WO2016076634A2 - Procédé et dispositif d'émission/réception de données à l'aide d'un opérateur wlan - Google Patents

Procédé et dispositif d'émission/réception de données à l'aide d'un opérateur wlan Download PDF

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Publication number
WO2016076634A2
WO2016076634A2 PCT/KR2015/012139 KR2015012139W WO2016076634A2 WO 2016076634 A2 WO2016076634 A2 WO 2016076634A2 KR 2015012139 W KR2015012139 W KR 2015012139W WO 2016076634 A2 WO2016076634 A2 WO 2016076634A2
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WIPO (PCT)
Prior art keywords
wlan
terminal
information
base station
carrier
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PCT/KR2015/012139
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English (en)
Korean (ko)
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WO2016076634A3 (fr
Inventor
홍성표
최우진
Original Assignee
주식회사 케이티
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Priority claimed from KR1020150155504A external-priority patent/KR101905941B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to US15/525,709 priority Critical patent/US10911942B2/en
Priority to CN201580053460.3A priority patent/CN107079449B/zh
Publication of WO2016076634A2 publication Critical patent/WO2016076634A2/fr
Publication of WO2016076634A3 publication Critical patent/WO2016076634A3/fr

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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
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to a technique for transmitting and receiving user plane data by adding a WLAN carrier to an E-UTRAN carrier at a Radio Access Network (RAN) level.
  • the present invention relates to a method and apparatus capable of minimizing service interruption when transmitting or receiving specific user plane data between a base station and a terminal through a WLAN carrier.
  • RAN Radio Access Network
  • LTE Long Term Evolution
  • LTE-Advanced of the current 3GPP series are high-speed and large-capacity communication systems that can transmit and receive various data such as video and wireless data beyond voice-oriented services.
  • the development of technology capable of transferring large amounts of data is required.
  • As a method for transmitting a large amount of data data can be efficiently transmitted using a plurality of cells.
  • the unlicensed frequency band that can not be used exclusively by a specific operator or a specific communication system can be shared by multiple operators or communication systems.
  • WLAN technology represented by Wi-Fi provides data transmission / reception services using frequency resources of the unlicensed band.
  • the mobile communication system also requires a study on the technology for transmitting and receiving data with the terminal using a corresponding Wi-Fi access point (AP).
  • AP Wi-Fi access point
  • the present invention devised in this background is to provide a specific method and apparatus of WLAN carrier addition configuration for transmitting and receiving data belonging to a specific bearer using a WLAN carrier.
  • the present invention is to provide a specific method and apparatus that can determine whether the base station is connected to the terminal and the WLAN terminal in order to minimize service interruption due to the additional configuration or activation of the WLAN carrier.
  • the present invention provides a method for transmitting / receiving data by a base station, the method comprising additionally configuring a WLAN carrier in a terminal to determine transmission and reception of data and additional configuration indication information for additional configuration of a WLAN carrier to the terminal.
  • the method includes transmitting and receiving confirmation information on WLAN association of a terminal from a WLAN terminal, wherein the WLAN terminal provides a method of confirming whether the terminal is connected to the WLAN using terminal identification information of the terminal.
  • the present invention also provides a method for transmitting and receiving data by a terminal, the method comprising: receiving additional configuration indication information for additional configuration of a WLAN carrier from a base station, additionally configuring a WLAN carrier based on the additional configuration indication information, and terminal identification; Attempting WLAN association using the WLAN carrier using the information, but the WLAN terminal provides a method for transmitting confirmation information about the WLAN association of the terminal to the base station.
  • the present invention provides a base station for transmitting and receiving data, the WLAN of the transmitter and the terminal for transmitting additional configuration indication information for the additional configuration of the WLAN carrier to the control unit and the terminal to determine to send and receive data by additionally configuring the WLAN carrier in the terminal Including a receiving unit for receiving confirmation information for association from the WLAN terminal, the WLAN terminal provides a base station apparatus for checking whether the terminal is connected to the WLAN using the terminal identification information of the terminal.
  • the WLAN carrier is further configured on the basis of a receiver for receiving additional configuration indication information for additional configuration of the WLAN carrier from the base station and the additional configuration indication information, and uses the terminal identification information.
  • the controller includes a control unit for attempting WLAN association through a WLAN carrier, and the WLAN terminal provides a terminal device for transmitting confirmation information on WLAN association of the terminal to the base station.
  • using the WLAN carrier provides an effect of minimizing service interruption in transmitting and receiving data belonging to a specific bearer.
  • the base station can check the information on the association of the terminal and the WLAN end.
  • 1 is a diagram illustrating an example of a structure for WLAN access based on the conventional S2 interface.
  • FIG. 2 is a diagram illustrating an example of a data transmission path using an E-UTRAN carrier and a WLAN carrier.
  • FIG. 3 is a diagram illustrating another example of a data transmission path using an E-UTRAN carrier and a WLAN carrier.
  • FIG. 4 is a diagram illustrating another example of a data transmission path using an E-UTRAN carrier and a WLAN carrier.
  • FIG. 5 is a diagram illustrating another example of a data transmission path using an E-UTRAN carrier and a WLAN carrier.
  • FIG. 6 is a diagram illustrating an additional configuration procedure of a WLAN carrier according to an embodiment of the present invention.
  • FIG. 7 is a diagram exemplarily illustrating a Non-3GPP access authentication procedure.
  • FIG. 8 is a view for explaining the operation of the base station according to an embodiment of the present invention.
  • FIG. 9 is a view for explaining the operation of the terminal according to another embodiment of the present invention.
  • FIG. 10 is a diagram illustrating an additional configuration procedure of a WLAN carrier according to another embodiment of the present invention.
  • FIG. 11 is a diagram illustrating an example of a user plane structure according to the present invention.
  • FIG. 12 illustrates another example of a user plane structure according to the present invention.
  • FIG. 13 is a view showing another example of a user plane structure according to the present invention.
  • FIG. 14 is a diagram illustrating a configuration of a base station according to another embodiment of the present invention.
  • 15 is a diagram illustrating a terminal configuration according to another embodiment of the present invention.
  • 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 an enhanced coverage compared to the existing LTE coverage, or UE category / type defined in the existing 3GPP Release 12 or less that supports low power consumption, or newly defined Release-13 low cost (or 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, 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, 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
  • the WLAN carrier refers to a radio resource of a WLAN, and means a WLAN radio link, a WLAN radio, a WLAN radio resource, or a WLAN radio network.
  • the WLAN radio link, WLAN radio, WLAN radio resource or WLAN radio network will be described as a WLAN carrier for convenience of understanding.
  • the WLAN termination herein refers to a logical WLAN network node. For example, it may be a WLAN AP or a WLAN AC.
  • the WLAN termination may be a WLAN network node, such as an existing WLAN AP or an existing WLAN AC, or may be a WLAN network node with additional functionality for WLAN merge transmission to an existing WLAN AP or an existing WLAN AC.
  • the WLAN termination may be implemented as an independent entity or as a functional entity included in another entity.
  • the WLAN network node will be described as WLAN end point or WLAN AP as necessary.
  • the carrier provided by the base station eNB will be described as an E-UTRAN carrier as necessary.
  • 3GPP / WLAN interworking technology provides RAN assisted WLAN interworking functionality.
  • the E-UTRAN may help terminal-based two-way traffic steering between the E-UTRAN and the WLAN for terminals in the RRC_IDLE and RRC_CONNECTED states.
  • the E-UTRAN provides the assistance parameter to the terminal through broadcast signaling or dedicated RRC signaling.
  • the RAN help parameters include at least one of an E-UTRAN signal strength threshold, a WLAN channel utilization threshold, a WLAN backhaul data rate threshold, a WLAN signal strength (or WLAN signal strength threshold, eg BeaconRSSI threshold) and an offload preference indicator. It may include one.
  • the E-UTRAN may provide a list of WLAN identifiers to the terminal through broadcast signaling.
  • the terminal selects an access network selection and traffic control rule defined in TS 36.304.
  • RAN assistance parameters may be used to evaluate the traffic steering rules or ANDSF policies defined in the TS 24.312 document. If the terminal is provisioned with ANDSF policies, the terminal should forward the received RAN assistance parameters to higher layers. Otherwise, the terminal shall use them in the access network selection and traffic steering rules defined in document TS 36.304.
  • the access network selection and traffic steering rules defined in the TS 36.304 document only apply to WLANs of WLAN identifiers provided by the E-UTRAN.
  • the terminal may indicate it to a higher layer.
  • the terminal applies the access network selection and traffic control rules, the terminal performs traffic control in APN granularity between the E-UTRAN and the WLAN.
  • the RAN assisted WLAN interworking function provides only a method in which the E-UTRAN and the WLAN are built and stand alone.
  • the Rel-12 RAN assisted WLAN interworking function provides a method of interworking on a terminal basis through an RAN rule provided by E-UTRAN since E-UTRAN and WLAN are built standalone. If the terminal is provisioned with ANDSF policies, the terminal forwards the received RAN assistance parameters to the higher layer Non Access Stratum (NAS) and the NAS sends the APN according to the NAS standard specified in the TS 23.402 document. Traffic control could be performed in units. Otherwise, when the access network selection and traffic control rules defined in the TS 36.304 document, which is an idle terminal procedure standard, are satisfied (fulfilled), the terminal forwards it to a higher layer (Non Access Stratum).
  • NAS Non Access Stratum
  • FIG. 1 is a diagram illustrating an example of a structure for WLAN access based on the conventional S2 interface.
  • FIG. 1 is a diagram for architecture for Trusted WLAN access to EPC specified in the conventional TS23.402 document, and illustrates a structure for WLAN connection based on S2 interface.
  • the E-UTRAN in transmitting UE user plane data, the E-UTRAN adds a WLAN carrier as one carrier in the E-UTRAN at the RAN level in consideration of the radio state and mobility of the UE, and thus the E-UTRAN carrier and / or WLAN.
  • the carrier could not be configured to be used simultaneously.
  • the E-UTRAN transmits a WLAN carrier to the UE at the RAN level in consideration of the radio state and mobility of the UE while maintaining the E-UTRAN carrier. Configured to add like one carrier and could not transmit over E-UTRAN carrier and / or WLAN carrier.
  • the E-UTRAN in order for the E-UTRAN to add WLAN carriers as one carrier in the E-UTRAN at the RAN level to transmit user plane data belonging to a particular bearer via the E-UTRAN carrier and / or WLAN carrier, the E-UTRAN A method of splitting (or splitting or routing) / merge user plane data units on layer 2 and transmitting them through the E-UTRAN carrier and the WLAN AP may be considered.
  • a method of transmitting the user plane data unit through the WLAN AP in association with the WLAN AP on the E-UTRAN layer 2 may be considered.
  • data to be transmitted through the E-UTRAN carrier and data to be transmitted through the WLAN carrier may be separated and transmitted from the PDCP higher entity, and the peered PDCP higher entity may receive (or merge) the same.
  • the PDCP higher entity may interwork and transmit data to be transmitted through the WLAN carrier and receive it at the peered higher PDCP entity.
  • data to be transmitted through the E-UTRAN carrier and data to be transmitted through the WLAN carrier may be separated and transmitted from the PDCP entity, and received (or merged) by the peered PDCP entity.
  • the PDCP entity may interwork and transmit data to be transmitted through the WLAN carrier, and the peered PDCP entity may receive it.
  • the RLC entity may separate data to be transmitted through the E-UTRAN carrier and data to be transmitted through the WLAN carrier.
  • the peered RLC entity may receive (or merge) the peer.
  • the RLC entity may interwork with the data to be transmitted through the WLAN carrier and receive it at the peered RLC entity.
  • the access procedure (or authentication, association procedure) between the terminal and the WLAN AP, which is necessary for the base station to effectively configure data communication with the terminal through the WLAN, and the method of configuring a user plane protocol stack between the terminal, the WLAN AP, and the base station, and a control plane procedure therefor;
  • a specific method for transmitting data through a WLAN carrier by checking the success (or accessibility) of a terminal and a WLAN AP with respect to a terminal and a WLAN AP such as a method of triggering data transmission through a WLAN AP No methods were provided.
  • the present invention devised to solve this problem is configured so that the base station adds the WLAN carrier to the terminal at the RAN level as one carrier in the E-UTRAN, and effectively transmits user plane data through the E-UTRAN carrier and / or WLAN carrier. It is an object of the present invention to provide a method and apparatus for configuring transmission.
  • the present invention may be provided in a scenario in which a base station (eNodeB) and a WLAN termination are non-co-located.
  • the base station and the WLAN termination may be established through non-ideal backhaul or near-ideal backhaul or ideal backhaul.
  • the present invention may be provided in a scenario in which a base station (eNodeB) and a WLAN end point are co-located.
  • a protocol structure for this and operation of each layer are provided. Should be. Adding the WLAN carrier as one carrier by the E-UTRAN may conceptually mean that the terminal and the base station add and configure a function for the WLAN carrier in addition to the existing E-UTRAN cell.
  • the E-UTRAN adds a WLAN carrier to a terminal at the RAN level as one carrier in the E-UTRAN to transmit user plane data on a radio bearer basis through the E-UTRAN carrier and / or WLAN carrier.
  • a user plane data unit may be split or routed on a sublayer of UTRAN layer 2 or may be transmitted in association with a WLAN AP.
  • the PDCP entity may separate and transmit data to be transmitted through the E-UTRAN carrier and data to be transmitted through the WLAN carrier, and receive (or merge) the peered PDCP entity.
  • the PDCP entity may interwork and transmit data to be transmitted through the WLAN carrier, and may receive it from the peered PDCP entity.
  • the RLC entity may separate and transmit data to be transmitted through the E-UTRAN carrier and data to be transmitted through the WLAN carrier, and receive (or merge) the peered RLC entity.
  • the RLC entity may interwork with the data to be transmitted through the WLAN carrier and receive it at the peered RLC entity.
  • a method for an E-UTRAN to transmit user plane data belonging to a specific bearer (s) over an E-UTRAN carrier and / or a WLAN carrier by adding a WLAN carrier as one carrier in the E-UTRAN at the RAN level may be considered in which the base station splits (or splits or routes) / merges or merges user plane data units belonging to specific bearer (s) delivered through a core network with a WLAN AP.
  • the base station separates and transmits user plane data (IP packet) belonging to specific bearer (s) transmitted through the core network into data to be transmitted through the E-UTRAN carrier and / or data to be transmitted through the WLAN carrier,
  • the terminal may be configured to receive (or merge).
  • the base station separates and transmits user plane data (IP packet) belonging to specific bearer (s) transmitted through the core network into data to be transmitted through the E-UTRAN carrier and / or data to be transmitted through the WLAN carrier, and the terminal transmits it. Can be controlled to receive (or merge).
  • the base station may allow the user equipment to receive user plane data (IP packet) belonging to specific bearer (s) delivered through the core network in conjunction with the WLAN AP. Control data using a GTP tunnel through a GTP-based interface between two nodes on an LTE network (between eNB and MME or between eNB and SGW (Serving Gateway) or between MME and SGW or between SGW and Packet data network GateWay (PGW)). And user data.
  • IP packet user plane data
  • PGW Packet data network GateWay
  • the base station may know which radio bearer of which terminal to transmit the data to via the tunnel endpoint identifier (TEID) of the S1 GTP tunnel on the GTP header. Therefore, the base station can classify and transmit the same through the WLAN.
  • TEID tunnel endpoint identifier
  • an E-UTRAN transmits and receives user plane data in units of radio bearers through an E-UTRAN carrier and / or a WLAN carrier by adding a WLAN carrier to one terminal in the E-UTRAN at the RAN level. It will be described with reference to. That is, when the user data is transmitted by separating or interworking data to be transmitted through the E-UTRAN carrier and / or data to be transmitted through the WLAN carrier in the PDCP layer, the uplink and downlink data transmission path scenarios will be described.
  • separating or interworking in the PDCP layer but separating or interworking in a layer other than the PDCP (for example, a PDCP upper layer or an RLC layer or a layer included in a PDCP lower layer and an RLC upper layer). Interworking can be similarly applied only as the subject of the entity is changed from PDCP to another layer (eg RLC or PDCP higher layer). Therefore, a method of separating or interworking in an E-UTRAN layer other than PDCP is also included in the scope of the present invention.
  • FIG. 2 is a diagram illustrating an example of a data transmission path using an E-UTRAN carrier and a WLAN carrier.
  • the base station 200 may transmit and receive uplink and downlink data to the terminal 220 through an E-UTRAN carrier.
  • the WLAN AP 210 may also transmit and receive both uplink and downlink data to the terminal 120 using the WLAN carrier.
  • both the E-UTRAN carrier and the WLAN carrier can process uplink and downlink data.
  • FIG. 3 is a diagram illustrating another example of a data transmission path using an E-UTRAN carrier and a WLAN carrier.
  • the base station 200 may transmit and receive uplink and downlink data to the terminal 220 through an E-UTRAN carrier.
  • the WLAN AP 210 may transmit only downlink data to the terminal 120 using the WLAN carrier. That is, although the E-UTRAN carrier and the WLAN carrier may be used simultaneously for the downlink, only the E-UTRAN carrier may be used for the uplink.
  • FIG. 4 is a diagram illustrating another example of a data transmission path using an E-UTRAN carrier and a WLAN carrier.
  • both uplink and downlink data may be processed using a WLAN carrier. That is, the base station 200 and the WLAN AP 210 may transmit and receive downlink and uplink data to the terminal 220 using the WLAN carrier.
  • FIG. 5 is a diagram illustrating another example of a data transmission path using an E-UTRAN carrier and a WLAN carrier.
  • the base station 200 may receive uplink data from the terminal 220 using the E-UTRAN carrier.
  • downlink data may be transmitted using a WLAN carrier via the WLAN AP 210. That is, the E-UTRAN carrier may handle uplink transmission, and the WLAN carrier may handle downlink transmission, respectively.
  • the base station 200 via the WLAN AP 210 to the terminal 220 for the downlink, the terminal 220 via the WLAN AP 210 for the uplink.
  • User data can be transferred by.
  • the base station 200 may transmit user data to the terminal 220 through the WLAN AP 210 for the downlink.
  • FIG. 6 is a diagram illustrating an additional configuration procedure of a WLAN carrier according to an embodiment of the present invention.
  • the E-UTRAN adds a WLAN carrier to a terminal at the RAN level as one carrier in the E-UTRAN to transmit and receive user plane data on a radio bearer basis through the E-UTRAN carrier and / or WLAN carrier, or
  • An exemplary procedure for configuring a radio resource of a WLAN AP is illustrated.
  • the procedure of FIG. 6 may be used for modification of a WLAN carrier, modification of WLAN related radio bearer configuration information, modification of a WLAN connection through a WLAN carrier, modification of data communication information through a WLAN, and setting of terminal parameter information in a WLAN AP.
  • the base station 200 sends a request message for addition / modification to the WLAN AP 210 in order to add / modify transmission through the WLAN carrier for a specific E-RAB (S610).
  • the request message for the addition / modification may include information for data transmission of the E-RAB.
  • the information for data transmission of the E-RAB includes the TNL (Transport Network Layer) address information or IP address information of the base station for uplink data transmission to be transmitted from the terminal 220 to the WLAN AP 210 and the GTP tunnel end. It may include point information.
  • the GTP tunnel may be configured in an E-RAB (or radio bearer) unit.
  • the GTP tunnel may be configured in terminal units. That is, E-RABs processed through the WLAN carrier among the E-RABs belonging to one terminal may be linked / mapped to the corresponding tunnel.
  • the information for data transmission of the E-RAB is transport network layer (TNL) address information or IP address information of the base station 200 for uplink data transmission to be transmitted from the terminal 220 through the WLAN AP 210.
  • GTP tunnel endpoint information may include transport network layer (TNL) address information or IP address information of the WLAN AP 210 for downlink data transmission from the base station 200 to be transmitted through the WLAN AP 210. It may include GTP tunnel endpoint information.
  • the GTP tunnels may be configured in E-RAB (or radio bearer) units. Alternatively, the GTP tunnels may be configured in terminal units. That is, E-RABs processed through the WLAN carrier among the E-RABs belonging to one terminal may be linked / mapped to the corresponding tunnel.
  • the WLAN AP 210 sends a response / confirmation message to the base station 200 (S620).
  • the aforementioned response / confirmation message may include information for data transmission of the aforementioned E-RAB.
  • the response / acknowledgment message is a GTP tunnel end and transport network layer (TNL) address information or IP address information of the WLAN AP 210 for downlink data transmission from the base station 200 to be transmitted through the WLAN AP 210. It may include point information.
  • the GTP tunnel may be configured in E-RAB (or radio bearer) units.
  • the GTP tunnel may be configured in units of terminals. That is, E-RABs processed through the WLAN carrier among the E-RABs belonging to one terminal may be linked / mapped to the corresponding tunnel.
  • the response / acknowledge message may be transport network layer (TNL) address information or IP address information of the base station 200 of the base station 200 for transmitting uplink data to be transmitted through the WLAN AP 210 in the terminal 220.
  • GTP tunnel endpoint information may be transport network layer (TNL) address information or IP address information and GTP tunnel endpoint information of the WLAN AP 210 for downlink data transmission from the base station 200 to be transmitted through the WLAN AP 210.
  • the GTP tunnels may be configured in E-RAB (or radio bearer) units.
  • the GTP tunnels may be configured in terminal units. That is, E-RABs processed through the WLAN carrier among the E-RABs belonging to one terminal may be linked / mapped to the corresponding tunnel.
  • the base station 200 sends an RRC Connection Reconfiguration message including additional configuration indication information for additional configuration of the WLAN carrier to the terminal 220 (S630).
  • the additional configuration indication information for the WLAN additional configuration described above may include information indicating WLAN access / authentication / association.
  • the supplementary configuration indication information for WLAN additional configuration may include at least one of WLAN identifier (SSID, BSSID, HESSID) information, WLAN channel information, and bearer configuration information via WLAN.
  • SSID WLAN identifier
  • BSSID BSSID
  • HESSID HESSID
  • the terminal 220 applies the new configuration to the terminal based on the additional configuration indication information, and transmits an RRC Connection Reconfiguration Complete message to the base station 200 (S640).
  • the terminal 220 When the terminal 220 cannot comply with some or all of the configuration according to the additional configuration indication information included in the RRC Connection Reconfiguration message, the terminal 220 performs a reconfiguration failure procedure. That is, the terminal 220 may perform the RRC reestablishment procedure.
  • the terminal 220 may transmit an RRC message including information or cause information indicating failure of a WLAN configuration (part of the WLAN configuration) to the base station 200.
  • the RRC message including information or cause information indicating the WLAN configuration failure described above may be an RRC Connection Reconfiguration Complete message.
  • the RRC message including the information or cause information indicating the WLAN configuration failure described above may be a UE Failure Indication message.
  • the terminal 220 when the base station 200 instructs the terminal 220 by including information indicating WLAN access / authentication / association for a WLAN having specific WLAN identification information, the terminal 220 indicates the terminal 220. If the WLAN is already in the WLAN connection / authentication / association state with the corresponding WLAN, the terminal 220 may send an RRC message including the cause information indicating that the UE is already in the WLAN connection / authentication / association state.
  • the terminal 220 may send an RRC message including the cause information indicating that the WLAN fails to connect / authenticate / associate to the base station 200.
  • the terminal 220 may perform an access to the WLAN AP 210 (S650).
  • the terminal 220 upon receiving the information indicating the WLAN access / authentication / association described above, the terminal 220 performs authentication or association with the WLAN AP 210.
  • the terminal 220 receives the information indicating the aforementioned WLAN access / authentication / association set to “TRUE” or “ON”, the terminal 220 authenticates or associates with the WLAN AP 210. ).
  • the terminal 220 when the terminal 220 is set to receive WLAN authentication or WLAN association, the terminal 220 performs authentication or association with the WLAN AP 210.
  • the additional configuration indication information for the WLAN additional configuration described above does not include information indicating WLAN access / authentication / association or is set to OFF, authentication is performed with the WLAN AP 210. And / or transmit and / or receive data over a WLAN carrier without association.
  • the association described above means a procedure required for the UE to access the WLAN AP and may be used to include both an access or authentication procedure.
  • the association described above may mean an authentication attempt, an access attempt except for an access procedure, and the like.
  • the WLAN connection, authentication and association herein refers to a mutually inclusive relationship or may be used in the same sense.
  • a method in which a terminal attempts to access a WLAN AP to perform authentication and association may be performed using a conventional standard procedure for non-3GPP access specified in 3GPP TS 33.402 document.
  • . 7 illustrates an example of a Non-3GPP access authentication procedure standardized in a TS 33.402 document.
  • access authentication for Non-3GPP access may be based on EAP-AKA (Extensible Authentication Protocol-Authentication and Key Agreement) or EAP-AKA '.
  • the EAP server for EAP-AKA or EAP-AKA ' is performed through a 3GPP Authentication Authorization Accounting (AAA) server present in the Evolved Packet Core (EPC).
  • AAA 3GPP Authentication Authorization Accounting
  • NAI Network Access Identifier
  • the terminal uses an identifier that complies with the Network Access Identifier (NAI) format.
  • NAI includes IMSI in case of first authentication.
  • NAI is standardized in document TS23.003.
  • the NAI may include a pseudonym assigned to the terminal in the previous authentication procedure operation.
  • Psedonym is generated in the form of encrypted IMSI and the method of creation is standardized in the document TS33.234.
  • This method requires additional network entities such as 3GPP AAA and uses IMSI or IMSI based identifiers. Therefore, it may be complicated to operate in WLAN aggregation or WLAN interworking at the RAN level operating based on the terminal and the base station.
  • a method in which a terminal attempts to access a WLAN AP to perform authentication or association may be performed using a WLAN related standard procedure.
  • a WLAN related standard procedure For example, 802.1x or EAP protocols can be used.
  • IP security protocols, algorithms, and key management methods (IPSEC) protocols may be used.
  • 3GPP AAA when using the authentication-related standard protocols described above (EAP-AKA, EAP-SIM, 802.1x, EAP, IPSEC, Radius, etc.), 3GPP AAA may be used as an authentication server or another network entity may be used. have. Alternatively, the WLAN AP may itself operate as an authentication server. Alternatively, the base station may perform the function of the authentication server.
  • the base station In order to minimize service interruption due to configuration or activation of WLAN aggregation at the RAN level (or WLAN interworking at the RAN level or data transmission via the RAN level WLAN), the base station has successfully connected the terminal with the WLAN AP. It is necessary to confirm (or receive or acknowledge) information about the transmittable state or the success of association or the success of authentication.
  • the WLAN AP needs to check information on the WLAN association success of the WLAN aggregation configured terminal at the RAN level from the base station or the terminal. have. Or it is necessary to identify such a terminal.
  • the present invention proposes a specific method and apparatus in which a base station or a WLAN AP checks whether a terminal instructed to configure a WLAN carrier succeeds in accessing / authenticating / associated with a WLAN AP providing the WLAN carrier.
  • the terminal will be described with reference to a procedure for performing association with the WLAN AP and confirming the success thereof.
  • the procedure for checking the success of the association can be applied equally to the case of connection or authentication.
  • the base station or the terminal recognizes a failure / disable state to suspend a data radio bearer (or data transmission through the data) of the base station or the terminal.
  • a procedure for reconfiguring radio resources is performed.
  • the terminal may send an RRC message including cause information indicating that the WLAN fails to connect / authenticate / associate with the base station.
  • the base station receiving the message including the WLAN connection / authentication / association failure cause information may release the WLAN radio resource configuration.
  • the base station recognizes the success / availability state and triggers data transmission.
  • the WLAN AP confirms the success of the association and transmits data of a specific radio bearer transmitted by the terminal through the WLAN AP in association with an uplink tunnel between the corresponding base station and the WLAN AP.
  • Procedures for identifying the present invention may also be used in cases other than those described above.
  • a WLAN AP association attempt and verification procedure will be described with reference to FIGS. 8 and 9, and a WLAN AP will be described as a WLAN termination.
  • FIG. 8 is a view for explaining the operation of the base station according to an embodiment of the present invention.
  • the base station of the present invention further comprises the steps of: determining to transmit and receive data by configuring a WLAN carrier in the terminal, transmitting additional configuration indication information for additional configuration of the WLAN carrier to the terminal, and the WLAN of the terminal. And receiving confirmation information about association from the WLAN end point, wherein the WLAN end point confirms whether the terminal is connected to the WLAN using terminal identification information of the terminal.
  • the base station further includes configuring a WLAN carrier in the terminal and determining to transmit and receive data (S810).
  • the base station may determine whether to perform data transmission / reception by additionally configuring a WLAN carrier in an arbitrary terminal using data traffic information, base station load information, WLAN channel usage information, WLAN load information, and the like. That is, the base station may collect information of the base station, the terminal and the WLAN end to determine whether to further configure a WLAN carrier in any terminal. Alternatively, the base station may receive and determine information on whether to add a WLAN carrier to any terminal from a higher layer.
  • the base station includes the step of transmitting additional configuration indication information for the additional configuration of the WLAN carrier to the terminal (S820).
  • the base station may transmit additional configuration indication information necessary for additional configuration of the WLAN carrier to the terminal.
  • the additional configuration indication information may include information for instructing the terminal to further configure the WLAN carrier.
  • the additional configuration indication information may include at least one of WLAN identification information, WLAN channel information, and configuration information of a bearer to be configured through the WLAN for the terminal to access a specific WLAN end point (WLAN AP).
  • the terminal further configures a radio bearer for transmitting and receiving data using a WLAN carrier by using the received additional configuration indication information.
  • the additional configuration indication information includes the information indicating the connection / authentication / connection to the WLAN terminal providing the WLAN carrier, the terminal uses the additional configuration indication information to the connection / authentication / connection to the WLAN terminal You can try
  • the base station includes receiving confirmation information on the WLAN association of the terminal from the WLAN end (S830). Thereafter, the base station may receive confirmation information from the WLAN end as to whether the corresponding terminal is associated with the WLAN end providing the WLAN carrier. For example, the terminal attempts to associate with the terminal identification information to the WLAN end based on the additional configuration indication information. The WLAN terminal proceeds with the terminal with respect to the WLAN carrier provided by the WLAN terminal using the terminal identification information, and if the association procedure with the terminal is successful, and transmits the confirmation information including the information to the base station. If, when the association between the terminal and the WLAN terminal fails, confirmation information including information on the association failure is transmitted to the base station.
  • the base station can determine whether the terminal instructing additional configuration of the WLAN carrier is ready to transmit and receive data through the WLAN end. Therefore, when data is transmitted or received by separating or interworking through a WLAN carrier, service interruption due to a failure in linkage between the WLAN terminal and the terminal can be minimized.
  • the base station may transmit the terminal identification information to the WLAN end before transmitting additional configuration indication information to the terminal so that the WLAN end can identify the terminal to try to associate.
  • the terminal identification information may include at least one of WLAN MAC address information, IP address information, International Mobile Subscriber Identity (IMSI) related information, and Cell-Radio Network Temporary Identifier (C-RNTI) information of the terminal. .
  • the base station may receive the terminal identification information and the WLAN identification information for the terminal for configuring to add the WLAN carrier from the WLAN end before transmitting the additional configuration indication information.
  • the terminal identification information may include at least one of WLAN MAC address information and IP address information of the terminal allocated by the WLAN terminal. Thereafter, the base station transmits the terminal identification information received from the WLAN terminal to the terminal, and the terminal may attempt to associate with the WLAN terminal using the received terminal identification information.
  • the base station may receive the terminal identification information from the terminal to further configure the WLAN carrier.
  • the terminal identification information may include at least one of WLAN MAC address information and IP address information of the terminal.
  • the base station may receive the terminal identification information received from the terminal, and may share the terminal identification information with the WLAN end.
  • FIG. 9 is a view for explaining the operation of the terminal according to another embodiment of the present invention.
  • a terminal of the present invention includes receiving additional configuration indication information for additional configuration of a WLAN carrier from a base station, additionally configuring a WLAN carrier based on the additional configuration indication information, and terminal identification information. Attempting WLAN association using a WLAN carrier using a WLAN carrier, the WLAN terminal may transmit confirmation information on the WLAN association of the terminal to the base station.
  • the terminal of the present invention includes receiving additional configuration indication information for the additional configuration of the WLAN carrier from the base station (S910).
  • the terminal may receive the additional configuration indication information when the base station determines the additional configuration of the WLAN carrier to the terminal.
  • the additional configuration indication information may include information necessary for the terminal to further configure the WLAN carrier to transmit and receive data.
  • the additional configuration indication information may include information for instructing the terminal to further configure the WLAN carrier.
  • the additional configuration indication information may include at least one of WLAN identification information, WLAN channel information, and configuration information of a bearer to be configured through the WLAN for the terminal to access a specific WLAN end point (WLAN AP).
  • the additional configuration indication information may be included in the RRC connection reconfiguration message.
  • the terminal further includes configuring the WLAN carrier based on the additional configuration indication information (S920).
  • the terminal further configures a radio bearer for transmitting and receiving data using a WLAN carrier by using the received additional configuration indication information.
  • the terminal performs a reconfiguration failure procedure when the configuration of the additional configuration indication information received through higher layer signaling cannot be added. That is, the terminal may perform an RRC reestablishment procedure.
  • the terminal may transmit information indicating cause or cause information to the base station through an RRC message.
  • the terminal includes a step of attempting WLAN association (Association) via the WLAN carrier using the terminal identification information (S930).
  • the terminal attempts WLAN association with the WLAN end point through the WLAN carrier.
  • the terminal may attempt to associate with the WLAN end using the terminal identification information.
  • the terminal identification information may include at least one of WLAN MAC address information, IP address information, International Mobile Subscriber Identity (IMSI) related information, and Cell-Radio Network Temporary Identifier (C-RNTI) information of the terminal.
  • the terminal identification information may be transmitted by the base station to the WLAN terminal so that the WLAN terminal may determine whether the terminal is successfully connected to the WLAN.
  • the terminal may perform a WLAN connection attempt using the terminal identification information included in the additional configuration indication information.
  • the terminal identification information may include at least one of WLAN MAC address information and IP address information of the terminal allocated from the WLAN end.
  • the terminal may attempt to associate with the WLAN using the terminal identification information allocated from the WLAN end point.
  • the terminal may transmit the terminal identification information to the base station.
  • the terminal identification information may include at least one of WLAN MAC address information and IP address information of the terminal.
  • the base station may share the terminal identification information received from the terminal with the WLAN end.
  • the base station and the terminal of the present invention by using the terminal identification information known to the WLAN end to the terminal further configures the WLAN carrier to attempt the association, the WLAN terminal can determine whether the WLAN association success. have.
  • the base station may receive a confirmation whether the WLAN connection success of the terminal from the WLAN end.
  • the base station may use the following methods as methods for confirming information on a WLAN connection success (or transmission possible state or association success and / or authentication success) of a specific terminal.
  • the base station may transmit terminal identification information for a terminal determined to add a WLAN carrier to a WLAN end point (WLAN AP).
  • WLAN AP WLAN end point
  • the base station may allow the WLAN AP to include identification information for identifying the corresponding terminal in a request message for addition / modification to the WLAN AP.
  • the terminal may include terminal identification information for identifying the corresponding terminal.
  • the terminal may include terminal identification information for identifying the terminal in the control plane message after step S650 of FIG. 6.
  • the terminal may include terminal identification information for identifying the terminal in the user plane message after step S650 of FIG. 6.
  • the WLAN AP may check information on the success of the association of the terminal with the WLAN AP through the terminal identification information for identifying the corresponding terminal.
  • the WLAN AP may identify the corresponding terminal and associate it with the tunnel for user plane data transmission. For example, when the WLAN AP confirms the association success, the WLAN AP transmits data of a specific radio bearer (or data of a specific group of radio bearers) transmitted from the terminal through the WLAN AP to an uplink tunnel between the corresponding base station and the WLAN AP. Can be sent in conjunction.
  • the WLAN AP may transmit data of a specific radio bearer (or data of a specific group of radio bearers) transmitted from the base station to the WLAN AP through the tunnel (s) to the corresponding terminal. have.
  • the WLAN AP checks the information on the success of the connection between the terminal and the WLAN AP for the terminal through the terminal identification information for identifying the corresponding terminal as described above It may include the step of delivering to.
  • the WLAN MAC address information of the terminal may be used.
  • the base station may transmit the WLAN MAC address information to the WLAN AP to be used by the terminal to access / authenticate / associate with the WLAN provided by the WLAN end point.
  • the WLAN MAC address information may be assigned by the base station, or the core network (eg, MME) may transmit to the base station.
  • the WLAN MAC address information may be received from the terminal.
  • the WLAN AP may check information on the success of the association of the terminal with the WLAN AP through the WLAN MAC address information. May be delivered to the base station.
  • the WLAN AP may identify the terminal and associate it with a tunnel for user plane data transmission.
  • IP address information of the terminal may be used.
  • the base station allocates the IP address information to be used by the terminal, or the base station receives the IP address information of the terminal from the terminal, or the base station is the IP of the terminal from the core network (for example, MME or S-GW or P-GW).
  • the address information can be received and delivered to the WLAN AP.
  • the terminal may include the aforementioned IP address information.
  • the WLAN AP may check information on the successful connection between the terminal of the corresponding terminal and the WLAN AP through the IP address information. In this case, the WLAN AP may transmit the identification information to the base station. Alternatively, the WLAN AP may identify the terminal and associate it with a tunnel for user plane data transmission.
  • an IMSI or an IMSI-based identifier of the terminal may be used.
  • the base station generates an IMSI based identifier of the terminal, or the base station receives an IMSI based identifier of the terminal or an IMSI based on the terminal from the terminal, or the base station from the core network (for example, MME or HSS or 3GPP AAA)
  • An identifier generated based on the IMSI or the IMSI of the terminal may be received and transmitted to the WLAN AP.
  • the terminal may include the aforementioned IMSI or IMSI-based identifier.
  • the WLAN AP may check information on the success of the association of the terminal with the WLAN AP through the IMSI or the IMSI-based identifier. In this case, the WLAN AP may transmit the identification information to the base station.
  • the WLAN AP may identify the terminal and associate it with a tunnel for user plane data transmission.
  • the terminal identification information for identifying the terminal may use the C-RNTI of the terminal assigned by the base station.
  • the base station may deliver the C-RNTI assigned to the terminal to the WLAN AP. Thereafter, the terminal may include the C-RNTI when performing the WLAN AP association.
  • the WLAN AP may check information on the success of the association of the terminal with the WLAN AP through the C-RNTI, and in this case, may transmit the confirmation information to the base station.
  • the WLAN AP may identify the terminal and associate it with a tunnel for user plane data transmission.
  • the WLAN AP may transmit the C-RNTI to the base station and perform authentication at the base station.
  • a WLAN AP (WLAN Termination) Sends Terminal Identification Information
  • the WLAN AP may allocate terminal identification information to be used for access / authentication / association, etc. to the WLAN provided by the WLAN terminal and transmit the terminal identification information to the terminal through the base station.
  • the WLAN AP may include terminal identification information for identifying the corresponding terminal by the WLAN AP to the base station. Thereafter, in step S650 of FIG. 6 in which the terminal performs association (access or authentication) with the WLAN AP, the terminal may perform association including terminal identification information for identifying the corresponding terminal.
  • the WLAN AP may check information on the success of the association of the terminal with the WLAN AP through the terminal identification information for identifying the corresponding terminal. Alternatively, the WLAN AP may identify the corresponding terminal and associate it with the tunnel for user plane data transmission.
  • the terminal transmits data of a specific radio bearer (or data of a specific group of radio bearers) transmitted through the WLAN AP in association with an uplink tunnel between the corresponding base station and the WLAN AP. can do.
  • the base station may transmit data of a specific radio bearer (or data of a specific group of radio bearers) transmitted to the WLAN AP through the tunnel (s) to the corresponding terminal.
  • the WLAN AP checks the information on the success of the connection between the terminal and the WLAN AP for the terminal through the terminal identification information for identifying the corresponding terminal as described above It may include the step of delivering to.
  • the WLAN MAC address information of the terminal may be used.
  • the WLAN AP assigns WLAN MAC address information to be used by the terminal to access / authenticate / associate with a WLAN provided by the WLAN end-point (or receives WLAN MAC address information from the terminal or receives previously received WLAN MAC address information from the terminal).
  • the base station may configure the terminal identification information in the terminal through an RRC connection reconfiguration message.
  • the terminal performs the WLAN AP association operation using the received WLAN MAC address information.
  • the WLAN AP may transmit confirmation information to the base station when confirming the information on the successful connection between the terminal of the corresponding terminal and the WLAN AP through the aforementioned WLAN MAC address information.
  • the WLAN AP may identify the terminal and associate it with a tunnel for user plane data transmission.
  • IP address information of the terminal may be used.
  • the WLAN AP (or any node that manages the WLAN AP or any node that allocates the IP address of the terminal accessing through the WLAN AP) may allocate IP address information to be used by the terminal and transmit it to the base station.
  • the base station may configure the terminal identification information in the terminal through an RRC connection reconfiguration message.
  • the terminal performs WLAN AP association using the received IP address information.
  • the WLAN AP may check information on the success of the association between the terminal of the corresponding terminal and the WLAN AP through the above IP address information, and may transmit the confirmation information to the base station.
  • the WLAN AP may identify the terminal and associate it with a tunnel for user plane data transmission.
  • the WLAN AP may receive IP address information from the terminal or forward it to the base station using the IP address information previously received from the terminal.
  • the base station may transmit terminal identification information to the WLAN AP through the terminal.
  • the WLAN additional configuration procedure and some procedures of FIG. 6 may be changed. Accordingly, the third embodiment will be described with reference to the WLAN additional configuration procedure of FIG. 10 to determine whether the association is successful using the terminal identification information.
  • FIG. 10 is a diagram illustrating an additional configuration procedure of a WLAN carrier according to another embodiment of the present invention.
  • the base station 200 transmits an RRC connection reconfiguration message including additional configuration indication information for additional WLAN configuration to the terminal 220 (S1010).
  • the additional configuration indication information for the WLAN additional configuration described above may include information indicating WLAN access / authentication / association.
  • the additional configuration indication information for additional WLAN configuration may include at least one of WLAN identifier (SSID, BSSID, HESSID) information, WLAN channel information, and bearer configuration information through the WLAN.
  • the terminal 220 applies the new configuration based on the received additional configuration indication information, and transmits an RRC Connection Reconfiguration Complete message to the base station 200 (S1020).
  • the terminal 220 If the terminal 220 cannot comply with all or part of the configuration included in the RRC connection reconfiguration message, the terminal 220 performs a reconfiguration failure procedure. That is, the RRC reestablishment procedure is performed.
  • the terminal 220 may change the WLAN configuration (part of the WLAN configuration) to the RRC connection reconfiguration message. You can return to the state before receiving.
  • the terminal 220 may transmit an RRC message including information or cause information indicating failure of a WLAN configuration (part of the WLAN configuration) to the base station 200.
  • the RRC message including the information or cause information indicating the WLAN configuration failure described above may be an RRC connection reconfiguration complete message.
  • the RRC message including the information or cause information indicating the WLAN configuration failure described above may be a UE Failure Indication message.
  • the terminal 220 may perform connection / authentication / association with the WLAN AP 210 (S1030).
  • the terminal 220 upon receiving the information indicating the WLAN access / authentication / association described above, the terminal 220 performs authentication or association with the WLAN AP 210.
  • the terminal 220 receives the information indicating the aforementioned WLAN access / authentication / association set to “TRUE” or “ON”, the terminal 220 authenticates or associates with the WLAN AP 210. ).
  • the terminal 220 when the terminal 220 is set to receive WLAN authentication or WLAN association, the terminal 220 performs authentication or association with the WLAN AP 210.
  • the additional configuration indication information for the WLAN additional configuration described above does not include information indicating WLAN access / authentication / association or is set to OFF, authentication is performed with the WLAN AP 210. And / or transmit and / or receive data over a WLAN carrier without association.
  • the terminal 220 is in the corresponding message when connecting / authenticating / associated with the WLAN AP 210 or the terminal is in the control plane message transmitted to the WLAN AP 210 after successfully connecting / authenticating / connecting with the WLAN AP 210. It may include terminal identification information for identifying. The terminal identification information may be terminal identification information described in the first embodiment. Alternatively, the terminal 220 is in the message when the connection / authentication / connection to the WLAN AP 210, or in the control plane message transmitted to the WLAN AP 210 after the terminal is successful in connection / authentication / connection to the WLAN AP (210). It may include information for accessing the base station (or data transmission) connected to the terminal.
  • the information included in the control plane message may include one or more of transport network layer (TNL) address information, IP address information, and tunnel endpoint ID.
  • the terminal 220 is in the message when the connection / authentication / connection to the WLAN AP 210, or in the control plane message transmitted to the WLAN AP 210 after the terminal is successful in connection / authentication / connection to the WLAN AP (210).
  • the UE 220 transmits data of a specific radio bearer (or data of a specific group of radio bearers) transmitted through the WLAN AP 210 in association with an uplink tunnel between the corresponding base station 200 and the WLAN AP 210. It may include information of one or more of the uplink tunnel endpoint ID.
  • terminal identification information for identifying the terminal 220 or information for accessing a base station connected to the terminal may be transmitted through an RRC connection reconfiguration message. It may be received by the terminal 220 at 200.
  • the WLAN AP 210 may transmit a control plane message to the base station 200 in order to transmit confirmation information about the successful connection of the terminal 200 and the WLAN AP 210 to the base station 200.
  • the WLAN AP 210 may transmit a control plane message to the base station 200 to establish data transmission through the WLAN AP 210 (S1040).
  • the WLAN AP 210 may transmit the above-described control plane message when the terminal 220 and the WLAN AP 210 check the information on the success of the association.
  • the above-described control plane message may include terminal identification information for identifying the corresponding terminal 220 described above.
  • the control plane message may include at least one of TNL address information, IP address information, and GTP tunnel endpoint information of the WLAN AP 210 for downlink data transmission to be transmitted through the WLAN AP 210.
  • the GTP tunnel may be configured in an E-RAB (or radio bearer) unit.
  • the GTP tunnel may be configured in terminal units. That is, E-RABs processed through the WLAN among the E-RABs belonging to one terminal may be linked / mapped to the corresponding tunnel.
  • the TNL address information, IP address information, GTP tunnel endpoint information of the WLAN AP 210 for downlink data transmission to be transmitted through the WLAN AP 210, and the terminal 220 are transmitted through the WLAN AP 210. It may include TNL address information, IP address information, and GTP tunnel endpoint information of the base station 200 for uplink data transmission to be performed.
  • the GTP tunnel may be configured in an E-RAB (or radio bearer) unit.
  • the GTP tunnel may be configured on a terminal basis. That is, E-RABs processed through the WLAN among the E-RABs belonging to one terminal 220 may be linked / mapped to the corresponding tunnel.
  • the base station 200 may transmit a control plane response message to the WLAN AP 210 for confirmation / response to the above-described control plane message or to set up data transmission through the WLAN AP 210 (S1050). ).
  • the terminal 220 may include TNL address information, IP address information, and GTP tunnel endpoint information of the base station 200 for uplink data transmission from the terminal 220 to the WLAN AP 210.
  • the GTP tunnel may be configured in an E-RAB (or radio bearer) unit.
  • the GTP tunnel may be configured in terminal units. That is, E-RABs processed through the WLAN among the E-RABs belonging to one terminal 220 may be linked / mapped to the corresponding tunnel.
  • step S1050 may be optionally configured. That is, step S1050 may be omitted.
  • a transmission point of data through the WLAN carrier will be described.
  • transmission of user plane data for minimizing service interruption due to WLAN aggregation configuration or activation at the RAN level or for fast offloading to the WLAN is illustrated in FIG. It may occur after the step S620.
  • the transmission of user plane data for minimizing service interruption or offloading to the WLAN due to WLAN aggregation configuration or activation at the RAN level is S640 of FIG. 6. It may occur after the step.
  • the transmission of user plane data for minimizing service interruption due to WLAN merging configuration or activation at the RAN level or offloading to the WLAN is illustrated in FIG. It may occur after the step S650.
  • transmission of user plane data (or data forwarding from the base station to the WLAN AP) may occur after the step of receiving confirmation information from the WLAN end point for WLAN association.
  • FIG. 11 is a diagram illustrating an example of a user plane structure according to the present invention.
  • a user plane data unit (L2 user data, eg, PDCP PDU or RLC PDU) on a sub-layer of E-UTRAN layer 2 may be divided (or split or routing) or interworked with WLAN AP 210. Can be sent.
  • the layer 2 user data transmitted from the base station 200 to the terminal 220 or transmitted from the terminal 220 to the base station 200 may be stored in a specific layer 2 entity of the base station 200 (or the terminal 220). It should be delivered to the layer 2 entity of the terminal 220 (or the base station 200) peered to the specific layer 2 entity. To this end, as shown in FIG.
  • two tunnels connected between the base station 200 and the WLAN AP 210 and between the WLAN AP 210 and the terminal 220 may be configured to transmit data, and each tunnel may be wireless. It may be configured in a bearer unit. That is, the tunnel between the base station 200 and the WLAN AP 210 and the tunnel between the WLAN AP 210 and the terminal 220 are linked (or mapped) in units of radio bearers.
  • IP packet may be transmitted in association with the WLAN AP 210.
  • two tunnels connected between the base station 200 and the WLAN AP 210 and between the WLAN AP 210 and the terminal 220 may be configured to transmit data.
  • the terminal 220 may be configured in units of bearer (s), in units of bearer groups, or in units of terminals.
  • the tunnel between the base station 200 and the WLAN AP 210 is linked (or mapped) in units of a radio bearer, and the tunnel between the WLAN AP 210 and the terminal 220 is a bearer (s) of the terminal 220. It may be configured in units or in bearer groups or in units of terminals.
  • any tunneling protocol can be used for the tunneling layer.
  • any tunneling protocol may use a UDP-based GTP protocol.
  • any tunneling protocol may use the GRE protocol.
  • any tunneling protocol may use an IP in IP tunnel or an IPSEC tunnel.
  • any new tunneling protocol may be used.
  • the same tunneling protocol may be used for the tunneling layer of the tunnel between the base station 200 and the WLAN AP 210 and the tunneling layer of the tunnel between the WLAN AP 210 and the terminal 220.
  • another tunneling protocol may be used for the tunneling layer of the tunnel between the base station 200 and the WLAN AP 210 and the tunneling layer of the tunnel between the WLAN AP 210 and the terminal 220.
  • FIG. 12 illustrates another example of a user plane structure according to the present invention.
  • a user plane data unit when a user plane data unit is separated (or split or routing) or transmitted in connection with a WLAN AP 210 on a sub-layer of the E-UTRAN layer 2, the base station 200 to the terminal 220.
  • the layer 2 user data transmitted or transmitted from the terminal 220 to the base station 200 is transmitted from the specific layer 2 entity of the base station 200 (or the terminal 220) to the terminal 220 peered to the specific layer 2 entity. Or, it should be delivered to the layer 2 entity of the base station 200.
  • a tunnel may be transmitted between the base station 200 and the terminal 220 to transmit data, and the tunnel between the base station 200 and the terminal 220 may be configured in units of radio bearers. .
  • a tunnel may be formed between the base station 200 and the WLAN AP 210 to transmit data.
  • the tunnel between the base station 200 and the WLAN AP 210 includes tunnel protocol data between the base station 200 and the terminal 220.
  • the tunnel between the base station 200 and the WLAN AP 210 may be configured in units of radio bearers. In another method, the tunnel between the base station 200 and the WLAN AP 210 may be configured in a terminal unit.
  • IP packet IP packet
  • the inter-220 tunnel may be configured on a bearer (s) basis of a terminal 220 or on a bearer group basis or on a terminal basis.
  • a tunnel may also be configured between the base station 200 and the WLAN AP 210 to transmit data.
  • the tunnel between the base station 200 and the WLAN AP 210 includes tunnel protocol data between the base station 200 and the terminal 220.
  • the tunnel between the base station 200 and the WLAN AP 210 may be configured in units of radio bearers. In another method, the tunnel between the base station 200 and the WLAN AP 210 may be configured in a terminal unit.
  • FIG. 13 is a view showing another example of a user plane structure according to the present invention.
  • the base station 200 when a user plane data unit is separated or transmitted in connection with a WLAN AP 210 on a sub-layer of the E-UTRAN layer 2, the base station 200 is transmitted from the base station 200 to the terminal 220 or the terminal 220.
  • Layer 2 user data transmitted to the base station 200 from the specific layer 2 entity of the base station 200 (or the terminal 220) is peered to the specific layer 2 entity of the terminal 220 (or the base station 200).
  • the base station 200 (or the terminal 220) includes information for linking (or mapping) the layer 2 user data to the corresponding layer 2 entity, and sends the terminal ( 220 (or the base station 200) may use the information for associating the aforementioned layer 2 entity in the received layer 2 user data and transfer the same to the corresponding layer 2 entity.
  • a tunnel may be formed between the base station 200 and the WLAN AP 210 to transmit data.
  • the tunnel between the base station 200 and the WLAN AP 210 may include the aforementioned Layer 2 user data or IP packet as a payload.
  • the tunnel between the base station 200 and the WLAN AP 210 may be configured in units of radio bearers. In another method, the tunnel between the base station 200 and the WLAN AP 210 may be configured in a terminal unit.
  • the structure shown in FIG. 13 may be used. Since data may be transmitted between the base station 200 and the WLAN AP 210 through a transmission network, a tunnel may be formed between the base station 200 and the WLAN AP 210 to transmit data.
  • the tunnel between the base station 200 and the WLAN AP 210 includes tunnel protocol data between the base station 200 and the terminal 220 as a payload.
  • the tunnel between the base station 200 and the WLAN AP 210 may be configured in units of radio bearers. In another method, the tunnel between the base station 200 and the WLAN AP 210 may be configured in a terminal unit.
  • the E-UTRAN is configured to add a WLAN carrier to the terminal at the RAN level as one carrier in the E-UTRAN, and effectively user plane data through the E-UTRAN carrier and / or WLAN carrier. There is an effect that can be configured to send.
  • FIG. 14 is a diagram illustrating a configuration of a base station according to another embodiment of the present invention.
  • the base station 1400 of the present invention additionally configures a WLAN carrier in a terminal and determines a transmission unit for transmitting and receiving data and additional configuration indication information for additional configuration of a WLAN carrier to the terminal.
  • 1420 and a receiving unit 1430 that receives confirmation information on WLAN association of the terminal from the WLAN terminal, and the WLAN terminal may check whether the terminal is connected to the WLAN using terminal identification information of the terminal. have.
  • the controller 1410 may determine whether to perform data transmission / reception by additionally configuring a WLAN carrier in an arbitrary terminal using data traffic information, base station load information, WLAN channel usage information, WLAN load information, and the like. That is, the controller 1410 may collect information of the base station, the terminal, and the WLAN end to determine whether to further configure a WLAN carrier in any terminal. Alternatively, the controller 1410 may receive and determine information on whether to add a WLAN carrier to an arbitrary terminal from an upper layer.
  • the controller 1410 is configured to add a WLAN carrier to the terminal as one carrier in the E-UTRAN at the E-UTRAN RAN level required to carry out the above-described invention, and the E-UTRAN carrier and / or WLAN carrier Through the control the overall operation of the base station 1400 according to the configuration to effectively transmit the user plane data.
  • the transmitter 1420 may transmit additional configuration indication information required for additional configuration of the WLAN carrier to the terminal.
  • the additional configuration indication information may include information for instructing the terminal to further configure the WLAN carrier.
  • the additional configuration indication information may include at least one of WLAN identification information, WLAN channel information, and configuration information of a bearer to be configured through the WLAN for the terminal to access a specific WLAN end point (WLAN AP).
  • the terminal further configures a radio bearer for transmitting and receiving data using a WLAN carrier by using the received additional configuration indication information.
  • the additional configuration indication information includes the information indicating the connection / authentication / connection to the WLAN terminal providing the WLAN carrier, the terminal uses the additional configuration indication information to the connection / authentication / connection to the WLAN terminal You can try
  • the transmitter 1420 may transmit the terminal identification information to the WLAN end.
  • the terminal identification information may include at least one of WLAN MAC address information, IP address information, IMSI related information, and C-RNTI information of the terminal.
  • the receiver 1430 may receive confirmation information on whether the corresponding terminal is associated with a WLAN end that provides a WLAN carrier from the WLAN end. For example, the terminal attempts to associate with the terminal identification information to the WLAN end based on the additional configuration indication information. The WLAN terminal proceeds with the terminal using the terminal identification information and, if the association procedure with the terminal is successful, transmits confirmation information including information about the terminal to the base station. If, when the association between the terminal and the WLAN terminal fails, confirmation information including information on the association failure is transmitted to the base station. Through this, the base station can determine whether the terminal instructing additional configuration of the WLAN carrier is ready to transmit and receive data through the WLAN end. Therefore, when data is transmitted or received by separating or interworking through a WLAN carrier, service interruption due to a failure in linkage between the WLAN terminal and the terminal can be minimized.
  • the reception unit 1430 may receive terminal identification information on the terminal for configuring to add a WLAN carrier from the WLAN end before transmitting the additional configuration indication information.
  • the terminal identification information may include at least one of WLAN MAC address information and IP address information of the terminal allocated by the WLAN terminal.
  • the receiver 1430 may receive terminal identification information from a terminal to additionally configure a WLAN carrier.
  • the terminal identification information may include at least one of WLAN MAC address information and IP address information of the terminal.
  • the base station may receive the terminal identification information received from the terminal, and may share the terminal identification information with the WLAN end.
  • the transmitter 1420 and the receiver 1430 are used to transmit and receive signals, messages, and data necessary for carrying out the above-described present invention with a terminal and a WLAN end point (WLAN AP).
  • WLAN AP WLAN end point
  • 15 is a diagram illustrating a terminal configuration according to another embodiment of the present invention.
  • the terminal 1500 is a WLAN carrier based on a reception unit 1530 and additional configuration indication information for receiving additional configuration indication information for additional configuration of a WLAN carrier from a base station.
  • the controller 1510 may further include a controller 1510 that attempts WLAN association through a WLAN carrier using terminal identification information.
  • the WLAN terminal transmits confirmation information on the WLAN association of the terminal to the base station.
  • the reception unit 1530 may receive the additional configuration indication information when the base station determines the additional configuration of the WLAN carrier to the corresponding terminal.
  • the additional configuration indication information may include information necessary for the terminal to further configure the WLAN carrier to transmit and receive data.
  • the additional configuration indication information may include information for instructing the terminal to further configure the WLAN carrier.
  • the additional configuration indication information may include at least one of WLAN identification information, WLAN channel information, and configuration information of a bearer to be configured through the WLAN for the terminal to access a specific WLAN end point (WLAN AP).
  • the additional configuration indication information may be included in the RRC connection reconfiguration message.
  • the receiver 1530 receives downlink control information, data, and a message from a base station or a WLAN terminal through a corresponding channel.
  • the controller 1510 further configures a radio bearer that transmits and receives data using a WLAN carrier using the received additional configuration indication information.
  • the controller 1510 performs a reconfiguration failure procedure when the terminal cannot add a configuration of additional configuration indication information received through higher layer signaling. That is, the controller 1510 may perform an RRC reestablishment procedure.
  • the controller 1510 may restore the configuration of the terminal to the configuration before receiving the additional configuration instruction information.
  • the transmitter 1520 may transmit information indicating cause or cause information to the base station through an RRC message.
  • the controller 1510 attempts WLAN association with the WLAN terminal through the WLAN carrier. For example, the controller 1510 may attempt to connect to the WLAN end using the terminal identification information.
  • the terminal identification information may include at least one of WLAN MAC address information, IP address information, International Mobile Subscriber Identity (IMSI) related information, and Cell-Radio Network Temporary Identifier (C-RNTI) information of the terminal.
  • the terminal identification information may be transmitted by the base station to the WLAN terminal so that the WLAN terminal may determine whether the terminal is successfully connected to the WLAN.
  • the controller 1510 may perform a WLAN connection attempt using the terminal identification information included in the additional configuration indication information.
  • the terminal identification information may include at least one of WLAN MAC address information and IP address information of the terminal allocated from the WLAN end.
  • the controller 1510 may attempt to associate with the WLAN using the terminal identification information allocated from the WLAN end point.
  • the transmitter 1520 may transmit the terminal identification information to the base station.
  • the terminal identification information may include at least one of WLAN MAC address information and IP address information of the terminal.
  • the controller 1510 configures the E-UTRAN required to carry out the above-described present invention to add the WLAN carrier to the terminal at the RAN level as one carrier in the E-UTRAN, and the E-UTRAN carrier and / or WLAN Controls the overall operation of the terminal 1500 in accordance with the configuration to effectively transmit user plane data through the carrier.
  • the transmitter 1520 transmits uplink control information, data, and a message to a base station or a WLAN terminal through a corresponding channel.

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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 une technologie d'émission/réception de données de plan d'utilisateur par ajout d'un opérateur WLAN à un opérateur E-UTRAN au niveau d'un réseau d'accès radio (RAN). En particulier, la présente invention concerne un procédé et un dispositif pour émettre/recevoir des données par un équipement d'utilisateur (UE), le procédé comprenant les étapes suivantes : réception, en provenance d'une station de base, d'informations supplémentaires d'indication de configuration pour effectuer une configuration supplémentaire d'un opérateur WLAN ; configuration supplémentaire de l'opérateur WLAN sur la base des informations supplémentaires d'indication de configuration ; et tentative d'association du WLAN par le biais de l'opérateur WLAN à l'aide des informations d'identification de l'UE, une extrémité du WLAN transmettant des informations de confirmation pour l'association du WLAN pour l'UE à la station de base.
PCT/KR2015/012139 2014-11-13 2015-11-11 Procédé et dispositif d'émission/réception de données à l'aide d'un opérateur wlan WO2016076634A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15/525,709 US10911942B2 (en) 2014-11-13 2015-11-11 Method and device for transmitting/receiving data using WLAN carrier
CN201580053460.3A CN107079449B (zh) 2014-11-13 2015-11-11 使用wlan载波发送/接收数据的方法和装置

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2014-0158198 2014-11-13
KR20140158198 2014-11-13
KR1020150155504A KR101905941B1 (ko) 2014-11-13 2015-11-06 Wlan 캐리어를 이용한 데이터 송수신 방법 및 그 장치
KR10-2015-0155504 2015-11-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108012264A (zh) * 2016-10-28 2018-05-08 苹果公司 用于802.1x载体热点和Wi-Fi呼叫认证的基于经加密的IMSI的方案
US11553561B2 (en) 2016-10-28 2023-01-10 Apple Inc. Protection of the UE identity during 802.1x carrier hotspot and wi-fi calling authentication

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CN102685825B (zh) * 2004-03-12 2016-01-20 美商内数位科技公司 在wtru中实施的用于切换无线技术的方法及设备
US9020505B2 (en) * 2008-09-17 2015-04-28 Qualcomm Incorporated Quick system selection and acquisition for multi-mode mobile devices
US9049643B2 (en) * 2010-07-22 2015-06-02 Lg Electronics Inc. Method and device for transmitting/receiving data in wireless access system supporting multi-radio access technology
WO2013141572A1 (fr) * 2012-03-19 2013-09-26 삼성전자 주식회사 Procédé et appareil de communication utilisant un point d'accès de réseau local (lan) sans fil
US9655012B2 (en) * 2012-12-21 2017-05-16 Qualcomm Incorporated Deriving a WLAN security context from a WWAN security context

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108012264A (zh) * 2016-10-28 2018-05-08 苹果公司 用于802.1x载体热点和Wi-Fi呼叫认证的基于经加密的IMSI的方案
US10833876B2 (en) 2016-10-28 2020-11-10 Apple Inc. Protection of the UE identity during 802.1x carrier hotspot and Wi-Fi calling authentication
US11553561B2 (en) 2016-10-28 2023-01-10 Apple Inc. Protection of the UE identity during 802.1x carrier hotspot and wi-fi calling authentication

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