KR20160084216A - System for cloud streaming service, method of cloud streaming service using service quality control and apparatus for the same - Google Patents

Abstract

Disclosed are a system for a cloud streaming service, a method for a cloud streaming service using control of quality of a service, and an apparatus for the method. A cloud streaming server determines whether a decrease in quality of a result screen of an application is required based on the amount of load generated when a cloud streaming service is performed. When the decrease in the quality is determined to be required, the cloud streaming server may generate a decreased service screen by decreasing quality of a service corresponding to the result screen of the application so that the amount of load decreases, may perform a streaming pipeline procedure of capturing, encoding, and sending the decreased service screen, and then may provide the cloud streaming service to a user terminal. Furthermore, when quality of a service is controlled for stability of a system, the quality of the service is appropriately controlled based on features of a service screen, thereby minimizing an influence on the quality of the service screen.

Description

TECHNICAL FIELD [0001] The present invention relates to a cloud streaming service system, a cloud streaming service system, a cloud streaming service method using the service quality control,

The present invention relates to a cloud streaming service method and a technology for controlling the quality of a cloud streaming service system. More particularly, the present invention relates to a cloud streaming service method and a cloud streaming service method, A cloud streaming service system capable of smoothly providing a service, a cloud streaming service method using a service quality control, and an apparatus therefor.

Recently, due to the development of the Internet, the speed of communication using a personal mobile communication device has been dramatically improved. Based on this, an Internet environment such as downloading and uploading a large amount of data through a remote computer connection or locally logging into a remote computer . In addition, as a variety of applications have been developed for mobile communication terminals such as smart phones, many virtualization technologies have been proposed for driving applications requiring high performance in relatively low performance user terminals. Among them, the application is driven on the server, the driving screen is compressed through video encoding and transmitted to the client, and the client reproduces the transmitted video to generate a screen virtualization Cloud streaming service is becoming popular.

Because the cloud streaming service processes the service using only the limited resources provided in the system, the system load may be limited due to excessive requests. Accordingly, there is an urgent need for a technique for providing a free space in the system load by adjusting the quality of service provided to clients without fluctuating resources of the system.

Korean Patent Laid-Open No. 10-2014-0134117, published on Dec. 10, 2013 (name: a system and method for operating a screen virtualization-based application)

An object of the present invention is to provide a seamless cloud streaming service by improving the stability of the system through control of the quality of service in a system load situation during execution of the cloud streaming service.

It is also an object of the present invention to adjust the service quality so as to minimize the influence on the service screen quality by appropriately adjusting the service quality based on the characteristics of the service screen when adjusting the service quality for system stability.

According to an aspect of the present invention, there is provided a cloud streaming server comprising: a quality adjustment determining unit that determines whether an application result screen needs to be downgraded based on a load occurring when a cloud streaming service is performed; A quality control unit for generating a downlink service screen by lowering a service quality corresponding to the application result screen so that the load is reduced when it is determined that the quality downlink is required; And a controller for providing the cloud streaming service to a user terminal by performing a streaming pipeline procedure of capturing, encoding, and sending for the downlink service screen.

At this time, the quality control unit may lower the service quality of at least one of the image quality and the frame rate based on the screen change degree of the application result screen.

In this case, the quality control unit preferentially considers the downwardness of the image quality when the screen change degree is equal to or greater than a preset reference change degree, and preferentially considers the downwardness of the frame rate when the screen change degree is less than the predetermined reference change degree. Thereby lowering the service quality.

At this time, the quality adjustment determining unit may determine that the quality downward is necessary when the load amount deviates from the predetermined stable load range.

At this time, the quality control unit may lower the quality of service corresponding to at least one service quality combination by adjusting the image quality and the frame rate, respectively.

At this time, the quality control unit may lower the quality of service corresponding to a combination of quality of service that can reduce the load so that the load among the at least one quality of service combination corresponds to the predetermined stable load range.

At this time, the screen change degree can be calculated using the change between frames of the application result screen.

At this time, the quality control section can restore the service quality to the original state when the load amount corresponds to the predetermined stable load range.

According to another aspect of the present invention, there is provided a cloud streaming service method using service quality control, comprising: determining whether a quality down of an application result screen is required based on a load occurring when a cloud streaming service is performed; Generating a downlink service screen by lowering a service quality corresponding to the application result screen so that the load is reduced when it is determined that the quality downlink is required; And providing the cloud streaming service to a user terminal by performing a streaming pipeline procedure of capturing, encoding, and sending for the downlink service screen.

At this time, the generating step may lower the service quality of at least one of the picture quality and the frame rate based on the screen change degree of the application result screen.

In this case, the generation step may preferentially consider the downwardness of the image quality when the screen change degree is equal to or greater than a predetermined reference change degree, and preferentially downward the frame rate when the screen change degree is less than the predetermined reference change degree The quality of service can be reduced.

At this time, the determining step can determine that the quality downward is necessary when the load amount deviates from the predetermined stable load range.

In this case, the generating step may adjust the image quality and the frame rate, respectively, to lower the service quality in accordance with the combined at least one service quality combination.

At this time, the generating step may lower the quality of service corresponding to a combination of quality of service that can reduce the load so that the load among the at least one quality of service combination corresponds to the predetermined stable load range.

At this time, the screen change degree can be calculated using the change between frames of the application result screen.

At this time, the generating step may restore the quality of service if the load corresponds to the predetermined stable load range.

As another means for solving the problem of the present invention, there is provided a computer program stored in a medium for executing the above-described method.

In addition, the cloud streaming service system according to the present invention determines whether or not the application result screen needs to be downgraded based on the load amount generated when the cloud streaming service is performed, and when it is determined that the quality downward is required, A cloud streaming server for providing the cloud streaming service to a user terminal by generating a downlink service screen by downgrading the service quality corresponding to the application result screen, performing a streaming pipeline process of capturing, encoding, and sending the downlink service screen, ; And a terminal receiving an application execution result screen corresponding to the cloud streaming service from the cloud streaming server.

According to the present invention, it is possible to provide a seamless cloud streaming service by improving the stability of the system by adjusting the quality of service in the system load state during the execution of the cloud streaming service.

In addition, the present invention can adjust the service quality for system stability so as to minimize the influence on the quality of the service screen by appropriately adjusting the service quality based on the characteristics of the service screen.

1 is a diagram illustrating a cloud streaming service system according to an embodiment of the present invention.
2 is a block diagram showing the cloud streaming server shown in FIG.
3 is a diagram illustrating a service quality combination according to an embodiment of the present invention.
4 is a flowchart illustrating a cloud streaming service method using service quality control according to an embodiment of the present invention.
5 is a detailed flowchart illustrating a method of providing a cloud streaming service using a service quality control according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary meanings and the inventor is not limited to the concept of terminology for describing his or her invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible. Also, the terms first, second, etc. are used for describing various components and are used only for the purpose of distinguishing one component from another component, and are not used to define the components.

1 is a diagram illustrating a cloud streaming service system according to an embodiment of the present invention.

1, a cloud streaming service system according to an exemplary embodiment of the present invention includes a cloud streaming server 110, terminal devices 120-1 to 120-N, a web application server 130, Network 140. < / RTI >

The cloud streaming server 110 determines whether the application result screen is downgraded based on the load that occurs when the cloud streaming service is performed. At this time, if the load deviates from the predetermined stable load range, it can be determined that the quality downward is necessary.

In addition, when it is determined that the quality down is required, the cloud streaming server 110 generates a down service screen by downgrading the quality corresponding to the application result screen such that the load decreases. At this time, the service quality of at least one of the picture quality and the frame rate can be lowered based on the screen change degree of the application result screen. In this case, when the screen change degree is equal to or greater than the predetermined reference change degree, the downwardness of the picture quality is preferentially taken into consideration, and when the screen change degree is less than the predetermined reference change degree, the downwardness of the frame rate is preferentially considered, . At this time, the quality of service and the frame rate may be respectively adjusted to lower the service quality in accordance with at least one combination of the service quality. At this time, the service quality may be lowered corresponding to the combination of the service quality that can reduce the load so that the load amount among the at least one service quality combination corresponds to the predetermined stable load range. At this time, the screen change degree can be calculated using the inter-frame change of the application result screen. At this time, if the load corresponds to the predetermined stable load range, the service quality can be restored to its original state.

In addition, the cloud streaming server 110 performs a streaming pipeline process of capturing, encoding, and sending a downlink service screen to provide a cloud streaming service to the terminal devices 120-1, ..., 120-N .

The terminal devices 120-1 to 120-N receive an application execution result screen corresponding to the cloud streaming service from the cloud streaming server 110 and provide them to the user.

Each of the terminal devices 120-1 to 120-N is connected to a communication network and is capable of executing applications on the basis of a cloud computing system. The terminal devices 120-1 to 120-N are not limited to mobile communication terminals, , A wired terminal, a fixed terminal, and an IP (Internet Protocol) terminal. Each of the terminal devices 120-1 to 120-N may be a mobile phone, a portable multimedia player (PMP), a mobile Internet device (MID), a smart phone, a desktop, A mobile terminal having various mobile communication specifications such as a tablet PC, a notebook computer, a net book, a personal digital assistant (PDA), a smart TV, have.

The web application server 130 is a server that receives and processes a request from the terminal devices 120-1 to 120-N. Instead of processing all the requests received from the terminal devices 120-1 to 120-N in the web application server 130, the functions of the web application server 130 are structurally separated and processed through web containers The more the service requests from the terminal devices 120-1,..., 120-N are, the more effective the service using the web application server 130 can be. For example, WEB LOGIC of BEA, Web Spere of IBM, JEUS of T-max, Tomcat, and Jboss of RedHot may correspond to the web application server 130.

The network 140 provides a path for transferring data between the cloud streaming server 110 and the terminal devices 120-1 to 120-N, . For example, the network 140 may be a wired or wireless local area network that provides communication of various information devices within a limited area, a mobile communication network that provides communication between mobile objects and mobile objects outside the mobile object, Or a wired / wireless communication network, or a combination of two or more. Meanwhile, the transmission standard of the network 140 is not limited to the existing transmission standard, and may include all transmission standard to be developed in the future. The network used between the cloud streaming server 110 and the terminal devices 120-1 to 120-N in FIG. 1 is a terminal device 120-1 to 120-N, And may be the same or different from the network used for mutual use.

2 is a block diagram showing the cloud streaming server shown in FIG.

Referring to FIG. 2, the cloud streaming server 110 shown in FIG. 1 includes a communication unit 210, a quality adjustment determination unit 220, a quality adjustment unit 230, a control unit 240, and a storage unit 250 do.

The communication unit 210 transmits and receives information related to a plurality of terminals through a communication network such as the network shown in FIG. In particular, the communication unit 210 according to the embodiment of the present invention receives a request for the cloud streaming service from the terminal and provides an application execution result screen corresponding to the cloud streaming service requested by the terminal to the terminal.

The quality adjustment determination unit 220 determines whether a quality down of the application result screen is required based on the load amount generated when the cloud streaming service is performed.

Since the cloud streaming service frequently provides services to a plurality of users at the same time, a system load may be increased depending on the number of users connected at the same time. Also, depending on the type of the requested service, the load generated when the application result screen corresponding to the service is served may be different from each other. In this way, when the amount of load that can be processed by the system reaches the limit based on the load that can be generated variously during the execution of the cloud streaming service, the quality of the service may be adjusted. That is, the quality of service provided to the users' terminals is lowered to provide a service, thereby reducing the amount of load that is different from the limit.

Accordingly, it is possible to determine whether the quality of the application result screen, that is, the quality of the service, needs to be decreased according to the load of the cloud streaming service system.

 At this time, if the load deviates from the predetermined stable load range, it can be determined that the quality downward is necessary. For example, assuming that there is no load on the system at all, it is possible to set the stable load range from the load '0' to the specific load N smaller than the system's limit load. If the load on the system is greater than N, it may be determined that the quality of the application result screen needs to be reduced to reduce the load to N or less.

If it is determined that the downlink quality is required, the quality controller 230 downsizes the service quality corresponding to the application result screen so as to reduce the load, thereby generating the downlink service screen. The load of the system can be reduced by providing a downlink service screen in which the service quality of the application result screen corresponding to the cloud streaming service is lowered when the load of the system is close to the limit so that the quality of the cloud streaming service is required to be lowered. For example, an application result screen may be generated as a moving picture or an image, and an application result screen having various characteristics such as its size, resolution, image quality, or frame rate may be generated according to the type of a service requested by the user . By creating and servicing the downlink service screen with the downward service quality based on the characteristics of the application result screen generated as described above, the load can be reduced more than when the application result screen is served.

At this time, the service quality of at least one of the picture quality and the frame rate can be lowered based on the screen change degree of the application result screen. The application result screen may be capable of adjusting the service quality according to the characteristics of the application corresponding to the user request. At this time, the degree of screen change may also be one of the characteristics of the application such that there are many and few screen movements. That is, the application result screen can be classified according to whether it is dynamic, varied, static, or not.

At this time, it is possible to provide a better service result screen than to decrease the load by collectively lowering the service quality by determining the downward quality of the picture quality or the frame rate based on the screen change degree. For example, in the case of a dynamic application with many screen changes, the quality of service provided to the user can be significantly lowered at a low frame rate. Accordingly, in the case of such a dynamic application, the service quality of a better quality can be provided to the user by reducing the load by preferentially considering the lowering of the picture quality and resolution than the frame rate. Conversely, in the case of a static application, there is little change between frames, so even if the frame rate is low, the service quality may not be significantly affected. Accordingly, in such a case, it is possible to determine the downward direction of the service quality in a direction of lowering the frame rate while maintaining the image quality.

In this case, when the screen change degree is equal to or greater than the predetermined reference change degree, the downwardness of the picture quality is preferentially taken into consideration, and when the screen change degree is less than the predetermined reference change degree, the downwardness of the frame rate is preferentially considered, . For example, an application result screen having a screen change degree equal to or greater than a predetermined reference change degree may be determined as a dynamic screen, and the service quality may be lowered by using a method of lowering the image quality than a frame rate. In addition, the application result screen in which the screen change degree is less than the predetermined reference change degree can be determined as a static screen, and the service quality can be lowered by using a method of lowering the frame rate than the image quality.

At this time, the quality of service and the frame rate may be respectively adjusted to lower the service quality in accordance with at least one combination of the service quality. At this time, the combination can be generated in steps of lowering the picture quality and the frame rate. For example, it can be assumed that the image quality can be adjusted in three levels of good, normal, and bad, and that the frame rate can be adjusted to 7, 15, and 30 frames per second. In this case, when the service quality is lowered in consideration of the image quality, the service quality may be reduced corresponding to the combination of the normal image quality, the frame rate of 15 frames or the frame rate of 30 frames.

At this time, it is possible to calculate the reduced load when the service quality is lowered by using at least one service quality combination.

By reducing the quality of service using the pre-calculated reduced load information for each service quality combination, it is possible to minimize the delay caused by quality down during the cloud streaming service.

Also, when the above setting is not made in advance, the load amount to be reduced upon processing of the application result screen is checked, and the service quality can be reduced by calculating the combination of the service quality corresponding to the load to be reduced by detecting the screen change degree have.

At this time, the service quality may be lowered corresponding to the combination of the service quality that can reduce the load so that the load amount among the at least one service quality combination corresponds to the predetermined stable load range. For example, if the load is to be reduced by an A value so that the load of the system corresponds to a predetermined stable load range, a quality of service combination having a load amount that can be reduced among at least one of the service quality combinations is A . If there are a plurality of service quality combinations having a value equal to or greater than the A value, the service quality can be reduced using the service quality combination that can be reduced to a value closest to the A value so that the downwardness of the screen quality provided to the user can be minimized .

At this time, the screen change degree can be calculated using the inter-frame change of the application result screen. For example, when the encoding is performed, since the difference between the entire frame of the application result screen and the previous frame is checked, the inter-frame variation can be calculated.

At this time, if the load corresponds to the predetermined stable load range, the service quality can be restored to its original state. If the load of the system is within the predetermined stable load range, it is possible to provide the stable service to the user even if the service quality is not downgraded, so that the downward service quality can be restored.

The control unit 240 performs a streaming pipeline process of capturing, encoding, and sending a downlink service screen to provide a cloud streaming service to the user terminal.

In addition, if the load of the system is not high enough to process the application result screen, a streaming pipeline process of capturing, encoding, and sending the application result screen may be performed to provide a cloud streaming service.

The storage unit 250 stores various information generated in the cloud streaming service process according to the embodiment of the present invention as described above.

According to an embodiment, the storage unit 250 may be configured independently of the cloud streaming server 110 to support a function for the cloud streaming service. At this time, the storage unit 250 may operate as a separate mass storage and may include a control function for performing operations.

In addition, the cloud streaming server 110 configured as described above may be implemented as one or more servers.

On the other hand, the cloud streaming server 110 can store information in the memory on which the memory is mounted. In one implementation, the memory is a computer-readable medium. In one implementation, the memory may be a volatile memory unit, and in other embodiments, the memory may be a non-volatile memory unit. In one implementation, the storage device is a computer-readable medium. In various different implementations, the storage device may include, for example, a hard disk device, an optical disk device, or any other mass storage device.

3 is a diagram illustrating a service quality combination according to an embodiment of the present invention.

3, a service quality combination according to an exemplary embodiment of the present invention may be generated in various cases where quality and frame rate are adjusted as shown in FIG. 3, You can pre-calculate the possible load.

As shown in FIG. 3, the service quality combination is generated and stored in the form of a table in the cloud streaming service system, and the application result screen is used to lower the service quality, thereby minimizing the delay caused by executing the process according to the downward quality of service . For example, when processing a dynamic application result screen in which a screen change degree is equal to or greater than a predetermined reference change degree according to a user's request, if the load of the system is larger than the predetermined stable load range by B value, The downlink service screen can be generated by lowering the service quality of the application result screen in accordance with the combination of the service quality corresponding to the service quality. That is, since it is a dynamic application having a large screen change degree, it is possible to generate a downlink service screen by lowering the image quality than the frame rate and selecting case 2 suitable for the required load reduction amount.

If both the case 1 and the case 2 are suitable quality-of-service combinations for the load to be reduced, a downlink service screen can be generated by selecting B having a high frame rate in consideration of a dynamic application.

4 is a flowchart illustrating a cloud streaming service method using service quality control according to an embodiment of the present invention.

Referring to FIG. 4, a cloud streaming service method using service quality control according to an exemplary embodiment of the present invention determines whether the application result screen needs to be downgraded based on a load generated when a cloud streaming service is performed (S410).

Since the cloud streaming service frequently provides services to a plurality of users at the same time, a system load may be increased depending on the number of users connected at the same time. Also, depending on the type of the requested service, the load generated when the application result screen corresponding to the service is served may be different from each other. In this way, when the amount of load that can be processed by the system reaches the limit based on the load that can be generated variously during the execution of the cloud streaming service, the quality of the service may be adjusted. That is, the quality of service provided to the users' terminals is lowered to provide a service, thereby reducing the amount of load that is different from the limit.

Accordingly, it is possible to determine whether the quality of the application result screen, that is, the quality of the service, needs to be decreased according to the load of the cloud streaming service system.

 At this time, if the load deviates from the predetermined stable load range, it can be determined that the quality downward is necessary. For example, assuming that there is no load on the system at all, it is possible to set the stable load range from the load '0' to the specific load N smaller than the system's limit load. If the load on the system is greater than N, it may be determined that the quality of the application result screen needs to be reduced to reduce the load to N or less.

Also, in the cloud streaming service method using the service quality control according to an embodiment of the present invention, when it is determined that the quality downward is required, the downlink service screen is generated by decreasing the service quality corresponding to the application result screen so that the load decreases (S420). The load of the system can be reduced by providing a downlink service screen in which the service quality of the application result screen corresponding to the cloud streaming service is lowered when the load of the system is close to the limit so that the quality of the cloud streaming service is required to be lowered. For example, an application result screen may be generated as a moving picture or an image, and an application result screen having various characteristics such as its size, resolution, image quality, or frame rate may be generated according to the type of a service requested by the user . By creating and servicing the downlink service screen with the downward service quality based on the characteristics of the application result screen generated as described above, the load can be reduced more than when the application result screen is served.

At this time, the service quality of at least one of the picture quality and the frame rate can be lowered based on the screen change degree of the application result screen. The application result screen may be capable of adjusting the service quality according to the characteristics of the application corresponding to the user request. At this time, the degree of screen change may also be one of the characteristics of the application such that there are many and few screen movements. That is, the application result screen can be classified according to whether it is dynamic, varied, static, or not.

At this time, it is possible to provide a better service result screen than to decrease the load by collectively lowering the service quality by determining the downward quality of the picture quality or the frame rate based on the screen change degree. For example, in the case of a dynamic application with many screen changes, the quality of service provided to the user can be significantly lowered at a low frame rate. Accordingly, in the case of such a dynamic application, the service quality of a better quality can be provided to the user by reducing the load by preferentially considering the lowering of the picture quality and resolution than the frame rate. Conversely, in the case of a static application, there is little change between frames, so even if the frame rate is low, the service quality may not be significantly affected. Accordingly, in such a case, it is possible to determine the downward direction of the service quality in a direction of lowering the frame rate while maintaining the image quality.

In this case, when the screen change degree is equal to or greater than the predetermined reference change degree, the downwardness of the picture quality is preferentially taken into consideration, and when the screen change degree is less than the predetermined reference change degree, the downwardness of the frame rate is preferentially considered, . For example, an application result screen having a screen change degree equal to or greater than a predetermined reference change degree may be determined as a dynamic screen, and the service quality may be lowered by using a method of lowering the image quality than a frame rate. In addition, the application result screen in which the screen change degree is less than the predetermined reference change degree can be determined as a static screen, and the service quality can be lowered by using a method of lowering the frame rate than the image quality.

At this time, the quality of service and the frame rate may be respectively adjusted to lower the service quality in accordance with at least one combination of the service quality. At this time, the combination can be generated in steps of lowering the picture quality and the frame rate. For example, it can be assumed that the image quality can be adjusted in three levels of good, normal, and bad, and that the frame rate can be adjusted to 7, 15, and 30 frames per second. In this case, when the service quality is lowered in consideration of the image quality, the service quality may be reduced corresponding to the combination of the normal image quality, the frame rate of 15 frames or the frame rate of 30 frames.

At this time, it is possible to calculate the reduced load when the service quality is lowered by using at least one service quality combination.

By reducing the quality of service using the pre-calculated reduced load information for each service quality combination, it is possible to minimize the delay caused by quality down during the cloud streaming service.

Also, when the above setting is not made in advance, the load amount to be reduced upon processing of the application result screen is checked, and the service quality can be reduced by calculating the combination of the service quality corresponding to the load to be reduced by detecting the screen change degree have.

At this time, the service quality may be lowered corresponding to the combination of the service quality that can reduce the load so that the load amount among the at least one service quality combination corresponds to the predetermined stable load range. For example, if the load is to be reduced by an A value so that the load of the system corresponds to a predetermined stable load range, a quality of service combination having a load amount that can be reduced among at least one of the service quality combinations is A . If there are a plurality of service quality combinations having a value equal to or greater than the A value, the service quality can be reduced using the service quality combination that can be reduced to a value closest to the A value so that the downwardness of the screen quality provided to the user can be minimized .

At this time, the screen change degree can be calculated using the inter-frame change of the application result screen. For example, when the encoding is performed, since the difference between the entire frame of the application result screen and the previous frame is checked, the inter-frame variation can be calculated.

At this time, if the load corresponds to the predetermined stable load range, the service quality can be restored to its original state. If the load of the system is within the predetermined stable load range, it is possible to provide the stable service to the user even if the service quality is not downgraded, so that the downward service quality can be restored.

In addition, a cloud streaming service method using service quality control according to an embodiment of the present invention provides a cloud streaming service to a user terminal by performing a streaming pipeline procedure of capturing, encoding, and sending for a downlink service screen (S430) .

In addition, if the load of the system is not high enough to process the application result screen, a streaming pipeline process of capturing, encoding, and sending the application result screen may be performed to provide a cloud streaming service.

In addition, although not shown in FIG. 4, the cloud streaming service method using service quality control according to an embodiment of the present invention transmits / receives information related to a plurality of terminals through a communication network such as the network shown in FIG. In particular, the communication unit according to the embodiment of the present invention receives a request for the cloud streaming service from the terminal and provides an application execution result screen corresponding to the cloud streaming service requested by the terminal to the terminal.

In addition, although not shown in FIG. 4, the cloud streaming service method using service quality control according to an embodiment of the present invention stores various information generated in the cloud streaming service process according to an embodiment of the present invention.

At this time, the stored information may be configured independently of the cloud streaming server to support the function for the cloud streaming service. At this time, the storage unit in which information is stored may operate as a separate mass storage and may include control functions for performing operations.

5 is a detailed flowchart illustrating a method of providing a cloud streaming service using a service quality control according to an embodiment of the present invention.

Referring to FIG. 5, a cloud streaming service method using service quality control according to an embodiment of the present invention checks a load of a system to process an application result screen according to a user request (S510).

In addition, the cloud streaming service method using service quality control according to an embodiment of the present invention determines whether the load of the system is included in a predetermined stable load range (S515).

As a result of the determination in step S515, if it is not included in the predetermined stable load range, the screen change degree of the application result screen is calculated (S520). At this time, the screen change degree can be calculated using the inter-frame change of the application result screen.

In addition, the cloud streaming service method using service quality control according to an exemplary embodiment of the present invention determines whether the screen change degree of the application result screen is equal to or greater than a preset reference change degree (S525).

As a result of the determination in step S525, if the preset reference change is greater than the predetermined reference change, the service quality combination is preferentially selected in step S530.

As a result of the determination in step S525, if the preset reference change is less than the predetermined reference change, the service quality combination is preferentially selected considering the downwardness of the frame rate (S540).

In addition, in the cloud streaming service method using the service quality control according to an embodiment of the present invention, the service quality of the application result screen is lowered in accordance with the selected service quality combination in step S550.

In addition, the cloud streaming service method using service quality control according to an embodiment of the present invention performs a streaming pipeline procedure of capturing, encoding, and sending a downlink service screen (S560).

If the result of the determination in step S515 is included in the predetermined stable load range, a streaming pipeline process of capturing, encoding, and sending the application result screen is performed (S570).

Stream streaming service may be provided to the user terminal by performing a streaming pipeline procedure corresponding to capture, encoding and sending as in steps S560 and S570.

The cloud streaming service method using the service quality control according to the present invention can be implemented in the form of a program command that can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Includes all types of hardware devices that are specially configured to store and execute magneto-optical media and program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like. Such a hardware device may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

As described above, the cloud streaming service system according to the present invention, the cloud streaming service method using the service quality control, and the apparatus therefor are not limited to the configuration and method of the embodiments described above, The examples may be constructed by selectively combining all or a part of each embodiment so that various modifications can be made.

According to the present invention, it is determined whether the application result screen needs to be downgraded based on the load amount generated when the cloud streaming service is performed. If it is determined that the quality downward is required, the service quality corresponding to the application result screen is lowered To generate a downlink service screen, and to perform a streaming pipeline process of capturing, encoding, and sending the downlink service screen, thereby providing a cloud streaming service to the user terminal. Furthermore, the quality of service can be improved by adjusting the quality of service in a system load situation, thereby saving the cost of adding resources or improving performance of the system.

110: Cloud streaming servers 120-1 to 120-N:
130: Web application server 140: Network
210: communication unit 220: quality control decision unit
230 quality control unit 240 control unit
250:

Claims (18)

A quality adjustment determining unit that determines whether the application result screen needs to be downgraded based on a load amount generated when the cloud streaming service is performed;
A quality control unit for generating a downlink service screen by lowering a service quality corresponding to the application result screen so that the load is reduced when it is determined that the quality downlink is required; And
A controller for providing the cloud streaming service to a user terminal by performing a streaming pipeline procedure of capturing, encoding and sending on the downlink service screen,
Wherein the server comprises: The method according to claim 1,
The quality control unit
Wherein the service quality of the at least one of the image quality and the frame rate is lowered based on the degree of screen change of the application result screen. The method of claim 2,
The quality control unit
The downward direction of the image quality is preferentially considered when the screen change degree is equal to or greater than a predetermined reference change degree, and when the screen change degree is less than the predetermined reference change degree, the downwardness of the frame rate is preferentially considered, Wherein the server is a cloud server. The method of claim 3,
The quality adjustment determination unit
And determines that the quality downward is required when the load amount deviates from a predetermined stable load range. The method of claim 4,
The quality control unit
Wherein the service quality is lowered in accordance with at least one service quality combination in which the image quality and the frame rate are adjusted and combined, respectively. The method of claim 5,
The quality control unit
And downs the quality of service corresponding to a quality of service combination capable of reducing the load so that the load of the at least one quality of service combination corresponds to the predetermined stable load range. The method of claim 3,
The screen change
Wherein the calculation is performed using a change between frames of the application result screen. The method of claim 4,
The quality control unit
And restores the quality of service if the load corresponds to the preset stable load range. Determining whether the application result screen needs to be downgraded based on a load amount generated when the cloud streaming service is performed;
Generating a downlink service screen by lowering a service quality corresponding to the application result screen so that the load is reduced when it is determined that the quality downlink is required; And
Performing a streaming pipeline procedure of capturing, encoding, and sending the downlink service screen to provide the cloud streaming service to a user terminal
The method of claim 1, further comprising: The method of claim 9,
The generating step
Wherein the service quality of at least one of the image quality and the frame rate is lowered based on the degree of screen change of the application result screen. The method of claim 10,
The generating step
The downward direction of the image quality is preferentially considered when the screen change degree is equal to or greater than a predetermined reference change degree, and when the screen change degree is less than the predetermined reference change degree, the downwardness of the frame rate is preferentially considered, Wherein the quality of service is determined based on the quality of service. 14. The method of claim 13,
The step of determining
And determines that the downlink quality is required when the load is out of a predetermined stable load range. The method of claim 12,
The generating step
Wherein the service quality is lowered in accordance with at least one service quality combination in which the image quality and the frame rate are adjusted and combined, respectively. 14. The method of claim 13,
The generating step
Characterized in that the service quality is lowered corresponding to a quality of service combination capable of decreasing the load amount so that the load of the at least one service quality combination corresponds to the predetermined stable load range. Service method. The method of claim 11,
The screen change
Wherein the application is calculated using inter-frame variation of the application result screen. The method of claim 12,
The generating step
And restoring the quality of service to the original quality if the load corresponds to the predetermined stable load range. A computer program stored on a medium for carrying out the method as claimed in any one of claims 9 to 16. Determining whether a quality down of the application result screen is required based on a load amount generated when the cloud streaming service is performed and decreasing the service quality corresponding to the application result screen so that the load is decreased when it is determined that the quality down is necessary A cloud streaming server for generating a downlink service screen and providing the cloud streaming service to a user terminal by performing a streaming pipeline procedure of capturing, encoding, and sending for the downlink service screen; And
And a terminal for receiving an application execution result screen corresponding to the cloud streaming service from the cloud streaming server,
And a server for providing the cloud streaming service.

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