Facilitating 802.11 roaming by pre-establishing session keys
First Claim
1. A method of reducing handoff latency of a mobile node MN roaming between access points in a wireless network WLAN, the method comprising:
- authenticating the mobile node MN with an access point AP to produce a pairwise master key PMK;
establishing a pairwise transient key PTK as a link layer session key to provide secure communication of 802.1X messages and 802.11 data between the mobile node MN and the access point AP; and
, associating the mobile node MN with the access point AP in said wireless network WLAN.
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Abstract
A method and system for pre-authenticating a pre-establishing key management on a roaming device prior to reassociation to facilitate fast hand-off in a wireless network is described. For enhanced mobility, both authentication and key establishment is performed prior to reassociation of the roaming device between access points. When the roaming device enters in contact with one of the access points, a local authentication is performed between the access point and the roaming device prior to reassociation with the access point to allow for fast hand-offs of the device between access points within the network.
139 Citations
30 Claims
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1. A method of reducing handoff latency of a mobile node MN roaming between access points in a wireless network WLAN, the method comprising:
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authenticating the mobile node MN with an access point AP to produce a pairwise master key PMK;
establishing a pairwise transient key PTK as a link layer session key to provide secure communication of 802.1X messages and 802.11 data between the mobile node MN and the access point AP; and
,associating the mobile node MN with the access point AP in said wireless network WLAN. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In a wireless network WLAN including at least one mobile node MN roaming between access points of the wireless network WLAN, a system for reducing handoff latency, the system comprising:
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means for authenticating the mobile node MN with an access point AP to produce a pairwise master key PMK;
means for establishing a pairwise transient key PTK as a link layer session key to provide secure communication of 802.1X messages and 802.11 data between the mobile node MN and the access point AP; and
,means for associating the mobile node MN with the access point AP in said wireless network WLAN. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An article of manufacture comprising a program storage medium readable by a computer and embodying one or more instructions executable by the computer to perform method steps for executing a command to perform method of reducing handoff latency of a mobile node MN roaming between access points in a wireless network WLAN, the method comprising:
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authenticating the mobile node MN with an access point AP to produce a pairwise master key PMK;
establishing a pairwise transient key PTK as a link layer session key to provide secure communication of 802.1X messages and 802.11 data between the mobile node MN and the access point AP; and
,associating the mobile node MN with the access point AP in said wireless network WLAN. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification