Method for discovering routers in a communication path of a supervisory control and data acquisition system

• US 9,100,318 B1
• Filed: 09/25/2014
• Issued: 08/04/2015
• Est. Priority Date: 04/05/2001
• Status: Expired due to Term

• Current Assignee: DJ Osburn Management LLC
• Original Assignee: DJ Inventions, LLC
• Inventors: Osburn, Douglas C. III
• Primary Examiner(s): Barbee, Manuel L
• Application Number:
  US14/497,292
• Time in Patent Office: 313 Days
• Field of Search: 702/188, 709/238
• US Class Current: 1/1
• CPC Class Codes: H04L 43/0864 Round trip delays
• CPC Class Codes: H04L 43/0882 Utilisation of link capacity
• CPC Class Codes: H04L 43/106 using time related information in packets, e.g. by adding timestamps
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 45/26 Route discovery packet

Abstract

A method for controlling data acquisition using a supervisory control and data acquisition system, wherein the system can include an enterprise server. The enterprise server can include an online configurable communication server software, a configurable server interface, a configurable protocol interface, and a configurable connection interface. The method can discover at least one router in a communication path between a communication server and at least one remote device being monitored and controlled with the supervisory control and data acquisition system and calculate latencies incurred by each hop of at least one tracer packet deployed by the communication server, to determine bandwidth restrictions.

Claims

1. A method for dynamically and continuously (i) discovering routers in a communication path between a communication server and at least one remote device monitored and controlled with a supervisory control and data acquisition system, (ii) calculating latencies incurred by each hop of at least one tracer packet deployed by the communication server to determine bandwidth restrictions, the method comprising:

a. sending the at least one tracer packet from the communication server of the supervisory control and data acquisition system to the at least one remote device in the supervisory control and data acquisition system while the supervisory control and data acquisition system monitors and controls the at least one remote device to discovering at least one router in the communication path, wherein the at least one tracer packet comprises;

i. an origination internet protocol address of the communication server;

ii. a time to live value of the at least one tracer packet; and

iii. a destination internet protocol address of the at least one remote device;

b. decrementing the time to live value of the at least one tracer packet with the at least one router as the at least one tracer packet passes through the at least one router of the communication path between the communication server and the at least one remote device until the time to live value of the at least one tracer packet reaches zero;

c. transmitting internet control message protocol messages with a time stamp to the communication server from the at least one router which has decremented the time to live value of the at least one tracer packet to zero;

d. calculating roundtrip times between the communication server and the at least one router transmitting the internet control message protocol messages using the time stamp; and

e. calculating latencies between the communication server and the at least one remote device using the roundtrip times as the supervisory control and data acquisition system operates to determine bandwidth restrictions caused by the at least one router in the supervisory control and data acquisition system as the supervisory control and data acquisition system continuously monitors and controls and communicates bidirectional with the at least one remote device.

2. The method of claim 1, reconfiguring the bandwidth and the communication path while the supervisory control and data acquisition system operates using the identified latencies and identified bandwidth restrictions.

3. The method of claim 1, instructing a processor to throttle scheduling of communication transactions to the at least one remote device using the communication server to avoid saturating bandwidth between the communication server and the at least one remote device which would result in lost or erroneous data by from the at least one remote device modifying a preconfigured rate of communication transactions to available bandwidth for the at least one remote device using the calculated latencies.

4. The method of claim 1, comparing calculated bandwidth usage to a preset bandwidth limit and provide an alarm to one or more client devices in communication with the supervisory control and data acquisition system if the calculated bandwidth usage exceeds the preset bandwidth limit.

5. The method of claim 1, wherein the internet control message protocol messages, contains at least one of:

a. a source quench message;

b. a redirect message;

c. a destination unreachable message;

d. a router solicitation message;

e. a router advertisement message;

f. a time exceeded message;

g. a bad internet protocol header message;

h. a parameter problem message;

i. an information request; and

j. an information reply.

6. The method of claim 1, instructing a processor to perform path pinging as the at least one tracer packet is deployed in order to obtain more information on the communication path.

7. The method of claim 6, displaying the results of path pinging on an executive dashboard of the supervisory control and data acquisition system.

8. The method of claim 7, calculating a theoretical maximum bandwidth condition that represents a max load that every link of the network can handle and represents all bandwidth utilization as a percentage of that theoretical maximum for each hop.

9. The method of claim 1, further comprising a data storage, wherein the data storage comprises a historian.

10. The method of claim 9, enabling the historian in the data storage to store the results of path pinging in order to identify trends in bandwidth restrictions.

11. The method of claim 9, instructing a processor to have the historian dispose of history logs after a user determined quantity of time passes and to identify object linking and embedding for process control items that reflect network health in order to provide a quick-glance view of the health of the at least one remote device.

12. The method of claim 1, calculating latencies by identifying a latency of the first hop from the communication server to a first router as the time of the first hop, a latency of a second hop from the first router to a second router as the time of the first hop plus the second hop, a latency of additional hops between routers as the sum of the time of each hop to that router.