WO2014011008A1 - Procédé et dispositif pour accéder à un système de communication mobile - Google Patents

Procédé et dispositif pour accéder à un système de communication mobile Download PDF

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Publication number
WO2014011008A1
WO2014011008A1 PCT/KR2013/006309 KR2013006309W WO2014011008A1 WO 2014011008 A1 WO2014011008 A1 WO 2014011008A1 KR 2013006309 W KR2013006309 W KR 2013006309W WO 2014011008 A1 WO2014011008 A1 WO 2014011008A1
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WIPO (PCT)
Prior art keywords
3gpp
data packet
data
ethernet
ethernet data
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PCT/KR2013/006309
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English (en)
Inventor
Wei Wang
Qinghui WANG
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Samsung Electronics Co., Ltd.
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Publication of WO2014011008A1 publication Critical patent/WO2014011008A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0894—Policy-based network configuration management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/22—Manipulation of transport tunnels

Definitions

  • the present invention relates to the field of mobile communications, and specifically relates to a method and device for accessing a mobile communication system.
  • An existing LTE network is used to bear IP traffic flows of LTE Users, and a network reference model thereof, referring to Fig.2, mainly relates to the following network elements:
  • LTE user equipment a mobile device capable of wireless signal sending and/or receiving, baseband processing and high-layer application running, responsible for interconnecting with a base station to obtain radio resources, IP data packet header compression/decompression, user data stream encryption/decryption, QoS guarantee of uplink traffic flow and IP packet filtering;
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • Mobility Management Entity responsible for handling control signaling, distribution of paging and control information, bearer control, mobility management, etc., between the user terminal and the core network;
  • SGW Serving Gateway
  • Packet Data Network Gateway responsible for IP address allocation, QoS guarantee and IP packet filtering of the UE;
  • HSS Home Subscriber Server
  • PCRF Policy and Charging Rules Function
  • the QoS bearer link of the existing LTE system is established completely based on IP packet, and the LTE user can select to access to different APNs (Access Point Names) according to service types.
  • APN Access Point Names
  • the LTE network can establish a multiple of bearer tunnels of different QoS type according to QoS requirements.
  • the traffic flows are classified according to TFT (Traffic Flow Template) rules, and are mapped to bearers, wherein the mapping of uplink traffic flows to the bearers are completed at the UE, and the mapping of downlink traffic flows to the bearers are completed at the PGW.
  • TFT Traffic Flow Template
  • a current TFT performs classification according to five-tuple information in the IP message, referring to Fig.3 for detailed information.
  • a network structure diagram of an existing broadband access network referring to Fig.4, the main access characteristics thereof are:
  • protocol stack XoE e.g., IPoE, PPPoE, etc.
  • the main authentication and IP address allocation is i) completed in the BRAS network element by the PPPoE protocol, and ii) completed in the Web Portal server network element by DHCP protocol;
  • QoS is marked by COS field or VLAN ID of the MAC layer.
  • the access section is network architecture based on Layer 2, and the main elements are described as follows:
  • BRAS Broadband Remote Access Server
  • LTE network When a LTE terminal is used as a back propagation channel, since the LTE network only provides an IP-based network path for a non-3GPP UE, and since the LTE operator can only manage the LTE terminal and cannot manage the non-3GPP UE, thus it neither can perform authentication, authorization, charging for the non-3GPP UE, nor can provide differential service serving for different users.
  • the existing LTE system has the following problems:
  • the LTE network only provides an IP-based network path for non-3GPP users, and data of non-3GPP users cannot be passed through to the existing broadband access network via the LTE network;
  • Layer 2 VLAN information when an enterprise IP virtual network is constructed by using the LTE network, Layer 2 VLAN information can not be transmitted;
  • the LTE network can not distinguish QoS requirements of traffic flows of accessed non-3GPP users, and cannot perform QoS management;
  • the object of the present invention is intended to at least solve one of the above technical defects, and especially provide service tunnels for non-3GPP users, and 3GPP operators can manage 3GPP users and non-3GPP users, realizing uniform charging, management and authorization.
  • An aspect of the embodiments of the present invention is to provide a method for accessing a mobile communication system, comprising the following steps:
  • 3GPP 3rd generation partnership project
  • UE user equipment
  • APN access point name
  • PGW packet data network gateway
  • Another aspect of the embodiments of the present invention is to provide a mobile communication UE, which comprises a receiving module, a sending module and a link establishment module,
  • the receiving module configured to receive data sent by a non-3GPP UE
  • the sending module configured to initiate an attach request with a specific APN value contained therein;
  • the link establishment module configured to establish a bearer link between the link establishment module and a PGW after authentication is finished
  • the receiving module and the sending module realizing uplink-downlink data transmission of Ethernet data packets of the non-3GPP UE via the bearer link.
  • Another aspect of embodiments of the present invention is to provide a gateway device, which comprises a receiving module, a data processing module, a sending module and a link establishment module,
  • the receiving module configured to receive a PDN connectivity request message and user information sent by a 3GPP UE, the user information bearing data sent by a non-3GPP UE;
  • the data processing module configured to perform data processing for the user information
  • the sending module configured to send information to the 3GPP UE or a PDN;
  • the link establishment module configured to establish a bearer link between the link establishment module and the 3GPP UE after authentication is finished, and the sending module forwarding an uplink Ethernet data packet of the non-3GPP UE to an APN via the bearer link, or the receiving module decapsulating a downlink Ethernet data packet and sending the downlink Ethernet data packet to the non-3 GPP UE through the sending module via the bearer link.
  • the present invention proposes to extend 3GPP related protocols to support realization of the service of non-3GPP UE access via a 3GPP network.
  • the network deployment of an operator becomes more flexible and convenient, and the user group of the operator is expanded, realizing uniform management, charging, and operator’s refined service serving for non-3GPP users and LTE users.
  • an application scenario for non-3GPP/LTE users is supplemented, which enables a non-3GPP/LTE user to use services such as remote office, broadband sharing, etc.
  • the solution proposed by the present invention has good backwards compatibility and is hopeful to realize new network mergence services only by simple upgrades in existing mobile LTE networks.
  • FIG.1 is a diagram of network architecture of LTE network bearing non-3GPP services proposed by the present invention.
  • FIG.2 is a diagram of LTE network architecture under non-roaming status defined in 3GPP standards
  • FIG.3 is a structure of current LTE system traffic flow and bearer
  • FIG.4 is a diagram of network architecture of current broadband access
  • FIG.5 is diagram of architecture of a non-3GPP network intercommunicating with a LTE network
  • FIGs.6A-6B are a newly defined TFT process
  • FIG.7 is a method of realizing Layer 2 VPN in the newly defined LTE network
  • FIGs.8a-8b are a newly defined LTE access procedure and establishment of a default bearer
  • FIG.9 is a TFT updating procedure related to a non-3GPP UE initiated by the LTE UE;
  • FIG.10 is a message procedure that a PCRF server initiates and creates a dedicated bearer for the non-3GPP UE;
  • FIGs.11a-11b are a procedure of binding a data stream that passes the LTE UE with a VLAN ID
  • FIG.12 is a newly defined method of realizing band sharing in the LTE network
  • FIG.13 is a schematic diagram of the structure of a UE.
  • FIG.14 is a schematic diagram of the structure of a gateway device.
  • the present invention proposes to extend 3GPP related protocols to support realization of the service of non-3GPP UE access via a 3GPP network.
  • An aspect of the embodiments of the present invention proposes a method for accessing a mobile communication system, comprising the following steps:
  • the 3GPP UE and a PGW establishing a bearer link to realize uplink-downlink data transmission of Ethernet data packets of the non-3GPP UE via the bearer link.
  • realizing uplink-downlink data transmission of Ethernet data packets of the non-3GPP UE via the bearer link comprises:
  • the non-3GPP APN forwarding an uplink Ethernet data packet of the non-3GPP UE to a non-3GPP APN via the bearer link between the 3GPP UE and the PGW, the non-3GPP APN being determined according to the specific APN value;
  • the Ethernet data packet includes but is not limited to a data packet based on a local area network protocol set defined in the IEEE802.3 standards, and usually a data packet on the second layer (Layer 2) of the communication protocol is referred to as a MAC data packet.
  • Layer 2 the second layer of the communication protocol
  • some part of the present invention will not further distinguish differences between an Ethernet data packet and a MAC data packet, and a MAC data packet will be used to illustrate the present invention.
  • the data transmitted over the LTE network may not be Ethernet data packets as defined in the IEEE802.3 standards, while may be MAC data packets defined according to communication protocols of different terminals. Therefore, the Ethernet data packets in the present invention should be understood as Ethernet data packets including but not limited to MAC packets.
  • 3GPP related protocols need to be extended to support realization of non-3GPP UE access via the 3GPP network. Specifically:
  • Extend PGW locally extended gateway
  • the gateway extends the following functions of the PGW: 1) forwarding uplink MAC data packets to an APN where a broadband access server locates; 2) encapsulating downlink MAC data packets from the broadband access server and sending them to the UE; and 3) charging for the TFT of the UE, for detailed information please referring to Fig.1.
  • a flag is added on the S6a interface to mark the function of transmission from the HSS to the MME.
  • a new field value “ETH_Enable” is added in the AVP of the APN-configuration-Profile of the Subscription-Data of the Update location acknowledgement message of the S6a interface, as shown by the italic and bold part below, to realize distribution of user configuration information subscribed by a user to the user:
  • APN-Configuration-Profile ⁇ AVP header: 1429 10415>
  • APN-Configuration :: ⁇ AVP header: 1430 10415>
  • an “Ethernet Enable” parameter is added for each APN, the parameter has two values: “ETH-only” and “ETH-prohibited” which respectively represent that the APN only allows access via Ethernet and doesn’t allow access via Ethernet.
  • HSS needs to be able to instruct the MME how to deal with the ETH_Enable flag so as to decide whether to carry out MAC over IP process for the data uploaded by the APN.
  • e) extending existing PDP context/PDN connection activation process can be used to establish an Ethernet-based PDN, which comprises adding judgment of whether the UE can establish an Ethernet bearer, and the PGW selection mechanism is carried out by the MME.
  • the LTE UE is powered on and initiates an Attach, sending an Attach Request message and a PDN connecting request message to the MME and transmitting a specific APN request (for example, “WLAN” for non-3GPP connection or “Internet” for 4G connection).
  • a specific APN request for example, “WLAN” for non-3GPP connection or “Internet” for 4G connection.
  • 803/804/805 an authentication process is completed between the UE and the MME.
  • an Update Location Request message is sent between the MME and the HSS to request for user subscription information.
  • the HSS sends an Update location acknowledgement message which carries user subscription information and contains the newly defined flags of “AVP” and “ETH_Enable” to the MME.
  • the MME checks the user’s subscription data and checks whether the user’s ETH_Enable flag has been configured to allow accessing a specific APN “WLAN”.
  • the address of the PGW of the connected broadband access server stored in the subscription data is adopted directly, and if the ETH_Enable flag has not been selected, then a default APN “internet” is normally connected, and the MME selects a P-SW procedure for the UE, which is based on the procedure specified by 3GPP TS 23.401 4.3.8.1.
  • the P-GW responds to the S-GW with a Create Session Response message, and the message is forwarded to the MME, the message containing the information element of Protocol configuration options confirmed by the PGW.
  • the MME sends an Attach Accept message to the LTE UE, requesting for establishing a default bearer.
  • the LTE UE returns Attach Complete to the MME, and the establishment of the default bearer is completed over the air interface.
  • the MME sends Modify Bearer Request message establishment to the S-GW and PGW to complete the establishment of the default bearer on the SGW and the PGW.
  • a) extending TFT characteristics adding Layer 2 address information (MAC, COS, etc.) to the TFT information element so that the LTE UE or PGW realizes mapping and classification of the data packets and realizes the function of uniform charging based on the TFT.
  • Layer 2 address information MAC, COS, etc.
  • the Packet Filter Attributes information element is defined as follows in the specification:
  • a non-3GPP UE sends a first MAC data packet by using the LTE UE, and when the LTE UE detects that the resource MAC of the data does not exist in a current TFT, a TFT resource modification request is triggered.
  • the LTE UE sends a bearer resource modification request message to the MME, the message containing a newly defined information element of non-3GPP ID (containing information such as MAC and LTE UE IP address of the non-3GPP UE) and new TFT information.
  • a bearer resource modification request message to the MME, the message containing a newly defined information element of non-3GPP ID (containing information such as MAC and LTE UE IP address of the non-3GPP UE) and new TFT information.
  • the MME sends a Bearer Resource Command message to the S-GW to request for modifying resources related to the bearer, the message containing the newly defined information element of the non-3GPP ID (containing the information such as the non-3GPP UE MAC and the LTE UE IP address) and the new TFT information.
  • the non-3GPP ID containing the information such as the non-3GPP UE MAC and the LTE UE IP address
  • the S-GW sends a Bearer Resource Command message to the P-GW to request for modifying the resources related to the bearer, the message containing the newly defined information element of the non-3GPP ID (containing the information such as the non-3GPP UE MAC and the LTE UE IP address) and the new TFT information.
  • the non-3GPP ID containing the information such as the non-3GPP UE MAC and the LTE UE IP address
  • a PCEF (Policy and Charging Enforcement Function) unit triggers an IP bearer resource modification request, and the message contains an ID of the current session, non-3GPP MAC and the LTE UE IP.
  • Policy and Charging Enforcement Function Policy and Charging Enforcement Function
  • the PCRF server stores mapping relationships of information such as session ID, non-3GPP MAC, LTE UE, TFT.
  • the LTE UE receives the new TFT information and sends a session management confirmation message to the MME
  • the MME initiates a bearer resource modification confirmation message to the S-GW/P-GW.
  • the PCEF unit sends a bearer modification completion message to the PCRF server.
  • the BRAS sends a session status to the PCRF server via the Gxb interface after the BRAS completes the authentication, authorization, and IP address allocation for the non-3GPP UE, the session containing the MAC address and allocated IP address of the non-3GPP UE.
  • the PCRF server After the PCRF server receives the message, it will associate the MAC address and the allocated IP address of the non-3GPP UE, LTE UE Session ID and other property values.
  • the PCRF server when the PCRF server receives the “Creating dedicated bearer request” message, it finds out the non-3GPP MAC address and the Session ID of the LTE UE according to the non-3GPP IP address and constructs a “Creating dedicated bearer request” message for the PGW according to the Session ID, QoS requirements, MAC address, etc., the message containing non-3GPP MAC-based TFT, QoS requirements, etc.
  • a dedicated bearer is established in the LTE network and an acknowledgement message is returned to the AF.
  • the LTE user and the VLAN ID are bond at the HSS; when the LTE user accesses, the VLAN ID is distributed to the LTE terminal; the LTE terminal adds the VLAN ID information to Layer 2 data packets thereof and transmits the data packets over the LTE network; the PGW forwards MAC packets carrying the VLAN ID to the IP network of the operator.
  • the main step comprises:
  • the HSS distributing VLAN configuration information to the user is realized by extending the AVP property of the user data (Subscription Data) in an update location message between the LTE UE and the HSS and adding a VLAN ID property.
  • AVP property of the user data Subscribescription Data
  • Subscription-Data :: ⁇ AVP header: 1400 10415>
  • the LTE UE is powered on and initiates an Attach, sending the Attach message and a PDN Connecting request message to the MME with the message containing a specific APN value, to connect to a PDN which supports VLAN connection.
  • the MME sends an update location request message to the HSS to request for user subscription information.
  • the HSS sends an update location acknowledgement message to the MME with the message carrying the user subscription information, checks and determines whether the APN supports the “ETH-enable” flag, adds the VLAN Tag property in the message, and sends the VLAN tag subscribed by the user.
  • the P-GW and PCRF server initiate an IP-CAN session establishment procedure.
  • 1114/1115 a connection is established between the LTE UE and a base station.
  • the LTE UE returns an attach complete message to the MME, to complete the establishment of the default bearer over the air interface.
  • the MME sends modify bearer message establishment to the S-GW and PGW, to complete the establishment of the default bearer on the S-GW and the PGW.
  • the above extended system architecture is an embodiment of the present invention.
  • the 3GPP UE performs one or more of the following operations to the data of the non-3GPP UE:
  • performing the MAC packet encapsulation/decapsulation comprises:
  • the 3GPP UE when the non-3GPP UE sends an uplink data packet through the 3GPP UE, the 3GPP UE realizes encapsulation of a MAC packet of the pass-through data of the non-3GPP UE, and maps it to the ETH type-based bearer, and
  • the 3GPP UE realizes decapsulation of a MAC over IP packet of the pass-through data of the non-3GPP UE.
  • the 3GPP UE receives a first MAC data packet sent by the non-3GPP UE, and when it detects that the resource MAC of the data packet does not exist in a current TFT, the 3GPP UE triggers a TFT resource modification request towards the MME.
  • the MAC packet-based TFT classification and mapping comprises:
  • the 3GPP UE uses a distributed non-IP uplink TFT policy, so that a filter of the 3GPP UE performs classification for them according to the MAC addresses, then maps them to traffic flows of different QoS levels and then binds them to corresponding bearers.
  • VLAN ID comprises:
  • the 3GPP UE when the 3GPP UE receives a VLAN ID sent by a HSS, and when the 3GPP UE encapsulates a MAC packet of the uplink data of the non-3GPP which realizes the pass-through, the VLAN ID is added.
  • the extended PGW performs one or more of the following operations to the data of the non-3GPP UE:
  • MAC packet encapsulation/decapsulation MAC packet-based TFT classification and mapping, and receiving/sending MAC-based data packets from/to a PDN.
  • the MAC packet encapsulation/decapsulation comprises:
  • the extended PGW encapsulates a MAC packet of the pass-through data of the 3GPP UE and maps it to an ETH type-based bearer
  • the extended PGW decapsulates a MAC over IP packet of the pass-through data of the non-3GPP UE and forwards it to a BRAS.
  • the BRAS After the BRAS completes authentication, authorization, and IP address allocation for the non-3GPP UE, it will send a session status to the PCRF server through the Gxb interface, in which the session contains a MAC address and an allocated IP address of the non-3GPP UE;
  • the PCRF server when the PCRF server receives the session status, it will associate the MAC address and the allocated IP address of the non-3GPP, a session ID of the 3GPP UE and a property value thereof;
  • the application function monitors that the user sends a create bearer request, it will trigger a creating dedicated bearer request message towards the PCRF server, in which the message contains the IP address and QoS requirements of the non-3GPP UE;
  • the PCRF server After the PCRF server receives the creating dedicated bearer request message, it finds out the MAC address of the non-3GPP and the session ID of the 3GPP UE according to the IP address of the non-3GPP, and constructs a creating dedicated bearer request message for the PGW according to the Session ID, QoS requirements, MAC address; and
  • a bearer link is established between the 3GPP UE and the extended PGW of the PDN, and an acknowledge message is sent to the AF.
  • the MAC packet-based TFT classification and mapping comprises:
  • the extended PGW when the non-3GPP UE sends downlink services through the extended PGW, the extended PGW using a sent non-IP downlink TFT policy, so that a filter of the extended PGW making classification according to MAC addresses, then mapping the downlink services to traffic flows of different QoS levels and then binding them to corresponding bearers.
  • receiving/sending MAC-based data packets from/to the PDN comprises:
  • the extended PGW when the extended PGW receives a data packet containing a VLAN ID sent from the 3GPP UE, the extended PGW needs to decapsulate a MAC Over IP data packet of the non-3GPP UE data that need to be passed through, and then forwards it.
  • the extended PGW When the extended PGW receives a MAC data packet containing the VLAN ID from the APN, it will remove the VLAN ID and forwards the MAC data packet to the 3GPP UE.
  • the extended PGW performs charging and QoS control for the non-3GPP UE based on TFT information.
  • corresponding functions of the extended PCRF server comprise: realizing association of the MAC address and IP address of the non-3GPP terminal, the IP address of the LTE UE, the session ID, etc.
  • the embodiments of the present invention also propose a mobile communication UE 100 which comprises a receiving module 110, a sending module 130 and a link establishment module 140.
  • the receiving module 110 is configured to receive data sent by a non-3GPP UE; the sending module 130 is configured to initiate an attach request, the attach request containing a specific APN value; the link establishment module 140 is configured to establish a bearer link between with the PGW when authentication is finished; the receiving module 110 and the sending module 130 realize uplink-downlink data transmission of MAC data packets of the non-3GPP UE via the bearer link.
  • the receiving module 110 and the sending module 130 realizing the uplink-downlink data transmission of the MAC data packets of the non-3GPP UE via the bearer link comprises:
  • the sending module 130 forwarding an uplink MAC data packet of the non-3GPP UE to the non-3GPP APN via the link between the 3GPP UE and the extended PGW, and the non-3GPP APN being determined according to the specific APN value;
  • the sending module 130 decapsulating a downlink MAC data packet for the non-3GPP UE and sends it to the non-3GPP UE through the 3GPP UE.
  • the data processing module 120 performs the following one or more of the following operations to the data of the non-3GPP UE:
  • the receiving module 110 receives the first MAC data packet sent by the non-3GPP UE, and when it detects that the resource MAC of the data packet does not exist in the current TFT, the sending module 130 triggers a TFT resource modification request towards the MME.
  • the data processing module 120 performing the MAC packet encapsulation/ decapsulation comprises:
  • the data processing module 120 realizes the encapsulation of a MAC packet of the pass-through data of the non-3GPP UE and maps it to an ETH type-based bearer, and when the non-3GPP UE receives a downlink data packet through the receiving module 110, the data processing module 120 realizes the decapsulation of a MAC over IP packet of the pass-through data of the non-3GPP UE.
  • the MAC packet-based TFT classification and mapping of the data processing module 120 comprises:
  • VLAN ID by the data processing module 120 comprises:
  • the receiving module 110 receiving a VLAN ID sent by a HSS and when the data processing module 120 encapsulating a MAC packet of uplink data of the non-3GPP UE that realize pass-through, adding the VLAN ID.
  • the embodiments of the present invention also proposes a gateway device 200 which comprises a receiving module 210, a data processing module 220, a sending module 230 and a link establishment module 240.
  • the receiving module 210 is configured to receive a PDN connecting request message and user information sent by a 3GPP UE, wherein the user information bears data sent by a non-3GPP UE.
  • the data processing module 220 is configured to perform data processing for the user information.
  • the sending module 230 is configured to send information to the 3GPP UE or a PDN.
  • the link establishment module 240 is configured to establishes a bearer link with the 3GPP UE after the 3GPP UE has passed authentication, and the sending module 230 forwards an uplink MAC data packets of the non-3GPP UE to an APN via the bearer link, or the receiving module 210 encapsulates a downlink MAC data packet and sends it to the non-3GPP UE through the sending module 230 via the bearer link.
  • the data processing module 220 performs one or more of the following operations to the data of the non-3GPP UE:
  • the data processing module 220 performing the MAC packet encapsulation/decapsulation comprises:
  • the data processing module 220 when downlink data of the non-3GPP UE passing the data processing module 220, the data processing module 220 encapsulating a MAC packet of the pass-through data of the non-3GPP UE, and then mapping the encapsulated Ethernet data packet to an ETH type-based bearers, or
  • the data processing module 220 decapsulating a MAC over IP packet of the pass-through data of the non-3GPP UE and then forwarding the decapsulated MAC over IP packet to the BRAS.
  • the MAC packet-based TFT classification and mapping of the data processing module 220 comprises:
  • the data processing module 220 when the data processing module 220 receives a data packet containing a VLAN ID sent by the APN, it removes the VLAN ID for the MAC packet of the non-3GPP UE data that needs to be passed through. And when the receiving module 210 receives a MAC data packet containing the VLAN ID from the APN, the data processing module 220 removes the VLAN ID and then forwards the MAC data packet to the 3GPP UE.
  • the present invention proposes the above method or device for the existing LTE network, by extending the 3GPP related protocols to support the service of non-3GPP UE access via a 3GPP network.
  • the method and device proposed by the present invention make the network deployment of an operator more flexible and convenient, and expand the user group of the operator, realizing unified management, charging and refined service serving for non-3GPP Users and LTE users.
  • the scenario for non-3GPP/LTE users is supplemented, and enables a non-3GPP/LTE user to use services such as remote office, broadband sharing, etc.
  • the above method and device proposed by the present invention have good backwards compatibility and is hopeful to realize new network mergence services only by simple upgrades in existing mobile LTE networks.
  • Non-3GPP UE access the network via a LTE terminal
  • a non-3GPP UE such as a PC, a PAD, a television, audio and video monitoring equipment as well as a variety of terminals of Internet of Things, is connected to the LTE/3G UE through WiFi, Bluetooth, UWB, etc., and connected to different APNs via the 3G/LTE network.
  • QoS management such as uniform management, charging, bandwidth control of the Non-3GPP is achieved.
  • the Ethernet access type needs to be added in corresponding messages, and the UE side and the PGW side need to add a TFT and have a function of processing MAC over IP.
  • the LTE UE is powered on and initiates an attach, sending the attach request message containing a specific APN (for example, “WLAN” for non-3GPP connection or “Internet” for 4G connection).
  • a specific APN for example, “WLAN” for non-3GPP connection or “Internet” for 4G connection.
  • 803/804/805 an authentication process is completed between the UE and the MME.
  • an update location request message is sent between the MME and the HSS to request for user subscription information.
  • the HSS sends an update location acknowledgement message which carries user subscription information and contains the newly defined flags of “AVP” and “ETH_Enable” to the MME.
  • the MME checks the user’s subscription data and checks whether the user’s ETH_Enable flag has been configured to allow accessing a specific APN “WLAN”.
  • the address of the PGW of the connected broadband access server stored in the subscription data is adopted directly, and if the ETH_Enable flag has not been selected, then a default APN “internet” is normally connected, and the MME selects a P-SW procedure for the UE, which is based on the procedure specified by 3GPP TS 23.401 4.3.8.1.
  • the P-GW responds to the S-GW with a Create Session Response message, and the message is forwarded to the MME, the message containing the information element of Protocol configuration options confirmed by the PGW.
  • the MME sends an Attach Accept message to the LTE UE, requesting for establishing a default bearer.
  • the LTE UE returns Attach Complete to the MME, and the establishment of the default bearer is completed over the air interface.
  • the MME sends modify bearer request message establishment to the S-GW and PGW to complete the establishment of the default bearer on the SGW and the PGW.
  • BRAS needs to update QoS information allocated to the user in the non-3GPP network for the PCRF server, so as to update LTE network bearer information used by the non-3GPP so as to realize the uniform management of the non-3GPP Users and the 3GPP Users.
  • the BRAS sends a session status to the PCRF server via the Gxb interface after the BRAS completes the authentication, authorization, and IP address allocation for the non-3GPP UE, the session containing the MAC address and allocated IP address of the non-3GPP UE.
  • the PCRF server After the PCRF server receives the message, it will associate the MAC address and the allocated IP address of the non-3GPP UE, LTE UE Session ID and other property values.
  • the PCRF server when the PCRF server receives the “creating dedicated bearer request” message, it finds out the non-3GPP MAC address and the Session ID of the LTE UE according to the non-3GPP IP address and constructs a “creating dedicated bearer request” message for the PGW according to the Session ID, QoS requirements, MAC address, etc., the message containing non-3GPP MAC-based TFT, QoS requirements, etc.
  • a dedicated bearer is established in the LTE network and an acknowledgement message is returned to the AF.
  • the attach procedure of the LTE UE is identical to that in the 3GPP network, but existing message AVP needs to be modified, access type AVP is added in attach request/accept, update location answer, create session request/response, and bearers are established according to the type,
  • New TFT is added in information related to bearer establishment, and MAC classification is also added. And the process of MAC over GTP is added at the UE/PGW side.
  • a LTE/3G UE user can apply for the service of remote office. And when the user relocates to another city, he can set up a small branch agency by using the UE (or a smart phone), the respective terminals connected with this UE can use the IP server in the headquarter office to set up a Layer 2 VPN network.
  • Network architecture see Fig.7.
  • different company users can connect the branch agency and the headquarter office together by a Layer 2 network, and different LTE Users/CPEs define different VLAN ID allocated for the terminals by defining different VLAN IDs and by labeling a WLAN user access the network through these UE/CPE.
  • EPC forwarding, mapping with the VRF of the operator’s edge routers, and finally sent to the headquarter of the company via the MPLS, Layer 2 network isolation and application are achieved.
  • the LTE UE is powered on and initiates Attach, sending an Attach message and a PDN Connectivity request message to the MME with the message containing a specific APN value, to connect to a PDN which supports VLAN connection.
  • the MME sends an update location request message to the HSS to request for user subscription information.
  • the HSS sends an Update location acknowledgement message to the MME with the message carrying the user subscription information, checks and determines whether the APN supports the “ETH-enable” flag, adds the VLAN Tag property in the message, and sends the VLAN tag subscribed by the user.
  • 1110 the P-GW and PCRF server initiate an IP-CAN Session Establishment procedure.
  • 1114/1115 a connection is established between the LTE UE and a base station.
  • the LTE UE returns an Attach Complete message to the MME, to complete the establishment of the default bearer over the air interface.
  • the MME sends Modify Bearer message establishment to the S-GW and PGW, to complete the establishment of the default bearer on the S-GW and the PGW.
  • VLAN ID is distributed to the LTE terminal, a VLAN Tag is added in the Update Location Answer message, and the VLAN tag allocated to the user by the operator is distributed via the HSS.
  • a new TFT is added in the related messages of the Create Bearer, VLAN ID classification is added, and the process of MAC over GTP is added at the UE/PGW side.
  • the LTE terminal adds VLAN ID information in Layer 2 data packets thereof and passes it through the LTE network.
  • the terminal accesses two different networks at the same time, e.g., ADSL broadband and LTE network, and the terminal bandwidth can be extended to realize higher bandwidth service requirements.
  • Detailed reference network architecture is shown as Fig.12.
  • a PC surfs on the internet through ADSL or residential broadband service and the bandwidth is not enough, however, another terminal thereof such as a smart phone is connected in the 3G/LTE network, therefore, it can apply for extend the bandwidth and send information related to the current PC (e.g., IP address, etc.) to the AF by using the mobile phone to apply for bandwidth sharing service.
  • the AF After the AF receives the application, it will open the Ethernet-based dedicated bearer between the UE and PGWs connecting to a same PGW, the PC downloads load sharing software and open the Wifi to connect to the smart phone, and in this way, the PC by using the load sharing method, sends PPPoe packets to a same BRAS via different links so as to realize the purpose of bandwidth sharing. See the following Figs.11a-11b for detailed information.
  • the user can apply for establishing an APN connection based on Ethernet type and used by the previous service, and by the connection, the user to a broadband access device used by the previous service is established.
  • User terminal can transmit Layer 2 Ethernet data packets to a same BRAS via two different links, therefore, the UE side needs only to provide software having the load sharing function.
  • the IP address obtained by the user is still based on the original network access part, and the connection of the original network does not need to disconnect.
  • non-3GPP UE connection request can be handled.
  • extending the existing PGW by the following functions:
  • the present invention proposes to extend 3GPP related protocols to support realization of the service of non-3GPP UE access via a 3GPP network
  • the extension method is as follows: 1. Adding new properties related to access in the session message; 2. by adding the new TFT in the session and the Create Bearer message, and requiring the UE and the PGW realizing the process of encapsulation and decapsulation of Ethernet over IP, and the MME selects the functions of the PGW and the Ethernet forwarding function of the PGW according to the newly added access property.
  • the protocol stack After the extension by the above method, the protocol stack, selected message, the detailed content of the message (the contained property value) and after adopting the message, the internal of the LTE network is providing related processing procedures, methods, etc., related to relevant services; filling the corresponding gap in the current LTE standards.
  • the method and device provided by the present invention make the network deployment of an operator becomes more flexible and convenient, and the user group of the operator is expanded, realizing uniform management, charging, and operator’s refined service serving for non-3GPP Users and LTE users.
  • the method and device proposed by the present invention have good backwards compatibility and are hopeful to realize new network mergence services only by simple upgrades in existing mobile LTE networks.
  • the method provided by the present invention can also be applied in other communication systems.
  • the individual functional units in respective implementations can be integrated into a processing module, or the individual units exist physically separated, or two or more units are integrated into one module.
  • the above integrated module can be implemented by way of hardware or can be implemented by way of software. If the integrated module is implemented by way of software and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the above mentioned storage medium can be ROM, magnet disk or disk, etc.

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

Abstract

La présente invention concerne un procédé pour accéder à un système de communication mobile. Ledit procédé comprend les étapes suivantes : un équipement d'utilisateur (UE) 3GPP en liaison avec un UE non 3GPP déclenche une demande de rattachement qui contient une valeur d'un APN ; et l'UE 3GPP et une passerelle PGW établissent une liaison porteuse pour réaliser une transmission de données en liaison montante-liaison descendante de paquets de données Ethernet de l'UE non 3GPP via la liaison porteuse. Grâce à l'extension de protocoles relatifs à 3GPP afin de prendre en charge le service d'un accès à un UE non 3GPP via un réseau 3GPP, de rendre le déploiement d'un réseau d'un opérateur plus flexible et plus commode, et d'étendre le groupe d'utilisateurs de l'opérateur, il est possible d'obtenir une gestion uniforme, une facturation uniforme et une fourniture uniforme de services améliorés de l'opérateur pour des utilisateurs non 3GPP et des utilisateurs LTE.
PCT/KR2013/006309 2012-07-13 2013-07-15 Procédé et dispositif pour accéder à un système de communication mobile WO2014011008A1 (fr)

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