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WO2016013779A1 - Procédé de réception d'informations de programmation de cellule de spectre sans licence, et dispositif associé - Google Patents

Procédé de réception d'informations de programmation de cellule de spectre sans licence, et dispositif associé Download PDF

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Publication number
WO2016013779A1
WO2016013779A1 PCT/KR2015/006637 KR2015006637W WO2016013779A1 WO 2016013779 A1 WO2016013779 A1 WO 2016013779A1 KR 2015006637 W KR2015006637 W KR 2015006637W WO 2016013779 A1 WO2016013779 A1 WO 2016013779A1
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WIPO (PCT)
Prior art keywords
unlicensed band
cell
band cell
indication field
value indicating
Prior art date
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PCT/KR2015/006637
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English (en)
Korean (ko)
Inventor
박규진
최우진
Original Assignee
주식회사 케이티
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Priority claimed from KR1020150080933A external-priority patent/KR20160013505A/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Publication of WO2016013779A1 publication Critical patent/WO2016013779A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10—Dynamic resource partitioning

Definitions

  • the present invention relates to a method and apparatus for supporting a radio access technology (RAT) based on LTE or LTE-Advanced in an unlicensed spectrum. More particularly, the present invention relates to a method and apparatus for scheduling a cell using an unlicensed band.
  • RAT radio access technology
  • LTE Long Term Evolution
  • LTE-Advanced of the current 3GPP series are high-speed, high-capacity communication systems that can transmit and receive various data such as video and wireless data, out of voice-oriented services.
  • the development of technology capable of transferring large amounts of data is required.
  • a technique for allowing carrier aggregation to be applied in various deployment scenarios has been discussed.
  • the carrier merging technology is a technology for improving data transmission / reception rate by merging one or more component carriers to transmit and receive data, and thus, an available frequency is increased for the terminal, thereby processing a large amount of data at high speed.
  • each frequency band is used by different wireless communication systems according to the policy, there is a problem that the compatibility is poor.
  • the present invention for solving the above problems is to propose a method and apparatus for performing scheduling of an unlicensed band cell using a licensed band cell.
  • the present invention is to propose a method and apparatus for applying cross-carrier scheduling of a specific unlicensed band cell.
  • the terminal configures carrier aggregation or dual connectivity including a licensed band cell and an unlicensed band cell. And setting a value indicating whether there is a carrier indication field of a licensed band cell and receiving scheduling information of the unlicensed band cell in the licensed band cell, wherein the unlicensed band cell is shared by one or more communication systems. It provides a method that is a cell using the frequency of the unlicensed band.
  • the present invention provides a method for transmitting a scheduling information of an unlicensed band cell by a base station, comprising: configuring a carrier aggregation or dual connectivity including a licensed band cell and an unlicensed band cell in a terminal; And transmitting scheduling information of an unlicensed band cell in a licensed band cell, wherein the terminal sets a value indicating whether a carrier indication field exists in the licensed band cell, and the unlicensed band cell is an unlicensed band shared by one or more communication systems. It provides a method that is a cell using a frequency of.
  • the present invention also provides a carrier aggregation or dual connectivity including a licensed band cell and an unlicensed band cell in a terminal that receives scheduling information of an unlicensed band cell, and configures a carrier of a licensed band cell.
  • a control unit for setting a value indicating whether the indication field is present, and a receiving unit for receiving scheduling information of an unlicensed band cell in a licensed band cell, wherein the unlicensed band cell is a cell using a frequency of the unlicensed band shared by one or more communication systems. Provides a terminal device.
  • the present invention provides a base station for transmitting scheduling information of an unlicensed band cell, a control unit and a licensed band for configuring a carrier aggregation or dual connectivity including a licensed band cell and an unlicensed band cell to the terminal
  • the cell includes a transmitter for transmitting scheduling information of an unlicensed band cell, wherein a terminal sets a value indicating whether a carrier indication field exists in a licensed band cell, and an unlicensed band cell has a frequency of an unlicensed band shared by one or more communication systems.
  • a base station apparatus which is a cell using.
  • the present invention described above has an effect of providing a specific method and apparatus for monitoring scheduling information of an unlicensed band cell for a terminal configuring carrier aggregation or dual connectivity using an unlicensed band cell.
  • the present invention has the effect of providing a specific operation method and apparatus when the unlicensed band cell configures carrier aggregation or dual connectivity.
  • FIG. 1 is a diagram exemplarily illustrating an OFDM symbol for transmitting a control signal in one subframe.
  • FIG. 2 is a diagram illustrating self carrier scheduling and cross carrier scheduling on multiple carriers.
  • 3 is an exemplary diagram for describing each information element of cross-carrier scheduling configuration information.
  • 4 is a diagram for explaining a downlink control information format.
  • FIG. 5 is a diagram for describing an operation of a terminal performing communication using a licensed band and an unlicensed band.
  • 6 is an exemplary diagram for describing an available interval in an unlicensed band cell.
  • FIG. 7 is a view for explaining the operation of the terminal according to an embodiment of the present invention.
  • FIG. 8 is a view for explaining the operation of the terminal according to the first embodiment of the present invention.
  • FIG. 9 is a view for explaining the operation of the terminal according to the second embodiment of the present invention.
  • FIG. 10 is a view for explaining the operation of the terminal according to the third embodiment of the present invention.
  • FIG. 11 is a diagram for explaining an operation of a base station according to another embodiment of the present invention.
  • FIG. 12 is a view for explaining a terminal configuration according to another embodiment of the present invention.
  • FIG. 13 is a view for explaining the configuration of a base station according to another embodiment of the present invention.
  • the wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data, and the like.
  • the wireless communication system includes a user equipment (UE) and a base station (base station, BS, or eNB).
  • a user terminal is a generic concept meaning a terminal in wireless communication.
  • user equipment (UE) in WCDMA, LTE, and HSPA, as well as mobile station (MS) in GSM, user terminal (UT), and SS It should be interpreted as a concept that includes a subscriber station, a wireless device, and the like.
  • a base station or a cell generally refers to a station that communicates with a user terminal, and includes a Node-B, an evolved Node-B, an Sector, a Site, and a BTS.
  • Other terms such as a base transceiver system, an access point, a relay node, a remote radio head (RRH), a radio unit (RU), and a small cell may be called.
  • RRH remote radio head
  • RU radio unit
  • a base station or a cell is a generic meaning indicating some areas or functions covered by a base station controller (BSC) in CDMA, a Node-B in WCDMA, an eNB or a sector (site) in LTE, and the like. It should be interpreted as, and it is meant to cover all the various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, RRH, RU, small cell communication range.
  • BSC base station controller
  • the base station may be interpreted in two senses. i) the device providing the megacell, the macrocell, the microcell, the picocell, the femtocell, the small cell in relation to the wireless area, or ii) the wireless area itself. In i) all devices which provide a given wireless area are controlled by the same entity or interact with each other to cooperatively configure the wireless area to direct the base station.
  • the base station may indicate the radio area itself to receive or transmit a signal from a viewpoint of a user terminal or a neighboring base station.
  • megacells macrocells, microcells, picocells, femtocells, small cells, RRHs, antennas, RUs, low power nodes (LPNs), points, eNBs, transmit / receive points, transmit points, and receive points are collectively referred to as base stations. do.
  • the user terminal and the base station are two transmitting and receiving entities used to implement the technology or technical idea described in this specification in a comprehensive sense and are not limited by the terms or words specifically referred to.
  • the user terminal and the base station are two types of uplink or downlink transmitting / receiving subjects used to implement the technology or the technical idea described in the present invention, and are used in a generic sense and are not limited by the terms or words specifically referred to.
  • the uplink (Uplink, UL, or uplink) refers to a method for transmitting and receiving data to the base station by the user terminal
  • the downlink (Downlink, DL, or downlink) means to transmit and receive data to the user terminal by the base station It means the way.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDM-FDMA OFDM-TDMA
  • OFDM-CDMA OFDM-CDMA
  • One embodiment of the present invention can be applied to resource allocation in the fields of asynchronous wireless communication evolving to LTE and LTE-Advanced through GSM, WCDMA, HSPA, and synchronous wireless communication evolving to CDMA, CDMA-2000 and UMB.
  • the present invention should not be construed as being limited or limited to a specific wireless communication field, but should be construed as including all technical fields to which the spirit of the present invention can be applied.
  • the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.
  • TDD time division duplex
  • FDD frequency division duplex
  • a standard is configured by configuring uplink and downlink based on one carrier or a pair of carriers.
  • the uplink and the downlink include a Physical Downlink Control CHannel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), a Physical Uplink Control CHannel (PUCCH), an Enhanced Physical Downlink Control CHannel (EPDCCH), and the like.
  • Control information is transmitted through the same control channel, and data is configured by a data channel such as a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH).
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • control information may also be transmitted using an enhanced PDCCH (EPDCCH or extended PDCCH).
  • EPDCCH enhanced PDCCH
  • extended PDCCH extended PDCCH
  • a cell means a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.
  • a wireless communication system to which embodiments are applied may be a coordinated multi-point transmission / reception system (CoMP system) or a coordinated multi-antenna transmission scheme in which two or more transmission / reception points cooperate to transmit a signal.
  • antenna transmission system a cooperative multi-cell communication system.
  • the CoMP system may include at least two multiple transmission / reception points and terminals.
  • the multiple transmit / receive point is at least one having a base station or a macro cell (hereinafter referred to as an eNB) and a high transmission power or a low transmission power in a macro cell region, which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • an eNB a base station or a macro cell
  • a high transmission power or a low transmission power in a macro cell region which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • downlink refers to a communication or communication path from a multiple transmission / reception point to a terminal
  • uplink refers to a communication or communication path from a terminal to multiple transmission / reception points.
  • a transmitter may be part of multiple transmission / reception points, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.
  • a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH may be expressed in the form of 'sending and receiving a PUCCH, PUSCH, PDCCH, EPDCCH, and PDSCH'.
  • a description of transmitting or receiving a PDCCH or transmitting or receiving a signal through the PDCCH may be used as a meaning including transmitting or receiving an EPDCCH or transmitting or receiving a signal through the EPDCCH.
  • the physical downlink control channel described below may mean PDCCH or EPDCCH, and may also be used to include both PDCCH and EPDCCH.
  • the EPDCCH which is an embodiment of the present invention, may be applied to the portion described as the PDCCH, and the EPDCCH may be applied to the portion described as the EPDCCH as an embodiment of the present invention.
  • high layer signaling described below includes RRC signaling for transmitting RRC information including an RRC parameter.
  • the eNB performs downlink transmission to the terminals.
  • the eNB includes downlink control information and an uplink data channel (eg, a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and scheduling required to receive the PDSCH.
  • a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) may be transmitted.
  • PUSCH physical uplink shared channel
  • radio resources for uplink or downlink data transmission may be allocated to one UE through a plurality of carriers or serving cells. Therefore, it is possible to support an improved data transmission rate as compared with the existing communication method operating in a single carrier or serving cell.
  • CA carrier aggregation
  • CA capable terminal in case of a CA capable terminal belonging to the coverage of a base station supporting a CA, a primary cell connected through an initial RRC connection / configuration procedure with the base station
  • the Scell (Secondary cell) addition / release process may be performed through the RRC connection reconfiguration process.
  • the CA capable terminal may additionally combine up to five component carriers or serving cells through Scell activation / deactivation through MAC CE (Control Element) signaling.
  • MAC CE Control Element
  • FIG. 1 is a diagram exemplarily illustrating an OFDM symbol for transmitting a control signal in one subframe.
  • a control region includes transmission of a PHICH, a PCFICH, and a PDCCH.
  • the PDCCH is spread evenly allocated to the number of OFDM symbols to which the PDCCH indicated by the PCFICH is transmitted, except for the resources in which the PHICH and the PCFICH are used.
  • FIG. 2 is a diagram illustrating self carrier scheduling and cross carrier scheduling on multiple carriers.
  • 2A is a diagram illustrating self-carrier scheduling on multiple carriers and independently schedules a PDSCH on each carrier.
  • a PDCCH exists separately for each carrier, and the PDCCH of each carrier schedules the PDSCH of the corresponding carrier. That is, data is transmitted in each carrier by a control channel transmitted every subframe within a 1 ms subframe.
  • FIG. 2B illustrates a cross-carrier scheduling operation on multiple carriers and relates to a case in which PDSCHs for multiple carriers are configured on one carrier.
  • a PDCCH existing in one carrier may schedule a PDSCH that can be transmitted on multiple carriers.
  • data is transmitted in multiple carriers by a control channel transmitted every subframe within a 1ms subframe.
  • 3 is an exemplary diagram for describing each information element of cross-carrier scheduling configuration information.
  • a self-carrier scheduling method and a cross-carrier scheduling method are used for each serving cell scheduling method.
  • a cross-carrier scheduling method may be used.
  • whether to set the cross carrier scheduling for a certain CC or SCell is determined according to the configuration information of the 'PhysicalConfigDedicatedScell' field of the information element (IE) included in the RRC connection reconfiguration message. In particular, it is determined by whether the schedulingCellInfo-r10 field of the 'crossCarrierSchedulingConfig' IE is set to 'own' or 'other'.
  • IE information element
  • an information region configuring a 'crossCarrierSchedulingConfig' IE for cross carrier scheduling configuration may be configured. More specifically, when cross-carrier scheduling is set together with scheduling method setting information of a corresponding SCell when an arbitrary SCell is added through a CA, schedulingCellId in which PDCCH or EPDCCH including scheduling information for the corresponding SCell is transmitted is performed. Information can be set and transmitted. In addition, when cross-carrier scheduling is set, pdsch-Start-r10 information for indicating starting symbol setting information of the PDSCH may be set and transmitted together.
  • the case where the cross carrier scheduling is set may mean that schedulingCellInfo is set to other.
  • the cif-presence field value of the 'PhysicalConfigDedicated' IE may be set to True and transmitted to the UE.
  • the cif-Presence field of the CrossCarrierSchedulingConfig IE included in the 'PhysicalConfigDedicated' IE for the SCell may be set to True and transmitted to the terminal. have.
  • the UE decodes based on a DCI format including cif field information composed of 3 bits when monitoring a PDCCH or UE-specific Search Space (USS) of an EPDCCH of a scheduling cell. ).
  • a DCI format including cif field information composed of 3 bits when monitoring a PDCCH or UE-specific Search Space (USS) of an EPDCCH of a scheduling cell.
  • Table 1 describes each information field described with reference to FIG. 3.
  • the cif-Presence field is used to indicate whether or not the carrier indication field is present in the control channel (PDCCH or EPDCCH). That is, the value of the cif-presence field means a value indicating whether a carrier indication field exists.
  • the pdsch-Start field includes information for indicating starting symbol configuration information of the PDSCH.
  • the schedulingCellId field includes identification information of a scheduling cell in which PDCCH or EPDCCH including scheduling information about a scheduled SCell is transmitted.
  • 4 is a diagram for explaining a downlink control information format.
  • a downlink control information (DCI) format indicating scheduling grant for uplink or downlink transmission may be identified. According to each uplink or downlink transmission method and usage, DCI formats are separately transmitted.
  • a radio access technology (RAT) for efficiently using a limited frequency band is intended to provide high spectral efficiency through technologies such as MIMO, ICIC, and CoMP.
  • RAT radio access technology
  • CA carrier aggregation
  • an unlicensed band unlike a licensed band, a plurality of users, including individuals, are freely available to provide wireless communication service within the regulation of each country, not a wireless channel exclusively used by any operator. .
  • signal interference and coexistence with other communication systems may occur when providing an LTE / LTE-Advanced service through an unlicensed band.
  • LTE Long Term Evolution
  • various short range wireless communication protocols such as WiFi, Bluetooth, and NFC
  • problems may arise.
  • a co-existence problem may occur for each LTE operator. Therefore, there is a need for a method for solving this problem.
  • LBT wireless channel access
  • LBT wireless channel access
  • FIG. 5 is a diagram for describing an operation of a terminal performing communication using a licensed band and an unlicensed band.
  • a licensed-assisted access scheme LTE through carrier aggregation with a carrier or a cell configured through a licensed band Consider providing services.
  • the primary carrier supports a frame structure in the form of FDD or TDD through the licensed band, and in the case of a secondary carrier configured through the unlicensed band in the form of downlink only. Can be configured.
  • the secondary carrier configured through the unlicensed band may be in the form of supporting both uplink and downlink.
  • the primary carrier may process both uplink and downlink using a licensed band exclusively used by the corresponding mobile communication system.
  • the UE may process only downlink-only data using a frequency using an unlicensed band as a secondary carrier.
  • the terminal may process both uplink and downlink data through the secondary carrier.
  • an unlicensed band cell a cell configured through the unlicensed band of FIG. 5 will be referred to as an unlicensed band cell.
  • this is for convenience of description and has no limitation on its name, and may be used to include all cells of a mobile communication system using an unlicensed band frequency. That is, an unlicensed band cell refers to a cell using an unlicensed band frequency shared by one or more communication systems.
  • 6 is an exemplary diagram for describing an available interval in an unlicensed band cell.
  • an unlicensed band cell formed by an unlicensed band frequency by any one operator an unlicensed band cell formed by another operator in a corresponding frequency band or another radio access technology such as WiFi or Bluetooth (Radio) Access frequency (RAT) systems share the frequency band exclusively. Accordingly, when the corresponding frequency band is available through LBT (Listen before talk), it is possible to support the terminal by configuring an unlicensed band cell through the frequency band of the corresponding unlicensed band for a specific time. However, even if the unlicensed band cell is configured through the corresponding unlicensed band frequency, after a certain time, the specific frequency band must be emptied for another operator or another communication system for a specific time.
  • LBT Location before talk
  • an unlicensed band cell in an arbitrary frequency band may be referred to as an unlicensed band cell available period in which a time period in which an unlicensed band cell can be supported.
  • a time period in which an unlicensed band cell cannot be configured in a corresponding frequency band is referred to as an unlicensed band cell unavailable section.
  • this is also for convenience of description and the name is not limited.
  • a scheduling method for each SCell, and according to the configuration of the crosscarrierscheduling IE Scheduling or cross carrier scheduling has been set.
  • LAA licensed access cell
  • the present invention proposes a specific method for applying only cross-carrier scheduling through a cell configured through a licensed band in the case of an unlicensed band cell.
  • the present invention intends to propose a method of defining an unlicensed band cell so that cross-carrier scheduling is automatically applied.
  • FIG. 7 is a view for explaining the operation of the terminal according to an embodiment of the present invention.
  • a terminal configures carrier aggregation or dual connectivity including a licensed band cell and an unlicensed band cell and indicates whether a carrier indication field exists in the licensed band cell. And setting a value and receiving scheduling information of the unlicensed band cell in a licensed band cell, wherein the unlicensed band cell is a cell using a frequency of an unlicensed band shared by one or more communication systems.
  • a scheduling cell for transmitting and receiving scheduling information of an unlicensed band cell may be defined to be fixed as a licensed band cell.
  • the licensed band cell may be fixed to the PCell in case of carrier aggregation.
  • the licensed band cell may be fixed to the PCell of the master cell group (MCG) in dual connectivity.
  • the terminal of the present invention may include configuring a carrier aggregation or dual connectivity including a licensed band cell and an unlicensed band cell (S710).
  • the terminal may configure carrier aggregation or dual connectivity including an unlicensed band cell according to the setting of the base station. As described above, an example is described below as an unlicensed band cell, but the same may be applied to the case where the unlicensed band frequency is included as a CC.
  • the terminal may include setting a value indicating whether a carrier indication field exists in the licensed band cell (S720). That is, the terminal may set the unlicensed band cell to cross-carrier scheduling even without receiving a separate signal for indicating a conventional unlicensed band cell scheduling method. To this end, the UE may set a value indicating whether a carrier indication field exists in a licensed band cell that transmits and receives scheduling information of an unlicensed band cell. For example, the value indicating whether the carrier indication field exists may mean the value of the cif-presence field described above.
  • cross carrier scheduling may be automatically configured without additional 'crossCarrierSchedulingConfig' IE signaling for the corresponding unlicensed band cell.
  • the scheduling cell for the unlicensed band cell may be fixed as a primary cell of the MCG when DC is applied in a primary cell or a licensed band of a licensed band.
  • the PDSCH starting symbol in all downlink subframes or special subframes of the unlicensed band cell may be fixed as the first OFDM symbol. That is, the PDSCH starting symbol may be fixed to the OFDM symbol # 0.
  • a cif-presence value in a terminal that is merged with a corresponding unlicensed band cell and a base station configuring a primary cell through a licensed band with the terminal, setting a cif-presence value to true in a licensed band cell which is a scheduling cell for the unlicensed band cell.
  • the corresponding cif-presence value can be defined to be set implicitly to True without transmitting or receiving an RRC message.
  • the UE may set the scheduling method of the corresponding unlicensed band cell to cross-carrier scheduling without receiving a separate RRC message.
  • the terminal may include receiving scheduling information of the unlicensed band cell from the licensed band cell (S730).
  • the UE may receive scheduling information of an unlicensed band cell through a control channel (PDCCH or EPDCCH) of a licensed band cell which is a scheduling cell.
  • the DCI format transmitted through the control channel of the licensed band cell may include a carrier indicator field (CIF).
  • the terminal may decode scheduling information for the unlicensed band cell based on the DCI format including the CIF. If necessary, a time point at which the corresponding DCI format includes a cif may be variously determined.
  • the UE can configure the unlicensed band cell merged through CA or DC without cross layer signaling for cross-carrier scheduling.
  • FIG. 8 is a view for explaining the operation of the terminal according to the first embodiment of the present invention.
  • a value indicating whether a carrier indication field exists may be set to a value indicating that a carrier indication field exists when higher layer signaling for adding an unlicensed band cell to a secondary cell is received.
  • the terminal of the present invention may receive higher layer signaling for adding an unlicensed band cell (S810).
  • higher layer signaling may include configuration information for configuring an unlicensed band cell as a CA.
  • higher layer signaling may include configuration information for configuring an unlicensed band cell with DC.
  • the terminal may set a value indicating whether a carrier indication field exists for a primary cell of a licensed band which is a scheduling cell of an unlicensed band cell (S820). For example, when the terminal receives an RRC message including an SCell addition for an unlicensed band cell, the cif-presence configuration value for the primary cell of the terminal and the cif-presence information region in the corresponding RRC message. Whether it is included or not, the cif-presence value of the primary cell can be set to 'True'. That is, when a message for adding an unlicensed band cell is received, the terminal may set a cif-presence value of a scheduling cell of the corresponding unlicensed band cell to 'True' for cross carrier scheduling configuration.
  • the terminal may monitor the scheduling information of the unlicensed band cell in the primary cell of the corresponding licensed band cell (S830).
  • the UE may monitor a control channel (PDCCH or EPDCCH) for receiving scheduling information in the primary cell.
  • PDCCH control channel
  • the UE may perform decoding based on a DCI format including a cif information region including 3 bits.
  • the USS for transmitting scheduling information for the unlicensed band cell is applied to a conventional USS configuration method through a PDCCH or an EPDCCH control region. Can be defined.
  • the UE may perform monitoring for receiving scheduling information for the unlicensed band cell in the USS of the PDCCH or EPDCCH of the corresponding licensed band cell.
  • the terminal may automatically set the cross-carrier scheduling of the unlicensed band cell even without receiving the separate cross-carrier scheduling configuration information for the unlicensed band cell.
  • Second Embodiment A method of defining a corresponding cif-presence value to be set implicitly to True upon activation of an unlicensed band cell
  • FIG. 9 is a view for explaining the operation of the terminal according to the second embodiment of the present invention.
  • a value indicating whether a carrier indication field exists may be set to a value indicating that a carrier indication field exists when activation indication information of an unlicensed band cell is received.
  • the terminal of the present invention may receive higher layer signaling for adding an unlicensed band cell (S910).
  • higher layer signaling may include configuration information for configuring an unlicensed band cell as a CA.
  • higher layer signaling may include configuration information for configuring an unlicensed band cell with DC.
  • the terminal may receive indication information indicating activation for the additionally configured unlicensed band cell (S920).
  • indication information indicating activation of an unlicensed band cell may be received through a MAC CE.
  • the terminal may set cross-carrier scheduling of the unlicensed band cell (S920). For example, the terminal may set the cif-presence value for the primary cell of the licensed band cell to receive scheduling information of the unlicensed band cell to True. That is, the terminal may set the cif-presence value of the scheduling cell of the unlicensed band cell to True when receiving information indicating activation of the corresponding unlicensed band cell without receiving cross-carrier scheduling information.
  • the terminal may monitor the scheduling information of the unlicensed band cell in the primary cell of the licensed band cell (S930).
  • the UE may monitor a control channel (PDCCH or EPDCCH) for receiving scheduling information in the primary cell.
  • PDCCH control channel
  • the UE may perform decoding based on a DCI format including a cif information region including 3 bits.
  • the USS for transmitting scheduling information for the corresponding unlicensed band cell may be defined by the existing USS configuration method through the PDCCH or EPDCCH control region. The UE may perform monitoring for receiving scheduling information for the unlicensed band cell in the USS of the PDCCH or EPDCCH of the corresponding licensed band cell.
  • the terminal may automatically set the cross-carrier scheduling of the unlicensed band cell even without receiving the separate cross-carrier scheduling configuration information for the unlicensed band cell.
  • the primary cell of the licensed band cell when the release of each unlicensed band cell or the deactivation of the unlicensed band cell is made, the primary cell of the licensed band cell
  • the cif value of the (primary cell) may be reset to the setting value of the last cif-presence value set by the RRC message.
  • the primary cell of the licensed band if there is another SCell in which cross-carrier scheduling is performed through the primary cell of the licensed band, it may be maintained as a true value. This is because the primary cell of the licensed band needs to receive scheduling information of a cell other than the released or deactivated unlicensed band cell. If there is no other SCell in which cross-carrier scheduling is performed through the primary cell of the licensed band, it may be reset to a false value.
  • FIG. 10 is a view for explaining the operation of the terminal according to the third embodiment of the present invention.
  • a value indicating whether a carrier indication field exists may be set to a value indicating that a carrier indication field exists when an unlicensed band cell is in an ON state or an available interval.
  • the terminal of the present invention may receive higher layer signaling for adding an unlicensed band cell (S1010).
  • higher layer signaling may include configuration information for configuring an unlicensed band cell as a CA.
  • higher layer signaling may include configuration information for configuring an unlicensed band cell with DC.
  • the terminal may receive the indication information indicating the activation (activation) for the additionally configured unlicensed band cell (S1010).
  • indication information indicating activation of an unlicensed band cell may be received through a MAC CE.
  • the terminal may receive state information of the unlicensed band cell or information on available intervals (S1020). For example, the terminal may explicitly or implicitly receive information on whether the corresponding unlicensed band cell is in an on state or in an off state. That is, the terminal may receive state information of the corresponding unlicensed band cell. As another example, the terminal may receive information on an available period or an unavailable period of the unlicensed band cell described with reference to FIG. 6. In other words, in the case of an unlicensed band cell, an available period and use depending on whether there is another RAT-based radio signal through the frequency of the unlicensed band in which the corresponding unlicensed band cell is configured or whether another operator configures an unlicensed band cell Unavailable periods may occur periodically or irregularly.
  • the terminal may check whether the corresponding unlicensed band cell is available or unavailable. Alternatively, the terminal may check whether the corresponding unlicensed band cell is in an on state or an off state.
  • the terminal may set cross-carrier scheduling of the unlicensed band cell when the corresponding unlicensed band cell is in an on state or available interval (S1030). For example, the terminal may control the cif-presence value of the primary cell of the licensed band, which is a scheduling cell of the unlicensed band cell, to be set to a True value when the corresponding unlicensed band cell is in an available interval or on state.
  • the terminal may monitor the scheduling information of the unlicensed band cell in the primary cell of the licensed band cell (S1040).
  • the UE may monitor a control channel (PDCCH or EPDCCH) for receiving scheduling information in the primary cell.
  • PDCCH control channel
  • the UE may perform decoding based on a DCI format including a cif information region including 3 bits.
  • the USS for transmitting scheduling information for the corresponding unlicensed band cell may be defined by the existing USS configuration method through the PDCCH or EPDCCH control region. The UE may perform monitoring for receiving scheduling information for the unlicensed band cell in the USS of the PDCCH or EPDCCH of the corresponding licensed band cell.
  • the terminal may automatically set the cross-carrier scheduling of the unlicensed band cell even without receiving the separate cross-carrier scheduling configuration information for the unlicensed band cell.
  • the cif-presence value is reset again to the last setting value of the cif-presence value set by the RRC message. can do.
  • the primary cell of the licensed band may be maintained as a True value. This is because the primary cell of the licensed band needs to receive scheduling information of a cell other than the released or deactivated unlicensed band cell. If there is no other SCell in which cross-carrier scheduling is performed through the primary cell of the licensed band, it may be reset to a false value.
  • the terminal when the value indicating whether the carrier indication field is present is set to a value indicating that the carrier indication field exists, the terminal performs decoding based on a downlink control information format including a carrier indication field value to thereby perform an unlicensed band.
  • the scheduling information of the cell may be received.
  • FIG. 11 is a diagram for explaining an operation of a base station according to another embodiment of the present invention.
  • a base station configures carrier aggregation or dual connectivity including a licensed band cell and an unlicensed band cell in a terminal, and scheduling information of the unlicensed band cell in the licensed band cell.
  • the method includes transmitting a signal, wherein the terminal sets a value indicating whether a carrier indication field exists in a licensed band cell, and the unlicensed band cell is a cell using a frequency of an unlicensed band shared by one or more communication systems. .
  • the base station of the present invention may include configuring a carrier aggregation or dual connectivity including a licensed band cell and an unlicensed band cell in a terminal (S1110).
  • the base station may generate configuration information for configuring a carrier merge or dual connectivity using an unlicensed band cell in the terminal and transmit the configuration information to the terminal.
  • the terminal may configure carrier aggregation or dual connectivity using the licensed band cell and the unlicensed band cell.
  • the terminal may set a value indicating whether a carrier indication field exists in a licensed band cell and automatically set the unlicensed band cell to cross carrier scheduling.
  • the method for configuring the unlicensed band cell by the UE and the base station to cross carrier scheduling without a separate configuration signal may have various embodiments.
  • a value indicating whether a carrier indication field exists may be set to a value indicating that a carrier indication field exists when higher layer signaling for adding an unlicensed band cell to a secondary cell is transmitted.
  • the terminal may configure cross carrier scheduling while additionally configuring the corresponding unlicensed band cell.
  • a value indicating whether a carrier indication field exists may be set to a value indicating that a carrier indication field exists when the base station transmits activation indication information of an unlicensed band cell.
  • the terminal may set cross carrier scheduling for the corresponding unlicensed band cell.
  • a value indicating whether a carrier indication field exists may be set to a value indicating that a carrier indication field exists when an unlicensed band cell is in an on state or available interval.
  • the base station transmits additional configuration or activation information for the unlicensed band cell, and the terminal may set cross-carrier scheduling for the unlicensed band cell if it is determined that the unlicensed band cell is in an on state or available interval. have.
  • the base station may include transmitting scheduling information of an unlicensed band cell from the licensed band cell (S1120).
  • the base station may transmit the scheduling information for the unlicensed band cell to the terminal through the licensed band cell.
  • scheduling information for an unlicensed band cell may be transmitted through a control channel (PDCCH or EPDCCH) of the licensed band cell.
  • the licensed band cell may be a primary cell in case of carrier aggregation and a primary cell of a master cell group in case of dual connectivity.
  • the scheduling information may be encoded and transmitted based on a downlink control information format including a carrier indication field value when a value indicating whether a carrier indication field is present is set to a value indicating that a carrier indication field exists. have.
  • the base station can perform all the operations of the above-described embodiments of the present invention.
  • FIG. 12 is a view for explaining a terminal configuration according to another embodiment of the present invention.
  • the user terminal 1200 configures carrier aggregation or dual connectivity including a licensed band cell and an unlicensed band cell, and performs a licensed band.
  • a control unit 1210 for setting a value indicating whether a carrier indication field exists in a cell and a receiving unit 1230 for receiving scheduling information of an unlicensed band cell in a licensed band cell may be included.
  • the controller 1210 may configure carrier aggregation or dual connectivity including a licensed band cell and an unlicensed band cell.
  • Carrier merge or dual connectivity may be configured by receiving the configuration information from the base station.
  • the controller 1210 may set a value indicating whether a carrier indication field exists in the licensed band cell.
  • the controller 1210 may set the unlicensed band cell to cross-carrier scheduling even if separate indication information for the unlicensed band cell is not received. For example, when information for additionally configuring an unlicensed band cell is received from the base station, the controller 1210 may set a value indicating whether a carrier indication field exists to a value indicating that a carrier indication field exists.
  • the controller 1210 may set a value indicating whether the carrier indication field exists to a value indicating that the carrier indication field exists.
  • the controller 1210 may set a value indicating whether the carrier indication field exists when the unlicensed band cell is in an on state or an available interval, to a value indicating that the carrier indication field exists.
  • control unit 1210 controls the overall operation of the terminal required to perform the above-described present invention.
  • the receiver 1230 may receive scheduling information of an unlicensed band cell from a licensed band cell. For example, when the receiver 1230 is set to a value indicating that the carrier indication field exists, the receiver 1230 may perform decoding based on a downlink control information format including a carrier indication field value. Through the scheduling information of the unlicensed band cell can be received. In addition, the receiver 1230 may receive information for carrier aggregation or dual connectivity configuration from the base station, and receive downlink control information, data, and a message through a corresponding channel.
  • the transmitter 1130 transmits uplink control information, data, and messages to the base station using a licensed band cell or an unlicensed band cell through a corresponding channel.
  • FIG. 13 is a view for explaining the configuration of a base station according to another embodiment of the present invention.
  • the base station 1300 includes a control unit configured to configure carrier aggregation or dual connectivity including a licensed band cell and an unlicensed band cell in a terminal ( 1310 and the transmitter 1320 for transmitting scheduling information of the unlicensed band cell in the licensed band cell.
  • the controller 1310 may generate configuration information for configuring carrier aggregation or dual connectivity including a licensed band cell and an unlicensed band cell in the terminal. In addition, the controller 1310 controls the overall operation of the base station required to perform the above-described present invention.
  • the transmitter 1320 may transmit scheduling information of the unlicensed band cell from the licensed band cell. For example, when the transmitter 1320 is set to a value indicating whether the carrier indication field exists, the transmitter 1320 is encoded based on a downlink control information format including a carrier indication field value. The scheduling information may be transmitted. In addition, the transmitter 1320 may transmit the above-described configuration information of the carrier merge or dual connectivity to the terminal. In addition, the transmitter 1320 may transmit additional configuration information for the addition of the unlicensed band cell to the terminal, or may transmit information indicating the activation of the unlicensed band cell to the terminal. If necessary, the transmitter 1320 may transmit information about an available or unavailable period of the unlicensed band cell, or may transmit information indicating an on state or an off state of the unlicensed band cell.
  • the transmitter 1320 and the receiver 1330 are used to transmit and receive signals, messages, and data necessary for carrying out the above-described present invention.
  • the present invention described above has an effect of providing a specific method and apparatus for monitoring scheduling information of an unlicensed band cell for a terminal configuring carrier aggregation or dual connectivity using an unlicensed band cell.
  • the present invention has the effect of providing a specific operation method and apparatus when the unlicensed band cell configures carrier aggregation or dual connectivity.

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

Abstract

La présente invention concerne un procédé et un dispositif de prise en charge d'une technologie d'accès radio (RAT) basée LTE ou LTE-évolué, dans un spectre sans licence. Plus spécifiquement, la présente invention concerne un procédé et un dispositif par lesquels une cellule exécute une programmation au moyen d'un spectre sans licence. En particulier, la présente invention concerne un procédé et un dispositif par lesquels un terminal reçoit des informations de programmation d'une cellule de spectre sans licence. Le procédé comprend les étapes consistant à : configurer une agrégation de porteuses ou une double connectivité comprenant une cellule de spectre sous licence et une cellule de spectre sans licence ; définir une valeur indiquant si un champ existe, qui indique une porteuse de la cellule de spectre sous licence ; et recevoir les informations de programmation de la cellule de spectre sans licence, dans la cellule de spectre sous licence, la cellule de spectre sans licence utilisant une fréquence d'un spectre sans licence partagé par un ou plusieurs systèmes de communication.
PCT/KR2015/006637 2014-07-25 2015-06-29 Procédé de réception d'informations de programmation de cellule de spectre sans licence, et dispositif associé WO2016013779A1 (fr)

Applications Claiming Priority (4)

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KR20140095046 2014-07-25
KR10-2014-0095046 2014-07-25
KR10-2015-0080933 2015-06-09
KR1020150080933A KR20160013505A (ko) 2014-07-25 2015-06-09 비면허대역 셀의 스케줄링 정보 수신 방법 및 그 장치

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WO2022022673A1 (fr) * 2020-07-30 2022-02-03 华为技术有限公司 Procédé et dispositif de communication
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CN111865538B (zh) * 2019-04-30 2023-07-11 中国信息通信研究院 一种上行信道指示方法和设备
CN115769667A (zh) * 2020-07-06 2023-03-07 株式会社Ntt都科摩 终端、基站以及通信方法
WO2022022673A1 (fr) * 2020-07-30 2022-02-03 华为技术有限公司 Procédé et dispositif de communication

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