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    CORDLESS IDENTIFICATION SECURITY SYSTEM AND METHOD
    1.
    发明专利
    CORDLESS IDENTIFICATION SECURITY SYSTEM AND METHOD 审中-公开

    公开(公告)号：JP2003132472A

    公开(公告)日：2003-05-09

    申请号：JP2002209844

    申请日：2002-07-18

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： CONNOLLY SEAN A ,  SACKETT WILLIAM ,  SHELLHAMMER STEPHEN J ,  BOCCUZZI FRANK ,  LEVINE ADAM

    IPC: G08B13/22 ,  G01S19/14 ,  G06K17/00 ,  G08B25/00 ,  G08B25/10 ,  H04B7/26

    Abstract: PROBLEM TO BE SOLVED: To provide a system and method for tracking a portable device. SOLUTION: This system for tracking a portable device may include a transmitter which transmits wireless inquiries to a plurality of portable devices and a receiver which receives replies to the inquiries from the portable devices. In addition, this system may include a memory which stores identifier data corresponding to the portable devices and a processor coupled to the memory and to the receiver, and the processor retrieves identifier data uniquely identifying a particular one of the portable devices which have generated the replies from each reply, and compares the identifier data to the stored identifier data. Furthermore, the system may include an alarm system coupled to the processor, and the alarm system is controlled based on the comparison of the stored identifier data to the identifier data retrieved from the replies.

    COEXISTENCE TECHNIQUE IN WIRELESS NETWORK
    2.
    发明专利
    COEXISTENCE TECHNIQUE IN WIRELESS NETWORK 审中-公开

    公开(公告)号：JP2002185476A

    公开(公告)日：2002-06-28

    申请号：JP2001337161

    申请日：2001-09-27

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： SHELLHAMMER STEPHEN J ,  SHARONY JACOB ,  BIUSO ANTHONY D ,  CONNOLLY SEAN A ,  SACKETT WILLIAM ,  CABANA JOSEPH ,  TILLEY PATRICK ,  BEACH ROBERT

    IPC: H04L12/28 ,  H04L12/46 ,  H04L12/56 ,  H04M1/725

    Abstract: PROBLEM TO BE SOLVED: To provide a coexistence technique which is used for frequency coordination between two different network protocols, such as the IEEE 802.11 and Bluetooth protocols, operating in proximity with one another. SOLUTION: Coordination is accomplished by the use of a first radio transceiver operating in accordance with a first communication protocol (which may be the 802.11 protocol) and using a frequency band (which may be the 2.4 GHz band), a base station connected to a wired network and operating in accordance with the first communication protocol, a second radio transceiver operating in accordance with a second communication protocol (which may be the Bluetooth protocol) and using the frequency band, and a coordinator associated with the base station for, in turn, activating the first radio transceiver, deactivating the first radio transceiver, activating the second radio transceiver, and deactivating the second radio transceiver.

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