WO2020067804A1 - Procédé par lequel un terminal signale une mesure dans un système de communication sans fil, et dispositif utilisant le procédé - Google Patents

Procédé par lequel un terminal signale une mesure dans un système de communication sans fil, et dispositif utilisant le procédé Download PDF

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Publication number
WO2020067804A1
WO2020067804A1 PCT/KR2019/012648 KR2019012648W WO2020067804A1 WO 2020067804 A1 WO2020067804 A1 WO 2020067804A1 KR 2019012648 W KR2019012648 W KR 2019012648W WO 2020067804 A1 WO2020067804 A1 WO 2020067804A1
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Prior art keywords
serving cell
terminal
node
information
cell
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PCT/KR2019/012648
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English (en)
Korean (ko)
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조순기
이윤정
강지원
고현수
서인권
윤석현
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엘지전자 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • 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
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks

Definitions

  • the present disclosure relates to wireless communication, and more particularly, to a measurement report method of a terminal and an apparatus using the method in a wireless communication system.
  • MTC Massive Machine Type Communications
  • RAT new radio access technology
  • NR new radio
  • the access may mean, for example, a base station-terminal
  • the backhaul may mean, for example, a base station-base station or a base station-core network.
  • NR may use different radio resources / radio channels in access and backhaul, it is also considered to use the same radio resources and / or radio channels.
  • a radio resource and a radio channel used by the first base station to serve terminals connected through an access link can also be used for a backhaul link between the first base station and the second base station.
  • terms such as a base station and a terminal are used for convenience, and may be replaced with another term, for example, a node.
  • a node For example, suppose that the second base station controls / schedules a terminal connected through the access link to the first base station via a backhaul link with the first base station.
  • the second base station may be referred to as a parent node or a donor node, and the terminal may also be referred to as a child node.
  • the first base station may be referred to as a relay node or an IAB node.
  • link management and resource management are very important. Since a plurality of child nodes / terminals may be connected to one node, when a delay occurs in the one node, a service delay may be caused to the plurality of child nodes / terminals. In addition, a plurality of beams may be used in the IAB environment.
  • Technical problem to be solved by the present disclosure is to provide a method for reporting a measurement of a terminal in a wireless communication system and an apparatus using the method.
  • a method for reporting a measurement of a terminal in a wireless communication system identifies whether a predetermined condition is satisfied for at least one of beams transmitted from a serving cell, and when the condition is satisfied, reports a measurement result of a specific cell set to the terminal to the serving cell It is characterized by.
  • the terminal provided in another aspect includes a transceiver that transmits and receives a wireless signal and a processor that operates in combination with the transceiver, wherein the processor includes at least one of beams transmitted by the serving cell. It is characterized in that it identifies whether a predetermined condition is satisfied, and when the condition is satisfied, reports a measurement result for a specific cell set to the terminal to the serving cell.
  • a processor for a wireless communication device controls the wireless communication device to identify whether a predetermined condition is satisfied for at least one of beams transmitted by a serving cell, and the condition is If satisfied, it is characterized in that the measurement result for a specific cell set to the terminal is reported to the serving cell.
  • a measurement report based on beam-related conditions is set or triggered. That is, by setting the event (condition) by utilizing the state of the beam derived from the beam management process, the measurement report process is effectively operated.
  • FIG. 1 illustrates a wireless communication system to which the present disclosure can be applied.
  • FIG. 2 is a block diagram showing a radio protocol architecture for a user plane.
  • 3 is a block diagram showing a radio protocol structure for a control plane.
  • FIG. 4 shows another example of a wireless communication system to which the technical features of the present disclosure can be applied.
  • 5 illustrates functional division between NG-RAN and 5GC.
  • FIG. 6 illustrates a frame structure that can be applied in NR.
  • 9 is a view showing a difference between a conventional control region and CORESET in NR.
  • FIG. 10 shows an example of a frame structure for a new radio access technology.
  • 11 is an abstract diagram of a hybrid beamforming structure from the perspective of the TXRU and the physical antenna.
  • FIG. 12 shows a synchronization signal and a PBCH (SS / PBCH) block.
  • 13 is for explaining a method for a terminal to obtain timing information.
  • FIG. 14 shows an example of a process for obtaining system information of a terminal.
  • 16 is for explaining a power ramping car circle.
  • 17 is for explaining the concept of the threshold of the SS block for the RACH resource relationship.
  • IAB integrated access and backhaul
  • 21 illustrates a method for reporting a measurement of a device in a wireless communication system.
  • FIG. 22 shows a specific example of applying the method of FIG. 21.
  • 25 illustrates a signal processing circuit for a transmission signal.
  • 26 illustrates a portable device applied to the present disclosure.
  • 27 is an example of a parity check matrix represented by a protograph.
  • 29 schematically shows an example of the encoder operation of the polar code.
  • 30 is a flowchart illustrating an example of performing an idle mode DRX operation.
  • 31 schematically illustrates an example of an idle mode DRX operation.
  • 32 is a flowchart showing an example of a method for performing a C-DRX operation.
  • 35 shows another example of a wireless device applied to the present disclosure.
  • 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”.
  • E-UTRAN Evolved-UMTS Terrestrial Radio Access Network
  • LTE Long Term Evolution
  • the E-UTRAN includes a base station (BS) that provides a control plane and a user plane to a user equipment (UE) 10.
  • the terminal 10 may be fixed or mobile, and may be called other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), or a wireless device.
  • the base station 20 refers to a fixed station that communicates with the terminal 10, and may be referred to as other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), and an access point.
  • eNB evolved-NodeB
  • BTS base transceiver system
  • the base stations 20 may be connected to each other through an X2 interface.
  • the base station 20 is connected to an EPC (Evolved Packet Core 30) through an S1 interface, and more specifically, a mobility management entity (MME) through an S1-MME and a serving gateway (S-GW) through an S1-U.
  • EPC Evolved Packet Core 30
  • MME mobility management entity
  • S-GW serving gateway
  • EPC 30 is composed of MME, S-GW and P-GW (Packet Data Network-Gateway).
  • the MME has access information of the terminal or information about the capability of the terminal, and this information is mainly used for mobility management of the terminal.
  • S-GW is a gateway with E-UTRAN as an endpoint
  • P-GW is a gateway with PDN as an endpoint.
  • the layers of the radio interface protocol between the terminal and the network are based on the lower three layers of the Open System Interconnection (OSI) reference model, which is widely known in communication systems, L1 (first layer), It can be divided into L2 (second layer) and L3 (third layer), among which the physical layer belonging to the first layer provides an information transfer service using a physical channel.
  • the radio resource control (RRC) layer located in the third layer serves to control radio resources between the terminal and the network. To this end, the RRC layer exchanges RRC messages between the terminal and the base station.
  • OSI Open System Interconnection
  • FIG. 2 is a block diagram showing a radio protocol architecture for a user plane
  • FIG. 3 is a block diagram showing a radio protocol architecture for a control plane.
  • the user plane is a protocol stack for transmitting user data
  • the control plane is a protocol stack for transmitting control signals.
  • a physical layer provides an information transfer service (information transfer service) to the upper layer by using a physical channel (physical channel).
  • the physical layer is connected to the upper layer, the medium access control (MAC) layer, through a transport channel. Data moves between the MAC layer and the physical layer through the transport channel. Transport channels are classified according to how and with what characteristics data is transmitted through a wireless interface.
  • the physical channel can be modulated by an orthogonal frequency division multiplexing (OFDM) method, and utilizes time and frequency as radio resources.
  • OFDM orthogonal frequency division multiplexing
  • the functions of the MAC layer include mapping between logical channels and transport channels, and multiplexing / demultiplexing into transport blocks provided as physical channels on a transport channel of a MAC service data unit (SDU) belonging to the logical channel.
  • the MAC layer provides a service to a Radio Link Control (RLC) layer through a logical channel.
  • RLC Radio Link Control
  • the functions of the RLC layer include concatenation, segmentation and reassembly of RLC SDUs.
  • the RLC layer includes a transparent mode (TM), an unacknowledged mode (UM), and an acknowledgment mode (Acknowledged Mode).
  • TM transparent mode
  • UM unacknowledged mode
  • Acknowledged Mode acknowledgment mode
  • AM AM RLC provides error correction through automatic repeat request (ARQ).
  • RRC Radio Resource Control
  • the RRC layer is responsible for control of logical channels, transport channels, and physical channels in connection with configuration, re-configuration, and release of radio bearers.
  • RB means a logical path provided by the first layer (PHY layer) and the second layer (MAC layer, RLC layer, PDCP layer) for data transmission between the terminal and the network.
  • the functions of the Packet Data Convergence Protocol (PDCP) layer in the user plane include the transfer of user data, header compression, and ciphering.
  • the functions of the Packet Data Convergence Protocol (PDCP) layer in the control plane include transmission of control plane data and encryption / integrity protection.
  • the establishment of RB means a process of defining characteristics of a radio protocol layer and a channel to provide a specific service, and setting each specific parameter and operation method.
  • the RB can be further divided into two types: Signaling RB (SRB) and Data RB (DRB).
  • SRB is used as a path for transmitting RRC messages in the control plane
  • DRB is used as a path for transmitting user data in the user plane.
  • the UE When an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in an RRC connected state, otherwise it is in an RRC idle state.
  • the downlink transport channel for transmitting data from the network to the terminal includes a broadcast channel (BCH) for transmitting system information and a downlink shared channel (SCH) for transmitting user traffic or control messages. Traffic or control messages of a downlink multicast or broadcast service may be transmitted through a downlink SCH or may be transmitted through a separate downlink multicast channel (MCH).
  • an uplink transport channel for transmitting data from a terminal to a network includes a random access channel (RACH) for transmitting an initial control message and an uplink shared channel (SCH) for transmitting user traffic or a control message.
  • RACH random access channel
  • SCH uplink shared channel
  • Logical channels that are located above the transport channel and are mapped to the transport channel include BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), and MTCH (Multicast Traffic). Channel).
  • BCCH Broadcast Control Channel
  • PCCH Paging Control Channel
  • CCCH Common Control Channel
  • MCCH Multicast Control Channel
  • MTCH Multicast Traffic. Channel
  • the physical channel is composed of several OFDM symbols in the time domain and several sub-carriers in the frequency domain.
  • One sub-frame (Sub-frame) is composed of a plurality of OFDM symbols (Symbol) in the time domain.
  • the resource block is a resource allocation unit, and is composed of a plurality of OFDM symbols and a plurality of sub-carriers.
  • each subframe may use specific subcarriers of specific OFDM symbols (eg, the first OFDM symbol) of a corresponding subframe for a physical downlink control channel (PDCCH), that is, an L1 / L2 control channel.
  • TTI Transmission Time Interval
  • new radio access technology new radio access technology: new RAT, NR
  • next-generation wireless access technology As more communication devices require a larger communication capacity, there is a need for improved mobile broadband communication compared to a conventional radio access technology (RAT).
  • MTC Massive Machine Type Communications
  • NR Ultra-Reliable and Low Latency Communication
  • FIG. 4 shows another example of a wireless communication system to which the technical features of the present disclosure can be applied.
  • FIG. 4 shows a system architecture based on a 5G new radio access technology (NR) system.
  • the entity used in the 5G NR system may absorb some or all functions of the entity introduced in FIG. 1 (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 UE 11, 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 BS 20 shown in FIG. 1.
  • the NG-RAN node is composed of at least one gNB 21 and / or at least one ng-eNB 22.
  • the gNB 21 provides termination of the NR user plane and control plane protocols towards the UE 11.
  • Ng-eNB 22 provides termination of the E-UTRA user plane and control plane protocols towards UE 11.
  • 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 and ng-eNB are interconnected via an Xn interface.
  • gNB and ng-eNB 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.
  • 5 illustrates functional division between NG-RAN and 5GC.
  • gNB is an inter-cell radio resource management (Inter Cell RRM), radio bearer management (RB control), connection mobility control (Connection Mobility Control), radio admission control (Radio Admission Control), measurement settings and provision It can provide functions such as (Measurement configuration & Provision), dynamic resource allocation, and the like.
  • AMF can provide functions such as NAS security and idle state mobility processing.
  • UPF may provide functions such as mobility anchoring and PDU processing.
  • the Session Management Function (SMF) may provide functions such as terminal IP address allocation and PDU session control.
  • FIG. 6 illustrates a frame structure that can be applied in NR.
  • a frame may be composed of 10 ms (millisecond), and may include 10 subframes composed of 1 ms.
  • One or a plurality of slots may be included in a subframe according to subcarrier spacing.
  • Table 1 below illustrates the subcarrier spacing configuration ⁇ .
  • Table 2 shows the number of slots in a frame (N frame, ⁇ slot ), the number of slots in a subframe (N subframe, ⁇ slot ), and the number of symbols in a slot (N slot symb ) according to subcarrier spacing configuration ⁇ . And the like.
  • Table A5 illustrates that when an extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe are different according to SCS.
  • OFDM (A) numerology eg, SCS, CP length, etc.
  • a numerology eg, SCS, CP length, etc.
  • a (absolute time) section of a time resource eg, SF, slot, or TTI
  • a time unit TU
  • NR supports multiple numerology (or subcarrier spacing (SCS)) to support various 5G services. For example, if the SCS is 15 kHz, it supports a wide area in traditional cellular bands, and if the SCS is 30 kHz / 60 kHz, it is dense-urban, lower latency. And a wider carrier bandwidth, and when the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz is supported to overcome phase noise.
  • SCS subcarrier spacing
  • the NR frequency band can be defined as a frequency range of two types (FR1, FR2).
  • the numerical value of the frequency range can be changed, for example, the frequency ranges of the two types (FR1, FR2) may be as shown in Table A6 below.
  • FR1 may mean “sub 6GHz range” among the frequency ranges used in the NR system
  • FR2 may mean “above 6GHz range” and may be called millimeter wave (mmW). .
  • FR1 may include a band of 410MHz to 7125MHz as shown in Table A7 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher. For example, a frequency band of 6 GHz or higher (or 5850, 5900, 5925 MHz, etc.) included in FR1 may include an unlicensed band. The unlicensed band may be used for various purposes, for example, for communication for a vehicle (eg, autonomous driving).
  • a slot includes a plurality of symbols in the time domain. For example, in the case of a normal CP, one slot includes 14 symbols, but in the case of an extended CP, one slot may include 12 symbols. Alternatively, in the case of a normal CP, one slot includes 7 symbols, but in the case of an extended CP, one slot may include 6 symbols.
  • the carrier wave includes a plurality of subcarriers in the frequency domain.
  • a resource block (RB) may be defined as a plurality of (eg, 12) consecutive subcarriers in the frequency domain.
  • the BWP (Bandwidth Part) may be defined as a plurality of consecutive (P) RBs in the frequency domain, and may correspond to one numerology (eg, SCS, CP length, etc.).
  • the carrier may include up to N (eg, 5) BWPs. Data communication can be performed through an activated BWP.
  • Each element may be referred to as a resource element (RE) in the resource grid, and one complex symbol may be mapped.
  • RE resource element
  • a physical downlink control channel may be composed of one or more control channel elements (CCEs) as shown in Table 3 below.
  • CCEs control channel elements
  • the PDCCH may be transmitted through a resource composed of 1, 2, 4, 8 or 16 CCEs.
  • CCE is composed of six resource element groups (REGs), and one REG is composed of one resource block in the frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in the time domain.
  • REGs resource element groups
  • OFDM orthogonal frequency division multiplexing
  • a new unit called a control resource set can be introduced.
  • the terminal may receive the PDCCH in CORESET.
  • CORESET is composed of N CORESET RB resource blocks in the frequency domain and N CORESET symb ⁇ ⁇ 1, 2, 3 ⁇ symbols in the time domain.
  • N CORESET RB and N CORESET symb may be provided by a base station through a higher layer signal.
  • a plurality of CCEs (or REGs) may be included in CORESET.
  • the UE may attempt to detect PDCCH in units of 1, 2, 4, 8 or 16 CCEs in CORESET.
  • PDCCH candidates One or a plurality of CCEs capable of attempting PDCCH detection may be referred to as PDCCH candidates.
  • the terminal may receive a plurality of CORESETs.
  • 9 is a view showing a difference between a conventional control region and CORESET in NR.
  • the control area 300 in a conventional wireless communication system (eg, LTE / LTE-A) is configured over the entire system band used by a base station. All terminals except for some terminals (for example, eMTC / NB-IoT terminals) supporting only a narrow band receive radio signals in the entire system band of the base station in order to properly receive / decode control information transmitted by the base station. I should be able to.
  • CORESET (301, 302, 303) may be referred to as a radio resource for control information that the terminal should receive, and may use only a part of the entire system band.
  • the base station can allocate CORESET to each terminal, and can transmit control information through the assigned CORESET.
  • the first CORESET 301 may be allocated to the terminal 1
  • the second CORESET 302 may be allocated to the second terminal
  • the third CORESET 303 may be allocated to the terminal 3.
  • the terminal in the NR can receive control information of the base station even if it does not necessarily receive the entire system band.
  • the CORESET there may be a terminal-specific CORESET for transmitting terminal-specific control information and a common CORESET for transmitting control information common to all terminals.
  • the resource may include at least one of a resource in the time domain, a resource in the frequency domain, a resource in the code domain, and a resource in the spatial domain.
  • FIG. 10 shows an example of a frame structure for a new radio access technology.
  • a structure in which a control channel and a data channel are time-division multiplexed (TDM) within one TTI is considered as one of the frame structures as shown in FIG. 10 for the purpose of minimizing latency. Can be.
  • TDM time-division multiplexed
  • the hatched area indicates a downlink control area, and the black part indicates an uplink control area.
  • An area without an indication may be used for downlink data (DL data) transmission, or may be used for uplink data (UL data) transmission.
  • the characteristic of this structure is that downlink (DL) transmission and uplink (UL) transmission are sequentially performed in one subframe, DL data is transmitted in a subframe, and UL ACK / NACK (Acknowledgement / Not-acknowledgement) is also available. As a result, when a data transmission error occurs, it takes less time to retransmit the data, thereby minimizing latency of the final data transmission.
  • the base station and the terminal type gap (time gap) for the process of switching from the transmission mode to the receiving mode or the switching process from the receiving mode to the transmission mode ) Is required.
  • some OFDM symbols at a time point of switching from DL to UL may be set as a guard period (GP).
  • the wavelength is shortened, so that it is possible to install multiple antenna elements in the same area. That is, in the 30 GHz band, the wavelength is 1 cm, and a total of 100 antenna elements can be installed in a 2-dimensional arrangement at 0.5 wavelength intervals on a 5 by 5 cm panel. Therefore, in mmW, a plurality of antenna elements are used to increase beamforming (BF) gain to increase coverage or increase throughput.
  • BF beamforming
  • TXRU Transceiver Unit
  • hybrid beamforming having B TXRUs, which are fewer than Q antenna elements, in the form of intermediate between digital beamforming (digital BF) and analog beamforming (analog BF).
  • digital BF digital beamforming
  • analog BF analog beamforming
  • the analog beamforming (or RF beamforming) performs precoding (or combining) at the RF stage, and thus, the number of RF chains and the number of D / A (or A / D) converters are performed. It has the advantage of being able to achieve performance close to digital beamforming while reducing.
  • the hybrid beamforming structure may be represented by N TXRUs and M physical antennas.
  • digital beamforming for the L data layers to be transmitted by the transmitting end can be represented by an N by L matrix, and then the converted N digital signals are converted into analog signals through TXRU. After conversion, analog beamforming represented by an M by N matrix is applied.
  • 11 is an abstract diagram of a hybrid beamforming structure from the perspective of the TXRU and the physical antenna.
  • the number of digital beams is L, and the number of analog beams is N.
  • the base station is designed to change the analog beamforming on a symbol-by-symbol basis, and considers a direction for supporting more efficient beamforming to terminals located in a specific region. Further, when defining a specific N TXRU and M RF antennas as one antenna panel in FIG. 11, the NR system considers a method of introducing a plurality of antenna panels to which hybrid beamforming independent of each other is applicable. Is becoming.
  • a specific subframe is at least for a synchronization signal, system information, and paging.
  • a beam sweeping operation is being considered in which a plurality of analog beams to be applied by a base station is changed for each symbol so that all terminals have a reception opportunity.
  • FIG. 12 shows a synchronization signal and a PBCH (SS / PBCH) block.
  • the SS / PBCH block spans PSS and SSS, which occupy 1 symbol and 127 subcarriers, and 3 OFDM symbols and 240 subcarriers, respectively, but an unused portion for SSS is interposed on one symbol. It consists of the remaining PBCH.
  • the periodicity of the SS / PBCH block can be set by the network, and the time position in which the SS / PBCH block can be transmitted can be determined by the subcarrier spacing.
  • polar coding may be used.
  • the UE may assume a band-specific subcarrier interval for the SS / PBCH block unless the network sets the UE to assume a different subcarrier interval.
  • PBCH symbols carry their frequency-multiplexed DMRS.
  • QPSK modulation can be used for PBCH.
  • 1008 unique physical layer cell IDs may be given.
  • the first symbol indices for candidate SS / PBCH blocks are determined according to the subcarrier spacing of SS / PBCH blocks described later.
  • n 0, 1.
  • n 0, 1, 2, 3.
  • n 0.
  • n 0 and 1.
  • n 0, 1.
  • n 0, 1, 2, 3.
  • n 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18.
  • n 0, 1, 2, 3, 5, 6, 7, 8.
  • the candidate SS / PBCH blocks in the half frame are indexed in ascending order from 0 to L-1 on the time axis.
  • an index of SS / PBCH blocks in which the UE cannot receive other signals or channels in REs overlapping REs corresponding to SS / PBCH blocks is set. Can be.
  • SS / PBCH blocks have an index of SS / PBCH blocks per serving cell that cannot receive other signals or channels in REs overlapping REs corresponding to the SS / PBCH blocks. Can be set.
  • the setting by 'SSB-transmitted' may take priority over the setting by 'SSB-transmitted-SIB1'.
  • the periodicity of the half frame for reception of SS / PBCH blocks per serving cell may be set by the upper layer parameter 'SSB-periodicityServingCell'. If the UE does not receive the periodicity of the half frame for reception of SS / PBCH blocks, the UE should assume the periodicity of the half frame. The UE may assume that periodicity is the same for all SS / PBCH blocks in the serving cell.
  • 13 is for explaining a method for a terminal to obtain timing information.
  • the terminal can obtain 6-bit SFN information through a Master Information Block (MIB) received in the PBCH.
  • MIB Master Information Block
  • the terminal can obtain a 1-bit half frame indicator as part of the PBCH payload.
  • the terminal can obtain the SS / PBCH block index by DMRS sequence and PBCH payload. That is, the LSB 3 bits of the SS block index can be obtained by the DMRS sequence for a period of 5 ms. Also, MSB 3 bits of timing information are explicitly carried in the PBCH payload (for more than 6 GHz).
  • the UE may assume that a half frame with SS / PBCH blocks occurs with a periodicity of 2 frames. If it detects the SS / PBCH block, the terminal, and if the k for the FR1 and SSB ⁇ 23 ⁇ 11 SSB and k for FR2, Type0-PDCCH common search space (common search space) is determined that the present controlled set of resources for do. The UE determines that if k SSB > 23 for FR1 and k SSB > 11 for FR2, there is no control resource set for the Type0-PDCCH common search space.
  • the UE For a serving cell without transmission of SS / PBCH blocks, the UE performs time and frequency synchronization of the serving cell based on reception of SS / PBCH blocks on a primary cell of a cell group or a primary SCell (PSCell) for a serving cell.
  • PSCell refers to a cell having a UL CC in which PUCCH resources are configured in a secondary cell group (SCG).
  • SI System information
  • MIB MasterInformationBlock
  • SIBs SystemInformationBlocks
  • -MIB has a period of 80ms and is always transmitted on the BCH and repeated within 80ms, and includes parameters necessary to obtain SystemInformationBlockType1 (SIB1) from the cell;
  • SIB1 is transmitted on a DL-SCH with periodicity and repetition.
  • SIB1 includes information about availability and scheduling of other SIBs (eg, periodicity, SI-window size). It also indicates whether these (ie, other SIBs) are provided on a periodic broadcast basis or on demand. If other SIBs are provided by request, SIB1 includes information for the UE to perform SI request;
  • SIBs other than SIB1 are carried as a SystemInformation (SI) message transmitted on the DL-SCH.
  • SI SystemInformation
  • Each SI message is transmitted within a periodic time domain window (called an SI-window);
  • the RAN provides the necessary SI by dedicated signaling. Nevertheless, the UE must acquire the MIB of the PSCell in order to obtain the SFN timing of the SCH (which may be different from the MCG).
  • the RAN releases and adds the relevant secondary cell.
  • SI can only be changed with Reconfiguration with Sync.
  • FIG. 14 shows an example of a system information acquisition process of a terminal.
  • the terminal may receive MIB from the network, and then receive SIB1. Thereafter, the terminal may transmit a system information request to the network, and receive a SystemInformation message from the network in response thereto.
  • the UE may apply a system information acquisition procedure for acquiring AS (access stratum) and NAS (non-access stratum) information.
  • UEs in the RRC_IDLE and RRC_INACTIVE states must ensure (at least) MIB, SIB1 and SystemInformationBlockTypeX of valid versions (according to the relevant RAT support for mobility controlled by the terminal).
  • the UE in the RRC_CONNECTED state must ensure a valid version of MIB, SIB1, and SystemInformationBlockTypeX (according to mobility support for the relevant RAT).
  • the terminal should store the related SI obtained from the current camped / serving cell.
  • the version of the SI acquired and stored by the terminal is valid only for a certain period of time.
  • the terminal may use this stored version of SI after, for example, cell reselection, return from out of coverage, or after system information change instruction.
  • the random access procedure of the terminal can be summarized as shown in Table 4 below.
  • the UE may transmit a PRACH preamble in uplink as Msg 1 of a random access procedure.
  • Random access preamble sequences having two different lengths are supported.
  • Long sequences of length 839 apply to subcarrier spacing of 1.25 kHz and 5 kHz, and short sequences of length 139 apply to subcarrier spacing of 15, 30, 60, and 120 kHz.
  • Long sequences support an unrestricted set and limited sets of type A and type B, while short sequences support only an unrestricted set.
  • a plurality of RACH preamble formats are defined by one or more RACH OFDM symbols, different cyclic prefix (CP), and guard time.
  • the PRACH preamble setting to be used is provided to the terminal as system information.
  • the UE may retransmit the power ramped PRACH preamble within a prescribed number of times.
  • the UE calculates the PRACH transmission power for retransmission of the preamble based on the most recent estimated path loss and power ramping counter. If the terminal performs beam switching, the power ramping counter does not change.
  • 16 is for explaining a power ramping car circle.
  • the UE may perform power ramping for retransmission of the random access preamble based on the power ramping counter.
  • the power ramping counter does not change when the terminal performs beam switching during PRACH retransmission.
  • the UE when the UE retransmits the random access preamble for the same beam, such as when the power ramping counter increases from 1 to 2 and 3 to 4, the UE increments the power ramping counter by one. However, when the beam is changed, the power ramping counter does not change when the PRACH is retransmitted.
  • 17 is for explaining the concept of the threshold of the SS block for the RACH resource relationship.
  • the system information informs the UE of the relationship between SS blocks and RACH resources.
  • the threshold of the SS block for the RACH resource relationship is based on RSRP and network configuration.
  • the transmission or retransmission of the RACH preamble is based on an SS block that satisfies the threshold. Therefore, in the example of FIG. 17, since the SS block m exceeds the threshold of the received power, the RACH preamble is transmitted or retransmitted based on the SS block m.
  • the DL-SCH may provide timing arrangement information, an RA-preamble ID, an initial uplink grant, and a temporary C-RNTI.
  • the UE may perform uplink transmission on the UL-SCH as Msg3 of the random access procedure.
  • Msg3 may include an RRC connection request and a UE identifier.
  • the network may transmit Msg4, which can be treated as a contention resolution message, in a downlink.
  • Msg4 can be treated as a contention resolution message
  • ⁇ up to 400 megahertz (MHz) per component carrier (CC) can be supported.
  • the terminal operating in such a wideband CC is always operated with RF on the entire CC, the battery consumption of the terminal may increase.
  • different numerology for each frequency band within the CC eg, subcarrier spacing (sub -carrier spacing (SCS)
  • SCS sub -carrier spacing
  • capacities for the maximum bandwidth may be different for each terminal.
  • the base station may instruct the terminal to operate only in a partial bandwidth, not the entire bandwidth of the broadband CC, and for convenience, the partial bandwidth is defined as a bandwidth part (BWP).
  • the BWP may be composed of continuous resource blocks (RBs) on a frequency axis, and one neurology (eg, subcarrier spacing, CP (cyclic prefix) length, slot / mini-slot) Duration, etc.).
  • the base station may set multiple BWPs even within one CC set for the terminal. For example, in a PDCCH monitoring slot, a BWP occupying a relatively small frequency domain is set, and a PDSCH indicated by the PDCCH can be scheduled on a larger BWP.
  • some terminals may be set as different BWPs for load balancing.
  • some spectrums of the entire bandwidth may be excluded and both BWPs may be set in the same slot in consideration of frequency domain inter-cell interference cancellation between neighboring cells.
  • the base station may set at least one DL / UL BWP to a terminal associated with a wideband CC, and set at least one DL / UL BWP among DL / UL BWP (s) set at a specific time.
  • Activation by L1 signaling or MAC CE or RRC signaling, etc.
  • switching to another set DL / UL BWP by L1 signaling or MAC CE or RRC signaling, etc.
  • timer based timer When the value expires, it may be switched to a predetermined DL / UL BWP.
  • the activated DL / UL BWP is defined as an active DL / UL BWP.
  • the terminal assumes DL / UL BWP is defined as initial active DL / UL BWP.
  • IAB integrated access and backhaul
  • One of the potential technologies that will enable future cellular network deployment scenarios and applications is to flexibly and densely deploy NR cells without overcrowding the transport network by supporting wireless backhaul / relay links.
  • Massive MIMO or multi-beam systems can be basically used / deployed in NR, and the bandwidth expected to be used in NR is greater than LTE. Accordingly, an integrated access and backhaul (IAB) link is required, which allows the establishment of multiple control and data channels / procedures defined to provide access to the terminal.
  • IAB integrated access and backhaul
  • resources allocated for transmitting an uplink signal to the first node by the first terminal in the same time and in the same frequency band are resources for the uplink (U), and the second terminal receives the downlink signal from the second node.
  • the resource allocated to receive is a resource for downlink (D).
  • an uplink signal transmitted using the resource allocated by the first terminal may act as interference in the resource allocated by the second terminal.
  • the resource direction can be defined to minimize the interference between nodes / terminals, the stability and performance of the IAB system can be further guaranteed.
  • IAB integrated access and backhaul
  • the radio link between the terminal 191 and the relay node or the base station node 192 may be referred to as an access link, and the radio link between the relay node or the base station node 192 and another relay node or base station node 193 may be referred to as a backhaul link.
  • At least one base station node or relay node may be connected to the core network by wire.
  • the access link and the backhaul link may use the same frequency band, or different frequency bands.
  • the IAB node can be said to be similar to the terminal in relation to the parent node, and from the viewpoint of the IAB node, the parent node can be viewed from a mobile terminal (MT) perspective.
  • MT mobile terminal
  • the IAB node can be said to be similar to a distributed unit (DU) such as a base station or a repeater in relation to a child node, and it is said that the child node can be viewed from the perspective of a distributed unit (DU) in terms of the IAB node.
  • DU distributed unit
  • DU distributed unit
  • link can be used interchangeably with the term 'connection'.
  • node A may check / determine the link status (A105, B105). As an example, node A may check a connection with a child node / terminal. Node A can check the connection with the parent / donor node.
  • Node A may provide information about the link status of the parent / donor node to the child node / terminal (A110) or Node A may provide information about the link status of the parent / donor node to the parent / donor node. (B110).
  • the information on the link state may be, for example, information on link loss, information on link unstableness, or information on resolving link unstableness, but is not limited thereto.
  • the child node / terminal, node A and / or parent / donor node may perform procedures related to link management, respectively, as described below (A120, B120). For example, if necessary, node A may perform a link recovery procedure. If necessary, the child node / terminal may perform a link recovery procedure.
  • a node A loses a connection with its parent node in a situation where a connection is made with a child node or a UE.
  • the node A must quickly attempt to connect to another node (for example, A120 in FIG. 20), and at the same time, may inform the child node and the terminal of this connection loss (for example, A110 in FIG. 20).
  • the lower child node and the terminal may also perform their own connection recovery (eg, A120 in FIG. 20), and a trigger signal from node A may be required to perform the connection recovery operation between the child node and the terminal. .
  • the node A has lost connection with the lower child node or the terminal.
  • it is necessary to notify the parent node or the donor node of this fact for example, B110 in FIG. 20.
  • the parent / donor node can allocate resources for the child node or terminal of node A differently (eg, B120 in FIG. 20).
  • the link may be determined whether the link is lost (link lost) according to the criteria described in the present disclosure (eg, A105, B105 in FIG. 20).
  • the node A may signal the corresponding child node and the terminals to lose the corresponding link (eg, A110 in FIG. 20).
  • the node A may signal to the parent node that the link is lost (for example, B110 in FIG. 20).
  • FIG. 20 may be applied to the examples described below, but the embodiments described below are not limited to only being illustrated in FIG. 20.
  • a terminal or an IAB child node may report a link to its parent node by measuring the link with its parent node. At this time, the parent node may notify the child node of the report when and what to do. In addition, it is possible to perform link management on its own. If the condition of link failure is satisfied, the timer related to link failure is started, and if it is not possible to determine that the link has been restored within the timer, link failure is declared. To perform the operation to establish (establish) another link.
  • a T310 timer is triggered, and if an in-sync of N311 within T310 succeeds, T310 is stopped. If the sync match of N311 within T310 is not successful, it is possible to declare a radio link failure itself and re-establish another link.
  • the child node may separately perform beam management for the beam used when establishing a link with the parent node.
  • radio link management and beam management are operated by separate procedures, and beam management cannot directly affect radio link management.
  • the link is fast. It may be desirable to perform a recovery operation (eg, handover or link re-establishment).
  • the behavior of the IAB node is defined to perform the link recovery operation even when the beam state is unstable or a beam failure occurs, it may help to maintain good link quality.
  • the following options can be considered in this regard.
  • Option 1-1 When a beam failure occurs for one beam of the parent node, the IAB node may determine that a radio link failure has occurred.
  • Option 1-2 If even one beam of the parent node fails, the IAB node triggers the T310 timer, and if the beam recovery is not completed within T310, it may be determined that a radio link failure has occurred. When the beam recovery is completed in T310, the T310 timer is ended.
  • Option 2-1 When a beam failure occurs for all beams of the parent node, the IAB node may determine that a radio link failure has occurred.
  • Option 2-2 When a beam failure occurs for all beams of the parent node, the IAB node triggers a T310 timer, and if beam recovery is not completed within T310, it may be determined that a radio link failure has occurred. When the beam recovery is completed in T310, the T310 timer is ended.
  • the subsequent operation may follow the operation defined in the standard specification, or perform cell (node) -search, IA attempt to a new node, and the like.
  • the parent node may assist the beam management operation of the child node.
  • the child node may help to maintain the link quality at an appropriate level when performing the measurement of the beam of the other node as well as the measurement of the beam of the currently connected parent node.
  • the quality of the entire beam with the current parent node falls below a certain level, it may be advantageous to move to another parent node.
  • the child node converts the link to the node itself, or the current parent node handovers the node to the child node. I can order.
  • Information that the parent node can inform its child node may include at least one of the following.
  • Information 1 Transmission beam setting information of neighboring nodes. It can inform the setting information for all or part of the beam.
  • Information 2 Cell ID of the node. Not only the beam setting of the node but also the cell ID of the node must be informed so that it is possible to know which node the beam is from. The information may be received directly from the node by the parent node, or may be transmitted from a donor node or its parent node.
  • the child node After the child node receives the information from its parent node, it can again inform the parent node of at least one of the following information.
  • the parent node can inform the child node about the setting of its own beam, and selectively transmit the setting for beams of other nodes that can reach the child node.
  • the parent node may receive beam setting information of nodes around its own or around a child node from the nodes or its parent node or donor node. All of the beam configuration information may be transmitted to the child node by the parent node. However, beam setting information may be selectively provided for effective child node measurement.
  • beam setting information of another node that the parent node can provide may be provided by at least one of the following options.
  • Option 1 For nodes having beams that a child node can receive, among the beams of each node, configuration information for each beam that is expected to have the best performance for the child node may be transmitted to the child node.
  • Option 2 Among the beams of all nodes, for nodes having a beam that the child node can receive, the setting information for one beam that is expected to have the best performance for the child node may be transmitted to the child node.
  • beam setting information of each node may be transmitted to the child nodes at once.
  • the beam information that can be received by the child node may be determined based on the measurement result that each of the conventional nodes has reported from the child node, and may inform the parent node. In this case, not only beam setting information, but also priority information for each beam or average measurement information for each beam may be delivered to each node to the parent node.
  • the parent node receives a measurement report from the child node for beams of other nodes that have been delivered to the child node, and when the beam measurement result exceeds a proper threshold, the parent node commands to report the measurement for the same beam without changing the beam information. can do.
  • measurement information for all beams may be sequentially received while sequentially transmitting configuration information for all beams that can be transmitted.
  • the threshold may be determined by a standard specification or RRC / higher layer signaling.
  • the child node receiving the beam setting information from the parent node may inform the preferences of the beams. If the parent node is not specifically commanded to report on some beams (for example, option 3 in 3.2.1 described above), the child node may select a beam that is good for itself and deliver it to the parent node. At this time, it may be based on at least one of the following options.
  • Option 1 The reference signal (RS) ID and measurement report (eg, L1-RSRP) of the N preferred beams among all the received beams (regardless of which node is the beam) may be notified to the parent node.
  • RS reference signal
  • L1-RSRP measurement report
  • the RS ID and measurement report (eg, L1-RSRP) of N preferred beams may be notified to the parent node.
  • N for each node may be different.
  • N may be determined by a standard specification or RRC / higher layer signaling.
  • the base station may inform the UE to be triggered periodically or according to an event for measurement reporting such as a serving cell / neighbor cell / Pcell / PScell / Scell to be performed by the UE.
  • the terminal When the terminal periodically reports to the base station, it may be based on a semi-static measurement reporting process. When reporting is triggered according to an event, it may affect the measurement reporting process and the base station may perform handover or perform any link recovery-related operation according to the reported value.
  • a terminal reporting triggering event may be used. If the event conditions for the link status are designed to be more suitable for the IAB environment, the measurement reporting process can be effectively operated.
  • 21 illustrates a method for reporting a measurement of a device in a wireless communication system.
  • the apparatus identifies whether a predetermined condition is satisfied for at least one of beams transmitted by the serving cell (S1210). When the condition is satisfied, the measurement result for the specific cell set to the device is reported to the serving cell (S1220).
  • the device may be a terminal or an IAB node.
  • the transmission configuration indication (hereinafter referred to as TCI) state may be set for each core set of a control channel, and may be used as a parameter for determining a reception (Rx) beam of a terminal / IAB node (hereinafter, a terminal).
  • the UE For each DL BWP (bandwidth part) of the serving cell, the UE may be configured with three or fewer core sets. In addition, the terminal may receive the following information for each core set.
  • Coreset index p one of 0 to 11, the index of each coreset in BWPs of one serving cell can be uniquely determined
  • TCI transmission configuration indication
  • the 'TCI-State' parameter / information element associates one or two downlink reference signals with corresponding QCL types (there are QCL types A, B, C, and D, see Table 5).
  • Each 'TCI-State' may include a parameter for establishing a quasi-co-location relationship between one or two downlink reference signals and a DM-RS port of PDSCH / PDCCH.
  • the following table is an example of the 'TCI-State' information element (IE).
  • 'bwp-Id' indicates the DL BWP in which the reference signal RS is located.
  • 'cell' indicates the serving cell of the terminal to which the reference signal is set. If this field is not present, TCI-State is applied to the serving cell.
  • the reference signal may be located in a serving cell other than the serving cell in which TCI-State is set only when qcl-Type is configured as typeC or typeD.
  • the 'referenceSignal' indicates a reference signal provided with quasi-co location information.
  • 'qcl-Type' may indicate at least one of QCL-Types in Table 5 above.
  • the beam may be determined based on the TCI state.
  • an environment using multiple beams can be considered.
  • Beam management (BM) and measurement reporting are performed independently, and it is highly likely that link quality will be finally determined according to the state of the beam. If an event is set by using the state of the beam derived from the beam management process, it can help to effectively operate the measurement reporting process.
  • the following options can be considered as event conditions. That is, the condition of FIG. 21 may be at least one of the following options.
  • Option 1 When 'Condition X' (Fail beam) occurs in the currently used beam of the serving cell (or PCell or PSCell). That is, when the condition X is satisfied in the beam currently being used for communication with the serving cell, the measurement result may be reported to the serving cell.
  • N may be determined by a standard specification or RRC / higher layer signaling. That is, when the condition X is satisfied in N (N is a natural number) beams transmitted by the serving cell, the measurement result is reported to the serving cell, but the N value can be set from the serving cell.
  • Option 3 When 'condition X' occurs in the beam corresponding to x% of the total beams of the serving cell (or PCell or PSCell).
  • x may be determined by a standard specification or RRC / higher layer signaling. That is, when the condition X is satisfied in the beams of x% among the beams transmitted by the serving cell, the measurement result is reported to the serving cell, but the x value can be set from the serving cell.
  • Option 4 When 'Condition X' occurs for all beams of the serving cell (or PCell or PSCell). That is, when the condition X is satisfied in all beams transmitted by the serving cell, the measurement result may be reported to the serving cell. In this case, since it may not be able to report to the current serving cell, it can be applied in an environment of carrier aggregation (CA) or dual connectivity.
  • CA carrier aggregation
  • Option 5 If there is only one available beam of a serving cell (or PCell or PSCell) or all other beams have failed and only one available beam remains, the measurement result may be reported to the serving cell.
  • the measurement result may be reported to the serving cell.
  • the above-mentioned 'Condition X' may be 1) when a beam failure instance occurs once or k times, and k may be determined by a standard specification or RRC / higher layer signaling. 2) A beam failure may have occurred. Or 3) a beam failure declaration may have been made.
  • the Reporting may be triggered according to at least one of the above-described options, and the reported value may be RSRP, RSRQ, SNR (SINR), and the like. That is, in FIG. 21, the measurement results include RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), SNR (Signal-to-noise ratio), and SINR (based on the signal transmitted by the specific cell). Signal-to-Interference-plus-Noise Ratio).
  • the specific cell may be at least one cell among the serving cell, neighboring cell, primary cell, secondary cell, and primary secondary cell.
  • FIG. 22 shows a specific example of applying the method of FIG. 21.
  • the serving cell provides configuration information for measurement report based on beam-related conditions to node A (S221).
  • the setting information is information on which one of the above-described options 1 to 6 is used, and / or values that the serving cell should set in the options, for example, at least one of the N, x, and k values It may include.
  • the serving cell may transmit a signal using a specific beam among a plurality of beams (S222).
  • Node A identifies whether a predetermined condition has occurred in the specific beam (S223). For example, when the setting information indicates that option 1 is used, it may be identified whether the condition is satisfied in the beam currently being used for communication with the serving cell. Alternatively, when option 3 is used for setting information and informs the value of x, it may be identified whether the condition is satisfied in beams of x% among beams transmitted by the serving cell.
  • the node A may receive, for example, a reference signal (S224) transmitted by a neighbor cell and perform RRM measurement based on the reference signal (S225).
  • S224 a reference signal transmitted by a neighbor cell
  • S225 the reference signal
  • the node A can report the measurement result to the serving cell.
  • the serving cell may be a primary cell or a primary secondary cell.
  • the NR RRM may support RSRP reporting per cell reporting an average value of RSRP for various beams through a specific quality threshold and RSRP reporting per beam reporting a measurement result of each beam through a specific quality threshold.
  • beam recovery may not be successful when a beam failure occurs.
  • the recovery procedure may follow one or more of the following.
  • Case 1 When a beam failure declaration occurs, beam failure recovery may be attempted. At this time, beam failure recovery may fail due to a lack of a best beam. Then, RLF can be declared and cell reselection can be attempted.
  • Case 2 During the case 1, if the serving cell quality deteriorates, event-triggering of RRM reporting may occur. Depending on the RRM measurement result, the parent node may attempt handover. If all beams for the current serving cell fail, RRM reporting may fail.
  • Case 2 may not work.
  • the current serving cell may trigger RRM reporting for each beam. Based on the RRM report per beam, the serving cell can estimate whether the UE needs handover to recover from the beam failure (for example, only one or a few beams are of good quality in the serving cell) On the other hand, better beams are available in neighboring cells). In such a case, the serving cell may also set the beam management reference signal of the neighboring cell or the beam recovery reference signal including the beam of the neighboring cell. When beam recovery through the beam of the neighboring cell is required, the IAB node may start handover to the neighboring cell using the 'PRACH resource set for beam recovery' of the neighboring cell.
  • the beam failure / recovery procedure may eventually lead to radio link failure (RLF).
  • RLF radio link failure
  • the operations defined as the behavior of the child node may operate in the same IAB level terminal.
  • the operations defined as the behavior of the terminal may operate the same child node of the same IAB level.
  • actions defined as child node / terminal actions for the proposed actions may also operate in the same way as the parent node for the signal triggering the corresponding action.
  • actions defined as parent node actions may operate in the same way as a child node / terminal for a signal triggering the action.
  • examples of the proposed method may be included as one of implementation methods of the present disclosure, and thus can be regarded as a kind of proposed methods.
  • the proposed schemes may be implemented independently, but may be implemented in a combination (or merge) form of some proposal schemes.
  • the rule may be defined such that information on whether to apply the proposed methods (or information on the rules of the proposed methods) is notified by the base station to a terminal through a predefined signal (eg, a physical layer signal or a higher layer signal).
  • the node device may be a child node, a node A, a parent node, or a donor node, but is not limited thereto.
  • the node device may include at least one of a transceiver, a processor, and a memory.
  • the transceiver may include a radio frequency (RF) interface for wireless communication, and the processor may control / use the RF interface for communication with the terminal.
  • the transceiver may include a (wired / wireless) backhaul interface, and the processor may control / use the backhaul interface for communication with other nodes.
  • 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. ⁇ .
  • the first wireless device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108.
  • the processor 102 controls the memory 104 and / or transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein.
  • the processor 102 may process information in the memory 104 to generate 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.
  • the memory 104 is an instruction to perform some or all of the processes controlled by the processor 102, or to perform the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. You can store software code that includes
  • 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.
  • the wireless device may mean a communication modem / circuit / chip.
  • the second wireless device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208.
  • Processor 202 controls memory 204 and / or transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein.
  • 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.
  • the memory 204 is an instruction to perform some or all of the processes controlled by the processor 202, or to perform the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. You can store software code that includes
  • 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.
  • Transceiver 206 may include a transmitter and / or receiver.
  • Transceiver 206 may be mixed with an 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 implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP).
  • the one or more processors 102 and 202 may include 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 be created.
  • 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 generate signals (eg, baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, suggestions and / or methods disclosed herein. , 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 descriptions, functions, procedures, suggestions, methods and / or operational flow diagrams disclosed herein PDUs, SDUs, messages, control information, data or information may be obtained according to the fields.
  • signals eg, baseband signals
  • One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer.
  • the one or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof.
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • DSPDs Digital Signal Processing Devices
  • PLDs Programmable Logic Devices
  • FPGAs Field Programmable Gate Arrays
  • Descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and firmware or software may be implemented to include modules, procedures, functions, and the like.
  • the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein are either firmware or software set to perform or are stored 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 can be implemented using firmware or software in the form of code, instructions and / or instructions.
  • 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 be comprised of ROM, RAM, EPROM, flash memory, hard drive, register, cache memory, computer readable storage medium and / or combinations thereof.
  • 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 and 206 may transmit user data, control information, radio signals / channels, and the like referred to in the methods and / or operational flowcharts of the present document 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 can control one or more transceivers 106, 206 to transmit user data, control information, or wireless signals to one or more other devices. Additionally, the one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or wireless signals from one or more other devices. In addition, one or more transceivers 106, 206 may be coupled to one or more antennas 108, 208, and one or more transceivers 106, 206 may be described, functions described herein through one or more antennas 108, 208.
  • the one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
  • the one or more transceivers 106 and 206 process the received user data, control information, radio signals / channels, etc. using one or more processors 102, 202, and receive radio signals / channels from the RF band signal. It can be converted 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.
  • 25 illustrates a signal processing circuit for a transmission signal.
  • the signal processing circuit 1000 may include 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. 25 may be performed in processors 102, 202 and / or transceivers 106, 206 of FIG.
  • the hardware elements of FIG. 25 can be implemented in the processors 102, 202 and / or transceivers 106, 206 of FIG. 24.
  • blocks 1010 to 1060 may be implemented in processors 102 and 202 of FIG. 24.
  • blocks 1010 to 1050 may be implemented in the processors 102 and 202 of FIG. 24, and block 1060 may be implemented in the transceivers 106 and 206 of FIG. 24.
  • the codeword may be converted into a wireless signal through the signal processing circuit 1000 of FIG. 25.
  • the codeword is an encoded bit sequence of an information block.
  • the information block may include a transport block (eg, UL-SCH transport block, DL-SCH transport block).
  • the radio signal may be transmitted through various physical channels (eg, PUSCH, PDSCH).
  • the codeword may be converted into a scrambled bit sequence by the scrambler 1010.
  • the scramble sequence used for scramble is 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 method 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 may perform precoding after performing transform precoding (eg, DFT transformation) on complex modulation symbols. Further, the precoder 1040 may perform precoding without performing transform precoding.
  • the resource mapper 1050 may map modulation symbols of each antenna port to time-frequency resources.
  • the time-frequency resource may include a plurality of symbols (eg, CP-OFDMA symbol, DFT-s-OFDMA symbol) in the time domain and a plurality of subcarriers in the frequency domain.
  • 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 Cyclic Prefix (CP) inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, etc. .
  • IFFT Inverse Fast Fourier Transform
  • CP Cyclic Prefix
  • 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. 25.
  • a wireless device eg, 100 and 200 in FIG. 24
  • 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 a CP remover
  • FFT Fast Fourier Transform
  • the baseband signal may be restored to a codeword through a resource de-mapper process, a postcoding process, a demodulation process, and a de-scramble process.
  • the codeword can be restored to the original information block through decoding.
  • the signal processing circuit (not shown) for the received signal may include a signal restorer, a resource de-mapper, a post coder, a demodulator, a de-scrambler and a decoder.
  • 26 illustrates a portable device applied to the present disclosure.
  • the portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), and a portable computer (eg, a notebook).
  • the mobile device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).
  • MS mobile station
  • UT user terminal
  • MSS mobile subscriber station
  • SS subscriber station
  • AMS advanced mobile station
  • WT wireless terminal
  • the 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 correspond to blocks 110 to 130/140 in FIG. 29, respectively.
  • the communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations.
  • the control unit 120 may perform various operations by controlling components of the portable device 100.
  • the controller 120 may include an application processor (AP).
  • the memory unit 130 may store data / parameters / programs / codes / 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 connection between the mobile device 100 and other external devices.
  • the interface unit 140b may include various ports (eg, audio input / output ports, video input / output ports) for connection with external devices.
  • the input / output unit 140c may receive or output image information / signal, audio information / signal, data, and / or information input from a user.
  • the input / output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and / or a haptic module.
  • the input / output unit 140c acquires information / signal (eg, touch, text, voice, image, video) input from the user, and the obtained information / signal is transmitted to the memory unit 130 Can be saved.
  • 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. After the restored information / signal is stored in the memory unit 130, it can be output in various forms (eg, text, voice, image, video, heptic) through the input / output unit 140c.
  • various components such as a camera and a Universal Serial Bus (USB) port may be additionally included in the terminal.
  • the camera can be connected to a processor.
  • the channel coding technique may mainly include a low density parity check (LDPC) coding technique for data and a polar coding technique for control information.
  • LDPC low density parity check
  • the network / terminal may perform LDPC coding on PDSCH / PUSCH having two base graph (BG) support.
  • BG1 may be for a mother code rate 1/3
  • BG2 may be for a mother code rate 1/5.
  • coding techniques such as repetition coding / simpleplex coding / Reed-Muller coding can be supported.
  • the polar coding technique can be used when the control information has a length longer than 11 bits.
  • the mother code size may be 512
  • Polar coding techniques can be used for PBCH. This coding technique may be the same as that of the PDCCH.
  • LDPC code is defined as the product of (nk) null-space and n sparse parity check matrix H (null-space of a (nk) ⁇ n sparse parity check matrix H) (n, k) linear It is a linear block code.
  • LDPC codes applicable to some implementations of the present disclosure may be as follows.
  • 27 is an example of a parity check matrix represented by a protograph.
  • FIG. 27 shows a parity check matrix for an association relationship between a variable node and a check node, which is expressed as a prototype.
  • variable nodes associated with the check node c 1 are v 1 , v 2 , v 3 , v 4 , v 6 , v 7 , and the check node associated with the variable node v8 These are c 2 , c 3 , c 4 .
  • FIG. 28 (a) shows an example of a base module of the polar code
  • FIG. 28 (b) shows a base matrix
  • the polar code is known as a code capable of acquiring channel capacity in a binary-input discrete memoryless channel (B-DMC). That is, when the size N of the code block increases to infinity, channel capacity can be obtained.
  • B-DMC binary-input discrete memoryless channel
  • 29 schematically shows an example of the encoder operation of the polar code.
  • the encoder of the polar code can perform channel combining and channel division. Specifically, the encoder of the polar code may combine existing channels into one vector channel, or split one vector channel into a plurality of new channels.
  • existing channels may be uniform, and a plurality of new channels that divide one vector channel may be polarized.
  • Discontinuous reception refers to an operation mode in which a user equipment (user equipment) reduces battery consumption to allow a terminal to discontinuously receive a downlink channel. That is, the terminal set to DRX can reduce power consumption by discontinuously receiving the DL signal.
  • the DRX operation is performed within a DRX cycle indicating a time interval in which On Duration is periodically repeated.
  • the DRX cycle includes on duration and sleep duration (or chance of DRX).
  • On duration indicates a time interval during which the UE monitors the PDCCH to receive the PDCCH.
  • DRX may be performed in a Radio Resource Control (RRC) _IDLE state (or mode), RRC_INACTIVE state (or mode), or RRC_CONNECTED state (or mode).
  • RRC Radio Resource Control
  • DRX can be used to discontinuously receive the paging signal.
  • -RRC_IDLE state a state in which a radio connection (RRC connection) between a base station and a terminal is not established (established).
  • -RRC_INACTIVE state a radio connection (RRC connection) between the base station and the terminal is established, but the radio connection is deactivated.
  • -RRC_CONNECTED state A state in which a radio connection (RRC connection) is established between a base station and a terminal.
  • DRX can be basically divided into an idle mode DRX, a connected DRX (C-DRX), and an extended DRX.
  • DRX applied in the IDLE state may be referred to as an idle mode DRX, and DRX applied in a CONNECTED state may be referred to as a connected mode DRX (C-DRX).
  • C-DRX connected mode DRX
  • eDRX Extended / Enhanced DRX
  • eDRX Extended / Enhanced DRX
  • SIB1 system information
  • SIB1 may include an eDRX-allowed parameter.
  • the eDRX-allowed parameter is a parameter indicating whether idle mode extended DRX is allowed.
  • paging occasion is a PDCCH (Physical Downlink Control Channel) or a PDCCH (MTC PDCCH) in which a Paging-Radio Network Temporary Identifier (P-RNTI) addresses a paging message for NB-IoT. ) Or a subframe that can be transmitted through a narrowband PDCCH (NPDCCH).
  • PDCCH Physical Downlink Control Channel
  • MTC PDCCH Physical Downlink Control Channel
  • P-RNTI Paging-Radio Network Temporary Identifier
  • NPDCCH narrowband PDCCH
  • PO may indicate a start subframe of MPDCCH repetition.
  • the PO may indicate the start subframe of the NPDCCH repetition. Therefore, the first valid NB-IoT downlink subframe after PO is the start subframe of NPDCCH repetition.
  • One paging frame is one radio frame that may include one or more paging opportunities. When DRX is used, the UE only needs to monitor one PO per DRX cycle.
  • One paging narrow band is one narrow band in which the UE performs paging message reception. PF, PO and PNB may be determined based on DRX parameters provided in system information.
  • 30 is a flowchart illustrating an example of performing an idle mode DRX operation.
  • the terminal may receive idle mode DRX configuration information from the base station through higher layer signaling (eg, system information) (S21).
  • higher layer signaling eg, system information
  • the UE may determine a Paging Frame (PF) and a Paging Occasion (PO) to monitor the PDCCH in the paging DRX cycle based on the idle mode DRX configuration information (S22).
  • the DRX cycle may include on duration and sleep duration (or chance of DRX).
  • the UE may monitor the PDCCH in the PO of the determined PF (S23).
  • the UE monitors only one subframe (PO) per paging DRX cycle.
  • the UE receives a PDCCH scrambled by P-RNTI during on-duration (that is, when paging is detected)
  • the UE transitions to a connection mode and can transmit and receive data with the base station.
  • 31 schematically illustrates an example of an idle mode DRX operation.
  • paging for the terminal occurs.
  • the UE may monitor the PDCCH by waking up periodically (ie, every (paging) DRX cycle). If there is no paging, the terminal transitions to the connected state, receives data, and if data does not exist, may enter the sleep mode again.
  • C-DRX means DRX applied in an RRC connected state.
  • the DRX cycle of C-DRX may consist of a short DRX cycle and / or a long DRX cycle.
  • a short DRX cycle may be an option.
  • the UE may perform PDCCH monitoring for on duration. If the PDCCH is successfully detected during PDCCH monitoring, the UE may operate (or run) an inactive timer and maintain an awake state. Conversely, if the PDCCH is not successfully detected during the PDCCH monitoring, the UE may enter a sleep state after the on duration is over.
  • a PDCCH reception opportunity (eg, a slot having a PDCCH search space) may be set discontinuously based on the C-DRX setting.
  • a PDCCH reception opportunity (eg, a slot having a PDCCH search space) may be continuously set in the present disclosure.
  • PDCCH monitoring may be limited to a time interval set as a measurement gap regardless of C-DRX setting.
  • 32 is a flowchart showing an example of a method for performing a C-DRX operation.
  • the UE may receive RRC signaling (eg, MAC-MainConfig IE) including DRX configuration information from the base station (S31).
  • RRC signaling eg, MAC-MainConfig IE
  • S31 DRX configuration information
  • the DRX configuration information may include the following information.
  • -onDurationTimer Number of PDCCH subframes that can be continuously monitored at the beginning of the DRX cycle
  • -drx-InactivityTimer The number of PDCCH subframes that can be continuously monitored when the UE decodes the PDCCH having scheduling information
  • -drx-RetransmissionTimer The number of PDCCH subframes to be continuously monitored when HARQ retransmission is expected
  • DRX 'ON' is set through a DRX command of a MAC CE (command element) (S32)
  • the UE monitors the PDCCH for the ON duration of the DRX cycle based on the DRX setting (S33).
  • the UE may execute a DRX inactive timer and an RRC inactive timer.
  • scheduling information eg, DL Grant
  • RRC_CONNECTED state hereinafter, referred to as a connection state
  • the DRX mode may be started.
  • the UE wakes up from the DRX cycle and can monitor the PDCCH for a predetermined time (on a duration timer).
  • the terminal when a short DRX is set, when the UE starts the DRX mode, the UE first starts with a short DRX cycle, and the short DRX cycle ends and then starts with a long DRX cycle.
  • the long DRX cycle may correspond to a multiple of the short DRX cycle.
  • the terminal may wake up more frequently. After the RRC inactive timer expires, the terminal may switch to the IDLE state and perform the IDLE mode DRX operation.
  • the terminal after the terminal is powered on, the terminal performs a boot up for application loading, an initial access / random access procedure for downlink and uplink synchronization with the base station, and a registration procedure with the network. Perform.
  • the current consumed during each procedure (or power consumption) is shown in FIG. 33.
  • the terminal When the transmission power of the terminal is high, current consumption of the terminal may increase. In addition, if there is no traffic to be transmitted to the terminal or traffic to the base station, the terminal transitions to the idle mode to reduce power consumption, and the terminal performs an idle mode DRX operation.
  • the UE may transition from the idle mode to the connected mode through a cell establishment procedure and transmit and receive data with the base station.
  • paging eg, a call is generated
  • the terminal may perform the connection mode DRX (C-DRX).
  • the terminal when the terminal is set to eDRX (Extended DRX) through higher layer signaling (eg, system information), the terminal may perform an eDRX operation in an idle mode or a connected mode.
  • eDRX Extended DRX
  • higher layer signaling eg, system information
  • the wireless device may be implemented in various forms according to use-example / service.
  • the wireless devices 100 and 200 may be composed of various elements.
  • 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.
  • the communication circuit 112 can include one or more processors 102,202 and / or one or more memories 104,204.
  • the transceiver (s) 114 can include one or more transceivers 106,206 and / or one or more antennas 108,208.
  • the control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140, and controls various operations of the wireless device.
  • the controller 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130.
  • the control unit 120 transmits information stored in the memory unit 130 to the outside (eg, another communication device) through the wireless / wired interface through the communication unit 110, or externally (eg, through the communication unit 110) 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 wireless device.
  • the additional element 140 may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit.
  • wireless devices include robots (FIGS. 44, 100A), vehicles (FIGS. 44, 100B-1, 100B-2), XR devices (FIGS. 44, 100C), portable devices (FIGS. 44, 100D), and household appliances. (Fig. 44, 100e), IoT device (Fig.
  • 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 some of them may be connected wirelessly 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 and 140) are connected through 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 include a set of communication control processor, application processor, electronic control unit (ECU), graphic processing processor, and memory control processor.
  • memory unit 130 includes random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory (non- volatile memory) and / or combinations thereof.
  • the communication system 1 applied to the present disclosure 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 NR (New RAT), Long Term Evolution (LTE)), and may be referred to as a communication / wireless / 5G device.
  • a wireless access technology eg, 5G NR (New RAT), Long Term Evolution (LTE)
  • 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 Thing (IoT) device 100f, and an AI device / server 400.
  • IoT Internet of Thing
  • 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 a UAV (Unmanned Aerial Vehicle) (eg, a drone).
  • XR devices include Augmented Reality (AR) / Virtual Reality (VR) / Mixed Reality (MR) devices, Head-Mounted Device (HMD), Head-Up Display (HUD) provided in vehicles, televisions, smartphones, It may be implemented in the form of a computer, wearable device, home appliance, digital signage, vehicle, robot, or the like.
  • the mobile 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.
  • the base station and the network may also be implemented as wireless devices, and 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 Artificial Intelligence
  • the network 300 may be configured using a 3G network, a 4G (eg, LTE) network, or a 5G (eg, NR) network.
  • the wireless devices 100a to 100f may communicate with each other through the base station 200 / network 300, but may directly communicate (e.g. sidelink communication) without going through the base station / network.
  • the vehicles 100b-1 and 100b-2 may perform direct communication (e.g. 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 may be achieved between the wireless devices 100a to 100f / base station 200 and the base station 200 / base station 200.
  • the wireless communication / connection is various wireless access such as uplink / downlink communication 150a and sidelink communication 150b (or D2D communication), base station communication 150c (eg relay, IAB (Integrated Access Backhaul)). It can be achieved through technology (eg, 5G NR), and wireless devices / base stations / wireless devices, base stations and base stations can transmit / receive radio signals to each other through wireless communication / connections 150a, 150b, 150c.
  • the wireless communication / connections 150a, 150b, 150c can transmit / receive signals over various physical channels.
  • various signal processing processes eg, channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.
  • resource allocation processes e.g., resource allocation processes, and the like.
  • the AI device 100 is a TV, projector, mobile phone, smartphone, desktop computer, laptop, digital broadcasting terminal, PDA (personal digital assistants), PMP (portable multimedia player), navigation, tablet PC, wearable device, set-top box (STB) ), DMB receivers, radios, washing machines, refrigerators, desktop computers, digital signage, robots, vehicles, and the like.
  • PDA personal digital assistants
  • PMP portable multimedia player
  • STB set-top box
  • DMB receivers radios
  • washing machines refrigerators
  • desktop computers digital signage
  • robots, vehicles and the like.
  • the terminal 100 includes a communication unit 110, an input unit 120, a running processor 130, a sensing unit 140, an output unit 150, a memory 170 and a processor 180. It can contain.
  • the communication unit 110 may transmit and receive data to and from external devices such as other AI devices 100a to 100e or the AI server 200 using wired / wireless communication technology.
  • the communication unit 110 may transmit and receive sensor information, a user input, a learning model, a control signal, etc. with external devices.
  • the communication technology used by the communication unit 110 includes Global System for Mobile Communication (GSM), Code Division Multi Access (CDMA), Long Term Evolution (LTE), 5G, Wireless LAN (WLAN), and Wireless-Fidelity (Wi-Fi). ), Bluetooth TM, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), ZigBee, Near Field Communication (NFC), and the like.
  • GSM Global System for Mobile Communication
  • CDMA Code Division Multi Access
  • LTE Long Term Evolution
  • 5G Fifth Generation
  • WLAN Wireless LAN
  • Wi-Fi Wireless-Fidelity
  • Bluetooth TM Radio Frequency Identification
  • RFID Radio Frequency Identification
  • IrDA Infrared Data Association
  • ZigBee ZigBee
  • NFC Near Field Communication
  • the input unit 120 may acquire various types of data.
  • the input unit 120 may include a camera for inputting a video signal, a microphone for receiving an audio signal, a user input unit for receiving information from a user, and the like.
  • the camera or microphone is treated as a sensor, and the signal obtained from the camera or microphone may be referred to as sensing data or sensor information.
  • the input unit 120 may acquire training data for model training and input data to be used when obtaining an output using the training model.
  • the input unit 120 may obtain raw input data.
  • the processor 180 or the learning processor 130 may extract input features as pre-processing of the input data.
  • the learning processor 130 may train a model composed of artificial neural networks using the training data.
  • the trained artificial neural network may be referred to as a learning model.
  • the learning model can be used to infer a result value for new input data rather than learning data, and the inferred value can be used as a basis for determining to perform an action.
  • the learning processor 130 may perform AI processing together with the learning processor 240 of the AI server 200.
  • the learning processor 130 may include a memory integrated or implemented in the AI device 100.
  • the learning processor 130 may be implemented using memory 170, external memory directly coupled to the AI device 100, or memory maintained in the external device.
  • the sensing unit 140 may acquire at least one of AI device 100 internal information, AI device 100 environment information, and user information using various sensors.
  • the sensors included in the sensing unit 140 include a proximity sensor, an illuminance sensor, an acceleration sensor, a magnetic sensor, a gyro sensor, an inertial sensor, an RGB sensor, an IR sensor, a fingerprint recognition sensor, an ultrasonic sensor, an optical sensor, a microphone, and a lidar. , And radar.
  • the output unit 150 may generate output related to vision, hearing, or tactile sense.
  • the output unit 150 may include a display unit for outputting visual information, a speaker for outputting auditory information, a haptic module for outputting tactile information, and the like.
  • the memory 170 may store data supporting various functions of the AI device 100.
  • the memory 170 may store input data, learning data, learning models, learning history, etc. acquired by the input unit 120.
  • the processor 180 may determine at least one executable action of the AI device 100 based on information determined or generated using a data analysis algorithm or a machine learning algorithm. Also, the processor 180 may control components of the AI device 100 to perform a determined operation.
  • the processor 180 may request, search, receive, or utilize data of the learning processor 130 or the memory 170, and perform an operation that is predicted or determined to be preferable among the at least one executable operation. It is possible to control the components of the AI device 100 to execute.
  • the processor 180 may generate a control signal for controlling the corresponding external device, and transmit the generated control signal to the corresponding external device when it is necessary to link the external device to perform the determined operation.
  • the processor 180 may acquire intention information for a user input, and determine a user's requirement based on the obtained intention information.
  • the processor 180 uses at least one of a Speech To Text (STT) engine for converting voice input into a string or a Natural Language Processing (NLP) engine for obtaining intention information of a natural language, and a user Intention information corresponding to an input may be obtained.
  • STT Speech To Text
  • NLP Natural Language Processing
  • At this time, at least one of the STT engine or the NLP engine may be configured as an artificial neural network at least partially learned according to a machine learning algorithm. And, at least one or more of the STT engine or the NLP engine is learned by the learning processor 130, learned by the learning processor 240 of the AI server 200, or learned by distributed processing thereof May be
  • the processor 180 collects history information including the user's feedback on the operation content or operation of the AI device 100 and stores it in the memory 170 or the running processor 130, or the AI server 200, etc. Can be sent to external devices. The collected history information can be used to update the learning model.
  • the processor 180 may control at least some of the components of the AI device 100 to drive an application program stored in the memory 170. Furthermore, the processor 180 may operate by combining two or more of the components included in the AI device 100 with each other to drive the application program.
  • FIG 38 shows an AI server 200 according to an embodiment of the present disclosure.
  • the AI server 200 may refer to an apparatus for learning an artificial neural network using a machine learning algorithm or using a trained artificial neural network.
  • the AI server 200 may be composed of a plurality of servers to perform distributed processing, or may be defined as a 5G network.
  • the AI server 200 is included as a configuration of a part of the AI device 100, and may perform at least a part of AI processing together.
  • the AI server 200 may include a communication unit 210, a memory 230, a running processor 240 and a processor 260.
  • the communication unit 210 may transmit and receive data with an external device such as the AI device 100.
  • the memory 230 may include a model storage unit 231.
  • the model storage unit 231 may store a model (or artificial neural network, 231a) being trained or trained through the learning processor 240.
  • the learning processor 240 may train the artificial neural network 231a using learning data.
  • the learning model may be used while being mounted on the AI server 200 of the artificial neural network, or may be mounted and used on an external device such as the AI device 100.
  • the learning model can be implemented in hardware, software, or a combination of hardware and software. When part or all of the learning model is implemented in software, one or more instructions constituting the learning model may be stored in the memory 230.
  • the processor 260 may infer the result value for the new input data using the learning model, and generate a response or control command based on the inferred result value.

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

Abstract

L'invention concerne un procédé par lequel un terminal signale une mesure dans un système de communication sans fil, et un dispositif utilisant le procédé. Le procédé consiste : à identifier si des conditions prédéterminées, par exemple, si une défaillance de faisceau s'est produite, le nombre d'apparitions de la défaillance de faisceau, et similaires, sont satisfaites pour au moins l'un des faisceaux transmis par une cellule de desserte ; et à signaler, à la cellule de desserte, un résultat de mesure pour un ensemble de cellules spécifiques dans le terminal, si les conditions sont satisfaites.
PCT/KR2019/012648 2018-09-28 2019-09-27 Procédé par lequel un terminal signale une mesure dans un système de communication sans fil, et dispositif utilisant le procédé WO2020067804A1 (fr)

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US62/739,104 2018-09-28

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WO2024094202A1 (fr) * 2022-11-04 2024-05-10 Mediatek Inc. Amélioration de mobilité ltm

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113543237A (zh) * 2020-04-13 2021-10-22 荣耀终端有限公司 小区的选择方法及装置
WO2024094202A1 (fr) * 2022-11-04 2024-05-10 Mediatek Inc. Amélioration de mobilité ltm

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