WO2012006909A1 - 一种上报固网接入信息的方法及系统 - Google Patents

一种上报固网接入信息的方法及系统 Download PDF

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Publication number
WO2012006909A1
WO2012006909A1 PCT/CN2011/075401 CN2011075401W WO2012006909A1 WO 2012006909 A1 WO2012006909 A1 WO 2012006909A1 CN 2011075401 W CN2011075401 W CN 2011075401W WO 2012006909 A1 WO2012006909 A1 WO 2012006909A1
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WIPO (PCT)
Prior art keywords
information
address
fixed network
network access
location information
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PCT/CN2011/075401
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English (en)
French (fr)
Inventor
芮通
周晓云
孙默
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US13/701,803 priority Critical patent/US8849273B2/en
Priority to EP11806251.2A priority patent/EP2571327B1/en
Publication of WO2012006909A1 publication Critical patent/WO2012006909A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/20—Network architectures or network communication protocols for network security for managing network security; network security policies in general
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/66—Policy and charging system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24—Accounting or billing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1403—Architecture for metering, charging or billing
    • H04L12/1407—Policy-and-charging control [PCC] architecture
    • 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
    • H04L41/0893—Assignment of logical groups to network elements
    • 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
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5041—Network service management, e.g. ensuring proper service fulfilment according to agreements characterised by the time relationship between creation and deployment of a service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a method and system for reporting fixed network access information. Background technique
  • EPS 3rd Generation Partnership Project
  • Evolved Packet System Evolved Packet System
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • PDN-GW Packet Data Network Gateway
  • HSS Home Subscriber Server
  • AAA Authentication, Authorization and Accounting
  • PCRF Policy and Charging Rules Function
  • the MME is responsible for control planes such as mobility management, processing of non-access stratum signaling, and management of user mobility management context;
  • the GW is an access gateway device connected to the E-UTRAN, and forwards data between the E-UTRAN and the PDN-GW, and is responsible for buffering the paging waiting data;
  • the PDN-GW can also be abbreviated as P-GW, which is EPS and
  • P-GW which is EPS
  • the border gateway of the Packet Data Network (PDN) network is responsible for the access of the PDN and the forwarding of data between the EPS and the PDN;
  • the S-GW and the PDN-GW belong to the core network gateway;
  • the PCRF is the policy and charging.
  • the rule function entity the PCRF is connected to the service network of the Internet Protocol (Internet Protocol) through the receiving interface Rx to obtain service information.
  • the PCRF is also connected to the gateway device in the network through the Gx/Gxa/Gxc interface, and is responsible for initiating the IP bearer. Establish, guarantee Service quality of service (QoS, Quality of Service), and charging control.
  • QoS Quality of Service
  • QoS Quality of Service
  • EPS supports interworking with non-3GPP systems, where interworking with non-3GPP systems is implemented through the S2a/b/c interface, and PDN-GW acts as an anchor between 3GPP and non-3GPP systems.
  • non-3GPP systems are classified into trusted non-3GPP IP access and untrusted non-3GPP IP access.
  • the trusted non-3GPP IP access can be directly connected to the PDN-GW through the S2a interface; the untrusted non-3GPP IP access needs to be connected to the PDN-GW by the Evolved Packet Data Gateway (ePDG), ePDG and PDN-
  • ePDG Evolved Packet Data Gateway
  • ePDG Evolved Packet Data Gateway
  • the S2c provides user plane-related control and mobility support between the user equipment (UE, User Equipment) and the PDN-GW.
  • the supported mobility management protocol is dual-stack mobile IPv6 ( DSMIPv6, Moblie IPv6 Support for Dual Stack Hosts and Routers
  • the Policy and Charging Enforcement Function (PCEF) entity exists in the PDN-GW, and the Gx interface is exchanged between the PCRF and the PDN-GW, as shown in Figure 1.
  • PCEF Policy and Charging Enforcement Function
  • the S-GW also has a bearer binding and event reporting function (BBERF, Bearer Binding and Event Report Function) entity to perform QoS control on the service data flow, S-GW and The PCRF exchanges information through the Gxc interface, as shown in Figure 1.
  • BBERF Bearer Binding and Event Report Function
  • the trusted non-3GPP access gateway exchanges information with the PCRF through the Gxa interface, as shown in FIG.
  • the S9* interface functions as an interface between the home PCRF and the visited PCRF, and provides an application function (AF, Application Function) for the UE, and sends the policy and charging control (PCC) to the PCRF through the Rx interface.
  • AF Application Function
  • PCC policy and charging control
  • the corresponding PDN network can be found by the access point name (APN, Access Point Name).
  • a connection from the UE to the PDN network is usually referred to as an IP-Connected Access Network (IP-Access) session.
  • IP-Access IP-Connected Access Network
  • Diameter session is established between the BBERF and the PCEF and the PCRF, respectively. Policy charging information for controlling this IP-CAN session, information for formulating policies, and the like are transmitted through these Diameter sessions.
  • the Diameter session is based on the Diameter protocol, and the Diameter protocol is an upgraded version of the Remote Authentication Dial In User Service (RADIUS) protocol.
  • RADIUS Remote Authentication Dial In User Service
  • BPCF Broadband Policy Control Function
  • the main function of BPCF is to formulate corresponding policies; Policy Enforcement Point (PEF) usually resides in fixed network transmission equipment, such as: Broadband Access Server (BRAS, Broadband Remote Access Server) / Broadcast Network Gateway (BNG, Broadband Network Gateway), executed according to the corresponding policy formulated by BPCF; AAA server, storing user subscription information.
  • PEF Policy Enforcement Point
  • BRAS Broadband Access Server
  • BNG Broadband Network Gateway
  • AAA server storing user subscription information.
  • AF develops a strategy for BPCF to provide corresponding business information.
  • the structure of BPCF is relatively rough, and relevant details are still being further developed.
  • the Fixed Mobile Convergence (FMC) scenario that operators are currently paying attention to is based on the research of 3GPP and BBF interconnection.
  • the S9* interface is used, and the S9* interface is located between the PCRF and the BPCF.
  • the mobile operator will rent a line of the WLAN (Wireless Local Area Networks) connected to the fixed network operator from the perspective of cost saving.
  • the UE accesses the WLAN through the fixed network.
  • Mode 1 As shown in Figure 3, the UE accesses the home gateway (RG, Residential Gateway) through the WiFi access point, and accesses the device (AN, Access). Note ), such as digital subscriber line access multiplexing
  • DLAM Digital Subscriber Line Access Multiplexer
  • BRAS Broadband Remote Access Server
  • BNG Broadband Remote Access Server
  • the IP address of the UE is allocated by the RG
  • the IP address of the RG is set by the BRAS/BNG. Allocation, therefore, way one in this case, RG needs to do IP address translation.
  • the IP address of the UE is configured by the RG.
  • the UE accesses the RG, and the user name and password are used to authenticate the RG.
  • the authentication succeeds RG to allocate an internal address to the user.
  • the address is exemplified by the BRAS/BNG allocation. For example: When the RG is powered on, the RG initiates authentication to the BRAS/BNG, and the BRAS/BNG assigns an address to the RG.
  • Manner 2 As shown in Figure 4, the UE accesses through the WiFi access point and accesses the BRAS/BNG through the AN. At this time, the IP address of the UE is allocated by the BRAS/BNG. For the access to the BRAS/BNG through the AN, of course, there may be an RG between the AN and the BRAS/BNG at the time of access, but in the second case, the RG is different from the first one, and is not The IP address is assigned to the UE. The RG is only a Layer 2 device. The user is not assigned an IP address. The connection between the UE and the BRAS is a Layer 2 connection.
  • the IP address assigned by the fixed network operator to the UE or the RG using the BRAS/BNG may also be a private IP address.
  • the BRAS/BNG also needs to perform IP address translation.
  • the BRAS/BNG allocates the IP address and the authentication to the UE, and the BRAS/BNG is located in the BBF fixed network. Therefore, the BBF fixed network will perceive the UE to access the WLAN, and the BPCF can also perceive the UE to access the WLAN. : Can be learned by BNG/BRAS, or BBF AAA is known, so BPCF can initiate S9* session establishment to PCRF.
  • BNG/BRAS or BBF AAA is known, so BPCF can initiate S9* session establishment to PCRF.
  • the UE accesses the WLAN through the RG, since the UE is already in the RG authentication, and the RG has assigned the IP address to the UE, the UE will not go to the BRAS/BNG authentication. Therefore, the BBF fixed network does not perceive.
  • the BPCF When the UE accesses the WLAN, the BPCF does not perceive the UE to access the WLAN. For example, when the UE sends the message, the RG translates the source IP address of the UE into the RG's own IP address + a certain port, so that the BRAS is in the BRAS. /BNG seems to receive IP packets from RGs. It is not aware of who the specific UE behind the RG is, so that the BPCF cannot initiate an S9* session to the PCRF. In summary, the existing technology is adopted, because the S9* session is initiated to the PCRF through the BPCF, and the premise of initiating the S9* session is that the BPCF must perceive the UE to access the WLAN.
  • the main object of the present invention is to provide a method and system for reporting fixed network access information, which can report fixed network access information, thereby realizing that UE access cannot be perceived in BPCF.
  • a method for reporting the fixed network access information comprising: reporting, by the evolved packet data gateway (ePDG), the fixed network access information to a policy and charging execution function (PCEF); the PCEF connecting the fixed network
  • ePDG evolved packet data gateway
  • PCEF policy and charging execution function
  • the incoming information informs the Policy and Charging Rules function (PCRF).
  • PCRF Policy and Charging Rules function
  • the fixed network access information includes: location information of the user equipment (UE); the reporting includes: the UE accessing the mobile core network through a wireless local area network (WLAN), and reporting, by the ePDG, the UE Location information is sent to the PCEF; the PCEF informs the PCRF of the location information of the UE.
  • UE user equipment
  • WLAN wireless local area network
  • the method further includes: the PCRF initiates establishment of the S9* session to a broadband policy control function (BPCF) corresponding to the location information of the UE according to the obtained location information of the UE.
  • BPCF broadband policy control function
  • the location information of the UE includes an identifier of the UE, and/or tunnel information.
  • the identifier of the UE includes: a fixed network access identifier of the UE;
  • the tunnel information includes: local (local) IP address information of the UE; the local IP address information of the UE includes: an IP address and/or a port used by the UE and the ePDG to establish an IP-Sec tunnel. Information; among them,
  • the IP address information is specifically a public network IP address allocated by the BRAS/BNG for the UE;
  • the IP address information is specifically a public network IP address allocated by the BRAS/BNG to the RG.
  • the IP address information is specifically the address of the BRAS/BNG.
  • a system for reporting fixed network access information comprising: a reporting unit, configured to report the fixed network access information to the PCEF by the ePDG; and the PCEF notifies the PCRF of the fixed network access information.
  • the fixed network access information includes: location information of the user equipment (UE); the reporting unit is further used by the UE to access the mobile core network through the WLAN, and the ePDG reports the location information of the UE. Giving the PCEF; the PCEF notifying the PCRF of the location information of the UE.
  • the system further includes: a session establishing unit, configured to: initiate, by the PCRF, the establishment of the S9* session to the BPCF corresponding to the location information of the UE according to the learned location information of the UE.
  • a session establishing unit configured to: initiate, by the PCRF, the establishment of the S9* session to the BPCF corresponding to the location information of the UE according to the learned location information of the UE.
  • the location information of the UE includes an identifier of the UE, and/or tunnel information.
  • the identifier of the UE includes: a fixed network access identifier of the UE;
  • the tunnel information includes: local IP address information of the UE; the local IP address information of the UE includes: an IP address and/or port information used by the UE and the ePDG to establish an IP-Sec tunnel;
  • the IP address information is specifically a public network IP address allocated by the BRAS/BNG for the UE;
  • the IP address information is specifically a public network IP address allocated by the BRAS/BNG to the RG.
  • the IP address information is specifically an address of the BRAS/BNG.
  • the invention reports the fixed network access information to the PCEF by the ePDG; the PCEF informs the PCRF of the fixed network access information.
  • the present invention is different from the prior art in that the fixed network access information is reported to the PCRF, so that the PCRF initiates the establishment of the S9* session to the BPCF, and the BPCF can still be established when the BPCF cannot perceive the UE to access the WLAN. S9 *session. DRAWINGS
  • FIG. 1 is a schematic diagram of a system architecture of an EPS in the prior art
  • FIG. 2 is a schematic diagram of a BBF BPCF architecture in the prior art
  • FIG. 3 is a schematic diagram of a UE accessing an EPS core network through a WLAN in the prior art
  • FIG. 4 is another schematic diagram of a UE accessing an EPS core network through a WLAN in the prior art
  • FIG. Flow chart of network WLAN access
  • FIG. 6 is a flowchart of a UE switching through 3GPP access and switching from 3GPP access to WLAN access according to Embodiment 2 of the present invention. detailed description
  • the basic idea of the present invention is: The fixed network access information is reported to the PCEF by the ePDG; the PCEF informs the PCRF of the fixed network access information.
  • the solution of the present invention implements reporting the fixed network access information to the PCRF, so that the PCRF initiates the establishment of the S9* session to the BPCF, so that when the BPCF cannot perceive the UE to access the WLAN, the S9* session can still be established. Moreover, the present invention further initiates the establishment of the S9* session by the PCRF.
  • the S9* session is initiated by the BPCF, which is different from the prior art. Since the present invention improves the flow of the prior art, as long as the fixed network access information is known, It is possible to initiate an S9* session. This hair
  • the unified process is not only applicable to the scenario where the BPCF cannot detect the UE accessing the WLAN, but also applies to the scenario where the BPCF can perceive the UE to access the WLAN.
  • a method for reporting fixed network access information mainly includes the following contents:
  • the ePDG reports the fixed network access information to the PCEF; the PCEF informs the PCRF of the fixed network access information. Further, for the scenario in which the BPCF cannot detect the UE accessing the WLAN, after obtaining the fixed network access information, the PCRF is used to establish an S9* session to the BPCF; correspondingly, from the perspective of the process uniformity, even if the BPCF can sense the UE connection In the scenario of entering the WLAN, after learning the fixed network access information, the PCRF is used to establish an S9* session to the BPCF.
  • the S9* interface in this document refers to an evolved interface form based on the S9 interface; the S9* session refers to: an S9-based evolved session form.
  • the name "S9*" is used to indicate the evolution from S9, but other names that can implement the functions of the present invention are also within the scope of the present invention and will not be described again.
  • the fixed network access information includes location information of the UE.
  • the ePDG informs the PCEF of the location information of the UE through the S2b interface, and the location information of the UE may include the identifier of the UE, and/or the tunnel information.
  • the S2b interface is located between the ePDG and the PDN-GW, and the PCEF entity exists in the PDN-GW, where the S2b interface is embodied, that is, the S2b
  • the interface corresponds to the tunnel between the ePDG and the PCEF.
  • the tunnel includes a GTP tunnel or a PMIP tunnel.
  • GTP is represented as GPRS Tunnel Protocol
  • GTP is the tunneling protocol in general packet radio service technology
  • PMIP is represented as Proxy MIP
  • PMIP is acting as mobile IP tunneling protocol.
  • the identifier of the UE includes a fixed network access identifier of the UE.
  • the tunnel information includes IP address information and/or port information when the UE and the ePDG establish an IP-Sec tunnel.
  • the IP address information includes: The public network IP address assigned by the BRAS/BNG to the UE, or the public network IP address assigned by the BRAS/BNG to the RG, or the address of the BRAS/BNG)
  • the PCEF informs the PCRF of the location information of the UE through the Gx interface.
  • the PCRF After the PCRF receives the location information of the UE, the PCRF initiates an S9* session to the BPCF, and sends the location information of the UE to the BPCF.
  • the invention is illustrated by way of example below.
  • Embodiment 1 The attachment process of the UE through the fixed network WLAN access.
  • the UE accesses the WLAN through the fixed network.
  • the BBERF passes the S2b interface (corresponding to a GTP or PMIP tunnel between the BBERF and the PCEF).
  • the location information is sent to the PCEF, and the location information of the UE may include the identifier of the UE and the tunnel information.
  • the PCEF After receiving the location information of the UE, the PCEF carries the location information of the UE by using a proxy binding update (PBU, Proxy Binding Update) message, and sends the location information.
  • PBU Proxy Binding Update
  • the PCRF establishes an S9* session to the BPCF, and sends the location information of the UE to the BPCF.
  • the identifier of the UE includes: a fixed network access identifier of the UE.
  • the tunnel information includes IP address information and port information when the UE and the ePDG establish an IP-Sec tunnel; the IP address information includes: a public network IP address allocated by the BRAS/BNG for the UE, or a BRAS/BNG allocated for the RG Public IP address, or BRAS/BNG address.
  • the flow of this embodiment shown in FIG. 5 includes the following steps:
  • Step 101 The UE accesses the mobile core network through the BBF fixed network to complete the access authentication, and the authentication process may pass the BRAS/BNG and the BBF AAA Proxy.
  • Step 102 The BBF fixed network allocates an IP address to the UE, which may be allocated by the BNG or the RG for the UE. For details, refer to the description of the background art.
  • Step 103 The UE and the ePDG establish an IP-Sec tunnel, and the ePDG authenticates to the 3GPP AAA. Authorized, 3GPP AAA returns the address of the PDN-GW.
  • Step 104 The ePDG (BBERF) initiates a proxy binding update to the PCEF.
  • the proxy binding update message carries the location information of the UE, and the location information of the UE may include the identifier of the UE and the tunnel information.
  • the identifier of the UE may be the fixed network access ID of the UE.
  • the tunnel information may be: IP address information and port information when the UE and the ePDG establish an IP-Sec tunnel.
  • the IP address information includes: a public network IP address allocated by the BRAS/BNG for the UE, or a public network IP address allocated by the BRAS/BNG for the RG, or an address of the BRAS/BNG.
  • Step 105 The PCEF initiates an IP-CAN session establishment request to the PCRF.
  • the request message carries the location information of the UE
  • the location information of the UE may include the fixed network access identifier and the tunnel information of the UE.
  • Step 106 The PDN-GW updates the IP address to the HSS/AAA.
  • step 106 and step 105 can be concurrent.
  • Step 107 The PCRF establishes an S9* session to the BPCF according to the UE location information.
  • the PCRF establishes an S9* session to the BPCF according to the UE location information, for example: according to the IP address information and the port information, the access location information of the UE is learned, and the information is sent to the corresponding BPCF.
  • the IP address information can be carried in the S9* session.
  • the PCRF formulates a corresponding PCC policy for the IP-CAN session.
  • Step 108 The PCRF returns a response to the PCEF.
  • the response message may have a corresponding PCC rule.
  • Step 109 The PGW returns a proxy binding response to the ePDG, and completes establishment of a PMIP or a GTP tunnel between the ePDG and the PDN-GW.
  • Step 110 After receiving the message, the ePDG returns to the UE that the IP-Sec tunnel is successfully established.
  • Embodiment 2 A process in which a UE accesses through 3GPP and switches from 3GPP access to WLAN access.
  • the UE accesses through 3GPP, and when it detects the WLAN signal, it switches from 3GPP access to WLAN access, for example: The user returns home from work, switching from outside 3GPP access to WLAN access at home.
  • the BBERF sends the location information of the UE to the PCEF through the S2b interface.
  • the location information of the UE may include the identifier of the UE and the tunnel information, and the PCEF receives the information.
  • the location information of the UE is carried by the PBU message, and is sent to the PCRF.
  • the PCRF After receiving the location information of the UE, the PCRF establishes an S9* session to the BPCF, and sends the location information of the UE to the BPCF.
  • the identifier of the UE includes: a fixed network access identifier of the UE.
  • the tunnel information includes IP address information and port information when the UE and the ePDG establish an IP-Sec tunnel; the IP address information includes: a public network IP address allocated by the BRAS/BNG for the UE, or a BRAS/BNG allocated for the RG Public IP address, or BRAS/BNG address.
  • the flow of this embodiment shown in FIG. 6 includes the following steps:
  • Step 201 The UE has established an EPS bearer through the 3GPP access, where the S-GW and the PDN-GW directly establish a PMIP or a GTP tunnel.
  • Step 202 The UE discovers the WLAN signal and attempts to access through the WLAN. For example, the user returns home from work and accesses the WLAN through the home.
  • Step 203 The UE accesses the mobile core network through the BBF fixed network to complete the access authentication, and the authentication process may pass the BRAS/BNG and the BBF AAA Proxy.
  • Step 204 The BBF fixed network allocates an IP address to the UE, which may be allocated by the BNG or the RG for the UE. For details, refer to the description of the background art.
  • Step 205 The UE and the ePDG establish an IP-Sec tunnel, the ePDG authenticates and authorizes the 3GPP AAA, and the 3GPP AAA returns the address of the PDN-GW.
  • Step 206 The ePDG (BBERF) initiates a proxy binding update to the PCEF.
  • the proxy binding update message carries the location information of the UE, and the location information of the UE may include the identifier of the UE and the tunnel information.
  • the identifier of the UE may be the fixed network access ID of the UE.
  • the tunnel information may be: IP address information and port information when the UE and the ePDG establish an IP-Sec tunnel.
  • the IP address may be a public network IP address assigned to the UE by the BRAS/BNG, or a public network IP address assigned by the BRAS/BNG to the RG, or an address of the BRAS/BNG.
  • Step 207 The PCEF initiates an IP-CAN session establishment request to the PCRF.
  • the message carries the location information of the UE, and the location information of the UE may include the fixed network access identifier and the tunnel information of the UE.
  • Step 208 The PCRF establishes an S9* session to the BPCF.
  • the PCRF establishes an S9* session to the BPCF according to the UE location information, for example, according to the IP address information and the port information, the UE access location information is obtained, and the S9* session is sent to the corresponding BPCF.
  • the IP address information is carried in the S9* session.
  • Step 209 The PCRF returns a response to the PCEF.
  • the response message may carry a corresponding PCC policy formulated by the PCRF for the IP-CAN session.
  • Step 210 The PGW returns a proxy binding response to the ePDG, and completes establishment of a PMIP or a GTP tunnel between the ePDG and the PDN-GW.
  • Step 211 After receiving the message, the ePDG returns an IP-Sec tunnel to the UE.
  • Step 212 The PCRF may initiate a resource admission request, and the step may be after step 208.
  • Step 213 The UE may initiate establishment of another PDN connection.
  • Step 214 The PDN-GW initiates release of the EPS bearer accessed by the 3GPP.
  • a system for reporting fixed network access information includes a reporting unit, and the reporting unit is configured to report the fixed network access information to the PCEF by the ePDG; the PCEF notifies the PCRF of the fixed network access information.
  • the fixed network access information includes: location information of the UE.
  • the reporting unit is further configured to: when the UE accesses the mobile core network through the WLAN, and establishes an IP security tunnel to the ePDG, the ePDG reports the location information of the UE to the PCEF; the PCEF notifies the PCRF of the location information of the UE.
  • the system further includes a session establishing unit, and the session establishing unit is configured to initiate, by the PCRF, the establishment of the S9* session to the BPCF corresponding to the location information of the UE according to the learned location information of the UE.
  • the location information of the UE specifically includes an identifier of the UE, and/or tunnel information.
  • the identifier of the UE specifically includes: a fixed network access identifier of the UE; the tunnel information specifically includes:
  • IP address information and/or port information when the UE and the ePDG establish an IP-Sec tunnel.

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Abstract

本发明公开了一种上报固网接入信息的方法，由演进的分组数据网关（ePDG）上报固网接入信息给策略和计费执行功能（PCEF）；所述PCEF将所述固网接入信息告知策略和计费规则功能（PCRF）。本发明还公开了一种上报固网接入信息的系统，上报单元用于ePDG上报固网接入信息给PCEF；所述PCEF将所述固网接入信息告知PCRF。采用本发明，能上报固网接入信息，从而实现了在BPCF无法感知到用户设备（UE）接入无线局域网络（WLAN）时，依旧能建立S9*会话。

Description

一种上报固网接入信息的方法及系统 技术领域
本发明涉及移动通信领域， 尤其涉及一种上报固网接入信息的方法及 系统。 背景技术
第三代合作伙伴计划 （3GPP, 3rd Generation Partnership Project )演进 的分组系统（ EPS , Evolved Packet System ) 由演进的通用移动通信系统陆 地无线接入网 （E-UTRAN , Evolved Universal Terrestrial Radio Access Network )、 移动性管理实体（ MME , Mobility Management Entity )、 服务网 关（S-GW, Serving Gateway ), 分组数据网络网关（ PDN-GW, Packet Data Network Gateway )、 归属用户服务器（ HSS, Home Subscriber Server )、 3GPP 的认证 4受权计费 ( AAA, Authentication、 Authorization and Accounting )月良 务器， 策略和计费规则功能（PCRF, Policy and Charging Rules Function ) 实体及其他支撑节点组成。 图 1是根据相关技术的 EPS的系统架构的示意 图， 如图 1所示， MME负责移动性管理、 非接入层信令的处理和用户移动 管理上下文的管理等控制面的相关工作； S-GW是与 E-UTRAN相连的接入 网关设备， 在 E-UTRAN和 PDN-GW之间转发数据， 并且负责对寻呼等待 数据进行緩存； PDN-GW也可以简写为 P-GW, 是 EPS 与分组数据网络 ( PDN, Packet Data Network )网络的边界网关， 负责 PDN的接入及在 EPS 与 PDN间转发数据等功能； S-GW和 PDN-GW都属于核心网网关； PCRF 是策略和计费规则功能实体， PCRF 通过接收接口 Rx和网际协议（IP , Internet Protocol ) 业务网络相连， 获取业务信息， 此外， PCRF 还通过 Gx/Gxa/Gxc接口与网络中的网关设备相连， 负责发起 IP承载的建立， 保证 业务数据的服务质量（QoS, Quality of Service ), 并进行计费控制。
EPS支持与非 3GPP 系统的互通， 其中， 与非 3GPP 系统的互通通过 S2a/b/c接口实现， PDN-GW作为 3GPP与非 3GPP系统间的锚点。 在 EPS 的系统架构图中，非 3GPP系统被分为可信任非 3GPP IP接入和不可信任非 3GPP IP接入。 可信任非 3GPP IP接入可直接通过 S2a接口与 PDN-GW连 接； 不可信任非 3GPP IP接入需经过演进的分组数据网关（ePDG, Evolved Packet Data Gateway )与 PDN-GW相连， ePDG与 PDN-GW间的接口为 S2b, S2c提供了用户设备 ( UE, User Equipment ) 与 PDN-GW之间的用户面相 关的控制和移动性支持， 其支持的移动性管理协议为支持双栈的移动 IPv6 (DSMIPv6, Moblie IPv6 Support for Dual Stack Hosts and Routers
在 EPS系统之中， 策略和计费执行功能 （PCEF, Policy and Charging Enforcement Function )实体存在于 PDN-GW中， PCRF与 PDN-GW之间釆 用 Gx接口交换信息， 如图 1 所示。 当 PDN-GW与 S-GW间的接口基于 ΡΜΙΡνό时， S-GW也具有承载绑定和事件报告功能（ BBERF, Bearer Binding and Event Report Function )实体对业务数据流进行 QoS控制， S-GW与 PCRF 之间通过 Gxc接口交换信息， 如图 1所示。 当通过可信任非 3GPP接入系 统接入时， 可信任非 3GPP接入网关中也驻留 BBERF。 可信任非 3GPP接 入网关与 PCRF之间通过 Gxa接口交换信息， 如图 1所示。 当 UE漫游时， S9*接口作为归属地 PCRF和拜访地 PCRF的接口， 同时为 UE提供业务的 应用功能 （AF, Application Function ), 通过 Rx接口向 PCRF发送用于制 定策略和计费控制 （PCC, Policy and Charging Control ) 策略的业务信息。 在 3GPP中， 通过接入点名称（APN, Access Point Name )可以找到对应的 PDN 网络。 通常将 UE到 PDN 网络的一个连接称为一个 IP连接接入网 ( IP-CAN, IP Connectivity Access Network )会话。 在建立 IP-CAN会话的 过程中， BBERF和 PCEF分别与 PCRF之间建立直径（Diameter )会话， 通过这些 Diameter会话来传送对这个 IP-CAN会话进行控制的策略计费信 息和用于制定策略的信息等。其中，所述 Diameter会话基于 Diameter协议， 而 Diameter协议是远端用拨入验证服务（RADIUS , Remote Authentication Dial In User Service )协议的升级版本。
与之对应的宽带论坛（BBF, Broadband Forum )提出了宽带策略控制 架构——宽带策略控制功能（ BPCF, Broadband Policy Control Function ), 如图 2所示。 BPCF主要功能是制定相应的策略； 策略执行点（PEF, Policy Enforcement Point )通常驻留在固网传输设备中， 例如： 宽带接入服务器 ( BRAS, Broadband Remote Access Server )/广播网络网关（ BNG, Broadband Network Gateway ), 根据 BPCF制定的相应策略进行执行； AAA服务器， 储存用户签约信息。 AF为 BPCF制定策略,提供相应的业务信息。目前 BPCF 的架构还比较粗略， 相关细节还在进一步的制定中。
现在运营商很关注的固网移动融合 ( FMC, Fixed Mobile Convergence ) 场景， 就是基于对 3 GPP和 BBF互联互通进行研究。 对于用户通过 BBF固 网接入移动核心网的场景， 是需要对整个数据的路由路径 （数据会经过固 网和移动网传输）上的 QoS进行保证的。 现阶段釆用 S9*接口方式进行， 且 S9*接口位于 PCRF和 BPCF之间。 移动运营商为了更好的运营业务， 扩 大无线的覆盖， 从节约成本的角度考虑， 会去租用固网运营商的一段无线 局域网络（ WLAN, Wireless Local Area Networks )接入的线路。 UE通过固 网的 WLAN接入， 由于这个数据的传输会经过固网， 当移动运营商会将固 网运营商视为不可信任的网络时， UE会和 ePDG建立 IP安全（ IP-Sec )隧 道， 这样保证 UE到 ePDG之间的传输的数据被加密， 固网传输设备无法得 知传输的内容。 由于实际部署的不同， 现有技术中存在以下两种方式： 方式一：如图 3所示，UE通过 WiFi接入点接入家庭网关（ RG, Residential Gateway ), 通过接入设备（AN, Access Note ), 例如数字用户线接入复用 设备 ( DSLAM, Digital Subscriber Line Access Multiplexer )接入宽带接入服 务器（BRAS , Broadband Remote Access Server )或 BNG, 此时， 由于 UE 的 IP地址是由 RG分配的， 而 RG的 IP地址由 BRAS/BNG分配， 因此， 方式一这种情况下， RG需要做 IP地址转换。 其中， 针对所述 UE的 IP地 址是由 RG分配进行举例， 例如： UE接入 RG, 釆用用户名密码的方式在 RG上认证，认证成功 RG为用户分配内部地址； 针对所述 RG的 IP地址由 BRAS/BNG分配进行举例， 例如： 在 RG上电时， RG向 BRAS/BNG发起 认证， BRAS/BNG为该 RG分配地址。
方式二： 如图 4 所示， UE 通过 WiFi接入点接入， 通过 AN接入 BRAS/BNG, 此时 UE的 IP地址是由 BRAS/BNG分配的。 其中， 针对所述 通过 AN接入 BRAS/BNG而言，当然在接入时 AN与 BRAS/BNG之间也可 能有 RG, 但时， 方式二这种情况下的 RG区别于方式一， 并不为 UE分配 IP地址， 此时的 RG只是一个二层设备， 不为用户分配 IP地址， 和 UE及 BRAS之间的连接是二层的连接。
为了节约地址空间， 固网运营商使用 BRAS/BNG为 UE或是 RG分配 的 IP地址也可能是私有 IP地址， 此时 BRAS/BNG也需要做 IP地址转换。
对于方式二，由于 BRAS/BNG为 UE分配 IP地址及认证，而 BRAS/BNG 位于 BBF固网内， 因此， BBF固网会感知到 UE接入 WLAN, BPCF也可 以感知到 UE接入 WLAN ,例如：可以通过 BNG/BRAS获知，或是 BBF AAA 获知， 从而 BPCF可以向 PCRF发起 S9*会话建立。 然而对于方式一， UE 在通过 RG接入 WLAN时， 由于 UE已经在 RG认证， 且 RG已经为 UE 分配了 IP地址， UE就不会再去 BRAS/BNG认证， 因此， BBF固网不会感 知到 UE接入 WLAN, BPCF也不会感知到 UE接入 WLAN, 例如： 当 UE 发送 文时， RG将 4艮文中 UE的源 IP地址转换成 RG自己的 IP地址 +某个 端口， 这样在 BRAS/BNG看来， 收到的 IP报文都是来自 RG的 IP报文， 并不感知 RG后面的具体 UE是谁，从而 BPCF无法向 PCRF发起 S9*会话。 总之， 釆用现有技术， 由于是通过 BPCF向 PCRF发起 S9*会话， 而发起 S9*会话的前提是 BPCF必须感知到 UE接入 WLAN才行， 因此， 当 BPCF 感知不到 UE接入 WLAN时， 是无法发起 S9*会话的。 目前迫切需要一种 方案， 能上报固网接入信息，从而在 BPCF无法感知到 UE接入 WLAN时， 依旧能建立 S9*会话。 发明内容
有鉴于此， 本发明的主要目的在于提供一种上报固网接入信息的方法 及系统， 能上报固网接入信息， 从而实现了在 BPCF无法感知到 UE接入
WLAN时， 依旧能建立 S9*会话。
为达到上述目的， 本发明的技术方案是这样实现的：
一种上报固网接入信息的方法， 该方法包括： 由演进的分组数据网关 ( ePDG )上报固网接入信息给策略和计费执行功能 （PCEF ); 所述 PCEF 将所述固网接入信息告知策略和计费规则功能（ PCRF )。
其中， 所述固网接入信息包括： 用户设备（UE ) 的位置信息； 所述上报包括：所述 UE通过无线局域网络（ WLAN )接入移动核心网， 由所述 ePDG上报所述 UE的位置信息给所述 PCEF;所述 PCEF将所述 UE 的位置信息告知所述 PCRF。
其中， 该方法还包括： 所述 PCRF根据获知的所述 UE的位置信息， 向 与所述 UE的位置信息相对应的宽带策略控制功能（BPCF )发起所述 S9* 会话的建立。
其中， 所述 UE的位置信息包括 UE的标识、 和 /或隧道信息。
其中， 所述 UE的标识包括： UE的固网接入标识；
所述隧道信息包括： UE的本地（ Local ) IP地址信息；所述 UE的 Local IP地址信息包括： UE和 ePDG建立 IP-Sec隧道时使用的 IP地址和 /或端口 信息； 其中，
无 NAT的场景下， 所述 IP地址信息具体为 BRAS/BNG的为 UE分配 的公网 IP地址；
RG作为 NAT的场景下，所述 IP地址信息具体为 BRAS/BNG为 RG分 配的公网 IP地址；
BRAS/BNG做 NAT的场景下， 所述 IP地址信息具体为 BRAS/BNG的 地址。
一种上报固网接入信息的系统， 该系统包括： 上报单元， 用于 ePDG 上报固网接入信息给 PCEF; 所述 PCEF将所述固网接入信息告知 PCRF。
其中， 所述固网接入信息包括： 用户设备（UE ) 的位置信息； 所述上报单元， 进一步用于所述 UE通过 WLAN接入移动核心网， 由 所述 ePDG上报所述 UE的位置信息给所述 PCEF; 所述 PCEF将所述 UE 的位置信息告知所述 PCRF。
其中， 该系统还包括： 会话建立单元， 用于所述 PCRF根据获知的所 述 UE的位置信息， 向与所述 UE的位置信息相对应的 BPCF发起所述 S9* 会话的建立。
其中， 所述 UE的位置信息包括 UE的标识、 和 /或隧道信息。
其中， 所述 UE的标识包括： UE的固网接入标识；
所述隧道信息包括： UE的 Local IP地址信息； 所述 UE的 Local IP地 址信息包括： UE和 ePDG建立 IP-Sec隧道时使用的 IP地址和 /或端口信息； 其中，
无 NAT的场景下， 所述 IP地址信息具体为 BRAS/BNG的为 UE分配 的公网 IP地址；
RG作为 NAT的场景下，所述 IP地址信息具体为 BRAS/BNG为 RG分 配的公网 IP地址； BRAS/BNG做 NAT的场景下， 所述 IP地址信息具体为 BRAS/BNG的 地址。
本发明由 ePDG上报固网接入信息给 PCEF; PCEF将固网接入信息告 知 PCRF。
釆用本发明， 区别于现有技术， 实现了上报固网接入信息给 PCRF, 从 而由 PCRF向 BPCF发起 S9*会话的建立， 实现了在 BPCF无法感知到 UE 接入 WLAN时， 依旧能建立 S9 *会话。 附图说明
图 1为现有技术中 EPS的系统架构的示意图；
图 2为现有技术中 BBF BPCF架构图；
图 3为现有技术中 UE通过 WLAN接入 EPS核心网的一示意图； 图 4为现有技术中 UE通过 WLAN接入 EPS核心网的另一示意图； 图 5为本发明实施例一 UE通过固网 WLAN接入的流程图；
图 6 为本发明实施例二 UE通过 3GPP接入并从 3GPP接入切换到 WLAN接入的流程图。 具体实施方式
本发明的基本思想是： 由 ePDG上报固网接入信息给 PCEF; PCEF将 固网接入信息告知 PCRF。
下面结合附图对技术方案的实施作进一步的详细描述。
本发明的方案实现了上报固网接入信息给 PCRF,从而由 PCRF向 BPCF 发起 S9*会话的建立， 实现了在 BPCF无法感知到 UE接入 WLAN时， 依 旧能建立 S9*会话。 而且， 本发明进一步由 PCRF发起建立 S9*会话， 区别 于现有技术由 BPCF发起建立 S9*会话，由于本发明对现有技术的流程进行 了改进， 因此， 只要能获知固网接入信息， 就可以发起建立 S9*会话。 本发 明釆用统一的流程，不仅适用于 BPCF无法感知到 UE接入 WLAN的场景， 而且也同样适用于 BPCF可以感知到 UE接入 WLAN的场景。
一种上报固网接入信息的方法， 该方法主要包括以下内容：
由 ePDG上报固网接入信息给 PCEF; PCEF将固网接入信息告知 PCRF。 进一步的， 对于 BPCF无法感知 UE接入 WLAN的场景， 在获知固网 接入信息后， 釆用 PCRF向 BPCF建立 S9*会话； 相应的， 从流程统一的角 度来看， 即使 BPCF可以感知 UE接入 WLAN的场景， 也可以在获知固网 接入信息后， 釆用 PCRF向 BPCF建立 S9*会话。
这里需要指出的是， 本文的所述 S9*接口指基于 S9接口的演进接口形 式； 所述 S9*会话指： 基于 S9 的演进会话形式。 本文暂且用 "S9*" 这一 名称表示区别于 S9的演进， 但是能实现本发明功能的其他名称也都在本发 明的保护范围内， 不作赘述。
进一步的， 固网接入信息包括 UE的位置信息。
进一步的， UE通过 WLAN接入移动核心网， 向 ePDG建立 IP-Sec隧 道时， ePDG将 UE的位置信息通过 S2b接口告知 PCEF, 该 UE的位置信 息可以包括 UE的标识、 和 /或隧道信息。
进一步的， 针对所述 S2b接口而言， 所述 S2b接口是位于 ePDG与 PDN-GW之间的， 而 PCEF实体存在于 PDN-GW中， 这里对所述 S2b接口 具体化， 即为所述 S2b接口对应 ePDG与 PCEF之间的隧道。 该隧道包括 GTP隧道或 PMIP隧道。 其中， GTP表示为 GPRS Tunnel Protocol, GTP为 通用分组无线服务技术中的隧道协议； PMIP表示为 Proxy MIP, PMIP为代 理移动 IP隧道协议。
进一步的， 针对所述 UE的标识而言， 所述 UE的标识包括 UE的固网 接入标识。 针对所述隧道信息而言， 所述隧道信息包括 UE和 ePDG建立 IP-Sec 隧道时的 IP 地址信息、 和 /或端口信息。 该 IP 地址信息包括： BRAS/BNG为 UE分配的公网 IP地址、 或 BRAS/BNG为 RG分配的公网 IP地址、 或 BRAS/BNG的地址 )
进一步的， PCEF收到 UE的位置信息后， 通过 Gx接口向 PCRF告知 该 UE的位置信息。
进一步的 , PCRF收到 UE的位置信息后 , PCRF向 BPCF发起建立 S9* 会话， 并将该 UE的位置信息发送给 BPCF。
以下对本发明进行举例阐述。
实施例一： UE通过固网 WLAN接入的附着流程。
UE通过固网 WLAN接入， 当 UE 完成固网接入认证后， 向 ePDG ( BBERF )建立 IP-Sec隧道时， BBERF通过 S2b接口（对应 BBERF和 PCEF 之间是 GTP或 PMIP隧道 )将 UE的位置信息发送给 PCEF, 该 UE的位置 信息可以包括 UE的标识和隧道信息， PCEF收到 UE的位置信息后， 通过 代理绑定更新（PBU, Proxy Binding Update )消息携带 UE的位置信息， 并 发送给 PCRF, PCRF收到 UE的位置信息后， 向 BPCF建立 S9*会话， 并 将该 UE的位置信息发送给 BPCF。
其中， 所述 UE的标识包括： UE的固网接入标识。 所述隧道信息包括 UE和 ePDG建立 IP-Sec隧道时的 IP地址信息和端口信息； 所述 IP地址信 息包括： BRAS/BNG的为 UE分配的公网 IP地址、或 BRAS/BNG为 RG分 配的公网 IP地址、 或 BRAS/BNG的地址。
如图 5所示的本实施例的流程， 包括以下步骤：
步骤 101、 UE通过 BBF固网接入到移动核心网， 完成接入认证， 认证 过程可能经过 BRAS/BNG、 BBF AAA Proxy。
步骤 102、 BBF固网为 UE分配 IP地址， 可能是由 BNG或是 RG为 UE分配， 详见背景技术的描述。
步骤 103、 UE和 ePDG建立 IP-Sec隧道， ePDG向 3GPP AAA认证和 授权 , 3GPP AAA返回 PDN-GW的地址。
步骤 104、 ePDG ( BBERF ) 向 PCEF发起代理绑定更新。
这里， 代理绑定更新消息中携带 UE的位置信息， 该 UE的位置信息可 以包括 UE的标识和隧道信息。 UE的标识可以是 UE的固网接入 ID； 隧道 信息可以是： UE和 ePDG建立 IP-Sec隧道时的 IP地址信息和端口信息。 该 IP地址信息包括： BRAS/BNG的为 UE分配的公网 IP地址、或 BRAS/BNG 为 RG分配的公网 IP地址、 或 BRAS/BNG的地址。
步骤 105、 PCEF向 PCRF发起 IP-CAN会话建立请求。
这里， 该请求消息中携带 UE的位置信息， 该 UE的位置信息可以包括 UE的固网接入标识和隧道信息。
步骤 106、 PDN-GW向 HSS/AAA更新 IP地址。
这里， 步骤 106和步骤 105可以并发。
步骤 107、 PCRF根据 UE位置信息向 BPCF建立 S9*会话。
这里， PCRF根据 UE位置信息向 BPCF建立 S9*会话时， 例如： 根据 IP地址信息和端口信息， 获知 UE的接入位置信息， 向相应的 BPCF发送
S9*会话。 该 S9*会话中可以携带该 IP地址信息。 完成接纳控制请求之后，
PCRF为该 IP-CAN会话制定相应的 PCC策略。
步骤 108、 PCRF向 PCEF返回响应。
这里， 该响应消息中可以带有相应的 PCC规则。
步骤 109、 PGW向 ePDG返回代理绑定响应， 完成 ePDG和 PDN-GW 之间的 PMIP或 GTP隧道的建立。
步骤 110、 ePDG收到消息后 , 向 UE返回 IP-Sec隧道建立成功。
实施例二： UE通过 3GPP接入并从 3GPP接入切换到 WLAN接入的 流程。
UE通过 3GPP接入， 当检测到 WLAN信号时， 从 3GPP接入切换到 WLAN接入， 例如： 用户下班回到家中， 从外面的 3 GPP接入切换到家中 的 WLAN接入。 UE完成固网接入认证后， 向 ePDG ( BBERF )建立 IP Sec 隧道时 , BBERF通过 S2b接口将 UE的位置信息发送给 PCEF, 该 UE的位 置信息可以包括 UE的标识和隧道信息， PCEF收到 UE的位置信息后， 通 过 PBU消息携带 UE的位置信息， 并发送给 PCRF, PCRF收到 UE的位置 信息后， 向 BPCF建立 S9*会话， 并将该 UE的位置信息发送给 BPCF。
其中， 所述 UE的标识包括： UE的固网接入标识。 所述隧道信息包括 UE和 ePDG建立 IP-Sec隧道时的 IP地址信息和端口信息； 所述 IP地址信 息包括： BRAS/BNG的为 UE分配的公网 IP地址、或 BRAS/BNG为 RG分 配的公网 IP地址、 或 BRAS/BNG的地址。
如图 6所示的本实施例的流程， 包括以下步骤：
步骤 201、 UE 已经通过 3GPP接入， 建立 EPS承载， 其中 S-GW和 PDN-GW直接建立 PMIP或 GTP隧道。
步骤 202、 UE发现 WLAN信号， 尝试通过 WLAN接入， 例如： 用户 下班回到家中， 通过家中的 WLAN接入。
步骤 203、 UE通过 BBF固网接入到移动核心网， 完成接入认证， 认证 过程可能经过 BRAS/BNG , BBF AAA Proxy。
步骤 204、 BBF固网为 UE分配 IP地址， 可能是由 BNG或是 RG为 UE分配， 详见背景技术的描述。
步骤 205、 UE和 ePDG建立 IP-Sec隧道， ePDG向 3GPP AAA认证和 授权 , 3GPP AAA返回 PDN-GW的地址。
步骤 206、 ePDG ( BBERF ) 向 PCEF发起代理绑定更新。
这里， 代理绑定更新消息中携带 UE的位置信息， 该 UE的位置信息可 以包括 UE的标识和隧道信息。 UE的标识可以是 UE的固网接入 ID； 隧道 信息可以是： UE和 ePDG建立 IP-Sec隧道时的 IP地址信息和端口信息。 该 IP地址可能是 BRAS/BNG的为 UE分配的公网 IP地址、 或 BRAS/BNG 为 RG分配的公网 IP地址、 或 BRAS/BNG的地址。
步骤 207、 PCEF向 PCRF发起 IP-CAN会话建立请求。
这里， 该消息中带有 UE的位置信息， 该 UE的位置信息可以包括 UE 的固网接入标识和隧道信息。
步骤 208、 PCRF向 BPCF建立 S9*会话。
这里， PCRF根据 UE位置信息向 BPCF建立 S9*会话时， 例如： 根据 IP地址信息和端口信息， 获知 UE的接入位置信息， 向相应的 BPCF发送 S9*会话。 S9*会话中携带该 IP地址信息。
步骤 209、 PCRF向 PCEF返回响应。
这里， 该响应消息中可以带有 PCRF为该 IP-CAN会话制定的相应的 PCC策略。
步骤 210、 PGW向 ePDG返回代理绑定响应 , 完成 ePDG和 PDN-GW 之间的 PMIP或 GTP隧道的建立。
步骤 211、 ePDG收到消息后 , 向 UE返回 IP-Sec隧道建立成功。
步骤 212、 PCRF可能会发起资源接纳请求， 该步骤可以在步骤 208之 后。
步骤 213、 UE可能会发起其他 PDN连接的建立。
步骤 214、 PDN-GW发起 3GPP接入的 EPS承载释放。
一种上报固网接入信息的系统， 该系统包括上报单元， 上报单元用于 ePDG上报固网接入信息给 PCEF; PCEF将固网接入信息告知 PCRF。
这里， 固网接入信息包括： UE的位置信息。
这里，上报单元进一步用于 UE通过 WLAN接入移动核心网，向 ePDG 建立 IP安全隧道时， 由 ePDG上报 UE的位置信息给 PCEF; PCEF将 UE 的位置信息告知 PCRF。 这里， 该系统还包括会话建立单元， 会话建立单元用于 PCRF根据获 知的所述 UE的位置信息， 向与 UE的位置信息相对应的 BPCF, 发起 S9* 会话的建立。
这里， UE的位置信息具体包括 UE的标识、 和 /或隧道信息。
这里， UE的标识具体包括： UE的固网接入标识； 隧道信息具体包括：
UE和 ePDG建立 IP-Sec隧道时的 IP地址信息、 和 /或端口信息。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种上报固网接入信息的方法， 其特征在于， 该方法包括： 由演进 的分组数据网关（ ePDG )上报固网接入信息给策略和计费执行功能（ PCEF ); 所述 PCEF将所述固网接入信息告知策略和计费规则功能（ PCRF )。
2、根据权利要求 1所述的方法， 其特征在于， 所述固网接入信息包括： 用户设备 ( UE ) 的位置信息；
所述上报包括：所述 UE通过无线局域网络（ WLAN )接入移动核心网， 由所述 ePDG上报所述 UE的位置信息给所述 PCEF;所述 PCEF将所述 UE 的位置信息告知所述 PCRF。
3、根据权利要求 2所述的方法，其特征在于，该方法还包括：所述 PCRF 根据获知的所述 UE的位置信息，向与所述 UE的位置信息相对应的宽带策 略控制功能（BPCF )发起所述 S9*会话的建立。
4、 根据权利要求 2或 3所述的方法， 其特征在于， 所述 UE的位置信 息包括 UE的标识、 和 /或隧道信息。
5、 根据权利要求 4所述的方法， 其特征在于， 所述 UE的标识包括： UE的固网接入标识；
所述隧道信息包括： UE的本地（ Local ) IP地址信息；所述 UE的 Local IP地址信息包括： UE和 ePDG建立 IP-Sec隧道时使用的 IP地址和 /或端口 信息； 其中，
无 NAT的场景下， 所述 IP地址信息具体为 BRAS/BNG的为 UE分配 的公网 IP地址；
RG作为 NAT的场景下，所述 IP地址信息具体为 BRAS/BNG为 RG分 配的公网 IP地址；
BRAS/BNG做 NAT的场景下， 所述 IP地址信息具体为 BRAS/BNG的 地址。
6、 一种上报固网接入信息的系统， 其特征在于， 该系统包括： 上报单 元， 用于 ePDG上报固网接入信息给 PCEF; 所述 PCEF将所述固网接入信 息告知 PCRF。
7、根据权利要求 6所述的系统， 其特征在于， 所述固网接入信息包括： 用户设备 ( UE ) 的位置信息；
所述上报单元， 进一步用于所述 UE通过 WLAN接入移动核心网， 由 所述 ePDG上报所述 UE的位置信息给所述 PCEF; 所述 PCEF将所述 UE 的位置信息告知所述 PCRF。
8、 根据权利要求 7所述的系统， 其特征在于， 该系统还包括： 会话建 立单元， 用于所述 PCRF根据获知的所述 UE的位置信息， 向与所述 UE的 位置信息相对应的 BPCF发起所述 S9*会话的建立。
9、 根据权利要求 7或 8所述的系统， 其特征在于， 所述 UE的位置信 息包括 UE的标识、 和 /或隧道信息。
10、 根据权利要求 9所述的系统， 其特征在于， 所述 UE的标识包括： UE的固网接入标识；
所述隧道信息包括： UE的 Local IP地址信息； 所述 UE的 Local IP地 址信息包括： UE和 ePDG建立 IP-Sec隧道时使用的 IP地址和 /或端口信息； 其中，
无 NAT的场景下， 所述 IP地址信息具体为 BRAS/BNG的为 UE分配 的公网 IP地址；
RG作为 NAT的场景下，所述 IP地址信息具体为 BRAS/BNG为 RG分 配的公网 IP地址；
BRAS/BNG做 NAT的场景下， 所述 IP地址信息具体为 BRAS/BNG的 地址。
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