Optical communication interface utilizing coded pulse amplitude modulation

摘要

The present invention is directed to communication system and methods. More specifically, various embodiments of the present invention provide a communication interface that is configured to transfer data at high bandwidth using PAM format(s) over optical communication networks. In certain embodiments, the communication interface is used by various devices within a spine-leaf network architecture, which allows large amount of data to be shared among servers.

主权项

1. A leaf spine server system comprising:
a spine switch configured to direct communication at a rate of about 100 Gigabit per seconds using a pulse amplitude modulation (“PAM”) format between a plurality of leaf switches over optical communication links, each of the plurality of leaf switches being coupled to a plurality of servers configured within a rack, the plurality of leaf switches including a first switch and a second switch, a first server being configured to communicate with a second server through the first switch and the second switch, the spine switch comprising a transmitter module comprising: a receiver device configured to receive four communication channels, each of the channels being capable of transferring incoming data at 25 Gbps and configured as a PAM-2 format; a clock data recovery circuit configured to receive the incoming data from the four communication channels; an encoder to format the incoming data from the four channel communications to generate an encoded incoming data, the encoded incoming data comprising a data stream for transmitting through an optical network, wherein the encoded incoming data comprises multi-dimensional-BCH codes using a polynomial extension and having overlap in multiple bits; a driver device configured to drive the encoded incoming data; and a PAM modulator configured to receiving the encoded incoming data and transferring an outgoing signal at a rate of at least 40 Gbps per second using a PAM format.