KR100272592B1 - Multimedia service enhencing system - Google Patents

Abstract

The scalable system of multimedia services is to ensure the quality of service (QoS) between multimedia applications as well as within the multimedia applications in the state of dynamically changing network and local computer in general office environment. A quality of service (QoS) manager that adjusts, manages, or controls a quality of service (QoS) within the host of the system, and controls resources shared among multimedia applications according to the control of the quality of service (QoS) manager. It is composed of a plurality of service managers that manage or provide basic services required by the multimedia application program.

Description

Scalable system of multimedia service

The present invention relates to a multimedia service, and more particularly to an extended system of a multimedia service.

Recently, many multimedia applications that deal with multimedia data such as video, audio, and three-dimensional graphics have been developed.

Such multimedia applications include Internet phones, video conferencing systems, Video On Demand (VOD), tele-learning, geographic information systems, and virtual reality programs.

In such multimedia applications, each multimedia application program is developed independently.

Hereinafter, a multimedia service system according to the prior art will be described with reference to the accompanying drawings.

1 is a diagram illustrating a multimedia service system according to the prior art, wherein multimedia data is transmitted between a multimedia application program under control of a first control unit 11 and the first control unit 11 for transmitting and receiving control information between multimedia application programs. The multimedia application according to the control of the second control unit 21 and the second control unit 21 for transmitting and receiving control information between the first host 10 and the first host 10 including a first transmission and reception unit 12 for transmitting and receiving It consists of a second host 20 composed of a second transceiver 22 for transmitting and receiving multimedia data between programs.

2 is a diagram illustrating a general configuration of a three-layer Quality of Service (QoS) system according to the prior art.

The operation of the multimedia service system according to the related art configured as described above will be described in detail with reference to the accompanying drawings.

First, the first control unit 11 in the first host 10 transmits and receives control information between multimedia application programs.

The first transceiver 12 then transmits and receives multimedia data between the multimedia application programs under the control of the first controller 11.

Accordingly, the second control unit 21 in the second host 20 transmits and receives control information between the multimedia application programs.

Subsequently, the second transceiver 22 transmits and receives multimedia data between the multimedia application programs under the control of the second controller 21.

On the other hand, the Quality of Service (QoS) framework according to the prior art (QoS) framework (QoS) specification that specifies the requirements as a higher level parameter (QuoS) specification (Specific Requirements), and the quality of service (QoS) specification Quality of Service (QoS) Mapping and Quality of Service Negotiation, which translates the quality of service (QoS) specified by the specification into resource requirements such as CPU, memory, and network bandwidth. A setup phase such as resource allocation, an operational phase of scheduling various shared resources to satisfy the allocation of resources, monitoring the status of the allocated resources and providing quality of service (QoS) It consists of a Quality of Service (QoS) Inforcement, which consists of a Management Phase that renegotiates the service, and negotiates Quality of Service (QoS) with connected parties. Following the system outlined Figure are as shown in Fig.

As shown, the user quality of service (QoS) parameter 30 is converted to a lower quality of application quality of service (QoS) parameter through the quality of service (QoS) mapping 40 at layer 1.

The converted parameters are then translated into resource requirements for the local OS at layer 2 (50) and then negotiated to satisfy the local OS and resource requirements through admission control.

As a result of the negotiation, if the negotiation succeeds, a resource reservation for the local OS is negotiated and negotiation with respect to the other layer 2 (80) with which the connection is established is performed.

If the negotiation is successful, the application quality of service (QoS) parameter is converted into a network quality of service (QoS) parameter of the lower layer through the quality of service (QoS) mapping.

Accordingly, the converted parameters perform the same process as described above in layer 3 (70) and then negotiate with layer 3 (90), which is the same layer on the other side, after receiving a resource reservation for the local OS.

Such a method can negotiate quality of service (QoS) only in a limited environment where admission control, resource reservation, etc. can be performed under a real-time OS.

However, in the multimedia service system according to the prior art, in a general office environment using a general-purpose OS such as Windows NT / 95 and Ethernet on a PC, real-time scheduling, admission control, and resource reservation are performed. Since it does not support reservation, etc., the quality of service (QoS) negotiation of the above-described method cannot be used, and at run-time when the state is dynamically changed even if the quality of service (QoS) is negotiated by another method. There is a problem that cannot satisfy the quality of service (QoS).

In addition, in the prior art, when using a plurality of multimedia applications at the same time to use a variety of multimedia services, each of the multimedia applications are developed independently so there is no correlation between the multimedia applications between the multimedia applications Since control is impossible, in order to use other multimedia applications, execution of the multimedia application program used must be terminated. Therefore, there is a problem in that multiple multimedia applications cannot be used at the same time.

Accordingly, the present invention has been made to solve the above problems, the quality of service between the multimedia applications as well as within the multimedia applications in the state of the network and the local computer dynamically changing in a general office environment; It is an object of the present invention to provide a scalable system of multimedia services to adequately guarantee QoS.

1 is a diagram illustrating a multimedia service system according to the prior art.

2 is a diagram illustrating a general configuration of a three-layer Quality of System (QoS) system according to the prior art;

3 is a diagram illustrating a configuration of an extended system of a multimedia service according to the present invention.

4 is a diagram illustrating a process of exchanging information between quality of service (QoS) managers in an extended system of a multimedia service according to the present invention.

5 is a diagram illustrating a service request process of a multimedia application program in an extension system of a multimedia service according to the present invention;

6 is a diagram illustrating a correlation between a quality of service (QoS) manager and a multimedia application program or a service manager in an extended system of a multimedia service according to the present invention.

Explanation of symbols for main parts of the drawings

100 to 300: first to third hosts

410: Quality of Service (QoS) Manager

420: Service Manager

430: multimedia application

Features of the extended system of the multimedia service according to the present invention for achieving the above object is a quality of service (QoS) manager that adjusts, manages, or controls the quality of service (QoS) in one host and the entire system; And a plurality of service managers for controlling and managing resources shared among multimedia application programs under the control of the quality of service (QoS) manager or for providing basic services required by the multimedia application program.

Another feature of the extended system of the multimedia service according to the present invention for achieving the above object is that the Quality of Service (QoS) manager adjusts and manages the quality of service (QoS) periodically or whenever an event occurs. To control it.

Another feature of the extended system of multimedia services according to the present invention for achieving the above object is that all the quality of service (QoS specification) that can be obtained from its local computer in each of a plurality of networked connected hosts (QoS specification) And detecting optimally adjusted quality of service (QoS) parameters, control information, and status information, and the quality of service (QoS) parameters and status information related to the connected parties. Respectively transmitting to the connected party, the transmitted party QoS parameter, status information, and the current QoS parameter of the current QoS manager, status information and the local computer. Optimized service according to changed quality of service specification and status information 'S quality parameters may makin done in step with the detection step and the transmission step of detecting (QoS parameter), control information, status information, a step of performing each event of a periodic or a specific event (event).

Another feature of an extended system of a multimedia service according to the present invention for achieving the above object is a service start request step for requesting service start in a multimedia application program, and a service ID corresponding to the service start request. A service ID transmission step of transmitting a service, a service request step of requesting a service according to the transmitted service ID, a service transmission step of transmitting a service corresponding to the service request, and the service request step And repeating the service transmission step until the end of the service.

Another feature of the extended system of the multimedia service according to the present invention for achieving the above object is that the quality of service parameters (QoS parameters) of the service when the multimedia application or service manager (service manager) starts to run Registering with a QoS manager; and specifying specifications of its QoS parameters periodically or at the time of occurrence of a specific event in the multimedia application or service manager. Transmitting status information to a QoS manager, wherein the QoS manager adjusts the service according to the specification and status information of the transmitted QoS parameters. Specification of quality parameters and Transmitting the status information to a multimedia application program or a service manager, performing a dynamic adaptation according to the transmitted quality of service parameters and control information; And releasing the quality of service (QoS) parameters registered in the quality of service (QoS) manager at the end of the multimedia application program or service manager after repeating the transmitting and performing steps.

Hereinafter, exemplary embodiments of an extended system of a multimedia service according to the present invention will be described with reference to the accompanying drawings.

3 is a diagram illustrating a configuration of an extended system of a multimedia service according to the present invention, in which first to third hosts 100 to 300 are connected and connected through a network.

Each of the first to third hosts 100 to 300 may include a quality of service (QoS) manager 410 for adjusting, managing, and controlling a quality of service (QoS) or controlling the entire system, and the quality of service (QoS) manager ( Under the control of 410, a plurality of service managers 420 control or manage resources shared between the multimedia applications 430 or provide basic services required by the multimedia applications 430.

As a service manager 420 for systematically controlling and managing resources shared between the multimedia application programs 430, a network manager performing all functions related to a network, such as transmission and reception on a network, and input / output of audio (Recording / There is an audio manager in charge of playing, a video manager in charge of video gap (C apartment) from the camera, and a database manager in which all operations related to the database are performed.

In addition, as a service manager 420 that provides basic services required by the multimedia applications 430, a video codec manager that provides a video codec such as H.261, H.263, JPEG, MPEG, and Wavelet_based Video Codec (Video) Codec Manager, Audio Codec Manager and Mixing to provide audio codec such as G.711, G.722, G.723, G.728, G.729, GSM And a Manager (Mixing Manager).

4 is a diagram illustrating an information exchange process between QoS managers in an extended system of a multimedia service according to the present invention, FIG. 5 is a diagram illustrating a service request process of a multimedia application program in an extended system of a multimedia service according to the present invention. 6 is a diagram illustrating a correlation between a QoS manager and a multimedia application program or a service manager in an extended system of a multimedia service according to the present invention.

The operation of the extended system of the multimedia service according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, the quality of service (QoS) manager 410 of each of the first to third hosts 100 to 300 is inputted through a user interface of the application 430 or a user interface of its own. Current state of the network, estimated by information such as user preferences, delays transmitted from connected parties, error rates, loss rates, and the current local computer's CPU. Load, state of process or thread's priority, etc. Quality of service specification and state information transmitted from multiple applications and service manager 420 In addition, the optimal quality of service (QoS) parameters and the number of parameters are adjusted by adjusting the information of the other party and the quality of service required by the other party. It generates control information for controlling the application 430, the service manager 420.

A dynamic adaptation is performed based on the adjusted quality of service (QoS) parameters and control information.

In addition, the quality of service (QoS) parameters and status information related to the connected party are periodically transmitted to the connected party.

Such quality of service (QoS) adjustment of the quality of service (QoS) manager 410 occurs periodically or at the occurrence of a specific event, and the quality of service (QoS) manager 410 is a quality of service at run-time. (QoS) Iteratively conducts a series of processes to continue to find the optimal point that can best satisfy the specification.

A process of exchanging information by the Quality of Service (QoS) managers existing on each host will be described with reference to FIG. 4 as follows.

First, each of the first and second quality of service (QoS) managers 510 and 520 in each of the plurality of networked hosts is connected with all the quality of service specifications (QoS specification) that can be obtained from its local computer. With the status information, it detects the optimal adjusted QoS parameters, control information, and status information.

Thereafter, each of the first and second quality of service (QoS) managers 510 and 520 respectively transmits a quality of service parameter (QoS parameter) and state information related to the connected parties to the connected party.

Each of the first and second quality of service (QoS) managers 510 and 520 may then transmit the transmitted quality of service parameter, the status information, and the quality of service parameter of the current quality of service manager. (QoS parameter), detects optimally adjusted QoS parameters, control information, and status information according to QoS information and status information changed in the local computer.

Thereafter, each of the first and second quality of service (QoS) managers 510 and 520 performs the transmission step and the detection step whenever a periodic or specific event occurs.

Each of the first and second quality of service (QoS) managers 510 and 520 of the first to third hosts 110 to 300 may have a structure of a client / server or a master / slave. Rather than being in relation to), they perform the same algorithms at equal positions.

Herein, the process of exchanging information between the first and third quality of service (QoS) managers 510 (unsigned) or the second and third quality of service (QoS) managers 520 (unsigned) is the same as that described above. Omit.

Meanwhile, the plurality of service managers 420 control or manage resources shared between the multimedia applications 430 according to the control of the quality of service (QoS) manager 410 or require the multimedia applications 430. It provides a basic service.

That is, the service manager 420 for systematically controlling and managing the resources shared among the multimedia application programs 430 includes a network manager that performs all functions related to the network such as transmission and reception on the network, and input / output of audio. Audio manager responsible for playing / playing, video manager responsible for video gapping from the camera (C apartment), and database manager (DB Manager) that performs all tasks related to the database.

In addition, as a service manager 420 that provides basic services required by the multimedia applications 430, a video codec manager that provides a video codec such as H.261, H.263, JPEG, MPEG, and Wavelet_based Video Codec (Video) Codec Manager, Audio Codec Manager and Mixing to provide audio codec such as G.711, G.722, G.723, G.728, G.729, GSM And a Manager (Mixing Manager).

These service managers 420 can be easily added to or deleted from the entire system.

In addition, a process of receiving a service from the multimedia application program by the service manager 420 will be described with reference to FIG. 5.

First, the multimedia application 610 requests to start a service.

Then, the service manager 620 detects and transmits a service ID corresponding to the service start request.

Accordingly, the multimedia application 6100 requests a service according to the transmitted service ID.

The service manager 620 then transmits a service corresponding to the service request.

Thereafter, the multimedia application program 610 and the service manager 620 repeat the service request and service transmission process until the end of the service.

For example, the multimedia application 610 receives a service from a video codec manager (hereinafter, referred to as a VM). For example, the multimedia application 610 requests the VM to start MPEG compression service.

Then, after receiving the service start request, the VM creates and initializes an MPEG compression process and transmits a service ID corresponding to the service start request.

Accordingly, the multimedia application 610 requests the MPEG compression service to the VM along with the data to be compressed using the transmitted service ID.

The VM then compresses the data according to the MPEG compression service request and transmits the compressed result.

The process of transmitting the MPEG compression service request and the compressed result is repeated until use of the MPEG compression service is terminated.

Thereafter, after the use of the MPEG compression service is terminated, the multimedia application program 610 sends a service termination request to the VM and returns the service ID to the VM.

In addition, the correlation between the quality of service (QoS) manager and the multimedia application program or service manager will be described with reference to FIG. 6.

First, the multimedia application program or service manager 710 is a user interface (QoS) manager 710 periodically or when a specific event occurs in order to ensure maximum quality of service (QoS) at the time of execution. The user preferences inputted through 730 and the requirements required for execution are converted into quality of service (QoS) specification and transmitted along with the current information.

Quality of service (QoS) manager 720 then aggregates all the transmitted information and transmits adjusted quality of service (QoS) parameters and control information that best meets the quality of service (SPoS) specification. .

Accordingly, the multimedia application program or service manager 710 performs a dynamic adaptation using the transmitted quality of service (QoS) parameters and control information.

When described in detail with respect to the above series of processes as follows.

First, when the multimedia application program or the service manager 710 starts execution, its quality of service parameters (QoS parameters) are registered in the service quality manager 720.

The quality of service manager 720 may then specify the specification and state information of its quality of service parameters periodically or at the time of occurrence of a specific event in the multimedia application or service manager. send.

The quality manager (QoS manager) is the specification and status information of the QoS parameters adjusted according to the specification and status information of the transmitted quality of service parameters (QoS parameters) Send it.

Then, the multimedia application program or service manager 720 performs dynamic ad apartment according to the transmitted quality of service parameters and control information.

In addition, the multimedia application program or service manager 720 repeats the above process and releases the quality of service (QoS) parameter registered in the quality of service (QoS) manager upon termination.

As described above, the scalable system of the multimedia service according to the present invention properly provides the QoS (Quality of Service) between the multimedia applications as well as the multimedia applications in the state of a dynamically changing network and a local computer in a general office environment. This guarantees that general-porpose, such as Windows NT / 95 on a PC, is not only available in limited environments where Admission Control, Resource Reservation, etc. can be performed under a real-time OS. It can be used in general office environment using OS, Ethernet, etc.

In addition, the present invention has the advantage of good determinism since it is easy to add and delete the corresponding service manager when adding or deleting a shared resource or when adding or deleting a basic service required by a multimedia application program.

Claims (5)

A Quality of Service (QoS) Manager that coordinates, manages, and controls Quality of Service (QoS) within a host or controls the entire system; Multimedia comprising a plurality of service managers that control and manage resources shared among multimedia applications under the control of the quality of service (QoS) manager or provide basic services required by the multimedia application Scalable system of services. The method of claim 1, The Quality of Service (QoS) Manager And adjusting, managing, and controlling the quality of service (QoS) periodically or whenever an event occurs. Optimized quality of service parameters, control information, and status information with all quality of service specifications and status information that can be obtained from its local computer on each of the multiple connected hosts. Detecting; Transmitting quality of service (QoS) parameters and status information related to the connected counterparts to the connected counterparts, respectively; The transmitted quality of service parameter (QoS parameter), the status information and the current quality of service (QoS parameter) of the current QoS manager (QoS manager), the status information and the quality of service specification changed in the local computer Detecting optimum quality of service (QoS) parameters, control information, and status information according to the " And a step of performing the transmission step and the detection step every time a periodic or specific event occurs. A service start request step of requesting service start from a multimedia application program; A service ID transmission step of transmitting a service ID corresponding to the service start request; A service request step of requesting a service according to the transmitted service ID; A service transmission step of transmitting a service corresponding to the service request; And repeating the service request step and the service transmission step until the end of the service. Registering their Quality of Service parameters with the Quality of Service manager when the multimedia application or service manager starts execution; Periodically or when a specific event occurs in the multimedia application program or service manager, the specification and status information of its QoS parameters are transferred to the QoS manager. Transmitting; The quality manager (QoS manager) is the specification and status information of the QoS parameters adjusted according to the specification and status information of the transmitted quality of service parameters (QoS parameters) Transmitting the data to a multimedia application program or a service manager; Performing a dynamic ad apartment according to the transmitted quality of service parameters and control information; And repeating the transmitting and performing steps and releasing the quality of service (QoS) parameters registered in the quality of service (QoS) manager at the end of the multimedia application or service manager. .