WO2018128440A1 - Procédé d'émission ou de réception d'un canal de commande de liaison descendante dans un réseau sans fil de prochaine génération et appareil associé - Google Patents

Procédé d'émission ou de réception d'un canal de commande de liaison descendante dans un réseau sans fil de prochaine génération et appareil associé Download PDF

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Publication number
WO2018128440A1
WO2018128440A1 PCT/KR2018/000221 KR2018000221W WO2018128440A1 WO 2018128440 A1 WO2018128440 A1 WO 2018128440A1 KR 2018000221 W KR2018000221 W KR 2018000221W WO 2018128440 A1 WO2018128440 A1 WO 2018128440A1
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Prior art keywords
information
search space
common search
downlink control
control channel
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PCT/KR2018/000221
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English (en)
Korean (ko)
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박규진
최우진
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주식회사 케이티
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Priority claimed from KR1020170066632A external-priority patent/KR20180081669A/ko
Priority claimed from KR1020180001157A external-priority patent/KR102114096B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to EP18736364.3A priority Critical patent/EP3547591A4/fr
Priority to US16/464,135 priority patent/US11160051B2/en
Priority to CN201880004512.1A priority patent/CN110024323B/zh
Publication of WO2018128440A1 publication Critical patent/WO2018128440A1/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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present embodiments relate to a method and apparatus for transmitting and receiving a downlink control channel (PDCCH) in a next generation / 5G wireless access network (hereinafter also referred to as "NR (New Radio)", which has been discussed in 3GPP.
  • a common search space (CSS) is configured to transmit cell-specific downlink control information (DCI) to a terminal through a downlink control channel, and downlink control is performed through the configured common search space.
  • DCI downlink control information
  • RAN WG1 has frame structure, channel coding and modulation for NR (New Radio) respectively. Discussions on waveforms and multiple access schemes are underway.
  • NR is required to be designed to meet various requirements required for each segmented and detailed usage scenario as well as improved data rate in preparation for LTE / LTE-Advanced.
  • eMBB enhancement Mobile BroadBand
  • MMTC massive machine type communication
  • URLLC Ultra Reliable and Low Latency Communications
  • CSS Common Search Space
  • DCI cell-specific downlink control information
  • PDCH downlink control channel
  • RMSI remaining minimum system information
  • An object of the present embodiments is to provide a specific scheme for transmitting and receiving a downlink control channel used for transmitting and receiving scheduling control information based on different time / frequency resources for each terminal in NR in which various usage scenarios exist. There is.
  • a method of receiving a downlink control channel (PDCCH) by a terminal comprising: receiving configuration information on a common search space (CSS) from a base station; Receiving a downlink control channel (PDCCH) including information for scheduling remaining minimum system information (RMSI) through a common search space, wherein the configuration information includes a physical broadcast channel (PBCH) It is included in the Master Information Block (MIB) received through the method provides a method characterized in that it is received from the base station.
  • PBCH physical broadcast channel
  • MIB Master Information Block
  • an embodiment of the present invention provides a method for transmitting a downlink control channel (PDCCH), the method comprising: setting configuration information for a common search space (CSS), transmitting configuration information to a terminal; Transmitting a downlink control channel (PDCCH) including information for scheduling remaining minimum system information (RMSI) through a common search space, wherein the configuration information includes a physical broadcast channel (PBCH); Provided is included in the Master Information Block (MIB) transmitted through the transmission to the terminal.
  • PBCH physical broadcast channel
  • MIB Master Information Block
  • a terminal receiving a downlink control channel receives configuration information regarding a common search space (CSS) from a base station, and the remaining minimum system information (RMSI) is maintained.
  • PBCH Physical Broadcast Channel
  • a base station transmitting a downlink control channel includes: a control unit for setting configuration information on a common search space (CSS) and configuration information on a common search space to a terminal; And a transmitter for transmitting a downlink control channel (PDCCH) including information for scheduling remaining minimum system information (RMSI) through the common search space, wherein the configuration information for the common search space is included.
  • a MIB Master Information Block
  • PBCH physical broadcast channel
  • a specific scheme for transmitting and receiving a downlink control channel used for transmitting and receiving scheduling control information based on different time / frequency resources for each terminal may be provided.
  • FIG. 1 is a diagram illustrating alignment of OFDM symbols when different subcarrier spacings are used.
  • BWP bandwidth part
  • FIG. 3 is a diagram illustrating a procedure of receiving a downlink control channel by a terminal in this embodiment.
  • FIG. 4 is a diagram illustrating a procedure for transmitting a downlink control channel by a base station in this embodiment.
  • FIG. 5 is a diagram illustrating a configuration of a base station according to the present embodiments.
  • FIG. 6 is a diagram illustrating a configuration of a user terminal according to the present embodiments.
  • the wireless communication system refers to a system for providing various communication services such as voice and packet data.
  • the wireless communication system includes a user equipment (UE) and a base station (BS).
  • UE user equipment
  • BS base station
  • a user terminal is a comprehensive concept of a terminal in a wireless communication, and includes a user equipment (UE) in WCDMA, LTE, HSPA, and IMT-2020 (5G or New Radio), as well as a mobile station (MS) and a UT in GSM. It should be interpreted as a concept that includes a user terminal, a subscriber station (SS), and a wireless device.
  • UE user equipment
  • LTE Long Term Evolution
  • HSPA High Speed Packet Access
  • IMT-2020 5G or New Radio
  • a base station or cell generally refers to a station that communicates with a user terminal, and includes a Node-B, an evolved Node-B, an eNB, a gNode-B, and a Low Power Node. ), Sector, site, various types of antennas, base transceiver system (BTS), access point, access point (for example, transmission point, reception point, transmission / reception point), relay node ( It is meant to encompass various coverage areas such as a relay node, a mega cell, a macro cell, a micro cell, a pico cell, a femto cell, a remote radio head (RRH), a radio unit (RU), and a small cell.
  • BTS base transceiver system
  • access point for example, transmission point, reception point, transmission / reception point
  • relay node It is meant to encompass various coverage areas such as a relay node, a mega cell, a macro cell, a micro cell, a pico cell, a femto cell,
  • the base station may be interpreted in two meanings. 1) the device providing the mega cell, the macro cell, the micro cell, the pico cell, the femto cell, the small cell in relation to the wireless area, or 2) the wireless area itself. In 1) all devices that provide a given radio area are controlled by the same entity or interact with each other to cooperatively configure the radio area to the base station. According to the configuration of the wireless area, a point, a transmission point, a transmission point, a reception point, and the like become one embodiment of a base station. In 2), the base station may indicate the radio area itself that receives or transmits a signal from the viewpoint of the user terminal or the position of a neighboring base station.
  • a cell refers to a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.
  • the user terminal and the base station are used in a comprehensive sense as two entities (uplink or downlink) transmitting and receiving subjects used to implement the technology or technical idea described in the present invention, and are not limited by the terms or words specifically referred to. Do not.
  • the uplink (Uplink, UL, or uplink) refers to a method for transmitting and receiving data to the base station by the user terminal
  • the downlink (Downlink, DL, or downlink) means to transmit and receive data to the user terminal by the base station It means the way.
  • the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, and use a frequency division duplex (FDD) scheme, a TDD scheme, and an FDD scheme, which are transmitted using different frequencies.
  • TDD time division duplex
  • FDD frequency division duplex
  • TDD scheme TDD scheme
  • FDD scheme FDD scheme
  • a standard is configured by configuring uplink and downlink based on one carrier or a pair of carriers.
  • the uplink and the downlink transmit control information through a control channel such as a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH), a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), and the like. It is composed of the same data channel to transmit data.
  • a control channel such as a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH), a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), and the like. It is composed of the same data channel to transmit data.
  • Downlink may mean a communication or communication path from the multiple transmission and reception points to the terminal
  • uplink may mean a communication or communication path from the terminal to the multiple transmission and reception points.
  • the transmitter in the downlink, the transmitter may be part of multiple transmission / reception points, and the receiver may be part of the terminal.
  • a transmitter in uplink, a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.
  • a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, and a PDSCH may be described in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH, and a PDSCH.
  • high layer signaling described below includes RRC signaling for transmitting RRC information including an RRC parameter.
  • the base station performs downlink transmission to the terminals.
  • the base station transmits downlink control information such as scheduling required for reception of a downlink data channel, which is a main physical channel for unicast transmission, and a physical downlink for transmitting scheduling grant information for transmission on an uplink data channel.
  • the control channel can be transmitted.
  • the transmission and reception of signals through each channel will be described in the form of transmission and reception of the corresponding channel.
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • CDMA Code Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • NOMA Non-Orthogonal Multiple Access
  • OFDM-TDMA OFDM-FDMA
  • SCMA sparse code multiple access
  • LDS low density spreading
  • One embodiment of the present invention is for asynchronous radio communication evolving to LTE / LTE-Advanced, IMT-2020 via GSM, WCDMA, HSPA, and synchronous radio communication evolving to CDMA, CDMA-2000 and UMB. Can be applied.
  • a MTC terminal may mean a terminal supporting low cost (or low complexity) or a terminal supporting coverage enhancement.
  • the MTC terminal may mean a terminal defined in a specific category for supporting low cost (or low complexity) and / or coverage enhancement.
  • the MTC terminal may mean a newly defined 3GPP Release-13 low cost (or low complexity) UE category / type for performing LTE-based MTC related operations.
  • the MTC terminal supports enhanced coverage compared to the existing LTE coverage, or UE category / type defined in the existing 3GPP Release-12 or lower, or newly defined Release-13 low cost (or supporting low power consumption).
  • low complexity can mean UE category / type.
  • it may mean a further Enhanced MTC terminal defined in Release-14.
  • a NB-IoT (NarrowBand Internet of Things) terminal refers to a terminal that supports radio access for cellular IoT.
  • the objectives of NB-IoT technology include improved Indoor coverage, support for large scale low speed terminals, low sensitivity, low cost terminal cost, low power consumption, and optimized network architecture.
  • NR New Radio
  • eMBB enhanced Mobile BroadBand
  • MMTC massive machine type communication
  • URLLC Ultra Reliable and Low Latency Communication
  • NR New Radio
  • the NR is required to be designed to meet various requirements required for each detailed and detailed usage scenario as well as an improved data rate compared to LTE / LTE-Advanced.
  • eMBB enhancement Mobile BroadBand
  • MMTC massive MTC
  • URLLC Ultra Reliable and Low Latency Communications
  • a flexible frame structure design has been required in comparison to LTE / LTE-Advanced.
  • eMBB, mMTC and URLLC are considered as a typical usage scenario of NR under discussion in 3GPP.
  • Each usage scenario has different requirements for data rates, latency, coverage, and so on, so each usage scenario uses frequency bands that make up any NR system.
  • Effectively multiplexing radio resource units based on different numerology eg subcarrier spacing, subframe, TTI, etc.
  • numerology eg subcarrier spacing, subframe, TTI, etc.
  • a subframe is defined as a kind of time domain structure, and reference numerology is used to define a subframe duration.
  • reference numerology is used to define a subframe duration.
  • the LTE it was decided to define a single subframe duration consisting of 14 OFDM symbols of the same 15kHz sub-carrier spacing (SCS) based normal CP overhead. Accordingly, in NR, the subframe has a time duration of 1 ms.
  • subframes of NR are absolute reference time durations
  • slots and mini-slots are time units based on actual uplink / downlink data scheduling.
  • any slot may consist of 14 symbols, and all symbols may be used for DL transmission or all symbols may be uplink transmission according to the transmission direction of the slot. It may be used for UL transmission, or in the form of a DL portion + gap + uplink portion (UL portion).
  • a short slot time-domain scheduling interval for transmitting / receiving up / down link data is defined based on a mini-slot consisting of fewer symbols than a corresponding slot in a random number (numerology) (or SCS).
  • a scheduling interval may be set or a long time-domain scheduling interval for transmitting and receiving uplink / downlink data through slot aggregation may be configured.
  • slot length based on the 15 kHz is While 0.5 ms, the slot length based on 60 kHz is reduced to about 0.125 ms.
  • the NR discusses how to satisfy the requirements of URLLC and eMBB by defining different SCSs or different TTI lengths.
  • scalable bandwidth operation was supported for an arbitrary component carrier (CC). That is, according to the frequency deployment scenario (deployment scenario), when any LTE operator configures one LTE CC, a minimum bandwidth of 1.4 MHz to 20 MHz could be configured. Accordingly, any general LTE terminal supported transmit / receive capacity for a bandwidth of 20 MHz for one LTE CC.
  • CC component carrier
  • bandwidth parts BWPs
  • bandwidths segmented for any NR CC may be configured.
  • support for flexible wider bandwidth operation is required by configuring and activating different bandwidth parts for each terminal.
  • a bandwidth part that is a part of the entire bandwidth of one NR CC may be defined, and each terminal may activate and use any bandwidth part of the configured N bandwidth parts.
  • any NR CC may be divided into one or more bandwidth parts, and thus, one or more bandwidth parts may be configured for each UE. And activating one or more bandwidth parts among one or more bandwidth parts configured for any terminal, and using the activated bandwidth part, the uplink / downlink radio signal and the radio for the corresponding terminal. It may be defined that transmission and reception on a channel is performed.
  • the pneumatics of subcarrier spacing can be easily defined in order to define short time interval resource allocation units suitable for URLLC.
  • Mixed numerology method that supports the numerology of roller paper and subcarrier spacing (eg 15 kHz for eMBB or 3.75 kHz for mMTC) suitable for eMBB and mMTC through one NR carrier This is possible.
  • time-domain scheduling units of different lengths such as subframes or slots or mini-slots, within an NR carrier operating with any particular numerology.
  • a resource of a downlink control channel for transmitting and receiving scheduling control information based on different time-domain scheduling units for each terminal in NR considering various usage scenarios as described above is set. It describes a method and a method for monitoring the downlink control channel of the terminal.
  • the CSS setting method proposed in this embodiment may be specifically interpreted as a method of setting a control resource set (CORESET, Control Resource Set) including the corresponding CSS.
  • the cell-specific DCI included in the PDCCH transmitted through the CSS configured in the corresponding CORESET is i) scheduling control information for the remaining minimum system information (RMSI), ii) cell-specific (cell-specific) TPC (Transmit Power Control) related configuration information, iii) scheduling control information for the paging (paging) message, iv) scheduling control information for the random access response (RAR).
  • RMSI remaining minimum system information
  • cell-specific TPC Transmit Power Control
  • RAR random access response
  • Embodiments described below may be applied to a terminal, a base station, and a core network entity (MME) using all mobile communication technologies.
  • the present embodiments can be applied not only to mobile communication terminals to which LTE technology is applied but also to next generation mobile communication (5G mobile communication, New-RAT) terminals, base stations, and core network entities (AMFs).
  • the base station may refer to an eNB of LTE / E-UTRAN, and a base station (CU, DU, or CU and DU) may be represented in a 5G wireless network in which a central unit (CU) and a distributed unit (DU) are separated.
  • An entity implemented as one logical entity gNB.
  • numerology refers to the numerical characteristics and meaning of the numerical value for data transmission and reception, and may be determined by the value of subcarrier spacing (hereinafter also referred to as SCS or Subcarrier Spacing). . Therefore, different numerology (numerology) may mean that the subcarrier spacing that determines the numerology (numerology) is different.
  • the slot length may be represented by the number of OFDM symbols constituting the slot, or may be represented by the time occupied by the slot.
  • the length of one slot may be represented by 14 OFDM symbols and may be represented by 1 ms.
  • the remaining minimum system information may also be referred to as SIB1 since the remaining minimum system information (RMSI) may be transmitted to the UE as SIB1 as part of the system information.
  • SIB1 The system information transmitted to the terminal through another SIB other than SIB1 may be referred to as other system information (OSI).
  • OSI system information
  • FIG. 3 is a diagram illustrating a procedure of receiving a downlink control channel by a terminal in this embodiment.
  • the terminal may receive configuration information on a common search space (CSS) from the base station (S300).
  • SCS common search space
  • configuration information on the common search space may be included in a master information block (MIB) received through a physical broadcast channel (PBCH). That is, the base station may broadcast a master information block (MIB) to terminals in a cell through the PBCH, and may include configuration information about a common search space in the MIB.
  • MIB master information block
  • PBCH physical broadcast channel
  • An example of the information included in the configuration information may be subcarrier spacing (SCS) information for the downlink control channel transmitted to the terminal through the common search space.
  • SCS subcarrier spacing
  • the configuration information for the common search space may include pneumatic configuration information for the PDCCH.
  • the configuration information for the common search space may include the subcarrier spacing information.
  • time resource allocation information and frequency resource allocation information for the common search space may be included.
  • the time resource allocation information may be information about a period of the common search space.
  • the period may be defined as a fixed value irrespective of the subcarrier spacing value or the slot length, may be defined as a function of the subcarrier spacing value, and the subcarrier spacing value and slot used for transmission of the PSS / SSS or PBCH. It may be set by the length.
  • the frequency resources allocated by the frequency resource allocation information may be allocated to one or more consecutive physical resource blocks (PRBs). That is, the frequency resource allocation information may include information about a group of consecutive PRBs forming a common search space.
  • PRBs physical resource blocks
  • the UE may receive a downlink control channel (PDCCH) including information for scheduling remaining minimum system information (RMSI) through the aforementioned common search space (S310).
  • PDCH downlink control channel
  • RMSI remaining minimum system information
  • the terminal may receive the downlink control channel through the common search space based on the configuration information on the common search space received in step S300.
  • the downlink control channel received through the common search space may include cell-specific downlink control information (cell-specific DCI) common to all terminals in a cell.
  • cell-specific DCI cell-specific downlink control information
  • RMSI remaining minimum system information
  • FIG. 4 is a diagram illustrating a procedure for transmitting a downlink control channel by a base station in this embodiment.
  • the base station may set configuration information about a common search space (CSS) (S400).
  • SCS common search space
  • An example of the information included in the configuration information may be subcarrier spacing (SCS) information for the downlink control channel transmitted to the terminal through the common search space.
  • SCS subcarrier spacing
  • the configuration information for the common search space may include pneumatic configuration information for the PDCCH.
  • the configuration information for the common search space may include the subcarrier spacing information.
  • time resource allocation information and frequency resource allocation information for the common search space may be included.
  • the time resource allocation information may be information about a period of the common search space.
  • the period may be defined as a fixed value irrespective of the subcarrier spacing value or the slot length, may be defined as a function of the subcarrier spacing value, and the subcarrier spacing value and slot used for transmission of the PSS / SSS or PBCH. It may be set by the length.
  • the frequency resources allocated by the frequency resource allocation information may be allocated to one or more consecutive physical resource blocks (PRBs).
  • the frequency resource allocation information may include information about a group of consecutive PRBs forming a common search space.
  • the base station may transmit configuration information on the aforementioned common search space (CSS) to the terminal (S410).
  • CSS common search space
  • configuration information regarding the common search space may be included in a master information block (MIB) received through a physical broadcast channel (PBCH) as described above with reference to FIG. 3. That is, when the base station broadcasts a master information block (MIB) to a terminal in a cell through a PBCH, the base station may include configuration information about a common search space in the MIB.
  • MIB master information block
  • PBCH physical broadcast channel
  • the base station may transmit a downlink control channel (PDCCH) including information for scheduling remaining minimum system information (RMSI) through the common search space (S420).
  • PDCH downlink control channel
  • RMSI remaining minimum system information
  • the base station may transmit the downlink control channel to the terminal through the common search space based on the configuration information for the common search space set in step S400.
  • the downlink control channel received through the common search space may include cell-specific downlink control information (cell-specific DCI) common to all terminals in the cell.
  • cell-specific DCI cell-specific downlink control information
  • RMSI remaining minimum system information
  • setting information on a time duration resource for a corresponding CSS in a certain NR CC (Cell Carrier) / cell may be setting information about a cycle in which the corresponding CSS is configured.
  • NR it is required to support multiple numerologies based on different SCSs. Accordingly, in NR, data scheduling based on different SCS-based frame structures and corresponding slot lengths may be performed according to frequency bands or usage scenarios in which the corresponding NR cells are configured.
  • the CSS period may be set to have any fixed period regardless of the value of the SCS and the corresponding slot length.
  • CSS may be defined to be set in the aforementioned subframe unit, that is, 1 ms unit.
  • the period of the CSS may be set as a function of the SCS value. That is, the corresponding CSS period may vary according to the SCS value constituting a cell of any NR. At this time, the period of the CSS may be defined as a function of the SCS value or may be defined as a function of the slot length set in the corresponding NR cell.
  • CSS may be set in a slot unit defined in a corresponding NR cell.
  • the corresponding CSS may be configured based on the SCS through which the PSS / SSS or the PBCH is transmitted and the corresponding slot length.
  • separate CSS may be set according to each SCS and slot length.
  • the base station or the network may set the period of the corresponding CSS, and may be transmitted to the terminal through cell-specific RRC signaling such as MIB or SIB.
  • the CSS-related period setting information may be included in the MIB transmitted through the PBCH.
  • the period-related configuration information includes: i) transmission configuration information of CSS based on slot numerology configuration and slot length, and ii) radio frame or subframe.
  • Period setting information in units of frames, iii) a slot index (indices) or subframe index (indices) in which CSS is configured in a corresponding radio frame in units of one or more radio frames )) May be related information.
  • allocation information on frequency interval resources for a corresponding CSS in an arbitrary NR CC / cell may include a subband including a group of consecutive physical resource blocks (PRBs) including the corresponding CSS.
  • PRBs physical resource blocks
  • a method for defining a group of PRBs, ie, sub-bands, for composing CSS in the corresponding subframe or slot is as follows.
  • the group of PRBs may be defined in the form of a function taking as arguments the physical cell ID (PCI), subframe or slot index of the cell, the system bandwidth of the cell (number of PRBs), and the SCS value. Can be defined as the form of a function with some arguments.
  • the base station may set whether to apply the above factors, and may transmit the same to the terminal through cell-specific RRC signaling such as MIB or SIB. And the terminal may configure a sub-band (sub-band) for the CSS based on this.
  • cell-specific RRC signaling such as MIB or SIB.
  • the terminal may configure a sub-band (sub-band) for the CSS based on this.
  • CSS sub-bands defined in units of each subframe or slot may be defined to be the same as each other or to be hopped according to the corresponding subframe or slot index.
  • frequency resource allocation information for configuring CSS in a base station or network may be directly set, and may be defined to be transmitted through cell-specific RRC signaling such as MIB or SIB.
  • the frequency resource allocation information for configuring the CSS may be defined to be included in the MIB and transmitted through the PBCH.
  • the frequency resource allocation information may be bandwidth part allocation information in which CSS is configured or allocation information of a PRB in the bandwidth part.
  • the frequency resource for which the CSS is configured may be limited to the frequency band in which the SS block is transmitted in the corresponding NR CC / cell.
  • the CSS may be configured through a bandwidth through which PSS / SSS or PBCH transmission is performed.
  • the CSS may be configured to be configured through the same PRB as the PRB to which the PSS / SSS or PBCH is transmitted, or the CSS may be configured through a bandwidth part including the PSS / SSS or PBCH. You may.
  • Embodiment 3 a method for establishing transmission numerology for a downlink control channel (PDCCH) including a cell-specific DCI transmitted through a CSS or a CORESET configured with CSS is described.
  • PDCCH downlink control channel
  • transmission numerology transmission numerology
  • the transmission numerology of the CSS in the base station or the network may be transmitted to the terminal through cell-specific RRC signaling (cell-specific RRC signaling, such as MIB or SIB).
  • cell-specific RRC signaling such as MIB or SIB.
  • transmission numerology related configuration information e.g. SCS or CP (Cyclic Prefix) length related configuration information, etc.
  • transmission numerology related configuration information e.g. SCS or CP (Cyclic Prefix) length related configuration information, etc.
  • a CORESET setting in which a plurality of CSSs or CSSs are configured for each purpose / use of each CSS may be defined.
  • CSS for transmitting PDCCH including scheduling control information for RMSI, ii) other system information, that is, scheduling control information for MIB and other system information except RMSI transmitted through PBCH.
  • CSS for transmitting a PDCCH iii) CSS for transmitting scheduling control information for a random access response (RAR), iv) CSS for transmitting scheduling control information for a paging message, v) configuration for each terminal CSS for fallback operation for the UE-specific Search Space (USS), vi) TPC command, and other multicast / broadcast control information such as CSS for transmitting purpose / purpose.
  • RAR random access response
  • USS UE-specific Search Space
  • each CSS setting may be hierarchical. That is, the respective CSS configuration information described in the first, second, and third embodiments described above may be sequentially performed through the MIB, the RMSI, and the like.
  • CSS setting information for RMSI is transmitted through MIB transmitted through PBCH, and CSS setting information for paging, RAR, etc. for CSS or other system information is transmitted through RMSI. Can be sent.
  • RMSI Resource Management Entity
  • all cases where a plurality of CSSs are defined according to a purpose and a purpose, and each CSS-related setting is hierarchical may be included in the scope of the present embodiment.
  • FIG. 5 is a diagram illustrating a configuration of a base station according to the present embodiments.
  • the base station 500 includes a controller 510, a transmitter 520, and a receiver 530.
  • the controller 510 controls the overall operation of the base station according to the base station required to perform the above-described embodiment transmits the downlink control channel.
  • the controller may set configuration information about a common search space (CSS).
  • CSS common search space
  • An example of the information included in the configuration information may be subcarrier spacing (SCS) information for the downlink control channel transmitted to the terminal through the common search space.
  • SCS subcarrier spacing
  • the configuration information for the common search space may include pneumatic configuration information for the PDCCH.
  • the configuration information for the common search space may include the subcarrier spacing information.
  • time resource allocation information and frequency resource allocation information for the common search space may be included.
  • the time resource allocation information may be information about a period of the common search space.
  • the period may be defined as a fixed value irrespective of the subcarrier spacing value or the slot length, may be defined as a function of the subcarrier spacing value, and the subcarrier spacing value and slot used for transmission of the PSS / SSS or PBCH. It may be set by the length.
  • the frequency resources allocated by the frequency resource allocation information may be allocated to one or more consecutive physical resource blocks (PRBs).
  • the frequency resource allocation information may include information about a group of consecutive PRBs forming a common search space.
  • the transmitter 520 and the receiver 530 are used to transmit and receive signals, messages, and data necessary for carrying out the above-described present invention.
  • the transmitter 520 transmits configuration information on a common search space to a terminal and common search for a downlink control channel (PDCCH) including information for scheduling remaining minimum system information (RMSI). You can transmit through space.
  • PDCCH downlink control channel
  • RMSI scheduling remaining minimum system information
  • the configuration information for the common search space may be included in the MIB (Master Information Block) transmitted through the physical broadcast channel (PBCH) as described above in FIG. 4 and transmitted to the terminal.
  • MIB Master Information Block
  • PBCH physical broadcast channel
  • the base station may transmit the downlink control channel to the terminal through the common search space based on the configuration information for the common search space.
  • the downlink control channel received through the common search space may include cell-specific downlink control information (cell-specific DCI) common to all terminals in the cell.
  • cell-specific DCI cell-specific downlink control information
  • RMSI remaining minimum system information
  • FIG. 6 is a diagram illustrating a configuration of a user terminal according to the present embodiments.
  • the user terminal 600 includes a receiver 610, a controller 620, and a transmitter 630.
  • the receiver 610 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • the receiver 610 may receive configuration information about a common search space (CSS) from a base station.
  • SCS common search space
  • configuration information on the common search space may be included in a master information block (MIB) received through a physical broadcast channel (PBCH). That is, when the base station broadcasts a master information block (MIB) to a terminal in a cell through a PBCH, the base station may include configuration information about a common search space in the MIB.
  • MIB master information block
  • PBCH physical broadcast channel
  • An example of the information included in the configuration information may be subcarrier spacing (SCS) information for the downlink control channel transmitted to the terminal through the common search space.
  • SCS subcarrier spacing
  • the configuration information for the common search space may include pneumatic configuration information for the PDCCH.
  • the configuration information for the common search space may include the subcarrier spacing information.
  • time resource allocation information and frequency resource allocation information for the common search space may be included.
  • the time resource allocation information may be information about a period of the common search space.
  • the period may be defined as a fixed value irrespective of the subcarrier spacing value or the slot length, may be defined as a function of the subcarrier spacing value, and the subcarrier spacing value and slot used for transmission of the PSS / SSS or PBCH. It may be set by the length.
  • the frequency resources allocated by the frequency resource allocation information may be allocated to one or more consecutive physical resource blocks (PRBs).
  • the frequency resource allocation information may include information about a group of consecutive PRBs forming a common search space.
  • the receiver 610 may receive a downlink control channel (PDCCH) including information for scheduling remaining minimum system information (RMSI) through a common search space.
  • PDCH downlink control channel
  • RMSI remaining minimum system information
  • the downlink control channel received through the common search space may include cell-specific downlink control information (cell-specific DCI) common to all terminals in a cell.
  • cell-specific DCI cell-specific downlink control information
  • RMSI remaining minimum system information
  • controller 620 controls the overall operation of the user terminal 600 according to receiving the downlink control channel (PDCCH) necessary to perform the above-described embodiment.
  • PDCCH downlink control channel

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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 appareil d'émission ou de réception d'un canal de commande de liaison descendante dans un réseau d'accès sans fil de prochaine génération/5G. Un mode de réalisation concerne un procédé de réception d'un canal de commande de liaison descendante par un terminal, le procédé comprenant les étapes suivantes : réception d'informations de configuration relatives à un espace de recherche commun (CSS) de la part d'une station de base ; et réception, par le biais de l'espace de recherche commun, d'un canal de commande de liaison descendante contenant des informations pour planifier des informations de système minimales restantes (RMSI). Les informations de configuration sont incluses dans un bloc d'informations maître (MIB) reçu par le biais d'un canal de diffusion physique et sont reçues de la part de la station de base.
PCT/KR2018/000221 2017-01-06 2018-01-05 Procédé d'émission ou de réception d'un canal de commande de liaison descendante dans un réseau sans fil de prochaine génération et appareil associé WO2018128440A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18736364.3A EP3547591A4 (fr) 2017-01-06 2018-01-05 Procédé d'émission ou de réception d'un canal de commande de liaison descendante dans un réseau sans fil de prochaine génération et appareil associé
US16/464,135 US11160051B2 (en) 2017-01-06 2018-01-05 Method for transmitting or receiving downlink control channel in next generation wireless network and apparatus therefor
CN201880004512.1A CN110024323B (zh) 2017-01-06 2018-01-05 在nr中发送或接收下行链路控制信道的方法及其装置

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KR20170002589 2017-01-06
KR10-2017-0002589 2017-01-06
KR10-2017-0066632 2017-05-30
KR1020170066632A KR20180081669A (ko) 2017-01-06 2017-05-30 차세대 무선 액세스망을 위한 공용 제어 정보 전송 방법 및 장치
KR10-2018-0001157 2018-01-04
KR1020180001157A KR102114096B1 (ko) 2017-01-06 2018-01-04 차세대 무선망에서 하향 링크 제어 채널을 송수신하는 방법 및 그 장치

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