Security sensing method and apparatus
First Claim
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1. A method for performing security sensing, comprising:
- using an optical data transceiver to illuminate a secured space with an optical data signal which has been modulated to contain a first data sequence which includes at least a portion of a management frame defined for a predetermined wireless communication protocol;
concurrently receiving at the optical data transceiver a plurality of retroreflected optical data signals which have been respectively retroreflected from a plurality of reflector elements disposed in the secured space in response to the optical data signal;
authenticating one or more of the plurality of retroreflected optical data signals by determining whether the first data sequence is present therein; and
selectively generating a security event notification to an enterprise security management controller if a variation occurs in regard to at least one optical beam condition associated with one or more of the plurality of retroreflected optical data signals, the variation selected from the group consisting of a disruption of the optical beam and a displacement of the optical beam.
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Abstract
Optical data transceiver is used to illuminate a secured space with an optical data signal which has been modulated to contain a first data sequence. One or more retroreflected optical data signals are received at the optical data transceiver from reflector elements disposed in the secured space. The retroreflected optical data signals are authenticated and a security event notification is selectively communicated to an enterprise security management controller if a variation occurs in regard to at least one retroreflected optical beam condition. The variation can involve a disruption of the optical beam and/or a displacement of the optical beam.
118 Citations
21 Claims
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1. A method for performing security sensing, comprising:
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using an optical data transceiver to illuminate a secured space with an optical data signal which has been modulated to contain a first data sequence which includes at least a portion of a management frame defined for a predetermined wireless communication protocol; concurrently receiving at the optical data transceiver a plurality of retroreflected optical data signals which have been respectively retroreflected from a plurality of reflector elements disposed in the secured space in response to the optical data signal; authenticating one or more of the plurality of retroreflected optical data signals by determining whether the first data sequence is present therein; and selectively generating a security event notification to an enterprise security management controller if a variation occurs in regard to at least one optical beam condition associated with one or more of the plurality of retroreflected optical data signals, the variation selected from the group consisting of a disruption of the optical beam and a displacement of the optical beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for performing security sensing, comprising:
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using an optical data transceiver to illuminate a secured space with an optical data signal which has been modulated to contain a first data sequence; concurrently receiving at the optical data transceiver a plurality of retroreflected optical data signals which have been respectively retroreflected from a plurality of reflector elements disposed in the secured space in response to the optical data signal; authenticating one or more of the plurality of retroreflected optical data signals by determining whether the first data sequence is present therein; selectively generating a security event notification to an enterprise security management controller if a variation occurs in regard to at least one optical beam condition associated with one or more of the plurality of retroreflected optical data signals, the variation selected from the group consisting of a disruption of the optical beam and a displacement of the optical beam; and selectively changing a wavelength of an optical radiation used for said optical data signal used to illuminate the secured space. - View Dependent Claims (12)
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13. An optical data transceiver, comprising:
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an optical transmitter unit configured to illuminate at least a portion of a secured space with an optical data signal which has been modulated to contain a first data sequence; an optical receiver unit configured to concurrently receive a plurality of retroreflected optical data signals which have been respectively retroreflected from a plurality of reflector elements disposed in the secured space in response to the optical data signal; a network interface device to facilitate digital data communications in accordance with a data network communication protocol as between a digital data network and at least one of the optical data transmitter and the optical data receiver; and at least one processing element which is configured to; receive a plurality of digital data streams extracted respectively from the plurality of retroreflected optical data signals; authenticate one or more of the plurality of retroreflected optical data signals by determining whether the first data sequence is present therein; detect a variation in regard to at least one optical beam condition associated with one or more of the plurality of retroreflected optical data signals, the variation selected from the group consisting of a disruption of the optical beam and a displacement of the optical beam; and selectively generate a security event notification message if the variation is detected; wherein the at least one processing element is configured to perform processing operations involving optical signals received by the optical receiver unit and optical signals transmitted by the optical transmitter unit to facilitate wireless network access to the computer data network for a plurality of client devices. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. An optical security sensing apparatus, comprising:
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a plurality of retroreflectors disposed in a secured area; and an optical transceiver including an optical transmitter unit configured to illuminate at least a portion of the secured space with an optical data signal which has been modulated to contain a first data sequence, an optical receiver unit configured to concurrently receive a plurality of retroreflected optical data signals which have been respectively retroreflected from the plurality of reflector elements in response to the optical data signal, and at least one processing element which is configured to receive a plurality of digital data streams extracted respectively from the plurality of retroreflected optical data signals, determine whether the first data sequence is present in one or more of the plurality of retro-reflected optical data signals, detect a variation in regard to at least one optical beam condition associated with one or more of the plurality of retroreflected optical data signals, the variation selected from the group consisting of an disruption of the optical beam and a displacement of the optical beam, and selectively generate a security event notification message if the variation is detected; wherein the optical transceiver is configured to function as a wireless network access point, and the optical data signal comprises at least a portion of a management frame defined for a predetermined wireless communication protocol.
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Specification