System and method for a high available and survivable communication system

• US 8,428,511 B1
• Filed: 08/10/2007
• Issued: 04/23/2013
• Est. Priority Date: 08/10/2007
• Status: Expired due to Fees

• Current Assignee: Nextel Communications (Deutsche Telekom AG)
• Original Assignee: Nextel Communications (Deutsche Telekom AG)
• Inventors: Gunasekara, Don, Wilson, Tom
• Primary Examiner(s): GONZALES, APRIL GUZMAN
• Application Number:
  US11/837,348
• Time in Patent Office: 2,083 Days
• Field of Search: 307/3, 340/310.11, 340/538, 340/538.11, 340/870.01, 340/3.1, 340/310.17, 340/531, 370/351, 370/420, 370/353, 370/401, 370/349, 375/258, 375/220, 455/414.1, 455/423, 455/426.2, 455/445, 455/3.06
• US Class Current: 455/40
• CPC Class Codes: H04B 13/02 Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy

Abstract

A network architecture for underground communication using redundant interconnected communication systems utilizes an aboveground master control station to send a status request message to a belowground gateway. The gateway may then, in turn, broadcast a status request message to a plurality of communication hubs located throughout an underground region using each of a plurality of potentially available communication systems. In the event that one of the communication hubs fails to respond over the then-current communication system, the master control station may switch the current communication system being used to a truly available system.

Claims

1. A method for providing redundant underground communications comprising the acts of:

receiving a status request message from an aboveground control unit;

broadcasting the status request message to a plurality of below ground communication hubs over a plurality of communication systems;

detecting that a current communication system is unavailable for a communication hub of the plurality of belowground communication hubs;

transmitting a switch over command to the communication hub to use an available communication system of the plurality of communication systems;

receiving, in response to the switch over command, a switch over response from the communication hub over the available communication system;

designating the available communication system as an active communication system for the communication hub in response to receiving the switch over response; and

receiving a response to the status request message from the plurality of below ground communication hubs over each of the plurality of communication systems that is available.

2. The method of claim 1, wherein detecting comprises detecting that the current communication system is unavailable when a response to the status request message is not received from the communication hub within a predetermined period of time.

3. The method of claim 1, further comprising informing the aboveground control unit that the current communication system is unavailable for the communication hub.

4. The method of claim 3, wherein sending the switch over command comprises sending the switch over command to the communication hub in response to a switch over request received from the aboveground control unit.

5. The method of claim 1, further comprising transmitting a test communication to the active communication system to verify availability.

6. The method of claim 1, wherein the plurality of communication systems includes at least one of a leaky feeder cable system, a very low frequency system, an Ethernet system, a Wi-Fi network, and a cellular communication network.

7. A system for providing redundant underground communications comprising:

a receiver configured to receive a status request message from an aboveground control unit;

a transmitter for broadcasting the status request message to a plurality of belowground communication hubs over a plurality of communication systems; and

a processor electrically connected to the receiver and the transmitter, the processor configured to;

detect that a current communication system is unavailable for a communication hub of the plurality of below ground communication hubs,

send, using the transmitter, a switch over command to the communication hub to use an available communication system of the plurality of communication systems,

receive, in response to the switch over command, a switch over response from the communication hub over the available communication system,

designate the available communication system as an active communication system for the communication hub in response to the switch over response, and

receive a response to the status request message from the plurality of below ground communication hubs over each of the plurality of communication systems that is available.

8. The system of claim 7, wherein the processor is configured to detect that the current communication system is unavailable when a response to the status request message is not received from the communication hub within a predetermined period of time.

9. The system of claim 7, wherein the processor is further configured to inform the aboveground control unit that the current communication system is unavailable for the communication hub.

10. The system of claim 9, wherein the processor is configured to send the switch over command to the communication hub in response to a switch over request received from the aboveground control unit.

11. The system of claim 7, wherein the processor is further configured to transmit a test communication to the active communication system to verify availability.

12. The system of claim 8, wherein the plurality of communication systems includes at least one of a leaky feeder cable system, a very low frequency system, an Ethernet system, a Wi-Fi network, and a cellular communication network.

13. The system of claim 8, wherein the processor is further configured to update a status database with information regarding the active communication system.

14. A computer program product, comprising:

a non-transitory processor readable medium having processor executable code embodied therein for providing redundant underground communications, the processor readable medium having;

processor executable program code to receive a status request message from an aboveground control unit;

processor executable program code to broadcast the status request message to a plurality of below ground communication hubs over a plurality of communication systems;

processor executable program code to detect that a current communication system is unavailable for a communication hub of the plurality of below ground communication hubs;

processor executable program code to transmit a switch over command to the communication hub to use an available communication system of the plurality of communication systems;

processor executable program code to receive, in response to the switch over command, a switch over response from the communication hub over the available communication system;

processor executable program code to designate the available communication system as an active communication system for the communication hub in response to receiving the switch over response, and

processor executable program code to receive a response to the status request message from each of the plurality of communication systems that is available.

15. The computer program product of claim 14, wherein the processor executable program code to detect comprises processor executable program code to detect that the current communication system is unavailable when a response to the status request message is not received from the current communication system within a predetermined period of time.

16. The computer program product of claim 14, wherein the processor readable medium further includes processor executable program code to inform the aboveground control unit that the current communication system is unavailable.

17. The computer program product of claim 16, wherein processor executable program code to send the switch over command comprises processor executable program code to send the switch over command to the available communication system in response to a switch over request from the aboveground control unit.

18. The computer program product of claim 14, wherein the processor readable medium further includes processor executable program code to transmit a test communication to the active communication system to verify availability.

19. The computer program product of claim 14, wherein the plurality of communication systems includes at least one of a leaky feeder cable system, a very low frequency system, an Ethernet system, a Wi-Fi network, and a cellular communication network.

20. The computer program product of claim 14, wherein the processor readable medium further includes processor executable program code to update a status database with information regarding the active communication system.