WO2020059150A1

WO2020059150A1 - User terminal and wireless communication method

Info

Publication number: WO2020059150A1
Application number: PCT/JP2018/035226
Authority: WO
Inventors: 翔平吉岡; 一樹武田; 聡永田; リフェワン
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2018-09-21
Filing date: 2018-09-21
Publication date: 2020-03-26

Abstract

A user terminal that has: a control part that decides on an uplink control channel resource when the timing of HARQ (Hybrid Automatic Repeat reQuest)-ACK (ACKnowledge) transmission that uses a prescribed uplink control channel format and the timing of SR (scheduling request) transmission that uses the uplink control channel format overlap; and a transmission part that uses the uplink control channel format and the uplink control channel resource to transmit the HARQ-ACK and/or the SR. One embodiment of the present disclosure can appropriately decide on an uplink control channel resource for transmission of a plurality of uplink control information types.

Description

User terminal and wireless communication method

The present disclosure relates to a user terminal and a wireless communication method in a next-generation mobile communication system.

2. Description of the Related Art In a UMTS (Universal Mobile Telecommunications System) network, LTE (Long Term Evolution) has been specified for the purpose of higher data rate and lower delay (Non-Patent Document 1). Also, LTE-Advanced (3GPP@Rel.10-14) has been specified for the purpose of further increasing the capacity and upgrading of LTE (3GPP (Third Generation Partnership Project) @Rel. (Release) 8, 9).

A successor system to LTE (for example, 5G (5th generation mobile communication system), 5G + (plus), NR (New Radio), 3GPP Rel. 15 or later) is also being studied.

In existing LTE systems (eg, 3GPP@Rel.8-14), a user terminal (UE: User @ Equipment) includes a UL data channel (eg, PUSCH: Physical @ Uplink @ Shared @ Channel) and a UL control channel (eg, PUCCH: Physical @ Uplink). Using at least one of Control @ Channel, uplink control information (UCI: Uplink @ Control @ Information) is transmitted.

In a future wireless communication system (for example, LTE@Rel.15 or later, 5G, 5G +, NR, etc.), when a user terminal transmits UCI using an uplink control channel (for example, PUCCH), upper layer signaling and downlink control It has been studied to determine a resource (for example, a PUCCH resource) for the uplink control channel based on a predetermined field in the information (DCI).

Also, it is being studied that the user terminal determines the PUCCH resource according to the UCI type (UCCH-ACK (Hybrid Automatic Repeat Repeat reQuest-ACKnowledge), SR (Scheduling Request), CSI (Channel State Information), etc.). However, if appropriate PUCCH resources are not used for a plurality of UCI types, system performance may be degraded.

Therefore, an object of the present disclosure is to provide a user terminal and a radio communication method that appropriately determine uplink control channel resources for transmission of a plurality of uplink control information types.

The user terminal according to an aspect of the present disclosure is configured to transmit HARQ-ACK (Hybrid Automatic Repeat Repeat reQuest-ACKnowledge) using a predetermined uplink control channel format, and SR (Scheduling Request) transmission using the uplink control channel format. And a control unit that determines an uplink control channel resource when overlapping, a transmission unit that transmits at least one of the HARQ-ACK and the SR using the uplink control channel format and the uplink control channel resource, It is characterized by having.

According to an aspect of the present disclosure, it is possible to appropriately determine uplink control channel resources for transmission of a plurality of uplink control information types.

FIG. 1 is a diagram illustrating an example of a PUCCH resource for HARQ-ACK. FIG. 2 is a diagram illustrating an example of the PUCCH resource for SR. FIG. 3 is a diagram illustrating an example of a PUCCH resource for HARQ-ACK according to an embodiment. FIG. 4 is a diagram illustrating an example of the SR PUCCH resource according to the embodiment. FIG. 5 is a diagram illustrating an example of a schematic configuration of the wireless communication system according to the embodiment. FIG. 6 is a diagram illustrating an example of a configuration of the base station according to the embodiment. FIG. 7 is a diagram illustrating an example of a configuration of the user terminal according to the embodiment. FIG. 8 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the embodiment.

In a future wireless communication system (eg, LTE@Rel.15 or later, 5G, NR, etc.), a configuration (also referred to as a format, PUCCH format (PF), etc.) for an uplink control channel (eg, PUCCH) used for UCI transmission. Is being considered. For example, LTE @ Rel. In No. 15, it is studied to support five types of PFs 0 to 4. Note that the names of the PFs shown below are merely examples, and different names may be used.

For example,

PFs

0 and 1 are PFs used to transmit UCI of 2 bits or less (up to 2 bits) (for example, acknowledgment information (HARQ-ACK: Hybrid Automatic Repeat Repeat reQuest-Acknowledge, ACK or NACK, etc.)). It is. Since PF0 can be assigned to one or two symbols, it is also called a short PUCCH, a sequence-based short PUCCH, or the like. On the other hand, PF1 can be assigned to 4-14 symbols, and is therefore also called long PUCCH or the like. In PF1, a plurality of user terminals may be code division multiplexed (CDM) in the same PRB by block spreading in the time domain using at least one of CS and OCC.

The PF2-4 is used for transmitting UCI (for example, Channel State Information (CSI: Channel State Information) (or CSI and HARQ-ACK and / or scheduling request (SR)) more than 2 bits). This is the PF used. Since PF2 can be assigned to one or two symbols, it is also called short PUCCH or the like. On the other hand, PF3 and PF4 are also called long PUCCH or the like because they can be assigned to 4-14 symbols. In PF4, a plurality of user terminals may be subjected to CDM using block spreading before (DFT) (frequency domain).

リソース Allocation of resources (for example, PUCCH resources) used for transmission of the uplink control channel is performed using higher layer signaling and / or downlink control information (DCI). Here, the upper layer signaling is, for example, at least one of RRC (Radio Resource Control) signaling, system information (for example, RMSI: Remaining Minimum System Information, OSI: Other System Information, MIB: Master Information Block, SIB: System Information Block). And broadcast information (PBCH: Physical @ Broadcast @ Channel).

Specifically, one or more sets (PUCCH resource sets) each containing one or more PUCCH resources are notified (configured) to the user terminal by higher layer signaling. For example, K (for example, 1 ≦ K ≦ 4) PUCCH resource sets may be notified from the radio base station to the user terminal. Each PUCCH resource set may include M (for example, 8 ≦ M ≦ 32) PUCCH resources.

The user terminal may determine a single PUCCH resource set (first PUCCH resource set) from the set K PUCCH resource sets based on the UCI payload size (UCI payload size, number of UCI information bits). . The UCI payload size may be the number of UCI bits that do not include Cyclic Redundancy Code (CRC) bits.

The user terminal determines at least one of DCI and implicit information (also referred to as implicit indication information or implicit index) from the M PUCCH resources included in the determined PUCCH resource set. May be used to determine a PUCCH resource used for UCI transmission. For example, the implicit indication information may be a head CCE index of PDCCH reception carrying the DCI.

Each PUCCH resource set in the user terminal may include the value of at least one of the following parameters (also referred to as fields or information). Note that a range of possible values for each PUCCH format may be defined for each parameter.
Symbol for which PUCCH allocation is started (start symbol)
-Number of symbols allocated to PUCCH in a slot (period allocated to PUCCH)
-Index of resource block (physical resource block (PRB)) at which PUCCH allocation is started-Number of PRBs allocated to PUCCH-Whether to enable frequency hopping for PUCCH-Frequency hopping is enabled Frequency resources of the second hop in case, index of initial cyclic shift (CS), index of orthogonal spreading code (for example, OCC: Orthogonal Cover Code) in time-domain, discrete Fourier transform (DFT) OCC length used for previous block spreading (also called OCC length, spreading factor, etc.)
・ OCC index used for block-wise spreading after DFT

As shown in FIG. 1, the user terminal may be configured with PUCCH resource sets # 0 to # 3 as PUCCH resources for HARQ-ACK transmission. The user terminal selects any PUCCH resource set based on the UCI payload size.

For example, when the UCI payload size is 1 or 2 bits, PUCCH resource set # 0 is selected. When the UCI payload size is 3 bits or more and N ₂ -1 bits or less, PUCCH resource set # 1 is selected. If the UCI payload size is equal to or greater than N ₂ bits and equal to or less than N ₃ -1 bits, PUCCH resource set # 2 is selected. Similarly, UCI payload size is less than or equal _N 3 -1 bits ₃ bits or more _N, PUCCH resource set # 3 is selected.

Thus, PUCCH resource set #i (i = 0, ..., K-1) in the range of UCI payload size to be selected, _{N i} bits or more _{N i +} 1 -1 bit or less (i.e., _{N i, ..., N _{i + 1} −1} bits).

Here, the start positions (number of start bits) N ₀ and N ₁ of the UCI payload size for PUCCH resource sets # 0 and # 1 may be 1, 3 respectively. By this means, when transmitting UCI of 2 bits or less, PUCCH resource set # 0 is selected, so PUCCH resource set # 0 includes PUCCH resources # 0 to # M-1 for at least one of PF0 and PF1. May be included. On the other hand, when transmitting UCI exceeding 2 bits, one of PUCCH resource sets # 1 to # 3 is selected, so that PUCCH resource sets # 1 to # 3 each include at least one of PF2, PF3 and PF4. PUCCH resources # 0 to # M-1.

When i = 2,..., K−1, information (start position information) indicating the start position (N _i ) of the payload size of the UCI for PUCCH resource set #i is transmitted to the user terminal using upper layer signaling. It may be notified (set). The start position ( _Ni ) may be unique to the user terminal. For example, the start position (N _i ) may be set to a value in a range from 4 bits to 256 (for example, a multiple of 4). For example, information indicating the start position (N ₂ , N ₃ ) of the UCI payload size for PUCCH resource sets # 2 and # 3 is notified to the user terminal, respectively, by upper layer signaling (for example, user-specific RRC signaling). You.

The maximum payload size of UCI for each PUCCH resource set is given by N _K -1. N _K is explicitly notified to the user terminal by higher layer signaling and / or DCI (setting) may be, or may be implicitly derived. For example, in FIG. 1, N ₀ = 1 and N ₁ = 3 are defined in the specification, and N ₂ and N ₃ may be notified by higher layer signaling. Further, N ₄ may be defined in the specification (for example, N ₄ = 1000).

The UE may be set with parameters (PUCCH configuration information, PUCCH-Config) necessary for PUCCH transmission by higher layer signaling. The PUCCH setting information may include a list of PUCCH resource set information (for example, PUCCH-ResourceSet). The PUCCH resource set information may include a list (for example, resourceList) of PUCCH resource IDs (index, for example, PUCCH-ResourceId).

If the UE has dedicated PUCCH resource configuration information (after RRC setup), the UE determines a PUCCH resource set ID (index, for example, PUCCH-ResourceSetId) according to the number of UCI information bits.

A case will be described where the UE determines a PUCCH resource set such as PUCCH resource sets # 1, # 2, and # 3 in FIG. 1 based on the number of UCI information bits. If the number of PUCCH resources in the determined PUCCH resource set is 8 or less, the UE is also called a PUCCH resource indication (PRI (PUCCH @ Resource @ Indicator), ARI (ACK / NACK @ Resource @ Indicator) in DCI format 1_0 or 1_1. ) Determine the PUCCH resource ID according to the field.

A case will be described where the UE determines the first PUCCH resource set, such as PUCCH resource set # 0 in FIG. 1, based on the number of UCI information bits. If the determined number of PUCCH resources PUCCH resource set is greater than 8, UE includes a PUCCH resource indication field delta _PRI in DCI format 1_0 or 1_1, the CCE in CORESET p of PDCCH receiving carrying the DCI Using the following equation based on the number N _{CCE, p} , the index n _{CCE, p of the first} CCE of the PDCCH reception _, and the number R _PUCCH of PUCCH resources in the PUCCH resource set, the PUCCH resource ID r _PUCCH is decide.

ＵＥ In addition, the UE may be configured with a list of SR resource configuration information according to the PUCCH configuration information. Each SR resource configuration information (SchedulingRequestResourceConfig) may include an SR resource ID (SchedulingRequestResourceId), an SR @ ID (SchedulingRequestId), a PUCCH resource ID (PUCCH-ResourceId), and timing information (cycle and offset).

ＵＥAs shown in FIG. 2, the UE may set the association between the SR ID and the PUCCH resource ID as a PUCCH resource for SR transmission by a list of SR resource setting information. Also, the UE may be configured with the SR @ ID by higher layer signaling. The UE may use the SR resource configuration information corresponding to the SR @ ID.

Also, the maximum number of PUCCH resources for each PUCCH resource set, the maximum number of PUCCH resources for each PUCCH resource set other than PUCCH resource set # 0, the maximum number of PUCCH resources, and the maximum number of PUCCH resource sets are being studied. For example, the maximum number of PUCCH resources for each PUCCH resource set is 32, the maximum number of PUCCH resources for each PUCCH resource set other than PUCCH resource set # 0 is 8, the maximum number of PUCCH resources is 128, and the maximum number of PUCCH resource sets is It is under study to set it to 4.

範囲 Also, the range of PUCCH resource ID is being studied. It is being studied that the range of the PUCCH resource ID is from 0 to 55.

In the example of FIG. 1, the number of PUCCH resources in PUCCH resource set # 0 is 32, and the number of PUCCH resources in each other PUCCH resource set is 8. PUCCH resource IDs 0 to 55 are allocated to PUCCH resource sets # 0 to # 3.

In the examples of FIGS. 1 and 2, the PUCCH resource ID for SR overlaps a part of the PUCCH resource ID for HARQ-ACK. That is, the PUCCH resource ID may be shared for HARQ-ACK and for SR or CSI.

A description will be given of a PUCCH transmission method when the UE transmits HARQ-ACK and SR using PF1 (when the HARQ-ACK transmission timing using PF1 and the SR transmission timing using PF1 match). If the SR is positive, the UE may transmit a HARQ-ACK on the SR PUCCH resource. If the SR is negative (negative), the UE may transmit HARQ-ACK on the PUCCH resource for HARQ-ACK.

When the PUCCH resource for SR and the PUCCH resource for HARQ-ACK are different and the PUCCH is transmitted according to this PUCCH transmission method, the base station determines the value of SR (positive SR or negative SR) based on the received PUCCH resource. it can. However, when the PUCCH resource for SR and the PUCCH resource for HARQ-ACK are the same and the PUCCH is transmitted according to this PUCCH transmission method, the PUCCH resource does not change with the value of SR. Cannot be determined. If the SR is not correctly notified, there is a possibility that the system performance will decrease, such as a decrease in communication throughput.

Therefore, the present inventors have conceived a method of appropriately determining a PUCCH resource for transmission of HARQ-ACK and SR.

問題 When PF0, 2, 3, 4 are used, such a problem does not occur. For example, when transmitting the HARQ-ACK and SR or the HARQ-ACK and CSI using the PF2 or 3 or 4, the UE determines the PUCCH resource set based on the UCI payload size, and determines the PUCCH resource based on the DCI. To determine. When the UE transmits HARQ-ACK and SR using PF0, the UE multiplexes HARQ-ACK and SR on one PUCCH resource by a cyclic shift based on values associated with HARQ-ACK and SR.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The wireless communication method according to each embodiment may be applied alone or in combination.

(Wireless communication method)
(Aspect 1)
The UE may expect that more than one PUCCH resource with the same PUCCH resource ID will not overlap.

The UE may expect that for a PUCCH using PF1, more than one PUCCH resource with the same PUCCH resource ID will not overlap. When transmitting the HARQ-ACK and the SR using the PF1, the UE may expect that the PUCCH resource for HARQ-ACK and the PUCCH resource for SR do not overlap.

According to this aspect 1, even when the timing of HARQ-ACK transmission using the predetermined PUCCH format and the timing of SR transmission using the predetermined PUCCH format overlap, by avoiding duplication of PUCCH resources, , The base station can properly recognize the UCI. Further, the UE can be easily mounted, and the load on the UE can be reduced.

(Aspect 2)
The UE may assume that the PUCCH resource ID for SR set by higher layer parameters is not the same as the PUCCH resource ID for HARQ-ACK set by higher layer parameters.

数 The number of PUCCH resource IDs for HARQ-ACK may be smaller than the total number of PUCCH resource IDs. The range of the PUCCH resource ID for HARQ-ACK may be a part of the range of the PUCCH resource ID. The PUCCH resource ID for SR may be outside the range of the PUCCH resource ID for HARQ-ACK in the range of the PUCCH resource ID. In this case, the PUCCH resource ID for HARQ-ACK and the PUCCH resource ID for SR do not overlap.

総数 The total number of PUCCH resource IDs may be 56. In this case, it is possible to avoid duplication of the PUCCH resource ID for HARQ-ACK and the PUCCH resource ID for SR without increasing the total number of PUCCH resource IDs.

{For example, when the range of the PUCCH resource ID is 0 to 55, the range of the HARQ-ACK PUCCH resource ID may be 0 to 47 as shown in FIG. In this case, as shown in FIG. 4, the PUCCH resource ID for SR may be set from a range of 48 to 55 outside the range of the PUCCH resource ID for HARQ-ACK.

総数 The total number of PUCCH resource IDs may be more than 56. In this case, it is possible to avoid duplication of the PUCCH resource ID for HARQ-ACK and the PUCCH resource ID for SR without increasing the number of PUCCH resource IDs for HARQ-ACK.

(Aspect 3)
In the PUCCH transmission using PF1, the HARQ-ACK PUCCH resource may collide with the SR PUCCH resource having the same PUCCH resource ID.

The UE may use the HARQ-ACK PUCCH resource, may use the SR PUCCH resource as the transmission PUCCH resource for the PUCCH transmission, or may use the HARQ-ACK PUCCH resource and the SR PUCCH resource. Different specific PUCCH resources may be used. The UE may be set (instructed) for a specific PUCCH resource by higher layer signaling.

In this case, the UE may follow one of the following aspects 3-1 to 3-3.

<Aspect 3-1>
The UE drops the SR (does not transmit the SR) and transmits HARQ-ACK using the transmission PUCCH resource.

<Aspect 3-2>
The UE drops the HARQ-ACK (does not transmit the HARQ-ACK) and transmits the SR using the transmission PUCCH resource.

<Aspect 3-3>
The UE may multiplex and transmit HARQ-ACK and SR.

The UE may transmit HARQ-ACK and SR according to one of the following 3-3-1 to 3-3-3.

<< Aspect 3-3-1 >>
When transmitting 2-bit HARQ-ACK, the UE applies 1-bit HARQ-ACK by applying the 2-bit HARQ-ACK bundling, regardless of whether spatial bundling is set. It may generate and transmit the 1-bit HARQ-ACK and SR. For example, the UE may generate a 1-bit HARQ-ACK by performing a 2-bit HARQ-ACK operation (eg, an AND operation) on reception of two transport blocks (TBs).

<< Aspect 3-3-2 >>
When spatial bundling is set and the UE transmits 2-bit HARQ-ACK, the UE generates 1-bit HARQ-ACK by applying the bundling of the 2-bit HARQ-ACK, and generates the 1-bit HARQ-ACK. And SR may be transmitted.

<< Aspect 3-3-3 >>
The UE may notify the SR implicitly. The UE may be set to different values of a predetermined parameter (resource) for the positive SR and the negative SR. The UE may transmit HARQ-ACK using the transmission PUCCH resource and the parameter value corresponding to the SR value.

The parameter may be a transmission power or a DMRS sequence for PF1. The base station may determine the notified SR based on whether the received power exceeds a predetermined threshold, or may determine the notified SR based on the received sequence. The power may be represented by a ratio (offset) between the power of the RE of the DMRS and the power of the resource element (RE) of another uplink signal (eg, UCI). The DMRS sequence may be specified by at least one of a base sequence and a cyclic shift (eg, m _CS ). Instead of the DMRS sequence, a sequence for PF1 sequence modulation (a sequence multiplied by UCI) may be used.

According to the third aspect, the scheduling flexibility can be improved by allowing the HARQ-ACK PUCCH resource and the SR PUCCH resource to overlap. Further, even when the timing of HARQ-ACK transmission using the predetermined PUCCH format and the timing of SR transmission using the predetermined PUCCH format overlap, the base station can appropriately recognize the UCI.

(Wireless communication system)
Hereinafter, the configuration of the wireless communication system according to an embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using any of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

FIG. 5 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using LTE (Long Term Evolution) and 5G NR (5th generation mobile communication system New Radio) specified by 3GPP (Third Generation Partnership Project). .

Also, the wireless communication system 1 may support dual connectivity between a plurality of RATs (Radio Access Technology) (multi-RAT dual connectivity (MR-DC: Multi-RAT Dual Connectivity)). MR-DC is based on dual connectivity (EN-DC: E-UTRA-NR @ Dual Connectivity) between LTE (Evolved Universal Terrestrial Radio Access) and NR, and dual connectivity (NE-DC with E-UTRA-NR Dual Connectivity). -DC: NR-E-UTRA (Dual Connectivity) may be included.

In @ EN-DC, the base station (eNB) of LTE (E-UTRA) is a master node (MN: Master @ Node), and the base station (gNB) of NR is a secondary node (SN: Secondary @ Node). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

The wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity in which both MN and SN are NR base stations (gNB) (NN-DC: NR-NR Dual Connectivity)). ) May be supported.

The wireless communication system 1 includes a base station 11 forming a macro cell C1 having relatively wide coverage, and a base station 12 (12a to 12c) arranged in the macro cell C1 and forming a small cell C2 smaller than the macro cell C1. May be provided. User terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminals 20 are not limited to the modes shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as a base station 10.

The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation) using a plurality of component carriers (CC: Component Carrier) and dual connectivity (DC).

Each CC may be included in at least one of the first frequency band (FR1: FrequencyFRange 1) and the second frequency band (FR2: Frequency Range 2). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). The frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

In addition, the user terminal 20 may perform communication using at least one of time division duplex (TDD: Time Division Duplex) and frequency division duplex (FDD: Frequency Division Duplex) in each CC.

The plurality of base stations 10 may be connected by wire (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface, or the like) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station is an IAB (Integrated Access Backhaul) donor, and the base station 12 corresponding to the relay station (relay) is the IAB It may be called a node.

The base station 10 may be connected to the core network 30 via another base station 10 or directly. The core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and the like.

The user terminal 20 may be a terminal that supports at least one of the communication systems such as LTE, LTE-A, and 5G.

In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM) based wireless access scheme may be used. For example, in at least one of the downlink (DL) and the uplink (UL: Uplink), CP-OFDM (Cyclic Prefix OFDM), DFT-s-OFDM (Discrete Fourier Transform Spread OFDM), OFDMA (Orthogonal Frequency Division Divide Multiple). Access), SC-FDMA (Single Carrier Frequency Frequency Division Multiple Access), or the like may be used.

The wireless access scheme may be referred to as a waveform. In the wireless communication system 1, another wireless access method (for example, another single carrier transmission method or another multi-carrier transmission method) may be used for the UL and DL wireless access methods.

In the wireless communication system 1, a downlink shared channel (PDSCH: Physical Downlink Shared Channel), a broadcast channel (PBCH: Physical Broadcast Channel), and a downlink control channel (PDCCH: Physical Downlink Control) are shared by the user terminals 20 as downlink channels. Channel) may be used.

In the wireless communication system 1, as an uplink channel, an uplink shared channel (PUSCH: Physical Uplink Shared Channel) shared by each user terminal 20, an uplink control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH) : Physical Random Access Channel) or the like may be used.

The user data, upper layer control information, SIB (System Information Block), and the like are transmitted by the PDSCH. User data, higher layer control information, and the like may be transmitted by the PUSCH. In addition, MIB (Master Information Block) may be transmitted by PBCH.

下位 Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, downlink control information (DCI: Downlink Control Information) including scheduling information of at least one of the PDSCH and the PUSCH.

Note that the DCI for scheduling the PDSCH may be referred to as DL assignment, DL @ DCI, or the like, and the DCI for scheduling the PUSCH may be referred to as UL grant, UL @ DCI, or the like. Note that PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

A control resource set (CORESET: Control REsource SET) and a search space (search space) may be used for detecting the PDCCH. CORESET corresponds to a resource for searching DCI. The search space corresponds to a search area and a search method of PDCCH candidates (PDCCH @ candidates). One coreset may be associated with one or more search spaces. The UE may monitor a RESET associated with a search space based on the search space settings.

One SS may correspond to a PDCCH candidate corresponding to one or a plurality of aggregation levels (aggregation Level). One or more search spaces may be referred to as a search space set. In addition, “search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, and the like in the present disclosure may be interchanged with each other.

By PUCCH, acknowledgment information of channel state information (CSI: Channel \ State \ Information) (for example, may be called HARQ-ACK (Hybrid \ Automatic \ Repeat \ reQuest), ACK / NACK, etc.), scheduling request (SR: Scheduling \ Request) ) May be transmitted. A random access preamble for establishing a connection with a cell may be transmitted by the PRACH.

In the present disclosure, a downlink, an uplink, and the like may be expressed without a “link”. In addition, various channels may be expressed without “Physical” at the beginning.

In the wireless communication system 1, a synchronization signal (SS: Synchronization Signal), a downlink reference signal (DL-RS: Downlink Reference Signal), or the like may be transmitted. In the wireless communication system 1, as a DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), and a demodulation reference signal (DMRS: DeModulation) are provided. Reference Signal, a position determination reference signal (PRS: Positioning Reference Signal), a phase tracking reference signal (PTRS: Phase Tracking Reference Signal), and the like may be transmitted.

The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS: Primary Synchronization Signal) and a secondary synchronization signal (SSS: Secondary Synchronization Signal). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SSB (SS @ Block), and the like. Note that SS, SSB, and the like may also be referred to as reference signals.

In the wireless communication system 1, a measurement reference signal (SRS: Sounding Reference Signal), a demodulation reference signal (DMRS), and the like may be transmitted as an uplink reference signal (UL-RS: Uplink Reference Signal). The DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal).

(base station)
FIG. 6 is a diagram illustrating an example of a configuration of the base station according to the embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140. The control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140 may each include one or more.

Note that, in this example, functional blocks of characteristic portions in the present embodiment are mainly shown, and it may be assumed that base station 10 also has other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

The control unit 110 controls the entire base station 10. The control unit 110 can be configured by a controller, a control circuit, and the like described based on common recognition in the technical field according to the present disclosure.

The control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping), and the like. The control unit 110 may control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140. The control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the generated data to the transmission / reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.

The transmission / reception unit 120 may include a baseband unit 121, an RF (Radio Frequency) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmission / reception unit 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transmission / reception circuit, and the like described based on common recognition in the technical field according to the present disclosure. be able to.

The transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit. The transmission unit may include a transmission processing unit 1211 and an RF unit 122. The receiving unit may include a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

The transmission / reception antenna 130 can be configured from an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna or the like.

The transmission / reception unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transmission / reception unit 120 may receive the above-described uplink channel, uplink reference signal, and the like.

The transmission / reception unit 120 may form at least one of the transmission beam and the reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

The transmission / reception unit 120 (transmission processing unit 1211) processes the data, control information, and the like acquired from the control unit 110 in the PDCP (Packet Data Convergence Protocol) layer and the RLC (Radio Link Control) layer processing (for example, RLC retransmission control), MAC (Medium Access Control) layer processing (for example, HARQ retransmission control), and the like may be performed to generate a bit string to be transmitted.

The transmission / reception unit 120 (transmission processing unit 1211) performs channel coding (may include error correction coding), modulation, mapping, filter processing, and discrete Fourier transform (DFT: Discrete Fourier Transform) processing on a bit string to be transmitted. Transmission processing such as Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-analog conversion (if necessary) may be performed to output a baseband signal.

The transmission / reception unit 120 (RF unit 122) may perform modulation, filtering, amplification, and the like on the baseband signal into a radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. .

On the other hand, the transmission / reception unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, and the like on the radio frequency band signal received by the transmission / reception antenna 130.

The transmission / reception unit 120 (reception processing unit 1212) performs analog-to-digital conversion, fast Fourier transform (FFT), and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. Applying reception processing such as processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, Etc. may be obtained.

The transmission / reception unit 120 (measurement unit 123) may measure the received signal. For example, the measurement unit 123 may perform RRM (Radio Resource Management) measurement, CSI (Channel State Information) measurement, or the like based on the received signal. The measuring unit 123 receives the reception power (for example, RSRP (Reference Signal Received Power)), reception quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio, SNR (Signal to Noise Ratio)). , Signal strength (for example, RSSI (Received Signal Strength Indicator)), propagation path information (for example, CSI), and the like. The measurement result may be output to the control unit 110.

The transmission line interface 140 transmits / receives signals (backhaul signaling) to / from a device included in the core network 30 or another base station 10, and transmits user data (user plane data) for the user terminal 20; Data and the like may be obtained and transmitted.

The transmission unit and the reception unit of the base station 10 according to the present disclosure may be configured by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

Note that the transmission / reception unit 120 may receive uplink control information (UCI) in uplink control channel resources. The control unit 110 may determine a part of the uplink control information (specific UCI type, for example, SR) based on the uplink control channel resource used for reception.

(User terminal)
FIG. 7 is a diagram illustrating an example of a configuration of the user terminal according to the embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. Note that one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may be provided.

In this example, functional blocks of characteristic portions in the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

The control unit 210 controls the entire user terminal 20. The control unit 210 can be configured by a controller, a control circuit, and the like described based on common recognition in the technical field according to the present disclosure.

The control unit 210 may control signal generation, mapping, and the like. The control unit 210 may control transmission / reception and measurement using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the generated data to the transmission / reception unit 220.

The transmission / reception unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmission / reception unit 220 can be configured from a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like described based on common recognition in the technical field according to the present disclosure.

The transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit. The transmission unit may include a transmission processing unit 2211 and an RF unit 222. The receiving unit may include a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

The transmission / reception antenna 230 can be configured from an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna or the like.

The transmission / reception unit 220 may receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transmission / reception unit 220 may transmit the above-described uplink channel, uplink reference signal, and the like.

The transmission / reception unit 220 may form at least one of the transmission beam and the reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

The transmission / reception unit 220 (transmission processing unit 2211) performs processing of the PDCP layer, processing of the RLC layer (for example, RLC retransmission control), processing of the MAC layer (for example, for data, control information, and the like acquired from the control unit 210, for example). , HARQ retransmission control), etc., to generate a bit string to be transmitted.

The transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing on the bit sequence to be transmitted. , Precoding, digital-analog conversion, etc., and output a baseband signal.

Note that whether to apply the DFT processing may be based on the transform precoding setting. When transform precoding is enabled for a certain channel (for example, PUSCH), the transmission / reception unit 220 (transmission processing unit 2211) transmits the channel using the DFT-s-OFDM waveform. DFT processing may be performed as the transmission processing, or otherwise, DFT processing may not be performed as the transmission processing.

The transmission / reception unit 220 (RF unit 222) may perform modulation, filtering, amplification, and the like on the baseband signal into a radio frequency band, and transmit a signal in the radio frequency band via the transmission / reception antenna 230. .

On the other hand, the transmission / reception unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, and the like on the radio frequency band signal received by the transmission / reception antenna 230.

The transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (error correction) on the obtained baseband signal. Decoding may be included), reception processing such as MAC layer processing, RLC layer processing, and PDCP layer processing may be applied to acquire user data and the like.

The transmission / reception unit 220 (measurement unit 223) may measure the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, and the like based on the received signal. The measurement unit 223 may measure received power (for example, RSRP), received quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), channel information (for example, CSI), and the like. The measurement result may be output to the control unit 210.

The transmitting unit and the receiving unit of the user terminal 20 according to the present disclosure may be configured by at least one of the transmitting / receiving unit 220, the transmitting / receiving antenna 230, and the transmission line interface 240.

Control section 210 overlaps the timing of HARQ-ACK (Hybrid Automatic Repeat Repeat reQuest-ACKnowledge) transmission using a predetermined uplink control channel format with the timing of SR (Scheduling Request) transmission using the uplink control channel format. In this case, uplink control channel resources may be determined. The transmission / reception unit 220 may transmit at least one of the HARQ-ACK and the SR using the uplink control channel format and the uplink control channel resource.

Further, control section 210 determines one of a first uplink control channel resource for HARQ-ACK and a second uplink control channel resource for SR based on the value of SR as the uplink control channel resource. You may. The transmission / reception unit 220 may transmit the HARQ-ACK using the uplink control channel resource. The first uplink control channel resource may be different from the second uplink control channel resource (aspect 1).

Further, control section 210 determines the first uplink control channel resource from a plurality of first IDs (eg, PUCCH resource IDs for HARQ-ACK) set by higher layer signaling, and determines a plurality of first uplink control channel resources set by higher layer signaling. The second uplink control channel resource may be determined from a second ID (for example, a PUCCH resource ID for SR). The plurality of first IDs may not overlap with the plurality of second IDs (aspect 2).

Further, when the first uplink control channel resource for HARQ-ACK overlaps with the second uplink control channel resource for SR, the control unit 210 transmits the first uplink control channel resource and the second uplink control channel resource to each other. May determine one of a different third uplink control channel resource, the first uplink control channel resource, and the second uplink control channel resource as the uplink control channel resource. The transmission / reception unit 220 may transmit one of the HARQ-ACK and the SR using the uplink control channel resource (aspects 3-1 and 3-2).

Further, when the first uplink control channel resource for HARQ-ACK overlaps with the second uplink control channel resource for SR, the control unit 210 transmits the first uplink control channel resource and the second uplink control channel resource to each other. May determine one of a different third uplink control channel resource (for example, a specific PUCCH resource), the first uplink control channel resource, and the second uplink control channel resource as the uplink control channel resource. . The transmission / reception unit 220 may transmit the HARQ-ACK and the SR using the uplink control channel resource (aspect 3-3).

(Hardware configuration)
Note that the block diagram used in the description of the above-described embodiment shows blocks in functional units. These functional blocks (components) are realized by an arbitrary combination of at least one of hardware and software. In addition, a method of implementing each functional block is not particularly limited. That is, each functional block may be realized using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated from each other). , Wired, wireless, etc.), and may be implemented using these multiple devices. The functional block may be realized by combining one device or the plurality of devices with software.

Here, the functions include judgment, determination, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. Not limited. For example, a functional block (configuration unit) that causes transmission to function may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like. In any case, as described above, the realization method is not particularly limited.

For example, a base station, a user terminal, or the like according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method according to the present disclosure. FIG. 8 is a diagram illustrating an example of a hardware configuration of the base station and the user terminal according to the embodiment. The above-described base station 10 and user terminal 20 may be physically 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 present disclosure, the terms such as “apparatus”, “circuit”, “device”, “section”, and “unit” can be read interchangeably. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices illustrated in the drawing, or may be configured to exclude some of the devices.

For example, although only one processor 1001 is illustrated, there may be multiple processors. Further, the processing may be executed by one processor, or the processing may be executed by two or more processors simultaneously, sequentially, or by using another method. Note that the processor 1001 may be implemented by one or more chips.

The functions of the base station 10 and the user terminal 20 are performed, for example, by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002 so that the processor 1001 performs an arithmetic operation and communicates via the communication device 1004. And controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, at least a part of the control unit 110 (210), the transmitting / receiving unit 120 (220), and the like may be realized by the processor 1001.

The processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to 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 operation described in the above embodiment is used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks may be similarly realized.

The memory 1002 is a computer-readable recording medium, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically EPROM), RAM (Random Access Memory), and other appropriate storage media. It may be constituted by one. The memory 1002 may be called 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, and the like that can be executed to implement the wireless communication method according to an embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc) ROM, etc.), a digital versatile disc, At least one of a Blu-ray (registered trademark) disk, a removable disk, a hard disk drive, a smart card, a flash memory device (eg, a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. May be configured. The storage 1003 may be called an auxiliary storage device.

The communication device 1004 is hardware (transmission / reception device) for performing communication 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 a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). May be configured. For example, the transmission / reception unit 120 (220) and the transmission / reception antenna 130 (230) described above may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be physically or logically separated from the transmission unit 120a (220a) and the reception unit 120b (220b).

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an external input. The output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, an LED (Light Emitting Diode) lamp, and the like). Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

The devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using a different bus for each device.

In addition, the base station 10 and the user terminal 20 include hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include hardware, and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

(Modification)
Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meaning. For example, channels, symbols and signals (signals or signaling) may be read interchangeably. Also, the signal may be a message. The reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like according to an applied standard. A component carrier (CC: Component Carrier) may be called a cell, a frequency carrier, a carrier frequency, or the like.

A radio frame may be configured by one or more periods (frames) in the time domain. The one or more respective periods (frames) forming the radio frame may be referred to as a subframe. Further, a subframe may be configured by one or more slots in the time domain. The subframe may be of a fixed length of time (eg, 1 ms) that does not depend on numerology.

Here, the new melology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology includes, for example, subcarrier interval (SCS: SubCarrier @ Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission @ Time @ Interval), number of symbols per TTI, radio frame configuration, transmission and reception. At least one of a specific filtering process performed by the transceiver in the frequency domain and a specific windowing process performed by the transceiver in the time domain may be indicated.

The slot may be configured by one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain. Further, the slot may be a time unit based on numerology.

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

Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may have different names corresponding to each. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be interchanged with each other.

For example, one subframe may be called a TTI, a plurality of consecutive subframes may be called a TTI, and one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1 to 13 symbols), or a period longer than 1 ms. It may be. Note that the unit representing the TTI may be called a slot, a minislot, or the like instead of a subframe.

Here, the TTI refers to, for example, a minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling for allocating radio resources (frequency bandwidth, transmission power, and the like that can be used in each user terminal) to each user terminal in TTI units. Note that 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 and link adaptation. Note that when a TTI is given, a time section (for example, the number of symbols) in which a transport block, a code block, a codeword, and the like are actually mapped may be shorter than the TTI.

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

A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in 3GPP@Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, and the like. A TTI shorter than the normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.

Note that a long TTI (for example, a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (for example, a shortened TTI, etc.) may be replaced with a TTI shorter than the long TTI and 1 ms. The TTI having the above-described TTI length may be replaced with the TTI.

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

Ｒ Also, the RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, and the like may each be configured by one or a plurality of resource blocks.

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

{Also, a resource block may be composed of one or more resource elements (RE: Resource @ Element). For example, one RE may be a radio resource area of one subcarrier and one symbol.

A bandwidth part (BWP: Bandwidth @ Part) (which may be referred to as a partial bandwidth or the like) may also represent a subset of consecutive common RBs (common @ resource @ blocks) for a certain numerology in a certain carrier. Good. Here, the common RB may be specified by an index of the RB based on the common reference point of the carrier. A PRB may be defined by a BWP and numbered within the BWP.

$ BWP may include a BWP for UL (UL @ BWP) and a BWP for DL (DL @ BWP). For a UE, one or more BWPs may be configured in one carrier.

少なくとも At least one of the configured BWPs may be active, and the UE does not have to assume to transmit and receive a given signal / channel outside the active BWP. Note that “cell”, “carrier”, and the like in the present disclosure may be replaced with “BWP”.

The structures of the above-described radio frame, subframe, slot, minislot, symbol, and the like are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, included in an RB The configuration of the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP: Cyclic Prefix) length, and the like can be variously changed.

Further, the information, parameters, and the like described in the present disclosure may be expressed using an absolute value, may be expressed using a relative value from a predetermined value, or may be expressed using another corresponding information. May be represented. For example, a radio resource may be indicated by a predetermined index.

名称 Names used for parameters and the like in the present disclosure are not limited in any respect. Further, the formulas and the like using these parameters may be different from those explicitly disclosed in the present disclosure. The various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements can be identified by any suitable name, so the various names assigned to these various channels and information elements Is not a limiting name in any way.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., that can be referred to throughout the above description are not limited to voltages, currents, electromagnetic waves, magnetic or magnetic particles, optical or photons, or any of these. May be represented by a combination of

情報 In addition, information, signals, and the like can be output from the upper layer to at least one of the lower layer and the lower layer to the upper layer. Information, signals, etc. may be input / output via a plurality of network nodes.

(4) Information and signals input and output may be stored in a specific place (for example, a memory) or may be managed using a management table. Information and signals that are input and output can be overwritten, updated, or added. The output information, signal, and the like may be deleted. The input information, signal, and the like may be transmitted to another device.

Notification of information is not limited to the aspect / embodiment described in the present disclosure, and may be performed using another method. For example, information notification in the present disclosure includes physical layer signaling (for example, downlink control information (DCI: Downlink Control Information), uplink control information (UCI: Uplink Control Information)), and upper layer signaling (for example, RRC (Radio Resource Control). ) Signaling, broadcast information (master information block (MIB: Master Information Block), system information block (SIB: System Information Block), etc.), MAC (Medium Access Control) signaling), other signals or a combination thereof. Is also good.

Note that the physical layer signaling may be called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like. The RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like. Also, the MAC signaling may be notified using, for example, a MAC control element (MAC @ CE (Control @ Element)).

Further, the notification of the predetermined information (for example, the notification of “X”) is not limited to an explicit notification, and is implicit (for example, by not performing the notification of the predetermined information or by another information). May be performed).

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

Software, regardless of whether it is called software, firmware, middleware, microcode, a hardware description language, or any other name, instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules , Applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

ソフトウェア Also, software, instructions, information, and the like may be transmitted and received via a transmission medium. For example, if 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.), the website, When transmitted from a server or other remote source, at least one of these wired and / or wireless technologies is included within the definition of a transmission medium.

用語 The terms “system” and “network” as used in this disclosure may be used interchangeably. “Network” may mean a device (eg, a base station) included in the network.

In the present disclosure, “precoding”, “precoder”, “weight (precoding weight)”, “quasi-co-location (QCL)”, “TCI state (Transmission Configuration Indication state)”, “spatial relation” (Spatial relation), "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", " Terms such as "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel" are interchangeable Can be used for

In the present disclosure, “base station (BS: Base @ Station)”, “wireless base station”, “fixed station (fixed @ station)”, “NodeB”, “eNodeB (eNB)”, “gNodeB (gNB)”, “gNodeB (gNB)” "Access point (access @ point)", "transmission point (TP: Transmission @ Point)", "reception point (RP: Reception @ Point)", "transmission / reception point (TRP: Transmission / Reception @ Point)", "panel", "cell" , "Sector", "cell group", "carrier", "component carrier" and the like may be used interchangeably. A base station may also be referred to as a macro cell, a small cell, a femto cell, a pico cell, or the like.

A base station can accommodate one or more (eg, three) cells. If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH: Communication services can also be provided by Remote Radio Head)). The term "cell" or "sector" refers to part or all of the coverage area of at least one of a base station and a base station subsystem that provides communication services in this coverage.

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

A mobile station is a 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.

少なくとも At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like. Note that at least one of the base station and the mobile station may be a device mounted on the mobile unit, the mobile unit itself, or the like. The moving object may be a vehicle (for example, a car, an airplane, or the like), may be an unmanned moving object (for example, a drone, an autonomous vehicle), or may be a robot (maned or unmanned). ). Note that at least one of the base station and the mobile station includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

基地 Also, the base station in the present disclosure may be replaced with a user terminal. For example, communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration. In this case, the configuration may be such that the user terminal 20 has the function of the base station 10 described above. Further, words such as “up” and “down” may be read as words corresponding to communication between terminals (for example, “side”). For example, an uplink channel, a downlink channel, and the like may be replaced with a side channel.

Similarly, a user terminal in the present disclosure may be replaced by a base station. In this case, a configuration in which the base station 10 has the function of the user terminal 20 described above may be adopted.

In the present disclosure, the operation performed by the base station may be performed by an upper node (upper node) in some cases. In a network including one or more network nodes having a base station (network @ nodes), various operations performed for communication with a terminal include a base station, one or more network nodes other than the base station (eg, Obviously, it can be performed by MME (Mobility Management Entity), S-GW (Serving-Gateway) or the like, but not limited thereto, or a combination thereof.

各 Each aspect / embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching with execution. In addition, the processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in the present disclosure may be interchanged in order as long as there is no inconsistency. For example, for the methods described in this disclosure, elements of various steps are presented in an exemplary order, and are not limited to the specific order presented.

Each aspect / embodiment described in the present disclosure is applicable to LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication). system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (Registered trademark) (Global System for Mobile Communications), 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) , A system using other appropriate wireless communication methods, and a next-generation system extended based on these methods. Further, a plurality of systems may be combined (for example, a combination of LTE or LTE-A and 5G) and applied.

記載 The term “based on” as used in the present disclosure does not mean “based on” unless otherwise indicated. In other words, the phrase "based on" means both "based only on" and "based at least on."

いかなる Any reference to elements using designations such as "first," "second," etc., as used in this disclosure, does not generally limit the quantity or order of those elements. These designations may be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not mean that only two elements can be employed or that the first element must precede the second element in any way.

用語 The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, “judgment (decision)” means judging, calculating, computing, processing, deriving, investigating, searching (upping, searching, inquiry) ( For example, a search in a table, database, or another data structure), ascertaining, etc., may be regarded as "deciding".

Also, “determining” includes receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), and access ( accessing) (e.g., accessing data in a memory) or the like.

Also, “judgment (decision)” is regarded as “judgment (decision)” of resolving, selecting, selecting, establishing, comparing, etc. Is also good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of any operation.

判断 Also, “judgment (decision)” may be read as “assuming”, “expecting”, “considering”, or the like.

The “maximum transmission power” described in the present disclosure may mean the maximum value of the transmission power, may mean the nominal maximum transmission power (the nominal UE maximum transmit power), or may refer to the rated maximum transmission power (the rated UE maximum transmit power).

As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements. And may include the presence of one or more intermediate elements between two elements "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.

In this disclosure, where two elements are connected, using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-exhaustive examples, the radio frequency domain, microwave It can be considered to be "connected" or "coupled" to each other using electromagnetic energy having a wavelength in the region, light (both visible and invisible) regions, and the like.

において In the present disclosure, the term “A and B are different” may mean that “A and B are different from each other”. The term may mean that “A and B are different from C”. Terms such as "separate", "coupled" and the like may be interpreted similarly to "different".

Where the terms “include”, “including” and variations thereof are used in the present disclosure, these terms are as inclusive as the term “comprising” Is intended. Further, the term "or" as used in the present disclosure is not intended to be an exclusive or.

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

Although the invention according to the present disclosure has been described in detail above, it is obvious to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modifications and changes without departing from the spirit and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is intended for illustrative purposes and does not bring any restrictive meaning to the invention according to the present disclosure.

Claims

If the timing of HARQ-ACK (Hybrid Automatic Repeat reQuest-ACKnowledge) transmission using a predetermined uplink control channel format and the timing of SR (Scheduling Request) transmission using the uplink control channel format overlap, the uplink control channel resource A control unit for determining
A user terminal, comprising: a transmission unit that transmits at least one of the HARQ-ACK and the SR using the uplink control channel format and the uplink control channel resource.
The control unit determines one of a first uplink control channel resource for HARQ-ACK and a second uplink control channel resource for SR based on the value of SR as the uplink control channel resource,
The transmitting unit transmits the HARQ-ACK using the uplink control channel resource,
The user terminal according to claim 1, wherein the first uplink control channel resource is different from the second uplink control channel resource.
The control unit determines the first uplink control channel resource from a plurality of first IDs set by higher layer signaling, and determines the second uplink control channel resource from a plurality of second IDs set by upper layer signaling. ,
The user terminal according to claim 2, wherein the plurality of first IDs do not overlap with the plurality of second IDs.
When the first uplink control channel resource for HARQ-ACK overlaps with the second uplink control channel resource for SR, the control unit is different from the first uplink control channel resource and the second uplink control channel resource. Determining one of a third uplink control channel resource, the first uplink control channel resource, and the second uplink control channel resource as the uplink control channel resource;
The user terminal according to claim 1, wherein the transmitting unit transmits one of the HARQ-ACK and the SR using the uplink control channel resource.
When the first uplink control channel resource for HARQ-ACK overlaps with the second uplink control channel resource for SR, the control unit is different from the first uplink control channel resource and the second uplink control channel resource. Determining one of a third uplink control channel resource, the first uplink control channel resource, and the second uplink control channel resource as the uplink control channel resource;
The user terminal according to claim 1, wherein the transmitting unit transmits the HARQ-ACK and the SR using the uplink control channel resource.
If the timing of HARQ-ACK (Hybrid Automatic Repeat reQuest-ACKnowledge) transmission using a predetermined uplink control channel format and the timing of SR (Scheduling Request) transmission using the uplink control channel format overlap, the uplink control channel resource Determining the
Transmitting at least one of the HARQ-ACK and the SR using the uplink control channel format and the uplink control channel resource.