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公开(公告)号：US20090045921A1
公开(公告)日：2009-02-19
申请号：US11893679
申请日：2007-08-16
IPC分类号： H04Q5/22
CPC分类号： G06K7/0008 , G06K7/10297
摘要： A system and method for communicating with contactless IC cards of multiple protocols includes transmitting an IC card polling signal and receiving a data transmission from an IC card. A processor is configured to determine whether or not a data transmission is received in response to the polling signal. The processor is configured to decode the data transmission in real-time if it is received in response to the polling signal. The processor is otherwise configured to first store the received data transmission in a memory and then decode the stored data transmission.
摘要翻译： 用于与多个协议的非接触IC卡通信的系统和方法包括发送IC卡轮询信号并从IC卡接收数据传输。 处理器被配置为确定响应于轮询信号是否接收到数据传输。 处理器被配置为如果响应于轮询信号而被接收则实时地解码数据传输。 处理器被配置为首先将接收到的数据传输存储在存储器中，然后对存储的数据传输进行解码。
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公开(公告)号：US08830035B2
公开(公告)日：2014-09-09
申请号：US11174358
申请日：2005-06-30
CPC分类号： G06K7/0008 , G06K7/10128
摘要： Power consumption management for a radio frequency identification (RFID) reader for a radio frequency (RF) transponder system. The RF system includes an RFID device and a host. The RFID reader includes an RFID controller, an excitation signal transmitter, a response signal receiver, an optional RFID device detector, a host interface input/output, and a user interface. The method includes establishing a first power consumption level for the RFID reader, establishing a second power consumption level that is different from the first, and changing between the first level and the second level. The difference between the first level and the second level is derived from at least one technique for power consumption management. A plurality of techniques are presented. Among the potential benefits to reduced power consumption are increased energy efficiency and reduced radiated emissions. The option of choosing between power consumption levels presents unique opportunities in system design, implementation, and operation.
摘要翻译： 射频（RF）应答器系统的射频识别（RFID）读取器的功耗管理。 RF系统包括RFID设备和主机。 RFID读取器包括RFID控制器，激励信号发射器，响应信号接收器，可选的RFID设备检测器，主机接口输入/输出和用户接口。 该方法包括为RFID读取器建立第一功耗级别，建立与第一功率消耗水平不同的第一功耗水平，以及在第一水平和第二水平之间的变化。 第一级和第二级之间的差异来自用于功耗管理的至少一种技术。 提出了多种技术。 减少功耗的潜在好处是提高能源效率和减少辐射排放。 在功耗级别之间选择的选择在系统设计，实施和操作中提供了独特的机会。
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公开(公告)号：US5600683A
公开(公告)日：1997-02-04
申请号：US432257
申请日：1995-05-01
申请人： Kirk B. Bierach , Ximing Shi
发明人： Kirk B. Bierach , Ximing Shi
CPC分类号： G06K7/0008
摘要： A new data format used in a communication system employing binary phase shift keying modulation and demodulation is described. The data format provides for a frame comprising a plurality of variable data bits and synchronization bits. The number of variable data bits in the data format of the present invention is more than the number of synchronization bits. The data format preferably includes a CRC field for error detection. In order to uniquely decode the information contained in the frame, the inverse of frame should not be a valid frame. A method for detecting invalid frames is also disclosed.
摘要翻译： 描述了在采用二进制相移键控调制和解调的通信系统中使用的新数据格式。 数据格式提供包括多个可变数据位和同步位的帧。 本发明的数据格式的可变数据位的数量大于同步位数。 数据格式优选地包括用于错误检测的CRC字段。 为了对包含在帧中的信息进行唯一解码，帧的倒数不应该是有效的帧。 还公开了一种用于检测无效帧的方法。
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公开(公告)号：US08411764B2
公开(公告)日：2013-04-02
申请号：US11893679
申请日：2007-08-16
IPC分类号： H04Q5/22
CPC分类号： G06K7/0008 , G06K7/10297
摘要： A system and method for communicating with contactless IC cards of multiple protocols includes transmitting an IC card polling signal and receiving a data transmission from an IC card. A processor is configured to determine whether or not a data transmission is received in response to the polling signal. The processor is configured to decode the data transmission in real-time if it is received in response to the polling signal. The processor is otherwise configured to first store the received data transmission in a memory and then decode the stored data transmission.
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公开(公告)号：US20090153290A1
公开(公告)日：2009-06-18
申请号：US12002145
申请日：2007-12-14
申请人： Kirk B. Bierach
发明人： Kirk B. Bierach
IPC分类号： H04L9/32
CPC分类号： H04L9/32 , H04L2209/805
摘要： An access control system and methods utilizing secure Wiegand communication interface are disclosed. In one example embodiment, an access control system includes an a plurality of RFID cards, a RFID reader and an access controller. The RFID reader collects user identification information communicated thereto via RFID cards and forwards it to the remote access controller. The access controller process the received identification information and determines whether to grant RFID card holder access to a restricted area or service. The RFID reader communicates with the access controller via a secure Wiegand interfaces, which utilized RFID reader identifiers, message sequence numbers and data encryption techniques to secure data transmissions between the RFID reader and access controller from various types of attacks.
摘要翻译： 公开了一种使用安全Wiegand通信接口的访问控制系统和方法。 在一个示例实施例中，访问控制系统包括多个RFID卡，RFID读取器和访问控制器。 RFID读取器通过RFID卡收集与其通信的用户识别信息，并将其转发给远程访问控制器。 访问控制器处理所接收的识别信息，并确定是否授予RFID卡持有人访问受限制的区域或服务。 RFID读取器通过安全的Wiegand接口与访问控制器进行通信，其使用RFID读取器标识符，消息序列号和数据加密技术来保护RFID读取器和访问控制器之间的数据传输从各种类型的攻击。
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公开(公告)号：US07245222B2
公开(公告)日：2007-07-17
申请号：US11041078
申请日：2005-01-14
申请人： Kirk B. Bierach
发明人： Kirk B. Bierach
IPC分类号： G08B13/14
CPC分类号： G06K7/10128 , G06K7/0008 , H04B5/0037 , H04B5/0062 , H04B5/0068 , H04B5/0075 , H04W52/0225 , Y02D70/166 , Y02D70/42
摘要： A method and apparatus for controlling a radio frequency identification (RFID) reader to detect the proximity of an RFID device based on observing a change in effective inductance. The RFID reader includes an excitation signal generator and a resonant filter that combined are capable of generating and transmitting a detection signal, an RFID device detector for measuring a detector parameter indicative of the change in effective inductance, and a detection signal receiver for determining whether an RFID device is present. The method includes awakening from a detection sleep state at a preselected time, generating and transmitting a detection signal, measuring at least one detector parameter indicative of the change in effective inductance, and determining whether the RFID device is present. When the RFID device is not present, the method returns to the detection sleep state and, when the RFID device is present, the method exits the detection sleep state.
摘要翻译： 一种用于控制射频识别（RFID）读取器的方法和装置，用于基于观察有效电感的变化来检测RFID装置的接近度。 RFID读取器包括激励信号发生器和组合的能够产生和发送检测信号的谐振滤波器，用于测量表示有效电感的变化的检测器参数的RFID器件检测器，以及用于确定是否存在检测信号的检测信号接收器 存在RFID设备。 该方法包括在预先选择的时间从检测睡眠状态唤醒，生成和发送检测信号，测量表示有效电感的变化的至少一个检测器参数，以及确定RFID设备是否存在。 当RFID设备不存在时，该方法返回到检测睡眠状态，并且当存在RFID设备时，该方法退出检测睡眠状态。
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