WO2014079323A1

WO2014079323A1 - Method, device and system for realizing roaming local service function

Info

Publication number: WO2014079323A1
Application number: PCT/CN2013/086711
Authority: WO
Inventors: 吴锦花; 周晓云
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-11-22
Filing date: 2013-11-07
Publication date: 2014-05-30
Also published as: CN103841539A; CN103841539B

Abstract

Disclosed are a method, device and system for realizing a roaming local service function. The method comprises: when creating an S9 session, a visited policy and charging rules function (V-PCRF) sending an authorization request for a roaming local service function to a home policy and charging rules function (H-PCRF); and the H-PCRF receiving the request, and when the H-PCRF supports the roaming local service function and allows the subscription, the H-PCRF granting the roaming local service function to the V-PCRF. The present invention can realize the roaming local service function.

Description

Method, device and system for realizing roaming local business function

The present invention relates to the field of policy and charging control technologies for mobile communications, and in particular, to a method, device and system for implementing roaming local service functions. Background technique

Since the 3rd Generation Partnership Project (3GPP) Phase 7 (Release 7) standard system, policy and accounting functions have been implemented by the Policy and Charging Control (PCC) architecture. The PCC architecture is a functional framework that can be applied to multiple access technologies. For example, the PCC architecture can be applied to the Universal Mobile Telecommunications System (UMTS) terrestrial radio access network (UMTS Terrestrial Radio Access Network, UTRAN). ), the wireless access network of the Global System for Mobile Communication (GSM), the GSM Data Enhanced for GSM Evolution (RFID) wireless access network, the interworking wireless office i or the network (Interworking Wireless) Local Area Networks, I-WLAN) and Evolved Packet System (EPS).

FIG. 1 is a schematic diagram of a non-roaming composition structure of a PCC of the existing Rel-11. The following describes the logical function entities and their interface functions in the PCC architecture shown in FIG. 1:

Application Function (AF), which is used to provide access points for business applications. The network resources used by these business applications require dynamic policy control. When the parameter negotiation is performed on the service plane, the AF sends the related service information to the Policy and Charging Rules Function (PCRF). The policy control and charging rule function entity may also be called policy control and Billing rules function device. If the service information is consistent with the policy of the PCRF, the PCRF accepts the negotiation; otherwise, the PCRF rejects the negotiation, and The business parameters acceptable to the PCRF are given at the time of feedback. The AF can then return these parameters to the User Equipment (UE). The interface between the AF and the PCRF is an Rx interface.

The PCRF is the core of the PCC and is responsible for policy decision making and billing rules. The PCRF provides network control rules based on service data flows, including network traffic flow detection, Gating Control, Quality of Service (QoS) control, and data flow based charging rules. The PCRF sends its policy and charging rules to the Policy and Control Enforcement Function (PCEF). At the same time, the PCRF also needs to ensure that these rules are consistent with the user's subscription information. The basis for the PCRF to formulate policies and charging rules includes: business-related information obtained from AF, subscription information of users related to policy control and charging obtained from a User Profile Repository (SPR), and Information about the bearer-related network obtained from the PCEF through the Gx interface.

The PCEF is usually located in the Gateway (GW), such as the Packet Data Network Gateway (PDN-GW) of the EPS and the GPRS Gateway Support Node in the General Packet Radio Service (GPRS). The Gateway GPRS Support Node (GGSN) and the Packet Data Gateway (PDG) in the I-WLAN perform the policy and charging rules defined by the PCRF on the bearer plane. The PCEF detects the service data flow according to the service data flow filter in the rule sent by the PCRF, and then performs the policy and charging rule defined by the PCRF for the service data flow; when the bearer is established, the PCEF performs the rule according to the PCRF. Resource allocation, and performing gating control according to the information provided by the AF; at the same time, the PCEF triggers reporting the event occurring on the bearer network according to the event subscribed by the PCRF; according to the charging rule sent by the PCRF, the PCEF performs the corresponding service operation of the service data flow, Billing can be either online charging or offline charging. If it is online charging, PCEF needs to carry out credit management together with Online Charging System (OCS); when offline charging, PCEF and Offline Charging System (OFCS) Exchange related billing information. The interface between the PCEF and the PCRF is a Gx interface, the interface between the PCEF and the OCS is a Gy interface, and the interface between the PCEF and the OFCS is a Gz interface. PCEF can also be enhanced with Traffic Detection Function (TDF). The PCEF can include application detection control policies (Application Gating, Redirection, and Bandwidth Limit) according to the local configuration or the PCRF.

The TDF can be deployed independently. It can be connected to the PCRF through the Sd interface. The TDF can perform application detection and policy execution according to the application detection control rules delivered by the pre-configuration or PCRF. The PCRF provides application detection control rules or activates TDF pre-configuration rules for TDF. The policy control operations for independent TDF functions include gating, redirection, and bandwidth throttling. The TDF reports the related events and information of the detected service/flow to the PCRF (for example, reports the start and end of the detected service/flow to the PCRF), and sends a description of the service data flow to the PCRF, and transmits the flow detection from the PCRF. Signaling for service detection and policy rules.

The Bearer Binding and Event Reporting Function (BBERF) is usually located in the Access Network Gateway. For example, when the user equipment accesses the EPS through the E-UTRAN, and the Proxy Mobile Internet Protocol version 6 (PMIPv6) protocol is used between the serving gateway S-GW and the P-GW, the S-GW There is a BBERF. When a user equipment accesses through a trusted non-3GPP access network, a BBERF is also present in the trusted non-3GPP access gateway.

The SPR stores user policy charging control subscription information related to policy control and charging.

The interface between SPR and PCRF is the Sp interface.

OCS and PCEF jointly complete the control and management of user credit under online charging mode.

The OFCS and the PCEF jointly perform the charging operation in the offline charging mode.

The above PCC architecture implements an Internet Protocol connection access network (Internet) established by the UE for accessing a Packet Data Network (PDN) through various functional entities. Protocol Connectivity Access Network, IP-CAN) Session charging control for sessions.

In the prior art, when a user roams to a visited place, there are two ways of accessing the visited network (ie, the visited network), one is home routed access, and the other is local routing access. Local breakout access, for the local grooming access scenario, as shown in Figure 2 (PCC architecture in the LBO roaming scenario), where the PCEF is located in the visited network, and the information of the visited network and the home network (that is, the home network) interacts through the visited network. The roaming interface S9 interface between the PCRF (V-PCRF) and the home network PCRF (H-PCRF) is transmitted. When the user accesses the network access, the V-PCRF requests to establish an S9 session/sub-session through the S9 interface. The H-PCRF formulates a PCC policy, and sends a PCC rule to the V-PCRF, and the V-PCRF transmits the signal to the PCEF/BBERF. .

At present, the demand for personalized services for mobile communication is increasing, and the demand for user roaming is also increasing. Users hope to not only access the home network service on the visited network, but also the user terminal and the identity number (ID) information that is subscribed to the home network. access local traffic visited network, the visited network is also referred to as local traffic local service roaming (roaming local service, RLS) ₀

Since the roaming local service function belongs to the visited network and is independent of the home network, the V-PCRF decision is required for the user to access the related policies and resource authorization of the roaming local service. However, the policies and charging rules in the roaming scenario in the prior art are formulated and delivered by the H-PCRF. The V-PCRF can only accept or reject the authorization and rules of the HPCRF, and cannot perform independent roaming local services for users of the home network. Signing and authorization, so roaming local business functions are not possible. Summary of the invention

In view of this, the main purpose of the embodiments of the present invention is to provide a method, an apparatus, and a system for implementing a roaming local service function, which can implement a roaming local service function.

To achieve the above objective, the technical solution of the embodiment of the present invention is implemented as follows:

An embodiment of the present invention provides a method for implementing a roaming local service function, where the method includes: when a S9 session is created, a policy control and charging rule function entity (V-PCRF) of the visited network is visited. Sending a roaming local service function authorization request to the home network's policy control and charging rule function entity (H-PCRF);

The H-PCRF receives the request, and when the H-PCRF supports the roaming local service function and the subscription allows, the H-PCRF authorizes the roaming local service function to the V-PCRF.

Preferably, when the S9 session is created, the V-PCRF sends a roaming local service function authorization request to the H-PCRF,

The V-PCRF sends an S9 session establishment or modification request message to the H-PCRF, where the S9 session establishment or modification request message includes support feature information and/or a roaming local service function request field, where the support feature information is used to represent the V Whether the PCRF supports the roaming local service function, and the roaming local service function request field is used to indicate that the V-PCRF requests the H-PCRF to request the roaming local service function;

Correspondingly, the H-PCRF receives the request, and when the H-PCRF supports the roaming local service function and the subscription is allowed, the H-PCRF authorizes the roaming local service function to the V-PCRF,

The H-PCRF receives the request, and returns an S9 session establishment or modification response message to the V-PCRF. When the H-PCRF supports the roaming local service function and the subscription allows, the S9 session establishment or modification response message includes a roaming local service function. The indication field and/or the support feature information, the roaming local service function indication field indicating whether the H-PCRF authorizes the roaming local service function to the V-PCRF, and the support feature information is used to indicate whether the H-PCRF supports roaming Local business functions.

Preferably, before the H-PCRF authorizes the V-PCRF to roam the local service, the method further includes:

The H-PCRF acquires subscription information of the user.

Preferably, the H-PCRF obtains the subscription information of the user,

The H-PCRF acquires the subscription information of the user from the user subscription database H-SPR of the local or home network according to the user identification information in the S9 session establishment or modification request message. Preferably, after the H-PCRF authorizes the roaming local service to the V-PCRF, the method further includes: receiving a V-PCRF policy and charging control (PCC) rule for roaming local service information, and The PCC rules are sent to the Policy and Charging Enforcement Function Entity (PCEF).

An embodiment of the present invention provides a PCRF, where the PCRF includes:

The authorization request sending unit is configured to send a roaming local service function authorization request to the policy control and charging rule function entity (H-PCRF) of the home network when the S9 session is created;

The receiving unit is configured to receive the roaming local service function authorization sent by the H-PCRF.

Preferably, the authorization request sending unit is specifically configured to send an S9 session establishment or modification request message to the H-PCRF, where the S9 session establishment or modification request message includes support feature information and/or a roaming local service function request field. The support feature information is used to indicate whether the PCRF supports a roaming local service function, and the roaming local service function request field is used to indicate that the PCRF requests a roaming local service function authorization from an H-PCRF;

The receiving unit is configured to receive an S9 session establishment or modification response message sent by the H-PCRF, where the S9 session establishment or modification response message includes a roaming local service function indication field and/or support feature information, where the roaming local The service function indication field indicates whether the H-PCRF authorizes the roaming local service function to the PCRF, and the support feature information is used to indicate whether the H-PCRF supports the roaming local service function.

The embodiment of the present invention provides a PCRF, where the PCRF includes: a request receiving unit, configured to receive a roaming local service function authorization request sent by a policy control and charging rule function entity (V-PCRF) of the visited network;

The roaming local service function authorization unit is configured to authorize the roaming local service function to the V-PCRF when the PCRF supports the roaming local service function and the subscription is allowed.

Preferably, the request receiving unit is configured to receive an S9 session establishment or modification request message sent by the V-PCRF, where the S9 session establishment or modification request message includes support feature information and/or roaming local service function request. Field The roaming local service function authorization unit is configured to return an S9 session establishment or modification response message to the V-PCRF. When the PCRF supports the roaming local service function and the subscription is allowed, the S9 session establishment or modification response message includes roaming local service. a function indication field and/or support feature information, the roaming local service function indication field indicating whether the PCRF authorizes a roaming local service function to the V-PCRF, and the support feature information is used to indicate whether the PCRF supports a roaming local service function. .

An embodiment of the present invention provides a roaming local service function implementation system, where the system includes: a policy control and charging rule function entity (V-PCRF) of a visited network, and a policy control and charging rule function entity of a home network (H) -PCRF) , where

The V-PCRF is configured to send a roaming local service function authorization request to the H-PCRF when the S9 session is created;

The H-PCRF is configured to receive a roaming local service function authorization request sent by the V-PCRF, and when the H-PCRF supports the roaming local service function and the subscription is allowed, the V-PCRF is authorized to roam the local service function.

Preferably, the V-PCRF is specifically configured to send an S9 session establishment or modification request message to the H-PCRF, where the S9 session establishment or modification request message includes support feature information and/or a roaming local service function request field. The support feature information is used to indicate whether the V-PCRF supports the roaming local service function, and the roaming local service function request field is used to indicate that the V-PCRF requests the H-PCRF to request the roaming local service function.

The H-PCRF is configured to receive a roaming local service function authorization request sent by the V-PCRF, and return an S9 session establishment or modification response message to the V-PCRF. When the H-PCRF supports the roaming local service function and the subscription is allowed, The S9 session establishment or modification response message includes a roaming local service function indication field and/or support feature information, where the roaming local service function indication field indicates whether the H-PCRF authorizes a roaming local service function to the V-PCRF, The support feature information is used to indicate whether the H-PCRF supports the roaming local service function. It can be seen that the technical solution of the embodiment of the present invention includes: when the S9 session is created, the policy control and charging rule function entity (V-PCRF) of the visited network sends a roaming local service function authorization request to the home network for policy control and calculation. Fee rule functional entity (H-PCRF);

The H-PCRF receives the request, and when the H-PCRF supports the roaming local service function and the subscription is allowed, the H-PCRF authorizes the roaming local service function to the V-PCRF; thus, the embodiment of the present invention can implement the user to the home network. Independent signing and authorization of roaming local service functions, which in turn enables roaming local service functions. DRAWINGS

FIG. 1 is a flowchart of implementing a first embodiment of a method for implementing a roaming local service function according to the present invention;

2 is a schematic structural diagram of a PCRF according to an embodiment of the present invention;

3 is a schematic structural diagram of another PCRF according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a roaming local service function implementation system according to an embodiment of the present invention;

FIG. 5 is a flowchart of implementing a second embodiment of a method for implementing a roaming local service function according to the present invention;

FIG. 6 is a flowchart of implementing a third embodiment of a method for implementing roaming local service functions according to the present invention. A first embodiment of a method for implementing a roaming local service function is provided by the present invention. As shown in FIG. 1, the method includes:

Step 101: When the S9 session is created, the policy control and charging rule function entity (V-PCRF) of the visited network sends a roaming local service function authorization request to the policy control and charging rule function entity (H-PCRF) of the home network; Step 102: The H-PCRF receives the request. When the H-PCRF supports the roaming local service function and the subscription is allowed, the H-PCRF authorizes the roaming local service function to the V-PCRF.

Preferably, the step 101 may be,

Correspondingly, the step 102 may be,

The H-PCRF receives the request, and returns an S9 session setup response message to the V-PCRF. When the H-PCRF supports the roaming local service function and the subscription allows, the S9 session establishment or modification response message includes a roaming local service function indication field. And/or supporting the feature information, the roaming local service function indication field indicating whether the H-PCRF grants a roaming local service function to the V-PCRF, where the support feature information is used to indicate whether the H-PCRF supports roaming local service Features.

Preferably, before the H-PCRF authorizes the roaming local service function to the V-PCRF, the method further includes:

H-PCRF acquires subscription information of the user;

Preferably, the H-PCRF obtains the subscription information of the user,

The H-PCRF acquires the subscription information of the user from the local subscription database H-SPR of the local or home network according to the user identification information in the S9 session establishment or modification request message.

Preferably, after the H-PCRF authorizes the roaming local service function to the V-PCRF, the method further includes: the V-PCRF receiving the roaming local service function information formulates a PCC rule, and sends the PCC rule to the PCEF.

The embodiment of the present invention provides a PCRF. As shown in FIG. 2, the PCRF includes: an authorization request sending unit 201 configured to send a flood to the H-PCRF when the S9 session is created. Querying a local service function authorization request, where the roaming local service function authorization request includes information about whether the PCRF supports a roaming local service function;

The receiving unit 202 is configured to receive the roaming local service function authorization sent by the H-PCRF. Preferably, the authorization request sending unit 201 is specifically configured to send an S9 session establishment or modification request message to the H-PCRF, where the S9 session establishment or modification request message includes support feature information and/or a roaming local service function request field. The support feature information is used to indicate whether the PCRF supports a roaming local service function, and the roaming local service function request field is used to indicate that the PCRF requests a roaming local service function authorization from an H-PCRF;

The receiving unit 202 is configured to receive an S9 session establishment or modification response message sent by the H-PCRF, where the S9 session establishment or modification response message includes a roaming local service function indication field and/or support feature information, and the roaming The local service function indication field indicates whether the H-PCRF authorizes the roaming local service function to the PCRF, and the support feature information is used to indicate whether the H-PCRF supports the roaming local service function.

An embodiment of the present invention provides another PCRF. As shown in FIG. 3, the PCRF includes: a request receiving unit 301 configured to receive roaming from a policy control and charging rule function entity (V-PCRF) of a visited network. Local business function authorization request;

The roaming local service function authorization unit 302 is configured to authorize the roaming local service function to the V-PCRF when the PCRF supports the roaming local service function and the subscription is allowed.

Preferably, the request receiving unit 301 is specifically configured to receive an S9 session establishment or modification request message sent by the V-PCRF, where the S9 session establishment or modification request message includes support feature information and/or a roaming local service function request. Field

The roaming local service function authorization unit 302 is specifically configured to return an S9 session establishment or modification response message to the V-PCRF. When the PCRF supports the roaming local service function and the subscription is allowed, the S9 session establishment or modification response message includes roaming local. a service function indication field and/or support feature information, the roaming local service function indication field indicating whether the PCRF is The V-PCRF authorizes the roaming local service function, and the support feature information is used to indicate whether the PCRF supports the roaming local service function.

An embodiment of the present invention provides a system for implementing a roaming local service function. As shown in FIG. 4, the system includes: a V-PCRF 401 and an H-PCRF 402, where

The V-PCRF 401 is configured to send a roaming local service function authorization request to the H-PCRF 402 when the S9 session is created;

The H-PCRF 402 is configured to receive a roaming local service function authorization request sent by the V-PCRF 401, and when the H-PCRF 402 supports the roaming local service function and the subscription is allowed, the V-PCRF 401 is authorized to roam the local service function.

Preferably, the V-PCRF 401 is specifically configured to send an S9 session establishment or modification request message to the H-PCRF 402, where the S9 session establishment or modification request message includes support feature information and/or a roaming local service function request field, The support feature information is used to indicate whether the V-PCRF 401 supports the roaming local service function, and the roaming local service function request field is used to indicate that the V-PCRF 401 requests the H-PCRF 402 to request the roaming local service function.

The H-PCRF 402 is configured to receive a roaming local service function authorization request sent by the V-PCRF 401, and return an S9 session establishment or modification response message to the V-PCRF 401. When the H-PCRF 402 supports the roaming local service function and the subscription is allowed, The S9 session establishment or modification response message includes a roaming local service function indication field and/or support feature information, where the roaming local service function indication field indicates whether the H-PCRF 402 authorizes the roaming local service function to the V-PCRF 401, The support feature information is used to indicate whether the H-PCRF 402 supports the roaming local service function.

A second embodiment of a method for implementing a roaming local service function provided by the present invention is described below with reference to FIG.

In this embodiment, both the H-PCRF and the V-PCRF support the roaming local service function, the UE roams from the home location to the visited place, and when accessing the visited network, selects the roaming local service function, when the attribution After the network authorization visit network can independently decide the policy and formulate the rules for the roaming local service function, the home network no longer authorizes the policy and the established rules for the independent decision of the visited network.

Step 501: The PCEF that receives the IP-CAN session establishment request message sends an IP-CAN session establishment indication message to the V-PCRF, where the IP-CAN session establishment indication message carries the user identifier, the PDN identifier, the IP address of the UE, And an indication that the UE selects a roaming local service function.

Step 502: The V-PCRF determines, according to the received user identifier, whether the subscription information of the user exists locally. When the subscription information exists and the subscription information is valid, the process proceeds to step 503; when there is no subscription information, or exists When the subscription information is incomplete but the subscription information is incomplete, or the subscription information has expired, the process proceeds to step 504. Go to step 506.

Step 504: The V-PCRF sends a subscription information request message to the user subscription database V-SPR of the visited network, where the subscription information request message carries the user identifier and the PDN identifier.

Step 505: The V-SPR that receives the subscription information request returns a subscription information response message to the V-PCRF, where the subscription information response message carries the subscription information of the user.

Step 506: The V-PCRF determines, according to the user identifier, whether an S9 session has been established for the user. If the S9 session is not established for the user, the process proceeds to step 507. If the user has established an S9 session, the process proceeds to step 508.

Step 507: The V-PCRF sends an S9 session establishment request message to the H-PCRF, where the S9 session establishment request message carries a user identifier, a PDN identifier, an IP address of the UE, and a support feature field, and the support feature information It is used to indicate whether the V-PCRF supports the roaming local service function, and the process proceeds to step 509.

Step 508: The V-PCRF sends an S9 session modification request message to the H-PCRF, where the S9 session tampering request message carries a user identifier, a PDN identifier, an IP address of the UE, and support feature information, where the support feature information is used to indicate Whether the V-PCRF supports roaming local service functions. Step 509: The H-PCRF determines, according to the received user identifier, whether the subscription information of the user exists locally. When the subscription information exists and the subscription information is valid, the process proceeds to step 510; when there is no subscription information, or exists When the subscription information is incomplete, or the subscription information is present but the subscription information has expired, the process proceeds to step 511. Go to step 513.

Step 511: The H-PCRF sends a subscription information request message to the user subscription database H-SPR of the home network, where the subscription information request message carries the user identifier and the PDN identifier.

Step 512: The H-SPR that receives the subscription information request returns a subscription information response message to the H-PCRF, where the subscription information response message carries the subscription information of the user.

Step 513: The H-PCRF determines whether to go to the V according to the obtained subscription information of the user, the support feature information in the S9 session establishment or modification request message, and/or the roaming local service function indication, and whether the HPCRF supports the roaming local service function. - The PCRF authorizes the roaming local service function. Specifically, when the support feature information indicates that the V-PCRF supports the roaming local service function, the subscription information of the user indicates that the user subscribes to the roaming local service function, and the H-PCRF supports When roaming the local service function, determining to authorize the roaming local service function to the V-PCRF;

When the support feature information indicates that the V-PCRF does not support the roaming local service function, or the subscription information of the user indicates that the user does not subscribe to the roaming local service function, or the H-PCRF does not support the roaming local service function, the decision is rejected. Authorize the roaming local service function to the V-PCRF.

Step 514: The H-PCRF returns an S9 session establishment or modification response message to the V-PCRF, where the S9 session establishment or modification response message includes a roaming local service function indication field, where the roaming local service function indication field indicates the H-PCRF Whether to authorize the roaming local service function to the V-PCRF.

Here, the response message may further include an operator list (list) and a service list (list), a reason for rejecting the authorization (reject cause), and a related policy formulated by the H-PCRF; The PCC rules, event triggers, etc. are included.

Step 515: The V-PCRF stores the information returned by the H-PCRF, and returns an IP-CAN session establishment confirmation message to the PCEF, where the confirmation message carries a policy formulated by the V-PCRF or a policy sent by the H-PCRF.

Step 516: The AF sends the AF session establishment request information to the V-PCRF, where the request information carries the roaming local service information.

Step 517: The V-PCRF authorizes the roaming local service corresponding to the roaming local service information sent by the AF, and formulates a PCC rule for the roaming local service corresponding to the roaming local service information sent by the AF according to the obtained subscription information of the user. .

Step 518: The V-PCRF returns an AF session establishment response message to the AF.

Step 519: The V-PCRF sends the PCC rule to the PCEF.

Step 520: After the PCEF installs and executes the policy, returns a confirmation message to the V-PCRF.

A third embodiment of a method for implementing roaming local service functions provided by the present invention is described below with reference to FIG.

In this embodiment, both the H-PCRF and the V-PCRF support the roaming local service function, the UE roams from the home location to the visited place, and when accessing the visited network, selects the roaming local service function, and the home network authorized visited network can be used for roaming After the local business independent decision-making strategy and the rules are formulated, the home network also needs to authorize the policy and the established rules for the independent decision-making of the network.

Step 601: The PCEF that receives the IP-CAN session establishment request message sends an IP-CAN session establishment indication message to the V-PCRF, where the IP-CAN session establishment indication message carries the user identifier, the PDN identifier, the IP address of the UE, And an indication that the UE selects a roaming local service function.

Step 602: The V-PCRF determines, according to the received user identifier, whether the subscription information of the user exists locally. When the subscription information exists and the subscription information is valid, the process proceeds to step 603; when there is no subscription information, or exists When the subscription information is incomplete but the subscription information is incomplete, or the subscription information has expired, the process proceeds to step 604. Proceed to step 606.

Step 604: The V-PCRF sends a subscription information request message to the user subscription database V-SPR of the visited network, where the subscription information request message carries the user identifier and the PDN identifier.

Step 605: The V-SPR that receives the subscription information request returns a subscription information response message to the V-PCRF, where the subscription information response message carries the subscription information of the user.

Step 606: The V-PCRF determines, according to the user identifier, whether an S9 session has been established for the user. If the S9 session is not established for the user, the process proceeds to step 607. If the user has established an S9 session, the process proceeds to step 608.

Step 607: The V-PCRF sends an S9 session establishment request message to the H-PCRF, where the S9 sub-session establishment request message carries a user identifier, a PDN identifier, an IP address of the UE, a support feature field, and a roaming local service function. a request (RLS request) field, the support feature information is used to indicate whether the V-PCRF supports a roaming local service function, and the roaming local service function request field is used to indicate that the V-PCRF requests a roaming local service function from the H-PCRF. Authorization; proceed to step 609.

Step 608: The V-PCRF sends an S9 session modification request message to the H-PCRF, where the S9 session tampering request message carries the user identifier, the PDN identifier, the UE's IP address, the support feature information, and the roaming local service function request (RLS request). a field, the support feature information is used to indicate whether the V-PCRF supports a roaming local service function, and the roaming local service function request field is used to indicate that the V-PCRF requests a roaming local service function authorization from the H-PCRF.

Step 609: The H-PCRF determines, according to the received user identifier, whether the subscription information of the user exists locally. When the subscription information exists and the subscription information is valid, the process proceeds to step 610; when there is no subscription information, or exists When the subscription information is incomplete but the subscription information is incomplete, or the subscription information is invalid but the subscription information has expired, the process proceeds to step 611. Go to step 613.

Step 611: The H-PCRF sends a subscription information request message to the user subscription database H-SPR of the home network, where the subscription information request message carries the user identifier and the PDN identifier.

Step 612: The H-SPR that receives the subscription information request returns a subscription information response message to the H-PCRF, where the subscription information response message carries the subscription information of the user.

Step 613: The H-PCRF determines, according to the obtained subscription information of the user, the support feature information in the S9 session establishment or modification request message, and/or the roaming local service function indication, and whether the HPCRF supports the roaming local service function, whether to determine whether to the V- The PCRF authorizes the roaming local service function. Specifically, when the support feature information indicates that the V-PCRF supports the roaming local service function, and the subscription information of the user indicates that the user subscribes to the roaming local service function, and the H-PCRF supports roaming Determining the roaming local service function to the V-PCRF when the local service function is performed; when the support feature information indicates that the V-PCRF does not support the roaming local service function, or the subscription information of the user indicates that the user does not sign up to allow roaming local The service function, or the H-PCRF does not support the roaming local service function, determines that the roaming local service function is denied to the V-PCRF.

Step 614: The H-PCRF returns an S9 session establishment or modification response message to the V-PCRF, where the S9 session establishment or modification response message includes a roaming local service function indication field, where the roaming local service function indication field indicates the H-PCRF Whether to authorize the roaming local service function to the V-PCRF.

Here, the response message may further include an operator list (list) and a service list (list), a reject cause (reject cause), and a related policy formulated by the H-PCRF, and the like: the PCC rule is included in the policy, Event triggers, etc.

Step 615: The V-PCRF stores the information returned by the H-PCRF, and returns an IP-CAN session establishment confirmation message to the PCEF, where the confirmation message carries a policy formulated by the V-PCRF or a policy sent by the H-PCRF.

Step 616: The AF sends an AF session establishment request message to the V-PCRF, where the request information is It carries roaming local business information.

Step 617: The V-PCRF authorizes the roaming local service corresponding to the roaming local service information sent by the AF, and formulates a PCC rule for the roaming local service corresponding to the roaming local service information sent by the AF.

Step 618: The V-PCRF sends the roaming local service function information and the pre-authorization indication to the H-PCRF, where the pre-authorization indication indicates that the V-PCRF authorizes the roaming local service function corresponding to the roaming local service function information.

Step 619: The H-PCRF receiving the pre-authorization indication makes a decision. When the home network policy and the user subscription allow the user to access the roaming local service function authorized by the visited network, the H-PCRF confirms the authorization of the V-PCRF, and returns the confirmation message to the V-PCRF after saving the roaming local service function.

Step 620: The V-PCRF returns an AF session establishment response message to the AF, and formulates a PCC rule for the service according to the obtained authorization confirmation message of the HPCRF, and the subscription information of the user, and sends the PCC rule to the PCEF. If there is a BBERF, QoS is formulated and the QoS rule is sent to the BBERF.

Step 621: If required (for example, the service needs to be re-authorized in the HPCRF), the H-PCRF formulates the PCC rule according to the service information, the user subscription, the network policy, and the like, and provides the PCC rule to the V-PCRF; if the service only needs the HPCRF to confirm the authorization, then Execute and issue PCC rules directly by the VPCRF;

Step 622: The V-PCRF provides a PCC rule to the PCEF.

Step 623, after the PCEF installs and executes the policy, returns an acknowledgement message to the V-PCRF; Step 624, the V-PCRF returns an acknowledgement message to the H-PCRF.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

claims

1. A method for implementing roaming local service functions, the method includes:

When the S9 session is created, the policy control and charging rule function entity (V-PCRF) of the visited network sends a roaming local service function authorization request to the policy control and charging rule function entity (H-PCRF) of the home network;

H-PCRF receives the request, and when H-PCRF supports the roaming local service function and the subscription is allowed, H-PCRF authorizes the roaming local service function to V-PCRF.

2. The method according to claim 1, wherein when the S9 session is created, V-PCRF sends a roaming local service function authorization request to H-PCRF, which is,

The V-PCRF sends an S9 session establishment or modification request message to the H-PCRF. The S9 session establishment or modification request message includes support feature information and/or roaming local service function request fields. The support feature information is used to represent the V -Whether the PCRF supports the roaming local service function, the roaming local service function request field is used to indicate that the V-PCRF requests the roaming local service function authorization from the H-PCRF;

Correspondingly, H-PCRF receives the request, and when H-PCRF supports the roaming local service function and the subscription is allowed, H-PCRF authorizes the roaming local service function to V-PCRF, as,

The H-PCRF receives the request and returns an S9 session establishment or modification response message to the V-PCRF. When the H-PCRF supports the roaming local service function and the subscription is allowed, the S9 session establishment or modification response message includes the roaming local service function. Indication field and/or support feature information. The roaming local service function indication field indicates whether the H-PCRF authorizes the V-PCRF to authorize the roaming local service function. The support feature information is used to indicate whether the H-PCRF supports roaming. Local business functions.

3. The method according to claim 2, wherein before the H-PCRF authorizes the V-PCRF to authorize roaming local services, the method further includes: H-PCRF obtains the user's subscription information.

4. The method according to claim 3, wherein H-PCRF obtains the user's contract information as,

The H-PCRF obtains the user's subscription information from the user subscription database H-SPR of the local or home network based on the user identification information in the S9 session establishment or modification request message.

5. The method according to claim 1, wherein, after the H-PCRF authorizes the roaming local service to the V-PCRF, the method further includes: formulating policies and charging control for the V-PCRF that receives the roaming local service information. (PCC) rules, and send the PCC rules to the Policy and Charging Execution Function Entity (PCEF).

6. A policy control and charging rule function device (PCRF), the PCRF includes: an authorization request sending unit configured to send a request to the policy control and charging rule function entity (H-PCRF) of the home network when the S9 session is created )Send roaming local service function authorization request;

7. The PCRF according to claim 6, wherein the authorization request sending unit is configured to send an S9 session establishment or modification request message to the H-PCRF, and the S9 session establishment or modification request message includes support feature information and/or Or the roaming local service function request field, the support feature information is used to indicate whether the PCRF supports the roaming local service function, the roaming local service function request field is used to indicate that the PCRF requests roaming local service function authorization from the H-PCRF ;

The receiving unit is configured to receive an S9 session establishment or modification response message sent by the H-PCRF. The S9 session establishment or modification response message includes a roaming local service function indication field and/or support feature information. The roaming local service The function indication field indicates whether the H-PCRF authorizes the roaming local service function to the PCRF, and the support feature information is used to indicate whether the H-PCRF supports the roaming local service function.

8. A policy control and charging rule function device (PCRF), the PCRF includes: Please Request a receiving unit configured to receive the policy control and charging rule functional entity of the visited network

Roaming local service function authorization request sent from (V-PCRF);

9. The PCRF according to claim 8, wherein the request receiving unit is configured to receive an S9 session establishment or modification request message sent by the V-PCRF, and the S9 session establishment or modification request message includes support feature information. and/or roaming local business function request fields;

The roaming local service function authorization unit is configured to return an S9 session establishment or modification response message to the V-PCRF. When the PCRF supports the roaming local service function and the subscription is allowed, the S9 session establishment or modification response message includes the roaming local service function. Indication field and/or support feature information, the roaming local service function indication field indicates whether the PCRF authorizes the roaming local service function to the V-PCRF, and the support feature information is used to indicate whether the PCRF supports the roaming local service function.

10. A roaming local service function implementation system, the system includes: a policy control and charging rule function entity (V-PCRF) of the visited network and a policy control and charging rule function entity (H-PCRF) of the home network, in,

The H-PCRF is configured to receive the roaming local service function authorization request sent by the V-PCRF, and when the H-PCRF supports the roaming local service function and the contract is allowed, authorize the roaming local service function to the V-PCRF.

11. The system according to claim 10, wherein the V-PCRF is configured to send an S9 session establishment or modification request message to the H-PCRF, the S9 session establishment or modification request message including support feature information and/or Roaming local service function request field, the support feature information is used to indicate whether the V-PCRF supports the roaming local service function, the roaming local service function The capability request field is used to indicate that the V-PCRF requests the roaming local service function authorization from the H-PCRF; the H-PCRF is configured to receive the roaming local service function authorization request sent by the V-PCRF and return the S9 session establishment to the V-PCRF Or modify the response message. When the H-PCRF supports the roaming local service function and the subscription is allowed, the S9 session establishment or modification response message includes the roaming local service function indication field and/or support feature information. The roaming local service function indication field Indicates whether the H-PCRF authorizes the V-PCRF to authorize the roaming local service function, and the support feature information is used to indicate whether the H-PCRF supports the roaming local service function.