WO2012028008A1 - 一种异构网络的控制方法和系统 - Google Patents

一种异构网络的控制方法和系统 Download PDF

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Publication number
WO2012028008A1
WO2012028008A1 PCT/CN2011/075561 CN2011075561W WO2012028008A1 WO 2012028008 A1 WO2012028008 A1 WO 2012028008A1 CN 2011075561 W CN2011075561 W CN 2011075561W WO 2012028008 A1 WO2012028008 A1 WO 2012028008A1
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Prior art keywords
racf
user
pcrf
session
release
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PCT/CN2011/075561
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English (en)
French (fr)
Inventor
尤建洁
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中兴通讯股份有限公司
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Publication of WO2012028008A1 publication Critical patent/WO2012028008A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W12/00Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06Authentication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/50Address allocation
    • H04L61/5007Internet protocol [IP] addresses
    • H04L61/503Internet protocol [IP] addresses using an authentication, authorisation and accounting [AAA] protocol, e.g. remote authentication dial-in user service [RADIUS] or Diameter
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M15/00Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/66Policy and charging system
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W60/00Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/30Connection release
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/26Network addressing or numbering for mobility support

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and system for controlling a heterogeneous network. Background technique
  • multimode terminals need to implement the attachment control and policy management of heterogeneous networks, so that multimode terminals can access other networks and conduct services. Since different network connections have different characteristics and transmission capabilities, they are better able to meet the diverse needs of users.
  • NGN Next Generation Network
  • 3G networks are deployed with their own resource control systems and business functions.
  • 3G users eg, multimode mobile terminals
  • the RACF Resource Admission Control Function
  • PCRF Policy and Charging Rule Function
  • Figure 1 shows the interaction between NGN and 3G.
  • the interface between RACF and PCRF is named S9*. This interface is mainly used for information exchange between RACF and PCRF.
  • RACF is by ITU-T (International Telecommunication
  • RACF consists of two parts, namely, Policy Decision Functional Entity (PD-FE) and Transport Resource Control Function Entity (Transport Resource). Control Functional Entity, TRC-FE ).
  • PD-FE Policy Decision Functional Entity
  • TRC-FE Transport Resource Control Function Entity
  • SCF Service Control Functions
  • NACF Network Attachment Control Functions
  • PCC Policy Control and Charging
  • the PCC is located between the service control layer and the access/bearer layer. It implements a certain QoS (Quality of Service) control mechanism for the characteristics of the mobile access network.
  • QoS Quality of Service
  • the functions provided include: policy control based on user-defined information, and service-based Billing control for data streams.
  • the main functional entity of the PCC is the Policy and Charging Rule Function (PCRF).
  • PCRF Policy and Charging Rule Function
  • the PCRF provides network control functions for the detection, gating, QoS, and per-flow accounting of service data flows for PCEF (Policy and Charging Enforcement Function).
  • the main object of the present invention is to provide a control method and system for a heterogeneous network to ensure that 3G users can successfully attach in the NGN.
  • a method for controlling a heterogeneous network comprising:
  • NACF Based on the 3rd Generation Partnership Project 3GPP AAA Server through the network attachment control function NACF receives the user ID;
  • the user, the NACF, and the 3GPP AAA server perform mutual authentication and 4 authorization according to the user identifier;
  • the NACF allocates an IP address to the user.
  • the method further includes:
  • Nano control function RACF
  • the service control function SCF queries the NACF for user IP connection information according to the IP address and/or the user identifier.
  • the session control is also performed.
  • the method further includes: when the session control is a session establishment, the method further includes:
  • the RACF checks the user after receiving the user access list; if it is determined that the user is initially attached and is a 3GPP user, the RACF to the policy and charging rule function
  • the PCRF sends a session setup message to establish a session between the RACF and the PCRF.
  • the method further includes:
  • the user triggers the PE-FE to send a resource request message to the RACF, requesting admission control decision;
  • the RACF After receiving the resource request message, the RACF performs an authorization check, and sends the resource request message to the PCRF after the authorization check is passed;
  • the PCRF performs policy decision based on the user subscription list and service information, formulates an initial policy rule, and notifies the RACF;
  • the RACF makes a final policy decision based on the authorization check result and the policy rule of the PCRF.
  • the method further includes: when the session control is a session release, the method further includes:
  • the session release process is triggered by the NACF, the policy enforcement function entity PE-FE, the SCF, the RACF, or the PCRF.
  • the session release process includes:
  • the NACF detects that the user is offline, releases the corresponding IP connection, and sends a call message to the RACF, indicating that the user's IP connection is released; the RACF checks the user after receiving the offline notification message, and determines the decision.
  • Sending a resource release message to the PE-FE to release the resources occupied by the PE-FE; when the triggering entity is the PE-FE, the session release process includes:
  • the PE-FE can no longer provide the requested resource, sending a resource release notification message to the RACF; the RACF checks the user after receiving the resource release notification message, and releases the RACF and the a session between PCRFs;
  • the session release process includes:
  • the SCF sends a resource release message to the RACF; the RACF checks the user after receiving the resource release message, and sends the PCRF to the PCRF when the user is determined to be the 3GPP user. a session release message to release a session between the RACF and the PCRF; the RACF sends a resource release message to the PE-FE to release resources occupied by the PE-FE;
  • the session release process includes:
  • the RACF further sends a resource release message to the PE-FE to release resources occupied by the PE-FE;
  • the session release process includes:
  • the PCRF subscribes to the RACF to subscribe to an event; when the RACF detects that the event that the PCRF subscribes to, the event report message is sent to the PCRF; the PCRF receives the event report message of the RACF.
  • the RACF sends a session release message to release the session between the RACF and the PCRF.
  • the RACF sends a resource release message to the PE-FE to release resources occupied by the PE-FE.
  • a control system for a heterogeneous network comprising a 3GPP AAA server, a NACF, a user;
  • the 3GPP AAA server is configured to receive a user identifier by using the NACF, and perform mutual authentication and authorization with the NACF and the user according to the user identifier;
  • NACF is configured to send the user identifier to the 3GPP AAA server; and allocate an IP address to the user after the authentication and authorization are passed.
  • the system also includes an SCF; wherein
  • the NACF is further configured to: push the user access list to the RACF;
  • the SCF is configured to query the NACF for user IP connection information by using the IP address and/or the user identifier.
  • the NACF is further configured to: perform session control after assigning an IP address to the user.
  • the method and system of the present invention can ensure that 3G users can successfully attach in the NGN; based on this, the subsequent session establishment, policy provisioning, and session release processing between the RACF and the PCC can be performed, so that the policy control and management are not affected.
  • FIG. 2 is a flow chart of attaching a 3GPP terminal to an NGN according to an embodiment of the present invention
  • FIG. 3 is a flowchart of establishing a session between a RACF and a PCC according to an embodiment of the present invention
  • FIG. 4 is a flow chart of providing a policy according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a session release triggered by a NACF according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a session release triggered by a PE-FE (Policy Execution Function Entity) according to an embodiment of the present invention
  • FIG. 7 is a flowchart of a session release triggered by an SCF according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a session release triggered by a RACF event according to an embodiment of the present invention
  • FIG. 9 is a flowchart of a session release triggered by a RACF event according to another embodiment of the present invention
  • FIG. 10 is a PCRF according to an embodiment of the present invention
  • Event-triggered session release flow chart
  • FIG. 11 is a flowchart of a session release triggered by a PCRF event according to another embodiment of the present invention
  • FIG. 12 is a schematic diagram of a control flow of a heterogeneous network according to an embodiment of the present invention. detailed description
  • the NACF in the NGN supports a 3GPP authentication and authorization mechanism, and the NACF interacts with the 3GPP AAA server, and the 3GPP user identity transfer in the NGN is performed.
  • the 3G user performs authentication and authorization based on the 3GPP authentication and authorization mechanism, and the IMSI (International Mobile Subscriber Identity) is reported to the 3GPP AAA server through the NACF.
  • IMSI International Mobile Subscriber Identity
  • the 3GPP user identifier has various manifestations, such as IMSI, IMEI (International Mobile Equipment Identity), and the like. The following is only an example of IMSI.
  • the NACF assigns an IP address to the 3G user and pushes the user access list to the RACF; wherein the user access list includes: an IP address, and/or an IMSI, and/or a user QoS list, a logical access identifier, and/or a physics Access identity, and/or access network type.
  • the SCF queries the NACF for the user IP connection information according to the IP address and/or the IMSI.
  • the user IP connection information includes: a logical access identifier, and/or a physical access identifier, and/or a terminal type, and/or an access network type. , and / or RACF's IP address.
  • the NACF pushes the user access list to the RACF.
  • the RACF checks the user, and if the user is initially attached and is a 3GPP user, Then, the RACF sends a session establishment message to the PCRF to establish a session between the RACF and the PCRF.
  • the session establishment message carries: an IP address, and/or an IMSI, and/or an access network type.
  • the PCRF replies to the RACF with a session establishment confirmation message between the RACF and the PCRF.
  • the user requests the QoS resource through the transport layer signaling, and the behavior triggers the PE-FE to generate the resource request message, and sends the request to the RACF to request the admission control decision.
  • the resource request message carries the flow description and/or the QoS parameter.
  • the RACF After receiving the resource request message, the RACF sends the service information to the SCF if there is no local service information of the user. Obtain the business information of the user.
  • the RACF performs an authorization check. Specifically, the RACF checks whether the flow description, the QoS resource, and the service information are consistent with the network policy rule; and further includes the RACF for resource availability check.
  • the RACF further sends the resource request message to the PCRF.
  • the PCRF makes policy decisions based on user subscription lists and business information, and formulates initial policy rules.
  • the PCRF replies to the resource request response message to the RACF, which contains the initial policy rules formulated by the PCRF.
  • the RACF makes the final policy decision based on the authorization check result and the policy rules of the PCRF.
  • the RACF replies to the PE-FE with a resource request response message, and the PE-FE installs the final policy decision made by the RACF.
  • the PE-FE replies to the user through transport layer signaling.
  • the specific operation process will include different operation methods depending on different scenarios, such as:
  • the NACF When the user is offline, the NACF sends a call message to the RACF, indicating that the user's IP connection is released, and the notification message carries: an IP address and/or an IMSI.
  • the RACF After receiving the offline notification message, the RACF checks the user. If the user is a 3GPP user, the RACF sends a session release message to the PCRF to release the session between the RACF and the PCRF. : IP address and / or IMSI.
  • the RACF sends a resource release message to the PE-FE to release the resources occupied by the PE-FE.
  • the resource release notification message is sent to the RACF.
  • the release notification message carries: an IP address and/or an IMSI.
  • the RACF checks the user. If the user is a 3GPP user, the RACF sends a session release notification message to the PCRF to release the session between the RACF and the PCRF. : IP address and / or IMSI.
  • the PCRF replies to the session release response message.
  • the SCF sends a resource release message to the RACF, where the message carries an IP address and/or IMSI.
  • the RACF After receiving the resource release message, the RACF checks the user. If the user is a 3GPP user, the RACF sends a session release message to the PCRF to release the session between the RACF and the PCRF.
  • the session release message carries: IP Address and / or IMSI.
  • the RACF sends a resource release message to the PE-FE to release the resources occupied by the PE-FE.
  • the PCRF sends an event to the RACF.
  • the session release message is sent to the PCRF to release the session between the RACF and the PCRF.
  • the session release message carries: an IP address, and/or an IMSI. And/or event information.
  • the PCRF replies to the session release response message.
  • the RACF sends a resource release message to the PE-FE to release the resources occupied by the PE-FE.
  • Method five
  • the PCRF subscribes to the RACF to send an event report message to the PCRF when the RACF detects the event that the PCRF subscribes to.
  • the report message carries an IP address, and/or IMSI, and/or event information.
  • the PCRF After receiving the event report message, the PCRF sends a session release message to the RACF to release the session between the RACF and the PCRF.
  • the release message carries the IP address and/or IMSI.
  • the RACF sends a resource release message to the PE-FE to release the resources occupied by the PE-FE.
  • FIG. 2 is a flow chart of attaching a 3GPP terminal in an NGN according to an embodiment of the present invention.
  • the process includes the following steps:
  • the 3G user performs authentication and authorization based on the 3GPP authentication and authorization mechanism, and the IMSI reports to the 3GPP AAA server through the NACF.
  • the step further includes authorizing access to the network based on the transmission subscription list; wherein the transmission subscription list can be downloaded from the 3GPP AAA server to the NACF.
  • the access network configuration based on the transmission subscription list is performed; wherein the inventory information includes: a logical connection identifier, and/or an IMSI, and/or a transmission resource subscription information (from 3GPP AAA list of AAA downloads or default configuration list), and/or edge PE-FE device identification.
  • NACF assigns IP address information to the user and establishes a mapping between the assigned IP address and the logical connection identifier.
  • the NACF associates the mapping information with the IMSI and the transmission subscription list, and pushes the associated information to the RACF; wherein the associated information includes: an IP address, and/or an IMSI, and/or a user QoS list, a logical access identifier, And/or physical access identity, and/or access network type.
  • the SCF queries the NACF for the user IP connection information according to the IP address and/or the IMSI; wherein the user IP connection information includes: a logical access identifier, and/or a physical access identifier, and/or a terminal type, and/or Enter the network type, and/or the IP address of the RACF.
  • FIG. 3 is a flowchart of a session establishment between an RACF and a PCC according to an embodiment of the present invention, where the process includes the following steps:
  • Step 301 The 3G user completes the attach in the NGN.
  • Step 302 The NACF pushes the user access list to the RACF.
  • the user access list includes: an IP address, and/or an IMSI, and/or a user QoS list, a logical access identifier, and/or a physics. Access identity, and/or access network type.
  • Step 303 After receiving the user access list pushed by the NACF, the RACF checks the user.
  • Step 304 If the RACF decides that the user is an initial attachment and is a 3GPP user, the RACF sends a session establishment message to the PCRF to establish a session between the RACF and the PCRF.
  • the session establishment message carries: an IP address, and/or an IMSI. , and / or access network type.
  • the PCRF replies to the session establishment response message.
  • FIG. 4 is a flowchart of a policy providing according to an embodiment of the present invention, where the process includes the following steps:
  • Step 401 The user requests QoS resources through transport layer signaling.
  • Step 402 The request in step 401 triggers the PE-FE to generate a resource request message.
  • Step 403 The PE-FE sends a resource request message to the RACF to request an admission control decision.
  • the resource request message carries a flow description and/or a QoS parameter.
  • Step 404 After receiving the resource request message, the RACF obtains the service information of the user from the SCF if there is no service information of the user locally.
  • Step 405 The RACF performs an authorization check. Specifically, the RACF checks whether the flow description, QoS resources, and service information are consistent with the network policy rule; and also includes the RACF for resource availability check.
  • Step 406 If the authorization check is passed, the RACF further sends the resource request message to the PCRF, because the user is a 3GPP user, where the resource request message carries: an IP address, and/or an IMSI, and/or access Network type, and/or flow description, and/or QoS parameters, and/or service information.
  • Step 407 The PCRF makes policy decisions based on the user subscription list and service information, and formulates initial policy rules.
  • Step 408 The PCRF replies with a resource request response message to the RACF, where the message includes the PCRF.
  • the initial policy rules were developed.
  • Step 409 The RACF makes a final policy decision according to the authorization check result of step 405 and the policy rule of step 408.
  • Step 410 The RACF replies to the PE-FE with a resource request response message, and the PE-FE installs the final policy decision formulated by the RACF.
  • Step 411 The PE-FE replies to the user by using the transport layer signaling.
  • FIG. 5 is a flowchart of a NACF-triggered session release according to an embodiment of the present invention, where the process includes the following steps:
  • Step 501 The NACF detects that the user is offline and releases the corresponding IP connection.
  • Step 502 Step 501: The NACF sends a call message to the RACF, indicating the user's
  • IP connection is released, and the notification message carries: IP address and/or IMSI.
  • Step 503 After receiving the offline notification message of the user, the RACF checks the user.
  • Step 504 If the RACF decides that the user is a 3GPP user, the RACF sends a session release message to the PCRF to release the session between the RACF and the PCRF.
  • the session release message carries: an IP address and/or an IMSI.
  • Step 505 The RACF sends a resource release message to the PE-FE to release the resources occupied by the PE-FE.
  • FIG. 6 is a flowchart of a PE-FE triggered session release according to an embodiment of the present invention, where the process includes the following steps:
  • Step 601 When the PE-FE can no longer provide the requested resource, the resource release notification message is triggered.
  • Step 602 The PE-FE sends a resource release notification message to the RACF, where the release notification message carries: an IP address and/or an IMSI.
  • Step 603 After receiving the resource release notification message, the RACF checks the user.
  • Step 604 If the RACF decides that the user is a 3GPP user, send a session to the PCRF.
  • the notification message is released to release the session between the RACF and the PCRF; wherein the session release notification carries: an IP address and/or an IMSI.
  • the PCRF replies to the session release response message.
  • FIG. 7 is a flowchart of a session release triggered by an SCF according to an embodiment of the present invention, where the process includes the following steps:
  • Step 701 When the user leaves a service, the SCF is triggered to send a resource release message.
  • Step 702 The SCF sends a resource release message to the RACF, where the message carries an IP address and/or IMSI.
  • Step 703 After receiving the resource release message, the RACF checks the user.
  • Step 704 If the RACF decides that the user is a 3GPP user, the RACF sends a session release message to the PCRF to release the session between the RACF and the PCRF.
  • the session release message carries: an IP address and/or an IMSI.
  • Step 705 The RACF sends a resource release message to the PE-FE to release the resources occupied by the PE-FE.
  • FIG. 8 is a flowchart of a session release triggered by an RACF event according to an embodiment of the present invention, where the process includes the following steps:
  • Step 801 The PCRF sends an event message to the RACF, where the event message carries: an IP address, and/or IMSI, and/or event information; event information such as traffic, time, and the like.
  • Step 802 The RACF replies to the PCRF with an event response message.
  • FIG. 9 is a flowchart of a session release triggered by an RACF event according to another embodiment of the present invention, where the process includes the following steps:
  • Step 901 When the RACF detects that the event sent by the PCRF is met, the RACF is triggered to send a release message.
  • Step 902 The RACF sends a session release message to the PCRF to release the session between the RACF and the PCRF.
  • the session release message carries: an IP address, and/or an IMSI, and/or event information.
  • the PCRF replies to the session release response message.
  • FIG. 10 is a flowchart of a session release triggered by a PCRF event according to an embodiment of the present invention. The process includes the following steps:
  • Step 1001 The PCRF subscribes to the RACF, and the subscription event message carries: an IP address, and/or IMSI, and/or event information; event information such as traffic, time, and the like.
  • Step 1002 When the RACF detects that the event subscribed by the PCRF is met, the event report message is sent to the PCRF.
  • the report message carries an IP address, and/or an IMSI, and/or event information.
  • FIG. 11 is a flowchart of a session release triggered by a PCRF event according to another embodiment of the present invention, where the process includes the following steps:
  • Step 1001 After receiving the event report message of the RACF, the PCRF triggers the session release message.
  • the release message carries the IP address and/or IMSI.
  • Step 1003 The RACF sends a resource release message to the PE-FE to release the resources occupied by the PE-FE.
  • FIG. 12 is a schematic diagram of a control flow of a heterogeneous network according to an embodiment of the present invention, where the process includes the following steps:
  • Step 1210 Receive a user identity through the NACF based on the 3GPP AAA server.
  • Step 1220 The user, the NACF, and the 3GPP AAA server perform mutual authentication according to the user identifier.
  • Step 1230 After the authentication is passed, the NACF allocates an IP address to the user.
  • the control technology of the heterogeneous network of the present invention can ensure that 3G users can successfully attach in the NGN, and the subsequent session establishment and policy provision between the RACF and the PCC can be performed. Processing such as session release does not affect policy control and management.

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Abstract

本发明公开了一种异构网络的控制方法和系统,均可基于第三代合作伙伴计划AAA服务器通过网络附着控制功能接收用户标识;并由用户、所述网络附着控制功能、所述第三代合作伙伴计划AAA服务器根据所述用户标识,进行交互认证;在认证通过后,所述网络附着控制功能为用户分配IP地址。本发明方法和系统,均可保证3G用户能够在NGN中成功附着;基于此还可以进行后续的RACF与PCC间的会话建立、策略提供、会话释放等处理,因而不会影响策略控制和管理。

Description

一种异构网络的控制方法和系统 技术领域
本发明涉及通信领域, 具体涉及一种异构网络的控制方法和系统。 背景技术
随着网络技术的发展和用户对业务的需求, 多模终端要实现异构网络 的附着控制和策略管理, 使得多模终端可以接入其它网络并开展业务。 由 于不同的网络连接具有不同的特性和传输能力, 因此能够更好地满足用户 多业务多样的需求。
NGN (下一代网络)、 3G 网络均部署实施了各自的资源控制系统和业 务功能。 3G用户 (如: 多模移动终端)通过 NGN网络接入并访问 NGN网 络中的业务。 NGN中的 RACF (资源接纳控制功能) 实体需要与移动网络 中的 PCRF ( Policy and Charging Rule Function, 策略与计费规则功能)实体 交互, 以实施策略管理。 图 1给出了 NGN与 3G的交互图, RACF与 PCRF 之间的接口取名为 S9* , 该接口主要用于 RACF与 PCRF间的信息交互。
RACF 是 由 ITU-T ( International Telecommunication
Union- Telecommunications standardization sector, 国际电信联盟电信标准匕 部门)制定的有关资源接纳控制的标准。 在 ITU-T发布的 Y.2111标准中, 提供了 RACF的功能框架: RACF由两部分组成, 分别是策略决策功能实 体(Policy Decision Functional Entity, PD-FE )和传输资源控制功能实体 ( Transport Resource Control Functional Entity, TRC-FE )。 PD-FE基于网络 策略规则、 业务控制功能( Service Control Functions, SCF )提供的业务信 息、 网络附着控制功能 ( Network Attachment Control Functions , NACF )提 供的传输层签约信息, 以及 TRC-FE提供的资源可用性决策结果, 做出资 源接纳控制的最后决策。
3GPP ( The 3rd Generation Partnership Project, 第三代合作伙伴计划) 从移动接入角度出发, 提出了 PCC ( Policy Control and Charging, 策略控制 和计费), 来完成资源接纳控制功能。 PCC 位于业务控制层和接入 /承载层 之间, 针对移动接入网的特性实现一定的 QoS (服务质量)控制机制, 所 提供的功能主要有: 基于用户的定制信息实现策略控制、 基于业务数据流 的计费控制。 PCC 的主要功能实体是 PCRF ( Policy and Charging Rule Function, 策略与计费规则功能)。 PCRF 提供了面向 PCEF ( Policy and Charging Enforcement Function , 策略与计费执行功能) 的有关业务数据流 的检测、 门控、 QoS和按流计费的网络控制功能。
但是, 目前 3G用户无法在 NGN中进行接入认证和授权, 即无法成功 附着。 并且, 由于 RACF与 PCC之间缺少相应机制, 无法建立 S9*会话, 影响策略控制和管理。 发明内容
有鉴于此, 本发明的主要目的在于提供一种异构网络的控制方法和系 统, 以保证 3G用户能够在 NGN中成功附着。
为达到上述目的, 本发明的技术方案是这样实现的:
一种异构网络的控制方法, 该方法包括:
基于第三代合作伙伴计划 3GPP AAA服务器通过网络附着控制功能 NACF接收用户标识;
用户、 所述 NACF、 所述 3GPP AAA服务器根据所述用户标识, 进行 交互认证和 4受权;
所述认证和授权通过后, 所述 NACF为用户分配 IP地址。
其中, 该方法还包括:
所述 NACF为所述用户分配 IP地址后, 将用户接入清单推送给资源接 纳控制功能 RACF;
业务控制功能 SCF根据所述 IP地址和 /或所述用户标识向所述 NACF 查询用户 IP连接信息。
其中, 所述 NACF为用户分配 IP地址后, 还进行会话控制。
其中, 所述会话控制为会话建立时, 该方法还包括:
所述 RACF收到所述用户接入清单后对用户进行检查; 若决策出该用 户是初始附着并且是 3GPP 用户, 则所述 RACF 向策略与计费规则功能
PCRF发送会话建立消息, 以建立 RACF与 PCRF之间的会话。
其中, 建立 RACF与 PCRF之间的会话后, 该方法还包括:
所述用户触发 PE-FE向所述 RACF发送资源请求消息, 请求接纳控制 决策;
所述 RACF收到所述资源请求消息后进行授权检查, 并在授权检查通 过后将所述资源请求消息发送给 PCRF;
所述 PCRF基于用户签约清单、 业务信息进行策略决策, 制定初始的 策略规则并通知给所述 RACF;
所述 RACF根据授权检查结果和所述 PCRF的策略规则进行最后的策 略决策。
其中, 所述会话控制为会话释放时, 该方法还包括:
由所述 NACF、 策略执行功能实体 PE-FE、 所述 SCF、 所述 RACF或 所述 PCRF触发会话释放过程。
其中, 所述触发实体为 NACF时, 所述会话释放过程包括:
所述 NACF检测到用户离线,释放相应的 IP连接并向所述 RACF发送 通话消息, 指示用户的 IP连接释放; 所述 RACF收到用户离线的通知消息 后对该用户进行检查,并在决策出该用户是 3GPP用户时向所述 PCRF发送 会话释放消息, 以释放所述 RACF与所述 PCRF之间的会话; 所述 RACF 向所述 PE-FE发送资源释放消息 , 以释放所述 PE-FE上占用的资源; 所述触发实体为所述 PE-FE时, 所述会话释放过程包括:
当所述 PE-FE不再能提供被请求的资源时, 向所述 RACF发送资源释 放通知消息; 所述 RACF收到资源释放通知消息后对该用户进行检查, 并 以释放所述 RACF与所述 PCRF之间的会话;
所述触发实体为所述 SCF时, 所述会话释放过程包括:
当用户离开业务时, 所述 SCF向所述 RACF发送资源释放消息; 所述 RACF 收到资源释放消息后对该用户进行检查, 并在决策出该用户是所述 3GPP用户时向所述 PCRF发送会话释放消息, 以释放所述 RACF与所述 PCRF之间的会话; 所述 RACF向所述 PE-FE发送资源释放消息 , 以释放 所述 PE-FE上占用的资源;
所述触发实体为所述 RACF时, 所述会话释放过程包括:
所述 PCRF向所述 RACF下发事件消息; 当所述 RACF检测到满足所 述 PCRF下发的事件时,向所述 PCRF发送会话释放消息,以释放所述 RACF 与所述 PCRF之间的会话;所述 RACF还向所述 PE-FE发送资源释放消息, 以释放 PE-FE上占用的资源;
所述触发实体为所述 PCRF时, 所述会话释放过程包括:
所述 PCRF向所述 RACF订阅事件; 当所述 RACF检测到满足所述 PCRF所订阅的事件时, 向所述 PCRF发送事件上报消息; 所述 PCRF收到 所述 RACF的事件上报消息后向所述 RACF发送会话释放消息, 以释放所 述 RACF与所述 PCRF之间的会话; 所述 RACF向所述 PE-FE发送资源释 放消息, 以释放所述 PE-FE上占用的资源。
一种异构网络的控制系统, 该系统包括 3GPP AAA服务器、 NACF、 用 户; 其中, 所述 3GPP AAA服务器, 用于通过 NACF接收用户标识, 并根据所述 用户标识与所述 NACF、 用户进行交互认证和授权;
所述 NACF , 用于向所述 3GPP AAA服务器发送所述用户标识; 以及 在所述认证和授权通过后, 为用户分配 IP地址。
该系统还包括 SCF; 其中,
所述 NACF为所述用户分配 IP地址后, 还用于: 将用户接入清单推送 给 RACF;
所述 SCF, 用于 居所述 IP地址和 /或所述用户标识, 向所述 NACF 查询用户 IP连接信息。
其中, 所述 NACF还用于: 为用户分配 IP地址后, 进行会话控制。 本发明方法和系统, 均可保证 3G用户能够在 NGN中成功附着; 基于 此还可以进行后续的 RACF与 PCC间的会话建立、 策略提供、 会话释放等 处理, 因而不会影响策略控制和管理。 附图说明
图 1为现有技术的 NGN与 3G的交互示意图;
图 2为本发明一实施例的 3GPP终端在 NGN中的附着流程图; 图 3为本发明一实施例的 RACF与 PCC间的会话建立流程图; 图 4为本发明一实施例的策略提供流程图;
图 5为本发明一实施例的 NACF触发的会话释放流程图;
图 6为本发明一实施例的 PE-FE (策略执行功能实体)触发的会话释 放流程图;
图 7为本发明一实施例的 SCF触发的会话释放流程图;
图 8为本发明一实施例的由 RACF事件触发的会话释放流程图; 图 9为本发明另一实施例的由 RACF事件触发的会话释放流程图; 图 10为本发明一实施例的由 PCRF事件触发的会话释放流程图; 图 11为本发明另一实施例的由 PCRF事件触发的会话释放流程图; 图 12为本发明一实施例的异构网络的控制流程简图。 具体实施方式
总体而言, 进行用户附着时, NGN中的 NACF支持基于 3GPP认证和 授权机制, 并且 NACF与 3GPP AAA服务器存在交互, NGN中的 3GPP用 户标识传递得以进行。 如: 3G用户在 NGN附着过程中, 基于 3GPP认证 和授权机制进行认证和授权, IMSI (国际移动用户识别码)通过 NACF上 报给 3GPP AAA服务器。需要说明的是, 3GPP用户标识的表现形式有多种, 如 IMSI、 IMEI (国际移动设备身份码 )等。 下面仅以 IMSI为例进行描述。
NACF为 3G用户分配 IP地址,并将用户接入清单推送给 RACF;其中, 用户接入清单包括: IP地址、 和 /或 IMSI、 和 /或用户 QoS清单、 逻辑接入 标识、 和 /或物理接入标识、 和 /或接入网类型。
SCF根据 IP地址和 /或 IMSI向 NACF查询用户 IP连接信息; 其中,用 户 IP连接信息包括: 逻辑接入标识、 和 /或物理接入标识、 和 /或终端类型、 和 /或接入网络类型、 和 /或 RACF的 IP地址。
3G用户在 NGN中完成附着后, NACF向 RACF推送用户接入清单, RACF收到 NACF推送过来的用户接入清单后, 对该用户进行检查, 若决 策出该用户是初始附着并且是 3GPP用户,则 RACF向 PCRF发送会话建立 消息, 以建立 RACF与 PCRF之间的会话; 其中, 会话建立消息携带: IP 地址、 和 /或 IMSI、 和 /或接入网类型。 PCRF向 RACF回复 RACF与 PCRF 之间的会话建立确认消息。
用户通过传输层信令请求 QoS资源, 该行为触发 PE-FE生成资源请求 消息, 并向 RACF发送, 以请求接纳控制决策; 其中, 资源请求消息中携 带流描述和 /或 QoS参数。
RACF收到资源请求消息后,若本地没有该用户的业务信息,则向 SCF 获取该用户的业务信息。
RACF进行授权检查。 具体地, RACF检查流描述、 QoS资源及业务信 息是否与网络策略规则一致; 还包括 RACF进行资源可用性检查。
若上述授权检查通过, 由于该用户是 3GPP用户, 则 RACF进一步将 所述资源请求消息发送给 PCRF。
PCRF基于用户签约清单、 业务信息进行策略决策, 制定初始的策略规 则。
PCRF回复资源请求响应消息给 RACF, 该消息中包含 PCRF制定的初 始的策略规则。
RACF根据授权检查结果和 PCRF的策略规则进行最后的策略决策。
RACF向 PE-FE回复资源请求响应消息, PE-FE则安装 RACF制定的 最后的策略决策。
PE-FE通过传输层信令回复用户。
当需要进行会话释放时, 具体的操作过程会因不同的场景而包含不同 的操作方法, 如:
方法一:
当用户离线时, NACF向 RACF发送通话消息, 指示用户的 IP连接释 放, 该通知消息中携带: IP地址和 /或 IMSI。
RACF收到用户离线的通知消息后,对该用户进行检查,若决策出该用 户是 3GPP用户, 则 RACF向 PCRF发送会话释放消息, 以释放 RACF与 PCRF之间的会话; 其中, 会话释放消息携带: IP地址和 /或 IMSI。
RACF向 PE-FE发送资源释放消息 , 以释放 PE-FE上占用的资源。 方法二:
当 PE-FE不再能提供被请求的资源时, 向 RACF发送资源释放通知消 息; 其中, 释放通知消息中携带: IP地址和 /或 IMSI。 RACF收到资源释放通知消息后,对该用户进行检查,若决策出该用户 是 3GPP用户, 则向 PCRF发送会话释放通知消息 , 以释放 RACF与 PCRF 之间的会话; 其中, 会话释放通知中携带: IP地址和 /或 IMSI。
PCRF回复会话释放响应消息。
方法三:
SCF向 RACF发送资源释放消息, 该消息中携带 IP地址和 /或 IMSI。
RACF 收到资源释放消息后, 对该用户进行检查, 若决策出该用户是 3GPP用户, 则 RACF向 PCRF发送会话释放消息, 以释放 RACF与 PCRF 之间的会话; 其中, 会话释放消息携带: IP地址和 /或 IMSI。
RACF向 PE-FE发送资源释放消息 , 以释放 PE-FE上占用的资源。 方法四:
PCRF向 RACF下发事件,当 RACF检测到满足 PCRF下发的事件时向 PCRF发送会话释放消息, 以释放 RACF与 PCRF之间的会话; 其中, 会话 释放消息携带: IP地址、 和 /或 IMSI、 和 /或事件信息。 PCRF回复会话释放 响应消息。
RACF向 PE-FE发送资源释放消息 , 以释放 PE-FE上占用的资源。 方法五:
PCRF向 RACF订阅事件 ,当 RACF检测到满足 PCRF所订阅的事件时 向 PCRF发送事件上报消息; 其中, 上报消息中携带 IP地址、 和 /或 IMSI、 和 /或事件信息。
PCRF收到事件上报消息后,向 RACF发送会话释放消息,以释放 RACF 与 PCRF之间的会话; 其中, 释放消息中携带 IP地址和 /或 IMSI。
RACF向 PE-FE发送资源释放消息 , 以释放 PE-FE上占用的资源。 下面以图 2至图 11为例对上述操作思路进行详细描述。
参见图 2, 图 2为本发明一实施例的 3GPP终端在 NGN中的附着流程 图, 该流程包括以下步骤:
( 1 )认证和授权;
具体而言, 在网络附着过程的初始阶段, 3G用户基于 3GPP认证和授 权机制进行认证和授权 , IMSI通过 NACF上报给 3GPP AAA服务器。
该步骤还包括基于传输签约清单进行接入网络的授权; 其中, 传输签 约清单可以从 3GPP AAA服务器下载到 NACF。
当认证成功并且用户被授权使用接入网络资源后, 执行基于传输签约 清单的接入网络配置; 其中, 清单信息包括: 逻辑连接标识、 和 /或 IMSI、 和 /或传输资源签约信息(从 3GPP AAA下载的 QoS清单或是默认的配置清 单)、 和 /或边缘 PE-FE设备标识。
( 2 ) IP配置;
( 2.1 )用户动态 IP地址提供和 IP配置信息提供。 在该步骤中, NACF 为用户分配 IP地址信息,并建立分配的 IP地址与逻辑连接标识之间的映射。
( 2.2 ) NACF将映射信息与 IMSI和传输签约清单进行关联, 并将关联 信息推送给 RACF; 其中, 关联信息包括: IP地址、 和 /或 IMSI、 和 /或用 户 QoS清单、 逻辑接入标识、 和 /或物理接入标识、 和 /或接入网类型。
( 3 ) NACF对 CPN网关进行参数配置。
( 4 ) SCF根据 IP地址和 /或 IMSI向 NACF查询用户 IP连接信息; 其 中, 用户 IP连接信息包括: 逻辑接入标识、 和 /或物理接入标识、 和 /或终 端类型、 和 /或接入网络类型、 和 /或 RACF的 IP地址。
参见图 3 , 图 3为本发明一实施例的 RACF与 PCC间的会话建立流程 图, 该流程包括以下步骤:
步骤 301 : 3G用户在 NGN中完成附着。
步骤 302: NACF向 RACF推送用户接入清单; 其中, 用户接入清单包 括: IP地址、 和 /或 IMSI、 和 /或用户 QoS清单、 逻辑接入标识、 和 /或物理 接入标识、 和 /或接入网类型。
步骤 303: RACF收到 NACF推送过来的用户接入清单后,对该用户进 行检查。
步骤 304: 若 RACF决策出该用户是初始附着并且是 3GPP用户, 则 RACF向 PCRF发送会话建立消息, 以建立 RACF与 PCRF之间的会话; 其 中, 会话建立消息携带: IP地址、 和 /或 IMSI、 和 /或接入网类型。 PCRF回 复会话建立响应消息。
参见图 4, 图 4为本发明一实施例的策略提供流程图, 该流程包括以下 步骤:
步骤 401: 用户通过传输层信令请求 QoS资源。
步骤 402: 步骤 401中的请求触发 PE-FE生成资源请求消息。
步骤 403: PE-FE向 RACF发送资源请求消息 , 以请求接纳控制决策; 其中, 资源请求消息中携带流描述和 /或 QoS参数。
步骤 404: RACF收到资源请求消息后,若本地没有该用户的业务信息, 则向 SCF获取该用户的业务信息。
步骤 405: RACF进行授权检查。 具体地, RACF检查流描述、 QoS资 源及业务信息是否与网络策略规则一致; 还包括 RACF进行资源可用性检 查。
步骤 406: 若授权检查通过, 由于该用户是 3GPP用户, 则 RACF进一 步将所述资源请求消息发送给 PCRF; 其中, 该资源请求消息中携带: IP 地址、 和 /或 IMSI、 和 /或接入网类型、 和 /或流描述、 和 /或 QoS参数、 和 / 或业务信息。
步骤 407: PCRF基于用户签约清单、 业务信息进行策略决策, 制定初 始的策略规则。
步骤 408: PCRF回复资源请求响应消息给 RACF,该消息中包含 PCRF 制定的初始的策略规则。
步骤 409: RACF根据步骤 405的授权检查结果和步骤 408的策略规则 进行最后的策略决策。
步骤 410: RACF向 PE-FE回复资源请求响应消息, PE-FE安装 RACF 制定的最后的策略决策。
步骤 411 : PE-FE通过传输层信令回复用户。
参见图 5 , 图 5为本发明一实施例的 NACF触发的会话释放流程图, 该流程包括以下步骤:
步骤 501: NACF检测到用户离线, 释放相应的 IP连接。
步骤 502: 步骤 501触发 NACF向 RACF发送通话消息, 指示用户的
IP连接释放, 该通知消息中携带: IP地址和 /或 IMSI。
步骤 503: RACF收到用户离线的通知消息后, 对该用户进行检查。 步骤 504: 若 RACF决策出该用户是 3GPP用户, 则 RACF向 PCRF发 送会话释放消息, 以释放 RACF与 PCRF之间的会话; 其中, 会话释放消 息携带: IP地址和 /或 IMSI。
步骤 505: RACF向 PE-FE发送资源释放消息, 以释放 PE-FE上占用 的资源。
参见图 6, 图 6为本发明一实施例的 PE-FE触发的会话释放流程图, 该流程包括以下步骤:
步骤 601 : 当 PE-FE不再能提供被请求的资源时, 触发资源释放通知 消息。
步骤 602: PE-FE向 RACF发送资源释放通知消息; 其中, 释放通知消 息中携带: IP地址和 /或 IMSI。
步骤 603: RACF收到资源释放通知消息后, 对该用户进行检查。
步骤 604: 若 RACF决策出该用户是 3GPP用户, 则向 PCRF发送会话 释放通知消息, 以释放 RACF与 PCRF之间的会话; 其中, 会话释放通知 中携带: IP地址和 /或 IMSI。 PCRF回复会话释放响应消息。
参见图 7, 图 7为本发明一实施例的 SCF触发的会话释放流程图, 该 流程包括以下步骤:
步骤 701 : 当用户离开某业务时, 触发 SCF发送资源释放消息。
步骤 702: SCF向 RACF发送资源释放消息, 该消息中携带 IP地址和 / 或 IMSI。
步骤 703: RACF收到资源释放消息后, 对该用户进行检查。
步骤 704: 若 RACF决策出该用户是 3GPP用户, 则 RACF向 PCRF发 送会话释放消息, 以释放 RACF与 PCRF之间的会话; 其中, 会话释放消 息携带: IP地址和 /或 IMSI。
步骤 705: RACF向 PE-FE发送资源释放消息, 以释放 PE-FE上占用 的资源。
参见图 8,图 8为本发明一实施例的由 RACF事件触发的会话释放流程 图, 该流程包括以下步骤:
步骤 801 : PCRF向 RACF下发事件消息, 该事件消息携带: IP地址、 和 /或 IMSI、 和 /或事件信息; 事件信息如流量、 时间等。
步骤 802: RACF向 PCRF回复事件响应消息。
参见图 9,图 9为本发明另一实施例的由 RACF事件触发的会话释放流 程图, 该流程包括以下步骤:
步骤 901 : 当 RACF检测到满足 PCRF下发的事件时, 触发 RACF发 送释放消息。
步骤 902: RACF向 PCRF发送会话释放消息, 以释放 RACF与 PCRF 之间的会话; 其中, 会话释放消息携带: IP地址、 和 /或 IMSI、 和 /或事件 信息。 PCRF回复会话释放响应消息。 步骤 903: RACF向 PE-FE发送资源释放消息, 以释放 PE-FE上占用 的资源。
参见图 10,图 10为本发明一实施例的由 PCRF事件触发的会话释放流 程图, 该流程包括以下步骤:
步骤 1001: PCRF向 RACF订阅事件, 该订阅事件消息携带: IP地址、 和 /或 IMSI、 和 /或事件信息; 事件信息如流量、 时间等。
步骤 1002: 当 RACF检测到满足 PCRF所订阅的事件时, 向 PCRF发 送事件上报消息; 其中, 上报消息中携带 IP地址、 和 /或 IMSI、 和 /或事件 信息。
参见图 11 , 图 11为本发明另一实施例的由 PCRF事件触发的会话释放 流程图, 该流程包括以下步骤:
步骤 1001 : PCRF收到 RACF的事件上报消息后, 触发会话释放消息。 步骤 1002: PCRF向 RACF发送会话释放消息, 以释放 RACF与 PCRF 之间的会话; 其中, 释放消息中携带 IP地址和 /或 IMSI。
步骤 1003: RACF向 PE-FE发送资源释放消息 , 以释放 PE-FE上占用 的资源。
结合以上流程可知, 本发明异构网络的控制过程中, 最关键的附着过 程可以表示如图 12所示。 参见图 12, 图 12为本发明一实施例的异构网络 的控制流程简图, 该流程包括以下步骤:
步骤 1210: 基于 3GPP AAA服务器通过 NACF接收用户标识。
步骤 1220: 用户、 所述 NACF、 所述 3GPP AAA服务器根据所述用户 标识, 进行交互认证。
步骤 1230: 认证通过后, 所述 NACF为用户分配 IP地址。
在此之后,还可以进行前述的 RACF与 PCC间的会话建立、策略提供、 会话释放等处理。 综上所述, 无论是方法还是系统, 本发明异构网络的控制技术, 均可 保证 3G用户能够在 NGN中成功附着; 基于此还可以进行后续的 RACF与 PCC 间的会话建立、 策略提供、 会话释放等处理, 因而不会影响策略控制 和管理。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围, 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等, 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种异构网络的控制方法, 该方法包括:
基于第三代合作伙伴计划 3GPP AAA服务器通过网络附着控制功能 NACF接收用户标识;
用户、 所述 NACF、 所述 3GPP AAA服务器根据所述用户标识, 进行 交互认证和 4受权;
所述认证和授权通过后, 所述 NACF为用户分配 IP地址。
2、 根据权利要求 1所述的方法, 其中, 该方法还包括:
所述 NACF为所述用户分配 IP地址后, 将用户接入清单推送给资源接 纳控制功能 RACF;
业务控制功能 SCF根据所述 IP地址和 /或所述用户标识向所述 NACF 查询用户 IP连接信息。
3、 根据权利要求 1所述的方法, 其中, 所述 NACF为用户分配 IP地 址后, 还进行会话控制。
4、 根据权利要求 3所述的方法, 其中, 所述会话控制为会话建立时, 该方法还包括:
所述 RACF收到所述用户接入清单后对用户进行检查; 若决策出该用 户是初始附着并且是 3GPP 用户, 则所述 RACF 向策略与计费规则功能 PCRF发送会话建立消息, 以建立 RACF与 PCRF之间的会话。
5、 根据权利要求 4所述的方法, 其中, 建立 RACF与 PCRF之间的会 话后, 该方法还包括:
所述用户触发 PE-FE向所述 RACF发送资源请求消息, 请求接纳控制 决策;
所述 RACF收到所述资源请求消息后进行授权检查, 并在授权检查通 过后将所述资源请求消息发送给 PCRF; 所述 PCRF基于用户签约清单、 业务信息进行策略决策, 制定初始的 策略规则并通知给所述 RACF;
所述 RACF根据授权检查结果和所述 PCRF的策略规则进行最后的策 略决策。
6、 根据权利要求 1至 3任一项所述的方法, 其中, 所述会话控制为会 话释放时, 该方法还包括:
由所述 NACF、 策略执行功能实体 PE-FE、 所述 SCF、 所述 RACF或 所述 PCRF触发会话释放过程。
7、 根据权利要求 6所述的方法, 其中,
所述触发实体为 NACF时, 所述会话释放过程包括:
所述 NACF检测到用户离线,释放相应的 IP连接并向所述 RACF发送 通话消息, 指示用户的 IP连接释放; 所述 RACF收到用户离线的通知消息 后对该用户进行检查,并在决策出该用户是 3GPP用户时向所述 PCRF发送 会话释放消息, 以释放所述 RACF与所述 PCRF之间的会话; 所述 RACF 向所述 PE-FE发送资源释放消息, 以释放所述 PE-FE上占用的资源;
所述触发实体为所述 PE-FE时, 所述会话释放过程包括:
当所述 PE-FE不再能提供被请求的资源时, 向所述 RACF发送资源释 放通知消息; 所述 RACF收到资源释放通知消息后对该用户进行检查, 并 以释放所述 RACF与所述 PCRF之间的会话;
所述触发实体为所述 SCF时, 所述会话释放过程包括:
当用户离开业务时, 所述 SCF向所述 RACF发送资源释放消息; 所述 RACF 收到资源释放消息后对该用户进行检查, 并在决策出该用户是所述 3GPP用户时向所述 PCRF发送会话释放消息, 以释放所述 RACF与所述 PCRF之间的会话; 所述 RACF向所述 PE-FE发送资源释放消息, 以释放 所述 PE-FE上占用的资源;
所述触发实体为所述 RACF时, 所述会话释放过程包括:
所述 PCRF向所述 RACF下发事件消息; 当所述 RACF检测到满足所 述 PCRF下发的事件时,向所述 PCRF发送会话释放消息,以释放所述 RACF 与所述 PCRF之间的会话;所述 RACF还向所述 PE-FE发送资源释放消息, 以释放 PE-FE上占用的资源;
所述触发实体为所述 PCRF时, 所述会话释放过程包括:
所述 PCRF向所述 RACF订阅事件; 当所述 RACF检测到满足所述 PCRF所订阅的事件时, 向所述 PCRF发送事件上报消息; 所述 PCRF收到 所述 RACF的事件上报消息后向所述 RACF发送会话释放消息, 以释放所 述 RACF与所述 PCRF之间的会话; 所述 RACF向所述 PE-FE发送资源释 放消息, 以释放所述 PE-FE上占用的资源。
8、 一种异构网络的控制系统, 该系统包括 3GPP AAA服务器、 NACF、 用户; 其中,
所述 3GPP AAA服务器, 用于通过 NACF接收用户标识, 并根据所述 用户标识与所述 NACF、 用户进行交互认证和授权;
所述 NACF , 用于向所述 3GPP AAA服务器发送所述用户标识; 以及 在所述认证和授权通过后, 为用户分配 IP地址。
9、 根据权利要求 8所述的系统, 该系统还包括 SCF; 其中,
所述 NACF为所述用户分配 IP地址后, 还用于: 将用户接入清单推送 给 RACF;
所述 SCF, 用于 居所述 IP地址和 /或所述用户标识, 向所述 NACF 查询用户 IP连接信息。
10、 根据权利要求 8或 9所述的系统, 其中, 所述 NACF还用于: 为 用户分配 IP地址后, 进行会话控制。
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