WO2016064139A1 - Large scale group communication method and system - Google Patents
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- WO2016064139A1 WO2016064139A1 PCT/KR2015/010942 KR2015010942W WO2016064139A1 WO 2016064139 A1 WO2016064139 A1 WO 2016064139A1 KR 2015010942 W KR2015010942 W KR 2015010942W WO 2016064139 A1 WO2016064139 A1 WO 2016064139A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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- 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.
- 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
- 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
- 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.
- 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.
- 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)
- 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.
- 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.
- DTS Data Transfer System
- MPS Media Processing System
- 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.
- 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.
- DTS data transfer system
- 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.
- 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.
- 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.
- large-scale group communication system 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- DTS distributed data transmission systems
- MPS media processing systems
- 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
- DTS distributed data transmission system
- MPS media processing system
- 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.
- FIG. 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.
- 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.
- FIG. 6 is a flowchart illustrating a group communication method in a media server system having a distributed structure according to the prior art.
- 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.
- FIG. 1 is a flowchart schematically illustrating a large group communication method according to an embodiment of the present invention
- 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.
- 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).
- 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.
- 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 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.
- a function of updating the terminal information to the session object and notifying the MPS may be performed.
- the process of updating the session object can be performed as shown in the figure.
- 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.
- 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.
- 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.
- 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.
- the MPS may replace the above process by updating the information of the DTS connected to the DTS list of the corresponding session object.
- FIG. 5 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.
- 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.
- 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.
- 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.
- a large-scale group communication system 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.
- 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.
- 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).
- the terminal groups 10, 20, and 30 of region A are composed of 1,500 terminals
- the terminal groups 40, 50,60 is 2,000
- 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,
- a plurality of sessions are conducted, the characteristics of the processes of distributed DTS and MPS groups will be described.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- the DTS manages access to the detailed session information corresponding to the session code.
- 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.
- 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.
- 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.
- the MPS receives session information from the corresponding DTS and generates a session object (second session object) corresponding thereto.
- a session object second session object
- FIG. 5 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.
- 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.
- the MPS may include a layout control function for supporting various image arrangement functions of the terminals in synthesizing the media data.
- 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.
- 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).
- a total of 4,500 terminals distributed in three regions 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.
- DTS1 (100) is connected to the terminal group (10, 20) consisting of 500 in each region A
- DTS2 (110) is connected to the terminal group 40 consisting of 500 in the region B is confirmed that the session 1
- 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.
- 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.
- 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.
- 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 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.
- 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.
- 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.
- various conventional regulations such 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.
- 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.
Abstract
Description
Claims (12)
- 접속 관리 서버로부터 제공된 DTS(Data Transfer System) 접속 정보를 이용하여 1 이상의 단말이 DTS에 접속되는 단말 접속 단계;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;상기 단말 접속 단계를 통해 단말 접속이 완료된 DTS에 접속된 단말의 리스트 정보를 포함하는 제 1 세션 오브젝트(session object)가 생성되는 제 1 세션 오브젝트 생성 단계;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;상기 제 1 세션 오브젝트 생성 단계를 통해 제 1 세션 오브젝트의 생성이 완료된 1 이상의 DTS가 상기 접속 관리 서버로부터 할당된 MPS(Media Processing System)에 접속한 후 세션 정보를 MPS 및 접속 단말에게 송신하는 세션 정보 송신 단계; 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;상기 세션 정보 송신 단계를 통해 세션 정보를 수신받은 MPS가 상기 세션 정보를 이용하여 접속된 DTS 리스트 정보 및 각각의 DTS에 접속된 단말 리스트 정보를 포함하는 제 2 세션 오브젝트를 생성하는 제 2 세션 오브젝트 생성 단계; 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;상기 제 2 세션 오브젝트 생성 단계를 통해 생성된 제 2 세션 오브젝트 내에 정보가 포함된 DTS로부터 수신된 단말의 미디어 데이터를 합성 및 인코딩하여 상기 DTS로 송신하는 제 1 미디어 데이터 송신 단계; 및A 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; And상기 제 1 미디어 데이터 송신 단계를 통해 송신된 미디어 데이터가 DTS를 통해 각각의 단말로 전송되는 제 2 미디어 데이터 송신 단계;를 포함하는 대규모 그룹통신 방법.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.
- 제 1 항에 있어서,The method of claim 1,상기 제 1 세션 오브젝트 및 제 2 세션 오브젝트에 포함되는 단말 리스트 정보는, 단말 특성별 영상 품질 조건 정보(이하, 스트림 타입(stream type)이라 한다)를 포함하는 것을 특징으로 하는 대규모 그룹통신 방법.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.
- 제 2 항에 있어서,The method of claim 2,상기 제 1 미디어 데이터 송신 단계에 있어, DTS로부터 수신된 단말의 미디어 데이터는 상기 MPS에 의해 상기 스트림 타입에 대응되는 1 이상의 형태로 인코딩되는 것을 특징으로 하는 대규모 그룹통신 방법.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.
- 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,The method according to any one of claims 1 to 3,상기 DTS 및 MPS는, CPU 사용량 정보, 메모리 용량 정보 및 네트워크 대역폭 사용량 정보를 포함하는 성능지수 정보를 일정 주기마다 상기 접속 관리 서버에 전송하는 것을 특징으로 하는 대규모 그룹통신 방법.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.
- 제 4 항에 있어서,The method of claim 4, wherein상기 MPS는, 상기 제 1 미디어 데이터 송신 단계에 포함되는 미디어 데이터의 합성 과정에서 단말의 스트림 타입에 대응되는 다양한 영상 배치를 위한 레이아웃 제어 기능을 제공하는 것을 특징으로 하는 대규모 그룹통신 방법.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.
- 데이터베이스;Database;상기 데이터베이스와 연동되며, 그룹통신망의 자원을 관리하고 세션 동기화를 수행하는 접속 관리 서버;An access management server interworking with the database and managing resources of a group communication network and performing session synchronization;상기 접속 관리 서버와의 인증 절차를 통해 상기 그룹통신망에 접속되는 다수의 단말;A plurality of terminals connected to the group communication network through an authentication procedure with the access management server;상기 접속 관리 서버의 할당에 의해 상기 1 이상의 단말을 포함하는 단말 그룹과 연결되며, 상기 단말 그룹에 포함된 각각의 단말에 미디어 데이터의 송수신을 중계하기 위한 DTS; 및A 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; And상기 DTS로부터 상기 단말의 미디어 데이터를 전달받아 합성 및 인코딩 한 후 상기 DTS를 통해 상기 각각의 단말로 전송하는 MPS;를 포함하는 대규모 그룹통신 시스템.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.
- 제 6 항에 있어서,The method of claim 6,상기 DTS는, 상기 접속 관리 서버에 의해 할당된 단말 그룹에 포함되는 단말 리스트 정보 및 각각의 단말의 스트림 타입을 포함하는 제 1 세션 오브젝트를 생성하여 관리하는 것을 특징으로 하는 대규모 그룹통신 시스템.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.
- 제 7 항에 있어서,The method of claim 7, wherein상기 MPS는, 상기 DTS 제 1 세션 오브젝트에 대응되도록, DTS 리스트 정보, 단말 리스트 정보 및 각각의 단말의 스트림 타입을 포함하는 제 2 세션 오브젝트를 생성하여 관리하는 것을 특징으로 하는 대규모 그룹통신 시스템.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.
- 제 8 항에 있어서,The method of claim 8,상기 MPS는 상기 DTS로부터 수신된 단말의 미디어 데이터를 상기 스트림 타입에 대응되는 1 이상의 형태로 인코딩 하는 것을 특징으로 하는 대규모 그룹통신 시스템.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.
- 제 6 항 내지 제 9 항 중 어느 한 항에 있어서,The method according to any one of claims 6 to 9,상기 미디어 처리 장치는, 미디어의 합성 과정에서 단말들의 다양한 영상 배치를 위한 레이아웃 제어 기능을 제공하는 것을 특징으로 하는 대규모 그룹통신 시스템.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.
- 제 10 항에 있어서,The method of claim 10,상기 접속 관리 서버는, 상기 데이터베이스와의 연동을 통해 세션 별 실시간 리소스(resource) 정보를 파악함으로써, 이를 이용해 상기 단말에 DTS를 할당하고, 상기 DTS에 MPS를 할당하는 것을 특징으로 하는 대규모 그룹통신 시스템.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. .
- 제 10 항에 있어서,The method of claim 10,상기 DTS 및 상기 MPS는, CPU 사용량 정보, 메모리 용량 정보 및 네트워크 대역폭 사용량 정보를 포함하는 성능지수 정보를 일정 주기마다 상기 접속 관리 서버에 전송하는 것을 특징으로 하는 대규모 그룹통신 시스템.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.
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