Patent ID: 6477171
Filing Date: 2002-11-05
Classification: H04J,H04L

Abstract:
A method for conducting automated transmission and reception speed negotiation within a fibre channel port of a fibre channel node in a fibre channel arbitrated loop, the method comprising:turning off a transmitter of a transceiver component of the fibre channel port; waiting for a first period of time; turning on the transmitter of the transceiver component of the fibre channel port and setting the transmitter's data transmission rate to a high data transmission rate; setting a data reception rate of a receiver of the transceiver component to a low data reception rate; iteratively waiting to detect word synchronization by the receiver of the transceiver component, and, when word synchronization is not detected within a second period of time, setting the data reception rate of the receiver of the transceiver component to a different data reception rate until word synchronization is detected; determining whether the data transmission rate is equal to the data reception rate immediately following word synchronization, and, if the data transmission rate is not equal to the data reception rate immediately following word synchronization, turning off the transmitter of the transceiver component of the fibre channel port; waiting for a third period of time; and turning on the transmitter of the transceiver component of the fibre channel port and setting the data transmission rate of the transmitter to the data reception rate of the receiver of the transceiver component.