Patent application number | Description | Published |
20080313253 | OPERATION CIRCUIT FOR MODIFIED EUCLIDEAN ALGORITHM IN HIGH-SPEED REED-SOLOMON DECODER AND METHOD OF IMPLEMENTING THE MODIFIED EUCLIDEAN ALGORITHM - Provided are an operation circuit for a modified Euclidean algorithm in a high-speed Reed-Solomon (RS) decoder and a method of implementing the modified Euclidean algorithm. Since a finite state machine (FSM) for generating a stop signal and an FSM for generating a control signal that controls a swap operation, a shift operation, and a polynomial operation for each basic cell of the modified Euclidean algorithm are used, an area-efficient RS decoder can be realized without using a conventional degree computation unit for comparing and calculating degrees. | 12-18-2008 |
20090034987 | WIDEBAND ELECTRIC SIGNAL MIXER AND OPTICAL TRANSMITTER USING THE SAME - There are provided a wideband electric signal mixer capable of mixing two inputted electric signals having a wideband frequency spectrum. The wideband electric signal mixer includes an input terminal controlling an input interface and a phase of a differential signal of a first electric signal and a second electric signal, having a wideband spectrum; a signal mixing terminal comprising a transmission gate switch receiving and outputting the second electric signal and mixing the first electric signal with the second electric signal by turning the transmission gate switch on and off using the differential signal of the first electric signal passing through the input terminal; and an output terminal providing an output interface between a mixing signal outputted from the signal mixing terminal and an external circuit unit and amplification function of the mixing signal. | 02-05-2009 |
20090046745 | APPARATUS FOR TRANSMITTING AND RECEIVING DATA WITH VARIOUS DATA CAPACITIES AT HIGH SPEED - There is provided an apparatus for transmitting and receiving data with various data capacity at high speed. The apparatus for transmitting and receiving data includes a client signal interface block converting client signals being received through media into a high-capacity electrical signal and selectively interfacing the converted high-capacity electrical signal through high-speed multi-channel; a framer receiving the selectively interfaced electrical signal from the client signal interface block and multiplexing and mapping the received electrical signal into 40 G multi-channel frame signals; and a SERDES & transceiver receiving the 40 G multi-channel frame signals from the framer, multiplexing the received multi-channel frame signals with the 40 G serial signals and transmitting the multiplexed 40 G serial signals. The apparatus for transmitting and receiving data may be useful to decrease its space and stably receive client signals by selectively interfacing various client signals with replacing the client signal interface blocks only, depending on the client signals to be supplied to the same transmitting/receiving apparatus. | 02-19-2009 |
20090129455 | APPARATUS FOR AND METHOD OF AUTOMATICALLY CONTROLLING SKEW BETWEEN TRANSMITTED DATA - Provided is an apparatus for and method of automatically controlling skew between transmitted data, which is caused when a common low-speed field-programmable gate array (FPGA) transmits signals having a transmission rate in the range of tens of Gbps to an optical transponder. The apparatus and method can transmit data with a transmission rate of several Gbps irrespective of the type of the FPGA. | 05-21-2009 |
20090154471 | METHOD OF AND APPARATUS FOR PROCESSING VIRTUAL LOCAL AREA NETWORK TAG FRAME - Provided are a method of and apparatus for processing a virtual local area network (VLAN) tag frame. The apparatus includes a filtering data base (FDB) for storing a VLAN tag frame which is created by a gigabit passive optical network (GPON) master; an uplink processing unit for removing by referring to the FDB a VLAN tag from the VLAN tag frame which is received from the GPON master, and transmitting a data frame to an Ethernet switch; and a downlink processing unit for inserting by looking up the FDB a VLAN tag into the data frame which is received from the Ethernet switch, and then transmitting the data frame to the GPON master. According to the present invention, port identification (ID) information that is lost in a GPON master may be provided to a switch above the GPON master by using a VLAN tag frame processing technology. | 06-18-2009 |
20090154479 | APPARATUS FOR MATCHING GIGABIT ETHERNET (GbE) SIGNALS WITH OPTICAL TRANSPORT HIERARCHY (OTH) - Provided is an apparatus for matching Gigabit Ethernet (GbE) signals to an Optical Transport Hierarchy (OTH). The apparatus real-time records a source address and input port information of GbE Ethernet frames in a memory, compares a destination address of the Ethernet frame which is a payload of a GFP frame with memory table information, searches an output port location of the GbE, and interreceives GbE frames and Generic Frame Procedure (GFP) frames by multiplexing/demultiplexing. | 06-18-2009 |
20090154937 | APPARATUS FOR RESTORING CLOCK SIGNAL BY USING CIRCULATOR - Provided is an apparatus and method for restoring clock signals by using a circulator in an optical transmission system. The apparatus includes a circulator, which allows one of N types of input data signals having different transmission speeds to circulate in a single direction, band pass filters, which extract N types of clock frequency components respectively corresponding to each transmission speed of the N types of input data signals, and clock amplifiers, which amplify each of the N types of clock frequency components. | 06-18-2009 |
20100229074 | METHOD AND APPARATUS FOR TRANSMITTING DATA IN OPTICAL TRANSPORT NETWORK - A method of transmitting data in an optical transport network is provided. The method comprises generating an optical transmission unit frame including an in-band area including a first area to which information data is allocated and a second area to which the information data is not allocated and an out-band area including parity information and transmitting the data through the optical transmission unit frame. | 09-09-2010 |
20100299578 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING DATA - A transmitting apparatus in a transport network performs forward error correcting encoding for each virtual lane set as a multiple of the transmission channels, to generate virtual frames including independent parity bytes for each virtual lane. The generated virtual frames are transmitted through at least one transmission channel. In addition, a receiving apparatus detects the virtual frames for each virtual lane from a signal received through a transmission channel by using a frame assignment sequence, and performs forward error correcting decoding by using the parity bytes included in the virtual frames detected for each virtual lane. | 11-25-2010 |
20130114959 | METHOD AND APPARATUS FOR TRANSMITTING DATA IN OPTICAL TRANSPORT NETWORK - A method of transmitting data in an optical transport network is provided. The method comprises generating an optical transmission unit frame including an in-band area including a first area to which information data is allocated and a second area to which the information data is not allocated and an out-band area including parity information and transmitting the data through the optical transmission unit frame. | 05-09-2013 |
20140178075 | METHOD AND APPARATUS FOR TRANSMITTING DATA IN OPTICAL TRANSPORT NETWORK - A method of transmitting data in an optical transport network is provided. The method comprises generating an optical transmission unit frame including an in-band area including a first area to which information data is allocated and a second area to which the information data is not allocated and an out-band area including parity information and transmitting the data through the optical transmission unit frame. | 06-26-2014 |