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Method for fast roaming in a wireless network

  • US 7,263,357 B2
  • Filed: 01/08/2004
  • Issued: 08/28/2007
  • Est. Priority Date: 01/14/2003
  • Status: Active Grant
First Claim
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1. A method of supporting a roaming service in a wireless network having an authentication server and a plurality of access points (APs) connected to the authentication server, the method comprising:

  • deriving from a known master key a first-level security key to be shared between a station STA and an AP with which the STA attempts to associate when the STA attempts to associate with one of the plurality of APs;

    deriving from the first-level security key a second-level security key to be shared between the STA and at least one neighbor AP, the at least one neighbor AP neighboring to the AP with which the STA attempts to associate; and

    providing the second-level security key to the at least one neighbor AP,wherein when the STA attempts to roam to the at least one neighbor AP, the at least one neighbor AP pre-authenticates the STA with the second-level security key.

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