Fault tolerant data communication network
First Claim
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1. A network topology backplane bus architecture comprising:
- four independent data communication lines;
a plurality of processing nodes sharing said independent data communication lines for data communication;
one or more of said processing nodes associated with a first enclosure being normally connected for transmitting on first and second of said data communication lines and being normally connected for receiving on all of said data communication lines, wherein the one or more of said processing nodes associated with a first enclosure does not transmit on third and fourth of said data communication lines; and
one or more other processing nodes associated with a second enclosure being normally connected for transmitting on third and fourth of said data lines and being normally connected for receiving on all of said data lines, wherein the one or more of said other processing nodes associated with a second enclosure does not transmit on the first and second data communication lines.
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Abstract
The present invention provides a fault tolerant bus architecture and protocol for use in an Integrated Hazard Avoidance System of the type generally used in avionics applications. In addition, the present invention may also be used in applications, aviation and otherwise, wherein data is to be handled with a high degree of integrity and in a fault tolerant manner. Such applications may include for example, the banking industry or other safety critical processing functions, including but not limited to environmental control.
95 Citations
12 Claims
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1. A network topology backplane bus architecture comprising:
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four independent data communication lines; a plurality of processing nodes sharing said independent data communication lines for data communication; one or more of said processing nodes associated with a first enclosure being normally connected for transmitting on first and second of said data communication lines and being normally connected for receiving on all of said data communication lines, wherein the one or more of said processing nodes associated with a first enclosure does not transmit on third and fourth of said data communication lines; and one or more other processing nodes associated with a second enclosure being normally connected for transmitting on third and fourth of said data lines and being normally connected for receiving on all of said data lines, wherein the one or more of said other processing nodes associated with a second enclosure does not transmit on the first and second data communication lines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of sharing independent data communication lines for fault tolerant data communication among a plurality of processing nodes, the method comprising:
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permitting one or more first processing nodes associated with a first enclosure transmitting privileges on a first and a second data communication lines; permitting one or more second processing nodes associated with a second enclosure transmitting privileges on a third and a fourth data communication lines; and providing all the nodes receiving privileges on all of the data communication lines, wherein the transmitting privileges are not permitted for the one or more first processing nodes on the third and fourth data communication lines and the transmitting privileges are not permitted for the one or more second processing nodes on the first and second data communication lines.
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Specification