WO2024180811A1 - Dispositif terminal, dispositif de station de base et procédé de communication - Google Patents

Dispositif terminal, dispositif de station de base et procédé de communication Download PDF

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Publication number
WO2024180811A1
WO2024180811A1 PCT/JP2023/037894 JP2023037894W WO2024180811A1 WO 2024180811 A1 WO2024180811 A1 WO 2024180811A1 JP 2023037894 W JP2023037894 W JP 2023037894W WO 2024180811 A1 WO2024180811 A1 WO 2024180811A1
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WO
WIPO (PCT)
Prior art keywords
slot
rach
terminal device
uplink
sbfd
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PCT/JP2023/037894
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English (en)
Japanese (ja)
Inventor
大一郎 中嶋
渉 大内
麗清 劉
翔一 鈴木
龍之介 坂本
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シャープ株式会社
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Publication of WO2024180811A1 publication Critical patent/WO2024180811A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to a terminal device, a base station device, and a communication method.
  • This application claims priority to Japanese Patent Application No. 2023-029908, filed on February 28, 2023, the contents of which are incorporated herein by reference.
  • LTE Long Term Evolution
  • EUTRA Evolved Universal Terrestrial Radio Access
  • 3GPP 3rd Generation Partnership Project
  • base station equipment is also called eNodeB (evolved NodeB)
  • terminal equipment is also called UE (User Equipment).
  • LTE is a cellular communication system in which the areas covered by base station equipment are arranged in multiple cell-like configurations. A single base station equipment may manage multiple serving cells.
  • NR New Radio
  • eMBB enhanced Mobile BroadBand
  • mMTC massive Machine Type Communication
  • URLLC Ultra Reliable and Low Latency Communication
  • 3GPP is studying a method to enable the simultaneous existence of downlink and uplink in TDD (Time Division Duplex) (Non-Patent Document 1).
  • a technology SBFD: SubBand non-overlapping Full Duplex that configures downlink and uplink subbands in the TDD frequency band is being studied.
  • one aspect of the present invention provides a terminal device, a base station device, a communication method used in the terminal device, and a communication method used in the base station device that can efficiently use resources.
  • a first aspect of the present invention is a terminal device including a processor and a memory for storing computer program code, which receives information indicating the number of RACH occasions per SSB for an uplink slot and information indicating the number of RACH occasions per SSB for an SBFD (SubBand non-overlapping Full Duplex) slot, determines a RACH occasion configured in an uplink slot based on the information indicating the number of RACH occasions per SSB for the uplink slot, determines a RACH occasion configured in an SBFD slot based on the information indicating the number of RACH occasions per SSB for the SBFD slot, selects a RACH occasion configured in the uplink slot or a RACH occasion configured in the SBFD slot, and transmits a random access preamble in the selected RACH occasion.
  • SBFD SubBand non-overlapping Full Duplex
  • a second aspect of the present invention is a communication method for use in a terminal device, comprising the steps of receiving information indicating the number of RACH occasions per SSB for an uplink slot and information indicating the number of RACH occasions per SSB for an SBFD (SubBand non-overlapping Full Duplex) slot, determining a RACH occasion configured in an uplink slot based on the information indicating the number of RACH occasions per SSB for the uplink slot, determining a RACH occasion configured in an SBFD slot based on the information indicating the number of RACH occasions per SSB for the SBFD slot, selecting a RACH occasion configured in the uplink slot or a RACH occasion configured in the SBFD slot, and transmitting a random access preamble in the selected RACH occasion.
  • SBFD SubBand non-overlapping Full Duplex
  • a third aspect of the present invention is a base station device comprising a processor and a memory for storing computer program code, which determines a RACH occasion configured in an uplink slot, determines a RACH occasion configured in an SBFD slot, transmits information indicating the number of RACH occasions per SSB for the uplink slot and information indicating the number of RACH occasions per SSB for the SBFD slot, and detects a random access preamble in the RACH occasion configured in the uplink slot and the RACH occasion configured in the SBFD slot.
  • a fourth aspect of the present invention is a communication method used in a base station device, comprising the steps of determining a RACH occasion configured in an uplink slot, determining a RACH occasion configured in an SBFD slot, transmitting information indicating the number of RACH occasions per SSB for the uplink slot and information indicating the number of RACH occasions per SSB for the SBFD slot, and performing detection of a random access preamble in the RACH occasion configured in the uplink slot and the RACH occasion configured in the SBFD slot.
  • resources can be efficiently utilized between a terminal device and a base station device.
  • FIG. 1 is a conceptual diagram of a wireless communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram illustrating an example of a resource grid in a subframe according to an aspect of the present embodiment.
  • 1 is a schematic block diagram showing a configuration of a terminal device 1 according to an aspect of the present embodiment.
  • 1 is a schematic block diagram showing a configuration of a base station device 3 according to one aspect of the present embodiment.
  • FIG. 13 is a diagram illustrating an example of an initial connection procedure according to an aspect of the present embodiment.
  • FIG. 2 is a diagram illustrating an example of a configuration of a radio frame according to an aspect of the present embodiment.
  • a and/or B may be a term including “A”, “B”, or "A and B”.
  • a parameter or information indicating one or more values may mean that the parameter or information at least includes a parameter or information indicating the one or more values.
  • the upper layer parameter may be a single upper layer parameter.
  • the upper layer parameter may be an information element (IE) including multiple parameters.
  • FIG. 1 is a conceptual diagram of a wireless communication system according to one aspect of this embodiment.
  • the wireless communication system includes terminal devices 1A-1C and base station devices 3A-3B.
  • terminal devices 1A-1C are also referred to as terminal devices 1 (UE).
  • base station devices 3A-3B are also referred to as base station devices 3 (gNB).
  • the base station device 3 may be configured to include one or both of an MCG (Master Cell Group) and an SCG (Secondary Cell Group).
  • the MCG is a group of serving cells including at least a PCell (Primary Cell).
  • the SCG is a group of serving cells including at least a PSCell (Primary Secondary Cell).
  • the PCell may be a serving cell provided based on an initial connection.
  • the MCG may be configured to include one or more SCells (Secondary Cells).
  • the SCG may be configured to include one or more SCells.
  • the serving cell identity is a short identifier for identifying a serving cell.
  • the serving cell identity may be provided by an upper layer parameter.
  • the terminal device 1 and the base station device 3 may use one or more communication methods.
  • CP-OFDM Cyclic Prefix-Orthogonal Frequency Division Multiplex
  • DFT-s-OFDM Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplex
  • DFT-s-OFDM is a communication method in which transform precoding is applied prior to signal generation in CP-OFDM.
  • transformed precoding is also referred to as DFT precoding.
  • the base station device 3 may be configured with one transceiver device (or a transmission point, a transmitting device, a receiving point, a receiving device, a transceiver point).
  • the base station device 3 may be configured to include multiple transceivers.
  • each of the multiple transceivers may be located in a different geographical location.
  • the subcarrier spacing setting ⁇ may represent any of 0, 1, 2, 3, and 4.
  • the radio frame may be configured to include 10 subframes.
  • the OFDM symbol is used as the unit of time domain for the communication method used in the wireless communication system.
  • the OFDM symbol may be used as the unit of time domain for CP-OFDM.
  • the OFDM symbol may also be used as the unit of time domain for DFT-s-OFDM.
  • a slot may be configured to include multiple OFDM symbols.
  • one slot may be configured by Nslotsymb consecutive OFDM symbols.
  • Nslotsymb 14.
  • Nslotsymb 12.
  • the slots may be indexed in the time domain.
  • the slot index n ⁇ s may be given in ascending order as integer values ranging from 0 to Nsubframe, ⁇ slot-1 in the subframe.
  • the slot index n ⁇ s,f may be given in ascending order as integer values ranging from 0 to Nframe, ⁇ slot-1 in the radio frame.
  • FIG. 2 is a diagram showing an example of the configuration of a resource grid according to one aspect of this embodiment.
  • the horizontal axis is the OFDM symbol index lsym
  • the vertical axis is the subcarrier index ksc.
  • the resource grid of FIG. 2 includes Nsize, ⁇ grid, x ⁇ NRBsc subcarriers, and Nsubframe, ⁇ symb OFDM symbols.
  • Nsize, ⁇ grid, x indicate the bandwidth of the SCS-specific carrier.
  • the values of Nsize, ⁇ grid, x are expressed in units of resource blocks.
  • a resource identified by the subcarrier index ksc and the OFDM symbol index lsym is also called a resource element (RE: ResourceElement).
  • a resource block (RB) contains NRBsc consecutive subcarriers.
  • a BWP (BandWidth Part) may be configured as a subset of a resource grid.
  • a BWP set for a downlink is also referred to as a downlink BWP.
  • a BWP set for an uplink is also referred to as an uplink BWP.
  • FIG. 3 is a schematic block diagram showing the configuration of a terminal device 1 according to one aspect of this embodiment.
  • the terminal device 1 includes a radio transmission/reception unit 10 and an upper layer processing unit 14.
  • the radio transmission/reception unit 10 includes at least an antenna unit 11, an RF (Radio Frequency) unit 12, and part or all of a baseband unit 13.
  • the upper layer processing unit 14 includes at least a medium access control layer processing unit 15, and part or all of a radio resource control layer processing unit 16.
  • the radio transmission/reception unit 10 is also referred to as a transmitting unit, a receiving unit, or a physical layer processing unit.
  • the wireless transceiver unit 10 performs physical layer processing.
  • the radio transceiver 10 may generate a baseband signal of an uplink physical channel.
  • a transport block delivered from a higher layer on the UL-SCH may be placed on the uplink physical channel.
  • the radio transceiver 10 may generate a baseband signal of an uplink physical signal.
  • the wireless transceiver 10 may attempt to detect information transmitted by a downlink physical channel.
  • a transport block of the information transmitted by the downlink physical channel may be delivered to a higher layer on the DL-SCH.
  • the wireless transceiver 10 may attempt to detect information transmitted by a downlink physical signal.
  • the receiving unit of the terminal device 1 receives the PDCCH.
  • the receiving processing unit of the terminal device 1 performs processing to receive the PDCCH in the downlink frequency band (cell, component carrier, carrier).
  • the receiving processing unit of the terminal device 1 performs processing such as demodulation and decoding on the PDCCH.
  • the receiving processing unit of the terminal device 1 performs processing to receive the PDCCH and performs processing to detect downlink control information.
  • the receiving unit of the terminal device 1 receives the PDSCH.
  • the receiving processing unit of the terminal device 1 performs processing to receive the PDSCH in the downlink frequency band (cell, component carrier, carrier).
  • the receiving processing unit of the terminal device 1 performs processing such as demodulation and decoding on the PDSCH.
  • the receiving section of terminal device 1 receives the SSB.
  • the receiving section of terminal device 1 selects the SSB with the best reception conditions.
  • the transmitting unit (also referred to as the transmission processing unit) of the terminal device 1 transmits a HARQ-ACK.
  • the transmitting processing unit of the terminal device 1 transmits a HARQ-ACK for the PDSCH.
  • the transmitting processing unit of the terminal device 1 transmits a HARQ-ACK in the uplink frequency band (cell, component carrier, carrier).
  • the transmitting unit of the terminal device 1 transmits a random access preamble.
  • the transmitting processing unit of the terminal device 1 transmits the random access preamble using the PRACH.
  • the transmitting unit of the terminal device 1 transmits a RACH in a RACH occasion.
  • the transmitting unit of the terminal device 1 selects a RACH occasion from one or more RACH occasions corresponding to the SSB selected by the receiving unit of the terminal device 1, and transmits a RACH (random access preamble) in the selected RACH occasion.
  • the upper layer processing unit 14 outputs uplink data (transport blocks) generated by user operations, etc., to the wireless transceiver unit 10.
  • the upper layer processing unit 14 processes the MAC layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, and RRC layer.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • RRC Radio Link Control
  • the media access control layer processing unit (MAC layer processing unit) 15 provided in the upper layer processing unit 14 performs MAC layer processing.
  • the radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs RRC layer processing.
  • the radio resource control layer processing unit 16 manages various setting information/parameters (RRC parameters) of its own device.
  • the radio resource control layer processing unit 16 sets various setting information/parameters (RRC parameters) based on upper layer signals received from the base station device 3. That is, the radio resource control layer processing unit 16 sets various setting information/parameters (RRC parameters) based on information indicating the various setting information/parameters (RRC parameters) received from the base station device 3.
  • the setting information may include information related to processing or setting of physical channels and physical signals (i.e., the physical layer), the MAC layer, the PDCP layer, the RLC layer, and the RRC layer.
  • the parameters may be upper layer parameters.
  • the radio resource control layer processing unit 16 may acquire RRC parameters contained in an RRC message on a certain logical channel, and set the acquired RRC parameters in a memory area of the terminal device 1.
  • the RRC parameters set in the memory area of the terminal device 1 may be provided to a lower layer.
  • the radio resource control layer processing unit 16 sets a control resource set based on the RRC signaling received from the base station device 3.
  • the radio resource control layer processing unit 16 sets (configures) a search area within the control resource set.
  • the radio resource control layer processing unit 16 sets (configures) PDCCH candidates to be monitored within the control resource set.
  • the radio resource control layer processing unit 16 sets (configures) the number of PDCCH candidates to be monitored within the control resource set.
  • the radio resource control processing unit 16 sets (configures) the aggregation level of the PDCCH candidates to be monitored within the control resource set.
  • the radio resource control layer processing unit 16 sets the DCI format to be monitored.
  • the radio resource control layer processing unit 16 sets the RACH occasion based on the RRC parameters received from the base station device 3.
  • the transmitting unit of the terminal device 1 transmits a RACH (random access preamble) in the set RACH occasion.
  • the media access control layer processing unit (MAC layer processing unit) 15 performs MAC layer processing such as HARQ operations.
  • the radio resource control layer processing unit 16 may include functional information generated based on the functions of the terminal device 1 in an RRC message and transmit the information to the base station device 3.
  • the wireless transceiver 10 performs modulation, encoding, and transmission processing.
  • the wireless transceiver 10 generates a physical signal by encoding data (transport block), modulating it, and generating a baseband signal (converting it into a time-continuous signal), and transmits it to the base station device 3 or the terminal device 1.
  • the wireless transceiver unit 10 performs demodulation, decoding, and reception processing.
  • the wireless transceiver unit 10 outputs the transport block of the information detected based on the demodulation and decoding processing of the received physical signal to the upper layer processing unit 14 on the DL-SCH.
  • the RF unit 12 converts the signal received via the antenna unit 11 into a baseband signal (down-converts) and removes unnecessary frequency components.
  • the RF unit 12 outputs the baseband signal to the baseband unit 13.
  • the baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal.
  • the baseband unit 13 removes the portion corresponding to the CP (Cyclic Prefix) from the converted digital signal.
  • the baseband unit 13 performs a fast Fourier transform (FFT) on the signal from which the CP has been removed, and extracts the signal in the frequency domain.
  • FFT fast Fourier transform
  • the baseband unit 13 performs an inverse fast Fourier transform (IFFT) on the physical signal to generate an OFDM symbol.
  • the baseband unit 13 adds a CP to the generated OFDM symbol to generate a baseband digital signal.
  • the baseband unit 13 converts the baseband digital signal into an analog signal.
  • the baseband unit 13 outputs the converted analog signal to the RF unit 12.
  • IFFT inverse fast Fourier transform
  • the RF unit 12 uses a low-pass filter to remove unnecessary frequency components from the analog signal input from the baseband unit 13, and up-converts the analog signal to a carrier frequency to generate an RF signal.
  • the RF unit 12 transmits the RF signal via the antenna unit 11.
  • the RF unit 12 also amplifies the power.
  • the RF unit 12 may also have a function of controlling the transmission power.
  • the RF unit 12 is also referred to as a transmission power control unit.
  • FIG. 4 is a schematic block diagram showing the configuration of a base station device 3 according to one aspect of this embodiment.
  • the base station device 3 includes a radio transmission/reception unit 30 and a higher layer processing unit 34.
  • the radio transmission/reception unit 30 includes an antenna unit 31, an RF (Radio Frequency) unit 32, and a baseband unit 33.
  • the higher layer processing unit 34 includes a medium access control layer processing unit 35 and a radio resource control layer processing unit 36.
  • the radio transmission/reception unit 30 is also referred to as a transmitting unit, a receiving unit, or a physical layer processing unit.
  • the upper layer processing unit 34 processes the Medium Access Control (MAC) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the Radio Resource Control (RRC) layer.
  • MAC Medium Access Control
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • RRC Radio Resource Control
  • the MAC layer is also referred to as the MAC sublayer.
  • the PDCP layer is also referred to as the PDCP sublayer.
  • the RLC layer is also referred to as the RLC sublayer.
  • the RRC layer is also referred to as the RRC sublayer.
  • the medium access control layer processing unit 35 provided in the upper layer processing unit 34 performs MAC layer processing.
  • the MAC layer processing may include mapping between logical channels and transport channels, multiplexing one or more MAC SDUs (Service Data Units) into transport blocks, decomposing a transport block delivered from the physical layer on the UL-SCH into one or more MAC SDUs, applying HARQ (Hybrid Automatic Repeat reQuest) to the transport block, and some or all of the processing of scheduling requests.
  • MAC SDUs Service Data Units
  • HARQ Hybrid Automatic Repeat reQuest
  • the radio resource control layer processing unit 36 included in the upper layer processing unit 34 performs RRC layer processing.
  • the RRC layer processing may include some or all of the management of broadcast signals, management of RRC connection/RRC idle states, and RRC reconfiguration.
  • the radio resource control layer processing unit 36 generates downlink data (transport blocks), system information, RRC messages, MAC CE, etc. that are placed in the PDSCH, or obtains them from the upper node, and outputs them to the radio transceiver unit 30.
  • the radio resource control layer processing unit 36 also manages various setting information/parameters (RRC parameters) for each terminal device 1.
  • the radio resource control layer processing unit 36 may set various setting information/parameters for each terminal device 1 via a signal from a higher layer. That is, the radio resource control layer processing unit 36 transmits/reports information indicating various setting information/parameters.
  • the setting information may include information related to processing or setting of a physical channel or physical signal (i.e., the physical layer), the MAC layer, the PDCP layer, the RLC layer, and the RRC layer.
  • the parameters may be higher layer parameters.
  • the radio resource control layer processing unit 36 may include the RRC parameters in an RRC message on a certain logical channel and transmit it to the terminal device 1.
  • the RRC message may be mapped to any one of the BCCH (Broadcast Control CHannel), CCCH (Common Control CHannel), and DCCH (Dedicated Control CHannel).
  • the radio resource control layer processing unit 36 may determine the RRC parameters to be transmitted to the terminal device 1 based on the RRC parameters included in the RRC message transmitted from the terminal device 1.
  • the RRC message transmitted from the terminal device 1 may be related to a functional information report of the terminal device 1.
  • the radio resource control layer processing unit 36 sets a control resource set for the terminal device 1. Multiple PDCCH candidates are configured (set) within the set control resource set.
  • the radio resource control layer processing unit 36 sets a search space for the terminal device 1.
  • the radio resource control layer processing unit 36 sets a DCI format to be monitored in the search space for the terminal device 1.
  • the radio resource control layer processing unit 36 sets the DCI format to be applied to the terminal device 1 within the control resource set.
  • the radio resource control layer processing unit 36 generates RRC signaling indicating the DCI format to be applied to the terminal device 1.
  • the radio resource control layer processing unit 36 sets one or more DCI formats to be applied in the transmission processing unit.
  • the radio resource control layer processing unit 36 performs settings related to multiple search areas. Each setting related to the multiple search areas is indexed.
  • the radio resource control layer processing unit 36 sets resources for transmitting HARQ-ACK to the terminal device 1.
  • the radio resource control layer processing unit 36 sets resources for transmitting HARQ-ACK for the PDSCH in the downlink frequency band (cell, component carrier, carrier).
  • the radio resource control layer processing unit 36 sets resources for transmitting HARQ-ACK for the PDSCH in the uplink frequency band (cell, component carrier, carrier).
  • the radio resource control layer processing unit 36 sets the number of RACH occasions corresponding to each SSB.
  • the radio resource control layer processing unit 36 sets the RACH occasions.
  • the media access control layer processing unit (MAC layer processing unit) 35 performs MAC layer processing such as HARQ operations.
  • the functions of the wireless transceiver unit 30 are similar to those of the wireless transceiver unit 10, and therefore a description thereof will be omitted where appropriate.
  • the wireless transceiver unit 30 performs physical layer processing.
  • the physical layer processing may include some or all of the following: generation of a baseband signal for a physical channel, generation of a baseband signal for a physical signal, detection of information transmitted by the physical channel, and detection of information transmitted by the physical signal.
  • the physical layer processing may include mapping processing of a transport channel to a physical channel.
  • the baseband signal is also referred to as a time-continuous signal.
  • the wireless transceiver 30 may perform one or both of demodulation and decoding processes.
  • the wireless transceiver 30 may deliver a transport block of the information detected based on the demodulation and decoding processes of the received physical signal to a higher layer on the UL-SCH.
  • the wireless transceiver 30 may generate a baseband signal of a downlink physical channel.
  • the transport block delivered from a higher layer on the DL-SCH may be placed in the downlink physical channel.
  • the wireless transceiver 30 may generate a baseband signal of a downlink physical signal.
  • the wireless transceiver unit 30 may perform some or all of the modulation process, the encoding process, and the transmission process.
  • the wireless transceiver unit 30 may generate a physical signal based on some or all of the encoding process, the modulation process, and the baseband signal generation process for the transport block.
  • the wireless transceiver unit 30 may place the physical signal in a certain BWP.
  • the wireless transceiver unit 30 may transmit the generated physical signal.
  • the wireless transceiver unit 30 may attempt to detect information transmitted by an uplink physical channel.
  • the transport block of the information transmitted by the uplink physical channel may be delivered to a higher layer on the UL-SCH.
  • the wireless transceiver unit 30 may attempt to detect information transmitted by an uplink physical signal.
  • the wireless transmission/reception unit 30 grasps the SS (Search space) configured in the terminal device 1.
  • the wireless transmission/reception unit 30 grasps the search space in the control resource set configured in the terminal device 1.
  • the wireless transmission/reception unit 30 grasps the PDCCH candidates monitored in the terminal device 1 to grasp the search space.
  • the wireless transmission/reception unit 30 grasps which control channel element each PDCCH candidate monitored in the terminal device 1 is composed of (it grasps the number of the control channel element in which the PDCCH candidate is composed).
  • the wireless transmission/reception unit 30 includes an SS grasping unit, which grasps the SS configured in the terminal device 1.
  • the SS grasping unit grasps one or more PDCCH candidates in the control resource set configured as the search space of the terminal device.
  • the SS grasping unit grasps the PDCCH candidates (the number of PDCCH candidates, the number of the PDCCH candidate) configured in the search space of the control resource set of the terminal device 1.
  • the SS grasping unit grasps the configuration of the search area within the control resource set (the number of PDCCH candidates, the OFDM symbols of the PDCCH candidates, and the aggregation level of the PDCCH candidates).
  • the transmitting unit (transmission processing unit) of the wireless transceiver unit 30 transmits a PDCCH to the terminal device 1 using the PDCCH candidates within the search area of the control resource set.
  • the transmission unit (also referred to as the transmission processing unit) of the base station device 3 transmits the PDCCH.
  • the transmission processing unit of the base station device 3 transmits the PDCCH using PDCCH candidates monitored by the terminal device 1.
  • the transmission processing unit of the base station device 3 transmits the PDCCH using resources corresponding to PDCCH candidates in a search area set for the terminal device 1.
  • the transmission processing unit of the base station device 3 transmits the PDCCH using PDCCH candidates in a search area where the PDCCH is monitored by the terminal device 1, among multiple search areas set for the terminal device 1.
  • the receiving unit (also referred to as the receiving processing unit) of base station device 3 receives the HARQ-ACK.
  • the receiving processing unit of base station device 3 receives the HARQ-ACK for the PDSCH.
  • the receiving processing unit of base station device 3 receives the HARQ-ACK in the uplink frequency band (cell, component carrier, carrier).
  • the receiving processing unit of base station device 3 receives the HARQ-ACK for the PDSCH in the downlink frequency band (cell, component carrier, carrier) managed by base station device 3.
  • the receiving unit of the base station device 3 receives the RACH.
  • the receiving unit of the base station device 3 performs detection processing for the random access preamble.
  • the RF unit 32 may convert the signal received via the antenna unit 31 into a baseband signal and remove unnecessary frequency components.
  • the RF unit 32 outputs the baseband signal to the baseband unit 33.
  • the baseband unit 33 may digitize the baseband signal input from the RF unit 32.
  • the baseband unit 33 may remove a portion corresponding to a cyclic prefix (CP) from the digitized baseband signal.
  • the baseband unit 33 may perform a fast Fourier transform (FFT) on the baseband signal from which the CP has been removed, and extract a signal in the frequency domain.
  • FFT fast Fourier transform
  • the baseband unit 33 may generate a baseband signal by performing an inverse fast Fourier transform (IFFT) on the physical signal.
  • the baseband unit 33 may add a CP to the generated baseband signal.
  • the baseband unit 33 may convert the baseband signal to which the CP has been added into an analog signal.
  • the baseband unit 33 may output the analogized baseband signal to the RF unit 32.
  • IFFT inverse fast Fourier transform
  • the RF unit 32 may remove unnecessary frequency components from the baseband signal input from the baseband unit 33.
  • the RF unit 32 may up-convert the baseband signal to a carrier frequency to generate an RF signal.
  • the RF unit 32 may transmit the RF signal via the antenna unit 31.
  • the RF unit 32 may also have a function of controlling the transmission power.
  • Each of the units numbered 10 to 16 in the terminal device 1 may be configured as a circuit.
  • Each of the units numbered 30 to 36 in the base station device 3 may be configured as a circuit.
  • the physical signal is a general term for the downlink physical channel, the downlink physical signal, the uplink physical channel, and the uplink physical channel.
  • the physical channel is a general term for the downlink physical channel and the uplink physical channel.
  • the physical signal is a general term for the downlink physical signal and the uplink physical signal.
  • the uplink physical channel may correspond to a set of resource elements carrying information generated in a higher layer.
  • the uplink physical channel is a physical channel used in an uplink component carrier.
  • the uplink physical channel may be transmitted by the radio transceiver unit 10.
  • the uplink physical channel may be received by the radio transceiver unit 30.
  • at least some or all of the following uplink physical channels are used.
  • ⁇ PUCCH Physical Uplink Control CHannel
  • PUSCH Physical Uplink Shared CHannel
  • PRACH Physical Random Access CHannel
  • the PUCCH may be used to transmit (transmit) uplink control information (UCI).
  • UCI uplink control information
  • the uplink control information may be placed in the PUCCH.
  • the radio transceiver unit 10 may transmit the PUCCH in which the uplink control information is placed.
  • the radio transceiver unit 30 may receive the PUCCH in which the uplink control information is placed.
  • the uplink control information (uplink control information bit, uplink control information sequence, uplink control information type) includes some or all of the channel state information (CSI: Channel State Information), scheduling request (SR: Scheduling Request), and HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) information. Note that the uplink control information may also include information not described above.
  • CSI Channel State Information
  • SR Scheduling Request
  • HARQ-ACK Hybrid Automatic Repeat request ACKnowledgement
  • the channel state information is also called channel state information bits or channel state information sequences.
  • the scheduling request is also called scheduling request bits or scheduling request sequences.
  • the HARQ-ACK information is also called HARQ-ACK information bits or HARQ-ACK information sequences.
  • the HARQ-ACK information may consist of HARQ-ACK bits corresponding to one transport block (TB).
  • the HARQ-ACK bits may indicate an acknowledgement (ACK) or a negative-acknowledgement (NACK) corresponding to the transport block.
  • the ACK may indicate that the decoding of the transport block has been successfully completed.
  • the NACK may indicate that the decoding of the transport block has not been successfully completed.
  • the HARQ-ACK information may include one or more HARQ-ACK bits.
  • the HARQ-ACK for a transport block is also referred to as the HARQ-ACK for the PDSCH.
  • HARQ-ACK for the PDSCH may refer to the HARQ-ACK for the transport block included in the PDSCH.
  • the scheduling request may be used to request UL-SCH resources for the initial transmission.
  • the scheduling request bit may be used to indicate either a positive SR or a negative SR.
  • a positive SR is transmitted (communicated)
  • a positive SR may indicate that UL-SCH resources for the initial transmission are requested by the terminal device 1.
  • a negative SR is transmitted (communicated)”.
  • a negative SR may indicate that UL-SCH resources for the initial transmission are not requested by the terminal device 1.
  • the channel state information may include some or all of a Channel Quality Indicator (CQI), a Precoder Matrix Indicator (PMI), and a Rank Indicator (RI).
  • CQI is an indicator related to the quality of the propagation path (e.g., propagation strength) or the quality of the physical channel
  • PMI is an indicator related to the precoder
  • RI is an indicator related to the transmission rank (or the number of transmission layers).
  • the channel state information is an indicator regarding the reception state of a physical signal (e.g., CSI-RS) used for channel measurement.
  • the value of the channel state information may be determined by the terminal device 1 based on the reception state assumed by the physical signal used for channel measurement.
  • the channel measurement may include interference measurement.
  • the PUCCH may be accompanied by a PUCCH format.
  • the PUCCH format may be the format of the physical layer processing of the PUCCH.
  • the PUCCH format may also be the format of the information transmitted using the PUCCH.
  • the PUSCH may be transmitted to transmit uplink control information and/or a transport block.
  • the PUSCH may be used to transmit uplink control information and/or a transport block.
  • the PUSCH may be used to transmit at least some or all of the transport block, HARQ-ACK, channel state information, and scheduling request.
  • the PUSCH is used at least to transmit the random access message 3.
  • the PUSCH may be used to transmit information not described above.
  • the terminal device 1 may transmit a PUSCH in which the uplink control information and/or a transport block is arranged.
  • the base station device 3 may receive a PUSCH in which the uplink control information and/or a transport block is arranged.
  • the PRACH may be transmitted to convey the index of the random access preamble (random access message 1).
  • the terminal device 1 may transmit the PRACH.
  • the base station device 3 may receive the PRACH.
  • the terminal device 1 may transmit the random access preamble on the PRACH.
  • the base station device 3 may receive the random access preamble on the PRACH.
  • the PRACH is used at least to transmit the random access preamble (random access message 1).
  • the PRACH may be used at least to indicate some or all of the initial connection establishment procedure, the handover procedure, the connection re-establishment procedure, synchronization (timing adjustment) for the transmission of the PUSCH, and the request for resources for the PUSCH.
  • the uplink physical signal may correspond to a set of resource elements.
  • the uplink physical signal may not be used to transmit information generated in a higher layer.
  • the uplink physical signal may be used to transmit information generated in a physical layer.
  • the uplink physical signal may be a physical signal used in an uplink component carrier.
  • the radio transceiver unit 10 may transmit the uplink physical signal.
  • the radio transceiver unit 30 may receive the uplink physical signal.
  • some or all of the following uplink physical signals may be used.
  • ⁇ UL DMRS UpLink Demodulation Reference Signal
  • SRS Sounding Reference Signal
  • UL PTRS UpLink Phase Tracking Reference Signal
  • UL DMRS is a general term for DMRS for PUSCH and DMRS for PUCCH.
  • the set of antenna ports for a DMRS for a PUSCH may be given based on the set of antenna ports for the PUSCH.
  • the set of antenna ports for a DMRS for a PUSCH may be the same as the set of antenna ports for the PUSCH.
  • the propagation path of the PUSCH may be estimated from the DMRS for that PUSCH.
  • the set of antenna ports for DMRS for PUCCH may be the same as the set of antenna ports for PUCCH.
  • the propagation path of the PUCCH may be estimated from the DMRS for that PUCCH.
  • the downlink physical channel may correspond to a set of resource elements that convey information generated in a higher layer.
  • the downlink physical channel may be a physical channel used in a downlink component carrier.
  • the radio transceiver unit 30 may transmit the downlink physical channel.
  • the radio transceiver unit 10 may receive the downlink physical channel.
  • some or all of the following downlink physical channels may be used.
  • PBCH Physical Broadcast Channel
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • the PBCH is transmitted to convey the Master Information Block (MIB) and/or physical layer control information.
  • MIB Master Information Block
  • the physical layer control information is information generated in the physical layer.
  • the MIB is an RRC message delivered from higher layers on the BCCH (Broadcast Control CHannel).
  • the PDCCH is used at least for transmitting (transmitting) downlink control information (DCI).
  • DCI downlink control information
  • the downlink control information may be placed in the PDCCH.
  • the terminal device 1 may receive the PDCCH in which the downlink control information is placed.
  • the base station device 3 may transmit the PDCCH in which the downlink control information is placed.
  • the downlink control information may be transmitted with a DCI format.
  • the DCI format may be interpreted as a format of the downlink control information.
  • the DCI format may also be interpreted as a set of downlink control information set to a certain downlink control information format.
  • the base station device 3 may notify the terminal device 1 of the downlink control information using a PDCCH with a DCI format.
  • the terminal device 1 may monitor the PDCCH to acquire the downlink control information.
  • the DCI format and the downlink control information may be described as equivalent.
  • the base station device 3 may transmit the downlink control information to the terminal device 1 by including it in the DCI format.
  • the terminal device 1 may control the radio transceiver unit 10 using the downlink control information included in the detected DCI format.
  • the downlink control information may include at least one of a downlink grant (DL grant) or an uplink grant (UL grant).
  • the DCI format used for scheduling the PDSCH is also referred to as the downlink DCI format.
  • the DCI format used for scheduling the PUSCH is also referred to as the uplink DCI format.
  • the downlink grant is also referred to as a downlink assignment (DL assignment) or a downlink allocation (DL allocation).
  • DCI format 0_0, DCI format 0_1, DCI format 1_0, and DCI format 1_1 are DCI formats.
  • the uplink DCI format is a general term for DCI format 0_0 and DCI format 0_1.
  • the downlink DCI format is a general term for DCI format 1_0 and DCI format 1_1.
  • DCI format 0_0 is used for scheduling a PUSCH placed in a certain cell.
  • DCI format 0_1 is used for scheduling a PUSCH placed in a certain cell.
  • DCI format 1_0 is used for scheduling a PDSCH placed in a certain cell.
  • DCI format 1_1 is used for scheduling a PDSCH placed in a certain cell.
  • the DCI format may include an Identifier for DCI formats field indicating whether the DCI format is an uplink DCI format or a downlink DCI format.
  • the DCI format may include a Frequency domain resource assignment field indicating a frequency domain resource assignment.
  • the DCI format may include a Time domain resource assignment field indicating a time domain resource assignment.
  • the DCI format may include a Frequency hopping flag field indicating whether frequency hopping is applied or not.
  • the DCI format may include an MCS field indicating one or both of the modulation scheme and the target coding rate of the channel.
  • the DCI format may include a CSI request field indicating an instruction for reporting CSI.
  • the DCI format may include a BWP field indicating the BWP in which the channel is located.
  • the DCI format may include a PDSCH_HARQ feedback timing indicator field (PDSCH to HARQ feedback timing indicator field) indicating the timing at which the HARQ-ACK is transmitted.
  • the DCI format may include a PUCCH resource indicator field (PUCCH resource indicator field) indicating the PUCCH resource. Note that various DCI formats may further include fields different from the above-mentioned fields.
  • the downlink grant is used at least for scheduling one PDSCH in one serving cell.
  • the downlink grant is used at least for scheduling a PDSCH in the same slot in which the downlink grant is transmitted.
  • the downlink grant may be used for scheduling a PDSCH in a slot different from the slot in which the downlink grant is transmitted.
  • the uplink grant is used at least for scheduling one PUSCH in one serving cell.
  • the PDSCH may be transmitted to transmit a transport block.
  • the PDSCH may be used to transmit a transport block.
  • the transport block may be placed in the PDSCH.
  • the base station device 3 may transmit the PDSCH in which the transport block is placed.
  • the terminal device 1 may receive the PDSCH in which the transport block is placed.
  • the downlink physical signal may correspond to a set of resource elements.
  • the downlink physical signal may not be used to transmit information generated in a higher layer.
  • the downlink physical signal may be used to transmit information generated in a physical layer.
  • the downlink physical signal may be a physical signal used in a downlink component carrier.
  • the radio transceiver 10 may receive the downlink physical signal.
  • the radio transceiver 30 may transmit the downlink physical signal.
  • at least some or all of the following downlink physical signals may be used.
  • SS Synchronet alphanuent Signal
  • CSI-RS Channel State Information-Reference Signal
  • DL PTRS DownLink Phase Tracking Reference Signal
  • the synchronization signal is used by the terminal device 1 to synchronize the frequency domain and/or time domain of the downlink.
  • the synchronization signal is a general term for the PSS (Primary Synchronization Signal) and the SSS (Secondary Synchronization Signal).
  • An SS block (SS/PBCH block) is composed of at least the PSS, SSS, and some or all of the PBCH.
  • the antenna ports for PSS, SSS, PBCH, and DMRS for PBCH may be the same.
  • the PBCH to which the PBCH symbol is transmitted at a certain antenna port is a DMRS for the PBCH that is placed in the slot to which the PBCH is mapped, and may be estimated by the DMRS for the PBCH included in the SS/PBCH block to which the PBCH belongs.
  • DL DMRS is a general term for DMRS for PBCH, DMRS for PDSCH, and DMRS for PDCCH.
  • the set of antenna ports for a DMRS for a PDSCH may be given based on the set of antenna ports for the PDSCH.
  • the set of antenna ports for a DMRS for a PDSCH may be the same as the set of antenna ports for the PDSCH.
  • the propagation path of a PDSCH may be estimated from the DMRS for the PDSCH. If a set of resource elements on which a PDSCH symbol is transmitted and a set of resource elements on which a DMRS symbol for the PDSCH is transmitted are included in the same precoding resource group (PRG), the PDSCH on which the PDSCH symbol is transmitted at an antenna port may be estimated by the DMRS for the PDSCH.
  • PRG precoding resource group
  • the antenna port for DMRS for PDCCH (DMRS related to PDCCH, DMRS included in PDCCH, DMRS corresponding to PDCCH) may be the same as the antenna port for PDCCH.
  • the propagation path of a PDCCH may be estimated from the DMRS for that PDCCH. If the same precoder is applied (assumed to be applied, assumed to be applied) to a set of resource elements on which a PDCCH symbol is transmitted and a set of resource elements on which a DMRS symbol for that PDCCH is transmitted, the PDCCH on which a PDCCH symbol is transmitted at an antenna port may be estimated by the DMRS for that PDCCH.
  • BCH Broadcast CHannel
  • UL-SCH Uplink-Shared CHannel
  • DL-SCH Downlink-Shared CHannel
  • the BCH of the transport layer may be mapped to the PBCH of the physical layer. That is, the transport block delivered from a higher layer on the BCH of the transport layer may be placed on the PBCH of the physical layer. Also, the UL-SCH of the transport layer may be mapped to the PUSCH of the physical layer.
  • the transport layer may apply Hybrid Automatic Repeat reQuest (HARQ) to the transport block.
  • HARQ Hybrid Automatic Repeat reQuest
  • BCCH Broadcast Control CHannel
  • CCCH Common Control CHannel
  • DCCH Dedicated Control CHannel
  • BCCH may be used to deliver RRC messages including MIBs or RRC messages including system information.
  • CCCH may be used to transmit RRC messages including RRC parameters common to multiple terminal devices 1.
  • CCCH may be used, for example, for terminal devices 1 that are not RRC-connected.
  • DCCH may be used to transmit RRC messages dedicated to a certain terminal device 1.
  • DCCH may be used, for example, for terminal devices 1 that are RRC-connected.
  • the BCCH may be mapped to the BCH or DL-SCH.
  • an RRC message containing MIB information may be delivered to the BCH.
  • An RRC message containing system information other than MIB may be delivered to the DL-SCH.
  • the CCCH may be mapped to the DL-SCH or UL-SCH.
  • an RRC message mapped to the CCCH may be delivered to the DL-SCH or UL-SCH.
  • the DCCH may be mapped to the DL-SCH or UL-SCH.
  • an RRC message mapped to the DCCH may be delivered to the DL-SCH or UL-SCH.
  • UL-SCH may be mapped to PUSCH.
  • DL-SCH may be mapped to PDSCH.
  • BCH may be mapped to PBCH.
  • the media access control layer processing unit 15 may implement a random access procedure.
  • the media access control layer processing unit 15 may select a RACH occasion for transmitting a random access preamble.
  • downlink control information including a downlink grant or an uplink grant is transmitted and received on the PDCCH, including the C-RNTI (Cell-Radio Network Temporary Identifier).
  • C-RNTI Cell-Radio Network Temporary Identifier
  • a physical channel may be mapped to a serving cell.
  • a physical channel may be mapped to a BWP that is configured on a carrier included in a serving cell.
  • the terminal device 1 may be configured with one or more control resource sets (CORESET: Control Resource SET).
  • the terminal device 1 monitors the PDCCH in one or more control resource sets.
  • monitoring the PDCCH in one or more control resource sets may include monitoring one or more PDCCHs corresponding to each of the one or more control resource sets.
  • the PDCCH may include one or more PDCCH candidates and/or a set of PDCCH candidates.
  • monitoring the PDCCH may include monitoring and detecting the PDCCH and/or a DCI format transmitted via the PDCCH.
  • control resource sets may be configured in the terminal device 1, and each control resource set may be assigned an index (control resource set index).
  • One or more control channel elements (CCEs) may be configured within the control resource set, and each CCE may be assigned an index (CCE index).
  • the set of PDCCH candidates monitored by terminal device 1 is defined in terms of a search space. In other words, the set of PDCCH candidates monitored by terminal device 1 is given by the search space.
  • the search space may be configured to include one or more PDCCH candidates of one or more aggregation levels.
  • the aggregation level of a PDCCH candidate may indicate the number of CCEs that make up the PDCCH.
  • a PDDCH candidate may be mapped to one or more CCEs.
  • the search area set may be configured to include at least one or more search areas. Each search area may be assigned an index (search area index).
  • Each of the search area sets may be associated with at least one control resource set. Each of the search area sets may be included in one control resource set. For each of the search area sets, an index of the control resource set associated with the search area set may be given.
  • the terminal device 1 can detect the PDCCH and/or DCI for the terminal device 1 by blindly detecting PDCCH candidates included in a search space within a control resource set.
  • the number of resource blocks refers to the number of resource blocks in the frequency domain.
  • the terminal device 1 transmits uplink control information (UCI) to the base station device 3.
  • the terminal device 1 may multiplex the UCI onto a PUCCH and transmit it.
  • the terminal device 1 may multiplex the UCI onto a PUSCH and transmit it.
  • the UCI may include at least one of downlink channel state information (Channel State Information: CSI), a scheduling request (Scheduling Request: SR) indicating a request for PUSCH resources, and a Hybrid Automatic Repeat request ACKnowledgement (HARQ-ACK) for downlink data (Transport block, Medium Access Control Protocol Data Unit: MAC PDU, Downlink-Shared Channel: DL-SCH, Physical Downlink Shared Channel: PDSCH).
  • CSI Downlink channel state information
  • SR scheduling request
  • HARQ-ACK Hybrid Automatic Repeat request ACKnowledgement
  • HARQ-ACK may also be referred to as ACK/NACK, HARQ feedback, HARQ-ACK feedback, HARQ response, HARQ-ACK response, HARQ information, HARQ-ACK information, HARQ control information, and HARQ-ACK control information.
  • the HARQ-ACK may include at least a HARQ-ACK bit corresponding to at least one transport block.
  • the HARQ-ACK bit may indicate an ACK (ACKnowledgement) or a NACK (Negative-ACKnowledgement) corresponding to one or more transport blocks.
  • the HARQ-ACK may include at least a HARQ-ACK codebook including one or more HARQ-ACK bits.
  • the HARQ-ACK bit corresponding to one or more transport blocks may correspond to a PDSCH including the one or more transport blocks.
  • HARQ control for one transport block may be referred to as an HARQ process.
  • One HARQ process identifier may be given for each HARQ process.
  • the DCI format includes a field indicating the HARQ process identifier (HARQ process number).
  • An NDI (New Data Indicator) is indicated in the DCI format for each HARQ process.
  • an NDI field is included in a DCI format (DL assignment) that includes scheduling information for PDSCH.
  • the NDI field is 1 bit.
  • the terminal device 1 stores (stores) an NDI value for each HARQ process.
  • the base station device 3 stores (stores) an NDI value for each HARQ process for each terminal device 1.
  • the terminal device 1 updates the stored NDI value using the NDI field of the detected DCI format.
  • the base station device 3 sets the updated NDI value or the non-updated NDI value in the NDI field of the DCI format and transmits it to the terminal device 1.
  • the terminal device 1 updates the stored NDI value using the NDI field of the detected DCI format for the HARQ process corresponding to the value of the HARQ process identifier field of the detected DCI format.
  • the terminal device 1 determines whether the received transport block is a new transmission or a retransmission based on the value of the NDI field of the DCI format (DL assignment).
  • the terminal device 1 compares the value of the NDI field of the detected DCI format with the value of the NDI previously received for the transport block of a certain HARQ process, and if the value is toggled, determines that the received transport block is a new transmission.
  • the base station device 3 transmits a transport block of a new transmission in a certain HARQ process, it toggles the value of the NDI stored for the HARQ process and transmits the toggled NDI to the terminal device 1.
  • the base station device 3 When the base station device 3 transmits a transport block of a retransmission in a certain HARQ process, it does not toggle the value of the NDI stored for the HARQ process, and transmits the untoggled NDI to the terminal device 1.
  • the terminal device 1 compares the value of the NDI field of the detected DCI format with the value of the NDI previously received for the transport block of a certain HARQ process, and if the value is not toggled (they are the same), it determines that the received transport block is a retransmission. Note that toggling here means switching between different values.
  • the terminal device 1 may report HARQ-ACK information to the base station device 3 using a HARQ-ACK codebook in a slot indicated by the value of the HARQ indication field included in DCI format 1_0 corresponding to PDSCH reception or DCI format 1_1.
  • the terminal device 1 may report HARQ-ACK information for PDSCH reception in slot n by using PUCCH transmission and/or PUSCH transmission in slot n+k.
  • k may be the number of slots indicated by the HARQ indication field included in the DCI format corresponding to the PDSCH reception. Also, if the HARQ indication field is not included in the DCI format, k may be given by a higher layer parameter.
  • the upper layer parameters are parameters included in the upper layer signal.
  • the upper layer signal may be RRC (Radio Resource Control) signaling or MAC CE (Medium Access Control Control Element).
  • the upper layer signal may be an RRC layer signal or a MAC layer signal.
  • the higher layer signal may be a common RRC signaling.
  • the common RRC signaling may include at least some or all of the following features C1 to C3.
  • Feature C1) Mapped to a BCCH logical channel or a CCCH logical channel Feature C2) Includes at least a radioResourceConfigCommon information element Feature C3) Mapped to a PBCH
  • the radioResourceConfigCommon information element may include information indicating a configuration commonly used in the serving cells.
  • the configuration commonly used in the serving cells may include at least a RACH configuration.
  • the RACH configuration may at least indicate one or more random access preamble indices.
  • the RACH configuration may at least indicate a time/frequency resource of a PRACH.
  • the information indicating the RACH setting includes information indicating the RACH occasion.
  • the RACH occasion may be indicated in the form of a PRACH Configuration Index.
  • the PRACH Configuration includes the RACH preamble format, a Starting symbol indicating the starting position of the symbol in which the RACH is placed within the Slot, the PRACH duration, the RACH occasion, etc. Multiple PRACH Configurations are configured in advance, and an index called a PRACH Configuration Index is assigned to each PRACH Configuration.
  • the RACH occasion is indicated by information indicating the subframe number in which the RACH is placed. Note that the PRACH Configuration indicates the RACH occasion for 10 subframes, and the RACH occasion is repeated every 10 subframes.
  • the information indicating the RACH settings includes information indicating the number of RACH occasions per SSB (ssb-perRACH-OccasionAndCB-PreamblesPerSSB). For example, 8 RACH occasions, or 4 RACH occasions, or 2 RACH occasions, or 1 RACH occasion are supported per SSB. For example, 1 RACH occasion is supported for every 2 SSBs. For example, 1 RACH occasion is supported for every 4 SSBs. For example, 1 RACH occasion is supported for every 8 SSBs. For example, 1 RACH occasion is supported for every 16 SSBs.
  • the information indicating the RACH settings (configuration) includes information indicating the number of random access preambles (Contention Based preambles) per SSB.
  • each SSB can support 4, 8, 12, 16, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, or 64 random access preambles (Contention Based preambles).
  • the higher layer signaling may be dedicated RRC signaling.
  • the dedicated RRC signaling may comprise at least some or all of the following features D1 to D2: Feature D1) Mapped to DCCH logical channel Feature D2) Includes at least radioResourceConfigDedicated information element
  • the radioResourceConfigDedicated information element may include at least information indicating a setting specific to the terminal device 1.
  • the radioResourceConfigDedicated information element may include at least information indicating a BWP setting.
  • the BWP setting may indicate at least the frequency resource of the BWP.
  • the MIB, the first system information, and the second system information may be included in the common RRC signaling.
  • an upper layer message that is mapped to the DCCH logical channel and includes at least radioResourceConfigCommon may be included in the common RRC signaling.
  • an upper layer message that is mapped to the DCCH logical channel and does not include the radioResourceConfigCommon information element may be included in the dedicated RRC signaling.
  • an upper layer message that is mapped to the DCCH logical channel and includes at least the radioResourceConfigDedicated information element may be included in the dedicated RRC signaling.
  • the first system information may include at least information related to RACH resources.
  • the first system information may include information indicating a random access configuration (RACH settings).
  • the first system information may include at least information related to an initial connection setting.
  • the second system information may be system information other than the first system information.
  • the radioResourceConfigDedicated information element may include at least information related to RACH resources.
  • the radioResourceConfigDedicated information element may include at least information related to the initial connection setup.
  • the information related to the reception of the PDCCH may include information related to an ID indicating the destination of the PDCCH.
  • the ID indicating the destination of the PDCCH may be an ID used for scrambling the CRC bits added to the PDCCH.
  • the ID indicating the destination of the PDCCH is also referred to as an RNTI (Radio Network Temporary Identifier).
  • the information related to the reception of the PDCCH may include information related to an ID used for scrambling the CRC bits added to the PDCCH.
  • the terminal device 1 can attempt to receive the PDCCH based at least on the information related to the ID included in the PBCH.
  • the RNTI may include a Common-RNTI (C-RNTI), a Temporary C-RNTI (TC-RNTI), and a Random Access-RNTI (RA-RNTI).
  • C-RNTI is used at least for scheduling user data for an RRC-connected terminal device 1.
  • the Temporary C-RNTI is used at least for scheduling a random access message 4.
  • the Temporary C-RNTI is used at least for scheduling a PDSCH including data that is mapped to a CCCH in a logical channel.
  • the RA-RNTI is used at least for scheduling a random access message 2.
  • the PDSCH is used at least to transmit/receive transport blocks.
  • the PDSCH may be used at least to transmit/receive random access message 2 (random access response).
  • the PDSCH may be used at least to transmit/receive system information including parameters used for initial access.
  • the PDSCH may be used at least to transmit/receive random access message 4.
  • FIG. 5 is a diagram showing an example of an initial connection procedure (4-step contention based RACH procedure) according to one aspect of this embodiment.
  • the initial connection procedure includes at least a part of steps 5101 to 5104.
  • the terminal device 1 Before performing step 5101, the terminal device 1 performs downlink time-frequency synchronization.
  • a synchronization signal (SSB) is used by the terminal device 1 to perform downlink time-frequency synchronization.
  • the terminal device 1 uses the synchronization signal transmitted from the base station device 3.
  • the synchronization signal may be transmitted including the ID of the target cell (cell ID).
  • the synchronization signal may be transmitted including a sequence generated based at least on the cell ID. Including the cell ID in the synchronization signal may mean that the sequence of the synchronization signal is provided based on the cell ID.
  • the synchronization signal may be beamed and transmitted.
  • Beams refer to the phenomenon where antenna gain varies depending on direction. Beams may be provided based at least on the directivity of the antenna. Beams may also be provided based at least on a phase transformation of a carrier signal. Beams may also be provided by applying a precoder.
  • Step 5101 is a step in which the terminal device 1 transmits a RACH to the base station device 3.
  • An SSB and a RACH occasion are associated with each other. Multiple RACH occasions are associated with an SSB.
  • the terminal device 1 recognizes the RACH occasion associated with each SSB from information indicating the RACH setting.
  • the terminal device 1 selects a RACH occasion from which to transmit the RACH from one or more RACH occasions corresponding to the detected SSB.
  • the terminal device 1 transmits the RACH on the selected RACH occasion.
  • Step 5102 is a step in which the base station device 3 responds to the random access message 1 from the terminal device 1.
  • the response is also referred to as a random access message 2.
  • the random access message 2 may be transmitted via a PDSCH.
  • the PDSCH including the random access message 2 is scheduled by the PDCCH.
  • the CRC bits included in the PDCCH may be scrambled by the RA-RNTI.
  • the random access message 2 may be transmitted including a special uplink grant.
  • the special uplink grant is also referred to as a random access response grant.
  • the special uplink grant may be included in the PDSCH including the random access message 2.
  • the random access response grant may include at least a Temporary C-RNTI.
  • Step 5103 is a step in which the terminal device 1 transmits an RRC connection request to the target cell.
  • the RRC connection request is also referred to as a random access message 3.
  • the random access message 3 may be transmitted via a PUSCH scheduled by a random access response grant.
  • the random access message 3 may include an ID used to identify the terminal device 1.
  • the ID may be an ID managed at a higher layer.
  • the ID may be an SAE Temporary Mobile Subscriber Identity (S-TMSI).
  • S-TMSI SAE Temporary Mobile Subscriber Identity
  • the ID may be mapped to a CCCH in a logical channel.
  • Step 5104 is a step in which the base station device 3 transmits a collision resolution message (Contention resolution message) to the terminal device 1.
  • the collision resolution message is also referred to as a random access message 4.
  • the terminal device 1 monitors the PDCCH that schedules the PDSCH including the random access message 4.
  • the random access message 4 may include a collision avoidance ID.
  • the collision avoidance ID is used to resolve collisions in which multiple terminal devices 1 transmit signals using the same radio resources.
  • the collision avoidance ID is also referred to as a UE contention resolution identity.
  • the terminal device 1 that has transmitted the random access message 3 including an ID (e.g., S-TMSI) used to identify the terminal device 1 monitors the random access message 4 including a collision resolution message. If the collision avoidance ID included in the random access message 4 is equal to the ID used to identify the terminal device 1, the terminal device 1 may determine that collision resolution has been successfully completed and set the value of Temporary C-RNTI in the C-RNTI field. The terminal device 1 whose C-RNTI field has the value of Temporary C-RNTI set is considered to have completed the RRC connection.
  • ID e.g., S-TMSI
  • the terminal device 1 transmits, on the PUCCH, a HARQ-ACK, which is the error detection result for the transport block included in the PDSCH that includes the random access message 4.
  • Figure 6 is a diagram showing an example of the configuration of a radio frame according to one aspect of this embodiment.
  • the horizontal axis represents time, and the vertical axis represents frequency.
  • Figure 6(a) shows an example of a case where there is no slot to which SBFD is applied (SBFD slot).
  • SBFD slot shows an example of a case where there is no slot to which SBFD is applied (SBFD slot).
  • downlink slots are configured in the first, second, third, and fourth slots, and an uplink slot is configured in the fifth slot.
  • the downlink slot the entire frequency band is used for transmitting and receiving downlink signals.
  • the uplink slot the entire frequency band is used for transmitting and receiving uplink signals.
  • Figure 6(b) shows a case where an SBFD slot is configured in the fourth slot, downlink slots are configured in the first, second, and third slots, and an uplink slot is configured in the fifth slot.
  • an uplink area (UL subband) is configured in the center area (subband) of the frequency band
  • a downlink area (DL subband) is configured in the upper and lower areas of the frequency domain.
  • a guard band may be configured between the UL subband and the DL subband.
  • Figure 6(c) shows a case where SBFD slots are configured in the third and fourth slots, downlink slots are configured in the first and second slots, and an uplink slot is configured in the fifth slot.
  • Figure 6(d) shows a case where SBFD slots are configured in the second, third, and fourth slots, a downlink slot is configured in the first slot, and an uplink slot is configured in the fifth slot.
  • Figure 6(e) shows a case where SBFD slots are configured in the first, second, third, and fourth slots, and an uplink slot is configured in the fifth slot.
  • Two pieces of information indicating the number of RACH occasions per SSB are configured (set). One is applied to the uplink slot, and the other is applied to the SBFD slot. For the uplink slot, a setting is made so that the number of RACH occasions per SSB is greater than for the SBFD slot. For example, eight RACH occasions are set per SSB for the uplink slot, and four RACH occasions are set per SSB for the SBFD slot.
  • a terminal device 1 that supports SBFD can transmit a RACH in the SBFD slot, but a terminal device 1 that does not support SBFD cannot transmit a RACH in the SBFD slot.
  • Uplink resources can be used efficiently for transmitting and receiving PUSCH, in other words, for transmitting and receiving data.
  • the radio resource control layer processing unit 36 of the base station device 3 sets the number of RACH occasions for each of the two types of SSBs.
  • the radio resource control layer processing unit 36 of the base station device 3 sets the number of RACH occasions for each SSB for the uplink slot and the number of RACH occasions for each SSB for the SBFD slot.
  • the base station device 3 notifies the terminal device 1 of the set parameters.
  • the radio resource control layer processing unit 16 of the terminal device 1 sets the RACH occasion for each SSB for the uplink slot and the RACH occasion for each SSB for the SBFD slot based on the RRC parameters received from the base station device 3.
  • the transmitting unit of the terminal device 1 transmits a RACH (random access preamble) at the set RACH occasion.
  • the terminal device 1 recognizes the RACH occasion in the uplink slot and the RACH occasion in the SBFD slot for the RACH occasion corresponding to the selected SSB.
  • the transmitter of terminal device 1 selects an uplink slot or an SBFD slot, and transmits a RACH (random access preamble) in the RACH occasion of the selected slot.
  • the terminal device 1 receives information indicating the number of RACH occasions per SSB for an uplink slot and information indicating the number of RACH occasions per SSB for an SBFD (SubBand non-overlapping Full Duplex) slot, determines a RACH occasion to be configured in the uplink slot based on the information indicating the number of RACH occasions per SSB for the uplink slot, determines a RACH occasion to be configured in the SBFD slot based on the information indicating the number of RACH occasions per SSB for the SBFD slot, selects a RACH occasion to be configured in the uplink slot or a RACH occasion to be configured in the SBFD slot, and transmits a random access preamble in the selected RACH occasion.
  • SBFD SubBand non-overlapping Full Duplex
  • the base station device 3 determines the RACH occasion configured in the uplink slot, determines the RACH occasion configured in the SBFD slot, transmits information indicating the number of RACH occasions per SSB for the uplink slot and information indicating the number of RACH occasions per SSB for the SBFD slot, and detects the random access preamble in the RACH occasion configured in the uplink slot and the RACH occasion configured in the SBFD slot.
  • the programs operating in the base station device 3 and terminal device 1 relating to one aspect of the present invention may be programs (programs that cause a computer to function) that control a CPU (Central Processing Unit) or the like so as to realize the functions of the above-described embodiment relating to one aspect of the present invention.
  • Information handled by these devices is temporarily stored in a RAM (Random Access Memory) during processing, and is then stored in various ROMs such as a Flash ROM (Read Only Memory) or an HDD (Hard Disk Drive), and is read, modified, and written by the CPU as necessary.
  • a part of the terminal device 1 and the base station device 3 in the above-mentioned embodiment may be realized by a computer.
  • the program for realizing this control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read into a computer system and executed to realize the control function.
  • the "computer system” referred to here is a computer system built into the terminal device 1 or base station device 3, and includes hardware such as the OS and peripheral devices. Additionally, “computer-readable recording media” refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, as well as storage devices such as hard disks built into the computer system.
  • “computer-readable recording medium” may include something that dynamically holds a program for a short period of time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, or something that holds a program for a certain period of time, such as volatile memory inside a computer system that serves as a server or client in such a case.
  • the above program may be one that realizes part of the functions described above, and may further be one that can realize the functions described above in combination with a program already recorded in the computer system.
  • the terminal device 1 may be composed of at least one processor and at least one memory including computer program instructions (computer program).
  • the memory and computer program instructions (computer program) may be configured to cause the terminal device 1 to perform the operations and processes described in the above embodiments using the processor.
  • the base station device 3 may be composed of at least one processor and at least one memory including computer program instructions (computer program).
  • the memory and computer program instructions (computer program) may be configured to cause the base station device 3 to perform the operations and processes described in the above embodiments using the processor.
  • the base station device 3 in the above-described embodiment can also be realized as a collection (device group) consisting of multiple devices. Each of the devices constituting the device group may have some or all of the functions or functional blocks of the base station device 3 related to the above-described embodiment. It is sufficient for the device group to have all of the functions or functional blocks of the base station device 3.
  • the terminal device 1 related to the above-described embodiment can also communicate with the base station device as a collection.
  • the base station device 3 in the above-mentioned embodiments may be EUTRAN (Evolved Universal Terrestrial Radio Access Network) and/or NG-RAN (NextGen RAN, NR RAN).Furthermore, the base station device 3 in the above-mentioned embodiments may have some or all of the functions of an upper node for eNodeB and/or gNB.
  • EUTRAN Evolved Universal Terrestrial Radio Access Network
  • NG-RAN NextGen RAN, NR RAN
  • gNB NextGen RAN
  • some or all of the terminal device 1 and base station device 3 may be realized as an LSI, which is typically an integrated circuit, or may be realized as a chip set. Each functional block of the terminal device 1 and base station device 3 may be individually formed into a chip, or some or all may be integrated into a chip.
  • the integrated circuit method is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. Furthermore, if an integrated circuit technology that can replace LSI appears due to advances in semiconductor technology, it is also possible to use an integrated circuit based on that technology.
  • a terminal device is described as an example of a communication device, but the present invention is not limited to this, and can also be applied to terminal devices or communication devices such as stationary or non-movable electronic devices installed indoors or outdoors, such as AV equipment, kitchen equipment, cleaning/washing equipment, air conditioning equipment, office equipment, vending machines, and other household appliances.
  • One aspect of the present invention can be used, for example, in a communication system, a communication device (e.g., a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (e.g., a communication chip), or a program, etc.
  • a communication device e.g., a mobile phone device, a base station device, a wireless LAN device, or a sensor device
  • an integrated circuit e.g., a communication chip
  • program e.g., a program, etc.
  • Terminal device 3 Base station device 10, 30 Radio transmission/reception unit 11, 31 Antenna unit 12, 32 RF unit 13, 33 Baseband unit 14, 34 Upper layer processing unit 15, 35 Media access control layer processing unit 16, 36 Radio resource control layer processing unit

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Ce dispositif terminal reçoit des informations indiquant le nombre d'occasions RACH pour chaque SSB pour un créneau de liaison montante, et des informations indiquant le nombre d'occasions RACH pour chaque SSB pour un créneau en duplex intégral sans chevauchement de sous-bande (SBFD), détermine des occasions RACH configurées dans le créneau de liaison montante sur la base des informations indiquant le nombre d'occasions RACH pour chaque SSB pour le créneau de liaison montante, détermine des occasions RACH configurées dans le créneau SBFD sur la base des informations indiquant le nombre d'occasions RACH pour chaque SSB pour le créneau SBFD, sélectionne une occasion RACH configurée dans le créneau de liaison montante ou une occasion RACH configurée dans le créneau SBFD, et transmet un préambule d'accès aléatoire sur l'occasion RACH sélectionnée.
PCT/JP2023/037894 2023-02-28 2023-10-19 Dispositif terminal, dispositif de station de base et procédé de communication WO2024180811A1 (fr)

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JP2023029908A JP2024122391A (ja) 2023-02-28 2023-02-28 端末装置、基地局装置および通信方法
JP2023-029908 2023-02-28

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022015760A2 (fr) * 2020-07-16 2022-01-20 Qualcomm Incorporated Communication sans fil utilisant plusieurs parties de bande passante actives
WO2023018122A1 (fr) * 2021-08-11 2023-02-16 Samsung Electronics Co., Ltd. Procédé et appareil de réalisation d'un accès aléatoire sur la base d'un système duplex intégral dans un système de communication sans fil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022015760A2 (fr) * 2020-07-16 2022-01-20 Qualcomm Incorporated Communication sans fil utilisant plusieurs parties de bande passante actives
WO2023018122A1 (fr) * 2021-08-11 2023-02-16 Samsung Electronics Co., Ltd. Procédé et appareil de réalisation d'un accès aléatoire sur la base d'un système duplex intégral dans un système de communication sans fil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TAO CHEN, MEDIATEK INC.: "Discussion on subband non-overlapping full duplex for NR", 3GPP DRAFT; R1-2301594; TYPE DISCUSSION; FS_NR_DUPLEX_EVO, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. 3GPP RAN 1, no. Athens, GR; 20230227 - 20230303, 18 February 2023 (2023-02-18), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052248724 *

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