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WO2018084360A1 - Système de moteur de relais de diffusion en continu de réseau sans fil efficace utilisant une commande de tampon multimédia - Google Patents

Système de moteur de relais de diffusion en continu de réseau sans fil efficace utilisant une commande de tampon multimédia Download PDF

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Publication number
WO2018084360A1
WO2018084360A1 PCT/KR2016/013915 KR2016013915W WO2018084360A1 WO 2018084360 A1 WO2018084360 A1 WO 2018084360A1 KR 2016013915 W KR2016013915 W KR 2016013915W WO 2018084360 A1 WO2018084360 A1 WO 2018084360A1
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WIPO (PCT)
Prior art keywords
media
media file
file
module
wireless network
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Ceased
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PCT/KR2016/013915
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English (en)
Korean (ko)
Inventor
주홍택
안동혁
권동우
제희광
김현우
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Industry Academic Cooperation Foundation of Keimyung University
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Industry Academic Cooperation Foundation of Keimyung University
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Publication of WO2018084360A1 publication Critical patent/WO2018084360A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1013—Network architectures, gateways, control or user entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present invention relates to an efficient wireless network streaming relay engine system using media buffer control. More particularly, the present invention relates to stream data buffering in member devices for relay devices in heterogeneous wireless networks, thereby preventing unnecessary network resource contention for immediate playback. The present invention relates to an efficient wireless network streaming relay engine system using media buffer control to reduce and freeze bandwidth to prevent freezing of media playback.
  • a method of providing a multimedia streaming service by hierarchically configuring a heterogeneous wireless network has been proposed, but such a method can provide multimedia data between heterogeneous networks through a relay device commonly connected to a network configured for streaming.
  • the method of configuring a hierarchical heterogeneous wireless network has an effect of improving bandwidth compared to a single channel using multiple wireless channels.
  • the multimedia streaming is performed, a plurality of member devices are connected to the relay device.
  • the playback picture freezes due to temporary buffer depletion by device. Such playback stoppages occur because of excessive competition among member devices, which instantly lowers the fairness of bandwidth usage of the corresponding channel.
  • a media device requests and downloads a media to a source device having original media, and at the same time, the member devices request media to the relay device and stream while the streaming device is in progress. Since they simultaneously request and play media from the relay device, there is a problem of depletion of buffers that some member devices cannot receive the media stream due to bandwidth contention. As a result, a buffering operation, which is an operation of receiving the media stream data and filling the buffer, occurs frequently. As a result, the media may not be played smoothly and a freeze occurs.
  • a method of transmitting media from a server according to the weight may be applied to weighting nodes to deliver multimedia.
  • the dependence on the server and the management cost of the server for the member devices increases due to the characteristics of the mobile device that the participation and withdrawal of the service is relatively frequent.
  • the present invention is proposed to solve the above problems of the conventionally proposed methods, a source device for providing the original media, a relay device for receiving and relaying the media of the source device, and requesting media from the relay device Including a plurality of member devices provided to play, and configured to control the stream data buffering between the relay device and the member devices, to prevent excessive network occupancy between the member devices, and to minimize the problem of freezing the playback screen due to buffer exhaustion It is an object of the present invention to provide an efficient wireless network streaming relay engine system using media buffer control.
  • the present invention is configured to control media request and stream data buffering at member devices for a relay device, thereby reducing contention of network resources unnecessary for immediate playback and enabling effective bandwidth to be secured.
  • Another object of the present invention is to provide an efficient wireless network streaming relay engine system.
  • the present invention unlike the existing need to modify the kernel of the link layer or operating system, by implementing a streaming service in the application layer, because of the high applicability and controlling the bandwidth usage on the member device side of the client to the media server It is another object of the present invention to provide an efficient wireless network streaming relay engine system using media buffer control, which enables low dependency on a functioning relay device and improves scalability.
  • a relay device for requesting media from the source device to download the media in a stream manner and storing the media on a disc, and relaying the media stored in the disc in a stream manner in response to a media request of member devices;
  • the member device which requests the media stored as a file to the relay device to download and play the media in a stream manner, but periodically performs a media request in units of the size of the media file to be downloaded at once based on the monitoring control of the stream data buffering. Including them are characterized by their construction.
  • the wireless network streaming relay engine system Preferably, the wireless network streaming relay engine system,
  • the source device and the relay device are configured to be connected and connected to an IEEE 802.11 infrastructure network through one wireless access point (AP), and the relay device and the member devices are connected to and connected through a Wi-Fi Direct network. You can configure the network.
  • AP wireless access point
  • the relay device More preferably, the relay device,
  • the member devices requesting media streaming may be grouped as a group member on a Wi-Fi Direct network to serve as a group owner of the member devices.
  • the source device Preferably, the source device,
  • the original media file may be stored and the stored media may be provided in a stream manner in response to a media request of the relay device.
  • the relay device Preferably, the relay device, the relay device, and
  • a media file manager which requests and downloads a media file from the source device and stores the media file on a disk;
  • a media player manager for allowing the media file manager to read and play a file stored on a disk
  • an HTTP server manager reads the media file from the disk and transmits the media file to the corresponding member device.
  • the media file manager MMM
  • a media file download module (MFD Module) for requesting and downloading a media file from the source device;
  • the media file download module may be configured as a media file writer (MFW) for storing the media file downloaded from the source device on a disk.
  • MFW media file writer
  • the media player manager (MPM) More preferably, the media player manager (MPM),
  • MP Module media player module
  • HTTP server manager More preferably, the HTTP server manager (HSM),
  • Receives a streaming request of the media from the member device using the HTTP protocol it can be implemented using NanoHTTPD provided as open source.
  • each of the member devices Preferably, each of the member devices,
  • a media file manager for requesting and downloading a media file in units of a size of a media file to be downloaded at a time set in advance according to the size and time of the media file to the relay device and storing it on a disk;
  • the media file manager may play a file stored in a disk, and may include a media player manager (MPM) that continuously monitors and checks the buffer of the media play and periodically requests the download of the media file.
  • MPM media player manager
  • the media file manager MMM
  • a media file download module for requesting and downloading a media file to the relay device based on a size and time of a media file to be downloaded at one time according to the size and time of the media file;
  • the media file download module may include a media file writer (MFW) for storing a piece of media file downloaded in units of a size of a media file to be downloaded from the relay device on a disk.
  • MFW media file writer
  • the media file download module (MFD Module)
  • the media file fragments may be periodically downloaded until the media playback is completed in units of the size of the media file to be downloaded at one time from the relay device.
  • the media file download module (MFD Module)
  • the media file fragments may be periodically downloaded in the unit of the size of the media file to be downloaded at one time, and the media file fragments may be sequentially arranged.
  • the media file download module (MFD Module)
  • the media file fragments are periodically downloaded until the media playback is completed in units of the size of the media file to be downloaded from the relay device at once. You can stop the download request for a file fragment or wait.
  • the media file download module (MFD Module)
  • the media file writer (MFW)
  • the media file download module stores the downloaded media file fragment in the unit of the size of the media file to be downloaded from the relay device on a disk
  • the media file fragment can be downloaded from an arbitrary position by using RandomAccessFile. Can be.
  • the media player manager (MPM) More preferably, the media player manager (MPM),
  • a media player module (MP Module) for reading and playing the file stored in the disk
  • BM Module buffer management module
  • the buffer management module (BM Module)
  • the download module may control to receive the media file.
  • the media player module (MP Module)
  • a media player capable of reading and playing a file stored in the disk, it may be implemented using a VideoView or MidiaPlayer provided by Android.
  • the media player module (MP Module)
  • the member device More preferably, the member device,
  • Each member device controls the media request and stream data buffering for the relay device so that the periodic buffer check and file download process can be performed repeatedly during the media file playback after the media playback starts. It can serve to reduce network usage and network congestion by reducing media streaming that is not required for media playback of the network, and to prevent excessive network resource contention and deterioration of bandwidth fairness among member devices in the network.
  • a source device providing original media
  • a relay device receiving and relaying media of the source device, and requesting media from the relay device
  • the member devices for the relay device by configuring the member devices for the relay device to control the media request and stream data buffering, it is possible to reduce the contention of network resources unnecessary for immediate playback, and to effectively secure the available bandwidth.
  • the present invention unlike the existing need to modify the kernel of the link layer or operating system, by implementing a streaming service in the application layer, because of the high applicability and controlling the bandwidth usage on the member device side of the client to the media server The dependence on a functioning relay device is low and scalability can be improved.
  • FIG. 1 is a conceptual diagram of a heterogeneous wireless network structure and media stream data relay of an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention.
  • FIG. 2 is a diagram schematically illustrating a media request process of a streaming relay device of an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention.
  • FIG. 3 is a block diagram illustrating the configuration of an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention.
  • FIG. 4 illustrates a structure of a streaming relay engine applied to a relay device of an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating a streaming relay engine structure applied to member devices of an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating an example of an implementation result of an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention.
  • FIG. 7 is a diagram illustrating an average playback picture stop count for each bit rate as a performance evaluation result of an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention.
  • FIG. 8 is a diagram illustrating a performance evaluation result of an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention.
  • FIG. 1 is a diagram illustrating the structure of a heterogeneous wireless network structure and a media stream data relay of an efficient wireless network streaming relay engine system using a media buffer control according to an embodiment of the present invention
  • FIG. 2 is an embodiment of the present invention.
  • Efficient wireless network using media buffer control according to an exemplary embodiment schematically illustrating a media request process of a streaming relay device of a streaming relay engine system
  • FIG. 3 is an efficient wireless network using media buffer control according to an embodiment of the present invention
  • 4 is a block diagram illustrating the structure of a streaming relay engine system
  • FIG. 4 illustrates a structure of a streaming relay engine applied to a relay device of an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention.
  • FIG. 4 illustrates a structure of a streaming relay engine applied to a relay device of an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention.
  • an efficient wireless network streaming relay engine system using media buffer control includes a source device 100, a relay device 200, and a plurality of members.
  • the device 300 may be configured.
  • the source device 100 and the relay device 200 are connected to one wireless access point (AP). It is configured to be connected and connected to the IEEE 802.11 infrastructure network through, and the relay device 200 and the member device 300 may configure a heterogeneous network connected and connected to the Wi-Fi Direct network.
  • the relay device 200 binds the member devices 300 requesting media streaming to the group members on the Wi-Fi Direct network so as to act as a group owner of the member devices.
  • the source device 100 is a configuration for providing original media.
  • the source device 100 stores the original media file and provides the stored media in a stream manner in response to a media request of the relay device 200 which will be described later.
  • the relay device 200 requests the media from the source device 100 to download the media in a stream manner, stores the media in the disk 201, and responds to the media requests of the member devices 300 to be described later. It is a configuration to relay the media stored in the stream method.
  • the relay device 200 includes a media file manager (MFM) 210 which requests and downloads a media file from the source device 100 and stores it in a disk 201.
  • MFM media file manager
  • MPM media player manager
  • the disk 201 It may be configured to include an HTTP server manager (HSM) 230 to read the media file in the transmission to the corresponding member device (300).
  • the media file manager (MFM) 210 includes a media file download module (MFD Module) 211 for requesting and downloading a media file from the source device 100, and a media file download module.
  • a media file writer (MFW) 212 for storing the media file downloaded from the source device 100 in the disk 201 at 211.
  • the media player manager (MPM) 220 may include a media player module (MP Module) 221 for reading and playing a file stored in the disk 201.
  • the HTTP server manager (HSM) 230 may receive a streaming request of the media from the member device 300 using the HTTP protocol, and may be implemented using NanoHTTPD provided as an open source.
  • the plurality of member devices 300 requests the media stored as a file from the relay device 200 to download and play the media in a stream manner, but the size of the media file to be downloaded at one time based on monitoring control of the stream data buffering. It is a configuration that periodically executes media requests in units.
  • the member device 300 is connected to the relay device 200 so that each member device 300 may periodically perform a buffer check and a file download process after the media playback starts.
  • media streaming is not required for current media playback, reducing network usage and network congestion, and avoiding excessive network resource contention and bandwidth fairness between member devices on the network. Function as possible. Equation 1 below is a formula for calculating the size of stream data to be requested when the member device 300 requests media stream data from the relay device 200.
  • S total means the total size of the original media
  • D total means the total playing time of the original media. In other words, dividing S total by D total makes it possible to estimate the size of stream data required to play media for approximately one second.
  • the D range value means a minimum reproduction time of stream data requested by the member device 300. For example, if a user wants to download and download a stream data fragment of at least 10 seconds for media playback, this value is set to 10 to request a media stream data fragment that can be played for approximately 10 seconds. Since most multimedia has variable bit rate (VBR), the bit rate of a specific point in time may be higher than the average bit rate of the entire media. In this case, a relatively larger S download value may be required. Can be.
  • VBR variable bit rate
  • the ⁇ value is used to correct the S download value according to the variable bit rate. If the S download value is not corrected, as the D range in multimedia with a variable bit rate since the time of download requests and then stream data can cause errors due to the lack of stream data because the media playback is interrupted before the
  • the S download value which is the amount of stream data to guarantee the playback time, is set to a value of ⁇ obtained through experiments. That is, when the member device 300 requests the media from the relay device 200, the S download value represents the capacity of the media stream data piece to be periodically requested to play the media for the D range time.
  • each of the member devices 300 requests the relay device 200 to request a media file in units of sizes of media files to be downloaded at one time, which are preset according to the size and time of the media file.
  • a media file manager (MFM) 310 for storing and downloading to the disk 301 and a file stored in the disk 301 by the media file manager 310, and continuing the buffer of the media play. It may be configured to include a media player manager (MPM) 320 to monitor and check the periodic download of the media file.
  • MPM media player manager
  • the media file manager (MFM) 310 requests a media file in the unit of a size of a media file to be downloaded at one time according to the size and time of the media file from the relay device 200.
  • the media file download module (MFD Module) 311 to download and the media file fragments downloaded in the unit of the size of the media file to be downloaded at a time from the relay device 200 in the media file download module 311 disk (301) Media file writer (MFW) 312 to store in.
  • the media file download module (MFD Module) 311 periodically uses the HTTP protocol communication until the media playback is completed in pieces of media file in units of the size of the media file to be downloaded at one time from the relay device 200. You can download it.
  • the media file download module (MFD Module) 311 may repeatedly download the media file fragments in units of the size of the media file to be downloaded at a time, so that the media file fragments may be sequentially arranged.
  • the media file download module (MFD Module) 311 periodically uses the HTTP protocol communication until the media file is finished playing the piece of media file in units of the size of the media file to be downloaded at one time from the relay device 200. If the user stops playing the media while the media is being played, the download request for the piece of media file may be stopped or held.
  • the media file download module (MFD Module) 311 may request a stream media file fragment by the size unit of the media file to be downloaded at a time using a range header of the HTTP protocol for the media file to be streamed.
  • the media file writer (MFW) 312 uses the RandomAccessFile when the media file download module 311 stores the downloaded media file fragment in the unit of the size of the media file to be downloaded from the relay device 200 at once. It can be implemented so that the media file fragment can be downloaded from any location.
  • the media player manager (MPM) 320 may include a media player module (321) and a media player module (321) for reading and playing a file stored in the disk 301. It can be configured to include a buffer management module (BM Module) 322 for continuously monitoring and checking the buffer of the media player during the playback of the media through.
  • BM Module buffer management module
  • the media player module (MP Module) 321 is a media player capable of reading and playing a file stored in the disk 301, and may be implemented using a VideoView or MidiaPlayer provided by Android.
  • the media player module (MP Module) 321 receives the current playback position value of the VideoView or MidiaPlayer in seconds so as to periodically play the newly downloaded portion through the buffer management module 322 and receives the currently set media file. Through this, when the media file can no longer be played, the play position can be updated again to the play position.
  • the buffer management module (BM Module) 322 checks the media amount of the buffer based on the monitoring confirmation of the stream data buffering of the media player, and downloads the next piece of media file to be played when the remaining media amount is not sufficient.
  • a file download module (MFD Module) 311 may be requested, and the media file download module 311 may be controlled to receive a media file.
  • FIG. 6 is a diagram illustrating an example of an implementation result of an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention.
  • FIG. 6 illustrates a heterogeneous wireless network through a streaming relay engine implemented in a relay device 200 and member devices 300 implemented in an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention.
  • This shows the progress of media streaming relay. That is, when the source device 100 starts media streaming and the relay device 200 requests media from the source device 100 and downloads the media, the media device 100 plays the media. A screen is displayed in which the media is played while S media is downloaded by S download .
  • FIG. 7 is a diagram illustrating the performance evaluation of an efficient wireless network streaming relay engine system using a media buffer control according to an embodiment of the present invention. As a result of performance evaluation of an efficient wireless network streaming relay engine system using a media buffer control according to an embodiment, it is a diagram showing a playback picture stop average and minimum / maximum time for each bit rate.
  • FIG. 7 is a graph illustrating an average number of screen stops for each of the member relays 300 of the relaying method which does not perform the buffering control and the relaying method through the buffering control of the present invention. In FIG. 7, it can be seen that the number of playback screen stops occurs less frequently in the relay method of the present invention than in the conventional relay method.
  • FIG. 8 is a graph illustrating the average of the minimum / maximum / average time of one screen stop for each member device 300 of the relay method through the buffering control according to the present invention and the bit rate.
  • FIG. 8 shows that when the screen stop occurs in the relay method according to the present invention, less time is required before the buffering is completed and playback starts again.
  • the playback of the buffering control according to the present invention is quickly recovered about 5.52 seconds.
  • the number of playback screen stops and the screen stop time of the relay method through the buffering control according to the present invention are significantly reduced than the conventional relay method.
  • the member device controls the buffering of the media stream data, thereby preventing excessive bandwidth competition between member devices and preventing fairness of network bandwidth usage. That is, through the relay buffering control, the frame collision and contention occurring in the wireless channel through which the streaming relay is performed is reduced, and the bandwidth is delayed to reduce the delay time due to the stream buffering wait. Time can be reduced to improve the quality of multimedia streaming experienced by service users.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Information Transfer Between Computers (AREA)

Abstract

L'invention concerne un système de moteur de relais de diffusion en continu de réseau sans fil efficace utilisant une commande de tampon multimédia, comprenant : un dispositif source permettant de fournir des supports d'origine ; un dispositif de relais permettant de recevoir et de relayer des supports du dispositif source ; et une pluralité de dispositifs d'élément permettant de demander et de recevoir des supports à partir du dispositif de relais et de reproduire les supports reçus, le système pouvant, par une configuration permettant de commander la mise en mémoire tampon de données de diffusion en continu entre le dispositif de relais et les dispositifs d'élément, empêcher une occupation excessive de réseau entre les dispositifs d'élément et réduire au minimum un problème d'arrêt d'écran de reproduction provoqué par un appauvrissement de tampon.
PCT/KR2016/013915 2016-11-01 2016-11-29 Système de moteur de relais de diffusion en continu de réseau sans fil efficace utilisant une commande de tampon multimédia Ceased WO2018084360A1 (fr)

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KR1020160144671A KR101869360B1 (ko) 2016-11-01 2016-11-01 미디어 버퍼 제어를 이용한 효율적인 무선 네트워크 스트리밍 중계 엔진 시스템
KR10-2016-0144671 2016-11-01

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KR102502577B1 (ko) 2018-08-30 2023-02-22 삼성전자주식회사 외부 전자 장치 내에서 멀티미디어 콘텐트를 이어서 재생하기 위한 전자 장치 및 방법

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