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1. 发明申请

WO2004038644A2 OPTIMIZATION OF A BINARY TREE TRAVERSAL WITH SECURE COMMUNICATIONS 审中-公开
标题翻译：用安全通信优化二进制TREVERSAL
公开(公告)号：WO2004038644A2
公开(公告)日：2004-05-06
申请号：PCT/US2003/034036
申请日：2003-10-27
申请人： MATRICS, INC. , POWELL, Kevin, J. , SHANKS, Wayne, E. , BANDY, William, R.
发明人： POWELL, Kevin, J. , SHANKS, Wayne, E. , BANDY, William, R.
IPC分类号： G06K
CPC分类号： G06K7/10049 , G06K7/0008
摘要： Methods and systems for the negotiation of a population of RFID tags with improved security is provided. In one aspect, a binary traversal is performed to singulate tags without using information that directly identifies the tags in the tag population. A key is generated to identify each RFID tag of the population of RFID tags. The generated key does not include bits identifying an item with which the particular RFID tag is associated. A binary tree algorithm is operated to identify one or more tags in the population of RFIDs tags using the generated keys. In another aspect, frequency hopping and/or spread spectrum techniques are used to provide improved security while negotiating tags. In another aspect, the reader causes the tags to scroll series of bits back to the reader for each bit sent to the tags to provide improved security.
摘要翻译：提供了用于协商具有改进的安全性的RFID标签群体的方法和系统。在一个方面，执行二进制遍历以分割标签，而不使用直接标识标签群体中的标签的信息。产生一个钥匙来识别RFID标签群体的每个RFID标签。生成的密钥不包括识别特定RFID标签与之相关联的项目的位。操作二进制树算法以使用所生成的密钥来识别RFID标签群中的一个或多个标签。在另一方面，跳频和/或扩频技术用于在协商标签时提供改进的安全性。在另一方面，读取器使得标签将发送到标签的每个比特的一系列比特回滚到读取器以提供改进的安全性。

2. 发明申请

WO2004036482A2 SYSTEM AND METHOD FOR MINIMIZING UNWANTED RE-NEGOTIATION OF A PASSIVE RFID TAG 审中-公开
标题翻译：用于最小化被动无线RFID标签重新认证的系统和方法
公开(公告)号：WO2004036482A2
公开(公告)日：2004-04-29
申请号：PCT/US2003/033041
申请日：2003-10-20
申请人： MATRICS, INC. , POWELL, Kevin, J. , SHANKS, Wayne, E. , BANDY, William, R.
发明人： POWELL, Kevin, J. , SHANKS, Wayne, E. , BANDY, William, R.
IPC分类号： G06K
CPC分类号： G06K7/10039 , G06K7/0008 , G06K7/10356
摘要： A system and method is provided for minimizing the unwanted re-negotiation of passive RFID tags. Each tag stores a confirmed read flag to indicate whether the tag has been previously read. During subsequent interrogations of the tag population, the reader has the capability to address all tags in a tag population or to address only unread tags. When addressing all tags, the reader sends a symbol causing all tags to ignore their confirmed read flag value. Each tag may also clear its confirmed read flag when this symbol is received. When addressing only unread tags, the reader sends a symbol causing each tag to evaluate its confirmed read flag value. Those tags that have a confirmed read flag value indicating "read" will enter dormant state and will not be re-negotiated. Those tags that have a confirmed read flag value indicating "not read" will continue to communicate with the reader.
摘要翻译：提供了一种用于最小化无源RFID标签的不需要的重新协商的系统和方法。每个标签存储确认的读取标志，以指示标签是否已经被读取。在标签群随后的询问期间，读者能够处理标签群中的所有标签，或仅寻址未读标签。当寻址所有标签时，读取器发送一个符号，导致所有标签忽略其确认的读取标志值。当接收到该符号时，每个标签也可以清除其确认的读取标志。当仅寻址未读标签时，读取器发送一个符号，导致每个标签评估其确认的读取标志值。具有指示“读取”的确认的读取标志值的那些标签将进入休眠状态并且将不被重新协商。具有指示“未读取”的确认的读取标志值的那些标签将继续与读取器通信。

3. 发明申请

WO2004036771A3 METHOD FOR THE EFFICIENT READING OF A POPULATION OF RADIO FREQUENCY IDENTIFICATION TAGS WITH UNIQUE IDENTIFICATION NUMBERS OVER A NOISY AIR CHANNEL 审中-公开
公开(公告)号：WO2004036771A3
公开(公告)日：2004-04-29
申请号：PCT/US2003/033043
申请日：2003-10-20
申请人： MATRICS, INC. , SHANKS, Wayne, E. , ARNOLD, Jens
发明人： SHANKS, Wayne, E. , ARNOLD, Jens
IPC分类号： H04Q5/22
摘要： A method for reading and tracking radio frequency identification (RFID) tags (112) in the presence of a noisy air channel is provided. In accordance with the method, a binary tree data structure is used to characterize a plurality of RFID tags (102a-102g), each of which is associated with a unique identification (ID) number. During communication between a tag reader (104) and one or more RFID tags (102a-102g), the tag reader (104) traverses the binary tree (3), eliminating tags from communication until one tag with a unique ID number is isolated and verified. As the binary tree is traversed, counters (260 and 265)associated with each node in the tree are incremented based on tag matches, such that, over time, counters associated with nodes in tag-populated branches will tend to have a high value and counters associated with nodes in unpopulated tree branches will tend to have low values. Where the read process is subject to noise and the tag reader is forced to make a decision at a branching node, the tag reader makes a branch prediction based on the current value of the node counters associated with each of the possible alternative branches.

4. 发明申请

WO2010014435A1 SELF TUNING RFID 审中-公开
标题翻译：自调谐RFID
公开(公告)号：WO2010014435A1
公开(公告)日：2010-02-04
申请号：PCT/US2009/050940
申请日：2009-07-17
申请人： SYMBOL TECHNOLOGIES, INC. , SHANKS, Wayne, E.
发明人： SHANKS, Wayne, E.
IPC分类号： G06K19/077 , G06K7/00
CPC分类号： G06K19/07749 , G06K7/0008 , G06K19/0713
摘要： The antenna of an RFID tag is automatically tuned by controlling both the real and imaginary components impedance "seen" by the antenna. The real component (resistive) is controlled by controlling a tap of a charge pump circuit of the tag. The imaginary (reactive) component is controlled by connecting one or more reactive elements of an antenna tuning circuit to the antenna. The real component is controlled by a first digital control loop that automatically activates successive taps on a charge pump of the RFID tag which effectively controls the resistance seen by the antenna. A second digital control loop controls the connection of the various reactive components.
摘要翻译： RFID标签的天线通过控制由天线“看到”的实部和虚部分阻抗来自动调谐。通过控制标签的电荷泵电路的抽头来控制实际分量（电阻）。通过将天线调谐电路的一个或多个无功元件连接到天线来控制虚拟（无功）分量。实际部件由第一数字控制回路控制，自动激活RFID标签的电荷泵上的连续抽头，这有效地控制了天线所看到的电阻。第二个数字控制回路控制各种无功元件的连接。

5. 发明申请

WO2006012358A2 SYSTEMS AND METHODS FOR TESTING RADIO FREQUENCY IDENTIFICATION TAGS 审中-公开
标题翻译：用于测试无线电频率识别标签的系统和方法
公开(公告)号：WO2006012358A2
公开(公告)日：2006-02-02
申请号：PCT/US2005/022876
申请日：2005-06-29
申请人： SYMBOL TECHNOLOGIES, INC. , SHANKS, Wayne, E.
发明人： SHANKS, Wayne, E.
IPC分类号： G01R31/302 , G01M19/00 , H04Q5/22
CPC分类号： G01R31/303 , G01R31/3025 , G06K7/0095 , G06K7/10019 , G06K17/00
摘要： Methods and systems for testing tags in volume are described. According to a first embodiment, an array of radiation sources is present. Each radiation source in the array corresponds to a tag in a plurality of tags. A plurality of radiation sources in the array controllably emit radiation to their corresponding tag to inhibit operation of an integrated circuit of their corresponding tag. A first radiation source in the array does not emit radiation to its corresponding tag. The tag corresponding to the first radiation source is tested. In a second embodiment, an array of blocking elements is present. Each blocking element in the array corresponds to a tag in a plurality of tags. The blocking elements in the array controllably inhibit radiation from being incident upon corresponding tags. A first blocking element in the array inhibits radiation from being incident upon its corresponding tag. The tag corresponding to the first blocking element is tested.
摘要翻译：描述了用于测试体积中的标签的方法和系统。根据第一实施例，存在辐射源阵列。阵列中的每个辐射源对应于多个标签中的标签。阵列中的多个辐射源可控制地将辐射发射到其对应的标签，以禁止其相应标签的集成电路的操作。阵列中的第一辐射源不向其相应的标签发射辐射。测试对应于第一辐射源的标签。在第二实施例中，存在阻塞元件的阵列。阵列中的每个阻塞元素对应于多个标签中的标签。阵列中的阻挡元件可控制地抑制辐射入射到相应的标签上。阵列中的第一个阻挡元件禁止辐射入射到其相应的标签上。测试与第一个阻塞元件对应的标签。

6. 发明申请

WO2002065380A3 RADIO FREQUENCY IDENTIFICATION ARCHITECTURE 审中-公开
公开(公告)号：WO2002065380A3
公开(公告)日：2002-08-22
申请号：PCT/US2002/003989
申请日：2002-02-12
申请人： MATRICS, INC. , CYMETECH , LLC
发明人： ARNESON, Michael, R. , BANDY, William, R. , POWELL, Kevin, J. , SHANKS, Wayne, E.
IPC分类号： G06K7/00
摘要： A radio frequency identification (RFID) architecture is described. RFID tags are interrogated by a reader, which may be located in a network of readers. The reader transmits symbols to the tags. Tags respond to the interrogations with symbols that each represent one or more bits of data. An RFID tag includes an antenna pad, a receiver, a state machine, a charge pump, and a modulator. The receiver is coupled to the antenna pad. The receiver receives a symbol from the antenna pad and outputs a received signal. The state machine is configured to determine a response symbol from the received signal and an operating state of the tag. The modulator is coupled to the antenna pad. The modulator is configured to backscatter modulate the received symbol with the response symbol. The modulator is configured to output the backscatter modulated symbol to the antenna pad. The charge pump is configured to convert a received high frequency signal to a substantially direct current (DC) voltage.

7. 发明申请

WO2002065380A2 RADIO FREQUENCY IDENTIFICATION ARCHITECTURE 审中-公开
标题翻译：无线电频率识别架构
公开(公告)号：WO2002065380A2
公开(公告)日：2002-08-22
申请号：PCT/US2002/003989
申请日：2002-02-12
申请人： MATRICS, INC.
发明人： ARNESON, Michael, R. , BANDY, William, R. , POWELL, Kevin, J. , SHANKS, Wayne, E.
IPC分类号： G06K9/00
CPC分类号： G06K19/07749 , G06K7/0008 , G06K7/10039 , G06K7/10069 , G06K7/10108 , G06K7/10356 , G06K17/00 , G06K19/0713 , G06K19/0723 , G06K19/07767 , G08B13/2485 , G11C5/142 , H04L7/0331
摘要： A radio frequency identification (RFID) architecture is described. RFID tags are interrogated by a reader, which may be located in a network of readers. The reader transmits symbols to the tags. Tags respond to the interrogations with symbols that each represent one or more bits of data. An RFID tag includes an antenna pad, a receiver, a state machine, a charge pump, and a modulator. The receiver is coupled to the antenna pad. The receiver receives a symbol from the antenna pad and outputs a received signal. The state machine is configured to determine a response symbol from the received signal and an operating state of the tag. The modulator is coupled to the antenna pad. The modulator is configured to backscatter modulate the received symbol with the response symbol. The modulator is configured to output the backscatter modulated symbol to the antenna pad. The charge pump is configured to convert a received high frequency signal to a substantially direct current (DC) voltage.
摘要翻译：描述射频识别（RFID）架构。 RFID标签被读取器询问，读取器可以位于读取器网络中。读卡器将符号发送到标签。标签响应具有每个表示一个或多个数据位的符号的询问。 RFID标签包括天线垫，接收器，状态机，电荷泵和调制器。接收器耦合到天线焊盘。接收机从天线焊盘接收符号并输出接收信号。状态机被配置为从接收到的信号和标签的操作状态确定响应符号。调制器耦合到天线垫。调制器被配置为使用响应符号对所接收的符号进行后向散射调制。调制器被配置为将后向散射调制符号输出到天线焊盘。电荷泵被配置为将接收到的高频信号转换成基本上直流（DC）的电压。

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