Abstract: A packet transmitting method and apparatus in an optical transport network may be provided. The packet transmitting method may include sensing a request for transmitting a packet client signal of a predetermined capacity, during transmission operated based on an ODUflex(GFP) scheme, extending, to the predetermined capacity, a size of a connection link among a transmitting apparatus, a relay apparatus, and a receiving apparatus when the request is sensed, expanding, to the predetermined capacity, a bandwidth among the transmitting apparatus, the relay apparatus, and the receiving apparatus when the size of the connection link is extended, and transmitting the packet client signal by changing a transmission scheme from the ODUflex(GFP) scheme to an ODUk(GFP) scheme, when the bandwidth is expanded.

Abstract: An optical communication system is provided. In particular, multi-lane signal transmitting and receiving apparatuses capable of transmitting and receiving a multi-lane signal using the same inverse multiplexing scheme even when optic modules having several transport lane numbers are selected according to a purpose of use are provided. Each OTUk capable of containing a client signal in a transport hierarchy signal (OTUk-Xv) is defined as a virtual container, and Y virtual lanes are allocated to respective virtual containers X, in which identification information for the allocated virtual lanes is inserted into an overhead area and a transport hierarchy multi-lane signal is transmitted in the form of OTUk-XvYd.

Abstract: Disclosed are an apparatus and a method for mapping an SDH signal and other 40-Gbps client signals through a single data path. The mapping apparatus supports both a justification byte mapping scheme and a sigma-delta distribution mapping scheme and implements a single data path. Accordingly, power consumption may be reduced by changing each mapping mode in a hitless manner or minimizing logic capacity according to a mapping mode used in the mapping apparatus.

Abstract: The development of transmission technologies have resulted in a several tens Gbps optical transmission system. In the present invention, a low-speed FPGA receives a plurality of several Gbps signals according to a very high-speed parallel converting unit and the SFI-5, divides each of the plurality of several Gbps signals into a plurality of several hundreds (Mbps) parallel signals, and processes the plurality of several hundreds (Mbps) parallel signals in order to constitute an SFI-5 receiving end.

Abstract: A method of transmitting a packet in an optical transport network includes: generating a GFP frame by GFP encapsulating a packet client signal; mapping the GFP frame to a dynamic data unit; multiplexing to a high order data unit in an order higher than that of the dynamic data unit using at least one dynamic data unit; generating a high order transport unit using the multiplexed high order data unit; and transmitting the high order transport unit.

Abstract: Provided are a method and apparatus for increasing transmission capacity for large-capacity high-speed signal transmission in an optical transport network (OTN). A method and apparatus for increasing transmission capacity are needed, which can transmit a large-capacity high-speed signal in order to transmit a signal through a united OTN by adapting signals from various tributary signal networks which have been independently operated for voice, image, or data transmission. Although various types of techniques such as Time Division Multiplexing (TDM), Wavelength Division Multiplexing (WDM), and an optical Printed Circuit Board (PCB) method have been performed, the techniques have various limitations. Therefore, a method and apparatus is provided for embodying a large-capacity optical transmission network, which overcome the limitations by using a Virtual Concatenation (VC) method.

Abstract: 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.

Abstract: 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.

Abstract: Disclosed area method and apparatus of transporting client signals and a method and apparatus of mapping or demapping tributary slots for transport of client signals. The client signal transporting apparatus defines a bit rate of an optical transport signal, and bit-transparently maps and multiplexes client signals that operate at the defined bit rate. Also, the client signal transporting apparatus adjusts a bandwidth by extending a mapping area to increase a data capacity to be allocated to tributary slots.

Abstract: An optical communication system is provided. In particular, multi-lane signal transmitting and receiving apparatuses capable of transmitting and receiving a multi-lane signal using the same inverse multiplexing scheme even when optic modules having several transport lane numbers are selected according to a purpose of use are provided. Each OTUk capable of containing a client signal in a transport hierarchy signal (OTUk-Xv) is defined as a virtual container, and Y virtual lanes are allocated to respective virtual containers X, in which identification information for the allocated virtual lanes is inserted into an overhead area and a transport hierarchy multi-lane signal is transmitted in the form of OTUk-XvYd.

Abstract: A pseudo-inverse multiplexing/de-multiplexing apparatus and method are disclosed. The pseudo-inverse multiplexing apparatus maps a client signal to an OPUk-Xpv signal. The OPUk-Xpv signal has a payload area that can be segmented into a plurality of tributary slots and an overhead area into which frame configuration information related to the tributary slots is inserted. The pseudo-inverse multiplexing apparatus decides the number of tributary slots to be used to map client signals, according to a bit rate or bit tolerance of the client signals, and maps the client signals using the determined number of tributary slots. Accordingly, it is possible to map or frame a variety of client signals.

Abstract: Provided are a method and an apparatus for converting an interface between high speed data having various capacities. The apparatus includes a data transmitting part and a data receiving part. The data transmitting part generates a deskew channel having respective timing data of a plurality of data transmitted from a first communicating device, and outputs the generated deskew channel together with the plurality of data to a second communicating device. The data receiving part compares the deskew channel transmitted from the second communicating device with the plurality of data to measure skew values of the data, aligns bits and bytes of the plurality of data using the skew values, and transmits the plurality of data to the first communicating device.

Abstract: The development of transmission technologies have resulted in a several tens Gbps optical transmission system. In the present invention, a low-speed FPGA receives a plurality of several Gbps signals according to a very high-speed parallel converting unit and the SFI-5, divides each of the plurality of several Gbps signals into a plurality of several hundreds (Mbps) parallel signals, and processes the plurality of several hundreds (Mbps) parallel signals in order to constitute an SFI-5 receiving end.

Abstract: 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.

Abstract: A multi-channel data verifying apparatus and method are provided. The apparatus includes a receiver receiving N data channels and a deskew channel generated by sequentially extracting a predetermined data bit from the each of N data channels, and a deskew channel error detector detecting whether the deskew channel received by the receiver corresponds to an expected deskew channel generated and stored based on the test signal or generated based on the previously received deskew channel. Accordingly, data channels, a deskew channel and the entire data capacity can be verified and thus the cause of a problem in the transmission and reception of multi-channel data can be identified in advance.

Abstract: 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.

Abstract: Disclosed is a device and method for optical supervisory channel framing in an optical transport network system including at least one of an optical transmission section, an optical multiplex section, and an optical channel section. A maintenance signal is generated according to a first LOS (Loss OF Signal) signal generated from at least one of the optical transmission section, the optical multiplex section, and the optical channel section. The maintenance signal and a frame-related channel such as a message communication channel are multiplexed to generate an optical supervisory channel frame. The optical supervisory channel frame is output to another device including a repeater and a terminal system through a single supervisory channel.

Abstract: 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.

Abstract: Provided are a method and apparatus for increasing transmission capacity for large-capacity high-speed signal transmission in an optical transport network (OTN). A method and apparatus for increasing transmission capacity are needed, which can transmit a large-capacity high-speed signal in order to transmit a signal through a united OTN by adapting signals from various tributary signal networks which have been independently operated for voice, image, or data transmission. Although various types of techniques such as Time Division Multiplexing (TDM), Wavelength Division Multiplexing (WDM), and an optical Printed Circuit Board (PCB) method have been performed, the techniques have various limitations. Therefore, a method and apparatus is provided for embodying a large-capacity optical transmission network, which overcome the limitations by using a Virtual Concatenation (VC) method.

Abstract: Provided are a method and an apparatus for converting an interface between high speed data having various capacities. The apparatus includes a data transmitting part and a data receiving part. The data transmitting part generates a deskew channel having respective timing data of a plurality of data transmitted from a first communicating device, and outputs the generated deskew channel together with the plurality of data to a second communicating device. The data receiving part compares the deskew channel transmitted from the second communicating device with the plurality of data to measure skew values of the data, aligns bits and bytes of the plurality of data using the skew values, and transmits the plurality of data to the first communicating device.