KR101633454B1 - Ethernet converting apparatus of epon and method thereof - Google Patents

Ethernet converting apparatus of epon and method thereof Download PDF

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Publication number
KR101633454B1
KR101633454B1 KR1020150147593A KR20150147593A KR101633454B1 KR 101633454 B1 KR101633454 B1 KR 101633454B1 KR 1020150147593 A KR1020150147593 A KR 1020150147593A KR 20150147593 A KR20150147593 A KR 20150147593A KR 101633454 B1 KR101633454 B1 KR 101633454B1
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South Korea
Prior art keywords
epon
ethernet
frame
olt
frames
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KR1020150147593A
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Korean (ko)
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황현동
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주식회사 상록수
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0238—Wavelength allocation for communications one-to-many, e.g. multicasting wavelengths
    • H04J14/0239—Wavelength allocation for communications one-to-many, e.g. multicasting wavelengths in WDM-PON sharing multiple downstream wavelengths for groups of optical network units [ONU], e.g. multicasting wavelengths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0057—Operations, administration and maintenance [OAM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0073—Services, e.g. multimedia, GOS, QOS
    • H04J2203/0082—Interaction of SDH with non-ATM protocols
    • H04J2203/0085—Support of Ethernet

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Small-Scale Networks (AREA)

Abstract

The present invention relates to an Ethernet converting device of an Ethernet passive optical network (EPON), and a method thereof which can selectively convert specific packet data of downstream and upstream EPON frames to an Ethernet frame. The Ethernet converting device of an EPON comprises: one optical line terminator (OLT) which is installed in a backbone network; a plurality of optical network units (ONUs) which are installed in an area crowded by subscribers; a passive light distributor which distributes EPON frames transmitted between the OLT and each of the ONUs; and an Ethernet converting device which discriminates the downstream and upstream EPON frames, which are transmitted between the OLT and each of the ONUs via an optical cable, from each other, and selectively converts specific packet data into an Ethernet frame. According to the present invention, precise network management and monitoring can be performed on an EPON.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an Ethernet switching apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an Ethernet Passive Optical Network (EPON), and more particularly, to an EPON Ethernet conversion apparatus and method capable of selectively converting specific packet data of downlink and upward EPON frames into an Ethernet frame.

An Ethernet Passive Optical Network (EPON) is an Ethernet-based passive optical network for providing a broadband hybrid service that accommodates voice, data and video in a subscriber network that has been designated as a bottleneck.

Therefore, it is possible to provide high-speed broadband service of more than several tens of Mbps through the EPON related equipment in the subscriber network using the optical cable.

The EPON network, which is the next generation optical subscriber network, is a tree-like network structure in which a plurality of ONUs are connected to one OLT. Since the EPON network follows the principle of broadcast and select like a topology wireless communication, Public network entry and diffusion depends on providing adequate security.

However, there is a risk of eavesdropping by other ONUs in the downlink traffic on the topology of the EPON network, and there is a risk of accessing resources of unauthorized ONUs or camouflage by other ONUs in uplink traffic. In particular, since the EPON network uses one optical table, it is difficult to precisely monitor the collection of desired information, virus infiltration, and channel failure state check by distinguishing upward or downward traffic.

It is an object of the present invention to provide an EPON Ethernet conversion apparatus and method capable of performing micro network management and monitoring in an EPON network.

It is another object of the present invention to provide an EPON Ethernet conversion apparatus and method capable of selectively converting specific packet data of downlink and uplink EPON frames into Ethernet frames.

According to an aspect of the present invention, there is provided an Ethernet transcoder of an EPON, including: an OLT (Optical Line Terminator) installed in a backbone network; A plurality of ONUs (Optical Network Units) installed in a subscriber density area; A passive optical splitter for distributing an EPON frame transmitted through an optical cable between the OLT and each ONU; And an Ethernet transducer for determining a downward or upward EPON frame transmitted between the OLT and each ONU through the optical cable and converting the EPON frame into an Ethernet frame,

The Ethernet transcoder detects uplink and downlink EPON frames by separating the EPON frame transmitted between the OLT and each ONU by downlink or uplink frequency bands and transmits the uplink and downlink EPON frames according to the filtering information set by the operator. Extracts the specific packet data and converts it into an Ethernet frame.

According to an aspect of the present invention, there is provided an Ethernet transmission method of an EPON according to the present invention includes transmitting and receiving an EPON frame between one optical line terminator (OLT) and a plurality of ONUs through an optical cable and an optical distributor ; Detecting uplink and downlink EPON frames by separating the transmitted and received EPON frames by downlink or uplink frequency bands; Discarding the MPCP frame and the OAM frame in the detected downlink and uplink EPON frames, separating only the pure data frames and converting them into Ethernet frames; And extracting specific packet data according to the filtering information set by the operator in the converted Ethernet frame.

The present invention determines an upstream or downstream EPON frame transmitted between an OLT and a plurality of ONUs through an optical transmission path (eg, optical cable) in a PON network, and transmits a desired data packet in the determined upstream or downstream EPON frame It is easy to check inflow of viruses and channel failure state by converting the data into an Ethernet frame by filtering, and it is very easy to identify and monitor data.

In addition, the present invention detects a specific MAC address or an IP address when converting an uplink or downlink EPON frame into an Ethernet frame, thereby detecting an interface problem (such as a problem of serial connection in a semiconductor chip, , Data overhead problem) can be prevented.

1 is a block diagram of a general EPON.
FIGS. 2 and 3 are diagrams illustrating an operation of transmitting and receiving frame data through the downlink channel and the uplink channel of the EPON. FIG.
4 is a configuration diagram of an Ethernet conversion apparatus of an EPON according to the first embodiment of the present invention;
5 is a detailed configuration diagram of a monitoring unit according to the present invention;
6 is a detailed configuration diagram of an Ethernet converter according to the present invention;
7 is a flowchart illustrating an Ethernet conversion method of an EPON according to the present invention;
8 illustrates an example of converting an EPON frame into an Ethernet frame in the present invention.
9 is a configuration diagram of an Ethernet conversion apparatus of an EPON according to a second embodiment of the present invention;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like or similar elements are denoted by the same reference numerals, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In general, there is a risk of eavesdropping by the ONUs in the topology downlink traffic in the EPON network, and there is a risk of the access by the unauthorized ONUs or camouflage by other ONUs in the uplink traffic. In the conventional transmission equipment, the transmission line and the reception line are distinguished, and it is possible to check whether the transmission line and the reception line are abnormal through the measuring instrument, and to monitor the line connection state by using the link monitoring through the bridge connection.

However, since the EPON frame is transmitted and received between the OLT and a plurality of ONUs through one optical transmission path (eg, optical cable) in the EPON network, the uplink or downlink EPON frame is discriminated and the inflow of the virus and the channel failure state are checked It is very difficult to identify and monitor user data.

In the EPON network, an upstream or downstream EPON frame transmitted between an OLT and a plurality of ONUs is identified through one optical transmission path (eg, optical cable, optical fiber) We propose a method to convert a packet (user data) into an Ethernet frame by filtering.

Further, the present invention is provided in the 'network information remote collection system and method', which is registered by the applicant of the present invention on Oct. 5, 2012 (Application No. 10-2012-0110890) , Detailed user information can be analyzed.

1 is a block diagram of a general EPON.

Referring to FIG. 1, the EPON includes an OLT (Optical Line Terminator) 100 located in the office of a network operator and connecting a backbone network and a subscriber network, and a plurality A plurality of ONUs 200-1 to 200-N are connected to the OLT 100 to form a distributed topology of a tree structure, And a passive optical splitter (eg, an optical splitter) 300 for branching the data by 1 × N and distributing the data to a plurality of ONUs 200-1 to 200-N. Here, the term "passive" means that when light is divided, the light is divided into 1: N without external power supply.

Also, instead of the ONUs 200-1 to 200-N, a plurality of subscriber (or user) terminals (ONTs) located in the home of each subscriber may be used. Also, at least one subscriber terminal (ONT) located in the home of each subscriber may be accommodated in the ONUs 200-1 to 200-N.

FIGS. 2 and 3 illustrate operations of transmitting and receiving frame data through the downlink channel and the uplink channel of the EPON.

As shown in FIG. 2, the EPON frame transmitted from the OLT 100 in the downlink channel is broadcast to all the ONUs 200-1 through 200-3 via the passive optical splitter 300. FIG. Each of the ONUs 200-1 to 200-3 receives only the EPON frame that matches the logical link identifier (LLID) assigned thereto and discards the remaining EPON frames.

3, all the EPON frames transmitted by the ONUs 200-1 to 200-3 in the upstream channel are received by the OLT 100, and the OLT 100 is included in the transmitted EPON frame It is possible to know which ONU frame is transmitted through the LLID value.

In the EPON, a protocol called Multi-Point Control Protocol (MPCP) is used in the MAC control layer to process a protocol related to the EPON. To this end, an MPCP frame is transmitted to the OLT 100 and the ONUs 200-1 to 200- 200-3. The MPCP protocol uses a logical link identifier (LLID) to provide point-to-point communication between the OLT and the ONU and broadcast functions to other ONUs in the ONU. The LLID value is a value assigned to the corresponding ONU through an auto-disconnection process in which an ONU is firstly connected to the EPON, and is used to distinguish the logical link between the OLT and the ONU . In EPON, frame-based OAM (Maintenance, Operation, Administration and Maintenance) is performed using OAM frames.

On the other hand, EPON can provide Time Division Multiple Access (TDMA) for the uplink channel as shown in FIG. When an ONU transmits an EPON frame to an OLT, traffic can be collided because several ONUs can overlap and transmit. In order to avoid such collision, the MPCP protocol shares the uplink channel through the time division multiple access scheme. That is, in the EPON, the OLT determines the start time and the length to be transmitted to the ONUs, and the ONUs transmit data only during the allocated time.

4 is a configuration diagram of an Ethernet transcoder of EPON according to the first embodiment of the present invention.

Referring to FIG. 4, the Ethernet transcoder of the EPON according to the first embodiment of the present invention includes an OLT 100 for connecting a backbone network and a subscriber network, a plurality of ONUs 200- And a plurality of ONUs 200-1 to 200-N for connecting the OLT 100 to a plurality of ONUs 200-1 to 200-N and for distributing the EPON frame to a plurality of ONUs 200-1 to 200- An EPON frame located between the OLT 100 and the passive optical distributor 300 and transmitted between the OLT 100 and each of the ONUs 200-1 to 200-N via an optical cable, And an Ethernet converter 400 for converting the Ethernet frame into an Ethernet frame.

The plurality of ONUs 200-1 to 200-N may be replaced with a plurality of subscriber (or user) terminals (ONTs).

The Ethernet transcoder 400 includes a monitoring unit 401 for monitoring upward and downward EPON frames among EPON frames (traffic) transmitted between the OLT 100 and the ONUs 200-1 to 200-N, And an Ethernet converting unit 402 for converting the upward and downward EPON frames separated by the metering unit 401 into Ethernet frames.

The monitoring unit comprises a core optical tap and separates the EPON frame transmitted / received through the optical transmission line (optical cable and optical fiber) by the downlink or uplink frequency band without traffic loss to detect the downlink EPON frame and the uplink EPON frame do.

The Ethernet converter 402 discards the MPCP frame and the OAM frame in the upward and downward EPON frames monitored by the monitoring unit 401, separates only pure data frames, and converts the Ethernet frames into Ethernet frames.

5 is a detailed configuration diagram of a monitoring unit according to the present invention.

Referring to FIG. 5, the monitoring unit 401 may include first and second network ports A and B and first and second monitoring ports C and D, respectively. Therefore, the EPON frame output from the OLT 100 is transmitted to the ONU 100 via the first network port A and the second network port B, and the EPON frame output from the ONU 100 is transmitted to the second The network port B, and the first network port A to the ONU 100. At this time, the monitoring port C separates the downward wavelength of 1490 nm of the EPON frame inputted through the first network port A or the second network port B, outputs the downlink EPON frame transmitted to the corresponding wavelength, The monitoring port D separates the upstream wavelength of 1310 nm of the EPON frame inputted through the first network port A or the second network port B and outputs an upstream EPON frame transmitted to the corresponding wavelength.

6 is a detailed configuration diagram of an Ethernet converter according to the present invention.

6, the Ethernet converter 402 according to the present invention includes an EPON filter module 40 for converting the downlink and uplink EPON frames detected by the monitoring unit 401 into Ethernet frames, And an Ethernet filter module 50 for extracting specific packet data according to the filtering information set by the operator in the Ethernet frame converted in the Ethernet frame. The filtering information includes a MAC address or an IP address set by the operator.

The EPON filter module 40 includes an EPON header check unit 41 for checking whether the downlink and uplink EPON frames detected by the monitoring unit 401 are defective or not, An EPON filter unit 42 for removing the MPCP frame and the OAM frame used in the network and an E-MAC control unit 43 for reconfiguring the EPON frame output from the EPON filter unit 42 into an 802.3 Ethernet frame.

The Ethernet filter module 50 includes an Ethernet MAC 51 for receiving an Ethernet frame output from the EPON filter module 40 and an Ethernet module 51 for receiving an Ethernet frame from the Ethernet MAC 51 according to filtering information set by the operator An Ethernet filter 52 for filtering specific packet data (MAC address, IP address), an access device 53 for transmitting the packet data filtered by the Ethernet filter 52 to a user side or a separate network information collecting device ) (eg, PHY).

The specific packet data is information specifying the type of data to be collected and target information, and may include voice data such as telephone or Internet telephony (VoIP), image data such as photographs and images, and text data such as e-mail .

Hereinafter, the operation of the Ethernet transcoder of the EPON according to the present invention will be described with reference to the accompanying drawings.

FIG. 7 is a flowchart illustrating an Ethernet conversion method of an EPON according to the present invention, and FIG. 8 illustrates an example of converting an EPON frame into an Ethernet frame.

7, the EPON frame is transmitted / received between the OLT 100 and the ONUs 200-1 to 200-N through the passive optical splitter 300 (S100). That is, the transmitter of the OLT 100 converts the EPON frame into an optical signal with a wavelength of 1490 nm, and the EPON frame converted into the optical signal is transmitted to the plurality of ONUs 200-1 to 200-N through the optical cable and the distributor 300, Lt; / RTI > On the other hand, the transmitter of each ONU 200-1 to 200-N converts an EPON frame into an optical signal with a wavelength of 1310nm in the burst mode, and the PON frame converted into the optical signal is transmitted to the OLT (100).

The monitoring unit 401 of the Ethernet transducer 400 located between the OLT 100 and the passive optical distributor 300 may be a 1:16 or 4/4 optical fiber cable connected to the OLT 100 through one optical cable 1:32 monitors the bi-directional frame to monitor the EPON frame transmitted to the subscriber. For example, the monitoring unit 401 may detect the uplink EPON frame and the downlink EPON frame based on the wavelength of the optical signal flowing through the optical cable (S110). If the wavelength of the optical signal is 1490 nm, the monitoring unit 401 determines that the EPON frame is a downward EPON frame. If the wavelength of the optical signal is 1310 nm, the monitoring unit 401 determines the uplink EPON frame. The detected uplink EPON frame or the downlink EPON frame is output to different ports (S120 to S140). For example, the uplink EPON frame may be output to the first monitoring port and the downlink EPON frame may be output to the second monitoring port .

The uplink EPON frame and the downlink EPON frame detected by the monitoring unit 401 are transmitted to the Ethernet converter 402. The EPON filter module 40 of the Ethernet converter 402 converts the downlink and uplink EPON frames detected by the monitoring unit 401 into Ethernet frames. That is, the EPON header check unit 41 of the EPON filter module 40 checks whether the detected downward or upward EPON frame is defective, and the EPON filter unit 42 checks whether the EPON frame The E-MAC control unit 43 separates the MPCP frame and the OAM frame used in the network into the EPON header and the Ethernet frame, To form an 802.3 Ethernet frame (S160).

The constructed Ethernet frame is transmitted to the Ethernet filter module 50. The Ethernet filter module 50 extracts only a frame of a specific MAC address or IP address from the Ethernet frame converted by the EPON filter module 40 and outputs the extracted frame. That is, the Ethernet filter unit 52 receives the Ethernet frame output from the EPON filter module 40 through the Ethernet MAC 51, and extracts only the packet data corresponding to the filtering information set by the operator from the Ethernet frame. The filtering information includes a MAC address and an IP address.

The data packet corresponding to the filtering information may include voice data such as telephone or Internet telephony (VoIP), image data such as photographs and images, and text data such as e-mail. That is, the Ethernet filter unit 52 extracts packet data of a MAC or IP address necessary for preventing a packet drop due to overhead when the Ethernet transcoder 400 is interfaced with a separate network collecting apparatus So that the maximum capacity of the network collecting apparatus can be maintained at 1 Gbps.

Therefore, the packet data filtered by the Ethernet filter unit 52 is transmitted to the user side or the separate network information collecting apparatus via the access device 53. [

9 is a configuration diagram of an Ethernet transcoder of EPON according to the second embodiment of the present invention.

Referring to FIG. 9, the Ethernet transcoder of the EPON according to the second embodiment of the present invention is configured by connecting the Ethernet transcoder 500 to the end of the optical cable, that is, the OLT 100. The Ethernet transcoder 500 mirrors the bi-directional frame to monitor frames transmitted to 1:16 or 1:32 subscribers connected to one optical cable in the OLT 100. The port for mirroring is a line card not used in the OLT 100, and the Ethernet transcoder 500 is directly connected to the line card to receive the mirrored EPON frame.

The Ethernet transcoder 500 includes a monitoring unit 501 for monitoring upward and downward EPON frames among EPON frames (traffic) mirrored by the line cards of the OLT 100, And an Ethernet converter 502 for converting the uplink and downlink EPON frames into an Ethernet frame. The configuration of the Ethernet converter 502 is the same as that of FIG.

Accordingly, the monitoring unit 501 detects the downlink EPON frame and the uplink EPON frame by separating the mirrored EPON frame by the line card for each of the downlink or uplink frequency bands, and the Ethernet converter 502 converts the detected uplink or downlink EPON The MPCP frame and the OAM frame are discarded in the frame, and only the pure data frame is separated and converted into an Ethernet frame.

As described above, the present invention determines upstream or downstream EPON frames transmitted between an OLT and a plurality of ONUs through one optical transmission path (eg, optical cable) in a PON network, and determines whether uplink or downlink EPON frames The desired data packet is filtered and converted into the Ethernet frame, so that it is easy to check the inflow of the virus and the channel failure state, and it is very easy to identify and monitor the data.

Further, according to the present invention, when an uplink or downlink EPON frame is converted into an Ethernet frame, a specific MAC address or an IP address is detected and detected, thereby causing an interface problem (a problem of serial connection in a semiconductor chip, Data overhead problem) can be prevented.

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer readable medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, , And may also be implemented in the form of a carrier wave (e.g., transmission over the Internet). Also, the computer may include a control unit 180 of the terminal. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

40: EPON filter module 50: Ethernet filter module
100: OLT 200-1 to 200-N: ONU
300: Passive optical distributor 400, 500: Ethernet converter
401, 501: monitoring unit 402, 502: Ethernet conversion unit

Claims (13)

One OLT (Optical Line Terminator) installed in the backbone network;
A plurality of ONUs (Optical Network Units) installed in a subscriber density area;
A passive optical splitter for distributing an EPON frame transmitted through an optical cable between the OLT and each ONU; And
And an Ethernet transducer for determining a downward or upward EPON frame transmitted between the OLT and each ONU through the optical cable and converting the EPON frame into an Ethernet frame,
The Ethernet transcoder
Separating the identified downlink or uplink EPON frame into an EPON header and an Ethernet frame, and then removing the MPCP frame and the OAM frame, which are control messages, and converting the separated EPON header into an Ethernet frame by replacing the separated EPON header with a preamble. Of the Ethernet converter. The apparatus of claim 1, wherein the Ethernet transcoder
Wherein the OLT is connected to an optical cable between the OLT and the passive optical splitter. The apparatus of claim 1, wherein the Ethernet transcoder
And the OLT is connected to the line card of the OLT. The apparatus of claim 1, wherein the Ethernet transcoder
A monitoring unit for detecting uplink and downlink EPON frames by separating EPON frames transmitted between the OLT and each ONU by downlink or uplink frequency bands; And
And an Ethernet converter for converting the uplink and downlink EPON frames detected by the metering unit into Ethernet frames. delete 5. The apparatus of claim 4, wherein the Ethernet converter
An EPON filter module for converting the downlink and uplink EPON frames detected by the monitoring unit into Ethernet frames; And
And an Ethernet filter module for extracting specific packet data according to filtering information set by an operator in the Ethernet frame converted by the EPON filter module. 7. The apparatus of claim 6, wherein the EPON filter module
An EPON header check unit for checking whether the downlink and uplink EPON frames detected by the monitoring unit are defective;
An EPON filter unit for separating the examined EPON frame into an EPON header and an Ethernet frame and removing an MPCP frame and an OAM frame used in a network; And
And an E-MAC controller for reconfiguring an 802.3 Ethernet frame by adding a preamble to the Ethernet frame separated by the EPON filter unit. 7. The apparatus of claim 6, wherein the Ethernet filter module
An Ethernet MAC receiving an Ethernet frame output from the EPON filter module;
An Ethernet filter unit for extracting specific packet data from the Ethernet frame input through the Ethernet MAC according to the filtering information set by the operator; And
And an access unit for transmitting the packet data extracted by the Ethernet filter unit to a user side or a separate network information collecting apparatus. 9. The method of claim 8,
This is the MAC address or IP address set by the operator.
The specific packet data
Wherein the data includes text data such as voice data such as telephone or Internet telephony (VoIP), image data such as photographs and video, and e-mail. Transmitting and receiving an EPON frame between one optical line terminator (OLT) and a plurality of ONUs (Optical Network Units) through an optical cable and an optical distributor;
Detecting an uplink EPON frame and a downlink EPON frame by separating the EPON frame to be transmitted and received according to a downlink frequency band or an uplink frequency band;
Discarding the MPCP frame and the OAM frame in the detected downlink and uplink EPON frames, separating only the pure data frames and converting them into Ethernet frames; And
And extracting specific packet data according to the filtering information set by the operator in the converted Ethernet frame,
The step of converting into the Ethernet frame
Checking whether the detected downlink and uplink EPON frames are defective;
Separating the checked EPON frame into an EPON header and an Ethernet frame, and removing an MPCP frame and an OAM frame used in a network; And
And reconfiguring an 802.3 Ethernet frame by replacing the separated EPON header with a preamble. 11. The method of claim 10,
The information set by the operator includes the MAC address or IP address,
The specific packet data
Information specifying the type and object of data to be collected, and includes text data such as voice data such as telephone or Internet telephone (VoIP), image data such as photograph and video, and e-mail. Way. 11. The method of claim 10, wherein the EPON frame
And branching at the optical cable between the OLT and the passive optical splitter or being mirrored in the OLT. delete
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KR20070115131A (en) * 2006-05-30 2007-12-05 옵시스테크놀로지 주식회사 Ethernet interface appatarus for fiber line monitoring data

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KR20050076263A (en) * 2004-01-20 2005-07-26 삼성전자주식회사 Optical line terminal(olt) for managing link status of optocal network units(onus) and gigabit ethernet passive optical network(ge-pon) appling the same
KR20050081132A (en) * 2004-02-11 2005-08-18 한국전자통신연구원 System for servicing broadcasting data in passive optical network and method thereof
KR20070115131A (en) * 2006-05-30 2007-12-05 옵시스테크놀로지 주식회사 Ethernet interface appatarus for fiber line monitoring data

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