CN110958656A - CDN redirection method and system - Google Patents
CDN redirection method and system Download PDFInfo
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- CN110958656A CN110958656A CN201911168861.XA CN201911168861A CN110958656A CN 110958656 A CN110958656 A CN 110958656A CN 201911168861 A CN201911168861 A CN 201911168861A CN 110958656 A CN110958656 A CN 110958656A
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- H04W36/0005—Control or signalling for completing the hand-off
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- H—ELECTRICITY
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- H—ELECTRICITY
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Abstract
The invention provides a method and a system for redirecting a CDN content delivery network, relates to the technical field of communication, and is used for solving the problem that an edge service node in the prior art cannot be flexibly redirected. The method comprises the following steps: the first edge service node confirms that a base station connected with a target terminal is changed, generates CDN redirection information and sends the CDN redirection information to a scheduling control network element; the method comprises the steps that a scheduling control network element receives CDN redirection information sent by a first edge service node and determines an available second edge service node; then, the scheduling control network element sends a second service request of the target terminal to a second edge service node, and the second edge service node provides the target terminal with the service of the CDN service; and the scheduling control network element sends the access address information of the second edge service node to the target terminal. The invention is suitable for the scene of switching the base station by the terminal.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a system for CDN redirection.
Background
The popularization of the 5G technology enables high-traffic mobile applications to be realized and gradually moves to the popularization, and the congestion of terminal equipment and service requests also tends to cause network congestion. Content Delivery Network (CDN) technology has been used to alleviate network congestion problems. The CDN technology refers to a content delivery network built on a network, and by means of edge servers deployed in various regions, a user can obtain required content nearby through functions of load balancing, content delivery, scheduling, and the like of a central platform, thereby improving overall delivery efficiency, reducing network delay, and saving bandwidth resources.
The current CDN is not enough to meet the application requirement of the 5G era, and the CDN must be changed and sunk into a 5G network to form a smaller and denser CDN deployment node. The CDN service nodes deployed in the 5G edge cloud can only serve terminal users under the 5G base station within a certain range, the IP addresses of the terminals under the mobile network and the intranet addresses of the mobile network in each large operation are mostly adopted by the CDN service nodes in the edge cloud, and when the terminal users are switched in different edge service node coverage ranges, the CDN scheduling technology and the system in the current stage cannot accurately schedule user requests to nodes with the optimal service capacity. Therefore, in the process of terminal movement, the CDN at the present stage cannot flexibly redirect an edge service node, and thus cannot accurately schedule a node with the best service capability.
Disclosure of Invention
The invention provides a CDN redirection method and a CDN redirection system, which are used for solving the problems that a CDN at the present stage cannot flexibly redirect edge service nodes and cannot accurately schedule a node with the optimal service capability for a terminal.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a CDN redirection method, including: the scheduling control network element receives a second service request sent by the first edge service node, the second service request is used for indicating a target terminal to request for carrying out CDN service, the second service request comprises a second base station identifier, and the first edge service node does not provide service for a terminal connected with the second base station; the scheduling control network element determines a second edge service node according to the second base station identifier, and the second edge service node can provide service for a terminal connected with the second base station; the scheduling control network element sends a second service request to a second edge service node; and the scheduling control network element sends the access address information of the second edge service node to the target terminal.
Based on the above technical solution, since the first edge service node does not provide service to the terminal connected to the second base station, the first edge service node cannot respond to the second service request carrying the identifier of the second base station. In this case, the scheduling control network element receives the second service request sent by the first edge service node, and determines the second edge server node according to the second service request. Then, the scheduling control network element sends a second service request to a second edge service node; and the scheduling control network element sends the access address information of the second edge service node to the target terminal. Therefore, the second edge service node can establish connection with the target terminal, so that the target terminal can still normally execute the CDN service after the target terminal is switched to the second base station. The technical scheme of the invention can flexibly redirect the edge service node for the terminal so as to ensure that the terminal can obtain the CDN service provided by the optimal edge service node in the moving process.
In one possible design, the method further includes: and the scheduling control network element receives CDN redirection information sent by the first edge service node, wherein the CDN redirection information is used for indicating the redirection edge service node.
In one possible design, the determining, by the scheduling control network element, the second edge serving node according to the second base station identifier includes: and the scheduling control network element determines the second edge service node according to the second base station identifier and the corresponding relation between the pre-stored base station identifier and the edge service node.
In a second aspect, the present invention provides a CDN redirection method, including: and the first edge service node receives a second service request sent by the service control network element, the second service request is used for indicating a target terminal to request for carrying out CDN service, the second service request comprises a second base station identifier, and the first edge service node does not provide service for a terminal connected with the second base station. And the first edge service node determines that the target terminal has switched the base station according to the second service request. And the first edge service node sends a second service request to the scheduling control network element so that the scheduling control network element redirects the edge service node as the target terminal.
Based on the above technical solution, the first edge service node receives the second service request sent by the service control network element. Since the second service request includes the second base station identification and the first edge serving node does not provide service to the terminal connected to the second base station, the first edge serving node may determine that the target terminal has performed base station handover. In the case where the target terminal is handed over to the second base station, since the first edge service node cannot provide a service to the target terminal, the CDN needs to redirect the edge service node for the target terminal. Based on this, the first edge service node sends the second service request to the scheduling control network element, so that the scheduling control network element redirects the edge service node for the target terminal. Therefore, the target terminal can perform the CDN service with the optimal service node, and the normal execution of the CDN service of the target terminal is ensured. Therefore, the technical scheme of the invention can flexibly redirect the edge service node for the terminal so as to ensure that the terminal can obtain the CDN service provided by the optimal edge service node in the moving process.
In one possible design, the first edge service node sends CDN redirection information to the scheduling control network element, where the CDN redirection information is used to indicate a redirection edge service node.
In a third aspect, the present invention provides a communication apparatus, comprising: a receiving unit, configured to receive a second service request sent by the first edge serving node, where the second service request is used to indicate a redirection edge serving node, the second service request includes a second base station identifier, and the first edge serving node does not provide a service to a terminal connected to the second base station. And the processing unit is used for determining a second edge service node according to the second base station identifier, and the second edge service node can provide service for the terminal connected with the second base station. A sending unit, configured to send a second service request to a second edge service node; and sending the access address information of the second edge service node to the target terminal.
In a possible design, the receiving unit is further configured to receive CDN redirection information sent by the first edge service node, where the CDN redirection information is used to indicate a redirection edge service node.
In a possible design, the processing unit is further configured to determine the second edge service node according to the identifier of the second base station and a correspondence between the identifier of the base station and the edge service node, which is stored in advance.
In a fourth aspect, the present invention provides a communication apparatus, comprising: the receiving unit is configured to receive a second service request sent by a service control network element, where the second service request is used to instruct a target terminal to request for performing a CDN service, the second service request includes a second base station identifier, and a first edge service node does not provide a service to a terminal connected to the second base station. And the processing unit is used for determining that the target terminal has switched the base station according to the second service request. The sending unit is configured to send the second service request to the scheduling control network element, so that the scheduling control network element redirects the edge service node as the target terminal.
In a possible design, the sending unit is further configured to send CDN redirection information to a scheduling control network element, where the CDN redirection information is used to indicate a redirection edge service node.
In a fifth aspect, the present invention provides a communication device comprising a processor and a communication interface; the communication interface is coupled to a processor for executing a computer program or instructions for implementing the CDN redirection method as described in the first aspect, any of the possible implementations of the first aspect, the second aspect, and any of the possible implementations of the second aspect.
In a sixth aspect, the present invention provides a computer-readable storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the CDN redirection method described in the first aspect, any one of the possible implementations of the first aspect, the second aspect, and any one of the possible implementations of the second aspect.
In a seventh aspect, the present invention provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the CDN redirection method described in the first aspect, any one of the possible implementations of the first aspect, the second aspect, and any one of the possible implementations of the second aspect.
In an eighth aspect, the present invention provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a computer program or instructions to implement the CDN redirection method as described in the first aspect, any possible implementation manner of the first aspect, the second aspect, and any possible implementation manner of the second aspect.
In a ninth aspect, the present invention provides a communication system comprising a first edge serving node and a scheduling control network element. The scheduling control network element is configured to execute the CDN redirection method described in any one of the first aspect and any one of the possible implementation manners of the first aspect. The first edge service node is configured to perform the CDN redirection method described in the second aspect and any possible implementation manner of the second aspect.
Drawings
Fig. 1 is a schematic architecture diagram of a 5G network according to an embodiment of the present invention;
fig. 2 is a flowchart of a CDN service redirection method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a communication device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another communication device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship. For example, A/B may be understood as A or B.
The terms "first" and "second" in the description and claims of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first edge service node and the second edge service node are used for distinguishing different edge service nodes, and are not used for describing the characteristic sequence of the edge service nodes.
Furthermore, the terms "comprising" and "having" and any variations thereof as referred to in the description of the invention are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In addition, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "e.g.," is intended to present concepts in a concrete fashion.
In order to facilitate understanding of the technical solutions of the present invention, some technical terms are described below.
1. Global load balancing
Global load balancing (gsl.b) is primarily aimed at directing user requests to the nearest node or area throughout the network. Thus, proximity determination is the primary function of global load balancing. Local load balancing is generally limited to a certain area, and the goal is to find a most suitable node to provide service in a specific area.
Global load balancing classification: based on DNS implementation, based on redirection implementation, based on routing protocol implementation. The method is characterized in that the availability of the server can be determined by judging the load of the server, including data such as CPU occupation, bandwidth occupation and the like, and the link condition between an access user and the server can be judged at the same time, so that the server with the best link condition can be selected. Therefore, the global load balancing is to comprehensively judge the server and the link to determine which server provides the service, so as to ensure the service quality of the remote server group.
Global load balancing is applied to all systems with multiple sites, and the most common is a traffic scheduling system as a core in a CDN system.
2. Business management
Service management is an important part of network management, and the related aspects are relatively wide. At this management layer, most of the management information is directly exchanged between each network unit of the global system for mobile communications (GSM) system and the GSM network management facility. These management information also include security data managed by an authentication center (AUC), customer data managed by a Home Location Register (HLR), billing and accounting data managed by a Main Service Channel (MSC), and the like.
3. Edge service node
The edge service node is a logic abstraction of basic common capability of a plurality of product forms of the edge side such as an edge gateway, an edge controller and an edge server, and the product forms have common capability of real-time data analysis, local data storage, real-time network connection and the like of the edge side.
In the invention, the edge service node is deployed in a 5G network access machine room behind a 5G base station, and a general layered software structure is adopted. One edge service node may serve multiple 5G base stations. The edge service node stores resources such as various files, videos, webpages, pictures and the like and serves the terminal. Illustratively, the terminal may include: smart phones, vehicle-mounted devices, tablet computers, and the like.
In the prior art, CDN technology is used to alleviate the network congestion problem. The CDN is suitable for accessing static resources with a certain magnitude, and comprises static resources of all file formats such as html, js, css, apk, mp3, flv, jpg, gif, mp4, flv and the like. However, the current CDN is not sufficient to meet the application requirements of the 5G era, a CDN service node deployed in a 5G edge cloud can only serve terminal users under a 5G base station within a certain range, and an IP address of a terminal under a mobile network and an intranet address of a mobile network over each large operation are mostly used for the CDN service node in the edge cloud, and when a terminal user switches over within the coverage range of different 5G edge cloud service nodes, the CDN scheduling technology and system at the present stage cannot accurately schedule a user request to a node with the best service capability. Therefore, CDNs must be revolutionized and sunk into 5G networks, resulting in smaller, denser CDN deployment nodes.
In order to solve the technical problem that the CDN edge service node cannot be flexibly redirected and therefore cannot be accurately scheduled to the edge service node with the optimal service capability, embodiments of the present invention provide a CDN service redirection method and apparatus.
The technical scheme provided by the embodiment of the invention can be applied to various communication systems, such as a 5G communication system, a future evolution system or a plurality of communication fusion systems and the like.
In addition, the network architecture and the service scenario described in the embodiment of the present invention are for more clearly illustrating the technical solution of the embodiment of the present invention, and do not constitute a limitation to the technical solution provided in the embodiment of the present invention, and it can be known by those skilled in the art that the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of a new service scenario.
As shown in fig. 1, the present invention is an architecture of a 5G network to which the technical solution provided by the embodiment of the present invention is applied. The 5G network may include: the system comprises a target terminal, a Base Station (BS), a 5G Core Network (CN), an edge service node, a service management network element, and a scheduling control network element.
The target terminal may be a terminal device with a wireless transceiving function. A terminal may have different names such as User Equipment (UE), access terminal, terminal unit, terminal station, mobile station, remote terminal, mobile device, wireless communication device, terminal agent, or terminal device, etc. The terminal can be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal comprises a handheld device, a vehicle-mounted device, a wearable device or a computing device with wireless communication function. Illustratively, the terminal may be a mobile phone (mobile phone), a tablet computer or a computer with wireless transceiving function. The terminal device may also be a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and so on. In the embodiment of the present invention, a device for implementing a function of a terminal is taken as an example, and a technical solution provided in the embodiment of the present invention is described.
The base stations may include various forms of base stations, such as: macro base stations, micro base stations (also referred to as small stations), relay stations, access points, etc. The method specifically comprises the following steps: the base Station may be an Access Point (AP) in a Wireless Local Area Network (WLAN), a base Station (BTS) in a Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA), a base Station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA), an Evolved Node B (eNB, eNodeB) in LTE, or a relay Station or Access point, or a base Station in a vehicle-mounted device, a wearable device, and a Next Generation Node B (The Next Generation Node B, gbb) in a future 5G Network, or a base Station in a future Evolved Public Land Mobile Network (PLMN) Network.
The service management network element may be a network element with a service management function, and is mainly responsible for managing the target terminal: the method mainly comprises the functions of authentication, terminal identification and the like.
The scheduling control network element can be a network element with a global load balancing function, and is mainly responsible for scheduling a target terminal to an edge service node with the best service capability, and realizing accurate scheduling based on regional scheduling policy configuration.
The service management network element and the scheduling control network element are deployed on the 5G core network side, the edge service node is deployed in a 5G network access machine room behind the 5G base station, and a general layered software structure is adopted.
The technical scheme provided by the invention is specifically explained in the following by combining the drawings in the specification.
As shown in fig. 2, a CDN service redirection method provided in an embodiment of the present invention includes the following steps:
s101, the target terminal accesses a network through the first base station.
As a possible implementation manner, when the target terminal moves into the coverage of the first base station, the target terminal may initiate a corresponding procedure (e.g., a registration procedure) to access the network through the first base station.
S102, the target terminal sends a first service request to a service management network element.
The first service request is used for requesting execution of a CDN service, and the CDN service is used for requesting acquisition of information such as files, videos and images required by a target terminal.
Illustratively, the first service request may include: the terminal identification, the current base station identification and the service account number information. The service account information is account information of the CDN service.
It will be appreciated that the current base station identity included in the first service request is the first base station identity.
In one possible implementation manner, the target terminal sends the first service request to the service management network element through the 5G core network. Illustratively, a target terminal firstly sends a first service request to a 5G core network; and then, the 5G core network forwards the first service request to the service management network element through a routing forwarding protocol.
S103, the service management network element sends a first service request to the scheduling control network element.
As a possible implementation manner, the service management network element analyzes the first service request, and acquires a terminal identifier, a current base station identifier and service account information; and then, the service management network element verifies the service account information. And under the condition that the service account information passes the verification, the service management network element forwards the first service request to the scheduling control network element.
S104, the scheduling control network element determines a first edge service node according to the first service request.
As a possible implementation manner, after receiving the first service request, the scheduling control network element parses the first service request, and obtains the terminal identifier, the current base station identifier, and the service account information. And then, the scheduling control network element determines the first edge service node according to the current base station identifier (namely the first base station identifier) and the corresponding relation between the base station identifier and the edge service node.
It should be noted that the correspondence between the base station identifier and the edge service node may be implemented in the form of a table, or may be implemented in the form of information of a serviceable base station. The information of the serviceable base station corresponding to the edge service node comprises the identification of the base station corresponding to the edge service node.
(1) For example, the correspondence between the base station identifier and the edge service node may be in the form of table one.
Watch 1
| Base station identification | Edge service node |
| First base station identification | First edge service node |
| Second base station identity | Second edge service node |
| Third base station identity | Third edge service node |
| Fourth base station identity | Fourth edge service node |
| …… | …… |
| Nth base station identification | Nth edge service node |
(2) When the corresponding relationship between the base station identifier and the edge service node is implemented in the form of serviceable base station information, the scheduling control network element determines the first edge service node according to the current base station identifier (i.e. the first base station identifier) and the corresponding relationship between the base station identifier and the edge service node, which can be specifically implemented as follows: and the scheduling control network element determines target serviceable base station information from the plurality of serviceable base station information according to the first base station identification, wherein the target serviceable base station information comprises the first base station identification. Furthermore, the scheduling control network element can determine that the edge service node corresponding to the target serviceable base station information is the first edge service node.
S105, the scheduling control network element sends the access address information of the first edge service node to the target terminal.
Optionally, the node information of the first edge service node includes: service content information, access address information, current load information, and serviceable base station information.
The service content information is used for indicating all service types which can be provided by the edge service node for the target terminal. The access address information is used for indicating network address information required by the target terminal when accessing the edge service node. The current load information is used to indicate the number of terminals served by the edge service node.
Optionally, after the service management network element receives the node information of the first edge service node, the service management network element may establish and store a corresponding relationship between the target terminal and the first edge service node, so that the service management network element determines that the first edge service node is an edge service node providing services to the target terminal.
As a possible implementation manner, the scheduling control network element first sends node information of the first edge service node to the service management network element; and then, the service management network element sends the access address information of the first edge service node to the target terminal according to the node information of the first edge service node.
Optionally, the first edge service node caches the access address information of the first edge service node in the local database.
Optionally, in addition to the access address information of the first edge service node, the service management network element may also send the service content information of the first edge service node to the target terminal.
Optionally, the service management network element may further forward the first service request to the first edge service node.
It is understood that based on the above steps S101-S105, CDN traffic may be performed between the target terminal and the first edge service node.
And S106, the target terminal is switched from the first base station to the second base station.
As a possible implementation manner, the target terminal may leave the coverage of the first base station and enter the coverage of the second base station during the moving process. In this case, the target terminal may initiate a corresponding procedure (e.g., a handover procedure or an RRC reestablishment procedure) to handover from the first base station to the second base station.
As another possible implementation manner, due to some reasons (e.g., object occlusion), the communication quality between the target terminal and the first base station is poor, so to ensure normal communication of the target terminal, the target terminal may initiate a corresponding procedure (e.g., a handover procedure or an RRC reestablishment procedure) to handover from the first base station to the second base station.
S107, the target terminal sends a second service request to the service management network element.
And the second service request is used for requesting to execute the CDN service.
As a possible implementation manner, after the target terminal is switched from the first base station to the second base station, when the target terminal needs to perform the CDN service, the target terminal may initiate a second service request.
It is to be understood that the second service request may include: the terminal identification, the current base station identification and the service account number information. The service account information is account information of the CDN service.
In a possible implementation manner, after the target terminal is handed over from the first base station to the second base station, and before the target terminal is redirected to the second edge service node, the target terminal sends the second service request to the service management network element through the 5G core network. Illustratively, the target terminal firstly sends a second service request to the 5G core network; and then, the 5G core network forwards the second service request to the service management network element through a routing forwarding protocol.
Optionally, after the target terminal sends the second service request to the service management network element through the 5G core network, the service management network element forwards the second service request to the first edge service node.
The second service request is sent to the 5G core network. And the 5G core network forwards the second service request to the first edge service node through the service management network element by utilizing a route forwarding protocol.
It should be noted that, at this time, the target terminal is connected and switched to the second base station, but the CDN service redirection is still not completed, and still needs to be connected to the first edge service node through the 5G core network.
Optionally, the target terminal may further send the access address information of the first edge service node, which is cached in advance, to the service management network element, so that the target terminal and the first edge service node are quickly connected.
S108, the service management network element sends a second service request to the first edge service node.
As a possible implementation manner, when the service management network element stores the corresponding relationship between the target terminal and the first edge service node, the service management network element may determine the node information of the first edge service node according to the terminal identifier in the second service request, and then the service management network element may send the second service request to the first edge service node.
As a possible implementation manner, in a case that the target terminal further sends the access address information of the first edge service node to the service management network element, the service management network element may send the second service request to the first edge service node according to the access address information of the first edge service node.
It should be noted that, the first edge service node receives the second service request forwarded by the service management network element, and serves the target terminal before the target terminal is redirected to the second edge service node, so that the target terminal ensures continuity of the service with a small amount of 5G core network traversal traffic before being redirected to a new edge service node.
And S109, the first edge service node determines that the target terminal has switched the base station according to the second service request.
It can be understood that, since the second base station identifier carried in the second service request is different from the first base station identifier carried in the first service request, the first edge serving node may determine that the target terminal has switched the base station.
S110, under the condition that the target terminal has switched the base station, the first edge service node sends a second service request to the scheduling control network element.
Optionally, after the first edge service node determines that the target terminal has been switched from the first base station to the second base station, the first edge service node actively sends the second service request to the scheduling control network element, so that the scheduling control network element starts the CDN service redirection process.
Optionally, the first edge service node sends CDN redirection information to the scheduling control network element, where the CDN redirection information is used to indicate a redirection edge service node.
And S111, the scheduling control network element determines a second edge service node according to the second service request.
Step S111 is similar to step S104, and the specific implementation process thereof may refer to the description of step S104, which is not described herein again.
And S112, the scheduling control network element sends the access address information of the second edge service node to the target terminal.
As a possible implementation manner, the scheduling control network element first sends node information of the second edge service node to the service management network element; and then, the service management network element sends the access address information of the second edge service node to the target terminal according to the node information of the second edge service node.
Optionally, in addition to the access address information of the second edge service node, the service management network element may also send the service content information of the second edge service node to the target terminal.
It should be noted that, after the target terminal receives the access address information of the second edge service node, the target terminal may establish a connection with the second edge service node according to the access address information of the second edge service node, so that the target terminal may perform CDN services with the second edge service node.
Optionally, the target terminal accesses the second edge service node according to the access address information of the second edge service node while locally caching part of the content. The content of the local cache part of the target terminal is a local cache mechanism in general service application, information can be cached on one side of the target terminal in advance, the smooth operation of the service is guaranteed, and the method belongs to a common application side guarantee mode.
S113, the service management network element forwards the second service request to the second edge service node.
It can be understood that, through steps S101 to S113, when the target terminal is switched from the first base station to the second base station and the current edge service node is unavailable, the scheduling control network element can implement that the target terminal is continuously served by switching from the first edge service node to the second edge service node, so as to perform CDN redirection between edge service nodes switched by the 5G base stations, and enable the target terminal to accurately schedule the edge service node with the best service capability during base station switching. Compared with the prior art, the method avoids the conditions that the side length of the service access path of the target terminal is long, the time delay is increased, and the response speed is slowed down, can reduce the crossing flow in the 5G mobile network, saves network resources, and improves the value of the CDN edge service node.
In the embodiment of the present invention, according to the above method, the functional modules or the functional units of the communication device for redirecting the CDN service may be divided, for example, each functional module or each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module may be implemented in a form of hardware, or may be implemented in a form of a software functional module or a functional unit. The division of the modules or units in the embodiments of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
As shown in fig. 3, a schematic structural diagram of a communication device 30 provided in an embodiment of the present invention is used for executing the CDN service redirection method, where the communication device 30 includes:
a receiving unit 301, configured to receive a second service request sent by a first edge serving node, where the second service request is used to indicate a redirection edge serving node, the second service request includes a second base station identifier, and the first edge serving node does not provide a service to a terminal connected to a second base station;
a processing unit 302, configured to determine a second edge service node according to the second base station identifier, where the second edge service node is capable of providing a service to a terminal connected to the second base station;
a sending unit 303, configured to send a second service request to a second edge serving node;
optionally, the sending unit 303 is further configured to send the access address information of the second edge service node to the target terminal.
Optionally, the receiving unit 301 is further configured to receive CDN redirection information sent by the first edge service node, where the CDN redirection information is used to indicate a redirection edge service node.
Optionally, the processing unit 302 is further configured to determine the second edge service node according to the identifier of the second base station and a correspondence between the identifier of the base station and the edge service node, which are stored in advance.
As shown in fig. 4, a schematic structural diagram of a communication device 40 provided in an embodiment of the present invention is used for executing the CDN service redirection method, where the communication device 40 includes:
a receiving unit 401, configured to receive a second service request sent by a service control network element, where the second service request is used to indicate a target terminal to request for performing a CDN service, the second service request includes a second base station identifier, and a first edge service node does not provide a service to a terminal connected to a second base station.
A processing unit 402, configured to determine that the target terminal has switched the base station according to the second service request.
A sending unit 403, configured to send the second service request to the scheduling control network element, so that the scheduling control network element redirects the edge service node as the target terminal.
Optionally, the sending unit 403 is further configured to send CDN redirection information to the scheduling control network element, where the CDN redirection information is used to indicate a redirection edge service node.
Fig. 5 shows a schematic diagram of another possible structure of the communication device according to the above-described embodiment. The device includes: a processor 502 and a communication interface 503.
In the case where the communication device shown in fig. 3 is implemented as the communication device shown in fig. 5, the processor 502 is configured to control and manage the actions of the device, for example, to perform the steps performed by the processing unit 302 described above, and/or to perform other processes for the techniques described herein. The communication interface 503 is used to support the communication of the apparatus with other network entities. For example, the steps performed by the receiving unit 301. The communication device may further comprise a memory 501 and a bus 504, the memory 501 being used for storing program codes and data of the device.
In the case where the communication device shown in fig. 4 is implemented as the communication device shown in fig. 5, the processor 502 is configured to control and manage the actions of the device, for example, to perform the steps performed by the processing unit 402 described above, and/or to perform other processes for the techniques described herein. The communication interface 503 is used to support the communication of the apparatus with other network entities. For example, the steps performed by the receiving unit 301. The communication device may further comprise a memory 501 and a bus 504, the memory 501 being used for storing program codes and data of the device.
The processor 502 may implement or execute various exemplary logical blocks, units and circuits described in connection with the present disclosure. The processor may be a central processing unit, general purpose processor, digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, units, and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others.
The bus 504 may be an Extended Industry Standard Architecture (EISA) bus or the like. The bus 504 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.
It is clear to those skilled in the art from the foregoing description of the embodiments that, for convenience and simplicity of description, the foregoing division of the functional units is merely used as an example, and in practical applications, the above function distribution may be performed by different functional units according to needs, that is, the internal structure of the device may be divided into different functional units to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
The embodiment of the present invention further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed by a computer, the computer executes each step in the method flow shown in the above method embodiment.
The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, and a hard disk. Random Access Memory (RAM), Read-Only Memory (ROM), Erasable Programmable Read-Only Memory (EPROM), registers, a hard disk, an optical fiber, a portable Compact disk Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any other form of computer-readable storage medium, in any suitable combination, or as appropriate in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). In embodiments of the invention, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A CDN redirection method for a content delivery network is characterized in that the method is applied to a scheduling control network element, the scheduling control network element is positioned in a CDN system, and the method comprises the following steps:
a scheduling control network element receives a second service request sent by a first edge service node, wherein the second service request is used for indicating a target terminal to request for performing CDN service, the second service request comprises a second base station identifier, and the first edge service node does not provide service for a terminal connected with the second base station;
the scheduling control network element determines a second edge service node according to the second base station identifier, wherein the second edge service node can provide service for a terminal connected with the second base station;
the scheduling control network element sends the second service request to the second edge service node;
and the scheduling control network element sends the access address information of the second edge service node to the target terminal.
2. The CDN redirection method of claim 1, wherein the method further comprises:
and the scheduling control network element receives CDN redirection information sent by the first edge service node, wherein the CDN redirection information is used for indicating a redirection edge service node.
3. The CDN redirection method of claim 2, wherein the determining, by the scheduling control network element according to the second base station identifier, a second edge service node comprises:
and the scheduling control network element determines the second edge service node according to the second base station identifier and the corresponding relation between the pre-stored base station identifier and the edge service node.
4. A CDN redirection method is characterized by comprising the following steps:
a first edge service node receives a second service request sent by a service control network element, wherein the second service request is used for indicating a target terminal to request for performing CDN service, the second service request comprises a second base station identifier, and the first edge service node does not provide service for a terminal connected with the second base station;
the first edge service node determines that the target terminal has switched the base station according to the second service request;
and the first edge service node sends a second service request to the scheduling control network element so that the scheduling control network element redirects the edge service node as the target terminal.
5. The CDN redirection method of claim 4, wherein the method further comprises:
and the first edge service node sends CDN redirection information to a scheduling control network element, wherein the CDN redirection information is used for indicating a redirection edge service node.
6. A communication apparatus, characterized in that the communication apparatus comprises: a receiving unit, a processing unit and a transmitting unit;
the receiving unit is configured to receive a second service request sent by a first edge service node, where the second service request is used to indicate a redirection edge service node, the second service request includes a second base station identifier, and the first edge service node does not provide a service to a terminal connected to the second base station;
the processing unit is configured to determine a second edge service node according to the second base station identifier, where the second edge service node is capable of providing a service to a terminal connected to the second base station;
the sending unit is configured to send the second service request to the second edge serving node; and sending the access address information of the second edge service node to the target terminal.
7. The communication device of claim 6,
the receiving unit is further configured to receive CDN redirection information sent by the first edge service node, where the CDN redirection information is used to indicate a redirection edge service node.
8. The communication device of claim 7,
the processing unit is further configured to determine the second edge service node according to the second base station identifier and a correspondence between the identifier of the base station and the edge service node, which is stored in advance.
9. A communication apparatus, characterized in that the communication apparatus comprises: a receiving unit, a processing unit and a transmitting unit;
the receiving unit is configured to receive a second service request sent by a service control network element, where the second service request is used to instruct a target terminal to request for performing a CDN service, the second service request includes a second base station identifier, and a first edge service node does not provide a service to a terminal connected to the second base station;
the processing unit is used for determining the switched base station of the target terminal according to the second service request;
the sending unit is configured to send the second service request to the scheduling control network element, so that the scheduling control network element redirects the edge service node as the target terminal.
10. The communication device of claim 9,
the sending unit is further configured to send CDN redirection information to the scheduling control network element, where the CDN redirection information is used to indicate a redirection edge service node.
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