WO2024075231A1 - Terminal, station de base et procédé de communication - Google Patents

Terminal, station de base et procédé de communication Download PDF

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Publication number
WO2024075231A1
WO2024075231A1 PCT/JP2022/037341 JP2022037341W WO2024075231A1 WO 2024075231 A1 WO2024075231 A1 WO 2024075231A1 JP 2022037341 W JP2022037341 W JP 2022037341W WO 2024075231 A1 WO2024075231 A1 WO 2024075231A1
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WIPO (PCT)
Prior art keywords
base station
terminal
pdcch
control channel
information
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PCT/JP2022/037341
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English (en)
Japanese (ja)
Inventor
優元 ▲高▼橋
翔平 吉岡
真哉 岡村
真由子 岡野
Original Assignee
株式会社Ｎｔｔドコモ
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Priority to PCT/JP2022/037341 priority Critical patent/WO2024075231A1/fr
Publication of WO2024075231A1 publication Critical patent/WO2024075231A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • 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
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink 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

Definitions

  • the present invention relates to a terminal, a base station, and a communication method in a wireless communication system.
  • Non-Patent Document 1 For NR (New Radio) (also known as “5G”), the successor system to LTE (Long Term Evolution), technologies are being considered that meet the requirements of a large-capacity system, high data transmission speed, low latency, simultaneous connection of many terminals, low cost, and low power consumption (for example, Non-Patent Document 1).
  • future networks e.g., 6G
  • 6G future networks
  • bands above 71 GHz i.e., sub-THz bands such as 100 GHz to 300 GHz
  • a single carrier waveform as the DL (downlink) waveform (which may also be called the modulation method).
  • the control channel is important for communication, it is particularly desirable to realize communication using a DL control channel that applies a single carrier waveform.
  • the present invention has been made in consideration of the above points, and aims to provide a technology for realizing communication using a DL control channel that applies a single carrier waveform.
  • a control unit that determines a size of a frequency resource of a downlink control channel to which a single carrier waveform is applied;
  • a receiving unit that receives information via the downlink control channel assuming a frequency resource of the size is provided.
  • the disclosed technology provides a technique for realizing communication using a DL control channel that uses a single carrier waveform.
  • FIG. 13 is a diagram for explaining processing for single-carrier waveforms and multi-carrier waveforms.
  • FIG. 13 is a diagram illustrating an example of a sequence.
  • FIG. 13 is a diagram illustrating an example of a table in the third embodiment.
  • FIG. 13 is a diagram illustrating an example of a table in the fourth embodiment.
  • FIG. 13 is a diagram illustrating an example of a table in the fifth embodiment.
  • FIG. 13 is a diagram illustrating an example of a table in the fifth embodiment.
  • FIG. 13 is a diagram illustrating an example of mapping in the fifth embodiment.
  • FIG. 13 is a diagram for explaining processing for single-carrier waveforms and multi-carrier waveforms.
  • FIG. 13 is a diagram illustrating an example of a sequence.
  • FIG. 13 is a diagram illustrating an example of a table in the third embodiment.
  • FIG. 13 is a diagram illustrating an example of a table in the fourth embodiment.
  • FIG. 13 is a diagram
  • FIG. 13 is a diagram illustrating an example of mapping in the fifth embodiment.
  • FIG. 13 is a diagram illustrating an example of mapping in the fifth embodiment.
  • FIG. 13 is a diagram illustrating an example of mapping in the fifth embodiment.
  • FIG. 13 is a diagram illustrating an example of mapping in the fifth embodiment.
  • FIG. 13 is a diagram illustrating an example of mapping in the fifth embodiment.
  • FIG. 13 is a diagram illustrating an example of mapping in the fifth embodiment.
  • FIG. 13 is a diagram illustrating an example of mapping in the fifth embodiment.
  • FIG. 13 is a diagram illustrating an example of mapping in the fifth embodiment.
  • FIG. 2 is a diagram illustrating an example of the configuration of a base station 10.
  • FIG. 2 is a diagram illustrating an example of the configuration of a terminal 20.
  • 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention.
  • FIG. 1 is a diagram illustrating an example of the configuration
  • existing technologies are used as appropriate.
  • the existing technologies are, for example, existing LTE or existing NR, but are not limited to existing LTE and NR.
  • the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (e.g., Flexible Duplex, etc.).
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • another method e.g., Flexible Duplex, etc.
  • radio parameters and the like when radio parameters and the like are “configured,” this may mean that predetermined values are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are configured.
  • FIG. 1 is a diagram showing a configuration example (1) of a wireless communication system in an embodiment of the present invention.
  • the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20.
  • FIG. 1 shows one base station 10 and one terminal 20, this is an example, and there may be multiple of each.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • the physical resources of a wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks.
  • the base station 10 transmits a synchronization signal and system information to the terminal 20.
  • the synchronization signal is, for example, NR-PSS and NR-SSS.
  • the system information is, for example, transmitted by NR-PBCH and is also called broadcast information.
  • the synchronization signal and system information may be called SSB (SS/PBCH block).
  • the SSB may be called a synchronization signal or a synchronization signal block.
  • the base station 10 transmits a control signal or data to the terminal 20 in DL (Downlink) and receives a control signal or data from the terminal 20 in UL (Uplink).
  • Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming.
  • both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL.
  • both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) using CA (Carrier Aggregation).
  • the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).
  • SCell Secondary Cell
  • PCell Primary Cell
  • CA Carrier Aggregation
  • the terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, an IoT terminal, or a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 in DL and transmits control signals or data to the base station 10 in UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10, and performs measurement of the propagation path quality based on the reception results of the reference signals.
  • a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, an IoT terminal, or a communication module for M2M (Machine-to-Machine).
  • M2M Machine-to-Machine
  • the terminal 20 is capable of performing carrier aggregation, which bundles multiple cells (multiple CCs (Component Carriers)) together to communicate with the base station 10.
  • carrier aggregation one PCell (Primary cell) and one or more SCells (Secondary cells) are used.
  • a PUCCH-SCell having a PUCCH may also be used.
  • FIG. 2 is a diagram for explaining an example (2) of a wireless communication system in an embodiment of the present invention.
  • FIG. 2 shows an example of the configuration of a wireless communication system when DC (Dual connectivity) is implemented.
  • a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided.
  • Base station 10A and base station 10B are each connected to a core network.
  • Terminal 20 can communicate with both base station 10A and base station 10B.
  • the cell group provided by base station 10A which is an MN
  • the MCG Master Cell Group
  • the cell group provided by base station 10B which is an SN
  • the SCG Secondary Cell Group
  • the MCG is composed of one PCell and one or more SCells
  • the SCG is composed of one PSCell (Primary SCG Cell) and one or more SCells.
  • processing operations in this embodiment may be executed in the system configuration shown in FIG. 1, in the system configuration shown in FIG. 2, or in other system configurations.
  • "/" means “or” unless otherwise specified or unless it is clear from the context that it has a different meaning.
  • future networks e.g., 6G
  • 6G future networks
  • bands above 71 GHz i.e., sub-THz bands such as 100 GHz to 300 GHz
  • the high frequency bands mentioned above have the following characteristics (1) to (4), for example.
  • a wide bandwidth can be used.
  • the radio waves have a high degree of directionality, resulting in low frequency selectivity.
  • Doppler shift is large.
  • CP-OFDM multi-carrier modulation methods
  • the advantages of multi-carrier are small in high frequency bands. Therefore, it is desirable to use a single-carrier modulation method (e.g., DFT-s-OFDM, pure single carrier) in high frequency bands.
  • a single-carrier modulation method e.g., DFT-s-OFDM, pure single carrier
  • control channel is important for proper communication, but in conventional technology, the design of the DL control channel is not clear. Therefore, in this embodiment, the design (configuration, operation, etc.) of the DL control channel that applies the single carrier modulation method is described.
  • the multi-carrier modulation method is referred to as the multi-carrier waveform
  • the single-carrier modulation method is referred to as the single-carrier waveform.
  • both the single-carrier modulation method and the single-carrier waveform can also be referred to as DFT-s-OFDM, pure single carrier, or transform precoding.
  • NSA Non-Stand Alone
  • CA Carrier waveform
  • NR CC component carrier
  • the CC of the DL single carrier waveform may be operated independently of the NR.
  • the slot format of the CC of the DL single carrier waveform may be determined independently of the slot format of the CC in the NR.
  • the first to fifth embodiments will be described below. Each of the first to fifth embodiments may be implemented alone, or any two or more of the embodiments may be combined, or all of the embodiments may be combined.
  • the DL control channel in the following description is assumed to be a PDCCH, but is not limited to a PDCCH.
  • the frequency band in which the DL control channel to which a single carrier waveform is applied is a high frequency band of 71 GHz or higher (i.e., sub-THz band such as 100 GHz to 300 GHz), but is not limited to this assumption.
  • a downlink control channel to which a single carrier waveform is applied may be used in a frequency band lower than the high frequency band.
  • FIG. 3 shows the processing contents (processing blocks) at the base station 10 for multi-carrier waveforms and single-carrier waveforms, which are common to the first to fifth embodiments.
  • FIG. 3(a) shows the processing when transmitting a DL control channel to which a multi-carrier waveform is applied. The transmission data is mapped to resources, IFFT is performed, a CP is inserted, and transmission is performed.
  • Figure 3(b) shows the processing when transmitting a DL control channel using a single-carrier waveform. Compared to Figure 3(a), it differs from the processing of a multi-carrier waveform in that transform precoding is added before resource mapping.
  • Transform precoding spreads the transmitted data to reduce the PAPR.
  • Transform precoding is equivalent to DFT (Digital Fourier Transform).
  • the receiving side obtains information by performing the reverse process of the process shown in Figures 3(a) and (b).
  • first to fifth embodiments are directed to DL control channels
  • contents described below for DL control channels may also be applied to other DL channels or DL signals.
  • the first embodiment will be described.
  • the judgment (which may be called a criterion) of whether or not to apply a single carrier waveform to the DL control channel will be described.
  • the following options 1 to 4 are available as operation options, and each of them will be described. Any of a plurality of the following options 1 to 4 may be combined for implementation. Also, which of the options 1 to 4 is to be applied may be specified in the specifications, or may be set/notified to the terminal 20 by the base station 10.
  • the method of setting/notifying the information may be any one of MIB, SIB, RRC, MAC CE, and DCI, or any combination of multiple of these.
  • multiple combinations for example, multiple pieces of information may be set/notified from the base station 10 to the terminal 20 by RRC, and any one of the multiple pieces of information may be activated by MAC CE or DCI.
  • the terminal 20 uses the activated information.
  • ⁇ Option 1> in the high frequency band assumed in this embodiment (for example, referred to as a frequency range FRx), a single carrier waveform is always applied to all DL control channels (for example, PDCCH).
  • DL control channels for example, PDCCH
  • the base station 10 transmits information (specifically, control information) to the terminal 20 via a DL control channel in the FRx carrier (which may be a CC), the base station 10 uses a DL control channel with a single carrier waveform.
  • the terminal 20 receives information from the base station 10 via a DL control channel in the FRx carrier (which may be a CC)
  • the terminal 20 receives the information via the DL control channel, assuming that the information is being transmitted via a DL control channel with a single carrier waveform.
  • transmitting information on a DL control channel /"receiving information on a DL control channel” may be rephrased as “transmitting a DL control channel”/"receiving a DL control channel”, “transmitting a signal on a DL control channel”/"receiving a signal on a DL control channel”, etc.
  • a single carrier waveform is always applied only to one or more specific DL control channels.
  • the specific PDCCH is, for example, a group-common PDCCH or a UE-specific PDCCH, or both a group-common PDCCH and a UE-specific PDCCH.
  • Option 2 may be applied only to the high frequency band (FRx) assumed in this embodiment, or may be applied to a frequency band other than the high frequency band (FRx).
  • the base station 10 determines to use a group-common PDCCH (or a UE-specific PDCCH) with a single carrier waveform, and transmits the information via that group-common PDCCH (or UE-specific PDCCH).
  • the terminal 20 When the terminal 20 receives information from the base station 10 on the group-common PDCCH (or UE-specific PDCCH), it determines that a group-common PDCCH (or UE-specific PDCCH) with a single carrier waveform is being used, and receives the information on that channel, assuming that a group-common PDCCH (or UE-specific PDCCH) with a single carrier waveform is being used.
  • a single carrier waveform is applied to the DL control channel is determined according to the speed (which may be called velocity) at which the terminal 20 moves. For example, when the base station 10 detects that the speed of the terminal 20 is equal to or greater than a predefined threshold, the base station 10 transmits information to the terminal 20 on a DL control channel with a multicarrier waveform. When the base station 10 detects that the speed of the terminal 20 is less than the threshold, the base station 10 transmits information to the terminal 20 on a DL control channel with a single carrier waveform.
  • the terminal 20 when the terminal 20 detects that the speed of the terminal 20 is equal to or greater than a predefined threshold, it receives information from the base station 10 on a DL control channel with a multi-carrier waveform. When the terminal 20 detects that the speed of the terminal 20 is less than the threshold, it receives information from the base station 10 on a DL control channel with a single-carrier waveform.
  • the single-carrier waveform and multi-carrier waveform may be interchanged for threshold-based decisions.
  • ⁇ Option 4> whether or not to apply a single carrier waveform to the DL control channel is configured/notified to the terminal 20 from the base station 10 by MIB or RRC signaling.
  • MIB is used when the terminal 20 is in an RRC IDLE/INACTIVE/CONNECTED state.
  • RRC signaling is used when the terminal 20 is in an RRC CONNECTED state.
  • the base station 10 transmits, by RRC signaling/MIB, information indicating whether or not a single carrier waveform is applied to the DL control channel to the terminal 20. Based on the information received from the base station 10, the terminal 20 determines whether or not a single carrier waveform is applied to the DL control channel transmitted from the base station 10.
  • the information indicating whether to apply a single carrier waveform to the DL control channel may be information indicating whether to perform transform precoding.
  • Option 4-1 and Option 4-2 assume the use of the group-common PDCCH/UE-specific PDCCH in Option 2 above.
  • option 4-1 information as to whether or not to apply a single carrier waveform is configured/notified to the terminal 20 by RRC signaling from the base station 10 separately for group-common DCI (group-common PDCCH) and UE-specific DCI (UE-specific PDCCH).
  • group-common PDCCH group-common PDCCH
  • UE-specific DCI UE-specific PDCCH
  • option 4-2 information as to whether or not to apply a single carrier waveform is configured/notified to the terminal 20 from the base station 10 by RRC signaling, jointly for the group-common DCI (group-common PDCCH) and the UE-specific DCI (UE-specific PDCCH).
  • group-common PDCCH group-common PDCCH
  • UE-specific PDCCH UE-specific PDCCH
  • transform precoding for the DL control channel executed in the base station 10 will be described.
  • the terminal 20 receives (decodes) information transmitted in the DL control channel, assuming that such transform precoding is performed.
  • the process described below basically corresponds to the process disclosed in Non-Patent Document 2, where transform precoding in UL is replaced with DL.
  • transform precoding is not applied (transform precoding is not enabled)
  • the base station 10 When transform precoding is applied, the base station 10 performs transform precoding on a block of complex-valued symbols x(0), . . . , x(M symb ⁇ 1) as follows.
  • MRBPDCCH indicates the bandwidth (number of RBs ) of the PDCCH.
  • NSCRB indicates the number of subcarriers per resource block.
  • the first embodiment can be applied to whether or not to apply transform precoding.
  • the technology according to the second embodiment makes it possible to specifically realize a DL control channel using a single carrier waveform.
  • the PDCCH has one or more control channel elements (CCEs). Specifically, the number of CCEs per PDCCH is determined according to the aggregation level applied to the PDCCH, as shown in the table in Figure 5.
  • CCEs control channel elements
  • the base station 10 transmits a PDCCH at aggregation level 2, the number of CCEs in the PDCCH is set to 2.
  • the terminal 20 receives (decodes) the PDCCH (DCI), for example, assuming each aggregation level (corresponding number of CCEs).
  • control channel element consists of X resource element groups (REGs).
  • One resource element group is equal to one resource block in one OFDM symbol.
  • the REGs in one control resource set are numbered in ascending order in a time-first manner, starting with 0 for the lowest numbered resource block in the first OFDM symbol.
  • X above is, for example, 6. However, X may be a number other than 6.
  • the PDCCH When a single carrier waveform is applied to the PDCCH, the PDCCH does not consist of CCEs but consists of multiple resource blocks. Details of the frequency resources of the PDCCH with a single carrier waveform will be described in the fourth embodiment.
  • the first embodiment can be applied to whether or not to apply a single carrier waveform to the PDCCH.
  • the base station 10 can properly transmit a PDCCH having a multicarrier waveform, and the terminal 20 can properly receive a PDCCH having a multicarrier waveform.
  • a frequency resource of a DL control channel (here, PDCCH is taken as an example) when a single carrier waveform is applied to the PDCCH will be described.
  • PDCCH DL control channel
  • the size of the frequency resource of the PDCCH is the same as the system bandwidth, i.e., the size of the frequency resource of the PDCCH applying the single carrier waveform is equal to the system bandwidth of the serving cell in which the PDCCH is transmitted.
  • the base station 10 determines the bandwidth of the PDCCH to be 100 MHz and transmits information on the PDCCH of that bandwidth.
  • the terminal 20 determines the bandwidth of the PDCCH to be 100 MHz and receives (decodes) information assuming that the PDCCH is being transmitted on a bandwidth of 100 MHz.
  • the size of the frequency resource of the PDCCH (which may also be referred to as the bandwidth) is smaller than the system bandwidth and is equal to a portion of the system bandwidth.
  • the size of the frequency resource of a PDCCH that uses a single carrier waveform is equal to a portion of the system bandwidth of the serving cell in which the PDCCH is transmitted.
  • the size of the frequency resource of the PDCCH is the system bandwidth x K (0 ⁇ K ⁇ 1)
  • 50 MHz is used as the size of the frequency resource of the PDCCH.
  • K is determined, for example, in the specifications. K may be set/instructed to the terminal 20 by the base station 10, as described in Option 3.
  • the "part of the system bandwidth” may also be a BWP (Bandwidth part).
  • the BWP may be, for example, an active BWP.
  • BWP_A is set in terminal 20 (or a group of terminals) as the BWP of the active DL, and the bandwidth of BWP_A is bandwidth A
  • base station 10 determines the bandwidth of the PDCCH to be bandwidth A and transmits information on the PDCCH of bandwidth A.
  • Terminal 20 determines the bandwidth of the PDCCH to be bandwidth A, and receives (decodes) information, assuming that the PDCCH is being transmitted on bandwidth A.
  • information regarding the frequency resource of the PDCCH is configured/notified to the terminal 20 from the base station 10.
  • information regarding the frequency resource of the PDCCH is notified to the terminal 20 from the base station 10 by an MIB. Note that using the MIB is just one example.
  • the size of the frequency resource of the PDCCH to which a single carrier waveform is applied is notified from the base station 10 to the terminal 20 by the MIB. Details of the notification method include option 3-1 and option 3-2 below.
  • the relationship between the information notified by the MIB (here, an index is used as an example) and the frequency resource of the PDCCH is defined in the specifications, etc.
  • the terminal 20 and the base station 10 each hold information representing the relationship and operate according to the information.
  • the information representing the relationship is referred to as a "table" here.
  • the information in this table may be predetermined in the specifications as described above, or may be determined by the base station 10 and set/notified to the terminal 20.
  • Figure 6 shows an example of this table.
  • the table shown in Figure 6 has a row index, a number of RBs indicating the bandwidth of the PDCCH, and an offset (in RBs) from a reference point that corresponds to the start position of the frequency resources of the PDCCH.
  • the reference point is, for example, the start RB of the SSB (i.e., the MIB).
  • the table may also include the number of PDCCH symbols corresponding to the index.
  • An example of operation using the table will be described with reference to the sequence diagram in FIG. 4.
  • the base station 10 transmits an MIB, and the terminal 20 receives the MIB.
  • the MIB includes an index.
  • the terminal 20 reads the index from the MIB and refers to the table to ascertain the frequency resource of the PDCCH corresponding to the index.
  • the base station 10 transmits information on a PDCCH to which a single carrier waveform is applied, using the frequency resource corresponding to the index.
  • the terminal 20 can receive (decode) the PDCCH transmitted from the base station 10 using the frequency resource.
  • the base station 10 notifies the terminal 20 of information on the frequency resource of the PDCCH to which a single carrier waveform is applied, by using a resource indicator value (RIV).
  • the RIV may be transmitted by RRC signaling, may be transmitted by DCI, may be transmitted by MIB, or may be transmitted by MAC CE.
  • a and C are constants defined in specifications, etc.
  • F represents the continuous length of the PDCCH frequency resource (i.e. the number of RBs)
  • S indicates the starting position of the PDCCH frequency resource.
  • RIV one numerical value
  • the terminal 20 determines the frequency resource of the PDCCH based on the RIV received from the base station 10, and performs reception operations assuming that the PDCCH is being transmitted using that frequency resource.
  • information on the frequency resources of the PDCCH is set/notified to the terminal 20 from the base station 10 by higher layer parameters.
  • the higher layer parameters may be set/notified by RRC signaling or by MAC signaling.
  • the size and starting position of the frequency resource of the PDCCH to which a single carrier waveform is applied are set/notified to the terminal 20 by the base station 10 using higher layer parameters.
  • the terminal 20 determines the frequency resource of the PDCCH based on the parameters received from the base station 10, and performs reception operations assuming that the PDCCH is being transmitted using that frequency resource. As more specific processing, options 4-1 and 4-2 are explained below.
  • startingPRB is a parameter in PDCCH-Resource in PDCCH-Config.
  • startingPRB may be a parameter in ControlResourceSet.
  • startingPRB notifies the terminal 20 of the PRB ID indicating the starting position.
  • the length (bandwidth) of the frequency resource of the PDCCH is notified from the base station 10 to the terminal 20 by nrofPRBs, which is a parameter in PDCCH-Resource in PDCCH-Config.
  • nrofPRBs may be a parameter in ControlResourceSet.
  • an integer value indicating the length (number of RBs) of the frequency resource is notified by nrofPRBs.
  • Option 4-2 information (joint configuration) of the start position and length of the frequency resource of the PDCCH is configured/notified.
  • the information is, for example, a bitmap.
  • the starting position and length of the frequency resource of the PDCCH are notified from the base station 10 to the terminal 20 by the frequencyDomainResources, which is a bitmap parameter in the PDCCH-Resource in the PDCCH-Config.
  • frequencyDomainResources may be a bitmap parameter in the ControlResourceSet.
  • the bitmap parameter has multiple bits, each bit representing one or multiple PRB(s). Multiple PRB(s) may be referred to as a PRB group.
  • the most significant bit (MSB) in the bitmap indicates the first PRB (or the first PRB group) in the frequency resources of the PDCCH.
  • bitmaps are '0011111100', '11111111', '11110000', etc.
  • PRB1 is the first bit and 1 bit corresponds to 1 PRB
  • '0011111100' means that PRBs 3 to 8 are used as frequency resources for the PDCCH. Note that this is not limited to consecutive allocations as described above.
  • the base station 10 can properly transmit a PDCCH having a single carrier waveform, and the terminal 20 can properly receive a PDCCH having a single carrier waveform.
  • a mapping method of a reference signal (specifically, DMRS as an example) in a DL control channel (PDCCH is the target here) will be described.
  • a multicarrier waveform PDCCH and a single carrier waveform PDCCH will be described separately. Note that there are option 1 and option 2 for the single carrier waveform PDCCH, and each will be described.
  • the technique described in the first embodiment can be applied to determine whether to use a multi-carrier waveform PDCCH or a single-carrier waveform PDCCH.
  • ⁇ Multi-carrier waveform PDCCH> When using a multicarrier waveform PDCCH, the terminal 20 assumes that the reference signal sequence r l (m) is mapped to resource elements (k, l) p, ⁇ according to the following equation:
  • the mapping of the DMRS is the same as the mapping of the DMRS of the PDCCH disclosed in Non-Patent Document 2.
  • the base station 10 maps the reference signal sequence r l (m) to resource elements (k, l) p, ⁇ in accordance with the above equation and transmits it, and the terminal 20 reads out the reference signal sequence r l (m) based on this mapping assumption.
  • (k, l) p, ⁇ is a resource element with frequency domain index k and time domain index l in antenna port p and subcarrier spacing ⁇ .
  • a k,l (p, ⁇ ) is the value of resource element (k, l) at antenna port p and subcarrier spacing ⁇ .
  • ⁇ is an amplitude scaling coefficient.
  • DMRS DMRS for the PDCCH of a single carrier waveform
  • TDM Time Division Multiplexing
  • the DMRS is mapped over the entire bandwidth of the PDCCH.
  • the DMRS may be mapped to the PDCCH using FDM (frequency division multiplexing).
  • the terminal 20 When using a PDCCH with a single carrier waveform, the terminal 20 assumes that a reference signal sequence r l (m) is mapped to resource elements (k, l) p, ⁇ according to the following equation.
  • the base station 10 maps the reference signal sequence r l (m) to the resource element (k, l) p, ⁇ according to the above formula and transmits it, and the terminal 20 acquires the reference signal sequence r l (m) based on the assumption of this mapping.
  • Each symbol in the formula is as described above.
  • the M SC PDCCH is as shown in "Equation 1".
  • k is defined as the relative value of the lowest-numbered resource block allocated to PDCCH transmission with respect to subcarrier 0.
  • the l (lowercase el) in the above formula is given by a table.
  • the table may be called relationship information.
  • the relationship information may be defined in the specifications, or may be set/notified from the base station 10 to the terminal 20.
  • the table has "PDCCH length and DMRS position in symbol units" in the time domain. Information on additional DMRS may be added to "PDCCH length and DMRS position in symbol units.”
  • options 1 and 2 are explained as examples of DMRS placement. Specific examples of mapping are also explained.
  • Option 1 basically, DMRS symbols are arranged between PDCCH symbols, or DMRS symbols and PDCCH symbols are arranged alternately. That is, the base station 10 transmits the DMRS in the above arrangement, and the terminal 20 reads the DMRS based on the assumption of this arrangement.
  • Figure 7 shows an example of the above table in option 1.
  • Option 2 the DMRS (reference signal sequence r l (m)) is placed in a symbol next to the last symbol of the PDCCH.
  • the base station 10 maps the DMRS to the symbols next to the final symbol of the PDCCH and transmits it, and the terminal 20 reads the DMRS based on this mapping assumption.
  • Figure 8 shows an example of a table for option 2.
  • the technology according to the fifth embodiment allows a reference signal to be appropriately mapped to a DL control channel to which a single carrier waveform is applied.
  • Fig. 18 is a diagram showing an example of the functional configuration of the base station 10.
  • the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140.
  • the functional configuration shown in Fig. 18 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the names of the functional divisions and the functional units may be any.
  • the transmitting unit 110 and the receiving unit 120 may be collectively referred to as a communication unit.
  • the transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly.
  • the receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals.
  • the transmitter 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DCI via PDCCH, data via PDSCH, etc. to the terminal 20.
  • the transmitter 110 can transmit both a DL control channel to which a single carrier waveform is applied and a DL control channel to which a multicarrier waveform is applied.
  • the setting unit 130 stores pre-set setting information and various setting information to be transmitted to the terminal 20 in a storage device provided in the setting unit 130, and reads it from the storage device as necessary.
  • the control unit 140 schedules DL reception or UL transmission of the terminal 20 via the transmission unit 110.
  • the control unit 140 can generate information indicating whether or not to apply a single carrier waveform to the downlink control channel.
  • the control unit 140 can also generate configuration information for the frequency resources of the downlink control channel to which a single carrier waveform is applied. At this time, the transmission unit 110 can transmit the downlink control channel using the frequency resources based on the configuration information.
  • the functional units in the control unit 140 related to signal transmission may be included in the transmitting unit 110, and the functional units in the control unit 140 related to signal reception may be included in the receiving unit 120.
  • the transmitting unit 110 may be called a transmitter
  • the receiving unit 120 may be called a receiver.
  • Fig. 19 is a diagram showing an example of the functional configuration of the terminal 20.
  • the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240.
  • the functional configuration shown in Fig. 19 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the names of the functional divisions and the functional units may be any.
  • the transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.
  • the transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly.
  • the receiver 220 receives various signals wirelessly and obtains higher layer signals from the received physical layer signals.
  • the receiver 220 also has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, DCI via PDCCH, data via PDSCH, etc. transmitted from the base station 10.
  • the transmitting unit 210 may transmit a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), or the like to another terminal 20 as D2D communication, and the receiving unit 220 may receive a PSCCH, a PSSCH, a PSDCH, or a PSBCH, or the like from the other terminal 20.
  • the receiving unit 220 may receive both a DL control channel to which a single carrier waveform is applied and a DL control channel to which a multicarrier waveform is applied.
  • the setting unit 230 stores various setting information received from the base station 10 or other terminals by the receiving unit 220 in a storage device provided in the setting unit 230, and reads it from the storage device as necessary.
  • the setting unit 230 also stores setting information that is set in advance.
  • the control unit 240 controls the terminal 20.
  • the control unit 240 can determine whether or not a single carrier waveform is applied to the downlink control channel.
  • the control unit 240 can also determine the size of the frequency resource of the downlink control channel to which the single carrier waveform is applied.
  • the receiving unit 220 receives information via the downlink control channel, assuming a frequency resource of the size.
  • ⁇ Appendix 1> a control unit that determines whether a single carrier waveform is applied to a downlink control channel; a receiving unit that receives information via the downlink control channel assuming that the single carrier waveform will be applied when it is determined that the single carrier waveform is applied to the downlink control channel.
  • the control unit determines whether or not the single carrier waveform is applied based on whether a specific downlink control channel is used, or determines whether or not the single carrier waveform is applied based on the speed of the terminal.
  • Additional Note 3 The terminal according to claim 1 or 2, wherein the control unit determines whether or not the single carrier waveform is applied based on information received from a base station through an MIB or RRC signaling.
  • a downlink control channel to which the single carrier waveform is applied does not have a control channel element but has a resource block.
  • a control unit that generates information indicating whether or not a single carrier waveform is to be applied to a downlink control channel;
  • a base station comprising: a transmitter that transmits the information to a terminal.
  • Supplementary Items 1 to 6 provide technology for achieving communications using a DL control channel to which a single carrier waveform is applied.
  • Supplementary Item 2 makes it possible to determine whether a single carrier waveform is being applied from various perspectives, such as a specific downlink control channel and speed.
  • Supplementary Item 3 makes it possible to determine whether a single carrier waveform is being applied appropriately based on information from a base station.
  • Supplementary Item 4 makes it possible to appropriately define the characteristics of a downlink control channel to which a single carrier waveform is applied.
  • a control unit that determines a size of a frequency resource of a downlink control channel to which a single carrier waveform is applied;
  • a terminal comprising: a receiving unit that receives information via the downlink control channel, assuming a frequency resource of the size.
  • the control unit determines a system bandwidth or a portion of the system bandwidth as the size.
  • a reference signal is arranged between symbols of the downlink control channel, the symbols of the downlink control channel and the reference signal are arranged alternately, or the reference signal is arranged adjacent to the last symbol of the downlink control channel.
  • a control unit that generates configuration information of a frequency resource of a downlink control channel to which a single carrier waveform is applied; a transmitter unit that transmits the downlink control channel using frequency resources based on the configuration information.
  • the control unit is generating the length of the frequency resource and the starting position of the frequency resource as separate parameters; or The base station according to claim 4, further comprising: generating the length of the frequency resource and the starting position of the frequency resource as one bitmap parameter.
  • Additional Note 6 determining a size of a frequency resource of a downlink control channel to which a single carrier waveform is applied; and receiving information via the downlink control channel, assuming a frequency resource of the size.
  • Supplementary Items 1 to 6 provide techniques for implementing communications using a DL control channel to which a single carrier waveform is applied.
  • Supplementary Item 2 makes it possible to determine an appropriate frequency resource size for a DL control channel to which a single carrier waveform is applied.
  • Supplementary Item 3 makes it possible to appropriately allocate a reference signal for a DL control channel to which a single carrier waveform is applied.
  • Supplementary Item 5 makes it possible to appropriately notify information regarding the frequency resource of a DL control channel to which a single carrier waveform is applied.
  • each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices.
  • the functional blocks may be realized by combining the one device or the multiple devices with software.
  • Functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, regard, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
  • a functional block (component) that performs the transmission function is called a transmitting unit or transmitter.
  • the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 20 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 in one embodiment of the present disclosure.
  • the above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.
  • the term "apparatus" can be interpreted as a circuit, device, unit, etc.
  • the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.
  • the functions of the base station 10 and the terminal 20 are realized by loading specific software (programs) onto hardware such as the processor 1001 and the storage device 1002, causing the processor 1001 to perform calculations, control communications by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
  • the processor 1001 for example, operates an operating system to control the entire computer.
  • the processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, etc.
  • CPU central processing unit
  • control unit 140, control unit 240, etc. may be realized by the processor 1001.
  • the processor 1001 reads out a program (program code), software module, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to the program.
  • the program is a program that causes a computer to execute at least a part of the operations described in the above-mentioned embodiment.
  • the control unit 140 of the base station 10 shown in FIG. 18 may be stored in the storage device 1002 and realized by a control program that runs on the processor 1001.
  • the control unit 240 of the terminal 20 shown in FIG. 19 may be stored in the storage device 1002 and realized by a control program that runs on the processor 1001.
  • the processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from a network via a telecommunication line.
  • the storage device 1002 is a computer-readable recording medium and may be composed of, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc.
  • the storage device 1002 may also be called a register, a cache, a main memory, etc.
  • the storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method relating to one embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc.
  • the above-mentioned storage medium may be, for example, a database, a server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.
  • the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc.
  • the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmitting/receiving antenna, an amplifier unit, a transmitting/receiving unit, a transmission path interface, etc. may be realized by the communication device 1004.
  • the transmitting/receiving unit may be implemented as a transmitting unit or a receiving unit that is physically or logically separated.
  • the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one structure (e.g., a touch panel).
  • each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
  • the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware.
  • the processor 1001 may be implemented using at least one of these pieces of hardware.
  • the terminal 20 or the base station 10 may be provided in the vehicle 2001.
  • FIG. 21 shows an example of the configuration of the vehicle 2001.
  • the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013.
  • the terminal 20 or the base station 10 according to each aspect/embodiment described in this disclosure may be applied to a communication device mounted on the vehicle 2001, for example, may be applied to the communication module 2013.
  • the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
  • the steering unit 2003 includes at least a steering wheel (also called a handlebar), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
  • the electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001.
  • the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
  • Signals from the various sensors 2021-2029 include a current signal from a current sensor 2021 that senses the motor current, a front and rear wheel rotation speed signal obtained by a rotation speed sensor 2022, a front and rear wheel air pressure signal obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.
  • the information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices.
  • the information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.
  • the information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.
  • input devices e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
  • output devices e.g., a display, a speaker, an LED lamp, a touch panel, etc.
  • the driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as a millimeter wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high definition (HD) maps, autonomous vehicle (AV) maps, etc.), a gyro system (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, and AI processor, as well as one or more ECUs that control these devices.
  • the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.
  • the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port.
  • the communication module 2013 transmits and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided on the vehicle 2001.
  • the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication.
  • the communication module 2013 may be located either inside or outside the electronic control unit 2010.
  • the external device may be, for example, a base station, a mobile station, etc.
  • the communication module 2013 may transmit at least one of the signals from the various sensors 2021-2028 described above input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication.
  • the electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input.
  • the PUSCH transmitted by the communication module 2013 may include information based on the above input.
  • the communication module 2013 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001.
  • the information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 2013).
  • the communication module 2013 also stores various information received from an external device in a memory 2032 that can be used by the microprocessor 2031.
  • the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.
  • the operations of multiple functional units may be physically performed by one part, or the operations of one functional unit may be physically performed by multiple parts.
  • the order of processing procedures described in the embodiment may be changed as long as there is no contradiction.
  • the base station 10 and the terminal 20 have been described using functional block diagrams, but such devices may be realized by hardware, software, or a combination thereof.
  • the software operated by the processor possessed by the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor possessed by the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • the notification of information is not limited to the aspects/embodiments described in the present disclosure and may be performed using other methods.
  • the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination of these.
  • RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
  • Each aspect/embodiment described in this disclosure may be a mobile communication system (mobile communications system) for mobile communications over a wide range of networks, including LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal number)), FRA (Future Ra).
  • the present invention may be applied to at least one of systems using IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other appropriate systems, and next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (for example, a combination of at least one
  • certain operations that are described as being performed by the base station 10 may in some cases be performed by its upper node.
  • various operations performed for communication with a terminal 20 may be performed by at least one of the base station 10 and other network nodes other than the base station 10 (such as, but not limited to, an MME or S-GW).
  • the base station 10 may be a combination of multiple other network nodes (such as an MME and an S-GW).
  • the information or signals described in this disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). They may be input and output via multiple network nodes.
  • the input and output information may be stored in a specific location (e.g., memory) or may be managed using a management table.
  • the input and output information may be overwritten, updated, or added to.
  • the output information may be deleted.
  • the input information may be sent to another device.
  • the determination in this disclosure may be based on a value represented by one bit (0 or 1), a Boolean (true or false) value, or a comparison of numerical values (e.g., a comparison with a predetermined value).
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
  • a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
  • wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
  • wireless technologies such as infrared, microwave
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
  • the channel and the symbol may be a signal (signaling).
  • the signal may be a message.
  • the component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.
  • system and “network” are used interchangeably.
  • a radio resource may be indicated by an index.
  • the names used for the above-mentioned parameters are not limiting in any respect. Furthermore, the formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure.
  • the various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any respect.
  • base station BS
  • radio base station base station
  • base station fixed station
  • NodeB eNodeB
  • gNodeB gNodeB
  • access point e.g., "transmission point”
  • gNodeB gNodeB
  • a base station may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.
  • a base station can accommodate one or more (e.g., three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).
  • RRH Remote Radio Head
  • the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
  • a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc.
  • At least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
  • the moving object is a movable object, and the moving speed is arbitrary. It also includes the case where the moving object is stopped.
  • the moving object includes, but is not limited to, for example, a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, an excavator, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcar, a rickshaw, a ship and other watercraft, an airplane, a rocket, an artificial satellite, a drone (registered trademark), a multicopter, a quadcopter, a balloon, and objects mounted thereon.
  • the moving object may also be a moving object that travels autonomously based on an operation command.
  • At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read as a terminal.
  • each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)).
  • the terminal 20 may be configured to have the functions of the base station 10 described above.
  • terms such as "uplink” and "downlink” may be read as terms corresponding to communication between terminals (for example, "side”).
  • the uplink channel, downlink channel, etc. may be read as a side channel.
  • the terminal in this disclosure may be interpreted as a base station.
  • the base station may be configured to have the functions of the terminal described above.
  • determining may encompass a wide variety of actions.
  • Determining and “determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., searching in a table, database, or other data structure), and considering ascertaining as “judging” or “determining.”
  • determining and “determining” may include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and considering ascertaining as “judging” or “determining.”
  • judgment” and “decision” can include considering resolving, selecting, choosing, establishing, comparing, etc., to have been “judged” or “decided.” In other words, “judgment” and “decision” can include considering some action to have been “judged” or “decided.” Additionally, “judgment (decision)” can be interpreted as “assuming,” “ex
  • connection refers to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
  • the coupling or connection between elements may be physical, logical, or a combination thereof.
  • “connected” may be read as "access.”
  • two elements may be considered to be “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.
  • the reference signal may also be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to an element using a designation such as "first,” “second,” etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.
  • a radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
  • Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
  • SCS subcarrier spacing
  • TTI transmission time interval
  • radio frame structure a specific filtering process performed by the transceiver in the frequency domain
  • a specific windowing process performed by the transceiver in the time domain etc.
  • a slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.).
  • a slot may be a time unit based on numerology.
  • a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A.
  • a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.
  • Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Radio frame, subframe, slot, minislot, and symbol may each be referred to by a different name that corresponds to the radio frame, subframe, slot, minislot, and symbol.
  • one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI.
  • TTI transmission time interval
  • the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
  • the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
  • one slot may be called a unit time. The unit time may differ for each cell depending on the numerology.
  • TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
  • a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units.
  • wireless resources such as frequency bandwidth and transmission power that can be used by each terminal 20
  • TTI is not limited to this.
  • the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
  • the time interval e.g., the number of symbols
  • the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit of scheduling.
  • the number of slots (minislots) that constitute the minimum time unit of scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
  • TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
  • a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
  • a short TTI e.g., a shortened TTI, etc.
  • TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
  • the number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12.
  • the number of subcarriers included in an RB may be determined based on the numerology.
  • the time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length.
  • One TTI, one subframe, etc. may each be composed of one or more resource blocks.
  • one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.
  • PRB physical resource block
  • SCG sub-carrier group
  • REG resource element group
  • PRB pair an RB pair, etc.
  • a resource block may be composed of one or more resource elements (REs).
  • REs resource elements
  • one RE may be a radio resource area of one subcarrier and one symbol.
  • a Bandwidth Part which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within the BWP.
  • the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • One or more BWPs may be configured for a UE within one carrier.
  • At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
  • BWP bitmap
  • radio frames, subframes, slots, minislots, and symbols are merely examples.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean “A and B are each different from C.”
  • Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
  • notification of specific information is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).
  • Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive unit 2003 Steering unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheel 2008 Rear wheel 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 Rotational speed sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving assistance system unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (IO port)

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

Abstract

Un terminal selon la présente invention comprend : une unité de commande qui détermine une taille d'une ressource de fréquence d'un canal de commande de liaison descendante auquel une forme d'onde à porteuse unique doit être appliquée ; et une unité de réception qui reçoit des informations par l'intermédiaire du canal de commande de liaison descendante en adoptant une ressource de fréquence de ladite taille.
PCT/JP2022/037341 2022-10-05 2022-10-05 Terminal, station de base et procédé de communication WO2024075231A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018083864A1 (fr) * 2016-11-02 2018-05-11 株式会社Ｎｔｔドコモ Dispositif utilisateur et procédé de transmission de signal de liaison montante
US20180302186A1 (en) * 2017-04-14 2018-10-18 Qualcomm Incorporated Sharing a single coreset bandwidth across multiple user equipments
US20200136767A1 (en) * 2017-06-16 2020-04-30 Telefonaktiebolaget Lm Ericsson (Publ) Transmission or Reception of a Reference Signal in a Wireless Communication System
WO2022201398A1 (fr) * 2021-03-24 2022-09-29 株式会社Ｎｔｔドコモ Dispositif de communication et procédé de transmission

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018083864A1 (fr) * 2016-11-02 2018-05-11 株式会社Ｎｔｔドコモ Dispositif utilisateur et procédé de transmission de signal de liaison montante
US20180302186A1 (en) * 2017-04-14 2018-10-18 Qualcomm Incorporated Sharing a single coreset bandwidth across multiple user equipments
US20200136767A1 (en) * 2017-06-16 2020-04-30 Telefonaktiebolaget Lm Ericsson (Publ) Transmission or Reception of a Reference Signal in a Wireless Communication System
WO2022201398A1 (fr) * 2021-03-24 2022-09-29 株式会社Ｎｔｔドコモ Dispositif de communication et procédé de transmission

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