WO2014056402A1

WO2014056402A1 - Method and device for realizing internet service based on convergence of cdn and network

Info

Publication number: WO2014056402A1
Application number: PCT/CN2013/084368
Authority: WO
Inventors: 黄孙亮; 陈建业; 范成法; 李宏飚
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-10-12
Filing date: 2013-09-26
Publication date: 2014-04-17
Also published as: CN102917042B; CN102917042A

Abstract

Disclosed are a method and device for realizing internet services based on convergence of CDN and a network, the method of the present invention comprising: acquiring and returning a domain name system (DNS) parsing result to a user terminal according to a DNS parsing request initiated by the user terminal, the DNS parsing result containing the service address of a convergence device CDN content delivery node providing service for the user terminal initiating the DNS parsing request; the user terminal utilizes the acquired service address of the convergence device CDN content delivery node to initiate an application access request, so as to establish an application link with a convergence device CDN component functioning as a convergence device CDN content delivery node; after the link between the user terminal and the convergence device CDN component is established, the convergence device CDN component delivers corresponding content to the user terminal according to the content request of the user terminal. The present invention can effectively guarantee the quality of service of an internet service, optimize network bandwidth, and reduce the bandwidth consumption of a backbone network, thus reducing network investment cost.

Description

Method and device for realizing internet service based on CDN and network convergence

The present invention relates to a communication network and a content distribution network (CDN), and more particularly to a method and apparatus for implementing Internet services based on CDN and network convergence. Background technique

The rapid development of Internet services, especially the development of video services, has made service providers need a large number of CDN services to improve the service quality of Internet services; it has brought about the large-scale development of CDN; but because the current CDN system cannot sense and control the network. The bandwidth and quality, so can not really guarantee the user experience of the Internet business.

The quality of service guarantee for Internet services needs to be protected from both content and network. CDN and network equipment are required to protect users' Internet applications at the same time. However, the current technical solutions can only achieve partial effects. The CDN can only provide application-level protection. The network can only provide bandwidth and quality assurance at the network layer. Therefore, there is an urgent need for a new type of equipment and new technical solutions to achieve quality assurance of Internet services. Summary of the invention

It is an object of the present invention to provide a method and apparatus for implementing Internet services based on CDN and network convergence, which implements Internet services by merging CDNs with network devices.

A method for implementing an Internet service based on a content distribution network CDN and network convergence, including:

Obtaining and returning a DNS resolution result to the client according to the domain name system DNS resolution request initiated by the user end, where the DNS resolution result includes the user end for initiating the DNS resolution request The service address of the CDN content distribution node of the converged device for service;

The client initiates an application access request by using the obtained service address of the fusion device CDN content distribution node, and establishes an application link with the CDN component of the fusion device as the content distribution node of the fusion device CDN;

After the client establishes an application link with the Fusion Device CDN component, the Fusion Device CDN component distributes the corresponding content to the client according to the content request of the client.

The converged device further includes a network component, wherein the network component is configured to provide network access and bearer services to the user, and the CDN component is further configured to maintain an application link with the client.

The obtaining and returning the DNS resolution result to the client includes:

The local DNS resolution server queries the local cache record according to the received user DNS resolution request, and returns the corresponding cached record as a parsing result to the client.

The obtaining and returning the DNS resolution result to the client further includes:

If the local DNS resolution server does not query the corresponding cache result, the DNS resolution request of the CDN central management system is obtained by initiating a DNS resolution request to the DNS server authorized by the ISP; the local DNS resolution server uses the DNS information of the CDN central management system to the CDN. The DNS server of the central management system initiates a DNS resolution request to obtain the fusion device

The result of parsing the service address of the CDN content distribution node, and then returning it to the client.

The request for initiating a DNS resolution by the DNS server authorized by the ISP includes: The local DNS resolution server obtains the authorized DNS server information of the ISP by sending a query request to the root DNS server, so that the local DNS resolution server utilizes the authorized DNS of the ISP. Server information, initiates a DNS resolution request to the ISP's authorized DNS server.

The CDN component of the fusion device distributes the corresponding content to the client according to the content request of the user end, including:

The Fusion Device CDN component queries the local cache, and if it finds the corresponding content, it will cache locally. The corresponding content is distributed to the client.

The CDN component of the fusion device distributes the corresponding content to the client according to the content request of the user end, and further includes

If the corresponding content is not found, the Fusion Device CDN component obtains the corresponding content by sending a content request to the source application server or the superior CDN node or the central CDN node;

The converged device CDN component caches the obtained content and distributes it to the client. An apparatus for implementing an Internet service based on CDN and network convergence, comprising:

The DNS resolution network device is configured to obtain and return a DNS resolution result according to the DNS resolution request initiated by the user end, where the DNS resolution result includes a service address of the CDN content distribution node of the fusion device that provides the service for the client that initiates the DNS resolution request. ;

The CDN component of the converged device is configured to, after the user end initiates an application access request by using the obtained service address of the converged device CDN content distribution node, the CDN content distribution node establishes an application link with the user end, and then requests according to the content of the user end. Distribute the content to the client.

An internal signaling interaction interface is provided between the network component of the fusion device and the CDN component, so that the network component sends information to the user address pool on the CDN component, and the CDN component applies to the network component for acceleration, reception, and execution of feedback information of the user network. , user status query and feedback information.

On the other hand, the fusion of the CDN and the network device of the present invention includes the following: merging the content distribution node of the CDN system with the network device, as a component of the network device, the CDN component and the network component are loosely coupled;

Converged device CDN components are equivalent to external independent CDN nodes, and can be independent of external CDN Nodes can interact with each other at the same level, clustering, and collaboration. It can also form a multi-level structure with external independent CDN nodes to meet the networking and service service requirements in different scenarios.

The CDN's central management system retains centralized deployment, unified management and monitoring of CDN components of each converged device (and can also manage external CDN nodes); in addition, the GSLB of the CDN system,

The components such as the DNS resolution are also deployed in a unified manner with the central management system. In addition, the system can be integrated and deployed with the network management system of the converged device.

The CDN component provides the user with a CDN service and maintains the user's content service status; the network component provides network access and bearer services to the user, and maintains the user's network service status;

The CDN component adds an internal interface to interact with the network component; the CDN component can trigger to apply for or revoke the corresponding network acceleration and security policy to the network component based on the user state information maintained by itself, according to the change of the user application state, and also according to the The application status of the user applies for or revokes the corresponding content acceleration and security policy; thus, the protection can be implemented simultaneously from both the application service and the network service, thereby improving the user experience.

Compared with the prior art, the technical effect of the present invention is that the convergence of the device and the Internet service bearer implemented on the device can effectively guarantee the service quality of the Internet service and improve the user experience; at the same time, the network bandwidth can be optimized, and the backbone network can be reduced. Bandwidth consumption reduces network investment costs. DRAWINGS

1 is a network diagram of a system for a CDN and a network convergence device according to the present invention;

2 is an internal structural diagram of a CDN and a network convergence device according to the present invention;

3 is a schematic diagram of a method for implementing an Internet service based on CDN and network convergence according to the present invention;

4 is a schematic diagram of an apparatus for implementing an Internet service based on CDN and network convergence according to the present invention; 5 is a flowchart of a first embodiment of implementing an Internet service based on CDN and network convergence according to the present invention;

Figure 6 is a flow diagram of a second embodiment of an Internet service based on CDN and network convergence of the present invention. detailed description

The CDN (Content Distribution Network) and network convergence system and device according to the embodiment of the present invention and the Internet service implementation method based on the CDN and the network convergence device will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a network diagram of a system for a CDN and a network convergence device in an embodiment of the present invention. From the system point of view, CDN and network convergence equipment can be deployed in a distributed manner, but a central management system is required to implement unified management and scheduling, implement unified content management, service monitoring, network management, DNS resolution, resource scheduling and load balancing. Wait;

The CDN component in the converged device is equivalent to a CDN node. It can interact with external CDN nodes, cooperate, network, form a cluster system, and form a multi-level CDN networking structure to meet the needs of different scenarios.

The CDN's central management system is deployed in a centralized manner, and is deployed in conjunction with the DNS server, resource scheduling and load balancing system (GSLB) to manage and maintain CDN components in the regional CDN and network convergence equipment, as well as external CDN nodes. , service adaptation, and resource scheduling; can be deployed as an independent system, or can be integrated with the network management system of the converged device. As part of the network management system, it is deployed in a unified manner with the network management system.

Converged devices, which combine CDN functions and network functions, use CDN components as content distribution nodes to provide users with content distribution services; and use network components to provide users with network access and bearer services.

The CDN component and the CDN's central management system establish management channels and service channels, and adopt management channels to realize daily maintenance and management of the network, monitoring of equipment, etc.; Disbursement, interaction of business information, etc.;

From the group network, the CDN can be integrated with the core routers, service routers (BRAS/SR), switches, PDSN/GGSN devices on the network. Due to the BRAS/SR, the PDSN/GGSN is the service control point of the Internet user. It has the network status information of the user. It is recommended that the CDN device and the BRAS/SR and PDSN/GGSN devices be fused to achieve the cooperation between the CDN user status and the network user status. The collaboration of user states can achieve a double guarantee based on the user's application content and network quality, thereby improving the user experience.

Fig. 2 is a view showing a general internal structure of a CDN and a network fusion device in the embodiment of the present invention. In the embodiment of the present invention, a CDN and a network-integrated device combine a CDN content distribution node and a network device, and adopt a loosely coupled manner for fusion. The CDN component adopts an independent CDN service processing board type, and the network component is also independent. The network service processing board form; thus greatly reducing the complexity of the fusion, and also improving the scalability and flexibility of the system. Network components or CDN components can be expanded to meet specific business needs.

The CDN component provides an application content distribution service for the user, and provides a corresponding content state machine for the user while providing the service, and records the state of the user content service, thereby facilitating the user-based refined operation. CDN components can implement content acceleration and assurance policies for users.

The network component provides the network access and bearer services for the user, maintains the corresponding network state machine for the user while providing the service, records the network service status of the user, and facilitates the refined operation based on the user. Network components can implement network acceleration and assurance policies for users.

In order to realize the cooperation between the CDN component and the network component, the internal signaling interaction interface between the CDN component and the network component is added; the interaction information includes: the network component reports the user address pool to the CDN component, and the CDN component applies the user network acceleration to the network component and Receiving execution feedback information, user status query and feedback, etc.; coordination of status information and adjustment of service policies can better protect the user experience.

FIG. 3 shows an implementation of an embodiment of the present invention based on the CDN and network shown in FIGS. 1 and 2. The method of integrating the Internet business, as shown in Figure 3, includes:

Step A: The DNS resolution network device obtains and returns a DNS resolution result to the client according to the DNS (Domain Name System) resolution request initiated by the client, where the DNS resolution result includes a fusion device that provides a service for the client that initiates the DNS resolution request. The service address of the CDN content distribution node;

Step B: The UE uses the obtained service address of the Fusion Device CDN content distribution node to initiate an application access request, and establishes an application link with the Fusion Device CDN component as the Fusion Device CDN content distribution node.

Step C: After the user end establishes an application link with the fusion device CDN component, the fusion device CDN component distributes the corresponding content to the client according to the content request of the client.

The above DNS resolution network device may include a local DNS resolution server, a superior DNS resolution server, a root DNS resolution server, an ISP authorized DNS resolution server, and a CDN center DNS resolution server. The above-mentioned converged device includes the network component and the CDN component shown in FIG. 2, the network component is configured to provide network access and bearer services to the client, and the CDN component is further configured to maintain an application link with the client.

The operation of obtaining and returning the DNS resolution result to the client in step A includes: the local DNS resolution server queries the local cache record according to the received user DNS resolution request, and returns the queried corresponding cache record as a parsing result directly to the user. end.

The obtaining and returning the DNS resolution result to the client in the step A further includes: if the local DNS resolution server does not query the corresponding cache result, the DNS resolution request is initiated by the DNS server authorized by the ISP, and the CDN central management system is obtained. DNS information; then, the local DNS resolution server initiates a DNS resolution request to the DNS server of the CDN central management system by using the DNS information of the CDN central management system, and obtains an analysis result of the service address of the CDN content distribution node of the fusion device, and then It is returned to the client.

The operation of initiating a DNS resolution request by the DNS server authorized by the ISP includes: The local DNS resolution server obtains the authorized DNS server information of the ISP by sending a query request to the root DNS server, so that the local DNS resolution server uses the authorized DNS server information of the ISP to initiate a DNS resolution request to the authorized DNS server of the ISP.

The operation of the converged device CDN component to distribute the corresponding content to the client according to the content request of the user terminal includes: the converged device CDN component queries the local cache, and if the corresponding content is found, distributes the corresponding content of the local cache to the client.

The distributing device CDN component distributing the corresponding content to the client according to the content request of the user terminal further includes: if the corresponding content is not found, the fusion device CDN component sends the content request to the source application server, or sends the content by sending the content to the upper CDN node or the central node. Requesting, obtaining the corresponding content; the converged device CDN component caches the obtained content and distributes it to the client.

FIG. 4 shows an apparatus for implementing an Internet service based on CDN and network convergence according to an embodiment of the present invention. As shown in FIG. 4, the method includes:

The CDN component of the converged device is configured to establish an application link with the user end as a fusion device CDN content distribution node after the user end initiates an application access request by using the obtained service address of the converged device CDN content distribution node, and then according to the content request of the user end Distribute the content to the client.

As shown in FIG. 4, the apparatus of the embodiment of the present invention may further include a CDN central management system configured to provide an analysis result of a service address of the CDN content distribution node of the fusion device during a DNS resolution request initiated by the user.

As described above, the converged device includes a network component and a CDN component, the network component is configured to provide network access and bearer services to the client, and the CDN component is further configured to maintain an application link with the client. Wherein, there is an internal signaling interaction between the network component of the fusion device and the CDN component The interface, so that the network component sends information to the user address pool to the CDN component, and the CDN component applies to the network component for user network acceleration, reception and execution of feedback information, user status query and feedback information.

The present invention will be further described below in conjunction with two embodiments of the CDN and network convergence based Internet service implementation of the present invention illustrated in Figures 5 and 6.

Fig. 5 shows the processing flow of the first embodiment of the Internet service implementation based on CDN and network convergence of the present invention. In this embodiment, the systems involved mainly include: user client, CDN and network convergence device, local DNS resolution server (you can choose to open DNS server on the fusion device), DNS server of the CDN central system and global load balancing system (below Referred to as CDN's DNS/GSLB), DNS root server, ISP authorized DNS server, and application server.

The business implementation steps are as follows:

1. The user needs to access the Internet application to initiate a DNS resolution request;

2. The local DNS resolution server receives the user's DNS resolution request and queries the local cache. If there is a corresponding cache record, it returns directly to the user; if there is no corresponding cache record, the upper-level DNS server requests, until the DNS root server ;

3. The DNS root server receives the query request, performs a database query, finds the corresponding ISP authorized DNS server information, and returns the authorized DNS server information of the ISP to the local DNS resolution server;

4. The local DNS resolution server receives the feedback information of the DNS root server, and according to the ISP authorized DNS server information in the information, initiates a DNS query request to the ISP authorized DNS server;

5. The ISP's authorized DNS server receives the DNS query request. Since the ISP adopts the CDN service, the application determines that the application uses the CDN to provide the service according to the scheduling policy, and returns the DNS corresponding to the CDN to the local DNS resolution server according to the set scheduling policy. server information;

6. The local DNS resolution server receives the message returned by the ISP authorized DNS server, according to The DNS server information of the CDN system inside, sends a query request to the DNS server of the CDN system;

7. The DNS/GSLB of the CDN receives the DNS query request, and determines the CDN content distribution node (this node is the CDN node controlled by the fusion device) serving the user according to the user information and the corresponding scheduling policy, to the local DNS. The resolution server returns service address information of the CDN content distribution node;

8. The local DNS resolution server obtains the DNS resolution result, and feeds back the query result information to the user client, where the information includes the service address of the CDN content distribution node that provides the service, and the CDN service point and the service address are on the fusion device, which is a fusion device. CDN external service address;

9. The user client obtains the application service address, initiates an application access request, establishes an application link with the fusion device CDN service address, and requests the corresponding service content;

10. The CDN component of the converged device establishes an application link with the user client to receive the content access request; queries the local cache according to the content request of the user, and directly distributes the content to the user if there is a corresponding cache; if there is no corresponding cache, it is required First obtain from the source station;

11. The application server of the source station receives the CDN content request of the fusion device, and returns the content corresponding to the request;

12. The CDN component of the converged device receives the content returned by the source station application server, performs local caching according to the policy, and distributes to the user;

According to the application situation of the user, the CDN component of the converged device maintains an application link with the user, and continuously provides a content distribution service;

13. The user application access ends, the link is closed, the CDN component of the converged device is closed, and the user's application link is cleared, the user content status is cleared, and the corresponding resource is released.

Fig. 6 shows the processing flow of the second embodiment of the Internet service implementation based on CDN and network convergence of the present invention.

This embodiment is for a field where CDN service providers need better control and review of content. The CDN service provider uses the CDN central node to fully store the contents of the ISP and update and review the release in real time. The specific steps of this embodiment are as follows:

6. The local DNS resolution server receives the message returned by the ISP authorization DNS server, and sends a query request to the DNS server of the CDN system according to the DNS server information of the CDN system therein;

8. The local DNS resolution server obtains the DNS resolution result, and feeds back the query result information to the user client, where the information includes the service address of the CDN content distribution node that provides the service, and the CDN service point and the service address are on the fusion device, which is a fusion device. CDN external service address; 9. The user client obtains the application service address, initiates an application access request, establishes an application link with the converged device CDN service address, and requests the corresponding service content;

10. The CDN component of the converged device establishes an application link with the user client to receive the content access request; queries the local cache according to the content request of the user, and directly distributes the content to the user if there is a corresponding cache; if there is no corresponding cache, it is required First obtain the upper CDN node/CDN central node;

11. The CDN node/CDN central node receives the CDN content request of the fusion device, and returns the content corresponding to the request;

12. The CDN component of the converged device receives the content returned by the superior CDN node/CDN central node, performs local caching according to the policy, and distributes to the user;

The above characteristics of the Internet service implementation method based on CDN and network convergence are mainly embodied in CDN and network convergence equipment. By combining the CDN content distribution function and the network service function, the same user's network connection and application layer link are implemented. They are all placed on network devices to better coordinate and make it easier to guarantee the quality of service for Internet services.

The embodiment of the invention integrates the network device and the CDN device into a new type of device, and adopts a loosely coupled fusion mode, which is easier to deploy and expand. The CDN component and the network component respectively maintain the user's content state machine and network state machine, and increase the internal interaction interface between the CDN component and the network component to achieve state cooperation, and have the basis of user-based refined operation and service guarantee. . On this basis, the implementation method of the Internet service is provided. The CDN and the network convergence device carry the Internet application, and the application layer link and the network layer connection of the Internet application are all on the fusion device, which can achieve better coordination and cooperation. For Internet applications For high quality service guarantee.

Specifically, the apparatus for implementing the Internet service based on CDN and network convergence according to the embodiment of the present invention has the following features:

1) The network convergence device of the embodiment of the present invention combines the network and the CDN function, and the network component and the CDN component are loosely coupled to realize the device level fusion.

2) Both the network component and the CDN component have their own user state machine, and the state machines of the two are independent of each other.

3) The network component and the CDN component respectively maintain the user's network state machine and content state machine, which facilitates user-based refined operation and service guarantee.

4) The interaction between the network component and the CDN component through the internal system interface and the message interface enables the network capability and the CDN content service capability to have synergistic capabilities.

5) The CDN component is managed by a unified CDN central manager, and the CDN central manager can be independently configured, and can also be incorporated into the network management system of the fusion device of the embodiment of the present invention as an integral part of the network management system;

6) The system's GSLB, DNS and CDN central management systems are integrated and deployed in a unified manner, which can be deployed in a centralized manner.

7) The Internet service implementation method is based on a new type of device that combines CDN and network. The CDN and the network convergence device establish an application link with the user to provide services.

8) The Internet service implementation method is based on CDN and network convergence equipment, so that the user's network connection and application layer link are all on the network device, which makes it easier to realize the cooperation between the application and the network, and better guarantee the service quality of the Internet service;

9) The CDN component of the converged device can interact with external independent CDN nodes, form a network, form a cluster, and form a multi-level CDN structure to meet the CDN networking requirements of different scenarios.

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

Claims

claims

1. A method to implement Internet services based on content distribution network CDN and network integration, including:

According to the domain name system DNS resolution request initiated by the user end, obtain and return the DNS resolution result to the user end, where the DNS resolution result contains the service address of the converged device CDN content distribution node that provides services for the user end that initiated the DNS resolution request;

The user terminal uses the obtained service address of the convergence device CDN content distribution node to initiate an application access request and establish an application link with the convergence device CDN component as the convergence device CDN content distribution node;

After the user terminal establishes an application link with the fusion device CDN component, the fusion device CDN component distributes corresponding content to the user terminal according to the user terminal's content request.

2. The method according to claim 1, wherein the convergence device further includes a network component, wherein the network component is configured to provide network access and bearer services to users, and the CDN component is also configured to maintain communication with users. Application links between terminals.

3. The method according to claim 1, wherein the obtaining and returning the DNS resolution result to the user includes:

The local DNS resolution server queries the local cache record based on the received user DNS resolution request, and directly returns the queried corresponding cache record to the user as the resolution result.

4. The method according to claim 3, wherein the obtaining and returning the DNS resolution result to the user further includes:

If the local DNS resolution server does not query the corresponding cached result, it will initiate a DNS resolution request to the DNS server authorized by the ISP to obtain the DNS information of the CDN center management system; the local DNS resolution server will use the DNS information of the CDN center management system to obtain the DNS information from the CDN center management system. The DNS server of the central management system initiates a DNS resolution request, obtains a resolution result containing the service address of the converged device CDN content distribution node, and then returns it to the user.

5. The method according to claim 4, wherein the initiating a DNS resolution request through a DNS server authorized by the ISP includes:

The local DNS resolution server obtains the ISP's authorized DNS server information by sending a query request to the root DNS server, so that the local DNS resolution server uses the ISP's authorized DNS server information to initiate a DNS resolution request to the ISP's authorized DNS server.

6. The method according to any one of claims 3 to 5, wherein the CDN component of the fusion device distributes corresponding content to the user terminal according to the user terminal's content request, including:

The CDN component of the fusion device queries the local cache. If the corresponding content is found, the corresponding content in the local cache is distributed to the client.

7. The method according to claim 6, wherein the fusion device CDN component further includes: distributing corresponding content to the user end according to the user end's content request.

If the corresponding content is not found, the fusion device CDN component obtains the corresponding content by sending a content request to the source application server or upper-level CDN node or central CDN node;

The CDN component of the fusion device caches the obtained corresponding content and distributes it to the client.

8. A device for realizing Internet services based on CDN and network integration, including:

A DNS resolution network device configured to obtain and return a DNS resolution result based on a DNS resolution request initiated by a user, where the DNS resolution result contains the service address of a converged device CDN content distribution node that provides services for the client that initiated the DNS resolution request. ;

The CDN component of the convergence device is configured to establish an application link with the user end as the convergence device CDN content distribution node after the user initiates an application access request using the obtained service address of the convergence device CDN content distribution node, and then based on the user end's content request Distribute the corresponding content to the client.

9. The device according to claim 8, wherein the convergence device further includes a network component, wherein the network component is configured to provide network access and bearer services to users, and the CDN component is further configured to maintain communication with users. Application links between terminals.

10. The device according to claim 9, wherein an internal signaling interaction interface is provided between the network component and the CDN component of the convergence device, so that the network component reports the information of the user address pool to the CDN component, and the CDN component reports the user address pool information to the network component. The components apply for user network speed, receive and execute feedback information, user status query and feedback information.