WO2014032536A1 - Cdn与网络融合的业务控制方法及业务控制设备 - Google Patents

Cdn与网络融合的业务控制方法及业务控制设备 Download PDF

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Publication number
WO2014032536A1
WO2014032536A1 PCT/CN2013/081839 CN2013081839W WO2014032536A1 WO 2014032536 A1 WO2014032536 A1 WO 2014032536A1 CN 2013081839 W CN2013081839 W CN 2013081839W WO 2014032536 A1 WO2014032536 A1 WO 2014032536A1
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Prior art keywords
user
network
acceleration
content
quality assurance
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PCT/CN2013/081839
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English (en)
French (fr)
Inventor
黄孙亮
陈建业
范成法
李宏飚
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中兴通讯股份有限公司
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Publication of WO2014032536A1 publication Critical patent/WO2014032536A1/zh

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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
    • H04L67/535—Tracking the activity of the user
    • 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
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
    • H04L67/61—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources taking into account QoS or priority requirements

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a service policy control method and a service control device for a CDN (Content Delivery Network) and a network convergence.
  • CDN Content Delivery Network
  • BACKGROUND At present, applications on the Internet are becoming more and more abundant, and gradually develop toward data, voice, and video. In particular, online video services are developing very rapidly, and many video service providers have emerged, such as: y 0U tobe, Youku , potatoes and Sohu video.
  • video service providers have emerged, such as: y 0U tobe, Youku , potatoes and Sohu video.
  • the jitter, packet loss, and interruption of the network have a great impact on the video service quality, which seriously affects the user experience. For example, in the online video service, cards often exist.
  • the Internet is usually designed to be simplistic and high-performance. It corresponds to the seven-layer model of OSI.
  • the network focuses on the third layer and below.
  • the perception of the application is very weak, and it is difficult to guarantee the service quality of the application. It is based on users, specific content or specific network security policies implemented during specific time periods, and it is impossible to achieve refined management, control and operation.
  • Network providers are only responsible for providing network connectivity, not providing content services, and not being able to perceive specific content.
  • Content providers only provide content.
  • CDN service providers that provide CDN services to ICP/ISP, which can improve the quality and speed of content distribution to a certain extent, ensure the stability and reliability of content, and improve the user experience to a certain extent;
  • the system can only maintain the application layer link of the user.
  • the connection control of the network layer is controlled by the service control device of the service provider, which causes the CDN service provider to be unable to sense and control the basic network.
  • the quality of service provision is still severely limited by the basic network. The bandwidth and quality cannot guarantee the user experience fundamentally.
  • an embodiment of the present invention provides a service control method and a service control device for a CDN and a network, which are designed to improve the service provisioning and guarantee capability of the system and improve the user service experience.
  • an embodiment of the present invention provides a service control method for converging a CDN with a network, including: the service control device maintains a content usage status of the user after the user accesses the application; and according to the content usage status of the user and pre-negotiating The mechanism applies application policies and/or network policy controls to users.
  • the network component of the service control device receives the network access request initiated by the user; maintains the network state of the user by using the network state machine, and requests the network access of the user by using the AAA authentication system. Perform authentication; when the authentication is passed, allocate initial network resources to the user.
  • the step of maintaining the content usage status of the user includes: after the user accesses the application, and the application system redirects the user to the CDN component of the service control device, the CDN component is The user establishes an application link to provide the user with a corresponding CDN service service; the CDN component creates a content state machine for the user, and maintains the user's content usage status.
  • the step of applying the application policy and/or the network policy to the user according to the content usage status and the pre-negotiation mechanism of the user includes: determining, according to the previously negotiated policy, the user is content acceleration and quality assurance, network acceleration, and quality Guarantee, or double acceleration and quality assurance of the network and content; apply for the corresponding acceleration and quality assurance strategy according to the judgment result and the user's content usage status.
  • the step of applying for a content acceleration and quality assurance policy for a user according to a content usage status of the user includes: applying, by the CDN component, a content acceleration and quality assurance request or receiving a user content acceleration according to a pre-negotiated policy.
  • the step of applying for the network acceleration and quality assurance policy for the user according to the content usage status of the user includes: the CDN component according to the content usage status of the user, and initiating, by the internal interface of the service control device, the network component The network acceleration and quality assurance request of the user; the network component checks the network connection status of the user according to the network acceleration and quality assurance request of the user; if the network connection status of the user is correct, apply to the policy control system for the The user's network acceleration and quality assurance policy; otherwise, the user's network acceleration and quality assurance request is discarded; after the application is successful, the network component executes the network acceleration and quality assurance policy for the user delivered by the policy control system. .
  • the step of performing application policy and/or network policy control on the user according to the content usage status and the pre-negotiation mechanism of the user further includes: when the user application connection is interrupted or the user completes the application, the content acceleration and quality assurance of the user are revoked. Policy and/or user network acceleration and quality assurance strategies.
  • the embodiment of the present invention further provides a service control device for converging a CDN with a network, including: a state maintenance module, configured to maintain a content usage state of the user through a CDN component of the service control device after the user accesses the application; and the control module is set to The application policy and/or network policy control is performed on the user according to the content usage status and the pre-negotiation mechanism.
  • the service control device further includes: a receiving module, configured to receive a user-initiated network access request by using a network component of the service control device; and an authentication module configured to maintain the network state of the user through the network state machine, and pass the AAA authentication
  • the system authenticates the user's network access request. After the authentication is passed, the user is allocated initial network resources.
  • the state maintenance module includes: a link establishing unit, configured to establish an application link between the CDN component and the user after the user accesses the application, and the application system redirects the user to the CDN component of the service control device, The user provides a corresponding CDN service service; the state maintenance unit is configured to create a content state machine for the user through the CDN component, and maintain the content usage state of the user.
  • the control module includes: a determining unit, configured to determine, according to a previously negotiated policy, that the user is content acceleration and quality assurance, network acceleration and quality assurance, or network and content dual acceleration and quality assurance; It is set to apply for the corresponding acceleration and quality assurance policies for the user according to the judgment result and the content usage status of the user.
  • the operating unit comprises: a receiving unit, configured to apply for a content acceleration and quality assurance request or receive a content acceleration and quality assurance request of the user according to a pre-negotiated policy by the CDN component; determining an operation unit, setting In order to determine whether to accept the content acceleration and quality assurance request of the user according to the content usage status of the user and the resource status of the CDN system; if yes, perform content acceleration and guarantee for the user; otherwise, the content acceleration and quality assurance request of the user failure.
  • a receiving unit configured to apply for a content acceleration and quality assurance request or receive a content acceleration and quality assurance request of the user according to a pre-negotiated policy by the CDN component
  • determining an operation unit setting In order to determine whether to accept the content acceleration and quality assurance request of the user according to the content usage status of the user and the resource status of the CDN system; if yes, perform content acceleration and guarantee for the user; otherwise, the content acceleration and quality assurance request of the user failure.
  • the receiving unit is further configured to initiate, by the CDN component, a network acceleration and quality assurance request for the user according to the content usage status of the user to the network component;
  • the determining operation unit is further configured to pass the network
  • the component checks the network connection status of the user according to the network acceleration and quality assurance request of the user; if the network connection status of the user is correct, apply to the policy control system for the network acceleration and quality assurance policy for the user, otherwise, discard the The network acceleration and quality assurance policy for the user is performed by the network control unit after the application is successful.
  • the control module further includes: an undo unit, configured to revoke the user's content acceleration and security policy and/or the user's network acceleration and quality assurance policy when the user application connection is interrupted or the user completes the application.
  • the service control method and the service control device for the CDN and the network convergence proposed by the embodiment of the present invention form a service control device by integrating the CDN system with the network device, and through interaction and cooperation between the CDN component and the network component of the device, And the interaction between the device and the policy control system, and the targeted network acceleration and quality assurance policies and the content acceleration and quality assurance policies are implemented for a specific time period of the specific application content of the specific user;
  • the usage status of the user application content triggers the policy request, implementation, and revocation, thereby effectively improving the service provisioning and guarantee capability of the system, and greatly improving the user service experience.
  • FIG. 1 is a schematic flowchart of an embodiment of a service control method for a CDN and a network convergence according to the present invention
  • FIG. 2 is a schematic diagram of a service control device for a CDN and a network convergence according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of maintaining a user's content usage status according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of the application policy control of a user according to a content usage state and a pre-negotiation mechanism.
  • FIG. 5 is a schematic flowchart of another embodiment of a service control method for converging a CDN and a network according to another embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of an embodiment of a service control device for merging a CDN and a network according to the present invention
  • FIG. 7 is a schematic structural diagram of an acquisition module in an embodiment of a service control device for merging a CDN and a network according to the present invention
  • Structure of control module in an embodiment of service control device merging with network
  • Figure 8b is a block diagram representation of the operation unit of the present invention and network convergence CDN service control apparatus to an embodiment
  • FIG. 9 is a schematic structural diagram of the present invention and network convergence CDN service control apparatus according to another embodiment.
  • the solution of the embodiment of the present invention is mainly: integrating a CDN system with a network device to form a service control device, and interacting and coordinating between the CDN component and the network component of the device, and interaction between the device and the policy control system.
  • Targeted network acceleration and quality assurance policies and content acceleration and quality assurance policies can be implemented for specific user-specific application content within a specific time period; in addition, policy requests can be triggered according to the usage status of user application content. , implementation and revocation, to improve the system's service provision and support capabilities, and enhance the user's business experience. As shown in FIG.
  • an embodiment of the present invention provides a service control method for a CDN and a network convergence, including: Step S101: After a user accesses an application, the service control device maintains a content usage status of the user.
  • This embodiment uses a CDN system.
  • the basic idea of the CDN is to avoid the bottlenecks and links on the Internet that may affect the speed and stability of data transmission, so that the content transmission is faster and more stable.
  • CDN is a layer of intelligent overlay network based on the existing Internet based on the placement of node servers throughout the network. It can be based on network traffic and connection, load status and distance and response to users in real time. Comprehensive information such as time, directing the user's request to the service node closest to the user.
  • the service control device fuses the content distribution node of the CDN system with the network device as a CDN component of the service control device, and the network device serves as a network component of the service control device, thereby enabling the service control device to provide network services.
  • Capabilities can also provide CDN service capabilities. At the same time, it can effectively control the internal interaction primitives of the device through the service to realize effective linkage and information sharing between CDN components and network components, and improve service provision and support capabilities.
  • the CDN component in the service control device maintains the user content state machine and has corresponding control interface and network component interaction; the network component maintains the user network state machine, and has corresponding control interface and CDN component interaction, in addition, the network component has AAA Client features and more.
  • the network component maintains the network state of the user.
  • the CDN system specifies the corresponding CDN node device to provide the service according to the scheduling policy, and the CDN component maintains the user state.
  • the CDN system has its own management system GSLB system.
  • the user's request is directly redirected to the GSLB of the CDN system.
  • the GSLB specifies the CDN according to the user's location according to the user's location.
  • the service node that is, the CDN component of the service control device in this embodiment.
  • the application system may be a web application, a video application, or the like.
  • each user state machine is added to both the CDN component and the network component, and the state machines of the two are independent of each other, specifically adding a content state machine to the CDN component, managing the link state of the user, and uploading/downloading the network. State, etc.; Add a network state machine to the network component to maintain the user's network state.
  • an internal interface between the network component and the network component is added to the CDN component; the CDN component can trigger a corresponding network to the network component according to the user state information maintained by the user, according to the change of the user application state, that is, according to the content usage state of the user.
  • the policy request may also apply for or revoke the corresponding content acceleration policy according to the user's content usage status, obtain new policy information, or restore the user's business policy.
  • the content usage status of the user includes user resource usage, download opening and completion status, user link status, and the like.
  • Step S102 Perform application policy and/or network policy control on the user according to the content usage status and the pre-negotiation mechanism of the user.
  • the CDN component of the service control device maintains the content usage status of the user after the user accesses the application, and the CDN component can apply for the corresponding content acceleration and quality assurance policy according to the content usage status and the pre-negotiation mechanism, or according to the user's
  • the content usage status triggers the corresponding network acceleration and quality assurance policy request to the network component.
  • the CDN and the application system can pre-define the corresponding negotiation mechanism. In the negotiation mechanism, which users and which URLs need to be accelerated, and then sent to the CDN component in advance through the policy.
  • the CDN component can judge the user as content acceleration and quality assurance, network acceleration and quality assurance according to the prior negotiation strategy, for example, according to the attribute of the user and the URL accessed by the user. , or the dual acceleration and quality assurance of the network and content; apply for the corresponding acceleration and quality assurance strategies according to the judgment result and the user's content usage status. Therefore, the CDN component determines whether to accelerate the content of the user according to the policy negotiated with the application system, and if so, performs content acceleration and quality assurance for the user; otherwise, content acceleration and quality assurance are not performed for the user; It can be caused by insufficient resources of the system.
  • the CDN component itself judges according to the established policy, and if the content acceleration is required, the acceleration is performed; of course, the network component determines that the user application download rate is too slow, and may trigger the content acceleration and guarantee request to the CDN component. .
  • the network component After receiving the network acceleration and quality assurance policy request sent by the CDN component, the network component checks the corresponding user state according to the request message of the CDN component, and applies for the network acceleration and quality assurance policy based on the user to the policy control system.
  • the CDN component initiates a status according to a previously negotiated policy (such as whether the user is a member) and a user's content usage status (such as whether the user's application has obtained network acceleration and quality assurance), and initiates the network component through the internal interface of the service control device.
  • the network acceleration and quality assurance request for the user the network component checks the network connection status of the user according to the network acceleration and quality assurance request of the user, for example: checking whether the network status of the user is normal, or whether the user has dropped the line. If the network connection status of the user is correct, apply for a network acceleration and quality assurance policy for the user to the policy control system; when the application is successful, the policy control system delivers network acceleration and quality for the user to the network component. Protection strategy.
  • the foregoing step S101 may include: Step S1011: After the user accesses the application, and the application system redirects the user to the CDN component of the service control device, the CDN component establishes an application link with the user for the user.
  • the corresponding CDN service service is provided; when the user needs to access the application service after accessing the network, the application access request is sent to the application system.
  • the application system may be a web application, a video application, or the like.
  • the application system redirects the user to the CDN system, and the CDN system determines the CDN component that assigns the user to the corresponding service control device through a corresponding policy.
  • step S1012 the content state machine is created for the user by the CDN component, and the content usage state of the user is maintained.
  • the CDN component of the service control device provides the user with a CDN service service, and the user accesses the corresponding application.
  • the CDN component of the service control device creates a content state machine for the user and maintains the user content state.
  • the service control device where the CDN component is located serves as the maintenance user content state machine and the network state.
  • the master node of the machine is responsible for maintaining the user status. Other service nodes are only responsible for providing content and not maintaining user status. As shown in FIG.
  • Step S1021 The CDN component applies for a content acceleration and quality assurance request or receives a user's content acceleration and quality assurance request according to a pre-negotiated policy; and when determining whether to perform content acceleration and quality assurance, according to a predetermined Policies, user attributes, URLs, are applied directly within the CDN component; or can be judged based on content acceleration and quality assurance requests sent by the user.
  • Step S1022 Determine, according to the content usage status of the user and the resource status of the CDN system, whether to accept the content acceleration and quality assurance request of the user; if yes, proceed to step S1023; otherwise, proceed to step S1024; and step S1023, perform content for the user. Acceleration and quality assurance; Step S1024, determining that the user's content acceleration and quality assurance request fails.
  • the CDN component of the service control device applies for the content acceleration service according to the content acceleration and quality assurance request of the user, and the specific content acceleration mode may be determined according to the specific implementation of the CDN system; for different link modes and download modes. There may be different solutions.
  • the download method may be Http, FTP, P2SP, etc.; in specific implementation, the advantages of the CDN system and the P2SP technology may be combined to provide content acceleration; the combination of the CDN system and the P2P may enable the content.
  • the source is more controllable and more reliable.
  • it can also utilize the characteristics of P2SP to realize multi-point to one-point transmission, realize multiple content sources to be transmitted to users, fully guarantee the reliability of user content sources, and improve user download rate.
  • similar hierarchical services can be provided to provide more and better content source nodes for high-level users and provide higher download speeds. As shown in FIG.
  • the step of applying for the network acceleration and quality assurance policy for the user according to the content usage state in the foregoing step S102 includes: Step S1025: The CDN component is used according to the content usage status of the user, and passes through the internality of the service control device.
  • the interface initiates a network acceleration and quality assurance request for the user to the network component;
  • Step S1026 the network component checks the network connection status of the user according to the network acceleration and quality assurance request of the user; if the network connection status of the user is correct Applying the network acceleration and quality assurance policy for the user to the policy control system;
  • Step S1027 After the application is successful, the network component executes the network acceleration and quality assurance policy for the user delivered by the policy control system.
  • the CDN component initiates a network acceleration and quality assurance request for the user to the network component through the internal interface of the device.
  • the network component receives the user-based network acceleration and quality assurance request sent by the CDN component, checks the user status, including checking whether the user's network connection status is correct, and if the network connection is not detected, performing error processing; if the user status is correct, Then, based on the user applying for a network acceleration and quality assurance policy for the user to the policy control system.
  • the policy control system receives the network acceleration request, checks the online status and policy information of the user, and delivers a network acceleration and quality assurance policy for the user to the service control device.
  • the access network limits the rate of the user line is divided into the following two cases: In one case, the access network performs rate limiting on the user line. In this case, the network service control device needs to enhance user access through the ANCP protocol. Bandwidth; In another case, the access network does not rate the user. This situation only depends on the QoS guarantee policy deployed by the access network.
  • the user policy execution result of the network component is used to notify the CDN component through the internal interface of the device. Causes the CDN component to trigger the corresponding user content state machine migration.
  • the service control device also needs to feed back the success or failure message to the policy control system according to the result of the network policy implementation. Thus, through the acceleration and quality assurance of the network, the user experience is greatly improved.
  • the content acceleration and quality assurance policy control for the user shown in FIG. 3 and the network acceleration and quality assurance policy control for the user shown in FIG. 4 may be implemented separately according to actual conditions, or may be implemented simultaneously, that is, You can apply for content acceleration and quality assurance policies only for users, or apply for network acceleration and quality assurance policies only for users; or apply for content acceleration and quality assurance policies and network acceleration and quality assurance policies for users to achieve user content and network convergence. Guarantee.
  • You can apply for content acceleration and quality assurance strategies and network acceleration and quality assurance policies for users at the same time you can apply in sequential order or at the same time. In this case, the user can get the joint acceleration and quality guarantee of the content and the network, so that the user experience is greatly improved.
  • the CDN system After the user service is used, the CDN system will get the user's completion message (by closing the service link or other related messages).
  • the service control device may cancel the user's content acceleration and quality assurance policies and the user's network acceleration and quality assurance policies.
  • the user application completion message triggers the CDN component to revoke the content acceleration policy for the user, and releases the corresponding CDN system resource; and also triggers the CDN component to send a request to the network component to revoke the user's network acceleration and security policy;
  • the component receives a request from the CDN component to cancel the network acceleration and security policy based on the user, the user status is checked, and if an error occurs, error processing is performed; if the user state is correct, the user is requested to cancel the user based on the policy control system.
  • Network acceleration and quality assurance strategies are examples of the user application completion message.
  • the policy control system receives the message of canceling the network acceleration and security policy of the user, checks the online status and policy status of the user, and sends an instruction to the service control device to cancel the network acceleration and security policy of the user;
  • the service control device is completed by ANCP.
  • the user policy execution result of the network component notifies the CDN component through the device internal interface, so that the CDN component triggers the corresponding user content state machine migration.
  • the service control device feeds back the corresponding information to the policy control system according to the result of the policy execution.
  • the CDN component After the CDN component completes the policy revocation, the user's content state machine is closed, and the corresponding resources are released.
  • the CDN component can generate a corresponding charging record according to the user's status, the online situation, the downloaded content, the downloading time, the downloaded traffic, and the like, and can be transmitted to the charging system through the corresponding interface. It is also possible to interact with the network components through the internal interface, and then uniformly communicate with the charging system through the charging interface of the network component. In this embodiment, the network device and the CDN device are merged together, and the relative independence of the network component and the CDN component is maintained, and a loosely coupled fusion is formed.
  • the network component and the CDN component are added.
  • the internal interface and signaling of the interaction can effectively guarantee the content and network quality and enhance the user experience. In addition, it is simpler in specific deployments and reduces deployment and maintenance costs.
  • the internal interface enables the integration of network functions and CDN service functions to be more convenient and efficient, and has higher reliability.
  • the method further includes: Step S103, the network of the service control device The component receives the network access request initiated by the user.
  • Step S104 The network state machine maintains the network state of the user, and the network access request of the user is authenticated by the AAA authentication system.
  • Step S105 After the authentication is passed, the initial allocation is performed for the user. Internet resources.
  • the embodiment further includes a process of performing AAA authentication on the network before the user accesses the application. Specifically, when the user accesses the network, the user initiates a network access request to the service control device. After the service control device receives the network access request from the user, the network component maintains the user network status and initiates a user access request to the AAA authentication system. In the pre-authentication phase, the service control device needs to verify the access line of the user and the resource of the service control device.
  • the service admission control module checks the number of circuit sessions and the number of board sessions to determine whether the service control device processes the connection.
  • users obtain certain network resources, such as: PPPoE access mode; PPP links are established; IPoE access can obtain IP addresses, etc.; and the user's network status is maintained in the device, according to user access.
  • the information can be categorized and differentiated by the user for preliminary management; then the user requests authentication according to the corresponding configuration requirements.
  • the AAA authentication system authenticates the user. After the authentication is passed, the user authentication pass message is sent to the service control device, and the corresponding user initial network policy is sent. In the post-authentication phase, the user passes the AAA system authentication. As a legitimate user, more system resources can be obtained, and the corresponding network policies and permissions can be obtained for business use. At this stage, according to the authorization, it can also be divided into Multiple states, such as: restricted access, normal access, high priority protection, etc. It should be noted that, after the network is shut down, it needs to be triggered according to different events. The user's network state machine is shut down and the corresponding resources are released. The triggered event may be the normal offline request of the user, the abnormal drop detection result of the user, and the like.
  • the service control device receives the authentication pass message, triggers the user network state transition, and assigns the corresponding IP address to the user and applies the corresponding network policy; sends the user online charging packet to the AAA authentication system, notifying the AAA system that the user has started using the network service. , start billing.
  • the service control device sends the online package to the AAA system, notifying the AAA system that the user has started using the network service. , start billing.
  • the policy control system receives the online information of the user. After that, the user's online status and the user's current network policy status are maintained. In this way, the policy control system also obtains the correspondence between the user's IP address and the service control device address to which the user belongs.
  • the network access security authentication of the user is implemented through the foregoing solution.
  • the internal interaction of the network component and the CDN component occurs in the post-authentication phase, through the internally defined interface and signaling primitives.
  • the network component receives the network acceleration and security policy request from the CDN component for the user, it needs to check the network state machine of its own user. If the user does not exist, or the user does not belong to the post-authentication state, the error processing is performed;
  • the policy control system can be requested to request an acceleration and quality assurance policy, and the policy is controlled according to the policy, so that the user enters the network high priority security state.
  • the network component receives the network policy revocation message sent by the CDN component for the user, and also needs to check the user status. If it is not in the post-authentication state, it will perform error processing, if it belongs to the post-authentication state. Then, the policy control system is applied for revocation of the network policy, and the user network acceleration and quality assurance policies are revoked according to the instructions issued by the policy control system, and feedback to the CDN component is triggered through the internal interface, and the user content state machine migration is triggered. In addition, after the content acceleration and quality assurance request or network acceleration and guarantee request fails, the user can also start the corresponding timing waiting mechanism while maintaining the original state, and initiate the request again after a certain interval.
  • the network device and the CDN device are integrated together, so that the network system and the CDN system exist as components of the system device, and the device level is integrated; and the loosely coupled fusion mode is used to maintain the network state and content of the user.
  • the state is relatively independent and easier to deploy and extend.
  • a user content state machine is maintained in the CDN component to facilitate management control, billing, and operation based on user-based content usage.
  • the internal interaction interface between the CDN component and the network component is also added, so that the system can implement network security and content guarantee for a specific user, specific content, and specific time period based on the user service state, and satisfy the user.
  • an embodiment of the present invention provides a service control device for converging a CDN with a network, including: a state maintenance module 601 and a control module 602, where: the state maintenance module 601 is configured to maintain after the user accesses the application. The content usage status of the user; the control module 602 is configured to perform application policy and/or network policy control on the user according to the content usage status and the pre-negotiation mechanism.
  • the CDN system is integrated with the network device to form a service control device.
  • the basic idea of the CDN is to avoid the bottlenecks and links on the Internet that may affect the data transmission speed and stability, and make the content transmission faster and more stable.
  • CDN is a layer of intelligent overlay network based on existing Internet based on the placement of node servers throughout the network. It can be based on network traffic and connection and load status of each node and distance and response time to users. Such as comprehensive information, the user's request is directed to the service node closest to the user. The goal is to enable users to get the content they need, solve the problem of network congestion, and improve the response speed of users visiting the website.
  • the service control device fuses the content distribution node of the CDN system with the network device as a CDN component of the service control device, and the network device serves as a network component of the service control device, thereby enabling the service control device to provide network services. Capabilities can also provide CDN service capabilities. At the same time, it can effectively control the internal interaction primitives of the device through the service to realize effective linkage and information sharing between CDN components and network components, and improve service provision and support capabilities.
  • the CDN component in the service control device maintains the user content state machine and has corresponding control interface and network component interaction; the network component maintains the user network state machine, and has corresponding control interface and CDN component interaction, in addition, the network component has AAA Client features and more.
  • the network component maintains the network state of the user.
  • the CDN system specifies the corresponding CDN node device to provide the service according to the scheduling policy, and the CDN component maintains the user state.
  • the CDN system has its own management system GSLB system.
  • the CDN service used by the ISP the user's request is directly redirected to the GSLB of the CDN system.
  • the GSLB specifies the CDN according to the user's location according to the user's location.
  • the service node that is, the CDN component of the service control device in this embodiment.
  • the application system may be a web application, a video application, or the like.
  • each user state machine is added to both the CDN component and the network component, and the state machines of the two are independent of each other, specifically adding a content state machine to the CDN component, managing the link state of the user, and uploading/downloading the network. State, etc.; Add a network state machine to the network component to maintain the user's network state.
  • an internal interface between the network component and the network component is added to the CDN component; the CDN component can trigger a corresponding network to the network component according to the user state information maintained by the user, according to the change of the user application state, that is, according to the content usage state of the user.
  • the policy request may also apply for or revoke the corresponding content acceleration policy according to the application state of the user, obtain new policy information, or restore the user's business policy.
  • the state maintenance module 601 of the service control device such as the user resource usage status, the downloading start and completion status, and the user link status, maintains the user's content usage status after the user accesses the application through the CDN component, and the control module 602
  • the content acceleration and quality assurance policies may be applied according to the content usage status, and the network acceleration and quality assurance policy requests may be triggered to be sent to the network component according to the content usage status of the user.
  • the CDN and the application system can pre-define the corresponding negotiation mechanism.
  • the CDN component can judge the user as content acceleration and quality assurance, network acceleration and quality assurance according to the prior negotiation strategy, for example, according to the attribute of the user and the URL accessed by the user. , or the dual acceleration and quality assurance of the network and content; apply for the corresponding acceleration and quality assurance strategies according to the judgment result and the user's content usage status.
  • the CDN component determines whether to accelerate the content of the user according to the policy negotiated with the application system; if yes, the content acceleration and quality assurance for the user; otherwise, the content acceleration and quality guarantee are not performed for the user; the reason why the user content acceleration fails It can be caused by insufficient resources of the system.
  • the most accelerated content implementation is that the CDN component itself judges according to the established policy, and if the content acceleration is required, the acceleration is performed; of course, the network component determines that the user application download rate is too slow, and may trigger the content acceleration and guarantee request to the CDN component.
  • the network component After receiving the network acceleration and quality assurance policy request sent by the CDN component, the network component checks the corresponding user state according to the request message of the CDN component, and applies for the network acceleration and quality assurance policy based on the user to the policy control system. Specifically, the CDN component initiates a status according to a previously negotiated policy (such as whether the user is a member) and a user's content usage status (such as whether the user's application has obtained network acceleration and quality assurance), and initiates the network component through the internal interface of the service control device.
  • the network acceleration and quality assurance request for the user the network component checks the network connection status of the user according to the network acceleration and quality assurance request of the user, for example: checking whether the network status of the user is normal, or whether the user has dropped the line.
  • the state maintenance module 601 includes: a link establishing unit 6011 and a state maintaining unit 6012, where: a link establishing unit 6011 is configured to be set to access an application system by a user, and the application system weights the user After the CDN component of the service control device is directed, an application link between the CDN component and the user is established to provide a corresponding CDN service service for the user; the state maintenance unit 6012 is configured to create a content state machine for the user through the CDN component, and maintain the user.
  • the content usage status when the user needs to access the application service after accessing the network, the application sends an application access request to the application system.
  • the application system may be a web application, a video application, or the like.
  • the application system redirects the user to the CDN system, and the CDN system determines the CDN component that assigns the user to the corresponding service control device through a corresponding policy.
  • the CDN component of the service control device provides the user with a CDN service service, and the user accesses the corresponding application.
  • the CDN component of the service control device creates a content state machine for the user and maintains the user content state.
  • the service control device where the CDN component is located serves as the maintenance user content state machine and the network state.
  • the master node of the machine is responsible for maintaining the user status.
  • Other service nodes are only responsible for providing content and not maintaining user status.
  • the control module 602 includes: a determining unit 60, configured to determine, according to a previously negotiated policy, that the user is content acceleration and quality assurance, network acceleration and quality assurance, or dual acceleration and quality of network and content.
  • the operation unit 61 is configured to apply for a corresponding acceleration and quality assurance policy for the user according to the determination result and the content usage status of the user. As shown in FIG.
  • the operation unit 61 includes: a receiving unit 6021, a determining operation unit 6022, and an undo unit 6023, where:
  • the receiving unit 6021 is configured to apply for a content acceleration and quality assurance request or receive a content acceleration and quality assurance request of the user according to the pre-negotiated policy by the CDN component;
  • the determining operation unit 6022 is set to be based on the content usage status of the user.
  • the CDN system itself determines whether to accept the content acceleration and quality assurance request of the user; if yes, the content is accelerated and guaranteed for the user; otherwise, the content acceleration and quality assurance request of the user fails.
  • the receiving unit 6021 is further configured to initiate, by the CDN component, a network acceleration and quality assurance request for the user according to the content usage status of the user to the network component;
  • the determining operation unit 6022 is further configured to pass the The network component checks the network connection status of the user according to the network acceleration and quality assurance request of the user; if the network connection of the user is correct, apply to the policy control system for the network acceleration and quality assurance policy for the user, otherwise, discard The network acceleration and quality assurance policy for the user is performed by the network control unit, and the network acceleration and quality assurance policy issued by the policy control system is performed by the network component.
  • the revocation unit 6023 is configured to revoke the user's content acceleration and security policy and/or the user's network acceleration and quality assurance policy when the user application connection is interrupted or the user completes the application.
  • the CDN component of the service control device applies for the content acceleration service according to the content acceleration and quality assurance request of the user, and the specific content acceleration mode may be determined according to the specific implementation of the CDN system; Download method, there may be different solutions.
  • the download method may be Http, FTP, P2SP, etc.; when implemented, the advantages of CDN system and P2SP technology can be combined to provide content acceleration; through the combination of CDN system and P2P, It can make the content source more controllable and more reliable.
  • the CDN component initiates a network acceleration and quality assurance request for the user through the internal interface of the device to the network component.
  • the network component receives the user-based network acceleration and quality assurance request sent by the CDN component, checks the user status, including checking whether the user's network connection status is correct, and if the network connection is not detected, performing error processing; if the user status is correct, Then, based on the user applying for a network acceleration and quality assurance policy for the user to the policy control system.
  • the policy control system receives the network acceleration request, checks the online status and policy information of the user, and delivers a network acceleration and quality assurance policy for the user to the service control device. Whether the access network limits the rate of the user line is divided into the following two cases: In one case, the access network performs rate limiting on the user line. In this case, the network service control device needs to enhance user access through the ANCP protocol.
  • the access network does not rate the user. This situation only depends on the QoS guarantee policy deployed by the access network.
  • the user policy execution result of the network component is used to notify the CDN component through the internal interface of the device. Causes the CDN component to trigger the corresponding user content state machine migration.
  • the service control device also needs to feed back the success or failure message to the policy control system according to the result of the network policy implementation.
  • the acceleration and quality assurance of the network the user experience is greatly improved. It should be noted that the above-mentioned content acceleration and quality assurance policy control for users and network acceleration and quality assurance policy control for users may be implemented separately according to actual conditions, or may be implemented simultaneously, that is, content acceleration and quality assurance may be applied only for users.
  • the user application completion message triggers the CDN component to revoke the content acceleration policy for the user, and releases the corresponding CDN system resource; and also triggers the CDN component to send a request to the network component to revoke the user's network acceleration and security policy;
  • the component receives a user-based undo network acceleration from the CDN component
  • the user status is checked. If the error occurs, the error processing is performed. If the user status is correct, the user is requested to cancel the network acceleration and quality assurance policy of the user based on the policy control system.
  • the policy control system receives the message of canceling the network acceleration and security policy of the user, checks the online status and policy status of the user, and sends an instruction to the service control device to cancel the network acceleration and security policy of the user;
  • the service control device is completed by ANCP.
  • the user policy execution result of the network component notifies the CDN component through the device internal interface, so that the CDN component triggers the corresponding user content state machine migration.
  • the service control device feeds back the corresponding information to the policy control system according to the result of the policy execution.
  • the CDN component After the CDN component completes the policy revocation, the user's content state machine is closed, and the corresponding resources are released.
  • the CDN component can generate a corresponding charging record according to the user's status, the online situation, the downloaded content, the downloading time, the downloaded traffic, and the like, and can be transmitted to the charging system through the corresponding interface. It is also possible to interact with the network components through the internal interface, and then uniformly communicate with the charging system through the charging interface of the network component. In this embodiment, the network device and the CDN device are merged together, and the relative independence of the network component and the CDN component is maintained, and a loosely coupled fusion is formed.
  • FIG. 9 another embodiment of the present invention provides a service control device for converging a CDN with a network.
  • the method further includes: a receiving module 603, configured to receive a user by using a network component of the service control device.
  • the network access request is initiated; the authentication module 604 is configured to maintain the network state of the user through the network state machine, and authenticate the network access request of the user by using the AAA authentication system; and after the authentication is passed, allocate the initial network resource to the user.
  • the embodiment further includes a process in which the user accesses the network for AAA authentication. Specifically, when the user accesses the network, the user initiates a network access request to the service control device. After the service control device receives the network access request from the user, the network component maintains the user network status and initiates a user access request to the AAA authentication system. In the pre-authentication phase, the service control device needs to verify the access line of the user and the resource of the service control device.
  • the service admission control module checks the number of circuit sessions and the number of board sessions to determine whether the service control device processes the connection.
  • users obtain certain network resources, such as: PPPoE access mode; PPP links are established; IPoE access can obtain IP addresses, etc.; and the user's network status is maintained in the device, according to user access.
  • the information can be categorized and differentiated by the user for preliminary management; then the user requests authentication according to the corresponding configuration requirements.
  • the AAA authentication system authenticates the user. After the authentication is passed, the user authentication pass message is sent to the service control device, and the corresponding user initial network policy is sent. In the post-authentication phase, the user passes the AAA system authentication. As a legitimate user, more system resources can be obtained, and the corresponding network policies and permissions can be obtained for business use. At this stage, according to the authorization, it can also be divided into Multiple states, such as: restricted access, normal access, high priority protection, etc. It should be noted that, after the network is shut down, it needs to be triggered according to different events. The user's network state machine is shut down and the corresponding resources are released. The triggered event may be the normal offline request of the user, the abnormal drop detection result of the user, and the like.
  • the service control device receives the authentication pass message, triggers the user network state transition, and assigns the corresponding IP address to the user and applies the corresponding network policy; sends the user online charging packet to the AAA authentication system, notifying the AAA system that the user has started using the network service. , start billing.
  • the service control device sends the online package to the AAA system, notifying the AAA system that the user has started using the network service. , start billing.
  • the policy control system receives the online information of the user. After that, the user's online status and the user's current network policy status are maintained. In this way, the policy control system also obtains the correspondence between the user's IP address and the service control device address to which the user belongs.
  • the network access security authentication of the user is implemented through the foregoing solution.
  • the internal interaction of the network component and the CDN component occurs in the post-authentication phase, through the internally defined interface and signaling primitives.
  • the network component receives the network acceleration and security policy request from the CDN component for the user, it needs to check the network state machine of its own user. If the user does not exist, or the user does not belong to the post-authentication state, an error occurs. If the user is in the post-authentication phase, the policy control system may be requested to request an acceleration and quality assurance policy, and the policy is controlled according to the policy, so that the user enters the network high priority security state.
  • the network component receives the network policy revocation message sent by the CDN component for the user, and also needs to check the user status. If it is not in the post-authentication state, it will perform error processing, if it belongs to the post-authentication state. Then, the policy control system is applied for revocation of the network policy, and the user network acceleration and quality assurance policies are revoked according to the instructions issued by the policy control system, and feedback to the CDN component is triggered through the internal interface, and the user content state machine migration is triggered. In addition, after the content acceleration and quality assurance request or network acceleration and guarantee request fails, the user can also start the corresponding timing waiting mechanism while maintaining the original state, and initiate the request again after a certain interval.
  • the network device and the CDN device are integrated together, so that the network system and the CDN system exist as components of the system device, and the device level is integrated; and the loosely coupled fusion mode is used to maintain the network state and content of the user.
  • the state is relatively independent and easier to deploy and extend.
  • a user content state machine is maintained in the CDN component to facilitate management control, billing, and operation based on user-based content usage.
  • the internal interaction interface between the CDN component and the network component is also added, so that the system can implement network security and content guarantee for a specific user, specific content, and specific time period based on the user service state, and satisfy the user.
  • High requirements for network bandwidth, network quality, and content transfer rate in application scenarios such as file downloading and video viewing; and user state machines based on CDN components can distinguish between high-level users and ordinary users, in content acceleration and security policies. , network acceleration and security policies, differentiated services can be implemented based on different users; thus effectively improving the user experience.
  • the present invention integrates the CDN and the communication network device, and enhances the CDN system, adds a corresponding user state machine, implements refined management, control, and operation based on the user's content usage state, and simultaneously uses the content based on the user.
  • the state triggers the corresponding content and network security policy;
  • the corresponding internal communication protocol and interface are implemented in the content of the device to meet the interaction requirements of the CDN component and the network component.
  • the CDN component is used to sense and control the usage of the user application
  • the network component is used to sense and control the network usage of the user, so that the entire system implements collaborative control, management, and operation of the application and the network, thereby effectively improving the user service experience.

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Abstract

本发明公开一种CDN与网络融合的业务控制方法及业务控制设备，其方法包括:业务控制设备在用户访问应用后，维护用户的内容使用状态；根据内容使用状态及预先协商机制对用户进行应用策略和/或网络策略控制。本发明通过将CDN系统与网络设备融合形成业务控制设备，通过该设备内部CDN部件与网络部件之间的交互和协同，以及该设备与策略控制系统的交互，可针对特定用户的特定应用内容，在特定的时间段内，实施有针对性的网络加速和质量保障策略以及内容加速和质量保障策略；此外，还可以根据用户应用内容的使用状态触发策略请求、实施和撤销，从而有效提高系统的业务提供和保障能力，大幅提升用户业务体验。

Description

CDN与网络融合的业务控制方法及业务控制设备 技术领域 本发明涉及通信技术领域， 尤其涉及一种 CDN (Content Delivery Network, 内容 分发网络） 与网络融合的业务策略控制方法及业务控制设备。 背景技术 目前， 互联网上的应用越来越丰富， 逐渐向数据、 语音及视频方向发展， 尤其是 在线视频业务更是发展非常迅猛， 出现了很多的视频业务提供商， 如： y0Utobe、优酷、 土豆以及搜狐视频等。 但是， 由于视频业务对网络的质量要求很高， 网络的抖动、 丢 包、 中断等问题对视频的服务质量有很大的影响， 严重影响了用户体验， 比如在线视 频业务中， 常常会存在卡顿、 暂停缓冲以及业务中断等问题， 尤其是直播视频业务， 对网络质量的要求更高。 而互联网在设计上通常是朝着简单化、高性能方向发展，对应到 OSI的七层模型， 网络着重在三层及以下， 对应用的感知能力非常弱， 很难保证应用的服务质量， 尤其 是基于用户、 特定内容或在特定时间段实施的特定网络保障策略， 更是无法实现精细 化管理、 控制和运营。 在实际的业务运营中， 还存在网络提供商和内容提供商分离的问题， 网络提供商 只负责提供网络的连通， 不提供内容服务， 也无法感知具体的内容； 而内容提供商， 只提供内容， 无法感知和控制网络， 从而导致了两者的决然隔离， 无法保障用户的业 务体验。 目前有很多的 CDN服务提供商， 向 ICP/ISP提供 CDN服务， 在一定程度上能提 高内容的分发质量和速度，保证内容的稳定和可靠性，在一定程度上提升了用户体验; 但由于 CDN 系统只能维持用户的应用层链接， 网络层的连接控制由电信运营商的业 务控制设备进行控制， 导致了 CDN服务提供商无法感知和控制基础网络， 业务的提 供质量还是严重受限于基础网络的带宽和质量， 无法从根本上保证用户体验。 发明内容 本发明实施例提供了一种 CDN 与网络融合的业务控制方法及业务控制设备， 旨 在提高系统的业务提供和保障能力， 提升用户业务体验。 为了达到上述目的， 本发明实施例提出一种 CDN 与网络融合的业务控制方法， 包括： 业务控制设备在用户访问应用后， 维护用户的内容使用状态； 根据所述用户的内容使用状态及预先协商机制对用户进行应用策略和 /或网络策 略控制。 优选地， 在用户访问应用之前还包括： 所述业务控制设备的网络部件接收用户发起的网络接入请求； 通过网络状态机维持用户的网络状态， 并通过 AAA认证系统对用户的网络接入 请求进行认证； 当认证通过后， 为用户分配初始网络资源。 优选地， 所述业务控制设备在用户访问应用后， 维护用户的内容使用状态的步骤 包括： 在用户访问应用， 以及应用系统将用户重定向到业务控制设备的 CDN 部件后， 所述 CDN部件与用户建立应用链接， 为用户提供相应的 CDN业务服务； 由 CDN部件为用户创建内容状态机， 维护用户的内容使用状态。 优选地， 所述根据用户的内容使用状态及预先协商机制对用户进行应用策略和 / 或网络策略控制的步骤包括： 根据事先协商好的策略，判断用户是内容加速和质量保障、网络加速和质量保障， 或者是网络与内容双重加速和质量保障； 根据判断结果及用户的内容使用状态为用户申请相应的加速和质量保障策略。 优选地， 所述根据用户的内容使用状态为用户申请内容加速和质量保障策略的步 骤包括： 通过所述 CDN 部件根据预先协商好的策略为用户申请内容加速和质量保障请求 或接收用户的内容加速和质量保障请求； 根据用户的内容使用状态、 CDN系统自身资源情况， 判断是否接纳所述用户的内 容加速和质量保障请求； 若是， 则为用户进行内容加速和质量保障； 否则， 该用户的内容加速和质量保障 请求失败。 优选地， 所述根据用户的内容使用状态为用户申请网络加速和质量保障策略的步 骤包括： 所述 CDN 部件根据用户的内容使用状态， 并通过所述业务控制设备的内部接口 向网络部件发起针对该用户的网络加速和质量保障请求； 所述网络部件根据所述用户的网络加速和质量保障请求检查用户的网络连接状 态； 若所述用户的网络连接状态正确， 则向策略控制系统申请针对该用户的网络加速 和质量保障策略； 否则， 丢弃该用户的网络加速和质量保障请求； 当申请成功后， 所述网络部件执行所述策略控制系统下发的针对该用户的网络加 速及质量保障策略。 优选地， 所述根据用户的内容使用状态及预先协商机制对用户进行应用策略和 / 或网络策略控制的步骤进一步包括： 当用户应用连接中断或者用户完成应用时， 撤销用户的内容加速和质量保障策略 和 /或用户的网络加速及质量保障策略。 本发明实施例还提出一种 CDN与网络融合的业务控制设备， 包括： 状态维护模块， 设置为在用户访问应用后， 通过业务控制设备的 CDN 部件维护 用户的内容使用状态； 控制模块， 设置为根据所述内容使用状态及预先协商机制对用户进行应用策略和 / 或网络策略控制。 优选地， 该业务控制设备还包括： 接收模块， 设置为通过业务控制设备的网络部件接收用户发起的网络接入请求； 认证模块， 设置为通过网络状态机维持用户的网络状态， 并通过 AAA认证系统 对用户的网络接入请求进行认证； 当认证通过后， 为用户分配初始网络资源。 优选地， 所述状态维护模块包括： 链接建立单元， 设置为在用户访问应用， 以及应用系统将用户重定向业务控制设 备的 CDN部件后， 建立所述 CDN部件与用户之间的应用链接， 为用户提供相应的 CDN业务服务； 状态维护单元， 设置为通过所述 CDN 部件为用户创建内容状态机， 维护用户的 内容使用状态。 优选地， 所述控制模块包括： 判断单元， 设置为根据事先协商好的策略， 判断用户是内容加速和质量保障、 网 络加速和质量保障， 或者是网络与内容双重加速和质量保障； 操作单元， 设置为根据判断结果及用户的内容使用状态为用户申请相应的加速和 质量保障策略。 优选地， 所述操作单元包括： 接收单元， 设置为通过所述 CDN 部件根据预先协商好的策略为用户申请内容加 速和质量保障请求或接收用户的内容加速和质量保障请求； 判断操作单元， 设置为根据用户的内容使用状态、 CDN系统自身资源情况， 判断 是否接纳所述用户的内容加速和质量保障请求； 若是， 则为用户进行内容加速和保障； 否则， 该用户的内容加速和质量保障请求失败。 优选地， 所述接收单元， 还设置为通过所述 CDN 部件根据用户的内容使用状态 向网络部件发起针对该用户的网络加速和质量保障请求； 所述判断操作单元， 还设置为通过所述网络部件根据所述用户的网络加速和质量 保障请求检查用户的网络连接状态； 若所述用户的网络连接状态正确， 则向策略控制 系统申请针对该用户的网络加速和质量保障策略， 否则， 丢弃该用户的网络加速和质 量保障请求； 当申请成功后， 通过所述网络部件执行所述策略控制系统下发的针对该 用户的网络加速及质量保障策略。 优选地， 所述控制模块还包括： 撤销单元， 设置为当用户应用连接中断或者用户完成应用时， 撤销用户的内容加 速和保障策略和 /或用户的网络加速及质量保障策略。 本发明实施例提出的一种 CDN 与网络融合的业务控制方法及业务控制设备， 通 过将 CDN系统与网络设备融合形成业务控制设备， 通过该设备内部 CDN部件与网络 部件之间的交互和协同， 以及该设备与策略控制系统的交互， 可针对特定用户的特定 应用内容， 在特定的时间段内， 实施有针对性的网络加速和质量保障策略以及内容加 速和质量保障策略； 此外， 还可以根据用户应用内容的使用状态触发策略请求、 实施 和撤销， 从而有效提高系统的业务提供和保障能力， 大幅提升用户业务体验。 附图说明 图 1是本发明 CDN与网络融合的业务控制方法一实施例的流程示意图； 图 2是本发明 CDN与网络融合的业务控制方法一实施例中业务控制设备在用户 访问应用系统后， 维护用户的内容使用状态的流程示意图； 图 3是本发明 CDN与网络融合的业务控制方法一实施例中根据内容使用状态及 预先协商机制对用户进行应用策略控制的流程示意图； 图 4是本发明 CDN与网络融合的业务控制方法一实施例中根据内容使用状态及 预先协商机制对用户进行网络策略控制的流程示意图； 图 5是本发明 CDN与网络融合的业务控制方法另一实施例的流程示意图； 图 6是本发明 CDN与网络融合的业务控制设备一实施例的结构示意图； 图 7是本发明 CDN与网络融合的业务控制设备一实施例中获取模块的结构示意 图； 图 8a是本发明 CDN与网络融合的业务控制设备一实施例中控制模块的结构示意 图； 图 8b是本发明 CDN与网络融合的业务控制设备一实施例中操作单元的结构示意 图； 以及 图 9是本发明 CDN与网络融合的业务控制设备另一实施例的结构示意图。
为了使本发明实施例的技术方案更加清楚、明了， 下面将结合附图作进一步详述。 具体实施方式 本发明实施例的解决方案主要是： 将 CDN 系统与网络设备融合形成业务控制设 备， 通过该设备内部 CDN 部件与网络部件之间的交互和协同， 以及该设备与策略控 制系统的交互， 可针对特定用户的特定应用内容， 在特定的时间段内， 实施有针对性 的网络加速和质量保障策略以及内容加速和质量保障策略； 此外， 还可以根据用户应 用内容的使用状态触发策略请求、 实施和撤销， 以提高系统的业务提供和保障能力， 提升用户业务体验。 如图 1所示， 本发明一实施例提出一种 CDN与网络融合的业务控制方法， 包括： 步骤 S101， 业务控制设备在用户访问应用后， 维护用户的内容使用状态； 本实施例将 CDN系统与网络设备融合形成业务控制设备， CDN的基本思路是尽 可能避开互联网上有可能影响数据传输速度和稳定性的瓶颈和环节， 使内容传输的更 快、 更稳定。 CDN为通过在网络各处放置节点服务器所构成的在现有的互联网基础之 上的一层智能的叠加网络， 能够实时的根据网络流量和各节点的连接、 负载状况以及 到用户的距离和响应时间等综合信息， 将用户的请求导向离用户最近的服务节点上。 其目的是使用户可就近取得所需内容， 解决网络拥挤的状况， 提高用户访问应用的响 应速度。 本实施例业务控制设备将 CDN 系统的内容分发节点与网络设备进行融合， 作为 业务控制设备的 CDN 部件， 网络设备作为业务控制设备的网络部件， 由此， 使得该 业务控制设备既能提供网络服务能力， 也能提供 CDN服务能力， 同时能够高效地通 过业务控制设备内部交互原语， 实现 CDN 部件和网络部件两者的有效联动和信息共 享， 提升服务提供和保障能力。 业务控制设备中的 CDN 部件维护用户内容状态机， 并有相应的控制接口和网络 部件交互； 网络部件维护用户网络状态机， 并有相应的控制接口和 CDN 部件交互， 此外， 网络部件还有 AAA客户端的功能等等。 具体地， 当用户接入网络后， 网络部件维持用户的网络状态。 之后， 在用户访问 应用系统获取应用服务时， 用户被重定向到 CDN系统； CDN系统根据调度策略指定 相应的 CDN节点设备提供服务， 同时 CDN部件维护用户状态。 一般情况下， CDN 系统都有自己的管理系统的 GSLB系统， ISP采用的 CDN服务的情况下， 直接把用户 的请求重定向到 CDN系统的 GSLB， GSLB根据用户所在位置， 根据自己的策略指定 CDN服务节点， 即本实施例中业务控制设备的 CDN部件。 其中， 应用系统可以是 web应用以及视频应用等。 在本实施例中， 在 CDN 部件与网络部件中均增加有各自的用户状态机， 两者的 状态机相互独立， 具体在 CDN 部件中增加内容状态机， 管理用户的链接状态和网络 上传 /下载状态等； 在网络部件中增加网络状态机， 维护用户的网络状态。 同时在 CDN部件上增加和网络部件之间的交互内部接口； CDN部件可基于自身 维护的用户状态信息， 根据用户应用状态的变化， 即根据用户的内容使用状态， 触发 向网络部件发出相应的网络策略请求， 也可根据用户的内容使用状态申请或撤销相应 的内容加速策略， 获取新的策略信息或恢复用户的业务策略。 其中， 用户的内容使用状态包括用户资源使用情况、 下载的开启和完成状态、 用 户链接状态等。 步骤 S102，根据所述用户的内容使用状态及预先协商机制对用户进行应用策略和 /或网络策略控制。 如前所述， 业务控制设备的 CDN 部件在用户访问应用后维护用户的内容使用状 态， CDN部件可以根据该内容使用状态及预先协商机制申请相应的内容加速和质量保 障策略， 也可以根据用户的内容使用状态， 触发向网络部件发出相应的网络加速和质 量保障策略请求。 根据用户的属性、 访问的 URL， CDN 与应用系统之间可以预先制定相应的协商 机制， 在协商机制中商定哪些用户、 哪些 URL需要加速， 然后通过策略的形式事先下 发到 CDN部件， 在判断是否对用户进行内容或网络加速及质量保障策略时， CDN部 件可以根据事先协商好的策略， 比如根据用户的属性、用户访问的 URL判断， 判断用 户是内容加速和质量保障、 网络加速和质量保障， 或者是网络与内容双重加速和质量 保障； 根据判断结果及用户的内容使用状态为用户申请相应的加速和质量保障策略。 因此， CDN部件根据和应用系统协商的策略决定是否对用户进行内容加速， 如果 是则为用户进行内容加速和质量保障； 否则， 不为该用户进行内容加速和质量保障； 用户内容加速失败的原因可以是由于系统的资源不足而导致。 其中， 内容加速最多的 实现方式是 CDN 部件自身根据既定的策略进行判断， 需要内容加速的则进行加速； 当然， 网络部件判断用户应用下载速率过慢也可以触发向 CDN 部件发起内容加速和 保障请求。 网络部件在收到 CDN部件发来的网络加速和质量保障策略请求后， 根据 CDN部 件的请求消息， 检查相应的用户状态， 并基于用户向策略控制系统申请网络加速和质 量保障策略。 具体地， CDN部件根据事先协商的策略（比如用户是否为会员）及用户的内容使 用状态（比如用户的应用是否已得到网络加速和质量保障）， 并通过业务控制设备的内 部接口向网络部件发起针对该用户的网络加速和质量保障请求； 所述网络部件根据所 述用户的网络加速和质量保障请求检查用户的网络连接状态， 比如： 检查用户的网络 状态是否正常， 或者说用户是否已经掉线等； 若所述用户的网络连接状态正确， 则向 策略控制系统申请针对该用户的网络加速和质量保障策略； 当申请成功后， 策略控制系统向网络部件下发针对该用户的网络加速和质量保障 策略。 具体地， 如图 2所示， 上述步骤 S101可以包括： 步骤 S1011 , 在用户访问应用， 以及应用系统将用户重定向业务控制设备的 CDN 部件后， 所述 CDN部件与用户建立应用链接， 为用户提供相应的 CDN业务服务； 用户在接入网络后， 需要访问应用服务时， 向应用系统发送应用访问请求。其中， 应用系统可以是 web应用以及视频应用等。 应用系统接收到用户的应用访问请求后， 将用户重定向到 CDN系统， CDN系统 通过相应的策略确定将用户分配到相应的业务控制设备的 CDN部件。 步骤 S1012, 由 CDN部件为用户创建内容状态机， 维护用户的内容使用状态。 业务控制设备的 CDN部件为用户提供 CDN业务服务， 用户访问相应的应用， 业 务控制设备的 CDN部件为用户创建内容状态机， 维护用户内容状态。 其中， 针对采用 P2SP方式提供内容加速服务的情况下， 存在多个服务器， 多个 Peer为用户提供链接和下载服务的情况下， CDN部件所在的该业务控制设备作为维护 用户内容状态机和网络状态机的主节点， 负责维护用户状态， 其他服务节点只负责提 供内容， 不维护用户状态。 如图 3所示，上述步骤 S102中根据内容使用状态为用户申请内容加速和质量保障 策略的步骤包括： 步骤 S1021，通过所述 CDN部件根据预先协商好的策略为用户申请内容加速和质 量保障请求或接收用户的内容加速和质量保障请求； 在具体判断是否进行内容加速和质量保障时， 根据事先定好的策略， 用户属性、 URL, 在 CDN 部件内部直接申请； 或者还可以根据用户发送的内容加速和质量保障 请求来判断。 步骤 S1022， 根据用户的内容使用状态、 CDN系统自身资源情况， 判断是否接纳 所述用户的内容加速和质量保障请求;若是，则进入步骤 S1023;否则，进入步骤 S1024; 步骤 S1023， 为用户进行内容加速和质量保障； 步骤 S1024， 判定该用户的内容加速和质量保障请求失败。 具体地， 业务控制设备的 CDN 部件根据用户的内容加速和质量保障请求为该用 户申请内容加速服务， 具体的内容加速方式， 可根据 CDN 系统的具体实现来决定； 针对不同的链接方式、下载方式，可有不同的方案， 比如，下载方式可能是 Http、 FTP, P2SP等； 具体实现时， 可结合 CDN系统与 P2SP技术的优势， 提供内容的加速； 通 过 CDN系统和 P2P的结合，可以使得内容源更可控，也更可靠，同时还可以利用 P2SP 的特点， 实现多点到一点的传送， 实现多个内容源向用户传送， 充分保证用户内容源 的可靠性， 并可提升用户的下载速率； 此外， 也可以提供类似的分等级服务， 为高等 级用户提供更多、 更好的内容源节点， 提供更高的下载速度。 如图 4所示，上述步骤 S102中根据内容使用状态为用户申请网络加速和质量保障 策略的步骤包括： 步骤 S1025, 所述 CDN部件根据用户的内容使用状态， 并通过所述业务控制设备 的内部接口向网络部件发起针对该用户的网络加速和质量保障请求； 步骤 S1026, 所述网络部件根据所述用户的网络加速和质量保障请求检查用户的 网络连接状态； 若所述用户的网络连接状态正确， 则向策略控制系统申请针对该用户 的网络加速和质量保障策略； 步骤 S1027, 当申请成功后， 所述网络部件执行所述策略控制系统下发的针对该 用户的网络加速及质量保障策略。 具体地， 为保障网络传输的速度和质量， 由 CDN 部件通过设备内部接口向网络 部件发起针对该用户的网络加速和质量保障请求。 网络部件收到 CDN 部件发来的基于用户的网络加速和质量保障请求， 检查用户 状态， 包括检查用户的网络连接状态是否正确， 如果检查不到网络连接， 则做出错处 理； 如果用户状态正确， 则基于用户向策略控制系统申请针对该用户的网络加速和质 量保障策略。 策略控制系统收到网络加速请求， 检查用户的在线状态和策略信息， 向业务控制 设备下发针对该用户的网络加速和质量保障策略。 针对接入网是否对用户线路进行速率限制， 分为以下两种情况： 一种情况是接入网针对用户线路进行了速率限制， 这种情况需要网络业务控制设 备通过 ANCP协议提升用户的接入带宽； 另外一种情况是接入网没有针对用户进行速率限制， 这种情况只需依靠接入网部 署的 QoS保障策略即可； 网络部件的用户策略执行结果，通过设备内部接口通知 CDN 部件， 使得 CDN部件触发相应的用户内容状态机迁移。 此外， 业务控制设备根据网络策略实施的结果， 还需向策略控制系统反馈执行成 功或失败消息。 由此， 通过网络的加速和质量保障， 使得用户的体验得到极大提升。 需要说明的是， 上述图 3所示的对用户的内容加速和质量保障策略控制以及图 4 所示的对用户的网络加速和质量保障策略控制可以根据实际情况单独实施， 也可以同 时实施， 即可以仅为用户申请内容加速和质量保障策略， 或者仅为用户申请网络加速 和质量保障策略； 或者为用户同时申请内容加速和质量保障策略和网络加速和质量保 障策略， 以实现用户内容与网络融合保障。 在为用户同时申请内容加速和质量保障策略和网络加速和质量保障策略时， 可以 分先后顺序申请， 也可以同时申请。 此种情形下， 用户可得到内容和网络的联合加速 和质量保障， 使得用户的体验得到极大提升。 在用户业务使用完成后， CDN系统会得到用户的完成消息（通过业务链接的关闭 或其他相关的消息获取）。 此外， 在进一步的实施过程中， 当用户应用连接中断或者用户完成应用时， 业务 控制设备可以撤销用户的内容加速和质量保障策略和用户的网络加速及质量保障策 略。 具体地， 用户应用完成消息会触发 CDN 部件撤销对该用户的内容加速策略， 释 放相应的 CDN系统资源； 同时也会触发 CDN部件向网络部件发送撤销该用户的网络 加速和保障策略的请求； 网络部件收到 CDN 部件发来的基于用户的撤销网络加速和 保障策略的请求时， 检查用户状态， 如果出错， 则做出错处理； 如果用户状态正确， 则基于用户向策略控制系统请求撤销该用户的网络加速和质量保障策略。 策略控制系统收到撤销用户的网络加速和保障策略的消息， 检查用户在线状态和 策略状态， 向业务控制设备下发指令， 撤销该用户的网络加速和保障策略； 接入网的 策略撤销， 由业务控制设备通过 ANCP完成。 网络部件的用户策略执行结果， 通过设 备内部接口通知 CDN部件， 使得 CDN部件触发相应的用户内容状态机迁移。 业务控制设备根据策略执行的结果， 向策略控制系统反馈相应的信息。
CDN部件完成策略撤销后， 关闭用户的内容状态机， 释放相应的资源。 针对计费方面， 可由 CDN 部件根据用户的状态， 在线情况以及下载的内容、 下 载的时间、下载的流量等生成相应的计费记录， 并可通过相应的接口传送给计费系统。 也可以通过内部接口和网络部件交互， 再统一通过网络部件的计费接口， 向计费系统 反馈。 本实施例将网络设备和 CDN设备融合在一起， 同时保持了网络部件和 CDN部件 的相对独立性， 形成松耦合的融合； 为了实现内容和网络的交互和联动， 增加了网络 部件和 CDN部件之间交互的内部接口和信令， 能高效地实现内容和网络质量的保障， 提升用户体验。 此外， 在具体的部署上也更为简单， 并能降低部署和维护成本。 内部 接口实现网络功能和 CDN服务功能的整合更为方便和高效， 可靠性也更高。 如图 5所示， 本发明另一实施例提出一种 CDN与网络融合的业务控制方法， 在 上述实施例的基础上， 在上述步骤 S101之前还包括： 步骤 S103， 所述业务控制设备的网络部件接收用户发起的网络接入请求； 步骤 S104， 通过网络状态机维持用户的网络状态， 并通过 AAA认证系统对用户 的网络接入请求进行认证； 步骤 S105， 当认证通过后， 为用户分配初始网络资源。 本实施例与上述实施例的区别在于， 本实施例还包括用户访问应用之前， 入网络进行 AAA认证的过程。 具体地， 用户在接入网络时， 向业务控制设备发起网络接入请求。 业务控制设备收到用户的网络接入请求后， 网络部件维持用户网络状态， 并向 AAA认证系统发起用户接入请求。 在认证前阶段， 业务控制设备需要先验证用户的接入线路以及业务控制设备的资 源情况， 通过业务接纳控制模块进行电路会话数、 单板会话数等的检查， 确定业务控 制设备是否处理该接入请求。 在认证前阶段，用户获得一定的的网络资源， 比如： PPPoE接入方式；会建立 PPP 链接； IPoE接入可以获得 IP地址等； 并在设备中开始维护用户的网络状态， 根据用 户的接入信息可以对用户进行一定的归属和区分， 进行初步的管理； 之后用户根据相 应的配置要求， 请求认证。
AAA认证系统对用户进行认证， 认证通过后， 则向业务控制设备发送用户认证通 过消息， 以及相应的用户初始网络策略。 在认证后阶段， 用户通过了 AAA系统认证， 为合法用户， 可获得更多的系统资 源， 可获得相应的网络策略和权限， 进行业务使用； 在该阶段， 根据授权的不同， 也 可以分为多个状态， 比如： 访问受限， 正常访问， 高优先级保障等。 需要说明的是， 后续网络关闭， 需要根据不同的事件触发， 执行用户的网络状态 机关闭， 释放相应的资源； 触发的事件可能是用户的正常下线请求， 用户的异常掉线 检测结果等。 业务控制设备收到认证通过消息， 触发用户网络状态迁移， 并为用户分配相应的 IP地址和应用相应的网络策略； 向 AAA认证系统发送用户上线计费包，通知 AAA系 统用户已经开始使用网络服务， 开始计费。 其中， 为了在策略控制系统维护用户的在线状态和策略信息， 业务控制设备在向 AAA系统发送上线包时， 也需要同时发送同样的一份信息到策略控制系统； 策略控制 系统收到用户上线信息之后， 维持用户的在线状态以及用户当前的网络策略状态， 通 过此种方式，策略控制系统也获得了用户的 IP地址和其所属的业务控制设备地址的对 应关系。 本实施例通过上述方案， 实现了用户的网络接入安全认证。 还需要说明的是， 在业务控制设备中， 网络部件和 CDN 部件的内部交互发生在 认证后阶段， 通过内部定义的接口和信令原语完成。 网络部件收到 CDN 部件发来的针对用户的网络加速和保障策略请求时， 需要检 查自身用户的网络状态机， 如发现用户不存在， 或用户不属于认证后状态， 则做出错 处理； 如用户处于认证后阶段， 则可向策略控制系统请求加速和质量保障策略， 根据 策略控制系统下发的策略， 使得该用户进入网络高优先级保障状态。 同理， 在用户业务使用完成后， 网络部件收到 CDN 部件发来的针对用户的网络 策略撤销消息， 也需进行用户状态检查， 若不属于认证后状态则做出错处理， 若属于 认证后状态， 则向策略控制系统申请撤销网络策略， 根据策略控制系统下发的指令， 撤销用户网络加速和质量保障策略， 并通过内部接口向 CDN 部件反馈， 触发用户内 容状态机迁移。 此外， 用户在内容加速和质量保障请求或网络加速和保障请求失败后， 还可以在 维持原状态的情况下， 启动相应的计时等待机制， 一定间隔后再次发起请求。 本实施例将网络设备和 CDN设备整合到一起， 使网络系统和 CDN系统作为该系 统设备的部件存在， 实现了设备层面的融合； 并采用松耦合的融合方式， 保持着用户 的网络状态和内容状态的相对独立， 更容易于部署和扩展。 在 CDN 部件中维护有用 户内容状态机， 便于实现基于用户的内容使用进行管理控制， 计费和运营。 同时也增 加了 CDN 部件与网络部件之间的设备内部交互接口， 使得该系统可实现基于用户业 务状态触发的、 针对特定用户、 特定内容， 在特定时间段内的网络保障和内容保障， 满足用户在文件下载、 视频观看等应用场景中对网络带宽、 网络质量以及内容传送速 率等方面的高要求； 而且基于 CDN 部件的用户状态机， 可区分高等级用户和普通用 户， 在内容加速和保障策略、 网络加速和保障策略上， 可基于不同的用户实施差异化 的服务； 由此有效提升用户体验。 如图 6所示， 本发明一实施例提出一种 CDN与网络融合的业务控制设备， 包括： 状态维护模块 601以及控制模块 602， 其中： 状态维护模块 601， 设置为在用户访问应用后， 维护用户的内容使用状态； 控制模块 602， 设置为根据所述内容使用状态及预先协商机制对用户进行应用策 略和 /或网络策略控制。 本实施例将 CDN系统与网络设备融合形成业务控制设备， CDN的基本思路是尽 可能避开互联网上有可能影响数据传输速度和稳定性的瓶颈和环节， 使内容传输的更 快、 更稳定。 CDN为通过在网络各处放置节点服务器所构成的在现有的互联网基础之 上的一层智能叠加网络， 能够实时的根据网络流量和各节点的连接、 负载状况以及到 用户的距离和响应时间等综合信息， 将用户的请求导向离用户最近的服务节点上。 其 目的是使用户可就近取得所需内容， 解决网络拥挤的状况， 提高用户访问网站的响应 速度。 本实施例业务控制设备将 CDN 系统的内容分发节点与网络设备进行融合， 作为 业务控制设备的 CDN 部件， 网络设备作为业务控制设备的网络部件， 由此， 使得该 业务控制设备既能提供网络服务能力， 也能提供 CDN服务能力， 同时能够高效地通 过业务控制设备内部交互原语， 实现 CDN 部件和网络部件两者的有效联动和信息共 享， 提升服务提供和保障能力。 业务控制设备中的 CDN 部件维护用户内容状态机， 并有相应的控制接口和网络 部件交互； 网络部件维护用户网络状态机， 并有相应的控制接口和 CDN 部件交互， 此外， 网络部件还有 AAA客户端的功能等等。 具体地， 当用户接入网络后， 网络部件维持用户的网络状态。 之后， 在用户访问 应用系统获取应用服务时， 用户被重定向到 CDN系统； CDN系统根据调度策略指定 相应的 CDN节点设备提供服务， 同时 CDN部件维护用户状态。 一般情况下， CDN 系统都有自己的管理系统的 GSLB系统， ISP采用的 CDN服务的情况下， 直接把用户 的请求重定向到 CDN系统的 GSLB， GSLB根据用户所在位置， 根据自己的策略指定 CDN服务节点， 即本实施例中业务控制设备的 CDN部件。 其中， 应用系统可以是 web应用以及视频应用等。 在本实施例中， 在 CDN 部件与网络部件中均增加有各自的用户状态机， 两者的 状态机相互独立， 具体在 CDN 部件中增加内容状态机， 管理用户的链接状态和网络 上传 /下载状态等； 在网络部件中增加网络状态机， 维护用户的网络状态。 同时在 CDN部件上增加和网络部件之间的交互内部接口； CDN部件可基于自身 维护的用户状态信息， 根据用户应用状态的变化， 即根据用户的内容使用状态， 触发 向网络部件发出相应的网络策略请求， 也可根据用户的应用状态申请或撤销相应的内 容加速策略， 获取新的策略信息或恢复用户的业务策略。 其中， 用户使用内容的状态包括用户资源使用情况、 下载的开启和完成状态、 用 户链接状态等 业务控制设备的状态维护模块 601通过 CDN部件在用户访问应用后维护用户的 内容使用状态， 控制模块 602可以根据该内容使用状态申请相应的内容加速和质量保 障策略， 也可以根据用户的内容使用状态， 触发向网络部件发出相应的网络加速和质 量保障策略请求。 根据用户的属性、 访问的 URL， CDN 与应用系统之间可以预先制定相应的协商 机制， 在协商机制中商定哪些用户、 哪些 URL需要加速， 然后通过策略的形式事先下 发到 CDN部件， 在判断是否对用户进行内容或网络加速及质量保障策略时， CDN部 件可以根据事先协商好的策略， 比如根据用户的属性、用户访问的 URL判断， 判断用 户是内容加速和质量保障、 网络加速和质量保障， 或者是网络与内容双重加速和质量 保障； 根据判断结果及用户的内容使用状态为用户申请相应的加速和质量保障策略。 因此， CDN部件根据和应用系统协商的策略决定是否对用户进行内容加速； 如果 是则为用户进行内容加速和质量保障； 否则， 不为该用户进行内容加速和质量保障； 用户内容加速失败的原因可以是由于系统的资源不足而导致。 其中， 内容加速最多的 实现方式是 CDN 部件自身根据既定的策略进行判断， 需要内容加速的则进行加速； 当然， 网络部件判断用户应用下载速率过慢也可以触发向 CDN 部件发起内容加速和 保障请求。 网络部件在收到 CDN部件发来的网络加速和质量保障策略请求后， 根据 CDN部 件的请求消息， 检查相应的用户状态， 并基于用户向策略控制系统申请网络加速和质 量保障策略。 具体地， CDN部件根据事先协商的策略（比如用户是否为会员）及用户的内容使 用状态（比如用户的应用是否已得到网络加速和质量保障）， 并通过业务控制设备的内 部接口向网络部件发起针对该用户的网络加速和质量保障请求； 所述网络部件根据所 述用户的网络加速和质量保障请求检查用户的网络连接状态， 比如： 检查用户的网络 状态是否正常， 或者说用户是否已经掉线等； 若所述用户的网络连接状态正确， 则向 策略控制系统申请针对该用户的网络加速和质量保障策略； 当申请成功后， 策略控制系统向网络部件下发针对该用户的网络加速和质量保障 策略。 具体地， 如图 7所示， 所述状态维护模块 601包括： 链接建立单元 6011以及状态 维护单元 6012， 其中： 链接建立单元 6011， 设置为设置为在用户访问应用系统， 以及应用系统将用户重 定向业务控制设备的 CDN部件后， 建立所述 CDN部件与用户之间的应用链接， 为用 户提供相应的 CDN业务服务； 状态维护单元 6012， 设置为通过 CDN部件为用户创建内容状态机， 维护用户的 内容使用状态。 具体地， 用户在接入网络后， 需要访问应用服务时， 向应用系统发送应用访问请 求。 其中， 应用系统可以是 web应用以及视频应用等。 应用系统接收到用户的应用访问请求后， 将用户重定向到 CDN系统， CDN系统 通过相应的策略确定将用户分配到相应的业务控制设备的 CDN部件。 业务控制设备的 CDN部件为用户提供 CDN业务服务， 用户访问相应的应用， 业 务控制设备的 CDN部件为用户创建内容状态机， 维护用户内容状态。 其中， 针对采用 P2SP方式提供内容加速服务的情况下， 存在多个服务器， 多个 Peer为用户提供链接和下载服务的情况下， CDN部件所在的该业务控制设备作为维护 用户内容状态机和网络状态机的主节点， 负责维护用户状态， 其他服务节点只负责提 供内容， 不维护用户状态。 如图 8a所示， 所述控制模块 602包括： 判断单元 60， 设置为根据事先协商好的策略， 判断用户是内容加速和质量保障、 网络加速和质量保障， 或者是网络与内容双重加速和质量保障； 在具体判断是否进行内容加速和质量保障时， 根据事先定好的策略， 用户属性、 URL, 在 CDN 部件内部直接申请； 或者还可以根据用户发送的内容加速和质量保障 请求来判断。 操作单元 61， 设置为根据判断结果及用户的内容使用状态为用户申请相应的加速 和质量保障策略。 如图 8b所示， 所述操作单元 61包括: 接收单元 6021、 判断操作单元 6022以及撤销单元 6023， 其中: 接收单元 6021， 设置为通过所述 CDN部件根据预先协商好的策略为用户申请内 容加速和质量保障请求或接收用户的内容加速和质量保障请求； 判断操作单元 6022， 设置为根据用户的内容使用状态、 CDN系统自身资源情况， 判断是否接纳所述用户的内容加速和质量保障请求； 若是， 则为用户进行内容加速和 保障； 否则， 该用户的内容加速和质量保障请求失败。 进一步地， 所述接收单元 6021， 还设置为通过所述 CDN部件根据用户的内容使 用状态向网络部件发起针对该用户的网络加速和质量保障请求； 所述判断操作单元 6022， 还设置为通过所述网络部件根据所述用户的网络加速和 质量保障请求检查用户的网络连接状态； 若所述用户的网络连接正确， 则向策略控制 系统申请针对该用户的网络加速和质量保障策略， 否则， 丢弃该用户的网络加速和质 量保障请求； 当申请成功后， 通过所述网络部件执行所述策略控制系统下发的针对该 用户的网络加速及质量保障策略。 所述撤销单元 6023， 设置为当用户应用连接中断或者用户完成应用时， 撤销用户 的内容加速和保障策略和 /或用户的网络加速及质量保障策略。 在本实施例中， 业务控制设备的 CDN 部件根据用户的内容加速和质量保障请求 为该用户申请内容加速服务， 具体的内容加速方式， 可根据 CDN 系统的具体实现来 决定；针对不同的链接方式、下载方式，可有不同的方案， 比如，下载方式可能是 Http、 FTP, P2SP等； 具体实现时，可结合 CDN系统与 P2SP技术的优势，提供内容的加速； 通过 CDN系统和 P2P的结合， 可以使得内容源更可控， 也更可靠， 同时还可以利用 P2SP的特点， 实现多点到一点的传送， 实现多个内容源向用户传送， 充分保证用户内 容源的可靠性， 并可提升用户的下载速率； 此外， 也可以提供类似的分等级服务， 为 高等级用户提供更多、 更好的内容源节点， 提供更高的下载速度。 为保障网络传输的速度和质量， 由 CDN 部件通过设备内部接口向网络部件发起 针对该用户的网络加速和质量保障请求。 网络部件收到 CDN 部件发来的基于用户的网络加速和质量保障请求， 检查用户 状态， 包括检查用户的网络连接状态是否正确， 如果检查不到网络连接， 则做出错处 理； 如果用户状态正确， 则基于用户向策略控制系统申请针对该用户的网络加速和质 量保障策略。 策略控制系统收到网络加速请求， 检查用户的在线状态和策略信息， 向业务控制 设备下发针对该用户的网络加速和质量保障策略。 针对接入网是否对用户线路进行速率限制， 分为以下两种情况： 一种情况是接入网针对用户线路进行了速率限制， 这种情况需要网络业务控制设 备通过 ANCP协议提升用户的接入带宽； 另外一种情况是接入网没有针对用户进行速率限制， 这种情况只需依靠接入网部 署的 QoS保障策略即可； 网络部件的用户策略执行结果，通过设备内部接口通知 CDN 部件， 使得 CDN部件触发相应的用户内容状态机迁移。 此外， 业务控制设备根据网络策略实施的结果， 还需向策略控制系统反馈执行成 功或失败消息。 由此， 通过网络的加速和质量保障， 使得用户的体验得到极大提升。 需要说明的是， 上述对用户的内容加速和质量保障策略控制以及对用户的网络加 速和质量保障策略控制可以根据实际情况单独实施， 也可以同时实施， 即可以仅为用 户申请内容加速和质量保障策略， 或者仅为用户申请网络加速和质量保障策略； 或者 为用户同时申请内容加速和质量保障策略和网络加速和质量保障策略， 以实现用户内 容与网络融合保障。 在为用户同时申请内容加速和质量保障策略和网络加速和质量保障策略时， 可以 分先后顺序申请， 也可以同时申请。 此种情形下， 用户可得到内容和网络的联合加速 和质量保障， 使得用户的体验得到极大提升。 在用户业务使用完成后， CDN系统会得到用户的完成消息（通过业务链接的关闭 或其他相关的消息获取）。 此外， 在进一步的实施过程中， 当用户应用连接中断或者用户完成应用时， 业务 控制设备可以撤销用户的内容加速和质量保障策略和用户的网络加速及质量保障策 略。 具体地， 用户应用完成消息会触发 CDN 部件撤销对该用户的内容加速策略， 释 放相应的 CDN系统资源； 同时也会触发 CDN部件向网络部件发送撤销该用户的网络 加速和保障策略的请求； 网络部件收到 CDN 部件发来的基于用户的撤销网络加速和 保障策略的请求时， 检查用户状态， 如果出错， 则做出错处理； 如果用户状态正确， 则基于用户向策略控制系统请求撤销该用户的网络加速和质量保障策略。 策略控制系统收到撤销用户的网络加速和保障策略的消息， 检查用户在线状态和 策略状态， 向业务控制设备下发指令， 撤销该用户的网络加速和保障策略； 接入网的 策略撤销， 由业务控制设备通过 ANCP完成。 网络部件的用户策略执行结果， 通过设 备内部接口通知 CDN部件， 使得 CDN部件触发相应的用户内容状态机迁移。 业务控制设备根据策略执行的结果， 向策略控制系统反馈相应的信息。
CDN部件完成策略撤销后， 关闭用户的内容状态机， 释放相应的资源。 针对计费方面， 可由 CDN 部件根据用户的状态， 在线情况以及下载的内容、 下 载的时间、下载的流量等生成相应的计费记录， 并可通过相应的接口传送给计费系统。 也可以通过内部接口和网络部件交互， 再统一通过网络部件的计费接口， 向计费系统 反馈。 本实施例将网络设备和 CDN设备融合在一起， 同时保持了网络部件和 CDN部件 的相对独立性， 形成松耦合的融合； 为了实现内容和网络的交互和联动， 增加了网络 部件和 CDN部件之间交互的内部接口和信令， 能高效地实现内容和网络质量的保障， 提升用户体验。 此外， 在具体的部署上也更为简单， 并能降低部署和维护成本。 内部 接口实现网络功能和 CDN服务功能的整合更为方便和高效， 可靠性也更高。 如图 9所示， 本发明另一实施例提出一种 CDN与网络融合的业务控制设备， 在 上述实施例的基础上， 还包括： 接收模块 603， 设置为通过业务控制设备的网络部件接收用户发起的网络接入请 求； 认证模块 604， 设置为通过网络状态机维持用户的网络状态， 并通过 AAA认证系 统对用户的网络接入请求进行认证； 当认证通过后， 为用户分配初始网络资源。 本实施例与上述实施例的区别在于， 本实施例还包括用户接入网络进行 AAA认 证的过程。 具体地， 用户在接入网络时， 向业务控制设备发起网络接入请求。 业务控制设备收到用户的网络接入请求后， 网络部件维持用户网络状态， 并向 AAA认证系统发起用户接入请求。 在认证前阶段， 业务控制设备需要先验证用户的接入线路以及业务控制设备的资 源情况， 通过业务接纳控制模块进行电路会话数、 单板会话数等的检查， 确定业务控 制设备是否处理该接入请求。 在认证前阶段，用户获得一定的的网络资源， 比如： PPPoE接入方式；会建立 PPP 链接； IPoE接入可以获得 IP地址等； 并在设备中开始维护用户的网络状态， 根据用 户的接入信息可以对用户进行一定的归属和区分， 进行初步的管理； 之后用户根据相 应的配置要求， 请求认证。
AAA认证系统对用户进行认证， 认证通过后， 则向业务控制设备发送用户认证通 过消息， 以及相应的用户初始网络策略。 在认证后阶段， 用户通过了 AAA系统认证， 为合法用户， 可获得更多的系统资 源， 可获得相应的网络策略和权限， 进行业务使用； 在该阶段， 根据授权的不同， 也 可以分为多个状态， 比如： 访问受限， 正常访问， 高优先级保障等。 需要说明的是， 后续网络关闭， 需要根据不同的事件触发， 执行用户的网络状态 机关闭， 释放相应的资源； 触发的事件可能是用户的正常下线请求， 用户的异常掉线 检测结果等。 业务控制设备收到认证通过消息， 触发用户网络状态迁移， 并为用户分配相应的 IP地址和应用相应的网络策略； 向 AAA认证系统发送用户上线计费包，通知 AAA系 统用户已经开始使用网络服务， 开始计费。 其中， 为了在策略控制系统维护用户的在线状态和策略信息， 业务控制设备在向 AAA系统发送上线包时， 也需要同时发送同样的一份信息到策略控制系统； 策略控制 系统收到用户上线信息之后， 维持用户的在线状态以及用户当前的网络策略状态， 通 过此种方式，策略控制系统也获得了用户的 IP地址和其所属的业务控制设备地址的对 应关系。 本实施例通过上述方案， 实现了用户的网络接入安全认证。 还需要说明的是， 在业务控制设备中， 网络部件和 CDN 部件的内部交互发生在 认证后阶段， 通过内部定义的接口和信令原语完成。 网络部件收到 CDN 部件发来的针对用户的网络加速和保障策略请求时， 需要检 查自身用户的网络状态机， 如发现用户不存在， 或用户不属于认证后状态， 则做出错 处理； 如用户处于认证后阶段， 则可向策略控制系统请求加速和质量保障策略， 根据 策略控制系统下发的策略， 使得该用户进入网络高优先级保障状态。 同理， 在用户业务使用完成后， 网络部件收到 CDN 部件发来的针对用户的网络 策略撤销消息， 也需进行用户状态检查， 若不属于认证后状态则做出错处理， 若属于 认证后状态， 则向策略控制系统申请撤销网络策略， 根据策略控制系统下发的指令， 撤销用户网络加速和质量保障策略， 并通过内部接口向 CDN 部件反馈， 触发用户内 容状态机迁移。 此外， 用户在内容加速和质量保障请求或网络加速和保障请求失败后， 还可以在 维持原状态的情况下， 启动相应的计时等待机制， 一定间隔后再次发起请求。 本实施例将网络设备和 CDN设备整合到一起， 使网络系统和 CDN系统作为该系 统设备的部件存在， 实现了设备层面的融合； 并采用松耦合的融合方式， 保持着用户 的网络状态和内容状态的相对独立， 更容易于部署和扩展。 在 CDN 部件中维护有用 户内容状态机， 便于实现基于用户的内容使用进行管理控制， 计费和运营。 同时也增 加了 CDN 部件与网络部件之间的设备内部交互接口， 使得该系统可实现基于用户业 务状态触发的、 针对特定用户、 特定内容， 在特定时间段内的网络保障和内容保障， 满足用户在文件下载、 视频观看等应用场景中对网络带宽、 网络质量以及内容传送速 率等方面的高要求； 而且基于 CDN 部件的用户状态机， 可区分高等级用户和普通用 户， 在内容加速和保障策略、 网络加速和保障策略上， 可基于不同的用户实施差异化 的服务； 由此有效提升用户体验。 为此本发明把 CDN和通信网络设备进行融合， 并对 CDN系统进行增强， 增加了 相应的用户状态机， 实现基于用户的内容使用状态的精细化管理、 控制和运营， 同时 基于用户的内容使用状态触发相应的内容和网络保障策略； 为了使得 CDN 部件和网 络部件的有效协同和联动， 在设备的内容实现相应的内部通信协议和接口， 满足 CDN 部件和网络部件的交互需求。 使用 CDN 部件实现对用户应用使用进行感知和控制， 使用网络部件对用户的网络使用进行感知和控制， 从而使得整个系统实现对用户的应 用和网络协同控制、 管理和运营， 有效提升用户业务体验。 以上所述仅为本发明的优选实施例， 并非因此限制本发明的专利范围， 凡是利用 本发明说明书及附图内容所作的等效结构或流程变换， 或直接或间接运用在其它相关 的技术领域， 均同理包括在本发明的专利保护范围内。

Claims

权 利 要 求 书 、 一种 CDN与网络融合的业务控制方法， 包括：
业务控制设备在用户访问应用后， 维护用户的内容使用状态；
根据所述用户的内容使用状态及预先协商机制对用户进行应用策略和 /或 网络策略控制。 、 根据权利要求 1所述的方法， 其中， 在用户访问应用之前还包括：
所述业务控制设备的网络部件接收用户发起的网络接入请求；
通过网络状态机维持用户的网络状态， 并通过 AAA认证系统对用户的网 络接入请求进行认证；
当认证通过后， 为用户分配初始网络资源。 、 根据权利要求 2所述的方法， 其中， 所述业务控制设备在用户访问应用后， 维 护用户的内容使用状态的步骤包括：
在用户访问应用， 以及应用系统将用户重定向到业务控制设备的 CDN部 件后，所述 CDN部件与用户建立应用链接，为用户提供相应的 CDN业务服务； 由 CDN部件为用户创建内容状态机， 维护用户的内容使用状态。 、 根据权利要求 3所述的方法， 其中， 所述根据用户的内容使用状态及预先协商 机制对用户进行应用策略和 /或网络策略控制的步骤包括：
根据事先协商好的策略， 判断用户是内容加速和质量保障、 网络加速和质 量保障， 或者是网络与内容双重加速和质量保障；
根据判断结果及用户的内容使用状态为用户申请相应的加速和质量保障策 略。 、 根据权利要求 4所述的方法， 其中， 所述根据用户的内容使用状态为用户申请 内容加速和质量保障策略的步骤包括：
通过所述 CDN部件根据预先协商好的策略为用户申请内容加速和质量保 障请求或接收用户的内容加速和质量保障请求；
根据用户的内容使用状态、 CDN系统自身资源情况， 判断是否接纳所述用 户的内容加速和质量保障请求； 若是， 则为用户进行内容加速和质量保障； 否则， 该用户的内容加速和质 量保障请求失败。 、 根据权利要求 4或 5所述的方法， 其中， 所述根据用户的内容使用状态为用户 申请网络加速和质量保障策略的步骤包括：
所述 CDN部件根据用户的内容使用状态， 并通过所述业务控制设备的内 部接口向网络部件发起针对该用户的网络加速和质量保障请求；
所述网络部件根据所述用户的网络加速和质量保障请求检查用户的网络连 接状态； 若所述用户的网络连接状态正确， 则向策略控制系统申请针对该用户 的网络加速和质量保障策略； 否则， 丢弃该用户的网络加速和质量保障请求； 当申请成功后， 所述网络部件执行所述策略控制系统下发的针对该用户的 网络加速及质量保障策略。 、 根据权利要求 6所述的方法， 其中， 所述根据用户的内容使用状态及预先协商 机制对用户进行应用策略和 /或网络策略控制的步骤进一步包括：
当用户应用连接中断或者用户完成应用时， 撤销用户的内容加速和质量保 障策略和 /或用户的网络加速及质量保障策略。 、 一种 CDN与网络融合的业务控制设备， 包括：
状态维护模块， 设置为在用户访问应用后， 通过业务控制设备的 CDN部 件维护用户的内容使用状态；
控制模块， 设置为根据所述内容使用状态及预先协商机制对用户进行应用 策略和 /或网络策略控制。 、 根据权利要求 8所述的业务控制设备， 其中， 还包括：
接收模块， 设置为通过业务控制设备的网络部件接收用户发起的网络接入 请求；
认证模块， 设置为通过网络状态机维持用户的网络状态， 并通过 AAA认 证系统对用户的网络接入请求进行认证； 当认证通过后， 为用户分配初始网络 资源。 根据权利要求 8所述的业务控制设备， 其中， 所述状态维护模块包括: 链接建立单元， 设置为在用户访问应用， 以及应用系统将用户重定向业务 控制设备的 CDN部件后， 建立所述 CDN部件与用户之间的应用链接， 为用户 提供相应的 CDN业务服务；
状态维护单元， 设置为通过所述 CDN部件为用户创建内容状态机， 维护 用户的内容使用状态。 、 根据权利要求 8、 9或 10所述的业务控制设备， 其中， 所述控制模块包括： 判断单元， 设置为根据事先协商好的策略， 判断用户是内容加速和质量保 障、 网络加速和质量保障， 或者是网络与内容双重加速和质量保障；
操作单元， 设置为根据判断结果及用户的内容使用状态为用户申请相应的 加速和质量保障策略。 、 根据权利要求 11所述的业务控制设备， 其中， 所述操作单元包括：
接收单元， 设置为通过所述 CDN部件根据预先协商好的策略为用户申请 内容加速和质量保障请求或接收用户的内容加速和质量保障请求；
判断操作单元，设置为根据用户的内容使用状态、 CDN系统自身资源情况， 判断是否接纳所述用户的内容加速和质量保障请求； 若是， 则为用户进行内容 加速和保障； 否则， 该用户的内容加速和质量保障请求失败。 、 根据权利要求 12所述的业务控制设备， 其中，
所述接收单元， 还设置为通过所述 CDN部件根据用户的内容使用状态向 网络部件发起针对该用户的网络加速和质量保障请求；
所述判断操作单元， 还设置为通过所述网络部件根据所述用户的网络加速 和质量保障请求检查用户的网络连接状态； 若所述用户的网络连接状态正确， 则向策略控制系统申请针对该用户的网络加速和质量保障策略， 否则， 丢弃该 用户的网络加速和质量保障请求； 当申请成功后， 通过所述网络部件执行所述 策略控制系统下发的针对该用户的网络加速及质量保障策略。 、 根据权利要求 11所述的业务控制设备， 其中， 所述控制模块还包括：
撤销单元， 设置为当用户应用连接中断或者用户完成应用时， 撤销用户的 内容加速和保障策略和 /或用户的网络加速及质量保障策略。
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