WO2015160222A1 - 실시간 방송 컨텐츠 전송 방법 및 이를 위한 장치 - Google Patents
실시간 방송 컨텐츠 전송 방법 및 이를 위한 장치 Download PDFInfo
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- WO2015160222A1 WO2015160222A1 PCT/KR2015/003886 KR2015003886W WO2015160222A1 WO 2015160222 A1 WO2015160222 A1 WO 2015160222A1 KR 2015003886 W KR2015003886 W KR 2015003886W WO 2015160222 A1 WO2015160222 A1 WO 2015160222A1
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- content
- streaming
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- providing server
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
Definitions
- the present invention relates to a contents delivery network (CDN) for transmitting broadcast content in real time, and more particularly, by caching content broadcasted in real time to a terminal device and providing the content to a third terminal device.
- CDN contents delivery network
- the present invention relates to a method and apparatus for transmitting real-time broadcast content capable of reducing the traffic of a network and a load of a content providing server.
- a plurality of local caching devices are installed at the network edge of the ISP, and the content provided by the content provider CP is replaced in advance in the local caching device.
- the content delivery network (CDN) provided according to the emergence.
- the content delivery network selects and connects local caching devices that can provide the best service for the user's request. It is made of a local caching device that stores in advance and pushes or caches the stored content according to a user request.
- the local caching device distributes and receives the content received through one stream from the content provider CP to a plurality of terminal devices due to the limitation of providing the content in real time. You can only take advantage of splitting, not the same pushing and caching as you would with on-demand streaming.
- the present invention proposes a real-time broadcast content transmission method and apparatus therefor that can allow caching together with splitting for a local caching device in providing a content delivery service.
- the present invention by the content delivery control device for branching the streaming content that is already received, and delayed the branched streaming content delivered to the local caching device, the local caching device to enable the real-time broadcast to cache the content transmitted in real time
- a method for transmitting content and an apparatus therefor are provided.
- An apparatus for controlling content delivery includes a communication unit, a storage unit, and a control unit.
- the communication unit transmits and receives data with a local caching apparatus and a content providing server distributed and distributed in a network.
- the storage unit stores the streaming list including information on one or more streaming contents received from the content providing server.
- the controller receives a request for streaming content transmitted from the terminal device to the content providing server through the communication unit, the controller determines whether the requested streaming content is registered in the streaming list, and the requested streaming content in the streaming list. If is registered, the streaming content received from the content providing server branched and delayed by a predetermined time and then transmitted to the terminal device.
- the local caching apparatus includes a communication unit, a storage unit, and a control unit.
- the communication unit of the local caching apparatus transmits and receives data through a network, and the storage unit stores streaming content.
- the controller of the local caching apparatus receives streaming content transmitted to the terminal device through a content transmission control device, and stores the same streaming content as the received streaming content. Determine whether the content is stored in the unit, and if the same streaming content is stored, transmit a caching hit notification to the content transmission control device, and then store the stored streaming content according to the chunk identifier provided from the content transmission control device. Send to the terminal device.
- the content transmission control device receiving a request for streaming content transmitted from the terminal device to the content providing server via a network; Determining, by the content transmission control apparatus, whether the requested streaming content is registered in a streaming list that is information about one or more streaming content received from the content providing server; As a result of the determination, when the requested streaming content is registered in the streaming list, the content transmission control device branches and delays the corresponding streaming content received from the content providing server to transmit to the terminal device through the network. A first transmission step; And when the requested streaming content is not registered in the streaming list, the content transmission control device transmits the request to the content providing server, and receives the streaming content transmitted from the content providing server. And a second transmitting step of transmitting to the terminal device through the network.
- the present invention allows caching in transmitting broadcast content in real time, thereby reducing network traffic load and traffic concentration on a content provider due to redundant transmission of content.
- the content delivery control device delays the streaming of the received streaming content to the local caching device so that the local caching device caches the streaming content using prefix caching and transmits the cached streaming content. Allow.
- FIG. 1 is a diagram illustrating the overall configuration of a content delivery system according to an embodiment of the present invention.
- FIG. 2 is a block diagram illustrating a configuration of an apparatus for controlling content delivery according to an embodiment of the present invention.
- FIG. 3 is a block diagram illustrating a configuration of a local caching apparatus according to an embodiment of the present invention.
- 4A and 4B are flowcharts illustrating a process of transmitting streaming content according to an embodiment of the present invention.
- FIG. 5 is a flowchart illustrating a method of providing streaming content in the apparatus for controlling content delivery according to an embodiment of the present invention.
- FIG. 6 is a flowchart illustrating a method of providing other streaming content in the apparatus for controlling content delivery according to an embodiment of the present invention.
- FIG. 7 is a flowchart illustrating a process of stopping providing streaming content in the apparatus for controlling content delivery according to an embodiment of the present invention.
- FIG. 8 is a flowchart illustrating a method of providing streaming content in a local caching apparatus according to an exemplary embodiment.
- a content delivery system In contrast to on-demand streaming, a content delivery system according to an embodiment of the present invention is required to broadcast content in real time without delay (Live streaming), for example, Internet protocol television.
- Live streaming for example, Internet protocol television.
- IPTV Internet Protocol TeleVision, IPTV
- streaming content referred to in the description below means live streaming content that should be broadcast in real time
- streaming means live streaming.
- FIG. 1 is a diagram illustrating the overall configuration of a content delivery system 100 according to an embodiment of the present invention.
- the configuration of the content delivery system 100 illustrated in FIG. 1 illustrates functionally divided functional elements, and any one or more components may be integrated with each other in an actual physical environment.
- the content delivery system 100 may include a plurality of terminal devices 110, one or more local caching devices 120, a content delivery control device 130, and a content providing server ( 140 and the network 150.
- the terminal device 110 is a configuration for requesting the streaming content to the content providing server 140 via the network 150, and receives and outputs the requested streaming content.
- the terminal device 110 may be described by being divided into the first terminal device 110a to the n-th terminal device 110n for convenience of description.
- the terminal device 110 may transmit and receive data through the network 150, and any device capable of processing and outputting streaming content may be allowed.
- the terminal device 110 may include a smart phone, a tablet, a laptop, a portable multimedia player, a tablet, a personal digital assistant. , E-Book Reader, etc. may be included, but is not limited thereto.
- the local caching apparatus 120 is configured to cache streaming content transmitted through the network 150 by being distributed and distributed in the network 150, and to transmit the cached streaming content to the terminal device 110.
- the local caching apparatus 120 monitors data transmitted between the terminal apparatus 110 and the content providing server 140 via the network 150, and then outputs content from the terminal apparatus 100 through the network 150.
- a request for streaming content transmitted to the providing server 140 and a streaming content transmitted to the terminal device 100 from the content providing server 140 are received.
- the local caching device 120 receives streaming content transmitted to the terminal device 110 through the content transmission control device 130 and receives the received content. It is determined whether streaming content identical to the streaming content is stored in the storage.
- the local caching apparatus 120 transmits a caching hit notification to the content transmission control apparatus 130 and then is provided from the content transmission control apparatus 130. According to the chunk identifier, the stored streaming content is transmitted to the terminal device.
- the content transmission control device 130 is connected to the network 150, to control the data flow flowing into the network 150 from another network (not shown), one or more local distributed in the network 150 It is a configuration for caching and transmitting streaming content through the caching apparatus 120.
- the content transmission control device 130 stores a list of streaming content, that is, a streaming list, received from the content providing server 140 and transmitted to the terminal device 110 through the network 150.
- the content transmission control device 130 determines whether the requested streaming content is registered in the streaming list.
- the streaming content received from the content providing server 140 is branched and delayed by a predetermined time, and then the corresponding terminal device 110 through the network 150.
- the delay value may be set according to a time required for determining the caching hit in the local caching apparatus 120.
- the content providing server 140 is a server device of a content provider CP to provide content to the terminal device 110 through the network 150.
- content provided by the content providing server 140 may be broadcast in real time.
- the network 150 is an infrastructure for providing the streaming content to the terminal device 110 by the content providing server 140, and includes code division multiple access (CDMA) and wide band code division.
- Mobile networks such as Wideband CDMA, WCDMA, High Speed Packet Access (HSPA), Long Term Evolution (LTE), Ethernet, x Digital Subscriber Line (xDSL) ), Wired communication networks such as Hybrid Fiber Coax (HFC), Fiber To The Home (FTTH), Wi-Fi, Wibro, Wima, Ultra-wideband (Ultra) Wireless communication network such as WideBand (UWB) or the like or a combination of the above-described communication network, but may be formed, but is not limited to a specific communication network.
- the network 150 according to an embodiment of the present invention connects one or more access networks 152 and one or more access networks 152 connected to the plurality of terminal devices 110, and the content transmission control device 130. It may be made including a core network 151 to be connected.
- the core network 151 connects a plurality of access networks 152 and performs a function of call processing, mobility control, switching, and the like, and includes a packet core device (Evolved Packet Core, EPC, 151a) and It may be configured to include a plurality of switching device (151b).
- EPC Packet Core
- the packet core device (EPC) 151a is a configuration that manages and controls the flow of packets and is in charge of connection with other networks (not shown), and the plurality of switching devices 151b are packets for each of the plurality of access networks 152. This is the configuration responsible for the delivery.
- the access network 152 is a subscriber network capable of transmitting and receiving data with the terminal device 110 by wire or wirelessly.
- the access network 152 according to an embodiment of the present invention consists of a plurality of digital units (DUs) and radio units (Radio Units, RUs) centralized on each digital unit (DU), It may be implemented as a base station 152a capable of separating and processing radio signals.
- the network 150 distributedly arranges a plurality of local caching devices 120 at edges of the network 150 and connects the access network through the switching device 151b connected thereto.
- Streaming content may be provided to each terminal device 110 connected to 152.
- the request for the streaming content transmitted from the terminal device 110 is transmitted to the content providing server 140 through any one of the local caching device 120 and the content transmission control device 130, and conversely, content provision
- the streaming content transmitted from the server 140 is delivered to the terminal device 110 through the content transmission control device 130 and any one local caching device 120.
- the local caching apparatus 120 may receive data transmitted between the terminal device 110 and the content providing server 150 through a mirroring technique or a path change of a switch / router.
- the mirroring technique refers to a technique of copying and bringing a mobile packet as it is through the network 100 without affecting traffic.
- the content transmission control device 130 is connected between the packet core device 151a of the core network 151 and the external network, the request for the streaming content transmitted to the content providing server 140 and the content providing server ( 140 may receive the streaming content transmitted.
- FIG. 2 is a block diagram illustrating a configuration of the content transmission control device 130 according to an embodiment of the present invention.
- the configuration of the content delivery control device 130 illustrated in FIG. 2 illustrates functionally divided functional elements, and any one or more components may be physically separated or integrated.
- the content transmission control device 130 may include a communication unit 131, a storage unit 132, and a control unit 133.
- the components of the communication unit 131 are components for transmitting and receiving data with the content providing server 140 and the local caching apparatus 120. More specifically, the communication unit 131 monitors the network 150 and receives the streaming content and the request for the streaming content transmitted between the terminal device 110 and the content providing server 140 and delivers the request to the control unit 133. do. In addition, the communication unit 131 may transmit streaming content to the local caching apparatus 120 through the network 150, and transmit a request for streaming content to the content providing server 140 through another network (not shown). Can be.
- the other network (not shown) may be a separate public network or a dedicated network different from the network 150, but is not limited thereto.
- the storage unit 132 is a component for storing information and programs necessary for providing a content delivery service according to an exemplary embodiment.
- the storage unit 132 may store the streaming list 132a and the subscriber information 132b.
- the streaming list 132a is information on one or more streaming contents currently received from the content providing server 140
- the subscriber information 132b is information on one or more terminal devices 110 receiving each streaming content.
- the streaming list 132a and the subscriber information 132b are mapped to the streaming content received from the content providing server 130 and the terminal device 110 receiving the corresponding streaming content in a table form. Can be managed.
- the controller 133 is a component that performs overall control of the content transmission control apparatus 130 and is a component for controlling a signal flow for performing the functions of the communication unit 131 and the storage unit 132. In general, the controller 133 determines whether the streaming content is being received using the streaming list 132a in response to the request for the streaming content from the terminal device 110. In addition, the controller 133 branches the previously received streaming content for prefix caching of the local caching device 120, and delays the branched streaming content to deliver it to the local caching device 120.
- control unit 133 monitors the network 150 through the communication unit 131 to receive a request for streaming content transmitted from the terminal device 110 to the content providing server 140 or by using a local caching device ( 120, a request for streaming content.
- the controller 133 determines whether the requested streaming content is registered in the streaming list 132a in order to determine whether the requested streaming content is already received.
- the requested streaming content is registered in the streaming list 132a, the requested streaming content is the streaming content that has already been requested from the terminal device 110, and the content transmission control device 130 displays the previously received streaming content.
- the other terminal device 110 may be transmitted.
- the controller 133 branches the requested streaming content that is already received from the content providing server 140, and branches the branched streaming content for a predetermined time.
- the preset time may be set according to a time required for a caching hit for determining whether the same content is cached in the local caching apparatus 120.
- the time is required for the terminal device 110 to reproduce the divided chunk of the requested streaming content. It may depend on the time it takes.
- the preset time according to an embodiment of the present invention may be set to 5 seconds as a reproduction time of one divided chunk for streaming content.
- the controller 133 registers the terminal device 110 that requested the streaming content in the subscriber information 132b.
- the controller 133 transmits the streaming content whose streaming is delayed through the communication unit 131 to the local caching apparatus 120 that has requested the streaming content.
- the controller 133 determines whether a caching hit notification for streaming content is received from the local caching apparatus 120 through the communication unit 131.
- the control unit 133 stops the delivery of the delayed streaming content to the local caching device 120, but instead receives the delayed streaming content until the stop request for the streaming content is received from the local caching device 120.
- the chunk identifier (Signature) for identifying the divided chunk for the transmission is transmitted to the local caching apparatus 120 through the communication unit 133.
- the requested streaming content is streaming content that is not requested from any terminal device 110, and the content transmission control device 130 may use the terminal device ( In order to provide the streaming content to the 110, it is necessary to receive the streaming content newly from the content providing server 140.
- the controller 133 transmits a request for streaming content to the content providing server 140 through the communication unit 131.
- the controller 133 monitors the network 150 through the communication unit 131 and receives streaming content transmitted from the content providing server 140 to the terminal device 110.
- the controller 133 registers the streaming content received from the content providing server 140 in the streaming list 132a and registers the terminal device 110 that requested the streaming content in the subscriber information 132b.
- the controller 133 delivers the streaming content received through the communication unit 131 to the local caching device 120 that has requested the streaming content until the stop request for the streaming content is received from the local caching device 120. .
- the controller 133 monitors the network 150 by the communication unit 131 and receives a stop request for streaming content transmitted from the terminal device 110 to the content providing server 140.
- the controller 133 stops the transmission of the streaming content or the chunk identifier that is being transmitted to the local caching apparatus 120.
- the controller 133 deletes the terminal device 110 requesting the suspension registered in the subscriber information 132b.
- the controller 133 determines whether the number of the terminal devices 110 that receives the streaming content requested for the suspension registered in the subscriber information 132b is zero.
- the controller 133 may request streaming content that is requested to be stopped from the content providing server 140. Stop receiving for In addition, the controller 133 deletes the streaming content that is requested to be interrupted registered in the streaming list 132a.
- FIG. 3 is a block diagram illustrating a configuration of a local caching apparatus 120 according to an embodiment of the present invention.
- the configuration of the local caching apparatus 120 illustrated in FIG. 3 illustrates functionally divided functional elements, and any one or more components may be physically separated or integrated.
- the local caching apparatus 120 may include a communication unit 121, a storage unit 122, and a control unit 123.
- each communication component 121 is a configuration for transmitting and receiving data to and from the content delivery control device 130 and the terminal device 110. More specifically, the communication unit 121 monitors the network 150, receives a request for streaming content and streaming content transmitted between the terminal device 110 and the content providing server 140, and delivers the request to the control unit 123. do. In addition, the communication unit 121 may transmit a request for streaming content to the content transmission control device 130 through the network 150, and transmit the streaming content to the terminal device 110.
- the storage unit 122 is a component for storing information and programs necessary for providing a content delivery service according to an exemplary embodiment.
- the storage unit 122 may store the streaming list 122a, the subscriber list 122b, the chunk 122c, and the chunk identifier 122d.
- the streaming list 122a is information on at least one streaming content received from the content transmission control device 130
- the subscriber information 122b is information on at least one terminal device 110 receiving the streaming content.
- the chunks 122c are divided data for the streaming content received from the content transmission control apparatus 130
- the chunk identifiers 122d are identifiers for identifying the chunks.
- the streaming list 122a and the subscriber information 122b are mapped to the streaming content received from the content transmission control device 130 and the terminal device 110 receiving the respective streaming content to be managed in a table form. Can be.
- the chunk 122c and the chunk identifier 122d are mapped with the divided chunk 122c for the streaming content received from the content delivery control device 130 and the chunk identifier 122d for identifying each corresponding chunk. It can be managed in the form of one table.
- the controller 123 is configured to perform overall control of the local caching apparatus 120, and is configured to control a signal flow for performing the functions of the communicator 121 and the storage 122.
- the controller 123 receives and stores streaming content from the content providing server 140.
- the controller 123 delivers the streaming content to the terminal device 110 using the stored streaming content.
- the controller 123 monitors the network 150 through the communication unit 121 and receives a request for streaming content transmitted from the terminal device 110 to the content providing server 140.
- the controller 123 transmits the received request for the streaming content to the content transmission control device 130 through the communication unit 121.
- the controller 123 receives streaming content from the content transmission control device 130 through the communication unit 121 in response to the transmitted request.
- the controller 123 determines whether the chunk corresponding to the received streaming content and the chunk corresponding to the received streaming content are stored in the storage unit 122 to determine whether the prefix caching for the streaming content is hit.
- the chunk is divided data about streaming content received from the content transmission control device 130.
- the controller 123 may determine that the requested streaming content is the same when a predetermined constant number of divided chunks of the received streaming content is continuously hit.
- the local caching apparatus 120 may determine that the requested streaming content is the same when three divided chunks of the streaming content are successively hit.
- the streaming content is a streaming content that is already received from the content transmission control device 130, and the local caching device ( 120 may transmit previously received streaming content to another terminal device 110. Therefore, when the chunk corresponding to the received streaming content and the corresponding chunk are stored in the storage unit 122, the controller 123 determines that the prefix caching for the requested streaming content is hit, and the communication unit 121. Transmits a caching hit notification for the streaming content to the content transmission control device 130 through.
- the control unit 123 receives the chunk identifier from the content transmission control device 130 through the communication unit 121 instead of stopping the reception of the streaming content from the content transmission control device 130 through the communication unit 121.
- the controller 123 transmits the streaming content through the communication unit 121 using the received chunk identifier.
- the controller 123 may transmit the streaming content to the terminal device 110 until receiving a stop request for the streaming content from the terminal device 110.
- the streaming content is the streaming content that is not requested from any terminal device 110, and the local caching device ( In order to provide the streaming content to the terminal device 110, the 120 will newly receive the streaming content from the content transmission control device 130. Accordingly, when the chunk corresponding to the received streaming content and the corresponding chunk are not stored in the storage unit 122, the controller 123 determines that the prefix caching for the requested streaming content is missed and is being received.
- the streaming content is stored for a preset time based on the current time of the streaming content.
- the preset time may be a time required for the constant constant number of the divided chunks of the received streaming content to be played through the terminal device 110, but is not limited thereto.
- the storage retention time here may be recognized as the user of the terminal device 110 receives the streaming content in real time when the local caching device 120 prefixes the stored streaming content and delivers it to the terminal device 110.
- the time may not be as long as this time, but the time is not limited thereto and may be long enough to be close to a limit supported by the physical environment of the local caching apparatus 120.
- the controller 123 transmits the streaming content received from the content transmission control device 130 through the communication unit 121 to the terminal device 110 until it receives a stop request for streaming content from the terminal device 110. To pass.
- FIGS. 4A and 4B are flowcharts illustrating a transmission flow of streaming content according to an embodiment of the present invention.
- the plurality of terminal devices 110 are divided into the first terminal device 110a to the third terminal device 110c, and the plurality of local caching devices 120 are first local caching.
- the device 120a and the second local caching device 120b will be described separately.
- the first terminal device 110a to the third terminal device 110c request the same streaming content A. Furthermore, the first terminal device 110a and the second terminal device 110b are connected to the first local caching device 120a by a global server load balancing (GSLB), and the third terminal device 110c Assume that it is connected to the second local caching apparatus 120b.
- GSLB global server load balancing
- the request for the streaming content A of the first terminal device 110a and the second terminal device 110b passes through the first local caching device 120a and the content transmission control device 130 to provide the content providing server 140.
- the request for streaming content A of the third terminal device 110c is transmitted to the content providing server 140 via the second local caching device 120b and the content delivery control device 130.
- the first and second local caching apparatuses 120a and b and the content delivery control apparatus 130 may intercept and receive a request transmitted to the content providing server 140 through the network 150.
- the first terminal device 110a transmits a request for streaming content A to the content providing server 140 through the network 150, and the first local caching device 120a transmits the network 150. ) And receives a request for streaming content A transmitted by the first terminal device 110a (S401).
- the first local caching apparatus 120a transmits a request for streaming content A received through step S401 to the content transmission control apparatus 130 (S403).
- the content transmission control apparatus 130 monitors the network 150.
- the content transmission control device 130 determines that the streaming content A is not being received, and the content providing server 140
- the request for streaming content A is forwarded (S407).
- the content providing server 140 transmits the streaming content to the first terminal device 110a in response to step S407, and the content delivery control device 130 monitors the network 150 to transmit the content providing server 140.
- One streaming content is received (S409).
- the content transmission control device 130 registers the streaming content A received through the streaming list 132a through step S409, and registers the first terminal device 110a that requested the streaming content A through the step S401 on the subscriber information 132b. Register (S411).
- the content delivery control device 130 transmits the streaming content A received through step S409 to the first local caching device 120a (S413).
- the first local caching apparatus 120a determines whether the chunk corresponding to the divided chunk for the streaming content A received through the step S413 is stored and determines whether the prefix caching for the streaming content A is hit (S415). . As a result of the determination in step S415, since the chunk corresponding to the divided chunk for the streaming content A is not stored, the first local caching apparatus 120a determines that the prefix caching is missed, and the received streaming content is received in step S413. Based on the current time of A, the streaming content A is stored for a predetermined time (S417). In operation S417, it is assumed that the first local caching apparatus 120a stores the streaming content A of three divided chunks for the received streaming content A. In operation S413, the first local caching apparatus 120a transmits the received streaming content A to the first terminal apparatus 110a.
- the first terminal device 110a requests the streaming content A through step S401 and receives it through step S419, the time required from the request for the streaming content A to the reception will be T1.
- the second terminal device 110b transmits a request for streaming content A to the content providing server 140 through the network 150, and the first local caching device 120a transmits the network 150. ) And receives the request for streaming content A transmitted by the second terminal device 110b (S421).
- the first local caching apparatus 120a transmits a request for streaming content A received through step S421 to the content transmission control apparatus 130 (S423).
- the content transmission control apparatus 130 may monitor the network 150 or determine whether the streaming content A received through step S423 is already being received, the streaming content A requested through the step S423 in the streaming list 132a. It is determined whether is registered (S425). As a result of the determination in step S425, since the streaming content A is registered in the streaming list 132a through step S411, the content transmission control device 130 determines that the streaming content A is already received, and the subscriber information 132b indicates S421. In operation S427, the second terminal device 110b that has requested the streaming content A is registered.
- the content transmission control device 130 branches the received streaming content A, delays the branched streaming content A by a predetermined time, and transmits the delayed streaming content A to the first local caching device 120a. Transfer (S429). In operation S429, it is assumed that the content transmission control device 130 delays the divided chunk for the branched streaming content A by the time required for the second terminal device 110b to play back.
- the first local caching apparatus 120a determines whether a chunk corresponding to the divided chunk for the streaming content A received through the operation S429 is stored, and determines whether to hit the prefix caching for the streaming content A (S431). .
- the first local caching apparatus 120a determines that the streaming content A is the same when three divided chunks of the streaming content A received through operation S429 are hit.
- step S431 since the three chunks corresponding to the streaming content A and the three chunks corresponding to the content are stored through the step S417, the first local caching apparatus 120a determines that the prefix caching has been hit, and the content The caching hit notification for the streaming content A is transmitted to the transmission control device 130 (S433).
- the content transmission control device 130 Since the content transmission control device 130 receives the caching hit notification for the streaming content A through step S433, instead of stopping delivery of the delayed streaming content A that is being delivered through step S429, the content transmission control device 130 is divided into the delayed streaming content A.
- the chunk identifier for identifying the chunk is transmitted to the first local caching apparatus 120a (S435).
- the first local caching apparatus 120a transmits the streaming content A stored in step S417 to the second terminal device 110b by using the chunk identifier received in step S435 (S437).
- the second terminal device 110b requests the streaming content A through step S421 and receives it through step S437, the time required from the request for the streaming content A to the reception will be T2.
- the streaming content A being transmitted to the first terminal device 110a is also transmitted to the second terminal device, the traffic between the content transmission control device 130 and the content providing server 140 is reduced, and the prefix is transmitted in step S431.
- traffic between the first local caching device 120a and the content delivery control device 130 will be reduced. Therefore, overall T2 will have a shorter time than T1.
- the third terminal device 110c transmits a request for streaming content A to the content providing server 140 through the network 150, and the second local caching device 120b monitors the network 150 to display a third message.
- the terminal device 110c receives a request for streaming content A.
- the second local caching apparatus 120b transmits the request for the streaming content A received through the step S441 to the content transmission control apparatus 130 (S441).
- the content transmission control apparatus 130 may monitor the network 150 or determine whether the streaming content A received through step S431 is already being received, the streaming content A requested through the step S441 to the streaming list 132a. It is determined whether is registered (S443). As a result of the determination in step S443, since the streaming content A is registered in the streaming list 132a through step S411, the content transmission control device 130 determines that the streaming content A is already received, and the subscriber information 132b indicates S439. In operation S445, the third terminal device 110c that has requested the streaming content A is registered. In operation S409, the content transmission control device 130 branches the received streaming content A, delays the branched streaming content A by a predetermined time, and transmits the delayed streaming content A to the second local caching device 120b. Transfer (S447). In operation S447, it is assumed that the content transmission control device 130 delays the divided chunk for the branched streaming content A by the time required for the third terminal device 110c to play back.
- the second local caching apparatus 120b determines whether the chunk corresponding to the divided chunk for the streaming content A received through the step S447 is stored, and determines whether the prefix caching for the streaming content A is hit (S449). . As a result of the determination in step S449, since the chunk corresponding to the divided chunk for the streaming content A is not stored, the second local caching apparatus 120b determines that the prefix caching is missed, and the streaming content being received through the step S4. Based on the current time of A, the streaming content A is stored for a predetermined time (S451). In operation S415, it is assumed that the second local caching apparatus 120b stores the streaming content A of three divided chunks for the received streaming content A. In operation S453, the second local caching apparatus 120b transmits the streaming content A being received to the third terminal apparatus 110c.
- the third terminal device 110c requests the streaming content A through step S439 and receives it through step S453, the time required from the request for the streaming content A to the reception will be T3.
- the streaming content A being transmitted to the first terminal device 110a is also transmitted to the third terminal device, the traffic between the content transmission control device 130 and the content providing server 140 is reduced, but the prefix in step S449.
- traffic between the second local caching device 120b and the content delivery control device 130 will not be reduced.
- T3 will have a shorter time than T1, but a longer time than T2.
- FIG. 5 is a flowchart illustrating a method of providing streaming content of the content transmission control device 130 according to an embodiment of the present invention.
- the content transmission control device 130 monitors the network 150 to receive a request for streaming content transmitted from the terminal device 110 to the content providing server 140 or to the local caching device 120.
- a request for streaming content is received.
- the content transmission control apparatus 130 determines whether the requested streaming content is registered in the streaming list 132a in order to determine whether the requested streaming content is already received through step S501 (S503).
- step S503 if the requested streaming content is not registered in the streaming list 132a, the content transmission control device 130 determines that the requested streaming content is not already received, and from the content providing server 140 The streaming content is received and delivered to the local caching apparatus 120 (S505).
- the content transmission control device 130 determines that the requested streaming content is already received, the content providing server 140 The streaming content is received from the branched content, and the branched streaming content is delayed by a predetermined time and transmitted to the local caching apparatus 120 (S507).
- the preset time may be a time required for the terminal device 110 to reproduce one divided chunk of the requested streaming content, but is not limited thereto.
- FIG. 6 is another flowchart illustrating a method of providing streaming content of the content transmission control device 130 according to an embodiment of the present invention.
- the content transmission control device 130 monitors the network 150 to receive a request for streaming content that the terminal device 110 transmits to the content providing server 140, or the local caching device 120.
- a request for streaming content is received.
- the content transmission control apparatus 130 determines whether the requested streaming content is registered in the streaming list 132a in order to determine whether the requested streaming content is already received in step S601 (S603).
- step S603 when the requested streaming content is not registered in the streaming list 132a, the content transmission control device 130 determines that the requested streaming content is not already being received, and receives it through step S601.
- the request for streaming content is delivered to the content providing server 140 (S605).
- the content transmission control device 130 monitors the network 150 and receives streaming content transmitted from the content providing server 140 to the terminal device 110 (S607).
- the content transmission control device 130 registers the streaming content received through the streaming list 132a through step S607 and registers the terminal device 110 requesting the streaming content in the subscriber information 132b (S609).
- the content transmission control device 130 transmits the streaming content received through the S607 step to the local caching device 120 (S611).
- step S603 when the requested streaming content is registered in the streaming list 132a, the content transmission control device 130 determines that the requested streaming content is already received, the subscriber information (132b) The terminal device 110 that has requested the streaming content is registered (S613).
- the content transmission control device 130 branches the previously requested streaming content, and delays the branched streaming content by a predetermined time (S615).
- the content delivery control device 130 transmits the delayed streaming content to the local caching device 120 through step S615 (S617).
- the content transmission control device 130 determines whether a caching hit notification is received from the local caching device 120, and determines whether or not the prefix caching hit for the streaming content of the local caching device 120 is performed (S619).
- step S619 when the caching hit notification is received, the content transmission control device 130 determines that the prefix caching of the streaming content of the local caching device 120 is hit, and stops the delivery of the delayed streaming content. Instead, the device 20 transmits a chunk identifier for identifying the divided chunk for the delayed streaming content to the local caching device 120 until a stop request for streaming content is received from the local caching device 120 (S621).
- FIG. 7 is a flowchart illustrating a method of stopping providing streaming content by the content transmission control device 130 according to an exemplary embodiment.
- the content transmission control device 130 monitors the network 150 and receives a stop request for streaming content transmitted from the terminal device 110 to the content providing server 140 (S701).
- the content delivery control device 130 stops transmitting the streaming content or the chunk identifier that is being transmitted to the local caching device 120 (S703). In addition, the content transmission control device 130 deletes the terminal device 110 requesting to stop the step S701 registered in the subscriber information (132b) (S705).
- the content transmission control device 130 determines whether the number of the terminal devices 110 that receives the streaming content requested to stop the step S701 registered in the subscriber information 132b is 0 (S707).
- step S707 when the number of the terminal device 110 that receives the interrupted streaming content is greater than zero, the content transmission control device 130 waits without performing the following steps.
- step S707 when the number of the terminal device 110 that receives the streaming content requested to be interrupted is 0, the content transmission control device 130 is streaming is requested to stop receiving from the content providing server 140 The reception of the content is stopped (S709).
- the content transmission control device 130 deletes the streaming content that is requested to stop registered in the streaming list 132a (S711).
- FIG. 8 is a flowchart illustrating a method of providing streaming content of the local caching apparatus 120 according to an exemplary embodiment.
- the local caching apparatus 120 monitors the network 150 and receives a request for streaming content transmitted from the terminal apparatus 110 to the content providing apparatus 140 (S801).
- the local caching apparatus 120 transmits the request for the streaming content received through the step S801 to the content transmission control device 130 (S803).
- the local caching apparatus 120 receives streaming content from the content transmission control apparatus 130 in response to the request delivery in step S803 (S805).
- the local caching apparatus 120 determines whether the chunk corresponding to the divided chunk for the streaming content received through the step S805 is stored, and determines whether to hit the prefix caching for the streaming content (S807).
- the local caching apparatus 120 may determine that the requested streaming content is the same when constant constants of the divided chunks of the streaming content received through the step S805 are continuously hit. Can be.
- the local caching apparatus 120 determines that the prefix caching for the requested streaming content is missed, and in step S805.
- the preset time may be a time required for the constant constant number of the divided chunks for the streaming content received through the step S805 to be reproduced through the terminal device 110, but is not limited thereto.
- the storage time of the storage may recognize that the user of the terminal device 110 receives the streaming content in real time.
- the time may not be long enough, but the time may be long enough to be close to the limit supported by the physical environment of the local caching apparatus 120. Then, the local caching apparatus 120 transmits the received streaming content to the terminal device 110 through the step S805 until receiving a stop request for streaming content from the terminal device 110 (S811).
- the local caching apparatus 120 determines that the prefix caching for the requested streaming content is hit, and the content The transmission control device 130 transmits a caching hit notification for the streaming content. Instead of stopping the reception of the streaming content, the local caching apparatus 120 receives the chunk identifier from the content transmission control apparatus 130 (S815). In operation S817, the local caching apparatus 120 transmits the streaming content to the terminal device 110 using the chunk identifier received in operation S815. Here, the local caching device 120 may transmit the streaming content to the terminal device 110 until the local caching device receives a stop request for the streaming content from the terminal device 110.
- the content delivery system 100 by providing a content delivery service, by allowing the caching (Splitting) along with the splitting (Splitting) to the local caching apparatus 120 As a result, network traffic load and traffic concentration on content providers may be reduced due to redundant transmission of content.
- the content delivery system 100 by the content delivery control device 130 for branching the streaming content being received, and delayed the branched streaming content delivered to the local caching device 120, Allows the transmission of streaming content to the terminal device 110 using the prefix caching of the local caching device 120.
- Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
- an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.
- ASICs application specific integrated circuits
- DSPs digital signal processors
- DSPDs digital signal processing devices
- PLDs programmable logic devices
- FPGAs field programmable gate arrays
- processors controllers, microcontrollers, microprocessors, and the like.
- an embodiment of the present invention is implemented in the form of a module, a procedure, a function, etc. for performing the above-described functions or operations, so that the recording medium can be read by various computer means.
- the recording medium may include a program command, a data file, a data structure, etc. alone or in combination.
- Program instructions recorded on the recording medium may be those specially designed and constructed for the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts.
- the recording medium may be magnetic media such as hard disks, floppy disks and magnetic tapes, optical disks such as Compact Disk Read Only Memory (CD-ROM), digital video disks (DVD), Magnetic-Optical Media, such as a Disk, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, Flash Memory, and the like.
- program instructions may include high-level language code that can be executed by a computer using an interpreter as well as machine code such as produced by a compiler.
- Such hardware devices may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.
- the device or the terminal according to the present invention may be driven by a command that causes one or more processors to perform the functions and processes described above.
- such instructions may include interpreted instructions, such as script instructions such as JavaScript or ECMAScript instructions, or executable instructions or other instructions stored on a computer readable medium.
- the device according to the present invention may be implemented in a distributed manner over a network, such as a server farm, or may be implemented in a single computer device.
- a computer program (also known as a program, software, software application, script or code) mounted on an apparatus according to the invention and executing a method according to the invention comprises a compiled or interpreted language or a priori or procedural language. It can be written in any form of programming language, and can be deployed in any form, including stand-alone programs or modules, components, subroutines, or other units suitable for use in a computer environment. Computer programs do not necessarily correspond to files in the file system.
- a program may be in a single file provided to the requested program, in multiple interactive files (eg, a file that stores 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 in a markup language document).
- the computer program may be deployed to run on a single computer or on multiple computers located at one site or distributed across multiple sites and interconnected by a communication network.
- the local caching device when transmitting broadcast content in real time to a terminal device such as a smartphone, a laptop, a tablet, or a tablet, the local caching device delivers the content by performing caching together with the streaming content. It can be applied to the field of content delivery network (CDN). In addition, this has industrial applicability because there is not only a possibility of commercialization or sales but also a degree that can be clearly realized in reality.
- CDN content delivery network
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Abstract
Description
Claims (12)
- 네트워크에 분산 배치된 로컬 캐싱 장치 및 컨텐츠 제공 서버와 데이터를 송수신하는 통신부;상기 컨텐츠 제공 서버로부터 수신되는 하나 이상의 스트리밍 컨텐츠에 대한 정보인 스트리밍 목록을 포함하여 저장하는 저장부; 및상기 통신부를 통해 단말 장치로부터 상기 컨텐츠 제공 서버로 전송된 스트리밍 컨텐츠에 대한 요청을 수신하면, 상기 스트리밍 목록에 요청된 스트리밍 컨텐츠가 등록되어 있는지 판단하고, 상기 스트리밍 목록에 상기 요청된 스트리밍 컨텐츠가 등록되어 있는 경우, 상기 컨텐츠 제공 서버로부터 수신되는 스트리밍 컨텐츠를 분기하여 미리 설정된 시간만큼 지연시킨 후 상기 단말 장치로 전송시키는 제어부를 포함하는 컨텐츠 전송 제어 장치.
- 제1항에 있어서,상기 제어부는상기 스트리밍 목록에 상기 요청된 스트리밍 컨텐츠가 등록되어 있지 않는 경우, 상기 컨텐츠 제공 서버에 상기 스트리밍 컨텐츠에 대한 요청을 전달하고, 상기 요청에 의해 상기 컨텐츠 제공 서버로부터 전송된 스트리밍 컨텐츠를 수신하여 상기 단말 장치로 전달하고, 상기 스트리밍 목록에 상기 스트리밍 컨텐츠를 등록하는 것을 특징으로 하는 컨텐츠 전송 제어 장치.
- 제1항에 있어서,상기 제어부는상기 통신부를 통해 로컬 캐싱 장치로부터 상기 스트리밍 컨텐츠에 대한 캐싱 히트 알림을 수신하면, 상기 지연시킨 스트리밍 컨텐츠 대신에, 컨텐츠 제공 서버로부터 수신된 상기 스트리밍 컨텐츠의 분할된 청크(Chunk)를 식별하기 위한 청크 식별자(Signature)를 상기 로컬 캐싱 장치에 전송하는 것을 특징으로 하는 컨텐츠 전송 제어 장치.
- 제1항에 있어서,상기 저장부는상기 스트리밍 컨텐츠를 전송 받는 하나 이상의 단말 장치에 대한 정보인 가입자 정보를 더 포함하여 저장하고,상기 제어부는상기 통신부를 통해 상기 요청된 스트리밍 컨텐츠를 전달하는 경우, 상기 가입자 정보에 상기 스트리밍 컨텐츠를 요청한 단말 장치를 등록하고, 상기 스트리밍 컨텐츠에 대한 중단 요청을 수신한 경우, 상기 가입자 정보에서 상기 중단을 요청한 단말 장치를 삭제하는 것을 특징으로 하는 컨텐츠 전송 제어 장치.
- 제4항에 있어서,상기 제어부는상기 가입자 정보에 등록된 단말 장치의 수가 0인 경우, 상기 컨텐츠 제공 서버로부터 상기 스트리밍 컨텐츠의 수신을 중단하고, 상기 스트리밍 목록에서 상기 스트리밍 컨텐츠를 삭제하는 것을 특징으로 하는 컨텐츠 전송 제어 장치.
- 네트워크를 통해 데이터를 송수신하는 통신부;스트리밍 컨텐츠를 저장하는 저장부; 및단말 장치로부터 스트리밍 컨텐츠에 대한 요청이 발생하면, 컨텐츠 전송 제어 장치를 통해 상기 단말 장치로 전송되는 스트리밍 컨텐츠를 수신하여, 수신된 스트리밍 컨텐츠와 동일한 스트리밍 컨텐츠가 상기 저장부에 저장되어 있는 지를 판단하고, 동일한 스트리밍 컨텐츠가 저장되어 있는 경우, 상기 컨텐츠 전송 제어 장치에 캐싱 히트 알림을 전송한 후, 상기 컨텐츠 전송 제어 장치로부터 제공되는 청크 식별자에 따라서, 저장된 스트리밍 컨텐츠를 상기 단말 장치에 전송하는 제어부를 포함하는 로컬 캐싱 장치.
- 제6항에 있어서,상기 제어부는동일한 스트리밍 컨텐츠가 저장되어 있지 않는 경우, 수신된 스트리밍 컨텐츠를 일정 시간 동안 상기 저장부에 저장시키는 것을 특징으로 하는 로컬 캐싱 장치.
- 컨텐츠 전송 제어 장치가 네트워크를 통해 단말 장치로부터 컨텐츠 제공 서버로 전송되는 스트리밍 컨텐츠에 대한 요청을 수신하는 단계;상기 컨텐츠 전송 제어 장치가 상기 컨텐츠 제공 서버로부터 수신되는 하나 이상의 스트리밍 컨텐츠에 대한 정보인 스트리밍 목록에 상기 요청된 스트리밍 컨텐츠가 등록되어 있는지 판단하는 단계;상기 판단 결과, 상기 스트리밍 목록에 상기 요청된 스트리밍 컨텐츠가 등록되어 있는 경우, 상기 컨텐츠 전송 제어 장치가 상기 컨텐츠 제공 서버로부터 수신되는 해당 스트리밍 컨텐츠를 분기 및 지연시켜 상기 네트워크를 통해 상기 단말 장치로 전송시키는 제1 전송 단계; 및상기 판단 결과, 상기 스트리밍 목록에 상기 요청된 스트리밍 컨텐츠가 등록되어 있지 않는 경우, 상기 컨텐츠 전송 제어 장치가 상기 컨텐츠 제공 서버로 상기 요청을 전달한 후, 상기 컨텐츠 제공 서버로부터 전송된 스트리밍 컨텐츠를 수신하여 상기 네트워크를 통해 상기 단말 장치로 전송시키는 제2 전송 단계를 포함하는 컨텐츠 전송 방법.
- 제8항에 있어서,상기 제1 전송 단계는상기 컨텐츠 전송 제어 장치가 상기 컨텐츠 제공 서버로부터 수신되는 스트리밍 컨텐츠를 분기하여 미리 설정된 시간만큼 지연시키는 단계; 및상기 컨텐츠 전송 제어 장치가 상기 지연된 스트리밍 컨텐츠를 로컬 캐싱 장치를 통해서 상기 단말 장치로 전달하는 단계를 포함하는 것을 특징으로 하는 컨텐츠 전송 방법.
- 제8항에 있어서,상기 제2 전송 단계는상기 컨텐츠 전송 제어 장치가 상기 컨텐츠 제공 서버에 스트리밍 컨텐츠에 대한 상기 요청을 전달하는 단계;상기 컨텐츠 전송 제어 장치가 상기 컨텐츠 제공 서버로부터 요청된 스트리밍 컨텐츠를 수신하는 단계;상기 컨텐츠 전송 제어 장치가 상기 스트리밍 목록에 상기 스트리밍 컨텐츠를 등록하는 단계; 및상기 컨텐츠 전송 제어 장치가 상기 스트리밍 컨텐츠를 로컬 캐싱 장치를 통해서 상기 단말 장치에 전달하는 단계를 포함하는 것을 특징으로 하는 컨텐츠 전송 방법.
- 제8항에 있어서,상기 컨텐츠 전송 제어 장치가 로컬 캐싱 장치로부터 상기 지연된 스트리밍 컨텐츠에 대한 캐싱 히트 알림을 수신하면, 상기 지연된 스트리밍 컨텐츠 대신에, 상기 지연된 스트리밍 컨텐츠의 청크(Chunk)를 식별하기 위한 청크 식별자(Signature)를 상기 로컬 캐싱 장치에 전송하는 단계를 더 포함하는 것을 특징으로 하는 컨텐츠 전송 방법.
- 제8항 내지 제11항 중 어느 한 항에 따른 컨텐츠 전송 방법을 실행시키는 프로그램을 기록한 컴퓨터 판독 가능한 기록매체.
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CN201580020256.1A CN106256132B (zh) | 2014-04-18 | 2015-04-17 | 用于实时发送广播内容的方法及其装置 |
EP15780285.1A EP3133824B1 (en) | 2014-04-18 | 2015-04-17 | Method for transmitting broadcasting contents in real-time and device for same |
JP2017506241A JP6302597B2 (ja) | 2014-04-18 | 2015-04-17 | リアルタイム放送コンテンツ伝送方法及びそのための装置 |
US15/296,291 US10298637B2 (en) | 2014-04-18 | 2016-10-18 | Method for transmitting broadcasting contents in real-time and device for same |
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KR20140021371A (ko) * | 2012-08-10 | 2014-02-20 | 에스케이텔레콤 주식회사 | 컨텐츠 식별 정보를 이용한 컨텐츠 전송 서비스 시스템, 이를 위한 장치 및 그의 컨텐츠 전송 서비스 방법 |
KR20140024553A (ko) * | 2012-08-20 | 2014-03-03 | 에스케이텔레콤 주식회사 | 라이브 스트리밍 컨텐츠를 위한 컨텐츠 전송 서비스 방법, 및 이를 위한 장치 |
KR20140031433A (ko) * | 2012-08-28 | 2014-03-13 | 에스케이텔레콤 주식회사 | 컨텐츠 전송 시스템 및 방법 |
KR20140032064A (ko) * | 2012-09-05 | 2014-03-14 | 에스케이텔레콤 주식회사 | 컨텐츠 전송 서비스 방법, 이를 위한 캐시 장치 |
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