Abstract:
In a looped-bus type network, in case of a node error, an optical switching apparatus passes a service data in order to not receive an influence of an error node, and normally maintains a service data path. The light switching apparatus includes: a previous node input signal optical distributing unit(10) for dividing a data optical power with a ratio N:M; a present node input signal optical distributing unit(20) for dividing a data optical power from a present node/terminal; a node error monitoring/switching controller(30) for monitoring a distributed optical signal of 10% from the unit(10), and generating an optical switch control signal; a previous node optical signal controller(40) for controlling a distributed optical signal of N% from the unit(10); a present node controller(50) for controlling a distributed optical signal of 90% from the unit(20); and a optical signal connector(60) for interconnecting the optical signals from the controllers(40,50).
Abstract:
본 발명은 개념적인 장애 복구 방법을 광대역 종합정보 통신망(B-ISDN)에 적용된 ATM 링에 적용하여 장애 발생시 실시간 선로 절체를 수행하도록 하기 위한 비동기식 전송 모드(ATM) 링 노드 장치에 관한 것으로, 본 발명은 운용라인 수신 물리매체 정합부; 운용라인 송신 물리매체 정합부; ITU-T SG.13에서 권고하고 있는 물리계층 기능을 수행하는 물리계층1부 및 물리계층2부; 상기 물리계층부에서 제공되는 서비스 셀 데이타를 ATM 계층으로 라우팅하는 선로 절체부; ATM 계층 기능을 수행하는 ATM 계층부; AAL 또는 상위 프로토콜을 수행하는 상위계층부 및 망 또는 가입자와 연결을 위한 프로토콜을 수행하는 망/가입자 접속부를 포함하여 구성되는 것을 특징으로 한다.
Abstract:
Disclosed are a method for transferring an emergency traffic in a software defined networking network and an apparatus performing the same. The method for transferring the emergency traffic in an open flow control device generates an emergency code for transferring the emergency traffic if an emergency state belonging to a predefined type occurs; transmits the generated emergency code to a first open flow switch connected to a transmission terminal transmitting the emergency traffic; and transmits a message for commanding update of the emergency code to at least one open flow switch included in a transferring path of the emergency traffic, thereby making each open flow switch recognize and transfer the emergency traffic. Thus, the method can efficiently transfer the emergency traffic in the software defined networking network.
Abstract:
Disclosed are a method for providing a quality of service (QoS) in a software-defined networking based network and an apparatus thereof. The method for providing the QoS comprises the steps of searching for forwarding information and QoS rule information corresponding to a first packet of a received predetermined flow in a forwarding table and a QoS rule table, respectively; transmitting the packet to a controller if the forwarding information and the QoS rule information do not exist in the forwarding table and the QoS rule table; and generating a flow entry corresponding to the packet in a flow learning table based on the forwarding information and the QoS rule information that are received from the controller, thereby efficiently providing the QoS.
Abstract:
The present invention provides a device and a method for providing a content and a system for providing a content which transmits a content in a completely distributed structure by maintaining a compatibility with an IP network and excluding content synchronization and request routing process for transmitting the content. The provided system includes: a user terminal for requesting a content; a first content providing device for determining if a content is stored when a request for the content is received and transmitting the stored content to the user terminal when the content is stored; and a second content providing device which comprises a cluster with the first content providing device for determining if the content is stored according to a request of the first content providing device when the content is not stored in the first content providing device and transmitting the content to the user terminal through the first content terminal when the content is stored.
Abstract:
PURPOSE: A method and a system for measuring the network quality for each section of a real time multimedia service are provided to verify a network in which quality deterioration is generated. CONSTITUTION: A plurality of delay time measurement devices(112, 122) is connected to each network(110, 120) under a heterogeneous network interlocking environment. Based on a real time transport control protocol packet between the transmission terminal and the receiving terminal of each network, a transport delay time is measured by delay time measurement units. A quality measurement device(130) searches a network in which quality deterioration is generated.
Abstract:
A method for transmitting a user profile in a web browsing service and an apparatus thereof are provided to offer the web browsing service which is suitable for the environment of a user by using the device profile of a terminal and the user profile. A device profile receiver(200) receives a device profile from a web client(10) receiving a web browsing service. A profile transmitter(210) transmits the received device profile and user profile to a web browsing service providing device(40). A profile receiver receives the device profile and user profile. A reconfiguring unit reconstructs web contents to be provided to the web client.
Abstract:
트래픽 측정 시스템 및 그의 트래픽 분석 방법이 개시된다. 본 발명에 따른 트래픽 측정 시스템은 인터넷 회선에 흐르는 모든 패킷을 수집하고, 수집된 패킷에서 트래픽 분석에 필요한 정보만을 추출하고, 추출된 정보를 소정의 플로우 형태로 가공하는 다수의 측정장치 및 다수의 측정장치들 각각에서 전달되는 트래픽 정보를 상호연계 분석하여 트래픽의 응용을 식별하고, 식별된 응용을 소정의 트래픽 유형으로 분류하여 그 결과를 출력하는 분석서버를 포함하는 것을 특징으로 하며, 인터넷망에서 트래픽을 측정하고 이를 가공하여 상세한 응용별 트래픽 통계자료를 생성할 수 있다. 특히, 다지점의 측정자료를 동시에 고려하여 분석하고, IP 패킷의 페이로드에 포함된 응용의 헤더로부터 응용을 식별할 수 있는 자료를 실시간으로 추출함으로써 상세한 트래픽 분석결과를 제공할 수 있다.
Abstract:
PURPOSE: A method for performing TE(Traffic Engineering) by using simulation and optimization in multi-protocol label switching network, and a server therefor are provided to allow a network manager to effectively devise TE policy. CONSTITUTION: An input processor(31) receives every value inputted by a user. A router interface(32) obtains every data obtained from switches. A simulation logic(33) is a part where simulation techniques are actually implemented. An optimization logic(34) is a part where optimization techniques are actually implemented. A data manager(35) stores and loads every input and output data used for simulation and optimization and their meta data. A result output unit(36) reports the simulation and optimization result to a manager by a report or through a GUI(Graphical User Interface). A result application unit(37) generates a substantial TE command, applies it to a network and checks its result, in automatically reflecting the simulation and optimization result in the network through a server.