WO2019168354A1 - Procédé d'émission par un terminal d'un srs dans un système de communication sans fil, et appareil correspondant - Google Patents

Procédé d'émission par un terminal d'un srs dans un système de communication sans fil, et appareil correspondant Download PDF

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Publication number
WO2019168354A1
WO2019168354A1 PCT/KR2019/002390 KR2019002390W WO2019168354A1 WO 2019168354 A1 WO2019168354 A1 WO 2019168354A1 KR 2019002390 W KR2019002390 W KR 2019002390W WO 2019168354 A1 WO2019168354 A1 WO 2019168354A1
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srs
terminal
type
base station
beam management
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PCT/KR2019/002390
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English (en)
Korean (ko)
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박종현
염건일
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엘지전자 주식회사
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Publication of WO2019168354A1 publication Critical patent/WO2019168354A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • 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

Definitions

  • the present invention relates to a wireless communication system, and more particularly, to a method for transmitting an SRS and an apparatus supporting the same.
  • Mobile communication systems have been developed to provide voice services while ensuring user activity.
  • the mobile communication system has expanded not only voice but also data service, and the explosive increase in traffic causes shortage of resources and users require faster services. Therefore, a more advanced mobile communication system is required. .
  • the present specification proposes a method of transmitting a sounding reference signal (SRS) in a wireless communication system.
  • SRS sounding reference signal
  • the present specification proposes a method of determining whether to use a guard period between a plurality of SRS resources using information on the use of the SRS.
  • the present specification proposes a method of transmitting a sounding reference signal (SRS) by a terminal in a wireless communication system.
  • the method performed by the terminal includes receiving SRS configuration information through higher layer signaling and transmitting the SRS to a base station based on the SRS configuration information.
  • the SRS configuration information includes information about the usage of the SRS, and based on the information about the usage of the SRS, determining whether to use a guard period associated with a plurality of SRS resources. It may be characterized by.
  • the use of the SRS may be any one of a beam managemnet, a codebook, a non-codebook, and an antenna switching.
  • whether or not to use the guard interval may be determined according to a beam management type.
  • the beam management type is a type 1 indicating type of beam management for selecting a reception beam of a base station and a transmission beam of the terminal, and the reception beam of the base station. It may be one of a type 2 indicating beam management for selecting a type and a type 3 indicating beam management for selecting a transmission beam of the terminal.
  • the guard period may be set to be used for the plurality of SRS resources.
  • the guard interval when the SRS is set for use of the codebook, the guard interval is set to be used for the plurality of SRS resources, and when the SRS is set for use of the non-codebook, The guard interval may be set not to be used for the plurality of SRS resources.
  • the terminal includes a transceiver for transmitting and receiving a wireless signal, and a processor functionally connected to the transceiver,
  • the processor may be configured to receive SRS configuration information through higher layer signaling and to transmit an SRS to a base station based on the SRS configuration information, wherein the SRS configuration information is used for the purpose of the SRS. and information about usage, and based on information about the use of the SRS, it may be characterized by determining whether to use a guard period associated with a plurality of SRS resources (resource).
  • the use of the SRS may be any one of a beam managemnet, a codebook, a non-codebook, and an antenna switching.
  • whether to use the guard period may be determined according to a beam management type.
  • the beam management type is a type 1 indicating type of beam management for selecting a reception beam of a base station and a transmission beam of the terminal, and the reception beam of the base station. It may be one of a type 2 indicating beam management for selecting a type and a type 3 indicating beam management for selecting a transmission beam of the terminal.
  • the guard period may be configured to be used for the plurality of SRS resources.
  • the guard interval is set to be used for the plurality of SRS resources
  • the guard period may be set not to be used for the plurality of SRS resources.
  • Figure 1 shows an example of the overall system structure of the NR to which the method proposed in this specification can be applied.
  • FIG. 2 illustrates a relationship between an uplink frame and a downlink frame in a wireless communication system to which the method proposed in the present specification may be applied.
  • FIG 3 shows an example of a frame structure in an NR system.
  • FIG. 4 shows an example of a resource grid supported by a wireless communication system to which the method proposed in this specification can be applied.
  • FIG. 5 shows examples of an antenna port and a number of resource grids based on each numerology to which the method proposed in this specification can be applied.
  • FIG. 6 shows an example of a self-contained structure to which the method proposed in this specification can be applied.
  • FIG. 7 is a diagram illustrating SRS resource indication for an aggregated SRS region.
  • FIG. 8 is a diagram illustrating an example of determining an SRS resource location.
  • SRS sounding reference signal
  • SRS sounding reference signal
  • FIG. 11 illustrates a block diagram of a wireless communication device to which the methods proposed herein can be applied.
  • FIG. 12 illustrates a block diagram of a communication device according to an embodiment of the present invention.
  • FIG. 13 is a diagram illustrating an example of an RF module of a wireless communication device to which the method proposed in this specification can be applied.
  • FIG. 14 is a diagram illustrating still another example of an RF module of a wireless communication device to which the method proposed in this specification can be applied.
  • a base station has a meaning as a terminal node of a network that directly communicates with a terminal.
  • 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. That is, it is obvious that various operations performed for communication with a terminal in a network composed of a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station.
  • a base station (BS) is a fixed station, a Node B, an evolved-NodeB (eNB), a base transceiver system (BTS), an access point (AP), a general NB (generation NB) May be replaced by such terms.
  • a 'terminal' may be fixed or mobile, and may include a user equipment (UE), a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), and an AMS ( Advanced Mobile Station (WT), Wireless Terminal (WT), Machine-Type Communication (MTC) Device, Machine-to-Machine (M2M) Device, Device-to-Device (D2D) Device, etc.
  • UE user equipment
  • MS mobile station
  • UT user terminal
  • MSS mobile subscriber station
  • SS subscriber station
  • AMS Advanced Mobile Station
  • WT Wireless Terminal
  • MTC Machine-Type Communication
  • M2M Machine-to-Machine
  • D2D Device-to-Device
  • downlink means communication from a base station to a terminal
  • uplink means communication from a terminal to a base station.
  • a transmitter may be part of a base station, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal and a receiver may be part of a base station.
  • 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
  • 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 a universal mobile telecommunications system (UMTS).
  • 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
  • LTE-A (advanced) is the evolution of 3GPP LTE.
  • 5G NR defines Enhanced Mobile Broadband (eMBB), Massive Machine Type Communications (MMTC), Ultra-Reliable and Low Latency Communications (URLLC), and vehicle-to-everything (V2X) according to usage scenarios.
  • eMBB Enhanced Mobile Broadband
  • MMTC Massive Machine Type Communications
  • URLLC Ultra-Reliable and Low Latency Communications
  • V2X vehicle-to-everything
  • the 5G NR standard is divided into standalone (SA) and non-standalone (NSA) according to co-existence between the NR system and the LTE system.
  • 5G NR supports various subcarrier spacings, and supports CP-OFDM in downlink, CP-OFDM and DFT-s-OFDM in uplink (SC-OFDM).
  • Embodiments of the present invention may be supported by standard documents disclosed in at least one of IEEE 802, 3GPP, and 3GPP2, which are wireless access systems. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.
  • next-generation wireless access technologies can provide faster service to more users than traditional communication systems (or traditional radio access technologies) (e.g., enhanced mobile broadband communication). ) Needs to be considered.
  • a design of a communication system considering a machine type communication (MTC) that provides a service by connecting a plurality of devices and objects has been discussed.
  • a design of a communication system eg, Ultra-Reliable and Low Latency Communication (URLLC)
  • URLLC Ultra-Reliable and Low Latency Communication
  • NR New RAT
  • NR system the radio communication system to which the NR is applied.
  • eLTE eNB An eLTE eNB is an evolution of an eNB that supports connectivity to EPC and NGC.
  • gNB Node that supports NR as well as connection with NGC.
  • New RAN A radio access network that supports NR or E-UTRA or interacts with NGC.
  • Network slice A network slice defined by the operator to provide an optimized solution for specific market scenarios that require specific requirements with end-to-end coverage.
  • Network function is a logical node within a network infrastructure with well-defined external interfaces and well-defined functional behavior.
  • NG-C Control plane interface used for the NG2 reference point between the new RAN and NGC.
  • NG-U User plane interface used for the NG3 reference point between the new RAN and NGC.
  • Non-standalone NR A deployment configuration where a gNB requires an LTE eNB as an anchor for control plane connection to EPC or an eLTE eNB as an anchor for control plane connection to NGC.
  • Non-Standalone E-UTRA Deployment configuration in which the eLTE eNB requires gNB as an anchor for control plane connection to NGC.
  • User plane gateway The endpoint of the NG-U interface.
  • Figure 1 shows an example of the overall system structure of the NR to which the method proposed in this specification can be applied.
  • the NG-RAN consists of gNBs that provide control plane (RRC) protocol termination for the NG-RA user plane (new AS sublayer / PDCP / RLC / MAC / PHY) and UE (User Equipment).
  • RRC control plane
  • the gNBs are interconnected via an X n interface.
  • the gNB is also connected to the NGC via an NG interface.
  • the gNB is connected to an Access and Mobility Management Function (AMF) through an N2 interface and to a User Plane Function (UPF) through an N3 interface.
  • AMF Access and Mobility Management Function
  • UPF User Plane Function
  • the numerology may be defined by subcarrier spacing and cyclic prefix overhead.
  • the plurality of subcarrier spacings may be defined as an integer N (or a basic subcarrier spacing). Can be derived by scaling. Further, even if it is assumed that very low subcarrier spacing is not used at very high carrier frequencies, the used numerology may be selected independently of the frequency band.
  • OFDM Orthogonal Frequency Division Multiplexing
  • OFDM numerologies supported in the NR system may be defined as shown in Table 1.
  • the size of the various fields in the time domain Is expressed as a multiple of the time unit. From here, ego, to be.
  • Downlink and uplink transmissions It consists of a radio frame having a section of (radio frame).
  • each radio frame is It consists of 10 subframes having a section of.
  • FIG. 2 illustrates an uplink frame and a downlink frame in a wireless communication system to which the method proposed in the present specification can be applied. Indicates a relationship between
  • the transmission of an uplink frame number i from a user equipment (UE) is greater than the start of the corresponding downlink frame at the corresponding UE. You must start before.
  • slots within a subframe Numbered in increasing order of within a radio frame They are numbered in increasing order of.
  • One slot is Consists of consecutive OFDM symbols of, Is determined according to the numerology and slot configuration used. Slot in subframe Start of OFDM symbol in the same subframe Is aligned with the beginning of time.
  • Not all terminals can transmit and receive at the same time, which means that not all OFDM symbols of a downlink slot or an uplink slot can be used.
  • Table 2 shows the number of OFDM symbols per slot in a normal CP. ), The number of slots per radio frame ( ), The number of slots per subframe ( Table 3 shows the number of OFDM symbols per slot, the number of slots per radio frame, and the number of slots per subframe in the extended CP.
  • mini-slot may consist of two, four or seven symbols, and may consist of more or fewer symbols.
  • an antenna port In relation to physical resources in the NR system, an antenna port, a resource grid, a resource element, a resource block, a carrier part, etc. Can be considered.
  • the antenna port is defined so that the channel on which the symbol on the antenna port is carried can be inferred from the channel on which another symbol on the same antenna port is carried. If the large-scale property of the channel on which a symbol on one antenna port is carried can be deduced from the channel on which the symbol on another antenna port is carried, then the two antenna ports are quasi co-located or QC / QCL. quasi co-location relationship.
  • the wide range characteristics include one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.
  • FIG. 4 shows an example of a resource grid supported by a wireless communication system to which the method proposed in this specification can be applied.
  • one subframe consists of 142 ⁇ OFDM symbols, but is not limited thereto.
  • the transmitted signal is One or more resource grids composed of subcarriers, and Is described by the OFDM symbols of. From here, to be. remind Denotes the maximum transmission bandwidth, which may vary between uplink and downlink as well as numerologies.
  • the numerology And one resource grid for each antenna port p.
  • FIG. 5 shows examples of an antenna port and a number of resource grids based on each numerology to which the method proposed in this specification can be applied.
  • each element of the resource grid for antenna port p is referred to as a resource element and is an index pair Uniquely identified by From here, Is the index on the frequency domain, Refers to the position of a symbol within a subframe. Index pair when referring to a resource element in a slot This is used. From here, to be.
  • Numerology Resource elements for antenna and antenna port p Is a complex value Corresponds to If there is no risk of confusion, or if no specific antenna port or numerology is specified, the indices p and Can be dropped, so the complex value is or This can be
  • the physical resource block (physical resource block) in the frequency domain It is defined as consecutive subcarriers.
  • Point A serves as a common reference point of the resource block grid and can be obtained as follows.
  • OffsetToPointA for the PCell downlink indicates the frequency offset between the lowest subcarrier of the lowest resource block and point A overlapping with the SS / PBCH block used by the UE for initial cell selection, and a 15 kHz subcarrier spacing for FR1 and Expressed in resource block units assuming a 60 kHz subcarrier spacing for FR2;
  • absoluteFrequencyPointA indicates the frequency-location of point A expressed as in absolute radio-frequency channel number (ARFCN).
  • Common resource blocks set subcarrier spacing It is numbered from zero up in the frequency domain for.
  • Physical resource blocks are zero-based within the bandwidth part (BWP). Numbered until, Is the number of the BWP. Physical resource blocks on BWP i And common resource blocks Can be given by Equation 2 below.
  • the time division duplex (TDD) structure considered in the NR system is a structure that processes both uplink (UL) and downlink (DL) in one slot (or subframe). This is to minimize latency of data transmission in a TDD system, and the structure may be referred to as a self-contained structure or a self-contained slot.
  • one transmission unit eg, slot, subframe
  • 14 orthogonal frequency division multiplexing (OFDM) symbols e.g., OFDM
  • an area 602 means a downlink control region
  • an area 604 means an uplink control region.
  • an area other than the area 602 and the area 604 may be used for transmitting downlink data or uplink data.
  • uplink control information and downlink control information may be transmitted in one self-contained slot.
  • uplink data or downlink data may be transmitted in one self-contained slot.
  • downlink transmission and uplink transmission are sequentially performed in one self-contained slot, and transmission of downlink data and reception of uplink ACK / NACK may be performed.
  • a process of switching from a transmission mode to a reception mode by a base station (eNodeB, eNB, gNB) and / or a terminal (User Equipment) a time gap for switching from a reception mode to a transmission mode is required.
  • some OFDM symbol (s) may be set to a guard period (GP).
  • multiple (or multiple) antennas may be installed in the same area.
  • the wavelength is about 1cm
  • the antennas are installed at 0.5 lambda intervals on a panel of 5cm x 5cm according to the 2-dimension arrangement, a total of 100 Antenna elements may be installed.
  • a method of increasing coverage or increasing throughput may be considered by increasing beamforming (BF) gain using a plurality of antenna elements.
  • BF beamforming
  • TXRU Transceiver Unit
  • the method of installing TXRU in all antenna elements may be ineffective in terms of price. Accordingly, a method of mapping a plurality of antenna elements to one TXRU and controlling the direction of the beam by using an analog phase shifter may be considered.
  • hybrid beamforming with B TXRUs which is less than Q antenna elements, may be considered as an intermediate form between digital beamforming and analog beamforming.
  • the direction of the beam capable of transmitting signals at the same time may be limited to B or less.
  • a terminal supporting partial reciprocity may acquire downlink (DL) channel state information (CSI) through transmission of a sounding reference signal (SRS) in a situation such as a time division duplex (TDD).
  • DL downlink
  • SRS sounding reference signal
  • LTE Long-Term Evolution
  • NR New Radio
  • a guard period may need to be generally set to about 15 ms between SRS resources in order to switch the tx antenna of the terminal.
  • the guard period may mean a resource (ie, a certain resource period) required to support antenna switching and the like.
  • the length of the guard period (ie, the number of symbols) may be set in the NR system as shown in Table 4 below.
  • the guard period may vary depending on the parameter ⁇ that determines the numerology (eg, subcarrier spacing, etc.).
  • the terminal may be configured not to transmit any other signal.
  • the guard period can be used completely for tx antenna switching.
  • intra-slot antenna switching may be supported in NR.
  • the UE When the UE is configured / instructed to transmit aperiodic SRS with intra-slot antenna switching, the UE transmits SRS using different tx antennas for each designated SRS resource.
  • the guard period described above may be provided between each resource.
  • the guard period described above may be set between SRS resources in one SRS resource set.
  • Such a phenomenon may be intensified as the guard period is increased to 2 symbols in the case of subcarrier spacing 120 kHz.
  • a user equipment For example, a user equipment (UE) needs about 5 ms for the transition of tx power. For this reason, similar guard periods are required in the case of UL beam management using beams using different tx powers. In addition, a situation such as beam management in which beams using different tx antennas are used may be considered.
  • the terminal may transmit some SRS resources to another slot. have.
  • a method of setting and / or determining a length of a guard interval, etc. when the guard interval is used and the guard interval (hereinafter, the first embodiment), and when the guard interval is set
  • a method for performing SRS transmission (hereinafter, referred to as a second embodiment) is proposed in consideration of slots in which SRS resources are set.
  • a description will be given of a method of setting and / or determining a guard interval length (ie, the number of symbols of a guard interval) when the guard interval is used and / or when the guard interval is used in SRS transmission.
  • a guard interval length ie, the number of symbols of a guard interval
  • the base station may directly set the guard period for each resource set or resource (between resources) and designate the terminal.
  • the base station sets a 1 symbol guard period between 1-th SRS resource (or SRS resource set) and 2-th SRS resource, and between 2-th SRS resource and 3-th SRS resource. You can set a 2 symbol guard period.
  • the SRS resource may mean an SRS resource set.
  • Such a method may be implemented by setting the positions of the SRS resources at predetermined intervals and / or set / indicated intervals between the SRS resources included in the SRS resource set.
  • this may additionally inform the UE whether or not to use the corresponding guard period and / or the length of the guard period as MAC / DCI.
  • the base station sets the different guard period (set) to the terminal for better flexibility, and selects which of the additionally set guard period (set) to the terminal in the same way as MAC / DCI Can be used.
  • the base station sets a multiple SRS resource set having a different guard period configuration to the terminal and selects an SRS resource set to be transmitted by the terminal through an aperiodic SRS trigger from among the multiple SRS resource sets.
  • the base station may identify the position of the SRS resources included in the SRS resource set through the symbol index and the guard period of the reference SRS resource.
  • the SRS resource set includes four SRS resources
  • one of the four SRS resources may be regarded as a reference SRS resource.
  • the base station may transmit a symbol index to the terminal for the reference SRS resource, and transmit a guard period.
  • the terminal may check the positions of the remaining three SRS resources included in the SRS resource set by shifting the guard period by the guard period from the position of the reference SRS resource specified by the reference SRS resource through the symbol index of the reference SRS resource.
  • the terminal may drop the corresponding SRS resource or shift the corresponding SRS resource when the position according to the symbol index of each of the SRS resources overlaps with the guard period.
  • the terminal may be configured to transmit the SRS with a guard period between SRS resources regardless of the base station.
  • the terminal may not perform an additional operation on this.
  • the base station may perform blind detection by a method such as energy detection to determine whether the SRS is transmitted and the guard period is used for the corresponding symbol.
  • the terminal transmits the SRS with a guard period between SRS resources regardless of the base station.
  • the terminal may inform the base station of whether the guard period is used or / and the length of the guard period through the PUCCH / PUSCH.
  • And / or the UE may transmit the use of the guard period and / or the length of the guard period to the base station (recommend signal or request signal) when the guard period needs to be changed.
  • the base station may check whether the guard period is used and / or the length of the guard period and feedback whether the terminal is allowed. Thereafter, when the guard period change is allowed, the terminal may transmit the SRS resource to the base station based on whether the corresponding guard period is used and / or the length of the guard period.
  • whether the guard interval is used and / or the guard interval length in the case of using the guard interval may be determined according to the use of the SRS (eg, RRC parameter usage, etc.).
  • the base station may set the use of the SRS resource set through the RRC parameter usage.
  • the use of the SRS resource set (or SRS resource) may be selected from one of ⁇ Beam management, CodeBook, Non-CodeBook, Antenna switching ⁇ .
  • different beams may be used between the SRS resources (for example, beam manage U1 / U3).
  • the beam management may be one of type 1 (eg, U1 phase), type 2 (eg, U2 phase), and type 3 (eg, U3 phase).
  • type 1 eg, U1 phase
  • type 2 eg, U2 phase
  • type 3 eg, U3 phase
  • Type 1 may mean a method of mutually selecting the rx / tx beam of the base station and the terminal. In this case, a guard period may be used because different beams are transmitted for each SRS resource.
  • Type 2 may mean a method of determining the rx beam of the base station. At this time, the tx beam of the terminal is maintained the same between the SRS resources. Thus guard periods may not be used.
  • Type 3 may mean a method of determining the tx beam of the terminal. In this case, a guard period may be used because different beams are transmitted for each SRS resource.
  • U2 and U3 may be distinguished by an RRC parameter SpatialRelationInfo.
  • SpatialRelationInfo is beam reference information set for each SRS resource. That is, it may be U3 when the SpatialRelationInfo is set differently for each SRS resource set included in the beam management resource set, and may be U2 when all are set the same.
  • a guard period may be applied. If the SpatialRelationInfo of each of the SRS resource sets is the same, the guard period may not be applied.
  • a guard period may be applied to the corresponding SRS resource. Or, in this case, the guard period may be applied only to adjacent SRS resources having different SpatialRelationInfo.
  • a guard period may be applied therebetween.
  • the length of the guard period may be determined using Table 4 as in the case of using the antenna switching.
  • the length of the guard period may be determined by a table (a table predetermined for the purpose of beam management) to have a different length depending on the type of the beam management.
  • the type of beam management may mean a method of determining the rx beam of the base station and / or the tx beam of the terminal (eg, U1, U2, and U3).
  • the SRS resource may be set for the purpose of a codebook or a non-codebook.
  • a maximum of 2 SRS resources may be set in one SRS resource set. Since different tx beams may be used between each SRS resource, a guard period may be set.
  • a maximum of 4 SRS resources may be set in one SRS resource set.
  • Each resource represents a UL tx layer and thus is used in a situation in which the same beam is used. Thus, the guard period may not be used.
  • the SRS resource may be set for the purpose of antenna switching.
  • time may be required for the antenna transition. Therefore, the guard period described above may be used between the SRS resources included in the corresponding resource set.
  • / or, whether or not to use the guard interval and / or the guard interval length in the case of using the guard interval may be determined according to the numerology set for the terminal.
  • guard periods / lengths may be set / defined for different numerology according to the use of the above-described SRS.
  • the guard period may be used (eg, SRS for beam management).
  • the length of the guard period may be 1 symbol regardless of numerology.
  • / or, whether the guard interval is used and / or the guard interval length when the guard interval is used may be determined according to the relative position of the SRS with another channel and / or a reference signal (RS).
  • RS reference signal
  • the SRS resource transmitted in the corresponding slot and the PUSCH transmitted in the corresponding slot Guard periods may be used between (or PUCCH).
  • the offset may mean a slot offset from a slot (or symbol) triggered by downlink control information (DCI) to a slot (or symbol) in which a corresponding SRS resource is transmitted.
  • DCI downlink control information
  • This operation may not be used in the slot designated as offset. This may be defined assuming that the UE preferentially transmits the SRS using the same antenna / beam as the PUSCH.
  • a guard period may be set, and when the slot offset is zero, the SRS resource or the PUSCH may be dropped according to the priority between them.
  • a guard period may necessarily be placed between the SRS and the PUCCH.
  • This guard period may take precedence over the SRS location (SRS resource location symbol index indicated by RRC) determined in other ways. In other words, if the guard period defined in this way and the SRS location overlap, the SRS is not transmitted in the symbol.
  • the SRS transmission may be dropped or the SRS resource may be mapped after the corresponding guard period.
  • the corresponding SRS may be shifted or mapped immediately after the guard period.
  • guard period may be defined to be allocated or arranged at a specific position in the SRS resource set.
  • a guard period for changing the UE tx antenna may be included in the SRS resource set for beam management. This may be set in particular according to the number of tx / rx antennas of the terminal, and the guard period as many as the number of rx antennas / tx antenna-1 may be set in the SRS resource set. The number of SRS resources divided by each guard period may be equal to the number of tx antennas.
  • a large value of the guard period may be applied, and when the beam management is small, a small value of the guard period may be applied to allow flexible operation.
  • / or, whether or not to use the guard interval and / or the guard interval length in the case of using the guard interval may be determined according to the UE capability (UE capability). In this case, whether the guard interval is required as the capability information of the terminal may be reported to the base station. Such a scheme may be reported separately according to the above-described SRS usage, numerology and / or relative position.
  • the above-described methods may be equally used among all SRS resources set in the entire SRS resource set. Alternatively, the above-described methods may be used independently between resources for greater flexibility.
  • the actual transmission position of the SRS resource (particularly, to which slot corresponds to the slot corresponding to the designated SRS offset or to which slot thereafter) can be determined through the following methods.
  • an aggregated SRS region may be defined as a union of SRS regions in a multi-slot.
  • the base station may set the SRS resource location for the aggregated SRS region for the SRS resource (set) in which the guard period may be set.
  • FIG. 7 is a diagram illustrating SRS resource indication for an aggregated SRS region.
  • corresponding aggregated SRS regions 711 and 721 may be defined for two consecutive slots 710 and 720.
  • the SRS location may be selected as one of the 1st to 12th symbols instead of the existing 1st to 6th symbols from the end of slot.
  • the terminal may transmit the SRS at a location corresponding to the aggregated SRS resource location instead of the configured SRS resource location.
  • the location setting for the SRS region of the single-slot may be omitted.
  • the SRS resource location for the corresponding aggregated SRS region may be interpreted and transmitted as the SRS resource location for the single SRS region.
  • the actual SRS transmission when the guard period is not used is (configured SRS location) / 2. May be sent at a location such as
  • the UE transmits the SRS with a guard period between SRS resources regardless of the base station, and does not perform an additional operation.
  • the base station may perform blind detection by a method such as energy detection to determine whether the SRS is transmitted to the corresponding symbol.
  • the base station can determine whether the guard period is used.
  • the terminal may transmit the SRS with a guard period between SRS resources regardless of the base station.
  • the terminal may inform the base station of the transmission location of each SRS resource through the PUCCH / PUSCH.
  • the UE looks specifically at a method for setting and / or determining a transmission location of an SRS resource according to a guard interval by a preset (or promised, defined) rule.
  • the base station sets two or more SRS resources at the same location, and when the guard period is used, one of them may be transmitted to the SRS region of the next available UL slot.
  • the position of the SRS resource in the slot may be a position set in the corresponding SRS resource.
  • the SRS transmitted to the next slot may be an SRS resource having a larger SRS resource id. If the guard period is not used, one of the two SRS resources may not be transmitted. This SRS may be an SRS resource having a larger SRS resource id.
  • an aggregated SRS region is defined as the union of the multi-slot SRS regions.
  • the SRS resource location in the aggregated SRS region may be mapped according to the configured SRS resource location configured in the SRS region of 1 slot.
  • Aggregated SRS location configured SRS resource location * (x + y)
  • the guard period according to the first embodiment and / or the second embodiment described above may be equally applied to another channel or RS (eg, PUCCH, PUSCH, DMRS) and another channel or RS except for the SRS.
  • another channel or RS eg, PUCCH, PUSCH, DMRS
  • it may be applied alone or in combination.
  • the above patent has described the proposed method based on the 3GPP New RAT system for convenience of description, but the scope of the system to which the proposed method is applied is other than the 3GPP New RAT system (eg LTE, UTRA, etc.), in particular 5G and It can also be extended to the candidate technology.
  • 9 is a flowchart illustrating an operation of a terminal for transmitting a sounding reference signal (SRS) to which the method proposed in the present specification can be applied. 9 is merely for convenience of description and does not limit the scope of the invention.
  • SRS sounding reference signal
  • the terminal receives SRS configuration information through higher layer signaling (S910).
  • the SRS configuration information includes information on SRS usage (eg, RRC parameter srs-uage).
  • the use of the SRS may be any one of beam managemnet, codebook, non-codebook, and antenna switching.
  • the terminal transmits the SRS to the base station based on the SRS configuration information (S920).
  • the terminal may determine and / or set whether to use a guard period associated with a plurality of SRS resources based on the information about the SRS usage included in the SRS configuration information.
  • whether the guard period is used or not may be determined and / or set according to a beam management type.
  • the beam management type includes a type 1 for selecting a reception beam of a base station and a transmission beam of the terminal, a type 2 for selecting a reception beam of the base station, and a transmission beam of the terminal. It may be any one of type 3 to select.
  • Type 1 may mean a method of mutually selecting the rx / tx beam of the base station and the terminal. In the case of Type 1, a guard period may be used because different beams are transmitted for each SRS resource.
  • the use of the guard period may mean that the guard period is set and / or determined by the terminal.
  • type 2 may mean a method of determining the rx beam of the base station. At this time, the tx beam of the terminal is maintained the same between the SRS resources. Thus guard periods may not be used.
  • the use of the guard period may mean that the guard period is set and / or determined not to be used by the terminal.
  • type 3 may mean a method of determining the tx beam of the terminal.
  • a guard period may be used because different beams are transmitted for each SRS resource.
  • a guard period between the plurality of SRS resources may be used.
  • the guard interval is set for the plurality of SRS resources, and when the SRS is set for the purpose of the non-codebook, the guard interval is configured for the plurality of SRS resources. Can be set to not be used.
  • At most 2 SRS resources may be set in one SRS resource set. Since different tx beams may be used between each SRS resource, a guard period may be set.
  • a maximum of 4 SRS resources may be set in one SRS resource set.
  • Each resource represents a UL tx layer and thus is used in a situation in which the same beam is used. Thus, no guard period is used.
  • the UE needs time for the antenna transition, and thus, the guard period may be used among the SRS resources included in the corresponding resource set.
  • the above-described operation of the terminal may be specifically implemented by the terminal device 1120 illustrated in FIG. 11 of the present specification.
  • the above-described operation of the terminal may be performed by the processor 1121 and / or the RF unit 1123.
  • the processor 1121 receives SRS configuration information through higher layer signaling through the RF unit 1123 (S910).
  • the SRS configuration information includes information on SRS usage (eg, RRC parameter srs-uage).
  • the use of the SRS may be any one of beam managemnet, codebook, non-codebook, and antenna switching.
  • the processor 1121 transmits the SRS to the base station 1110 based on the SRS configuration information through the RF unit 1123 (S920).
  • the processor 1121 may determine and / or set whether to use a guard period associated with a plurality of SRS resources based on the information on the SRS usage included in the SRS configuration information. .
  • whether the guard period is used or not may be determined and / or set according to a beam management type.
  • the beam management type selects a reception beam of the base station 1110 and a transmission beam of the terminal 1120 and a reception beam of the base station 1110.
  • Type 1 may refer to a method of mutually selecting the rx / tx beam of the base station 1110 and the terminal 1120. In the case of Type 1, a guard period may be used because different beams are transmitted for each SRS resource.
  • guard period may mean that the guard period is set and / or determined by the processor 1121.
  • type 2 may mean a method of determining the rx beam of the base station 1110. At this time, the tx beam of the terminal 1120 is maintained the same between SRS resources. Thus guard periods may not be used.
  • the deprecation of the guard period may mean that the guard period is set and / or determined not to be used by the processor 1121.
  • type 3 may refer to a method of determining the tx beam of the terminal 1120.
  • a guard period may be used because different beams are transmitted for each SRS resource.
  • a guard period between the plurality of SRS resources may be used.
  • the guard interval is set for the plurality of SRS resources, and when the SRS is set for the purpose of the non-codebook, the guard interval is configured for the plurality of SRS resources. Can be set to not be used.
  • At most 2 SRS resources may be set in one SRS resource set. Since different tx beams may be used between each SRS resource, a guard period may be set.
  • a maximum of 4 SRS resources may be set in one SRS resource set.
  • Each resource represents a UL tx layer and thus is used in a situation in which the same beam is used. Thus, no guard period is used.
  • the processor 1121 needs a time for the antenna transition as described above, and thus, the processor 1121 is configured to use the aforementioned guard period among the SRS resources included in the corresponding resource set. You can decide.
  • SRS sounding reference signal
  • the base station transmits SRS configuration information through higher layer signaling (S1010).
  • the SRS configuration information includes information on SRS usage (eg, RRC parameter srs-uage).
  • the use of the SRS may be any one of beam managemnet, codebook, non-codebook, and antenna switching.
  • the base station receives the SRS from the terminal based on the SRS configuration information (S1020).
  • whether or not to use a guard period between a plurality of SRS resources may be determined by the terminal based on information on the use of the SRS.
  • the beam management type includes a type 1 selecting a reception beam of a base station and a transmission beam of a terminal, a type 2 selecting a reception beam of a base station, and a type 3 selecting a transmission beam of a terminal. It can be either.
  • the guard period may be configured to be used for the plurality of SRS resources.
  • the guard interval is set to be used for the plurality of SRS resources, and when the SRS is set for the purpose of the non-codebook, the guard interval is the plurality of It may be set not to be used for SRS resources of.
  • the UE needs time for the antenna transition, and thus, the guard period may be used among the SRS resources included in the corresponding resource set.
  • the operation of the base station shown in FIG. 10 is the same as that of the base station described with reference to FIGS.
  • the above-described operation of the base station may be specifically implemented by the base station apparatus 1110 shown in FIG. 11 of the present specification.
  • the above-described operation of the base station may be performed by the processor 1111 and / or the RF unit 1113.
  • the processor 1111 transmits SRS configuration information through higher layer signaling through the RF unit 1113 (S1010).
  • the SRS configuration information includes information on SRS usage (eg, RRC parameter srs-uage).
  • the use of the SRS may be any one of beam managemnet, codebook, non-codebook, and antenna switching.
  • the processor 1111 receives the SRS from the terminal 1120 based on the SRS configuration information through the RF unit 1113 (S1020).
  • whether to use a guard period between a plurality of SRS resources may be determined and / or set by the processor 1121 of the terminal 1120 based on information on the use of the SRS.
  • the beam management type includes a type 1 for selecting a reception beam of a base station 1110 and a transmission beam of a terminal 1120, a type 2 for selecting a reception beam of a base station 1110, and a terminal. It may be any one of type 3 for selecting the transmission beam of 1120.
  • the guard period may be set and / or determined to be used for the plurality of SRS resources by the processor 1121 of the terminal 1120.
  • the guard interval is set and / or determined to be used for the plurality of SRS resources by the processor 1121, and the SRS is set for the purpose of the non-codebook.
  • the guard interval may be set and / or determined by the processor 1121 not to be used for the plurality of SRS resources.
  • the processor 1121 of the terminal 1120 uses the guard period described above among the SRS resources included in the corresponding resource set since time is required for the antenna transition as described above. And / or determine to.
  • FIG. 11 illustrates a block diagram of a wireless communication device to which the methods proposed herein can be applied.
  • a wireless communication system includes a base station 1110 and a plurality of terminals 1120 located in an area of a base station 1110.
  • the base station 1110 includes a processor 1111, a memory 1112, and an RF unit 1113.
  • the processor 1111 implements the functions, processes, and / or methods proposed in FIGS. 1 to 10. Layers of the air interface protocol may be implemented by the processor 1111.
  • the memory 1112 is connected to the processor 1111 and stores various information for driving the processor 1111.
  • the RF unit 1113 is connected to the processor 1111 to transmit and / or receive a radio signal.
  • the terminal 1120 includes a processor 1121, a memory 1222, and an RF unit 1223.
  • the processor 1121 implements the functions, processes, and / or methods proposed in FIGS. 1 to 10. Layers of the air interface protocol may be implemented by the processor 1121.
  • the memory 1122 is connected to the processor 1121 and stores various information for driving the processor 1121.
  • the RF unit 1123 is connected to the processor 1121 and transmits and / or receives a radio signal.
  • the memories 1112 and 1122 may be inside or outside the processors 1111 and 1121, and may be connected to the processors 1111 and 1121 by various well-known means.
  • the base station 1510 and / or the terminal 1520 may have a single antenna or multiple antennas.
  • FIG. 12 illustrates a block diagram of a communication device according to an embodiment of the present invention.
  • FIG. 12 is a diagram illustrating the terminal of FIG. 11 in more detail.
  • the terminal may include a processor (or a digital signal processor (DSP) 1210, an RF module (or RF unit) 1235, a power management module 1205). ), Antenna 1240, battery 1255, display 1215, keypad 1220, memory 1230, SIM card Subscriber Identification Module card) 1225 (this configuration is optional), speaker 1245, and microphone 1250.
  • the terminal may also include a single antenna or multiple antennas. Can be.
  • the processor 1210 implements the functions, processes, and / or methods proposed in FIGS. 1 to 10.
  • the layer of the air interface protocol may be implemented by the processor 1210.
  • the memory 1230 is connected to the processor 1210 and stores information related to the operation of the processor 1210.
  • the memory 1230 may be inside or outside the processor 1210 and may be connected to the processor 1210 by various well-known means.
  • the user enters command information, such as a telephone number, for example by pressing (or touching) a button on keypad 1220 or by voice activation using microphone 1250.
  • the processor 1210 receives the command information, processes the telephone number, and performs a proper function. Operational data may be extracted from the SIM card 1225 or the memory 1230. In addition, the processor 1210 may display command information or driving information on the display 1215 for the user to recognize and for convenience.
  • the RF module 1235 is connected to the processor 1210 to transmit and / or receive an RF signal.
  • the processor 1210 communicates command information to the RF module 1235 to transmit, for example, a radio signal constituting voice communication data to initiate communication.
  • the RF module 1235 is composed of a receiver and a transmitter for receiving and transmitting a radio signal.
  • the antenna 1240 functions to transmit and receive a radio signal.
  • the RF module 1235 may transmit the signal and convert the signal to baseband for processing by the processor 1210.
  • the processed signal may be converted into audible or readable information output through the speaker 1245.
  • FIG. 13 is a diagram illustrating an example of an RF module of a wireless communication device to which the method proposed in this specification can be applied.
  • FIG. 13 illustrates an example of an RF module that may be implemented in a frequency division duplex (FDD) system.
  • FDD frequency division duplex
  • the processor described in FIGS. 11 and 12 processes the data to be transmitted and provides an analog output signal to the transmitter 1310.
  • the analog output signal is filtered by a low pass filter (LPF) 1311 to remove images caused by digital-to-analog conversion (ADC), and an upconverter ( Up-converted from baseband to RF by a Mixer, 1312, and amplified by a Variable Gain Amplifier (VGA) 1313, the amplified signal is filtered by a filter 1314, and a power amplifier Further amplified by Amplifier (PA) 1315, routed through duplexer (s) 1350 / antenna switch (s) 1360, and transmitted via antenna 1370.
  • LPF low pass filter
  • ADC analog-to-analog conversion
  • VGA Variable Gain Amplifier
  • the antenna receives signals from the outside and provides the received signals, which are routed through the antenna switch (s) 1360 / duplexers 1350 and provided to the receiver 1320. .
  • the received signals are amplified by a Low Noise Amplifier (LNA) 1323, filtered by a bandpass filter 1324, and received from RF by a down converter (Mixer, 1325). Downconvert to baseband.
  • LNA Low Noise Amplifier
  • the down-converted signal is filtered by a low pass filter (LPF) 1326 and amplified by VGA 1327 to obtain an analog input signal, which is provided to the processor described in FIGS. 11 and 12.
  • LPF low pass filter
  • a local oscillator (LO) generator 1340 provides transmit and receive LO signals to the generate and up converter 1312 and down converter 1325, respectively.
  • LO local oscillator
  • Phase Locked Loop (PLL) 1330 also receives control information from the processor to generate transmit and receive LO signals at appropriate frequencies and provides control signals to LO generator 1340.
  • circuits shown in FIG. 13 may be arranged differently from the configuration shown in FIG. 13.
  • FIG. 14 is a diagram illustrating still another example of an RF module of a wireless communication device to which the method proposed in this specification can be applied.
  • FIG. 14 illustrates an example of an RF module that may be implemented in a time division duplex (TDD) system.
  • TDD time division duplex
  • the transmitter 1410 and receiver 1420 of the RF module in the TDD system have the same structure as the transmitter and receiver of the RF module in the FDD system.
  • the RF module of the TDD system will be described only for the structure that differs from the RF module of the FDD system, and the description of the same structure will be described with reference to FIG. 13.
  • the signal amplified by the transmitter's power amplifier (PA) 1415 is routed through a band select switch (1450), a band pass filter (BPF) 1460, and antenna switch (s) 1470. And is transmitted through the antenna 1480.
  • PA power amplifier
  • BPF band pass filter
  • s antenna switch
  • the antenna receives signals from the outside and provides the received signals, which are routed through the antenna switch (s) 1470, the band pass filter 1460 and the band select switch 1450. To the receiver 1420.
  • Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
  • an embodiment 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), and FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above.
  • the software code may be stored in memory and driven by the processor.
  • the memory may be located inside or outside the processor, and may exchange data with the processor by various known means.

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

Abstract

La présente invention concerne un procédé d'émission par un terminal d'un signal de référence de sondage (SRS) dans un système de communication sans fil, ainsi qu'un appareil correspondant. En particulier, le procédé, mis en œuvre par un terminal, comprend les étapes consistant : à recevoir des informations de configuration de SRS par l'intermédiaire d'une signalisation de couche supérieure ; et à envoyer le SRS à une station de base sur la base des informations de configuration de SRS, les informations de configuration de SRS comprenant des informations sur l'utilisation du SRS, et à déterminer, sur la base des informations sur l'utilisation du SRS, si une période de garde associée à une pluralité de ressources de SRS est mise en œuvre.
PCT/KR2019/002390 2018-02-27 2019-02-27 Procédé d'émission par un terminal d'un srs dans un système de communication sans fil, et appareil correspondant WO2019168354A1 (fr)

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CN111092708A (zh) * 2019-11-08 2020-05-01 中兴通讯股份有限公司 传输方法、装置、第一通信节点、第二通信节点及介质
WO2022043970A1 (fr) * 2020-08-31 2022-03-03 Telefonaktiebolaget Lm Ericsson (Publ) Période de garde améliorée entre des ressources de srs
WO2022188253A1 (fr) * 2021-03-12 2022-09-15 Oppo广东移动通信有限公司 Procédé de communication sans fil, dispositif terminal et dispositif de réseau
WO2023005833A1 (fr) * 2021-07-26 2023-02-02 华为技术有限公司 Procédé de transmission d'informations et appareil de communication
WO2023077493A1 (fr) * 2021-11-08 2023-05-11 Nokia Shanghai Bell Co., Ltd. Appareils, procédés, et supports lisibles par ordinateur pour transmission et mise en sourdine à la demande dans des systèmes de télécommunication
WO2023167554A1 (fr) * 2022-03-03 2023-09-07 삼성전자 주식회사 Procédé et dispositif de transmission et de réception répétitives de données de liaison montante pour la communication coopérative en réseau

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Publication number Priority date Publication date Assignee Title
CN111092708A (zh) * 2019-11-08 2020-05-01 中兴通讯股份有限公司 传输方法、装置、第一通信节点、第二通信节点及介质
WO2022043970A1 (fr) * 2020-08-31 2022-03-03 Telefonaktiebolaget Lm Ericsson (Publ) Période de garde améliorée entre des ressources de srs
WO2022188253A1 (fr) * 2021-03-12 2022-09-15 Oppo广东移动通信有限公司 Procédé de communication sans fil, dispositif terminal et dispositif de réseau
WO2023005833A1 (fr) * 2021-07-26 2023-02-02 华为技术有限公司 Procédé de transmission d'informations et appareil de communication
WO2023077493A1 (fr) * 2021-11-08 2023-05-11 Nokia Shanghai Bell Co., Ltd. Appareils, procédés, et supports lisibles par ordinateur pour transmission et mise en sourdine à la demande dans des systèmes de télécommunication
WO2023167554A1 (fr) * 2022-03-03 2023-09-07 삼성전자 주식회사 Procédé et dispositif de transmission et de réception répétitives de données de liaison montante pour la communication coopérative en réseau

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