WO2001024449A1 - Maintenance test system between lan connection devices and lan connection device - Google Patents
Maintenance test system between lan connection devices and lan connection device Download PDFInfo
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- WO2001024449A1 WO2001024449A1 PCT/JP2000/006789 JP0006789W WO0124449A1 WO 2001024449 A1 WO2001024449 A1 WO 2001024449A1 JP 0006789 W JP0006789 W JP 0006789W WO 0124449 A1 WO0124449 A1 WO 0124449A1
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- lan
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
- H04L12/462—LAN interconnection over a bridge based backbone
- H04L12/4625—Single bridge functionality, e.g. connection of two networks over a single bridge
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
Definitions
- the present invention facilitates a path between communication terminating devices connectable to a LAN (Local Area Network), a relay device, or a path between a communication terminating device and a relay device, and an operation test with the communication terminating device or the relay device. It does not require higher-level functions than the layer 3 protocol of the OSI (Open System Interconnection) layer and enables test communication with the opposing device at the signal level or code level, facilitating installation tests and path tests. It relates to a maintenance test method between LAN connecting devices and a LAN connecting device. Background art
- any personal computer or router that is a communication device having a protocol up to layer 3 of the OSI layer can use the Echo command, and can be used between communication terminating devices that can be connected to LAN, between relay devices, and so on.
- the path between the communication terminating device and the relay device and the connection test between the communication terminating device and the relay device could be performed.
- this LAN interface device such as a bridge, switch, or repeater that does not have the protocol up to layer 3 of the OSI layer, cannot use this Echo command, so the electrical and optical 0 SI layer Although it can be confirmed up to the layer 1 link of, the operation of the equipment cannot be confirmed.
- LAN connections for example, a 100 BASE-FX line connection using an optical cable line specified in IEEE 802.3u Is adopted. ing.
- the relay part that has been a bottleneck by passing through the WAN as in the past can be eliminated by using a LAN protocol. Can guarantee the connection operation provided by the user only to one router.
- relay devices with a bridge or repeater function are sufficient for devices that do not divide the subnet according to LAN technology, but since these relay devices do not have a connection test function between devices, A relay device without such a protocol up to Layer 3 cannot be used as a demarcation point for guaranteeing communication operation.
- an object of the present invention is to provide a signal level or code level that can be recognized up to Layer 2 of SI even in a LAN connection device such as a bridge, a switch, or a repeater that does not have a protocol up to Layer 3.
- a path between communication terminating devices, between relay devices, or between a communication terminating device and a relay device, and an operation test with these communication terminating devices or relay devices are performed.
- a maintenance test method and a LAN connection device between the devices or between the communication termination device and the relay device, and a LAN connection device that enables operation tests related to communication with the communication termination device or the relay device are provided.
- the present invention provides a maintenance method in which a plurality of LAN connection devices connectable to a LAN are connected to each other by a line using an optical fiber as a physical medium.
- a maintenance test method in which a plurality of LAN connection devices connectable to a LAN are connected to each other by a line using an optical fiber as a physical medium.
- the communication means for performing normal LAN communication and the test communication means for performing a test related to communication between terminals or between logical communication ends and arbitrarily related to communication by the test communication means. It has a test means for performing a test, and performs a maintenance test on the route between the LAN connection devices. Therefore, according to the maintenance test method between LAN connection devices of the present invention, a protocol up to Layer 3 is provided. Even if there is no LAN connection device, the input and output wavelengths are separated for normal LAN communication and test communication related to communication, and the LAN connection device is used using the wavelength for test communication. The path between the units can be performed by a maintenance test.
- a maintenance system in which a plurality of LAN connection devices that can be connected to a LAN are connected to each other by a line using an optical fiber as a physical medium, between the end of physical communication or the end of logical communication.
- the input / output wavelengths of communication means for performing normal LAN communication and alarm communication means for notifying the communication state are separated, and alarm information is transferred between the LAN-connected devices by the alarm communication means.
- the normal LAN communication and the alarm information for notifying the communication state are performed.
- the input and output wavelengths can be separated for transfer and the alarm information for notifying the communication status can be transferred between LAN-connected devices using the wavelength for alarm communication.
- a maintenance system in which a plurality of LAN connection devices that can be connected to a LAN are connected to each other by a line using an optical fiber as a physical medium, between the end of physical communication or the end of logical communication.
- the power The status communication means of the connected LAN connection device notifies the other LAN connection device of a signal indicating power-off.
- the input / output is performed between the normal LAN communication and the power-off state communication. Wavelengths can be separated and a signal indicating power loss between LAN connection devices can be sent to the other LAN connection device using the wavelength for power-off communication.
- a test communication code different from the normal RAN communication code shall be used in the maintenance method between RAN connection devices in which a plurality of RAN connection devices that can be connected to the RAN are connected to each other by a line. In addition to recognizing the test communication code separately from normal LAN communication, it has means for separating normal communication and test communication from code data, and tests the path between the LAN connection devices. And
- the maintenance test method between LAN connection devices of the present invention even LAN connection devices that do not have a protocol up to Layer 3 communicate between normal communication and test communication.
- the code can be separated and the path between the LAN connection devices can be tested using the communication code for test communication.
- the communication device has means for separating normal communication and alarm communication from code data, and performs alarm transfer between the LAN connection devices.
- the normal LAN communication and the alarm information transfer for notifying the communication state are performed.
- the communication code can be divided into two types, and the communication information for notifying the communication status can be transferred between LAN-connected devices using the communication code for alarm communication.
- normal LAN communication is performed between the end of physical communication or the end of logical communication.
- the TYPE code is divided into the normal communication and the test communication, and the test communication is performed.
- a test communication using the TYPE code can guarantee a path between LAN connection devices.
- a normal LAN communication protocol is used between the end of physical communication or the end of logical communication.
- a recognition unit that recognizes a TY PE code of alarm communication different from normal LAN communication, and a separation unit between normal communication and the alarm communication. An alarm notification between the LAN connection devices is performed by the alarm communication.
- the input / output communication speed is divided into the normal communication and the test communication, and the test communication is performed.
- the connection can be checked by test communication periodically or irregularly using the communication speed for communication.
- the input / output communication speed is divided into the normal communication and the alarm communication, and the alarm communication is performed.
- Alarm communication can be performed between LAN connection devices by performing alarm communication periodically or irregularly using the communication speed for communication.
- test communication means that operates in parallel with the LAN communication independently of normal LAN communication is provided, and communication information from the line is transmitted.
- the receiving means monitors the normal LAN communication signal and the test communication signal used for the test communication, distinguishes the normal communication state from the test communication state, recognizes the test state, and outputs the test signal. Equipped with means for transmitting and receiving, under test
- the monitoring device transmits a test signal to the LAN connection device which is the device under test
- the RAN connection device transmits a response signal for identifying the completion of the test to the test signal to the device under test. It is characterized in that the normality is confirmed based on the reception state of the response signal and the communication operation between the LAN connection devices is guaranteed.
- the normal communication state and the test communication state are separated to recognize the test state, and the monitoring device under test transmits the test signal to the device under test.
- the RAN connection device Transmitted to the device, transmits a response signal for test completion identification to the test signal to the device under test, and confirms normality based on a reception state of the response signal. Therefore, even if the LAN connection device does not have a protocol up to Layer 3, the communication operation between the LAN connection devices can be guaranteed.
- Communication that can be connected to a LAN and that performs normal LAN communication between physical communication terminals or logical communication terminals in a LAN connection device connected to a partner device by a line using an optical fiber as a physical medium.
- the input / output wavelengths are divided into the normal LAN communication and the test communication related to the communication, and the test communication is performed.
- the maintenance test related to communication can be arbitrarily performed using the wavelength for communication.
- a LAN connection device that can be connected to a LAN and is connected to a partner device by a line using an optical fiber as a physical medium
- normal LAN communication is performed between physical communication ends or logical communication ends.
- the LAN connection device of the present invention even if the LAN connection device does not have the protocol up to Layer 3, the normal LAN communication and the alarm for notifying the communication state are performed.
- the input and output wavelengths are separated for information transfer, and alarm information for notifying the communication status with the partner device can be transferred using the wavelength for maintenance communication.
- a LAN connection device that can be connected to a LAN and is connected to a partner device by a line using an optical fiber as a physical medium
- normal LAN communication is performed between physical communication ends or logical communication ends.
- a signal indicating power-off is sent to the partner device.
- the input and output wavelengths are divided between normal LAN communication and power-off status communication, and A signal indicating power-off can be sent to the partner device using the communication wavelength.
- a recognizing means that can be connected to a LAN and recognizes a test communication code in a format different from a normal LAN communication code in a LAN connection device connected to a partner device via a line, and the recognizing means.
- the test communication code is recognized by the test communication code, the test communication code is separated from normal communication and test communication based on the code data, and test means for testing a path to the partner device by the test communication code is provided.
- a recognition means which can be connected to a LAN and recognizes an alarm communication code of a format different from a normal LAN communication code in a LAN connection device connected to a partner device via a line, and the recognition means
- a separating means for separating the normal communication and the alarm communication from the code data
- an alarm transfer means for transferring the state of the apparatus to the partner apparatus by the alarm communication code.
- the communication code is divided between the normal LAN communication and the alarm information transfer for notifying the communication state.
- the communication code for alarm communication it is possible to transfer alarm information for notifying the communication status to the partner device.
- a LAN connection device that can be connected to a LAN and is connected to a partner device via a line does not use values or processes that are not used for normal LAN communication addresses between physical communication ends or logical communication ends.
- Recognition means for recognizing a length or TYPE code that does not exist in the protocol as a test communication code, separation means for separating normal LAN communication from the test communication by the recognition means, periodically or irregularly Test means for performing a test with the partner device by the test communication.
- the TYPE code is divided into the normal communication and the test communication, and the TYPE code for the test communication is used.
- a test can be performed with the partner device by test communication using codes.
- Recognition means for recognizing a TYPE code as a warning communication code; separating means for separating normal communication and the warning communication by the recognition means; and warning notification means for notifying the partner device of the state of the device by the warning communication. It is characterized by having.
- the TYPE code is divided into the normal LAN communication and the alarm information transfer for notifying the communication state.
- the TYP E code for alarm communication it is possible to transfer alarm information for notifying the communication status to the partner device.
- the normal communication speed and test can be performed between physical communication ends or logical communication ends. It has a disconnecting means for separating the input / output speed from the communication speed, and a test means for performing test communication at the same time as the normal LAN communication or arbitrarily, and performs connection confirmation by test communication periodically or irregularly.
- the input / output communication speed is divided between the normal communication and the test communication.
- the connection can be confirmed by test communication periodically or irregularly using the communication speed for test communication.
- a LAN connection device that can be connected to a LAN and is connected to a partner device by a line using a twisted pair cable as a physical medium
- the normal communication speed and alarm communication between the end of physical communication or the end of logical communication
- It has separation means for separating the input and output speed from the speed, and alarm communication means for performing alarm communication simultaneously or arbitrarily with normal LAN communication, and notifies the partner device of the status of the device by alarm communication. It is characterized by
- the input / output communication speed is divided between the normal communication and the alarm communication, and the communication speed for the alarm communication is determined.
- Alarm notification can be made to the partner device by performing alarm communication periodically or irregularly by using.
- a loop test that could be performed only by a device at a remote location, for example, a router device, can be performed only up to layer 2 of 0 SI. This is possible even for LAN connection devices such as bridges, switches, and repeaters that cannot be recognized, making it easier to install equipment or to isolate the fault location when a fault occurs.
- FIG. 1 is a network configuration diagram showing a maintenance test method between LAN connection devices of the present invention and a usage state of the LAN connection device.
- FIG. 2 is a front view and a rear view showing the appearance of the LAN connection device shown in FIG.
- FIG. 3 is a block diagram showing an internal configuration of the first embodiment of the LAN connection device shown in FIG.
- FIG. 4 is a block diagram showing the internal configuration of the communication data control unit shown in FIG.
- FIG. 5 is a block diagram showing the internal configuration of the maintenance data control unit shown in FIG. 3.
- FIG. 6 is a block diagram showing the internal configuration of the MMI control unit shown in FIG.
- FIG. 7 is a block diagram showing an internal configuration of the second embodiment of the LAN connection device shown in FIG.
- FIG. 8 is a block diagram showing the internal configuration of the third embodiment of the LAN connection device shown in FIG.
- FIG. 9 is a diagram illustrating notification of fault information according to the embodiment of the present invention.
- FIG. 10 is a diagram showing a layer 2 frame format.
- FIG. 11 is a block diagram of a maintenance data control unit showing another embodiment of the LAN connection device shown in FIG.
- FIG. 12 is a coordination diagram when a plurality of LAN connection devices are connected in series in multiple stages.
- FIG. 13 is a diagram for explaining an identification number adding method used in the series multi-stage connection shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a network configuration diagram showing a maintenance test method between LAN connection devices of the present invention and a usage state of the LAN connection device.
- this network is composed of a network manager's LAN 1, a user's LAN 2, a user's LAN 3, an Internet 4, a network manager's LAN 1, and a user's LAN 2.
- An upstream optical cable line 61 and a downstream optical cable line 62 are provided.
- LAN 1 on the network operator side is connected to router 11a, which performs routing to user LAN 2, and router 11a, and establishes a LAN-to-LAN connection with user LAN 2.
- the LAN 2 on the user side is connected to the router 21 that performs routing to the LAN 1 on the network operator side and the router 21, and a LAN connection is established between the LAN 1 and the LAN 1 on the network administrator side.
- a LAN connection device 22, a server 23, and client terminals 24 and 25 are provided.
- the user LAN 3 is connected to the router 31 that performs routing to the network administrator LAN 1 and the LAN 31 that is connected to the router 31 and performs LAN connection with the network administrator LAN 1. It comprises a device 32, a server 33, and client terminals 34 and 35.
- the LAN connection devices 12a, 12b, 22 and 32 are the same device. These devices use a 10 BASE-TX or 100BASE-TX twisted pair cable defined by IEEE 802.3. Interface conversion between the electrical LAN interface used and the optical LAN interface using an optical cable line of 100 BAS E-FX specified by IEEE 802.3u Has a function.
- FIG. 2 is a front view and a rear view showing the appearance of the LAN connection devices 12a, 12b, 22 and 32 shown in FIG.
- a front panel 100 includes a power LED 103 for displaying a power-on state, and a LAN state for displaying a link state or a communication state in a LAN interface of 1 O BASEâTX or 100 BA SEâTX.
- LED 105, 100BASE-Line side LED 107 that indicates the link status or communication status of the FX LAN interface, manual transmission of test signals, operation of creating a loop status and wrapping the received signal, equipment It has push buttons 108 and 109 for controlling the status output operation or the operation for outputting information necessary for maintenance, etc., and a liquid crystal display (LCD) 110 for displaying various information such as setting information and status information. .
- LCD liquid crystal display
- the rear panel has an AC power cable 102 for obtaining commercial power, and a LAN interface connector 104 for 10 BA S or lower or 100 BA SE-TX. And 100 BASEâFX LAN interface connector 106.
- optical LAN transmission / reception unit of the present invention a plurality of wavelengths are allocated, the first wavelength is used for normal LAN communication data, the second wavelength is used for maintenance communication test data, and the third wavelength is used for maintenance communication test data.
- the wavelength or the same wavelength as the second wavelength is used for alarm data for maintenance communication, and the fourth wavelength or the same wavelength as the second wavelength is used for maintenance operation data for maintenance communication.
- maintenance can be performed by transmitting, passing, terminating, and turning back data at the second wavelength, the third wavelength, or the fourth wavelength used as maintenance communication.
- conventional communication standards using twisted pair cables composed of metallic wires of electric LAN include 10 BA S E-TX and 100 BA S E-TX, and both can use the same physical cable.
- the receiving device of 100BASE-TX receives normally but the receiving device of 100BASE-TX is determined to be abnormal.
- the receiving device of 100 BASE-TX receives normally, but the receiving device of 100 BASE-TX is determined to be abnormal. Thus, in general, they are operated so that they do not live together. Therefore, in the embodiment of the present invention, a function of judging these two kinds of speeds at the same time is provided, and when the transmission data of 10 BASE-TX is supplied to the LAN, the receiving device of 10 BASE-TX operates normally.
- the 100 BASE-TX receiving device determines that there is an error, and when the 100 BASE-TX transmission data flows, the 100 BASE-TX receiving device receives normally and 100 BASE-TX.
- the TX receiver determines that the communication is abnormal and determines the speed at which communication was performed.
- both 10BASE-TX and 100BASE-TX are determined to be abnormal, and it is possible to determine at which speed communication was performed.
- the other speed is used for maintenance communication test data, alarm data, and maintenance operation data.
- this other speed Maintenance can be performed by transmitting, passing, terminating, and turning back data depending on the degree.
- FIG. 3 is a block diagram showing the internal configuration of the first embodiment of the LAN connection devices 12a, 12b, 22 and 32 shown in FIG.
- an electric interface section 201 for a twisted pair cable made of a metallic wire and a transmitting optical interface section 202 and an optical receiving interface section 203 for an optical cable line are provided outside.
- normal data communication will be described from the electric interface unit 201.
- 100 Mbps is set for normal LAN data communication
- 10 Mbps is set for maintenance operation data communication.
- the signal input from the electric interface unit 201 has a HUB block 204 that is used internally for branching.
- the 100 Mbps signal flows to the communication data control unit 208 via the communication data bus 207, is processed as normal LAN communication data, and is sometimes converted from the signal to frame data.
- the optical module A 210 converts the electric signal into an optical signal having a wavelength of 1300 nm via the transmission communication data bus 209, and the optical concentrator 211 transmits the other optical signal.
- the light is aggregated with the wavelength from the module B 212 and output to the optical interface unit 202 on the transmission side.
- the input from the optical interface 203 has a wavelength from the optical distributor 213.
- the 1300 nm light is distributed to the optical module A 214 and the other wavelength is distributed to the optical module B 215.
- the optical module A 214 performs optical / electrical conversion, flows through the communication data bus 216 for reception to the communication data control unit 208, passes through the communication data bus 207, passes through the transceiver 205 and the HUB block 204, Is output to the electric interface 201.
- the signal input from the electric interface unit 201 is internally distributed to the transceiver 206 which determines a signal of 1 OMbps from the HUB block 204.
- Ten The Mbps signal flows through the maintenance data bus 217 to the maintenance data control unit 218, where it is processed as maintenance data, and in some cases, is converted from the signal to frame data.
- the maintenance data communication that passes through the transmission maintenance data bus 219 is converted from electricity into light with a wavelength of 1550 nm by the optical module 3 2 1 2 via the optical module 3 2 1 2.
- the light is collected with the wavelength from the other optical module A 210 and output to the transmission optical interface 202.
- the input from the optical interface section 203 receives the light of wavelength 150 nm from the optical distributor 211 to the optical module B 215, and the other wavelength to the optical module A 214.
- the optical module B 215 performs photoelectric conversion, flows to the maintenance data control unit 218 via the maintenance data bus 220 for reception, and flows to the transceiver 2 via the maintenance data bus 217.
- the signal is output to the electrical interface unit 201 via the HUB block 204.
- a loopback function such as a loop test is required in addition to relaying, and these are controlled by the maintenance data control unit 218.
- Electric interface In the case of folding back, the signal input from the electric interface section 201 passes through the HUB block 204, the transceiver 206 and the maintenance data bus 217, and the maintenance data control section 218 It is determined to be a loopback, and flows through the maintenance data bus 217 to be output to the electric interface unit 201 via the transceiver 206 and the HUB block 204.
- light is input from the optical interface section 203, and light having a wavelength of 150 nm is input from the optical distributor 213 to the optical module B 215 and the receiving maintenance data bus 215. Then, it flows to the maintenance data control unit 218 via the network 20, and is judged to be folded back. The light is converted into light of 550 nm, collected by the optical concentrator 211, and output to the transmission optical interface unit 202.
- the communication data control unit 208 communicates with the man-machine interface (MMI) control unit 221 via the MMI control unit bus 222 in order to facilitate the man-machine interface.
- MMI man-machine interface
- the troll section 218 is connected to a man-machine interface (MMI) control section 22 via an MMI control section bus 223 to facilitate the man-machine interface.
- FIG. 4 is a block diagram showing the internal configuration of the communication data control unit 208 shown in FIG.
- the communication data control unit 208 of the LAN connection device is intended to serve as a repeater, so that one of the RAN input data is transmitted from the communication data bus 207 to the other. Is received from the receiving communication data bus 216. Then, the MAC controller (1) 303 judges the validity of the signal received from the communication data bus 207, and is passed to the MAC controller (2) 305 via the repeater circuit 304, and the transmission communication data bus 209 Sent to
- the communication data bus 207 may be divided into a transmission bus and a reception bus.
- the MMC controller (1) 303 or the MAC controller (2) recognizes the state from the 305 and performs a communication control function with the MMI controller 221 via the MMI controller bus 222.
- a controller 306 is provided.
- the MAC controller (1) 303 and the MAC controller (2) 305 are used for appropriately determining the validity of a communication signal. Therefore, this configuration is not necessarily required. Therefore, the communication data control unit 208 can be realized only by the repeater circuit 304.
- FIG. 5 is a block diagram showing the internal configuration of the maintenance data control unit 218 shown in FIG.
- the maintenance data control unit 218 of the LAN connection device uses one of the RAN input data for the maintenance data bus 217 and the other RAN input data. Data is received from the maintenance data bus 220 for reception, and the signal received from the maintenance data bus 217 is judged valid by the MAC controller (1) 403 and temporarily stored in the RAM 405 via the internal bus 404 I do.
- the MAC controller (1) 403 interrupts the CPU 406 at the same time as the temporary storage, that is, the reception completion, to the RAM 405 and notifies the CPU 406 of the reception, and makes the control program recognize it.
- the ROM 407 is a storage device that stores a control program
- the clock unit 405 is a clock circuit for a time stamp such as a maintenance time in the control program.
- the signal received from the receiving maintenance data bus 220 is judged valid by the MAC controller (2) 409, and is temporarily stored in the RAM 405 via the internal bus 404.
- the MAC controller (2) 409 notifies the CPU 406 of the temporary storage in the RAM 405, that is, the completion of the reception, and notifies the CPU 406 of the reception at the same time, and causes the control program to recognize the reception by interruption.
- the maintenance data control unit 218 includes an MMI controller 410 that performs a state of each function and a communication control function with the MMI control unit 221 via the MMI control bus 223.
- the maintenance data bus 217 may be divided into a transmission data bus and a reception data bus.
- all data to be transmitted and received are maintenance commands, and from the frame data, for example, a loop test of a LAN connection device is recognized and a loopback process is performed. Is recognized as a loop test, and the relay is determined. If it is determined that the data is to be looped back, if the data is received from the MAC controller (1) 403, the data is processed as necessary and transmitted to the MAC controller (1) 403. If the data is received from the MAC controller (2) 409, the data is processed as necessary and transmitted to the MAC controller (2) 409. If it is determined that the data is to be relayed, if the data is received from the MAC controller (1) 403, the data is processed as necessary and transmitted to the MAC controller (2) 409. If the data is received from the MAC controller (2) 409, the data is processed as necessary and transmitted to the MAC controller (1) 403.
- FIG. 6 is a block diagram showing the internal configuration of the MMI control unit 221 shown in FIG.
- the MMI control unit 221 of the LAN connection device according to the embodiment of the present invention
- the control unit bus 222 connects to the communication data control unit 208
- the MMI control bus 223 connects to the maintenance data control unit 218.
- LED 103, 105, 107 provided on the front panel is LED 1? Controlled by the control unit 503, display control of lighting, blinking, and extinguishment is performed.
- the LCD 110 provided on the front panel is controlled by the LCD I / F control unit 505 to perform display control such as a device state and a setting state.
- the key IZF control unit 507 reads them and, for example, the maintenance data control unit 218 performs one of the maintenance operations. For example, it can transmit loop data.
- the combination of the electrical interface and the optical interface can be a combination of an optical interface and an optical interface, or a combination of an electrical interface and an electrical interface. This makes it possible to multiplex.
- FIG. 7 is a block diagram showing the internal configuration of the second embodiment of the LAN connection devices 12a, 12b, 22 and 32 shown in FIG.
- this LAN connection device is the same as the LAN connection device of FIG. 3 except that the LAN interface specification is an optical interface, and other configurations and functions are the same. The configuration of the difference is described below.
- the optical signal input from the LAN side flows from the optical interface unit 601 to the optical splitter 602, and the optical splitter 602 splits the optical signal having a wavelength of 1300 nm to the optical module A 603, and the other wavelength. Distributes the optical signal of 1550 nm to the optical module B 604.
- the optical module A 603 converts the optical signal to an electric signal and sends it to the communication data control unit 208 via the communication data bus 609 for transmission.
- the optical module B 604 converts the optical signal to an electric signal. And sends it to the maintenance data control unit 218 via the transmission maintenance data bus 610.
- the optical signal output to the LAN side is such that an electric signal from the communication data control unit 208 is transmitted to the optical module A 605 via the receiving communication data bus 611, and the optical module A 605 converts the electric signal into an optical signal. And transmitted to the optical concentrator 606.
- the electric signal from the maintenance data control unit 218 is transmitted to the optical module B 607 via the receiving maintenance data bus 612,
- the optical signal is converted into an optical signal and sent to the optical aggregation device 606, where the optical signal from the optical module A 603 and the optical signal from the optical module B 607 are aggregated and output. .
- FIG. 8 is a block diagram showing the internal configuration of the third embodiment of the LAN connection devices 12a, 12b, 22 and 32 shown in FIG.
- this LAN connection device has a line-side interface specification of an electrical interface with respect to the LAN connection device of FIG. 3, and other configurations and functions are the same. The configuration of the difference is described below.
- the electric signal input from the line side flows from the electric interface unit 701 to the HUB block 702, and recognizes the electric signal of 100Mb ps.
- the transceiver 703 recognizes the electric signal of 10Mb ps.
- the data is received by the transceiver 704 and transmitted to and received from the communication data control unit 208 via the communication data bus 705 by the transceiver 703.
- the transmission and reception to the maintenance data control unit 218 is performed by the transceiver 704 via the maintenance data bus 706. Do.
- the electrical interface besides performing network maintenance by changing the speed of LAN communication and maintenance communication, it can also be realized by using the same speed and changing the coding method.
- encoding specified in IEEE 802.3 according to each application is defined. For example, 100 Base-TX uses code conversion based on the NRZ (Non-Return to Zero) method. If a code other than this code is used, communication with a normal LAN connection device is not possible, and normal LAN connection is not possible. In the device, CRC error etc. occur.
- the communication data control unit 208 uses an ordinary LAN connection device, and the maintenance data control unit 218 uses an encoding method other than the IEEE 802.3 standard. Communication of this system can be realized.
- communication using the first encoding method defined by the IEEE 802.3 standard is used as normal LAN communication data, and the second encoding method other than the first encoding method is used.
- the communication can be used as test data as maintenance communication data. Further speaking.
- a third coding method other than the second coding method is used for maintenance communication data as an alert, and a fourth coding method other than the third coding method is used as maintenance communication data for operation.
- the LAN device can be maintained by sending, passing, terminating, or turning it back.
- an idle signal to be transmitted when there is no communication is defined, and normally â1â data continuously flows. Therefore, by using this method, it is possible to monitor a fault of the opposing LAN connection device by monitoring the idle signal.
- an idle signal is generated by continuous â1â
- the continuous signal of â1â is interrupted, it can be determined that the opposite LAN connection device has stopped.
- the reasons for the outage include a failure in the LAN connection device itself, a line failure, and a shutdown due to power cut-off (power failure), and the opposite LAN connection device interrupted a continuous signal of â1â. Even if they do, the reason cannot be identified.
- FIG. 9 is a diagram illustrating notification of fault information according to the embodiment of the present invention.
- (A) in Fig. 9 is a signal that is emitted when the LAN connection device fails, and by sending "1" and "0" repeatedly every second, the signal is sent to the opposite LAN connection device. Notifies that the LAN connection device is faulty.
- (a) in FIG. 9 is a signal generated when a signal is not obtained from the receiving line on the line side and it is determined that the line is faulty, and "1" and â1â are output every 500 milliseconds. 0 " By transmitting, it notifies the opposite LAN connection device that the line is faulty.
- (c) in FIG. 9 is a signal that is generated when a power-off (power failure) is recognized. For example, â1â and â0â are repeatedly transmitted for about one second, for example, seven times.
- the LAN connection device is provided with a power supply unit 804 for supplying power from the commercial power supply to the LAN connection device, and the power supply detection unit 803 supplies power from the power supply unit 804.
- the power supply is interrupted, a signal indicating that the power supply is interrupted is transmitted to the optical module B 212.
- the optical module B 212 is configured to output light to the optical interface unit 203 in response to transmission data reception from the data control unit 218 and an input signal from the power loss detection unit 804, as shown in FIG.
- the power supply unit 804 is provided with a large-capacity electrolytic capacitor, and can transmit an optical signal from the optical module B 212 for a certain period (about 1 second) even when the power supply of the commercial power supply is stopped. It is configured as follows.
- the final processing time ends at about 12 ms when the transmission speed is 100 M, and the signal is kept for a certain period during the remaining about 990 ms.
- the opposing LAN connection device has a failure signal analyzing means in the optical module B 215 for receiving and analyzing this signal, and can recognize the state of the partner.
- FIG. 10 is a diagram showing a layer 2 frame format, and its configuration and elements are defined by IEEE 802.3.
- normal LAN communication data and maintenance communication data can be separated as keys using the frame flowing to the LAN using the Layer 2 frame format. Function can be realized.
- FIG. 11 is a block diagram of a maintenance data control unit 218 showing another embodiment of the LAN connection device shown in FIG. 1, which is a maintenance data control unit 218 using a switch.
- the MAC controller (1) 1002 determines the validity of the signal received from the maintenance data bus 217 as the LAN input data, and the switch circuit 1003 determines which port the data corresponds to.
- the destination address is a device-specific value or a value predetermined for maintenance, for example, â 02: 0 0: 00: 00: 00: 00 00 ''
- the source address is a predetermined value for maintenance.
- the length Z-type value is, for example, "32" or "FFFEâ.
- HE X HE X
- other values that do not exist in the IEEE 802.3 standard, such as when the value agreed with the maintenance equipment in advance or the destination address and the source address are the same value Recognize as maintenance data. Then, when the frame data is recognized as a loop test of the present LAN connection device, for example, a loopback process is performed, or when the frame test is recognized as a loop test of a relay destination, the relay is determined. I do.
- the flow of maintenance data is determined directly by the switch circuit 1003.
- the data flowing to the bridge bus 1005 is stored in the RAM 1007 through the internal bus 1006 by the bridge ZDMA 1004, and the CPU Notify 1008 by interruption.
- the control program stored in the ROM 1009 and executed by the CPU 1008 the host data is analyzed to implement the maintenance function, and return data and new alarm data are generated.
- the maintenance function that can be operated by the switch circuit 1003 is a loop function that returns the received data without processing it and sends it back.
- the control program determines that the data is to be looped back, if it is received from the MAC controller (1) 1002, it processes the data as necessary and sends it once from the bridge ZD MA 1004 via the switch circuit 1003. (1) Perform transmission processing to 1002. If the frames are input from the buses 219 and 220, the validity of the data is judged by the MAC controller (2) 1011, and the data is sent to the RAMI 007 via the switch circuit 1003 and the bridge ZDMA 1004. The data is stored and processed by the control program, if necessary, and the data is sent from the prism / DMA 1004 to the MAC controller (2) 1011 via the switch circuit 1003 once. If relay is determined, the control program switches It outputs to the path 1003, and the switch-side MAC 1003 identifies and transmits the relay-side MAC controller.
- FIG. 12 is a cooperation diagram when a plurality of LAN connection devices are connected in series in multiple stages.
- the button on the front shown in FIG. 2 allows one LAN connection device to be the source device, and in FIG. 12, the LAN connection device described as the source device 1100 is the source device. .
- the LAN connection devices described as the relay devices 1101, 1102, and 1103 are the relay devices, and the LAN connection device described as the termination device 1104 is the termination device.
- the âidentification numberâ is incremented by one each time the signal passes through the relay device, for example, as shown in FIG. ) You can find out the number of the connected device by the formula of / 2. In this case, the total number of relay devices can be determined by transmitting data at the return each time relaying. Also, at this time, by adding a device number unique to the device to the data in addition to the âidentification numberâ, it is possible to prevent the return data from being erroneously returned and increasing the traffic. More specifically, all the received device numbers are checked, and if the same number as the device is found, relaying is performed, but maintenance is not performed in the case of this multi-stage connection based on the theory that does not loop back.
- a LAN connection device in a remote place that does not have a protocol up to layer 3 of the 0 SI layer can perform, for example, a loop test, and can be used when equipment is installed or a failure occurs. Therefore, it is possible to obtain the function and effect that can be used for determining the location of a fault.
- the maintenance test method between LAN connection devices and the LAN connection device of the present invention can be applied to LAN connection devices that do not have a protocol up to layer 3 of the OSI layer at a remote location. Loop tests can be performed, equipment installation or failure It can be used for fault location isolation at the time, and as a result, the separation between the range managed by the user and the range managed by the network operator can be confirmed without using a router device, and the demarcation point of the problem (fault) location Can be easily grasped.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL14209700A IL142097A0 (en) | 1999-09-29 | 2000-09-29 | System for performing maintenance test between lan connecting devices and the same lan connecting device |
| EP00962994A EP1133103A4 (en) | 1999-09-29 | 2000-09-29 | MAINTENANCE TEST SYSTEM BETWEEN A LAN-CONNECTED DEVICE AND A LAN CONNECTOR |
| IL142097A IL142097A (en) | 1999-09-29 | 2001-03-19 | System for performing maintenance test between lan connecting devices and the same lan connecting device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27700299 | 1999-09-29 | ||
| JP11/277002 | 1999-09-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001024449A1 true WO2001024449A1 (en) | 2001-04-05 |
Family
ID=17577403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2000/006789 Ceased WO2001024449A1 (en) | 1999-09-29 | 2000-09-29 | Maintenance test system between lan connection devices and lan connection device |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1133103A4 (ja) |
| IL (2) | IL142097A0 (ja) |
| WO (1) | WO2001024449A1 (ja) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1168817A (ja) * | 1997-08-22 | 1999-03-09 | Nec Commun Syst Ltd | åºå¹¹ãããã¯ãŒã¯çžäºæ¥ç¶ã«ãããé害éç¥æ¹åŒ |
| JP2000324153A (ja) * | 1999-05-12 | 2000-11-24 | Fujikura Ltd | ïœïœçšã³ã³ããŒã¿ |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0861534B1 (en) * | 1995-11-17 | 2007-06-20 | Telecommunications Techniques Corporation | Instrument for test and measurement of atm network virtual connections |
| JP2705683B2 (ja) * | 1996-02-05 | 1998-01-28 | æ¥æ¬é»æ°æ ªåŒäŒç€Ÿ | ãããã¯ãŒã¯ã®èŠå ±åéæ¹æ³ |
| GB2315938B (en) * | 1996-08-01 | 2001-02-28 | Northern Telecom Ltd | Optical transmission system fault analysis |
| DE19807069A1 (de) * | 1998-02-20 | 1999-08-26 | Bosch Gmbh Robert | Verfahren zur Ãbertragung von optischen Nutzsignalen und optisches Leitungsnetzwerk |
-
2000
- 2000-09-29 EP EP00962994A patent/EP1133103A4/en not_active Withdrawn
- 2000-09-29 IL IL14209700A patent/IL142097A0/xx active IP Right Grant
- 2000-09-29 WO PCT/JP2000/006789 patent/WO2001024449A1/ja not_active Ceased
-
2001
- 2001-03-19 IL IL142097A patent/IL142097A/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1168817A (ja) * | 1997-08-22 | 1999-03-09 | Nec Commun Syst Ltd | åºå¹¹ãããã¯ãŒã¯çžäºæ¥ç¶ã«ãããé害éç¥æ¹åŒ |
| JP2000324153A (ja) * | 1999-05-12 | 2000-11-24 | Fujikura Ltd | ïœïœçšã³ã³ããŒã¿ |
Non-Patent Citations (2)
| Title |
|---|
| NATSUME M. ET AL.: "Optical fiber ethernet data transmission", INTERNATIONAL IEE/IAS CONFERENCE ON INDUSTRIAL AUTOMATION AND CONTROL: EMERGING TECHNOLOGIES, 1995, pages 657 - 662, XP002934997 * |
| See also references of EP1133103A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| IL142097A (en) | 2006-07-05 |
| EP1133103A4 (en) | 2007-07-11 |
| EP1133103A1 (en) | 2001-09-12 |
| IL142097A0 (en) | 2002-03-10 |
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