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WO2021034051A1 - Procédé d'émission, au moyen d'un terminal, d'un signal de liaison montante dans un système de communication sans fil, et appareil associé - Google Patents

Procédé d'émission, au moyen d'un terminal, d'un signal de liaison montante dans un système de communication sans fil, et appareil associé Download PDF

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Publication number
WO2021034051A1
WO2021034051A1 PCT/KR2020/010896 KR2020010896W WO2021034051A1 WO 2021034051 A1 WO2021034051 A1 WO 2021034051A1 KR 2020010896 W KR2020010896 W KR 2020010896W WO 2021034051 A1 WO2021034051 A1 WO 2021034051A1
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WIPO (PCT)
Prior art keywords
information
resource
srs
terminal
transmission
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Ceased
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PCT/KR2020/010896
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English (en)
Korean (ko)
Inventor
차현수
윤석현
고현수
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LG Electronics Inc
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LG Electronics Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Definitions

  • the present disclosure relates to a method for a terminal to transmit an uplink signal in a wireless communication system and an apparatus therefor, and more particularly, to a method for a terminal to transmit a sounding reference signal (SRS) in a wireless communication system. And to an apparatus therefor.
  • SRS sounding reference signal
  • 5G can complement fiber-to-the-home (FTTH) and cable-based broadband (or DOCSIS) as a means of providing streams rated at hundreds of megabits per second to gigabits per second. This high speed is required to deliver TVs in 4K or higher (6K, 8K and higher) resolutions as well as virtual and augmented reality.
  • Virtual Reality (VR) and Augmented Reality (AR) applications involve almost immersive sports events. Certain application programs may require special network settings. In the case of VR games, for example, game companies may need to integrate core servers with network operators' edge network servers to minimize latency.
  • Automotive is expected to be an important new driving force in 5G, with many use cases for mobile communication to vehicles. For example, entertainment for passengers demands simultaneous high capacity and high mobility mobile broadband. The reason is that future users will continue to expect high-quality connections, regardless of their location and speed.
  • Another application example in the automotive field is an augmented reality dashboard. It identifies an object in the dark on top of what the driver is looking through the front window, and displays information that tells the driver about the distance and movement of the object overlaid.
  • wireless modules enable communication between vehicles, exchange of information between the vehicle and supporting infrastructure, and exchange of information between the vehicle and other connected devices (eg, devices carried by pedestrians).
  • the safety system allows the driver to lower the risk of accidents by guiding alternative courses of action to make driving safer.
  • the next step will be a remote controlled or self-driven vehicle. It is very reliable and requires very fast communication between different self-driving vehicles and between the vehicle and the infrastructure. In the future, self-driving vehicles will perform all driving activities, and drivers will be forced to focus only on traffic anomalies that the vehicle itself cannot identify.
  • the technical requirements of self-driving vehicles call for ultra-low latency and ultra-fast reliability to increase traffic safety to levels unachievable by humans.
  • Smart cities and smart homes referred to as smart society, will be embedded with high-density wireless sensor networks.
  • a distributed network of intelligent sensors will identify the conditions for cost and energy-efficient maintenance of a city or home.
  • a similar setup can be done for each household.
  • Temperature sensors, window and heating controllers, burglar alarms and appliances are all wirelessly connected. Many of these sensors are typically low data rates, low power and low cost. However, for example, real-time HD video may be required in certain types of devices for surveillance.
  • the smart grid interconnects these sensors using digital information and communication technologies to collect information and act accordingly. This information can include the behavior of suppliers and consumers, allowing smart grids to improve efficiency, reliability, economics, sustainability of production and the distribution of fuels such as electricity in an automated way.
  • the smart grid can also be viewed as another low-latency sensor network.
  • the health sector has many applications that can benefit from mobile communications.
  • the communication system can support telemedicine providing clinical care from remote locations. This can help reduce barriers to distance and improve access to medical services that are not consistently available in remote rural areas. It is also used to save lives in critical care and emergencies.
  • a wireless sensor network based on mobile communication may provide remote monitoring and sensors for parameters such as heart rate and blood pressure.
  • Wireless and mobile communications are becoming increasingly important in industrial applications. Wiring is expensive to install and maintain. Thus, the possibility of replacing cables with reconfigurable wireless links is an attractive opportunity for many industries. However, achieving this requires that the wireless connection operates with a delay, reliability and capacity similar to that of the cable, and its management is simplified. Low latency and very low error probability are new requirements that need to be connected to 5G.
  • Logistics and freight tracking are important use cases for mobile communications that enable tracking of inventory and packages from anywhere using location-based information systems. Logistics and freight tracking use cases typically require low data rates, but require a wide range and reliable location information.
  • the present disclosure is to provide a method and an apparatus for transmitting a sounding reference signal (SRS) by a terminal.
  • SRS sounding reference signal
  • a terminal In a method for a terminal to transmit an uplink signal in a wireless communication system according to an embodiment of the present disclosure, information on a downlink (DL) RS resource related to transmission of a sounding reference signal (SRS) And receive downlink control information (DCI) including information for requesting the SRS, and determine whether path loss is measured according to information on the DL RS resource.
  • DL downlink
  • DCI downlink control information
  • DRX Discontinuous Reception
  • the PDCCH Physical Downlink Control Channel
  • the DL RS resource is related to a neighbor cell
  • the DL RS resource is Based on the success of the measurement of the path loss according to the information on the path loss, the measured value of the path loss is used to determine the transmission power, and based on the failure to measure the path loss according to the information on the DL RS resource
  • information related to power setting obtained from a serving cell may be used to determine the transmission power.
  • the SRS may not be transmitted.
  • the transmission power may be determined by applying a power offset to the SRS transmission power for the serving cell.
  • the SRS may be related to the positioning of the terminal.
  • the method may further include receiving spatial relation information related to the DL RS resource, and the spatial relation information may include information on the neighboring cell.
  • the information on the neighboring cell included in the spatial relationship information can be used to determine the transmission beam of the SRS. have.
  • a terminal for transmitting an uplink signal in a wireless communication system comprising: at least one transceiver; At least one processor; And at least one memory that is operatively connected to the at least one processor, and stores instructions for causing the at least one processor to perform a specific operation when executed, wherein the specific operation includes: Downlink Control Information (DCI) including information on a downlink (DL) RS resource related to transmission of a Sounding Reference Signal (SRS) and requesting the SRS And, based on whether a path loss is measured according to information on the DL RS resource, a transmission power for transmitting the SRS is determined, and a response to the information requesting the SRS As a result, the SRS is transmitted according to the transmission power, and the PDCCH (Physical Downlink Control Channel) including the DCI is On It is monitored in -duration, and the DL RS resource is related to a neighbor cell, and based on the successful measurement of the path loss according to the information on the DL RS resource, the
  • DCI Down
  • the SRS may not be transmitted.
  • the transmission power may be determined by applying a power offset to the SRS transmission power for the serving cell.
  • the SRS may be related to the positioning of the terminal.
  • the specific operation may further include receiving spatial relation information related to the DL RS resource, and the spatial relation information may include information on the neighboring cell.
  • the information on the neighboring cell included in the spatial relationship information can be used to determine the transmission beam of the SRS. have.
  • An apparatus for transmitting an uplink signal in a wireless communication system comprising: at least one transceiver; At least one processor; And at least one memory that is operatively connected to the at least one processor, and stores instructions for causing the at least one processor to perform a specific operation when executed, wherein the specific operation includes: Downlink Control Information (DCI) including information on a downlink (DL) RS resource related to transmission of a Sounding Reference Signal (SRS) and requesting the SRS And, based on whether a path loss is measured according to information on the DL RS resource, a transmission power for transmitting the SRS is determined, and a response to the information requesting the SRS As a result, the SRS is transmitted according to the transmission power, and the PDCCH (Physical Downlink Control Channel) including the DCI is On It is monitored in -duration, and the DL RS resource is related to a neighbor cell, and based on the successful measurement of the path loss according to the information on the DL RS resource, the
  • DCI Down
  • a network node In a method for a network node to receive an uplink signal in a wireless communication system according to the present disclosure, information on a downlink (DL) RS resource related to transmission of a sounding reference signal (SRS) is transmitted to a terminal. And transmits downlink control information (DCI) including information for requesting the SRS to the terminal, and in response to the information requesting the SRS, the SRS is received from the terminal, and , In on-duration based on DRX (Discontinuous Reception), the PDCCH (Physical Downlink Control Channel) including the DCI is monitored, the DL RS resource is related to a neighbor cell, and the DL RS resource is a path loss The transmission power of the SRS is determined according to the measured value of the path loss, and the transmission power of the SRS is determined based on the success of the measurement of the path loss according to the information on the DL RS resource.
  • the transmission power of the SRS may be determined according to information related to power setting of a serving
  • a network node for receiving an uplink signal in a wireless communication system comprising: at least one transceiver; At least one processor; And at least one memory that is operatively connected to the at least one processor, and stores instructions for causing the at least one processor to perform a specific operation when executed, wherein the specific operation includes: Downlink Control Information (Downlink Control Information) which transmits information on a downlink (DL) RS resource related to transmission of a Sounding Reference Signal (SRS) to a terminal, and includes information requesting the SRS; DCI) is transmitted to the terminal, and in response to the information requesting the SRS, the SRS is received from the terminal, and PDCCH (Physical Downlink Control) including the DCI in On-duration based on DRX (Discontinuous Reception) Channel) is monitored, the DL RS resource is related to a neighbor cell, the DL RS resource is used for path loss measurement, and the path loss measurement according to the information on the DL RS resource is successful.
  • Downlink Control Information Down
  • the transmission power of the SRS is determined according to the measurement value of the path loss, and based on the failure to measure the path loss according to the information on the DL RS resource, a serving cell
  • the transmission power of the SRS may be determined according to information related to the power setting for ).
  • a computer-readable storage medium comprising instructions for causing the at least one processor to perform operations for a user device when executed by at least one processor.
  • One computer program is stored, and the operations include receiving information on a downlink (DL) RS resource related to transmission of a sounding reference signal (SRS), and information requesting the SRS. Transmission power for transmitting the SRS based on whether a path loss is measured according to information on the DL RS resource and receives downlink control information (DCI) included.
  • DL downlink
  • SRS sounding reference signal
  • DCI downlink control information
  • the PDCCH Physical Downlink Control Channel
  • the DL RS resource is related to a neighbor cell
  • the path loss according to the information on the DL RS resource Based on the successful measurement of the path loss, the measurement value of the path loss is used to determine the transmission power, and based on the failure to measure the path loss according to the information on the DL RS resource, a serving cell Information related to power setting obtained from) may be used to determine the transmission power.
  • a terminal can smoothly transmit a sounding reference signal in a wireless communication system.
  • FIG. 1 is a diagram showing the structure of a control plane and a user plane of a radio interface protocol between a terminal and an E-UTRAN based on a 3GPP radio access network standard.
  • FIG. 2 is a diagram illustrating physical channels used in a 3GPP system and a general signal transmission method using them.
  • 3 to 5 are diagrams for explaining the structure of a radio frame and slot used in an NR system.
  • FIG. 6 is a diagram illustrating an embodiment of a procedure for controlling uplink transmission power.
  • PRS Positioning Reference Signal
  • FIGS. 8 to 9 are diagrams for explaining the architecture of a system for measuring the location of the UE and a procedure for measuring the location of the UE.
  • LTP LTE Positioning Protocol
  • FIG. 11 is a diagram showing an example of a protocol layer for supporting NRPPa (NR Positioning Protocol A) PDU (Protocol Data Unit) transmission.
  • NRPPa NR Positioning Protocol A
  • PDU Protocol Data Unit
  • FIG. 12 is a diagram for explaining an embodiment of an OTDOA (Observed Time Difference Of Arrival) positioning method.
  • OTDOA Observed Time Difference Of Arrival
  • FIG. 13 is a diagram for describing an embodiment of a multi-RTT (round trip time) positioning method.
  • DRX Discontinuous Reception
  • 15 to 16 are diagrams for explaining an example of implementing operations of a terminal and a network node according to an embodiment of the present invention.
  • FIG 17 shows an example of a communication system to which embodiments of the present disclosure are applied.
  • FIG. 22 shows an example of a location server to which embodiments of the present disclosure are applied.
  • the name of the base station may be used as a generic term including a remote radio head (RRH), an eNB, a transmission point (TP), a reception point (RP), a relay, and the like.
  • RRH remote radio head
  • TP transmission point
  • RP reception point
  • relay a relay
  • 3GPP-based communication standards include downlink physical channels corresponding to resource elements carrying information originating from higher layers, and downlink corresponding to resource elements used by the physical layer but not carrying information originating from higher layers.
  • Physical signals are defined.
  • PBCH physical broadcast channel
  • PMCH physical multicast channel
  • PHICH physical control format indicator channel
  • PHICH physical hybrid ARQ indicator channel
  • a reference signal also referred to as a pilot, refers to a signal of a predefined special waveform that the gNB and the UE know each other, for example, cell specific RS (RS), UE- Specific RS (UE-specific RS, UE-RS), positioning RS (positioning RS, PRS), and channel state information RS (channel state information RS, CSI-RS) are defined as downlink reference signals.
  • RS cell specific RS
  • UE-specific RS UE-specific RS
  • UE-RS positioning RS
  • channel state information RS channel state information RS
  • CSI-RS channel state information RS
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • PRACH physical random access channel
  • DMRS demodulation reference signal
  • SRS sounding reference signal
  • PDCCH Physical Downlink Control CHannel
  • PCFICH Physical Control Format Indicator CHannel
  • PHICH Physical Hybrid automatic retransmit request Indicator CHannel
  • PDSCH Physical Downlink Shared CHannel
  • DCI Downlink Control Information
  • CFI Control Format Indicator
  • Downlink ACK / NACK ACKnowlegement / Negative ACK
  • PUCCH Physical Uplink Control CHannel
  • PUSCH Physical Uplink Shared CHannel
  • PRACH Physical Random Access CHannel
  • UCI uplink control information
  • PDCCH/PCFICH/PHICH/PDSCH/PUCCH/PUSCH/PRACH allocated to or belonging to a time-frequency resource or resource element (RE), respectively, PDCCH/PCFICH/PHICH/PDSCH/PUCCH/PUSCH/PRACH RE or PDCCH It is referred to as /PCFICH/PHICH/PDSCH/PUCCH/PUSCH/PRACH resource
  • the expression that the user equipment transmits PUCCH/PUSCH/PRACH is, respectively, uplink control information/uplink data on or through PUSCH/PUCCH/PRACH.
  • /It is used in the same meaning as that of transmitting a random access signal.
  • the expression that gNB transmits PDCCH/PCFICH/PHICH/PDSCH is on the PDCCH/PCFICH/PHICH/PDSCH, respectively. It is used in the same meaning as transmitting downlink data/control information through or through.
  • CRS/DMRS/CSI-RS/SRS/UE-RS are allocated or configured OFDM symbols/subcarriers/REs are CRS/DMRS/CSI-RS/SRS/UE-RS symbols/carriers. It is called /subcarrier/RE.
  • an OFDM symbol to which a tracking RS (TRS) is allocated or configured is referred to as a TRS symbol
  • a subcarrier to which a TRS is allocated or configured is referred to as a TRS subcarrier
  • a TRS is allocated.
  • the configured RE is referred to as TRS RE.
  • a subframe configured for TRS transmission is referred to as a TRS subframe.
  • a subframe in which a broadcast signal is transmitted is referred to as a broadcast subframe or a PBCH subframe
  • a subframe in which a synchronization signal (eg, PSS and/or SSS) is transmitted is a synchronization signal subframe or a PSS/SSS subframe. It is called.
  • An OFDM symbol/subcarrier/RE to which PSS/SSS is assigned or configured is referred to as PSS/SSS symbol/subcarrier/RE, respectively.
  • a CRS port, a UE-RS port, a CSI-RS port, and a TRS port respectively refer to an antenna port configured to transmit a CRS, an antenna port configured to transmit a UE-RS, Refers to an antenna port configured to transmit CSI-RS and an antenna port configured to transmit TRS.
  • the antenna ports configured to transmit CRSs can be distinguished from each other by the positions of the REs occupied by the CRS according to the CRS ports, and the antenna ports configured to transmit UE-RSs are UE -According to the RS ports, the positions of the REs occupied by the UE-RS can be divided, and the antenna ports configured to transmit CSI-RSs are occupied by the CSI-RS according to the CSI-RS ports.
  • CRS/UE-RS/CSI-RS/TRS port is also used as a term to mean a pattern of REs occupied by CRS/UE-RS/CSI-RS/TRS within a certain resource area.
  • the control plane refers to a path through which control messages used by a user equipment (UE) and a network to manage a call are transmitted.
  • the user plane refers to a path through which data generated in the application layer, for example, voice data or Internet packet data, is transmitted.
  • the first layer provides an information transfer service to an upper layer using a physical channel.
  • the physical layer is connected to the upper medium access control layer through a transmission channel (transport channel). Data is transferred between the medium access control layer and the physical layer through the transmission channel. Data moves between the physical layers of the transmitting side and the receiving side through a physical channel.
  • the physical channel uses time and frequency as radio resources. Specifically, a physical channel is modulated in an Orthogonal Frequency Division Multiple Access (OFDMA) scheme in downlink and a single carrier frequency division multiple access (SC-FDMA) scheme in uplink.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA single carrier frequency division multiple access
  • the medium access control (MAC) layer of the second layer provides a service to an upper layer, the Radio Link Control (RLC) layer, through a logical channel.
  • the RLC layer of the second layer supports reliable data transmission.
  • the function of the RLC layer may be implemented as a functional block inside the MAC.
  • the PDCP (Packet Data Convergence Protocol) layer of the second layer performs a header compression function that reduces unnecessary control information in order to efficiently transmit IP packets such as IPv4 or IPv6 over a narrow bandwidth wireless interface.
  • the radio resource control (RRC) layer located at the bottom of the third layer is defined only in the control plane.
  • the RRC layer is in charge of controlling logical channels, transmission channels, and physical channels in relation to configuration, re-configuration, and release of radio bearers.
  • the radio bearer refers to a service provided by the second layer for data transmission between the terminal and the network.
  • the UE and the RRC layer of the network exchange RRC messages with each other. If there is an RRC connection (RRC Connected) between the terminal and the RRC layer of the network, the terminal is in an RRC connected state (Connected Mode), otherwise it is in the RRC idle state (Idle Mode).
  • the NAS (Non-Access Stratum) layer above the RRC layer performs functions such as session management and mobility management.
  • the downlink transmission channel for transmitting data from the network to the terminal includes a broadcast channel (BCH) that transmits system information, a paging channel (PCH) that transmits paging messages, and a downlink shared channel (SCH) that transmits user traffic or control messages. have.
  • BCH broadcast channel
  • PCH paging channel
  • SCH downlink shared channel
  • a downlink multicast or broadcast service traffic or control message it may be transmitted through a downlink SCH or a separate downlink multicast channel (MCH).
  • RACH random access channel
  • SCH uplink shared channel
  • BCCH Broadcast Control Channel
  • PCCH Paging Control Channel
  • CCCH Common Control Channel
  • MCCH Multicast Control Channel
  • MTCH Multicast. Traffic Channel
  • FIG. 2 is a diagram illustrating physical channels used in a 3GPP system and a general signal transmission method using them.
  • the terminal When the terminal is powered on or newly enters a cell, the terminal performs an initial cell search operation such as synchronizing with the base station (S201). To this end, the UE receives a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) from the base station to synchronize with the base station and obtain information such as cell ID. Thereafter, the terminal may receive a physical broadcast channel (PBCH) from the base station to obtain intra-cell broadcast information. Meanwhile, the UE may receive a downlink reference signal (DL RS) in the initial cell search step to check a downlink channel state.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • PBCH physical broadcast channel
  • DL RS downlink reference signal
  • the UE After completing the initial cell search, the UE acquires more detailed system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) according to the information carried on the PDCCH. It can be done (S202).
  • a physical downlink control channel (PDCCH)
  • a physical downlink shared channel (PDSCH)
  • the terminal may perform a random access procedure (RACH) with respect to the base station (S203 to S206).
  • RACH random access procedure
  • the UE transmits a specific sequence as a preamble through a physical random access channel (PRACH) (S203 and S205), and a response message to the preamble through a PDCCH and a corresponding PDSCH (RAR (Random Access Response) message)
  • PRACH physical random access channel
  • RAR Random Access Response
  • a contention resolution procedure may be additionally performed (S206).
  • the UE receives PDCCH/PDSCH (S207) and Physical Uplink Shared Channel (PUSCH)/Physical Uplink Control Channel as a general uplink/downlink signal transmission procedure.
  • Control Channel; PUCCH) transmission (S208) may be performed.
  • the terminal may receive downlink control information (DCI) through the PDCCH.
  • DCI downlink control information
  • the DCI includes control information such as resource allocation information for the terminal, and different formats may be applied according to the purpose of use.
  • control information transmitted by the terminal to the base station through the uplink or received from the base station by the terminal is a downlink/uplink ACK/NACK signal, a channel quality indicator (CQI), a precoding matrix index (PMI), a rank indicator (RI). ), etc.
  • the terminal may transmit control information such as CQI/PMI/RI described above through PUSCH and/or PUCCH.
  • the NR system is considering a method of using a high ultra-high frequency band, that is, a millimeter frequency band of 6 GHz or higher to transmit data while maintaining a high transmission rate to a large number of users using a wide frequency band.
  • a high ultra-high frequency band that is, a millimeter frequency band of 6 GHz or higher
  • this is used under the name NR, and in the present invention, it will be referred to as an NR system.
  • NR supports multiple numerology (or subcarrier spacing (SCS)) to support various 5G services. For example, when the SCS is 15 kHz, it supports a wide area in traditional cellular bands, and when the SCS is 30 kHz/60 kHz, it is dense-urban, lower latency. And a wider carrier bandwidth (wider carrier bandwidth) is supported, and when the SCS is 60 kHz or higher, a bandwidth greater than 24.25 kHz is supported to overcome phase noise.
  • SCS subcarrier spacing
  • the NR frequency band is defined as a frequency range of two types (FR1, FR2).
  • FR1 is a sub 6GHz range
  • FR2 may mean a millimeter wave (mmW) in the above 6GHz range.
  • mmW millimeter wave
  • Table 1 below shows the definition of the NR frequency band.
  • 3 illustrates a structure of a radio frame used in NR.
  • uplink and downlink transmission is composed of frames.
  • the radio frame has a length of 10ms and is defined as two 5ms half-frames (HF).
  • the half-frame is defined as five 1ms subframes (Subframe, SF).
  • the subframe is divided into one or more slots, and the number of slots in the subframe depends on Subcarrier Spacing (SCS).
  • SCS Subcarrier Spacing
  • Each slot includes 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP). When a normal CP is used, each slot includes 14 symbols. When the extended CP is used, each slot includes 12 symbols.
  • the symbol may include an OFDM symbol (or CP-OFDM symbol), an SC-FDMA symbol (or DFT-s-OFDM symbol).
  • Table 2 exemplifies that when a normal CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to the SCS.
  • Table 3 exemplifies that when the extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to the SCS.
  • OFDM(A) numerology eg, SCS, CP length, etc.
  • OFDM(A) numerology eg, SCS, CP length, etc.
  • the (absolute time) section of the time resource eg, SF, slot or TTI
  • TU Time Unit
  • the slot includes a plurality of symbols in the time domain. For example, in the case of a normal CP, one slot includes 14 symbols, but in the case of an extended CP, one slot includes 12 symbols.
  • the carrier includes a plurality of subcarriers in the frequency domain.
  • RB Resource Block
  • the BWP Bandwidth Part
  • P Physical Broadband
  • the carrier may contain up to N (eg, 4) BWPs. Data communication is performed through the activated BWP, and only one BWP can be activated to one terminal.
  • Each element in the resource grid is referred to as a resource element (RE), and one complex symbol may be mapped.
  • RE resource element
  • a frame is characterized by a self-contained structure in which all of a DL control channel, DL or UL data, and a UL control channel can be included in one slot.
  • the first N symbols in a slot may be used to transmit a DL control channel (hereinafter, a DL control region), and the last M symbols in a slot may be used to transmit a UL control channel (hereinafter, a UL control region).
  • N and M are each an integer of 0 or more.
  • a resource region (hereinafter, a data region) between the DL control region and the UL control region may be used for DL data transmission or UL data transmission.
  • the following configuration may be considered. Each section was listed in chronological order.
  • the PDCCH may be transmitted in the DL control region, and the PDSCH may be transmitted in the DL data region.
  • PUCCH may be transmitted in the UL control region, and PUSCH may be transmitted in the UL data region.
  • DCI downlink control information
  • DL data scheduling information for example, DL data scheduling information, UL data scheduling information, and the like
  • uplink control information for example, positive acknowledgment/negative acknowledgment (ACK/NACK) information for DL data, channel state information (CSI) information, scheduling request (SR), and the like may be transmitted.
  • the GP provides a time gap in the process of switching from a transmission mode to a reception mode or a process of switching from a reception mode to a transmission mode between the base station and the terminal. Some symbols at a time point at which the DL to UL is switched in the subframe may be set as GP.
  • BWP Bandwidth Part
  • up to 400 MHz can be supported per one carrier.
  • the UE operating on such a wideband carrier always operates with a radio frequency (RF) module for the entire carrier on, the UE battery consumption may increase.
  • RF radio frequency
  • different numerology eg, subcarrier spacing
  • each UE may have different capabilities for the maximum bandwidth.
  • the base station may instruct the UE to operate only in a portion of the bandwidth, not the entire bandwidth of the wideband carrier, and the portion of the bandwidth is referred to as a bandwidth part (BWP).
  • BWP bandwidth part
  • the BWP is a subset of contiguous common resource blocks defined for the neurology ⁇ i in the bandwidth part i on the carrier, and one neurology (e.g., subcarrier spacing, CP length, slot/mini-slot duration) Period) can be set.
  • one neurology e.g., subcarrier spacing, CP length, slot/mini-slot duration
  • the base station may set one or more BWPs in one carrier set to the UE.
  • some UEs may be moved to another BWP for load balancing.
  • some spectrum of the entire bandwidth may be excluded and both BWPs of the cell may be set in the same slot.
  • the base station may set at least one DL/UL BWP to the UE associated with the wideband carrier, and at least one DL/UL BWP among the DL/UL BWP(s) set at a specific time (physical L1 signaling as a layer control signal, MAC control element (CE) as a MAC layer control signal, or RRC signaling) can be activated and switch to another configured DL/UL BWP (L1 signaling, MAC CE, or by RRC signaling) or by setting a timer value so that the UE switches to a predetermined DL/UL BWP when the timer expires.
  • a specific time physical L1 signaling as a layer control signal, MAC control element (CE) as a MAC layer control signal, or RRC signaling
  • DCI format 1_1 or DCI format 0_1 may be used.
  • the activated DL/UL BWP is specifically referred to as the active DL/UL BWP.
  • the UE may not be able to receive the configuration for the DL/UL BWP.
  • the DL/UL BWP assumed by the UE is called an initial active DL/UL BWP.
  • the DL BWP is a BWP for transmitting and receiving a downlink signal such as a PDCCH and/or a PDSCH
  • the UL BWP is a BWP for transmitting and receiving an uplink signal such as a PUCCH and/or a PUSCH.
  • a downlink channel and/or a downlink signal can be transmitted and received in an active DL Downlink Bandwidth Part (BWP).
  • BWP Downlink Bandwidth Part
  • an uplink channel and/or an uplink signal may be transmitted and received within an active UL BWP (Uplink Bandwidth Part).
  • the base station schedules uplink transmission such as frequency/time resources, transport layer, uplink precoder, MCS, and the like.
  • the base station may determine a beam for PUSCH transmission by the terminal through the above-described operations.
  • the UE receives a DCI for uplink scheduling (ie, including scheduling information of PUSCH) from the base station on the PDCCH.
  • a DCI for uplink scheduling ie, including scheduling information of PUSCH
  • DCI format 0_0 or 0_1 may be used for uplink scheduling, and in particular, DCI format 0_1 includes the following information: DCI format identifier (Identifier for DCI formats), UL/SUL (Supplementary uplink) indicator (UL/ SUL indicator), bandwidth part indicator, frequency domain resource assignment, time domain resource assignment, frequency hopping flag, modulation and coding scheme (MCS) : Modulation and coding scheme), SRS resource indicator (SRI), precoding information and number of layers, antenna port(s) (Antenna port(s)), SRS request (SRS request), DMRS sequence initialization, UL-SCH (Uplink Shared Channel) indicator (UL-SCH indicator)
  • SRS resources set in the SRS resource set associated with the upper layer parameter'usage' may be indicated by the SRS resource indicator field.
  • SRS resource indicator field may indicate SRS resource indicator field.
  • patialRelationInfo' can be set for each SRS resource, and its value can be one of ⁇ CRI, SSB, SRI ⁇ .
  • the terminal transmits uplink data to the base station on the PUSCH.
  • the UE When the UE detects a PDCCH including DCI format 0_0 or 0_1, it transmits a corresponding PUSCH according to an indication by the corresponding DCI.
  • codebook-based transmission For PUSCH transmission, two transmission schemes are supported: codebook-based transmission and non-codebook-based transmission:
  • the terminal When the upper layer parameter'txConfig' is set to'codebook', the terminal is set to codebook-based transmission. On the other hand, when the upper layer parameter'txConfig' is set to'nonCodebook', the terminal is set to non-codebook based transmission. If the upper layer parameter'txConfig' is not set, the UE does not expect to be scheduled according to DCI format 0_1. When PUSCH is scheduled according to DCI format 0_0, PUSCH transmission is based on a single antenna port.
  • the PUSCH may be scheduled in DCI format 0_0, DCI format 0_1, or semi-statically.
  • the UE transmits PUSCH based on SRI, Transmit Precoding Matrix Indicator (TPMI) and transmission rank from DCI, as given by the SRS resource indicator field and the Precoding information and number of layers field.
  • TPMI Transmit Precoding Matrix Indicator
  • the TPMI is used to indicate the precoder to be applied across the antenna port, and corresponds to the SRS resource selected by the SRI when multiple SRS resources are configured.
  • the TPMI is used to indicate a precoder to be applied across the antenna port, and corresponds to the single SRS resource.
  • a transmission precoder is selected from an uplink codebook having the same number of antenna ports as the upper layer parameter'nrofSRS-Ports'.
  • the terminal is configured with at least one SRS resource.
  • the SRI indicated in slot n is associated with the most recent transmission of the SRS resource identified by the SRI, where the SRS resource precedes the PDCCH carrying the SRI (ie, slot n).
  • the PUSCH may be scheduled in DCI format 0_0, DCI format 0_1, or semi-statically.
  • the UE can determine the PUSCH precoder and transmission rank based on the wideband SRI, where the SRI is given by the SRS resource indicator in the DCI or by the upper layer parameter'srs-ResourceIndicator'. Is given.
  • the UE uses one or multiple SRS resources for SRS transmission, where the number of SRS resources may be set for simultaneous transmission within the same RB based on UE capability. Only one SRS port is configured for each SRS resource. Only one SRS resource may be set to the upper layer parameter'usage' set to'nonCodebook'.
  • the maximum number of SRS resources that can be configured for non-codebook-based uplink transmission is 4.
  • the SRI indicated in slot n is associated with the most recent transmission of the SRS resource identified by the SRI, where the SRS transmission precedes the PDCCH carrying the SRI (ie, slot n).
  • the transmission power control method is a requirement (e.g., Signal-to-Noise Ratio (SNR), Bit Error Ratio (BER)), Block Error Ratio (BLER) of a base station (e.g., gNB, eNB, etc.) Etc.).
  • SNR Signal-to-Noise Ratio
  • BER Bit Error Ratio
  • BLER Block Error Ratio
  • Power control as described above may be performed by an open-loop power control method and a closed-loop power control method.
  • the open-loop power control method is a method of controlling transmission power without feedback from a transmitting device (eg, a base station) to a receiving device (eg, a terminal, etc.) and/or feedback from the receiving device to the transmitting device.
  • a transmitting device eg, a base station
  • a receiving device eg, a terminal, etc.
  • the terminal may receive a specific channel/signal from the base station and estimate the strength of the received power by using this. Thereafter, the terminal may control the transmission power by using the estimated strength of the received power.
  • the closed loop power control method refers to a method of controlling transmission power based on feedback from a transmitting device to a receiving device and/or feedback from a receiving device to a transmitting device.
  • the base station receives a specific channel/signal from the terminal, and the optimal power level of the terminal based on the power level, SNR, BER, BLER, etc. measured by the received specific channel/signal. To decide.
  • the base station transmits information (ie, feedback) on the determined optimal power level to the terminal through a control channel or the like, and the terminal can control the transmission power using the feedback provided by the base station.
  • uplink data channel e.g., PUSCH (Physical Uplink Shared Channel)
  • uplink control channel e.g., PUCCH (Physical Uplink Control Channel)
  • SRS Sounding Reference Signal
  • PRACH Physical Random Access Channel
  • transmission occasion for PUSCH, PUCCH, SRS and/or PRACH (ie, transmission Time unit) (i) is the slot index (n_s) in the frame of the system frame number (SFN), the first symbol in the slot (S), the number of consecutive symbols (L), etc.
  • n_s slot index
  • SFN system frame number
  • S first symbol in the slot
  • L number of consecutive symbols
  • the power control method is described below based on a case in which the UE performs PUSCH transmission, but the power control method is not limited to PUCSH transmission. It goes without saying that it can be extended and applied to other uplink data channels supported by the wireless communication system.
  • the terminal In the case of PUSCH transmission in the active uplink bandwidth part (UL bandwidth part, UL BWP) of the carrier (f) of the serving cell (c), the terminal is determined by Equation 1 below. A linear power value of the determined transmission power may be calculated. Thereafter, the corresponding terminal may control the transmission power by considering the calculated linear power value in consideration of the number of antenna ports and/or the number of SRS ports.
  • the UE uses a parameter set configuration based on index j and a PUSCH power control adjustment state based on index l, and the carrier (f) of the serving cell (c) is activated.
  • the UE transmits PUSCH transmission power at the PUSCH transmission opportunity (i) based on Equation 1 below. (dBm) can be determined.
  • index j is an open-loop power control parameter (e.g. P_o, alpha, ), etc.), and a maximum of 32 parameter sets can be set per cell.
  • Index q_d is the path loss (PL) measurement (e.g. Represents the index of the DL RS resource for ), and up to 4 measurements per cell can be set.
  • Index l represents an index for a closed loop power control process, and up to two processes may be set per cell.
  • P_o e.g. Is a parameter broadcast as part of system information, and may indicate target reception power at the receiving side.
  • the corresponding P_o value may be set in consideration of the throughput of the terminal, the capacity of the cell, noise and/or interference.
  • alpha e.g.
  • Alpha may be set to a value from 0 to 1, and full pathloss compensation or fractional pathloss compensation may be performed according to the set value.
  • the alpha value may be set in consideration of interference and/or data rate between terminals.
  • the set UE transmission power may be interpreted as'configured maximum UE output power' defined in 3GPP TS 38.101-1 and/or TS38.101-2.
  • Is the subcarrier spacing ( ) May indicate a bandwidth of PUSCH resource allocation expressed as the number of resource blocks (RBs) for a PUSCH transmission opportunity.
  • related to the PUSCH power control adjustment state May be set or indicated based on the TPC command field of DCI (eg, DCI format 0_0, DCI format 0_1, DCI format 2_2, DCI format2_3, etc.).
  • a specific Radio Resource Control (RRC) parameter e.g., SRI-PUSCHPowerControl-Mapping, etc.
  • RRC Radio Resource Control
  • SRI-PUSCHPowerControl-Mapping is the linkage between the SRS Resource Indicator (SRI) field of downlink control information (DCI) and the indexes j, q_d, and l ) Can be represented.
  • the aforementioned indexes j, l, q_d, etc. may be associated with a beam, a panel, and/or a spatial domain transmission filter, based on specific information.
  • PUSCH transmission power control in units of beams, panels, and/or spatial domain transmission filters may be performed.
  • parameters and/or information for PUSCH power control may be individually (ie, independently) set for each BWP.
  • the corresponding parameters and/or information may be set or indicated through higher layer signaling (eg, RRC signaling, Medium Access Control-Control Element (MAC-CE), etc.) and/or DCI.
  • RRC signaling e.g, RRC signaling, Medium Access Control-Control Element (MAC-CE), etc.
  • MAC-CE Medium Access Control-Control Element
  • parameters and/or information for PUSCH power control may be delivered through RRC signaling PUSCH-ConfigCommon, PUSCH-PowerControl, and the like, and PUSCH-ConfigCommon and PUSCH-PowerControl mentioned in 3GPP TS Rel.16 38.331 are as follows. .
  • the UE may determine or calculate the PUSCH transmission power through the above-described method, and may transmit the PUSCH using the determined or calculated PUSCH transmission power.
  • the power control method is described below based on the case where the UE performs PUCCH transmission, but the power control method is not limited to PUCCH transmission. It goes without saying that it can be extended and applied to other uplink data channels supported by the wireless communication system.
  • the UE uses the PUCCH power control adjustment state based on index l, the activated UL of the carrier f of the primary cell (or secondary cell) (c)
  • the UE transmits PUCCH transmission power at a PUCCH transmission opportunity (i) based on Equation 2 below. (dBm) can be determined.
  • q_u represents an index for an open-loop power control parameter (eg, P_o, etc.), and up to eight parameter values may be set per cell.
  • Index q_d is the path loss (PL) measure (e.g. Represents the index of the DL RS resource for ), and up to 4 measurements per cell can be set.
  • Index l represents an index for a closed loop power control process, and up to two processes may be set per cell.
  • P_o (for example: ) Is a parameter broadcast as part of system information, and may indicate a target reception power at the receiving side.
  • the Po value may be set in consideration of the throughput of the terminal, the capacity of the cell, noise, and/or interference.
  • the set UE transmission power may be interpreted as'configured maximum UE output power' defined in 3GPP TS 38.101-1 and/or TS38.101-2.
  • Is the subcarrier spacing ( ) May indicate the bandwidth of PUCCH resource allocation expressed as the number of resource blocks (RBs) for PUCCH transmission opportunities.
  • a delta function (e.g.
  • PUCCH format eg, PUCCH formats 0, 1, 2, 3, 4, etc.
  • related to the PUCCH power control adjustment state May be set or indicated based on a TPC command field of DCI (eg, DCI format 1_0, DCI format 1_1, DCI format 2_2, etc.) received or detected by the terminal.
  • DCI DCI format 1_0, DCI format 1_1, DCI format 2_2, etc.
  • a specific RRC parameter eg, PUCCH-SpatialRelationInfo, etc.
  • a specific MAC-CE command eg, PUCCH spatial relation Activation/Deactivation, etc.
  • PUCCH resource and the aforementioned indexes q_u, q_d It can be used to activate or deactivate the connection relationship between, and l.
  • the PUCCH spatial relation Activation/Deactivation command in MAC-CE may activate or deactivate a connection relationship between a PUCCH resource and the aforementioned indexes q_u, q_d, and l based on the RRC parameter PUCCH-SpatialRelationInfo.
  • the above-described indexes q_u, q_d, l, etc. may be associated with a beam, a panel, and/or a spatial domain transmission filter based on specific information.
  • PUCCH transmission power control in units of a beam, a panel, and/or a spatial domain transmission filter may be performed.
  • parameters and/or information for PUCCH power control may be set individually (ie, independently) for each BWP.
  • the corresponding parameters and/or information may be set or indicated through higher layer signaling (eg, RRC signaling, MAC-CE, etc.) and/or DCI.
  • parameters and/or information for PUCCH power control may be delivered through RRC signaling PUCCH-ConfigCommon, PUCCH-PowerControl, etc., and PUCCH-ConfigCommon and PUCCH-PowerControl mentioned in 3GPP TS Rel.16 38.331 are as follows. .
  • the terminal may determine or calculate the PUSCH transmission power through the above-described method, and transmit the PUCCH using the determined or calculated PUCCH transmission power.
  • the terminal may calculate a linear power value of the transmission power determined by Equation 7 below. Thereafter, the UE can control the transmission power by equally dividing the calculated linear power value for antenna port(s) set for the SRS.
  • the UE performs SRS transmission in the activated UL BWP (b) of the carrier (f) of the serving cell (c) using the SRS power control adjustment state based on the index l
  • the terminal SRS transmission power at the SRS transmission opportunity (i) based on Equation 3 below (dBm) can be determined.
  • q_s is an open-loop power control parameter (e.g., P_o, alpha, ), path loss (PL) measurement (e.g. ) Indicates an index for DL RS resources, etc.), and can be set for each SRS resource set.
  • the index l represents an index for the closed loop power control process, and the index may be set independently of the PUSCH or may be set in association with the PUSCH.
  • the maximum number of closed loop power control processes for SRS may be 1.
  • P_o Is a parameter broadcast as part of system information, and may indicate a target reception power at the receiving side.
  • the corresponding P_o value may be set in consideration of the throughput of the terminal, the capacity of the cell, noise and/or interference.
  • alpha e.g.
  • Alpha may be set to a value from 0 to 1, and full pathloss compensation or fractional pathloss compensation may be performed according to the set value.
  • the alpha value may be set in consideration of interference and/or data rate between terminals.
  • the set UE transmission power may be interpreted as'configured maximum UE output power' defined in 3GPP TS 38.101-1 and/or TS38.101-2.
  • Is the subcarrier spacing ( ) May indicate the bandwidth of SRS resource allocation expressed as the number of resource blocks (RBs) for SRS transmission opportunities.
  • related to the SRS power control adjustment state May be set or indicated based on a TPC command field and/or an RRC parameter (eg, srs-PowerControlAdjustmentStates, etc.) of a DCI (eg, DCI format 2_3, etc.) received or detected by the terminal.
  • an RRC parameter eg, srs-PowerControlAdjustmentStates, etc.
  • the resource for SRS transmission may be applied as a reference for the base station and/or the terminal to determine a beam, a panel, and/or a spatial domain transmission filter, and in consideration of this, SRS transmission power control , And/or a spatial domain transmission filter.
  • the parameters and/or information for the above-described SRS power control may be individually (ie, independently) set for each BWP.
  • the corresponding parameters and/or information may be set or indicated through higher layer signaling (eg, RRC signaling, MAC-CE, etc.) and/or DCI.
  • parameters and/or information for SRS power control may be delivered through RRC signaling SRS-Config, SRS-TPC-CommandConfig, and the like, and SRS-Config and SRS-TPC- mentioned in 3GPP TS Rel.16 38.331.
  • CommandConfig is as follows.
  • the terminal may determine or calculate the SRS transmission power through the method as described above, and may transmit the SRS using the determined or calculated SRS transmission power.
  • the terminal When the terminal performs PRACH transmission in the activated UL BWP (b) of the carrier (f) of the serving cell (c), the terminal is based on Equation 4 below, PRACH transmission power at the PRACH transmission opportunity (i) (dBm) can be determined.
  • Equation 4 May represent the set terminal transmission power.
  • the set UE transmission power may be interpreted as'configured maximum UE output power' defined in 3GPP TS 38.101-1 and/or TS38.101-2.
  • PRACH target reception power provided through higher layer signaling (eg, RRC signaling, MAC-CE, etc.) for the activated UL BWP.
  • path loss for the activated UL BWP and may be determined based on the DL RS associated with PRACH transmission in the activated DL BWP of the serving cell c.
  • the UE may determine a path loss related to PRACH transmission based on a Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) block related to PRACH transmission.
  • SS Synchronization Signal
  • PBCH Physical Broadcast Channel
  • parameters and/or information for PRACH power control may be individually (ie, independently) set for each BWP.
  • the corresponding parameters and/or information may be set or indicated through higher layer signaling (eg, RRC signaling, MAC-CE, etc.).
  • RRC signaling e.g., RRC signaling, MAC-CE, etc.
  • parameters and/or information for PRACH power control may be delivered through RRC signaling RACH-ConfigGeneric, and the like, and RACH-ConfigGeneric referred to in 3GPP TS Rel.16 38.331 is as follows.
  • the UE may determine or calculate the PRACH transmission power through the method as described above, and may transmit the PRACH using the determined or calculated PRACH transmission power.
  • the transmission power of the terminal is A method of controlling will be described below.
  • the UE for uplink transmissions (e.g., PUSCH, PUCCH, SRS, and/or PRACH transmissions in (1) to (4) described above) at each transmission occasion (i)
  • the linear value of the terminal transmit power for which the total UE transmit power is set (eg: ), the terminal may be configured to allocate power for the uplink transmissions according to a priority order.
  • the configured terminal transmission power is'configured maximum UE output power of the terminal' defined in 3GPP TS 38.101-1 and/or TS38.101-2 (eg: Can mean ).
  • the priority for transmission power control may be set or defined in the following order.
  • PCell Primary Cell
  • HARQ-ACK Hybrid Automatic Repeat and ReQuest-Acknowledgement
  • SR Service Request
  • aperiodic SRS has a higher priority than semi-persistent SRS and/or periodic SRS
  • PRACH in a serving cell other than a Pcell send
  • the terminal may control the total transmission power in each symbol of the transmission opportunity i to be less than or equal to a linear value of the set terminal transmission power.
  • the UE may be configured to scale and/or drop power for uplink transmission having a low priority. In this case, specific details on scaling and/or drop may be set or defined according to UE implementation.
  • the terminal may consider transmission in the Pcell as a higher priority than transmission in the Scell. And/or, in the case of transmissions having the same priority in a plurality of UL carriers (eg, two UL carriers), the UE may consider a carrier in which PUCCH transmission is configured as a high priority. In addition, when PUCCH transmission is not configured for any carrier, the UE may consider transmission on a non-supplementary UL carrier with high priority.
  • FIG. 6 is a diagram illustrating an embodiment of a procedure for controlling uplink transmission power.
  • a user equipment may receive a parameter and/or information related to a transmission power (Tx power) from a base station (605).
  • the terminal may receive corresponding parameters and/or information through higher layer signaling (eg, RRC signaling, MAC-CE, etc.).
  • RRC signaling e.g., RRC signaling, MAC-CE, etc.
  • the terminal may receive parameters and/or information related to the above-described transmission power control.
  • the terminal may receive a TPC command related to transmission power from the base station (610).
  • the UE may receive the corresponding TPC command through lower layer signaling (eg, DCI).
  • DCI lower layer signaling
  • the terminal provides information on the TPC command to be used to determine the power control adjustment state, etc., as described above, through a TPC command field of a predefined DCI format. Can receive.
  • this step may be omitted.
  • the terminal may determine (or calculate) transmission power for uplink transmission based on parameters, information, and/or TPC commands received from the base station (615).
  • the UE determines PUSCH transmission power, PUCCH transmission power, SRS transmission power, and/or PRACH transmission power based on the above-described scheme (eg, Equation 1, Equation 2, Equation 3, Equation 4, etc.) You can decide. And/or, when two or more uplink channels and/or signals need to be transmitted by overlapping, such as in a situation such as carrier aggregation, the terminal performs uplink transmission in consideration of the above-described priority order. It is also possible to determine the transmit power for.
  • the UE may transmit one or more uplink channels and/or signals (eg, PUSCH, PUCCH, SRS, PRACH, etc.) to the base station based on the determined (or calculated) transmission power.
  • uplink channels and/or signals eg, PUSCH, PUCCH, SRS, PRACH, etc.
  • Positioning may mean determining a geographic location and/or speed of a UE by measuring a radio signal.
  • the location information may be requested by a client (eg, an application) related to the UE and reported to the client.
  • the location information may be included in a core network or may be requested by a client connected to the core network.
  • the location information may be reported in a standard format such as cell-based or geographic coordinates, and in this case, an estimation error value for the location and speed of the UE and/or a positioning method used for positioning may be reported together. I can.
  • PRS Positioning Reference Signal
  • PRS is a reference signal used for location estimation of the UE.
  • the PRS may be transmitted only in a downlink subframe (hereinafter, referred to as'Positioning Subframe') configured for PRS transmission.
  • the MBSFN (Multimedia broadcast single frequency network) subframe and the non-MBSFN subframe are set as a positioning subframe
  • the Orthogonal Frequency Division Multiplexing (OFDM) symbols of the MBSFN subframe are the same as subframe #0 CP ( Cyclic Prefix).
  • OFDM symbols set for the PRS in the MBSFN subframe may have an extended CP.
  • n_s denotes a slot number within a radio frame
  • l denotes an OFDM symbol number within the slot.
  • c(i) is a Pseudo-Random sequence and may be initialized according to [Equation 6] below.
  • N_cp is 1 in the general CP (Cyclic Prefix) and 0 in the extended CP.
  • FIG. 7 shows an example of a pattern in which a PRS is mapped in a subframe. As shown in FIG. 3, the PRS may be transmitted through antenna port 6.
  • FIG. 7(a) shows an example in which a PRS is mapped in a general CP
  • FIG. 7(b) shows an example in which a PRS is mapped in an extended CP.
  • the PRS may be transmitted in consecutive subframes grouped for position estimation.
  • the grouped subframes for position estimation are referred to as Positioning Occasion.
  • This positioning opportunity may consist of 1, 2, 4 or 6 subframes.
  • such a positioning opportunity may occur periodically in a period of 160, 320, 640, or 1280 subframes.
  • a cell-specific subframe offset value for indicating the start subframe of PRS transmission may be defined, and the offset value and the period of the positioning opportunity for PRS transmission are as shown in [Table 4] below, and PRS configuration It can be derived by an index (Configuration Index).
  • the PRS included in each positioning opportunity is transmitted with a constant power.
  • a PRS may be transmitted with zero power at a specific positioning opportunity, which is referred to as PRS muting. For example, by muting the PRS transmitted from the serving cell, the UE can easily detect the PRS of the adjacent cell.
  • the PRS muting configuration for the cell may be defined by a periodic muting sequence consisting of 2, 4, 8 or 16 positioning opportunities. That is, the periodic muting sequence may be composed of 2, 4, 8, or 16 bits according to positioning opportunities corresponding to the PRS muting setting, and each bit may have a value of '0' or '1'. For example, PRS muting may be performed at a positioning opportunity in which the bit value is '0'.
  • the positioning subframe is designed as a low interference subframe, data is not transmitted in the positioning subframe. Therefore, although the PRS may be interfered by the PRS of another cell, it is not interfered by data transmission.
  • FIG. 8 shows an architecture in a 5G system capable of positioning a UE connected to an NG-RAN (Next Generation-Radio Access Network) or E-UTRAN.
  • NG-RAN Next Generation-Radio Access Network
  • E-UTRAN E-UTRAN
  • AMF Core Access and Mobility Management Function
  • the LMF may process the location service request and return a processing result including the estimated location of the UE to the AMF.
  • the AMF may transmit the processing result received from the LMF to another entity.
  • ng-eNB new generation evolved-NB
  • gNB are network elements of NG-RAN that can provide measurement results for location estimation, and can measure radio signals for target UEs and deliver the results to LMF.
  • the ng-eNB may control several TPs (transmission points) such as remote radio heads or PRS-only TPs supporting a PRS-based beacon system for E-UTRA.
  • the LMF is connected to the E-SMLC (Enhanced Serving Mobile Location Center), and the E-SMLC may enable the LMF to access the E-UTRAN.
  • E-SMLC is OTDOA, one of the E-UTRAN positioning methods using downlink measurement obtained by the target UE through signals transmitted from the eNB and/or PRS-only TPs in the E-UTRAN by the LMF. (Observed Time Difference Of Arrival) can be supported.
  • the LMF may be connected to the SLP (SUPL Location Platform).
  • the LMF can support and manage different location services for target UEs.
  • the LMF may interact with a serving ng-eNB or a serving gNB for a target UE in order to obtain a location measurement of the UE.
  • the LMF uses a location service (LCS) client type, a required QoS (Quality of Service), a UE positioning capabilities, a gNB positioning capability, and a ng-eNB positioning capability. Determine and apply this positioning method to the serving gNB and/or serving ng-eNB.
  • the LMF may determine a location estimate for the target UE and additional information such as location estimation and speed accuracy.
  • SLP is a Secure User Plane Location (SUPL) entity that is responsible for positioning through a user plane.
  • SUPL Secure User Plane Location
  • the UE can measure downlink signals through sources such as NG-RAN and E-UTRAN, different GNSS (Global Navigation Satellite System), TBS (Terrestrial Beacon System), WLAN access point, Bluetooth beacon, and UE barometric pressure sensor.
  • sources such as NG-RAN and E-UTRAN, different GNSS (Global Navigation Satellite System), TBS (Terrestrial Beacon System), WLAN access point, Bluetooth beacon, and UE barometric pressure sensor.
  • the UE may include an LCS application, and may access the LCS application through communication with a network to which the UE is connected or other applications included in the UE.
  • the LCS application may include the measurement and calculation functions required to determine the location of the UE.
  • the UE may include an independent positioning function such as a Global Positioning System (GPS), and may report the location of the UE independently of NG-RAN transmission.
  • GPS Global Positioning System
  • Such independently obtained positioning information may be used as auxiliary information of positioning information obtained from a network.
  • FIG. 9 shows an example implementation of a network for measuring the location of a UE.
  • CM-IDLE Connection Management-IDLE
  • the AMF receives a location service request
  • the AMF establishes a signaling connection with the UE and provides a network trigger service to allocate a specific serving gNB or ng-eNB. Can be requested.
  • This operation process is omitted in FIG. 9. That is, in FIG. 9, it may be assumed that the UE is in a connected mode. However, for reasons such as signaling and data inactivity, the signaling connection may be released by the NG-RAN while the positioning process is in progress.
  • a 5GC entity such as a GMLC may request a location service for measuring the location of the target UE with a serving AMF.
  • the serving AMF may determine that the location service for measuring the location of the target UE is required. For example, in order to measure the location of the UE for an emergency call, the serving AMF may directly determine to perform location service.
  • the AMF transmits a location service request to the LMF according to step 2, and according to step 3a, the LMF serves location procedures for obtaining location measurement data or location measurement assistance data ng-eNB, You can start with serving gNB.
  • the LMF may request location-related information related to one or more UEs from the NG-RAN, and may indicate a type of required location information and related QoS.
  • the NG-RAN may transmit location-related information to the LMF to the LMF in response to the request.
  • the location determination method according to the request is E-CID
  • the NG-RAN may transmit additional location-related information to the LMF through one or more NRPPa messages.
  • location-related information may mean actual location estimation information and all values used for location calculation, such as wireless measurement or location measurement.
  • the protocol used in step 3a may be the NRPPa protocol, which will be described later.
  • the LMF may initiate location procedures for downlink positioning together with the UE.
  • the LMF may transmit location assistance data to the UE or obtain a location estimate or location measurement.
  • a capability transfer process may be performed.
  • the LMF may request capability information from the UE, and the UE may transmit capability information to the LMF.
  • the capability information refers to various aspects of a specific location measurement method, such as information on a location measurement method that can be supported by LFM or UE, and various types of assistance data for A-GNSS.
  • the UE may provide capability information to the LMF.
  • an Assistance data transfer process may be performed in step 3b.
  • the UE may request location assistance data from the LMF, and may instruct the LMF of specific location assistance data required. Then, the LMF may transmit the location assistance data corresponding thereto to the UE, and additionally, may transmit additional assistance data to the UE through one or more additional LPP messages.
  • the location assistance data transmitted from the LMF to the UE may be transmitted through a unicast method, and in some cases, without the UE requesting the assistance data from the LMF, the LMF provides the location assistance data and/or Alternatively, additional auxiliary data may be transmitted to the UE.
  • a location information exchange process may be performed in step 3b.
  • the LMF may request the UE for location-related information related to the UE, and may indicate a type of required location information and related QoS. Then, the UE may transmit location-related information to the LMF to the LMF in response to the request. In this case, the UE may additionally transmit additional location-related information to the LMF through one or more LPP messages.
  • 'location-related information' may mean all values used for location calculation, such as actual location estimation information and radio measurement or location measurement, and is typically a UE from a plurality of NG-RANs and/or E-UTRANs.
  • RSTD Reference Signal Time Difference
  • step 3b is performed in the order of a capability transfer process, a location assistance data transfer process, and a location information transfer process, but is not limited to this sequence.
  • step 3b is independent of any specific order to improve the flexibility of the position measurement.
  • the UE may request location assistance data at any time to perform a location measurement request already requested by the LMF.
  • the LMF may request location information such as a location measurement value or a location estimate at any time.
  • the UE does not perform measurement for location estimation, it can transmit capability information to the LMF at any time.
  • an error message may be transmitted and received, and an Abort message for stopping position measurement may be transmitted and received.
  • the protocol used in step 3b may be an LPP protocol, which will be described later.
  • step 3b may be additionally performed after step 3a is performed, but may be performed instead of step 3a.
  • the LMF may provide a location service response to the AMF.
  • the location service response may include information on whether or not location estimation of the UE is successful and an estimate of the location of the UE.
  • the AMF may transmit a location service response to a 5GC entity such as GMLC, and if the procedure of FIG. 9 is initiated by step 1b, the AMF is In order to provide a service, a location service response may be used.
  • LTP LTE Positioning Protocol
  • LPP shows an example of a protocol layer used to support transmission of an LPP message between an LMF and a UE.
  • the LPP PDU may be transmitted through a NAS PDU between the MAF and the UE.
  • LPP includes a target device (eg, a UE in a control plane or a SET (SUPL Enabled Terminal) in a user plane) and a location server (eg, an LMF in the control plane or an SLP in the user plane). ) Can be terminated.
  • the LPP message may be delivered in the form of a transparent PDU through an intermediate network interface using an appropriate protocol such as NGAP through the NG-C interface, LTE-Uu and NAS/RRC through the NR-Uu interface.
  • the LPP protocol enables positioning for NR and LTE using a variety of positioning methods.
  • the target device and the location server may exchange capability information, auxiliary data for positioning, and/or location information.
  • error information exchange and/or an instruction to stop the LPP procedure may be performed through the LPP message.
  • NRPPa can be used for information exchange between the NG-RAN node and the LMF. Specifically, NRPPa may exchange E-CID for measurement transmitted from ng-eNB to LMF, data to support OTDOA positioning method, Cell-ID and Cell location ID for NR Cell ID positioning method, and the like.
  • the AMF can route NRPPa PDUs based on the routing ID of the associated LMF through the NG-C interface, even if there is no information on the associated NRPPa transaction.
  • the procedures of the NRPPa protocol for location and data collection can be divided into two types.
  • the first type is a UE associated procedure for delivering information on a specific UE (eg, location measurement information, etc.)
  • the second type is information applicable to the NG-RAN node and related TPs ( For example, it is a non-UE associated procedure for delivering gNB/ng-eNG/TP timing information, etc.).
  • the above two types of procedures may be supported independently or may be supported simultaneously.
  • the positioning methods supported by NG-RAN include GNSS, OTDOA, E-CID (enhanced cell ID), barometric pressure sensor positioning, WLAN positioning, Bluetooth positioning, terrestrial beacon system (TBS), and Uplink Time Difference of Arrival (UTDOA).
  • GNSS Global System for Mobile Communications
  • OTDOA enhanced cell ID
  • E-CID enhanced cell ID
  • barometric pressure sensor positioning
  • WLAN positioning
  • Bluetooth positioning
  • TBS terrestrial beacon system
  • UTDOA Uplink Time Difference of Arrival
  • UTDOA Uplink Time Difference of Arrival
  • the OTDOA positioning method uses the timing of measurement of downlink signals received from a plurality of TPs including an eNB, an ng-eNB and a PRS dedicated TP by the UE.
  • the UE measures the timing of the received downlink signals by using the location assistance data received from the location server.
  • the location of the UE may be determined based on the measurement result and the geographical coordinates of neighboring TPs.
  • the UE connected to the gNB may request a measurement gap for OTDOA measurement from the TP. If the UE does not recognize the SFN for at least one TP in the OTDOA assistance data, the UE requests an OTDOA reference cell before requesting a measurement gap for performing RSTD (Reference Signal Time Difference) measurement.
  • RSTD Reference Signal Time Difference
  • An autonomous gap can be used to obtain the SFN of.
  • the RSTD may be defined based on the smallest relative time difference between the boundaries of the two subframes each received from the reference cell and the measurement cell. That is, it may be calculated based on a relative time difference between the start times of the subframes of the reference cell closest to the start times of the subframes received from the measurement cell. Meanwhile, the reference cell may be selected by the UE.
  • TOA time of arrival
  • RSTD time of arrival
  • TP 1-TP 2 and TP 3 measure TOA for each of TP 1, TP 2 and TP 3
  • RSTD for TP 1-TP 2 measure TOA for each of TP 1, TP 2 and TP 3
  • RSTD for TP 1-TP 2 measure TOA for each of TP 1, TP 2 and TP 3
  • TP 3-TP 1 RSTD for RSTD may be calculated
  • a geometric hyperbola may be determined based on this
  • a point at which such hyperbola intersect may be estimated as the location of the UE.
  • the estimated UE location may be known as a specific range according to measurement uncertainty.
  • the RSTD for two TPs may be calculated based on [Equation 7] below.
  • Is the (unknown) coordinate of the target UE Is the coordinates of the (known) TP, May be the coordinates of the reference TP (or other TP).
  • Is a transmission time offset between the two TPs and may be referred to as “Real Time Differences” (RTDs)
  • RTDs Real Time Differences
  • n_i and n_1 may indicate values for UE TOA measurement errors.
  • the location of the UE can be measured through geographic information of the serving ng-eNB, serving gNB and/or serving cell of the UE.
  • geographic information of a serving ng-eNB, a serving gNB and/or a serving cell may be obtained through paging, registration, or the like.
  • the E-CID positioning method may use additional UE measurement and/or NG-RAN radio resources to improve the UE position estimate in addition to the CID positioning method.
  • some of the same measurement methods as the RRC protocol measurement control system may be used, but in general, additional measurements are not performed only for the location measurement of the UE.
  • a separate measurement configuration or measurement control message may not be provided, and the UE does not expect that an additional measurement operation only for location measurement is requested.
  • the UE may report a measurement value obtained through generally measurable measurement methods.
  • the serving gNB may implement the E-CID positioning method using E-UTRA measurements provided from the UE.
  • E-UTRA RSRP Reference Signal Received Power
  • E-UTRA RSRQ Reference Signal Received Quality
  • UE E-UTRA Rx-Tx Time difference GERAN/WLAN RSSI (Reference Signal Strength) Indication
  • UTRAN CPICH Common Pilot Channel
  • RSCP Receiveived Signal Code Power
  • ng-eNB receive-transmit time difference (Rx-Tx Time difference), Timing Advance (T_ADV), Angle of Arrival (AoA)
  • T_ADV may be classified into Type 1 and Type 2 as follows.
  • T_ADV Type 1 (ng-eNB receive-transmit time difference)+(UE E-UTRA receive-transmit time difference)
  • T_ADV Type 2 ng-eNB receive-transmit time difference
  • AoA can be used to measure the direction of the UE.
  • AoA may be defined as an estimated angle for the location of the UE in a counterclockwise direction from the base station/TP. In this case, the geographical reference direction may be north.
  • the base station/TP may use an uplink signal such as a sounding reference signal (SRS) and/or a demodulation reference signal (DMRS) for AoA measurement.
  • SRS sounding reference signal
  • DMRS demodulation reference signal
  • the larger the array of antenna arrays the higher the measurement accuracy of AoA.
  • signals received from adjacent antenna elements may have a constant phase-rotate phase.
  • UTDOA is a method of determining the location of the UE by estimating the arrival time of the SRS.
  • the serving cell is used as a reference cell, and the location of the UE may be estimated through the difference in the arrival time from another cell (or base station/TP).
  • the E-SMLC may indicate a serving cell of the target UE in order to indicate SRS transmission to the target UE.
  • the E-SMLC may provide configurations such as periodic/aperiodic SRS, bandwidth and frequency/group/sequence hopping.
  • Multi-cell RTT Multi-cell RTT
  • RTT is based on TOA measurements, like OTDOA, but coarse TRP (e.g. , Base station) Only timing synchronization is required.
  • FIG. 13 is a diagram for describing an embodiment of a multi-RTT (round trip time) positioning method.
  • an RTT process in which TOA measurement is performed in an initiating device and a responding device, and the responding device provides TOA measurement to an initiating device for RTT measurement (calculation) is illustrated.
  • the initiating device may be a TRP and/or a terminal
  • the responding device may be a terminal and/or a TRP.
  • the initiating device transmits an RTT measurement request, and the responding device may receive it.
  • the initiating device may transmit the RTT measurement signal at t0, and the responding device may acquire the TOA measurement t1.
  • the responding device may transmit the RTT measurement signal at t2, and the initiating device may acquire the TOA measurement t3.
  • the responding device may transmit information on [t2-t1], and the initiating device may receive the information and calculate the RTT based on Equation 8 below.
  • the information may be transmitted/received based on a separate signal, or included in the RTT measurement signal of 1305 to be transmitted/received.
  • the corresponding RTT may correspond to a double-range measurement between two devices. Positioning estimation may be performed from the corresponding information, and a multilateration technique may be used. Based on the measured RTT, d1, d2, d3 can be determined, and the target device location can be determined as the intersection point of the circumference centered on each BS1, BS2, BS3 (or TRP) and each d1, d2, d3 as the radius. have.
  • the UE may perform the DRX operation while performing the procedures and/or methods described/suggested above.
  • a terminal in which DRX is configured can reduce power consumption by discontinuously receiving DL signals.
  • DRX may be performed in Radio Resource Control (RRC)_IDLE state, RRC_INACTIVE state, and RRC_CONNECTED state.
  • RRC_IDLE state and RRC_INACTIVE state the DRX is used to receive paging signals discontinuously.
  • RRC_CONNECTED DRX DRX performed in the RRC_CONNECTED state will be described (RRC_CONNECTED DRX).
  • the DRX cycle consists of On Duration and Opportunity for DRX.
  • the DRX cycle defines a time interval in which On Duration is periodically repeated.
  • On Duration represents a time period during which the UE monitors to receive the PDCCH.
  • the UE performs PDCCH monitoring during On Duration. If there is a PDCCH successfully detected during PDCCH monitoring, the UE operates an inactivity timer and maintains an awake state. On the other hand, if there is no PDCCH successfully detected during PDCCH monitoring, the UE enters a sleep state after the On Duration ends. Accordingly, when DRX is configured, PDCCH monitoring/reception may be discontinuously performed in the time domain in performing the procedure and/or method described/proposed above.
  • a PDCCH reception opportunity (eg, a slot having a PDCCH search space) may be set discontinuously according to the DRX configuration.
  • PDCCH monitoring/reception may be continuously performed in the time domain.
  • a PDCCH reception opportunity (eg, a slot having a PDCCH search space) may be continuously set in the present invention.
  • PDCCH monitoring may be restricted in a time period set as a measurement gap.
  • Table 5 shows the process of the terminal related to DRX (RRC_CONNECTED state).
  • DRX configuration information is received through higher layer (eg, RRC) signaling, and whether DRX ON/OFF is controlled by a DRX command of the MAC layer.
  • RRC Radio Resource Control
  • the UE may discontinuously perform PDCCH monitoring in performing the procedures and/or methods described/suggested in the present invention, as illustrated in FIG. 14.
  • Type of signals UE procedure 1 st step RRC signaling (MAC-CellGroupConfig) -Receive DRX configuration information 2 nd Step MAC CE ((Long) DRX command MAC CE) -Receive DRX command 3 rd Step - -Monitor a PDCCH during an on-duration of a DRX cycle
  • the MAC-CellGroupConfig includes configuration information required to set a medium access control (MAC) parameter for a cell group.
  • MAC-CellGroupConfig may also include configuration information about DRX.
  • MAC-CellGroupConfig defines DRX and may include information as follows:-Value of drx-OnDurationTimer: Defines the length of the start section of the DRX cycle.
  • -Value of drx-InactivityTimer Defines the length of the time interval in which the UE is awake after the PDCCH opportunity in which the PDCCH indicating initial UL or DL data is detected
  • -Value of drx-HARQ-RTT-TimerDL Defines the length of the maximum time interval from receiving the initial DL transmission until the DL retransmission is received.
  • the UE performs PDCCH monitoring at every PDCCH opportunity while maintaining the awake state.
  • FIGS. 15 to 16 Prior to the detailed description, an example of an operation implementation of a terminal and a network node according to an embodiment of the present disclosure will be described with reference to FIGS. 15 to 16.
  • FIG. 15 is a diagram for describing an example of an operation implementation of a terminal according to the present disclosure.
  • information on a downlink (DL) RS resource related to transmission of an SRS may be received (S1501).
  • the terminal may determine the transmission power for transmitting the SRS based on whether or not the path loss according to the information on the DL RS resource is measured (S1503), and the SRS according to the transmission power Can be transmitted (S1505).
  • a specific method of transmitting the SRS by the UE of S1501 to S1505 may be based on the embodiments and features described later.
  • the terminal of FIG. 15 may be any one of various wireless devices disclosed in FIGS. 18 to 21.
  • the terminal of FIG. 15 may be the first wireless device 100 of FIG. 18 or the wireless devices 100 and 200 of FIG. 19.
  • the operation process of FIG. 15 may be performed and executed by any one of various wireless devices disclosed in FIGS. 18 to 21.
  • FIG. 16 is a diagram illustrating an example of an operation implementation of a network node according to the present disclosure.
  • information on a downlink (DL) RS resource related to transmission of an SRS may be transmitted to a terminal (S1601). Thereafter, the SRS may be received from the terminal (S1603).
  • DL downlink
  • S1603 the terminal
  • a specific method of receiving the SRS by the network nodes of S1601 to S1603 may be based on embodiments and features described later.
  • the network node of FIG. 16 may be any one of various wireless devices disclosed in FIGS. 18 to 21.
  • the network node of FIG. 16 may be the second wireless device 200 of FIG. 18 or the wireless devices 100 and 200 of FIG. 19.
  • the operation process of FIG. 16 may be performed and executed by any one of various wireless devices disclosed in FIGS. 18 to 21.
  • step S1601 the step of determining the transmission power for transmitting the SRS based on whether the path loss is measured by receiving information on the downlink (DL) RS resource related to the transmission of the SRS (S1501 to S1503)
  • step S1601 a detailed embodiment of determining SRS transmission power when a path-loss reference cannot be obtained based on information received by the terminal will be described.
  • a power control function for a sounding reference signal is introduced in consideration of not only the serving cell of the terminal but also other cells or adjacent cells.
  • SRS sounding reference signal
  • Support for configuration of a DL reference signal of a neighboring cell 2) A signaling method and procedure for configuration of a DL reference signal of a neighboring cell, 3) Fall-back when the UE fails to obtain a path-loss reference It includes a discussion of procedures and 4) setting the number of path loss measurements.
  • UL RS uplink reference signal
  • the base station or the location server transmits a downlink reference signal (DL RS) transmitted through one or more CSI-RS resources, one or more SSBs, or one or more PRS resources from a specific neighboring cell or another cell.
  • DL RS downlink reference signal
  • the terminal is instructed or configured to be used as a signal for a path loss reference, there may be a case in which the terminal does not properly receive the RS resource transmitted from the specific neighboring cell or another cell.
  • data and/or a reference signal from a serving cell may be transmitted to a time/frequency resource region in which a specific reference signal is set to be transmitted from a certain cell, and thus a corresponding specific reference signal may not be received.
  • reception strength such as Reference Signal Received Power (RSRP) of a specific reference signal to be received from a certain cell, or Signal to Noise Power Ratio (SNR)/Signal to Interference plus Noise Power Ratio (SINR) ) Is too low to detect the specific reference signal.
  • RSRP Reference Signal Received Power
  • SNR Signal to Noise Power Ratio
  • SINR Signal to Interference plus Noise Power Ratio
  • the UE since the UE cannot receive a specific DL RS to be received through a specific cell, it cannot use the specific DL RS as a signal for path loss reference.Therefore, a problem may occur in the calculation of the transmission power of the UE. There may be a need for a method of operating a terminal, a base station, and/or a location server that can compensate for this problem.
  • the terminal in particular, in relation to the SRS (Sounding Reference Signal) of the terminal, in setting the power control of the SRS in consideration of not only the serving cell but also other cells or neighboring cells, the terminal is transmitted from another cell or neighboring cell.
  • a cell referred to in the present disclosure below may be used as a concept of a meaning dealing with a base station, a transmission point (TP) and/or a transmission and reception point (TRP).
  • the terminal can operate as follows.
  • the terminal may not transmit the SRS resource to be transmitted. That is, the terminal may not transmit the SRS resource configured to transmit the specific neighboring cell or another cell to a target from the base station or the location server.
  • the UE does not transmit the SRS resource and reports to the base station or the location server that it has not properly received the DL RS resource transmitted from the specified neighboring cell or other cell, or transmitted from the specified neighboring cell or other cell It can be reported to the base station or the location server that the appropriate measurement (measurement) result for the DL RS has not been obtained.
  • the SRS non-transmission operation of the terminal and/or the reporting operation of the terminal to the base station or location server related thereto may be indicated or set in advance from the base station or the location server.
  • the amount of power required when the UE transmits the SRS resource is much smaller than the amount of power required when the base station/TP/location server transmits the DL RS resource.
  • the operation of the terminal as described above may be meaningful in terms of preventing power waste. That is, if the UE fails to receive the DL RS resource transmitted from a specific neighboring cell or another cell, even if the UE transmits the SRS resource, the target cell/gNG/TP to receive the SRS resource properly receives the corresponding SRS resource. There is a high probability of not being able to do so. In this situation, it may be helpful in terms of the performance of the overall wireless network that the UE does not transmit the SRS resource rather than having to transmit the SRS resource to cause interference to other cells.
  • the UE uses DL RS resources that can obtain a measurement result among DL RS resources transmitted from an adjacent cell or another cell other than the serving cell.
  • DL RS resources that can obtain a measurement result among DL RS resources transmitted from an adjacent cell or another cell other than the serving cell.
  • the average value of the path loss compensation value refer to the path loss for the DL RS resource that was originally the object of measurement but did not obtain the measurement result or the DL RS resource that was instructed to calculate the original path loss but was not received. Can be used as a value.
  • the UE may transmit the corresponding SRS resource using the maximum power that can be allocated by the UE without setting the SRS transmission power through path loss calculation.
  • the SRS transmission operation of the terminal through the maximum available power may be instructed or set in advance from the base station or the location server. Since the SRS resource to be transmitted by the UE is set for a specific neighboring cell or another cell, the UE uses the maximum transmission power for transmission of the SRS when considering the detectability of the SRS resource of the specific neighboring cell or other cell. This may be a suitable option.
  • the UE may transmit the corresponding SRS resource using the SRS transmission power currently indicated or set from its serving cell. That is, transmission power for the SRS resource to be transmitted to a specific adjacent cell or another cell may be set according to a power control setting used when transmitting the SRS resource by targeting the serving cell.
  • the UE receives a Synchronization Signal/Physical Broadcast Channel (SSB) block to obtain a Master Information Block (MIB). If the UE transmits the SRS, the path loss value for power control of the SRS If it is determined that is not accurately measured, the UE may calculate a path loss value for power control of the SRS using a reference resource obtained from the SSB block of the serving cell for receiving the MIB.
  • SSB Synchronization Signal/Physical Broadcast Channel
  • MIB Master Information Block
  • the transmission power of the SRS is determined according to the above formula, which represents the path loss measurement value among the factors of the formula.
  • the factor can be calculated using reference resources obtained from the SSB block of the serving cell for receiving the MIB.
  • the operation of the terminal performing SRS transmission to a specific neighboring cell or another cell by using the power setting of the serving cell may be indicated or set in advance from the base station or the location server.
  • the UE applies a specific power offset to the transmission power used when transmitting the SRS resource by targeting the serving cell, and uses a specific neighboring cell through a transmission power higher by the specific offset.
  • SRS resources may be transmitted to other cells.
  • the specific offset value may be set from the base station to the terminal through signaling of various layers, such as radio resource control (RRC) signaling, medium access control-control element (MAC-CE) signaling, or downlink control information (DCI) signaling, or
  • the terminal may be configured to determine and apply a specific offset value as described above and report the offset value used by the terminal to the base station.
  • the offset value used for determining the transmission power may be a relative ratio of the amount of power that can be used when transmitting the SRS resource to a specific neighboring cell or another cell to the amount of power used when transmitting the SRS resource to the serving cell, and / Or may be an absolute value indicating the difference between the amount of power used when transmitting the SRS resource to the serving cell and the amount of power that can be used when transmitting the SRS resource to a specific adjacent cell or other cell.
  • the offset value used for determining the transmission power is not limited to a positive (+) value as in the above example, and is used when transmitting the SRS resource to a specific neighboring cell or another cell as the offset value has a negative (-) value.
  • the transmitted power may be lowered by an offset value than the transmit power used when transmitting the SRS resource by targeting the serving cell.
  • the UE may request that the base station directly indicate or set the transmission power for the SRS resource to be transmitted to a specific neighboring cell or another cell.
  • the base station receiving the request of the terminal instructs the terminal of an offset that can be applied to the transmission power used when transmitting the SRS resource by targeting the serving cell, or the transmission power used when transmitting the SRS resource to a specific neighboring cell or another cell. You can also indicate an absolute value.
  • the terminal can perform the following operations, which is described above in the first embodiment. It can be applied similarly to the operation examples.
  • the UE may not transmit the SRS resource to the neighboring cell targeted for transmission, and may inform the network that normal SRS resource transmission to the neighboring cell is impossible.
  • the UE may transmit the SRS resource by allocating the maximum transmit power available to the corresponding adjacent cell.
  • the UE may transmit the SRS resource to a corresponding neighboring cell according to the transmit power available for the serving cell.
  • the UE may receive an indication of power setting used for a corresponding neighboring cell through a serving cell, and may transmit an SRS resource to a corresponding neighboring cell by using transmission power allocated through the indicated power setting.
  • the indicated power setting may be a power offset that can be additionally applied to transmit power that can be used for the original serving cell.
  • the UE transmits the SRS resource with the maximum available power
  • the maximum power will be much lower than the base station transmission power of the adjacent cell. It may be difficult for the TP to detect the SRS resource transmitted from the terminal based on the maximum power. Therefore, in such a case, it may be most appropriate for the UE to not transmit the SRS resource to the adjacent cell as a transmission target to prevent power waste among the above operation examples.
  • the UE may be indicated or configured as a QCL resource of a Quasi Co-Located (QCL) type D of another DL RS resource, a DL RS resource transmitted in a specific neighboring cell or another cell other than the serving cell.
  • the UE may set or receive a DL RS resource transmitted in a specific neighboring cell or another cell other than the serving cell as a resource of spatial relation information for a specific UL SRS resource. Through this, the UE performs measurement on a DL RS resource transmitted from a specific neighboring cell or another cell, and may receive another DL RS resource or transmit a UL SRS resource in a direction in which the corresponding DL RS resource is received.
  • the UE transmits in a specific neighboring cell or another cell due to reasons such as interference from other resources and/or inability to detect due to excessively low signal strength. It may not be able to properly obtain a measurement result for the DL RS resource.
  • the UE reports to the base station that the DL RS resource of the measurement target transmitted from the specific neighboring cell or another cell is indicated or configured as a QCL type D resource, but the direction in which the corresponding DL RS resource is received cannot be accurately known, or Alternatively, feedback such as that the measurement quality for the DL RS resource of the corresponding measurement target is too low may be reported to the base station.
  • the UE A fall-back QCL resource that can be used when the measurement result for the measurement is not properly obtained due to the above-described reasons, etc. may be indicated or set by the base station to the terminal.
  • the fallback QCL resource may be set to QCL type D in the same way as the type of the initially set QCL resource, but is not limited thereto, and other types may also be set.
  • the UE may request an indication or setting of the fallback QCL resource from the base station.
  • the UE reports to the base station that a DL RS resource transmitted from a specific neighboring cell or another cell is configured or instructed as a resource of spatial relation information for a specific UL SRS resource, but the direction in which the corresponding DL RS resource is received cannot be accurately known.
  • feedback such as that the measurement quality for the corresponding DL RS resource is too low may be reported to the base station.
  • the UE when the UE is instructed or configured as a resource of spatial relation information for a specific UL SRS resource in the DL RS resource transmitted from the specific neighboring cell or another cell, the UE reports the measurement result for the DL RS resource.
  • Substitute spatial relation information that can be used when it is not properly obtained due to one reason or the like may be indicated or set by the base station to the terminal.
  • the alternative spatial relation information means spatial relation information for a resource that can be used as a fallback RS resource.
  • the UE may request an indication or configuration of the alternative spatial relation information and fallback from the base station.
  • the UE can be indicated or configured as a Quasi Co-Located (QCL) type D QCL resource of another DL RS resource for the DL RS resource transmitted from the serving cell, as well as transmitted in a specific neighbor cell/TP or another cell/TP.
  • the DL RS resource may be indicated or set as a QCL type D QCL resource of another DL RS resource.
  • the UE may set or receive a DL RS resource transmitted from a serving cell and/or a UL SRS resource to be used for SRS transmission as a resource of spatial relation information of a specific UL SRS resource, as well as a specific neighbor cell/TP or other
  • a DL RS resource transmitted in a cell/TP and/or a UL SRS resource to be used for SRS transmission may be configured or indicated as a resource of spatial relation information of a specific UL SRS resource.
  • the specific UL SRS resource indicated by the UE as a target of spatial relation information may be an SRS resource or a set of SRS resources set for UE positioning purposes.
  • the UE configures or receives an indication of the QCL resource of the QCL type D for the DL RS resource and the UL SRS resource that is the target of spatial relation information
  • the related cell and/or TP together with the information on the RS resource Information can be set together.
  • a configuration subject of a QCL type D QCL resource for a DL RS resource and a UL SRS resource that is a target of spatial relation information may be a location server or a base station.
  • the UE Through the configuration of the QCL type D QCL resource for the DL RS resource, the UE performs measurement on the DL RS resource transmitted from an adjacent cell or another cell, and receives another DL RS resource in the direction in which the corresponding DL RS resource is received. Or it can transmit UL SRS resources.
  • the UE is a DL RS resource transmitted from a specific neighboring cell or another cell other than the serving cell due to reasons such as interference effect of other resources and/or undetectable due to excessively low signal strength, that is, PRS resource, SSB And/or it may not be possible to obtain a measurement result of the CSI-RS resource for Radio Resource Management (RRM).
  • RRM Radio Resource Management
  • the UE uses a DL RS resource transmitted from a specific neighboring cell or another cell other than the serving cell, that is, a PRS resource, an SSB and/or a CSI-RS resource, as a resource of spatial relation information of a specific UL SRS resource. And/or it may be set or instructed from the location server/LMF.
  • the specific UL SRS resource as a target of spatial relation information may be set exclusively for the terminal for positioning of the terminal. In such a case, if the UE has not properly obtained or has not received the measurement result of the DL RS resource transmitted from a specific neighboring cell or other cell other than the serving cell, the UE may consider performing the following operations. have.
  • the terminal reports to the base station or the location server that it has not properly received the PRS resource, SSB and/or CSI-RS resource, which are resources of spatial relation information set or indicated by the base station or the location server, or It can report to the base station or the location server that it was not properly detected.
  • the UE may not transmit the SRS resource or may transmit the SRS resource as a Zero-Power SRS resource.
  • the terminal may request the base station or the location server to provide an angle offset.
  • the angle offset is an angle value that can indicate a certain direction such as clockwise or counterclockwise based on a specific transmission and/or reception beam of the terminal, and may be indicated or set to the terminal.
  • the angle offset may be indicated or set to the terminal as an angle value for a certain direction based on a specific position or direction of absolute/relative coordinates that the terminal and the base station or the location server can know.
  • the terminal may request the base station or the location server to reset spatial relation information, or may request to set other spatial relation information.
  • the setting of spatial relation information may be understood as setting not only information on a DL RS resource or UL SRS resource transmitted for another cell/TP, but also information about a corresponding other cell/TP.
  • the UE may use only cell/TP information among resource configuration information through spatial relation information.
  • the terminal can determine the location of the cell/TP through the ID information of the cell/TP, and transmit a Tx beam directed to the cell/TP.
  • the terminal may decide.
  • the UE knows that the information on the cell/TP has been set, so other DL RS resources received from the cell/TP
  • the DL RS resource that has been successfully received in the middle can be used as an alternative for setting spatial relation information. That is, among information about the cell/TP and RS information set as spatial relation information resources of the SRS resource, only the information about the cell/TP is used to find the DL RS resource transmitted from the cell/TP and use it to determine the beam direction. I can.
  • the maximum power available when transmitting the SRS resource can be used.
  • such a fallback operation of the terminal can be set or instructed from the base station or the location server, and power control for setting the maximum power available for the terminal to transmit SRS resources can be used regardless of the transmission beam direction of the terminal.
  • the base station or the location server can instruct or configure the terminal to use a specific SRS resource ID of the terminal and/or a specific DL RS resource ID transmitted from the serving cell/TP as fallback configuration for the spatial relation information of the SRS resource. .
  • the SRS resource and/or SRS resource set mentioned below may be an SRS resource and/or an SRS resource set for the purpose of performing a location measurement of a terminal.
  • the SRS resource for performing the location of the terminal may be set or indicated to the terminal from the base station, or may be set or indicated to the terminal from the location server/LMF. Therefore, the operation of the terminal mentioned in the following disclosure is the base station This can be set or dictated, or the location server/LMF can dictate or set.
  • the path-loss reference dealt with in this embodiment is not only information on a specific DL RS resource, but also information on a specific cell/TP through which the corresponding DL RS resource is transmitted, such as physical cell ID(s)/TP ID(s), etc. It may be set or indicated as included in the form of. Therefore, the path-loss reference including information such as cell ID(s)/TP ID(s), etc. is for UE positioning in that the UE can transmit SRS not only to the serving cell/TP but also to the neighboring cell/TP. Can be used primarily.
  • the UE determines the transmission power for transmitting a specific SRS resource or a certain SRS resource within a specific SRS resource set, in the case of a DL RS resource set as a path-loss reference from a base station or a location server, the strength of the received signal is too small.
  • reception or detection fails for reasons such as failure to perform appropriate detection, and the reception or detection succeeds only for the DL RS resource set as spatial relation information for determining the direction of the transmission beam for the SRS resource to be transmitted. have.
  • the UE's transmission beam is configured in a direction in which several cells/TPs exist in a similar direction, and the transmit power of the SRS is the farthest cell among the several cells/TPs. If set or indicated to be determined based on /TP, the DL RS resource for path-loss reference set from the farthest cell/TP may not be detected by the UE because its reception strength is weak. In this case, the terminal or the base station/location server may perform the following operations.
  • the terminal has received the DL RS resource set as spatial relation information to the base station/location server without properly receiving or detecting the path-loss reference RS used to determine the transmission power for transmitting the SRS resource. I can tell.
  • the UE may request to reset or re-instruct the path-loss reference for the SRS resource, or may request to update the path-loss reference for the SRS resource.
  • the UE is a path-loss reference for determining transmission power for transmitting the SRS resource, information on the DL RS resource set as spatial relation information for the SRS resource and/or a cell in which the corresponding DL RS resource is transmitted Information about /TP is available. Additionally, the terminal may set or receive such an operation from the base station/location server.
  • the terminal itself has failed to receive or detect a path-loss reference for determining the transmission power for transmitting the SRS resource, but identifies one or more neighboring cells/TPs to which the SRS resource is to be transmitted and the direction of the transmission beam, and Therefore, the SRS resource can be transmitted using the maximum power available to the terminal.
  • the UE applies a specific power offset to the transmission power of the SRS resource determined based on the serving cell/TP or the reference cell/TP, and determines the SRS based on the serving cell/TP or the reference cell/TP.
  • the SRS resource may be transmitted with a power that is as high as a specific power offset value to the transmission power of the resource.
  • the value of the power offset used to determine the SRS transmission power is the above situation in which the terminal fails to receive or detect the path-loss reference, but knows the direction of the transmission beam and one or more adjacent cells/TPs to which the SRS resource is to be transmitted.
  • the base station/location server may set or instruct the terminal to be used by default.
  • the base station/location server You can also set or indicate an offset.
  • the base station/location server may set or instruct the terminal to use the power offset as described above for determining the SRS transmission power.
  • the UE may determine the direction of transmitting the SRS resource according to the setting of spatial relation information, but the transmission power for transmitting the SRS resource may be determined based on a specific RS such as the SSB of the serving cell, and the operation of the UE is
  • the base station/location server can set or instruct the terminal.
  • the terminal may not transmit the SRS resource. That is, the terminal may transmit the SRS resource as Zero-Power.
  • such an operation can be set or directed by the base station/location server to the terminal, and at this time, since the location server uses the SRS resource to measure RTOA, the terminal indicates that the SRS resource has not been transmitted. /You need to tell the location server.
  • the UE determines the transmission power for transmitting a specific SRS resource or a certain SRS resource in a specific SRS resource set, it succeeds in receiving or detecting the DL RS resource set as the path-loss reference, and the SRS resource to be transmitted.
  • reception or detection fails for a DL RS resource set as spatial relation information for determining a direction of a transmission beam for transmission.
  • the terminal may inform the base station/location server that the terminal itself has received a path-loss reference signal used for determining transmission power for transmitting the SRS resource without receiving the DL RS resource set as spatial relation information. .
  • the UE may request to reset or re-instruct spatial relation information for SRS resources, or request to update spatial relation information for SRS resources.
  • the UE is spatial relation information for SRS resources, information on DL RS resources set as a path-loss reference for determining transmission power for transmitting the SRS resources and/or corresponding DL RS resources are transmitted. Information about cell/TP can be used. Additionally, the terminal may set or receive such an operation from the base station/location server.
  • the terminal may determine the direction of transmitting the SRS resource based on a specific RS such as the SSB of the serving cell, and the operation of the terminal may be set or indicated by the base station/location server to the terminal.
  • a specific RS such as the SSB of the serving cell
  • the terminal may not transmit the SRS resource. That is, the terminal can transmit the SRS resource as Zero-Power, and similarly, such an operation can be set or directed by the base station/location server to the terminal. If the UE transmits the SRS resource to the neighboring cell/TP in the incorrect direction, the cell/TP that is the actual transmission target may not properly receive the SRS resource and may only generate unnecessary interference, depending on the situation. In this way, it may be reasonable to transmit the SRS resource to Zero-Power.
  • reception or detection of the DL RS resource set as a path-loss reference fails, and spatial relation information is used.
  • the reception or detection of the configured DL RS resource may also fail.
  • the terminal may not transmit the SRS resource, and the base station/location server may instruct the operation of the terminal. That is, if the UE fails to receive both the DL RS resource set as spatial relation information for the SRS resource and the DL RS resource used as a path-loss reference for the SRS resource, the UE does not transmit the SRS resource. Can be indicated or set. In addition, such an SRS non-transmission operation of the UE is performed by default when reception of both the DL RS resource set as spatial relation information and the DL RS resource used as a path-loss reference for the SRS resource fails. It may be defined, and the terminal may report to the base station/location server that the SRS resource has not been transmitted.
  • the terminal may transmit the SRS resource with the maximum transmission power available based on a specific direction selected by the terminal itself or by assuming a specific DL RS resource as a target resource of spatial relation information. .
  • the UE cannot obtain the path-loss reference configuration for the adjacent cell/TP, it is necessary for the UE to allocate a larger transmission power for transmission of the SRS resource for the adjacent cell/TP. It can be reasonable.
  • the SRS resource may be received from the terminal for a plurality of cells/TPs within a similar direction range.
  • the UE may be instructed to transmit the SRS resource intended for a plurality of cells/TPs, but all of the plurality of cells/TPs cannot detect the corresponding SRS resource.
  • the UE may be configured with a DL RS resource as a resource of spatial relation information for determining a transmission beam direction, and another DL RS resource as a path-loss reference for calculating a path loss may also be configured.
  • the UE even if the UE properly detects the DL RS resource as the resource of spatial relation information for transmitting the SRS resource from the neighboring cell/TP, the UE is used as a path loss reference for determining the transmission power of the SRS resource to be transmitted.
  • the path loss is calculated using the SSB received from the serving cell.
  • the UE can receive the DL RS resource as a resource of spatial relation information for transmitting the SRS resource from the neighboring cell/TP, the UE serves even if it cannot obtain the measurement result for the DL RS resource set as a path loss reference. Compared to transmitting the SRS resource to the cell, it is necessary to transmit the SRS resource by allocating a larger transmission power. Briefly, for example, the terminal can transmit the SRS resource with the maximum available transmission power.
  • the terminal may be a case where it is difficult to determine a transmission beam direction because the terminal cannot receive a DL RS resource as a resource of spatial relation information for transmitting an SRS resource from an adjacent cell/TP. If the SRS resource is transmitted in any direction while the transmission target cell/TP is highly likely not to receive it, it may be inappropriate to allow the UE to perform SRS transmission even in this case. Therefore, in such a situation, the terminal must inform the base station that it has not received the DL RS resource as a resource of spatial relation information for transmitting the SRS resource from the neighboring cell/TP, and the terminal has not properly obtained the spatial relation information.
  • the base station recognizing is may reset spatial relation information for the UE to transmit SRS resources.
  • the SRS mentioned in the present invention may be an SRS resource and/or an SRS resource set set or indicated for the purpose of UE positioning, and the setting or indication of an SRS resource or an SRS resource set may be received from a base station and/or a location server.
  • the content of spatial relation information as a configuration for the SRS resource can be confirmed in the above-described 3GPP TS 38.331 and 3GPP TS 38.214.
  • FIG. 17 illustrates a communication system 1 applied to the present invention.
  • a communication system 1 applied to the present invention includes a wireless device, a base station, and a network.
  • the wireless device refers to a device that performs communication using a wireless access technology (eg, 5G NR (New RAT), LTE (Long Term Evolution)), and may be referred to as a communication/wireless/5G device.
  • wireless devices include robots 100a, vehicles 100b-1 and 100b-2, eXtended Reality (XR) devices 100c, hand-held devices 100d, and home appliances 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400.
  • the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication.
  • the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone).
  • UAV Unmanned Aerial Vehicle
  • XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, including HMD (Head-Mounted Device), HUD (Head-Up Display), TV, smartphone, It can be implemented in the form of a computer, wearable device, home appliance, digital signage, vehicle, robot, and the like.
  • Portable devices may include smart phones, smart pads, wearable devices (eg, smart watches, smart glasses), computers (eg, notebook computers, etc.).
  • Home appliances may include TVs, refrigerators, and washing machines.
  • IoT devices may include sensors, smart meters, and the like.
  • the base station and the network may be implemented as a wireless device, and the specific wireless device 200a may operate as a base station/network node to another wireless device.
  • the wireless devices 100a to 100f may be connected to the network 300 through the base station 200.
  • AI Artificial Intelligence
  • the network 300 may be configured using a 3G network, a 4G (eg, LTE) network, or a 5G (eg, NR) network.
  • the wireless devices 100a to 100f may communicate with each other through the base station 200 / network 300, but may perform direct communication (e.g. sidelink communication) without going through the base station / network.
  • the vehicles 100b-1 and 100b-2 may perform direct communication (e.g.
  • V2V Vehicle to Vehicle
  • V2X Vehicle to Everything
  • the IoT device eg, sensor
  • the IoT device may directly communicate with other IoT devices (eg, sensors) or other wireless devices 100a to 100f.
  • Wireless communication/connections 150a, 150b, and 150c may be established between the wireless devices 100a to 100f / base station 200 and the base station 200 / base station 200.
  • the wireless communication/connection includes various wireless access such as uplink/downlink communication 150a, sidelink communication 150b (or D2D communication), base station communication 150c (eg relay, Integrated Access Backhaul). This can be achieved through technology (eg 5G NR)
  • wireless communication/connections 150a, 150b, 150c the wireless device and the base station/wireless device, and the base station and the base station can transmit/receive radio signals to each other.
  • the wireless communication/connection 150a, 150b, 150c can transmit/receive signals through various physical channels.
  • the first wireless device 100 and the second wireless device 200 may transmit and receive wireless signals through various wireless access technologies (eg, LTE and NR).
  • ⁇ the first wireless device 100, the second wireless device 200 ⁇ is the ⁇ wireless device 100x, the base station 200 ⁇ and/or ⁇ wireless device 100x, wireless device 100x) of FIG. ⁇ Can be matched.
  • the first wireless device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and/or one or more antennas 108.
  • the processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein.
  • the processor 102 may process information in the memory 104 to generate first information/signal, and then transmit a radio signal including the first information/signal through the transceiver 106.
  • the processor 102 may store information obtained from signal processing of the second information/signal in the memory 104 after receiving a radio signal including the second information/signal through the transceiver 106.
  • the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102.
  • the memory 104 may perform some or all of the processes controlled by the processor 102, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flow charts disclosed in this document. It can store software code including
  • the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR).
  • the transceiver 106 may be coupled with the processor 102 and may transmit and/or receive radio signals through one or more antennas 108.
  • the transceiver 106 may include a transmitter and/or a receiver.
  • the transceiver 106 may be mixed with an RF (Radio Frequency) unit.
  • the wireless device may mean a communication modem/circuit/chip.
  • the following operations are described based on the control operation of the processor 102 from the perspective of the processor 102, but may be stored in the memory 104 in software code or the like for performing these operations.
  • the processor 102 may control the transceiver 106 to receive information on a downlink (DL) RS resource related to transmission of a sounding reference signal (SRS). In addition, the processor 102 may determine the transmission power for transmitting the SRS based on whether a path loss is measured according to information on the DL RS resource. Further, the processor 102 may control the transceiver 106 to transmit the SRS according to the transmission power. At this time, the processor 102 controls the transceiver 106 to receive information on downlink (DL) RS resources related to transmission of the SRS, and transmits the SRS according to the transmission power. A specific method of controlling the may be based on the above-described embodiments.
  • DL downlink
  • SRS sounding reference signal
  • the following operations are described based on the control operation of the processor 202 from the perspective of the processor 202, but may be stored in the memory 204, such as software code for performing these operations.
  • the processor 202 may control the transceiver 206 to transmit information on a downlink (DL) RS resource related to transmission of a sounding reference signal (SRS). In addition, the processor 202 may control the transceiver 206 to receive the SRS. In this case, a specific method of controlling the transceiver 206 to transmit information on a downlink (DL) RS resource related to transmission of the SRS by the processor 202 and controlling the transceiver 206 to receive the SRS May be based on the above-described embodiments.
  • one or more protocol layers may be implemented by one or more processors 102, 202.
  • one or more processors 102, 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP).
  • One or more processors 102, 202 may be configured to generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the description, functions, procedures, proposals, methods, and/or operational flow charts disclosed in this document. Can be generated.
  • PDUs Protocol Data Units
  • SDUs Service Data Units
  • One or more processors 102, 202 may generate messages, control information, data, or information according to the description, function, procedure, suggestion, method, and/or operational flow chart disclosed herein.
  • At least one processor (102, 202) generates a signal (e.g., a baseband signal) including PDU, SDU, message, control information, data or information according to the functions, procedures, proposals and/or methods disclosed herein. , It may be provided to one or more transceivers (106, 206).
  • One or more processors 102, 202 may receive signals (e.g., baseband signals) from one or more transceivers 106, 206, and the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed herein PDUs, SDUs, messages, control information, data, or information may be obtained according to the parameters.
  • signals e.g., baseband signals
  • One or more of the processors 102 and 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer.
  • One or more of the processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof.
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • DSPDs Digital Signal Processing Devices
  • PLDs Programmable Logic Devices
  • FPGAs Field Programmable Gate Arrays
  • the description, functions, procedures, suggestions, methods, and/or operational flow charts disclosed in this document may be implemented using firmware or software, and firmware or software may be implemented to include modules, procedures, functions, and the like.
  • the description, functions, procedures, proposals, methods and/or operational flow charts disclosed in this document are included in one or more processors 102, 202, or stored in one or more memories 104, 204, and are It may be driven by the above processors 102 and 202.
  • the descriptions, functions, procedures, proposals, methods and/or operational flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and/or a set of instructions.
  • One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions.
  • One or more memories 104 and 204 may be composed of ROM, RAM, EPROM, flash memory, hard drive, register, cache memory, computer readable storage medium, and/or combinations thereof.
  • One or more memories 104 and 204 may be located inside and/or outside of one or more processors 102 and 202.
  • one or more memories 104, 204 may be connected to one or more processors 102, 202 through various technologies such as wired or wireless connection.
  • One or more transceivers 106 and 206 may transmit user data, control information, radio signals/channels, and the like mentioned in the methods and/or operational flow charts of this document to one or more other devices.
  • One or more transceivers (106, 206) may receive user data, control information, radio signals/channels, etc. mentioned in the description, functions, procedures, suggestions, methods and/or operation flow charts disclosed in this document from one or more other devices.
  • one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202, and may transmit and receive wireless signals.
  • one or more processors 102, 202 may control one or more transceivers 106, 206 to transmit user data, control information, or radio signals to one or more other devices.
  • one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or radio signals from one or more other devices.
  • one or more transceivers (106, 206) may be connected with one or more antennas (108, 208), and one or more transceivers (106, 206) through one or more antennas (108, 208), the description and functionality disclosed in this document. It may be set to transmit and receive user data, control information, radio signals/channels, and the like mentioned in a procedure, a proposal, a method, and/or an operation flowchart.
  • one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
  • One or more transceivers (106, 206) in order to process the received user data, control information, radio signal / channel, etc. using one or more processors (102, 202), the received radio signal / channel, etc. in the RF band signal. It can be converted into a baseband signal.
  • One or more transceivers 106 and 206 may convert user data, control information, radio signals/channels, etc. processed using one or more processors 102 and 202 from a baseband signal to an RF band signal.
  • one or more of the transceivers 106 and 206 may include (analog) oscillators and/or filters.
  • the wireless device may be implemented in various forms according to use-examples/services (see FIG. 17).
  • the wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 18, and various elements, components, units/units, and/or modules ) Can be composed of.
  • the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140.
  • the communication unit may include a communication circuit 112 and a transceiver(s) 114.
  • communication circuitry 112 may include one or more processors 102 and 202 and/or one or more memories 104 and 204 of FIG. 18.
  • the transceiver(s) 114 may include one or more transceivers 106,206 and/or one or more antennas 108,208 of FIG. 18.
  • the control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls all operations of the wireless device.
  • the controller 120 may control the electrical/mechanical operation of the wireless device based on the program/code/command/information stored in the memory unit 130.
  • the control unit 120 transmits the information stored in the memory unit 130 to an external (eg, other communication device) through the communication unit 110 through a wireless/wired interface, or through the communication unit 110 to the outside (eg, Information received through a wireless/wired interface from another communication device) may be stored in the memory unit 130.
  • the specific operation process of the control unit 120 and the program/code/command/information stored in the memory unit 130 according to the present invention are at least one operation of the processors 102 and 202 of FIG. 18 and the memory 104 and 204. ) May correspond to at least one operation.
  • the additional element 140 may be variously configured according to the type of wireless device.
  • the additional element 140 may include at least one of a power unit/battery, an I/O unit, a driving unit, and a computing unit.
  • wireless devices include robots (Figs. 17, 100a), vehicles (Figs. 17, 100b-1, 100b-2), XR devices (Figs. 17, 100c), portable devices (Figs. (Figs. 17, 100e), IoT devices (Figs. 17, 100f), digital broadcasting terminals, hologram devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate/environment devices, It may be implemented in the form of an AI server/device (FIGS. 17 and 400), a base station (FIGS. 17 and 200), and a network node.
  • the wireless device can be used in a mobile or fixed location depending on the use-example/service.
  • various elements, components, units/units, and/or modules in the wireless devices 100 and 200 may be connected to each other through a wired interface, or at least part of them may be wirelessly connected through the communication unit 110.
  • the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (eg, 130, 140) are connected through the communication unit 110.
  • the control unit 120 and the first unit eg, 130, 140
  • each element, component, unit/unit, and/or module in the wireless device 100 and 200 may further include one or more elements.
  • the controller 120 may be configured with one or more processor sets.
  • control unit 120 may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphic processing processor, and a memory control processor.
  • memory unit 130 includes random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and/or a combination thereof.
  • FIG. 19 An implementation example of FIG. 19 will be described in more detail with reference to the drawings.
  • Portable devices may include smart phones, smart pads, wearable devices (eg, smart watches, smart glasses), and portable computers (eg, notebook computers).
  • the portable device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).
  • MS mobile station
  • UT user terminal
  • MSS mobile subscriber station
  • SS subscriber station
  • AMS advanced mobile station
  • WT wireless terminal
  • the portable device 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and an input/output unit 140c. ) Can be included.
  • the antenna unit 108 may be configured as a part of the communication unit 110.
  • Blocks 110 to 130/140a to 140c correspond to blocks 110 to 130/140 of FIG. 19, respectively.
  • the communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations.
  • the controller 120 may perform various operations by controlling components of the portable device 100.
  • the controller 120 may include an application processor (AP).
  • the memory unit 130 may store data/parameters/programs/codes/commands required for driving the portable device 100. Also, the memory unit 130 may store input/output data/information, and the like.
  • the power supply unit 140a supplies power to the portable device 100 and may include a wired/wireless charging circuit, a battery, and the like.
  • the interface unit 140b may support connection between the portable device 100 and other external devices.
  • the interface unit 140b may include various ports (eg, audio input/output ports, video input/output ports) for connection with external devices.
  • the input/output unit 140c may receive or output image information/signal, audio information/signal, data, and/or information input from a user.
  • the input/output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.
  • the input/output unit 140c acquires information/signals (eg, touch, text, voice, image, video) input from the user, and the obtained information/signals are stored in the memory unit 130. Can be saved.
  • the communication unit 110 may convert information/signals stored in the memory into wireless signals, and may directly transmit the converted wireless signals to other wireless devices or to a base station.
  • the communication unit 110 may restore the received radio signal to the original information/signal. After the restored information/signal is stored in the memory unit 130, it may be output in various forms (eg, text, voice, image, video, heptic) through the input/output unit 140c.
  • the vehicle or autonomous vehicle may be implemented as a mobile robot, a vehicle, a train, an aerial vehicle (AV), or a ship.
  • AV aerial vehicle
  • the vehicle or autonomous vehicle 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and autonomous driving. It may include a unit (140d).
  • the antenna unit 108 may be configured as a part of the communication unit 110.
  • Blocks 110/130/140a to 140d correspond to blocks 110/130/140 of FIG. 19, respectively.
  • the communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with external devices such as other vehicles, base stations (e.g. base stations, roadside base stations, etc.), and servers.
  • the controller 120 may perform various operations by controlling elements of the vehicle or the autonomous vehicle 100.
  • the control unit 120 may include an Electronic Control Unit (ECU).
  • the driving unit 140a may cause the vehicle or the autonomous vehicle 100 to travel on the ground.
  • the driving unit 140a may include an engine, a motor, a power train, a wheel, a brake, a steering device, and the like.
  • the power supply unit 140b supplies power to the vehicle or the autonomous vehicle 100, and may include a wired/wireless charging circuit, a battery, and the like.
  • the sensor unit 140c may obtain vehicle status, surrounding environment information, user information, and the like.
  • the sensor unit 140c is an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a position module, and a vehicle advancement. /Reverse sensor, battery sensor, fuel sensor, tire sensor, steering sensor, temperature sensor, humidity sensor, ultrasonic sensor, illumination sensor, pedal position sensor, etc. may be included.
  • the autonomous driving unit 140d is a technology for maintaining a driving lane, a technology for automatically adjusting the speed such as adaptive cruise control, a technology for automatically driving along a predetermined route, and for driving by automatically setting a route when a destination is set. Technology, etc. can be implemented.
  • the communication unit 110 may receive map data and traffic information data from an external server.
  • the autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data.
  • the controller 120 may control the driving unit 140a so that the vehicle or the autonomous driving vehicle 100 moves along the autonomous driving path according to the driving plan (eg, speed/direction adjustment).
  • the communication unit 110 asynchronously/periodically acquires the latest traffic information data from an external server, and may acquire surrounding traffic information data from surrounding vehicles.
  • the sensor unit 140c may acquire vehicle state and surrounding environment information.
  • the autonomous driving unit 140d may update the autonomous driving route and the driving plan based on newly acquired data/information.
  • the communication unit 110 may transmit information about a vehicle location, an autonomous driving route, and a driving plan to an external server.
  • the external server may predict traffic information data in advance using AI technology or the like based on information collected from the vehicle or autonomously driving vehicles, and may provide the predicted traffic information data to the vehicle or autonomously driving vehicles.
  • a location server 90 as shown in FIG. 22 may be included.
  • the location server 90 may be logically or physically connected to the wireless device 70 and/or the network node 80.
  • the wireless device 70 may be the first wireless device 100 of FIG. 18 and/or the wireless devices 100 and 200 of FIG. 19.
  • the network node 80 may be the second wireless device 100 of FIG. 18 and/or the wireless devices 100 and 200 of FIG. 19.
  • the location server 90 may be AMF, LMF, E-SMLC and/or SLP, but is not limited thereto, and may serve as the location server 90 in order to implement the embodiment of the present invention. If it is a communication device, any communication device may be utilized as the location server 90.
  • the name of the location server 90 is used for convenience of description, but may not be implemented in a server form, and may be implemented in a chip form, and such a chip form is implemented. May be implemented to perform all the functions of the location server 90 to be described later.
  • the location server 90 includes a transceiver 91 for communicating with one or more other wireless devices, network nodes, and/or other elements of the network.
  • the transceiver 91 may include one or more communication interfaces. It communicates with one or more other wireless devices, network nodes, and/or other elements of the network connected through the communication interface.
  • the location server 90 includes a processing chip 92.
  • the processing chip 92 may include at least one processor such as the processor 93 and at least one memory device such as the memory 94.
  • the processing chip 92 may control one or more processes in order to implement the methods described herein, and/or embodiments for a problem to be solved herein and a solution thereto.
  • the processing chip 92 may be configured to perform at least one or more embodiments described herein.
  • the processor 93 includes at least one processor for performing the function of the location server 90 described herein.
  • one or more processors may transmit and receive information by controlling one or more transceivers 91 of FIG. 22.
  • processing chip 92 includes a memory 94 configured to store data, programmable software code, and/or other information for performing the embodiments described herein.
  • the processor 93 when the memory 94 is executed by at least one processor such as the processor 93, the processor 93 is controlled by the processor 93 of FIG. It stores software code 95 including instructions for performing some or all of the processes to be performed, or for performing the embodiments described herein.
  • the wireless communication technology implemented in the wireless device of the present specification may include LTE, NR, and 6G, as well as NB-IoT (Narrowband Internet of Things) for low power communication.
  • the NB-IoT technology may be an example of a Low Power Wide Area Network (LPWAN) technology, and may be implemented in a standard such as LTE Cat (Category) NB1 and/or LTE Cat NB2. It is not limited.
  • the wireless communication technology implemented in the wireless device of the present specification may perform communication based on the LTE-M technology.
  • the LTE-M technology may be an example of an LPWAN technology, and may be referred to as various names such as eMTC (enhanced machine type communication).
  • LTE-M technology is 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-Bandwidth Limited (BL), 5) LTE-MTC, 6) LTE Machine Type Communication, and/or 7) may be implemented in at least one of various standards such as LTE M, and is not limited to the above name.
  • the wireless communication technology implemented in the wireless device of the present specification includes at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) considering low power communication. It can be, and is not limited to the above-described name.
  • ZigBee technology can generate personal area networks (PANs) related to small/low-power digital communication based on various standards such as IEEE 802.15.4, and may be called various names.
  • PANs personal area networks
  • a specific operation described as being performed by a base station in this document may be performed by its upper node in some cases. That is, it is obvious that various operations performed for communication with a terminal in a network comprising a plurality of network nodes including a base station may be performed by the base station or network nodes other than the base station.
  • the base station may be replaced by terms such as a fixed station, gNode B (gNB), Node B, eNode B (eNB), and access point.

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

Abstract

La présente invention concerne un procédé permettant d'émettre, au moyen d'un terminal, un signal de liaison montante dans un système de communication sans fil. En particulier, le procédé consiste à : recevoir des informations concernant une ressource RS de liaison descendante (DL) relative à l'émission d'un signal de référence de sondage (SRS) ; et sur la base du fait qu'une perte de trajet suivant les informations concernant la ressource RS de DL a été mesurée ou non, déterminer la puissance d'émission pour l'émission du SRS, la ressource RS de DL étant associée à une cellule voisine, sur la base du fait que la mesure de la perte de trajet suivant les informations concernant la ressource RS de DL a réussi, une valeur mesurée de la perte de trajet est utilisée pour déterminer la puissance d'émission, et sur la base du fait que la mesure de la perte de trajet suivant les informations concernant la ressource RS de DL a échoué, des informations relatives à la configuration de puissance acquise à partir d'une cellule de desserte peuvent être utilisées pour déterminer la puissance d'émission.
PCT/KR2020/010896 2019-08-16 2020-08-14 Procédé d'émission, au moyen d'un terminal, d'un signal de liaison montante dans un système de communication sans fil, et appareil associé Ceased WO2021034051A1 (fr)

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US201962887769P 2019-08-16 2019-08-16
US62/887,769 2019-08-16
US201962932574P 2019-11-08 2019-11-08
US62/932,574 2019-11-08

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