Abstract:
회선 트래픽과 패킷 트래픽을 패킷 교환망에서 통합하여 전달하는데 있어서, 기존 패킷 데이터 망과 호환성을 유지하면서 패킷 트래픽을 보다 효율적으로 처리하는 계층적 플로우 동적 관리 방법 및 장치가 개시된다. 본 발명의 계층적 플로우 동적 관리 방법은, 데이터 패킷을 수신하고, 수신된 데이터 패킷의 속성에 따라 상기 데이터 패킷을 분류하여 1단계 플로우를 생성하는 단계; 상기 분류된 각각의 플로우의 트래픽이 미리 설정된 제한 대역을 초과하는지의 여부를 판단하고, 제한대역초과된 플로우에 대해 각 플로우별 정책에 따라 패킷 폐기절차를 수행하거나 2단계 플로우를 생성하는 단계; 및 상기 2단계 플로우에 대해 2단계 플로우 정책에 따라 제2단계 플로우 처리를 수행하는 단계를 포함하는 것을 특징으로 한다. 이에 의해 대역을 초과하는 플로우 또는 폭주를 발생시키는 플로우에 대해서만 플로우를 다시 계층적으로 세분화하여 관리하기 때문에 복잡한 연산없이 세밀하게 플로우를 관리할 수 있다. 플로우, 트래픽, 관리
Abstract:
A time synchronization system and a method on the network are provided to reduce power consumption and calculation of a slave clock device by compensating for a time deviation of the slave clock device. A master clock transmits a time sync signal including first time(t1) information at which the master clock apparatus(100) transmits the time sync signal is periodically. The master clock device transmits time information signal including a fourth time(t4) information at which the master clock device according to the time information request signal from the slave clock device. A slave clock device(200) receives a time sync signal which is activated periodically or not when the clock of the slave clock device is need to be repaired. The slave clock device stores the second time(t2) information at which the time sync signal is received and transmits time request signal to the mast clock device. The slave clock device receives the response signal from the master clock device and stores the third time(t3) information at which time information request signal is stored. The slave clock device is synchronized by using the information of first time and the fourth time information.
Abstract:
A method and a system for controlling a band in a subscriber network are provided to maintain switching throughput of an output band at almost maximum capacity by periodically or non-periodically recalculating a currently-applied limit band range according to the number of registered subscribers. If guarantee band class information by subscriber and limit band class information are updated in a subscriber network, increase and decrease of the number of subscribers designated according to each information and total usage band of the subscriber network are analyzed to newly determine the limit band by subscriber(S32,S33). On the basis of the determined limit band information, the amount of input traffics from each subscriber is controlled(S34).
Abstract:
본 발명에 따른 티디엠 회선 트래픽과 아이피 데이터 트래픽을 인터페이스하는 장치는, 접속된 소정의 라인카드에서 처리되는 프레임을 설정된 다른 라인카드에 송신하기 위한 스위치 패브릭부; 수신된 이더넷프레임에 부여된 VLAN ID에 대응하는 출력라인카드와 출력포트를 설정하여 상기 프레임을 전송하고, 또한 이더넷 프레임에 포함된 VLAN ID에 대응하는 해당 출력포트를 통하여 IP 데이터 트래픽으로 전송하는 이더넷 패킷 인터페이스 카드; 및 수신된 SDH/SONET 프레임에서 추출한 이더넷 프레임에 부여된 VLAN ID에 대응하는 출력라인카드와 출력포트를 설정하여 상기 프레임을 전송하고, 또한 상기 스위치 패브릭부를 통하여 수신된 프레임을 해당 VLAN ID에 상응하는 VC(Virtual Concatenation) ID를 갖는 SDH/SONET 프레임에 포함시켜 TDM 회선으로 전송하는 TDM 패킷 인터페이스 카드;를 포함함을 특징으로 한다. 본 발명은 TDM 회선 트래픽 인터페이스와 IP 데이터 트래픽 인터페이스간에 프레임을 Port-based VLAN 방식을 적용함으로써 각 트래픽간에 서로 다른 인터페이스를 연결하기 위한 별도의 복잡한 장치를 구비함이 없이 효과적으로 프레임을 전송할 수 있다.
Abstract:
PURPOSE: An optical buffer is provided to alternately install many optical delayers and optical reflectors, and to pass light through the optical layers and the optical reflectors, then to delay light of a desired wavelength as much as desired time, thereby preventing optical packets from colliding with each other. CONSTITUTION: An optical circulator(32) has at least 3 ports, outputs light incident on the first port to the second port, and outputs light incident on the second port to the third port. Many optical reflectors(33a-33n) are connected to the second port, have different central wavelengths, reflect light of the substantially same wavelength as a self central wavelength among incident lights, and output the reflected light toward the second port. Many optical delayers(34a-34n) are installed by turns with the optical reflectors(33a-33n), and delay the light incident from each of the optical reflectors(33a-33n). An optical converter(31) converts light of an optional wavelength into central wavelengths of the optical reflectors(33a-33n), and outputs the converted light to the first port.
Abstract:
PURPOSE: An optical buffer is provided to alternately install many optical delayers and optical reflectors, and to pass light through the optical layers and the optical reflectors, then to delay light of a desired wavelength as much as desired time, thereby preventing optical packets from colliding with each other. CONSTITUTION: An optical circulator(32) has at least 3 ports, outputs light incident on the first port to the second port, and outputs light incident on the second port to the third port. Many optical reflectors(33a-33n) are connected to the second port, have different central wavelengths, reflect light of the substantially same wavelength as a self central wavelength among incident lights, and output the reflected light toward the second port. Many optical delayers(34a-34n) are installed by turns with the optical reflectors(33a-33n), and delay the light incident from each of the optical reflectors(33a-33n). An optical converter(31) converts light of an optional wavelength into central wavelengths of the optical reflectors(33a-33n), and outputs the converted light to the first port.
Abstract:
PURPOSE: A controller structure of an optical burst switching network is provided to introduce offset time for data transmitted through a channel on a WDM optical link, thereby minimizing setup time without buffering a data burst and magnifying bandwidth efficiency. CONSTITUTION: A header packet transceiver(602) extracts header information from burst CCG(Control Channel Group) data, and capsulates the rest burst CCG data in Ethernet frame. A packet frame generator(603) generates new header information, and makes CCG data to be transmitted. A multiple forwarder(604) obtains output port number information and output label information from which the made CCG data are outputted, and transmits the obtained information to an electric switch matrix. A multiple scheduler(606) extracts burst length information from the burst CCG data, determines switching time and start time of a header packet, and buffers the burst CCG data to transmit the data. A multiple burst header packet transmitter(608) reads the CCG data, and transmits the CCG data. A switching controller(607) transmits a control signal. An E/O(Electric to Optical) converter(609) converts the CCG data into an optical signal.