초록 ▼

A method and system for automatic negotiation of maximal shared data transmission and reception rates by fibre channel nodes in a fibre channel arbitrated loop. An auto-speed-negotiation function is included in the fibre channel arbitrated loop initialization procedure. A fibre channel node undergoi

A method and system for automatic negotiation of maximal shared data transmission and reception rates by fibre channel nodes in a fibre channel arbitrated loop. An auto-speed-negotiation function is included in the fibre channel arbitrated loop initialization procedure. A fibre channel node undergoing initialization turns off its transmitter in order to elicit a loss of synchronization condition in the next fibre channel node of the arbitrated loop. Upon detection of loss of synchronization, each subsequent fibre channel arbitrated loop node invokes the auto-speed-negotiation function. The fibre channel node then turns its transmitter back on at the highest possible data transmission rate, sets the data reception rate of the fibre channel node's receiver to the lowest possible data reception rate, and then waits to detect word synchronization by the receiver. If word synchronization is not detected within a reasonable period of time, the fibre channel node changes the data reception rate of the fibre channel node's receiver and again waits to detect word synchronization. Once word synchronization is detected, the fibre channel node again invokes the auto-speed-negotiation function if its current data transmission rate is not equal to its current data reception rate after setting its current data transmission rate equal to its current data reception rate.

대표청구항 ▼

1. 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 o

1. 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.