WO2018093162A1 - Procédé et appareil d'émission et de réception de signal de liaison descendante dans un réseau sans fil de prochaine génération - Google Patents

Procédé et appareil d'émission et de réception de signal de liaison descendante dans un réseau sans fil de prochaine génération Download PDF

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Publication number
WO2018093162A1
WO2018093162A1 PCT/KR2017/012992 KR2017012992W WO2018093162A1 WO 2018093162 A1 WO2018093162 A1 WO 2018093162A1 KR 2017012992 W KR2017012992 W KR 2017012992W WO 2018093162 A1 WO2018093162 A1 WO 2018093162A1
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Prior art keywords
information
downlink
terminal
service
providing
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PCT/KR2017/012992
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English (en)
Korean (ko)
Inventor
박규진
최우진
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주식회사 케이티
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Priority claimed from KR1020170151983A external-priority patent/KR102156668B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to CN201780069729.6A priority Critical patent/CN109937600B/zh
Priority to CN202310688635.4A priority patent/CN116709539A/zh
Priority to US16/349,874 priority patent/US11405942B2/en
Publication of WO2018093162A1 publication Critical patent/WO2018093162A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies

Definitions

  • the present invention is directed to supporting efficient multiplexing between data traffic having different QoS requirements in a next generation / 5G wireless access network (hereinafter referred to as "NR"), which has been discussed in 3GPP.
  • NR next generation / 5G wireless access network
  • the present invention relates to a method and apparatus for transmitting and receiving link signals.
  • 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
  • An object of the present embodiments is to provide a concrete scheme for providing each service to a plurality of terminals by efficiently allocating limited radio resources in a situation where each service scenario is mixed.
  • a method for receiving a downlink signal by a terminal includes receiving configuration information for receiving downlink preemption information from a base station and performing downlink based on the configuration information. Monitoring link preemption information and receiving downlink preemption information through a multicast or unicast signal, wherein the downlink preemption information includes a radio resource for providing a first service and a second service; Provided is a method including information for indicating an overlapping radio resource of a radio resource for providing.
  • a method for transmitting a downlink signal by a base station includes configuring configuration information for monitoring downlink preemption information, transmitting configuration information to a terminal, and based on the configuration information. And transmitting the preemptive indication information through a multicast or unicast signal, wherein the downlink preemptive indication information includes overlapping radio resources of radio resources for providing a first service and radio resources for providing a second service. It provides a method including information for indicating.
  • an embodiment includes a terminal for receiving a downlink signal, a receiver for receiving configuration information for receiving downlink preemption information from a base station, and a control unit for monitoring downlink preemption information based on the configuration information.
  • the receiving unit receives the downlink preemption information through a multicast or unicast signal, the downlink preemption information is overlapping radio resources for providing a first service and radio resources for providing a second service Provided is a terminal including information for indicating a resource.
  • a base station transmitting a downlink signal transmits a control unit and setting information constituting setting information for monitoring downlink preemption indication information to a terminal, and based on the setting information, downlink preemption indication information. It includes a transmitter for transmitting through a multicast or unicast signal, the downlink preemption indication information for indicating a radio resource overlapping a radio resource for providing a first service and a radio resource for providing a second service Provides a base station that contains information.
  • each terminal multiplexes radio resources to provide an effect of preventing unnecessary processing and data loss in receiving downlink data.
  • 1 is a diagram illustrating alignment of OFDM symbols in the case of using different subcarrier spacings according to the present embodiments.
  • FIG. 2 is a diagram illustrating a method for transmitting downlink preemption information to a terminal through a pre-notification or post-notification method according to the embodiments.
  • 3 is a diagram illustrating radio resource multiplexing for different services according to an embodiment.
  • FIG. 4 is a diagram illustrating radio resource multiplexing for different services according to another embodiment.
  • FIG. 5 is a diagram illustrating an operation of a terminal according to an exemplary embodiment.
  • FIG. 6 is a diagram illustrating an operation of a base station according to an exemplary embodiment.
  • FIG. 7 is a diagram illustrating a configuration of a terminal according to an embodiment.
  • FIG. 8 is a diagram illustrating a configuration of a base station according to an embodiment.
  • 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.
  • Subcarrier spacing (e.g., larger subcarrier spacing such as 60kHz, 120kHz, etc.) Supports mixed numerology structures that support numerology of subcarrier spacing (eg 15kHz for eMBB or 3.75kHz for mMTC) suitable for eMBB and mMTC through one NR carrier Or time-division scheduling units having different lengths, such as subframes or slots or mini-slots, within an NR carrier operating with any one numerology. -domain scheduling unit) must be supported at the same time.
  • numerology of subcarrier spacing e.g 15kHz for eMBB or 3.75kHz for mMTC
  • time-division scheduling units having different lengths, such as subframes or slots or mini-slots, within an NR carrier operating with any one numerology.
  • -domain scheduling unit must be supported at the same time.
  • resource allocation may be performed using time / frequency resources of a region corresponding to a usage scenario for each terminal.
  • the efficiency in terms of the NR system may be somewhat reduced.
  • a time / frequency resource that always supports a short time-domain scheduling unit to satisfy that rarely occurring URLLC service in any NR cell where URLLC traffic is sparse. Dedicating a time / frequency resource may be undesirable.
  • the NR punctures some OFDM symbols among resources allocated for a data channel of any eMBB or mMTC and uses dynamic puncturing-based eMBB / URLLC multiplexing for urgent URLLC data transmission and reception. multiplexing) can be considered. That is, a scheme of supporting preemption based scheduling in URLLC data transmission and reception may be considered.
  • the embodiments described below may be applied to a terminal, a base station, and a core network entity (MME) using all mobile communication technologies.
  • MME core network entity
  • 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.
  • URLLC refers to a service that supports high reliability and low latency, and refers to a service that is used when a serious problem occurs when a delay occurs in the data transmission / reception process although the size of data transmitted / received is not large. Can be.
  • the URLLC service may be used when a delay in data transmission and reception, such as an autonomous vehicle, may cause human / physical damage due to a traffic accident.
  • the eMBB uses a service that supports data transmission at a high speed and may mean a service used when a large amount of data needs to be transmitted and received. For example, if a large amount of data need to be transmitted per unit time such as 3D video or UHD service, the eMBB service may be used.
  • the mMTC may refer to a service used when the size of data transmitted and received is not large and delay does not matter, but low power consumption is needed.
  • sensor devices installed to build a smart city can use the mMTC service because it needs to operate for as long as possible with an onboard battery.
  • one of the three services of URLLC / eMBB / mMTC described above may be serviced to the terminal according to the characteristics of the terminal.
  • a terminal using URLLC service may be referred to as a URLLC terminal, a terminal using eMBB service, an eMBB terminal, and a terminal using mMTC service.
  • eMBB, mMTC, URLLC can also be interpreted as eMBB terminal, mMTC terminal, URLLC terminal, respectively.
  • preemption means reassigning a part of resources allocated to eMMB or mMTC to URLLC in order to satisfy a latency requirement for URLLC when traffic for URLLC occurs.
  • the eMBB terminal or the mMTC terminal to which the original resources have been allocated should receive information on which resources are preempted.
  • Downlink preemption means that preemption of downlink resources of the UE occurs.
  • the downlink preemption indication information is information for indicating to the terminal which data channel (or radio resource) is preempted in the downlink, and the downlink preemption information is information indicating the downlink preemption to the terminal. It can also be expressed as The downlink preemption information can be indicated in the form of a signal or channel.
  • the eMBB terminal and the URLLC terminal in the present specification to apply the concepts currently discussed in the current 3GPP, the specific classification of this is as follows: whether or not to perform monitoring on the dynamic puncturing notification (dynamic puncturing notification) information as follows: It may be determined by the length of the inter scheduling unit.
  • a terminal requiring monitoring of notification information (or channel) for dynamic puncturing corresponds to an eMBB terminal, and the terminal does not need monitoring. May correspond to a URLLC terminal.
  • the distinction between the eMBB terminal and the URLLC terminal may be determined by a subcarrier spacing (SCS) value set for the terminal and a time interval scheduling unit (eg, slot, aggregated slot, mini-slot, etc.) allocated for the terminal.
  • SCS subcarrier spacing
  • a time interval scheduling unit eg, slot, aggregated slot, mini-slot, etc.
  • a terminal having a slot unit of a specific SCS value or a long time duration scheduling unit of an aggregate-slot unit is an eMBB terminal, and has a transmission neuron of a specific SCS value or a specific SCS value or less.
  • the terminal having a short time duration scheduling unit of a mini-slot unit may be a URLLC terminal.
  • a terminal defining a reference value (eg, X ms) value of a time interval scheduling unit (or interval) for distinguishing eMBB and URLLC and having a time interval scheduling unit larger than the corresponding threshold value may correspond to an eMBB terminal corresponding reference value (
  • the terminal having a time interval scheduling unit smaller than the threshold may be a URLLC terminal.
  • FIG. 2 is a diagram illustrating a method for transmitting downlink preemption information to a terminal through a pre-notification or post-notification method according to the embodiments.
  • the horizontal axis represents TTI for eMBB UEs (TTIs) for the eMMB terminal as time base resources
  • the vertical axis represents NR carriers as frequency axis resources.
  • a downlink control channel (PDCCH) is transmitted for an eMMB terminal, and the downlink control channel includes scheduling information about a downlink data channel (PDSCH) for the eMBB terminal.
  • PDCH downlink control channel
  • PDSCH downlink data channel
  • And 2) shows an area in which the aforementioned downlink data channel is transmitted to the eMBB terminal.
  • And 3) indicates an area for transmitting a downlink control channel (PDCCH) or a downlink data channel (PDSCH) through a resource preempted by the URLLC terminal when downlink preemption occurs.
  • the eMBB terminal needs to monitor information indicating that the resource is preempted by the URLLC terminal, that is, downlink preemption information, so that the eMBB terminal can recognize the downlink preemption and respond to it.
  • downlink preemption information is transmitted to the eMBB terminal before the preemption occurs in the area of 4).
  • downlink preemption information is transmitted to the eMBB terminal after the area of 5), that is, preemption occurs.
  • 3 is a diagram illustrating radio resource multiplexing for different services according to an embodiment.
  • the radio resources for eMBB and the radio resources for URLLC may be set to have different subcarrier spacing and symbol length.
  • the subcarrier spacing for URLLC may be set to three times the subcarrier spacing for eMBB, and the symbol length may be set to 1/3.
  • radio resources for eMBB and URLLC are multiplexed, it may be set as shown in FIG. 3.
  • FIG. 4 is a diagram illustrating radio resource multiplexing for different services according to another embodiment.
  • the subcarrier spacing and the symbol length for the eMBB and the URLLC may be set to be the same. Even in this case, as shown in FIG. 4, radio resources for eMBB and URLLC may be multiplexed.
  • FIG. 5 is a diagram illustrating an operation of a terminal according to an exemplary embodiment.
  • the terminal may perform receiving the configuration information for receiving the downlink preemption information from the base station (S510).
  • the terminal may receive configuration information for monitoring downlink preemption information.
  • the configuration information may be received through cell specific signaling or terminal specific signaling.
  • the configuration information may be received through terminal specific RRC signaling.
  • the configuration information may be received through cell specific RRC signaling.
  • the configuration information may be received through the terminal group common signaling.
  • the configuration information may include at least one of subcarrier spacing, duration information, frequency resource information, cell specific RNTI, and slot index. Through this, the terminal may identify resources for receiving downlink preemption information implicitly.
  • the terminal may perform the step of monitoring the downlink preemption indication information based on the configuration information (S520). For example, the terminal may identify radio resources for which the terminal should monitor using the setting information. For example, the terminal may monitor the downlink control channel. Specifically, the terminal may monitor the common search space or the group common search space of the downlink control channel. Alternatively, the terminal may monitor the terminal specific search space of the downlink control channel.
  • the terminal may perform monitoring by a blind decoding method.
  • the UE may perform monitoring by performing CRC scrambling of downlink control information including downlink preemption indication information using a cell specific RNTI.
  • the cell specific RNTI may be set through cell specific higher layer signaling or may be preset to an arbitrary value.
  • the UE may perform monitoring by performing CRC scrambling of downlink control information including downlink preemption indication information using a C-RNTI or a newly defined RNTI.
  • the C-RNTI or the newly defined RNTI may be received through UE specific RRC signaling.
  • the UE may include receiving downlink preemption information through a multicast or unicast signal (S530).
  • the downlink preemption indication information may include information for indicating a radio resource overlapping a radio resource for providing a first service and a radio resource for providing a second service.
  • the downlink preemption indication information may include information for indicating a radio resource set for a predetermined specific service (eg, URLLC).
  • the downlink preemption indication information may be received through a common search space or a group common search space of a downlink control channel. That is, downlink preemption information may be received through cell specific signaling. As another example, the downlink preemption information may be received through a terminal specific search space of a downlink control channel. That is, downlink preemption information may be received through UE specific signaling.
  • the terminal may receive the downlink preemption indication information and recognize that the radio resource indicated by the downlink preemption indication information is a resource temporarily allocated for a specific service.
  • the terminal described above may be an eMBB terminal, and a terminal for which radio resources are indicated through downlink preemption indication information may be a URLLC terminal.
  • the first service may be eMBB
  • the second service may be URLLC
  • the first service may be URLLC
  • the second service may be eMBB.
  • FIG. 6 is a diagram illustrating an operation of a base station according to an exemplary embodiment.
  • the base station may perform step of configuring configuration information for monitoring downlink preemption information (S610).
  • the configuration information may include information necessary for the terminal to monitor the downlink preemption information.
  • the configuration information may include at least one of subcarrier spacing, duration information, frequency resource information, cell specific RNTI, and slot index. Through this, the terminal may identify resources for receiving downlink preemption information implicitly.
  • the base station may perform the step of transmitting the configuration information to the terminal (S620).
  • the configuration information may be transmitted through cell specific signaling or terminal specific signaling.
  • the configuration information may be transmitted through UE specific RRC signaling.
  • the configuration information may be transmitted through cell specific RRC signaling.
  • configuration information may be transmitted through UE group common signaling.
  • the base station may perform the step of transmitting downlink preemption information through a multicast or unicast signal based on the configuration information (S630).
  • the downlink preemption indication information may include information for indicating a radio resource overlapping a radio resource for providing a first service and a radio resource for providing a second service.
  • the downlink preemption indication information may include information for indicating a radio resource set for a predetermined specific service (eg, URLLC).
  • the downlink preemption information may be transmitted through a common search space or a group common search space of a downlink control channel. That is, downlink preemption information may be transmitted through cell specific signaling.
  • the downlink preemption information may be transmitted through a UE specific search space of a downlink control channel. That is, downlink preemption information may be transmitted through UE specific signaling.
  • the terminal may receive the downlink preemption indication information and recognize that the radio resource indicated by the downlink preemption indication information is a resource temporarily allocated for a specific service.
  • the terminal receives downlink preemption information including information indicating radio resources for a specific service, and the base station can multiplex and provide various services by dynamically configuring radio resources.
  • the notification method and the following notification method are divided and described, and the operation of transmitting and receiving setting information will be described by dividing the embodiment.
  • the eMBB terminal will be described based on an operation of receiving downlink preemption information on URLLC radio resources, but is not limited thereto.
  • Any NR cell / base station is a resource or eMBB that punctures eMBB data for URLLC data transmission in any time-scheduling scheduling unit (eg, slot or aggregated-slot) defined for the eMBB terminal. And cell-specific transmission of notification information (downlink preemption indication information described above) for a resource where superposition of the URLLC downlink data is performed.
  • the base station may transmit the downlink preemption indication information to the UE common or the UE group common.
  • the corresponding slot when applying pre-notification or post-notification
  • resource information used for URLLC data transmission in a previous slot that is, resource information (for example, downlink preemption indication information) in which data puncturing or URLLC data is overlapped from an eMBB terminal perspective
  • the BS may broadcast or multicast through cell-specific or UE common / group-UE common signaling.
  • the common L1 control signaling is performed in a common search space of a downlink control channel (NR PDCCH) in a next generation wireless access network of a corresponding slot.
  • Resource allocation information for downlink (or uplink) URLLC data transmission in a slot that is, resource information (puncturing or superposition) for eMBB data transmission transmitted through any corresponding slot (downlink preemption) Indication information) may be transmitted by the base station to the eMBB terminal in the cell.
  • the corresponding dynamic puncturing signaling is configured to monitor a dynamic puncturing / superposition notification in a corresponding cell (or a corresponding slot).
  • the downlink preemption information can be transmitted to all eMBB terminals).
  • a search space or transmission resource for receiving the downlink preemption indication information is also commonly configured for all eMBB terminals in the cell (or configured to monitor the downlink preemption indication information in the corresponding slot).
  • a cell-specific or UE / group-UE common search space for receiving downlink preemption indication information or a period of a predetermined resource may include subcarrier spacing and slot duration.
  • frequency resource information e.g., sub-band or a (set of) PRB ( s)
  • a cell-specific RNTI or a slot index for receiving corresponding cell-specific downlink preemption information, or cell-specific RRC signaling.
  • Cell-specific RRC signaling can be determined by. Or it may be set in advance.
  • resource allocation information for transmitting URLLC data in a previous slot through a common L1 control signaling of a common search space of an NR PDCCH of an arbitrary slot that is, any corresponding Resource information (downlink preemption indication information), which is punctured or superimposed on the eMBB data transmission transmitted through the slot, may be transmitted to the eMBB terminal in the corresponding cell.
  • a post-notification method is defined after transmitting downlink preemption information in the slot to the last symbol (s) of the corresponding slot, the downlink preemption information in the cell (or in the corresponding slot) is defined.
  • All of the eMBB terminals may be transmitted in common.
  • a search space or a transmission resource for receiving the downlink preemption indication information is also set in the cell (or configured to monitor the downlink preemption indication information in the corresponding slot). It may be configured in common for all eMBB terminals.
  • a cell-specific or UE / terminal group common search space or preset frequency resource information eg, sub- band or a (set of) PRB (s)
  • the CRC of the downlink control information including the downlink preemption indication information is applied.
  • the above-described cell specific RNTI for scrambling may be set through cell-specific higher layer signaling by the base station, or may be preset to an arbitrary value.
  • the downlink preemption indication information may be transmitted to a plurality of terminals or terminals included in a terminal group through cell-specific multicast schemes.
  • Second embodiment Method for indicating UE-specific or slot-specific (or slot-specific) .
  • Any NR cell / base station is a resource for puncturing eMBB data for URLLC data transmission in any time-scheduling scheduling unit (eg, slot or aggregated-slot) defined for the eMBB terminal or eMBB and URLLC downlink.
  • UE-specific transmission of the notification information (downlink preemption indication information) for the resource overlapping the link data can be made.
  • the corresponding slot (pre-notification or post-notification) is applied.
  • the notification is applied or when some of the resources allocated for the data transmission are used for the transmission of the URLLC for the eMBB terminals that have been allocated the downlink data resource in the previous slot (post-notification), this is applicable.
  • Each of the eMBB terminals may be configured to be unicasted through UE-specific signaling.
  • UE-specific downlink control information UE-specific DCI
  • UE-specific search space of a NR PDCCH of a corresponding slot UE-specific search space of a NR PDCCH of a corresponding slot.
  • DCI Information indicating downlinking or puncturing for resources allocated for the corresponding URLLC data transmission may be transmitted together with downlink preemption information.
  • a corresponding search space for receiving UE specific downlink preemption indication information for each terminal is provided.
  • the resource may be defined to transmit specific downlink preemption indication information based on the terminal.
  • a search space or a period of resources for receiving downlink preemption indication information in a corresponding slot is implicitly determined as a function of subcarrier spacing and slot duration, or is defined through terminal definition or cell-specific RRC signaling.
  • the frequency resource information may include an ID (eg, C-RNTI), a slot index, and corresponding eMBB data transmission of the corresponding UE. It may be determined as a function of RB index (eg lowest RB or highest RB index), or may be determined by UE-specific / cell-specific RRC signaling.
  • a received downlink received in a previous slot through UE-specific L1 control signaling of a UE-specific search space of an NR PDCCH of an arbitrary slot Resource information used for transmitting URLLC downlink data among the link data resources and downlink control information indicating whether puncturing or overlapping of the resource allocated for transmission of the corresponding URLLC data may be transmitted.
  • a post-notification method is defined after signaling downlink preemption information in the corresponding slot through symbol (s) at the end of the corresponding slot in which downlink eMBB data is transmitted, downlink preemption indication for this is defined.
  • the information signaling defines a search space or a resource for receiving UE-specific downlink preemption indication information for each UE as in the case of the above-described pre-notification, and based on this, the UE specifies the corresponding downlink preemption indication information. Can be sent.
  • the search space or the frequency resource information eg, sub-band or a (set of) PRB (s)
  • the search space or the frequency resource information for receiving downlink preemption indication information in the corresponding slot is an ID (eg, C-RNTI), a slot index, a RB index (e.g., a lowest RB or a highest RB index) through which eMBB data transmission is performed, or a function such as a UE-specific / cell-specific RRC signaling.
  • the RNTI for CRC scrambling of DCI for the downlink indication information is applied.
  • the base station may reuse the C-RNTI of the terminal or set a separate terminal specific RNTI for this to be transmitted to each terminal through UE-specific RRC signaling.
  • the base station may transmit downlink preemption indication information through terminal specific signaling.
  • the terminal may receive configuration information (eg, the above-described RNTI) for monitoring downlink preemption information through terminal-specific or cell-specific signaling.
  • FIG. 7 is a diagram illustrating a configuration of a terminal according to an embodiment.
  • the terminal 700 includes a receiver 730 for receiving configuration information for receiving downlink preemption information from a base station and a controller 710 for monitoring downlink preemption information based on the configuration information. It may include.
  • the receiving unit 730 receives the downlink preemption information through a multicast or unicast signal, and the downlink preemption information includes radio resources for providing a first service and radio resources for providing a second service. It may include information for indicating the overlapping radio resources. In addition, at least one of a subcarrier spacing and a time period scheduling unit may be differently set for the radio resource for providing the first service and the radio resource for providing the second service. Alternatively, the radio resources for providing the first service and the radio resources for providing the second service may have the same subcarrier spacing and time duration scheduling unit.
  • configuration information may be received through UE-specific RRC signaling, and downlink preemption information may be received through a common search space or a group common search space of a downlink control channel or a downlink control channel. It may be received through the terminal specific search space of the.
  • the receiver 730 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • controller 710 dynamically receives the downlink preemption instruction information according to the present invention and controls the overall operation of the user terminal 700 according to the use of multiplexing radio resources.
  • the transmitter 720 transmits uplink control information, data, and a message to a base station through a corresponding channel.
  • FIG. 8 is a diagram illustrating a configuration of a base station according to an embodiment.
  • the base station 800 transmits the control unit 810 constituting the setting information for monitoring the downlink preemption indication information and the setting information to the terminal, and multiplies the downlink preemption indication information based on the setting information.
  • the transmitter 820 may be transmitted through a cast or unicast signal.
  • the downlink preemption indication information may include information for indicating a radio resource overlapping a radio resource for providing a first service and a radio resource for providing a second service.
  • at least one of a subcarrier spacing and a time period scheduling unit may be differently set for the radio resource for providing the first service and the radio resource for providing the second service.
  • the radio resources for providing the first service and the radio resources for providing the second service may have the same subcarrier spacing and time duration scheduling unit.
  • configuration information may be transmitted through UE-specific RRC signaling, and downlink preemption information is transmitted through a common search space or a group common search space of a downlink control channel or a downlink control channel. It may be transmitted through the terminal specific search space.
  • controller 810 dynamically configures and transmits downlink preemption information according to the present invention, thereby controlling the overall operation of the base station 800 according to multiplexing and using radio resources.
  • the transmitter 820 and the receiver 830 are used to transmit and receive signals, messages, and data necessary for performing the above-described embodiments.

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

Abstract

La présente invention concerne un procédé et un appareil conçus pour émettre et recevoir un signal de liaison descendante afin de prendre en charge un multiplexage efficace entre des trafics de données ayant des exigences de QoS mutuellement différentes dans un réseau d'accès sans fil de prochaine génération ou 5G (nouvelle radio (NR)) pour lequel une discussion a commencé dans le 3GPP. Un procédé d'un terminal recevant un signal de liaison descendante, selon un mode de réalisation, comprend les étapes consistant à : recevoir des données de configuration utilisées pour recevoir des données d'indication de préemption de liaison descendante en provenance d'une station de base; surveiller les données d'indication de préemption de liaison descendante sur la base des données de configuration; et recevoir les données d'indication de préemption de liaison descendante au moyen d'un signal de multidiffusion ou de monodiffusion, les données d'indication de préemption de liaison descendante comprenant des données utilisées pour indiquer la ressource sans fil chevauchante entre une ressource sans fil destinée à fournir un premier service et une ressource sans fil destinée à fournir un second service.
PCT/KR2017/012992 2016-11-16 2017-11-16 Procédé et appareil d'émission et de réception de signal de liaison descendante dans un réseau sans fil de prochaine génération WO2018093162A1 (fr)

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CN201780069729.6A CN109937600B (zh) 2016-11-16 2017-11-16 用于在下一代无线网络中传送和接收下行链路信号的方法和装置
CN202310688635.4A CN116709539A (zh) 2016-11-16 2017-11-16 用于在下一代无线网络中传送和接收下行链路信号的方法和装置
US16/349,874 US11405942B2 (en) 2016-11-16 2017-11-16 Method and apparatus for transmitting and receiving downlink signal in next generation wireless network

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KR10-2016-0152659 2016-11-16
KR20160152659 2016-11-16
KR1020170151983A KR102156668B1 (ko) 2016-11-16 2017-11-15 차세대 무선망에서 하향링크 신호를 송수신하는 방법 및 그 장치
KR10-2017-0151983 2017-11-15

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CN113473605A (zh) * 2020-03-30 2021-10-01 维沃移动通信有限公司 一种冲突资源确定方法和终端

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