公开(公告)号：KR100453221B1

公开(公告)日：2004-10-15

申请号：KR1020010077325

申请日：2001-12-07

Applicant: 한국전자통신연구원

Inventor： 박주영 ,  고석주 ,  김은숙 ,  강신각

IPC: H04L12/18

Abstract: PURPOSE: A method and a system for transmitting a group cast through a unicast network are provided to efficiently offer a group cast transmission service by composing a tree of an AL(Application Layer) through the unicast network. CONSTITUTION: A specific sender and a plurality of recipients read information about an address to be used in an AL multicast session from a DR(Dedicated Relay), and prepare the AL multicast session(20). The specific sender configures an AL multicast transmission tree among a plurality of the recipients by information about the address(21). The specific sender transmits data to the AL multicast session through the configured AL multicast transmission tree, and provides the data to a plurality of the recipients(22).

Abstract translation: 目的：提供一种用于通过单播网络传送群组的方法和系统，以通过单播网络组成AL（树）应用层来高效地提供群组传送服务。 构成：特定发送者和多个接收者从DR（专用中继）读取关于要在AL多播会话中使用的地址的信息，并准备AL多播会话（20）。 特定发送者通过关于地址（21）的信息在多个接收者中配置AL多播传输树。 特定发送者通过配置的AL多播传输树将数据发送到AL多播会话，并将数据提供给多个接收者（22）。

公开(公告)号：KR1020030059498A

公开(公告)日：2003-07-10

申请号：KR1020010088361

申请日：2001-12-29

Applicant: 한국전자통신연구원

Inventor： 김은숙 ,  고석주 ,  박주영 ,  강신각

IPC: H04L12/18

CPC classification number: H04L12/185 ,  H04L12/189

Abstract: PURPOSE: A multicast transmission system capable of managing a group membership and a method therefor are provided to continuously update and manage membership information of users until a session is ended after the session is generated. CONSTITUTION: An information provider terminal device(100) makes various application sessions for multicast, and provides the various application sessions. The information provider terminal device(100) receives membership information about session participants who participate in the session, and manages received membership information. A membership management server(110) informs the various application sessions provided from the information provider terminal device(100) to a plurality of users connected to a multicast transmission system, through a wired/wireless communication network, and updates and stores membership information about users who actually participate in the session. A user terminal device(102) connects to the membership management server(110) according to the session participation request of the user, participates in a requested session among the various sessions provided from the membership management server(110), executes an application program according to the progress of the corresponding session, and periodically informs the connection to the session to the membership management server(110).

Abstract translation: 目的：提供一种能够管理组成员资格的组播传输系统及其方法，用于在会话生成后持续更新和管理用户的会员信息，直到会话结束为止。 构成：信息提供者终端装置（100）进行组播的各种应用会话，并提供各种应用会话。 信息提供者终端装置（100）接收参与会话的会话参与者的会员信息，并管理所接收的会员信息。 会员管理服务器（110）通过有线/无线通信网络将从信息提供者终端装置（100）提供的各种应用会话通知给与组播传输系统连接的多个用户，更新并存储关于用户的会员信息 谁实际参加了会议。 用户终端设备（102）根据用户的会话参与请求连接到会员管理服务器（110），从会员管理服务器（110）提供的各种会话中参与请求的会话，根据会话管理服务器 到相应会话的进度，并且定期地通知会话到会员管理服务器（110）的连接。

公开(公告)号：KR100358179B1

公开(公告)日：2002-10-25

申请号：KR1020000083241

申请日：2000-12-27

Applicant: 한국전자통신연구원

Inventor： 신명기 ,  고석주 ,  김용진 ,  박기식 ,  박치항

IPC: G06F15/16

Abstract: 1. 청구범위에 기재된 발명이 속하는 기술분야
본 발명은 공유 멀티캐스트 트리 구성 방법 및 상기 방법을 실현시키기 위한 프로그램을 기록한 컴퓨터로 읽을 수 있는 기록매체에 관한 것임.
2. 발명이 해결하고자 하는 기술적 과제
본 발명은, 각 멀티캐스트 사용자에 속한 일반 라우터는 일차 코아 외에 후부 코아 중 자신과 가장 근접해 있는 코아 라우터를 이차 코아로 선정하여, 조인 메시지를 이차 코아에게 먼저 전송하고, 이 메시지를 받은 이차 코아가 일차 코아에게 이 메시지를 포워딩하도록 함으로써, 망 상의 멀티캐스트 트리 구성을 최소화 할 수 있도록 한 공유 멀티캐스트 트리 구성 방법 및 상기 방법을 실현시키기 위한 프로그램을 기록한 컴퓨터로 읽을 수 있는 기록매체를 제공함에 그 목적이 있음.
3. 발명의 해결방법의 요지
본 발명은, 멀티캐스터 데이터 송수신 장치에 적용되는 공유 멀티캐스트 트리를 구성하기 위한 방법에 있어서, 코아 베이스 트리(CBT:Core Based Tree)방식에서 정의된 일차 코아 라우터 외에, 각 멀티캐스트 사용자에 속한 일반 라우터가 망 상에 있는 후보 코아 라우터 중 이차 코아 라우터를 추가로 선택하는 제 1 단계; 상기 일차 코아 라우터 및 상기 이차 코아 라우터가 동일한지를 판단하는 제 2 단계; 및 상기 제 2 단계의 판단 결과에 따라 조인 메시지를 전송하는 제 3 단계를 포함하며, 상기 망 상의 멀티캐스트 트리구성을 최소화 하는 것을 특징으로 한다.
4. 발명의 중요한 용도
본 발명은 멀티캐스터 데이터 송수신 등에 이용됨.

公开(公告)号：KR1020020041852A

公开(公告)日：2002-06-05

申请号：KR1020000071465

申请日：2000-11-29

Applicant: 한국전자통신연구원

Inventor： 고석주 ,  박주영 ,  강신각 ,  김대영

IPC: H04L12/18

CPC classification number: H04L65/4076 ,  H04L67/26

Abstract: PURPOSE: A multicasting transmitting system and method using a repeater server is provided to quickly offer information requested by a plurality of simultaneously connected users by using the repeater server connected to an information provider system through a unicasting backbone transmission network. CONSTITUTION: One repeater server or more(120) are located between an information provider system(100) and a plurality of users(150), and performs a relay so that information request from the users(150) and information provision from the information provider system(100) are smoothly processed. Each repeater server(120) connects to the information provider system(100) by a unicast type, and each repeater server(120) transmits information to the users(150). The information provider system(100) provides information to the users(150) through the repeater server(120) by a multicast type.

Abstract translation: 目的：提供使用中继器服务器的组播发送系统和方法，通过使用通过单播骨干传输网络连接到信息提供者系统的中继器服务器来快速提供由多个同时连接的用户请求的信息。 构成：一个中继器服务器（120）位于信息提供者系统（100）和多个用户（150）之间，并且执行中继，使得来自用户（150）的信息请求和来自信息提供者的信息提供 系统（100）被平滑地处理。 每个中继器服务器（120）通过单播类型连接到信息提供者系统（100），并且每个中继器服务器（120）向用户（150）发送信息。 信息提供者系统（100）通过多播类型通过中继器服务器（120）向用户（150）提供信息。

公开(公告)号：KR1020020041851A

公开(公告)日：2002-06-05

申请号：KR1020000071464

申请日：2000-11-29

Applicant: 한국전자통신연구원

Inventor： 고석주 ,  강신각

IPC: H04L1/00

CPC classification number: H04L1/189 ,  H04L1/1621 ,  H04L1/1835 ,  H04L1/1874 ,  H04L1/188

Abstract: PURPOSE: A method for controlling an error in a multicasting transmission system using a repeater server is provided to disperse the number of a user ACK packet and an error control which are simultaneously received by forming a large scale of user group as a plurality of local groups. CONSTITUTION: A repeater server forms a plurality of local groups intended for a plurality of users in a corresponding area(S201). The repeater server sets and transmits an error control variable to the users(S202). The repeater server receives an information providing request message(S203). It is searched whether a corresponding request data packet is present in a request information buffer(S204). When the corresponding request data packet is present and absent in the request information buffer, the corresponding request data packet and an information providing request message are transmitted to a user(S205) and an information providing system(S206), respectively. A corresponding request data packet is stored in the request information buffer(S207). The stored corresponding request data packet is transmitted to an information user(S208). When a request data packet is normally and abnormally transmitted, the corresponding request data packet is removed and is again transmitted, respectively(S209,S210).

Abstract translation: 目的：提供一种使用中继器服务器来控制组播传输系统中的错误的方法，用于通过形成大量用户组作为多个本地组来分散同时接收的用户ACK分组的数目和错误控制 。 构成：中继器服务器形成用于相应区域中的多个用户的多个本地组（S201）。 中继器服务器向用户设置并发送错误控制变量（S202）。 中继器服务器接收信息提供请求消息（S203）。 搜索请求信息缓冲器中是否存在相应的请求数据分组（S204）。 当请求信息缓冲器中存在和不存在相应的请求数据分组时，分别向用户（S205）和信息提供系统（S206）发送相应的请求数据分组和信息提供请求消息。 相应的请求数据包被存储在请求信息缓冲器中（S207）。 所存储的相应的请求数据包被发送给信息用户（S208）。 当请求数据分组正常和异常发送时，分别对应的请求数据分组被重新发送（S209，S210）。

公开(公告)号：KR100334905B1

公开(公告)日：2002-05-04

申请号：KR1019990047545

申请日：1999-10-29

Applicant: 한국전자통신연구원

Inventor： 고석주 ,  박정수 ,  김용운 ,  김용진

IPC: G06F15/16

Abstract: 본발명은인터넷멀티캐스트(multicast) 응용서비스의신뢰성(reliability)을제공하기위해수송계층(transport layer)에서멀티캐스트그룹참여자(member)들을논리적(logical) 트리(tree)로구성하는수송계층에서의트리구성방법에관한것이다. 본발명은멀티캐스트데이터전송이전에, 송신자(sender)와수신자(receiver)간에제어메시지(control messages) 교환을통해그룹참여자들을하나의트리로구성한다. 상세하게는그룹의송신자가세션(session) 시작메시지를전체수신자에게전달한후, 제어메시지교환을통해먼저송신자의자식(child) 노드를구하고, 다음에트리에속한노드들이또한그들의자식노드를구하는과정을반복함으로써, 송신자와전체수신자들을하나의다중단계(multiple level) 트리로구성할수 있도록한다. 이로부터본 발명은특히트리구성에소요되는제어메시지양을극소화하여, 대규모네트웍에쉽게적용할수 있으며, 트리구성단계에서개별수신자의특성정보를송신자에게효과적으로전달함으로써, 서비스품질(QoS : quality of service) 보장멀티캐스트데이터전송을가능하게한다.

公开(公告)号：KR1020010039240A

公开(公告)日：2001-05-15

申请号：KR1019990047544

申请日：1999-10-29

Applicant: 한국전자통신연구원

Inventor： 김용운 ,  박정수 ,  고석주 ,  김용진

IPC: G06F13/00

Abstract: PURPOSE: The method for negotiating QoS(Quality of Service) is provided to proceed the stable transceiving of the data without loading the over-traffic to the receiver. CONSTITUTION: Tests if all senders' QoS negotiation ends(S31). If yes, the values of the high quality QoS is summed up as many as tokens used in the negotiation(S32). If the total values of the QoS excesses the value that the resource of the local system can be capable(S33), the number of the token, used in the previous QoS negotiation, is reduced up to the number of the token that the resource of the local system exits(S34).

Abstract translation: 目的：提供用于协商QoS（Quality of Service，服务质量）的方法来进行数据的稳定收发，而不会将过流量加载到接收机。 规定：测试所有发件人的QoS协商结束（S31）。 如果是，高质量QoS的值与协商中使用的令牌相加很多（S32）。 如果QoS的总值超过了本地系统的资源能够达到的值（S33），则在先前的QoS协商中使用的令牌的数目减少到令牌的数量， 本地系统退出（S34）。

公开(公告)号：KR1020000026640A

公开(公告)日：2000-05-15

申请号：KR1019980044267

申请日：1998-10-22

Applicant: 한국전자통신연구원

Inventor： 고석주 ,  이종화 ,  함진호

IPC: H04L12/58

CPC classification number: H04L12/185 ,  H04L45/12 ,  H04L45/16 ,  H04L45/48

Abstract: PURPOSE: A method for forming multi cast tree for a screen conference service through an internet is provided to maximize service quality and to effectively use resources by considering link resources of a network and a transmission retardation when a multi cast node is selected. CONSTITUTION: In a method for forming multi cast tree for a screen conference service through an internet, when a new customer request a connection to a screen conference through a nearest connection node of the internet, a server for the screen conference approves the connection. Then, an optimum multi cast node is selected in accordance with a determining result whether the connection node is included in a current multi cast tree. When the connection node is included in the current multi cast tree, a new multi cast node is selected.

Abstract translation: 目的：提供一种通过互联网形成用于屏幕会议服务的多播树的方法，以在选择多播节点时，通过考虑网络的链路资源和发送延迟来最大化服务质量和有效地使用资源。 构成：在通过互联网形成屏幕会议服务的多播树的方法中，当新客户通过互联网的最近连接节点请求与屏幕会议的连接时，用于屏幕会议的服务器批准该连接。 然后，根据确定结果选择最佳多播节点，连接节点是否包括在当前多播树中。 当连接节点包含在当前多播树中时，选择一个新的多播节点。

公开(公告)号：KR100462406B1

公开(公告)日：2004-12-17

申请号：KR1020020068477

申请日：2002-11-06

Applicant: 한국전자통신연구원

Inventor： 고석주 ,  박주영 ,  강신각

IPC: H04L12/44

CPC classification number: H04L12/1854 ,  H04L12/1836

Abstract: Disclosed herein is a method of constructing and managing an overlay multicast tree on the Internet. The overlay multicast tree includes a sender, one or more receivers and one or more agents for relaying data. At the first step, a new participant requests access to the overlay multicast tree from a tree manager while transmitting network characteristic information thereof to the tree manager. The second step is determining an optimal parent node in consideration of the network character information of the new participant having requested access at the first step and network characteristic information of agents participating in a currently constructed overlay multicast tree, and transmitting information of the determined parent node to the new participant. The new participant establishes data channels on the basis of the information of the determined parent node at the third step.

Abstract translation: 这里公开了一种在互联网上构建和管理覆盖组播树的方法。 覆盖组播树包括发送者，一个或多个接收者以及用于中继数据的一个或多个代理。 在第一步，新参与者请求从树管理器访问覆盖多播树，同时将其网络特征信息发送到树管理器。 第二步是考虑在第一步骤中请求访问的新参与者的网络特征信息和参与当前构造的覆盖组播树的代理的网络特征信息来确定最佳父节点，并且发送所确定的父节点的信息 给新参与者。 新参与者在第三步基于所确定的父节点的信息建立数据信道。

公开(公告)号：KR100450747B1

公开(公告)日：2004-10-01

申请号：KR1020010079678

申请日：2001-12-15

Applicant: 한국전자통신연구원

Inventor： 고석주 ,  강신각 ,  박주영 ,  김은숙

IPC: H04L12/18

Abstract: PURPOSE: A method for managing QoS(Quality of Service) in multicast transmission and a device therefor are provided to collect and manage state information of QoS variables including membership information, data throughput, a data loss rate, transmission delay, etc. CONSTITUTION: Users desiring to get a multicast data service input user IDs to subscribe in a session(110). An information transmitter transmits related session information including multicast addresses and QoS variable information to the users(120). A user authenticator stores the number of session subscribers and distribution information in a QoS state information database(130). A data transmitter transmits data(140). The information transmitter requests the users to periodically report state information of QoS variables(150). A QoS variable unit receives QoS state information report messages(160). The QoS variable unit records session membership and QoS state information in the QoS state information database(170), to adjust a multicast data transfer rate and extract charging information from the QoS state information(180).

Abstract translation: 目的：提供一种用于管理多播传输中的QoS（服务质量）的方法及其设备，用于收集和管理QoS变量的状态信息，包括成员资格信息，数据吞吐量，数据丢失率，传输延迟等。构成：用户 希望获得多播数据服务输入用户ID以在会话中订阅（110）。 信息发送器将包括多播地址和QoS变量信息的相关会话信息发送给用户（120）。 用户认证器将会话订户的数量和分发信息存储在QoS状态信息数据库（130）中。 数据发送器发送数据（140）。 信息发送器请求用户周期性地报告QoS变量的状态信息（150）。 QoS变量单元接收QoS状态信息报告消息（160）。 QoS可变单元在QoS状态信息数据库（170）中记录会话成员资格和QoS状态信息，以调整多播数据传输速率并从QoS状态信息（180）提取计费信息。