CN101662415B

CN101662415B - Policy control method, communication system and related equipment

Info

Publication number: CN101662415B
Application number: CN2008101355388A
Authority: CN
Inventors: 胡颖; 王珊珊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2008-08-29
Filing date: 2008-08-29
Publication date: 2012-11-07
Anticipated expiration: 2028-08-29
Also published as: CN101662415A

Abstract

The embodiment of the invention discloses a policy control method, a communication system and related equipment, which are used for performing policy control to reduce the consumption of a system resource and improve the flexibility of the policy control for a user. The method provided by the embodiment of the invention comprises the following steps: receiving a policy control session request by a policy decision-making entity, wherein the policy control session request comprises user identification or session identifier; generating a user policy control rule corresponding to the user identification or the session identifier; and sending the user policy control rule. The embodiment of the invention also provides a communication system and related equipment. The method, the system and the related equipment can effectively perform the policy control to reduce the consumption of the system resource and improve the flexibility of the policy control for the user.

Description

A kind of policy control method and communication system and relevant device

Technical field

The present invention relates to communication field, relate in particular to a kind of policy control method and communication system and relevant device.

Background technology

Along with development of internet technology, the latest network framework has obtained the increasing concern of user, and in the logical architecture of mobile communication network of future generation, user terminal inserts through local Radio Access Network.IAD is the convergent point of Access Network, is responsible for access technology relevant connection management and data forwarding.Data gateway is the gateway of visit packet data network, is responsible for the data connection management and the data forwarding of user capture packet data network, also is simultaneously the anchor point that the service of moving is provided for the mobile subscriber.Mobile communication network of future generation has strengthened policy control functions simultaneously, comprises service quality (QoS, the Quality of Service) control and the control of chargeing.

Policy decision entity is responsible for the service quality QoS of the data access connection of certain certain Packet Data Network of user capture and the control law of charging are done decision-making.And control law can offer gateway, and gateway inserts the data service that connects according to the rule of being obtained to data and carries out the service quality and the control of chargeing as Policy Enforcement Point.

The corresponding real network of above-mentioned logical architecture figure can be evolved packet system (EPS, an EvolvedPacket System) network; Accordingly, for global terrestrial radio access network (UTRAN, UniversalTerrestrial Radio Access); Or GSM EDGE Radio Access Network network (GERAN; GSM EDGERadio Access Network) or evolution UTRAN (E-UTRAN, Evolved UTRAN), IAD can be gateway (SGW; Serving Gateway) or GPRS (GPRS; General Packet Radio Service) supporting node (SGSN, Serving GPRS SupportNode), data gateway can be grouped data network gateway (PGW; Packet Data NetworkGateway) or Gateway GPRS Support Node (GGSN, Gateway GPRS Support Node).

Policing feature can be the strategy and the control (PCC that charges; Policy and Charging Control) function; Accordingly, policy decision entity can be strategy and charging rule decision functional entity (PCRF, PolicyCharging Rule Function) or policy deciding functional entity (PDF; Policy DecisionFunction); The Policy Enforcement Point of IAD can be bearing binding and event reporting function entity (BBERF, Bearer Binding and Event Reporting Function) or strategy enhancing point (PEP, Policy Enforcement Point); The Policy Enforcement Point of data gateway can be strategy and charging enhancement function entity (PCEF, Policy and Charging Enforcement Function) or PEP.

The inventor finds in realizing process of the present invention: the granularity of policy control of the prior art is the Internet protocol Access Network (IP-CAN that user terminal is initiated; Internet Protocol ConnectivityAccess Network) connects; Be that system is directed against each IP-CAN and connects and all carry out policy control (comprising the QoS control and the control of chargeing) respectively; And because same user may establish a plurality of IP-CAN connections simultaneously; Then different IP-the CAN to same user carries out policy control respectively in the prior art, causes having wasted system resource;

Secondly, available technology adopting connects the mode of carrying out policy control to IP-CAN, can not effectively carry out policy control to the user who has a plurality of IP-CAN connections, has reduced the flexibility of policy control.

Summary of the invention

The embodiment of the invention provides a kind of policy control method and communication system and relevant device, can carry out policy control to the user, reduces the consumption of system resource, and improves the flexibility of policy control.

The policy control method that the embodiment of the invention provides comprises: receive the policy control conversation request, comprise ID or session identification in the said policy control conversation request; Generate the subscriber policy control law corresponding with said ID or session identification; Send said subscriber policy control law.

The policy control method that the embodiment of the invention provides comprises: receive the subscriber policy control law that policy decision entity sends, said subscriber policy control law is used for indication the user is carried out policy control; When the user carries out transfer of data, inquire about the corresponding subscriber policy control law of said user; According to said subscriber policy control law described user is carried out policy control.

The communication system that the embodiment of the invention provides; Comprise: access network element; Be used to receive the connection that user terminal sends sets up IP-CAN in order to request and set up request; Send connection to data gateway and set up request; Ask or the request of policy control session updates to policy decision entity transmission policy control session foundation, set up in request or the request of policy control session updates in said policy control session and carry ID or session identification, the policy control session foundation that the reception policy decision entity feeds back is replied or the policy control session updates is replied; Set up from said policy control session and to reply or the policy control session updates is obtained the subscriber policy control law replying, corresponding user is carried out policy control according to this subscriber policy control law; Data gateway is used to receive the connection foundation request that access network element sends, and sends the session of IP-CAN policy control according to described request to policy decision entity and sets up request, and the IP-CAN policy control session of reception policy decision entity feedback is set up and replied; Policy decision entity; Be used to receive policy control session foundation request or the request of policy control session updates that said access network element sends; Set up or upgrade corresponding policy control session, generate the subscriber policy control law, send said subscriber policy control law to access network element.

The communication system that the embodiment of the invention provides comprises: access network element, and be used to receive the connection that user terminal sends sets up IP-CAN in order to request and set up request, send to data gateway and connect the request of foundation; Data gateway; Be used to receive the connection foundation request that access network element sends; Send the policy control session according to the said connection request of setting up to policy decision entity and set up request or the request of policy control session updates; In said policy control session foundation request or the request of policy control session updates, carry ID; The policy control session that receives the policy decision entity feedback is set up and is replied or the policy control session updates is replied, and sets up from said policy control session and replys or the policy control session updates is obtained the subscriber policy control law replying, and according to this subscriber policy control law corresponding user is carried out policy control; Policy decision entity; Be used to receive the policy control session foundation request that data gateway sends; Set up corresponding policy control session, or receive the policy control session updates request that data gateway sends, upgrade corresponding policy control session; ID or the session identification set up in request or the request of policy control session updates according to the policy control session generate the subscriber policy control law, send said subscriber policy control law to data gateway.

The policy decision entity that the embodiment of the invention provides comprises: ask receiving element, be used to receive the policy control conversation request of access network element or data gateway transmission, comprise ID or session identification in the said policy control conversation request; The strategy generation unit is used to generate the subscriber policy control law based on user corresponding with said ID or session identification; The strategy transmitting element is used for the subscriber policy control law that tactful generation unit generates is sent to access network element or data gateway.

The network element that is used for policy control that the embodiment of the invention provides comprises: connect and set up control unit, be used to receive the connection foundation request that user terminal sends, connect with user terminal; The policy control session management unit; Be used for setting up control unit and receive connection that user terminal sends and send the policy control session to policy decision entity after setting up request and set up request or the request of policy control session updates in connection, said policy control session set up ask or the request of policy control session updates in carry ID or session identification; The strategy acquiring unit is used to receive the subscriber policy control law based on the user that policy decision entity sends; The strategy execution unit, the subscriber policy control law that is used for getting access to according to tactful acquiring unit is controlled corresponding user's implementation strategy.

Can find out that from above technical scheme the embodiment of the invention has the following advantages:

In the embodiment of the invention; Policing parameter that the policy decision entity basis presets and the ID that receives generate the subscriber policy control law; And the subscriber policy control law that generates is sent to access network element or data gateway; The policy control of according to this subscriber policy control law the corresponding terminal user being carried out by access network element or data gateway, so the embodiment of the invention can carry out policy control to the user effectively, carry out policy control and needn't connect each IP-CAN of user; Thereby reduced the consumption of system resource, and can improve the flexibility of policy control.

Description of drawings

Fig. 1 is the policy control method first embodiment flow chart in the embodiment of the invention;

Fig. 2 is the policy control method second embodiment flow chart in the embodiment of the invention;

Fig. 3 is policy control method the 3rd an embodiment flow chart in the embodiment of the invention;

Fig. 4 is policy control method the 4th an embodiment flow chart in the embodiment of the invention;

Fig. 5 is policy control method the 5th an embodiment flow chart in the embodiment of the invention;

Fig. 6 is policy control method the 6th an embodiment flow chart in the embodiment of the invention;

Fig. 7 is a communication system embodiment sketch map in the embodiment of the invention;

Fig. 8 is a policy decision entity embodiment sketch map in the embodiment of the invention;

Fig. 9 is for being used for the network element embodiment sketch map of policy control in the embodiment of the invention.

Embodiment

The embodiment of the invention provides a kind of policy control method and communication system and relevant device, is used for carrying out policy control to the user, reduces the consumption of system resource, and improves the flexibility of policy control.

Policy control method embodiment in the embodiment of the invention comprises:

1) policy decision entity receives the policy control conversation request, comprises ID or session identification in the said policy control conversation request;

Access network element receives the request that user terminal sends; Send the policy control conversation request to policy decision entity afterwards; Perhaps access network element sends the policy control conversation request through data gateway to policy decision entity, includes the session label information of the user totem information that from the request that the user sends, gets access to or the corresponding policy control session of having set up in this policy control conversation request.

In the present embodiment, this policy control conversation request can be set up request for the policy control session, or the request of policy control session updates.

2) generate the subscriber policy control law corresponding with said ID or session identification;

Policy decision entity receives after the policy control conversation request of access network element or data gateway transmission, generates the subscriber policy control law based on the user according to user totem information in this policy control conversation request or session label information.

Concrete subscriber policy control law can confirm that for example for the multimedia service field, this subscriber policy control law can be the multimedia charging policy of variety classes etc. according to user's request or applied environment.

3) send said subscriber policy control law.

After the subscriber policy control law of generation based on the user; Policy decision entity is sent to access network element or data gateway with this subscriber policy control law, according to this subscriber policy control law corresponding user is carried out policy control by this access network element or data gateway.

See also Fig. 1, policy control method first embodiment comprises in the embodiment of the invention:

101, policy decision entity receives the policy control conversation request;

In the present embodiment; When user terminal requests inserts certain network or carries out a certain business; Can send the resource allocation request that connects the request of foundation or connected to access network element; This connection is set up in the request and is included the information such as ID of initiating this requesting users, comprises connection identifier information in the resource allocation request.

Access network element receives after this request; Send the policy control conversation request to policy decision entity; Perhaps access network element sends the policy control conversation request through data gateway to policy decision entity; The session label information that includes the user totem information that from request of connect setting up or resource allocation request, gets access to or the corresponding policy control session of having set up in this policy control conversation request; Can further include the current Access Network information of user (access network type for example, Access Network position, Access Network sign); Or terminal capability (QoS ability etc.), or the QoS of the IP-CAN connection of conversation type (the expression session is based on IP-CAN perhaps based on the user) and request or the like.

Access network element in the present embodiment can be IAD or access service node, and the policy control conversation request in the present embodiment specifically can be set up request for the policy control session, or the request of policy control session updates.

102, generate the subscriber policy control law according to the ID in policing parameter that presets and the request;

After (or access network element send) policy control conversation request that policy decision entity receives that access network element sends through data gateway; From this request, read ID; And the policing parameter of contracting according to this user of this ID inquiry, for example signatory QoS information, contracted user's maximum bandwidth; The user guarantees bandwidth, the signatory maximum bandwidth information such as (APN-AMBR) that connects.

Policy decision entity gets access to after ID and the policing parameter; Further comprise perhaps that according to these information the current Access Network information of user, terminal capability etc. generate the subscriber policy control laws, this control law is used for the user is carried out policy control, for example; Policy decision entity is according to the maximum bandwidth information of current all connections of having set up of user; With contracted user's maximum bandwidth information, generate actual user's maximum bandwidth information, be included in the policy control rule; Be used to detect the bandwidth that the active user takies and whether surpass its maximum bandwidth, etc.

103, send the subscriber policy control law to access network element or data gateway;

Policy decision entity generates after the subscriber policy control law, and this subscriber policy control law is sent to access network element or data gateway.

104, access network element or data gateway carry out policy control according to the subscriber policy control law to the user.

Access network element or data gateway receive after the subscriber policy control law of policy decision entity transmission; According to this rule corresponding user is carried out policy control; For example; The subscriber policy control law that policy decision entity sends comprises user's maximum bandwidth information, access network element or/and data gateway according to this user's data flow of maximum bandwidth limit information.

It is understandable that in practical application, access network element or data gateway can not done qualification here according to this subscriber policy control law to the policy control that the user carries out other types equally.

Need to prove that the policy decision entity in the present embodiment can be PCRF or PDF, access network element can be SGW or SGSN; Data gateway can be PGW or GGSN; It is understandable that, according to the difference of application network, policy decision entity; Access network element and data gateway can also be the entities of other types, do not do qualification here.

In the embodiment of the invention; Policing parameter that the policy decision entity basis presets and the ID that receives generate the subscriber policy control law; And the subscriber policy control law that generates is sent to access network element or data gateway; According to this subscriber policy control law the terminal use is carried out corresponding policy control by access network element or data gateway, so the embodiment of the invention can be effectively carry out policy control to the user, carry out policy control and needn't connect to each IP-CAN of user; Thereby reduced the consumption of system resource, and can improve the flexibility of policy control.

For ease of understanding, in the face of the policy control method in the embodiment of the invention is described in detail,, can the policy control method in the embodiment of the invention be divided three classes down according to the difference of the mode of connecting:

One, user terminal inserts IAD:

In the present embodiment, user terminal inserts IAD, and IAD is established to the tunnel of data gateway, between user terminal and the IAD, the data of all setting up the IP-CAN granularity between IAD and the data gateway are connected.

In the present embodiment,, can also further present embodiment be subdivided into following two kinds of situation according to the type of the gateway policy control session of setting up between IAD and the policy decision entity:

(1), set up gateway policy control session between IAD and the policy decision entity based on the user:

In the present embodiment; Set up gateway policy control session between IAD and the policy decision entity based on the user; The business information that Access Network information that policy decision entity provides according to IAD BBERF and data gateway PCEF provide generates the policy control rule based on the user, through the gateway policy control session based on the user; Send to IAD BBERF; Carry out respective rule by IAD BBERF,, further send rule and give base station or user terminal as carrying out policy control by rule.

See also Fig. 2, policy control method second embodiment comprises in the embodiment of the invention:

201, user terminal sends to connect to IAD and sets up request message;

In the present embodiment, user terminal sends to connect sets up request message to IAD BBERF, for example; Attach Request message attach request; Or layer three adheres to trigger messages L3attach trigger, or mobile IPv 4 (MIPv4) login request message, or PDN connects and sets up request message etc.; The connection of a visit packet data network PDN is set up in request, and promptly an IP-CAN connects.

The ID that includes this user in the request message is set up in the connection that user terminal sends, and perhaps can also be other user profile.

202, IAD sends the session of gateway policy control to policy decision entity and sets up request message or gateway policy control session updates request message;

In the present embodiment, IAD BBERF sends the session of gateway policy control and sets up request message to policy decision entity, and a policy control session based on the user is set up in request; Message is carried ID; Can also carry the current Access Network information of user (access network type, Access Network position, Access Network sign); Or terminal capability (QoS ability etc.), or conversation type (the expression session is based on IP-CAN perhaps based on the user) or the like.Wherein, ID can be network access Identifier (NAI, Network AccessIdentifier); Or IMSI International Mobile Subscriber Identity (IMSI; International Mobile SubscriberIdentity), or user's name, or telephone number; Or mobile radio station International ISDN number (MSISDN, Mobile Station International ISDN Number) number etc. can unique this user of expression sign.

Need to prove; If formerly having set up another IP-CAN, this user connected; Then possibly set up the policy control session based on the user, at this moment, IAD can send gateway policy control session updates request message; This session is upgraded in request, increases new IP-CAN link information.Can comprise ID in the update inquiry information, also can not comprise.When not comprising, policy decision entity can be associated with the policy control session of having set up according to session identification, obtains the session information that comprises ID.

203, policy decision entity sends the session of gateway policy control to IAD and sets up response message or gateway policy control session updates response message;

The gateway policy control session that policy decision entity sends according to IAD set up request message set up corresponding strategy control session or according to gateway policy control session updates request message to policy control session upgrade; Respond response message afterwards and give IAD, expression user's policy control session is set up or is upgraded and accomplish.

Need to prove; In the present embodiment, ID that policy decision entity also provides according to IAD simultaneously or session identification (perhaps also comprise Access Network information, or terminal capability; Or information such as conversation type) and the policing parameter that the presets (maximum bandwidth when signatory, confirmed of user terminal for example; Guarantee bandwidth or qos parameter etc.), generate subscriber policy control law based on the user, comprise the mode of carrying out policy control to the user in this subscriber policy control law.

For ease of understanding,, as shown in the table in the present embodiment with a concrete example shows subscriber policy control law, it is understandable that in practical application, the subscriber policy control law can also be other types equally:

Table 1

Generate after the subscriber policy control law; Policy decision entity can be carried at this rule and send to IAD in the response message; Perhaps can this subscriber policy control law be sent to IAD with separate message, concrete message format is not done qualification here yet.

In the present embodiment, the subscriber policy control law can comprise, this user's maximum bandwidth (MBR; Maximum Bit Rate), or this user converge maximum bandwidth (AMBR, Aggregate MaximumBit Rate); Or this user's assurance bandwidth information (GBR; Guaranteed Bit Rate), or this user's charging regulation, or this user's firewall information etc.

204, IAD sends to connect and sets up request message to data gateway, and request is set up this IP-CAN and connected;

205, data gateway sends the session of IP-CAN policy control to policy decision entity and sets up request message;

Data gateway sends the session of IP-CAN policy control and sets up request message to policy decision entity, the policy control session that is used to ask to set up IP-CAN.

IP address of terminal, the packet data network identification information that carries ID, IP-CAN in the request message set up in this IP-CAN policy control session, like packet data network identification (PDN ID) or APN (APN, Access Point Name) etc.

206, the response message of accomplishing is set up in the session of policy decision entity response IP-CAN policy control;

Policy decision entity can generate policy control rule based on IP-CAN and be carried at and be handed down to data gateway in the message.

207, data gateway response IAD connects the foundation completion;

208, IAD response user terminal connects the foundation completion;

209, policy decision entity sends the subscriber policy control law to IAD;

The information that policy decision entity can be provided in step 205 according to data gateway; Further confirm subscriber policy control law based on the user; If it is different to send to the subscriber policy control law of IAD in the subscriber policy control law after confirming and the step 203, then issue new subscriber policy control law (i.e. the second subscriber policy control law) to IAD BBERF.

For example; Policy decision entity is according to data gateway PCEF, CAMEL-Subscription-Information database (SPR; Subscription Profile Repository) or home subscriber server (HSS; Home SubscriberServer) the maximum bandwidth information of the newly-built IP-CAN that provides, adjustment user's maximum bandwidth information, then policy decision entity can in this step, send the user who upgrades maximum bandwidth information to IAD BBERF.

210, IAD BBERF response policy decision entity rule activation result.

IAD BBERF is according to the corresponding policy control rule of the requesting activation of policy decision entity; Customer traffic is carried out QoS and/or the control of chargeing; If desired; IAD possibly send further that policy control information is given the base station or/and the terminal is used for the base station or/and QoS control is carried out to data stream in the terminal.

Concrete control can for: receive the data message that the user sends or/and send to this user's data message when exceeding this maximum bandwidth parameter value when access network element, then access network element abandons and exceeds the partial data message.

Need to prove that step 209 and step 210 needs are carried out and got final product in the present embodiment after step 205.

After above-mentioned data connect the foundation completion; Because current carry out professional different of user terminal; Application server can send related service information in real time and give policy decision entity PCRF, and policy decision entity is according to business information, and the policy control rule that generates based on business sends to data gateway PCEF; Generation sends to IAD BBERF based on user's policy control rule.

In the present embodiment, have the BBERF function with IAD, data gateway has the PCEF function; Policy decision entity is that PCRF is that example describes; It is understandable that, when IAD/data gateway has the PEP function, when perhaps policy decision entity is PDF; Idiographic flow is identical with above-mentioned flow process, does not give unnecessary details here.

In the present embodiment; IAD BBERF is after request is set up in the connection that receives the user terminal transmission; Send the session of gateway policy control to policy decision entity PCRF and set up request message or gateway policy control session updates request message, set up in request message or the gateway policy control session updates request message in the session of gateway policy control and carry ID, perhaps also carry some other user related information; Policy decision entity PCRF (comprises user's maximum bandwidth according to presetting policing parameter; Or the user guarantees information such as bandwidth) generate the subscriber policy control law, this subscriber policy control law is sent to IAD, according to this subscriber policy control law corresponding user is carried out policy control by IAD; Therefore present embodiment can carry out policy control to the user effectively; Carry out policy control and needn't connect, thereby reduced the consumption of system resource, and can improve the flexibility of policy control each IP-CAN of user.

(2), set up gateway policy control session between IAD and the policy decision entity based on IP-CAN:

In the present embodiment, set up the gateway policy control session based on IP-CAN between IAD and the policy decision entity, IAD all uses identical policy decision entity for a plurality of IP-CAN connections that the user sets up.A plurality of IP-CAN information that policy decision entity inserts according to the user simultaneously; Generation is based on user's subscriber policy control law; Send to IAD BBERF; Carry out respective rule by IAD BBERF, for example carry out policy control, or further send rule and give base station or user terminal by rule.

See also Fig. 3, policy control method the 3rd embodiment comprises in the embodiment of the invention:

301, user terminal sends to connect to IAD and sets up request message;

In the present embodiment, user terminal sends to connect sets up request message to IAD BBERF, for example; Attach Request message attach request; Or layer three adheres to trigger messages L3attach trigger, or the MIPv4 login request message, or PDN connects and sets up request message etc.; The connection of a visit packet data network PDN is set up in request, and promptly an IP-CAN connects.

302, IAD sends the session of gateway policy control to policy decision entity and sets up request message;

In the present embodiment, IAD BBERF sends the session of gateway policy control and sets up request message to policy decision entity, and a policy control session based on IP-CAN is set up in request; Message is carried ID; Can also carry the current Access Network information of user (access network type, Access Network position, Access Network sign); Or terminal capability (QoS ability etc.), or conversation type (the expression session is based on IP-CAN perhaps based on the user) or the like.Wherein, ID can be NAI, or IMSI, or user's name, or telephone number, or various unique these users' of expression such as Mobile Subscriber International ISDN Number sign.

Need set up the situation of a plurality of IP-CAN simultaneously for the user; Each IP-CAN for same subscriber; Set up the gateway policy control session of corresponding each IP-CAN between IAD and the policy decision entity, simultaneously the identical policy decision entity PCRF of these gateway policy control sessions uses.Specifically can adopt following mode:

After IAD is set up the gateway policy control session of first IP-CAN for the user; Setting up in the request message of the gateway policy control session of follow-up IP-CAN; The address information of carrying purpose policy decision entity PCRF is (like domain name; IP address etc.), make each IP-CAN of same subscriber use identical policy decision entity PCRF to do the decision-making of policy control rule; Perhaps selecting route agent (DRA, Diameter Routing Agent) through PCRF is the identical PCRF of policy control session selection of each IP-CAN of same subscriber.Specifically can indicate DRA to select identical PCRF for same subscriber by BBERF/PCEF, perhaps through the DRA configuration, DRA be that identical PCRF is selected in the policy control session of each IP-CAN of same subscriber.

303, policy decision entity sends the session of gateway policy control to IAD and sets up response message;

The gateway policy control session request of setting up that policy decision entity sends according to IAD set up corresponding strategy control session or to policy control session upgrade; Respond response message afterwards and give IAD, the policy control session of expression IP-CAN is set up and is accomplished.

Need to prove; In the present embodiment, the ID that policy decision entity also provides according to IAD simultaneously (perhaps also comprise Access Network information, or terminal capability; Or information such as conversation type) and the policing parameter that the presets (maximum bandwidth when signatory, confirmed of user terminal for example; Guarantee bandwidth or qos parameter etc.), generate subscriber policy control law based on the user, comprise the mode of carrying out policy control to the user in this subscriber policy control law; The subscriber policy control law that generates in the present embodiment can be as shown in table 1, also can adjust according to actual conditions.

In the present embodiment, the subscriber policy control law can comprise, user's MBR, or AMBR, or user's GBR, or charging regulation, or firewall information etc.

In the present embodiment, policy decision entity generate based on user's subscriber policy control law can through and BBERF between the gateway policy control session of certain IP-CAN of having set up send to BBERF.This session can be any in the gateway policy control session of a plurality of IP-CAN of having set up; Also can be some (like the gateway policy control session of the corresponding IP-CAN of acquiescence APN) of appointment, this appointed information (like the corresponding acquiescence of which session of indication PCRF APN) can be provided by BBERF or PCEF.

304, IAD sends to connect and sets up request message to data gateway, and request is set up this IP-CAN and connected;

305, data gateway sends the session of IP-CAN policy control to policy decision entity and sets up request message;

IP address of terminal, the packet data network identification information that carries ID, IP-CAN in the request message set up in this IP-CAN policy control session, like PDN ID or APN etc.

306, the response message of accomplishing is set up in the session of policy decision entity response IP-CAN policy control;

307, data gateway response IAD connects the foundation completion;

308, IAD response user terminal connects the foundation completion;

309, policy decision entity sends the subscriber policy control law to IAD;

The information that policy decision entity can be provided in step 305 according to data gateway; Further confirm subscriber policy control law based on the user; If it is different to send to the subscriber policy control law of IAD in the subscriber policy control law after confirming and the step 303, then issue new subscriber policy control law (i.e. the second subscriber policy control law) to IAD BBERF.

For example; The maximum bandwidth information of the newly-built IP-CAN that policy decision entity provides according to data gateway PCEF, SPR or HSS; Adjustment user's maximum bandwidth information, then policy decision entity can in this step, send the user who upgrades maximum bandwidth information to IAD BBERF.

310, IAD BBERF response policy decision entity rule activation result.

Need to prove that step 309 and step 310 needs are carried out and got final product in the present embodiment after step 305.

In the present embodiment; IAD BBERF is after request is set up in the connection that receives the user terminal transmission; Send the session of gateway policy control to policy decision entity PCRF and set up request message or gateway policy control session updates request message, set up request message or gateway policy control session updates request message carries ID, perhaps also carry some other user related information in the session of gateway policy control; Policy decision entity PCRF (comprises user's maximum bandwidth according to presetting policing parameter; Or the user guarantees information such as bandwidth) generate the subscriber policy control law, this subscriber policy control law is sent to IAD, according to this subscriber policy control law corresponding user is carried out policy control by IAD; Therefore present embodiment can carry out policy control to the user effectively; Carry out policy control and needn't connect, thereby reduced the consumption of system resource, and can improve the flexibility of policy control each IP-CAN of user.

Two, set up between user terminal and the IAD local the connection:

Introduced the situation of user terminal access IAD in the foregoing description; What set up between user terminal and the IAD is that wireless access is connected; In the present embodiment, set up local the connection between user terminal and IAD, set up IP-CAN between user terminal and data gateway and be connected.But user terminal is connected the respective user terminal and is connected with a plurality of IP-CAN between the data gateway with this locality between the IAD.

In the present embodiment; Set up the gateway policy control session of user's granularity between IAD and the policy decision entity; The Business Stream information of the IP-CAN that the Access Network information that policy decision entity provides according to IAD BBERF, data gateway PCEF or application server AF provide or user contracting data etc.; Generation sends to IAD BBERF based on user's policy control rule, carries out respective rule by IAD BBERF; For example data stream is carried out policy control, perhaps send rule and give base station or user terminal by rule.

See also Fig. 4, policy control method the 4th embodiment comprises in the embodiment of the invention:

401, user terminal sends local the connection to IAD and sets up request message;

User terminal sends this locality connection and sets up request message to IAD, and request is set up local IP and connected, and for example distributes local ip address, sets up the terminal and arrives IPsec tunnel of IAD or the like.

402, IAD sends the session of gateway policy control to policy decision entity and sets up request message;

IAD BBERF sends the session of gateway policy control and sets up request message to policy decision entity; Set up the policy control session of user's granularity; Set up request message and carry user totem information, can also carry the current Access Network information of user (access network type, Access Network position; The Access Network sign), terminal capability (QoS ability etc.) or the like.Policy decision entity is set up this user's policy control session according to request message.Wherein, user totem information can be NAI, IMSI, user's name, telephone number, various unique these users' of expression such as ISDN sign.

Need to prove, if user terminal has only local a connection, then can be with based on the policy control session of locally-attached policy control session as user's granularity.IAD BBERF sends local link information to policy decision entity, like subscriber's local IP address, user totem information, Access Network information etc.

403, policy decision entity is set up response message to the session of IAD feedback gateway policy control;

Policy decision entity PCRF sets up the session of gateway policy control according to the request message of IAD, and the session of response IAD is set up and accomplished response message.Policy decision entity can generate the subscriber policy control law based on the user according to the current Access Network information of user terminal, user contracting data etc.; The generating mode of describing in concrete generating mode and the previous embodiment is similar; Repeat no more here; The subscriber policy control law that generates in the present embodiment can be as shown in table 1, also can adjust according to actual conditions.

Policy decision entity can be carried at the subscriber policy control law that generates and send to IAD in the response message, also can use separate message to send to IAD.Policy control rule based on the user can comprise, user's maximum bandwidth information (like UE-MBR, UE-AMBR etc.), user's assurance bandwidth information (UE-GBR), charging regulation, firewall information or the like.

404, the local connection of IAD response user terminal set up completion;

In the present embodiment, IAD connects to this locality that user terminal sends sets up the local ip address that can also carry in the response message to user's distribution, can also send to the terminal to the policing rule that needs user terminal to carry out.

405, user terminal sends to connect to data gateway and sets up request message;

User terminal sends to connect sets up request message to data gateway; The connection of certain packet data network PDN of visit is set up in request; Connection is set up request message and specifically can be the binding update messages Binding Update of two stack mobile IPv 6 protocol DSMIPv6 (or mobile IPv 6 protocol MIPv6); Or two stacks move the login request message Registration Request of DSMIPv4 (or mobile IPv 4 agreement MIPv4), and perhaps the security alliance SA of secure tunnel protocol IP sec is set up request message etc.

After data gateway is accepted the request of user terminal,, user terminal connects the IP address of using for distributing this.

406, data gateway sends the session of IP-CAN policy control to policy decision entity and sets up request message;

Data gateway sends the session of IP-CAN policy control as PCEF to policy decision entity PCRF and sets up request message; The information of IP-CAN is provided, comprises IP address of terminal, packet data network identification information (for example PDN ID/APN) of ID, IP-CAN etc.

407, the response message of accomplishing is set up in the session of policy decision entity response IP-CAN policy control;

408, data gateway response user terminal connects the foundation completion, carries the IP address allocated into UE, can also carry the policy control rule that user terminal need be carried out;

409, policy decision entity sends the subscriber policy control law to IAD;

The information that policy decision entity can be provided in step 406 according to data gateway; Further confirm subscriber policy control law based on the user; If it is different to send to the subscriber policy control law of IAD in the subscriber policy control law after confirming and the step 403, then issue new subscriber policy control law (i.e. the second subscriber policy control law) to IAD BBERF.

410, IAD BBERF response policy decision entity rule activation result.

Concrete control method is referring to embodiment two

Need to prove that step 409 and step 410 needs are carried out and got final product in the present embodiment after step 406.

Three, user terminal inserts the access service node:

Among aforementioned two embodiment; All be foundation and the renewal of carrying out the policy control session by IAD and policy decision entity; In the present embodiment, the access service node does not directly carry out the foundation and the renewal of policy control session with policy decision entity, and not in the access service node implementation strategy control; And carry out the foundation and the renewal of policy control session, and in data gateway, carry out policy control to the user by data gateway and policy decision entity.

In the present embodiment, user terminal inserts the access service node, and the access service node is established to the tunnel of data gateway, between user terminal and the access service node, the data of all setting up the IP-CAN granularity between access service node and the data gateway are connected.

In the present embodiment, set up the policy control session between data gateway PCEF and the policy decision entity, data gateway PCEF uses identical policy decision entity for a plurality of IP-CAN that the user sets up.A plurality of IP-CAN information that policy decision entity inserts according to the user simultaneously; Generation is based on user's policy control rule; Send to data gateway PCEF; Carry out respective rule by data gateway PCEF,, further send rule and give access service node, base station or user terminal as carrying out policy control by rule.

See also Fig. 5, policy control method the 5th embodiment comprises in the embodiment of the invention:

501, user terminal sends to connect to the access service node and sets up request message;

User terminal sends to connect sets up request message to access service node (for example BBERF), for example, and Attach Request message attach request; Layer three adheres to trigger messages L3attach trigger, like DHCP (DHCP, Dynamic Host Configuration Protocol) request message; Or packet data protocol (PDP; Packet Data Protocol) context activation message, or default bearing is set up message, or request message etc. is set up in the PDN connection; The connection of a visit packet data network PDN, i.e. an IP-CAN are set up in request.

502, the access service node sends to connect to data gateway and sets up request message;

The access service node sends to connect sets up request message (setting up message like PDP context activation message, GTP default bearing) to data gateway, and this IP-CAN is set up in request.

503, data gateway sends the policy control session to policy decision entity and sets up request message;

Data gateway sends the policy control session and sets up request message to policy decision entity, and the policy control session is set up in request.Message is carried IP address of terminal, packet data network identification information (like PDN ID/APN) of ID, IP-CAN etc.

504, policy decision entity is set up response message to data gateway feedback strategy control session;

The response message of accomplishing is set up in policy decision entity response policy control session.The policy control rule that policy decision entity can generate based on the user sends to data gateway through response message or other single messages.

Wherein, can set up between data gateway PCEF and the policy decision entity based on IP-CAN or/and based on user's policy control session.

The user need set up the situation of a plurality of IP-CAN simultaneously:

1) the policy control session that can set up corresponding each IP-CAN between each IP-CAN of same subscriber, data gateway PCEF and policy decision entity, identical policy decision entity PCRF is used in these IP-CAN policy control sessions simultaneously.Concrete mode can for:

PCEF is for after the user sets up first IP-CAN policy control session; The setting up of follow-up IP-CAN policy control session carried purpose policy decision entity PCRF in the request message address information is (like domain name; IP address etc.), make each IP-CAN of same subscriber use identical policy decision entity PCRF; Perhaps selecting route agent (like DRA) through PCRF is the identical PCRF of each IP-CAN policy control session selection of same subscriber.Specifically can indicate DRA to select identical PCRF for same subscriber by PCEF, perhaps through the DRA configuration, DRA be that identical PCRF is selected in each IP-CAN policy control session of same subscriber.

2) each IP-CAN of same subscriber; Can set up a policy control session between data gateway PCEF and the policy decision entity based on the user; Belong to the situation of different pieces of information gateway for each IP-CAN, can set up policy control session by a certain data designated gateway (like the data gateway at the corresponding IP-CAN place of acquiescence APN) based on the user.

Through above-mentioned method; After making that identical PCRF is used in each IP-CAN policy control session of same subscriber; This PCRF can be according to a plurality of IP-CAN information of this user; Generation sends to data gateway PCEF based on user's policy control rule, specifically can perhaps send to PCEF based on user's policy control session through the session of IP-CAN policy control.For example, the maximum bandwidth information (like APN-AMBR) of each IP-CAN that policy decision entity provides according to PCEF, SPR or HSS generates user's maximum bandwidth information (UE-AMBR), sends user's maximum bandwidth information and gives PCEF.PCEF comprises that to this regular execution PCEF oneself controls corresponding data flow according to rule, and/or sends to other network elements (comprising access service node, base station, terminal) and control.

The subscriber policy control law that generates in the present embodiment can be as shown in table 1, also can adjust according to actual conditions.

Concrete PCEF to the user carry out policy control mode can for:

The bandwidth that this user data message of transmitting as PCEF takies is greater than this maximum bandwidth parameter, and then PCEF abandons the data message that exceeds portions of bandwidth.

505, data gateway response access service node connects the foundation completion;

506, access service node response user terminal connects the foundation completion.

In the present embodiment, the access service node can be the node of chain of command and user plane unification, like SGSN, also can be the network element form that the chain of command user plane is separated, like mobile management entity (MME, MobilityManagement Entity) and SGW.

In the present embodiment; Data gateway is after request is set up in the connection that receives the transmission of access service node; Send the policy control session to policy decision entity and set up request, set up in the request in this policy control session and carry ID and user related information, policy decision entity receives this policy control session and sets up after the request; Generate the subscriber policy control law according to this ID and the policing parameter that presets; And this rule is sent to data gateway, then the PCEF on the data gateway can carry out policy control to corresponding user according to this rule, carry out policy control and needn't connect each IP-CAN of user; Thereby reduced the consumption of system resource, and can improve the flexibility of policy control.

The above-mentioned concrete mode of having introduced several kinds of policy control, introduce the policy control mode under a kind of roaming scence below:

In the present embodiment, visit ground IAD is set up the policy control session based on the user with visit ground policy decision entity, and visit ground policy decision entity and ground, local policy decision entity are set up the policy control session based on IP-CAN; Data gateway and ground, local policy decision entity are set up the policy control session based on IP-CAN.

Ground, local policy decision entity sends to data gateway and visit ground policy decision entity according to the policy control rule of the Business Stream information generation IP-CAN of IP-CAN; The policy control rule that the policy rule information of each IP-CAN that visit ground policy decision entity has been set up according to the user generates user's granularity sends to IAD.

See also Fig. 6, policy control method the 6th embodiment comprises in the embodiment of the invention:

601, user terminal sends to connect to IAD and sets up request message;

602, IAD sends the session of gateway policy control to visit ground policy decision entity and sets up request message;

IAD BBERF sends the session of gateway policy control and sets up request message policy decision entity (vPCRF) with giving visit, and a policy control session based on the user is set up in request, and message is carried user totem information; Can also carry the current Access Network information of user (access network type, Access Network position, Access Network sign); Terminal capability (QoS ability etc.); Conversation type (the expression session is based on IP-CAN perhaps based on the user), packet data network identification (like APN, PDN ID etc.).Visit ground policy decision entity is set up this user's policy control session according to request message.Wherein, user totem information can be NAI, IMSI, user's name, telephone number, various unique these users' of expression such as ISDN sign.

Need to prove; If formerly having set up another IP-CAN, this user connected; Then possibly set up the policy control session based on the user, at this moment, IAD can send gateway policy control session updates request message; This session is upgraded in request, increases new IP-CAN link information.

603, visit ground policy decision entity sends the session of gateway policy control to ground, local policy decision entity and sets up request message;

Visit ground policy decision entity sends the session of gateway policy control and sets up request message policy decision entity with giving the local, and a policy control session based on IP-CAN is set up in request.Message is carried IP-CAN information (like user totem information, packet data network identification, IP address), visit ground information (visit ground sign, the tactful preference in visit ground) or the like.

604, ground, local policy decision entity is set up response message to visit ground policy decision entity feedback gateway control session;

The policy decision entity response gateway policy control session of ground, local is set up response message and is given visit ground policy decision entity, and the expression session is set up and accomplished.Ground, message portability local policy decision entity is the policy control rule that IP-CAN generates according to the information of being obtained.

605, visit ground policy decision entity sends the session of gateway policy control to IAD and sets up response message or gateway policy control session updates response message;

The gateway policy control session that visit ground policy decision entity sends according to IAD set up request message set up corresponding strategy control session or according to gateway policy control session updates request message to policy control session upgrade; Respond response message afterwards and give IAD, expression user's policy control session is set up or is upgraded and accomplish.

Need to prove; In the present embodiment, the IP-CAN policy control rule that visit ground policy decision entity also obtains according to the policy decision entity from ground, local simultaneously, ID and policing parameter; Generation is based on user's subscriber policy control law; Comprise the mode of carrying out policy control to the user in this subscriber policy control law, the subscriber policy control law that generates in the present embodiment can be as shown in table 1, also can adjust according to actual conditions.

Generate after the subscriber policy control law; Visit ground policy decision entity can be carried at this rule and send to IAD in the response message; Perhaps can this subscriber policy control law be sent to IAD with separate message, concrete message format is not done qualification here yet.

606, IAD sends to connect and sets up request message to data gateway, and this IP-CAN is set up in request;

607, data gateway sends the session of IP-CAN policy control to ground, local policy decision entity and sets up request message;

Data gateway sends the session of IP-CAN policy control and sets up request message policy decision entity, the policy control session that IP-CAN is set up in request with giving the local.Message is carried IP address of terminal, packet data network identification information (like, PDN ID/APN) of ID, IP-CAN etc.

608, ground, local policy decision entity is set up response message to the session of data gateway feedback IP-CAN policy control;

The response message of accomplishing is set up in the session of ground, local policy decision entity response IP-CAN policy control.Ground policy decision entity in local can generate policy control rule based on IP-CAN and be carried at and be handed down to data gateway in the message.

609, data gateway response IAD connects the foundation completion;

610, IAD response user terminal connects the foundation completion;

611, ground, local policy decision entity sends IP-CAN policy control rule to visit ground policy decision entity;

The information that ground, local policy decision entity provides in step 607 according to data gateway is further confirmed the policy control rule of IP-CAN; If policing rule upgrades (rule that promptly is different from step 603 and generated) at 604 o'clock, then issue new policy control rule and give visit ground policy decision entity.

612, visit ground policy decision entity sends subscriber policy control law request message to IAD;

Visit ground policy decision entity is according to the policy control information of the IP-CAN that upgrades; Decision-making is based on user's policy control rule; If policy update (rule that issues when being different from step 605) then issues new subscriber policy control law (i.e. the second subscriber policy control law) and gives IAD BBERF.

For example; The maximum bandwidth information (like APN-AMBR) of the newly-built IP-CAN that ground policy decision entity in local provides according to data gateway; Be handed down to visit ground policy decision entity; Visit ground policy decision entity adjustment user's maximum bandwidth information (UE-AMBR) is sent the user's who upgrades maximum bandwidth information and is given IAD BBERF.

613, IAD is to visit ground policy decision entity feedback strategy control law response message;

IAD BBERF response visit ground policy decision entity rule activation result.IAD BBERF is according to the corresponding policy control rule of the requesting activation of policy decision entity; Customer traffic is carried out QoS and/or the control of chargeing; If desired; IAD possibly send further that policy control information is given the base station or/and the terminal is used for the base station or/and QoS control is carried out to data stream in the terminal.

614, ground, policy decision entity response local, visit ground policy decision entity rule activation result.

In the present embodiment; IAD BBERF is after request is set up in the connection that receives the user terminal transmission; Send the session of gateway policy control to visit ground policy decision entity PCRF and set up request message or gateway policy control session updates request message; Set up in request message or the gateway policy control session updates request message in the session of gateway policy control and to carry ID, perhaps also carry some other user related information, visit ground policy decision entity PCRF generates the subscriber policy control law according to the IP-CAN policy control rule that ground, local policy decision entity provides; This subscriber policy control law is sent to IAD; According to this subscriber policy control law corresponding user is carried out policy control by IAD, so present embodiment can be effectively carry out policy control to the user, carry out policy control and needn't connect to each IP-CAN of user; Thereby reduced the consumption of system resource, and can improve the flexibility of policy control;

Secondly, describe the policy control method under the roaming condition in the present embodiment, enlarged the range of application of present embodiment method, further improved technological flexibility.

Above-mentionedly introduced the policy control method in the embodiment of the invention, introduced the communication system embodiment in the embodiment of the invention below, seen also Fig. 7, the communication system embodiment in the embodiment of the invention comprises:

User terminal 701, access network element 702, data gateway 703 and policy decision entity 704;

Wherein, access network element 702 can be IAD, perhaps is the access service node, introduces respectively below:

When access network element 702 is IAD:

User terminal 701 is used for sending connection to access network element 702 and sets up request, sets up IP-CAN in order to request and connects;

Access network element 702 is used to receive the connection foundation request that user terminal 701 sends; Send connection to data gateway 703 and set up request; Send the session of gateway policy control to policy decision entity 704 and set up request message or gateway policy control session updates request message; Set up in request message or the gateway policy control session updates request message in the session of gateway policy control and to carry ID or session identification; Or further carry user related information (Access Network information for example; Or terminal capability, or information such as conversation type), response message or gateway policy control session updates response message are set up in the gateway policy control session that receives policy decision entity 704 feedbacks; Set up request message or the gateway policy control session updates request message from the session of gateway policy control and to obtain the subscriber policy control law, corresponding user is carried out policy control according to this subscriber policy control law;

Data gateway 703; Be used to receive the connection foundation request that access network element 702 sends; Send the session of IP-CAN policy control according to this request to policy decision entity 704 and set up request, the IP-CAN policy control session of reception policy decision entity 704 feedbacks is set up and is replied;

Policy decision entity 704; Be used to receive the gateway policy control session that access network element 702 sends and set up request message or gateway policy control session updates request message; Set up or upgrade the session of corresponding gateway policy control; The policing parameter generation subscriber policy control law that session is set up the ID in request message or the gateway policy control session updates request message and preset according to the gateway policy control is set up response message or gateway policy control session updates response message or other similar message with the subscriber policy control law that generates through the session of gateway policy control and is sent to access network element 702.

In the present embodiment, the performed policy control of access network element 702 specifically can for:

Access network element 702 is judged the data message that receives user's transmission and/or sends to this user's data message whether exceed the maximum bandwidth parameter value, if then access network element 702 abandons and exceeds the partial data message.

When access network element 702 is the access service node:

Access network element 702 is used to receive the connection foundation request that user terminal 701 sends, and sends to connect to set up to data gateway 703 and asks;

Data gateway 703; Be used to receive the connection foundation request that access network element 702 sends, set up to policy decision entity 704 transmission gateway policy control sessions according to this request and ask, in this request, carry ID; Or further carry user related information (Access Network information for example; Or terminal capability, or information such as conversation type), response message is set up in the gateway policy control session that receives policy decision entity 704 feedbacks; From this response message, obtain the subscriber policy control law, corresponding user is carried out policy control according to this subscriber policy control law;

Policy decision entity 704; Be used to receive the gateway policy control session foundation request that data gateway 703 sends; Set up or upgrade the session of corresponding gateway policy control; Generate the subscriber policy control law according to ID in the gateway policy control session request of setting up and the policing parameter that presets, the subscriber policy control law that generates is set up through the session of gateway policy control replied or other similar message are sent to data gateway 703.

In the present embodiment, the performed policy control of data gateway 703 specifically can for:

PCEF in the data network element 703 judges the data message that receives user's transmission and/or sends to this user's data message whether exceed the maximum bandwidth parameter value, if then the PCEF in the data network element 703 abandons and exceeds the partial data message.

For ease of understanding, with an instantiation above-mentioned communication system embodiment is elaborated below, it is understandable that in other scenes, above-mentioned communication system can be used equally, concrete mode is not given unnecessary details:

User terminal 701 sends to connect to IAD 702 sets up request message;

In the present embodiment, user terminal 701 sends to connect sets up request message to IAD 702, and the connection of a visit packet data network PDN is set up in request, and promptly an IP-CAN connects.

IAD 702 sends the session of gateway policy control to policy decision entity 704 and sets up request message or gateway policy control session updates request message;

In the present embodiment, IAD 702 sends the session of gateway policy control and sets up request message to policy decision entity, and a policy control session based on the user is set up in request, and message is carried ID.

Need to prove; If formerly having set up another IP-CAN, this user connected; Then possibly set up the policy control session based on the user, at this moment, IAD 702 can send gateway policy control session updates request message; This session is upgraded in request, increases new IP-CAN link information.

Request message is set up in the gateway policy control session that policy decision entity 704 sends according to IAD 702 or gateway policy control session updates request message is set up corresponding strategy control session or to policy control session upgrade; Respond response message afterwards and give IAD 702, expression user's policy control session is set up and is accomplished.

Need to prove; In the present embodiment, the ID that policy decision entity 704 also provides according to IAD 702 simultaneously (perhaps also comprise Access Network information, or terminal capability; Or information such as conversation type) and the policing parameter that the presets (maximum bandwidth when signatory, confirmed of user terminal for example; Guarantee bandwidth or qos parameter etc.), generate subscriber policy control law based on the user, comprise the mode of carrying out policy control to the user in this subscriber policy control law.

Generate after the subscriber policy control law; Policy decision entity 704 can be carried at this rule and send to IAD 702 in the response message; Perhaps can this subscriber policy control law be sent to IAD 702 with separate message, concrete message format is not done qualification here yet.

IAD 702 sends to connect sets up request message to data gateway 703, and request is set up this IP-CAN and connected;

Data gateway 703 sends the sessions of IP-CAN policy control to policy decision entity 704 and sets up request message, can also generate policy control rule based on IP-CAN and be carried at and be handed down to data gateway 703 in the message.

Data gateway 703 response IADs 702 connect to set up to be accomplished;

IAD 702 response user terminals 701 connect to set up to be accomplished;

The information that policy decision entity 704 can be provided according to data gateway 703; Further confirm subscriber policy control law based on the user; If the subscriber policy control law after confirming is different with the subscriber policy control law that sends to IAD 702 before, then issues new subscriber policy control law (i.e. the second subscriber policy control law) and give IAD 702.

IAD 702 carries out QoS and/or the control of chargeing according to the corresponding policy control rule of the requesting activation of policy decision entity 704 to customer traffic.

Concrete control can judge to receive the data message that the user sends and/or send to this user's data message whether exceed the maximum bandwidth parameter value for: access network element 702, if then access network element 702 abandons and exceeds the partial data message.

In the present embodiment, have the BBERF function with access network element 702, data gateway 703 has the PCEF function; Policy decision entity 704 is that PCRF is that example describes; It is understandable that, when access network element 702/ data gateway 703 has the PEP function, when perhaps policy decision entity 704 is PDF; Idiographic flow is identical with above-mentioned flow process, does not give unnecessary details here.

In the present embodiment; IAD 702 is after request is set up in the connection that receives user terminal 701 transmissions; Send the sessions of gateway policy control to policy decision entity 704 and set up request message or gateway policy control session updates request message, set up in request message or the gateway policy control session updates request message in the session of gateway policy control and carry ID, perhaps also carry some other user related information; Policy decision entity 704 (comprises user's maximum bandwidth according to presetting policing parameter; Or the user guarantees information such as bandwidth) generate the subscriber policy control law, this subscriber policy control law is sent to IAD 702, according to this subscriber policy control law corresponding user is carried out policy control by IAD 702; Therefore present embodiment can carry out policy control to the user effectively; Carry out policy control and needn't connect, can reduce the consumption of system resource, and can improve the flexibility of policy control each IP-CAN of user.

Introduce the policy decision entity embodiment in the embodiment of the invention below, see also Fig. 8, the policy decision entity embodiment in the embodiment of the invention comprises:

Request receiving element 801; Be used to receive the policy control conversation request of access network element or data gateway transmission; Comprise ID in this policy control conversation request, this policy control conversation request can be set up request or the request of policy control session updates for the policy control session;

Strategy generation unit 802; Be used for according to the ID of the policy control conversation request of asking receiving element 801 to receive and the policing parameter (maximum bandwidth that comprises the user that presets; Guarantee bandwidth, or qos parameter etc.) generate subscriber policy control law based on the user;

Strategy transmitting element 803; Be used for setting up response message or policy control session updates response message or other similar message the subscriber policy control law that tactful generation unit 802 generates is sent to access network element or data gateway, be used to indicate access network element or data gateway corresponding user to be carried out policy control according to this subscriber policy control law through the policy control session.

Policy decision entity in the present embodiment can further include:

IP-CAN asks receiving element 804, is used to receive the IP-CAN policy control session foundation request that data gateway sends;

Strategy generation unit 802 also is used for generating the second subscriber policy control law according to the said IP-CAN policy control session request of setting up;

Policy update unit 805 is used for sending the second subscriber policy control law to access network element.

Policy decision entity in the present embodiment can further include:

Roaming control unit 806; Be used for sending the policy control session and set up request to ground, local policy decision entity; The policy control session foundation that receives the policy decision entity transmission of ground, local is replied, and carries the IP-CAN policy control rule that ground, local policy decision entity generates in said the replying.

For ease of understanding, with an instantiation above-mentioned policy decision entity embodiment is elaborated below, it is understandable that in other scenes, above-mentioned policy decision entity can be used equally, concrete mode is not given unnecessary details:

Request receiving element 801 receives the gateway policy control session that IADs send and sets up request message or gateway policy control session updates request message, according to the gateway policy control session set up request message set up corresponding strategy control session or according to gateway policy control session updates request message to policy control session upgrade.

Strategy generation unit 802 (perhaps also comprises Access Network information according to the ID that provides in the request of asking receiving element 801 to receive; Or terminal capability; Or information such as conversation type) and the policing parameter that the presets (maximum bandwidth when signatory, confirmed of user terminal for example; Guarantee bandwidth or qos parameter etc.), generate subscriber policy control law based on the user, comprise the mode of carrying out policy control to the user in this subscriber policy control law.

Strategy generation unit 802 generates after the subscriber policy control law, and tactful transmitting element 803 can be carried at this rule and send to IAD in the response message, perhaps also can this subscriber policy control law be sent to IAD with separate message.

In addition; Policy decision entity can also receive the IP-CAN policy control session of data gateway transmission and set up request message; The response message of accomplishing is set up in the session of response IP-CAN policy control, can also generate policy control rule based on IP-CAN and be carried at and be handed down to data gateway in the message.

Need to prove that request receiving element 801 receives the IP-CAN policy control session of data gateway transmission and sets up request message notification strategy generation unit 802 afterwards;

Strategy generation unit 802 can be according to the information that data gateway provided; Further confirm subscriber policy control law based on the user; If the subscriber policy control law after confirming is different with the subscriber policy control law that sends to IAD before, then notification strategy transmitting element 803 issues new subscriber policy control law (i.e. the second subscriber policy control law) and gives IAD.

In the present embodiment; Request receiving element 801 receives the gateway policy control session of IAD transmission and sets up after request message or the gateway policy control session updates request message; Generate subscriber policy control law by tactful generation unit 802 according to ID in this request and the policing parameter that presets based on the user; Strategy transmitting element 803 is sent to IAD with the subscriber policy control law that tactful generation unit 802 generates; Make IAD to carry out policy control to corresponding user according to this subscriber policy control law; Carry out policy control and needn't connect, thereby reduced the consumption of system resource, and can improve the flexibility of policy control each IP-CAN of user.

Introduce the network element embodiment that is used for policy control in the embodiment of the invention below, see also Fig. 9, the network element embodiment that is used for policy control in the embodiment of the invention comprises:

Connect and set up control unit 901, be used to receive the connection foundation request that user terminal sends, connect with user terminal;

Unit 902 is set up in the policy control session; Being used for setting up control unit 901 in connection receives connection that user terminal sends and sets up request message or policy control session updates request message to the session of policy decision entity transmission policy control after setting up request; The session of gateway policy control is set up in request message or the gateway policy control session updates request message and is carried ID, perhaps can also carry some and user-dependent information;

Strategy acquiring unit 903; Be used for setting up unit 902 after request message or policy control session updates request message are set up in the session of policy decision entity transmission policy control when the policy control session; Response message or policy control session updates response message are set up in the policy control session that receives the policy decision entity feedback, set up request message or the gateway policy control session updates request message from the session of gateway policy control and read the subscriber policy control law;

Strategy execution unit 904, the subscriber policy control law that is used for getting access to according to tactful acquiring unit 903 is controlled corresponding user's implementation strategy, concrete policy control mode can for:

Access network element is judged the data message that receives user's transmission and/or sends to this user's data message whether exceed the maximum bandwidth parameter value, if then access network element abandons and exceeds the partial data message.

Network element in the present embodiment gathers in practical application can be IAD or data gateway, for ease of understanding, is that IAD is that example describes below with the network element, it is understandable that the handling process when this network element is data gateway is similar, repeats no more here:

Connect the connection of setting up control unit 901 reception user terminals transmissions and for example set up request message; Attach Request message attach request; Or layer three adheres to trigger messages L3attach trigger, or mobile IPv 4 (MIPv4) login request message, or PDN connects and sets up request message etc.; The connection of a visit packet data network PDN is set up in request, and promptly an IP-CAN connects.

The policy control session is set up unit 902 and is set up request message or gateway policy control session updates request message to the session of policy decision entity transmission gateway policy control;

In the present embodiment, the policy control session is set up unit 902 transmission gateway policy control sessions and is set up request message to policy decision entity, and a policy control session based on the user is set up in request, and message is carried ID.

Need to prove; If formerly having set up another IP-CAN, this user connected; Then possibly set up the policy control session based on the user, at this moment, unit 902 is set up in the policy control session can send gateway policy control session updates request message; This session is upgraded in request, increases new IP-CAN link information.

Strategy acquiring unit 903 receives the gateway policy control session of policy decision entity feedback and sets up response message or gateway policy control session updates response message, sets up request message or the gateway policy control session updates request message from the session of gateway policy control and reads the subscriber policy control law;

Strategy execution unit 904 is controlled corresponding user's implementation strategy according to the subscriber policy control law that tactful acquiring unit 903 gets access to.

In the present embodiment; Because tactful acquiring unit 903 can obtain the session of gateway policy control from policy decision entity and set up response message or gateway policy control session updates response message; And set up request message or the gateway policy control session updates request message from the session of gateway policy control and to read the subscriber policy control law; According to this subscriber policy control law corresponding user is carried out policy control by strategy execution unit 904; Carry out policy control and needn't connect, thereby reduced the consumption of system resource, and can improve the flexibility of policy control each IP-CAN of user.

One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; This program comprises the steps: when carrying out

Policy decision entity receives the policy control conversation request, comprises ID or session identification in the said policy control conversation request; Generate the subscriber policy control law corresponding with said ID or session identification; Send said subscriber policy control law.

The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.

More than a kind of policy control method provided by the present invention and communication system and relevant device have been carried out detailed introduction; For one of ordinary skill in the art; Thought according to the embodiment of the invention; The part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.

Claims

1. a policy control method is characterized in that, comprising:

Request is set up in the connection of setting up IP-CAN in order to request that access network element receives that user terminal sends; Send connection to data gateway and set up request; And, comprise ID or session identification in the said policy control conversation request to policy decision entity transmission policy control conversation request;

Policy decision entity receives the policy control conversation request, and generates the subscriber policy control law based on the user according to user totem information in this policy control conversation request or session label information;

Policy decision entity sends the policy control session that comprises said subscriber policy control law to access network element and replys;

Data gateway is set up request according to the said connection request of setting up to the session of policy decision entity transmission IP-CAN policy control, and the IP-CAN policy control session foundation that receives the policy decision entity feedback is replied;

Access network element carries out policy control according to this subscriber policy control law to corresponding user.

2. method according to claim 1 is characterized in that, said policy control conversation request is set up request for the policy control session;

Said method also comprises:

Policy decision entity is set up the policy control session based on user or internet protocol-based connection access network network IP-CAN according to the said policy control session request of setting up.

3. method according to claim 1 is characterized in that, said policy control conversation request is the request of policy control session updates;

Said method also comprises:

The policy control session that policy decision entity has been set up according to said policy control session updates.

4. method according to claim 1 is characterized in that, said policy decision entity sends the policy control session comprise said subscriber policy control law to access network element and also comprises after replying:

Policy decision entity receives the IP-CAN policy control session foundation request that data gateway sends;

Policy decision entity generates the second subscriber policy control law according to the said IP-CAN policy control session request of setting up.

5. method according to claim 4 is characterized in that, said method also comprises:

Policy decision entity sends the said second subscriber policy control law to access network element.

6. method according to claim 1 is characterized in that, said method also comprises:

Policy decision entity sends the policy control session to ground, local policy decision entity and sets up request;

Policy decision entity receives the policy control session foundation of ground, local policy decision entity transmission and replys, and carries the IP-CAN policy control rule that ground, local policy decision entity generates in said the replying.

7. a policy control method is characterized in that, comprising:

Request is set up in the connection of setting up IP-CAN in order to request that access network element receives that user terminal sends, and sends to data gateway to connect the request of foundation;

Data gateway receives connection foundation request or the resource allocation request that access network element sends; Send the policy control conversation request according to said connection foundation request or resource allocation request to policy decision entity, in said policy control conversation request, carry ID or session identification;

Policy decision entity sends the policy control session that comprises said subscriber policy control law to data gateway and replys;

Data gateway receives the subscriber policy control law that policy decision entity sends;

Data gateway carries out policy control according to this subscriber policy control law to corresponding user.

8. method according to claim 7 is characterized in that, said subscriber policy control law comprises: based on user's maximum bandwidth parameter value;

Said data gateway carries out policy control according to this subscriber policy control law to corresponding user and comprises:

PCEF in the data gateway judges the data message that receives user's transmission and/or sends to this user's data message whether exceed said maximum bandwidth parameter value based on the user, if then the PCEF in the data gateway abandons and exceeds the partial data message.

9. a communication system is characterized in that, comprising:

Access network element; Be used to receive the connection that user terminal sends sets up IP-CAN in order to request and set up request; Send connection to data gateway and set up request; Send the session of gateway policy control to policy decision entity and set up request or the request of gateway policy control session updates; In said gateway policy control session foundation request or the request of gateway policy control session updates, carry ID or session identification; The gateway policy control session that receives the policy decision entity feedback is set up and is replied or gateway policy control session updates is replied, and sets up from said gateway policy control session and replys or gateway policy control session updates is obtained the subscriber policy control law replying, and according to this subscriber policy control law corresponding user is carried out policy control;

Data gateway is used to receive the connection foundation request that access network element sends, and sends the session of IP-CAN policy control according to described request to policy decision entity and sets up request, and the IP-CAN policy control session of reception policy decision entity feedback is set up and replied;

Policy decision entity; Be used to receive gateway policy control session foundation request or the request of gateway policy control session updates that said access network element sends; Set up or upgrade the session of corresponding gateway policy control; Generate the subscriber policy control law, send said subscriber policy control law to access network element.

10. communication system according to claim 9 is characterized in that,

Request is set up in the IP-CAN policy control session that said policy decision entity also is used for sending according to said data gateway; Generate the second subscriber policy control law; Judge whether the said second subscriber policy control law is consistent with said subscriber policy control law; If inconsistent, then send the said second subscriber policy control law to said access network element.

11. a communication system is characterized in that, comprising:

Access network element is used to receive the connection that user terminal sends sets up IP-CAN in order to request and sets up request, sends to data gateway to connect the request of foundation;

Data gateway; Be used to receive the connection foundation request that access network element sends; Send the policy control session according to the said connection request of setting up to policy decision entity and set up request or the request of policy control session updates; In said policy control session foundation request or the request of policy control session updates, carry ID; The policy control session that receives the policy decision entity feedback is set up and is replied or the policy control session updates is replied, and sets up from said policy control session and replys or the policy control session updates is obtained the subscriber policy control law replying, and according to this subscriber policy control law corresponding user is carried out policy control;

Policy decision entity; Be used to receive the policy control session foundation request that data gateway sends; Set up corresponding policy control session, or receive the policy control session updates request that data gateway sends, upgrade corresponding policy control session; ID or the session identification set up in request or the request of policy control session updates according to the policy control session generate the subscriber policy control law, send said subscriber policy control law to data gateway.