KR100401127B1 - Interface Method And Device For DWDM Optical Network - Google Patents

Abstract

The present invention provides a frame structure of an IP packet capable of allocating one wavelength to each optical subscriber of a maximum of n users (where n is the number of wavelengths) in a ring-structured network, and performing routing / switching using the wavelengths. An optical network interface device and method capable of directly mapping an optical transmission path using a structure, and a computer-readable recording medium having recorded thereon a program capable of performing such a procedure, the data frame structure comprising: A preamble indicating bit synchronization information between the receiver and the receiver; A Start Frame Delimiter (SFD) field indicating start indication information of a frame; As a tag switching field, a LTIF (Lambda Tag ID Field) indicating 2 ⁿ number of wavelength ID information (where n is the number of wavelengths), a FL (Frame Length) field indicating full frame length information excluding the preamble and SFD, A Destination Lambda Address Field (DLAF) indicating information corresponding to the wavelength address of the destination node, a Source Lambda Address Field (SLAF) indicating information corresponding to the wavelength address of the source node, a traffic data ID, A header field including a frame type (FT) CoS field indicating information such as second layer protocol ID, OAM ID, debugging ID or reservation of DWDM, and processing priority information; An IP payload field indicating traffic data information of an IP; And a cyclic redundancy check (CRC) field for checking the LTIF, the header field, and the IP payload field, and when using an interface device and method using such a frame format, the implementation of fiber to the home (FTTH) Network subscribers can be allocated high bandwidth, efficiently use the wavelength of DWDM without any additional equipment, and the protocol stack layer is thin by IPOW technology, simplifying the adaptation layer, and matching light directly to the physical layer. It consists of a board, can be extended and used for optical home networking, and its structure is simple, so it can be easily implemented.

Description

DDM optical network interface device and method for matching subscriber server in wavelength division multiplexing internet protocol network {Interface Method And Device For DWDM Optical Network}

The present invention relates to IP packet routing in a wavelength division multiplexed Internet protocol network. In particular, the present invention relates to up to n optical subscribers (where n is the number of wavelengths) in a ring-structured network and assigns one wavelength to each optical subscriber. A frame structure of an IP packet that can be routed / switched by using the same, and an optical network interface device and method that can be directly mapped to an optical transmission path by using the frame structure, and a computer that records a program capable of performing such a procedure. The present invention relates to a readable recording medium.

In recent years, with the spread of computers, the demand for data communication has increased, and as a result, transmission path capacity required for IP networks has increased, and services accommodated in the network have been diversified. On the other hand, in order to accommodate increasing traffic, introduction of an optical network using a Wave Division Multiplexing (WDM) technique is disclosed. In particular, high-density wavelength division transmission (DWDM) technology improves optical cable capacity and processing speed by dividing and transmitting optical signals into dozens of channels in an already established optical cable network. It can be used to reduce expenses.

The biggest advantage of this WDM technology is that it can speed up the network at a minimum cost because it speeds up using the existing optical cable. In addition, there is no distinction between voice, video, data communication, etc. in the transmission, since independent transmission is made from the format and form of data, and there is no distinction between SONET / SDH, Gigabit Ethernet, asynchronous transmission mode (ATM), and optical channel. Data transfer is possible.

On the other hand, the demand of packet communication networks is increasing greatly. The conventional technology is in the form of IP Over ATM Over WDM (IPOA) using Asynchronous Transfer Mode (ATM) or IPOS (IP) using SONET (Synchronous Optical Network). Framing Optical Transmission in the form of Over SONET Over WDM) or IP Over SDH (Synchronous Digital Hierarchy) or IP Over Fast / Gigabit Ethernet Over WDM using Fast / GigabitEthernet Recently, in order to reduce overhead in IP packet transmission, a transmission path for directly mapping a data packet to an optical transmission path has been proposed.

As an example, "21" in FIG. 2 represents a protocol stack corresponding to an existing IP Over ATM Over SONET Over WDM network structure, and "22" in FIG. 2 is a simplified IPOW (IP) having the characteristics of a wavelength division multiplexed Internet protocol network. Over WDM) shows the protocol stack of the network structure.

In order to provide IP service in the existing Internet network, it is necessary to frame packets by ATM, SDH, SONET, or Fast / GigabitEthernet to transmit packets. As shown in FIG. There is a disadvantage of having a lot of overhead because it has to go through different electronic multiplexing and electronic switching process repeatedly, and there is a disadvantage in that it is difficult and expensive because of the high complexity.

In addition, although a transmission path for directly mapping a data packet to an optical transmission path through a ring-structured network is proposed among wavelength division multiplexing Internet protocol networks such as "22" in FIG. 2, IP packets on such a network are proposed. There is no suitable frame format for switching / routing.

The present invention was derived to solve the problems of the prior art, a frame that can directly transmit and receive IP traffic through a simplified physical layer and optical layer in a wavelength division multiplex based Internet protocol network, suitable for a ring-structured network It is an object of the present invention to provide an interface device and a method for adapting an IP layer and an optical network layer to encapsulate an IP packet in such a format and to mount it on an optical network. An object of the present invention is to provide a computer-readable recording medium having recorded thereon a program.

1 is an example of a wavelength division multiplexing Internet protocol network structure to which the present invention is applied;

2 is an example of an existing protocol stack and a simplified protocol stack to which the present invention is applied;

3 is an optical network interface card for framing processing suitable for a wavelength division multiplexed Internet protocol network structure according to a preferred embodiment of the present invention;

4 is a frame structure diagram according to the present invention;

5 is a flow chart illustrating transmission via an interface device in accordance with a suitable embodiment of the present invention;

6 is a flow chart illustrating reception via an interface device in accordance with a preferred embodiment of the present invention;

7 is a block diagram of an interface device according to a preferred embodiment of the present invention;

FIG. 8 is a detailed structural diagram of the all-optical and photoelectric conversion and light transmitting / receiving processor shown in FIG. 3.

According to a first aspect of the present invention, there is provided a method for constructing a data frame for an optical network interface capable of transmitting and receiving IP packets between each terminal side and an optical transmission path of a wavelength division multiplex (WDM) based Internet protocol network (IPOW) having a ring structure. Provided,

A preamble indicating bit synchronization information between a transmitting side and a receiving side;

A Start Frame Delimiter (SFD) field indicating start indication information of a frame;

As a tag switching field, a LTIF (Lambda Tag ID Field) indicating 2 ⁿ number of wavelength ID information (where n is the number of wavelengths), a FL (Frame Length) field indicating full frame length information excluding the preamble and SFD, A Destination Lambda Address Field (DLAF) indicating information corresponding to the wavelength address of the destination node, a Source Lambda Address Field (SLAF) indicating information corresponding to the wavelength address of the source node, a traffic data ID, A header field including a frame type (FT) CoS field indicating information such as second layer protocol ID, OAM ID, debugging ID or reservation of DWDM, and processing priority information;

An IP payload field indicating traffic data information of an IP; And

And a cyclic redundancy check (CRC) field for checking the LTIF, the header field and the IP payload field.

In addition, according to the second aspect of the present invention, in the WDM-based Internet Protocol Network (IPOW) formed of a ring structure, it is possible to match with a subscriber server of each terminal, so that a direct IP packet between an input interface and an optical transmission path can be obtained. There is provided an optical network interface device capable of transmitting and receiving, wherein the device,

A framing processor that performs a data link layer and a physical layer procedure for an IP packet to be input and transmitted through the input interface based on wavelength information and IP address information of a network, and an optical signal suitable for transmitting a signal from the framing processor. A transmission unit comprising an all-optical conversion and an optical transmission processing unit for converting the signal into an optical signal;

Photoelectric conversion and light receiving processing unit for photoelectric conversion of the encapsulated IP packet received through the optical transmission path, and the physical layer and data of the signal processed by the photoelectric conversion and light receiving processing unit based on the wavelength information and IP address information of the network A receiver configured as a reframing processor for performing a link layer procedure; And

Consists of a control unit for controlling each function of the transmitter and the receiver,

And storing means for storing the wavelength and IP address information in advance and providing them to the framing processing unit and the reframing processing unit.

In addition, according to a third aspect of the present invention, in a wavelength division multiplex (WDM) based Internet Protocol Network (IPOW) in which a plurality of terminals are interconnected in a ring structure, wavelength information and IP address information of a network are used at a source terminal. In the method for transmitting an IP packet encapsulated in a data frame structure according to the first aspect,

Inserting an FT CoS field into an IP packet received through a host interface;

A second step of looking up a table containing the wavelength information and the IP address information and checking whether a wavelength corresponding to the IP address and / or the destination IP address of the terminal exists;

A third step of inserting a SLAF if there is a wavelength corresponding to its IP address as a result of the second step, and performing an error processing if it does not exist;

A fourth step of inserting a DLAF if there is a wavelength corresponding to the destination IP address as a result of the second step and performing an error processing if it does not exist;

A fifth step of inserting FL and LTIF after the third and / or fourth step;

Calculating a CRC;

A seventh step of error processing if the result of the sixth step is not correct; And

As a result of the sixth step, an eighth step of inserting the preamble and the SFD, and performing an all-optical conversion, transfers the preamble and the SFD to the control node of the connected sub-ring.

In addition, according to the fourth aspect of the present invention, in a WDM-based Internet Protocol Network (IPOW) in which a plurality of terminals are interconnected in a ring structure, wavelength information and IP address information of the network are used at a receiving terminal. There is provided a method for receiving an IP packet encapsulated in a data frame structure according to the first aspect,

A first step of photoelectrically converting the received packet;

Removing the preamble and SFD field;

A third step of performing a CRC check to correct the error if it is not correct and to remove the LTIF if it is correct;

Look up the table with the wavelength information and IP address information to check if the DLAF wavelength information matches its IP address, discard the packet if it does not match, and remove the FL, DLAF, SLAF, and FT and CoS fields if they match. A fourth step of extracting an IP packet; And

And a fifth step of delivering the extracted IP packet to the IP layer through the host interface.

In addition, according to a fifth aspect of the present invention, in the WDM-based Internet Protocol Network (WOW) in which a subring structure in which a plurality of terminals are interconnected is connected to one main ring, control of the subring A method is provided for routing an IP packet encapsulated in a frame structure according to the first aspect by using wavelength information and IP address information of a network at a node.

A first step of determining whether the received IP packet is transmitted from an originating terminal or from a control node of the main ring;

If it is determined from the calling terminal as a result of step 1, then:

A second step of looking up a table in which the wavelength information and the IP address information are stored and comparing whether the IP address of the control node and the wavelength information in the DLAF are the same;

A third step of forwarding the IP packet to another terminal of a sub-node to which the calling terminal is connected if not identical; And

As a result of the second step, if the same, the wavelength-tag including the wavelength information corresponding to the destination node is inserted into the LTIF to transfer the IP packet to a sub ring other than the sub ring to which the originating terminal is connected. Perform a fourth step of delivering to the control node,

As a result of the first step, when it is determined that the transfer from the control node of the main ring,

And a fifth step of looking up the table in which the wavelength information and the IP address information are stored, and delivering the IP packet to the destination node by loading the wavelength information corresponding to the receiving terminal in the DLAF.

In addition, according to the sixth aspect of the present invention, in a wavelength division multiplexing (WDM) based internet protocol network (IPOW) in which a subring structure in which a plurality of terminals are interconnected is connected to one main ring, control of the main ring A method is provided for routing an IP packet encapsulated in a frame structure according to the first aspect at a node, the method comprising:

In the IP packet received from the control node of the sub-ring to which the calling terminal is connected, the destination node is identified by wavelength-tag information included in the LTIF and transmitted to the control node of the sub-ring to which the receiving terminal is connected.

The method according to the fifth and sixth aspects may also be implemented through a computer readable recording medium having recorded thereon a program for executing each step performed in the fifth and sixth aspects.

In the present invention, since the IPOW network does not go through a transmission network system such as SDH (Synchronous Digital Hierarchy), SONET (Synchronous Optical Network), Asynchronous Transfer Mode (ATM), etc. Define and use frame for mounting on optical network. Therefore, the optical network interface device according to the present invention has an advantage that the adaptation layer having an adaptation function between the IP packet layer and the optical network layer is simplified and can be easily implemented, and the optical transmission / reception module is directly matched to the physical layer. Has the features implemented.

These and other advantages and features of the present invention will become more apparent from the following detailed description of the invention.

An optical network interface device and method for directly mapping an IP packet proposed in the present invention to an optical transmission path will be described with reference to the accompanying drawings.

Referring to FIG. 1, there is shown an example of a wavelength division multiplexing Internet protocol network structure in which an IP packet to which an optical network interface device and method according to the present invention is applied can be directly carried on an optical transmission path.

As can be seen from FIG. 1, this network has a maximum of n subrings 12,... 12n connected to one main ring 10, and one main ring control node 11. Up to n terminals are connected to each subring 12, ... 12n, and each subring has one subring control node 13, ... 13n. In Fig. 1, "14" means one terminal connected to a sub-ring, and the optical network interface device according to the present invention can be used internally or externally in a server of the terminal, and in each control node, such an optical network interface. The devices can be mounted in parallel.

2, as mentioned above, shows a schematic structure of a protocol stack for an IP Over ATM Over SONETOver WDM network and a protocol stack for an IP Over WDM network.

3 is a schematic functional diagram of an optical network interface device according to the present invention for framing processing suitable for a wavelength division multiplexing internet protocol network, and FIG. 4 is applied to a wavelength division multiplexing based internet protocol network of a ring structure according to the present invention. A frame structure diagram in which an IP packet is encapsulated.

Prior to the description of the optical network interface device according to the present invention as shown in FIG. 3, a frame suitable for the wavelength division multiple based Internet protocol network structure applied to the optical network interface device and method according to the present invention shown in FIG. 4. In describing the format, the "Preamble" field indicates bit synchronization for matching the transmission / reception speed between the transmitting side and the receiving side, and the "SFD (Start Frame Delimiter)" field indicates a frame start indication, and "LTIF (Lambda Tag). ID Field) "is a field for tag switching. It is composed of a field that can identify whether LTIF is invalid or valid, and a field that can display 2 ⁿ number of wavelength IDs, and the" FL (Frame Length) "field is LTIF. , FL, DLAF, SLAF, FTCoS, Payload, CRC fields, the total length of the "DLAF (Destination Lambda Address Field)" indicates the wavelength (λ) address of the destination node, "SLAF (Source Lambda Address) Field ”indicates the wavelength (λ) address of the source node, and the“ FT (Frame Type) CoS ”field indicates the CoS field, the traffic data ID, and the DWDM that can be distinguished to be quickly processed. Consists of a frame type field that can indicate a layer 2 protocol ID, OAM ID, debugging ID, or reservation. The "Payload Field" is a field for traffic data of IP. Finally, "Cyclic Redundancy Check (CRC)" Field represents a value for the LTIF, FL, DLAF, SLAF, FTCoS, Payload, CRC fields.

The optical network interface device according to the present invention is divided into a transmitter and a receiver. The transmitter corresponds to 310 to 315 in FIG. 3 and the receiver corresponds to 320 to 325. Each function of the transmitter and the receiver of FIG. For example, when the IP packet corresponding to the "44" part of FIG. 4 comes down through the host interface through "31", the framing unit 310 performs the header processing process corresponding to the "43" part of FIG. . The tag-allocator 311 allocates a field corresponding to "42" in FIG. 4, and the control node 13 loads wavelength information for wavelength-tag switching in the field. The wavelength-tag is used for high speed switching in the main ring control node 11 of FIG. Subsequently, the CRC calculator 312 calculates and attaches a CRC to a portion corresponding to the "45" portion of FIG. 4, and the preamble and SFD inserting portion 313 corresponds to a function corresponding to the portion "41" of FIG. It handles the function to mark the start of the frame and the bit sync to match the speed of. Thereafter, the physical layer processing unit 314 performs a procedure as shown in "720" in FIG. 7, and the all-optical conversion and light transmission processing unit 315 performs a process as in "810" in FIG. 8.

In the process of the receiver, firstly, the encapsulated IP packets are received through the optical path of "33". The received packets are performed by the photoelectric conversion and light receiving processing unit 325 as shown in "820" of FIG. 8 and then through the physical layer processing unit 324 such as "720" shown in FIG. Perform the procedure. Subsequently, the preamble and the SFD removal unit 323 remove a portion corresponding to "41" in FIG. 4, and perform a CRC inspection corresponding to "45" in FIG. 4 in the CRC inspection unit 322. Subsequently, the tag-removing unit 321 removes the “42” portion of FIG. 4, and the refraction processing unit 320 removes the “43” portion of FIG. 4. Finally, the pure IP packet corresponding to the "44" part of FIG. 4 is sent to the upper layer through the host interface of "34".

Each function of the transmitter and the receiver may be controlled through the common controller 330, and the controller may use a CPU used in a general computer.

5 is a flowchart illustrating a function of the transmitter of FIG. 3.

In the optical network interface device according to the present invention, which is matched to one of the terminals 14 connected to the sub-ring of FIG. 1, first, the FTCoS is inserted into the IP packet 501 through the host interface (502). Look up a table with address information and wavelength information (503), if there is a wavelength corresponding to its IP address (504), insert a SLAF (506), and if there is a wavelength corresponding to the destination IP address (507) DLAF Insert 508. Otherwise error handling (55 and 59). Next, the FL is inserted (510) and the LTIF is inserted (511). Next, the CRC is calculated (512), and if it is correct, the preamble and the SFD are inserted (514). Thereafter, all-optical conversion corresponding to "315" in FIG. 3 is performed (515), and light transmission processing is performed (516).

These encapsulated IP packets are received at the subring control node 13 and use the wavelength information to determine whether to go to another terminal of the same subring or to which terminal of the other subring to switch / routing. Specifically, in the table in which the wavelength information and the IP address information are stored, the control node own IP address and the wavelength information in the DLAF are compared with each other in the same sub-ring (eg, "12"). Pass it to another terminal (eg "15"), and compare it with its IP address and the wavelength information in the DLAF, in the same case one of the other sub-rings (eg "12n") For example, "16".

The functions of such a control node may be implemented in hardware or software. If it is necessary to go to another sub-ring 12n, the reserved LTIF is loaded with information for the wavelength-tag corresponding to, for example, " 16 "

The main ring control node 11 sees only the LTIF in the header of these packets and performs fast switching to the destination subring.

When the optical signal from the main ring control node 11 arrives at the control node (e.g., "13n") of the destination sub-ring, the table which stores wavelength information and IP address information is "16" in the DLAF. Waveform information of the destination terminal corresponding to the present invention is transmitted and received by the receiver (FIG. 3) of the optical network interface device according to the present invention, which is matched to the server of the terminal. In the case of going to another terminal of the same sub-ring, the receiving unit processes the same according to the flowchart in FIG. 6 because the optical network interface device according to the present invention, which is matched to the server of each terminal, must be passed.

6 is a flowchart illustrating a receiving part of FIG. 3.

Packets received over the optical line are (601) photoelectrically converted (602) to remove the preamble and SFD (603), check the CRC (604) to correct the error if it is not correct (606) and to remove the LTIF if it is correct. (605). Subsequently, the table storing wavelength information and IP address information is looked up 607 to determine whether the wavelength information of the DLAF matches its IP address (608). If it does not match, the packet is discarded (609). The DLAF, SLAF, and FTCoS are removed (610), and the IP packet is sent to the IP layer through the host interface (611).

FIG. 7 is a block diagram illustrating the functional processing of the transmitters 310 to 315 and the receivers 320 to 325 of the optical network interface device shown in FIG. 3. Here, "716" is a storage means for storing information for wavelengths and IP addresses in a table form, and "710" is a function processing in the data link layer. &Quot; 720 " represents functional processing in the physical layer, where the functions " 721 ", " 722 " and " 723 " correspond to the physical layer processing unit 314 of FIG. 3, and " 726 ", " 725 " and " 724 " Corresponds to the physical layer processing unit 324 of FIG.

Referring to FIG. 8, a block diagram for processing an optical transmission / reception module among the functions of the optical network interface device according to the present invention as shown in FIG. 3 is shown, where “810” denotes all-optical conversion and optical transmission of FIG. 3. Corresponding to the processing unit 315, and "820" corresponds to the photoelectric conversion and light receiving processing unit 325 of FIG.

The all-optical conversion and light transmitting processing unit receives the signal 83 received from the physical layer by temperature and current control by the light emitting device driver 812, generates a light source from the light emitting device 811, and sends it to the optical transmission path 81. The conversion and light receiving processing unit receives an optical signal from an optical transmission path (84), converts it into a current signal in the photodetecting element 821, converts it into a voltage signal in the preamplifier 822, amplifies the weak detection signal, and then The amplifier 814 generates an output signal having a constant magnitude regardless of the magnitude of the input signal, and extracts the data 86 and the clock 87 from the clock and data extracting means 824 and uploads it to the physical layer.

As described so far, the optical network interface device and method according to the present invention can efficiently utilize the wavelength in accordance with the DWDM characteristics of the wavelength division multiplexed Internet protocol network, and thus, when the optical cable enters each home, The optical network interface device can be directly matched to a server for communication.

By using this optical network interface card, FTTH (Fiber To The Home) enables the network subscribers to be allocated high bandwidth, efficiently use the wavelength of DWDM without any additional device, and use the protocol stack by IPOW technology. The thin layer allows the adaptation layer to be simplified, and the light can be directly matched to the physical layer to form a single board, and can be extended and used for optical home networking.

On the other hand, these functions can be implemented in software through a program for executing each procedure according to the interface method according to the present invention.

The description so far is directed to the preferred embodiments for the understanding of the invention, and the invention is not limited thereto, and is intended to those skilled in the art without departing from the scope and spirit of the appended claims. It is obvious that various modifications and variations are possible.

Claims (15)

A data frame configuration method for an optical network interface capable of transmitting and receiving IP packets between a terminal side and an optical transmission path of a wavelength division multiplex (WDM) based Internet protocol network (IPOW) having a ring structure, A preamble indicating bit synchronization information between a transmitting side and a receiving side; A Start Frame Delimiter (SFD) field indicating start indication information of a frame; As a tag switching field, a LTIF (Lambda Tag ID Field) indicating 2 ⁿ number of wavelength ID information (where n is the number of wavelengths), a FL (Frame Length) field indicating full frame length information excluding the preamble and SFD, A Destination Lambda Address Field (DLAF) indicating information corresponding to the wavelength address of the destination node, a Source Lambda Address Field (SLAF) indicating information corresponding to the wavelength address of the source node, a traffic data ID, A header field including a frame type (FT) CoS field indicating information such as second layer protocol ID, OAM ID, debugging ID or reservation of DWDM, and processing priority information; An IP payload field indicating traffic data information of an IP; And And a cyclic redundancy check (CRC) field for checking the LTIF, the header field and the IP payload field. An optical network interface device capable of matching with a subscriber server of each terminal in a WDM-based Internet Protocol Network (WOW) having a ring structure and transmitting and receiving IP packets directly between an input interface and an optical transmission path, A framing processor that performs a data link layer and a physical layer procedure for an IP packet to be input and transmitted through the input interface based on wavelength information and IP address information of a network, and an optical signal suitable for transmitting a signal from the framing processor. A transmission unit comprising an all-optical conversion and an optical transmission processing unit for converting the signal into an optical signal; A photoelectric conversion and light receiving processing unit for photoelectrically converting the encapsulated IP packet received through an optical transmission path, and the physical layer and data of the signal processed by the photoelectric conversion and light receiving processing unit based on the wavelength information and the IP address information of the network. A receiver configured as a reframing processor for performing a link layer procedure; And Consists of a control unit for controlling each function of the transmitter and the receiver, And storage means for storing the wavelength and IP address information in advance and providing them to the framing processing unit and the reframing processing unit. The method of claim 2, The framing processing unit, A framing unit 310 for inspecting a frame of an input IP packet and inserting a header; A tag allocator (311) for allocating a wavelength-tag corresponding to wavelength information to be used for switching to the header-embedded frame; A CRC calculator (312) for calculating and inserting a cyclic redundancy check (CRC) for field checking in a frame to which the wavelength-tag is assigned; A preamble and SFD inserting unit (313) for inserting a preamble and an SFD field indicating bit synchronization and frame start to match the speed between the transmitting and receiving sides in the frame; And And a physical layer processor (314) for performing encoding and serial processing of frames from the preamble and the SFD inserter and transferring the frames to the all-optical converter and the optical transmitter. The method of claim 2, The refraction processing unit, A physical layer processor 324 for performing deserialization and decoding of frames from the photoelectric conversion and optical reception processor; A preamble and SFD removal unit 323 for removing a preamble and an SFD field indicating a bit synchronization and a frame start to match the speed between the transmitting and receiving sides to the decoded frame; A CRC checker 322 for performing a cyclic redundancy check (CRC) procedure for checking each field of the frame; A tag removing unit 321 for removing a wavelength-tag corresponding to wavelength information used in IP packet switching; And Optical network interface device, characterized in that consisting of a refraction unit 320 for removing the header of the frame to pass only the pure IP packet to the upper layer through the host interface. The method of claim 3, wherein The all-optical conversion and the optical transmission processing unit, A light emitting device 811 for converting a signal received from the physical layer processing unit 314 into a light source; A light emitting device driver 810 for driving the light emitting device; A current regulator 813 for controlling current of the light emitting device and the light emitting device driver; And And a temperature controller (814) for controlling the temperature of the light emitting element and the light emitting element driver. The method of claim 4, wherein The photoelectric conversion and light receiving processing unit, An optical receiving element 821 for receiving an optical signal from an optical transmission path; Preamplification means 822 for converting the optical signal received by the optical receiving element into a current signal to perform first order amplification; Post-amplification means 823 for performing secondary amplification for outputting the signal from the pre-amplification means as an output signal having a predetermined size; And And clock / data extraction means for extracting data and a clock from the signal from the post amplification means and transferring the data and the clock to the physical layer processor. The method of claim 2, And the framing processor, the reframing processor, and the storage means are configured as one module. The method of claim 2, And the photoelectric conversion and optical transmission processing unit and the photoelectric conversion and optical reception processing unit are configured as one module. The method of claim 8, An optical network interface comprising: a module in which the all-optical conversion and optical transmission processing unit and the photoelectric conversion and optical reception processing unit are combined; Device. In a WDM-based Internet Protocol Network (IPOW) in which a plurality of terminals are interconnected in a ring structure, an IP packet is encapsulated in a predetermined data frame structure by using wavelength information and IP address information of a network at an originating terminal. In the method for transmitting, The data frame structure is: A preamble indicating bit synchronization information between a transmitting side and a receiving side; A Start Frame Delimiter (SFD) field indicating start indication information of a frame; As a tag switching field, a LTIF (Lambda Tag ID Field) indicating 2 ⁿ number of wavelength ID information (where n is the number of wavelengths), a FL (Frame Length) field indicating full frame length information excluding the preamble and SFD, A Destination Lambda Address Field (DLAF) indicating information corresponding to the wavelength address of the destination node, a Source Lambda Address Field (SLAF) indicating information corresponding to the wavelength address of the source node, a traffic data ID, A header field including a frame type (FT) CoS field indicating information such as second layer protocol ID, OAM ID, debugging ID or reservation of DWDM, and processing priority information; An IP payload field indicating traffic data information of an IP; And And a cyclic redundancy check (CRC) field for checking the LTIF, the header field and the IP payload field. The method of transmitting the IP packet is: Inserting an FT CoS field into an IP packet received through a host interface; A second step of looking up a table containing the wavelength information and the IP address information and checking whether a wavelength corresponding to the IP address and / or the destination IP address of the terminal exists; A third step of inserting a SLAF if there is a wavelength corresponding to its IP address as a result of the second step, and performing an error processing if it does not exist; A fourth step of inserting a DLAF if there is a wavelength corresponding to the destination IP address as a result of the second step and performing an error processing if it does not exist; A fifth step of inserting FL and LTIF after the third and / or fourth step; Calculating a CRC; A seventh step of error processing if the result of the sixth step is not correct; And And a sixth step of inserting the preamble and the SFD and performing an all-optical conversion to the control node of the connected sub-ring. In a WDM-based Internet Protocol Network (IPOW) in which a plurality of terminals are interconnected in a ring structure, an IP packet encapsulated in a predetermined data frame structure using wavelength information and IP address information of the network at a receiving terminal. In the method for receiving, The data frame structure is: A preamble indicating bit synchronization information between a transmitting side and a receiving side; A Start Frame Delimiter (SFD) field indicating start indication information of a frame; As a tag switching field, a LTIF (Lambda Tag ID Field) indicating 2 ⁿ number of wavelength ID information (where n is the number of wavelengths), a FL (Frame Length) field indicating full frame length information excluding the preamble and SFD, A Destination Lambda Address Field (DLAF) indicating information corresponding to the wavelength address of the destination node, a Source Lambda Address Field (SLAF) indicating information corresponding to the wavelength address of the source node, a traffic data ID, A header field including a frame type (FT) CoS field indicating information such as second layer protocol ID, OAM ID, debugging ID or reservation of DWDM, and processing priority information; An IP payload field indicating traffic data information of an IP; And And a cyclic redundancy check (CRC) field for checking the LTIF, the header field and the IP payload field, The method of receiving the IP packet is: A first step of photoelectrically converting the received packet; Removing the preamble and SFD field; A third step of performing a CRC check to correct the error if it is not correct and to remove the LTIF if it is correct; Look up the table with the wavelength information and IP address information to check if the DLAF wavelength information matches its IP address, discard the packet if it does not match, and remove the FL, DLAF, SLAF, and FT and CoS fields if they match. A fourth step of extracting an IP packet; And And passing the extracted IP packet to the IP layer through the host interface. In a wavelength division multiplex (WDM) based Internet Protocol Network (IPOW) in which a sub-ring structure in which a plurality of terminals are interconnected is connected to one main ring, wavelength information and IP address information of the network are obtained from a control node of the sub-ring. In the method for routing an IP packet encapsulated in a predetermined frame structure using, The frame structure is: A preamble indicating bit synchronization information between a transmitting side and a receiving side; A Start Frame Delimiter (SFD) field indicating start indication information of a frame; As a tag switching field, a LTIF (Lambda Tag ID Field) indicating 2 ⁿ number of wavelength ID information (where n is the number of wavelengths), a FL (Frame Length) field indicating full frame length information excluding the preamble and SFD, A Destination Lambda Address Field (DLAF) indicating information corresponding to the wavelength address of the destination node, a Source Lambda Address Field (SLAF) indicating information corresponding to the wavelength address of the source node, a traffic data ID, A header field including a frame type (FT) CoS field indicating information such as second layer protocol ID, OAM ID, debugging ID or reservation of DWDM, and processing priority information; An IP payload field indicating traffic data information of an IP; And And a cyclic redundancy check (CRC) field for checking the LTIF, the header field and the IP payload field. The method of routing the IP packet is: A first step of determining whether the received IP packet is transmitted from an originating terminal or from a control node of the main ring; If it is determined from the calling terminal as a result of step 1, then: A second step of looking up a table in which the wavelength information and the IP address information are stored and comparing whether the IP address of the control node and the wavelength information in the DLAF are the same; A third step of forwarding the IP packet to another terminal of a sub-node to which the calling terminal is connected if not identical; And As a result of the second step, if the same, the wavelength-tag including the wavelength information corresponding to the destination node is inserted into the LTIF to transfer the IP packet to a sub ring other than the sub ring to which the originating terminal is connected. Perform a fourth step of delivering to the control node, As a result of the first step, when it is determined that the transfer from the control node of the main ring, And a fifth step of looking up the table in which the wavelength information and the IP address information are stored, and delivering the IP packet to the destination node with the wavelength information corresponding to the receiving terminal in the DLAF. In a WDM-based Internet Protocol Network (IPOW) in which a sub-ring structure in which a plurality of terminals are interconnected is connected to one main ring, an IP packet encapsulated in a predetermined frame structure in a control node of the main ring. In the method of routing, The frame structure is: A preamble indicating bit synchronization information between a transmitting side and a receiving side; A Start Frame Delimiter (SFD) field indicating start indication information of a frame; As a tag switching field, a LTIF (Lambda Tag ID Field) indicating 2 ⁿ number of wavelength ID information (where n is the number of wavelengths), a FL (Frame Length) field indicating full frame length information excluding the preamble and SFD, A Destination Lambda Address Field (DLAF) indicating information corresponding to the wavelength address of the destination node, a Source Lambda Address Field (SLAF) indicating information corresponding to the wavelength address of the source node, a traffic data ID, A header field including a frame type (FT) CoS field indicating information such as second layer protocol ID, OAM ID, debugging ID or reservation of DWDM, and processing priority information; An IP payload field indicating traffic data information of an IP; And And a cyclic redundancy check (CRC) field for checking the LTIF, the header field and the IP payload field. The method of routing the IP packet is: Routing method characterized in that the destination node is identified by the wavelength-tag information included in the LTIF in the IP packet received from the control node of the sub-ring connected to the originating terminal and delivered to the control node of the sub-ring connected to the receiving terminal. On your computer, In a wavelength division multiplex (WDM) based Internet Protocol Network (IPOW) in which a sub-ring structure in which a plurality of terminals are interconnected is connected to one main ring, wavelength information and IP address information of the network are obtained from a control node of the sub-ring. In the method for routing an IP packet encapsulated in a predetermined frame structure using, The frame structure is: A preamble indicating bit synchronization information between a transmitting side and a receiving side; A Start Frame Delimiter (SFD) field indicating start indication information of a frame; As a tag switching field, a LTIF (Lambda Tag ID Field) indicating 2 ⁿ number of wavelength ID information (where n is the number of wavelengths), a FL (Frame Length) field indicating full frame length information excluding the preamble and SFD, A Destination Lambda Address Field (DLAF) indicating information corresponding to the wavelength address of the destination node, a Source Lambda Address Field (SLAF) indicating information corresponding to the wavelength address of the source node, a traffic data ID, A header field including a frame type (FT) CoS field indicating information such as second layer protocol ID, OAM ID, debugging ID or reservation of DWDM, and processing priority information; An IP payload field indicating traffic data information of an IP; And And a cyclic redundancy check (CRC) field for checking the LTIF, the header field and the IP payload field. The method of routing the IP packet is: A first step of determining whether the received IP packet is transmitted from an originating terminal or from a control node of the main ring; If it is determined from the calling terminal as a result of step 1, then: A second step of looking up a table in which the wavelength information and the IP address information are stored and comparing whether the IP address of the control node and the wavelength information in the DLAF are the same; A third step of forwarding the IP packet to another terminal of a sub-node to which the calling terminal is connected if not identical; And As a result of the second step, if the same, the wavelength-tag including the wavelength information corresponding to the destination node is inserted into the LTIF to transfer the IP packet to a sub ring other than the sub ring to which the originating terminal is connected. Perform a fourth step of delivering to the control node, As a result of the first step, when it is determined that the transfer from the control node of the main ring, A program having a program for executing a fifth step of delivering the IP packet to the destination node by loading the wavelength information corresponding to the receiving terminal in the DLAF by loading a table storing the wavelength information and the IP address information. Recordable media. On your computer, In a WDM-based Internet Protocol Network (IPOW) in which a sub-ring structure in which a plurality of terminals are interconnected is connected to one main ring, the control node of the main ring is encapsulated into a frame structure according to claim 1. In the method of routing the received IP packet, In the IP packet received from the control node of the connected sub-ring, the originating terminal identifies the destination node using the wavelength-tag information included in the LTIF and transmits the destination node to the control node of the connected sub-ring. Recorded computer-readable recording media.