WO2017196106A1 - Procédé pour interfonctionnement entre des réseaux d'accès radio hétérogènes et appareil associé - Google Patents

Procédé pour interfonctionnement entre des réseaux d'accès radio hétérogènes et appareil associé Download PDF

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Publication number
WO2017196106A1
WO2017196106A1 PCT/KR2017/004894 KR2017004894W WO2017196106A1 WO 2017196106 A1 WO2017196106 A1 WO 2017196106A1 KR 2017004894 W KR2017004894 W KR 2017004894W WO 2017196106 A1 WO2017196106 A1 WO 2017196106A1
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WIPO (PCT)
Prior art keywords
base station
flow
radio
core network
lte
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PCT/KR2017/004894
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English (en)
Korean (ko)
Inventor
김하성
Original Assignee
주식회사 케이티
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Publication date
Priority claimed from KR1020170055128A external-priority patent/KR102172469B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to US16/092,471 priority Critical patent/US11096091B2/en
Publication of WO2017196106A1 publication Critical patent/WO2017196106A1/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
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H04W28/12—Flow control between communication endpoints using signalling between network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the present embodiments relate to a method and apparatus for interworking between heterogeneous radio access networks, and more particularly, to a method and apparatus for interworking between 5G and LTE / LTE-Advanced radio access networks.
  • the existing LTE / LTE-Advanced wireless access network uses the EPS bearer as a basic unit to perform QoS control at the bearer level. Therefore, in the core network, a plurality of traffic flows are mapped to EPS bearers, and QoS parameters of the bearer level are allocated to the radio access network. Accordingly, the radio access network performs radio bearer control and QoS control of the corresponding level.
  • the existing bearer level QoS control scheme is provided to provide more flexible and detailed services with various transmission speed, reliability, latency requirements and QoS characteristics based on network slicing technology. More granular flow-based packet control will also be introduced.
  • the conventional bearer packet control based 5G and the LTE / LTE-Advanced base station interworking method is insufficient support for the flow control consideration is necessary.
  • natural interworking with existing LTE / LTE-Advanced wireless access networks will be very important to provide stable services.
  • An object of the present embodiments is to provide a method and apparatus for interworking between 5G and LTE / LTE-Advanced radio access network on a 5G network capable of flow packet-based QoS control for providing various packet QoS.
  • embodiments of the present invention provide a method for interworking between heterogeneous radio access networks, in which a master base station receives a quality of service policy from a core network connected to a master base station and a secondary base station, and receives one or more packet flows from the core network. And mapping one or more packet flows to at least one of a radio flow and a radio bearer based on the quality of service policy.
  • the embodiments of the present invention provide a method for interworking between heterogeneous radio access networks, the terminal transmitting a packet flow to a core network, and mapping between the packet flow and the radio bearer based on a flow identifier assigned by the core network. Receiving a message from the master base station or the secondary base station performing the step, and transmitting a message including the flow identifier and the bearer identifier to the core network.
  • the terminal for the connection with the master base station transmits a connection request message to the core network, and assigned by the core network
  • a method comprising the steps of: receiving a connection reestablishment message from a secondary base station that performs a mapping between a flow and a radio bearer based on a flow identifier, and transmitting a connection reestablishment complete message to the secondary base station.
  • the flow packet-based 5G and LTE / LTE-Advanced base station interworking enables to provide more flexible and detailed services having various requirements and QoS characteristics of 5G.
  • FIG. 1 is a diagram illustrating a case where a 5G radio access network is a master base station in a core and a radio access network structure when 5G and LTE / LTE-Advanced interworking.
  • FIG. 2 is a diagram illustrating a case where an LTE / LTE-Advanced radio access network is a master base station in a core and a radio access network structure when 5G and LTE / LTE-Advanced interwork.
  • FIG. 3 is a diagram illustrating an example of a process for interworking between heterogeneous wireless access networks according to the present embodiments.
  • FIG. 4 is a diagram illustrating another example of a method of interworking between heterogeneous wireless access networks according to the present embodiments.
  • FIG. 5 is a diagram illustrating an example of an initial connection establishment procedure in a method of interworking between heterogeneous wireless access networks according to the present embodiments.
  • FIG. 6 is a diagram illustrating a configuration of a base station according to the present embodiments.
  • FIG. 7 is a diagram illustrating a configuration of a user terminal according to the present embodiments.
  • the MTC terminal may mean a terminal supporting low cost (or low complexity) or a terminal supporting coverage enhancement.
  • the MTC terminal may mean a terminal supporting low cost (or low complexity) and coverage enhancement.
  • the MTC terminal may mean a terminal defined in a specific category for supporting low cost (or low complexity) and / or coverage enhancement.
  • the MTC terminal may mean a newly defined 3GPP Release-13 low cost (or low complexity) UE category / type for performing LTE-based MTC related operations.
  • the MTC terminal supports enhanced coverage compared to the existing LTE coverage, or supports UE category / type defined in the existing 3GPP Release-12 or lower, or newly defined Release-13 low cost (or lower power consumption).
  • low complexity can mean UE category / type.
  • the wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data, and the like.
  • the wireless communication system includes a user equipment (UE) and a base station (base station, BS, or eNB).
  • a user terminal is a generic concept meaning a terminal in wireless communication.
  • user equipment (UE) in WCDMA, LTE, and HSPA, as well as mobile station (MS) in GSM, user terminal (UT), and SS It should be interpreted as a concept that includes a subscriber station, a wireless device, and the like.
  • a base station or cell generally refers to a station that communicates with a user terminal, and includes a Node-B, an evolved Node-B, an eNB, 5G, a sector, and a site. Other terms such as Site, Base Transceiver System (BTS), Access Point, Access Node, Relay Node, Remote Radio Head (RRH), Radio Unit (RU), and small cell may be referred to.
  • BTS Base Transceiver System
  • RRH Remote Radio Head
  • RU Radio Unit
  • a base station or a cell includes some areas or functions covered by a base station controller (BSC) in CDMA, a Node-B in WCDMA, an eNB or sector (site) in LTE, a gNB in 5G, and the like. It should be interpreted in a comprehensive sense, which encompasses various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, RRH, RU, and 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.
  • the base station is collectively referred to as a mega cell, a macro cell, a micro cell, a pico cell, a femto cell, a small cell, an RRH, an antenna, an RU, a low power node (LPN), a point, an eNB, a gNB, a transmission / reception point, a transmission point, and a reception point.
  • LPN low power node
  • 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 high transmission power or a low transmission power in a macro cell region, which is connected to an eNB or a macro cell (hereinafter referred to as an 'eNB') and wired controlled by an optical cable or an optical fiber to an eNB. May be RRH.
  • downlink refers to a communication or communication path from a multiple transmission / reception point to a terminal
  • uplink refers to a communication or communication path from a terminal to multiple transmission / reception points.
  • a transmitter may be part of multiple transmission / reception points, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.
  • a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH may be described in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH.
  • a description of transmitting or receiving a PDCCH or transmitting or receiving a signal through the PDCCH may be used as a meaning including transmitting or receiving an EPDCCH or transmitting or receiving a signal through the EPDCCH.
  • the physical downlink control channel described below may mean PDCCH or EPDCCH, and may also be used to include both PDCCH and EPDCCH.
  • the EPDCCH which is an embodiment of the present invention, may be applied to the portion described as the PDCCH, and the PDCCH may be applied to the portion described as the EPDCCH as an embodiment of the present invention.
  • high layer signaling described below includes RRC signaling for transmitting RRC information including an RRC parameter.
  • the eNB performs downlink transmission to the terminals.
  • the eNB includes downlink control information and an uplink data channel (eg, a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and scheduling required to receive the PDSCH.
  • a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) may be transmitted.
  • PUSCH physical uplink shared channel
  • the background technology of the present invention is a 5G network, a radio flow control, a radio access network, and an interworking technology between 5G and LTE / LTE-Advanced.
  • An object of the present invention is to provide a method and apparatus for interworking between 5G and LTE / LTE-Advanced radio access networks on a 5G network capable of controlling flow packet-based QoS for providing various packet QoS.
  • the 5G network is divided into a core network (CN) and a radio access network (RAN).
  • the terminal assumes a dual mode terminal capable of connecting to both 5G and LTE / LTE-Advanced base station.
  • the 5G Core Network is divided into a Control Plane (CP) and a User Plane (UP) function, and is composed of 5G CN-CP and 5G CN-UP devices, respectively.
  • the interface between the 5G CN-CP and 5G CN-UP devices is connected via the manufacturer's own or standardized interface.
  • the 5G core network is capable of supporting both 5G and LTE (or evolved LTE) base stations.
  • the interface between 5G core network and 5G / LTE / LTE-Advanced radio access network is interworked with eS1 (Enhanced S1).
  • the 5G base station or the LTE / LTE-Advanced base station may be the master base station according to the operator's wireless access network deployment scenario.
  • the master base station is connected to the 5G CN-CP device through the eS1-CP interface, and both the master base station and the secondary base station are connected to the 5G CN-UP device through the eS1-UP interface.
  • FIG. 1 illustrates a case in which 5G and LTE / LTE-Advanced wireless access networks serve as a master base station in a non-standalone interworking structure
  • FIG. 2 illustrates 5G and LTE /
  • the LTE-Advanced radio access network is a network structure when the LTE / LTE-Advanced radio access network 300 serves as a master base station in a non-standalone interworking structure.
  • Multiple packet flows according to various services are delivered from the PDN to the 5G core network 100.
  • the 5G CN-CP 110 generates a QoS policy, performs a storage function, and delivers it to the 5G CN-UP 120 and the master base station.
  • 5G and LTE / LTE-Advanced radio access networks support 1) control of a radio bearer, 2) control of a radio flow, or both.
  • the master base station may merge 1) a plurality of flows received from the 5G core network 100 to generate a new radio flow (if necessary), and 2) map, convert, and generate a radio flow and a radio bearer.
  • the master base station 1) merges a plurality of flows received from the 5G core network 100 to generate a new radio flow (if necessary), 2) maps and generates a core network flow to the radio flow, and 3) for the radio flows. Determine your priorities. In particular, high priority can be given to high priority flows such as RRC signaling messages.
  • FIG. 3 illustrates an example of a method for interworking between 5G and LTE / LTE-Advanced radio access networks according to the present embodiments.
  • the master base station receives a QoS policy from the 5G core network 100 among the 5G radio access network 200 and the LTE / LTE-Advanced radio access network 300 (S300).
  • the master base station receives the packet flow from the 5G core network 100 (S310), if necessary, merges the received packet flows to generate a new flow (S320).
  • the master base station maps the packet flows to the radio flow or the radio bearer based on the QoS policy received from the 5G core network 100 (S330), and performs the control of the radio flow unit or the control of the radio bearer unit.
  • the master base station may transmit a flow identifier assigned by the 5G core network 100 to the terminal 400, the terminal 400 transmits a message including the flow identifier and the bearer identifier to the 5G core network 100 Can be.
  • a procedure for setting and requesting a QoS policy may be performed between the 5G core network 100, the master base station, the secondary base station, and the terminal 400.
  • mapping of the packet flow may be performed in two steps: mapping to the wireless flow and the radio bearer.
  • FIG. 4 shows another example of a process of an interworking method between 5G and LTE / LTE-Advanced wireless access network according to the present embodiments.
  • the master base station among the 5G radio access network 200 and the LTE / LTE-Advanced radio access network 300 receives a QoS policy from the 5G core network 100 (S400).
  • the master base station receives the packet flow from the 5G core network 100 (S410).
  • the master base station maps the packet flow received from the 5G core network 100 to the radio flow based on the QoS policy (S420), and maps the radio flow to the radio bearer (S430).
  • the 5G core network 100 may map the packet flow received from the terminal to the radio flow, and the master base station may map the radio flow mapped by the 5G core network 100 to the radio bearer.
  • the 5G core network 100 may assign a flow identifier and the allocated flow identifier may be transmitted to the terminal 400 by the master base station, and the terminal 400 sends a message including the flow identifier and the bearer identifier to the 5G core network ( 100).
  • a procedure for setting and requesting a QoS policy may be performed between the 5G core network 100, the master base station, the secondary base station, and the terminal 400.
  • This packet flow-based control enables stable interworking between the 5G radio access network 200 and the LTE / LTE-Advanced radio access network 300, and provides various services having various QoS characteristics more flexibly and precisely. do.
  • 5 illustrates an example of an initial connection establishment procedure when interworking between 5G and LTE / LTE-Advanced wireless access network according to the present embodiments.
  • the 5G RRC initial connection setup procedure is performed by the terminal 400 in LTE / LTE-Advanced.
  • 5G RRC signaling is transmitted through the base station 300, and a specific initial connection setup procedure is as follows.
  • the LTE / LTE-Advanced base station 300 broadcasts and transmits system information to the terminal 400 (S500).
  • the terminal 400 transmits a PDN Connectivity Request message to the 5G CN-CP 110 (S501). At this time, the terminal 400 requests a dedicated flow for 5G RRC connection.
  • the flows may be classified in detail according to the purpose of use, attributes, and the like (eg, signaling flow, MBB data flow, URLLC data flow, mMTC data flow, etc.).
  • the 5G CN-CP 110 allocates a flow ID and transmits a Create Session Request message to the PDN 500 (S502).
  • the PDN 500 responds to the 5G CN-CP 110 with a Create Session Response message (S503).
  • a flow QoS policy is set and a request procedure is performed between the 5G CN-CP 110, the 5G CN-UP 120, the RAN 200 and 300, and the terminal 400 (S504).
  • the 5G CN-CP 110 transmits to the terminal 400 including the PDN Connectivity Accept in the Flow Setup Request message (S505).
  • the LTE / LTE-Advanced and 5G radio access networks perform the mapping and conversion procedure between the flow and the radio bearer as needed according to the QoS control method (S506).
  • the LTE / LTE-Advanced base station 300 transmits an RRC Connection Reconfiguration including a PDN Connectivity Accept message to the terminal 400 (S507).
  • the terminal 400 transmits an RRC Connection Reconfiguration Complete to the LTE / LTE-Advanced base station 300 (S508).
  • the LTE / LTE-Advanced base station 300 transmits a flow setup response message to the 5G CN-CP 110 (S509).
  • the terminal 400 configures a bearer ID and a flow ID and transmits a PDN Connectivity Complete message to the 5G CN-CP 110 (S510).
  • the terminal 400 When the terminal 400 acquires PDN address information, the terminal 400 transmits a 5G RRC message to the 5G base station 200 through the LTE / LTE-Advanced base station 300 (S511).
  • 5G based on flow packet control and LTE / LTE-Advanced base station interworking will be able to provide more flexible and detailed services having various requirements and QoS characteristics of 5G.
  • efficient linkage between 5G and LTE / LTE-Advanced base stations provides more reliable connectivity and lowers deployment and operation costs.
  • FIG. 6 shows a configuration of a base station 600 according to the present embodiments.
  • the base station 600 includes a controller 610, a transmitter 620, and a receiver 630.
  • control unit 610 provides a more flexible and detailed method for providing various services having various requirements and QoS characteristics of 5G through 5G based on flow packet control and LTE / LTE-Advanced base station interworking.
  • the overall operation of the base station 600 is controlled.
  • the transmitter 620 and the receiver 630 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention described above.
  • FIG. 7 illustrates a configuration of a user terminal 700 according to the present embodiments.
  • the user terminal 700 includes a receiver 710, a controller 720, and a transmitter 730.
  • the receiver 710 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • control unit 720 in accordance with the present invention described above through the flow packet control based 5G and LTE / LTE-Advanced base station interworking to provide a variety of services having a variety of requirements and QoS characteristics of 5G more flexible and detailed The overall operation of the user terminal 700 according to the control.
  • the transmitter 730 transmits uplink control information, data, and a message to a base station through a corresponding channel.

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

Abstract

La présente invention concerne, dans ses modes de réalisation, un procédé et un appareil pour l'interfonctionnement entre des réseaux d'accès radio (RAN) LTE/LTE avancée 5G dans un réseau 5G capable de réaliser un contrôle de qualité de service (QoS) à base de paquets de flux afin de fournir diverses QoS de paquets. La présente invention, dans ses modes de réalisation, peut en outre fournir de manière flexible et précise divers services 5G qui présentent diverses exigences et caractéristiques de QoS par l'intermédiaire d'un interfonctionnement entre des stations de base LTE/LTE-avancée 5G à base de paquets de flux, et peut assurer une connectivité stable grâce à un interfonctionnement efficace entre les stations de base LTE/LTE-avancée 5G.
PCT/KR2017/004894 2016-05-13 2017-05-11 Procédé pour interfonctionnement entre des réseaux d'accès radio hétérogènes et appareil associé WO2017196106A1 (fr)

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KR10-2016-0059079 2016-05-13
KR1020170055128A KR102172469B1 (ko) 2016-05-13 2017-04-28 이종 무선 액세스 망 간의 연동 방법 및 그 장치
KR10-2017-0055128 2017-04-28

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CN110710257A (zh) * 2018-02-08 2020-01-17 Oppo广东移动通信有限公司 用于上行和下行的数据传输的方法和装置
WO2019236332A1 (fr) * 2018-06-06 2019-12-12 T-Mobile Usa, Inc. Affichage de symbole de réseau dans des régions de double connectivité
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CN111436057B (zh) * 2019-01-15 2022-06-28 华为技术有限公司 一种会话管理方法及装置
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