Patent ID: 7574550

Claim:
A bridge apparatus that receives an isochronous stream from a talker station to relay to a listener station, the bridge apparatus comprising: a path provider which configures a relay path to relay the isochronous stream; and a stream group filtering unit which determines a filtering or a forwarding of the isochronous stream on the basis of a stream identifier allocated to each isochronous stream for isochronous stream services in the configured relay path; wherein the path provider comprises: a stream subscription/secession protocol unit which transmits a subscription/secession request for the isochronous streams from the listener station to the talker station and transmits a response for the isochronous streams from the talker station to the listener station; and an authentication unit which provides an authenticated relay path between the talker station and the listener station on the basis of a configuration and a key for the isochronous stream services as the subscription is completed; wherein the key is provided by one of the talker station and the listener station, and is held by the other of the talker station and the listener station.