Abstract:
PURPOSE: A method and apparatus for flow mobility are provided to support flow mobility without exchanging an additional signaling by interlinking flow information with a binding cache entry. CONSTITUTION: A storage unit(110) stores a flow table, a binding cache entry, and a forwarding table. The flow information of a packet and a flow identifier are mapped and stored on the flow table. The flow identifier and a binding information of the access gateway is mapped and stored on the binding cache entry. The binding information and the output information are mapped and stored on the forwarding table. If the packet is received, a processor(150) transmits the received packet with reference to the flow table, the binding cache entry, and the forwarding table.
Abstract:
PURPOSE: A system software platform of a packet-optical transmission system and an application object management method thereof are provided to reduce a development period and perform the reuse of present source and design by inducing the function development through a component unit development. CONSTITUTION: An entity ID manager(710) gives the individual identifier to the objects of an application operated in the distributed computing environment and an entity ID manager manages. An instance provider(740) supplies the application and generates an instance about a service object according to the request from the application. A naming register stores access interface information about the object and stores the information in naming database.
Abstract:
PURPOSE: A sink node and an operating method thereof are provided to classify detection values in effective ranges by judging the validity of the detected value of each sensor node. CONSTITUTION: A sensor node(100) detects the peripheral information periodically, and transmits a detection value to a sync node(110). A wired/wireless communication unit(112) performs the communication with the sensor node or a cluster head node and a host. For the detection value, a detection value management unit(114) process the detection value according to first and second threshold values for each preset sensor node. A detection value storage unit(116) generates the detection value for each unit time in record.
Abstract:
PURPOSE: A method for calculating a recursive path and managing resources necessary for computation of a multi-layered resource transmission network path and a device therefor are provided to prevent a route computation failure due to shortages of resources in a constant layer. CONSTITUTION: A path calculation engine receives a patch calculation request for transmission service of an N layer. The path calculation engine searches a TE link resource of the N layer based on TE(Traffic Engineering) database. The path calculation engine repeats a route computation request and a route computation request of a lower layer until all route computation is completed.
Abstract:
A control function multiplexing apparatus in a network system and a method thereof are provided to change one selected from a plurality of line cards into a control card, and stably maintain the system by multiplexing the control function of line cards within the system. A plurality of line cards(10,10a,10b,10c) transceive packets through an IO port connected to an external node. A switch(20) controls the forwarding path of the packets through the switching of packets delivered between the line cards, and transmits an IPC message between the line cards for the IPC(Inter Processor Communication) communication. A control function multiplexing apparatus receives a control packet of one selected from the line cards.
Abstract:
A packet transferring method and an apparatus thereof are provided to improve the overall performance of a system by firstly processing applications which require the quick processing by applying the priority to a control packet. A packet receiver(210) classifies inputted packets into data packets and control packets, analyzes L4 protocol of the separated control packets, stores the separated control packets in queues of each protocol, and then assigns the final priority based on the basic priority for each protocol and the priority corresponding to a queuing period. An internal IPC switch(220) delivers the received control packets based on the final priority.
Abstract:
An apparatus for testing the operation of an Ethernet-based APS process and a method thereof are provided to be utilized in case a special response which deviates from operational principles of the existing APS process is needed. An apparatus for testing the operation of an APS process comprises the followings: a received signal filtering portion(310) which filters a test instruction signal for commanding to test the operation of the APS process in the first node and the second test response signal for showing that the operation of the APS process in the second node is normal, and then generates the first test response signal for showing that the operation of the APS process in the first node is normal; a highest priority part request selection part(320) which selects the highest priority part request signal; and an output signal deciding unit(332) which determines a output signal to be transmitted to the second node.
Abstract:
An optical modulator, a method and an apparatus for controlling a bias voltage of the optical modulator are provided to control bias voltages of two optical modulators efficiently through feedback control of the bias voltages according to detection of a fourth harmonic signal to maintain final output characteristic with stability. An optical modulating device includes a light generator(11), a first optical modulator(12), a second optical modulator(13), and a bias controller. The first optical modulator turns on/off light generated by the light generator according to a reference clock signal to modulate the light into an optical pulse signal with a predetermined period. The second optical modulator turns on/off the optical pulse signal output from the first optical modulator according to data to be modulated to modulate the optical pulse signal into an optical output signal with the data loaded thereon. The bias controller applies a first low-frequency RF signal with a first bias voltage to the first optical modulator, applies a second low-frequency RF signal with a second bias voltage to the second optical modulator, detects a fourth harmonic component of the first RF signal from the optical output signal of the second optical modulator and controls the first bias voltage and the second bias voltage such that the fourth harmonic component has a minimum current.
Abstract:
본 발명은 분산 포워딩 구조의 라우터 시스템 및 그의 포워딩 제어방법에 관한 것으로서, 상기 라우터 시스템은 다수의 라인카드들과 라우터 프로세서를 포함하고 상기 라우터 프로세서의 장애 발생으로 인해 라우터 프로세서와 라인카드간 연결 해제시 라인카드가 기 저장된 제1 포워딩 테이블을 유지하면서 상기 라우터 프로세서로부터의 접속을 대기하고 장애 복구된 라우터 프로세서의 접속 요청에 응답하여 라인카드가 상기 제1 포워딩 테이블의 엔트리 정보를 라우터 프로세서에게 전달하고 라인카드로부터 전달된 제1 포워딩 테이블의 엔트리 정보와 상기 라우터 프로세서에서 새롭게 생성된 제2 포워딩 테이블의 엔트리 정보를 비교하여 상기 제1 포워딩 테이블을 상기 제2 포워딩 테이블과 일치시키는 과정을 수행한다. 본 발명은 라우터 프로세서의 장애 발생시에도 중단없이 포워딩을 제어할 수 있으며 장애 복구 후에도 최신의 포워딩 정보를 이용하여 정확한 포워딩이 가능한 장점이 있다. 분산 포워딩 구조의 라우터, 포워딩, 라우터, 장애, 복구
Abstract:
1. 청구범위에 기재된 발명이 속한 기술분야 본 발명은 이중화된 스위치 보드의 이중화 제어장치 및 그 방법에 관한 것임. 2. 발명이 해결하려고 하는 기술적 과제 본 발명은 통신(Telecom) 사업자들의 ATCA(Advanced Telecommunications Computer Architecture) 표준 플랫폼 규격에 호환됨으로서 ATCA 규격을 따르는 쉘프(Shelf)나 백플레인을 교체하여도 추가적인 보드 수정 또는 제작을 하지 않고서 동일한 스위치 보드의 재사용이 가능한 스위치 보드의 이중화 제어장치 및 그 방법을 제공하는데 그 목적이 있음. 3. 발명의 해결방법의 요지 본 발명은 상기 이중화된 스위치 보드 중 어느 하나에 입력되는 데이터를 목적지 라인카드에 스위칭하기 위한 스위칭수단; 상기 이중화된 스위치 보드 중 상대 스위치 보드의 클럭 상태를 제어하기 위한 상태제어수단; 상기 통신용 네트워크 시스템의 플랫폼상의 IPC(Inter Processor Communication) 통신을 제어하기 위한 IPC 제어수단; 상기 이중화된 스위치 보드상의 상기 IPC 제어수단 및 상태제어수단을 제어하기 위한 프로세싱수단; 및 상기 이중화된 스위치 보드간에 클럭 동기를 맞추기 위한 클럭제어수단을 포함한다. 4. 발명의 중요한 용도 본 발명은 통신 시스템 등에 이용됨. 스위칭, 패킷 스위치, 이중화 제어장치, 스위치 보드 이중화, ATCA, IPC(Inter Processor Communication)