WO2012072002A1 - Procédé, dispositif et système de délestage de trafic - Google Patents

Procédé, dispositif et système de délestage de trafic Download PDF

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Publication number
WO2012072002A1
WO2012072002A1 PCT/CN2011/082877 CN2011082877W WO2012072002A1 WO 2012072002 A1 WO2012072002 A1 WO 2012072002A1 CN 2011082877 W CN2011082877 W CN 2011082877W WO 2012072002 A1 WO2012072002 A1 WO 2012072002A1
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WO
WIPO (PCT)
Prior art keywords
policy
local gateway
offloading
user
information
Prior art date
Application number
PCT/CN2011/082877
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English (en)
Chinese (zh)
Inventor
霍玉臻
吴瑟
刘建业
王卫斌
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN201010571136.XA external-priority patent/CN102487530B/zh
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
Publication of WO2012072002A1 publication Critical patent/WO2012072002A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]

Definitions

  • the present invention relates to the field of communications, and in particular to a data offloading method, device and system.
  • 3GPP 3rd Generation Partnership Project
  • EPS evolved Evolved Packet System
  • E-UTRAN Mobility Management Entity
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • HSS Home Subscriber Server
  • AAA 3GPP Authentication Authorization and Accounting
  • Policy and Charging Rules Function Policy and Charging Rules Function
  • PCRF Policy and Charging Rules Function
  • FIG. 1a is a first schematic diagram of a communication system architecture in accordance with the related art.
  • the mobility management entity is an MME, which is responsible for control planes such as mobility management, non-access stratum signaling processing, and user mobility management context management
  • S-GW is An access gateway device connected to the E-UTRAN, which forwards data between the E-UTRAN and the P-GW, and is responsible for buffering the paging waiting data
  • the P-GW is an EPS and a packet data network (Packet Data Network, referred to as It is the border gateway of the PDN network, which is responsible for the access of the PDN and the forwarding of data between the EPS and the PDN; both the S-GW and the P-GW belong to the core network gateway.
  • Packet Data Network Packet Data Network
  • the mobility management unit is the SGSN (Serving GPRS Support Node), and the core network gateway is the GGSN (Gateway GPRS Support Node, Gateway).
  • GPRS Support Node o
  • WLAN Wireless Local Area Networks
  • the mobility management unit is AC (Access Controller)
  • the core network gateway is BRAS (Broadband Remote Access Server, broadband access). Server) or AC.
  • the home base station is a small, low-power base station deployed in indoor places such as homes and offices. The main purpose is to provide users with higher service rates and lower the cost of using high-speed services, while making up for existing distributed Insufficient coverage of cellular wireless communication systems.
  • FIG lb is a second schematic diagram of a communication system architecture according to the related art.
  • the home base station can access the core network through the home network gateway gateway, or directly connect to the core network (as shown in Figure la).
  • the main functions of the home base station gateway are: verifying the security of the home base station, processing the registration of the home base station, performing operation and maintenance management on the home base station, configuring and controlling the home base station according to the operator's requirements, and responsible for exchanging the core network and the home Base station data.
  • the mobile communication system can also support the IP (Internet Protocol) offload function, the IP side of the network element on the wireless side, and the conditions for the user to subscribe to allow IP offloading.
  • IP Internet Protocol
  • the local access of the terminal to other IP devices or the Internet of the home network can be realized.
  • the implementation of IP offloading can provide strong support for IP offloading technology by adding a local gateway.
  • the local gateway acts as a gateway for local access to an external network (such as the Internet), providing address allocation and accounting.
  • the local gateway can be combined with the wireless side network element.
  • the local gateway may be an ISGW, which may be an L-SGW (Local SGW, Local SGW) and a P L-PGW (Local PGW, Local PGW), and may be a separate L-PGW, which may be a data offload function.
  • the entity may also be an ePDG (Evolved Packet Data Gateway).
  • the local gateway may be an ISGW, which may be an L-GGSN (Local GGSN, Local GGSN) and an L-SGSN (Local SGSN, Local SGSN), and may be a separate L-GGSN, which may be a data offloading functional entity. It can also be a PDG (Packet Data Gateway).
  • the local gateway may be an ISGW, and may be an L-BRAS (local Broadband Remote Access Server) or an AC (Access Controller).
  • the IP offloading can be implemented by adding or not adding a NAT address translation function on the local gateway, and is not limited to the core network access and the IP offload access function through one connection at the same time.
  • Figure la and Figure 1b also show the data flow of the core network connection and the data flow of the IP offload.
  • the local gateway is located in the mobility management entity and the core network. However, the local gateway cannot know how to offload, which may cause user data offload transmission errors in the subsequent offloading process, such as improper split ratio, which may result in user data packet loss or link. Blockage and other issues.
  • a primary object of the present invention is to provide a data offloading method, apparatus, and system, in which the local gateway cannot know the offloading policy for user data offloading processing in the related art, which may cause a user data offload transmission error in the subsequent offloading process, and further The problem of user data packet loss or link congestion.
  • a data offloading method is provided.
  • the data offloading method includes: in the PDN connection establishment process, the local gateway sends an offloading policy acquisition indication to the policy server or the core network gateway obtains the offloading policy from the policy server; the policy server divides the subscription information according to the user, or according to the user The offloading contract information and at least one of the following formulating the offloading strategy: service category information, quality of service information, address information, filter information, carrier policy information; the policy server sends the offloading policy to the local gateway, or forwards the offloading policy through the core network gateway For the local gateway; the local gateway performs the offload processing on the user data according to the offload policy.
  • the policy server sends the offloading policy to the local gateway
  • the method includes: the policy server sends the offloading policy to the local gateway by using the first interface, where the first interface is set between the policy server and the local gateway.
  • the policy server sends the offloading policy to the local gateway, and the method includes: sending, by the policy server, the offloading policy to the local gateway by using a Diameter message or forwarding the offloading policy to the local gateway by using a Generic Tunneling Protocol (GTP) message through the core network gateway.
  • GTP Generic Tunneling Protocol
  • the policy server sends the offloading policy to the local gateway through the first interface, including: when the traffic splitting policy is changed, the policy server sends the changed traffic splitting policy to the local gateway through the first interface; or, when the traffic splitting policy changes, The policy server forwards the changed traffic distribution policy to the local gateway through the core network gateway; the local gateway replaces the traffic distribution policy with the changed traffic distribution policy.
  • the policy server obtains user offload subscription information as follows: The policy server acquires subscription data of the user from the policy database, and the subscription data includes user offload subscription information.
  • the method includes: the local gateway determines that part of the user data in the user data is not split, and establishes a connection with the core network gateway; and the core network gateway processes the undivided part.
  • the method includes: the local gateway determines that part of the user data in the user data is not split, and establishes a connection with the core network gateway; and the core network gateway processes the undivided part.
  • User data is also provided.
  • the data offloading method includes: when the terminal attaches to the network, and the terminal performs routing area update or tracking area update, the authentication and authorization server divides the subscription information according to the user, or formulates a traffic distribution policy according to the user's offload subscription information and at least one of the following: Service category information, quality of service information, address information, filter information, carrier policy information; and an authentication authorization server sends a offloading policy to the mobility management entity or the target mobility management entity; the target mobility management entity sends the update by the user bearer When the traffic is diverted to the local gateway or when the user bearer is established, the mobility management entity sends the traffic distribution policy to the local gateway.
  • the local gateway performs traffic distribution processing on the user data according to the traffic distribution policy.
  • establishing a user bearer comprises: activating a PDP context or establishing a default bearer/proprietary bearer; updating the user bearer, including a PDP context update/default bearer update/private bearer update.
  • the local gateway performs the offloading process on the user data according to the offloading policy, including: the local gateway combines the offloading policy with the local policy to generate a trafficking policy rule; and the local gateway performs the trafficking process on the user data according to the trafficking policy rule.
  • a data offloading method is further provided.
  • the data offloading method includes: when establishing a user bearer, the local gateway initiates a traffic off policy request to the authentication authority server to actively obtain a traffic off policy; the authentication and authorization server splits the subscription information according to the user, or according to the user offloading subscription information and At least one of the following is to implement a traffic distribution policy: service category information, quality of service information, address information, filter information, and operator policy information; and an authentication authorization server sends a traffic distribution policy to the local gateway; the local gateway performs user data according to the traffic distribution policy. Split processing.
  • the authentication authorization server sends the offloading policy to the local gateway, and the method includes: the authentication authorization server sends the offloading policy to the local gateway through the second interface, where the second interface is set between the authentication authorization server and the local gateway.
  • the authentication authorization server sends the offloading policy to the local gateway through the second interface, including: when the offloading policy is changed, the authentication authorization server sends the changed offloading policy to the local gateway through the second interface;
  • the post-spunt strategy replaces the offload policy.
  • the data offloading method includes: in a relocation/handover, a service request, a routing area update or a tracking area update process, the source local gateway sends a splitting policy stored by the source local gateway to the target local gateway by establishing a user bearer;
  • the local gateway performs traffic offloading of user data according to the traffic distribution policy.
  • the target local gateway performs the offloading process on the user data according to the offloading policy, including: the target local gateway combines the offloading policy with the local policy to generate the offloading policy rule; the target local gateway performs the offloading process on the user data according to the offloading policy .
  • a local gateway is provided.
  • the local gateway includes: a first sending module, configured to send a offloading policy acquisition indication to the policy server during the PDN connection establishment process; the first offloading module is configured to perform user data according to the offloading policy formulated by the policy server Split processing.
  • the local gateway is further configured to replace the offloading policy previously formulated by the policy server by using the changed traffic policy of the policy server.
  • the local gateway is further configured to establish a connection with the core network gateway when it is determined that part of the user data in the user data is not offloaded.
  • a core network gateway is provided.
  • the core network gateway is configured to obtain a traffic off policy from the policy server during the PDN connection establishment process, and forward the traffic off policy to the local gateway.
  • the core network gateway is further configured to: when the local gateway determines that part of the user data in the user data is not offloaded, process part of the user data that is not offloaded.
  • a policy server is provided.
  • the policy server includes: a first formulation module, configured to offload subscription information according to the user, or, according to the user offload subscription information and at least one of the following: a service classification information, service quality information, address information, Filter information and carrier policy information; a second sending module, configured to send the offloading policy to a local gateway or forward the offloading policy to the local gateway by using the core network gateway.
  • the second sending module further includes: a first sending unit, configured to send the offloading policy to the local gateway by using a first interface, where the first interface is set in the policy server and the The second sending unit is configured to send the offloading policy to the local gateway by using a universal tunneling protocol GTP message through the core network gateway.
  • the first sending unit is further configured to: when the offloading policy is changed, send the changed offloading policy to the local gateway by using the first interface; When the offloading policy is changed, the changed offloading policy is forwarded to the local gateway through the core network gateway.
  • the policy server is further configured to: obtain the user offload subscription information according to the following steps: Obtain subscription data of the user from the policy database, where the subscription data includes the user offload subscription information.
  • a data offloading system is provided, including any of the foregoing policy servers, and further includes any one of the foregoing local gateways or any one of the foregoing core network gateways.
  • an authentication authorization server includes: a second setting module, configured to: when the terminal attaches to the network, when the terminal performs routing area update or tracking area update, according to the user offloading subscription information, or according to the user offloading subscription information And the following at least one of the following: the service category information, the service quality information, the address information, the filter information, and the operator policy information; and a third sending module, configured to send the offloading Policy to mobility management entity or target mobility management entity.
  • a mobility management entity is provided.
  • the mobility management entity according to the present invention is configured to send a traffic off policy formulated by the authentication authority server to the local gateway when the user bearer is established.
  • a destination mobility management entity is provided.
  • the mobility management entity is configured to update the traffic distribution policy set by the authentication authorization server to the local gateway by updating the user bearer.
  • a local gateway is provided.
  • the local gateway according to the present invention is configured to perform shunt processing on user data according to a traffic off policy formulated by the authentication authority server.
  • the local gateway is further configured to combine the traffic off policy and the local policy to generate a traffic split policy rule 1J; or, according to the traffic split policy rule, perform split processing on the user data.
  • a data shunting system is provided.
  • the data offloading system according to the present invention includes the above-described authentication authority server, the above mobility management entity, the above-described destination mobility management entity, and the local gateway of any of the above.
  • a local gateway is provided.
  • the local gateway includes: a fourth sending module, configured to: when the user bearer is established, initiate a traffic off policy request to the authentication and authorization server to actively obtain a traffic off policy, where the local gateway refers to the changed routing area
  • the local shunting module is configured to perform shunting processing on the user data according to the shunting policy formulated by the authentication and authorization server.
  • the local gateway is further configured to replace the offloading policy previously formulated by the policy server by using the changed traffiction policy of the authentication authorization server.
  • an authentication authorization server is provided.
  • the authentication authorization server includes: a third formulation module, configured to set the subscription information according to the user, or to formulate a traffic distribution policy according to the user offload subscription information and at least one of the following: service category information, quality of service Information, address information, filter information, and operator policy information; and a fifth sending module, configured to send the offloading policy to the local gateway.
  • the authentication authorization server is further configured to send the offloading policy to the local gateway by using a second interface, where the second interface is set between the authentication authorization server and the local gateway.
  • the authentication authorization server is further configured to send the changed traffic distribution policy to the local gateway by using the second interface when the traffic distribution policy is changed.
  • a data shunting system is provided.
  • the data offloading system according to the present invention includes any of the above-mentioned local gateways, and any of the above authentication authorization servers.
  • a source local gateway is provided.
  • the source local gateway according to the present invention is configured to send the traffic offloading policy stored by the source local gateway to the target local gateway by establishing a user bearer in a relocation/switching, service request, routing area update or tracking area update process.
  • a target local gateway is provided.
  • the target local gateway according to the present invention is configured to perform the offload processing on the user data according to the offloading policy sent by the source local gateway.
  • the target local gateway is further configured to combine the splitting policy and the local policy to generate a trafficking policy rule. According to the trafficking policy, the user data is offloaded.
  • a target local gateway is provided.
  • a data offloading system according to the present invention includes the above source local gateway, and any of the above target local gateways.
  • the local gateway in the process of establishing a packet data network connection, sends a traffic offmission policy acquisition instruction to the policy server or the core network gateway obtains a traffic off policy from the policy server, and the policy server sends the traffic off policy to the local gateway or sends the core network gateway through the core network gateway.
  • the user data is offloaded, and the local gateway cannot know the traffic splitting policy for user data offloading. This may result in user data offloading transmission errors in subsequent shunting processes, which may result in user data packet loss or link congestion.
  • the problem improves the accuracy of data shunting.
  • FIG. 1a is a first schematic diagram of a communication system architecture according to the related art
  • FIG. 1b is a second schematic diagram of a communication system architecture according to the related art
  • FIG. 2 is a data distribution method according to an embodiment of the present invention.
  • FIG. 3a is a schematic diagram of a system architecture for implementing data offloading according to an embodiment of the present invention
  • FIG. 3b is a schematic diagram of a system architecture for implementing data offloading according to an embodiment of the present invention
  • FIG. 4a is an implementation data according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a system architecture for implementing data offloading according to an embodiment of the present invention
  • FIG. 5 is a flowchart of Embodiment 1 of a local gateway obtaining a traffic off policy from a policy server according to an embodiment of the present invention
  • FIG. 6 is a flowchart of Embodiment 2 of a method for a local gateway to obtain a traffic distribution policy from a policy server according to an embodiment of the present invention
  • FIG. 1 is a flowchart of Embodiment 1 of a local gateway obtaining a traffic off policy from a policy server according to an embodiment of the present invention
  • FIG. 6 is a flowchart of Embodiment 2 of a method for a local gateway to obtain a traffic distribution policy from a policy server according to an embodiment of the present invention
  • FIG. 7 is a flowchart of Embodiment 3 of a local gateway obtaining a traffic distribution policy from a policy server according to an embodiment of the present invention
  • FIG. 9 is a flowchart of Embodiment 5 of a local gateway obtaining a traffic distribution policy from a policy server according to an embodiment of the present invention
  • FIG. 9 is a flowchart of Embodiment 5 of a local gateway obtaining a traffic distribution policy from a policy server according to an embodiment of the present invention
  • FIG. 11 is a flowchart of a second implementation manner of a mobility management entity delivering a traffic distribution policy to a local gateway according to an embodiment of the present invention
  • FIG. 12 is a flowchart of Embodiment 1 of an authentication authorization server delivering a traffic distribution policy to a local gateway according to an embodiment of the present invention
  • FIG. 13 is a second implementation manner of an authentication authorization server delivering a traffic distribution policy to a local gateway according to an embodiment of the present invention
  • Figure 14 is an authentication authorization server issued according to an embodiment of the present invention
  • FIG. 15 is a flowchart of Embodiment 1 of a Local Gateway Inter-Switching Traffic Divide Policy according to an embodiment of the present invention
  • FIG. 16 is a flow diagram of a local gateway transmission and distribution policy according to an embodiment of the present invention
  • FIG. 17 is a flowchart of Embodiment 3 of a local gateway inter-branch splitting policy according to an embodiment of the present invention
  • FIG. 18 is a first structural block diagram of a data offloading system according to an embodiment of the present invention.
  • a second structural block diagram of a data distribution system according to an embodiment of the present invention is a second structural block diagram of a data distribution system according to an embodiment of the present invention.
  • FIG. 20 is a third structural block diagram of a data distribution system according to an embodiment of the present invention;
  • FIG. 21 is a fourth diagram of a data distribution system according to an embodiment of the present invention.
  • FIG. 22 is a block diagram showing the structure of a local gateway according to an embodiment of the present invention
  • Figure 23 is a block diagram showing the structure of a policy server according to an embodiment of the present invention
  • Figure 24 is a block diagram showing the structure of a second transmitting module according to an embodiment of the present invention
  • 25 is a first structural block diagram of an authentication authorization server according to an embodiment of the present invention
  • FIG. 26 is a second structural block diagram of a local gateway according to an embodiment of the present invention
  • FIG. 27 is an authentication authorization according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a data offloading method according to an embodiment of the present invention. As shown in FIG.
  • Step 201 During the PDN connection establishment process, local The gateway sends the offloading policy acquisition instruction to the policy server or the core network gateway obtains the offloading policy from the policy server.
  • Step 202 The policy server divides the subscription information according to the user, or formulates a traffic distribution policy according to the user offload subscription information and at least one of the following: service category information And the service quality information, the address information, the filter information, and the operator policy information.
  • Step 203 The policy server sends the offload policy to the local gateway, or forwards the offload policy to the local gateway through the core network gateway.
  • Step 204 The local gateway according to the offload policy , the user data is offloaded.
  • the local gateway obtains the traffic offloading policy, and offloads the user data according to the traffic splitting policy, that is, when the traffic is offloaded, it can accurately know which link should be divided into traffic or user data, thereby ensuring the correctness of the traffic offloading. , to avoid user data packet loss or link congestion caused by user data offload transmission error.
  • a preferred embodiment of step S203 is described below.
  • the policy server sends the offloading policy to the local gateway through the first interface, where the first interface is set between the policy server and the local gateway.
  • the first interface is simply a name for the specific interface and protocol layer in the embodiment of the present invention. In practical applications, any other name may be used, as long as the corresponding functions are the same, for example.
  • the policy server sends the traffic distribution policy to the core network gateway through the Diameter message, and forwards the traffic distribution policy to the local gateway through the GTP message through the core network element.
  • the policy server sends the offloading policy to the local gateway through the first interface, including: when the traffic off policy is changed, the policy server sends the changed traffic off policy to the local gateway through the first interface; the local gateway replaces the split traffic policy by using the changed Diversion strategy.
  • the policy server sends the changed offloading policy to the core network gateway, and the core network gateway forwards to the local gateway; the local gateway replaces the offloading policy by using the changed splitting policy.
  • the policy server can obtain the subscription data of the user from the policy database, and the subscription data includes the user offload subscription information.
  • the user's subscription data can also be obtained from other network elements or devices or databases, depending on the specific situation.
  • the local gateway determines that some user data in the user data is not split, and establishes a connection with the core network gateway; Part of the user data that is shunted.
  • Solution 2 This embodiment provides a data offloading method, where the method includes the following steps: Step 1: When the terminal attaches to the network, and the terminal performs routing area update or tracking area update, the authentication and authorization server divides the subscription information according to the user, or According to the user's off-sale contract information and at least one of the following, a traffic distribution policy is formulated: service category information, quality of service information, address information, filter information, and operator policy information.
  • Step 2 The authentication authorization server sends the offloading policy to the mobility management entity or the target mobility management entity.
  • Step 3 The target mobility management entity sends a offloading policy to the local gateway by updating the user bearer or when the user bearer is established, the mobility management entity sends the offloading policy to the local gateway.
  • Step 4 The local gateway performs traffic distribution processing on the user data according to the traffic distribution policy.
  • establishing a user bearer comprises: activating a packet data protocol (PDP) context or establishing a default bearer/proprietary bearer; updating the user bearer, including: PDP context update/establishing a default bearer/private bearer update.
  • PDP packet data protocol
  • the local gateway combines the traffic distribution policy with the local policy to generate a traffic distribution policy rule.
  • the local gateway performs traffic distribution processing on the user data according to the traffic distribution policy.
  • the third embodiment of the present invention provides a method for data offloading.
  • the method includes the following steps: Step 1: When a user bearer is established, the local gateway initiates a traffic off policy request to the authentication and authorization server, and actively obtains a traffic off policy.
  • Step 4 The local gateway performs traffic distribution processing on the user data according to the traffic distribution policy. Preferably, a preferred embodiment of step 3 is described below.
  • the authentication authorization server sends the traffic distribution policy to the local gateway through the second interface, where the second interface is set between the authentication authorization server and the local gateway.
  • the second interface is simply a name for the specific interface and protocol layer in the embodiment of the present invention. In practical applications, any other name may be used, as long as the corresponding functions are the same, for example. , can be called X interface.
  • a preferred embodiment of the authentication authorization server transmitting the offloading policy to the local gateway through the second interface is described below.
  • the authentication authorization server sends the changed traffic distribution policy to the local gateway through the second interface.
  • the local gateway replaces the traffic distribution policy with the changed traffic distribution policy.
  • Solution 4 This embodiment provides a data offloading method, where the method includes the following steps: Step 1.
  • the source local gateway establishes a user bearer.
  • the offload policy stored by the source local gateway is sent to the target local gateway.
  • a preferred embodiment of step 2 is described below.
  • the target local gateway combines the traffic distribution policy with the local policy to generate a traffic distribution policy rule.
  • the target local gateway performs traffic distribution processing on the user data according to the traffic distribution policy rule.
  • the embodiment of the present invention can enable a local gateway to dynamically obtain a correct and appropriate offloading policy to implement IP service offloading, including
  • the following solutions are provided: Solution 1: During the PDN connection establishment process, the local gateway requests a traffic offload policy from the policy server.
  • the policy server distributes the subscription information according to the user, and can also use the service category information, the service quality information, the address information, and the filter information.
  • the operator policy and other information are used to formulate the traffic policy, and the traffic policy is sent to the local gateway; the local gateway performs traffic offloading according to the obtained traffic policy rule; or, in the process of establishing the PDN connection, the core network gateway
  • the policy server requests the traffic distribution policy, and the policy server divides the subscription information according to the user, and also formulates the traffic distribution policy according to the service category information, the service quality information, the address information, the filter information, the operator policy, and the like, and divides the traffic.
  • the core network gateway forwards the offloading policy to the local gateway; the local gateway performs the offload processing on the user data according to the obtained shunt policy rule;
  • Option 2 when the user attaches or the routing area update/tracking area is updated
  • the authentication authorization server delivers the offloading policy (subscribing to the user, or assigning a traffic distribution policy based on the user's traffic distribution, service type information, service quality information, address information, filter information, and operator policy) to the mobility management entity.
  • the mobility management entity forwards the offload policy to the local gateway;
  • Option 3 When the user bearer is established (PDP context activation or default)
  • the bearer/private bearer When the bearer/private bearer is established, the local gateway initiates a traffic off policy request to the authentication and authorization server, and obtains the traffic offloading policy from the authentication and authorization server.
  • Solution 4 The target local gateway obtains the traffic off policy from the source local gateway. The following is a description of a specific embodiment. The following embodiment uses a home base station to directly connect to the UTRAN system as an example to describe a related procedure for the local gateway to obtain a traffic off policy in the IP offload connection communication system.
  • All embodiments of the present invention are applicable to a WLAN system, an E-UTRAN network, and a core network in which a home base station is connected through a home base station gateway.
  • the core network gateway is a GGSN.
  • the core network gateway refers to the SGW and the PGW.
  • the core network gateway is a BRAS or AC.
  • the access system is different, the messages are different, but the effect is similar.
  • the process of obtaining the offload policy for the local gateway is similar to the following embodiment.
  • the wireless side network element may be a base station, a home base station, an RNC (Radio Network Controller), a traffic off gateway, a traffic off function entity, a home base station gateway, and an AP (Access Point).
  • the mobility management entity may be an MME, an MSC (Mobile Switching Center), an SGSN, a home base station gateway, or an AC.
  • the IP offloading can be local IP access to the user's local network, local IP access to the company's local network, local IP access to the Internet, Internet traffic shunting, and specific IP data offloading.
  • the user offload subscription information includes one or more of the following information, but is not limited to the following information: whether to allow the offloading based on the APN (Access Point Name) subscription, based on the CSG (Closed Subscriber Group) , Closed User Group) Whether the contract is allowed to be offloaded, whether the branching is allowed based on the base station subscription, and whether the user is allowed to perform the offload based on the subscription.
  • the traffic distribution policy may be a user offloading subscription information, or may be a policy server/authentication authorization server, according to the user offloading subscription information, and may also be based on service category information, quality of service information, address information, and filters.
  • a diversion strategy for information such as information and operator strategies.
  • the radio side network elements serving the terminal are collectively referred to as the source radio side network elements, and the mobility management entities serving the terminal services are collectively referred to as source mobility.
  • the management entity, the local gateway for Terminal Services, is collectively referred to as the source local gateway.
  • the target radio side network element/target mobility management entity/target local gateway may be the same as the source radio side network element/source mobility management entity/source local gateway.
  • the authentication authorization server in the embodiment of the present invention may be an HSS/HLR
  • the policy server may be a PCRF
  • the policy library may be an SPR.
  • the network element may be other network elements having the same function.
  • FIG. 3a and 3b are schematic diagrams 1 and 2 of a system architecture for implementing data offloading according to an embodiment of the invention, respectively.
  • the architecture illustrated in Figure 3a and Figure 3b is applicable to the scenario where the local gateway obtains the traffic off policy from the policy server.
  • the difference between Fig. 3a and Fig. 3b is that, in Fig. 3a, the home base station is directly connected to the core network, and in Fig. 3b, the home base station accesses the core network through the logical base unit of the home base station gateway.
  • a Gx interface is added between the local gateway and the policy server to transfer the traffic offload policy from the policy server to the local gateway.
  • the gateway uses the Gx interface to obtain the traffic offloading policy from the policy server.
  • the policy server can split the subscription information according to the user, and can also formulate a traffic distribution policy according to the service category information, the service quality information, the address information, the filter information, the operator policy, and the like.
  • the traffic distribution policy is delivered to the local gateway through the Gx interface, and can also carry the quality of service policy and/or the charging policy.
  • the local gateway performs offload processing on the user data according to the obtained traffic distribution policy.
  • the policy server needs to send the changed traffic policy to the local gateway through the Gx interface.
  • the policy server serving the local gateway may be the same as the policy server serving the core network gateway, or may be different, or may be separately deployed for the local gateway service.
  • the policy server can be a PCRF or other server with the ability to make policy rules.
  • the Gx interface between the local gateway and the policy server is just a name for describing the specific interface and protocol layer in the present invention. In practical applications, any other name may be used, as long as the corresponding function is used. The same effect can be.
  • 4a and 4b are schematic diagrams 3 and 4 of a system architecture for implementing data offloading according to an embodiment of the invention, respectively. The architecture illustrated in Figure 4a and Figure 4b is applicable to the scenario where the local gateway obtains the offload policy from the authentication and authorization server.
  • Fig. 4a and Fig. 4b The difference between Fig. 4a and Fig. 4b is that, in Fig. 4a, the home base station is directly connected to the core network, and in Fig. 4b, the home base station accesses the core network through the logical base unit of the home base station gateway.
  • an X interface is added between the local gateway and the authentication and authorization server to transfer the user offload policy from the authentication and authorization server to the local gateway.
  • the local gateway obtains the user offloading policy from the authentication and authorization server through the X interface.
  • the authentication authorization server sends the user offloading policy to the local gateway through the X port, and saves the information of the local gateway.
  • the local gateway performs traffic offloading according to the obtained traffic distribution policy.
  • the authentication authorization server needs to send the changed user offloading policy to the local gateway through the X interface.
  • the local gateway needs to notify the authentication authority to delete the local gateway information saved in the authentication and authorization server.
  • the X interface between the local gateway and the authentication authorization server is just a name for the specific interface and protocol layer in the present invention for convenience of description. In practical applications, any other name may be used, as long as it corresponds.
  • the function of the function is the same.
  • Step 501 The local gateway receives a PDP context request from the terminal, and the terminal initiates a PDP activation request, and the non-access stratum message is sent to the mobility management entity by the base station, and is forwarded by the mobility management entity to the local gateway.
  • Step 502 The local gateway sends a PDP activation request to the core network gateway, where the user equipment (User Equipment) identifier, PDP type, QoS (Quality of Service) information, and charging information are carried.
  • the core network gateway verifies the parameters carried in the PDP activation request message and authorizes the QoS parameters carried in the request.
  • Step 503 The core network gateway sends an IP-CAN (IP Connectivity Access Network) session establishment request to the policy server, where the UE identity information, and/or the UE IP address are carried.
  • IP-CAN IP Connectivity Access Network
  • the policy can be a new type of independent policy or some of the QoS policies.
  • the policy server sends an IP-CAN session setup response, which includes the QoS policy and the charging rule.
  • the message always carries the user offload policy rule.
  • the core network gateway returns a PDP activation response to the local gateway, where the tunnel end identifier, the authorized QoS parameter, and the like are allocated.
  • the local gateway sends an IP-CAN session establishment or an IP-CAN session modification request to the policy server, where the UE identifier information, and/or the UE IP address, and/or the APN, and/or the bearer identifier are carried.
  • the offloading policy may be used to obtain the indication, which is used to indicate that the policy server local gateway needs to obtain the user's offloading policy.
  • the trafficking policy obtaining indication may be a new indication, or may be represented by the carrying or not of the original parameter.
  • Step 509 The policy server associates the IP-CAN session established by the core network with the IP-CAN session established by the local gateway, and sends the user offload policy defined in step 506 to the IP-CAN session establishment response message.
  • the local gateway receives the user offload policy, it saves it locally, and performs the offload processing on the data of subsequent users according to the offload policy.
  • Step 510 continuing the subsequent normal process.
  • step 508 can be performed in parallel with step 502.
  • FIG. 6 is a flow chart of Embodiment 2 of a local gateway acquiring a traffic distribution policy from a policy server according to an embodiment of the present invention. This embodiment is based on the system architecture shown in FIG. 3a and FIG.
  • Step 601 The local gateway receives a PDP context request from the terminal, and the terminal initiates a PDP activation request, where the non-access stratum message is sent to the mobility management entity by the base station, and is forwarded by the mobility management entity to Local gateway.
  • Step 602 The local gateway sends an IP-CAN session establishment request to the policy server, where the UE carries the UE identification information, and/or the UE IP address, and/or the APN, and/or the bearer identifier.
  • the policy server goes to the policy database (for example, SPR) to obtain the subscription data of the user, which includes the user offload subscription information, and is used to formulate related rules.
  • the policy server formulates a QoS policy and a charging rule, and according to the user's offloading subscription information, the traffic policy may also be configured according to the service category information, the service quality information, the address information, the filter information, and the operator policy.
  • the traffic splitting policy may be a new type of independent rule or some of the QoS policies.
  • the policy server sends an IP-CAN session setup response, which includes the user offload policy, QoS policy, and billing rules.
  • Step 606 After receiving the user offloading policy, the local gateway saves the local, and performs the offloading process on the data of the subsequent user according to the offloading policy. The local gateway determines whether all the services of the user are offloaded according to the user shunting policy rule. If it is split, step 607 to step 610 are not executed.
  • Step 607 When the judgment of the step 606 is no, that is, the user has the core network service, the local gateway sends a PDP activation request to the core network gateway, where the UE carries the UE identifier, the PDP type, the QoS information, the charging information, and the like.
  • the core network gateway verifies the parameters carried in the PDP activation request message and authorizes the QoS parameters carried in the request.
  • Step 608 The core network gateway sends an IP-CAN session establishment request/IP-CAN session modification request to the policy server, where the UE identification information, and/or the UE IP address are carried.
  • Step 610 The core network gateway returns a PDP activation response to the local gateway, where the tunnel end identifier assigned to the UE, the authorized QoS parameter, and the like are carried. Step 611, continuing the subsequent normal process.
  • Embodiment 3 FIG. 7 is a flow chart of Embodiment 3 of a local gateway obtaining a traffic distribution policy from a policy server according to an embodiment of the present invention. The embodiment is based on the system architecture shown in FIG. 3a and FIG. 3b, and is applicable to a scenario in which the policy server updates the user offloading policy after the user offloading policy is changed due to the change of the information of the traffic distribution policy.
  • Step 701 After the user splits the subscription and the information about the traffic distribution policy, the policy server re-establishes the user traffic distribution policy, and the new user traffic distribution policy is different from the original user traffic distribution policy; the policy server is connected according to the affected PDN.
  • Step 702 The policy server sends a policy update request to the local gateway, where the UE identifier, and/or the UE IP address, and/or the APN, and And the bearer identifier, and/or the affected service data stream, and the modified traffic policy; wherein the policy update request may be a new message, or may add a traffic splitting policy to the existing message; Step 703, the local gateway After receiving the user's traffic distribution policy, the user's traffic distribution policy is updated, and the data of subsequent users is offloaded according to the traffic distribution policy. Sending a policy update response to the policy server; Step 704, continuing the subsequent normal process.
  • FIG. 8 is a flow chart of Embodiment 4 of a local gateway obtaining a traffic distribution policy from a policy server according to an embodiment of the present invention. The embodiment is based on the system architecture shown in FIG. 3a and FIG.
  • 3b is applicable to a scenario in which the local gateway acquires the traffic off policy when the terminal requests the PDP context to be activated.
  • a core network connection is always established, and the traffic distribution policy is brought to the local gateway through the GTP message.
  • Step 801 The local gateway receives a PDP context request from the terminal, and the terminal initiates a PDP activation request, where the non-access stratum message is sent to the mobility management entity by the base station, and is forwarded by the mobility management entity to a local gateway;
  • Step 802 The local gateway sends a PDP activation request to the core network gateway, where the UE carries the UE identifier, the PDP type, the QoS information, the charging information, and the like; the core network gateway verifies the parameters carried in the PDP activation request message, and Authorizing the QoS parameters carried in the request;
  • Step 803 The core network gateway sends an IP-CAN session establishment request to the policy server, where the UE identifier information, and/or the UE IP address are carried;
  • Step 804 to Step 805 the policy server goes
  • the policy database for example, SPR (subscriber profile register)
  • SPR subscriber profile register
  • the subscription data of the user includes user offload subscription information.
  • Step 806 The policy server formulates a QoS policy and a charging rule, and According to the user's diversion of contract information, At the same time, a traffic splitting policy can be formulated according to service class information, service quality information, address information, filter information, and operator policy.
  • the traffic splitting policy can be a new type of independent rule or a certain one of the QoS policies.
  • the policy server sends an IP-CAN session establishment response, which includes a QoS policy, a charging rule, and a user offloading policy;
  • Step 807 The core network gateway returns a PDP activation response to the local gateway, where the information about the tunnel end identifier assigned to the UE, the authorized QoS parameter, and the like, and carries the user offloading policy obtained from the policy server; after the local gateway receives the user offload policy And saving the data locally, and performing the offloading process on the data of the subsequent user according to the offloading policy; Step 808, continuing the subsequent normal process.
  • Embodiment 9 is a flow chart of Embodiment 5 of a local gateway obtaining a traffic distribution policy from a policy server according to an embodiment of the present invention.
  • the embodiment is based on the system architecture shown in FIG. 3a and FIG. 3b, and is applicable to a scenario in which the policy server updates the user offloading policy after the user offloading policy is changed due to the change of the information of the traffic distribution policy.
  • a core network connection is always established, and the traffic distribution policy is brought to the local gateway through the GTP message.
  • Step 901 After the information about the traffic distribution policy is set, the policy server re-establishes the user traffic distribution policy, and the new user traffic distribution policy is different from the original user traffic distribution policy; the policy server is connected according to the affected PDN. And/or the service data flow, to determine whether it is necessary to notify the core network gateway, here is judged as yes.
  • Step 902 The policy server sends a policy update request to the core network gateway, where the UE identifier, and/or the UE IP address, and/or the APN, and/or the bearer identifier, and/or the affected service data flow, and the modified After the offloading policy, the policy update request may be a new message, or may be added to the existing message.
  • Step 903 The core network gateway sends a policy update response to the policy server.
  • Step 904 The core network gateway sends a PDP context update request to the local gateway, and carries the modified offload policy.
  • Step 905 After receiving the user offloading policy, the local gateway updates the user shunting policy saved locally, and performs shunting processing on the data of the subsequent user according to the shunting policy; and sends a PDP context update response to the core network gateway. Step 906, continuing the subsequent normal process.
  • the PDP activation/PDP modification/PDP deactivation is performed, or the activation/bearer modification/bearer deactivation process is carried out, and the process is a technology well known to those skilled in the art, and details are not described herein.
  • FIG. 10 is a flowchart of Embodiment 1 of a mobility management entity delivering a traffic distribution policy to a local gateway according to an embodiment of the present invention.
  • the embodiment is based on the system architecture shown in FIG. 1a and FIG. 1b, and is applicable to when a terminal requests a PDP context activation.
  • the local gateway obtains the scenario of the user offloading policy from the mobility management entity.
  • the method includes the following steps: Step 1001: The terminal accesses the GRPS network, and the attaching process is performed first.
  • the mobility management entity obtains the subscription data of the user, including the user offloading policy, and the user offloading policy may be
  • the user terminal initiates a PDP activation request, and the non-access stratum message is brought to the mobility management entity via the base station.
  • Step 1002 The mobility management entity selects a suitable local gateway for the UE.
  • the mobility management entity sends a PDP activation request to the local gateway, where the UE carries the UE identifier, the PDP type, the QoS information, the charging information, and the tunnel end identifier.
  • the message needs to carry the user offloading policy obtained from the authentication and authorization server in step 1001; after receiving the user offloading policy, the local gateway saves the local, and performs the offloading processing on the data of the subsequent users according to the offloading policy; the local gateway may also be combined.
  • the traffic distribution policy and the local policy are used to formulate traffic distribution policy rules, which are used to offload the data of subsequent users.
  • Step 1003 The local gateway sends a PDP context activation request to the core network gateway, where the UE carries the UE identifier, the PDP type, the QoS information, the charging information, and the tunnel end identifier.
  • the core network gateway performs the parameters carried in the PDP context activation request message. verification.
  • Step 1004 The core network gateway returns a PDP context activation response to the local gateway, where the tunnel end identifier assigned to the UE, the authorized QoS parameter, and the like are carried.
  • Step 1006 The local gateway sends an RAB dominating message to the base station.
  • Step 1007 If the base station accepts the QoS parameters sent by the core network gateway, the base station initiates an RRC connection establishment process.
  • Step 1009 The mobility management entity determines whether to send a PDP context update request to the core network gateway according to whether a direct tunnel is established, and if the transmission, carries the tunnel end identifier of the base station; if the QoS is inconsistent with the QoS delivered by the previous core network gateway Then, the mobility management is that he notifies the core network gateway through the PDP context update process.
  • Step 1010 The SGSN returns a PDP activation response message to the UE. The procedure is applicable to the PDP activation initiated by the UE in UTRAN/GERAN, the secondary PDP activation, the PDP initiated by the network, and the secondary PDP activation procedure.
  • FIG. 11 is a flowchart of Embodiment 2 of a mobility management entity delivering a traffic distribution policy to a local gateway according to an embodiment of the present invention. This embodiment is based on the system architecture shown in FIG. 1 and FIG. 1B, and is applicable to the scenario where the local gateway obtains the user offloading policy from the mobility management entity when the routing area is updated.
  • the method includes the following steps: Step 1101: A terminal in an idle state initiates a routing area update process periodically or because a routing area changes due to mobility; and the terminal sends a non-access stratum (Non-Access-Stratum, NAS) message-routing area update request to the terminal.
  • the target radio side network element after the terminal moves, the radio side network element may be different from the source radio side network element; the radio side network element selects the target mobility management entity for the terminal, and includes the routing area update request message in the initial user.
  • the message is sent to the target mobility management entity.
  • Step 1102 The target mobility management entity obtains an address of the original mobility management entity according to the routing area update request message, and initiates a context acquisition process to the original mobility management entity.
  • the target mobility management entity sends a context request message to the source mobility management entity. .
  • Step 1103 The source mobility management entity sends a context response message to the target mobility management entity.
  • Step 1104 The target mobility management entity may initiate an authentication and authentication process for the terminal.
  • Step 1105 The target mobility management entity sends a context accept message to the source mobility management entity.
  • Step 1106 The target mobility management entity initiates a PDP context update request to the source local gateway.
  • Step 1108 The source local gateway sends a PDP context creation request to the target local gateway, and carries the core network gateway information.
  • Step 1109 The target local gateway sends a PDP context update request to the core network gateway.
  • Step 1110 The core network gateway replies to the PDP context update response.
  • Step 1111 The target local gateway replies to the source local gateway with a PDP context establishment response.
  • Step 1112 The source local gateway initiates a PDP context update response to the target mobility management entity, and carries the target local gateway information.
  • Step 1113 The target mobility management entity and the authentication authorization server perform a location update process to send a location update request.
  • Step 1114 The authentication authorization server and the source mobility management entity perform a location cancellation process.
  • the authentication authorization server inserts the user data into the target mobility management entity, including the user offloading policy; the user offloading policy may be the user offloading subscription information, or the authentication and authorization server may further distribute the subscription information according to the user, and may also A traffic off policy based on information such as service class information, quality of service information, address information, filter information, and operator policy.
  • the authentication authority server responds to the target mobility management entity with a location update confirmation message.
  • the target mobility management entity initiates a PDP context update process to the target local gateway, and sends a PDP context update request, carrying the user offload policy obtained in step 1115.
  • the target local gateway After receiving the user offload policy, the target local gateway saves the local, and according to The traffic splitting policy is used to perform the offloading process on the data of the subsequent users.
  • the local gateway can also combine the traffic splitting policy with the local policy to formulate a traffic splitting policy rule, which is used to perform traffic offloading processing on subsequent users.
  • the target local gateway responds to the PDP context update response message.
  • the target mobility management entity initiates a routing area update accept message to the terminal via the target radio side network element.
  • the terminal replies to the routing area update completion message. In this embodiment, when the terminal initiates the routing area update process, the mobility management entity changes as an example to illustrate how the target local gateway obtains the user offload subscription information in the routing area update process.
  • FIG. 12 is a flowchart of Embodiment 1 of an authentication authorization server delivering a traffic distribution policy to a local gateway according to an embodiment of the present invention. This embodiment is based on the system architecture shown in FIG. 4a and FIG.
  • the method includes the following steps: Step 1201: The local gateway receives a PDP context request from the terminal; the terminal initiates a PDP activation request, and the non-access stratum message is sent to the mobility management entity by the base station, and is forwarded by the mobility management entity to Local gateway.
  • Step 1203 The authentication authorization server saves local gateway information served by the user.
  • Step 1204 The authentication authorization server sends the user offloading policy to the local gateway in the shunt policy response message.
  • the user shunting policy may be the user shunting subscription information, or the authentication authorization server may perform the shunting subscription information according to the user, and may also be based on A traffic distribution policy is defined by the traffic class information, the service quality information, the address information, the filter information, and the carrier policy.
  • the local gateway After receiving the user traffic distribution policy, the local gateway saves the local traffic, and offloads the data of subsequent users according to the traffic distribution policy.
  • FIG. 13 is a flowchart of Embodiment 2 of a method for implementing an offloading policy to a local gateway by an authentication authorization server according to an embodiment of the present invention. The embodiment is based on the system architecture shown in FIG. 4a and FIG. 4b, and is applicable to a scenario in which the authentication authorization server delivers the changed user offloading policy to the local gateway when the user's offloading subscription changes.
  • Step 1301 If the offloading policy is the user's offloading subscription information, after the user's offloading subscription information is changed, the authentication and authorization server determines whether to insert the offloading policy to the local gateway according to the saved local gateway information for the user service. If the authentication authorization server stores the local gateway information for the user, the authentication authorization server needs to initiate the process of inserting the traffic distribution policy; if the traffic distribution policy is a policy formulated by the authentication authorization server according to the traffic distribution information and other information, It is necessary to determine whether the traffic splitting policy is changed. After the user splits the contract and the information about the traffic splitting policy, the policy server re-defines the user traffic splitting policy, and the new user traffic splitting policy is different from the original user traffic splitting policy.
  • Step 1302 The authentication authorization server sends a request for inserting a splitting policy to the local gateway, where the modified offloading policy is carried.
  • Step 1303 After receiving the user offloading policy, the local gateway updates the user shunting policy that is saved locally, and performs the offloading process on the data of the subsequent user according to the offloading policy.
  • the local gateway may also combine the offloading policy with the local policy to formulate the diversion policy rule. It is used to offload the data of subsequent users; the local gateway returns an insert shunt policy response to the authentication authority server.
  • Embodiment 10 FIG.
  • Step 1401 When the PDP context of the user on the local gateway is deleted, the local gateway needs to notify the authentication authorization server to delete the saved local gateway information serving the user; this step may be to delete the last one on the local gateway.
  • the PDP context notifies the authentication authorization server to delete all the local gateway information corresponding to the APN, or may notify the authentication authorization server to delete the local gateway information corresponding to the APN each time the PDP context is deleted.
  • Step 1402 The local gateway sends a request for deleting the local gateway information to the authentication authority server.
  • Step 1403 The authentication authority server deletes the local gateway information.
  • Step 1404 The authentication authority server returns a response to delete the local gateway information to the local gateway.
  • FIG. 15 is a flowchart of Embodiment 1 of a Local Gateway Inter-Switching Traffic Diversion Policy according to an embodiment of the present invention. The present embodiment is based on FIG. 1a, FIG. 1b, FIG. 3a, FIG. 3b, FIG. 34a, FIG.
  • the system architecture is applicable to the scenario where the traffic distribution policy is transmitted between the source local gateway and the target local gateway when relocation occurs.
  • the method includes the following steps: Step 1501: The radio side network element determines that relocation needs to be initiated.
  • Step 1507 The source mobility management entity sends a relocation command to the source radio side network element.
  • Step 1508 The source radio side network element sends a relocation execution message to the target radio side network element.
  • Step 1509 After receiving the relocation execution, the target radio side network element sends a relocation detection to the target mobility management entity.
  • Step 1510 The target radio side network element sends the radio access network mobility information to the terminal. After the terminal reconfigures, the target radio side network element returns an acknowledgement message.
  • Step 1511 The target radio side network element sends a relocation complete notification message to the target mobility management entity.
  • Step 1512 The source mobility management entity and the target mobility management entity exchange relocation forward completion messages.
  • Step 1513 The target mobility management entity sends a PDP context update request message to the source local gateway.
  • Step 1514 The source local gateway selects a target local gateway, and the selection manner may be: selecting by using terminal location information.
  • the target local gateway can also combine the traffic splitting policy with the local policy to formulate a traffic splitting policy rule, which is used to perform traffic offloading processing on subsequent users.
  • step 1517 the core network gateway replies with a PDP context update response.
  • step 1518 The target local gateway replies to the source local gateway with a PDP context establishment response.
  • Step 1519 The source local gateway initiates a PDP context update response to the target mobility management entity, and carries the target local gateway information.
  • Step 1520 The target mobility management entity may update the locally saved local gateway information, and update the radio bearer to the target wireless side network element to carry the target local gateway information.
  • a change of the mobility management entity in the handover process is taken as an example to illustrate how the target local gateway obtains the user offload subscription information in the handover process. This process also applies to scenarios where the mobility management entity does not change during the handover process.
  • FIG. 16 is a flowchart of Embodiment 2 of a method for transmitting a traffic distribution between local gateways according to an embodiment of the present invention.
  • the embodiment is based on the system architecture shown in FIG. 1a, FIG. 1b, FIG. 3a, FIG. 3b, FIG. 4a and FIG. 4b, and is applicable to a scenario in which a traffic distribution policy is transmitted between a source local gateway and a target local gateway in a service request process.
  • the method includes the following steps: Step 1601: The terminal sends an RRC connection establishment request to the radio side network element.
  • Step 1602 The radio side network element performs an RRC connection establishment.
  • Step 1603 The terminal sends a service request message to the mobility management entity via the radio side network element.
  • Step 1604 The mobility management entity sends a radio bearer assignment request to the radio side network element, and the mobility management entity, the radio side network element, and the terminal perform a radio bearer assignment and establishment process.
  • Step 1605 The mobility management entity sends a PDP context update request message to the source local gateway.
  • Step 1606 The source local gateway selects a target local gateway, and the selection manner may be: selecting by using terminal location information.
  • Step 1607 The source local gateway sends a PDP context creation request to the target local gateway, and carries the core network gateway information; and carries the user offloading policy saved in the source local gateway before the user moves; the target local gateway saves the user offload after receiving the user offloading policy.
  • the policy is used to perform the offloading process on the data of the subsequent users according to the offloading policy.
  • the target local gateway may also combine the traffic splitting policy with the local policy to formulate a trafficking policy rule, which is used to perform traffic offloading processing on subsequent users.
  • Step 1608 The target local gateway sends a PDP context update request to the core network gateway.
  • Step 1609 the core network gateway replies to the PDP context update response.
  • Step 1610 The target local gateway replies to the source local gateway with a PDP context establishment response.
  • Step 1611 The source local gateway initiates a PDP context update response to the mobility management entity, and carries the target local gateway information.
  • Step 1612 The mobility management entity may update the locally saved local gateway information, and update the radio bearer to the radio side network element to carry the target local gateway information.
  • FIG. 17 is a flowchart of Embodiment 3 of a method for transmitting a traffic distribution between local gateways according to an embodiment of the present invention. The embodiment is based on the system architectures shown in FIG. 1a, FIG. 1b, FIG. 3a, FIG. 3b, FIG. 4a and FIG.
  • Step 4b is suitable for transmitting a traffic distribution policy between the source local gateway and the target local gateway in the routing area update process.
  • Steps 1701-1707 the same steps 1101-1107.
  • Step 1708 The source local gateway sends a PDP context creation request to the target local gateway, and carries the access gateway information. And carrying the user offloading policy saved on the source local gateway before the user moves; after receiving the user offloading policy, the target local gateway saves the user offloading policy, and performs shunting processing on the subsequent users according to the offloading policy; the target local gateway may also be combined.
  • the traffic distribution policy and the local policy are used to formulate traffic distribution policy rules, which are used to offload the data of subsequent users.
  • FIG. 18 is a first structural block diagram of a data offloading system according to an embodiment of the present invention. As shown in FIG. 18, the shunting system includes: a policy server 1801 ; Local Gateway 1802 or Core Network Gateway 1803. This will be described in detail below.
  • the policy server 1801 is configured to split the subscription information according to the user, or determine according to the user offload subscription information and at least one of the following: service category information, quality of service information, address information, filter information, and operator policy information; and according to the traffic off policy And performing the offloading process on the user data; sending the offloading policy to the local gateway 1802 or forwarding the offloading policy to the local gateway through the core network gateway 1803.
  • the local gateway 1802 is connected to the policy server 1801, and is configured to send a splitting policy acquisition indication to the policy server 1801 during the PDN connection establishment process; and perform user offloading processing according to the splitting policy; the core network gateway 1803 is connected to the policy server 1801. Set to obtain a traffic off policy from the policy server 1801.
  • the policy server 1801 can also be configured to send a offload policy to the local gateway 1802 through the first interface, wherein the first interface is disposed between the policy server 1801 and the local gateway 1802.
  • policy server 1801 may also be configured to send a offload policy to local gateway 1802 via core tunnel gateway 1803 via a generic tunneling protocol GTP message.
  • the policy server 1801 may be configured to send the changed traffic distribution policy to the local gateway 1802 through the first interface or forward the changed traffic distribution policy to the local gateway through the core gateway 1803. 1802;
  • the local gateway 1802 is further configured to replace the offloading policy by using the changed offloading policy.
  • the policy server 1801 may be further configured to: obtain the user offload subscription information as follows: Obtain the user's subscription data from the policy database, and the subscription data includes the user offload subscription information.
  • the local gateway 1802 is further configured to establish a connection with the core network gateway 1803 when it is determined that part of the user data is not offloaded in the user data; and the core network gateway 1803 is configured to process part of the user data that is not offloaded.
  • the embodiment of the present invention provides a data offloading system.
  • FIG. 19 is a second structural block diagram of a data offloading system according to an embodiment of the present invention. As shown in FIG. 19, the system includes an authentication and authorization server 1901 and a mobility management entity 1902.
  • the destination mobility management entity 1903 and the local gateway 1904 are described in detail below.
  • the authentication authorization server 1901 is configured to set the subscription information according to the user when the terminal attaches to the network, the terminal performs the routing area update, or the tracking area is updated. Or, according to the user offload subscription information and at least one of the following: a traffic classification policy: service category information, quality of service information, address information, filter information, carrier policy information; and sending a traffic off policy to the mobility management entity 1902 or destination mobility
  • the management entity 1903 is configured to: when the user bearer is established, send the offloading policy to the local gateway 1904; the destination mobility management entity 1903 is configured to send the offloading policy to the local gateway 1904 by updating the user bearer; the local gateway 1904 , Set as User data is offloaded according to the traffic distribution policy.
  • the local gateway 1904 may be configured to combine the offloading policy with the local policy to generate a trafficking policy rule; or perform traffic offloading according to the trafficking policy rule.
  • the embodiment of the present invention further provides a data distribution system.
  • FIG. 20 is a third structural block diagram of a data distribution system according to an embodiment of the present invention. As shown in FIG. 20, the system includes: an authentication authorization server 2001, a local gateway 2002. The foregoing structure is described in detail: The authentication authorization server 2001 is configured to offload subscription information according to the user, or to formulate a traffic distribution policy according to the user offload subscription information and at least one of the following: service category information, quality of service information, address information The filter information and the carrier policy information are sent to the local gateway.
  • the local gateway 2002 is connected to the authentication and authorization server 2001, and is configured to initiate a traffic policy request to the authentication and authorization server 2001 when the user bearer is established. Obtaining a traffic distribution policy, where the local gateway refers to a local gateway of the changed routing area; according to the traffic distribution policy, the user data is offloaded.
  • the authentication authority server 2001 can also be configured to send the offloading policy to the local gateway 2002 through the second interface, wherein the second interface is disposed between the authentication authority server 2001 and the destination local gateway 2002.
  • the authentication authorization server 2001 may further be configured to send the changed traffic distribution policy to the destination local gateway 2002 through the second interface when the traffic offload policy is changed; the local gateway 2002 is further configured to utilize the changed traffic splitting policy. Replace the offloading strategy.
  • FIG. 21 is a fourth structural block diagram of a data distribution system according to an embodiment of the present invention.
  • the system includes: a source local gateway 2101 and a destination local gateway 2102.
  • the source local gateway 2101 is configured to send a traffic policy of the source local gateway storage to the target local gateway by establishing a user bearer in the process of relocation/switching, service request, routing area update or tracking area update; destination local gateway 2102, Set to receive the offload policy stored by the source local gateway 2101.
  • the destination local gateway 2102 may be configured to combine the offloading policy with the local policy to generate a trafficking policy rule. According to the trafficking policy rule, the user data is offloaded.
  • the embodiment of the present invention further provides a local gateway.
  • the schematic diagram of the structure is as shown in FIG. 22, and includes: a first sending module 2201, configured to send a splitting policy to the policy server during the PDN connection establishment process.
  • the first offloading module 2202 is configured to perform the offloading process on the user data according to the offloading policy formulated by the policy server.
  • the local gateway is further configured to replace the traffic policy previously defined by the policy server with the changed traffic policy of the policy server.
  • the local gateway is further configured to establish a connection with the core network gateway when it is determined that part of the user data in the user data is not offloaded.
  • the embodiment of the present invention further provides a core network gateway, which is configured to obtain a traffic distribution policy from the policy server during the PDN connection establishment process of the packet data network, and forward the obtained traffic distribution policy to the local gateway.
  • the core network gateway may also be configured to determine, when the local gateway determines that part of the user data in the user data is not offloaded, to process part of the user data that is not offloaded.
  • an embodiment of the present invention further provides a policy server, and a schematic structural diagram thereof is shown in FIG.
  • the first setting module 2301 is configured to split the subscription information according to the user, or set the traffic distribution policy according to the user offload subscription information and at least one of the following: service category information, quality of service information, address information, filter information, and operator policy information;
  • the second sending module 2302 is configured to send the offloading policy to the local gateway or forward the offloading policy to the local gateway through the core network gateway.
  • the second sending module 2302 may further include: a first sending unit 2401, configured to send the offloading policy to the local gateway by using the first interface, where the first interface is set in The second sending unit 2402 is configured to send the offloading policy to the local gateway through the universal tunneling protocol GTP message through the core network gateway.
  • the first sending unit 2401 is further configured to send the changed offloading policy to the local gateway through the first interface when the offloading policy is changed; the second sending unit 2402 is further configured to change when the offloading policy is changed.
  • the changed offloading policy is forwarded to the local gateway through the core network gateway.
  • the policy server is further configured to: obtain the user offload subscription information as follows: Obtain the user's subscription data from the policy database, and the subscription data includes the user offload subscription information.
  • the embodiment of the present invention further provides a data offloading system, including the policy server of any of the foregoing, and the local gateway of any one of the foregoing or the core network gateway of any one of the foregoing, 18 is shown.
  • an embodiment of the present invention further provides an authentication authorization server.
  • the schematic diagram of the structure is as shown in FIG. 25, and includes: a second formulation module 2501, configured to attach a network to the terminal, and perform routing area update or tracking area on the terminal.
  • the user divides the subscription information according to the user, or formulates a traffic distribution policy according to the user's offload subscription information and at least one of the following: service category information, quality of service information, address information, filter information, and operator policy information; and third sending module 2502 , set to send the offload policy to the mobility management entity or the target mobility management entity.
  • the embodiment of the present invention further provides a mobility management entity, which is configured to send a traffic distribution policy defined by the authentication authorization server to the local gateway when establishing a user bearer.
  • the embodiment of the present invention further provides a destination mobility management entity, which is configured to update a traffic offloading policy that is sent by the user authorization bearer to the local gateway.
  • the embodiment of the present invention further provides a local gateway, which is configured to perform split processing on user data according to a traffic off policy formulated by the authentication and authorization server.
  • the local gateway is further configured to combine the offloading policy with the local policy to generate a trafficking policy rule.
  • the user data is offloaded according to the trafficking policy rule.
  • an embodiment of the present invention further provides a data offloading system, including the above-mentioned authentication authority server, the above mobility management entity, the above-mentioned destination mobility management entity, and the local gateway of any of the foregoing, and the structure thereof.
  • the schematic is shown in Figure 19.
  • the embodiment of the present invention further provides a local gateway, and the schematic diagram of the structure is as shown in FIG. 26, including: a fourth sending module 2601, configured to initiate a trafficking policy request to the authentication authority server when establishing a user bearer
  • the local traffic gateway is the local gateway of the changed routing area.
  • the second traffic distribution module 2602 is configured to perform the traffic processing on the user data according to the traffic distribution policy defined by the authentication authorization server.
  • the local gateway is further configured to replace the offloading policy previously formulated by the policy server by using the changed authorization policy of the authentication authorization server.
  • an embodiment of the present invention further provides an authentication authorization server, which is shown in FIG.
  • a third formulation module 2701 configured to be configured to offload subscription information according to a user, or to offload according to a user.
  • the subscription information and the following at least one of the following: the service category information, the service quality information, the address information, the filter information, and the operator policy information; and the fifth sending module 2702, configured to send the offloading policy to the local gateway.
  • the authentication authorization server is further configured to send the offloading policy to the local gateway through the second interface, wherein the second interface is disposed between the authentication authorization server and the local gateway.
  • the authentication authorization server is further configured to send the changed traffic distribution policy to the local gateway through the second interface when the traffic off policy changes.
  • the embodiment of the present invention further provides a data offloading system, including the local gateway of any of the above, and the authentication and authorization server of any of the above, and the structure diagram thereof is shown in FIG.
  • the embodiment of the present invention further provides a source local gateway, which is configured to send a source local to a target local gateway by establishing a user bearer in a relocation/handover, a service request, a routing area update, or a tracking area update process.
  • the traffic offloading policy of the gateway is configured to perform offload processing on user data according to a traffic off policy sent by the source local gateway.
  • the target local gateway is further configured to combine the traffic distribution policy with the local policy to generate a traffic distribution policy rule.
  • the traffic distribution policy rule the user data is offloaded.
  • the embodiment of the present invention further provides a data offloading system, including the source local gateway, and the target local gateway of any of the foregoing, and a schematic structural diagram thereof is shown in FIG. 21.
  • the present invention achieves the following technical effects:
  • the local gateway acquires the traffic off policy, and offloads the user data according to the traffic off policy, that is, When diverting, you can know exactly which link should be divided into traffic or user data, thus ensuring the correctness of the traffic distribution, and avoiding problems such as user data packet loss or link congestion caused by user data offload transmission error.
  • the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • the invention is not limited to any particular combination of hardware and software.
  • the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention porte sur un procédé, un dispositif et un système de délestage de trafic. Le premier type du procédé de délestage de trafic comprend les opérations suivantes : durant un processus d'établissement d'une connexion de réseau de données par paquets (PDN), une passerelle locale transmet une indication servant à obtenir une politique de délestage à un serveur de politique, ou une passerelle de cœur de réseau obtient la politique de délestage auprès du serveur de politique (201) ; le serveur de politique décide de la politique de délestage, sur la base des informations d'abonnement au délestage d'utilisateur, ou sur la base des informations d'abonnement au délestage d'utilisateur et d'au moins un élément parmi les suivants : des informations de la classe de service, des informations de qualité de service, des informations d'une adresse, des informations d'un filtre et des informations d'une politique d'opérateur (202) ; le serveur de politique transmet la politique de délestage à la passerelle locale, ou achemine la politique de délestage jusqu'à la passerelle locale par l'intermédiaire de la passerelle de cœur de réseau (203) ; la passerelle locale effectue un traitement de délestage pour le trafic de l'utilisateur sur la base de la politique de délestage (204). Grâce à la présente invention, le problème de perte de trafic d'utilisateur ou d'encombrement de liaison, qui est provoqué par la possible existence d'une erreur de transmission du trafic d'utilisateur délesté durant le processus du délestage suivant en raison du fait que la passerelle locale est incapable d'obtenir la politique de délestage pour effectuer un traitement de délestage pour le trafic de l'utilisateur, peut être résolu.
PCT/CN2011/082877 2010-12-02 2011-11-24 Procédé, dispositif et système de délestage de trafic WO2012072002A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101552682A (zh) * 2008-04-03 2009-10-07 华为技术有限公司 策略和计费控制信息控制方法及系统

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101552682A (zh) * 2008-04-03 2009-10-07 华为技术有限公司 策略和计费控制信息控制方法及系统

Non-Patent Citations (2)

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Title
"Technical Specification Group Services and System Aspects, Local IP Access and Selected IP Traffic Offload (Release 10), 3rd Generation Partnership Project", 3GPP 23.829 V1.3.0, 1 October 2010 (2010-10-01) *
HUAWEI: "Selected IP Traffic Offload for UMTS at Iu-PS", 3GPP TSG SA WG2 MEETING #75, 4 September 2009 (2009-09-04), Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_sa/WG2_Arch/TSGS2_75_Kyoto/Docs/S2-095961> *

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