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WO2021140674A1 - Terminal et procédé de communication - Google Patents

Terminal et procédé de communication Download PDF

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Publication number
WO2021140674A1
WO2021140674A1 PCT/JP2020/000768 JP2020000768W WO2021140674A1 WO 2021140674 A1 WO2021140674 A1 WO 2021140674A1 JP 2020000768 W JP2020000768 W JP 2020000768W WO 2021140674 A1 WO2021140674 A1 WO 2021140674A1
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WO
WIPO (PCT)
Prior art keywords
information
cells
size
scheduling
terminal
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Application number
PCT/JP2020/000768
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English (en)
Japanese (ja)
Inventor
浩樹 原田
聡 永田
リフェ ワン
ギョウリン コウ
Original Assignee
株式会社Ｎｔｔドコモ
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 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to PCT/JP2020/000768 priority Critical patent/WO2021140674A1/fr
Priority to JP2021569713A priority patent/JP7420835B2/ja
Publication of WO2021140674A1 publication Critical patent/WO2021140674A1/fr
Priority to JP2024002610A priority patent/JP2024024117A/ja

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

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).
  • NR-DSS Dynamic Spectrum Sharing
  • the LTE system avoids the resources used to transmit the cell-specific reference signal or control signal, and the remaining resources are used to transmit the NR system signal.
  • NR-DSS aims at strengthening PDCCH (Physical Downlink Control Channel) for cross-carrier scheduling, for example.
  • PDCCH Physical Downlink Control Channel
  • a method of scheduling a PDSCH (Physical Downlink Shared Channel) or a PUSCH (Physical Uplink Shared Channel) of a primary cell or a primary secondary cell by a PDCCH of a secondary cell is being studied.
  • a method of scheduling a PDSCH of a plurality of cells using a single DCI (Downlink Control Information) by a primary cell, a primary secondary cell, or a PDCCH of the secondary cell is being studied.
  • the RRC (Radio Resource Control) setting of each serving cell is independent, so it is assumed that the required DCI size differs for each serving cell to be scheduled.
  • the size of the single DCI needs to be determined in consideration of the size of the DCI of each serving cell.
  • the present invention has been made in view of the above points, and an object of the present invention is to determine the size of a single control information used for scheduling a plurality of cells in a wireless communication system.
  • the size of the information for scheduling the plurality of cells is the size of the information for scheduling the plurality of cells, and the size of the information for scheduling the plurality of cells is set to the size of the information for scheduling the plurality of cells. It has a control unit that determines based on at least one of them, and the receiving unit is provided with a terminal that acquires information for scheduling the plurality of cells based on the determined size.
  • 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, 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 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 (1) of a wireless communication system according to an embodiment of the present invention.
  • the base station 10 and the terminal 20 are included.
  • FIG. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.
  • the terminal 20 may be referred to as a "user device”.
  • the wireless communication system in the present embodiment may be called an NR-U system.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • the physical resources of a radio signal are defined in the time domain and frequency domain, the time domain may be defined by slots or OFDM symbols, and the frequency domain may be defined by subbands, subcarriers or resource blocks.
  • the base station 10 transmits control information or data to the terminal 20 by DL (Downlink), and receives control information 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). As shown in FIG. 1, the terminal 20 receives control information or data from the base station 10 on the DL and transmits the control information or data to the base station 10 on the UL, thereby providing various types provided by the wireless communication system. Use communication services.
  • M2M Machine-to-Machine
  • FIG. 2 is a diagram showing a configuration example (2) of the wireless communication system according to the embodiment of the present invention.
  • FIG. 2 shows a configuration example of a wireless communication system when NR-DC (NR-Dual connectivity) is executed.
  • a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided.
  • the base station 10A and the base station 10B are each connected to the core network 30.
  • the terminal 20 communicates with both the base station 10A and the base station 10B.
  • the cell group provided by the MN base station 10A is called an MCG (Master Cell Group), and the cell group provided by the SN base station 10B is called an SCG (Secondary Cell Group).
  • MCG Master Cell Group
  • SCG Secondary Cell Group
  • NR-DSS aims at strengthening PDCCH) for cross-carrier scheduling, for example.
  • a method of scheduling a PDSCH (Physical Downlink Shared Channel) or a PUSCH (Physical Uplink Shared Channel) of a primary cell or a primary secondary cell by a PDCCH of a secondary cell is being studied.
  • a method of scheduling a PDSCH of a plurality of cells using a single DCI (Downlink Control Information) by a primary cell, a primary secondary cell, or a PDCCH of the secondary cell is being studied.
  • “cell”, “carrier”, “component carrier (CC)” or “serving cell” may or may not be distinguished from each other.
  • FIG. 3 is a sequence diagram for explaining signaling in the embodiment of the present invention.
  • the base station 10 may transmit system information including a specific IE (Information Element) to the terminal 20.
  • the base station 10 may individually transmit RRC (Radio Resource Control) signaling including a specific IE to the terminal 20. Either step S1 and step S2 may be executed, or the execution order may be reversed.
  • the specific IE may be, for example, at least one of SIB1 (System Information Block 1), another SIB, servingCellConfig, and the like.
  • SIB1 System Information Block 1
  • another SIB servingCellConfig
  • the terminal 20 executes scheduled communication with the base station 10.
  • FIG. 4 is a diagram showing an example of cross-carrier scheduling.
  • the DCI transmitted from the base station 10 to the terminal 20 via the PDCCH of CC # 1 for example, the PDSCH of CC # 2 and CC # 3 is cross-carrier scheduled.
  • the cross-carrier scheduling is an example of scheduling a plurality of cells with a single control information.
  • the PDSCH of CC # 3 is cross-carrier scheduled by the DCI transmitted from the base station 10 to the terminal 20 via the PDCCH of CC # 1.
  • the cross-carrier scheduling is an example of single-cell scheduling with a single control information. Further, as shown in FIG.
  • the PDSCHs of CC # 3 and CC # 4 are cross-carrier scheduled by the DCI transmitted from the base station 10 to the terminal 20 via the PDCCH of CC # 1.
  • the cross-carrier scheduling is an example of scheduling a plurality of cells with a single control information.
  • the scheduled PDSCH may be replaced with the scheduled PUSCH.
  • CIF Carrier indicator field
  • PCell primary cell
  • SCell secondary cell
  • PDSCH and PUSCH of the secondary cell are always scheduled by the PDCCH in another serving cell.
  • RRC settings eg PDSCH-Config
  • Different RRC settings can result in different sizes of UE-specific non-fallback DCIs.
  • the sizes of DCI format 1_1 and / or DCI format 1-22 in different serving cells may be different.
  • the terminal 20 is a PDCCH for a total of up to 4 sizes of DCI formats, including up to 3 sizes of DCI formats with CRC (Cyclic Redundancy Check) scrambled by C-RNTI (Cell Radio Network Temporary Identifier) for each serving cell. Has the ability to monitor candidates.
  • the terminal 20 counts the number of DCI format sizes per serving cell based on the number of PDCCH candidates set in each search space set corresponding to the enabled DL-BWP (Bandwidth part).
  • future NR will support scheduling PDSCH from primary cell, primary secondary cell or secondary cell to multiple cells using a single DCI.
  • the difference in the setting of the upper layer to be set for each scheduled cell affects the size of DCI. It is necessary to define a method for determining the size of a single DCI that schedules PDSCH in multiple cells. It is also necessary to define how to count the DCI size of the scheduled cells.
  • FIG. 5 is a flowchart for explaining an example (1) of acquiring DCI in the embodiment of the present invention.
  • the operation of the terminal 20 for acquiring DCI in step S3 shown in FIG. 3 will be described with reference to FIG.
  • step S11 the terminal 20 schedules a plurality of cells based on the number of bits of the field having the maximum number of required information bits among the DCI fields of each scheduled cell. Determine the number of bits in. Step S11 may be performed for all fields, for each field of DCI. For example, the terminal 20 may determine the bit length of each field of a single DCI that schedules a plurality of cells to be the maximum bit length among the corresponding fields of the plurality of cells.
  • the terminal 20 will interpret the field as the scheduled cell of the field.
  • LSB least significant bits
  • MSBs MSsignificant bits
  • step S12 the terminal 20 determines the size of a single DCI that schedules a plurality of cells based on the number of bits of each determined field.
  • step S13 the terminal 20 acquires a single DCI based on the size of the determined single DCI.
  • FIG. 6 is a flowchart for explaining an example (2) of acquiring DCI in the embodiment of the present invention.
  • the operation of the terminal 20 for acquiring DCI in step S3 shown in FIG. 3 will be described with reference to FIG.
  • step S21 the terminal 20 schedules a plurality of cells based on the number of bits of the field having the minimum number of required information bits among the DCI fields of each scheduled cell. Determine the number of bits in. Step S21 may be performed for all fields, for each field of DCI. For example, the terminal 20 may determine the bit length of each field of a single DCI that schedules a plurality of cells to be the minimum bit length among the corresponding fields of the plurality of cells.
  • the terminal 20 needs to interpret the field when interpreting the field.
  • Zero "0" may be added to the beginning of the field until the size is reached.
  • the terminal 20 may add zeros "0" to the end of the field until it reaches the size required to interpret the field.
  • step S22 the terminal 20 determines the size of a single DCI that schedules a plurality of cells based on the number of bits of each determined field. Subsequently, in step S23, the terminal 20 acquires a single DCI based on the size of the determined single DCI.
  • FIG. 7 is a flowchart for explaining an example (3) of acquiring DCI in the embodiment of the present invention.
  • the operation of the terminal 20 for acquiring DCI in step S3 shown in FIG. 3 will be described with reference to FIG. 7.
  • step S31 the terminal 20 determines the number of bits of a single DCI that schedules a plurality of cells based on the number of information bits required for the cells to be scheduled. Subsequently, in step S32, the terminal 20 acquires a single DCI based on the size of the determined single DCI.
  • the bit length of each field of the single DCI may be the bit length required for the field of the cell to be scheduled.
  • the terminal 20 will schedule more than one of the fields when interpreting the fields.
  • LSB least significant bits
  • MSBs MSBs (Most significant bits) of a size required for the scheduled cell in the field when interpreting the field.
  • the terminal 20 needs to interpret the field when interpreting the field.
  • Zero "0" may be added to the beginning of the field until the size is reached.
  • the terminal 20 may add zeros "0" to the end of the field until it reaches the size required to interpret the field.
  • the terminal 20 does not have to assume that in all scheduled cells, the bit length of the field contained in the DCI format is greater than the bit length of the corresponding field contained in the DCI format of the cell to be scheduled. ..
  • the bit length of a field in the DCI format of a scheduled cell is not equal to the bit length of the corresponding field in the DCI format of the scheduling cell, then the corresponding field in the DCI format of the scheduling cell Zero "0" may be added to the beginning of the field until the bit length of is equal to the bit length of the field contained in the DCI format of the scheduled cell.
  • FIG. 8 is a flowchart for explaining an example (4) of acquiring DCI in the embodiment of the present invention. The operation of the terminal 20 for acquiring DCI in step S3 shown in FIG. 3 will be described with reference to FIG.
  • step S41 the terminal 20 determines the number of bits of a single DCI to schedule a plurality of cells based on the number of information bits required for any of the scheduled cells. Subsequently, in step S42, the terminal 20 acquires a single DCI based on the size of the determined single DCI.
  • the terminal 20 does not have to assume that the bit length of the field included in the DCI format of the scheduled cell is different from the bit length of the corresponding field included in the DCI format of the other scheduled cell.
  • the size of the non-fallback single DCI that schedules PDSCH or PUSCH in a plurality of cells may be counted by the method of 1) -3) below.
  • the size of the single DCI is counted in any one of the scheduled cells. Any one of the scheduled cells may be the cell with the smallest cell index or the cell with the largest cell index. 2) The size of the single DCI is counted in all scheduled cells. 3) The size of the single DCI is counted in the scheduling cell.
  • the size of some fields of a non-fallback single DCI that schedules PDSCH or PUSCH in multiple cells may be determined based on the total number of information bits required for each scheduled cell. Also, for example, the size of some fields in the single DCI may be determined to be twice the information bits required for a scheduled cell to ensure flexibility. Also, for example, the size of some fields of the single DCI may be determined by the sum of the sizes of the information bits required for each scheduled cell to ensure flexibility.
  • the different fields included in the non-fallback single DCI that schedules PDSCH or PUSCH in a plurality of cells may differ from each other in the method of acquiring the DCI bit field described in FIGS. 5, 6, 7, or 8.
  • the method of determining its size may be different.
  • single DCI may be replaced with “two or more DCIs”.
  • the terminal 20 can determine the size of a non-fallback single DCI that schedules PDSCH or PUSCH in a plurality of cells. In addition, the terminal 20 can count the number of sizes of a non-fallback single DCI that schedules PDSCH or PUSCH in a plurality of cells.
  • the size of a single control information used for scheduling multiple cells can be determined.
  • 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. 9 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. 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 executed.
  • the transmission unit 110 has 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 wirelessly 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 signal, reference signal and the like to the terminal 20. In addition, the receiving unit 120 receives a message between network nodes from another network node.
  • the transmitting unit 110 and the receiving unit 120 may be combined to form a communication unit.
  • the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads the setting information from the storage device as needed.
  • the content of the setting information is, for example, information required for DSS technology and cross-carrier scheduling.
  • the control unit 140 controls the DSS technology as described in the embodiment. In addition, the control unit 140 controls the cross-carrier scheduling.
  • 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. 10 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. 10 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 has a function of creating a transmission signal from transmission data and wirelessly transmitting 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 the PSCCH, PSCH, PSDCH, PSBCH, etc. from the other terminal 20.
  • the transmitting unit 210 and the receiving unit 220 may be combined to form a communication unit.
  • the setting unit 230 stores various setting information received from the base station 10 or the terminal 20 by the receiving unit 220 in the storage device, and reads it out from the storage device as needed.
  • the setting unit 230 also stores preset setting information.
  • the content of the setting information is, for example, information required for DSS technology and cross-carrier scheduling.
  • the control unit 240 controls the DSS technology in the terminal 20 as described in the embodiment. In addition, the control unit 240 controls the cross-carrier scheduling.
  • 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.
  • a functional block that makes transmission function 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. 11 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. 9 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. 10 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), EEPROM (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® disc), a smart card, a flash memory (eg, a card, a stick, a key drive), a floppy® disc, a magnetic strip, and the like.
  • the recording 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 size of the receiving unit that receives the information for scheduling a plurality of cells from the base station and the size of the information for scheduling the plurality of cells are set to the plurality of cells.
  • the terminal 20 can determine the size of a non-fallback single DCI that schedules PDSCH or PUSCH in a plurality of cells. That is, in a wireless communication system, the size of a single control information used for scheduling a plurality of cells can be determined.
  • the control unit may determine the size of the information for scheduling the plurality of cells based on the maximum size of the information to be scheduled corresponding to each of the plurality of cells.
  • the terminal 20 can determine the size of the non-fallback single DCI that schedules the PDSCH or PUSCH in the plurality of cells based on the size of the DCI of the scheduled cell.
  • the control unit uses LSB (LSB) among bits indicating information for scheduling the plurality of cells corresponding to the maximum size. Least significant bits) or MSB (Most significant bits) may be used. With this configuration, the terminal 20 can determine the size of the non-fallback single DCI that schedules the PDSCH or PUSCH in the plurality of cells based on the size of the DCI of the scheduled cell.
  • the control unit may determine the size of the information for scheduling the plurality of cells based on the smallest size of the information to be scheduled corresponding to each of the plurality of cells.
  • the terminal 20 can determine the size of the non-fallback single DCI that schedules the PDSCH or PUSCH in the plurality of cells based on the size of the DCI of the scheduled cell.
  • the control unit may determine the size of the information for scheduling the plurality of cells based on the size of the information to be scheduled corresponding to any of the plurality of cells.
  • the terminal 20 can determine the size of the non-fallback single DCI that schedules the PDSCH or PUSCH in the plurality of cells based on the size of the DCI of the scheduled cell.
  • the receiving procedure for receiving the information for scheduling a plurality of cells from the base station and the size of the information for scheduling the plurality of cells are scheduled corresponding to each of the plurality of cells.
  • the terminal executes a control procedure that determines based on at least one of the sizes of information to be performed, and the receiving procedure includes a procedure of acquiring information for scheduling the plurality of cells based on the determined size. The method is provided.
  • the terminal 20 can determine the size of a non-fallback single DCI that schedules PDSCH or PUSCH in a plurality of cells. That is, in a wireless communication system, the size of a single control information used for scheduling a plurality of cells can be determined.
  • 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 boolean 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, 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 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” refers to 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, 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 communication between terminals (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.
  • 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. Further, the mini slot may 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 the 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 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.
  • 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, minislots 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 in a slot, the number of symbols and RBs contained in a slot or minislot, and the number of RBs.
  • 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.
  • DCI or the field included in DCI is an example of scheduling information.
  • the DCI for scheduling a plurality of cells is an example of information for scheduling a plurality of cells.
  • the DCI of each scheduled cell is an example of scheduling information corresponding to each of a plurality of cells.
  • 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 30 Core network 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 des informations pour planifier de multiples cellules en provenance d'une station de base; et une unité de commande qui détermine la taille des informations pour planifier de multiples cellules, sur la base d'au moins l'une des tailles des éléments d'informations pour une planification correspondant respectivement à de multiples cellules. L'unité de réception acquiert les informations pour planifier les multiples cellules sur la base de la taille déterminée.
PCT/JP2020/000768 2020-01-10 2020-01-10 Terminal et procédé de communication WO2021140674A1 (fr)

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JP2021569713A JP7420835B2 (ja) 2020-01-10 2020-01-10 端末及び通信方法
JP2024002610A JP2024024117A (ja) 2020-01-10 2024-01-11 端末及び通信方法

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WO2023206391A1 (fr) * 2022-04-29 2023-11-02 Apple Inc. Conception de dci pour prendre en charge des dci uniques planifiant de multiples cellules
WO2023206305A1 (fr) * 2022-04-28 2023-11-02 富士通株式会社 Procédé et appareil d'émission-réception de données

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WO2023206305A1 (fr) * 2022-04-28 2023-11-02 富士通株式会社 Procédé et appareil d'émission-réception de données
WO2023206391A1 (fr) * 2022-04-29 2023-11-02 Apple Inc. Conception de dci pour prendre en charge des dci uniques planifiant de multiples cellules

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JP7420835B2 (ja) 2024-01-23
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