WO2022091557A1 - 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
WO2022091557A1
WO2022091557A1 PCT/JP2021/031552 JP2021031552W WO2022091557A1 WO 2022091557 A1 WO2022091557 A1 WO 2022091557A1 JP 2021031552 W JP2021031552 W JP 2021031552W WO 2022091557 A1 WO2022091557 A1 WO 2022091557A1
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WIPO (PCT)
Prior art keywords
cell
terminal
base station
condition
initial access
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PCT/JP2021/031552
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English (en)
Japanese (ja)
Inventor
悠貴 外園
翔平 吉岡
慎也 熊谷
祥久 岸山
聡 永田
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株式会社Ｎｔｔドコモ
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Publication of WO2022091557A1 publication Critical patent/WO2022091557A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Definitions

  • the present invention relates to a terminal, a base station and a communication method in a wireless communication system.
  • Non-Patent Document 1 In NR (New Radio) (also referred to as “5G”), which is the successor system to LTE (Long Term Evolution), the requirements are a large capacity system, high-speed data transmission speed, low delay, and simultaneous use of many terminals. Techniques that satisfy connection, low cost, power saving, etc. are being studied (for example, Non-Patent Document 1).
  • NTN Non-Terrestrial Network
  • the distance between the base station in the sky and the terminal is very large, so the transmission timing for each terminal can differ significantly. For example, it has been difficult to set an appropriate uplink transmission timing for each of the terminal having the shortest distance to the base station and the terminal having the longest distance to the base station.
  • the present invention has been made in view of the above points, and an object of the present invention is to appropriately set the timing of uplink transmission in a wireless communication system.
  • a control unit that determines whether or not a cell targeted for initial access satisfies the condition, and if the cell satisfies the condition, an uplink transmission timing different from that of a cell that does not satisfy the condition is determined.
  • a terminal having a communication unit that executes initial access in a cell satisfying the above conditions is provided.
  • the timing of uplink transmission can be appropriately set in the wireless communication system.
  • the existing technique is appropriately used in the operation of the wireless communication system according to the embodiment of the present invention.
  • the existing technique is, for example, an existing LTE, but is not limited to the existing LTE.
  • LTE used in the present specification has a broad meaning including LTE-Advanced and LTE-Advanced and later methods (eg, NR) unless otherwise specified.
  • SS Synchronization signal
  • PSS Primary SS
  • SSS Secondary SS
  • PBCH Physical broadcast channel
  • PRACH Physical
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • NR corresponds to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, NR-PDCCH, NR-PDSCH, NR-PUCCH, NR-PUSCH and the like.
  • NR- even if it is a signal used for NR, it is not always specified as "NR-".
  • the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or any other system (for example, Flexible Duplex, etc.). Method may be used.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • Method may be used.
  • "configuring" the radio parameter or the like may mean that a predetermined value is set in advance (Pre-configure), or the base station 10 or The radio parameter notified from the terminal 20 may be set.
  • FIG. 1 is a diagram showing an example (1) of NTN.
  • NTN Non-Terrestrial Network
  • NTN can provide more reliable services. For example, it is expected to be applied to IoT (Inter of things), ships, buses, trains, and critical communications.
  • IoT Inter of things
  • NTN also has efficient multicast or broadcast scalability.
  • the satellite 10A retransmits the signal transmitted from the ground base station 10B to provide a service to an area where the ground base station is not located, for example, a mountainous area. Can be done.
  • the terrestrial 5G network may have the configuration described below.
  • the terrestrial 5G network includes one or more base stations 10 and terminals 20.
  • 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 the radio signal are defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM 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. Synchronous signals are, for example, NR-PSS and NR-SSS.
  • the system information is transmitted by, for example, NR-PBCH, and is also referred to as broadcast information.
  • the base station 10 transmits a control signal or data to the terminal 20 by DL (Downlink), and receives the control signal or data from the terminal 20 by UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. Further, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. Further, both the base station 10 and the terminal 20 may communicate via SCell (Secondary Cell) and PCell (Primary Cell) by CA (Carrier Aggregation).
  • SCell Secondary Cell
  • PCell Primary Cell
  • the terminal 20 is a communication device having a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, and a communication module for M2M (Machine-to-Machine).
  • the terminal 20 uses various communication services provided by the wireless communication system by receiving the control signal or data from the base station 10 on the DL and transmitting the control signal or data to the base station 10 on the UL.
  • FIG. 2 is a diagram showing an example (1) of timing advance.
  • the UL transmission timing is determined based on the timing advance (Timing Advance, TA) and the parameters K1 and K2 which are UL slot instructions.
  • TA Timing Advance
  • FIG. 3 is a diagram showing an example (2) of timing advance.
  • NTN since the distance from the base station in the sky to the terminal is very large, the timing of UL transmission cannot be correctly instructed to the terminal 20 only by the timing advance and the UL slot instruction (parameters K1 and K2).
  • the transmission timing is advanced by timing advance.
  • the timing advance becomes very large, there is a contradiction that the transmission timing becomes a time before the reception timing of the PDCCH.
  • an offset K offset may be defined, and a UL slot instruction may be given by K1 + K offset or K2 + K offset .
  • K1 may be applied to the offset from PDSCH to PUCCH
  • K2 may be applied to the offset from PDCCH to PUSCH.
  • the Koffset may be cell-specific or beam-specific, at least at the initial access stage. Further, the Koffset does not have to be unique to the UE.
  • 1, 2, ..., 8 can be specified for K1
  • j, j + 1, j + 2, j + 3 can be specified for K2
  • the TA command is 12 bits and ms. It can be specified by the particle size.
  • FIG. 4 is a diagram showing an example (2) of NTN.
  • the area per cell or beam in NTN is very large compared to the terrestrial network.
  • FIG. 4 shows an example of NTN configured by satellite retransmission.
  • the connection between the satellite 10A and the NTN gateway 10B is called a feeder link, and the connection between the satellite 10A and the UE 20 is called a service link.
  • the difference in delay between the UE 20A at the near end (near side) and the UE 20B at the far end (far side) is 10.3 ms, for example, in the case of GEO (Geosynchronous orbit).
  • LEO Low Earth orbit
  • the beam size in NTN is, for example, 3500 km in the case of GEO and 1000 km in the case of LEO.
  • the transmission timing of each terminal 20 may differ greatly in the same cell or the same beam.
  • the Koffset is common among the terminals 20, and the TA command in the initial access (RAR, Random access response) and the K1 / K2 value that can be specified in the DCI (Downlink Control Information) format 1_0 / 0_0. Then, there is a possibility that all terminals 20 cannot specify the UL transmission timing that can be supported.
  • FIG. 5 is a diagram showing an example of UL transmission timing.
  • the Koffset set at the time of initial access is set to a value such that the transmission timing of the corresponding PUCCH / PUSCH does not precede the reception timing of the PDCCH in the terminal 20 (for example, UE 20B) having the largest propagation delay in the cell or beam. Is expected to be done.
  • FIG. 5 shows an example of the range of Koffset and K2 that enables UL to be transmitted to the UE 20B immediately after the DL reception timing.
  • the PDCCH reception is performed, for example, as shown by the portion surrounded by the broken line shown in FIG.
  • the interval between PUCCH / PUSCH transmission becomes unnecessarily large. Therefore, from the viewpoint of the base station 10, the flexibility of scheduling is impaired.
  • the number of HARQ Hybrid automatic repeat request
  • the packet delay becomes unnecessarily large.
  • the instruction method from the base station 10 for determining the transmission timing of the PUSCH or PUCCH in the cell satisfying the predetermined condition may be different from the instruction method in the cell not satisfying the predetermined condition.
  • the instruction method will be described below.
  • FIG. 6 is a diagram showing an example of UL transmission timing in the embodiment of the present invention.
  • a negative value may be set in the candidate value of the offset K1 or K2 of the slot.
  • the extended K2 range in which a negative value can be set may be applied to the UE 20A located at the near end.
  • the range of K1 may be similarly expanded so that a negative value can be set.
  • a plurality of candidate values of K1 or K2 may be set to be cell-specific or UE-specific by RRC (Radio Resource Control) signaling or MAC-CE (Media Access Control-Control Element). From the plurality of set candidate values, one or a plurality of K1 / K2 may be designated by DCI format 0_1 / 1-1, may be designated by DCI format 0_1 / 1-2, and PUSCH / other than DCI format 0_1 / 1_0. It may be indicated by the DCI format for PDSCH scheduling.
  • RRC Radio Resource Control
  • MAC-CE Media Access Control-Control Element
  • One or more K1 / K2 from a plurality of set candidate values may be notified in the DCI format for notifying Koffset, and CRC (Cyclic Redundancy Check) is scrambled by a specific RNTI (Radio Network Temporary Identifier). It may be notified in the DCI format.
  • CRC Cyclic Redundancy Check
  • the candidate values of K1 / K2 may be set in association with any of the following parameters.
  • a negative value in the same range as a positive value may be defined as a value that can be set for K1 / K2.
  • an integer may be set from -15 to 15, or an integer may be set from ⁇ 32 to 32.
  • the value that can be set in K1 / K2 may be larger in the number of negative value candidates than in the number of positive value candidates, may be wider in range, and is determined based on a predetermined parameter x. May be done.
  • an integer may be set from -32 to 15, an integer may be set from -64 to 32, and an integer may be set from x to 32. ..
  • the predetermined parameter x may be determined based on Koffset or may be set separately from Koffset.
  • an instruction to replace the offset K1 or K2 of the slot with a negative value may be given.
  • the instruction to replace K1 / K2 with a negative value may be instructed in DCI format 0_1 / 1-1, DCI format 0_1 / 1-2, and DCI for PUSCH / PDSCH scheduling other than DCI format 0_1 / 1_0. It may be instructed by the format.
  • the instruction to replace K1 / K2 with a negative value may be notified in the DCI format notifying Koffset, or may be instructed in the DCI format in which the CRC is scrambled in a specific RNTI.
  • the above DCI format may have one bit that replaces K1 / K2 with a negative value.
  • RNTI scrambling the CRC in DCI format may instruct K1 / K2 to be read as a negative value.
  • the terminal 20 may operate with the slot offset K1 / K2 as a negative value when instructed to read K1 / K2 as a negative value. For example, when the value of K1 specified in the DCI format is 2, and an instruction is given to read K1 / K2 as a negative value, the value of K1 is read as -2 and the slot in which PUCCH is scheduled is used. Identify. That is, Koffset-2 is an offset from PDSCH to PUCCH.
  • a common Koffset may be used for each cell.
  • the Koffset set for each user may be specified in the DCI format for PUSCH / PDSCH scheduling other than the DCI format 0_0 / 1_0.
  • the Koffset common to each cell may be the Koffset received at the time of initial access, or may be the Koffset received by MIB / SIB1 / or other SIB.
  • FIG. 7 is a flowchart for explaining the initial access in the embodiment of the present invention.
  • the terminal 20 determines whether or not the cell satisfies a predetermined condition. If the cell satisfies a predetermined condition (YES in S1), the process proceeds to step S2, and if the cell does not satisfy the predetermined condition (NO in S1), the process proceeds to step S3.
  • the terminal 20 assumes an instruction of UL transmission timing for a cell satisfying a predetermined condition.
  • step S3 the terminal 20 assumes an instruction of UL transmission timing for a cell that does not satisfy a predetermined condition.
  • the terminal 20 executes the initial access at the designated UL transmission timing.
  • the cell in step S1 may be a cell that is the target of initial access, or may be a cell that is the target of normal access.
  • the cell satisfying the predetermined condition in step S1 may be, for example, the cell shown in 1) -3) below.
  • a cell indicating that it is NTN 2) A cell to which a predetermined parameter (for example, Koffset ) is given 3) A cell in the sky or formed by a non-terrestrial base station 10.
  • a predetermined parameter for example, Koffset
  • the cell that does not satisfy the predetermined condition in step S1 may be, for example, a cell provided by the ground-based base station 10.
  • the UL transmission timing instruction for a cell satisfying a predetermined condition in step S2 may be an instruction executed by the above instruction method.
  • the timing of uplink transmission can be appropriately set.
  • the base station 10 and the terminal 20 include a function for carrying out the above-described embodiment.
  • the base station 10 and the terminal 20 may each have only a part of the functions in the embodiment.
  • FIG. 8 is a diagram showing an example of the functional configuration of the base station 10 according to the embodiment of the present invention.
  • the base station 10 has a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140.
  • the functional configuration shown in FIG. 8 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be performed.
  • the transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. Further, the transmission unit 110 transmits a message between network nodes to another network node.
  • the receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring information of, for example, a higher layer from the received signals. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals and the like to the terminal 20. Further, the receiving unit 120 receives a message between network nodes from another network node.
  • the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20.
  • the content of the setting information is, for example, information related to communication in NTN.
  • control unit 140 controls communication related to NTN. Further, the control unit 140 controls communication with the terminal 20 based on the UE capability report regarding the radio parameter received from the terminal 20.
  • the function unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the function unit related to signal reception in the control unit 140 may be included in the reception unit 120.
  • FIG. 9 is a diagram showing an example of the functional configuration of the terminal 20 according to the embodiment of the present invention.
  • the terminal 20 has a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240.
  • the functional configuration shown in FIG. 9 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be performed.
  • the transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
  • the receiving unit 220 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer. Further, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals and the like transmitted from the base station 10. Further, for example, the transmission unit 210 may use PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel) as D2D communication on another terminal 20. Etc. are transmitted, and the receiving unit 120 receives PSCCH, PSSCH, PSDCH, PSBCH, etc. from the other terminal 20.
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSDCH Physical Sidelink Discovery Channel
  • PSBCH Physical Sidelink Broadcast Channel
  • the setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220.
  • the setting unit 230 also stores preset setting information.
  • the content of the setting information is, for example, information related to communication in NTN.
  • the control unit 240 controls communication in NTN as described in the embodiment.
  • the function unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the function unit related to signal reception in the control unit 240 may be included in the reception unit 220.
  • each functional block may be realized using one physically or logically coupled device, or two or more physically or logically separated devices can be directly or indirectly (eg, for example). , Wired, wireless, etc.) and may be realized using these plurality of devices.
  • the functional block may be realized by combining the software with the one device or the plurality of devices.
  • Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but limited to these I can't.
  • a functional block (configuration unit) that makes transmission function is called a transmitting unit (transmitting unit) or a transmitter (transmitter).
  • the realization method is not particularly limited.
  • the base station 10, the terminal 20, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
  • FIG. 10 is a diagram showing an example of the hardware configuration of the base station 10 and the terminal 20 according to the embodiment of the present disclosure.
  • the above-mentioned base station 10 and terminal 20 are 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, and the like. May be good.
  • the word “device” can be read 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 not to include some of the devices.
  • the processor 1001 For each function in the base station 10 and the terminal 20, by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, the processor 1001 performs an calculation and controls the communication by the communication device 1004. It is realized by controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
  • the processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.
  • CPU Central Processing Unit
  • control unit 140, control unit 240, and the like may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these.
  • a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
  • the control unit 140 of the base station 10 shown in FIG. 8 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
  • the control unit 240 of the terminal 20 shown in FIG. 9 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
  • Processor 1001 may be mounted by one or more chips.
  • the program may be transmitted from the network via a telecommunication line.
  • the storage device 1002 is a computer-readable recording medium, and is, for example, by at least one of ROM (ReadOnlyMemory), EPROM (ErasableProgrammableROM), EEPROM (ElectricallyErasableProgrammableROM), RAM (RandomAccessMemory), and the like. It may be configured.
  • the storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu).
  • -It may be composed of at least one of a ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like.
  • the storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 1003.
  • the communication device 1004 is hardware (transmission / reception 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, or the like.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission / reception unit may be physically or logically separated from each other in the transmission unit and the reception unit.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the storage device 1002 is connected by the bus 1007 for communicating information.
  • the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
  • the base station 10 and the terminal 20 are hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include, and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the control unit for determining whether or not the cell targeted for initial access satisfies the condition, and the condition when the cell satisfies the condition.
  • a terminal having a communication unit that executes initial access in a cell satisfying the above conditions by applying an uplink transmission timing different from that of a cell that does not satisfy the condition is provided.
  • slot notification for UL transmission suitable for each terminal becomes possible in the initial access. That is, in the wireless communication system, the timing of uplink transmission can be appropriately set.
  • the condition may be that the cell targeted for the initial access is NTN (Non-Terrestrial Network).
  • NTN Non-Terrestrial Network
  • the uplink transmission timing may be specified by the total of the fixed offset and the variable offset corresponding to the downlink transmission to the uplink reception on the base station side.
  • the terminal 20 can perform slot notification for UL transmission suitable for each terminal when the cell is NTN in the initial access.
  • the variable offset may be set to a positive value and a negative value.
  • control unit that determines whether or not the cell targeted for initial access satisfies the condition is different from the cell that does not satisfy the condition when the cell satisfies the condition.
  • a base station having a communication unit that executes initial access in a cell satisfying the above conditions by applying the uplink transmission timing is provided.
  • slot notification for UL transmission suitable for each terminal becomes possible in the initial access. That is, in the wireless communication system, the timing of uplink transmission can be appropriately set.
  • control procedure for determining whether or not the cell targeted for initial access satisfies the condition is different from the cell that does not satisfy the condition when the cell satisfies the condition.
  • a communication method in which a terminal executes a communication procedure for executing initial access in a cell satisfying the above conditions by applying an uplink transmission timing.
  • slot notification for UL transmission suitable for each terminal becomes possible in the initial access. That is, in the wireless communication system, the timing of uplink transmission can be appropriately set.
  • the operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components.
  • the processing order may be changed as long as there is no contradiction.
  • the base station 10 and the terminal 20 have been described with reference to functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof.
  • the software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only memory, respectively. It may be stored in (ROM), EPROM, EPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. It may be carried out by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.
  • RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
  • Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 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)) )), LTE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize appropriate systems and have been extended based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
  • the specific operation performed by the base station 10 in the present specification may be performed by its upper node (upper node).
  • various operations performed for communication with the terminal 20 are performed by the base station 10 and other network nodes other than the base station 10 (for example, MME, S-GW, etc. are conceivable, but it is clear that it can be done by at least one of these).
  • MME, S-GW, etc. are conceivable, but it is clear that it can be done by at least one of these.
  • the case where there is one network node other than the base station 10 is illustrated, but the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). ..
  • the information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
  • the input / output information and the like may be stored in a specific location (for example, a memory) or may be managed using a management table. Information to be input / output may be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.
  • the determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparison of numerical values (for example). , Comparison with a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
  • Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.).
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.
  • wireless technology infrared, microwave, etc.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
  • a channel and a symbol may be a signal (signaling).
  • the signal may be a message.
  • the component carrier CC: Component Carrier
  • CC Component Carrier
  • system and “network” used in this disclosure are used interchangeably.
  • the information, parameters, etc. described in the present disclosure may be expressed using an absolute value, a relative value from a predetermined value, or another corresponding information. It may be represented.
  • the radio resource may be one indicated by an index.
  • base station Base Station
  • wireless base station base station
  • base station device fixed station
  • NodeB nodeB
  • eNodeB eNodeB
  • GNB nodeB
  • access point “ transmission point ”,“ reception point ”,“ transmission / reception point ”,“ cell ”,“ sector ”
  • Terms such as “cell group,” “carrier,” and “component carrier” may be used interchangeably.
  • Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
  • the base station can accommodate one or more (eg, 3) cells. When a base station accommodates multiple cells, the entire base station coverage area can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)). Communication services can also be provided by (Remote Radio Head).
  • the term "cell” or “sector” is a part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage. Point to.
  • MS Mobile Station
  • UE User Equipment
  • Mobile stations can be used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
  • At least one of the base station and the mobile station may be a device mounted on the mobile body, a mobile body itself, or the like.
  • the moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be.
  • at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
  • at least one of a base station and a 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 by the user terminal.
  • the communication between the base station and the user terminal is replaced with the communication between a plurality of terminals 20 (for example, it may be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • Each aspect / embodiment of the present disclosure may be applied to the configuration.
  • the terminal 20 may have the functions of the base station 10 described above.
  • words such as "up” and “down” may be read as words corresponding to communication between terminals (for example, "side”).
  • the upstream channel, the downstream channel, and the like may be read as a side channel.
  • the user terminal in the present disclosure may be read as a base station.
  • the base station may have the functions of the above-mentioned user terminal.
  • determining and “determining” used in this disclosure may include a wide variety of actions.
  • “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). It may include (eg, searching in a table, database or another data structure), ascertaining as “judgment” or “decision”.
  • judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. It may include (for example, accessing data in memory) to be regarded as “judgment” or “decision”.
  • judgment and “decision” are considered to be “judgment” and “decision” when the things such as solving, selecting, choosing, establishing, and comparing are regarded as “judgment” and “decision”. Can include. That is, “judgment” and “decision” may include considering some action as “judgment” and “decision”. Further, “judgment (decision)” may be read as “assuming", “expecting”, “considering” and the like.
  • connection means any direct or indirect connection or connection between two or more elements and each other. It can include the presence of one or more intermediate elements between two “connected” or “combined” elements.
  • the connection or connection between the elements may be physical, logical, or a combination thereof.
  • connection may be read as "access”.
  • the two elements use at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be “connected” or “coupled” to each other using electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions.
  • the reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) depending on the applied standard.
  • RS Reference Signal
  • Pilot Pilot
  • references to elements using designations such as “first” and “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Therefore, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.
  • each of the above devices may be replaced with a "part”, a “circuit”, a “device”, or the like.
  • the wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe.
  • the subframe may further be composed of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
  • the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
  • Numerology includes, for example, subcarrier interval (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, wireless frame configuration, transmitter / receiver. It may indicate at least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like.
  • the slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time region. Slots may be time units based on numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may include a plurality of mini slots. Each minislot may be composed of one or more symbols in the time domain. Further, the mini slot may be referred to as a sub slot. The minislot may consist of a smaller number of symbols than the slot.
  • a PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as a PDSCH (or PUSCH) mapping type A.
  • the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
  • the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
  • the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
  • one subframe may be called a transmission time interval (TTI), a plurality of consecutive subframes may be called TTI, and one slot or one minislot may be called TTI.
  • TTI transmission time interval
  • You may. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. May be.
  • the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • the base station schedules each terminal 20 to allocate radio resources (frequency bandwidth that can be used in each terminal 20, transmission power, etc.) in TTI units.
  • the definition of TTI is not limited to this.
  • TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
  • the time interval for example, the number of symbols
  • the transport block, code block, code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
  • TTI shorter than normal TTI may be referred to as shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, minislot, subslot, slot and the like.
  • the long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms
  • the short TTI eg, shortened TTI, etc.
  • TTI having the above TTI length may be read as TTI having the above TTI length.
  • the resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
  • the number of subcarriers contained in the RB may be determined based on numerology.
  • the time domain of the RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI.
  • Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
  • One or more RBs include a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.
  • PRB Physical resource block
  • SCG Sub-Carrier Group
  • REG Resource Element Group
  • PRB pair an RB pair, and the like. May be called.
  • the resource block may be composed of one or a plurality of resource elements (RE: Resource Element).
  • RE Resource Element
  • 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
  • the bandwidth part (which may also be called partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a certain neurology in a carrier.
  • RBs common resource blocks
  • PRBs may be defined in a BWP and numbered within that 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 set in one carrier for the UE.
  • At least one of the configured BWPs may be active and the UE may not expect to send or receive a given signal / channel outside the active BWP.
  • “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
  • the above-mentioned structures such as wireless frames, subframes, slots, mini-slots and symbols are merely examples.
  • the number of subframes contained in a radio frame the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
  • the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP: Cyclic Prefix) length, and other configurations can be changed in various ways.
  • the term "A and B are different” may mean “A and B are different from each other”.
  • the term may mean that "A and B are different from C”.
  • Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
  • the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.
  • the transmitting unit 210 and the receiving unit 220 are examples of the communication unit.
  • the transmission unit 110 and the reception unit 120 are examples of communication units.
  • Koffset is an example of a fixed offset.
  • K1 / K2 is an example of variable offset.
  • Base station 110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 20 Terminal 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention comprend : une unité de commande qui détermine si une cellule dans laquelle un accès initial doit être effectué satisfait une condition ; et une unité de communication qui, dans un cas où la cellule satisfaisant la condition, applique un instant de transmission de liaison montante différent de celui dans des cellules qui ne satisfont pas la condition et exécute l'accès initial dans la cellule qui satisfait la condition.
PCT/JP2021/031552 2020-10-29 2021-08-27 Terminal, station de base et procédé de communication WO2022091557A1 (fr)

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WO2023242929A1 (fr) * 2022-06-13 2023-12-21 株式会社Ｎｔｔドコモ Terminal, station de base, système de communication radio et procédé de communication radio

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