WO2018203627A1 - Procédé d'émission et de réception d'un signal dans un système de communication sans fil et dispositif associé - Google Patents

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

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Publication number
WO2018203627A1
WO2018203627A1 PCT/KR2018/004953 KR2018004953W WO2018203627A1 WO 2018203627 A1 WO2018203627 A1 WO 2018203627A1 KR 2018004953 W KR2018004953 W KR 2018004953W WO 2018203627 A1 WO2018203627 A1 WO 2018203627A1
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Prior art keywords
sequence
resource region
signal
root index
specific signal
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PCT/KR2018/004953
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English (en)
Korean (ko)
Inventor
신석민
박창환
안준기
황승계
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엘지전자(주)
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to a method for transmitting and receiving system information in a wireless communication system, and more particularly to a specific signal in a wireless communication system supporting a narrowband internet of things (NB-IoT). A method for transmitting and receiving a signal) and an apparatus supporting the same.
  • NB-IoT narrowband internet of things
  • Mobile communication systems have been developed to provide voice services while ensuring user activity.
  • the mobile communication system has expanded not only voice but also data service.As a result of the explosive increase in traffic, a shortage of resources and users are demanding higher speed services, a more advanced mobile communication system is required. have.
  • the present specification proposes a method for transmitting and receiving a signal in a wireless communication system supporting a narrowband Internet of Things (NB-IoT).
  • NB-IoT narrowband Internet of Things
  • the present specification proposes a method of setting a sequence of a specific signal (eg, a wake up signal or a go-to sleep signal) indicating whether the search region is monitored and a method of mapping the resource region.
  • a specific signal eg, a wake up signal or a go-to sleep signal
  • detecting the specific signal in a predetermined resource region indicates whether or not to monitor a search space of a control channel.
  • the search space is detected. It may include the process of monitoring.
  • the preset resource region is composed of a first resource region and a second resource region, the sequence for the particular signal, the first sequence and the second root based on a first root index (root index)
  • the second sequence may be generated by using a second sequence based on an index, and the first sequence and the second sequence may be mapped to the first resource region and the second resource region, respectively.
  • a root index pair composed of the first root index and the second root index may include an identifier (cell) of a cell that transmits the specific signal. Identifier).
  • the root index pair may further indicate the number of paging occasions (paging occasion) for the terminal to monitor.
  • the root index pair further indicates a user equipment group for monitoring the search area.
  • the search region includes a time unit for a paging occasion, wherein the preset resource region is disposed before the search region. Can be assigned to the specified time unit.
  • the preset resource region may be allocated periodically according to a period of the paging opportunity.
  • the length of an orthogonal cover code applied to the specific signal is It may be determined based on the number of repetitive transmissions.
  • configuration information related to the repetitive transmission may be transmitted through a system information block for each carrier on which the specific signal is transmitted.
  • the preset resource region is composed of 12 subcarriers
  • the first resource region is composed of 0 to 5th subcarriers
  • the second resource region may include 6th to 11th subcarriers.
  • the terminal is a radio frequency (RF) for transmitting and receiving a radio signal Frequency) unit and a processor that is functionally connected with the RF unit.
  • the processor attempts to detect the specific signal in a preset resource region, and the detection of the specific signal indicates whether or not to monitor a search space of a control channel. If is detected, the search space may be controlled to monitor the search space.
  • the preset resource region is composed of a first resource region and a second resource region, the sequence for the particular signal, the first sequence and the second root based on a first root index (root index)
  • the second sequence may be generated by using a second sequence based on an index, and the first sequence and the second sequence may be mapped to the first resource region and the second resource region, respectively.
  • a root index pair composed of the first root index and the second root index may include an identifier (cell) of a cell that transmits the specific signal. Identifier).
  • the root index pair may further indicate the number of paging occasions (paging occasion) for the terminal to monitor.
  • the root index pair may further represent a user equipment group for monitoring the search area.
  • the search region includes a time unit for a paging occasion, and the preset resource region is disposed before the search region. Can be assigned to the specified time unit.
  • the preset resource region is composed of 12 subcarriers
  • the first resource region is composed of 0th to 5th subcarriers
  • the second resource region may include sixth to eleventh subcarriers.
  • the sequence characteristics of the wake up signal and the index constituting the sequence it is possible to deliver additional information (eg, cell identifier, paging opportunity indication information, terminal group indication information, etc.) There is.
  • additional information eg, cell identifier, paging opportunity indication information, terminal group indication information, etc.
  • the CFO can be removed using repeated sequence mapping characteristics and / or cover codes.
  • FIG. 1 illustrates a structure of a radio frame in a wireless communication system to which the present invention can be applied.
  • FIG. 2 is a diagram illustrating a resource grid for one downlink slot in a wireless communication system to which the present invention can be applied.
  • FIG. 3 shows a structure of a downlink subframe in a wireless communication system to which the present invention can be applied.
  • FIG. 4 shows a structure of an uplink subframe in a wireless communication system to which the present invention can be applied.
  • FIG. 5 shows an example of a component carrier and carrier aggregation in a wireless communication system to which the present invention can be applied.
  • FIG. 6 is a diagram illustrating division of cells of a system supporting carrier aggregation.
  • FIG 9 shows an example of a region in which a wake up signal is transmitted and a discovery region associated with NPDCCH to which the method proposed in the present specification can be applied.
  • FIG. 10 shows an example of a method of setting a sequence of wake up signals to which the method proposed in the present specification can be applied.
  • FIG. 11 shows an example of a sequence configuration and mapping scheme of a wake up signal to which the method proposed in the present specification can be applied.
  • FIG. 12 shows another example of a sequence configuration and mapping scheme of a wake up signal to which the method proposed in the present specification can be applied.
  • FIG. 13 is a flowchart illustrating an operation of a terminal receiving a specific signal in a wireless communication system to which the method proposed in this specification can be applied.
  • FIG. 14 illustrates a block diagram of a wireless communication device to which the methods proposed herein can be applied.
  • 15 is a block diagram illustrating a communication device according to one embodiment of the present invention.
  • a base station has a meaning as a terminal node of a network that directly communicates with a terminal.
  • the specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases. That is, it is obvious that various operations performed for communication with a terminal in a network composed of a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station.
  • a 'base station (BS)' may be replaced by terms such as a fixed station, a Node B, an evolved-NodeB (eNB), a base transceiver system (BTS), an access point (AP), and the like. .
  • a 'terminal' may be fixed or mobile, and may include a user equipment (UE), a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), and an AMS ( Advanced Mobile Station (WT), Wireless Terminal (WT), Machine-Type Communication (MTC) Device, Machine-to-Machine (M2M) Device, Device-to-Device (D2D) Device, etc.
  • UE user equipment
  • MS mobile station
  • UT user terminal
  • MSS mobile subscriber station
  • SS subscriber station
  • AMS Advanced Mobile Station
  • WT Wireless Terminal
  • MTC Machine-Type Communication
  • M2M Machine-to-Machine
  • D2D Device-to-Device
  • downlink means communication from a base station to a terminal
  • uplink means communication from a terminal to a base station.
  • a transmitter may be part of a base station, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal and a receiver may be part of a base station.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • GSM global system for mobile communications
  • GPRS general packet radio service
  • EDGE enhanced data rates for GSM evolution
  • OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA).
  • UTRA is part of a universal mobile telecommunications system (UMTS).
  • 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
  • LTE-A (advanced) is the evolution of 3GPP LTE.
  • Embodiments of the present invention may be supported by standard documents disclosed in at least one of IEEE 802, 3GPP, and 3GPP2, which are wireless access systems. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.
  • FIG. 1 illustrates a structure of a radio frame in a wireless communication system to which the present invention can be applied.
  • 3GPP LTE / LTE-A supports a type 1 radio frame structure applicable to frequency division duplex (FDD) and a type 2 radio frame structure applicable to time division duplex (TDD).
  • FDD frequency division duplex
  • TDD time division duplex
  • Type 1A illustrates the structure of a type 1 radio frame.
  • Type 1 radio frames may be applied to both full duplex and half duplex FDD.
  • a radio frame consists of 10 subframes.
  • One subframe consists of two consecutive slots in the time domain, and subframe i consists of slot 2i and slot 2i + 1.
  • the time taken to transmit one subframe is called a transmission time interval (TTI).
  • TTI transmission time interval
  • one subframe may have a length of 1 ms and one slot may have a length of 0.5 ms.
  • uplink transmission and downlink transmission are distinguished in the frequency domain. While there is no restriction on full-duplex FDD, the terminal cannot simultaneously transmit and receive in half-duplex FDD operation.
  • One slot includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols in the time domain and a plurality of resource blocks (RBs) in the frequency domain. Since 3GPP LTE uses OFDMA in downlink, the OFDM symbol is for representing one symbol period. The OFDM symbol may be referred to as one SC-FDMA symbol or symbol period.
  • a resource block is a resource allocation unit and includes a plurality of consecutive subcarriers in one slot.
  • FIG. 1B illustrates a frame structure type 2.
  • an uplink-downlink configuration is a rule indicating whether uplink and downlink are allocated (or reserved) for all subframes.
  • Table 1 shows an uplink-downlink configuration.
  • 'D' represents a subframe for downlink transmission
  • 'U' represents a subframe for uplink transmission
  • 'S' represents a downlink pilot.
  • a special subframe consisting of three fields: a time slot, a guard period (GP), and an uplink pilot time slot (UpPTS).
  • DwPTS is used for initial cell search, synchronization or channel estimation at the terminal.
  • UpPTS is used for channel estimation at the base station and synchronization of uplink transmission of the terminal.
  • GP is a section for removing interference caused in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.
  • the uplink-downlink configuration can be classified into seven types, and the location and / or number of downlink subframes, special subframes, and uplink subframes are different for each configuration.
  • Switch-point periodicity refers to a period in which an uplink subframe and a downlink subframe are repeatedly switched in the same manner, and both 5ms or 10ms are supported.
  • the special subframe S exists every half-frame, and in case of having a period of 5ms downlink-uplink switching time, it exists only in the first half-frame.
  • subframes 0 and 5 and DwPTS are sections for downlink transmission only.
  • the subframe immediately following the UpPTS and the subframe subframe is always an interval for uplink transmission.
  • the uplink-downlink configuration may be known to both the base station and the terminal as system information.
  • the base station may notify the terminal of the change of the uplink-downlink allocation state of the radio frame by transmitting only an index of the configuration information.
  • the configuration information is a kind of downlink control information, which may be transmitted through a physical downlink control channel (PDCCH) like other scheduling information, and is commonly transmitted to all terminals in a cell through a broadcast channel as broadcast information. May be
  • PDCCH physical downlink control channel
  • Table 2 shows the configuration of the special subframe (length of DwPTS / GP / UpPTS).
  • the structure of a radio frame according to the example of FIG. 1 is just one example, and the number of subcarriers included in the radio frame or the number of slots included in the subframe and the number of OFDM symbols included in the slot may vary. Can be.
  • FIG. 2 is a diagram illustrating a resource grid for one downlink slot in a wireless communication system to which the present invention can be applied.
  • one downlink slot includes a plurality of OFDM symbols in the time domain.
  • one downlink slot includes seven OFDM symbols, and one resource block includes 12 subcarriers in a frequency domain, but is not limited thereto.
  • Each element on the resource grid is a resource element, and one resource block (RB) includes 12 ⁇ 7 resource elements.
  • the number N ⁇ DL of resource blocks included in the downlink slot depends on the downlink transmission bandwidth.
  • the structure of the uplink slot may be the same as the structure of the downlink slot.
  • FIG. 3 shows a structure of a downlink subframe in a wireless communication system to which the present invention can be applied.
  • up to three OFDM symbols in the first slot in a subframe are control regions to which control channels are allocated, and the remaining OFDM symbols are data regions to which PDSCH (Physical Downlink Shared Channel) is allocated. data region).
  • PDSCH Physical Downlink Shared Channel
  • An example of a downlink control channel used in 3GPP LTE 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 about the number of OFDM symbols (ie, the size of the control region) used for transmission of control channels within the subframe.
  • the PHICH is a response channel for the uplink and carries an ACK (Acknowledgement) / NACK (Not-Acknowledgement) signal for a hybrid automatic repeat request (HARQ).
  • Control information transmitted through the PDCCH is called downlink control information (DCI).
  • the downlink control information includes uplink resource allocation information, downlink resource allocation information or an uplink transmission (Tx) power control command for a certain terminal group.
  • the PDCCH is a resource allocation and transmission format of DL-SCH (Downlink Shared Channel) (also referred to as a downlink grant), resource allocation information of UL-SCH (Uplink Shared Channel) (also called an uplink grant), and PCH ( Paging information in paging channel, system information in DL-SCH, resource allocation for upper-layer control message such as random access response transmitted in PDSCH, arbitrary terminal It may carry a set of transmission power control commands for the individual terminals in the group, activation of Voice over IP (VoIP), and the like.
  • the plurality of PDCCHs may be transmitted in the control region, and the terminal may monitor the plurality of PDCCHs.
  • the PDCCH consists of a set of one or a plurality of consecutive CCEs.
  • CCE is a logical allocation unit used to provide a PDCCH with a coding rate according to the state of a radio channel.
  • the CCE corresponds to a plurality of resource element groups.
  • the format of the PDCCH and the number of available bits of the PDCCH are determined according to the association between the number of CCEs and the coding rate provided by the CCEs.
  • the base station determines the PDCCH format according to the DCI to be transmitted to the terminal, and attaches a CRC (Cyclic Redundancy Check) to the control information.
  • the CRC is masked with a unique identifier (referred to as RNTI (Radio Network Temporary Identifier)) according to the owner or purpose of the PDCCH.
  • RNTI Radio Network Temporary Identifier
  • a unique identifier of the terminal for example, a C-RNTI (Cell-RNTI) may be masked to the CRC.
  • a paging indication identifier for example, P-RNTI (P-RNTI) may be masked to the CRC.
  • the system information more specifically, the PDCCH for the system information block (SIB), the system information identifier and the system information RNTI (SI-RNTI) may be masked to the CRC.
  • SI-RNTI system information RNTI
  • RA-RNTI random access-RNTI
  • Enhanced PDCCH carries UE-specific signaling.
  • the EPDCCH is located in a physical resource block (PRB) that is UE-specifically configured.
  • PRB physical resource block
  • the PDCCH may be transmitted in up to three OFDM symbols in the first slot in the subframe, but the EPDCCH may be transmitted in a resource region other than the PDCCH.
  • the start time (ie, symbol) of the EPDCCH in the subframe may be configured in the terminal through higher layer signaling (eg, RRC signaling, etc.).
  • EPDCCH is a transport format associated with the DL-SCH, resource allocation and HARQ information, a transport format associated with the UL-SCH, resource allocation and HARQ information, resource allocation associated with Side-link Shared Channel (SL-SCH) and Physical Sidelink Control Channel (PSCCH) Can carry information, etc.
  • Multiple EPDCCHs may be supported and the UE may monitor a set of EPCCHs.
  • the EPDCCH may be transmitted using one or more consecutive enhanced CCEs (ECCEs), and the number of ECCEs per single EPDCCH may be determined for each EPDCCH format.
  • ECCEs enhanced CCEs
  • Each ECCE may be composed of a plurality of enhanced resource element groups (EREGs).
  • EREG is used to define the mapping of ECCE to RE.
  • the terminal may monitor the plurality of EPDCCHs. For example, one or two EPDCCH sets in one PRB pair in which the UE monitors EPDCCH transmission may be configured.
  • the EPCCH may use localized transmission or distributed transmission, so that the mapping of ECCE to the RE in the PRB may be different.
  • FIG. 4 shows a structure of an uplink subframe in a wireless communication system to which the present invention can be applied.
  • an uplink subframe may be divided into a control region and a data region in the frequency domain.
  • a physical uplink control channel (PUCCH) carrying uplink control information is allocated to the control region.
  • the data region is allocated a Physical Uplink Shared Channel (PUSCH) that carries user data.
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • a PUCCH for one UE is allocated a resource block (RB) pair in a subframe.
  • RBs belonging to the RB pair occupy different subcarriers in each of the two slots.
  • This RB pair allocated to the PUCCH is said to be frequency hopping at the slot boundary (slot boundary).
  • the communication environment considered in the embodiments of the present invention includes both multi-carrier support environments. That is, the multicarrier system or carrier aggregation (CA) system used in the present invention is one or more having a bandwidth smaller than the target band when configuring the target broadband to support the broadband A system that aggregates and uses a component carrier (CC).
  • CA carrier aggregation
  • the multi-carrier means the aggregation of carriers (or carrier aggregation), wherein the aggregation of carriers means not only merging between contiguous carriers but also merging between non-contiguous carriers.
  • the number of component carriers aggregated between downlink and uplink may be set differently.
  • the case where the number of downlink component carriers (hereinafter referred to as 'DL CC') and the number of uplink component carriers (hereinafter referred to as 'UL CC') is the same is called symmetric aggregation. This is called asymmetric aggregation.
  • Such carrier aggregation may be used interchangeably with terms such as carrier aggregation, bandwidth aggregation, spectrum aggregation, and the like.
  • Carrier aggregation in which two or more component carriers are combined, aims to support up to 100 MHz bandwidth in an LTE-A system.
  • the bandwidth of the combining carrier may be limited to the bandwidth used by the existing system to maintain backward compatibility with the existing IMT system.
  • the existing 3GPP LTE system supports ⁇ 1.4, 3, 5, 10, 15, 20 ⁇ MHz bandwidth
  • the 3GPP LTE-advanced system i.e., LTE-A
  • Only bandwidths can be used to support bandwidths greater than 20 MHz.
  • the carrier aggregation system used in the present invention may support carrier aggregation by defining a new bandwidth regardless of the bandwidth used in the existing system.
  • the LTE-A system uses the concept of a cell to manage radio resources.
  • the carrier aggregation environment described above may be referred to as a multiple cell environment.
  • a cell is defined as a combination of a downlink resource (DL CC) and an uplink resource (UL CC), but the uplink resource is not an essential element. Accordingly, the cell may be configured with only downlink resources or with downlink resources and uplink resources.
  • DL CC downlink resource
  • UL CC uplink resource
  • the cell may be configured with only downlink resources or with downlink resources and uplink resources.
  • a specific UE When a specific UE has only one configured serving cell, it may have one DL CC and one UL CC, but when a specific UE has two or more configured serving cells, as many DLs as the number of cells Has a CC and the number of UL CCs may be the same or less.
  • the DL CC and the UL CC may be configured on the contrary. That is, when a specific UE has a plurality of configured serving cells, a carrier aggregation environment in which a UL CC has more than the number of DL CCs may be supported. That is, carrier aggregation may be understood as merging two or more cells, each having a different carrier frequency (center frequency of a cell).
  • carrier aggregation may be understood as merging two or more cells, each having a different carrier frequency (center frequency of a cell).
  • the term 'cell' should be distinguished from the 'cell' as an area covered by a generally used base station.
  • Cells used in the LTE-A system include a primary cell (PCell: Primary Cell) and a secondary cell (SCell: Secondary Cell).
  • PCell Primary Cell
  • SCell Secondary Cell
  • P cell and S cell may be used as a serving cell.
  • the UE that is in the RRC_CONNECTED state but the carrier aggregation is not configured or does not support the carrier aggregation, there is only one serving cell composed of the PCell.
  • one or more serving cells may exist, and the entire serving cell includes a PCell and one or more SCells.
  • Serving cells may be configured through an RRC parameter.
  • PhysCellId is a cell's physical layer identifier and has an integer value from 0 to 503.
  • SCellIndex is a short identifier used to identify an SCell and has an integer value from 1 to 7.
  • ServCellIndex is a short identifier used to identify a serving cell (P cell or S cell) and has an integer value from 0 to 7. A value of 0 is applied to the Pcell, and SCellIndex is pre-assigned to apply to the Scell. That is, a cell having the smallest cell ID (or cell index) in ServCellIndex becomes a P cell.
  • P cell refers to a cell operating on a primary frequency (or primary CC).
  • the UE may be used to perform an initial connection establishment process or to perform a connection re-establishment process, and may also refer to a cell indicated in a handover process.
  • the P cell refers to a cell serving as a center of control-related communication among serving cells configured in a carrier aggregation environment. That is, the terminal may receive and transmit a PUCCH only in its own Pcell, and may use only the Pcell to acquire system information or change a monitoring procedure.
  • E-UTRAN Evolved Universal Terrestrial Radio Access
  • RRC ConnectionReconfigutaion message of a higher layer including mobility control information to a UE supporting a carrier aggregation environment. It may be.
  • the S cell may refer to a cell operating on a secondary frequency (or, secondary CC). Only one PCell may be allocated to a specific UE, and one or more SCells may be allocated.
  • the SCell is configurable after the RRC connection is established and can be used to provide additional radio resources.
  • PUCCH does not exist in the remaining cells excluding the P cell, that is, the S cell, among the serving cells configured in the carrier aggregation environment.
  • the E-UTRAN adds the SCell to the UE supporting the carrier aggregation environment, the E-UTRAN may provide all system information related to the operation of the related cell in the RRC_CONNECTED state through a dedicated signal.
  • the change of the system information may be controlled by the release and addition of the related SCell, and at this time, an RRC connection reconfigutaion message of a higher layer may be used.
  • the E-UTRAN may perform dedicated signaling having different parameters for each terminal, rather than broadcasting in the related SCell.
  • the E-UTRAN may configure a network including one or more Scells in addition to the Pcells initially configured in the connection establishment process.
  • the Pcell and the SCell may operate as respective component carriers.
  • the primary component carrier (PCC) may be used in the same sense as the PCell
  • the secondary component carrier (SCC) may be used in the same sense as the SCell.
  • FIG. 5 shows an example of a component carrier and carrier aggregation in a wireless communication system to which the present invention can be applied.
  • Component carriers include a DL CC and an UL CC.
  • One component carrier may have a frequency range of 20 MHz.
  • FIG. 5 (b) shows a carrier aggregation structure used in the LTE_A system.
  • three component carriers having a frequency size of 20 MHz are combined.
  • the number of DL CCs and UL CCs is not limited.
  • the UE may simultaneously monitor three CCs, receive downlink signals / data, and transmit uplink signals / data.
  • the network may allocate M (M ⁇ N) DL CCs to the UE.
  • the UE may monitor only M limited DL CCs and receive a DL signal.
  • the network may assign L (L ⁇ M ⁇ N) DL CCs to allocate a main DL CC to the UE, in which case the UE must monitor the L DL CCs. This method can be equally applied to uplink transmission.
  • the linkage between the carrier frequency (or DL CC) of the downlink resource and the carrier frequency (or UL CC) of the uplink resource may be indicated by a higher layer message or system information such as an RRC message.
  • a combination of DL resources and UL resources may be configured by a linkage defined by SIB2 (System Information Block Type2).
  • SIB2 System Information Block Type2
  • the linkage may mean a mapping relationship between a DL CC on which a PDCCH carrying a UL grant is transmitted and a UL CC using the UL grant, and a DL CC (or UL CC) and HARQ ACK on which data for HARQ is transmitted. It may mean a mapping relationship between UL CCs (or DL CCs) through which a / NACK signal is transmitted.
  • FIG. 6 is a diagram illustrating division of cells of a system supporting carrier aggregation.
  • a configured cell may be configured for each UE as a cell capable of merging carriers based on a measurement report among cells of a base station as shown in FIG. 5.
  • the configured cell may reserve resources for ack / nack transmission in advance for PDSCH transmission.
  • An activated cell is a cell configured to actually transmit PDSCH / PUSCH among configured cells, and performs channel state information (CSI) reporting and sounding reference signal (SRS) transmission for PDSCH / PUSCH transmission.
  • CSI channel state information
  • SRS sounding reference signal
  • a de-activated cell is a cell that does not transmit PDSCH / PUSCH by a command or timer operation of a base station and may also stop CSI reporting and SRS transmission.
  • a master information block (MIB) and / or system information block is provided through a narrowband physical broadcast channel (NPBCH) and / or a narrowband physical downlink shared channel (NPDSCH).
  • NNBCH narrowband physical broadcast channel
  • NPDSCH narrowband physical downlink shared channel
  • SIB may be transmitted.
  • Scrambling for the NPBCH should be performed with M bits indicating the number of bits to be transmitted on the NPBCH.
  • modulation on the NPBCH may be performed according to a quadrature phase shift keying (QPSK) scheme.
  • QPSK quadrature phase shift keying
  • the UE may assume that the antenna ports R 2000 and R 2001 are used for transmitting the NPBCH.
  • mapping NPBCH to resource elements complex-valued symbols for each antenna port.
  • the block is mapped to resource elements (k, l) in a sequence starting with y (0).
  • the mapping for resource elements that are not reserved for transmission of a reference signal is performed by first increasing in the order of index k and then increasing in the order of index l. After mapping to a subframe, in the next radio frame Before continuing to subframe 0 of, the subframe is repeated in subframe 0 of the next seven radio frames. In this case, the first three OFDM symbols of the subframe are not used in the mapping process.
  • n s means the first slot of the codeword transmission.
  • modulation on the NPDSCH may be performed according to the QPSK scheme.
  • layer mapping and precoding for the NPDSCH may be performed according to the same antenna port as the NPBCH.
  • the NPDSCH may be mapped to one or more subframes.
  • the block of may be mapped to resource elements (k, l) that satisfy all of the following criteria in the current subframe.
  • the UE does not expect the NPDSCH in the subframe i when it is not the NB-IoT DL subframe except for the transmission of the NPDSCH transmitting the SystemInformationBlockType1-NB in the fifth subframe of the radio frame (subframe # 4).
  • the NPDSCH transmission is delayed until the next NB-IoT DL subframe.
  • the synchronization signal may be classified into a narrowband primary synchronization signal (NPSS) and a narrowband secondary synchronization signal (NSSS).
  • NPSS narrowband primary synchronization signal
  • NSSS narrowband secondary synchronization signal
  • 504 unique physical layer identifiers may be indicated by the NSSS.
  • the sequence d l (n) used for NPSS may be generated from a Zadoff-Chu sequence on the frequency domain according to Equation (1).
  • Equation 1 the Zadoff-Chu root sequence index u is 5, and S (l) values for different symbol indexes l may be given by Table 3.
  • Table 3 shows the definition of the S (l) value.
  • the sequence used for NPSS may be mapped to resource element (s) in the following manner.
  • the same antenna port needs to be used for all symbols of the NPSS in the subframe.
  • the terminal cannot assume that the NPSS is transmitted through the same antenna port as any downlink reference signal.
  • the UE cannot assume that NPSS transmission in a given subframe uses the same antenna port (s) as NPSS in any other subframe.
  • the sequence d l (n) is mapped to the resource element (k, l) in subframe # 5 of every radio frame (i.e., frame), and the sequence d l (n) is mapped in the order of increasing index k. After that, the index l may be mapped in increasing order.
  • the corresponding sequence element d (n) is not used for NPSS, but may be counted in a mapping procedure.
  • sequence d (n) used for NSSS may be generated from the Zadoff-Chu sequence on the frequency domain according to Equation (2).
  • equation (2) the binary sequence b q (m) is given by Table 4 and the cyclic shift in frame number n f Is given by equation (3).
  • the sequence used for NSSS may be mapped to resource element (s) in the following manner.
  • the same antenna port needs to be used for all symbols of NSSS in a subframe.
  • the UE cannot assume that the NSSS is transmitted through the same antenna port as any downlink reference signal.
  • the terminal cannot assume that the NSSS transmission in a given subframe uses the same antenna port (s) as the NSSS in any other subframe.
  • the sequence d (n) is sequentially mapped from d (0) to resource elements (k, l). At this time, the sequence d (n) is the last allocated after that, in the order of increasing the first index k over 12 assigned subcarriers, in subframe # 9 of the radio frame.
  • the index l may be mapped in increasing order over the symbol.
  • the corresponding sequence element d (n) is not used for NSSS, but may be counted in a mapping procedure.
  • the MasterInformationBlock-NB uses fixed scheduling with a period of 640 ms, and repetitive transmission is performed within 640 ms.
  • the transmission is arranged in eight independently decodable blocks of 80 ms duration.
  • SIB1-NB SystemInformationBlockType1-NB
  • SIB1-NB uses fixed scheduling with a period of 2560 ms. SIB1-NB transmission occurs in subframe # 4 of all other frames in 16 consecutive frames. The start frame for the first transmission of the SIB1-NB can be derived from the cell PCID and the number of repetitions in the 2560ms period, and are repeated at the same interval in the 2560ms period. Transmission Block Size (TBS) for SystemInformationBlockType1-NB and repetition within 2560ms are indicated in the schedulingInfoSIB1 field of the MIB-NB.
  • TBS Transmission Block Size
  • Table 6 shows an example of the MIB used in the NB-IoT system.
  • Table 7 shows an example of SIB type 1 used in the NB-IoT system.
  • Table 8 shows an example of the number of repetitions for the NPDSCH carrying SIB type 1.
  • Table 9 shows an example of a starting radio frame for the first transmission of the NPDSCH carrying SIB type 1.
  • Table 10 shows an example of a transport block size (TBS) for NPDSCH carrying SIB type 1.
  • NPDCCH narrowband physical downlink control channel
  • the UE needs to monitor NPDCCH candidates (ie, set of NPDCCH candidates) as set by higher layer signaling for control information.
  • the monitoring may mean trying to decode respective NPDCCHs in the set according to all DCI formats monitored.
  • the set of NPDCCH candidates for monitoring may be defined as an NPDCCH search space.
  • the UE may perform monitoring using an identifier (eg, C-RNTI, P-RNTI, SC-RNTI, G-RNTI) corresponding to the corresponding NPDCCH search region.
  • the terminal may include a) Type1-NPDCCH common search space, b) Type2-NPDCCH common search space, and c) NPDCCH terminal-specific search region (NPDCCH).
  • NPDCCH NPDCCH terminal-specific search region
  • the terminal does not need to simultaneously monitor the NPDCCH terminal-specific search region and the Type1-NPDCCH common search region.
  • the terminal does not need to simultaneously monitor the NPDCCH terminal-specific search region and the Type2-NPDCCH common search region.
  • the UE does not need to simultaneously monitor the Type1-NPDCCH common search area and the Type2-NPDCCH common search area.
  • the NPDCCH search region at an aggregation level and a repetition level is defined by a set of NPDCCH candidates.
  • each of the NPDCCH candidates is repeated in R consecutive NB-IoT downlink subframes except for the subframe used for transmission of a system information (SI) message starting at subframe k.
  • SI system information
  • the aggregation and repetition levels defining the discovery region and the corresponding monitored NPDCCH candidates are determined by substituting the R MAX value with the parameter al-Repetition-USS set by the higher layer. It is listed as 11.
  • the aggregation and repetition levels defining the search region and the corresponding monitored NPDCCH candidates replace the R MAX value with the parameter al-Repetition-CSS-Paging set by the higher layer.
  • the aggregation and repetition levels defining the search region and the corresponding monitored NPDCCH candidates replace the R MAX value with the parameter npdcch-MaxNumRepetitions-RA set by the higher layer, as shown in Table 13 Listed.
  • k k b .
  • k b denotes a b-th consecutive NB-IoT downlink subframe from subframe k0, where b is ux R and u is 0, 1, ... (R MAX / R) -1 Means.
  • the subframe k0 means a subframe satisfying Equation 4.
  • G shown in Equation 4 is given by the higher layer parameter nPDCCH-startSF-UESS, Is given by the upper layer parameter nPDCCH-startSFoffset-UESS.
  • G shown in Equation 4 is given by higher layer parameter nPDCCH-startSF-Type2CSS, Is given by the upper layer parameter nPDCCH-startSFoffset-Type2CSS.
  • k is k0 and is determined from the position of the NB-IoT paging opportunity subframe.
  • the terminal When the terminal is set by the upper layer as a PRB for monitoring the NPDCCH terminal-specific light color area, the terminal should monitor the NPDCCH terminal-specific search area in the PRB set by the higher layer. In this case, the terminal does not expect to receive NPSS, NSSS, and NPBCH in the corresponding PRB. On the other hand, if the PRB is not set by the higher layer, the terminal should monitor the NPDCCH terminal-specific search area in the same PRB as the NPSS / NSSS / NPBCH is detected.
  • the NB-IoT UE When the NB-IoT UE detects an NPDCCH having DCI format N0 (DCI format N0) ending in subframe n, and when transmission of the corresponding NPUSCH format 1 starts in subframe n + k, the UE Does not need to monitor the NPDCCH of any subframe starting in the range from subframe n + 1 to subframe n + k-1.
  • DCI format N0 DCI format N0
  • the NB-IoT terminal detects an NPDCCH having DCI format N1 or DCI format N2 ending in subframe n, and transmission of the corresponding NPDSCH starts in subframe n + k.
  • the UE does not need to monitor the NPDCCH of any subframe starting from the subframe n + 1 to the subframe n + k-1.
  • the NB-IoT UE detects an NPDCCH having DCI format N1 ending in subframe n, and when transmission of the corresponding NPUSCH format 2 starts in subframe n + k, the UE sub-starts from subframe n + 1. It is not necessary to monitor the NPDCCH of any subframe starting in the range up to frame n + k-1.
  • the NB-IoT UE detects an NPDCCH having the DCI format N1 for the "PDCCH order" ending in subframe n, and when transmission of the corresponding NPRACH starts in subframe n + k, the UE Does not need to monitor the NPDCCH of any subframe starting in the range from subframe n + 1 to subframe n + k-1.
  • the UE when the NB-IoT UE has NPUSCH transmission ending in subframe n, the UE does not need to monitor the NPDCCH of any subframe starting in the range of subframe n + 1 to subframe n + 3. .
  • the NB-IoT terminal may be configured as an NPDCCH candidate of the NPDCCH discovery region. There is no need to monitor NPDCCH candidates.
  • the starting OFDM symbol for the NPDCCH is given by index l NPDCCHStart , in the first slot of subframe k.
  • the index l NPDCCHStart is given by the upper layer parameter eutaControlRegionSize.
  • the index l NPDCCHStart is 0.
  • DCI Format Downlink Control Information Format
  • DCI transmits downlink or uplink scheduling information for one cell and one RNTI.
  • RNTI is implicitly encoded in CRC.
  • DCI format N0 DCI format N0
  • DCI format N1 DCI format N1
  • DCI format N2 DCI format N2
  • DCI format N0 is used for scheduling NPUSCH in one cell and may transmit the following information.
  • a flag for distinguishing between format N0 and format N1 (eg 1 bit), where value 0 may indicate format N0 and value 1 may indicate format N1.
  • Subcarrier indication (eg 6 bits)
  • Repetition number (e.g. 3 bits)
  • New data indicator (e.g. 1 bit)
  • DCI subframe repetition number (eg 2 bits)
  • DCI format N1 is used for the random access procedure initiated by scheduling of one NPDSCH codeword in one cell and NPDCCH order.
  • the DCI corresponding to the NPDCCH order may be carried by the NPDCCH.
  • the DCI format N1 may transmit the following information.
  • a flag for distinguishing between format N0 and format N1 (eg 1 bit), where value 0 may indicate format N0 and value 1 may indicate format N1.
  • the format N1 has a random access procedure initiated by the NPDCCH sequence only when the NPDCCH order indicator is set to '1', the cyclic redundancy check (CRC) of the format N1 is scrambled to C-RNTI, and all other fields are set as follows. Used for
  • Subcarrier indication of PRACH (eg 6 bits)
  • Repetition number (eg 4 bits)
  • New data indicator (e.g. 1 bit)
  • DCI subframe repetition number (eg 2 bits)
  • DCI format N2 is used for paging and direct indication, and may transmit the following information.
  • a flag (eg 1 bit) for distinguishing paging from direct indication, where value 0 may indicate direct indication and value 1 may indicate paging.
  • DCI format N2 is reserved information bits (reserved information bits for setting the same size as direct indication information (eg, 8 bits), format N2 having a flag value of 1). information bits).
  • the DCI format N2 is used for resource allocation (e.g., 3 bits), modulation and coding scheme (e.g., 4 bits), repetition number (e.g., 4 bits), DCI subframe repetition number ( For example, 3 bits).
  • resource allocation e.g., 3 bits
  • modulation and coding scheme e.g., 4 bits
  • repetition number e.g., 4 bits
  • DCI subframe repetition number For example, 3 bits.
  • a total of four CSS types may be considered for the common search area (CSS). Specifically, there may be Type 1 CSS for paging, Type 1A CSS for SC-MCCH, Type 2 CSS for Random Access Response (RAR), and Type 2A CSS for SC-MTCH. In this case, four CSS types may be classified into two types according to a decoding method.
  • a UE monitoring Type 1 CSS and Type 1A CSS receives an R max value from an upper end and attempts blind decoding (BD) on all candidates that may have from the R max value. can do.
  • BD blind decoding
  • Table 14 shows an example of CSS candidates for Type 1 / 1A NPDCCH.
  • the R max value when the R max value is 8, there may be a total of four cases of repetition number (R) that the actual NPDCCH may have, such as 1, 2, 4, and 8. That is, when the R max value is 8, the number of NPDCCH candidates (that is, the number of NPDCCHs for which the UE attempts BD) may be set to four.
  • the number of R values for each R max is limited to a maximum of eight (that is, the number of NPDCCH candidates is limited to a maximum of eight)
  • the R max value is 256 or more
  • the corresponding R Some R values among candidate R values that the max value may have may be excluded. For example, if the R max value is 512, ⁇ 2, 8 ⁇ is excluded from the R values ⁇ 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 ⁇ that are supported by the corresponding Rmax value. Can be.
  • the UE may not know in which candidate (s) the NPDCCH is to be transmitted. However, since the start position is always the same, the UE may perform the BD using one buffer.
  • information for example, 3 bits
  • indicating a repetition number value of the corresponding NPDCCH may be included in the DCI format.
  • the base station may be configured to select and transmit one of the NPDCCH candidates 702 to 708.
  • the UE may perform BD for cases in which the R values are 1, 2, 4, and 8.
  • the base station may select one of a total of four different NPDCCH candidates and transmit the NPDCCH.
  • NPDCCH candidate 702 indicates a candidate when R is 1
  • NPDCCH candidate 704 indicates a candidate when R is 2
  • NPDCCH candidate 706 indicates a candidate when R is 4
  • NPDCCH candidate 708 indicates R The candidate in the case of 8 can be shown.
  • the UE monitoring the Type 2 CSS and the Type 2A CSS may receive an R max value from an upper end and attempt a BD for all candidates that may have from the R max value.
  • the values shown in Table 15 may be referred to.
  • Table 15 shows CSS candidates for Type 2 / 2A NPDCCH.
  • the total number of repetitions R that the actual NPDCCH may have may exist in total of 4 cases, such as 1, 2, 4, and 8.
  • the number of NPDCCH candidates may refer to the number of NPDCCHs to which the UE attempts BD.
  • the UE includes one NPDCCH candidate corresponding to R max , two NPDCCH candidates corresponding to R max / 2, four NPDCCH candidates corresponding to R max / 4, and R BD may be performed on eight NPDCCH candidates corresponding to max / 8.
  • the UE may not know in which candidate (s) the NPDCCH will be transmitted, but may perform BD using different buffers (maximum of four).
  • information for example, 2 bits
  • indicating a repetition number value of the corresponding NPDCCH may be included in the DCI format.
  • the base station may be configured to select and transmit one of the NPDCCH candidates 802 to 830.
  • the UE may perform BD for cases where R values are R max , R max / 2, R max / 4, and R max / 8.
  • NPDCCH candidates 802 to 816 represent eight different candidates when R is 1
  • NPDCCH candidates 818 to 824 represent four different candidates when R is 2
  • NPDCCH candidates 826 and 828 are R
  • Two different candidates in the case of 4 may be represented, and the NPDCCH candidate 830 may represent one candidate in the case where R is 8.
  • the number of candidates ie, NPDCCH candidates
  • the maximum number of buffers to be used may be set differently between the Type 1 / 1A CSS and the Type 2 / 2A CSS.
  • the maximum number of buffers may vary depending on the implementation of the terminal.
  • Narrowband (NB) -LTE is a system for supporting low complexity, low power consumption with a system BW corresponding to 1 Physical Resource Block (PRB) of the LTE system.
  • PRB Physical Resource Block
  • the NB-LTE system may be mainly used as a communication method for supporting a device such as a machine-type communication (MTC) terminal and / or an IoT terminal in a cellular system. That is, the NB-LTE system may be referred to as an NB-IoT system.
  • MTC machine-type communication
  • IoT IoT terminal
  • the NB-IoT system does not need to allocate an additional band for the NB-IoT system by using the same OFDM system as the OFDM parameters such as subcarrier spacing used in the existing LTE system.
  • the OFDM parameters such as subcarrier spacing used in the existing LTE system.
  • assigning 1 PRB of the legacy LTE system band for NB-IoT there is an advantage that the frequency can be used efficiently.
  • the physical channel of the NB-IoT system is N-Primary Synchronization Signal (N-PSS) / N-Secondary Synchronization Signal (N-SSS), N-Physical Broadcast Channel (N-PBCH), N-PDCCH It may be defined as / N-EPDCCH, N-PDSCH and the like.
  • N-PSS N-Primary Synchronization Signal
  • N-SSSS N-Secondary Synchronization Signal
  • N-PBCH N-Physical Broadcast Channel
  • N-PDCCH N-PDCCH It may be defined as / N-EPDCCH, N-PDSCH and the like.
  • 'N-' may be used to distinguish it from legacy LTE.
  • a method of reducing battery consumption of the terminal may be considered by setting a signal indicating a wake up or go-to sleep of the terminal for a paging occasion.
  • the paging opportunity may mean a time when the paging signal according to the paging period is expected to be transmitted.
  • a signal indicating wake up of the terminal may be referred to as a wake up signal (WUS), and a signal indicating go-to sleep may be referred to as a go-to sleep signal.
  • the wake up signal or the go-to sleep signal may be set to be transmitted to a preset resource region (eg, a part of a paging opportunity).
  • the preset resource region may be periodically set according to a paging opportunity or may be periodically set separately from the paging opportunity.
  • the terminal may be configured to wake up or go-to sleep before the paging opportunity.
  • the method proposed herein will be described based on the wake up signal.
  • the setting and method for the wake up signal may be applied to the go-to sleep signal in the same or similar manner.
  • the terminal when the above wake up signal is used, power consumption of the terminal may be reduced. Specifically, when the wake up signal is not used, the UE needs to monitor CSS for every paging opportunity. However, when the wake up signal is used, the terminal may be configured to monitor the CSS only when the wake up signal is detected in the preset resource region.
  • the operation of monitoring the preset resource region in order for the terminal to detect the wake up signal may be less power consumption than the operation of monitoring the CSS described above. That is, the power consumption of the terminal may be reduced than in the case of decoding the above-described CSS.
  • the decoding processing time of the terminal is required, but in the case of the wake up signal, since the signal is transmitted in the form of a sequence, the terminal only needs to determine whether it is detected in a specific region.
  • An example of a region where a wake up signal is transmitted and a search region for the NPDCCH may be illustrated in FIG. 9.
  • 9 shows an example of a region in which a wake up signal is transmitted and a discovery region associated with NPDCCH to which the method proposed in the present specification can be applied. 9 is for illustration only and does not limit the scope of the invention.
  • the PO indicates a paging opportunity subframe determined from a higher layer, and in this example, it is assumed that the PO is set to 2560 subframes. In addition, it is assumed that an R max value of Type 1 CSS is set to 256, and an R max value (ie, a maximum duration) for the wake up signal is set to 1/8.
  • a resource region (eg, wake up signal duration) for the wake up signal may be located before Type 1 CSS corresponding to each paging opportunity.
  • a value (eg, R max , maximum duration, etc.) related to repetitive transmission of the above wake up signal may be indicated in the following manner.
  • a value related to repetitive transmission of the wake up signal may be indicated through a system information block (SIB) as one value for each NB-IoT carrier.
  • SIB system information block
  • the list in which the one value is to be included may be generated differently according to the R max value set for the corresponding paging, or one list may be generated regardless of the R max value.
  • the maximum duration for the actual wake up signal may be indicated by one of the values belonging to the list.
  • the R max value set for paging is 1024
  • one list ⁇ 1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 7/8 ⁇ is generated.
  • 1/2 is set to a value indicating the maximum duration of the wake up signal through the SIB.
  • the maximum duration of the actual wake up signal may be 512 (1024 * 1/2).
  • the actual wake up signal may be transmitted at a smaller value (eg, actual duration) rather than always at the maximum value.
  • the aforementioned wake up signal may be configured to transmit additional information, in addition to indicating whether or not a specific search area is monitored. Examples described below are divided for convenience of description and may be applied in combination with each other.
  • cell identification information (eg, cell identifier) may be transmitted through a wake up signal.
  • a wake up signal For another example, information indicating whether to monitor for only one paging opportunity or multiple paging opportunities may be conveyed via a wake up signal.
  • one wake up signal is configured to manage four paging opportunities.
  • the wake up signal is a signal that wakes up one in four, a signal wakes up two out of four, a signal wakes up three out of four, and a signal wakes up all four. You need to include
  • the wake up signal is a signal for monitoring only the terminal group A and a signal for monitoring only the terminal group B.
  • the wake up signal is a signal for monitoring only the terminal group A and a signal for monitoring only the terminal group B.
  • embodiments of the present disclosure look at a specific method of designing a wake up signal that can be used to reduce power consumption of the terminal as described above.
  • a method of mapping a sequence of a wake up signal to a design and a resource region will be described in order to increase the reliability of detection of the wake up signal and to transfer additional information.
  • the wake up signal is described as being configured based on the NPSS. However, this is only for convenience of description and may be configured based on the NSSS.
  • the embodiments described below are not limited to the Zadoff-Chu sequence, and of course, the same or similar may be applied to other sequences supported by the wireless communication system.
  • the method may be applied not only to the wake up signal, but also to other signals having the same or similar functions.
  • the embodiments described below are described based on the existing LTE system, but may be applied to the same or similarly to the NR (New RAT) system.
  • the sequence generation and resource mapping method described herein is described based on a transmission unit (eg, a subframe) in an LTE system, but a transmission unit (eg, a short transmission unit, a subframe) in an NR system. , Slots, etc.) may be equally or similarly applied.
  • monitoring the search space in the present specification means that the corresponding CRC is pre-decoded after decoding the N-PDCCH of a specific area according to a DCI format (DCI format) to be received through the search area. It may also refer to a process of checking whether or not it matches (ie, matches) a desired value by scrambling to a specific RNTI value promised.
  • DCI format DCI format
  • each terminal recognizes a single PRB as a single carrier, and thus, a PRB referred to herein may be interpreted to have the same meaning as a carrier.
  • DCI format N0, DCI format N1, and DCI format N2 referred to herein may refer to DCI format N0, DCI format N1, and DCI format N2 described above (eg, defined in the 3GPP standard).
  • anchor-type PRBs are N-PSS, N- for initial access from a base station perspective. It may also mean a PRB transmitting an N-PDSCH for an SSS, an N-PBCH, and / or a system information block (N-SIB). In this case, there may be one anchor-type PRB, or there may be multiple anchor-type PRBs.
  • the specific anchor-type PRB selected by the terminal through initial connection may be an anchor PRB or an anchor carrier. May be referred to.
  • a PRB allocated from a base station to perform a downlink process (or procedure) after initial access may be referred to as an additional PRB (or additional carrier).
  • the sequence of the wake up signal (or go-to sleep signal) as described above may be configured based on a Zadoff-Chu sequence (ZC sequence).
  • ZC sequence Zadoff-Chu sequence
  • the above-described wake up signal may be transmitted using 11 ZC sequences of length L. That is, to transmit a wake up signal in a resource region (eg, 11 (OFDM) symbols) except the control channel region, 11 ZC sequences of length L may be used.
  • 11 ZC sequences of length L may be used.
  • the L value can be 11 or 13, a prime number around 12. This is because, if the length of the ZC sequence is set to a small number, as many root indices as possible can be used to generate the sequence.
  • the last RE When L is 11, the last RE may be set to repeat the value of the previous RE through a cyclic shift. Alternatively, if L is 13, the last RE may be set to drop.
  • a null value may be input to the last RE, such as NPSS, and a carrier on the opposite end that does not overlap with a null carrier used by NPSS may be set as a null carrier.
  • 11 ZC sequences may be set to be transmitted one per symbol (eg, OFDM symbol).
  • root indexes of different N ZC sequences may be used.
  • the selected root index (es) may be repeatedly applied to the remaining 11-N symbols according to a preset rule.
  • N may be one of 1 to 11.
  • each root index included in 11 symbols may be '4, 7, 4, 7, 4, 7, 4, 7, 4, 7, 4'.
  • the other root index may be set to be 11-a.
  • a method of improving correlation performance by using a cover code (or fixed cover code) for the 11 OFDM symbols may be considered.
  • a cover code or fixed cover code
  • [1, 1, -1, 1, -1, 1, -1, 1, 1] or [1, 1, -1, 1, -1, -1, 1, -1, 1] and the like can be used.
  • the cover code used for the wake up signal needs to be set to show a low false alarm in terms of cross-correlation with the cover code used in NPSS. This is because the wake up signal may be involved in performance degradation associated with the terminal searching for the NPSS.
  • the false alarm may mean an error of mistaken the wake up signal and the NPSS due to the cover code.
  • the above-described wake up signal may be set to indicate only an operation of waking or sleeping the terminal by transmitting only one bit of information, but in consideration of inter cell interference, etc., two or more bits of information wake up. There may be a case where it should be transmitted via the up signal. In this case, additional information may be transmitted through the corresponding signal.
  • the additional information may be set through a root index value of the sequence constituting the wake up signal, the number of root indexes, a repetition pattern of the root index, and the like.
  • two or more bits of information may be transferred in consideration of a factor for distinguishing a case where one root index is selected and repeatedly transmitted and a case where two root indexes are selected and repeated.
  • a method of classifying information according to an arrangement order for example, corresponding information or mapped pattern
  • a method of classifying information using different cover codes may be considered.
  • the wake up signal since the aforementioned wake up signal needs to cover the cell edge of the corresponding cell, the wake up signal may be set to be repeatedly transmitted.
  • a signal included in the aforementioned 11 symbols may be considered as a basic unit, that is, a single repetition.
  • the terminal may expect that the wake up signal is repeatedly transmitted according to a repetition level delivered through higher layer, that is, higher layer signaling (eg, RRC signaling).
  • the information on the repetition level may be expressed as an R max value (eg, 2, 4, 8, to 2048).
  • small repetition levels may be determined for terminal (s) that may be located near the cell center, and large repetition levels may be determined for terminal (s) that may be located at cell boundaries.
  • the greater the repetition level the greater the probability of affecting inter-cell interference, and in consideration of this, the amount of information transmitted according to the repetition level may be set differently.
  • the wake up signal (or go-to sleep signal) for the terminal located at the cell boundary may be set to be transmitted through a large number of repetitions.
  • a wake up signal may be transmitted from a neighbor cell (ie, a base station of a neighbor cell, etc.), and the configuration of the wake up signal transmitted from the serving cell of the terminal and the wake up signal transmitted from the neighbor cell may be the same. In this case, it may be difficult for a terminal located at a cell boundary to distinguish which cell the received wake up signal is.
  • different wake up signals may mean signals having the same signal design scheme but different information.
  • the wake up signal information that can distinguish a cell needs to be included in the wake up signal. That is, additional information needs to be transmitted through the wake up signal, and the amount of information transmitted according to the repetition level may be set differently. For example, the greater the repetition level, the greater the amount of information to be delivered.
  • the above-described method may be applied not only to a large coverage cell (eg, a large cell) but also to a narrow coverage cell (eg, a small cell) or a plurality of complex cells.
  • the above-described method may be used not only for distinguishing between adjacent cells but also for distinguishing terminals (or terminal groups) in the same cell.
  • a method of setting a different number of scrambling sequences (for example, R max / 8) for each repetition level (for example, R max ) may be considered.
  • the number of scrambling sequences may be set to be based on a repetition level value (eg, an R max value). That is, the number of scrambling sequences may be given according to a preset specific rule or specific formula.
  • a binary scrambling sequence eg, M-sequence
  • a ZC sequence e.g., ZC sequence
  • a Hadamard sequence e.g., a Hadamard sequence
  • DFT Discrete Fourier Transform
  • the repetition level when the repetition level is set to 128, 16 different scrambling sequences may be set to be distinguished based on each cell identifier.
  • the repetition level is set to eight or less (eg, four or two), the same scrambling sequence may be applied to set the wake up signal to be transmitted.
  • the wake up signal may be transmitted by applying an orthogonal cover code of a specific length (eg, R max ) for each repetition level.
  • the available cover code may be used Hadamard sequence, DFT sequence and the like.
  • the Hadamard sequence of length 128 may be configured to be transmitted over 128 subframes by applying one value for each subframe (or slot).
  • 128 pieces of information can be delivered at the corresponding repetition level.
  • 16 pieces of information may be expressed by presetting 16 of the 128 Hadamard sequences.
  • the root index (or root index combination) does not change for a certain subframe length (i.e. a specific number of iterations), and a value different from the previously used root index for the next specific subframe length.
  • a method of setting to transmit may be considered. Different information may be transmitted through a method of changing and using a root index for each specific subframe length.
  • the root index may be transmitted unchanged for four subframes (ie, 4 ms), and another root index may be selected for the next four subframes to transmit a sequence. Also, different root indices may be used for every subframe.
  • UEs may be grouped according to coverage enhancement (CE) levels.
  • CE coverage enhancement
  • the wake up signal of a section overlapping a valid subframe may be punctured in a narrowband reference signal (NRS) RE.
  • NSS narrowband reference signal
  • the method described in this embodiment has been described with reference to the case where the number of symbols (ie, OFDM symbols) is 11, the method may be similarly or similarly applied to a wake up signal operating in N symbols.
  • the length of the sequence may be 12 * N.
  • a gold sequence (based on PN sequence) that can fit (ie, map) into N (or N symbol ) symbols may be used for the wake up signal.
  • N 11
  • a gold sequence having a length of 132 the length of N * 12 subcarriers
  • N max the same gold sequence may be transmitted in N max subframes under the assumption that the sequence is not reinitialized.
  • a method of generating and mapping a gold sequence of 132 * M length (M> 1) to M subframes may be used.
  • M the number of subframes in the NB-IoT system.
  • N max may be set based on a single subframe.
  • N max when the number of repetitions is N max , one sequence transmitted over M subframes may be repeated N max times and transmitted.
  • N max may be set based on M subframes.
  • the initial state of a particular m sequence (eg, the second m sequence) of the two m sequences used in the above-described gold sequence may be set to follow the C init value.
  • the C init value may be a cell identifier (N ⁇ Ncell_ID), a frame number (n f ), a slot number (n s ), a wake up signal or a period of paging opportunity (N), a terminal group identifier (N GID ), or the like. It can consist of a linear or non-linear combination of parameters.
  • the nonlinear combination may be expressed as a product of the aforementioned parameters or the square of the parameters.
  • a modulo function or a minimum function may be used for the entire result value or some parameters in order to avoid the problem of overflowing the 31 bit shift register.
  • LSB least significant bit
  • c init can be given by equations (5) and (6).
  • N GID may be omitted in Equations 5 and 6 below.
  • a c init value may be set to a common value in one cell.
  • an uplink DMRS (Demodulation Reference Signal) based sequence that can fit (ie, map) into N (or N symbol ) symbols may be used for the wake up signal.
  • DMRS Demodulation Reference Signal
  • N may be set to 11.
  • an uplink DMRS sequence for an uplink DMRS sequence (when the number of subcarriers per resource unit (RU) is greater than 1) in an NB-IoT system may be given by Equation 7.
  • Equation 7 Is specified according to the number of subcarriers per RU, May mean a cyclic shift value. If the number of subcarriers per RU is 12, Is determined by Table 16, and the u value may be determined as shown in Equation 8.
  • methods of selecting uplink DMRS to be transmitted in 11 consecutive symbols may be the same as Method 1 to Method 4 described below.
  • the following method is described by exemplifying the case where the number of subcarriers per RU is 12.
  • a method of selecting 11 uplink DMRS sequences to be mapped to each symbol according to a predetermined method may be considered.
  • the initialization for the pre-promised method includes a cell identifier (N ⁇ Ncell_ID), a frame number (n f ), a slot number (n s ), a wake up signal or a period of paging opportunity (N), and a terminal group. And a combination (eg, a non-linear combination) of an identifier (N GID ), and a symbol index.
  • the previously promised method may include a cell identifier (N ⁇ Ncell_ID), a frame number (n f ), a slot number (n s ), a wake up signal or a period of paging opportunity (N), and a terminal group identifier (N GID ).
  • symbol index may be used.
  • N uplink DMRS sequence sets having a good cross-correlation property are set to N, and one of A method of selecting and applying a set may be considered.
  • a predetermined method may be used to select one uplink DMRS sequence set having one of N symbols.
  • N may be set to at least 504, considering the case of distinguishing only the cell identifier.
  • the initialization for the method promised in advance may include a cell identifier (N ⁇ Ncell_ID), a frame number (n f ), a slot number (n s ), a wake up signal or a period of paging opportunity (N), and a terminal group identifier ( N GID ), and a combination of symbol indexes (eg, non-linear combinations).
  • the previously promised method may include a cell identifier (N ⁇ Ncell_ID), a frame number (n f ), a slot number (n s ), a wake up signal or a period of paging opportunity (N), and a terminal group identifier (N GID ).
  • symbol index may be used.
  • L may be at least 352 (32 * 11) or more.
  • 32 is the smallest 2 ⁇ n value greater than 30, and 11 is a value considering 11 symbols.
  • the initialization for the pre-promised method includes a cell identifier (N ⁇ Ncell_ID), a frame number (n f ), a slot number (n s ), a wake up signal or a period of paging opportunity (N), and a terminal group identifier. (N GID ), and a combination of symbol indexes (eg, non-linear combinations).
  • the previously promised method may include a cell identifier (N ⁇ Ncell_ID), a frame number (n f ), a slot number (n s ), a wake up signal or a period of paging opportunity (N), and a terminal group identifier (N GID ).
  • symbol index may be used.
  • the sequence for the wake up signal may be set through the method of FIG. 10.
  • 10 shows an example of a method of setting a sequence of wake up signals to which the method proposed in the present specification can be applied. 10 is merely for convenience of description and does not limit the scope of the invention.
  • a wake up signal is transmitted using a random sequence of length L as in the method 3 described above.
  • the sequence mapped to 11 symbols may be determined by a binary value for elements of a random sequence of length L.
  • the 5-bit value for the first symbol (1 st OFDM symbol) becomes '01011' and becomes 11.
  • the 5-bit value for the 2 nd OFDM symbol is '10110', which is 22.
  • the 5-bit value for the third symbol (3 rd OFDM symbol) becomes '11111' and becomes 31.
  • a method of selecting an uplink DMRS sequence to be mapped to the first symbol according to a predetermined method may be considered.
  • the ten uplink DMRS sequences to be mapped from the second symbol to the eleventh symbol include a cyclic shift ⁇ and / or a value for the initially selected uplink DMRS sequence value. Can be created by changing the value.
  • the cyclic shift ⁇ and / or The value may be set to increase at predetermined intervals (ie, certain equal intervals) or randomly selected intervals as the symbol index increases.
  • the initialization for the pre-promised method and / or the randomly selected interval may include a cell identifier (N ⁇ Ncell_ID), a frame number (n f ), a slot number (n s ), a wake up signal or a period of paging opportunity. (N), a terminal group identifier (N GID ), and a symbol index or the like combination (eg, non-linear combination).
  • the predetermined method and / or the randomly selected interval may include a cell identifier N ⁇ Ncell_ID, a frame number n f , a slot number n s , a wake up signal or a period of paging opportunity N, It may be determined using a terminal group identifier (N GID ), a symbol index, and the like.
  • cyclic shift ( ⁇ ) and The values all combine a cell identifier (N ⁇ Ncell_ID), a frame number (n f ), a slot number (n s ), a wake up signal or a period of paging opportunity (N), a terminal group identifier (N GID ), and a symbol index. May be considered.
  • the resource region allocated to the wake up signal may be divided into a TDM scheme and / or an FDM scheme.
  • the resource region allocated to the wake up signal is 1 resource block (RB).
  • RB resource block
  • one RB may be divided into a TDM scheme and / or an FDM scheme, it will be described on the assumption that one RB is divided using the FDM scheme for convenience of description.
  • 11 shows an example of a sequence configuration and mapping scheme of a wake up signal to which the method proposed in the present specification can be applied. 11 is merely for convenience of description and does not limit the scope of the present invention.
  • the resource region 1102 means a control channel region (eg, a PDCCH region)
  • the resource region 1104 means a first wake up signal region (eg, a first resource region)
  • the resource region 1106 is a second wake up. It may mean a signal area (eg, a second resource area).
  • the length of the generated sequence may be about twice the length of each resource region (that is, the number of symbols constituting each resource region) shown in FIG. 11.
  • the sequence can be set to map by drilling the back (or front) of each sequence.
  • a method of generating two sequences set in consideration of the length of each resource region and transmitting a wake up signal may be considered.
  • a decimal X value smaller than 66 (6 * 11) may be set, and an X length ZC sequence may be generated and used.
  • the related scrambling sequence may also be set to be generated according to the X length.
  • the X value may be 61, and for the remaining five REs, a value mapped from the first RE to the fifth RE may be additionally used.
  • the wake up signal not only indicates whether to monitor the above-described CSS (ie, the search area for the NPDCCH), but also additional information may be transmitted according to a combination of indexes used to generate two sequences.
  • the additional information may correspond to the cell identification information described above, information indicating a paging opportunity to perform monitoring, information on the terminal group, and the like.
  • the additional information may be delivered using a combination of a root index used to generate a ZC sequence mapped to the resource region 1104 and a root index used to generate a ZC sequence mapped to the resource region 1106.
  • the ZC sequence mapped to the resource region 1104 is referred to as a first sequence
  • the ZC sequence mapped to the resource region 1106 is referred to as a second sequence
  • each root index is a first first root index and a second root index. May be referred to.
  • the terminal that receives the wake up signal receives an indication of the root index pair (4, 5). It can be judged that. At this time, if the root index pair (4, 5) indicates the monitoring performance of two of the four paging opportunities, the terminal can perform monitoring only for the two paging opportunities of the four paging opportunities. .
  • mapping relationship between root index pairs and the additional information needs to be set in advance on higher layer signaling, physical layer signaling, or system.
  • the method described in the present embodiment may be applied in combination with the method for delivering additional information based on the repetition level described in the above-described first embodiment. That is, when a sequence is mapped to a resource region (ie, 1 RB) according to the method described in this embodiment, additional information may be set to be transmitted according to the degree of repeating transmission using this as a basic unit.
  • the resource region allocated to the wake up signal may be divided into a TDM scheme and / or an FDM scheme.
  • the resource region allocated to the wake up signal is 1 RB. This is only a resource region considering the NB-IoT system in the LTE system, and the method described in this embodiment may be equally or similarly applied to the resource region considering the NB-IoT system in the NR system.
  • one RB may be divided into a TDM scheme and / or an FDM scheme, it will be described on the assumption that one RB is divided using the FDM scheme for convenience of description.
  • a ZC sequence of length 6 may be generated into two sets of 11 pieces each so that each set is mapped to each resource region.
  • the available length 6 ZC sequence may be a length 6 computer generated ZC sequence used for uplink DMRS of the NB-IoT system.
  • the available length 6 ZC sequence may correspond to a sequence set to use only 6 REs through puncturing after generating a ZC sequence larger than 6.
  • 11 ZC sequences may be generated using 1 to 11 different root indices.
  • a method of generating five and six ZC sequences using two root index pairs may be considered. That is, six ZC sequences (first sequence) of length 11 generated using the first root index pair are mapped to the resource region, and ZC sequences (second sequence) of length 11 generated using the second root index pair are mapped. Five may be mapped to resource zones.
  • 12 shows another example of a sequence configuration and mapping scheme of a wake up signal to which the method proposed in the present specification can be applied. 12 is merely for convenience of description and does not limit the scope of the invention.
  • a wake up signal is transmitted using a Zadoff-Chu sequence and is transmitted through two divided resource regions.
  • the resource region 1202 means a control channel region (eg, a PDCCH region)
  • the resource regions 1204 and 1206 mean a resource region for the first root index pair
  • the resource regions 1208 and 1210 represent a second root. It may mean a resource region for an index pair.
  • an X sequence of length 12 may be generated by the first root index pair (a, b), and a Y sequence of length 12 may be generated by the second root index pair (c, d).
  • the X sequence may be generated based on an A sequence of length 6 generated by the root index a and a B sequence of length 6 generated by the root index b.
  • the Y sequence may be generated based on the C sequence of length 6 generated by the root index c and the D sequence of length 6 generated by the root index d.
  • ZC sequences of length 11 may be mapped to 11 symbols in the order of [X, Y, X, Y, X, Y, X, Y, X, Y, X].
  • the root index pair may also consist of root indices of two sequences arranged consecutively on the time axis.
  • the root index of the sequence mapped to the resource region 1204 and the root index of the sequence mapped to the resource region 1208 may be set as a first root index pair, and the root index and the resource region of the sequence mapped to the resource region 1206 may be set.
  • the root index of the sequence mapped to 1210 may be set as a second root index pair.
  • the wake up signal not only indicates whether to monitor the above-described CSS (ie, the search region for the NPDCCH), but additional information may be transmitted according to two root index pairs.
  • two root index pairs may be selected based on a cell identifier, an index of a time unit (eg, a subframe index), and the like.
  • a combination of two root index pairs may be selected at random or a preset rule according to information to be additionally delivered through a wake up signal.
  • each ZC sequence generated based on the root index pair may be configured to be repeatedly mapped or alternately mapped.
  • a cover code may be additionally used to improve performance.
  • the method described in the present embodiment may be applied in combination with the method for delivering additional information based on the repetition level described in the above-described first embodiment. That is, when a sequence is mapped to a resource region (ie, 1 RB) according to the method described in this embodiment, additional information may be set to be transmitted according to the degree of repeating transmission using this as a basic unit.
  • FIG. 13 is a flowchart illustrating an operation of a terminal receiving a specific signal in a wireless communication system to which the method proposed in this specification can be applied. 13 is merely for convenience of description and does not limit the scope of the present invention.
  • the terminal is set to perform the method proposed in the above-described embodiments of the present specification (for example, the first embodiment and the fourth embodiment).
  • the specific signal in FIG. 13 may mean the above-described wake up signal (or go-to sleep signal). That is, the specific signal may indicate whether to monitor the search area (CSS) of the control channel (eg, NPDCCH).
  • SCS search area
  • the terminal may attempt to detect a specific signal in a preset resource region (S1305).
  • the preset resource region may be allocated (or set) through the above-described method.
  • the search region may include a time unit (eg, subframe, slot, etc.) for a paging opportunity, and the preset resource region may be allocated to a time unit disposed before the search region.
  • the preset resource region may be allocated periodically according to a period of paging opportunity (ie, paging period).
  • the preset resource region may include a first resource region and a second resource region.
  • the first resource region and the second resource region may be set according to the above-described methods (eg, the method in the fourth embodiment or the fifth embodiment).
  • the terminal may monitor the search area (S1310).
  • a sequence for a specific signal may be set and mapped through the above-described method (eg, the method in the fourth embodiment).
  • a Zadoff-Chu sequence for a particular signal may be generated using a first sequence based on the first root index and a second sequence based on the second root index.
  • each of the first sequence and the second sequence may be mapped to the first resource region and the second resource region.
  • the root index pair composed of the first root index and the second root index may be set to deliver additional information as described above.
  • the root index pair may indicate an identifier of a cell transmitting a specific signal, the number of paging opportunities to monitor, the number of terminal groups to monitor, and the like.
  • the length of an orthogonal cover code applied to the specific signal may be determined based on the number of repetitive transmissions.
  • configuration information eg, information indicating a maximum duration
  • SIB SIB for each carrier on which a specific signal is transmitted.
  • FIG. 14 illustrates a block diagram of a wireless communication device to which the methods proposed herein can be applied.
  • a wireless communication system includes a base station 1410 and a plurality of terminals 1420 located in an area of a base station 1410.
  • the base station 1410 includes a processor 1411, a memory 1412, and an RF unit 1413.
  • the processor 1411 implements the functions, processes, and / or methods proposed in FIGS. 1 to 13. Layers of the air interface protocol may be implemented by the processor 1411.
  • the memory 1412 is connected to the processor 1411 and stores various information for driving the processor 1411.
  • the RF unit 1413 is connected to the processor 1411 and transmits and / or receives a radio signal.
  • the terminal 1420 includes a processor 1421, a memory 1422, and an RF unit 1423.
  • the processor 1421 implements the functions, processes, and / or methods proposed in FIGS. 1 to 13. Layers of the air interface protocol may be implemented by the processor 1421.
  • the memory 1422 is connected to the processor 1421 and stores various information for driving the processor 1421.
  • the RF unit 1423 is connected to the processor 1421 and transmits and / or receives a radio signal.
  • the memories 1412 and 1422 may be inside or outside the processors 1411 and 1421, and may be connected to the processors 1411 and 1421 through various well-known means.
  • the base station 1410 and / or the terminal 1420 may have a single antenna or multiple antennas.
  • 15 is a block diagram illustrating a communication device according to one embodiment of the present invention.
  • FIG. 15 illustrates the terminal of FIG. 14 in more detail.
  • a terminal may include a processor (or a digital signal processor (DSP) 1510, an RF module (or an RF unit) 1535, and a power management module 1505). ), Antenna 1540, battery 1555, display 1515, keypad 1520, memory 1530, SIM card Subscriber Identification Module card) 1525 (this configuration is optional), speaker 1545, and microphone 1550.
  • the terminal may also include a single antenna or multiple antennas. Can be.
  • the processor 1510 implements the functions, processes, and / or methods proposed in FIGS. 1 to 13.
  • the layer of the air interface protocol may be implemented by the processor 1510.
  • the memory 1530 is connected to the processor 1510 and stores information related to the operation of the processor 1510.
  • the memory 1530 may be inside or outside the processor 1510 and may be connected to the processor 1510 by various well-known means.
  • the processor 1510 receives the command information, processes the telephone number, and performs a proper function. Operational data may be extracted from the SIM card 1525 or the memory 1530. In addition, the processor 1510 may display command information or driving information on the display 1515 for the user to recognize and for convenience.
  • the RF module 1535 is connected to the processor 1510 to transmit and / or receive an RF signal.
  • the processor 1510 transmits command information to the RF module 1535 to transmit a radio signal constituting voice communication data, for example, to initiate communication.
  • the RF module 1535 is composed of a receiver and a transmitter for receiving and transmitting a radio signal.
  • the antenna 1540 functions to transmit and receive wireless signals. Upon receiving the wireless signal, the RF module 1535 may forward the signal and convert the signal to baseband for processing by the processor 1510. The processed signal may be converted into audible or readable information output through the speaker 1545.
  • Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
  • an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), and FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above.
  • the software code may be stored in memory and driven by the processor.
  • the memory may be located inside or outside the processor, and may exchange data with the processor by various known means.
  • a method for transmitting and receiving a signal has been described with reference to an example applied to a 3GPP LTE / LTE-A system.
  • a NR (New RAT) system is provided. It is possible to apply to various wireless communication systems such as.

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Abstract

L'invention concerne un procédé de transmission et de réception de données dans un système de communication sans fil prenant en charge l'internet des objets à bande étroite (NB-IdO), et un dispositif associé. Plus particulièrement, l'invention concerne un procédé dans lequel un terminal reçoit un signal spécifique, pouvant comprendre les étapes consistant : à tenter de détecter le signal spécifique dans une région de ressource prédéfinie, la détection du signal spécifique indiquant l'opportunité de surveiller une région de recherche d'un canal de commande ; et à surveiller la région de recherche lorsque le signal spécifique est détecté. La région de ressource prédéfinie comprend une première région de ressource et une seconde région de ressource. Une séquence destinée au signal spécifique peut être produite à l'aide d'une première séquence fonction d'un indice d'itinéraire et d'une seconde séquence fonction d'un indice d'itinéraire. La première séquence et la seconde séquence peuvent être mises en correspondance respectivement avec la première région de ressource et la seconde région de ressource.
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CN111757432B (zh) * 2019-03-29 2024-04-26 华为技术有限公司 一种唤醒方法以及相关装置
CN113366890B (zh) * 2019-03-29 2022-09-23 华为技术有限公司 一种唤醒信号发送方法及装置
CN113366890A (zh) * 2019-03-29 2021-09-07 华为技术有限公司 一种唤醒信号发送方法及装置
CN111757432A (zh) * 2019-03-29 2020-10-09 华为技术有限公司 一种唤醒方法以及相关装置
WO2020199032A1 (fr) * 2019-03-29 2020-10-08 华为技术有限公司 Procédé et dispositif de communication
WO2020199813A1 (fr) * 2019-03-29 2020-10-08 电信科学技术研究院有限公司 Procédé d'émission de signal d'économie d'énergie, dispositif côté réseau, et terminal
CN111867015B (zh) * 2019-04-30 2023-11-17 华为技术有限公司 检测或发送下行控制信道的方法和装置
CN111867015A (zh) * 2019-04-30 2020-10-30 华为技术有限公司 检测或发送下行控制信道的方法和装置
CN114073111A (zh) * 2019-07-05 2022-02-18 株式会社Ntt都科摩 终端、基站和通信方法
CN114271004A (zh) * 2019-08-16 2022-04-01 华为技术有限公司 通信方法和装置
CN114271004B (zh) * 2019-08-16 2024-06-11 华为技术有限公司 通信方法和装置
CN113676990B (zh) * 2020-05-15 2023-01-13 维沃移动通信有限公司 信息检测、发送方法、终端及网络侧设备
CN113676990A (zh) * 2020-05-15 2021-11-19 维沃移动通信有限公司 信息检测、发送方法、终端及网络侧设备

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