US Patent No. 10,117,360

OUT-OF-BAND DATA CENTER MANAGEMENT VIA POWER BUS


Patent No. 10,117,360
Issue Date October 30, 2018
Title Out-of-band Data Center Management Via Power Bus
Inventorship Colton Malone Crawford, Austin, TX (US)
Assignee Vapor IO Inc., Austin, TX (US)

Claim of US Patent No. 10,117,360

1. A method, comprising:receiving, with a given rack computing unit, direct current (DC) power via a DC bus connected to a plurality of rack computing units of a rack, wherein the DC bus is configured to deliver DC power to the plurality of rack computing units;
determining that a duration of time designated for the given rack computing unit to access the DC power bus for transmission is occurring;
in response to the determination, applying a time-varying electrical stimulus to the DC power bus, wherein the time-varying electrical stimulus encodes an address on the DC power bus of a rack controller and a sensor measurement indicative of operation of the given rack computing unit;
concurrent with applying the time-varying electrical stimulus, filtering voltage fluctuations of the DC power bus resulting from the time-varying electrical stimulus to produce electrical power used by the given rack computing unit, wherein the filtering is implemented with a low-pass filter that outputs the electrical power used by the given rack computing unit;
determining that another rack computing unit on the DC power bus is transmitting concurrent with applying the time-varying electrical stimulus or another time-varying electrical stimulus and, in response, selecting a different duration of time based on a random value;
encoding with pulse-width modulation the address on the DC power bus of the rack controller and the sensor measurement indicative of operation of the given rack computing unit in the time-varying electrical stimulus applied to the DC bus; and
controlling the plurality of rack computing units of the rack with the rack controller via multi-point connectivity on the DC bus by encoding RS-232 commands with pulse-width modulation of time-varying electrical stimulus applied to the DC bus, wherein the DC bus is distinct from an in-band network connected to the plurality of rack computing units.