WO2017196095A2 - Procédé de configuration de double connectivité par un terminal, et appareil associé - Google Patents

Procédé de configuration de double connectivité par un terminal, et appareil associé Download PDF

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Publication number
WO2017196095A2
WO2017196095A2 PCT/KR2017/004873 KR2017004873W WO2017196095A2 WO 2017196095 A2 WO2017196095 A2 WO 2017196095A2 KR 2017004873 W KR2017004873 W KR 2017004873W WO 2017196095 A2 WO2017196095 A2 WO 2017196095A2
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WO
WIPO (PCT)
Prior art keywords
base station
terminal
radio resource
rrc
srb
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PCT/KR2017/004873
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English (en)
Korean (ko)
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WO2017196095A3 (fr
Inventor
홍성표
최우진
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KT Corp
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KT Corp
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Priority claimed from KR1020170057549A external-priority patent/KR102183826B1/ko
Application filed by KT Corp filed Critical KT Corp
Priority to CN201780029131.4A priority Critical patent/CN109076383B/zh
Priority to US16/300,557 priority patent/US10721118B2/en
Publication of WO2017196095A2 publication Critical patent/WO2017196095A2/fr
Publication of WO2017196095A3 publication Critical patent/WO2017196095A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections

Definitions

  • the present disclosure relates to a method and an apparatus in which a terminal configures dual connectivity.
  • the present disclosure relates to a specific method and apparatus for configuring a multi-connectivity of a terminal using a plurality of base stations using different radio access networks (eg, different radio access technologies).
  • LTE Long Term Evolution
  • 5G Long Term Evolution-Advanced
  • 3GPP 3rd Generation Partnership Project
  • the present disclosure intends to propose a specific procedure and operation for providing a dual connectivity by a terminal using a plurality of base stations.
  • the present disclosure is to propose a specific method and apparatus for configuring a dual connectivity terminal by using a plurality of base stations using different radio access network technology.
  • an embodiment of the present invention provides a method for configuring a dual connectivity by adding a secondary base station signaling radio bearer (SRB) and a secondary base station or secondary cell group through a secondary base station SRB.
  • SRB secondary base station signaling radio bearer
  • RRC radio resource control
  • an embodiment is a method for a secondary base station to control the dual connectivity of the terminal, the step of determining the addition of the secondary base station Signaling Radio Bearer (SRB) to the terminal and the radio for the secondary base station or the secondary cell group through the secondary base station SRB A step of transmitting a radio resource control (RRC) message including resource configuration information to the terminal and if the terminal succeeds in applying radio resources to the secondary base station (comply), the secondary base station SRB to receive a response message for the radio resource configuration from the terminal Including the step of receiving through, the terminal provides a method for configuring a dual connectivity using the master base station and the secondary base station.
  • RRC radio resource control
  • an embodiment is an RRC including radio resource configuration information for a secondary base station or a secondary cell group through a control unit configured to add a secondary base station signaling radio bearer (SRB) and a secondary base station SRB in a terminal configuring dual connectivity.
  • a terminal apparatus including a receiver for receiving a Radio Resource Control message and a transmitter for transmitting a failure information message to a master base station when the radio resource configuration information included in the RRC message cannot be applied.
  • an embodiment of the present invention provides a secondary base station for controlling dual connectivity of a terminal, and includes configuring a radio resource for a secondary base station or a secondary cell group through a control unit for determining the addition of a secondary base station signaling radio bearer (SRB) to the terminal and a secondary base station SRB.
  • a control unit for determining the addition of a secondary base station signaling radio bearer (SRB) to the terminal and a secondary base station SRB.
  • RRC radio resource control
  • the terminal Including a receiving unit for receiving, the terminal provides a secondary base station apparatus, characterized in that for configuring the dual connectivity using the master base station and the secondary base station.
  • the terminal may provide a better service by configuring dual connectivity using a plurality of base stations using different radio access network technologies.
  • a terminal may perform an operation without error in configuring dual connectivity using a base station using different radio access network technologies.
  • FIG. 1 is a diagram for exemplarily describing a secondary base station addition procedure according to the related art.
  • FIG. 2 is a diagram illustrating an operation of a terminal according to an exemplary embodiment.
  • FIG. 3 is a diagram for describing an operation of a base station according to an exemplary embodiment.
  • FIG. 4 is a diagram illustrating a dual connectivity SRB configuration according to one embodiment.
  • FIG. 5 is a diagram illustrating a dual connectivity SRB configuration according to another embodiment.
  • FIG. 6 illustrates a dual connectivity SRB configuration according to another embodiment.
  • FIG. 7 is a diagram for describing a terminal configuration, according to an exemplary embodiment.
  • FIG. 8 is a diagram illustrating a configuration of a base station according to an embodiment.
  • the MTC terminal may mean a terminal supporting low cost (or low complexity) or a terminal supporting coverage enhancement.
  • the MTC terminal may mean a terminal supporting low cost (or low complexity) and coverage enhancement.
  • the MTC terminal may mean a terminal defined in a specific category for supporting low cost (or low complexity) and / or coverage enhancement.
  • the MTC terminal may mean a newly defined 3GPP Release-13 low cost (or low complexity) UE category / type for performing LTE-based MTC related operations.
  • the MTC terminal supports enhanced coverage compared to the existing LTE coverage, or supports UE category / type defined in the existing 3GPP Release-12 or lower, or newly defined Release-13 low cost (or lower power consumption).
  • low complexity can mean UE category / type.
  • 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 the viewpoint of the user terminal or the position of a neighboring base station.
  • megacells macrocells, microcells, picocells, femtocells, small cells, RRHs, antennas, RUs, low power nodes (LPNs), points, eNBs, transmission / reception points, transmission points, and reception points are collectively referred to as base stations. do.
  • LPNs low power nodes
  • 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
  • UMB Universal Mobile Broadband
  • 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 described in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a 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
  • LTE technology supports a dual connectivity technology for the terminal to use the two base station radio resources at the same time.
  • the dual connectivity operation is configured to use radio resources provided by two different schedulers located in connection with two base stations connected through non-ideal backhaul.
  • the terminal may provide a service through two base stations.
  • the terminal may perform communication using a master base station (MeNB) and a secondary base station (SeNB).
  • the master base station may provide an RRC connection to the terminal, and may mean a base station that is a reference for handover, and the secondary base station may mean a base station that provides additional radio resources to the terminal.
  • SeNB addition procedure for setting the terminal context to the SeNB is used.
  • FIG. 1 is a diagram for exemplarily describing a secondary base station addition procedure according to the related art.
  • the MeNB 110 requests the SeNB 120 to allocate radio resources to indicate characteristics for a specific E-RAB (The MeNB 110 decides to request the SeNB 120 to allocate radio). resources for a specific E-RAB, indicating E-RAB characteristics (E-RAB parameters, TNL address information corresponding to the UP option)).
  • MeNB 110 uses the MCG configuration (including security algorithm for SCG bearer) and overall UE functions for UE function coordination in SCG-ConfigInfo as a basis for reconfiguration by SeNB 120 but does not include SCG configuration.
  • MeNB (110) indicates within SCG - ConfigInfo the MCG configuration (including security algorithm for SCG bearer) and the entire UE capabilities for UE capability coordination to be used as basis for the reconfiguration by the SeNB 120) , but does not include SCG configuration).
  • the MeNB 110 can provide the latest measurement results for the SCG cell (s) requested to be added).
  • SeNB 120 may reject the request (The SeNB 120 may reject the request).
  • the RRC entity allocates each radio resource and allocates each transport network resource according to the bearer option (If the RRM entity). in the SeNB (120) is able to admit the resource request, it allocates respective radio resources and, dependent on the bearer option, respective transport network resources).
  • the SeNB 120 triggers random access to perform synchronization of the SeNB 120 radio resource configuration (The SeNB 120 triggers Random Access so that synchronization of the SeNB 120 radio resource configuration can be performed).
  • the SeNB 120 provides the new radio resource of the SCG of SCG - Config to the MeNB 110 (The SeNB 120 provides the new radio resource of SCG in SCG - Config to the MeNB 110).
  • the MeNB 110 approves the new configuration through step S102, the MeNB 110 sends an RRCConnectionReconfiguration message to the UE, including the new radio resource configuration of the SCG according to the SCG-Config (If the MeNB 110). endorses the new configuration, the MeNB (110) sends the RRCConnectionReconfiguration message to the UE including the new radio resource configuration of SCG according to the SCG-Config) .
  • step S103 the UE 100 applies the new configuration and responds with a RRCConnectionReconfigurationComplete message (The UE applies the new configuration and replies with RRCConnectionReconfigurationComplete message). If the UE 100 fails to apply (part of) the configuration included in the RRCConnectionReconfiguration message, the UE 100 performs a reconfiguration failure procedure (In case the UE is unable to comply with (part of) the configuration included in the RRCConnectionReconfiguration message, it performs the reconfiguration failure procedure).
  • step S104 the MeNB 110 informs the SeNB 120 that the UE 100 has successfully completed the reconfiguration procedure (The MeNB 110 informs the SeNB 120 that the UE has completed the reconfiguration procedure successfully ).
  • step S105 the UE 100 performs synchronization with respect to the PSCell of the SeNB 120 (The UE performs synchronization towards the PSCell of the SeNB 120).
  • the order the UE sends the RRCConnectionReconfigurationComplete message and performs the Random Access procedure towards the SCG is not defined.
  • the successful RA procedure towards the SCG is not required for a successful completion of the RRC Connection Reconfiguration procedure.
  • the MeNB 110 can take measures to minimize service interruption due to activation of dual connectivity (data transfer, SN status transmission). (In case SCG bearers, and dependent on the bearer characteristics of the respective E-RAB, the MeNB (110) may take actions to minimise service interruption due to activation of dual connectivity (Data forwarding, SN Status Transfer)).
  • the UE 100 applies the new configuration as in step S103. If the UE 100 cannot comply with the (some) configuration included in the RRC connection reconfiguration message, the UE 100 performs a reconfiguration failure procedure.
  • the MeNB 110 could understand the radio resource control (RRC) message of the SeNB 120.
  • RRC radio resource control
  • the MeNB 110 In consideration of coordination between UE capabilities and SeNB 120, the MeNB 110 generates a final RRC message and instructs the UE 100 to efficiently use radio resources by two base stations. .
  • the RRC message could only be provided over the air interface of the UE 100 and the MeNB 110.
  • NR next generation radio access technology
  • the RAN architecture needs to support tight interworking between NR and LTE. It is anticipated that LTE dual connectivity technology can be recycled for tight interworking between NR and LTE.
  • LTE dual connectivity technology can be recycled for tight interworking between NR and LTE.
  • NR will introduce numerous evolutionary features on the physical layer, Layer 2 protocols and procedures. Therefore, when supporting tight interworking between LTE and NR, it is practically difficult for the LTE base station to support all the features of NR to be evolved in the future. Because whenever the NR base station evolves, updating the LTE base station together also puts an excessive burden on the currently deployed LTE base station.
  • the LTE base station should be able to operate even if the base station does not understand the RRC message generated by the NR base station.
  • the LTE base station may have a problem in that the NR base station cannot check the radio resource configuration change of the NR base station and thus cannot configure the terminal without exceeding the terminal capability.
  • the RRC message may be transmitted only through the MeNB.
  • radio resource configuration information of the SeNB may be configured in the terminal through the MeNB. Therefore, the transmission delay between base stations could always be added to change the radio resources of the NR base station.
  • LTE-based dual connectivity technology is currently provided based on coordination between LTE base stations. That is, both base stations can support the LTE feature as an LTE base station. In addition, there was a problem that the NR base station cannot directly generate and deliver an RRC message.
  • the present disclosure provides a signaling radio bearer to an LTE base station, an NR base station, and a terminal to provide radio resource control signaling for LTE-NR dual connectivity operation supporting tight interworking between LTE and NR.
  • An object of the present invention is to provide a method and an apparatus.
  • an object of the present invention is to provide an effective radio connection processing method in a signaling process between an LTE base station, an NR base station and a terminal.
  • the present disclosure can be applied not only to LTE mobile communication terminals but also to next-generation mobile communication (eg, 5G mobile communication) terminals.
  • next-generation mobile communication eg, 5G mobile communication
  • the base station may refer to an LTE base station, which is an eNodeB of LTE / E-UTRAN, or a gNodeB, an NR node, or an NR base station in a 5G wireless network in which a central unit (CU) and a distributed unit (DU) are separated.
  • the LTE base station is described as a master base station as necessary and the NR base station is described as a secondary base station. It is described and described. However, the present disclosure may be applied to dual connectivity between LTE base stations, and may be equally applied to the case where the secondary base station is an LTE base station.
  • the LTE base station is described as the master base station (MeNB), and the NR base station is referred to as the secondary base station (SeNB). List it.
  • the name of each base station is for convenience of understanding, and an LTE base station may mean an eNB, and an NR base station may mean a gNB. That is, the present disclosure describes base stations by distinguishing base stations using different radio access technologies, and the terms are not limited thereto.
  • the core network connection may consider the following scenario.
  • the control plane is connected between the LTE base station and the EPC entity (MME), and the user plane can be separated from the core network or the wireless network.
  • MME EPC entity
  • the control plane is connected between the NR base station and the NG-Core control plane entity, and the user plane is connected to the core or wireless network. Can be separated.
  • the control plane is connected between the LTE base station and the NG-Core control plane entity, and the user plane is in the core network or wireless network. Can be separated.
  • dual connectivity With dual or multi connectivity for NR (hereinafter referred to as dual connectivity for ease of explanation, it is also within the scope of the present invention to provide two or more connectivity). The following three cases can be considered.
  • FIG. 2 is a diagram illustrating an operation of a terminal according to an exemplary embodiment.
  • the terminal configuring the dual connectivity may perform a step of adding and configuring a secondary base station SRB (Signalling Radio Bearer) (S210).
  • the terminal may configure the terminal by adding the secondary base station SRB according to the secondary base station SRB configuration information included in the RRC message received from the master base station.
  • the secondary base station means an NR base station.
  • the secondary base station SRB addition may be determined by the secondary base station. That is, the secondary base station may determine whether to add the secondary base station SRB to the terminal.
  • the adding of the secondary base station SRB may be configured when the master base station performs the secondary base station addition procedure.
  • the master base station and the secondary base station may be a base station using different radio access technologies (Radio Access Technology), the master base station may be the aforementioned eNB and the secondary base station may be a gNB.
  • Radio Access Technology Radio Access Technology
  • the terminal may perform a step of receiving a Radio Resource Control (RRC) message including radio resource configuration information for the secondary base station or the secondary cell group through the secondary base station SRB (S220).
  • RRC Radio Resource Control
  • the terminal may receive radio resource configuration information for the secondary base station through the secondary base station SRB additionally configured.
  • the terminal may receive radio resource configuration information for the secondary cell group through the secondary base station SRB. Radio resource configuration information for the secondary base station or the secondary cell group may be received in an RRC message.
  • RRC Radio Resource Control
  • the secondary cell group means one or more cells associated with the secondary base station, and one or more cells associated with the master base station may be described as a master cell group. That is, when the terminal configures dual connectivity, one cell of each base station may be used, or a plurality of cells controlled by each base station may be used.
  • the UE may perform a step of transmitting a failure information message to the master base station (S230). For example, the terminal may apply the secondary base station or the secondary cell group configuration to the terminal by using the received radio resource configuration information. However, for some reason, dual connectivity may not be configured using the received radio resource configuration information. In this case, the terminal may notify the failure of the dual connectivity configuration of the terminal by transmitting a failure information message to the master base station.
  • the radio resource for the secondary base station or the secondary cell group may be suspended.
  • the radio resource for the secondary base station or secondary cell group that is the target of the suspend may include the secondary cell group Data Radio Bearer (DRB), the secondary cell group SRB, the secondary cell group portion of the split DRB, and the split. It may be at least one of the secondary cell group portions of the SRB.
  • DRB secondary cell group Data Radio Bearer
  • the terminal cannot apply the radio resource configuration information included in the RRC message. Indicates a failure.
  • the failure information message transmitted to the master base station may include cause information on the failure of the secondary base station radio resource configuration.
  • the secondary base station can receive and confirm the information on the failure of the secondary base station radio resource configuration from the master base station.
  • the terminal when the terminal successfully applied and configured the received radio resource configuration information to the terminal, the terminal may transmit confirmation information on the radio resource configuration success through the secondary base station SRB to the secondary base station.
  • FIG. 3 is a diagram for describing an operation of a base station according to an exemplary embodiment.
  • the secondary base station controlling the dual connectivity of the terminal may perform the step of determining the addition of the secondary base station Signaling Radio Bearer (SRB) to the terminal (S300).
  • the secondary base station means an NR base station.
  • the secondary base station SRB addition may be determined by the secondary base station. That is, the secondary base station may determine whether to add the secondary base station SRB to the terminal.
  • the terminal may add the secondary base station SRB when the master base station performs the secondary base station addition procedure.
  • the master base station and the secondary base station may be a base station using different radio access technologies (Radio Access Technology), the master base station may be the aforementioned eNB and the secondary base station may be a gNB.
  • Radio Access Technology Radio Access Technology
  • the secondary base station may perform a step of transmitting a radio resource control (RRC) message including radio resource configuration information for the secondary base station or the secondary cell group to the terminal through the secondary base station SRB (S310).
  • RRC radio resource control
  • the secondary base station may transmit radio resource configuration information for the secondary base station to the terminal through the additionally configured secondary base station SRB.
  • the secondary base station may transmit radio resource configuration information for the secondary cell group through the secondary base station SRB.
  • Radio resource configuration information for the secondary base station or the secondary cell group may be included in the RRC message and transmitted.
  • the secondary cell group means one or more cells associated with the secondary base station, and one or more cells associated with the master base station may be described as a master cell group. That is, when the terminal configures dual connectivity, one cell of each base station may be used, or a plurality of cells controlled by each base station may be used.
  • the secondary base station may perform a step of receiving a response message for the radio resource configuration from the terminal through the secondary base station SRB (S320). Through this, the terminal may configure dual connectivity using the master base station and the secondary base station.
  • the terminal may not be able to configure dual connectivity using the received radio resource configuration information.
  • the terminal may notify the failure of the dual connectivity configuration of the terminal by transmitting a failure information message to the master base station.
  • the failure information message transmitted to the master base station may include cause information on the failure of the secondary base station radio resource configuration.
  • the secondary base station can receive and confirm the information on the failure of the secondary base station radio resource configuration from the master base station.
  • the radio resource for the secondary base station or the secondary cell group may be suspended.
  • the radio resource for the secondary base station or secondary cell group that is the target of the suspend may include the secondary cell group Data Radio Bearer (DRB), the secondary cell group SRB, the secondary cell group portion of the split DRB, and the split. It may be at least one of the secondary cell group portions of the SRB.
  • DRB secondary cell group Data Radio Bearer
  • the terminal cannot apply the radio resource configuration information included in the RRC message. Indicates a failure.
  • the terminal may configure dual connectivity using a plurality of base stations using different radio access technologies.
  • each LTE node is mainly responsible for the terminal resource configuration and allocation of the corresponding LTE node (cell group).
  • MeNB and SeNB can understand the RRC configuration of each other for the terminal.
  • the MeNB is used as basic data for reconfiguration by the SeNB in SCG-ConfigInfo, indicating the MCG configuration and overall UE capabilities for performing UE capability coordination.
  • the SeNB provides the MeNB with a new radio resource of the SCG in the SCG-Config.
  • NR will introduce numerous evolutionary features on the physical layer, Layer 2 protocols and procedures. Therefore, when supporting tight interworking between LTE and NR, it may not be practical to make it possible for the LTE base station to understand all the features of NR to be evolved in the future. LTE technology and NR technology can evolve independently according to their use cases. Therefore, except for some information elements for coordination between the LTE base station and the NR base station, the LTE base station should not be required to understand all the NR configurations.
  • the LTE base station may deliver specific information elements to be used as basic data for NR radio resource reconfiguration by the NR base station for coordination with the NR base station to the NR base station.
  • the NR base station may separate the information elements to be delivered to the LTE base station by the NR base station and the NR configuration information (or NR reconfiguration information) for configuring the NR radio resource of the terminal for coordination with the LTE base station and transmit the information to the LTE base station. have.
  • the LTE base station may transmit them to the terminal through an interface between the LTE base station and the terminal.
  • the LTE base station separates the information elements to be delivered to the NR base station by the LTE base station for coordination with the NR base station and the LTE configuration information (or LTE reconfiguration information) for configuring the LTE radio resource of the terminal to be delivered to the NR base station.
  • the NR base station may transmit it to the terminal through an interface between the NR base station and the terminal.
  • NR configuration information for configuring an NR radio resource of a terminal may be included in a container and transmitted to an LTE base station. The LTE base station can transparently transmit this information to the terminal.
  • the NR configuration information for configuring the NR radio resource of the terminal may be directly transmitted to the terminal through the interface between the NR base station and the terminal.
  • NR configuration information for example, radio resource configuration information
  • the LTE base station may transmit the LTE configuration information for configuring the LTE radio resource of the terminal together with the NR configuration information for configuring the NR radio resource of the terminal.
  • the NR configuration information for configuring the NR radio resource may be transmitted to the terminal by including the radio resource configuration information for configuring the LTE radio resource.
  • the radio resource specific configuration information for configuring the LTE radio resource and the NR radio resource dedicated configuration information for configuring the NR radio resource may be separated and transmitted to the terminal.
  • the terminal that receives the RRC message through the interface between the LTE base station and the terminal the LTE RRC message (or LTE radio resource-specific configuration information) including the LTE radio resource-specific configuration information in the LTE PDCP entity of the terminal.
  • the LTE PDCP entity of the terminal may transmit an RRC message (or NR radio resource-specific configuration information) including NR radio resource-specific configuration information to the LTE RRC entity.
  • An RRC message (or NR radio resource dedicated configuration information) including dedicated configuration information may be delivered to the LTE RRC entity.
  • the LTE RRC entity of the terminal may transmit an RRC message (or NR radio resource dedicated configuration information) including NR radio resource dedicated configuration information to the NR RRC entity.
  • An RRC message (or NR radio resource dedicated configuration information) including dedicated configuration information may be delivered to the LTE RRC entity.
  • the LTE RRC entity of the terminal may apply a new radio resource according to the NR radio resource-specific configuration information.
  • the NR base station can directly control the NR radio resources of the terminal.
  • NR base station NR cell / cell group / transmission point / transmission point group / transmission and reception point / transmission and reception point group / TRP / antenna / antenna group / beam addition / modification / release / management, NR measurement, NR measurement reporting, NR resource allocation,
  • One or more control functions of NR radio bearer addition / modification / release, NR radio resource configuration, and NR mobility control may be performed.
  • the NR base station may perform one or more of the above-described control functions for the terminal.
  • the following methods may be used independently or in combination to configure an NR base station (additional) radio resource at a terminal or to reconfigure an NR base station (additional) radio resource at a terminal.
  • the NR base station may transmit an NR RRC message (eg, an RRC message generated by the NR base station) to the terminal through the LTE base station.
  • the NR base station (or the RRC entity of the NR base station) forwards the NR RRC message including the NR RRC container / NR RRC IEs / NR RRC IEs to the LTE base station.
  • the LTE base station (or RRC entity of the LTE base station) may deliver the RRC message including the NR RRC container / NR RRC IEs / NR RRC IEs to the terminal (or RRC entity of the terminal) through the LTE SRB.
  • the LTE RRC may include an RRC message including NR RRC containers / NR RRC IEs / NR RRC IEs as a transparent container in an RRC reconfiguration message and deliver it to the terminal.
  • This method has an advantage in that the RRC configuration information of the NR base station can be delivered to the terminal with little change in the LTE base station.
  • this method increases the delay due to data transmission between the LTE base station and the NR base station.
  • the NR base station should receive a confirmation message for the NR RRC configuration of the terminal from the LTE base station. This is also a factor that causes delay.
  • the UE transmits an RRC message including an NR RRC container / NR RRC IEs / NR RRC IEs to the UE (or an RRC entity of the UE), the RRC entity of the UE directly RRC to the NR base station. Instruct to send a reconfiguration confirmation message.
  • the LTE RRC entity of the UE receiving the RRC message including the NR RRC container / NR RRC IEs / NR RRC IEs through the LTE SRB delivers / submits it to the NR RRC entity.
  • the NR RRC entity applies the new configuration.
  • the NR RRC entity responds to the RRC reconfiguration acknowledgment message via the interface between the terminal and the NR base station.
  • the RRC entity of the terminal receiving the RRC message including the NR RRC container / NR RRC IEs / NR RRC IEs through the LTE SRB applies a new configuration.
  • the RRC entity of the terminal responds to the RRC reconfiguration confirmation message via the interface between the terminal and the NR base station.
  • the RRC reconfiguration message (or RRC message including NR RRC container / NR RRC IEs / NR RRC IEs) may include information for indicating such operation of the terminal by the NR base station (or LTE base station).
  • the RRC reconfiguration message (or RRC message including NR RRC container / NR RRC IEs / NR RRC IEs) may include information for instructing the UE to generate / enable / activate an NR RRC entity.
  • the terminal NR The RRC entity may enable / activate the NR additional configuration (or the terminal may set / create the NR RRC entity).
  • the terminal may allow the NR RRC entity to disable / deactivate / deactivate.
  • an RRC reconfiguration message (or an RRC message including NR RRC container / NR RRC IEs / NR RRC IEs) may instruct the terminal to transmit an RRC confirmation message through an interface between the terminal and the NR base station in an NR RRC entity. It may include information for.
  • the RRC reconfiguration message (or RRC message including NR RRC container / NR RRC IEs / NR RRC IEs) is an NR for the terminal to transmit the RRC confirmation message through the interface between the terminal and the NR base station in the NR RRC entity It may include the base station SRB configuration information.
  • the NR base station may transmit an NR RRC message to the terminal through an interface between the NR base station and the terminal.
  • the NR base station may configure an SRB (eg, SRB1) between the terminal and the NR base station. This means that the NR base station determines the addition of an SRB (eg, SRB1) between the terminal and the NR base station for the corresponding terminal and generates configuration information therefor.
  • NR-SRB1 For reference, in the conventional LTE, SRB1 was performed in an RRC connection configuration, but SRB1 between the NR base station and the terminal (hereinafter, for convenience of description, a signaling radio bearer configured to transmit data through an interface between the NR base station and the terminal is referred to as NR-SRB1).
  • the configuration may be configured through an RRC reconfiguration message constituting LTE-NR dual connectivity (constituting NR additional radio resources).
  • the LTE base station should not set up the bearer before activating security for this bearer.
  • the LTE base station should not request the addition of an NR base station before activating security.
  • the NR base station may set the NR-SRB1 according to the request for adding the NR base station from the LTE base station.
  • the LTE base station forwards (or computes and delivers) the NR base station key (eg, NR-K eNB ) to the NR base station.
  • the NR base station selects an integrity protection algorithm and a ciphering algorithm.
  • the LTE base station transmits the selected integrity protection algorithm and the ciphering algorithm (or the identification information on the integrity protection algorithm and the ciphering algorithm) to service the NR-SRB1 for the terminal to the terminal.
  • the LTE base station (or NR base station) instructs the terminal to the counter (SCG Counter or NR Counter) for calculating the key value associated with the NR-SRB1.
  • the terminal calculates the NR base station key.
  • the terminal calculates a key value associated with NR-SRB1 (NR-K RRCint , NR-K RRCenc ).
  • the terminal is configured such that the lower layer (PDCP or L2 entity on NR) applies an integrity protection algorithm, a ciphering algorithm, NR-K RRCint , and NR-K RRCenc .
  • FIG. 4 is a diagram illustrating a dual connectivity SRB configuration according to one embodiment.
  • the L2 entity of the NR 450 of FIG. 4 may be composed of the RLC entity of the LTE 400, one or two entities that redistribute the LTE MAC entity function.
  • FIG. 4 an example in which an LTE-RRC object and an NR-RRC object are configured in the terminal 410, respectively, is also included in the scope of the present invention.
  • a single RRC entity / layer is configured in the terminal 410, data may be transmitted through the NR-SRB1 for the RRC message received from the NR base station 450 and for the corresponding response RRC message. If two RRC entities are configured in the terminal 410, data may be transmitted through the NR-SRB1 for the RRC message received from the NR base station 450 and for the corresponding response RRC message.
  • the NR base station 450 may preferentially process the NR-SRB1 over the DRB.
  • a specific logical channel identification value may be designated for NR-SRB1.
  • a logical channel identification value (for example, 1) such as SRB1 may be specified for NR-splitSRB1.
  • an SRB-identity value (eg, 1), such as SRB1, may be specified for NR-SRB1.
  • logical channel configuration values e.g., priority (1 or 2), prioritisedBitRate (infinite)
  • SRB1 may be specified for NR-SRB1.
  • the same logical channel identification information as SRB1 may be included, but the terminal may include information for identifying that the terminal is SCG SRB1.
  • it may include logical channel identification information different from SRB1, but may include the same logical channel configuration information as SRB1.
  • NR base station 450 NR cell / cell group / transmission point / transmission point group / transmission and reception point / transmission and reception point group / TRP / antenna / antenna group / beam addition / modification / release / management, NR measurement, NR measurement reporting, NR An NR RRC message including one or more control information of resource allocation, NR radio bearer addition / modification / release, NR radio resource configuration, and NR mobility control may be sent to the terminal 410.
  • the NR base station (or the RRC entity of the NR base station) 450 may deliver the NR RRC message including the NR RRC container / NR RRC IEs / NR RRC IEs to the terminal 410 through the NR-SRB1. .
  • the terminal When the terminal receives an NR RRC message (eg, an RRC Connection Reconfiguration message) through the NR-SRB1, the terminal may apply a new configuration by using the following methods individually or in combination.
  • the NR RRC message includes radio resource configuration information for the NR base station.
  • the NR RRC message may include secondary base station (NR base station) radio resource configuration information.
  • the terminal may configure the NR radio resource through the RRC entity.
  • the terminal performs the reconfiguration failure procedure if the terminal cannot comply with the (partial) configuration included in the RRC connection reconfiguration message. do.
  • the reconfiguration failure procedure in LTE is performed as follows.
  • the terminal If the terminal cannot comply with the (partial) configuration included in the RRC connection reconfiguration message, the terminal continues to use the configuration used before receiving the RRC connection reconfiguration message. If the security is not activated, the operation of leaving RRC_CONNECTED is performed with the cause of release as other. If not, initiate the connection re-establishment procedure.
  • the reconfiguration failure in LTE has caused service interruption by switching the terminal to idle mode or performing an RRC connection reconfiguration procedure.
  • the NR due to its nature, may fail due to various reasons in the NR radio resource configuration process. Therefore, when a failure occurs in the NR radio resource configuration process for any reason, it may be inefficient to switch the terminal to the idle mode or perform an RRC connection resetting procedure.
  • the UE does not trigger the reconfiguration failure procedure. You can do that. That is, it is possible to prevent the NR RRC configuration failure from triggering the LTE RRC configuration failure. For example, if NR RRC configuration fails, the UE sends an RRC message (for example, an SCG failure information message, a UE assistance message, or a newly defined NR failure information / NR status message) including the cause of the NR RRC configuration failure to the NR base station.
  • an RRC message for example, an SCG failure information message, a UE assistance message, or a newly defined NR failure information / NR status message
  • the UE sends an RRC message (for example, an SCG failure information message, a UE assistance message, or a newly defined NR failure information / NR status message) including the cause of the NR RRC configuration failure to the LTE base station.
  • an RRC message for example, an SCG failure information message, a UE assistance message, or a newly defined NR failure information / NR status message
  • the terminal may transmit the failure information to the master base station when the radio resource configuration of the secondary base station fails using the RRC message received through the SRB of the secondary base station.
  • the received RRC message includes configuration information for configuring an NR radio resource (eg, NR cell configuration information, NR bearer configuration information, control information for NR random access, NR measurement configuration information, NR mobility control, and NR radio resource only).
  • configuration information for additionally modifying an NR base station in dual connectivity or information for reconfiguring NR radio resources through the secondary base station SRB may include secondary base station radio resource configuration information, NR radio resource configuration information, and NR configuration information. Or as configuration information.
  • the terminal eg, terminal RRC entity
  • the terminal performs NR configuration.
  • the terminal eg, the terminal RRC entity performs NR configuration.
  • the terminal if the terminal cannot follow the NR configuration, the terminal continues to use the (NR) configuration used before receiving the RRC connection reconfiguration message (before receiving the NR configuration information).
  • the NR radio resource may include at least one of a secondary cell group DRB (secondary cell group DRB), a secondary cell group SRB, a secondary cell group part of a split DRB, and a secondary cell group part of a split SRB.
  • the RRC transmits an RRC message including the cause of the NR RRC configuration failure to the LTE base station.
  • the LTE base station forwards this to the NR base station.
  • the RRC may directly transmit an RRC message including the cause of the NR RRC configuration failure to the NR base station through an interface between the terminal and the NR base station.
  • the NR can include LTE and other evolutionary features independently.
  • LTE RRC and NR RRC may be configured.
  • the terminal performs the reconfiguration failure procedure if the terminal cannot comply with the (partial) configuration included in the RRC connection reconfiguration message. do.
  • the reconfiguration failure procedure in LTE is performed as follows.
  • the terminal If the terminal cannot follow the (partial) configuration included in the RRC connection reconfiguration message, the terminal continues to use the configuration used before receiving the RRC connection reconfiguration message. If security is not activated, RRC_CONNECTED is performed with the cause of release as other. If not, initiate the connection re-establishment procedure.
  • the reconfiguration failure in LTE has caused service interruption by switching the terminal to idle mode or performing an RRC connection reconfiguration procedure.
  • NR due to its nature, may have various reasons for failure in the NR addition process. Therefore, when a failure occurs in the NR addition process for any reason, it may be inefficient to switch the terminal to the idle mode or perform the RRC connection resetting procedure.
  • the UE may not trigger a reconfiguration failure procedure if the NR configuration included in the NR RRC message fails (or if the NR configuration included in the NR RRC message for some reason cannot be followed). . It is possible to ensure that the NR RRC configuration failure does not trigger the LTE RRC configuration failure. If the NR RRC configuration fails, the UE sends an RRC message (for example, an SCG failure information message, a UE assistance message, a newly defined NR failure information / NR status message) including the cause of the NR RRC configuration failure to the NR base station (or LTE base station). Can be sent. Or, if the terminal RRC cannot follow the NR configuration, the RRC transmits an RRC message including the cause of the NR RRC configuration failure to the LTE base station. The LTE base station forwards this to the NR base station.
  • an RRC message for example, an SCG failure information message, a UE assistance message, a newly defined NR failure information / NR status message
  • the terminal NR RRC performs NR configuration.
  • the terminal continues to use the (NR) configuration used before the RRC connection reconfiguration message is received (before the NR RRC receives the NR configuration information).
  • the NR radio resource may include at least one of a secondary cell group DRB (secondary cell group DRB), a secondary cell group SRB, a secondary cell group part of a split DRB, and a secondary cell group part of a split SRB.
  • the terminal can not follow the NR configuration, release the NR radio resources
  • the NR RRC indicates the NR reconfiguration failure to the LTE RRC.
  • the LTE RRC sends an RRC message including the cause of the NR RRC configuration failure to the LTE base station.
  • the LTE base station forwards this to the NR base station.
  • the NR RRC directly transmits the RRC message including the cause of the NR RRC configuration failure to the NR base station through the interface between the terminal and the NR base station.
  • the terminal When detecting a radio link problem (failure) on the NR physical layer, the terminal may indicate the NR physical layer failure to the RRC entity.
  • the RRC entity may indicate to the LTE base station via the LTE SRB an RRC message containing the cause of failure for the NR physical layer failure.
  • the terminal may inform the base station.
  • the UE may inform the LTE base station through an interface between the UE and the LTE base station.
  • the LTE base station delivers this to the NR base station.
  • the UE may inform the NR base station through an interface between the UE and the NR base station.
  • the UE may transmit an RRC connection reconfiguration message including NR additional information (for example, one or more of NR cell configuration information, NR bearer configuration information, control information for NR random access, and NR radio resource configuration information).
  • NR additional information for example, one or more of NR cell configuration information, NR bearer configuration information, control information for NR random access, and NR radio resource configuration information.
  • the terminal may perform one or more of the following operations.
  • NR additional information e.g., one or more of NR cell configuration information, NR bearer configuration information, control information for NR random access, and NR radio resource only configuration information
  • the terminal If the terminal initiates the transmission of the NR failure information message, the terminal includes a failure type. And set it to NR radio failure.
  • the NR radio addition failure may indicate that a connection to the NR fails due to a different cause from the aforementioned NR reconfiguration failure.
  • the terminal may transmit it to the base station through various operations. In addition, it is possible to perform the terminal operation according to the failure.
  • the NR may instruct the radio bearer / wireless connection / wireless flow that uses the NR to suspend the connection first according to the use of high frequency, and then initiate the NR transmission through the radio bearer / wireless connection / wireless flow that transmits the actual data. have.
  • an RRC connection reconfiguration message for setting up a radio bearer / wireless connection / wireless flow using NR is received and a confirmation message is received, and a radio / bearer / Information indicating data transmission through a wireless connection / wireless flow may be transmitted to the terminal.
  • it may include information for instructing to initiate transmission by selecting between data transmission through LTE and data transmission through NR for a specific radio bearer / wireless connection / wireless flow.
  • NR RRC configuration failure (or NR RRC connection failure / NR radio resource addition failure / NR radio link failure) may not trigger LTE RRC configuration failure (LTE RRC connection failure).
  • the NR may include other wireless communication features than LTE, and the LTE base station may not understand the RRC message generated by the NR base station.
  • NR can also be built in the high frequency band (eg, high frequency above 6 GHz). In this case, fast SINR drops may occur due to high frequency band link blockage and high transmission loss. And it can cause problems when sending NR RRC. To compensate for this problem, the NR RRC message can be sent using both the interface between the NR base station and the terminal and the interface between the LTE base station and the terminal.
  • the NR RRC message can be sent using both the interface between the NR base station and the terminal and the interface between the LTE base station and the terminal.
  • FIG. 5 is a diagram illustrating a dual connectivity SRB configuration according to another embodiment.
  • the NR base station 550 may be configured as the terminal 510 by the LTE base station ( It is possible to configure an SRB (eg, SRB1 type) that can use both 500 and NR base station 550.
  • SRB that can use both LTE base station 500 and NR base station 550
  • NR-splitSRB1 a signaling radio bearer configured so that the NR base station can use both the LTE base station and the NR base station.
  • the configuration may be configured via an RRC reconfiguration message that (re) configures LTE-NR dual connectivity (which constitutes NR additional radio resources).
  • NR-splitSRB1 security must always be activated from the start.
  • the NR base station 550 should not set this bearer until it activates security.
  • the LTE base station 500 should not request the addition of the NR base station 550 before activating security.
  • the NR base station 550 should not request the LTE base station 500 to add the NR-splitSRB1 before activating security.
  • the NR base station 550 may set NR-splitSRB1 according to a request for adding an NR base station of the LTE base station 500.
  • the NR base station 550 may set NR-splitSRB1 as needed.
  • the LTE base station 500 passes (or computes and delivers) an NR base station key (eg, NR-K eNB ) to the NR base station 550.
  • NR base station 550 selects an integrity protection algorithm and a ciphering algorithm.
  • the UE transmits the selected integrity protection algorithm and the ciphering algorithm (or the identification information on the integrity protection algorithm and the ciphering algorithm) to service the NR-splitSRB1 to the terminal 510 through the LTE base station 500.
  • LTE base station 500 indicates a counter (SCG Counter or NR Counter) for the terminal 510 to calculate the key value associated with NR-splitSRB1.
  • the terminal 510 calculates the NR base station key.
  • the terminal 510 calculates a key value associated with NR-SRB1 (NR-K RRCint , NR-K RRCenc ).
  • the terminal 510 configures the lower layer (PDCP or L2 entity on NR) to apply an integrity protection algorithm, a ciphering algorithm, NR-K RRCint , and NR-K RRCenc .
  • the NR base station 550 may indicate the information for configuring the NR-splitSRB1 to the LTE base station 500.
  • the LTE base station 500 may not understand the NR RRC container / NR RRC IEs of the NR base station 550.
  • the NR base station 550 may include information for instructing the LTE base station 500 to configure NR-splitSRB1 in a signaling message on an interface between the NR base station 550 and the LTE base station 500.
  • the LTE base station 500 may instruct the terminal 510 to configure the information for configuring the NR-splitSRB1.
  • the LTE base station 500 may instruct the terminal 510 to preferentially process the NR-splitSRB1 over the DRB.
  • a specific logical channel identification value may be designated for NR-splitSRB1.
  • the terminal 510 may preferentially process the logical channel designated as NR-splitSRB1 over the DRB.
  • a logical channel identification value (1) such as SRB1 may be specified for NR-splitSRB1.
  • information for processing NR-splitSRB1 at the same priority as SRB1 may be indicated.
  • information for indicating that the signaling bearer may be indicated for NR-splitSRB1.
  • logical channel identification information different from SRB1 is specified for NR-splitSRB1, but information for processing at the same priority as SRB1 may be indicated. For example, it may include the same logical channel configuration information as SRB1.
  • an SRB-identity value eg, 1
  • SRB1 such as SRB1
  • a logical channel configuration value eg priority (1 or 2), prioritisedBitRate (infinite)
  • the same logical channel identification information as SRB1 may be included, but the terminal may include information for identifying an entity for NR-split SRB1.
  • it may include logical channel identification information different from SRB1, but may include the same logical channel configuration information as SRB1.
  • the NR may include other wireless communication features than LTE, and the LTE base station may not understand the RRC message generated by the NR base station.
  • NR can also be built in the high frequency band (eg, high frequency above 6 GHz).
  • high frequency band link blockage and high transmission loss can cause fast SINR drops and cause problems when sending NR RRC.
  • the NR RRC message can be sent using both the interface between the NR base station and the terminal and the interface between the LTE base station and the terminal.
  • some uplink or downlink RRC message may be preferably delivered first through the LTE base station for reliability.
  • FIG. 6 illustrates a dual connectivity SRB configuration according to another embodiment.
  • the LTE base station 600 when configuring the LTE-NR dual connectivity in the terminal 610 (when configuring an NR additional radio resource), the LTE base station 600 is a terminal 610 is an LTE base station 600 It is possible to configure an SRB (e.g. of type SRB1) that can use both the and NR base station 650. SRB that can use both LTE base station 600 and NR base station 650 (For convenience of description, a signaling radio bearer configured so that the LTE base station can use both the LTE base station and the NR base station will be referred to as LTE-splitSRB1.
  • the configuration may be configured via an RRC reconfiguration message that (re) configures LTE-NR dual connectivity (which constitutes NR additional radio resources).
  • LTE-splitSRB1 For this purpose, for LTE-splitSRB1, security must always be activated from the start.
  • the LTE base station 600 should not set this bearer until it activates security.
  • the LTE base station 600 should not request the addition of the NR base station 650 before activating security.
  • the NR base station 650 may set an NR configuration for the LTE-splitSRB1 according to the indication information included in the NR base station addition request of the LTE base station 600.
  • the LTE base station 600 transmits information to the NR base station 650 to indicate configuration of the LTE-splitSRB1.
  • the NR base station 650 transfers information (for example, one or more information of logaicalchannelconfig, logicalchannelIdentity, and rlcconfig) for configuring the NR part of the LTE-splitSRB1 to the terminal 610 through the LTE base station 600.
  • the NR base station 650 may instruct the LTE base station 600 information for confirming the configuration of the LTE-splitSRB1.
  • the LTE base station 600 may not understand the NR RRC container / NR RRC IEs of the NR base station 650.
  • the NR base station 650 may include, in the signaling message on the interface between the NR base station 650 and the LTE base station 600, the indication information for confirming the LTE-splitSRB1 configuration to the LTE base station 600.
  • the LTE base station 600 may instruct the terminal 610 to configure information for configuring the LTE part of the LTE-splitSRB1.
  • the LTE base station 600 may allow the LTE-splitSRB1 to be processed in preference to the DRB. For example, a specific logical channel identification value may be designated for LTE-splitSRB1.
  • the terminal 610 may be configured to process the logical channel designated as LTE-splitSRB1 in preference to the DRB.
  • a logical channel identification value (1) such as SRB1 may be specified for NR-splitSRB1 (or may be configured as SRB1 or SRB2).
  • the NR base station 650 may allow the LTE-splitSRB1 to take priority over the DRB.
  • a specific logical channel identification value may be designated for LTE-splitSRB1.
  • the terminal 610 may be configured to process the logical channel designated as LTE-splitSRB1 in preference to the DRB.
  • a logical channel identity value (1) such as SRB1
  • SRB1 may be specified for LTE-splitSRB1 (or may be configured as SRB1 or SRB2).
  • SRB1 may be configured for LTE-splitSRB1.
  • Information for processing at the same priority may be indicated.
  • information for indicating that the signaling bearer may be indicated for LTE-splitSRB1.
  • an SRB-identity value (eg, 1), such as SRB1 may be specified for LTE-splitSRB1.
  • a logical channel configuration value (eg priority (1 or 2), prioritisedBitRate (infinite)), such as SRB1, may be specified for LTE-splitSRB1.
  • the LTE-splitSRB1 since the LTE-splitSRB1 may be treated like the SRB1, a separate configuration may not be performed.
  • the same logical channel identification information as SRB1 may be included, but the terminal may include information for identifying an entity for LTE-split SRB1.
  • it may include logical channel identification information different from SRB1, but may include the same logical channel configuration information as SRB1.
  • the LTE base station 600 is for designating the path of the RRC signaling message in the PDCP entity to the LTE base station 600 and the NR base station 650 (or the LTE base station 600 and the NR base station 650 and two base stations). Information can be instructed to the terminal.
  • the present disclosure may provide radio resource control signaling for LTE-NR dual connectivity ratio operation supporting tight interworking between LTE and NR.
  • it provides an effect of performing an effective radio connection failure processing in the signaling process between the LTE base station, NR base station and the terminal.
  • FIG. 7 is a diagram for describing a terminal configuration, according to an exemplary embodiment.
  • the terminal 700 constituting the dual connectivity includes configuring a radio resource for a secondary base station or a secondary cell group through a control unit 710 and a secondary base station SRB configured by adding a secondary base station signaling radio bearer (SRB).
  • RRC Radio Resource Control
  • the controller 710 may configure the terminal by adding the secondary base station SRB.
  • the secondary base station means an NR base station.
  • the master base station and the secondary base station may be different base stations using different radio access technologies (Radio Access Technology).
  • the master base station may be the aforementioned eNB and the secondary base station may be a gNB.
  • the secondary base station SRB addition may be determined by the secondary base station. That is, the secondary base station may determine whether to add the secondary base station SRB to the terminal.
  • controller 710 may configure the secondary base station SRB when the master base station performs the secondary base station addition procedure.
  • the controller 710 configures the secondary base station radio resource using the secondary base station SRB necessary to perform the above-described embodiments, and controls the overall operation of the terminal 700 according to whether the radio resource configuration is successful.
  • the receiver 730 may receive radio resource configuration information for the secondary base station through the secondary base station SRB additionally configured.
  • the receiving unit 730 may receive radio resource configuration information for the secondary cell group through the secondary base station SRB. Radio resource configuration information for the secondary base station or the secondary cell group may be received in an RRC message.
  • the secondary cell group means one or more cells associated with the secondary base station, and one or more cells associated with the master base station may be described as a master cell group. That is, when the terminal configures dual connectivity, one cell of each base station may be used, or a plurality of cells controlled by each base station may be used.
  • the controller 710 may apply the secondary base station or the secondary cell group to the terminal by using the received radio resource configuration information.
  • dual connectivity may not be configured using the received radio resource configuration information.
  • the transmitter 720 may transmit a failure information message to the master base station to notify the failure of the dual connectivity configuration of the terminal.
  • the controller 710 may suspend the radio resources for the secondary base station or the secondary cell group when the secondary base station radio resource configuration fails because the radio resource configuration information included in the RRC message is not complied with.
  • the radio resource for the secondary base station or secondary cell group that is the target of the suspend may include the secondary cell group Data Radio Bearer (DRB), the secondary cell group SRB, the secondary cell group portion of the split DRB, and the split. It may be at least one of the secondary cell group portions of the SRB.
  • DRB secondary cell group Data Radio Bearer
  • the failure information message transmitted to the master base station may include cause information on the failure of the secondary base station radio resource configuration.
  • the secondary base station can receive and confirm the information on the failure of the secondary base station radio resource configuration from the master base station.
  • the transmission unit 720 may transmit the information on the success of the radio resource configuration to the secondary base station through the secondary base station SRB.
  • the receiver 730 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • the transmitter 7200 transmits uplink control information, data, and a message to a base station through a corresponding channel.
  • FIG. 8 is a diagram illustrating a configuration of a base station according to an embodiment.
  • the secondary base station 800 controlling the dual connectivity of the terminal includes a control unit 810 for determining the addition of the secondary base station signaling radio bearer (SRB) to the terminal and the secondary base station or the secondary cell group through the secondary base station SRB.
  • Response unit 820 for transmitting a radio resource control (RRC) message including radio resource configuration information to the terminal and when the terminal succeeds in applying radio resources to the secondary base station (comply), the response to the radio resource configuration from the terminal It may include a receiving unit 830 for receiving a message through the secondary base station SRB.
  • the terminal may configure dual connectivity using the master base station and the secondary base station.
  • the secondary base station means an NR base station.
  • the secondary base station SRB addition may be determined by the secondary base station. That is, the controller 810 may determine whether to add the secondary base station SRB to the terminal.
  • the terminal may add the secondary base station SRB when the master base station performs the secondary base station addition procedure.
  • the master base station and the secondary base station may be a base station using different radio access technologies (Radio Access Technology), the master base station may be the aforementioned eNB and the secondary base station may be a gNB.
  • the transmitter 820 may transmit radio resource configuration information about the secondary base station to the terminal through the secondary base station SRB.
  • the transmitter 820 may transmit radio resource configuration information for the secondary cell group through the secondary base station SRB. Radio resource configuration information for the secondary base station or the secondary cell group may be included in the RRC message and transmitted.
  • the secondary cell group means one or more cells associated with the secondary base station, and one or more cells associated with the master base station may be described as a master cell group. That is, when the terminal configures dual connectivity, one cell of each base station may be used, or a plurality of cells controlled by each base station may be used.
  • the terminal may not be able to configure dual connectivity using the received radio resource configuration information.
  • the terminal may notify the failure of the dual connectivity configuration of the terminal by transmitting a failure information message to the master base station.
  • the failure information message transmitted to the master base station may include cause information on the failure of the secondary base station radio resource configuration.
  • the receiver 830 may receive and confirm information on failure of configuring a secondary base station radio resource from the master base station.
  • the radio resource for the secondary base station or the secondary cell group may be suspended.
  • the radio resource for the secondary base station or secondary cell group that is the target of the suspend may include the secondary cell group Data Radio Bearer (DRB), the secondary cell group SRB, the secondary cell group portion of the split DRB, and the split. It may be at least one of the secondary cell group portions of the SRB.
  • DRB secondary cell group Data Radio Bearer
  • the terminal may configure dual connectivity using a plurality of base stations using different radio access technologies.
  • the controller 810 configures a secondary base station radio resource using the secondary base station SRB necessary for performing the above-described embodiments in the terminal, and tight interworking between LTE and NR according to whether the terminal is successfully configured for radio resource. Controls the overall operation of the base station 800 according to providing radio resource control signaling for the LTE-NR dual connectivity ratio operation to support the.
  • the transmitter 820 and the receiver 830 are used to transmit and receive signals, messages, and data necessary for performing the above-described embodiments with the terminal and the master base station.

Landscapes

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

Abstract

La présente invention concerne un procédé et un appareil de configuration d'une double connectivité par un terminal. Plus particulièrement, l'invention concerne un procédé spécifique de configuration d'une connectivité multiple par un terminal au moyen d'une pluralité de stations de base utilisant différents réseaux d'accès radio (par exemple, différentes technologies d'accès radio), et un appareil associé. Un mode de réalisation concerne un procédé et un appareil de configuration d'une double connectivité par un terminal. Le procédé comprend les étapes consistant à : exécuter une configuration en ajoutant un support radio de signalisation (SRB) de station de base secondaire; recevoir un message de gestion des ressources radio (RRC) contenant des informations de configuration de ressources radio associées à une station de base secondaire ou à un groupe de cellules secondaires via le SRB de station de base secondaire; et transmettre un message d'informations de défaillance à une station de base maîtresse lorsqu'il n'est pas possible de satisfaire les informations de configuration de ressource radio incluses dans le message RRC.
PCT/KR2017/004873 2016-05-12 2017-05-11 Procédé de configuration de double connectivité par un terminal, et appareil associé Ceased WO2017196095A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201780029131.4A CN109076383B (zh) 2016-05-12 2017-05-11 用于由终端配置双连接的方法及其装置
US16/300,557 US10721118B2 (en) 2016-05-12 2017-05-11 Method for configuring dual-connectivity by terminal, and apparatus therefor

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR10-2016-0058157 2016-05-12
KR20160058157 2016-05-12
KR10-2016-0083270 2016-07-01
KR20160083270 2016-07-01
KR10-2017-0057549 2017-05-08
KR1020170057549A KR102183826B1 (ko) 2016-05-12 2017-05-08 단말의 듀얼 커넥티비티 구성 방법 및 그 장치

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CN110022588A (zh) * 2018-01-09 2019-07-16 电信科学技术研究院 一种SCG Failure的处理方法及设备
WO2020197306A1 (fr) * 2019-03-28 2020-10-01 Lg Electronics Inc. Activation d'une configuration de groupe de cellules secondaires lors d'une détection de défaillance de groupe de cellules maîtresses
WO2020243976A1 (fr) * 2019-06-07 2020-12-10 Qualcomm Incorporated Procédé et appareil pour un procédé destinés à améliorer l'expérience d'utilisateur pour des dispositifs à double connectivité
CN113424617A (zh) * 2019-02-14 2021-09-21 株式会社Ntt都科摩 用户装置以及基站装置
CN113439465A (zh) * 2019-02-14 2021-09-24 株式会社Ntt都科摩 用户装置以及基站装置
CN113543368A (zh) * 2020-04-14 2021-10-22 中国移动通信有限公司研究院 网络连接的控制方法、装置、相关设备及存储介质
US11297480B2 (en) 2019-10-31 2022-04-05 Samsung Electronics Co., Ltd. Method for performing emergency call and electronic device therefor
CN115039446A (zh) * 2020-02-05 2022-09-09 三星电子株式会社 下一代移动通信系统中的设备和终端操作
US20220322475A1 (en) * 2017-06-15 2022-10-06 Sharp Kabushiki Kaisha Base station apparatus, and method

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KR20140120806A (ko) * 2013-04-04 2014-10-14 주식회사 케이티 Small cell에서 RLF(Radio Link Failure)를 detection 하는 방법 및 장치
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US20220322475A1 (en) * 2017-06-15 2022-10-06 Sharp Kabushiki Kaisha Base station apparatus, and method
CN109963315A (zh) * 2017-12-25 2019-07-02 中国移动通信集团公司 一种辅基站分配方法及装置
CN109963315B (zh) * 2017-12-25 2020-08-04 中国移动通信集团公司 一种辅基站分配方法及装置
CN110022588B (zh) * 2018-01-09 2020-12-08 电信科学技术研究院 一种SCG Failure的处理方法及设备
CN110022588A (zh) * 2018-01-09 2019-07-16 电信科学技术研究院 一种SCG Failure的处理方法及设备
CN113424617A (zh) * 2019-02-14 2021-09-21 株式会社Ntt都科摩 用户装置以及基站装置
CN113439465A (zh) * 2019-02-14 2021-09-24 株式会社Ntt都科摩 用户装置以及基站装置
WO2020197306A1 (fr) * 2019-03-28 2020-10-01 Lg Electronics Inc. Activation d'une configuration de groupe de cellules secondaires lors d'une détection de défaillance de groupe de cellules maîtresses
US12003983B2 (en) 2019-03-28 2024-06-04 Lg Electronics Inc. Activation of secondary cell group configuration upon master cell group failure detection
WO2020243976A1 (fr) * 2019-06-07 2020-12-10 Qualcomm Incorporated Procédé et appareil pour un procédé destinés à améliorer l'expérience d'utilisateur pour des dispositifs à double connectivité
US11297480B2 (en) 2019-10-31 2022-04-05 Samsung Electronics Co., Ltd. Method for performing emergency call and electronic device therefor
CN115039446A (zh) * 2020-02-05 2022-09-09 三星电子株式会社 下一代移动通信系统中的设备和终端操作
US12356271B2 (en) 2020-02-05 2025-07-08 Samsung Electronics Co., Ltd. Device and terminal operation in next generation mobile communication system
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CN113543368B (zh) * 2020-04-14 2024-05-14 中国移动通信有限公司研究院 网络连接的控制方法、装置、相关设备及存储介质

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