On-site communication system with RF shielding having pager identification capability
First Claim
1. In an on-site communication system including an on-site transmitter for transmitting, on a predetermined frequency within a predetermined coverage area, messages to a plurality of portable communication receivers, the portable communication receivers including acknowledge back response capability, a system for the identification of the portable communication receivers comprises:
- entry means, for allowing access into the predetermined coverage area, said entry means including RF shielding means for shielding the portable communication receivers located therein from the message transmissions by the on-site transmitter;
detector means, coupled to said entry means for detecting the presence of the portable communication receivers within said entry means;
identification transmitter means, coupled to said detector means, for transmitting within said RF shielding means a query signal on the predetermined frequency in response to one of the plurality of portable communication receivers being detected within said entry means; and
identification receiver means, coupled to said entry means, for receiving an acknowledge back signal transmitted by the portable communication receiver located within said RF shielding means in response to the query signal being transmitted, the received acknowledge back signal providing identification of the portable communication receiver entering said entry means.
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Accused Products
Abstract
An on-site communication system includes a system for identifying communication receivers including acknowledge back capability and operating within the on-site communication system, and for controlling the delivery of messages to the communication receivers. The identification system operates on the same frequency as the on-site communication system, and includes an RF shielded enclosure for momentarily shielding the communication receivers from messsages transmitted on the on-site communication system. The RF shielded enclosure provides interference free identification of the communication receivers as the communication receivers pass through the enclosure, and enables the determination of those communication receivers which are operating within the coverage area of the on-site communication system, and those communication receivers which have left the coverage area of the on-site communication system.
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Citations
19 Claims
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1. In an on-site communication system including an on-site transmitter for transmitting, on a predetermined frequency within a predetermined coverage area, messages to a plurality of portable communication receivers, the portable communication receivers including acknowledge back response capability, a system for the identification of the portable communication receivers comprises:
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entry means, for allowing access into the predetermined coverage area, said entry means including RF shielding means for shielding the portable communication receivers located therein from the message transmissions by the on-site transmitter; detector means, coupled to said entry means for detecting the presence of the portable communication receivers within said entry means; identification transmitter means, coupled to said detector means, for transmitting within said RF shielding means a query signal on the predetermined frequency in response to one of the plurality of portable communication receivers being detected within said entry means; and identification receiver means, coupled to said entry means, for receiving an acknowledge back signal transmitted by the portable communication receiver located within said RF shielding means in response to the query signal being transmitted, the received acknowledge back signal providing identification of the portable communication receiver entering said entry means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An identification system, for use in an on-site communication system having a predetermined coverage area, and including an on-site transmitter operating on a predetermined frequency for the transmission of messages, said identification system comprising:
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a portable communication receiver having acknowledge back response capability, for receiving the messages transmitted by the on-site transmitter; entry means, for allowing access into the predetermined coverage area, said entry means including RF shielding means for shielding said portable communication receiver located therein from the message transmissions by the on-site transmitter; detector means, coupled to said entry means, for detecting the presence of said portable communication receiver within said entry means; identification transmitter means, coupled to said detector means, for transmitting, within said RF shielding means, a query signal in response to said portable communication receiver being detected within said entry means; and identification receiver means, coupled to said entry means, for receiving an acknowledge back signal transmitted by said portable communication receiver located within said RF shielding means in response to the query signal being transmitted, the received acknowledge back signal providing identification of said portable communication receiver entering said entry means. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for identifying a portable communication receiver having acknowledge back response capability which operates in a communication system having an on-site transmitter operating on a predetermined frequency for providing on-site system coverage within a predetermined coverage area, said method comprising the steps of:
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providing entry means for access into the on-site coverage area, the entry means including RF shielding means for shielding the portable communication receiver from the message transmissions by the on-site transmitter; detecting the presence of the portable communication receiver within the entry means; transmitting within the RF shielding means a query signal on the predetermined frequency in response to the portable communication receiver being detected within the entry means; and receiving within the RF shielding means an acknowledge back signal transmitted by the portable communication receiver in response to the transmitted query signal, the received acknowledge back signal providing identification of the portable communication receiver entering said entry means. - View Dependent Claims (16, 17, 18, 19)
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Specification