JP2003018159A - Protocol conversion device and communication system - Google Patents

Abstract

(57) [Summary] (With correction) [Problem] By transmitting transmission line failure information of a UNIIF unit to other similar devices connected via a transmission line,
Allows a UNI section to be monitored by other devices. A line failure detection unit that detects the occurrence of a line failure, a failure information notification unit that transmits the detected occurrence of a line failure to an external device, and a failure information reception that receives line failure information transmitted from the external device A control unit that executes a control process specified in advance according to the line failure information detected by the line failure detection unit or the line failure information transmitted from the external device, and a type of the line failure and the control unit. A storage unit for storing a relationship with the control content to be executed. UNII
When a failure is detected in the F section, the failure information is transmitted to another protocol converter. The device that has received the failure information selects and controls the forced insertion of a bit error in the UNIIF section of its own device, the stop of the transmission signal, and the notification to the maintenance person by LED or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is the opposite of a user interface, which includes a first interface unit including one or a plurality of user network interfaces having transmission means for transmitting main signal data to and from a user device. A second interface unit provided on the side and including one or a plurality of network network interfaces having means for transmitting main signal data, and a data transfer unit for transferring the main signal data between these interface units. The present invention relates to a protocol conversion device. Furthermore, the invention relates to a communication system comprising such a protocol converter.

[0002]

2. Description of the Related Art Generally, a carrier's relay network is an internationally recommended SONET or SDH (hereinafter referred to as SONE).
It is constructed by a synchronous transmission method called T / SDH), and the transmission equipment of the communication carrier is connected to each other by the SONET / SDH interface.

One of the characteristics of SONET / SDH is that the transmission frame (STM
That is, there is plenty of area called "overhead" that transfers maintenance and operation information. This allows
A network is operated by transferring monitoring information and control information between transmission devices.

[0004] Further, a device installed in a user's home to provide a leased line service by a telecommunications carrier and providing a user network interface (UNI) is called a DSU (line terminating device). There is a device to be used. This device has the same type of interface on the user side and the same type of interface on the network side. In other words, the device (router, etc.) installed on the user side converts the LAN to the interface used actually. Other functions of DSU include the role of notifying the line status of the user side to the relay device side by using the overhead and using it as a material for line service maintenance, and the failure point evaluation function by the return function from the remote.

In recent years, SONET / SD has become available due to cost reduction, high speed, and high functionality of Ethernet (R) equipment.
There are also telecommunications carriers that employ transmission devices that have interfaces other than H as network network interfaces (NNI) to differentiate them from other telecommunications carriers.

On the other hand, the interface of the user equipment is LA
Examples include Ethernet (R) used in N (Local Area Network), and fiber channel used in tape devices and disk devices. It is expected that the interface types used by these users will continue to diversify.

Although there are some line termination devices that provide an Ethernet (R) interface, devices that have the function of notifying other similar devices or other devices of communication carriers of a UNI transmission line failure Not yet developed.

In order to transmit user data (packet) received by Ethernet (R) or Fiber Channel through the SONET / SDH interface, the received packet is wrapped in a frame format called HDLC, and SONET is used.
A method of inserting into the / SDH data area and a method of dividing into ATM cells and inserting into the SONET / SDH data area are generally known.

Such a system is equipped with a plurality of UNI interface units and a plurality of NNI interface units, and is included in a packet when user data (packet) is transferred to the SONET / SDH interface side. Which interface included in the device is to be transferred is determined according to the information stored. In addition, the function that transfers the received packet based on the information (MAC address etc.) of the data link layer is called the Bridge function.
The function to transfer based on (IP address) is called Router function.

Recently, telecommunications carriers have been using conventional SONET /
Many SONET / SDH communication systems with the above-mentioned method have been developed in order to provide services with an interface that is easy for users to use while using SDH transmission equipment, and they will be introduced as user systems and communication systems in metro areas. I am trying.

[0011]

When the above-mentioned existing system is installed in the user's house and the UNI is provided to provide the service, there are the following problems.

FIG. 1 is a diagram for explaining a problem when a transmission failure occurs in a conventional system using UNI. The device A is installed in the communication carrier station, and the devices B, C and D are installed in the user station, and the device A and the devices B to D are connected by a bus. The device A installed in the telecommunications carrier station has three STM interface units 1
3 to 3, and the device B installed in the user station has the STM interface unit 4 and the user interface 5. A user device 6 such as a router is connected to the user interface 5 via a bus. The devices C and D have the same configuration as the device B. Monitoring, maintenance, control, etc. of the device are performed within the telecommunications carrier's station.

In this example, it is assumed that a transmission cable failure occurs in the section between the user interface 5 of the device B in the user station and the router 6, and the main signal cannot be transmitted / received. In this case, the device A installed in the telecommunications carrier's station cannot detect the occurrence of the transmission cable fault occurring in the section, and the devices C and D installed on the other user's side also detect the occurrence of the transmission fault. I can't. For this reason, in order to confirm whether the user device (router device or the like) or the device B has a failure according to a notification from the user, it is necessary to determine whether the transmission cable in the section is a failure or not. There was a problem in investigating the cause.

In Et1ernet, IEEE802. The technology called link aggregation specified in 3ad has been put into practical use. This technology is, for example, two Ethernet (R)
By using the link as one Ethernet (R) link, it is possible to double the transmittable bandwidth and to switch to the other link instantly even if one of them fails. It has been implemented in various user equipment such as L2SW and Luke.

FIG. 2 is a diagram for explaining a problem when a transmission failure occurs in a conventional system using ethernet. User equipment A (router etc.) and user equipment B (router etc.) are connected via protocol converters A and B. User equipments A and B each have two Ethernet (R) interfaces (A-1, A-2).
And (B −1, B −2) are bundled and used as one interface (link aggregation), and MA is routed through the primary route section, section, and section.
Assume that C frames are being sent and received. In this case, when a transmission cable failure occurs in the section and the main signal cannot be transmitted / received, the device A can detect the line failure in the section, so that the Ethernet (R) interface in the user equipment A is from A −1 to A −. Switch to 2. However, since the section is normal, the Ethernet (R) interface at user equipment B does not switch from B −1 to B −2, so user equipment A and user B
MAC frames will no longer be sent and received between and. Therefore, there is a problem that the link aggregation, which is a function of the user equipment (Ethernet (R) equipment), cannot be used even though the UNI is Ethernet (R).

Therefore, an object of the protocol conversion device according to the present invention is to realize a communication system using a SONET / SDH transmission device, which can appropriately cope with a transmission failure. .

Further, an object of the present invention is a protocol conversion device used in a communication system using a SONET / SDH transmission device, and when a line failure occurs, it is possible to respond appropriately according to the content of the failure. It is to realize a protocol conversion device that can do it.

[0018]

A protocol conversion device according to the present invention comprises a user network interface having a transmission means for transmitting main signal data to and from a user device.
A first interface unit including one or more, and a second interface unit provided on the opposite side of the user network interface and including one or more network network interfaces having means for transmitting main signal data; and In a protocol conversion device including a data transfer unit that transfers main signal data between interface units, a line fault detection unit that detects the occurrence of a line fault and fault information that transmits the detected line fault to an external device. A notification unit, a fault information receiving unit that receives line fault information transmitted from an external device, and a line fault information detected by the line fault detecting unit or line fault information transmitted from an external device in advance. The relationship between the control unit that executes the specified control processing and the content of the control processing that corresponds to the type of line fault is stored. Characterized in that it comprises a part. In this protocol conversion device, in order to solve the problem, the line fault detection unit of the device B monitors the section, and when the user IF unit detects the fault occurrence in the section, the fault information notification unit detects the fault occurrence. Notify the device A. In the device A, by receiving the fault information notified by the fault information receiving unit and notifying the control unit,
The control unit notifies the LED and the supervisory control system of it. For this reason, since the device A can detect the occurrence of a failure in the transmission line of the section, even if there is no user's report, the failure of the user apparatus (rook device or the like), the failure of the apparatus B, or the failure of the transmission cable of the section. You can cut it.

In order to solve the problems, another protocol conversion device according to the present invention is a first interface unit including one or a plurality of user network interfaces for transmitting / receiving main signal data (packets) to / from a user device. And a packet received by the first interface,
A data transfer unit for transferring to a transfer destination port defined by the destination information, and a second interface unit including one or more network network interfaces for transmitting a packet sent from the data transfer unit to an external device. A protocol conversion device comprising: a line fault detection unit that detects a fault occurrence in a main signal transmitted by the first interface unit; and a fault information notification unit that notifies the external device of the detected line fault information. A fault information receiving unit that receives the line fault information transmitted from the external device; a control unit that executes a control process designated in advance according to the line fault information transmitted from the external device; It is characterized by including a storage unit that stores the relationship between the type and the corresponding control processing content.

A preferred embodiment of the protocol conversion device is
An Ethernet (R) interface or a fiber channel interface is used as the user network interface. In order to solve the above problem, the line fault detection unit of the device A monitors the section, and when the user IF unit detects the fault occurrence in the section, the fault information notification unit notifies the device B of the fault occurrence. Device B
Then, receive the information notified by the failure information receiving unit,
By notifying the control unit, the control unit forcibly causes a failure in the section (for example, shuts down the IF on the Ethernet (R) side of the device B). As a result, since it is possible to disconnect the transmission paths of the sections almost at the same time as a result of the failure of the transmission paths of the sections, when the user equipment A switches from A-1 to A-2 and the sections switch to the sections, At the same time, the user equipment B is also switched from B-1 to B-2, and the section is switched to the section.
The user equipment A and the user equipment B transmit / receive main signal data (hlAC frame) after a short disconnection time. At the same time, the device B not only forcibly causes a failure in the section, but also notifies the maintenance person by an LED display or the like that the failure occurs intentionally triggered by the transmission path failure in the section. It is possible to prevent confusion in maintenance isolation of the transmission section.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 is a diagram showing a configuration of an example of a communication system using a protocol conversion device according to the present invention. 3 user equipments 1 such as routers and terminals
Data transmission is performed by connecting 0a to 10c and the three communication carrier devices 11a to 11c via the protocol conversion device 20 according to the present invention. The protocol conversion device 20 has a first
Of the three user network interfaces (UNI
IF parts) 21a to 21c and three network network interface parts (NNI IF parts) 22a to 22c provided on the second side opposite to the first side, and transfer data between these interfaces. . The user devices 10a to 10c are the UNI of the protocol conversion device 20.
The communication carrier devices 11a to 11c are respectively connected to the IF units 21a to 21c, and the communication carrier devices 11a to 11c are the NNI IFs of the protocol conversion devices.
The parts 22a to 22c are respectively connected. When a transmission failure occurs between the user equipment and the UNI IF of the protocol conversion device, the occurrence of the failure is transmitted to the maintenance person of the communication carrier device side via the protocol conversion device, and an appropriate processing is performed on the communication carrier side. Can be executed. Further, when a transmission failure occurs at another position of the entire system, it is possible to intentionally generate a similar failure in response to the occurrence of the failure and notify the telecommunications carrier via the protocol conversion device, or It is also possible to display a fault occurrence via the protocol converter 20 according to the present invention.

FIG. 4 shows an embodiment for providing a point-to-point communication service by using the protocol converter according to the present invention.
Data transmission is performed between the three user devices 10a to 10c installed on one side and the three user devices 10d to 10f installed on the other side. First to first side user equipment
Of the first protocol conversion device and the second protocol conversion device 30 are connected to each other, and the second protocol conversion device 30 is connected to the user device on the second side. Transmission device 40 owned by a person
Connect. Both the first and second protocol conversion devices have a UNI IF unit on the first side connected to the user device and an NNI on the second side connected to the relay device 40.
It has an IN section. Then, the user device 10a on one side
10c and the user devices 10d to 10f on the other side perform data transmission.

FIG. 5 shows a communication system for providing a multipoint communication service by using the protocol converter according to the present invention. On one side, the first group of user devices 10a ...
10c is provided, user devices 10d to 10f of the second group are provided on the other side, and user devices 10g to 10i of the third group are provided in the middle. The first group of user equipments connects to the first protocol converter 20 and
The user equipment of the group is the second protocol converter 3
0, the user equipment of the third group is connected to the third protocol converter arranged between the first protocol converter and the second protocol converter. These 3
Each protocol conversion device has a UNI IF unit on the side connected to the user device and an NNI IF unit on the other side. The third protocol conversion device 50 includes a UNI IF unit connected to the user devices of the third group and another NNI IF unit connected to the carrier device (not shown). With this configuration, it is possible to provide communication services between multiple points. By connecting many third protocol converters 50 vertically, it is possible to provide communication services between four points and more.

FIG. 6 is a diagram showing the construction of an example of the protocol conversion device according to the present invention. The protocol conversion device is connected between a UNI IF unit 61 connected to a user device such as a router or a terminal device, an NNI IF unit 62 connected to a user device via a transmission device, etc., and these interface units. And a data transfer unit 63. still,
The UNI IF unit and the NNI IF unit can be configured by one or a plurality of interface units according to the number of user devices and business entity devices. In this example, an STM IF (synchronous transfer mode interface) is used as the NNIIF unit. The packet received by the UNI IF unit 61 is transferred to the NNI IF unit 62 via the data transfer unit 63 that transfers the packet to an appropriate transfer destination port. Each transfer destination port is internally connected to either the user interface unit or the path creation / termination unit, and each packet is transferred based on the data link layer information or network layer information of the received packet. The NNI IF unit 62 has a path creating / terminating unit 64, an XC unit 65, and a demultiplexing unit 66 in order to transmit a plurality of packets sent from the data transfer unit 62 to another external device by an STM frame.

Further, the protocol conversion device according to the present invention is connected to the NNI IF section 61, and is connected to the line failure detection section 67 for detecting a line failure from the signal received by the NNI IF section, and this line failure detection section. , A failure information notifying unit 68 for notifying the external device of the occurrence of the detected line failure
And a failure information receiving section 69 connected to the path creation termination section 64 for receiving the failure information transmitted from the external device, and an appropriate control operation is performed according to the detected failure information or the transmitted failure information. It comprises a control unit 70 and a storage unit 71 connected to the control unit 70. The storage unit 71 stores in advance the relationship between the detected failure information or the failure information transmitted from the external device and the processing content executed by the control unit 70. Further, the operation content input unit 72 is connected to the storage unit 71, and the control content for the line fault input from the external device is stored in the storage unit 71 via the operation content input unit 72.

When the line fault detecting section 67 detects a line fault, the contents of the line fault are the fault notifying byte section 68a of the fault information notifying section 68 and the fault notifying PKT preparing section 68.
The failure notification bytes that have been transmitted and are respectively sent to b are supplied to the path creation unit 64, and the failure notification PKT is supplied to the data transfer unit 63. Further, the fault information detected by the line fault detection unit 67 is also supplied to the control unit 70 and stored in the storage unit 71.
Appropriate processing can also be executed based on the relationship between the failure information stored in (1) and the corresponding processing. Further, the failure information receiving unit 69 has a failure notification byte receiving unit 69a and a failure notification PKT receiving unit 69b, and the failure notification byte transmitted from the external device is transmitted from the path creating unit 64 via the failure notification byte receiving unit 69a. The fault notification PKT supplied to the control unit 70 and transmitted from the external device is the fault notification PKT.
It is supplied to the control unit 70 via the KT receiving unit 69b. Then, the control unit 70 can also execute appropriate appropriate processing in the protocol conversion device based on the line fault information transmitted from the external device.

Next, Table 1 shows an example of the relationship between the main signal fault detected by the line fault detector and the fault information message (bit string) indicating the fault information.

[0028]

[Table 1]

Further, Table 2 shows an example of the relationship between the failure information message (bit string) received by the failure information receiving section and the control operation by the control section corresponding thereto. The relationship between the main signal failure in Table 2 and the control operation by the control unit corresponding to the main signal fault can be stored in the storage unit 71 in advance.

[0030]

[Table 2]

FIG. 7 diagrammatically shows a first embodiment of fault monitoring in the UNI section using the fault information notification mechanism according to the present invention. The protocol conversion device (device A) according to the present invention is installed in the telecommunications carrier station, the protocol conversion devices (device B, device C and device D) according to the present invention are installed in three user stations, and the network is provided in the telecommunications carrier station. Monitoring of the
Perform maintenance and control of each device. The administrator of the telecommunications carrier should insert "disconnection of main signal in transmission path section" and "POH failure notification byte of STM frame" as "type of failure content detected by device B" and "notification method". "Notify device A by" is set by an operation content input unit (indicated by reference numeral 72 in FIG. 6) provided in device B in advance, and is stored in the storage unit. In addition, the administrator, as the "procedure when the notification of the main signal disconnection at the opposite device is received" by the device A, indicates "operation of the device A in advance" by "LED lighting and display on the screen of the monitoring control system". It is set by the content input unit 72 and stored in the storage unit 71.

Here, when a transmission line fault occurs in a section and the main signal cannot be transmitted / received, the device B installed in the user station has a message "the fault content detected by the device B By referring to the parameters of "type" and "notification procedure", find the conditions of "disconnection of main signal in transmission path section" and "notification to device A by inserting failure notification byte into POH of STM frame". . That is, the line failure detection unit of the device B detects the occurrence of a failure in the transmission path section and notifies the failure information notification unit of the detected content. The failure information notifying unit notifies the device A by accessing the storage unit, referring to the corresponding processing condition, and inserting the failure notification byte into the POH of the STM frame of the section based on the specified processing content. To do. In the device A, the failure information receiving unit receives the notified information and accesses the storage unit. Then, referring to the parameter of "procedure when the notification of the main signal disconnection in the opposite device" held in the storage unit, the operation content "LED lighting and display on the screen of the monitoring control system" is found. As a result, the control unit is notified of the reception information. The control unit is LE
By lighting D and displaying it on the screen of the supervisory control system, the supervisory control of the section can be performed only by targeting the supervisory control system of the telecommunications carrier.

FIG. 8 shows an example of fault monitoring for notifying a line fault occurring in the UNI section to another protocol converter installed in the notice system. The administrator specifies "disconnection of main signal in transmission path section" and "notify device A, device C, device D as an IP packet of failure content" as the type of failure content detected by device B and the notification procedure. By setting the operation content input unit of the device B in advance and holding it in the storage unit, the failure notification PKT is issued to the device A, the device C, and the device D by the detection of the failure occurrence in the line failure detection unit. , UNI of device B can also be used by maintenance personnel in other user stations.
It is possible to notify the occurrence of a fault in a section. As a result,
The other protocol conversion device that has received the notification of the line failure can execute appropriate response processing according to the content of the failure.

FIG. 9 shows an embodiment of a processing information notifying mechanism in a data transmission system between user equipments utilizing ring aggregation. One user equipment A (router, etc.) has two Ethernet (R) interfaces (A-
1, A-2) are bundled to form one interface,
On the other hand, the user equipment B (router or the like) bundles two Ethernet (R) interfaces (B-1, B-2) to form one interface (link aggregation described above). The protocol converters A to D of the present invention are arranged between these interfaces, and in the primary IF on the primary side, the protocol converter A connected to the user equipment A and the protocol converter B connected to the user equipment B.
Data transmission is performed by using the STM frame. Further, in the secondary IF, data transmission is also performed by the STM frame between the protocol conversion device C connected to the user device A and the protocol conversion device D connected to the user device B. Between the user equipments A and B, a MAC frame is transmitted and received via a section which is a primary path, a section, and a section. The administrator who performs maintenance of the notification system uses “disconnection of main signal in section” and “failure notification byte in POH of STM frame” as “kind of failure content detected by protocol conversion device A” and “notification method”. "Notification to device B by inserting" is set in advance in the operation content manual part of the protocol conversion device A and stored in the storage part. In addition, the administrator said, "Device B
Procedure when the notification of the main signal disconnection at the opposite device is received "
As "Should force Ethernet (R) IF of own device
"Notify that an intentional failure has occurred by triggering a transmission path failure by lighting the LED" is set in advance in the operation content input unit of the device B and is stored in the storage unit.

When a main signal (MAC frame) cannot be transmitted / received due to a transmission cable failure in a section, the protocol conversion device A can detect a line failure in the section, so that the Ethernet (R) interface is A-
Switching from 1 to A-2, the fault information notification unit of the protocol conversion device A holds “type of fault content detected by the protocol conversion device A” and “notification procedure” held in the storage unit.
To find the conditions of "disconnection of main signal of section" and "notification to device B by inserting failure notification byte in POH of STM frame" by referring to the parameters of
The fault notification information is inserted into the POH of the STMIF of the section to notify the protocol conversion device B on the other side. In the protocol conversion device B, the failure information receiving unit receives the notified information and refers to the parameter “procedure when the notification of the main signal disconnection in the opposite device is received” stored in the storage unit The Ethernet (R) IF of the device is forcibly shut down, and the LED is turned on to notify that there is a deliberate failure occurrence triggered by a transmission path failure. The control unit forcibly causes a failure in the section (shuts down the IF on the Ethernet (R) side of the device B), and the Ethernet (R) is switched from the primary IF to the secondary IF. As a result, it is possible to disconnect the transmission paths of the sections almost at the same time due to the failure of the transmission paths of the sections, so that the MAC frames are transmitted and received between the user apparatus A and the user apparatus B after a short disconnection time. Be done. At the same time, in the protocol conversion device B, not only the failure in the section is forcibly caused but also the intentional failure occurrence triggered by the transmission path failure in the section is indicated by the LED
By notifying the maintenance person by the display, it is possible to prevent confusion in the maintenance isolation of the transmission section.

When a similar device is inserted in the path between the device A and the device B and the path is terminated, the same function can be realized by issuing the fault information notification PKT. .

FIG. 10 shows a modification of the embodiment shown in FIG. 9 using ring aggregation, and an example of providing a service for relaying a line between user devices A and B by using a transmission device in a relay network. Show. UNI to one user device A
The user equipment A is connected to the other user equipment B, and the user equipment B is connected to the other user equipment B via the UNI. The primary IF has the same configuration as the primary IF in FIG. 9, and the secondary IF is a transmission system using a wavelength division multiplexer. The telecommunications carrier has set the interface on one side of the user equipment A and the user equipment B (layer 2 switch, etc.) to UN.
As the IIF, the Ethernet (R) interface line service is provided between the user equipment A and the user equipment B. The user equipment A and the user equipment B each provide a line service by using the section of the device of the present invention as a relay line, and the transmission equipment of the relay section will be newly added from the protocol conversion devices A and B according to the present invention in the future. When switching to WDM transmission equipment and removing this equipment,
It is necessary to switch the trunk line using the wavelength multiplexer without affecting the current line being used. In this case, by using the fault information notification mechanism described in the embodiment shown in FIG. 9 and operating the link aggregation, the switching of the relay transmission equipment can be performed without interrupting the line service being provided to the user. it can.

[0038]

As described above, according to the present invention,
It is connected to a user device (router, terminal, etc.), is equipped with a plurality of UNI interface units having means for transmitting main signal data, and is connected to other similar devices that face each other or other relay transmission devices to transmit main signal data. In a device including a plurality of NNI interface units having transmission means and having a function of transferring main signal data between a certain UNI interface unit and a certain NNI interface unit, a UNI for providing a service by a communication carrier is provided. In the communication system having the function to perform, by notifying the device of the line failure information of the UNI interface through the NNI interface, it is possible to specify the failure of the UNI section from the remote device and use the link aggregation function.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a problem caused by a transmission path failure in a conventional communication system.

FIG. 2 is a diagram for explaining a problem due to a transmission path failure in a conventional communication system using ring aggregation.

FIG. 3 is a diagram showing a configuration of an example of a communication system including a protocol conversion device according to the present invention.

FIG. 4 is a diagram showing the configuration of an example of another communication system including the protocol conversion device according to the present invention.

FIG. 5 is a diagram showing the configuration of an example of another communication system including the protocol conversion device according to the present invention.

FIG. 6 is a diagram showing a configuration of an example of a protocol conversion device according to the present invention.

FIG. 7 is a schematic diagram showing a UN using the protocol converter according to the present invention.
It is a diagram showing an example of a first form for performing fault monitoring of the I section.

FIG. 8 is a schematic diagram showing a UN using the protocol converter according to the present invention.
It is a diagram which shows another Example of the 1st form which performs the failure monitoring of the I section.

FIG. 9 is a schematic diagram illustrating a UN using the protocol converter according to the present invention.
It is a diagram which shows the Example of the 2nd form which performs the fault monitoring of the I area.

FIG. 10 shows U using the protocol converter according to the present invention.
It is a diagram which shows another Example of the 2nd form which performs the failure monitoring of NI section.

[Explanation of symbols]

10a to 10i user equipment 11a-11c Carrier device 20, 40, 50 protocol converter 30 relay device 61 UNI IF section 62 NNI IF section 63 Data transfer unit 64 path termination creation unit 65 XC Department 66 demultiplexer 67 Line failure detector 68 Fault Information Communication Department 69 Failure information receiver 70 Control unit 71 storage 72 Operation content input section

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5K028 AA14 CC05 KK01 KK03 KK32                       MM05 MM14 PP04 PP17 QQ01                       QQ02 SS24                 5K030 HA08 HB11 HC14 HD01 JL10                       KA02 KA13 LA17 LB13 MA04                       MB01 MD02                 5K035 AA03 CC06 CC08 DD01 JJ01                       JJ03 LL18 MM04 MM06 MM08

Claims (16)

[Claims] 1. A user network interface having a transmission means for transmitting main signal data to and from a user device.
A first interface unit including one or more, and a second interface unit provided on the opposite side of the user network interface and including one or more network network interfaces having means for transmitting main signal data; and In a protocol conversion device having a data transfer unit that transfers main signal data between interface units, a line fault detection unit that detects the occurrence of a line fault and fault information that transmits the detected line fault to an external device. A notification unit, a fault information receiving unit that receives the line fault information transmitted from an external device, and a pre-specified according to the line fault information detected by the line fault detection unit or the line fault information transmitted from the external device. The control unit that executes the specified control process, the type of line failure, and the control content that is executed by the control unit. Protocol conversion apparatus characterized by comprising a storage unit for storing the relationship. 2. A first interface unit including one or a plurality of user network interfaces for transmitting / receiving main signal data in the form of packets to / from a user apparatus; and a packet received by the first interface, A data transfer unit for transferring to a transfer destination port defined by the destination information, and a second interface unit including one or more network network interfaces for transmitting a packet sent from the data transfer unit to an external device. A protocol conversion device comprising: a line fault detection unit that detects a fault occurrence in a main signal transmitted by the first interface unit; and a fault information notification unit that notifies the external device of the detected line fault information. A fault information receiving unit for receiving the line fault information transmitted from an external device; and the line fault detecting unit. The relationship between the control unit that executes the control processing specified in advance according to the line fault detected by the line fault information or the line fault information transmitted from the external device, the type of the line fault, and the control contents executed by the control. A protocol conversion device comprising: a storage unit that stores the data. 3. The protocol conversion device according to claim 2, wherein an Ethernet (R) interface or a fiber channel interface is used as the user network interface. 4. The protocol conversion device according to claim 1, 2 or 3, wherein the control unit receives line fault information when the line fault detection unit detects a line fault or is notified from an external device. At this time, the relationship between the type of line fault stored in the storage unit and the control content corresponding to this is referred to, and the line fault is detected or the fault information notified from an external device is defined. A protocol conversion device characterized by executing control processing according to the above. 5. The protocol conversion device according to claim 2, wherein the packet sent from the data transfer unit is transmitted to an external device by an STM frame, the network network interface is a path creation terminal unit, A protocol conversion device comprising an STM interface including an XC unit and a demultiplexing unit. 6. The protocol conversion device according to claim 1, wherein the fault information detected by the line processing detection unit is inserted into the path overhead of the STM interface. The failure information notifying unit includes a failure notification byte unit for inserting a failure information message into a designated path overhead in order to communicate failure information between the failure information receiving unit and the failure information receiving unit. A protocol conversion device comprising a failure notification byte section for recognizing a failure content by extracting a failure message from the notification byte. 7. The protocol conversion device according to claim 1, wherein the fault information detected by the line fault detection unit is transmitted as a packet to an external device, wherein the fault information notification unit is A fault notification PKT creating unit that forms a fault information packet having a specified address from a fault information message created based on the fault content detected by the line fault detecting unit, wherein the fault information receiving unit is an external device. A protocol conversion device including a PKT receiving unit that receives a failure information packet transmitted from the device. 8. The address of the fault information packet is set to IP
Address, MAPOS address, MAC address, and layer 2 and layer 3 addresses, and the fault information packet is an IP datagram, MAPO
Characteristic data is layer 2 and layer 3 data including S frame and MAC frame, and the failure information packet formed by the failure notification PKT creating section is transmitted to a specified network network interface via a packet transfer section. The protocol conversion device according to claim 7. 9. A line fault detected by the line fault detection unit is detection of X bit errors per unit time, detection of a main signal of a received optical signal, detection of a communication alarm, detection of synchronization loss, and link failure. Detecting establishment, including keep-alive timeout, any one of claims 1 to 8.
The protocol conversion device according to item. 10. The protocol conversion device according to claim 9, wherein the control processing content by the control unit for the line fault detected by the line fault detection unit is "detection of X bit errors per unit time". "Lighting by light emitting device", "lighting by light emitting device" for "detection of disconnection of received light main signal", "lighting by light emitting device and notification to monitoring control device" for "detection of communication alarm", For "out-of-sync detection", "lighting by light-emitting device and notification to supervisory control device", for "detection of link non-establishment""notification to supervisory control device", for "stop keep alive" A protocol conversion device characterized by including "notification to monitor control device". 11. An operation content input unit is connected to the storage unit,
The relation between the type of line failure and the control operation processed by the control unit is input to the storage unit via the operation content notifying unit, according to any one of claims 1 to 10. Protocol converter. 12. A first protocol conversion device, a second protocol conversion device, and a relay device of a communication carrier connected between these protocol conversion devices, the first protocol conversion device being a first protocol conversion device. In a communication system in which a user device of a group is connected and the second protocol conversion device is connected to a user device of a second group, the first and second protocol conversion devices are any one of claims 1 to 11. A communication system using the protocol converter according to item 1. 13. A first protocol conversion device to which a user device of the first group is connected, and a second protocol conversion device connected to the first protocol conversion device and a user device of the second group. A communication system comprising a protocol conversion device and a third protocol conversion device connected to a second protocol conversion device and to which a user device of a third group is connected, wherein the first, second and third A communication system characterized in that the protocol conversion device according to claim 1 is the protocol conversion device according to any one of claims 1 to 11. 14. A communication system in which a first user device and a second user device are interconnected by first and second links, and a route is duplicated by using a ring aggregation. A first protocol converter connected to the first user equipment via a first Ethernet (R) interface (Ethernet (R) IF), and a second Ethernet (R) to the second user equipment. ) A second protocol converter connected via an interface and a STM connected between these protocol converters.
A second user equipment, wherein the second link is connected to the first user equipment via a third Ethernet interface, and a second user equipment; A first protocol conversion device connected to the device via a fourth Ethernet (R) interface; and a transmission device connected between the protocol conversion devices and performing data transmission in an STM frame. 4. A protocol conversion device according to claim 4, wherein
A communication system comprising the protocol conversion device according to any one of items 1 to 1. 15. The communication system according to claim 14, wherein when a line failure occurs between the first user device and the first protocol conversion device of the first link, the second protocol is used. Between the first user equipment and the second user equipment by intentionally causing a line failure between the second user equipment of the first link and the second protocol conversion equipment by the converter. The communication system characterized by switching the route of the above from the first link to the second link. 16. A communication system in which a first user device and a second user device are interconnected by first and second links, and a route is duplicated by using a ring aggregation, One link connects a first protocol conversion device connected to a first user equipment via a first Ethernet (R) (R) interface and a first Ethernet (R) interface to a second user equipment. A second protocol conversion device connected through the protocol conversion device and a transmission device connected between the protocol conversion devices and performing data transmission in an STM frame, wherein the second link is configured by a trunk line including a wavelength division multiplexer. The first and second protocol converters are the protocol converters according to any one of claims 2 to 11, and the first link of the first When a line failure occurs between the user device and the first protocol converter, the second protocol converter causes the connection between the second user device and the second protocol converter of the first link. A communication system characterized by intentionally causing a line failure intentionally to switch a path between a first user device and a second user device from a first link to a second link.