METHOD AND APPARATUS FOR SECURITY IN A WIRELESS NETWORK
First Claim
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1. A method for preventing unauthorized transmitters from gaining access to a wireless network comprising the steps of:
- receiving signals with an antenna system that has more than one output port, computing a first output with a first receiving pattern that has a main beam pointed towards an authorized transmitter, computing a second output with a second receiving pattern that has a null in the direction of said authorized transmitter and is larger in magnitude than said first receiving pattern, computing the energy of said first output, computing the energy of said second output, and transmitting information contained in said first output to said network only if said energy of said first output is larger than said energy of said second output.
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Abstract
The present invention relates to an apparatus and method for preventing unauthorized users from gaining access to a wireless network. A processor allows only data transmissions from the directions of the authorized users to access the network. Data transmissions from other directions are not allowed to access the network. The present invention also relates to a method and apparatus fore transmitting information only in selected directions, while in directions not selected, information cannot be inferred from the transmitted signal or signals.
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Citations
12 Claims
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1. A method for preventing unauthorized transmitters from gaining access to a wireless network comprising the steps of:
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receiving signals with an antenna system that has more than one output port, computing a first output with a first receiving pattern that has a main beam pointed towards an authorized transmitter, computing a second output with a second receiving pattern that has a null in the direction of said authorized transmitter and is larger in magnitude than said first receiving pattern, computing the energy of said first output, computing the energy of said second output, and transmitting information contained in said first output to said network only if said energy of said first output is larger than said energy of said second output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12-37. -37. (canceled)
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