WO2018062840A1 - Procédé par lequel un terminal et une station de base de émettent/reçoivent des signaux dans un système de communication sans fil, et dispositif permettant de prendre en charge ce dernier - Google Patents

Procédé par lequel un terminal et une station de base de émettent/reçoivent des signaux dans un système de communication sans fil, et dispositif permettant de prendre en charge ce dernier Download PDF

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Publication number
WO2018062840A1
WO2018062840A1 PCT/KR2017/010706 KR2017010706W WO2018062840A1 WO 2018062840 A1 WO2018062840 A1 WO 2018062840A1 KR 2017010706 W KR2017010706 W KR 2017010706W WO 2018062840 A1 WO2018062840 A1 WO 2018062840A1
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Prior art keywords
numerology
control channel
channel
data channel
downlink control
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PCT/KR2017/010706
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English (en)
Korean (ko)
Inventor
김선욱
양석철
김기준
이윤정
황대성
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엘지전자 주식회사
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Publication of WO2018062840A1 publication Critical patent/WO2018062840A1/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

Definitions

  • the following description relates to a wireless communication system, and a method for transmitting and receiving a signal between a terminal and a base station in a wireless communication system and an apparatus supporting the same.
  • the following description includes a description of a method for transmitting and receiving a control channel and a data channel having a base station or a terminal having independent numerology (eg, subcarrier spacing) and a device supporting the same. do.
  • independent numerology eg, subcarrier spacing
  • Wireless access systems are widely deployed to provide various kinds of communication services such as voice and data.
  • a wireless access system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
  • multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency (SC-FDMA). division multiple access) system.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • Massive Machine Type Communications which connects multiple devices and objects to provide various services anytime, anywhere, is also being considered in next-generation communications.
  • MTC Massive Machine Type Communications
  • a communication system design considering a service / UE that is sensitive to reliability and latency is being considered.
  • An object of the present invention is to provide a method for transmitting and receiving signals between a terminal and a base station and a device supporting the same in a newly proposed communication system.
  • the present invention provides methods and apparatuses for transmitting and receiving signals between a base station and a terminal in a wireless communication system.
  • the present invention provides a method and apparatus for transmitting and receiving a control channel and a data channel to which the independent numerology (eg, subcarrier spacing) is applied in transmitting and receiving a signal between the terminal and the base station.
  • the independent numerology eg, subcarrier spacing
  • a method for transmitting and receiving a signal in a terminal in a wireless communication system comprising: receiving a downlink control channel having a first numerology; And performing a downlink data channel reception or an uplink data channel transmission having a second numerology scheduled by the downlink control channel and independently determined by the first numerology. Suggest.
  • a method for transmitting and receiving a signal of a base station in a wireless communication system comprising: transmitting a downlink control channel having a first numerology; And performing a downlink data channel transmission or an uplink data channel reception having a second numerology independently determined from the first numerology based on the scheduling indicated by the downlink control channel.
  • a terminal for transmitting and receiving a signal with a base station in a wireless communication system comprising: a transmitter; Receiving unit; And a processor operatively coupled to the transmitter and the receiver, the processor comprising: receiving a downlink control channel having a first numerology; And performing a downlink data channel reception or an uplink data channel transmission having a second numerology scheduled by the downlink control channel and independently determined by the first numerology.
  • a base station for transmitting and receiving a signal with a terminal in a wireless communication system, the base station; Receiving unit; And a processor operating in connection with the transmitter and the receiver, the processor comprising: transmitting a downlink control channel having a first numerology; And perform a downlink data channel transmission or an uplink data channel reception having a second numerology independently determined from the first numerology based on the scheduling indicated by the downlink control channel.
  • the first numerology of the downlink control channel and the second numerology of the downlink data channel may be different from each other.
  • the terminal may transmit acknowledgment information for the downlink data channel to the base station.
  • the transmission time of the acknowledgment information may be determined based on the third numerology of the uplink control channel.
  • the first numerology of the downlink control channel and the second numerology of the uplink data channel may be different from each other.
  • a time length between the time point at which the downlink control channel is received and the time point at which the uplink data channel is transmitted may be determined based on the second numerology.
  • a physical downlink control channel (PDCCH) is applied to the downlink control channel
  • a physical downlink shared channel (PDSCH) is applied to the downlink data channel
  • a physical uplink shared channel (PUSCH) is applied to the uplink data channel.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • the first numerology may be set through higher layer signaling
  • the second numerology may be set through higher layer signaling or physical layer signaling according to a data channel scheduled by the downlink control channel.
  • a terminal and a base station may satisfy various service requirements, ensure stable operation in a wide frequency band, and transmit and receive signals.
  • 1 is a diagram illustrating a physical channel and a signal transmission method using the same.
  • FIG. 2 is a diagram illustrating an example of a structure of a radio frame.
  • 3 is a diagram illustrating a resource grid for a downlink slot.
  • FIG. 4 is a diagram illustrating an example of a structure of an uplink subframe.
  • 5 is a diagram illustrating an example of a structure of a downlink subframe.
  • FIG. 6 is a diagram illustrating a self-contained subframe structure applicable to the present invention.
  • FIG. 7 and 8 illustrate exemplary connection schemes of a TXRU and an antenna element.
  • FIG. 9 is a diagram illustrating a configuration in which a subcarrier spacing for a DL use and a subcarrier spacing for a UL use are different from each other according to an example of the present invention.
  • FIG. 10 illustrates a configuration in which each region of DL / UL / GP in a corresponding TTI is set through a combination of an indication indicating a DL region and an indication indicating a UL region for different TTIs according to an embodiment of the present invention. The figure shown.
  • FIG. 11 is a diagram schematically illustrating a frame structure to which asymmetric numerology is applied according to an embodiment of the present invention.
  • FIG. 12 is a diagram illustrating a configuration in which DL TTI and UL TTI are set differently according to an embodiment of the present invention.
  • 13 is a view showing a signal transmission and reception method between the terminal and the base station according to the present invention.
  • FIG. 14 is a diagram illustrating a configuration of a terminal and a base station in which the proposed embodiments can be implemented.
  • each component or feature may be considered to be optional unless otherwise stated.
  • Each component or feature may be embodied in a form that is not combined with other components or features.
  • some of the components and / or features may be combined to form an embodiment of the present invention.
  • the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment, or may be replaced with corresponding components or features of another embodiment.
  • the base station is meant as a terminal node of a network that directly communicates with a mobile station.
  • the specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases.
  • various operations performed for communication with a mobile station in a network consisting of a plurality of network nodes including a base station may be performed by the base station or network nodes other than the base station.
  • the 'base station' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an advanced base station (ABS), or an access point.
  • a terminal may be a user equipment (UE), a mobile station (MS), a subscriber station (SS), or a mobile subscriber station (MSS). It may be replaced with terms such as a mobile terminal or an advanced mobile station (AMS).
  • UE user equipment
  • MS mobile station
  • SS subscriber station
  • MSS mobile subscriber station
  • AMS advanced mobile station
  • the transmitting end refers to a fixed and / or mobile node that provides a data service or a voice service
  • the receiving end refers to a fixed and / or mobile node that receives a data service or a voice service. Therefore, in uplink, a mobile station may be a transmitting end and a base station may be a receiving end. Similarly, in downlink, a mobile station may be a receiving end and a base station may be a transmitting end.
  • Embodiments of the present invention may be supported by standard documents disclosed in at least one of the IEEE 802.xx system, the 3rd Generation Partnership Project (3GPP) system, the 3GPP LTE system, and the 3GPP2 system, which are wireless access systems, and in particular, the present invention.
  • Embodiments of the may be supported by 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.321 and 3GPP TS 36.331 documents. That is, obvious steps or portions not described among the embodiments of the present invention may be described with reference to the above documents.
  • all terms disclosed in the present document can be described by the above standard document.
  • Transmission Opportunity Period may be used in the same meaning as the term transmission period, transmission burst (Tx burst) or RRP (Reserved Resource Period).
  • LBT process may be performed for the same purpose as a carrier sensing process, a clear channel access (CCA), and a channel access procedure (CAP) for determining whether a channel state is idle.
  • CCA clear channel access
  • CAP channel access procedure
  • 3GPP LTE / LTE-A system will be described as an example of a wireless access system in which embodiments of the present invention can be used.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
  • UTRA is part of the Universal Mobile Telecommunications System (UMTS).
  • 3GPP Long Term Evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
  • LTE-A (Advanced) system is an improved system of the 3GPP LTE system.
  • embodiments of the present invention will be described based on the 3GPP LTE / LTE-A system, but can also be applied to IEEE 802.16e / m system and the like.
  • a terminal receives information from a base station through downlink (DL) and transmits information to the base station through uplink (UL).
  • the information transmitted and received by the base station and the terminal includes general data information and various control information, and various physical channels exist according to the type / use of the information they transmit and receive.
  • FIG. 1 is a diagram for explaining physical channels that can be used in embodiments of the present invention and a signal transmission method using the same.
  • the initial cell search operation such as synchronizing with the base station is performed in step S11.
  • the UE receives a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S-SCH) from the base station, synchronizes with the base station, and obtains information such as a cell ID.
  • P-SCH Primary Synchronization Channel
  • S-SCH Secondary Synchronization Channel
  • the terminal may receive a physical broadcast channel (PBCH) signal from the base station to obtain broadcast information in a cell.
  • PBCH physical broadcast channel
  • the terminal may receive a downlink reference signal (DL RS) in the initial cell search step to confirm the downlink channel state.
  • DL RS downlink reference signal
  • the UE After completing the initial cell search, the UE receives a physical downlink control channel (PDCCH) and a physical downlink control channel (PDSCH) according to the physical downlink control channel information in step S12. Specific system information can be obtained.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink control channel
  • the terminal may perform a random access procedure as in steps S13 to S16 to complete the access to the base station.
  • the UE transmits a preamble through a physical random access channel (PRACH) (S13), a response message to the preamble through a physical downlink control channel and a corresponding physical downlink shared channel. Can be received (S14).
  • PRACH physical random access channel
  • the UE may perform contention resolution such as transmitting an additional physical random access channel signal (S15) and receiving a physical downlink control channel signal and a corresponding physical downlink shared channel signal (S16). Procedure).
  • the UE After performing the above-described procedure, the UE subsequently receives a physical downlink control channel signal and / or a physical downlink shared channel signal (S17) and a physical uplink shared channel (PUSCH) as a general uplink / downlink signal transmission procedure.
  • a transmission (Uplink Shared Channel) signal and / or a Physical Uplink Control Channel (PUCCH) signal may be transmitted (S18).
  • UCI uplink control information
  • HARQ-ACK / NACK Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK
  • SR Scheduling Request
  • CQI Channel Quality Indication
  • PMI Precoding Matrix Indication
  • RI Rank Indication
  • UCI is generally transmitted periodically through the PUCCH, but may be transmitted through the PUSCH when control information and traffic data should be transmitted at the same time.
  • the UCI may be aperiodically transmitted through the PUSCH by the request / instruction of the network.
  • FIG. 2 shows a structure of a radio frame used in embodiments of the present invention.
  • the type 1 frame structure can be applied to both full duplex Frequency Division Duplex (FDD) systems and half duplex FDD systems.
  • FDD Frequency Division Duplex
  • One subframe is defined as two consecutive slots, and the i-th subframe includes slots corresponding to 2i and 2i + 1. That is, a radio frame consists of 10 subframes.
  • the time taken to transmit one subframe is called a transmission time interval (TTI).
  • the slot includes a plurality of OFDM symbols or SC-FDMA symbols in the time domain and a plurality of resource blocks in the frequency domain.
  • One slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain. Since 3GPP LTE uses OFDMA in downlink, the OFDM symbol is for representing one symbol period. The OFDM symbol may be referred to as one SC-FDMA symbol or symbol period.
  • a resource block is a resource allocation unit and includes a plurality of consecutive subcarriers in one slot.
  • 10 subframes may be used simultaneously for downlink transmission and uplink transmission during each 10ms period. At this time, uplink and downlink transmission are separated in the frequency domain.
  • the terminal cannot transmit and receive at the same time.
  • the structure of the radio frame described above is just one example, and the number of subframes included in the radio frame, the number of slots included in the subframe, and the number of OFDM symbols included in the slot may be variously changed.
  • the type 2 frame includes a special subframe consisting of three fields: a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS).
  • DwPTS downlink pilot time slot
  • GP guard period
  • UpPTS uplink pilot time slot
  • the DwPTS is used for initial cell search, synchronization or channel estimation in the terminal.
  • UpPTS is used for channel estimation at the base station and synchronization of uplink transmission of the terminal.
  • the guard period is a period for removing interference generated in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.
  • Table 1 below shows the structure of the special frame (length of DwPTS / GP / UpPTS).
  • FIG. 3 is a diagram illustrating a resource grid for a downlink slot that can be used in embodiments of the present invention.
  • one downlink slot includes a plurality of OFDM symbols in the time domain.
  • one downlink slot includes seven OFDM symbols, and one resource block includes 12 subcarriers in a frequency domain, but is not limited thereto.
  • Each element on the resource grid is a resource element, and one resource block includes 12 ⁇ 7 resource elements.
  • the number NDL of resource blocks included in the downlink slot depends on the downlink transmission bandwidth.
  • the structure of the uplink slot may be the same as the structure of the downlink slot.
  • FIG. 4 shows a structure of an uplink subframe that can be used in embodiments of the present invention.
  • an uplink subframe may be divided into a control region and a data region in the frequency domain.
  • the control region is allocated a PUCCH carrying uplink control information.
  • a PUSCH carrying user data is allocated.
  • one UE does not simultaneously transmit a PUCCH and a PUSCH.
  • the PUCCH for one UE is allocated an RB pair in a subframe. RBs belonging to the RB pair occupy different subcarriers in each of the two slots.
  • the RB pair assigned to this PUCCH is said to be frequency hopping at the slot boundary.
  • FIG. 5 shows a structure of a downlink subframe that can be used in embodiments of the present invention.
  • up to three OFDM symbols from the OFDM symbol index 0 in the first slot in the subframe are control regions to which control channels are allocated, and the remaining OFDM symbols are data regions to which the PDSCH is allocated. to be.
  • a downlink control channel used in 3GPP LTE includes a Physical Control Format Indicator Channel (PCFICH), a PDCCH, and a Physical Hybrid-ARQ Indicator Channel (PHICH).
  • PCFICH Physical Control Format Indicator Channel
  • PDCCH Physical Hybrid-ARQ Indicator Channel
  • PHICH Physical Hybrid-ARQ Indicator Channel
  • the PCFICH is transmitted in the first OFDM symbol of a subframe and carries information about the number of OFDM symbols (ie, the size of the control region) used for transmission of control channels within the subframe.
  • the PHICH is a response channel for the uplink and carries an ACK (Acknowledgement) / NACK (Negative-Acknowledgement) signal for a hybrid automatic repeat request (HARQ).
  • Control information transmitted through the PDCCH is called downlink control information (DCI).
  • the downlink control information includes uplink resource allocation information, downlink resource allocation information or an uplink transmission (Tx) power control command for a certain terminal group.
  • New wireless access technology New Radio Access Technology
  • MTC Massive Machine Type Communications
  • FIG. 6 is a diagram illustrating a self-contained subframe structure applicable to the present invention.
  • an independent subframe structure as shown in FIG. 6 is proposed to minimize data transmission delay in a TDD system.
  • the feature of this structure is to sequentially perform DL transmission and UL transmission in one subframe, and can also transmit and receive DL data and UL ACK / NACK for this in one subframe. As a result, this structure reduces the time taken to retransmit data in the event of a data transmission error, thereby minimizing the delay of the final data transfer.
  • a time gap is required for a base station and a UE to switch from a transmission mode to a reception mode or to switch from a reception mode to a transmission mode.
  • some OFDM symbols at the time of switching from DL to UL in an independent subframe structure may be set to a guard period (GP).
  • the self-contained subframe structure includes a case in which both the DL control region and the UL control region are included.
  • the control regions may be selectively included in the independent subframe structure.
  • the independent subframe structure according to the present invention may include not only a case in which both the DL control region and the UL control region are included as shown in FIG. 6, but also a case in which only the DL control region or the UL control region is included.
  • the above-described frame structure is collectively referred to as a subframe, but a corresponding configuration may be named as a frame or a slot.
  • a frame or a slot For example, in an NR system, one unit composed of a plurality of symbols may be called a slot, and in the following description, a subframe or a frame may be replaced with the slot described above.
  • the NR system uses an OFDM transmission scheme or a similar transmission scheme.
  • the NR system may have an OFDM numerology as shown in Table 2.
  • the NR system uses an OFDM transmission scheme or a similar transmission scheme and may use an OFDM numerology selected from a plurality of OFDM numerologies as shown in Table 3. Specifically, as disclosed in Table 3, the NR system is based on the 15kHz subcarrier spacing used in the LTE system (OF subcarrier spacing) OFDM numerology with 30, 60, 120 kHz subcarrier spacing in a multiple of the 15kHz subcarrier spacing Can be used.
  • OF subcarrier spacing OFDM numerology with 30, 60, 120 kHz subcarrier spacing in a multiple of the 15kHz subcarrier spacing Can be used.
  • the cyclic prefix, the system bandwidth (System BW), and the number of available subcarriers available in Table 3 are just examples applicable to the NR system according to the present invention. Values can be modified. Representatively, in case of 60kHz subcarrier spacing, the system bandwidth may be set to 100MHz, and in this case, the number of available subcarriers may exceed 1500 and have a value less than 1666.
  • the subframe length and the number of OFDM symbols per subframe disclosed in Table 4 are also just examples applicable to the NR system according to the present invention, and the values may be modified according to an implementation scheme.
  • millimeter wave the short wavelength allows the installation of multiple antenna elements in the same area. That is, since the wavelength is 1 cm in the 30 GHz band, a total of 100 antenna elements can be installed in a 2-dimension array at 0.5 lambda intervals on a 5 * 5 cm panel. Accordingly, in millimeter wave (mmW), a plurality of antenna elements may be used to increase beamforming (BF) gain to increase coverage or to increase throughput.
  • BF beamforming
  • each antenna element may include a TXRU (Transceiver Unit) to enable transmission power and phase adjustment for each antenna element.
  • TXRU Transceiver Unit
  • each antenna element may perform independent beamforming for each frequency resource.
  • hybrid beamforming having B TXRUs which is smaller than Q antenna elements, may be considered as an intermediate form between digital beamforming and analog beamforming.
  • the direction of the beam that can be transmitted at the same time may be limited to B or less.
  • the TXRU virtualization model represents the relationship between the output signal of the TXRU and the output signal of the antenna element.
  • FIG. 7 is a diagram illustrating how a TXRU is connected to a sub-array. In the case of FIG. 7, the antenna element is connected to only one TXRU.
  • FIG. 8 shows how TXRU is connected to all antenna elements.
  • the antenna element is connected to all TXRUs.
  • the antenna element requires a separate adder as shown in FIG. 15 to be connected to all TXRUs.
  • W represents the phase vector multiplied by an analog phase shifter.
  • W is a main parameter that determines the direction of analog beamforming.
  • the mapping between the CSI-RS antenna port and the TXRUs may be 1: 1 or 1: 1-to-many.
  • the beamforming focusing is difficult, but there is an advantage that the entire antenna configuration can be configured at a low cost.
  • the transmission time interval (TTI) or subcarrier spacing between the DL signal and the UL signal is different, or a control channel and data
  • TTI transmission time interval
  • subcarrier spacing between data channels is different, or a control channel and data
  • a transmission time interval is defined as a minimum time interval for delivering MAC protocol data units (PDUs) to a PHY layer in a medium access control (MAC) layer.
  • PDUs MAC protocol data units
  • MAC medium access control
  • the UE since the UE may receive DL data or receive UL data transmission at a TTI interval, the UE should attempt to receive a DL control channel carrying DL data or scheduling information for at least TTI.
  • the TTI was defined equal to 1 subframe (SF), that is, 1 ms.
  • TTIs of various sizes can be applied in NR systems to which the present invention is applicable.
  • TTI defined in a time domain less than 1 ms (eg 7 symbols or 2 symbols)
  • LTE Release-14 system discussed at a similar time as the NR system.
  • Different UEs have different coverages, different traffic volumes, or use cases (eg, Enhanced Mobile BroadBand (eMBB) or Ultra Reliable and Low Latency Communication (URLLC), etc.) This is because the requirements may vary.
  • eMBB Enhanced Mobile BroadBand
  • URLLC Ultra Reliable and Low Latency Communication
  • the introduction of several subcarrier spacings is considered to satisfy various service requirements and to ensure stable operation in a wide frequency band.
  • the present invention will be described in detail with reference to a frame structure and a control / data channel transmission / reception method when the TTI or subcarrier spacing between the DL signal and the UL signal is different or the subcarrier spacing between the control channel and the data channel is different.
  • Cyclic Prefix may be needed to reduce inter-symbol interference from the viewpoint of an eNB that simultaneously receives UL transmissions of different UEs (using frequency resources or spatial resources).
  • CP Cyclic Prefix
  • the UL required CP transmission for the UL transmission is longer than the CP required for the DL reception. You may need a CP for.
  • the same subcarrier spacing may be applied, but a normal CP may be supported for DL and an extended CP may be supported for UL.
  • the CP length is set to be the same, but the subcarrier spacing for DL use may be set larger than the subcarrier spacing for UL use.
  • the second example described above may be more preferable in terms of general CP overhead.
  • the subcarrier spacing of the control channel may be set larger than the subcarrier spacing of the data channel.
  • the maximum modulation and coding scheme (MCS) is set to be considerably lower than that of the data channel, so that even if the subcarrier spacing and the CP length of the control channel are increased, a certain level of reliability can still be guaranteed in an interference situation.
  • the above configuration has an advantage in that the control channel can be transmitted in various directions by increasing the number of symbols of the control channel.
  • the subcarrier spacing for the control channel may be set to be larger than the subcarrier spacing of the data channel.
  • the subcarrier spacing of the control channel may be set smaller than the subcarrier spacing of the data channel.
  • the symbol length of the control channel may be set longer than the symbol length of the data channel.
  • the control channel can be transmitted using a higher transmission energy than the data channel. According to such a configuration, the base station can extend cell coverage, and the control channel can be transmitted more stably and reliably than the data channel.
  • FIG. 9 is a diagram illustrating a configuration in which a subcarrier spacing for a DL use and a subcarrier spacing for a UL use are different from each other according to an example of the present invention.
  • a subcarrier spacing (eg, 30 kHz) for DL use may be set larger than a subcarrier spacing (eg, 15 kHz) for UL use within the same TTI.
  • the subcarrier spacing (eg, 30 kHz) of the control channel may be set to be larger than the subcarrier spacing (eg, 15 kHz) of the data channel.
  • a guard period may exist between the DL (control) region and the UL (data) region.
  • a reference numerology (eg, subcarrier spacing) that sets the starting point (and / or interval) of a specific GP may be set based on the numerology of the DL (control) region (or UL (data) region).
  • the reference numerology for setting the starting point (and / or interval) of the specific GP is set based on the numerology having the maximum (or minimum) subcarrier spacing among the numerology of the DL (control) region and the numerology of the UL (data) region.
  • the reference numerology for setting the starting point (and / or interval) of the specific GP may be set in advance or the reference numerology set by higher layer signaling or first layer signaling.
  • the start point (and / or interval) of the GP is set based on the subcarrier spacing of the DL control region, which means that the candidate for the start point of the GP may be one of 28 symbols.
  • the interval of the GP may also be set based on granularity of the symbol unit corresponding to the 30 kHz subcarrier spacing.
  • the above method can be equally applied to the case of setting a start point / section of a GP that can exist between the DL data region and the UL control region.
  • the method is based on the reference numerology when the DL assignment (or UL grant) scheduling the DL data (or UL data) informs the start and / or interval and / or end point information of the data The same applies to the case of setting.
  • FIG. 10 illustrates a configuration in which each region of DL / UL / GP in a corresponding TTI is set through a combination of an indication indicating a DL region and an indication indicating a UL region for different TTIs according to an embodiment of the present invention. The figure shown.
  • an indication (or DL scheduling information) indicating a DL region for one TTI (or scheduling unit or mini-slot or slot or subframe).
  • areas of DL / UL / GP (guard period) within a corresponding TTI may be configured through a combination of an indication (or DL scheduling information) indicating an UL area.
  • the indication may be set semi-statically or dynamically by dynamic first layer signaling (eg, L1 signaling).
  • dynamic first layer signaling eg, L1 signaling
  • an area corresponding to the difference (T1 or T3) between the last time point of the DL area and the start time point of the UL area may be set to GP.
  • an area corresponding to the difference (T2 or T4) between the last time point of the UL area and the DL start time point on the next TTI may be set to GP.
  • both the first starting point and the section setting method described above may be applied to both types of GP.
  • the reference numerology e.g. subcarrier spacing
  • the starting point (and / or interval) of the GP corresponding to the difference (T2 or T4) between the end of the UL region and the DL starting point on the next TTI is the numerology of the UL region. It may be set based on.
  • the starting point of the GP may be determined as a relative position with respect to the starting point of the UL data.
  • the start time of the UL data may be signaled in advance by a UL grant (or higher layer signaling) before the corresponding UL data is transmitted (for example, before 4 TTIs).
  • the UE may perform a DL to UL switching time (DL-to) based on the symbol 3 boundary.
  • the starting point of the GP section can be inverted considering the UL switching time and the TA value.
  • the UE may attempt to detect DL control only at symbol 0.
  • the GP region setting may be given priority over DL control region signaling (eg, PCFICH).
  • the above method can be extended even when the numerology between DL / UL or control / data is the same.
  • the GP eg, DL-to-UL switching time and TA value, etc.
  • the UL data transmission may be set to start afterward. At this time, as the most conservative approach, a rule for determining the sum of the maximum length of the DL control and the GP (section) length as a UL data transmission start time may be set.
  • a rule for determining the sum of the minimum length of the DL control and the GP (section) length as a UL data transmission start time may be set. .
  • the sum of the last time point and the GP (section) length of the DL control area may be after the UL data transmission start time, such that the DL control area and / or the GP period. Puncturing (or rate matching) may be set to be applied to the UL data portion overlapping with.
  • the position of the DM-RS is the nearest symbol (or later symbol) after the time point corresponding to the sum of the maximum length of the DL control region and the GP (section) length. It can be set to.
  • the sum of the last time point and the GP (section) length of the DL control region may be after the start time of the signaled UL data transmission.
  • puncturing or rate matching
  • the corresponding DM-RS can be punctured, and the position of the DM-RS is determined by the maximum length of the DL control area and the GP (section) length. It may be set to the nearest symbol (or later symbol) after the time point corresponding to the sum.
  • the above method can be extended even when the numerology between DL / UL or control / data is the same.
  • the start point and the interval of the GP may be determined by the end point of the DL data region and / or the start point of the UL control region.
  • the UE may regard the end point of the DL data as a start point of the GP.
  • the UE if the UE is instructed to transmit the UL control region and / or start time of the UL control region with respect to a specific TTI, the UE considers a DL-to-UL switching time and a TA value, etc. To invert the starting point of the GP section. In this case, when the start point of the inverted GP section is earlier than the end point of the DL data region, a rule may be set such that the UE does not receive DL data from the start point of the inverted GP section.
  • the above method can be extended even when the numerology between DL / UL or control / data is the same.
  • the GP may also exist in the region between the DL data region and the UL data region or in the region between the DL control region and the UL control region.
  • the start point (and section) of the GP is the end point of the preceding (data / control) area or the trailing (data / control) area as in the above-described second or third start point and section setting method. It may be set to be determined based on the starting time point.
  • the region used as a reference for determining the GP interval may be determined by higher layer signaling or dynamic signaling.
  • the DL data area may be guaranteed and the GP period may be set.
  • the UL data area may be guaranteed and the GP period may be set.
  • the numerology of the DL control channel must be set at least in advance so that initial access or the like of the UE can be performed smoothly.
  • the numerology of the DL control channel may be predefined according to the frequency band, set equal to the numerology of the synchronization signal, or set by MIB or SIB or RRC signaling.
  • the numerology of the DL data channel is then set equal to the numerology of the established DL control channel, or predefined according to the frequency band of the DL data channel, or equally set to the numerology of the synchronization signal, MIB or SIB or RRC signaling. Or the like.
  • the numerology of the UL control channel may be set similarly to the numerology of the DL data channel, but may be dynamically indicated by DCI (eg, DL assignment) or the like.
  • the numerology of the UL data channel may be set similarly to the numerology of the DL data channel, but may be dynamically indicated by DCI (eg, UL grant) or the like.
  • the numerology of the UL control channel may be set differently depending on the symbol position and / or transmission format in which the UL control channel is transmitted. For example, when a UL control channel is transmitted in the last symbol, a 30 kHz subcarrier spacing may be set for the UL control channel, and in another case, a 15 kHz subcarrier spacing may be set for the UL control channel. As another example, when the UL control channel is transmitted in the form of a single symbol PUCCH, a 30 kHz subcarrier interval is set for the UL control channel, and the UL control channel is a multi-symbol PUCCH. When transmitted in the form of a PUCCH, a 15 kHz subcarrier spacing may be set for the UL control channel.
  • the DL data or UL data may be scheduled in one subframe / slot / mini-slot or different subframes / slots / mini-slots. Can be scheduled across (cross-subframe / slot / mini-slot).
  • a DCI scheduling DL data (or UL data) is transmitted in subframe / slot / mini-slot #n, and a field indicating a scheduling delay on the DCI is subframe / slot / mini-slot #.
  • n + k indicates that DL data (or UL data) is scheduled.
  • the UE may interpret the k value as follows according to an embodiment.
  • the UE may interpret the k value based on the numerology of the scheduled data. Alternatively, the UE may interpret the numerology of the DCI scheduling the k value.
  • k having the value of 4 is 4 subframes after 2 ms (based on 30 kHz numerology), and Based on 15 kHz numerology).
  • This method may also be applied when determining a timeline for HARQ-ACK transmission corresponding to a DL data channel. That is, when the DL data channel is transmitted in subframe / slot / mini-slot #n and the HARQ-ACK information corresponding to the DL data channel is set to be transmitted in subframe / slot / mini-slot # n + k, the The k value may be interpreted based on the numerology of the DL data channel or the numerology of the UL control channel.
  • the various scheduling methods described above may be equally applied to self / cross carrier scheduling.
  • a configuration in which independent numerology is applied to each DL / UL or data / control channel as described above may be equally applied to cross carrier scheduling as well as to self carrier scheduling.
  • FIG. 11 is a diagram schematically illustrating a frame structure to which asymmetric numerology is applied according to an embodiment of the present invention.
  • the UE may receive a DL control channel at a subcarrier interval of 30 kHz on Sym0 and a DL data channel at a subcarrier interval of 15 kHz on Sym1 to Sym5.
  • some frequency resources not used for reception of the DL control channel on Sym0 may also be allocated for DL data channel purposes.
  • a method of setting a subcarrier spacing of a DL data channel scheduled on Sym0 will be described in detail as described above.
  • the UE may transmit a UL control channel at a subcarrier interval of 30 kHz on Sym13 and a UL data channel at a subcarrier interval of 15 kHz on Sym7 to Sym12.
  • some frequency resources that are not used for transmission of the UL control channel on Sym13 may also be allocated for use of the UL data channel.
  • a method of setting a subcarrier spacing of a UL data channel scheduled on Sym13 will be described in detail as described above.
  • the UE transmits (or receives) both a data channel and a control channel in the same symbol region, the UE transmits (or receives) the data channel and control channel in the same subcarrier interval
  • the UE transmits a UL data channel at subcarrier intervals of 15 kHz on Sym7 to Sym12. Subsequently, when the UE transmits both the UL control channel and the UL data channel on Sym13, a rule may be set such that the UE transmits both channels at a subcarrier interval of 30 kHz.
  • the UE When the UE transmits (or receives) both a data channel and a control channel in the same symbol region, the UE transmits (or receives) at subcarrier intervals respectively set according to UE capability.
  • the UE transmits a UL data channel at subcarrier intervals of 15 kHz on Sym7 to Sym12. Subsequently, when the UE transmits both the UL control channel and the UL data channel on Sym13, the UE transmits the UL control channel at a subcarrier interval of 30 kHz only for simultaneous transmission (or simultaneous reception) capability and 15 kHz.
  • a rule may be set to transmit a UL data channel at subcarrier spacing of.
  • the UE may not expect to receive scheduling information for transmitting (or receiving) both the data channel and the control channel in the same symbol region. Or, if the subcarrier spacing settings of the data channel and the control channel are different, when the UE receives a scheduling for transmitting both the data channel and the control channel in the same symbol region, the data channel (by puncturing or rate-matching) is applied to the symbol.
  • the rule may be set not to transmit.
  • the UE may perform transmission (or reception) of the data channel based on the subcarrier spacing set for the data channel in a symbol in which the control channel does not exist. Or, if the control channel region is set, the UE is configured for the control channel for transmitting (or receiving) the data channel in the symbol in which the control channel region is set or the subcarrier interval set for the control channel (regardless of the subcarrier interval set for the control channel). It may be performed based on the subcarrier spacing set for the data channel. Alternatively, when a control channel region is set, the UE may not expect to receive information for scheduling transmission (or reception) of a data channel in a symbol region in which the control channel region is set. If the UE receives information for scheduling transmission of a data channel in a symbol region in which a control channel region is set, the UE does not transmit a data channel (by applying puncturing or rate-matching) in the corresponding symbol. Can be set.
  • the TTI length for the DL and the TTI length for the UL may be set differently.
  • the UL TTI may be set to be larger (or longer) than the DL TTI to ensure UL coverage of the UL.
  • FIG. 12 is a diagram illustrating a configuration in which DL TTI and UL TTI are set differently according to an embodiment of the present invention.
  • the DL TTI length is assumed to be 1 slot length and the UL TTI length is 2 slot length in FIG. 12, the configuration of the present invention described below may be applied even when the DL TTI is larger than the UL TTI.
  • the UE When the UE monitors a downlink control indicator (DCI) in the DL control channel, the UE may attempt to monitor for the union of the DL TTI and UL TTI periods. More specifically, the UE may perform DCI monitoring according to a shorter TTI.
  • DCI downlink control indicator
  • the UE may attempt to monitor the DCI every slot.
  • the type of DCI that the UE attempts to receive may be different for each slot.
  • the UE may attempt to receive both the DL allocation and the UL grant in slot #n, but the UE may only attempt to receive the DL allocation in slot # n + 1.
  • a data channel on a relatively long TTI may be configured to be schedulable in DCIs of several TTIs having a relatively small length. For example, when one UL TTI is configured across slot # n + 2 and slot # n + 3, only one UL grant may be sufficient to schedule UL data on the TTI. In this case, the UL grant capable of scheduling the corresponding TTI may be set to be transmitted through one of several DL TTIs (ie, slot #n and slot # n + 1).
  • rate matching may be performed in consideration of a DL control channel region and / or a UL control channel region that may exist in a shorter TTI period when transmitting and receiving data channels on a relatively longer length TTI. Rules can be set to be performed.
  • the rule may be set such that rate matching is performed (in consideration of the DL control channel region and the GP region for receiving).
  • the period of performing rate matching considering the UL control channel may be set to be the same as the DL TTI period. Accordingly, the UE may perform rate matching for the UL data channel in consideration of an UL control channel region composed of slot # n + 2 last k symbols, assuming that an UL control channel may exist in every slot.
  • 13 is a view showing a signal transmission and reception method between the terminal and the base station according to the present invention.
  • the terminal and the base station according to the present invention can transmit and receive signals.
  • the terminal receives the PDCCH from the base station (S1310).
  • a first numerology for example, 30 kHz subcarrier spacing
  • the PDCCH may have a first numerology
  • the terminal may receive a PDCCH having the first numerology.
  • the terminal performs PDSCH reception (S1320) or PUSCH transmission (S1330) according to whether the data channel scheduled by the PDCCH is PDSCH or PUSCH.
  • the second numerology applied to the PDSCH or PUSCH may be determined independently of the first numerology.
  • the second numerology may have a 15 kHz subcarrier spacing.
  • the time when the UE performs the PUSCH transmission (or the length of time between receiving the PDCCH and the time of transmitting the PUSCH) is assigned to the PUSCH. It can be determined based on the second numerology applied.
  • PUSCH transmission when a PUSCH transmission is scheduled at a time after 4 symbols based on the DL control channel, the UE is at a time after 4 symbols (on the lower index of FIG. 9) based on the subcarrier interval applied to the UL data channel.
  • PUSCH transmission may be performed.
  • the terminal may transmit acknowledgment information (eg, A / N) for the PDSCH (S1340).
  • acknowledgment information eg, A / N
  • the time point at which the terminal transmits the acknowledgment information may be determined based on the third numerology of the uplink control channel.
  • the first numerology may be set through higher layer signaling.
  • the second numerology may be configured through higher layer signaling or physical layer signaling according to a data channel scheduled by the PDCCH.
  • a second numerology applied to the PDSCH may be set by higher layer signaling.
  • the second numerology applied to the PUSCH may be set by physical layer signaling.
  • examples of the proposed scheme described above may also be regarded as a kind of proposed schemes as they may be included as one of the implementation methods of the present invention.
  • the above-described proposed schemes may be independently implemented, some proposed schemes may be implemented in a combination (or merge) form.
  • Information on whether the proposed methods are applied may be defined so that the base station informs the terminal through a predefined signal (eg, a physical layer signal or a higher layer signal). have.
  • FIG. 14 is a diagram illustrating the configuration of a terminal and a base station in which the proposed embodiment can be implemented.
  • the terminal and the base station illustrated in FIG. 14 operate to implement the above-described embodiments of the method for transmitting / receiving a signal between the terminal and the base station.
  • a UE (UE) 1 may operate as a transmitting end in uplink and a receiving end in downlink.
  • the base station eNB: e-Node B or gNB: new generation NodeB, 100
  • gNB new generation NodeB
  • the terminal and the base station may include transmitters 10 and 110 and receivers 20 and 120, respectively, to control transmission and reception of information, data and / or messages.
  • the antenna may include antennas 30 and 130 for transmitting and receiving messages.
  • the terminal and the base station may each include a processor (Processor 40, 140) for performing the above-described embodiments of the present invention and a memory (50, 150) that can temporarily or continuously store the processing of the processor, respectively. Can be.
  • a processor Processor 40, 140
  • a memory 50, 150
  • the terminal 1 configured as described above receives the downlink control channel having the first numerology through the receiver 20. Subsequently, the terminal 1 has a second numerology, which is scheduled by the downlink control channel through the processor 40 controlling the transmitter 10 and the receiver 20 and determined independently of the first numerology. It performs downlink data channel reception or uplink data channel transmission.
  • the base station 100 transmits a downlink control channel having a first numerology through the transmitter 110. Subsequently, the base station 100 uses a processor 140 for controlling the transmitter 110 and the receiver 120 to determine a second independently of the first numerology based on the scheduling indicated by the downlink control channel. Performs downlink data channel transmission or uplink data channel reception with numerology.
  • the transmitter and the receiver included in the terminal and the base station include a packet modulation and demodulation function, a high speed packet channel coding function, an orthogonal frequency division multiple access (OFDMA) packet scheduling, and a time division duplex (TDD) for data transmission. Packet scheduling and / or channel multiplexing may be performed.
  • the terminal and the base station of FIG. 14 may further include a low power radio frequency (RF) / intermediate frequency (IF) unit.
  • RF radio frequency
  • IF intermediate frequency
  • the terminal is a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a GSM (Global System for Mobile) phone, a WCDMA (Wideband CDMA) phone, an MBS.
  • PDA personal digital assistant
  • PCS personal communication service
  • GSM Global System for Mobile
  • WCDMA Wideband CDMA
  • MBS Multi Mode-Multi Band
  • a smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal portable terminal, and may mean a terminal incorporating data communication functions such as schedule management, fax transmission and reception, which are functions of a personal mobile terminal, in a mobile communication terminal.
  • a multimode multiband terminal can be equipped with a multi-modem chip to operate in both portable Internet systems and other mobile communication systems (e.g., code division multiple access (CDMA) 2000 systems, wideband CDMA (WCDMA) systems, etc.). Speak the terminal.
  • CDMA code division multiple access
  • WCDMA wideband CDMA
  • Embodiments of the invention may be implemented through various means.
  • embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.
  • a method according to embodiments of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), Field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors and the like can be implemented.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs Field programmable gate arrays
  • processors controllers, microcontrollers, microprocessors and the like can be implemented.
  • the method according to the embodiments of the present invention may be implemented in the form of a module, procedure, or function that performs the functions or operations described above.
  • software code may be stored in memory units 50 and 150 and driven by processors 40 and 140.
  • the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
  • Embodiments of the present invention can be applied to various wireless access systems.
  • various radio access systems include 3rd Generation Partnership Project (3GPP) or 3GPP2 systems.
  • 3GPP 3rd Generation Partnership Project
  • Embodiments of the present invention can be applied not only to the various wireless access systems, but also to all technical fields to which the various wireless access systems are applied.
  • the proposed method can be applied to mmWave communication system using ultra high frequency band.

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

Abstract

L'invention concerne un procédé par lequel un terminal et une station de base émettent/reçoivent des signaux, et un dispositif permettant de prendre en charge ce dernier. Plus spécifiquement, l'invention concerne : un procédé par lequel une station de base ou un terminal émet/reçoit un canal de commande et un canal de données ayant une numérologie indépendante (par exemple, un espacement de sous-porteuse) l'un par rapport à l'autre; et un dispositif permettant de prendre en charge ce dernier.
PCT/KR2017/010706 2016-09-29 2017-09-27 Procédé par lequel un terminal et une station de base de émettent/reçoivent des signaux dans un système de communication sans fil, et dispositif permettant de prendre en charge ce dernier WO2018062840A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US201662401851P 2016-09-29 2016-09-29
US62/401,851 2016-09-29
US201662407457P 2016-10-12 2016-10-12
US62/407,457 2016-10-12
US201662417416P 2016-11-04 2016-11-04
US62/417,416 2016-11-04
US201662420572P 2016-11-11 2016-11-11
US62/420,572 2016-11-11

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CN112740604A (zh) * 2018-09-28 2021-04-30 高通股份有限公司 跨载波参考信号调度偏移和阈值确定
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CN112400337A (zh) * 2018-05-10 2021-02-23 株式会社Ntt都科摩 用户终端
CN112400337B (zh) * 2018-05-10 2024-03-15 株式会社Ntt都科摩 用户终端
CN112740604A (zh) * 2018-09-28 2021-04-30 高通股份有限公司 跨载波参考信号调度偏移和阈值确定
CN112740604B (zh) * 2018-09-28 2024-05-28 高通股份有限公司 跨载波参考信号调度偏移和阈值确定
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CN113207189B (zh) * 2020-01-31 2023-08-25 联发科技（新加坡）私人有限公司 数据传输方法

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