terminal

Abstract

A terminal has a reception section that receives downlink control information from a network, and a control section that, in a case where a component carrier group composed of a plurality of component carriers is activated or applied, controls communication of the plurality of component carriers using the downlink control information received via any one of the plurality of component carriers.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a terminal that performs wireless communication, and particularly relates to a terminal that performs wireless communication using a plurality of component carriers. BACKGROUND

[0002] The 3rd Generation Partnership Project (3GPP) is standardizing the 5th generation mobile communication system (5G), also referred to as New Radio (NR) or Next Generation (NG), and is also standardizing the next generation, referred to as Beyond 5G, 5G Evolution, or 6G.

[0003] In Release 15 and Release 16 (NR) of 3GPP, operation of a band including a plurality of frequency ranges, specifically, FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz) is standardized.

[0004] In addition, research is also being conducted on supporting NR beyond 52.6 GHz to 71 GHz (Non-Patent Literature 1). Furthermore, Beyond 5G, 5G Evolution, or 6G (Release 18 and later) targets to also support a frequency band beyond 71 GHz.

[0005] PRIOR ART DOCUMENT

[0006] NON-PATENT LITERATURE

[0007] Non-Patent Literature 1: “New WID on Extending current NR operation to 71GHz”, RP-193229, 3GPP TSG RAN Meeting #86, 3GPP, December 2019 SUMMARY

[0008] As described above, if the frequency band that can be used is extended, the possibility of setting more component carriers (CCs) is expected to be higher.

[0009] In carrier aggregation (CA), the number of CCs that can be set is specified. For example, in Release 15 and Release 16 of 3GPP, the maximum number of CCs that can be set for a terminal (User Equipment: UE) is 16 in the downlink (DL) and the uplink (UL), respectively.

[0010] On the other hand, the setting of the physical layer and the medium access control layer (MAC) is performed per CC. For example, one downlink control information (DCI) is able to schedule only one CC, and thus, in order to schedule a plurality of CCs, a plurality of DCIs is required.

[0011] In particular, in the case of cross-carrier scheduling in which scheduling is applied across a plurality of CCs, the capacity of the PDCCH (Physical Downlink Control Channel) used in the transmission of the DCI can be strained.

[0012] Therefore, the following disclosure is made in view of such a situation, and aims to provide a terminal that is able to realize efficient communication control of CCs using downlink control information (DCI) even in the case where a plurality of component carriers (CCs) is set.

[0013] The gist of one embodiment of the present disclosure is a terminal including a reception section that receives downlink control information from a network, and a control section that, in the case where a component carrier group composed of a plurality of component carriers is activated or applied, controls communication of the plurality of component carriers using the downlink control information received via any one of the plurality of component carriers. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a whole schematic configuration diagram of the wireless communication system 10.

[0015] Figure 2 is a diagram showing the frequency range used in the wireless communication system 10.

[0016] Figure 3 is a diagram showing an example of the structure of a radio frame, a subframe, and a slot used in the wireless communication system 10.

[0017] Figure 4 is a functional block configuration diagram of the UE 200.

[0018] Figure 5 is a diagram for explaining a CC group.

[0019] Figure 6 is a diagram for explaining a CC group.

[0020] Figure 7 is a diagram for explaining a DCI.

[0021] Figure 8 is a diagram for explaining a scheduling example.

[0022] Figure 9 is a diagram for explaining a scheduling example.

[0023] Figure 10 is a diagram for explaining a scheduling example.

[0024] Figure 11 is a diagram for explaining a scheduling example.

[0025] Figure 12 is a diagram showing Action Example 1.

[0026] Figure 13 is a diagram showing Action Example 2.

[0027] Figure 14 is a diagram showing Action Example 3.

[0028] Figure 15 is a diagram showing Action Example 4.

[0029] Figure 16 is a diagram showing an example of a hardware structure of the UE 200. DETAILED DESCRIPTION

[0030] Hereinafter, embodiments will be described with reference to the drawings. In addition, the same or similar reference numerals are assigned to the same or similar functions and structures, and the description thereof will be appropriately omitted.

[0031] [Embodiment]

[0032] (1) Overall schematic structure of wireless communication system

[0033] Figure 1 is an overall schematic structure diagram of the wireless communication system 10 of the present embodiment. The wireless communication system 10 is a wireless communication system conforming to 5G New Radio (NR: New Radio), and includes a next-generation radio access network 20 (hereinafter, referred to as NG-RAN 20) and a terminal 200 (hereinafter, referred to as UE 200).

[0034] In addition, the wireless communication system 10 can also be a wireless communication system conforming to a method called Beyond 5G, 5G Evolution, or 6G.

[0035] The NG-RAN 20 includes a wireless base station 100A (hereinafter, referred to as gNB 100A) and a wireless base station 100B (hereinafter, referred to as gNB 100B). In addition, the specific structure of the wireless communication system 10 including the number of gNBs and UEs is not limited to the example shown in Figure 1

[0036] ​The NG-RAN 20 actually includes a plurality of NG-RAN nodes, specifically, gNBs (or ng-eNBs), connected with a 5G-compliant core network (5GC, not illustrated). In addition, the NG-RAN 20 and the 5GC can also be simply described as "networks".

[0037] The gNB 100 and the gNB 100B are 5G-compliant radio base stations that perform 5G-compliant wireless communication with the UE 200. The gNB 100, the gNB 100B, and the UE 200 can support massive MIMO (Multiple Input Multiple Output) that generates beams BM having higher directivity by controlling wireless signals transmitted from a plurality of antenna elements, carrier aggregation (CA) that bundles a plurality of component carriers (CCs), dual connectivity (DC) that simultaneously communicates with two NG-RAN nodes respectively, and the like.

[0038] In addition, the wireless communication system 10 supports a plurality of frequency ranges (FRs). Figure 2 The frequency ranges used in the wireless communication system 10 are shown.

[0039] As shown in Figure 2 The wireless communication system 10 supports FR1 and FR2. The frequency bands of each FR are described below.

[0040] • FR1: 410 MHz to 7.125 GHz

[0041] • FR2: 24.25 GHz to 52.6 GHz

[0042] In FR1, a subcarrier spacing (SCS) of 15, 30, or 60 kHz can be used, and a bandwidth (BW) of 5 to 100 MHz is used. The frequency of FR2 is higher than that of FR1, and an SCS of 60 or 120 kHz (240 kHz can also be included) can be used, and a bandwidth (BW) of 50 to 400 MHz is used.

[0043] In addition, the SCS can also be interpreted as numerology. Numerology is defined in 3GPP TS 38.300, and corresponds to one subcarrier spacing in the frequency domain.

[0044] Also, the wireless communication system 10 also supports a frequency band higher than the frequency band of FR2. Specifically, the wireless communication system 10 supports a frequency band of more than 52.6 GHz up to 114.25 GHz. For convenience, such a high frequency band can also be referred to as "FR2x".

[0045] To address this issue, when using a band domain exceeding 52.6 GHz, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) or Discrete Fourier Transform-Spread OFDM (DFT-S-OFDM) with larger sub-carrier spacing (SCS) can be applied.

[0046] Figure 3 An example of the structure of wireless frames, subframes, and time slots used in the wireless communication system 10 is shown.

[0047] like Figure 3 As shown, one time slot consists of 14 symbols. The larger (wider) the SCS, the shorter the symbol period (and time slot period). SCS is not limited to... Figure 3 The intervals (frequency) shown are as follows. For example, 480kHz, 960kHz, etc. can also be used.

[0048] Furthermore, the number of symbols constituting one time slot does not necessarily have to be 14 symbols (e.g., 28, 56 symbols). In addition, the number of time slots in each subframe can vary depending on the SCS.

[0049] in addition, Figure 3 The time direction (t) shown can also be referred to as the time domain, symbol period, or symbol time, etc. Furthermore, the frequency direction can also be referred to as the frequency domain, resource block, subcarrier, BWP (Bandwidth part), etc.

[0050] (2) Functional block structure of wireless communication system

[0051] Next, the functional block structure of the wireless communication system 10 will be described. Specifically, the functional block structure of the UE 200 will be described.

[0052] Figure 4 This is the function block structure diagram of UE 200. (Example) Figure 4 As shown, the UE 200 includes a wireless signal transceiver unit 210, an amplifier unit 220, a modem unit 230, a control signal / reference signal processing unit 240, an encoding / decoding unit 250, a data transceiver unit 260, and a control unit 270.

[0053] The radio transceiver unit 210 transmits and receives radio signals that comply with NR. The radio transceiver unit 210 supports Massive MIMO, CA that uses multiple CCs together, and DC that allows the UE to communicate simultaneously with two NG-RAN nodes.

[0054] In an embodiment, the wireless signal transceiver 210 constitutes a reception section that receives downlink control information (DCI) from the network (NG-RAN 20).

[0055] The amplification section 220 is constituted by a power amplifier (PA) / low noise amplifier (LNA), or the like. The amplification section 220 amplifies a signal output from the modulation / demodulation section 230 to a predetermined power level. In addition, the amplification section 220 amplifies an RF signal output from the wireless signal transceiver 210.

[0056] The modulation / demodulation section 230 performs data modulation / demodulation, transmission power setting, resource block allocation, and the like, for each predetermined communication target (gNB 100 or another gNB). In the modulation / demodulation section 230, cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) / discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) can also be applied. In addition, DFT-S-OFDM can be used not only for uplink (UL) but also for downlink (DL).

[0057] The control signal / reference signal processing section 240 performs processing related to various control signals transmitted and received by the UE 200, and processing related to various reference signals transmitted and received by the UE 200.

[0058] Specifically, the control signal / reference signal processing section 240 receives various control signals, such as a control signal of a radio resource control layer (RRC), transmitted from the gNB 100 via a predetermined control channel. In addition, the control signal / reference signal processing section 240 transmits various control signals to the gNB 100 via a predetermined control channel.

[0059] The control signal / reference signal processing section 240 performs processing using a reference signal (RS) such as a demodulation reference signal (DMRS) and a phase tracking reference signal (PTRS).

[0060] The DMRS is a terminal-specific base station and terminal-known reference signal (pilot signal) used to estimate a fading channel used in data demodulation. The PTRS is a terminal-specific reference signal for the purpose of estimating phase noise that becomes a problem in a high frequency band.

[0061] In addition, in the reference signal, in addition to the DMRS and the PTRS, a channel state information reference signal (CSI-RS: Channel State Information-Reference Signal), a sounding reference signal (SRS: Sounding Reference Signal), and a positioning reference signal (PRS: Positioning Reference Signal) for position information can be included.

[0062] Furthermore, the channel includes a control channel and a data channel. The control channel includes a PDCCH (Physical Downlink Control Channel), a PUCCH (Physical Uplink Control Channel), a RACH (Random Access Channel), a downlink control information (DCI: Downlink Control Information) including a random access radio network temporary identifier (RA-RNTI: Random Access Radio Network Temporary Identifier), and a PBCH (Physical Broadcast Channel), and the like.

[0063] Furthermore, the data channel includes a PDSCH (Physical Downlink Shared Channel) and a PUSCH (Physical Uplink Shared Channel), and the like. Data refers to data transmitted via the data channel. The data channel can also be replaced with a shared channel.

[0064] The encoding / decoding section 250 performs division / joining of data, channel encoding / decoding, and the like, for each predetermined communication target (the gNB 100 or another gNB).

[0065] Specifically, the encoding / decoding section 250 divides the data output from the data transceiver section 260 into a predetermined size, and performs channel encoding on the divided data. Furthermore, the encoding / decoding section 250 decodes the data output from the modulation / demodulation section 230, and joins the decoded data.

[0066] The data transceiving section 260 performs transmission and reception of protocol data units (PDUs) and service data units (SDUs). Specifically, the data transceiving section 260 performs assembly / disassembly of PDUs / SDUs and the like in a plurality of layers (medium access control layer (MAC), radio link control layer (RLC), and packet data convergence protocol layer (PDCP), and the like). Further, the data transceiving section 260 performs error correction and retransmission control of data in accordance with hybrid automatic repeat request (HARQ).

[0067] The control section 270 controls each functional block that constitutes the UE 200. In particular, in the present embodiment, when a component carrier group (hereinafter, referred to as CC group) constituted by a plurality of CCs is applied, the control section 270 controls communication of the plurality of CCs using the DCI received via any one of the plurality of CCs.

[0068] (3) CC group

[0069] Figure 5 And Figure 6 is a diagram for explaining the CC group of the present embodiment. As described above, the CC group contains a plurality of CCs.

[0070] As Figure 5 indicated, one CC group can be set. In Figure 5 , a case where CC#0 to CC#7 are set as CC group #0 is exemplified. CC group #0 can also be referred to as a serving cell group. CC group #0 can also be set by a higher layer parameter. For example, CC group #0 can also be set by an RRC message. In the case where one CC group is set, the plurality of CCs contained in the CC group can also be determined in advance.

[0071] As Figure 6 indicated, a plurality of CC groups can also be set. In Figure 6 , a case where CC#0 to CC#3 are set as CC group #0 and CC#4 to CC#7 are set as CC group #1 is exemplified. CC group #0 and CC group #1 can also be referred to as serving cell groups. CC group #0 and CC group #1 can also be set by a higher layer parameter. For example, CC group #0 and CC group #1 can also be set by an RRC message.

[0072] In Figure 5 and Figure 6In this case, the CC group can be applied to the UE 200 through an information element included in an RRC message, and can be applied to the UE 200 through an information element included in DCI. The CC group applied to the UE 200 can be a CC group selected from among CC groups set by a higher layer parameter. Application can also be referred to as enable or activate.

[0073] Likewise, the CC group can be not applied to the UE 200 through an information element included in an RRC message, and can be not applied to the UE 200 through an information element included in DCI. The CC group not applied to the UE 200 can also be a CC group selected from among CC groups set by a higher layer parameter. Not application can also be referred to as disable or inactivate.

[0074] First, the plurality of CCs included in the CC group can also be CCs that are continuous in a frequency band (intra-band). The plurality of CCs included in the CC group can be CCs included in a scheduling cell, and can be CCs included in a search space of a PDCCH. The search space of the PDCCH can be defined by an RNTI (Radio Network Temporary Identifier) such as an SI (System Information)-RNTI, an RA (Random Access)-RNTI, a TC (Temporary Cell)-RNTI, a C (Cell)-RNTI, a P (Paging)-RNTI, an INT (Interruption)-RNTI, an SFI (Slot Format Indication)-RNTI, a TPC (Transmit Power Control)-PUSCH-RNTI, a TPC-PUCCH-RNTI, a TPC-SRS-RNTI, an SP (Semi Persistent)-CSI (Channel State Information)-RNTI, etc. The plurality of CCs included in the CC group can also be CCs to which a configuration of a serving cell is commonly applied. The configuration of the serving cell can include a TDD DL / UL configuration, an SCS specific carrier list.

[0075] Second, one purpose or application setting and CC group can be set and applied. Two or more purposes or application settings and CC groups can also be set and applied. The predetermined purpose or application can include UL scheduling, DL scheduling, BWP switching, TCI (Transmission Configuration Indicator) switching, and SFI (Slot Format Indicator).

[0076] Regarding the case of setting and applying CC groups for one purpose or application, an example is shown. Figure 6 An explanation is given. For example, CC group #0 can be a group for UL scheduling, and CC group #1 can be a group for DL scheduling. CC group #0 can also be a group for scheduling (UL and DL), and CC group #1 can be a group for BWP switching. CC group #0 can also be a group for TCI switching, and CC group #1 can be a group for SFI. According to such a structure, CC groups can be flexibly set, and performance can be improved.

[0077] Regarding two or more purposes or applications, an example is shown. Figure 6 An explanation is given of the case of setting and applying CC groups. For example, CC group #0 can be a group for scheduling (UL and DL) and SFI, and CC group #1 can be a group for BWP switching and TCI switching. According to such a structure, the structure of gNB 100 can be simplified.

[0078] (4) DCI

[0079] Figure 7 is a diagram for explaining the DCI of the embodiment. In Figure 7 , a part of DCI format 1_0 is exemplified.

[0080] The DCI includes fields that store DCI formats, a carrier indicator (CI), a BWP indicator, a FDRA (Frequency Domain Resource Allocation), a TDRA (Time Domain Resource Allocation), a MCS (Modulation and Coding Scheme), and the like.

[0081] The value stored in the DCI format field is an information element that specifies the format of the DCI. The value stored in the CI field is an information element that specifies the CC to which the DCI is applied. The value stored in the BWP indicator field is an information element that specifies the BWP to which the DCI is applied. The BWP that can be specified by the BWP indicator is set by an information element (BandwidthPart-Config) included in the RRC message. The value stored in the FDRA field is an information element that specifies the frequency domain resource to which the DCI is applied. The frequency domain resource is determined by the value stored in the FDRA field and an information element (RA Type: RA Type) included in the RRC message. The value stored in the TDRA field is an information element that specifies the time domain resource to which the DCI is applied. The time domain resource is determined by the value stored in the TDRA field and an information element (pdsch-TimeDomainAllocationList) included in the RRC message. The time domain resource can be determined by the value stored in the TDRA field and a default table. The value stored in the MCS is an information element that specifies the MCS to which the DCI is applied. The MCS is determined by the value stored in the MCS and an MCS table. The MCS table can be specified by the RRC message or can be determined by RNTI scrambling.

[0082] (5) Application scenario

[0083] As described above, the CC group includes a plurality of CCs, and the communication of the plurality of CCs is controlled using the DCI received via any one of the plurality of CCs included in the CC group.

[0084] In this background, the UE 200 can also control the communication of the plurality of CCs by a combination of the higher layer parameter and the DCI, as follows.

[0085] First, the UE 200 can apply the same higher layer parameter to all CCs and specify the same resource to all CCs by the same information element included in the DCI received via one CC.

[0086] Second, the UE 200 can also apply different higher layer parameters to each CC and specify different resources to each CC by the same information element included in the DCI received via one CC.

[0087] Third, the UE 200 can also apply different higher layer parameters to each CC and specify different resources to each CC by different information elements included in the DCI received via one CC. In this case, the DCI received via one CC can also include a field for each CC.

[0088] The size of the field for each CC can also be the same. For example, in a case where the original field size is 3 bits and the number of CCs included in the CC group is 2, the size of the field included in the DCI is 6 bits (3 bits * 2). Alternatively, the size of the field for each CC can also be smaller than the original field size. For example, in a case where the original field size is 3 bits, the size of the field for each CC can also be 2 bits. In such a case, in a case where the number of CCs included in the CC group is 2, the size of the field included in the DCI is 4 bits (2 bits * 2).

[0089] The size of the field for each CC can also be different. For example, in a case where the original field size is 3 bits, CCs to which a field of 3 bits is applied and CCs to which a field of 2 bits is applied can also be mixed. In a case where a field of 3 bits is applied to CC#0 and CC#1 and a field of 2 bits is applied to CC#2 and CC#3, the size of the field included in the DCI is 10 bits (3 bits * 2 + 2 bits * 2).

[0090] Hereinafter, as the field included in the DCI, a TDRA field, an FDRA field, and an MCS field are exemplified.

[0091] (5.1) TDRA

[0092] First, a case where the TDRA field included in the DCI can take one value is described.

[0093] The same time-domain resource can also be allocated to all CCs included in the CC group. In such a case, the same pdsch-TimeDomainAllocationList or default table can be set in all CCs. For example, in a case where the DCI is received via CC#0, the pdsch-TimeDomainAllocationList or default table set for CC#0 can also be applied to all CCs. In such a case, even in a case where different pdsch-TimeDomainAllocationList or default tables are set for each CC, the pdsch-TimeDomainAllocationList or default table set for CC#0 can be applied to all CCs.

[0094] Alternatively, different time domain resources can be allocated to all CCs included in the CC group. In such a case, the same pdsch-TimeDomainAllocationList or default table can be set in all CCs. Here, the row of the pdsch-TimeDomainAllocationList or default table is replaced by a different value per CC. As the value different per CC, a CC index (CC Index) that identifies the CC can be used. Alternatively, a different pdsch-TimeDomainAllocationList or default table can be set for each CC included in the CC group. In such a case, the above replacement can not be performed.

[0095] Second, a case where the TDRA field included in the DCI can take two or more values is described. In such a case, the TDRA field includes an information element for specifying a TDRA per CC. For example, in a case where the number of CCs included in the CC group is four, the TDRA field includes four TDRA fields. That is, a TDRA field #0 for CC #0, a TDRA field #1 for CC #1, a TDRA field #3 for CC #3, and a TDRA field #4 for CC #4 can be included.

[0096] (5.2) FDRA

[0097] First, a case where the FDRA field included in the DCI can take one value is described. The same frequency domain resource can be allocated to all CCs included in the CC group. In such a case, the value of the FDRA field included in the DCI received via one CC is applied to all CCs. Alternatively, different frequency domain resources can be allocated to each CC included in the CC group. In such a case, different RA types are set for multiple CCs. For example, in a case where the DCI is received via CC #0, RA type 0 is set for CC #0, and RA type 1 is set for CC #2, the value of the FDRA field included in the DCI is applied to CC #0 and CC #1 via CC #0.

[0098] Second, a case where the FDRA field included in the DCI can take two or more values is described. In such a case, the FDRA field includes an information element for specifying an FDRA per CC. For example, in a case where the number of CCs included in the CC group is four, the FDRA field includes four FDRA fields. That is, a FDRA field #0 for CC #0, a FDRA field #1 for CC #1, a FDRA field #3 for CC #3, and a FDRA field #4 for CC #4 can be included.

[0099] Third, a new RA type can also be imported as the RA type. The new RA type is an RA type applied to all of the frequency domain resources included in the BWP.

[0100] For example, the RA type can also be set for multiple CCs as follows.

[0101] First, the same RA type can be set for all of the CCs included in the CC group. For example, in a case where DCI is received via CC#0, the RA type set for CC#0 can also be applied to all of the CCs. In such a case, even in a case where different RA types are set for each of the CCs, the RA type set for CC#0 can be applied to all of the CCs.

[0102] Second, different RA types can also be set for each of the CCs included in the CC group. For example, RA type 0 can be set for CC#0 and RA type 1 can be set for CC#1. In such a case, RA type 0 is applied to CC#0 and RA type 1 is applied to CC#1.

[0103] In addition, the RA type can also be specified by the MSB (Most Significant Bits) included in the FDRA field included in the DCI.

[0104] (5.3) MCS

[0105] First, a case where the MCS field included in the DCI can take one value is described.

[0106] The same MCS can be applied to all of the CCs included in the CC group. In such a case, the same MCS table can also be set for all of the CCs. For example, in a case where DCI is received via CC#0, the MCS table set for CC#0 can also be applied to all of the CCs. In such a case, even in a case where different MCS tables are set for each of the CCs, the MCS table set for CC#0 can be applied to all of the CCs.

[0107] Alternatively, different MCSs can also be applied to all of the CCs included in the CC group. In such a case, the same MCS table can also be set for all of the CCs. Here, the row of the MCS table is replaced by a different value for each of the CCs. As the value different for each of the CCs, a CC index that identifies the CC can also be used. Alternatively, different MCS tables can also be set for each of the CCs included in the CC group. In such a case, the above-described replacement can also not be performed.

[0108] Second, a case where the MCS field included in the DCI can take a value of 2 or more is described. In such a case, the MCS field includes an information element that specifies the MCS per CC. For example, in a case where the number of CCs included in the CC group is four, the MCS field includes four MCS fields. That is, an MCS field #0 for CC #0, an MCS field #1 for CC #1, an MCS field #3 for CC #3, and an MCS field #4 for CC #4 can be included.

[0109] (6) Scheduling example

[0110] Figures 8-11 is a diagram that illustrates a scheduling example of the embodiment. Here, a case where the CC group includes CC #0 to CC #3 and receives the DCI via CC #0 is illustrated. Here, a PDSCH is illustrated, but the present embodiment can also be applied to a PUSCH.

[0111] As illustrated in Figure 8 , the frequency resources and the time resources can be the same for the PDSCHs allocated in the respective CCs. As illustrated in Figure 9 , the frequency resources can be different and the time resources can be the same for the PDSCHs allocated in the respective CCs. As illustrated in Figure 10 , the frequency resources can be the same and the time resources can be different for the PDSCHs allocated in the respective CCs. As illustrated in Figure 11 , the frequency resources and the time resources can also be different for the PDSCHs allocated in the respective CCs.

[0112] As described above, Figures 8-10 , the scheduling example illustrated in can be realized by a combination of a higher layer parameter and the DCI.

[0113] (7) Action example

[0114] (7.1) Action example 1

[0115] As illustrated in Figure 12 , in step S10, the UE 100 receives, from the NG-RAN 20, an RRC message that includes an information element for specifying the CCs included in the CC group. The CC group can be one (see Figure 5 ) or two or more (see Figure 6 ).

[0116] In step S11, the UE 200 sets the CC group in accordance with the information element included in the RRC message received in step S10.

[0117] In step S12, the UE 200 receives, from the NG-RAN 20, an RRC message containing an information element indicating application of a CC group. The CC group to be applied to the UE 200 can be selected from the CC group set in step S10 or step S11. The information element indicating application of the CC group can also contain identification information of the CC group that should be applied to the UE 200 and a meaning (for example, enable) that the CC group should be applied.

[0118] In step S13, the UE 200 receives, from the NG-RAN 20, a DCI via any one of the plurality of CCs contained in the CC group.

[0119] In step S14, the UE 200 receives a PDSCH via the plurality of CCs contained in the CC group. Here, the UE 200 controls communication of the plurality of CCs in accordance with the DCI received in step S13. The control of communication can contain scheduling of resources used in the CCs, and can also contain determination of MCS applied to the CCs.

[0120] In Figure 12 , a case where a CC group is set by an RRC message is exemplified, but the CC group can also be determined in advance and known to the UE 200. In such a case, the above-described steps S10 and S11 can also be omitted.

[0121] In Figure 12 , only a case where a CC group is applied is exemplified. The CC group can also not be applied. In such a case, the UE 200 receives, from the NG-RAN 20 in step S12, an RRC message containing an information element indicating non-application of the CC group. The information element indicating non-application of the CC group can also contain identification information of the CC group that should not be applied to the UE 200 and a meaning (for example, disable) that the CC group should be applied.

[0122] (7.2) Action Example 2

[0123] As Figure 13 indicated in step S20, the UE 200 receives, from the NG-RAN 20, an RRC message containing an information element indicating application of a CC group. The information element indicating application of the CC group can also be an information element indicating whether or not each CC is contained in the CC group. For example, the information element indicating application of the CC group is bit map information capable of determining a CC in accordance with a bit position, and each bit indicates whether or not a CC corresponding to the bit position is contained in the CC group. The information element indicating application of the CC group can also be a combination of identification information of the CC and an information element indicating whether or not the CC is contained in the CC group.

[0124] In step S21, the UE 200 receives the DCI from the NG-RAN 20 via any one of the plurality of CCs included in the CC group.

[0125] In step S22, the UE 200 receives the PDSCH via the plurality of CCs included in the CC group. Here, the UE 200 controls the communication of the plurality of CCs in accordance with the DCI received in step S21. The control of the communication can include the scheduling of the resources used in the CCs, or can include the determination of the MCS applied to the CCs.

[0126] (7.3) Action Example 3

[0127] As shown in Figure 12 , in step S30, the UE 100 receives the RRC message including the information element for specifying the CCs included in the CC group from the NG-RAN 20. The CC group can be one (refer to Figure 5 ), or can be two or more (refer to Figure 6 ).

[0128] In step S31, the UE 200 sets the CC group in accordance with the information element included in the RRC message received in step S10.

[0129] In step S32, the UE 200 receives the DCI from the NG-RAN 20 via any one of the plurality of CCs included in the CC group. The UE 200 determines the CC group that should be applied to the UE 200 in accordance with the information element included in the DCI. For example, the UE 200 determines the CC group that should be applied to the UE 200 in accordance with the CI stored in the CI field included in the DCI.

[0130] For example, in the case shown in Figure 6 , in the case where the CI is a value indicating the CC#0, the CC group that should be applied to the UE 200 is the CC group#0 including the CC#0. On the other hand, in the case where the CI is a value indicating the CC#5, the CC group that should be applied to the UE 200 is the CC group#1 including the CC#0.

[0131] In step S33, the UE 200 receives the PDSCH via the plurality of CCs included in the CC group. Here, the UE 200 controls the communication of the plurality of CCs in accordance with the DCI received in step S32. The control of the communication can include the scheduling of the resources used in the CCs, or can include the determination of the MCS applied to the CCs.

[0132] In Figure 14In the above, a case where the CC group is set by the RRC message is exemplified, but the CC group can be determined in advance and be known to the UE 200. In such a case, the above-described steps S30 and S31 can also be omitted.

[0133] (7.4) Action Example 4

[0134] As Figure 15 shown in step S40, the UE 100 receives, from the NG-RAN 20, an RRC message containing an information element for specifying CCs included in a CC group. The CC group can be one (refer to Figure 5 ), or two or more (refer to Figure 6 ).

[0135] In step S41, the UE 200 sets the CC group in accordance with the information element contained in the RRC message received in step S40. Here, the UE 200 applies the CC group at the same time as the setting of the CC group. That is, a step for applying the CC group to the UE 200 (for example, step S12 and the like shown in Figure 12 ) is omitted.

[0136] In step S42, the UE 200 receives, from the NG-RAN 20, a DCI via any one of the plurality of CCs included in the CC group.

[0137] In step S43, the UE 200 receives a PDSCH via the plurality of CCs included in the CC group. Here, the UE 200 controls the communication of the plurality of CCs in accordance with the DCI received in step S42. The control of the communication can include scheduling of resources used in the CCs, or determination of an MCS applied to the CCs.

[0138] (8) Action / Effect

[0139] In the embodiment, the new concept of the plurality of CCs (CC group) controlled by the DCI received via one CC is introduced, and the UE 200 controls the CCs included in the CC group in accordance with the DCI received via one CC. According to such a structure, even in a case where a plurality of CCs is set, efficient communication control of the CCs using the DCI can be achieved.

[0140] [Other Embodiments]

[0141] The above describes the content of the present application along with the embodiments, but the present application is not limited to these descriptions, and various modifications and improvements can be made, as will be apparent to those skilled in the art.

[0142] In the above-described embodiments, the RRC message and the DCI are described as the center, but the embodiments are not limited thereto. For example, the UE 200 can apply the CC group in accordance with an information element used in a MAC CE (Control Element).

[0143] The block configuration diagram used in the description of the above-described embodiments Figure 4 ) indicates a module in units of functions. These functional blocks (configuration sections) are realized by any combination of at least one of hardware and software. Further, the method of realizing each functional block is not particularly limited. That is, each functional block can be realized using one device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, using wire, wireless, or the like) connected and realized using the plurality of devices. The functional blocks can also be realized in combination with software in the above-described one device or the above-described plurality of devices.

[0144] The functions include judging, deciding, determining, calculating, computing, processing, deriving, investigating, searching, confirming, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, considering, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but are not limited thereto. For example, a functional block (configuration section) that causes transmission to function is referred to as a transmitting unit or a transmitter. In any case, as described above, the method of realization is not particularly limited.

[0145] Further, the above-described UE 200 (the device) can also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 16 is a diagram illustrating an example of a hardware structure of the device. As Figure 16 indicated, the device can also be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0146] In addition, in the following description, the expression "device" can be replaced with "circuit", "equipment", "unit", or the like. The hardware structure of the device can be configured to include one or more of each device illustrated, or can be configured not to include a part of the device.

[0147] Each functional block of the apparatus (refer to Figure 4 ) is realized by any hardware element or a combination of hardware elements in the computer apparatus.

[0148] Further, each function in the apparatus is realized by reading a predetermined software (program) into a processor 1001, a memory 1002, and the like, and the processor 1001 performs an operation and controls at least one of communication of a communication apparatus 1004 or reading and writing of data in the memory 1002 and a storage 1003.

[0149] The processor 1001 controls the entire computer, for example, by causing an operating system to operate. The processor 1001 can also be constituted by a central processing device (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.

[0150] Further, the processor 1001 reads a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication apparatus 1004 to the memory 1002, and performs various processes based on the program. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments is used. Also, regarding the above-described various processes, although it is described that the above-described various processes are executed by one processor 1001, the above-described various processes can be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be mounted by one or more chips. In addition, the program can be transmitted from a network via a telecommunication line.

[0151] The memory 1002 is a computer-readable recording medium, and can be constituted by at least one of a read only memory (ROM: Read Only Memory), an erasable programmable read only memory (EPROM: Erasable Programmable ROM), an electrically erasable programmable read only memory (EEPROM: Electrically Erasable Programmable ROM), a random access memory (RAM: Random Access Memory), and the like. The memory 1002 can also be referred to as a register, a cache, a main storage (main storage device), and the like. The memory 1002 can hold a program (program code), a software module, and the like that can execute a method related to one embodiment of the present disclosure.

[0152] The memory 1003 is a computer-readable recording medium, and can be constituted by at least one of, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disc, a digital versatile disc, a Blu-ray (registered trademark) disc, a smart card, a flash memory (for example, a card, a stick, a Key drive), a Floppy (registered trademark) disk, a magnetic stripe, or the like. The memory 1003 can also be referred to as an auxiliary storage device. The above-described recording medium can be, for example, a database, a server, and other appropriate medium that includes at least one of the memory 1002 and the memory 1003.

[0153] The communication device 1004 is hardware (a transceiver device) for communication between computers via at least one of a wired network and a wireless network, and can also be referred to as a network device, a network controller, a network card, a communication module, or the like.

[0154] The communication device 1004 can also be constituted to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, or the like, for example, in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD).

[0155] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, or the like) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, or the like) that performs output to the outside. In addition, the input device 1005 and the output device 1006 can also be integrally constituted (for example, a touch panel).

[0156] Furthermore, the processor 1001 and each device such as the memory 1002 are connected by a bus 1007 for communication of information. The bus 1007 can be constituted using a single bus, or can be constituted using different buses for each device.

[0157] Furthermore, the device can be constituted to include a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an application specific integrated circuit (ASIC: Application Specific Integrated Circuit), a programmable logic device (PLD: Programmable Logic Device), a field programmable gate array (FPGA: Field Programmable Gate Array), or the like, and a part or all of each functional block can be implemented by the hardware. For example, the processor 1001 can also be implemented using at least one of these hardware.

[0158] Further, the notification of the information is not limited to the forms / embodiments explained in the present disclosure, and can be performed using other methods. For example, the notification of the information can be implemented by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Further, the RRC signaling can also be referred to as an RRC message, and for example, can be an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0159] The forms / embodiments explained in the present disclosure can also be applied to at least one of systems using LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, a 4th generation mobile communication system (4G), a 5th generation mobile communication system (5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other suitable systems, and next-generation systems extended therefrom. Further, a plurality of systems (e.g., at least one of LTE and LTE-A and 5G, etc.) can also be combined and applied.

[0160] For the processing steps, timing, flow, and the like of each form / embodiment described in the present disclosure, the order can be changed without contradiction. For example, for the method described in the present disclosure, the elements of various steps are prompted using the order of the examples, but are not limited to the specific order prompted.

[0161] In the present disclosure, certain actions by the base station are sometimes also performed by its upper node depending on the situation. In a network composed of one or more network nodes having a base station, it is obvious that various actions performed for communication with a terminal can be performed by at least one of the base station and other network nodes (for example, consider MME or S-GW, etc., but not limited to these) other than the base station. In the above, a case where the other network nodes than the base station are one is exemplified, but the other network nodes can also be a combination of a plurality of other network nodes (for example, MME and S-GW).

[0162] Information, signals (information, etc.) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). Input or output can also be performed via a plurality of network nodes.

[0163] The information input or output can be saved in a specific location (for example, a memory), and can be managed using a management table. The information input or output can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be transmitted to other devices.

[0164] The determination can be performed by a value (0 or 1) represented by 1 bit, by a Boolean value (true or false), or by comparison of numerical values (for example, comparison with a predetermined value).

[0165] Each form / embodiment described in the present disclosure can be used alone, in combination, or switched according to execution. In addition, the notification of predetermined information is not limited to being performed explicitly (for example, notification of "X"), but can also be performed implicitly (for example, without notification of the predetermined information).

[0166] For software, regardless of whether it is called software, firmware, middleware, microcode, hardware description language, or by another name, it should be broadly interpreted as referring to commands, command sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, procedures, functions, etc.

[0167] Also, software, commands, information, etc. can be transmitted via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using at least one of wired (e.g., coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or the like) and / or wireless (e.g., infrared, radio, and / or the like) technologies, then the at least one of the wired or wireless technologies is included within the definition of transmission medium.

[0168] The information, signals, and / or the like described in the disclosure can be represented using any of a variety of different technologies and techniques. For example, data, commands, instructions, information, signals, bits, symbols, chips, and the like described throughout the disclosure can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0169] Also, the terms described in the disclosure and terms needed for understanding the disclosure can be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol can also be a signal (signaling). Also, a signal can be a message. Also, a component carrier (CC) can be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

[0170] The terms "system" and "network" used in the disclosure can be used interchangeably.

[0171] Also, the information, parameters, and the like described in the disclosure can be represented using absolute values, relative values with respect to predetermined values, or the like, or using corresponding other information. For example, a radio resource can be indicated by an index.

[0172] The names used for the above-described parameters are non-limiting names in any respect. Also, the mathematical expressions and the like using the parameters are sometimes different from those explicitly disclosed in the disclosure. Various channels (e.g., PUCCH, PDCCH, and the like) and information elements can be identified by appropriate names, and thus various names allocated to the various channels and information elements are non-limiting in any respect.

[0173] In the present disclosure, the terms "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier", and the like can be used interchangeably. The base station is sometimes referred to by the terms macro cell, small cell, femto cell, pico cell, and the like.

[0174] A base station can accommodate one or more (for example, 3) cells (also referred to as sectors). In the case where a base station accommodates a plurality of cells, the coverage area of the base station as a whole can be divided into a plurality of smaller areas, and each of the smaller areas can also be provided with communication services by a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH)).

[0175] The term "cell" or "sector" refers to a part or the entirety of the coverage area of at least one of a base station and a base station subsystem that provides communication services within the coverage range.

[0176] In the present disclosure, the terms "mobile station (MS)", "user terminal", "user equipment (UE)", "terminal", and the like can be used interchangeably.

[0177] For a mobile station, the skilled person in the art also sometimes refers to it by the terms subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0178] At least one of the base station and the mobile station can also be referred to as a transmission device, a reception device, a communication device, or the like. In addition, at least one of the base station and the mobile station can be a device mounted on a mobile body, the mobile body itself, or the like. The mobile body can be a vehicle (for example, an automobile, an airplane, or the like), can be a mobile body that moves in an unmanned manner (for example, a drone, an autonomous vehicle, or the like), or can be a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing communication. For example, at least one of the base station and the mobile station can be an IoT (Internet of Things) device such as a sensor.

[0179] In addition, the base station in the present disclosure can also be replaced with a mobile station (user terminal, the same applies hereafter). For example, with respect to replacing the communication between the base station and the mobile station with the communication between a plurality of mobile stations (for example, a structure also referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), or the like), each form / embodiment of the present disclosure can also be applied. In this case, it can also be configured such that the mobile station has a function that the base station has. In addition, the expressions such as "uplink" and "downlink" can also be replaced with expressions corresponding to the inter-terminal communication (for example, "side"). For example, the uplink channel, the downlink channel, or the like can also be replaced with a side channel.

[0180] Likewise, the mobile station in the present disclosure can also be replaced with a base station. In this case, it can also be configured such that the base station has a function that the mobile station has.

[0181] A radio frame can be constituted by one or a plurality of frames in the time domain. One or a plurality of frames each in the time domain can be referred to as a subframe.

[0182] A subframe can also be constituted by one or a plurality of slots in the time domain. The subframe can be a fixed length of time (for example, 1 ms) that is independent of numerology.

[0183] Numerology can be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology can indicate at least one of, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, or the like.

[0184] A slot can be constituted of one or a plurality of symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, and the like ) A slot can be a time unit based on a numerology.

[0185] A slot can include a plurality of mini-slots. Each mini-slot can be constituted of one or a plurality of symbols in the time domain. Further, a mini-slot can also be referred to as a sub-slot. A mini-slot can be constituted of a smaller number of symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot can be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot can be referred to as PDSCH (or PUSCH) mapping type B.

[0186] A radio frame, a subframe, a slot, a mini-slot, and a symbol each represent a time unit in which a transmission signal is transmitted. A radio frame, a subframe, a slot, a mini-slot, and a symbol can each be referred to by another corresponding term.

[0187] For example, 1 subframe can be referred to as a transmission time interval (TTI), a plurality of consecutive subframes can also be referred to as a TTI, 1 slot or 1 mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in the existing LTE, can be a period shorter than 1 ms (for example, 1-13 symbols), or can be a period longer than 1 ms. In addition, a unit representing a TTI can not be referred to as a subframe, but can be referred to as a slot, a mini-slot, or the like.

[0188] Here, a TTI, for example, refers to a minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling in which a radio resource (a frequency bandwidth, a transmission power, and the like, which can be used in each user terminal) is allocated to each user terminal in units of a TTI. In addition, the definition of a TTI is not limited thereto.

[0189] A TTI can be a transmission time unit of a data packet (a transport block) after channel coding, a code block, a codeword, or the like, or can be a processing unit of scheduling, link adaptation, or the like. In addition, when a TTI is given, a time interval (for example, a number of symbols) in which a transport block, a code block, a codeword, or the like is actually mapped can be shorter than the TTI.

[0190] In addition, in a case where 1 slot or 1 mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) can constitute a minimum time unit of scheduling. Further, the number of slots (mini-slots) constituting the minimum time unit of scheduling can be controlled.

[0191] A TTI having a time length of 1 ms is also referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than the normal TTI can be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

[0192] In addition, for a long TTI (e.g., a normal TTI, a subframe, etc.), it can be understood as a TTI having a time length of more than 1 ms, and for a short TTI (e.g., a shortened TTI, etc.), it can be understood as a TTI having a TTI length less than that of a long TTI (long TTI) and a TTI length of 1 ms or more.

[0193] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, can include one or more contiguous subcarriers. The number of subcarriers included in the RB can be the same regardless of the numerology, for example, can be 12. The number of subcarriers included in the RB can also be determined according to the numerology.

[0194] In addition, the time domain of the RB can include one or more symbols, and can be the length of 1 slot, 1 mini-slot, 1 subframe, or 1 TTI. One TTI, one subframe, etc. can each be constituted by one or more resource blocks.

[0195] In addition, one or more RBs can also be referred to as a physical resource block (Physical RB: PRB), a subcarrier group (Sub-Carrier Group: SCG), a resource element group (Resource Element Group: REG), a PRB pair, an RB pair, etc.

[0196] In addition, a resource block can be constituted by one or more resource elements (Resource Element: RE). For example, 1 RE can be a wireless resource area of 1 subcarrier and 1 symbol.

[0197] A bandwidth part (BWP) (may also be referred to as a partial bandwidth, etc.) indicates a subset of contiguous common RBs (resource blocks) for a certain numerology in a certain carrier. Here, the common RBs can be determined by the index of the RBs with reference to a common reference point of the carrier. The PRB can be defined in a certain BWP and numbered within the BWP.

[0198] A BWP can include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs can be configured for a UE within one carrier.

[0199] At least one of the configured BWPs can be active, and a case in which the UE transmits / receives a predetermined signal / channel outside the active BWP can not be assumed. In addition, "cell", "carrier", etc. in the disclosure can be replaced with "BWP".

[0200] The structures of the radio frame, the subframe, the slot, the mini-slot, the symbol, etc. described above are merely examples. For example, the number of subframes included in the radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in the slot, the number of symbols and RBs included in the slot or mini-slot, the number of subcarriers included in the RB, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, etc. in the structure can be variously changed.

[0201] The terms "connected", "coupled" or all modifications thereof mean all direct or indirect connections or couplings between two or more elements, and can include the case where one or more intervening elements exist between the two elements "connected" or "coupled" to each other. The coupling or connection between elements can be a physical coupling or connection, a logical coupling or connection, or a combination thereof. For example, "connected" can be replaced with "accessed". In the disclosure, it can be considered that two elements are "connected" or "coupled" to each other using at least one of a wire, a cable, and a printed electric connection, and as some non-limiting and non-inclusive examples, electromagnetic energy having a wavelength in the radio frequency domain, the microwave region, and the light region (including both visible and non-visible) is used to "connect" or "couple" to each other.

[0202] The reference signal can be simply referred to as a Reference Signal (RS), and can be referred to as a pilot according to the applied standard.

[0203] The expression "according to" as used in the present disclosure is not intended to mean "only according to" unless specifically indicated otherwise. In other words, the expression "according to" means both "only according to" and "at least according to".

[0204] The "unit" in the structure of each of the above-described devices can also be replaced with "section", "circuit", "apparatus", or the like.

[0205] Any reference to elements using the designations "1st", "2nd", and the like used in the present disclosure does not necessarily limit the number or order of the elements. These designations can be used in the present disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to the 1st and 2nd elements does not mean that only two elements are employed there or that in some fashion the 1st element must precede the 2nd element.

[0206] When "include", "including", and variations thereof are used in the present disclosure, these terms are intended to be inclusive in a manner similar to the term "comprising". Also, the term "or" as used in the present disclosure is intended to mean an inclusive "or".

[0207] In the present disclosure, in the case where a definite article is added by translation, for example, as in English, a, an, and the, the present disclosure also includes the case where the noun following the definite article is plural.

[0208] The terms "determining" and "deciding" used in the present disclosure sometimes also include a variety of actions. For example, "determining" and "deciding" can include an action of judging, calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, etc. In addition, "determining" and "deciding" can include an action of receiving (e.g., receiving information), transmitting (e.g., transmitting information), inputting, outputting, accessing (e.g., accessing data in a memory), etc. Furthermore, "determining" and "deciding" can include an action of resolving, selecting, choosing, establishing, comparing, etc. That is, "determining" and "deciding" can include an action of considering an arbitrary action as "determining" and "deciding". In addition, "determining" and "deciding" can be replaced by "assuming", "expecting", "considering", etc.

[0209] In the present disclosure, the term "A and B are different" can also mean "A and B are mutually different". In addition, the term can also mean "A and B are different from C, respectively". The terms "separating", "combining", etc. can also be interpreted in the same manner as "different".

[0210] The present disclosure has been described in detail above, but it should be understood by those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as a modification and a change without departing from the spirit and scope of the present disclosure defined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate, and the present disclosure does not have any limiting meaning.

[0211] Label Explanation

[0212] 10: wireless communication system

[0213] 20: NG-RAN

[0214] 100: gNB

[0215] 200: UE

[0216] 210: Radio signal transceiver

[0217] 220: Amplification section

[0218] 230: Modem section

[0219] 240: Control signal / reference signal processing section

[0220] 250: Encoding / decoding section

[0221] 260: Data transceiver

[0222] 270: Control section

[0223] 1001: Processor

[0224] 1002: Memory

[0225] 1003: Storage

[0226] 1004: Communication device

[0227] 1005: Input device

[0228] 1006: Output device

[0229] 1007: Bus

Claims

1. A terminal having: The receiving unit receives one downlink control message from the network; and The control unit, when using a component carrier group consisting of multiple component carriers, controls the communication of the multiple component carriers by using a combination of higher-layer parameters and downlink control information received via any one of the multiple component carriers.

2. The terminal according to claim 1, wherein, The control unit applies the component carrier group based on the information elements contained in the RRC message received from the network.

3. The terminal according to claim 1 or 2, wherein, The control unit sets the component carrier group based on the information elements contained in the RRC message received from the network.

4. The terminal according to claim 1, wherein, The control unit applies the component carrier group based on the information elements contained in the downlink control information.

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