LATENCY-OPTIMIZED PHYSICAL CODING SUBLAYER

摘要

A method for reducing latency in a networking application includes receiving data at a physical coding sublayer (PCS) from a media access control (MAC) sublayer, where the MAC sublayer utilizes a first clock domain operating at a first clock frequency. The method further includes performing one or more functions in the PCS on the data in the first clock domain. The method also includes transmitting the data on one or more physical medium attachment (PMA) lanes, where the one or more PMA lanes utilize a second clock domain operating at a second clock frequency, where the first clock frequency and the second clock frequency have a fixed ratio. The data is transmitted from the first clock domain to the second clock domain without buffering the data. The method also includes performing one or more functions in the PCS on the data in the second clock domain.

主权项

1. A method comprising:
receiving data at a physical coding sublayer (PCS) from a media access control (MAC) sublayer, wherein the MAC sublayer utilizes a first clock domain operating at a first clock frequency; performing one or more functions in the PCS on the data in the first clock domain; after performing one or more functions in the PCS, transmitting the data on one or more physical medium attachment (PMA) lanes coupled to the PCS, wherein the one or more PMA lanes utilize a second clock domain operating at a second clock frequency, wherein the first clock frequency and the second clock frequency have a fixed ratio, and wherein the data is transmitted from the first clock domain to the second clock domain without buffering the data; and performing one or more functions in the PCS on the data in the second clock domain.