WO2022055336A1 - Procédé et dispositif de transmission ou de réception de données à l'aide d'une pluralité de cellules - Google Patents

Procédé et dispositif de transmission ou de réception de données à l'aide d'une pluralité de cellules Download PDF

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Publication number
WO2022055336A1
WO2022055336A1 PCT/KR2021/012590 KR2021012590W WO2022055336A1 WO 2022055336 A1 WO2022055336 A1 WO 2022055336A1 KR 2021012590 W KR2021012590 W KR 2021012590W WO 2022055336 A1 WO2022055336 A1 WO 2022055336A1
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Prior art keywords
cell
secondary cell
primary
information
scheduling
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PCT/KR2021/012590
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English (en)
Korean (ko)
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박규진
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주식회사 케이티
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Priority claimed from KR1020210111544A external-priority patent/KR20220035013A/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Publication of WO2022055336A1 publication Critical patent/WO2022055336A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • 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 embodiments propose a method and apparatus for transmitting and receiving data using a plurality of cells in a next-generation radio access network (hereinafter, referred to as “New Radio [NR]”).
  • NR next-generation radio access network
  • NR New Radio
  • eMBB enhanced Mobile BroadBand
  • mMTC massive machine type communication
  • URLLC Ultra Reliable and Low Latency Communications
  • each service requirement (usage scenario) has different requirements for data rates, latency, reliability, coverage, etc., through the frequency band constituting an arbitrary NR system
  • different numerology eg, subcarrier spacing, subframe, TTI (Transmission Time Interval), etc.
  • CA carrier aggregation
  • DC dual connectivity
  • Embodiments of the present disclosure may provide a method and apparatus for data transmission/reception using a plurality of cells capable of performing scheduling for a primary cell or a primary secondary cell through a secondary cell when a plurality of cells are used. .
  • the present embodiments provide a method for a terminal to transmit and receive data using a plurality of cells, the step of receiving cross-carrier scheduling related information for at least two or more cells, at least two or more cells Among them, a method comprising receiving scheduling information for a primary cell (PCell) or a primary secondary cell (PSCell) from a secondary cell (SCell) and transmitting and receiving data based on the scheduling information may be provided.
  • PCell primary cell
  • PSCell primary secondary cell
  • SCell secondary cell
  • the present embodiments provide a method for a base station to control data transmission and reception using a plurality of cells, the step of transmitting cross-carrier scheduling related information for at least two or more cells, at least two or more cells Among them, a method comprising the steps of transmitting scheduling information for a primary cell (PCell) or a primary secondary cell (PSCell) through a secondary cell (SCell) and transmitting and receiving data based on the scheduling information can be provided.
  • PCell primary cell
  • PSCell primary secondary cell
  • SCell secondary cell
  • a transmitter receives cross-carrier scheduling related information for at least two or more cells, and at least two or more cells Among them, a control unit for receiving scheduling information for a primary cell (PCell) or a primary secondary cell (PSCell) from a secondary cell (SCell) and a control unit for transmitting and receiving data based on the scheduling information by controlling the transmitting unit and receiving unit A terminal may be provided.
  • PCell primary cell
  • PSCell primary secondary cell
  • SCell secondary cell
  • a receiver transmits cross-carrier scheduling related information for at least two or more cells, and at least two or more cells Among them, a transmission unit for transmitting scheduling information for a primary cell (PCell) or a primary secondary cell (PSCell) through a secondary cell (SCell), and a control unit for controlling the transmission unit and the reception unit, including a control unit for transmitting and receiving data based on the scheduling information
  • PCell primary cell
  • PSCell primary secondary cell
  • SCell secondary cell
  • a control unit for controlling the transmission unit and the reception unit including a control unit for transmitting and receiving data based on the scheduling information
  • scheduling of the primary cell or the primary secondary cell is configured to be performed through the secondary cell, thereby enabling more efficient data transmission and reception. It is possible to provide a method and apparatus for transmitting and receiving data using the same.
  • FIG. 1 is a diagram schematically illustrating a structure of an NR wireless communication system to which this embodiment can be applied.
  • FIG. 2 is a diagram for explaining a frame structure in an NR system to which this embodiment can be applied.
  • FIG 3 is a diagram for explaining a resource grid supported by a radio access technology to which this embodiment can be applied.
  • FIG. 4 is a diagram for explaining a bandwidth part supported by a radio access technology to which the present embodiment can be applied.
  • FIG. 5 is a diagram exemplarily illustrating a synchronization signal block in a radio access technology to which the present embodiment can be applied.
  • FIG. 6 is a diagram for explaining a random access procedure in a radio access technology to which this embodiment can be applied.
  • FIG 8 is a diagram illustrating an example of symbol level alignment among different SCSs in different SCSs to which this embodiment can be applied.
  • FIG. 9 is a diagram illustrating a conceptual example of a bandwidth part to which the present embodiment can be applied.
  • FIG. 10 is a diagram illustrating a procedure in which a terminal performs data transmission/reception using a plurality of cells according to an embodiment.
  • FIG. 11 is a diagram illustrating a procedure in which a base station controls data transmission/reception using a plurality of cells according to an embodiment.
  • 12 to 14 are diagrams for explaining cross-carrier scheduling related information according to an embodiment.
  • 15 is a diagram showing the configuration of a user terminal according to another embodiment.
  • 16 is a diagram showing the configuration of a base station according to another embodiment.
  • temporal precedence relationship such as “after”, “after”, “after”, “before”, etc.
  • a flow precedence relationship when a flow precedence relationship is described, it may include a case where it is not continuous unless “immediately” or "directly” is used.
  • a wireless communication system in the present specification refers to a system for providing various communication services such as voice and data packets using radio resources, and may include a terminal, a base station, or a core network.
  • the present embodiments disclosed below may be applied to a wireless communication system using various wireless access technologies.
  • the present embodiments are CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), SC-FDMA (single carrier frequency division multiple access)
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • the wireless access technology may mean not only a specific access technology, but also a communication technology for each generation established by various communication consultation organizations such as 3GPP, 3GPP2, WiFi, Bluetooth, IEEE, and ITU.
  • CDMA may be implemented with a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000.
  • UTRA universal terrestrial radio access
  • CDMA2000 Code Division Multiple Access 2000
  • TDMA may be implemented with a radio technology such as global system for mobile communications (GSM)/general packet radio service (GPRS)/enhanced datarates for GSM evolution (EDGE).
  • OFDMA may be implemented with a radio technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and evolved UTRA (E-UTRA).
  • IEEE 802.16m is an evolution of IEEE 802.16e, and provides backward compatibility with a system based on IEEE 802.16e.
  • UTRA is part of the universal mobile telecommunications system (UMTS).
  • 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) that uses evolved-UMTSterrestrial radio access (E-UTRA), and employs OFDMA in the downlink and SC- FDMA is employed.
  • 3GPP 3rd generation partnership project
  • LTE long term evolution
  • E-UMTS evolved UMTS
  • E-UTRA evolved-UMTSterrestrial radio access
  • OFDMA OFDMA in the downlink
  • SC- FDMA SC-FDMA
  • the terminal in the present specification is a comprehensive concept meaning a device including a wireless communication module that performs communication with a base station in a wireless communication system, WCDMA, LTE, NR, HSPA and IMT-2020 (5G or New Radio), etc. It should be interpreted as a concept including all of UE (User Equipment), MS (Mobile Station), UT (User Terminal), SS (Subscriber Station), wireless device, etc. in GSM.
  • the terminal may be a user's portable device such as a smart phone depending on the type of use, and in a V2X communication system may mean a vehicle, a device including a wireless communication module in the vehicle, and the like.
  • a machine type communication (Machine Type Communication) system, it may mean an MTC terminal, an M2M terminal, a URLLC terminal, etc. equipped with a communication module to perform machine type communication.
  • a base station or cell of the present specification refers to an end that communicates with a terminal in terms of a network, a Node-B (Node-B), an evolved Node-B (eNB), gNode-B (gNB), a Low Power Node (LPN), Sector, site, various types of antennas, base transceiver system (BTS), access point, point (eg, transmission point, reception point, transmission/reception point), relay node ), mega cell, macro cell, micro cell, pico cell, femto cell, RRH (Remote Radio Head), RU (Radio Unit), small cell (small cell), such as a variety of coverage areas.
  • the cell may mean including a BWP (Bandwidth Part) in the frequency domain.
  • the serving cell may mean the Activation BWP of the UE.
  • the base station can be interpreted in two meanings. 1) in relation to the radio area, it may be the device itself providing a mega cell, a macro cell, a micro cell, a pico cell, a femto cell, or a small cell, or 2) may indicate the radio area itself.
  • the devices providing a predetermined radio area are controlled by the same entity, or all devices interacting to form a radio area cooperatively are directed to the base station.
  • a point, a transmission/reception point, a transmission point, a reception point, etc. become an embodiment of a base station according to a configuration method of a wireless area.
  • the radio area itself in which signals are received or transmitted from the point of view of the user terminal or the neighboring base station may be indicated to the base station.
  • a cell is a component carrier having the coverage of a signal transmitted from a transmission/reception point or a signal transmitted from a transmission/reception point (transmission point or transmission/reception point), and the transmission/reception point itself.
  • the uplink (Uplink, UL, or uplink) refers to a method of transmitting and receiving data by the terminal to the base station
  • the downlink (Downlink, DL, or downlink) refers to a method of transmitting and receiving data to the terminal by the base station do.
  • Downlink may mean a communication or communication path from a multi-transmission/reception point to a terminal
  • uplink may mean a communication or communication path from a terminal to a multi-transmission/reception point.
  • the transmitter in the downlink, the transmitter may be a part of multiple transmission/reception points, and the receiver may be a part of the terminal.
  • the transmitter in the uplink, the transmitter may be a part of the terminal, and the receiver may be a part of the multi-transmission/reception point.
  • the uplink and the downlink transmit and receive control information through a control channel such as a Physical Downlink Control CHannel (PDCCH) and a Physical Uplink Control CHannel (PUCCH), and a Physical Downlink Shared CHannel (PDSCH), a Physical Uplink Shared CHannel (PUSCH), etc.
  • a control channel such as a Physical Downlink Control CHannel (PDCCH) and a Physical Uplink Control CHannel (PUCCH), and a Physical Downlink Shared CHannel (PDSCH), a Physical Uplink Shared CHannel (PUSCH), etc.
  • Data is transmitted and received by configuring the same data channel.
  • a situation in which signals are transmitted/received through channels such as PUCCH, PUSCH, PDCCH, and PDSCH may be expressed in the form of 'transmitting and receiving PUCCH, PUSCH, PDCCH and PDSCH'.
  • 5G (5th-Generation) communication technology is developed to meet the requirements of ITU-R's next-generation wireless access technology.
  • 3GPP develops LTE-A pro, which improved LTE-Advanced technology to meet the requirements of ITU-R as a 5G communication technology, and a new NR communication technology separate from 4G communication technology.
  • LTE-A pro and NR both refer to 5G communication technology.
  • 5G communication technology will be described focusing on NR unless a specific communication technology is specified.
  • NR operation scenario various operation scenarios were defined by adding consideration to satellites, automobiles, and new verticals from the existing 4G LTE scenarios. It is deployed in a range and supports the mMTC (Massive Machine Communication) scenario that requires a low data rate and asynchronous connection, and the URLLC (Ultra Reliability and Low Latency) scenario that requires high responsiveness and reliability and supports high-speed mobility. .
  • mMTC Massive Machine Communication
  • URLLC Ultra Reliability and Low Latency
  • NR discloses a wireless communication system to which a new waveform and frame structure technology, low latency technology, mmWave support technology, and forward compatible technology are applied.
  • various technological changes are presented in terms of flexibility in order to provide forward compatibility. The main technical features of NR will be described with reference to the drawings below.
  • FIG. 1 is a diagram schematically illustrating a structure of an NR system to which this embodiment can be applied.
  • the NR system is divided into a 5G Core Network (5GC) and an NR-RAN part, and the NG-RAN controls the user plane (SDAP/PDCP/RLC/MAC/PHY) and UE (User Equipment) It consists of gNBs and ng-eNBs that provide planar (RRC) protocol termination.
  • gNB and ng-eNB are each connected to 5GC through the NG interface.
  • 5GC may be configured to include an Access and Mobility Management Function (AMF) in charge of a control plane such as terminal access and mobility control functions, and a User Plane Function (UPF) in charge of a control function for user data.
  • AMF Access and Mobility Management Function
  • UPF User Plane Function
  • NR includes support for both the frequency band below 6 GHz (FR1, Frequency Range 1) and the frequency band above 6 GHz (FR2, Frequency Range 2).
  • gNB means a base station that provides NR user plane and control plane protocol termination to a terminal
  • ng-eNB means a base station that provides E-UTRA user plane and control plane protocol termination to a terminal.
  • the base station described in this specification should be understood as encompassing gNB and ng-eNB, and may be used as a meaning to refer to gNB or ng-eNB separately if necessary.
  • a CP-OFDM waveform using a cyclic prefix is used for downlink transmission, and CP-OFDM or DFT-s-OFDM is used for uplink transmission.
  • OFDM technology is easy to combine with MIMO (Multiple Input Multiple Output), and has advantages of using a low-complexity receiver with high frequency efficiency.
  • NR transmission numerology is determined based on sub-carrier spacing and cyclic prefix (CP), and the ⁇ value is used as an exponential value of 2 based on 15 kHz as shown in Table 1 below. is changed negatively.
  • the NR numerology can be divided into five types according to the subcarrier spacing. This is different from the fact that the subcarrier interval of LTE, one of the 4G communication technologies, is fixed to 15 kHz. Specifically, in NR, subcarrier intervals used for data transmission are 15, 30, 60, and 120 kHz, and subcarrier intervals used for synchronization signal transmission are 15, 30, 12, 240 kHz. In addition, the extended CP is applied only to the 60 kHz subcarrier interval. On the other hand, as for the frame structure in NR, a frame having a length of 10 ms is defined, which is composed of 10 subframes having the same length of 1 ms.
  • One frame can be divided into half frames of 5 ms, and each half frame includes 5 subframes.
  • one subframe consists of one slot
  • each slot consists of 14 OFDM symbols.
  • 2 is a diagram for explaining a frame structure in an NR system to which this embodiment can be applied.
  • a slot is fixedly composed of 14 OFDM symbols in the case of a normal CP, but the length of the slot in the time domain may vary according to the subcarrier interval.
  • the slot is 1 ms long and is configured with the same length as the subframe.
  • a slot consists of 14 OFDM symbols, but two slots may be included in one subframe with a length of 0.5 ms. That is, the subframe and the frame are defined to have a fixed time length, and the slot is defined by the number of symbols, so that the time length may vary according to the subcarrier interval.
  • NR defines a basic unit of scheduling as a slot, and also introduces a mini-slot (or a sub-slot or a non-slot based schedule) in order to reduce transmission delay in a radio section.
  • a mini-slot or a sub-slot or a non-slot based schedule
  • the mini-slot is for efficient support of the URLLC scenario and can be scheduled in units of 2, 4, or 7 symbols.
  • NR defines uplink and downlink resource allocation at a symbol level within one slot.
  • a slot structure capable of transmitting HARQ ACK/NACK directly within a transmission slot has been defined, and this slot structure will be described as a self-contained structure.
  • NR is designed to support a total of 256 slot formats, of which 62 slot formats are used in 3GPP Rel-15.
  • a common frame structure constituting an FDD or TDD frame is supported through a combination of various slots.
  • a slot structure in which all symbols of a slot are set to downlink a slot structure in which all symbols are set to uplink
  • a slot structure in which downlink symbols and uplink symbols are combined are supported.
  • NR supports that data transmission is scheduled to be distributed in one or more slots.
  • the base station may inform the terminal whether the slot is a downlink slot, an uplink slot, or a flexible slot using a slot format indicator (SFI).
  • the base station may indicate the slot format by indicating the index of the table configured through UE-specific RRC signaling using SFI, and may indicate dynamically through DCI (Downlink Control Information) or statically or through RRC. It can also be ordered quasi-statically.
  • an antenna port In relation to a physical resource in NR, an antenna port, a resource grid, a resource element, a resource block, a bandwidth part, etc. are considered do.
  • An antenna port is defined such that a channel on which a symbol on an antenna port is carried can be inferred from a channel on which another symbol on the same antenna port is carried.
  • the two antenna ports are QC/QCL (quasi co-located or QC/QCL) It can be said that there is a quasi co-location) relationship.
  • the wide range characteristic includes one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.
  • FIG 3 is a diagram for explaining a resource grid supported by a radio access technology to which this embodiment can be applied.
  • a resource grid may exist according to each numerology.
  • the resource grid may exist according to an antenna port, a subcarrier interval, and a transmission direction.
  • a resource block consists of 12 subcarriers, and is defined only in the frequency domain.
  • a resource element is composed of one OFDM symbol and one subcarrier. Accordingly, as in FIG. 3 , the size of one resource block may vary according to the subcarrier interval.
  • NR defines "Point A" serving as a common reference point for a resource block grid, a common resource block, a virtual resource block, and the like.
  • FIG. 4 is a diagram for explaining a bandwidth part supported by a radio access technology to which the present embodiment can be applied.
  • a bandwidth part may be designated within the carrier bandwidth and used by the terminal.
  • the bandwidth part is associated with one numerology and is composed of a subset of continuous common resource blocks, and may be dynamically activated according to time.
  • a maximum of four bandwidth parts are configured in the terminal, respectively, in uplink and downlink, and data is transmitted/received using the activated bandwidth part at a given time.
  • the uplink and downlink bandwidth parts are set independently, and in the case of an unpaired spectrum, to prevent unnecessary frequency re-tunning between downlink and uplink operations
  • the downlink and uplink bandwidth parts are set in pairs to share a center frequency.
  • the terminal accesses the base station and performs a cell search and random access procedure in order to perform communication.
  • Cell search is a procedure in which the terminal synchronizes with the cell of the corresponding base station using a synchronization signal block (SSB) transmitted by the base station, obtains a physical layer cell ID, and obtains system information.
  • SSB synchronization signal block
  • FIG. 5 is a diagram exemplarily illustrating a synchronization signal block in a radio access technology to which the present embodiment can be applied.
  • the SSB consists of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) occupying 1 symbol and 127 subcarriers, respectively, and a PBCH spanning 3 OFDM symbols and 240 subcarriers.
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • the UE receives the SSB by monitoring the SSB in the time and frequency domains.
  • SSB can be transmitted up to 64 times in 5ms.
  • a plurality of SSBs are transmitted using different transmission beams within 5 ms, and the UE performs detection on the assumption that SSBs are transmitted every 20 ms when viewed based on one specific beam used for transmission.
  • the number of beams that can be used for SSB transmission within 5 ms time may increase as the frequency band increases.
  • up to 4 SSB beams can be transmitted in 3 GHz or less, and SSB can be transmitted using up to 8 different beams in a frequency band of 3 to 6 GHz and up to 64 different beams in a frequency band of 6 GHz or more.
  • Two SSBs are included in one slot, and the start symbol and the number of repetitions within the slot are determined according to the subcarrier interval as follows.
  • the SSB is not transmitted at the center frequency of the carrier bandwidth, unlike the SS of the conventional LTE. That is, the SSB may be transmitted in a place other than the center of the system band, and a plurality of SSBs may be transmitted in the frequency domain when wideband operation is supported. Accordingly, the UE monitors the SSB using a synchronization raster that is a candidate frequency location for monitoring the SSB.
  • the carrier raster and synchronization raster which are the center frequency location information of the channel for initial access, are newly defined in NR. Compared to the carrier raster, the synchronization raster has a wider frequency interval than that of the carrier raster. can
  • the UE may acquire the MIB through the PBCH of the SSB.
  • MIB Master Information Block
  • MIB includes minimum information for the terminal to receive the remaining system information (RMSI, Remaining Minimum System Information) broadcast by the network.
  • the PBCH includes information on the position of the first DM-RS symbol in the time domain, information for the UE to monitor SIB1 (eg, SIB1 neurology information, information related to SIB1 CORESET, search space information, PDCCH related parameter information, etc.), offset information between the common resource block and the SSB (the position of the absolute SSB in the carrier is transmitted through SIB1), and the like.
  • the SIB1 neurology information is equally applied to some messages used in the random access procedure for accessing the base station after the UE completes the cell search procedure.
  • the neurology information of SIB1 may be applied to at least one of messages 1 to 4 for the random access procedure.
  • the aforementioned RMSI may mean System Information Block 1 (SIB1), and SIB1 is periodically broadcast (eg, 160 ms) in the cell.
  • SIB1 includes information necessary for the UE to perform an initial random access procedure, and is periodically transmitted through the PDSCH.
  • CORESET Control Resource Set
  • the UE checks scheduling information for SIB1 by using SI-RNTI in CORESET, and acquires SIB1 on PDSCH according to the scheduling information.
  • SIBs other than SIB1 may be transmitted periodically or may be transmitted according to the request of the terminal.
  • FIG. 6 is a diagram for explaining a random access procedure in a radio access technology to which this embodiment can be applied.
  • the terminal transmits a random access preamble for random access to the base station.
  • the random access preamble is transmitted through the PRACH.
  • the random access preamble is transmitted to the base station through a PRACH consisting of continuous radio resources in a specific slot that is periodically repeated.
  • a contention-based random access procedure is performed, and when random access is performed for beam failure recovery (BFR), a contention-free random access procedure is performed.
  • BFR beam failure recovery
  • the terminal receives a random access response to the transmitted random access preamble.
  • the random access response may include a random access preamble identifier (ID), a UL grant (uplink radio resource), a temporary C-RNTI (Temporary Cell - Radio Network Temporary Identifier), and a Time Alignment Command (TAC). Since one random access response may include random access response information for one or more UEs, the random access preamble identifier may be included to inform which UE the included UL Grant, temporary C-RNTI, and TAC are valid.
  • the random access preamble identifier may be an identifier for the random access preamble received by the base station.
  • the TAC may be included as information for the UE to adjust uplink synchronization.
  • the random access response may be indicated by a random access identifier on the PDCCH, that is, RA-RNTI (Random Access - Radio Network Temporary Identifier).
  • the terminal Upon receiving the valid random access response, the terminal processes information included in the random access response and performs scheduled transmission to the base station. For example, the UE applies the TAC and stores the temporary C-RNTI. In addition, data stored in the buffer of the terminal or newly generated data is transmitted to the base station by using the UL grant. In this case, information for identifying the terminal should be included.
  • the terminal receives a downlink message for contention resolution.
  • the downlink control channel in NR is transmitted in a CORESET (Control Resource Set) having a length of 1 to 3 symbols, and transmits uplink/downlink scheduling information, SFI (Slot Format Index), and TPC (Transmit Power Control) information. .
  • CORESET Control Resource Set
  • SFI Slot Format Index
  • TPC Transmit Power Control
  • CORESET Control Resource Set
  • the UE may decode the control channel candidates by using one or more search spaces in the CORESET time-frequency resource.
  • QCL Quasi CoLocation
  • CORESET may exist in various forms within a carrier bandwidth within one slot, and CORESET may consist of up to three OFDM symbols in the time domain.
  • CORESET is defined as a multiple of 6 resource blocks up to the carrier bandwidth in the frequency domain.
  • the first CORESET is indicated through the MIB as part of the initial bandwidth part configuration to receive additional configuration information and system information from the network.
  • the terminal may receive and configure one or more pieces of CORESET information through RRC signaling.
  • frequencies, frames, subframes, resources, resource blocks, regions, bands, subbands, control channels, data channels, synchronization signals, various reference signals, various signals or various messages related to NR can be interpreted in various meanings used in the past or present or used in the future.
  • the present disclosure is not only applied to 5G or NR technology, which is a next-generation wireless communication technology, but also may be substantially equally applied to various wireless communication technologies, such as 4G and Wifi, as long as it does not contradict the technical idea.
  • NR conducted in 3GPP was designed to satisfy various QoS requirements required for each segmented and detailed service requirement (usage scenario) as well as an improved data rate compared to LTE.
  • eMBB enhanced Mobile BroadBand
  • mMTC massive machine type communication
  • URLLC Ultra Reliable and Low Latency Communications
  • Frequency constituting an arbitrary NR system because each service requirement (usage scenario) has different requirements for data rates, latency, reliability, coverage, etc.
  • a radio resource unit based on different numerology eg, subcarrier spacing, subframe, TTI, etc.
  • numerology eg, subcarrier spacing, subframe, TTI, etc.
  • TDM, FDM or TDM/FDM-based through one or a plurality of NR component carriers (s) for numerology with different subcarrier spacing values Discussion was made on a method of supporting by multiplexing to and supporting one or more time units in configuring a scheduling unit in a time domain.
  • a subframe is defined as a type of time domain structure, and reference numerology for defining the subframe duration is used. As such, it was decided to define a single subframe duration composed of 14 OFDM symbols of the same 15 kHz Sub-Carrier Spacing (SCS)-based normal CP overhead as LTE. Accordingly, in NR, a subframe has a duration of 1 ms.
  • SCS Sub-Carrier Spacing
  • a subframe of NR is an absolute reference time duration, and a slot and a mini-slot as a time unit that is the basis of actual uplink/downlink data scheduling. ) can be defined.
  • any slot consists of 14 symbols, and according to the transmission direction of the slot, all symbols are used for downlink transmission (DL transmission), or all symbols are used for uplink transmission (UL). transmission), or may be used in the form of a downlink portion (DL portion) + a gap + an uplink portion (UL portion).
  • a mini-slot composed of a smaller number of symbols than the slot is defined in an arbitrary numerology (or SCS), and based on this, a short time domain scheduling interval for uplink/downlink data transmission/reception (time-domain) is defined. scheduling interval) may be set, or a long time-domain scheduling interval for uplink/downlink data transmission/reception may be configured through slot aggregation.
  • a mini-slot composed of fewer OFDM symbols than the corresponding slot is defined, and based on this, it is critical to the same latency as the URLLC. It can be defined so that scheduling of (latency critical) data is performed.
  • each numerology A method of scheduling data according to a latency requirement based on a defined slot (or mini-slot) length is also being considered. For example, when the SCS is 60 kHz as shown in FIG. 8 below, since the symbol length is reduced by about 1/4 compared to the case of SCS 15 kHz, if one slot is configured with 14 OFDM symbols, the corresponding 15 kHz-based The slot length becomes 1 ms, whereas the slot length based on 60 kHz is reduced to about 0.25 ms.
  • a scalable bandwidth operation for an arbitrary LTE CC (Component Carrier) was supported. That is, according to a frequency distribution scenario (deployment scenario), any LTE operator was able to configure a bandwidth of at least 1.4 MHz to a maximum of 20 MHz in configuring one LTE CC, and a normal LTE terminal is one LTE For CC, the transmit/receive capability of 20 MHz bandwidth was supported.
  • bandwidth part bandwidth part(s)
  • BWP bandwidth part(s)
  • activation activation
  • one or more bandwidth parts may be configured through one serving cell configured from the viewpoint of the terminal, and the terminal may configure one downlink bandwidth part in the corresponding serving cell (serving cell).
  • DL bandwidth part) and one uplink bandwidth part (UL bandwidth part) were activated and defined to be used for uplink/downlink data transmission/reception.
  • UL bandwidth part uplink bandwidth part
  • a plurality of serving cells are configured in the corresponding terminal, that is, one downlink bandwidth part and/or uplink bandwidth part is activated for each serving cell even for a terminal to which CA is applied.
  • it is defined to be used for uplink/downlink data transmission/reception by using the radio resource of the corresponding serving cell.
  • an initial bandwidth part for an initial access procedure of a terminal is defined in an arbitrary serving cell, and one or more terminal specific (UE) through dedicated RRC signaling for each terminal -specific)
  • a bandwidth part(s) is configured, and a default bandwidth part for a fallback operation may be defined for each terminal.
  • a plurality of downlink and/or uplink bandwidth parts are activated and used at the same time according to the configuration of the terminal's capability and bandwidth part(s) in an arbitrary serving cell.
  • NR rel-15 it is defined to activate and use only one downlink bandwidth part (DL bandwidth part) and an uplink bandwidth part (UL bandwidth part) at any time in any terminal. .
  • CA Carrier Aggregation
  • a carrier aggregation (CA) technology is a technology for boosting a data rate for a terminal through an additional cell.
  • CA carrier aggregation
  • an RRC connection is configured to a terminal
  • a cell that is a reference for handover is set as a primary cell (PCell)
  • a cell that transmits and receives data by additionally allocating radio resources to the terminal is a secondary cell (SCell).
  • SCell secondary cell
  • the base station configures the secondary cell in the terminal, the secondary cell state is determined in consideration of the measurement report information of the terminal after the secondary cell is configured in an inactive state.
  • the configuration procedure for configuring the secondary cell and the operation for controlling the secondary cell state of the configured secondary cell are separated, and there is a time delay.
  • the state of the secondary cell may be divided into activation or deactivation, but the setting of the state may be made other than activation and deactivation. That is, the state of the secondary cell is described based on the case of being divided into activation and deactivation, but is not limited thereto, and when the additional state is determined according to the state setting of the base station or the terminal, the secondary cell state including the additional state can be determined.
  • Dual connectivity refers to an operation in which an RRC-connected (RRC_CONNECTED) terminal uses radio resources provided by at least two different network points (eg, Master eNB and Secondary eNBs) connected by non-ideal backhaul.
  • the master base station (Master eNB) refers to a base station that terminates S1-MME and acts as a mobility anchor toward the core network (CN).
  • a Master eNB may be referred to as a master base station or MeNB or a Macro eNB or a macrocell eNB.
  • a secondary eNB is a base station that provides additional radio resources for a terminal and refers to a base station other than the master eNB.
  • Secondary eNB may be referred to as a secondary base station or SeNB or small cell eNB or Small eNB or Assisting eNB.
  • the group of serving cells associated with the MeNB is referred to as a Master Cell Group (MCG)
  • MCG Master Cell Group
  • SCG Secondary Cell Group
  • the associated serving cells may mean serving cells provided by the corresponding base station.
  • the SeNB has one special cell containing at least PUCCH. That is, at least one serving cell associated with the SeNB has a configured uplink. And one of them is configured with a PUCCH resource.
  • some resources of some LTE DL subframes in LTE frequency band are used for PDCCH, PDSCH and DM RS transmission of NR, and some resources of LTE UL subframe are used for NR PUSCH, PUCCH and DM RS transmission
  • PDCCH Physical Downlink Control Channel
  • an NR cell configured in a high frequency band small for data boosting may be suitable for the cell.
  • an NR cell configured based on DSS in an LTE band is a primary cell (PCell), and an NR cell configured in an NR frequency band is a secondary cell (SCell).
  • PCell primary cell
  • SCell secondary cell
  • the PCell supporting only self-scheduling can coexist with LTE ( coexistence), the capacity of the PDCCH may be insufficient. Accordingly, it is necessary to support scheduling of the data channel of the PCell through the SCell.
  • CA carrier aggregation
  • SCG secondary cell group
  • FIG. 10 is a diagram illustrating a procedure in which a terminal performs data transmission/reception using a plurality of cells according to an embodiment.
  • the terminal may receive cross-carrier scheduling related information for at least two cells ( S1000 ).
  • CA carrier aggregation
  • DC dual connectivity
  • the primary cell of the primary cell (PCell) in the carrier merging or the primary cell of the master cell group (MCG) in the double connection and the secondary cell group (Secondary Cell Group; SCG) of the primary secondary cell (PSCell) ) may be configured based on DSS in a radio access technology in which subcarrier spacing is set to a single value of 15 kHz, that is, in the frequency band of LTE.
  • at least one of the secondary cells (SCell) may be configured in a radio access technology in which subcarrier spacing is set to one of at least two or more candidate values, that is, in a frequency band of NR.
  • cross-carrier scheduling in which a primary cell configured in an LTE frequency band or a primary secondary cell configured in an NR frequency band is scheduled by a secondary cell configured in an NR frequency band may be configured.
  • a primary cell or a primary secondary cell is configured in an LTE frequency band
  • a secondary cell is configured in an NR frequency band to schedule a primary cell or a primary secondary cell. means cell.
  • this is an example, and the technical spirit of the present disclosure may be applied regardless of a frequency band in which cells are configured to the extent that they do not contradict each other.
  • the cross-carrier scheduling related information for at least two or more cells may include information that the primary cell or the primary secondary cell may be scheduled by the secondary cell. That is, when a serving cell configured in the terminal is a primary cell or a primary secondary cell, the cross-carrier scheduling related information may include cross-carrier scheduling configuration information.
  • the scheduling cell information included in the cross-carrier scheduling configuration information may include information that can be scheduled by another cell with respect to the primary cell or the primary secondary cell. That is, the corresponding scheduling cell information may be set to an 'other' value indicating cross-carrier scheduling scheduled by the PDCCH of another cell instead of an 'own' value indicating self-scheduling. Accordingly, a scheduling cell ID and a carrier indicator field (CIF) value indicating a primary cell or a secondary cell scheduled for the primary secondary cell may be included in the cross-carrier scheduling configuration information.
  • CIF carrier indicator field
  • the cross-carrier scheduling related information may include information that scheduling can be performed on a primary cell or a primary secondary cell with respect to the secondary cell. That is, for the primary cell or the secondary cell scheduling the primary secondary cell, separate cross-carrier scheduling configuration information is set for the cross-carrier scheduling related information, or a separate information area can be added to the cross-carrier scheduling configuration information. there is.
  • the scheduling cell information is set to 'own' in the cross-carrier scheduling configuration information for the secondary cell
  • the 'CIF-presence' information area indicating whether CIF is included in the DCI format of the cell
  • a 'pif-presence-r17' information region indicating whether a PCell/PSCell Indicator Field (PIF) for indicating a primary cell or a primary secondary cell is included may be further included.
  • the cross-carrier scheduling related information may include information indicating a primary cell or a secondary cell performing scheduling on the primary secondary cell among at least two or more cells.
  • the cross-carrier scheduling related information may include a separate RRC message for configuring the primary cell or the secondary cell scheduling the primary secondary cell.
  • any secondary cell may be configured as a PS-SCell through UE-specific RRC signaling.
  • cross-carrier scheduling whether it is possible to configure cross-carrier scheduling for the primary cell or the primary secondary cell from the secondary cell is explicitly indicated through cell-specific or UE-specific RRC signaling, or the configuration of the PBCH etc. may be implicitly indicated.
  • whether cross-carrier scheduling for the primary cell or the primary secondary cell is configured may be explicitly transmitted to the UE through cell-specific or UE-specific RRC signaling in the corresponding cell.
  • information indicating that cross-carrier scheduling is possible even when the corresponding cell is a primary cell or a primary secondary cell may be transmitted through a Master Information Block (MIB) or a System Information Block (SIB).
  • MIB Master Information Block
  • SIB System Information Block
  • whether to configure cross-carrier scheduling for the primary cell or the primary secondary cell may be implicitly indicated to the UE in the corresponding cell. For example, based on the location or sequence of the DMRS of the PBCH, it may be possible to inform whether the corresponding cross-carrier scheduling can be set. Alternatively, based on the release information of the base station, for example, for an NR serving cell configured through a rel-17 or higher base station, it may be implicitly indicated that cross-carrier scheduling for a primary cell or a primary secondary cell is supported. .
  • cross-carrier scheduling for the primary cell or the primary secondary cell can be determined. there is.
  • the UE receives scheduling information for a primary cell (PCell) or a primary secondary cell (PSCell) from a secondary cell (SCell) among at least two or more cells (S1010), and the received scheduling information Data may be transmitted/received based on (S1020).
  • PCell primary cell
  • PSCell primary secondary cell
  • SCell secondary cell
  • an arbitrary secondary cell is configured as a scheduling cell for a primary cell or a primary secondary cell
  • data transmission/reception through the primary cell or the primary secondary cell through DCI transmitted through the PDCCH in the secondary cell This can be scheduled.
  • the cross-carrier scheduling related information includes information that can be scheduled by the secondary cell with respect to the primary cell or the primary secondary cell
  • the CIF information area included in the DCI format transmitted from the secondary cell Through scheduling control information for a primary cell or a primary secondary cell may be transmitted.
  • the DCI format transmitted from the secondary cell includes PIF information It may further include a region. That is, when the DCI format transmitted from the secondary cell includes the PIF information region indicating the primary cell or the primary secondary cell, the DCI format may be scheduling control information for the primary cell or the primary secondary cell.
  • a search space set consisting of PDCCH candidates for transmitting the corresponding DCI format is composed of PDCCH candidates for transmitting the scheduling DCI format for the corresponding secondary cell. It can be set the same as the search space set.
  • the DCI format transmitted from the secondary cell includes a primary cell or A CIF or PIF information region indicating a primary secondary cell may be included.
  • the corresponding DCI format may indicate the primary cell or the primary secondary cell based on the existing CIF or based on a separate PIF.
  • a separate PIF is included in the corresponding DCI format
  • a separate CIF information area may not be included.
  • a separate search space for transmitting the DCI format for the primary cell or the primary secondary cell may be set.
  • the UE may transmit/receive data through the primary cell or the primary secondary cell based on the scheduling information received from the secondary cell.
  • a method for transmitting and receiving data using a plurality of cells that enables more efficient data transmission and reception by configuring a primary cell or a primary secondary cell to perform scheduling through the secondary cell in the case of using a plurality of cells and devices may be provided.
  • FIG. 11 is a diagram illustrating a procedure in which a base station controls data transmission/reception using a plurality of cells according to an embodiment.
  • the base station may transmit cross-carrier scheduling related information for at least two or more cells ( S1100 ).
  • MCG master cell group
  • SCG secondary Cell Group
  • at least one of the secondary cells (SCell) may be configured in a radio access technology in which subcarrier spacing is set to one of at least two or more candidate values, that is, in a frequency band of NR.
  • cross-carrier scheduling in which a primary cell configured in an LTE frequency band or a primary secondary cell configured in an NR frequency band is scheduled by a secondary cell configured in an NR frequency band may be configured.
  • the cross-carrier scheduling related information for at least two or more cells may include information that the primary cell or the primary secondary cell may be scheduled by the secondary cell. That is, when a serving cell configured in the terminal is a primary cell or a primary secondary cell, the cross-carrier scheduling related information may include cross-carrier scheduling configuration information.
  • the scheduling cell information included in the cross-carrier scheduling configuration information may include information that can be scheduled by another cell with respect to the primary cell or the primary secondary cell. That is, the corresponding scheduling cell information may be set to an 'other' value indicating cross-carrier scheduling scheduled by the PDCCH of another cell instead of an 'own' value indicating self-scheduling. Accordingly, a scheduling cell ID and a carrier indicator field (CIF) value indicating a primary cell or a secondary cell scheduled for the primary secondary cell may be included in the cross-carrier scheduling configuration information.
  • CIF carrier indicator field
  • the cross-carrier scheduling related information may include information that scheduling can be performed on a primary cell or a primary secondary cell with respect to the secondary cell. That is, for the primary cell or the secondary cell scheduling the primary secondary cell, separate cross-carrier scheduling configuration information is set for the cross-carrier scheduling related information, or a separate information area can be added to the cross-carrier scheduling configuration information. there is.
  • the scheduling cell information is set to 'own' in the cross-carrier scheduling configuration information for the secondary cell
  • the 'CIF-presence' information area indicating whether CIF is included in the DCI format of the cell
  • a 'pif-presence-r17' information region indicating whether a PCell/PSCell Indicator Field (PIF) for indicating a primary cell or a primary secondary cell is included may be further included.
  • the cross-carrier scheduling related information may include information indicating a primary cell or a secondary cell performing scheduling on the primary secondary cell among at least two or more cells.
  • the cross-carrier scheduling related information may include a separate RRC message for configuring the primary cell or the secondary cell scheduling the primary secondary cell.
  • any secondary cell may be configured as a PS-SCell through UE-specific RRC signaling.
  • cross-carrier scheduling whether it is possible to configure cross-carrier scheduling for the primary cell or the primary secondary cell from the secondary cell is explicitly indicated through cell-specific or UE-specific RRC signaling, or the configuration of the PBCH etc. may be implicitly indicated.
  • whether cross-carrier scheduling for the primary cell or the primary secondary cell is configured may be explicitly transmitted to the UE through cell-specific or UE-specific RRC signaling in the corresponding cell.
  • information indicating that cross-carrier scheduling is possible even when the corresponding cell is a primary cell or a primary secondary cell may be transmitted through a Master Information Block (MIB) or a System Information Block (SIB).
  • MIB Master Information Block
  • SIB System Information Block
  • whether to configure cross-carrier scheduling for the primary cell or the primary secondary cell may be implicitly indicated to the UE in the corresponding cell. For example, based on the location or sequence of the DMRS of the PBCH, it may be possible to inform whether the corresponding cross-carrier scheduling can be set. Alternatively, based on the release information of the base station, for example, for an NR serving cell configured through a rel-17 or higher base station, it may be implicitly indicated that cross-carrier scheduling for a primary cell or a primary secondary cell is supported. .
  • cross-carrier scheduling for the primary cell or the primary secondary cell can be determined. there is.
  • the base station transmits scheduling information for a primary cell (PCell) or a primary secondary cell (PSCell) among at least two or more cells through a secondary cell (SCell), and based on the transmitted scheduling information to transmit/receive data (S1120).
  • PCell primary cell
  • PSCell primary secondary cell
  • SCell secondary cell
  • an arbitrary secondary cell is configured as a scheduling cell for a primary cell or a primary secondary cell
  • data transmission/reception through the primary cell or the primary secondary cell through DCI transmitted through the PDCCH in the secondary cell This can be scheduled.
  • the cross-carrier scheduling related information includes information that can be scheduled by the secondary cell with respect to the primary cell or the primary secondary cell
  • the CIF information area included in the DCI format transmitted from the secondary cell Through scheduling control information for a primary cell or a primary secondary cell may be transmitted.
  • the DCI format transmitted from the secondary cell includes PIF information It may further include a region. That is, when the DCI format transmitted from the secondary cell includes the PIF information region indicating the primary cell or the primary secondary cell, the DCI format may be scheduling control information for the primary cell or the primary secondary cell.
  • a search space set consisting of PDCCH candidates for transmitting the corresponding DCI format is composed of PDCCH candidates for transmitting the scheduling DCI format for the corresponding secondary cell. It can be set the same as the search space set.
  • the DCI format transmitted from the secondary cell includes a primary cell or A CIF or PIF information region indicating a primary secondary cell may be included.
  • the corresponding DCI format may indicate the primary cell or the primary secondary cell based on the existing CIF or based on a separate PIF.
  • a separate PIF is included in the corresponding DCI format
  • a separate CIF information area may not be included.
  • a separate search space for transmitting the DCI format for the primary cell or the primary secondary cell may be set.
  • the base station may transmit/receive data through the primary cell or the primary secondary cell based on the scheduling information transmitted through the secondary cell.
  • a method for transmitting and receiving data using a plurality of cells that enables more efficient data transmission and reception by configuring a primary cell or a primary secondary cell to perform scheduling through the secondary cell in the case of using a plurality of cells and devices may be provided.
  • cross-carrier scheduling in which scheduling is performed through a PCell or another scheduling SCell may be applied to any SCell, but only self-scheduling is applicable to PCell.
  • dual connectivity (DC) is configured for an arbitrary terminal
  • only self-scheduling is applied to the PCell of the Master Cell Group (MCG) and the PSCell of the Secondary Cell Group (SCG). do. That is, according to the existing cross-carrier scheduling setting method, any SCell becomes a scheduling cell that transmits a PDCCH including scheduling control information for PDSCH/PUSCH transmitted through another SCell, or is transmitted through the corresponding SCell.
  • the PDCCH including the scheduling control information for the PDSCH/PUSCH may operate as a scheduled cell in which the PDCCH is transmitted through another SCell or PCell or PSCell.
  • a PCell or a PSCell only self-scheduling of the PDCCH including scheduling control information for a PDSCH/PUSCH transmitted through a corresponding cell is supported only through its own cell.
  • cross-carrier scheduling for an arbitrary SCell is set through an RRC message.
  • An RRC message format for setting the corresponding cross-carrier scheduling is shown in FIG. 12 . Accordingly, according to the existing cross-carrier scheduling setting method, in the case of PCell and PSCell, the setting value through schedulingCellInfo is limited to 'own'. Operation as a scheduled cell in which cross-carrier scheduling of is limited is limited.
  • any serving cell configured in any UE is a PCell or PSCell
  • the network is defined not to set the corresponding PCell or PSCell as a scheduled cell through a cross-carrier scheduling RRC message. That is, schedulingCellInfo for PCell or PSCell is always set to 'own', and 'other' is defined to be set only for SCell. Accordingly, it is not expected that cross-carrier scheduling is set for PCell or PSCell in any terminal.
  • an arbitrary NR serving cell is configured based on DSS in the LTE frequency band, and the corresponding serving cell may be configured as a PCell or a PSCell in any UE.
  • another NR serving cell configured in the NR frequency band may be configured as the SCell in the corresponding UE.
  • scheduling the PCell or the PSCell through the corresponding SCell may be beneficial in terms of PDCCH capacity.
  • schedulingCellInfo may be defined to be settable to 'other' for the PCell or PSCell.
  • the schedulingCellID and carrier indicator field (CIF) values for scheduling for the PCell or PSCell may be set also for the PCell or PSCell, in the same way as when cross-carrier scheduling is configured for the existing SCell.
  • scheduling control information for the corresponding PCell or PSCell may be transmitted through the CIF information area of the DCI format transmitted through the PDCCH in the corresponding scheduling serving cell.
  • a separate RRC message is defined or a separate rel-17 information area (IE, Information Element) is defined to be included in the 'CrossCarrierSchedulingConfig' message.
  • IE Information Element
  • a new information area 'pif (PCell/PSCell Indicator Field)-presence' information area may be defined in the 'CrossCarrierSchedulingConfig' message. That is, as indicated by the underline in FIG. 14 , when the schedulingCellInfo of an arbitrary SCell is set to own, a 'pif-presence-r17' information area may be additionally configured in addition to the 'CIF-presence'. Alternatively, it can be set as a scheduling cell for the PSCell.
  • the DCI format transmitted through the PDCCH in the corresponding SCell may include pif.
  • the corresponding pif is an information area separate from cif, and is information indicating only the PCell or the PSCell. That is, when an arbitrary DCI format includes a pif and the corresponding pif indicates a PCell or a PSCell, the corresponding DCI format may be scheduling control information for the PCell or PSCell. Specifically, if the corresponding Scell belongs to the MCG, pif may be indication information for the PCell, and if the SCell belongs to the SCG, pif may be indication information for the PSCell.
  • a search space set consisting of PDCCH candidates for transmitting the DCI format for the corresponding PCell/PSCell scheduling is used for transmitting the scheduling DCI format for the corresponding SCell. It may be the same as the search space set composed of PDCCH candidates.
  • the DCI format transmitted from the corresponding SCell additionally includes cif, when the DCI format transmitted from the corresponding SCell is the scheduling DCI format for the PCell or PSCell, that is, the pif included in the DCI format indicates the PCell or the PSCell.
  • the cif may be defined to be set to a '0' value, that is, a value indicating the corresponding SCell itself, or to ignore the cif setting value in the terminal.
  • a separate RRC message for configuring an SCell scheduling a PCell or a PSCell may be defined. That is, a PS-SCell for scheduling a PCell or a PSCell may be defined, and the PS-SCell may be configured for an arbitrary SCell through UE-specific RRC signaling. If an arbitrary SCell is configured as a PS-SCell through UE-specific RRC signaling, and the SCell belongs to the MCG, it means that the SCell is configured as a scheduling cell for the PCell. do.
  • the PS-SCell configuration RRC message includes a CIF value for indicating the PCell or PSCell through the scheduling DCI format when indicating the PCell/PSCell based on the existing cif, or a separate cif value when the pif is defined may not be included.
  • the PS-SCell configuration RRC message may include separate search space configuration information for transmitting the DCI format for the PCell or the PSCell.
  • Any NR serving cell may inform the UE of whether cross-carrier scheduling can be configured through the SCell even when the corresponding cell is configured as PCell or PSCell in any UE. That is, even when the corresponding NR serving cell is set to PCell or PSCell in any UE, the schedulingCellInfor of the 'crosscarrierschedulingconfig' RRC message can be set to 'other'. You can inform the UEs in the cell.
  • whether cross-carrier scheduling for the PCell or the PSCell is configured may be explicitly transmitted to the UE through cell-specific or UE-specific RRC signaling in the corresponding cell. For example, through MIB (Master Information Block) or SIB (System Information Block), an information area for informing the UE of whether cross-carrier scheduling can be set can be defined even when the corresponding cell is a PCell or PSCell. there is.
  • MIB Master Information Block
  • SIB System Information Block
  • the cell may implicitly inform the UE of whether cross-carrier scheduling is set for the PCell or the PSCell. For example, based on the location, sequence, etc. of the DM RS of the PBCH, it is possible to inform whether the corresponding cross-carrier scheduling can be set. Or, based on the release information of the base station, for example, for an NR serving cell configured through a rel-17 or higher base station, to implicitly indicate that cross-carrier scheduling for a primary cell or a primary secondary cell is supported. can be defined
  • whether cross-carrier scheduling for the corresponding PCell or PSCell can be set is determined according to the frequency band in which the corresponding NR serving cell is configured, for example, whether it is an LTE frequency band or an NR frequency band. can do.
  • the terminal may notify the base station of whether the terminal supports cross-carrier scheduling configuration for the PCell through capability signaling.
  • the terminal may explicitly or implicitly inform the base station of this through capability signaling.
  • embodiments according to the present disclosure are not limited by the terms used in the present disclosure, such as pif, PS-SCell, etc., and other terms or names indicating the same concept and operation are also within the scope of the present disclosure. It is obvious that it can be included.
  • the PCell/PSCell is a DSS-based NR serving cell configured in the LTE frequency band, but the present disclosure is not limited thereto, regardless of the frequency band in which any PCell/PSCell is configured. can be applied.
  • FIG. 15 is a diagram showing the configuration of a user terminal 1500 according to another embodiment.
  • a user terminal 1500 includes a controller 1510 , a transmitter 1520 , and a receiver 1530 .
  • the controller 1510 controls the overall operation of the user terminal 1500 according to the data transmission/reception method using a plurality of cells necessary for carrying out the above-described present disclosure.
  • the transmitter 1520 transmits uplink control information, data, and messages to the base station through a corresponding channel.
  • the receiver 1530 receives downlink control information, data, and messages from the base station through a corresponding channel.
  • the receiver 1530 may receive cross-carrier scheduling related information for at least two or more cells.
  • the primary cell of the primary cell (PCell) in the carrier merging or the primary cell of the master cell group (MCG) in the double connection and the secondary cell group (Secondary Cell Group; SCG) of the primary secondary cell (PSCell) ) may be configured based on DSS in a radio access technology in which subcarrier spacing is set to a single value of 15 kHz, that is, in the frequency band of LTE.
  • at least one of the secondary cells (SCell) may be configured in a radio access technology in which subcarrier spacing is set to one of at least two or more candidate values, that is, in a frequency band of NR.
  • cross-carrier scheduling in which a primary cell configured in an LTE frequency band or a primary secondary cell configured in an NR frequency band is scheduled by a secondary cell configured in an NR frequency band may be configured.
  • the receiving unit 1530 may receive cross-carrier scheduling related information including information that the primary cell or the primary secondary cell can be scheduled by the secondary cell. That is, when a serving cell configured in the terminal is a primary cell or a primary secondary cell, the cross-carrier scheduling related information may include cross-carrier scheduling configuration information.
  • the scheduling cell information included in the cross-carrier scheduling configuration information may include information that can be scheduled by another cell with respect to the primary cell or the primary secondary cell. That is, the corresponding scheduling cell information may be set to an 'other' value indicating cross-carrier scheduling scheduled by the PDCCH of another cell instead of an 'own' value indicating self-scheduling. Accordingly, a scheduling cell ID and a carrier indicator field (CIF) value indicating a primary cell or a secondary cell scheduled for the primary secondary cell may be included in the cross-carrier scheduling configuration information.
  • CIF carrier indicator field
  • the receiver 1530 may receive cross-carrier scheduling related information including information indicating that scheduling can be performed on a primary cell or a primary secondary cell with respect to the secondary cell. That is, for the primary cell or the secondary cell scheduling the primary secondary cell, separate cross-carrier scheduling configuration information is set for the cross-carrier scheduling related information, or a separate information area can be added to the cross-carrier scheduling configuration information. there is.
  • the scheduling cell information is set to 'own' in the cross-carrier scheduling configuration information for the secondary cell
  • the 'CIF-presence' information area indicating whether CIF is included in the DCI format of the cell
  • a 'pif-presence-r17' information region indicating whether a PCell/PSCell Indicator Field (PIF) for indicating a primary cell or a primary secondary cell is included may be further included.
  • the receiving unit 1530 may receive cross-carrier scheduling related information including information indicating a primary cell or a secondary cell performing scheduling on a primary secondary cell among at least two or more cells.
  • the cross-carrier scheduling related information may include a separate RRC message for configuring the primary cell or the secondary cell scheduling the primary secondary cell.
  • any secondary cell may be configured as a PS-SCell through UE-specific RRC signaling.
  • cross-carrier scheduling whether it is possible to configure cross-carrier scheduling for the primary cell or the primary secondary cell from the secondary cell is explicitly indicated through cell-specific or UE-specific RRC signaling, or the configuration of the PBCH etc. may be implicitly indicated.
  • the receiver 1530 may explicitly receive whether to set cross-carrier scheduling for the primary cell or the primary secondary cell through cell-specific or UE-specific RRC signaling in the corresponding cell. For example, information indicating that cross-carrier scheduling is possible even when the corresponding cell is a primary cell or a primary secondary cell may be received through a Master Information Block (MIB) or a System Information Block (SIB).
  • MIB Master Information Block
  • SIB System Information Block
  • whether to configure cross-carrier scheduling for the primary cell or the primary secondary cell may be implicitly indicated to the UE in the corresponding cell. For example, based on the location or sequence of the DMRS of the PBCH, it may be possible to inform whether the corresponding cross-carrier scheduling can be set. Alternatively, based on the release information of the base station, for example, for an NR serving cell configured through a rel-17 or higher base station, it may be implicitly indicated that cross-carrier scheduling for a primary cell or a primary secondary cell is supported. .
  • cross-carrier scheduling for the primary cell or the primary secondary cell can be determined. there is.
  • the receiver 1530 may receive scheduling information for a primary cell (PCell) or a primary secondary cell (PSCell) from among at least two or more cells from a secondary cell (SCell).
  • the controller 1510 may control the transmitter 1520 and the receiver 1530 to transmit and receive data based on the received scheduling information.
  • the receiving unit 1530 transmits scheduling information for data transmission/reception through the primary cell or the primary secondary cell to the corresponding secondary It can be received through DCI transmitted through the PDCCH in the cell.
  • the cross-carrier scheduling related information includes information that can be scheduled by the secondary cell with respect to the primary cell or the primary secondary cell
  • the CIF information area included in the DCI format transmitted from the secondary cell Through scheduling control information for the primary cell or the primary secondary cell may be transmitted.
  • the DCI format transmitted from the secondary cell includes PIF information It may further include a region. That is, when the DCI format transmitted from the secondary cell includes the PIF information region indicating the primary cell or the primary secondary cell, the DCI format may be scheduling control information for the primary cell or the primary secondary cell.
  • the DCI format transmitted from the secondary cell includes a primary cell or A CIF or PIF information region indicating a primary secondary cell may be included.
  • the controller 1510 may control data transmission/reception through the primary cell or the primary secondary cell based on the scheduling information received from the secondary cell.
  • scheduling of the primary cell or the primary secondary cell is configured to be performed through the secondary cell, thereby enabling more efficient data transmission and reception.
  • a data transmission/reception method using a plurality of cells and devices may be provided.
  • 16 is a diagram showing the configuration of a base station 1600 according to another embodiment.
  • a base station 1600 includes a controller 1610 , a transmitter 1620 , and a receiver 1630 .
  • the controller 1610 controls the overall operation of the base station 1600 according to the data transmission/reception method using a plurality of cells necessary for carrying out the above-described present disclosure.
  • the transmitter 1620 and the receiver 1630 are used to transmit/receive signals, messages, and data necessary for carrying out the above-described present disclosure with the terminal.
  • the transmitter 1620 may transmit cross-carrier scheduling related information for at least two or more cells to the terminal.
  • the primary cell of the primary cell (PCell) in the carrier merging or the primary cell of the master cell group (MCG) in the double connection and the secondary cell group (Secondary Cell Group; SCG) of the primary secondary cell (PSCell) ) may be configured based on DSS in a radio access technology in which subcarrier spacing is set to a single value of 15 kHz, that is, in the frequency band of LTE.
  • at least one of the secondary cells (SCell) may be configured in a radio access technology in which subcarrier spacing is set to one of at least two or more candidate values, that is, in a frequency band of NR.
  • cross-carrier scheduling in which a primary cell configured in an LTE frequency band or a primary secondary cell configured in an NR frequency band is scheduled by a secondary cell configured in an NR frequency band may be configured.
  • the transmitter 1620 may transmit, to the primary cell or the primary secondary cell, cross-carrier scheduling related information including information indicating that schedule can be performed by the secondary cell. That is, when a serving cell configured in the terminal is a primary cell or a primary secondary cell, the cross-carrier scheduling related information may include cross-carrier scheduling configuration information.
  • the scheduling cell information included in the cross-carrier scheduling configuration information may include information that can be scheduled by another cell with respect to the primary cell or the primary secondary cell. That is, the corresponding scheduling cell information may be set to an 'other' value indicating cross-carrier scheduling scheduled by the PDCCH of another cell instead of an 'own' value indicating self-scheduling. Accordingly, a scheduling cell ID and a carrier indicator field (CIF) value indicating a primary cell or a secondary cell scheduled for the primary secondary cell may be included in the cross-carrier scheduling configuration information.
  • CIF carrier indicator field
  • the transmitter 1620 may transmit, with respect to the secondary cell, cross-carrier scheduling related information including information indicating that scheduling for the primary cell or the primary secondary cell can be performed. That is, for the primary cell or the secondary cell scheduling the primary secondary cell, separate cross-carrier scheduling configuration information is set for the cross-carrier scheduling related information, or a separate information area can be added to the cross-carrier scheduling configuration information. there is.
  • the scheduling cell information is set to 'own' in the cross-carrier scheduling configuration information for the secondary cell
  • the 'CIF-presence' information area indicating whether CIF is included in the DCI format of the cell
  • a 'pif-presence-r17' information region indicating whether a PCell/PSCell Indicator Field (PIF) for indicating a primary cell or a primary secondary cell is included may be further included.
  • the transmitter 1620 may transmit cross-carrier scheduling related information including information indicating a primary cell or a secondary cell performing scheduling on a primary secondary cell among at least two or more cells.
  • the cross-carrier scheduling related information may include a separate RRC message for configuring the primary cell or the secondary cell scheduling the primary secondary cell.
  • any secondary cell may be configured as a PS-SCell through UE-specific RRC signaling.
  • cross-carrier scheduling whether it is possible to configure cross-carrier scheduling for the primary cell or the primary secondary cell from the secondary cell is explicitly indicated through cell-specific or UE-specific RRC signaling, or the configuration of the PBCH etc. may be implicitly indicated.
  • the transmitter 1620 may explicitly transmit whether to configure cross-carrier scheduling for a primary cell or a primary secondary cell through cell-specific or UE-specific RRC signaling in the corresponding cell. For example, information indicating that cross-carrier scheduling is possible even when the corresponding cell is a primary cell or a primary secondary cell may be transmitted through a Master Information Block (MIB) or a System Information Block (SIB).
  • MIB Master Information Block
  • SIB System Information Block
  • whether to configure cross-carrier scheduling for the primary cell or the primary secondary cell may be implicitly indicated to the UE in the corresponding cell. For example, based on the location or sequence of the DMRS of the PBCH, it may be possible to inform whether the corresponding cross-carrier scheduling can be set. Alternatively, based on the release information of the base station, for example, for an NR serving cell configured through a rel-17 or higher base station, it may be implicitly indicated that cross-carrier scheduling for a primary cell or a primary secondary cell is supported. .
  • cross-carrier scheduling for the primary cell or the primary secondary cell may be determined. there is.
  • the transmitter 1620 may transmit scheduling information for a primary cell (PCell) or a primary secondary cell (PSCell) among at least two or more cells through a secondary cell (SCell).
  • the controller 1610 may control the transmitter 1620 and the receiver 1630 to transmit and receive data based on the transmitted scheduling information.
  • the transmitter 1620 transmits scheduling information for data transmission/reception through the primary cell or the primary secondary cell to the corresponding secondary It can be transmitted through DCI transmitted through the PDCCH in the cell.
  • the cross-carrier scheduling related information includes information that can be scheduled by the secondary cell with respect to the primary cell or the primary secondary cell
  • the CIF information area included in the DCI format transmitted from the secondary cell Through scheduling control information for a primary cell or a primary secondary cell may be transmitted.
  • the DCI format transmitted from the secondary cell includes PIF information It may further include a region. That is, when the DCI format transmitted from the secondary cell includes the PIF information region indicating the primary cell or the primary secondary cell, the DCI format may be scheduling control information for the primary cell or the primary secondary cell.
  • DCI format transmitted from the secondary cell includes a primary cell or A CIF or PIF information region indicating a primary secondary cell may be included.
  • the controller 1610 may control to transmit/receive data through the primary cell or the primary secondary cell based on the scheduling information transmitted through the secondary cell.
  • scheduling of the primary cell or the primary secondary cell is configured to be performed through the secondary cell, thereby enabling more efficient data transmission and reception.
  • the above-described embodiments may be implemented through various means.
  • the present embodiments may be implemented by hardware, firmware, software, or a combination thereof.
  • the method according to the present embodiments may include one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), FPGAs (Field Programmable Gate Arrays), may be implemented by a processor, a controller, a microcontroller or a microprocessor.
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • DSPDs Digital Signal Processing Devices
  • PLDs Programmable Logic Devices
  • FPGAs Field Programmable Gate Arrays
  • the method according to the present embodiments may be implemented in the form of an apparatus, procedure, or function that performs the functions or operations described above.
  • the software code may be stored in the memory unit and driven by the processor.
  • the memory unit may be located inside or outside the processor, and may transmit/receive data to and from the processor by various well-known means.
  • terms such as “system”, “processor”, “controller”, “component”, “module”, “interface”, “model”, or “unit” generally refer to computer-related entities hardware, hardware and software. may mean a combination of, software, or running software.
  • the aforementioned component may be, but is not limited to, a process run by a processor, a processor, a controller, a controlling processor, an object, a thread of execution, a program, and/or a computer.
  • an application running on a controller or processor and a controller or processor can be a component.
  • One or more components may reside within a process and/or thread of execution, and the components may be located on one device (eg, a system, computing device, etc.) or distributed across two or more devices.

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

Abstract

Les modes de réalisation de la présente invention concernent un procédé et un dispositif d'émission/réception de données au moyen d'une pluralité de cellules, et fournissent un procédé comprenant les étapes consistant à : recevoir des informations relatives à une planification inter porteuses concernant au moins deux cellules ; recevoir, en provenance d'une cellule secondaire (SCell), des informations de planification concernant une cellule primaire (PCell) ou une cellule secondaire primaire (PSCell) parmi au moins deux cellules ; et transmettre ou recevoir des données sur la base des informations de planification.
PCT/KR2021/012590 2020-09-11 2021-09-15 Procédé et dispositif de transmission ou de réception de données à l'aide d'une pluralité de cellules WO2022055336A1 (fr)

Applications Claiming Priority (4)

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KR20200116848 2020-09-11
KR10-2020-0116848 2020-09-11
KR1020210111544A KR20220035013A (ko) 2020-09-11 2021-08-24 복수의 셀을 이용한 데이터 송수신 방법 및 장치
KR10-2021-0111544 2021-08-24

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