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US 5,517,618 AGranted
Mobile migration communications control device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHiromi Wada, Takashi Yozawa, Tatsuya Ohnishi
Estimating the term…
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 The packet transfer unit receives a packet which was destined for an outdated address of the mobile node, generates a conversion packet which holds an updated address instead of the outdated address, and then transmits the conversion packet, while an address post unit transmits an address post message which indicates the updated address to the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. The migration post unit transmits to the first migration control unit a migration post message which indicates the updated address when the mobile node migrates to another network while a packet resumption unit receives the conversion packet from both the first migration control unit and the third migration control unit and resumes an original packet from the conversion packet. The third migration control unit comprises a packet conversion unit which converts a destination address of a packet into the updated address, then transmits it to the mobile node.
A migration communication control device constructed to control a communication between a mobile node and a partner node, the mobile node migrating across networks and obtaining an address assigned on each network while the partner node being a communication partner of the mobile node, comprising a first migration control unit, a second migration control unit, a third migration control unit, the second migration control unit being placed on the mobile node and the third migration control unit being placed on the partner node,
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
Translation of Internet protocol [IP] addresses: maintenance or indexing of mapping tables
Network arrangements, protocols or services for addressing or naming
Mapping addresses: of the same type
Of the same type: translation of Internet protocol [IP] addresses
Term ended 14 May 2013 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
(1) Field of the Invention
The present invention relates to a migration communication control device that controls a communication between a mobile node and a corresponding node to enable them to communicate continuously when the former migrates by managing addresses assigned to the former each time it migrates across networks.
(2) Description of the Related Art
These and the other objects, advantages and features of the invention will become apparent from the following description thereof taken in conjunction with the accompanying drawings which illustrate a specific embodiment of the invention. In the drawings:
FIG. 1 is a block diagram depicting a construction of a migration communication control device in a first embodiment of the present invention;
FIG. 2 is a block diagram depicting a detailed construction of the migration communication control device employed as a mobile node in the first embodiment of the present invention;
[Embodiment 1]
A construction of a migration communication control device in a first embodiment of the present invention is described hereunder with referring to FIGS. Hereinafter, the mobile node and partner node in the related art as well as in the summary of the invention are referred to as a mobile host and a stationary host, respectively.
FIG. 1 is an illustration showing the construction of the migration communication control device comprising a data hold unit 1, an application unit 2, a migration address unit 3, and a communication control unit 4.