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).
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Patent number: 8054841Abstract: 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 The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the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: GrantFiled: December 23, 2009Date of Patent: November 8, 2011Assignee: Panasonic CorporationInventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Publication number: 20100098026Abstract: 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 The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the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: ApplicationFiled: December 23, 2009Publication date: April 22, 2010Inventors: Hiromi Wada, Takashi YOZAWA, Tatsuya OHNISHI
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Patent number: 7664086Abstract: 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: GrantFiled: September 7, 2006Date of Patent: February 16, 2010Assignee: Panasonic CorporationInventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Patent number: 7620025Abstract: 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: GrantFiled: June 12, 2006Date of Patent: November 17, 2009Assignee: Panasonic CorporationInventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Patent number: 7272127Abstract: 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: GrantFiled: July 12, 2002Date of Patent: September 18, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Publication number: 20070019612Abstract: 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: ApplicationFiled: September 7, 2006Publication date: January 25, 2007Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Patent number: 7158513Abstract: 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: GrantFiled: June 25, 2002Date of Patent: January 2, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Patent number: 7130290Abstract: 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: GrantFiled: July 12, 2002Date of Patent: October 31, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Publication number: 20060227755Abstract: 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: ApplicationFiled: June 12, 2006Publication date: October 12, 2006Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Patent number: 7110401Abstract: 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: GrantFiled: June 28, 2002Date of Patent: September 19, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Publication number: 20030007481Abstract: 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: ApplicationFiled: June 28, 2002Publication date: January 9, 2003Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Publication number: 20020191586Abstract: 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: ApplicationFiled: July 12, 2002Publication date: December 19, 2002Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Publication number: 20020181420Abstract: 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: ApplicationFiled: July 12, 2002Publication date: December 5, 2002Inventors: Hiromi Wada, Takashi Yozawa, Takashi Yozawa, Tatsuya Ohnishi
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Publication number: 20020167927Abstract: 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: ApplicationFiled: June 25, 2002Publication date: November 14, 2002Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Publication number: 20020159455Abstract: 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: ApplicationFiled: June 25, 2002Publication date: October 31, 2002Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Patent number: 6456621Abstract: 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: GrantFiled: August 19, 1998Date of Patent: September 24, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Patent number: 5845079Abstract: 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: GrantFiled: April 19, 1996Date of Patent: December 1, 1998Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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Patent number: 5517618Abstract: 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: GrantFiled: February 8, 1993Date of Patent: May 14, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiromi Wada, Takashi Yozawa, Tatsuya Ohnishi