Method of expanding bus loading capacity
First Claim
1. In a computer system having a first, second, and third bus, a method comprising:
- connecting a first first-to-second bridge to the first bus;
connecting a second first-to-second bridge to the first bus;
connecting a first set of second-to-third bridges to the first first-to-second bridge via the second bus;
connecting a second set of second-to-third bridges, that are redundant to the first set of second-to-third bridges, to the second first-to-second bridge via the third bus; and
adding a plurality of board connectors redundantly to each of the first and second sets of second-to-third bridges via a plurality of respective buses.
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Accused Products
Abstract
A method for expanding the loading capacity of a PCI bus in an information processing system having a multiple bus architecture. In one embodiment, the method comprises connecting a processor-to-PCI bridge to a plurality of PCI-to-PCI bridges to generate multiple PCI buses. A plurality of add-in board connectors are coupled to each of the generated PCI buses. In another embodiment, the method comprises connecting two or more processor-to-PCI bridges to a plurality of PCI-to-PCI bridges to generate multiple PCI buses. The resulting system expands the loading capacity of a PCI bus while adding fault-tolerance and resistance to single point failures.
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Citations
30 Claims
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1. In a computer system having a first, second, and third bus, a method comprising:
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connecting a first first-to-second bridge to the first bus;
connecting a second first-to-second bridge to the first bus;
connecting a first set of second-to-third bridges to the first first-to-second bridge via the second bus;
connecting a second set of second-to-third bridges, that are redundant to the first set of second-to-third bridges, to the second first-to-second bridge via the third bus; and
adding a plurality of board connectors redundantly to each of the first and second sets of second-to-third bridges via a plurality of respective buses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 27, 28)
connecting a first-to-fourth bidirectional bridge to the first bus;
connecting a plurality of fourth-to-fifth bi-directional bridges to the first-to-fourth bidirectional bridge via a fourth bus; and
adding a plurality of board connectors to the plurality of fourth-to-fifth bi-directional bridges via a plurality of fifth buses.
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28. The method as defined in claim 27, wherein the plurality of third buses are symmetric to the plurality of fifth buses.
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12. A program storage device storing instructions that when executed by a computer, having a first, second, and third bus, perform a method comprising:
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communicating between a first first-to-second bridge and the first bus;
communicating between a second first-to-second bridge and the first bus;
communicating between a first set of second-to-third bridges and the first first-to-second bridge via the second bus;
communicating between a second set of second-to-third bridges, that are redundant to the first set of second-to-third bridges, and the second first-to-second bridge via the third bus; and
communicating between a plurality of board connectors and each of the first and second sets of second-to-third bridges via a plurality of respective buses, wherein the plurality of board connectors are redundantly connected to the first and second sets of second-to-third bridges. - View Dependent Claims (13, 14, 15, 16, 17)
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18. In a computer system having a first, second, and third bus, a method comprising:
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connecting a first bus-to-bus bridge to the first bus to generate the second bus;
connecting a first plurality of bus-to-bus bridges to the second bus;
connecting a second bus-to-bus bridge to the first bus to generate the third bus; and
connecting a second plurality of bus-to-bus bridges to the third bus, wherein the first bus-to-bus bridge and the first plurality of bus-to-bus bridges are redundant to the second bus-to-bus bridge and the second plurality of bus-to-bus bridges. - View Dependent Claims (19, 20, 21, 22, 23, 29, 30)
communicating between a first-to-fourth bi-directional bridge and the first bus;
communicating between a plurality of fourth-to-fifth bi-directional bridges and the first-to-fourth bi-directional bridge via a fourth bus; and
communicating between a plurality of board connectors and the plurality of fourth-to-fifth bidirectional bridges via a plurality of fifth buses.
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30. The method as defined in claim 29, wherein the plurality of third buses are symmetric to the plurality of fifth buses.
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24. In a computer system having a processor bus, a first PCI bus, and a second PCI bus, a method comprising:
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connecting a first processor-PCI bridge to the processor bus;
connecting a second processor-PCI bridge to the processor bus;
connecting a first set of four PCI-PCI bridges to the first processor-PCI bridge via the first PCI bus;
connecting a second set of four PCI-PCI bridges to the second processor-PCI bridge via the second PCI bus such that said second set of four PCI-PCI bridges are redundant to the first set of four PCI-PCI bridges; and
redundantly connecting a plurality of board connectors to each of the first and second sets of PCI-PCI bridges via a plurality of respective PCI buses. - View Dependent Claims (25, 26)
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Specification