WO2017039022A1

WO2017039022A1 - Method for providing content through interworking with content centric networking and apparatus therefor

Info

Publication number: WO2017039022A1
Application number: PCT/KR2015/009092
Authority: WO
Inventors: 박우출; 이윤주
Original assignee: 전자부품연구원
Priority date: 2015-08-28
Filing date: 2015-08-28
Publication date: 2017-03-09
Also published as: KR102228762B1; KR20170026810A

Abstract

The present invention relates to a method for providing content and, more particularly, to a method for providing content through interworking with content centric networking and an apparatus therefor, which can provide content to a terminal through interworking with content centric networking (CCN), wherein a streaming server or a separate module apparatus capable of being linked with the streaming server converts a content segment request message into a CCN request packet, and converts a CCN response packet into a content segment response message. Accordingly, the present invention can provide a streaming service combined with content centric networking without making a special change to the design of a terminal.

Description

Content providing method through content-oriented network interworking and apparatus therefor

The present invention relates to a content providing method, and more particularly, to a content providing method and a device for interworking with a content-centric network that can provide content to a terminal through interworking with a content-centric network (CONTENT CENTRIC NETWORKING). .

The contents described in this section merely provide background information on the present embodiment and do not constitute a prior art.

Streaming refers to the transmission of content such as video or audio from a server to a client over a network such as the Internet. Data that is transmitted is treated as if it is flowing, called streaming. The server splits the video into packets that can be sent to the network, and the client gathers the packets back, restores them to their original form, and plays them. At this time, playback and packet reception occur at the same time, and the associated series of packets is called a stream.

Recently, the HTTP live streaming (HTTP Live Streaming, HLS) method is mainly used. The server supporting the HLS scheme stores contents in chunks, and the terminal of the user appropriately requests the contents according to the user's environment. For example, a server supporting the HLS scheme stores content in chunk units having a small length of 5 to 15 seconds, and provides a playlist file to the terminal. You will request the content appropriately.

However, up to now streaming services support TCP-based communication, resulting in an initial connection delay, inefficiency due to repetition of a procedure of periodically establishing and disconnecting a TCP session, and a waste of resources for maintaining session information.

Therefore, attempts have been made to apply Content Centric Networking (CCN) to streaming services to solve these problems.However, in order to apply content centric networks to streaming services, terminals can support content-centric network technologies. There is a problem that must include.

The present invention has been proposed to solve the above-described problems, and in particular, a content-oriented network capable of providing a content providing system by integrating a content-oriented network into a streaming service without a separate design change for a terminal to use the content. An object of the present invention is to provide a method for providing content and an apparatus therefor through interworking.

However, the object of the present invention is not limited to the above object, and other objects not mentioned will be clearly understood from the following description.

In accordance with an aspect of the present invention, there is provided a content providing method through interworking with a content-centric network, comprising: a CCN network including a plurality of CCN nodes capable of content-based network transmission and a connection to the CCN network. And a streaming server capable of transmitting TCP / IP-based content, the content providing system comprising: receiving, by the streaming server, a content segment request message requested by any one terminal; Converting the content segment request message into a CCN request packet and transmitting the converted content segment request message to a CCN network; Receiving a CCN response packet from the CCN network; Converting the CCN response packet into a content segment response message; And transmitting the content segment response message to the terminal.

In this case, the delivering to the CCN network may include: identifying a content name of metadata corresponding to the content; And converting the CCN request packet including the identified content name to the CCN network and transmitting the converted CCN request packet to the CCN network.

In addition, when the content name of the metadata corresponding to the content does not exist, defining the content name; may be further included.

In this case, receiving the CCN response packet may include: checking a content name for the content segment; And modifying the metadata such that the identified content name is reflected in the metadata of the content.

The content name may include at least one of name information, a content identifier, and a content segment identifier of a CCN node storing the corresponding content segment.

In addition, the present invention can provide a computer-readable recording medium recording a program for executing the content providing method through the content-centric network interworking as described above.

CCN network including a plurality of CCN nodes capable of content-based network-based content transmission according to an embodiment of the present invention for achieving the above object, and streaming that is connected to the CCN network and can transmit TCP / IP-based content In a content providing system including a server, the streaming server receives a content segment request message requested by one of the terminals, converts the content segment request message into a CCN request packet, and transmits the content segment request message to the CCN network. A conversion processing module for receiving a CCN response packet from a network, converting the CCN response packet into a content segment response message, and transmitting the converted content segment response message to the terminal; And an MPD configuration module for checking a content name of the CCN response packet transmitted from the CCN network and modifying metadata so that the content name is reflected in metadata about the content.

In this case, when converting the content segment request message to the CCN request packet, the conversion processing module checks the content name described in the metadata for the content, converts the content segment request message into a CCN request packet including the content name, and delivers the content name to the CCN network. Can be.

According to the content providing method and the apparatus therefor according to the content-oriented network interworking of the present invention, a streaming server or a separate module device interoperable with the streaming server converts the content segment request message into a CCN request packet, the content of the CCN response packet By converting into a segment response message, it is possible to provide a streaming service combined with a content-centric network without a separate design change for the terminal.

In addition, by receiving information about the CCN node that is changed in real time in the CCN network, reflecting it in metadata and distributing it to the terminal, even if the CCN node that stores the content is changed to receive and use the content segment from the CCN node more quickly It becomes possible.

In addition, various effects other than the above-described effects may be directly or implicitly disclosed in the detailed description according to the embodiment of the present invention to be described later.

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

2 is an exemplary view for explaining a process of processing a CCN request packet in a content center network according to an embodiment of the present invention.

3 is a block diagram showing the main configuration of a terminal according to an embodiment of the present invention.

4 is a block diagram showing the main configuration of a streaming server according to an embodiment of the present invention.

5 is a flowchart illustrating a content using method in a terminal according to an exemplary embodiment of the present invention.

6 is a flowchart illustrating a content providing method through interworking with a content-oriented network according to an exemplary embodiment of the present invention.

7 is a data flow diagram illustrating in more detail a content providing method through content-centric network interworking according to an embodiment of the present invention.

8 is an exemplary view for explaining the structure of metadata according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS To make the features and advantages of the present invention more clear, the present invention will be described in more detail with reference to specific embodiments shown in the accompanying drawings.

However, in the following description and the accompanying drawings, detailed descriptions of well-known functions or configurations that may obscure the subject matter of the present invention will be omitted. In addition, it should be noted that like elements are denoted by the same reference numerals as much as possible throughout the drawings.

The terms or words used in the following description and drawings should not be construed as being limited to the ordinary or dictionary meanings, and the inventors may appropriately define the concept of terms for explaining their own invention in the best way. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention. Therefore, the embodiments described in the present specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all of the technical ideas of the present invention, and various alternatives may be substituted at the time of the present application. It should be understood that there may be equivalents and variations.

In addition, terms including ordinal numbers, such as first and second, are used to describe various components, and are used only to distinguish one component from another component, and to limit the components. Not used. For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.

In addition, when a component is referred to as being "connected" or "connected" to another component, it means that it may be connected or connected logically or physically. In other words, although a component may be directly connected or connected to other components, it should be understood that other components may exist in the middle, and may be connected or connected indirectly.

In addition, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In addition, the terms "include" or "having" described herein are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more of them. It is to be understood that it does not exclude in advance the possibility of the presence or addition of other features or numbers, steps, operations, components, components or combinations thereof.

In addition, embodiments within the scope of the present invention include computer readable media having or conveying computer executable instructions or data structures stored on the computer readable medium. Such computer readable media can be any available media that can be accessed by a general purpose or special purpose computer system. By way of example, such computer readable media may be in the form of RAM, ROM, EPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage, or computer executable instructions, computer readable instructions or data structures. And may include, but are not limited to, any other medium that can be used to store or deliver certain program code means, and can be accessed by a general purpose or special purpose computer system. .

In the following description and claims, “network” is defined as one or more data links that enable the transfer of electronic data between computer systems and / or modules. When information is transmitted or provided to a computer system via a network or other (wired, wireless, or a combination of wired or wireless) communication connections, this connection can be understood as a computer-readable medium. Computer-readable instructions include, for example, instructions and data that cause a general purpose or special purpose computer system to perform a particular function or group of functions. The computer executable instructions may be, for example, binary, intermediate format instructions such as assembly language, or even source code.

In addition, the present invention relates to personal computers, laptop computers, handheld devices, multiprocessor systems, microprocessor-based or programmable consumer electronics, network PCs, minicomputers, mainframe computers, mobile phones, PDAs, pagers It may be practiced in a network computing environment having various types of computer system configurations, including (pager) and the like.

In addition, the terminal described in the specification of the present invention may be implemented in various forms. For example, mobile terminals such as smart phones, tablet PCs, personal digital assistants, portable multimedia players, and MP3 players, as well as smart TVs and desktop computers. A fixed terminal may be used, and any terminal can be used as a terminal of the present invention as long as the terminal can be used by uploading or downloading content to a content server through a network.

In addition, any content described in the specification of the present invention may be included in the content of the present invention as long as it can be expressed by a specific address (eg, a URL) on the network. For example, when the entire web site is represented by one URL, it can be distributed through the system of the present invention as one content.

The invention may also be practiced in distributed system environments where both local and remote computer systems that are linked via wired networks, wireless data links, or combinations of wired and wireless data links perform tasks. In a distributed system environment, program modules may be located in both local and remote memory storage devices.

Now, a content providing method and a device therefor through content-oriented network interworking according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, a description will be given of a content delivery system supporting a content providing method through content-oriented network interworking according to an embodiment of the present invention.

Referring to FIG. 1, a content delivery system according to an exemplary embodiment of the present invention may include a terminal 100 and a streaming server 200.

First, the terminal 100 refers to a user's device that can request, receive, and use content from the streaming server 200 according to a user's request. To this end, the terminal 100 of the present invention may be connected to the base station apparatus 310 located within a predetermined radius, and may support a process of connecting to the internet network 300 through the core network through the base station apparatus 310. In response to a user's request, content may be requested to the streaming server 200 via the Internet network 300, and then received and played. In this case, the request for the content may include an execution process of a browser, a playback application, etc. that can receive and use the content provided by the streaming server 200. Thereafter, the terminal 100 receives metadata about the content from the streaming server 200, checks the location of the storage location holding the content based on the metadata, requests the content from the storage location, and receives the content. It may include the process of doing.

In addition, the terminal 100 according to an embodiment of the present invention may request and receive the content by segment unit upon request and receive the content, and may collect and play the content by the fragment unit, which is a plurality of sets of segments. In addition, when each content segment is transmitted in an encoded state, it may support a process of decoding and playing the content segment.

The streaming server 200 is to provide various contents such as photographs, videos, audio, applications, etc. to the terminal 100, or to receive and provide contents related services. The content provider (CP; Contents) At least one content is provided from the provider and managed, and serves to provide content to the plurality of terminals 100 through the Internet network 300. In this case, the streaming server 200 of the present invention may support a process of providing content to the terminal 100 in association with the CCN adapter device 250. In other words, when the location storing the content of the present invention is distributed to a plurality of CCN nodes 410 located on the CCN network 400, the content request of the terminal 100 follows the HTTP protocol, so that the CCN network It cannot be passed to 400. Accordingly, the streaming server 200 of the present invention converts the content segment request message of the terminal into a CCN request packet in cooperation with the CCN adapter device 250 and converts the content response packet transmitted from the CCN network 400 to the content segment response message. It can support the process of converting to and transmitting to the terminal 100.

In addition, the streaming server 200 of the present invention may serve to store and manage metadata about the content. When a content name for a content segment is delivered through the CCN network 400, the metadata may be modified and distributed so that the delivered content name is reflected in the metadata of the corresponding content.

The CCN adapter device 250 serves to interwork the Internet network 300 and the CCN network 400, and may perform a function of converting a message conforming to the HTTP protocol into a CCN packet supporting the CCN protocol. . In addition, although the streaming server 200 and the CCN adapter device 250 are illustrated as independent devices in the drawings, the present invention is not limited thereto, and the CCN adapter device 250 may exist as a module in the streaming server 200. .

CCN network 400 is a type of network that can distribute and provide content in response to content-centric network-based content requests and the like, for this purpose CCN node 410 may be distributed distributed on the CCN network 400 .

Content transmission through the CCN node 410 is made through a CCN packet. The CCN packet transmits and receives contents using the name of the content as the address of the packet. The CCN packet includes a CCN request packet for requesting the content and a CCN response packet corresponding to the response packet. It is composed.

In this case, since the CCN response packet is transmitted in the reverse order of the path through which the CCN request packet is transmitted, a separate routing process is unnecessary, but the process of storing and managing routing information about which CCN node 410 is to be transmitted through need. To this end, the CCN nodes 410 should store a forwarding information base (FIB).

A method of providing content in the CCN network 400 will be described with reference to FIG. 2.

In a content-centric network, the name of a content may serve as a compass to navigate to a node where content is stored and to distinguish the content from other content. Therefore, each content uses a unique name, and if the names of the two contents are different from each other, the same content can be treated as another content. For example, if two files having the same contents exist under different names, the two files may be processed with different contents.

In FIG. 2, when one CCN node 400 receives a CCN request packet corresponding to, for example, '/ABC.com/SSS/abc.avi/v3/s3/' from face 0 101. By referring to the hierarchical name of the content of the CCN request packet, it can be checked whether the corresponding content is in its own content store 110. Here, the content store 110 may be referred to as a contents cache. As a result of the check, if the corresponding content is stored in the content store 110, the CCN node 410 returns the corresponding content to face 0 101 where the CCN request packet is received. In this case, the face may also be expressed as an interface.

If the content is not stored in the content store 110, the CCN node 410 may have the same content name (here, '/ABC.com/SSS/abc. Pending Interest Table (PIT) 130). avi / v3 / s2 ') can check whether there is an entry saved. If there is an entry stored under the same content name, the CCN node 410 may add information on the face (here, face 0 101) in which the CCN request packet enters the corresponding entry in the pending interlist table 130.

On the other hand, if there is no entry registered in the pending interlist table 130 with the same content name, the CCN node 410 performs a name lookup based on the content name in the forwarding information base (FIB) 150. You can do this to find the entry. In this case, the CCN node 410 may perform a search according to the longest prefix matching.

The CCN node 410 determines a face (for example, face 1 105) to deliver a CCN request packet based on information registered in the forwarding information base (FIB) 150, and determines the face (face 1 ( 105)) may transmit a CCN request packet. In this process, the CCN node 410 may register the information '0' on the face (face 0 101) to which the CCN request packet is delivered to the interlist table (PIT) 130. This is for routing the CCN response packet to the node that requested the content when delivering the CCN response packet, which is a content response packet including the content corresponding to the CCN request packet, to the terminal 100 in the future. Here, when selecting (determining) a face to which the CCN request packet is delivered based on the forwarding information base 150, the face where the CCN request packet is received (here, face 0 101) may be excluded from the selection target.

Referring back to FIG. 1, the plurality of CCN nodes 410 determines another CCN node 410 to which the CCN request packet is to be delivered by referring to the FIB as described above, and uses the PIT to route the CCN response packet. The CCN response packet may be delivered to the terminal 100 without a process.

Through this process, the CCN response packet may be delivered to the CCN adapter device 250, and the CCN adapter device 250 may support a process of converting the CCN response packet into a content segment response message and then transmitting the same to the terminal 100. Can be.

In addition, when one CCN node 410 stores a content segment changed from a storage location of the corresponding content segment or an origin server, information for defining a content name thereof is transmitted to the streaming server 200. In addition, the streaming server 200 may perform a process of adding or modifying metadata after defining a content name.

The internet network 300 of the present invention may be connected through an access network (not shown) and a core network (not shown) connected through a plurality of base station devices 310. An access network (not shown) is an access network that performs wired or wireless communication with the terminal 100. For example, a plurality of base stations such as a base station (BS), a base transceiver station (BTS), a NodeB, an eNodeB, and a base station (BSC) It may be implemented as a base station controller such as a controller, a radio network controller (RNC).

As another method, a digital signal processor and a wireless signal processor, which are integrally implemented in the base station, are divided into digital units (hereinafter referred to as DUs and radio units (hereinafter referred to as RUs)). Each of the plurality of RUs (not shown) may be installed in the region of the plurality, and the plurality of RUs (not shown) may be configured by connecting with a centralized DU (not shown).

In addition, the core network (not shown) constituting the network together with the access network (not shown) serves to connect the access network (not shown) and the external network, for example, the Internet network 300.

As described above, the core network (not shown) is a network system that performs a main function for mobile communication services such as mobility control and switching between access networks (not shown), and includes circuit switching or packet switching. switching, and manages and controls the packet flow in the mobile network. In addition, the core network (not shown) may manage inter-frequency mobility, and may play a role for interworking with traffic in the access network (not shown) and the core network (not shown) and other networks such as the Internet network 310. have. In addition to the above-described configuration, the core network may further include a mobile switching center (MSC), a home location register (HLR), a mobile mobility entity (MME), a home subscriber server (HSS), and the like.

In addition, the Internet network 310 refers to a conventional public communication network, that is, a public network, through which information is exchanged according to the TCP / IP protocol, and is connected to the streaming server 200 and provided from the streaming server 200. The core network (not shown) and the wired or wireless connection network (not shown), and may be provided to the terminal 100, and may transmit a request of the terminal 100 to the streaming server 200.

As described above, the content providing system of the present invention has been briefly described. The content providing system includes a cloud computing network that stores computing resources such as hardware and software, and provides computing resources required by a client to a corresponding terminal. can do. Here, cloud computing refers to a computer environment in which information is permanently stored on a server on the Internet and temporarily stored in client terminals such as desktops, tablet computers, laptops, netbooks, and smartphones. It refers to a computer environment access network that stores a server on the Internet and makes this information available anytime, anywhere through various IT devices. Such an Internet network 300 is a closed network such as a local area network (LAN), a wide area network (WAN), an open network such as the Internet, as well as a code division multiple access (CDMA) and a wideband code (WCDMA). This concept includes both Division Multiple Access (GSM), Global System for Mobile Communications (GSM), Long Term Evolution (LTE), and Evolved Packet Core (EPC), as well as next-generation and cloud computing networks. .

In addition, a processor mounted in each device according to an embodiment of the present invention may process a program command for executing a method according to the present invention. In one implementation, this processor may be a single-threaded processor, and in another implementation, the processor may be a multithreaded processor. Furthermore, the processor is capable of processing instructions stored on memory or storage devices.

Hereinafter, the configuration and operation method of the terminal 100 according to an embodiment of the present invention will be described with reference to FIG. 3.

1 and 3, the terminal 100 according to an embodiment of the present invention includes a communication unit 110, an input unit 120, a control unit 130, an output unit 140, and a storage unit 150. Can be configured.

Referring to each component in more detail, first, the communication unit 110 performs a role of transmitting and receiving information with the streaming server 200 through the Internet network (300). To this end, the communication unit 110 of the present invention may perform a procedure for accessing the Internet network 300. The base station apparatus 310 is located within a predetermined radius, and the access request of the found base station apparatus 310 is performed. Thus, by supporting the process of being connected to the base station apparatus 310, it can be connected to an access network (not shown). Here, the process of connecting the communication unit 110 of the terminal 100 to the base station apparatus 310 of the access network (not shown) may adopt a variety of well-known configuration, a detailed description thereof will be omitted. In addition, the communication unit 110 may transmit user information when performing a communication procedure with the base station apparatus 310. Basically, a terminal identification number such as an IMSI (International Mobile Subscriber Identity) or the like may be transmitted to the base station apparatus 310, and the terminal identification number while the base station apparatus 310 performs a connection procedure with a core network (not shown). Etc., subscriber information can be confirmed.

In addition, when the communication unit 110 according to an embodiment of the present invention normally connects to the core network (not shown) through the base station apparatus 310 of the access network (not shown), it is possible to request and receive content.

The input unit 120 transmits a variety of information such as numeric and text information input from a user, a signal input in connection with various function settings and function control of the terminal 100, to the controller 130. In particular, the input unit 120 of the present invention may support a user input necessary for accessing the streaming server 200.

As described above, the input unit 120 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, an acceleration sensor and a proximity sensor, and a camera. It may also include a gesture input means comprising at least one or more.

In addition, it may include all types of input means that are currently under development or may be developed in the future.

The controller 130 performs overall control of the terminal 100, and includes at least one processor including a central processing unit (CPU) and an execution memory (eg, a register and at least one memory loading data) loaded in hardware. And / or a random access memory (RAM) and a bus that inputs and outputs at least one data into the processor and memory. In addition, it may include a predetermined program routine (Routine) or program data that is loaded into the execution memory from a predetermined recording medium to be performed by the processor to perform a function defined in the terminal 100 by software. . In other words, among the functions provided in the terminal 100 for the content receiving and playing process according to an embodiment of the present invention, a component that can be processed in software may be determined as the function of the controller 130.

As such, the controller 130 of the present invention is functionally connected to at least one component provided for content transmission and playback processing according to an embodiment of the present invention. That is, the controller 130 is functionally connected to the communication unit 110, the input unit 120, the storage unit 140, and the output unit 150, and controls the flow of signals for supplying power and performing functions to the components. Control.

In particular, the controller 130 according to an embodiment of the present invention may include a content reproduction processing module 131.

The content reproduction processing module 131 controls overall contents related to content request, reception, and reproduction. For example, the content reproduction processing module 131 may execute a reproduction application. Here, the playback application performs a function of playing back the content provided by the streaming server 200. For example, it may be an application capable of playing high quality content provided by the streaming server 200. However, the present invention is not limited thereto, and any application (for example, a browser) may be a playback application of the present invention as long as the streaming server 200 can play content provided by the streaming server 200.

The content reproduction processing module 131 checks the MPD information, which is metadata. Through the MPD, the content reproduction processing module 131 of the present invention may check address information (URL) for each segment, and may request and receive a content segment from the corresponding streaming server 200. In this case, the content reproduction processing module 131 of the present invention may check the identification information of each segment, and if the identification information is the same, request and receive a substream at the same time, and perform a process of processing the reproduction.

In addition, the controller 130 of the present invention may further include a decoding module (not shown), and decodes the segment transmitted from the content reproduction processing module 131 and outputs the result of the content reproduction processing module 131. ) To play the content.

The storage 140 may temporarily store various data generated during execution of the application program, including an application program required for operating a function according to an embodiment of the present invention. In particular, the storage 140 according to an embodiment of the present invention may store and manage information related to the playback application 151 that can execute the content provided by the streaming server 200, and store the received content segment. Can be managed.

The storage 140 may largely include a program area and a data area. The program area stores related information for driving the terminal 100 such as an operating system (OS) for booting the terminal 100. The data area is an area in which data generated according to the use of the terminal 100 is stored, and as described above, the content segment delivered from the playback application and the internet network 300 may be stored. The storage unit 140 may include a flash memory, a hard disk, a multimedia card micro type memory (eg, SD or XD memory, etc.), a RAM, a ROM, and the like. ROM) and a storage medium.

The output unit 150 displays information on a series of operation states and operation results that occur during the functioning of the terminal 100. In particular, the output unit 150 of the present invention may display various information related to the execution of the playback application.

As described above, the output unit 150 may be implemented in the form of a single touch panel (or touch screen) together with the input unit 120, and when implemented together with the input unit 120, a user's touch operation. Various information generated according to the present invention can be displayed.

In addition, the output unit 150 of the present invention as described above is a liquid crystal display (LCD), thin film transistor LCD (TFT-LCD), organic light emitting diodes (OLED), light emitting diodes (LED), AMOLED (Active Matrix) Organic LED), a flexible display (Flexible display) and a three-dimensional display (3 Dimension) and the like. Some of these displays may also be configured to be transparent or light transmissive so that they can be seen from the outside. It may be configured in the form of a transparent display including a transparent OLED (TOLED).

As such, the main components of the terminal 100 have been described with reference to FIG. 3. However, not all components illustrated in FIG. 3 are essential components, and the terminal 100 may be implemented by more components than the illustrated components, and the terminal 100 may be implemented by fewer components. It may be implemented. For example, the terminal 100 may further include a sound source output unit (not shown) for converting a sound source, which is an electrical signal, into an analog signal and outputting the analog signal.

In addition, the position of the main components of the terminal 100 shown in FIG. 3 may be changed for convenience or other reasons.

In addition, the specific operation of the terminal 100 according to an embodiment of the present invention will be more clearly understood through the flowchart described below.

Hereinafter, the main configuration and operation method of the streaming server 200 according to an embodiment of the present invention.

First, referring to FIGS. 1 and 4, the streaming server 200 according to an embodiment of the present invention may include a server communication unit 210, a server control unit 220, and a server storage unit 230.

In more detail with respect to each component, the server communication unit 210 serves to transmit and receive the necessary information with the terminal 100 through the communication network (300).

The server controller 220 includes an MPD configuration module 221, a conversion processing module 222, and a service support module 223.

Here, the 'module' is a component that performs a predetermined function, respectively, can be implemented in hardware, software, or a combination of hardware and software. For example, the 'module' may mean a program module, which is executed by a processor to perform a predetermined function, software components, object-oriented software components, class components and Components such as task components, processes, functions, properties, procedures, subroutines, segments of program code, drivers, data, databases, data structures, tables, arrays , And variables. In addition, the functionality provided in the components and 'modules' may be combined into a smaller number of components and '~ modules' or further separated into additional components and '~ modules'.

First, the MPD configuration module 221 generates and manages metadata about content. In addition, the metadata may be modified and the process of distribution to the terminal 100 may be controlled.

The conversion processing module 222 is for explaining an embodiment in which the function of the CCN adapter device 250 illustrated in FIG. 1 is modularized and included in the server controller 220. The request processing according to the HTTP protocol of the terminal 100 is performed. The process of converting the request to the CCN protocol and converting the response to the CCN protocol into the response according to the HTTP protocol can be controlled.

The conversion processing module 222 of the present invention may be omitted when implemented as a separate CCN adapter device 250 as shown in FIG.

The service support module 223 may control the overall process for transmitting content to the terminal 100 at the request of the terminal 100. For example, if content is transmitted to registered users, membership authentication may be performed. In addition, it plays a role of transmitting metadata to the terminal 100 and may support a process of smoothly delivering the content segment to the terminal 100.

In addition, when performing the encoding process, the server controller 220 of the present invention may further include an encoding module.

The server storage unit 230 stores information related to performance of the streaming server 200 of the present invention, and in particular, may store and manage the MPD information 231.

In addition, although not shown in the drawing, when the streaming server 200 of the present invention provides a service to a registered user, personal information for membership registration and authentication may be stored and managed. In addition, when storing and managing a content segment in a storage location in the streaming server 2000 of the present invention, it may include a corresponding substream.

The specific operation of the streaming server 200 according to an embodiment of the present invention will be more clearly understood through the flow chart described below.

Hereinafter, a content providing method through content-oriented network interworking according to an embodiment of the present invention will be described.

1 and 5, the terminal 100 of the present invention first executes a playback application to use the content provided by the streaming server 200 (S101).

Here, the playback application performs a function of playing back the content provided by the streaming server 200. For example, it may be an application capable of playing high quality content provided by the streaming server 200. However, the present invention is not limited thereto, and any application (for example, a browser) may be a playback application of the present invention as long as the streaming server 200 can play content provided by the streaming server 200.

In addition, the playback application of the present invention is preferably downloaded in advance from the streaming server 200 or a separate content store is installed in the terminal 100, but is not limited thereto, and may execute the playback application in a cloud manner. .

Thereafter, the terminal 100 of the present invention checks the MPD information, which is metadata (S203). Through the MPD, the terminal 100 may check address information (URL) for each content segment (S105), and transmit a content segment request message (HTTP REQUEST) to a device corresponding to the address information (S107). ).

In this case, the content segment request message may be transmitted using the streaming server 200 as a destination address, and thereafter, a content segment response message (HTTP RESPONSE) is received from the streaming server 200 (S109), so that the content segment can be reproduced. (S111). In this case, the terminal 100 of the present invention may process a process of decoding the content segment response message when it is encoded.

Hereinafter, a content providing method through content-oriented network interworking in a streaming server according to an exemplary embodiment of the present invention will be described.

Before describing with reference to FIG. 6, it is assumed that the streaming server 200 of the present invention includes the functions of the CCN adapter device 250 for convenience of description, but is not limited thereto. The corresponding step may be implemented in the CCN adapter device 250.

1 and 6, the streaming server 200 of the present invention receives a content segment request message from the terminal 100 (S201). The streaming server 200 of the present invention converts the received content segment request message into a CCN request packet to transmit to the CCN network 400 (S203).

In this case, the streaming server 200 of the present invention first checks whether it owns a content segment corresponding to the content segment request message, and if so, the terminal sends a content segment response message including the content segment to the terminal. The process of transmitting to 100 may be performed.

In addition, when the streaming server 200 of the present invention does not store the corresponding content segment, the streaming server 200 converts it into a CCN packet, which is a CCN packet, so that the CCN network 400 can process it. To this end, the streaming server 200 of the present invention checks the metadata of the content, checks the content name corresponding to the corresponding content segment, and generates a CCN request packet including the content name. Here, the content name may include name information of a storage location storing the corresponding content segment, a content identifier, and a content segment identifier.

When the CCN request packet is delivered to the CCN network 400 (S205), a plurality of CCN nodes located in the CCN network 400 may perform a routing process. That is, after checking whether the content segment corresponding to the content name is being stored and transmitting the content segment to the streaming server 200, the content segment corresponding to the content name is transmitted to the streaming server 200. If not, the content segment corresponding to the content name is the origin server. The CCN request packet can be delivered to the storage location of the provider). The CCN nodes that have received the CCN response packet from the content provider deliver this to the streaming server 200.

When the streaming server 200 receives the CCN response packet, which is a response packet for the CCN request packet, from the CCN network 400 (S207), the streaming server 200 converts the content segment response (HTTP RESPONSE) message to the terminal 100 for transmission. In operation S209, the content segment response message may be transmitted to the terminal 100 in operation S211.

In addition, the streaming server 200 of the present invention can check the information on the CCN nodes holding the content segment in step S207 through the content name of the CCN response packet, the content name of the content metadata Can be stored in In addition, the changed metadata may be transmitted to the terminal 100 to support a faster content provision.

Content providing method through the content-centric network interworking according to an embodiment of the present invention may be achieved through the interworking between the streaming server 200 and the CCN adapter device 250. That is, in FIG. 6, the function of the CCN adapter device 250 operates in a form included in the streaming server 200, but the function of the CCN adapter device 250 of the present invention may operate independently.

This will be described with reference to FIG. 7.

Referring to FIG. 7, first, the terminal 100 executes a playback application to use contents provided by the streaming server 200 (S301).

Thereafter, the terminal 100 of the present invention checks the MPD information, which is metadata (S303). The terminal 100 of the present invention through the MPD can check the address information (URL) for each content segment (S305), the content segment request message (HTTP REQUEST) to the streaming server 200 corresponding to the address information It transmits (S307).

The streaming server 200 receiving this is transmitted to the CCN adapter device 250 (S309). The CCN adapter device 250 of the present invention serves to connect the Internet network 300 and the CCN network 400, and is a device capable of converting and processing a message conforming to the HTTP protocol into a packet form conforming to the CCN protocol. .

The CCN adapter device 250 of the present invention first checks the CCN content name in order to convert the content segment request message transmitted from the streaming server 200 into a CCN request packet (S311). The name information may be achieved by checking metadata of the content.

The CCN adapter device 250 converts the CCN request packet to the CCN request packet including the checked content name (S313) and delivers the same to the CCN network 400. A plurality of CCN nodes constituting the CCN network 400 performs a routing process by finding the CCN nodes storing the content segment corresponding to the content name (S317). If a corresponding content segment exists in one CCN node or the content segment exists in a content provider (S319), a CCN response packet may be transmitted to the CCN adapter device 250 through a routing process again. On the other hand, the CCN response packet transmitted from the CCN network 400 may be delivered with the content itself including the content segment instead of the content segment. In this case, the CCN adapter device 250 divides the content into segments. Therefore, only the corresponding content segment requested by the terminal 100 may be controlled to be delivered to the terminal 100.

In addition, the CCN adapter device 250 of the present invention converts the CCN response packet transmitted from the CCN network 400 to the content segment response message (S323), and transmits the converted content segment response message to the streaming server 200. It is made (S325). In addition, the CCN response packet includes a content name including information on the storage location of the content segment, the streaming server 200 of the present invention metadata to reflect the content name to be transmitted to the metadata for the content The process of modifying will be performed.

The distributed metadata may be distributed to the terminal 100 to support content provision according to the changed metadata later.

In addition, when the content segment response message is transmitted from the streaming server 200 (S327), the terminal 100 of the present invention may receive the content segment and play back the content (S329).

The streaming server 200 of the present invention performs the process of modifying the metadata so that the content name transmitted from the CCN adapter device 250 is reflected in the metadata for the content. Do it.

Referring to FIG. 8, metadata of the present invention means media presentation description (MPD) of content. Here, MPD means a stylized description of a media presentation, and the MPD of the present invention may be MPD of Dynamic and Adaptive HTTP Streaming of MEPG of MPEG.

As described above, the MPD may include a description of a representation 705 (or a representation) of media to be delivered to the terminal 100. That is, the MPD describes combinations of video, audio, and language that the terminal 100 can access.

The MPD may define a format 707 for informing resource identifiers for a segment. The MPD may provide a context for the identified resources in the media presentation, where the resource identifiers are HTTP-URLs and may be limited by the byte range attribute.

Each period is divided into fragments, where fragments may be used in the same sense. Segment is a term for Generation Partnership Project (3GPP) adaptive HTTP streaming.

The fragment (segment, 707) responds to an HTTP / 1.1 GET request for an HTTP-URL (or a GET request for a portion indicated by a byte range), as defined in RFC 2616, for example. Sub-segment means the smallest unit in the segments that can be indexed by the segment index at the segment level. can do.

In addition, one period 703 may include two or more fragment sets, and each of the sets of fragments may be referred to as a representation. In addition, the representation may be referred to as an alternative.

Representation is a structured collection of one or more media components within one period. Representation is an alternative to media content or a subset of media content, with different encoding choices, such as bitrate, resolution, language, codec, and the like. alternative) may be one of the choices. That is, the representation may represent a combination of video, audio, language, and the like that may constitute media.

The MPD (or MPD element) provides descriptive information that enables the terminal 100 to select one or more representations, in other words suitable for accessing segments and providing streaming services to the user. (appropriate) A document containing metadata required by the DASH client to construct HTTP-URLs. HTTP-URLs can be absolute or relative. Such an MPD may be implemented in the form of an XML-document, and the MPD may include various MPD elements as described above, but may include only one MPD element.

When the metadata generation is completed, the streaming server 200 of the present invention may transmit the metadata to the corresponding terminal 100. In this case, the streaming server 200 of the present invention may perform a process of modifying the content name transmitted from the CCN adapter device 250 to be reflected in the metadata. That is, as indicated by 709 and 711, the content name can be specified in each metadata. As indicated by 711, the content segment identification information and the content identification information as defined by the 709 are defined as the content name. It can be described in.

In addition, the streaming server 200 according to an embodiment of the present invention distributes the modified metadata to the terminal 100 and when the content segment transmission request is transmitted from the terminal 100 which has been checked later, the content name of the metadata. By checking the information, it is possible to support a process of transmitting the corresponding content segment to the terminal 100 at the CCN node immediately without the routing process in the CCN network 400.

In addition, the streaming server 200 according to an embodiment of the present invention may generate a plurality of metadata corresponding to any one content. For example, when the streaming server 200 of the present invention supports a scalable encoding method of generating a bitstream by layering content into a plurality of layers, decoding is selectively performed according to the performance or network state of the terminal 100. Information about this can be described in metadata.

In the above, the content providing method through the content-oriented network interworking according to an embodiment of the present invention has been described.

Content providing method through the content-centric network interworking of the present invention includes a CCN network including a plurality of CCN nodes capable of content-based network-based content transmission, and a streaming server connected to the CCN network and capable of transmitting TCP / IP-based content In the content providing system, the streaming server, receiving a content segment request message requested by any one terminal, converting the content segment request message to a CCN request packet and forwarding to the CCN network, from the CCN network Receiving a CCN response packet, converting the CCN response packet into a content segment response message, and transmitting the content segment response message to the terminal.

Such computer-readable media suitable for storing computer program instructions and data include, for example, recording media comprising magnetic media, such as hard disks, floppy disks, and magnetic tape, and compact disk read only memory (CD-ROM). , Optical media such as Digital Video Disk (DVD), magneto-optical media such as Floppy Disk, and ROM (Read Only Memory), RAM And a semiconductor memory such as a random access memory, a flash memory, an erasable programmable ROM (EPROM), and an electrically erasable programmable ROM (EEPROM). The processor and memory can be supplemented by or integrated with special purpose logic circuitry.

The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. In addition, a functional program for implementing the present invention, codes and code segments associated therewith may be used in consideration of a system environment of a computer that reads a recording medium and executes the program. It may be easily inferred or changed by.

In addition, the computer program recorded on the computer-readable recording medium as described above includes instructions for performing the functions as described above, distributed and distributed through the recording medium to be read and installed on a specific device, a specific computer, and executed. Thus, the above functions can be executed.

Here, in order for a computer to read a program recorded on a recording medium and execute functions implemented as a program, the above-described computer program is a C, C ++ that can be read by the computer's processor (CPU) through the computer's device interface (Interface) Code for a program instruction coded in a computer language such as JAVA, machine language, or the like may be included.

Such code may include a function code associated with a function or the like that defines the above-described functions, and may include execution procedure-related control code necessary for a processor of the computer to execute the above-described functions according to a predetermined procedure. In addition, the code may further include memory reference-related code for additional information or media required for a processor of the computer to execute the above-described functions at which location (address address) of the computer's internal or external memory. . In addition, if the processor of the computer needs to communicate with any other computer or server on the remote in order to execute the above functions, the code may be used to determine which computer the processor of the computer uses the communication module of the computer on the remote. It may further include communication-related codes such as how to communicate with other computers or servers, and what information or media should be transmitted and received during communication.

Although the specification includes numerous specific implementation details, these should not be construed as limiting to any invention or the scope of the claims, but rather as a description of features that may be specific to a particular embodiment of a particular invention. It must be understood. Certain features that are described in this specification in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable subcombination. Furthermore, while the features may operate in a particular combination and may be initially depicted as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, the claimed combination being a subcombination Or a combination of subcombinations.

Likewise, although the operations are depicted in the drawings in a specific order, it should not be understood that such operations must be performed in the specific order or sequential order shown in order to obtain desirable results or that all illustrated operations must be performed. In certain cases, multitasking and parallel processing may be advantageous. Moreover, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products. It should be understood that it can.

According to the present invention, a separate module device capable of interworking with a streaming server or a streaming server converts a content segment request message into a CCN request packet and converts a CCN response packet into a content segment response message, thereby designing a separate terminal for the terminal. It is possible to provide streaming services combined with content-oriented networks without change, thereby contributing to the development of the service industry.

In addition, the present invention has industrial applicability because the present invention is not only sufficiently commercially available or commercially viable, but also practically clearly implemented.

Claims

A content providing system including a CCN network including a plurality of CCN nodes capable of content-based network-based content transmission, and a streaming server connected to the CCN network and capable of transmitting TCP / IP-based content.

The streaming server,

Receiving a content segment request message requested by any one terminal;

Converting the content segment request message into a CCN request packet and transmitting the converted content segment request message to a CCN network;

Receiving a CCN response packet from the CCN network;

Converting the CCN response packet into a content segment response message; And

Transmitting the content segment response message to the terminal;

Content providing method through the content-centric network interworking, comprising a.
The method of claim 1,

Delivering to the CCN network

Checking a content name of metadata corresponding to the content; And

Converting the CCN request packet including the identified content name to a CCN network;

Content providing method through the content-centric network interworking, comprising a.
The method of claim 2,

If a content name of metadata corresponding to the content does not exist, defining the content name;

Content providing method through the content-centric network interworking further comprising a.
The method of claim 1,

Receiving the CCN response packet

Identifying a content name for the content segment; And

Modifying the metadata such that the identified content name is reflected in the metadata of the content;

Content providing method through the content-centric network interworking further comprising a.
The method of claim 4, wherein

The content name is

And at least one of name information, a content identifier, and a content segment identifier of the CCN node storing the corresponding content segment.
A computer-readable recording medium having recorded thereon a program for executing the content providing method through the content-oriented network interworking according to any one of claims 1 to 6.
A content providing system including a CCN network including a plurality of CCN nodes capable of content-based network-based content transmission, and a streaming server connected to the CCN network and capable of transmitting TCP / IP-based content.

The streaming server,

Receives a content segment request message requested by one of the terminals, converts the content segment request message into a CCN request packet and delivers the CCN network to the CCN network, receives a CCN response packet from the CCN network, and sends the CCN response packet to the content. A conversion processing module converting the segment response message and transmitting the converted segment response message; And

An MPD configuration module for identifying a content name of the CCN response packet transmitted from the CCN network and modifying metadata so that the content name is reflected in metadata about the content;

Streaming server comprising a.
The method of claim 7, wherein

The conversion processing module, after converting the content segment request message into the CCN request packet, checks the content name described in the metadata for the content, converts the content segment request message into a CCN request packet including the content name, and transmits the converted content to the CCN network. A streaming server characterized by the above.