Method and apparatus for communication control of mobile computers in communication network systems using private IP addresses
First Claim
1. A method for controlling communications in a communication network system formed by a plurality of computers for communicating data with each other through a plurality of interconnected networks, said plurality of computers including at least one mobile computer for communicating data while changing a location in the communication network system, the method comprising the steps of:
- (a) when the mobile computer is located within a home network of the mobile computer, carrying out a communication with the mobile computer by transferring communication data using a first location identifier specific to the mobile computer which is uniquely defined within own organization networks of the mobile computer;
(b) when the mobile computer is located within an external own organization network, carrying out a communication with the mobile computer by routing communication data to the external own organization network using a third location identifier indicating a current visited location of the mobile computer in the communication network system which is uniquely defined over all the networks, and addressing the mobile computer within the external own organization network using the first location identifier; and
(c) when the mobile computer is located within an external other organization network, carrying out a communication with the mobile computer by routing communication data to the external other organization network using the third location identifier, and addressing the mobile computer within the external other organization network using a second location identifier assigned to the mobile computer at a time of moving outside the own organization networks which is uniquely defined over all the networks.
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Abstract
A communication control in a communication network system using a mobile computer, capable of realizing flexible address control and management for the mobile computer. When the mobile computer is located within a home network, a communication with the mobile computer is carried out by transferring data using a home address specific to the mobile computer which is a private address. When the mobile computer is located within an external own organization network, a communication with the mobile computer is carried out by routing data to the external own organization network using a care-of address indicating a current visited location of the mobile computer in the system which is a global address, and addressing the mobile computer within the external own organization network using the home address. When the mobile computer is located within an external other organization network, a communication with the mobile computer is carried out by routing data to the external other organization network using the care-of address, and addressing the mobile computer within the external other organization network using a mobile address assigned to the mobile computer at a time of moving outside the own organization networks which is a global address.
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Citations
43 Claims
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1. A method for controlling communications in a communication network system formed by a plurality of computers for communicating data with each other through a plurality of interconnected networks, said plurality of computers including at least one mobile computer for communicating data while changing a location in the communication network system, the method comprising the steps of:
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(a) when the mobile computer is located within a home network of the mobile computer, carrying out a communication with the mobile computer by transferring communication data using a first location identifier specific to the mobile computer which is uniquely defined within own organization networks of the mobile computer;
(b) when the mobile computer is located within an external own organization network, carrying out a communication with the mobile computer by routing communication data to the external own organization network using a third location identifier indicating a current visited location of the mobile computer in the communication network system which is uniquely defined over all the networks, and addressing the mobile computer within the external own organization network using the first location identifier; and
(c) when the mobile computer is located within an external other organization network, carrying out a communication with the mobile computer by routing communication data to the external other organization network using the third location identifier, and addressing the mobile computer within the external other organization network using a second location identifier assigned to the mobile computer at a time of moving outside the own organization networks which is uniquely defined over all the networks. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A relay device for relaying communication data in a communication network system formed by a plurality of computers for communicating data with each other through a plurality of interconnected networks, said plurality of computers including at least one mobile computer for communicating data while changing a location in the communication network system, the relay device being provided in a home network of the mobile computer and comprising:
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management means for managing an address information for the mobile computer within own organization networks of the mobile computer, the address information containing a corresponding set of a first location identifier, a second location identifier and a third location identifier, the first location identifier being a location identifier specific to the mobile computer which is uniquely defined within the own organization networks, the second location identifier being a location identifier reserved for the mobile computer which is uniquely defined over all the networks, and the third location identifier being a location identifier indicating a current visited location of the mobile computer in the communication network system which is uniquely defined over all the networks; and
processing means for obtaining the third location identifier corresponding to the first location identifier or the second location identifier of a destination computer attached to communication data transmitted from a source computer according to the address information, and transferring the communication data by attaching the obtained third location identifier to the destination computer. - View Dependent Claims (34, 35, 36, 37, 39, 40, 41, 42, 43)
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38. A data packet processing device for processing communication data in a communication network system formed by a plurality of computers for communicating data with each other through a plurality of interconnected networks, said plurality of computers including at least one mobile computer for communicating data while changing a location in the communication network system, the data packet processing device being provided in a home network of the mobile computer and comprising:
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management means for managing an address information for the mobile computer within own organization networks of the mobile computer, the address information containing a corresponding set of a first location identifier, a second location identifier and a third location identifier, the first location identifier being a location identifier specific to the mobile computer which is uniquely defined within the own organization networks, the second location identifier being a location identifier reserved for the mobile computer which is uniquely defined over all the networks, and the third location identifier being a location identifier indicating a current visited location of the mobile computer in the communication network system which is uniquely defined over all the networks; and
processing means for receiving communication data transmitted from a relay device provided in the home network of the mobile computer which is encapsulated using the third location identifier corresponding to the first location identifier, then decapsulating the communication data using the third location identifier, then encapsulating the communication data using the second location identifier corresponding to the third location identifier, then encapsulating the communication data using the third location identifier, and then transmitting the communication data to an external other organization network, when the mobile computer is located within the external other organization network and the communication data has a destination specified by the first location identifier.
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Specification