Abstract:
OLT 또는 ONU가복수의파장을이용하여복수의프레임을병렬로전송하는경우, OLT 또는 ONU는복수의프레임을전송하는순서가변경되지않도록복수의프레임들이출력되는시간간격을조절할수 있다. 따라서, 복수의프레임을수신하는 ONU 또는 OLT는프레임을수신하는순서에따라복수의프레임의순서를용이하게재정렬할수 있다. 따라서, 프레임에프레임의순서를표시하는별도의정보를포함시키지않으면서, 다중파장을사용하는 EPON을용이하게구현할수 있다.
Abstract:
본 발명은 착탈형 광 트랜시버로, 전기 신호를 광신호로 광전변환하여 송신하는 광송신 어셈블리와, 광신호 입력을 전기 신호로 변환하여 출력하는 광 수신 어셈블리를 포함하는 광학부와, 호스트 보드로부터 입력되는 전기 신호를 증폭하여 상기 광송신 어셈블리에 출력하고, 상기 광수신 어셈블리로부터 출력되는 전기 신호를 증폭하여 상기 호스트 보드에 출력하는 보드 전자 회로부를 포함하되, 상기 광학부와 전자 회로부가 각각 별도의 하우징들로 분리 구성되고, 각각의 하우징들에 생성된 결합부들에 의해 광학부와 전자 회로부가 착탈된다.
Abstract:
Disclosed are a method for allocating upstream bandwidth resources and a method for transmitting uplink data in an orthogonal frequency division multiplexing-passive optical network. The method for allocating the upstream bandwidth resources according to an embodiment of the present invention comprises the steps of: receiving information of a queue state from optical network devices; and allocating upstream bandwidth resources by providing a two dimensional upstream bandwidth map, which is composed of a subcarrier and a time resource through a frame synchronized in a certain period based on the information of the queue state received from each optical network device, to each optical network device.
Abstract:
Disclosed is a technology for an orthogonal frequency division multiple access-passive optical network. The orthogonal frequency division multiple access-passive optical network, according to an embodiment of the present invention, includes a plurality of optical network units, each of which is configured to generate orthogonal frequency division multiplexed signals allocated based on a central frequency for frequency division multiplexing allocated in advance; and uses the generated signals in upstream transmission.
Abstract:
The present invention provides a flow based connection admission control method for efficiently using a limited bandwidth to provide an uninterruptible connection over the internet. The present invention comprises: a flow information storage part including flow information and band management information; and a controller allocating a flow identification number for discriminating packets to received packets using header information of the received packets, determining whether the packets are connected by using a flow information table and the flow identification number and allocating or releasing the connection. The packets have a speedy real time property because a connection admission is determined when the packets are transmitted, and, also, can be transmitted without loss with respect to a flow whose connection admission is approved. Additionally, the present invention can secure economic feasibility for a network operator in the case of being applied to a premium service where no packet loss is secured. [Reference numerals] (101) Flow information storage part; (102) Controller; (103) Reception unit; (104) Output unit; (AA,BB) Packet
Abstract:
기가비트 수동형 광 네트워크에서 하이브리드 중계장치의 광신호 중계방법은 하향 WDM-PON OLT(Wavelength Division Multiplexing-Passive Optical Line Terminal) 광신호에 대응하는 1차 직렬 전기신호 및 하향 GPON OLT(Gigabit Passive Optical Network Optical Line Terminal) 광신호에 대응하는 제 2 직렬 전기신호 중 어느 하나의 직렬 전기신호를 선택 수신하고, 상기 하향 직렬 전기신호를 하향 GTC(GPON Transmission Convergence) 프레임으로 변조하며, 상기 하향 GTC 프레임으로부터 상향전송을 위한 제어정보를 추출하고, 상기 하향 GTC 프레임을 하향 직렬 전기신호로 변환하며, 변환된 직렬 전기신호를 GPON OLT 광 송수신기에서 광신호로 변환하여 전송한다. 또한 상기 추출된 제어 정보를 이용하여 상향 버스트 광신호를 추출하고, 추출된 버스트 광신호를 직렬 전기신호로 변환한 후 버스트 GTC프레임으로 변조하여, 변조된 버스트 GTC프레임을 연속적인 GTC프레임으로 변환 한 후 다시 직렬 전기신호로 변환한 후, 상기 선택된 OLT의 광신호로 전송한다. GPON, WDM-PON, OMCI
Abstract:
PURPOSE: A relay device f a bit passive optical network and method of relaying thereof are provided to use the control information to an uplink transmission by extracting control method form a signal during downlink transmission. CONSTITUTION: A GPON framer(420) modulates one electric signal among a first downstream electric signal corresponding to a downstream WDM-PON OLT(Wavelength Division Multiplexing-Passive Optical Network Optical Line Terminal) optical signal and a second downstream electric signal corresponding to the downstream GPON OLT optical signal into a downstream GTC(GPON Transmission Convergence) frame. The GPON framer extracts control information for upstream from the downstream GTC frame. A GPON OLT optical transmitter-receiver(410) changes a transformed electric signal into an optical signal.