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    21.
    发明专利
    未知

    公开(公告)号：DE60216209T2

    公开(公告)日：2007-09-13

    申请号：DE60216209

    申请日：2002-09-25

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： WILLINS BRUCE A ,  GOREN DAVID ,  VOLKOMMER RICHARD M

    IPC: G01S5/06 ,  G01S15/46 ,  G01S5/22 ,  H04R5/033

    Abstract: An object locator system (100) generates an audio signal as if emanating from the object (118) as a user (102) varies angular orientation and distance from an object (118) or site to be located within an area. A computer (106) linked to an access transceiver (110,112) receives transmissions from a user (102) wearing a headset (104) including a transceiver (202) and electronic compass (122). The compass (122) provides a signal indicative of the user orientation. An access transceiver (110,112) receives the signal and calculates the location of the user (102) based on the time difference of arrival of the RF signal and triangulation of the user movement. An accelerometer (204) in the headset (104) continuously tracks user movement. The location of the object (118) in a vertical direction is provided by a directory or other reference source stored in the computer (106). Based on the angular orientation, horizontal and vertical distance of the object (118) or site relative to the user (102), the computer (106) maps the location information into sounds in the form of pulse amplitude or frequency modulated sound. The audio signal is perceived by the user (102) as emanating from the object (118) or site.

    SIGNAL DETECTION ARRANGEMENT
    22.
    发明专利
    SIGNAL DETECTION ARRANGEMENT 未知

    公开(公告)号：CA2617112A1

    公开(公告)日：2007-02-08

    申请号：CA2617112

    申请日：2006-07-27

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： WILLINS BRUCE A ,  WANG HUAYAN AMY ,  BEKRITSKY BENJAMIN

    IPC: H04L12/28

    Abstract: Described is an arrangement including a receiver (605) and an enveloped detection arrangement (540) . The receiver receives radio frequency signals generated according to a predetermined wireless communication protocol . The envelope detection arrangement screens the radio frequency signals for a predetermined signal which utilizes the predetermined wireless communication protocol and has a predetermined envelope sequence. Upon detection of the predetermined signal, the arrangement transmits a further signal to a computing device (600) coupled thereto. The further signal is an instruction for the computing device to wake up.

    SECTORIZED WIRELESS COMMUNICATION NETWORK OPERATING UNDER 802.11 SPECIFICATIONS
    23.
    发明专利
    SECTORIZED WIRELESS COMMUNICATION NETWORK OPERATING UNDER 802.11 SPECIFICATIONS 未知

    公开(公告)号：CA2599012A1

    公开(公告)日：2006-09-08

    申请号：CA2599012

    申请日：2006-02-28

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： SHARONY JACOB ,  WILLINS BRUCE A

    IPC: H04L12/56 ,  H04W16/24 ,  H04W84/12 ,  H04W88/08

    Abstract: Methods and systems are provided to facilitate communication with a plurality of remote units in a communication area that includes a plurality of spatial sectors. The system includes a network controller configured to receive and transmit under IEEE 802.11 specifications, and a plurality of directional antennas coupled to the network base station. Each of directional antennas functions as an access point for a respective spatial sector. The directional antennas and the network controller are combined as a single base station apparatus in an exemplary embodiment. Further, an exemplary network controller is configured to concurrently transmit a plurality of the data frames to more than one of the spatial sectors, and to synchronize the transmissions in a manner whereby all of the concurrently transmitted frames end simultaneously.

    Method and apparatus for aggregation reconciliation through hierarchical tag checksums
    24.
    发明专利
    Method and apparatus for aggregation reconciliation through hierarchical tag checksums 未知

    公开(公告)号：AU2004312760A1

    公开(公告)日：2005-07-21

    申请号：AU2004312760

    申请日：2004-11-30

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： WILLINS BRUCE A

    IPC: G06K7/00 ,  G06K17/00

    Abstract: A hierarchical system of tag associations reduces latency and bandwidth consumption in an RFID or other environment. A method of electronically tracking a items (such as retail goods) stored in a container includes the broad steps of obtaining the electronic identifier for each of the items, computing a checksum or alternative high entropy data structure as a function of each of the electronic identifiers, and transmitting the checksum or data structure to the container for storage at the container. The stored data structure can be compared against a subsequently-calculated checksum to identify any changes to the items stored in the container.

    Sectorized wireless communication network operating under 802.11 specifications
    28.
    发明专利
    Sectorized wireless communication network operating under 802.11 specifications 未知

    公开(公告)号：AU2006218786A1

    公开(公告)日：2006-09-08

    申请号：AU2006218786

    申请日：2006-02-28

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： WILLINS BRUCE A ,  SHARONY JACOB

    IPC: H04L12/56 ,  H04W16/24 ,  H04W84/12 ,  H04W88/08

    Abstract: Methods and systems are provided to facilitate communication with a plurality of remote units in a communication area that includes a plurality of spatial sectors. The system includes a network controller configured to receive and transmit under IEEE 802.11 specifications, and a plurality of directional antennas coupled to the network base station. Each of directional antennas functions as an access point for a respective spatial sector. The directional antennas and the network controller are combined as a single base station apparatus in an exemplary embodiment. Further, an exemplary network controller is configured to concurrently transmit a plurality of the data frames to more than one of the spatial sectors, and to synchronize the transmissions in a manner whereby all of the concurrently transmitted frames end simultaneously.

    System and method for detection using ultrasonic waves
    29.
    发明专利
    System and method for detection using ultrasonic waves 未知

    公开(公告)号：AU2005262595A1

    公开(公告)日：2006-01-19

    申请号：AU2005262595

    申请日：2005-06-01

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： VOLLKOMMER RICHARD M ,  WILLINS BRUCE A

    IPC: G01S3/80 ,  G01S15/00 ,  G06Q10/00

    Abstract: Described is a system and method for detection using an ultrasonic wave. The system may include a first arrangement and a second arrangement. The first arrangement may include a transmitter and a receiver. The transmitter transmits an ultrasonic wave along a surface on which items are to be stored and the receiver receives the wave after it has passed over the surface. The second arrangement receives from the first arrangement data corresponding to properties of the received wave. The second arrangement compares the properties of the received wave to properties of the transmitted wave to generate current condition value. The second arrangement determines based on the current condition value and calibration data a current condition state corresponding to a degree of the surface currently occupied by the items. The calibration data includes at least one calibration value and a corresponding calibration condition state.

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