Patent ID: 9253083
Filing Date: 2016-02-02
CPC Classification: H04L

Claim Text:
1. A network system comprising: a master transmission apparatus; a plurality of transmission apparatuses; and a ring-type network in which a first virtual transmission line that transmits, in a first direction, a transmission frame to be transmitted and received between the master transmission apparatus and the plurality of transmission apparatuses and a second virtual transmission line that transmits the transmission frame in a second direction different from the first direction are formed; wherein the master transmission apparatus includes: wherein each of the plurality of transmission apparatuses includes: wherein when the destination address is rewritten for at least one of the transmission frame to be transmitted to the first virtual transmission line and the transmission frame to be transmitted to the second virtual transmission line, the arithmetic device adds the destination address before the rewrite to an area other than an address area of the transmission frame; and wherein when the destination address is added to the area other than the address area of the transmission frame received from the first virtual transmission line and the second virtual transmission line, the path switch rewrites the destination address of the received transmission frame using the destination address.