公开(公告)号：KR100558114B1

公开(公告)日：2006-03-10

申请号：KR1020010043077

申请日：2001-07-18

Applicant: 한국전자통신연구원 ,  주식회사 케이티

Inventor： 윤현정 ,  전병천 ,  이유경

IPC: H04L12/771

Abstract: 본 발명은 ATM 스위칭 및 라우팅 시스템에 관한 것으로, ATM 스위칭 기능 및 IP 라우팅 기능을 함께 수행할 수 있는 스위칭/라우팅 장치에 있어서, ATM 스위치의 가입자 정합부의 복수개의 포트 중 복수개의 특정 포트의 물리계층(PHY)과 ATM 인터페이스 모듈(AIM)사이에 각각 장착되어 분산형 분포로 배치되어 있는 복수개의 포워딩 엔진(FE); 및 상기 포워딩 엔진(FE)을 제어하는 제어수단을 포함하고, 상기 복수개의 포워딩 수단은 서로 가상 경로(VP) 풀 메쉬 연결을 통해 데이터 교환을 하는 것을 특징으로 하여, ATM 스위칭과 IP 라우팅을 동시에 처리하고 가입자 정합부에 포워딩 엔진을 선택적으로 부가하여 대용량의 라우터나 엠피엘에스(MPLS ; Multi Protocol Label Switch) 시스템으로 활용할 수 있다는 효과가 있다.
ATM 스위칭, IP 라우팅, 포워딩 엔진, ATM 스위치 기반 라우팅

公开(公告)号：KR100479262B1

公开(公告)日：2005-03-31

申请号：KR1020020062252

申请日：2002-10-12

Applicant: 한국전자통신연구원

Inventor： 석주명 ,  박미룡 ,  강현주 ,  최길영 ,  이규호 ,  이종협 ,  이유경

IPC: H04L12/66

Abstract: 본 발명은 통합 랜 호 제어 시스템에 관한 것으로, 상기 통합 랜 호 제어 시스템은, 통합 랜 호 제어 시스템 전체에 대한 전반적인 제어를 수행하는 관리 조정기; 각각의 브이오아이피 프로토콜에 따른 다양한 호 연결 절차를 범용화하여 관리하는 호 조정기; 상기 통합 랜 호 제어 시스템에서 사용되는 정보를 저장 및 관리하는 기능 및 사용자 인증 관련 기능을 수행하는 저장소 조정기; 및 상기 통합 랜 호 제어 시스템에서 지원되는 복수 개의 브이오아이피 프로토콜 드라이버들을 통합하여 관리하는 프로토콜 조정기를 포함한다.

公开(公告)号：KR100453816B1

公开(公告)日：2004-10-20

申请号：KR1020020031059

申请日：2002-06-03

Applicant: 한국전자통신연구원 ,  주식회사 케이티

Inventor： 윤호선 ,  윤현식 ,  양선희 ,  이유경

IPC: H04L12/28

Abstract: PURPOSE: A device for supporting a high reliable MPLS(Multi Protocol Label Switching)-VPN(Virtual Private Network) service and a method therefor are provided to simultaneously use one LSP(Label Switched Path) in many VPN groups, thereby remarkably reducing the number of LSPs and flowing traffic into a new alternative path. CONSTITUTION: A subscriber interface setup unit(46) sets a subscriber interface on a front of an ingress forwarding engine(41) or on a back of an egress forwarding engine(44). An LSP setup unit(47) for a high reliable MPLS-VPN sets an internal channel for LSPs in a switch(45). The subscriber interface setup unit(46) comprises as follows. An MPLS-VPN service packet determiner determines packets for receiving an MPLS-VPN service. If the determined packets are in the same group, a group channel setup unit sets an internal channel for connecting the packets to an ingress VC merging unit(42). An internal channel setup unit sets an internal channel for connecting the packets to the ingress VC merging unit(42).

Abstract translation: 目的：提供一种用于支持高可靠性MPLS（多协议标签交换）-VPN（虚拟专用网络）服务的设备及其方法，以便在许多VPN组中同时使用一条LSP（标签交换路径），从而显着地减少了数量 的LSP和流量进入一条新的替代路径。 构成：用户接口设置单元（46）在入口转发引擎（41）的前面或在出口转发引擎（44）的后面设置用户接口。 用于高可靠性MPLS-VPN的LSP建立单元（47）为交换机（45）中的LSP设置内部信道。 用户接口设置单元（46）包括如下。 MPLS-VPN业务报文确定器确定用于接收MPLS-VPN业务的报文。 如果所确定的分组在同一组中，则组信道设置单元设置用于将分组连接到入口VC合并单元（42）的内部信道。 内部信道设置单元设置用于将分组连接到入口VC合并单元（42）的内部信道。

公开(公告)号：KR100440587B1

公开(公告)日：2004-07-19

申请号：KR1020020031366

申请日：2002-06-04

Applicant: 한국전자통신연구원

Inventor： 조재형 ,  이계선 ,  전병천 ,  이유경

IPC: H04L12/18

Abstract: PURPOSE: A multicast service method in an MPLS(Multi Protocol Label Switching) network is provided to eliminate the consumption of resources due to path establishment by making all groups share a previously established LSP(Label Switched Path), instead of forming a distribution tree for each group. CONSTITUTION: A BSR(BootStrap Router), the highest priority node among RP(Rendezvous Point) nodes, broadcasts an integrated, certified bootstrap message to the RP nodes periodically, and the RP nodes broadcast bootstrap messages to their respective LERs(Label Edge Routers)(101). Subscriber terminals transfer join messages to RP nodes through LERs respectively. The LERs and the RP nodes get to a group data forwarding state and a multicast forwarding state respectively by the transmitted join messages(102). If a packet is received from an arbitrary subscriber terminal to an adjacent LER(103), the LER analyzes the header of the received IP packet(104). Based on RP information delivered from the bootstrap message, the LER transfers the packet to an RP node appointed to service a group specified as the destination of the packet(105). The RP node reproduces the transferred multicast data packet as much as the number of LERs to which the members of the group are connected and delivers them to the LERs through an LSP(106). Each LER reproduces the delivered packet as much as the number of group members in an external network and delivers them to the subscriber terminals(107).

Abstract translation: 目的：提供MPLS（多协议标签交换）网络中的多播服务方法，以通过使所有组共享先前建立的LSP（标签交换路径）来消除由于路径建立而导致的资源消耗，而不是形成用于 每组。 构成：RP（Rendezvous Point）节点中的最高优先级节点BSR（BootStrap Router）周期性地向RP节点广播集成的，经过验证的自举消息，RP节点将自举消息广播到它们各自的LER（标签边缘路由器） （101）。 用户终端分别通过LER将加入消息转发给RP节点。 LER和RP节点通过发送的加入消息分别达到组数据转发状态和组播转发状态（102）。 如果从任意用户终端接收到分组到相邻LER（103），则LER分析接收到的IP分组的报头（104）。 基于从引导消息传送的RP信息，LER将分组传送到被指定为服务指定为分组的目的地的组的RP节点（105）。 RP节点再现所传送的组播数据包的数量与该组成员所连接的LER的数量一样多，并通过LSP将它们递送给LER（106）。 每个LER再现与外部网络中的组成员数量一样多的分发的分组，并将它们传送给用户终端（107）。

公开(公告)号：KR1020040035903A

公开(公告)日：2004-04-30

申请号：KR1020020062250

申请日：2002-10-12

Applicant: 한국전자통신연구원

Inventor： 강현주 ,  박미룡 ,  석주명 ,  최길영 ,  이규호 ,  이유경

IPC: H04L12/28

CPC classification number: H04L65/1006 ,  H04L65/1069 ,  H04W80/10

Abstract: PURPOSE: A method for processing a call request with bifurcation by using an SIP(Session Initiation Protocol) and a call processor thereof are provided to reliably manage a call state and quickly respond to a call request by performing a forking operation once an OK response message is received from one bifurcated call without waiting for a message from the other bifurcated call. CONSTITUTION: A forking proxy core engine(111) manages call state as well as transaction state and especially manages call state information on forking. When an event is received and if it is a non-stored request message, the forking proxy core engine(111) creates a user agent server(113) and determines whether the message is to be forked. If the event is a previously stored request message, the forking proxy core engine(111) processes the message according to a state of the user agent server(113) or a user agent client. If the event is a response message to a call request, the forking proxy core engine(111) stores it in a forking storage unit(112) or processes it without storing it according to a state code of the response message to a bifurcated message. A session managing module(110) searches the forking storage forking storage unit(112) and reads information on whether to operate a user agent client to the end.

Abstract translation: 目的：提供一种通过使用SIP（会话发起协议）和其呼叫处理器来处理具有分支的呼叫请求的方法，以便可靠地管理呼叫状态并且一旦OK响应消息执行分叉操作就可以快速响应呼叫请求 从一个分叉的呼叫接收，而不等待来自其他分叉呼叫的消息。 构成：代理核心引擎（111）管理呼叫状态和事务状态，特别是管理分路上的呼叫状态信息。 当接收到事件并且如果它是非存储的请求消息时，分支代理核心引擎（111）创建用户代理服务器（113）并且确定该消息是否要被分叉。 如果事件是先前存储的请求消息，则分支代理核心引擎（111）根据用户代理服务器（113）或用户代理客户端的状态处理该消息。 如果事件是对呼叫请求的响应消息，则分叉代理核心引擎（111）将其存储在分叉存储单元（112）中，或者根据响应消息的状态码将其处理而不将其存储到分支消息。 会话管理模块（110）搜索分支存储分支存储单元（112），并且读取关于是否操作用户代理客户端的信息。

公开(公告)号：KR1020040019129A

公开(公告)日：2004-03-05

申请号：KR1020020049387

申请日：2002-08-21

Applicant: 한국전자통신연구원

Inventor： 김미희 ,  이종협 ,  이유경

IPC: H04L12/28

CPC classification number: H04L45/502 ,  H04L12/4641 ,  H04L45/04 ,  H04L45/302 ,  H04L45/507

Abstract: PURPOSE: A method for setting an L2VPN(Layer 2 Virtual Private Network) bidirectional tunnel supporting a QoS function and distributing configuration information by using scalability of an LDP(Label Distribution Protocol) is provided to supply a VC connection with a tunnel connection by using an MPLS(Multi Protocol Label Switching) technology, and to supply an L2VPN control function in order to give a transparent LAN service, thereby implementing an easy setup and efficiency. CONSTITUTION: A PE(Provider Edge) 3(43) sets an additional CE(Customer Edge) 31(44), and sets a layer 2 connection between the PE 3(43) and the CE 31(44)(401). The PE 3(43) requests information on other PEs(402), and obtains information on a PE 1(41) and a PE 2(42)(403). If the PE 3(43) transmits a label mapping-request message to the PE 1(41)(404), the PE 1(41) sets a unilateral tunnel connection(405). The PE 3(43) checks whether a basic session exists, and if not, the PE 3(43) sets a new session and transmits a label mapping-request message to the PE 2(42)(406). The PE 2(42) sets the unilateral tunnel connection with the PE 3(43)(407). The PE 1(41) transmits a label mapping message to the PE 3(43)(408). The PE 3(43) sets the unilateral tunnel connection to the PE 1(41)(409). The PE 2(42) transmits a label mapping message to the PE 3(43)(410). The PE 3(43) sets a unilateral tunnel connection to the PE 2(42)(411).

Abstract translation: 目的：提供支持QoS功能并通过使用LDP（标签分发协议）的可扩展性分发配置信息的L2VPN（第2层虚拟专用网络）双向隧道的方法，以通过使用隧道连接为VC连接提供隧道连接 MPLS（Multi Protocol Label Switching，多协议标签交换）技术，提供L2VPN控制功能，提供透明的局域网服务，实现简单的设置和效率。 规定：PE（提供者边缘）3（43）设置附加的CE（客户边缘）31（44），并且在PE 3（43）和CE 31（44）（401）之间设置层2连接。 PE3（43）请求关于其他PE（402）的信息，获取关于PE1（41）和PE2（42）（403）的信息。 如果PE 3（43）向PE 1（41）（404）发送标签映射请求消息，则PE 1（41）设置单方隧道连接（405）。 PE 3（43）检查是否存在基本会话，如果不存在，则PE 3（43）设置新的会话并向PE 2（42）发送标签映射请求消息（406）。 PE2（42）设置与PE 3（43）（407）的单边隧道连接。 PE1（41）向PE 3（43）（408）发送标签映射消息。 PE 3（43）设置到PE 1（41）（409）的单向隧道连接。 PE2（42）向PE 3（43）（410）发送标签映射消息。 PE 3（43）设置到PE 2（42）（411）的单向隧道连接。

公开(公告)号：KR1020030042800A

公开(公告)日：2003-06-02

申请号：KR1020010073584

申请日：2001-11-24

Applicant: 한국전자통신연구원 ,  주식회사 케이티

Inventor： 박재형 ,  전병천 ,  이유경

IPC: H04L12/745

CPC classification number: H04L45/00 ,  H04L45/742

Abstract: PURPOSE: A method for performing a parallel forwarding lookup process is provided to forward packets through many parallel lookup engines, in order to reduce lookup time, and to perform a forwarding lookup in parallel by using a prefix tree, thereby improving forwarding lookup performance in a packet switched router. CONSTITUTION: Information on a lookup-key searching for all lookup engines is supplied(1410). Checkers decide whether the lookup-key exists in a self lookup engine(1420). If so, controllers search a prefix tree, and return information on a desirous key to a selector(1430). The selector selects a prefix having the longest length among values returned from each lookup engine(1440), and outputs the selected prefix value as a lookup result of a forwarding engine(1450).

Abstract translation: 目的：提供一种用于执行并行转发查找过程的方法，用于通过许多并行查找引擎转发数据包，以减少查找时间，并通过使用前缀树来并行执行转发查找，从而提高转发查找性能 分组交换路由器。 构成：提供了查询键搜索所有查找引擎的信息（1410）。 检查者决定查找键是否存在于自我查找引擎中（1420）。 如果是这样，控制器将搜索一个前缀树，并将一个想要的密钥返回给选择器（1430）。 选择器选择从每个查找引擎（1440）返回的值中具有最长长度的前缀，并且输出所选择的前缀值作为转发引擎（1450）的查找结果。

公开(公告)号：KR100346791B1

公开(公告)日：2002-08-01

申请号：KR1019990034517

申请日：1999-08-20

Applicant: 한국전자통신연구원

Inventor： 최길영 ,  강훈 ,  이유경

IPC: H04L12/28

Abstract: 본발명은다중엔터티를위한연결구분자룩업테이블관리방법에관한것으로서, 연결형서비스를제공하는다수의엔터티가하나의연결제공디바이스를공유하는기능구조에서계층간에서연결을구분하기위해검색이용이한형태의별도의다수연결구분자(CID)를검색이용이한형태의연결구분자로정의한후 단순한배열형태의룩업테이블을구성하고, 경로검색및 추가정보를얻기위해상기 CID를룩업테이블의인덱스로사용하여제어함으로써, 해당엔터티로의고속라우팅과그 역과정이효율적으로수행되게할 수있는효과를갖는다.

公开(公告)号：KR1020020036464A

公开(公告)日：2002-05-16

申请号：KR1020000066638

申请日：2000-11-10

Applicant: 한국전자통신연구원 ,  주식회사 케이티

Inventor： 김숙연 ,  정민영 ,  양선희 ,  이유경

IPC: H04L12/28

CPC classification number: H04L45/302 ,  H04L45/24 ,  H04L45/50

Abstract: PURPOSE: A path protecting method for securing a service quality with respect to traffic flows between routers in a multi protocol label switching network is provided to increase a resource application rate of a network and a service availability by recovering a CR-LSP(Constraint-based Label Switched Path) rapidly through a previous protection path set in case that a network has a trouble, thereby securing a QoS(Quality of service) condition when the QoS condition with respect to a set of a traffic flow between two LER(Label Edge Router)s is provided in an MPLS(Multi Protocol Label Switching) network. CONSTITUTION: A set(S) of a CR-LSP for satisfying a QoS condition with respect to traffic flows between a pair of LERs is set(201). The CR-LSP set(S) is provided for using all CR-LSPs as an operation path and using an interactive protection path, respectively. A CR-LSP having a trouble out of all CR-LSPs possessed in the CR-LSP set(S) is detected(202), and a transmission of a traffic flow is performed(203) until transmissions of all traffic flows are completed through only normal CR-LSPs(204). If the transmission is completed, the set CR-LSP set(S) is released(205).

Abstract translation: 目的：提供一种用于保证多协议标签交换网络中路由器之间的业务流量的业务质量的路径保护方法，以通过恢复CR-LSP（基于约束的）来增加网络的资源应用速率和服务可用性 标签交换路径）快速地通过在网络有故障的情况下设置的先前保护路径，从而在相对于两个LER（标签边缘路由器）之间的业务流集合的QoS条件时确保QoS（服务质量）条件 ）s被提供在MPLS（多协议标签交换）网络中。 构成：设置用于满足关于一对LER之间的业务流的QoS条件的CR-LSP的集合（S）（201）。 提供CR-LSP集合（S），用于分别使用所有CR-LSP作为操作路径并使用交互式保护路径。 检测出在CR-LSP集合（S）中拥有的所有CR-LSP中具有故障的CR-LSP（202），并且执行业务流的传输（203），直到所有业务流的传输完成为止 只有正常的CR-LSP（204）。 如果发送完成，则释放设置的CR-LSP组（S）（205）。

公开(公告)号：KR100310303B1

公开(公告)日：2001-09-28

申请号：KR1019990061178

申请日：1999-12-23

Applicant: 한국전자통신연구원

Inventor： 최병철 ,  정연쾌 ,  최창식 ,  이유경

IPC: H04L12/28

Abstract: 1. 청구범위에기재된발명이속한기술분야 MPLS 망의에지라우터에서의고속인터넷프로토콜헤더의룩업제어장치 2. 발명이해결하려고하는기술적과제 CPU를사용하지않고, 하드웨어기반의룩업제어회로를사용하여, 룩업처리효율을향상시키고자함. 3. 발명의해결방법의요지수신된패킷의유형및 에러검사와수신된패킷의헤더및 레이블을추출하는수단; 룩업수행을위한제어신호와 IP 주소를룩업수행장치로제공하는룩업데이타/제어신호발생수단; 룩업수행의결과로인덱스를수신하여, 상기인덱스에대응되는레이블정보를레이블정보테이블로부터페치하는수단; 및상기페치된레이블정보를이용해송신패킷의헤더포맷에맞추어재정렬하여전송하는수단을포함. 4. 발명의중요한용도멀티프로토콜레이블스위칭망의에지라우터에이용됨.