Method and system for transmission power reduction in RFID interrogators
    1.
    发明申请
    Method and system for transmission power reduction in RFID interrogators 审中-公开
    RFID读写器传输功率降低的方法和系统

    公开(公告)号:US20080111661A1

    公开(公告)日:2008-05-15

    申请号:US11599387

    申请日:2006-11-15

    IPC分类号: H04Q5/22

    摘要: Methods, systems, and apparatuses for reading tags of tag populations are described. Rather than interrogating a tag population in a single query round, interrogations of tag populations are performed using reduced transmit power levels over multiple query rounds, each query round reading a portion of the tag population. In this manner, an overall power amount expended to transmit interrogations signals is reduced, while maintaining a substantially similar read rate as in single query round interrogations.

    摘要翻译: 描述了用于读取标签种群标签的方法,系统和装置。 不是在单个查询循环中询问标签群体,而是使用多个查询轮次的减少的发送功率级别来执行标签群的询问,每个轮询读取标签群的一部分。 以这种方式,减少了用于发送询问信号的总功率量,同时保持与单查询循环询问中相似的读取速率。

    Method, System and Apparatus for Writing Common Information to a Plurality of Radio Frequency Identification (RFID) Tags
    2.
    发明申请
    Method, System and Apparatus for Writing Common Information to a Plurality of Radio Frequency Identification (RFID) Tags 审中-公开
    用于将公共信息写入多个射频识别(RFID)标签的方法,系统和装置

    公开(公告)号:US20090033493A1

    公开(公告)日:2009-02-05

    申请号:US11831167

    申请日:2007-07-31

    IPC分类号: G08B13/14

    CPC分类号: G06K7/0008

    摘要: RFID methods, systems and apparatus for writing common data (RFID information) to a plurality of RFID tags, include transmitting a common-write data signal including the common data to a plurality of RFID tags located in a broadcast field, where the plurality of RFID tags receive and respectively write the common data in internal memory of the plurality of RFID tags in accordance with a common algorithm. A common-write data signal may include common identifier data. Each of a plurality of RFID tags may generate common identifier data by controlling a random number generator of the tag. Each of a plurality of RFID tags may be pre-configured (initialized) for receiving common data and writing the common data to memory in accordance with a common algorithm. Each of a reader and a plurality of RFID tags may include common algorithm for transmitting/receiving and executing a common-write-enable command that enables a common write capability of a tag (e.g., initializes a tag for receiving a common-write data signal), and for transmitting/receiving a common-write-disable command that disables common-write capability of a tag.

    摘要翻译: 用于向多个RFID标签写入通用数据(RFID信息)的RFID方法,系统和装置包括将包含公共数据的共同写入数据信号发送到位于广播场中的多个RFID标签,其中多个RFID 标签根据公共算法接收并分别将公共数据写入多个RFID标签的内部存储器中。 公共写入数据信号可以包括公共标识符数据。 多个RFID标签中的每一个可以通过控制标签的随机数生成器来生成公共标识符数据。 可以预先配置(初始化)多个RFID标签中的每一个用于接收公共数据,并根据公共算法将公共数据写入存储器。 读取器和多个RFID标签中的每一个可以包括用于发送/接收和执行共同写入使能命令的公共算法,该命令实现标签的公共写入能力(例如,初始化用于接收公共写入数据信号的标签 ),并且用于发送/接收禁用标签的共同写入能力的公共写入禁止命令。

    Association based locationing for RFID
    3.
    发明授权
    Association based locationing for RFID 有权
    基于协会的RFID定位

    公开(公告)号:US08456306B2

    公开(公告)日:2013-06-04

    申请号:US12336730

    申请日:2008-12-17

    IPC分类号: G08B13/14

    CPC分类号: G06K7/10356

    摘要: An apparatus, system and techniques for determining a location of an RFID tag among a population of tags are disclosed. The system includes an RFID reader with at least one antenna port and a population of RFID tags. The population of tags can be homogenous or heterogeneous. The RFID reader varies its transmit power through one or more antenna ports resulting in a grouping of the RFID tags into clusters. In one embodiment, the reader utilizes multiple antennas to further define RFID tag clusters among the population. Each read tag is then uniquely associated with a defined cluster. Tag agents also can be provided among the population of tags facilitating definition of the clusters.

    摘要翻译: 公开了一种用于在标签群体中确定RFID标签的位置的装置,系统和技术。 该系统包括具有至少一个天线端口和大量RFID标签的RFID读取器。 标签的群体可以是同质的或异质的。 RFID读取器通过一个或多个天线端口改变其发射功率,导致将RFID标签分组成簇。 在一个实施例中,读取器利用多个天线来进一步在群体中定义RFID标签簇。 然后,每个读取标签与定义的集群唯一相关联。 也可以在促进群集定义的标签群中提供标签代理。

    Dynamic adaptive modulation negotiation for point-to-point terrestrial links
    4.
    发明授权
    Dynamic adaptive modulation negotiation for point-to-point terrestrial links 失效
    点对点地面链路的动态自适应调制协商

    公开(公告)号:US06330278B1

    公开(公告)日:2001-12-11

    申请号:US09362043

    申请日:1999-07-28

    IPC分类号: H04B138

    摘要: A transmission device that transmits a signal along a link and method therefor that includes a forward error correction encoder unit to insert error correction information into the signal transmitted along a link and output a corresponding encoded signal. A modulation unit variably modulates the encoded signal and outputs a modulated signal, having a corresponding quadrature amplitude modulation index, to the receiving device. A control unit variably controls the inserted forward error correction information and the quadrature amplitude modulation index based on link quality information with respect to substantially the entire link to increase throughput during periods of reduced environmental degradation.

    摘要翻译: 沿着链路发送信号的传输装置及其方法包括前向纠错编码器单元,以将纠错信息插入到沿链路传送的信号中并输出对应的编码信号。 调制单元可变地调制编码信号,并将具有对应的正交幅度调制指数的调制信号输出到接收装置。 控制单元基于基本上整个链路的链路质量信息可变地控制所插入的前向纠错信息和正交幅度调制指数,以在减少的环境恶化期间增加吞吐量。

    Token passing protocol for RFID systems
    5.
    发明授权
    Token passing protocol for RFID systems 有权
    RFID系统令牌通过协议

    公开(公告)号:US07714697B2

    公开(公告)日:2010-05-11

    申请号:US11393824

    申请日:2006-03-31

    IPC分类号: H04Q5/22

    CPC分类号: H04W74/00

    摘要: Methods, systems and apparatuses for RFID readers forming a reader network are described. In an aspect of the present invention, a plurality of RFID readers are configured to interrogate tags. Furthermore, the readers are configured to communicate with one another by transferring a token, represented by a signal. Possession of the token enables the reader to access a RF communications medium. Readers can be arranged in a ring configuration, and interconnected via wired links. A secondary token may circulate in the ring in addition to the primary token, to ensure redundancy in the system. A reader waits for a predetermined time interval before accessing the RF communications medium.

    摘要翻译: 描述了形成读取器网络的RFID阅读器的方法,系统和装置。 在本发明的一个方面,多个RFID阅读器配置成询问标签。 此外,读取器被配置为通过传送由信号表示的令牌来彼此通信。 拥有令牌使读者能够访问RF通信介质。 读者可以安排在环形配置中,并通过有线链接进行互连。 除了主令牌之外,辅助令牌可能在环中循环,以确保系统中的冗余。 读卡器在访问RF通信介质之前等待预定的时间间隔。