Access technology independent identifier generation
First Claim
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1. A network system for communicating with mobile nodes, the system comprising:
- a first access gateway for communicating with mobile nodes using a first access technology, the first access gateway receiving one or more keys from a mobile node and computing an interface identifier as a function of the one or more keys, wherein the one or more keys are unchanging identifiers that are specific to a particular mobile node, the access gateway communicating with the mobile node to provide a home address that is a function of the interface identifier; and
a second access gateway for communicating with mobile nodes using a second access technology different from the first access technology, the second access gateway receiving the same one or more keys from a mobile node as the first access gateway and using the one or more keys in the same manner as the first access gateway to compute the same interface identifier as a function of the one or more keys;
the second access gateway and the first access gateway thereby determining the same interface identifier when a mobile node moves from communicating with the first access gateway to communicating with the second access gateway.
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Abstract
A network system for communicating with mobile nodes has multiple gateways that can operate with each using a different access technology. In an IPv6 system, the access gateways each provide an interface identifier to the mobile nodes using the same one or more keys and hash so that different the same interface identifier regardless of the access technology used. The access gateways can have multiple options for using keys and/or hashes to provide an interface identifier such that the method for determining the interface identifier is configurable.
16 Citations
20 Claims
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1. A network system for communicating with mobile nodes, the system comprising:
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a first access gateway for communicating with mobile nodes using a first access technology, the first access gateway receiving one or more keys from a mobile node and computing an interface identifier as a function of the one or more keys, wherein the one or more keys are unchanging identifiers that are specific to a particular mobile node, the access gateway communicating with the mobile node to provide a home address that is a function of the interface identifier; and a second access gateway for communicating with mobile nodes using a second access technology different from the first access technology, the second access gateway receiving the same one or more keys from a mobile node as the first access gateway and using the one or more keys in the same manner as the first access gateway to compute the same interface identifier as a function of the one or more keys; the second access gateway and the first access gateway thereby determining the same interface identifier when a mobile node moves from communicating with the first access gateway to communicating with the second access gateway. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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receiving at a first access gateway using a first access technology a transmission from a mobile node, the transmission including one or more keys, wherein the mobile node has previously transmitted the same one or more keys to a second access gateway using a second access technology; computing an interface identifier as a function of the one or more keys, wherein the one or more keys are unchanging identifiers that are specific to the mobile node and the computed interface identifier is the same interface identifier as was previously computed by the second access gateway in response to the previous transmission of the one or more keys to the second gateway; computing at the first access gateway as a function of the interface identifier a home address that is used to identify the mobile node; and transmitting the home address to the mobile node. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. Software encoded on one or more non-transitory computer-readable media and when executed on a first access gateway operable to:
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receive at the first access gateway using a first access technology a transmission from a mobile node, the transmission including one or more keys, wherein the mobile node has previously transmitted the same one or more keys to a second access gateway using a second access technology; compute an interface identifier as a function of the one or more keys, wherein the one or more keys are unchanging identifiers that are specific to the mobile node and the computed interface identifier is the same interface identifier as was previously computed by the second access gateway in response to the previous transmission of the one or more keys to the second gateway; compute at the first access gateway as a function of the interface identifier a home address that is used to identify the mobile node; and transmit the home address to the mobile node. - View Dependent Claims (19, 20)
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Specification