WO2016197306A1 - 一种业务链策略的制定方法及设备 - Google Patents

一种业务链策略的制定方法及设备 Download PDF

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Publication number
WO2016197306A1
WO2016197306A1 PCT/CN2015/080986 CN2015080986W WO2016197306A1 WO 2016197306 A1 WO2016197306 A1 WO 2016197306A1 CN 2015080986 W CN2015080986 W CN 2015080986W WO 2016197306 A1 WO2016197306 A1 WO 2016197306A1
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WO
WIPO (PCT)
Prior art keywords
service
service chain
function
message
chain
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PCT/CN2015/080986
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English (en)
French (fr)
Inventor
王硕
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/080986 priority Critical patent/WO2016197306A1/zh
Priority to CN201580069882.XA priority patent/CN107113799B/zh
Priority to EP15894576.6A priority patent/EP3288325B1/en
Priority to BR112017026304-1A priority patent/BR112017026304A2/zh
Publication of WO2016197306A1 publication Critical patent/WO2016197306A1/zh
Priority to US15/822,221 priority patent/US10637937B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1063—Application servers providing network services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1403—Architecture for metering, charging or billing
    • H04L12/1407—Policy-and-charging control [PCC] architecture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/61—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP based on the service used
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/66—Policy and charging system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and a device for formulating a service chain policy.
  • the 3rd generation partnership project (3GPP, 3rd generation partnership project) constructed the SAE system architecture in the system architecture evolution (SAE) project.
  • SAE system architecture evolution
  • At least one service function enabler unit can be deployed between the operator gateway and the external network to form a service chain.
  • Each value-added service service requirement corresponds to at least one service function enabling unit.
  • the video service flow needs to complete the service chain formed by the service function enabling unit corresponding to the two value-added service services, such as the cache service and the firewall, and complete the value-added service of the video service flow through the cache service and the firewall.
  • the service chain that a specific service flow needs to pass is determined by a service chain policy generated by a policy and charging rules function (PCRF) unit, and the policy is determined by the user related information, and It is already determined when the user attaches to the network and establishes a default bearer.
  • PCRF policy and charging rules function
  • the service enabling unit that the service flow of the specific service needs to pass may not be in the service chain policy determined when the user attaches to the network, or the service chain policy includes the specific Business enablement units that are not required for business flow. Obviously, such a business chain strategy is not accurate and flexible.
  • the embodiments of the present invention provide a method for developing a service chain policy, related devices and systems, and can flexibly and accurately formulate a service chain policy.
  • an embodiment of the present invention provides a method for formulating a service chain policy, where the method includes: a policy and charging rule function unit PCRF receives a first message sent by an application server AS via a service capability open function unit SCEF.
  • the first message is used to request a service for the user equipment UE Generating a service chain policy, the first message includes a service chain requirement of the service flow; and the PCRF formulates a service chain for the service flow according to a service chain requirement of the service flow included in the first message
  • the policy, the service chain policy includes a service chain function provided for the service flow.
  • the method before the PCRF receives the first message sent by the AS by using the SCEF, the method further includes: the PCRF receiving, by the SCEF, the AS sending The second message is used to query the service flow request for the service chain function in the network; the PCRF determines, according to the second message, the first service that the PCRF can provide to the AS a chain function list; the PCRF sends a third message to the AS via the SCEF, the third message includes the first service chain function list, and the service chain requirement is determined according to the first service chain function list.
  • the first message includes a user identifier of the UE, an application identifier of the service flow, an access point name, and the At least one of the media types of the service flow; when the first message includes the user identity of the UE, the method further includes: the PCRF determining a service chain function that the network can provide for the UE; the PCRF And formulating the service chain policy for the service flow, including: formulating the service chain policy according to the service chain requirement and the service chain function that the network can provide for the UE; the service chain policy includes: the service chain a service chain function corresponding to an intersection of a service chain function and a service chain function that can be provided to the UE; or, when the first message includes an application identifier of the service flow, the method further includes: Determining, by the PCRF, a service chain function that the network can provide for the service flow; the PCRF formulating a service chain policy for the service flow, including: according
  • the second message includes the UE user identifier, an application identifier of the service flow, an access point name, and the service At least one of the media types of the stream; when the second message includes the user identifier of the UE, the first service chain function list includes: a service chain function that the network can provide for the UE; or When the second message includes the application identifier of the service flow, the first service chain function list includes: a service chain function that the network can provide for the service flow; or the second message includes the When the access point name is used, the first service chain function list includes: a service chain function that the network can provide for the service flow that flows through the access point; or the second message includes the service When the media type of the stream is used, the first service chain function list includes: a service chain function that the network can provide for the service flow corresponding to the media type.
  • the service chain policy corresponds to a second service chain function list, where the second service chain function list includes the service chain The service chain function used by the policy; after the PCRF formulates a service chain policy for the service flow, the method further includes: the PCRF sending a fourth message to the AS via the SCEF, the fourth message A list of the second service chain functions is included.
  • the service chain requirement includes
  • the service chain policy includes a service chain function corresponding to the service function enabling unit deployed by the service provider when the service function of the service provider is configured by the service provider.
  • the first service chain function list includes the service chain function corresponding to the service function enabling unit deployed by the service provider.
  • an embodiment of the present invention provides another method for formulating a service chain policy, where the method
  • the application server AS determines that a service chain policy needs to be formulated for the service flow of the user equipment UE; the AS sends a first message to the charging rule function unit PCRF via the service capability open function unit SCEF, the first message is used for the request
  • the service flow defines a service chain policy, and the first message includes a service chain requirement of the service flow, to instruct the PCRF to formulate a service chain policy for the service flow according to the first message.
  • the determining, by the AS, the need to formulate a service chain policy for the service flow includes: determining, according to the fifth message received from the UE, that the service flow needs to be formulated a service chain policy, the fifth message is used to trigger the AS to request the PCRF to formulate a service chain policy for the service flow, or include: determining, by analyzing, that the UE has a service flow that needs to be performed, to determine A business chain strategy needs to be developed for the business flow.
  • the method before the AS sends the first message to the PCRF by using the SCEF, the method further includes: Sending, by the SCEF, the second message to the PCRF, where the second message is used to query the service flow to query a service chain function in the network; the AS receives the PCRF according to the second message by using the SCEF.
  • a third message that is sent, the third message includes a first service chain function list that the PCRF can provide to the AS, and the AS is configured according to the first service chain function list included in the third message, Determine the business chain requirements of the business flow.
  • the first message or the second message includes at least one of a user identifier, an application identifier, an access point name, and a media type. .
  • the method further includes: the AS receiving, by using the SCEF, a fourth message sent by the PCRF, the fourth message A second service chain function list is included, and the second service chain function list includes a service chain function used by the service chain policy.
  • the service chain requirement includes
  • the service chain policy includes a service chain function corresponding to the service function enabling unit deployed by the service provider when the service function of the service provider is configured by the service provider.
  • the first service chain function is provided when the service provider deploys the service function enabling unit in the service chain of the network, and the second message includes information indicating the service function enabling unit deployed by the service provider.
  • the service chain function corresponding to the service function enabling unit deployed by the service provider is included in the list.
  • an embodiment of the present invention provides a PCRF, which is used to formulate a service chain policy
  • the PCRF includes: a receiving unit, configured to receive, by using a service capability open function unit SCEF, a first message sent by an application server AS, where The first message is used to request a service chain policy for the service flow of the user equipment UE, the first message includes a service chain requirement of the service flow, and the processing unit is configured to: according to the foregoing included in the first message A service chain requirement of the service flow, and a service chain policy is formulated for the service flow, where the service chain policy includes a service chain function provided for the service flow.
  • the receiving unit is further configured to: before receiving the first message sent by the AS by using the SCEF, receive, by using the SCEF, the second message sent by the AS The second message is used to query the service flow to query the service chain function in the network;
  • the processing unit is further configured to: according to the second message, determine that the PCRF can provide the first to the AS a service chain function list;
  • the PCRF further includes: a sending unit, configured to send, by using the SCEF, a third message to the AS, where the third message includes the first service chain function list, where the service chain needs according to The first service chain function list is determined.
  • the first message includes a user identifier of the UE, an application identifier of the service flow, an access point name, and the At least one of the media types of the service flow; when the first message includes the user identifier of the UE, the processing unit is further configured to determine a service chain function that the network can provide for the UE; And formulating the service chain policy for the service flow, including: formulating the service chain policy according to the service chain requirement and the service chain function that the network can provide for the UE; the service chain policy includes: the service chain The service chain function in the demand and the intersection function of the service chain function that can be provided for the UE; or, when the first message includes the application identifier of the service flow, the processing unit is further configured to: determine that the network can be a service chain function provided by the service flow; the processing unit formulating a service chain policy for the service flow, including: according to the service chain requirement, and the network can provide the service
  • the second message includes the UE user identifier, an application identifier of the service flow, an access point name, and the service At least one of the media types of the stream; when the second message includes the user identifier of the UE, the first service chain function list includes: a service chain function that the network can provide for the UE; or When the second message includes the application identifier of the service flow, the first service chain function list includes: a service chain function that the network can provide for the service flow; or the second message includes the When the access point name is used, the first service chain function list includes: a service chain function that the network can provide for the service flow that flows through the access point; or the second message includes the service When the media type of the stream is used, the first service chain function list includes: a service chain function that the network can provide for the service flow corresponding to the media type.
  • the service chain policy corresponds to a second service chain function list, where the second service chain function list includes the service chain a service chain function used by the policy; the sending unit is further configured to: after the processing unit formulates a service chain policy for the service flow, send a fourth message to the AS via the SCEF, the fourth message A list of the second service chain functions is included.
  • the service chain requirement includes
  • the service chain policy includes a service chain function corresponding to the service function enabling unit deployed by the service provider when the service function of the service provider is configured by the service provider.
  • the first service chain function list includes the service chain function corresponding to the service function enabling unit deployed by the service provider.
  • an embodiment of the present invention provides an AS, which is used for formulating a service chain policy, where the AS includes: a processing unit, configured to determine that a service chain policy needs to be formulated for a service flow of the user equipment UE;
  • a sending unit configured to send, by using a service capability opening function unit SCEF, a first message to a charging rule function unit PCRF, where the first message is used to request a service chain policy for the service flow, where the first message includes the A service chain requirement of the service flow, to instruct the PCRF to formulate a service chain policy for the service flow according to the first message.
  • the processing unit determines that a service chain policy needs to be formulated for the service flow, including: determining, by analyzing, that the UE has a service flow that needs to be performed, to determine a requirement Determining a service chain policy for the service flow; or, the AS further includes: a receiving unit, configured to receive a fifth message sent by the UE; and correspondingly, the processing unit determines that a service chain policy needs to be formulated for the service flow, including: And determining, according to the fifth message that is received by the receiving unit, that a service chain policy needs to be formulated for the service flow, where the fifth message is used to trigger the AS to request the PCRF to formulate a service chain policy for the service flow.
  • the sending unit is further configured to send, by using the SCEF, a first message before sending the first message to the PCRF by using the SCEF.
  • the PCRF sends a second message, where the second message is used to query the service flow to query a service chain function in the network;
  • the receiving unit is configured to receive, by using the SCEF, the PCRF to send according to the second message.
  • the third message, the third message includes a first service chain function list that the PCRF can provide to the AS, and the processing unit is further configured to: according to the first service included in the third message A list of chain functions that determine the business chain requirements of the business flow.
  • the first message or the second message includes at least one of a user identifier, an application identifier, an access point name, and a media type. .
  • the receiving unit is further configured to receive, by using the SCEF, a fourth message sent by the PCRF, where the fourth The message includes a second service chain function list, and the second service chain function list includes a service chain function used by the service chain policy.
  • the service chain requirement includes
  • the service chain policy includes a service chain function corresponding to the service function enabling unit deployed by the service provider when the service function of the service provider is configured by the service provider.
  • the first service chain function list includes the service chain function corresponding to the service function enabling unit deployed by the service provider.
  • an embodiment of the present invention provides a communication system, where the communication system includes at least a PCRF and an AS, where the PCRF is the PCRF according to any one of the foregoing third aspects; AS of any of the four aspects.
  • the PCRF formulates a service chain policy suitable for the service flow according to the message that the AS sends the service flow requirement corresponding to the service, and the user in the prior art Compared with the development of a business chain strategy before it is attached to the network and before the specific business is executed, the business chain strategy is more flexible, so that more accurate and efficient business chain rules can be formulated.
  • FIG. 1 is a schematic structural diagram of a 3GPP system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of an application scenario according to an embodiment of the present disclosure
  • FIG. 3 is a flowchart of a method for formulating a service chain policy according to an embodiment of the present invention
  • FIG. 4 is a flowchart of another method for formulating a service chain policy according to an embodiment of the present invention.
  • FIG. 5 is an interaction flowchart of another method for formulating a service chain policy according to an embodiment of the present invention.
  • FIG. 6 is an interaction flowchart of a method for establishing a service according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a PCRF according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an AS according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of another PCRF according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of another AS according to an embodiment of the present invention.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • the system architecture of the current 3GPP can be as shown in FIG. 1 , and mainly includes the following network element: an evolved UMTS terrestrial radio access network (E-UTRAN) for implementing functions related to the wireless evolved network;
  • E-UTRAN evolved UMTS terrestrial radio access network
  • MME mobility management entity
  • S-GW serving gateway
  • a user plane anchor between networks
  • a packet data network gateway (PDN GW) is a user plane anchor between a 3GPP access network and a non-3GPP access network, and an external packet data network (PDN, Packet data network); PCRF unit for policy control rule formulation and flow-based charging; home subscriber server (HSS) for storing user subscription information; user equipment (UE, user equipment), The control plane interacts with the user plane through E-UTRAN and SAE.
  • UTRAN UMTS terrestrial radio access network
  • GSM/EDGE radio access network GERAN
  • Serving GPRS supporting node (SGSN), It is used to implement functions such as route forwarding, mobility management, session management, and user information storage in GPRS/UMTS networks.
  • the UE can implement communication with an external network.
  • the application scenario of the embodiment of the present invention may be as shown in FIG. 2, at least one service switching node exists between the operator gateway and the external network, and each service switching node supports at least one service function enabling unit and service switching.
  • the node can send the data packet in the service flow to the service function enabling unit supported by the service switching node.
  • the service function enabling unit can correspond to at least one value-added service, such as firewall, video compression, acceleration, and the like.
  • the service function enabling unit can be deployed by the operator.
  • the service function enabling unit may also be deployed by a third-party service provider to implement efficient integration with the service function enabling unit deployed by the operator, and provide richer value added for the service flow. Business choice.
  • a PCRF unit a service capability exposure function (SCEF) unit, and an application server (AS, application server) are also required in the application scenario.
  • SCEF is used to implement the discovery function of the network capability provided by the third-party service provider, the function of invoking the network capability, and the authentication, accounting, and the like of the request of the third-party service provider.
  • the AS is used to provide services for the service flow of the UE.
  • FIG. 3 is a flowchart of a method for formulating a service chain policy according to an embodiment of the present invention. As shown in FIG. 3, the method includes:
  • the AS sends a first message to the PCRF by using the SCEF, where the first message is used to request a service chain policy for the service flow, where the first message includes a service chain requirement of the service flow.
  • the PCRF receives the first message sent by the AS via the SCEF.
  • the PCRF formulates a service chain policy for the service flow according to the service chain requirement included in the first message, where the service chain policy includes a service chain function provided for the service flow.
  • the UE may trigger the AS to send a first message by using an indication to send a service chain policy for the service flow.
  • the service flow corresponds to the service of the UE, and the service flow is a packet flow that needs to be transmitted from the source to the destination when the service is executed.
  • the AS can also obtain the service flow that the UE needs to perform through its own analysis, thereby actively sending the first message.
  • the first message sent by the AS may be carried in an application programming interface (API) request, and the service flow included in the first message
  • the service chain requirement may be at least one of value-added services such as firewall, video compression, and acceleration.
  • the PCRF formulates a service chain policy for the service flow according to the service chain requirement, where the service chain function provided for the service flow refers to the value-added service provided for the service flow, that is, the service through which the service flow flows. Function enable unit.
  • the first message may further include a user identifier (UE ID), an application identifier (application ID) of the service flow, and an access point name according to specific scenario requirements. (APN, acess point name) and at least one of the media types.
  • UE ID user identifier
  • API application identifier
  • the PCRF can query the subscription data of the UE to the user profile storage (SPR) according to the context of the UE ID associated with the UE.
  • SPR user profile storage
  • the PCRF learns the service chain function that can be provided for the UE, and combines the service chain requirements proposed by the UE in the first message.
  • the PCRF formulates a service chain policy for the service flow
  • the service chain policy may include: The service chain function corresponding to the intersection of the service chain function and the service chain function that can be provided for the UE.
  • the PCRF can actively filter the service chain function suitable for the service flow for the service flow, and then combine the first
  • the service chain demanded by the UE the PCRF formulates a service chain strategy for the service flow
  • the service chain policy may include: a service chain corresponding to the service chain function in the service chain requirement and the service chain function provided for the service flow.
  • the PCRF formulates the service chain policy for the service flow in S303, the PCRF can be combined with the service.
  • the service chain policy is determined based on the chain requirement and the at least two service chain functions that can be provided for the service flow of the UE or the UE according to the information included in the first message, and the service chain policy may include: at least three corresponding to the foregoing Part of the business chain functions correspond to the business chain functions.
  • the service chain requirement may include a service chain function corresponding to the service function enabling unit of the service provider.
  • the PCRF can consider the service chain function corresponding to the service function enabling unit of the service provider.
  • the value-added services that the service function enabling unit deployed by the operator can support are: content filtering, caching service, video compression, and firewall.
  • the service provider also deploys service functions in the service chain.
  • the enabling unit, the service function enabling unit deployed by the service provider supports the acceleration function.
  • the service chain requirements of the UE service flow indicated in the first message include content filtering, cache service, video compression, and acceleration.
  • the PCRF defines a service chain service policy belonging to the UE service flow, and the service chain policy includes content filtering and cache service. , video compression and acceleration.
  • the PCRF associates with the UE's context according to the UE ID, and queries the SPR for the UE's subscription data to find that the UE does not have the right to filter the value-added service by using the content, and then the PCRF is in the service chain. This permission will be considered in the policy to exclude content filtering from the business chain strategy.
  • the method may further include:
  • the PCRF sends a fourth message to the AS via the SCEF, where the fourth message includes a service chain function list provided by the PCRF for the service flow policy.
  • the AS receives the fourth message sent by the PCRF via the SCEF.
  • S304 is a supplement to the foregoing method steps, and the purpose is to notify the AS of the result of the development of the service chain policy.
  • the beneficial effect is obvious, because the AS can know its The requirement is not fully satisfied.
  • the AS may decide to agree to the service chain policy, or take measures to coordinate attempts to modify the business chain strategy.
  • the service chain policy defined by the PCRF in S303 may correspond to a service chain function list, where the service chain function list includes the service chain function used by the service chain policy, that is, the PCRF referred to in the fourth message of S304 is the service.
  • the fourth message further includes charging information related to the corresponding service function enabling unit in the service chain function list in step S304.
  • the fourth message includes an identifier of the service chain policy, so as to subsequently authenticate the service chain policy in the service establishment process.
  • PCRF policy and charging enforcement function
  • the PCEF receives the response to the PCRF feedback policy via the flow classifier.
  • the PCRF sends a message that the service establishment success is successful to the AS via the SCEF.
  • the SCEF authenticates the first message of the AS to determine The validity of the operation is performed by the AS.
  • the SCEF confirms that the operation performed by the AS is legal, the SCEF sends the information contained in the first message to the PCRF.
  • the SCEF may select the PCRF to be forwarded according to the APN in the first message.
  • the SCEF may convert the API request into a Diameter message by using a Diameter protocol to send to the PCRF, and the Diameter message includes information included in the first message.
  • the PCRF formulates a service chain policy suitable for the service flow according to the message that the AS sends the service flow requirement corresponding to the service, and the user in the prior art Compared with the development of a business chain strategy before it is attached to the network and before the specific business is executed, the business chain strategy is more flexible, so that more accurate and efficient business chain rules can be formulated.
  • the technical solution of the present invention provides a low-cost implementation manner for the service flow of the UE service using the service chain function provided by the third-party service provider.
  • FIG. 4 is a flowchart of another method for formulating a service chain policy according to an embodiment of the present invention. The method is performed on the basis of the method shown in FIG. 3. Before S301, the method includes:
  • the AS sends a second message to the PCRF via the SCEF, where the second message is used to query the service flow to query a service chain function in the network.
  • the PCRF receives the second message sent by the AS via the SCEF.
  • the PCRF determines, according to the second message, a service chain function list that the PCRF can provide to the AS.
  • the PCRF sends a third message to the AS via the SCEF, where the third message includes a service chain function list that the PCRF can provide to the AS.
  • the AS receives the third message sent by the PCRF via the SCEF.
  • the AS determines, according to the service chain function list that the PCRF included in the third message is provided to the AS, the service chain requirement of the service flow.
  • the AS sends a second message to the PCRF via the SCEF, where the second message is used to query the service flow requesting which service function enabling units are deployed between the carrier gateway and the external network in the network.
  • the second message sent by the AS can be carried in the API request.
  • the PCRF forms all the service chain functions deployed in the network into a service chain function list according to the second message, and returns the information to the AS through the third message in S404.
  • the second message may include at least one of a UE ID, an application ID of the service flow, an APN, and a media type.
  • the PCRF can query the subscription data of the UE to the user profile storage (SPR) according to the context of the UE ID associated with the UE. According to the subscription data, the PCRF knows the service chain function that can be provided for the UE, and then the PCRF will be able to provide the service chain function list provided by the UE to the AS.
  • SPR user profile storage
  • the PCRF can actively filter the service flow function suitable for the service flow for the service flow, and
  • the service chain function of the service flow forms a list of service chain functions that are provided to the AS. If the APN or the media type is included in the first message, the functions and purposes are similar to the UE ID and the application ID. On the basis of all the service chain functions that can be provided to the AS, the UE or the service flow is reduced. It can provide the service chain function of AS to provide a more reference function list to AS, so that AS can propose more reasonable business chain requirements.
  • the second message includes the UE ID, the application identifier of the service flow, the APN, and the media class.
  • the PCRF can obtain the service chain functions that can be provided for the service flows of the UE or the UE respectively corresponding to the at least two types of information, and form a service chain function list on the basis of the intersection of the two. .
  • the second message may include information indicating a service chain function corresponding to the service function enabling unit of the service provider.
  • the PCRF determines the service chain function list that can be provided to the AS in S403, the service chain function corresponding to the service function enabling unit of the service provider can be included.
  • the value-added services that the service function enabling unit deployed by the operator can support are: content filtering, caching service, and firewall, and the service provider also deploys a service function enabling unit in the service chain.
  • the service function enablement unit deployed by the service provider supports acceleration.
  • the service chain function list provided by the PCRF to the AS may include content filtering, caching service, firewall, and acceleration function, so that the AS selects according to the characteristics of the service flow, and determines the service chain requirement.
  • the service chain function list provided by the PCRF to the AS may only have a cache service, a firewall, and an acceleration function.
  • the AS can select the actual need to provide the service flow in the service chain function provided to the AS according to the attribute of the service flow of the UE.
  • the business chain functions as a business chain requirement.
  • the AS selects the required service chain function according to the obtained service chain function list, so that the service chain requirement can be more reasonable, and the network side can better provide the service. Optimize the service.
  • the methods S401-S405 shown in FIG. 4 can also be implemented independently of the method shown in FIG. 3. After the step S405 is performed, the subsequent steps are stopped.
  • the AS can be triggered to query the PCRF for the service chain function in the network. After obtaining the service chain function list that the PCRF can provide to the AS, the AS can perform other functional steps according to actual needs. There is no limit here.
  • FIG. 5 is an interaction flowchart of another method for formulating a service chain policy according to an embodiment of the present invention.
  • the method is a more specific implementation step of the method shown in FIG. 3 and FIG. 4, and the interaction process involves a specific message delivery form, and before the AS requests to develop a service chain policy for the service flow, The AS also requests to query the service chain functions deployed in the network.
  • the method includes:
  • S501 The AS sends a first API request to the SCEF, where the service flow request is used to query a service chain function in the network.
  • the first API request may include information such as a UE ID, an application ID, an APN, and a media type.
  • the service enablement unit of the service provider When the service enablement unit of the service provider is deployed in the network, the service function enabling unit that belongs to the service provider may also be included. information.
  • the SCEF authenticates the first API request.
  • the SCEF sends a first request for converting the first API request to the Diameter protocol to the PCRF.
  • the information included in the first request of the Diameter protocol is the same as the first API request.
  • the PCRF is associated with the user context according to the UE ID, and acquires subscription data of the UE according to the UE ID.
  • the PCRF determines a first service chain function list that the network can provide for the service flow.
  • the PCRF needs to determine the service chain function that the network can provide for the service flow according to the acquired UE subscription data.
  • the PCRF sends a first request response to the SCEF, where the first request response includes a first service chain function list that the network can provide for the service flow.
  • the SCEF sends a first API response to the AS, where the first API response includes a first service chain function list.
  • the AS determines the service chain requirement of the service flow according to the first service chain function list and the attributes of the service flow.
  • the AS sends a second API request to the SCEF, where the request is used to request a service chain policy for the service flow.
  • the second API request includes the service chain requirement of the service flow determined by the AS.
  • the SCEF authenticates the second API request.
  • the SCEF converts the second API request into a second request under the Diameter protocol and sends the second request to the PCRF.
  • the information included in the second request of the Diameter protocol is the same as the second API request.
  • S512 and the PCRF formulate a service chain policy for the service flow according to the service chain requirement of the service flow determined by the AS.
  • the business chain strategy can be developed independently or in conjunction with other strategies in the PCC strategy.
  • S514 The traffic classifier sends the service chain policy to the PCEF.
  • the PCEF feeds back the traffic chain policy to the traffic classifier to receive the first response.
  • the flow classifier feeds back to the PCRF a second response response of the service chain policy.
  • the PCRF sends a second request response to the SCEF, which is used to indicate that the service chain policy is successfully formulated.
  • the SCEF sends a second API response to the AS to indicate that the service chain policy is successfully formulated.
  • the AS requests the network side to query the service chain function in the network, and the PCRF returns the service chain function list, and the AS selects the required service chain function according to the obtained service chain function list.
  • the business chain strategy can be formulated more accurately and efficiently, and the network side can better provide optimized services for the business.
  • FIG. 6 is an interaction flowchart of a method for establishing a service according to an embodiment of the present invention.
  • the method is a more specific implementation step of the method shown in FIG. 3 and FIG. 4, and a specific message delivery form is involved in the interaction process.
  • the method includes:
  • the AS sends a third API request to the SCEF, where the AS is configured to request a service chain policy for the service flow.
  • the third API request includes a service chain requirement of the service flow, and may further include a UE ID, an application ID, an APN, a media type, and the like.
  • the indication further includes the service provider.
  • the business function enables the information of the unit.
  • the SCEF authenticates the third API request.
  • the SCEF converts the third API request into a third request under the Diameter protocol and sends the third request to the PCRF.
  • the information included in the third request of the Diameter protocol is the same as the third API request.
  • the PCRF is associated with the user context according to the UE ID, and acquires subscription data of the user according to the UE ID.
  • the PCRF formulates a service chain policy for the service flow according to the service chain requirement included in the third request in the Diameter protocol.
  • the PCRF needs to formulate a service chain policy for the service flow according to the acquired UE subscription data.
  • the PCRF sends a third request response to the SCEF, where the third request response includes a service chain function included in the service chain policy to form a second service chain function list.
  • the SCEF sends a third API response to the AS, where the third API response includes a second service chain function list.
  • the AS sends a fourth API request to the SCEF to request to establish a service corresponding to the service flow.
  • the fourth API request includes a service chain policy identifier.
  • the SCEF authenticates the fourth API request.
  • the SCEF sends a fourth request for converting the fourth API request to the Diameter protocol to the PCRF.
  • the fourth request of the Diameter protocol includes a service chain policy identifier.
  • the PCRF determines that the service chain policy corresponding to the service chain policy identifier is a service chain policy defined for the service flow before the PCRF.
  • the PCRF sends the service chain policy corresponding to the service chain policy identifier to the traffic classifier.
  • the traffic classifier sends the service chain policy to the PCEF.
  • the PCEF feeds back to the flow classifier a third acceptance response of the service chain policy.
  • the flow classifier feeds back to the PCRF a fourth response response of the service chain policy.
  • S616 The PCRF sends a fourth request response to the SCEF, where the service corresponding to the service flow is successfully established.
  • the SCEF sends a fourth API response to the AS to indicate that the service of the service flow is successfully established.
  • the AS initiates transmission of uplink data.
  • the AS requests the PCRF to formulate a service chain policy, where the request includes a service chain requirement, and the PCRF directly formulates a service chain policy according to the service chain requirement.
  • the PCRF establishes services based on the service chain policies previously established for the AS.
  • the embodiment of the present invention further provides a PCRF 700 and an AS 800.
  • FIG. 7 it is a schematic structural diagram of a PCRF 700 .
  • FIG. 8 it is a schematic structural diagram of an AS800.
  • PCRF700 includes:
  • the receiving unit 710 is configured to receive, by using the SCEF, a first message sent by the AS, where the first message is used to request a service chain policy for a service flow of the user equipment UE, where the first message includes a service chain requirement of the service flow. ;
  • the processing unit 720 is configured to formulate a service chain policy for the service flow according to a service chain requirement of the service flow included in the first message, where the service chain policy includes a service chain function provided for the service flow .
  • AS800 includes:
  • the processing unit 810 is configured to determine that a service chain policy needs to be formulated for the service flow of the user equipment UE;
  • the sending unit 820 is configured to send, by using the SCEF, a first message, where the first message is used to request a service chain policy for the service flow, where the first message includes a service chain requirement of the service flow, to indicate
  • the PCRF formulates a service chain policy for the service flow according to the first message.
  • the UE may send the first message to the sending unit 820 of the AS 800 to send a service chain policy for the service flow.
  • the service flow corresponds to the service of the UE, and the service flow is a packet flow that needs to be transmitted from the source to the destination when the service is executed.
  • the AS can also obtain the service flow that the UE needs to perform through its own analysis, and determine that a service chain policy needs to be formulated for the service flow, so as to actively send the first message.
  • the first message sent by the AS800 can be carried in the API request.
  • the service chain requirement of the service flow included in the first message may be at least one of value-added services such as firewall, video compression, and acceleration.
  • the processing unit 720 of the PCRF 700 formulates a service chain policy for the service flow according to the service chain requirement, where the service chain function provided for the service flow refers to the value-added service provided for the service flow, that is, the service flow flows through.
  • Business function enable unit is a service chain policy for the service flow according to the service chain requirement, where the service chain function provided for the service flow refers to the value-added service provided for the service flow, that is, the service flow flows through.
  • the first message may include at least one of a UE ID, an application ID of the service flow, an APN, and a media type, in addition to the service chain requirement of the service flow, according to specific scenario requirements.
  • the processing unit 720 of the PCRF 700 can query the subscription data of the UE by using the SPR according to the context in which the UE ID is associated with the UE. Based on the subscription data, the PCRF700 learns the service chain function that can be provided for the UE. In combination with the service chain requirements proposed by the UE in the first message, the PCRF700 formulates a service chain policy for the service flow.
  • the service chain policy may include: a service chain in the service chain requirement.
  • the service chain function corresponding to the function and the intersection of the service chain functions that can be provided for the UE.
  • the processing unit 710 of the PCRF 700 can actively filter the service chain function suitable for the service flow for the service flow.
  • the processing unit 720 of the PCRF 700 formulates a service chain policy for the service flow.
  • the service chain policy may include: a service chain function in the service chain requirement and a service chain that can be provided for the service flow.
  • the function of the business chain corresponding to the intersection of functions. If the first message includes an APN or a media type, their functions and purposes are similar to the UE ID and the application ID, and a more accurate service chain policy is defined for the service flow by narrowing the service chain function selection range.
  • the processing unit 720 of the PCRF 700 formulates a service chain policy for the service flow
  • the PCRF may be Based on the service chain requirements and at least two service chain functions that can be obtained for the service flow of the UE or the UE based on the information contained in the first message,
  • the service chain strategy may include: an intersection function of the at least three corresponding service chain functions corresponding to the above.
  • the service chain requirement may include a service chain function corresponding to the service function enabling unit of the service provider.
  • the processing unit of the PCRF 700 formulates the service chain policy, it can consider including the service chain function corresponding to the service function enabling unit of the service provider.
  • the PCRF 700 further includes a sending unit 730, configured to send, by using the SCEF, a fourth message to the AS after the processing unit 720 formulates a service chain policy for the service flow, where the fourth message includes a PCRF a list of service chain functions provided in the business chain strategy formulated by the business flow;
  • the AS 800 further includes a receiving unit 830 for receiving a fourth message sent by the PCRF via the SCEF.
  • the PCRF700 sending unit 730 notifies the AS800 of the result of the service chain policy.
  • the service chain policy and the service chain requirement actually formulated by the PCRF700 are not completely consistent, the beneficial effect is obvious, because the AS800 can know that its requirement is not completely satisfied.
  • the AS800 may decide to agree to the service chain strategy or take measures to coordinate attempts to modify the business chain strategy.
  • the service chain policy defined by the PCRF may correspond to a service chain function list, where the service chain function list includes the service chain function used by the service chain policy, that is, the PCRF indicated in the fourth message is defined for the service flow.
  • the fourth message further includes charging information related to the corresponding service function enabling unit in the service chain function list provided in the service chain policy for the service flow.
  • the fourth message includes an identifier of the service chain policy, so as to subsequently authenticate the service chain policy in the service establishment process.
  • the PCRF formulates a service chain policy suitable for the service flow according to the message that the AS sends the service flow requirement corresponding to the service, and the user in the prior art Compared with the development of a business chain strategy before it is attached to the network and before the specific business is executed, the business chain strategy is more flexible, so that more accurate and efficient business chain rules can be formulated.
  • the technical solution of the present invention provides a low-cost implementation manner for the service flow of the UE service using the service chain function provided by the third-party service provider.
  • the sending unit 820 of the AS800 is further configured to send, by using the SCEF, a second message to the PCRF, where the second message is used to request a query for the service flow, before sending the first message to the PCRF by using the SCEF.
  • Business chain functions in the network.
  • the receiving unit 710 of the PCRF 700 is further configured to receive, by using the SCEF, the second message sent by the AS before receiving the first message sent by the AS via the SCEF.
  • the processing unit 720 of the PCRF 700 is further configured to determine, according to the second message, a service chain function list that the PCRF can provide to the AS.
  • the sending unit 730 of the PCRF 700 is further configured to send, by using the SCEF, a third message to the AS, where the third message includes a service chain function list that the PCRF 700 can provide to the AS800.
  • the receiving unit 830 of the AS 800 is further configured to receive, by using the SCEF, a third message that is sent by the PCRF 700 according to the second message.
  • the processing unit 820 of the AS 800 is further configured to determine a service chain requirement of the service flow according to the service chain function list that the PCRF 700 included in the third message can provide to the AS.
  • the AS800 can know the service chain function list that the PCRF700 can provide to the AS800 in advance. It is obvious that the AS800 can propose a more reasonable service chain requirement and avoid the PCRF700.
  • the business chain functions that cannot be provided are included in the business chain requirements.
  • the second message sent by the AS can be carried in the API request.
  • the processing unit 720 of the PCRF 700 forms all the service chain functions deployed in the network into a service chain function list according to the second message, and returns the information to the AS 800 through the third message.
  • the second message may include at least one of a UE ID, an application ID of the service flow, an APN, and a media type.
  • the second message may include information indicating a service chain function corresponding to the service function enabling unit of the service provider.
  • processing unit 720 of PCRF 700 determines that it can be provided to the AS When the service chain function list is listed, the service chain function corresponding to the service function enabling unit of the service provider can be included.
  • the processing unit 810 of the AS800 can select the actual service flow for the service chain function provided to the AS800 according to the attribute of the service flow of the UE. Provides business chain functionality as a business chain requirement.
  • the AS selects the required service chain function according to the obtained service chain function list, so that the service chain requirement can be more reasonable, and the network side can better provide the service. Optimize the service.
  • the foregoing AS800 requests the PCRF700 to query the service chain function in the network, and the AS800 can request the PCRF700 to perform a service chain policy function for the service flow. That is, when the UE needs to perform a certain service, the AS800 can be triggered to query the PCRF700 for the service chain function in the network. After obtaining the service chain function list that the PCRF700 can provide to the AS800, the AS800 can perform other functions according to actual needs. Steps, so there is no limit here.
  • FIG. 9 it is a schematic structural diagram of another PCRF 900.
  • FIG. 10 it is a schematic structural diagram of another AS1000.
  • PCRF 1000 includes a processor 910, a memory 920, a communication interface 930, and a bus 940 that stores execution instructions that are passed between the processor 910 and the memory 920 when the device is running.
  • the bus 940 communicates, the processor 910 receives and transmits information through the communication interface 930, and performs the steps of the method disclosed in the method embodiments provided in the embodiments of the present invention, in accordance with the computer instructions stored in the memory 920.
  • the AS 1000 includes a processor 1010, a memory 1020, a communication interface 1030, and a bus 1040 that stores execution instructions between the processor 1010 and the memory 1020 when the device is running.
  • the processor 1010 receives and transmits information through the communication interface 1030, and performs the steps of the method disclosed in the method embodiments provided in the embodiments of the present invention, in accordance with the computer instructions stored in the memory 1020.
  • the PCRF when the user needs to perform a certain service, the PCRF formulates a service suitable for the service according to the message that is sent by the AS and includes the service flow requirement corresponding to the service.
  • the business chain strategy of the flow is more flexible and more accurate and efficient than the prior art method of formulating the business chain strategy before the user attaches to the network and does not explicitly specify which service to perform.
  • Business chain rules were developed.
  • the processor described in FIG. 9 and FIG. 10 may be a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, and a discrete gate. Or transistor logic devices, discrete hardware components.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the computer instructions can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in a memory, and the processor reads the information in the memory and, in conjunction with its hardware, performs the steps of the methods of the various embodiments.
  • the “first”, “second”, “third”, “fourth” and the like only represent different objects, such as different messages, different service chain function lists, and It does not have a substantial limit in itself.

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Abstract

本发明实施例提供了业务链策略的制定方法，包括：单元PCRF经由SCEF接收AS发送的第一消息，所述第一消息用于请求为UE的业务流制定业务链策略，所述第一消息包括所述业务流的业务链需求；所述PCRF根据所述第一消息中包括的所述业务流的业务链需求，为所述业务流制定业务链策略，所述业务链策略包括为所述业务流提供的业务链功能。本发明实施例提供的技术方案，在用户需要进行某业务时，PCRF根据AS发送的包含该业务所对应的业务流需求的消息制定出适合该业务流的业务链策略，与现有技术中用户在附着到网络时、尚未明确具体执行何种业务之前就制定业务链策略相比，该业务链策略的制定方式更加灵活，从而更加准确、高效的业务链规则得以制定。

Description

一种业务链策略的制定方法及设备 技术领域
本发明涉及通信技术领域，具体涉及一种业务链策略的制定方法及设备。
背景技术
第三代合作伙伴计划(3GPP，3rd generation partnership project)在系统架构演进(SAE，system architecture evolution)项目中构造了SAE系统架构。其中，在运营商网关和外部网络之间能够部署至少一个业务功能使能(service function enabler)单元，以形成业务链。
在移动、固定宽带和数据中心应用等领域，特定用户的特定业务流存在至少一个增值业务服务需求。每个增值业务服务需求对应至少一个业务功能使能单元。例如，视频业务流需要经过缓存服务和防火墙这两个增值业务服务对应的业务功能使能单元所形成的业务链，通过缓存服务和防火墙来完成该视频业务流的增值业务服务。
现有技术中，特定业务流需要经过的业务链由策略与计费规则功能(PCRF，policy and charging rules function)单元生成的业务链策略确定，该策略的制定依赖于用户的相关信息，并且在用户附着到网络、建立缺省承载时就已经确定。而实际上，用户在使用特定业务时，该特定业务的业务流所需要经过的业务使能单元可能并不在用户附着到网络时确定的业务链策略之中，或者该业务链策略包含了该特定业务流不需要的业务使能单元，显然这样的业务链策略制定方式是不够准确、灵活的。
因此，如何能够灵活地制定更准确的业务链策略，是亟需解决的问题。
发明内容
针对现有技术的上述问题，本发明实施例提供了一种业务链策略的制定方法、相关设备及系统，能够灵活、准确地制定业务链策略。
第一方面，本发明实施例提供了一种业务链策略的制定方法，所述方法包括：策略与计费规则功能单元PCRF经由服务能力开放功能单元SCEF接收应用服务器AS发送的第一消息，所述第一消息用于请求为用户设备UE的业务 流制定业务链策略，所述第一消息包括所述业务流的业务链需求；所述PCRF根据所述第一消息中包括的所述业务流的业务链需求，为所述业务流制定业务链策略，所述业务链策略包括为所述业务流提供的业务链功能。
结合第一方面，在第一方面的第一种实现方式中，在所述PCRF经由SCEF接收AS发送的第一消息之前，所述方法还包括：所述PCRF经由所述SCEF接收所述AS发送的第二消息，所述第二消息用于为所述业务流请求查询网络中的业务链功能；所述PCRF根据所述第二消息，确定所述PCRF能够提供给所述AS的第一业务链功能列表；所述PCRF经由所述SCEF向所述AS发送第三消息，所述第三消息包括所述第一业务链功能列表，所述业务链需求根据所述第一业务链功能列表确定。
结合第一方面及其上述实现方式，在第一方面的第二种实现方式中，所述第一消息包括所述UE的用户标识、所述业务流的应用标识、接入点名称以及所述业务流的媒体类型中的至少一种；所述第一消息包括所述UE的用户标识时，所述方法进一步包括：所述PCRF确定网络能够为所述UE提供的业务链功能；所述PCRF为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为所述UE提供的业务链功能制定所述业务链策略；所述业务链策略包括：所述业务链需求中的业务链功能和能够为所述UE提供的业务链功能的交集所对应的业务链功能；或者，所述第一消息包括所述业务流的应用标识时，所述方法进一步包括：所述PCRF确定网络能够为所述业务流提供的业务链功能；所述PCRF为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为所述业务流提供的业务链功能制定所述业务链策略；所述业务链策略包括：所述业务链需求中的业务链功能和能够为所述业务流提供的业务链功能的交集所对应的业务链功能；或者，所述第一消息包括所述接入点名称时，所述方法进一步包括：所述PCRF确定网络能够为流经所述接入点的所述业务流提供的业务链功能；所述所述PCRF为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为流经所述接入点的所述业务流提供的业务链功能制定所述业务链策略；所述业务链策略包括：所述业务链需求中的业务链功能和能够为流经所述接入点的所述业务流提供的业务链功能的交集所对应的业务链功能；或者，所述第一消息包括所述业务流的媒体 类型时，所述方法进一步包括：所述PCRF根据所述媒体类型确定网络能够为所述业务流提供的业务链功能；所述PCRF为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为所述业务流提供的业务链功能制定所述业务链策略；所述业务链策略包括：所述业务链需求中的业务链功能和能够为所述业务流提供的业务链功能的交集所对应的业务链功能。
结合第一方面及其上述实现方式，在第一方面的第三种实现方式中，所述第二消息包括所述UE用户标识、所述业务流的应用标识、接入点名称以及所述业务流的媒体类型中的至少一种；所述第二消息包括所述UE的用户标识时，所述第一业务链功能列表包括：所述网络能够为所述UE提供的业务链功能；或者，所述第二消息包括所述业务流的应用标识时，所述第一业务链功能列表包括：所述网络能够为所述业务流提供的业务链功能；或者，所述第二消息包括所述接入点名称时，所述第一业务链功能列表包括：所述网络能够为流经所述接入点的所述业务流提供的业务链功能；或者，所述第二消息包括所述业务流的媒体类型时，所述第一业务链功能列表包括：所述网络能够为对应所述媒体类型的所述业务流提供的业务链功能。
结合第一方面及其上述实现方式，在第一方面的第四种实现方式中，所述业务链策略对应有第二业务链功能列表，所述第二业务链功能列表中包括所述业务链策略所使用的业务链功能；在所述PCRF为所述业务流制定业务链策略之后，所述方法还包括：所述PCRF经由所述SCEF向所述AS发送第四消息，所述第四消息包括所述第二业务链功能列表。
结合第一方面及其上述实现方式，在第一方面的第五种实现方式中，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述业务链需求包括所述服务提供商部署的业务功能使能单元对应的业务链功能时，所述业务链策略包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
结合第一方面及其上述实现方式，在第一方面的第六种实现方式中，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述第二消息包括指示所述服务提供商部署的业务功能使能单元的信息时，所述第一业务链功能列表中包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
第二方面，本发明实施例提供了另一种业务链策略的制定方法，所述方法 包括：应用服务器AS确定需要为用户设备UE的业务流制定业务链策略；所述AS经由服务能力开放功能单元SCEF向计费规则功能单元PCRF发送第一消息，所述第一消息用于请求为所述业务流制定业务链策略，所述第一消息包括所述业务流的业务链需求，以指示所述PCRF根据所述第一消息为所述业务流制定业务链策略。
结合第二方面，在第二方面的第一种实现方式中，所述AS确定需要为业务流制定业务链策略，包括：根据从所述UE接收到的第五消息，确定需要为业务流制定业务链策略，所述第五消息用于触发所述AS向所述PCRF请求为所述业务流制定业务链策略；或者，包括：通过分析得出所述UE存在需要执行的业务流，来确定需要为业务流制定业务链策略。
结合第二方面及其上述实现方式，在第二方面的第二种实现方式中，在所述AS经由所述SCEF向所述PCRF发送第一消息之前，所述方法还包括：所述AS经由所述SCEF向所述PCRF发送第二消息，所述第二消息用于为所述业务流请求查询网络中的业务链功能；所述AS经由所述SCEF接收所述PCRF根据所述第二消息发送的第三消息，所述第三消息包括所述PCRF能够提供给所述AS的第一业务链功能列表；所述AS根据所述第三消息中包括的所述第一业务链功能列表，确定所述业务流的业务链需求。
结合第二方面及其上述实现方式，在第二方面的第三种实现方式中，所述第一消息或者第二消息包括用户标识、应用标识、接入点名称以及媒体类型中的至少一种。
结合第二方面及其上述实现方式，在第二方面的第四种实现方式中，所述方法还包括：所述AS经由所述SCEF接收所述PCRF发送的第四消息，所述第四消息包括第二业务链功能列表，所述第二业务链功能列表中包括所述业务链策略所使用的业务链功能。
结合第二方面及其上述实现方式，在第二方面的第五种实现方式中，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述业务链需求包括所述服务提供商部署的业务功能使能单元对应的业务链功能时，所述业务链策略包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
结合第二方面及其上述实现方式，在第二方面的第六种实现方式中，当服 务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述第二消息包括指示所述服务提供商部署的业务功能使能单元的信息时，所述第一业务链功能列表中包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
第三方面，本发明实施例提供了一种PCRF，用于业务链策略的制定，所述PCRF包括：接收单元，用于经由服务能力开放功能单元SCEF接收应用服务器AS发送的第一消息，所述第一消息用于请求为用户设备UE的业务流制定业务链策略，所述第一消息包括所述业务流的业务链需求；处理单元，用于根据所述第一消息中包括的所述业务流的业务链需求，为所述业务流制定业务链策略，所述业务链策略包括为所述业务流提供的业务链功能。
结合第三方面，在第三方面的第一种实现方式中，所述接收单元还用于，在经由SCEF接收AS发送的第一消息之前，经由所述SCEF接收所述AS发送的第二消息，所述第二消息用于为所述业务流请求查询网络中的业务链功能；所述处理单元还用于，根据所述第二消息，确定所述PCRF能够提供给所述AS的第一业务链功能列表；所述PCRF还包括：发送单元，用于经由所述SCEF向所述AS发送第三消息，所述第三消息包括所述第一业务链功能列表，所述业务链需求根据所述第一业务链功能列表确定。
结合第三方面及其上述实现方式，在第三方面的第二种实现方式中，所述第一消息包括所述UE的用户标识、所述业务流的应用标识、接入点名称以及所述业务流的媒体类型中的至少一种；所述第一消息包括所述UE的用户标识时，所述处理单元还用于，确定网络能够为所述UE提供的业务链功能；所述处理单元为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为所述UE提供的业务链功能制定所述业务链策略；所述业务链策略包括：所述业务链需求中的业务链功能和能够为所述UE提供的业务链功能的交集功能；或者，所述第一消息包括所述业务流的应用标识时，所述处理单元还用于，确定网络能够为所述业务流提供的业务链功能；所述处理单元为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为所述业务流提供的业务链功能制定所述业务链策略；所述业务链策略包括：所述业务链需求中的业务链功能和能够为所述业务流提供的业务链功能的交集功能；或者，所述第一消息包括所述接入点名称时，所述处理单元还用于，确定网络能 够为流经所述接入点的所述业务流提供的业务链功能；所述处理单元为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为流经所述接入点的所述业务流提供的业务链功能制定所述业务链策略；所述业务链策略包括：所述业务链需求中的业务链功能和能够为流经所述接入点的所述业务流提供的业务链功能的交集功能；或者，所述第一消息包括所述业务流的媒体类型时，所述处理单元还用于根据所述媒体类型确定网络能够为所述业务流提供的业务链功能；所述处理单元为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为所述业务流提供的业务链功能制定所述业务链策略；所述业务链策略包括：所述业务链需求中的业务链功能和能够为所述业务流提供的业务链功能的交集功能。
结合第三方面及其上述实现方式，在第三方面的第三种实现方式中，所述第二消息包括所述UE用户标识、所述业务流的应用标识、接入点名称以及所述业务流的媒体类型中的至少一种；所述第二消息包括所述UE的用户标识时，所述第一业务链功能列表包括：所述网络能够为所述UE提供的业务链功能；或者，所述第二消息包括所述业务流的应用标识时，所述第一业务链功能列表包括：所述网络能够为所述业务流提供的业务链功能；或者，所述第二消息包括所述接入点名称时，所述第一业务链功能列表包括：所述网络能够为流经所述接入点的所述业务流提供的业务链功能；或者，所述第二消息包括所述业务流的媒体类型时，所述第一业务链功能列表包括：所述网络能够为对应所述媒体类型的所述业务流提供的业务链功能。
结合第三方面及其上述实现方式，在第三方面的第四种实现方式中，所述业务链策略对应有第二业务链功能列表，所述第二业务链功能列表中包括所述业务链策略所使用的业务链功能；所述发送单元还用于，在所述处理单元为所述业务流制定业务链策略之后，经由所述SCEF向所述AS发送第四消息，所述第四消息包括所述第二业务链功能列表。
结合第三方面及其上述实现方式，在第三方面的第五种实现方式中，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述业务链需求包括所述服务提供商部署的业务功能使能单元对应的业务链功能时，所述业务链策略包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
结合第三方面及其上述实现方式，在第三方面的第六种实现方式中，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述第二消息包括指示所述服务提供商部署的业务功能使能单元的信息时，所述第一业务链功能列表中包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
第四方面，本发明实施例提供了一种AS，用于业务链策略的制定，所述AS包括：处理单元，用于确定需要为用户设备UE的业务流制定业务链策略；
发送单元，用于经由服务能力开放功能单元SCEF向计费规则功能单元PCRF发送第一消息，所述第一消息用于请求为所述业务流制定业务链策略，所述第一消息包括所述业务流的业务链需求，以指示所述PCRF根据所述第一消息为所述业务流制定业务链策略。
结合第四方面，在第四方面的第一种实现方式中，所述处理单元确定需要为业务流制定业务链策略，包括：通过分析得出所述UE存在需要执行的业务流，来确定需要为业务流制定业务链策略；或者，所述AS进一步包括：接收单元，用于接收所述UE发送的第五消息；相应地，所述处理单元确定需要为业务流制定业务链策略，包括：根据所述接收单元接收的所述第五消息，确定需要为业务流制定业务链策略，所述第五消息用于触发所述AS向所述PCRF请求为所述业务流制定业务链策略。
结合第四方面及其上述实现方式，在第四方面的第二种实现方式中，所述发送单元还用于，经由所述SCEF向所述PCRF发送第一消息之前，经由所述SCEF向所述PCRF发送第二消息，所述第二消息用于为所述业务流请求查询网络中的业务链功能；所述接收单元用于，经由所述SCEF接收所述PCRF根据所述第二消息发送的第三消息，所述第三消息包括所述PCRF能够提供给所述AS的第一业务链功能列表；所述处理单元还用于，根据所述第三消息中包括的所述第一业务链功能列表，确定所述业务流的业务链需求。
结合第四方面及其上述实现方式，在第四方面的第三种实现方式中，所述第一消息或者第二消息包括用户标识、应用标识、接入点名称以及媒体类型中的至少一种。
结合第四方面及其上述实现方式，在第四方面的第四种实现方式中，所述接收单元还用于，经由所述SCEF接收所述PCRF发送的第四消息，所述第四 消息包括第二业务链功能列表，所述第二业务链功能列表中包括所述业务链策略所使用的业务链功能。
结合第四方面及其上述实现方式，在第四方面的第五种实现方式中，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述业务链需求包括所述服务提供商部署的业务功能使能单元对应的业务链功能时，所述业务链策略包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
结合第四方面及其上述实现方式，在第四方面的第六种实现方式中，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述第二消息包括指示所述服务提供商部署的业务功能使能单元的信息时，所述第一业务链功能列表中包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
第五方面，本发明实施例提供了一种通信系统，所述通信系统中至少包含了PCRF和AS；其中，所述PCRF为上述第三方面任一所述的PCRF；所述AS为上述第四方面任一所述的AS。
本发明实施例提供的技术方案，在用户需要进行某业务时，PCRF根据AS发送的包含该业务所对应的业务流需求的消息制定出适合该业务流的业务链策略，与现有技术中用户在附着到网络时、尚未明确具体执行何种业务之前就制定业务链策略相比，该业务链策略的制定方式更加灵活，从而更加准确、高效的业务链规则得以制定。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种3GPP系统构架图；
图2为本发明实施例提供的一种应用场景图；
图3为本发明实施例提供的一种业务链策略制定方法的流程图；
图4为本发明实施例提供的另一种业务链策略制定方法的流程图；
图5为本发明实施例提供的另一种业务链策略制定方法的交互流程图；
图6为本发明实施例提供的一种业务建立的方法的交互流程图；
图7为本发明实施例提供的一种PCRF的结构示意图；
图8为本发明实施例提供的一种AS的的结构示意图；
图9为本发明实施例提供的另一种PCRF的结构示意图；
图10为本发明实施例提供的另一种AS的的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明的一部分实施例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都应属于本发明保护的范围。
本发明的技术方案，可以应用于各种通信系统，例如：全球移动通讯系统(GSM，global system of mobile communication)，码分多址(CDMA，code division multiple access)系统，宽带码分多址(WCDMA，wideband code division multiple access wireless)系统，通用分组无线业务(GPRS，general packet radio service)系统，以及LTE系统等。
目前3GPP的系统构架可以如图1所示，主要包括如下网元：演进的UMTS陆地无线接入网(E-UTRAN，evolved UMTS terrestrial radio access network)，用于实现与无线演进网络有关的功能；移动性管理实体(MME，mobility management entity)，负责控制面的移动性管理，如用户上下文和移动状态管理以及分配用户临时身份标识等；服务网关(S-GW,serving gateway)，是3GPP接入网络间的用户面锚点；分组数据网络网关(PDN GW，packet data network gateway)，是3GPP接入网络和非3GPP接入网络之间的用户面锚点，以及和外部分组数据网络(PDN，packet data network)的接口；PCRF单元，用于策略控制规则的制定以及基于流的计费；归属网络服务器(HSS，home subscriber server)用于存储用户签约信息；用户设备(UE，user equipment)，通过E-UTRAN与SAE进行控制面与用户面交互。UMTS陆地无线接入网(UTRAN，UMTS terrestrial radio access network)、GSM/EDGE无线接入网(GERAN，GSM/EDGE radio access network)，用于实现所有与现有GPRS/UMTS网络中与无线有关的功能。服务通用分组无线业务支持节点(SGSN，serving GPRS supporting node)， 用于实现GPRS/UMTS网络中路由转发、移动性管理、会话管理以及用户信息存储等功能。通过以上网元，UE可以实现与外部网络(external network)的通信。
本发明实施例的应用场景可以如图2所示，运营商网关和外部网络之间存在至少一个业务交换节点(service switch),每个业务交换节点都支持至少一个业务功能使能单元，业务交换节点可以将业务流中的数据包发送至该业务交换节点所支持的业务功能使能单元。业务功能使能单元可以对应至少一种增值业务，比如防火墙、视频压缩、加速等等。业务功能使能单元可以是运营商部署的。在本发明实施例提供的技术方案下，业务功能使能单元也可以由第三方服务提供商部署，以实现与运营商部署的业务功能使能单元的高效整合，为业务流提供更丰富的增值业务选择。为了实现本发明实施例提供的技术方案，所述应用场景中还需要PCRF单元、服务能力开放功能(SCEF，service capability exposure function)单元以及应用服务器(AS，application server)。其中，SCEF用于实现对第三方服务提供商提供网络能力的发现功能，以及调用该网络能力的功能、对第三方服务提供商的请求进行鉴权、计费等功能。AS用于为UE的业务流提供服务。
图3是本发明实施例提供的一种业务链策略制定方法的流程图，如图3所示，所述方法包括：
S301、AS经由SCEF向PCRF发送第一消息，所述第一消息用于请求为业务流制定业务链策略，所述第一消息包括所述业务流的业务链需求。
S302、PCRF经由SCEF接收AS发送的第一消息。
S303、PCRF根据所述第一消息中包括的所述业务链需求，为所述业务流制定业务链策略，所述业务链策略包括为所述业务流提供的业务链功能。
对于该方法来说，在网络附着成功后的UE，有业务需要被执行时，UE可以通过发送指示的方式，触发AS发送第一消息，用于请求为业务流制定业务链策略。其中，该业务流对应了UE的业务，该业务流即为执行所述业务时需要从源到目的进行传输的分组流。当然，AS也能够通过自身的分析，得出UE存在需要执行的业务流，从而主动发送第一消息。
对于上述S301，可选的，AS发送的第一消息可以承载在应用程序接口(API，application programming interface)请求中，第一消息中包括的业务流 的业务链需求可以是防火墙、视频压缩、加速等增值业务中的至少一种。相应地，S303中，PCRF根据业务链需求，为业务流制定业务链策略，其中为所述业务流提供的业务链功能指的是为业务流提供的增值业务，也即业务流流经的业务功能使能单元。
进一步的，该第一消息除了包括业务流的业务链需求外，根据具体的场景需求，还可以包括用户标识(UE ID，UE identity)、业务流的应用标识(application ID)、接入点名称(APN，acess point name)以及媒体类型中的至少一种。如，若第一消息中包含了UE ID，那么PCRF就能够根据UE ID关联到UE的上下文，向用户属性存储器(SPR，subscription profile repository)查询UE的签约数据。根据签约数据，PCRF获知了能够为UE提供的业务链功能，结合第一消息中UE提出的业务链需求，S303中PCRF为业务流制定业务链策略，业务链策略可以包括：业务链需求中的业务链功能和能够为UE提供的业务链功能的交集所对应的业务链功能。又如，若第一消息中包含了application ID，这个application ID对应了当前业务流的属性，那么PCRF就能够主动的为业务流筛选适合于该业务流的业务链功能，在此基础上结合第一消息中UE提出的业务链需求，PCRF为业务流制定业务链策略，业务链策略可以包括：业务链需求中的业务链功能和能够为业务流提供的业务链功能的交集所对应的业务链功能。若第一消息中包含APN或者媒体类型，那么他们的功能和目的与UE ID、application ID类似，通过缩小业务链功能选择范围来为业务流制定更准确的业务链策略。
当第一消息中包含了UE ID、业务流的应用标识、APN以及媒体类型中的至少两种时，可以理解的是，在S303中PCRF为业务流制定业务链策略时，PCRF可以在结合业务链需求和至少两种根据第一消息中包含的信息获知的能够为UE或者UE的业务流提供的业务链功能的基础之上，制定业务链策略，业务链策略可以包括：以上对应的至少三部分的业务链功能的交集所对应的业务链功能。
可选的，如果服务提供商在网络中部署了自身的业务功能使能单元，那么业务链需求中可以包括属于服务提供商的业务功能使能单元对应的业务链功能。这样，PCRF在制定业务链策略时，就能够考虑将服务提供商的业务功能使能单元对应的业务链功能纳入其中。
举例来说，考虑这样一种场景，运营商部署的业务功能使能单元可以支持的增值业务有：内容过滤、缓存服务、视频压缩以及防火墙，方服务提供商在业务链中也部署了业务功能使能单元，该服务提供商部署的业务功能使能单元支持加速功能。现第一消息中所指示的UE业务流的业务链需求包括了内容过滤、缓存服务、视频压缩以及加速，那么PCRF制定了属于UE业务流业务链策略，业务链策略中包括内容过滤、缓存服务、视频压缩以及加速功能。
进一步地，如果第一消息中还包括的UE ID，PCRF根据UE ID关联到UE的上下文，向SPR查询UE的签约数据发现UE并没有权限使用内容过滤这项增值业务，那么PCRF在制定业务链策略时将考虑这个权限，将内容过滤排除在业务链策略之外。
可选的，在S303之后，该方法还可以包括：
S304、PCRF经由SCEF向AS发送第四消息，所述第四消息包括PCRF为所述业务流制定的业务链策略中所提供的业务链功能列表。
S305、AS经由SCEF接收PCRF发送的第四消息。
S304是对上述方法步骤的补充，目的是将业务链策略的制定结果通知AS，特别的，在PCRF实际制定的业务链策略和业务链需求不完全一致时有益效果明显，因为AS能够获知它的需求未完全被满足，此时，根据第四消息，AS可以决定同意这种业务链策略，或者采取措施协调尝试修改业务链策略。
S303中PCRF所制定的业务链策略可以对应一份业务链功能列表，该业务链功能列表中包括业务链策略所使用的业务链功能，也即S304第四消息中所指的PCRF为所述业务流制定的业务链策略中所提供的业务链功能列表。
可选的，第四消息中还包括步骤S304中业务链功能列表中对应的业务功能使能单元相关的计费信息。
可选的，第四消息包括业务链策略的标识，以便后续在业务建立过程中对业务链策略进行认证。
现简单描述一个为UE建立业务的完整流程，在PCRF制定业务链策略后，PCRF可以将业务链策略经由流分类器下发至策略和计费执行功能(PCEF，policy and charging enforcement function)单元，以供PCEF执行所述业务链策略。
PCEF经由流分类器向PCRF反馈策略接收响应。
PCRF经由SCEF向AS发送业务建立成功的消息。
至此，业务流对应的业务建立成功，可以开始相应业务流的传输。
在S301、S302以及S301和S302之间，在本发明实施例方法具体实现时，可以包括以下具体步骤：SCEF收到AS发送的第一消息之后，对AS的第一消息进行鉴权，以确定AS执行此次操作的合法性，在SCEF确认AS此次执行的操作为合法时，SCEF将所述第一消息中包含的信息发送给PCRF。可选的，当第一消息中包含APN时，SCEF可以根据第一消息中的APN来选择转发至的PCRF。具体的，当第一消息承载在API请求中时，SCEF可以将API请求通过直径(Diameter)协议转换为Diameter消息发送给PCRF，且该Diameter消息中包括该第一消息中所包含的信息。
本发明实施例提供的技术方案，在用户需要进行某业务时，PCRF根据AS发送的包含该业务所对应的业务流需求的消息制定出适合该业务流的业务链策略，与现有技术中用户在附着到网络时、尚未明确具体执行何种业务之前就制定业务链策略相比，该业务链策略的制定方式更加灵活，从而更加准确、高效的业务链规则得以制定。同时，现有技术中，由于运营商与大量的第三方服务提供商签约获得实时更新的签约数据成本很大，导致即便第三方在运营商网关和外部网络之间能够部署属于自身的业务功能使能单元，PCRF也无法获知第三方服务提供商部署的业务功能使能单元的具体功能信息，从而无法将其包含在业务链策略中提供给AS。而采用了本发明的技术方案，AS只要在业务链需求中指明希望获得特定第三方服务提供商提供的业务链功能，PCRF即便不知道该业务链功能是什么也能够将其制定在业务链策略中提供给AS。因此本发明技术方案为UE业务的业务流使用第三方服务提供商提供的业务链功能提供了一种低成本的实现方式。
图4为本发明实施例提供的另一种业务链策略制定方法的流程图。该方法是在图3所示的方法的基础上执行的，在S301之前，该方法包括：
S401、AS经由SCEF向PCRF发送第二消息，所述第二消息用于为所述业务流请求查询网络中的业务链功能。
S402、PCRF经由SCEF接收AS发送的第二消息。
S403、PCRF根据所述第二消息，确定PCRF能够提供给所述AS的业务链功能列表。
S404、PCRF经由SCEF向AS发送第三消息，所述第三消息包括所述PCRF能够提供给AS的业务链功能列表。
S405、AS经由SCEF接收PCRF发送的第三消息。
S406、AS根据所述第三消息中包括的所述PCRF能够提供给AS的业务链功能列表，确定所述业务流的业务链需求。
AS除了从UE处取得需要执行的业务对应的业务流的属性之外，如果能提前获知PCRF能够提供给AS的业务链功能列表，显然AS据此可以提出更合理的业务链需求，避免将PCRF不能提供的业务链功能纳入业务链需求当中。因此，在执行S301之前，便可以执行本发明实施例提供的步骤：
AS经由SCEF向PCRF发送第二消息，所述第二消息，用于为所述业务流请求查询网络中运营商网关和外部网络之间部署了哪些业务功能使能单元。
与S301中的第一消息相类似，AS发送的第二消息可以承载在API请求中。S403中，PCRF根据第二消息把网络中部署的所有的业务链功能形成业务链功能列表，并通过S404中的第三消息返回给AS。
可选的，第二消息可以包括UE ID、业务流的application ID、APN以及媒体类型中的至少一种。如，若第二消息中包含了UE ID，那么PCRF就能够根据UE ID关联到UE的上下文，向用户属性存储器(SPR，subscription profile repository)查询UE的签约数据。根据签约数据，PCRF获知了能够为UE提供的业务链功能，那么PCRF就将能够为UE提供的业务链功能形成业务链功能列表提供给AS。又如，若第一消息中包含了application ID，这个application ID对应了当前业务流的属性，那么PCRF就能够主动的为业务流筛选适合于该业务流的业务链功能，并将社和与该业务流的业务链功能形成业务链功能列表提供给AS。若第一消息中包含APN或者媒体类型，那么它们的功能和目的与UE ID、application ID类似，在网络所有能够提供给AS的业务链功能的基础上，结合UE或者业务流具体的情况，缩小能够提供给AS的业务链功能，提供更具参考价值的功能列表给AS，以便AS提出更加合理的业务链需求。
当第二消息中包含了UE ID、业务流的应用标识、APN以及媒体类 型中的至少两种时，PCRF可以获得分别对应于该至少两种信息的能够为UE或者UE的业务流提供的业务链功能，在将它们取交集的基础上形成业务链功能列表提供给AS。
可选的，如果服务提供商在网络中部署了自身的业务功能使能单元，那么第二消息中可以包括指示属于服务提供商的业务功能使能单元对应的业务链功能的信息。这样，在S403中PCRF确定能够提供给AS的业务链功能列表时，就可以将服务提供商的业务功能使能单元对应的业务链功能纳入其中。
举例来说，考虑这样一种场景，运营商部署的业务功能使能单元可以支持的增值业务有：内容过滤、缓存服务以及防火墙，服务提供商在业务链中也部署了业务功能使能单元，该服务提供商部署的业务功能使能单元支持加速功能。那么PCRF提供给AS的业务链功能列表中就可以包括内容过滤、缓存服务、防火墙和加速功能，以供AS根据业务流的特性进行选择，确定业务链需求。当然，如果UE签约数据中未提供内容过滤的服务，那么PCRF提供给AS的业务链功能列表中可能就只有缓存服务、防火墙和加速功能。
S406中，当AS通过第三消息获得了网络能够提供给AS的业务链功能后，AS根据UE的业务流的属性，在网络能够为提供给AS的业务链功能中选择实际需要为业务流提供的业务链功能，作为业务链需求。
本发明实施例提供的技术方案，AS根据获得的PCRF能够提供的业务链功能列表，按需选择所需的业务链功能，使得业务链需求可以更合理，进而网络侧可以更好地为业务提供优化服务。
可选的，图4所示的方法S401-S405也可以独立于图3所示的方法实施列：在执行完步骤S405之后，停止执行后续步骤。
当UE需要执行某项业务时，可以触发AS向PCRF查询网络中的业务链功能，在获得PCRF能够提供给所述AS的业务链功能列表后，AS可以根据实际需要执行其它的功能步骤，因此这里不做限定。
图5为本发明实施例提供的另一种业务链策略制定方法的交互流程图。该方法是图3和图4所示的方法更为具体的实现步骤，交互过程中涉及具体的消息传递形式，并且在AS请求为业务流制定业务链策略之前， AS还请求查询网络中部署的业务链功能。如图5所示，该方法包括：
S501、AS向SCEF发送第一API请求，用于为业务流请求查询网络中的业务链功能。
第一API请求中可以包括UE ID、application ID、APN、媒体类型等信息，当网络中部署了服务提供商的业务使能单元时，还可以包括指示属于服务提供商的业务功能使能单元的信息。
S502、SCEF对第一API请求进行鉴权。
鉴权成功后：
S503、SCEF将第一API请求转换成Diameter协议的第一请求发送给PCRF。
其中，Diameter协议的第一请求中所包含的信息和第一API请求相同。
当Diameter协议的第一请求中包含UE ID时，执行S504，否则执行S505。
S504、PCRF根据UE ID关联到用户上下文，并根据UE ID获取UE的签约数据。
S505、PCRF确定网络能够为该业务流提供的第一业务链功能列表。
如果执行了S504,那么PCRF需要根据获取到的UE签约数据确定网络能够为该业务流提供的业务链功能。
S506、PCRF向SCEF发送第一请求响应，第一请求响应中包含网络能够为该业务流提供的第一业务链功能列表。
S507、SCEF向AS发送第一API响应，第一API响应包括第一业务链功能列表。
S508、AS根据第一业务链功能列表，结合业务流的属性，确定业务流的业务链需求。
S509、AS向SCEF发送第二API请求，用于请求请求为业务流制定业务链策略。
第二API请求中包括AS所确定的业务流的业务链需求。
S510、SCEF对第二API请求进行鉴权。
鉴权成功后：
S511、SCEF将第二API请求转换成Diameter协议下的第二请求发送给PCRF。
其中，Diameter协议的第二请求中所包含的信息和第二API请求相同。
S512、PCRF根据AS所确定的业务流的业务链需求为业务流制定业务链策略。
业务链策略可以是独立制定的，也可以与PCC策略中的其它策略一起制定。
S513、PCRF将业务链策略下发至流分类器。
S514、流分类器将业务链策略下发至PCEF。
S515、PCEF向流分类器反馈业务链策略第一接受响应。
S516、流分类器向PCRF反馈业务链策略第二接受响应。
S517、PCRF向SCEF发送第二请求响应，用于指示业务链策略制定成功。
S518、SCEF向AS发送第二API响应，用于指示业务链策略制定成功。
本发明实施例提供的技术方案，AS向网络侧请求查询网络中的业务链功能，并由PCRF返回业务链功能列表，AS根据获得的业务链功能列表，按需选择所需的业务链功能，使得业务链策略可以更精确、高效地被制定，进而网络侧可以更好地为业务提供优化服务。
图6为本发明实施例提供的一种业务建立的方法的交互流程图。该方法是图3和图4所示的方法更为具体的实现步骤，交互过程中涉及具体的消息传递形式。如图6示，该方法包括：
S601、AS向SCEF发送第三API请求，用于请求为业务流制定业务链策略。
第三API请求中包括业务流的业务链需求，还可以包括UE ID、application ID、APN、媒体类型等，当网络中部署了服务提供商的业务使能单元时，还包括指示属于服务提供商的业务功能使能单元的信息。
S602、SCEF对第三API请求进行鉴权。
鉴权成功后：
S603、SCEF将第三API请求转换成Diameter协议下的第三请求发送给PCRF。
其中，Diameter协议的第三请求中所包含的信息和第三API请求相同。
当Diameter协议的第一请求中包含UE ID时，执行S604，否则执行S605。
S604、PCRF根据UE ID关联到用户上下文，并根据UE ID获取用户的签约数据。
S605、PCRF根据Diameter协议下的第三请求中所包含的业务链需求为该业务流制定业务链策略。
如果执行了S604,那么PCRF需要同时根据获取到的UE签约数据为该业务流制定业务链策略。
S606、PCRF向SCEF发送第三请求响应，第三请求响应包括业务链策略中包含的业务链功能形成第二业务链功能列表。
其中，还包含了业务链策略标识。
S607、SCEF向AS发送第三API响应，第三API响应包括第二业务链功能列表。
S608、AS向SCEF发送第四API请求，用于请求建立业务流对应的业务。
第四API请求中包括业务链策略标识。
S609、SCEF对第四API请求进行鉴权。
鉴权成功后：
S610、SCEF将第四API请求转换成Diameter协议的第四请求发送给PCRF。
其中，Diameter协议的第四请求中包括业务链策略标识。
S611、PCRF确定业务链策略标识对应的业务链策略为PCRF之前为该业务流制定的业务链策略。
S612、PCRF将业务链策略标识对应的业务链策略下发至流分类器。
S613、流分类器将业务链策略下发至PCEF。
S614、PCEF向流分类器反馈业务链策略第三接受响应。
S615、流分类器向PCRF反馈业务链策略第四接受响应。
S616、PCRF向SCEF发送第四请求响应，用于指示业务流对应的业务建立成功。
S617、SCEF向AS发送第四API响应，用于指示业务流的业务建立成功。
S618、AS发起上行数据的传输。
本发明实施例提供的技术方案，AS向PCRF请求制定业务链策略，请求中包含业务链需求，并由PCRF根据业务链需求直接制定业务链策略。在业务建立流程中，PCRF根据之前为AS制定的业务链策略建立业务。本发明技术方案使得业务链策略可以更精确、高效地被制定，进而网络侧可以更好地为业务提供优化服务。
为了实现图3至图6所示的方法实施例提供的技术方案，本发明实施例还提供了一种PCRF700，以及一种AS800，如图7所示，为一种PCRF700的结构示意图。如图8所示，为一种AS800的结构示意图。
PCRF700包括：
接收单元710，用于经由SCEF接收AS发送的第一消息，所述第一消息用于请求为用户设备UE的业务流制定业务链策略，所述第一消息包括所述业务流的业务链需求；
处理单元720，用于根据所述第一消息中包括的所述业务流的业务链需求，为所述业务流制定业务链策略，所述业务链策略包括为所述业务流提供的业务链功能。
AS800包括：
处理单元810，用于确定需要为用户设备UE的业务流制定业务链策略；
发送单元820，用于经由SCEF向PCRF发送第一消息，所述第一消息用于请求为所述业务流制定业务链策略，所述第一消息包括所述业务流的业务链需求，以指示所述PCRF根据所述第一消息为所述业务流制定业务链策略。
在网络附着成功后的UE，有业务需要被执行时，UE可以通过发送指示的方式，触发AS800的发送单元820发送第一消息，用于请求为业务流制定业务链策略。其中，该业务流对应了UE的业务，该业务流即为执行所述业务时需要从源到目的进行传输的分组流。当然，AS也能够通过自身的分析，得出UE存在需要执行的业务流，确定需要为业务流制定业务链策略，从而主动发送第一消息。
AS800发送的第一消息可以承载在API请求中，第一消息中包括的业务流的业务链需求可以是防火墙、视频压缩、加速等增值业务中的至少一种。相应的，PCRF700的处理单元720根据业务链需求，为业务流制定业务链策略，其中为所述业务流提供的业务链功能指的是为业务流提供的增值业务，也即业务流流经的业务功能使能单元。
进一步的，该第一消息除了包括业务流的业务链需求外，根据具体的场景需求，还可以包括UE ID、业务流的application ID、APN以及媒体类型中的至少一种。如，若第一消息中包含了UE ID，那么PCRF700的处理单元720就能够根据UE ID关联到UE的上下文，向用SPR查询UE的签约数据。根据签约数据，PCRF700获知了能够为UE提供的业务链功能，结合第一消息中UE提出的业务链需求，PCRF700为业务流制定业务链策略，业务链策略可以包括：业务链需求中的业务链功能和能够为UE提供的业务链功能的交集所对应的业务链功能。又如，若第一消息中包含了application ID，这个application ID对应了当前业务流的属性，那么PCRF700的处理单元710就能够主动的为业务流筛选适合于该业务流的业务链功能，在此基础上结合第一消息中UE提出的业务链需求，PCRF700的处理单元720为业务流制定业务链策略，业务链策略可以包括：业务链需求中的业务链功能和能够为业务流提供的业务链功能的交集所对应的业务链功能。若第一消息中包含APN或者媒体类型，那么他们的功能和目的与UE ID、application ID类似，通过缩小业务链功能选择范围来为业务流制定更准确的业务链策略。
当第一消息中包含了UE ID、业务流的应用标识、APN以及媒体类型中的至少两种时，可以理解的是，在PCRF700的处理单元720为业务流制定业务链策略时，PCRF可以在结合业务链需求和至少两种根据第一消息中包含的信息获知的能够为UE或者UE的业务流提供的业务链功能的基础之上，制定 业务链策略，业务链策略可以包括：以上对应的至少三部分的业务链功能的交集功能。
可选的，如果服务提供商在网络中部署了自身的业务功能使能单元，那么业务链需求中可以包括属于服务提供商的业务功能使能单元对应的业务链功能。这样，PCRF700的处理单元在制定业务链策略时，就能够考虑将服务提供商的业务功能使能单元对应的业务链功能纳入其中。
可选的，PCRF700还包括发送单元730，用于在处理单元720为所述业务流制定业务链策略之后，经由所述SCEF向所述AS发送第四消息，所述第四消息包括PCRF为所述业务流制定的业务链策略中所提供的业务链功能列表；
AS800还包括接收单元830，用于经由SCEF接收PCRF发送的第四消息。
PCRF700发送单元730将业务链策略的制定结果通知AS800，特别的，在PCRF700实际制定的业务链策略和业务链需求不完全一致时有益效果明显，因为AS800能够获知它的需求未完全被满足，此时，根据第四消息，AS800可以决定同意这种业务链策略，或者采取措施协调尝试修改业务链策略。
PCRF所制定的业务链策略可以对应一份业务链功能列表，该业务链功能列表中包括业务链策略所使用的业务链功能，也即第四消息中所指的PCRF为所述业务流制定的业务链策略中所提供的业务链功能列表。
可选的，第四消息中还包括为所述业务流制定的业务链策略中所提供的业务链功能列表中对应的业务功能使能单元相关的计费信息。
可选的，第四消息包括业务链策略的标识，以便后续在业务建立过程中对业务链策略进行认证。
本发明实施例提供的技术方案，在用户需要进行某业务时，PCRF根据AS发送的包含该业务所对应的业务流需求的消息制定出适合该业务流的业务链策略，与现有技术中用户在附着到网络时、尚未明确具体执行何种业务之前就制定业务链策略相比，该业务链策略的制定方式更加灵活，从而更加准确、高效的业务链规则得以制定。同时，现有技术中，由于运营商与大量的第三方服务提供商签约获得实时更新的签约数据成本很大，导致即便第三方在运营商网关和外部网络之间能够部署属于自身的业务功能使能单元，PCRF也无法获知第三方服务提供商部署的业务功能使能单元的具体功能信息，从而无法将其包含在业务链策略中提供给AS。而采用了本发明的技术方案，AS只要在业 务链需求中指明希望获得特定第三方服务提供商提供的业务链功能，PCRF即便不知道该业务链功能是什么也能够将其制定在业务链策略中提供给AS。因此本发明技术方案为UE业务的业务流使用第三方服务提供商提供的业务链功能提供了一种低成本的实现方式。
可选的，AS800的发送单元820还用于，经由所述SCEF向所述PCRF发送第一消息之前，经由SCEF向PCRF发送第二消息，所述第二消息用于为所述业务流请求查询网络中的业务链功能。
PCRF700的接收单元710还用于，在经由SCEF接收AS发送的第一消息之前，经由所述SCEF接收所述AS发送的第二消息。
PCRF700的处理单元720还用于，根据所述第二消息，确定所述PCRF能够提供给所述AS的业务链功能列表。
PCRF700的发送单元730还用于，经由所述SCEF向所述AS发送第三消息，所述第三消息包括所述PCRF700能够提供给所述AS800的业务链功能列表。
AS800的接收单元830还用于，经由所述SCEF接收所述PCRF700根据所述第二消息发送的第三消息。
AS800的处理单元820还用于，根据所述第三消息中包括的所述PCRF700能够提供给所述AS的业务链功能列表，确定所述业务流的业务链需求。
AS800除了从UE处取得需要执行的业务对应的业务流的属性之外，如果能提前获知PCRF700能够提供给AS800的业务链功能列表，显然AS800据此可以提出更合理的业务链需求，避免将PCRF700不能提供的业务链功能纳入业务链需求当中。
与第一消息类似，AS发送的第二消息可以承载在API请求中。PCRF700的处理单元720根据第二消息把网络中部署的所有的业务链功能形成业务链功能列表，并通过第三消息返回给AS800。
可选的，第二消息可以包括UE ID、业务流的application ID、APN以及媒体类型中的至少一种。
可选的，如果服务提供商在网络中部署了自身的业务功能使能单元，那么第二消息中可以包括指示属于服务提供商的业务功能使能单元对应的业务链功能的信息。这样PCRF700的处理单元720确定能够提供给AS 的业务链功能列表时，就可以将服务提供商的业务功能使能单元对应的业务链功能纳入其中。
当AS800通过第三消息获得了网络能够提供给AS的业务链功能后，AS800的处理单元810根据UE的业务流的属性，在网络能够为提供给AS800的业务链功能中选择实际需要为业务流提供的业务链功能，作为业务链需求。
本发明实施例提供的技术方案，AS根据获得的PCRF能够提供的业务链功能列表，按需选择所需的业务链功能，使得业务链需求可以更合理，进而网络侧可以更好地为业务提供优化服务。
可选的，以上AS800向PCRF700请求查询网络中的业务链功能可以独立于AS800请求PCRF700为业务流制定业务链策略的功能。也即，当UE需要执行某项业务时，可以触发AS800向PCRF700查询网络中的业务链功能，在获得PCRF700能够提供给所述AS800的业务链功能列表后，AS800可以根据实际需要执行其它的功能步骤，因此这里不做限定。
本发明实施例还提供了另一种PCRF900，以及另一种AS1000，如图9所示，为另一种PCRF900的结构示意图。如图10所示，为另一种AS1000的结构示意图。
如图9所示，PCRF1000包括处理器910、存储器920、通信接口930和总线940，所述存储器920存储执行指令，当所述设备运行时，所述处理器910与所述存储器920之间通过总线940通信，所述处理器910通过所述通信接口930接收以及发送信息，并根据存储器920存储的计算机指令执行本发明实施例图3至图6提供的方法实施例公开的方法的步骤。
如图10所示，AS 1000包括处理器1010、存储器1020、通信接口1030和总线1040，所述存储器1020存储执行指令，当所述设备运行时，所述处理器1010与所述存储器1020之间通过总线1040通信，所述处理器1010通过所述通信接口1030接收以及发送信息，并根据存储器1020存储的计算机指令执行本发明实施例图3至图6提供的方法实施例公开的方法的步骤。
本发明实施例提供的技术方案，在用户需要进行某业务时，PCRF根据AS发送的包含该业务所对应的业务流需求的消息制定出适合该业务 流的业务链策略，与现有技术中用户在附着到网络时、尚未明确具体执行何种业务之前就制定业务链策略相比，该业务链策略的制定方式更加灵活，从而更加准确、高效的业务链规则得以制定。
其中，图9和图10所述的处理器可以是通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。计算机指令可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成各实施例的方法的步骤。
本领域普通技术人员可以理解并实现上述各实施例中的全部流程。其都可以通过计算机程序指令配合相关的硬件实现。
在本发明实施例提供的方案中，所述“第一”“第二”“第三”“第四”等等仅表示区分不同的对象，如不同的消息，不同的业务链功能列表，而本身并不具有实质性的限定。
以上各实施例中应用场景等的限定仅用以说明本发明的具体技术方案，而非对其进行限制。也即其可以对前述各实施例所记载的技术方案进行修改，或者对其中的技术特征进行等同替换，而这些修改和替换，并不影响其落入本发明的保护范围。

Claims (28)

  1. 一种业务链策略的制定方法，其特征在于，所述方法包括：
    策略与计费规则功能单元PCRF经由服务能力开放功能单元SCEF接收应用服务器AS发送的第一消息，所述第一消息用于请求为用户设备UE的业务流制定业务链策略，所述第一消息包括所述业务流的业务链需求；
    所述PCRF根据所述第一消息中包括的所述业务流的业务链需求，为所述业务流制定业务链策略，所述业务链策略包括为所述业务流提供的业务链功能。
  2. 如权利要求1所述的方法，其特征在于，在所述PCRF经由SCEF接收AS发送的第一消息之前，所述方法还包括：
    所述PCRF经由所述SCEF接收所述AS发送的第二消息，所述第二消息用于为所述业务流请求查询网络中的业务链功能；
    所述PCRF根据所述第二消息，确定所述PCRF能够提供给所述AS的第一业务链功能列表；
    所述PCRF经由所述SCEF向所述AS发送第三消息，所述第三消息包括所述第一业务链功能列表，所述业务链需求根据所述第一业务链功能列表确定。
  3. 如权利要求1或者2所述的方法，其特征在于，所述第一消息包括所述UE的用户标识、所述业务流的应用标识、接入点名称以及所述业务流的媒体类型中的至少一种；
    所述第一消息包括所述UE的用户标识时，所述方法进一步包括：所述PCRF确定网络能够为所述UE提供的业务链功能；
    所述PCRF为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为所述UE提供的业务链功能制定所述业务链策略；
    所述业务链策略包括：所述业务链需求中的业务链功能和能够为所述UE提供的业务链功能的交集所对应的业务链功能；
    或者，所述第一消息包括所述业务流的应用标识时，所述方法进一步包括：所述PCRF确定网络能够为所述业务流提供的业务链功能；
    所述PCRF为所述业务流制定业务链策略，包括：根据所述业务链需 求及所述网络能够为所述业务流提供的业务链功能制定所述业务链策略；
    所述业务链策略包括：所述业务链需求中的业务链功能和能够为所述业务流提供的业务链功能的交集所对应的业务链功能；
    或者，所述第一消息包括所述接入点名称时，所述方法进一步包括：所述PCRF确定网络能够为流经所述接入点的所述业务流提供的业务链功能；
    所述所述PCRF为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为流经所述接入点的所述业务流提供的业务链功能制定所述业务链策略；
    所述业务链策略包括：所述业务链需求中的业务链功能和能够为流经所述接入点的所述业务流提供的业务链功能的交集所对应的业务链功能；
    或者，所述第一消息包括所述业务流的媒体类型时，所述方法进一步包括：所述PCRF根据所述媒体类型确定网络能够为所述业务流提供的业务链功能；
    所述PCRF为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为所述业务流提供的业务链功能制定所述业务链策略；
    所述业务链策略包括：所述业务链需求中的业务链功能和能够为所述业务流提供的业务链功能的交集所对应的业务链功能。
  4. 如权利要求2或者3所述的方法，其特征在于，所述第二消息包括所述UE用户标识、所述业务流的应用标识、接入点名称以及所述业务流的媒体类型中的至少一种；
    所述第二消息包括所述UE的用户标识时，所述第一业务链功能列表包括：所述网络能够为所述UE提供的业务链功能；
    或者，所述第二消息包括所述业务流的应用标识时，所述第一业务链功能列表包括：所述网络能够为所述业务流提供的业务链功能；
    或者，所述第二消息包括所述接入点名称时，所述第一业务链功能列表包括：所述网络能够为流经所述接入点的所述业务流提供的业务链功能；
    或者，所述第二消息包括所述业务流的媒体类型时，所述第一业务链功能列表包括：所述网络能够为对应所述媒体类型的所述业务流提供的业 务链功能。
  5. 如权利要求1-4任一所述的方法，其特征在于，
    所述业务链策略对应有第二业务链功能列表，所述第二业务链功能列表中包括所述业务链策略所使用的业务链功能；
    在所述PCRF为所述业务流制定业务链策略之后，所述方法还包括：
    所述PCRF经由所述SCEF向所述AS发送第四消息，所述第四消息包括所述第二业务链功能列表。
  6. 如权利要求1-5任一所述的方法，其特征在于，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述业务链需求包括所述服务提供商部署的业务功能使能单元对应的业务链功能时，所述业务链策略包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
  7. 如权利要求2-6任一所述的方法，其特征在于，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述第二消息包括指示所述服务提供商部署的业务功能使能单元的信息时，所述第一业务链功能列表中包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
  8. 一种业务链策略的制定方法，其特征在于，所述方法包括：
    应用服务器AS确定需要为用户设备UE的业务流制定业务链策略；
    所述AS经由服务能力开放功能单元SCEF向计费规则功能单元PCRF发送第一消息，所述第一消息用于请求为所述业务流制定业务链策略，所述第一消息包括所述业务流的业务链需求，以指示所述PCRF根据所述第一消息为所述业务流制定业务链策略。
  9. 如权利要求8所述的方法，其特征在于，
    所述AS确定需要为业务流制定业务链策略，包括：
    根据从所述UE接收到的第五消息，确定需要为业务流制定业务链策略，所述第五消息用于触发所述AS向所述PCRF请求为所述业务流制定业务链策略；
    或者，包括：
    通过分析得出所述UE存在需要执行的业务流，来确定需要为业务流制定业务链策略。
  10. 如权利要求8或者9所述的方法，其特征在于，在所述AS经由所述SCEF向所述PCRF发送第一消息之前，所述方法还包括：
    所述AS经由所述SCEF向所述PCRF发送第二消息，所述第二消息用于为所述业务流请求查询网络中的业务链功能；
    所述AS经由所述SCEF接收所述PCRF根据所述第二消息发送的第三消息，所述第三消息包括所述PCRF能够提供给所述AS的第一业务链功能列表；
    所述AS根据所述第三消息中包括的所述第一业务链功能列表，确定所述业务流的业务链需求。
  11. 如权利要求10所述的方法，其特征在于，所述第一消息或者第二消息包括用户标识、应用标识、接入点名称以及媒体类型中的至少一种。
  12. 如权利要求8-11任一所述的方法，其特征在于，所述方法还包括：
    所述AS经由所述SCEF接收所述PCRF发送的第四消息，所述第四消息包括第二业务链功能列表，所述第二业务链功能列表中包括所述业务链策略所使用的业务链功能。
  13. 如权利要求8-12任一所述的方法，其特征在于，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述业务链需求包括所述服务提供商部署的业务功能使能单元对应的业务链功能时，所述业务链策略包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
  14. 如权利要求10-13任一所述的方法，其特征在于，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述第二消息包括指示所述服务提供商部署的业务功能使能单元的信息时，所述第一业务链功能列表中包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
  15. 一种策略与计费规则功能单元PCRF，用于业务链策略的制定，其特征在于，所述PCRF包括：
    接收单元，用于经由服务能力开放功能单元SCEF接收应用服务器AS发送的第一消息，所述第一消息用于请求为用户设备UE的业务流制 定业务链策略，所述第一消息包括所述业务流的业务链需求；
    处理单元，用于根据所述第一消息中包括的所述业务流的业务链需求，为所述业务流制定业务链策略，所述业务链策略包括为所述业务流提供的业务链功能。
  16. 如权利要求15所述的PCRF，其特征在于,
    所述接收单元还用于，在经由SCEF接收AS发送的第一消息之前，经由所述SCEF接收所述AS发送的第二消息，所述第二消息用于为所述业务流请求查询网络中的业务链功能；
    所述处理单元还用于，根据所述第二消息，确定所述PCRF能够提供给所述AS的第一业务链功能列表；
    所述PCRF还包括：
    发送单元，用于经由所述SCEF向所述AS发送第三消息，所述第三消息包括所述第一业务链功能列表，所述业务链需求根据所述第一业务链功能列表确定。
  17. 如权利要求15或者16所述的PCRF，其特征在于，所述第一消息包括所述UE的用户标识、所述业务流的应用标识、接入点名称以及所述业务流的媒体类型中的至少一种；
    所述第一消息包括所述UE的用户标识时，所述处理单元还用于，确定网络能够为所述UE提供的业务链功能；
    所述处理单元为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为所述UE提供的业务链功能制定所述业务链策略；
    所述业务链策略包括：所述业务链需求中的业务链功能和能够为所述UE提供的业务链功能的交集功能；
    或者，所述第一消息包括所述业务流的应用标识时，所述处理单元还用于，确定网络能够为所述业务流提供的业务链功能；
    所述处理单元为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为所述业务流提供的业务链功能制定所述业务链策略；
    所述业务链策略包括：所述业务链需求中的业务链功能和能够为所述业务流提供的业务链功能的交集功能；
    或者，所述第一消息包括所述接入点名称时，所述处理单元还用于，确定网络能够为流经所述接入点的所述业务流提供的业务链功能；
    所述处理单元为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为流经所述接入点的所述业务流提供的业务链功能制定所述业务链策略；
    所述业务链策略包括：所述业务链需求中的业务链功能和能够为流经所述接入点的所述业务流提供的业务链功能的交集功能；
    或者，所述第一消息包括所述业务流的媒体类型时，所述处理单元还用于根据所述媒体类型确定网络能够为所述业务流提供的业务链功能；
    所述处理单元为所述业务流制定业务链策略，包括：根据所述业务链需求及所述网络能够为所述业务流提供的业务链功能制定所述业务链策略；
    所述业务链策略包括：所述业务链需求中的业务链功能和能够为所述业务流提供的业务链功能的交集功能。
  18. 如权利要求16或者17所述的PCRF，其特征在于，所述第二消息包括所述UE用户标识、所述业务流的应用标识、接入点名称以及所述业务流的媒体类型中的至少一种；
    所述第二消息包括所述UE的用户标识时，所述第一业务链功能列表包括：所述网络能够为所述UE提供的业务链功能；
    或者，所述第二消息包括所述业务流的应用标识时，所述第一业务链功能列表包括：所述网络能够为所述业务流提供的业务链功能；
    或者，所述第二消息包括所述接入点名称时，所述第一业务链功能列表包括：所述网络能够为流经所述接入点的所述业务流提供的业务链功能；
    或者，所述第二消息包括所述业务流的媒体类型时，所述第一业务链功能列表包括：所述网络能够为对应所述媒体类型的所述业务流提供的业务链功能。
  19. 如权利要求15-18任一所述的PCRF，其特征在于，
    所述业务链策略对应有第二业务链功能列表，所述第二业务链功能列表中包括所述业务链策略所使用的业务链功能；
    所述发送单元还用于，在所述处理单元为所述业务流制定业务链策略之后，经由所述SCEF向所述AS发送第四消息，所述第四消息包括所述第二业务链功能列表。
  20. 如权利要求15-19任一所述的PCRF，其特征在于，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述业务链需求包括所述服务提供商部署的业务功能使能单元对应的业务链功能时，所述业务链策略包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
  21. 如权利要求16-20任一所述的PCRF，其特征在于，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述第二消息包括指示所述服务提供商部署的业务功能使能单元的信息时，所述第一业务链功能列表中包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
  22. 一种应用服务器AS，用于业务链策略的制定，其特征在于，所述AS包括：
    处理单元，用于确定需要为用户设备UE的业务流制定业务链策略；
    发送单元，用于经由服务能力开放功能单元SCEF向计费规则功能单元PCRF发送第一消息，所述第一消息用于请求为所述业务流制定业务链策略，所述第一消息包括所述业务流的业务链需求，以指示所述PCRF根据所述第一消息为所述业务流制定业务链策略。
  23. 如权利要求22所述的AS，其特征在于，
    所述处理单元确定需要为业务流制定业务链策略，包括：
    通过分析得出所述UE存在需要执行的业务流，来确定需要为业务流制定业务链策略；
    或者，所述AS进一步包括：
    接收单元，用于接收所述UE发送的第五消息；
    相应地，所述处理单元确定需要为业务流制定业务链策略，包括：
    根据所述接收单元接收的所述第五消息，确定需要为业务流制定业务链策略，所述第五消息用于触发所述AS向所述PCRF请求为所述业务流制定业务链策略。
  24. 如权利要求22或者23所述的AS，其特征在于，
    所述发送单元还用于，经由所述SCEF向所述PCRF发送第一消息之前，经由所述SCEF向所述PCRF发送第二消息，所述第二消息用于为所述业务流请求查询网络中的业务链功能；
    所述接收单元用于，经由所述SCEF接收所述PCRF根据所述第二消息发送的第三消息，所述第三消息包括所述PCRF能够提供给所述AS的第一业务链功能列表；
    所述处理单元还用于，根据所述第三消息中包括的所述第一业务链功能列表，确定所述业务流的业务链需求。
  25. 如权利要求24所述的AS，其特征在于，所述第一消息或者第二消息包括用户标识、应用标识、接入点名称以及媒体类型中的至少一种。
  26. 如权利要求22-25任一所述的方法，其特征在于，
    所述接收单元还用于，经由所述SCEF接收所述PCRF发送的第四消息，所述第四消息包括第二业务链功能列表，所述第二业务链功能列表中包括所述业务链策略所使用的业务链功能。
  27. 如权利要求22-26任一所述的AS，其特征在于，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述业务链需求包括所述服务提供商部署的业务功能使能单元对应的业务链功能时，所述业务链策略包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
  28. 如权利要求24-27任一所述的AS，其特征在于，当服务提供商在所述网络的业务链中部署了业务功能使能单元，并且所述第二消息包括指示所述服务提供商部署的业务功能使能单元的信息时，所述第一业务链功能列表中包括所述服务提供商部署的业务功能使能单元对应的业务链功能。
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