WO2024209649A1 - 端末、基地局、及び通信方法 - Google Patents

端末、基地局、及び通信方法 Download PDF

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Publication number
WO2024209649A1
WO2024209649A1 PCT/JP2023/014301 JP2023014301W WO2024209649A1 WO 2024209649 A1 WO2024209649 A1 WO 2024209649A1 JP 2023014301 W JP2023014301 W JP 2023014301W WO 2024209649 A1 WO2024209649 A1 WO 2024209649A1
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WIPO (PCT)
Prior art keywords
signal
terminal
low power
information element
base station
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PCT/JP2023/014301
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English (en)
French (fr)
Japanese (ja)
Inventor
大樹 武田
拓真 中村
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NTT Docomo Inc
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NTT Docomo Inc
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Priority to PCT/JP2023/014301 priority Critical patent/WO2024209649A1/ja
Priority to JP2025512342A priority patent/JPWO2024209649A1/ja
Publication of WO2024209649A1 publication Critical patent/WO2024209649A1/ja
Anticipated expiration legal-status Critical
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a terminal, a base station, and a communication method in a wireless communication system.
  • 3GPP registered trademark
  • 3rd Generation Partnership Project 3rd Generation Partnership Project
  • 5G Fifth Generation Partnership Project
  • NR New Radio
  • 5G various wireless technologies and network architectures are being studied to meet the requirements of achieving a throughput of 10 Gbps or more while keeping latency in wireless sections to 1 ms or less (for example, Non-Patent Document 1 and Non-Patent Document 2).
  • 3GPP does not specify the methods for generating and transmitting LP-WUS.
  • LP-WUS needs to be designed with a simple configuration and to meet set requirements.
  • the present invention has been made in consideration of the above points, and aims to specify a method for generating and transmitting LP-WUS in a wireless communication system.
  • a control unit that assumes a low-power wake-up signal using at least one of a first information element indicating a cell identifier or a synchronization signal index, a second information element indicating a terminal identifier or a terminal group identifier, a third information element indicating a format of the low-power wake-up signal, and a fourth information element indicating the position of the time and frequency resources monitored by the low-power wake-up signal, which is related to a generation method or transmission method of the low-power wake-up signal, the first method relating to the generation of a signal sequence, the second method relating to channel coding, rate matching, or scrambling, the third method relating to a modulation method, the fourth method relating to a format, and the fifth method indicating the position of the time and frequency resources monitored by the low-power wake-up signal, and a receiving unit that receives the low-power wake-up signal assumed by the control unit from a base station.
  • the disclosed technology makes it possible to specify the method of generating and transmitting LP-WUS in a wireless communication system.
  • 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention.
  • 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention.
  • 1 is a diagram for explaining a modulation method of LP-WUS in an embodiment of the present invention.
  • 1 is a diagram for explaining a modulation method of LP-WUS in an embodiment of the present invention.
  • 1 is a diagram for explaining interference in LP-WUS in an embodiment of the present invention.
  • 1 is a diagram for explaining a LP-WUS transmission method in an embodiment of the present invention.
  • FIG. 1 is a diagram for explaining a LP-WUS transmission method in an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to an embodiment of the present invention.
  • 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. 2 is a diagram showing an example of the configuration of a vehicle 2001 according to an embodiment of the present invention.
  • LTE Long Term Evolution
  • NR NR
  • SS Synchronization signal
  • PSS Primary SS
  • SSS Secondary SS
  • PBCH Physical broadcast channel
  • PRACH Physical random access channel
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • 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.
  • "configuring" radio parameters and the like may mean that a predetermined value is pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are set.
  • the base station 10 or the terminal 20 may pre-configure a fixed value defined in the 3GPP standard/specification, or if multiple usable values are defined, the base station 10 may notify the terminal 20 of the value that it sets, or the terminal 20 may notify the base station 10 of a usable value.
  • FIG. 1 is a diagram showing an example of the configuration 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, a PSS and an SSS.
  • the system information is, for example, transmitted by the PBCH and is also called broadcast information.
  • the synchronization signal and the system information may be called an SSB (SS/PBCH block). As shown in FIG.
  • the base station 10 transmits a control signal or data to the terminal 20 in the DL (Downlink) and receives a control signal or data from the terminal 20 in the UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. In addition, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. In addition, 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). Furthermore, 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 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
  • 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, 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.
  • M2M Machine-to-Machine
  • FIG. 2 is a diagram for explaining a wireless communication system in an embodiment of the present invention.
  • Figure 2 shows an example of the configuration of a wireless communication system when DC (Dual connectivity) is implemented.
  • base station 10A which is an MN (Master Node)
  • base station 10B which is an SN (Secondary Node).
  • 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.
  • FIG 3 is a diagram for explaining communication by LP-WUS and LP-WUR in an embodiment of the present invention.
  • 3GPP registered trademark
  • Rel-18 a power consumption reduction technology called "Low-Power Wake Up Signal and Receiver” is under discussion.
  • Low-Power Wake Up Signal is called LP-WUS or simply WUS
  • Low-Power Wake Up Receiver is called LP-WUR, WUR, or LR.
  • a state called Ultra-Deep Sleep is introduced by operating the LR, a simple circuit that operates with lower power consumption than the Main Radio (MR) used in normal communication, as an alternative.
  • MR Main Radio
  • FIG 3(b) it is being discussed that the LR will have a function that triggers the power ON of the MR when the LR receives at least an LP-WUS signal.
  • Figure 4 is a diagram for explaining communication by LP-WUS and LP-WUR in an embodiment of the present invention.
  • the details of the functions that the LR should have are currently under discussion, including what states, such as RRC IDLE and RRC CONNECTED, the functional expansion should be aimed at, whether functions other than monitoring the LP-WUS and waking up the MR are necessary, and which functions of the MR should be substituted by the LR in the Ultra-Deep Sleep state (for example, RRM in RRC IDLE state).
  • the LR receives the LP-WUS, activates the MR, and continues the subsequent monitoring process of the PO.
  • the RACH procedure such as transmitting a PRACH
  • the PDCCH monitoring operation may be continued as an operation for RRC CONNECTED.
  • MC Multi Carrier
  • ASK Amplitude Shift Keying
  • MC-FSK Frequency Shift Keying
  • MC-OOK On Off Keying
  • FIG. 5 is a diagram for explaining the modulation method of LP-WUS in an embodiment of the present invention.
  • the ASK and OOK modulation shown in FIG. 5 are promising candidates as modulation methods for LP-WUS because they allow the construction of simple demodulation circuits.
  • circuit configuration for MC-OOK will be an ASK circuit based on the CP (Cyclic Prefix)-OFDM (Orthogonal Frequency-Division Multiplexing) multi-carrier method.
  • FIG. 6 is a diagram for explaining the modulation method of LP-WUS in an embodiment of the present invention.
  • 3GPP is considering MC-FSK, which follows the circuit configuration of CP-OFDM.
  • information bit "0" may be associated with subcarrier #1 and information bit "1" may be associated with subcarrier #2, and the amplitude/phase of either subcarrier may be modulated according to the information bit.
  • consecutive subcarriers (#1 to #4, #5 to #8) may be modulated in amplitude/phase according to the information bit, or consecutive subcarriers may be used to transmit sequences such as Zadoff-Chu sequences, Gold sequences, and M sequences.
  • 3GPP is also studying methods of interference suppression, both within one's own cell and between cells. Because LP is premised on an extremely low power consumption receiver configuration, a simple configuration is also expected for LP-WUS, so there is a possibility that conventional technologies, such as inter-cell interference suppression using reference signals, may not be usable.
  • FIG. 7 is a diagram for explaining interference in LP-WUS in an embodiment of the present invention.
  • FIG. 7(a) when terminal 20 monitors LP-WUS continuously in time, it is necessary to be able to distinguish adjacent LP-WUS without interfering with each other.
  • FIG. 7(b) when LP-WUS transmissions of the own cell and adjacent cell are synchronized, it is necessary to be able to distinguish the LP-WUS of the own cell and adjacent cell without interfering with each other. If the LP-WUS is designed without taking such interference into consideration, there is a possibility that erroneous detection of the LP-WUS or deterioration of reception performance will occur in terminal 20.
  • FIG. 8 is a diagram for explaining a method of transmitting an LP-WUS in an embodiment of the present invention.
  • the base station 10 sets setting information including information on the range of resources that can be transmitted by the LP-WUS, and transmits the LP-WUS to the terminal 20 at a necessary timing within the set resource range based on the setting information.
  • the terminal 20 sets resources for receiving the LP-WUS based on setting information including information on the range of resources that can be transmitted by the LP-WUS received from the base station 10, and receives the LP-WUS transmitted from the base station 10.
  • the range of resources that can be transmitted by the LP-WUS may not be set by the base station to the terminal, but the terminal may request the base station to provide a range of resources that can be received, or a unique range or multiple candidates may be specified in the standard specifications.
  • the LP-WUS transmitted in FIG. 8 is, for example, a signal that instructs the MR to be woken up (powered on).
  • the LP-WUS may include information on a terminal identifier (UE_ID) indicating the terminal 20 to be designated, or a terminal group identifier (UE_group_ID) indicating a group of the terminals 20 to be designated, and the LP-WUS may specify multiple UE_IDs or multiple UE_group_IDs.
  • a LP-WUS multiplexed from a single LP-WUS may be generated and transmitted by using time division multiplexing (TDM), frequency division multiplexing (FDM), code division multiplexing (CDM), or the like.
  • FIG. 9 is a diagram for explaining a method of transmitting an LP-WUS in an embodiment of the present invention.
  • the base station 10 sets configuration information including information on opportunities when an LP-WUS can be transmitted (LP-WUS occasions), and transmits an LP-WUS to the terminal 20 at the required timing within the set resource range based on the configuration information.
  • LP-WUS occasions have a certain time period.
  • the terminal 20 sets resources for receiving an LP-WUS based on the configuration information received from the base station 10 including information on opportunities when an LP-WUS can be transmitted (LP-WUS occasions), and receives the LP-WUS transmitted from the base station 10.
  • LP-WUS occasions resource for receiving an LP-WUS based on the configuration information received from the base station 10 including information on opportunities when an LP-WUS can be transmitted (LP-WUS occasions).
  • LP-WUS which instructs the MR to be woken up (powered ON)
  • LP-WUS which instructs the MR not to be woken up (powered ON)
  • the base station 10 may transmit an LP-WUS (LP-WUS(ON) or LP-WUS(OFF)) at every opportunity when an LP-WUS can be transmitted, as shown in FIG. 9(a).
  • the base station 10 may transmit an LP-WUS only when necessary at an opportunity when an LP-WUS can be transmitted, as shown in FIG. 9(b).
  • the base station 10 transmits an LP-WUS(ON) indicated by the solid line rectangle, but does not transmit an LP-WUS(OFF) indicated by the dotted line rectangle.
  • FIG. 10 is a diagram for explaining the format of an LP-WUS in an embodiment of the present invention.
  • FIG. 10 shows five types of LP-WUS formats, each including a preamble and a payload. In this embodiment, one type of format may be used, or multiple types of formats may be used.
  • the preamble is a signal for the terminal 20 to detect the LP-WUS.
  • the payload includes, for example, information instructing the aforementioned MR to be woken up (to turn the power ON), information instructing the MR not to be woken up (to not turn the power ON), a terminal identifier (UE_ID) indicating the terminal 20 to be instructed, and information regarding a terminal group identifier (UE_group_ID) indicating the group of the terminal 20 to be instructed.
  • UE_ID terminal identifier
  • UE_group_ID terminal group identifier
  • the preamble and payload are transmitted when requested.
  • the request may be when the base station 10 requests wake-up of the MR, or when the LP-WUS is transmitted irregularly due to other triggers. The same applies hereafter.
  • the preamble is sent periodically and the payload is sent on request.
  • the third format involves a preamble that is sent periodically followed by another preamble and payload upon request.
  • the preamble, which is sent periodically, and the payload, which is sent upon request, are each sent as separate signals.
  • the preamble, which is a separate signal may be called LP-SS (Low Power - Synchronization Signal).
  • the preamble and payload are transmitted periodically.
  • Example 1 A first embodiment will be described.
  • five types of methods for generating and transmitting an LP-WUS may be assumed based on the following four types of information elements.
  • a method for generating and transmitting an LP-WUS based on information elements it becomes possible for the terminal 20 to receive the LP-WUS transmitted by the base station 10.
  • values related to information elements to be used in the operation of the terminal 20 to monitor and receive the LP-WUS are defined in advance.
  • the base station 10 and the terminal 20 may determine a method and parameters to be used in at least one of the five methods based on parameter values in at least one of the four types of information elements.
  • the first information element is a cell identifier (Cell ID) and/or a synchronization signal index (SSB Index).
  • the second information element is a terminal identifier (UE_ID) and/or a terminal group identifier (UE_group_ID), which is information indicating the terminal 20 that is the target of the instruction from the LP-WUS.
  • UE_ID terminal identifier
  • UE_group_ID terminal group identifier
  • the third information element is a parameter that determines the format of the LP-WUS.
  • the base station 10 notifies the terminal 20 of a parameter that specifies one format determined from the five types of formats shown in FIG. 10.
  • the fourth information element is the resource position (time and frequency resource position) in the time domain and frequency domain where the terminal 20 monitors the LP-WUS.
  • the resource position in the time domain is the SFN (System Frame Number, radio frame number) or symbol position.
  • the resource position in the frequency domain is the position or range in the frequency domain of the subcarrier used for transmission.
  • the fourth information element may also be the resource position of the LP-WUS, or, for example, when multiple LP-WUS placement locations are defined, information indicating which of these candidates the candidate is.
  • the first method is a method of generating an LP-WUS series.
  • the first method is a method of generating a signal series to be transmitted as part or all of an LP-WUS, or as an LP-SS, or the values of parameters related to series generation.
  • the series is also called a sequence.
  • the second method is a method related to channel coding, rate matching, and scrambling.
  • the second method is a method or parameter value used when performing channel coding, rate matching, and scrambling.
  • channel coding is also called communication path coding or error correction coding.
  • the third method is a modulation method.
  • the third method is a modulation method such as ASK, FSK, and OOK shown in Figures 5 and 6, and a processing method related to information bits or information sequences (mapping of subcarrier positions, modulation level, etc.).
  • the fourth method is the LP-WUS format.
  • the fourth method is the five types of formats shown in Figure 10.
  • the fifth method is the resource position (time and frequency resource position) in the time domain and frequency domain where the terminal 20 monitors the LP-WUS.
  • the resource position in the time domain is the SFN (System Frame Number, radio frame number) or symbol position.
  • the resource position in the frequency domain is the position or range in the frequency domain of the subcarrier used for transmission.
  • the fifth method may also be the resource position of the LP-WUS, or, for example, when multiple LP-WUS placement locations are defined, information indicating which of these candidates the candidate is.
  • the base station 10 may determine the resource position for the fifth method by transmitting configuration information (such as RRC configuration) or control information (such as downlink channel control information, DCI) including a setting value for the fourth information element to the terminal 20, and further, the terminal 20 may change the resource position based on the first information element and the second information element, or may select a part of the resource position determined by the base station 10.
  • configuration information such as RRC configuration
  • control information such as downlink channel control information, DCI
  • the base station 10 and the terminal 20 may assume a first method of generating an LP-WUS sequence based on the cell ID, which is the first information element.
  • they may assume any sequence generation method, such as a Zadoff-Chu sequence, a Gold sequence, or an M sequence, and generate a sequence by providing a parameter based on the cell ID, or they may select a sequence to be used for transmission from a plurality of generated sequence candidates based on the cell ID.
  • the base station 10 and the terminal 20 can generate a different LP-WUS sequence for each cell ID by assuming a method of generating an LP-WUS sequence based on the cell ID.
  • the base station 10 and the terminal 20 can use the absolute or relative time/frequency position of the LP-WUS as a parameter based on the fourth information element to generate a different LP-WUS sequence generation method for each parameter value.
  • the parameter may be, for example, a frame number, a symbol number, a frequency band, a subcarrier position, etc.
  • Example 1-1 (Example 1-1) Example 1-1 will be described.
  • a multi-stage detection process may be assumed in the generation and transmission of an LP-WUS. That is, the remainder (series) of the LP-WUS may be generated based on information explicitly or implicitly notified in a part (series) of the LP-WUS.
  • the LP-WUS may be in any of the first to fifth formats shown in FIG. 10.
  • the terminal 20 may obtain information on the first to fourth information elements and the first to fifth methods by blind detection.
  • blind detection for example, when the decoding method or parameters used in the decoding are not notified, a decoding process is executed using multiple decoding methods and parameters, and the decoded value when the decoding is successful is set as the detection value.
  • the terminal 20 may acquire a first information element by blindly detecting a portion of the LP-WUS, and may use the acquired first information element to acquire information related to the first to fifth methods.
  • the terminal 20 acquires a finite number of cell IDs from the received LP-WUS preamble by blind detection. Furthermore, the terminal 20 uses the acquired cell IDs to decode the LP-WUS payload that is scrambled based on the cell ID (second method).
  • Example 1-2 will be described.
  • the first to fourth information elements may be notified in advance from the base station 10 to the terminal 20 as LP-WUS config.
  • the base station 10 may transmit setting information regarding the LP-WUS including the first to fourth information elements to the terminal 20 by higher layer signaling such as RRC, MIB, SIB, or the like.
  • the base station 10 may transmit control information regarding the LP-WUS including the first to fourth information elements to the terminal 20 by DCI or MAC CE (Control Element), etc., in the control channel (PDCCH) or data channel (PDSCH).
  • DCI Control Element
  • MAC CE Control Element
  • the terminal 20 may obtain the SSB index, which is all or part of the first to fourth information elements, from the base station 10 via the MIB, SSB (SS/PBCH block), or a combination of MIB and SSB.
  • the base station 10 does not need to transmit all of the information of the first to fourth information elements to the terminal 20 as LP-WUS config, and may transmit all or part of the information of the first to fourth information elements to the terminal 20 by combining RRC, MIB, SIB, DCI, MAC CE, etc.
  • Example 1-3 in the LP-WUS measurement of the neighboring cell, the base station 10 may notify the terminal 20 of a list of values of the neighboring cells regarding the first to fourth information elements as assist information.
  • the above-described embodiment allows the method of generating and transmitting LP-WUS to be specified in a wireless communication system.
  • the method of generating and transmitting LP-WUS can be designed to prevent mutual interference between LP-WUS and interference between LP-WUS and existing NR signals.
  • the name LP-WUS may be, for example, a low power wake-up signal.
  • the base station 10 may also be called a network (Network, NW).
  • the base station 10 and the terminal 20 include functions for implementing the above-mentioned embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions in the embodiments.
  • Fig. 11 is a diagram showing an example of a functional configuration of a base station 10 in an embodiment of the present invention.
  • 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. 11 is merely an example.
  • the names of the functional divisions and functional units may be any as long as they can execute the operations related to the embodiment of the present invention.
  • the transmitting unit 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly.
  • the transmitting unit 110 also transmits setting information, instructions, and notifications related to paging notification information and low power wake-up signals to the terminal 20.
  • the transmitting unit 110 also transmits notifications related to switching of monitoring operations to the terminal.
  • the receiving unit 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of higher layers from the received signals.
  • the transmitting unit 110 also has a function of transmitting PSS, SSS, PBCH, DL/UL control signals, and the like to the terminal 20.
  • the receiving unit 120 also receives inter-network node messages from other network nodes.
  • the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20.
  • the contents of the setting information include, for example, information related to settings related to paging notification information and low power wake-up signals.
  • the control unit 140 controls the setting, instruction, and notification of the low power wakeup signal.
  • the functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.
  • Fig. 12 is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention.
  • 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. 12 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 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 transmitter 210 also transmits capability information related to the transmission and reception of the ultra-low power wake-up signal to the base station 10.
  • the receiver 220 wirelessly receives various signals and acquires higher layer signals from the received physical layer signals.
  • the receiver 220 also has a function of receiving PSS, SSS, PBCH, DL/UL/SL control signals, etc. transmitted from the base station 10.
  • the receiver 220 also receives paging notification information and setting information, instructions, notifications, etc. related to the low power wake-up signal from the base station 10.
  • the receiver 220 receives an ultra-low power wake-up signal from the base station 10.
  • the setting unit 230 stores various setting information received from the base station 10 by the receiver 220.
  • the setting unit 230 also stores setting information that is set in advance.
  • the content of the setting information is, for example, information related to the setting of the low power wake-up signal.
  • the control unit 240 performs settings related to the ultra-low power wake-up signal as described in the embodiment.
  • the functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.
  • 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.).
  • the functional block 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, selection, establishment, comparison, assumption, expectation, regarding, 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. 13 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. 11 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. 12 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 outputs 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.
  • FIG. 14 shows an example configuration of a 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.
  • a communication device mounted on the vehicle 2001 may be applied to the communication module 2013, for example.
  • 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 or rear wheel rotation speed signal acquired by a rotation speed sensor 2022, a front or rear wheel air pressure signal acquired by an air pressure sensor 2023, a vehicle speed signal acquired by a vehicle speed sensor 2024, an acceleration signal acquired by an acceleration sensor 2025, an accelerator pedal depression amount signal acquired by an accelerator pedal sensor 2029, a brake pedal depression amount signal acquired by a brake pedal sensor 2026, a shift lever operation signal acquired by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired 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 an 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 in 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.
  • a receiving unit that receives the low power wakeup signal assumed by the control unit from a base station; A terminal having the above configuration.
  • the control unit generates the remainder of the low power wakeup signal based on information obtained from the portion of the low power wakeup signal.
  • the receiving unit receives configuration information including at least one of the first information element, the second information element, the third information element, and the fourth information element from the base station.
  • the terminal of claim 1 further comprising: receiving, from the base station, assist information including a list of values of the neighboring cells for at least one of the first information element, the second information element, the third information element, and the fourth information element, in measurements regarding the low power wake-up signals of the neighboring cells.
  • a transmitter that transmits the low power wakeup signal assumed by the controller to a terminal A base station having (Section 6) A first information element indicating a cell identifier or a synchronization signal index; A second information element indicating a terminal identifier or a terminal group identifier; A third information element indicating a format of the low power wakeup signal; and based on at least one of a fourth information element indicating a location of a time and frequency resource to be monitored for the low power wakeup signal, Regarding the method for generating or transmitting the low power wake-up signal, A first method for generating a signal sequence; A second method for channel coding, rate matching, or scrambling; A third method for modulation method; A fourth method of formatting: and a control step of predicting the low power wakeup signal using at least one of a fifth method and a fifth method indicating a location of a time and frequency resource to be monitored for the low power wakeup signal.
  • any of the above configurations can specify the method of generating and transmitting LP-WUS in a wireless communication system.
  • the method of generating and transmitting LP-WUS can be designed to prevent mutual interference between LP-WUS and interference between LP-WUS and existing NR signals.
  • 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 the 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 applied to at least one of systems utilizing LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-Wide Band), Bluetooth (registered trademark), or other suitable systems, and next generation systems enhanced based on these. Additionally, multiple systems may be combined (for example, a combination of at least one of LTE and LTE-A with 5G, etc.).
  • 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, 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 parameters described above are not intended to be limiting in any way. 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 intended to be limiting in any way.
  • base station BS
  • wireless base station base station
  • base station device fixed station
  • NodeB nodeB
  • eNodeB 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.
  • 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 user terminal.
  • each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user 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 terminal-to-terminal communication (for example, "side").
  • the uplink channel, downlink channel, etc. may be read as a side channel.
  • 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)
  • TTI Transmission Time Interval
  • multiple consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI.
  • at least one of 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.
  • 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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