Patent ID: 6813282
Filing Date: 2004-11-02
Classification: H04L

Abstract:
An isochronous packet transfer method for transferring an isochronous packet for which the transfer band has been secured in cycle units, between different buses, said method comprising:respectively generating as input side cycle identification information and output side cycle identification information, cycle identification information which changes each time a cycle start packet showing a start of said cycle is respectively generated on an input side bus and an output side bus; acquiring said input side cycle identification information and said output side cycle identification information at a previously determined identical timing, and respectively generating input side reference cycle identification information and output side reference cycle identification information; respectively computing a first value being an elapsed cycle number from a cycle showing said input side reference cycle identification information to a point in time where said isochronous packet appears on said input side bus, and a second value being an elapsed cycle number on said output side bus from a cycle showing said output side reference cycle identification information; generating delay information based on said first value and said second value; and transmitting said isochronous packet after a delay, to said output side bus until a cycle number indicating said delay information elapses on said output side bus.