Patent ID: 7222784
Filing Date: 2007-05-29
Classification: H04L

Abstract:
1. A transmission base flow control device which performs data transmission/reception based on a packet form between a transmission device and a reception device having a redundant structure by utilizing a credit value to perform a flow control of a credit base on a flow basis, the transmission base flow control device comprising: a first credit counter, which is shared by an active system and a preparatory system of the reception device, for managing the credit value of the active system; a second credit counter and a third credit counter for counting the credit values for each system of the active system and the preparatory system of the reception device; a differential counter for holding a difference between the credit value counted by the second credit counter and the credit value counted by the third credit counter; and a control unit for matching, according to the difference held by the differential counter, the credit values of the first credit counter and the second credit counter or the credit values of the first credit counter and the third credit counter with a credit value corresponding to the reception device of a new active system after switching the system of the reception device.