TRANSPORT SYSTEM, CENTRAL CONTROL COMPUTER, AND TRANSPORT METHOD

• US 20130272141A1
• Filed: 03/01/2013
• Published: 10/17/2013
• Est. Priority Date: 04/17/2012
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: MASHIMO, DAISUKE, Takahashi, Kiyotaka, Shibata, Takeshi
• Application Number:
  US13/782,733
• Publication Number:
  US 20130272141A1
• Time in Patent Office: Days
• US Class Current: 370/248
• CPC Class Codes: H04L 43/18 Protocol analysers
• CPC Class Codes: H04L 45/04 Interdomain routing, e.g. hierarchical routing
• CPC Class Codes: H04L 45/50 using label swapping, e.g. multi-protocol label switch [MPLS]

Abstract

A transport system comprises a plurality of transport devices to be and a central control computer. The transport devices are coupled to a first communication path which is established autonomous and decentralized manner by communication devices. The central control computer establishes a second communication path in a transport network including the plurality of transport devices, and sets a correspondence between the first communication path and the second communication path to one of the plurality of transport devices. One of the plurality of transport devices transmits a coupling check request for checking coupling from the communication device to a loopback point to the central control computer. The central control computer transmits, depending on a result of the check of the coupling executed by the one of the plurality of transport devices, a coupling check response to one of the plurality of transport devices which has transmitted a coupling check request.

Claims

1. A transport system, comprising:

a plurality of transport devices to be coupled to a first communication path which is established between a communication device as a start point and a communication device as an end point in an autonomous and decentralized manner by the communication devices using a control packet; and

a central control computer for establishing a second communication path in a transport network including the plurality of transport devices, between one of the plurality of transport devices as a start point and one of the plurality of transport devices as an end point, and establishing the first communication path between the communication devices by setting a correspondence between the first communication path and the second communication path to one of the plurality of transport devices constituting the second communication path, wherein;

a first communication protocol used for communicating data via the first communication path and a second communication protocol used for communicating data via the second communication path are different from each other;

the central control computer is capable of processing the first communication protocol;

the central control computer sets, in order that an interface of one of the plurality of transport devices coupled to the communication device is, in a pseudo manner, recognized as an interface of the communication device by a communication device of a coupling destination, identification information on the interface in the first communication protocol to the interface of the one of the plurality of transport devices coupled to the communication device;

one of the plurality of transport devices transmits a coupling check request for checking coupling from the communication device to a loopback point to the central control computer, in a case of receiving from the communication device the coupling check request; and

the central control computer is configured to;

identify the loopback point based on the received coupling check request, in a case of receiving the coupling check request from the one of the plurality of transport devices;

instruct, depending on the identified loopback point, the one of the plurality of transport devices constituting the second communication path to check coupling of the second communication path; and

transmit, depending on a result of the check of the coupling executed by the one of the plurality of transport devices, a coupling check response to the one of the plurality of transport devices which has transmitted the coupling check request, the coupling check response being a response to the coupling check request to be returned to the communication device which has transmitted the coupling check request.

2. The transport system according to claim 1, wherein the central control computer instructs, in a case of identifying that the loopback point of the received coupling check request is a pseudo interface which is set to one of the plurality of transport devices coupled to a communication device other than the communication device which has transmitted the coupling check request, the one of the plurality of transport devices constituting the second communication path to check the coupling of the second communication path established by the one of the plurality of transport devices to which the pseudo interface as the loopback point is set.

3. The transport system according to claim 1, wherein:

the central control computer is configured to;

instruct, in a case of identifying that the loopback point of the received coupling check request is a communication device on the first communication path reached by routing through the second communication path from the communication device which has transmitted the coupling check request, the one of the plurality of transport devices constituting the second communication path associated with the first communication path for communicating to/from the communication device as the loopback point to check the coupling of the second communication path; and

transmit, the received coupling check request to the one of the plurality of transport devices as the end point of the second communication path, in a case of confirming the coupling of the second communication path;

the one of the plurality of transport devices as the end point of the second communication path is configured to;

transmit the received coupling check request to the communication device as the loopback point, in a case of receiving the coupling check request from the central control computer; and

transmit the received coupling check response to the central control computer, in a case of receiving a coupling check response from the communication device as the loopback point;

the central computer transmits the received coupling check response to the one of the plurality of transport devices as the start point of the second communication path, in a case of receiving the coupling check response from the one of the plurality of transport devices as the end point of the second communication path; and

the one of the plurality of transport devices as the start point of the second communication path transmits the received coupling check response to the communication device which has transmitted the coupling check request, in a case of receiving the coupling check response from the central control computer.

4. The transport system according to claim 1, wherein:

the central control computer transmits, in a case of identifying that the loopback point of the received coupling check request is a communication device on the first communication path reached by routing through the second communication path from the communication device which has transmitted the coupling check request, the received coupling check request to the one of the plurality of transport devices as the start point of the second communication path;

the one of the plurality of transport devices as the start point of the second communication path transmits the received coupling check request, via the second communication path, to the one of the plurality of transport devices as the end point of the second communication path, in a case of receiving the coupling check request from the central control computer;

the one of the plurality of transport devices as the end point of the second communication path is configured to;

transmit the received coupling check request to the communication device as the loopback point, in a case of receiving the coupling check request from the one of the plurality of transport devices as the start point of the second communication path; and

transmit the received coupling check response to the central control computer, in a case of receiving a coupling check response from the communication device as the loopback point;

the central computer transmits the received coupling check response to the one of the plurality of transport devices as the start point of the second communication path, in a case of receiving the coupling check response from the one of the plurality of transport devices as the end point of the second communication path; and

the one of the plurality of transport devices as the start point of the second communication path transmits the received coupling check response to the communication device which has transmitted the coupling check request, in a case of receiving the coupling check response from the central control computer.

5. The transport system according to claim 1, wherein:

the central control computer transmits, in a case of identifying that the loopback point of the received coupling check request is a pseudo interface which is set to one of the plurality of transport devices coupled to the communication device which has transmitted the coupling check request, the coupling check response to one of the plurality of transport devices which has received the coupling check request; and

the one of the plurality of transport devices which has received the coupling check response transmits the received coupling check response to the communication device which has transmitted the coupling check request.

6. The transport system according to claim 1, wherein:

the central control computer instructs the one of the plurality of transport devices as the start point to check the coupling between the one of the plurality of transport devices as the start point of the second communication path and the one of the plurality of transport devices as the end point of the second communication path, by using a coupling check function of the second communication protocol, in a case of giving an instruction on the check of the coupling of the second communication path; and

the one of the plurality of transport devices as the start point of the second communication path checks, by using the coupling check function of the second communication protocol, the coupling up to the one of the plurality of transport devices as the end point, in a case of being instructed to check the coupling of the second communication path.

7. The transport system according to claim 1, wherein:

the central control computer instructs the one of the plurality of transport devices as the start point to check the coupling to all transport devices which are routed through from the one of the plurality of transport devices as the start point of the second communication path to the one of the plurality of transport devices as the end point of the second communication path, by using a coupling check function of the second communication protocol, in a case of giving an instruction on the check of the coupling of the second communication path; and

the one of the plurality of transport devices as the start point of the second communication path checks, by using the coupling check function of the second communication protocol, the coupling to all the transport devices which are routed through up to the one of the plurality of transport devices as the end point, in a case of being instructed to check the coupling of the second communication path.

8. A central control computer for establishing, in a transport network including a plurality of transport devices coupled to a first communication path, a second communication path between one of the plurality of transport devices as a start point and one of the plurality of transport devices as an end point, and establishing, by setting a correspondence between the first communication path and the second communication path to one of the plurality of transport devices constituting the second communication path, the first communication path between communication devices, wherein:

the first communication path is established between a communication device as a start point and a communication device as an end point, in an autonomous and decentralized manner by the communication devices using a control packet;

a first communication protocol used for communicating data via the first communication path and a second communication protocol used for communicating data via the second communication path are different from each other;

the central control computer is capable of processing the first communication protocol; and

the central control computer is configured to;

set, in order that an interface of one of the plurality of transport devices coupled to the communication device is, in a pseudo manner, recognized as an interface of the communication device by a communication device of a coupling destination, identification information on the interface in the first communication protocol to the interface of the one of the plurality of transport devices coupled to the communication device;

identify a loopback point based on a coupling check request for checking coupling from the communication device to the loopback point, in a case of receiving from one of the plurality of transport devices the coupling check request;

instruct, depending on the identified loopback point, the one of the plurality of transport devices constituting the second communication path, to check coupling of the second communication path; and

transmit, depending on a result of the check of the coupling executed by the one of the plurality of transport devices, a coupling check response to the one of the plurality of transport devices, the coupling check response being a response to the coupling check request to be returned to the communication device which has transmitted the coupling check request.

9. The central control computer according to claim 8, wherein the central control computer instructs, in a case of identifying that the loopback point of the received coupling check request is a pseudo interface which is set to one of the plurality of transport devices coupled to a communication device other than the communication device which has transmitted the coupling check request, the one of the plurality of transport devices constituting the second communication path to check the coupling of the second communication path established by the one of the plurality of transport devices to which the pseudo interface as the loopback point is set.

10. The central control computer according to claim 8, wherein the central control computer is further configured to:

instruct, in a case of identifying that the loopback point of the received coupling check request is a communication device on the first communication path reached by routing through the second communication path from the communication device which has transmitted the coupling check request, the one of the plurality of transport devices constituting the second communication path for communicating to/from the communication device as the loopback point to check the coupling of the second communication path associated with the first communication path;

transmit, in order to transmit the received coupling check request to the communication device as the loopback point, the received coupling check request to the one of the plurality of transport devices as the end point of the second communication path, in a case where the coupling of the second communication path is checked; and

transmit, in order to transmit the received coupling check response to the communication device which has transmitted the coupling check request, the received coupling check response to the one of the plurality of transport devices as the start point of the second communication path, in a case of receiving the coupling check response transmitted by the communication device as the loopback point via the one of the plurality of transport devices as the end point of the second communication path.

11. The central control computer according to claim 8, wherein the central computer is further configured to:

transmit, in a case of identifying that the loopback point of the received coupling check request is a communication device on the first communication path reached by routing through the second communication path from the communication device which has transmitted the coupling check request, in order to transmit the coupling check request to the communication device as the loopback point via the second communication path, the received coupling check request to the one of the plurality of transport devices as the start point of the second communication path; and

transmit, in order to transmit the received coupling check response to the communication device which has transmitted the coupling check request, the received coupling check response to the one of the plurality of transport devices as the start point of the second communication path in a case of receiving the coupling check response transmitted by the communication device as the loopback point via the one of the plurality of transport devices as the end point of the second communication path.

12. The central control computer according to claim 8, wherein the central control computer transmits, in a case of identifying that the loopback point of the received coupling check request is a pseudo interface which is set to one of the plurality of transport devices coupled to the communication device which has transmitted the coupling check request, in order to transmit the coupling check response to the communication device which has transmitted the coupling check request, the coupling check response to one of the plurality of transport devices which has received the coupling check request.

13. The central control computer according to claim 8, wherein the central control computer instructs, the one of the plurality of transport devices as the start point to check the coupling between the one of the plurality of transport devices as the start point of the second communication path and the one of the plurality of transport devices as the end point of the second communication, by using a coupling check function of the second communication protocol, in a case of giving an instruction on the check of the coupling of the second communication path.

14. The central control computer according to claim 8, wherein the central control computer instructs, the one of the plurality of transport devices as the start point to check the coupling to all transport devices which are routed through from the one of the plurality of transport devices as the start point of the second communication path to the one of the plurality of transport devices as the end point of the second communication path, by using a coupling check function of the second communication protocol, in a case of giving an instruction on the check of the coupling of the second communication path.

15. A transport method of transporting data for use in a transport system,

the transport system having:

a plurality of transport devices to be coupled to a first communication path which is established between a communication device as a start point and a communication device as an end point in an autonomous and decentralized manner by using a control packet; and

a central control computer for establishing a second communication path in a transport network including the plurality of transport devices, between one of the plurality of transport devices as a start point and one of the plurality of transport devices as an end point, and establishing the first communication path between the communication devices by setting a correspondence between the first communication path and the second communication path to one of the plurality of transport devices constituting the second communication path,

a first communication protocol used for communicating data via the first communication path and a second communication protocol used for communicating data via the second communication path being different from each other,

the central control computer being capable of processing the first communication protocol,

the central control computer setting, in order that an interface of one of the plurality of transport devices coupled to the communication device is, in a pseudo manner, recognized as an interface of the communication device by a communication device of a coupling destination, identification information on the interface in the first communication protocol to the interface of the one of the plurality of transport devices coupled to the communication device,

the transport method including;

transmitting, by one of the plurality of transport devices, a coupling check request for checking coupling from the communication device to a loopback point to the central control computer, in a case of receiving from the communication device the coupling check request;

identifying, by the central control computer, the loopback point based on the received coupling check request, in a case of receiving the coupling check request from the one of the plurality of transport devices;

instructing, by the central control computer, depending on the identified loopback point, the one of the plurality of transport devices constituting the second communication path to check coupling of the second communication path; and

transmitting, by the central control computer, depending on a result of the check of the coupling executed by the one of the plurality of transport devices, a coupling check response to the one of the plurality of transport devices, the coupling check response being a response to the coupling check request to be returned to the communication device which has transmitted the coupling check request.