Method and apparatus for improving the efficiency and accuracy of RFID systems
    1.
    发明申请
    Method and apparatus for improving the efficiency and accuracy of RFID systems 有权
    提高RFID系统效率和精度的方法和装置

    公开(公告)号:US20050212660A1

    公开(公告)日:2005-09-29

    申请号:US11066048

    申请日:2005-02-25

    摘要: The present invention relates to a method and apparatus for transmitting a narrow signal beam that allows the precise location of RFID tags to be determined and reduces tag collisions. The present invention further relates to a method and apparatus for combing an RFID reader with an optical source to visualize the interrogation zone of the reader. The present invention also relates to a method and apparatus for improving the efficiency of RFID systems.

    摘要翻译: 本发明涉及一种用于发送窄信号光束的方法和装置,其允许确定RFID标签的精确定位并减少标签冲突。 本发明还涉及一种用于将RFID读取器与光源组合以使读取器的询问区域可视化的方法和装置。 本发明还涉及一种提高RFID系统效率的方法和装置。

    METHOD AND APPARATUS FOR IMPROVING THE EFFICIENCY AND ACCURACY OF RFID SYSTEMS
    3.
    发明申请
    METHOD AND APPARATUS FOR IMPROVING THE EFFICIENCY AND ACCURACY OF RFID SYSTEMS 审中-公开
    提高RFID系统效率和准确度的方法和装置

    公开(公告)号:US20070252687A1

    公开(公告)日:2007-11-01

    申请号:US11758086

    申请日:2007-06-05

    IPC分类号: G08B29/20

    摘要: The present invention relates to a method and apparatus for transmitting a narrow signal beam that allows the precise location of RFID tags to be determined and reduces tag collisions. The present invention further relates to a method and apparatus for combing an RFID reader with an optical source to visualize the interrogation zone of the reader. The present invention also relates to a method and apparatus for improving the efficiency of RFID systems.

    摘要翻译: 本发明涉及一种用于发送窄信号光束的方法和装置,其允许确定RFID标签的精确定位并减少标签冲突。 本发明还涉及一种用于将RFID读取器与光源组合以使读取器的询问区域可视化的方法和装置。 本发明还涉及一种提高RFID系统效率的方法和装置。

    Contact tracing solution to combat the spread of infectious diseases using near field communications

    公开(公告)号:US11722175B1

    公开(公告)日:2023-08-08

    申请号:US17367551

    申请日:2021-07-05

    CPC分类号: H04B5/0031

    摘要: This disclosure describes methods for contact tracing using information from devices for near-field communications (NFC), combined with auxiliary information from other (non-NFC) sensors such as inertial motion sensors (accelerometers and gyroscopes) and magnetometers. Methods using low-frequency NFC in the low MHz range of frequencies have the advantage of being robust in the presence of interfering objects, unlike other means of communication and proximity tracking using much higher frequency electromagnetic signals such as Bluetooth, GPS, and laser positioning. The method relies on unique features of NFC using inductively coupled devices to solve an optimization problem yielding the closest distance of approach of two NFC devices and can be adapted to handle multiple pairs of devices simultaneously. Location data is only required and generated in a local coordinate system (independent of absolute locations) which helps to preserve privacy. An individual device that determines the presence of another device within a prescribed distance (e.g., 2 meters or 6 feet) stores a unique identifier of the other device along with a timestamp in its memory in encrypted form and separately uploads this same information securely to a central database. The methods disclosed can also be used for other applications such as gaming where keeping track of contacts between participants in a local coordinate system, while maintaining privacy, is useful.

    METHOD AND APPARATUS FOR SECURITY IN A WIRELESS NETWORK
    10.
    发明申请
    METHOD AND APPARATUS FOR SECURITY IN A WIRELESS NETWORK 有权
    无线网络安全的方法和装置

    公开(公告)号:US20080025432A1

    公开(公告)日:2008-01-31

    申请号:US11779971

    申请日:2007-07-19

    IPC分类号: H04L27/00

    CPC分类号: H04W12/08 H01Q25/02 H04W16/28

    摘要: 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.

    摘要翻译: 本发明涉及一种防止未授权用户获取无线网络的装置和方法。 处理器仅允许来自授权用户的指示的数据传输来访问网络。 来自其他方向的数据传输不允许访问网络。 本发明还涉及仅在选定方向发送信息的方法和装置,而在未选择的方向上,不能从所发送的信号或信号中推断出信息。