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WO2021066414A1 - Procédé d'émission et de réception de signal dans un système de communication sans fil et dispositif associé - Google Patents

Procédé d'émission et de réception de signal dans un système de communication sans fil et dispositif associé Download PDF

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Publication number
WO2021066414A1
WO2021066414A1 PCT/KR2020/013103 KR2020013103W WO2021066414A1 WO 2021066414 A1 WO2021066414 A1 WO 2021066414A1 KR 2020013103 W KR2020013103 W KR 2020013103W WO 2021066414 A1 WO2021066414 A1 WO 2021066414A1
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Prior art keywords
wus
resource
sequence
group
monitoring
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English (en)
Korean (ko)
Inventor
황승계
안준기
김재형
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LG Electronics Inc
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LG Electronics Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a method and apparatus used in a wireless communication system, and more particularly, to a method for transmitting and receiving a wake-up signal and an apparatus therefor.
  • Wireless communication systems are widely deployed to provide various types of communication services such as voice and data.
  • a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
  • multiple access systems include Code Division Multiple Access (CDMA) systems, Frequency Division Multiple Access (FDMA) systems, Time Division Multiple Access (TDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, and Single Carrier Frequency (SC-FDMA) systems.
  • CDMA Code Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • TDMA Time Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • An object of the present invention is to provide a method and apparatus for efficiently transmitting and receiving a wake-up signal.
  • an object of the present invention is to provide a method and apparatus for reducing the probability that a terminal that does not need paging wakes up by a wake-up signal.
  • a method performed by a user equipment (UE) in a wireless communication system supporting a wake up signal (WUS) comprising: setting information for the WUS To receive; Determining a first sequence for a UE group WUS and a second sequence for a common WUS based on the configuration information for the WUS; And monitoring the UE group WUS based on the first sequence and omitting the monitoring of the common WUS based on the UE being set to a specific state.
  • a user equipment configured to operate in a wireless communication system supporting a wake up signal (WUS), the user equipment comprising: at least one processor; At least one radio frequency (RF) transceiver; And at least one memory including instructions configured to implement an operation by controlling the at least one RF transceiver when executed by the at least one processor, wherein the operation comprises: receiving configuration information for the WUS ; Determining a first sequence for a UE group WUS and a second sequence for a common WUS based on the configuration information for the WUS; And monitoring the UE group WUS based on the first sequence and omitting the monitoring of the common WUS based on the UE being set to a specific state.
  • WUS wake up signal
  • a device for a user equipment (UE) configured to operate in a wireless communication system supporting a wake up signal (WUS)
  • the device comprising at least one processor ; And a memory including instructions for performing an operation when executed by the at least one processor, the operation comprising: receiving configuration information for the WUS; Determining a first sequence for a UE group WUS and a second sequence for a common WUS based on the configuration information for the WUS; And monitoring the UE group WUS based on the first sequence and omitting the monitoring of the common WUS based on the UE being set to a specific state.
  • WUS wake up signal
  • a computer readable device comprising instructions that, when executed by a processor, cause a user equipment (UE) including the processor to perform an operation related to a wake up signal (WUS).
  • UE user equipment
  • a possible storage medium is provided, the operation comprising: receiving setting information for the WUS; Determining a first sequence for a UE group WUS and a second sequence for a common WUS based on the configuration information for the WUS; And monitoring the UE group WUS based on the first sequence and omitting the monitoring of the common WUS based on the UE being set to a specific state.
  • the specific state may include a low paging probability.
  • monitoring the UE group WUS based on the first sequence and monitoring the common WUS based on the second sequence may further include have.
  • monitoring the UE group WUS includes: monitoring the UE group WUS in a first WUS resource based on the UE being set to the specific state; And monitoring the UE group WUS in a second WUS resource different from the first WUS resource based on the UE not being set to the specific state.
  • the first WUS resource and the second WUS resource may be time division multiplexed (TDM).
  • TDM time division multiplexed
  • the first WUS resource and the second WUS resource may be frequency division multiplexed (FDM).
  • FDM frequency division multiplexed
  • the method or the operation may further include receiving information on the first WUS resource and the second WUS resource through higher layer signaling.
  • the higher layer signaling may include system information block (SIB) or radio resource control (RRC) signaling.
  • SIB system information block
  • RRC radio resource control
  • 1 illustrates physical channels and general signal transmission used in a 3GPP system.
  • FIG. 3 illustrates a slot structure of an LTE frame.
  • FIG. 4 illustrates a structure of a downlink subframe of an LTE system.
  • FIG. 5 illustrates a structure of a radio frame used in an NR system.
  • FIG. 6 illustrates a slot structure of an NR frame.
  • FIG. 11 illustrates an extended DRX (eDRX) cycle.
  • 13 and 14 each illustrate a flowchart of a base station operation and a terminal operation to which the method proposed in the present invention can be applied.
  • 22 to 26 illustrate a system and a communication device to which the methods proposed in the present invention can be applied.
  • downlink means communication from a base station to a terminal
  • uplink means communication from a terminal to a base station.
  • the transmitter may be part of the base station, and the receiver may be part of the terminal.
  • the transmitter may be a part of the terminal, and the receiver may be a part of the base station.
  • CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented with a radio technology such as Global System for Mobile communications (GSM)/General Packet Radio Service (GPRS)/Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • OFDMA may be implemented with a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA).
  • UTRA is a part of Universal Mobile Telecommunications System (UMTS).
  • 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA
  • LTE-A Advanced
  • LTE-A pro is an evolved version of 3GPP LTE.
  • 3GPP New Radio or New Radio Access Technology (NR) or 5G is an evolved version of 3GPP LTE/LTE-A/LTE-A pro.
  • LTE refers to a technology after 3GPP TS (Technical Specification) 36.xxx Release 8.
  • LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A
  • LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro.
  • 3GPP 5G refers to technology after TS 36.xxx Release 15, and 3GPP NR refers to technology after TS 38.xxx Release 15.
  • LTE/NR may be referred to as a 3GPP system. "xxx" means the standard document detail number.
  • LTE/NR may be collectively referred to as a 3GPP system.
  • Background art, terms, abbreviations, and the like used in the description of the present invention may refer to matters described in standard documents published before the present invention. For example, reference may be made to the following documents, the specification of which is incorporated by reference in its entirety.
  • UE User Equipment
  • RRC Radio Resource Control
  • UE User Equipment
  • RRC Radio Resource Control
  • E-UTRAN evolved-UMTS terrestrial radio access network
  • LTE long term evolution
  • LTE-A / LTE-A Pro / 5G system may be collectively referred to as an LTE system.
  • NG-RAN may be referred to as an NR system.
  • User equipment (UE) may be fixed or mobile, and referred to by other terms such as terminal, mobile station (MS), user terminal (UT), subscriber station (SS), mobile terminal (MT), wireless device, etc. Can be.
  • a base station (BS) is a fixed station that communicates with a UE in general, and other terms such as evolved Node-B (eNB), general Node-B (gNB), base transceiver system (BTS), access point (AP), etc.
  • eNB evolved Node-B
  • gNB general Node-B
  • BTS base transceiver system
  • AP access point
  • a terminal receives information from a base station through a downlink (DL), and the terminal transmits information to the base station through an uplink (UL).
  • the information transmitted and received by the base station and the terminal includes data and various control information, and various physical channels exist according to the type/use of the information transmitted and received by them.
  • the UE When the power is turned off while the power is turned on again, or the UE newly enters the cell performs an initial cell search operation such as synchronizing with the base station (S11).
  • the UE receives a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) from the base station, synchronizes with the base station, and acquires information such as cell identity (cell identity).
  • the terminal may obtain intra-cell broadcast information by receiving a PBCH (Physical Broadcast Channel) from the base station.
  • the UE may check the downlink channel state by receiving a DL RS (Downlink Reference Signal) in the initial cell search step.
  • PBCH Physical Broadcast Channel
  • the UE may acquire more detailed system information by receiving a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Control Channel (PDSCH) corresponding thereto (S12).
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Control Channel
  • the terminal may perform a random access procedure to complete access to the base station (S13 to S16). Specifically, the terminal may transmit a random access preamble through a physical random access channel (PRACH) (S13), and receive a random access response (RAR) for the preamble through a PDCCH and a corresponding PDSCH (S14). Thereafter, the UE transmits a physical uplink shared channel (PUSCH) using scheduling information in the RAR (S15), and may perform a contention resolution procedure such as a PDCCH and a corresponding PDSCH (S16).
  • PRACH physical random access channel
  • RAR random access response
  • the UE transmits a physical uplink shared channel (PUSCH) using scheduling information in the RAR (S15), and may perform a contention resolution procedure such as a PDCCH and a corresponding PDSCH (S16).
  • PUSCH physical uplink shared channel
  • the UE may perform PDCCH/PDSCH reception (S17) and PUSCH/PUCCH (Physical Uplink Control Channel) transmission (S18) as a general uplink/downlink signal transmission procedure.
  • Control information transmitted by the terminal to the base station is referred to as UCI (Uplink Control Information).
  • UCI includes HARQ ACK/NACK (Hybrid Automatic Repeat and ReQuest Acknowledgement/Negative-ACK), SR (Scheduling Request), CSI (Channel State Information), and the like.
  • CSI includes Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), Rank Indication (RI), and the like.
  • UCI is generally transmitted through PUCCH, but may be transmitted through PUSCH when control information and data are to be transmitted at the same time.
  • the UE may aperiodically transmit UCI through the PUSCH according to the request/instruction of the network.
  • LTE supports frame type 1 for frequency division duplex (FDD), frame type 2 for time division duplex (TDD), and frame type 3 for unlicensed cell (UCell).
  • FDD frequency division duplex
  • TDD time division duplex
  • Uell unlicensed cell
  • PCells Primary Cells
  • SCells Secondary Cells
  • operations described herein may be independently applied for each cell.
  • different frame structures may be used for different cells.
  • time resources eg, subframes, slots, subslots
  • TU Time Unit
  • the downlink radio frame is defined as 10 1ms subframes (Subframes, SFs).
  • the subframe includes 14 or 12 symbols according to a cyclic prefix (CP).
  • CP cyclic prefix
  • the symbol may mean an OFDM (A) symbol or an SC-FDM (A) symbol according to a multiple access scheme.
  • the symbol may mean an OFDM (A) symbol in downlink and an SC-FDM (A) symbol in uplink.
  • the OFDM(A) symbol is referred to as a CP-OFDM(A) (Cyclic Prefix-OFDM(A)) symbol
  • the SC-FDM(A) symbol is DFT-s-OFDM(A) (Discrete Fourier Transform-spread-OFDM). (A)) It may be referred to as a symbol.
  • Frame type 2 consists of two half frames.
  • the half frame includes 4 (or 5) general subframes and 1 (or 0) special subframes.
  • the general subframe is used for uplink or downlink according to the UL-DL configuration (Uplink-Downlink Configuration).
  • the subframe consists of two slots.
  • the structure of the radio frame described above is only an example, and the number of subframes included in the radio frame, the number of slots included in the subframe, and the number of symbols included in the slot may be variously changed.
  • FIG. 3 illustrates a slot structure of an LTE frame.
  • a slot includes a plurality of symbols in the time domain, and includes a plurality of resource blocks (RBs) in the frequency domain.
  • the symbol also means a symbol section.
  • the structure of the slot may be expressed as a resource grid consisting of N DL/UL RB ⁇ N RB sc subcarriers and N DL/UL symb symbols.
  • N DL RB represents the number of RBs in the downlink slot
  • N UL RB represents the number of RBs in the UL slot.
  • N DL RB and N UL RB depend on the DL bandwidth and the UL bandwidth, respectively.
  • N DL symb represents the number of symbols in the DL slot
  • N UL symb represents the number of symbols in the UL slot
  • N RB sc represents the number of subcarriers constituting the RB.
  • the number of symbols in the slot can be variously changed according to the length of the SCS and CP. For example, in the case of a normal CP, one slot includes 7 symbols, but in the case of an extended CP, one slot includes 6 symbols.
  • RB is defined as N DL/UL symb (eg, 7) consecutive symbols in the time domain, and N RB sc (eg, 12) consecutive subcarriers in the frequency domain.
  • RB may mean a physical resource block (PRB) or a virtual resource block (VRB), and the PRB and VRB may be mapped 1:1.
  • PRB physical resource block
  • VRB virtual resource block
  • Two RBs positioned one in each of two slots of a subframe are referred to as RB pairs.
  • Two RBs constituting an RB pair have the same RB number (or, also referred to as an RB index).
  • a resource composed of one symbol and one subcarrier is called a resource element (RE) or tone.
  • Each RE in the resource grid may be uniquely defined by an index pair (k, l) in the slot.
  • k is an index assigned from 0 to N DL/UL RB ⁇ N RB sc -1 in the frequency domain
  • l is an index assigned
  • FIG. 4 illustrates a structure of a downlink subframe of an LTE system.
  • a maximum of 3 (or 4) OFDM(A) symbols located in front of a first slot in a subframe correspond to a control region to which a downlink control channel is allocated.
  • the remaining OFDM(A) symbols correspond to the data region to which the PDSCH is allocated, and the basic resource unit of the data region is RB.
  • the downlink control channel includes a Physical Control Format Indicator Channel (PCFICH), a Physical Downlink Control Channel (PDCCH), a Physical Hybrid ARQ Indicator Channel (PHICH), and the like.
  • the PCFICH is transmitted in the first OFDM symbol of a subframe and carries information on the number of OFDM symbols used for transmission of a control channel within the subframe.
  • the PHICH is a response to uplink transmission and carries a HARQ ACK/NACK (acknowledgment/negative-acknowledgment) signal.
  • Control information transmitted through the PDCCH is referred to as Downlink Control Information (DCI).
  • DCI Downlink Control Information
  • the DCI includes uplink or downlink scheduling information or an uplink transmit power control command for an arbitrary terminal group.
  • FIG. 5 illustrates a structure of a radio frame used in an NR system.
  • uplink and downlink transmission is composed of frames.
  • the radio frame has a length of 10 ms and is defined as two 5 ms half-frames (HF).
  • the half-frame is defined as five 1ms subframes (Subframe, SF).
  • the subframe is divided into one or more slots, and the number of slots in the subframe depends on Subcarrier Spacing (SCS).
  • SCS Subcarrier Spacing
  • Each slot includes 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).
  • CP cyclic prefix
  • the symbol may include an OFDM symbol (or CP-OFDM symbol) and an SC-FDMA symbol (or DFT-s-OFDM symbol).
  • Table 1 exemplifies that when a normal CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to the SCS.
  • N subframe,u slot the number of slots in the subframe
  • Table 2 exemplifies that when the extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to the SCS.
  • OFDM(A) numerology eg, SCS, CP length, etc.
  • OFDM(A) numerology eg, SCS, CP length, etc.
  • the (absolute time) section of the time resource eg, SF, slot, or TTI
  • TU Time Unit
  • FIG. 6 illustrates a slot structure of an NR frame.
  • 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 includes 12 symbols.
  • the carrier includes a plurality of subcarriers in the frequency domain.
  • RB Resource Block
  • BWP Bandwidth Part
  • the carrier may contain up to N (eg, 5) BWPs. Data communication is performed through the activated BWP, and only one BWP can be activated to one terminal.
  • Each element in the resource grid is referred to as a resource element (RE), and one complex symbol may be mapped.
  • RE resource element
  • the base station transmits a related signal to the terminal through a downlink channel, and the terminal receives a related signal from the base station through a downlink channel.
  • PDSCH Physical downlink shared channel
  • PDSCH carries downlink data (e.g., DL-shared channel transport block, DL-SCH TB), and modulation methods such as Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (QAM), 64 QAM, and 256 QAM are used. Apply.
  • a codeword is generated by encoding TB.
  • the PDSCH can carry up to two codewords. Scrambling and modulation mapping are performed for each codeword, and modulation symbols generated from each codeword are mapped to one or more layers (Layer mapping). Each layer is mapped to a resource together with a demodulation reference signal (DMRS) to generate an OFDM symbol signal, and is transmitted through a corresponding antenna port.
  • DMRS demodulation reference signal
  • the PDCCH carries downlink control information (DCI) and a QPSK modulation method is applied.
  • One PDCCH is composed of 1, 2, 4, 8, 16 Control Channel Elements (CCEs) according to the Aggregation Level (AL).
  • CCE consists of six REGs (Resource Element Group).
  • One REG is defined by one OFDM symbol and one (P)RB.
  • the PDCCH is transmitted through a control resource set (CORESET).
  • CORESET is defined as a REG set with a given pneumonology (eg, SCS, CP length, etc.).
  • a plurality of CORESETs for one terminal may overlap in the time/frequency domain.
  • CORESET may be set through system information (eg, MIB) or UE-specific higher layer (eg, Radio Resource Control, RRC, layer) signaling. Specifically, the number of RBs constituting CORESET and the number of symbols (maximum 3) may be set by higher layer signaling.
  • system information eg, MIB
  • UE-specific higher layer eg, Radio Resource Control, RRC, layer
  • RRC Radio Resource Control
  • the number of RBs constituting CORESET and the number of symbols (maximum 3) may be set by higher layer signaling.
  • the UE acquires DCI transmitted through the PDCCH by performing decoding (aka, blind decoding) on the set of PDCCH candidates.
  • the set of PDCCH candidates decoded by the UE is defined as a PDCCH search space set.
  • the search space set may be a common search space or a UE-specific search space.
  • the UE may acquire DCI by monitoring PDCCH candidates in one or more search space sets set by MIB or higher layer signaling.
  • Each CORESET setting is associated with one or more sets of search spaces, and each set of search spaces is associated with one COREST setting.
  • One set of search spaces is determined based on the following parameters.
  • controlResourceSetId Represents the set of control resources related to the search space set.
  • -monitoringSlotPeriodicityAndOffset indicates PDCCH monitoring period interval (slot unit) and PDCCH monitoring interval offset (slot unit)
  • -monitoringSymbolsWithinSlot indicates the PDCCH monitoring pattern in the slot for PDCCH monitoring (e.g., indicates the first symbol(s) of the control resource set)
  • Table 3 exemplifies the characteristics of each search space type.
  • MTC is a form of data communication in which one or more machines are included, and can be applied to Machine-to-Machine (M2M) or Internet-of-Things (IoT).
  • M2M Machine-to-Machine
  • IoT Internet-of-Things
  • a machine means an entity that does not require direct human manipulation or intervention.
  • the machine includes a smart meter equipped with a mobile communication module, a vending machine, a portable terminal having an MTC function, and the like.
  • MTC through MTC, services such as meter reading, water level measurement, use of surveillance cameras, and inventory reporting of vending machines may be provided.
  • MTC communication has a characteristic that the amount of transmitted data is small and uplink/downlink data transmission and reception occurs occasionally. Therefore, it is effective to lower the unit cost of the MTC device and reduce battery consumption in accordance with the low data rate.
  • MTC devices generally have little mobility, and accordingly, MTC communication has a characteristic that the channel environment is hardly changed.
  • UE category 0 is an indicator of how much data a terminal can process in a communication modem.
  • UE category 0 UEs can reduce baseband/RF complexity by using a reduced peak data rate, half-duplex operation with a relaxed radio frequency (RF) requirement, and a single receive antenna.
  • RF radio frequency
  • eMTC enhanced MTC
  • MTC is eMTC, LTE-M1/M2, BL/CE (Bandwidth reduced low complexity/coverage enhanced), non-BL UE (in enhanced coverage), NR MTC (or Reduced Capability or RedCap), enhanced BL/ It may be used interchangeably with terms such as CE, or other equivalent terms.
  • MTC terminals/devices encompass terminals/devices with MTC functions (eg, smart meters, bending machines, portable terminals with MTC functions).
  • the physical signals and channels used in the MTC are similar to the physical signals and channels described with reference to FIG. 1, and general signal transmission using them may be performed similarly to the procedure described with reference to FIG. 1.
  • the PDCCH for MTC may be referred to as MPDCCH (MTC PDCCH), but the MPDCCH may be collectively referred to as PDCCH.
  • MTC is a specific band (or channel band) among the system bandwidth of the cell, regardless of the system bandwidth of the cell (MTC subband or narrowband ( narrowband, NB)).
  • MTC subband or narrowband narrowband, NB
  • the uplink/downlink operation of the MTC terminal may be performed only in the 1.08 MHz frequency band.
  • 1.08 MHz corresponds to six consecutive Physical Resource Blocks (PRBs) in the LTE system, and is defined to follow the same cell search and random access procedures as LTE terminals.
  • PRBs Physical Resource Blocks
  • the MTC subband may be defined in consideration of a frequency range and subcarrier spacing (SCS).
  • SCS subcarrier spacing
  • the size of the MTC subband may be defined as X consecutive PRBs (ie, 0.18*X*(2 ⁇ )MHz bandwidth) (see Table 1 for ⁇ ).
  • X may be defined as 20 according to the size of a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block.
  • the MTC can operate in at least one bandwidth part (BWP). In this case, a plurality of MTC subbands may be configured in the BWP.
  • BWP bandwidth part
  • a PDSCH is scheduled using a PDCCH.
  • the PDSCH is scheduled using the MPDCCH.
  • the MTC terminal can monitor the MPDCCH candidate in a search space within a subframe.
  • monitoring includes blind decoding MPDCCH candidates.
  • MPDCCH transmits DCI, and DCI includes uplink or downlink scheduling information.
  • MPDCCH is multiplexed with PDSCH and FDM in a subframe.
  • the MPDCCH is repeatedly transmitted in up to 256 subframes, and the DCI transmitted by the MPDCCH includes information on the number of MPDCCH repetitions.
  • the PDSCH scheduled by the MPDCCH starts transmission in subframe #N+2.
  • the PDSCH may be repeatedly transmitted in a maximum of 2048 subframes.
  • the MPDCCH and PDSCH may be transmitted in different MTC subbands.
  • uplink scheduling when repeated transmission of the MPDCCH ends in subframe #N, the PUSCH scheduled by the MPDCCH starts transmission in subframe #N+4.
  • the PDSCH when the PDSCH is repeatedly transmitted in 32 subframes, the PDSCH is transmitted in the first MTC subband in the first 16 subframes, and the PDSCH is transmitted in the second MTC subband in the remaining 16 subframes. Can be transmitted.
  • MTC operates in a half-duplex mode. HARQ retransmission of MTC is adaptive and asynchronous.
  • NB-IoT represents a narrowband Internet of Things technology that supports low-power wide area networks through existing wireless communication systems (eg, LTE, NR).
  • NB-IoT may refer to a system for supporting low complexity and low power consumption through a narrowband. Since the NB-IoT system uses OFDM parameters such as subcarrier spacing (SCS) in the same manner as the existing system, there is no need to allocate an additional band for the NB-IoT system. For example, one PRB of the existing system band can be allocated for NB-IoT. Since the NB-IoT terminal recognizes a single PRB as each carrier, PRB and carrier may be interpreted as the same meaning in the description of NB-IoT.
  • SCS subcarrier spacing
  • NB-IoT can operate in a multi-carrier mode.
  • the carrier is an anchor type carrier (i.e., anchor carrier, anchor PRB) and a non-anchor type carrier (i.e., non- It may be defined as an anchor carrier (non-anchor carrier), non-anchor PRB).
  • the anchor carrier may mean a carrier that transmits NPSS, NSSS, NPBCH, and NPDSCH for system information block (N-SIB) for initial access from the viewpoint of the base station. That is, in NB-IoT, a carrier for initial connection may be referred to as an anchor carrier, and other(s) may be referred to as a non-anchor carrier. In this case, only one anchor carrier may exist in the system, or a plurality of anchor carriers may exist.
  • NB-IoT In the present specification, the description of the NB-IoT is mainly described when it is applied to an existing LTE system, but the description of this specification may be extended to a next-generation system (eg, an NR system, etc.). In addition, in the present specification, the contents related to NB-IoT can be extended and applied to MTC aiming for similar technical purposes (eg, low-power, low-cost, coverage improvement, etc.). In addition, NB-IoT may be replaced with other equivalent terms such as NB-LTE, NB-IoT enhancement, enhanced NB-IoT, further enhanced NB-IoT, and NB-NR.
  • Narrowband Physical Broadcast Channel Narrowband Physical Downlink Shared Channel (NPDSCH), and Narrowband Physical Downlink Control Channel (NPDCCH) are provided for NB-IoT downlink.
  • Physical signals such as Primary Synchronization Signal) and NRS (Narrowband Reference Signal) are provided.
  • the NB-IoT frame structure may be set differently according to subcarrier spacing. For example, in the NB-IoT system, a 15 kHz subcarrier spacing and a 3.75 kHz subcarrier spacing may be supported. It goes without saying that the NB-IoT frame structure is not limited thereto, and NB-IoT for other subcarrier intervals (eg, 30 kHz, etc.) may also be considered in different time/frequency units.
  • the NB-IoT frame structure based on the LTE system frame structure has been described as an example, but this is for convenience of description and is not limited thereto, and the method described in this specification is a next-generation system (e.g., NR system ) Can be extended and applied to NB-IoT based on the frame structure.
  • a next-generation system e.g., NR system
  • the NB-IoT frame structure for the 15 kHz subcarrier interval may be set the same as the frame structure of the above-described legacy system (ie, LTE system). That is, a 10ms NB-IoT frame may include 10 1ms NB-IoT subframes, and a 1ms NB-IoT subframe may include 2 0.5ms NB-IoT slots. In addition, each 0.5ms NB-IoT may include 7 OFDM symbols.
  • a 10ms NB-IoT frame includes 5 2ms NB-IoT subframes, and a 2ms NB-IoT subframe includes 7 OFDM symbols and one guard period (GP). Can include.
  • the 2ms NB-IoT subframe may be expressed as an NB-IoT slot or an NB-IoT resource unit (RU).
  • Physical resources of NB-IoT downlink are physical resources of other wireless communication systems (e.g. LTE system, NR system, etc.), except that the system bandwidth is a certain number of RBs (e.g., 1 RB, 180 kHz) It can be set by reference.
  • the physical resource of the NB-IoT downlink is 1 RB in the frequency domain using the resource grid of the LTE system shown in FIG. 4 (i.e. , 1 PRB).
  • the system bandwidth may be limited to one RB.
  • the downlink physical channel/signal is transmitted through one PRB and supports 15kHz subcarrier interval/multi-tone transmission.
  • NPSS is transmitted in the 6th subframe of every frame, and NSSS is transmitted in the last (eg, 10th) subframe of every even frame.
  • the terminal may acquire frequency, symbol, and frame synchronization using synchronization signals (NPSS, NSSS) and search for 504 physical cell IDs (PCIDs) (ie, base station IDs).
  • NPBCH is transmitted in the first subframe of every frame and carries NB-MIB.
  • NRS is provided as a reference signal for downlink physical channel demodulation and is generated in the same manner as LTE.
  • NB-PCID Physical Cell ID
  • NCell ID or NCell ID, NB-IoT base station ID
  • NRS is transmitted through one or two antenna ports.
  • NPDCCH and NPDSCH may be transmitted in the remaining subframes except for the NPSS/NSSS/NPBCH.
  • NPDCCH and NPDSCH cannot be transmitted together in the same subframe.
  • NPDCCH carries DCI, and DCI supports three types of DCI formats.
  • DCI format N0 includes narrowband physical uplink shared channel (NPUSCH) scheduling information, and DCI formats N1 and N2 include NPDSCH scheduling information.
  • the NPDCCH can be repetitively transmitted up to 2048 times to improve coverage.
  • NPDSCH is used to transmit data (eg, TB) of transport channels such as DL-SCH (Downlink-Shared Channel) and PCH (Paging Channel).
  • the maximum TBS is 680 bits, and up to 2048 repetitions can be transmitted to improve coverage.
  • the UE may perform a DRX operation while performing the procedures and/or methods described/suggested in this specification.
  • a terminal in which DRX is configured may reduce power consumption by discontinuously receiving a DL signal.
  • DRX may be performed in Radio Resource Control (RRC)_IDLE state, RRC_INACTIVE state, and RRC_CONNECTED state.
  • RRC Radio Resource Control
  • DRX is used for discontinuous reception of the PDCCH.
  • DRX performed in the RRC_CONNECTED state is referred to as RRC_CONNECTED DRX.
  • the DRX cycle consists of On Duration and Opportunity for DRX.
  • the DRX cycle defines the time interval at which the on period is periodically repeated.
  • the on period represents a time period during which the UE monitors to receive the PDCCH (or MPDCCH, NPDCCH).
  • the UE performs PDCCH monitoring during the on period. If there is a PDCCH successfully detected during PDCCH monitoring, the UE operates an inactivity timer and maintains an awake state. On the other hand, if there is no PDCCH successfully detected during PDCCH monitoring, the UE enters a sleep state after the on period ends.
  • PDCCH monitoring/reception may be discontinuously performed in the time domain in performing the procedures and/or methods described/suggested herein.
  • PDCCH monitoring in the present invention may be performed discontinuously according to DRX configuration in the activated cell(s). Specifically, PDCCH monitoring is performed when a PDCCH opportunity (eg, a time period set to monitor PDCCH (eg, one or more consecutive OFDM symbols)) corresponds to an ON period, and PDCCH monitoring when corresponding to a DRX opportunity Can be omitted.
  • a PDCCH opportunity eg, a time period set to monitor PDCCH (eg, one or more consecutive OFDM symbols)
  • PDCCH monitoring/reception may be continuously performed in the time domain in performing the above-described/suggested procedure and/or method. For example, if DRX is not set, the PDCCH reception opportunity may be set continuously in the present invention. Meanwhile, regardless of whether or not DRX is set, PDCCH monitoring may be limited in a time period set as a measurement gap.
  • the DRX is used to receive paging signals discontinuously.
  • DRX performed in the RRC_IDLE (or RRC_INACTIVE) state is referred to as RRC_IDLE DRX.
  • PDCCH monitoring/reception may be discontinuously performed in the time domain in performing the procedures and/or methods described/suggested herein.
  • a DRX may be configured for discontinuous reception of a paging signal.
  • the terminal may receive DRX configuration information from the base station through higher layer (eg, RRC) signaling.
  • the DRX configuration information may include configuration information for a DRX cycle, a DRX offset, and a DRX timer.
  • the UE repeats an On Duration and a Sleep Duration according to the DRX cycle.
  • the terminal may operate in a wakeup mode in the on period and in a sleep mode in the sleep period.
  • the UE may monitor a paging occasion (PO) to receive a paging message.
  • PO means a time resource/section (eg, subframe, slot) in which the terminal expects to receive a paging message.
  • PO monitoring includes monitoring the PDCCH (or MPDCCH, NPDCCH) scrambled from PO to P-RNTI (hereinafter, paging PDCCH).
  • the paging message may be included in the paging PDCCH or may be included in the PDSCH scheduled by the paging PDCCH.
  • One or a plurality of PO(s) are included in a paging frame (PF), and the PF may be periodically set based on the UE ID.
  • PF paging frame
  • the PF corresponds to one radio frame
  • the UE ID may be determined based on the International Mobile Subscriber Identity (IMSI) of the terminal.
  • IMSI International Mobile Subscriber Identity
  • the terminal monitors only one PO per DRX cycle.
  • the terminal receives a paging message instructing to change its ID and/or system information from the PO, it performs a RACH process to initialize (or reset) connection with the base station, or receives new system information from the base station ( Or obtain). Therefore, in performing the above-described/suggested procedure and/or method, PO monitoring may be performed discontinuously in the time domain to perform RACH for connection with the base station or to receive (or acquire) new system information from the base station. I can.
  • FIG. 11 illustrates an extended DRX (eDRX) cycle.
  • the maximum cycle duration may be limited to 2.56 seconds.
  • unnecessary power consumption may occur during the DRX cycle.
  • PSM power saving mode
  • PTW paging time window or paging transmission window
  • the extended DRX cycle is simply referred to as the eDRX cycle.
  • Paging Hyper-frames PH are periodically configured based on the UE ID, and PTWs are defined in the PH.
  • the terminal may perform a DRX cycle in the PTW duration to switch to the wake-up mode in its PO to monitor the paging signal.
  • One or more DRX cycles (eg, wake-up mode and sleep mode) of FIG. U2 may be included in the PTW period.
  • the number of DRX cycles in the PTW period may be configured by the base station through an upper layer (eg, RRC) signal.
  • WUS can be used to reduce power consumption related to paging monitoring.
  • WUS is a physical layer signal indicating whether or not the UE monitors a paging signal (eg, MPDCCH/NPDCCH scrambled with P-RNTI) according to the cell configuration.
  • a paging signal eg, MPDCCH/NPDCCH scrambled with P-RNTI
  • WUS may be associated with one or more POs (N ⁇ 1).
  • the terminal may monitor N number of POs after being associated with WUS.
  • the terminal can maintain the sleep mode by omitting PO monitoring until the next WUS is monitored.
  • the terminal may receive configuration information for WUS from the base station and monitor the WUS based on the WUS configuration information.
  • the configuration information for WUS may include, for example, a maximum WUS duration, the number of consecutive POs associated with WUS, and gap information.
  • the maximum WUS period indicates the maximum time period in which WUS can be transmitted, and may be expressed as a ratio of the maximum number of repetitions (eg, Rmax) related to the PDCCH (eg, MPDCCH, NPDCCH).
  • the terminal may expect repeated WUS transmission within the maximum WUS interval, but the actual number of WUS transmissions may be less than the maximum number of WUS transmissions within the maximum WUS interval. For example, for a terminal within good coverage, the number of WUS repetitions may be small.
  • a resource/opportunity through which WUS can be transmitted within the maximum WUS interval is referred to as a WUS resource.
  • the WUS resource may be defined as a plurality of consecutive OFDM symbols and a plurality of consecutive subcarriers.
  • the WUS resource may be defined as a plurality of consecutive OFDM symbols and a plurality of consecutive subcarriers in a subframe or slot.
  • the WUS resource may be defined as 14 consecutive OFDM symbols and 12 consecutive subcarriers.
  • -PDCCH An abbreviation for Physical Downlink Control Channel, which means a communication channel of a physical layer for providing downlink control information.
  • the methods proposed in the present invention can be applied to PDCCH of various structures such as EPDCCH (Enhanced-PDCCH), MPDCCH (MTC-PDCCH), NPDCCH (Narrowband-PDCCH), etc. It is used as a representative term for PDCCH.
  • -A/N Acknowledgement/Negative Acknowledgement for Cell A: to a downlink signal (e.g., data (e.g., PDSCH) or control channel (e.g., SPS (Semi-Persistent Scheduling) related PDCCH)) received from Cell A About A/N information. It may be referred to as ACK/NACK information.
  • a downlink signal e.g., data (e.g., PDSCH) or control channel (e.g., SPS (Semi-Persistent Scheduling) related PDCCH)
  • SPS Semi-Persistent Scheduling
  • -UE group WUS WUS that can group UEs monitoring the same paging opportunity (PO) into a plurality of groups, and can be classified for each group
  • WUS capable UEs WUS capable UEs
  • WUS capable UEs that do not have the ability to distinguish between UE groups monitoring the same PO (eg, WUS capable UEs defined in 3GPP Technical Specification (TS) Rel-15) monitored by WUS.
  • the legacy WUS resource may be determined as described with reference to FIG. 12, and more specifically, the terminal determines the end time of the maximum WUS interval including the legacy WUS resource by applying gap information to the PO configured to it.
  • the base station may determine the end time of the maximum WUS interval including the legacy WUS resource by applying gap information for the specific terminal to the PO configured for the specific terminal.
  • RB pair Two RBs positioned one in each of two slots of a subframe are referred to as an RB pair.
  • -WUS-to-PO gap the gap between WUS and PO;
  • the DRX gap is used, and when the UE is in the eDRX state, it may be divided into a short eDRX gap and a long eDRX gap according to the capability of the terminal.
  • -Actual WUS-to-PO gap The actual gap between a specific WUS resource and PO.
  • TDM Time Division Multiplexing
  • -WUS resource a resource in the time/frequency domain in which WUS can be transmitted/received
  • -NAS Non Access Stratum: refers to a layer for sending and receiving signaling and traffic messages between the UE and the core network, and the upper layer of the RRC layer.
  • Mobility Management Entity Mobility Management Entity
  • -Rel-15 refers to 3rd Generation Partnership Project (3GPP) Technical Specification (TS) Release 15.
  • 3GPP 3rd Generation Partnership Project
  • TS Technical Specification
  • -LTE refers to a system that supports 3GPP TS 36 series (eg, 36.XXX).
  • -NR refers to a system that supports 3GPP TS 38 series (eg, 38.XXX).
  • WUS was introduced for the purpose of power saving of the terminal.
  • the WUS is a signal indicating whether paging transmission actually exists in a search space for paging of a specific location.
  • the base station may transmit the WUS at the WUS transmission location(s) associated with the PO.
  • the terminal monitors the WUS transmission location associated with the PO of a specific location, and if WUS is detected at the WUS transmission location, it can expect that paging will be transmitted from the corresponding PO, and if WUS cannot be detected at the WUS transmission location. In this case, power saving can be obtained through an operation that does not expect paging in the corresponding PO.
  • WUS defined in the Rel-15 NB-IoT and MTC does not support a separate UE grouping (or grouping) operation, and all WUSs that monitor the same PO in the same WUS-to-PO gap state are possible.
  • WUS capable UEs are designed to expect the same WUS, and then, in the present invention, this is expressed as a legacy WUS (legacy WUS) for convenience of description.
  • LTE Rel-16 NB-IoT and MTC are discussing the introduction of a UE group WUS (UE group WUS) for the purpose of improving the power saving gain of the Rel-15 WUS.
  • UE group WUS UE group WUS
  • all terminals having the same DRX state (DRX or eDRX) and setting the same WUS-to-PO gap are supposed to expect the same WUS.
  • the WUS defined in the Rel-15 NB-IoT and MTC is expressed as a legacy WUS. Therefore, when WUS for another terminal using the same PO is transmitted, the terminal always attempts to decode the corresponding paging regardless of its own paging, which reduces unnecessary power consumption of the terminal. It can be a factor to increase.
  • Rel-16 discusses the UE group WUS in which terminals monitoring the same PO are grouped into a plurality of groups, and a WUS that can be classified for each group is used.
  • a method of configuring a UE group based on the characteristics of a terminal or information on a service targeted by the terminal is being discussed together. Characteristically, based on the information on the average frequency and probability (paging probability) that the terminal receives paging, the terminal and the MME perform negotiation using NAS signaling, and the result is determined. Accordingly, a method of determining the UE group WUS method may be considered. In general, a terminal having a low paging probability may have a relatively high probability of waking up by a WUS for waking another terminal because a case where actual paging transmission is required is low. This is not efficient in terms of power consumption of the UE.
  • the probability of transmitting WUS for the terminal may be relatively high, and terminals that do not require paging due to transmission of WUS for the terminal with a high paging probability frequently The probability of waking up may increase.
  • the present invention proposes methods for solving this problem.
  • WUS resources corresponding to each UE group The structure of hopping according to this time is being discussed.
  • different WUS resources may have different actual WUS-to-PO gaps, and when WUS resources for a random UE group are fixed, relative As a result, the power consumption efficiency of UE groups having a large actual WUS-to-PO gap may be relatively degraded.
  • WUS resource hopping is applied, since UE groups can have a fair actual WUS-to-PO gap on average, it is possible to gain a gain in terms of fairness in power consumption. However, if a structure in which WUS resource hopping cannot obtain a benefit or cannot be applied may occur, a structure in which WUS resource hopping can be disabled may be required, and the base station and the terminal Information on enable/disable must be recognized in the same way.
  • the present invention proposes methods for solving this problem.
  • a method of pre-transmitting a signal or a channel for indicating whether a specific channel is transmitted in a communication system such as LTE and NR may be considered.
  • the specific channel may be a PDCCH through which paging DCI is transmitted in an idle mode (IDLE mode) state, or may be a PDCCH through which a monitoring DCI is transmitted in an RRC connected mode state.
  • the signal or channel for notifying whether to transmit may be WUS used in LTE NB-IoT and MTC, or may be a power saving signal/channel discussed in NR.
  • the method proposed in the present invention is to inform whether to transmit a specific signal/channel or to pre-load some information for the purpose of power consumption reduction or overhead reduction. It can be generally applied to a transmission/reception method using an informed signal/channel.
  • FIGS. 13 and 14 each illustrate a flowchart of a base station operation and a terminal operation to which the method proposed in the present invention can be applied.
  • the operation is described based on the WUS that notifies whether paging is transmitted or received in advance, but a signal or channel for informing whether to transmit the PDCCH in advance, such as a power saving signal/channel discussed in NR, is provided. Even when used, the concept of the invention can be applied.
  • “paging” in the proposed methods of the present invention may be generalized to “PDCCH”.
  • FIG. 13 is a flowchart illustrating an operation of a base station to which the method proposed in the present invention can be applied.
  • the base station may generate and transmit configuration information related to the UE group WUS in order to support the operation of the UE group WUS (S1302).
  • the configuration information may be transmitted using a higher layer signal (eg, SIB or RRC signaling).
  • the base station may generate at least one sequence (or at least one WUS sequence) for WUS based on the configuration information (S1304). For example, the base station may generate a sequence for WUS based on the index information of the UE group, cell identity (cell identity) information, and/or location information of the WUS resource.
  • the at least one (WUS) sequence may include a WUS sequence (or a UE group WUS sequence) for a UE group (to which a specific terminal (e.g., a UE) to which a paging signal is transmitted) belongs, and also a plurality of UE groups It may also include a WUS sequence (or a common WUS sequence) for.
  • the base station may transmit at least one WUS based on the generated WUS sequence (S1306).
  • at least one WUS may include a WUS (or a UE group WUS or a group WUS) for a UE group (to which a specific terminal (e.g., a UE) to which a paging signal is transmitted) belongs, and also a plurality of UE groups It may also include a WUS sequence (or a common WUS sequence) for.
  • the base station may transmit WUS (or UE group WUS or group WUS or common WUS) to the corresponding UE group(s) based on the WUS sequence (or UE group WUS sequence) for the corresponding UE group(s). .
  • the base station may transmit a paging signal from the PO related to the transmitted WUS (S1308).
  • the paging signal may include a control channel (eg, scrambled with P-RNTI or PDCCH for paging) associated with the paging message.
  • FIG. 14 illustrates a flowchart of a terminal operation to which the method proposed in the present invention can be applied.
  • the terminal may receive configuration information related to the UE group WUS in order to perform the operation of the UE group WUS (S1402). For example, the terminal may receive the configuration information using a higher layer signal (eg, SIB or RRC signaling).
  • a higher layer signal eg, SIB or RRC signaling
  • the terminal may generate at least one sequence (or at least one WUS sequence) for WUS based on the configuration information (S1404).
  • the UE may generate a sequence for WUS based on the index information of the UE group, cell identity information, and/or location information of the WUS resource.
  • the at least one (WUS) sequence may include a WUS sequence (or a UE group WUS sequence) for a UE group to which the UE belongs, and also a WUS sequence (or a common WUS sequence) for a plurality of UE groups to which the UE belongs. It may also include.
  • the terminal may attempt (or monitor) detection of at least one WUS based on the generated WUS sequence (S1406).
  • at least one WUS may include a WUS (or a UE group WUS or a group WUS) for a UE group to which the UE belongs, and a WUS sequence (or a common WUS sequence) for a plurality of UE groups to which the UE belongs It may also include.
  • the UE attempts to detect WUS (or UE group WUS or group WUS or common WUS) for the UE group to which the UE belongs based on the WUS sequence (or UE group WUS sequence) for the UE group (or Monitoring).
  • the terminal may monitor the paging signal in the PO related to the transmitted WUS (S1408). If the terminal does not detect the WUS (S1406), the terminal may not monitor the paging signal in the PO related to the transmitted WUS (or may omit the monitoring of the paging signal) (S1408).
  • the method proposed in the present invention may be applied by selecting some of the following methods.
  • Each of the methods may be operated in an independent form without a separate combination, or one or more methods may be combined and operated in a linked form.
  • Some terms, symbols, and order used for the description of the invention may be replaced with other terms, symbols, and order as long as the principles of the invention are maintained.
  • Method 0 A method in which a specific state is determined according to a characteristic of a terminal or an expected service type, and an operation method of a UE group WUS is determined according to the specific state
  • the method proposed in the present invention may include a method in which a specific state is determined according to a characteristic of a terminal or an expected service type, as in method 0, and an operation method of a UE group WUS is determined according to the specific state.
  • Method 0 may include a process in which the UE reports its characteristics or service type to the MME, and the MME determines whether to assign a specific state of the corresponding UE based on the reported characteristics of the UE. If the MME assigns a specific state to the corresponding terminal, the MME may inform the terminal that the specific state is assigned through a method such as NAS signaling.
  • the characteristics of the terminal or the expected service type may be information based on a paging probability. For example, a required paging probability may be different according to a characteristic of a terminal implemented (eg, restricted power consumption, battery life, complexity, enhanced coverage restricted, etc.) or a service type requested by the terminal.
  • the specific state may be information indicating that the MME has accepted the request of the UE, or state information (eg, state or level) of the UE determined by the MME.
  • the operation of the terminal is the method 1, method 1-1, method 2, method 3, method 4 proposed in the present invention.
  • Method 5, Method 6-1, Method 6-2, or Method 7 may be combined to perform WUS-related operations.
  • the method proposed in the present invention may include a method in which the monitoring period of the common WUS is determined according to a specific state in which the terminal is configured, as in Method 1.
  • the method described in Method 0 may be used for setting according to the specific state.
  • the terminal may determine a period for monitoring the common WUS based on the specific state. For example, consider a case in which a UE that has not been configured with a specific state simultaneously detects a UE group WUS corresponding to a UE group to which the UE belongs and a common WUS corresponding to a plurality of UE groups at the same time every period of the WUS to be monitored. I can.
  • the terminal if the terminal is set to a specific state, the terminal attempts the same detection of the UE group WUS every WUS period, whereas the common WUS does not attempt to detect each time and corresponds to a specific location or specific period. It can be decided to try detection only in case.
  • the location at which the specific period for detecting the common WUS starts may be determined by conditions such as a system frame number (SFN) or a hyper-SFN (H-SFN).
  • the base station may set a common WUS period for the terminals in the specific state and inform the terminal of this.
  • the period information of the common WUS may be transmitted using higher layer signaling (eg, SIB or RRC signaling).
  • SIB higher layer signaling
  • the base station considers the period of the UE group WUS and the period of the common WUS applied to the corresponding terminal.
  • the transmission time of WUS can be determined.
  • the base station wants to transmit the common WUS for the purpose of updating system information (SI), etc.
  • SI system information
  • the transmission time of the WUS is determined in consideration of the transmission period of the common WUS applied to the terminals in the specific state. I can.
  • FIG. 15 schematically shows an example of the method proposed in Method 1.
  • the example in the figure is only one example showing the form in which Method 1 is applied to aid the explanation, and as long as it does not violate the basic principle of the proposed method, a different sized period is used to determine the monitoring position of the common WUS, or a different form. Even when the common WUS monitoring location determination method of is used, the method proposed in Method 1 may be applied.
  • the method proposed in Method 1 may be suitable for the purpose of reducing a period in which the UE unnecessarily wakes up by a common WUS for waking other UEs when the UE has a low paging probability.
  • Method 1-1 Method for determining whether to monitor common WUS according to a specific state in which the terminal is set
  • the method proposed in Method 1-1 may include a method in which the terminal determines whether to monitor the common WUS according to a specific state set in the terminal.
  • the method described in Method 0 may be used for setting according to the specific state.
  • the base station determines whether to support the common WUS. For example, if the base station does not support the common WUS, the base station notifies the terminal of this through higher layer signaling, and the terminal determines whether to monitor the common WUS through this.
  • the present invention extends the concept and proposes a method in which, when a specific state of a terminal is determined through the method described in Method 0, whether to monitor a common WUS is independently determined according to the specific state.
  • the method proposed in Method 1-1 may include a method of not always monitoring the common WUS when the terminal is in a specific state. This may be advantageous when the specific state is set for terminals having a low paging probability. As described in Method 1, since terminals having a low paging probability have a low probability of receiving actual paging information, the probability that the actual common WUS is transmitted for the corresponding terminal may also be relatively low. In consideration of such a case, when it is decided not to monitor the common WUS, the corresponding terminal has the advantage of obtaining a power consumption reduction effect. Not monitoring the common WUS may refer to that the terminal skips monitoring of the common WUS.
  • the method proposed in Method 1-1 may include a method of always monitoring the common WUS when the terminal is in a specific state. This may be advantageous when the specific state is set for terminals having a high paging probability.
  • the probability that the actual common WUS is transmitted for the corresponding terminal may also be relatively high. Therefore, even if the common WUS monitoring of terminals not configured with a specific state is disabled, in the case of terminals with a high paging probability, allowing the common WUS to reduce network overhead of the base station and paging It can be advantageous in terms of reducing paging delay,
  • the method proposed in Method 1-1 is that the base station explicitly informs the terminal of independent common WUS information for terminals in a specific state using higher layer signaling (eg, SIB or RRC signaling), or Alternatively, when the terminal is in a specific state, it may be determined not to always see (or see) the common WUS.
  • higher layer signaling eg, SIB or RRC signaling
  • Method 2 Method for determining UE group WUS resources according to a specific state in which the terminal is configured
  • the method proposed in the present invention may include a method in which the UE group WUS resource is determined according to a specific state set in the terminal as in Method 2.
  • the method described in Method 0 may be used for setting according to the specific state.
  • the terminal may determine the location of the UE group WUS resource that monitors the UE group WUS based on the specific state.
  • the UE may expect both a UE group WUS corresponding to its own UE group and a common WUS corresponding to a plurality of UE groups at the location of the UE group WUS resource to be monitored.
  • the base station may configure a UE group WUS resource for the UEs in the specific state and inform the UE of this.
  • the UE group WUS resource information may be transmitted using higher layer signaling (eg, SIB or RRC signaling).
  • SIB higher layer signaling
  • the base station may transmit WUS to the location of the UE group WUS resource applied to the corresponding terminal.
  • the base station wants to transmit the common WUS for the purpose of updating system information (SI), it may transmit the WUS to the location of the UE group WUS resource applied to the terminals in the specific state.
  • SI system information
  • the location of the UE group WUS resource for the UE in a specific state may be configured to be distinguished from the location of the (UE group) WUS resource configured for UEs not in a specific state while supporting WUS. This may be to prevent UEs in a specific state and UEs not in a specific state from being affected by each other's WUS transmission.
  • WUS resource hopping is performed only between UE group resources for terminals in a specific state (or a terminal not in a specific state). It can be determined to be applied only between the UE group resources for these.
  • FIG. 16 schematically shows an example of the method proposed in Method 2.
  • the example of the figure shows a method of designating a separate UE group WUS resource for UEs having a specific state (eg, low paging probability or high paging probability) in the TDM scheme.
  • the example in the figure is only one example showing the form in which Method 2 is applied to aid the explanation, and as long as it does not violate the basic principle of the proposed method, a different sized cycle is used to determine the monitoring location of the common WUS, or a different form. Even when the common WUS monitoring location determination method of is used, the method proposed in Method 2 can be applied. As an example, the proposed method may be applied even when the FDM scheme is used or the UE group WUS resource is classified because the TDM+FDM scheme is used.
  • the method proposed in Method 2 has an advantage in that it is possible to reduce a case in which the UE unnecessarily wakes up by transmission of WUS to wake up other UEs when the UE has a low paging probability. On the contrary, if the terminal has a high paging probability, there is an advantage in that it is possible to reduce the case where other terminals are unnecessarily wake up by WUS transmission of the corresponding terminal.
  • Method 3 A method of determining a UE group WUS sequence according to a specific state in which the UE is configured
  • the method proposed in the present invention may include a method in which the UE group WUS sequence is determined according to a specific state set in the terminal as in Method 3.
  • the method described in Method 0 may be used for setting according to the specific state.
  • the terminal may determine a WUS sequence for monitoring the UE group WUS based on the specific state.
  • the WUS sequence may be generated based on the information of the UE group considering a specific state, and may also include a form of a common WUS sequence for waking up a plurality of UE groups.
  • the base station may establish a UE group WUS sequence for the UEs in the specific state and inform the UE of the UE group WUS sequence.
  • the UE group WUS sequence information may be transmitted using higher layer signaling (eg, SIB or RRC signaling).
  • SIB higher layer signaling
  • the base station may generate a UE group WUS sequence applied to the corresponding terminal and transmit the WUS.
  • the base station wants to transmit the common WUS for the purpose of updating system information (SI), it may transmit the WUS in consideration of the UE group WUS sequence applied to the terminals in the specific state.
  • SI system information
  • the UE group WUS sequence for a UE in a specific state supports (UE group) WUS, but may be configured to be distinguished from a (UE group) WUS sequence configured for UEs not in a specific state. This may be to prevent UEs in a specific state and UEs not in a specific state from being affected by each other's WUS transmission.
  • the sequence of the common WUS may be set to be the same regardless of whether a specific state is applied.
  • Method 2 if the method is applied to LTE NB-IoT and MTC, the sequence division is to set a separate scrambling initialization value for terminals that have received the configuration information of a specific state, and/ Alternatively, a method of designating a phase shift value may be considered.
  • the method proposed in the present invention may include a method in which the monitoring start time of the UE group WUS is determined according to a specific state set in the terminal as in Method 4.
  • the method described in Method 0 may be used for setting according to the specific state.
  • the WUS defined in LTE NB-IoT and MTC has a structure in which the same subframe is repeatedly transmitted as much as the maximum duration of the WUS.
  • the base station can transmit the WUS shorter than the maximum section in actual transmission by estimating the coverage of the terminal, and the repetitive transmission length of the WUS that can be used at this time is called the actual section of the WUS.
  • the actual section of the WUS is shorter than the maximum section and is defined as a size that satisfies a value of 2 ⁇ n (2 to the power of n). In this case, even if the actual section of the WUS is shorter than the maximum section, the transmission of the WUS is always defined to start in the first subframe of the WUS resource.
  • terminals located in good coverage are WUS for terminals located in relatively poor coverage (terminals that can succeed in detection only when the repetition of WUS is relatively long). Wake up more often may occur. Therefore, if a terminal with a low paging probability can wake up only by transmitting a short WUS, the terminal may wake up more frequently due to transmission of a WUS that is not allocated to itself. Conversely, when a high paging probability terminal requires transmission of a long WUS, a phenomenon in which terminals that can wake up even with a shorter WUS frequently wake up may occur.
  • terminals that have acquired configuration information for a specific state determine a location for monitoring WUS differently from a location where other terminals monitor WUS.
  • terminals that have acquired specific state information may be set to monitor only a partial section of the WUS resource monitored by other terminals.
  • 17 schematically shows an example of the proposed method.
  • terminals in a specific state (low paging probability or high paging probability) are configured to monitor WUS from the middle point of the WUS resource.
  • terminals in a specific state do not affect transmission and reception of a WUS having an actual interval that is less than half the length of the maximum interval during WUS transmission for terminals that do not.
  • a low paging probability terminal performs WUS monitoring corresponding to the shaded area in the figure
  • the corresponding terminal is not affected when the WUS transmission length of terminals not in a specific state is less than half of the maximum interval.
  • WUS transmission for the corresponding terminals is performed unless terminals that are not in a specific state expect to transmit WUS of the maximum section length. Does not affect
  • Method 5 Method for determining whether to apply the UE group WUS of the UE according to a specific state in which the UE is configured
  • the method proposed in the present invention may include a method of determining whether to apply the UE group WUS according to a specific state set in the terminal, as in Method 5.
  • the method described in Method 0 may be used for setting according to the specific state.
  • the method proposed in Method 5 may be a method of performing an operation of a legacy WUS that does not distinguish between UE groups when the UE receives configuration information for a specific state. This may be for the purpose of reducing the effect of a UE in a specific state on other UEs expecting UE group WUS from the same base station. For example, when a specific terminal has a relatively high paging probability compared to other terminals, other terminals expecting the UE group WUS may wake up unnecessarily frequently due to WUS to be transmitted for the corresponding terminal.
  • the base station transmits configuration information of what type of WUS the terminal that has obtained configuration information in a specific state should expect through higher layer signaling (e.g., SIB or RRC signaling).
  • the type may be a legacy WUS or a UE group WUS.
  • the UE group WUS one of the methods proposed in other methods proposed in the present invention may be selected.
  • the method proposed in the present invention may include a method in which whether to apply WUS resource hopping is determined according to the configuration type of the WUS resource, as in Method 6-1.
  • the base station may configure a plurality of WUS resources for the purpose of classifying WUS for multiple terminals.
  • each WUS resource can be orthogonally classified on a time/frequency domain, and due to the difference in position in the time/frequency domain, there is a difference in WUS detection performance or power consumption efficiency. Can occur.
  • a method of hopping WUS resources is currently being discussed in the Rel-16 NB-IoT and MTC standards.
  • the present invention proposes a method of enabling WUS resource hopping without additional signaling overhead by using the necessity and characteristics of WUS resource hopping.
  • Method 6-1 The specific method proposed in Method 6-1 may be one of the following options.
  • Method 6-1-1 The method proposed in Method 6-1 is to perform WUS resource hopping when there are multiple UE group WUS resources corresponding to one PO (e.g., TDM and/or FDM techniques are used). It may include a method of enabling. This means that if the base station operates only one UE group WUS resource corresponding to one PO, explicit signaling to indicate WUS resource hopping is not required. Since this can be applied, it may be to obtain the advantage of not generating a separate signaling overhead.
  • TDM and/or FDM techniques are used.
  • WUS only when the UE group WUS resource corresponding to one PO is divided into multiple in the time domain (eg, when the TDM method is applied). It may include a method of enabling resource hopping.
  • WUS resource hopping may be determined to be disabled. In this case, if a plurality of UE group WUS resources can be classified on the frequency domain, but in the same location on the time domain, WUS resource hopping is disabled.
  • the proposed method has the advantage of enabling WUS resource hopping without increasing signaling overhead only when there is a benefit of WUS resource hopping.
  • 18 schematically shows an example in which the method of option 6-1-2 is applied. In the example of the figure, only four types of WUS resource configuration methods are described, but the principles of the invention can be applied to other types of WUS resource configuration methods in which the TMD/FDM method can be used.
  • the method proposed in the present invention may include a method of determining an order in which a UE (or a UE group) hopping WUS resources when WUS resource hopping is applied as in Method 6-2.
  • the base station may configure a plurality of WUS resources for the purpose of classifying WUS for multiple terminals.
  • each WUS resource may be orthogonally divided on a time/frequency resource, and a difference may occur in terms of performance of WUS detection or power consumption efficiency due to a position difference in the time/frequency domain.
  • a method of hopping WUS resources is currently being discussed in the Rel-16 NB-IoT and MTC standards.
  • the WUS resources may be determined to use a plurality of resources in a time or frequency domain.
  • the terminal reduces the collision effect with transmission of another signal/channel in the downlink (DL) direction, or a diversity gain in the frequency domain. It can be advantageous to get The hopping gain in the frequency domain may be higher as different WUS resources have a larger interval in the frequency domain.
  • all of the different WUS resources divided in the frequency domain such as the structure of the UE group WUS discussed in Rel-16 MTC, exist in the same narrowband, such a gain may be relatively insufficient.
  • WUS resources are divided into a time domain, different WUS resources have different sized actual WUS-to-PO gaps. If the terminal detects WUS in the WUS resource it monitors, it must maintain the standby state in the actual WUS-to-PO gap period in order to monitor the paging PDCCH in the PO, which causes power consumption of the terminal. . Accordingly, a terminal monitoring WUS in a WUS resource having a relatively large WUS-to-PO gap may have a relatively low power consumption efficiency compared to a terminal that does not. Therefore, when WUS resource hopping in the time domain is applied, there is an advantage that all terminals can have an average power consumption efficiency.
  • a method of determining that hopping in the time domain is repeated as often as possible is proposed.
  • a method of performing WUS resource hopping on the basis of first performing time hopping and then performing frequency hopping (or time first frequency second) is Can be used.
  • a structure in which a maximum of two resources (a total of four WUS resources) can be classified on a time domain and a frequency domain may be considered.
  • the UE or UE group selects the WUS resource to be moved through WUS resource hopping if there is a WUS resource having a larger size actual WUS-to-PO gap on the same frequency resource based on the currently located WUS resource. If it does not exist, it may be determined to select a WUS resource having the smallest size actual WUS-to-PO gap existing on another frequency resource as a target to be moved through WUS resource hopping.
  • the direction in which the UE (or UE group) hopping the WUS resource in the time domain in the above proposed method is an example, and the reverse direction (that is, the actual WUS having a smaller size on the same frequency resource based on the currently located WUS resource) is If a WUS resource with a to-PO gap exists, it can be selected as a target to be moved through WUS resource hopping. If it does not exist, it has the largest actual WUS-to-PO gap existing on other frequency resources. Even if the WUS resource is selected as a target to be moved through WUS resource hopping), the effect to be obtained from the proposal of the invention is the same.
  • the proposed method can be expressed using a unique index assigned to each WUS resource.
  • the UE or UE group
  • the UE can be set to select the index of the WUS resource to be hopping in the order of ascending (or descending), and after first time hopping the index of the WUS resource to obtain the effect of the proposed invention It can be assigned in the order of performing frequency hopping (time first and frequency second). 19 schematically shows an example of the proposed method.
  • the method proposed in Method 6-2 can also benefit from the fact that the order of WUS resource hopping can be determined without additional signaling overhead. For example, if the WUS resource hopping pattern according to the above-described principle is fixed by the standard, the UE may know and apply it in advance without additional signaling.
  • the actual form of WUS resource hopping may differ depending on the number of configured WUS resources. However, if the WUS resource hopping pattern is separately designated according to the number of WUS resources and the configuration type, there is little gain to be obtained, and unnecessary complexity of the terminal may increase. To solve this problem, if the method proposed in Method 6-2 is used and the actual used WUS resources are less than the maximum number of configurable WUS resources, the order in which WUS resource hopping is applied is when all configurable WUS resources exist. It is determined based on, and if the WUS resource to be selected does not exist, it can be decided to skip the sequence.
  • the index of the WUS resource is determined as in one of the expression forms of the invention described above, and the order of WUS resource hopping is determined in an ascending (or descending) order of the WUS resource index, the index of the WUS resource is always It is determined to be fixed, and the terminal determines the hopping order based on the index of the WU resource, but if the corresponding WUS resource does not exist, it may be determined to skip the order.
  • 20 schematically shows an example of the proposed method.
  • a pattern of WUS resource allocation that can be used is pre-determined, and a limited signaling bit is set. It may include a method of notifying the terminal by using. Characteristically, the proposed method can be used for the configuration of the UE group WUS resource in MTC.
  • a maximum of four WUS resources may be supported for the purpose of UE grouping.
  • the base station may be determined to be able to designate between at least one and at most four WUS resources in consideration of the network situation and the level of the UE group to be supported.
  • the relative positions between the four WUS resources are predetermined, there are a total of 15 combinations of positions where the WUS resources are allocated. 21 schematically shows an example of 15 combinations. If you want to support all 15 combinations, the necessary signaling overhead is 4 bits.
  • some WUS resource allocation patterns are not actually used. For example, in the case of (d) and (g) in the example of FIG.
  • a communication system 1 applied to the present invention includes a wireless device, a base station, and a network.
  • the wireless device refers to a device that performs communication using a wireless access technology (eg, 5G NR (New RAT), LTE (Long Term Evolution)), and may be referred to as a communication/wireless/5G device.
  • wireless devices include robots 100a, vehicles 100b-1 and 100b-2, eXtended Reality (XR) devices 100c, hand-held devices 100d, and home appliances 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400.
  • the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing inter-vehicle communication, and the like.
  • the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone).
  • UAV Unmanned Aerial Vehicle
  • XR devices include Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality (MR) devices. It can be implemented in the form of a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like.
  • Portable devices may include smart phones, smart pads, wearable devices (eg, smart watches, smart glasses), computers (eg, notebook computers, etc.).
  • Home appliances may include TVs, refrigerators, washing machines, and the like.
  • IoT devices may include sensors, smart meters, and the like.
  • the base station and the network may be implemented as a wireless device, and the specific wireless device 200a may operate as a base station/network node to other
  • 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 communicate directly (eg, sidelink communication) without passing through the base station/network.
  • the vehicles 100b-1 and 100b-2 may perform direct communication (eg, vehicle to vehicle (V2V)/vehicle to everything (V2X) communication).
  • the IoT device eg, sensor
  • the IoT device may directly communicate with other IoT devices (eg, sensors) or other wireless devices 100a to 100f.
  • Wireless communication/connections 150a, 150b, and 150c may be established between the wireless devices 100a to 100f/base station 200, and the base station 200/base station 200.
  • the wireless communication/connection is various wireless communication such as uplink/downlink communication 150a and sidelink communication 150b (or D2D communication), base station communication 150c (e.g., relay, Integrated Access Backhaul (IAB)). It can be achieved through access technology (eg, 5G NR)
  • IAB Integrated Access Backhaul
  • access technology eg, 5G NR
  • wireless communication/connections 150a, 150b, 150c may transmit/receive signals through various physical channels.
  • transmission/reception of radio signals is performed.
  • At least some of a process of setting various configuration information for, a process of various signal processing (eg, channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.), and a resource allocation process may be performed.
  • the first wireless device 100 and the second wireless device 200 may transmit and receive wireless signals through various wireless access technologies (eg, LTE and NR).
  • ⁇ the first wireless device 100, the second wireless device 200 ⁇ is the ⁇ wireless device 100a ⁇ 100f, the base station 200 ⁇ and/or the ⁇ wireless device 100a ⁇ 100f) of FIG. It may correspond to the device (100a ⁇ 100f) ⁇ .
  • the first wireless device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and/or one or more antennas 108.
  • the processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein.
  • the processor 102 may process information in the memory 104 to generate first information/signal, and then transmit a radio signal including the first information/signal through the transceiver 106.
  • the processor 102 may store information obtained from signal processing of the second information/signal in the memory 104 after receiving a radio signal including the second information/signal through the transceiver 106.
  • the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may perform some or all of the processes controlled by the processor 102, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flow charts disclosed herein. It is possible to store software code including:
  • the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
  • the transceiver 106 may be coupled with the processor 102 and may transmit and/or receive radio signals through one or more antennas 108.
  • Transceiver 106 may include a transmitter and/or a receiver.
  • the transceiver 106 may be mixed with an RF (Radio Frequency) unit.
  • the wireless device may mean a communication modem/circuit/chip.
  • the second wireless device 200 includes one or more processors 202 and one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208.
  • the processor 202 controls the memory 204 and/or the 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 radio signal including the fourth information/signal through the transceiver 206 and then store information obtained from signal processing of the fourth information/signal in the memory 204.
  • the memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may perform some or all of the processes controlled by the processor 202, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flow charts disclosed in this document. It is possible to store software code including:
  • the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
  • the transceiver 206 may be connected to the processor 202 and may transmit and/or receive radio signals through one or more antennas 208.
  • the transceiver 206 may include a transmitter and/or a receiver.
  • the transceiver 206 may be used interchangeably 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, 202.
  • one or more processors 102 and 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP).
  • One or more processors 102, 202 may be configured to generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the description, functions, procedures, proposals, methods, and/or operational flow charts disclosed in this document. Can be generated.
  • PDUs Protocol Data Units
  • SDUs Service Data Units
  • One or more processors 102, 202 may generate messages, control information, data, or information according to the description, function, procedure, proposal, method, and/or operational flow chart disclosed herein. At least one processor (102, 202) generates a signal (e.g., a baseband signal) containing PDU, SDU, message, control information, data or information according to the functions, procedures, proposals and/or methods disclosed in this document. , Can be provided to one or more transceivers (106, 206).
  • a signal e.g., a baseband signal
  • One or more processors 102, 202 may receive signals (e.g., baseband signals) from one or more transceivers 106, 206, and the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed herein PDUs, SDUs, messages, control information, data, or information may be obtained according to the parameters.
  • signals e.g., baseband signals
  • One or more of the processors 102 and 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer.
  • One or more of the processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • the description, functions, procedures, suggestions, methods, and/or operational 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 description, functions, procedures, proposals, methods and/or operational flow charts disclosed in this document are configured to perform firmware or software included in one or more processors 102, 202, or stored in one or more memories 104, 204, and It may be driven by the above processors 102 and 202.
  • the descriptions, functions, procedures, proposals, methods, and/or operational flow charts disclosed in this document may be implemented using firmware or software in the form of codes, instructions, and/or sets of instructions.
  • One or more memories 104, 204 may be connected to one or more processors 102, 202, and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions.
  • One or more of the memories 104 and 204 may be composed of ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer readable storage media, and/or combinations thereof.
  • One or more memories 104 and 204 may be located inside and/or outside of one or more processors 102 and 202.
  • one or more memories 104, 204 may be connected to one or more processors 102, 202 through various technologies such as wired or wireless connection.
  • One or more transceivers 106 and 206 may transmit user data, control information, radio signals/channels, and the like mentioned in the methods and/or operation flow charts of this document to one or more other devices.
  • One or more transceivers (106, 206) may receive user data, control information, radio signals/channels, etc., mentioned in the description, functions, procedures, proposals, methods and/or operational flowcharts disclosed in this document from one or more other devices. have.
  • one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and may transmit and receive wireless signals.
  • one or more processors 102, 202 may control one or more transceivers 106, 206 to transmit user data, control information, or radio signals to one or more other devices.
  • one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or radio signals from one or more other devices.
  • one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), one or more transceivers (106, 206) through the one or more antennas (108, 208), the description and functions disclosed in this document.
  • one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
  • One or more transceivers (106, 206) in order to process the received user data, control information, radio signal / channel, etc. using one or more processors (102, 202), the received radio signal / channel, etc. in the RF band signal. It can be converted into a baseband signal.
  • One or more transceivers 106 and 206 may convert user data, control information, radio signals/channels, etc. processed using one or more processors 102 and 202 from a baseband signal to an RF band signal.
  • one or more of the transceivers 106 and 206 may include (analog) oscillators and/or filters.
  • the wireless device may be implemented in various forms according to use-examples/services (see FIG. 22).
  • the wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 23, and various elements, components, units/units, and/or modules ).
  • the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140.
  • the communication unit may include a communication circuit 112 and a transceiver(s) 114.
  • the communication circuit 112 may include one or more processors 102 and 202 and/or one or more memories 104 and 204 of FIG. 23.
  • the transceiver(s) 114 may include one or more transceivers 106,206 and/or one or more antennas 108,208 of FIG. 23.
  • the control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls all operations of the wireless device. For example, the control unit 120 may control the electrical/mechanical operation of the wireless device based on the program/code/command/information stored in the memory unit 130. In addition, the control unit 120 transmits the information stored in the memory unit 130 to an external (eg, other communication device) through the communication unit 110 through a wireless/wired interface, or externally through the communication unit 110 (eg, Information received through a wireless/wired interface from another communication device) may be stored in the memory unit 130.
  • an external eg, other communication device
  • the additional element 140 may be configured in various ways depending on the type of wireless device.
  • the additional element 140 may include at least one of a power unit/battery, an I/O unit, a driving unit, and a computing unit.
  • wireless devices include robots (FIGS. 22, 100a), vehicles (FIGS. 22, 100b-1, 100b-2), XR devices (FIGS. 22, 100c), portable devices (FIGS. 22, 100d), and home appliances.
  • Fig. 22, 100e) IoT device (Fig. 22, 100f), digital broadcasting terminal, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate/environment device, It may be implemented in the form of an AI server/device (FIGS. 22 and 400), a base station (FIGS. 22 and 200), and a network node.
  • the wireless device can be used in a mobile or fixed place depending on the use-example/service.
  • various elements, components, units/units, and/or modules in the wireless devices 100 and 200 may be entirely interconnected through a wired interface, or at least some may be wirelessly connected through the communication unit 110.
  • the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (eg, 130, 140) are connected through the communication unit 110.
  • the control unit 120 and the first unit eg, 130, 140
  • each element, component, unit/unit, and/or module in the wireless device 100 and 200 may further include one or more elements.
  • the control unit 120 may be configured with one or more processor sets.
  • control unit 120 may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphic processing processor, and a memory control processor.
  • memory unit 130 includes random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and/or a combination thereof.
  • Portable devices may include smart phones, smart pads, wearable devices (eg, smart watches, smart glasses), and portable computers (eg, notebook computers).
  • the portable device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).
  • MS mobile station
  • UT user terminal
  • MSS mobile subscriber station
  • SS subscriber station
  • AMS advanced mobile station
  • WT wireless terminal
  • the portable device 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and an input/output unit 140c. ) Can be included.
  • the antenna unit 108 may be configured as a part of the communication unit 110.
  • Blocks 110 to 130/140a to 140c correspond to blocks 110 to 130/140 of FIG. 24, respectively.
  • the communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations.
  • the controller 120 may perform various operations by controlling components of the portable device 100.
  • the controller 120 may include an application processor (AP).
  • the memory unit 130 may store data/parameters/programs/codes/commands required for driving the portable device 100.
  • the memory unit 130 may store input/output data/information, and the like.
  • the power supply unit 140a supplies power to the portable device 100 and may include a wired/wireless charging circuit, a battery, and the like.
  • the interface unit 140b may support connection between the portable device 100 and other external devices.
  • the interface unit 140b may include various ports (eg, audio input/output ports, video input/output ports) for connection with external devices.
  • the input/output unit 140c may receive or output image information/signal, audio information/signal, data, and/or information input from a user.
  • the input/output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.
  • the input/output unit 140c acquires information/signals (eg, touch, text, voice, image, video) input from the user, and the obtained information/signals are stored in the memory unit 130. Can be saved.
  • the communication unit 110 may convert the information/signal stored in the memory into a wireless signal, and may directly transmit the converted wireless signal to another wireless device or to a base station.
  • the communication unit 110 may restore the received radio signal to the original information/signal.
  • the restored information/signal is stored in the memory unit 130, it may be output in various forms (eg, text, voice, image, video, heptic) through the input/output unit 140c.
  • the vehicle or autonomous vehicle may be implemented as a mobile robot, a vehicle, a train, an aerial vehicle (AV), a ship, or the like.
  • AV aerial vehicle
  • the vehicle or autonomous driving vehicle 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit. It may include a unit (140d).
  • the antenna unit 108 may be configured as a part of the communication unit 110.
  • Blocks 110/130/140a to 140d correspond to blocks 110/130/140 of FIG. 24, respectively.
  • the communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with external devices such as other vehicles, base stations (eg, base stations, roadside base stations, etc.), and servers.
  • the controller 120 may perform various operations by controlling elements of the vehicle or the autonomous vehicle 100.
  • the control unit 120 may include an Electronic Control Unit (ECU).
  • the driving unit 140a may cause the vehicle or the autonomous vehicle 100 to travel on the ground.
  • the driving unit 140a may include an engine, a motor, a power train, a wheel, a brake, a steering device, and the like.
  • the power supply unit 140b supplies power to the vehicle or the autonomous vehicle 100, and may include a wired/wireless charging circuit, a battery, and the like.
  • the sensor unit 140c may obtain vehicle status, surrounding environment information, user information, and the like.
  • the sensor unit 140c is an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a position module, and a vehicle advancement. /Reverse sensor, battery sensor, fuel sensor, tire sensor, steering sensor, temperature sensor, humidity sensor, ultrasonic sensor, illuminance sensor, pedal position sensor, etc. can be included.
  • the autonomous driving unit 140d is a technology that maintains a driving lane, a technology that automatically adjusts the speed such as adaptive cruise control, a technology that automatically travels along a predetermined route, and automatically sets a route when a destination is set. Technology, etc. can be implemented.
  • the communication unit 110 may receive map data, traffic information data, and the like from an external server.
  • the autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data.
  • the controller 120 may control the driving unit 140a so that the vehicle or the autonomous vehicle 100 moves along the autonomous driving path according to the driving plan (eg, speed/direction adjustment).
  • the communication unit 110 asynchronously/periodically acquires the latest traffic information data from an external server, and may acquire surrounding traffic information data from surrounding vehicles.
  • the sensor unit 140c may acquire vehicle status and surrounding environment information.
  • the autonomous driving unit 140d may update the autonomous driving route and the driving plan based on the newly acquired data/information.
  • the communication unit 110 may transmit information about a vehicle location, an autonomous driving route, a driving plan, and the like to an external server.
  • the external server may predict traffic information data in advance using AI technology or the like, based on information collected from the vehicle or autonomously driving vehicles, and may provide the predicted traffic information data to the vehicle or autonomously driving vehicles.
  • the present invention can be applied not only to a 3GPP LTE/LTE-A system/5G system (or a new RAT (NR) system) but also to a wireless communication device such as a terminal or a base station operating in various wireless communication systems.
  • a wireless communication device such as a terminal or a base station operating in various wireless communication systems.

Landscapes

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

Abstract

La présente invention concerne un procédé mis en œuvre par un équipement utilisateur (UE) dans un système de communication sans fil prenant en charge un signal d'activation (WUS), et un dispositif associé, le procédé consistant : à recevoir des informations de réglage du WUS ; à déterminer une première séquence d'un WUS de groupe d'UE et une seconde séquence d'un WUS commun sur la base des informations de réglage du WUS ; en fonction du réglage de l'UE sur un état précis, à surveiller le WUS de groupe d'UE sur la base de la première séquence et ne pas surveiller le WUS commun. Selon la présente invention, un signal d'activation peut être émis et reçu de manière efficace.
PCT/KR2020/013103 2019-10-04 2020-09-25 Procédé d'émission et de réception de signal dans un système de communication sans fil et dispositif associé Ceased WO2021066414A1 (fr)

Applications Claiming Priority (4)

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KR10-2019-0122993 2019-10-04
KR20190122993 2019-10-04
KR10-2019-0142126 2019-11-07
KR20190142126 2019-11-07

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115696512A (zh) * 2021-07-21 2023-02-03 大唐移动通信设备有限公司 一种信息传输方法及装置
CN115707103A (zh) * 2021-08-04 2023-02-17 苹果公司 用于降低能力（REDCAP）用户装备的延长非连续接收（eDRX）
CN116321367A (zh) * 2021-12-20 2023-06-23 展讯通信（上海）有限公司 一种通信方法及相关装置
WO2024222555A1 (fr) * 2023-04-25 2024-10-31 维沃移动通信有限公司 Procédé et appareil de traitement de saut de fréquence, et terminal et dispositif côté réseau
WO2025160771A1 (fr) * 2024-01-30 2025-08-07 Zte Corporation Transmissions d'informations communes dans des communications sans fil

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019033112A1 (fr) * 2017-08-11 2019-02-14 Intel Corporation Signalisation de réveil dans des réseaux de télécommunication sans fil
WO2019160496A1 (fr) * 2018-02-16 2019-08-22 Telefonaktiebolaget Lm Ericsson (Publ) Indication de regroupement de dispositifs sans fil à l'aide d'un signal d'activation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019033112A1 (fr) * 2017-08-11 2019-02-14 Intel Corporation Signalisation de réveil dans des réseaux de télécommunication sans fil
WO2019160496A1 (fr) * 2018-02-16 2019-08-22 Telefonaktiebolaget Lm Ericsson (Publ) Indication de regroupement de dispositifs sans fil à l'aide d'un signal d'activation

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
MEDIATEK INC.: "UE-Group WUS in NB-IoT", 3GPP DRAFT; R1-1908747-MEDIATEK-UE-GROUP WUS IN NB-IOT, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, 16 August 2019 (2019-08-16), XP051765355 *
QUALCOMM INCORPORATED: "UE-group wake-up signal for MTC", 3GPP DRAFT; R1-1908825_MWUS UE GROUPING_V1, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, 17 August 2019 (2019-08-17), XP051765433 *
SONY: "On supporting UE group wake up signal for MTC/NB-IoT", 3GPP DRAFT; R2-1913362__SONY__GROUPWUS, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, 3 October 2019 (2019-10-03), XP051791367 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115696512A (zh) * 2021-07-21 2023-02-03 大唐移动通信设备有限公司 一种信息传输方法及装置
CN115707103A (zh) * 2021-08-04 2023-02-17 苹果公司 用于降低能力（REDCAP）用户装备的延长非连续接收（eDRX）
CN116321367A (zh) * 2021-12-20 2023-06-23 展讯通信（上海）有限公司 一种通信方法及相关装置
WO2024222555A1 (fr) * 2023-04-25 2024-10-31 维沃移动通信有限公司 Procédé et appareil de traitement de saut de fréquence, et terminal et dispositif côté réseau
WO2025160771A1 (fr) * 2024-01-30 2025-08-07 Zte Corporation Transmissions d'informations communes dans des communications sans fil

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