US 11,750,535 B2
Transmitting device, receiving device, packet transfer system,packet transfer method, and packet transfer program
Hiroto Takechi, Musashino (JP); Hideki Maeda, Musashino (JP); Daisaku Shimazaki, Musashino (JP); Masaaki Inami, Musashino (JP); Katsuhiro Araya, Musashino (JP); Masatoshi Namiki, Musashino (JP); and Masahiro Yokota, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/619,808
Filed by Nippon Telegraph and Telephone Corporation, Tokyo (JP)
PCT Filed Jun. 20, 2019, PCT No. PCT/JP2019/024484
§ 371(c)(1), (2) Date Dec. 16, 2021,
PCT Pub. No. WO2020/255327, PCT Pub. Date Dec. 24, 2020.
Prior Publication US 2022/0353206 A1, Nov. 3, 2022
Int. Cl. H04L 49/9057 (2022.01); H04L 49/253 (2022.01); H04L 49/90 (2022.01)
CPC H04L 49/9057 (2013.01) [H04L 49/254 (2013.01); H04L 49/9094 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A transmission device comprising:
a flow storage unit that stores identification information about target flow that is uninterruptible;
a transmission-side identification unit that identifies whether a received packet is from the target flow or a non-target flow based on determining whether a combination of a destination address, a source address, and a type of service of the received packet or a combination of a virtual local area network-identifier and a class of service of the received packet matches a record included in the identification information about the target flow stored in the flow storage unit;
a tag application unit that applies, to packets from the target flow, an uninterruptible identifier indicating that the packets are from the target flow and a sequence number for distinguishing the packets from other packets; and
a branch unit that branches the packets from the target flow processed by the tag application unit into i) packets to be transferred to an active path, that directly connects the transmission device and a reception device, and ii) packets to be transferred to a backup path, that connects the transmission device to the reception device via a relay device.