WO2020060355A1 - Procédé et dispositif de réduction de consommation d'énergie pendant la mesure dans un système de communication sans fil - Google Patents

Procédé et dispositif de réduction de consommation d'énergie pendant la mesure dans un système de communication sans fil Download PDF

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Publication number
WO2020060355A1
WO2020060355A1 PCT/KR2019/012334 KR2019012334W WO2020060355A1 WO 2020060355 A1 WO2020060355 A1 WO 2020060355A1 KR 2019012334 W KR2019012334 W KR 2019012334W WO 2020060355 A1 WO2020060355 A1 WO 2020060355A1
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WIPO (PCT)
Prior art keywords
measurement
wireless device
configuration
measurement configuration
network
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PCT/KR2019/012334
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English (en)
Korean (ko)
Inventor
이윤정
서인권
황대성
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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
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This specification relates to a method and apparatus for reducing power consumption when measuring in a wireless communication system.
  • 3GPP (3rd generation partnership project) long-term evolution (LTE) is a technology for enabling high-speed packet communication. Many methods have been proposed to reduce the cost of users and operators, which are LTE targets, improve service quality, expand coverage, and increase system capacity. 3GPP LTE is a high-level requirement that reduces cost per bit, improves service usability, flexible use of frequency bands, simple structure, open interface and proper power consumption of terminals.
  • NR radio access technology
  • ITU international telecommunication union
  • 3GPP identifies the technical components needed to successfully standardize NR in a timely manner that meets both the urgent market demands and the longer-term requirements presented by the ITU radio communication sector (ITU-R) international mobile telecommunications (IMT) -2020 process. And develop.
  • ITU-R ITU radio communication sector
  • IMT international mobile telecommunications
  • the NR should be able to use any spectrum band up to at least 100 GHz that can be used for wireless communication in the distant future.
  • NR targets a single technology framework covering all deployment scenarios, usage scenarios, and requirements, including enhanced mobile broadband (eMBB), massive machine-type-communications (mMTC), and ultra-reliable and low latency communications (URLLC). Is done. NR must be inherently forward compatible.
  • eMBB enhanced mobile broadband
  • mMTC massive machine-type-communications
  • URLLC ultra-reliable and low latency communications
  • a method performed by a wireless device includes receiving a plurality of measurement configurations from a network and applying any one of the plurality of measurement configurations based on a measurement state of the wireless device.
  • an apparatus eg, wireless device
  • implementing the above-described method is provided.
  • power consumption of the wireless device may be reduced during measurement.
  • FIG. 1 shows an example of a communication system to which the technical features of the present specification can be applied.
  • FIG. 2 shows an example of a wireless device to which the technical features of the present specification can be applied.
  • FIG. 3 shows an example of a signal processing circuit for a transmission signal to which the technical features of the present specification can be applied.
  • FIG. 4 shows another example of a wireless device to which the technical features of the present specification can be applied.
  • FIG 5 shows an example of a portable device to which the technical features of the present specification can be applied.
  • FIG. 6 shows an example of a wireless communication system to which the technical features of the present specification can be applied.
  • FIG. 7 shows another example of a wireless communication system to which the technical features of the present specification can be applied.
  • FIG 8 shows an example of a frame structure to which the technical features of the present specification can be applied.
  • FIG 9 shows another example of a frame structure to which the technical features of the present specification can be applied.
  • FIG. 10 shows an example of a subframe structure to which the technical features of the present specification can be applied.
  • FIG. 11 shows an example of a resource grid to which the technical features of the present specification can be applied.
  • FIG. 12 shows an example of a synchronization channel to which the technical features of the present specification can be applied.
  • FIG 13 shows an example of a frequency allocation method to which the technical features of the present specification can be applied.
  • FIG. 17 shows an example of a threshold value of an SS / PBCH block for RACH resource association to which the technical features of the present specification can be applied.
  • FIG. 19 shows an example of a UE RRC state machine and state transition in an NR to which the technical features of the present specification can be applied.
  • FIG. 20 shows an example of a UE state machine and state transition to which the technical features of the present specification can be applied, and a mobility procedure supported between NR / NGC and E-UTRAN / EPC.
  • FIG. 21 shows an example of a DRX cycle to which the technical features of the present specification can be applied.
  • FIG. 22 shows an example of a method of receiving a plurality of measurements according to an embodiment of the present specification.
  • FIG. 23 shows an example of performing a measurement based on an SS / PBCH block and reporting a measurement result according to an SMTC configuration according to an embodiment of the present specification.
  • FIG. 24 shows an example of performing measurement based on CSI-RS and reporting the measurement result according to the CMTC configuration according to an embodiment of the present specification.
  • 25 illustrates an example in which a UE selects / determines at least one measurement configuration among a plurality of measurement configurations according to an embodiment of the present specification, performs measurement based on only the selected measurement configuration, and reports measurement results.
  • 26 illustrates an example in which the network selects / determines at least one measurement configuration among a plurality of measurement configurations, and the UE performs measurement based on only the selected measurement configuration and reports the measurement result.
  • the network selects / determines at least one measurement configuration among a plurality of measurement configurations, and the UE performs measurement based on only the selected measurement configuration and reports the measurement result.
  • communication standards by 3GPP standardization organizations include long term evolution (LTE) and / or evolution of LTE systems.
  • LTE long term evolution
  • Evolution of the LTE system includes LTE-A (advanced), LTE-A Pro, and / or 5G new radio (NR).
  • the communication standard by the IEEE standardization organization includes a wireless local area network (WLAN) system such as IEEE 802.11a / b / g / n / ac / ax.
  • WLAN wireless local area network
  • the above-described system provides various multiple access technologies such as orthogonal frequency division multiple access (OFDMA), and / or single carrier frequency division multiple access (SC-FDMA) downlink (DL) and / or uplink (UL). ).
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • DL downlink
  • UL uplink
  • OFDMA and SC-FDMA may be mixed for DL and / or UL.
  • a / B may mean “A and / or B”.
  • A, B may mean “A and / or B”.
  • a / B / C may mean “at least one of A, B, and / or C”.
  • A, B, and C may mean “at least one of A, B, and / or C”.
  • the term “or” should be interpreted to indicate “and / or”.
  • the expression “A or B” may include 1) only A, 2) only B, and / or 3) both A and B. That is, in this specification, the expression “or” should be interpreted to indicate "additionally or alternatively.”
  • FIG. 1 shows an example of a communication system to which the technical features of the present specification can be applied.
  • a communication system 1 to which the technical features of the present specification can be applied includes a wireless device, a base station, and a network.
  • the wireless device means a device that performs communication using a wireless access technology (eg, 5G New Radio Access Technology (NR), long term evolution (LTE)), and will be referred to as a communication / wireless / 5G device.
  • NR 5G New Radio Access Technology
  • LTE long term evolution
  • the wireless device includes a robot 100a, a vehicle 100b-1, 100b-2, an XR (extended reality) device 100c, a hand-held device 100d, and a home appliance 100e. ), An Internet of Things (IoT) device 100f, and an Artificial Intelligence (AI) device / server 400.
  • IoT Internet of Things
  • AI Artificial Intelligence
  • the vehicle may include a vehicle equipped with a wireless communication function, an autonomous driving vehicle, a vehicle capable of performing inter-vehicle communication, and the like.
  • the vehicle may include an unmanned aerial vehicle (UAV) (eg, a drone).
  • UAV unmanned aerial vehicle
  • the XR device may include an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device.
  • XR devices are implemented in the form of head-mounted devices (HMDs), head-up displays (HUDs) installed in vehicles, TVs, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, and robots. Can be.
  • the portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), a computer (eg, a notebook, etc.).
  • Household appliances may include a TV, a refrigerator, and a washing machine.
  • IoT devices may include sensors, smart meters, and the like.
  • base stations and networks may also be implemented as wireless devices.
  • the specific wireless device 200a may operate as a base station / network node to other wireless devices.
  • the wireless devices 100a to 100f may be connected to the network 300 through the base station 200.
  • AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI server 400 through the network 300.
  • 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 also directly communicate (eg, sidelink communication) without passing through the base station / network.
  • the vehicles 100b-1 and 100b-2 may perform direct communication (eg, vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication).
  • 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 between the wireless devices 100a to 100f and the base station 200 and / or between the base station 200 and the base station 200 may be achieved.
  • the wireless communication / connection is uplink / downlink communication (150a), sidelink communication (150b) (or D2D (device-to-device) communication), communication between base stations 150c (for example, relay, IAB
  • It can be achieved through various radio access technologies (eg, 5G NR), such as (integrated access and backhaul) Wireless devices and base stations / wireless devices, base stations and base stations via wireless communication / connections (150a, 150b, 150c)
  • various signal processing processes for example, channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.
  • resource allocation process etc. At least some may be performed.
  • FIG. 2 shows an example of a wireless device to which the technical features of the present specification can be applied.
  • 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 ⁇ wireless device 100x, base station 200 ⁇ and / or ⁇ wireless device 100x), wireless device 100x in FIG. 1 ⁇ .
  • the first wireless device 100 may include one or more processors 102 and one or more memories 104.
  • the first wireless device 100 may further include one or more transceivers 106 and / or one or more antennas 108.
  • the processor 102 can control the memory 104 and / or the transceiver 106.
  • the processor 102 may be configured to implement the description, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. For example, the processor 102 may process information in the memory 104 to generate the first information / signal, and then transmit the wireless signal including the first information / signal through the transceiver 106.
  • the processor 102 may receive the wireless signal including the second information / signal through the transceiver 106 and store the information obtained from the signal processing of the second information / signal in the memory 104.
  • the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102.
  • memory 104 may execute instructions to perform some or all of the processes controlled by processor 102, or to perform the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. You can save the included software code.
  • 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 can be coupled to the processor 102 and can transmit and / or receive wireless signals through one or more antennas 108.
  • the transceiver 106 may include a transmitter and / or receiver.
  • the transceiver 106 may be mixed with a radio frequency (RF) unit.
  • RF radio frequency
  • the wireless device may mean a communication modem / circuit / chip.
  • the second wireless device 200 may include one or more processors 202 and one or more memories 204.
  • the second wireless device 200 may further include one or more transceivers 206 and / or one or more antennas 208.
  • the processor 202 can control the memory 204 and / or the transceiver 206.
  • the processor 202 may be configured to implement the description, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. For example, the processor 202 may process information in the memory 204 to generate third information / signal, and then transmit a wireless signal including the third information / signal through the transceiver 206.
  • the processor 202 may receive the wireless signal including the fourth information / signal through the transceiver 206 and store the information obtained from the signal processing of the fourth information / signal in the memory 204.
  • the memory 204 may be connected to the processor 202, and may store various information related to the operation of the processor 202. For example, memory 204 may execute instructions to perform some or all of the processes controlled by processor 202, or to perform the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. You can save the included software code.
  • the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement wireless communication technology (eg, LTE, NR).
  • the transceiver 206 can be coupled to the processor 202 and can transmit and / or receive wireless signals through one or more antennas 208.
  • the transceiver 206 may include a transmitter and / or receiver.
  • the transceiver 206 can be mixed with the RF unit.
  • the wireless device may mean a communication modem / circuit / chip.
  • one or more protocol layers may be implemented by one or more processors 102 and 202.
  • one or more processors 102, 202 may include one or more layers (e.g., physical (PHY), media access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), RRC ( A functional layer such as radio resource control (SDAP) and service data adaptation protocol (SDAP) can be implemented.
  • the one or more processors 102, 202 generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. can do.
  • PDUs protocol data units
  • SDUs service data units
  • the one or more processors 102, 202 may generate messages, control information, data or information according to the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein.
  • the one or more processors 102, 202 may include signals (e.g., PDUs, SDUs, messages, control information, data or information) in accordance with the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein.
  • Baseband signals to one or more transceivers 106, 206.
  • One or more processors 102, 202 may receive signals (eg, baseband signals) from one or more transceivers 106, 206, and the descriptions, functions, procedures, suggestions, methods and / or PDUs, SDUs, messages, control information, data or information may be obtained according to an operation flowchart.
  • signals eg, baseband signals
  • the one or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor and / or microcomputer.
  • the one or more processors 102, 202 may be implemented by hardware, firmware, software, and / or combinations thereof.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gates
  • the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein may be implemented using firmware and / or software, and firmware and / or software may be implemented to include modules, procedures, functions, and the like. have.
  • Firmware or software set to perform the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein may be included in one or more processors 102, 202 or stored in one or more memories 104, 204. It can be driven by the above processors (102, 202).
  • the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein may be implemented using firmware or software in the form of code, instructions and / or instruction sets.
  • One or more memories 104, 204 may be coupled to one or more processors 102, 202, and may store various types of data, signals, messages, information, programs, codes, instructions, and / or instructions.
  • the one or more memories 104, 204 may include read-only memory (ROM), random access memory (RAM), erasable programmable ROM (EPROM), flash memory, hard drives, registers, cache memory, computer readable storage media and / or these It can be composed of a combination of.
  • the one or more memories 104, 204 may be located inside and / or outside of the one or more processors 102, 202. Also, the one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 through various technologies such as a wired or wireless connection.
  • the one or more transceivers 106, 206 may transmit user data, control information, radio signals / channels, etc., referred to in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein to one or more other devices. .
  • the one or more transceivers 106, 206 may receive user data, control information, radio signals / channels, and the like referred to in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein from one or more other devices. have.
  • one or more transceivers 106, 206 may be coupled to one or more processors 102, 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, radio signals / channels, etc. to one or more other devices. Further, the one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, radio signals / channels, etc. from one or more other devices. Additionally, one or more transceivers 106, 206 may be coupled to one or more antennas 108, 208.
  • the one or more transceivers 106, 206 are user data, control information, radio signals / channels referred to in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein via one or more antennas 108, 208 And the like.
  • the one or more antennas 108 and 208 may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
  • the one or more transceivers 106 and 206 receive user data, control information, and radio signals / channels to process received user data, control information, radio signals / channels, and the like using one or more processors 102 and 202. The back can be converted from an RF band signal to a baseband signal.
  • the one or more transceivers 106 and 206 may convert user data, control information, and radio signals / channels processed using one or more processors 102 and 202 from a baseband signal to an RF band signal.
  • the one or more transceivers 106, 206 may include (analog) oscillators and / or filters.
  • FIG. 3 shows an example of a signal processing circuit for a transmission signal to which the technical features of the present specification can be applied.
  • the signal processing circuit 1000 includes a scrambler 1010, a modulator 1020, a layer mapper 1030, a precoder 1040, a resource mapper 1050, and a signal generator 1060.
  • the operations / functions of FIG. 3 may be performed in the processors 102, 202 and / or transceivers 106, 206 of FIG.
  • the hardware elements of FIG. 3 can be implemented in the processors 102, 202 and / or transceivers 106, 206 of FIG. 2.
  • blocks 1010 to 1060 may be implemented in processors 102 and 202 of FIG. 2.
  • blocks 1010 to 1050 may be implemented in the processors 102 and 202 of FIG. 2
  • block 1060 may be implemented in the transceivers 106 and 206 of FIG. 2.
  • the codeword may be converted into a wireless signal through the signal processing circuit 1000 of FIG. 3.
  • the codeword is an encoded bit sequence of an information block.
  • the information block may include a transport block (eg, an uplink shared channel (UL-SCH) transport block and a downlink shared channel (DL-SCH) transport block).
  • the wireless signal may be transmitted through various physical channels (eg, physical uplink shared channel (PUSCH), physical downlink shared channel (PDSCH)).
  • PUSCH physical uplink shared channel
  • PDSCH physical downlink shared channel
  • the codeword may be converted into a scrambled bit sequence by the scrambler 1010.
  • the scrambled bit sequence used for scramble may be generated based on the initialization value, and the initialization value may include ID information of the wireless device.
  • the scrambled bit sequence can be modulated into a modulated symbol sequence by the modulator 1020.
  • the modulation scheme may include pi / 2-binary phase shift keying (pi / 2-BPSK), m-phase shift keying (m-PSK), m-quadrature amplitude modulation (m-QAM), and the like.
  • the complex modulation symbol sequence may be mapped to one or more transport layers by the layer mapper 1030.
  • the modulation symbols of each transport layer may be mapped to the corresponding antenna port (s) by the precoder 1040 (precoding).
  • the output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 by the precoding matrix W of N * M.
  • N is the number of antenna ports and M is the number of transport layers.
  • the precoder 1040 can perform precoding after performing transform precoding (eg, a discrete Fourier transform (DFT)) for complex modulation symbols. Further, the precoder 1040 may perform precoding without performing conversion precoding.
  • transform precoding eg, a discrete Fourier transform (DFT)
  • the resource mapper 1050 may map modulation symbols of each antenna port to time-frequency resources.
  • the time-frequency resource includes a plurality of symbols in the time domain (eg, a cyclic prefix based OFDMA (CP-OFDMA) symbol, a DFT spread OFDMA (DFT-s-OFDMA) symbol), and a plurality of subcarriers in the frequency domain. It can contain.
  • the signal generator 1060 generates a radio signal from the mapped modulation symbols, and the generated radio signal can be transmitted to other devices through each antenna.
  • the signal generator 1060 may include an inverse fast Fourier transform (IFFT) module and a CP inserter, a digital-to-analog converter (DAC), and a frequency uplink converter.
  • IFFT inverse fast Fourier transform
  • DAC digital-to-analog converter
  • the signal processing process for the received signal in the wireless device may be configured as the inverse of the signal processing processes 1010 to 1060 of FIG. 3.
  • a wireless device eg, 100 and 200 in FIG. 2 may receive a wireless signal from the outside through an antenna port / transceiver.
  • the received radio signal may be converted into a baseband signal through a signal restorer.
  • the signal recoverer may include a frequency downlink converter (ADC), an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module.
  • ADC frequency downlink converter
  • ADC analog-to-digital converter
  • CP remover CP remover
  • FFT fast Fourier transform
  • the baseband signal may be restored to a codeword through a resource demapping process, a postcoding process, a demodulation process, and a descrambling process.
  • the signal processing circuit for the received signal may include a signal restorer, a resource demapper, a post coder, a demodulator, a descrambler, and a decoder.
  • FIG. 4 shows another example of a wireless device to which the technical features of the present specification can be applied.
  • the wireless device may be implemented in various forms according to use-example / service (see FIG. 1).
  • the wireless devices 100 and 200 may correspond to the wireless devices 100 and 200 of FIG. 2 and may be composed of various elements, components, units / parts, and / or modules.
  • the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and additional elements 140.
  • the communication unit may include a communication circuit 112 and a transceiver (s) 114.
  • communication circuit 112 may include one or more processors 102, 202 and / or one or more memories 104, 204 of FIG.
  • the transceiver (s) 114 may include one or more transceivers 106, 206 and / or one or more antennas 108, 208 of FIG. 2.
  • the control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140, and controls the overall operation of the wireless devices 100 and 200.
  • the controller 120 may control the electrical / mechanical operation of the wireless devices 100 and 200 based on the program / code / command / information stored in the memory unit 130.
  • control unit 120 transmits information stored in the memory unit 130 to the outside (for example, another communication device) through the wireless / wired interface through the communication unit 110, or through the communication unit 110 to the external ( For example, information received through a wireless / wired interface from another communication device) may be stored in the memory unit 130.
  • the additional element 140 may be variously configured according to the type of the wireless devices 100 and 200.
  • the additional element 140 may include at least one of a power unit / battery, an input / output (I / O) unit, a driving unit, and a computing unit.
  • the wireless devices 100 and 200 include robots (FIGS. 1 and 100A), vehicles (FIGS. 11, 100b-1, and 100b-2), XR devices (FIGS. 1 and 100c), and portable devices (FIG. 1). , 100d), home appliances (Figs. 1, 100e), IoT devices (Figs.
  • the wireless device may be movable or used in a fixed place depending on the use-example / service.
  • various elements, components, units / parts, and / or modules in the wireless devices 100 and 200 may be connected to each other through a wired interface, or at least a portion 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 the communication unit 110. It can be connected wirelessly.
  • each element, component, unit / unit, and / or module in the wireless devices 100 and 200 may further include one or more elements.
  • the controller 120 may be composed of one or more processor sets.
  • control unit 120 may be configured as a set of a communication control processor, an application processor (AP), an electronic control unit (ECU), a graphic processing processor, or a memory control processor.
  • memory unit 130 may include RAM, dynamic RAM (DRAM), ROM, flash memory, volatile memory, non-volatile memory, and / or combinations thereof.
  • FIG 5 shows an example of a portable device to which the technical features of the present specification can be applied.
  • the portable device 100 may include a smart phone, a smart pad, a wearable device (eg, a smart watch, a smart glass), and a portable computer (eg, a notebook, etc.).
  • the mobile device 100 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 mobile 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. ).
  • the antenna unit 108 may be configured as a part of the communication unit 110.
  • Blocks 110 to 130 / 140a to 140c may respectively correspond to blocks 110 to 130/140 in FIG. 4.
  • 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 various components of the mobile device 100.
  • the controller 120 may include an AP.
  • the memory unit 130 may store data / parameters / programs / codes / instructions required for driving the portable device 100. Also, the memory unit 130 may store input / output data / information.
  • 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 the connection between the mobile device 100 and other external devices.
  • the interface unit 140b may include various ports (eg, audio input / output ports and 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 / signal (eg, touch, text, voice, image, video) input from a user, and the obtained information / signal is the memory unit 130 ).
  • the communication unit 110 may convert information / signals stored in the memory into wireless signals, and transmit the converted wireless signals directly to other wireless devices or to a base station.
  • the communication unit 110 may restore the received radio signal to original information / signal.
  • the restored information / signal may be stored in the memory unit 130 and then output in various forms (eg, text, voice, image, video, haptic) through the input / output unit 140c.
  • FIG. 6 shows an example of a wireless communication system to which the technical features of the present specification can be applied.
  • FIG. 6 is a system architecture based on an evolved-universal terrestrial radio access network (E-UTRAN).
  • E-UTRAN evolved-universal terrestrial radio access network
  • LTE is a part of E-UMTS (evolved-UMTS) using E-UTRAN.
  • a wireless communication system includes one or more user equipment (UE) 100, E-UTRAN, and evolved packet core (EPC).
  • UE 100 refers to a communication device carried by a user.
  • the UE 10 may be fixed or mobile, and may be referred to as other terms such as MS, UT, SS, and wireless devices.
  • the UE 100 may correspond to the wireless device 100x of FIG. 1, the first wireless device 100 of FIG. 2, the wireless device 100 of FIG. 4, or the portable device 100 of FIG. 5.
  • E-UTRAN is composed of one or more eNB (eNodeB; 200).
  • the eNB 200 provides termination of the E-UTRA user plane and control plane protocols towards the UE 10.
  • BS 20 generally refers to a fixed point in communication with UE 100.
  • the eNB 200 performs functions such as inter-cell radio resource management (RRM), radio bearer (RB) control, access mobility control, radio admission control, measurement configuration / provision, dynamic resource allocation (scheduler), and the like.
  • RRM inter-cell radio resource management
  • RB radio bearer
  • the BS 20 may be referred to as other terms such as a base station (BS), a base transceiver system (BTS), and an access point.
  • the eNB 200 may correspond to the base station 200 of FIG. 1, the second wireless device 200 of FIG. 2, or the wireless device 200 of FIG. 4.
  • Downlink (DL) indicates communication from the eNB 200 to the UE 100.
  • Uplink (UL) indicates communication from the UE 100 to the eNB 200.
  • the sidelink (SL) indicates communication between the UEs 100.
  • the transmitter can be part of the eNB 200, and the receiver can be part of the eNB 100.
  • the transmitter can be part of the UE 100 and the receiver can be part of the eNB 200.
  • the transmitter and receiver can be part of the UE 100.
  • EPC includes a mobility management entity (MME), a serving gateway (S-GW) and a packet data network (PDN) gateway (P-GW).
  • MME mobility management entity
  • S-GW serving gateway
  • PDN packet data network gateway
  • the MME hosts functions such as non-access stratum (NAS) security, idle state mobility processing, and evolved packet system (EPS) bearer control.
  • S-GW hosts functions such as mobility anchoring.
  • S-GW is a gateway with E-UTRAN as an end point.
  • MME / S-GW 30 will be referred to simply as "gateway," but it is understood that this entity includes both MME and S-GW.
  • the P-GW hosts functions such as UE IP (Internet protocol) address allocation and packet filtering.
  • P-GW is a gateway that has a PDN as an endpoint.
  • the P-GW is connected to an external network.
  • the MME / S-GW 300 may correspond to the network 300 of FIG. 1.
  • the UE 100 is connected to the eNB 200 by the Uu interface.
  • the UE 100 is interconnected with each other by a PC5 interface.
  • the eNBs 200 are interconnected with each other by an X2 interface.
  • the eNB 200 is also connected to the EPC through the S1 interface. More specifically, it is connected to the MME by the S1-MME interface and the S-GW by the S1-U interface.
  • the S1 interface supports a many-to-many relationship between MME / S-GW and BS.
  • FIG. 7 shows another example of a wireless communication system to which the technical features of the present specification can be applied.
  • FIG. 7 shows a system architecture based on a 5G NR system.
  • the entity used in the 5G NR system (hereinafter simply referred to as “NR”) may absorb some or all functions of the entity introduced in FIG. 6 (eg, eNB, MME, S-GW).
  • the entity used in the NR system can be identified by the name "NG" to distinguish it from LTE.
  • the wireless communication system includes one or more UEs 100, a next-generation RAN (NG-RAN), and a 5G core network (5GC).
  • the NG-RAN is composed of at least one NG-RAN node.
  • the NG-RAN node is an entity corresponding to the eNB 200 shown in FIG. 6.
  • the NG-RAN node is composed of at least one gNB 200 and / or at least one ng-eNB 200.
  • the gNB 200 provides termination of the NR user plane and control plane protocol towards the UE 100.
  • Ng-eNB 200 provides termination of the E-UTRA user plane and control plane protocol towards UE 100.
  • the gNB 200 and / or the ng-eNB 200 may correspond to the base station 200 of FIG. 1, the second wireless device 200 of FIG. 2, or the wireless device 200 of FIG. 4.
  • 5GC includes access and mobility management function (AMF), user plane function (UPF) and session management function (SMF).
  • AMF hosts functions such as NAS security and idle state mobility processing.
  • AMF is an entity that includes the functions of a conventional MME.
  • UPF hosts functions such as mobility anchoring and protocol data unit (PDU) processing.
  • PDU protocol data unit
  • UPF is an entity that includes the functions of a conventional S-GW.
  • the SMF hosts functions such as UE IP address allocation and PDU session control.
  • the gNB 200 and the ng-eNB 200 are interconnected through an Xn interface.
  • the gNB 200 and ng-eNB 200 are also connected to 5GC through the NG interface. More specifically, it is connected to AMF through the NG-C interface and UPF through the NG-U interface.
  • one radio frame is composed of 10 subframes, and one subframe is composed of 2 slots.
  • the length of one subframe may be 1 ms, and the length of one slot may be 0.5 ms.
  • the time to transmit one transport block from the upper layer to the physical layer is defined as a transmission time interval (TTI).
  • TTI may be a minimum unit of scheduling.
  • DL and UL transmission in NR is performed through a radio frame having a duration of 10 ms.
  • Each radio frame includes 10 subframes. Therefore, one subframe corresponds to 1 ms.
  • Each radio frame is divided into two half-frames.
  • NR supports various neuralities
  • the structure of a radio frame may be varied.
  • NR supports several subcarrier spacings in the frequency domain.
  • Table 1 shows the different neuralisms supported by NR. Each neurology can be identified by the index ⁇ .
  • the subcarrier interval may be set to one of 15, 30, 60, 120 and 240 kHz identified by the index ⁇ .
  • transmission of user data (eg, PUSCH, PDSCH) according to subcarrier intervals may not be supported. That is, transmission of user data may not be supported only at least one specific subcarrier interval (for example, 240 kHz).
  • a synchronization channel may not be supported according to a subcarrier interval. It may not be supported only at a specific subcarrier spacing (eg, 60 kHz).
  • the number of slots and the number of symbols included in one radio frame / subframe may be different according to various neuralisms, that is, various subcarrier intervals.
  • Table 2 shows the number of OFDM symbols per slot (N symb slot ), the number of slots per radio frame (N symb frame, ⁇ ), and the number of slots per subframe (N symb subframe, ⁇ ) for each neuralology in the general CP. ).
  • N symb slot Number of OFDM symbols per slot
  • N symb frame Number of slots per radio frame
  • Table 3 shows the number of OFDM symbols per slot (N symb slot ), the number of slots per radio frame (N symb frame, ⁇ ), and the number of slots per subframe (N in the extended prefix (CP))
  • N symb subframe N in the extended prefix (CP)
  • N symb slot Number of OFDM symbols per slot
  • N symb frame Number of slots per radio frame
  • N symb frame, ⁇ Number of slots per subframe (N symb subframe, ⁇ ) 2 12 40 4
  • symbols represent signals transmitted during a specific time interval.
  • the symbol may represent a signal generated by OFDM processing. That is, in this specification, the symbol may refer to an OFDM / OFDMA symbol or an SC-FDMA symbol.
  • CP may be located between each symbol.
  • FIG. 8 shows an example of a frame structure to which the technical features of the present specification can be applied.
  • 9 shows another example of a frame structure to which the technical features of the present specification can be applied.
  • a frequency division duplex (FDD) and / or time division duplex (TDD) may be applied to a wireless communication system to which an embodiment of the present specification is applied.
  • FDD frequency division duplex
  • TDD time division duplex
  • LTE / LTE-A UL subframes and DL subframes are allocated in units of subframes.
  • a symbol in a slot can be classified into a DL symbol (denoted by D), a flexible symbol (denoted by X), and a UL symbol (denoted by U).
  • the UE assumes that DL transmission occurs only in DL symbols or floating symbols.
  • the UE should transmit only the UL symbol or the floating symbol.
  • the floating symbol may be called other terms such as a reserved symbol, another symbol, and an unknown symbol.
  • Table 4 shows an example of the slot format identified by the corresponding format index.
  • the contents of Table 4 may be applied to a specific cell in common or to a neighboring cell in common, or may be applied to each UE individually or differently.
  • Table 4 shows only a part of the slot formats actually defined in the NR. Specific allocation methods may be changed or added.
  • the UE may receive a slot format configuration through higher layer signaling (ie, RRC signaling). Alternatively, the UE may receive a slot format configuration through downlink control information (DCI) received through the PDCCH. Or, the UE may receive a slot format configuration through a combination of higher layer signaling and DCI.
  • higher layer signaling ie, RRC signaling
  • DCI downlink control information
  • the UE may receive a slot format configuration through a combination of higher layer signaling and DCI.
  • FIG. 10 shows an example of a subframe structure to which the technical features of the present specification can be applied.
  • the frame structure of FIG. 10 may be used to minimize data transmission latency when TDD is used in NR.
  • the frame structure of FIG. 10 is called a self-contained subframe structure.
  • the hatched area indicates the DL control area
  • the black part indicates the UL control area.
  • the unmarked area may be used for DL data transmission or UL data transmission.
  • the characteristics of this structure can be sequentially performed in the DL transmission and the UL transmission in one subframe, thus, the UE receives the DL data in the subframe, and UL acknowledgment (ACK) / non-acknowledgement (NACK) Can transmit.
  • ACK acknowledgment
  • NACK non-acknowledgement
  • a time gap is required when the base station and the UE switch from a transmission mode to a reception mode or a reception mode to a transmission mode.
  • some symbols at a time point of switching from DL to UL may be set as a guard period (GP).
  • FIG. 11 shows an example of a resource grid to which the technical features of the present specification can be applied.
  • the example shown in FIG. 11 is a time-frequency resource grid used in NR.
  • the example shown in FIG. 11 can be applied to UL and / or DL.
  • multiple slots are included in one subframe on the time domain.
  • a "14 * 2 ⁇ ” symbol can be expressed in the resource grid.
  • one resource block (RB) may occupy 12 consecutive subcarriers.
  • One RB may be referred to as a physical resource block (PRB), and 12 resource elements (REs) may be included in each PRB.
  • the number of assignable RBs can be determined based on the minimum and maximum values.
  • the number of RBs that can be allocated may be individually configured according to a neurology (“ ⁇ ”).
  • the number of assignable RBs may be configured with the same value for UL and DL, or may be configured with different values for UL and DL.
  • the UE may perform cell search to acquire time and / or frequency synchronization with a cell and to acquire a cell ID (identifier).
  • Synchronization channels such as PSS, SSS and PBCH can be used for cell search.
  • FIG. 12 shows an example of a synchronization channel to which the technical features of the present specification can be applied.
  • PSS and SSS may include one symbol and 127 subcarriers.
  • the PBCH may include 3 symbols and 240 subcarriers.
  • the PSS is used to acquire SS / PBCH block (synchronization signal / PBCH block) symbol timing.
  • the PSS indicates three hypotheses for cell ID identification.
  • SSS is used for cell ID identification.
  • the SSS indicates 336 hypotheses.
  • 1008 physical layer cell IDs can be configured by PSS and SSS.
  • the SS / PBCH block may be repeatedly transmitted according to a predetermined pattern in a 5 ms window. For example, when L SS / PBCH blocks are transmitted, all of SS / PBCH blocks # 1 to SS / PBCH block #L may include the same information, but may be transmitted through beams of different directions. That is, a QCL (quasi co-location) relationship may not be applied to an SS / PBCH block within a 5 ms window.
  • the beam used to receive the SS / PBCH block can be used for subsequent operations (eg, random access operations) between the UE and the network.
  • the SS / PBCH block may be repeated by a specific period. The repetition period may be individually configured according to the neurology.
  • the PBCH has a bandwidth of 20 RBs for the second symbol / fourth symbol and 8 RBs for the third symbol.
  • the PBCH includes a demodulation reference signal (DM-RS) for decoding the PBCH.
  • DM-RS demodulation reference signal
  • the frequency domain for DM-RS is determined according to the cell ID.
  • a special DM-RS ie, PBCH-DMRS
  • the SS / PBCH block may include information indicating an index.
  • the PBCH performs various functions.
  • the PBCH may perform a function of broadcasting a master information block (MIB).
  • MIB master information block
  • SI System information
  • SIB1 system information block type-1
  • RMSI maintenance minimum SI
  • the MIB contains information necessary for decoding SIB1.
  • MIB is information about subcarrier spacing applied to SIB1 (and MSG 2/4, other SI used in random access procedure), information about frequency offset between SS / PBCH block and subsequently transmitted RB, PDCCH. It may include information about the bandwidth of / SIB, information for decoding the PDCCH (for example, information on a search space to be described later / control resource set (CORESET) / DM-RS, etc.).
  • MIB may be periodically transmitted, and the same information may be repeatedly transmitted during a time interval of 80 ms.
  • SIB1 may be repeatedly transmitted through the PDSCH.
  • SIB1 includes control information for initial access of the UE and information for decoding other SIBs.
  • the search space for the PDCCH corresponds to a set of control channel candidates through which the UE performs blind decoding.
  • the search space for the PDCCH is divided into common search space (CSS) and UE-specific search space (USS).
  • SCS common search space
  • USS UE-specific search space
  • the size of each search space and / or the size of a control channel element (CCE) included in the PDCCH is determined according to the PDCCH format.
  • a resource element group (REG) and a CCE for PDCCH are defined.
  • the concept of CORESET is defined.
  • one REG corresponds to 12 REs, that is, one RB transmitted through one OFDM symbol.
  • Each REG includes DM-RS.
  • One CCE includes a plurality of REGs (eg, 6 REGs).
  • the PDCCH may be transmitted through resources composed of 1, 2, 4, 8 or 16 CCEs. The number of CCEs may be determined according to an aggregation level.
  • 1 CCE when the aggregation level is 1, 2 CCE when the aggregation level is 2, 4 CCE when the aggregation level is 4, 8 CCE when the aggregation level is 8, and 16 CCE when the aggregation level is 16. It may be included in the PDCCH for the UE.
  • CORESET is a set of resources for transmission of control signals.
  • CORESET can be defined in 1/2/3 OFDM symbols and multiple RBs.
  • the number of symbols used for PDCCH is defined by a physical control format indicator channel (PCFICH).
  • PCFICH is not used in NR.
  • the number of symbols used for CORESET may be defined by an RRC message (and / or PBCH / SIB1).
  • the frequency domain of CORESET may be defined by an RRC message (and / or PBCH / SIB1) in units of RB.
  • the base station may transmit information about CORESET to the UE. For example, information about a CORESET configuration may be transmitted for each CORESET.
  • information about a CORESET configuration may be transmitted for each CORESET.
  • the time duration for example, 1/2/3 symbol, etc.
  • frequency domain resource for example, RB set
  • REG-to-CCE mapping type For example, interleaving
  • precoding granularity For example, REG bundling size (when REG-to-CCE mapping type is interleaving), interleaver size (when REG-to-CCE mapping type is interleaving)
  • At least one of may be transmitted.
  • bundling of 2 or 6 REGs may be performed.
  • Bundling of 2 or 6 REGs may be performed on 2 symbol-CORESET, and time-first mapping may be applied.
  • the bundling of 3 or 6 REGs may be performed on the 3 symbol-CORESET, and a time-first mapping may be applied.
  • REG bundling is performed, the UE may assume the same precoding for the corresponding bundling unit.
  • the search space of the PDCCH is divided into CSS and USS.
  • the search space can be set on CORESET.
  • one search space may be defined in one CORESET.
  • CORESET for CSS and CORESET for USS can be configured respectively.
  • a plurality of search spaces may be defined in one CORESET. That is, CSS and USS can be configured in the same CORESET.
  • CSS means CORESET in which CSS is composed
  • USS may mean CORESET in which USS is composed. Since the USS can be indicated by an RRC message, an RRC connection may be required for the UE to decode the USS.
  • the USS may include control information for PDSCH decoding allocated to the UE.
  • the PDCCH must be decoded, so CSS must be defined.
  • CSS may be defined when a PDCCH for decoding a PDSCH carrying SIB1 is configured or when a PDCCH for receiving MSG 2/4 is configured in a random access procedure.
  • the PDCCH can be scrambled by a radio network temporary identifier (RNTI) for a specific purpose.
  • RNTI radio network temporary identifier
  • BWP bandwidth parts
  • CRB common RBs
  • FIG 13 shows an example of a frequency allocation method to which the technical features of the present specification can be applied.
  • a plurality of BWPs may be defined in a CRB grid.
  • the reference point of the CRB grid (which may be referred to as the common reference point, starting point, etc.) is called the "point A" in the NR.
  • Point A is indicated by the RMSI (ie SIB1). Specifically, the frequency offset between the frequency band where the SS / PBCH block is transmitted and point A may be indicated through RMSI.
  • Point A corresponds to the center frequency of CRB0.
  • the point A may be a point where the variable “k” indicating the frequency band of RE in NR is set to 0.
  • the multiple BWPs illustrated in FIG. 8 are configured with one cell (eg, a primary cell (PCell)).
  • the plurality of BWPs may be configured for each cell individually or in common.
  • each BWP can be defined by a size and a starting point from CRB0.
  • the first BWP that is, BWP # 0 may be defined by a starting point through an offset from CRB0, and the size of BWP # 0 may be determined through a size for BWP # 0.
  • a certain number (eg, up to 4) of BWPs can be configured for the UE. Even if a plurality of BWPs are configured, only a specific number (eg, 1) of BWPs can be activated per cell for a given time. However, when a supplementary uplink (SUL) carrier is configured in the UE, a maximum of 4 BWPs may be additionally configured in the SUL carrier, and 1 BWP may be activated for a given time.
  • the number of configurable BWPs or the number of activated BWPs may be configured for UL and DL in common or individually.
  • the neurology and / or CP for the DL BWP and the neurology and / or CP for the UL BWP may be configured in the UE through DL signaling.
  • the UE may receive PDSCH, PDCCH, channel state information (CSI) RS, or tracking RS (TRS) only in the active DL BWP.
  • the UE may transmit PUSCH and / or physical uplink control channel (PUCCH) only to the active UL BWP.
  • PUCCH physical uplink control channel
  • the first BWP may span a 40 MHz band and a subcarrier spacing of 15 kHz may be applied.
  • the second BWP may span the 10 MHz band and a subcarrier spacing of 15 kHz may be applied.
  • the third BWP may span the 20 MHz band and a subcarrier spacing of 60 kHz may be applied.
  • the UE may configure at least one BWP among the three BWPs as an active BWP, and may perform UL and / or DL data communication through the active BWP.
  • the time resource may be indicated in a manner indicating a time difference / offset based on a transmission time point of a PDCCH that allocates DL or UL resources. For example, the starting point of the PDSCH / PUSCH corresponding to the PDCCH and the number of symbols occupied by the PDSCH / PUSCH may be indicated.
  • CA Carrier aggregation
  • CC Carrier aggregation
  • PSC primary serving cell
  • PCC primary CC
  • SSC secondary serving cell
  • SCC secondary CC
  • System information is divided into MIB and several SIBs.
  • -MIB is repeatedly transmitted within a period of 80 ms and 80 ms through a broadcast channel (BCH), and includes parameters required to obtain SIB1 in a cell.
  • BCH broadcast channel
  • SIB1 is periodically and repeatedly transmitted through a downlink shared channel (DL-SCH).
  • SIB1 includes information about the availability and scheduling of other SIBs (eg, period, SI window size).
  • SIB1 indicates whether other SIBs are provided on a periodic broadcast basis or on-demand. If other SIBs are provided on demand, SIB1 includes information for the UE to perform SI requests.
  • SIBs other than SIB1 are transmitted as SI messages and transmitted through DL-SCH.
  • Each SI message is transmitted in a time domain window (called an SI window) that occurs periodically.
  • RAN provides necessary SI through dedicated signaling. Nevertheless, the UE must acquire the MIB of the PSCell to obtain the system frame number (SFN) timing of the secondary cell group (SCG) (which may be different from the master cell group (MCG)).
  • SFN system frame number
  • SCG secondary cell group
  • MCG master cell group
  • the RAN releases and adds the related SCell.
  • SI can be changed only by reconfiguration through synchronization.
  • the UE acquires access stratum (AS) and non-access stratum (NAS) information by applying an SI acquisition procedure.
  • the procedure applies to UEs in the RRC idle state (RRC_IDLE), RRC inactive state (RRC_INACTIVE) and RRC connected state (RRC_CONNECTED).
  • UEs of RRC_IDLE and RRC_INACTIVE have (at least) MIB1, SIB1, and valid versions from SystemInformationBlockTypeX to SystemInformationBlockTypeY (depending on the support of the relevant RAT for UE control mobility).
  • the UE of RRC_CONNECTED has (at least) a valid version of MIB, SIB1 and SystemInformationBlockTypeX (according to mobility support for the relevant RAT).
  • the UE stores the related SI obtained from the current camping / serving cell.
  • the version of SI that the UE acquires and stores is only valid for a certain time.
  • the UE may use this stored version of SI, for example, after cell reselection, after returning from out of coverage, or after an SI change instruction.
  • the random access procedure of the UE can be summarized by Table 5.
  • Stage 1 UL to PRACH (physical random access channel) preamble * Initial beam acquisition * Random selection of RA preamble ID
  • Stage 2 Random access response on DL-SCH * Timing alignment information * RA preamble ID * Initial UL grant, cell radio network temporary identifier (C-RNTI)
  • Stage 3 UL transmission on UL-SCH (uplink shared channel) * RRC connection request * UE ID
  • Stage 4 Resolution of competition on DL * Temporary C-RNTI for initial access on PDCCH * C-RNTI for UE in RRC_CONNECTED on PDCCH
  • the UE may transmit the PRACH preamble in UL as Msg1 of the random access procedure.
  • the long sequence length 839 applies to the subcarrier spacing of 1.25 and 5 kHz, and the short sequence length 139 applies to the subcarrier spacing of 15, 30, 60 and 120 kHz.
  • Long sequences support unrestricted sets and restricted sets of types A and B, while short sequences support only unrestricted sets.
  • RACH preamble formats are defined by one or more RACH OFDM symbols, different CP and guard times.
  • the PRACH preamble configuration to be used is provided to the UE in system information.
  • the UE can retransmit the PRACH preamble through power ramping within a specified number of times.
  • the UE calculates the PRACH transmission power for retransmission of the preamble based on the most recently estimated path loss and power ramping counter. When the UE performs beam switching, the power ramping counter remains unchanged.
  • FIG. 17 shows an example of a threshold value of an SS / PBCH block for RACH resource association to which the technical features of the present specification can be applied.
  • the system information informs the UE of the association between the SS / PBCH block and the RACH resource.
  • the threshold value of the SS / PBCH block for RACH resource association is based on RSRP (reference signal received power) and network configuration.
  • the transmission or retransmission of the RACH preamble is based on the SS / PBCH block satisfying the threshold.
  • the DL-SCH may provide timing alignment information, an RA preamble ID, an initial UL grant, and a temporary C-RNTI. .
  • the UE may perform UL transmission through UL-SCH as Msg3 of the random access procedure.
  • Msg3 may include an RRC connection request and a UE identifier.
  • the network may send Msg4 that can be treated as a contention resolution message on the DL.
  • the UE can enter the RRC connected state.
  • layer 1 Before starting the physical random access procedure, layer 1 receives the SS / PBCH block index from the upper layer and provides a corresponding RSRP measurement set to the upper layer.
  • layer 1 Before starting the physical random access procedure, layer 1 receives the following information from the upper layer.
  • PRACH transmission parameters PRACH preamble format, time resource and frequency resource for PRACH transmission
  • the L1 random access procedure is the transmission of the random access preamble (Msg1) on the PRACH, the RAR message (Msg2) on the PDCCH / PDSCH, and, if applicable, the transmission of the Msg3 PUSCH and the transmission of the PDSCH for contention resolution It includes.
  • the random access preamble transmission has the same subcarrier spacing as the random access preamble transmission initiated by the upper layer.
  • the UE If the UE consists of two UL carriers for the serving cell (i.e., UL carrier and supplemental UL (SUL) carrier) and the UE detects the PDCCH command, the UE uses the UL / SUL indicator field value from the detected PDCCH command.
  • the UL carrier for transmission of the corresponding random access preamble is determined.
  • a physical random access procedure is triggered according to a request of PRACH transmission by a higher layer or PDCCH command.
  • the configuration by the upper layer for PRACH transmission includes the following.
  • RA-RNTI random access RNTI
  • the preamble is transmitted using the selected PRACH format with transmit power P PRACH, b, f, c (i) on the indicated PRACH resource.
  • the UE is provided with the number of SS / PBCH blocks associated with one PRACH opportunity by the value of the upper layer parameter SSB - perRACH -Occasion .
  • the value of SSB - perRACH -Occasion is less than 1, one SS / PBCH block is mapped to 1 / SSB -per- rach -occasion consecutive PRACH opportunities.
  • the UE is provided the number of preambles per SS / PBCH block by the value of the upper layer parameter cb- preamblePerSSB , and the UE is a multiple of the value of SSB - perRACH -Occasion and cb-preamblePerSSB per SS / PBCH block per PRACH opportunity Determine the total number of preambles.
  • the SS / PBCH block index is mapped to the PRACH opportunity in the following order.
  • the frequency resource index increases in the frequency multiplexed PRACH opportunity
  • the UE In response to the PRACH transmission, the UE attempts to detect the PDCCH with the corresponding RA-RNTI during the window controlled by the upper layer.
  • the window starts at the first symbol of the earliest control resource set in which the UE consists of a Type1-PDCCH common search space, which is at least ceil ( ⁇ * N slot subframe , u * N symb slot ) from the last symbol of the transmission of the preamble sequence / T sf ) symbol.
  • the length of the window in the number of slots, based on the subcarrier spacing for the Type0-PDCCH common search space, is provided by the upper layer parameter rar -WindowLength .
  • the UE When the UE detects a PDCCH including a corresponding RA-RNTI and a corresponding PDSCH including a DL-SCH transport block in a window, the UE delivers the transport block to a higher layer.
  • the upper layer analyzes transport blocks for random access preamble identity (RAPID) related to PRACH transport.
  • RAPID random access preamble identity
  • the upper layer When the upper layer identifies RAPID in the RAR message of the DL-SCH transport block, the upper layer indicates the UL grant to the physical layer. This is called RAR UL grant in the physical layer. If the upper layer does not identify the RAPID associated with the PRACH transmission, the upper layer may instruct the physical layer to transmit the PRACH preamble.
  • the minimum time between the last symbol of PDSCH reception and the first symbol of PRACH transmission is equal to N T, 1 + ⁇ new + 0.5 msec, where N T, 1 is assigned to PDSCH processing capability 1 when an additional PDSCH DM-RS is configured.
  • the UE has the same DM-RS antenna port QCL characteristic as the detected SS / PBCH block or the received channel state information reference signal (CSI-RS), and the corresponding PDSCH including the PDCCH and the DL-SCH transport block with the corresponding RA-RNTI To receive.
  • CSI-RS channel state information reference signal
  • the UE assumes that the PDCCH and PDCCH commands have the same DM-RS antenna port QCL characteristics.
  • the RAR UL grant schedules PUSCH transmission (Msg3 PUSCH) from the UE.
  • the contents of the RAR UL grant starting with the most significant bit (MSB) and ending with the least significant bit (LSB) are given in Table 6.
  • Table 6 shows the random access response grant content field size.
  • the Msg3 PUSCH frequency resource allocation field is for UL resource allocation type 1.
  • the first or two bits of the Msg3 PUSCH frequency resource allocation field, N UL, hop bits are used as the hopping information bits.
  • the MCS is determined from the first 16 indexes of the applicable MCS index table for PUSCH.
  • the TPC command ⁇ msg2, b, f, c is used to set the power of the Msg3 PUSCH.
  • the CSI request field is interpreted to determine whether an aperiodic CSI report is included in the corresponding PUSCH transmission.
  • the CSI request field is reserved.
  • the UE receives a subsequent PDSCH using the same subcarrier interval as the PDSCH reception providing the RAR message.
  • the UE If the UE does not detect a PDCCH and a corresponding DL-SCH transport block having a corresponding RA-RNTI within a window, the UE performs a procedure of receiving a random access response.
  • the UE may perform power ramping for retransmission of the random access preamble based on the power ramping counter. However, when the UE performs beam switching in PRACH retransmission, the power ramping counter remains unchanged.
  • the UE when the UE retransmits the random access preamble for the same beam, the UE may increase the power ramping counter by 1. However, when the beam is changed, the power ramping counter is not changed.
  • the upper layer parameters msg3 - tp indicate to the UE whether the UE should apply transform precoding for Msg3 PUSCH transmission.
  • the subcarrier interval for Msg3 PUSCH transmission is provided by upper layer parameters msg3 - scs .
  • the UE transmits PRACH and Msg3 PUSCH on the same UL carrier of the same serving cell.
  • UL BWP for Msg3 PUSCH transmission is indicated by SIB1.
  • N T, 1 is a duration of an N1 symbol corresponding to PDSCH reception time for PDSCH processing capability 1 when an additional PDSCH DM-RS is configured
  • N T, 2 corresponds to PUSCH preparation time for PUSCH processing capability 1
  • N TA, max is the maximum timing adjustment (TA) value that can be provided by the RAR's TA command field.
  • the UE In response to the Msg3 PUSCH transmission when the C-RNTI is not provided to the UE, the UE attempts to detect the PDCCH with the corresponding temporary C-RNTI (TC-RNTI) scheduling the PDSCH containing the UE contention resolution ID. In response to receiving the PDSCH through the UE contention resolution ID, the UE transmits hybrid automatic repeat request (HARQ) -acknowledgement (ACK) information on the PUCCH.
  • HARQ hybrid automatic repeat request
  • ACK hybrid automatic repeat request
  • the minimum time between the last symbol of PDSCH reception and the first symbol of the corresponding HARQ-ACK transmission is equal to N T, 1 + 0.5msec.
  • N T, 1 is the duration of the N1 symbol corresponding to PDSCH reception time for PDSCH processing capability 1 when additional PDSCH DM-RS is configured.
  • the UE has only one RRC state at a time.
  • the RRC state indicates whether the RRC layer of the UE is logically connected to the RRC layer of the NG RAN.
  • the UE When the RRC connection is established, the UE is in RRC_CONNECTED or RRC_INACTIVE. Otherwise, that is, if the RRC connection is not established, the UE is in RRC_IDLE.
  • the NG RAN When in RRC_CONNECTED or RRC_INACTIVE, since the UE has an RRC connection, the NG RAN can recognize the existence of the UE in units of cells. Therefore, the UE can be effectively controlled.
  • the UE when in RRC_IDLE, the UE cannot be recognized by the NG RAN, and is managed by the core network in the tracking area unit, which is a unit of a wider area than the cell. That is, for the UE in RRC_IDLE, only the presence of the UE is recognized in a wide area unit.
  • the UE When the user first turns on the UE, the UE first searches for an appropriate cell and then maintains RRC_IDLE in the cell. Only when it is necessary to establish an RRC connection, a UE staying in RRC_IDLE establishes an RRC connection with NG RAN through an RRC connection procedure, and then transitions to RRC_CONNECTED or RRC_INACTIVE. Examples of the case where the UE of the RRC_IDLE needs to establish an RRC connection is various, such as when UL data transmission is required due to a user's telephone attempt or when a response message is transmitted in response to a paging message received from the NG RAN. .
  • FIG. 19 shows an example of a UE RRC state machine and state transition in an NR to which the technical features of the present specification can be applied.
  • the UE may transition to NR RRC_CONNECTED through connection establishment in NR RRC_IDLE.
  • the UE may transition from NR RRC_CONNECTED to NR RRC_IDLE through disconnection.
  • the UE may transition from NR RRC_CONNECTED to NR RRC_IDLE through connection deactivation.
  • FIG. 20 shows an example of a UE state machine and state transition to which the technical features of the present specification can be applied, and a mobility procedure supported between NR / NGC and E-UTRAN / EPC.
  • the UE may transition from E-UTRA RRC_IDLE to E-UTRAN RRC_CONNECTED through connection establishment.
  • the UE may transition from E-UTRAN RRC_CONNECTED to E-UTRAN RRC_IDLE through disconnection.
  • the UE may transition between E-UTRA RRC_CONNECTED and NR RRC_CONNECTED through handover.
  • the UE may transition between E-UTRAN RRC_IDLE, NR RRC_IDLE and NR RRC_INACTVE through cell reselection.
  • UE operations related to DRX may be summarized by Table 7.
  • Stage 1 RRC signaling ( MAC-CellGroupConfig ) Receive DRX configuration information
  • Stage 2 MAC CE (control element) ((Long) DRX command MAC CE) DRX command received
  • FIG. 21 shows an example of a DRX cycle to which the technical features of the present specification can be applied.
  • the UE uses DRX in RRC_IDLE and RRC_INACTIVE to reduce power consumption.
  • DRX When DRX is configured, the UE performs DRX operation according to the DRX configuration information. For example, when DRX is configured, the UE attempts to receive the PDCCH only during a predetermined time interval, and does not attempt to receive the PDCCH during the rest of the period. That is, when DRX is configured, the UE does not need to continuously monitor the PDCCH. At this time, the period during which the UE should attempt to receive the PDCCH is called on-duration, and the on-duration is defined once every DRX cycle.
  • the UE may receive DRX configuration information from the gNB through RRC signaling, and may operate as DRX through reception of (Long) DRX command MAC CE.
  • DRX configuration information may be included in IE MAC- CellGroupConfig .
  • IE MAC- CellGroupConfig is used to configure MAC parameters for cell groups, including DRX.
  • the DRX command MAC CE or Long DRX command MAC CE is identified as a MAC PDU subheader with LCID.
  • -Inactivity timer a period in which the UE waits to successfully decode the PDCCH from the last successful decoding of the PDCCH, and if it fails again, it may return to sleep.
  • the UE restarts the inactivity timer following a single successful decoding of the PDCCH for the first transmission (ie, not retransmission).
  • -Retransmission timer The period of time until retransmission is expected.
  • -Period Defines the periodic repetition of on-duration and potentially inactive timers.
  • the UE monitors one paging occasion (PO) per DRX cycle, and one PO can be configured with multiple time slots (eg, subframes or OFDM symbols) through which paging DCI can be transmitted. .
  • the length of one PO is one period of beam sweeping, and the UE can assume that the same paging message is repeated in all beams of the beam sweeping pattern.
  • the paging message is the same for both paging initiated by RAN and paging initiated by CN.
  • One paging frame is one radio frame that may include one or more POs.
  • the UE When the UE receives RAN paging, it initiates an RRC connection resumption procedure. When the UE receives paging initiated by CN in RRC_INACTIVE, the UE moves to RRC_IDLE to notify the NAS.
  • various embodiments proposed in the present specification for effectively reducing UE power consumption in NR will be described.
  • various embodiments of the present specification for effectively reducing UE power consumption may be proposed in connection with the initial access process and / or DRX of the NR described above.
  • the default power saving mode which will be described later, is used.
  • a basic measurement mode to be described later may be configured by SIB or defined by a standard document.
  • the mechanism to be described later can be applied to different measurement modes in on-duration and inactivity time in DRX.
  • the UE / wireless device and / or network / base station is only an example, and may be alternatively applied to various devices described in the above-described FIGS. 1, 2, 4 or 5, etc. .
  • the UE / wireless device may correspond to the wireless device 100x of FIG. 1, the first wireless device 100 of FIG. 2, the wireless device 100 of FIG. 4, or the portable device 100 of FIG. 5.
  • the network / base station may correspond to the base station 200 of FIG. 1, the second wireless device 200 of FIG. 2, or the wireless device 200 of FIG. 4.
  • FIG. 22 shows an example of a method of receiving a plurality of measurements according to an embodiment of the present specification.
  • step S2200 the wireless device receives the first measurement configuration and the second measurement configuration from the network.
  • the first measurement configuration may be mapped to a first measurement mode that is a reduced measurement mode
  • the second measurement configuration may be mapped to a second measurement mode that is a complete measurement mode.
  • the number of objects to be measured may be reduced or the measurement period may be longer.
  • the frequency to be measured in the first measurement mode and the frequency to be measured in the second measurement mode may be different.
  • the configuration of the reference signal used in the first measurement mode and the configuration of the reference signal used in the second measurement mode may be different.
  • step S2210 the wireless device applies either the first measurement configuration or the second measurement configuration based on the measurement state of the wireless device.
  • the measurement state of the wireless device may be based on at least one of the power state of the wireless device, the mobility state of the wireless device, the traffic rate of the wireless device, the remaining power of the wireless device, the active DL BWP, and the active UL BWP. have. In addition, the measurement state of the wireless device may be based on at least one of the number of active carriers and / or active RATs.
  • the wireless device may select a measurement configuration to be applied among the first measurement configuration or the second measurement configuration.
  • the selection of the measurement configuration may be based on at least one of DRX and / or BWP and / or the number of aggregated carriers.
  • the network may select a measurement configuration to be applied among the first measurement configuration or the second measurement configuration, and transmit information on the selected measurement configuration to the wireless device.
  • Measurement is performed based on the applied measurement configuration, and results of the performed measurement can be transmitted to the network.
  • a plurality of measurement configurations are set, and the wireless device may apply at least one of the plurality of measurement configurations according to the measurement state of the wireless device. Accordingly, when a certain condition is satisfied, measurement may be relaxed and power consumption of the UE may be reduced.
  • FIG. 23 shows an example of performing a measurement based on an SS / PBCH block and reporting a measurement result according to an SMTC configuration according to an embodiment of the present specification.
  • FIG. 23 is an exemplary implementation of an embodiment of the present specification, and the description of the present specification, which will be described later, is not limited to FIG. 23.
  • a network may configure at least one SMTC configuration in at least one UE.
  • the at least one SMTC configuration may be configured through RRC signaling, for example, but is not limited thereto.
  • the SMTC configuration may include the following SMTC configuration 1 (smtc1) and / or SMTC configuration 2 (smtc2).
  • -SMTC configuration 1 (smtc1): This is a primary measurement timing configuration and can be applied to measurements within and / or between frequencies.
  • -SMTC Configuration 2 (smtc1): Secondary measurement timing configuration for SS / PBCH block corresponding to this MeasObjectNR with PCI listed in pci-List.
  • the period is indicated by the period of smtc2, and the timing offset is the same as the value calculated by modulo the offset indicated by periodicityAndOffset .
  • the period of smtc2 can be set only to a value shorter than the period indicated by periodicityAndOffset of smtc1. For example, if periodicityAndOffset indicates sf10, the period of smtc2 can be composed only of sf5, and if periodicityAndOffset indicates sf5, smtc2 cannot be configured.
  • the UE may perform related measurements based on at least one SMTC configuration.
  • the measurement may be for the SS / PBCH block.
  • the UE may report the result of the measurement based on the SMTC configuration to the network. Or, such a reporting process may be omitted. For example, if the measurement result satisfies a predetermined condition (for example, a predefined or network-configured condition), the measurement result may be reported to the network.
  • a predetermined condition for example, a predefined or network-configured condition
  • the current NR supports smtc1 and smtc2 as SS / PBCH block-based measurements.
  • Smtc1 supports the measurement of the SS / PBCH block based on the basic period of the longer period, and smtc2 more actively supports the measurement of the SS / PBCH block based on the shorter period.
  • various measurement configurations can be considered as follows.
  • the UE may be configured by a plurality of SMTC configurations, and a set of different SMTC configurations may be activated in each power state.
  • the power state may be determined based on UE mobility and / or traffic rate and / or UE residual power and / or active DL BWP and / or active UL BWP and / or number of active carriers and / or active RAT .
  • SS / PBCH block based measurement is performed only based on smtc1 (i.e. even if smtc2 is set, the smtc2 based measurement can be omitted by the UE), but in other cases
  • the SS / PBCH block based measurement may be performed based on smtc1 and smtc2 (for example, a BWP or an initial BWP that is not a normal state or a default BWP).
  • the UE may perform measurement based on only one of smtc1 or smtc2 even if smtc 1/2 is set. Or, the UE may assume that both smtcs are disabled. Alternatively, the UE may assume that smtc to be used in this situation is separately set. More specifically, in this situation, the period of smtc can be set very long.
  • LTE Long Term Evolution
  • 5G network for example, NR
  • the measurement for NR may be simplified.
  • the SMTC configuration used for each frequency may be configured differently.
  • measurement may be performed for one SMTC by deactivating or more relaxed measurement for the already configured SMTC.
  • a frequency to be measured is set, and measurement can be performed based on only one of smtc1 or smtc2 at the corresponding frequency. In order to simplify all these settings, in this case, it is assumed that it always operates based on the measurement gap, and a more relaxed measurement gap can be set.
  • the UE may be configured by two or more SMTC configurations.
  • the set of SMTC configurations may be selected differently for each power state and / or for each BWP.
  • the set of SMTC configurations may be selected by explicit signaling such as L1 signaling and / or MAC CE and / or RRC signaling.
  • explicit signaling such as L1 signaling and / or MAC CE and / or RRC signaling.
  • CMTC adjustment and configuration for CSI-RS based measurement, which will be described later. That is, different measurement opportunities for CSI-RS may be activated per power state and / or per BWP, or may be activated by explicit signaling such as L1 signaling and / or MAC CE and / or RRC signaling.
  • -UE is a frequency layer according to a combination of measurement mode and measurement configuration determined according to power state and / or BWP and / or condition, or according to explicit signaling such as L1 signaling and / or MAC CE and / or RRC signaling And / or may have different requirements for the number of CSI-RS or SS / PBCH block-based measurements for each number of frequency layers.
  • the number of CSI-RS or SS / PBCH block-based measurements may generally be reduced in power efficiency mode.
  • the serving cell quality of a PCell and / or a primary SCell (PSCell) and / or a configured cell can be considered.
  • the UE may also be configured with a set of different frequency layers for measurement for each measurement mode. Some frequency layers composed of smtc1 and / or smtc2 may be measured in one measurement mode, and all frequencies included in the measurement target configuration may be measured in other measurement modes.
  • a UE supporting both LTE and NR such as EN-DC
  • LTE LTE
  • NR NR
  • the LTE cell can support measurement assistance for the UE to find the NR cell regardless of whether EN-DC is supported.
  • the LTE cell may configure the measurement configuration at the NR frequency of the corresponding UE, configure a preferred frequency list of the NR cell, or inform the UE about the possibility of the existence of the NR cell.
  • the LTE cell may enable / disable NR measurement itself.
  • the NR cell may transmit information on measurement related to LTE, unlicensed spectrum, 3G, and / or 2G to the UE, and may configure / disable measurement for each RAT.
  • the LTE cell and / or the NR cell may configure a suitable measurement target and / or measurement gap configuration for each RAT.
  • This information may only be used by UEs capable of supporting NR.
  • a UE supporting only LTE may use the corresponding information to avoid measurement.
  • a plurality of SMTC configurations are set, and the UE may perform measurement on the SS / PBCH block according to at least one of the plurality of SMTC configurations according to the state of the UE . Accordingly, when a certain condition is satisfied, measurement may be relaxed and power consumption of the UE may be reduced.
  • CMTC CSI-RS measurement timing configuration
  • SS / PBCH block-based measurement may be configured by SMTC.
  • a similar approach can be applied to CSI-RS. That is, CSI-RS based measurement may be configured by CMTC.
  • FIG. 24 shows an example of performing measurement based on CSI-RS and reporting the measurement result according to the CMTC configuration according to an embodiment of the present specification.
  • FIG. 24 is an exemplary implementation of an embodiment of the present specification, and the description of the present specification described later is not limited to FIG. 24.
  • a network eg, at least one base station / gNB
  • the at least one CMTC configuration may be configured through RRC signaling, for example, but is not limited thereto.
  • the UE may perform related measurements based on at least one CMTC configuration.
  • the measurement may be a measurement for CSI-RS.
  • the UE may report the result of the measurement based on the CMTC configuration to the network. Or, such a reporting process may be omitted. For example, if the measurement result satisfies a predetermined condition (for example, a predefined or network-configured condition), the measurement result may be reported to the network.
  • a predetermined condition for example, a predefined or network-configured condition
  • the embodiment of FIG. 23 and the embodiment of FIG. 24 may be combined.
  • the UE may receive information on at least one SMTC configuration and information on at least one CMTC configuration from a network, and select one of them to perform measurement and reporting.
  • CMTC When CMTC is configured, the following contents may be considered at the UE side.
  • the UE may be selectively configured with one or more CMTC.
  • One CMTC may consist of a period, offset and / or duration for measurement.
  • the UE can perform measurement only in CMTC instead of following CSI-RS configuration for measurement configuration. Accordingly, the UE's requirement for measurement can be relaxed to count the number of CMTC intervals (eg, K * CMTC period) for the measurement duration requirement.
  • CSI-RS can still be transmitted according to the required rate matching and / or data mapping. Or, if configured or basically, the UE may not regard CSI-RS outside of CMTC as valid transmission. That is, from the viewpoint of the reception operation, rate matching and / or data mapping may not be applied to CSI-RS outside the CMTC.
  • a larger period of the measurement gap and the CMTC period (and / or SMTC period) may be used as the measurement gap.
  • the -Different measurement gaps can be configured for different measurement modes.
  • the measurement mode can be defined based on the power state and / or the quality of the serving cell and / or explicit signaling such as BWP and / or L1 signaling, MAC CE, RRC signaling.
  • a set of frequency layers (eg, closed subscriber group (CSG) layer, unlicensed spectrum, etc.) that cannot be measured in the power efficiency mode may be configured.
  • CSG closed subscriber group
  • measurement of the unlicensed spectrum may be deactivated when the traffic rate of the UE is low.
  • the frequency of frequency range 2 (FR2), which means a frequency range of 6 GHz or more, may not be measured in a power efficiency mode.
  • the inability to measure for a particular set of frequencies can be determined automatically based on the measurement mode or explicitly configured by the network.
  • CSI-RS based measurement can be performed only within the SMTC.
  • CSI-RS based measurement can be activated only when the UE is not in the power efficiency mode.
  • the UE performs only basic measurements, and CSI-RS based measurements are not considered basic measurements.
  • the UE may be configured with different measurement sets for one or more of the following.
  • different RRM requirements may be specified according to the measurement mode and / or power saving mode.
  • the UE performs various measurements such as CSI feedback, beam management related measurement, radio link monitoring (RLM), and RRM at active time. Since the UE consumes high power when making complex measurements, it is desirable to minimize the amount of measurements unless absolutely necessary.
  • RLM radio link monitoring
  • a plurality of CMTC configurations are set, and the UE may perform measurement for CSI-RS according to at least one of the plurality of CMTC configurations according to the state of the UE. Accordingly, when a certain condition is satisfied, measurement may be relaxed and power consumption of the UE may be reduced.
  • 25 illustrates an example in which a UE selects / determines at least one measurement configuration among a plurality of measurement configurations according to an embodiment of the present specification, performs measurement based on only the selected measurement configuration, and reports measurement results.
  • FIG. 25 is an exemplary implementation of an embodiment of the present specification, and the description of the specification described below is not limited to FIG. 25.
  • a network may configure various different types of measurement configurations to at least one UE.
  • Various different types of measurement configurations may be set through RRC signaling, for example, but are not limited thereto.
  • Various different types of measurement configurations may be provided in one signaling or may be signaled independently of each other.
  • Various different types of measurement configurations may include the aforementioned SMTC and / or CMTC, and may further include CSI feedback, beam management-related measurement, RLM and / or RRM, and the like.
  • a mode related to measurement (hereinafter simply a measurement mode) may be defined and / or configured.
  • the UE may select and / or determine a measurement mode in which it operates, among measurement modes.
  • the UE may perform the related measurement based on the selected and / or determined measurement mode and / or measurement configuration.
  • the UE may report the result of the measurement based on the selected and / or determined measurement mode and / or measurement configuration to the network. Or, such a reporting process may be omitted. For example, if the measurement result satisfies a predetermined condition (for example, a predefined or network-set condition), the measurement result may be reported to the network.
  • a predetermined condition for example, a predefined or network-set condition
  • a plurality of measurement configurations of different types are set, and the UE can directly perform measurement by selecting a measurement mode. Accordingly, when a certain condition is satisfied, measurement may be relaxed and power consumption of the UE may be reduced.
  • 26 illustrates an example in which the network selects / determines at least one measurement configuration among a plurality of measurement configurations, and the UE performs measurement based on only the selected measurement configuration and reports the measurement result.
  • the network selects / determines at least one measurement configuration among a plurality of measurement configurations, and the UE performs measurement based on only the selected measurement configuration and reports the measurement result.
  • FIG. 26 is an exemplary implementation of an embodiment of the present specification, and a description of the present specification described below is not limited to FIG. 26.
  • a network may configure various different types of measurement configurations to at least one UE.
  • Various different types of measurement configurations may be set through RRC signaling, for example, but are not limited thereto.
  • Various different types of measurement configurations may be provided in one signaling or may be signaled independently of each other.
  • Various different types of measurement configurations may include the aforementioned SMTC and / or CMTC, and may further include CSI feedback, beam management-related measurement, RLM and / or RRM, and the like.
  • measurement modes can be defined and / or configured.
  • the network may select and / or determine a measurement mode in which the UE will operate among measurement modes related to measurement.
  • the network may explicitly signal information about the selected and / or determined measurement mode and / or measurement configuration to the UE.
  • the UE which has received the information on the selected and / or determined measurement mode and / or measurement configuration from the network, may perform measurement based on the selected and / or determined measurement mode and / or measurement configuration in step S2630. Further, in step S2640, the UE may report the result of the measurement based on the selected and / or determined measurement mode and / or measurement configuration to the network. Or, such a reporting process may be omitted. For example, if the measurement result satisfies a predetermined condition (for example, a predefined or network-set condition), the measurement result may be reported to the network.
  • a predetermined condition for example, a predefined or network-set condition
  • a plurality of measurement configurations of different types are set, and when the network informs the UE of a measurement mode in which the UE operates, the UE performs measurement according to the measurement mode Can be done. Accordingly, when a certain condition is satisfied, measurement may be relaxed and power consumption of the UE may be reduced.
  • a reduced measurement mode and a full scale measurement mode may be defined and / or configured.
  • two or more measurement modes can be considered in which different measurement operations are expected.
  • each measurement mode may be configured with a set of different measurement RS configurations for RS, period, and number of RSs used.
  • different measurement requirements e.g. the number of frequency layers to be monitored, the number of SS / PBCH blocks to be detected, and / or the number of CSI-RSs, etc.
  • each measurement mode may be configured with different measurement reporting configurations.
  • the reporting cycle and mechanism e.g. aperiodic reporting or semi-permanent reporting
  • a reduced measurement mode may be used in on-duration of DRX, and a full measurement mode may be used at other active times.
  • the reduced measurement mode may be used in operation on a DRX having a long DRX period, and the complete measurement mode may be used in operation on a DRX having a short DRX period.
  • the reduced measurement mode may be used for inter-frequency measurements, and the complete measurement mode may be used for intra-frequency measurement of a PCell (or PSCell).
  • the reduced measurement mode can be used in the default BWP (when the default BWP is the active BWP), and the full measurement mode can be used in the remaining BWP.
  • the measurement mode may be changed and / or the reduced measurement mode may be used.
  • the measurement mode may be changed and / or the reduced measurement mode may be used.
  • a plurality of measurement objects may be configured for each frequency.
  • Each measurement object can be selected based on a specific set of criteria constructed with the measurement object. For example, for a serving cell or a frequency having a serving cell, one measurement object may be used only when the serving cell quality becomes a certain threshold value, and otherwise, another measurement object may be used.
  • events may be configured for each frequency or for each UE. When the event is triggered, another measurement object can be used.
  • an event in which the serving cell quality becomes lower than the threshold X can be configured, and when the event is triggered, instead of performing measurement and / or reporting, the UE measures from the reduced measurement mode to the full measurement mode
  • the mode can be changed and / or the measurement object can be changed accordingly.
  • different measurements may be defined for each DRX configuration.
  • multiple measurement targets may be associated with multiple different DRX configurations.
  • a set of measurement modes and / or measurement objects can be defined.
  • a full measurement mode can be used.
  • a reduced measurement mode can be used.
  • a threshold can be configured so that a reduced measurement mode can be used (or a full measurement mode can be used again) if the measurement result is higher than (or lower than) the threshold.
  • RLM may be omitted for a specific time T (ie Q_in is sent for every RLM opportunity). This allows several RLMs to be skipped.
  • the UE may omit beam management reporting for a specific time T1.
  • the motivation for this mechanism is to allow the omission of measurements when the measurement results are good.
  • the threshold value and / or the time to omit the measurement may be configured for each measurement object and / or for each measurement RS and / or for each measurement report configuration.
  • RRM or STMC or CSI-RS based RRM measurement
  • the RRM measurement can be omitted for a specific time.
  • the s-Measure threshold configured in the PCell and / or PSCell may be used.
  • the quality of the configured carrier serving cell e.g. PCell and / or PSCell
  • the UE can switch to the reduced measurement mode.
  • the s-Measure threshold is configured, instead of stopping the entire RRM measurement (e.g. inter-frequency and / or intra-frequency neighbor cell measurement), the UE can perform the measurement in the reduced measurement mode.
  • the reduced set of measurement requirements can be specified or configured by the network. For example, a set of frequencies to be monitored can be configured with the s-Measure threshold.
  • the s-Measure threshold may be configured for each frequency layer, and when the UE is configured as a serving cell at a specific frequency, the UE may stop measuring adjacent cells at the corresponding frequency. Otherwise, regardless of the configuration of the s-Measure threshold, the UE can perform measurements at that frequency.
  • a reduced measurement mode may be used. Or, it can trigger the use of a measurement mode with reduced connectivity to the Wi-Fi network.
  • the use of the measurement mode can be implicitly triggered. This information may implicitly indicate the mobility of the UE, and if the UE does not move, measurement may be relaxed according to the reduced measurement mode.
  • Changes to the measurement mode can be explicitly indicated.
  • different RNTIs may be used for each measurement mode in the control signal / data transmission.
  • C-RNTI may be associated with a complete measurement mode
  • R-C-RNTI reserved C-RNTI
  • the UE can switch to the reduced measurement mode associated with the R-C-RNTI.
  • the UE can switch back to full measurement mode.
  • switching between different measurement modes may be performed by explicitly transmitting MAC CE or DCI. Similar to the parameters in the power saving mode, a set of measurement objects and / or measurement modes can be pre-configured and can be dynamically indicated through MAC CE and / or DCI along with other parameters in the power saving mode.
  • switching between different measurement modes may be performed by explicitly transmitting MAC CE or DCI. Similar to the parameters in the power saving mode, a set of measurement objects and / or measurement modes can be pre-configured and can be dynamically indicated through MAC CE and / or DCI along with other parameters in the power saving mode.
  • a measurement mode used in each BWP, DRX state and / or carrier may be configured.
  • Different measurement modes may refer to one or more of the following.
  • Different measurements may be used for each carrier and / or between a serving cell and a neighboring cell and / or between a frequency set and / or BWP. That is, different measurement modes may be triggered and / or configured for each carrier and / or between a serving cell and a neighboring cell and / or between a frequency set and / or BWP.
  • the UE when the UE performs measurement, it is not desirable to open the RF for measurement only.
  • the UE performs measurement in the frequency layer without a measurement gap there may be the following two cases.
  • -RF for measurement (eg, in-frequency measurement) can be shared between the active serving cell and the measurement.
  • -Extra RF is used for the measurement, which is not used for the active serving cell (e.g. using CA function).
  • the UE does not need to perform measurements on a set of frequency layers that require active RF that need not be activated unless it is a measurement. For example, when a separate RF is used for the measurement, it is not necessary to perform the measurement in the frequency layer that requires the RF for the measurement. Moreover, even in RF shared with an active serving cell, measurement can be performed only when RF is activated.
  • the active period of RF may be defined by one or more of the following.
  • the active period of the RF may include OnDuration and InactivityTimer.
  • several slots before (and / or after) OnDuration may additionally be included in the active period of the RF for tracking and / or RF stabilization.
  • the same measurement configuration (eg SMTC, CMTC, measurement gap configuration, etc.) can be configured for each carrier, and the same set of measurement configurations is multiple
  • the measurement configuration can be provided for only one cell, and the same measurement configuration can be applied to other cells of the in-band carrier.
  • the BWP when the BWP is changed on one carrier, the BWP may be changed simultaneously on other carriers in the same band. From the viewpoint of associating the BWP of one cell with another BWP of another cell, the same BWP index can be used to change the BWP.
  • a BWP change from BWP 1 to BWP 2 may be performed in another cell.
  • an explicit mapping between a BWP of one cell and another BWP of another cell may be configured.
  • the DRX configuration and / or DRX operation may be applied to a plurality of carriers in a single band.
  • This operation can be applied only when the UE reports a single RF for multiple carriers in a given band. Otherwise, it cannot be assumed that the above operation applies. Or, the operation can be applied regardless of the UE RF architecture.
  • the need for measurement may vary greatly.
  • the situation of the UE for example, mobility, the number of carriers / RAT required, data rate, QoS, etc.
  • the measurement configuration that can be adjusted for each situation may include at least one of the following and / or a combination thereof.
  • -Measurement reporting condition configuration Other triggering conditions and / or events for measurement reporting may be configured.
  • -Set of primary focused function for example, whether to use NR stand-alone measurement mode, EN-DC measurement mode, LTE measurement mode only, NR / LTE may be notified to the UE whether or not to consider that it is disabled, through another RAT or PCell. This may affect the UE's IDLE state measurement.
  • -s-Measure and / or other configuration of the required action for s-Measure For example, it can be set to ignore even if the threshold value of s-Measure is very high or s-Measure is configured.
  • -A threshold for determining whether to enable or disable beam measurement can be considered. For example, when the threshold value of a beam associated with a current CORESET # 0 or a specific CORESET is greater than or equal to a certain value, or when the number of beams exceeding a threshold value is X or more, beam measurement may not be performed. In this case, it may be assumed that the measurement is performed on a corresponding beam that exceeds a threshold value.
  • Each threshold value may be configured for each carrier, frequency, or frequency range.
  • any one of the configured measurement periods can be selectively applied differently.
  • DRX When DRX is configured in the SCell, it may be configured to perform or not perform beam-related measurement in a situation where DRX is turned off. Alternatively, the measurement period and / or the number of RSs used when the DRX is turned off and when the DRX is operated may be set differently.

Landscapes

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

Abstract

La présente invention concerne un procédé et un dispositif permettant de réduire la consommation d'énergie pendant une mesure dans un système de communication sans fil. Un dispositif sans fil reçoit une pluralité de configurations de mesure à partir d'un réseau et l'une quelconque de la pluralité de configurations de mesure est appliquée sur la base de l'état de mesure du dispositif sans fil. L'état de mesure du dispositif sans fil peut se baser sur l'état de puissance du dispositif sans fil et/ou l'état de mobilité du dispositif sans fil et/ou le débit de trafic du dispositif sans fil et/ou la puissance restante du dispositif sans fil et/ou une partie de bande passante en liaison descendante activée (DL BWP) et/ou une UL BWP activée.
PCT/KR2019/012334 2018-09-21 2019-09-23 Procédé et dispositif de réduction de consommation d'énergie pendant la mesure dans un système de communication sans fil Ceased WO2020060355A1 (fr)

Applications Claiming Priority (18)

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KR20180114399 2018-09-21
KR10-2018-0114427 2018-09-21
KR20180114427 2018-09-21
KR10-2018-0114399 2018-09-21
KR10-2018-0114332 2018-09-21
KR20180114332 2018-09-21
KR20180115689 2018-09-28
KR10-2018-0115689 2018-09-28
KR20180115699 2018-09-28
KR20180115680 2018-09-28
KR10-2018-0115699 2018-09-28
KR10-2018-0115680 2018-09-28
KR10-2018-0133700 2018-11-02
KR20180133716 2018-11-02
KR10-2018-0133716 2018-11-02
KR10-2018-0133706 2018-11-02
KR20180133700 2018-11-02
KR20180133706 2018-11-02

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WO2022174800A1 (fr) * 2021-02-22 2022-08-25 维沃移动通信有限公司 Procédé de commutation d'états de terminal, appareil et terminal
US20220312236A1 (en) * 2020-04-13 2022-09-29 Apple Inc. Techniques for csi-rs configuration in wireless communications
CN115811794A (zh) * 2021-09-13 2023-03-17 哲库科技(北京)有限公司 小区调度方法、装置、电子设备和可读存储介质
CN115956381A (zh) * 2021-08-06 2023-04-11 北京小米移动软件有限公司 一种无线资源管理测量方法及其装置
WO2025112007A1 (fr) * 2023-11-30 2025-06-05 Oppo广东移动通信有限公司 Procédé et appareil de détermination de configuration de mesure, et dispositif et support
WO2026043171A1 (fr) * 2024-08-19 2026-02-26 삼성전자 주식회사 Dispositif électronique pour la réalisation d'un compte-rendu de mesure et son procédé de fonctionnement

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220312236A1 (en) * 2020-04-13 2022-09-29 Apple Inc. Techniques for csi-rs configuration in wireless communications
WO2022174800A1 (fr) * 2021-02-22 2022-08-25 维沃移动通信有限公司 Procédé de commutation d'états de terminal, appareil et terminal
CN113302967A (zh) * 2021-04-13 2021-08-24 北京小米移动软件有限公司 测量配置、测量上报方法及装置、存储介质
CN115956381A (zh) * 2021-08-06 2023-04-11 北京小米移动软件有限公司 一种无线资源管理测量方法及其装置
CN115811794A (zh) * 2021-09-13 2023-03-17 哲库科技(北京)有限公司 小区调度方法、装置、电子设备和可读存储介质
CN115811794B (zh) * 2021-09-13 2026-04-14 伟光有限公司 小区调度方法、装置、电子设备和可读存储介质
WO2025112007A1 (fr) * 2023-11-30 2025-06-05 Oppo广东移动通信有限公司 Procédé et appareil de détermination de configuration de mesure, et dispositif et support
WO2026043171A1 (fr) * 2024-08-19 2026-02-26 삼성전자 주식회사 Dispositif électronique pour la réalisation d'un compte-rendu de mesure et son procédé de fonctionnement

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