KR20090039403A - Method and apparatus for adapting a number of different client - Google Patents

Abstract

A method and an integration interface board for accommodating signals of various nets are provided to improve the effectiveness of the OTN(Optical Channel Transport Network) access facility by comprising a common platform for connecting to OTN. A dependent signal transform unit(110) performs an inter-conversion to the reverse the dependent signal of an arbitrary to the SONET(Synchronous Optical Network) signal or the SDH(Synchronous Digital Hierarchy) signal. An OTH framer(120) performs an inter-conversion the SONET signal or the SDH signal to an OTH(Optical Transport Hierarchy) signal or an OTH(Optical Transport Hierarchy) signal to the SDH signal. A signal transfer unit(130) performs an inter-conversion of the OTH signal in the electricity between OTN(Optical Transport Network) or into a reverse direction.

Description

Method for integrating dependent signals and integrated access board {Method and Apparatus for adapting a number of different client}

The present invention relates to a method for receiving signals of various existing networks as dependent signals based on an optical transmission network (OTN).

The present invention is derived from the research conducted as part of the IT source technology development project of the Ministry of Information and Communication and the Ministry of Information and Communication Research and Development. [Task Management No .: 2006-S-060-02, Project Name: OTH-based 40G multi-service transmission technology Development].

The existing networks were operating independently, but recently, the International Telecommunication Union (ITU-T) defined and standardized it as an optical transmission network (OTN) through Recommendation G. 709 to integrate it into one network. According to this, the standardization of various existing networks, that is, SONET / SDH, IP-based Ethernet, ATM, and the like, as a slave signal and mapping them to ODT signals is standardized.

Various methods such as SONET / SDH, IP-based Ethernet, ATM, etc. are accepted as slave signals and mapped to ODT signals. The present invention proposes a common platform for accessing OTN by receiving various dependent signals as described above.

The integrated board proposed in the present invention proposes a common platform for accessing OTN by receiving various dependent signals.

The present invention can be implemented with a minimum of module replacement or without module replacement by configuring a common platform for receiving various various dependent signals to access the OTN. This improves the efficiency of OTN access equipment by satisfying different requirements simultaneously when connecting multiple networks.

As a preferred embodiment of the present invention, the integrated connection board is a slave signal conversion unit for performing a mutual conversion of any dependent signal to the SONET signal or SDH signal and vice versa; OTH framer that performs interconversion on the signal and vice versa ; And a signal transfer unit performing interconversion of the OTH signal into an electrical or optical signal and vice versa, and transmitting the electrical or optical signal between an optical transmission network (OTN).

In another preferred embodiment of the present invention, the OTH framer device comprises: a first mapper for mapping the SONET signal or SDH signal to an ODU1 or OTU1 frame and vice versa; A first overhead detachment unit for inserting an ODU1 overhead or an OTU1 overhead into the output signal of the first mapper or performing a reverse process function; A second mapper which multiplexes the output signals from the first four mappers and maps them to an ODU2 or OTU2 frame, or performs a reverse process; and inserts an ODU2 overhead or an OTU2 overhead into the output signal of the second mapper Or a second overhead detachment unit that performs the reverse process function.

In another preferred embodiment of the present invention, a method for integrating a dependent signal in an integrated access board includes: a dependent signal conversion step of performing a mutual conversion of any dependent signal into a SONET signal or an SDH signal and vice versa; An OTH framing step of performing an interconversion of the SONET signal or the SDH signal to an OTH signal or vice versa ; And a signal transfer step of performing an interconversion of the OTH signal into an electric or optical signal and vice versa, and transmitting the electric or optical signal between an optical transmission network (OTN).

In another preferred embodiment of the present invention, the method for accommodating the dependent signal in the OTH framer device includes the method for accommodating the dependent signal in the OTH framer device. A first mapping step of mapping a signal to an ODU1 or OTU1 frame or vice versa; A first overhead detachment step of inserting an ODU1 overhead or an OTU1 overhead into the output signal of the first mapper or performing a reverse process function thereof; A second mapping step in which a second mapper multiplexes output signals from the first four mappers and maps them to an ODU2 or OTU2 frame or performs a reverse process function; and an ODU2 overhead or an output signal of the second mapper; And a second overhead detachment step of inserting the OTU2 overhead or performing the reverse process function.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the same elements among the drawings are denoted by the same reference numerals and symbols as much as possible even though they are shown in different drawings.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Representative configurations implemented in the present invention are as follows. The reverse of each embodiment is also included.

In the first embodiment, after converting a client signal into a 2.5G SONET / SDH signal and mapping it to ODU 1, ODU1 signal is generated by inserting ODU1 overhead, and ODU2 is mapped to four ODU1 signals to ODU2 over. Insert the head to generate the ODU2 signal.

In the second embodiment, the client signal is converted to 10G SONET / SDH signal, and then mapped to ODU 2 to generate ODU2 signal by inserting ODU2 overhead, and to ODU3 by mapping four ODU2 signals to ODU3 overhead. To generate the ODU3 signal.

In the third embodiment, after converting a client signal into a 2.5G SONET / SDH signal and mapping it to ODU 1, an ODU1 overhead is inserted to generate an ODU1 signal, and 16 ODU1 signals are mapped to ODU3 to ODU3 over. Insert the head to generate the ODU3 signal.

In the fourth embodiment, the client signal is converted to a SOG / SDH signal of 2.5G level, mapped to OTU 1, and an OTU1 overhead is inserted to generate an OTU1 signal.

In the fifth embodiment, the client signal is converted to a SOG / SDH signal of 2.5G level, mapped to ODU 1, and an ODU1 overhead is inserted to generate an ODU1 signal. Thereafter, four ODU1 signals are collected and mapped to OTU2, and then an OTU2 header is inserted to generate an OTU2 signal.

The above embodiments are examples of the present invention, and many other modifications are possible. Hereinafter will be described in more detail with the drawings.

Figure 1 is a preferred embodiment of the present invention, showing the internal configuration of the integrated connection board.

The integrated connection board includes a slave signal converter 110, an OTH framer 120, and a signal transmitter 130.

When the dependent signal received from the client side is converted into the SONET signal or the SDH signal form in the slave signal converter 110 and transmitted to the OTH framer 120, the OTH framer 120 transmits the optical signal of the SONET signal or the SDH signal. The signal is converted into an transmission layer (OTH) signal and transmitted to the optical transmission network (OTN) through the signal transmission unit 130. However, this only describes the process of transmitting to the optical transmission network from the client side, and the reverse process is also possible.

The dependent signal converter 110 receives various dependent signals such as SONET / SDH, GbE, ATM, FC, ESCON from the client side, converts them into electrical signals, and maps them back to SONET signals or SDH signals. In addition, the reverse process restores each original dependent signal from the SONET signal or the SDH signal, converts it to an optical signal, and sends it back to the client.

The OTH framer 120 receives the SONET signal or the SDH signal from the subordinate signal converter 110 and converts the signal into an ODT signal. In addition, the phototransmission threshold signal received from the signal transmission unit 130 is converted into a SONET signal or an SDH signal and transmitted to the OTH framer 120.

In terms of bit rate, the OTH signal has a minimum unit of 2.5G class, which is about four times larger, and is now standardized from ITU-T G.709 to 40G class. The division is indicated by the numbers 1, 2, and 3, meaning 2.5G, 10G, and 40G, respectively.

In addition, in terms of the digital layer, OTH is mapped (framing) into three stages: OPU, ODU, and OTU. Of these, an optical channel payload unit (OPU) is composed of a payload region for mapping dependent signals and a limited overhead region, and thus is not a form that can be transmitted by itself. Therefore, in order to access and transmit the OTN, an ODU (Optical Channel Data Unit) or OTU (Optical Channel Transport Unit) must be converted. Therefore, the OTH framer may be configured as one of ODU1, ODU2, ODU3 to OTU1, OTU2, and OTU3.

The signal transfer unit 130 performs an interconversion between the OTH framer 120 and the optical transmission network OTN and converts the OTH signal into an electric or optical signal and vice versa and transmits the signal. When the OTH framer 120 receives the ODU signal, the signal transmission unit 130 converts the signal into an electrical signal and transmits the signal to the OTN. On the contrary, when the electrical signal is received from the OTN, the signal is converted into an ODU signal, and when the optical signal is received, the OTU signal is converted into an OTU signal and transmitted to the OTH framer 120.

In order to connect with the OTN in the signal transmission unit 130, two forms are possible. First, when there is a line card for transmitting to the OTN, there is a form configured to connect through a backplane (BackPlane) (FIGS. 2A and 2B). In addition, another implementation is in the form of an optical transceiver for transmitting an optical signal after all-optical conversion in order to directly connect to the OTN (FIGS. 3A and 3B).

2 (a) and 2 (b) show embodiments of the integrated access board.

The physical size of the slave signal converters 210 and 211 and the interface size of the OTH framers 220 and 221 are designed to be the same, and thus the type of slave signals to be accommodated can be converted simply by mounting or dismounting.

The OTH framers 220 and 221 may be implemented with four channels of a 4-bit STM-16 signal at an interface with the slave signal converters 210 and 211.

Signal transmitters 230 and 231 are composed of multiplex and demultiplexers (SERDES) and cross-connect switches for protection and switching to connect to the backplane. In addition, the 4-bit ODU1 signal of the ODU1 framer 220 is multiplexed into a 2.5G 4 channel, and then connected to the backplane according to a working / protection operation path through a 12:12 switch.

The signal transmission units 230 and 231 of FIGS. 2A and 2B are for backplane connection, and a separate transmission line card for OTN transmission is mounted in the self and connected through the backplane. In this case, the slave card connection line card and the OTN transmission line card are mounted.

3 (a) and 3 (b) show embodiments of converting a signal transmission unit in an integrated access board. 3 (a) and 3 (b) show an optical link by using the slave signal converter and the OTH frame in FIGS. 2 (a) and 2 (b) in the same manner and simply replacing or mounting the signal transmitters 330 and 331. It is modified so that it can select whether to connect to or to the backplane.

The slave signal converters 310 and 311 may use the same ones as those shown in FIGS. 2A and 2B, and may be replaced, mounted, or dismounted depending on the type of the slave signal.

The OTU1 framers 320 and 321 used as an example of the OTH framer add an OTU1 overhead to the ODU1 framer of FIG. 2 and can be implemented as a change or software of an internal logic circuit without replacement.

The signal transmission units 330 and 331 are composed of an OTN transmission optical transceiver and directly connected to the OTN optical link. In addition, in order to load the four-channel OTU1 signal on the OTN, after all-optical conversion, a wavelength is allocated and transmitted along the optical link.

4 (a) and (b) illustrate embodiments of converting a signal transmission unit in an integrated access board. 4 (a) and 4 (b) show another example of direct connection with an OTN optical link as shown in FIGS. 3 (a) and 3 (b).

4 (a) and 4 (b), the four signals (4 x STM-16) of the 2.5G level are not simply framed by OTU1, but a step further goes to the higher signal OTU2 according to the G.709 standard. There is a difference in that a 10G level signal is generated by multiplexing using a 10.7G 300-pin optical transceiver and a 10G level signal is transmitted at a wavelength.

The slave signal converters 410 and 411 are the same as those shown in FIGS. 3A and 3B, and thus may be replaced and mounted according to the slave signals.

The OTU2 framers 420 and 421 used as examples of the OTH framers are the addition of the functions such as 4: 1 TDM multiplexing and OTU2 overhead insertion to the four-channel OTU1 framer functions of FIGS. 3A and 3B. It can be implemented by changing the internal logic circuit and software by selecting the mode without the need.

The signal transmitters 430 and 431 use a 10.7G 300-pin multi-source agreement (MSA) optical transceiver with 1: 16: 1 SERDES. Optionally replace the signal transmission units 330 and 331 used in FIGS. 3A and 3B according to whether four channels are allocated to each wavelength to be connected to the OTN, or all of them are sent in one wavelength as a high-speed one channel. Mounting and hernias are possible for this purpose.

2 to 4, the GbE diagram can be applied to other protocols of 1.25G or less per port such as FC and ESCON, if the function is appropriately configured through internal logic circuits and software control.

Figure 5 shows a detailed configuration of the integrated connection board as a preferred embodiment of the present invention. The integrated connection board of the present invention includes a slave signal converter 510, an OTH framer 520, and a signal transmitter 530.

The slave signal converter 510 converts any slave signal into a SONET signal or an SDH signal without replacing the slave signal converter for the STM-16 and GbE as well as other various slave signals illustrated in FIGS. 2 to 4. Conversely, perform the interconversion. To this end, a GFP framer 511, a photoelectric converter 512, a synchronizer 513, and an STM framer 514 are included. For a specific embodiment, see FIG. 6.

The OTH framer 520 converts the SONET signal or the SDH signal received from the subordinate signal converter 510 into an ODT signal, or vice versa. The OTH framer 520 illustrated in FIG. 5 is an example configured to implement various OTH frames in one chip. The OTH framer 520 includes an ODU1 mapper 521, an ODU2 mapper 522, a first overhead detachment part 523, and a second overhead detachment part 524. For a specific embodiment, see FIG. 7.

The signal transfer unit 530 converts the OTH signal received from the OTH framer 520 into an electric or optical signal between the optical transmission network OTN or vice versa. To this end, the signal transmission unit 530 includes a SerDes unit (Serializer / Deserializer) 531, an optical module 532, and a switch 533. For a specific embodiment, see FIG. 8.

6 illustrates an integrated dependent signal converter as a preferred embodiment of the present invention.

When the slave signal coming from the client side is in burst mode (S600), the GFP framers 511 and 611 transmit the slave signal to the GFP (Generic Framing Procedure). The frame is converted into a frame, and vice versa, the GFP frame is converted into a dependent signal in burst mode and transmitted to the client side.

The GFP frame is a standardized standard used to map a burst mode signal to a continuous mode signal. The process of converting the GFP frame into a GFP frame is as follows. In other words, the empty space between the meaningful data among the dependent signals in the burst mode is removed, and only the actual data is extracted and mapped, and the overhead is added. Examples of burst mode signals include GbE series signals, Fiber Channel (FC), FICON signals, and ESCON. These signals are transmitted in packet units.

Next, when the dependent signal is in the continuous mode (S601), the optical signal of the dependent signal is converted into an electrical signal, and vice versa, the electrical signal is converted into an optical signal (612). Examples of the dependent signal in the continuous mode may include an STM series signal and an 8DH 8TM series signal.

Subordinate signals in continuous mode transmit full frames without meaningless signal intervals. The OTH (OTN) series can also be basically viewed as a dependent signal of the continuous mode series, so it can be easily mapped or demapped when converted to SDH and transmitted as OTH signal.

The synchronization unit 513 or 613 synchronizes the signals converted by the GFP framers 511 and 611 and the photoelectric conversion units 512 and 612 and transmits them to the STM framers 514 and 614. The STM framers 514 and 614 may convert the synchronized signals into SONET signals or SDH signals, or vice versa, and convert SONET signals or SDH signals into electrical signals or GFP frames.

7 shows an integrated OTH framer as one preferred embodiment of the present invention.

OTH framers include ODU1 mappers 521 and 721, ODU2 mappers 522 and 722, first overhead removers 523 and 723 and second overhead removers 524 and 724 and error correction units 725 and 726. ).

The ODU1 mapper 721 maps the SONET signal or the SDH signal received from the slave signal converter to the ODU1 frame and vice versa to convert the ODU1 frame into the SONET signal or the SDH signal. In the ODU1 framer, the ODU1 framer performs the function of mapping the SDH series STM-16 signal to the ODU1 frame and inserting the ODU1 overhead.

In the ODU2 mapper 722, four ODU1 framers 721 may be bundled and multiplexed, or an ODU2 frame may be demultiplexed into an ODU1 frame. The method used in this case uses the method standardized in ITU-T G.709. In this case, since four times the speed of the ODU1 frame does not match the speed of the ODU2, multiplexing may be performed in an asynchronous manner.

The first overhead detachment unit 723 inserts the ODU1 overhead or the OTU1 overhead into the phototransmission threshold signal which is the output signal of the ODU1 framer 721 or performs the reverse process function.

The second overhead detachment unit 724 inserts the ODU2 overhead or the OTU2 overhead into the phototransmission threshold signal which is the output signal of the ODU2 framer 722 or performs the reverse process function.

The error correctors 725 and 726 code or decode a Forward Error Correction (FEC) code that corrects errors in a signal with ODU1 overhead or OTU1 overhead inserted and a signal with ODU2 overhead or OTU2 overhead inserted. The FEC code is a code for correcting an error occurring in a long distance transmission at the receiving end. Codes standardized in G.709 can be used as FEC codes, and codes with better gains can be produced and used.

8 (a) and 8 (b) illustrate an integrated signal transmission unit as a preferred embodiment of the present invention. The signal transfer unit 530 includes a SerDes unit 531, an optical module 532, and a switch 533.

The SerDes units 531, 831a, and 831b multiplex the phototransmitter (OTH) signal with an electrical or optical signal or demultiplex the multiplexed signal with an OTH signal. As a specific example, the SerDes unit may be implemented as a 16: 1 multiplexer 831a and a 1:16 demultiplexer 831b. An example 16: 1 multiplexer 831a will be described below.

The first 4: 1 multiplexer 841 multiplexes 4 channels by 4 bits into 4: 1, respectively, and then the second 4: 1 multiplexer 845 outputs from the first 4: 1 multiplexer 841. The four signals are then multiplexed back to 4: 1.

The 16: 1 multiplexer 831a is largely divided into a mode in which 4 bits are bundled and processed using 4 independent clocks, and a mode in which 16 data channels are multiplexed using a single clock.

The former receives four clocks from the OTH framer in a configuration for implementing the functions of FIGS. 2 (a) and (b) to 3 (a) and (b). On the other hand, the latter is to implement a function as shown in Figs. 4 (a) and (b) is provided only one clock from the OTH framer. Accordingly, there is a need for a clock divider 843 that divides one clock into four and a phase adjuster 842 to adjust the time difference between the four clocks that may occur after being distributed or the phase difference between the clock and the data.

The second 4: 1 multiplexer 845 operates when the latter is selected, and multiplexes the output of the first 4: 1 multiplexer 841 to 4: 1. The four inputs between the first 4: 1 multiplexer 841 and the second 4: 1 multiplexer 845 must be precisely in phase with each other. In this case, the output is 10G class, so the XFP (10Gb / s small form factor pluggable) It is connected to an optical module and modulated into an optical signal.

On the other hand, when the former is selected, the outputs of the first 4: 1 multiplexer 841 are copied to two through the output buffer and output. One of the output signals is connected to four small form factor pluggables (SFPs) or optical transceivers such as SFP + and XFP, respectively. If there is enough space, it is also possible to mount higher speed optical modules such as SFP + and XFP. The other signal is not converted to an optical signal, but is connected to a 12:12 cross-connect switch to connect to the backplane at the 2.5G level.

The optical module 832 transmits the optical transmission network OTN and the SerDes unit 831 multiplexed or demultiplexed signals. In FIG. 8 (a) and (b), four SFPs are drawn at the time of transmission and four at the time of reception, but are drawn for clarity. In reality, one SFP module is in charge of all the transceivers. In other words, four pieces are required for transmission and reception.

The switch performs a switching connection in the transmission of the multiplexed or demultiplexed signal between the optical module 832 and the optical network (OTN). An example is a 12:12 cross-connect switch. have.

9 is a flowchart illustrating a method of integrating dependent signals in an integrated access board, according to a preferred embodiment of the present invention.

The method of integrating the dependent signals in the integrated access board is largely composed of a dependent signal conversion step (S910), an OTH framing step (S920), and a signal transmission step (S930). For example, the slave signal is transmitted from the client side to the optical transmission network.

The dependent signal converter performs a dependent signal conversion step of receiving an arbitrary dependent signal from the client and converting the signal into a SONET signal or an SDH signal. After the OTH framing step of converting the SONET signal or SDH signal into an optical transmission hierarchy (OTH) signal, and then transferred to the signal transmission unit, the OTH signal is transmitted as an electrical or optical signal between the optical transmission network (OTN). Perform a signal transfer step to perform.

Note that this describes the flow of signal transmission from the client to the optical network, and it should be noted that backwards performance from the optical network to the client is possible at each step. In addition, since the above steps (S910, S920, S930) are substantially the same as or similar to the configuration performed in the subordinate signal converter, the OTH framer, and the signal transmitter corresponding to each of them, the description of the corresponding parts will be referred to. .

Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, which are also implemented in the form of carrier waves (for example, transmission over the Internet). It also includes. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

The best embodiments have been disclosed in the drawings and specification above. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims.

Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Figure 1 is a preferred embodiment of the present invention, showing the internal configuration of the integrated connection board.

2 (a) and 2 (b) show embodiments of the integrated access board.

3 (a) and 3 (b) show embodiments of converting a signal transmission unit in an integrated access board.

4 (a) and 4 (b) illustrate embodiments of converting a signal transmission unit in an integrated access board.

Figure 5 shows a detailed configuration of the integrated connection board as a preferred embodiment of the present invention.

6 illustrates an integrated slave signal conversion unit as a preferred embodiment of the present invention.

7 shows an integrated OTH framer as one preferred embodiment of the present invention.

8 (a) and 8 (b) illustrate an integrated signal transmission unit as a preferred embodiment of the present invention.

9 is a flowchart illustrating a method of integrating dependent signals in an integrated access board, according to a preferred embodiment of the present invention.

Claims (25)

A subordinate signal converting unit converting any subordinate signals into SONET signals or SDH signals and vice versa; An OTH framer that converts the SONET signal or the SDH signal into an optical transmission system (OTH) signal and vice versa ; And And a signal transfer unit configured to perform mutual conversion and transmission between the OTH signal and an electric or optical signal and vice versa with an optical transmission network (OTN). The method of claim 1, wherein the light transmission signal ODU signal or OTU signal, in this case, the signal transmission unit integrated connection board, characterized in that for converting the OTU signal into an electrical signal into an optical signal. The method of claim 1, wherein the dependent signal converter A GFP framer converting the dependent signal into a Generic Framing Procedure (GFP) frame and vice versa when the dependent signal is in burst mode; A photoelectric conversion unit converting the optical signal of the dependent signal into an electric signal and vice versa when the dependent signal is in the continuous mode; A synchronization unit for synchronizing the signal converted by the GFP framer and the photoelectric conversion unit; And And an STM framer for converting the synchronized signal into a SONET signal or an SDH signal and vice versa. According to claim 1, wherein the OTH framer A first mapper for mapping the SONET signal or the SDH signal to an ODU1 or OTU1 frame and vice versa; A first overhead detachment unit for inserting an ODU1 overhead or an OTU1 overhead into the output signal of the first mapper or performing a reverse process function; A second mapper which multiplexes output signals from the first four mappers and maps them to an ODU2 or OTU2 frame or performs a reverse process function; and And a second overhead detachment unit for inserting an ODU2 overhead or an OTU2 overhead into the output signal of the second mapper or performing a reverse process function thereof. The method of claim 1, wherein the signal transmission unit A SerDes unit which multiplexes the optical transmission system (OTH) signal with an electrical or optical signal or demultiplexes the multiplexed signal with an OTH signal; An optical module for transmitting the multiplexed or demultiplexed signal between the optical network (OTN); and And a switch configured to perform a switching connection in the transmission of the multiplexed or demultiplexed signal between the optical module and the optical transmission network (OTN). The method of claim 3, wherein The dependent signal in the burst mode is a GbE, 10GbE, Fiber Channel (FC), FICON signal And ESCON any one of the integrated connection board. The method of claim 3, wherein The dependent signal in the continuous mode integrated connection board, characterized in that the SONET or SDH series signals. The method of claim 4, wherein And an error corrector for coding or decoding a FEC (Forward Error Correction) code for correcting an error of the signal into which the ODU1 overhead or the OTU1 overhead is inserted and the signal into which the ODU2 overhead or the OTU2 overhead is inserted. Integrated access board, characterized in that. The method of claim 5, wherein the SerDes portion A first SerDes unit which multiplexes or demultiplexes the phototransmission signal to 4: 1 or 1: 4 using four independent clocks; and And a second SerDes unit for multiplexing or demultiplexing the four signals output from the first SerDes unit back to 4: 1 or 1: 4. The method of claim 5, wherein the optical module Integrated access board comprising a SFP and XFP. The method of claim 5, wherein the switch Integrated connection board, characterized in that it is a cross-connect switch. A first mapper for mapping an SONET signal or an SDH signal converted from any dependent signal to an ODU1 or OTU1 frame and vice versa; A first overhead detachment unit for inserting an ODU1 overhead or an OTU1 overhead into the output signal of the first mapper or performing a reverse process function; A second mapper which multiplexes output signals from the first four mappers and maps them to an ODU2 or OTU2 frame or performs a reverse process function; and And a second overhead detachment unit for inserting an ODU2 overhead or an OTU2 overhead into the output signal of the second mapper or performing a reverse process function thereof. The method of claim 12, wherein the second mapper OTH framer device according to the ITU-T G.709 standard method. As a method of integrating dependent signals in the integrated connection board, A dependent signal conversion step of performing an inter-conversion of any dependent signal to a SONET signal or an SDH signal and vice versa; An OTH framing step of performing an interconversion of the SONET signal or the SDH signal to an OTH signal or vice versa ; And And a signal transfer step of converting the OTH signal into an electric or optical signal and vice versa with an optical transmission network (OTN) and performing transmission. 15. The method of claim 14, wherein the light transmission signal is ODU signal or OTU signal, in this case, the signal transmission step, characterized in that for converting the OTU signal into an electrical signal to convert the OTU signal into an optical signal. 15. The method of claim 14, wherein the dependent signal conversion step A GFP framing step of converting the dependent signal into a GFP frame and vice versa when the dependent signal is in the burst mode; A photoelectric conversion step of converting the optical signal of the dependent signal into an electrical signal and vice versa when the dependent signal is in continuous mode; A synchronization step of synchronizing the signals converted in the GFP framing step and the photoelectric conversion step; And And converting the synchronized signal into a SONET signal or an SDH signal, and vice versa. The method of claim 14, wherein the OTH framing step A first mapping step of mapping the SONET signal or the SDH signal to an ODU1 or OTU1 frame or vice versa in a first mapper; A first overhead detachment step of inserting an ODU1 overhead or an OTU1 overhead into the output signal of the first mapper or performing a reverse process function thereof; A second mapping step of receiving and multiplexing output signals from which the first mapping step is performed in four first mappers in a second mapper and mapping them to an ODU2 or OTU2 frame or performing a reverse process function; and And a second overhead detachment step of inserting an ODU2 overhead or an OTU2 overhead into the output signal of the second mapper or performing a reverse process function thereof. The method of claim 14, wherein the signal transmission step A SerDes step of multiplexing the optical transmission phase (OTH) signal into an electrical or optical signal or demultiplexing the multiplexed signal into an OTH signal; Transmitting the multiplexed or demultiplexed signal between the optical transmission network (OTN) through an optical module; and And a switching step of performing a switching connection when transmitting the multiplexed or demultiplexed signal between the optical module and the optical transmission network (OTN). The method of claim 16, The dependent signal in the burst mode is a GbE, 10GbE, Fiber Channel (FC), FICON signal And ESCON. The method of claim 16, The dependent signal in the continuous mode is characterized in that the SONET or SDH series signal. The method of claim 17, And an error correction step of coding or decoding an FEC code to correct an error of the signal into which the ODU1 overhead or the OTU1 overhead is inserted and the signal into which the ODU2 overhead or the OTU2 overhead is inserted. Way. The method of claim 18, wherein the SerDes step A first SerDes step of multiplexing or demultiplexing the phototransmission signal to 4: 1 or 1: 4 using four independent clocks; and And a second SerDes step of multiplexing or demultiplexing the four signals outputted from the first SerDes unit back to 4: 1 or 1: 4. The method of claim 18, wherein the optical module Small form factor pluggable (SFP) and XFP method. A method of receiving a dependent signal in an OTH framer device, A first mapping step of mapping an SONET signal or an SDH signal obtained by aggregating any dependent signals in the first mapper to an ODU1 or OTU1 frame and vice versa; A first overhead detachment step of inserting an ODU1 overhead or an OTU1 overhead into the output signal of the first mapper or performing a reverse process function thereof; A second mapping step of multiplexing output signals from the first four mappers in a second mapper and mapping them to an ODU2 or OTU2 frame or performing a reverse process function; and And a second overhead detachment step of inserting an ODU2 overhead or an OTU2 overhead into the output signal of the second mapper or performing a reverse process function. 25. The apparatus of claim 24, wherein the OTH framer device Method according to the ITU-T G.709 standard method.

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