Patent ID: 7242923
Filing Date: 2007-07-10
Classification: H04M,H04W

Abstract:
1. A method for authenticating a wireless device with a fixed station, the method comprising the steps of: receiving a first authentication request from the wireless device at the fixed station when the wireless device detects that the fixed station is in close proximity, the first authentication request including a first unique identifier for identifying the wireless device and a second unique identifier for identifying the fixed station; receiving a second authentication request from the fixed station at the wireless device when the fixed station detects that the wireless device is in close proximity, the second authentication request including the second unique identifier for identifying the fixed station; authenticating the wireless device with the fixed station based on whether the second unique identifier received in the first authentication request matches the second unique identifier received in the second authentication request, and also based on whether the first unique identifier received in the first authentication request is associated in an authentication database with the second unique identifier received in the second authentication request; and assuming the identity of the wireless device at the fixed station after authenticating the wireless device with the fixed station; wherein the first authentication request further includes a first time stamp based on when the wireless device detected that the fixed station was in close proximity, the second authentication request further includes a second time stamp based on when the fixed station detected that the wireless device was in close proximity, and in the authenticating step, the wireless device is authenticated with the fixed station only if the first time stamp received in the first authentication request substantially matches the second time stamp received in the second authentication request.