Patents by Inventor Takashi Yozawa

Takashi Yozawa 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: 8054841
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: November 8, 2011
    Assignee: Panasonic Corporation
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Publication number: 20100098026
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Application
    Filed: December 23, 2009
    Publication date: April 22, 2010
    Inventors: Hiromi Wada, Takashi YOZAWA, Tatsuya OHNISHI
  • Patent number: 7664086
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: February 16, 2010
    Assignee: Panasonic Corporation
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Patent number: 7620025
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: November 17, 2009
    Assignee: Panasonic Corporation
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Patent number: 7272127
    Abstract: A partner node and a method of communication control with a mobile node that is a communication partner with the partner mode is provided. The mobile node can provide a migration destination address, via a migration post massage transmitted from the mobile node, that can be acquired by an address acquiring unit at the partner node. A packet convert unit can, before the address acquire unit acquires a new migration destination address, generate a packet destined for a pre-migration address of the mobile node. After the address acquire unit acquires a migration destination address, the packet convert unit can generate a final packet configuration destined for the obtained migration destination address. Accordingly, a continuous communication between the corresponding partner node and the mobile node is maintained as the mobile node migrates across networks.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: September 18, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Publication number: 20070019612
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Application
    Filed: September 7, 2006
    Publication date: January 25, 2007
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Patent number: 7158513
    Abstract: A partner node migration control unit that permits a communication control device, for example of the type carried by a user, to efficiently move across a network, whereby a mobile node can obtain an address assigned to each network and a partner node, which is a communication partner of the mobile node. The migration communication control device, including an address post message receiving unit receiving an address post message indicating the update address of the mobile node from a packet transfer migration control unit. In turn, the packet transfer migration control unit can transmit an updated address of the mobile node to the partner node. A packet conversion unit converts a destination address of the packet to be transmitted to the mobile node into an update address, indicated by the address post message.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: January 2, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Patent number: 7130290
    Abstract: A mobile node is provided having an address-obtaining unit that can obtain a temporary address that is assigned to the mobile node for each network to which the mobile node migrates. The temporary address is held an address hold unit and corresponds with a home address that has been set in advance. Additionally, an address post processing unit can post an address post message including the temporary address to a home migration host position control unit that manages addresses of the mobile node.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: October 31, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Publication number: 20060227755
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Application
    Filed: June 12, 2006
    Publication date: October 12, 2006
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Patent number: 7110401
    Abstract: A home migration host position control device includes an address post processing unit that is capable of receiving an address post message from the mobile node when it migrates to a different network and is assigned a new temporary address. A home migration host list hold unit can store address information that correlates the temporary address with a home address that is contained in the address post message. A packet transfer unit that can, upon receiving a packet that is destined for the home address of the mobile node, transfer a capsulated packet that is generated by attaching to the received packet a header that indicates a destination address by a temporary address that is correlated with a home address according to address information that is stored in the home migration host list hold unit.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: September 19, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Publication number: 20030007481
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 9, 2003
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Publication number: 20020191586
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Application
    Filed: July 12, 2002
    Publication date: December 19, 2002
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Publication number: 20020181420
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Application
    Filed: July 12, 2002
    Publication date: December 5, 2002
    Inventors: Hiromi Wada, Takashi Yozawa, Takashi Yozawa, Tatsuya Ohnishi
  • Publication number: 20020167927
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Application
    Filed: June 25, 2002
    Publication date: November 14, 2002
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Publication number: 20020159455
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Application
    Filed: June 25, 2002
    Publication date: October 31, 2002
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Patent number: 6456621
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: September 24, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Patent number: 5845079
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: December 1, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
  • Patent number: 5517618
    Abstract: Disclosed is a migration communication control device constructed to control a continuous communication between a mobile node and a node unaffected the mobile node's migration. The migration communication control device comprises a first migration control unit, a second migration control unit on the mobile node, and a third migration control unit on the partner node. The first migration control unit comprises a packet transfer unit and an address post unit. The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the third migration control unit. The second migration control unit comprises a migration post unit and a packet resumption unit.
    Type: Grant
    Filed: February 8, 1993
    Date of Patent: May 14, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi