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WO2019031909A1 - Procédé de détermination de type de créneau temporel pour terminal dans un système de communication sans fil et terminal utilisant ledit procédé - Google Patents

Procédé de détermination de type de créneau temporel pour terminal dans un système de communication sans fil et terminal utilisant ledit procédé Download PDF

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Publication number
WO2019031909A1
WO2019031909A1 PCT/KR2018/009163 KR2018009163W WO2019031909A1 WO 2019031909 A1 WO2019031909 A1 WO 2019031909A1 KR 2018009163 W KR2018009163 W KR 2018009163W WO 2019031909 A1 WO2019031909 A1 WO 2019031909A1
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WO
WIPO (PCT)
Prior art keywords
slot
pucch
symbols
slot type
type
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Ceased
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PCT/KR2018/009163
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English (en)
Korean (ko)
Inventor
명세창
양석철
안준기
박한준
김선욱
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LG Electronics Inc
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LG Electronics Inc
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Priority to KR1020187024539A priority Critical patent/KR102070861B1/ko
Publication of WO2019031909A1 publication Critical patent/WO2019031909A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/26035—Maintenance of orthogonality, e.g. for signals exchanged between cells or users, or by using covering codes or sequences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607—Cyclic extensions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • 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
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling

Definitions

  • the present invention relates to wireless communication, and more particularly, to a slot type determination method performed by a terminal in a wireless communication system and a terminal using the method.
  • MTC Massive Machine Type Communications
  • Next-generation wireless access technologies that take into account improved mobile broadband communications, massive MTC, and URLLC (Ultra-Reliable and Low Latency Communication) technologies are being discussed as well as communication systems that are sensitive to reliability and latency. It can be called new radio access technology (RAT) or new radio (NR).
  • RAT new radio access technology
  • NR new radio
  • NR a scheme of supporting an orthogonal frequency division multiplexing (OFDM) scheme capable of having variable numerer according to various services is considered.
  • OFDM orthogonal frequency division multiplexing
  • NR system considers flexibility as an important design philosophy to support various services. For example, when a scheduling unit is a slot, an arbitrary slot is allocated to a Physical Downlink Shared Channel (PDSCH) transmission slot (hereinafter referred to as a DL slot) or a Physical Uplink Shared Channel (PUSCH) , A physical channel for transmitting uplink data), and a transmission slot (hereinafter, UL slot). It can also be expressed as supporting dynamic DL / UL settings.
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • a UL region that can be used for uplink in a slot and a DL region that can be used for a downlink in the NR system may be changed to a symbol unit constituting a slot.
  • the combination of the UL region and the DL region that the slot can have increases exponentially in proportion to the number of symbols constituting the slot.
  • the NR system supporting the dynamic DL / UL setting it is also necessary to allocate the resources of the UL control channel considering the type of the UL control channel, the type of the UL control information, the terminal type, Do.
  • the present invention provides a method of determining a slot type of a terminal in a wireless communication system and a terminal using the same.
  • a method for determining a slot type of a terminal in a wireless communication system includes receiving slot type indication information from a base station and determining a type of slot with one of a plurality of slot types based on the slot type indication information, A first slot type in which the entire symbols are flexible symbols, a second slot type in which all symbols constituting the slot are used in the uplink, the number of symbols used in the uplink among the symbols constituting the slot A fourth slot type in which the number of symbols used as a downlink among the symbols constituting the slot is greater than the number of symbols that can be used in the uplink, And all of the symbols constituting the slot include a fifth slot type which is a symbol used as a downlink.
  • a physical uplink control channel (PUCCH) format that can be used can be determined.
  • PUCCH physical uplink control channel
  • the PUCCH format may be a short PUCCH format transmitted over one or two symbols or a long PUCCH format transmitted over four or more symbols.
  • the transmission duration of a usable PUCCH (physical uplink control channel) may be determined.
  • the UE may be a Type A terminal having a coverage limitation for PUCCH transmission or a Type B terminal having no coverage limitation for PUCCH transmission.
  • a long PUCCH format transmitted through four or more symbols may be used regardless of the slot type.
  • a short PUCCH format transmitted through one or two symbols may be used regardless of the slot type.
  • the slot includes a flexible symbol, and when the flexible symbol is dynamically indicated as an uplink symbol, the flexible symbol may not be used for physical uplink control channel (PUCCH) transmission.
  • PUCCH physical uplink control channel
  • the slot includes a flexible symbol, and if the flexible symbol is dynamically indicated as an uplink symbol, the flexible symbol may also be used for physical uplink control channel (PUCCH) transmission.
  • PUCCH physical uplink control channel
  • a user equipment provided in another aspect includes a transceiver for transmitting and receiving radio signals and a processor operating in conjunction with the transceiver, the processor receiving slot type indication information from a base station Based on the slot type indication information, determining a type of a slot with one of a plurality of slot types, wherein the plurality of slot types includes a first slot Type, a second slot type in which all symbols constituting the slot are used for uplink, a second slot type in which the number of symbols used in the uplink among the symbols constituting the slot is greater than the number of symbols that can be used in the downlink, Many third slot types, and the number of symbols used as the downlink among the symbols constituting the slot can be used as the uplink It is characterized in that it has all of the symbols that make up a lot of the fourth slot and the slot type than the number of symbols including the symbols, which are the fifth slot type to be used in the downlink.
  • a candidate type of a slot which is a unit of scheduling, is appropriately determined, and then the base station dynamically informs the terminal of one of the plurality of candidate types through the slot type indication information. Therefore, the amount of information required to inform the slot type can be reduced.
  • the present invention can be applied to a system having flexibility as an important design philosophy such as NR Suitable.
  • FIG 1 illustrates an existing wireless communication system.
  • FIG. 2 is a block diagram illustrating a radio protocol architecture for a user plane.
  • FIG. 3 is a block diagram illustrating a wireless protocol structure for a control plane.
  • FIG. 4 illustrates a system structure of a next generation radio access network (NG-RAN) to which NR is applied.
  • NG-RAN next generation radio access network
  • Figure 5 illustrates a frame structure that may be applied in NR.
  • FIG. 6 illustrates CORESET.
  • FIG. 7 is a diagram showing the difference between the conventional control area and CORESET in NR.
  • Fig. 8 shows an example of a frame structure that can be used in NR.
  • 9 is an abstract schematic representation of a hybrid beamforming structure in terms of TXRU and physical antennas.
  • FIG. 10 is a diagram illustrating the beam sweeping operation for a synchronization signal and system information in a downlink (DL) transmission process.
  • Fig. 11 illustrates the type of slot type.
  • FIG. 12 illustrates a slot type determination method according to an embodiment of the present invention.
  • FIG. 13 is a block diagram illustrating an apparatus in which an embodiment of the present invention is implemented.
  • E-UTRAN Evolved-UMTS Terrestrial Radio Access Network
  • LTE Long Term Evolution
  • the E-UTRAN includes a base station (BS) 20 that provides a user plane (UE) with a control plane and a user plane.
  • the terminal 10 may be fixed or mobile and may be referred to by other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT) .
  • the base station 20 is a fixed station that communicates with the terminal 10 and may be referred to as another term such as an evolved NodeB (eNB), a base transceiver system (BTS), an access point, or the like.
  • eNB evolved NodeB
  • BTS base transceiver system
  • access point or the like.
  • the base stations 20 may be interconnected via an X2 interface.
  • the base station 20 is connected to an S-GW (Serving Gateway) through an MME (Mobility Management Entity) and an S1-U through an EPC (Evolved Packet Core) 30, more specifically, an S1-MME through an S1 interface.
  • S-GW Serving Gateway
  • MME Mobility Management Entity
  • EPC Evolved Packet Core
  • the EPC 30 is composed of an MME, an S-GW, and a P-GW (Packet Data Network-Gateway).
  • the MME has information on the access information of the terminal or the capability of the terminal, and this information is mainly used for managing the mobility of the terminal.
  • the S-GW is a gateway having an E-UTRAN as an end point
  • the P-GW is a gateway having a PDN as an end point.
  • the layers of the radio interface protocol between the UE and the network are classified into L1 (first layer), L1 (second layer), and the like based on the lower three layers of the Open System Interconnection (OSI)
  • a physical layer belonging to a first layer provides an information transfer service using a physical channel, and a physical layer (physical layer)
  • An RRC (Radio Resource Control) layer located at Layer 3 controls the radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the BS.
  • the 2 is a block diagram illustrating a radio protocol architecture for a user plane.
  • 3 is a block diagram illustrating a wireless protocol structure for a control plane.
  • the user plane is a protocol stack for transmitting user data
  • the control plane is a protocol stack for transmitting control signals.
  • a physical layer provides an information transfer service to an upper layer using a physical channel.
  • the physical layer is connected to a MAC (Medium Access Control) layer, which is an upper layer, through a transport channel.
  • Data is transferred between the MAC layer and the physical layer through the transport channel.
  • the transport channel is classified according to how the data is transmitted through the air interface.
  • the physical channel can be modulated by an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and uses time and frequency as radio resources.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the function of the MAC layer includes a mapping between a logical channel and a transport channel and a multiplexing / demultiplexing into a transport block provided as a physical channel on a transport channel of a MAC SDU (service data unit) belonging to a logical channel.
  • the MAC layer provides a service to a Radio Link Control (RLC) layer through a logical channel.
  • RLC Radio Link Control
  • the function of the RLC layer includes concatenation, segmentation and reassembly of the RLC SDUs.
  • the RLC layer includes a Transparent Mode (TM), an Unacknowledged Mode (UM), and an Acknowledged Mode (RB) in order to guarantee various QoSs required by a radio bearer (RB) , And AM).
  • AM RLC provides error correction via automatic repeat request (ARQ).
  • the Radio Resource Control (RRC) layer is defined only in the control plane.
  • the RRC layer is responsible for the control of logical channels, transport channels and physical channels in connection with the configuration, re-configuration and release of radio bearers.
  • RB means a logical path provided by a first layer (PHY layer) and a second layer (MAC layer, RLC layer, PDCP layer) for data transmission between a UE and a network.
  • the functions of the Packet Data Convergence Protocol (PDCP) layer in the user plane include transmission of user data, header compression and ciphering.
  • the functions of the Packet Data Convergence Protocol (PDCP) layer in the control plane include transmission of control plane data and encryption / integrity protection.
  • the setting of the RB means a process of defining characteristics of a radio protocol layer and a channel to provide a specific service, and setting each specific parameter and an operation method.
  • RB can be divided into SRB (Signaling RB) and DRB (Data RB).
  • SRB is used as a path for transmitting the RRC message in the control plane
  • DRB is used as a path for transmitting the user data in the user plane.
  • the UE When an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected state, and if not, the UE is in the RRC idle state.
  • the downlink transmission channel for transmitting data from the network to the terminal includes a BCH (Broadcast Channel) for transmitting system information and a downlink SCH (Shared Channel) for transmitting user traffic or control messages.
  • BCH Broadcast Channel
  • SCH Shared Channel
  • a traffic or control message of a downlink multicast or broadcast service it may be transmitted through a downlink SCH, or may be transmitted via a separate downlink MCH (Multicast Channel).
  • the uplink transmission channel for transmitting data from the UE to the network includes a random access channel (RACH) for transmitting an initial control message and an uplink SCH (Shared Channel) for transmitting user traffic or control messages.
  • RACH random access channel
  • a logical channel mapped to a transport channel is a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic Channel).
  • BCCH broadcast control channel
  • PCCH paging control channel
  • CCCH common control channel
  • MCCH multicast control channel
  • a physical channel is composed of several OFDM symbols in the time domain and a plurality of sub-carriers in the frequency domain.
  • One sub-frame is composed of a plurality of OFDM symbols in the time domain.
  • a resource block is a resource allocation unit, and is composed of a plurality of OFDM symbols and a plurality of sub-carriers.
  • each subframe may use specific subcarriers of specific OFDM symbols (e.g., the first OFDM symbol) of the corresponding subframe for PDCCH (Physical Downlink Control Channel), i.e., L1 / L2 control channel.
  • the TTI Transmission Time Interval
  • new radio access technology new RAT
  • NR new radio
  • MTC Massive Machine Type Communications
  • URLLC Ultra-Reliable and Low Latency Communication
  • FIG. 4 illustrates a system structure of a next generation radio access network (NG-RAN) to which NR is applied.
  • NG-RAN next generation radio access network
  • the NG-RAN may include a gNB and / or an eNB that provides a user plane and control plane protocol termination to the terminal.
  • FIG. 4 illustrates a case where only gNB is included.
  • the gNB and the eNB are interconnected by an Xn interface.
  • the gNB and the eNB are connected to the 5G Core Network (5G Core Network: 5GC) via the NG interface.
  • 5G Core Network: 5GC 5G Core Network
  • AMF access and mobility management function
  • UPF user plane function
  • the gNB supports inter cell inter-cell RRM, RB control, connection mobility control, radio admission control, measurement configuration and provisioning, , Dynamic resource allocation, and the like.
  • AMF can provide functions such as NAS security, idle state mobility handling, and so on.
  • the UPF can provide functions such as mobility anchoring, PDU processing, and the like.
  • Figure 5 illustrates a frame structure that may be applied in NR.
  • the frame may be composed of 10 ms (millisecond) and may include 10 subframes composed of 1 ms.
  • one or a plurality of slots may be included according to a subcarrier spacing.
  • the following table illustrates the subcarrier spacing configuration ⁇ .
  • the following table shows the number of slots in a frame (N frame, ⁇ slot ), the number of slots in a subframe (N subframe, ⁇ slot ), and the number of symbols in a slot (N slot symb ) according to a subcarrier spacing configuration ⁇ . .
  • the physical downlink control channel can be composed of one or more control channel elements (CCEs) as shown in the following table.
  • CCEs control channel elements
  • the PDCCH can be transmitted through a resource consisting of 1, 2, 4, 8, or 16 CCEs.
  • the CCE is composed of six resource element groups (REGs).
  • REGs resource element groups
  • One REG is composed of one resource block in the frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in the time domain.
  • OFDM orthogonal frequency division multiplexing
  • CORESET control resource set
  • FIG. 6 illustrates CORESET.
  • CORESET is composed of N CORESET RB resource blocks in the frequency domain and N CORESET symb ⁇ ⁇ 1, 2, 3 ⁇ symbols in the time domain.
  • N CORESET RB , N CORESET The symb may be provided by the base station via an upper layer signal.
  • a plurality of CCEs (or REGs) may be included in the CORESET.
  • the UE can attempt to detect the PDCCH in units of 1, 2, 4, 8, or 16 CCEs in the CORESET.
  • One or a plurality of CCEs capable of attempting to detect a PDCCH may be referred to as a PDCCH.
  • the terminal can set a plurality of CORESETs.
  • FIG. 7 is a diagram showing the difference between the conventional control area and CORESET in NR.
  • the control region 300 in the conventional wireless communication system (e.g., LTE / LTE-A) is configured over the entire system band used by the base station. All terminals except for some terminals (eMTC / NB-IoT terminal for example) supporting only a narrow band receive radio signals of the entire system band of the base station in order to properly receive / decode the control information transmitted by the base station I should have been able.
  • All terminals except for some terminals eMTC / NB-IoT terminal for example
  • the CORESETs 301, 302, and 303 may be radio resources for control information that the UE should receive, and may use only a part of the system bandwidth.
  • the base station can assign CORESET to each UE and can transmit control information through the assigned CORESET. For example, in FIG. 6, the first CORESET 301 may be allocated to the UE 1, the second CORESET 302 may be allocated to the second UE, and the third CORESET 303 may be allocated to the UE 3.
  • the terminal in the NR can receive control information of the base station without necessarily receiving the entire system band.
  • CORESET may have a UE-specific CORESET for transmitting UE-specific control information and a common CORESET for transmitting control information common to all UEs.
  • the resource may include at least one of a resource in a time domain, a resource in a frequency domain, a resource in a code domain, and a resource in a spatial domain.
  • Fig. 8 shows an example of a frame structure that can be used in NR.
  • a structure in which a control channel and a data channel are time division multiplexed (TDM) in one TTI may be considered as one of frame structures for the purpose of minimizing latency, as shown in FIG. 8 .
  • the hatched area indicates a downlink control area
  • the black area indicates an uplink control area.
  • the unmarked area may be used for downlink data transmission or for uplink data transmission.
  • This structure is characterized in that downlink (DL) transmission and uplink (UL) transmission sequentially proceed in one subframe, DL data is transmitted in a subframe, and UL ACK / NACK Can receive. As a result, it is possible to reduce the time taken to retransmit the data when a data transmission error occurs, thereby minimizing the latency of the final data transmission.
  • a time gap may be required for the process of switching from the transmission mode to the reception mode or from the reception mode to the transmission mode.
  • some OFDM symbols at the time of switching from DL to UL in a self-contained subframe structure may be set as a guard period (GP).
  • the wavelength is shortened so that a plurality of antenna elements can be installed in the same area. That is, a total of 64 (8x8) antenna elements can be installed in a 2-dimension array at 0.5 lambda (wavelength) intervals on a 4 by 4 cm panel with a wavelength of 1 cm in the 30 GHz band. Therefore, in the mmW, a plurality of antenna elements can be used to increase the beamforming (BF) gain, thereby increasing the coverage or increasing the throughput.
  • BF beamforming
  • TXRU transceiver unit
  • independent beamforming can be performed for each frequency resource.
  • installing a TXRU on all 100 antenna elements has a problem in terms of cost effectiveness. Therefore, a method of mapping a plurality of antenna elements to one TXRU and adjusting the direction of a beam with an analog phase shifter is considered.
  • Such an analog beamforming method has a disadvantage that it can not perform frequency selective beamforming since it can make only one beam direction in all bands.
  • Hybrid beamforming with B TXRUs that are fewer than Q antenna elements in the middle of digital beamforming (Digital BF) and analog beamforming (analog BF) can be considered.
  • Digital BF digital beamforming
  • analog beamforming analog beamforming
  • a hybrid beamforming technique combining digital beamforming and analog beamforming can be used.
  • analog beamforming refers to an operation of performing precoding (or combining) in an RF stage.
  • the baseband stage and the RF stage perform precoding (or combining), respectively, so that the number of RF chains and D / A (or A / D) converters while reducing the number of converters to digital beamforming (digital beamforming).
  • 9 is an abstract schematic representation of a hybrid beamforming structure in terms of TXRU and physical antennas.
  • the hybrid beamforming structure can be represented by N transceiver units (TXRU) and M physical antennas.
  • the digital beamforming for the L data layers to be transmitted at the transmitting end can be represented by an N by L matrix, and the N converted digital signals are transmitted through the TXRU to the analog signal (Analog signal), and analog beamforming represented by M by N matrix is applied.
  • the base station is designed to change the analog beamforming on a symbol-by-symbol basis, thereby considering more efficient beamforming for a terminal located in a specific area.
  • the NR system introduces a plurality of antenna panels to which independent hybrid beamforming is applicable. Is also being considered.
  • the base station when the base station utilizes a plurality of analog beams, since an analog beam advantageous for signal reception may be different for each terminal, at least a synchronization signal, system information, There is considered a beam sweeping operation in which a plurality of analog beams to be applied by a base station in a specific subframe (SF) are changed on a symbol-by-symbol basis so that all terminals can have a reception opportunity .
  • SF subframe
  • FIG. 10 is a diagram illustrating the beam sweeping operation for a synchronization signal and system information in a downlink (DL) transmission process.
  • a physical resource (or a physical channel) through which system information of an NR system is transmitted in a broadcasting manner is referred to as an xPBCH (physical broadcast channel).
  • analog beams belonging to different antenna panels within one symbol can be simultaneously transmitted.
  • FIG. 10 for measuring a channel for each analog beam corresponding to a specific antenna panel
  • BRS Beam RS
  • the BRS may be defined for a plurality of antenna ports, and each antenna port of the BRS may correspond to a single analog beam.
  • the synchronization signal or the xPBCH can be transmitted by applying all the analog beams in the analog beam group so that the arbitrary terminal can receive the synchronization signal.
  • the LTE system includes power control, scheduling, cell search, cell reselection, handover, radio link or connection monitoring, and connection establish / re-establish. RRM operation.
  • the serving cell may request RRM measurement information, which is a measurement value for performing RRM operation, to the UE.
  • RRM measurement information which is a measurement value for performing RRM operation, to the UE.
  • the UE transmits cell search information, reference signal received power (RSRP), reference signal received quality) can be measured and reported.
  • RSRP reference signal received power
  • a UE receives 'measConfig' as an upper layer signal for RRM measurement from a serving cell.
  • the UE measures RSRP or RSRQ according to the 'measConfig' information.
  • the definitions of RSRP and RSRQ are as follows.
  • RSRP may be defined as the linear average of the power contributions of the resource elements carrying the cell specific reference signal within the measurement frequency band under consideration.
  • RSRQ can be defined as NxRSRP / (E-UTRA carrier RSSI).
  • N is the number of resource blocks of the E-UTRA carrier RSSI measurement band.
  • RSSI means received broadband power, including thermal noise and noise, within the measurement band.
  • the UE when the terminal operating in the LTE system is an intra-frequency measurement, the UE transmits an information element (information element) related to the allowed measurement band transmitted in SIB3 (system information block type 3) In case of inter-frequency measurement, it is allowed to measure RSRP in the band corresponding to one of 6, 15, 25, 50, 75, 100RB (resource block) through the allowed measurement band transmitted in SIB5, Or in the absence of the IE, by default in the frequency band of the entire downlink (DL) system.
  • SIB3 system information block type 3
  • the UE when the UE receives the allowed measurement bandwidth, the UE considers the corresponding value as the maximum measurement bandwidth and can freely measure the RSRP value within the corresponding value.
  • the serving cell transmits an IE defined as broadband-RSRQ and the allowed measurement band is set to 50RB or more, the UE must calculate the RSRP value for the entire allowed measurement bandwidth.
  • the RSSI is measured in the frequency band of the receiver of the terminal according to the definition of the RSSI band.
  • the 3GPP standardization group considers a network slicing scheme for implementing a plurality of logical networks on a single physical network in an NR system as a 5G wireless communication system.
  • the logical network must be able to support services having various requirements (eMBB, mMTC, URLLC, etc.), and the physical layer system of the NR system may have a variable numerology according to the various services And also supports an orthogonal frequency division multiplexing (OFDM) scheme.
  • OFDM orthogonal frequency division multiplexing
  • NR system considers flexibility as an important design philosophy to support various services.
  • &quot transmission slot
  • PUSCH physical channel for transmitting UL data
  • Slot (hereinafter referred to as " dynamic DL / UL setting ").
  • a physical channel PUCCH for transmitting HARQ-ACK information for the PDSCH scheduled in the DL slot and / or UL control information such as CSI is transmitted in the UL transmission enabled area . Since the DL transmittable area and the UL transmission area are variable for each slot, the resource or the form in which the PUCCH can be transmitted may be different depending on the type of the corresponding slot.
  • an extremely slot may be allocated only to the DL transmittable area. In this slot, since there is no UL transmission resource for PUCCH transmission in the slot, PUCCH transmission is impossible. As another example, even if the UL transmission region is allocated in the slot, the PUCCH may not be transmitted depending on its size.
  • the format of the PUCCH is a Short PUCCH that is transmitted over one or two symbols, and a Long PUCCH that is transmitted over four or more symbols. When the UL transmission region is composed of three symbols The long PUCCH may not be transmitted.
  • the present invention first divides the types of slots according to the dynamic DL / UL setting and describes the characteristics, and based on the PUCCH type according to each slot type and the difference of PUCCH resources according to UCI, .
  • the base station can instruct the UE to transmit the PUCCH through the DCI.
  • the base station determines whether the PUCCH is to be transmitted through a slot to which the PUCCH is to be transmitted, a start symbol at which the PUCCH transmission starts within the slot, Can be informed of the transmission duration.
  • an ARI acknowledgenowledge
  • OCC orthogonal cover code
  • CS cyclic shift
  • the short PUCCH format means a PUCCH in which the transmission duration is transmitted in 1-symbol or 2-symbol
  • the long PUCCH format means a PUCCH in which the transmission duration is 4-symbol to 14-symbol.
  • the ARI PUCCH resource is a PUCCH resource through which uplink control information including HARQ-ACK and CSI can be transmitted, and the CSI or SR PUCCH resource refers to an individual PUCCH resource for transmitting CSI and SR, respectively.
  • Multi-beam PRACH means a case where the direction of the PRACH transmission beam of the UE or the PRACH reception beam of the BS is changed without being fixed.
  • a PUCCH resource allocation method considering the type of PUCCH and UCI type for each type of slot.
  • Fig. 11 illustrates the type of slot type.
  • a slot type can be divided into slot types # 1, 2, 3, 4, and 5.
  • the DL transmission area and the UL transmission area of the slot can be flexibly changed according to the setting of the base station.
  • the DL transmission area and the UL transmission area may be set to various values in units of symbols constituting a slot.
  • the slot type # 2 is a slot in which the entire slot is set as the UL transmission region, and the PRACH transmission resource can occupy all or part of the slot.
  • slot Type # 3 a part of the slot is a DL transmission region, and the rest is a UL transmission region, and PRACH transmission resources may be located at the rear of the slot. That is, the slot type # 3 may be a slot having a relatively larger UL transmission area than the DL transmission area.
  • the slot type # 4 a synchronization block in which a synchronization signal is transmitted to a slot where only a part of the slot is the UL transmission area and the rest is set as the DL transmission area can be transmitted in the front area. That is, the slot type # 4 may be a relatively larger slot in the DL transmission region than in the UL transmission region.
  • Slot type # 5 DL-only slot in which only downlink exists (for example, SS block over the entire slot).
  • the SS block can be transmitted over all or a part of a slot in a slot in which the entire slot is set as the DL transmission area.
  • An SS block is a block through which a synchronization signal and / or a physical broadcast channel can be transmitted.
  • the following table illustrates the slot formats that the base station can set for the terminal.
  • each format number may correspond to a specific slot type.
  • format number 2 corresponds to slot type # 1.
  • Format number 1 corresponds to slot type # 2.
  • Format number 10-15 corresponds to slot type # 3. Since the UL transmission region is relatively larger than the DL transmission region (the region denoted by F).
  • Format number 3-6 corresponds to slot type # 4. Since the DL transmission area is relatively larger than the area where the UL transmission is possible (area indicated by F).
  • Format number 0 corresponds to slot type # 5.
  • the corresponding relationship between the format number and the slot type is merely an example.
  • one of five slot types may be determined based on the information dynamically indicated through the DCI.
  • the base station can provide an indication to the terminal (which may be referred to as SFI) indicating the format of the slot through the DCI.
  • SFI the terminal
  • the SFI is applied from the corresponding slot immediately after reception, and the number of slots in which the indicated slot format continues may also be indicated through the DCI.
  • flexible symbols may not be assumed to be DL or UL symbols and may only be used for CORSET monitoring.
  • FIG. 12 illustrates a slot type determination method according to an embodiment of the present invention.
  • the terminal receives slot type indication information from a base station (S100).
  • the base station and the terminal can preset a plurality of slot types as shown in Table 4, and then notify the slot type of slots to be used through a specific field of the DCI.
  • a specific field of the DCI becomes the slot type indication information.
  • the plurality of slot types may be slot types # 1 to # 5 described with reference to FIG. 11, and specific examples thereof are described in Table 4.
  • the terminal determines a slot type as one of the plurality of slot types based on the slot type indication information (Sl 10).
  • the UL-DL setting of a cell is informed through an upper layer signal.
  • the channel state can be rapidly changed, and it is not appropriate to apply the conventional method in the NR in which various types of neuroregions are used .
  • various slot types may be defined between the base station and the terminals as shown in Table 4, and then the slot type can be dynamically informed through the DCI.
  • a sub-frame setting in a frame is determined using a fixed number (for example, seven) of UL-DL settings in advance.
  • each subframe according to each UL-DL setting is fixedly set as a DL subframe, an UL subframe, or a special subframe. That is, the link direction of the subframe according to each UL-DL setting is fixed.
  • the present invention also provides a slot type in which the DL transmission region and the UL transmission region can be flexibly changed according to the setting of the base station during the slot type.
  • the link direction can be flexibly changed in units of symbols in a slot, not in a subframe, so that the flexibility of scheduling is increased uncompromisingly. Therefore, it is possible to dynamically cope with a situation in which the channel status rapidly changes or the uplink / downlink traffic rapidly changes.
  • At least one DL subframe and UL subframe have to be included in each UL-DL setting.
  • the UL transmission resource can not be set because the UL transmission region does not exist in the slot, and therefore, no PUCCH format can be set for transmission.
  • a PUCCH resource can be allocated considering a possible PUCCH format in the slot type. If the amount of uplink control information to be received from the UE is small (i.e., a small payload size) and transmission is possible with only a short PUCCH format, transmission of a short PUCCH format to the slot types # 1, # 2, # 3, And, in a specific case, it is possible to set and instruct transmission of a long PUCCH format in slot types # 1, # 2, and # 3 even if the payload size is small.
  • a long PUCCH Format transmission can be set and instructed to the terminal.
  • an appropriate PUCCH resource can be set independently or differently according to the UCI type to be transmitted by the UE.
  • a PUCCH resource to be used for transmitting a scheduling request (SR) to a base station can be set and instructed to be transmitted in a short PUCCH format or a long PUCCH format, and a PUCCH resource to be used for transmitting CSI can be transmitted only in a long PUCCH format
  • the terminal can set and instruct the PUCCH resource.
  • the PUCCH format configuration in the ARI PUCCH resource set can be set differently according to the slot type. For example, in the slot type # 1, the ratio of the long PUCCH format resources is set to be higher than that of the short PUCCH format resources, and in the slot type # 2, the ratio of the long PUCCH format resources is set to be lower than that of the short PUCCH format resources.
  • the PUCCH format may be set differently for each terminal even for the same slot type.
  • the multi-beam PRACH is transmitted to the slot types # 2 and # 3, it is possible that there is no PUCCH format that can be set or set to transmit only the short PUCCH format to the slot types # 2 and # 3 in the base station. Also, if the SS block is transmitted in the DL transmission region in the slot type # 4, there may be no PUCCH format that can be set or set to transmit only the short PUCCH format in the slot type # 4 in the base station.
  • a PUCCH transmission is instructed in a slot or symbol set in a cell-specific manner such that a single beam PRACH or PRACH is transmitted in addition to a slot type in which a multi-beam PRACH can be transmitted, such as slot types # 2 and # 3, It is possible to transmit PUCCH in a short PUCCH format or pending and transmit the PUCCH until a slot type in which the PUCCH can be transmitted by dropping or delaying the PUCCH.
  • the long PUCCH length is relatively long in the order of slot type # 2> slot type # 3> slot type # 1 depending on the relative size of the UL transmission region set by the base station.
  • the PUCCH resource e.g., a PUCCH type (e.g., a long PUCCH format and / or a short PUCCH format) and / or a PUCCH transmission interval (E.g., the number of symbols for which the PUCCH is transmitted) and / or the combination of the PUCCH resources (PRB index, OCC index, CS value, etc.) can be set independently (e.g., differently) to the UE.
  • a PUCCH type e.g., a long PUCCH format and / or a short PUCCH format
  • a PUCCH transmission interval E.g., the number of symbols for which the PUCCH is transmitted
  • PRB index, OCC index, CS value, etc. can be set independently (e.g., differently) to the UE.
  • a PUCCH resource set (a plurality of PUCCH resources) corresponding to the ARI value indicated in the DCI may be set differently for each slot type.
  • the ARI PUCCH resource set is configured only in the long PUCCH format
  • the ARI PUCCH resource set is configured only in the short PUCCH format
  • the ARI PUCCH resource set for the type may not be configured.
  • the interval (number of symbols) of the long PUCCH format set in each slot type # 1/2/3 can be set / assigned differently.
  • an ARI PUCCH resource set is configured by a combination of a long PUCCH format and a short PUCCH format, while in the case of slot type # 4, only ARI PUCCH resources A set can be constructed. Also in this case, the interval of the long PUCCH format (i.e., the number of symbols) set in each slot type # 1/2/3 can be set / assigned differently.
  • the PUCCH resources for CSI report transmission and / or SR signaling may be set differently for each slot type.
  • a CSI or SR PUCCH resource is set in a long PUCCH format, while in a slot type # 4, a resource can be set in a short PUCCH format.
  • the interval (number of symbols) of the long PUCCH format set in each slot type # 1/2/3 can be allocated differently.
  • a PUCCH resource can be allocated and instructed to a terminal by considering a possible PUCCH format and a length of a long PUCCH format in each slot type.
  • the slot types # 1, # 2, # 3 It is possible to set and instruct the terminal to transmit a long PUCCH format. Characteristically, because of the length difference of the long PUCCH format possible for each slot type, a longer PUCCH format may be required depending on the size of the large UCI payload size. For example, since the PUCCH format transmission is longer than the slot type # 1 in the slot type # 2, the base station can set and direct the long PUCCH format transmission to the slot type # 2 when the UCI payload size is large.
  • appropriate PUCCH resources can be set independently or differently according to the UCI type to be transmitted by the UE.
  • a PUCCH resource to be used for transmitting a scheduling request (SR) to a base station can be set and instructed to be transmitted in a short PUCCH format or a long PUCCH format, and a PUCCH resource to be used for transmitting CSI can be transmitted only in a long PUCCH format
  • the terminal can set and instruct the PUCCH resource.
  • the PUCCH format configuration in the ARI PUCCH resource set can be set differently according to the slot type.
  • the ratio of the long PUCCH format resource is set to be higher than that of the short PUCCH format resource, and in the slot type # 2, the ratio of the long PUCCH format resource is set to be lower than that of the short PUCCH format resource.
  • ARI PUCCH resource PUCCH transmission configuration of a long PUCCH format and a short PUCCH format can be set, or can be set to transmit only in a long PUCCH format.
  • ARI PUCCH resource The PUCCH transmission setting of the long PUCCH format and the short PUCCH format can be set to be possible, or to transmit only in the long PUCCH format. In case of transmitting multi-beam PRACH, PUCCH transmission setting is impossible.
  • ARI PUCCH resource PUCCH transmission setting is impossible. It can be considered that the HARQ-ACK timing indicated by the base station is not valid in the terminal's viewpoint, and the PUCCH transmission can be disregarded by disregarding the corresponding indication.
  • CSI or SR PUCCH resource PUCCH transmission setting is impossible. If the PUCCH transmission setup is impossible, the UE may drop the CSI or pending the SR transmission, and transmit the PUCCH when the PUCCH transmission is possible in the next slot.
  • ARI PUCCH resource PUCCH transmission setting is impossible. It can be considered that the HARQ-ACK timing indicated by the base station is not valid in the terminal's viewpoint, and the PUCCH transmission can be disregarded by disregarding the corresponding indication.
  • CSI or SR PUCCH resource PUCCH transmission setting is impossible.
  • the UE may drop the CSI or pending the SR transmission and transmit the PUCCH when the PUCCH can be transmitted in the next slot.
  • a Type A terminal with a coverage limitation for PUCCH transmission may use a long PUCCH format transmitted over four or more symbols regardless of the type of slot.
  • ARI PUCCH resource PUCCH transmission configuration of a long PUCCH format and a short PUCCH format can be set, or can be set to transmit only in a short PUCCH format.
  • SR PUCCH resource Only short PUCCH format transmission can be set.
  • ARI PUCCH resource PUCCH transmission configuration of a long PUCCH format and a short PUCCH format can be set, or can be set to transmit only in a short PUCCH format. In the case of transmitting the multi-beam PRACH, it is set to transmit only in the short PUCCH format or the PUCCH transmission can not be set.
  • SR PUCCH resource Only short PUCCH format transmission can be set. In the case of transmitting the multi-beam PRACH, it is set to transmit only in the short PUCCH format or the PUCCH transmission can not be set.
  • ARI PUCCH resource It is set to transmit only in short PUCCH format or PUCCH transmission setting is impossible. It can be considered that the HARQ-ACK timing indicated by the base station is not valid in the terminal's viewpoint, and the PUCCH transmission can be disregarded by disregarding the corresponding indication.
  • CSI or SR PUCCH resource Only PUCCH transmission setting with short PUCCH format is available or PUCCH transmission setting is impossible. If the PUCCH transmission setup is impossible, the UE can drop the CSI or pause the SR transmission and transmit the PUCCH when the PUCCH transmission is possible in the next slot.
  • ARI PUCCH resource PUCCH transmission setting is impossible. It can be considered that the HARQ-ACK timing indicated by the base station is not valid in the terminal's viewpoint, and the PUCCH transmission can be disregarded by disregarding the corresponding indication.
  • CSI or SR PUCCH resource PUCCH transmission setting is impossible.
  • the UE drops the CSI or pays the SR transmission, it can transmit the PUCCH when the PUCCH can be transmitted to the next slot.
  • a Type B terminal without coverage constraints on PUCCH transmission may use a short PUCCH format transmitted over one or two symbols, regardless of the type of slot.
  • possible PUCCH formats for each slot type can be set as an ARI PUCCH resource set.
  • possible PUCCH formats for each slot type can be set as an ARI PUCCH resource set.
  • four long PUCCH formats are set as ARI PUCCH resource sets of slot type # 1
  • two long PUCCH formats and two short PUCCH formats are used for slot type # 2
  • two long PUCCH formats for slot type # One format three short PUCCH formats, and four short PUCCH formats in slot type # 4.
  • ARI PUCCH resource set of slot type # 1
  • Two long PUCCH formats, two short PUCCH formats, and four short PUCCH formats can be set for slot type # 4.
  • ARI PUCCH resource sets can be set to be the same or different in the same slot type for each terminal.
  • the PUCCH formats set by the ARI PUCCH resource set to the UE in the corresponding slot type may be set to have different transmission durations. For example, even though two PUCCH formats and two short PUCCH formats with the same ARI PUCCH resource set are set for the terminal A and the terminal B in the slot type # 1, the transmission duration of the corresponding PUCCH format may be different for each terminal.
  • the PUCCH transmitted by the terminal type A and the terminal type B can be set in advance as an upper layer signal (for example, an RRC signal) by the base station as follows.
  • an upper layer signal for example, an RRC signal
  • PUCCH is set to the minimum length according to the payload size of PUCCH.
  • the UE If the PUCCH transmission is instructed to a slot type that does not satisfy the PUCCH coverage criterion, the UE that has been configured as described above according to the slot type transmits the PUCCH transmission until the slot type satisfying the corresponding criterion, I can do the action.
  • a Type A terminal may refer to a terminal having a coverage limitation, and an ARI PUCCH resource that can be set in a specific slot type may be limited to a specific PUCCH format.
  • an ARI PUCCH resource that can be set in a specific slot type may be limited to a specific PUCCH format.
  • a Type A terminal may not have a PUCCH resource that can be set in the corresponding slot.
  • the Type B terminal may refer to a terminal having no coverage restriction.
  • the PUCCH resource of the short PUCCH format may be set as the ARI PUCCH resource set, and there may be no PUCCH resource setting that can be transmitted as well.
  • the terminal may ignore the HARQ-ACK indication because it does not have a PUCCH resource that can be set in the slot, Instructions can be dropped. And the SR indication may be pending and transmitting the SR PUCCH in the slot in which the PUCCH resource is set.
  • a UE may attempt to simultaneously perform LTE UL transmission and NR UL transmission in two base stations.
  • the terminal may not have sufficient transmission power to perform UL transmission to the two base stations.
  • the LTE transmit power is set to be greater than NR
  • the transmit power of the NR UL channel / signal (e.g., PUCCH) to be transmitted to the NR base station may not be sufficient.
  • the NR base station recognizes the UE as a UE with a power limitation, and can set and instruct the UE to always transmit the NR PUCCH format in a long PUCCH format.
  • the symbols set as flexible or unknown are dynamically UL or DL symbols through a group-common PDCCH or a UE-specific DCI.
  • the PUCCH resource allocation method will be described.
  • the symbols in the slots can be set semi-static to DL symbols, flexible symbols or UL symbols through upper layer signals such as RRC (cell-specific or UE-specific). Symbols set as a flexible symbol or an unknown symbol in a slot can be dynamically indicated as a DL symbol or a UL symbol through a group common PDDCH or a UE-specific DCI.
  • the PUCCH resource allocation can be performed as follows .
  • uplink UL symbols are used as PUCCH resources in addition to semi-statically set UL symbols to be used for PUCCH transmission.
  • a particular slot consists of a total of 14 symbols from 0 to 13, and is set semi-statically as [D D D X X X X X X U U].
  • D is a DL symbol
  • X is a flexible symbol or an unknown symbol
  • U is a UL symbol.
  • the PUCCH is transmitted using only the symbol resources, and in the case of (b), the PUCCH is transmitted using a total of 11 UL symbols including the remaining 8 symbols dynamically indicated in the 3 UL symbols set semi-statically .
  • the PUCCH resource allocation for the 11 UL symbol areas can be utilized as the PUCCH resources set in the slot having the 11 semi-static UL symbols.
  • the PUCCH resource e.g., a PUCCH type (e.g., a long PUCCH format and / or a short PUCCH format) and / or a PUCCH transmission interval Symbol number) and / or a combination of the PUCCH resources (PRB index, OCC index, CS value)
  • a PUCCH resource set (a plurality of PUCCH resources) corresponding to the ARI value indicated in the DCI may be differently set for each slot type.
  • FIG. 13 is a block diagram illustrating an apparatus in which an embodiment of the present invention is implemented.
  • the apparatus 100 includes a processor 110, a memory 120, and a transceiver 130.
  • the processor 110 implements the proposed functions, processes and / or methods.
  • the memory 120 is connected to the processor 110 and stores various information for driving the processor 110.
  • Transceiver 130 is coupled to processor 110 to transmit and / or receive wireless signals.
  • the device 100 may be a base station or a terminal.
  • the processor 110 may include an application-specific integrated circuit (ASIC), another chipset, a logic circuit, a data processing device, and / or a converter for converting baseband signals and radio signals.
  • Memory 120 may include read-only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media, and / or other storage devices.
  • Transceiver 130 may include one or more antennas for transmitting and / or receiving wireless signals.
  • the above-described techniques may be implemented with modules (processes, functions, and so on) that perform the functions described above.
  • the modules may be stored in the memory 120 and executed by the processor 110.
  • the memory 120 may be internal or external to the processor 110 and may be coupled with the processor 110 in a variety of well known ways.

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Abstract

L'invention concerne un procédé qui permet de déterminer un type de créneau temporel dans un système de communication sans fil pour un terminal et un terminal utilisant ledit procédé. Le procédé consiste à recevoir, d'une station de base, des informations d'indication du type de créneau temporel ; à déterminer le type de créneau temporel parmi une pluralité de types de créneau temporel, en fonction des informations d'indication du type de créneau temporel, la pluralité de types de créneau temporel comprenant : un premier type de créneau temporel dans lequel tous les symboles constituant le créneau sont des symboles flexibles ; un deuxième type de créneau temporel, dans lequel tous les symboles constituant le créneau sont utilisés en tant que liaison montante ; un troisième type de créneau temporel, dans lequel le nombre de symboles utilisés en tant que liaison montante parmi les symboles constituant le créneau dépasse le nombre de symboles qui pourraient être utilisés pour une liaison descendante ; un quatrième type de créneau temporel, dans lequel le nombre de symboles utilisés en tant que liaison descendante parmi les symboles constituant le créneau dépasse le nombre de symboles qui pourraient être utilisés pour une liaison montante ; un cinquième type de créneau temporel, dans lequel tous les symboles constituant le créneau sont utilisés en tant que liaison descendante.
PCT/KR2018/009163 2017-08-11 2018-08-10 Procédé de détermination de type de créneau temporel pour terminal dans un système de communication sans fil et terminal utilisant ledit procédé Ceased WO2019031909A1 (fr)

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CN111225444B (zh) * 2020-01-03 2022-08-30 北京紫光展锐通信技术有限公司 数据传输方法及装置
CN116506946A (zh) * 2022-01-21 2023-07-28 大唐移动通信设备有限公司 一种资源配置方法、装置及终端及网络侧设备
WO2025030560A1 (fr) * 2023-08-10 2025-02-13 北京小米移动软件有限公司 Procédé permettant de déterminer une ressource de transmission de liaison montante, ainsi qu'appareil de communication, dispositif de communication et support de stockage

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