WO2021140676A1 - Terminal et procédé de communication - Google Patents

Terminal et procédé de communication Download PDF

Info

Publication number
WO2021140676A1
WO2021140676A1 PCT/JP2020/000770 JP2020000770W WO2021140676A1 WO 2021140676 A1 WO2021140676 A1 WO 2021140676A1 JP 2020000770 W JP2020000770 W JP 2020000770W WO 2021140676 A1 WO2021140676 A1 WO 2021140676A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
search space
information
base station
cells
Prior art date
Application number
PCT/JP2020/000770
Other languages
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/JP2020/000770 priority Critical patent/WO2021140676A1/fr
Priority to JP2021569715A priority patent/JPWO2021140676A1/ja
Publication of WO2021140676A1 publication Critical patent/WO2021140676A1/fr
Priority to JP2024024861A priority patent/JP2024051002A/ja

Links

Images

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

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 plurality of cells of PDSCH or PUSCH by using a primary cell, a primary secondary cell, or a secondary cell PDCCH using a single DCI (Downlink Control Information) is being studied.
  • the terminal When the base station schedules each PDSCH in a plurality of cells by a single DCI, the terminal needs to monitor the search space corresponding to the plurality of scheduled cells.
  • the present invention has been made in view of the above points, and an object of the present invention is to determine a search space to be monitored by a terminal in a wireless communication system.
  • a search is performed based on a receiver that receives a first information for setting scheduling and a single second information for executing scheduling of a plurality of cells from a base station, and the first information.
  • the receiving unit includes a control unit that monitors the space, and the receiving unit is provided with a terminal that receives the second information from the base station in the search space.
  • 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.
  • the scheduled carriers may be associated with only one scheduling carrier for both DL and UL. Since the terminal 20 links the scheduled cell and the scheduled cell, the same search space ID may be used.
  • the terminal 20 applies the search space to the scheduled cell only when both the DL-BWP (Bandwidth part) in which the linked search space is set are active in the scheduling cell and the scheduled cell. More specifically, in the cross-carrier scheduling, the following operations 1) -4) may be performed.
  • PDCCH-Config which is an RRC (Radio Resource Control) information element of the scheduled cell.
  • the value of the information element nrovCandates indicating the number of PDCCH candidates for each aggregation level applied to the scheduled cell is provided by the search space of one scheduled cell.
  • FIG. 3 is a sequence diagram for explaining an example of 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 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.
  • At least one of step S1 and step S2 may execute the setting related to scheduling by DCI.
  • the base station 10 schedules a plurality of cells or a single cell PDSCH or PUSCH to the terminal 20 by DCI.
  • the terminal 20 executes scheduled communication with the base station 10.
  • the scheduled communication may be DL or UL.
  • FIG. 4 is a diagram showing an example of cross-carrier scheduling to a plurality of cells or a single cell.
  • 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.
  • the single control information may be replaced with a plurality of control information.
  • 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.
  • FIG. 5 is a diagram for explaining an example of the search space in Release 15. As shown in FIG. 5, in release 15, when base station 10 schedules each PDSCH at CC # y and CC # z by a single PDCCH at CC # x, a search for multiple scheduled cells. It is necessary to specify the PDCCH monitoring operation of the terminal 20 at the time of space setting and cross-carrier scheduling.
  • BWP # 1 and BWP # 2 are set in CC # x to be scheduled.
  • SS (Search Space) # 1 and SS # 2 are set for BWP # 1.
  • SS # 3 and SS # 4 are set for BWP # 2.
  • the number of candidates for each aggregation level is set by nrovCandates, respectively.
  • BWP # 1 is set in the scheduled CC # y.
  • SS # 1, SS # 2, SS # 3 and SS # 4 are set for BWP # 1.
  • the number of candidates for each aggregation level is set by nrovCandates, respectively.
  • BWP # 1 and BWP # 2 are set in the scheduled CC # z.
  • SS # 1 is set for BWP # 1.
  • SS # 2 SS # 3 and SS # 4 are set for BWP # 2.
  • the number of candidates for each aggregation level is set by nrovCandates, respectively.
  • the terminal 20 may reuse the search space setting in Release 15 because it supports scheduling of a plurality of cells using a single PDCCH.
  • the terminal 20 does not have to apply the search space limitation for the scheduled cells to the search space for cross-carrier scheduling.
  • the terminal 20 when the scheduling of a plurality of cells by a single DCI is set or enabled, the terminal 20 has a DL-BWP in which the associated search space is set in the plurality of scheduled cells and the scheduled cells.
  • the search space having the same search space ID among the cells is used as the search space associated with the plurality of scheduled cells. May be applied.
  • FIG. 6 is a diagram for explaining an example of a search space according to an embodiment of the present invention.
  • each BWP # 1 is all active and each BWP # 2 is all inactive.
  • the search space and nrovCandates shown in FIG. 6 may be set by the system information received by the terminal 20 in step S1 of FIG. 3 or the RRC message received by the terminal 20 in step S2.
  • the terminal 20 When multi-cell scheduling with a single DCI is set or enabled, the terminal 20 is the smallest of the nrovCandates set in the search space with the same search space ID for each of the scheduled multi-cells.
  • the value may be used to monitor PDCCH.
  • CC # y is ⁇ (AL1: n0); (AL2: n2); (AL4: n4); (AL8). : N1); (AL16: n0) ⁇
  • CC # z is ⁇ (AL1: n0); (AL2: n2); (AL4: n2); (AL8: n2); (AL16: n0) ⁇ .
  • the search spaces nrovCandates that schedule multiple cells are ⁇ (AL1: n0); (AL2: n2); (AL4: n2); (AL8: n1); (AL16: n0). ⁇ May be used.
  • the number of PDCCH candidates at aggregation level 1 is 0, and the aggregation level is It means that the number of PDCCH candidates of 2 is 2, the number of PDCCH candidates of aggregation level 4 is 4, the number of PDCCH candidates of aggregation level 8 is 1, and the number of PDCCH candidates of aggregation level 16 is 0.
  • the terminal 20 is subjected to the terminal 20.
  • the PDCCH may be monitored using the value of nrovCandates set in the search space that has the same search space ID as the cell that schedules the single cell to be scheduled. For example, in CC # y and CC # z shown in FIG. 6, when SS # 2 is applied, CC # y is ⁇ (AL1: n0); (AL2: n2); (AL4: n4); (AL8).
  • the nofCandates may be ⁇ (AL1: n0); (AL2: n2); (AL4: n4); (AL8: n1); (AL16: n0) ⁇ .
  • the search space SS # common to a plurality of cells (CC # y and CC # z)
  • the PDCCH may be monitored by using the value obtained by subtracting the smallest value of the nof candidates set to 1. For example, in CC # y and CC # z shown in FIG. 6, when SS # 1 is applied, CC # y is ⁇ (AL1: n0); (AL2: n2); (AL4: n4); (AL8).
  • the terminal 20 when the scheduling of a plurality of cells by a single DCI is set or enabled, the terminal 20 is set in the search space having the same search space ID for each of the plurality of cells to be scheduled.
  • the highest value may be used to monitor the PDCCH.
  • CC # y is ⁇ (AL1: n0); (AL2: n2); (AL4: n4); (AL8). : N1); (AL16: n0) ⁇
  • CC # z is ⁇ (AL1: n0); (AL2: n2); (AL4: n2); (AL8: n2); (AL16: n0) ⁇ .
  • the search spaces nrovCandates that schedule multiple cells are ⁇ (AL1: n0); (AL2: n2); (AL4: n4); (AL8: n2); (AL16: n0). ⁇ May be used.
  • the terminal 20 is set in the search space of the cell to be scheduled instead of the nrovCandates set in the search space associated with the plurality of cells.
  • PDCCH may be monitored using the provided nrovCandates. For example, when CC # y and CC # z shown in FIG.
  • the scheduled CC # x SS # 1 nrovCandates ⁇ (AL1: n0); (AL2: n2); (AL4: n4); (AL8: n2); (AL16: n0) ⁇ may be used, or SS # 2's nrovChannelates ⁇ (AL1: n0); (AL2: n2); (AL4: n4); (AL8: n2); (AL16: n0) ⁇ may be used.
  • the terminal 20 when the scheduling of a plurality of cells by a single DCI is set or enabled, the terminal 20 is set in the search space of the cell having the smallest cell index or the largest cell index among the scheduled cells.
  • the PDCCH may be monitored using the configured nrovCandates.
  • the terminal 20 monitors the PDCCH by using the nrovCandates set in the search space of the cell having the smallest nrovCandates or the largest nrovCandates among the nrovCandates set in the scheduled search space of a plurality of cells. May be good.
  • the terminal 20 When the scheduling of a plurality of cells by a single DCI is set or enabled, the terminal 20 is a search space associated with the single cell to be scheduled and the search space ID existing only in the cell to be scheduled. And when the scheduled single cell and the DL-BWP set in the scheduled cell are all active, the search space may be applied as the search space associated with the scheduled single cell. The terminal 20 may also monitor the PDCCH using nrovCandedates set in the search space associated with the scheduled single cell.
  • the terminal 20 may reuse the search space setting in Release 15 because it supports scheduling of a plurality of cells using a single PDCCH.
  • the terminal 20 may apply the search space limitation for the scheduled cells to the search space for cross-carrier scheduling.
  • the multiple cells to be scheduled and the search spaces having the same search space ID in the cells to be scheduled may be associated with each other.
  • the terminal 20 does not have to assume that different search space IDs are set in the search spaces associated with the plurality of cells scheduled by the single PDCCH.
  • the terminal 20 may have a different search space ID set in the search space associated with the plurality of scheduled cells.
  • the terminal 20 sets the DL-BWP in the scheduling cell in which the associated search space is set and the scheduled cell. If all are active, the search space may be applied as a scheduled search space for multiple cells.
  • the terminal 20 sets different nrovCandates in the search space of the same search space ID associated with the scheduled plurality of cells. It is not necessary to assume that it will be done.
  • the terminal 20 can specify the search space for receiving the PDCCH that schedules a plurality of cells by a single DCI.
  • the terminal 20 can specify the number of candidates for receiving the PDCCH that schedules a plurality of cells.
  • the search space monitored by the terminal in the wireless communication system 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. 7 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. 7 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 scheduling.
  • the control unit 140 controls the DSS technology as described in the embodiment. Further, the control unit 140 controls the 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. 8 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. 8 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be 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 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 scheduling. In addition, the control unit 240 controls the PDCCH reception.
  • 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. 9 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. 7 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. 8 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 receiving unit that receives the first information for setting the scheduling and the single second information for executing the scheduling of a plurality of cells from the base station.
  • the receiving unit includes a control unit that monitors the search space based on the first information, and the receiving unit is provided with a terminal that receives the second information from the base station in the search space.
  • the terminal 20 can specify the search space for receiving the PDCCH that schedules a plurality of cells.
  • the terminal 20 can specify the number of candidates for receiving the PDCCH that schedules a plurality of cells. That is, in the wireless communication system, the search space monitored by the terminal in the wireless communication system can be determined.
  • the control unit has the same search space identifier set in each of the cell receiving the second information and the plurality of cells, and is set in each of the cell receiving the second information and the plurality of cells.
  • the search space having the same search space identifier may be monitored.
  • the terminal 20 can specify a search space for receiving the PDCCH that schedules a plurality of cells.
  • the control unit may monitor the search space by using the minimum value for each aggregation level among the number of PDCCH candidates for each aggregation level set in each of the plurality of cells.
  • the terminal 20 can specify the number of candidates for the terminal 20 to receive the PDCCH that schedules a plurality of cells.
  • the control unit may monitor the search space using the maximum value for each aggregation level among the number of PDCCH candidates for each aggregation level set in each of the plurality of cells.
  • the terminal 20 can specify the number of candidates for the terminal 20 to receive the PDCCH that schedules a plurality of cells.
  • the control unit may monitor the search space using the number of PDCCH candidates for each aggregation level set in the cell that receives the second information.
  • the terminal 20 can specify the number of candidates for the terminal 20 to receive the PDCCH that schedules a plurality of cells.
  • a reception procedure for receiving a first information for setting scheduling and a single second information for executing scheduling of a plurality of cells from a base station, and the first information. Based on the above, the terminal executes a control procedure for monitoring the search space, and the reception procedure provides a communication method including a procedure for receiving the second information from the base station in the search space.
  • the terminal 20 can specify the search space for receiving the PDCCH that schedules a plurality of cells.
  • the terminal 20 can specify the number of candidates for receiving the PDCCH that schedules a plurality of cells. That is, in the wireless communication system, the search space monitored by the terminal in the wireless communication system 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.
  • RRC signaling or system information is an example of the first information.
  • DCI is an example of the second information.
  • 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

Landscapes

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

Abstract

La présente invention concerne un terminal qui comprend : une unité de réception qui reçoit, d'une station de base, des premières informations pour configurer une planification et un seul élément de secondes informations pour effectuer une planification d'une pluralité de cellules; et une unité de commande qui surveille un espace de recherche sur la base des premières informations. L'unité de réception reçoit, de la station de base, les secondes informations dans l'espace de recherche.
PCT/JP2020/000770 2020-01-10 2020-01-10 Terminal et procédé de communication WO2021140676A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2020/000770 WO2021140676A1 (fr) 2020-01-10 2020-01-10 Terminal et procédé de communication
JP2021569715A JPWO2021140676A1 (fr) 2020-01-10 2020-01-10
JP2024024861A JP2024051002A (ja) 2020-01-10 2024-02-21 端末及び通信方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/000770 WO2021140676A1 (fr) 2020-01-10 2020-01-10 Terminal et procédé de communication

Publications (1)

Publication Number Publication Date
WO2021140676A1 true WO2021140676A1 (fr) 2021-07-15

Family

ID=76788527

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/000770 WO2021140676A1 (fr) 2020-01-10 2020-01-10 Terminal et procédé de communication

Country Status (2)

Country Link
JP (2) JPWO2021140676A1 (fr)
WO (1) WO2021140676A1 (fr)

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"Maintenance for carrier aggregation and bandwidth parts", 3GPP TSG RAN WG1 MEETING #95 R1-1813401, 3 November 2018 (2018-11-03), XP051479723 *
HUAWEI ET AL.: "Discussion on low latency SCell activation and efficient SCell management", 3GPP TSG RAN WG1 #99 R1-1911875, 9 November 2019 (2019-11-09), XP051823057 *
VIVO: "Discussion on the search space configuration of cross-carrier scheduling", 3GPP TSG RAN WG1 MEETING #95 R1-1812277, 3 November 2018 (2018-11-03), XP051554169 *

Also Published As

Publication number Publication date
JPWO2021140676A1 (fr) 2021-07-15
JP2024051002A (ja) 2024-04-10

Similar Documents

Publication Publication Date Title
WO2020194760A1 (fr) Dispositif utilisateur et dispositif de station de base
WO2021157090A1 (fr) Terminal et procédé de communication
WO2020230201A1 (fr) Dispositif utilisateur et dispositif de station de base
WO2021140673A1 (fr) Terminal et procédé de communication
WO2021140674A1 (fr) Terminal et procédé de communication
WO2020235318A1 (fr) Équipement utilisateur et dispositif de station de base
WO2021149110A1 (fr) Terminal et procédé de communication
JP7073529B2 (ja) 端末、基地局及び通信方法
WO2021149246A1 (fr) Terminal, station de base, et procédé de communication
WO2020246185A1 (fr) Terminal et station de base
WO2022029947A1 (fr) Terminal, dispositif de station de base et procédé de rétroaction
WO2021140677A1 (fr) Terminal et procédé de communication
WO2021038920A1 (fr) Terminal, station de base et procédé de communication
JP7170842B2 (ja) ユーザ装置及び基地局装置
WO2020157874A1 (fr) Dispositif utilisateur et dispositif de station de base
WO2020157873A1 (fr) Dispositif d'utilisateur et dispositif de station de base
WO2020194746A1 (fr) Dispositif utilisateur et dispositif de station de base
WO2020161824A1 (fr) Dispositif utilisateur et dispositif de station de base
WO2020170445A1 (fr) Dispositif utilisateur et dispositif de station de base
WO2021140676A1 (fr) Terminal et procédé de communication
WO2021161455A1 (fr) Terminal et procédé de transmission d'informations de capacité
WO2022030022A1 (fr) Terminal et procédé de communication
WO2022153551A1 (fr) Terminal et procédé de communication
WO2022029946A1 (fr) Terminal, dispositif de station de base et procédé de rétroaction
WO2021161476A1 (fr) Terminal et procédé de communication

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20913017

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021569715

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20913017

Country of ref document: EP

Kind code of ref document: A1