Communication device, base station device, and communication method

Abstract

To provide user equipment, a base station, and a communication method capable of appropriately controlling radio resources used for uplink transmission when frequency bands of user equipment with different communication capabilities coexist.MEANS FOR SOLVING THE PROBLEM: User equipment (100) includes: a receiving unit (121) that receives, from a base station (200), first information indicating at least one of a first PUCCH setting, a frequency position, and a size, and second information indicating at least one of the frequency position and the size; a control unit (140) that identifies an initial uplink bandwidth portion based on the first information; and a transmitting unit (122) that transmits uplink control information using resources of a physical uplink control channel to which frequency hopping is applied. The control unit (140) determines the resources of the physical uplink control channel to which frequency hopping is applied, based on the first PUCCH setting and the second information.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a user equipment, a base station, and a communication method for use in a mobile communication system. [Background technology]

[0002] In recent years, the 3GPP (3rd Generation Partnership Project), a standardization project for mobile communication systems, has been considering providing specific user equipment having reduced communication capabilities compared to general user equipment in a 5G system. The specific user equipment is a user equipment having a mid-range performance and price for IoT (Internet of Things), and, for example, the maximum bandwidth of the bandwidth portion used for wireless communication is set narrower and the number of receivers is smaller than that of general user equipment.

[0003] It is being considered to operate specific user equipment in the same frequency band as general user equipment. In this way, by allowing general user equipment and specific user equipment to operate in the same frequency band, it becomes possible to operate frequencies efficiently.

[0004] Non-patent document 1 proposes that when frequency bands of a general user equipment and a specific user equipment are made to coexist, the bandwidth portion of the specific user equipment is arranged toward the end in the frequency direction of the bandwidth portion in which the PUCCH resource of the general user equipment is arranged, so that the PUCCH resource of the general user equipment is not divided in the frequency direction by the PUCCH resource used to transmit the PUCCH of the specific user equipment. [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] 3GPP contribution “R1-2104283” Summary of the Invention [Problem to be solved by the invention]

[0006] When frequency bands of user equipment with different communication capabilities, such as general user equipment and specific user equipment, are allowed to coexist, a method for appropriately controlling radio resources used for uplink transmission is desired.

[0007] Therefore, an object of the present invention is to provide a user device, a base station, and a communication method that enable appropriate control of radio resources used for uplink transmission when frequency bands of user devices with different communication capabilities coexist. [Means for solving the problem]

[0008] A user device according to a first aspect includes a receiver (121) for receiving from a base station (200) a first PUCCH setting, first information indicating at least one of a frequency location and a size, and second information indicating at least one of a frequency location and a size, a controller (140) for specifying an initial uplink bandwidth portion based on the first information, and a transmitter (122) for transmitting uplink control information using a resource of a physical uplink control channel to which frequency hopping is applied. The controller (140) determines a resource of the physical uplink control channel to which frequency hopping is applied based on the first PUCCH setting and the second information.

[0009] A base station according to a second aspect includes a transmitter (222) that transmits a first PUCCH setting, first information indicating a frequency location and a size, and second information indicating a frequency location and / or a size to a user device (100, 100B), a controller (240) that specifies an initial uplink bandwidth portion based on the first information, and a receiver (221) that receives uplink control information using a resource of a physical uplink control channel to which frequency hopping is applied. The controller (240) determines a resource of the physical uplink control channel to which frequency hopping is applied based on the first PUCCH setting and the second information.

[0010] A communication method according to a third aspect is a communication method executed by a user device (100). The communication method includes a step of receiving, from a base station (200), a first information indicating at least one of a first PUCCH configuration, a frequency location and a size, and a second information indicating at least one of a frequency location and a size, a step of identifying an initial uplink bandwidth portion based on the first information, a step of transmitting uplink control information using a resource of a physical uplink control channel to which frequency hopping is applied, and a step of determining a resource of the physical uplink control channel to which frequency hopping is applied based on the first PUCCH configuration and the second information.

[0011] A communication method according to a fourth aspect is a communication method executed by a base station (200). The communication method includes a step of transmitting a first PUCCH setting, first information indicating a frequency location and / or a size, and second information indicating a frequency location and / or a size to a user device (100, 100B), a step of identifying an initial uplink bandwidth portion based on the first information, a step of receiving uplink control information using a resource of a physical uplink control channel to which frequency hopping is applied, and a step of determining a resource of the physical uplink control channel to which the frequency hopping is applied based on the first PUCCH setting and the second information. Effect of the Invention

[0012] According to one aspect of the present invention, it is possible to provide a user device, a base station, and a communication method that are capable of appropriately controlling radio resources used for uplink transmission when frequency bands for user devices with different communication capabilities coexist. [Brief description of the drawings]

[0013] [Figure 1] 1 is a diagram showing a configuration of a mobile communication system according to an embodiment. [Diagram 2] FIG. 2 is a diagram illustrating an example of the configuration of a protocol stack according to the embodiment. [Diagram 3] FIG. 2 is a diagram showing the configuration of a UE according to an embodiment. [Figure 4] FIG. 2 is a diagram illustrating a configuration of a base station according to an embodiment. [Diagram 5] FIG. 2 is a sequence diagram for explaining a first operation example of the mobile communication system according to the embodiment. [Figure 6] FIG. 2 is an explanatory diagram for explaining a first operation example of the mobile communication system according to the embodiment. [Figure 7] FIG. 11 is a sequence diagram for explaining a second operation example of the mobile communication system according to the embodiment. [Figure 8] FIG. 11 is an explanatory diagram for explaining a second operation example of the mobile communication system according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] A mobile communication system according to an embodiment will be described with reference to the drawings. In the description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

[0015] (System Configuration) First, the configuration of a mobile communication system 1 according to this embodiment will be described with reference to Fig. 1. The mobile communication system 1 is, for example, a system that complies with the 3GPP Technical Specification (TS). In the following, the mobile communication system 1 will be described by taking as an example a 3GPP standard 5th Generation System (5G system), that is, a mobile communication system based on NR (New Radio).

[0016] The mobile communication system 1 includes a network 10 and a user equipment (UE) 100 that communicates with the network 10. The network 10 includes a next generation radio access network (NG-RAN) 20 that is a 5G radio access network, and a 5G core network (5GC) 30 that is a 5G core network.

[0017] The UE 100 is a device used by a user. The UE 100 is a mobile device such as a mobile phone terminal such as a smartphone, a tablet terminal, a notebook PC, a communication module, or a communication card. The UE 100 may be a vehicle (e.g., a car, a train, etc.) or a device provided therein. The UE 100 may be a transport body other than a vehicle (e.g., a ship, an airplane, etc.) or a device provided therein. The UE 100 may be a sensor or a device provided therein. The UE 100 may be called by another name such as a mobile station, a mobile terminal, a mobile device, a mobile unit, a subscriber station, a subscriber terminal, a subscriber device, a subscriber unit, a wireless station, a wireless terminal, a wireless device, a wireless unit, a remote station, a remote terminal, a remote device, or a remote unit.

[0018] In this embodiment, two types of UEs are assumed as the NR UE 100: a general UE (general user equipment) 100A and a specific UE (specific user equipment) 100B having reduced communication capabilities compared to the general UE 100A. The general UE 100A has advanced communication capabilities such as enhanced Mobile Broadband (eMBB) and Ultra-Reliable and Low Latency Communications (URLLC), which are characteristics of NR. Therefore, the general UE 100A has higher communication capabilities than the specific UE 100B. The specific UE 100B is a UE with reduced device cost and complexity compared to the general UE 100A. The specific UE 100B is a UE 100 with middle-range performance and price for IoT, and, for example, the maximum bandwidth used for wireless communication is set narrower and the number of receivers is smaller compared to the general UE 100A. The receiver may be referred to as a receiving branch. The specific UE 100B may be referred to as a reduced capability NR device or a RedCap UE. Hereinafter, for clarity of explanation, it will also be described as a general UE or a specific UE, but the general UE or the specific UE in this embodiment is a UE. That is, the general UE in this embodiment may be replaced with a UE. Also, the specific UE in this embodiment may be replaced with a UE.

[0019] Specifically, the specific UE 100B may be capable of communication at a communication speed equal to or higher than a communication speed specified in an LPWA (Low Power Wide Area) standard, for example, LTE Cat.1 / 1bis, LTE Cat.M1 (LTE-M), or LTE Cat.NB1 (NB-IoT). The specific UE 100B may be capable of communication at a bandwidth equal to or higher than a bandwidth specified in the LPWA standard. The specific UE 100B may have a limited bandwidth used for communication, compared with a UE of Rel-15 or Rel-16. For example, for FR1 (Frequency Range 1), the maximum bandwidth (also referred to as UE maximum bandwidth) supported by the specific UE 100B may be 20 MHz. Also, for FR2 (Frequency Range 2), the maximum bandwidth supported by the specific UE 100B may be 100 MHz. The specific UE 100B may have only one receiver that receives a wireless signal. The specific UE 100B may be, for example, a wearable device or a sensor device.

[0020] The NG-RAN 20 includes a plurality of base stations 200. Each base station 200 manages at least one cell. A cell constitutes the smallest unit of a communication area. One cell belongs to one frequency (carrier frequency). The term "cell" may represent a wireless communication resource, and may represent a communication target of the UE 100. Each base station 200 can perform wireless communication with the UE 100 located in its own cell. The base station 200 communicates with the UE 100 using a protocol stack of the RAN. Details of the protocol stack will be described later. The base station 200 is connected to other base stations 200 (which may be referred to as adjacent base stations) via an Xn interface. The base station 200 communicates with the adjacent base stations via an Xn interface. The base station 200 provides NR user plane and control plane protocol terminations toward the UE 100, and is connected to the 5GC 30 via an NG interface. Such an NR base station 200 may be referred to as a gNodeB (gNB).

[0021] The 5GC 30 includes a core network device 300. The core network device 300 includes, for example, an Access and Mobility Management Function (AMF) and / or a User Plane Function (UPF). The AMF performs mobility management of the UE 100. The UPF provides a function specialized for U-plane processing. The AMF and the UPF are connected to the base station 200 via an NG interface.

[0022] (Example of protocol stack configuration) Next, with reference to FIG. 2, an example of the configuration of a protocol stack according to this embodiment will be described.

[0023] The protocol of the wireless section between the UE 100 and the base station 200 includes a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, and an RRC layer.

[0024] The PHY layer performs encoding / decoding, modulation / demodulation, antenna mapping / demapping, and resource mapping / demapping. Data and control information are transmitted between the PHY layer of the UE 100 and the PHY layer of the base station 200 via a physical channel.

[0025] The MAC layer performs data priority control, retransmission processing using hybrid ARQ (HARQ), random access procedures, etc. Data and control information are transmitted between the MAC layer of the UE 100 and the MAC layer of the base station 200 via a transport channel. The MAC layer of the base station 200 includes a scheduler. The scheduler determines the uplink and downlink transport format (transport block size, modulation and coding scheme (MCS)) and the resources to be allocated to the UE 100.

[0026] The RLC layer transmits data to the RLC layer on the receiving side by using the functions of the MAC layer and the PHY layer. Data and control information are transmitted between the RLC layer of the UE 100 and the RLC layer of the base station 200 via logical channels.

[0027] The PDCP layer performs header compression / decompression and encryption / decryption.

[0028] A Service Data Adaptation Protocol (SDAP) layer may be provided above the PDCP layer. The Service Data Adaptation Protocol (SDAP) layer maps IP flows, which are units for QoS control by the core network, to radio bearers, which are units for QoS control by the access stratum (AS).

[0029] The RRC layer controls logical channels, transport channels, and physical channels according to the establishment, re-establishment, and release of radio bearers. RRC signaling for various settings is transmitted between the RRC layer of the UE 100 and the RRC layer of the base station 200. When there is an RRC connection between the RRC of the UE 100 and the RRC of the base station 200, the UE 100 is in an RRC connected state. When there is no RRC connection between the RRC of the UE 100 and the RRC of the base station 200, the UE 100 is in an RRC idle state. When the RRC connection between the RRC of the UE 100 and the RRC of the base station 200 is suspended, the UE 100 is in an RRC inactive state.

[0030] The NAS layer, which is located above the RRC layer in the UE 100, performs session management and mobility management for the UE 100. NAS signaling is transmitted between the NAS layer of the UE 100 and the NAS layer of the core network device 300.

[0031] In addition, the UE 100 has an application layer and the like in addition to the protocol of the radio interface.

[0032] (Radio frame structure) In the 5G system, downlink transmission and uplink transmission are configured within a radio frame of 10 ms duration. For example, a radio frame is configured with 10 subframes. For example, one subframe may be 1 ms. Also, one subframe may be configured with one or more slots. For example, the number of symbols constituting one slot is 14 in a normal CP (Cyclic Prefix) and 12 in an extended CP. Also, the number of slots constituting one subframe changes according to the set subcarrier interval. For example, for a normal CP, when the subcarrier interval is set to 15 kHz, the number of slots per subframe is 1 (i.e., 14 symbols), when the subcarrier interval is set to 30 kHz, the number of slots per subframe is 2 (i.e., 28 symbols), when the subcarrier interval is set to 60 kHz, the number of slots per subframe is 4 (i.e., 56 symbols), and when the subcarrier interval is set to 120 kHz, the number of slots per subframe is 8 (i.e., 128 symbols). Furthermore, when 60 kHz is set as the subcarrier spacing for the extended CP, the number of slots per subframe is 4 (i.e., 48 symbols). That is, the number of slots constituting one subframe is determined based on the subcarrier spacing set by base station 200. Also, the number of symbols constituting one subframe is determined based on the subcarrier spacing set by base station 200. That is, the number of symbols constituting a 1 ms subframe is determined based on the subcarrier spacing set by base station 200, and the length of each symbol (length in the time direction) changes.

[0033] (Bandwidth part) The UE 100 and the base station 200 communicate using a bandwidth portion (BWP) that is a part of the total bandwidth of the cell. Specifically, the base station 200 sets one or more BWPs to the UE 100. The base station 200 can notify the UE 100 of a BWP (i.e., an active BWP) to be used for communication with the base station 200 among the set one or more BWPs. Specifically, the base station 200 can transmit to the UE 100 an identifier indicating a BWP to be activated when setting is performed, that is, a BWP to be used first for communication with the base station 200. In addition, for control of switching from an active BWP to a BWP that is not an active BWP (hereinafter, an inactive BWP) and switching from an inactive BWP to an active BWP (so-called BWP switching), for example, a physical downlink control channel (e.g., a downlink assignment, an uplink assignment), a timer (i.e., a bwp-InactivityTimer), an RRC signaling, or a MAC entity is used.

[0034] Here, communication in a BWP (i.e., an active BWP) refers to transmission on an uplink shared channel (UL-SCH) in the BWP, transmission on a random access channel (RACH) in the BWP, and transmission on a random access channel (RACH) in the BWP. s The BWP may include at least one of transmission on a Physical Random Access Channel (PRACH) (if a Physical RACH (PRACH) opportunity is configured), monitoring a Physical Downlink Control Channel (PDCCH) in the BWP, transmission on a Physical Uplink Control Channel (PUCCH) in the BWP (if a PUCCH resource is configured), reporting Channel State Information (CSI) for the BWP, and receiving a Downlink Shared Channel (DL-SCH) in the BWP.

[0035] Here, the UL-SCH is a transport channel and is mapped to a Physical Uplink Shared Channel (PUSCH), which is a physical channel. Data transmitted on the UL-SCH is also referred to as UL-SCH data. For example, the UL-SCH data may correspond to uplink user data. The DL-SCH is a transport channel and is mapped to a Physical Downlink Shared Channel (PDSCH), which is a physical channel. ys The data transmitted on the DL-SCH is also referred to as DL-SCH data. For example, the DL-SCH data may correspond to downlink user data.

[0036] Moreover, the PUCCH is used to transmit uplink control information. For example, the uplink control information includes a Hybrid Automatic Repeat Request (HARQ-ACK), CSI, and / or a Scheduling Request (SR). The HARQ-ACK includes a Positive Acknowledgment or a Negative Acknowledgment. For example, the PUCCH is used to transmit a HARQ-ACK for a PDSCH (i.e., DL-SCH (DL-SCH data, downlink user data)). Here, the DL-SCH data and / or the downlink user data are also referred to as a downlink transport block.

[0037] The BWP includes an initial bandwidth portion (Initial BWP) and a bandwidth portion (dedicated BWP) set exclusively for each UE 100. The initial BWP is used for at least initial access of the UE 100. The initial BWP is used commonly for a plurality of UEs 100. For example, the initial BWP is set using parameters (cell-specific parameters) common to a plurality of UEs 100. The initial BWP includes an initial BWP for downlink communication (hereinafter, initial downlink BWP (Initial DL BWP)) and an initial BWP for uplink communication (hereinafter, initial uplink BWP (Initial UL BWP)). For example, the value of an identifier (i.e., bwp-id) indicating each of the initial downlink BWP and the initial uplink BWP may be 0.

[0038] The UE 100 can specify the initial BWP (i.e., the initial downlink BWP and the initial uplink BWP) in, for example, two ways. In the first way, the UE 100 specifies the initial BWP based on CORESET#0 set using information included in a master information block (MIB) in a physical broadcast channel (PBCH). In the second way, the UE 100 specifies the initial BWP based on a position and a bandwidth in the frequency domain set using information included in a system information block (SIB). The UE 100 may apply the BWP specified by the first way to communication with the base station 200, for example, until reception of a message 4 in the random access procedure. The UE 100 may apply the BWP specified by the second way to communication with the base station 200, for example, after reception of a message 4 (Msg.4). Here, the message 4 in the random access procedure may include an RRC setup message, an RRC resumption message, and / or an RRC (re)establishment message.

[0039] The dedicated BWP is set exclusively for the UE 100. The dedicated BWP includes a dedicated BWP for downlink communication (hereinafter, a dedicated downlink BWP (UE dedicated DL BWP)) and a dedicated BWP for uplink communication (hereinafter, a dedicated uplink BWP (UE dedicated UL BWP)). For example, the value of an identifier indicating each of the dedicated downlink BWP and the dedicated uplink BWP may be other than 0.

[0040] A dedicated BWP is configured in UE100 based on, for example, information included in an RRC message (e.g., information for a downlink BWP (i.e., BWP-Downlink) and information for an uplink BWP (i.e., BWP-Uplink)). Each of the information for the downlink BWP and the information for the dedicated uplink BWP may include, for example, at least one of information indicating a location and a bandwidth in the frequency domain (e.g., locationAndBadwidth), information indicating a subcarrier spacing (e.g., subcarrierSpacing), and information indicating an extended cyclic prefix (e.g., cyclicPrefix).

[0041] (Resource Block) A resource block (RB) is defined as 12 consecutive subcarriers in the frequency domain. For example, a common resource block (CRB), a physical resource block (PRB), etc. are defined as RBs. The common resource blocks are numbered in ascending order starting from 0 in the frequency domain with a subcarrier spacing setting μ. The physical resource blocks (PRBs) with a subcarrier spacing setting μ are defined within the bandwidth portion and numbered from 0 to the following numbers (PRB numbers to be described later). Hereinafter, the PRB numbers are also referred to as PRB indexes. That is, in this embodiment, the PRB numbers and the PRB indexes may be the same.

number

[0042] Moreover, the relationship between the common resource block and the physical resource block is given by the following equation.

number

[0043] (PUCCH Resources) For example, when UE100 receives the first PUCCH configuration information but does not receive the second PUCCH configuration information, UE100 determines the PUCCH resource in the initial uplink BWP based on predefined information. Here, when UE100 receives the first PUCCH configuration information and / or the second PUCCH configuration information, it may include a case where UE100 has (i.e., holds) the first PUCCH configuration information and / or the second PUCCH configuration information. Also, when UE100 does not receive the first PUCCH configuration information and / or the second PUCCH configuration information, it may include a case where UE100 does not have (i.e., does not hold) the first PUCCH configuration information and / or the second PUCCH configuration information. Hereinafter, when UE100 receives the first PUCCH configuration information but does not receive the second PUCCH configuration information, it is also referred to as the first case.

[0044] For example, the first PUCCH configuration information is PUCCH configuration common information (pucch-ConfigCommon). That is, the first PUCCH configuration information is a cell-specific parameter of the PUCCH. Also, for example, the second PUCCH configuration information is PUCCH configuration information (PUCCH-Config). That is, the second PUCCH configuration information is a UE-specific parameter of the PUCCH.

[0045] For example, an index (e.g., an index from 0 to 15) may be associated with each of a plurality of PUCCH resources (e.g., 16 PUCCH resources), and a certain PUCCH resource may be indicated by specifying the index using the first PUCCH configuration information. Here, each of the plurality of PUCCH resources may include at least one of a PUCCH format, a first symbol used for the PUCCH, a period (number of symbols) used for the PUCCH, a PRB offset, and an initial CS (cyclic shift) index.

[0046] For example, in the first case, the UE 100 may determine the index by the following formula: In addition, the UE 100 determines the PUCCH resource based on the determined index.

number

[0047] Also, in the first case, UE 100 may determine whether or not Equation 1 and Equation 2 are satisfied. When PUCCH resources are provided by PUCCH resource common information and either Equation 1 or Equation 2 is satisfied, UE 100 determines a PRB index of a PUCCH resource hopping in the frequency direction. That is, UE 100 determines a PRB index of one or more PUCCH resources used for frequency hopping applied to PUCCH transmission.

number

[0048] For example, when Equation 1 is satisfied, UE 100 determines a PRB index of a PUCCH resource (first PUCCH resource) used for the first hop and a PRB index of a PUCCH resource (second PUCCH resource) used for the second hop by the following equation. Here, the size of the initial uplink BWP in "Equation 5" may correspond to the size of the bandwidth portion i in "Equation 1". That is, the PRB of the initial uplink BWP in "Equation 5" may correspond to the number (index) of the PRB.

number

[0049] Furthermore, when Equation 2 is satisfied, UE 100 determines a PRB index of a PUCCH resource (first PUCCH resource) used for the first hop and a PRB index of a PUCCH resource (second PUCCH resource) used for the second hop by the following equation.

number

[0050] In addition, UE 100 may determine the initial CS index within the set of initial CS indexes according to the following formula.

number

[0051] Furthermore, when UE 100 receives the second PUCCH configuration information, it determines the PUCCH resource based on the second PUCCH configuration information. That is, when UE 100 receives the second PUCCH configuration information, it may determine the PUCCH resource based on the second PUCCH configuration information regardless of whether or not it receives the first PUCCH configuration information. Hereinafter, the case where UE 100 at least receives the second PUCCH configuration information (that is, has the second PUCCH configuration information) is also referred to as the second case.

[0052] For example, the second PUCCH configuration information may include at least one of PUCCH resource set information (PUCCH-ResourceSet), a PUCCH resource identifier (pucch-ResourceId), starting PRB information (startingPRB), second hop PRB information (secondHopPRB), and intra-slot frequency hopping information (intraSlotFrequencyHopping). For example, the PUCCH resource set information indicates a PUCCH resource set. The PUCCH resource identifier indicates a PUCCH resource index. The PUCCH resource set is associated with a PUCCH resource index. The starting PRB information indicates a first PRB index before frequency hopping or without frequency hopping. The second hop PRB information indicates a first PRB index after frequency hopping. The intra-slot frequency hopping information indicates whether intra-slot frequency hopping is enabled or disabled. That is, in the second case, the UE 100 may determine a PUCCH resource (PRB index of the PUCCH resource) to be applied for PUCCH transmission based on the starting PRB information and / or the second-hop PRB information.

[0053] For example, in the second case, a plurality of PUCCH resource sets may be configurable for UE 100. For example, UE 100 determines a PUCCH resource set to be used for PUCCH transmission based on PUCCH resource set information and a PUCCH resource identifier. Also, UE 100 determines a first PRB (i.e., a PRB index of a PUCCH resource) before frequency hopping or without frequency hopping based on start PRB information. Also, UE 100 determines a first PRB (i.e., a PRB index of a PUCCH resource) after frequency hopping based on second hop PRB information. Also, UE 100 determines whether intra-slot frequency hopping is enabled or disabled based on intra-slot frequency hopping information. That is, UE 100 performs intra-slot frequency hopping when intra-slot frequency hopping is set to enabled. Also, UE 100 does not perform intra-slot frequency hopping when intra-slot frequency hopping is set to disabled.

[0054] Note that UE 100 may determine the PUCCH resource by a method other than the above-mentioned method. For example, when UE 100 receives predetermined information (for example, useInterlacePUCCH-PUSCH), UE 100 may determine the PUCCH resource by another method.

[0055] Furthermore, UE 100 transmits PUCCH using the determined PUCCH resource. UE 100 determines a PRB numbered corresponding to the determined index of a physical resource block (PRB) as a PRB to be used for transmitting PUCCH. That is, in the first case, UE 100 may perform PUCCH transmission with frequency hopping using a PUCCH resource of the determined PRB index (for example, a first PUCCH resource and a second PUCCH resource). In the second case, UE 100 may perform PUCCH transmission with frequency hopping using a PUCCH resource of the determined PRB index (for example, a PUCCH resource determined based on start PRB information and a PUCCH resource determined based on second hop PRB information).

[0056] (User device configuration) Next, a configuration of the UE 100 according to this embodiment will be described with reference to Fig. 3. The UE 100 includes a communication unit 120 and a control unit 140.

[0057] The communication unit 120 performs wireless communication with the base station 200 by transmitting and receiving radio signals to and from the base station 200. The communication unit 120 has at least one receiving unit 121 and at least one transmitting unit 122. The receiving unit 121 and the transmitting unit 122 may be configured to include an antenna and an RF circuit. The antenna converts a signal into radio waves and radiates the radio waves into space. The antenna also receives radio waves in space and converts the radio waves into a signal. The RF circuit performs analog processing of the signal transmitted and received via the antenna. The RF circuit may include a high-frequency filter, an amplifier, a modulator, a low-pass filter, and the like.

[0058] The receiving unit 121 may be referred to as a receiver (RX). The transmitting unit 122 may be referred to as a transmitter (TX). When the UE 100 is a general UE 100A, the number of receivers included in the communication unit 120 may be two to four. When the UE 100 is a specific UE 100B, the number of receivers included in the communication unit 120 may be one or two.

[0059] The control unit 140 performs various controls in the UE 100. The control unit 140 controls communication with the base station 200 via the communication unit 120. The operation of the UE 100 described below may be an operation controlled by the control unit 140. The control unit 140 may include at least one processor capable of executing a program and a memory that stores the program. The processor may execute a program to perform the operation of the control unit 140. The control unit 140 may include a digital signal processor that performs digital processing of signals transmitted and received via the antenna and the RF circuit. The digital processing includes processing of a protocol stack of the RAN. The memory stores a program executed by the processor, parameters related to the program, and data related to the program. The memory may include at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable Read Only Memory), an EEPROM (Electrically Erasable Programmable Read Only Memory), a RAM (Random Access Memory), and a flash memory. All or a part of the memory may be included in the processor.

[0060] In the UE 100 configured in this manner, the receiver 121 receives from the base station 200 the first information indicating the first PUCCH setting, the frequency location and / or the size, and the second information indicating the frequency location and / or the size. The controller 140 identifies the initial uplink bandwidth portion based on the first information. The transmitter 122 transmits the uplink control information using the resource of the physical uplink control channel to which frequency hopping is applied. The controller 140 determines the resource of the physical uplink control channel to which frequency hopping is applied based on the first PUCCH setting and the second information. This makes it possible to appropriately control the radio resource used for uplink transmission. By appropriately controlling the radio resource used for uplink transmission, it becomes possible to efficiently operate the frequency even when the frequency bands of the user devices having different communication capabilities are made to coexist.

[0061] Furthermore, the receiver 121 may receive at least third information used for another user device having a higher communication capability than the user device. When the first information is not set, the controller 140 may specify an initial uplink bandwidth portion based on the third information. This allows the radio resource used for uplink transmission to be appropriately controlled even when the first information is not set in the UE 100.

[0062] Furthermore, the receiver 121 may receive at least third information used for other user equipment having higher communication capability than the user equipment. When the second information is not set, the controller 140 may determine the resource of the physical uplink control channel to which frequency hopping is applied based on the third information. This allows the radio resource used for uplink transmission to be appropriately controlled even when the second information is not set in the UE 100.

[0063] Furthermore, the receiver 121 may receive fourth information indicating the position of the center frequency of the initial uplink bandwidth portion. The controller 140 may determine the resource of the physical uplink control channel to which frequency hopping is applied based on the fourth information. This allows more flexible control of the radio resource used for uplink transmission.

[0064] Furthermore, the receiver 121 may receive fifth information used to set whether frequency hopping applied to the physical uplink control channel transmission is enabled or disabled. The controller 140 may determine whether frequency hopping is applied to the physical uplink control channel transmission based on the fifth information. This allows more flexible control of radio resources used for uplink transmission.

[0065] Note that the operation of the functional units (specifically, at least one of communication unit 120 and control unit 140) included in UE 100 may be described as the operation of UE 100.

[0066] (Base station configuration) Next, the configuration of the base station 200 according to this embodiment will be described with reference to Fig. 4. The base station 200 has a wireless communication unit 220, a network communication unit 230, and a control unit 240.

[0067] The wireless communication unit 220 communicates with the UE 100 via an antenna under the control of the control unit 240. The wireless communication unit 220 has a receiving unit 221 and a transmitting unit 222. The receiving unit 221 converts a wireless signal received by the antenna into a received signal which is a baseband signal, performs signal processing on the received signal, and outputs the received signal to the control unit 240. The transmitting unit 222 performs signal processing on a transmission signal which is a baseband signal output by the control unit 240, converts the transmission signal into a wireless signal, and transmits the wireless signal from the antenna.

[0068] The network communication unit 230 transmits and receives signals to and from the network. For example, the network communication unit 230 receives signals from adjacent base stations connected via an Xn interface, which is an interface between base stations, and transmits signals to the adjacent base stations. The network communication unit 230 also receives signals from the core network device 300 connected via an NG interface, and transmits signals to the core network device 300.

[0069] The control unit 240 performs various controls in the base station 200. The control unit 240 controls, for example, communication with the UE 100 via the wireless communication unit 220. The control unit 240 also controls, for example, communication with a node (for example, an adjacent base station, a core network device 300) via the network communication unit 230. The operation of the base station 200 described below may be an operation under the control of the control unit 240.

[0070] The control unit 240 may include at least one processor capable of executing a program and a memory that stores the program. The processor may execute the program to perform the operations of the control unit 240. The control unit 240 may include a digital signal processor that performs digital processing of signals transmitted and received via the antenna and the RF circuit. The digital processing includes processing of a protocol stack of the RAN. The memory stores the program executed by the processor, parameters related to the program, and data related to the program. All or a part of the memory may be included in the processor.

[0071] In the base station 200 configured as above, the transmitter 222 transmits to the UE 100 the first information indicating the first PUCCH setting, the frequency location and the size, and the second information indicating the frequency location and / or the size. The controller 240 identifies the initial uplink bandwidth portion based on the first information. The receiver 221 receives uplink control information using the resource of the physical uplink control channel to which the frequency hopping is applied. The controller 240 determines the resource of the physical uplink control channel to which the frequency hopping is applied based on the first PUCCH setting and the second information. This makes it possible to appropriately control the radio resource used for uplink transmission. By appropriately controlling the radio resource used for uplink transmission, it becomes possible to efficiently operate the frequency even when the frequency bands of the user equipments having different communication capabilities are made to coexist.

[0072] The operation of the functional units (specifically, at least one of the wireless communication unit 220 (receiving unit 221 and / or transmitting unit 222), the network communication unit 230, and the control unit 240) of the base station 200 may be described as the operation of the base station 200.

[0073] (System Operation) (1) First operation example A first operation example of the mobile communication system 1 will be described with reference to Fig. 5 and Fig. 6. In the first operation example, the UE 100 performs PUCCH transmission based on common setting information.

[0074] In Fig. 5, the UE 100 may be in an RRC idle state or an RRC inactive state between the UE 100 and the base station 200. For example, in Fig. 5, the UE 100 may be in a state in the first case. Also, in Fig. 5, the UE 100 may be performing initial access. Also, in Fig. 5, the UE 100 may be in a state before receiving an RRC setup message, an RRC resumption message, and / or an RRC (re)establishment message. For example, in Fig. 5, the UE 100 may transmit a HARQ-ACK for message 4 (i.e., PDSCH) in the random access procedure.

[0075] Step S101: The radio communication unit 220 (transmitter 222) of the base station 200 transmits common setting information including common parameters for uplink transmission to the UE 100. The communication unit 120 of the UE 100 receives the common setting information from the base station 200.

[0076] The wireless communication unit 220 transmits the common setting information by broadcast. The wireless communication unit 220 may transmit, for example, a system information block (for example, SIB1) including the common setting information. That is, the common setting information may be a cell-specific parameter.

[0077] For example, the common configuration information may be configuration information (specifically, UplinkConfigCommonSIB) for providing common uplink parameters of cells. The common configuration information may include bandwidth portion information for identifying a bandwidth portion for uplink transmission (uplink BWP). In this operation example, the bandwidth portion information may be information for identifying an initial bandwidth portion for uplink transmission (initial uplink BWP). Hereinafter, for ease of explanation, the initial uplink BWP is also referred to as the uplink BWP. That is, in this embodiment, the uplink BWP may be replaced with the initial uplink BWP.

[0078] Here, the bandwidth portion information may include first bandwidth portion information (hereinafter also referred to as first information) used to set the first bandwidth portion. The bandwidth portion information may also include second bandwidth portion information (hereinafter referred to as second information) used to set the second bandwidth portion. The bandwidth portion information may also include third bandwidth portion information (hereinafter referred to as third information) used to set the third bandwidth portion.

[0079] For example, the first bandwidth portion may correspond to a first uplink BWP, and the second bandwidth portion may correspond to a second uplink BWP. As an example, the first bandwidth portion and / or the second bandwidth portion may be an uplink BWP used for a specific UE 100B. For example, the first bandwidth portion set using the first information may be an initial uplink BWP used for a specific UE 100B. Also, the second bandwidth portion may be an uplink BWP used by the specific UE 100B to determine a PUCCH resource (i.e., a PRB index of the PUCCH resource) for transmitting uplink control information. That is, the first information may be used to identify an uplink BWP (e.g., an initial uplink BWP), and the second information may be used to determine a PUCCH resource.

[0080] For example, the first information may include information indicating a frequency location and / or a size (also referred to as locationAndBandwidth). As a result, the first information can indicate at least one of the frequency location and the size. The first information may also include information indicating a subcarrier spacing (also referred to as subcarrierSpacing). For example, the UE 100 may specify the first bandwidth portion based on information included in the first information. That is, the first information may include information for specifying the first bandwidth portion. Here, as described above, the first bandwidth portion may be an initial uplink BWP.

[0081] Furthermore, the second information may include information indicating a frequency location and / or a size (also referred to as locationAndBandwidth). Thereby, the second information can indicate at least one of the frequency location and the size. Furthermore, the second information may include information indicating a subcarrier spacing (also referred to as subcarrierSpacing). For example, the UE 100 may specify the second bandwidth portion based on information included in the second information. That is, the second information may include information for specifying the second bandwidth portion.

[0082] Also, the third bandwidth portion may correspond to a third uplink BWP. As an example, the third bandwidth portion may be an uplink BWP used at least for the general UE 100A. For example, the third bandwidth portion set using the third information may be an initial uplink BWP used at least for the general UE 100A. That is, the third information may be used to specify an uplink BWP (for example, an initial uplink BWP). Here, the third bandwidth portion may be an uplink BWP used by the specific UE 100B to determine a PUCCH resource (that is, a PRB index of the PUCCH resource) for transmitting uplink control information. That is, the third information may be used to determine a PUCCH resource.

[0083] For example, the third information may include information indicating a frequency location and / or a size (also referred to as locationAndBandwidth). The third information may also include information indicating a subcarrier spacing (also referred to as subcarrierSpacing). For example, the UE 100 may specify the third bandwidth portion based on information included in the third information. That is, the third information may include information for specifying the third bandwidth portion.

[0084] That is, the UE 100 may determine the PUCCH resource based on the second information or the third information. For example, when the second information is set, the UE 100 may determine the PUCCH resource based on the second information. Also, when the third information is set and the second information is not set, the UE 100 may determine the PUCCH resource based on the third information. As an example, when the second information is not set, the specific UE 100B may determine the PUCCH resource based on the third information set for the general UE 100A. That is, when the second bandwidth portion used to determine the PUCCH resource is not set, the specific UE 100B may determine the PUCCH resource based on the initial uplink BWP (i.e., the third bandwidth portion) used for the general UE 100A.

[0085] In the following, for ease of explanation, the first information (and / or the first bandwidth portion) and the second information (and / or the second bandwidth portion) will be used, but in this embodiment, the second information (and / or the second bandwidth portion) may be replaced with the third information (and / or the third bandwidth portion).

[0086] That is, UE 100 may determine a PUCCH resource used for frequency hopping applied to PUCCH transmission based on the second information. For example, UE 100 may determine a PUCCH resource used for frequency hopping applied to PUCCH transmission based on a frequency position and / or a size set based on the second information. Also, UE 100 may determine a PUCCH resource used for frequency hopping applied to PUCCH transmission based on a subcarrier interval set based on the second information.

[0087] For example, UE 100 may determine the PUCCH resource by using any one or more of "Math 1" to "Math 7" described above. For example, UE 100 may use the subcarrier spacing set based on the second information as the setting μ of the subcarrier spacing in "Math 1" and / or "Math 2". Also, UE 100 may use the frequency position and / or size set based on the second information as the size of the bandwidth portion i in "Math 1" and / or "Math 2". Also, UE 100 may use the frequency position and / or size set based on the second information as the size of the initial uplink BWP in "Math 5" and / or "Math 6".

[0088] That is, in the first case, UE 100 may identify a first bandwidth portion (e.g., an initial uplink BWP) based on the first information, and may determine a PUCCH resource used for frequency hopping applied to PUCCH transmission based on the second information. Also, in the first case, UE 100 may perform PUCCH transmission with frequency hopping using the PUCCH resource determined based on the second information.

[0089] Furthermore, the common configuration information may include information (hereinafter also referred to as fourth information) for indicating the position of the center frequency of an uplink BWP used (assumed) for determining a PUCCH resource (i.e., a PRB index of a PUCCH resource). For example, the UE 100 may assume (specify) an uplink BWP (e.g., a frequency position of an uplink BWP) based on the fourth information, and determine a PUCCH resource from the assumed uplink BWP. For example, the fourth information may include information for indicating positions of a plurality of center frequencies (e.g., a position of a first center frequency and a position of a second center frequency) for the assumed uplink BWP. Here, the position of the first center frequency may be used to determine a first PUCCH resource, and the position of the second center frequency may be used to determine a second PUCCH resource. That is, the UE 100 may determine a PUCCH resource used for frequency hopping applied to PUCCH transmission based on the position of the center frequency set based on the fourth information. Furthermore, the UE 100 may perform PUCCH transmission with frequency hopping using the determined PUCCH resource.

[0090] Furthermore, the common setting information may include information (hereinafter also referred to as fifth information) used to set whether frequency hopping applied to PUCCH transmission is enabled or disabled. For example, the fifth information may be set for UE 100 in the first case. For example, control unit 140 of UE 100 may determine whether frequency hopping is applied to PUCCH transmission based on the fifth information. That is, UE 100 may perform PUCCH transmission with frequency hopping when it is set to enable frequency hopping applied to PUCCH transmission using the fifth information. Also, UE 100 may perform PUCCH transmission without frequency hopping when it is set to not enable (i.e., disable) frequency hopping applied to PUCCH transmission using the fifth information. Here, UE 100 may perform PUCCH transmission without frequency hopping when it has not received the fifth information. That is, the default operation of UE 100 for frequency hopping applied to PUCCH transmission may be disabled. For example, in the case where the initial uplink BWP is determined based on the first information (first case), the default operation of UE 100 for frequency hopping applied to PUCCH transmission may be invalid. Here, for example, in the case where the initial uplink BWP is determined based on the third information (second case described later), the default operation of UE 100 for frequency hopping applied to PUCCH transmission may be valid.

[0091] In this way, by defining the default operation of UE 100 as enabled or disabled, it is no longer necessary to set frequency hopping applied to PUCCH transmission to enabled or disabled, making it possible to reduce the amount of information exchanged between base station 200 and UE 100.

[0092] Here, the fifth information may include information used to indicate whether frequency hopping in a certain slot is enabled or disabled. Here, frequency hopping in a certain slot is also referred to as intra-slot frequency hopping. The fifth information may also include information used to indicate whether frequency hopping between slots is enabled or disabled. Here, frequency hopping between slots is also referred to as inter-slot frequency hopping. For example, the control unit 140 of the UE 100 may determine whether to apply intra-slot frequency hopping to PUCCH transmission based on whether intra-slot frequency hopping is enabled or disabled. The control unit 140 of the UE 100 may also determine whether to apply inter-slot frequency hopping to PUCCH transmission based on whether inter-slot frequency hopping is enabled or disabled. That is, the UE 100 may perform inter-slot frequency hopping or PUCCH transmission involving inter-slot frequency hopping based on the fifth information.

[0093] Here, the fifth information may be set for a PUCCH format used for PUCCH transmission. That is, the fifth information may include information used to indicate whether frequency hopping is enabled or disabled for each PUCCH format. For example, the fifth information may include information indicating whether frequency hopping applied to PUCCH transmission using PUCCH format 0 is enabled or disabled, information indicating whether frequency hopping applied to PUCCH transmission using PUCCH format 1 is enabled or disabled, and the like. In addition, the fifth information may be used to indicate a PUCCH format to which frequency hopping is applicable. That is, the UE 100 may identify a PUCCH format to which frequency hopping is applicable based on the fifth information.

[0094] The common configuration information may also include the first PUCCH configuration information. As described above, the first PUCCH configuration information may indicate cell-specific parameters (cell-specific parameters) related to the PUCCH of the associated BWP. That is, the common configuration information may include the first PUCCH configuration information and bandwidth portion information related to the associated BWP. The first PUCCH configuration information may also include PUCCH configuration common information (pucch-ConfigCommon). Here, the PUCCH configuration common information (pucch-ConfigCommon) may include PUCCH resource common information (e.g., pucch-ResourceCommon) that provides a PUCCH resource set.

[0095] For example, when UE100 receives the first PUCCH configuration information, UE100 may execute the following operation. That is, when UE100 receives the first PUCCH configuration information and does not receive the second PUCCH configuration information, UE100 may execute the operation described in the following steps S102, (A), (B), (B1), (B2), and / or (C). Here, the operation described in the following steps S102, (A-1), (B-1), (B1-1), (B1-2), and / or (C-1) may be included in the operation of the first operation example.

[0096] Step S102: For example, UE 100 performs uplink transmission to base station 200. That is, communication unit 120 of UE 100 transmits an uplink signal to base station 200. Radio communication unit 220 (reception unit 221) of base station 200 receives the uplink signal from UE 100. Here, control unit 140 of UE 100 can perform the following operations. Note that control unit 240 of base station 200 can perform the same operations as control unit 140 of UE 100 in order to receive the uplink signal from UE 100.

[0097] (A-1) Identification of initial upward BWP1 The control unit 140 of the UE 100 may specify an initial uplink BWP for uplink transmission based on common setting information. For example, the control unit 140 of the UE 100 may specify an initial uplink BWP1 based on first information. For example, the control unit 140 of the UE 100 may determine a position and / or a size in the frequency domain of the initial uplink BWP1 based on information indicating a frequency position and / or a size included in the first information. Here, the size may be replaced with a bandwidth. Also, the control unit 140 of the UE 100 may determine a subcarrier spacing used in the initial uplink BWP1 based on information indicating a subcarrier spacing included in the first information.

[0098] Here, the control unit 140 of the UE 100 may specify the initial uplink BWP1 based on the third information. For example, the control unit 140 of the UE 100 may determine the position and / or size in the frequency domain of the initial uplink BWP1 based on the information indicating the frequency position and / or size included in the third information. Also, the control unit 140 of the UE 100 may determine the subcarrier spacing used in the initial uplink BWP1 based on the information indicating the subcarrier spacing included in the third information.

[0099] That is, the UE 100 may specify the initial uplink BWP1 based on the first information or the third information. For example, when the first information is set, the UE 100 may specify the initial uplink BWP1 based on the first information. Also, when the third information is set and the first information is not set, the UE 100 may specify the initial uplink BWP1 based on the third information. As an example, when the first information is not set, the specific UE 100B may specify the initial uplink BWP1 based on the third information set for the general UE 100A. That is, when the first bandwidth portion used to specify the initial uplink BWP1 is not set, the specific UE 100B may specify the initial uplink BWP1 based on the initial uplink BWP (i.e., the third bandwidth portion) used for the general UE 100A.

[0100] (B-1) PUCCH resource determination Also, the control unit 140 of the UE 100 may determine the PUCCH resource used for transmitting the PUCCH based on the common setting information. Here, as described above, the PUCCH resource may include the first PUCCH resource and the second PUCCH resource. Hereinafter, the first PUCCH resource is also referred to as the first PUCCH resource R1. Also, the second PUCCH resource is also referred to as the second PUCCH resource R2. For example, the first PUCCH resource R1 may be a PUCCH resource that is mapped to the inside of the specified initial uplink BWP1. Also, the second PUCCH resource R2 may be a resource that is hopped in the frequency domain from the first PUCCH resource R1 (i.e., used for frequency hopping applied to the PUCCH transmission). For example, the second PUCCH resource R2 may be a PUCCH resource that is mapped to the outside of the specified initial uplink BWP1.

[0101] Also, the PUCCH resource may include a third PUCCH resource R3 hopped in the frequency domain from the second PUCCH resource R2, and may include a fourth PUCCH resource R4 hopped in the frequency domain from the third PUCCH resource R3. Here, the first PUCCH resource R1 and the third PUCCH resource R3 may be the same PUCCH resource. That is, the third PUCCH resource R3 may be determined by the same method as the first PUCCH resource R1. Also, the second PUCCH resource R2 and the fourth PUCCH resource R4 may be the same PUCCH resource. That is, the fourth PUCCH resource R4 may be determined by the same method as the second PUCCH resource R2.

[0102] Here, as an example, as shown in Fig. 6, the PUCCH region for the general UE 100A may be mapped to both ends of the BWP set for the general UE 100A in the frequency direction. Here, the PUCCH region for the specific UE 100B may be mapped so as to overlap with the PUCCH region for the general UE 100A. Specifically, the first PUCCH resource R1 (and the third PUCCH resource R3) may be mapped in one PUCCH region (hereinafter, the first PUCCH region) in the frequency direction, and the second PUCCH resource R2 (and the fourth PUCCH resource R4) may be mapped in the other PUCCH region (hereinafter, the second PUCCH region) in the frequency direction.

[0103] In addition, since the bandwidth of the BWP of the specific UE 100B may be set narrower than the bandwidth of the BWP for the general UE 100A, for example, when the BWP of the specific UE 100B overlaps with the first PUCCH region, it does not have to overlap with the second PUCCH region.

[0104] (B1-1) Case in which the initial uplink BWP1 is identified based on the first information (hereinafter also referred to as the first case) In the first case, the control unit 140 of the UE 100 may specify (assume) an uplink BWP different from the initial uplink BWP1 based on the second information. Hereinafter, for clarity of explanation, the uplink BWP specified (assumed) based on the second information is also referred to as the initial uplink BWP2. That is, the initial uplink BWP2 may be replaced with the uplink BWP. That is, the control unit 140 of the UE 100 may specify (assume) an initial uplink BWP2 used to determine the PUCCH resource based on the second information. For example, the initial uplink BWP1 may be located in the first frequency band F1, and the initial uplink BWP2 may be assumed to be located in the second frequency band F2. Here, the initial uplink BWP2 may be defined as an uplink BWP used only for performing PUCCH transmission. Also, the initial uplink BWP2 may be defined as an uplink BWP used for performing PUSCH transmission in addition to PUCCH transmission. For example, when the initial uplink BWP2 is defined as the uplink BWP used to perform PUSCH transmission, the UE 100 may switch the initial uplink BWP from the initial uplink BWP1 to the initial uplink BWP2 and perform PUCCH transmission and / or PUSCH transmission.

[0105] That is, in the first case, the control unit 140 of the UE 100 may specify the initial uplink BWP1 based on the first information, and may determine at least the second PUCCH resource R2 based on the second information. Also, in the first case, the control unit 140 of the UE 100 may determine the first PUCCH resource R1 based on the first information, and may determine the second PUCCH resource R2 based on the second information. For example, the control unit 140 of the UE 100 may determine the first PUCCH resource R1 (PUCCH resource at the first hop, that is, the PRB index of the first PUCCH resource R1) based on the above-mentioned "Determination of PUCCH resource (that is, a method of determining a PUCCH resource by using any one or more of "Numbers 1" to "Numbers 7")". Also, the control unit 140 of the UE 100 may determine the second PUCCH resource R2 (PUCCH resource at the second hop, i.e., PRB index of the second PUCCH resource R2) based on the above-mentioned "Determination of PUCCH resource". That is, for example, the control unit 140 of the UE 100 may specify the frequency location, size, and / or subcarrier spacing for the initial uplink BWP2 based on the second information. That is, the control unit 140 of the UE 100 may determine the first PUCCH resource R1 and / or the second PUCCH resource R2 according to any one or more of "Equation 1" to "Equation 7" based on the specified frequency location, size, and / or subcarrier spacing.

[0106] Also, the control unit 140 of the UE 100 may determine the first PUCCH resource R1 and / or the second PUCCH resource R2 based on the fourth information. For example, the control unit 140 of the UE 100 may determine the first PUCCH resource R1 based on information indicating the position of the center frequency for the initial uplink BWP1. Also, the control unit 140 of the UE 100 may determine the second PUCCH resource R2 based on information indicating the position of the center frequency for the initial uplink BWP2.

[0107] As described above, the control unit 140 of the UE 100 may determine the second PUCCH resource R2 based on the information indicating the subcarrier spacing included in the second information. Here, the control unit 140 of the UE 100 may determine the first PUCCH resource R1 and / or the second PUCCH resource R2 based on the information indicating the subcarrier spacing included in the first information. For example, when the second information does not include information indicating the subcarrier spacing, the control unit 140 of the UE 100 may determine the first PUCCH resource R1 and / or the second PUCCH resource R2 based on the information indicating the subcarrier spacing included in the first information.

[0108] (B2-1) Case in which the initial uplink BWP1 is identified based on the third information (hereinafter also referred to as the second case) In the second case, the control unit 140 of the UE 100 may specify (assume) the initial uplink BWP2 based on the third information. For example, the control unit 140 of the UE 100 may specify (assume) the uplink BWP (i.e., the initial uplink BWP2) based on the third information using a method similar to the method of specifying the initial uplink BWP1.

[0109] That is, in the second case, the control unit 140 of the UE 100 may assume (specify) the initial uplink BWP1 and / or the initial uplink BWP2 based on the third information, and determine the first PUCCH resource R1. Also, the control unit 140 of the UE 100 may assume (specify) the initial uplink BWP1 and / or the initial uplink BWP2 based on the third information, and determine the second PUCCH resource R2. For example, similarly to the first case, in the second case, the control unit 140 of the UE 100 may assume (specify) the initial uplink BWP1 and / or the initial uplink BWP2 based on the third information, and determine the second PUCCH resource R2. Fixed( That is, the first PUCCH resource R1 and / or the second PUCCH resource R2 may be determined based on "method of determining PUCCH resources by using one or more of "Mathematical formula 1" to "Mathematical formula 7." Also, similar to the first case, in the second case, control unit 140 of UE 100 may determine the first PUCCH resource R1 and / or the second PUCCH resource R2 based on the fourth information.

[0110] Here, in the second case, the control unit 140 of the UE 100 may assume that frequency hopping is always applied to the PUCCH transmission. That is, in the second case, the frequency hopping applied to the PUCCH transmission may always be valid. That is, in the second case, the default operation of the UE 100 for the frequency hopping applied to the PUCCH transmission may be valid. Here, as described above, in the first case, the default operation of the UE 100 for the frequency hopping applied to the PUCCH transmission may be valid.

[0111] That is, when UE 100 receives the first information (i.e., when an uplink BWP (e.g., an initial uplink BWP) is identified based on the first information), UE 100 may disable (set to disabled) the default operation for frequency hopping applied to PUCCH transmission. Also, when UE 100 receives the third information and has not received the first information (i.e., when an uplink BWP (e.g., an initial uplink BWP) is identified based on the third information), UE 100 may enable (set to enabled) the default operation for frequency hopping applied to PUCCH transmission.

[0112] (C-1) Guard period The control unit 140 of the UE 100 may configure a guard period GP when performing uplink transmission by applying frequency hopping. Here, the configuration may also be replaced with generation. That is, for example, the control unit 140 of the UE 100 may determine the number of symbols used in the guard period GP when performing uplink transmission by applying frequency hopping. For example, the control unit 140 of the UE 100 may determine the number of symbols for configuring the guard period GP when performing uplink transmission in a second frequency band F2 different from the first frequency band F1 after performing uplink transmission in a first frequency band F1. That is, the control unit 140 of the UE 100 may determine the number of symbols for configuring the guard period GP when changing (switching) the frequency band from the first frequency band F1 to the second frequency band F2. Here, the control unit 140 of the UE 100 may determine the number of symbols for configuring the guard period GP even when changing (switching) the frequency band from the second frequency band F2 to the first frequency band F1. Hereinafter, determining the number of symbols for configuring the guard interval GP will also be simply referred to as generating (configuring) the guard interval GP.

[0113] Here, in this embodiment, the first frequency band F1 and / or the second frequency band F2 may include a bandwidth portion (BWP). That is, the first frequency band F1 and / or the second frequency band F2 may include a downlink bandwidth portion (downlink BWP, initial downlink BWP). Also, the first frequency band F1 and / or the second frequency band F2 may include an uplink bandwidth portion (uplink BWP, initial uplink BWP). That is, changing (switching) the frequency band may include changing (switching) the bandwidth portion (BWP). Also, changing (switching) the frequency band may include retuning the frequency of the bandwidth portion (BWP). Also, the first frequency band F1 is also described as a first frequency band. Also, the second frequency band F2 is also described as a second frequency band.

[0114] For example, the control unit 140 of the UE 100 may generate the guard period GP when the first frequency band F1 and the second frequency band F2 are not located within one BWP used by the UE 100 for uplink transmission. Also, the control unit 140 of the UE 100 may generate the guard period GP when there are two consecutive transmissions, that is, uplink transmission in the first frequency band F1 and uplink transmission in the second frequency band F2. That is, the control unit 140 of the UE 100 may generate the guard period GP when changing (switching) the frequency or retuning due to transmission in a different frequency band is performed.

[0115] For example, the control unit 140 of the UE 100 may generate the guard period GP based on the subcarrier spacing of the uplink BWP. That is, the control unit 140 of the UE 100 may generate the guard period GP based on the information indicating the subcarrier spacing included in the first information. Also, the control unit 140 of the UE 100 may generate the guard period GP based on the information indicating the subcarrier spacing included in the second information. Also, the control unit 140 of the UE 100 may generate the guard period GP based on the information indicating the subcarrier spacing included in the third information.

[0116] That is, the UE 100 may generate the guard period GP based on the information indicating the subcarrier spacing included in the first information, the information indicating the subcarrier spacing included in the second information, or the information indicating the subcarrier spacing included in the third information. For example, when the information indicating the subcarrier spacing included in the second information is set, the UE 100 may generate the guard period GP based on the information indicating the subcarrier spacing included in the second information. Also, when the information indicating the subcarrier spacing included in the first information is set and the information indicating the subcarrier spacing included in the second information is not set, the UE 100 may generate the guard period GP based on the information indicating the subcarrier spacing included in the first information. Also, when the information indicating the subcarrier spacing included in the third information is set and the information indicating the subcarrier spacing included in the first information is not set, the UE 100 may generate the guard period GP based on the information indicating the subcarrier spacing included in the third information. Also, when the information indicating the subcarrier spacing included in the third information is set and the information indicating the subcarrier spacing included in the second ...

[0117] As described above, the number of slots constituting one subframe may change based on the subcarrier interval set by the base station 200. That is, the number of symbols constituting one subframe may change based on the subcarrier interval set by the base station 200. For example, the number of symbols constituting a 1 ms subframe is determined based on the subcarrier interval set by the base station 200, and the length (length in the time direction) of each symbol changes. That is, the length (length in the time direction) of the symbol included in the guard period GP may change based on the subcarrier interval set by the base station 200. That is, the length (length in the time direction) of the symbol corresponding to the length of the guard period GP may be given based on the subcarrier interval set by the base station 200. Here, the subcarrier interval set by the base station 200 includes the subcarrier interval set based on the information indicating the subcarrier interval included in the first information, the subcarrier interval set based on the information indicating the subcarrier interval included in the first information, and / or the subcarrier interval set based on the information indicating the subcarrier interval included in the third information.

[0118] Here, when the subcarrier interval is different between the two frequency bands, the control unit 140 of the UE 100 may determine the number of symbols in each of the two frequency bands. That is, for example, the control unit 140 of the UE 100 may make the number of symbols in the frequency band with a wide subcarrier interval larger than the number of symbols in the frequency band with a narrow subcarrier interval. Also, the control unit 140 of the UE 100 may determine the total period of the lengths of the numbers of symbols determined in each of the two frequency bands as the length of the guard period GP. Also, the control unit 140 of the UE 100 may determine the number of symbols with a larger number (i.e., the guard period GP with a longer number) of the numbers of symbols determined in each of the two frequency bands as the length of the guard period GP. Also, the control unit 140 of the UE 100 may determine the number of symbols with a smaller number (i.e., the guard period GP with a shorter number) of the numbers of symbols determined in each of the two frequency bands as the length of the guard period GP.

[0119] Here, the number of symbols corresponding to the guard period GP may be determined according to the capability of UE 100. That is, control unit 140 of UE 100 may hold capability information (e.g., UE capability information) indicating the capability of UE 100. Control unit 140 of UE 100 may determine the number of symbols based on the capability information of UE 100. For example, when the capability information indicates capability 1, control unit 140 of UE 100 may determine the length of the guard period to be one symbol. Also, when the capability information indicates capability 2, control unit 140 of UE 100 may determine the length of the guard period to be two symbols.

[0120] Also, for example, the communication unit 120 of the UE 100 may transmit information used to identify the number of symbols corresponding to the guard period GP to the base station 200 as capability information. That is, the communication unit 120 of the UE 100 may transmit capability information corresponding to the number of symbols to the base station 200. Here, the capability information may be any information as long as it is information used for the number of symbols corresponding to the guard period GP.

[0121] Also, for example, the control unit 240 of the base station 200 may specify the length (i.e., the number of symbols) of the guard period GP generated by the UE 100 based on the capability information of the UE 100. Also, the control unit 240 of the base station 200 may specify a period during which the UE 100 does not perform uplink transmission based on the length (i.e., the number of symbols) of the guard period GP.

[0122] Furthermore, the control unit 140 of the UE 100 generates a guard period GP corresponding to the determined number of symbols. For example, the control unit 140 of the UE 100 may perform control so as not to perform uplink transmission within the guard period GP. Here, the uplink transmission includes at least PUSCH transmission and / or PUCCH transmission.

[0123] As shown in Fig. 5 and Fig. 6, the communication unit 120 of the UE 100 transmits the PUCCH using the determined PUCCH resource. That is, the communication unit 120 of the UE 100 performs PUCCH transmission with frequency hopping using the determined PUCCH resource. Specifically, the communication unit 120 of the UE 100 transmits the PUCCH using the first PUCCH resource R1 and / or the second PUCCH resource R2. 2 PUCCH Resource R 2 For example, the communication unit 120 of the UE 100 may transmit a HARQ-ACK for the Msg.4 (i.e., the PDSCH) using the PUCCH.

[0124] Here, the control unit 140 of the UE 100 performs PUCCH transmission using the first PUCCH resource R1, and then changes the frequency band from the first frequency band F1 to the second frequency band F2. This change may be retuning of the frequency band, or may be switching of the frequency band. For example, the control unit 140 of the UE 100 may perform retuning or switching from the first frequency band F1 to the second frequency band F2 within the generated guard period GP. Here, it is assumed that the first PUCCH resource R1 is mapped to the first frequency band F1. Also, it is assumed that the second PUCCH resource R2 is mapped to the second frequency band F2.

[0125] Furthermore, after changing the frequency band to the second frequency band, the communication unit 120 of the UE 100 executes PUCCH transmission using the second PUCCH resource R2. For example, the control unit 140 of the UE 100 may retune or switch from the second frequency band F2 to the first frequency band F1 within the generated guard period GP.

[0126] Similarly, the communication unit 120 of the UE 100 performs PUCCH transmission using the third PUCCH resource R3 after changing the frequency band to the first frequency band. For example, the control unit 140 of the UE 100 may perform retuning or switching from the first frequency band F1 to the second frequency band F2 within the generated guard period GP. Also, the communication unit 120 of the UE 100 performs PUCCH transmission using the fourth PUCCH resource R4 after changing the frequency band to the second frequency band. For example, the control unit 140 of the UE 100 may perform retuning or switching from the second frequency band F2 to the first frequency band F1 within the generated guard period GP.

[0127] (2) Second operation example With reference to Fig. 7 and Fig. 8, the second operation example will be described, mainly focusing on differences from the above-mentioned operation example. In the second operation example, the UE 100 performs PUCCH transmission based on the dedicated setting information. In Fig. 7, the UE 100 may be in an RRC connected state between the UE 100 and the base station 200. For example, in Fig. 7, the UE 100 may be in a state in the second case. Also, in Fig. 7, the UE 100 may be after performing initial access. Also, in Fig. 7, the UE 100 may be in a state after receiving an RRC setup message, an RRC resumption message, and / or an RRC (re)establishment message. For example, in Fig. 7, the UE 100 may transmit a HARQ-ACK for downlink user data (i.e., PDSCH).

[0128] Step S201: The radio communication unit 220 of the base station 200 transmits dedicated setting information including dedicated parameters for uplink transmission to the UE 100. The communication unit 120 of the UE 100 receives the dedicated setting information from the base station 200.

[0129] The wireless communication unit 220 transmits the dedicated setting information by unicast. The wireless communication unit 220 may transmit, for example, an RRC reconfiguration message including the dedicated setting information. That is, the dedicated setting information may be a UE-specific parameter.

[0130] For example, the dedicated configuration information may be configuration information (specifically, UplinkConfig) included in serving cell configuration information (specifically, ServingCellConfig) used to configure (add or change) the UE 100 in a serving cell managed by the base station 200. For example, the dedicated configuration information may include information similar to that included in the common configuration information in the first operation example. For example, the dedicated configuration information may include at least any of bandwidth portion information (first information, second information, and / or third information), information indicating the position of a center frequency for an uplink BWP (fourth information), and information indicating whether frequency hopping applied to PUCCH transmission is enabled or disabled (fifth information). Here, the information included in the dedicated configuration information may be set for an active uplink BWP. For example, the UE 100 may identify (or assume) an active uplink BWP based on the first information, the second information, and / or the third information. Also, the UE 100 may determine the position of a center frequency for an active uplink BWP based on the fourth information. Furthermore, the UE 100 may determine, based on the fourth information, whether to enable or disable frequency hopping applied to PUCCH transmission in the active uplink BWP.

[0131] For example, the dedicated configuration information may include the second PUCCH configuration information. As described above, the second PUCCH configuration information may be a PUCCH configuration for one BWP of the normal uplink of the serving cell. That is, the second PUCCH configuration information may indicate a UE-specific parameter (UE space parameter). That is, the dedicated configuration information may include the second PUCCH configuration information, an identifier of the BWP associated with the second PUCCH configuration information, and bandwidth portion information associated with the identifier of the BWP.

[0132] For example, when UE100 receives the second PUCCH configuration information, UE100 may execute the operations described in the following steps S202, (A-2), (B-2), (B2-1), (B2-2), and / or (C-2). Here, as described above, when UE100 receives the first PUCCH configuration information and does not receive the second PUCCH configuration information, UE100 may execute the operations of the first operation example.

[0133] Step S202: For example, UE 100 performs uplink transmission to base station 200. That is, communication unit 120 of UE 100 transmits an uplink signal to base station 200. Radio communication unit 220 of base station 200 receives the uplink signal from UE 100. Here, control unit 140 of UE 100 can perform the following operations. Note that control unit 240 of base station 200 can perform the same operations as control unit 140 of UE 100 in order to receive the uplink signal from UE 100.

[0134] (A-2) Identification of upstream BWP1 The control unit 140 of the UE 100 may specify an uplink BWP for uplink transmission (active uplink BWP) based on the dedicated configuration information. For example, the control unit 140 of the UE 100 may specify an active uplink BWP by any of the following methods.

[0135] For example, the control unit 140 of the UE 100 may identify the active uplink BWP1 based on the first information. For example, the control unit 140 of the UE 100 may determine the position and / or size in the frequency domain of the active uplink BWP1 based on the information indicating the frequency position and / or size included in the first information. Here, the size may be replaced with the bandwidth. Also, the control unit 140 of the UE 100 may determine the subcarrier spacing used in the active uplink BWP1 based on the information indicating the subcarrier spacing included in the first information.

[0136] Here, the control unit 140 of the UE 100 may specify the active uplink BWP1 based on the third information. For example, the control unit 140 of the UE 100 may determine the position and / or size of the active uplink BWP1 in the frequency domain based on the information indicating the frequency position and / or size included in the third information. Also, the control unit 140 of the UE 100 may determine the subcarrier spacing used in the active uplink BWP1 based on the information indicating the subcarrier spacing included in the third information.

[0137] That is, the UE 100 may specify the active uplink BWP1 based on the first information or the third information. For example, when the first information is set, the UE 100 may specify the active uplink BWP1 based on the first information. Also, when the third information is set and the first information is not set, the UE 100 may specify the active uplink BWP1 based on the third information. As an example, when the first information is not set, the specific UE 100B may specify the active uplink BWP1 based on the third information set for the general UE 100A. That is, when the first bandwidth portion used to specify the active uplink BWP1 is not set, the specific UE 100B may specify the active uplink BWP1 based on the initial uplink BWP (i.e., the third bandwidth portion) used for the general UE 100A.

[0138] In addition, when multiple uplink BWPs are set, the control unit 140 of the UE 100 may identify an active BWP from among the multiple uplink BWPs based on an identifier indicating the BWP to be used first in communication with the base station 200.

[0139] In the second operation example, the active up BWP1 and the active up BWP2 are targeted instead of the initial up BWP1 and the initial up BWP2. Therefore, in the same parts as the first operation example, the initial up BWP1 can be replaced with the active up BWP1, and the initial up BWP2 can be replaced with the active up BWP2.

[0140] (B-2) Determination of PUCCH resources Also, the control unit 140 of the UE 100 may determine the PUCCH resource used for transmitting the PUCCH based on the dedicated configuration information. Here, similar to the first operation example, the PUCCH resource includes a first PUCCH resource R1 and a second PUCCH resource R2. Also, the first PUCCH resource R1 may be a PUCCH resource mapped within the identified active uplink BWP1. Also, the second PUCCH resource R2 may be a resource hopped in the frequency domain from the first PUCCH resource R1 (i.e., used for frequency hopping applied to the PUCCH transmission). For example, the second PUCCH resource R2 may be a PUCCH resource mapped outside the identified active uplink BWP1.

[0141] (B2-1) Case in which active up BWP1 is identified based on the first information (hereinafter also referred to as the third case) In the third case, the control unit 140 of the UE 100 may specify (assume) an active uplink BWP2 different from the active uplink BWP1 based on the second information. Hereinafter, for clarity of explanation, the uplink BWP specified (assumed) based on the second information is also referred to as the active uplink BWP2. That is, the active uplink BWP2 may be replaced with the uplink BWP. That is, the control unit 140 of the UE 100 may specify (assume) an active uplink BWP2 used to determine the PUCCH resource based on the second information. For example, it may be assumed that the active uplink BWP1 is located in the first frequency band F1, and the active uplink BWP2 is located in the second frequency band F2. Here, the active uplink BWP2 may be defined as an active uplink BWP used only for performing PUCCH transmission. Also, the active uplink BWP2 may be defined as an uplink BWP used for performing PUSCH transmission in addition to PUCCH transmission. For example, when the active uplink BWP2 is defined as the uplink BWP used to perform PUSCH transmission, the UE 100 may switch the active uplink BWP from the active uplink BWP1 to the active uplink BWP2 to perform PUCCH transmission and / or PUSCH transmission.

[0142] That is, in the third case, the control unit 140 of the UE 100 may identify the active uplink BWP1 based on the first information, and may determine at least the second PUCCH resource R2 based on the second information.

[0143] Also, in the third case, the control unit 140 of the UE 100 may determine the first PUCCH resource R1 based on the first information, and may determine the second PUCCH resource R2 based on the second information. Also, the control unit 140 of the UE 100 may determine the first PUCCH resource R1 and / or the second PUCCH resource R2 based on the fourth information. For example, the control unit 140 of the UE 100 may determine the first PUCCH resource R1 based on information indicating the position of the center frequency for the active uplink BWP1. Also, the control unit 140 of the UE 100 may determine the second PUCCH resource R2 based on information indicating the position of the center frequency for the active uplink BWP1. Also, the control unit 140 of the UE 100 may determine the second PUCCH resource R2 based on information indicating the subcarrier spacing included in the second information. Here, the control unit 140 of the UE 100 may determine the first PUCCH resource R1 and / or the second PUCCH resource R2 based on the information indicating the subcarrier spacing included in the first information. For example, when the second information does not include information indicating the subcarrier spacing, the control unit 140 of the UE 100 may determine the first PUCCH resource R1 and / or the second PUCCH resource R2 based on the information indicating the subcarrier spacing included in the first information.

[0144] Here, as described above, in the second case, UE 100 may determine a PUCCH resource (i.e., a PRB index of a PUCCH resource) used for frequency hopping applied to PUCCH transmission based on the starting PRB information and / or the second hop PRB information. That is, in the second case, base station 200 may specify a PUCCH resource (i.e., a PRB index of a PUCCH resource) used for frequency hopping applied to PUCCH transmission using the starting PRB information and / or the second hop PRB information. Here, as described above, physical resource blocks (PRBs) of a subcarrier spacing setting μ are defined within a bandwidth portion and numbered (PRB number, PRB index) from 0 to the following numbers. That is, the PUCCH resource (i.e., a PRB index of a PUCCH resource) specified by the starting PRB information and / or the second hop PRB information corresponds to a PRB index numbered according to "Number 1". That is, the frequency location and / or size of the uplink BWP (active uplink BWP) is used to identify the PUCCH resource (i.e., the PRB index of the PUCCH resource) specified by the starting PRB information and / or the second hop PRB information. Also, the subcarrier spacing of the uplink BWP (active uplink BWP) is used to identify the PUCCH resource (i.e., the PRB index of the PUCCH resource) specified by the starting PRB information and / or the second hop PRB information.

[0145] For example, in the third case, the control unit 140 of the UE 100 may determine the frequency position and / or size of the uplink BWP (active uplink BWP) based on the information indicating the frequency position and / or size included in the second information. Also, in the third case, the control unit 140 of the UE 100 may determine the subcarrier spacing of the uplink BWP (active uplink BWP) based on the information indicating the subcarrier spacing included in the second information.

[0146] That is, the control unit 140 of the UE 100 may use the frequency position and / or size set based on the information indicating the frequency position and / or size included in the second information to determine the PRB index of the first PUCCH resource R1 specified using the start PRB information. Also, the control unit 140 of the UE 100 may use the subcarrier interval set based on the information indicating the subcarrier interval included in the second information to determine the PRB index of the first PUCCH resource R1 specified using the start PRB information. Also, the control unit 140 of the UE 100 may use the frequency position and / or size set based on the information indicating the frequency position and / or size included in the second information to determine the PRB index of the second PUCCH resource R2 specified using the second hop PRB information. Also, the control unit 140 of the UE 100 may use the subcarrier interval set based on the information indicating the subcarrier interval included in the second information to determine the PRB index of the second PUCCH resource R2 specified using the second hop PRB information.

[0147] In addition, in the third case, the control unit 140 of the UE 100 may determine the frequency position and / or size of the uplink BWP (active uplink BWP) based on the information indicating the frequency position and / or size included in the first information. For example, when the information indicating the frequency position and / or size included in the first information is set and the information indicating the frequency position and / or size included in the second information is not set, the control unit 140 of the UE 100 may determine the frequency position and / or size of the uplink BWP (active uplink BWP) based on the information indicating the frequency position and / or size included in the first information.

[0148] In addition, in the third case, the control unit 140 of the UE 100 may determine the subcarrier spacing of the uplink BWP (active uplink BWP) based on the information indicating the subcarrier spacing included in the first information. For example, when the information indicating the subcarrier spacing included in the first information is set and the information indicating the subcarrier spacing included in the second information is not set, the control unit 140 of the UE 100 may determine the subcarrier spacing of the uplink BWP (active uplink BWP) based on the information indicating the subcarrier spacing included in the first information.

[0149] That is, the control unit 140 of the UE 100 may use the frequency position and / or size set based on the information indicating the frequency position and / or size included in the first information to determine the PRB index of the first PUCCH resource R1 specified using the start PRB information. Also, the control unit 140 of the UE 100 may use the subcarrier interval set based on the information indicating the subcarrier interval included in the first information to determine the PRB index of the first PUCCH resource R1 specified using the start PRB information. Also, the control unit 140 of the UE 100 may use the frequency position and / or size set based on the information indicating the frequency position and / or size included in the first information to determine the PRB index of the second PUCCH resource R2 specified using the second hop PRB information. Also, the control unit 140 of the UE 100 may use the subcarrier interval set based on the information indicating the subcarrier interval included in the first information to determine the PRB index of the second PUCCH resource R2 specified using the second hop PRB information.

[0150] (B2-2) Case in which active uplink BWP1 is identified based on the third information (hereinafter also referred to as the fourth case) In the fourth case, the control unit 140 of the UE 100 may specify (assume) an active uplink BWP 2 based on the third information. For example, the control unit 140 of the UE 100 may specify (assume) an uplink BWP (i.e., an active uplink BWP 2) based on the third information using a method similar to the method of specifying the active uplink BWP 1.

[0151] Here, when the control unit 140 of the UE 100 specifies the active uplink BWP1 based on the third information, the control unit 140 may determine the first PUCCH resource R1 and / or the second PUCCH resource R2 based on the third information.

[0152] For example, in the fourth case, the control unit 140 of the UE 100 may determine the frequency location and / or size of the uplink BWP (active uplink BWP) based on the information indicating the frequency location and / or size included in the third information. Also, in the fourth case, the control unit 140 of the UE 100 may determine the subcarrier spacing of the uplink BWP (active uplink BWP) based on the information indicating the subcarrier spacing included in the third information. That is, the control unit 140 of the UE 100 may use the frequency location and / or size set based on the information indicating the frequency location and / or size included in the third information to determine the PRB index of the first PUCCH resource R1 specified using the start PRB information. Also, the control unit 140 of the UE 100 may use the subcarrier spacing set based on the information indicating the subcarrier spacing included in the third information to determine the PRB index of the first PUCCH resource R1 specified using the start PRB information. Also, the control unit 140 of the UE 100 may use the frequency position and / or size set based on the information indicating the frequency position and / or size included in the third information to determine the PRB index of the second PUCCH resource R2 specified using the second hop PRB information. Also, the control unit 140 of the UE 100 may use the subcarrier spacing set based on the information indicating the subcarrier spacing included in the third information to determine the PRB index of the second PUCCH resource R2 specified using the second hop PRB information.

[0153] For example, when information indicating a frequency position and / or a size included in the third information is set and information indicating a frequency position and / or a size included in the first information is not set, the control unit 140 of the UE 100 may determine the frequency position and / or the size of the uplink BWP (active uplink BWP) based on the information indicating the frequency position and / or the size included in the third information. Also, when information indicating a subcarrier spacing included in the third information is set and information indicating a subcarrier spacing included in the first information is not set, the control unit 140 of the UE 100 may determine the subcarrier spacing of the uplink BWP (active uplink BWP) based on the information indicating the subcarrier spacing included in the third information.

[0154] Furthermore, when information indicating the frequency position and / or size included in the third information is set and information indicating the frequency position and / or size included in the second information is not set, the control unit 140 of the UE 100 may determine the frequency position and / or size of the uplink BWP (active uplink BWP) based on the information indicating the frequency position and / or size included in the third information. Furthermore, when information indicating the subcarrier spacing included in the third information is set and information indicating the subcarrier spacing included in the second information is not set, the control unit 140 of the UE 100 may determine the subcarrier spacing of the uplink BWP (active uplink BWP) based on the information indicating the subcarrier spacing included in the third information.

[0155] (C-2) Guard Period As in the first operation example, the control unit 140 of the UE 100 may determine the number of symbols for constituting the guard period GP when performing uplink transmission in a first frequency band F1 and then performing uplink transmission in a second frequency band F2 different from the first frequency band F1, or when changing (switching) the frequency band from the first frequency band F1 to the second frequency band F2. For example, when performing PUCCH transmission based on dedicated setting information, the control unit 140 of the UE 100 may generate the guard period GP based on the dedicated setting information.

[0156] For example, the control unit 140 of the UE 100 may determine the number of symbols constituting the guard period GP based on the subcarrier interval of the active uplink BWP. Also, the control unit 140 may determine the number of symbols according to the capability of the UE 100. That is, the communication unit 120 of the UE 100 may transmit information used to specify the number of symbols corresponding to the guard period GP as capability information to the base station 200. Here, the uplink transmission includes at least PUSCH transmission and / or PUCCH transmission.

[0157] Furthermore, the control unit 140 of the UE 100 generates a guard period GP corresponding to the determined number of symbols. For example, the control unit 140 of the UE 100 may perform control so as not to perform uplink transmission within the guard period GP.

[0158] As shown in Fig. 7 and Fig. 8, the communication unit 120 of the UE 100 transmits the PUCCH using the determined PUCCH resource. That is, the communication unit 120 of the UE 100 performs the PUCCH transmission with frequency hopping using the determined PUCCH resource. Specifically, the communication unit 120 of the UE 100 performs the PUCCH transmission with frequency hopping using the first PUCCH resource R1 and / or the second PUCCH resource R2. For example, the communication unit 120 of the UE 100 may transmit the HARQ-ACK for the downlink user data (i.e., the PDSCH) using the PUCCH.

[0159] Here, the control unit 140 of the UE 100 performs PUCCH transmission using the first PUCCH resource R1, and then changes the frequency band from the first frequency band F1 to the second frequency band F2. For example, the control unit 140 of the UE 100 may perform retuning or switching from the first frequency band F1 to the second frequency band F2 within the generated guard period GP. Also, the communication unit 120 of the UE 100 performs PUCCH transmission using the second PUCCH resource R2, after changing the frequency band to the second frequency band. For example, the control unit 140 of the UE 100 may perform retuning or switching from the second frequency band F2 to the first frequency band F1 within the generated guard period GP. Similarly, the communication unit 120 of the UE 100 performs PUCCH transmission using the third PUCCH resource R3 and / or the fourth PUCCH resource R4 while changing the frequency band between the first frequency band F1 and the second frequency band F2.

[0160] (Other embodiments) In the above-described operation example, the guard period is generated when the UE 100 transmits the PUCCH. However, the present invention is not limited to this. For example, the above-described operation example may be applied to the case where the UE 100 transmits the PUSCH.

[0161] For example, the control unit 140 of the UE 100 may determine the number of symbols corresponding to the guard period according to the above-mentioned operation example when (a) retuning or switching from a first frequency band for transmitting a PUSCH to a second frequency band for transmitting a PUSCH. That is, the control unit 140 of the UE 100 may generate a guard period when the frequency band is changed from a first frequency band for transmitting a PUSCH to a second frequency band for transmitting a PUSCH, and the number of symbols corresponding to the guard period may be given by the subcarrier spacing set by the base station 200. Also, as described above, the control unit 140 of the UE 100 may determine the number of symbols corresponding to the guard period according to the above-mentioned operation example when (b) retuning or switching from a first frequency band for transmitting a PUCCH to a second frequency band for transmitting a PUCCH. That is, the control unit 140 of the UE 100 may generate a guard period when the frequency band is changed from a first frequency band in which PUCCH transmission is performed to a second frequency band in which PUCCH transmission is performed, and the number of symbols corresponding to the guard period may be given by the subcarrier spacing set by the base station 200. Also, the control unit 140 of the UE 100 may determine the number of symbols corresponding to the guard period according to the above-mentioned operation example when (c) retuning or switching from the first frequency band in which PUCCH is transmitted to the second frequency band in which PUSCH is transmitted. That is, the control unit 140 of the UE 100 may generate a guard period when the frequency band is changed from the first frequency band in which PUCCH transmission is performed to the second frequency band in which PUSCH transmission is performed, and the number of symbols corresponding to the guard period may be given by the subcarrier spacing set by the base station 200. In addition, when (d) retuning or switching from a first frequency band for transmitting a PUSCH to a second frequency band for transmitting a PUCCH, the control unit 140 of the UE 100 may determine the number of symbols corresponding to the guard period according to the above-mentioned operation example.That is, when the frequency band is changed from a first frequency band in which PUSCH transmission is performed to a second frequency band in which PUCCH transmission is performed, the control unit 140 of the UE 100 generates a guard period, and the number of symbols corresponding to the guard period may be given by the subcarrier spacing set by the base station 200.

[0162] Here, the capability information of UE 100 may be defined for each of one or more of the above (a) to (b). That is, the capability information of UE 100 corresponding to each of one or more of the above (a) to (b) may be defined. For example, UE 100 may transmit the capability information of UE 100 corresponding to each of one or more of the above (a) to (b) to base station 200.

[0163] Furthermore, the control unit 140 of the UE 100 may determine the number of symbols corresponding to the guard period based on a combination of a channel used for uplink transmission in the first frequency band and a channel used for uplink transmission in the second frequency band. For example, when the channels used for uplink transmission in the first frequency band and the second frequency band are different (the above case (a) or (b)), the control unit 140 of the UE 100 may increase the number of symbols constituting the guard period compared to when the channels used for uplink transmission in the first frequency band and the second frequency band are the same (the above case (c) or (d)).

[0164] In the above cases (a) and (b), the control unit 140 of the UE 100 may determine the number from the last symbol to be the guard period in a transmission opportunity in the first frequency band (for example, the first hop for PUCCH transmission) (hereinafter, the first symbol number) based on the subcarrier spacing of the BWP in the first frequency band, and may determine the number from the first symbol to be the guard period in a transmission opportunity in the second frequency band (for example, the second hop for PUCCH transmission) (hereinafter, the second symbol number) based on the subcarrier spacing of the BWP in the second frequency band. The control unit 140 of the UE 100 may determine the length of the guard period to be the sum of the first symbol number and the second symbol number.

[0165] In the above case (c), the control unit 140 of the UE 100 may determine the number (the second symbol number) from the first symbol to be the guard period in the transmission opportunity in the second frequency band (for example, the second hop for PUSCH transmission). The control unit 140 of the UE 100 may set the second symbol number as the length of the guard period.

[0166] In the above case (d), the control unit 140 of the UE 100 may determine the number (first symbol number) from the last symbol to be the guard period in a transmission opportunity (for example, an opportunity for PUSCH transmission) in the first frequency band. The control unit 140 of the UE 100 may set the first symbol number as the length of the guard period.

[0167] In the above embodiment, the base station 200 may include a plurality of units. The plurality of units may include a first unit hosting a higher layer included in a protocol stack and a second unit hosting a lower layer included in the protocol stack. The higher layer may include an RRC layer, an SDAP layer, and a PDCP layer, and the lower layer may include an RLC layer, a MAC layer, and a PHY layer. The first unit may be a central unit (CU), and the second unit may be a distributed unit (DU). The plurality of units may include a third unit performing processing below the PHY layer. The second unit may perform processing above the PHY layer. The third unit may be a radio unit (RU). The base station 200 may be one of the plurality of units, and may be connected to other units of the plurality of units. The base station 200 may also be an integrated access and backhaul (IAB) donor or an IAB node.

[0168] In the above-described embodiment, an NR-based mobile communication system has been described as an example of the mobile communication system 1. However, the mobile communication system 1 is not limited to this example. The mobile communication system 1 may be a system that complies with a TS of any of LTE or other generation systems (e.g., 6th generation) of the 3GPP standard. The base station 200 may be an eNB that provides E-UTRA user plane and control plane protocol termination toward the UE 100 in LTE. The mobile communication system 1 may be a system that complies with a TS of a standard other than the 3GPP standard.

[0169] The steps in the operations of the above-described embodiments do not necessarily have to be executed in chronological order according to the order described in the flow diagram or sequence diagram. For example, the steps in the operations may be executed in an order different from that described in the flow diagram or sequence diagram, or may be executed in parallel. Some of the steps in the operations may be deleted, and additional steps may be added to the process. Furthermore, each of the above-described operation flows is not limited to being executed separately and independently, but may be executed by combining two or more operation flows. For example, some steps of one operation flow may be added to another operation flow, or some steps of one operation flow may be replaced with some steps of another operation flow.

[0170] A program may be provided that causes a computer to execute each process performed by the UE 100 or the base station 200. The program may be recorded in a computer-readable medium. Using the computer-readable medium, it is possible to install the program in the computer. Here, the computer-readable medium on which the program is recorded may be a non-transient recording medium. The non-transient recording medium is not particularly limited, and may be, for example, a recording medium such as a CD-ROM or a DVD-ROM. In addition, a circuit that executes each process performed by the UE 100 or the base station 200 may be integrated, and at least a part of the UE 100 or the base station 200 may be configured as a semiconductor integrated circuit (chip set, SoC).

[0171] In the above-mentioned embodiments, "transmit" may mean performing processing of at least one layer in a protocol stack used for transmission, or may mean physically transmitting a signal wirelessly or by wire. Alternatively, "transmit" may mean a combination of performing processing of at least one layer and physically transmitting a signal wirelessly or by wire. Similarly, "receive" may mean performing processing of at least one layer in a protocol stack used for reception, or may mean physically receiving a signal wirelessly or by wire. Alternatively, "receive" may mean a combination of performing processing of at least one layer and physically receiving a signal wirelessly or by wire.

[0172] The above describes the embodiments in detail with reference to the drawings, but the specific configuration is not limited to that described above, and various design changes, etc. are possible without departing from the spirit of the invention. [Explanation of symbols]

[0173] 1: Mobile communication systems 10: Network 120: Communications Department 121: Receiving unit 122: Transmitter 140: Control section 200:Base station 220: Wireless Communication Department 221: Receiving unit 222: Transmission unit 230: Network Communication Department 240: Control section 300: Core network equipment

Claims

1. A communication device (100, 100B), A control unit (140); A receiving unit (121) for receiving a system information block 1 (SIB1) from a base station device, In a case where the SIB1 includes first information for configuring an initial uplink bandwidth portion (BWP) for a RedCap user equipment, second information for configuring a physical uplink control channel (PUCCH) resource for transmitting a HARQ-ACK, and third information for indicating whether intra-slot frequency hopping is enabled for the transmission of the PUCCH, and the communication device has not received information specific to the communication device for configuring the resource of the PUCCH, the control unit determines whether the intra-slot frequency hopping is enabled for the transmission of the PUCCH based on the third information, and determines the resource of the PUCCH within the initial uplink BWP set based on the first information based on the second information; The first information includes information for indicating a frequency domain location and a bandwidth of the initial uplink BWP, and information for indicating a subcarrier spacing of the initial uplink BWP. Communications equipment.

2. A transmitter (122), The transmission unit is If the intra-slot frequency hopping is enabled, transmitting the HARQ-ACK to the base station device using the determined PUCCH resource with the intra-slot frequency hopping; If the intra-slot frequency hopping is disabled, the HARQ-ACK is transmitted to the base station device without the intra-slot frequency hopping. The communication device according to claim 1 .

3. When the first information is not included in the SIB1 and fourth information for setting the initial uplink BWP is included in the SIB1, the control unit determines the initial uplink BWP based on the fourth information; The control unit enables the intra-slot frequency hopping for transmission of the PUCCH, the transmitting unit transmits the HARQ-ACK to the base station device using a resource of the PUCCH involving intra-slot frequency hopping in the initial uplink BWP set based on the fourth information; The fourth information includes information for indicating a frequency domain location and a bandwidth of the initial uplink BWP, and information for indicating a subcarrier spacing of the initial uplink BWP. The communication device according to claim 2 .

4. The PUCCH resource is mapped to one end of a frequency domain in the initial uplink BWP; The control unit determines an index of a physical resource block of the PUCCH based on the first information and the second information.

3. A communication device according to claim 1 or 2.

5. the communication device is the RedCap user device, The control unit disables the intra-slot frequency hopping of the transmission of the PUCCH when the first information is included in the SIB1 and the third information is not included in the SIB1.

3. A communication device according to claim 1 or 2.

6. A base station device (200) that communicates with a communication device (100, 100B), A control unit (240) for including in a system information block 1 (SIB1) first information for configuring an initial uplink bandwidth portion (BWP) for a RedCap user equipment, second information for configuring a physical uplink control channel (PUCCH) resource for transmitting a HARQ-ACK, and third information for indicating whether intra-slot frequency hopping is enabled for transmitting the PUCCH; A transmission unit (222) for transmitting the SIB1 to the communication device that has not received information specific to the communication device for setting the PUCCH resource, The first information includes information for indicating a frequency domain location and a bandwidth of the initial uplink BWP, and information for indicating a subcarrier spacing of the initial uplink BWP. Base station equipment.

7. A receiving unit (221), The receiving unit is If the intra-slot frequency hopping is enabled, receiving the HARQ-ACK from the communication device using the configured PUCCH resource with the intra-slot frequency hopping; If the intra-slot frequency hopping is disabled, the HARQ-ACK is received from the communication device using the configured PUCCH resource without the intra-slot frequency hopping. The base station device according to claim 6.

8. When the first information is not included in the SIB1 and fourth information for setting the initial uplink BWP is included in the SIB1, the control unit determines the initial uplink BWP based on the fourth information; The control unit enables the intra-slot frequency hopping for reception of the PUCCH, The receiving unit receives the HARQ-ACK from the communication device using a resource of the PUCCH with intra-slot frequency hopping in the initial uplink BWP set based on the fourth information. The base station device according to claim 7.

9. The PUCCH resource is mapped to one end of a frequency domain in the initial uplink BWP; An index of a physical resource block of the PUCCH is determined based on the first information and the second information. The base station device according to claim 6 or 7.

10. the communication device is the RedCap user device, The control unit disables the intra-slot frequency hopping of the reception of the PUCCH when the first information is included in the SIB1 and the third information is not included in the SIB1. The base station device according to claim 6 or 7.

11. A communication method performed in a communication device (100), comprising: receiving system information block 1 (SIB1) from a base station device; and when the SIB1 includes first information for configuring an initial uplink bandwidth portion (BWP) for a RedCap UE, second information for configuring a resource of a Physical Uplink Control Channel (PUCCH) for transmitting a HARQ-ACK, and third information for indicating whether intra-slot frequency hopping is enabled for the transmission of the PUCCH, and the communication device has not received information specific to the communication device for configuring a resource of the PUCCH, determining whether intra-slot frequency hopping is enabled for the transmission of the PUCCH based on the third information, and determining a resource of the PUCCH in the initial uplink BWP set based on the first information based on the second information; The first information includes information for indicating a frequency domain location and a bandwidth of the initial uplink BWP, and information for indicating a subcarrier spacing of the initial uplink BWP. Communication methods.

12. if the intra-slot frequency hopping is enabled, transmitting the HARQ-ACK to the base station device using the determined PUCCH resource with the intra-slot frequency hopping; If the intra-slot frequency hopping is disabled, transmitting the HARQ-ACK to the base station device without the intra-slot frequency hopping. The communication method according to claim 11.

13. determining the initial uplink BWP based on the fourth information when the first information is not included in the SIB1 and the fourth information for setting the initial uplink BWP is included in the SIB1; enabling the intra-slot frequency hopping for transmission of the PUCCH; transmitting the HARQ-ACK to the base station device using a resource of the PUCCH involving intra-slot frequency hopping in the initial uplink BW set based on the fourth information; The fourth information includes information for indicating a frequency domain location and a bandwidth of the initial uplink BWP, and information for indicating a subcarrier spacing of the initial uplink BWP. The communication method according to claim 11.

14. The PUCCH resource is mapped to one end of a frequency domain in the initial uplink BWP; determining an index of a physical resource block of the PUCCH based on the first information and the second information.

13. A communication method according to claim 11 or 12.

15. the communication device is the RedCap user device, If the first information is included in the SIB1 and the third information is not included in the SIB1, disabling the intra-slot frequency hopping of the PUCCH transmission.

13. A communication method according to claim 11 or 12.

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