WO2014173340A1

WO2014173340A1 - Inter-network subscription authorization charging policy method and device

Info

Publication number: WO2014173340A1
Application number: PCT/CN2014/077705
Authority: WO
Inventors: 吴锦花; 周晓云
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-08-02
Filing date: 2014-05-16
Publication date: 2014-10-30
Also published as: CN104349297A

Abstract

The present invention embodiment discloses an inter-network subscription authorization charging policy method and device, said method being applicable in a visited area policy control and charging rules function entity (V-PCRF), and comprising: said V-PCRF obtains attributable subscription information for a UE and, in accordance with said attributable subscription information, decides whether to authorize roaming local service for said UE. A policy control and charging rules function device, applicable in a visited network during UE roaming, and comprising: a receiving module, configured to obtain attributable subscription information for a UE; a decision-making module, configured to decide, in accordance with the attributable subscription information obtained by the receiving module, whether to authorize roaming local service for said UE. The solution of the present invention embodiment allows a visited network to execute local policy and carry out local service in regard to a roaming user, independent of attributable services and attributable policy decisions.

Description

Billing strategy method and device for internet contracting authorization

Technical field

The present invention relates to the field of mobile communications, and relates to a charging policy method and apparatus for inter-network subscription authorization.

Background technique

Since the development of the 3rd Generation Partnership Project Phase 7 (3GPP Release7) standard system, the policy and billing functions have been implemented by the Policy and Charging Control (PCC) framework. 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). , referred to as UTRAN), Global System for Mobile Communication (GSM) / GSM Data Enhanced Evolution (EDGE) radio access network, Interworking WLAN (I-WLAN) and evolved Evolved Packet System (EPS).

PCC mainly implements two functions of policy control and billing. As shown in Figure 1, the following logical functional entities are included in the PCC architecture:

AF (Application Function)

PCRF (Policy Control and Charging Rules Function),

PCEF (Policy and Control Enforcement Function)

TDF (Traffic Detection Function),

Bearer Binding and Event Reporting

Function , referred to as BBERF, SPR,

OCS (Online Charging System) and OFCS (Offline Charging System). The PCRF interacts with the SPR through the Sp interface, and The TDF interacts with the AF through the Rx interface, interacts with the BBERF through the Gxx interface, and interacts with the PCEF through the Gx interface. The PCE also interacts with the OCS through the Gy interface and interacts with the OFCS interface through the Gx interface.

The above PCC architecture implements an IP Connectivity Access Network (IP-CAN) session established by the UE to access a Packet Data Network (PDN) through one or more functional entities. Policy charging control.

In the related art, when a user roams to a visited place, there are two ways, one is home routed access and the other is local breakout access, as shown in FIG. 2 . In the PCC architecture of the LBO (Local BreakOut) roaming scenario, the PCEF is located in the visited network, and the information of the visited network and the home network is exchanged through the visited network PCRF (V-PCRF) and the home network PCRF (H-PCRF). The roaming interface S9 interface 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, issues a PCC rule to the V-PCRF, and forwards it to the PCEF/BBERF.

At present, the demand for personalized services for mobile communications is increasing, and the cost of home-based services is high when roaming is used. These two reasons lead to the need for users to roam to the visited network to support access to the home network service. The terminal and ID information of the home network subscription access the local service of the visited network (referred to as roaming local service). Because the roaming local service belongs to the visited network, the signing of the home network is independent, and the relevant policies and resource authorizations for the user to access the roaming local service function need to be determined by the V-PCRF of the visited network, that is: A roaming user, part of the service is a home network service, and the home network H-PCRF makes decisions and authorizations, and formulates relevant policy rules; part of the service is the local network service of the visited network, and the decision-making and authorization is made by the visited network V-PCRF. Issue relevant policy rules.

In the related art, the policies and charging rules in the roaming scenario are all formulated and delivered by the home network H-PCRF, and the policy decision and resource authorization are performed in the home network H-PCRF. All rules are determined by the home location, and the call is made. The network can only choose to receive or reject the authorization and rules of the H-PCRF, and cannot perform independent signing and authorization of the local service of the visited user for the roaming user, and cannot carry out the business of the visited place. Summary of the invention

The purpose of the embodiments of the present invention is to provide a charging policy method and device for inter-network subscription authorization, so as to solve the defect that the related visited network cannot perform independent policy decision and rule formulation for roaming local services.

In order to solve the above problem, the embodiment of the present invention provides an accounting policy for an inter-network subscription authorization, which is applied to a policy control and charging rule function entity (V-PCRF) in a visited place, and includes: the V-PCRF Obtaining the home location subscription information of the user equipment, and determining, according to the home location subscription information, whether the user equipment is authorized to roam the local service.

Preferably ,

The V-PCRF obtains the home registration information of the user equipment, including:

When the S9 session is created, the V-PCRF sends a request to the policy control and charging rule function entity (H-PCRF) of the home device of the user equipment to obtain the home place signing information of the user equipment;

Receiving attribution information of the user equipment returned by the H-PCRF.

Preferably,

The attribution information of the user equipment returned by the H-PCRF carries at least the indication information of whether the user equipment has subscribed to the roaming local service function;

Determining whether to authorize roaming local services for the user equipment according to the attribution information, including:

If it is determined that the value of the indication information indicates that the user equipment subscribes to the roaming local service, the roaming local service is authorized for the user equipment; otherwise, the user equipment is denied to use the roaming local service.

Preferably ,

Receiving the home subscription information of the user equipment returned by the H-PCRF, including: receiving an S9 session establishment or modification confirmation message returned by the H-PCRF, where the home location subscription information of the user equipment is carried .

Preferably, And receiving the home subscription information of the user equipment that is returned by the H-PCRF, including: receiving, by using an S9 interface, attribution information of the user equipment returned by the H-PCRF. Preferably,

Receiving, by the V-PCRF, the home location subscription information of the user equipment sent by the mobility management entity (MME);

The home subscription information of the user equipment sent by the MME is stored in a home subscriber server (HSS).

Preferably ,

The home subscription information of the user equipment received by the V-PCRF is obtained by the MME from the HSS through an S6a interface.

Preferably ,

Receiving the home subscription information of the user equipment sent by the MME by the V-PCRF, including:

The session creation request message sent by the visited network packet data gateway (PGW) received by the V-PCRF carries the home location subscription information of the user equipment;

The PGW obtains the home subscription information of the user equipment by receiving a create session request message sent by the MME through the SGW.

Preferably, the method further includes:

And after determining, according to the attribution information, that the user equipment is authorized to roam the local service, combining the home subscription information, the visitor subscription information, the access information of the user equipment, and the service request information of the application function, Conduct policy decisions and rule making.

Preferably ,

The subscription information of the user equipment returned by the H-PCRF in the home network is obtained locally or by the H-PCRF after receiving the request sent by the V-PCRF. The contract information request is obtained. Correspondingly, the embodiment of the present invention further provides a policy control and charging rule function device, which is applied to a visited network when a user equipment roams, and includes:

a receiving module, configured to acquire attribution information of the user equipment;

The decision module is configured to determine, according to the home registration information acquired by the receiving module, whether the user equipment is authorized to roam local service.

Preferably, the device further includes:

The sending module is configured to send a request to the policy control and charging rule function entity (H-PCRF) of the home location of the user equipment to acquire the home subscription information of the user equipment when the S9 session is created.

The receiving module is configured to obtain the home subscription information of the user equipment, and the method includes: the receiving module is configured to receive the home registration information of the user equipment returned by the H-PCRF.

Preferably ,

The attribution information of the user equipment returned by the H-PCRF that is received by the receiving module carries at least the indication information that the user equipment has subscribed to the roaming local service function; the decision module is set according to the The attribution of the subscription information determines whether the user equipment is authorized to roam the local service, including:

The determining module is configured to: if it is determined that the value of the indication information indicates that the user equipment subscribes to the roaming local service, the device has a precondition for authorizing the roaming local service for the user equipment; otherwise, rejecting the user equipment Use roaming local business.

Preferably ,

The receiving module is configured to receive the home registration information of the user equipment that is returned by the H-PCRF, and includes:

The receiving module is configured to receive an S9 session establishment or modification confirmation message returned by the H-PCRF, where the home location subscription information of the user equipment is carried.

Preferably ,

The receiving module is configured to receive a home location sign of the user equipment returned by the H-PCRF About information, including:

The receiving module is configured to receive, by using an S9 interface, attribution information of the user equipment returned by the H-PCRF.

Preferably ,

The receiving module is configured to acquire the attribution information of the user equipment, including:

The receiving module is configured to receive home subscription information of the user equipment sent by a mobility management entity (MME);

Preferably,

The home subscription information of the user equipment received by the receiving module is obtained by the MME from the HSS through an S6a interface.

Preferably ,

The receiving module is configured to receive the home subscription information of the user equipment sent by the MME, including:

The session creation request message sent by the visited network packet data gateway (PGW) received by the receiving module carries the home registration information of the user equipment;

Preferably, the device further includes:

a rule-making module, configured to: after the decision-making module determines, according to the attribution-of-home subscription information, that the user equipment is authorized to roam the local service, combining the attribution signing information, the visited place signing information, and the user equipment Enter the business request information of information and application functions, and make policy decisions and rule making.

Preferably,

The subscription information of the user equipment returned by the H-PCRF to the home network received by the receiving module is that the H-PCRF receives the request sent by the V-PCRF from the local The obtained information is obtained from the subscription information database of the home subscriber.

After the solution of the embodiment of the present invention is used, the visited network can perform local policies and conduct local services for the roaming users, independent of the home service and the attribution policy decision.

BRIEF abstract

FIG. 1 is a schematic diagram of a PCC non-roaming composition structure in related art;

2 is a schematic diagram of a PCC roaming visited access architecture in the related art;

3 is a flowchart of a charging policy method for inter-network subscription authorization in an embodiment of the present invention;

4 is a schematic flow chart of Embodiment 1 of the present invention;

FIG. 5 is a schematic flowchart of Embodiment 2 of the present invention.

Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other without conflict.

In this embodiment, an accounting policy for the inter-network subscription authorization is applied to the policy control and charging rule function entity (V-PCRF) of the visited place, as shown in FIG. 3, including:

The V-PCRF obtains the home location subscription information of the user equipment, and determines whether to authorize the roaming local service for the user equipment according to the home location subscription information.

For the embodiment, see the two embodiments below.

Embodiment 1:

When the user roams into the visited access scenario, the H-PCRF of the home network sends the subscription information stored in the SPR of the home to the V-PCRF of the visited network through the S9 interface, which facilitates the authorization and policy of the roaming local service. Decision making and rulemaking do not require attribution confirmation. After the V-PCRF of the visited network supports and authorizes the roaming local function according to the subscription information and function negotiation of the home location and the visited place, the visited network independently performs policy decision and rule formulation for the service. The process is shown in Figure 4, including: Step S401: In the process of the UE requesting to establish an IP-CAN session, the gateway where the PCEF of the visited network is located receives the IP-CAN session establishment request message, where the IP-CAN session establishment request message carries the user identifier and the request of the UE. PDN identifier of the incoming PDN network;

Step S402, the PCEF sends an IP-CAN session establishment indication message to the V-PCRF, and carries the user identifier, the PDN identifier, and an IP address (IP Address) allocated for the UE in the IP-CAN session establishment indication message;

When the UE accesses the visited network, the visited network provides the home roaming scheme and the roaming local service scheme, and the UE selects the roaming local service scheme; the PCEF transmits the roaming local service scheme indication of the UE in the IP-CAN session establishment indication message. Give V-PCRF;

Steps S402a-402b, if the V-PCRF has not yet interacted with the SPR of the visited place, then

The V-PCRF needs to interact with the SPR. If the subscription document of the roaming local service is stored in the SPR, the subscription document is obtained; or the V-PCRF interacts with the SPR after the device is started, so as to obtain the subscription document.

Step S403: The V-PCRF determines, according to the received user identifier, that the user is a roaming user. If the V-PCRF has not established an S9 session for the user, the V-PCRF sends a request message to the H-PCRF to establish an S9 session, and also requests to establish an S9 sub-session, and the V-PCRF carries the user in the S9 sub-session. User ID, PDN ID, IP address, etc. If the V-PCRF has established an S9 session for the user, the V-PCRF sends a request message to the H-PCRF to modify the S9 session, and also requests to establish an S9 sub-session, and the V-PCRF carries the S9 sub-session. The user ID, the PDN ID, and the IP address of the user; the support feature (feature support) carried in the request message sent by the V-PCRF is configured to support the roaming local service function, and the support function of the setting function is not limited in this example;

Step S404: The H-PCRF sends a subscription document request to the SPR according to the received user identifier, if it is determined that the subscription information of the user is not saved, and carries the user identifier and the PDN identifier of the user in the subscription document request. If it is determined that the subscription information of the user has been saved, step S406 is performed;

Step S405, the SPR returns the subscription information of the user according to the received user identifier and the PDN identifier (can be returned by the subscription document response, including the subscription information of the roaming local service); At this time, if the home SPR has not provided the subscription information of the UE to the H-PCRF, then the SPR will be provided to the H-PCRF; or, the H-PCRF interacts with the SPR after the device is started to obtain the subscription information of the UE. .

Step S406: The H-PCRF determines, according to the request message sent by the V-PCRF, the acquired subscription information of the user, the network policy, the access information of the UE, and the like, that the related service of the user is a roaming local service, and needs to send the attribution. Land signing information to the place of visit, authorization by the place of visit and formulation of the issuing strategy;

The H-PCRF sends the home subscription information (such as the subscription information of the roaming local service) to the V-PCRF through the S9 session establishment or modification confirmation message according to the obtained subscription information and the roaming agreement information of the user. The message may include a support feature indicating the function support, attribution signing information (for example, whether the user subscribes to the roaming local service indication information, and possible authorized operator list (list) and authorized service list and other details. ). If the H-PCRF does not support the roaming local service, the H-PCRF returns a corresponding support feature indication, indicating that the service request is rejected, and the S9 session/sub-session establishment fails.

Step S407: The V-PCRF stores the home registration information and the function support information returned by the H-PCRF. According to the attribution information and function support information, whether the decision is authorized to roam the local service. If the service is authorized, policy decision and rule formulation are performed in combination with the home location and the visited place signing information, the access information of the UE, the bearer information provided by the visited PCEF, and the service request information of the AF. The corresponding response message is returned to the PCEF, and the relevant PCC rule is sent to the PCEF. The corresponding QoS (Quality of Service) rules are sent to the BBERF for installation and execution.

Step S408, the PCEF installs and executes a PCC policy, such as a PCC rule, an event trigger, and the like. The gateway where the PCEF is located returns a response to the UE to establish an IP-CAN session, where the assigned IP address is carried;

Step S409: The UE establishes a connection with the server roaming the local service through the IP-CAN session established in steps S401-S408 and requests the service. The AS of the roaming local service provides roaming local service information to the AF, and triggers establishing an AF session with the PCRF;

Step S410: The AF sends an AF session establishment request to the V-PCRF, where the roaming local service information is carried. Step S411, the V-PCRF provides the roaming local service provided by the AF according to the roaming local service subscription document obtained from the visited SPR, the subscription document of the roaming local service of the home SPR sent by the H-PCRF, and the information provided by other clients. Authorize;

If the V-PCRF authorization is successful, the PCC rules are determined according to the service information, the user subscription information, the network policy, and the like, and are provided to the PCEF;

If the V-PCRF rejects the authorization, the V-PCRF returns a reject message to the AF, and the process ends; Step S412, the V-PCRF returns a session establishment response message to the AF;

Step S413, the V-PCRF provides a PCC rule to the PCEF;

Step S414: After the PCEF installs and executes the policy, the acknowledgment message is returned to the V-PCRF. Step S415 S416, optionally, if the operator policy needs to be aware of the policy decision and rules of the visited place, the V-PCRF is modified by the S9 session. The process transmits the relevant PCC rules to the home H-PCRF for sensing.

Embodiment 2:

FIG. 5 is a schematic diagram of a process of selecting an access local network PGW (Packet Gateway) to establish an IP-CAN session in the attaching process when the UE roams, as shown in FIG. 5, including:

Step 501: When the user is powered on, the attaching process is initiated to the visited network, that is, the UE sends an attach request message to the Mobility Management Entity (MME) through the base station;

In this step, the non-access stratum message (ie, the attach request message) is sent by the base station to the MME in the initial user message encapsulated in the S1 interface, and the base station also carries the capability of supporting the local access and the APN in the attach request. Sent to the MME;

Step 502: After the MME receives the attach request message, if the network information of the UE is not found in the network, or the attach request message does not perform integrity protection, or the integrity of the attach request message fails, the user terminal performs the Authentication and certification;

Steps 503-504: When the UE carries information requesting to establish a local connection in the attach request, or the protocol configuration option (PCO) and/or APN provided by the UE is encrypted, then The MME acquires PCO and/or APN information from the UE through the base station. The encrypted information acquisition request and the encrypted information acquisition response in FIG. 5;

Step 505: If the MME does not have the subscription information of the UE, send an update location request message to the HSS (Home Subscriber Server) to request to obtain the subscription information of the UE. The HSS returns the subscription information including the roaming local service identifier to the MME;

Step 506: The MME determines, according to the subscription information returned by the HSS and the local policy of the visited network, whether the PGW of the visited local network can be selected for the UE. The embodiment of the present invention does not limit the subscription form of the roaming local service in the HSS. For example: determining, by determining the value of the roaming local service identifier, a PGW that allows or prohibits selecting the visited network for the UE, and if so, may preferentially select the PGW of the visited network;

The MME can obtain the visited PGW information through the local configuration or the DNS server, and the user terminal implements the roaming visit access through the PGW.

If it is forbidden to select the PGW of the visited network for the UE, the related bearer completes the attaching process according to the related technology, and the process is a technology well known to those skilled in the art, and details are not described herein. The visited network does not provide the roaming local service for the UE;

Step 507: The MME selects an SGW according to the related technology, allocates a corresponding bearer ID, and sends a create session request message to the SGW, where: the user identifier, the PGW address, the PDN address, the APN, and the like of the UE are carried. The message carries the home subscription information (such as the roaming local service identifier) to the SGW and forwards to the PGW. After receiving the request message, the SGW sends the create session request message to the PGW corresponding to the PDN GW, and carries the relevant parameters (including the roaming local service subscription information of the home location) of the received message to the PGW;

Step 508: The PGW initiates an IP-CAN session creation process (508a~508f). The session creation request message is sent to the visited PCRF, where the message carries the user identifier of the UE, the PDN identifier, and the roaming local service subscription information of the home location. The V-PCRF receives the session creation request message, saves the relevant parameters, combines the relevant subscription information (VSPR and HSS) and the visited location policy, and performs the following operations: if the home location supports and signs the service, and the visited location supports and can be authorized Then, the V-PCRF formulates a PCC policy and a QoS policy according to the service request information of the AF, the session request information of the PGW, and the subscription information, corresponding to the PCEF and BBERF delivered to the visited network, and the possible ADC (Application Detection and Control, application). Detection control) rules to TDF. Processing flow 508a~508f, refer to S402~S407 for details. The repeated description is not repeated here. The main difference is that the H-PCRF optionally returns the subscription information to the V-PCRF. The MME based on the UE level has obtained and transmitted the HSS in the HSS. For the V-PCRF, optionally the relevant subscription information of the service or data flow level in the SPR may be returned to the V-PCRF through the H-PCRF;

Otherwise, the V-PCRF rejects the service authorization, rejects the PCEF session creation request, and the IP-CAN session creation of the service fails.

Step 509: The PGW installs and executes the PCC rule delivered by the PCRF; sends a session creation response message to the SGW, and forwards the message to the MME;

Step 510: The MME sends an initial context setup request to the base station, where the request includes an attach accept message sent to the UE.

Steps 511~512: The RRC connection is established between the base station and the UE. In this process, the base station sends an attach accept message sent by the MME to the UE through an RRC setup request;

Step 513: The base station receives an initial context establishment request, and returns an initial context establishment response to the SGW.

Step 514 515: The UE returns an attach complete message to the MME through the base station.

Step 516: The AF triggers the local service, and the V-PCRF policy determines and issues the rule to the PCEF installation. For details, see S409-416. The main difference is the V-PCRF policy decision basis, which is different from the roaming local service subscription document obtained by the V-PCRF from the visited SPR in S411 and the subscription document of the roaming local service of the home SPR sent by the H-PCRF; The V-PCRF decision is based on the subscription information of the roaming local service transmitted by the MME through the PCEF and the roaming local service subscription document in the visited SPR, and the roaming local service subscription document in the home SPR sent by the possible home H-PCRF. . If the V-PCRF authorization is successful, the PCC rules are formulated and provided to the PCEF according to the service information, the user subscription, the network policy, etc.; if the V-PCRF rejects the authorization, the V-PCRF returns a rejection message to the AF. The process ends;

Optionally, if the operator policy needs to be aware of the policy decisions and rules of the visited place,

The V-PCRF will modify the flow through the S9 session and transmit the relevant PCC rules to the home H-PCRF for sensing.

According to the requirements of the operator, the SPR (Subscription Profile Repository) signing and the second embodiment HSS signing can be deployed or deployed separately. The obtaining of the subscription information of the home location of the present invention in addition to the roaming local service authorized by the visited place can be applied to other visited localization and policy decision services, for example, supporting the separation of the third-party virtual operator. The service function, the busy time or busy area policy function of the visit decision, the sponsored data service function of the visited place, the function of the fair use principle, and the like can all be provided by the access plan of the attribution sign information of the embodiment of the present invention. Technical support for strategic decision making and empowerment.

Correspondingly, in this embodiment, a policy control and charging rule function device is applied to the visited network when the user equipment roams, including:

Preferably, the device further includes:

The receiving module is further configured to obtain the home location subscription information of the user equipment, including: the receiving module is configured to receive the home location subscription information of the user equipment returned by the H-PCRF.

Preferably,

The attribution information of the user equipment returned by the H-PCRF that is received by the receiving module carries at least the indication information that the user equipment has subscribed to the roaming local service function; the decision module is further configured to Determining whether the home subscription information decision is for the user equipment to authorize roaming local services, including:

The determining module is configured to: if it is determined that the value of the indication information indicates that the user equipment subscribes to the roaming local service, the device has a precondition for authorizing the roaming local service for the user equipment; otherwise, rejecting the user equipment Use roaming local business. Preferably,

The receiving module is further configured to receive the home subscription information of the user equipment returned by the H-PCRF, including:

Preferably,

The receiving module is further configured to acquire the home subscription information of the user equipment, where: the receiving module is configured to receive the home subscription information of the user equipment sent by the mobility management entity (MME);

Preferably,

The receiving module is further configured to receive the home registration information of the user equipment sent by the MME, including:

Preferably, the device further includes: a rule-making module, configured to: after the decision-making module determines, according to the attribution-of-home subscription information, that the user equipment is authorized to roam the local service, combining the attribution signing information, the visited place signing information, and the user equipment Enter the business request information of information and application functions, and make policy decisions and rule making.

Preferably,

The subscription information of the user equipment returned by the H-PCRF to the home network received by the receiving module is obtained locally by the H-PCRF after receiving the request sent by the V-PCRF. Or it is requested to obtain the information from the subscriber of the home location.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. Embodiments of the invention are not limited to any particular form of combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the embodiments of the present invention. There may be other various embodiments according to the embodiments of the present invention, and those skilled in the art can make one or the following according to the embodiments of the present invention without departing from the spirit and spirit of the embodiments of the present invention. It is intended that various modifications, equivalents, and improvements may be included within the scope of the embodiments of the present invention.

Industrial applicability

Claims

claims

1. A charging strategy method for inter-network contract authorization, which is characterized in that it is applied to the policy control and charging rule function entity (V-PCRF) of the visited place, including:

The V-PCRF obtains the home subscription information of the user equipment, and decides whether to authorize roaming local services for the user equipment based on the home subscription information.

2. The method of claim 1, wherein:

The V-PCRF obtains the home subscription information of the user equipment, including:

When the S9 session is created, the V-PCRF sends a request to the policy control and charging rules function entity (H-PCRF) of the home of the user equipment, requesting to obtain the home contract information of the user equipment;

Receive the home subscription information of the user equipment returned by the H-PCRF.

3. The method of claim 2, wherein:

The home subscription information of the user equipment returned by the H-PCRF at least carries indication information of whether the user equipment has subscribed to the roaming local service function;

Determining whether to authorize local roaming services for the user equipment based on the home subscription information includes:

If it is determined that the value of the indication information indicates that the user equipment has signed up for the roaming local service, then the roaming local service is authorized for the user equipment; otherwise, the user equipment is refused to use the roaming local service.

4. The method of claim 2 or 3, wherein:

The receiving the home subscription information of the user equipment returned by the H-PCRF includes: receiving the S9 session establishment or modification confirmation message returned by the H-PCRF, which carries the home subscription information of the user equipment. .

5. The method according to claim 2 or 3, wherein:

The receiving the home subscription information of the user equipment returned by the H-PCRF includes: receiving the home subscription information of the user equipment returned by the H-PCRF through the S9 interface.

6. The method of claim 1, wherein:

The V-PCRF receives the home subscription information of the user equipment sent by the mobility management entity (MME);

Wherein, the home subscription information of the user equipment sent by the MME is stored in the home subscriber server (HSS).

7. The method of claim 6, wherein:

The home subscription information of the user equipment received by the V-PCRF is obtained by the MME from the HSS through the S6a interface.

8. The method according to claim 6 or 7, wherein:

The V-PCRF receives the home subscription information of the user equipment sent by the MME, including:

The session creation request message sent by the Visited Network Packet Data Gateway (PGW) received by the V-PCRF carries the home subscription information of the user equipment;

The PGW obtains the home subscription information of the user equipment by receiving a session creation request message sent by the MME through the SGW.

9. The method of claim 5, further comprising:

After deciding to authorize roaming local services for the user equipment based on the home location subscription information, combining the home location subscription information, the visiting location subscription information, the access information of the user equipment and the service request information of the application function, Make strategic decisions and rule formulation.

10. The method according to claim 2 or 3, wherein:

The subscription information of the user equipment in the home network returned by the H-PCRF is obtained locally by the H-PCRF after receiving the request from the V-PCRF or sent to the user at the home place. Obtained from contract information database request.

11. A policy control and charging rule functional device, characterized in that it is applied to the visited network when the user equipment roams, including:

The receiving module is configured to obtain the home contract information of the user equipment; The decision-making module is configured to decide whether to authorize local roaming services for the user equipment based on the home subscription information obtained by the receiving module.

12. The policy control and charging rule functional device according to claim 11, further comprising: a sending module configured to, when the S9 session is created, send a message to the policy control and charging rule functional entity of the home location of the user equipment ( H-PCRF) sends a request to obtain the home subscription information of the user equipment

Wherein, the receiving module is configured to obtain the home subscription information of the user equipment, including: the receiving module is configured to receive the home subscription information of the user equipment returned by the H-PCRF.

13. The policy control and charging rule function device according to claim 12, wherein: the home subscription information of the user equipment returned by the H-PCRF received by the receiving module at least carries the user equipment Indicative information of whether the roaming local service function is subscribed; the decision-making module is configured to decide whether to authorize the roaming local service for the user equipment according to the home subscription information, including:

The decision-making module is configured such that if it is determined that the value of the indication information indicates that the user equipment has signed up for the roaming local service, then there is a prerequisite for authorizing the roaming local service for the user equipment; otherwise, reject the user equipment. Use roaming local service.

14. The policy control and charging rule function device according to claim 12 or 13, wherein: the receiving module is configured to receive the home contract information of the user equipment returned by the H-PCRF, including:

The receiving module is configured to receive the S9 session establishment or modification confirmation message returned by the H-PCRF, which carries the home subscription information of the user equipment.

15. The policy control and charging rule function device according to claim 12 or 13, wherein: the receiving module is configured to receive the home subscription information of the user equipment returned by the H-PCRF, including:

The receiving module is configured to receive the home subscription information of the user equipment returned by the H-PCRF through the S9 interface.

16. The policy control and charging rule function device according to claim 11, wherein: the receiving module is configured to obtain the home subscription information of the user equipment, including:

The receiving module is configured to receive the home subscription information of the user equipment sent by the mobility management entity (MME);

17. The policy control and charging rule functional device according to claim 16, wherein: the home subscription information of the user equipment received by the receiving module is obtained by the MME from the HSS through the S6a interface. of.

18. The policy control and charging rule function device according to claim 16 or 17, wherein: the receiving module is configured to receive the home subscription information of the user equipment sent by the MME, including:

The session creation request message sent by the visited network packet data gateway (PGW) received by the receiving module carries the home subscription information of the user equipment;

19. The policy control and charging rule function device according to claim 15, further comprising: a rule making module, configured to decide, in the decision-making module, to authorize roaming local services for the user equipment according to the home subscription information. Afterwards, policy decision-making and rule formulation are made by combining the home location subscription information, the visited location subscription information, the access information of the user equipment and the service request information of the application function.

20. The policy control and charging rule function device according to claim 12 or 13, wherein: the subscription information of the user equipment in the home network returned by the H-PCRF received by the receiving module is the H- -After receiving the request from the V-PCRF, the PCRF obtains it locally or requests it from the user subscription information database at home.