WO2021023018A1

WO2021023018A1 - Service scheduling method and apparatus

Info

Publication number: WO2021023018A1
Application number: PCT/CN2020/103766
Authority: WO
Inventors: 童浩; 王金东
Original assignee: 南京中兴新软件有限责任公司
Priority date: 2019-08-05
Filing date: 2020-07-23
Publication date: 2021-02-11
Also published as: CN112333108A

Abstract

The present application provides a service scheduling method and apparatus. One method is applied to an access network device, and comprises: intercepting a content distribution network (CDN) service request sent by a user terminal, and performing network address translation (NAT) address substitution on a source Internet protocol (IP) address in the CDN service request; and forwarding the CDN service request subjected to the NAT address substitution to a global load balancing server GSLB so that the GSLB redirects the CDN service request to mobile edge computing (MEC) to which the user terminal belongs or a CDN edge node, a CDN service node being provided in the MEC to which the user terminal belongs.

Description

Method and device for business scheduling

Technical field

The embodiments of the present disclosure relate to but are not limited to a content distribution network CDN (Content Distribution Network).

Background technique

Content Distribution Network (CDN, Content Distribution Network) has been used for many years in the fields of Internet audio and video transmission, Internet file caching, IPTV (Internet Protocol Television)/OTT (Over-The-Top) network media transmission and other fields. CDN is a content distribution network built on the network, relying on edge servers deployed in various places, through the load balancing, content distribution, scheduling and other functional modules of the central platform, so that users can obtain the required content nearby, reduce network congestion, and improve user access Response speed and hit rate. In recent years, various Internet services have entered a stage of rapid development, especially the development of mobile Internet has shown a blowout state, the popularization of 4K, the development of 8K (resolution), VR (Virtual Reality) video , The demand for low latency and the occupation of network bandwidth require technological innovation.

However, whether it is a wired network or a wireless network, due to the requirements of traditional services, the edge nodes of a CDN are generally deployed in places with a relatively high network level, such as the edge of the core network. This is applicable to traditional web pages and standard-definition multimedia content request responses. However, for the current common 4K scenes, emerging services such as 8K and VR in the 5G era have extremely high requirements for the response between the terminal and the server, and high-throughput, low-latency, QoS (Quality of Service, Service quality) guarantee requirements.

At this time, the service capabilities of traditional CDN edge nodes cannot meet the requirements of the above-mentioned new services. In order to improve the user experience, the CDN must be closer to the user. It is a general consensus of almost all CDN service providers to further sink the service nodes of CDN and get closer to service users. However, the sinking of CDN service nodes has also brought about an increase in the number of CDN nodes and the difficulty of node management.

Summary of the invention

On the one hand, the embodiments of the present disclosure provide a service scheduling method, which is applied to an access network device, including: hijacking a content delivery network CDN service request sent by a user terminal, and sending the CDN service request to the source Internet Protocol IP address Perform network address translation NAT address replacement; forward the CDN service request after the NAT address replacement to the global load balancing server GSLB, so that the GSLB redirects the CDN service request to the mobile edge computing MEC to which the user terminal belongs Or a CDN edge node; the MEC to which the user terminal belongs is provided with a CDN service node.

On the other hand, the embodiment of the present disclosure also provides a service scheduling method, which is applied to the global load balancing server GSLB, including: receiving a content delivery network CDN service request of a user terminal; according to the mobile edge carried in the CDN service request The Internet Protocol IP address of the MEC is calculated to determine the MEC to which the user terminal belongs; the MEC to which the user terminal belongs is provided with a CDN service node; when the CDN service node is in normal state, the CDN service request is redirected to the The MEC to which the user terminal belongs.

On the other hand, the embodiment of the present disclosure also provides a service scheduling device, which is applied to the access network equipment, and includes: a hijacking and replacement unit configured to hijack a CDN service request of a content distribution network sent by a user terminal, and combine the In the CDN service request, the source Internet Protocol IP address performs network address translation NAT address replacement; the forwarding unit is configured to forward the CDN service request after the NAT address replacement to the global load balancing server GSLB, so that the GSLB can serve the CDN The request is redirected to the mobile edge computing MEC or CDN edge node to which the user terminal belongs; the CDN service node is set in the MEC to which the user terminal belongs.

On the other hand, the embodiment of the present disclosure also provides a service scheduling device, which is applied to the global load balancing server GSLB, and includes: a receiving unit configured to receive a CDN service request of a user terminal from a content distribution network; and a determining unit configured to The Internet Protocol IP address of the mobile edge computing MEC to which the user terminal belongs, carried in the CDN service request, determines the MEC to which the user terminal belongs; a CDN service node is set in the MEC to which the user terminal belongs; a redirection unit, It is configured to redirect the CDN service request to the MEC to which the user terminal belongs when the status of the CDN service node is normal.

On the other hand, the embodiments of the present disclosure also provide a service scheduling device, which is applied to an access network device, and includes a memory, a processor, and a computer program stored on the memory and running on the processor, When the computer program is executed by the processor, any one of the service scheduling methods executed by the access network device is implemented.

On the other hand, the embodiments of the present disclosure also provide a service scheduling device, which is applied to the global load balancing server GSLB, and includes a memory, a processor, and a computer program stored on the memory and running on the processor When the computer program is executed by the processor, any one of the service scheduling methods executed by the global load balancing server GSLB is implemented.

On the other hand, the embodiments of the present disclosure also provide a computer-readable storage medium having an information processing program stored on the computer-readable storage medium, and when the information processing program is executed by a processor, any method described herein is implemented A step of.

Description of the drawings

The accompanying drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present disclosure, and do not constitute a limitation to the present disclosure.

FIG. 1 is a schematic flowchart of a service scheduling method provided by an embodiment of the disclosure;

2 is a schematic flowchart of a service scheduling method provided by another embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a service scheduling system provided by an embodiment of the disclosure;

4 is a schematic flowchart of a service scheduling method provided by another embodiment of the present disclosure;

FIG. 5 is a schematic flowchart of a service scheduling method provided by another embodiment of the present disclosure;

FIG. 6 is a schematic flowchart of a service scheduling method provided by another embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a service scheduling apparatus provided by an embodiment of the disclosure;

FIG. 8 is a schematic structural diagram of a service scheduling apparatus provided by another embodiment of the present disclosure.

detailed description

In order to make the objectives, features and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments in this application and the features in the embodiments can be combined arbitrarily with each other if there is no conflict.

The steps shown in the flowchart of the drawings may be executed in a computer system such as a set of computer-executable instructions. And, although a logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than here.

According to some embodiments of the present disclosure, NAT address replacement is performed on the access network device, and then the GSLB is responsible for the global load balancing of the CDN service node, which can effectively improve the load balancing efficiency in the MEC scenario and ultimately improve the user experience.

Figure 1 is a schematic flow chart of a service scheduling method provided by an embodiment of the present disclosure. As shown in Figure 1, the method may include: Step 101: Hijacking a CDN service request sent by a user terminal from a content distribution network, In the CDN service request, the source Internet Protocol IP address performs network address translation NAT address replacement; step 102, the CDN service request after the NAT address replacement is forwarded to the global load balancing server GSLB, so that the GSLB can forward the CDN service request Redirect to the mobile edge computing MEC or CDN edge node to which the user terminal belongs; the CDN service node is set in the MEC to which the user terminal belongs.

In one embodiment, the performing NAT address replacement of the source IP address in the CDN service request includes: replacing the source IP address of the CDN service request with the IP address of the mobile edge computing MEC to which the user terminal belongs .

In an embodiment, before hijacking the CDN service request sent by the user terminal, the method further includes: receiving the CDN service request sent by the user terminal, and judging whether to hijack the CDN service request according to a preset policy.

Fig. 2 is a schematic flowchart of a service scheduling method provided by another embodiment of the present disclosure. As shown in Fig. 2, the method may include: step 201, receiving a CDN service request from a user terminal; step 202, according to the The IP address of the MEC carried in the CDN service request determines the MEC to which the user terminal belongs; a CDN service node is set in the MEC to which the user terminal belongs; step 203, when the CDN service node is in a normal state, the CDN The service request is redirected to the MEC to which the user terminal belongs.

In an embodiment, after redirecting the CDN service request to the MEC to which the user terminal belongs, the method further includes: the CDN service node provides the CDN service to the user terminal.

In an embodiment, the method further includes: when the state of the MEC to which the user terminal belongs is abnormal, redirecting the CDN service request to the CDN edge node to which the user terminal belongs.

In an embodiment, after redirecting the CDN service request to the CDN edge node to which the user terminal belongs, the method further includes: the CDN edge node provides the CDN service to the user terminal.

In an embodiment, the method further includes: regularly receiving status information reported by the CDN serving node; and judging whether the CDN serving node is in a normal state according to the status information.

As shown in Figure 3, compared with the traditional CDN system technology, in addition to the traditional CDN central node and CDN edge node, this embodiment adds an access layer based on MEC ((Mobile Edge Computing, Mobile Edge Computing, Mobile Edge Computing). ) CDN service node. The CDN service node can be a complete service node function, or it can be a different combination of a specific set of CDN core functions, and it is a virtualized CDN service node. The CDN service node and GSLB There is a link between (Gobal Server Load Balance, global load balancing server) through which status information and user load conditions can be reported to GSLB. GSLB monitors the CDN service node in the MEC through this link and finally decides whether to transfer the user The CDN service request is loaded on the CDN service node.

In one embodiment, the user equipment UE is configured to initiate a CDN service request; the UE is in one or more MEC coverage areas, that is, the UE belongs to one or more MECs.

In one embodiment, the access network device is configured to receive the CDN service request sent by the UE, and determine whether to hijack the CDN service request according to a preset policy; when the preset policy is met, the CDN service request is hijacked, and The source IP address in the CDN service request performs NAT (Network Address Translation) address replacement; then the CDN service request after the address replacement is forwarded to GSLB; the NAT address replacement specifically refers to the source IP of the CDN service request The address is replaced with the IP address of the mobile edge computing MEC to which the user terminal belongs. The access network device stores the IP address of the MEC corresponding to the terminal.

The access network device may be a base station (BS, base station) or a baseband processing unit (BBU, Building Baseband Unite), etc.

The preset policy may be a traffic control policy set by an operator, such as a request to hijack a specific destination address.

In one embodiment, the GSLB regularly receives the status information reported by the CDN service node in the MEC, and judges whether the CDN service node status is normal according to the status information; when the CDN service request from the UE is received, it is based on the CDN service request The IP address of the MEC carried in it determines the MEC to which the UE belongs. When the CDN service node is in a normal state, the CDN service request is redirected to the MEC to which the user terminal belongs; when the MEC to which the user terminal belongs is in an abnormal state At this time, the CDN service request is redirected to the CDN edge node to which the user terminal belongs.

Among them, MEC (also referred to as MEC platform) is a virtualization platform based on MEC technology, loaded with CDN service nodes, and the CDN service nodes may be CDN APPs (applications) or CDN groups that provide user services. When the CDN service request is redirected to the MEC to which the user terminal belongs, the CDN service node in the MEC directly provides the CDN service for the user or provides the CDN service after returning to the source station. MEC can be set separately or in the access device.

In addition, the CDN service node in the MEC regularly reports status information such as node status and load status to GSLB. If it is not reported for multiple cycles, GSLB will set the CDN service node to abnormal status and will not schedule users to the CDN service node Request, and actively report information to GSLB after the CDN service node status returns to normal.

In an embodiment, a CDN edge node can also be deployed at the core network layer. The main function of the CDN edge node is when the CDN service node in the user's home MEC is abnormally unable to provide services (or when the user does not belong to any MEC coverage area), GSLB dispatches user requests to the nearest CDN edge node to provide users with CDN services.

In one embodiment, one MEC may subordinate multiple access network devices, that is, serve multiple access network devices. For example, when the mobile user's serving base station changes but still belongs to the same MEC, the CDN serving node that provides the service will not change, and there is no need to switch the CDN serving node.

Exemplarily, when the user's CDN service node in the MEC coverage area is in a normal state and can provide user services, the user's CDN service request will be hijacked, and the message will be NAT translated, replacing the user source IP address with the current MEC This operation is to more accurately determine the MEC area to which the user belongs, so as to help GSLB more accurately perform MEC CDN scheduling for the user. When the user's CDN service node in the MEC coverage area is abnormal, that is, the user service cannot be provided normally, the user's content service request will still be hijacked by the MEC, and the message will be NATed to replace the user's source IP address with the current MEC's IP address. At this time, GSLB will allocate other edge CDN nodes close to the user to provide users with high-quality services. Through the above design, the accuracy of GSLB scheduling can be effectively improved, and the risk of unserviceability caused by abnormal MEC CDN nodes can be reduced.

According to the embodiments of the present disclosure, the access network device replaces the hijacked CDN service request with NAT address and forwards it to GSLB. The GSLB performs global load balancing according to the MEC IP address carried in the CDN service request, which can achieve user accuracy and Load nearby to improve user experience.

Based on the system shown in FIG. 3, the embodiment of the present disclosure provides another service scheduling method.

In this embodiment, the access network equipment takes a base station as an example.

As shown in FIG. 4, the method may include steps 401 to 409.

In step 401, the user terminal UE initiates a CDN service request.

Among them, the user terminal is in the coverage area of a certain MEC, that is, belongs to a certain MEC.

In this embodiment, the CDN service request is used to request access to a certain video resource of the website whose destination address is A, and the CDN service request is an HTTP (HyperText Transfer Protocol, Hypertext Transfer Protocol) request.

In step 402, the base station receives the CDN service request sent by the UE, and judges to hijack the CDN service request according to a preset strategy.

Wherein, the preset policy may be set by the operator in advance, for example, hijacking the request for accessing the destination address as A.

In step 403, the base station performs NAT address replacement for the source IP address in the hijacked CDN service request, and forwards the replaced CDN service request to GSLB.

Wherein, the NAT address replacement specifically refers to replacing the source IP address of the CDN service request with the IP address of the mobile edge computing MEC to which the user terminal belongs.

In step 404, the GSLB receives the CDN service request, and determines the MEC to which the user terminal belongs according to the IP address of the MEC to which the user terminal belongs, carried in the CDN service request.

In step 405, the GSLB judges whether the status of the CDN serving node in the MEC to which the UE belongs is normal.

Wherein, the status information reported by the CDN service node is periodically received; according to the status information, it is determined whether the status of the CDN service node is normal. The status information includes whether the heartbeat connection is normal, whether the service can be provided, etc.

Exemplarily, the CDN service node in the MEC regularly reports the status of the current node to the GSLB through a heartbeat message, and the GSLB determines whether the connection is normal according to the heartbeat report of the MEC CDN service node. The CDN service node in the MEC regularly reports the current service status and user load conditions to the GSLB. GSLB analyzes and processes the reported data, and determines whether the CDN service node can provide services according to the reported information during user load scheduling. When the heartbeat connection is normal and the service can be provided, it is determined that the status of the CDN service node is normal, and when the heartbeat connection is abnormal or the service cannot be provided, it is determined that the status of the CDN service node is abnormal.

When the status of the CDN service node is normal, step 406 is executed, and when the status of the CDN service node is abnormal, step 408 is executed.

In step 406, GSLB redirects the CDN service request to the MEC to which the UE belongs.

In step 407, the CDN serving node in the MEC to which the UE belongs provides CDN services to the UE.

Exemplarily, after receiving the CDN service request, the CDN service node retrieves whether the resource corresponding to the CDN service request is stored locally; when it is stored locally, it directly returns the response of the CDN service request to the user terminal Message; when it is not saved locally, after pulling the resource from the CDN central node, the response message of the CDN service request is returned to the user terminal, and the response message carries the resource corresponding to the CDN service request.

In step 408, GSLB redirects the CDN service request to the CDN edge node to which the UE belongs.

In step 409, the CDN edge node provides a CDN service to the UE.

Exemplarily, after receiving the CDN service request, the CDN edge node retrieves whether the resource corresponding to the CDN service request is stored locally; when it is stored locally, it directly returns the response message of the CDN service request to the user terminal ; When the resource is not saved locally, after pulling the resource from the CDN central node, the response message of the CDN service request is returned to the user terminal, and the response message carries the resource corresponding to the CDN service request.

In this embodiment, the access network equipment takes a base station as an example. In this embodiment, the CDN serving node in the MEC to which the UE belongs is normal.

As shown in FIG. 5, the method may include steps 501 to 505.

In step 501, the UE initiates a CDN service request.

Among them, the user terminal is in a certain MEC coverage area.

In step 502, the base station hijacks the CDN service request, replaces the source IP address of the CDN service request with the IP address of the MEC to which the UE belongs, and forwards the replaced CDN service request to GSLB.

In step 503, the GSLB receives the CDN service request, and determines the home MEC of the UE according to the IP address of the MEC in the CDN service request.

In step 504, the GSLB determines that the status is normal according to the heartbeat report of the CDN service node in the MEC and other parameters, and redirects the CDN service request to the MEC.

Among them, the CDN service node in the MEC regularly reports the connection status through heartbeat messages, and also regularly reports the current service status, user load conditions and other parameters to the GSLB, and the GSLB analyzes and processes the reported data. When user load scheduling is performed, the selection of CDN service node is determined according to the reported information.

In step 505, the CDN serving node in the MEC provides CDN services to the UE.

In this embodiment, the access network equipment takes a base station as an example. In this embodiment, the CDN serving node in the MEC to which the UE belongs is abnormal.

As shown in FIG. 6, the method may include steps 601 to 605.

In step 601, the UE initiates a CDN service request.

Among them, the user terminal is in a certain MEC coverage area.

In step 602, the base station hijacks the CDN service request, replaces the source IP address of the CDN service request with the IP address of the MEC to which the UE belongs, and forwards the replaced CDN service request to GSLB.

In step 603, the GSLB receives the CDN service request, and determines the home MEC of the UE according to the IP address of the MEC in the CDN service request.

In step 604, the GSLB determines that its status is abnormal according to the heartbeat report of the CDN service node in the MEC and other parameters, and redirects the CDN service request to the CDN edge node to which the user belongs.

In step 605, the CDN edge node provides a CDN service to the UE.

The CDN edge node may also report the status of the current node to the GSLB through a heartbeat message.

FIG. 7 is a schematic structural diagram of a service scheduling apparatus provided by an embodiment of the present disclosure. The apparatus is applied to access network equipment, as shown in FIG. 7, and includes: a hijacking and replacement unit configured to hijack content sent by a user terminal Distribute the network CDN service request, and perform NAT address replacement for the source IP address in the CDN service request; the forwarding unit is configured to forward the CDN service request after the NAT address replacement to the global load balancing server GSLB, so that the GSLB The CDN service request is redirected to the MEC or CDN edge node to which the user terminal belongs; the CDN service node is set in the MEC to which the user terminal belongs.

In one embodiment, the hijacking and replacement unit is further configured to receive the CDN service request sent by the user terminal before hijacking the CDN service request sent by the user terminal, and determine whether to hijack the CDN according to a preset policy Request for service.

FIG. 8 is a schematic structural diagram of a service scheduling apparatus provided by another embodiment of the present disclosure. The apparatus is applied to a global load balancing server GSLB, as shown in FIG. 8, including: a receiving unit configured to receive CDN services from user terminals Request; the determining unit, configured to determine the MEC to which the user terminal belongs according to the IP address of the MEC to which the user terminal belongs carried in the CDN service request; the MEC to which the user terminal belongs is provided with a CDN service node; The directional unit is configured to redirect the CDN service request to the MEC to which the user terminal belongs when the status of the CDN service node is normal.

In one embodiment, the redirection unit is further configured to redirect the CDN service request to the CDN edge node to which the user terminal belongs when the MEC to which the user terminal belongs is abnormal.

In an embodiment, the device further includes: a status judgment unit configured to periodically receive status information reported by the CDN service node; and determine whether the status of the CDN service node is normal according to the status information.

The embodiment of the present disclosure also provides a service scheduling device, which is applied to an access network device, and includes a memory, a processor, and a computer program stored on the memory and running on the processor. The computer program When executed by the processor, any one of the service scheduling methods executed by the access network device is realized.

The embodiment of the present disclosure also provides a service scheduling device, which is applied to the global load balancing server GSLB, and includes a memory, a processor, and a computer program stored in the memory and running on the processor. The computer When the program is executed by the processor, any one of the service scheduling methods executed by the global load balancing server GSLB is implemented.

The embodiments of the present disclosure also provide a computer-readable storage medium having an information processing program stored on the computer-readable storage medium, and a method for implementing any one of the foregoing business scheduling when the information processing program is executed by a processor A step of.

A person of ordinary skill in the art can understand that all or some of the steps, functional modules/units in the system, and apparatus in the methods disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may consist of several physical components. The components are executed cooperatively. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, and the computer-readable medium may include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile memory implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Flexible, removable and non-removable media. Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassette, tape, magnetic disk storage or other magnetic storage device, or Any other medium used to store desired information and that can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media usually contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as carrier waves or other transmission mechanisms, and may include any information delivery media .

Claims

A method for service scheduling, applied to access network equipment, includes:

Hijacking the CDN service request of the content distribution network sent by the user terminal, and replacing the source Internet Protocol IP address in the CDN service request with the network address translation NAT address;

The CDN service request after the replacement of the NAT address is forwarded to the global load balancing server GSLB, so that the GSLB redirects the CDN service request to the mobile edge computing MEC or CDN edge node to which the user terminal belongs; the user A CDN service node is set in the MEC to which the terminal belongs.
The method according to claim 1, wherein the performing NAT address replacement of the source IP address in the CDN service request comprises:

Replace the source IP address of the CDN service request with the IP address of the mobile edge computing MEC to which the user terminal belongs.
The method according to claim 1, wherein, before hijacking the CDN service request sent by the user terminal, the method further comprises:

Receive the CDN service request sent by the user terminal, and determine whether to hijack the CDN service request according to a preset strategy.
A business scheduling method applied to the global load balancing server GSLB, including:

Receive the CDN service request of the content distribution network of the user terminal;

Determine the MEC to which the user terminal belongs according to the Internet Protocol IP address of the mobile edge computing MEC carried in the CDN service request; the MEC to which the user terminal belongs is provided with a CDN service node;

When the status of the CDN service node is normal, redirect the CDN service request to the MEC to which the user terminal belongs.
The method according to claim 4, wherein, after redirecting the CDN service request to the MEC to which the user terminal belongs, the method further comprises:

The CDN service node provides CDN services to the user terminal.
The method according to claim 4, wherein the method further comprises:

When the state of the MEC to which the user terminal belongs is abnormal, the CDN service request is redirected to the CDN edge node to which the user terminal belongs.
The method according to claim 6, wherein after redirecting the CDN service request to the CDN edge node to which the user terminal belongs, the method further comprises:

The CDN edge node provides the CDN service to the user terminal.
The method according to claim 4, wherein the method further comprises:

Regularly receiving the status information reported by the CDN service node;

Determine whether the status of the CDN service node is normal according to the status information.
A service scheduling device applied to access network equipment, including:

The hijacking and replacement unit is configured to hijack the content delivery network CDN service request sent by the user terminal, and perform network address translation NAT address replacement for the source Internet Protocol IP address in the CDN service request;

A forwarding unit configured to forward the CDN service request after the NAT address is replaced to the global load balancing server GSLB, so that the GSLB redirects the CDN service request to the mobile edge computing MEC or CDN edge to which the user terminal belongs Node; The CDN service node is set in the MEC to which the user terminal belongs.
A service scheduling device applied to the global load balancing server GSLB, including:

The receiving unit is configured to receive a CDN service request of the content distribution network of the user terminal;

The determining unit is configured to determine the MEC to which the user terminal belongs according to the Internet Protocol IP address of the mobile edge computing MEC to which the user terminal belongs carried in the CDN service request; the MEC to which the user terminal belongs is provided with CDN service node;

The redirection unit is configured to redirect the CDN service request to the MEC to which the user terminal belongs when the status of the CDN service node is normal.
A service scheduling device, applied to access network equipment, including a memory, a processor, and a computer program stored on the memory and running on the processor, when the computer program is executed by the processor Implement the method of any one of claims 1 to 3.
A service scheduling device, applied to the global load balancing server GSLB, including a memory, a processor, and a computer program stored on the memory and running on the processor, the computer program being executed by the processor When realizing the method of any one of claims 4 to 8.
A computer-readable storage medium having an information processing program stored on the computer-readable storage medium, and when the information processing program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.