WO2021199347A1 - Terminal - Google Patents

Abstract

This terminal is assumed to perform division transmission in which a first region of a CORESET is transmitted over a first component carrier, and a second region of the CORESET is transmitted over a second component carrier.

Description

Terminal

The present disclosure relates to a terminal that executes wireless communication, particularly a terminal that executes wireless communication using a plurality of component carriers.

The 3rd Generation Partnership Project (3GPP) specifies the 5th generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG)), and next-generation specifications called Beyond 5G, 5G Evolution or 6G. We are also proceeding with the conversion.

Release 15 and Release 16 (NR) of 3GPP specify the operation of multiple frequency ranges, specifically, bands including FR1 (410MHz to 7.125GHz) and FR2 (24.25GHz to 52.6GHz). ..

In addition, studies are underway on NR that supports up to 71 GHz beyond 52.6 GHz (Non-Patent Document 1). In addition, Beyond 5G, 5G Evolution or 6G (Release-18 or later) aims to support frequency bands above 71GHz.

As mentioned above, it is expected that the possibility that more component carriers (CC) will be set will increase as the usable frequency band is expanded.

Carrier Aggregation (CA) stipulates the number of CCs that can be set. For example, in 3GPP Release 15 and Release 16, the maximum number of CCs that can be set for a terminal (User Equipment, UE) is 16 for downlink (DL) and uplink (UL), respectively.

On the other hand, the physical layer and medium access control layer (MAC) settings are executed for each CC.

Considering this situation, there is room for improvement in the setting of control resource sets (CORESET: control resource sets) used to transmit the downlink control channel (PDCCH: Physical Downlink Control Channel).

Therefore, the following disclosure is made in view of such a situation, and provides a terminal capable of assuming more efficient control resource set setting when a plurality of component carriers (CC) are set. With the goal.

One aspect of the present disclosure is a receiving unit (radio signal transmitting / receiving unit 210) that receives a control resource set including a first region and a second region from a network, and the first region is transmitted via a first component carrier. A terminal (UE200) including a control unit (control unit 270) that assumes divided transmission in which the second region is transmitted via the second component carrier.

One aspect of the present disclosure is a receiving unit (radio signal transmitting / receiving unit 210) that receives a downlink control channel from the network, and a transmitting unit that transmits the uplink data channel to the network based on the preparation time after receiving the downlink control channel. (Radio signal transmission / reception unit 210) and a control unit (control unit 270) that assumes a longer preparation time than in the case of a different frequency band different from the frequency band including one or more frequency ranges. It is a terminal (UE200) equipped with.

FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10. FIG. 2 is a diagram showing a frequency range used in the wireless communication system 10. FIG. 3 is a diagram showing a configuration example of a wireless frame, a subframe, and a slot used in the wireless communication system 10. FIG. 4 is a functional block configuration diagram of the UE 200. FIG. 5 is a diagram showing an example of a communication sequence relating to CORESET. FIG. 6 is a diagram showing an example of allocation of CORESET according to the operation example 1-1 to the frequency domain and the time domain. FIG. 7 is a diagram showing an example of allocation of CORESET to the frequency domain and the time domain according to the operation example 1-2. FIG. 8 is a diagram showing an example (No. 1) of allocation of CORESET to the frequency domain and the time domain according to the operation example 1-3. FIG. 9 is a diagram showing an example (No. 2) of allocation of CORESET to the frequency domain and the time domain according to the operation example 1-3. FIG. 10 is a diagram showing an example of the hardware configuration of the UE 200.

Hereinafter, embodiments will be described based on the drawings. The same functions and configurations are designated by the same or similar reference numerals, and the description thereof will be omitted as appropriate.

(1) Overall Schematic Configuration of Wireless Communication System FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10 according to the present embodiment. The wireless communication system 10 is a wireless communication system according to 5G New Radio (NR), and includes a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN20, and a terminal 200 (hereinafter, UE200)).

Note that the wireless communication system 10 may be a wireless communication system according to a method called Beyond 5G, 5G Evolution or 6G.

NG-RAN20 includes a radio base station 100A (hereinafter, gNB100A) and a radio base station 100B (hereinafter, gNB100B). The specific configuration of the wireless communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG.

The NG-RAN20 actually includes multiple NG-RANNodes, specifically gNB (or ng-eNB), and is connected to a core network (5GC, not shown) according to 5G. In addition, NG-RAN20 and 5GC may be simply expressed as "network".

GNB100A and gNB100B are radio base stations that comply with 5G, and execute wireless communication according to UE200 and 5G. The gNB100A, gNB100B and UE200 are Massive MIMO (Multiple-Input Multiple-Output) and multiple component carriers (CC) that generate more directional beam BM by controlling radio signals transmitted from multiple antenna elements. ) Can be bundled and used for carrier aggregation (CA), and dual connectivity (DC) for simultaneous communication between the UE and each of the two NG-RAN Nodes.

In addition, the wireless communication system 10 supports a plurality of frequency ranges (FR). FIG. 2 shows the frequency range used in the wireless communication system 10.

As shown in FIG. 2, the wireless communication system 10 corresponds to FR1 and FR2. The frequency bands of each FR are as follows.

・ FR1: 410 MHz to 7.125 GHz
・ FR2: 24.25 GHz to 52.6 GHz
In FR1, Sub-Carrier Spacing (SCS) of 15, 30 or 60kHz is used, and a bandwidth (BW) of 5 to 100MHz may be used. FR2 has a higher frequency than FR1, and SCS of 60 or 120kHz (240kHz may be included) is used, and a bandwidth (BW) of 50 to 400MHz may be used.

SCS may be interpreted as numerology. Numerology is defined in 3GPP TS38.300 and corresponds to one subcarrier spacing in the frequency domain.

Furthermore, the wireless communication system 10 also supports a higher frequency band than the FR2 frequency band. Specifically, the wireless communication system 10 supports a frequency band exceeding 52.6 GHz and up to 71 GHz. Such a high frequency band may be referred to as "FR2x" for convenience.

To solve this problem, when using a band exceeding 52.6 GHz, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform-Spread (DFT-) with a larger Sub-Carrier Spacing (SCS) S-OFDM) may be applied.

FIG. 3 shows a configuration example of a wireless frame, a subframe, and a slot used in the wireless communication system 10.

As shown in FIG. 3, one slot is composed of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). The SCS is not limited to the interval (frequency) shown in FIG. For example, 480kHz, 960kHz and the like may be used.

Further, the number of symbols constituting one slot does not necessarily have to be 14 symbols (for example, 28, 56 symbols). In addition, the number of slots per subframe may vary from SCS to SCS.

The time direction (t) shown in FIG. 3 may be referred to as a time domain, a symbol period, a symbol time, or the like. Further, the frequency direction may be referred to as a frequency domain, a resource block, a subcarrier, a bandwidth part (BWP), or the like.

BWP may be interpreted as a continuous set of PRBs (Physical Resource Blocks) selected from a continuous subset of common resource blocks for a given numerology on a given carrier.

The BWP information (bandwidth, frequency position, subcarrier spacing (SCS)) that the UE200 should use for wireless communication can be set in the UE200 using signaling from the upper layer (eg, the radio resource control layer (RRC)). A different BWP may be set for each UE200 (terminal). The BWP is an upper layer signaling or a lower layer, specifically, a physical layer (L1) signaling (downlink control information (DCI: Downlink Control) described later). Information)) may be changed by).

The wireless communication system 10 may support a large number of CCs for CA in order to achieve higher throughput. For example, if the maximum bandwidth of CCs is 400MHz, FR2x, specifically, up to 32 CCs can be placed in the frequency band of 57GHz to 71GHz. The maximum number of CCs to be set may exceed 32 or may be less than that.

In addition, DCI may include the following information.

(I) Uplink (UL) resource allocation (persistent or non-persistent)
(Ii) Description of downlink (DL) data transmitted to UE200 DCI schedules downlink data channel (eg PDSCH (Physical Downlink Shared Channel)) or uplink data channel (eg PUSCH (Physical Uplink Shared Channel)). It can also be a set of information that can be done. Such a DCI may be specifically referred to as a scheduling DCI.

DCI can be transmitted via the downlink control channel, specifically, PDCCH (Physical Downlink Control Channel). In addition, the DL radio resources used for PDCCH transmission can be specified by control resource sets (CORESET). That is, CORESET may be interpreted as a set of physical resources (specifically, a specific region on the DL resource grid) and parameters used to transmit PDCCH (including DCI).

UE200 can assume the specific area to which CORESET is assigned based on the search space, specifically the timing and period pointed out by the common search space (CSS).

In addition, CORESET may include the following parameters.

-Resource element (RE): The smallest unit of the resource grid consisting of one subcarrier in the frequency domain and one OFDM symbol in the time domain-Resource element group (REG): One resource block (12 resource elements in the frequency domain) ) And one OFDM symbol in the time domain-REG bundle: Consists of multiple REGs. The bundle size can be specified by the parameter'L', which can be determined by the Radio Resource Control Layer (RRC) parameter (reg-bundle-size).

・ Control channel element (CCE): Consists of multiple REGs. The number of REGs (REG bundles) included in the CCE may be variable.

・ Aggregation Level (AL): Indicates the number of CCEs assigned to PDCCH. In 3GPP Release-15, 16, 1, 2, 4, 8, 16 are specified, but in the wireless communication system 10, a larger value may be used as described later.

In addition, 3GPP Release-15, 16 defines the PUSCH preparation time, which indicates the timeline between the PDCCH including the scheduling DCI and the PUSCH scheduled by the scheduling DCI. In the wireless communication system 10, as will be described later, a larger value may be used as the preparation time.

(2) Functional block configuration of the wireless communication system Next, the functional block configuration of the wireless communication system 10 will be described. Specifically, the functional block configuration of UE200 will be described.

FIG. 4 is a functional block configuration diagram of the UE 200. As shown in FIG. 4, the UE 200 includes a radio signal transmission / reception unit 210, an amplifier unit 220, a modulation / demodulation unit 230, a control signal / reference signal processing unit 240, a coding / decoding unit 250, a data transmission / reception unit 260, and a control unit 270. ..

The wireless signal transmitter / receiver 210 transmits / receives a wireless signal according to NR. The radio signal transmitter / receiver 210 corresponds to Massive MIMO, a CA that bundles a plurality of CCs, and a DC that simultaneously communicates between the UE and each of the two NG-RAN Nodes.

In the present embodiment, the radio signal transmission / reception unit 210 receives the downlink control channel from the network (gNB100A or gNB100B, the same applies hereinafter). In the present embodiment, the wireless signal transmission / reception unit 210 constitutes a reception unit.

Specifically, the wireless signal transmitter / receiver 210 receives the PDCCH. The PDCCH may be transmitted across a plurality of CCs, as will be described later.

PDCCH is transmitted in the control resource set (CORESET) as described above. In the present embodiment, CORESET may also be transmitted across a plurality of CCs, that is, divided into a plurality of CCs.

Specifically, CORESET may be divided into at least two regions, specifically, a first region and a second region.

That is, the wireless signal transmission / reception unit 210 can receive CORESET including the first region and the second region from the network. CORESET may be divided into three or more regions and transmitted in two or more CCs.

In addition, the wireless signal transmitter / receiver 210 receives the downlink data channel from the network. Specifically, the radio signal transmission / reception unit 210 receives the PDSCH.

Furthermore, the wireless signal transmitter / receiver 210 transmits an uplink data channel to the network. Specifically, the radio signal transmission / reception unit 210 transmits the PUSCH. In the present embodiment, the wireless signal transmission / reception unit 210 constitutes a transmission unit.

In particular, after receiving the PDCCH, the wireless signal transmitter / receiver 210 can transmit the PUSCH based on the PUSCH preparation time indicating the timeline between the PDCCH and the PUSCH.

Specifically, the radio signal transmission / reception unit 210 can transmit the PUSCH within a time corresponding to the number of symbols specified by the PUSCH preparation time according to the control by the control unit 270.

The amplifier unit 220 is composed of PA (Power Amplifier) / LNA (Low Noise Amplifier) and the like. The amplifier unit 220 amplifies the signal output from the modulation / demodulation unit 230 to a predetermined power level. Further, the amplifier unit 220 amplifies the RF signal output from the radio signal transmission / reception unit 210.

The modulation / demodulation unit 230 executes data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (gNB100A, etc.). Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform-Spread (DFT-S-OFDM) may be applied to the modulation / demodulation unit 230. Further, DFT-S-OFDM may be used not only for uplink (UL) but also for downlink (DL).

The control signal / reference signal processing unit 240 executes processing related to various control signals transmitted / received by the UE 200 and processing related to various reference signals transmitted / received by the UE 200.

Specifically, the control signal / reference signal processing unit 240 receives various control signals transmitted from the gNB 100A via a predetermined control channel, for example, control signals of the radio resource control layer (RRC). Further, the control signal / reference signal processing unit 240 transmits various control signals to the gNB100A via a predetermined control channel.

The control signal / reference signal processing unit 240 executes processing using a reference signal (RS) such as Demodulation Reference Signal (DMRS) and Phase Tracking Reference Signal (PTRS).

DMRS is a known reference signal (pilot signal) between the base station and the terminal of each terminal for estimating the fading channel used for data demodulation. PTRS is a terminal-specific reference signal for the purpose of estimating phase noise, which is a problem in high frequency bands.

In addition to DMRS and PTRS, the reference signal may include ChannelStateInformation-ReferenceSignal (CSI-RS), SoundingReferenceSignal (SRS), PositioningReferenceSignal (PRS) for position information, and the like. ..

In addition, the channel includes a control channel and a data channel. Control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), RACH (Random Access Channel, Random Access Radio Network Temporary Identifier (RA-RNTI), Downlink Control Information (DCI)), and Physical. Broadcast Channel (PBCH) etc. are included.

Data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel). Data means data transmitted over a data channel. The data channel may be read as a shared channel.

The coding / decoding unit 250 executes data division / concatenation and channel coding / decoding for each predetermined communication destination (gNB100A, etc.).

Specifically, the coding / decoding unit 250 divides the data output from the data transmitting / receiving unit 260 into a predetermined size, and executes channel coding for the divided data. Further, the coding / decoding unit 250 decodes the data output from the modulation / demodulation unit 230 and concatenates the decoded data.

The data transmission / reception unit 260 executes transmission / reception of Protocol Data Unit (PDU) and Service Data Unit (SDU). Specifically, the data transmitter / receiver 260 is a PDU / SDU in a plurality of layers (such as a medium access control layer (MAC), a wireless link control layer (RLC), and a packet data convergence protocol layer (PDCP)). Assemble / disassemble. Further, the data transmission / reception unit 260 executes data error correction and retransmission control based on the hybrid ARQ (Hybrid automatic repeat request).

The control unit 270 controls each functional block constituting the UE 200. In particular, in the present embodiment, the control unit 270 executes control regarding the downlink control channel (PDCCH).

Specifically, the control unit 270 executes control regarding the control resource set (CORESET) to which the PDCCH is transmitted.

As described above, in the present embodiment, the CORESET can be transmitted across a plurality of CCs and may be divided into at least two regions, specifically, a first region and a second region. .. In the control unit 270, the first region is transmitted via the first component carrier (for example, CC # 0, see FIG. 6 and the like), and the second region is transmitted via the second component carrier (for example, CC # 1). It may be assumed that it will be performed (hereinafter referred to as divided transmission).

As described above, CORESET may be divided into three or more regions and transmitted in two or more (that is, three or more) CCs. Further, the CC to which CORESET is divided and transmitted may basically be assumed to be continuous, but may be non-contiguous.

Further, the control unit 270 can also assume that the first region and the second region of CORESET are divided into a plurality of CCs and transmitted, and are further assigned to different positions in the time domain. For example, the first region may be set to CC # 0, the second region may be set to CC # 1, and the time domain, that is, a different symbol (OFDM symbol) may be assigned. The first region and the second region may be continuous or discontinuous in the time domain (symbol).

Further, the control unit 270 may assume that the aggregation level (AL) of the control channel element (CCE) constituting the CORESET is higher in the case of the divided transmission of CORESET than in the case of the divided transmission of CORESET.

In 3GPP Release-15, 16, AL of 1, 2, 4, 8, 16 can be set, but a larger value, for example, AL of 32, 64, etc. may be set.

Further, the control unit 270 may assume that the number of resource element groups (REGs) included in the CCE (which may be the number of REG bundles) is larger in the case of CORESET split transmission than in the case where CORESET is not split transmission. good.

In 3GPP Release-15,16, the CCE can contain up to 6 REG bundles, but may include a larger number, eg 12 REG bundles. Also, when high frequency bands such as FR2x are used, the CCE may contain a larger number of REGs or may contain a larger number of REGs as the size of the BWP increases.

As described above, the control unit 270 may assume that the CORESET is divided and transmitted. In this case, the control unit 270 sets the parameters of the upper layer regarding CORESET or the common search space (CSS) to the divided transmission. It may be assumed that it applies to multiple groups of CCs used in.

Specifically, in 3GPP Release-15, 16, CORESET and CSS can be set for each DLBWP, but in this embodiment, they are set for each group of a plurality of CCs used for divided transmission of CORESET. You can.

Note that the parameters of the upper layer (RRC, etc.) related to CORESET and CSS may be set not for each CC specified in 3GPP Release-15, 16 but for each group of the plurality of CCs.

In the present embodiment, the control unit 270 is in the case of a high frequency band such as FR2x, that is, a different frequency band different from the frequency band including one or more frequency ranges (FR1, FR2), than in the case of the frequency band. A long PUSCH preparation time may be assumed.

Specifically, in the high frequency band, the control unit 270 may set the PUSCH preparation time applied to the PUSCH scheduled by the scheduling DCI longer than in the case of FR1 and FR2.

Further, when the subcarrier interval (SCS) used for PUSCH transmission is larger than that in the frequency band including FR1 and FR2, the control unit 270 assumes a PUSCH preparation time longer than that in the frequency band. May be good. For example, in the case of a large SCS such as 240 kHz, the control unit 270 may lengthen the PUSCH preparation time. A specific setting example of PUSCH preparation time will be described later.

Further, the control unit 270 may assume a PDSCH decoding time longer in the case of the different frequency band than in the case of the frequency band including FR1 and FR2.

The PUSCH preparation time (PUSCH preparation time N ₂ ) and the PDSCH decoding time (PDSCH decoding time N ₁ ) are specified in 3GPP TS38.214.

(3) Operation of the wireless communication system Next, the operation of the wireless communication system 10 will be described. Specifically, the operation related to the resource setting of the downlink control channel (PDCCH) using a plurality of component carriers (CC) will be described.

(3.1) As described above, the prerequisite wireless communication system 10 supports the frequency band (FR2x) exceeding 52.6 GHz and up to 71 GHz. High frequency bands such as FR2x are essentially different from FR1 and FR2 in the following respects.

(Channel / radio wave propagation)
-Expansion of usable bandwidth (approx. 13 GHz (for 57 to 71 GHz unlicensed))
・ Low delay spread due to large path loss due to non-line of sight (NLOS) (device (terminal))
・ Small size antenna element according to wavelength (large-scale (massive) antenna)
・ High directivity based on analog beamforming (narrow beam width)
・ Decrease in power amplifier efficiency (increase in peak-to-average power ratio (PAPR))
• Increased phase noise (higher SCS and shorter symbol time applicability)
Also, the wider the available bandwidth, the more CC is likely to be configured unless a very large CC bandwidth is supported. As mentioned above, when the maximum bandwidth of CCs is 400MHz like FR2, up to 32 CCs can be arranged in the frequency band of 57GHz to 71GHz.

In carrier aggregation (CA), there is a limit to the number of CCs that can be set. Specifically, in 3GPP Release-15 and 16, the maximum number of CCs that can be set for UE200 is 16 for DL and UL, respectively (Chapter 5.4.1 of 3GPP 38.300).

On the other hand, the physical layer (L1, PHY) and medium access control layer (MAC) settings are executed for each CC. In 3GPP Release-15,16, one DCI can schedule only one CC, so a large number of DCIs are required to schedule a large number of CCs. Therefore, the capacity of PDCCH may be tight.

Also, one transport block (TB) can only be transmitted by one CC (that is, one TB cannot be mapped to multiple CCs), and many CCs have many Hybrid Automatic repeat requests. (HARQ) Acknowledgement (ACK) bit is required.

Furthermore, beam management (Transmission Configuration Indication (TCI) status display) is also executed for each CC. Specifically, in 3GPP Release-16, one MAC-CE can update / activate the TCI status of multiple CCs, but one DCI can update only the TCI status of one CC.

Despite these restrictions, it is assumed that the channel characteristics of multiple CCs within a single broadband are not so different, so it is not always necessary and efficient to operate in individual PHY and MAC layers for each CC. It is assumed that it is not.

In the following, while considering such a premise, the operation related to more efficient CORESET setting when multiple component carriers (CC) are set will be described. Specifically, an operation that can realize highly flexible PDCCH scheduling via a plurality of CCs (for example, transmission of one transport block (TB) via a plurality of CCs) will be described.

(3.2) Outline of operation The following operation example will be described as an operation for realizing highly flexible PDCCH scheduling via a plurality of CCs.

-(Operation example 1): CORESET setting for resource allocation such as PDCCH- (Operation example 2): New CORESET configuration Improvement of aggregation level (AL) of control channel element (CCE), and between CCE and REG bundle Coarsing the particle size may be included.

-(Operation example 3): Mutual cooperation between CORESET and search space- (Operation example 4): Change of PUSCH preparation time (and PDSCH decoding time) FIG. 5 shows an example of a communication sequence related to CORESET. Here, it is assumed that UE200 has set up multiple CCs to execute CA.

As shown in FIG. 5, the network transmits PDCCH (CORESET) toward UE200 (S10). Specifically, if it is determined that a CORESET for Type0-PDCCH CSS (Common Search Space) set exists, the UE200 may be called the CORESET (Remaining Minimum System Information (RMSI) CORESET). Determine some contiguous resource blocks (RBs) and symbols for. Based on the determined RB and symbol, UE200 provides a monitoring opportunity (MO) for the downlink control channel (PDCCH: Physical Downlink Control Channel), specifically, Type 0 PDCCH for system information block (SIB) decoding. Set.

UE200 then sets the required data channels, specifically PUSCH and PDSCH (S20).

UE200 executes a random access (RA) procedure, etc., using the set channel, etc., and establishes a connection with the network (S30).

(3.3) Operation example 1
This operation example relates to CORESET resource allocation. Specifically, in this operation example, CORESET may be set across a plurality of CCs.

(3.3.1) Operation example 1-1
FIG. 6 shows an example of allocation of CORESET according to the operation example 1-1 to the frequency domain and the time domain. As shown in FIG. 6, CORESET may be set across a plurality of CCs (CC # 0 and CC # 1), that is, may be transmitted in a divided manner. The number of CCs set across one CORESET is not limited to 2, and may be 3 or more. Further, the CC may be continuous or non-contiguous in the frequency domain.

Furthermore, as shown in FIG. 6, the following allocation options can be applied.

(Option 1): CORESET is assigned as multiple CCs only in the frequency domain.

In the case of 3GPP Release-15 etc., CORESET is assigned in one CC (frequency domain), but in the case of option 1, CORESET is assigned to CC # 0 and CC # in the same time domain (symbol or slot). It is assigned to 1 more than once. As described above, the CORESET area assigned to CC # 0 may be referred to as a first area, and the CORESET area assigned to CC # 1 may be referred to as a second area.

In this case, the parameter related to CORESET in the RRC layer, specifically, the bit size of frequencyDomainResources may be the number of a plurality of CCs included in the group for divided transmission of CORESET × 45.

(Option 2): CORESET is duplicated in multiple CCs only in the time domain.

As shown in FIG. 6, CORESET is duplicated in CC # 0 and CC # 1, but is not duplicated in CC # 0 and CC # 1 in the same time domain. That is, CORESET can be duplicated in CC # 0 and CC # 1 only in the time domain.

Option 2 is not appropriate when frequency division multiplexing (FDM) is not used.

In this case, the parameter related to CORESET in the RRC layer, specifically, duration takes the value of 1..maxCoReSetDuration when applied for each grouped CC, and maxCoReSetDurationForGroup is the number of CORESET period (CORESETduration). It may be the maximum value of. Alternatively, the duration may indicate the value of 1..maxCoReSetDuration for each CC.

(Option 3): CORESET is assigned as multiple CCs in both the frequency domain and the time domain.

As shown in FIG. 6, CORESET is duplicated in CC # 0 and CC # 1 in the same time domain, and is duplicated in CC # 0 and CC # 1 in the same time domain. Be done.

Further, in this case, as in option 1, the bit size of frequencyDomainResources may be the number of multiple CCs included in the group for split transmission of CORESET × 45, and the duration is 1..maxCoReSetDurationForGroup, that is, the CC. It may be set for the including group.

(3.3.2) Operation example 1-2
FIG. 7 shows an example of allocating CORESET to the frequency domain and the time domain according to the operation example 1-2. As shown in FIG. 7, when CORESET is allocated to a plurality of CCs in duplicate, the UE 200 may assume the following levels of overlap.

・ (Alt. 1): RE level ・ (Alt. 2): REG level ・ (Alt. 3): REG bundle level (suitable for interleave mapping)
・ (Alt. 4): CCE level (suitable for PDCCH monitoring)
Further, as shown in FIG. 7, the flexibility of CORESET (RE) allocation is highest in Alt.1. On the other hand, Alt. 4 has the highest degree of simplicity of CORESET (RE) allocation.

(3.3.3) Operation example 1-3
FIG. 8 shows an example (No. 1) of allocation of CORESET to the frequency domain and the time domain according to the operation example 1-3. As shown in FIG. 8, when CORESET is allocated to a plurality of CCs in duplicate, UE200 may assume the allocation of the REG bundle as follows.

(Alt. 1): The REG bundles that make up CORESET are interleaved (discontinuously assigned to the frequency domain) between CC # 0 and CC # 1. In FIG. 8, REG bundle # 1 and REG bundle # 2 are interleaved.

In this case, the following operations may be further executed.

(Alt. 1-1): Notifies UE200 of the validity or invalidity of interleaving using the RRC parameter common to all CCs.

-(Alt. 1-2): Use a separate RRC parameter for each CC to notify UE200 that interleaving is enabled if any or all of those parameters are set to "interleave". ..

・ (Alt. 2): The REG bundle that makes up CORESET cannot be interleaved between CC # 0 and CC # 1.

In this case, only mappings localized to UE200 (continuous allocation to the frequency domain) may be supported.

Also, as shown in FIG. 8, the frequency diversity is high in Alt. 1 and the simplicity of CORESET (RE) allocation is high in Alt. 2.

・ (Alt. 3): The REG bundles that make up CORESET are interleaved within each CC.

FIG. 9 shows an example (No. 2) of allocation of CORESET to the frequency domain and the time domain according to the operation example 1-3. As shown in FIG. 9, when the REG bundles constituting CORESET are interleaved within each CC, the UE 200 may assume the allocation of the REG bundle as follows.

(Alt. 3-1): Notifies UE200 of the validity or invalidity of interleaving using the RRC parameter common to all CCs.

(Alt. 3-2): Use a separate RRC parameter for each CC, and notify UE200 that interleaving is valid when the parameter is set to "interleave".

As shown in FIG. 9, interleaving is enabled in CC # 0 and CC # 1 (cce-REG-MappingType).
='interleaved'), but in CC # 2, interleaving is disabled (cce-REG-MappingType)
='nonInterleaved'). Therefore, in the case of Alt. 3-2, in CC # 2, REG bundles # 6 to # 8 are assigned in the same order without interleaving.

(3.4) Operation example 2
This operation example relates to a new CORESET configuration. Specifically, in this operation example, when CORESET is transmitted separately via multiple CCs, the aggregation level (AL) of the control channel element (CCE) is set higher than 3GPP Release-15, 16. .. Further, in this operation example, when CORESET is transmitted separately via a plurality of CCs, the number of resource element groups (REGs) (may be the number of REG bundles) included in the CCE is larger than the case where CORESET is not transmitted separately. Is also set a lot.

Specifically, the AL of CCE can be set to 1, 2, 4, 8, 16 in GPP Release-15, 16, but a larger value, for example, 32, 64, etc. may be set.

UE200 may assume such AL when CORESET is transmitted separately via multiple CCs.

For example, the following fields may be added to the RRC layer parameter nrofCandidate.

・ AggregationLevel32 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8}
In particular, high AL is suitable for multiplexing methods other than FDM (time division multiplexing (TDM), spatial division multiplexing (SDM)) in which all bandwidth is allocated to a specific UE.

Also, when CORESET is transmitted separately via multiple CCs, UE200 may make the following assumptions regarding AL.

・ (Alt. 1): Only one of the ALs is set for the synchronization signal (SS).

In this case, UE200 may further make the following assumptions.

(Alt. 1-1): The AL to be set is predetermined and fixed.

For example, UE200 may be assumed to monitor PDCCH transmitted via grouped CCs. In this case, the AL of CCE may be assumed to be 16 (or other AL may be assumed).

(Alt. 1-2): AL is set by the parameters of the upper layer.

In this case, the complexity of Blind Decoding (BD) can be reduced, and the high AL is suitable for multiplexing methods other than FDM in which all bandwidth is allocated to a specific UE.

・ (Alt. 2): No particular restrictions.

UE200 may assume 1, 2, 4, 8, 16 as the AL of CCE, similar to 3GPP Release-15, 16. The UE 200 may also assume a high AL, such as 32, if it is supported.

Furthermore, the CCE may consist of more REGs than 3GPP Release-15,16. In 3GPP Release-15,16, the CCE can include 6 REG bundles, but if a high frequency band such as FR2x is used, it may be composed of k · 6 REGs.

Here, "k" may be determined according to any of the following.

・ (Alt. 1): k is set by the parameters of the upper layer.

Specifically, k realizes scaling for the RRC layer parameter, CCE-REG-MappingType.

・ (Alt. 2): k is determined according to the BWP size.

Table 1 shows an example of k according to the BWP size.

As shown in Table 1, as the BWP size increases, the size of k may also increase. That is, the larger the BWP size, the more REG bundles (REGs) may be included in the CCE.

Also, the size of the REG bundle may be increased to 12, etc. The size of such a large REG bundle may be set by the parameters of the upper layer.

For example, reg-BundleSize may be set as follows.

・ Reg-BundleSize ENUMERATED {n2, n3, n6, n12}
(3.5) Operation example 3
This operation example relates to mutual cooperation between CORESET and the search space. Specifically, in this operation example, when CORESET is transmitted separately via a plurality of CCs, the relationship between CORESET and the common search space (CSS) is changed.

In 3GPP Release-15,16, CORESET and search space set are set for each DLBWP. Assuming that CORESET is scheduled across multiple CCs, the settings may be reviewed as follows.

(Alt. 1): The upper layer parameters related to CORESET and search space are set for the grouped CCs independently of the existing parameters for each CC.

In this case, the number of CORESETs for the grouped CCs may be expressed as "x". x may be different from the existing parameter “P” (see 3GPP TS38.213 Section 10.1), which indicates the number of CORESETs per cell. The CORESET index may or may not be contiguous with P. That is, the grouped CORESET index for CC and the CORESET index per cell may be serial numbers or different numbers may be assigned.

Also, the number of grouped search spaces for CC may be expressed as "y". y may be different from the existing parameter “S” (see 3GPP TS38.213 Chapter 10.1), which indicates the number of sync signals (SS) per cell. The search space index may or may not be contiguous with S. In addition, SS may only be associated with CORESET for grouped CCs.

・ (Alt. 2): Similar to 3GPP Release-15, 16, the upper layer parameters related to CORESET and search space are set for each DL BWP.

In this case, it is desirable that the search space set associated with CORESET scheduled across multiple CCs has the same parameters. The parameters (see 3GPP TS38.213, Section 10.1) may include the monitoring cycle, monitoring offset, number of PDCCH candidates, and monitorable DCI format.

(3.6) Operation example 4
This operation example relates to changing the PUSCH preparation time (and PDSCH decoding time). In 3GPP Release-15, 16, the processing time for PDCCH is 10, 12, 23, 36 (μ =) shown in Table 2 as _{PUSCH preparation time N 2 (PUSCH timing capability 1), which shows the timeline between PDCCH and PUSCH.} 0, 1, 2, 3) are specified.

On the other hand, in this operation example, when a different frequency band including a high frequency band such as FR2x is used, PUSCH preparation time N ₂ may be changed. For example, “m1” (μ = n1) as shown in Table 2 may be added for a high frequency band such as FR2x. For m1, a value exceeding 36, for example, 48 may be set.

Further, when a large SCS such as 240 kHz is used, a larger value may be set as _{PUSCH preparation time N 2.}

Note that PUSCH preparation time N ₂ (PUSCH timing capability 2) shown in Table 3 may not be supported for large SCSs, as in 3GPP Releases-15 and 16. PUSCH preparation time N ₂ (PUSCH timing capability 1, 2) is described in 3GPP TS38.214, Chapter 6.4.

Moreover, to extend the _{PUSCH preparation time N 2 (PUSCH timing} capability 2), eliminates the restriction of the frequency bands applied in the SCS of 60 kHz, supports SCS of 120kHz with large PUSCH preparation time N ₂ than 11 May be good.

Further, the change in the processing time related to PDCCH as described above may be applied to the decoding time of PDSCH. Specifically, when a different frequency band including a high frequency band such as FR2x is used, the PDSCH decoding time N ₁ shown in Table 4 may be changed.

For example, for high frequency bands such as FR2x, "m2" (dmrs-AdditionalPosition = pos0) and "m3" (dmrs-AdditionalPosition ≠ pos0) (μ = n2) as shown in Table 4 may be added. A value exceeding 20 may be set for m2, and a value exceeding 24 may be set for m3.

(4) Action / Effect According to the above-described embodiment, the following action / effect can be obtained. Specifically, in the UE 200, the first region of CORESET is transmitted via the first component carrier (for example, CC # 0, see FIG. 6 and the like), and the second region of CORESET is transmitted via the second component carrier (for example, CC). It can be assumed that the divided transmission is transmitted via # 1).

Therefore, the UE200 can assume a more efficient CORESET setting, especially when the usable frequency band is expanded and more CCs are set. As a result, efficient CORESET transmission using a plurality of CCs can be realized.

In the present embodiment, the UE 200 may assume that the aggregation level (AL) of the control channel element (CCE) constituting the CORESET is higher in the case of the CORESET divided transmission than in the case where the CORESET is not divided and transmitted.

Further, in the present embodiment, the UE 200 assumes that the number of resource element groups (REGs) (may be the number of REG bundles) included in the CCE is larger in the case of CORESET divided transmission than in the case where CORESET is not divided and transmitted. You may.

This makes it possible to realize efficient CORESET transmission using multiple CCs.

In the present embodiment, the UE 200 may assume that the parameters of the upper layer regarding CORESET or common search space (CSS) are applied to a group of a plurality of CCs used for the divided transmission. Therefore, the parameter can be applied to a plurality of CCs included in the group at once, and efficient CORESET or CSS settings can be realized.

In the present embodiment, in the UE 200, it can be assumed that the first region and the second region of CORESET are divided into a plurality of CCs and transmitted, and are further assigned to different positions in the time domain. As a result, CORESET can be divided and transmitted even in the time domain, and more efficient CORESET transmission using a plurality of CCs can be realized.

In the present embodiment, the UE 200 is PUSCH longer in the case of a high frequency band such as FR2x, that is, a different frequency band different from the frequency band including one or more frequency ranges (FR1, FR2), than in the case of the frequency band. You may assume preparation time.

Therefore, the UE200 can assume an appropriate uplink data channel (PUSCH) preparation time even when using a high frequency band such as FR2x. As a result, UL communication via PUSCH can be realized more reliably even when the different frequency band is used.

In the present embodiment, when the subcarrier interval (SCS) used for PUSCH transmission is larger than that in the frequency band including FR1 and FR2, the UE200 assumes a PUSCH preparation time longer than that in the frequency band. You may. Therefore, the UE 200 can assume an appropriate preparation time according to the SCS even when the different frequency band is used, and can more reliably realize UL communication via PUSCH.

In the present embodiment, the UE 200 may assume a PDSCH decoding time longer in the case of the different frequency band than in the case of the frequency band including FR1 and FR2. Therefore, the UE 200 can assume an appropriate PDSCH decoding time even when the different frequency band is used, and can more reliably realize DL communication via the PDSCH.

(5) Other Embodiments Although the embodiments have been described above, it is obvious to those skilled in the art that various modifications and improvements are possible without being limited to the description of the embodiments.

For example, in the above-described embodiment, it is assumed that a high frequency band such as FR2x is used, but at least one of the above-mentioned operation examples is applied to another frequency range, for example, a frequency band between FR1 and FR2. It doesn't matter if it is done.

Further, FR2x may be divided into a frequency range of 70 GHz or less and a frequency range of 70 GHz or more, and any of the above-mentioned operation examples is partially applied to the frequency range of 70 GHz or more and the frequency range of 70 GHz or less. May be applied to.

Further, the block configuration diagram (FIG. 4) used in the description of the above-described embodiment shows a block for each functional unit. These functional blocks (components) 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 may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices. The functional block may be realized by combining the software with the one device or the plurality of devices.

Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but limited to these I can't. For example, a functional block (constituent unit) that makes transmission function is called a transmitting unit (transmitting unit) or a transmitter (transmitter). As described above, the method of realizing each of them is not particularly limited.

Further, the UE 200 described above may function as a computer that processes the wireless communication method of the present disclosure. FIG. 10 is a diagram showing an example of the hardware configuration of the UE 200. As shown in FIG. 10, the UE 200 may 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, a bus 1007, and the like.

In the following explanation, the word "device" can be read as a circuit, device, unit, etc. The hardware configuration of the device may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.

Each functional block of UE200 (see FIG. 4) is realized by any hardware element of the computer device or a combination of the hardware elements.

In addition, each function in the UE 200 is such that the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the memory 1002, and controls the communication by the communication device 1004, or the memory 1002 and the memory 1002. It is realized by controlling at least one of reading and writing of data in the storage 1003.

Processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.

Further, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. Further, the various processes described above may be executed by one processor 1001 or may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunication line.

The memory 1002 is a computer-readable recording medium, and is composed of at least one such as ReadOnlyMemory (ROM), ErasableProgrammableROM (EPROM), Electrically ErasableProgrammableROM (EEPROM), and RandomAccessMemory (RAM). May be done. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, or the like that can execute the method according to the embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, for example, an optical disk such as Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, or a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. Storage 1003 may be referred to as auxiliary storage. The recording medium described above may be, for example, a database, server or other suitable medium containing at least one of memory 1002 and storage 1003.

The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.

The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be composed of.

The input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

In addition, each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information. Bus 1007 may be configured using a single bus or may be configured using different buses for each device.

Further, the device includes hardware such as a microprocessor, a digital signal processor (Digital Signal Processor: DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), and a Field Programmable Gate Array (FPGA). The hardware may implement some or all of each functional block. For example, processor 1001 may be implemented using at least one of these hardware.

Further, the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using another method. For example, information notification includes physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI), upper layer signaling (eg, RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block)). (MIB), System Information Block (SIB)), other signals or a combination thereof. RRC signaling may also be referred to as an RRC message, for example, RRC Connection Setup. ) Message, RRC Connection Reconfiguration message, etc. may be used.

Each aspect / embodiment described in the present disclosure includes LongTermEvolution (LTE), LTE-Advanced (LTE-A), SUPER3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system ( 5G), FutureRadioAccess (FRA), NewRadio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UltraMobile Broadband (UMB), IEEE802.11 (Wi-Fi (registered trademark)) , IEEE802.16 (WiMAX®), IEEE802.20, Ultra-WideBand (UWB), Bluetooth®, and other systems that utilize appropriate systems and at least one of the next-generation systems extended based on them. It may be applied to one. In addition, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.

In some cases, the specific operation performed by the base station in the present disclosure may be performed by its upper node. In a network consisting of one or more network nodes having a base station, various operations performed for communication with a terminal are performed by the base station and other network nodes other than the base station (for example, MME or). It is clear that it can be done by at least one of (but not limited to, S-GW, etc.). Although the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).

Information and signals (information, etc.) can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information can be overwritten, updated, or added. The output information may be deleted. The input information may be transmitted to another device.

The determination may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example, a predetermined value). It may be done by comparison with the value).

Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.

Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module. , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc. should be broadly interpreted.

Further, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, a website, where the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.). When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.

Note that the terms explained in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, the signal may be a message. Further, the component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

In addition, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, the radio resource may be one indicated by an index.

The names used for the above parameters are not limited in any respect. Further, mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. Since various channels (eg, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are in any respect limited names. is not it.

In this disclosure, "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", "cell group" Terms such as "carrier" and "component carrier" can be used interchangeably. Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.

The base station can accommodate one or more (for example, three) cells (also called sectors). When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)). Communication services can also be provided by Head: RRH).

The term "cell" or "sector" refers to a base station that provides communication services in this coverage, and part or all of the coverage area of at least one of the base station subsystems.

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

Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like. The moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be. It should be noted that at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation. For example, at least one of a base station and a mobile station may be an Internet of Things (IoT) device such as a sensor.

Further, the base station in the present disclosure may be read as a mobile station (user terminal, the same applies hereinafter). For example, communication between a base station and a mobile station has been replaced with communication between a plurality of mobile stations (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the mobile station may have the functions of the base station. In addition, words such as "up" and "down" may be read as words corresponding to communication between terminals (for example, "side"). For example, the upstream channel, the downstream channel, and the like may be read as a side channel.

Similarly, the mobile station in the present disclosure may be read as a base station. In this case, the base station may have the functions of the mobile station.
The radio frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further consist of one or more slots in the time domain. The subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.

The numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology includes, for example, SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, wireless frame configuration, transmission / reception. At least one of a specific filtering process performed by the machine in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.

The slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. Slots may be in numerology-based time units.

The slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. Further, the mini slot may be referred to as a sub slot. A minislot may consist of a smaller number of symbols than the slot. PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.

The wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal. The radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.

For example, one subframe may be referred to as a transmission time interval (TTI), a plurality of consecutive subframes may be referred to as TTI, and one slot or one minislot may be referred to as TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms. It may be. The unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units. The definition of TTI is not limited to this.

The TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation. When a TTI is given, the time interval (for example, the number of symbols) to which the transport block, code block, code word, etc. are actually mapped may be shorter than the TTI.

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

A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like. TTIs shorter than normal TTIs may also be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.

The long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) may be read as less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.

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

Further, the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI. Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.

One or more RBs include a physical resource block (Physical RB: PRB), a sub-carrier group (Sub-Carrier Group: SCG), a resource element group (Resource Element Group: REG), a PRB pair, an RB pair, and the like. May be called.

Further, the resource block may be composed of one or a plurality of resource elements (ResourceElement: RE). For example, 1RE may be a radio resource area of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (which may also be called partial bandwidth, etc.) may represent a subset of consecutive common RBs (common resource blocks) for a neurology in a carrier. good. Here, the common RB may be specified by the index of the RB with respect to the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP). One or more BWPs may be set in one carrier for the UE.

At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP. In addition, "cell", "carrier" and the like in this disclosure may be read as "BWP".

The above-mentioned structures such as wireless frames, subframes, slots, minislots and symbols are merely examples. For example, the number of subframes contained in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, and included in RB. The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two "connected" or "combined" elements. The connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in the present disclosure, the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. , Electromagnetic energy with wavelengths in the microwave and light (both visible and invisible) regions, etc., can be considered to be "connected" or "coupled" to each other.

The reference signal can also be abbreviated as Reference Signal (RS) and may be called a pilot (Pilot) depending on the applicable standard.

The phrase "based on" as used in this disclosure does not mean "based on" unless otherwise stated. In other words, the statement "based on" means both "based only" and "at least based on".

The "means" in the configuration of each of the above devices may be replaced with "part", "circuit", "device" and the like.

Any reference to elements using designations such as "first", "second" as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Therefore, references to the first and second elements do not mean that only two elements can be adopted there, or that the first element must somehow precede the second element.

When "include", "including" and variations thereof are used in the present disclosure, these terms are as comprehensive as the term "comprising". Is intended. Moreover, the term "or" used in the present disclosure is intended not to be an exclusive OR.

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

The terms "determining" and "determining" used in this disclosure may include a wide variety of actions. "Judgment" and "decision" are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as "judgment" or "decision". Also, "judgment" and "decision" are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (Accessing) (for example, accessing data in memory) may be regarded as "judgment" or "decision". In addition, "judgment" and "decision" mean that the things such as solving, selecting, choosing, establishing, and comparing are regarded as "judgment" and "decision". Can include. That is, "judgment" and "decision" may include considering some action as "judgment" and "decision". Further, "judgment (decision)" may be read as "assuming", "expecting", "considering" and the like.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other". The term may mean that "A and B are different from C". Terms such as "separate" and "combined" may be interpreted in the same way as "different".

Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure may be implemented as an amendment or modification without departing from the purpose and scope of the present disclosure, which is determined by the description of the scope of claims. Therefore, the description of the present disclosure is for the purpose of exemplary explanation and does not have any limiting meaning to the present disclosure.

10 Radio communication system 20 NG-RAN
100A, 100B gNB
UE 200
210 Radio signal transmission / reception unit 220 Amplifier unit 230 Modulation / demodulation unit 240 Control signal / reference signal processing unit 250 Coding / decoding unit 260 Data transmission / reception unit 270 Control unit BM beam 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 bus

Claims (5)

1. A receiver that receives a control resource set including the first area and the second area from the network,
   A terminal including a control unit that assumes split transmission in which the first region is transmitted via the first component carrier and the second region is transmitted via the second component carrier.
2. The terminal according to claim 1, wherein the control unit assumes that in the case of the divided transmission, the aggregation level of the control channel elements constituting the control resource set is higher than in the case where the control resource set is not divided and transmitted.
3. The terminal according to claim 2, wherein the control unit assumes that the number of resource element groups included in the control channel element is larger in the case of the divided transmission than in the case where the control resource set is not divided and transmitted.
4. The terminal according to any one of claims 1 to 3, wherein the control unit assumes that the parameters of the upper layer related to the control resource set or the search space are applied to a group of a plurality of component carriers.
5. The terminal according to any one of claims 1 to 4, wherein the control unit assumes that the first region and the second region are assigned to different positions in the time domain.
   

Images