WO2018084360A1

WO2018084360A1 - Efficient wireless network streaming relay engine system using media buffer control

Info

Publication number: WO2018084360A1
Application number: PCT/KR2016/013915
Authority: WO
Inventors: 주홍택; 안동혁; 권동우; 제희광; 김현우
Original assignee: 계명대학교 산학협력단
Priority date: 2016-11-01
Filing date: 2016-11-29
Publication date: 2018-05-11
Also published as: KR101869360B1; KR20180047866A

Abstract

An efficient wireless network streaming relay engine system using media buffer control proposed by the present invention comprises: a source device for providing original media; a relay device for receiving and relaying media of the source device; and a plurality of member devices for requesting and receiving media from the relay device and reproducing the received media, wherein, by configuring to control stream data buffering between the relay device and the member devices, the system can prevent excessive network occupation between the member devices and minimize a reproducing screen stop problem due to buffer depletion.

Description

Efficient Wireless Network Streaming Relay Engine System Using Media Buffer Control

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.

Recently, with the spread and spread of mobile smart devices, it is possible to provide Internet services on various mobile devices other than personal computers, and technology for sharing multimedia contents among a plurality of devices is provided along with the spread of cloud services. In particular, application services such as smart conferencing and smart training are connected to a single wireless LAN environment such as conference halls and classrooms to share multimedia contents among devices, but when applying existing technologies in a single wireless LAN environment, Due to the network bandwidth limitation of the wireless channel, there is a problem of low scale scalability. This problem occurs because devices do not have sufficient network bandwidth as they share wireless network resources.

As a solution to this problem, 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. To pass. That is, the method of configuring a hierarchical heterogeneous wireless network has an effect of improving bandwidth compared to a single channel using multiple wireless channels. However, when the multimedia streaming is performed, a plurality of member devices are connected to the relay device. There was a problem that 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. In other words, in the existing relay method, 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. This means that when requesting and downloading media for media playback, it requests as much as the specified remaining buffer of the device, downloads the media and starts playback, and uses a gradual download method so that excessive amounts of media data are not needed right away. This will cause a problem of increasing network competition due to increased network usage.

Meanwhile, as a method for solving bandwidth fairness problem between a relay device and a member device, a method of transmitting media from a server according to the weight may be applied to weighting nodes to deliver multimedia. There is a problem that 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.

In addition, 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.

In addition, 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.

An efficient wireless network streaming relay engine system using a media buffer control according to a feature of the present invention for achieving the above object,

An efficient wireless network streaming relay engine system using media buffer control,

A source device for providing original media;

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; And

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.

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.

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.

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.

Preferably, the relay device,

A media file manager (MFM) which requests and downloads a media file from the source device and stores the media file on a disk;

A media player manager (MPM) for allowing the media file manager to read and play a file stored on a disk; And

When the media file is requested from the member devices, an HTTP server manager (HSM) reads the media file from the disk and transmits the media file to the corresponding member device.

More preferably, the media file manager (MFM),

A media file download module (MFD Module) for requesting and downloading a media file from the source device; And

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.

More preferably, the media player manager (MPM),

It may include a media player module (MP Module) for reading and playing the file stored in the disk.

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.

Preferably, each of the member devices,

A media file manager (MFM) 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; And

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.

More preferably, the media file manager (MFM),

A media file download module (MFD 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; And

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.

Even more preferably, the media file download module (MFD Module),

By using the HTTP protocol communication, 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.

Even more preferably, 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.

Even more preferably, the media file download module (MFD Module),

By using the HTTP protocol communication, 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.

Even more preferably, the media file download module (MFD Module),

For the media file to be streamed, you can request a stream media file fragment by the size of the media file to be downloaded at once using the HTTP header Range header.

Even more preferably, the media file writer (MFW),

When 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.

More preferably, the media player manager (MPM),

A media player module (MP Module) for reading and playing the file stored in the disk; And

And a buffer management module (BM Module) for continuously monitoring and checking the buffer of the media player during playback of the media through the media player module.

Even more preferably, the buffer management module (BM Module),

Check the media amount of the buffer based on the monitoring confirmation of the stream data buffering of the media player, and request the media file download module (MFD Module) to download the next piece of media file to be played when the remaining media amount is not sufficient. The download module may control to receive the media file.

Even more preferably, the media player module (MP Module),

As 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.

Even more preferably, the media player module (MP Module),

Receives the current playback position value of VideoView or MidiaPlayer in seconds so that the newly downloaded portion can be played periodically through the buffer management module. When the media file can no longer be played through the currently set media file, the corresponding playback file is played again. The playback position can be updated with the position.

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.

According to the efficient wireless network streaming relay engine system using the media buffer control proposed by the present invention, a source device providing original media, a relay device receiving and relaying 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 You can do that.

In addition, according to the present invention, 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.

In addition, 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.

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.

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.

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.

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.

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.

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.

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.

100: Source Device

200: relay device

201: Disk

210: media file manager

211: Media File Download Module

212: Media File Writer

220: media player manager

221: media player module

230: HTTP server manager

300: Member Device

301: Disk

310: media file manager

311: Media File Download Module

312: Media File Writer

320: media player manager

321: media player module

322: buffer management module

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. However, in describing the preferred embodiment of the present invention in detail, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions.

In addition, in the specification, when a part is 'connected' to another part, it is not only 'directly connected' but also 'indirectly connected' with another element in between. Include. In addition, the term "comprising" a certain component means that the component may further include other components, except for the case where there is no contrary description.

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, and 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, and 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. One drawing, FIG. 5 A diagram showing a stream structure of a relay the engine applied to the efficient wireless network streaming members of the relay device engine system using a media buffer control according to an embodiment of the present invention. As shown in FIGS. 1 to 5, an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention includes a source device 100, a relay device 200, and a plurality of members. The device 300 may be configured.

In an efficient wireless network streaming relay engine system using media buffer control according to an embodiment of the present invention, as shown in FIG. 1, 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. Here, 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. Hereinafter, an efficient wireless network streaming relay engine system using media buffer control according to the present invention will be described in detail with reference to the accompanying drawings.

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. As shown in FIG. 3, 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. When the media file manager 210 receives a media file from the member player 300 and a media player manager (MPM) 220 that reads and plays a file stored in the disk 201, 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).

In addition, as illustrated in FIG. 4, 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. In addition, 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. In addition, 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. By controlling media request and stream data buffering for the network, 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.

Equation 1

In the above equation, 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. In addition, 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. As such, the α 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 α 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.

In addition, as shown in FIG. 3, 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.

As illustrated in FIG. 5, 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. Here, 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. In addition, 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. In addition, 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.

As illustrated in FIG. 5, 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. Here, 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. In addition, 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. In addition, 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.

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 .

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. In particular, when media playback of 4000 Kbps, which is the highest bit rate, the existing relay method has 8.83 times of screen freeze while the relay method of the present invention has a very small number of screen freezes of 2.45 times. 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. In particular, it can be seen that when the media relay with 4000Kbps bit rate is relayed, the playback of the buffering control according to the present invention is quickly recovered about 5.52 seconds. As a result of the experiment, it can be seen that 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. This is because 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.

The present invention described above may be variously modified or applied by those skilled in the art, and the scope of the technical idea according to the present invention should be defined by the following claims.

Claims

An efficient wireless network streaming relay engine system using media buffer control,

A source device 100 providing original media;

By requesting the media from the source device 100 to download the media in a stream manner and storing the media on the disk 201, and in response to the media request of the member devices 300, the media stored in the disk 201 can be relayed in a stream manner. Relay device 200; And

Requests the media stored as a file to the relay device 200 to download and play the media in a stream manner, and periodically performs a media request in units of the size of the media file to be downloaded at a time based on monitoring control of the stream data buffering. An efficient wireless network streaming relay engine system using media buffer control, characterized in that it comprises a member device (300).
The system of claim 1, wherein the wireless network streaming relay engine system comprises:

The source device 100 and the relay device 200 are configured to be connected and connected to an IEEE 802.11 infrastructure network through one wireless access point (AP), and the relay device 200 and the member device 300 are connected to each other. An efficient wireless network streaming relay engine system using a media buffer control, characterized in that for configuring a heterogeneous network connected and connected to the Wi-Fi Direct network.
The method of claim 2, wherein the relay device 200,

Efficient wireless network streaming relay engine system using a media buffer control, characterized in that the member device to request the streaming media (300) by grouping the group member on the Wi-Fi Direct network to act as a group owner of the member devices.
The method of claim 1, wherein the source device 100,

Efficient wireless network streaming relay engine system using a media buffer control, characterized in that for storing the original media file, and providing the stored media in a stream manner in response to a media request of the relay device (200).
The method of claim 1, wherein the relay device 200,

A media file manager (MFM) 210 for requesting and downloading a media file from the source device 100 and storing it in a disk 201;

A media player manager (MPM) 220 for allowing the media file manager 210 to read and play the file stored in the disk 201; And

When the media file is requested from the member devices 300, an HTTP server manager (HSM) 230 for reading the media file from the disk 201 and transmitting the media file to the corresponding member device 300 is configured. An efficient wireless network streaming relay engine system using media buffer control.
The media file manager (MFM) 210 of claim 5, wherein

A media file download module (MFD Module) 211 for requesting and downloading a media file from the source device 100; And

The media file download module 211 comprises a media file writer (MFW) 212 for storing the media file downloaded from the source device 100 on the disk 201, using media buffer control Efficient wireless network streaming relay engine system.
The method of claim 5, wherein the media player manager (MPM) 220,

Efficient wireless network streaming relay engine system using a media buffer control, characterized in that it comprises a media player module (MP Module) (221) to read and play the file stored in the disk (201).
The method of claim 5, wherein the HTTP server manager (HSM) 230,

Receiving a streaming request of media from the member device (300) using the HTTP protocol, it is implemented using NanoHTTPD provided as open source, efficient wireless network streaming relay engine system using media buffer control.
The method according to any one of claims 1 to 8, wherein each of the member devices 300,

A media file manager for requesting and downloading a media file in units of a size of a media file to be downloaded at one time, which is set in advance according to the size and time of the media file to the relay device 200, and then storing the media file in a disk 301. (MFM) 310; And

The media file manager 310 includes a media player manager (MPM) 320 which plays a file stored in the disk 301 and continuously monitors and checks the buffer of the media play and requests the download of the media file periodically. An efficient wireless network streaming relay engine system using media buffer control.
The method of claim 9, wherein the media file manager (MFM) 310,

A media file download module (MFD Module) 311 for requesting and downloading the media file to the relay device 200 in units of the size of the media file to be downloaded at one time according to the size and time of the media file; And

In the media file download module 311, the media file writer (MFW) 312 stores the downloaded piece of media file in the unit of the size of the media file to be downloaded at one time from the relay device 200. An efficient wireless network streaming relay engine system using media buffer control, characterized in that the configuration.
The method of claim 10, wherein the media file download module (MFD Module) 311,

Efficiently using the media buffer control, characterized in that by periodically downloading the media file fragments until the media playback is completed by the unit of the size of the media file to be downloaded from the relay device 200 at a time using HTTP protocol communication Wireless network streaming relay engine system.
The method of claim 11, wherein the media file download module (MFD Module) 311,

Efficiently downloading the media file piece by piece in the unit of the size of the media file to be downloaded at one time, characterized in that the media file pieces are sequentially contiguous, efficient wireless network streaming relay engine system using media buffer control.
The method of claim 11, wherein the media file download module (MFD Module) 311,

By using the HTTP protocol communication, 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 200 at one time, and the user stops the media playback during media playback. In the case of stopping the download request of the piece of media file or maintain a standby state, the efficient wireless network streaming relay engine system using media buffer control.
The method of claim 10, wherein the media file download module (MFD Module) 311,

Efficient wireless network streaming relay engine system using media buffer control, characterized by requesting stream media file fragments in units of size of media file to be downloaded at a time by using range header of HTTP protocol for media file to be streamed .
The media file writer (MFW) 312 of claim 10, wherein:

When the media file download module 311 stores a piece of media file downloaded in the unit of a size of a media file to be downloaded from the relay device 200 at a time, the piece of media file is deleted from an arbitrary location using a RandomAccessFile. Efficient wireless network streaming relay engine system using a media buffer control, characterized in that implemented to be downloaded.
The media player manager (MPM) 320 of claim 9, wherein

A media player module (MP Module) 321 for reading and playing a file stored in the disk 301; And

Efficient wireless network using a media buffer control, characterized in that it comprises 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 the media player module 321 Streaming relay engine system.
The method of claim 16, wherein the buffer management module (BM Module) 322,

The media amount of the buffer is checked based on the monitoring confirmation of the stream data buffering of the media player, and when the remaining media amount is not sufficient, the media file download module 311 requests the download of the next piece of media file to be played. And controlling the media file download module (311) to receive the media file.
The method of claim 16, wherein the media player module (MP Module) 321,

Efficient wireless network streaming relay engine system using a media buffer control, characterized in that implemented as a media player that can read and play the file stored in the disk (301) using a VideoView or MidiaPlayer provided by Android.
The method of claim 18, wherein the media player module (MP Module) 321,

When the media file can no longer be played through the currently set media file by receiving the current playback position value of VideoView or MidiaPlayer in seconds so that the newly downloaded portion can be periodically played through the buffer management module 322, Efficient wireless network streaming relay engine system using the media buffer control, characterized in that to update the playback position back to the corresponding playback position.
The method of claim 9, wherein the member device 300,

Media request and stream data is transmitted to the relay device 200 so that each member device 300 may periodically perform a buffer checking and file downloading process after the media playback starts. By controlling buffering, it reduces media streaming that is not required for current media playback to reduce network usage and network congestion, and prevents excessive network resource contention and deterioration of bandwidth fairness among member devices in the network. An efficient wireless network streaming relay engine system using media buffer control.