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    • 3. 发明申请
    • METHOD AND APPARATUS FOR COMMUNICATION BETWEEN READERS HAVING DUAL SENSITIVITY MODES
    • 具有双灵敏度模式的读者之间的通信方法和装置
    • US20090058613A1
    • 2009-03-05
    • US12059760
    • 2008-03-31
    • Byounghyun CHUNGHee Sook MONae-Soo KIMCheol Sig PYO
    • Byounghyun CHUNGHee Sook MONae-Soo KIMCheol Sig PYO
    • H04Q5/22
    • H04Q9/00H04Q2209/47
    • Provided is a method for communication with between readers having dual sensitivity modes for avoiding conflict between readers arising from interference each other when simultaneously used in a limited space. The method for communication between a tag and a reader using dual sensitivity modes for avoiding conflict between the reader and the tag includes: initializing the reader to a normal sensitivity mode; temporarily selecting a frequency channel by the reader; checking whether or not a different reader uses the selected frequency channel; repeatedly selecting another frequency channel if the other readers occupy the selected frequency channel; switching to a reduced sensitivity mode if the other readers do not occupy the selected frequency channel; and communicating with the tag by the reader in the reduced sensitivity mode.
    • 提供了一种用于在具有双重灵敏度模式的读取器之间进行通信的方法,用于在同时在有限空间中同时使用时避免彼此干扰而引起的读取器之间的冲突。 使用双灵敏度模式的标签和读取器之间的通信方法用于避免读取器和标签之间的冲突,包括:将读取器初始化为正常灵敏度模式; 由读者临时选择频道; 检查不同的读取器是否使用所选择的频道; 如果其他读取器占用所选择的频道,则重复选择另一个频道; 如果其他读取器不占用所选择的频道,则切换到灵敏度降低模式; 并以读取器以降低的灵敏度模式与标签通信。
    • 10. 发明申请
    • PASSIVE RFID READER AND OPERATION CONTROL METHOD THEREFOR
    • 被动RFID阅读器及其操作控制方法
    • US20080122581A1
    • 2008-05-29
    • US11746306
    • 2007-05-09
    • Ji-Hoon BAEHee-Sook MODong-Han LEECheng-Hao QUANChan-Won PARKGil-Young CHOICheol-Sig PYOJong-Suk CHAE
    • Ji-Hoon BAEHee-Sook MODong-Han LEECheng-Hao QUANChan-Won PARKGil-Young CHOICheol-Sig PYOJong-Suk CHAE
    • H04Q5/22
    • G06K7/0008G06K7/10356H04W74/08
    • Provided is a Radio Frequency Identification (RFID) reader that can minimize collision among RFID readers in an environment where there are a plurality of RFID readers within a limited operating environment by making each RFID reader select a channel at different delay time based on a random value, and a method for controlling operation of the RFID reader. The RFID reader includes a random value generating unit; a reader control unit for adaptively deciding a counter value for generating the random value; an anti-collision unit for preventing collision among a plurality of tags; a reader transmitting unit for generating a reader command message determined by the anti-collision unit, encoding the reader command message, and modulating the reader command message; a reader receiving unit for demodulating and decoding a tag signal; and a channel operation control unit for selecting a channel to be used for the communication with the tag.
    • 提供了一种射频识别(RFID)读取器,其可以在有限操作环境中存在多个RFID读取器的环境中最小化RFID读取器之间的冲突,使得每个RFID读取器基于随机值在不同的延迟时间选择信道 以及用于控制RFID读取器的操作的方法。 RFID读取器包括随机值生成单元; 读取器控制单元,用于自适应地确定用于生成随机值的计数器值; 用于防止多个标签之间的碰撞的防碰撞单元; 读取器发送单元,用于生成由反冲突单元确定的读取器命令消息,对读取器命令消息进行编码,以及调制读取器命令消息; 读取器接收单元,用于解调和解码标签信号; 以及频道操作控制单元,用于选择要用于与标签进行通信的频道。