KR102147053B1 - Method for API of CDN service and apparatus therefor - Google Patents

Abstract

The present invention provides an API based on a content delivery service that enables a variety of additional services to be provided using a plurality of cache devices by supporting access to a cache device distributed in a communication network to obtain information for a content delivery service. The present invention relates to a provision method and a cache device therefor, wherein the present invention stores different service information for each cache device distributed in a communication network, and when each cache device detects a request message from a user device transmitted through a different path, , The cache device that detects the request message of the user device compares whether the destination address information of the request message matches the specific address information preset for the content delivery service-based API, and if it matches, the cache device stores it. It is implemented to transmit service information to the user device.

Description

A method for providing API based on a content delivery service, and a cache apparatus therefor.

The present invention relates to a content delivery network (CDN), and more particularly, an API (Application Programming Interface) based on a content delivery service that supports obtaining specific information by accessing a cache device of a content delivery service. It relates to a providing method and a cache device therefor.

The CDN service is a service for stably delivering various contents including moving pictures such as movies and music videos to users. Usually, contents are stored in a plurality of cache devices distributed on the network in advance, and GLB (Global Load Balance) ) Through a load balancing device such as a server, an optimal cache device is selected from among a plurality of cache devices, and the requested content is delivered to the user's terminal through the selected cache device.

These CDNs were implemented to resolve data loss, bottlenecks, transmission speed degradation, and instability such as data loss on the Internet based on the Internet network.

In addition, in recent years, the IETF standardizes CDNi (Contents Delivery Network interconnection) in order to link CDNs built by different service providers.

On the other hand, due to the spread of smart phones with improved performance and the rapid increase of content providers based on this, the traffic of mobile communication networks is gradually increasing, and accordingly, Web download, video, audio ( A service quality problem due to a decrease in the transmission speed of contents such as audio), image, application, etc. is an issue. In particular, as content delivery technology develops and users' demand for high-quality services increases, large-capacity content transmission has become frequent in online video services such as VOD (Video On Demand) and Live Streaming, music streaming, file uploading, and file download. .

Accordingly, attempts have been made to incorporate CDN services into mobile networks including mobile communication networks.

In accordance with this trend, a content delivery system including a plurality of cache devices has been established in wired networks and wired networks, but the existing content delivery service is operated only for the purpose of fast content transmission and traffic reduction, and interlocks with other services. Is not considered at all.

Korean Patent Laid-Open Patent No. 10-2001-0074186, published on Aug. 04, 2001 (Name: Method for providing CDN service through wireless network)

The present invention has been proposed in order to solve the conventional problem, and an object of the present invention is to provide a content delivery service-based API providing method and a cache device therefor that support a specific function of a content delivery service to be used by other services.

In particular, the present invention is based on a content delivery service that enables a variety of additional services to be provided using a plurality of cache devices by supporting access to a cache device distributed in a communication network to obtain information for a content delivery service. It relates to a method of providing an API and a cache device therefor.

As a means for solving the above-described problem, the present invention includes the steps of storing one or more service information distributed for each cache device in one or more cache devices distributed over a communication network; Each cache device detecting a request message of a user device transmitted through a different path; Comparing, by the cache device detecting the request message of the user device, whether destination address information of the request message matches at least one specific address information preset for an API based on a content delivery service; And when the destination address information of the request message matches any one specific address information, the cache device detecting the request message sends service information corresponding to the specific address information matching the destination address information of the request message to the user. It provides a method for providing an API based on a content delivery service including transmitting to a device.

In addition, the present invention provides another solution to the above-described problem, comprising: a storage unit for storing one or more service information distributed for each cache device distributed in a communication network, together with one or more contents to be provided as a content delivery service; A communication interface unit for collecting transmission/reception data of a user device transmitted through the communication network and transmitting data to the user device; And monitoring transmission/reception data of the user device collected through the communication interface unit, and when a request message from the user device is detected, compares the destination address information of the request message with one or more specific address information set for an API based on a content delivery service. Thus, when it matches any one of the specific address information, for providing a content delivery service-based API including a control unit for transmitting service information corresponding to specific address information matching the destination address information of the request message to the user device. Provide a cache device.

The present invention has an excellent effect of providing various additional services using a plurality of cache devices by supporting access to cache devices distributed in a communication network to obtain information for a content delivery service.

In particular, the present invention stores predetermined information, for example, area information, in a cache device arranged in units of a wireless access network covering different areas of a mobile network, and a specific application or a specific service accesses the cache device. Thus, by collecting the area information, it supports to provide a service based on area information.

For example, a chat or game service provider accesses a cache device arranged in units of a wireless access network of a mobile network and receives area information, thereby classifying the area where each user device is located and performing user grouping in the area. When providing the base weather information, the user device can obtain the region-based weather information by accessing the cache device connected to the wireless access network to which it is connected without accessing the service server.

1 is a block diagram schematically showing the structure of a content delivery system according to the present invention.
2 is a block diagram showing the configuration of a cache device provided in the content delivery system according to the present invention.
3 is a flow chart showing an operation process of a cache device supporting an API based on a content delivery service according to the present invention.
4 is a block diagram showing the configuration of a user device using an API based on a content delivery service according to the present invention.
5 is a block diagram showing the structure of a service application included in a user device according to the present invention.
6 is a flowchart illustrating a service execution process based on an API based on a content delivery service by a user device according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the following description and the accompanying drawings, detailed descriptions of known functions or configurations that may obscure the subject matter of the present invention will be omitted. In addition, it should be noted that the same components are indicated by the same reference numerals as possible throughout the drawings.

1 is a block diagram schematically showing the structure of a content delivery system according to the present invention.

For reference, in the following description, in order to distinguish between the communication network in which the content delivery system is established and other external networks, the communication network in which the content delivery system is established is referred to as the first communication network 10, and other networks other than the first communication network Will be described by dividing it into a second communication network 20.

In particular, in an embodiment of the present invention, the first communication network 10 is a communication network in which a content delivery system according to the present invention is built, and the second communication network 20 uses an API based on a content delivery service according to the present invention. It represents a communication network to which the service server 300 providing a predetermined additional service is connected by using.

In particular, in the present invention, the first communication network 10 may be a mobile network wirelessly connected to the user device 100, and the second communication network 20 may be an IP-based communication network, especially an Internet network. have. For reference, the mobile network is a communication network implemented so that a user can use a communication service while moving, and not only mobile communication networks such as LTE (Long Term Evolution) networks and WCDMA networks, which are currently commercialized, but also Wi-Fi networks. It may include various types of wireless networks and combinations thereof.

The first communication network 10 is a core network for connecting a plurality of wireless access networks 11 and the plurality of wireless access networks 11 or an external network, specifically, a second communication network 20 ( 12) can be included.

The wireless access network 11 is an access network that performs wireless communication with a user device 100 representing a terminal device capable of accessing a mobile network, such as a mobile phone or a smart phone, and includes, for example, a base station (BS), a base transceiver (BTS). Station), a plurality of base stations such as NodeB, eNodeB, and the like, and a wireless access device 11a such as a base station controller such as a base station controller (BSC) and a radio network controller (RNC). The plurality of wireless access networks 11 have regionally divided communication coverage, and support data transmission/reception of the user device 100 located within the communication coverage.

In addition, the core network 12 is a network system that performs major functions for mobile communication services such as call processing, mobility control and switching between wireless access networks 11, and may be implemented with various functional elements. In 1, only the Evolved Packet Core (EPC) 12a and the switch devices 12c to 12d required for the description of the content delivery service according to the present invention are shown.

The packet core device 12a manages and controls the packet flow in the first communication network 10, and also performs interworking with the first communication network 10 and an external network, that is, the second communication network 20. .

In addition, the second communication network 20 is a common open communication network in which information is exchanged according to the TCP/IP protocol, and may be established through one or more of wired, wireless, and optical communication technologies, and instant message service and online game service , Internet portal service, social network service, e-commerce service, service server 300 for various services such as VOD service is connected to the second communication network 20, it is possible to provide services based on the second communication network 20 have. In this case, the user device 100 may access the service server 300 of the second communication network 20 through the first communication network 10 and receive a predetermined service or function of the service server 300.

In such a network configuration, the content delivery system according to the present invention includes a plurality of cache devices 200 distributed in the first communication network 10. The plurality of cache devices 200 may be divided into an edge cache device 210 disposed in units of the wireless access network 11 and a core cache device 220 disposed in the core network 12.

The edge cache device 210 is connected to the connection point between the wireless access network 11 and the core network 12 through a switch device 12b, and transmits/receives data of the user device 100 connected to the wireless access network 11. It can be monitored, and content can be transmitted to the user device 100 through the connected wireless access network 11.

The core cache device 220 may be connected to the core network 12 of the first communication network 10, specifically, to a connection point between the packet core device 12a and the second communication network 20 through a switch device 12d. Accordingly, the core cache device 220 may monitor transmission/reception data of the user device 100 transmitted through the packet core device 12a, and the user device through the core network 12 and the wireless access network 11 100) can be transmitted.

A plurality of cache devices 200 including the edge cache device 210 and the core cache device 220 store some or all of one or more content provided by a content provider, and store the stored content on behalf of the content provider. It transmits to the user device 100 connected to the first communication network 10.

In addition, a plurality of cache devices 200 including the edge cache device 210 and the core cache device 220 provide an API based on a content delivery service according to the present invention. To this end, the plurality of cache devices 200 store one or more service information distributed for each cache device 200 in addition to content for a content delivery service. The one or more service information may include information classified by region and information that can be provided without distinction by region. In particular, the edge cache device 210 arranged in units of the wireless access device 11a includes service information classified by region. Is stored, and service information that can be provided without distinction by region may be stored in the core cache device 220 disposed in the core network 12 connected to all wireless access devices 11a and 11b.

For example, the service information stored in the edge cache device 210 is in the area that the edge cache device 210 is responsible for, that is, the communication coverage of the wireless access network 11 to which the edge cache device 210 is connected. It may be service information classified by corresponding region. The service information may include area identification information indicating an area corresponding to the communication coverage of the wireless access network 11, specific service information designated for a corresponding area in relation to the service provided by the service server 300, etc. have. Specifically, the service information stored in the edge cache device 210 may be, for example, weather for each region, the number of users for each region, tourism information for each region, and restaurant information for each region.

On the other hand, the service information stored in the core cache device 220 may include default information provided when the information stored in the edge cache device 210 cannot be provided to the user device 100. More specifically, the service information stored in the core cache device 220 is service information that can be provided regardless of region, and may be, for example, comprehensive weather information of the entire region.

Such service information may be distributed and stored from the service server 300 to a plurality of cache devices 200 in a preloading manner, or may be allocated and stored by a CDN service provider.

In addition, while the service information is stored as described above, the plurality of cache devices 200 monitor transmission/reception data of the user devices 100 transmitted through the first communication network 10, respectively, and transmit them from the user device 100. When the destination address information of the created data matches any one of one or more specific address information set for a content delivery service-based API, service information set in response to the specific address information is transmitted to the user device 100. The specific address information is not an IP address allocated to the cache device 200, but an IP address allocated for each content delivery service-based API, and one or more specific address information corresponds to one of the stored one or more service information, respectively. Can be set. Here, data using the specific address information as destination address information may be a request message (eg, an HTTP GET message) transmitted from the user device 100.

In addition, in the case of the first communication network 10 to which the present invention is applied, the edge cache device 210 cannot be allocated to all wireless access devices 11a and 11b. That is, there may be a wireless access device 11a to which the edge cache device 210 is connected, but there may also be a wireless access device 11b to which the edge cache device 210 is not connected. In this way, when the user device 100 requests service information through the wireless access device 11b to which the edge cache device 210 is not connected, this is the core network 12 (more specifically, the packet core device 12a). ) To provide service information through the core cache device 220.

Specifically, when the user device 100a connected to the wireless access device 11a transmits a request message using specific address information as destination address information (①), the request message is sent from the wireless access device 11a. It is transmitted to the packet core device 12a side of the core network 12, and at this time, the edge cache device 210 can receive the request message through the switch device 12b connected to the wireless access device 11a, Since the destination address information of the request message matches the specific address information, the edge cache device 210 transmits service information stored therein to the user device 100 (②). Accordingly, the user device 100 can receive service information of a region including the communication coverage of the wireless access device 11a. In this case, the request message of the user device 100 processed by the edge cache device 210 may be blocked so that the core cache device 220 cannot receive it.

On the other hand, when the user device 100b connected to the wireless access device 11b transmits a request message destined for specific address information, the edge cache device is not connected to the other wireless access device 11b. The message is transmitted to the packet core device 12a through the switch device 12c, and the packet core device 12a transmits the request message to the second communication network 20. In this case, a request message of the user device 100 transmitted from the core cache device 220 to the second communication network 20 from the packet core device 12a may be received through the switch device 12d (③). At this time, since the destination address information of the received request message matches the specific address information, the core cache device 220 transmits a message notifying that there is no service information stored by itself or service information of a corresponding region to the user device 100b. do.

Accordingly, service information divided by region may be provided to the user device 100a in the region where the edge cache device 210 is disposed, according to a request, and the user device in the region where the edge cache device 210 is not disposed ( For 100b), it is possible to provide general service information that can be provided without distinction by region upon request.

In addition, in the present invention, by allocating specific address information for each API or for each type of service information, the user device 100 can selectively receive various types of service types as necessary. For example, local weather may be provided for first specific address information, local tourist information may be provided for second specific address information, and local restaurant information may be transmitted for third specific address information. Accordingly, a service application provider can select and use desired service information as necessary, and meet the needs of various service applications.

In addition, through the cache device 200 for the content delivery service, the user device 100 can obtain different service information according to the region in which it is located, and use the obtained service information to provide other additional services. Can be provided to the user. For example, the user device 100 may receive a service based on the acquired service information from the service server 300 by transmitting service information acquired in an area where it is located to the service server 300.

In addition, in this embodiment, the case of providing an API based on address information is basically described, but the API is provided using specific flag information or tag information included in the header or payload of the request message, not the address information. can do.

That is, one or more specific flag information and specific tag information are set for each API or service information, and when each cache device 200 receives a request message, the flag information or tag information recorded in the designated location of the request message is extracted. , Compared with the set specific flag information and specific tag information, and if they match, the specific flag information and service information corresponding to the specific tag information may be provided to the user device 100.

Hereinafter, the configuration and operation of the cache device 200 will be described in more detail with reference to FIGS. 2 and 3. For reference, since the edge cache device 210 and the core cache device 220 differ only in the arrangement location and the stored service information, the basic operation is the same. Therefore, hereinafter, the edge cache device 210 and the core cache device 220 ) Will be described as the cache device 200 without distinction.

2 is a block diagram showing the configuration of the cache device 200 according to the present invention.

Referring to FIG. 2, the cache device 200 may include a storage unit 210, a communication interface unit 220, and a control unit 230.

The storage unit 210 is a component for storing data and programs required for operation of the cache device 200. Basically, the storage unit 210 stores some or all of one or more contents to be provided by the corresponding cache device 200 for a content delivery service. Here, the content stored in the storage unit 220 is distributed through a separate distribution device, or the cache device 200 mirrors and stores the content data transmitted to the user device 100. ) May be performed by various methods such as a caching method in which data of content transmitted to the user device 100 is stored according to a preset cache policy.

In addition, the storage unit 210 is one or more service information necessary to provide an arbitrary service (for example, an online game service based on user grouping, or a chat service, weather service, travel information, etc.) in the service server 300 Can save more. As described above, the one or more service information is area identification information indicating an area corresponding to the communication coverage of the wireless access network 11 to which the cache device 200 is connected, and corresponding to the service provided by the service server 300. It may include one or more of regional service information designated for a region and default service information provided without regional classification. In particular, in the case of local service information, for example, it may be local weather, local tourism information, and local restaurants. The service information may be distributed and stored from the service server 400 or may be prepared and stored by a CDN service provider.

In addition, content and service information stored in the storage unit 210 may be changed periodically or intermittently.

The communication interface unit 220 is a means for collecting data transmitted through the first communication network 10 or transmitting data. More specifically, the communication interface unit 220, the data transmitted through the first communication network 10 through the switch devices 12b, 12d of the first communication network 10, in particular, transmitted from the user device 100 The collected data and data transmitted to the user device 100 are collected. At this time, the collection of the data may be performed in various ways, such as a mirroring method in which the data transmitted through the first communication network 10 is copied as it is and a path is adjusted so that the data passes through the cache device 200. have.

The controller 230 is a component that controls the overall operation of the cache device 200, and basically, by monitoring data transmitted to the first communication network 10 through the communication interface unit 220, the user device 100 The request message is extracted, and the content requested from the extracted request message is transmitted to the user device 100. In addition, the control unit 230 according to the present invention performs an API support function based on a content delivery service.

The content delivery service-based API support function will be described with reference to the flowchart of FIG. 3.

4 is a flowchart illustrating a process of providing an API based on a content transmission service by the cache device 200 according to the present invention.

Referring to FIG. 4, the cache device 200 according to the present invention sets and stores one or more specific address information for an API based on a content delivery service (S105). The specific address information for the content delivery service-based API is allocated for each API or service information, and can be shared by all cache devices 200. That is, the specific address set for the content delivery service-based API does not mean the IP address of the cache device 200, but supports the content delivery service-based API service, not the IP address assigned to a specific device. This is the address information arbitrarily set for the purpose.

In addition, the control unit 230 of the cache device 200 monitors the transmission and reception data of the user device 100 transmitted through the first communication network 10 through the communication interface unit 220, and When the transmitted request message is received (S110), it is compared and determined whether the destination address information of the request message matches any one of the one or more specific address information set for the content delivery service-based API (S115).

And, as a result of the comparison determination, when the destination address information of the request message matches any one specific address information, the control unit 230 transmits the region-based service information stored in the storage unit 210 to the user device 100 Do (S120). In particular, service information corresponding to specific address information matching destination address information is transmitted to the user device 100.

Conversely, if the destination address information of the request message does not match the specific address information, a normal content delivery service is performed (S125). In this case, the content delivery service is provided by the cache device 200 to provide the content requested by the user device 100 on behalf of the original server, and may be performed in various ways. For example, the control unit 230 determines whether the content requested by the user device 100 is stored in the storage unit 210 through the received request message. In addition, when the requested content is stored, the controller 230 transmits the stored content to the user device 100 on behalf of the original server. Here, whether or not the requested content is being stored is determined by storing destination address information extracted from the request message, content identification information, and prefix data of the content transmitted from the original server that received the requested message. This can be achieved by comparing the content stored in the.

Next, a configuration and operation of the user device 100 that performs an additional service using the content delivery service-based API according to the present invention will be described.

4 is a block diagram showing the configuration of a user device 100 according to the present invention.

The user device 100 is an information processing device having a communication function used by the user, and may be, for example, a mobile phone, a smart phone, a desktop PC, or a tablet PC. In particular, the user device 100 according to the present invention connects to the first communication network 10 to which the cache device 200 according to the present invention is connected, and transmits and receives data through the first communication network 10.

Referring to FIG. 4, a user device 100 using a content delivery service according to the present invention includes a communication unit 110, an input unit 120, an output unit 130, a storage unit 140, and a control unit 150. ) Can be included.

The communication unit 110 is a component for connecting to the first communication network 10 and transmitting and receiving data through the first communication network 10. When the first communication network 10 is a mobile communication network, the communication unit 110 may transmit and receive data according to a mobile communication standard. That is, the communication unit 110 searches for an adjacent wireless access device 11a according to the movement of the user device 100, and performs an access procedure with the first communication network 10 through the discovered wireless access device 11a. , Data can be transmitted and received through the allocated radio resource.

The communication unit 110 transmits a request message for requesting content or service information provided through an API based on content transmission according to the control of the controller 150. The request message may be an HTTP GET message. Then, a response message, content or service information transmitted in response to the request message is received.

The input unit 120 is a component for manipulating the user device 100, and includes a key input means such as a keyboard or a keypad, a touch input means such as a touch sensor or a touch pad, a voice input means, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. It may include one or more of gesture input means including at least one of a proximity sensor, and a camera, and in addition, all types of input means that are currently being developed or that may be developed in the future may be included. In the present invention, the user may request content through the input unit 120 or request an additional service using an API based on a content delivery service. The request for the additional service may be made by selecting and requesting execution of the service application 300a implemented using the content delivery service-based API.

The output unit 130 is for outputting a user interface screen related to the operation of the user device 100, and includes LCD (Liquid Crystal Display), TFT-LCD (Thin Film Transistor LCD), OLED (Organic Light Emitting Diodes), and light emission. A diode (LED), AMOLED (Active Matrix Organic LED), a flexible display (Flexible display), 3D display (3 Dimension), it can be implemented in a variety of display devices such as a touch screen. The output unit 130 may output the received content or an execution screen of the service application 300a under the control of the controller 150.

The storage unit 140 is a component for storing programs and data related to the operation of the user device 100, and is a flash memory, a hard disk, and a multimedia card micro type memory. (Eg, SD or XD memory), RAM, ROM, etc. may be configured to include various storage media. The storage unit 140 may store an OS program executed by the controller 150 and application programs of various functions along with user data. In particular, in the present invention, the storage unit 140 stores a service application 300a implemented using an API based on a content delivery service according to the present invention.

The service application 300a is an application program implemented to perform an additional service through an API based on a content delivery service according to the present invention.

As shown in FIG. 5, the service application 300a may include a content delivery service-based API processing unit 310 and a service processing unit 320 according to the present invention.

The content delivery service-based API processing unit 310 generates and transmits a request message destined for specific address information previously set for the content delivery service-based API according to the request of the service processing unit 320, and service information accordingly It is a part that performs a function of receiving from the cache device 200 and returning it to the service processing unit 320, and the service processing unit 320 requests service information from the content delivery service-based API processing unit 310, and accordingly It is a part that performs a predetermined additional service function by using service information transmitted from the service processing unit 320.

The service application 300a configured as described above is executed according to a user's selection through the input unit 120, and provides an optional additional service based on the service information provided by the cache device 200.

For example, the service application 300a may be an online game application, a chat application, or the like.

Finally, the control unit 150 operates the user device 100 by interlocking with the components of the user device 100, that is, the communication unit 110, the input unit 120, the output unit 130, and the storage unit 140. It is a configuration to control. The control unit 150 may include a processor device that loads and executes a program stored in the storage unit 140.

For example, when the power of the user device 100 is turned on, the control unit 150 builds an execution environment of an application program by executing an OS program, and based on the execution environment, the control unit 150 uses an algorithm selected or preset by the user. Therefore, you run more than one application program.

In particular, the control unit 150 can provide an additional service using the content delivery service-based API by executing the service application 300a implemented using the content delivery service-based API according to the present invention. This will be explained with reference to 6.

6 is a flowchart illustrating a process of providing an additional service based on an API based on a content delivery service by a user device according to the present invention.

The control unit 150 executing the service application 300a implemented using the content delivery service-based API according to the present invention may operate according to the algorithm of the service application 300a as shown in FIG. 6.

That is, the control unit 150 executes the corresponding service application 300a according to a request for an additional service using an API based on a content delivery service through the input unit 120 by the user (205), and A request message (for example, an HTTP GET message) in which specific address information for is set as destination address information is generated and transmitted to the first communication network 10 connected through the communication unit 110 (S210). In this case, the controller 150 may set other specific address information according to a service type, and may set corresponding specific address information as destination address information according to a required service type. The step S210 may be performed by the service processing unit 320 of the service application 300a requesting service information from the content delivery service-based API processing unit 310 to obtain service information.

The request message transmitted from the user device 100 is upwardly transmitted to the core network 12 of the first communication network 10 through the wireless access device 11a to which the user device 100 is connected, and at this time, the switch device ( It is detected by the cache device 200 connected on the transmission path through 12b). In particular, the request message is an edge cache device 210 connected to a wireless access device 11a to which the user device 100 is connected, or a wireless access device 11b to which the user device 100 is not connected to a cache device. ), it may be detected by the core cache device 220 connected to the core network 12. In addition, service information stored in the cache device 200 may be received from the cache device 200 that has detected the request message through a response message (HTTP RESPONSE) to the request message.

When a response message to the request message transmitted as described above is received through the communication unit 110, the control unit 150 extracts service information of a corresponding region from the response message (S215).

The control unit 150 may output the extracted service information and provide it to a user, or may perform a predetermined additional service based on the service information.

To this end, the control unit 150 may transmit the extracted service information to the service server 300 (S220).

In addition, the user device 100 may interwork with the service server 300 to execute a predetermined additional service based on the service information obtained through the content delivery service-based API (S225).

For example, the service server 300 groups the user devices 100 based on the service information acquired by each user device 100, and provides a predetermined service such as a chat or a game among the grouped user devices 100. Can provide.

Of course, when the service application 300a is a stand-alone type application that independently operates only on the user device 100, the control unit 150 provides additional services based on the extracted service information without interworking with the service server 300. You can also run it.

The method of providing an API based on a content transmission service according to the present invention may be implemented in a form of software that can be read through various computer means and recorded in a computer-readable recording medium. Here, the recording medium may include a program command, a data file, a data structure, or the like alone or in combination. The program instructions recorded on the recording medium may be specially designed and configured for the present invention, or may be known and usable to those skilled in computer software. For example, the recording medium is a magnetic medium such as a hard disk, a floppy disk, and a magnetic tape, an optical medium such as a compact disk read only memory (CD-ROM), a digital video disk (DVD), and a floppy disk. Magnetic-Optical Media, such as a floptical disk, and hardware devices specially configured to store and execute program instructions such as ROM, Random Access Memory (RAM), Flash memory, etc. do. Examples of the program instructions may include not only machine language codes such as those produced by a compiler but also high-level language codes that can be executed by a computer using an interpreter or the like. These hardware devices may be configured to operate as one or more software modules to perform the operation of the present invention, and vice versa.

Here, the computer program does not necessarily correspond to files in the file system. A program may be in a single file provided to the requested program, or in multiple interactive files (e.g., files that store one or more modules, subprograms, or parts of code), or part of a file that holds other programs or data. (Eg, one or more scripts stored within a markup language document). The computer program may be deployed to run on one computer or multiple computers located at one site or distributed across a plurality of sites and interconnected by a communication network.

Although the present specification and drawings describe exemplary device configurations, the functional operations and implementations of the subject described herein are implemented with other types of digital electronic circuits, or include the functions disclosed herein and the functions. It can be implemented with computer software, firmware, or hardware, or can be implemented by a combination of one or more of them. Implementations of the subject matter described in this specification are one or more computer program products, that is, one relating to computer program instructions encoded on a tangible program storage medium for execution by or for controlling the operation of a device according to the invention. It can be implemented as the above module. The computer-readable medium may be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of materials that affect a machine-readable radio wave signal, or a combination of one or more of them.

While this specification includes details of a number of specific implementations, these should not be construed as limiting to the scope of any invention or claim, but rather as a description of features that may be peculiar to a particular embodiment of a particular invention. It must be understood. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination. Furthermore, although features operate in a particular combination and may be initially described as so claimed, one or more features from a claimed combination may in some cases be excluded from the combination, and the claimed combination may be a subcombination. Or sub-combination variations.

The present invention has an excellent effect of providing various additional services using a plurality of cache devices by supporting access to cache devices distributed in a communication network to obtain information for a content delivery service.

In particular, the present invention stores predetermined information, for example, area information, in a cache device arranged in units of a wireless access network covering different areas of a mobile network, and a specific application or a specific service accesses the cache device. Thus, by collecting the area information, it supports to provide a service based on area information.

10: first communication network
20: 2nd communication network
100: user device
200: cache device
300: service server

Claims (8)

Storing one or more service information distributed for each cache device by one or more cache devices distributed over a communication network;
Each cache device detecting a request message of a user device transmitted through a different path;
The cache device that detects the request message of the user device, the destination address information of the request message is preset one or more specific address information corresponding to one of one or more service information stored in the cache device, respectively, for an API based on a content delivery service Comparing whether it matches with; And
When the destination address information of the request message matches any one of the one or more specific address information, the cache device detecting the request message sends local service information related to the region corresponding to the matching specific address information to the user device. A method of providing an application programming interface (API) based on a content delivery service, including the step of transmitting to a content delivery service. The method of claim 1,
The service information includes at least one of area identification information related to an area mapped to a corresponding cache device, area service information related to a corresponding area, and default service information provided without area classification. Delivery method. The method of claim 1,
If the destination address information of the request message does not match the specific address information, determining whether the cache device that has detected the request message stores the content requested by the user device;
If the requested content is being stored, the method of providing an API based on a content delivery service, further comprising transmitting the content stored by the cache device detecting the request message to the user device. The method of claim 1,
The at least one cache device comprises at least one edge cache device allocated in units of a radio access network, and a core cache device disposed in a core network connecting the radio access network. The method of claim 4,
The at least one edge cache device stores service information that varies for each region, and the core cache device includes service information that can be provided regardless of region. A storage unit for storing at least one content to be provided as a content delivery service and at least one service information differently distributed for each cache device distributed in a communication network;
A communication interface unit for collecting transmission/reception data of a user device transmitted through the communication network and transmitting data to the user device; And
One or more services stored in the storage unit respectively for the content delivery service based API by monitoring the transmission/reception data of the user device collected through the communication interface unit, and when a request message from the user device is detected, the destination address information of the request message Compared with one or more specific address information set in response to one of the pieces of information, and if it matches any one of one or more specific address information, transmits local service information related to a corresponding region corresponding to the matching specific address information to the user device A cache device for providing an API based on a content delivery service, including a control unit that makes the content delivery service. The method of claim 6, wherein the control unit
When the destination address information of the request message matches the specific address information, the cache device detecting the request message blocks the transmission of the request message so that another cache device does not detect the request message. Cache device for providing API based on content delivery service. The method of claim 6, wherein the control unit
When the destination address information of the request message does not match the specific address information, it is determined whether the content requested by the user device is stored, and if so, the requested content is transmitted to the user device. Cache device for providing API based on content delivery service.

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