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Interrogation signal detail

Subclass of:

340 - Communications: electrical

340825000 - SELECTIVE

340100100 - Interrogation response

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
340100330 Wake up (all call) 27
340100340 Power up 22
340100310 Individual call 14
340100320 Group call 8
Entries
DocumentTitleDate
20100156605WIRELESS DISPLAY TAG (WDT) USING ACTIVE AND BACKSCATTER TRANSCEIVERS - A wireless display tag, adapted to fit within the C-channel of a shelf-edge, or otherwise usable as a hang tag or small identification device, includes, depending on implementation, an active transceiver, a passive transceiver, or both, with analog and digital control portions for managing communications with a host.06-24-2010
20090231107Testing device - A control device that specifies an output level to a reader/writer configured to supply an electrical signal corresponding to a radio signal to a stripline cell for transmitting the radio signal to an RFID tag and that has unique output characteristics. The control device includes a response analyzing section that checks the existence of a reaction in the RFID tag; and a distance calculation processing section that uses the output characteristics of the reader/writer from the output level specified to the reader/writer to obtain an electric field strength of the radio signal received by the RFID tag and that converts the electric field strength to a distance between a predetermined antenna and the RFID tag, the antenna transmitting the radio signal with a predetermined output and the RFID tag receiving the radio signal at a same electric field strength as the electric field strength.09-17-2009
20100060432Battery Assisted Tag and RFID System - Embodiments of the present invention provide for RFID systems that employ a plurality of battery assisted semi-passive and semi-active RFID tags with optimized system operation. The RFID tags feature receivers operating with multiple dynamic range states with square law mode for improved sensitivity, and part time active transmit in the tag to supplement its backscatter transmitter and thus support system operation taking full advantage of the sensitivity of the tag. In certain embodiments of the invention, tag sensitivity and reliability are further enhanced by the use pseudo-random sequence based receiver training and frame synchronizing.03-11-2010
20100148933Inclusive or Exclusive RFID Tag Interrogation and Query Round - Embodiments of the present invention allow for dynamic selection and query of different types of RFID tags into a session. Embodiments of the present invention also allow for dynamic activation of different types of RFID tags. In certain embodiments of the invention, an inclusive operation is performed on the RFID tags and in other embodiments an exclusive operation is performed.06-17-2010
20080258877Secure Self Scan - This invention includes the system and method for the manufacture and use of a hermetically sealed Faraday cage in the retail/consumer goods environment. It is called the “Secure Self Scan” and is constructed using meshed glass, sheet metal and edge level elastomers as agents of containment and reflection. The utility of this invention is that it prevents unauthorized access to communication protocols between RFID tagged consumer items and an RFID interrogator. It also prevents unauthorized access to communication protocols between an RFID interrogator and contact less smart card. This invention takes the mal ware writer and hacker plus the skimmer and eavesdropper out of the RFID equation in relationship to consumer goods, contact less smart cards and consumer privacy. Furthermore, this invention magnifies RFID interrogation signals within the Secure Self Scan unit thereby increasing read rates while concurrently obviating external electro magnetic interference, also known as noise, thereby increasing RFID tag read rates.10-23-2008
20110193686TAG READER, TAG READER CONTROL METHOD, AND TAG READER CONTROL PROGRAM - There has been a problem that it is impossible to ensure the ability to acquire RFID tag state information and at the same time reduce the power consumption necessary therefore. Provided is a tag reader including a read means, which detects the loss of communication with a tag during communication with the tag, and a control means, which counts the number of times communication with the tag is lost on the basis of the losses detected by the read means and disables execution of a communication process with the tag when the number of losses has reached a predetermined threshold value.08-11-2011
20090219142RFID SYSTEM AND METHOD OF TRANSMITTING LARGE DATA OF PASSIVE RFID - Provided are a radio frequency identification (RFID) system including an RFID reading apparatus and a passive RFID tag and a method of transferring and/or processing data using the same. An RFID reading apparatus includes a data input unit which receives data to be transferred to a passive RFID tag, a control unit which generates a transmission packet containing the data and a command directing data transfer, and a communication unit which converts the generated transmission packet into an RF signal and transfers the converted RF signal to the passive RFID tag.09-03-2009
20100079254METHOD OF UPGRADING AN OPERATION PROGRAM OF A RADIO FREQUENCY IDENTIFICATION SYSTEM - A method of upgrading an operation program in an interrogator of a radio frequency identification (RFID) system including the interrogator and a transponder is provided. The method includes transmitting, from the interrogator to the transponder, a first message requesting an operation program upgrade based on information exchanged between the interrogator and the transponder; receiving, at the interrogator from the transponder, a second message that includes a new-version operation program in response to the first message; and installing, at the interrogator, the new-version operation program to upgrade the operation program in the interrogator.04-01-2010
20100073141IC TAG READING DEVICE - On one side of a passageway for an identification subject 03-25-2010
20100073140AUTHENTICATING METHOD AND IDENTIFICATION SYSTEM - An authenticating method includes enabling a transponder to receive a read request that contains an authentication code, enabling the transponder to extract the authentication code from the read request, enabling the transponder to generate and wirelessly transmit a reply signal that contains the authentication code, and enabling a reader to authenticate the transponder based on the authentication code contained in the reply signal. An identification system, which includes the transponder and the reader is also disclosed.03-25-2010
20130076491SYSTEM AND METHOD FOR COMMISSIONING DEVICES - According to an aspect of the invention a system for commissioning devices is provided, which system comprises: a first device and a second device; an RFID tag comprised in the first device; a host processor comprised in the first device; wherein the second device is arranged to generate an electromagnetic field; wherein the RFID tag is arranged to detect the electromagnetic field and to wake up the host processor upon detecting said electromagnetic field in order for the second device to communicate with the host processor. Furthermore, a corresponding method for commissioning devices is provided. Since the RFID tag comprised in the first device is arranged to wake up the host processor, an end-user does not have to switch on the first device manually. Therefore, the user interaction is simplified. Furthermore, there is no need for a separate power button on the first device. The latter reduces cost and simplifies the design of the first device.03-28-2013
20100045442RFID Privacy-Preserving Authentication System and Method - A system and method for RFID privacy-preserving authentication is disclosed. The method first has a reader sending a request and a first random number to a tag. The tag then generates a second random number. A plurality of hash values are then computed at the tag. Each hash value uses the first random number, the second random number and at least one part of a key of the tag as inputs. The second random number and the computed hash values are then sent to the reader. Lastly, the reader identifies a validity of the tag from the received values. The hash values are all generated in parallel and are independent to each other.02-25-2010
20090045923Wireless Communication System - An electronic tag (02-19-2009
20090045922Data collection system having EIR terminal interface node - A network accessible node that facilitates management of a fleet of portable communication devices (EIR terminal), including portable data terminals and/or barcode readers, by directing performance of software upgrade and/or configuration update actions by one or more members of the fleet of EIR terminals.02-19-2009
20110006885RFID INTERROGATOR RETRANSMITTING COMMAND DEPENDING ON COLLISION SITUATION AND CONTROL METHOD THEREOF - As an RFID interrogator transmitting a command depending on a collision situation and a control method thereof, the RFID interrogator includes a collision diagnosis unit that analyzes data of a received signal received during a receive time in correspondence with a transmitted signal from an RF communication unit that can transmit and receive signal to and from one or more tag, verifies whether or not a collision occurs in the received signal, and diagnoses a collision type depending on an analysis result of the data of the received signal; and a collision resolution unit that can retransmit a command to the tag through the RF communication unit depending on the collision situation on the basis of whether or not occurrence of the collision or not and the collision type that are received from the collision diagnosis unit.01-13-2011
20100060433SYSTEMS AND/OR METHODS OF DATA ACQUISITION FROM A TRANSCEIVER - Systems and/or Methods are disclosed for acquiring data from a transceiver responsive to one or more signals that are received at the transceiver from one or more devices. In one embodiment, a transceiver is configured to transmit a signal responsive to having received a first signal from a first device, wherein the signal that is transmitted by the transceiver is configured to trigger a second device to transmit a second signal. The transceiver is further configured to transmit data responsive to having received the second signal that is transmitted by the second device. In other embodiments, a transceiver is configured to receive a signal from a first device over frequencies of a predetermined frequency band that the first device is authorized to use, to receive a signal from a second device over frequencies of the predetermined frequency band and to transmit data responsive to having received both the signal from the first device and the signal from the second device. The transceiver is further configured to require that both the signal from the first device and the signal from the second device be received at the transceiver before the data is transmitted. Analogous methods are also disclosed.03-11-2010
20090267745READER FOR WIRELESS IDENTIFICATION IC TAG AND WIRELESS IDENTIFICATION IC TAG SYSTEM - A reflected electromagnetic wave received, for example, from a wireless identification IC tag through an antenna (10-29-2009
20110012713RFID TAG SENSORS AND METHODS - Radio frequency identification (RFID) devices for use in RFID-based sensors and related methods are described herein. In one implementation, an RFID sensor system includes an RFID device having a near field only RFID tag and a conductive element which functions as a far field antenna. A coupling structure selectively locates the near field only RFID tag and the conductive element in at least a first position and a second position relative to each other; wherein in the first position, the RFID device only operates in a near field, and in the second position, the RFID device operates in both the near field and a far field. The system may also include an RFID reader and controller located within the far field to read the RFID device only when the coupling structure locates the components in the second position.01-20-2011
20090237218WIRELESS COMMUNICATION DEVICE - Embodiments relate to a wireless communication device. The embodiment provides a wireless communication device comprising: a reception signal processor demodulating a received signal; a first signal state detector detecting a reception state of a first signal from the received signal; a second signal state detector detecting a reception state of a second signal from the received signal; a transmission signal processor modulating a transmission signal; and a controller controlling a change of a frequency of a channel transmitted to the transmission signal processor depending on a reception state of at least one of the first signal of the first signal state detector and the second signal of the second signal state detector.09-24-2009
20110279240MULTI-PROTOCOL RFID SYSTEM USING DYNAMIC RECONFIGURATION - A multi-protocol RFID interrogating system employs a synchronization technique (step-lock) for a backscatter RFID system that allows simultaneous operation of closely spaced interrogators. The multi-protocol RFID interrogating system can communicate with backscatter transponders having different output protocols and with active transponders including: Title 21 compliant RFID backscatter transponders; IT2000 RFID backscatter transponders that provide an extended mode capability beyond Title 21; EGOTM RFID backscatter transponders, SEGOTM RFID backscatter transponders; ATA, ISO, ANSI AAR compliant RFID backscatter transponders; and IAG compliant active technology transponders. The system implements a step-lock operation, whereby adjacent interrogators are synchronized to ensure that all downlinks operate within the same time frame and all uplinks operate within the same time frame, to eliminate downlink on uplink interference.11-17-2011
20110279239MULTI-PROTOCOL RFID SYSTEM USING BIT-LOCK OR STEP-LOCK SYNCHRONIZATION - A multi-protocol RFID interrogating system employs a synchronization technique (step-lock) for a backscatter RFID system that allows simultaneous operation of closely spaced interrogators. The multi-protocol RFID interrogating system can communicate with backscatter transponders having different output protocols and with active transponders including: Title 21 compliant RFID backscatter transponders; IT2000 RFID backscatter transponders that provide an extended mode capability beyond Title 21; EGO™ RFID backscatter transponders, SEGO™ RFID backscatter transponders; ATA, ISO, ANSI AAR compliant RFID backscatter transponders; and IAG compliant active technology transponders. The system implements a step-lock operation, whereby adjacent interrogators are synchronized to ensure that all downlinks operate within the same time frame and all uplinks operate within the same time frame, to eliminate downlink on uplink interference.11-17-2011
20100207738STEERABLE PHASE ARRAY ANTENNA RFID TAG LOCATER AND TRACKING SYSTEM AND METHODS - A system for and method of tracking and locating RFID tags, including where at least one steerable phase array antenna may locate the tags associated with items in three dimensions in real time, through the use of a beam steering unit and controller therewith to control the direction of a beam launched by the at least one steerable phase array antenna.08-19-2010
20110298590APPARATUS COMPRISING DISPLAY DRIVING INTEGRATED CIRCUIT AND RADIO-FREQUENCY IDENTIFICATION READER - A display driving integrated circuit operates as both a radio-frequency identification (RFID) reader and a display driver. The display driving integrated circuit operates as the RFID reader by supplying power to an RFID tag, verifying the RFID tag according to communication between the RFID tag and the processor to produce verification data, transferring the verification data from the processor to the RFID tag, and transmitting some of the verification data to the display unit. It operates as a display driver by processing data received from the processor and transferring the processed data to the display unit. The display driving integrated circuit implements functions for the RFID reader and the display unit driver using one or more shared elements selected from a timer, a clock signal generator, a cyclic redundancy check calculator, and a data interface.12-08-2011
20090128300WIRELESS DEVICE WITH AN RFID INTERROGATOR - A wireless device includes an antenna, a radio unit, a signal processing unit, a control unit and a radio frequency identification (RFID) interrogator having a programmable memory. The programmable memory is programmed to interrogate an RFID device located within a discrete range from the RFID interrogator at user-selectable time intervals and to generate an alert upon loss of a return signal to the RFID interrogator when the RFID device is out of the discrete range.05-21-2009
20090167502Device for verifying a location and functionality of a radio-frequency identification (RFID) tag on an item - A Radio-Frequency Identification (RFID) system verifies proper placement and functionality of RFID tags with respect to particular end-use RFID systems at the time the RFID tag is applied to an item but before the item is deployed. A device for verifying a location and functionality of an RFID tag on an item includes an item holder, a power coupling mechanism attached to the item holder, and an RFID reader electrically connected to the power coupling mechanism. The power coupling mechanism creates a near field for transmission of read or write commands from the RFID reader to an RFID tag on an item placed on the item holder to verify the location and functionality of the RFID tag as applied to the item with respect to a near-field coupling mechanism of a particular end-use RFID system. The device may include additional power coupling mechanisms for testing the functionality of the tag.07-02-2009
20100265043AMPLITUDE MODULATOR - A method for amplitude modulating a carrier signal according to one embodiment includes splitting the carrier signal into first and second paths; phase modulating the carrier signal on the first path; phase modulating the carrier signal on the second path; combining the phase modulated carrier signal on the first path with the phase modulated carrier signal on the second path for generating an amplitude modulated output signal; and wherein a first feedback loop couples the amplitude modulated output signal to circuitry for phase modulating the carrier signal on the second path but not to circuitry for phase modulating the carrier signal on the first path, the first feedback loop being for reducing a residual phase variation of the amplitude modulated output signal. Additional systems and methods are also presented.10-21-2010
20090284354Multiplexing Radio Frequency Signals - The present disclosure is directed to a system and method for multiplexing radio frequency signals. In some implementations, a system includes a host coupling module, a plurality of antennas, and a processing module. The host coupling module is configured to receive and transmit RF signals through a wired connection. The plurality of antennas are configured to wirelessly transmit RF signals and receive RF signals from RFID tags. The processing module is configured to selectively switch between the plurality of antennas for communication with the RFID tags using the host coupling module and backscatter at least a portion of the received RF signals through the wired connection to communicate information independent of an internal power supply.11-19-2009
20090189740METHOD AND SYSTEM FOR DETECTING VITAL SIGNS OF LIVING BODIES - Method and system for detecting vital signs of living bodies in particular in visually obstructed areas by means of illuminating the area of interest with interrogating multifrequency electromagnetic signal. The reflected energy is phase demodulated in quadrature separately on every frequency and analyzed on presence of respiration and heartbeat signature, whereby pairs of frequencies with the same relationship of quadrature components are used for ranging. A system for detecting vital sings of living bodies includes a means of generating said interrogating signal, a transmit antenna, a receive antenna, a multichannel quadrature mixer and multichannel FFT analyzer. The quadrature components so obtained can be processed jointly or separately and monitored on a multistrip waterfall diagram or as a multichannel spectrum plot.07-30-2009
20090146792RFID SYSTEMS USING DISTRIBUTED EXCITER NETWORK - RFID systems are disclosed that include at least one RFID receiver system and a distributed exciter architecture. The exciters can be connected via wired and/or wireless connections to the RFID receiver system and the RFID receiver system can control the activation of the exciters to detect the presence of RFID tags within interrogation spaces defined by the exciter topology. In several embodiments, the RFID receiver system performs location estimation to determine the interrogation space in which a specific RFID tag or collection of RFID tags is located. One embodiment of the invention includes an RFID receiver system configured to detect information from RFID tags within a receive coverage area, and a plurality of exciters defining a plurality of interrogation spaces within the receive coverage area of the RFID receiver system. In addition, the RFID receiver system is configured to transmit a control signal that identifies one of the plurality of exciters and includes information indicative of an RFID tag interrogation signal, the plurality of exciters are configured to receive the control signal, and the exciter identified in the control signal is configured to illuminate an interrogation space with the RFID tag interrogation signal.06-11-2009
20080211635Rfid Reader With An Antenna And Method For Operating The Same - An RFID reader (09-04-2008
20090273448Computer With RFID Interrogator - Methods and apparatus, including computer program products, for a computer with a radio frequency identification (RFID) reader. A system includes a processor, a store of codes representing goods and services cross-referenced to supplemental information, a radio frequency identification (RFID) interrogator, an input/output tag (IO), and a memory including a process that matches a received code from the RFID interrogator to a code in the store of codes and to display supplemental information of a good or service on the IO tag.11-05-2009
20090289771RFID Device Using Single Antenna For Multiple Resonant Frequency Ranges - An RFID device utilizing a single antenna for multiple resonant frequency ranges. RFID device that can include an RFID circuit, and a single antenna coupled to the RFID circuit. The antenna can be configured to operate within multiple frequency ranges for communicating with at least one RFID interrogator according to respective protocols associated with each respective frequency range.11-26-2009
20090195362RFID SYSTEM AND METHOD TO MONITOR A SET OF OBJECTS - The present disclosure relates generally to RFID systems and methods. In particular the present disclosure relates to an RFID system and method for insuring the proximity of the members of a set of designated objects.08-06-2009
20090261952READER/WRITER, COMMUNICATION PROCESSING DEVICE, COMMUNICATION PROCESSING METHOD, DATA MANAGEMENT SYSTEM AND COMMUNICATION SYSTEM - A communication processing device includes a control unit for, when receiving an address update request signal including a segment identifier for identifying a segment address of a recording unit from a reader/writer, holding the segment identifier in a RAM, and when receiving a readout request signal including an offset address having the segment as a reference from the reader/writer, transmitting to the reader/writer data recorded in a region specified by an address having the offset address contained in the readout request signal as offset with the segment address identified in the segment identifier as a reference of the regions of the recording unit.10-22-2009
20080238628FREQUENCY SYNTHESIZER AND FREQUENCY SYNTHESIZING METHOD - A frequency synthesizer for providing clock signals with different frequencies for corresponding band transceivers and associated frequency synthesizing method are provided. The frequency synthesizer includes a phase-locked loop module having a single voltage controlled oscillator, a first frequency divider and a second frequency divider. At first, the single voltage controlled oscillator is activated to generate a primary clock signal. The first frequency divider frequency-divides the primary clock signal to generate a first clock signal for a first band transceiver. The first clock signal is further frequency-divided into a second clock signal for a second band transceiver. Therefore, the frequency synthesizer with the single voltage controlled oscillator can generate clock signals covering more than one frequency band.10-02-2008
20100201495RESONANT-CIRCUIT STRUCTURE - The invention is a resonant-circuit structure for enhancing the interrogation range of a radio-frequency identification system. The resonant circuit structure consists of a coil assembly and a capacitor connected in parallel with a resonance frequency equal to the frequency of the interrogating signal of the radio-frequency identification system with which the resonant circuit structure is to operate. The coil assembly and the capacitor are embedded in a structure which provides physical support for the coil assembly and the capacitor and access to a region near the coil assembly.08-12-2010
20080278291Radio-Frequency Tag Communication System - A radio-frequency tag communication system including (a) a radio-frequency tag, (b) a radio-frequency tag communication device configured to transmit a transmitted signal toward the radio-frequency tag, and to receive a reply signal transmitted from the radio-frequency tag in response to the transmitted signal, for thereby effecting radio communication with the radio-frequency tag, and (c) at least one reference tag disposed fixedly in an area of communication of the radio-frequency tag communication system and configured to transmit a reply signal in response to the transmitted signal, for thereby effecting radio communication with the radio-frequency tag communication device, and wherein the radio-frequency tag communication device includes a directivity control portion configured to control a directivity of communication with the radio-frequency tag, on the basis of a result of the radio communication of the radio-frequency tag communication device with the at least one reference tag.11-13-2008
20120293308Method and System for Networking Radio Tags in a Radio Frequency Identification System - A radio frequency tag for a radio frequency identification system is provided that includes an antenna and a receiver coupled to the antenna. The receiver receives and demodulates a message received on at least one frequency. A retransmit controller receives the message, determines a retransmit status for the message, and if the retransmit status is positive, initiates retransmission of the message for reception by another radio tag.11-22-2012
20080266059Quadrature demodulator and interrogator - A quadrature demodulator generates an I-signal from a modulated reception signal and a local signal, generates a Q-signal from the local signal and the local signal having a phase shifted through 90 degrees. Capacitors remove DC components from the I- and Q-signals. Low-pass filters remove frequency components higher than the frequencies of the I- and Q-signals. An I-signal squaring section squares the I-signal having passed through the low-pass filters. A Q-signal squaring section squares the Q-signal having passed through the low-pass filters. An adding section adds the squared I-signal and the squared Q-signal together. A comparator then compares the level of an S10-30-2008
20080290996PIPELINING PROCESSES IN A RF READER - The present disclosure includes a method and system for pipelining processes in an RF reader. In some implementations, a method includes receiving, from a transponder, a reply to an initial command. A physical (PHY) layer and a media control access (MAC) layer are pipelined to initiate transmission of a subsequent command during demodulation of the transponder reply.11-27-2008
20090303016Method for Commissioning an RFID Network - The invention relates to a method for implementing an RFID network, comprising the following steps: each read-write station transmits at least one test signal; each read-write station (12-10-2009
20090160620Smartbeam Visibility Network - A method for providing real-time visibility on a construction project includes steps of: attaching a low-frequency, ultra low-power, two-way transceiver radio tag to each construction material to be used in the construction project; storing data relating to the construction material in the tag; and reading the data from the transceiver of the tag by interrogating the radio tag with radio frequency interrogation signals.06-25-2009
20080315998Trigger Arrangement for a Multi-function Device - Described is a device including a first functional component, a second functional component and a control unit coupled to and capable of activating the first and second components. The device further includes a trigger arrangement coupled to the control unit, and at least one sensor coupled to the control unit and capable of detecting when the trigger arrangement is in one of a first triggering position and a second triggering position. When the at least one sensor detects that the trigger arrangement is activated and in the first triggering position, the control unit activates the first component and when the at least one sensor detects that the trigger arrangement is activated and in the second triggering position, the control unit activates the second component.12-25-2008
20090015383Inductively coupled extension antenna for a radio frequency identification reader - Systems and methods are described for adapting a portable RFID reader to create a portable RFID reader assembly that includes an extension antenna. In many embodiments, the extension antenna can be added to increase the reach of the portable RFID reader. The extension antenna is inductively coupled to the portable RFID reader and in many embodiments, the extension antenna is retrofit to an existing portable RFID reader. In other embodiments, a portable RFID reader and one or more extension antennas are produced as part of a set. One embodiment of the invention includes a reader having reader circuitry configured to generate an activation signal, a first antenna, where the first antenna is electrically connected to the reader circuitry, a reader housing containing the reader circuitry, an extension antenna including an elongated housing, a second antenna located at one end of the housing, and a third antenna located at the opposite end of the housing, where the second antenna is electrically connected to the third antenna. In addition, the first antenna and second antenna are inductively coupled.01-15-2009
20110221575RFID CIRCUITRY AND METHODS OF USING THE SAME TO PROVIDE INFORMATION OF EVENTS PERTAINING TO AN ELECTRONIC DEVICE - An electronic device with RFID circuitry is provided. The electronic device is operative to instruct the RFID circuitry to provide a desired message indicative of an event associated with the electronic device. For example, if the electronic device experienced some type of system failure, the device may instruct the RFID circuitry to provide a message indicative of that failure.09-15-2011
20110140861Two Directional Information Flow in Real Time Location Sensing RFID Networks - An RFID system with a plurality of tags and base stations where transmission of information to a specific tag is carried out by one of the base stations, where said one of the base stations is selected based on received signal power of the tag relative to the plurality of the base stations.06-16-2011
20090085723Computer application interface to radio-frequency identification data - An interface to radio-frequency identification (RFID) data provides RFID data in response to an event cycle specification received from an application. The interface is configured to receive the event cycle specification that identifies one or more RFID sources. The event cycle specification also includes a boundary specification that defines a boundary for an event cycle and a report specification that defines a requested output of a non-redundant RFID data. The interface to RFID data, in response to receiving the event cycle specification, provides an output of non-redundant RFID data conforming to the event cycle specification.04-02-2009
20090212920INTELLIGENT ASSET PROTECTION SYSTEM - An intelligent asset protection system is claimed and disclosed which features a plurality of devices are used to protect a retail establishment by radiating and detecting into a protection zone to identify transponders within a given area. These devices that radiate and detect are typically located in the ceiling or above the area that is desired to be monitored and create a cone shaped interrogation field which expands as it is broadcast downward into the monitored area. In communication with the RAD units, the system uses transponders capable of storing information which includes passwords and unique identifiers as well as information about the object to which the transponder is attached. The transponder is capable of responding to a RAD unit and broadcasting information to it which may include the information stored on the transponder. The transponder in some embodiments will have a battery located on board, but the transponder will remain in an inactive sleep mode until a RAD unit contacts it with a radiated08-27-2009
20090256684COMMUNICATIONS SYSTEM AND MEMORY CARD - Disclosed herein is a communications system in which a transponder having no radio wave generating source executes data transmission with a reader/writer. The transponder is incorporated in a memory card having a memory with which the reader/writer reads and writes information the memory card being used as loaded in a dedicated slot of a host device. The reader/writer transmits a beacon signal telling a service area at a predetermined time interval. The memory card waits for a beacon signal from the reader/writer within a preset period of time after the host device loaded with the memory card is powered on, executes a connection establishment procedure with the reader/writer upon reception of the signal within the preset period of time and, if the beacon signal has not been received within die preset period of time, enters a sleep state in which at least a wait state of the transponder is stopped.10-15-2009
20100156604RFID TAG READING APPARATUS AND METHOD - A method comprises identifying a known-ID-number set comprising at least two ID numbers of corresponding tags and each ID number comprises a plurality of bit positions; calculating an entropy between each corresponding bit position in the known-ID-number set; identifying the bit position having a greatest entropy; and transmitting a reading query to the tags in a communication range. The reading query includes a differential specific number corresponding to the bit position having the greatest entropy.06-24-2010
20100176928APPARATUS FOR COMMUNICATING WITH RFID TAG - This disclosure discloses an apparatus configured to conduct radio communication with at least one RFID tag having a reversible flag capable of being reversed at response; communication area switching portion capable of sequentially switching and generating a plurality of modes of communication areas from the antenna device; flag unification command transmitting portion configured to transmit a flag unification command for unifying the reversible flag of the RFID tag present within the communication area to a state before reverse to the RFID tag present in each mode of the communication area sequentially generated by the communication area switching portion through the antenna device; and reading command transmitting portion configured to transmit a reading command for obtaining information stored in the RFID tag to the RFID tag after the flag unification command is transmitted to the RFID tag in the plurality of modes of communication area.07-15-2010
20100176927Device and Method for Analysing Radio-Frequency Systems - The invention relates to a device for analysing radio-frequency systems. Such a device comprises means for detecting radio-frequency electromagnetic signals, and means for determining at least one analog property of the radio-frequency signal received form the reader. According to the invention, the device further comprises means for producing an electromagnetic excitation signal in order to excite the radio-frequency tag, and means for determining at least one analog property of the return signal received from the radio-frequency tag. The device permits the effective analysis of RFID systems, for example, in system-installation and error-searching situations.07-15-2010
20090079547Method, Apparatus and Computer Program Product for Providing a Determination of Implicit Recommendations - An apparatus for providing a determination of implicit recommendations may include a processing element. The processing element may be configured to receive sensor data from at least one sensor, determine context information associated with the at least one sensor, and determine an implicit recommendation based on the sensor data and the context information.03-26-2009
20100259367RFID READ/WRITE STATION AND A METHOD FOR OPERATING SUCH - An RFID read/write station includes read/write equipment with a transmitter, a receiver, a processor unit, and at least one read/write antenna. A first passive electronic tag is coupled via a first coupling element to an output from the transmitter and an input to the receiver with a pre-set coefficient of coupling, while a second passive electronic tag is coupled to a read/write antenna through a second coupling element with a pre-set coefficient of coupling. For the purpose of periodically or aperiodically monitoring the RFID read/write station, an identification of the first and second tags can be made and/or the data content of which can be read.10-14-2010
20100253481Method and system for miniature passive RFID tags and readers - This invention makes possible small size, long range, reliable, low-power, low-cost RFIDs fulfilling the needs of the industry and the roadmap set for RFID, as by Walmart and the DoD. Tag energization and data communication take place by independent means. The invention employs low-power communication means, such as ultra wideband (UWB), for transfer of data between Tag and Reader, and relatively high power narrowband means to remotely energize the Tag. Said means of powering and communication mechanisms, further, are independent of the underlying process, or technology, of implementation of the Microchip on the Tag, as well as from the transceiver technology aboard the Reader. As such, they provide an ideal method and system by which to power and communicate with RFIDs, through cycles of evolution and changes in physical implementation technology.10-07-2010
20100141393System and method for group tracking - The present invention relates generally to a system and method for group tracking wherein at least one individual within a tracked group is provided with an article of footwear equipped with a wireless tracking device. The wireless tracking device is configured for bi-directional communications with a monitoring center, wherein the wireless tracking device is adapted to determine and store absolute location information of the individual wearing the wireless tracking device and the location information of at least one other individual within the tracked group. Each individual's tracking device has a unique identifier for identifying the individual with a monitoring center at a remote location and/or portable monitoring unit.06-10-2010
20090237217PACKAGING BOX, PACKAGING MATERIAL, TAG ID READING METHOD, AND TAG ID TRANSMITTING PROGRAM - A packaging box includes a body which has a top surface, a base, and a side, first and second signal conductors, and an RFID tag. The first signal conductor is provided on a first region of the body. The second signal conductor is provided on a second region of the body. The RFID tag is attached to the side in a third region as being electrically insulated from the first and the second signal conductors with a first electrode thereof connected to the first signal conductor and a second electrode thereof connected to the second signal conductor.09-24-2009
20090322489MACHINE VISION RFID EXCITER TRIGGERING SYSTEM - Systems and methods are described for triggering interrogation of RFID tags by an RFID system in different interrogation spaces in response to detection of the presence and/or motion of an object using a machine vision system. One embodiment of the invention includes an RFID exciter configured to communicate with a master controller, where the master controller is configured to control activation of the RFID exciter and a video camera connected to an application server, where the application server is configured to communicate with the master controller. In addition, the video camera is configured to provide a video sequence of a scene to the application server, the application server is configured to store information concerning a region of interest within the scene, the application server is configured to detect motion within the region of interest using the video sequence, the application server is configured to send a trigger message to the master controller in response to the detection of motion within the region of interest, and the master controller is configured to activate the RFID exciter in response to receipt of a trigger message from the application server.12-31-2009
20090322487DETERMINING ENDPOINT CONNECTIVITY OF CABLING INTERCONNECTS - In a communication network or system, cables that interconnect systems or subsystems are provided with RFID tags embedded or affixed at least at one endpoint of each cable. An installed or portable RFID reader in the proximity of an RFID tag of a given cable enables a unique cable endpoint identifier contained in the RFID tag to be read. The identifier is combined with a unique port identifier of the port to which the cable endpoint is attached at the message is sent to a far-end system or subsystem connected to the other end of the cable. That system reads the message and the information contained therein along with a unique port identifier of its own port connected to the given cable, enables positive confirmation of the communicative connection between the two ports and also the cable providing the connection. It also enables communication of the physical routing information to an operations support system for cable management.12-31-2009
20120242459INTERROGATING AN AUTHENTICATION DEVICE - Methods, systems, and computer programs for interrogating an authentication device are disclosed. For example, a mobile device can include an interrogator module that interrogates an authentication module in a mobile device accessory, for example, upon installation of the mobile device accessory. In some implementations, challenge-response pairs and a challenge-response distribution are stored in a memory of an interrogator module. The challenge-response distribution defines selection probabilities for the challenge values. In some instances, the interrogator module receives an authentication request from an authentication module, and in response to the authentication request, the interrogator module selects an initial challenge value according to the challenge-response distribution. The interrogator module sends the authentication module an interrogation message that includes the initial challenge value. The interrogator module can modify the challenge-response distribution, for example, based on suspicious behavior.09-27-2012
20080278292Wireless Tracking System And Method Utilizing Tags With Variable Power Level Transmissions - The present invention provides a solution to mistaken location calculations based on multipath effects. The present invention utilizes tags attached to objects that transmit signals at various power levels for reception by sensors stationed throughout a facility. Sensor readings at the various power levels are utilized to determine the location of the tagged object.11-13-2008
20110128128METHOD AND APPARATUS FOR IMPROVING RFID TAG READING - An apparatus and method for improving RFID tag reading. The apparatus includes a substrate element having a predetermined active area, and a plurality of resonant elements each having a resonant frequency, a quality factor, and a response band. The resonant elements are distributed within the predetermined active area of the substrate element for scattering interrogation electromagnetic waves radiated thereupon from the RFID reader. At least one resonant element has a null-direction thereof orientated in a direction that is substantially orthogonal to a line extending from a center of the resonant element to a center of an antenna of the RFID reader.06-02-2011
20100127835METHOD AND APPARATUS FOR SELECTIVELY FACILITATING ACCESS TO RFID DATA - Methods and apparatus for selectively facilitating access to RFID data of one more RFID tags within a faraday cage are disclosed herein. In some embodiments, (i) an external RFID interrogation signal is received (for example, by one more external antennae deployed outside of the faraday cage; (ii) a determination is made if access to RFID data of one more RFID tags within the faraday cage is permitted; and (iii) contingent on the determining that access from outside of the faraday cage is permitted, access is provided to RFID data of one or more RFID tag(s) within the faraday cage. This access providing may include the steps of: i) in response to the received external RFID interrogation signal, interrogating inside the faraday the cage one or more RFID tags; ii) receiving an RFID response from one or more of the interrogated RFID tags; and iii) transmitting to outside the faraday cage the received RFID response.05-27-2010
20110241843BATTERY-LESS OPERATED BI-STABLE DISPLAY BY WIRELESS POWER TRANSMISSION - Updating content of e-paper ESL device(s) otherwise in a powered-down state is disclosed. One or more e-paper ESL devices need only be turned on when it is desired or needed to change and update content displayed. Transmission of a wireless energy burst having a magnetic resonating power coupling characteristic powers up the e-paper ESL device from a powered-down to powered-up state. The content of the e-paper ESL device can then be changed in accordance with data and instructions transmitted with the wireless energy burst.10-06-2011
20090322488WIRELESS DATA COMMUNICATION SYSTEM HAVING RADIO FREQUENCY DEVICES, AND RELATED OPERATING METHODS FOR DISABLING A TRANSMIT MODE - A wireless system suitable for use as a radio frequency (RF) locationing or presence detection system includes at least one wireless access device and at least wireless device, such as an active RF tag, corresponding to an item or asset of interest. A method of managing RF transmissions by the wireless devices is provided. The method involves the wireless device receiving keep-alive beacons during a first period of time. During this first period of time, the wireless device is operated in a transmit mode. During a second period of time that follows the first period of time, the wireless device receives no keep-alive beacons. During this second period of time, the wireless device is operated in a standby mode such that RF transmissions are disabled.12-31-2009
20090102611WIRELESS DISPOSABLE PHYSIOLOGICAL SENSOR - A patient physiological parameter monitoring apparatus for a subject includes a sensor assembly having at least one responsive element that produces a first signal upon detection of a change in temperature. The assembly also includes a converter for converting the first signal into an electrical signal, and a transmitter for wirelessly transmitting converted electrical signals upon demand based upon receipt of a transmitted signal from an interrogation device. Preferably, at least a portion of the sensor assembly is disposable to permit single use or single subject use and can be further used to track location and information of medical equipment in addition to subjects.04-23-2009
20110084812RFID INTERROGATOR DEVICE - An RFID interrogator device has a transmission section for transmitting a command to an RFID tag and a reception section for receiving an RF signal from the RFID tag and is configured to perform backscatter radio communication with the RFID tag. The RFID interrogator device comprises a time window setting section configured to set a time window at timing of receiving preamble data added to a head of response data transmitted from the RFID tag in response to the command, and an identifying data storage section storing preamble identifying data. The RFID interrogator device compares the data received within the time window, with preamble identifying data stored in the identifying data storage section, thereby determining whether the data received is identical to the preamble data transmitted from the RFID tag.04-14-2011
20110148593METHOD FOR READING A VEHICLE TAG WITHIN A READ STATION - A method of reading a data transmission from an electronic transmitting device mounted to a vehicle tire assembly includes: positioning a convex upper surface of a stand to intercept a vehicle tire of the vehicle tire assembly; establishing rotational engagement between the vehicle tire and the convex upper surface of the stand to slow the speed of the vehicle and reduce the rotational rate at which the vehicle tire rotates to a targeted reduced rotational read rate; and directing an antenna field from at least one antenna toward an approach path (and at least one antenna toward the exiting path) of the vehicle tire to the convex upper surface and lower surface of the stand to receive data transmission from the electronic transmitting device as the vehicle tire passes over the stand upper surface then down the lower surface at the reduced rotational read rate.06-23-2011
20090322490RADIO FREQUENCY IDENTIFICATION MONITORING SYSTEM AND METHOD - The present invention provides a radio frequency identification (RFID) monitoring method, a reader located in a region to receive a tag ID code from a RFID tag, wherein the method comprises the steps of: (a) sending out a first reading signal from the reader; (b) determining whether the tag ID code is received by the reader; (c) recording a position of the RFID tag in a plane when the tag ID code is received by the reader; (d) rotating the reader a second angle toward a direction perpendicular to the plane; (e) sending out a second reading signal from the reader; (f) determining whether the tag ID code is received by the reader; and (g) recording a position of the RFID tag in the direction when the tag ID code is received by the reader.12-31-2009
20110241844APPLIANCE INCLUDING A RADIO FREQUENCY IDENTIFICATION (RFID) DEVICE AND METHOD FOR TWO-WAY COMMUNICATION OF DYNAMIC DATA BY THE APPLIANCE VIA THE RFID DEVICE - An appliance including a two-way radio frequency identification (RFID) device for dynamic communications, with for example, an RFID reader used by a technician. The RFID device may include an electronic controller structured to control operating functions of the appliance. The RFID device may further include a storage medium structured to store information about the appliance and computer-executable instructions operable to control the operating functions of the appliance. A transmitter may be incorporated allowing the appliance to send and receive dynamic data between the appliance and one or more remote RFID devices using two-way communication protocols at all levels.10-06-2011
20100066505INFORMATION ACCESS SYSTEM, CONTACTLESS READER AND WRITER DEVICE, AND CONTACTLESS INFORMATION STORAGE DEVICE - In a reader and writer device, a sleep period setter determines an identification in a received response, and a length of a sleep period depending on a number of received identifications, a first transmitter transmits either an information request or an information and sleep request carrying the sleep length and the received identification, and a first receiver receives a response carrying an identification. In each of information storage devices, a second receiver senses a carrier, and receives the information request or the information and sleep request in response to carrier detection, and a second transmitter, in response to the information request or the information and sleep request carrying no identification of that device, transmits a response carrying the identification of that device, and, in response to the information and sleep request carrying the identification of that device, is in an inactive state during the sleep time period.03-18-2010
20110148594RFID SYSTEM - An RFID system controls a device using a serial interface protocol through the use of a wireless communication scheme thereof. The RFID system includes: a digital unit configured to control the command signal generated according to a radio signal, and generate an address, data, and a control signal; a memory unit configured to perform a data read or write operation according to the control signal applied from the digital unit; a coupling unit coupled to an external driving device; a decoder configured to decode an output data of the memory unit; and a driving controller configured to sequentially output decoded data of the decoder to the coupling unit in synchronization with a serial clock.06-23-2011
20110068906SYSTEMS, METHODS, AND APPARATUSES FOR MANAGING CONFIGURABLE MONITORING DEVICES - Provided are embodiments of configurable monitoring devices, methods, systems, computer readable storage media and other means for locating devices. In some examples, the devices are attached to a retail or other type of article. The devices can be dynamically configurable and communicate wirelessly with other network entities.03-24-2011
20100302011TRACKING OF AND COMMUNICATION WITH MOBILE TERMINALS USING A BATTERY-POWERED WIRELESS NETWORK INFRASTRUCTURE - There is provided a method of reducing energy consumption of tag readers in a wireless network, the method comprising: (a) turning a transmitter and a receiver of the tag reader to a power-off state; b) powering-on the transmitter of the tag reader for a limited transmission time frame; c) during the transmission time frame, transmitting a beacon message comprising an identifier of the tag reader, channel characteristics of the tag reader and a powering-on schedule of the receiver of the tag reader, for allowing tags in the network to communicate with the tag reader, where the tags are almost continuously in a power-on state; d) powering-on the receiver of the tag reader during a limited reception time frame in accordance with the schedule, for enabling the receiver to receive messages transmitted by the tags in the network if required; e) repeating steps a) to d) periodically. There is further provided a battery-powered tag reader which reduces energy consumption. There is further provided a battery-powered wireless network with an energy management for tag reader. There is further provided a method of increasing probability of detection of rapidly moving clusters of mobile nodes in a wireless network.12-02-2010
20100085161DATA COMMUNICATION APPARATUS, COMMUNICATION METHOD, AND PROGRAM - In a data reading apparatus performing contactless data communications with IC tags, a multi channel setting section sets a plurality of frequencies to be used for data communication with an IC tag in advance; a multi channel interference detecting section detects radio interference from other data reader in each of the set plurality of frequencies, prior to occurrence of a data communication request with an IC tag; a carrier sense lapse time holding section holds a period of no interference based on an interference detection result from the multi channel interference detecting section; a time comparing section determines whether the carrier sense lapse time held by the carrier sense lapse time holding section is on or above a predetermined carrier sense time upon occurrence of the data communication request with the IC tag, and permits the data communication with the IC tag when the carrier sense lapse time is on or above the carrier sense time; a transmitting section transmits data to the IC tag; and hence wait time for interference detection may be reduced.04-08-2010
20080272892Sampling to obtain signal from RFID card - A radio frequency identification (RFID) reader of an apparatus in an example employs substantially synchronized sampling to obtain a signal from an RFID card notwithstanding employment by the RFID card of any of amplitude shift keying (ASK), frequency shift keying (FSK), or phase shift keying (PSK). The RFID reader decodes the signal notwithstanding the employment by the RFID card of any of ASK, FSK, or PSK.11-06-2008
20110187509SOFTWARE-DEFINED MULTI-MODE RFID READ DEVICES - Devices and methods for reading multiple types of RFID tags having different frequencies and/or encoding schemes are disclosed. One or more search signals covering a plurality of RFID bands are transmitted. A presence indication of an RFID tag in one of the plurality of RFID bands is detected. An interrogating signal having a carrier frequency tuned to a frequency at which the presence indication is detected is transmitted. A tag response signal comprising tag information associated with the RFID tag is received. A digital response signal based on the tag response signal is digital signal processed to obtain the tag information.08-04-2011
20080204200Systems and methods of locating raido frequency identification tags by radio frequencey technology - Methods and systems with one or more mobile transceivers to locate position of radio frequency identification (RFID) tags via radio frequency (RF) technology are disclosed. The systems called RF Locator (RFL) include at least one mobile RF transceiver and other functional components such as, a globe positioning system (GPS), a processor, and a display. Information of space positions, times and physical characteristics related to RF signals are collected sequentially by the mobile transceiver(s) during RFID tag locating process. The processor calculates the location of the RFID tag by using the collected information. Two methods to determine the location of the RFID tag are disclosed in this invention. The first method is to utilize the information of space positions and times. The second method is to use the information of space positions and RF signal characteristics.08-28-2008
20110163855CONTACTLESS IC CARD READER AND DATA READING METHOD - A contactless IC card reader and a data reading method which are capable of improving data reading accuracy while preventing a decrease in processing speed. Specifically, in a contactless IC card reader which transmits signals composed of amplitude modulated carrier signals to a contactless IC card, the contactless IC card and reader communicate by means of an NRZ encoding method and an ASK modulating method for which the modulation depth has an arbitrary value. The contactless IC card reader is provided with a contactless control means which modulates/demodulates signals transmitted to/received from the contactless IC card, and a main control means which is electrically connected to the contactless control means and that controls the entire card reader. The modulation depth that is varied by the contactless control means based on the command sent from the main control means has multiple range widths with an arbitral value as the standard.07-07-2011
20110133902ELECTRONIC LABEL AUTHENTICATING METHOD AND SYSTEM - An electronic label authenticating method is provided, the method includes: the electronic label receives an accessing authenticating request group sent by a reader-writer, the group carries a first parameter selected by the reader-writer; the electronic label sends a response group of the accessing authenticating to the reader-writer, the response group of the accessing authenticating includes the first parameter and a second parameter selected by the electronic label; the electronic label receives an acknowledgement group of the accessing authenticating feed back by the reader-writer; the electronic label validates the acknowledgement group of the accessing authenticating. An electronic label authenticating system is also provided, the system includes a reader-writer and an electronic label.06-09-2011
20110080266Power Controller for an Electronic Reader Device - A system and method for controlling the power of an electronic reader device is provided. The system for controlling the power of an electronic reader device may comprise a computing apparatus that may receive a command from a host system to change the power state a power controller. The system may also comprise a computing apparatus that may adjust the power state of the power controller by using one or more registers. The system may further comprise a computing apparatus that may adjust the power of one or more power supplies. The system may additionally comprise a computing apparatus that may instruct a display controller to perform an operation based on the change of the power state of the power controller.04-07-2011
20100214074LPRF DEVICE WAKE UP USING WIRELESS TAG - A wireless transceiver includes: (a) a low power radio frequency (LPRF) communications component capable of powering down to conserve energy and capable of powering up in response to an electronic signal, the LPRF communications component including a transmitter and a first receiver; and (b) a second receiver that is configured to screen a radio frequency broadcast and provide, on the basis of specific data identified therein, the electronic signal to the LPRF communications component in order to power up the LPRF communications component. The second receiver is adapted to draw less current than the LPRF communications component while awaiting receipt of and listening for a radio frequency broadcast.08-26-2010
20100066506ASYNCHRONOUS COMMUNICATION SYSTEM FOR REMOTE MONITORING OF OBJECTS OR AN ENVIRONMENT - A system provides for remote monitoring using asynchronous code division multiple access (CDMA) communication techniques between a base station and one or more transponders. Each transponder is attached or otherwise associated with an object or an environment to be monitored. Upon receipt of an interrogation signal, a transponder generates and transmits a coded transponder signal containing the monitored data. The coded transponder signal is generated using a spreading code. Each transponder is associated with a unique, mutually exclusive set of spreading codes. Each spreading code is based on a unique transponder address and the monitored data to be sent. A detector asynchronously monitors received signals for any of the available spreading codes. Once the detector detects a particular spreading code, the base station can identify the source transponder and extract the monitored data.03-18-2010
20100066504RADIO IC TAG READER, ITS CONTROLLER, AND RADIO IC TAG READING SYSTEM - A radio IC tag reader comprises: a first variable frequency oscillation section for generating a signal having a frequency meeting a unit radio channel used for transmission/reception to/from a radio IC tag; transmission and reception sections for executing transmission/reception to/from the radio IC tag by using the signal; a second variable frequency oscillation section for changeably generating a signal of a frequency meeting a unit radio channel for measuring the strength of a received electric wave; a carrier sense executing section for measuring strength of a received electric wave in each of the unit radio channels by using the signal; and a main control section for controlling the first variable frequency oscillation section so as to generate a carrier signal having a frequency meeting the next unit radio channel used by the transmission and reception sections based on a result of measurement by the carrier sense executing section, upon passage of a continuous transmittable time after start of transmission/reception.03-18-2010
20080218315Electronic Component Comprising a Modulator - The invention relates to an electronic component, in particular and RFID transponder, and also a security document comprising such an electronic component. The electronic component has a modulator for modulating a carrier signal, said modulator being constructed from at least two organic field effect transistors (09-11-2008
20100194543ACCURATE PERSISTENT NODES - A timing circuit that can function as an accurate persistent node in an RFID tag includes a power capture circuit for capturing power from a power source, and a counter circuit that provides a count representing a progression of time. The count can then be compared to a reference value representing a time constant of the circuit.08-05-2010
20110148592ANTENNA ASSEMBLY FOR A TAG READER - An antenna assembly includes a stand having a convex outer surface positioned to intercept and engage a vehicle tire as the vehicle tire passes over the convex stand surface. The height and contour of the convex stand surface slows the rotational rate of the vehicle tire, and thereby a transmitting device carried by the tire, to a preferred rotational read rate as the vehicle tire passes over the convex surface. One or more antenna members mount to the stand proximal to the convex surface, each antenna having a directionally aimed tilted antenna field positioned to continuously receive data transmission from the electronic transmitting device as the vehicle tire passes over the convex stand surface at the reduced rotational read rate.06-23-2011
20090033469Remote Detector And Method And Use Of A Remote Detector - The invention relates to a remote detector or sensor system. The system comprise a reading device (02-05-2009
20120306625ENHANCED IDENTIFICATION SYSTEM - A method and an identification system used for communicating between a reader and a plurality of transponders are disclosed. The reader has a transmitter for transmitting a signal and each transponder includes a receiver for receiving the reader signal and a transmitter for generating a transponder signal. When the reader recognises a transponder signal from one of the transponders it immediately issues a mute instruction, muting all other active transponders and passing control to the said transponder, without the need for a specifically timed acknowledgement to the said controlling transponder. The reader may issue a single disable/wakeup instruction which disables the controlling transponder returning control to the reader and reactivated all muted (but not disabled) transponders.12-06-2012
20110304439DEVICES EMPLOYING FAST CARRIER CANCELLATION AND METHODS THEREOF - In one embodiment, a RFID reader circuit includes a RF power amplifier coupled to a coupler; an amplitude and phase adjustor module coupled to an output of the coupler; a signal combiner module coupled to an output of the amplitude and phase adjustor module; and a low noise amplifier coupled to an output of the signal combiner module. In another embodiment, a RFID system includes a plurality of RFID tags; and at least one RFID reader, the at least one RFID reader comprising a RFID reader circuit, the circuit comprising: a RF power amplifier coupled to a coupler; an amplitude and phase adjustor module coupled to an output of the coupler; a signal combiner module coupled to an output of the amplitude and phase adjustor module; and a low noise amplifier coupled to an output of the signal combiner module. Other systems, methods, and circuits are described as well.12-15-2011
20110025471RFID transponder, in particular for assembly on metal and manufacturing method therefor - The invention relates to an RFID transponder comprising: an antenna, a chip comprising at least one transmission and reception circuit as well as a memory, a dielectric carrier element which is covered on a first surface at least sectionally with a structured first metallization and which is covered on a second surface disposed opposite the first surface at least sectionally with a second metallization, wherein the first and second metallizations are mutually electrically conductively connected, thereby forming the antenna, wherein the first metallization is structured such that it forms two electric terminals of the antenna arranged on the first surface of the dielectric carrier element, and wherein the chip can be or is electrically contacted via these two terminals and is positionable or arranged on the first surface and/or is positionable or arranged at least sectionally integrated into this surface, and an adaptation network at least partly formed by the structuring of the first metallization and adapting the input impedance of the antenna in a conjugate complex manner to the impedance of the chip.02-03-2011
20120206241GATEWAY RADIO FREQUENCY IDENTIFICATION TAG SYSTEM - A system and method are disclosed for transporting deterministic traffic in a gigabit passive optical network. A system that incorporates teachings of the present disclosure may include, for example, an Optical Line Termination (OLT) for exchanging data traffic in a Gigabit Passive Optical Network (GPON) having a controller programmed to generate a timeslot schedule for transport of a desired bandwidth of constant bit rate (CBR) data traffic by selecting one or more timeslots from periodic frame clusters operating according to a GPON Transmission Convergence (GTC) protocol. Additional embodiments are disclosed.08-16-2012
20100097192BACK-DOOR DATA SYNCHRONIZATION FOR A MULTIPLE REMOTE MEASUREMENT SYSTEM - Disclosed is an apparatus and methodology for synchronizing data received at a central location that has been collected at plural remote locations and separately transmitted to the central location. A plurality of remote sensors is provided and configured to be simultaneously triggered to begin a data collection sequence and to subsequently transmit the collected data along with remote sensor identification data and timing information to the central location. Timing information may include a specifically transmitted time reference or may be derived based on successive transmissions from the individual remote sensors.04-22-2010
20110095870METHOD FOR MEASURING PRESSURE IN A TIRE - A method for sensing pressure in a pressurized article utilizing an electronic tag includes: calculating the impedance of a tag antenna, the tag antenna being flexible and at least partially composed of a flexible conductive pressure sensitive material including rubber; measuring changes in antenna impedance resulting from changes in pressure exerted on the tag antenna; calculating changes in tag transmission signal strength resulting from changes in antenna impedance; at least partially embedding the electronic tag within a wall portion of the article, the wall portion at least partially defining an article cavity and exerting a compressive force on the tag antenna of a magnitude determined by the magnitude of air pressure within the cavity; measuring the tag transmission signal strength with the tag antenna subjected to pressure from the article wall portion; determining the magnitude of air pressure within the cavity required to effect a compressive force on the tag antenna by the article wall sufficient to result in the measured tag transmission signal strength.04-28-2011
20100182130POKER CHIPS AND METHODS OF READING THE SAME - A method for reading poker chips according to one embodiment includes sending out an interrogation signal; receiving responses from poker chips in response to the interrogation signal, each of the poker chips comprising a circuit and an antenna coupled to the circuit, wherein the antenna minimally affects electromagnetic RF fields surrounding the antenna even in the vicinity of the antenna; and determining a value of the poker chips from which responses are received. A poker chip according to another embodiment includes a circuit on or within a substrate; and an antenna coupled to the circuit, wherein the antenna minimally affects electromagnetic RF fields surrounding the antenna even in the vicinity of the antenna. Additional systems and methods are disclosed.07-22-2010
20100277284Data separation in high density environments - Systems and methods for data separation, which may be employed to receive and process RFID tag data in RF signal environments where multiple RFID tags are tracked, localized and/or employed to transmit information. The disclosed systems and methods may be implemented for data separation in a high density aRFID environment using RFID tags in combination with spatial and/or frequency separation.11-04-2010
20110063087RESISTIVE AND CAPACITIVE MODULATION IN AN ELECTROMAGNETIC TRANSPONDER - The selection of at least one back-modulation element of an electromagnetic transponder from among a plurality of resistive and/or capacitive modulation elements of the load of an oscillating circuit of the transponder, including selecting the modulation element(s) according to a binary message received from a read/write terminal.03-17-2011
20090134977Method and apparatus for RFID device coexistance - In accordance with exemplary embodiments, a radio frequency identification (RFID) device might employ channel-in-use sensing and time multiplexing transmission to prevent radio systems of RFID devices in close proximity to one another from transmitting while another one of the RFID devices is transmitting so as to reduce, for example, radio interference at the transmitting RFID device. RFID transceivers not transmitting might employ a random back off procedure once a close proximity transmission is detected so that the RFID devices do not repetitively try to seize the channel at approximately the same time.05-28-2009
20090134976APPARATUS AND METHOD FOR PROCESSING DATA IN TRANSMITTING AND RECEIVING END OF RFID SYSTEM - A data receiving and processing system includes: an RF front-end circuit, for receiving an analog signal and generating received data; a processing unit, coupled to the RF front-end circuit, for performing processing on the received data; and a buffering circuit, coupled between the processing unit and the RF front-end circuit, for buffering the received data; wherein data transmitted between the RF front-end circuit and the buffering circuit is serial data, and data transmitted between the buffering circuit and the processing unit is parallel data.05-28-2009
20110090061Methods for Noise Validated Phase Ranging RFID Location - A method and apparatus for validating a distance output of a phase ranging RFID location system, based upon the phase readings included in data sets obtained from monitoring reply signals corresponding to interrogation signals at multiple frequencies and a common interrogation signal beam direction; by comparison of measured phase and frequency data sets with theoretical phases calculated with respect to the same frequencies over a range of positions corresponding to a beam extent of the interrogation signal. The distance output validated by comparison with theoretical threshold data processed to generate an extreme values distribution from which a cumulative distribution function is extracted and against which a confidence level is applied.04-21-2011
20110090060Isolating RFID Reader - Systems and methods for using a multimodal handheld reader are described. The reader can be used to read non electronic labels, passive RFID tags using backscatter modulation techniques and battery based active RFID tags using a single handheld. The reader deploys a multiplexed antenna design and thereby contains a method to read a group of passive RFID tags and at the same time the reader can isolate a single passive RFID tag from amongst a group of passive RFID tags within close proximity. All such passive RFID tags use backscatter modulation techniques and are in the readers own RF zone.04-21-2011
20100289624APPARATUS FOR COMMUNICATING WITH RFID TAG - The disclosure discloses an apparatus for communicating with an RFID tag of a movable type, comprising: an apparatus antenna configured to conduct information transmission and reception with respect to an RFID tag circuit element; a transmission processing portion configured to generate an inquiry signal for obtaining the information stored and transmits the signal via the apparatus antenna; a reception processing portion configured to be able to receive a response signal replied from the RFID tag circuit element via the apparatus antenna; a notifying device configured to make notification according to a reception result; and a notification control portion configured to control the notifying device so that the notification by the notifying device is in a mode corresponding at least to movement of the apparatus before the notification of the notifying device is started after the reception processing by the reception processing portion is performed.11-18-2010
20100289623INTERROGATING RADIO FREQUENCY IDENTIFICATION (RFID) TAGS - The present disclosure is directed to a system and method for interrogating RFID tags. In some implementations, a method includes transmitting an RF command signal to RFID tags in an inhibited zone during a first time period. The RF command signal substantially prevents the RFID tags in the inhibited zone from responding to RF interrogation. RFID tags in a target zone are interrogated during a second time period different from the first time period. The target zone located differently from the inhibited zone.11-18-2010
20100245050RFID SYSTEM AND RADIO APPARATUS - A radio apparatus capable of being used in an RFID system, the apparatus having a memory that stores identification information of the radio apparatus, a timing generation section that measures time, a receiving section that receives an information-request signal requesting transmission of the identification information of the radio apparatus, and that receives an unmodulated-carrier-wave request signal requesting transmission of an unmodulated carrier wave to be used for positioning the radio apparatus; and a transmission section that transmits a response signal carrying the identification information in the memory in response to receiving of the information-request signal, and that transmits the unmodulated carrier wave in an unmodulated-carrier transmission period determined by time period data stored in the memory in accordance with timing from the timing generation section in response to receiving of the unmodulated-carrier-wave request signal.09-30-2010
20100245051Communication Method for Noncontact RF ID System, Noncontact RF ID System, and Transmitter and Receiver - A communication method for a noncontact RF ID system that uses a first waveform, a second waveform, and a third waveform, wherein the first waveform and the second waveform are formed by a basic waveform having one of a rising or falling state transition at the approximate center of the waveform, the third waveform is formed by a plurality of basic waveforms that have one state transition at the approximate center part of the waveform, and the third waveform generates one state transition only at the approximate center of the plurality of basic waveforms. In addition, communication is carried out by using the third waveform in place of the first waveform and the second waveform in the case in which communication is carried out using a first waveform and a second waveform and one state transition is generated outside the approximate center part of the basic waveform.09-30-2010
20100085162METHOD OF SHIPPING AND TRACKING INVENTORY - A universal tracking assembly that is capable of supporting more than one protocol used in electronic article surveillance (EAS) labels. The universal tracking assembly includes an acousto-magnetic (AM) EAS portion with a Radio Frequency (RF) EAS portion. The intrinsic characteristics and properties of the components of these individual labels are utilized to enhance the overall performance and utility of the combined EAS universal tracking assembly.04-08-2010
20120161940METHOD AND SYSTEM FOR ONTOLOGY-DRIVEN QUERYING AND PROGRAMMING OF SENSORS - Described embodiments relate to a method of ontology-driven querying or programming of at least one sensor. The method comprises generating at a query origin a query or command for execution in relation to the at least one sensor, transmitting the query or command to an ontology transformer over a first network, classifying the query or command according to a domain ontology and one or more predetermined capabilities of the at least one sensor, generating a transformed query or program based on the classified query or command using one or more code fragments stored in a memory accessible to the ontology transformer, transmitting the transformed query or program to at least one sensor node in communication with the at least one sensor for execution of the transformed query or program by the at least one sensor node in relation to the at least one sensor, receiving at the ontology transformer from the at least one sensor node at least one result of the query or program, and returning the at least one result.06-28-2012
20100271186LOCATION DETERMINATION SYSTEM - A reader device of a location determination system gradually changes a transmission power step by step and repeatedly sends an interrogation signal which contains therein information on a power level indicating the transmission power. A tag of the location determination system receives the interrogation signal, sends a response signal into which the information on the power level contained in the interrogation signal is incorporated. The reader device receives the response signal and sends, to a management device, the information on the power level contained in the response signal and identification information for identifying the subject reader device. The management device detects the position of the tag based on the information on the power level and the identification information thus received.10-28-2010
20100007471Apparatus for reading RFID tag - This disclosure discloses an apparatus for reading with a radio frequency identification (RFID) tag comprising: a plurality of information creation devices, capable of generating a plurality of types of command signals for making an access to an RFID tag circuit element having an IC circuit part storing information and a tag antenna that transmits and receives information; a plurality of apparatus antennas connected to the plurality of information creation devices, respectively, and configured to transmit the plurality of types of command signals to the RFID tag circuit element via radio communication substantially at the same timing; and a single information processing device configured to obtain reading information by means of receiving processing of a response signal transmitted from the RFID tag circuit element according to the command signal transmitted from the apparatus antenna and received by the apparatus antenna.01-14-2010
20100328043INTERROGATION OF RFID COMMUNICATION UNITS - A dual mode interrogation is carried out by sending narrow band radio frequency interrogation (RFID) signal for narrow band RFID communication units, the narrow band signal comprising substantially continuous periods, and by sending a high data rate RFID interrogation signal during the substantially continuous periods of the narrow band RFID signal so that two different types of RFID communication units are interrogated substantially simultaneously.12-30-2010
20120319824SELECTIVE RF DEVICE ACTIVATION - Systems and methods for activating one or more devices are disclosed. According to one embodiment, the device listens for an activate code, the activate code having a length field and a mask field, the mask field including a mask value, the length field specifying a length of the mask field to a final bit of the mask value. Upon receiving the activate code, the length field is compared to a stored length value for determining whether the length field meets a predefined criterion. If the length field meets the predefined criterion, an address of the activate value is loaded (if an address field is present) and the appropriate bits (mask value) of the mask field are compared to a stored activate value. An activate signal is generated if the mask value matches the stored activate value. The activate signal can be used to activate additional circuitry including the entire device.12-20-2012
20110037570Communication Method for a Radio System and Apparatus and System for Implementing the Method - An apparatus, system and communication method, which is particularly suited for a radio frequency identification system (RFID), wherein a reflection-transmission apparatus is disposed in a radio system and, during a communication process, the reflection and transmission features of reflection-transmission apparatus presented at the radio frequency are changed to introduce a multi-path signal component which changes with time. Consequently, during the communication process, a receiving apparatus receives and combines the multi-path signal component of communication signals and the radio system performs communication by utilizing time diversity effects. The apparatus, system and method provide effective and continued reduction of communication blind spots in the RFID system, thereby improving the overall success rate for the RFID system to read tags and accomplishing a better balance with the overall reading time.02-17-2011
20120326846ELECTRONIC TAG TIME-SHARING CONTROL SYSTEM AND METHOD THEREOF - The present invention discloses an electronic tag time sharing control system and a method thereof, and the system comprises a server, at least one coordinator and a plurality of wireless electronic tags. The server transmits a time-sharing control signal. The coordinator and the server form a wireless connection for receiving and transmitting the time-sharing control signal. The wireless electronic tags and the coordinators form a wireless connection. After each wireless electronic tag receives the time-sharing control signal, different sleep cycle and wakeup timing are generated to update display information sequentially. A portion of the wireless electronic tag is situated at a sleep status and a portion of the wireless electronic tag is situated at a standby status to receive the update display information, so as to achieve the effects of saving bandwidth, reducing packet collisions and extending the service life of the wireless electronic tag.12-27-2012
20130015958TRUNCATION, COMPRESSION, AND ENCRYPTION OF RFID TAG COMMUNICATIONS - An RFID tag is capable of storing data, receiving a signal from a reader, determining a response taking into account the tag mode and the data, and transmitting a response to the reader. The data includes a first plurality of bits and a second plurality of bits. The tag mode may be set by a current or a prior command by the reader. Depending on the tag mode, the response may be complete, or the second plurality of bits may be truncated, compressed, or encrypted. In an aspect of the invention, the response includes an implicit indication of whether the response is complete, truncated, encrypted, or compressed. In another aspect of the invention, a command from the reader indicates how many bits should be truncated, compressed, or encrypted.01-17-2013
20080252426Intelligent Rfid System For Low Powered Reader-Tag Communication and Method Thereof - The present invention relates, in general, to a Radio Frequency Identification (RFID) system for reading or recording RFID tag information using radio frequencies and, more particularly, to an intelligent RFID system for low-powered reader-tag communication, which includes an RF shower system (10-16-2008
20080224827Pest control techniques - A pest control system (09-18-2008
20110273278System and Method for Transmitting Information - A system and method for transmitting information within a space, including sensory modules that each include a data signal receiver and an output element; a first signal emitter that emits a data signal of a first broadcast breadth that directs a signal with a first information set on the operation of the output element to a first portion of the space to a first sensory module within the first portion and a signal with a second information set on the operation of the output element to a second portion of the space to a second sensory module within the second portion; and a second signal emitter that emits a data signal of a second broadcast breadth larger than the first broadcast breadth with a third information set with information on the implementation of the first and second information sets to both the first and second portions of the space.11-10-2011
20100277283Systems and methods for RFID tag operation - A RFID tag system may be configured as a tag having a first band (e.g., multiple channel-based NBFM frequency band) transceiver to allow field programmability of tag behavior and onboard tag data. The RFID tag system may be configured to collect data from one or more local sensors through the first band link and store data points of interest in tag onboard storage. The RFID tag system may be configured to work in conjunction with a remote interrogating unit, and a handheld device or other local interrogating unit may be additionally or alternatively provided to communicate with such aRFID tag. Data that is stored on the RFID tag may be retrieved or changed, and/or the operation of the tag may be modified.11-04-2010
20080197981INTEGRATED CIRCUITS WITH PERSISTENT DATA STORAGE - The circuitry introduced in this invention selectively slows down the functioning of an electronic circuit maintaining a particular state for a prolonged period of time. This circuitry is used not only to achieve the desired effect in maintaining security from electronic thieves trying to circumvent codes but also in other applications such as enabling a circuit to continue to function in the event of a brief loss of power. For example, in an RFID system, if a reader is frequency hopping, a tag loses power for as long as about 400 milliseconds when the reader changes to other frequencies. In a preferred embodiment, the disclosed circuitry is used in conjunction with a destruct sequence.08-21-2008
20100308973THERMALLY CONTROLLED DUTY CYCLE REGULATION IN AN RFID MODULE - A system and methods for measuring the temperature of an RFID reader module and inserting a delay in the RFID reader's duty cycle to prevent the RFID reader from initiating a thermal shutdown. The system and methods are self-adaptable, therefore incurring the benefit regardless of the design of the RFID reader host and its associated heat sink. The system and methods also provide for archiving the collected data and analyzing the data providing the ability to improve the design of the RFID reader host.12-09-2010
20110304440RFID DEVICES USING A COMMON MASTER CLOCK AND METHODS THEREOF - In one embodiment, a RFID reader circuit includes a master clock for providing a timing signal on a timing signal output thereof, a switching regulator synchronized with the timing signal for providing power to the RFID reader circuit, a Radio Frequency (RF) source in a transmitting path, the RF source being coupled to the timing signal output, and an analog-to-digital converter (ADC) in a receiving path, the ADC being coupled to the timing signal output. This circuit may also be included in an RFID system having a reader and a plurality of RFID tags, in one approach. According to another general embodiment, a method for mitigating noise in a RFID reader circuit includes providing a common timing signal or derivatives thereof from a master clock to each component in a RFID reader circuit and to a power supply. Other systems and methods are also shown, according to various embodiments.12-15-2011
20120038464POWER SAVING METHOD - The invention relates to a method for saving power especially for tag talks first data transmission in radio frequency identification (RFID) systems including a tag containing a non-volatile memory, a digital block and an analogue block and a static random access, wherein the data of the non-volatile memory are prefetched from the non-volatile memory into the digital block and the tag talks first data will be stored in the static random access memory embedded in the digital block.02-16-2012
20120086557WIRELESS TERMINAL AND INFORMATION STORAGE METHOD - A wireless terminal is provided that can ensure security while gathering a communication history using little memory. The wireless terminal (04-12-2012

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