JP2009296188A - Optical packet network system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical packet network system which enables a maintenance operator to quickly and easily perform a condition diagnosing and an appropriate treatment without taking costs when a fault is generated on a network. <P>SOLUTION: In the optical packet network system configured so as to transmit and receive optical packets between terminal units connected through a route switching device, each terminal unit is provided with a test packet transmission/reception part, one terminal unit is made to be a master and the other terminal unit is made to be a slave. By detecting a test packet transmitted from the master side, the slave side generates a return packet corresponding to the test packet and transmits it to the master side. The master side collates the test packet transmitted to the slave side and the return packet transmitted from the slave side and inspects the communication function. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical packet network system, and more particularly to maintenance and inspection of communication functions between terminal devices constituting the optical packet network system.

  FIG. 3 is a configuration diagram showing an example of an inspection system for maintaining and inspecting a communication function between terminal devices constituting a conventional optical packet network system. This inspection system is roughly composed of a measured system 10 comprising an optical packet network system and a measuring system 20 having the measured system 10 as a measurement target.

  The system under test 10 transmits a plurality of terminal devices 11a to 11n each receiving a test data signal input from the measurement system 20 and data signals received by the terminal devices 11a to 11n to the next stage. A distributor / combiner 12 to be combined and a host device 13 that receives the data signal combined by the distributor / coupler 12 and transmits the data signal to the measurement system 20 are configured. The host device 13 includes an O / E converter 13a that converts an optical signal into an electric signal and a control circuit 13b.

  The measurement system 20 includes a data generator 21 that outputs a test data signal to each of the terminal devices 11a to 11n of the system under measurement 10, a memory 22 that receives and stores transmission data output from the host device 13 of the system under measurement 10. A data collating unit 23 for collating the data transmitted and output from the data generating unit 21 to the respective terminal devices 11a to 11n of the measured system 10 and the data transmitted from the measured system 10 to the measuring system 20 and received and stored in the memory 22; And a control circuit 24 that controls each part of the measurement system 20.

  The inspection system configured as described above collates the test data signal transmitted from the measuring system 20 to the measured system 10 and the data signal returned from the measured system 10 to the measuring system 20 by the data collating unit 23, Based on the presence or absence of a bit error, an inspection diagnosis is performed on the communication function of each of the terminal devices 11a to 11n constituting the system under test 10.

  In Patent Document 1, a measurement system and a system under measurement are separately installed, a test signal is transmitted from the measurement system to the system under measurement, a signal returned from the system under test to the measurement system, and a signal from the measurement system to the system under measurement. The present invention relates to a bit error measuring device that checks a transmitted test signal and checks whether there is an error.

Japanese Patent Laid-Open No. 10-178490

However, the conventional inspection system as shown in FIG. 3 has a problem that a wiring cost or the like occurs because a measurement system for detecting a bit error in the system under measurement is provided outside the system under measurement.
In addition, since the measurement system and the system under test are provided separately, when maintenance is required for the system under test, the maintenance worker goes to the place where the system under test is installed for diagnosis and repair. There is a problem that must be done.

  The present invention solves the above-described problems, and in the event of a failure in an optical packet network system, an optical packet network that allows a maintenance operator to quickly and easily perform status diagnosis and appropriate measures. The purpose is to provide a system.

In order to achieve the above object, claim 1 of the present invention provides:
In an optical packet network system configured to send and receive optical packets between terminal devices connected via a path switch,
Each terminal device is provided with a test packet transmitter / receiver,
One terminal device as a master and the other terminal device as a slave,
The slave side generates a return packet corresponding to the test packet by detecting the test packet transmitted from the master side, and transmits it to the master side. The master side transmits the test packet transmitted to the slave side and the slave side. The communication function is checked by checking the return packet transmitted from the network.

In Claim 2, In the optical packet network system of Claim 1,
The master side generates and stores test data including a test identification signal by receiving a test command from the outside and transmits it to the slave side,
The slave side detects and analyzes the test identification signal from the received optical packet, and if the received data is a test packet, it processes return test data and transmits this data to the master side,
When the master side detects and analyzes the test identification signal from the received optical packet data and confirms that it is the return test data, the return test data is compared with the stored test data to obtain measurement data. It is characterized by checking for errors.

In Claim 3, In the optical packet network system of Claim 2,
The collated data is output when there is a request from the outside.

In Claim 4, In the optical packet network system in any one of Claims 1-3,
Data transmitted from the outside, test data and non-test data or a plurality of non-test data are transmitted from the master side to the plurality of slave sides, and a plurality of the test data and the non-test data or a plurality of the non-test data are transmitted. The data is transmitted from the slave side to the master side.

  With such a system configuration, when a failure occurs in the optical packet network system, the maintenance worker can quickly and easily diagnose the situation and take appropriate measures without using a conventional bit error measuring device. It can be carried out.

  The optical packet network system of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.

In FIG. 1, an optical packet network system includes a master-side terminal device 30, a plurality of slave-side terminal devices 40a to n, and a path switch 50 for interconnecting these terminal devices 30 and 40a to n. The optical fiber 60 is connected to the optical signal system of the system.
The path switch 50 can be a router / bridge, for example.

  The terminal device (master side) 30 includes a data transmission unit 31, a data reception unit 32, a signal converter 33, a control circuit 34, a memory 35, and a test data collation unit 36. The data transmission unit 31 includes a test data generation unit 31a, and the data reception unit 32 includes a packet receiver 32a and a test data detection unit 32b.

  The signal converter 33 includes an E / O converter that converts an electrical signal into an optical signal, and an O / E converter that converts an optical signal into an electrical signal.

  The terminal devices (slave side) 40a to n receive the signal converter 41, the loopback data insertion unit 42, the control circuit 43, the test data detection unit 44, the loopback data generation unit 45, the memory 46, and the packet data. And a packet receiver 47 for receiving.

  The signal converter 41 includes an O / E converter that converts an optical signal into an electrical signal and an E / O converter that converts an electrical signal into an optical signal.

The operation of FIG. 1 will be described.
When starting the test, the maintenance worker gives a test command for the terminal device (slave side) 40a to the control circuit 34 of the terminal device (master side) 30 from a PC or the like. The control circuit 34 that has received the test command causes the test data generation unit 31a of the data transmission unit 31 to transmit the test packet data TPD.

  The test data generating unit 31a transmits the test packet data TPD to the terminal device (slave side) 40a, and stores the transmitted test packet data TPD in the memory 35 at the same time.

  Test packet data TPD transmitted from the test data generating unit 31a to the terminal device (slave side) 40a is converted from electricity to light by the signal converter 33, and the converted data is converted into the optical fiber 60 and the path switching. The data is transmitted via the device 50 and received by the terminal device (slave side) 40a.

  The test packet data TPD received from the terminal device (master side) is converted from light to electricity by the signal converter 41 of the terminal device (slave side) 40a, and the packet data received by the packet receiver 47 is a test data detection unit. 44.

  When the received packet is test packet data TPD, the test data detection unit 44 notifies the control circuit 43. Receiving the notification, the control circuit 43 issues a command for sending the return packet data RPD to the return data generation unit 45.

  The loopback data generation unit 45 that has received the instruction to send the loopback packet data RPD generates the loopback packet data RPD from the memory 46 storing the test packet data TPD, and sends the loopback packet data RPD to the loopback data insertion unit 42. . Upon receipt of the return packet data RPD, the return data insertion unit 42 inserts the return packet data RPD into the data to be transmitted to the terminal device (master side) 30, and passes through the signal converter 41, the optical fiber 60, and the path switch 50. It transmits to the terminal device (master side) 30.

  The packet data converted from light to electricity by the signal converter 33 of the terminal device (master side) 30 and further received by the packet receiver 32 a is sent to the data receiver 32. When the received packet is the folded packet data RPD, it is detected by the test data detection unit 32b.

  The test data detection unit 32b notifies the control circuit 34 and transmits the return packet data RPD to the test data verification unit 36. The test data collating unit 36 collates the test packet data TPD stored in the memory 35 in advance with the return packet data RPD. The test data collating unit 36 notifies the control circuit 34 of the collation result. When the maintenance worker requests a verification result from the outside, the maintenance worker receives the verification result from the control circuit 34. The maintenance worker performs subsequent maintenance based on the collation result.

  In this way, by providing a test packet transmitter / receiver in the terminal device (master side) 30 and terminal device (slave side) 40a, it is possible to respond on-site at the time of system start-up or when a failure occurs. Can be diagnosed and appropriate measures can be taken.

  FIG. 2 is a diagram illustrating an example of packet data according to the present invention.

The terminal device (master side) 30 that has received a test command for the terminal device (slave side) 40a from an external PC or the like generates packet data in the order of the transmission destination address, the transmission source address, and the data from the top and stores it in the memory. At the same time, the data is transmitted to the terminal device (slave side) 40a. For example, the packet data, the destination address is the address of the terminal device 40a, the source address is the address of the terminal device 30, the data part is the test identification signal, and the test data n. The test identification signal is a signal indicating whether this data is a signal to be tested or not. Test data refers to test data.
When the test identification signal does not indicate a signal to be tested, normal data is transmitted.

  The terminal devices (slave side) 40a to 40n that have received the packet data analyze the test identification signal of the data part and confirm whether or not the received packet data is a test packet. If it is a test packet, the terminal devices (slave side) 40a-n replace the addresses of the transmission destination address and the transmission source address for the test packet, and the transmission destination address and the transmission source address from the top as the return packet data RPD. The data is transmitted to the terminal device (master side) 30 in the order of the data part.

  For example, when the transmission destination address of the packet data is the address of the terminal device 40a, the transmission source address is the address of the terminal device 30, and the data part is the test identification signal and the test data n, the return packet data RPD has the transmission destination address as the terminal. The address of the device 30 and the source address are the address of the terminal device 40a, and the data part is the test identification signal and the test data n.

  The terminal device (master side) 30 that has received the return packet data RPD analyzes the test identification signal and confirms whether or not the received packet data is the return packet data RPD. In the case of the return packet data RPD, the control circuit 34 of the terminal device (master side) 30 collates the test packet data TPD stored in the memory 35 in advance with the return packet data RPD. Then, the verification result is transmitted as a measurement result when requested by the maintenance worker.

  Even if the maintenance operator does not request, the verification result may be transmitted as the measurement result.

  Note that the test packet data TPD and the non-test packet data can be simultaneously transmitted from the maintenance worker to the optical packet network and processed in the optical packet network.

  In addition, since the terminal device (master side) 30 and the terminal devices (slave side) 40a-n are provided with test packet transmission / reception units, a large-scale measurement system for maintenance is not required. The cost when a failure occurs can be reduced.

  Since there is no external bit error measurement device, wiring between the bit error measurement device and the network, which was necessary when the bit error measurement device was installed outside, is no longer necessary, and the on-site optical packet network system is managed. Communication between the person in charge and the person in charge of managing the bit error measuring apparatus becomes unnecessary.

  Therefore, by providing a test packet transmitter / receiver in each terminal device constituting the optical packet network system, it is possible to easily isolate the problem.

  As described above, according to the present invention, when a failure occurs on the network by providing a transmission / reception unit for a test packet in each terminal device constituting the optical packet network system, a maintenance worker can save the cost. Therefore, it is possible to realize an optical packet network system that can quickly and easily diagnose the situation and take appropriate measures.

It is a block diagram which shows one Example of this invention. It is a figure which shows an example of the packet data of this invention. It is a block diagram which shows an example of the conventional bit error measuring apparatus.

Explanation of symbols

10 System under measurement 20 Measurement system 30 Terminal device (master side)
40a-n Terminal device (slave side)
50 path switcher 60 optical fiber

Claims (4)

In an optical packet network system configured to send and receive optical packets between terminal devices connected via a path switch,
Each terminal device is provided with a test packet transmitter / receiver,
One terminal device as a master and the other terminal device as a slave,
The slave side generates a return packet corresponding to the test packet by detecting the test packet transmitted from the master side, and transmits it to the master side. The master side transmits the test packet transmitted to the slave side and the slave side. An optical packet network system characterized in that a communication function is checked by checking the return packet transmitted from the network. The master side generates and stores test data including a test identification signal by receiving a test command from the outside and transmits it to the slave side,
The slave side detects and analyzes the test identification signal from the received optical packet, and if the received data is a test packet, it processes return test data and transmits this data to the master side,
When the master side detects and analyzes the test identification signal from the received optical packet data and confirms that it is the return test data, the return test data is compared with the stored test data to obtain measurement data. 2. The optical packet network system according to claim 1, wherein the optical packet network system is inspected for errors.   3. The optical packet network system according to claim 2, wherein the collated data is output when there is a request from outside.   Data transmitted from the outside, test data and non-test data or a plurality of non-test data are transmitted from the master side to the plurality of slave sides, and a plurality of the test data and the non-test data or a plurality of the non-test data are transmitted. The optical packet network system according to claim 1, wherein transmission is performed from the slave side to the master side.

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