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WO2021070396A1 - Terminal et procédé de communication - Google Patents

Terminal et procédé de communication Download PDF

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Publication number
WO2021070396A1
WO2021070396A1 PCT/JP2019/040340 JP2019040340W WO2021070396A1 WO 2021070396 A1 WO2021070396 A1 WO 2021070396A1 JP 2019040340 W JP2019040340 W JP 2019040340W WO 2021070396 A1 WO2021070396 A1 WO 2021070396A1
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WO
WIPO (PCT)
Prior art keywords
slot
time domain
random access
physical
base station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/040340
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English (en)
Japanese (ja)
Inventor
知也 小原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
Original Assignee
NTT Docomo Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to CN201980101085.3A priority Critical patent/CN114503727B/zh
Priority to PCT/JP2019/040340 priority patent/WO2021070396A1/fr
Publication of WO2021070396A1 publication Critical patent/WO2021070396A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to a terminal and a communication method in a wireless communication system.
  • Non-Patent Document 1 NR (New Radio) (also called “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 operation of many terminals. Techniques that satisfy connection, low cost, power saving, etc. are being studied (for example, Non-Patent Document 1).
  • Random access is executed for synchronization establishment or scheduling request between terminals and base stations.
  • CBRA Contention-based random access
  • CFRA Contention-free random access
  • the terminal and the base station need to determine the position of the time domain in which the PUSCH (Physical Uplink Shared Channel) for transmitting the data portion excluding the random access preamble of MsgA is arranged.
  • the PUSCH Physical Uplink Shared Channel
  • the parameter indicating the position of the time domain becomes redundant.
  • the present invention has been made in view of the above points, and an object of the present invention is to efficiently notify the position of a resource related to a random access procedure in a wireless communication system.
  • the base station provides information indicating the position in the time domain of the physical random access channel for transmitting the message used in the two-step random access procedure and the time offset from the position in the time domain of the physical random access channel. Based on the length of the time domain used for the uplink from the receiver receiving from and the position in the time domain of the physical random access channel indicated by the time offset to the position in the time domain of the physical uplink shared channel.
  • the message is sent to the base station at a control unit that specifies a position of the physical uplink shared channel in the time domain, a position of the physical random access channel in the time domain, and a position of the physical uplink shared channel in the time domain.
  • a terminal having a transmitting unit for transmitting is provided.
  • LTE Long Term Evolution
  • LTE-Advanced 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 and the like. However, 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 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 a configuration example of a wireless communication system according to the embodiment of the present invention.
  • the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20 as shown in FIG.
  • FIG. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality 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 the radio signal are defined in the time domain and the frequency domain, the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain is defined by the number of subcarriers or the number of resource blocks. May be good.
  • 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. As shown in FIG.
  • 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 a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) by CA (Carrier Aggregation). Further, the terminal 20 may perform communication via the primary cell of the base station 10 by DC (Dual Connectivity) and the primary secondary cell (PSCell: Primary Secondary Cell) of another base station 10.
  • SCell Secondary Cell
  • PCell Primary Cell
  • CA Carrier Aggregation
  • 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). As shown in FIG. 1, the terminal 20 receives a control signal or data from the base station 10 by DL, and transmits the control signal or data to the base station 10 by UL, so that various types provided by the wireless communication system are provided. Use communication services.
  • M2M Machine-to-Machine
  • the terminal 20 uses the random access preamble or the UE (User Equipment) identifier as the UL signal as the base station. 10 is transmitted, and the base station 10 transmits information for performing random access response and collision resolution to the user device 20 as a DL signal.
  • the UE User Equipment
  • FIG. 2 is a sequence diagram for explaining an example of a 4-step random access procedure.
  • An example of a random access procedure shown in FIG. 2 is a contention-based 4-step random access procedure.
  • the user apparatus 20 transmits a random access preamble to the base station 10 as Msg1.
  • the base station 10 transmits a random access response to the terminal 20 as Msg2 (S12).
  • the terminal 20 transmits the UE identifier to the base station 10 as Msg3 (S13).
  • the base station 10 transmits information for performing collision resolution as Msg4 to the terminal 20. If the conflict resolution is successful, the random access procedure is successful and complete.
  • FIG. 3 is a sequence diagram for explaining an example of a two-step random access procedure.
  • An example of a random access procedure shown in FIG. 3 is a collision-type two-step random access procedure.
  • a two-step random access procedure is being considered to complete the random access procedure in a short period of time.
  • the terminal 20 transmits the random access preamble via PRACH and the data via PUSCH as MsgA to the base station 10.
  • the contents corresponding to Msg1 and Msg3 in the 4-step random access procedure may be transmitted via PUSCH.
  • the base station 10 transmits information for random access response and conflict resolution to the user apparatus 20 as MsgB (S22).
  • MsgB may include content corresponding to Msg2 and Msg4 in a 4-step random access procedure. If the conflict resolution is successful, the random access procedure is successful and complete. By adopting the 2-step random access procedure, effects such as low delay and reduction of power consumption are expected.
  • a non-collision type (contention free) random access can be executed by assigning a random access preamble from the base station 10 to the terminal 20. ..
  • MsgA consists of a random access preamble and PUSCH. It is assumed that the random access preamble and PUSCH are not integrated resources at least in the physical layer. For example, it is assumed that a random access preamble separated as a physical resource and PUSCH are defined as MsgA.
  • the MsgA-PUSCH transmission opportunity may be defined as one MsgA-PUSCH resource.
  • the MsgA-PRACH transmission opportunity (MsgA PRACH occurrence) may be defined as a resource for transmitting one MsgA-preamble.
  • the MsgA-PRACH slot is a slot that includes an MsgA-PRACH transmission opportunity.
  • the MsgA-PUSCH slot is a slot that includes an MsgA-PUSCH transmission opportunity.
  • the base station 10 notifies the terminal 20 of the information indicating the position of the MsgA-PRACH slot in the time domain and the information indicating the position of the MsgA-PUSCH slot in the time domain.
  • FIG. 4 is a diagram showing an example of resource allocation in a 2-step random access procedure. If the MsgA-PUSCH slot is notified by a time offset from the MsgA-PRACH slot start position, for example, when there is only one continuous UL slot as shown in FIG. 4, the time offset that can be specified is very large. It will be limited. In the case of the example shown in FIG. 4, 10 slots are specified as the time offset. Further, the time offsets that can be specified are 10 slots, 20 slots, 30 slots, and so on.
  • D indicates a DL slot.
  • U indicates a UL slot.
  • S indicates a special slot or an X slot, which is a slot composed of only DL symbols or only UL symbols, and may include DL symbols, UL symbols, and other symbols.
  • S is described as a special slot, but it may be replaced with an X slot.
  • time offset that can be specified is 1 slot, 2 slots, 3 slots, ...
  • time offset that is a multiple of 10 is used in the case of the example shown in FIG. .
  • time offset parameters that are not actually used, and it is necessary to increase the range of time offset values that can be specified by signaling.
  • the slot counted as the time offset may be limited to the UL slot only. That is, DL slots and special slots do not have to be counted. By not counting the DL slot and the special slot as the time offset, the signaling for notifying the time offset can be simplified.
  • FIG. 5 is a diagram showing a resource allocation example (1) of the two-step random access procedure according to the embodiment of the present invention.
  • the MsgA-PUSCH slot is arranged one slot later, so that the time offset is 1.
  • the base station 10 may notify the terminal 20 that it is a slot.
  • only UL slots are counted as time offsets, DL slots and special slots need not be counted.
  • the terminal 20 sets the position of the slot where the UL slot is counted by 1 from the start position of the MsgA-PRACH slot at the start position of the MsgA-PUSCH slot. Identify if there is.
  • FIG. 6 is a diagram showing a resource allocation example (2) of the two-step random access procedure according to the embodiment of the present invention.
  • the MsgA-PUSCH slot is arranged after 3 slots, so that the time offset is 3 You may be notified that it is a slot.
  • only UL slots are counted as time offsets, DL slots and special slots need not be counted.
  • the terminal 20 sets the position of the slot where the UL slot is counted 3 from the start position of the MsgA-PRACH slot at the start position of the MsgA-PUSCH slot. Identify if there is.
  • the slot counted as the time offset may be limited to the UL slot and the special slot. That is, DL slots do not have to be counted. By not counting the DL slot as a time offset, signaling when notifying the time offset can be simplified.
  • FIG. 7 is a diagram showing a resource allocation example (3) of the two-step random access procedure according to the embodiment of the present invention.
  • the UL slot and the special slot are counted from the start position of the MsgA-PRACH slot to the start position of the MsgA-PUSCH slot, one slot of the UL slot and one slot of the special slot, a total of 2 Slots are counted. That is, when the UL slot and the special slot are counted, the MsgA-PUSCH slot is arranged after 2 slots, so that the base station 10 may notify the terminal 20 that the time offset is 2 slots.
  • UL slots and special slots are counted as time offsets, and DL slots do not have to be counted.
  • the terminal 20 sets the position of the slot in which the UL slot or the special slot is counted by 2 from the start position of the MsgA-PRACH slot in the MsgA-PUSCH slot. Identify as the starting position.
  • FIG. 8 is a diagram showing a resource allocation example (4) of the two-step random access procedure according to the embodiment of the present invention.
  • FIG. 8 when the UL slots and special slots are counted from the start position of the MsgA-PRACH slot to the start position of the MsgA-PUSCH slot, 3 slots of the UL slot and 1 slot of the special slot, totaling 4 Slots are counted. That is, when the UL slot and the special slot are counted, the MsgA-PUSCH slot is arranged after 4 slots, so that the base station 10 may notify the terminal 20 that the time offset is 4 slots. As shown in FIG. 8, UL slots and special slots are counted as time offsets, and DL slots do not have to be counted.
  • the terminal 20 sets the position of the slot in which the UL slot or the special slot is counted by 4 from the start position of the MsgA-PRACH slot in the MsgA-PUSCH slot. Identify as the starting position.
  • the special slot described with reference to FIGS. 7 and 8 may be unconditionally counted as a time offset, and the special slot may be counted as a time offset when a certain condition is satisfied.
  • a certain condition may be a case where the ratio of UL symbols in the special slot is x or more. x may be, for example, 50%. Further, for example, a certain condition may be a case where the number of UL symbols in which one or a plurality of MsgA-PUSCH transmission opportunities can be arranged exists in the special slot.
  • the slots and symbols counted as the time offset are limited to the UL symbols of the UL slot and the special slot. You may. That is, the DL symbols of the DL slot and the special slot do not have to be counted. By not counting the DL symbols of the DL slot and the special slot as the time offset, it is possible to simplify the signaling when notifying the time offset.
  • FIG. 9 is a diagram showing a resource allocation example (5) of the two-step random access procedure according to the embodiment of the present invention.
  • the UL symbols of the UL slot and the special slot are counted from the start position of the MsgA-PRACH slot to the start position of the MsgA-PUSCH slot
  • the UL symbol of one slot of the UL slot and the UL symbol of the special slot are counted.
  • a total of 1 slot and 4 symbols of 4 symbols are counted. That is, when the UL symbols of the UL slot and the special slot are counted, the MsgA-PUSCH slot is arranged after 1 slot and 4 symbols, so that the time offset is 1 slot and 4 symbols from the base station 10 to the terminal 20. You may be notified.
  • the UL symbols of the UL slot and the special slot are counted as the time offset, and the DL symbols of the DL slot and the special slot do not have to be counted.
  • the terminal 20 counts 1 UL slot from the start position of the MsgA-PRACH slot and 4 counts the UL symbol of the special slot.
  • the position of the slot is specified as the start position of the MsgA-PUSCH slot.
  • FIG. 10 is a diagram showing a resource allocation example (6) of the two-step random access procedure according to the embodiment of the present invention.
  • the UL symbols of the UL slot and the special slot are counted from the start position of the MsgA-PRACH slot to the start position of the MsgA-PUSCH slot
  • the UL symbols of the 3 slots and the special slot of the UL slot are counted.
  • a total of 3 slots and 4 symbols of 4 symbols are counted. That is, when the UL symbols of the UL slot and the special slot are counted, the MsgA-PUSCH slot is arranged after the 3 slots and 4 symbols, so that the time offset is 3 slots and 4 symbols from the base station 10 to the terminal 20. You may be notified.
  • the UL symbols of the UL slot and the special slot are counted as a time offset, and the DL symbols of the DL slot and the special slot do not have to be counted.
  • the terminal 20 counts 3 UL slots from the start position of the MsgA-PRACH slot and 4 counts the UL symbols of the special slot.
  • the position of the slot is specified as the start position of the MsgA-PUSCH slot.
  • the UL symbol of the special slot described with reference to FIGS. 9 and 10 may be unconditionally counted as a time offset, and when a certain condition is satisfied, the UL symbol of the special slot is counted as a time offset. May be good.
  • a certain condition may be a case where the ratio of UL symbols in the special slot is x or more. x may be, for example, 50%. Further, for example, a certain condition may be a case where the number of UL symbols in which one or a plurality of MsgA-PUSCH transmission opportunities can be arranged exists in the special slot.
  • the value that can be notified as the time offset may be limited to the value according to the assumed TDD setting (configuration). Good.
  • the time offset may be limited to some of the number of slots that are multiples of 10. That is, the time offset may be limited to ⁇ 10 slots, 20 slots, 30 slots ⁇ and the like. Also, the time offset may be limited to some of the number of slots that are multiples of the other number. For example, the number of slots may be a multiple of 5, or the number of slots may be a multiple of 2. Further, for example, the time offset may be limited to slots that are assumed to be arranged in consecutive UL slots. For example, it may be limited to consecutive slots such as ⁇ 1 slot, 2 slots ⁇ .
  • the time offset may be ⁇ 1 slot, 2 slots, 10 slots, 20 slots ⁇ , ⁇ 1 slot, 2 slots, 10 slots, 11 slots, 20 slots, 21 slots ⁇ , or ⁇ 1 slot, It may be 2 slots, 9 slots, 10 slots, 11 slots, 19 slots, 20 slots, 21 slots ⁇ or the like. These time offsets may be notified from the base station 10 to the terminal 20 as one of the enumerated data.
  • the time offset is the time offset from the start position of the MsgA-PRACH slot to the start position of the MsgA-PUSCH slot, but a time offset specified at another position may be used.
  • it may be a time offset from the end position of the MsgA-PRACH slot to the end position of the MsgA-PUSCH slot, a time offset from the end position of the MsgA-PRACH slot to the start position of the MsgA-PUSCH slot, or MsgA.
  • -It may be a time offset from the start position of the PRACH slot to the end position of the MsgA-PUSCH slot.
  • the time offset from the start position of the MsgA-PRACH transmission opportunity to the start position of the MsgA-PUSCH slot may be used, or the time offset from the end position of the MsgA-PRACH transmission opportunity to the end position of the MsgA-PUSCH slot may be used. It may be a time offset from the end position of the MsgA-PRACH transmission opportunity to the start position of the MsgA-PUSCH slot, or a time offset from the start position of the MsgA-PRACH transmission opportunity to the end position of the MsgA-PUSCH slot. ..
  • the time offset from the start position of the MsgA-PRACH slot to the start position of the MsgA-PUSCH transmission opportunity may be used, or the time offset from the start position of the MsgA-PRACH slot to the end position of the MsgA-PUSCH transmission opportunity may be used. It may be a time offset from the end position of the MsgA-PRACH slot to the start position of the MsgA-PUSCH transmission opportunity, or a time offset from the end position of the MsgA-PRACH slot to the end position of the MsgA-PUSCH transmission opportunity.
  • it may be a time offset from the start position of the MsgA-PRACH transmission opportunity to the start position of the MsgA-PUSCH transmission opportunity, or a time offset from the start position of the MsgA-PRACH transmission opportunity to the end position of the MsgA-PUSCH transmission opportunity.
  • it may be a time offset from the end position of the MsgA-PRACH transmission opportunity to the start position of the MsgA-PUSCH transmission opportunity, or a time offset from the end position of the MsgA-PRACH transmission opportunity to the end position of the MsgA-PUSCH transmission opportunity.
  • the unit for designating the time offset may be a symbol, a system frame, a symbol and a slot, a system frame and a slot, or a symbol, a slot and a system frame.
  • the unit for designating the time offset may be the width of the time domain of the MsgA-PUSCH transmission opportunity.
  • the base station 10 notifies the terminal 20 of the position of the time domain of the PUSCH corresponding to the PRACH transmitting MsgA by the UL slot and the time offset for counting the UL symbol. be able to.
  • the position of the resource related to the random access procedure can be efficiently notified.
  • the base station 10 and the terminal 20 include a function of 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. 11 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 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140.
  • the functional configuration shown in FIG. 11 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 executed.
  • 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. In addition, 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 the setting of 2-step random access.
  • the control unit 140 controls the two-step random access as described in the embodiment.
  • 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. 12 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 transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240.
  • the functional configuration shown in FIG. 12 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 executed.
  • 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 connects the other terminal 20 to PSCCH (Physical Sidelink Control Channel), PSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel) as D2D communication. Etc., and the receiving unit 220 receives PSCCH, PSCH, PSDCH, PSBCH, etc. from the other terminal 20.
  • PSCCH Physical Sidelink Control Channel
  • PSCH 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, the setting of 2-step random access.
  • the control unit 240 controls the two-step random access 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 by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , 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 only these. I can't.
  • a functional block that functions transmission is called a transmitting unit (transmitting unit) or a transmitter (transmitter).
  • transmitting unit transmitting unit
  • transmitter transmitter
  • 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. 13 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 of the base station 10 and the terminal 20, the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, 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.
  • Processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be composed of 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 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. 11 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. 12 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
  • Processor 1001 may be implemented 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 (Read Only Memory), EPROM (Erasable Programmable ROM), EPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), 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® disk), a smart card, a flash memory (eg, a card, a stick, a key drive), a floppy® 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 receives 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 a 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 position in the time domain of the physical random access channel for transmitting the message used in the two-step random access procedure and the position in the time domain of the physical random access channel Used for the receiver that receives information indicating the time offset from the base station and the uplink from the position in the time domain of the physical random access channel indicated by the time offset to the position in the time domain of the physical uplink shared channel.
  • a control unit that identifies the position of the physical uplink shared channel in the time domain based on the length of the time domain, the position of the physical random access channel in the time domain, and the time domain of the physical uplink shared channel.
  • a terminal is provided that has a transmitter that transmits the message to the base station.
  • the base station 10 notifies the terminal 20 of the position of the time domain of the PUSCH corresponding to the PRACH transmitting MsgA by the UL slot and the time offset for counting the UL symbol. Can be done. That is, in the wireless communication system, the position of the resource related to the random access procedure can be efficiently notified.
  • the control unit has a first slot used for uplink from a position in the time domain of the physical random access channel indicated by the time offset to a position in the time domain of the physical uplink shared channel, and an uplink symbol. And, based on the length of the second slot in which the downlink symbol is placed, the position of the physical uplink shared channel in the time domain may be specified.
  • the terminal 20 can specify the position of the PUSCH time domain corresponding to the PRACH transmitting MsgA in the two-step random access procedure based on the time offset for counting the UL slot and the special slot.
  • the control unit of the physical uplink shared channel is based on the lengths of the second slot and the first slot.
  • the control unit identifies the position in the time region, and when the ratio of the uplink symbol in the second slot is less than the certain value, the physical uplink is based on the length of the first slot.
  • the location of the shared channel in the time domain may be specified.
  • the control unit uses the time area of the physical uplink shared channel based on the lengths of the second slot and the first slot.
  • the control unit specifies the position in the physical uplink shared channel in the time region of the physical uplink shared channel based on the length of the first slot. The position may be specified.
  • the control unit has a first slot used for uplink from a position in the time domain of the physical random access channel indicated by the time offset to a position in the time domain of the physical uplink shared channel, and an uplink symbol. And, in the second slot in which the downlink symbol is arranged, the position of the physical uplink shared channel in the time domain may be specified based on the length of the uplink symbol.
  • the terminal 20 counts the position of the PUSCH time domain corresponding to the PRACH transmitting MsgA, and the UL symbol of the UL slot and the UL symbol of the special slot including the UL symbol of a predetermined value or more. It can be specified based on the offset.
  • the position in the time domain of the physical random access channel for transmitting the message used in the two-step random access procedure and the time offset from the position in the time domain of the physical random access channel are determined.
  • the message is provided for a communication method in which the terminal executes a transmission procedure for transmitting the above-mentioned to the base station.
  • the base station 10 notifies the terminal 20 of the position of the time domain of the PUSCH corresponding to the PRACH transmitting MsgA by the UL slot and the time offset for counting the UL symbol. Can be done. That is, in the wireless communication system, the position of the resource related to the random access procedure can be efficiently notified.
  • the boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component.
  • 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, EEPROM, 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. Broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof may be used.
  • 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 suitable 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.
  • 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, it is clear that it can be done by at least one of (but not limited to, MME, S-GW, etc.).
  • 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, memory) or may be managed using a management table. Input / output information and the like can 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 true / false value (Boolean: true or false), or by comparing numerical values (for example). , Comparison with a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, 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, twist pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.) When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.
  • 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 absolute values, relative values from predetermined values, or using other corresponding information. It may be represented.
  • the radio resource may be one indicated by an index.
  • base station Base Station
  • radio base station base station
  • base station device fixed station
  • NodeB NodeB
  • eNodeB eNodeB
  • GNB gNodeB
  • access point “ transmission point ”,“ reception point ”,“ transmission / reception point ”,“ cell ”,“ sector ”
  • Terms such as “cell group,” “carrier,” and “component carrier” can 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 (for example, three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station 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 station and the base station subsystem that provides the communication service in this coverage. Point to.
  • MS Mobile Station
  • UE User Equipment
  • Mobile stations can be 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, depending on the trader. 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, the mobile body itself, or the like.
  • the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) 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 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 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 called 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 function of the base station 10 described above.
  • words such as "up” and “down” may be read as words corresponding to inter-terminal communication (for example, "side”).
  • an uplink channel, a downlink 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). (For example, searching in a table, database or another data structure), ascertaining may be regarded as “judgment” or “decision”.
  • judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access.
  • Accessing (for example, accessing data in memory) may be regarded as "judgment” or “decision”.
  • judgment and “decision” mean that 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 energies 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 applicable standard.
  • RS Reference Signal
  • Pilot Pilot
  • references to elements using designations such as “first”, “second”, etc. 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. Thus, 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. Subframes may further consist 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 that applies to at least one of the transmission and reception of a signal or channel.
  • Numerology includes, for example, subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, wireless frame configuration, and transmitter / receiver.
  • SCS subcarrier spacing
  • TTI Transmission Time Interval
  • 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 may be indicated.
  • the slot may be composed of one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.). Slots may be in 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 consist of one or more symbols in the time domain.
  • the mini-slot may also be referred to as a sub-slot.
  • a minislot may consist of a smaller number of symbols than the slot.
  • PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as 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
  • 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.
  • the 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.
  • TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
  • the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a 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 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.
  • 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.
  • the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
  • 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 wireless frame the number of slots per subframe or wireless 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) 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.
  • MsgA is an example of a message used in the 2-step random access procedure.
  • PRACH is an example of a physical random access channel.
  • PUSCH is an example of a physical uplink shared channel.
  • 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)
  • Mobile Radio Communication Systems (AREA)

Abstract

Ce terminal comprend : une unité de réception qui reçoit, en provenance d'une station de base, la position, dans un domaine temporel, d'un canal d'accès aléatoire physique sur lequel un message à utiliser pour une procédure d'accès aléatoire en deux étapes est transmis et des informations pour indiquer un décalage temporel à partir de la position du canal d'accès aléatoire physique dans le domaine temporel ; une unité de commande qui spécifie la position d'un canal partagé de liaison montante physique dans le domaine temporel sur la base de la longueur, dans le domaine temporel, qui est utilisée pour la liaison montante à partir de la position, indiquée par le décalage temporel, du canal d'accès aléatoire physique dans le domaine temporel à la position du canal partagé de liaison montante physique dans le domaine temporel ; et une unité de transmission qui transmet le message à la station de base au niveau de la position du canal d'accès aléatoire physique dans le domaine temporel et la position du canal partagé de liaison montante physique dans le domaine temporel.
PCT/JP2019/040340 2019-10-11 2019-10-11 Terminal et procédé de communication Ceased WO2021070396A1 (fr)

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