WO2014071802A1

WO2014071802A1 - User positioning method and device based on content delivery network (cdn) and network convergence

Info

Publication number: WO2014071802A1
Application number: PCT/CN2013/085825
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: 2012-11-06
Filing date: 2013-10-23
Publication date: 2014-05-15
Also published as: CN102970351B; CN102970351A

Abstract

Disclosed are a user positioning method and device based on a CDN and network convergence. The method comprises forming a fused device through fusing a CDN node of a CDN system with a network device, wherein the fused device comprises a CDN component and a network component and is deployed with a local domain name system (DNS) server; generating a DNS record containing a domain name of a signed internet content provider (ICP)/internet service provider (ISP) and taking an external service address of the CDN component of the fused device as the address corresponding to the domain name, and/or generating an address relation record containing an address of the local DNS server and the corresponding relation of the external service address of the CDN component of the fused device; and obtaining DNS analysis results for being returned to a user by using the DNS record or the address relation record when the user initiates a DNS analysis request, and therefore, the user builds application links according to the analysis results and the CDN component of the fused device, and the user positioning from the user to the CDN component of the fused device is achieved.

Description

Method and device for user positioning based on CDN and network fusion

The present invention relates to a communication network, a CDN (Content Delivery Network), a service management system, a related system of a content provider, a DNS system, and the like, and more specifically, relates to a new type of device in which a CDN and a network are integrated. When carrying, the system locates the user and the device, and selects a suitable service node for the user. 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. CDN can only provide application-level protection, and the network can only provide bandwidth and quality assurance at the network layer. Only CDN devices and network devices can be fused to implement protection from both content and network, thereby enhancing the user experience.

After the CDN and the network device are merged, the user needs to be located in the specific service bearer, and the resources are scheduled. Each user needs to be allocated corresponding resources, corresponding service nodes, and in principle, the user's content service node and network. The service nodes are on the same device to achieve better synergy and maximize the advantages of the converged device. However, there is currently no technical solution to meet the above requirements. Summary of the invention

An object of the embodiments of the present invention is to provide a user positioning based on CDN and network device convergence. The method achieves user positioning by merging the CDN with the network.

Another object of embodiments of the present invention is to provide an apparatus for implementing the above method.

A user positioning method based on a content distribution network CDN and network convergence according to an embodiment of the present invention includes the following steps:

The fusion device is formed by merging the CDN node of the CDN system with the network device, where the fusion device includes a CDN component and a network component, and a local DNS server is deployed on the fusion device;

Generating a DNS record containing the contracted ICP/ISP domain name and the external service address of the CDN component of the converged device as the address corresponding to the domain name, and/or generating an address relationship record including the correspondence between the local DNS server address and the external service address of the CDN component of the converged device;

When the user initiates the DNS resolution request, the DNS record or the address relationship record is used to obtain a DNS resolution result for returning to the client, where the user establishes an application with the CDN component of the fusion device according to the DNS resolution result. Link, user positioning of the client to the CDN component of the fusion device.

Preferably, the network component is configured to provide network access and bearer services to the UE, and the converged device further includes a main control unit for serving the CDN component and the network component.

Preferably, the generating the DNS record comprises: the CDN central management system issuing an instruction including the contracted ICP/ISP domain name information to the converged device CDN component; and the converged device CDN component requesting the local DNS server to sign the contract according to the domain name information in the instruction The ICP/ISP domain name generates the DNS record; wherein the domain name in the DNS record is the contracted ICP/ISP domain name, and the corresponding address is the external service address of the converged device CDN component.

Preferably, the obtaining the DNS resolution result by using the DNS record comprises: the local DNS server querying the locally cached DNS record according to the received DNS resolution request, and querying the DNS record corresponding to the contracted ICP/ISP domain name. The Fusion Device CDN component returns the external service address to the client.

Preferably, the generating the address relationship record comprises: a converged device network component or a master control ticket Notifying the address of the local DNS server to the converged device CDN component; the converged device CDN component generates an address relationship record for the correspondence between the local DNS server address and the external service address of the converged device CDN component according to the message in the advertisement, and It is reported to the CDN Central Management System's Domain Name System Resource Scheduling and Load Balancing System DNS GSLB.

Preferably, the obtaining the DNS resolution result by using the address relationship record comprises: sending, by the local DNS server, a DNS resolution request to the DNS GSLB; the DNS GSLB querying the corresponding domain name in the domain name record according to the DNS resolution request After querying the corresponding domain name, according to the correspondence between the local DNS server address in the address relationship record and the external service address of the converged device CDN component, the corresponding converged device CDN component is determined as a CDN service node, and will contain its address. The parsing result is returned to the client via the local DNS server.

Preferably, the obtaining the DNS resolution result by using the address relationship record comprises: sending, by the local DNS server, a DNS resolution request to the DNS root server, and initiating the DNS server according to the ICP/ISP authorized DNS information returned by the ICP/ISP. a DNS query request; the local DNS server initiates a DNS query request to the DNS GSLB according to the DNS information of the used CDN service system returned by the ICP/ISP authorized DNS server in response to the query request; the DNS GSLB queries according to the DNS query request Corresponding DNS records, and according to the correspondence between the local DNS server address in the address relationship record and the external service address of the converged device CDN component, the corresponding converged device CDN component is determined as a CDN service node, and the parsing result containing the address is determined via The local DNS server is returned to the client.

A user positioning device based on the CDN and the network convergence of the embodiment of the present invention includes: a DNS record generating unit of the fusion device, configured to generate a contracted ICP/ISP domain name and use the external service address of the CDN component of the fusion device as the corresponding address of the domain name. a DNS record, or an address relationship record containing a correspondence between a local DNS server address and an external service address of the Fusion Device CDN component;

The DNS resolution device is configured to use the DNS record or the address relationship record to obtain a DNS resolution result for returning to the client when the user initiates a DNS resolution request. The user end establishes an application link with the CDN component of the fusion device according to the parsing result, and implements user positioning of the user end to the CDN component of the fusion device;

The converged device is a device that combines a CDN node and a network device, and includes: the local DNS server; and the CDN component of the converged device, used to establish and maintain an application link with the client, and provide content distribution. service.

Preferably, the converging device further includes a network component configured to provide network access and bearer services to the UE; wherein, the network component of the converged device and the CDN component are provided with an internal signaling interaction interface for the network component The information of the user address pool is reported to the CDN component, and the CDN component applies to the network component for information about the user network acceleration, receiving and executing feedback information, user status query, and feedback.

Preferably, the merging device further includes: a main control unit configured to serve the CDN component and the network component; wherein the main control unit and the CDN component and the network component are respectively provided with an internal signaling interaction interface; The local DNS server is turned on by the main control unit or is turned on by a network component.

Preferably, the DNS record generating unit of the converged device is composed of the local DNS server and the converged device CDN component; wherein the converged device CDN component requests the local DNS server to subscribe to the ICP/ISP domain name according to the domain name information in the command. Generating the DNS record; and the converged device CDN component generates the address relationship record according to the address information of the local DNS server advertised by the converged device network component or the main control unit.

Preferably, the DNS resolution device is either a local DNS server performing local resolution in the converged device, or a DNS GSLB performing domain name resolution in a CDN central management system.

On the other hand, the embodiment of the present invention integrates the CDN and the network device, including 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;

The CDN's central management system retains centralized deployment, and uniformly manages and monitors the CDN components of each converged device. In addition, the CDN system's GSLB, DNS resolution, and other components are also centrally managed. Unified deployment of the management system; the above system can also be integrated and deployed with the network management system of the converged device;

The CDN component provides CDN services to users and maintains the user's content service status; the network component provides network access and bearer services to users, and is responsible for maintaining the user's network service status;

The network component enables the DNS service as a local DNS resolution server (the specific implementation can also be enabled by the main control board of the device);

An internal interface that adds interaction between the CDN component and the network component or the device master, and sends the corresponding DNS configuration to obtain DNS server information.

The CDN component adds a correspondence record between the local DNS server address and the CDN service address of the fusion device, and functions on the "3⁄4 CDN Center GSLB system."

Compared with the prior art, the technical effects of the embodiments of the present invention are: adapting to different deployment modes and service scenarios, and satisfying the requirement of positioning the user's network layer connection and the application layer link to the same converged device, thereby better protecting the user service experience. . 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 CDN and network convergence based user positioning method according to the present invention; FIG. 4 is a schematic diagram of a CDN and network convergence based user positioning apparatus according to the present invention; FIG. 5 is a CDN and network convergence based user positioning according to the present invention; Flow chart of the first embodiment;

6 is a flow chart of a second embodiment of user positioning based on CDN and network convergence according to the present invention;

7 is a flow chart of a third embodiment of user location based on CDN and network convergence according to the present invention. detailed description

The CDN and network convergence system and device of the present invention and the user positioning method based on the fusion device in implementing the service bearer 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 according to 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 central management system adopts centralized deployment and is deployed in a unified manner with the DNS server, resource scheduling and load balancing system (GSLB) to manage and maintain CDN components in the converged device, service adaptation, and resource scheduling; The system deployment can also be integrated with the network management system of the converged device. As part of the network management system, it can be 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 central management system establish a management channel and a service channel, and adopt a management channel to implement daily maintenance and management of the network, device configuration and monitoring, etc., and use the service channel to implement content delivery and business information interaction.

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 coordination of user status and policy scheduling can achieve double protection based on user's application content and network service quality, thereby improving user experience.

FIG. 2 shows a general internal structure diagram of a CDN and a network convergence device according to an embodiment of the present invention. In In the present invention, the CDN and the network-integrated new device combine the CDN content distribution node and the network device, adopt a loosely coupled manner for fusion, the CDN component adopts an independent CDN service processing board type, and the network component also adopts an independent network service. The board type is processed; 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.

Inside the system, it is necessary to increase the internal interaction interface between the CDN component and the network component, mainly for the direct interaction needs of the network component and the CDN component. For example: The CDN component applies to the network component for user network acceleration and receiving execution feedback information, user network status query and feedback.

At the same time, the CDN component and the network component also have corresponding internal interfaces with the main control unit to implement management and service interaction. For example, the CDN service card obtains the corresponding configuration policy from the CDN management center, and needs feedback to the main control card. The main control card implements the configuration and implementation of the device. The main control card also needs to apply the corresponding configuration to a specific network service processing board.

In the present invention, in order to locate the network layer connection and the application layer link of the same user on the same converged device, the local DNS service needs to be enabled on the main control unit or the network processing board of the converged device. In order to provide CDN services to users, the CDN service processing board needs to enable the CDN service and issue the CDN external service address. How to connect a network user to a specific converged device, and then apply the link to the device through scheduling and positioning. The CDN component is the focus of the present invention, and the components of the fusion device need to be interacted through the internal interface to perform corresponding cooperation.

FIG. 3 shows a method for user positioning based on the combination of CDN and network shown in FIG. 1 and FIG. 2, as shown in FIG. 3, including:

Step S301: Form a converged device by merging the CDN node of the CDN system with the network device, where the converged device includes a CDN component and a network component, and the local DNS server is deployed on the converged device; The domain name corresponds to the DNS record of the address, and/or the The Fusion Device CDN component generates an address relationship record containing the correspondence between the local DNS server address and the external service address of the Fusion Device CDN component, and reports it to the DNS GSLB of the CDN center;

Step S303: When the user initiates the DNS resolution request, the local DNS server uses the DNS record or the address relationship record to obtain a DNS resolution result for returning to the client, so that the user end according to the analysis result and the location The CDN component of the fusion device establishes an application link, thereby realizing user positioning of the client to the CDN component of the fusion device.

The network component in step S301 is configured to provide network access and bearer services to the UE, and the converged device further includes a main control unit for serving the CDN component and the network component.

The generating the DNS record in step S302 includes: the CDN central management system sends an instruction including the contracted ICP/ISP domain name information to the converged device CDN component; and the converged device CDN component requests the local DNS server to sign the contract according to the domain name information in the instruction. The domain name of the ICP/ISP generates the DNS record; wherein the domain name in the DNS record is the domain name of the contracted ICP/ISP, and the corresponding address is the external service address of the CDN component of the converged device.

The DNS resolution result obtained by using the DNS record described in step S302 includes:

The DNS server queries the locally cached DNS record according to the received user DNS resolution request, and returns the external service address of the CDN component of the converged device corresponding to the contracted ICP/ISP domain name in the DNS record to the client.

The generating the address relationship record in step S302 includes: the converged device network component or the main control unit notifying the address of the local DNS server to the converged device CDN component; the converged device CDN component generating the local DNS server according to the message in the advertisement The address relationship between the address and the external service address of the CDN component of the Fusion Device is recorded and reported to the Domain Name System Resource Scheduling and Load Balancing System DNS GSLB of the CDN Central Management System.

The obtaining the DNS resolution result by using the address relationship record in the step S303 includes: the local DNS server sends the DNS resolution request of the user end to the DNS GSLB; the DNS GSLB queries the domain name record according to the DNS resolution request. Domain name; in the query After the corresponding domain name is obtained, according to the correspondence between the local DNS server address in the address relationship record and the external service address of the converged device CDN component, the corresponding converged device CDN component is determined as a CDN service node, and the parsing result including the address thereof is determined. The local DNS server is returned to the client.

The obtaining the DNS resolution result by using the address relationship record in step S303 includes: the local DNS server sends the DNS resolution request of the client to the DNS root server, and authorizes the DNS to the ICP/ISP according to the ICP/ISP authorized DNS information returned by the local DNS server. The server initiates a DNS query request; the local DNS server initiates a DNS query request to the DNS GSLB according to the DNS information of the used CDN service system returned by the ICP/ISP authorized DNS server in response to the query request; the DNS GSLB is requested according to the DNS query Querying the corresponding DNS record, and determining the corresponding converged device CDN component as a CDN service node according to the correspondence between the local DNS server address in the address relationship record and the external service address of the converged device CDN component, and including the resolution of the address The result is returned to the client via the local DNS server.

FIG. 4 shows a device for user location based on CDN and network convergence according to the present invention, as shown in FIG. 4, including:

The DNS record generating unit of the converged device is configured to generate a DNS record including the contracted ICP/ISP domain name and the external service address of the CDN component of the converged device as the address corresponding to the domain name, or the local DNS server address corresponding to the external service address of the CDN component of the converged device Address relationship record of the relationship;

The DNS resolving device is configured to obtain, by using the DNS record or the address relationship record, a DNS resolution result that is returned to the user end, so that the user end is merged with the parsing result according to the parsing result. The device CDN component establishes an application link, thereby realizing user positioning of the client to the CDN component of the fusion device;

The converged device is a device that combines a CDN node and a network device, and includes: the local DNS server; and the CDN component of the converged device, used to establish and maintain an application link with the client, and provide content distribution. service. The converging device further includes: a network component for providing network access and bearer services to the UE; wherein, the network component of the converged device and the CDN component are provided with an internal signaling interaction interface, so that the network component is directed to the CDN The information of the user address pool on the component, the CDN component applies to the network component for information about the user network acceleration, receiving and executing feedback information, user status query and feedback.

The merging device further includes: a main control unit for serving the CDN component and the network component; wherein the main control unit and the CDN component and the network component are respectively provided with an internal signaling interaction interface; The local DNS server is turned on by the main control unit or by a network component.

The DNS record generating unit of the converged device is composed of the local DNS server and the converged device CDN component; wherein the converged device CDN component requests the local DNS server to generate the domain name for the contracted ICP/ISP according to the domain name information in the command. And the converged device CDN component generates the address relationship record according to the address information of the local DNS server advertised by the converged device network component or the main control unit.

The DNS resolution device is either a local DNS server that performs local resolution in the converged device, or a DNS GSLB that performs domain name resolution in the CDN central management system.

The present invention will be further described below in conjunction with the three embodiments of the CDN and network convergence based user positioning of the present invention illustrated in Figures 5, 6 and 7.

Figure 5 shows a flow diagram of a first embodiment of the CDN and network convergence based user positioning of the present invention. In this embodiment, the systems involved are: user client, fusion device, CDN central management system /DNS/GSLB, business management system, ICP/ISP system.

After the ICP/ISP is contracted to use the CDN and the network service in the present invention, the CDN central management system delivers the user positioning and scheduling policy to the corresponding converged device according to the policy, and increases the DNS record for the ICP/ISP locally in the converged device. The service node is set as a local CDN component; when the user initiates an access request, the analysis result is directly obtained locally on the corresponding fusion device, and the user is located at the local CDN service node. The business implementation steps are as follows:

1. In this scenario, the convergence device is used to provide the network bearer and CDN service for the user at the same time. In addition to the corresponding CDN central management system to manage the device, there is also a corresponding service management system to realize the management and service of the service. Acceptance, etc. Target customers, such as: ICP/ISP hopes to purchase and select the corresponding CDN service, and can apply for CDN service through the service provider's business management system;

2. The business management system will query the corresponding resources; confirm that it can meet the user's service requirements, conduct business acceptance, and return business acceptance confirmation information to ICP/ISP;

3. After the service is successfully accepted, the service management system sends a service deployment instruction to the CDN central management system. In this method, the domain name information of the ICP/ISP is mainly considered to realize the positioning of the user CDN service; thus, the instruction is to the CDN. The central management system/DNS/GSLB issues the domain name information of the ICP/ISP, and implements the requirement for the user CDN service positioning according to the domain name information;

4. The CDN central management system delivers a user positioning policy for the ICP/ISP to the CDN component of each converged device; the specific instruction content includes the domain name information of the contracted ICP/ISP, and a local parsing request according to the domain name information;

5. The converged device has previously enabled the DNS service. The DNS server is enabled by the main control unit of the converged device (it can also be opened by the network service processing board, but it is not recommended). After receiving the user positioning policy delivered by the CDN central management system, the CDN component of the converged device passes the internal interface between the CDN component and the main control unit of the converged device according to the domain name information in the command (when the DNS server is opened by the network processing board) The DNS server is required to generate a corresponding DNS record for the domain name of the contracted ICP/ISP through the internal interface between the CDN component and the network component. The domain name in the record is the domain name of the contracted ICP/ISP, and the corresponding address is Converged device CDN component external service address;

6. After the domain name record is successfully added, the main control unit (or network component) of the converged device returns a domain name record adding success message to the CDN component of the converged device;

7. The CDN component of the converged device receives the domain name record adding success message, and returns a successful completion message of the user positioning policy of the contracted ICP/ISP to the CDN central management system; 8. After receiving the user location policy success message returned by the CDN component of all the converged devices, the CDN central management system feeds back to the service management system, and the service has been deployed.

So far, the first embodiment of the present invention has been deployed and implemented. The following is a brief process description of the user's business access.

1. The user has access to the business application and sends a DNS request, such as: www.sohu.com;

2. The user's network connection is first connected to the converged device. The converged device is enabled with the DNS server. When the user establishes a network connection, the converged device is the user connected to it, and the assigned DNS server address is the address of the local DNS server. The DNS server provides domain name resolution services for users. When receiving a user DNS request, first check the local DNS cache, for example: the domain name ww _W . _s requested by the user. h _U x. _m , for signing the ICP/ISP, the previous DNS server has the corresponding DNS record, and the corresponding address in the record is the external service address of the local CDN component; after the query, the query result is returned to the user client;

3. After obtaining the query result, the user client establishes an application layer link with the CDN component of the fusion device according to the address information in the result, and requests the content service.

The feature of the embodiment is that, according to the domain name of the contracted ICP/ISP and the external service address of the CDN component of the fusion device, a corresponding record is formed, and a corresponding DNS record is added in the local DNS server, and the user's DNS request can be obtained on the local DNS server. Analyze the results. It is suitable for contracted customers and for closed services. The efficiency of DNS query in this embodiment is high and distributed analysis helps to reduce the pressure on the central DNS resolution server.

Figure 6 shows a flow diagram of a second embodiment of the CDN and network convergence based user positioning of the present invention. In this embodiment, the systems involved are: user client, fusion device, CDN central management system /DNS/GSLB, business management system, ICP/ISP system, etc.

In the present invention, after the ICP/ISP contract uses the CDN and the network service, the ICP/ISP DNS record is added by the GSLB of the CDN central system, and is uniformly maintained; when the user initiates the access request, the DNS record cannot be found locally in the converged device. It will request from the center GSLB, and the GSLB determines the CDN serving the user according to the relationship between the DNS service address and the CDN service address and the scheduling policy. Service address, return the analysis result; locate the user on the local CDN service node.

The specific implementation steps are as follows:

1. ICP/ISP hopes to use CDN service to apply for CDN service to business management system;

2. After the service management system accepts the service request of the ICP/ISP, the CDN service opening instruction is issued to the CDN central management system; in this implementation embodiment, the domain name of the user by the DNS GSLB of the CDN central management system is adopted. The method of parsing and performing load balancing scheduling; therefore, the instruction includes the domain name information of the contracted ICP/ISP and related instructions for local parsing according to the domain name; after receiving the service opening instruction, the CDN central management system The domain name record corresponding to the ICP/ISP is added to the DNS GLSB, and relevant resources are reserved for the service development; after the deployment is completed, the CDN service deployment completion message is returned to the service management system;

3. After receiving the CDN service deployment completion message, the service management system returns a subscription confirmation message to the ICP/ISP system.

In the specific implementation, the fusion device is also required to perform corresponding cooperation. The Fusion Device needs to enable the DNS service (either the main control unit is enabled, or the network service processing board is enabled, and the main control unit is recommended to be enabled); the component that enables the DNS service advertises the local DNS server address to the CDN component through the internal interface; After receiving the notification message, a record of the correspondence between the local DNS server address and the local CDN external service address is generated, and is notified to the CDN central management system through the CDN component and the management interface of the CDN central management system, and is sent to the DNS by the CDN central management system. GSLB. This serves as the basis for positioning and load balancing users.

At this point, the business deployment is completed. The following are the processing steps when the user accesses the business:

1. The user client needs to access the service and initiate a service request. First, the DNS solution needs to be performed.

2. The DNS server is enabled on the Fusion device. After receiving the DNS request, the local cache is queried. If there is no corresponding cache record, the upper DNS server requests the resolution. In this embodiment, the DNS server of the Fusion device is configured. Set the DNS GSLB of the CDN center to the upper DNS server; 3. The DNS GSLB of the CDN center performs DNS resolution. If the corresponding cache record cannot be found, it needs to be queried to the higher-level DNS server. However, the domain name of the signed ICP/ISP is already local according to the previous deployment. The corresponding domain name record is added and can be queried in the cache. After the corresponding domain name is queried, the corresponding relationship between the local DNS server address and the CDN external service address reported by the CDN component of each converged device is analyzed. The relationship locates the user back to the local CDN, ensures that the user's network connection and the application layer link are on the same converged device, and returns the parsing result to the local DNS server;

1. After receiving the parsing result, the local DNS server of the converged device returns the parsing result to the user client.

2. The user client establishes an application layer link and requests a content service according to the CDN service address returned by the DNS resolution.

The feature of this embodiment is that the CDN center DNS GSLB adds the DNS record of the contracted ICP/ISP, and locates the user according to the correspondence between the DNS server and the CDN service address reported by each CDN component. The converged device needs to enable the DNS server and designate the upper-level DNS server as the DNS GSLB of the CDN center. The CDN component needs to record the correspondence relationship according to the DNS server address of the Fusion device and its external CDN service address, and report it to the DNS GSLB of the CDN center as the basis for user location. This embodiment is more suitable for signing ICP/ISP. , and relatively closed business. At the same time, the CDN center DNS GSLB centralized cache record can reduce the need to add DNS records to each converged device during initial deployment. It is highly efficient and easier to manage and maintain.

Figure 7 is a flow chart showing a third embodiment of the CDN and network convergence based user positioning of the present invention. In this embodiment, the systems involved are: user client, converged device, CDN central management system /DNS/GSLB, DNS root server, ISP authorized DNS server.

In the present invention, a deployment method similar to the current CDN service provider is adopted, except that the DNS service is enabled on the network component of the converged device, and the local DNS server address is notified to the CDN component of the converged device, and the local DNS server is generated by the CDN component. Address and CDN service The correspondence between the service addresses and the DNS GSLB of the CDN central management system; when the user accesses the application, the normal DNS resolution process is performed. When there is no DNS record locally, the upper DNS query is performed until the root DNS, the root DNS redirects the request to the ISP authorization. DNS; the ISP authorizes the DNS to redirect the request to the DNS GSLB of the CDN central management system. The GSLB determines the CDN service address serving as the user according to the relationship between the DNS service address and the CDN service address, and returns the analysis result. Position the user on the local CDN service node.

The specific implementation steps are as follows:

Before the user client accesses the service, you need to do some pre-deployment. You need to enable the DNS server on the main control unit of the converged device (or the network service processing unit); and advertise the address of the DNS server to the converged device through the internal interface. The CDN component generates a correspondence between the local DNS server address and the CDN service address by the CDN component, and advertises to the CDN central management system through the CDN component and the management channel of the CDN central management system, and synchronizes to the central DNS GSLB, so that the DNS GSLB has the basis for user positioning. At the same time, the network component needs to be configured and delivered when the user establishes a network connection, so that the DNS server address of the user network connection is the DNS server address of the converged device.

The following is the user service access processing flow:

1. The user needs to access the application, first initiates a DNS resolution request; because the DNS server address in the user's network connection is the DNS server address of the converged device, the DNS resolution request is sent to the DNS server of the converged device;

2. The DNS server of the converged device queries the local DNS cache. If the corresponding DNS record is not queried, the upper DNS server initiates a query request. In this embodiment, the upper DNS server is not set to DNS GSLB and is set to external DNS. Server; in case the external DNS server does not have a corresponding cache, the DNS root server can be queried step by step;

3. After receiving the DNS query request, the DNS root server searches for the level by step, and finally the local DNS server can obtain the ISP authorized DNS server address;

4. The local DNS server of the converged device initiates a DNS check to the ISP authorized DNS server. Inquire for

5. After the ISP authorizes the DNS server to receive the DNS query request, the ISP uses the CDN service to return the DNS server address of the CDN system. In this system, if the ISP adopts the CDN service provided by the system, the return is The address of the DNS GSLB of the system CDN central management system;

6. The local DNS server of the converged device initiates a DNS query request to the DNS GSLB of the CDN central management system according to the DNS server address that the ISP authorizes the DNS server to return;

7. The DNS GSLB of the CDN central management system queries the corresponding DNS record, and determines the CDN service node for the user according to the correspondence between the local DNS server and the CDN service address, and returns the analysis result to the local DNS server of the converged device;

8. The local DNS server of the converged device returns the parsing result to the user client according to the received DNS parsing result;

9. The user client can obtain the CDN service address according to the received DNS resolution result; thus, an application layer link can be established, the application can be accessed, and the content service can be requested.

A feature of such an embodiment is that the general flow of existing DNS resolution is preserved. The difference is that the local DNS is the DNS server of the converged device, and the CDN component of the converged device reports the correspondence between the local DNS server and the CDN service address to the DNS GSLB system of the CDN center. Such an embodiment is more suitable for signing a scenario where ICP/ISP and non-contracted ICP/ISP, closed services and open Internet services are mixed.

The invention is based on a device for CDN and network convergence, and provides a user positioning method and device based on such device. The advantage of such a device is that the content distribution node of the CDN and the network device are merged, and the corresponding user state is maintained in the CDN component and the network component, and the interaction of the internal interface can achieve double guarantee of content quality and network quality. In order to better achieve the synergy between user content status and network status to better protect the user experience, the user's network layer connection and application layer link should be located on the same converged device. The method is mainly based on locally deploying a DNS server in a converged device to locate a user to a local CDN component, and specifically provides three realities. Example. The three embodiments are adapted to different deployment modes and service scenarios to meet the requirements of the user's network layer connection and application layer link to the same converged device, so as to better protect the user service experience.

Specifically, the apparatus for user location based on CDN and network convergence of the present invention has the following features:

1) The network convergence device of the present invention combines the network and the CDN function, and the network components and the CDN components are loosely coupled, thereby realizing the integration at the device level;

2) interaction between the network component and the CDN component through the internal system interface and the message interface; enabling the network component and the CDN component to have synergistic capabilities;

3) The network component and the CDN component interact with the device main control unit through the internal system interface and the message interface; so that the three have the ability to cooperate;

4) The network component and the CDN component have their own user state machines, and the state machines of the two are independent of each other;

5) The network component and the CDN component respectively maintain the network state machine and the content state machine of the user, thereby facilitating user-based refined operation and service guarantee;

6) The CDN component is managed by a unified CDN central manager, which can be set up independently or incorporated into the network management system of the converged device described herein as an integral part of the network management system;

7) DNS GSLB and CDN central management system integration, unified deployment; centralized deployment;

8) The converged device starts the DNS service to implement localization of the DNS resolution service;

9) The CDN central management system/GSLB may issue a user positioning policy to the CDN component of the converged device; after the CDN component of the converged device interprets the policy, the configuration command is issued to the main control or network component of the converged device, according to the local CDN service address. Corresponding relationship with the domain name, the corresponding DNS record is added; when subsequent user application accesses, the DNS query can directly locate the CDN service address of the device; 10) The CDN component of the converged device has a function of generating a correspondence between the address of the local DNS server and the service address of the CDN, and reporting the report to the CDN central management system/DNS GSLB;

11) The CDN Center DNS GSLB can add the corresponding DNS record, and implement the positioning of the user according to the correspondence between the local DNS server address reported by the CDN component of the converged device and the service address of the CDN.

In summary, the present invention ensures the user service experience by positioning the user's network layer connection and application layer link to the same converged device.

Although the invention has been described in detail above, the invention is not limited thereto, and various modifications may be made by those skilled in the art in accordance with the principles of the invention. Therefore, modifications made in accordance with the principles of the present invention should be construed as falling within the scope of the present invention.

Claims

claims

1. A user positioning method based on the integration of content distribution network CDN and network, including: forming a fusion device by merging the CDN nodes of the CDN system with network devices, the fusion device includes CDN components and network components, and the A local DNS server is deployed on the converged device;

Generate a DNS record containing the contracted ICP/ISP domain name and the external service address of the convergence equipment CDN component as the corresponding address of the domain name, and/or generate an address relationship record containing the correspondence between the local DNS server address and the external service address of the convergence equipment CDN component;

When the user initiates a DNS resolution request, the DNS record or address relationship record is used to obtain the DNS resolution result returned to the user, so that the user can establish an application with the converged device CDN component based on the DNS resolution result. Link to realize user positioning from the user end to the CDN component of the converged device.

2. The method according to claim 1, wherein the network component is used to provide network access and bearer services to users, and the convergence device further includes a main control unit used to serve the CDN component and the network component. .

3. The method according to claim 1, wherein the generating DNS records includes: the CDN center management system issues instructions containing contracted ICP/ISP domain name information to the converged device CDN component; and

The fusion device CDN component requests the local DNS server to generate the DNS record for the contracted ICP/ISP domain name based on the domain name information in the instruction;

The domain name in the DNS record is the domain name of the contracted ICP/ISP, and the corresponding address is the external service address of the CDN component of the convergence device.

4. The method according to claim 3, wherein said utilizing the DNS record to obtain the DNS resolution result includes:

The local DNS server queries the locally cached DNS based on the received DNS resolution request. record, and return the external service address of the CDN component of the converged device corresponding to the contracted ICP/ISP domain name in the DNS record to the user.

5. The method according to claim 2, wherein the generating address relationship records includes:

The network component or main control unit of the convergence device notifies the address of the local DNS server to the CDN component of the convergence device;

The convergence device CDN component generates an address relationship record regarding the correspondence between the local DNS server address and the convergence device CDN component's external service address based on the message in the notification, and reports it to the domain name system resource scheduling and load of the CDN center management system. Balance system DNS GSLB.

6. The method according to claim 5, wherein said utilizing the address relationship record to obtain DNS resolution results includes:

The local DNS server sends the DNS resolution request to the DNS GSLB;

The DNS GSLB queries the corresponding domain name in its domain name record according to the DNS resolution request;

After querying the corresponding domain name, based on the correspondence between the local DNS server address in the address relationship record and the external service address of the convergence device CDN component, the corresponding convergence device CDN component is determined as the CDN service node, and the resolution containing its address is The results are returned to the client via the local DNS server.

7. The method according to claim 5, wherein said using the address relationship record to obtain the DNS resolution result includes:

The local DNS server sends the DNS resolution request to the DNS root server, and initiates a DNS query request to the ICP/ISP authorized DNS server based on the ICP/ISP authorized DNS information returned;

The local DNS server initiates DNS to the DNS GSLB based on the DNS information of the CDN service system returned by the ICP/ISP authorized DNS server in response to the query request. query request;

The DNS GSLB queries the corresponding DNS record according to the DNS query request, and determines the corresponding fusion device CDN component as the CDN service node based on the correspondence between the local DNS server address in the address relationship record and the external service address of the fusion device CDN component. , and returns the resolution result containing its address to the client via the local DNS server.

8. A user positioning device that realizes the integration of content distribution network CDN and network, including:

The DNS record generation unit of the convergence device is configured to generate a DNS record containing the contracted ICP/ISP domain name and the external service address of the convergence device CDN component as the corresponding address of the domain name, or containing the local DNS server address corresponding to the external service address of the convergence device CDN component. The address relationship record of the relationship;

The DNS parsing device is configured to use the DNS record or address relationship record to obtain the DNS parsing result returned to the user end when the user initiates a DNS parsing request, so that the user end can compare the DNS parsing result with the The CDN component of the converged device establishes an application link to realize user positioning from the user end to the CDN component of the converged device;

Wherein, the fusion device is a device that integrates CDN nodes and network devices, including: the local DNS server; and

The CDN component of the fusion device is configured to establish and maintain application links with the client, and provide content distribution services.

9. The device according to claim 8, the convergence device further includes a network component that provides network access and bearer services to the user end;

Among them, an internal signaling interaction interface is provided between the network component and the CDN component of the converged device for the network component to report user address pool information to the CDN component, and the CDN component applies to the network component for user network acceleration, reception and execution feedback information. , user status query and feedback information.

10. The device according to claim 9, the fusion device further comprising: serving CDN Main control unit for components and network components;

Among them, the main control unit has internal signaling interaction interfaces with the CDN component and the network component respectively;

Wherein, the local DNS server is started by the main control unit or by a network component.

11. The device according to claim 9, the DNS record generating unit of the fusion device is composed of the local DNS server and the fusion device CDN component;

Among them, the fusion device CDN component requests the local DNS server to generate the DNS record for the domain name of the contracted ICP/ISP based on the domain name information in the instruction; and

The CDN component of the convergence device generates the address relationship record based on the address information of the local DNS server notified by the network component of the convergence device or the main control unit.

12. The device according to claim 8, the DNS resolution device is either a local DNS server that performs local resolution in the converged device, or a DNS GSLB that performs domain name resolution in the CDN center management system.