WO2012034397A1

WO2012034397A1 - Method and system for implementing content delivery network interconnection

Info

Publication number: WO2012034397A1
Application number: PCT/CN2011/072623
Authority: WO
Inventors: 吉锋; 阳彦字; 王东
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-09-15
Filing date: 2011-04-11
Publication date: 2012-03-22
Also published as: CN102404294B; CN102404294A

Abstract

The present invention discloses a method and system for implementing Content Delivery Networks (CDNs) interconnection. The system includes a CDN aggregator and interconnection proxy modules set in each CDN system separately; the CDN aggregator is connected with each interconnection proxy module, wherein each interconnection proxy module implements information registration and update of each CDN system by interacting with the CDN aggregator. With the present invention, the interconnection problem of multiple independent CDN systems is solved.

Description

Method and system for realizing CD interconnection

The present invention relates to a content delivery network (CDN) technology in the field of Internet and communications, and more particularly to a method and system for implementing CDN interconnection. Background technique

The full name of the CDN is the Content Delivery Network, the content distribution network. Its purpose is to add the new network architecture to the existing Internet, and publish the content of the website to the "edge" of the network closest to the user, so that the user can be near. Obtain the required content, solve the congestion of the Internet network, improve the response speed of users accessing the website, and comprehensively solve the problem of slow user access due to small network bandwidth, large user access, and uneven distribution of network points.

Currently widely existing CDN systems may not have the same set goals (such as Internet CDN. IPTV CDN), and the services provided and the content they contain are often different. However, usually these CDNs are relatively autonomous and independent. For CDN systems (heterogeneous CDN systems) that provide various services, there is usually no sharing of service content; even for homogeneous CDN systems (CDN systems that provide the same service) If a CDN system's service capacity reaches the upper limit, it will not be able to "borrow" idle service capabilities from other homogeneous CDN systems.

In terms of the cost of actual CDN system construction, usually a CDN system cannot cover all areas and contains limited service content. Therefore, if multiple independent CDN systems providing various service capabilities can be interconnected, a Virtual, larger CDN systems ultimately result in content sharing and sharing of service capabilities, which are positive for both end users and CDN providers. Summary of the invention

In view of this, it is a primary object of the present invention to provide a method and system for implementing CDN interconnection to address interconnection problems between multiple independent CDN systems.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention provides a system for implementing a content distribution network (CDN) interconnection, the system comprising: a CDN aggregator, and an interconnection agent module disposed in each CDN system, the CDN aggregator and each of the Interconnecting agent modules are connected; wherein

Each of the interconnection agent modules performs information registration and update of each of the CDN systems by interacting with the CDN aggregator.

Wherein, the CDN aggregator is configured to perform load sharing between the content sharing between the heterogeneous CDN systems and/or the service capability between the homogeneous CDN systems according to the information registered by the respective CDN systems.

The CDN aggregator includes: an interconnected CDN registration update module and a convergence capability control module, where

The CDN registration update module provides a CDN aggregation interface, performs registration on each CDN system according to registration information submitted by each CDN system through the interconnection proxy module, and executes the corresponding CDN system when the CDN system updates the registration information. Updating the registration information; the aggregation capability control module is configured to perform content sharing and/or homogeneous CDN system between heterogeneous CDN systems according to registration information corresponding to each CDN system saved in the CDN registration update module Load balancing between service capabilities.

The CDN aggregator further includes: a CDN content metadata conversion module configured to perform a conversion mapping operation of unifying the content identification of the registration information, and storing the unified registration information in the CDN registration update module.

The information registered by each CDN system includes at least one of the following:

The identifier of the CDN system, the service content information provided by the CDN system, and the CDN system entry Address, user address distribution information of the CDN system service, and CDN system service capability information. The aggregation capability control module performs content sharing between the heterogeneous CDN systems by using a redirection manner or a proxy mode according to the registration information corresponding to each CDN system saved in the CDN registration update module.

The aggregation capability control module performs load balancing of service capabilities between the homogeneous CDN systems in a redirection manner according to the registration information corresponding to each CDN system saved in the CDN registration update module.

The CDN aggregator is deployed independently of each CDN system or deployed in one of the CDN systems.

The present invention also provides a method of implementing a CDN interconnection, the method comprising:

The CDN aggregator interacts with an interconnection agent module located in each CDN system to perform information registration and update of each of the CDN systems.

The method also includes:

The CDN aggregator performs load balancing between content sharing between heterogeneous CDN systems and/or service capabilities between homogeneous CDN systems based on information registered by respective CDN systems.

The method further includes: the CDN aggregator performing a conversion mapping operation of unifying the content identification of the registration information, and storing the unified registration information.

The identifier of the CDN system, the service content information provided by the CDN system, the CDN system entry address, the user address distribution information of the CDN system service, and the CDN system service capability information.

The method further includes: the CDN aggregator performing content sharing between the heterogeneous CDN systems in a redirection manner or a proxy manner according to the saved registration information corresponding to each CDN system.

The method further includes: the CDN aggregator performing load balancing of service capabilities between the homogeneous CDN systems according to the saved registration information corresponding to each CDN system.

The invention realizes a scheme of CDN interconnection, introduces a CDN aggregator, and is divided into each An interconnection proxy module in the CDN system, the CDN aggregator is connected to each interconnection proxy module; the CDN aggregator interacts with an interconnection proxy module located in each CDN system to perform information registration and update of each CDN system; The interconnection problem between multiple independent CDN systems realizes the content sharing between heterogeneous CDN systems and the load balancing of service capabilities between homogeneous CDN systems, and fundamentally realizes content sharing and services of multiple CDNs. The ability to share, so that more users can provide more content services. DRAWINGS

1 is a schematic structural diagram of implementing interconnection of multiple CDN systems in the present invention;

1 is a schematic view showing the internal structure of a CDN aggregator in the present invention;

3 is a schematic diagram of content sharing between CD systems implemented by a proxy method in a heterogeneous interconnected CDN system according to Embodiment 1 of the present invention;

4 is a schematic diagram of content sharing between CDN systems implemented by a redirection method in a heterogeneous interconnected CDN system according to Embodiment 2 of the present invention;

FIG. 5 is a schematic diagram of implementing user request redirection (capability load balancing) in a homogeneous interconnect CDN system according to Embodiment 3 of the present invention. detailed description

The technical solutions of the present invention are further elaborated below in conjunction with the accompanying drawings and specific embodiments. To achieve interconnection between multiple independent CDN systems, as shown in Figure 1, the present invention introduces a CDN aggregator and introduces an interconnection agent module in each CDN system, the CDN aggregator and each interconnection agent respectively Modules are connected, wherein the interconnection proxy module in each CDN system performs information registration and update of each CDN system by interacting with the CDN aggregator; the CDN aggregator performs content sharing between heterogeneous CDN systems according to information registered by each CDN system. Load balancing of service capabilities between and/or homogeneous CDN systems, thereby providing more content services to more users. The internal structure of the CDN aggregator is as shown in FIG. 2, and mainly includes: an interconnected CDN registration update module and a convergence capability control module.

The CDN registration update module provides a CD aggregation interface for performing registration of each CDN system according to registration information submitted by each CDN system through the interconnection proxy module, and performing registration of the corresponding CDN system when the CDN system updates the registration information. Update of information. The interconnection agent module in the CDN system completes the CDN aggregation process (ie, registration of the CDN system) through the CDN aggregation interface provided by the CDN registration update module. The information registered by the CDN system mainly includes at least one of the following:

An identifier for the CDN system that identifies an independent CDN system;

The service content information provided by the CDN system, for the Internet CDN system, the content information may be a domain name Uniform Resource Locator (URL) identifier of the service content; and for a CDN system such as IPTV, the content information may be a CDN included The content list index information or the URL address information of the server that implements the content location query in the CDN, and the CDN aggregator can perform content query according to the URL;

CDN system entry address, which is the entry address of the user request provided by the CDN system; user address distribution information of the CDN system service, such as: IP address pool information of the CD service user, which can be used to interconnect capacity load balancing between CDN systems Judgments based;

CDN system service capability information, such as: service bandwidth, request concurrency, and other system information. After the initial registration is completed, each CDN system may call the CDN aggregation interface to update the related information as needed. The update operation may be periodically updated or may be updated irregularly. For example, if the content stored in the CDN system changes, The CDN system can invoke the CDN aggregation interface to perform content update operations.

The convergence capability control module performs load balancing between the content sharing of the heterogeneous CDN systems and/or the service capability of the homogeneous CDN system according to the registration information corresponding to each CDN system saved in the CD registration update module. Content sharing between heterogeneous CDN systems can be as follows Implementation mode: Redirection mode or proxy mode; The load balancing of service capabilities between homogeneous CDN systems can be redirected. The specific implementation process will be elaborated in the following.

In addition, for the heterogeneous CDN, since the identification manner of the content in each CDN system may be different, the CDN content metadata conversion module shown in FIG. 2 may be introduced into the CDN aggregator for performing the content of the unified registration information. The conversion mapping operation of the identifier stores the unified registration information in the CDN registration update module to block the difference in the manner of identifying the registered CDN content.

The system implementation functions shown in the above Figures 1 and 2 will be further elaborated below in conjunction with the specific embodiments.

As shown in FIG. 3, FIG. 3 is a schematic diagram of content sharing between CDN systems based on proxy mode in a heterogeneous interconnected CDN system according to Embodiment 1 of the present invention, and the operation of implementing content sharing between CDN systems mainly includes the following steps:

Step 301: The user of the CDN1 requests a certain content from the CDN1.

Step 302, the routing system module of the CDN1 finds that the requested content does not exist (the discovery process may need to interact with other modules (such as the content management module)), and the CDN is interconnected by the interconnecting proxy module (the module is pre-registered in the CDN aggregator) The aggregator requests to query other CDN systems for the corresponding content.

It should be noted that in the actual application, it is necessary to ensure that the content identifiers in the CDNs are consistent, so as to perform the query of the shared content, there are various possible implementation manners, for example, when the CDN is registered, the content is uniformly labeled; or, The conversion mapping operation of the unified CDN content identification in the CDN aggregator, that is, the function implemented by the CDN content metadata conversion module in FIG.

Step 303: The CDN aggregator finds that the CDN2 provides the corresponding content by querying the registration information of each CDN system (calling the content query address provided by each CD system), thereby returning the entry address information of the routing system of the CDN2 to the CDN1 through the routing system module of the CDN1. .

Step 304, the two routing system modules in the CDN1 and CDN2 systems interact, CDN 1 The routing system module obtains the corresponding content to the CDN node 2-1 in the CDN2.

Step 305, the CDN1 allocates the CDN node 1-1 to prepare to provide services for the user, and notifies the CDN node 1-1 to the CDN node 2-2 in the CDN2 to acquire the content.

Step 306, the CDN node 1-1 serves the user with a proxy mode that pulls the edge service from the CDN node 2-2. The so-called edge-pull service is the way of pulling and pulling, that is, the CDN node 1-1 finds that there is no content at present, and pulls the content from the CDN node 2-2 in real time, while pulling and providing services for the user, the CDN node 1-1 is similar. On a relay or proxy (Proxy).

As shown in FIG. 4, FIG. 4 is a schematic diagram of content sharing between CDN systems based on a redirection method in a heterogeneous interconnected CDN system according to Embodiment 2 of the present invention. The operation of realizing content sharing between CDN systems mainly includes the following steps:

Step 401: The user of the CDN1 requests a certain content from the CDN1.

Step 402: The routing system module of CDN1 finds that the requested content does not exist (the discovery process may need to interact with other modules (such as a content management module)), and the CDN is interconnected by the interconnecting proxy module (the module is pre-registered in the CDN aggregator) The aggregator requests to query other CDN systems for the corresponding content.

Step 403: The CDN aggregator finds that the CDN2 provides the corresponding content by querying the registration information of each CDN system (calling the content query address provided by each CDN system), thereby returning the entry address information of the routing system of the CDN2 to the user through the routing system module of the CDN1. And instruct the user to redirect directly to the CDN2 system to obtain content.

Step 404: The user accesses the routing system of the CDN2 in a redirected manner, and the routing system of the CDN2 obtains the corresponding content of the CDN node 2-1 in the CDN2, and allocates the CDN node 2-1 to provide services for the user.

As shown in FIG. 5, a schematic diagram of realizing user request redirection (capability load balancing) in a homogeneous interconnect CDN system according to Embodiment 3 of the present invention, two Internet CDN (Web CDN1 and Web CDN2) systems are websites www. Example.com provides caching services, when Web CD 1 is When the service capability of the system is insufficient, some user requests can be redirected to the interconnected Web CDN2 system through the CDN aggregator. The operation of the load balancing between CDN systems mainly includes the following steps:

Step 501: The user requests a webpage service of www.example.com.

Step 502: The local domain name system (DNS) server of the user requests the CDN aggregator to perform load balancing.

Step 503, in general, the CDN aggregator will point the user request to the Web CDN1 system. However, the CDN aggregator finds that the Web CDN1 system is insufficient (the CDN service of the Web CD 1 system is stored in the CDN registration update module of the CDN aggregator). Capability information), choose to redirect the user to a Web CDN2 system that provides the same service and has the ability to idle.

Step 504: Inside the Web CDN2 system, the operation is performed according to the traditional Internet CDN redirection process, and the user request is finally redirected to an edge node of the Web CDN2 system.

It should be noted that the CDN aggregator in the present invention can be deployed in the network as a device independent of each CDN system, as shown in FIG. 3 and FIG. 4, or in a CDN system, as shown in FIG. 5. Shown. Regardless of the deployment method, the implementation of the CDN aggregator is the same.

In summary, the present invention solves the interconnection problem between multiple independent CDN systems, realizes content sharing between heterogeneous CDN systems and load balancing of service capabilities between homogeneous CDN systems, and fundamentally Realize the sharing of content and service capabilities of multiple CDNs, so as to provide more content services for more users.

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

Claims

Claim

What is claimed is: 1. A system for implementing a content distribution network (CDN) interconnection, the system comprising: a CDN aggregator, and an interconnection agent module disposed in each CDN system, the CDN aggregator and each of the interconnections Agent modules are connected;

Each of the interconnection agent modules performs information registration and update of each of the CD systems by interacting with the CDN aggregator.

2. A system for implementing CDN interconnection according to claim 1, wherein said CDN aggregator is arranged to perform content sharing between heterogeneous CDN systems and/or isomorphic CDN systems based on information registered by respective CDN systems. Load balancing of service capabilities.

The system for implementing a CDN interconnection according to claim 2, wherein the CDN aggregator comprises: a CDN registration update module and an aggregation capability control module, wherein the CDN registration update module provides a CDN aggregation interface, Performing registration of each CDN system according to registration information submitted by each CDN system through the interconnection proxy module, and performing update of registration information corresponding to the CDN system when the CDN system updates the registration information; the convergence capability control And a module configured to perform load balancing between the content sharing between the heterogeneous CDN systems and/or the service capability between the homogeneous CDN systems according to the registration information corresponding to each CDN system saved in the CDN registration update module.

4. The system for implementing a CDN interconnection according to claim 3, wherein the CDN aggregator further comprises: a CDN content metadata conversion module configured to perform a conversion mapping operation of unifying the content identification of the registration information, and The unified registration information is stored in the CDN registration update module.

The system for implementing CDN interconnection according to any one of claims 1 to 4, wherein the information registered by each of the CDN systems comprises at least one of the following:

The system for implementing CDN interconnection according to any one of claims 1 to 4, wherein the aggregation capability control module adopts a redirection manner according to registration information corresponding to each CDN system saved in the CDN registration update module. Or proxy mode to perform content sharing between heterogeneous CDN systems.

The system for implementing CDN interconnection according to any one of claims 1 to 4, wherein the aggregation capability control module uses a redirection according to registration information corresponding to each CDN system saved in the CDN registration update module. The mode performs load balancing of service capabilities between homogeneous CDN systems.

The system for implementing CDN interconnection according to any one of claims 1 to 4, wherein the CDN aggregator is deployed independently of each CDN system or in one of the CDN systems.

9. A method of implementing a CDN interconnect, the method comprising:

10. A method of implementing a CDN interconnection according to claim 9, wherein the method further comprises: said CDN aggregator performing content sharing and/or isomorphic CDN between heterogeneous CDN systems based on information registered by respective CDN systems Load balancing of service capabilities between systems.

The method for implementing a CDN interconnection according to claim 10, wherein the method further comprises: the CDN aggregator performing a conversion mapping operation of unifying the content identification of the registration information, and storing the unified registration information .

12. The method of implementing CDN interconnection according to claim 9, 10 or 11, wherein the information registered by each of the CDN systems comprises at least one of the following:

13. A method of implementing a CDN interconnection according to claim 9, 10 or 11, wherein The method further includes: the CDN aggregator performing content sharing between the heterogeneous CDN systems by using a redirection manner or a proxy mode according to the saved registration information corresponding to each CDN system.

The method for implementing a CDN interconnection according to claim 9, 10 or 11, wherein the method further comprises: the CDN aggregator performing the isomorphic CDN in a redirection manner according to the saved registration information corresponding to each CDN system. Load balancing of service capabilities between systems.