KR20160129816A - System and method for providing contents delivery network service through wireless networks - Google Patents

Abstract

The present invention relates to a method and a system for a CDN service with a wireless network. According to the present invention, the method for a CDN service includes: a step in a service providing device transmits service content through a CDN; a step in which a local wireless content providing device receives and stores the content through the CDN; a step in which the service providing device receives a request for the provision of the service content from a user terminal; a step in which the service providing device provides connection information of the local wireless content providing device to the user terminal requesting the content; and a step in which the local wireless content providing device transmits pre-stored content in an Wi-Fi mode in accordance with a request of the user terminal.

Description

TECHNICAL FIELD [0001] The present invention relates to a system and a method for providing a service through a wireless network,

The present invention relates to a method and system for providing a CDN via a wireless network, and more particularly, to a method and system for providing a CDN service through a wireless network in a network environment such as a bus or a subway, To a CDN service method and system via a wireless network.

The provider of the content stores a plurality of contents such as a moving picture, a music file, and video data to be provided to the client terminal in the contents providing server. However, it is practically difficult for a content server to provide a part or all of a plurality of contents one-to-one to each of a plurality of client terminals. This is because, in the case of a content server, a plurality of client terminals requesting content exist in a plurality of ISPs while a single ISP (Internet Service Provider) is connected thereto.

Accordingly, the traffic between the ISPs increases exponentially as the content provider and the client terminal increase, and the transmission delay or the transmission failure rate due to traffic congestion increases. Also, in the worst case, a content server malfunction (fail-over) occurs.

To overcome this problem, CDN (Content Delivery Network) is introduced. The CDN includes a large amount of content such as video data, moving picture data, audio data, and content frequently requested by the client terminals among contents stored in a content server remote from the client terminal to a plurality of ISP interconnection points (PoP, Point of Presence) in a distributed cache server. When there is a request for contents stored in the cache server from the client terminal, the server returns the path of the cache server that is closest to the user, and the client terminal accesses the cache server through the returned path and receives the contents Service.

However, the existing CDN is intended for delivering contents in a wired network, and it is difficult to apply it to a mobile environment such as a bus or a subway.

Korean Patent Laid-Open No. 10-2003-0088730 (November 20, 2003): Apparatus and method for providing public wireless LAN service in subway using wireless repeater

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for efficiently managing data traffic generated by using a large- capacity multimedia service in a mobile environment such as a bus and a subway, JP-A-2000-005918, and JP-A-2005-19959.

According to an aspect of the present invention, there is provided a CDN service system via a wireless network, comprising: a service providing apparatus for providing service contents through a CDN; And a local wireless content providing device for receiving and storing the content through the CD and transmitting the pre-stored content according to a request of the user terminal located in the local area by WiFi.

Here, the service providing apparatus may include a content distribution server for distributing the content to the local wireless content providing apparatus; And selecting a local wireless content providing device capable of providing the fastest content to the user terminal based on the location of the user terminal and the current traffic amount, and transmitting the request to the selected local wireless content providing device And global load balancing (GLB) for controlling traffic to be delivered.

The service providing apparatus may further include: a content distribution server for distributing the content to the local wireless content providing apparatus; And a task allocator for checking the IP of the user terminal requesting the content and providing the IP of the local wireless content providing apparatus close to the user terminal to the user terminal.

The service providing apparatus may further include: a content distribution server for distributing the content to the local wireless content providing apparatus; And checking the IP of the local wireless content providing apparatus storing the content corresponding to the domain according to the domain name requested by the user terminal, checking the IP of the user terminal requesting the content, And a DNS server for providing IP.

According to an aspect of the present invention, there is provided a local wireless content providing apparatus including: a Wi-Fi access point receiving content via a CD player and transmitting the content to a Wi-Fi channel; A content storage unit for storing content received from the access point; And a wireless CD-ROM local server having a web server unit for transmitting the contents.

Here, the Wi-Fi access point can receive the content through a wireless CD.

The content providing apparatus may further include a content synchronization manager for managing content that needs to be synchronized with the service providing apparatus in providing the content.

According to another aspect of the present invention, there is provided a method of providing a CDN via a wireless network, the method comprising: transmitting a service content through a CDN; Receiving and storing the content through a CD player of a local wireless content providing apparatus; Receiving the service content providing request from the user terminal; Providing the service providing apparatus with access information of the local wireless content providing apparatus to a user terminal requesting the content; And transmitting the pre-stored content by the local wireless content providing apparatus in a Wi-Fi manner at the request of the user terminal.

The step of providing the access information of the local wireless content providing apparatus to the user terminal requesting the content by the service providing apparatus may include the steps of: Selecting a local wireless content providing apparatus capable of providing content; And controlling the traffic to be transmitted to the selected local wireless content providing apparatus so that the request of the user terminal is transmitted.

The providing of the connection information of the local wireless content providing apparatus to the user terminal requesting the content may include receiving an IP of the user terminal requesting the content, And providing the IP of the device to the user terminal.

The providing of the connection information of the local wireless content providing apparatus to the user terminal requesting the content may include providing the local wireless content providing service corresponding to the domain according to the domain name requested by the user terminal Checking the IP of the device, and confirming the IP of the user terminal requesting the content, and providing the IP of the local wireless content providing device to the user terminal.

The method of controlling a local wireless content providing apparatus according to an exemplary embodiment of the present invention includes the steps of receiving and storing content via a wireless CD, .

As described above, the CDN service method and system through the wireless network of the present invention can reduce the network load by efficiently managing data traffic generated by using the large capacity multimedia service in a mobile environment such as a bus and a subway .

1 is a control block diagram of a CDN service system via a wireless network according to a first embodiment of the present invention;
2 is a control block diagram of the local wireless content providing apparatus of FIG. 1,
3 is a control block diagram of a CDN service system via a wireless network according to a second embodiment of the present invention,
4 is a control block diagram of a CDN service system via a wireless network according to a third embodiment of the present invention,
FIG. 5 is a flowchart illustrating a method of providing a CDN via a wireless network according to a first embodiment of the present invention;
6 is a flowchart illustrating a method of providing a CDN using a wireless network according to a second embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a control block diagram of a CDN (Content Delivery Network) service system over a wireless network according to a first embodiment of the present invention.

The CDN service system via the wireless network according to the first embodiment comprises a service providing apparatus 100 for providing a content service through a mobile CDN, a server 300 for receiving and storing contents from the service providing apparatus 100, And a local wireless content providing apparatus 200 for providing the content according to a request of the local wireless content providing apparatus 200.

The service providing apparatus 100 includes a content distributor 110, a delivery server 112, a global load balancing (GLB) 114, and a content storage unit 116.

The content distribution server 110 distributes content for providing a service to the user terminal 300.

The transmission server 112 transmits the requested content to the user terminal 300.

The GLB 114 selects a server capable of providing the best service to the user terminal 300 among the plurality of servers arranged on the CDN and connects the service to the next higher server Bypass connection to resolve the obstacle. That is, the GLB 114 controls the traffic so that the user's service request is delivered to a server that is closer and faster. Accordingly, the GLB 114 can perform functions such as task allocator 118 for server connection setting and traffic control such as DNS function.

The content storage unit 116 stores contents for providing a service.

The local wireless content providing apparatus 200 is installed in a fixed place or a mobile environment such as a bus or a subway to receive and store contents provided by the service providing apparatus 100 and to transmit the stored contents to the user terminal 300 .

2 is a control block diagram of the local wireless content providing apparatus 200 of FIG.

The local wireless content providing apparatus 200 includes a Wi-Fi access point 210 and a wireless CDN local server 220.

The WiFi access point 220 is installed in a fixed location, a mobile environment such as a bus or a subway, and provides a wireless communication service to the user terminal 300. The WiFi access point 220 is connected to the service providing apparatus 100 through a wired / wireless Internet and is connected to the user terminal 300 through a Wi-Fi channel to provide a wireless communication service to the user terminal 300.

The wireless CDN local server 220 is connected to the Wi-Fi access point 220. The wireless CDN local server 220 includes a web server unit 222, a content synchronization manager 224, a download / streaming unit 226, an application unit 228, a first content storage unit 230, Lt; / RTI >

The web server unit 222 generates and transmits a web page according to the Internet address requested by the user.

The contents synchronization manager 224 manages contents that need to be synchronized from the service providing apparatus 100.

The download / streaming unit 226 transmits the content to the user terminal 300 in a downloading method or a streaming method.

Application portion 228 manages applications used in Wi-Fi access point 220, such as location-based services.

The content received from the service providing apparatus 100 is stored in the first content storage unit 230 and the second content storage unit 232. The first content storage unit 230 and the second content storage unit 232 may be separately managed according to the characteristics of the content or managed in one storage unit. For example, various configurations may be possible, such as separately managing contents larger than the reference capacity and small contents, or separately managing contents for a specific service.

In accordance with this configuration, the local wireless content providing apparatus 200 according to the first embodiment is provided with content storage units 230 and 232, Software can be installed to provide a service for a device in a specific Wi-Fi access point 220 using content stored in a local transmission server.

3 is a control block diagram of a CDN service system via a wireless network according to a second embodiment of the present invention. In the following description of the second embodiment, the same functions and functions as those of the first embodiment are described. The same names and reference numerals as those in the embodiment are given, and a duplicate description thereof will be omitted.

According to the second embodiment, the service providing apparatus 100 includes a content storage unit 250, a content distribution server, and a task allocator 118. The task assigner 118 of the service providing apparatus 100 allocates a connection of the wireless CDN local server 220. [

The wireless CDN local server 220 connected with the service providing apparatus 100 and the mobile CDN includes a content synchronization manager 224, a local transmission server, and a content storage unit 250.

The contents synchronization manager 224 manages contents that need to be synchronized from the service providing apparatus 100.

The local transmission server transmits the content stored in the content storage unit 250 to the user terminal 300.

The wireless CDN local server 220 according to the second embodiment constructs a web server having a separate storage space in the Wi-Fi access point to locally process the traffic connecting to the Wi-Fi access. The downloaded content and hit contents are stored in a separate storage space. When a content providing request is received by the Wi-Fi access point, the web server directly provides the contents. That is, a web server and a local transmission server in the form of a cache storage may be implemented in the Wi-Fi access point 220 to process a service requested by the Wi-Fi access point 220.

FIG. 4 is a control block diagram of a CDN service system over a wireless network according to a third embodiment of the present invention. In the third embodiment, the same functions and functions as those of the first and second embodiments The same names and reference numerals as those of the first and second embodiments are given, and a duplicate description thereof will be omitted.

The CDN service system via the wireless network according to the third embodiment includes an external DNS server, a service providing apparatus 100, a wireless CDN local server 220, and a user terminal 300.

The external DNS server 400 transmits the user terminal 300 to the service providing apparatus 100 when the user terminal 300 requests the URL to request the IP address of the local transmission server.

The service providing apparatus 100 includes a content storage unit 250, a content distribution server, and an internal DNS server 120. The internal DNS server 120 determines the IP of the local transmission server 112 by referring to the IP of the user terminal 300 and transmits the IP to the user terminal 300.

The wireless CDN local server 220 includes a content synchronization manager 224, a local transmission server and a content storage unit 250.

The user terminal 300 accesses the wireless CDN local server 220 using the IP provided by the service providing apparatus 100 and receives the contents.

According to the third embodiment, the contents of the service providers are stored in the wireless CDN local server 220, and the DNS server confirms the user terminal 300 to inform the nearest local transmission server.

As described above, according to the present invention, the contents of the service providing apparatus 100 are transmitted from the local server using the wireless CDN local server 220, thereby distributing traffic generated in the service providing apparatus 100 and the CDN can do.

5 is a flowchart illustrating a method of providing a CD-R via a wireless network according to a first embodiment of the present invention.

The service providing apparatus 100 distributes the download target content and the main hit content to the wireless CDN local server 220 through the wireless CDN network (S210). The service providing apparatus 100 may provide the content to the wireless CDN local server 220 using a CDN that is advantageous for transmitting large amount of data such as Wibro, backhaul, P2P multicast, etc., The server 220 stores the received content in the content storage unit 250.

The user terminal 300 transmits a URL for service use to the service providing apparatus 100 to request an IP capable of receiving the content (S212). The user terminal 300 requests the contents to the task allocator 118, which is a URL specified in the page for service use. For example, content can be requested at the address "http://hoppin.cdn.com/asdf.mp4&quot ;.

Accordingly, the task allocator 118 of the service providing apparatus 100 determines the IP address of the user terminal 300 and performs redirect to the nearest local transmission server (S214).

Accordingly, the user terminal 300 accesses the local transmission server informed by the task allocator 118 to download the content through the local Wi-Fi network (S216).

6 is a flowchart illustrating a method of providing a CDN using a wireless network according to a second embodiment of the present invention.

The service providing apparatus 100 distributes the download target content and the main hit content to the wireless CDN local server 220 via the wireless CDN network (S310). The service providing apparatus 100 may provide the content to the wireless CDN local server 220 using a CDN that is advantageous for transmitting large amount of data such as Wibro, backhaul, P2P multicast, etc., The server 220 stores the received content in the content storage unit 250.

The user terminal 300 transmits a URL for use of the service to the external DNS server 400 and requests an IP to receive the content (S312). The user terminal 300 requests the contents to the task allocator 118, which is a URL specified in the page for service use. For example, content can be requested at the address "http://hoppin.cdn.com/asdf.mp4&quot ;.

The internal DNS server 120 transmits the IP request of the user terminal 300 to the external DNS server 400 (S314).

The service providing apparatus 100 determines the IP address of the local transmission server by determining the IP address of the user terminal 300 and transmits the IP to the user terminal 300 (S316).

Accordingly, the user terminal 300 accesses the local transmission server through the received IP and downloads the content through the local Wi-Fi network (S318).

As described above, the present invention proposes a configuration in which a local wireless content providing apparatus and a content storage unit for storing large-capacity content are mounted on a mobile Wi-Fi access point in a mobile environment such as a bus and a subway. Accordingly, the moving user terminal can wirelessly receive the large-capacity content stored in the content storage unit through the local wireless content providing apparatus.

With this configuration, the network load can be reduced by distributing traffic to the local wireless content providing apparatus as compared with the existing centralized structure. In addition, data traffic caused by using multimedia service is reduced and the load of the wireless network is reduced.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

The present invention relates to a method and system for providing a CD-ROM service through a wireless network, which can reduce the network load by efficiently managing data traffic generated by using a large-capacity multimedia service in a mobile environment such as a bus and a subway .

100: service providing apparatus 110: content distribution server
112: Transport server 114: GLB (Global Load Balancing)
116: Content storage unit 118: Task allocator
120: Internal DNS server
200: Local wireless content providing device
210: Wi-Fi access point
220: Wireless CDN local server
222: Web server unit 224: Content synchronization manager
226: download / streaming section 228: application section
230: first content storage unit 232: second content storage unit
240: local transmission server 250: content storage unit
300: user terminal 400: external DNS server

Claims (3)

A Wi-Fi access point receiving content via a CD and transmitting the content to a Wi-Fi channel;
A content storage unit for storing content received from the access point; And
And a wireless CD-ROM local server having a web server unit for transmitting the contents,
The wireless CD-ROM local server
A web server unit for generating and transmitting a web page according to an Internet address requested by a user;
A content synchronization manager for managing content requiring synchronization from the service providing apparatus 100;
A download / streaming unit for transmitting contents to the user terminal 300 in a downloading method or a silver-streaming method;
An application unit for managing applications used in the Wi-Fi access point 220, such as location-based services;
A first content storage unit (230) for storing content received from the service providing apparatus; and a second content storage unit (232).
The method according to claim 1,
Wherein the WiFi access point receives the content via a wireless CD. The method according to claim 1,
Further comprising a contents synchronization manager for managing contents that need to be synchronized with the service providing apparatus in providing the contents.

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