Virtual private network with mobile nodes
First Claim
1. A virtual private network including an internal secured portion which connects via at least a first gateway and a second gateway to an external portion, the network comprising:
- a plurality of workstations including at least one mobile workstation in the external portion;
the first gateway;
the second gateway; and
means for automatically changing the point through which the mobile workstation communicates with the internal portion of the network from the first gateway to the second gateway, in response to movement of the mobile workstation.
1 Assignment
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Accused Products
Abstract
A virtual private network has an internal secured portion which connects to an external portion, the network via at least a first gateway and via a second gateway. There are a plurality of workstations including at least one mobile workstation in the external portion. The network automatically changes the point through which the mobile workstation communicates with the internal portion of the network from the first gateway to the second gateway, in response to movement of the mobile workstation. Context information is transferred to the second gateway. The context information includes an identifier of the mobile workstation and may also include material for defining secure communication means by which information is transferable securely between the mobile workstation in the external portion of the network and the internal portion of the network, via the second gateway.
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Citations
34 Claims
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1. A virtual private network including an internal secured portion which connects via at least a first gateway and a second gateway to an external portion, the network comprising:
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a plurality of workstations including at least one mobile workstation in the external portion;
the first gateway;
the second gateway; and
means for automatically changing the point through which the mobile workstation communicates with the internal portion of the network from the first gateway to the second gateway, in response to movement of the mobile workstation. - 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, 30, 31)
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28. A method of optimizing the route by which information travels between a mobile node in an external portion of a network and a correspondent node in an internal portion of a network, comprising the steps of:
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determining when a first serving gateway through which the mobile node communicates with the internal portion of the network, is sub-optimal;
identifying a second gateway; and
transferring the point through which the mobile node communicates with the internal portion of the network from the first serving gateway to the second gateway.
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29. A mobile workstation for connecting to an external portion of a network that includes an internal secured portion connected, via a first gateway and a second gateway to the external portion, comprising:
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means arranged to receive, via the first secure communication means, an identifier of a second gateway; and
means arranged to change from communicating with the internal portion of the network through the first gateway to communicating via the second gateway.
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32. (canceled)
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33. (canceled)
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34. (canceled)
Specification