When the target designation information includes information for designating an uplink BWP, the control unit 120 may determine the designated uplink BWP in the uplink BWP configured for the UE 100 as the target frequency resource. The control unit 120 may apply the TP information to the transmission of an uplink signal in the target frequency resource determined based on the target designation information.

[0122] In addition, in the case where the DCI is a DCI format including TP information, the control unit 120 may determine at least one of the serving cell and / or uplink BWP scheduled using the DCI format as the target frequency resource. That is, in the case where the DCI format including TP information is received, the control unit 120 may determine the serving cell and / or uplink BWP scheduled using the DCI format including TP information as the target frequency resource. For example, in the case where the DCI format including TP information is received, the control unit 120 may determine the serving cell and / or uplink BWP to which resources of the PUSCH scheduled using the DCI format including TP information are allocated as the target frequency resource. The control unit 120 may apply the TP information to the transmission of the uplink signal in the target frequency resource.

[0123] In addition, in the case where the DCI is a DCI format including TP information, the control unit 120 may determine the uplink component carrier corresponding to the downlink component carrier receiving the DCI format and / or the uplink BWP corresponding to the downlink BWP in which the DCI format is received as the target frequency resource. For example, the control unit 120 may determine the uplink BWP corresponding to the downlink BWP in which the DCI including TP information is detected (e.g., the uplink BWP with the same index as the downlink BWP) as the target frequency resource. That is, in the case where the DCI format including TP information is received, the control unit 120 may determine the serving cell (uplink serving cell) in which the DCI format including TP information is detected as the target frequency resource. As described above, the DCI format including TP information includes a DCI format for a PDCCH command.

[0124] In addition, the control unit 120 may determine the activated uplink BWP as the target frequency resource.

[0125] Step S105:

[0126] The control unit 120 of the UE 100 determines whether to apply the transform precoder to the transmission of the uplink signal (eg, PUSCH transmission) in the target frequency resource. The control unit 120 determines whether to apply the transform precoder based on the TP information.

[0127] When the TP information indicates that the transform precoder is applied, the control unit 120 may determine that the transform precoder is applied to the transmission of the uplink signal in the target frequency resource. On the other hand, when the TP information indicates that the transform precoder is not applied, the control unit 120 may determine that the transform precoder is not applied to the transmission of the uplink signal in the target frequency resource.

[0128] In the case of receiving an RRC message including the second TP information from the base station 200, the control unit 120 may select TP information from the first TP information and the second TP information for determining whether to apply the transform precoder. That is, in the case of receiving the first TP information and the second TP information, the control unit 120 may determine whether to apply the transform precoder based on one of the first TP information and the second TP information. For example, in the case of receiving the first TP information, even if the second TP information is configured (regardless of whether the second TP information is configured), the control unit 120 may determine whether to apply the transform precoder based on the first TP information. In addition, in the case of configuring the second TP information, even if the first TP information is received (regardless of whether the first TP information is received), the control unit 120 may determine whether to apply the transform precoder based on the second TP information.

[0129] In the case where the second TP information is included in at least one of the configuration information for configuring the communication device-specific PUSCH parameters applicable to a specific bandwidth part (uplink BWP) and / or the configuration information for configuring uplink transmission without a dynamic grant, the control unit 120 may select the first TP information. That is, in this case, the control unit 120 may determine whether to apply the transform precoder based on the first TP information. For example, the control unit may select the first TP information instead of the second TP information included in PUSCH-config and / or ConfiguredGrantConfig.

[0130] In the case where the second TP information is included in the configuration information related to the random access procedure, the control unit 120 may select the second TP information. That is, in this case, the control unit 120 may determine whether to apply the transform precoder based on the second TP information. The configuration information related to the random access procedure may be RACH-ConfigCommon and / or MsgA-PUSCH-Config.

[0131] That is, when whether to apply a transform precoder is configured based on the second TP information included in PUSCH-config and / or ConfiguredGrantConfig, and whether to apply a transform precoder is indicated based on the first TP information, the control unit 120 may determine whether to apply the transform precoder according to the first TP information. For example, the indication of the application of the transform precoder based on the first TP information may overwrite the configuration of the application of the transform precoder based on the second TP information. In addition, when whether to apply a transform precoder is configured based on the second TP information included in RACH-ConfigCommon and / or MsgA-PUSCH-Config, and whether to apply a transform precoder is indicated based on the first TP information, the control unit 120 may determine whether to apply the transform precoder according to the second TP information. For example, the indication of the application of the transform precoder based on the first TP information may not overwrite the configuration of the application of the transform precoder based on the second TP information (the configuration of the application of the transform precoder based on the second TP information may be maintained). Here, the control unit 120 may select the first TP information to replace the second TP information included in PUSCH-Config, ConfiguredGrantConfig, RACH-ConfigCommon and / or MsgA-PUSCH-Config. That is, when whether to apply the transform precoder is configured based on the second TP information included in PUSCH-Config, ConfiguredGrantConfig, RACH-ConfigCommon and / or MsgA-PUSCH-Config, and whether to apply the transform precoder is indicated based on the first TP information, the control unit 120 may always determine whether to apply the transform precoder according to the first TP information.

[0132] The control unit 120 switches whether to apply the transform precoder based on the TP information. In the case where the transform precoder is not applied to the transmission of the uplink signal in the target frequency resource, when it is determined based on the TP information that the transform precoder is applied, the control unit 120 performs switching control to use the waveform of DFT-s-OFDM. On the other hand, in the case where the transform precoder is applied to the transmission of the uplink signal in the target frequency resource, when it is determined based on the TP information that the transform precoder is not applied, the control unit 120 performs switching control to use the waveform of CP-OFDM.

[0133] The control unit 120 may determine the parameters for transmitting the uplink signal based on the TP information. Specifically, regarding the parameters configured for the target of the transform precoder information, the control unit 120 determines which parameter to use between the first parameter used when the transform precoder is applied (i.e., when the transform precoder is enabled) and the second parameter used when the transform precoder is not applied (i.e., when the transform precoder is disabled). For example, the control unit 120 uses the parameters determined as follows: a parameter associated with a sequence of DMRS, which is associated with PUSCH (which may also be PUSCH transmission); a parameter associated with a sequence of PTRS, which is associated with PUSCH (which may also be PUSCH transmission); and / or a parameter associated with the determination of an MCS (Modulation and channel Coding Scheme: Modulation and channel coding scheme) table. Here, the parameters associated with the determination of the MCS table may include parameters associated with the determination of an MCS table associated with PUSCH transmission.

[0134] The control unit 120 may use one of the first parameter and the second parameter based on whether the transform precoder is applied (i.e., based on whether the transform precoder is enabled or disabled). For example, in the case where the transform precoder is applied (i.e., in the case where the transform precoder is enabled), the control unit 120 may use the first parameter. In addition, in the case where the transform precoder is not applied (i.e., in the case where the transform precoder is disabled), the control unit 120 may use the second parameter. That is, the control unit 120 may determine which of the first parameter and the second parameter to use based on the TP information, and use the determined parameter to generate a sequence of DMRS associated with PUSCH. In addition, the control unit 120 may determine which of the first parameter and the second parameter to use based on the TP information, and use the determined parameter to generate a sequence of PTRS associated with PUSCH. In addition, the control unit 120 may determine which of the first parameter and the second parameter to use based on the TP information, and use the determined parameter to determine the MCS table. Here, the control unit 120 may use a parameter (the first parameter or the second parameter) associated with a target resource determined as a target of the TP information. For example, when a first parameter and / or a second parameter are configured for each of one or more uplink BWPs, the control unit 120 may use the first parameter and / or the second parameter configured for the target resource to which the TP information is applied (i.e., the uplink BWP to which the TP information is applied among the one or more uplink BWPs).

[0135] Here, the control unit 120 may suspend (or retain, temporarily stop) an unused parameter of the first parameter and the second parameter. That is, the control unit 120 may use one of the first parameter and the second parameter and suspend the other based on whether the transform precoder is applied (i.e., based on whether the transform precoder is enabled or disabled). For example, in the case of applying the transform precoder, the control unit 120 may use the first parameter and suspend the second parameter. In addition, in the case of not applying the transform precoder, the control unit 120 may use the second parameter and suspend the first parameter. Here, the control unit 120 may suspend parameters other than the parameter (first parameter or second parameter) associated with the target resource determined as the target of the TP information. For example, in the case where the first parameter and / or the second parameter are configured for each of one or more uplink BWPs, the control unit 120 may use the first parameter and / or the second parameter configured for the target resource to which the TP information is applied (i.e., the uplink BWP to which the TP information is applied in the one or more uplink BWPs), and suspend the parameters other than this (the first parameter and / or the second parameter). Therefore, the control unit 120 can, for example, consider the parameters corresponding to the indication of the TP information (i.e., associated with the target frequency resources determined as the target of the TP information) among the parameters configured using the RRC message as active, and suspend the parameters that do not correspond to the TP information (i.e., outside the target of the TP information).

[0136] For example, when the control unit 120 has an active transform precoder configuration and has not received an indication that the transform precoder configuration is invalid, the transform precoder configuration is an active BWP and can be considered to be active, otherwise, the transform precoder configuration can be considered to be suspended. The transform precoder configuration can correspond to whether the transform precoder is applied (i.e., enabling or disabling the transform precoder). In addition, the transform precoder configuration can include any one of the first parameter or the second parameter.

[0137] For example, as described above, when it is indicated (or configured) that the transform precoder is enabled, the control unit 120 may use the first parameter configured for the uplink BWP to which the transform precoder is applied (i.e., the active BWP on which the uplink signal is executed) (the first parameter may be considered to be active). In addition, when it is indicated (or configured) that the transform precoder is enabled, the control unit 120 may not use the second parameter configured for the uplink BWP to which the transform precoder is applied (i.e., the active BWP on which the uplink signal is executed) (the second parameter may be considered to be suspended).

[0138] In addition, when the deactivation of the transform precoder is indicated (or configured), the control unit 120 may not use the first parameter configured for the uplink BWP to which the transform precoder is not applied (i.e., the active BWP on which the uplink signal is executed) (the first parameter may be regarded as suspended). In addition, when the deactivation of the transform precoder is indicated (or configured), the control unit 120 may use the second parameter configured for the uplink BWP to which the transform precoder is not applied (i.e., the active BWP on which the uplink signal is executed) (the second parameter may be regarded as active).

[0139] Step S106:

[0140] The transmitting unit 111 of the UE 100 may transmit an uplink signal (e.g., a PUSCH) to the base station 200. The receiving unit 212 of the base station 200 may receive an uplink signal from the UE 100. For example, when the control unit 120 determines to apply a transform precoder (i.e., when the enablement of the transform precoder is indicated (or configured), the transmitting unit 111 transmits an uplink signal to which the transform precoder is applied in a target frequency resource. In addition, when the control unit 120 generates a sequence of DMRS associated with the PUSCH using the first parameter, the transmitting unit 111 may transmit the DMRS associated with the PUSCH. Here, the transmitting unit 111 may transmit the DMRS associated with the PUSCH in the target frequency resource to which the TP information is applied. In addition, when the control unit 120 generates a sequence of PTRS associated with the PUSCH using the first parameter, the transmitting unit 111 may transmit the PTRS associated with the PUSCH. Here, the transmitting unit 111 may transmit the PTRS associated with the PUSCH in the target frequency resource to which the TP information is applied. In addition, when the control unit 120 determines the MCS table using the first parameter, the transmitting unit 111 may perform transmission on the PUSCH according to the MCS table. Here, the transmitting unit 111 may perform transmission on the PUSCH according to the MCS table in the target frequency resource to which the TP information is applied.

[0141] In addition, when the control unit 120 determines that the transform precoder is not applied, the transmission unit 111 transmits an uplink signal to which the transform precoder is not applied in the target frequency resource. In addition, when the control unit 120 generates a sequence of DMRS associated with PUSCH using the second parameter, the transmission unit 111 can transmit the DMRS associated with the PUSCH. Here, the transmission unit 111 can transmit the DMRS associated with the PUSCH in the target frequency resource to which TP information is applied. In addition, when the control unit 120 generates a sequence of PTRS associated with PUSCH using the second parameter, the transmission unit 111 can transmit the PTRS associated with PUSCH. Here, the transmission unit 111 can transmit the PTRS associated with PUSCH in the target frequency resource to which TP information is applied. In addition, when the control unit 120 determines the MCS table using the second parameter, the transmission unit 111 can perform transmission on PUSCH according to the MCS table. Here, the transmission unit 111 can perform transmission on PUSCH according to the MCS table in the target frequency resource to which TP information is applied.

[0142] The transmitting unit 111 may transmit an uplink signal to which switching related to application of a transform precoder is applied to the base station 200 at a timing (predetermined timing) after a predetermined time has passed since the transform precoder information (eg, DCI including TP information) was received.

[0143] The control unit 120 may determine the predetermined timing based on the timing information. For example, the control unit 120 may determine a timing later than the normal uplink signal transmission timing (normal offset timing) (for example, a time slot after the predetermined time slot in which the normal uplink signal should be transmitted) as the predetermined timing. In addition, the control unit 120 may determine the predetermined timing based on the capability information.

[0144] In addition, the control unit 120 may restore whether the transform precoder is applied based on the information indicating the effective period of the TP information. That is, when the effective period of the TP information ends, the control unit 120 may restore the switching of the application of the transform precoder.

[0145] In addition, the control unit 120 may initiate (or trigger, execute) a random access process based on receiving a DCI or MAC CE including TP information. For example, the control unit 120 may initiate a contention-free random access (CFRA: Contention Free Random Access) process and / or a contention-based random access (CBRA: Contention Based Random Access) process based on receiving a DCI or MAC CE including TP information. For example, the control unit 120 may initiate a four-step CFRA process and / or a two-step CFRA process based on receiving a DCI or MAC CE including TP information. In addition, a four-step CBRA process and / or a two-step CBRA process may also be initiated based on receiving a DCI or MAC CE including TP information. As described above, the control unit 120 may initiate a CFRA process based on receiving a DCI format for a PDCCH command including TP information.

[0146] Here, the random access procedure may be performed in a higher layer (e.g., MAC layer) in the UE 100. That is, in the case of receiving DCI including TP information, a lower layer (e.g., physical layer) in the UE 100 may provide (or indicate) the TP information (or may be DCI including the TP information) to a higher layer (e.g., MAC layer). In addition, the higher layer (e.g., MAC layer) in the UE 100 may initiate a random access procedure based on the provision of the TP information from the physical layer.

[0147] The base station 200 may configure (or indicate) the resources of the random access preamble and the physical random access channel (PRACH) (e.g., resources in the frequency domain and / or resources in the time domain) used for the random access process. In the following, the resources of the physical random access channel are also recorded as PRACH occasions (occasion(s)). For example, the base station 200 may send an RRC message including information indicating a random access preamble and / or information indicating a PRACH occasion. For example, the base station 200 may send a random access configuration (e.g., RACH-ConfigDedicated), which includes information indicating a random access preamble and / or information indicating a PRACH occasion. In addition, as described above, a DCI format for a PDCCH command including information indicating a random access preamble may be sent. That is, the base station 200 may configure a random access preamble and / or a PRACH occasion for a random access process initiated based on the receipt of TP information.

[0148] UE 100 transmits a random access preamble (also referred to as message 1 or message A) based on the initiation of a random access procedure. In addition, UE 100 may perform transmission on PUSCH after the random access preamble is transmitted in a two-step RA process. Here, UE 100 may determine whether to apply a transform precoder to the transmission on PUSCH after the random access preamble is transmitted based on TP information. For example, UE 100 may apply a transform precoder to the transmission on PUSCH after the random access preamble is transmitted based on TP information. In addition, UE 100 may not apply a transform precoder to the transmission on PUSCH after the random access preamble is transmitted based on TP information. The base station 200 may configure timing information for the transmission on PUSCH after the random access preamble is transmitted. For example, the base station 200 may transmit an RRC message including timing information, and UE 100 may perform transmission on PUSCH after the random access preamble is transmitted based on the timing information. That is, UE 100 may determine the timing (eg, time slot, symbol and / or starting position) for transmission on PUSCH after the random access preamble is transmitted based on the timing information. For example, base station 200 may transmit a random access configuration (eg, RACH-ConfigDedicated) including the timing information.

[0149] In addition, UE 100 receives a random access response (RA response) (also referred to as message 2 or message B). For example, UE 100 may monitor DCI (which may be PDCCH) to which CRC encrypted with C-RNTI is added to receive a random access response (i.e., receive a random access response on PDSCH). Here, base station 200 may send an RRC message including information indicating a time window (also referred to as ra-ResponseWindow) in which a DC encrypted with C-RNTI is monitored and / or information indicating a search space set. Here, the search space set includes a USS set and / or a CSS set. That is, base station 200 may configure information indicating a time window and / or a search space set for a random access procedure initiated based on received TP information. For example, base station 200 may send an RRC message including information indicating a time window and / or information indicating a search space set, and UE 100 monitors DCI to which CRC encrypted with C-RNTI is added in the time window and / or in the search space set. The UE 100 may regard that the random access procedure is successfully completed based on receiving (or detecting) the DCI to which the CRC to which the C-RNTI is scrambled is added.

[0150] In addition, the UE 100 may apply the transform precoder according to the TP information based on the successful completion of the random access procedure. In addition, the UE 100 may not apply the transform precoder according to the TP information based on the successful completion of the random access procedure. That is, the UE 100 may send an uplink signal according to the TP information based on the successful completion of the random access procedure. Here, the base station 200 may configure timing information for the sending of the uplink signal based on the successful completion of the random access procedure. For example, the base station 200 may send an RRC message including timing information, and the UE 100 may send an uplink signal according to the TP information based on the timing information after the random access procedure is successfully completed. For example, the UE 100 may send an uplink signal according to the TP information after the random access procedure is successfully completed and at the time indicated by the timing information.

[0151] In addition, the UE 100 may perform transmission of an uplink signal according to the TP information after processing the timing advance command. For example, the UE 100 may perform transmission of an uplink signal according to the TP information after processing the timing advance command included in the random access response.

[0152] In addition, in the four-step CBRA process, the UE 100 may perform transmission on the PUSCH (or UL-SCH transmission) based on the random access response. For example, the UE 100 may perform transmission on the PUSCH (also referred to as message 3) based on the random access response grant (RA response grant) included in the random access response. For example, the UE 100 may apply the transform precoder to the transmission on the PUSCH based on the TP information. In addition, the UE 100 may not apply the transform precoder to the transmission on the PUSCH based on the TP information. The base station 200 may configure timing information for the transmission on the PUSCH. For example, the base station 200 may send an RRC message including timing information, and the UE 100 may perform transmission on the PUSCH based on the timing information. That is, the UE 100 may determine the timing (e.g., time slot, symbol and / or starting position) of the transmission on the PUSCH based on the timing information. For example, the base station 200 may send a random access configuration including timing information (e.g., RACH-ConfigDedicated). In addition, the base station 200 may include the timing information in a random access response and transmit it.

[0153] In addition, during the four-step CBRA process, the UE 100 may receive contention resolution (also referred to as message 4). For example, the UE 100 may regard the random access process as successfully completed based on contention resolution reception (or detection). As described above, the UE 100 may apply the transform precoder according to the TP information based on the successful completion of the random access process. In addition, the UE 100 may not apply the transform precoder according to the TP information based on the successful completion of the random access process. That is, the UE 100 may perform the transmission of an uplink signal based on the TP information based on the successful completion of the random access process. In addition, the base station 200 may configure timing information for the transmission of an uplink signal based on the successful completion of the random access process. For example, the base station 200 may send an RRC message including timing information, and the UE 100 may perform the transmission of an uplink signal based on the timing information after the random access process is successfully completed. For example, the UE 100 may perform the transmission of an uplink signal after the random access process is successfully completed and at the time timing indicated by the timing information.

[0154] As described above, the receiving unit 112 of the UE 100 receives the downlink control information (DCI) or the media access control unit (MAC CE) including the transform precoder information from the base station 200, and the transform precoder information indicates whether to apply the transform precoder. The control unit 120 of the UE 100 determines the target frequency resource as the target of the transform precoder information. The control unit 120 determines whether to apply the transform precoder to the transmission of the uplink signal in the target frequency resource based on the transform precoder information. As a result, the UE 100 can dynamically switch the waveform of the uplink signal and send it in the target frequency resource as the target of the transform precoder information. As a result, the UE 100 can dynamically switch the waveform of the uplink signal and send it in the target frequency resource as the target of the transform precoder information. The base station 200 can receive the uplink signal whose waveform is dynamically switched.

[0155] In addition, the control unit 120 determines all serving cells configured for the UE 100 or all uplink BWPs configured for the UE 100 as target frequency resources. Thus, since what is configured becomes the target of the TP information, the UE 100 can identify the target frequency resource in common between the base station 200 and the UE 100 even without the exchange of target designation information.

[0156] In addition, the receiving unit 112 may receive target designation information designating the target frequency resource from the base station 200. The control unit 120 may determine the target frequency resource based on the target designation information. Thus, the identifier of the target frequency resource can be shared between the base station 200 and the UE 100.

[0157] In addition, the target designation information may include information designating a serving cell as a target frequency resource. The control unit 120 may determine, as the target frequency resource, a designated serving cell among serving cells configured for the UE 100 based on the target designation information. Thus, even when a plurality of serving cells are configured for the UE 100, the serving cell that is the target of the TP information can be flexibly controlled.

[0158] In addition, the target designation information may include information designating a cell group as a target frequency resource. The control unit 120 may determine the designated cell group among the cell groups configured for the UE 100 as the target frequency resource based on the target designation information. Even when a plurality of cell groups are configured for the UE 100, the cell group that becomes the target of the TP information can be flexibly controlled.

[0159] In addition, the target designation information may include information designating the uplink BWP as the target frequency resource. The control unit 120 can determine the designated uplink BWP among the uplink BWPs configured for the UE 100 as the target frequency resource based on the target designation information. Even when a plurality of uplink BWPs are configured for the UE 100, the uplink BWP that becomes the target of the TP information can be flexibly controlled.

[0160] In addition, the receiving unit 112 may receive a radio resource control (RRC) message including the target designation information from the base station 200. Thus, since the RRC message can transmit a larger amount of information than the DCI and the MAC CE, it is easy to flexibly designate the target of the TP information.

[0161] In addition, the receiving unit 112 may receive a MAC CE including the target designation information from the base station 200. Thus, compared with RRC signaling, the target of the TP information can be switched dynamically.

[0162] In addition, the MAC CE may receive the MAC CE including the TP information and the target designation information from the base station 200. Thus, the UE 100 can immediately grasp the target of the TP information.

[0163] In addition, the DCI may be a DCI format including TP information. The control unit 120 may determine at least one of the serving cell and the uplink BWP scheduled using the DCI format as the target frequency resource. Thus, even if the target of the TP information is not explicitly specified, the UE 100 can grasp the target of the TP information.

[0164] In addition, the DCI may be a DCI format including TP information. The control unit 120 may determine the uplink component carrier corresponding to the downlink component carrier in which the DCI format is received, or the uplink BWP corresponding to the downlink BWP in which the DCI format is received as the target frequency resource. Thus, even if the target of the TP information is not explicitly specified, the UE 100 can grasp the target of the TP information.

[0165] In addition, the TP information may be first TP information. The receiving unit 112 may receive a radio resource control (RRC) message including second TP information from a base station, the second TP information indicating whether to apply a transform precoder. The control unit 120 may select TP information from the first TP information and the second TP information for determining whether to apply a transform precoder. Thus, the application of the transform precoder can be flexibly controlled using the first TP information and the second TP information.

[0166] In addition, in the case where the second TP information is included in at least one of configuration information for configuring a communication device-specific physical uplink shared channel (PUSCH) parameter that can be applied to a specific bandwidth part (BWP) and configuration information for configuring uplink transmission without dynamic permission, the control unit 120 can select the first TP information. That is, in the case of receiving a communication device-specific parameter including the second TP information (that is, in the case where the second TP information is configured as a communication device-specific parameter), the control unit 120 can determine whether to apply the transform precoder based on the first TP information. Regarding these configuration information, the base station 200 can use low-level signaling to switch whether to apply the transform precoder at appropriate timing. In addition, the base station 200 can perform efficient switching of the transform precoder specifically for the communication device.

[0167] In addition, when the second TP information is included in the configuration information related to the random access procedure, the control unit 120 can select the second TP information. That is, when a cell-specific parameter including the second TP information is received (that is, when the second TP information is configured as a cell-specific parameter), the control unit 120 can determine whether to apply the transform precoder based on the second TP information. As a result, the base station 200 can perform optimal switching of the transform precoder in consideration of the conditions of the entire cell.

[0168] In addition, receiving unit 112 may receive a radio resource control (RRC) message including information on a field in DCI including TP information from base station 200. Thus, UE 100 can understand whether TP information is included in DCI.

[0169] In addition, the receiving unit 112 can receive a radio resource control (RRC) message from the base station 200, the RRC message including configuration information for monitoring the DCI including the TP information. Thus, the UE 100 can grasp whether the TP information is included in the DCI. In addition, the UE 100 can control the control resource set (i.e., resources in the frequency domain) and / or the search space set (i.e., resources in the time domain) for monitoring the DCI including the TP information.

[0170] In addition, the receiving unit 112 may receive a MAC CE including TP information and a specific logical channel identifier for identifying the MAC CE including TP information from the base station 200. Thus, the UE 100 can understand whether the MAC CE includes TP information.

[0171] In addition, the receiving unit 112 receives downlink control information (DCI) or a media access control element (MAC CE) including transform precoder information from the base station 200, the transform precoder information indicating whether to apply the transform precoder. Regarding the parameters configured for the target of the transform precoder information, the control unit 120 determines which parameter to use, a first parameter used when the transform precoder is applied and a second parameter used when the transform precoder is not applied. Thus, regarding the parameters configured for the target of the transform precoder information included in the DCI or MAC CE, the UE 100 can switch the parameters related to the application of the transform precoder by determining it as one of the first parameter and the second parameter, and dynamic parameter switching becomes possible.

[0172] The receiving unit 112 may receive an RRC message, the RRC message including both the first parameter and the second parameter. Thus, after receiving the RRC message, the UE 100 can dynamically switch whether to apply the transform precoder using low-layer signaling.

[0173] The control unit 120 may suspend the parameter not used for the transmission of the uplink signal among the first parameter and the second parameter. Thus, since the parameter is suspended, the control unit 120 can use it without delay when the parameter not used for the transmission of the uplink signal is switched to be used for the transmission of the uplink signal.

[0174] (Other embodiments)

[0175] In the above embodiment, the uplink signal whose waveform is determined based on TPI is described by taking PUSCH as an example, but the present invention is not limited thereto. The same operation can be performed on other uplink signals (e.g., PTRS, etc.) and other signals (e.g., bypass signals, etc.).

[0176] In the above embodiment, as the mobile communication system 1, an NR-based mobile communication system is taken as an example for explanation. However, the mobile communication system 1 is not limited to this example. The mobile communication system 1 may be a TS system that complies with LTE (Long Term Evolution) or any other generation system (e.g., 6th generation) of the 3GPP standard. The base station 200 may be, for example, an eNB that provides an E-UTRA user plane and control plane protocol termination for the UE 100 in LTE. The mobile communication system 1 may also be a TS system that complies with a standard other than the 3GPP standard. The base station 200 may be an IAB (Integrated Access and Backhaul) host or an IAB node.

[0177] In the above embodiment, as the mobile communication system 1, an NR-based mobile communication system is used as an example for explanation. However, the mobile communication system 1 is not limited to this example. The mobile communication system 1 may be a TS system conforming to any other generation system (e.g., 6th generation) of the LTE or 3GPP standard. The base station 200 may be, for example, an eNB that provides an E-UTRA user plane and a control plane protocol termination for the UE 100 in LTE. The mobile communication system 1 may also be a TS system conforming to a standard other than the 3GPP standard.

[0178] The steps in the actions of the above-mentioned embodiments do not have to be performed in chronological order according to the order recorded in the flowchart or sequence diagram. For example, the steps in the action can be performed in an order different from the order recorded as a flowchart or sequence diagram, or can be performed in parallel. In addition, a part of the steps in the action can be deleted, and further steps can be added in the process. Furthermore, the above-mentioned action flows are not limited to the situation of being implemented separately and independently, and two or more action flows can also be combined to implement. For example, a part of the steps of an action flow can be added to other action flows, and a part of the steps of an action flow can also be replaced by a part of the steps of other action flows.

[0179] A program that enables a computer to execute each process performed by UE 100 or base station 200 may also be provided. The program may be recorded in a computer-readable medium. Using a computer-readable medium, the program can be installed in a computer. Here, the computer-readable medium on which the program is recorded may also be a non-transitory recording medium. The non-transitory recording medium is not particularly limited, but may be a recording medium such as a CD-ROM (Compact Disk Read Only Memory) or a DVD-ROM (Digital Versatile Disc Read Only Memory). In addition, the circuits that execute each process performed by UE 100 or base station 200 may be integrated, and at least a portion of UE 100 or base station 200 may be configured as a semiconductor integrated circuit (chip set, SoC (System On Chip)).

[0180] In the above-mentioned embodiment, "transmit" may refer to processing at least one layer in the protocol stack for transmission, or may refer to physically sending a signal wirelessly or by wire. Alternatively, "transmit" may also refer to a combination of processing at least one layer and physically sending a signal wirelessly or by wire. Similarly, "receive" may refer to processing at least one layer in the protocol stack for reception, or may refer to physically receiving a signal wirelessly or by wire. Alternatively, "receive" may also refer to a combination of processing at least one layer and physically receiving a signal wirelessly or by wire. Similarly, "obtain / acquire" may refer to obtaining information from stored information, or may refer to obtaining information from information received by other nodes, or may refer to obtaining the information by generating information. Similarly, unless otherwise explicitly stated, the statement "based on" or "depending on / in response to" does not mean "based only on" or "based only on". The statement "based on" refers to both "based only on" and "based at least in part on". Similarly, the record of "in response to" refers to both "only in response to" and "at least partially in response to". Similarly, "include" and "comprise" do not refer to only including the listed items, but refer to only including the listed items, or other items in addition to the listed items. Similarly, in the present disclosure, "or" does not refer to logical XOR, but to logical OR. Furthermore, any reference to elements using the "first", "second" and other titles used in the present disclosure does not generally limit the amount or order of these elements. These titles can be used as a convenient method to distinguish between more than two elements in the present disclosure. Therefore, the reference to the first element and the second element does not mean that only two elements can be adopted therein, or that the first element must precede the second element in some form. In the present disclosure, for example, in the case where articles such as a, an and the in English are added by translation, these articles can include multiple, unless the context clearly indicates that multiple are not included.

[0181] It is understood that although the present disclosure is described according to the embodiments, the present disclosure is not limited to the embodiments and configurations. The present disclosure also includes various modifications and variations within the equivalent scope. In addition, various combinations and methods, and other combinations and methods including only one element, more or less elements in them also fall within the scope and thought of the present disclosure.

[0182] (Note)

[0183] Features related to the above-mentioned embodiment are supplementally noted.

[0184] (Note 1)

[0185] A communication device, comprising:

[0186] Control Unit; and

[0187] a receiving unit, receiving downlink control information (DCI) or a media access control element (MAC CE) including transform precoder information from a base station, wherein the transform precoder information indicates whether to apply the transform precoder,

[0188] The control unit determines a target frequency resource as a target of the transformation precoder information.

[0189] The control unit determines whether to apply the transform precoder to transmission of the uplink signal in the target frequency resource based on the transform precoder information.

[0190] (Note 2)

[0191] According to the communication device described in Supplementary Note 1, the control unit determines all serving cells configured for the communication device or all uplink bandwidth parts (BWP) configured for the communication device as the target frequency resources.

[0192] (Note 3)

[0193] According to the communication device described in Supplementary Note 1, the receiving unit receives target designation information that designates the target frequency resource from the base station,

[0194] The control unit determines the target frequency resource based on the target designation information.

[0195] (Note 4)

[0196] According to the communication device described in Supplement 3, the target designation information includes information designating a serving cell as the target frequency resource.

[0197] The control unit determines, based on the target designation information, the designated serving cell among the serving cells configured for the communication device as the target frequency resource.

[0198] (Note 5)

[0199] According to the communication device described in Supplement 3 or 4, the target designation information includes information designating a cell group as the target frequency resource.

[0200] The control unit determines the designated cell group among the cell groups configured for the communication device as the target frequency resource based on the target designation information.

[0201] (Note 6)

[0202] The communication device according to any one of Supplementary Notes 3 to 5, wherein the target designation information includes information designating an uplink BWP as the target frequency resource.

[0203] The control unit determines, based on the target designation information, the designated uplink BWP among the uplink BWPs allocated to the communication device as the target frequency resource.

[0204] (Note 7)

[0205] According to any one of Supplementary Notes 3 to 6, the receiving unit receives a radio resource control (RRC) message including the target designation information from the base station.

[0206] (Note 8)

[0207] According to any one of Supplementary Notes 3 to 6, the receiving unit receives the MAC CE including the target designation information from the base station.

[0208] (Note 9)

[0209] According to the communication device described in Supplementary Note 8, the aforementioned MAC CE receives the aforementioned MAC CE including the aforementioned transform precoder information and the aforementioned target designation information from the aforementioned base station.

[0210] (Note 10)

[0211] According to the communication device described in Supplement 1, the aforementioned DCI is a DCI format including the aforementioned transform precoder information,

[0212] The control unit determines at least one of a serving cell and an uplink BWP scheduled using the DCI format as the target frequency resource.

[0213] (Note 11)

[0214] According to the communication device described in Supplement 1, the aforementioned DCI is a DCI format including the aforementioned transform precoder information,

[0215] The control unit determines, as the target frequency resource, an uplink component carrier corresponding to the downlink component carrier in which the DCI format is received, or an uplink BWP corresponding to the downlink BWP in which the DCI format is received.

[0216] (Note 12)

[0217] The communication device according to any one of Annexes 1 to 11, wherein the transform precoder information is first transform precoder information,

[0218] The receiving unit receives a radio resource control (RRC) message including second transform precoder information from the base station, wherein the second transform precoder information indicates whether to apply the transform precoder.

[0219] The control unit selects transform precoder information for determining whether to apply the transform precoder, from among the first transform precoder information and the second transform precoder information.

[0220] (Note 13)

[0221] According to the communication device described in Note 12, when the aforementioned second transform precoder information is included in at least any one of configuration information for configuring physical uplink shared channel (PUSCH) parameters dedicated to the communication device that can be applied to a specific bandwidth part (BWP), and configuration information for configuring uplink transmission without dynamic permission, the aforementioned control unit selects the aforementioned first transform precoder information.

[0222] (Note 14)

[0223] According to the communication device according to Supplement 12 or 13, when the second transform precoder information is included in the configuration information related to the random access procedure, the control unit selects the second transform precoder information.

[0224] (Note 15)

[0225] According to the communication device described in any one of Notes 1 to 6, the receiving unit receives a radio resource control (RRC) message from the base station, the RRC message includes information related to a field in the DCI, and the DCI includes the transform precoder information.

[0226] (Note 16)

[0227] According to the communication device described in any one of Notes 1 to 15, the receiving unit receives a radio resource control (RRC) message from the base station, the RRC message includes configuration information for monitoring the DCI, and the DCI includes the transform precoder information.

[0228] (Note 17)

[0229] According to the communication device described in any one of Notes 1 to 16, the aforementioned receiving unit receives the aforementioned MACCE from the aforementioned base station, the aforementioned MAC CE includes the aforementioned transform precoder information and a specific logical channel identifier, and the aforementioned specific logical channel identifier is used to identify the aforementioned MAC CE including the aforementioned transform precoder information.

[0230] (Note 18)

[0231] A base station, comprising:

[0232] a control unit that determines a target frequency resource that is a target of transform precoder information, the transform precoder information indicating whether to apply the transform precoder; and

[0233] The sending unit sends downlink control information (DCI) or media access control element (MAC CE) including the above-mentioned transform precoder information to the communication device.

[0234] (Note 19)

[0235] A communication method, performed by a communication device, comprising:

[0236] The step of receiving, from a base station, downlink control information (DCI) or a media access control element (MAC CE) including transform precoder information, wherein the transform precoder information indicates whether to apply the transform precoder;

[0237] a step of determining a target frequency resource as a target of the aforementioned transformation precoder information; and

[0238] A step of determining whether to apply the aforementioned transform precoder to the transmission of the uplink signal in the aforementioned target frequency resource based on the aforementioned transform precoder information.

Claims

1. A communication device (100), comprising: A control unit (120); as well as A receiving unit (112) receives downlink control information (DCI) or a media access control element (MAC CE) including transform precoder information from a base station (210), wherein the transform precoder information indicates whether to apply the transform precoder. The control unit determines a target frequency resource as a target of the transformation precoder information, The control unit determines whether to apply the transform precoder to transmission of an uplink signal in the target frequency resource based on the transform precoder information.

2. The communication device according to claim 1, wherein the control unit determines all serving cells configured for the communication device or all uplink bandwidth parts (BWP) configured for the communication device as the target frequency resources.

3. The communication device according to claim 1, wherein the receiving unit receives target designation information that designates the target frequency resource from the base station, The control unit determines the target frequency resource based on the target designation information.

4. The communication device according to claim 3, wherein the target designation information includes information designating a serving cell as the target frequency resource, The control unit determines, based on the target designation information, the designated serving cell among serving cells configured for the communication device as the target frequency resource.

5. The communication device according to claim 3, wherein the target designation information includes information designating a cell group as the target frequency resource, The control unit determines, based on the target designation information, the designated cell group among the cell groups allocated to the communication device as the target frequency resource.

6. The communication device according to claim 3, wherein the target designation information includes information designating an uplink BWP as the target frequency resource, The control unit determines, based on the target designation information, the designated uplink BWP among the uplink BWPs allocated to the communication device as the target frequency resource. 7 . The communication device according to claim 3 , wherein the receiving section receives a radio resource control (RRC) message including the target designation information from the base station. 8 . The communication device according to claim 3 , wherein the receiving unit receives the MAC CE including the target designation information from the base station. 9 . The communication device according to claim 8 , wherein the MAC CE receives the MAC CE including the transform precoder information and the target designation information from the base station.

10. The communication device according to claim 1, wherein the DCI is a DCI format including the transform precoder information. The control unit determines at least one of a serving cell and an uplink BWP scheduled using the DCI format as the target frequency resource.

11. The communication device according to claim 1, wherein the DCI is a DCI format including the transform precoder information. The control unit determines, as the target frequency resource, an uplink component carrier corresponding to the downlink component carrier in which the DCI format is received, or an uplink BWP corresponding to the downlink BWP in which the DCI format is received.

12. The communication device according to any one of claims 1 to 6, wherein the transform precoder information is first transform precoder information, The receiving unit receives a radio resource control (RRC) message including second transform precoder information from the base station, the second transform precoder information indicating whether to apply the transform precoder, The control unit selects transform precoder information for determining whether to apply the transform precoder, out of the first transform precoder information and the second transform precoder information.

13. According to the communication device according to claim 12, when the second transform precoder information includes at least any one of configuration information for configuring physical uplink shared channel (PUSCH) parameters dedicated to the communication device that can be applied to a specific bandwidth part (BWP), and configuration information for configuring uplink transmission without dynamic permission, the control unit selects the first transform precoder information. 14 . The communication device according to claim 12 , wherein when the second transform precoder information is included in configuration information related to a random access procedure, the control unit selects the second transform precoder information.

15. The communication device according to any one of claims 1 to 6, wherein the receiving unit receives a radio resource control (RRC) message from the base station, the RRC message including information on a field in the DCI including the transform precoder information. 16 . The communication device according to claim 1 , wherein the receiving unit receives a radio resource control (RRC) message from the base station, the RRC message including configuration information for monitoring the DCI including the transform precoder information.

17. According to the communication device according to any one of claims 1 to 6, the receiving unit receives the MAC CE from the base station, the MAC CE includes the transform precoder information and a specific logical channel identifier, and the specific logical channel identifier is used to identify the MAC CE including the transform precoder information.

18. A base station (210), comprising: A control unit (230) determines a target frequency resource as a target of transform precoder information, wherein the transform precoder information indicates whether to apply the transform precoder; as well as A sending unit (211) sends downlink control information (DCI) or a media access control element (MAC CE) including the transform precoder information to a communication device (100).

19. A communication method, performed by a communication device (100), the communication method comprising: The step of receiving downlink control information (DCI) or a media access control element (MAC CE) including transform precoder information from a base station (210), wherein the transform precoder information indicates whether to apply the transform precoder; A step of determining a target frequency resource as a target of said transforming precoder information; as well as A step of determining whether to apply the transform precoder to transmission of an uplink signal in the target frequency resource based on the transform precoder information.

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