Patents by Inventor Nagayuki Hirota

Nagayuki Hirota has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8817683
    Abstract: In a network relay router 10, a multicast routing protocol processing module 11A sequentially sends a join request message (CP1) to a router 30a functioning as a rendezvous point via an interface 101, based on the settings of a multicast group address or destination address and a sender VRF name. The network relay router 10 receives a multicast packet (DP1) from the router 30a via the interface 101 and acquires a sender address or source address of a transmission device SE from the received multicast packet. The network relay router 10 sends a join request message (CP2) via an interface 102 on the side of the transmission device SE and receives a multicast packet via the interface 102. This establishes an optimum multicast route (MR) between the transmission device SE and the network relay router 10.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: August 26, 2014
    Assignee: Alaxala Networks Corporation
    Inventors: Toshiyuki Kubo, Keisuke Kadowaki, Nagayuki Hirota, Hidehiro Fukushima
  • Publication number: 20100303073
    Abstract: In a network relay router 10, a multicast routing protocol processing module 11A sequentially sends a join request message (CP1) to a router 30a functioning as a rendezvous point via an interface 101, based on the settings of a multicast group address or destination address and a sender VRF name. The network relay router 10 receives a multicast packet (DP1) from the router 30a via the interface 101 and acquires a sender address or source address of a transmission device SE from the received multicast packet. The network relay router 10 sends a join request message (CP2) via an interface 102 on the side of the transmission device SE and receives a multicast packet via the interface 102. This establishes an optimum multicast route (MR) between the transmission device SE and the network relay router 10.
    Type: Application
    Filed: May 25, 2010
    Publication date: December 2, 2010
    Applicant: ALAXALA NETWORKS CORPORATION
    Inventors: Toshiyuki KUBO, Keisuke KADOWAKI, Nagayuki HIROTA, Hidehiro FUKUSHIMA
  • Patent number: 7170885
    Abstract: A packet switching is performed according to a routing information for relaying particular packets which is produced by the route computation based on the information of a received packet and the kept parts-of-routing-information useful as a basis for the route computation. At this time, the route through which the packet is relayed is determined on the basis of the kept parts-of-routing-information before the route computation. Then, the received packet is relayed according to the determined route. Next, a new routing information is produced by the route computation based on the information of the received packet and the parts-of-routing-information. Thereafter, the succeeding packets of the same route are relayed on the basis of the new routing information.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: January 30, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Nagayuki Hirota, Hiroshi Sekino, Shigeki Morimoto, Yoshihito Sako, Masashi Fukuda
  • Publication number: 20030123429
    Abstract: A packet switching is performed according to a routing information for relaying particular packets which is produced by the route computation based on the information of a received packet and the kept parts-of-routing-information useful as a basis for the route computation. At this time, the route through which the packet is relayed is determined on the basis of the kept parts-of-routing-information before the route computation. Then, the received packet is relayed according to the determined route. Next, a new routing information is produced by the route computation based on the information of the received packet and the parts-of-routing-information. Thereafter, the succeeding packets of the same route are relayed on the basis of the new routing information.
    Type: Application
    Filed: February 11, 2003
    Publication date: July 3, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Nagayuki Hirota, Hiroshi Sekino, Shigeki Morimoto, Yoshihito Sako, Masashi Fukuda
  • Patent number: 6542496
    Abstract: A packet switching is performed according to a routing information for relaying particular packets which is produced by the route computation based on the information of a received packet and the kept parts-of-routing-information useful as a basis for the route computation. At this time, the route through which the packet is relayed is determined on the basis of the kept parts-of-routing-information before the route computation. Then, the received packet is relayed according to the determined route. Next, a new routing information is produced by the route computation based on the information of the received packet and the parts-of-routing-information. Thereafter, the succeeding packets of the same route are relayed on the basis of the new routing information.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: April 1, 2003
    Assignees: Hitachi, Ltd., Hitachi Information Technology Co., Ltd.
    Inventors: Nagayuki Hirota, Hiroshi Sekino, Shigeki Morimoto, Yoshihito Sako, Masashi Fukuda