WO2016064139A1

WO2016064139A1 - Large scale group communication method and system

Info

Publication number: WO2016064139A1
Application number: PCT/KR2015/010942
Authority: WO
Inventors: 남궁환식; 권기훈
Original assignee: (주)해든브릿지
Priority date: 2014-10-21
Filing date: 2015-10-16
Publication date: 2016-04-28

Abstract

The present invention relates to a large scale group communication method and system and, more specifically, to a large scale group communication method and system for providing, to locally distributed large scale connection terminals, a service on the same session without quality deterioration and in real time. To this end, the present invention provides a large scale group communication method comprising: a terminal connection step of enabling one or more terminals to be connected to a data transfer system (DTS) by using optimum DTS connection information provided from a connection management server; a first session object creation step of creating a first session object including list information of terminals connected to the DTS to which a terminal connection has been completed through the terminal connection step; a session information transmission step of enabling one or more DTSs, in which the creation of the first session object has been completed through the first session object creation step, to be connected to an optimum media processing system (MPS) allocated from the connection management server, and then to transmit session information to the MPS and the connection terminals; a second session object creation step of enabling the MPS, which has received the session information through the session information transmission step, to create a second session object including list information of connected DTSs and list information of terminals connected to the respective DTSs, by using the session information; a first media data transmission step of synthesizing and encoding media data of a terminal received from the DTS of which information is included in the second session object created through the second session object creation step, so as to transmit the synthesized and encoded media data to the DTS; and a second media data transmission step of transmitting the media data transmitted through the first media data transmission step to the respective terminals through the DTS.

Description

Large Group Communication Method and System

The present invention relates to a large-scale group communication method and system, and more particularly, to a large-scale group communication method and system for providing services in real time without loss of quality in the same session to large-scale locally distributed access terminals. It is about.

In a video conferencing on an IP (Internet Protocol) network, terminals of different locations are connected to expensive MCUs, synthesized media from each terminal, and transmitted to the connected terminals to perform two-way video communication. Implemented in such a way as to achieve

However, in such a scheme, in order to access a large number of terminals in a corresponding session, a communication socket must be configured along with a resource burden for processing this in proportion to the number of terminals to be accessed on the MCU side. There is a problem that the network bandwidth for transmitting to the terminal is inevitably concentrated.

In order to solve this problem, a method of dividing the MCU into a master and a slave to enable a plurality of terminals distributed locally in a single session to a single session has been introduced. By re-compositing the master in the MCU, there is a problem such as lack of flexibility in the layout processing of the image and the burden of expensive MCU addition.

As another method, there is a method of streaming relaying media data of a video conference through a relay server, but terminals connected through the relay server cannot participate in bidirectional communication and provide a one-way service that receives only relayed media data. Only it is possible.

In other words, the group communication method such as the conventional video conferencing has to rely on the performance and network bandwidth of the MCU in order to provide high quality communication while maintaining bidirectionality to the users communicating over the same session, due to this limitation The flexibility of the video layout and the limitations of handling large-scale video conferencing that are accessible to all session participants while maintaining two-way communication.

Korean Patent No. 10-1085063 (the name of the invention: a group communication method in a media server system having a distributed structure), which is a prior patent of the present applicant, has some similarities to the present invention in terms of using a distributed structure. 6 is a flowchart illustrating a group communication method according to the registered patent.

Referring to FIG. 6, in the case of the registered patent, since it is simply a structure for relaying media data and control signals between terminals by a data transmission processing system having a distributed structure, the same as the connection of terminals providing video or audio increases. It can be seen that the terminals connected to the session are forced to increase the amount of video or audio data of other terminals that are received from the data transmission system.

In addition, due to such a configuration limitation, the terminal imposes a heavy burden on the CPU for decoding the corresponding media data, and is limited by the number of terminals that can provide video or audio in the same session due to an increase in the reception network bandwidth. There is also a problem such as that. This is particularly difficult to apply due to the processing limitations of the CPU in mobile devices such as smart phones, which are becoming more common today.

Therefore, in order to maintain bidirectional communication on the same session while ensuring the flexibility of the layout, and to process a large access terminal including a mobile device, a new terminal access processing method that is different from the conventional MCU method is required.

(Prior art document)

(Patent Document 1) Republic of Korea Patent Publication No. 10-2014-98573 (name of the invention: video conferencing service providing apparatus and method)

(Patent Document 2) Korean Unexamined Patent Publication No. 10-2014-16154 (name of the invention: video conference method and system of various participating devices)

(Patent Document 3) Korean Patent Publication No. 10-1085063 (Invention name: Group communication method in a media server system having a distributed structure)

Disclosure of Invention The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a large-scale group communication method and system for providing services in real time without loss of quality in the same session to large-scale locally distributed access terminals. There is this.

In other words, the present invention allows a large number of geographically distributed access terminals to access a plurality of distributed Data Transfer System (DTS) in the same session to transmit respective media data, so that the MPS (Media Processing System) burdens the terminal access processing. And a large group communication system and method, which is free from network centralization and performs a synthesizing function of media data, and terminals connected to different DTSs can maintain session synchronization of a data transmission system to maintain bidirectional communication. The purpose is to provide.

In addition, in this process, when various access terminals in different group communication environments perform large-scale bidirectional group communication, additional functions such as providing group communication with a quality suitable for the corresponding group communication environment may be provided. have.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned above can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

The large-scale group communication method of the present invention for achieving the above object comprises: a terminal connection step in which one or more terminals are connected to the DTS using optimal data transfer system (DTS) connection information provided from a connection management server; A first session object generating step of generating a first session object including list information of a terminal connected to a DTS in which terminal access is completed through the terminal access step; One or more DTSs having completed the creation of the first session object through the first session object generation step access the optimal MPS (Media Processing System) allocated from the connection management server and then transmit session information to the MPS and the access terminal. Sending session information; Generating a second session object for the MPS receiving the session information through the session information transmitting step to generate a second session object including the connected DTS list information and the terminal list information connected to each DTS using the session information. step; A first media data transmission step of synthesizing, encoding, and transmitting the media data of the terminal received from the DTS including information in the second session object generated through the second session object generation to the DTS; And a second media data transmission step of transmitting the media data transmitted through the first media data transmission step to each terminal through the DTS.

In this case, the terminal list information included in the first session object and the second session object may include image quality condition information (hereinafter, referred to as a stream type) for each terminal characteristic.

At this time, in the first media data transmission step, it may be preferable that the media data of the terminal received from the DTS is encoded in one or more forms corresponding to the stream type by the MPS.

The DTS and the MPS may be configured to transmit performance index information including CPU usage information, memory capacity information, and network bandwidth usage information to the connection management server at regular intervals.

In addition, the MPS may be configured to provide a layout control function for arranging various images corresponding to the stream type of the terminal in the synthesis process of the media data included in the first media data transmission step.

On the other hand, large-scale group communication system according to an embodiment of the present invention, the database; An access management server interworking with the database and managing resources of a group communication network and performing session synchronization; A plurality of terminals connected to the group communication network through an authentication procedure with the access management server; A DTS connected to a terminal group including the one or more terminals by assignment of the access management server, for relaying transmission and reception of media data to each terminal included in the terminal group; And an MPS receiving the media data of the terminal from the DTS, synthesizing and encoding the terminal, and transmitting the synthesized data to the respective terminals through the DTS.

In this case, the DTS may be configured to generate and manage a first session object including terminal list information included in a terminal group allocated by the access management server and a stream type of each terminal.

In addition, the MPS may be configured to generate and manage a second session object including the DTS list information, the terminal list information, and the stream type of each terminal, so as to correspond to the DTS first session object.

In this case, the MPS may be configured to encode media data of the terminal received from the DTS in one or more forms corresponding to the stream type.

In addition, the media processing apparatus may be configured to provide a layout control function for arranging various images of terminals in a process of synthesizing media data.

Here, the access management server is configured to identify the real-time resource (resource) information for each session through interworking with the database, thereby assigning the most suitable DTS to the terminal, and to allocate the most suitable MPS to the DTS. Can be.

The DTS and the MPS may be configured to transmit performance index information including CPU usage information, memory capacity information, and network bandwidth usage information to the access management server at regular intervals.

According to the present invention as described above, a large number of geographically distributed access terminals via a plurality of distributed data transmission systems (DTS) and media processing systems (MPS) in the same session, two-way video conferencing in a quality suitable for each communication environment It is effective to be able to receive the or of the two-way broadcast service.

In addition, the present invention enables the distributed data transmission system (DTS) to support the clustering structure to enable massive accessor processing in the same session, and the media processing system (MPS) and a plurality of such a large number of sessions can be serviced In addition, by supporting the cascading structure, it is possible to support stable service while maintaining the appropriate quality for each resource according to various terminal characteristics such as the efficient use of network bandwidth and bandwidth, so that two-way remote It can be applied to various fields such as entertainment, which requires education or broadcasting of two-way event events, two-way seminar relaying, and public sectors such as disaster and disaster response, and two-way home shopping, so that a large number of users can be processed in the same session.

1 is a flowchart schematically showing a large group communication method according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram conceptually illustrating a communication structure relationship between a terminal, a connection management server, a DTS, and an MPS in the large-scale group communication method of FIG.

3 is an explanatory diagram schematically showing the configuration of a large-scale group communication system according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram summarizing connection relations between respective UE groups, DTSs, and MPSs shown in FIG.

FIG. 5 is an exemplary diagram for describing the relationship between session object structure in DTS and MPS applied to FIGS. 1 to 3.

6 is a flowchart illustrating a group communication method in a media server system having a distributed structure according to the prior art.

The objects, features, and advantages of the present invention described above will become more apparent through the following embodiments in conjunction with the accompanying drawings.

The following specific structural to functional descriptions are merely illustrated for the purpose of describing embodiments in accordance with the concepts of the present invention, and embodiments in accordance with the concepts of the present invention may be embodied in various forms and may not be described in the specification or the application. It should not be construed as limited to the embodiments.

Embodiments in accordance with the concepts of the present invention can be variously modified and have a variety of forms specific embodiments will be illustrated in the drawings and described in detail in the specification or the application. However, this is not intended to limit the embodiments in accordance with the concept of the present invention to a specific disclosed form, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and / or second may be used to describe various components, but the components are not limited to the terms. The terms are only for the purpose of distinguishing one component from other components, for example, without departing from the scope of the rights according to the inventive concept, the first component may be called a second component, and For example, the second component may also be referred to as a first component.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected or connected to that other component, but it may be understood that other components may be present in the middle. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle. Other expressions to describe the relationship between components, such as "between" and "immediately between" or "adjacent to" and "directly adjacent to", should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. As used herein, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is described, and that one or more other features or numbers, It is to be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined herein. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1 is a flowchart schematically illustrating a large group communication method according to an embodiment of the present invention, and FIG. 2 is a conceptual diagram illustrating a communication structure relationship between a terminal, a connection management server, a DTS, and an MPS in the large group communication method of FIG. It is explanatory drawing shown.

First, referring to FIG. 1, in a large-scale group communication method according to an embodiment of the present invention, a terminal access step (S110), a first session object generation step (S120), a session information transmission step (S130), and a second session object It can be seen that it is configured to include the generation step (S140), the first media data transmission step (S150) and the second media data transmission step (S160).

Hereinafter, the entire process of the large-scale group communication method according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

The first step (1 in FIG. 2) represents a step in which a certain terminal group 10 to 80 logs in to the access management server 300 to receive the group communication service, and the second step thereafter is the access management server 300. Indicates a step of allowing service access through user authentication of the terminal.

In the third step, when a terminal group 10 to 80 that is allowed to access a service selects a random session, an optimum corresponding to each of the DTS (Data Transfer System)

groups

100, 110, and 120 to which the connection management server 300 is registered is selected. The step of selecting the DTS connection information from the database 400 and allocating to the terminals constituting each terminal group (10 ~ 80).

Thereafter, the fourth step includes accessing the DTSs to which the terminal groups 10 to 80 are allocated and delivering the respective session codes to be accessed, and the

DTSs

100, 110, and 120 that have received the session codes correspond to the corresponding session objects. The fifth step is constituted by a process in which a function such as identifying existence exists is performed.

In this case, when a corresponding session object is already generated in the DTS, a function of updating the terminal information to the session object and notifying the MPS (Media Processing System; 200, 210) may be performed. The process of updating the session object can be performed as shown in the figure.

If any terminal requests a session access that has not been established before, it is identified as a new session in which the session object does not exist in the DTS, and detailed information corresponding to the requested session code is obtained by the web service of the access management server 300. Received from the database 400 through the through, to form a session object (first session object) including a list of access terminals, stream type (Stream Type) list according to the terminal characteristics, session information and access MPS, such as The sixth step is accomplished by the same process.

In the seventh step, the DTS (100, 110, 120) selects the optimal MPS from the database 400 through the web service of the access management server 300, the information of the selected MPS is also stored in the first session object.

In the seventh step, the DTS (100, 110, 120) is connected to the socket of the optimal MPS (200, 210) to deliver the corresponding session information in the eighth step, the ninth step is the DTS list, terminal list, stream type in the MPS (200, 210) And a session object (second session object) including information and the like. In this case, when the session object corresponding to the DTS already exists in the optimal MPS connected to the DTS, the MPS may replace the above process by updating the information of the DTS connected to the DTS list of the corresponding session object.

For reference, an exemplary diagram for describing the structural relationship between session objects (first and second session objects) in the DTS and the MPS applied to FIGS. 1 and 2 is shown in FIG. 5.

The tenth step represents a step in which any of the terminal 10 to 80 media is transmitted to the MPS through the DTS through an encoding process by the terminal selection or the control authority of the corresponding session.

Then, the MPS decodes the received media data and synthesizes the media according to the instruction of the session controller or the layout information selected by default, and performs the eleventh step of encoding the data for each stream type defined in the session information. After that, the MPS transmits the layout information and the encoded data to the DTS, and the DTS transmits the composite media data to the terminals according to the terminal list included in the session object, and the composite media received by the terminal from the DTS. Through the thirteenth step of decoding and rendering the data, the execution of the large-scale group communication method according to an embodiment of the present invention is completed.

Referring to FIG. 3, a large-scale group communication system according to an embodiment of the present invention includes basic information of various resources (user, server, network, etc.), session information corresponding to each session purpose, and each system (DTS and MPS). Database 400 storing system performance index information (CPU Usage, network bandwidth used, memory used, session object number and accessor number information, etc.) which are periodically received from the server, and resource registration by the administrator. In addition, a connection management server that responds to a service request such as opening, joining, deleting, or changing a meeting (session) by terminal groups 10 to 80 distributed to a meeting area in a wide area (A, B, C). The server 300, the

DTS groups

100, 110, and 120 that are directly connected to the terminal in group communication and are responsible for control and media data transmission and reception; It can be seen that it is configured to include the MPS group (200, 210) for synthesizing and encoding the media data and transmits back to the terminals through the DTS.

Hereinafter, the function and operation of each of the components will be described in more detail.

For convenience of description, the terminals 10 to 80 to be connected to are first divided into regions A (10, 20, 30), B (40, 50, 60), and C (70, 80). Among the plurality of terminal groups 10 to 80 distributed in regions A, B, and C, the

terminal groups

10, 20, and 30 of region A are composed of 1,500 terminals, and the

terminal groups

40, 50,60 is 2,000, and

C group

70,80 is 1,000, for example, a total of 4,500 geographically dispersed large terminals, such as the process of receiving a group communication service in the same session, When a plurality of sessions are conducted, the characteristics of the processes of distributed DTS and MPS groups will be described.

First, the access management server 300 is a server to which the terminals initially connect, and the service application calls and session-specific resources (resolution, frames per second, bandwidth, maximum number of users, maximum) through login processing and web socket communication through user authentication. By interlocking with the database 400, which stores the number of images), user accounts and various system setting data, etc., the DTS and MPS perform information providing functions to each terminal, DTS and MPS through a web service. It is responsible for delivering performance index information received from the MPS back to the database 400 through a web service.

In addition, the access management server 300, by using the information in the database 400, the terminal allocates the most suitable system among the distributed DTS group when requesting the participation of any session, and again to the DTS to process media data of the access terminals Has the ability to assign MPS. To this end, the DTS and the MPS, their respective performance index (CPU Usage, Memory Capability, Network Bandwidth Usage, service session number and number of users information, etc.) at regular intervals through the web service of the access management server 300, the database 400 It may be desirable to be configured to store in.

In this case, a method for recommending or allocating an optimal system using performance index information may be determined in various ways according to a policy of a service manager, and it may be natural that any method may be applied.

The DTS (100, 110, 120) to transmit the media data and control data, etc. from the terminals (10 ~ 80) to the MPS (200, 210) side in any session, to access the media data synthesized in the MPS (200, 210) to the session And a session object (first session object) for performing a function of transmitting to the terminals.

When the first requesting session of the session is connected, the first session object transfers the session code information acquired from the web to the corresponding DTS, and the DTS manages access to the detailed session information corresponding to the session code. By reading from the database 400 through the web service of the server 300 can be generated to suit this.

At this time, the access terminal information is registered in the terminal list information of the DTS, and is registered in the stream type list grouped according to the transmission / reception image quality condition for each terminal characteristic.

Subsequently, the DTS having selected the optimal MPS from the database 400 connects to the MPS through socket communication through the connection MPS property update process of the session object, and then transfers session information to the MPS. Through this, when the terminal additionally accesses the same DTS to access the session, it is possible to update the terminal list and the stream type list in the corresponding session object and inform the connected MPS.

Meanwhile, when the DTS connects after generating a new session object (first session object), the MPS receives session information from the corresponding DTS and generates a session object (second session object) corresponding thereto. For reference, an exemplary diagram for describing the relationship between the session object structure in the DTS and the MPS applied to FIG. 3 is illustrated in FIG. 5.

The session object in the MPS may include a DTS list, a terminal list, a stream type list of the terminal, a mix object, and the like, connected to the corresponding session. Here, the mix object may include a function of decoding media data received from the terminal, a function of synthesizing the decoded media data, and a function of encoding differently depending on the stream type.

The data encoded in the MPS is transmitted to the

access DTS groups

100, 110 and 120 managed by the DTS list.

In this case, the MPS may include a layout control function for supporting various image arrangement functions of the terminals in synthesizing the media data. In this case, the applied layout information is transmitted to the corresponding access terminals through the DTS. Such information may be used for a purpose of displaying a tag on a component of a synthesized image or changing a layout in a terminal having a control right.

Hereinafter, the terminal 10 to 80 will be described in detail the process of the group communication by connecting to any session (session 1, session 2, session 3).

Referring to FIG. 3, a total of 4,500 terminals distributed in three regions (A, B, and C) receive three DTSs (100, 110, 120) and two MPSs to receive three sessions (session 1, session 2, and session 3). It can be seen that the configuration using (200,210) is shown.

That is, DTS1 (100) is connected to the terminal group (10, 20) consisting of 500 in each region A, and DTS2 (110) is connected to the terminal group 40 consisting of 500 in the region B is confirmed that the session 1 In this case, it can be seen that a total of 1,500 terminals are serving by a clustering structure of two DTSs 100 and 110, and the media synthesis process of session 1 is performed in the MPS1 200.

In addition, the DTS1 (100) is connected to the terminal group 30 consisting of 500 in the A region and the DTS2 (110) is connected to the terminal group 50 consisting of 1,000 in the B region to form a session 2, a total of 1,500 terminals The service is formed by the clustering structure of the two DTSs 100 and 110, and it can be seen that the MPS2 210 is in charge of media composition processing.

Finally, the DTS3 120 is connected to the terminal group 60 consisting of 500 in the B region and the

terminal group

70 and 80 consisting of 500 in the C region, respectively, to show that a total of 1,500 terminals form session 3. Giving. In particular, Session 3 shows that DTS1 and DTS2 are already serving

Sessions

1 and 2, so that service is provided by DTS3 using a cascading structure by Load Balancing. have.

The connection relationship between each terminal group, the DTS and the MPS, and the session relationship serviced by the above are summarized through FIG. 4.

In this case, the large-scale group communication method and system according to an embodiment of the present invention may be meaningless when synthesizing all media of all access terminals when a large-scale connection of hundreds of terminals or more is made in a single session. The terminal for transmitting the media data may be determined according to the selection of. In this case, in order to transmit the media data by the selection of the corresponding terminal, it may be more preferable to be configured to receive permission of the MPS through the DTS in advance.

This is because the number of media to be synthesized in the session is pre-defined, so it may be necessary to check whether or not it meets the criteria. If the predefined number of terminal media is saturated, a process or function may be additionally provided to notify the corresponding terminal requesting permission as a message through the DTS that the media cannot be transmitted.

Alternatively, the application may be configured to select one of the terminals that are being synthesized with the existing data, stop sending media of the terminal, and then send media of the newly applied terminal by applying various conventional regulations. At this time, as a rule applied to the selection of the terminal to stop the media transmission, it is natural that any conventional method may be applied.

However, the configuration of the selective media data transmission allowance for some terminals as described above is just one embodiment of the present invention, and the present invention is not necessarily limited thereto.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

Claims

A terminal connection step of connecting one or more terminals to the DTS using data transfer system (DTS) connection information provided from a connection management server;

A first session object generating step of generating a first session object including list information of a terminal connected to a DTS in which terminal access is completed through the terminal access step;

Session information for transmitting the session information to the MPS and the access terminal after the one or more DTS that has completed the creation of the first session object through the first session object generation step accesses the MPS (Media Processing System) allocated from the connection management server. Transmitting step;

Generating a second session object for the MPS receiving the session information through the session information transmitting step to generate a second session object including the connected DTS list information and the terminal list information connected to each DTS using the session information. step;

A first media data transmission step of synthesizing, encoding, and transmitting the media data of the terminal received from the DTS including information in the second session object generated through the second session object generation to the DTS; And

And a second media data transmission step of transmitting the media data transmitted through the first media data transmission step to each terminal through a DTS.
The method of claim 1,

The terminal list information included in the first session object and the second session object includes video quality condition information (hereinafter referred to as a stream type) for each terminal characteristic.
The method of claim 2,

In the first media data transmission step, the media data of the terminal received from the DTS is encoded by the MPS in one or more forms corresponding to the stream type.
The method according to any one of claims 1 to 3,

The DTS and MPS, the large-scale group communication method characterized in that for transmitting the performance index information, including CPU usage information, memory capacity information and network bandwidth usage information to the connection management server at regular intervals.
The method of claim 4, wherein

The MPS is a large-scale group communication method, characterized in that for providing a layout control function for a variety of video layout corresponding to the stream type of the terminal in the synthesis process of the media data included in the first media data transmission step.
Database;

An access management server interworking with the database and managing resources of a group communication network and performing session synchronization;

A plurality of terminals connected to the group communication network through an authentication procedure with the access management server;

A DTS connected to a terminal group including the one or more terminals by assignment of the access management server, for relaying transmission and reception of media data to each terminal included in the terminal group; And

MPS for receiving the media data of the terminal from the DTS, synthesized and encoded, and then transmitting the MPS to the respective terminals through the DTS.
The method of claim 6,

And the DTS generates and manages a first session object including terminal list information included in a terminal group allocated by the connection management server and a stream type of each terminal.
The method of claim 7, wherein

The MPS generates and manages a second session object including DTS list information, terminal list information, and stream type of each terminal so as to correspond to the DTS first session object.
The method of claim 8,

The MPS is a large-scale group communication system, characterized in that for encoding the media data of the terminal received from the DTS in one or more forms corresponding to the stream type.
The method according to any one of claims 6 to 9,

The media processing apparatus is a large-scale group communication system, characterized in that for providing a layout control function for arranging various images of the terminals in the synthesis of media.
The method of claim 10,

The access management server identifies the real-time resource information for each session through interworking with the database, thereby allocating a DTS to the terminal and assigning an MPS to the DTS. .
The method of claim 10,

And the DTS and the MPS transmit performance index information including CPU usage information, memory capacity information and network bandwidth usage information to the connection management server at regular intervals.