WO2016053027A1 - Procédé de traitement de données à l'aide d'une porteuse wlan et appareil correspondant - Google Patents

Procédé de traitement de données à l'aide d'une porteuse wlan et appareil correspondant Download PDF

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Publication number
WO2016053027A1
WO2016053027A1 PCT/KR2015/010391 KR2015010391W WO2016053027A1 WO 2016053027 A1 WO2016053027 A1 WO 2016053027A1 KR 2015010391 W KR2015010391 W KR 2015010391W WO 2016053027 A1 WO2016053027 A1 WO 2016053027A1
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WIPO (PCT)
Prior art keywords
wlan
terminal
information
base station
data
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PCT/KR2015/010391
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English (en)
Korean (ko)
Inventor
홍성표
최우진
Original Assignee
주식회사 케이티
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Priority claimed from KR1020150125253A external-priority patent/KR20160040419A/ko
Priority claimed from KR1020150136064A external-priority patent/KR101985991B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to CN201580053056.6A priority Critical patent/CN106717060B/zh
Priority to US15/516,065 priority patent/US10736175B2/en
Publication of WO2016053027A1 publication Critical patent/WO2016053027A1/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
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the present invention relates to a method and apparatus for processing user plane data by adding a WLAN to an E-UTRAN carrier at a Radio Access Network (RAN) level.
  • RAN Radio Access Network
  • the present invention relates to a specific method and apparatus for transmitting or receiving specific user plane data through a WLAN in transmitting and receiving data.
  • the present invention also relates to a method and apparatus for a control plane procedure for transmitting or receiving specific user plane data through a WLAN carrier between a base station and a terminal.
  • 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 method and apparatus for transmitting and receiving data by forming a tunnel structure using a WLAN carrier and the base station.
  • the user plane data unit when a terminal transmits specific user plane data or a specific radio bearer, the user plane data unit may be separated or interworked on the E-UTRAN layer 2 to transmit or receive through an E-UTRAN carrier and / or a WLAN carrier. It is intended to provide a method and apparatus that can be.
  • the present invention is to provide a specific method and apparatus for providing a control plane procedure for transmitting and receiving data belonging to a specific bearer using a WLAN carrier.
  • the present invention is to provide a method and apparatus that can ensure efficient mobility by effectively controlling the WLAN carrier according to the movement of the terminal even when the terminal moves.
  • the present invention for solving the above problems is a method for processing data by the terminal, receiving higher layer signaling including indication information for requesting the establishment of a terminal tunnel protocol entity for processing data transmitted and received over a WLAN carrier. And constructing the terminal tunnel protocol entity based on the indication information and the indication information, and receiving and forwarding bearer specific user data to the corresponding terminal user plane entity.
  • the present invention also provides a method for processing data by a base station, the method comprising the steps of: transmitting a higher layer signaling to the terminal including the indication information requesting the establishment of a terminal tunnel protocol entity for processing data transmitted and received via a WLAN carrier; And configuring a base station tunnel protocol entity corresponding to the terminal tunnel protocol entity and adding and transmitting downlink tunnel endpoint identification information to bearer specific user data.
  • the present invention is a terminal for processing data, the terminal for receiving the upper layer signaling including the indication information for requesting the establishment of the terminal tunnel protocol entity for processing data transmitted and received via the WLAN carrier and the indication information based on
  • the terminal apparatus includes a control unit configured to configure a terminal tunnel protocol entity and receive bearer specific user data and transmit the bearer specific user data to a corresponding terminal user plane entity.
  • the present invention is a base station for processing data, the transmitter and the terminal tunnel for transmitting a higher layer signaling to the terminal including the indication information for requesting the establishment of a terminal tunnel protocol entity for processing data transmitted and received via the WLAN carrier And a control unit constituting a base station tunnel protocol entity corresponding to the protocol entity, wherein the transmitter provides a base station apparatus for adding and transmitting downlink tunnel endpoint identification information to bearer specific user data.
  • the present invention is a method for transmitting and receiving data in the terminal, based on receiving the WLAN radio resource configuration dedicated information for setting up data transmission and reception using the WLAN carrier from the base station, based on the WLAN radio resource configuration dedicated information, one or more Setting up a wireless bearer group including a wireless bearer to transmit and receive data through a WLAN carrier and transmitting and receiving data of the wireless bearer group through a WLAN carrier.
  • the present invention provides a method, characterized in that the WLAN radio resource configuration dedicated information includes at least one of WLAN identification information, encryption algorithm information and key information.
  • the WLAN radio resource configuration dedicated information provides a method characterized in that the information is set separately from the radio resource configuration dedicated information of the radio bearer for transmitting and receiving data using the base station carrier.
  • the present invention also provides a method for transmitting the WLAN measurement information and the WLAN radio resource configuration information to the target base station when the base station determines the handover of the terminal.
  • the present invention provides a method characterized in that the WLAN radio resource configuration dedicated information transmitted to the target base station is transmitted in a handover request message.
  • the present invention provides a method characterized in that the target base station is configured to cancel the WLAN radio resource configuration, and the data of the radio bearer group is transmitted and received using a base station carrier.
  • the present invention provides a method for transmitting and receiving data by the base station, generating a WLAN radio resource configuration dedicated information for setting up data transmission and reception using a WLAN carrier and transmitting the WLAN radio resource configuration dedicated information to the terminal and one; And transmitting / receiving data of the radio bearer group including the radio bearer through the WLAN carrier, wherein the WLAN radio resource configuration only information includes information for setting the radio bearer group to transmit and receive data through the WLAN carrier.
  • the present invention provides a method, characterized in that the WLAN radio resource configuration dedicated information includes at least one of WLAN identification information, encryption algorithm information and key information.
  • the present invention provides a method characterized in that the WLAN radio resource configuration dedicated information is set separately from the radio resource configuration dedicated information of the radio bearer for transmitting and receiving data using a base station carrier.
  • the method may further include determining a handover of the terminal. When the handover of the terminal is determined, the method further comprises transmitting WLAN measurement information and the WLAN radio resource configuration information to a target base station.
  • the present invention provides a method characterized in that the WLAN radio resource configuration dedicated information transmitted to the target base station is transmitted in a handover request message.
  • the present invention provides a method characterized in that the target base station is configured to cancel the WLAN radio resource configuration, and the data of the radio bearer group is transmitted and received using a base station carrier.
  • the present invention is a terminal for transmitting and receiving data, at least one radio bearing on the basis of a receiving unit for receiving the WLAN radio resource configuration dedicated information for setting up data transmission and reception using the WLAN carrier from the base station;
  • a terminal apparatus including a control unit configured to transmit and receive data through a WLAN carrier, and a wireless bearer group including a transmitter to transmit data through the WLAN carrier.
  • the present invention provides a terminal apparatus, characterized in that the WLAN radio resource configuration dedicated information includes at least one of WLAN identification information, encryption algorithm information, and key information.
  • the present invention also provides a terminal apparatus, wherein the WLAN radio resource configuration dedicated information is information set separately from radio resource configuration dedicated information of a radio bearer that transmits and receives data using a base station carrier.
  • the present invention provides a terminal device, characterized in that for transmitting the WLAN measurement information and the WLAN radio resource configuration dedicated information to the target base station, when the handover of the terminal is determined.
  • the present invention provides a terminal apparatus, characterized in that the WLAN radio resource configuration dedicated information transmitted to the target base station is included in the handover request message and transmitted.
  • the present invention also provides a terminal apparatus, wherein the target base station releases a WLAN radio resource configuration and configures data of the radio bearer group to be transmitted and received using a base station carrier.
  • the present invention provides a base station for transmitting and receiving data, a control unit for generating WLAN radio resource configuration dedicated information for setting data transmission and reception using a WLAN carrier, a transmitter for transmitting WLAN radio resource configuration dedicated information to the terminal and one or more radios
  • a base station apparatus including a receiving unit for receiving data of a radio bearer group including a bearer through a WLAN carrier, wherein the WLAN radio resource configuration only information includes a base station apparatus including information for setting the radio bearer group to transmit and receive data through the WLAN carrier; to provide.
  • the present invention also provides a base station apparatus, wherein the WLAN radio resource configuration dedicated information includes at least one of WLAN identification information, encryption algorithm information, and key information.
  • the present invention also provides a base station apparatus, wherein the WLAN radio resource configuration dedicated information is information set separately from radio resource configuration dedicated information of a radio bearer that transmits and receives data using a base station carrier.
  • the present invention also provides a base station apparatus, wherein the transmitter transmits WLAN measurement information and dedicated WLAN radio resource configuration information to a target base station when handover of the terminal is determined.
  • the present invention provides a base station apparatus characterized in that the WLAN radio resource configuration dedicated information transmitted to the target base station is included in the handover request message and transmitted.
  • the present invention also provides a base station apparatus, wherein the target base station releases a WLAN radio resource configuration, and configures data of the radio bearer group to be transmitted and received using a base station carrier.
  • the base station and the terminal provides the effect that can transmit and receive data by forming a tunnel structure using a WLAN carrier.
  • the UE when the UE transmits specific user plane data or a specific radio bearer, the UE transmits or receives through an E-UTRAN carrier and / or a WLAN carrier by separating or interworking user plane data units on the E-UTRAN layer 2. It can work.
  • FIG. 1 is a diagram illustrating an example of a data transmission path using an E-UTRAN carrier and a WLAN carrier.
  • FIG. 2 is a diagram illustrating another 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 a structure of a user plane protocol in an EPS (Evolved Packet System).
  • EPS Evolved Packet System
  • FIG. 6 is a diagram illustrating an example of a user plane protocol structure according to the present invention.
  • FIG. 7 illustrates another example of a user plane protocol structure according to the present invention.
  • FIG. 8 is a view for explaining the operation of the terminal 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 view for explaining the operation of the base station according to another embodiment of the present invention.
  • FIG. 11 is a diagram for explaining an operation of a base station according to another embodiment of the present invention.
  • GTP-U GPRS Tunnelling Protocol-User Plane
  • FIG. 13 is a view showing the configuration of a terminal according to another embodiment of 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 an example of a network configuration scenario for the present invention.
  • 17 is a view for explaining the operation of the terminal according to an embodiment of the present invention.
  • FIG. 18 is a diagram for explaining an operation of a base station 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 interpreted in a comprehensive sense to indicate some areas or functions covered by a base station controller (BSC) in CDMA, a NodeB in WCDMA, an eNB or a sector (site) in LTE, and the like. It is meant to cover various coverage areas such as mega cell, macro cell, micro cell, pico cell, femto cell 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
  • 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 may include at least one of an E-UTRAN signal strength threshold, a WLAN channel usage threshold, a WLAN backhaul data rate threshold, a WLAN signal strength, and an offload preference indicator.
  • the E-UTRAN may provide a list of WLAN identifiers to the terminal through broadcast signaling.
  • the terminal uses the RAN assistance parameters to evaluate the access network selection and traffic steering rules. When the access network selection and traffic control rules are satisfied (fulfilled), the terminal indicates this to the upper layer (access stratum) AS.
  • the terminal When 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 above-described interworking function has a problem in that the E-UTRAN and the WLAN are independently established and interworked so that the base station can not control the radio resource more tightly in consideration of the radio state or mobility of the terminal.
  • the E-UTRAN adds the 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 the WLAN carrier.
  • the E-UTRAN adds the 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 the WLAN carrier.
  • the aforementioned 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.
  • a WLAN radio link, a WLAN radio, a WLAN radio resource, or a WLAN radio network is described as a WLAN carrier for convenience of understanding.
  • the E-UTRAN transmits user plane data through the E-UTRAN carrier and / or WLAN carrier by adding the WLAN carrier as one carrier in the E-UTRAN at the RAN level
  • the radio bearer is divided according to the user plane data characteristics.
  • the user plane data unit could not be separated (eg split or routing) or interworked on the E-UTRAN layer 2 in units.
  • the E-UTRAN transmits user plane data through the E-UTRAN carrier and the WLAN carrier by adding the WLAN carrier as one carrier at the RAN level
  • the UE is divided according to specific user plane data characteristics.
  • the user plane data unit cannot be transmitted and received separately or in association with each radio bearer.
  • the present invention provides an E-UTRAN carrier and / or WLAN carrier by separating or interworking user plane data units on an E-UTRAN layer 2 when a UE transmits specific user plane data or a specific radio bearer.
  • An object of the present invention is to provide a method that can be transmitted or received through.
  • the present invention may be provided in a scenario where a base station (eNode-B) 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 even in a scenario in which a base station (eNode-B) and a WLAN end point are co-located.
  • 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. In the following description, the foregoing WLAN termination will be described as WLAN AP or AP.
  • the E-UTRAN In order for the E-UTRAN to add a WLAN carrier to a terminal at the RAN level as one carrier in the E-UTRAN and to transmit and receive user plane data using the E-UTRAN carrier and the WLAN carrier, 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 conceptually means 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.
  • the user plane data unit may be split (or split) or interworked on a sub-layer to transmit user data.
  • 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.
  • 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.
  • 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.
  • the following description will be given as an example of separating or interworking in the PDCP layer. Interworking can be similarly applied only as the subject of the entity is changed from PDCP to another layer (eg RLC). 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. 1 is a diagram illustrating an example of a data transmission path using an E-UTRAN carrier and a WLAN carrier.
  • the base station 100 may transmit and receive uplink and downlink data to the terminal 120 through an eNB carrier.
  • the WLAN AP 110 may also transmit and receive both uplink and downlink data to the terminal 120 using the WLAN carrier.
  • both the eNB carrier and the WLAN carrier can process uplink and downlink data.
  • FIG. 2 is a diagram illustrating another example of a data transmission path using an E-UTRAN carrier and a WLAN carrier.
  • the base station 100 may transmit and receive uplink and downlink data to the terminal 120 through an eNB carrier.
  • the WLAN AP 110 may transmit only downlink data to the terminal 120 using the WLAN carrier. That is, the eNB carrier and the WLAN carrier may be used simultaneously for the downlink, but only the eNB carrier may be used for the uplink.
  • FIG. 3 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 WLAN carriers. That is, the base station 100 and the WLAN AP 110 may transmit and receive downlink and uplink data to the terminal 120 using the WLAN carrier.
  • FIG. 4 is a diagram illustrating another example of a data transmission path using an E-UTRAN carrier and a WLAN carrier.
  • the base station 100 may receive uplink data from the terminal 120 using an eNB carrier.
  • downlink data may be transmitted using the WLAN carrier through the WLAN AP 110. That is, the eNB carrier may handle uplink transmission, and the WLAN carrier may handle downlink transmission, respectively.
  • the base station 100 is connected to the terminal 120 through the WLAN AP 110 for the downlink and the terminal 120 is connected to the base station 100 through the WLAN AP 110 for the uplink.
  • the aforementioned eNB carrier refers to an E-UTRAN carrier and means a carrier formed through an E-UTRAN radio resource.
  • FIG. 5 is a diagram illustrating a structure of a user plane protocol in an EPS (Evolved Packet System).
  • EPS Evolved Packet System
  • user data (or IP packet) sent from an UE to an eNB through an E-UTRAN carrier is transmitted through an S1 GTP tunnel between an eNB and an S-GW, and an S5 GTP tunnel between an S-GW and a P-GW.
  • Is sent That is, between two nodes on the LTE network (for example, between an eNB and an MME or between an eNB and an SGW or between an MME and an SGW or between an SGW and a PGW) using a GTP-U tunnel through a GTP-based interface to control data or a user.
  • the data is sent.
  • the UE and the base station can distinguish and transmit user plane data belonging to a specific radio bearer using the E-UTRAN layer 2 protocol without a GTP tunnel.
  • the base station can know through which tunnel endpoint identifier (TEID) of the S1 GTP tunnel the G1 header sends the data to which radio bearer of which terminal.
  • the base station may know which S1 GTP tunnel to transmit to the uplink user plane data received from the terminal by dividing the radio bearer per terminal.
  • TEID tunnel endpoint identifier
  • the base station may be set up or configured or set up a tunnel between the terminal and the base station to add a WLAN carrier to the terminal to transmit user plane data between the terminal and the base station through the WLAN AP.
  • the tunnel between the terminal and the base station may mean a WLAN interworking tunnel or any tunnel based on header encapsulation for transmission through the WLAN.
  • the tunnel between the aforementioned terminal and the base station will be described as a GTP tunnel. This is for convenience of description only, and the use of any tunnel based on header encapsulation is included in the scope of the present invention.
  • FIG. 6 is a diagram illustrating an example of a user plane protocol structure according to the present invention.
  • 7 illustrates another example of a user plane protocol structure according to the present invention.
  • the WLAN AP 110 indicates that routing is performed at the IP layer, the WLAN AP 110 performs routing / switching or MAC switching on the data link layer. It is also included in the scope of the present invention.
  • the GTP tunnel may be set up in the base station 100 and the terminal 120.
  • the base station 100 uses the downlink tunnel to GTP tunneling user data to be transmitted by being separated or interworked through the WLAN carrier. Can be transported via a protocol.
  • the terminal 120 uses the uplink tunnel to separate or interwork with the WLAN carrier to transmit user data to be transmitted through the GTP tunneling protocol. Can be transported through.
  • the above-described tunnel between the base station 100 and the terminal 120 is encapsulated in a user data packet (IP packet encapsulated between a given pair of tunnel endpoints. Or E-UTRAN Layer 2 SDU / PDU or E-UTRAN Layer 2 user data or Ux UP SDU / PDU).
  • a tunnel between the base station 100 and the terminal 120 may be assigned to a given tunnel endpoint ( tunnel endpoints can be used to carry PDCP SDUs / PDUs (or Ux UP SDUs / PDUs) between pairs.
  • the tunnel between the base station 100 and the terminal 120 may be assigned to a given tunnel endpoint ( tunnel endpoints can be used to carry RLC PDUs (or Ux UP SDUs / PDUs) between pairs.
  • the tunnel protocol header (eg, GTP header or header on any tunnel based on header encapsulation) of the tunnel between the base station 100 and the terminal 120 described above may include a tunnel endpoint identification (eg, TEID) field. Include. This field unambiguously identifies the tunnel endpoint within the receiving tunnel protocol entity.
  • the tunnel protocol entity may be a GTP-U protocol entity or GTP protocol entity or interworking entity or interworking protocol entity or GTP tunnel entity or GTP-U tunnel entity or GTP entity or GTP-U entity or interworking entity or aggregation entity or merge protocol entity or It may mean a transport protocol entity.
  • the tunnel endpoint included in the tunnel protocol header may indicate a tunnel to which a particular user data packet (IP packet or E-UTRAN Layer 2 SDU / PDU or E-UTRAN Layer 2 user data or Ux UP SDU / PDU) belongs.
  • the tunnel endpoint included in the tunnel protocol header may indicate to distinguish the radio bearer or radio bearer entity (or PDCP entity or RLC entity or Ux UP entity) to which a particular user data packet belongs.
  • the tunnel endpoint included in the tunnel protocol header may allow a specific user data packet to be mapped to the radio bearer or the radio bearer entity.
  • Tunnel endpoint identification information (eg, TEID) included in the tunnel protocol header may demultiplex incoming traffic so that it is delivered to the corresponding user plane radio bearer entity.
  • the terminal receiving the data through the downlink tunnel may receive the tunnel endpoint identification information.
  • PDCP SDUs / PDUs may be delivered / submitted to a PDCP entity in a peered or corresponding terminal.
  • the Ux UP object separates data to be transmitted through an E-UTRAN carrier and / or data to be transmitted through a WLAN carrier.
  • the terminal receiving data through the downlink tunnel may transmit / submit the Ux UP SDUs / PDUs to the Ux UP entity in the peered or corresponding terminal using the tunnel endpoint identification information.
  • the terminal receiving the data through the downlink tunnel may use the tunnel endpoint identification information.
  • RLC PDUs may be delivered / submitted to an RLC entity in a peered or corresponding UE by using.
  • the aforementioned tunnel protocol entity may be provided to the base station and the terminal.
  • the tunnel protocol entity may be configured in association with one radio bearer in each direction. That is, the tunnel protocol entity may distinguish and receive data through one tunnel endpoint identification information.
  • the terminal may distinguish data belonging to a specific radio bearer through downlink tunnel endpoint identification information and transmit the data to a corresponding radio bearer entity.
  • the terminal may transmit uplink tunnel endpoint identification information in data belonging to a specific radio bearer.
  • a tunnel protocol entity may be configured in association with one or more radio bearers.
  • data traffic belonging to a corresponding radio bearer may be distinguished and received through one or more tunnel endpoints.
  • the tunnel protocol entity may transmit traffic by distinguishing corresponding radio bearers through one or more tunnel endpoints.
  • the tunnel protocol entity receives the traffic mapped to the Layer 2 entity of one or more radio bearers and forwards the traffic to the Layer 2 entity of the radio bearer peered to it or to the Layer 2 entity of the corresponding radio bearer via tunnel endpoint identification. Can be.
  • the UDP destination port number may use the same value.
  • the port number 2152 registered for the GTP-U may be used.
  • the user data packet may be encapsulated with a GTP header (or tunnel protocol header or IPSEC header), a UDP header (or TCP header) and an IP header.
  • GTP header or tunnel protocol header or IPSEC header
  • UDP header or TCP header
  • IP header an IP header
  • the resulting outer IP packet is larger than the maximum transmission unit (MTU) of the first link to the destination endpoint, fragmentation of the IP packet may be performed.
  • MTU maximum transmission unit
  • Received IP packets or reassembled IP packets are passed through to the IP / UDP / GTP layer to allow user data packets (IP packets or E-UTRAN Layer 2 SDU / PDU or E-UTRAN Layer 2 user data or PDCP).
  • SDUs / PDUs or RLC PDUs or Ux UP SDUs / PDUs are extracted.
  • the extracted user data packet is delivered to the (Layer 2) entity of the corresponding radio bearer.
  • Ux UP protocol (or Ux user plane protocol or E-UTRAN wireless network user on Ux interface) to provide delivery of control information to provide confirmation of the delivery of PDCP SDUs / PDUs on the Ux interface or successful delivery of PDCP SDUs / PDUs.
  • a protocol for controlling plane data transmission hereinafter referred to as Ux UP protocol may be provided.
  • control information for providing confirmation of the delivery of PDCP SDUs / PDUs or the successful delivery of PDCP SDUs / PDUs on the Ux interface may be delivered.
  • the Ux UP protocol may be located in a user plane of a radio network layer on an interface connected through a WLAN carrier between a base station and a terminal.
  • the Ux UP protocol may be located in a layer 2 user plane on an interface Ux connected between a base station and a terminal through a WLAN carrier.
  • the Ux UP protocol may be located in the PDCP layer user plane on an interface Ux connected between the base station and the terminal through a WLAN carrier.
  • the Ux UP protocol may be located in the RLC layer user plane on an interface Ux connected between the base station and the terminal via a WLAN carrier.
  • the Ux UP protocol may be located in the upper layer user plane of the PDCP on an interface Ux connected between the base station and the terminal through a WLAN carrier.
  • the Ux UP protocol may be located in a lower layer user plane of the PDCP on an interface Ux connected between a base station and a terminal through a WLAN carrier.
  • the Ux UP protocol may be located in the user plane between the PDCP and the RLC layer on an interface Ux connected between the base station and the terminal through a WLAN carrier.
  • Each Ux UP protocol entity may be associated with only one radio bearer (eg, data radio bearer / S1 bearer / EPS bearer). Alternatively, each Ux UP protocol entity may be associated with only one E-RAB.
  • the Ux UP protocol entity herein may be represented as a Ux protocol instance or Ux protocol instance or Ux interworking entity or Ux interworking instance or interworking entity or interworking protocol entity or interworking entity or aggregation entity or transport protocol entity. . However, for the sake of understanding, the present disclosure will be described as a Ux UP protocol entity.
  • the Ux UP protocol entity may be configured at the base station and the terminal where the radio bearer is set up / added / configured on the Ux interface.
  • the base station includes Ux UP protocol configuration information for setting the Ux UP protocol entity in the radio bearer configuration information DRB-ToAddMod configured to be bearer-specific (or radio bearer specific). It can be delivered to the UE through an RRC Reconfiguration message.
  • Ux UP protocol data or Ux UP SDU (s) / PDU (s) may be included in the GTP-U protocol.
  • Ux UP protocol data or Ux UP SDU (s) / PDU (s) may be included in a GTP-U protocol header.
  • Ux UP protocol data or Ux UP SDU (s) / PDU (s) may be included in a GTP-U extension header.
  • Ux UP protocol data or Ux UP SDU (s) / PDU (s) may be included by defining a field (or container) for the Ux UP protocol in the GTP-U Extension header.
  • the Ux UP protocol can only be used to carry control information to provide an indication / confirmation of successful delivery of PDCP SDUs / PDUs on the Ux interface, and PDCP SDUs / PDUs are placed in the GTP-U payload as shown in FIG. It can be included and delivered.
  • Ux UP protocol data or Ux UP PDU (s) may be included in a GTP-U payload.
  • the Ux UP protocol data may be encapsulated by attaching a GTP-U header.
  • the Ux UP protocol (or Ux UP entity) may be encapsulated by attaching a Ux UP header to PDCP SDUs / PDUs.
  • the Ux UP protocol may be used for delivery / transport of control information to provide indication / confirmation of delivery / transportation of PDCP SDUs / PDUs and / or successful delivery of PDCP PDUs on the Ux interface.
  • Ux UP protocol data or Ux UP PDU (s) may be included in a GTP-U payload.
  • the Ux UP protocol data may be encapsulated by attaching a GTP-U header.
  • the Ux UP protocol (or Ux UP entity) may be encapsulated by attaching a Ux UP header to PDCP SDUs / PDUs.
  • the Ux UP entity may be an entity for distinguishing PDCP SDUs (IP packets).
  • the Ux UP protocol may provide a sequence number for user data (or PDCP SDUs / PDUs) transmitted from the base station to the terminal through the WLAN.
  • the Ux UP protocol may provide a sequence number for user data (or PDCP SDUs / PDUs) transmitted from the terminal to the base station through the WLAN carrier.
  • the Ux UP protocol may provide a sequence number for control information for providing an indication / confirmation of successful delivery of user data (or PDCP SDUs / PDUs) transmitted from a base station to a terminal through a WLAN carrier.
  • the Ux UP protocol may provide a sequence number for control information for providing indication / confirmation for successful delivery of user data (or PDCP PDUs) transmitted from the terminal to the base station via the WLAN carrier.
  • FIG. 8 is a view for explaining the operation of the terminal according to an embodiment of the present invention.
  • a terminal In a method for processing data, a terminal according to an embodiment of the present invention, receiving higher layer signaling including indication information for requesting establishment of a terminal tunnel protocol entity for processing data transmitted and received through a WLAN carrier. And configuring the terminal tunnel protocol entity based on the indication information and receiving bearer specific user data and transmitting the bearer specific user data to the corresponding terminal user plane entity.
  • the terminal may include receiving higher layer signaling including indication information for requesting establishment of a terminal tunnel protocol entity for processing data transmitted and received through a WLAN carrier (S810).
  • the terminal needs to configure a tunnel protocol entity in order to transmit and receive data with the base station using the aforementioned tunnel.
  • the terminal may receive indication information for requesting the establishment of the terminal tunnel protocol entity included in the higher layer signaling from the base station.
  • higher layer signaling including the indication information may be an RRC reconfiguration message.
  • the terminal tunnel protocol entity serves to process data transmitted or received in isolation or interworking using a WLAN carrier.
  • the terminal tunnel protocol entity may deliver data received by being separated or interworked through the WLAN carrier to the peered entity in the terminal.
  • the terminal tunnel protocol entity may perform an operation for delivering data to a base station by separating or interworking through a WLAN carrier.
  • the terminal may include configuring a terminal tunnel protocol entity based on the indication information (S820).
  • the terminal may configure the terminal tunnel protocol entity in the terminal based on the indication information received through higher layer signaling. For example, the terminal may configure the terminal tunnel protocol entity through the downlink tunnel endpoint identification information included in the radio bearer configuration information of the higher layer signaling described above.
  • the terminal may include receiving bearer specific user data and transmitting the bearer specific user data to the corresponding terminal user plane entity (S830).
  • the bearer specific user data received by the terminal means downlink user data and may include downlink tunnel endpoint identification information. Accordingly, the terminal may identify downlink tunnel endpoint identification information included in bearer specific user data and process the received data for each radio bearer.
  • the terminal may receive and process data that is separated or interworked using the WLAN carrier, and may transmit data through the WLAN carrier.
  • FIG. 9 is a view for explaining the operation of the terminal according to another embodiment of the present invention.
  • the terminal of the present invention includes receiving indication information for configuring a terminal tunnel protocol entity (S910).
  • the downlink tunnel endpoint identification information for each radio bearer may be allocated according to the indication information (S920).
  • the terminal may inform the base station of the assigned tunnel endpoint identification information for each radio bearer.
  • the method may include receiving bearer specific downlink user data and transmitting the bearer specific downlink user data to a corresponding terminal user plane entity (S940).
  • the above-described downlink data may include downlink tunnel endpoint identification information. That is, the terminal may receive downlink data including the downlink tunnel endpoint identification information and transmit the downlink data to the layer 2 entity in the corresponding terminal using the tunnel endpoint identification information.
  • the terminal may receive higher layer signaling including radio bearer configuration information for the radio bearer configured to transmit uplink data through the WLAN carrier (S910).
  • the radio bearer configuration information may include at least one of transport layer address information of the base station, UDP port number, and uplink tunnel endpoint identification information of the base station.
  • the uplink tunnel endpoint identification refers to tunnel endpoint identification information of the base station tunnel protocol entity configured in the base station.
  • the terminal may transmit the uplink tunnel endpoint identification information in the uplink data transmission.
  • FIG. 10 is a view for explaining the operation of the base station according to another embodiment of the present invention.
  • a higher layer signaling including indication information for requesting the establishment of a terminal tunnel protocol entity for processing data transmitted and received through a WLAN carrier to the terminal. Transmitting, configuring a base station tunnel protocol entity corresponding to the terminal tunnel protocol entity, and adding and transmitting downlink tunnel endpoint identification information to bearer specific user data.
  • the base station may include transmitting, to the terminal, higher layer signaling including indication information for requesting establishment of a terminal tunnel protocol entity for processing data transmitted and received through a WLAN carrier (S1010).
  • the base station may generate and transmit the indication information of the terminal tunnel protocol entity to transmit and receive data by separating or interworking with the WLAN carrier to the terminal.
  • the terminal configures a terminal tunnel protocol entity in the terminal based on the received indication information.
  • the base station may include configuring a base station tunnel protocol entity corresponding to the terminal tunnel protocol entity (S1020).
  • the base station may configure a base station tunnel protocol entity corresponding to the terminal tunnel protocol entity to transmit and receive data using the WLAN carrier.
  • Configuring the base station tunnel protocol entity corresponding to the terminal tunnel protocol entity may include transmitting higher layer signaling to the terminal, the upper layer signaling including indication information for requesting the establishment of the terminal tunnel protocol entity for processing data transmitted and received through the WLAN carrier. May be performed previously.
  • the base station may assign downlink tunnel endpoint identification information to be used for reception processing by the terminal and / or uplink tunnel endpoint identification information to be used for transmission processing by the terminal.
  • the base station may include the step of adding the downlink tunnel endpoint identification information to the bearer specific user data for transmission (S1030).
  • the base station may transmit the downlink tunnel endpoint identification information.
  • FIG. 11 is a diagram for explaining an operation of a base station according to another embodiment of the present invention.
  • steps S1110 and S1130 are the same as steps S1010 and S1030 described above.
  • the base station may further include receiving the aforementioned downlink tunnel endpoint identification information between steps S1110 and S1130 (S1120).
  • the terminal may allocate downlink tunnel endpoint identification information for each radio bearer according to indication information included in higher layer signaling.
  • the tunnel endpoint identification information for each allocated radio bearer may be informed to the base station.
  • the base station may transmit downlink tunnel endpoint identification information in downlink data transmitted to the terminal using a WLAN carrier.
  • the radio bearer configuration information included in the higher layer signaling may include at least one of transport layer address information of the base station, UDP port number, and uplink tunnel endpoint identification information of the base station.
  • the terminal may transmit uplink data through the corresponding radio bearer using radio bearer configuration information including uplink tunnel endpoint identification information. In this case, the terminal may transmit uplink data including the uplink tunnel endpoint identification information.
  • the base station and the terminal provides the effect that can transmit and receive data by forming a tunnel structure using a WLAN carrier.
  • the UE transmits specific user plane data or a specific radio bearer
  • the UE transmits or receives through an E-UTRAN carrier and / or a WLAN carrier by separating or interworking user plane data units on the E-UTRAN layer 2. It can work.
  • the base station may include information for instructing the terminal to setup or establish the aforementioned downlink terminal tunnel protocol entity in an RRC reconfiguration message and transmit the information to the terminal.
  • the base station if the aforementioned downlink terminal tunnel protocol entity is set up / established, RRC information for instructing the terminal to release it in consideration of the WLAN radio quality, the base station radio resources, etc. It may be included in the reconfiguration message and transmitted to the terminal.
  • the downlink case is described, and the terminal tunnel protocol entity is described as a downlink tunnel protocol entity.
  • the base station may be configured to instruct the terminal to setup or establish the aforementioned terminal tunnel protocol entity (eg, one or more of bearer identification information such as downlink tunnel endpoint identification information, IP address, and terminal identification information). Information) may be included in an RRC reconfiguration message and transmitted to the terminal.
  • the UE performs an RRC message (eg, an RRC Connection Reconfiguration message or a UE information Request message or an existing RRC message or a new RRC) including information for instructing the UE to setup / establish the aforementioned downlink tunnel protocol entity from the base station. Message).
  • the terminal may transmit an upper layer message including the confirmation of the downlink tunnel establishment to the base station. For example, the confirmation of the downlink tunnel configuration described above may be transmitted through an RRC Connection Complete message.
  • the above-described downlink tunnel establishment confirmation may include an RRC message (for example, a UE Information Response message or UE Assistance message or an existing RRC message or a new RRC message) separated from the RRC Connection Complete message after the RRC Connection Complete message. For a WLAN status message)).
  • RRC message for example, a UE Information Response message or UE Assistance message or an existing RRC message or a new RRC message
  • the base station may set up the downlink tunnel described above to transmit user data (IP packets or PDCP SDUs / PDUs or RLC PDUs) belonging to a specific radio bearer to the terminal by separating or interworking with the WLAN carrier.
  • the base station for instructing / distinguishing the user data (IP packet or PDCP SDUs / PDUs or RLC PDUs) received by the terminal to deliver / map to the corresponding layer 2 entity (Ux UP entity or PDCP entity or RLC entity)
  • the information may be included in the RRC reconfiguration message and transmitted to the terminal.
  • the base station transmits user data (IP packets or PDCP SDUs / PDUs or RLC PDUs or Ux UP SDUs / PDUs) belonging to a specific radio bearer received by the terminal through a WLAN carrier separated or interworked.
  • Entity or Ux UP entity tunnel endpoint identification information may be included in the radio bearer configuration information (DRB-ToAddMod) configured to be bearer-specifiable (or per radio bearer).
  • the terminal which has received the tunnel endpoint identification information and configured the downlink tunnel protocol entity, may use the terminal 2 entity (PDCP entity or RLC entity) corresponding to the received user data (or PDCP PDUs or RLC PDUs or Ux UP PDU). Can be delivered / submitted
  • the terminal may instruct the base station to setup / establish the aforementioned downlink tunnel protocol entity or information necessary to setup / establish the aforementioned downlink tunnel protocol entity.
  • an RRC message eg, an RRC Connection Reconfiguration message or UE information
  • bearer identification information such as downlink tunnel endpoint identification information, IP address, terminal identification information or WLAN association status information, and WLAN measurement information.
  • a request message or an existing RRC message or a new RRC message may be received, for example, the new RRC message may be a WLAN status request message, however, the WLAN status request message is illustrative and not limited to names.
  • new RRC messages have no restrictions on their names and functions. Allocates locally the tunnel endpoint identification information of the downlink tunnel described above and transmits it to the base station through a higher layer message (eg, an RRC Connection Reconfiguration Complete or UE Information Response message or UE Assistance message or an existing RRC message or WLAN Status message). I can deliver it.
  • a higher layer message eg, an RRC Connection Reconfiguration Complete or UE Information Response message or UE Assistance message or an existing RRC message or WLAN Status message.
  • the terminal may instruct the base station to setup / establish the aforementioned downlink tunnel protocol entity or information necessary to setup / establish the aforementioned downlink tunnel protocol entity.
  • an RRC message eg, an RRC Connection Reconfiguration message or UE information
  • UE information including information for requesting downlink tunnel endpoint identification information, terminal identification information such as an IP address, bearer identification information or WLAN association status information, and WLAN measurement information.
  • Request message or existing RRC message or WLAN status request message can be received.
  • the UE locally allocates the above-mentioned tunnel endpoint identification information of the downlink tunnel and transmits the upper layer message (eg, an RRC Connection Reconfiguration Complete or UE Information Response message or UE Assistance message or an existing RRC message or WLAN status message). It can be delivered to the base station through.
  • the base station may send an RRC message (eg, an RRC Connection Reconfiguration message) including information for indicating data reception through the downlink tunnel protocol entity described above.
  • RRC message eg, an RRC Connection Reconfiguration message
  • the terminal may instruct the base station to setup / establish the aforementioned downlink tunnel protocol entity or information necessary to setup / establish the aforementioned downlink tunnel protocol entity.
  • an RRC message eg, an RRC Connection Reconfiguration message or a UE information request
  • bearer identification information such as downlink tunnel endpoint identification information, IP address, terminal identification information or WLAN association status information, and WLAN measurement information.
  • the terminal locally allocates the aforementioned tunnel endpoint identification of the downlink tunnel and / or attempts to connect to the WLAN (WLAN association) and / or assigns an IP address via WLAN and / or between the terminal and the base station via WLAN. Perform security settings.
  • the relevant information may be delivered to the base station through an upper layer message (eg, an RRC Connection Reconfiguration Complete or UE Information Response message or UE Assistance message or an existing RRC message or WLAN status message). Thereafter, the base station may send an RRC message (eg, an RRC Connection Reconfiguration message) including information for indicating data reception through the downlink tunnel protocol entity described above.
  • an upper layer message eg, an RRC Connection Reconfiguration Complete or UE Information Response message or UE Assistance message or an existing RRC message or WLAN status message.
  • the base station may include information for instructing the terminal to setup / establish the aforementioned uplink terminal tunnel protocol entity in the RRC reconfiguration message and transmit the information to the terminal.
  • the base station if the aforementioned uplink terminal tunnel protocol entity is set up / established, RRC information for instructing the terminal to release in consideration of the WLAN radio quality, the base station radio resources, etc. It may be included in the reconfiguration message and transmitted to the terminal.
  • the terminal tunnel protocol entity will be described as an uplink tunnel protocol entity.
  • the downlink tunnel protocol entity and the uplink tunnel protocol entity may be configured separately or may be configured in the terminal tunnel protocol entity.
  • the base station establishes the above-described uplink tunnel and transmits user data (IP packet or PDCP SDUs / PDUs or RLC PDUs or Ux UP SDUs / PDUs) belonging to a specific radio bearer to the base station by separating or interworking with the WLAN carrier.
  • user data IP packet or PDCP SDUs / PDUs or RLC PDUs or Ux UP SDUs / PDUs
  • Information to be included may be included in an RRC message (eg, an RRC Connection Reconfiguration message) and transmitted.
  • the radio bearer configuration information DRB-ToAddMod configured to be bearer-specifiable may include a transport layer address (or IP address), a UDP port number, and a base station. It may include at least one information of the tunnel endpoint identification information, the tunnel security parameters of the base station. Or, if the UDP port number is specified and used, it may not be included.
  • the transport layer address (or IP address) and the UDP port number of the base station may be configured UE-specifically (or UE-specific). For example, it may be included in radio resource configuration dedicated information (RadioResourceConfigDedicated).
  • RadioResourceConfigDedicated radio resource configuration dedicated information
  • the tunnel endpoint identification information may be included in the radio bearer configuration information DRB-ToAddMod configured to be bearer-specifiable (or for each radio bearer). If the UDP port number is specified and used, it may not be included.
  • GTP-U GPRS Tunnelling Protocol-User Plane
  • GTPv1-U shows a GTP-U header on the 3GPP TS 29.281 GPRS Tunneling Protocol User Plane (GTPv1-U).
  • GTPv1-U 3GPP TS 29.281 GPRS Tunneling Protocol User Plane
  • the tunnel endpoint identifier was 32. Bit allocated.
  • the user terminal may be distinguished by itself. Therefore, when configuring a tunnel between the terminal and the base station, it is possible to configure and use a smaller number of tunnel endpoints than the tunnel endpoint to be provided between the two nodes on the network.
  • the terminal when using a WLAN carrier as the downlink only, as shown in FIGS. 2 and 4, when configuring a downlink tunnel, the terminal may identify the tunnel endpoint considering only the number of radio bearers to be provided to one terminal. Because you need to organize the information, you can assign fewer bits to the tunnel endpoint identification field. For example, when considering logical channel identification information (logicalChannelIdentity) having a value between 3 and 10, 3 bits may be allocated to the tunnel endpoint identification field to have 8 values. Alternatively, the logical channel identification information may be used as the tunnel endpoint identification information (or included in the tunnel endpoint identification information).
  • logicalChannelIdentity logicalChannelIdentity
  • DRB identification information having a value between 1 and 32, it may be configured to have 32 values by allocating 5 bits to the tunnel endpoint identification information field.
  • the DRB identification information may be used as the tunnel endpoint identification information (or included in the tunnel endpoint identification information).
  • eps-BearerIdentity having a value between 0 and 15, it may be configured to have 16 values by allocating 4 bits to the tunnel endpoint identification information field.
  • eps-BearerIdentity may be used (including in tunnel endpoint identification information) as tunnel endpoint identification information.
  • the terminal may be configured to have 16 values by allocating 4 bits in the tunnel endpoint identification field.
  • 16 + 3 or 16 + 4 bits may be selected in consideration of the maximum number of terminals (16 powers of 2) that a base station or a cell in the base station will accommodate. It can also be configured by assignment.
  • 16 or 16 bits may be allocated. .
  • a tunnel using the new tunnel endpoint identification field may configure header fields used in the GTP tunnels of the prior art differently.
  • header fields on the GTP tunnel of the prior art may be removed, separate ranges or definitions of other field values, or new fields may be added and used.
  • a new value other than the existing value (0, 1, 2) can be assigned to the version information on the tunnel header.
  • IPSEC any tunnel such as IPSEC, one of the above-described information may be used as the tunnel endpoint identification information on the tunnel header.
  • Dynamic configuration through UDP port information is a method of transmitting and receiving data to and from the terminal and the base station through the UDP protocol without GTP tunneling.
  • the tunnel endpoint identification (TEID) 32 bits were allocated.
  • the WLAN carrier when configuring the downlink tunnel, only the number of radio bearers to be provided to one terminal needs to be considered in the tunnel endpoint identification field. You can assign fewer bits to. Therefore, if the WLAN carrier is configured to use only the downlink as shown in FIGS. 2 and 4, the GTP protocol entity is not set in the terminal, and this is classified on the transport network layer to correspond to the layer 2 entity (PDCP) in the corresponding terminal.
  • PDCP layer 2 entity
  • a user data packet (or an E-UTRAN Layer 2 PDU or an E-UTRAN Layer 2 entity or PDCP entity or an RLC entity or any entity associated with an E-UTRAN Layer 2 entity (eg, Ux UP) or E-UTRAN Layer 2 user data) may be encapsulated with a UDP header and an IP header.
  • 8 UDP port numbers may be distinguished and used in consideration of logical channel identification information having a value between 3 and 10.
  • DRB identification information (drb-Identity) having a value between 1 and 32
  • 32 UDP port numbers may be distinguished and used.
  • eps-BearerIdentity having a value between 0 and 15
  • 16 UDP port numbers may be distinguished and used.
  • the base station transmits user data (or PDCP PDUs or RLC PDUs) belonging to a specific radio bearer received by the terminal through a WLAN carrier, separated or interworked, to a corresponding layer 2 entity (PDCP entity or RLC entity).
  • UDP port information may be included in the radio bearer configuration information DRB-ToAddMod configured to be bearer-specifiable (or for each radio bearer).
  • the UE may transmit the received user data (or PDCP PDUs or RLC PDUs) to a corresponding layer 2 entity (PDCP entity or RLC entity).
  • the E-UTRAN when a user equipment transmits user plane data by adding a WLAN carrier to an E-UTRAN carrier, the E-UTRAN is performed in units of a radio bearer through a downlink and / or uplink tunnel between the base station and the user equipment.
  • the user plane data By allowing the user plane data to be transmitted using a carrier and / or a WLAN carrier, an effect of effectively offloading the data of the E-UTRAN is effectively considered in consideration of the radio state of the terminal and the load of the base station at the RAN level.
  • FIG. 13 is a view showing the configuration of a terminal according to another embodiment of the present invention.
  • the user terminal 1300 provides higher layer signaling including indication information for requesting the establishment of a terminal tunnel protocol entity for processing data transmitted and received through a WLAN carrier.
  • a controller 1310 configured to configure a terminal tunnel protocol entity based on the receiving unit 1330 and the indication information, and to receive bearer specific user data and transmit the bearer specific user data to a corresponding terminal user plane entity.
  • the receiver 1330 may receive bearer specific downlink data including downlink tunnel endpoint identification information from the base station. Meanwhile, higher layer signaling may include downlink tunnel endpoint identification information in the radio bearer configuration information.
  • the receiver 1330 may further receive radio bearer configuration information for a radio bearer configured to transmit uplink data through a WLAN carrier through the above-described higher layer signaling.
  • the radio bearer configuration information may include at least one of transport layer address information of the base station, UDP port number, and uplink tunnel endpoint identification information.
  • control unit 1310 is a terminal required to perform the above-described present invention to transmit a specific user plane data or a specific radio bearer in the E-UTRAN layer 2 by separating or interworking user plane data unit on the E-UTRAN carrier and And / or control the overall operation of the terminal 1300 in transmitting and / or receiving user plane data over the WLAN carrier.
  • the control unit 1310 can assign downlink tunnel endpoint identification information.
  • the transmitter 1320 may transmit downlink tunnel endpoint identification information to the base station.
  • the transmitter 1320 may transmit uplink control information, data, and a message necessary for performing the above-described present invention to a base station.
  • FIG. 14 is a diagram illustrating a configuration of a base station according to another embodiment of the present invention.
  • the base station 1400 performs higher layer signaling including indication information for requesting the establishment of a terminal tunnel protocol entity for processing data transmitted and received through a WLAN carrier.
  • a control unit 1410 configured to transmit a base station tunnel protocol entity corresponding to the transmitter 1420 and the terminal tunnel protocol entity.
  • the transmitter 1420 may add downlink tunnel endpoint identification information to bearer specific downlink user data for transmission. Alternatively, the transmitter 1420 may transmit radio bearer configuration information including downlink tunnel endpoint identification information in higher layer signaling.
  • the transmitter 1420 may further transmit radio bearer configuration information for the radio bearer configured to deliver uplink data through the WLAN carrier through the above-described higher layer signaling.
  • the radio bearer configuration information may include at least one of transport layer address information of the base station, UDP port number, and uplink tunnel endpoint identification information.
  • the base station 1400 may further include a receiver 1430 for receiving downlink tunnel endpoint identification information for each radio bearer allocated by the terminal.
  • the control unit 1410 may be configured to separate or interwork with user plane data units on the E-UTRAN layer 2 in order for a terminal required to perform the above-described present invention to transmit specific user plane data or a specific radio bearer and / or an E-UTRAN carrier and / or Controls the overall operation of the base station 1400 in controlling to transmit and / or receive user plane data over the WLAN carrier.
  • the transmitter 1420 and the receiver 1430 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention.
  • the E-UTRAN may select one WLAN carrier in the E-UTRAN at the RAN level in consideration of the radio state and mobility of the UE while maintaining the E-UTRAN carrier.
  • the E-UTRAN adds WLAN carriers as one carrier in the E-UTRAN at the RAN level to transmit user plane data belonging to a particular bearer over the E-UTRAN carrier and / or WLAN carrier.
  • a method of splitting (or splitting or routing) / merge or interworking user plane data units on layer 2 may be considered.
  • the PDCP parent may separate the data to be transmitted through the E-UTRAN carrier and / or the data to be transmitted through the WLAN carrier, and may be configured to receive (or merge) the peered PDCP parent.
  • the PDCP higher entity may be configured to interwork and transmit data to be transmitted through a WLAN carrier, and the peered PDCP higher entity may receive it.
  • the PDCP entity may be configured to separate and transmit data to be transmitted through the E-UTRAN carrier and / or data to be transmitted through the WLAN carrier, and to receive (or merge) the peered PDCP entity.
  • the PDCP entity may be configured to interwork with the data to be transmitted through the WLAN carrier and receive the peered PDCP entity.
  • the RLC entity may be configured to separate and transmit data to be transmitted through the E-UTRAN carrier and / or data to be transmitted through the WLAN carrier and to receive (or merge) the peered RLC entity.
  • the RLC entity may be configured to interwork with the data to be transmitted through the WLAN carrier and receive the peered RLC entity.
  • the E-UTRAN in order for the E-UTRAN to add a WLAN carrier as one carrier in the E-UTRAN at the RAN level to initiate or terminate user plane data transmission belonging to a particular bearer via the E-UTRAN carrier and / or WLAN carrier, although a control plane procedure is required between the terminal and the terminal, a procedure for this has not been provided so far. In particular, when the terminal moves, service continuity for mobility or user plane data may not be provided according to the movement of the terminal.
  • the E-UTRAN adds WLAN carriers as one carrier in the E-UTRAN at the RAN level to start / start or terminate user plane data transmission belonging to a particular bearer over the E-UTRAN carrier and / or WLAN carrier.
  • the control plane procedure is not defined between the base station and the terminal to stop. In particular, when the terminal moves, there is a problem that cannot provide service continuity for the user plane data.
  • the present invention devised to solve this problem is that the E-UTRAN adds a WLAN carrier as one carrier in the E-UTRAN at the RAN level to transmit user plane data belonging to a specific bearer through the E-UTRAN carrier and / or WLAN carrier. It is an object of the present invention to provide a control plane procedure between a base station and a terminal for starting / starting or terminating / stopping the operation. In particular, when the terminal moves, an object of the present invention is to provide mobility effectively.
  • 15 is a diagram illustrating an example of a network configuration scenario for the present invention.
  • a WLAN AP 1530 may be constructed where a cell edge or one or more cell coverages overlap.
  • the terminal When the terminal is located where the cell coverage associated with the eNB 1 1510 and the WLAN coverage overlap, the terminal may establish an RRC connection with the eNB 1 1510 for transmission of control plane data. In addition, the terminal may configure one or more signaling radio bearers (SRBs). The eNB 1 1510 may add a WLAN carrier to the terminal for user plane data transmission and configure one or more data radio bearers (DRBs) through the E-UTRAN carrier and / or the WLAN carrier. Meanwhile, the terminal may move to the coverage of the eNB 2 1520 according to the movement. In this case, the terminal may change the cell according to the handover procedure.
  • SRBs signaling radio bearers
  • DRBs data radio bearers
  • a base station configures a radio bearer (DRB) over a WLAN carrier, or a radio bearer over an E-UTRAN carrier and a WLAN carrier may vary according to the scenarios of FIGS. 1 to 4 described above.
  • DRB radio bearer
  • an E-UTRAN carrier and a WLAN carrier may be used for uplink and downlink transmission for a specific radio bearer.
  • an E-UTRAN carrier and a WLAN carrier may be used for downlink transmission for a specific radio bearer.
  • an E-UTRAN carrier may be used for uplink transmission for a specific radio bearer.
  • the base station in order to transmit data traffic for a particular radio bearer over an E-UTRAN carrier, the base station may use conventional DRB configuration information (e.g., details elements on the DRB-ToAddMod).
  • the radio bearer through the E-UTRAN carrier can be configured in the terminal using the.
  • configuration information for configuring the additional function of transmitting and receiving through the WLAN carrier may be configured in the terminal.
  • the above-described DRB configuration information is included in a RadioResourceConfigDedicated information element.
  • the above-described radio resource configuration dedicated information is used for setup / modification / release of radio bearers, MAC main configuration modification, SPS configuration modification, or dedicated physical configuration modification.
  • WLAN carriers may be used for uplink and downlink transmission for a specific radio bearer.
  • data traffic for a specific radio bearer is not transmitted through the E-UTRAN carrier, it is necessary to configure the conventional DRB configuration information included in the RadioResourceConfigDedicated information element in the terminal. There is no. Therefore, there is a need to define new configuration information for distinguishing radio bearers transmitted through a WLAN carrier.
  • configuration information for configuring an additional function of transmitting and receiving through the WLAN carrier may be configured in the terminal.
  • the configuration information for configuring a transmission / reception function through the WLAN carrier may include WLAN cell configuration information for configuring the WLAN carrier.
  • WLAN cell configuration information includes WLAN cell identifier information, WLAN mobility set identifier information, band / frequency information, WLAN identification information (BSSID / HESSID / SSIDs), and WLAN access authentication in the cell for the WLAN cell authentication. It may include one or more of information for indicating the information and information for indicating a cell WLAN primary cell to perform data transmission through the WLAN of the WLAN cell.
  • the routing function of the transmission part and the reordering function of the reception part in an entity (eg, PDCP or RLC entity) where separation / merge occurs for each radio bearer.
  • an entity eg, PDCP or RLC entity
  • the terminal may need to access the WLAN or perform data communication through the WLAN between the terminal and the base station.
  • the terminal (or base station) that receives the user plane data transmitted through the WLAN from the layer 2 entity of each radio bearer in the base station (or terminal) may transmit the user plane data to the layer 2 of the radio bearer. You may need to configure it to map to an object.
  • the base station may transmit the WLAN radio resource configuration information for establishing data transmission and reception using the WLAN carrier to the terminal.
  • the WLAN radio resource configuration dedicated information may include information necessary for the terminal to transmit and receive data of a specific radio bearer through a WLAN carrier.
  • the WLAN radio resource configuration dedicated information may indicate bearer configuration information or to indicate a routing function of a transmitting part and a reordering function of a receiving part in an entity (eg, PDCP or RLC entity) where separation / merge occurs.
  • the layer 2 object configuration information may include information for indicating this.
  • bearer type identification information may be included.
  • the detailed information element for indicating this may be included in the corresponding layer-2 object configuration information. Since such information corresponds to radio bearer specific information, it may be included in radio resource configuration dedicated information.
  • the WLAN radio resource configuration dedicated information may include WLAN cell configuration information for configuring a WLAN carrier to which the terminal will transmit data of a specific radio bearer.
  • WLAN cell configuration information includes WLAN cell identifier information, WLAN mobility set identifier information, band / frequency information, WLAN identification information (BSSID / HESSID / SSIDs), and WLAN access authentication in the cell for the WLAN cell authentication. It may include one or more of information for indicating the information and information for indicating a cell WLAN primary cell to perform data transmission through the WLAN of the WLAN cell.
  • WLAN radio resource configuration-specific information for the terminal to access the WLAN AP and / or to configure data communication through the WLAN carrier between the terminal and the base station may include WLAN identification information (eg, SSID, BSSID, HESSID), encryption algorithm information, and keys. (key) may include one or more of the information. Since the above-described WLAN radio resource configuration-only information is applied only to a radio bearer group using transmission on a WLAN carrier, radio resource configuration for a radio bearer group using transmission on a WLAN carrier distinguished from conventional radio resource configuration-only information. Dedicated information (for example, denoted as RadioResourceConfigDedicatedWLAN) may be defined and used. The above-described RadioResourceConfigDedicatedWLAN is for referring to radio resource configuration-only information for a group of radio bearers using transmission through a WLAN carrier, which is divided into conventional radio resource configuration-only information. It is not limited to the name.
  • RadioResourceConfigDedicatedWLAN is for referring to radio resource configuration-only information for a group of radio bearers using transmission through a WLAN
  • the bearer configuration information or the corresponding layer 2 may include information for indicating this.
  • tunnel configuration information may be included.
  • identification information for mapping the layer 2 PDU or information or header information to be encapsulated in the layer 2 PDU to map the layer 2 PDU may be included.
  • the above-described information for indicating, identification information, information to be encapsulated, or header information corresponds to radio bearer specific information, and thus may be included in radio resource configuration dedicated information.
  • the above-mentioned information for indicating, identification information, or information to be encapsulated or header information is applied only to a group of radio bearers using a transmission through a WLAN carrier, so that transmission through a WLAN carrier distinguished from conventional radio resource configuration information is performed. It may be included in the WLAN radio resource configuration information for the radio bearer group to be used.
  • the additional function of transmitting and receiving through a WLAN carrier in the scenario as shown in FIG. It may be necessary.
  • a terminal for receiving user plane data transmitted through a WLAN carrier from a layer 2 entity of each radio bearer in a base station may map user plane data to a layer 2 entity of a corresponding radio bearer. This may be necessary.
  • information for indicating this may be included in the bearer configuration information or the corresponding layer 2 entity configuration information.
  • bearer type identification information may be included.
  • the detailed information element for indicating this may be included in the corresponding layer-2 object configuration information. Since the above information corresponds to radio bearer specific information, it may be included in radio resource configuration dedicated information.
  • WLAN radio resource configuration-specific information for the terminal to access the WLAN AP and / or to configure data communication through the WLAN carrier between the terminal and the base station may include WLAN identification information (eg, SSID, BSSID, HESSID), encryption algorithm information, and keys. (key) may include one or more of the information. Since the above-described WLAN radio resource configuration-only information is applied only to a radio bearer group using transmission on a WLAN carrier, radio resource configuration for a radio bearer group using transmission on a WLAN carrier distinguished from conventional radio resource configuration-only information. Dedicated information (for example, denoted as RadioResourceConfigDedicatedWLAN) may be defined and used.
  • the bearer configuration information or the corresponding layer 2 may include information for indicating this.
  • tunnel configuration information may be included.
  • identification information for mapping the layer 2 PDU or information or header information to be encapsulated in the layer 2 PDU to map the layer 2 PDU may be included.
  • the above-described information for indicating, identification information, information to be encapsulated, or header information corresponds to radio bearer specific information, and thus may be included in radio resource configuration dedicated information.
  • the above-mentioned information for indicating, identification information, or information to be encapsulated or header information is applied only to a group of radio bearers using a transmission through a WLAN carrier, so that transmission through a WLAN carrier distinguished from conventional radio resource configuration information is performed. It may be included in the WLAN radio resource configuration information for the radio bearer group to be used.
  • the terminal may need to access the WLAN and / or perform data communication through the WLAN carrier between the terminal and the base station.
  • the terminal (or base station) that has received the user plane data transmitted through the WLAN from the layer 2 entity of each radio bearer in the base station (or terminal) may transmit the user plane data to the layer 2 of the radio bearer. You may need to configure it to map to an object.
  • WLAN radio resource configuration-specific information for the terminal to access the WLAN AP and / or to configure data communication through the WLAN carrier between the terminal and the base station may include WLAN identification information (eg, SSID, BSSID, HESSID), encryption algorithm information, and keys. (key) may include one or more of the information. Since the above-described WLAN radio resource configuration-only information is applied only to a radio bearer group using transmission on a WLAN carrier, radio resource configuration for a radio bearer group using transmission on a WLAN carrier distinguished from conventional radio resource configuration-only information. Dedicated information (for example, denoted as RadioResourceConfigDedicatedWLAN) may be defined and used.
  • the bearer configuration information or the corresponding layer 2 may include information for indicating this.
  • bearer configuration information or the corresponding The layer 2 configuration information may include information for indicating this.
  • tunnel configuration information may be included.
  • identification information for mapping the layer 2 PDU or information or header information to be encapsulated in the layer 2 PDU to map the layer 2 PDU may be included. Since this information applies only to a group of radio bearers using transmission on a WLAN carrier, it is included in the WLAN radio resource configuration only information for a group of radio bearers using transmission on a WLAN carrier that is distinct from conventional radio resource configuration information. Can be.
  • the additional function of transmitting / receiving through the WLAN carrier in the scenario as shown in FIG. 4, it may be necessary for the terminal to access the WLAN and / or perform data communication through the WLAN carrier between the terminal and the base station.
  • a terminal for receiving user plane data transmitted through a WLAN from a layer 2 entity of each radio bearer in a base station needs to configure a user plane data to map to a layer 2 entity of a corresponding radio bearer. Can be.
  • WLAN radio resource configuration-specific information for the terminal to access the WLAN and / or to configure data communication through the WLAN carrier between the terminal and the base station may include WLAN identification information (eg, SSID, BSSID, HESSID), encryption algorithm information, and key ( key) information may include one or more pieces of information. Since this information applies only to a group of radio bearers using transmission on a WLAN carrier, it can be included in WLAN radio resource configuration dedicated information for a group of radio bearers using transmission on a WLAN carrier which is distinguished from conventional radio resource configuration only information. have.
  • the bearer configuration information or the corresponding layer 2 may include information for indicating this.
  • tunnel configuration information may be included.
  • identification information for mapping the layer 2 PDU or information or header information to be encapsulated in the layer 2 PDU to map the layer 2 PDU may be included.
  • the above-described information for indicating, identification information, information to be encapsulated, or header information corresponds to radio bearer specific information, and thus may be included in radio resource configuration dedicated information.
  • the above-mentioned information for indicating, identification information, or information to be encapsulated or header information is applied only to a group of radio bearers using a transmission through a WLAN carrier, so that transmission through a WLAN carrier distinguished from conventional radio resource configuration information is performed. It may be included in the WLAN radio resource configuration information for the radio bearer group to be used.
  • the terminal and the base station of the present invention may define and use WLAN radio resource configuration information according to each scenario of FIGS. 1 to 4 in order to transmit and receive data using a WLAN carrier.
  • the WLAN radio resource configuration dedicated information may include configuration information for a radio bearer group including one or more radio bearers configured to transmit and receive data using a WLAN carrier.
  • the WLAN radio resource configuration dedicated information may include WLAN cell configuration information such as various indication information, identification information, tunnel information, encryption information, key information, and WLAN according to each scenario. It may include radio bearer configuration information.
  • the base station may set up an additional function of transmitting and receiving through the WLAN carrier and the terminal to access the WLAN AP and / or perform data communication through the WLAN carrier between the terminal and the base station.
  • the terminal may receive WLAN radio resource configuration information including information for setting or instructing the terminal to access the WLAN AP and / or perform data communication through the WLAN carrier between the terminal and the base station.
  • the terminal receives an RRC Connection Reconfiguration message including the WLAN radio resource configuration information
  • the terminal accesses / accesses authentication / tunnel setup and / or performs data communication through the WLAN carrier between the terminal and the base station. You can set the object / layer / function.
  • the terminal may transmit an RRC connection reconfiguration complete message to the base station.
  • the terminal may try to access / access authentication / tunnel setup through the WLAN AP and / or data communication through the WLAN carrier between the terminal and the base station to inform the base station of the success or failure of the access / access authentication / data communication through the WLAN carrier.
  • the UE may send it to the base station.
  • the failure on the WLAN radio link may indicate that the terminal is in a state where the WLAN radio link quality (e.g., beacon RSSI, channel utilization, backhaul rate, WLAN signal strength) is lower than a certain threshold, or the WLAN radio link quality is lower than a certain threshold. Persisting for some time, not receiving feedback for WLAN transmissions for some time, detecting a certain number of losses in feedback for WLAN transmissions, failing WLAN connection authentication, or failing for a certain time for WLAN connection authentication; And when one or more states of failure to succeed in WLAN tunnel setup for some time / attempt occur.
  • the WLAN radio link quality e.g., beacon RSSI, channel utilization, backhaul rate, WLAN signal strength
  • the success or failure of the UE accessing the WLAN AP or data communication through the WLAN carrier to the base station may be performed before, after, or simultaneously with the above-described RRC connection reconfiguration complete message.
  • the terminal since the terminal has mobility, as described with reference to FIG. This is called a handover of the terminal, and when the terminal performs handover, transmission and reception of data through the WLAN carrier may be maintained or released. Therefore, hereinafter, data processing through the WLAN carrier in the handover procedure of the terminal will be described.
  • the handover procedure will be described when the terminal of the present invention moves from a base station eNB1 coverage and a WLAN coverage overlap to another base station eNB2 coverage and the aforementioned WLAN coverage.
  • a base station in which a terminal currently maintains an RRC connection is described as a base station or a source base station, and a base station in which the terminal moves to perform RRC connection is described as a target base station.
  • the source base station determines the handover of the terminal based on the measurement report and the RRM information
  • the source base station transmits a HANDOVER REQUEST message to the target base station including information necessary to prepare for handover on the target base station side. do.
  • the handover request message includes a handover preparation information (HandoverPreparationInformation) message.
  • the handover preparation information message includes an AS-Config information element (IE).
  • the AS-Config IE relates to RRC configuration information (or RRC Context) in the source base station, and may be used by the target base station to determine the need to change the RRC configuration during the handover preparation phase.
  • the AS-Config IE information may be used after the handover is successfully performed or during the RRC connection re-establishment.
  • the As-Config IE includes only radio resource configuration information as a radio resource configuration information of a source base station, so that the target base station uses transmission on a WLAN carrier.
  • a WLAN carrier could not receive configuration information (e.g., WLAN radio resource configuration information described above or radio bearer configuration information or WLAN cell configuration information using a WLAN carrier), and thus radio using transmission over a WLAN carrier.
  • configuration information e.g., WLAN radio resource configuration information described above or radio bearer configuration information or WLAN cell configuration information using a WLAN carrier.
  • the present invention provides a WLAN radio of a group of radio bearers using AS-Config IE transmission over a WLAN carrier that is distinct from the conventional RadioResourceConfigDedicated to ensure continuity of data transmission and reception through a WLAN carrier.
  • Resource configuration-only information eg, RadioResourceConfigDedicatedWLAN
  • RadioResourceConfigDedicatedWLAN may be included.
  • the present invention may include the WLAN measurement result in the above-described AS-Config IE.
  • the above-described AS-Config IE may include the measurement result of the E-UTRAN serving cell.
  • the above-described AS-Config IE may include measurement configuration information for WLAN measurement.
  • WLAN wireless measurement is different from the conventional E-UTRAN measurement configuration in the measurement channel and measurement signal.
  • the WLAN measurement configuration information may include one or more pieces of information included in the WLAN offload configuration information (WLAN-OffloadConfig) or one or more pieces of WLAN information (for example, WLAN channel utilization rate (BSS load) and up / down backhaul bandwidth (backhaul).
  • the WLAN measurement configuration may be configured to measure the channel load for determining the WLAN channel to be used by the terminal through a method other than the BSS LOAD method using a WLAN beacon (for example, an energy detection method). have. Therefore, the measurement configuration for WLAN measurement can be set using other measurement configuration information distinguished from the existing measurement configuration (measconfig), in which case it can be included in the AS-Config IE.
  • the measurement configuration information for the WLAN measurement described above may be included in the RRM-Config IE.
  • the WLAN measurement configuration information included in the RRM-Config IE may include one or more pieces of information included in the WLAN offload configuration information (WLAN-OffloadConfig) or one or more WLAN information based thereon (for example, WLAN channel utilization rate (BSS load). ), Up / down backhaul bandwidth (backhaul bandwidth), Offload PreferenceIndicator, RCPI, beacon RSSI, WLAN identification information (BSSID / HESSID / SSIDs), WLAN band, may include one or more of the WLAN frequency.
  • WLAN-OffloadConfig the WLAN offload configuration information included in the RRM-Config IE may include one or more pieces of information included in the WLAN offload configuration information (WLAN-OffloadConfig) or one or more WLAN information based thereon (for example, WLAN channel utilization rate (BSS load). ), Up / down backhaul bandwidth (backhaul bandwidth), Offload PreferenceIndicator, RCPI, beacon RSS
  • the base station may select and transmit WLAN channel information to be changed by the radio bearer using the WLAN carrier to the terminal through the WLAN channel utilization rate (BSS load) included in the measurement report received from the terminal or the load information of the WLAN channel.
  • the base station may allow the terminal to select an appropriate WLAN channel during the WLAN connection process, without having to send WLAN channel information to the terminal.
  • the target base station may be used to add, modify, or release radio resource configuration through the WLAN carrier in the handover execution phase, the handover completion phase, or after the handover.
  • the target base station may instruct the terminal to release the entire WLAN carrier configuration described above through a handover message.
  • the configured WLAN cell may be released.
  • it may release a configured WLAN cell and a WLAN bearer associated with that WLAN cell.
  • the target base station may include information in the handover message to instruct the terminal to release the entire WLAN carrier configuration described above.
  • the target base station upon receiving the WLAN radio resource configuration-specific information for the radio bearer group using the transmission through the WLAN carrier through the source base station, instructs the terminal to release the aforementioned entire WLAN carrier configuration in a handover message. May contain information.
  • a radio bearer that has been transmitted through a conventional WLAN carrier may be transmitted through an E-UTRAN carrier.
  • the target base station releases the radio bearer transmitted by the terminal through the WLAN carrier in the handover message, and adds / modifies the released radio bearer to the radio bearer configuration information (DRB-ToAddMod) through the base station carrier. It may include configuration information for indicating.
  • the target base station may include information for instructing the mobile station to add / modify the radio bearer transmitted through the WLAN carrier to the conventional radio bearer configuration information (DRB-ToAddMod) through the base station carrier in the handover message. It may be.
  • a WLA bearer for example, a WLAN switch bearer configured through an IPsec tunnel
  • transmitting downlink or uplink data only through a WLAN carrier as shown in FIG. It may include information for instructing to switch / modify / change the radio bearer transmitted / received through the WLAN carrier to the radio bearer through the base station carrier associated with the WLAN carrier radio bearer.
  • the target base station may instruct the terminal to release the entire WLAN carrier configuration described above through a handover message.
  • the configured WLAN cell may be released.
  • it may release the configured WLAN cell and the WLAN bearer associated with that WLAN cell.
  • the target base station may include information in the handover message to instruct the terminal to release the entire WLAN carrier configuration described above.
  • the target base station may be able to add / set / reset / modify / change the WLAN carrier configuration through the same handover message.
  • the radio bearer that has been transmitted through the conventional WLAN carrier may be transmitted through the WLAN carrier.
  • the target base station may include information for instructing the terminal to maintain the radio bearer transmitted through the WLAN carrier in the handover message.
  • the target base station may include information for instructing setting / resetting / modification / change of the radio bearer transmitted by the terminal through the WLAN carrier in the handover message.
  • the layer 2 entity (eg, PDCP entity or RLC entity) of the radio bearer transmitting on the WLAN carrier may be reset according to handover.
  • the Layer 2 entity (eg, PDCP entity or RLC entity) of the radio bearer transmitting on the WLAN carrier may be reconfigured to maintain the entity without resetting upon handover.
  • the target base station may instruct the terminal to maintain the aforementioned WLAN carrier configuration through a handover message.
  • the target base station may include information for instructing the terminal to maintain the aforementioned WLAN carrier configuration in the handover message.
  • the target base station may instruct the terminal to configure the above-described WLAN carrier configuration through a handover message.
  • the target base station may include information for instructing the terminal to set / maintain the aforementioned WLAN carrier configuration in the handover message.
  • the target base station may instruct the terminal to reset the aforementioned WLAN carrier configuration through a handover message.
  • the target base station may include information for instructing the terminal to reset the WLAN carrier configuration described above in the handover message.
  • the radio bearer that has been transmitted through the conventional WLAN carrier may allow transmission to be maintained through the WLAN carrier.
  • the target base station may include information for instructing the terminal to maintain the radio bearer transmitted through the WLAN carrier in the handover message.
  • the target base station may include information for instructing setting / resetting of the radio bearer transmitted by the terminal through the WLAN carrier in the handover message.
  • the layer 2 entity (eg, PDCP entity or RLC entity) of the radio bearer transmitting on the WLAN carrier may be reset according to handover.
  • the Layer 2 entity (eg, PDCP entity or RLC entity) of the radio bearer transmitting over the WLAN carrier may be reconfigured to maintain the entity without resetting upon handover.
  • the E-UTRAN adds a WLAN carrier as one carrier in the E-UTRAN at the RAN level to perform user plane data transmission belonging to a specific bearer through the E-UTRAN carrier and / or WLAN carrier.
  • the control plane configuration information for performing can be provided. In particular, when the terminal moves, there is an effect that can continuously service the user plane data transmitted through the WLAN carrier.
  • 17 is a view for explaining the operation of the terminal according to an embodiment of the present invention.
  • a terminal includes receiving one or more WLAN radio resource configuration information for establishing data transmission and reception using a WLAN carrier from the base station, and includes one or more radio bearers based on the WLAN radio resource configuration exclusive information. And setting the radio bearer group to transmit and receive data through the WLAN carrier, and transmitting and receiving data of the radio bearer group through the WLAN carrier.
  • the terminal may include receiving WLAN radio resource configuration information for setting data transmission / reception using a WLAN carrier from the base station (S1710).
  • the WLAN radio resource configuration dedicated information may include at least one of WLAN identification information, encryption algorithm information, and key information.
  • the WLAN radio resource configuration dedicated information may be configured to instruct a terminal that receives user plane data transmitted through a WLAN carrier from a layer 2 entity of each radio bearer in a base station to map user plane data to a layer 2 entity of a corresponding radio bearer.
  • the bearer configuration information or the corresponding layer 2 configuration information may include information for indicating this.
  • the WLAN radio resource configuration dedicated information may include tunnel configuration information.
  • the WLAN radio resource configuration dedicated information may include identification information for mapping the corresponding layer 2 PDU or information or header information to be encapsulated in the corresponding layer 2 PDU to map the layer 2 PDU.
  • the WLAN radio resource configuration dedicated information may be information set separately from radio resource configuration dedicated information of a radio bearer that transmits and receives data using a base station carrier.
  • the terminal may include setting a radio bearer group including one or more radio bearers to transmit / receive data through the WLAN carrier based on the WLAN radio resource configuration-dedicated information (S1720).
  • the radio bearer group includes one or more radio bearers for transmitting and receiving data with a base station using a WLAN carrier.
  • the terminal may be configured to transmit and receive data to the corresponding radio bearer using the WLAN carrier using the radio bearer configuration information included in the WLAN radio resource configuration dedicated information.
  • the terminal may include transmitting and receiving data of the radio bearer group through the WLAN carrier (S1730).
  • the terminal may transmit / receive data of the corresponding radio bearer group with the base station through the set WLAN carrier. According to each scenario described in FIGS. 1 to 4, the terminal may transmit or receive data through a WLAN carrier.
  • the base station may transmit WLAN measurement information and WLAN radio resource configuration dedicated information to the target base station.
  • the WLAN radio resource configuration dedicated information transmitted to the target base station may be included in the handover request message and transmitted.
  • the target base station may release the WLAN radio resource configuration and configure the data of the radio bearer group to be transmitted and received using the base station carrier.
  • FIG. 18 is a diagram for explaining an operation of a base station according to another embodiment of the present invention.
  • a base station includes the steps of generating WLAN radio resource configuration dedicated information for setting data transmission and reception using a WLAN carrier, transmitting WLAN radio resource configuration exclusive information to the terminal and at least one radio bearer. And transmitting and receiving data of the radio bearer group through the WLAN carrier, wherein the WLAN radio resource configuration only information may include information for setting the radio bearer group to transmit and receive data through the WLAN carrier.
  • the base station of the present invention may include generating WLAN radio resource configuration information for setting data transmission and reception using a WLAN carrier (S1810).
  • the WLAN radio resource configuration dedicated information may include information for setting the radio bearer group to transmit and receive data through the WLAN carrier.
  • the WLAN radio resource configuration dedicated information may include at least one of WLAN identification information, encryption algorithm information, and key information.
  • the WLAN radio resource configuration dedicated information may be configured to instruct a terminal that receives user plane data transmitted through a WLAN carrier from a layer 2 entity of each radio bearer in a base station to map user plane data to a layer 2 entity of a corresponding radio bearer.
  • the bearer configuration information or the corresponding layer 2 configuration information may include information for indicating this.
  • the WLAN radio resource configuration dedicated information may include tunnel configuration information.
  • the WLAN radio resource configuration dedicated information may include identification information for mapping the corresponding layer 2 PDU or information or header information to be encapsulated in the corresponding layer 2 PDU to map the layer 2 PDU.
  • the WLAN radio resource configuration dedicated information may be information set separately from radio resource configuration dedicated information of a radio bearer that transmits and receives data using a base station carrier.
  • the base station may include transmitting the WLAN radio resource configuration dedicated information to the terminal (S1820).
  • the base station may transmit the information on the radio bearer group configured to transmit and receive data using the WLAN carrier to the terminal through the WLAN radio resource configuration dedicated information.
  • the terminal may set the wireless bearer group including one or more wireless bearers to transmit and receive data through the WLAN carrier by using the received WLAN radio resource configuration dedicated information.
  • the base station may include transmitting and receiving data of a group of radio bearers including one or more radio bearers through a WLAN carrier (S1830).
  • the base station may transmit and receive data using the WLAN carrier and the terminal through a radio bearer belonging to the radio bearer group.
  • the base station may transmit or receive data through a WLAN carrier.
  • the terminal 1300 of the present invention is based on the reception unit 1330 and WLAN radio resource configuration-dedicated information for receiving the WLAN radio resource configuration-dedicated information for setting up data transmission and reception using the WLAN carrier from the base station.
  • the controller 1310 may include a controller 1310 configured to transmit and receive data through a WLAN carrier for a group of wireless bearers including one or more radio bearers, and a transmitter 1320 for transmitting data of a group of wireless bearers through a WLAN carrier.
  • the WLAN radio resource configuration-dedicated information received by the receiver 1330 may include at least one of WLAN identification information, encryption algorithm information, and key information.
  • the WLAN radio resource configuration dedicated information may be configured to instruct a terminal that receives user plane data transmitted through a WLAN carrier from a layer 2 entity of each radio bearer in a base station to map user plane data to a layer 2 entity of a corresponding radio bearer.
  • the bearer configuration information or the corresponding layer 2 configuration information may include information for indicating this.
  • the WLAN radio resource configuration dedicated information may include tunnel configuration information.
  • the WLAN radio resource configuration dedicated information may include identification information for mapping the corresponding layer 2 PDU or information or header information to be encapsulated in the corresponding layer 2 PDU to map the layer 2 PDU.
  • the WLAN radio resource configuration dedicated information may be information set separately from radio resource configuration dedicated information of a radio bearer that transmits and receives data using a base station carrier.
  • the receiver 1330 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • control unit 1310 the E-UTRAN required to carry out the present invention described above is added to the WLAN as one carrier in the E-UTRAN at the RAN level to belong to a specific bearer via the E-UTRAN carrier and / or WLAN carrier Controls the overall operation of the terminal 1300 according to providing control plane configuration information for performing user plane data transmission.
  • the transmitter 1330 transmits uplink control information, data, and a message to a base station through a corresponding channel.
  • the base station may transmit WLAN measurement information and WLAN radio resource configuration information to the target base station.
  • the WLAN radio resource configuration dedicated information transmitted to the target base station may be included in the handover request message and transmitted.
  • the target base station may release the WLAN radio resource configuration and configure the data of the radio bearer group to be transmitted and received using the base station carrier.
  • the base station 1400 of the present invention transmits a control unit 1410 for generating WLAN radio resource configuration dedicated information for establishing data transmission and reception using a WLAN carrier and WLAN radio resource configuration dedicated information to the terminal.
  • the receiver 1430 may include a receiver 1430 that receives data of a group of radio bearers including a transmitter 1420 and one or more radio bearers through a WLAN carrier.
  • the WLAN radio resource configuration dedicated information may include at least one of WLAN identification information, encryption algorithm information, and key information.
  • the WLAN radio resource configuration dedicated information may be configured to instruct a terminal that receives user plane data transmitted through a WLAN carrier from a layer 2 entity of each radio bearer in a base station to map user plane data to a layer 2 entity of a corresponding radio bearer.
  • the bearer configuration information or the corresponding layer 2 configuration information may include information for indicating this.
  • the WLAN radio resource configuration dedicated information may include tunnel configuration information.
  • the WLAN radio resource configuration dedicated information may include identification information for mapping the corresponding layer 2 PDU or information or header information to be encapsulated in the corresponding layer 2 PDU to map the layer 2 PDU.
  • the WLAN radio resource configuration dedicated information may be information set separately from radio resource configuration dedicated information of a radio bearer that transmits and receives data using a base station carrier.
  • the control unit 1410 is a user plane belonging to a specific bearer through the E-UTRAN carrier and / or WLAN carrier by the E-UTRAN required to carry out the above-described present invention to add the WLAN as one carrier in the E-UTRAN at the RAN level Controls the overall operation of the base station 1400 according to providing control plane configuration information for performing data transmission.
  • the transmitter 1420 may transmit WLAN measurement information and WLAN radio resource configuration information to the target base station.
  • the WLAN radio resource configuration dedicated information transmitted to the target base station may be included in the handover request message and transmitted.
  • the target base station may release the WLAN radio resource configuration and configure the data of the radio bearer group to be transmitted and received using the base station carrier.
  • the transmitter 1420 and the receiver 1430 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention.

Abstract

La présente invention concerne un procédé et un appareil de traitement de données de plan utilisateur par l'ajout d'un réseau local sans fil (WLAN) à une porteuse E-UTRAN à un niveau d'un réseau d'accès radio (RAN). En particulier, la présente invention concerne un procédé et un appareil de traitement de données par un terminal, le procédé comprenant les étapes consistant : à recevoir une signalisation de couche supérieure comprenant des informations d'indication demandant la configuration d'une entité terminale de protocole de tunnel pour le traitement de données transmises/reçues par l'intermédiaire d'une porteuse WLAN ; à configurer l'entité terminale de protocole de tunnel sur la base des informations d'indication ; et à recevoir des données utilisateur spécifiques au support et à transmettre les données utilisateurs spécifique au support à une entité terminale de plan utilisateur correspondant à ces dernières.
PCT/KR2015/010391 2014-10-02 2015-10-01 Procédé de traitement de données à l'aide d'une porteuse wlan et appareil correspondant WO2016053027A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580053056.6A CN106717060B (zh) 2014-10-02 2015-10-01 用于使用wlan载波处理数据的方法及其装置
US15/516,065 US10736175B2 (en) 2014-10-02 2015-10-01 Method for processing data using WLAN carrier and apparatus therefor

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
KR10-2014-0133252 2014-10-02
KR20140133252 2014-10-02
KR10-2014-0144476 2014-10-23
KR20140144476 2014-10-23
KR10-2015-0125253 2015-09-04
KR1020150125253A KR20160040419A (ko) 2014-10-02 2015-09-04 Wlan 캐리어를 이용한 데이터 처리 방법 및 그 장치
KR10-2015-0136064 2015-09-25
KR1020150136064A KR101985991B1 (ko) 2014-10-23 2015-09-25 데이터 송수신 방법 및 그 장치

Publications (1)

Publication Number Publication Date
WO2016053027A1 true WO2016053027A1 (fr) 2016-04-07

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PCT/KR2015/010391 WO2016053027A1 (fr) 2014-10-02 2015-10-01 Procédé de traitement de données à l'aide d'une porteuse wlan et appareil correspondant

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Country Link
WO (1) WO2016053027A1 (fr)

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