KR20210105161A - Server, method and computer program for managing quality of video streaming service - Google Patents

Abstract

The present invention relates to a quality management server, method, and computer program for managing quality of a video streaming service. The quality management server that manages the quality of the video streaming service includes: a collection unit that collects service information including at least one user terminal information, network information, traffic information, and image information from a plurality of user terminals receiving a video streaming service from an image providing server; an image quality evaluation unit for deriving an image quality index of images reproduced in the plurality of user terminals based on the collected service information; and a service management unit that manages the video streaming service provided to the plurality of user terminals by adjusting a video providing environment based on the derived video quality index.

Description

Quality management server, method and computer program for managing the quality of video streaming service {SERVER, METHOD AND COMPUTER PROGRAM FOR MANAGING QUALITY OF VIDEO STREAMING SERVICE}

The present invention relates to a quality management server, method and computer program for managing the quality of a video streaming service.

Recently, video traffic usage of wireless networks using mobile devices such as smartphones and tablet PCs is increasing. However, due to the nature of a wireless network with limited resources and a high quality change, there is a high possibility that a problem such as playback interruption occurs when high-quality video is played. If playback is interrupted from the point of view of a video viewing user, the quality of experience for the wireless network is greatly reduced.

Therefore, in order to provide a high user experience, a method for continuously monitoring the video streaming service and maintaining the quality above a certain level is required. For this purpose, existing methods mainly manage quality from the point of view of individual users.

However, existing methods of managing quality in units of individual users can only optimize the quality of services provided to individual users under a given network situation, but have limitations in managing the resources themselves in units of the entire network or server.

In addition, there is a problem in that it is difficult to optimize the initial reproduction quality according to the quality control method for each user. In the case of conventional adaptive bitrate streaming (ABR), a method of starting playback with a low-quality video and improving it to an optimal quality is generally used. .

Japanese Laid-Open Patent Publication No. 2015-192239 (published on Nov. 2, 2015)

The present invention is to solve the problems of the prior art described above, collect service information from a plurality of user terminals receiving a video streaming service, derive an image quality index of an image reproduced in a user terminal, and based on the image quality index Therefore, we want to manage the video streaming service by adjusting the video providing environment.

An object of the present invention is to provide a quality management server, method, and computer program that can efficiently manage the quality of video streaming services by analyzing monitoring results in various ways.

An object of the present invention is to provide a quality control server, method, and computer program that can predict and actively deal with the deterioration of image quality.

An object of the present invention is to provide a quality control server, method, and computer program capable of optimizing the initial quality of an image.

However, the technical problems to be achieved by the present embodiment are not limited to the technical problems described above, and other technical problems may exist.

As a means for achieving the above-described technical problem, an embodiment of the present invention provides a quality management server for managing the quality of a video streaming service. A collection unit for collecting service information including one or more of terminal information, network information, traffic information, and image information, and an image for deriving an image quality index of images reproduced in the plurality of user terminals based on the collected service information It may include a quality evaluation unit and a service management unit for managing the video streaming service provided to the plurality of user terminals by adjusting the image providing environment based on the derived image quality index.

In an embodiment, the service manager may adjust the image providing environment based on a result of analyzing the derived image quality index in units of user terminals, streaming services, servers, or cells.

In an embodiment, the image information includes resolution, reproduction stability, and delay time of images reproduced in the plurality of user terminals, and the image quality index is a reproduction quality index of images reproduced in the plurality of user terminals. and the image quality evaluator may derive the reproduction quality index based on the image information.

In an embodiment, the image quality index may include a buffer amount of the plurality of user terminals, and the service manager may adjust the quality of an image reproduced in the user terminal based on the buffer amount.

In an embodiment, the service manager may adjust the resource allocation for each user terminal by analyzing the derived image quality index for each user terminal.

In an embodiment, the service management unit may analyze the derived image quality index in units of streaming services to adjust the resource allocation priority for user terminals receiving each streaming service.

In an embodiment, the service manager may analyze the derived image quality index on a server-by-server basis and change the image providing server accessed by each user terminal to another server.

In an embodiment, the service management unit analyzes the derived image quality index on a cell-by-cell basis and adjusts the quality of an image provided by a user terminal accessing each cell, or a resource for a user terminal accessing each cell. It is possible to adjust the quota or move a part of the user terminal accessing each cell to a neighboring cell.

In an embodiment, the service management unit may analyze the derived image quality index in units of cells and servers to determine the initial quality of an image for a user terminal that newly requests image reproduction from the image providing server.

Another embodiment of the present invention provides a quality management method for managing the quality of a video streaming service,

Collecting service information including at least one of user terminal information, network information, traffic information, and image information from a plurality of user terminals receiving a video streaming service from an image providing server, based on the collected service information Deriving the image quality index of the image reproduced in the plurality of user terminals and managing the video streaming service provided by the plurality of user terminals by adjusting the image providing environment based on the derived image quality index can

Another embodiment of the present invention is a computer program stored in a medium including a sequence of instructions for managing the quality of a video streaming service, when the computer program is executed by a computing device, the video streaming service is provided from an image providing server. Service information including at least one of user terminal information, network information, traffic information, and image information is collected from a plurality of user terminals being provided, and the image reproduced in the plurality of user terminals is collected based on the collected service information. It may include a sequence of instructions for managing the video streaming service provided by the plurality of user terminals by deriving an image quality index and adjusting an image providing environment based on the derived image quality index.

The above-described problem solving means are merely exemplary, and should not be construed as limiting the present invention. In addition to the exemplary embodiments described above, there may be additional embodiments described in the drawings and detailed description.

According to any one of the above-described problem solving means of the present invention, the present invention collects service information from a plurality of user terminals receiving a video streaming service, derives an image quality index, and provides an image providing environment based on the image quality index. By adjusting, you can manage the video streaming service.

Through this, it is possible to efficiently manage the quality of the video streaming service by analyzing the quality monitoring results in an integrated way.

In addition, it is possible to predict the possibility that the quality of the image will deteriorate and to actively cope with the quality change.

In addition, it is possible to prevent the user receiving the video streaming service from deteriorating the perceived quality.

1 is a block diagram of a system for providing a video streaming service according to an embodiment of the present invention.
2 is a block diagram of a quality management server according to an embodiment of the present invention.
3 is a flowchart of a method for managing quality according to an embodiment of the present invention.
4 is an exemplary flowchart of a method for collecting service information according to an embodiment of the present invention.
5 is an exemplary flowchart of a method for adjusting the quality of an image according to an embodiment of the present invention.
6A and 6B are exemplary flowcharts of a method for adjusting resource allocation according to an embodiment of the present invention.
7 is an exemplary flowchart of a method for adjusting a resource allocation rank according to an embodiment of the present invention.
8 is an exemplary flowchart of a method of moving a cell accessed by a user terminal according to an embodiment of the present invention.
9A and 9B are exemplary flowcharts of a method for determining an initial quality of an image according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is "connected" with another part, this includes not only the case of being "directly connected" but also the case of being "electrically connected" with another element interposed therebetween. . Also, when a part "includes" a component, it means that other components may be further included, rather than excluding other components, unless otherwise stated, and one or more other features However, it is to be understood that the existence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded in advance.

In this specification, a "part" includes a unit realized by hardware, a unit realized by software, and a unit realized using both. In addition, one unit may be implemented using two or more hardware, and two or more units may be implemented by one hardware. Meanwhile, '~ unit' is not limited to software or hardware, and '~ unit' may be configured to be in an addressable storage medium or may be configured to reproduce one or more processors. Thus, as an example, '~' denotes components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays and variables. The functions provided in the components and '~ units' may be combined into a smaller number of components and '~ units' or further separated into additional components and '~ units'. In addition, components and '~ units' may be implemented to play one or more CPUs in a device or secure multimedia card.

The "network" referred to below means a connection structure in which information can be exchanged between each node, such as terminals and servers, and a local area network (LAN), a wide area network (WAN) , the Internet (WWW: World Wide Web), wired and wireless data networks, telephone networks, wired and wireless television networks, and the like. Examples of wireless data communication networks include 3G, 4G, 5G, 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE), World Interoperability for Microwave Access (WIMAX), Wi-Fi, Bluetooth communication, infrared communication, ultrasound Communication, Visible Light Communication (VLC), LiFi, etc. are included, but are not limited thereto.

Some of the operations or functions described as being performed by the terminal or device in the present specification may be instead performed by a server connected to the terminal or device. Similarly, some of the operations or functions described as being performed by the server may also be performed in a terminal or device connected to the server.

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

1 is a block diagram of a system for providing a video streaming service according to an embodiment of the present invention. Referring to FIG. 1 , the video streaming service providing system 100 may include a quality management server 110 , an image providing server 120 , and a plurality of user terminals 130 .

The video streaming service providing system 100 may provide, for example, a real-time video streaming service to a plurality of user terminals 130 .

The quality management server 110 , the image providing server 120 , and the plurality of user terminals 130 may transmit or receive data to each other through a network. For example, the image providing server 120 may transmit an image file to the plurality of user terminals 130 . For example, the quality management server 110 may transmit a command signal for adjusting the image providing environment of the plurality of user terminals 130 .

The image providing server 120 may provide content including an image. The image streaming service providing system 100 may include a plurality of image providing servers 120 , and may provide different content for each image providing server 120 .

The plurality of user terminals 130 may reproduce the received image using a display, a speaker, or the like. The image reproduction environment in each user terminal may be adjusted by the quality management server 110 .

2 is a block diagram of a quality management server according to an embodiment of the present invention. Referring to FIG. 2 , the quality management server 110 may include a collection unit 111 , an image quality evaluation unit 112 , and a service management unit 113 .

The quality management server 110 may manage the quality of the video streaming service. The quality management server 110 may monitor the quality of the video streaming service and analyze it in units of one user terminal or in multiple units including a plurality of user terminals.

The quality management server 110 may manage the quality by controlling the service in a small unit or a large unit depending on the situation, based on the analysis result. The quality management server 110 may predict a change in the quality of the video streaming service and actively manage the quality of the service based on the prediction.

Specifically, the collection unit 111 may collect service information from the plurality of user terminals 130 that are receiving the image streaming service from the image providing server 120 . The service information may include one or more of user terminal information, network information, traffic information, and image information.

The user terminal information may include, for example, information about a Device Model, Device ID (IMSI, MSISDN, etc.) of each user terminal, OS/OS Version, Player Name, and the like.

Network information, for example, Carrier Name, MNC, MCC, Network Type, Cell ID, CQI, RSRQ, Packet loss ratio, additionally connectable network status (5G, LTE, WiFi, etc.) It may include information about.

Traffic information may include, for example, UL/DL traffic information (bps), Target Remote Host RTT information (ms), Target Remote Host Jitter information (ms), Bandwidth/RTT/Jitter information of additionally accessible networks, etc. have.

Video information includes URL (manifest URL, content URL, etc.), Session ID, Codec information and Encoding Rate, Video Size, License Info (DRM), Startup Time, Total Duration, Buffered Duration, Current Position, Decoding Time (Max. & Avg .), quality change, Frame Drop information (timestamp, position, renderDelay, consecutiveDrop, etc.), buffering occurrence information (timestamp, duration, etc.), User Event (seek, pause, resume, etc.) .

The service information may further include custom information. The custom information may include, for example, information about User Identifier (identification factor for internal system without personal information issue), Device Location (Latitude, Longitude), and the like.

The image quality evaluation unit 112 may derive an image quality index of images reproduced by the plurality of user terminals 130 based on the collected service information.

The image quality index may include, for example, a reproduction quality index of images being reproduced by the plurality of user terminals 130 . The image quality evaluation unit 112 may derive a reproduction quality index based on the image information. The image information may include, for example, resolution, reproduction stability, and delay time of images reproduced by the plurality of user terminals 130 .

The image quality evaluator 112 may derive a reproduction quality index using Equation (1).

The QoE is a video reproduction quality index being played at the user terminal, R is biteureyi the image teuyigo, N _B is the number of stalling (stalling), L _B is the length of stalling, D will be an initial delay time can

In an embodiment, the plurality of user terminals 130 may transmit user terminal information to the quality management server 110 when the user terminals are powered on.

When the user terminal requests playback from the image providing server 120 , the user terminal may transmit network information, traffic information, and image information to the quality management server 110 . The quality management server 110 may periodically collect network information, traffic information, and image information.

The service manager 113 may manage the video streaming service provided to a plurality of user terminals by adjusting the video providing environment based on the derived video quality index.

The image quality index may further include, for example, buffer amounts of the plurality of user terminals 130 . The image quality evaluation unit 112 may derive the amount of buffers of the plurality of user terminals 130 in real time. The service manager 113 may adjust the quality of the image reproduced in the user terminal based on the buffer amount.

In an embodiment, the service manager 113 may pre-adjust the quality of the image before the quality degradation occurs based on the buffer amount. For example, the service management unit 113 determines the quality when the buffer amount (the amount of media packets stored in the buffer) is equal to or greater than the first preset standard and there is a high-quality video from the video providing server 120 . can be adjusted upwards. For example, the service management unit 113 may allocate additional resources or change the image providing server 120 when the buffer amount is decreasing but does not fall below the second preset criterion. For example, the service management unit 113 may immediately downgrade the quality when the buffer amount is less than or equal to the second preset reference.

The user experience of the video streaming service is greatly reduced when the playback is interrupted rather than when the resolution is lowered. Accordingly, when stable reproduction is difficult, the service management unit 113 may prevent reproduction interruption by lowering the quality of the image.

The user terminal may continuously reproduce the image without interruption by switching the image at a time point between when the low-quality image is received and the playback of the high-quality image stored in the buffer is completed.

The service management unit 113 may adjust the image providing environment based on the result of analyzing the derived image quality index in units of user terminals, streaming services, servers, or cells.

The service management unit 113 may analyze the derived image quality index in units of user terminals. Based on this, the service management unit 113 may adjust the resource allocation for each user terminal.

For example, when the quality of the radio signal is reduced or the image quality index of each user terminal is reduced due to lack of resources, the service manager 113 may additionally allocate resources to the corresponding user terminal.

The service management unit 113 may analyze the derived image quality index in units of streaming services. Based on this, the service management unit 113 may adjust the resource allocation priority for the user terminal receiving each streaming service.

For example, when the image quality index of the user terminal receiving the same streaming service decreases on average, the service management unit 113 may increase the resource allocation ranking for the corresponding streaming service. By raising the resource allocation rank, the resource allocation amount may be indirectly increased.

For example, when Allocation and Retention Priority (ARP) and 5G QoS Indentifier (5QI) are up-regulated, images can be transmitted stably compared to other user terminals and streaming services. In one embodiment, it is possible to adjust the resource allocation priority by dividing for each OTT operator.

The service management unit 113 may analyze the derived image quality index for each server. Based on this, the service management unit 113 may change the image providing server 120 to which each user terminal is connected to another server.

For example, when the image quality index of the user terminal accessing the same image providing server 120 decreases on average, the service management unit 113 may switch the corresponding image providing server 120 to another image providing server. . The service manager 113 may perform server switching by transmitting the address of another image providing server to be switched to the user terminal.

The service manager 113 may analyze the derived image quality index in units of cells. The service manager 113 may adjust the image providing environment based on the cell IDs of the plurality of user terminals 130 based on the result of the cell-by-cell analysis.

For example, the service manager 113 may adjust the quality of an image being provided to a user terminal connected to each cell. The service management unit 113 may adjust the resource allocation for the user terminal accessing each cell. The service management unit 113 may move a part of the user terminal accessing each cell to a neighboring cell.

For example, when the image quality index of a user terminal accessing the same cell decreases on average, the service manager 113 may move a part of the accessed user terminal to a neighboring cell by adjusting the handover offset of the corresponding cell. .

By adjusting the image providing environment on a cell-by-cell basis, there is an effect that resources can be managed at the network level. In addition, by moving a part of the user terminal to a neighboring cell, it is possible to prevent the user's quality of experience from being deteriorated.

The service management unit 113 may analyze the derived image quality index in units of cells and servers. Based on this, the service manager 113 may determine the initial quality of an image for a user terminal that newly requests image reproduction from the image providing server 120 .

For example, the service management unit 113 may analyze the image quality index in units of cells according to the location of the user terminal and the initial quality of the image for the user terminal based on the result of analyzing the image quality index in units of the image providing server. can be decided

3 is a flowchart of a method for managing quality according to an embodiment of the present invention. The method 300 for managing the quality of the video streaming service performed in the quality management server 110 shown in FIG. 3 is a step of time-series processing by the quality management server 110 according to the embodiment shown in FIG. include those Therefore, even if omitted below, it is also applied to the method of managing the quality of the video streaming service performed by the quality management server 110 according to the embodiment shown in FIG. 2 .

In step S310 , the quality management server 110 may collect service information from the plurality of user terminals 130 that are receiving the video streaming service from the video providing server 120 . The service information may include, for example, one or more of user terminal information, network information, traffic information, and image information.

In step S320 , the quality management server 110 may derive an image quality index of images reproduced in the plurality of user terminals 130 based on the collected service information.

In step S330, the quality management server 110 may manage the video streaming service provided to the plurality of user terminals 130 by adjusting the video providing environment based on the derived video quality index.

In the above description, steps S310 to S330 may be further divided into additional steps or combined into fewer steps according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be switched.

4 is an exemplary flow diagram of a method 400 for collecting service information in accordance with an embodiment of the present invention.

In step S401, the quality management server 110 may receive the user terminal information from the user terminal.

In step S402, the user terminal may request image reproduction from the image providing server 120 .

In step S403, the image providing server 120 may transmit information about the image to the user terminal.

In step S404, the image providing server 120 may transmit the image file to the user terminal.

In step S405, the quality management server 110 may receive network information, traffic information, and image information from the user terminal.

In the above description, steps S401 to S405 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be switched.

5 is an exemplary flow diagram of a method 500 for adjusting the quality of an image according to an embodiment of the present invention.

In step S501, the image providing server 120 may transmit a high-quality image to the user terminal.

In step S502, the quality management server 110 may monitor the user terminal.

In step S503, the quality management server 110 may detect a decrease in image quality in the user terminal.

In step S504 , the quality management server 110 may request the image providing server 120 to change the CDN content profile.

In step S505 , the quality management server 110 may receive a CDN content profile change response from the image providing server 120 .

In step S506, the quality management server 110 may transmit a playback setting change command to the user terminal.

In step S507, the image providing server 120 may transmit a low-quality image to the user terminal.

In step S508, the user terminal may change the playback image.

In the above description, steps S501 to S508 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be switched.

6A is an exemplary flow diagram of a method 600 of adjusting a resource quota in accordance with an embodiment of the present invention.

In step S601, the quality management server 110 may detect a decrease in image quality in the user terminal.

In step S602, the quality control server 110 may transmit a Guaranteed Bit Rate (GBR) generation or additional command (AAR) to a Policy Control Function (PCF).

In step S603, the PCF may transmit a GBR generation or addition command (AAR) to a user plane function (UPF).

In step S604, the UPF may generate or add GBR to the user terminal.

In step S605, the image providing server 120 may transmit the image file to the user terminal using the generated or added GBR.

In the above description, steps S601 to S605 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be switched.

6B is an exemplary flow diagram of a method 610 for adjusting a resource quota in accordance with an embodiment of the present invention.

In step S611, the quality management server 110 may detect a decrease in image quality in the user terminal.

In step S612, the quality control server 110 may transmit a parallel transmission command through Wi-Fi to a gateway.

In step S613, the image providing server 121 may transmit the image file to the gateway.

In step S614, the gateway may distribute the image file to the UPF.

In step S615, the user terminal may receive parallel image files from Wi-Fi and UPF.

In the above description, steps S611 to S615 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be switched.

7 is an exemplary flow diagram of a method 700 for adjusting a resource allocation rank in accordance with an embodiment of the present invention.

In step S701, the quality management server 110 may detect a decrease in image quality in the user terminal.

In step S702, the quality management server 110 may request an Allocation and Retention Priority (ARP) or 5G QoS Identifier (5QI) adjustment to a Session Management Function (SMF).

In step S703, the SMF may transmit a bearer attribute change command to the UPF.

In step S704, the video providing server 120 may transmit the video file to the user terminal through an ARP or 5QI up-tuned bearer.

In the above description, steps S701 to S704 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be switched.

8 is an exemplary flowchart of a method 800 for moving a cell accessed by a user terminal according to an embodiment of the present invention.

In step S801, the quality management server 110 may detect a large-scale degradation of image quality in cell A.

In step S802, the quality management server 110 may transmit information on cell A in which quality degradation has occurred and a down adjustment command of the handover offset of cell A to a central unit (CU)/element management system (EMS). have.

In step S803, the CU/EMS may down-tune the handover offset of cell A.

In step S804, cell A may transmit an update of the handover configuration to the user terminal.

In step S805, handover may be performed from cell A to cell B for the user terminal.

In the above description, steps S801 to S805 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be switched.

9A is an exemplary flow diagram of a method 900 for determining an initial quality of an image in accordance with an embodiment of the present invention.

In step S901, the user terminal may request image reproduction from the gnB (5G base station) and the quality management server 110 .

In step S902, the quality management server 110 may determine the average image quality in the corresponding gnB and select an optimal image quality.

In step S903, the quality management server 110 may request the image providing server 120 to play the video including the initial playback quality.

In step S904, the image providing server 120 may transmit an image having an optimal reproduction quality to the user terminal.

In the above description, steps S901 to S904 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be switched.

9B is an exemplary flowchart of a method 910 for determining an initial quality of an image according to an embodiment of the present invention.

In step S911, the user terminal may request image reproduction from the gnB (5G base station) and the quality management server 110 .

In step S912, the quality management server 110 may determine the average image quality for each server and select an optimal image quality.

In step S913 , the quality management server 110 may request playback including the initial playback quality to the image providing server 120 .

In step S914, the image providing server 120 may transmit an image having an optimal reproduction quality to the user terminal.

In the above description, steps S911 to S914 may be further divided into additional steps or combined into fewer steps, according to an embodiment of the present invention. In addition, some steps may be omitted if necessary, and the order between the steps may be switched.

The method for managing the quality of the video streaming service in the quality management server described through FIGS. 1 to 9 is also implemented in the form of a recording medium including a computer program stored in a medium executed by a computer or instructions executable by a computer. can be

Computer-readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. Also, computer-readable media may include computer storage media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data.

The description of the present invention described above is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

100: video streaming service providing system
110: quality control server
111: collection unit
112: image quality evaluation unit
113: service management department
120: video providing server
130: a plurality of user terminals

Claims (19)

In the quality management server for managing the quality of the video streaming service,
a collection unit for collecting service information including at least one of user terminal information, network information, traffic information, and image information from a plurality of user terminals receiving a video streaming service from an image providing server;
an image quality evaluation unit for deriving an image quality index of images reproduced in the plurality of user terminals based on the collected service information; and
A service management unit for managing the video streaming service provided to the plurality of user terminals by adjusting the video providing environment based on the derived video quality index
Which will include, a quality control server.
The method of claim 1,
The service management unit will adjust the image providing environment based on the result of analyzing the derived image quality index in units of each user terminal, each streaming service, each server, or each cell, the quality management server.
The method of claim 1,
The image information includes resolution, reproduction stability, and delay time of images reproduced in the plurality of user terminals,
The image quality index includes a reproduction quality index of the image being reproduced in the plurality of user terminals,
The image quality evaluation unit will derive the reproduction quality index based on the image information, the quality management server.
The method of claim 1,
The image quality index includes a buffer amount of the plurality of user terminals,
The service management unit will adjust the quality of the image reproduced in the user terminal based on the buffer amount, the quality management server.
3. The method of claim 2,
The service management unit analyzes the derived image quality index for each user terminal to adjust the resource allocation for each user terminal, the quality management server.
3. The method of claim 2,
The service management unit analyzes the derived image quality index in units of streaming services to adjust the resource allocation ranking for user terminals receiving each streaming service, the quality management server.
3. The method of claim 2,
The service management unit analyzes the derived image quality index on a server-by-server basis and changes the image providing server accessed by each user terminal to another server.
3. The method of claim 2,
The service management unit analyzes the derived image quality index on a cell-by-cell basis and adjusts the quality of an image provided by a user terminal accessing each cell, or adjusts a resource quota for a user terminal accessing each cell, A quality control server that moves a part of the user terminal connected to each cell to a neighboring cell.
3. The method of claim 2,
The service management unit analyzes the derived image quality index in units of cells and servers to determine the initial quality of an image for a user terminal that newly requests image reproduction from the image providing server.
In the quality management method for managing the quality of the video streaming service,
Collecting service information including at least one of user terminal information, network information, traffic information, and image information from a plurality of user terminals receiving a video streaming service from an image providing server;
deriving an image quality index of images reproduced in the plurality of user terminals based on the collected service information; and
Managing the video streaming service provided to the plurality of user terminals by adjusting the video providing environment based on the derived video quality index
Which comprises, a quality control method.
11. The method of claim 10,
The managing of the video streaming service is to adjust the video providing environment based on the result of analyzing the derived video quality index in units of each user terminal, each streaming service, each server, or each cell, the quality management method .
11. The method of claim 10,
The image information includes resolution, reproduction stability, and delay time of images reproduced in the plurality of user terminals,
The image quality index includes a reproduction quality index of the image being reproduced in the plurality of user terminals,
The step of deriving the image quality index is to derive the reproduction quality index on the basis of the image information, quality management method.
11. The method of claim 10,
The image quality index includes a buffer amount of the plurality of user terminals,
Further comprising the step of adjusting the quality of the image reproduced in the user terminal based on the buffer amount, the quality management method.
12. The method of claim 11,
Analyzing the derived image quality index in units of user terminals, the method further comprising the step of adjusting a resource allocation for each user terminal.
12. The method of claim 11,
Analyzing the derived image quality index for each streaming service, the method further comprising the step of adjusting the resource allocation ranking for the user terminal that is provided with each streaming service, the quality management method.
12. The method of claim 11,
The method further comprising the step of analyzing the derived image quality index on a server-by-server basis and changing the image providing server accessed by each user terminal to another server.
12. The method of claim 11,
By analyzing the derived image quality index on a cell-by-cell basis, the quality of the video provided by the user terminal accessing each cell is adjusted, the resource allocation amount for the user terminal accessing the cell is adjusted, or the The method further comprising the step of moving a part of the accessed user terminal to a neighboring cell, quality control method.
12. The method of claim 11,
The method further comprising the step of analyzing the derived image quality index in units of cells and servers to determine an initial quality of an image for a user terminal that newly requests image reproduction from the image providing server.
A computer program stored in a medium including a sequence of instructions for managing the quality of a video streaming service,
When the computer program is executed by a computing device,
Collecting service information including one or more of user terminal information, network information, traffic information, and image information from a plurality of user terminals receiving a video streaming service from an image providing server,
Derive an image quality index of the image reproduced in the plurality of user terminals based on the collected service information,
The computer program stored in the medium, comprising a sequence of instructions for managing the video streaming service provided to the plurality of user terminals by adjusting the video providing environment based on the derived image quality index.

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