JP2002314567A - Optical access communication equipment, photoelectric converter device, router and fault notice method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for simplifying network management in a communication network adopting the IEEE 802 standards, for providing a service of high-speed large capacity data to a wide range and for fault management with high reliability. SOLUTION: A router is installed in an accommodating station, a photoelectric converter device is installed at a subscriber's house, and an optical interface is employed for a physical interface between the router and the photoelectric converter device. Furthermore, the photoelectric converter device informs the router about a fault state by transmitting a frame a MAC(media access control) header of which is specified with a destination address, a sender address, or a type/length in accordance with the IEEE 802 standards.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an optical access communication technology for providing an optical access service in a communication network.

[0002]

2. Description of the Related Art With the rapid spread of the Internet, information in the world is rapidly increasing. The amount of information in the carrier backbone is also expected to increase 100-1000 times in the coming years. As the carrier IP network configuration, IPo
ver ATM, IP over SONET / SDH, IP ove
r A network configuration such as WDM is being considered, and a large-capacity communication network is being provided. Further, in the most familiar access network directly connected to a home or office, various media such as a telephone line (twisted pair line), a CATV (coaxial cable), and a wireless (radio wave) have been used. But also
An optical fiber is installed in a subscriber's house by FTTH (Fiber To The Home) technology using an optical fiber to provide a high-speed optical communication service. In such a background, in the conventional network configuration, a dedicated line communication service is provided in addition to an ISDN communication service having an interface specified by I.430 of the International Telecommunication Union (ITU-T) recommendation. As an optical access service mode for subscribers, there is an optical subscriber system using the PDS system, a typical example of which is described in FIG. 24 of Japanese Patent Application No. 9-233103. In addition, networks of subscriber companies, universities, public institutions, etc. are based on LA using the IEEE 802 standard.
N (Local Area Network) is formed. There are various protocols for managing a network of information communication equipment forming a LAN, and a typical management protocol is RFC.
IETF of the organization that issues (Request For Comments)
(Internet Engineering Task Force) SN
MP (Simple Network Management Protocol) protocol, CMIP (Common Man Management) used as OSI network management protocol which is open system management
agement Information Protocol). The information device management in these LAN networks is a configuration in which a destination (IP address) is assigned to each information communication device and the network is managed by the SNMP protocol.

[0003]

When a conventional optical access service is constructed on a communication network using the IEEE 802 standard, the optical access service is defined by the IEEE 802 standard.
The transmission distance of 0Base-FX is defined as 2 km, and transmission over a longer distance is impossible. Also, SNMP, which is a conventional LAN network management protocol,
Is applied to the network management of the optical access service, it is necessary to assign an IP address as a destination to each of the information communication equipment installed at the subscriber's house.
You have to manage addresses. Further, since the number of information communication devices increases and decreases as the number of subscribers in the network increases and decreases, complicated management including addition and deletion of the IP address is required. The problem of the present invention is that (1) IE
In providing the above-mentioned service in a communication network using the EE802 standard, it is not necessary to assign an IP address to each information communication device installed in a subscriber's house, and network management can be simplified; (2) Fault management (monitoring, maintenance,
Test) is possible. An object of the present invention is to provide a technique capable of solving such a problem.

[0004]

According to the present invention, there is provided an optical access communication apparatus utilizing the IEEE 802 standard, comprising: a router installed at an accommodation station; and a router installed at a subscriber's house. And a physical interface between the router and the photoelectric converter is an optical interface. (2) In the above (1), the physical interface is the G.264 standard recommended by the International Electrical Union. 957 S-1.1, L-
1. Use a standard optical interface. (3) In (1) above, the router is an IEEE 8
Destination address in the MAC header specified in the 02 standard
(DA) is fixed to ALL0, the source address (SA) is the MAC address of the router, and the TYPE / LEMNGTH length is A.
The frame fixed to LL1 is transmitted to the photoelectric conversion device, and the photoelectric conversion device is controlled or monitored. (4) As an optical-electrical conversion device used in an optical access communication device using the IEEE 802 standard, it is installed on the subscriber side, connected to a router on the accommodation station side by an optical interface, and included in a MAC header defined by the standard. Destination address (DA), Source address (SA), or TYPE
By transmitting a frame defining the / LENGTH length to the router side, the router is notified of its own failure state. (5) As a router used in an optical access communication device using the IEEE 802 standard, the router is installed on the accommodation station side, connected to the optical-to-electrical conversion device on the subscriber side by an optical interface, and included in a MAC header defined by the standard. Destination address (DA), Source address (SA), or TYPE
By transmitting a frame defining the / LENGTH length to the photoelectric conversion device side, the photoelectric conversion device is controlled and monitored. (6) As a method of notifying a router from a photoelectric conversion device to a router in an optical access communication device using the IEEE 802 standard, a destination address (DA) in a MAC header defined by the standard is fixed to ALL1 or the router's address. M
The source address (SA) is set to ALL as an AC address.
0, fixing the TYPE / LENGTH length as ALL1 fixed, and transmitting the defined frame from the subscriber-side photoelectric converter to the router on the accommodation station side. The router is notified of the failure state on the side.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a network configuration diagram of an optical access communication system as an embodiment of the present invention. The physical interface between the accommodation station A (drawing code 1) and the subscriber's home A (2) is based on the International Telecommunication Union (ITU-T) recommended G. 957 S-
An optical-electrical conversion device A (40) having an optical interface conforming to the 1.1 and L-1.1 standards is provided to the accommodation station A (1) as a physical interface on the subscriber side by the International Telecommunication Union (ITU-
T) Recommendation G. A router A (10) having an optical interface of the 957 S-1.1 and L-1.1 standards, a monitoring and control device (30) for managing a fault in this network, and a device for connecting the accommodation station A (1) include And a communication network configuration using the IEEE 802 standard that enables connection to the Internet by installing a multiplex terminal device or a wavelength multiplexing device A (20). That is, the physical interface between the accommodating station A (1) and the subscriber's home A (2) is provided in accordance with ITU-T recommended G.104. 957 S-1.1, L-
Router A (10) equipped with 1.1 standard optical module
And the optical-electrical conversion device A (40), it is possible to connect the accommodation station and the subscriber's house with an optical fiber, and the transmission distance between the accommodation station and the subscriber's house is 15 km or 4 km.
0 km and 1 specified by IEEE802 standard
It is possible to configure a communication network capable of transmitting data over a longer distance than the transmission distance of 00Base-FX of 2 km.

FIG. 2 shows a personal computer A in a subscriber's home A (2).
FIG. 3 is an explanatory diagram of a specific data flow when connecting to the Internet from the Internet. FIG. 2 shows an example of a configuration in which a concentrator A (50) for integrating a plurality of photoelectric conversion devices is installed in addition to the configuration of FIG. The personal computer A in the subscriber's home A (2) has a MAC defined by the IEEE802 standard.
The destination address in the header is converted to the photoelectric conversion device A (40).
MAC address and source address of PC A
A data is transmitted to the photoelectric conversion device A (40) as a MAC header A with a C address. Upon receiving the data, the photoelectric conversion device A (40) converts the electric signal into an optical signal, and converts the destination address in the MAC header A into the MAC address of one port of the concentrator A (50) and the transmission source address into the optical signal. MA of the port that the electric conversion device A (40) transmits
C address and MAC header B as concentrator A (5
0) is transmitted. Similarly, the line concentrator A (50) sets the destination address in the MAC header to the router A (1).
The MAC address and the source address of one port of 0) are set as the MAC address of the port transmitted by the line concentrator A (50), and the data is transmitted to the router A (10) as the MAC header C. The router A (10) transmits the destination IP address in the IP header A of the received data and the router A
The MAC address of the transmission destination of the received data is searched from the routing table in (50). Data frame conversion is not performed between the subscriber home A (2) and the accommodation station A (1). After the transmission destination is determined, the retrieved MAC address is set as the transmission destination address in the MAC header, and the transmission source address is set as the MAC address of the port to which the router A (50) transmits, and the data is transmitted as the MAC header D. The transmitted data is connected between the accommodating stations via the wavelength multiplexing device A or the multiplex converter A (20) installed in the accommodating station, and is connected to the Internet at an access point with a provider in the Internet network. I do.

Hereinafter, means for simplifying network management (monitoring, maintenance, testing) in the optical access communication system of the present invention will be described. FIG. 3 is a configuration example of a frame using a MAC header. From the router A (10) installed in the accommodation station A (1) in FIG. 1, the subscriber's home A (2)
As a frame to be transmitted to the photoelectric conversion device A (40) installed in the inside, the transmission destination address (DA) in the MAC header of FIG. 3 is fixed to ALL0 and the transmission source address (S
A) is the MAC address of router A (10), TYPE /
By defining and transmitting a frame in which LENGTH is fixed to ALL1, the photoelectric conversion device A (40) installed in the subscriber home A (2) determines that the frame is transmitted from the router A (10). It becomes possible. Also,
Photoelectric conversion device A installed in subscriber's home A (2)
Router A installed in accommodation station A (1) from (40)
As the frame to be transmitted to (10), the destination address (DA) in the MAC header is fixed to ALL1 or the MAC address of router A (10), the source address (S
A) is fixed to ALL0, TYPE / LENGTH is set to ALL
By specifying 1 fixed, the router A (10) installed in the accommodation station A (1) is transmitted from the photoelectric conversion device A (40) installed in the subscriber home A (2). Frame can be determined. Further, the detailed contents of the frame are described in a portion describing the various protocols by dividing the frame type and the command as maintenance data describing the contents of the frame transmitted by the router A (10) and the photoelectric conversion device A (40). It can be described. That is, instead of the maintenance person assigning an IP address to each information communication device and monitoring each device by the SNMP protocol as in the related art, the router A (10) is installed at the subscriber's house in this system. The photoelectric conversion device grasps the state of each device, and the monitoring control device A (3
Network management can be performed by outputting a message of the state of the photoelectric conversion device to 0). Simple network management can be performed without performing complicated IP address management.

FIGS. 4, 5 and 6 are explanatory diagrams of the parts described as maintenance data in FIG.
FIG. 4 shows frame types and command contents described as maintenance data in FIG. As the frame type,
It is divided into three types: request, response, and notification. The router A (10) can control the photoelectric conversion device A (40) by the request frame of the frame type. Also,
The notification frame makes it possible for the router (10) to grasp the failure state of the photoelectric conversion device A (40), and to notify the monitoring control device A (30) of the failure message of the photoelectric conversion device. Become. Furthermore, the details of the request / response / notification frame are described in the command section, and the setting commands (remote loopback setting request and remote loopback setting release request) to the photoelectric converter and the status of the photoelectric converter are monitored. Command (status notification request),
By separating the command for notifying the failure content of each part in the photoelectric conversion device and the response command of the router A (10) to the notification command, the photoelectric conversion device A (4
The router A (10) can grasp the control contents of 0) and the detailed failure. The meaning and use of each frame of the maintenance data are as follows. The request frame remote loopback setting request / setting release request frame is a frame for controlling the loop formation / release on the subscriber side in the photoelectric conversion device A (40) from the router A (10). As a result, a loop is formed between the router A (10) and the photoelectric conversion device A (40) in FIG. 1, and the test data is transmitted from the router (10).
Test (loopback test) of optical transmission line (300)
Can be performed. The status request frame is a frame that is periodically transmitted from the router A (10) and is used to grasp the status of the loop SW in the photoelectric conversion device and the details of the failure. This enables the router A (10) to grasp the detailed status of each photoelectric conversion device, and monitors the network by outputting the status of the photoelectric conversion device to the monitoring control device A (30) as a message. It becomes possible. The response frames are individual response frames to the request frame and the notification frame transmitted by the router A (10) or the photoelectric conversion device A (40). This allows
It is possible to grasp that a device (router A (10) or photoelectric conversion device A (40)) facing a frame transmitted by router A (10) or photoelectric conversion device A (40) has received the frame. And the frame is not missed between the devices. That is, reliable network monitoring can be performed. The notification frame is a frame for notifying the failure site of the photoelectric conversion device A (40).
That is, the optical input of the optical transmission line (300) on the accommodation station side of the photoelectric conversion device A (40) is interrupted, the failure of the user side transmission line (400) inside the subscriber's house, the inside of the photoelectric conversion device A (40). It is possible to notify the router A (10) of an individual failure such as a failure of the optical communication device A (40) or a power-off of the photoelectric conversion device A (40).

FIG. 5 shows a format of the status notification response frame described in FIG. The 8 bytes from the beginning of the DATA / PAD portion of the frame according to the present invention are divided into a 2-byte configuration from the SW state inside the photoelectric converter, the OPT (optical) IN state on the router side, the IN state on the user side, and the state inside the photoelectric converter. Then, a response is returned to the router A (10) installed in the accommodation station A (1) about the state of the photoelectric conversion device. That is, the router A (10) can grasp the detailed state of the photoelectric conversion device by periodically monitoring the state.

FIG. 6 shows the state of the SW inside the photoelectric conversion device in the status notification response frame shown in FIG.
The (light) IN state, the user-side IN state, and the internal state of the photoelectric conversion device are shown. The upper 1 Byte of the status content having a 2-byte configuration is described as a description indicating a part of the photoelectric conversion device, a description indicating an interface type on the user side, a lower 1 Byte.
Byte indicates the failure state of the photoelectric converter, 00 indicates normal, 0
By separating the description other than 0 from the description indicating the failure, it is possible to notify the detailed failure state of the part of the photoelectric conversion device. As a result, the router A (10) can notify the supervisory control device A (30) of the detailed information as a message. The operation for network management (monitoring, maintenance, testing) in a system using the above-described frame (FIGS. 3 to 6) of the present invention will be described with reference to a sequence diagram.

FIG. 7 shows a sequence diagram of a signal communication test and a remote loopback test of the optical transmission line (300) between the router A (10) and the photoelectric conversion device A (40) in FIG. A command is input from the monitoring control device A (30), and the router A (10) transmits a remote loopback setting request frame to the photoelectric conversion device A (40). At this time, the response monitoring timer of the response frame is set to the router A (1).
Start on the 0) side. Upon receiving the remote loopback setting request frame, the photoelectric conversion device A (40) terminates the received frame in the photoelectric conversion device A (40) without transmitting the frame to the lower order user side (personal computer A side). . The photoelectric conversion device A (40) forms a loop on the user side in the device and transmits a remote loopback setting completion response frame to the router A (10). Router A (10)
Stops the response monitoring timer when it receives the remote loopback setting completion response frame in the response monitoring timer. If the response monitoring timer times out, retry again. The retry is performed, for example, three times. If there is no response even after the three times, the response monitoring timer is stopped, the remote loopback setting request frame transmission process is completed, and the monitoring control device A (30) is Conversion device A
A message that the remote loopback setting of (40) is impossible is notified as a message. Photoelectric conversion device A (40)
After the remote loopback setting is completed, router A (1
0) transmits a data frame for a remote loopback test. That is, the test data transmitted by the router A (10) is compared with the received test data, and the optical transmission is performed based on the number of frame errors resulting from the comparison and the number of test data frame responses received by the router A (10). It is possible to confirm the signal communication state of the road (300). At the end of the remote loopback test, a command is input from the supervisory control device A (30), and the router A (10)
Transmits a remote loopback setting release request frame to the photoelectric conversion device A (40). At this time, the response monitoring timer is started as in the case of the remote loopback setting request frame. The photoelectric conversion device A (40) releases the loop in the photoelectric conversion device by the received remote loopback setting release request frame, and the router A (10).
Sends a remote loopback setting release completion frame to the The router A (10) stops the response monitoring timer according to the remote loopback setting release completion frame received in the response monitoring timer, transmits a remote loopback setting release message to the monitoring control device A (30), and performs a test. To end.

FIG. 8 is a sequence diagram when the power of the photoelectric conversion device is turned off. Photoelectric conversion device A (4
If 0) is turned off by the user or turned off due to a power failure, the photoelectric conversion device A (40) transmits a power-off notification frame to the router (10) continuously within a certain period of time, The power supply of the photoelectric conversion device A (40) is turned off. Upon receiving the power-off notification frame once, the router (10) notifies the monitoring control device A (30) of a message prompting that the power of the photoelectric conversion device A (40) has been turned off. Thus, it is possible to confirm that the power of the photoelectric conversion device A (40) has been turned off due to a user, a power failure, or the like.

FIG. 9 is a sequence diagram when the router A (10) periodically monitors the state of the photoelectric conversion device A (40). The status notification request frame is periodically transmitted from the router A (10) to the photoelectric conversion device A (40).
The photoelectric conversion device A (40) terminates the received status notification request frame, and does not transmit the frame to the user (personal computer A) lower than the photoelectric conversion device A (40). The photoelectric conversion device A (40) forms the status notification response frame described in FIGS. 5 and 6, and the photoelectric conversion device A (40).
Is transmitted to the router A (10). The router A (10) receives the status notification response frame transmitted by the photoelectric conversion device A (40), decodes the contents of the frame, and instructs the supervisory control device A (30) to perform the photoelectric conversion device A (4).
The state of 0) is transmitted by a message, and the maintenance person is notified of the state of the photoelectric conversion device A (40). That is, router A
(10) It becomes possible to monitor the state of the photoelectric conversion device more regularly.

FIG. 10 shows a sequence diagram of a notification frame (all notification frames except for a power-off notification frame) at the time of occurrence / recovery of a failure of the photoelectric conversion device A (40).
The optical-electrical conversion device A (40) performs the operations shown in FIGS.
Is transmitted to the router A (10). When transmitting a frame, the photoelectric conversion device A (40) starts a response monitoring timer for a notification frame to be transmitted. The router A (10) decodes the received notification frame (the notification frame from the photoelectric conversion device A (40 in FIG. 10 is a user-side failure detection notification frame), and determines the content of the failure in the monitoring control device A (30). ). As shown in FIG. 10, when the response frame is not received by the photoelectric conversion device A (40), that is, when the response monitoring timer has timed out, the failure notification frame is transmitted again. The frame notifying the failure of the photoelectric conversion device A (40) is transmitted until the photoelectric conversion device A (30) receives a response frame of the transmitted notification frame. According to this notification method, the failure notification frame of the photoelectric conversion device A (40) is transmitted to the router (10).
Can send a message to the supervisory control device A (30) without fail, and notify a maintenance person or the like.

FIG. 11 is a schematic block diagram of a photoelectric conversion device having the above functions. Photoelectric conversion device A (40)
PHY from the transmission line (400) of port 1
In order to check the accuracy of the received frame, the CRC calculation is checked. If the CRC calculation does not match, the frame is discarded, and the filtering process can be performed. If the received frame is normal, the frame to be transmitted is temporarily stored in a buffer memory in the device via the SW unit (40-b), and the PHY 2
(40-e) via the International Electricity Union (ITU-T) Recommendation G. 957 S-1.1, L-1.1 compliant O / E and E / O conversion (40-f) to convert an electrical signal in the device into an optical signal, Send to Conversely, the frame from the optical transmission line (300) is O /
The optical signal is converted into an electric signal inside the device by E / E / O conversion (40-f) and received by the PHY 2 unit. For the frame received by the PHY2 part (40-e), the CRC calculation is checked to check the accuracy of the received frame. If the CRC calculation does not match, the frame can be discarded and the filtering process can be performed. Becomes If the received frame is normal, the frame to be transmitted is temporarily stored in a buffer memory in the device via the SW unit (40-b). At this time, it is determined whether the frame received from the CPU (40-c) is the frame described in FIGS.
If it is determined that the frame is not the frame, the frame is directly transmitted to the transmission path (400) via the SW unit (40-b) and the PHY1 (40-a) unit. If it is determined that the frame is the frame, this frame is terminated, and the above-described processing is performed.
When requesting remote loopback test setup / release,
Loop formation / release is performed in the HY1 (40-a) section. In addition, the number of ports of the photoelectric conversion device in FIG. 11 is changed from two ports to a large number of ports, and the G.I. A configuration in which O / E and E / O conversion (40-f) conforming to the 957 S-1.1 and L-1.1 standards are provided and the SW unit switches frames to each port, 3 is a schematic block configuration of a concentrator A (50) of FIG.

[0016] In the invention related to the invention described in the claims, the invention described in the above embodiment includes:
(1) An optical access communication device or router configured such that a router can perform a remote loopback test with an optical-electrical conversion device using a frame. And an optical access communication device or an optical-electrical conversion device configured to enable a remote loopback test with a router.

According to the above-described embodiment, the ITU-T recommendation of G.264, which is a standard for a synchronous optical communication network, has been adopted. 957
By adopting the optical interface of the S-1.1 and L-1.1 standards as the physical interface, the transmission speed can be increased to 100.
The transmission distance of Base (data rate 100 Mbit / s) can be extended to, for example, 15 km or 40 km, and high-speed, large-capacity data can be provided to a wide area. Also, a destination address (DA), a source address (SA), a TYPE / LENG in a MAC header defined in the IEEE802 standard.
By defining the TH length, it becomes possible to control and monitor the status of the photoelectric conversion device installed in the subscriber's house from the router. For this reason, it is no longer necessary to assign an IP address that has been assigned to each information communication device to the photoelectric conversion device, and it becomes unnecessary to manage a plurality of IP addresses. Further, it is possible to perform fault management (monitoring, maintenance, and testing) having the same reliability as that of the conventional LAN network management and the optical subscriber communication system used in the conventional service.

[0018]

According to the present invention, network management can be simplified and a high-speed, large-capacity data can be provided in a wide range in a communication network using the IEEE 802 standard. Highly reliable fault management (monitoring, maintenance, testing)
Becomes possible.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration example of an optical access communication system as an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a network configuration using a router and an optical-electrical conversion device as an embodiment of the present invention.

FIG. 3 is a diagram showing a configuration example of a frame according to the present invention.

FIG. 4 is a diagram illustrating an example of a frame type and an example of a command content according to the present invention.

FIG. 5 is a diagram illustrating a configuration example of a status notification response frame according to the present invention.

FIG. 6 is a diagram showing an example of contents in a status notification response frame of FIG. 5;

FIG. 7 is a diagram showing a sequence example at the time of a remote loopback test according to the present invention.

FIG. 8 is a diagram illustrating a sequence example of a power-off notification frame according to the present invention.

FIG. 9 is a diagram showing a sequence example of a status notification frame according to the present invention.

FIG. 10 is a diagram showing a sequence example of a notification frame in the present invention.

FIG. 11 is a diagram illustrating a configuration example of a photoelectric conversion device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Accommodating station A, 2-5 ... Subscriber's house A-D, 10 ... Router A, 20 ... Wavelength multiplexing apparatus A, 30 ... Supervisory control apparatus A, 40-44 ... Opto-electric conversion apparatus A-D, 50 ... Concentrator A, 60: Home router A, 100: Router
Interface between wavelength multiplexing devices A, 200: Interface between wavelength multiplexing devices A, 300-303 ... Optical interface between router and photoelectric conversion device, 400-403 ...
Interface between photoelectric converter and personal computer, 500
... Interface between photoelectric conversion device D and home router A
600: interface between photoelectric conversion device D and personal computer D, 700: interface between router A and concentrator A, 800-803: interface between concentrator A and photoelectric conversion device, 40-a: PHY1, 40-b ...
SW unit, 40-c CPU, 40-d buffer memory, 40-e PHY2, 40-f O / E, E
/ O conversion.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Toru Hirai 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Hitachi, Ltd.Communications Division (72) Keiichi Otani 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Hitachi, Ltd., Communications Division (72) Inventor Minoru Sekiguchi 216, Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term in the Social and Network Systems Division, Hitachi, Ltd. 5K002 BA04 DA12 EA05 FA01 5K033 AA09 CA17 CC01 DA06 DA15 DB06 DB17 DB22

Claims (6)

[Claims] 1. An optical access communication apparatus using the IEEE 802 standard, comprising: a router installed at an accommodation station; and an opto-electrical conversion apparatus installed at a subscriber's house. An optical access communication device characterized in that a physical interface with the device is an optical interface. 2. The physical interface according to the International Electrical Union's recommended G.264 standard. The optical access communication apparatus according to claim 1, wherein the optical access communication apparatus has a configuration using an optical interface of 957 S-1.1 and L-1.1 standards. 3. The router according to claim 1, wherein the router is an IEEE 8
A frame having the destination address in the MAC header defined by the H.02 standard fixed at ALL0, the source address fixed at the MAC address of the router, and the TYPE / LEMNGTH length fixed at ALL1 is transmitted to the photoelectric conversion device side, and The optical access communication device according to claim 1, wherein the optical access communication device is configured to control or monitor the electric conversion device. 4. An optical-electrical conversion device used in an optical access communication device using the IEEE 802 standard, which is installed on a subscriber side, connected to a router on an accommodation station side by an optical interface, and specified by the standard. Destination address, source address, or TYPE / LEN in MAC header
An opto-electrical converter characterized in that the router is notified of its own fault condition by transmitting a frame defining a GTH length to the router side. 5. A router for use in an optical access communication device using the IEEE 802 standard, which is installed at the accommodation station side, is connected to the optical-to-electrical conversion device at the subscriber side by an optical interface, and is defined by the standard. Destination address, source address, or TYPE / LEN in MAC header
A router characterized in that a frame defining a GTH length is transmitted to the photoelectric conversion device side to control and monitor the photoelectric conversion device. 6. A method for notifying a router from a photoelectric conversion device to a router in an optical access communication device using the IEEE 802 standard, wherein a destination address in a MAC header defined by the standard is fixed to ALL1 or the router M
AC address, source address is fixed to ALL0,
A step of defining the TYPE / LENGTH length as fixed to ALL1 and a step of transmitting the defined frame from the optical-electrical conversion device on the subscriber side to the router on the accommodation station side, and A failure notification method, wherein a status is notified to the router.