Patent ID: 6618361
Filing Date: 2003-09-09
Classification: G06F

Abstract:
A bus reset method in a network in which a plurality of apparatuses are connected by the IEEE 1394 bus, comprising the steps of:(a) sensing a state change of a port; (b) confirming whether loops exist in the bus when it is sensed in step (a) that a new apparatus is connected to an apparatus of the network; (c) transmitting the bus configuration information of a slave node from the slave node to a master node when it is confirmed that loops do not exist in the step (b); (d) re-configuring the bus of the network from the transmitted bus configuration information and existing bus configuration information of the master node; and (e) broadcasting re-configured bus configuration information to all apparatuses connected to the network; wherein the step (b) comprises the steps of: (b1) transmitting an extended unique ID (EUID) showing a configuration state of an apparatus from one node to another between the two nodes related to the connection, and designating a node which transmits an EUID as a slave node and a node which receives the EUID as a master node; (b2) comparing the transmitted EUID with the EUID of each node of the existing bus configuration information included in the master node; and (b3) stopping the bus reset if it is determined from the comparison result in step (b2) that identical EUIDs exist and otherwise proceeding to the next stop.