Hewlett Packard Enterprise Development LP

James Donald Regan

Daniel Alan Berkram

Gregg Bernard Lesartre

John William Bockhaus

Christopher Michael Brueggen

Peter David Maroni

Elene Chobanyan

John M Wastlick

David Ritter Thomas

Mauricio Madiedo

According to an example, a transmitter transmits a plurality of optical signals of multiple wavelengths via an optical link to a receiver. An optical link tuner coupled to the optical link groups the plurality of optical signals into a first group of optical signals and a second group of optical signals, where the first group of optical signals has a first wavelength range and the second group of optical signals has a second wavelength range. The optical link tuner adjusts link tuning parameters associated with the first group of optical signals during a first phase, such that the second group of optical signals is propagated to the receiver without modifications to link tuning parameters associated with the second group, where during the first phase the receiver is to detect unplugging of the optical link based on the second group of optical signals.

Optical interconnects

Systems and methods are provided for implementing forward error correction (FEC) on data transferred on a data link on the physical layer. Binary encoding can be done in accordance with a physical unit (phit) FEC format. The phit FEC format allows for correction of two bit errors and comprises a codeword having a variable bit size. Pre-coding the phit enables burst errors associated with the link to converted into bit errors. The data can be transmitted in the phit FEC format to a receiving PHY. The correctable two bit errors at one or more locations within the phit FEC format can then be corrected by decoding at the receiving PHY in accordance with the phit FEC. The FEC techniques can minimize latency in the PHY.

Physical layer low-latency forward error correction

Systems and methods for performing data transfer between first and second electrical devices are provided. One method may include electrically coupling the first electrical device to a first electrical-optical (E-O) device via a first plurality of electrical lanes, electrically coupling the second electrical device to a second E-O device via a second plurality of electrical lanes, optically coupling the first and second E-O devices via a plurality of optical lanes, and transferring data therebetween via a first optical lane. The method may include monitoring one or more parameters associated with an optical transmitter of the first optical lane, and comparing each parameter to a respective threshold. Responsive to the comparison, the method includes commencing transfer of data between the first and second E-O devices via a second optical lane, and terminating transfer of the data between the first and second E-O devices via the first optical lane.

Data transfer between electrical-optical devices

A technique includes, in response to feedback received from ongoing link training with an endpoint device over a serial communication link, a processor identifying a first training set sequence to be communicated as part of the ongoing link training. The technique includes the processor selecting a first state machine of a plurality of state machines; and the processor programming the selected first state machine to communicate the first training set sequence to the serial communication link. The programming of the first state machine includes programming the first state machine with a data pattern that is associated with the first training set sequence and programming the first state machine with a condition to regulate a number of times that the state machine communicates the data pattern to the serial communication link.

Programmable link training sequences

A processing device includes an internal transmitter to receive packets and to forward those packets across a link to an external receiver external to the processing device. The internal transmitter is to receive a portion of a packet and to begin transmitting the portion across the link to the external receiver before the entire overall packet, of which the portion is a part, is received and validated. For a packet determined to have an error, the internal transmitter does not resend the overall packet across the link even if a message is received from the external receiver to resend the overall packet.

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Ft. Collins, CO, United States of America

James Donald Regan